--- /dev/null
+Subject: add console_use_vt
+From: kraxel@suse.de
+Patch-mainline: no
+
+$subject says all
+
+---
+ drivers/char/tty_io.c | 7 ++++++-
+ include/linux/console.h | 1 +
+ 2 files changed, 7 insertions(+), 1 deletion(-)
+
+--- a/drivers/char/tty_io.c
++++ b/drivers/char/tty_io.c
+@@ -136,6 +136,8 @@ LIST_HEAD(tty_drivers); /* linked list
+ DEFINE_MUTEX(tty_mutex);
+ EXPORT_SYMBOL(tty_mutex);
+
++int console_use_vt = 1;
++
+ #ifdef CONFIG_UNIX98_PTYS
+ extern struct tty_driver *ptm_driver; /* Unix98 pty masters; for /dev/ptmx */
+ static int ptmx_open(struct inode *, struct file *);
+@@ -2200,7 +2202,7 @@ retry_open:
+ goto got_driver;
+ }
+ #ifdef CONFIG_VT
+- if (device == MKDEV(TTY_MAJOR, 0)) {
++ if (console_use_vt && device == MKDEV(TTY_MAJOR, 0)) {
+ extern struct tty_driver *console_driver;
+ driver = console_driver;
+ index = fg_console;
+@@ -3729,6 +3731,8 @@ static int __init tty_init(void)
+ #endif
+
+ #ifdef CONFIG_VT
++ if (!console_use_vt)
++ goto out_vt;
+ cdev_init(&vc0_cdev, &console_fops);
+ if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
+ register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
+@@ -3736,6 +3740,7 @@ static int __init tty_init(void)
+ device_create_drvdata(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
+
+ vty_init();
++ out_vt:
+ #endif
+ return 0;
+ }
+--- a/include/linux/console.h
++++ b/include/linux/console.h
+@@ -63,6 +63,7 @@ extern const struct consw dummy_con; /*
+ extern const struct consw vga_con; /* VGA text console */
+ extern const struct consw newport_con; /* SGI Newport console */
+ extern const struct consw prom_con; /* SPARC PROM console */
++extern int console_use_vt;
+
+ int con_is_bound(const struct consw *csw);
+ int register_con_driver(const struct consw *csw, int first, int last);
--- /dev/null
+Subject: kexec: Move asm segment handling code to the assembly file (i386)
+From: http://xenbits.xensource.com/xen-unstable.hg (tip 13816)
+Patch-mainline: obsolete
+
+This patch moves the idt, gdt, and segment handling code from machine_kexec.c
+to relocate_kernel.S. The main reason behind this move is to avoid code
+duplication in the Xen hypervisor. With this patch all code required to kexec
+is put on the control page.
+
+On top of that this patch also counts as a cleanup - I think it is much
+nicer to write assembly directly in assembly files than wrap inline assembly
+in C functions for no apparent reason.
+
+Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
+Acked-by: jbeulich@novell.com
+---
+
+ Applies to 2.6.19-rc1.
+
+ machine_kexec.c | 59 -----------------------------------------------------
+ relocate_kernel.S | 58 +++++++++++++++++++++++++++++++++++++++++++++++-----
+ 2 files changed, 53 insertions(+), 64 deletions(-)
+
+Index: head-2008-11-17/arch/x86/kernel/machine_kexec_32.c
+===================================================================
+--- head-2008-11-17.orig/arch/x86/kernel/machine_kexec_32.c 2008-11-17 13:15:56.000000000 +0100
++++ head-2008-11-17/arch/x86/kernel/machine_kexec_32.c 2008-11-17 13:38:03.000000000 +0100
+@@ -34,48 +34,6 @@ static u32 kexec_pmd1[1024] PAGE_ALIGNED
+ static u32 kexec_pte0[1024] PAGE_ALIGNED;
+ static u32 kexec_pte1[1024] PAGE_ALIGNED;
+
+-static void set_idt(void *newidt, __u16 limit)
+-{
+- struct desc_ptr curidt;
+-
+- /* ia32 supports unaliged loads & stores */
+- curidt.size = limit;
+- curidt.address = (unsigned long)newidt;
+-
+- load_idt(&curidt);
+-}
+-
+-
+-static void set_gdt(void *newgdt, __u16 limit)
+-{
+- struct desc_ptr curgdt;
+-
+- /* ia32 supports unaligned loads & stores */
+- curgdt.size = limit;
+- curgdt.address = (unsigned long)newgdt;
+-
+- load_gdt(&curgdt);
+-}
+-
+-static void load_segments(void)
+-{
+-#define __STR(X) #X
+-#define STR(X) __STR(X)
+-
+- __asm__ __volatile__ (
+- "\tljmp $"STR(__KERNEL_CS)",$1f\n"
+- "\t1:\n"
+- "\tmovl $"STR(__KERNEL_DS)",%%eax\n"
+- "\tmovl %%eax,%%ds\n"
+- "\tmovl %%eax,%%es\n"
+- "\tmovl %%eax,%%fs\n"
+- "\tmovl %%eax,%%gs\n"
+- "\tmovl %%eax,%%ss\n"
+- ::: "eax", "memory");
+-#undef STR
+-#undef __STR
+-}
+-
+ /*
+ * A architecture hook called to validate the
+ * proposed image and prepare the control pages
+@@ -167,23 +125,6 @@ void machine_kexec(struct kimage *image)
+ page_list[PA_SWAP_PAGE] = (page_to_pfn(image->swap_page)
+ << PAGE_SHIFT);
+
+- /* The segment registers are funny things, they have both a
+- * visible and an invisible part. Whenever the visible part is
+- * set to a specific selector, the invisible part is loaded
+- * with from a table in memory. At no other time is the
+- * descriptor table in memory accessed.
+- *
+- * I take advantage of this here by force loading the
+- * segments, before I zap the gdt with an invalid value.
+- */
+- load_segments();
+- /* The gdt & idt are now invalid.
+- * If you want to load them you must set up your own idt & gdt.
+- */
+- set_gdt(phys_to_virt(0),0);
+- set_idt(phys_to_virt(0),0);
+-
+- /* now call it */
+ image->start = relocate_kernel_ptr((unsigned long)image->head,
+ (unsigned long)page_list,
+ image->start, cpu_has_pae,
+Index: head-2008-11-17/arch/x86/kernel/relocate_kernel_32.S
+===================================================================
+--- head-2008-11-17.orig/arch/x86/kernel/relocate_kernel_32.S 2008-11-17 13:15:56.000000000 +0100
++++ head-2008-11-17/arch/x86/kernel/relocate_kernel_32.S 2008-11-17 13:38:03.000000000 +0100
+@@ -199,14 +199,45 @@ relocate_new_kernel:
+ movl PTR(PA_PGD)(%ebp), %eax
+ movl %eax, %cr3
+
++ /* setup idt */
++ movl %edi, %eax
++ addl $(idt_48 - relocate_kernel), %eax
++ lidtl (%eax)
++
++ /* setup gdt */
++ movl %edi, %eax
++ addl $(gdt - relocate_kernel), %eax
++ movl %edi, %esi
++ addl $((gdt_48 - relocate_kernel) + 2), %esi
++ movl %eax, (%esi)
++
++ movl %edi, %eax
++ addl $(gdt_48 - relocate_kernel), %eax
++ lgdtl (%eax)
++
++ /* setup data segment registers */
++ mov $(gdt_ds - gdt), %eax
++ mov %eax, %ds
++ mov %eax, %es
++ mov %eax, %fs
++ mov %eax, %gs
++ mov %eax, %ss
++
+ /* setup a new stack at the end of the physical control page */
+ lea PAGE_SIZE(%edi), %esp
+
+- /* jump to identity mapped page */
+- movl %edi, %eax
+- addl $(identity_mapped - relocate_kernel), %eax
+- pushl %eax
+- ret
++ /* load new code segment and jump to identity mapped page */
++ movl %edi, %esi
++ xorl %eax, %eax
++ pushl %eax
++ pushl %esi
++ pushl %eax
++ movl $(gdt_cs - gdt), %eax
++ pushl %eax
++ movl %edi, %eax
++ addl $(identity_mapped - relocate_kernel),%eax
++ pushl %eax
++ iretl
+
+ identity_mapped:
+ /* store the start address on the stack */
+@@ -378,5 +409,22 @@ swap_pages:
+ popl %ebp
+ ret
+
++ .align 16
++gdt:
++ .quad 0x0000000000000000 /* NULL descriptor */
++gdt_cs:
++ .quad 0x00cf9a000000ffff /* kernel 4GB code at 0x00000000 */
++gdt_ds:
++ .quad 0x00cf92000000ffff /* kernel 4GB data at 0x00000000 */
++gdt_end:
++
++gdt_48:
++ .word gdt_end - gdt - 1 /* limit */
++ .long 0 /* base - filled in by code above */
++
++idt_48:
++ .word 0 /* limit */
++ .long 0 /* base */
++
+ .globl kexec_control_code_size
+ .set kexec_control_code_size, . - relocate_kernel
--- /dev/null
+Subject: kexec: Move asm segment handling code to the assembly file (x86_64)
+From: http://xenbits.xensource.com/xen-unstable.hg (tip 13816)
+Patch-mainline: obsolete
+
+This patch moves the idt, gdt, and segment handling code from machine_kexec.c
+to relocate_kernel.S. The main reason behind this move is to avoid code
+duplication in the Xen hypervisor. With this patch all code required to kexec
+is put on the control page.
+
+On top of that this patch also counts as a cleanup - I think it is much
+nicer to write assembly directly in assembly files than wrap inline assembly
+in C functions for no apparent reason.
+
+Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
+Acked-by: jbeulich@novell.com
+---
+
+ Applies to 2.6.19-rc1.
+
+ machine_kexec.c | 58 -----------------------------------------------------
+ relocate_kernel.S | 50 +++++++++++++++++++++++++++++++++++++++++----
+ 2 files changed, 45 insertions(+), 63 deletions(-)
+
+Index: head-2008-08-18/arch/x86/kernel/machine_kexec_64.c
+===================================================================
+--- head-2008-08-18.orig/arch/x86/kernel/machine_kexec_64.c 2008-08-18 09:05:04.000000000 +0200
++++ head-2008-08-18/arch/x86/kernel/machine_kexec_64.c 2008-08-18 10:13:08.000000000 +0200
+@@ -115,47 +115,6 @@ static int init_pgtable(struct kimage *i
+ return init_level4_page(image, level4p, 0, max_pfn << PAGE_SHIFT);
+ }
+
+-static void set_idt(void *newidt, u16 limit)
+-{
+- struct desc_ptr curidt;
+-
+- /* x86-64 supports unaliged loads & stores */
+- curidt.size = limit;
+- curidt.address = (unsigned long)newidt;
+-
+- __asm__ __volatile__ (
+- "lidtq %0\n"
+- : : "m" (curidt)
+- );
+-};
+-
+-
+-static void set_gdt(void *newgdt, u16 limit)
+-{
+- struct desc_ptr curgdt;
+-
+- /* x86-64 supports unaligned loads & stores */
+- curgdt.size = limit;
+- curgdt.address = (unsigned long)newgdt;
+-
+- __asm__ __volatile__ (
+- "lgdtq %0\n"
+- : : "m" (curgdt)
+- );
+-};
+-
+-static void load_segments(void)
+-{
+- __asm__ __volatile__ (
+- "\tmovl %0,%%ds\n"
+- "\tmovl %0,%%es\n"
+- "\tmovl %0,%%ss\n"
+- "\tmovl %0,%%fs\n"
+- "\tmovl %0,%%gs\n"
+- : : "a" (__KERNEL_DS) : "memory"
+- );
+-}
+-
+ int machine_kexec_prepare(struct kimage *image)
+ {
+ unsigned long start_pgtable;
+@@ -214,23 +173,6 @@ void machine_kexec(struct kimage *image)
+ page_list[PA_TABLE_PAGE] =
+ (unsigned long)__pa(page_address(image->control_code_page));
+
+- /* The segment registers are funny things, they have both a
+- * visible and an invisible part. Whenever the visible part is
+- * set to a specific selector, the invisible part is loaded
+- * with from a table in memory. At no other time is the
+- * descriptor table in memory accessed.
+- *
+- * I take advantage of this here by force loading the
+- * segments, before I zap the gdt with an invalid value.
+- */
+- load_segments();
+- /* The gdt & idt are now invalid.
+- * If you want to load them you must set up your own idt & gdt.
+- */
+- set_gdt(phys_to_virt(0),0);
+- set_idt(phys_to_virt(0),0);
+-
+- /* now call it */
+ relocate_kernel((unsigned long)image->head, (unsigned long)page_list,
+ image->start);
+ }
+Index: head-2008-08-18/arch/x86/kernel/relocate_kernel_64.S
+===================================================================
+--- head-2008-08-18.orig/arch/x86/kernel/relocate_kernel_64.S 2008-07-13 23:51:29.000000000 +0200
++++ head-2008-08-18/arch/x86/kernel/relocate_kernel_64.S 2008-08-18 10:13:08.000000000 +0200
+@@ -160,13 +160,39 @@ relocate_new_kernel:
+ movq PTR(PA_PGD)(%rsi), %r9
+ movq %r9, %cr3
+
++ /* setup idt */
++ movq %r8, %rax
++ addq $(idt_80 - relocate_kernel), %rax
++ lidtq (%rax)
++
++ /* setup gdt */
++ movq %r8, %rax
++ addq $(gdt - relocate_kernel), %rax
++ movq %r8, %r9
++ addq $((gdt_80 - relocate_kernel) + 2), %r9
++ movq %rax, (%r9)
++
++ movq %r8, %rax
++ addq $(gdt_80 - relocate_kernel), %rax
++ lgdtq (%rax)
++
++ /* setup data segment registers */
++ xorl %eax, %eax
++ movl %eax, %ds
++ movl %eax, %es
++ movl %eax, %fs
++ movl %eax, %gs
++ movl %eax, %ss
++
+ /* setup a new stack at the end of the physical control page */
+ lea PAGE_SIZE(%r8), %rsp
+
+- /* jump to identity mapped page */
+- addq $(identity_mapped - relocate_kernel), %r8
+- pushq %r8
+- ret
++ /* load new code segment and jump to identity mapped page */
++ movq %r8, %rax
++ addq $(identity_mapped - relocate_kernel), %rax
++ pushq $(gdt_cs - gdt)
++ pushq %rax
++ lretq
+
+ identity_mapped:
+ /* store the start address on the stack */
+@@ -262,5 +288,19 @@ identity_mapped:
+ xorq %r13, %r13
+ xorq %r14, %r14
+ xorq %r15, %r15
+-
+ ret
++
++ .align 16
++gdt:
++ .quad 0x0000000000000000 /* NULL descriptor */
++gdt_cs:
++ .quad 0x00af9a000000ffff
++gdt_end:
++
++gdt_80:
++ .word gdt_end - gdt - 1 /* limit */
++ .quad 0 /* base - filled in by code above */
++
++idt_80:
++ .word 0 /* limit */
++ .quad 0 /* base */
--- /dev/null
+From: Olaf Kirch <okir@suse.de>
+Subject: Allow to bring up network interface w/o ipv6 autoconf
+References: 161888
+
+When bringing up a xen bridge device, it will always be configured to
+use a MAC address of ff:ff:ff:ff:ff:fe. This greatly confuses IPv6 DAD,
+which starts logging lots and lots of useless messages to syslog.
+
+We really want to disable IPv6 on these interfaces, and there doesn't
+seem to be a reliable way to do this without bringing the interface
+up first (and triggering IPv6 autoconf).
+
+This patch makes autoconf (DAD and router discovery) depend on the
+interface's ability to do multicast. Turning off multicast for an
+interface before bringing it up will suppress autoconfiguration.
+
+ net/ipv6/addrconf.c | 2 ++
+ 1 files changed, 2 insertions(+)
+
+Index: head-2008-09-25/net/ipv6/addrconf.c
+===================================================================
+--- head-2008-09-25.orig/net/ipv6/addrconf.c 2008-09-25 13:56:12.000000000 +0200
++++ head-2008-09-25/net/ipv6/addrconf.c 2008-09-25 14:15:19.000000000 +0200
+@@ -2781,6 +2781,7 @@ static void addrconf_dad_start(struct in
+ spin_lock_bh(&ifp->lock);
+
+ if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
++ !(dev->flags&IFF_MULTICAST) ||
+ idev->cnf.accept_dad < 1 ||
+ !(ifp->flags&IFA_F_TENTATIVE) ||
+ ifp->flags & IFA_F_NODAD) {
+@@ -2878,6 +2879,7 @@ static void addrconf_dad_completed(struc
+ if (ifp->idev->cnf.forwarding == 0 &&
+ ifp->idev->cnf.rtr_solicits > 0 &&
+ (dev->flags&IFF_LOOPBACK) == 0 &&
++ (dev->flags & IFF_MULTICAST) &&
+ (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
+ /*
+ * If a host as already performed a random delay
--- /dev/null
+Subject: xen/dom0: Reassign memory resources to device for pci passthrough
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 745:2268be46c75e)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-12-01/drivers/pci/Makefile
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/Makefile 2008-12-01 10:53:15.000000000 +0100
++++ head-2008-12-01/drivers/pci/Makefile 2008-10-21 13:09:46.000000000 +0200
+@@ -4,6 +4,7 @@
+
+ obj-y += access.o bus.o probe.o remove.o pci.o quirks.o slot.o \
+ pci-driver.o search.o pci-sysfs.o rom.o setup-res.o
++obj-$(CONFIG_PCI_REASSIGN) += reassigndev.o
+ obj-$(CONFIG_PROC_FS) += proc.o
+
+ # Build PCI Express stuff if needed
+Index: head-2008-12-01/drivers/pci/pci.h
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/pci.h 2008-12-01 10:53:15.000000000 +0100
++++ head-2008-12-01/drivers/pci/pci.h 2008-10-21 13:09:01.000000000 +0200
+@@ -144,3 +144,9 @@ struct pci_slot_attribute {
+ };
+ #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
+
++#ifdef CONFIG_PCI_REASSIGN
++extern int is_reassigndev(struct pci_dev *dev);
++extern void pci_disable_bridge_window(struct pci_dev *dev);
++#else
++#define is_reassigndev(dev) 0
++#endif
+Index: head-2008-12-01/drivers/pci/quirks.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/quirks.c 2008-12-01 10:53:15.000000000 +0100
++++ head-2008-12-01/drivers/pci/quirks.c 2008-10-29 10:52:40.000000000 +0100
+@@ -24,6 +24,54 @@
+ #include <linux/kallsyms.h>
+ #include "pci.h"
+
++#ifdef CONFIG_PCI_REASSIGN
++/*
++ * This quirk function disables the device and releases resources
++ * which is specified by kernel's boot parameter 'reassigndev'.
++ * Later on, kernel will assign page-aligned memory resource back
++ * to that device.
++ */
++static void __devinit quirk_release_resources(struct pci_dev *dev)
++{
++ int i;
++ struct resource *r;
++
++ if (is_reassigndev(dev)) {
++ if (dev->hdr_type == PCI_HEADER_TYPE_NORMAL &&
++ (dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) {
++ /* PCI Host Bridge isn't a target device */
++ return;
++ }
++ printk(KERN_INFO
++ "PCI: Disable device and release resources [%s].\n",
++ pci_name(dev));
++ pci_disable_device(dev);
++
++ for (i=0; i < PCI_NUM_RESOURCES; i++) {
++ r = &dev->resource[i];
++ if (!(r->flags & IORESOURCE_MEM))
++ continue;
++
++ r->end = r->end - r->start;
++ r->start = 0;
++
++ if (i < PCI_BRIDGE_RESOURCES) {
++ pci_update_resource(dev, r, i);
++ }
++ }
++ /* need to disable bridge's resource window,
++ * to make kernel enable to reassign new resource
++ * window later on.
++ */
++ if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
++ (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
++ pci_disable_bridge_window(dev);
++ }
++ }
++}
++DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_release_resources);
++#endif
++
+ /* The Mellanox Tavor device gives false positive parity errors
+ * Mark this device with a broken_parity_status, to allow
+ * PCI scanning code to "skip" this now blacklisted device.
+Index: head-2008-12-01/drivers/pci/reassigndev.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/drivers/pci/reassigndev.c 2008-10-21 13:13:38.000000000 +0200
+@@ -0,0 +1,80 @@
++/*
++ * Copyright (c) 2008, NEC Corporation.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms and conditions of the GNU General Public License,
++ * version 2, as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope it will be useful, but WITHOUT
++ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
++ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
++ * more details.
++ *
++ * You should have received a copy of the GNU General Public License along with
++ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
++ * Place - Suite 330, Boston, MA 02111-1307 USA.
++ */
++
++#include <linux/kernel.h>
++#include <linux/pci.h>
++#include <linux/string.h>
++#include "pci.h"
++
++
++#define REASSIGNDEV_PARAM_MAX (2048)
++#define TOKEN_MAX (12) /* "SSSS:BB:DD.F" length is 12 */
++
++static char param_reassigndev[REASSIGNDEV_PARAM_MAX] = {0};
++
++static int __init reassigndev_setup(char *str)
++{
++ strncpy(param_reassigndev, str, REASSIGNDEV_PARAM_MAX);
++ param_reassigndev[REASSIGNDEV_PARAM_MAX - 1] = '\0';
++ return 1;
++}
++__setup("reassigndev=", reassigndev_setup);
++
++int is_reassigndev(struct pci_dev *dev)
++{
++ char dev_str[TOKEN_MAX+1];
++ int seg, bus, slot, func;
++ int len;
++ char *p, *next_str;
++
++ p = param_reassigndev;
++ for (; p; p = next_str + 1) {
++ next_str = strpbrk(p, ",");
++ if (next_str) {
++ len = next_str - p;
++ } else {
++ len = strlen(p);
++ }
++ if (len > 0 && len <= TOKEN_MAX) {
++ strncpy(dev_str, p, len);
++ *(dev_str + len) = '\0';
++
++ if (sscanf(dev_str, "%x:%x:%x.%x",
++ &seg, &bus, &slot, &func) != 4) {
++ if (sscanf(dev_str, "%x:%x.%x",
++ &bus, &slot, &func) == 3) {
++ seg = 0;
++ } else {
++ /* failed to scan strings */
++ seg = -1;
++ bus = -1;
++ }
++ }
++ if (seg == pci_domain_nr(dev->bus) &&
++ bus == dev->bus->number &&
++ slot == PCI_SLOT(dev->devfn) &&
++ func == PCI_FUNC(dev->devfn)) {
++ /* It's a target device */
++ return 1;
++ }
++ }
++ if (!next_str)
++ break;
++ }
++
++ return 0;
++}
+Index: head-2008-12-01/drivers/pci/setup-bus.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/setup-bus.c 2008-12-01 10:53:15.000000000 +0100
++++ head-2008-12-01/drivers/pci/setup-bus.c 2008-10-21 13:09:01.000000000 +0200
+@@ -26,6 +26,7 @@
+ #include <linux/cache.h>
+ #include <linux/slab.h>
+
++#include "pci.h"
+
+ static void pbus_assign_resources_sorted(struct pci_bus *bus)
+ {
+@@ -343,7 +344,8 @@ static int pbus_size_mem(struct pci_bus
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ int i;
+-
++ int reassign = is_reassigndev(dev);
++
+ for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+ struct resource *r = &dev->resource[i];
+ resource_size_t r_size;
+@@ -351,6 +353,10 @@ static int pbus_size_mem(struct pci_bus
+ if (r->parent || (r->flags & mask) != type)
+ continue;
+ r_size = r->end - r->start + 1;
++
++ if ((i < PCI_BRIDGE_RESOURCES) && reassign)
++ r_size = ALIGN(r_size, PAGE_SIZE);
++
+ /* For bridges size != alignment */
+ align = resource_alignment(r);
+ order = __ffs(align) - 20;
+Index: head-2008-12-01/drivers/pci/setup-res.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/setup-res.c 2008-12-01 10:53:15.000000000 +0100
++++ head-2008-12-01/drivers/pci/setup-res.c 2008-12-01 11:10:02.000000000 +0100
+@@ -126,6 +126,21 @@ int pci_claim_resource(struct pci_dev *d
+ return err;
+ }
+
++#ifdef CONFIG_PCI_REASSIGN
++void pci_disable_bridge_window(struct pci_dev *dev)
++{
++ printk(KERN_DEBUG "PCI: Disable bridge window on %s\n", pci_name(dev));
++
++ /* MMIO Base/Limit */
++ pci_write_config_dword(dev, PCI_MEMORY_BASE, 0x0000fff0);
++
++ /* Prefetchable MMIO Base/Limit */
++ pci_write_config_dword(dev, PCI_PREF_LIMIT_UPPER32, 0);
++ pci_write_config_dword(dev, PCI_PREF_MEMORY_BASE, 0x0000fff0);
++ pci_write_config_dword(dev, PCI_PREF_BASE_UPPER32, 0xffffffff);
++}
++#endif
++
+ int pci_assign_resource(struct pci_dev *dev, int resno)
+ {
+ struct pci_bus *bus = dev->bus;
+@@ -144,6 +159,10 @@ int pci_assign_resource(struct pci_dev *
+ (unsigned long long)res->end, res->flags);
+ return -EINVAL;
+ }
++ if (resno < PCI_BRIDGE_RESOURCES
++ && is_reassigndev(dev)
++ && (res->flags & IORESOURCE_MEM))
++ align = ALIGN(align, PAGE_SIZE);
+
+ /* First, try exact prefetching match.. */
+ ret = pci_bus_alloc_resource(bus, res, size, align, min,
+@@ -169,8 +188,15 @@ int pci_assign_resource(struct pci_dev *
+ (unsigned long long)res->end);
+ } else {
+ res->flags &= ~IORESOURCE_STARTALIGN;
+- if (resno < PCI_BRIDGE_RESOURCES)
++ if (resno < PCI_BRIDGE_RESOURCES) {
++#ifdef CONFIG_PCI_REASSIGN
++ printk(KERN_DEBUG "PCI: Assign resource(%d) on %s "
++ "%016llx - %016llx\n", resno, pci_name(dev),
++ (unsigned long long)res->start,
++ (unsigned long long)res->end);
++#endif
+ pci_update_resource(dev, res, resno);
++ }
+ }
+
+ return ret;
+@@ -208,6 +234,12 @@ int pci_assign_resource_fixed(struct pci
+ (unsigned long long)res->start,
+ (unsigned long long)res->end);
+ } else if (resno < PCI_BRIDGE_RESOURCES) {
++#ifdef CONFIG_PCI_REASSIGN
++ printk(KERN_DEBUG "PCI: Assign resource(%d) on %s "
++ "%016llx - %016llx\n", resno, pci_name(dev),
++ (unsigned long long)res->start,
++ (unsigned long long)res->end);
++#endif
+ pci_update_resource(dev, res, resno);
+ }
+
+@@ -220,6 +252,7 @@ EXPORT_SYMBOL_GPL(pci_assign_resource_fi
+ void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head)
+ {
+ int i;
++ int reassigndev = is_reassigndev(dev);
+
+ for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+ struct resource *r;
+@@ -242,12 +275,22 @@ void pdev_sort_resources(struct pci_dev
+ (unsigned long long)r->end, r->flags);
+ continue;
+ }
++ if (i < PCI_BRIDGE_RESOURCES && (r->flags & IORESOURCE_MEM) &&
++ reassigndev)
++ r_align = ALIGN(r_align, PAGE_SIZE);
++
+ for (list = head; ; list = list->next) {
+ resource_size_t align = 0;
+ struct resource_list *ln = list->next;
+
+- if (ln)
++ if (ln) {
+ align = resource_alignment(ln->res);
++ if (ln->res - ln->dev->resource <
++ PCI_BRIDGE_RESOURCES &&
++ (ln->res->flags & IORESOURCE_MEM) &&
++ is_reassigndev(ln->dev))
++ align = ALIGN(align, PAGE_SIZE);
++ }
+
+ if (r_align > align) {
+ tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
--- /dev/null
+From: David Riddoch <driddoch@solarflare.com>
+commit d96c061bfd1839e34e136de0555564520acc97af
+Author: Steve Hodgson <shodgson@solarflare.com>
+Date: Mon Jul 14 15:38:47 2008 +0100
+
+Subject: sfc: Driverlink API for exporting hardware features to client drivers
+
+References: FATE#303479
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-08-18/drivers/net/sfc/Makefile
+===================================================================
+--- head-2008-08-18.orig/drivers/net/sfc/Makefile 2008-08-18 10:16:43.000000000 +0200
++++ head-2008-08-18/drivers/net/sfc/Makefile 2008-08-18 10:16:46.000000000 +0200
+@@ -1,5 +1,5 @@
+ sfc-y += efx.o falcon.o tx.o rx.o falcon_xmac.o \
+ selftest.o ethtool.o xfp_phy.o \
+- mdio_10g.o tenxpress.o boards.o sfe4001.o
+-
++ mdio_10g.o tenxpress.o boards.o sfe4001.o \
++ driverlink.o
+ obj-$(CONFIG_SFC) += sfc.o
+Index: head-2008-08-18/drivers/net/sfc/driverlink.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-08-18/drivers/net/sfc/driverlink.c 2008-08-18 10:16:46.000000000 +0200
+@@ -0,0 +1,367 @@
++/****************************************************************************
++ * Driver for Solarflare Solarstorm network controllers and boards
++ * Copyright 2005 Fen Systems Ltd.
++ * Copyright 2005-2008 Solarflare Communications Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ */
++
++#include <linux/module.h>
++#include <linux/list.h>
++#include <linux/skbuff.h>
++#include <linux/rtnetlink.h>
++#include "net_driver.h"
++#include "efx.h"
++#include "driverlink_api.h"
++#include "driverlink.h"
++
++/* Protects @efx_driverlink_lock and @efx_driver_list */
++static DEFINE_MUTEX(efx_driverlink_lock);
++
++/* List of all registered drivers */
++static LIST_HEAD(efx_driver_list);
++
++/* List of all registered Efx ports */
++static LIST_HEAD(efx_port_list);
++
++/**
++ * Driver link handle used internally to track devices
++ * @efx_dev: driverlink device handle exported to consumers
++ * @efx: efx_nic backing the driverlink device
++ * @port_node: per-device list head
++ * @driver_node: per-driver list head
++ */
++struct efx_dl_handle {
++ struct efx_dl_device efx_dev;
++ struct efx_nic *efx;
++ struct list_head port_node;
++ struct list_head driver_node;
++};
++
++static struct efx_dl_handle *efx_dl_handle(struct efx_dl_device *efx_dev)
++{
++ return container_of(efx_dev, struct efx_dl_handle, efx_dev);
++}
++
++/* Remove an Efx device, and call the driver's remove() callback if
++ * present. The caller must hold @efx_driverlink_lock. */
++static void efx_dl_del_device(struct efx_dl_device *efx_dev)
++{
++ struct efx_dl_handle *efx_handle = efx_dl_handle(efx_dev);
++
++ EFX_INFO(efx_handle->efx, "%s driverlink client unregistering\n",
++ efx_dev->driver->name);
++
++ if (efx_dev->driver->remove)
++ efx_dev->driver->remove(efx_dev);
++
++ list_del(&efx_handle->driver_node);
++ list_del(&efx_handle->port_node);
++
++ kfree(efx_handle);
++}
++
++/* Attempt to probe the given device with the driver, creating a
++ * new &struct efx_dl_device. If the probe routine returns an error,
++ * then the &struct efx_dl_device is destroyed */
++static void efx_dl_try_add_device(struct efx_nic *efx,
++ struct efx_dl_driver *driver)
++{
++ struct efx_dl_handle *efx_handle;
++ struct efx_dl_device *efx_dev;
++ int rc;
++
++ efx_handle = kzalloc(sizeof(*efx_handle), GFP_KERNEL);
++ if (!efx_handle)
++ goto fail;
++ efx_dev = &efx_handle->efx_dev;
++ efx_handle->efx = efx;
++ efx_dev->driver = driver;
++ efx_dev->pci_dev = efx->pci_dev;
++ INIT_LIST_HEAD(&efx_handle->port_node);
++ INIT_LIST_HEAD(&efx_handle->driver_node);
++
++ rc = driver->probe(efx_dev, efx->net_dev,
++ efx->dl_info, efx->silicon_rev);
++ if (rc)
++ goto fail;
++
++ list_add_tail(&efx_handle->driver_node, &driver->device_list);
++ list_add_tail(&efx_handle->port_node, &efx->dl_device_list);
++
++ EFX_INFO(efx, "%s driverlink client registered\n", driver->name);
++ return;
++
++ fail:
++ EFX_INFO(efx, "%s driverlink client skipped\n", driver->name);
++
++ kfree(efx_handle);
++}
++
++/* Unregister a driver from the driverlink layer, calling the
++ * driver's remove() callback for every attached device */
++void efx_dl_unregister_driver(struct efx_dl_driver *driver)
++{
++ struct efx_dl_handle *efx_handle, *efx_handle_n;
++
++ printk(KERN_INFO "Efx driverlink unregistering %s driver\n",
++ driver->name);
++
++ mutex_lock(&efx_driverlink_lock);
++
++ list_for_each_entry_safe(efx_handle, efx_handle_n,
++ &driver->device_list, driver_node)
++ efx_dl_del_device(&efx_handle->efx_dev);
++
++ list_del(&driver->node);
++
++ mutex_unlock(&efx_driverlink_lock);
++}
++EXPORT_SYMBOL(efx_dl_unregister_driver);
++
++/* Register a new driver with the driverlink layer. The driver's
++ * probe routine will be called for every attached nic. */
++int efx_dl_register_driver(struct efx_dl_driver *driver)
++{
++ struct efx_nic *efx;
++ int rc;
++
++ printk(KERN_INFO "Efx driverlink registering %s driver\n",
++ driver->name);
++
++ INIT_LIST_HEAD(&driver->node);
++ INIT_LIST_HEAD(&driver->device_list);
++
++ rc = mutex_lock_interruptible(&efx_driverlink_lock);
++ if (rc)
++ return rc;
++
++ list_add_tail(&driver->node, &efx_driver_list);
++ list_for_each_entry(efx, &efx_port_list, dl_node)
++ efx_dl_try_add_device(efx, driver);
++
++ mutex_unlock(&efx_driverlink_lock);
++
++ return 0;
++}
++EXPORT_SYMBOL(efx_dl_register_driver);
++
++void efx_dl_unregister_nic(struct efx_nic *efx)
++{
++ struct efx_dl_handle *efx_handle, *efx_handle_n;
++
++ mutex_lock(&efx_driverlink_lock);
++
++ list_for_each_entry_safe_reverse(efx_handle, efx_handle_n,
++ &efx->dl_device_list,
++ port_node)
++ efx_dl_del_device(&efx_handle->efx_dev);
++
++ list_del(&efx->dl_node);
++
++ mutex_unlock(&efx_driverlink_lock);
++}
++
++int efx_dl_register_nic(struct efx_nic *efx)
++{
++ struct efx_dl_driver *driver;
++ int rc;
++
++ rc = mutex_lock_interruptible(&efx_driverlink_lock);
++ if (rc)
++ return rc;
++
++ list_add_tail(&efx->dl_node, &efx_port_list);
++ list_for_each_entry(driver, &efx_driver_list, node)
++ efx_dl_try_add_device(efx, driver);
++
++ mutex_unlock(&efx_driverlink_lock);
++
++ return 0;
++}
++
++/* Dummy callback implementations.
++ * To avoid a branch point on the fast-path, the callbacks are always
++ * implemented - they are never NULL.
++ */
++static enum efx_veto efx_dummy_tx_packet_callback(struct efx_dl_device *efx_dev,
++ struct sk_buff *skb)
++{
++ return EFX_ALLOW_PACKET;
++}
++
++static enum efx_veto efx_dummy_rx_packet_callback(struct efx_dl_device *efx_dev,
++ const char *pkt_buf, int len)
++{
++ return EFX_ALLOW_PACKET;
++}
++
++static int efx_dummy_request_mtu_callback(struct efx_dl_device *efx_dev,
++ int new_mtu)
++{
++ return 0;
++}
++
++static void efx_dummy_mtu_changed_callback(struct efx_dl_device *efx_dev,
++ int mtu)
++{
++ return;
++}
++
++static void efx_dummy_event_callback(struct efx_dl_device *efx_dev, void *event)
++{
++ return;
++}
++
++struct efx_dl_callbacks efx_default_callbacks = {
++ .tx_packet = efx_dummy_tx_packet_callback,
++ .rx_packet = efx_dummy_rx_packet_callback,
++ .request_mtu = efx_dummy_request_mtu_callback,
++ .mtu_changed = efx_dummy_mtu_changed_callback,
++ .event = efx_dummy_event_callback,
++};
++
++void efx_dl_unregister_callbacks(struct efx_dl_device *efx_dev,
++ struct efx_dl_callbacks *callbacks)
++{
++ struct efx_dl_handle *efx_handle = efx_dl_handle(efx_dev);
++ struct efx_nic *efx = efx_handle->efx;
++
++ efx_suspend(efx);
++
++ EFX_INFO(efx, "removing callback hooks into %s driver\n",
++ efx_dev->driver->name);
++
++ if (callbacks->tx_packet) {
++ BUG_ON(efx->dl_cb_dev.tx_packet != efx_dev);
++ efx->dl_cb.tx_packet = efx_default_callbacks.tx_packet;
++ efx->dl_cb_dev.tx_packet = NULL;
++ }
++ if (callbacks->rx_packet) {
++ BUG_ON(efx->dl_cb_dev.rx_packet != efx_dev);
++ efx->dl_cb.rx_packet = efx_default_callbacks.rx_packet;
++ efx->dl_cb_dev.rx_packet = NULL;
++ }
++ if (callbacks->request_mtu) {
++ BUG_ON(efx->dl_cb_dev.request_mtu != efx_dev);
++ efx->dl_cb.request_mtu = efx_default_callbacks.request_mtu;
++ efx->dl_cb_dev.request_mtu = NULL;
++ }
++ if (callbacks->mtu_changed) {
++ BUG_ON(efx->dl_cb_dev.mtu_changed != efx_dev);
++ efx->dl_cb.mtu_changed = efx_default_callbacks.mtu_changed;
++ efx->dl_cb_dev.mtu_changed = NULL;
++ }
++ if (callbacks->event) {
++ BUG_ON(efx->dl_cb_dev.event != efx_dev);
++ efx->dl_cb.event = efx_default_callbacks.event;
++ efx->dl_cb_dev.event = NULL;
++ }
++
++ efx_resume(efx);
++}
++EXPORT_SYMBOL(efx_dl_unregister_callbacks);
++
++int efx_dl_register_callbacks(struct efx_dl_device *efx_dev,
++ struct efx_dl_callbacks *callbacks)
++{
++ struct efx_dl_handle *efx_handle = efx_dl_handle(efx_dev);
++ struct efx_nic *efx = efx_handle->efx;
++ int rc = 0;
++
++ efx_suspend(efx);
++
++ /* Check that the requested callbacks are not already hooked. */
++ if ((callbacks->tx_packet && efx->dl_cb_dev.tx_packet) ||
++ (callbacks->rx_packet && efx->dl_cb_dev.rx_packet) ||
++ (callbacks->request_mtu && efx->dl_cb_dev.request_mtu) ||
++ (callbacks->mtu_changed && efx->dl_cb_dev.mtu_changed) ||
++ (callbacks->event && efx->dl_cb_dev.event)) {
++ rc = -EBUSY;
++ goto out;
++ }
++
++ EFX_INFO(efx, "adding callback hooks to %s driver\n",
++ efx_dev->driver->name);
++
++ /* Hook in the requested callbacks, leaving any NULL members
++ * referencing the members of @efx_default_callbacks */
++ if (callbacks->tx_packet) {
++ efx->dl_cb.tx_packet = callbacks->tx_packet;
++ efx->dl_cb_dev.tx_packet = efx_dev;
++ }
++ if (callbacks->rx_packet) {
++ efx->dl_cb.rx_packet = callbacks->rx_packet;
++ efx->dl_cb_dev.rx_packet = efx_dev;
++ }
++ if (callbacks->request_mtu) {
++ efx->dl_cb.request_mtu = callbacks->request_mtu;
++ efx->dl_cb_dev.request_mtu = efx_dev;
++ }
++ if (callbacks->mtu_changed) {
++ efx->dl_cb.mtu_changed = callbacks->mtu_changed;
++ efx->dl_cb_dev.mtu_changed = efx_dev;
++ }
++ if (callbacks->event) {
++ efx->dl_cb.event = callbacks->event;
++ efx->dl_cb_dev.event = efx_dev;
++ }
++
++ out:
++ efx_resume(efx);
++
++ return rc;
++}
++EXPORT_SYMBOL(efx_dl_register_callbacks);
++
++void efx_dl_schedule_reset(struct efx_dl_device *efx_dev)
++{
++ struct efx_dl_handle *efx_handle = efx_dl_handle(efx_dev);
++ struct efx_nic *efx = efx_handle->efx;
++
++ efx_schedule_reset(efx, RESET_TYPE_ALL);
++}
++EXPORT_SYMBOL(efx_dl_schedule_reset);
++
++void efx_dl_reset_unlock(void)
++{
++ mutex_unlock(&efx_driverlink_lock);
++}
++
++/* Suspend ready for reset, serialising against all the driverlink interfacse
++ * and calling the suspend() callback of every registered driver */
++void efx_dl_reset_suspend(struct efx_nic *efx)
++{
++ struct efx_dl_handle *efx_handle;
++ struct efx_dl_device *efx_dev;
++
++ mutex_lock(&efx_driverlink_lock);
++
++ list_for_each_entry_reverse(efx_handle,
++ &efx->dl_device_list,
++ port_node) {
++ efx_dev = &efx_handle->efx_dev;
++ if (efx_dev->driver->reset_suspend)
++ efx_dev->driver->reset_suspend(efx_dev);
++ }
++}
++
++/* Resume after a reset, calling the resume() callback of every registered
++ * driver, and releasing @Efx_driverlink_lock acquired in
++ * efx_dl_reset_resume() */
++void efx_dl_reset_resume(struct efx_nic *efx, int ok)
++{
++ struct efx_dl_handle *efx_handle;
++ struct efx_dl_device *efx_dev;
++
++ list_for_each_entry(efx_handle, &efx->dl_device_list,
++ port_node) {
++ efx_dev = &efx_handle->efx_dev;
++ if (efx_dev->driver->reset_resume)
++ efx_dev->driver->reset_resume(efx_dev, ok);
++ }
++
++ mutex_unlock(&efx_driverlink_lock);
++}
+Index: head-2008-08-18/drivers/net/sfc/driverlink.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-08-18/drivers/net/sfc/driverlink.h 2008-08-18 10:16:46.000000000 +0200
+@@ -0,0 +1,43 @@
++/****************************************************************************
++ * Driver for Solarflare Solarstorm network controllers and boards
++ * Copyright 2005 Fen Systems Ltd.
++ * Copyright 2006-2008 Solarflare Communications Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ */
++
++#ifndef EFX_DRIVERLINK_H
++#define EFX_DRIVERLINK_H
++
++/* Forward declarations */
++struct efx_dl_device;
++struct efx_nic;
++
++/* Efx callback devices
++ *
++ * A list of the devices that own each callback. The partner to
++ * struct efx_dl_callbacks.
++ */
++struct efx_dl_cb_devices {
++ struct efx_dl_device *tx_packet;
++ struct efx_dl_device *rx_packet;
++ struct efx_dl_device *request_mtu;
++ struct efx_dl_device *mtu_changed;
++ struct efx_dl_device *event;
++};
++
++extern struct efx_dl_callbacks efx_default_callbacks;
++
++#define EFX_DL_CALLBACK(_port, _name, ...) \
++ (_port)->dl_cb._name((_port)->dl_cb_dev._name, __VA_ARGS__)
++
++extern int efx_dl_register_nic(struct efx_nic *efx);
++extern void efx_dl_unregister_nic(struct efx_nic *efx);
++
++/* Suspend and resume client drivers over a hardware reset */
++extern void efx_dl_reset_suspend(struct efx_nic *efx);
++extern void efx_dl_reset_resume(struct efx_nic *efx, int ok);
++
++#endif /* EFX_DRIVERLINK_H */
+Index: head-2008-08-18/drivers/net/sfc/driverlink_api.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-08-18/drivers/net/sfc/driverlink_api.h 2008-08-18 10:16:46.000000000 +0200
+@@ -0,0 +1,303 @@
++/****************************************************************************
++ * Driver for Solarflare Solarstorm network controllers and boards
++ * Copyright 2005-2006 Fen Systems Ltd.
++ * Copyright 2005-2008 Solarflare Communications Inc.
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ */
++
++#ifndef EFX_DRIVERLINK_API_H
++#define EFX_DRIVERLINK_API_H
++
++#include <linux/list.h>
++
++/* Forward declarations */
++struct pci_dev;
++struct net_device;
++struct sk_buff;
++struct efx_dl_device;
++struct efx_dl_device_info;
++
++/* An extra safeguard in addition to symbol versioning */
++#define EFX_DRIVERLINK_API_VERSION 2
++
++/**
++ * struct efx_dl_driver - An Efx driverlink device driver
++ *
++ * A driverlink client defines and initializes as many instances of
++ * efx_dl_driver as required, registering each one with
++ * efx_dl_register_driver().
++ *
++ * @name: Name of the driver
++ * @probe: Called when device added
++ * The client should use the @def_info linked list and @silicon_rev
++ * to determine if they wish to attach to this device.
++ * Context: process, driverlink semaphore held
++ * @remove: Called when device removed
++ * The client must ensure the finish all operations with this
++ * device before returning from this method.
++ * Context: process, driverlink semaphore held
++ * @reset_suspend: Called before device is reset
++ * Called immediately before a hardware reset. The client must stop all
++ * hardware processing before returning from this method. Callbacks will
++ * be inactive when this method is called.
++ * Context: process, driverlink semaphore held. rtnl_lock may be held
++ * @reset_resume: Called after device is reset
++ * Called after a hardware reset. If @ok is true, the client should
++ * state and resume normal operations. If @ok is false, the client should
++ * abandon use of the hardware resources. remove() will still be called.
++ * Context: process, driverlink semaphore held. rtnl_lock may be held
++ */
++struct efx_dl_driver {
++ const char *name;
++
++ int (*probe) (struct efx_dl_device *efx_dl_dev,
++ const struct net_device *net_dev,
++ const struct efx_dl_device_info *dev_info,
++ const char *silicon_rev);
++ void (*remove) (struct efx_dl_device *efx_dev);
++ void (*reset_suspend) (struct efx_dl_device *efx_dev);
++ void (*reset_resume) (struct efx_dl_device *efx_dev, int ok);
++
++/* private: */
++ struct list_head node;
++ struct list_head device_list;
++};
++
++/**
++ * enum efx_dl_device_info_type - Device information identifier.
++ *
++ * Used to identify each item in the &struct efx_dl_device_info linked list
++ * provided to each driverlink client in the probe() @dev_info member.
++ *
++ * @EFX_DL_FALCON_RESOURCES: Information type is &struct efx_dl_falcon_resources
++ */
++enum efx_dl_device_info_type {
++ /** Falcon resources available for export */
++ EFX_DL_FALCON_RESOURCES = 0,
++};
++
++/**
++ * struct efx_dl_device_info - device information structure
++ *
++ * @next: Link to next structure, if any
++ * @type: Type code for this structure
++ */
++struct efx_dl_device_info {
++ struct efx_dl_device_info *next;
++ enum efx_dl_device_info_type type;
++};
++
++/**
++ * enum efx_dl_falcon_resource_flags - Falcon resource information flags.
++ *
++ * Flags that describe hardware variations for the current Falcon device.
++ *
++ * @EFX_DL_FALCON_DUAL_FUNC: Port is dual-function.
++ * Certain silicon revisions have two pci functions, and require
++ * certain hardware resources to be accessed via the secondary
++ * function
++ * @EFX_DL_FALCON_USE_MSI: Port is initialised to use MSI/MSI-X interrupts.
++ * Falcon supports traditional legacy interrupts and MSI/MSI-X
++ * interrupts. The choice is made at run time by the sfc driver, and
++ * notified to the clients by this enumeration
++ */
++enum efx_dl_falcon_resource_flags {
++ EFX_DL_FALCON_DUAL_FUNC = 0x1,
++ EFX_DL_FALCON_USE_MSI = 0x2,
++};
++
++/**
++ * struct efx_dl_falcon_resources - Falcon resource information.
++ *
++ * This structure describes Falcon hardware resources available for
++ * use by a driverlink driver.
++ *
++ * @hdr: Resource linked list header
++ * @biu_lock: Register access lock.
++ * Some Falcon revisions require register access for configuration
++ * registers to be serialised between ports and PCI functions.
++ * The sfc driver will provide the appropriate lock semantics for
++ * the underlying hardware.
++ * @buffer_table_min: First available buffer table entry
++ * @buffer_table_lim: Last available buffer table entry + 1
++ * @evq_timer_min: First available event queue with timer
++ * @evq_timer_lim: Last available event queue with timer + 1
++ * @evq_int_min: First available event queue with interrupt
++ * @evq_int_lim: Last available event queue with interrupt + 1
++ * @rxq_min: First available RX queue
++ * @rxq_lim: Last available RX queue + 1
++ * @txq_min: First available TX queue
++ * @txq_lim: Last available TX queue + 1
++ * @flags: Hardware variation flags
++ */
++struct efx_dl_falcon_resources {
++ struct efx_dl_device_info hdr;
++ spinlock_t *biu_lock;
++ unsigned buffer_table_min;
++ unsigned buffer_table_lim;
++ unsigned evq_timer_min;
++ unsigned evq_timer_lim;
++ unsigned evq_int_min;
++ unsigned evq_int_lim;
++ unsigned rxq_min;
++ unsigned rxq_lim;
++ unsigned txq_min;
++ unsigned txq_lim;
++ enum efx_dl_falcon_resource_flags flags;
++};
++
++/**
++ * struct efx_dl_device - An Efx driverlink device.
++ *
++ * @pci_dev: PCI device used by the sfc driver.
++ * @priv: Driver private data
++ * Driverlink clients can use this to store a pointer to their
++ * internal per-device data structure. Each (driver, device)
++ * tuple has a separate &struct efx_dl_device, so clients can use
++ * this @priv field independently.
++ * @driver: Efx driverlink driver for this device
++ */
++struct efx_dl_device {
++ struct pci_dev *pci_dev;
++ void *priv;
++ struct efx_dl_driver *driver;
++};
++
++/**
++ * enum efx_veto - Packet veto request flag.
++ *
++ * This is the return type for the rx_packet() and tx_packet() methods
++ * in &struct efx_dl_callbacks.
++ *
++ * @EFX_ALLOW_PACKET: Packet may be transmitted/received
++ * @EFX_VETO_PACKET: Packet must not be transmitted/received
++ */
++enum efx_veto {
++ EFX_ALLOW_PACKET = 0,
++ EFX_VETO_PACKET = 1,
++};
++
++/**
++ * struct efx_dl_callbacks - Efx callbacks
++ *
++ * This is a tighly controlled set of simple callbacks, that are attached
++ * to the sfc driver via efx_dl_register_callbacks(). They export just enough
++ * state to allow clients to make use of the available hardware resources.
++ *
++ * For efficiency, only one client can hook each callback. Since these
++ * callbacks are called on packet transmit and reception paths, and the
++ * sfc driver may have multiple tx and rx queues per port, clients should
++ * avoid acquiring locks or allocating memory.
++ *
++ * @tx_packet: Called when packet is about to be transmitted
++ * Called for every packet about to be transmitted, providing means
++ * for the client to snoop traffic, and veto transmission by returning
++ * %EFX_VETO_PACKET (the sfc driver will subsequently free the skb).
++ * Context: tasklet, netif_tx_lock held
++ * @rx_packet: Called when packet is received
++ * Called for every received packet (after LRO), allowing the client
++ * to snoop every received packet (on every rx queue), and veto
++ * reception by returning %EFX_VETO_PACKET.
++ * Context: tasklet
++ * @request_mtu: Called to request MTU change.
++ * Called whenever the user requests the net_dev mtu to be changed.
++ * If the client returns an error, the mtu change is aborted. The sfc
++ * driver guarantees that no other callbacks are running.
++ * Context: process, rtnl_lock held.
++ * @mtu_changed: Called when MTU has been changed.
++ * Called after the mtu has been successfully changed, always after
++ * a previous call to request_mtu(). The sfc driver guarantees that no
++ * other callbacks are running.
++ * Context: process, rtnl_lock held.
++ * @event: Called when a hardware NIC event is not understood by the sfc driver.
++ * Context: tasklet.
++ */
++struct efx_dl_callbacks {
++ enum efx_veto (*tx_packet) (struct efx_dl_device *efx_dev,
++ struct sk_buff *skb);
++ enum efx_veto (*rx_packet) (struct efx_dl_device *efx_dev,
++ const char *pkt_hdr, int pkt_len);
++ int (*request_mtu) (struct efx_dl_device *efx_dev, int new_mtu);
++ void (*mtu_changed) (struct efx_dl_device *efx_dev, int mtu);
++ void (*event) (struct efx_dl_device *efx_dev, void *p_event);
++};
++
++/* Include API version number in symbol used for efx_dl_register_driver */
++#define efx_dl_stringify_1(x, y) x ## y
++#define efx_dl_stringify_2(x, y) efx_dl_stringify_1(x, y)
++#define efx_dl_register_driver \
++ efx_dl_stringify_2(efx_dl_register_driver_api_ver_, \
++ EFX_DRIVERLINK_API_VERSION)
++
++/* Exported driverlink api used to register and unregister the client driver
++ * and any callbacks [only one per port allowed], and to allow a client driver
++ * to request reset to recover from an error condition.
++ *
++ * All of these functions acquire the driverlink semaphore, so must not be
++ * called from an efx_dl_driver or efx_dl_callbacks member, and must be called
++ * from process context.
++ */
++extern int efx_dl_register_driver(struct efx_dl_driver *driver);
++
++extern void efx_dl_unregister_driver(struct efx_dl_driver *driver);
++
++extern int efx_dl_register_callbacks(struct efx_dl_device *efx_dev,
++ struct efx_dl_callbacks *callbacks);
++
++extern void efx_dl_unregister_callbacks(struct efx_dl_device *efx_dev,
++ struct efx_dl_callbacks *callbacks);
++
++/* Schedule a reset without grabbing any locks */
++extern void efx_dl_schedule_reset(struct efx_dl_device *efx_dev);
++
++/**
++ * efx_dl_for_each_device_info_matching - iterate an efx_dl_device_info list
++ * @_dev_info: Pointer to first &struct efx_dl_device_info
++ * @_type: Type code to look for
++ * @_info_type: Structure type corresponding to type code
++ * @_field: Name of &struct efx_dl_device_info field in the type
++ * @_p: Iterator variable
++ *
++ * Example:
++ * struct efx_dl_falcon_resources *res;
++ * efx_dl_for_each_device_info_matching(dev_info, EFX_DL_FALCON_RESOURCES,
++ * struct efx_dl_falcon_resources,
++ * hdr, res) {
++ * if (res->flags & EFX_DL_FALCON_DUAL_FUNC)
++ * ....
++ * }
++ */
++#define efx_dl_for_each_device_info_matching(_dev_info, _type, \
++ _info_type, _field, _p) \
++ for ((_p) = container_of((_dev_info), _info_type, _field); \
++ (_p) != NULL; \
++ (_p) = container_of((_p)->_field.next, _info_type, _field))\
++ if ((_p)->_field.type != _type) \
++ continue; \
++ else
++
++/**
++ * efx_dl_search_device_info - search an efx_dl_device_info list
++ * @_dev_info: Pointer to first &struct efx_dl_device_info
++ * @_type: Type code to look for
++ * @_info_type: Structure type corresponding to type code
++ * @_field: Name of &struct efx_dl_device_info member in this type
++ * @_p: Result variable
++ *
++ * Example:
++ * struct efx_dl_falcon_resources *res;
++ * efx_dl_search_device_info(dev_info, EFX_DL_FALCON_RESOURCES,
++ * struct efx_dl_falcon_resources, hdr, res);
++ * if (res)
++ * ....
++ */
++#define efx_dl_search_device_info(_dev_info, _type, _info_type, \
++ _field, _p) \
++ efx_dl_for_each_device_info_matching((_dev_info), (_type), \
++ _info_type, _field, (_p)) \
++ break;
++
++#endif /* EFX_DRIVERLINK_API_H */
+Index: head-2008-08-18/drivers/net/sfc/efx.c
+===================================================================
+--- head-2008-08-18.orig/drivers/net/sfc/efx.c 2008-08-18 10:16:43.000000000 +0200
++++ head-2008-08-18/drivers/net/sfc/efx.c 2008-08-18 10:16:46.000000000 +0200
+@@ -1427,6 +1427,11 @@ static int efx_change_mtu(struct net_dev
+
+ efx_stop_all(efx);
+
++ /* Ask driverlink client if we can change MTU */
++ rc = EFX_DL_CALLBACK(efx, request_mtu, new_mtu);
++ if (rc)
++ goto out;
++
+ EFX_LOG(efx, "changing MTU to %d\n", new_mtu);
+
+ efx_fini_channels(efx);
+@@ -1435,6 +1440,10 @@ static int efx_change_mtu(struct net_dev
+ if (rc)
+ goto fail;
+
++ /* Notify driverlink client of new MTU */
++ EFX_DL_CALLBACK(efx, mtu_changed, new_mtu);
++
++ out:
+ efx_start_all(efx);
+ return rc;
+
+@@ -1587,6 +1596,23 @@ static void efx_unregister_netdev(struct
+ * Device reset and suspend
+ *
+ **************************************************************************/
++/* Serialise access to the driverlink callbacks, by quiescing event processing
++ * (without flushing the descriptor queues), and acquiring the rtnl_lock */
++void efx_suspend(struct efx_nic *efx)
++{
++ EFX_LOG(efx, "suspending operations\n");
++
++ rtnl_lock();
++ efx_stop_all(efx);
++}
++
++void efx_resume(struct efx_nic *efx)
++{
++ EFX_LOG(efx, "resuming operations\n");
++
++ efx_start_all(efx);
++ rtnl_unlock();
++}
+
+ /* The final hardware and software finalisation before reset. */
+ static int efx_reset_down(struct efx_nic *efx, struct ethtool_cmd *ecmd)
+@@ -1649,8 +1675,8 @@ static int efx_reset(struct efx_nic *efx
+ enum reset_type method = efx->reset_pending;
+ int rc;
+
+- /* Serialise with kernel interfaces */
+ rtnl_lock();
++ efx_dl_reset_suspend(efx);
+
+ /* If we're not RUNNING then don't reset. Leave the reset_pending
+ * flag set so that efx_pci_probe_main will be retried */
+@@ -1717,6 +1743,7 @@ static int efx_reset(struct efx_nic *efx
+ efx_start_all(efx);
+
+ unlock_rtnl:
++ efx_dl_reset_resume(efx, 1);
+ rtnl_unlock();
+ return 0;
+
+@@ -1729,6 +1756,7 @@ static int efx_reset(struct efx_nic *efx
+ efx->state = STATE_DISABLED;
+
+ mutex_unlock(&efx->mac_lock);
++ efx_dl_reset_resume(efx, 0);
+ rtnl_unlock();
+ efx_unregister_netdev(efx);
+ efx_fini_port(efx);
+@@ -1871,6 +1899,9 @@ static int efx_init_struct(struct efx_ni
+ mutex_init(&efx->mac_lock);
+ efx->phy_op = &efx_dummy_phy_operations;
+ efx->mii.dev = net_dev;
++ INIT_LIST_HEAD(&efx->dl_node);
++ INIT_LIST_HEAD(&efx->dl_device_list);
++ efx->dl_cb = efx_default_callbacks;
+ INIT_WORK(&efx->reconfigure_work, efx_reconfigure_work);
+ atomic_set(&efx->netif_stop_count, 1);
+
+@@ -1990,6 +2021,7 @@ static void efx_pci_remove(struct pci_de
+ efx = pci_get_drvdata(pci_dev);
+ if (!efx)
+ return;
++ efx_dl_unregister_nic(efx);
+
+ /* Mark the NIC as fini, then stop the interface */
+ rtnl_lock();
+@@ -2157,8 +2189,15 @@ static int __devinit efx_pci_probe(struc
+
+ EFX_LOG(efx, "initialisation successful\n");
+
++ /* Register with driverlink layer */
++ rc = efx_dl_register_nic(efx);
++ if (rc)
++ goto fail6;
++
+ return 0;
+
++ fail6:
++ efx_unregister_netdev(efx);
+ fail5:
+ efx_pci_remove_main(efx);
+ fail4:
+Index: head-2008-08-18/drivers/net/sfc/falcon.c
+===================================================================
+--- head-2008-08-18.orig/drivers/net/sfc/falcon.c 2008-08-18 10:16:43.000000000 +0200
++++ head-2008-08-18/drivers/net/sfc/falcon.c 2008-08-18 10:16:46.000000000 +0200
+@@ -36,12 +36,12 @@
+
+ /**
+ * struct falcon_nic_data - Falcon NIC state
+- * @next_buffer_table: First available buffer table id
++ * @resources: Resource information for driverlink client
+ * @pci_dev2: The secondary PCI device if present
+ * @i2c_data: Operations and state for I2C bit-bashing algorithm
+ */
+ struct falcon_nic_data {
+- unsigned next_buffer_table;
++ struct efx_dl_falcon_resources resources;
+ struct pci_dev *pci_dev2;
+ struct i2c_algo_bit_data i2c_data;
+ };
+@@ -322,8 +322,8 @@ static int falcon_alloc_special_buffer(s
+ memset(buffer->addr, 0xff, len);
+
+ /* Select new buffer ID */
+- buffer->index = nic_data->next_buffer_table;
+- nic_data->next_buffer_table += buffer->entries;
++ buffer->index = nic_data->resources.buffer_table_min;
++ nic_data->resources.buffer_table_min += buffer->entries;
+
+ EFX_LOG(efx, "allocating special buffers %d-%d at %llx+%x "
+ "(virt %p phys %lx)\n", buffer->index,
+@@ -1115,10 +1115,12 @@ static void falcon_handle_driver_event(s
+ case TX_DESCQ_FLS_DONE_EV_DECODE:
+ EFX_TRACE(efx, "channel %d TXQ %d flushed\n",
+ channel->channel, ev_sub_data);
++ EFX_DL_CALLBACK(efx, event, event);
+ break;
+ case RX_DESCQ_FLS_DONE_EV_DECODE:
+ EFX_TRACE(efx, "channel %d RXQ %d flushed\n",
+ channel->channel, ev_sub_data);
++ EFX_DL_CALLBACK(efx, event, event);
+ break;
+ case EVQ_INIT_DONE_EV_DECODE:
+ EFX_LOG(efx, "channel %d EVQ %d initialised\n",
+@@ -1127,14 +1129,17 @@ static void falcon_handle_driver_event(s
+ case SRM_UPD_DONE_EV_DECODE:
+ EFX_TRACE(efx, "channel %d SRAM update done\n",
+ channel->channel);
++ EFX_DL_CALLBACK(efx, event, event);
+ break;
+ case WAKE_UP_EV_DECODE:
+ EFX_TRACE(efx, "channel %d RXQ %d wakeup event\n",
+ channel->channel, ev_sub_data);
++ EFX_DL_CALLBACK(efx, event, event);
+ break;
+ case TIMER_EV_DECODE:
+ EFX_TRACE(efx, "channel %d RX queue %d timer expired\n",
+ channel->channel, ev_sub_data);
++ EFX_DL_CALLBACK(efx, event, event);
+ break;
+ case RX_RECOVERY_EV_DECODE:
+ EFX_ERR(efx, "channel %d seen DRIVER RX_RESET event. "
+@@ -1159,6 +1164,7 @@ static void falcon_handle_driver_event(s
+ EFX_TRACE(efx, "channel %d unknown driver event code %d "
+ "data %04x\n", channel->channel, ev_sub_code,
+ ev_sub_data);
++ EFX_DL_CALLBACK(efx, event, event);
+ break;
+ }
+ }
+@@ -2371,6 +2377,59 @@ static int falcon_probe_nvconfig(struct
+ return rc;
+ }
+
++/* Looks at available SRAM resources and silicon revision, and works out
++ * how many queues we can support, and where things like descriptor caches
++ * should live. */
++static int falcon_dimension_resources(struct efx_nic *efx)
++{
++ unsigned internal_dcs_entries;
++ struct falcon_nic_data *nic_data = efx->nic_data;
++ struct efx_dl_falcon_resources *res = &nic_data->resources;
++
++ /* Fill out the driverlink resource list */
++ res->hdr.type = EFX_DL_FALCON_RESOURCES;
++ res->biu_lock = &efx->biu_lock;
++ efx->dl_info = &res->hdr;
++
++ /* NB. The minimum values get increased as this driver initialises
++ * its resources, so this should prevent any overlap.
++ */
++ switch (falcon_rev(efx)) {
++ case FALCON_REV_A1:
++ res->rxq_min = 16;
++ res->txq_min = 16;
++ res->evq_int_min = 4;
++ res->evq_int_lim = 5;
++ res->evq_timer_min = 5;
++ res->evq_timer_lim = 4096;
++ internal_dcs_entries = 8192;
++ break;
++ case FALCON_REV_B0:
++ default:
++ res->rxq_min = 0;
++ res->txq_min = 0;
++ res->evq_int_min = 0;
++ res->evq_int_lim = 64;
++ res->evq_timer_min = 64;
++ res->evq_timer_lim = 4096;
++ internal_dcs_entries = 4096;
++ break;
++ }
++
++ /* Internal SRAM only for now */
++ res->rxq_lim = internal_dcs_entries / RX_DC_ENTRIES;
++ res->txq_lim = internal_dcs_entries / TX_DC_ENTRIES;
++ res->buffer_table_lim = 8192;
++
++ if (FALCON_IS_DUAL_FUNC(efx))
++ res->flags |= EFX_DL_FALCON_DUAL_FUNC;
++
++ if (EFX_INT_MODE_USE_MSI(efx))
++ res->flags |= EFX_DL_FALCON_USE_MSI;
++
++ return 0;
++}
++
+ /* Probe the NIC variant (revision, ASIC vs FPGA, function count, port
+ * count, port speed). Set workaround and feature flags accordingly.
+ */
+@@ -2403,10 +2462,12 @@ static int falcon_probe_nic_variant(stru
+ EFX_ERR(efx, "1G mode not supported\n");
+ return -ENODEV;
+ }
++ efx->silicon_rev = "falcon/a1";
+ break;
+ }
+
+ case FALCON_REV_B0:
++ efx->silicon_rev = "falcon/b0";
+ break;
+
+ default:
+@@ -2472,6 +2533,10 @@ int falcon_probe_nic(struct efx_nic *efx
+ if (rc)
+ goto fail5;
+
++ rc = falcon_dimension_resources(efx);
++ if (rc)
++ goto fail6;
++
+ /* Initialise I2C adapter */
+ efx->i2c_adap.owner = THIS_MODULE;
+ nic_data->i2c_data = falcon_i2c_bit_operations;
+@@ -2481,10 +2546,12 @@ int falcon_probe_nic(struct efx_nic *efx
+ strlcpy(efx->i2c_adap.name, "SFC4000 GPIO", sizeof(efx->i2c_adap.name));
+ rc = i2c_bit_add_bus(&efx->i2c_adap);
+ if (rc)
+- goto fail5;
++ goto fail6;
+
+ return 0;
+
++ fail6:
++ efx->dl_info = NULL;
+ fail5:
+ falcon_free_buffer(efx, &efx->irq_status);
+ fail4:
+@@ -2675,6 +2742,7 @@ void falcon_remove_nic(struct efx_nic *e
+ /* Tear down the private nic state */
+ kfree(efx->nic_data);
+ efx->nic_data = NULL;
++ efx->dl_info = NULL;
+ }
+
+ void falcon_update_nic_stats(struct efx_nic *efx)
+Index: head-2008-08-18/drivers/net/sfc/net_driver.h
+===================================================================
+--- head-2008-08-18.orig/drivers/net/sfc/net_driver.h 2008-08-18 10:16:43.000000000 +0200
++++ head-2008-08-18/drivers/net/sfc/net_driver.h 2008-08-18 10:16:46.000000000 +0200
+@@ -30,6 +30,8 @@
+
+ #include "enum.h"
+ #include "bitfield.h"
++#include "driverlink_api.h"
++#include "driverlink.h"
+
+ #define EFX_MAX_LRO_DESCRIPTORS 8
+ #define EFX_MAX_LRO_AGGR MAX_SKB_FRAGS
+@@ -676,6 +678,12 @@ union efx_multicast_hash {
+ * @loopback_mode: Loopback status
+ * @loopback_modes: Supported loopback mode bitmask
+ * @loopback_selftest: Offline self-test private state
++ * @silicon_rev: Silicon revision description for driverlink
++ * @dl_info: Linked list of hardware parameters exposed through driverlink
++ * @dl_node: Driverlink port list
++ * @dl_device_list: Driverlink device list
++ * @dl_cb: Driverlink callbacks table
++ * @dl_cb_dev: Driverlink callback owner devices
+ *
+ * The @priv field of the corresponding &struct net_device points to
+ * this.
+@@ -752,6 +760,13 @@ struct efx_nic {
+ unsigned int loopback_modes;
+
+ void *loopback_selftest;
++
++ const char *silicon_rev;
++ struct efx_dl_device_info *dl_info;
++ struct list_head dl_node;
++ struct list_head dl_device_list;
++ struct efx_dl_callbacks dl_cb;
++ struct efx_dl_cb_devices dl_cb_dev;
+ };
+
+ static inline int efx_dev_registered(struct efx_nic *efx)
+Index: head-2008-08-18/drivers/net/sfc/rx.c
+===================================================================
+--- head-2008-08-18.orig/drivers/net/sfc/rx.c 2008-08-18 10:16:43.000000000 +0200
++++ head-2008-08-18/drivers/net/sfc/rx.c 2008-08-18 10:16:46.000000000 +0200
+@@ -549,8 +549,22 @@ static inline void efx_rx_packet__check_
+ static inline void efx_rx_packet_lro(struct efx_channel *channel,
+ struct efx_rx_buffer *rx_buf)
+ {
++ struct efx_nic *efx = channel->efx;
+ struct net_lro_mgr *lro_mgr = &channel->lro_mgr;
+ void *priv = channel;
++ enum efx_veto veto;
++
++ /* It would be faster if we had access to packets at the
++ * other side of generic LRO. Unfortunately, there isn't
++ * an obvious interface to this, so veto packets before LRO */
++ veto = EFX_DL_CALLBACK(efx, rx_packet, rx_buf->data, rx_buf->len);
++ if (unlikely(veto)) {
++ EFX_TRACE(efx, "LRO RX vetoed by driverlink %s driver\n",
++ efx->dl_cb_dev.rx_packet->driver->name);
++ /* Free the buffer now */
++ efx_free_rx_buffer(efx, rx_buf);
++ return;
++ }
+
+ /* Pass the skb/page into the LRO engine */
+ if (rx_buf->page) {
+@@ -686,6 +700,7 @@ void __efx_rx_packet(struct efx_channel
+ struct efx_rx_buffer *rx_buf, int checksummed)
+ {
+ struct efx_nic *efx = channel->efx;
++ enum efx_veto veto;
+ struct sk_buff *skb;
+ int lro = efx->net_dev->features & NETIF_F_LRO;
+
+@@ -723,6 +738,16 @@ void __efx_rx_packet(struct efx_channel
+ goto done;
+ }
+
++ /* Allow callback to veto the packet */
++ veto = EFX_DL_CALLBACK(efx, rx_packet, rx_buf->data, rx_buf->len);
++ if (unlikely(veto)) {
++ EFX_LOG(efx, "RX vetoed by driverlink %s driver\n",
++ efx->dl_cb_dev.rx_packet->driver->name);
++ /* Free the buffer now */
++ efx_free_rx_buffer(efx, rx_buf);
++ goto done;
++ }
++
+ /* Form an skb if required */
+ if (rx_buf->page) {
+ int hdr_len = min(rx_buf->len, EFX_SKB_HEADERS);
+Index: head-2008-08-18/drivers/net/sfc/tx.c
+===================================================================
+--- head-2008-08-18.orig/drivers/net/sfc/tx.c 2008-08-18 10:16:43.000000000 +0200
++++ head-2008-08-18/drivers/net/sfc/tx.c 2008-08-18 10:16:46.000000000 +0200
+@@ -368,7 +368,21 @@ inline int efx_xmit(struct efx_nic *efx,
+ int efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
+ {
+ struct efx_nic *efx = net_dev->priv;
+- return efx_xmit(efx, &efx->tx_queue[0], skb);
++ struct efx_tx_queue *tx_queue = &efx->tx_queue[0];
++ enum efx_veto veto;
++
++ /* See if driverlink wants to veto the packet. */
++ veto = EFX_DL_CALLBACK(efx, tx_packet, skb);
++ if (unlikely(veto)) {
++ EFX_TRACE(efx, "TX queue %d packet vetoed by "
++ "driverlink %s driver\n", tx_queue->queue,
++ efx->dl_cb_dev.tx_packet->driver->name);
++ /* Free the skb; nothing else will do it */
++ dev_kfree_skb_any(skb);
++ return NETDEV_TX_OK;
++ }
++
++ return efx_xmit(efx, tx_queue, skb);
+ }
+
+ void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index)
--- /dev/null
+From: David Riddoch <driddoch@solarflare.com>
+# replaces http://xenbits.xensource.com/linux-2.6.18-xen.hg c/s 421:
+# HG changeset patch
+# User Keir Fraser <keir.fraser@citrix.com>
+# Date 1203330569 0
+# Node ID e4dd072db2595c420bb21d9e835416f4fd543526
+# Parent fc90e9b2c12b316b5460ece28f013e6de881af1a
+Subject: Solarflare: Resource driver.
+References: FATE#303479
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-07-15/drivers/net/sfc/Kconfig
+===================================================================
+--- head-2008-07-15.orig/drivers/net/sfc/Kconfig 2008-07-17 16:17:36.000000000 +0200
++++ head-2008-07-15/drivers/net/sfc/Kconfig 2008-07-17 16:18:07.000000000 +0200
+@@ -12,3 +12,9 @@ config SFC
+
+ To compile this driver as a module, choose M here. The module
+ will be called sfc.
++
++config SFC_RESOURCE
++ depends on SFC && X86
++ tristate "Solarflare Solarstorm SFC4000 resource driver"
++ help
++ This module provides the SFC resource manager driver.
+Index: head-2008-07-15/drivers/net/sfc/Makefile
+===================================================================
+--- head-2008-07-15.orig/drivers/net/sfc/Makefile 2008-07-17 16:17:53.000000000 +0200
++++ head-2008-07-15/drivers/net/sfc/Makefile 2008-07-17 16:18:07.000000000 +0200
+@@ -3,3 +3,5 @@ sfc-y += efx.o falcon.o tx.o rx.o falc
+ mdio_10g.o tenxpress.o boards.o sfe4001.o \
+ driverlink.o
+ obj-$(CONFIG_SFC) += sfc.o
++
++obj-$(CONFIG_SFC_RESOURCE) += sfc_resource/
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/Makefile 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,14 @@
++obj-$(CONFIG_SFC_RESOURCE) := sfc_resource.o
++
++EXTRA_CFLAGS += -D__CI_HARDWARE_CONFIG_FALCON__
++EXTRA_CFLAGS += -D__ci_driver__
++EXTRA_CFLAGS += -Werror
++EXTRA_CFLAGS += -Idrivers/net/sfc -Idrivers/net/sfc/sfc_resource
++
++sfc_resource-objs := resource_driver.o iopage.o efx_vi_shm.o \
++ driverlink_new.o kernel_proc.o kfifo.o \
++ nic.o eventq.o falcon.o falcon_hash.o \
++ assert_valid.o buddy.o buffer_table.o filter_resource.o \
++ iobufset_resource.o resource_manager.o resources.o \
++ vi_resource_alloc.o vi_resource_event.o vi_resource_flush.o \
++ vi_resource_manager.o driver_object.o kernel_compat.o
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/assert_valid.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/assert_valid.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,92 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains functions to assert validness of resources and
++ * resource manager in DEBUG build of the resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/sysdep.h>
++
++#ifndef NDEBUG
++#include <ci/efrm/resource.h>
++#include <ci/efrm/driver_private.h>
++#include <ci/efrm/debug.h>
++
++void
++efrm_resource_manager_assert_valid(struct efrm_resource_manager *rm,
++ const char *file, int line)
++{
++ _EFRM_ASSERT(rm, file, line);
++ _EFRM_ASSERT(rm->rm_name, file, line);
++ _EFRM_ASSERT(rm->rm_type < EFRM_RESOURCE_NUM, file, line);
++ _EFRM_ASSERT(rm->rm_dtor, file, line);
++}
++EXPORT_SYMBOL(efrm_resource_manager_assert_valid);
++
++/*
++ * \param rs resource to validate
++ * \param ref_count_is_zero One of 3 values
++ * > 0 - check ref count is zero
++ * = 0 - check ref count is non-zero
++ * < 0 - ref count could be any value
++ */
++void
++efrm_resource_assert_valid(struct efrm_resource *rs, int ref_count_is_zero,
++ const char *file, int line)
++{
++ struct efrm_resource_manager *rm;
++
++ _EFRM_ASSERT(rs, file, line);
++
++ if (ref_count_is_zero >= 0) {
++ if (!(ref_count_is_zero || rs->rs_ref_count > 0)
++ || !(!ref_count_is_zero || rs->rs_ref_count == 0))
++ EFRM_WARN("%s: check %szero ref=%d " EFRM_RESOURCE_FMT,
++ __func__,
++ ref_count_is_zero == 0 ? "non-" : "",
++ rs->rs_ref_count,
++ EFRM_RESOURCE_PRI_ARG(rs->rs_handle));
++
++ _EFRM_ASSERT(!(ref_count_is_zero == 0) ||
++ rs->rs_ref_count != 0, file, line);
++ _EFRM_ASSERT(!(ref_count_is_zero > 0) ||
++ rs->rs_ref_count == 0, file, line);
++ }
++
++ rm = efrm_rm_table[EFRM_RESOURCE_TYPE(rs->rs_handle)];
++ efrm_resource_manager_assert_valid(rm, file, line);
++}
++EXPORT_SYMBOL(efrm_resource_assert_valid);
++
++#endif
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/buddy.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/buddy.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,220 @@
++
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains implementation of a buddy allocator.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efhw/common.h> /* get uintXX types on win32 */
++#include <ci/efrm/sysdep.h>
++#include <ci/efrm/buddy.h>
++#include <ci/efrm/debug.h>
++
++#if 1
++#define DEBUG_ALLOC(x)
++#else
++#define DEBUG_ALLOC(x) x
++
++static inline void efrm_buddy_dump(struct efrm_buddy_allocator *b)
++{
++ unsigned o;
++
++ EFRM_NOTICE("%s: dump allocator with order %u",
++ __func__, b->order);
++ for (o = 0; o <= b->order; o++) {
++ struct list_head *l = &b->free_lists[o];
++ while (l->next != &b->free_lists[o]) {
++ l = l->next;
++ EFRM_NOTICE("%s: order %x: %zx", __func__, o,
++ l - b->links);
++ }
++ }
++}
++#endif
++
++/*
++ * The purpose of the following inline functions is to give the
++ * understandable names to the simple actions.
++ */
++static inline void
++efrm_buddy_free_list_add(struct efrm_buddy_allocator *b,
++ unsigned order, unsigned addr)
++{
++ list_add(&b->links[addr], &b->free_lists[order]);
++ b->orders[addr] = (uint8_t) order;
++}
++static inline void
++efrm_buddy_free_list_del(struct efrm_buddy_allocator *b, unsigned addr)
++{
++ list_del(&b->links[addr]);
++ b->links[addr].next = NULL;
++}
++static inline int
++efrm_buddy_free_list_empty(struct efrm_buddy_allocator *b, unsigned order)
++{
++ return list_empty(&b->free_lists[order]);
++}
++static inline unsigned
++efrm_buddy_free_list_pop(struct efrm_buddy_allocator *b, unsigned order)
++{
++ struct list_head *l = list_pop(&b->free_lists[order]);
++ l->next = NULL;
++ return (unsigned)(l - b->links);
++}
++static inline int
++efrm_buddy_addr_in_free_list(struct efrm_buddy_allocator *b, unsigned addr)
++{
++ return b->links[addr].next != NULL;
++}
++static inline unsigned
++efrm_buddy_free_list_first(struct efrm_buddy_allocator *b, unsigned order)
++{
++ return (unsigned)(b->free_lists[order].next - b->links);
++}
++
++int efrm_buddy_ctor(struct efrm_buddy_allocator *b, unsigned order)
++{
++ unsigned o;
++ unsigned size = 1 << order;
++
++ DEBUG_ALLOC(EFRM_NOTICE("%s(%u)", __func__, order));
++ EFRM_ASSERT(b);
++ EFRM_ASSERT(order <= sizeof(unsigned) * 8 - 1);
++
++ b->order = order;
++ b->free_lists = vmalloc((order + 1) * sizeof(struct list_head));
++ if (b->free_lists == NULL)
++ goto fail1;
++
++ b->links = vmalloc(size * sizeof(struct list_head));
++ if (b->links == NULL)
++ goto fail2;
++
++ b->orders = vmalloc(size);
++ if (b->orders == NULL)
++ goto fail3;
++
++ memset(b->links, 0, size * sizeof(struct list_head));
++
++ for (o = 0; o <= b->order; ++o)
++ INIT_LIST_HEAD(b->free_lists + o);
++
++ efrm_buddy_free_list_add(b, b->order, 0);
++
++ return 0;
++
++fail3:
++ vfree(b->links);
++fail2:
++ vfree(b->free_lists);
++fail1:
++ return -ENOMEM;
++}
++
++void efrm_buddy_dtor(struct efrm_buddy_allocator *b)
++{
++ EFRM_ASSERT(b);
++
++ vfree(b->free_lists);
++ vfree(b->links);
++ vfree(b->orders);
++}
++
++int efrm_buddy_alloc(struct efrm_buddy_allocator *b, unsigned order)
++{
++ unsigned smallest;
++ unsigned addr;
++
++ DEBUG_ALLOC(EFRM_NOTICE("%s(%u)", __func__, order));
++ EFRM_ASSERT(b);
++
++ /* Find smallest chunk that is big enough. ?? Can optimise this by
++ ** keeping array of pointers to smallest chunk for each order.
++ */
++ smallest = order;
++ while (smallest <= b->order &&
++ efrm_buddy_free_list_empty(b, smallest))
++ ++smallest;
++
++ if (smallest > b->order) {
++ DEBUG_ALLOC(EFRM_NOTICE
++ ("buddy - alloc order %d failed - max order %d",
++ order, b->order););
++ return -ENOMEM;
++ }
++
++ /* Split blocks until we get one of the correct size. */
++ addr = efrm_buddy_free_list_pop(b, smallest);
++
++ DEBUG_ALLOC(EFRM_NOTICE("buddy - alloc %x order %d cut from order %d",
++ addr, order, smallest););
++ while (smallest-- > order)
++ efrm_buddy_free_list_add(b, smallest, addr + (1 << smallest));
++
++ EFRM_DO_DEBUG(b->orders[addr] = (uint8_t) order);
++
++ EFRM_ASSERT(addr < 1u << b->order);
++ return addr;
++}
++
++void
++efrm_buddy_free(struct efrm_buddy_allocator *b, unsigned addr,
++ unsigned order)
++{
++ unsigned buddy_addr;
++
++ DEBUG_ALLOC(EFRM_NOTICE("%s(%u, %u)", __func__, addr, order));
++ EFRM_ASSERT(b);
++ EFRM_ASSERT(order <= b->order);
++ EFRM_ASSERT((unsigned long)addr + ((unsigned long)1 << order) <=
++ (unsigned long)1 << b->order);
++ EFRM_ASSERT(!efrm_buddy_addr_in_free_list(b, addr));
++ EFRM_ASSERT(b->orders[addr] == order);
++
++ /* merge free blocks */
++ while (order < b->order) {
++ buddy_addr = addr ^ (1 << order);
++ if (!efrm_buddy_addr_in_free_list(b, buddy_addr) ||
++ b->orders[buddy_addr] != order)
++ break;
++ efrm_buddy_free_list_del(b, buddy_addr);
++ if (buddy_addr < addr)
++ addr = buddy_addr;
++ ++order;
++ }
++
++ DEBUG_ALLOC(EFRM_NOTICE
++ ("buddy - free %x merged into order %d", addr, order););
++ efrm_buddy_free_list_add(b, order, addr);
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/buffer_table.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/buffer_table.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,209 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains abstraction of the buffer table on the NIC.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++** Might be worth keeping a bitmap of which entries are clear. Then we
++** wouldn't need to clear them all again when we free an allocation.
++*/
++
++#include <ci/efrm/debug.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efrm/nic_table.h>
++#include <ci/efrm/buffer_table.h>
++#include <ci/efrm/buddy.h>
++
++/*! Comment? */
++struct efrm_buffer_table {
++ spinlock_t lock;
++ struct efrm_buddy_allocator buddy;
++};
++
++/* Efab buffer state. */
++static struct efrm_buffer_table efrm_buffers;
++
++int efrm_buffer_table_ctor(unsigned low, unsigned high)
++{
++ int log2_n_entries, rc, i;
++
++ EFRM_ASSERT(high > 0);
++ EFRM_ASSERT(low < high);
++
++ EFRM_TRACE("%s: low=%u high=%u", __func__, low, high);
++ EFRM_NOTICE("%s: low=%u high=%u", __func__, low, high);
++
++ log2_n_entries = fls(high - 1);
++
++ rc = efrm_buddy_ctor(&efrm_buffers.buddy, log2_n_entries);
++ if (rc < 0) {
++ EFRM_ERR("efrm_buffer_table_ctor: efrm_buddy_ctor(%d) "
++ "failed (%d)", log2_n_entries, rc);
++ return rc;
++ }
++ for (i = 0; i < (1 << log2_n_entries); ++i) {
++ rc = efrm_buddy_alloc(&efrm_buffers.buddy, 0);
++ EFRM_ASSERT(rc >= 0);
++ EFRM_ASSERT(rc < (1 << log2_n_entries));
++ }
++ for (i = low; i < (int) high; ++i)
++ efrm_buddy_free(&efrm_buffers.buddy, i, 0);
++
++ spin_lock_init(&efrm_buffers.lock);
++
++ EFRM_TRACE("%s: done", __func__);
++
++ return 0;
++}
++
++void efrm_buffer_table_dtor(void)
++{
++ /* ?? debug check that all allocations have been freed? */
++
++ spin_lock_destroy(&efrm_buffers.lock);
++ efrm_buddy_dtor(&efrm_buffers.buddy);
++
++ EFRM_TRACE("%s: done", __func__);
++}
++
++/**********************************************************************/
++
++int
++efrm_buffer_table_alloc(unsigned order,
++ struct efhw_buffer_table_allocation *a)
++{
++ irq_flags_t lock_flags;
++ int rc;
++
++ EFRM_ASSERT(&efrm_buffers.buddy);
++ EFRM_ASSERT(a);
++
++ /* Round up to multiple of two, as the buffer clear logic works in
++ * pairs when not in "full" mode. */
++ order = max_t(unsigned, order, 1);
++
++ spin_lock_irqsave(&efrm_buffers.lock, lock_flags);
++ rc = efrm_buddy_alloc(&efrm_buffers.buddy, order);
++ spin_unlock_irqrestore(&efrm_buffers.lock, lock_flags);
++
++ if (rc < 0) {
++ EFRM_ERR("efrm_buffer_table_alloc: failed (n=%ld) rc %d",
++ 1ul << order, rc);
++ return rc;
++ }
++
++ EFRM_TRACE("efrm_buffer_table_alloc: base=%d n=%ld",
++ rc, 1ul << order);
++ a->order = order;
++ a->base = (unsigned)rc;
++ return 0;
++}
++
++void efrm_buffer_table_free(struct efhw_buffer_table_allocation *a)
++{
++ irq_flags_t lock_flags;
++ struct efhw_nic *nic;
++ int nic_i;
++
++ EFRM_ASSERT(&efrm_buffers.buddy);
++ EFRM_ASSERT(a);
++ EFRM_ASSERT(a->base != -1);
++ EFRM_ASSERT((unsigned long)a->base + (1ul << a->order) <=
++ efrm_buddy_size(&efrm_buffers.buddy));
++
++ EFRM_TRACE("efrm_buffer_table_free: base=%d n=%ld",
++ a->base, (1ul << a->order));
++
++ EFRM_FOR_EACH_NIC(nic_i, nic)
++ efhw_nic_buffer_table_clear(nic, a->base, 1ul << a->order);
++
++ spin_lock_irqsave(&efrm_buffers.lock, lock_flags);
++ efrm_buddy_free(&efrm_buffers.buddy, a->base, a->order);
++ spin_unlock_irqrestore(&efrm_buffers.lock, lock_flags);
++
++ EFRM_DO_DEBUG(a->base = a->order = -1);
++}
++
++/**********************************************************************/
++
++void
++efrm_buffer_table_set(struct efhw_buffer_table_allocation *a,
++ struct efhw_nic *nic,
++ unsigned i, dma_addr_t dma_addr, int owner)
++{
++ EFRM_ASSERT(a);
++ EFRM_ASSERT(i < (unsigned)1 << a->order);
++
++ efhw_nic_buffer_table_set(nic, dma_addr, EFHW_NIC_PAGE_SIZE,
++ 0, owner, a->base + i);
++}
++
++
++int efrm_buffer_table_size(void)
++{
++ return efrm_buddy_size(&efrm_buffers.buddy);
++}
++
++/**********************************************************************/
++
++int
++efrm_page_register(struct efhw_nic *nic, dma_addr_t dma_addr, int owner,
++ efhw_buffer_addr_t *buf_addr_out)
++{
++ struct efhw_buffer_table_allocation alloc;
++ int rc;
++
++ rc = efrm_buffer_table_alloc(0, &alloc);
++ if (rc == 0) {
++ efrm_buffer_table_set(&alloc, nic, 0, dma_addr, owner);
++ efrm_buffer_table_commit();
++ *buf_addr_out = EFHW_BUFFER_ADDR(alloc.base, 0);
++ }
++ return rc;
++}
++EXPORT_SYMBOL(efrm_page_register);
++
++void efrm_page_unregister(efhw_buffer_addr_t buf_addr)
++{
++ struct efhw_buffer_table_allocation alloc;
++
++ alloc.order = 0;
++ alloc.base = EFHW_BUFFER_PAGE(buf_addr);
++ efrm_buffer_table_free(&alloc);
++}
++EXPORT_SYMBOL(efrm_page_unregister);
++
++void efrm_buffer_table_commit(void)
++{
++ struct efhw_nic *nic;
++ int nic_i;
++
++ EFRM_FOR_EACH_NIC(nic_i, nic)
++ efhw_nic_buffer_table_commit(nic);
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,188 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides EtherFabric NIC hardware interface.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_EFAB_HARDWARE_H__
++#define __CI_DRIVER_EFAB_HARDWARE_H__
++
++#include "ci/driver/efab/hardware/workarounds.h"
++#include <ci/efhw/hardware_sysdep.h>
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Common EtherFabric definitions
++ *
++ *---------------------------------------------------------------------------*/
++
++#include <ci/efhw/debug.h>
++#include <ci/efhw/common.h>
++#include <ci/driver/efab/hardware/common.h>
++
++/*----------------------------------------------------------------------------
++ *
++ * EtherFabric varients
++ *
++ *---------------------------------------------------------------------------*/
++
++#include <ci/driver/efab/hardware/falcon.h>
++
++/*----------------------------------------------------------------------------
++ *
++ * EtherFabric Portable Hardware Layer defines
++ *
++ *---------------------------------------------------------------------------*/
++
++ /*-------------- Initialisation ------------ */
++#define efhw_nic_close_hardware(nic) \
++ ((nic)->efhw_func->close_hardware(nic))
++
++#define efhw_nic_init_hardware(nic, ev_handlers, mac_addr, non_irq_evq) \
++ ((nic)->efhw_func->init_hardware((nic), (ev_handlers), (mac_addr), \
++ (non_irq_evq)))
++
++/*-------------- Interrupt support ------------ */
++/** Handle interrupt. Return 0 if not handled, 1 if handled. */
++#define efhw_nic_interrupt(nic) \
++ ((nic)->efhw_func->interrupt(nic))
++
++#define efhw_nic_interrupt_enable(nic) \
++ ((nic)->efhw_func->interrupt_enable(nic))
++
++#define efhw_nic_interrupt_disable(nic) \
++ ((nic)->efhw_func->interrupt_disable(nic))
++
++#define efhw_nic_set_interrupt_moderation(nic, evq, val) \
++ ((nic)->efhw_func->set_interrupt_moderation(nic, evq, val))
++
++/*-------------- Event support ------------ */
++
++#define efhw_nic_event_queue_enable(nic, evq, size, q_base, buf_base, \
++ interrupting) \
++ ((nic)->efhw_func->event_queue_enable((nic), (evq), (size), (q_base), \
++ (buf_base), (interrupting)))
++
++#define efhw_nic_event_queue_disable(nic, evq, timer_only) \
++ ((nic)->efhw_func->event_queue_disable(nic, evq, timer_only))
++
++#define efhw_nic_wakeup_request(nic, q_base, index, evq) \
++ ((nic)->efhw_func->wakeup_request(nic, q_base, index, evq))
++
++#define efhw_nic_sw_event(nic, data, ev) \
++ ((nic)->efhw_func->sw_event(nic, data, ev))
++
++/*-------------- Filter support ------------ */
++#define efhw_nic_ipfilter_set(nic, type, index, dmaq, \
++ saddr, sport, daddr, dport) \
++ ((nic)->efhw_func->ipfilter_set(nic, type, index, dmaq, \
++ saddr, sport, daddr, dport))
++
++#define efhw_nic_ipfilter_clear(nic, index) \
++ ((nic)->efhw_func->ipfilter_clear(nic, index))
++
++/*-------------- DMA support ------------ */
++#define efhw_nic_dmaq_tx_q_init(nic, dmaq, evq, owner, tag, \
++ dmaq_size, index, flags) \
++ ((nic)->efhw_func->dmaq_tx_q_init(nic, dmaq, evq, owner, tag, \
++ dmaq_size, index, flags))
++
++#define efhw_nic_dmaq_rx_q_init(nic, dmaq, evq, owner, tag, \
++ dmaq_size, index, flags) \
++ ((nic)->efhw_func->dmaq_rx_q_init(nic, dmaq, evq, owner, tag, \
++ dmaq_size, index, flags))
++
++#define efhw_nic_dmaq_tx_q_disable(nic, dmaq) \
++ ((nic)->efhw_func->dmaq_tx_q_disable(nic, dmaq))
++
++#define efhw_nic_dmaq_rx_q_disable(nic, dmaq) \
++ ((nic)->efhw_func->dmaq_rx_q_disable(nic, dmaq))
++
++#define efhw_nic_flush_tx_dma_channel(nic, dmaq) \
++ ((nic)->efhw_func->flush_tx_dma_channel(nic, dmaq))
++
++#define efhw_nic_flush_rx_dma_channel(nic, dmaq) \
++ ((nic)->efhw_func->flush_rx_dma_channel(nic, dmaq))
++
++/*-------------- MAC Low level interface ---- */
++#define efhw_gmac_get_mac_addr(nic) \
++ ((nic)->gmac->get_mac_addr((nic)->gmac))
++
++/*-------------- Buffer table -------------- */
++#define efhw_nic_buffer_table_set(nic, addr, bufsz, region, \
++ own_id, buf_id) \
++ ((nic)->efhw_func->buffer_table_set(nic, addr, bufsz, region, \
++ own_id, buf_id))
++
++#define efhw_nic_buffer_table_set_n(nic, buf_id, addr, bufsz, \
++ region, n_pages, own_id) \
++ ((nic)->efhw_func->buffer_table_set_n(nic, buf_id, addr, bufsz, \
++ region, n_pages, own_id))
++
++#define efhw_nic_buffer_table_clear(nic, id, num) \
++ ((nic)->efhw_func->buffer_table_clear(nic, id, num))
++
++#define efhw_nic_buffer_table_commit(nic) \
++ ((nic)->efhw_func->buffer_table_commit(nic))
++
++/*-------------- New filter API ------------ */
++#define efhw_nic_filter_set(nic, spec, index_out) \
++ ((nic)->efhw_func->filter_set(nic, spec, index_out))
++
++#define efhw_nic_filter_clear(nic, type, index_out) \
++ ((nic)->efhw_func->filter_clear(nic, type, index_out))
++
++
++/* --- DMA --- */
++#define EFHW_DMA_ADDRMASK (0xffffffffffffffffULL)
++
++/* --- Buffers --- */
++#define EFHW_BUFFER_ADDR FALCON_BUFFER_4K_ADDR
++#define EFHW_BUFFER_PAGE FALCON_BUFFER_4K_PAGE
++#define EFHW_BUFFER_OFF FALCON_BUFFER_4K_OFF
++
++/* --- Filters --- */
++#define EFHW_IP_FILTER_NUM FALCON_FILTER_TBL_NUM
++
++#define EFHW_MAX_PAGE_SIZE FALCON_MAX_PAGE_SIZE
++
++#if PAGE_SIZE <= EFHW_MAX_PAGE_SIZE
++#define EFHW_NIC_PAGE_SIZE PAGE_SIZE
++#else
++#define EFHW_NIC_PAGE_SIZE EFHW_MAX_PAGE_SIZE
++#endif
++#define EFHW_NIC_PAGE_MASK (~(EFHW_NIC_PAGE_SIZE-1))
++
++#endif /* __CI_DRIVER_EFAB_HARDWARE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/common.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,68 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides EtherFabric NIC hardware interface common
++ * definitions.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_EFAB_HARDWARE_COMMON_H__
++#define __CI_DRIVER_EFAB_HARDWARE_COMMON_H__
++
++/*----------------------------------------------------------------------------
++ *
++ * EtherFabric constants
++ *
++ *---------------------------------------------------------------------------*/
++
++#define EFHW_1K 0x00000400u
++#define EFHW_2K 0x00000800u
++#define EFHW_4K 0x00001000u
++#define EFHW_8K 0x00002000u
++#define EFHW_16K 0x00004000u
++#define EFHW_32K 0x00008000u
++#define EFHW_64K 0x00010000u
++#define EFHW_128K 0x00020000u
++#define EFHW_256K 0x00040000u
++#define EFHW_512K 0x00080000u
++#define EFHW_1M 0x00100000u
++#define EFHW_2M 0x00200000u
++#define EFHW_4M 0x00400000u
++#define EFHW_8M 0x00800000u
++#define EFHW_16M 0x01000000u
++#define EFHW_32M 0x02000000u
++#define EFHW_48M 0x03000000u
++#define EFHW_64M 0x04000000u
++#define EFHW_128M 0x08000000u
++#define EFHW_256M 0x10000000u
++#define EFHW_512M 0x20000000u
++#define EFHW_1G 0x40000000u
++#define EFHW_2G 0x80000000u
++#define EFHW_4G 0x100000000ULL
++#define EFHW_8G 0x200000000ULL
++
++#endif /* __CI_DRIVER_EFAB_HARDWARE_COMMON_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,422 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides EtherFabric NIC - EFXXXX (aka Falcon) specific
++ * definitions.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_EFAB_HARDWARE_FALCON_H__
++#define __CI_DRIVER_EFAB_HARDWARE_FALCON_H__
++
++/*----------------------------------------------------------------------------
++ * Compile options
++ *---------------------------------------------------------------------------*/
++
++/* Falcon has an 8K maximum page size. */
++#define FALCON_MAX_PAGE_SIZE EFHW_8K
++
++/* include the register definitions */
++#include <ci/driver/efab/hardware/falcon/falcon_core.h>
++#include <ci/driver/efab/hardware/falcon/falcon_desc.h>
++#include <ci/driver/efab/hardware/falcon/falcon_event.h>
++#include <ci/driver/efab/hardware/falcon/falcon_intr_vec.h>
++
++#define FALCON_DMA_TX_DESC_BYTES 8
++#define FALCON_DMA_RX_PHYS_DESC_BYTES 8
++#define FALCON_DMA_RX_BUF_DESC_BYTES 4
++
++
++/* ---- efhw_event_t helpers --- */
++
++#ifndef EFHW_IS_LITTLE_ENDIAN
++#error This needs lots of cpu_to_le64s() in
++#endif
++
++/*!\ TODO look at whether there is an efficiency gain to be had by
++ treating the event codes to 32bit masks as is done for EF1
++
++ These masks apply to the full 64 bits of the event to extract the
++ event code - followed by the common event codes to expect
++ */
++#define __FALCON_OPEN_MASK(WIDTH) ((((uint64_t)1) << (WIDTH)) - 1)
++#define FALCON_EVENT_CODE_MASK \
++ (__FALCON_OPEN_MASK(EV_CODE_WIDTH) << EV_CODE_LBN)
++#define FALCON_EVENT_EV_Q_ID_MASK \
++ (__FALCON_OPEN_MASK(DRIVER_EV_EVQ_ID_WIDTH) << DRIVER_EV_EVQ_ID_LBN)
++#define FALCON_EVENT_TX_FLUSH_Q_ID_MASK \
++ (__FALCON_OPEN_MASK(DRIVER_EV_TX_DESCQ_ID_WIDTH) << \
++ DRIVER_EV_TX_DESCQ_ID_LBN)
++#define FALCON_EVENT_RX_FLUSH_Q_ID_MASK \
++ (__FALCON_OPEN_MASK(DRIVER_EV_RX_DESCQ_ID_WIDTH) << \
++ DRIVER_EV_RX_DESCQ_ID_LBN)
++#define FALCON_EVENT_DRV_SUBCODE_MASK \
++ (__FALCON_OPEN_MASK(DRIVER_EV_SUB_CODE_WIDTH) << \
++ DRIVER_EV_SUB_CODE_LBN)
++
++#define FALCON_EVENT_FMT "[ev:%x:%08x:%08x]"
++#define FALCON_EVENT_PRI_ARG(e) \
++ ((unsigned)(((e).u64 & FALCON_EVENT_CODE_MASK) >> EV_CODE_LBN)), \
++ ((unsigned)((e).u64 >> 32)), ((unsigned)((e).u64 & 0xFFFFFFFF))
++
++#define FALCON_EVENT_CODE(evp) ((evp)->u64 & FALCON_EVENT_CODE_MASK)
++#define FALCON_EVENT_WAKE_EVQ_ID(evp) \
++ (((evp)->u64 & FALCON_EVENT_EV_Q_ID_MASK) >> DRIVER_EV_EVQ_ID_LBN)
++#define FALCON_EVENT_TX_FLUSH_Q_ID(evp) \
++ (((evp)->u64 & FALCON_EVENT_TX_FLUSH_Q_ID_MASK) >> \
++ DRIVER_EV_TX_DESCQ_ID_LBN)
++#define FALCON_EVENT_RX_FLUSH_Q_ID(evp) \
++ (((evp)->u64 & FALCON_EVENT_RX_FLUSH_Q_ID_MASK) >> \
++ DRIVER_EV_RX_DESCQ_ID_LBN)
++#define FALCON_EVENT_DRIVER_SUBCODE(evp) \
++ (((evp)->u64 & FALCON_EVENT_DRV_SUBCODE_MASK) >> \
++ DRIVER_EV_SUB_CODE_LBN)
++
++#define FALCON_EVENT_CODE_CHAR ((uint64_t)DRIVER_EV_DECODE << EV_CODE_LBN)
++#define FALCON_EVENT_CODE_SW ((uint64_t)DRV_GEN_EV_DECODE << EV_CODE_LBN)
++
++
++/* so this is the size in bytes of an awful lot of things */
++#define FALCON_REGISTER128 (16)
++
++/* we define some unique dummy values as a debug aid */
++#ifdef _WIN32
++#define FALCON_ATOMIC_BASE 0xdeadbeef00000000ui64
++#else
++#define FALCON_ATOMIC_BASE 0xdeadbeef00000000ULL
++#endif
++#define FALCON_ATOMIC_UPD_REG (FALCON_ATOMIC_BASE | 0x1)
++#define FALCON_ATOMIC_PTR_TBL_REG (FALCON_ATOMIC_BASE | 0x2)
++#define FALCON_ATOMIC_SRPM_UDP_EVQ_REG (FALCON_ATOMIC_BASE | 0x3)
++#define FALCON_ATOMIC_RX_FLUSH_DESCQ (FALCON_ATOMIC_BASE | 0x4)
++#define FALCON_ATOMIC_TX_FLUSH_DESCQ (FALCON_ATOMIC_BASE | 0x5)
++#define FALCON_ATOMIC_INT_EN_REG (FALCON_ATOMIC_BASE | 0x6)
++#define FALCON_ATOMIC_TIMER_CMD_REG (FALCON_ATOMIC_BASE | 0x7)
++#define FALCON_ATOMIC_PACE_REG (FALCON_ATOMIC_BASE | 0x8)
++#define FALCON_ATOMIC_INT_ACK_REG (FALCON_ATOMIC_BASE | 0x9)
++/* XXX It crashed with odd value in FALCON_ATOMIC_INT_ADR_REG */
++#define FALCON_ATOMIC_INT_ADR_REG (FALCON_ATOMIC_BASE | 0xa)
++
++/*----------------------------------------------------------------------------
++ *
++ * PCI control blocks for Falcon -
++ * (P) primary is for NET
++ * (S) secondary is for CHAR
++ *
++ *---------------------------------------------------------------------------*/
++
++#define FALCON_P_CTR_AP_BAR 2
++#define FALCON_S_CTR_AP_BAR 0
++#define FALCON_S_DEVID 0x6703
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Falcon constants
++ *
++ *---------------------------------------------------------------------------*/
++
++/* Note: the following constants have moved to values in struct efhw_nic:
++ * FALCON_EVQ_TBL_NUM -> nic->num_evqs
++ * FALCON_DMAQ_NUM -> nic->num_dmaqs
++ * FALCON_TIMERS_NUM -> nic->num_times
++ * These replacement constants are used as sanity checks in assertions in
++ * certain functions that don't have access to struct efhw_nic.
++ */
++#define FALCON_DMAQ_NUM_SANITY (EFHW_4K)
++#define FALCON_EVQ_TBL_NUM_SANITY (EFHW_4K)
++#define FALCON_TIMERS_NUM_SANITY (EFHW_4K)
++
++/* This value is an upper limit on the total number of filter table
++ * entries. The actual size of filter table is determined at runtime, as
++ * it can vary.
++ */
++#define FALCON_FILTER_TBL_NUM (EFHW_8K)
++
++/* max number of buffers which can be pushed before commiting */
++#define FALCON_BUFFER_UPD_MAX (128)
++
++/* We can tell falcon to write its RX buffers in 32 byte quantums,
++ and since we pad packets 2 bytes to the right we can't use
++ a full page (not unless we use jumbo mode for all queues)
++
++ NOTE: tests/nic/dma.c assumes that the value here is the real NIC
++ value, so we explicitly round it down to the nearest 32 bytes */
++
++/* #define FALCON_RX_USR_BUF_SIZE round_down(4096-2,32) */
++#define FALCON_RX_USR_BUF_SIZE 4064
++
++#define FALCON_EVQ_RPTR_REG_P0 0x400
++
++/*----------------------------------------------------------------------------
++ *
++ * Falcon requires user-space descriptor pushes to be:
++ * dword[0-2]; wiob(); dword[3]
++ *
++ * Driver register access must be locked against other threads from
++ * the same driver but can be in any order: i.e dword[0-3]; wiob()
++ *
++ * The following helpers ensure that valid dword orderings are exercised
++ *
++ *---------------------------------------------------------------------------*/
++
++/* A union to allow writting 64bit values as 32bit values, without
++ * hitting the compilers aliasing rules. We hope the compiler optimises
++ * away the copy's anyway */
++union __u64to32 {
++ uint64_t u64;
++ struct {
++#ifdef EFHW_IS_LITTLE_ENDIAN
++ uint32_t a;
++ uint32_t b;
++#else
++ uint32_t b;
++ uint32_t a;
++#endif
++ } s;
++};
++
++static inline void
++falcon_write_ddd_d(volatile char __iomem *kva,
++ uint32_t d0, uint32_t d1, uint32_t d2, uint32_t d3)
++{
++ writel(d0, kva + 0);
++ writel(d1, kva + 4);
++ writel(d2, kva + 8);
++ mmiowb();
++ writel(d3, kva + 12);
++}
++
++static inline void falcon_write_q(volatile char __iomem *kva, uint64_t q)
++{
++ union __u64to32 u;
++ u.u64 = q;
++
++ writel(u.s.a, kva);
++ mmiowb();
++ writel(u.s.b, kva + 4);
++}
++
++static inline void falcon_read_q(volatile char __iomem *addr, uint64_t *q0)
++{
++ /* It is essential that we read dword0 first, so that
++ * the shadow register is updated with the latest value
++ * and we get a self consistent value.
++ */
++ union __u64to32 u;
++ u.s.a = readl(addr);
++ rmb();
++ u.s.b = readl(addr + 4);
++
++ *q0 = u.u64;
++}
++
++static inline void
++falcon_write_qq(volatile char __iomem *kva, uint64_t q0, uint64_t q1)
++{
++ writeq(q0, kva + 0);
++ falcon_write_q(kva + 8, q1);
++}
++
++static inline void
++falcon_read_qq(volatile char __iomem *addr, uint64_t *q0, uint64_t *q1)
++{
++ falcon_read_q(addr, q0);
++ *q1 = readq(addr + 8);
++}
++
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Buffer virtual addresses (4K buffers)
++ *
++ *---------------------------------------------------------------------------*/
++
++/* Form a buffer virtual address from buffer ID and offset. If the offset
++** is larger than the buffer size, then the buffer indexed will be
++** calculated appropriately. It is the responsibility of the caller to
++** ensure that they have valid buffers programmed at that address.
++*/
++#define FALCON_VADDR_8K_S (13)
++#define FALCON_VADDR_4K_S (12)
++#define FALCON_VADDR_M 0xfffff /* post shift mask */
++
++#define FALCON_BUFFER_8K_ADDR(id, off) (((id) << FALCON_VADDR_8K_S) + (off))
++#define FALCON_BUFFER_8K_PAGE(vaddr) \
++ (((vaddr) >> FALCON_VADDR_8K_S) & FALCON_VADDR_M)
++#define FALCON_BUFFER_8K_OFF(vaddr) \
++ ((vaddr) & __FALCON_MASK32(FALCON_VADDR_8K_S))
++
++#define FALCON_BUFFER_4K_ADDR(id, off) (((id) << FALCON_VADDR_4K_S) + (off))
++#define FALCON_BUFFER_4K_PAGE(vaddr) \
++ (((vaddr) >> FALCON_VADDR_4K_S) & FALCON_VADDR_M)
++#define FALCON_BUFFER_4K_OFF(vaddr) \
++ ((vaddr) & __FALCON_MASK32(FALCON_VADDR_4K_S))
++
++/*----------------------------------------------------------------------------
++ *
++ * Timer helpers
++ *
++ *---------------------------------------------------------------------------*/
++
++static inline int falcon_timer_page_addr(uint idx)
++{
++
++ EFHW_ASSERT(TIMER_CMD_REG_KER_OFST ==
++ (TIMER_CMD_REG_PAGE4_OFST - 4 * EFHW_8K));
++
++ EFHW_ASSERT(idx < FALCON_TIMERS_NUM_SANITY);
++
++ if (idx < 4)
++ return TIMER_CMD_REG_KER_OFST + (idx * EFHW_8K);
++ else if (idx < 1024)
++ return TIMER_CMD_REG_PAGE4_OFST + ((idx - 4) * EFHW_8K);
++ else
++ return TIMER_CMD_REG_PAGE123K_OFST + ((idx - 1024) * EFHW_8K);
++}
++
++#define FALCON_TIMER_PAGE_MASK (EFHW_8K-1)
++
++static inline int falcon_timer_page_offset(uint idx)
++{
++ return falcon_timer_page_addr(idx) & FALCON_TIMER_PAGE_MASK;
++}
++
++/*----------------------------------------------------------------------------
++ *
++ * DMA Queue helpers
++ *
++ *---------------------------------------------------------------------------*/
++
++/* iSCSI queue for A1; see bug 5427 for more details. */
++#define FALCON_A1_ISCSI_DMAQ 4
++
++/*! returns an address within a bar of the TX DMA doorbell */
++static inline uint falcon_tx_dma_page_addr(uint dmaq_idx)
++{
++ uint page;
++
++ EFHW_ASSERT((((TX_DESC_UPD_REG_PAGE123K_OFST) & (EFHW_8K - 1)) ==
++ (((TX_DESC_UPD_REG_PAGE4_OFST) & (EFHW_8K - 1)))));
++
++ EFHW_ASSERT(dmaq_idx < FALCON_DMAQ_NUM_SANITY);
++
++ if (dmaq_idx < 1024)
++ page = TX_DESC_UPD_REG_PAGE4_OFST + ((dmaq_idx - 4) * EFHW_8K);
++ else
++ page =
++ TX_DESC_UPD_REG_PAGE123K_OFST +
++ ((dmaq_idx - 1024) * EFHW_8K);
++
++ return page;
++}
++
++/*! returns an address within a bar of the RX DMA doorbell */
++static inline uint falcon_rx_dma_page_addr(uint dmaq_idx)
++{
++ uint page;
++
++ EFHW_ASSERT((((RX_DESC_UPD_REG_PAGE123K_OFST) & (EFHW_8K - 1)) ==
++ ((RX_DESC_UPD_REG_PAGE4_OFST) & (EFHW_8K - 1))));
++
++ EFHW_ASSERT(dmaq_idx < FALCON_DMAQ_NUM_SANITY);
++
++ if (dmaq_idx < 1024)
++ page = RX_DESC_UPD_REG_PAGE4_OFST + ((dmaq_idx - 4) * EFHW_8K);
++ else
++ page =
++ RX_DESC_UPD_REG_PAGE123K_OFST +
++ ((dmaq_idx - 1024) * EFHW_8K);
++
++ return page;
++}
++
++/*! "page"=NIC-dependent register set size */
++#define FALCON_DMA_PAGE_MASK (EFHW_8K-1)
++
++/*! returns an address within a bar of the start of the "page"
++ containing the TX DMA doorbell */
++static inline int falcon_tx_dma_page_base(uint dma_idx)
++{
++ return falcon_tx_dma_page_addr(dma_idx) & ~FALCON_DMA_PAGE_MASK;
++}
++
++/*! returns an address within a bar of the start of the "page"
++ containing the RX DMA doorbell */
++static inline int falcon_rx_dma_page_base(uint dma_idx)
++{
++ return falcon_rx_dma_page_addr(dma_idx) & ~FALCON_DMA_PAGE_MASK;
++}
++
++/*! returns an offset within a "page" of the TX DMA doorbell */
++static inline int falcon_tx_dma_page_offset(uint dma_idx)
++{
++ return falcon_tx_dma_page_addr(dma_idx) & FALCON_DMA_PAGE_MASK;
++}
++
++/*! returns an offset within a "page" of the RX DMA doorbell */
++static inline int falcon_rx_dma_page_offset(uint dma_idx)
++{
++ return falcon_rx_dma_page_addr(dma_idx) & FALCON_DMA_PAGE_MASK;
++}
++
++/*----------------------------------------------------------------------------
++ *
++ * Events
++ *
++ *---------------------------------------------------------------------------*/
++
++/* Falcon nails down the event queue mappings */
++#define FALCON_EVQ_KERNEL0 (0) /* hardwired for net driver */
++#define FALCON_EVQ_CHAR (4) /* char driver's event queue */
++
++/* reserved by the drivers */
++#define FALCON_EVQ_TBL_RESERVED (8)
++
++/* default DMA-Q sizes */
++#define FALCON_DMA_Q_DEFAULT_TX_SIZE 512
++
++#define FALCON_DMA_Q_DEFAULT_RX_SIZE 512
++
++#define FALCON_DMA_Q_DEFAULT_MMAP \
++ (FALCON_DMA_Q_DEFAULT_TX_SIZE * (FALCON_DMA_TX_DESC_BYTES * 2))
++
++/*----------------------------------------------------------------------------
++ *
++ * DEBUG - Analyser trigger
++ *
++ *---------------------------------------------------------------------------*/
++
++static inline void
++falcon_deadbeef(volatile char __iomem *efhw_kva, unsigned what)
++{
++ writel(what, efhw_kva + 0x300);
++ mmiowb();
++}
++#endif /* __CI_DRIVER_EFAB_HARDWARE_FALCON_H__ */
++/*! \cidoxg_end */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon/falcon_core.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon/falcon_core.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,1147 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides EtherFabric NIC - EFXXXX (aka Falcon) core register
++ * definitions.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#define FALCON_EXTENDED_P_BAR 1
++
++/*************---- Bus Interface Unit Registers C Header ----*************/
++#define IOM_IND_ADR_REG_OFST 0x0 /* IO-mapped indirect access address
++ register */
++ #define IOM_AUTO_ADR_INC_EN_LBN 16
++ #define IOM_AUTO_ADR_INC_EN_WIDTH 1
++ #define IOM_IND_ADR_LBN 0
++ #define IOM_IND_ADR_WIDTH 16
++#define IOM_IND_DAT_REG_OFST 0x4 /* IO-mapped indirect access data register */
++ #define IOM_IND_DAT_LBN 0
++ #define IOM_IND_DAT_WIDTH 32
++#define ADR_REGION_REG_KER_OFST 0x0 /* Address region register */
++#define ADR_REGION_REG_OFST 0x0 /* Address region register */
++ #define ADR_REGION3_LBN 96
++ #define ADR_REGION3_WIDTH 18
++ #define ADR_REGION2_LBN 64
++ #define ADR_REGION2_WIDTH 18
++ #define ADR_REGION1_LBN 32
++ #define ADR_REGION1_WIDTH 18
++ #define ADR_REGION0_LBN 0
++ #define ADR_REGION0_WIDTH 18
++#define INT_EN_REG_KER_OFST 0x10 /* Kernel driver Interrupt enable register */
++ #define KER_INT_CHAR_LBN 4
++ #define KER_INT_CHAR_WIDTH 1
++ #define KER_INT_KER_LBN 3
++ #define KER_INT_KER_WIDTH 1
++ #define ILL_ADR_ERR_INT_EN_KER_LBN 2
++ #define ILL_ADR_ERR_INT_EN_KER_WIDTH 1
++ #define SRM_PERR_INT_EN_KER_LBN 1
++ #define SRM_PERR_INT_EN_KER_WIDTH 1
++ #define DRV_INT_EN_KER_LBN 0
++ #define DRV_INT_EN_KER_WIDTH 1
++#define INT_EN_REG_CHAR_OFST 0x20 /* Char Driver interrupt enable register */
++ #define CHAR_INT_CHAR_LBN 4
++ #define CHAR_INT_CHAR_WIDTH 1
++ #define CHAR_INT_KER_LBN 3
++ #define CHAR_INT_KER_WIDTH 1
++ #define ILL_ADR_ERR_INT_EN_CHAR_LBN 2
++ #define ILL_ADR_ERR_INT_EN_CHAR_WIDTH 1
++ #define SRM_PERR_INT_EN_CHAR_LBN 1
++ #define SRM_PERR_INT_EN_CHAR_WIDTH 1
++ #define DRV_INT_EN_CHAR_LBN 0
++ #define DRV_INT_EN_CHAR_WIDTH 1
++#define INT_ADR_REG_KER_OFST 0x30 /* Interrupt host address for Kernel driver */
++ #define INT_ADR_KER_LBN 0
++ #define INT_ADR_KER_WIDTH 64
++ #define DRV_INT_KER_LBN 32
++ #define DRV_INT_KER_WIDTH 1
++ #define EV_FF_HALF_INT_KER_LBN 3
++ #define EV_FF_HALF_INT_KER_WIDTH 1
++ #define EV_FF_FULL_INT_KER_LBN 2
++ #define EV_FF_FULL_INT_KER_WIDTH 1
++ #define ILL_ADR_ERR_INT_KER_LBN 1
++ #define ILL_ADR_ERR_INT_KER_WIDTH 1
++ #define SRAM_PERR_INT_KER_LBN 0
++ #define SRAM_PERR_INT_KER_WIDTH 1
++#define INT_ADR_REG_CHAR_OFST 0x40 /* Interrupt host address for Char driver */
++ #define INT_ADR_CHAR_LBN 0
++ #define INT_ADR_CHAR_WIDTH 64
++ #define DRV_INT_CHAR_LBN 32
++ #define DRV_INT_CHAR_WIDTH 1
++ #define EV_FF_HALF_INT_CHAR_LBN 3
++ #define EV_FF_HALF_INT_CHAR_WIDTH 1
++ #define EV_FF_FULL_INT_CHAR_LBN 2
++ #define EV_FF_FULL_INT_CHAR_WIDTH 1
++ #define ILL_ADR_ERR_INT_CHAR_LBN 1
++ #define ILL_ADR_ERR_INT_CHAR_WIDTH 1
++ #define SRAM_PERR_INT_CHAR_LBN 0
++ #define SRAM_PERR_INT_CHAR_WIDTH 1
++#define INT_ISR0_B0_OFST 0x90 /* B0 only */
++#define INT_ISR1_B0_OFST 0xA0
++#define INT_ACK_REG_KER_A1_OFST 0x50 /* Kernel interrupt acknowledge register */
++ #define RESERVED_LBN 0
++ #define RESERVED_WIDTH 32
++#define INT_ACK_REG_CHAR_A1_OFST 0x60 /* CHAR interrupt acknowledge register */
++ #define RESERVED_LBN 0
++ #define RESERVED_WIDTH 32
++/*************---- Global CSR Registers C Header ----*************/
++#define NIC_STAT_REG_KER_OFST 0x200 /* ASIC strap status register */
++#define NIC_STAT_REG_OFST 0x200 /* ASIC strap status register */
++ #define ONCHIP_SRAM_LBN 16
++ #define ONCHIP_SRAM_WIDTH 0
++ #define STRAP_PINS_LBN 0
++ #define STRAP_PINS_WIDTH 3
++#define GPIO_CTL_REG_KER_OFST 0x210 /* GPIO control register */
++#define GPIO_CTL_REG_OFST 0x210 /* GPIO control register */
++ #define GPIO_OEN_LBN 24
++ #define GPIO_OEN_WIDTH 4
++ #define GPIO_OUT_LBN 16
++ #define GPIO_OUT_WIDTH 4
++ #define GPIO_IN_LBN 8
++ #define GPIO_IN_WIDTH 4
++ #define GPIO_PWRUP_VALUE_LBN 0
++ #define GPIO_PWRUP_VALUE_WIDTH 4
++#define GLB_CTL_REG_KER_OFST 0x220 /* Global control register */
++#define GLB_CTL_REG_OFST 0x220 /* Global control register */
++ #define SWRST_LBN 0
++ #define SWRST_WIDTH 1
++#define FATAL_INTR_REG_KER_OFST 0x230 /* Fatal interrupt register for Kernel */
++ #define PCI_BUSERR_INT_KER_EN_LBN 43
++ #define PCI_BUSERR_INT_KER_EN_WIDTH 1
++ #define SRAM_OOB_INT_KER_EN_LBN 42
++ #define SRAM_OOB_INT_KER_EN_WIDTH 1
++ #define BUFID_OOB_INT_KER_EN_LBN 41
++ #define BUFID_OOB_INT_KER_EN_WIDTH 1
++ #define MEM_PERR_INT_KER_EN_LBN 40
++ #define MEM_PERR_INT_KER_EN_WIDTH 1
++ #define RBUF_OWN_INT_KER_EN_LBN 39
++ #define RBUF_OWN_INT_KER_EN_WIDTH 1
++ #define TBUF_OWN_INT_KER_EN_LBN 38
++ #define TBUF_OWN_INT_KER_EN_WIDTH 1
++ #define RDESCQ_OWN_INT_KER_EN_LBN 37
++ #define RDESCQ_OWN_INT_KER_EN_WIDTH 1
++ #define TDESCQ_OWN_INT_KER_EN_LBN 36
++ #define TDESCQ_OWN_INT_KER_EN_WIDTH 1
++ #define EVQ_OWN_INT_KER_EN_LBN 35
++ #define EVQ_OWN_INT_KER_EN_WIDTH 1
++ #define EVFF_OFLO_INT_KER_EN_LBN 34
++ #define EVFF_OFLO_INT_KER_EN_WIDTH 1
++ #define ILL_ADR_INT_KER_EN_LBN 33
++ #define ILL_ADR_INT_KER_EN_WIDTH 1
++ #define SRM_PERR_INT_KER_EN_LBN 32
++ #define SRM_PERR_INT_KER_EN_WIDTH 1
++ #define PCI_BUSERR_INT_KER_LBN 11
++ #define PCI_BUSERR_INT_KER_WIDTH 1
++ #define SRAM_OOB_INT_KER_LBN 10
++ #define SRAM_OOB_INT_KER_WIDTH 1
++ #define BUFID_OOB_INT_KER_LBN 9
++ #define BUFID_OOB_INT_KER_WIDTH 1
++ #define MEM_PERR_INT_KER_LBN 8
++ #define MEM_PERR_INT_KER_WIDTH 1
++ #define RBUF_OWN_INT_KER_LBN 7
++ #define RBUF_OWN_INT_KER_WIDTH 1
++ #define TBUF_OWN_INT_KER_LBN 6
++ #define TBUF_OWN_INT_KER_WIDTH 1
++ #define RDESCQ_OWN_INT_KER_LBN 5
++ #define RDESCQ_OWN_INT_KER_WIDTH 1
++ #define TDESCQ_OWN_INT_KER_LBN 4
++ #define TDESCQ_OWN_INT_KER_WIDTH 1
++ #define EVQ_OWN_INT_KER_LBN 3
++ #define EVQ_OWN_INT_KER_WIDTH 1
++ #define EVFF_OFLO_INT_KER_LBN 2
++ #define EVFF_OFLO_INT_KER_WIDTH 1
++ #define ILL_ADR_INT_KER_LBN 1
++ #define ILL_ADR_INT_KER_WIDTH 1
++ #define SRM_PERR_INT_KER_LBN 0
++ #define SRM_PERR_INT_KER_WIDTH 1
++#define FATAL_INTR_REG_OFST 0x240 /* Fatal interrupt register for Char */
++ #define PCI_BUSERR_INT_CHAR_EN_LBN 43
++ #define PCI_BUSERR_INT_CHAR_EN_WIDTH 1
++ #define SRAM_OOB_INT_CHAR_EN_LBN 42
++ #define SRAM_OOB_INT_CHAR_EN_WIDTH 1
++ #define BUFID_OOB_INT_CHAR_EN_LBN 41
++ #define BUFID_OOB_INT_CHAR_EN_WIDTH 1
++ #define MEM_PERR_INT_CHAR_EN_LBN 40
++ #define MEM_PERR_INT_CHAR_EN_WIDTH 1
++ #define RBUF_OWN_INT_CHAR_EN_LBN 39
++ #define RBUF_OWN_INT_CHAR_EN_WIDTH 1
++ #define TBUF_OWN_INT_CHAR_EN_LBN 38
++ #define TBUF_OWN_INT_CHAR_EN_WIDTH 1
++ #define RDESCQ_OWN_INT_CHAR_EN_LBN 37
++ #define RDESCQ_OWN_INT_CHAR_EN_WIDTH 1
++ #define TDESCQ_OWN_INT_CHAR_EN_LBN 36
++ #define TDESCQ_OWN_INT_CHAR_EN_WIDTH 1
++ #define EVQ_OWN_INT_CHAR_EN_LBN 35
++ #define EVQ_OWN_INT_CHAR_EN_WIDTH 1
++ #define EVFF_OFLO_INT_CHAR_EN_LBN 34
++ #define EVFF_OFLO_INT_CHAR_EN_WIDTH 1
++ #define ILL_ADR_INT_CHAR_EN_LBN 33
++ #define ILL_ADR_INT_CHAR_EN_WIDTH 1
++ #define SRM_PERR_INT_CHAR_EN_LBN 32
++ #define SRM_PERR_INT_CHAR_EN_WIDTH 1
++ #define FATAL_INTR_REG_EN_BITS 0xffffffffffffffffULL
++ #define PCI_BUSERR_INT_CHAR_LBN 11
++ #define PCI_BUSERR_INT_CHAR_WIDTH 1
++ #define SRAM_OOB_INT_CHAR_LBN 10
++ #define SRAM_OOB_INT_CHAR_WIDTH 1
++ #define BUFID_OOB_INT_CHAR_LBN 9
++ #define BUFID_OOB_INT_CHAR_WIDTH 1
++ #define MEM_PERR_INT_CHAR_LBN 8
++ #define MEM_PERR_INT_CHAR_WIDTH 1
++ #define RBUF_OWN_INT_CHAR_LBN 7
++ #define RBUF_OWN_INT_CHAR_WIDTH 1
++ #define TBUF_OWN_INT_CHAR_LBN 6
++ #define TBUF_OWN_INT_CHAR_WIDTH 1
++ #define RDESCQ_OWN_INT_CHAR_LBN 5
++ #define RDESCQ_OWN_INT_CHAR_WIDTH 1
++ #define TDESCQ_OWN_INT_CHAR_LBN 4
++ #define TDESCQ_OWN_INT_CHAR_WIDTH 1
++ #define EVQ_OWN_INT_CHAR_LBN 3
++ #define EVQ_OWN_INT_CHAR_WIDTH 1
++ #define EVFF_OFLO_INT_CHAR_LBN 2
++ #define EVFF_OFLO_INT_CHAR_WIDTH 1
++ #define ILL_ADR_INT_CHAR_LBN 1
++ #define ILL_ADR_INT_CHAR_WIDTH 1
++ #define SRM_PERR_INT_CHAR_LBN 0
++ #define SRM_PERR_INT_CHAR_WIDTH 1
++#define DP_CTRL_REG_OFST 0x250 /* Datapath control register */
++ #define FLS_EVQ_ID_LBN 0
++ #define FLS_EVQ_ID_WIDTH 12
++#define MEM_STAT_REG_KER_OFST 0x260 /* Memory status register */
++#define MEM_STAT_REG_OFST 0x260 /* Memory status register */
++ #define MEM_PERR_VEC_LBN 53
++ #define MEM_PERR_VEC_WIDTH 38
++ #define MBIST_CORR_LBN 38
++ #define MBIST_CORR_WIDTH 15
++ #define MBIST_ERR_LBN 0
++ #define MBIST_ERR_WIDTH 38
++#define DEBUG_REG_KER_OFST 0x270 /* Debug register */
++#define DEBUG_REG_OFST 0x270 /* Debug register */
++ #define DEBUG_BLK_SEL2_LBN 47
++ #define DEBUG_BLK_SEL2_WIDTH 3
++ #define DEBUG_BLK_SEL1_LBN 44
++ #define DEBUG_BLK_SEL1_WIDTH 3
++ #define DEBUG_BLK_SEL0_LBN 41
++ #define DEBUG_BLK_SEL0_WIDTH 3
++ #define MISC_DEBUG_ADDR_LBN 36
++ #define MISC_DEBUG_ADDR_WIDTH 5
++ #define SERDES_DEBUG_ADDR_LBN 31
++ #define SERDES_DEBUG_ADDR_WIDTH 5
++ #define EM_DEBUG_ADDR_LBN 26
++ #define EM_DEBUG_ADDR_WIDTH 5
++ #define SR_DEBUG_ADDR_LBN 21
++ #define SR_DEBUG_ADDR_WIDTH 5
++ #define EV_DEBUG_ADDR_LBN 16
++ #define EV_DEBUG_ADDR_WIDTH 5
++ #define RX_DEBUG_ADDR_LBN 11
++ #define RX_DEBUG_ADDR_WIDTH 5
++ #define TX_DEBUG_ADDR_LBN 6
++ #define TX_DEBUG_ADDR_WIDTH 5
++ #define BIU_DEBUG_ADDR_LBN 1
++ #define BIU_DEBUG_ADDR_WIDTH 5
++ #define DEBUG_EN_LBN 0
++ #define DEBUG_EN_WIDTH 1
++#define DRIVER_REG0_KER_OFST 0x280 /* Driver scratch register 0 */
++#define DRIVER_REG0_OFST 0x280 /* Driver scratch register 0 */
++ #define DRIVER_DW0_LBN 0
++ #define DRIVER_DW0_WIDTH 32
++#define DRIVER_REG1_KER_OFST 0x290 /* Driver scratch register 1 */
++#define DRIVER_REG1_OFST 0x290 /* Driver scratch register 1 */
++ #define DRIVER_DW1_LBN 0
++ #define DRIVER_DW1_WIDTH 32
++#define DRIVER_REG2_KER_OFST 0x2A0 /* Driver scratch register 2 */
++#define DRIVER_REG2_OFST 0x2A0 /* Driver scratch register 2 */
++ #define DRIVER_DW2_LBN 0
++ #define DRIVER_DW2_WIDTH 32
++#define DRIVER_REG3_KER_OFST 0x2B0 /* Driver scratch register 3 */
++#define DRIVER_REG3_OFST 0x2B0 /* Driver scratch register 3 */
++ #define DRIVER_DW3_LBN 0
++ #define DRIVER_DW3_WIDTH 32
++#define DRIVER_REG4_KER_OFST 0x2C0 /* Driver scratch register 4 */
++#define DRIVER_REG4_OFST 0x2C0 /* Driver scratch register 4 */
++ #define DRIVER_DW4_LBN 0
++ #define DRIVER_DW4_WIDTH 32
++#define DRIVER_REG5_KER_OFST 0x2D0 /* Driver scratch register 5 */
++#define DRIVER_REG5_OFST 0x2D0 /* Driver scratch register 5 */
++ #define DRIVER_DW5_LBN 0
++ #define DRIVER_DW5_WIDTH 32
++#define DRIVER_REG6_KER_OFST 0x2E0 /* Driver scratch register 6 */
++#define DRIVER_REG6_OFST 0x2E0 /* Driver scratch register 6 */
++ #define DRIVER_DW6_LBN 0
++ #define DRIVER_DW6_WIDTH 32
++#define DRIVER_REG7_KER_OFST 0x2F0 /* Driver scratch register 7 */
++#define DRIVER_REG7_OFST 0x2F0 /* Driver scratch register 7 */
++ #define DRIVER_DW7_LBN 0
++ #define DRIVER_DW7_WIDTH 32
++#define ALTERA_BUILD_REG_OFST 0x300 /* Altera build register */
++#define ALTERA_BUILD_REG_OFST 0x300 /* Altera build register */
++ #define ALTERA_BUILD_VER_LBN 0
++ #define ALTERA_BUILD_VER_WIDTH 32
++
++/* so called CSR spare register
++ - contains separate parity enable bits for the various internal memory
++ blocks */
++#define MEM_PARITY_ERR_EN_REG_KER 0x310
++#define MEM_PARITY_ALL_BLOCKS_EN_LBN 64
++#define MEM_PARITY_ALL_BLOCKS_EN_WIDTH 38
++#define MEM_PARITY_TX_DATA_EN_LBN 72
++#define MEM_PARITY_TX_DATA_EN_WIDTH 2
++
++/*************---- Event & Timer Module Registers C Header ----*************/
++
++#if FALCON_EXTENDED_P_BAR
++#define EVQ_RPTR_REG_KER_OFST 0x11B00 /* Event queue read pointer register */
++#else
++#define EVQ_RPTR_REG_KER_OFST 0x1B00 /* Event queue read pointer register */
++#endif
++
++#define EVQ_RPTR_REG_OFST 0xFA0000 /* Event queue read pointer register
++ array. */
++ #define EVQ_RPTR_LBN 0
++ #define EVQ_RPTR_WIDTH 15
++
++#if FALCON_EXTENDED_P_BAR
++#define EVQ_PTR_TBL_KER_OFST 0x11A00 /* Event queue pointer table for kernel
++ access */
++#else
++#define EVQ_PTR_TBL_KER_OFST 0x1A00 /* Event queue pointer table for kernel
++ access */
++#endif
++
++#define EVQ_PTR_TBL_CHAR_OFST 0xF60000 /* Event queue pointer table for char
++ direct access */
++ #define EVQ_WKUP_OR_INT_EN_LBN 39
++ #define EVQ_WKUP_OR_INT_EN_WIDTH 1
++ #define EVQ_NXT_WPTR_LBN 24
++ #define EVQ_NXT_WPTR_WIDTH 15
++ #define EVQ_EN_LBN 23
++ #define EVQ_EN_WIDTH 1
++ #define EVQ_SIZE_LBN 20
++ #define EVQ_SIZE_WIDTH 3
++ #define EVQ_BUF_BASE_ID_LBN 0
++ #define EVQ_BUF_BASE_ID_WIDTH 20
++#define TIMER_CMD_REG_KER_OFST 0x420 /* Timer table for kernel access.
++ Page-mapped */
++#define TIMER_CMD_REG_PAGE4_OFST 0x8420 /* Timer table for user-level access.
++ Page-mapped. For lowest 1K queues.
++ */
++#define TIMER_CMD_REG_PAGE123K_OFST 0x1000420 /* Timer table for user-level
++ access. Page-mapped.
++ For upper 3K queues. */
++#define TIMER_TBL_OFST 0xF70000 /* Timer table for char driver direct access */
++ #define TIMER_MODE_LBN 12
++ #define TIMER_MODE_WIDTH 2
++ #define TIMER_VAL_LBN 0
++ #define TIMER_VAL_WIDTH 12
++ #define TIMER_MODE_INT_HLDOFF 2
++ #define EVQ_BUF_SIZE_LBN 0
++ #define EVQ_BUF_SIZE_WIDTH 1
++#define DRV_EV_REG_KER_OFST 0x440 /* Driver generated event register */
++#define DRV_EV_REG_OFST 0x440 /* Driver generated event register */
++ #define DRV_EV_QID_LBN 64
++ #define DRV_EV_QID_WIDTH 12
++ #define DRV_EV_DATA_LBN 0
++ #define DRV_EV_DATA_WIDTH 64
++#define EVQ_CTL_REG_KER_OFST 0x450 /* Event queue control register */
++#define EVQ_CTL_REG_OFST 0x450 /* Event queue control register */
++ #define RX_EVQ_WAKEUP_MASK_B0_LBN 15
++ #define RX_EVQ_WAKEUP_MASK_B0_WIDTH 6
++ #define EVQ_OWNERR_CTL_LBN 14
++ #define EVQ_OWNERR_CTL_WIDTH 1
++ #define EVQ_FIFO_AF_TH_LBN 8
++ #define EVQ_FIFO_AF_TH_WIDTH 6
++ #define EVQ_FIFO_NOTAF_TH_LBN 0
++ #define EVQ_FIFO_NOTAF_TH_WIDTH 6
++/*************---- SRAM Module Registers C Header ----*************/
++#define BUF_TBL_CFG_REG_KER_OFST 0x600 /* Buffer table configuration register */
++#define BUF_TBL_CFG_REG_OFST 0x600 /* Buffer table configuration register */
++ #define BUF_TBL_MODE_LBN 3
++ #define BUF_TBL_MODE_WIDTH 1
++#define SRM_RX_DC_CFG_REG_KER_OFST 0x610 /* SRAM receive descriptor cache
++ configuration register */
++#define SRM_RX_DC_CFG_REG_OFST 0x610 /* SRAM receive descriptor cache
++ configuration register */
++ #define SRM_RX_DC_BASE_ADR_LBN 0
++ #define SRM_RX_DC_BASE_ADR_WIDTH 21
++#define SRM_TX_DC_CFG_REG_KER_OFST 0x620 /* SRAM transmit descriptor cache
++ configuration register */
++#define SRM_TX_DC_CFG_REG_OFST 0x620 /* SRAM transmit descriptor cache
++ configuration register */
++ #define SRM_TX_DC_BASE_ADR_LBN 0
++ #define SRM_TX_DC_BASE_ADR_WIDTH 21
++#define SRM_CFG_REG_KER_OFST 0x630 /* SRAM configuration register */
++#define SRM_CFG_REG_OFST 0x630 /* SRAM configuration register */
++ #define SRAM_OOB_ADR_INTEN_LBN 5
++ #define SRAM_OOB_ADR_INTEN_WIDTH 1
++ #define SRAM_OOB_BUF_INTEN_LBN 4
++ #define SRAM_OOB_BUF_INTEN_WIDTH 1
++ #define SRAM_BT_INIT_EN_LBN 3
++ #define SRAM_BT_INIT_EN_WIDTH 1
++ #define SRM_NUM_BANK_LBN 2
++ #define SRM_NUM_BANK_WIDTH 1
++ #define SRM_BANK_SIZE_LBN 0
++ #define SRM_BANK_SIZE_WIDTH 2
++#define BUF_TBL_UPD_REG_KER_OFST 0x650 /* Buffer table update register */
++#define BUF_TBL_UPD_REG_OFST 0x650 /* Buffer table update register */
++ #define BUF_UPD_CMD_LBN 63
++ #define BUF_UPD_CMD_WIDTH 1
++ #define BUF_CLR_CMD_LBN 62
++ #define BUF_CLR_CMD_WIDTH 1
++ #define BUF_CLR_END_ID_LBN 32
++ #define BUF_CLR_END_ID_WIDTH 20
++ #define BUF_CLR_START_ID_LBN 0
++ #define BUF_CLR_START_ID_WIDTH 20
++#define SRM_UPD_EVQ_REG_KER_OFST 0x660 /* Buffer table update register */
++#define SRM_UPD_EVQ_REG_OFST 0x660 /* Buffer table update register */
++ #define SRM_UPD_EVQ_ID_LBN 0
++ #define SRM_UPD_EVQ_ID_WIDTH 12
++#define SRAM_PARITY_REG_KER_OFST 0x670 /* SRAM parity register. */
++#define SRAM_PARITY_REG_OFST 0x670 /* SRAM parity register. */
++ #define FORCE_SRAM_PERR_LBN 0
++ #define FORCE_SRAM_PERR_WIDTH 1
++
++#if FALCON_EXTENDED_P_BAR
++#define BUF_HALF_TBL_KER_OFST 0x18000 /* Buffer table in half buffer table
++ mode direct access by kernel driver */
++#else
++#define BUF_HALF_TBL_KER_OFST 0x8000 /* Buffer table in half buffer table
++ mode direct access by kernel driver */
++#endif
++
++
++#define BUF_HALF_TBL_OFST 0x800000 /* Buffer table in half buffer table mode
++ direct access by char driver */
++ #define BUF_ADR_HBUF_ODD_LBN 44
++ #define BUF_ADR_HBUF_ODD_WIDTH 20
++ #define BUF_OWNER_ID_HBUF_ODD_LBN 32
++ #define BUF_OWNER_ID_HBUF_ODD_WIDTH 12
++ #define BUF_ADR_HBUF_EVEN_LBN 12
++ #define BUF_ADR_HBUF_EVEN_WIDTH 20
++ #define BUF_OWNER_ID_HBUF_EVEN_LBN 0
++ #define BUF_OWNER_ID_HBUF_EVEN_WIDTH 12
++
++
++#if FALCON_EXTENDED_P_BAR
++#define BUF_FULL_TBL_KER_OFST 0x18000 /* Buffer table in full buffer table
++ mode direct access by kernel driver */
++#else
++#define BUF_FULL_TBL_KER_OFST 0x8000 /* Buffer table in full buffer table mode
++ direct access by kernel driver */
++#endif
++
++
++
++
++#define BUF_FULL_TBL_OFST 0x800000 /* Buffer table in full buffer table mode
++ direct access by char driver */
++ #define IP_DAT_BUF_SIZE_LBN 50
++ #define IP_DAT_BUF_SIZE_WIDTH 1
++ #define BUF_ADR_REGION_LBN 48
++ #define BUF_ADR_REGION_WIDTH 2
++ #define BUF_ADR_FBUF_LBN 14
++ #define BUF_ADR_FBUF_WIDTH 34
++ #define BUF_OWNER_ID_FBUF_LBN 0
++ #define BUF_OWNER_ID_FBUF_WIDTH 14
++#define SRM_DBG_REG_OFST 0x3000000 /* SRAM debug access */
++ #define SRM_DBG_LBN 0
++ #define SRM_DBG_WIDTH 64
++/*************---- RX Datapath Registers C Header ----*************/
++
++#define RX_CFG_REG_KER_OFST 0x800 /* Receive configuration register */
++#define RX_CFG_REG_OFST 0x800 /* Receive configuration register */
++
++#if !defined(FALCON_64K_RXFIFO) && !defined(FALCON_PRE_02020029)
++# if !defined(FALCON_128K_RXFIFO)
++# define FALCON_128K_RXFIFO
++# endif
++#endif
++
++#if defined(FALCON_128K_RXFIFO)
++
++/* new for B0 */
++ #define RX_TOEP_TCP_SUPPRESS_B0_LBN 48
++ #define RX_TOEP_TCP_SUPPRESS_B0_WIDTH 1
++ #define RX_INGR_EN_B0_LBN 47
++ #define RX_INGR_EN_B0_WIDTH 1
++ #define RX_TOEP_IPV4_B0_LBN 46
++ #define RX_TOEP_IPV4_B0_WIDTH 1
++ #define RX_HASH_ALG_B0_LBN 45
++ #define RX_HASH_ALG_B0_WIDTH 1
++ #define RX_HASH_INSERT_HDR_B0_LBN 44
++ #define RX_HASH_INSERT_HDR_B0_WIDTH 1
++/* moved for B0 */
++ #define RX_DESC_PUSH_EN_B0_LBN 43
++ #define RX_DESC_PUSH_EN_B0_WIDTH 1
++ #define RX_RDW_PATCH_EN_LBN 42 /* Non head of line blocking */
++ #define RX_RDW_PATCH_EN_WIDTH 1
++ #define RX_PCI_BURST_SIZE_B0_LBN 39
++ #define RX_PCI_BURST_SIZE_B0_WIDTH 3
++ #define RX_OWNERR_CTL_B0_LBN 38
++ #define RX_OWNERR_CTL_B0_WIDTH 1
++ #define RX_XON_TX_TH_B0_LBN 33
++ #define RX_XON_TX_TH_B0_WIDTH 5
++ #define RX_XOFF_TX_TH_B0_LBN 28
++ #define RX_XOFF_TX_TH_B0_WIDTH 5
++ #define RX_USR_BUF_SIZE_B0_LBN 19
++ #define RX_USR_BUF_SIZE_B0_WIDTH 9
++ #define RX_XON_MAC_TH_B0_LBN 10
++ #define RX_XON_MAC_TH_B0_WIDTH 9
++ #define RX_XOFF_MAC_TH_B0_LBN 1
++ #define RX_XOFF_MAC_TH_B0_WIDTH 9
++ #define RX_XOFF_MAC_EN_B0_LBN 0
++ #define RX_XOFF_MAC_EN_B0_WIDTH 1
++
++#elif !defined(FALCON_PRE_02020029)
++/* new for B0 */
++ #define RX_TOEP_TCP_SUPPRESS_B0_LBN 46
++ #define RX_TOEP_TCP_SUPPRESS_B0_WIDTH 1
++ #define RX_INGR_EN_B0_LBN 45
++ #define RX_INGR_EN_B0_WIDTH 1
++ #define RX_TOEP_IPV4_B0_LBN 44
++ #define RX_TOEP_IPV4_B0_WIDTH 1
++ #define RX_HASH_ALG_B0_LBN 43
++ #define RX_HASH_ALG_B0_WIDTH 41
++ #define RX_HASH_INSERT_HDR_B0_LBN 42
++ #define RX_HASH_INSERT_HDR_B0_WIDTH 1
++/* moved for B0 */
++ #define RX_DESC_PUSH_EN_B0_LBN 41
++ #define RX_DESC_PUSH_EN_B0_WIDTH 1
++ #define RX_PCI_BURST_SIZE_B0_LBN 37
++ #define RX_PCI_BURST_SIZE_B0_WIDTH 3
++ #define RX_OWNERR_CTL_B0_LBN 36
++ #define RX_OWNERR_CTL_B0_WIDTH 1
++ #define RX_XON_TX_TH_B0_LBN 31
++ #define RX_XON_TX_TH_B0_WIDTH 5
++ #define RX_XOFF_TX_TH_B0_LBN 26
++ #define RX_XOFF_TX_TH_B0_WIDTH 5
++ #define RX_USR_BUF_SIZE_B0_LBN 17
++ #define RX_USR_BUF_SIZE_B0_WIDTH 9
++ #define RX_XON_MAC_TH_B0_LBN 9
++ #define RX_XON_MAC_TH_B0_WIDTH 8
++ #define RX_XOFF_MAC_TH_B0_LBN 1
++ #define RX_XOFF_MAC_TH_B0_WIDTH 8
++ #define RX_XOFF_MAC_EN_B0_LBN 0
++ #define RX_XOFF_MAC_EN_B0_WIDTH 1
++
++#else
++/* new for B0 */
++ #define RX_TOEP_TCP_SUPPRESS_B0_LBN 44
++ #define RX_TOEP_TCP_SUPPRESS_B0_WIDTH 1
++ #define RX_INGR_EN_B0_LBN 43
++ #define RX_INGR_EN_B0_WIDTH 1
++ #define RX_TOEP_IPV4_B0_LBN 42
++ #define RX_TOEP_IPV4_B0_WIDTH 1
++ #define RX_HASH_ALG_B0_LBN 41
++ #define RX_HASH_ALG_B0_WIDTH 41
++ #define RX_HASH_INSERT_HDR_B0_LBN 40
++ #define RX_HASH_INSERT_HDR_B0_WIDTH 1
++/* moved for B0 */
++ #define RX_DESC_PUSH_EN_B0_LBN 35
++ #define RX_DESC_PUSH_EN_B0_WIDTH 1
++ #define RX_PCI_BURST_SIZE_B0_LBN 35
++ #define RX_PCI_BURST_SIZE_B0_WIDTH 2
++ #define RX_OWNERR_CTL_B0_LBN 34
++ #define RX_OWNERR_CTL_B0_WIDTH 1
++ #define RX_XON_TX_TH_B0_LBN 29
++ #define RX_XON_TX_TH_B0_WIDTH 5
++ #define RX_XOFF_TX_TH_B0_LBN 24
++ #define RX_XOFF_TX_TH_B0_WIDTH 5
++ #define RX_USR_BUF_SIZE_B0_LBN 15
++ #define RX_USR_BUF_SIZE_B0_WIDTH 9
++ #define RX_XON_MAC_TH_B0_LBN 8
++ #define RX_XON_MAC_TH_B0_WIDTH 7
++ #define RX_XOFF_MAC_TH_B0_LBN 1
++ #define RX_XOFF_MAC_TH_B0_WIDTH 7
++ #define RX_XOFF_MAC_EN_B0_LBN 0
++ #define RX_XOFF_MAC_EN_B0_WIDTH 1
++
++#endif
++
++/* A0/A1 */
++ #define RX_PUSH_EN_A1_LBN 35
++ #define RX_PUSH_EN_A1_WIDTH 1
++ #define RX_PCI_BURST_SIZE_A1_LBN 31
++ #define RX_PCI_BURST_SIZE_A1_WIDTH 3
++ #define RX_OWNERR_CTL_A1_LBN 30
++ #define RX_OWNERR_CTL_A1_WIDTH 1
++ #define RX_XON_TX_TH_A1_LBN 25
++ #define RX_XON_TX_TH_A1_WIDTH 5
++ #define RX_XOFF_TX_TH_A1_LBN 20
++ #define RX_XOFF_TX_TH_A1_WIDTH 5
++ #define RX_USR_BUF_SIZE_A1_LBN 11
++ #define RX_USR_BUF_SIZE_A1_WIDTH 9
++ #define RX_XON_MAC_TH_A1_LBN 6
++ #define RX_XON_MAC_TH_A1_WIDTH 5
++ #define RX_XOFF_MAC_TH_A1_LBN 1
++ #define RX_XOFF_MAC_TH_A1_WIDTH 5
++ #define RX_XOFF_MAC_EN_A1_LBN 0
++ #define RX_XOFF_MAC_EN_A1_WIDTH 1
++
++#define RX_FILTER_CTL_REG_OFST 0x810 /* Receive filter control registers */
++ #define SCATTER_ENBL_NO_MATCH_Q_B0_LBN 40
++ #define SCATTER_ENBL_NO_MATCH_Q_B0_WIDTH 1
++ #define UDP_FULL_SRCH_LIMIT_LBN 32
++ #define UDP_FULL_SRCH_LIMIT_WIDTH 8
++ #define NUM_KER_LBN 24
++ #define NUM_KER_WIDTH 2
++ #define UDP_WILD_SRCH_LIMIT_LBN 16
++ #define UDP_WILD_SRCH_LIMIT_WIDTH 8
++ #define TCP_WILD_SRCH_LIMIT_LBN 8
++ #define TCP_WILD_SRCH_LIMIT_WIDTH 8
++ #define TCP_FULL_SRCH_LIMIT_LBN 0
++ #define TCP_FULL_SRCH_LIMIT_WIDTH 8
++#define RX_FLUSH_DESCQ_REG_KER_OFST 0x820 /* Receive flush descriptor queue
++ register */
++#define RX_FLUSH_DESCQ_REG_OFST 0x820 /* Receive flush descriptor queue
++ register */
++ #define RX_FLUSH_DESCQ_CMD_LBN 24
++ #define RX_FLUSH_DESCQ_CMD_WIDTH 1
++ #define RX_FLUSH_EVQ_ID_LBN 12
++ #define RX_FLUSH_EVQ_ID_WIDTH 12
++ #define RX_FLUSH_DESCQ_LBN 0
++ #define RX_FLUSH_DESCQ_WIDTH 12
++#define RX_DESC_UPD_REG_KER_OFST 0x830 /* Kernel receive descriptor update
++ register. Page-mapped */
++#define RX_DESC_UPD_REG_PAGE4_OFST 0x8830 /* Char & user receive descriptor
++ update register. Page-mapped.
++ For lowest 1K queues. */
++#define RX_DESC_UPD_REG_PAGE123K_OFST 0x1000830 /* Char & user receive
++ descriptor update register.
++ Page-mapped. For upper
++ 3K queues. */
++ #define RX_DESC_WPTR_LBN 96
++ #define RX_DESC_WPTR_WIDTH 12
++ #define RX_DESC_PUSH_CMD_LBN 95
++ #define RX_DESC_PUSH_CMD_WIDTH 1
++ #define RX_DESC_LBN 0
++ #define RX_DESC_WIDTH 64
++ #define RX_KER_DESC_LBN 0
++ #define RX_KER_DESC_WIDTH 64
++ #define RX_USR_DESC_LBN 0
++ #define RX_USR_DESC_WIDTH 32
++#define RX_DC_CFG_REG_KER_OFST 0x840 /* Receive descriptor cache
++ configuration register */
++#define RX_DC_CFG_REG_OFST 0x840 /* Receive descriptor cache
++ configuration register */
++ #define RX_DC_SIZE_LBN 0
++ #define RX_DC_SIZE_WIDTH 2
++#define RX_DC_PF_WM_REG_KER_OFST 0x850 /* Receive descriptor cache pre-fetch
++ watermark register */
++#define RX_DC_PF_WM_REG_OFST 0x850 /* Receive descriptor cache pre-fetch
++ watermark register */
++ #define RX_DC_PF_LWM_LO_LBN 0
++ #define RX_DC_PF_LWM_LO_WIDTH 6
++
++#define RX_RSS_TKEY_B0_OFST 0x860 /* RSS Toeplitz hash key (B0 only) */
++
++#define RX_NODESC_DROP_REG 0x880
++ #define RX_NODESC_DROP_CNT_LBN 0
++ #define RX_NODESC_DROP_CNT_WIDTH 16
++
++#define XM_TX_CFG_REG_OFST 0x1230
++ #define XM_AUTO_PAD_LBN 5
++ #define XM_AUTO_PAD_WIDTH 1
++
++#define RX_FILTER_TBL0_OFST 0xF00000 /* Receive filter table - even entries */
++ #define RSS_EN_0_B0_LBN 110
++ #define RSS_EN_0_B0_WIDTH 1
++ #define SCATTER_EN_0_B0_LBN 109
++ #define SCATTER_EN_0_B0_WIDTH 1
++ #define TCP_UDP_0_LBN 108
++ #define TCP_UDP_0_WIDTH 1
++ #define RXQ_ID_0_LBN 96
++ #define RXQ_ID_0_WIDTH 12
++ #define DEST_IP_0_LBN 64
++ #define DEST_IP_0_WIDTH 32
++ #define DEST_PORT_TCP_0_LBN 48
++ #define DEST_PORT_TCP_0_WIDTH 16
++ #define SRC_IP_0_LBN 16
++ #define SRC_IP_0_WIDTH 32
++ #define SRC_TCP_DEST_UDP_0_LBN 0
++ #define SRC_TCP_DEST_UDP_0_WIDTH 16
++#define RX_FILTER_TBL1_OFST 0xF00010 /* Receive filter table - odd entries */
++ #define RSS_EN_1_B0_LBN 110
++ #define RSS_EN_1_B0_WIDTH 1
++ #define SCATTER_EN_1_B0_LBN 109
++ #define SCATTER_EN_1_B0_WIDTH 1
++ #define TCP_UDP_1_LBN 108
++ #define TCP_UDP_1_WIDTH 1
++ #define RXQ_ID_1_LBN 96
++ #define RXQ_ID_1_WIDTH 12
++ #define DEST_IP_1_LBN 64
++ #define DEST_IP_1_WIDTH 32
++ #define DEST_PORT_TCP_1_LBN 48
++ #define DEST_PORT_TCP_1_WIDTH 16
++ #define SRC_IP_1_LBN 16
++ #define SRC_IP_1_WIDTH 32
++ #define SRC_TCP_DEST_UDP_1_LBN 0
++ #define SRC_TCP_DEST_UDP_1_WIDTH 16
++
++#if FALCON_EXTENDED_P_BAR
++#define RX_DESC_PTR_TBL_KER_OFST 0x11800 /* Receive descriptor pointer
++ kernel access */
++#else
++#define RX_DESC_PTR_TBL_KER_OFST 0x1800 /* Receive descriptor pointer
++ kernel access */
++#endif
++
++
++#define RX_DESC_PTR_TBL_OFST 0xF40000 /* Receive descriptor pointer table */
++ #define RX_ISCSI_DDIG_EN_LBN 88
++ #define RX_ISCSI_DDIG_EN_WIDTH 1
++ #define RX_ISCSI_HDIG_EN_LBN 87
++ #define RX_ISCSI_HDIG_EN_WIDTH 1
++ #define RX_DESC_PREF_ACT_LBN 86
++ #define RX_DESC_PREF_ACT_WIDTH 1
++ #define RX_DC_HW_RPTR_LBN 80
++ #define RX_DC_HW_RPTR_WIDTH 6
++ #define RX_DESCQ_HW_RPTR_LBN 68
++ #define RX_DESCQ_HW_RPTR_WIDTH 12
++ #define RX_DESCQ_SW_WPTR_LBN 56
++ #define RX_DESCQ_SW_WPTR_WIDTH 12
++ #define RX_DESCQ_BUF_BASE_ID_LBN 36
++ #define RX_DESCQ_BUF_BASE_ID_WIDTH 20
++ #define RX_DESCQ_EVQ_ID_LBN 24
++ #define RX_DESCQ_EVQ_ID_WIDTH 12
++ #define RX_DESCQ_OWNER_ID_LBN 10
++ #define RX_DESCQ_OWNER_ID_WIDTH 14
++ #define RX_DESCQ_LABEL_LBN 5
++ #define RX_DESCQ_LABEL_WIDTH 5
++ #define RX_DESCQ_SIZE_LBN 3
++ #define RX_DESCQ_SIZE_WIDTH 2
++ #define RX_DESCQ_TYPE_LBN 2
++ #define RX_DESCQ_TYPE_WIDTH 1
++ #define RX_DESCQ_JUMBO_LBN 1
++ #define RX_DESCQ_JUMBO_WIDTH 1
++ #define RX_DESCQ_EN_LBN 0
++ #define RX_DESCQ_EN_WIDTH 1
++
++
++#define RX_RSS_INDIR_TBL_B0_OFST 0xFB0000 /* RSS indirection table (B0 only) */
++ #define RX_RSS_INDIR_ENT_B0_LBN 0
++ #define RX_RSS_INDIR_ENT_B0_WIDTH 6
++
++/*************---- TX Datapath Registers C Header ----*************/
++#define TX_FLUSH_DESCQ_REG_KER_OFST 0xA00 /* Transmit flush descriptor
++ queue register */
++#define TX_FLUSH_DESCQ_REG_OFST 0xA00 /* Transmit flush descriptor queue
++ register */
++ #define TX_FLUSH_DESCQ_CMD_LBN 12
++ #define TX_FLUSH_DESCQ_CMD_WIDTH 1
++ #define TX_FLUSH_DESCQ_LBN 0
++ #define TX_FLUSH_DESCQ_WIDTH 12
++#define TX_DESC_UPD_REG_KER_OFST 0xA10 /* Kernel transmit descriptor update
++ register. Page-mapped */
++#define TX_DESC_UPD_REG_PAGE4_OFST 0x8A10 /* Char & user transmit descriptor
++ update register. Page-mapped */
++#define TX_DESC_UPD_REG_PAGE123K_OFST 0x1000A10 /* Char & user transmit
++ descriptor update register.
++ Page-mapped */
++ #define TX_DESC_WPTR_LBN 96
++ #define TX_DESC_WPTR_WIDTH 12
++ #define TX_DESC_PUSH_CMD_LBN 95
++ #define TX_DESC_PUSH_CMD_WIDTH 1
++ #define TX_DESC_LBN 0
++ #define TX_DESC_WIDTH 95
++ #define TX_KER_DESC_LBN 0
++ #define TX_KER_DESC_WIDTH 64
++ #define TX_USR_DESC_LBN 0
++ #define TX_USR_DESC_WIDTH 64
++#define TX_DC_CFG_REG_KER_OFST 0xA20 /* Transmit descriptor cache
++ configuration register */
++#define TX_DC_CFG_REG_OFST 0xA20 /* Transmit descriptor cache configuration
++ register */
++ #define TX_DC_SIZE_LBN 0
++ #define TX_DC_SIZE_WIDTH 2
++
++#if FALCON_EXTENDED_P_BAR
++#define TX_DESC_PTR_TBL_KER_OFST 0x11900 /* Transmit descriptor pointer. */
++#else
++#define TX_DESC_PTR_TBL_KER_OFST 0x1900 /* Transmit descriptor pointer. */
++#endif
++
++
++#define TX_DESC_PTR_TBL_OFST 0xF50000 /* Transmit descriptor pointer */
++ #define TX_NON_IP_DROP_DIS_B0_LBN 91
++ #define TX_NON_IP_DROP_DIS_B0_WIDTH 1
++ #define TX_IP_CHKSM_DIS_B0_LBN 90
++ #define TX_IP_CHKSM_DIS_B0_WIDTH 1
++ #define TX_TCP_CHKSM_DIS_B0_LBN 89
++ #define TX_TCP_CHKSM_DIS_B0_WIDTH 1
++ #define TX_DESCQ_EN_LBN 88
++ #define TX_DESCQ_EN_WIDTH 1
++ #define TX_ISCSI_DDIG_EN_LBN 87
++ #define TX_ISCSI_DDIG_EN_WIDTH 1
++ #define TX_ISCSI_HDIG_EN_LBN 86
++ #define TX_ISCSI_HDIG_EN_WIDTH 1
++ #define TX_DC_HW_RPTR_LBN 80
++ #define TX_DC_HW_RPTR_WIDTH 6
++ #define TX_DESCQ_HW_RPTR_LBN 68
++ #define TX_DESCQ_HW_RPTR_WIDTH 12
++ #define TX_DESCQ_SW_WPTR_LBN 56
++ #define TX_DESCQ_SW_WPTR_WIDTH 12
++ #define TX_DESCQ_BUF_BASE_ID_LBN 36
++ #define TX_DESCQ_BUF_BASE_ID_WIDTH 20
++ #define TX_DESCQ_EVQ_ID_LBN 24
++ #define TX_DESCQ_EVQ_ID_WIDTH 12
++ #define TX_DESCQ_OWNER_ID_LBN 10
++ #define TX_DESCQ_OWNER_ID_WIDTH 14
++ #define TX_DESCQ_LABEL_LBN 5
++ #define TX_DESCQ_LABEL_WIDTH 5
++ #define TX_DESCQ_SIZE_LBN 3
++ #define TX_DESCQ_SIZE_WIDTH 2
++ #define TX_DESCQ_TYPE_LBN 1
++ #define TX_DESCQ_TYPE_WIDTH 2
++ #define TX_DESCQ_FLUSH_LBN 0
++ #define TX_DESCQ_FLUSH_WIDTH 1
++#define TX_CFG_REG_KER_OFST 0xA50 /* Transmit configuration register */
++#define TX_CFG_REG_OFST 0xA50 /* Transmit configuration register */
++ #define TX_IP_ID_P1_OFS_LBN 32
++ #define TX_IP_ID_P1_OFS_WIDTH 15
++ #define TX_IP_ID_P0_OFS_LBN 16
++ #define TX_IP_ID_P0_OFS_WIDTH 15
++ #define TX_TURBO_EN_LBN 3
++ #define TX_TURBO_EN_WIDTH 1
++ #define TX_OWNERR_CTL_LBN 2
++ #define TX_OWNERR_CTL_WIDTH 2
++ #define TX_NON_IP_DROP_DIS_LBN 1
++ #define TX_NON_IP_DROP_DIS_WIDTH 1
++ #define TX_IP_ID_REP_EN_LBN 0
++ #define TX_IP_ID_REP_EN_WIDTH 1
++#define TX_RESERVED_REG_KER_OFST 0xA80 /* Transmit configuration register */
++#define TX_RESERVED_REG_OFST 0xA80 /* Transmit configuration register */
++ #define TX_CSR_PUSH_EN_LBN 89
++ #define TX_CSR_PUSH_EN_WIDTH 1
++ #define TX_RX_SPACER_LBN 64
++ #define TX_RX_SPACER_WIDTH 8
++ #define TX_SW_EV_EN_LBN 59
++ #define TX_SW_EV_EN_WIDTH 1
++ #define TX_RX_SPACER_EN_LBN 57
++ #define TX_RX_SPACER_EN_WIDTH 1
++ #define TX_CSR_PREF_WD_TMR_LBN 24
++ #define TX_CSR_PREF_WD_TMR_WIDTH 16
++ #define TX_CSR_ONLY1TAG_LBN 21
++ #define TX_CSR_ONLY1TAG_WIDTH 1
++ #define TX_PREF_THRESHOLD_LBN 19
++ #define TX_PREF_THRESHOLD_WIDTH 2
++ #define TX_ONE_PKT_PER_Q_LBN 18
++ #define TX_ONE_PKT_PER_Q_WIDTH 1
++ #define TX_DIS_NON_IP_EV_LBN 17
++ #define TX_DIS_NON_IP_EV_WIDTH 1
++ #define TX_DMA_SPACER_LBN 8
++ #define TX_DMA_SPACER_WIDTH 8
++ #define TX_FLUSH_MIN_LEN_EN_B0_LBN 7
++ #define TX_FLUSH_MIN_LEN_EN_B0_WIDTH 1
++ #define TX_TCP_DIS_A1_LBN 7
++ #define TX_TCP_DIS_A1_WIDTH 1
++ #define TX_IP_DIS_A1_LBN 6
++ #define TX_IP_DIS_A1_WIDTH 1
++ #define TX_MAX_CPL_LBN 2
++ #define TX_MAX_CPL_WIDTH 2
++ #define TX_MAX_PREF_LBN 0
++ #define TX_MAX_PREF_WIDTH 2
++#define TX_VLAN_REG_OFST 0xAE0 /* Transmit VLAN tag register */
++ #define TX_VLAN_EN_LBN 127
++ #define TX_VLAN_EN_WIDTH 1
++ #define TX_VLAN7_PORT1_EN_LBN 125
++ #define TX_VLAN7_PORT1_EN_WIDTH 1
++ #define TX_VLAN7_PORT0_EN_LBN 124
++ #define TX_VLAN7_PORT0_EN_WIDTH 1
++ #define TX_VLAN7_LBN 112
++ #define TX_VLAN7_WIDTH 12
++ #define TX_VLAN6_PORT1_EN_LBN 109
++ #define TX_VLAN6_PORT1_EN_WIDTH 1
++ #define TX_VLAN6_PORT0_EN_LBN 108
++ #define TX_VLAN6_PORT0_EN_WIDTH 1
++ #define TX_VLAN6_LBN 96
++ #define TX_VLAN6_WIDTH 12
++ #define TX_VLAN5_PORT1_EN_LBN 93
++ #define TX_VLAN5_PORT1_EN_WIDTH 1
++ #define TX_VLAN5_PORT0_EN_LBN 92
++ #define TX_VLAN5_PORT0_EN_WIDTH 1
++ #define TX_VLAN5_LBN 80
++ #define TX_VLAN5_WIDTH 12
++ #define TX_VLAN4_PORT1_EN_LBN 77
++ #define TX_VLAN4_PORT1_EN_WIDTH 1
++ #define TX_VLAN4_PORT0_EN_LBN 76
++ #define TX_VLAN4_PORT0_EN_WIDTH 1
++ #define TX_VLAN4_LBN 64
++ #define TX_VLAN4_WIDTH 12
++ #define TX_VLAN3_PORT1_EN_LBN 61
++ #define TX_VLAN3_PORT1_EN_WIDTH 1
++ #define TX_VLAN3_PORT0_EN_LBN 60
++ #define TX_VLAN3_PORT0_EN_WIDTH 1
++ #define TX_VLAN3_LBN 48
++ #define TX_VLAN3_WIDTH 12
++ #define TX_VLAN2_PORT1_EN_LBN 45
++ #define TX_VLAN2_PORT1_EN_WIDTH 1
++ #define TX_VLAN2_PORT0_EN_LBN 44
++ #define TX_VLAN2_PORT0_EN_WIDTH 1
++ #define TX_VLAN2_LBN 32
++ #define TX_VLAN2_WIDTH 12
++ #define TX_VLAN1_PORT1_EN_LBN 29
++ #define TX_VLAN1_PORT1_EN_WIDTH 1
++ #define TX_VLAN1_PORT0_EN_LBN 28
++ #define TX_VLAN1_PORT0_EN_WIDTH 1
++ #define TX_VLAN1_LBN 16
++ #define TX_VLAN1_WIDTH 12
++ #define TX_VLAN0_PORT1_EN_LBN 13
++ #define TX_VLAN0_PORT1_EN_WIDTH 1
++ #define TX_VLAN0_PORT0_EN_LBN 12
++ #define TX_VLAN0_PORT0_EN_WIDTH 1
++ #define TX_VLAN0_LBN 0
++ #define TX_VLAN0_WIDTH 12
++#define TX_FIL_CTL_REG_OFST 0xAF0 /* Transmit filter control register */
++ #define TX_MADR1_FIL_EN_LBN 65
++ #define TX_MADR1_FIL_EN_WIDTH 1
++ #define TX_MADR0_FIL_EN_LBN 64
++ #define TX_MADR0_FIL_EN_WIDTH 1
++ #define TX_IPFIL31_PORT1_EN_LBN 63
++ #define TX_IPFIL31_PORT1_EN_WIDTH 1
++ #define TX_IPFIL31_PORT0_EN_LBN 62
++ #define TX_IPFIL31_PORT0_EN_WIDTH 1
++ #define TX_IPFIL30_PORT1_EN_LBN 61
++ #define TX_IPFIL30_PORT1_EN_WIDTH 1
++ #define TX_IPFIL30_PORT0_EN_LBN 60
++ #define TX_IPFIL30_PORT0_EN_WIDTH 1
++ #define TX_IPFIL29_PORT1_EN_LBN 59
++ #define TX_IPFIL29_PORT1_EN_WIDTH 1
++ #define TX_IPFIL29_PORT0_EN_LBN 58
++ #define TX_IPFIL29_PORT0_EN_WIDTH 1
++ #define TX_IPFIL28_PORT1_EN_LBN 57
++ #define TX_IPFIL28_PORT1_EN_WIDTH 1
++ #define TX_IPFIL28_PORT0_EN_LBN 56
++ #define TX_IPFIL28_PORT0_EN_WIDTH 1
++ #define TX_IPFIL27_PORT1_EN_LBN 55
++ #define TX_IPFIL27_PORT1_EN_WIDTH 1
++ #define TX_IPFIL27_PORT0_EN_LBN 54
++ #define TX_IPFIL27_PORT0_EN_WIDTH 1
++ #define TX_IPFIL26_PORT1_EN_LBN 53
++ #define TX_IPFIL26_PORT1_EN_WIDTH 1
++ #define TX_IPFIL26_PORT0_EN_LBN 52
++ #define TX_IPFIL26_PORT0_EN_WIDTH 1
++ #define TX_IPFIL25_PORT1_EN_LBN 51
++ #define TX_IPFIL25_PORT1_EN_WIDTH 1
++ #define TX_IPFIL25_PORT0_EN_LBN 50
++ #define TX_IPFIL25_PORT0_EN_WIDTH 1
++ #define TX_IPFIL24_PORT1_EN_LBN 49
++ #define TX_IPFIL24_PORT1_EN_WIDTH 1
++ #define TX_IPFIL24_PORT0_EN_LBN 48
++ #define TX_IPFIL24_PORT0_EN_WIDTH 1
++ #define TX_IPFIL23_PORT1_EN_LBN 47
++ #define TX_IPFIL23_PORT1_EN_WIDTH 1
++ #define TX_IPFIL23_PORT0_EN_LBN 46
++ #define TX_IPFIL23_PORT0_EN_WIDTH 1
++ #define TX_IPFIL22_PORT1_EN_LBN 45
++ #define TX_IPFIL22_PORT1_EN_WIDTH 1
++ #define TX_IPFIL22_PORT0_EN_LBN 44
++ #define TX_IPFIL22_PORT0_EN_WIDTH 1
++ #define TX_IPFIL21_PORT1_EN_LBN 43
++ #define TX_IPFIL21_PORT1_EN_WIDTH 1
++ #define TX_IPFIL21_PORT0_EN_LBN 42
++ #define TX_IPFIL21_PORT0_EN_WIDTH 1
++ #define TX_IPFIL20_PORT1_EN_LBN 41
++ #define TX_IPFIL20_PORT1_EN_WIDTH 1
++ #define TX_IPFIL20_PORT0_EN_LBN 40
++ #define TX_IPFIL20_PORT0_EN_WIDTH 1
++ #define TX_IPFIL19_PORT1_EN_LBN 39
++ #define TX_IPFIL19_PORT1_EN_WIDTH 1
++ #define TX_IPFIL19_PORT0_EN_LBN 38
++ #define TX_IPFIL19_PORT0_EN_WIDTH 1
++ #define TX_IPFIL18_PORT1_EN_LBN 37
++ #define TX_IPFIL18_PORT1_EN_WIDTH 1
++ #define TX_IPFIL18_PORT0_EN_LBN 36
++ #define TX_IPFIL18_PORT0_EN_WIDTH 1
++ #define TX_IPFIL17_PORT1_EN_LBN 35
++ #define TX_IPFIL17_PORT1_EN_WIDTH 1
++ #define TX_IPFIL17_PORT0_EN_LBN 34
++ #define TX_IPFIL17_PORT0_EN_WIDTH 1
++ #define TX_IPFIL16_PORT1_EN_LBN 33
++ #define TX_IPFIL16_PORT1_EN_WIDTH 1
++ #define TX_IPFIL16_PORT0_EN_LBN 32
++ #define TX_IPFIL16_PORT0_EN_WIDTH 1
++ #define TX_IPFIL15_PORT1_EN_LBN 31
++ #define TX_IPFIL15_PORT1_EN_WIDTH 1
++ #define TX_IPFIL15_PORT0_EN_LBN 30
++ #define TX_IPFIL15_PORT0_EN_WIDTH 1
++ #define TX_IPFIL14_PORT1_EN_LBN 29
++ #define TX_IPFIL14_PORT1_EN_WIDTH 1
++ #define TX_IPFIL14_PORT0_EN_LBN 28
++ #define TX_IPFIL14_PORT0_EN_WIDTH 1
++ #define TX_IPFIL13_PORT1_EN_LBN 27
++ #define TX_IPFIL13_PORT1_EN_WIDTH 1
++ #define TX_IPFIL13_PORT0_EN_LBN 26
++ #define TX_IPFIL13_PORT0_EN_WIDTH 1
++ #define TX_IPFIL12_PORT1_EN_LBN 25
++ #define TX_IPFIL12_PORT1_EN_WIDTH 1
++ #define TX_IPFIL12_PORT0_EN_LBN 24
++ #define TX_IPFIL12_PORT0_EN_WIDTH 1
++ #define TX_IPFIL11_PORT1_EN_LBN 23
++ #define TX_IPFIL11_PORT1_EN_WIDTH 1
++ #define TX_IPFIL11_PORT0_EN_LBN 22
++ #define TX_IPFIL11_PORT0_EN_WIDTH 1
++ #define TX_IPFIL10_PORT1_EN_LBN 21
++ #define TX_IPFIL10_PORT1_EN_WIDTH 1
++ #define TX_IPFIL10_PORT0_EN_LBN 20
++ #define TX_IPFIL10_PORT0_EN_WIDTH 1
++ #define TX_IPFIL9_PORT1_EN_LBN 19
++ #define TX_IPFIL9_PORT1_EN_WIDTH 1
++ #define TX_IPFIL9_PORT0_EN_LBN 18
++ #define TX_IPFIL9_PORT0_EN_WIDTH 1
++ #define TX_IPFIL8_PORT1_EN_LBN 17
++ #define TX_IPFIL8_PORT1_EN_WIDTH 1
++ #define TX_IPFIL8_PORT0_EN_LBN 16
++ #define TX_IPFIL8_PORT0_EN_WIDTH 1
++ #define TX_IPFIL7_PORT1_EN_LBN 15
++ #define TX_IPFIL7_PORT1_EN_WIDTH 1
++ #define TX_IPFIL7_PORT0_EN_LBN 14
++ #define TX_IPFIL7_PORT0_EN_WIDTH 1
++ #define TX_IPFIL6_PORT1_EN_LBN 13
++ #define TX_IPFIL6_PORT1_EN_WIDTH 1
++ #define TX_IPFIL6_PORT0_EN_LBN 12
++ #define TX_IPFIL6_PORT0_EN_WIDTH 1
++ #define TX_IPFIL5_PORT1_EN_LBN 11
++ #define TX_IPFIL5_PORT1_EN_WIDTH 1
++ #define TX_IPFIL5_PORT0_EN_LBN 10
++ #define TX_IPFIL5_PORT0_EN_WIDTH 1
++ #define TX_IPFIL4_PORT1_EN_LBN 9
++ #define TX_IPFIL4_PORT1_EN_WIDTH 1
++ #define TX_IPFIL4_PORT0_EN_LBN 8
++ #define TX_IPFIL4_PORT0_EN_WIDTH 1
++ #define TX_IPFIL3_PORT1_EN_LBN 7
++ #define TX_IPFIL3_PORT1_EN_WIDTH 1
++ #define TX_IPFIL3_PORT0_EN_LBN 6
++ #define TX_IPFIL3_PORT0_EN_WIDTH 1
++ #define TX_IPFIL2_PORT1_EN_LBN 5
++ #define TX_IPFIL2_PORT1_EN_WIDTH 1
++ #define TX_IPFIL2_PORT0_EN_LBN 4
++ #define TX_IPFIL2_PORT0_EN_WIDTH 1
++ #define TX_IPFIL1_PORT1_EN_LBN 3
++ #define TX_IPFIL1_PORT1_EN_WIDTH 1
++ #define TX_IPFIL1_PORT0_EN_LBN 2
++ #define TX_IPFIL1_PORT0_EN_WIDTH 1
++ #define TX_IPFIL0_PORT1_EN_LBN 1
++ #define TX_IPFIL0_PORT1_EN_WIDTH 1
++ #define TX_IPFIL0_PORT0_EN_LBN 0
++ #define TX_IPFIL0_PORT0_EN_WIDTH 1
++#define TX_IPFIL_TBL_OFST 0xB00 /* Transmit IP source address filter table */
++ #define TX_IPFIL_MASK_LBN 32
++ #define TX_IPFIL_MASK_WIDTH 32
++ #define TX_IP_SRC_ADR_LBN 0
++ #define TX_IP_SRC_ADR_WIDTH 32
++#define TX_PACE_REG_A1_OFST 0xF80000 /* Transmit pace control register */
++#define TX_PACE_REG_B0_OFST 0xA90 /* Transmit pace control register */
++ #define TX_PACE_SB_NOTAF_LBN 19
++ #define TX_PACE_SB_NOTAF_WIDTH 10
++ #define TX_PACE_SB_AF_LBN 9
++ #define TX_PACE_SB_AF_WIDTH 10
++ #define TX_PACE_FB_BASE_LBN 5
++ #define TX_PACE_FB_BASE_WIDTH 4
++ #define TX_PACE_BIN_TH_LBN 0
++ #define TX_PACE_BIN_TH_WIDTH 5
++#define TX_PACE_TBL_A1_OFST 0xF80040 /* Transmit pacing table */
++#define TX_PACE_TBL_FIRST_QUEUE_A1 4
++#define TX_PACE_TBL_B0_OFST 0xF80000 /* Transmit pacing table */
++#define TX_PACE_TBL_FIRST_QUEUE_B0 0
++ #define TX_PACE_LBN 0
++ #define TX_PACE_WIDTH 5
++
++/*************---- EE/Flash Registers C Header ----*************/
++#define EE_SPI_HCMD_REG_KER_OFST 0x100 /* SPI host command register */
++#define EE_SPI_HCMD_REG_OFST 0x100 /* SPI host command register */
++ #define EE_SPI_HCMD_CMD_EN_LBN 31
++ #define EE_SPI_HCMD_CMD_EN_WIDTH 1
++ #define EE_WR_TIMER_ACTIVE_LBN 28
++ #define EE_WR_TIMER_ACTIVE_WIDTH 1
++ #define EE_SPI_HCMD_SF_SEL_LBN 24
++ #define EE_SPI_HCMD_SF_SEL_WIDTH 1
++ #define EE_SPI_HCMD_DABCNT_LBN 16
++ #define EE_SPI_HCMD_DABCNT_WIDTH 5
++ #define EE_SPI_HCMD_READ_LBN 15
++ #define EE_SPI_HCMD_READ_WIDTH 1
++ #define EE_SPI_HCMD_DUBCNT_LBN 12
++ #define EE_SPI_HCMD_DUBCNT_WIDTH 2
++ #define EE_SPI_HCMD_ADBCNT_LBN 8
++ #define EE_SPI_HCMD_ADBCNT_WIDTH 2
++ #define EE_SPI_HCMD_ENC_LBN 0
++ #define EE_SPI_HCMD_ENC_WIDTH 8
++#define EE_SPI_HADR_REG_KER_OFST 0X110 /* SPI host address register */
++#define EE_SPI_HADR_REG_OFST 0X110 /* SPI host address register */
++ #define EE_SPI_HADR_DUBYTE_LBN 24
++ #define EE_SPI_HADR_DUBYTE_WIDTH 8
++ #define EE_SPI_HADR_ADR_LBN 0
++ #define EE_SPI_HADR_ADR_WIDTH 24
++#define EE_SPI_HDATA_REG_KER_OFST 0x120 /* SPI host data register */
++#define EE_SPI_HDATA_REG_OFST 0x120 /* SPI host data register */
++ #define EE_SPI_HDATA3_LBN 96
++ #define EE_SPI_HDATA3_WIDTH 32
++ #define EE_SPI_HDATA2_LBN 64
++ #define EE_SPI_HDATA2_WIDTH 32
++ #define EE_SPI_HDATA1_LBN 32
++ #define EE_SPI_HDATA1_WIDTH 32
++ #define EE_SPI_HDATA0_LBN 0
++ #define EE_SPI_HDATA0_WIDTH 32
++#define EE_BASE_PAGE_REG_KER_OFST 0x130 /* Expansion ROM base mirror register */
++#define EE_BASE_PAGE_REG_OFST 0x130 /* Expansion ROM base mirror register */
++ #define EE_EXP_ROM_WINDOW_BASE_LBN 16
++ #define EE_EXP_ROM_WINDOW_BASE_WIDTH 13
++ #define EE_EXPROM_MASK_LBN 0
++ #define EE_EXPROM_MASK_WIDTH 13
++#define EE_VPD_CFG0_REG_KER_OFST 0X140 /* SPI/VPD configuration register */
++#define EE_VPD_CFG0_REG_OFST 0X140 /* SPI/VPD configuration register */
++ #define EE_SF_FASTRD_EN_LBN 127
++ #define EE_SF_FASTRD_EN_WIDTH 1
++ #define EE_SF_CLOCK_DIV_LBN 120
++ #define EE_SF_CLOCK_DIV_WIDTH 7
++ #define EE_VPD_WIP_POLL_LBN 119
++ #define EE_VPD_WIP_POLL_WIDTH 1
++ #define EE_VPDW_LENGTH_LBN 80
++ #define EE_VPDW_LENGTH_WIDTH 15
++ #define EE_VPDW_BASE_LBN 64
++ #define EE_VPDW_BASE_WIDTH 15
++ #define EE_VPD_WR_CMD_EN_LBN 56
++ #define EE_VPD_WR_CMD_EN_WIDTH 8
++ #define EE_VPD_BASE_LBN 32
++ #define EE_VPD_BASE_WIDTH 24
++ #define EE_VPD_LENGTH_LBN 16
++ #define EE_VPD_LENGTH_WIDTH 13
++ #define EE_VPD_AD_SIZE_LBN 8
++ #define EE_VPD_AD_SIZE_WIDTH 5
++ #define EE_VPD_ACCESS_ON_LBN 5
++ #define EE_VPD_ACCESS_ON_WIDTH 1
++#define EE_VPD_SW_CNTL_REG_KER_OFST 0X150 /* VPD access SW control register */
++#define EE_VPD_SW_CNTL_REG_OFST 0X150 /* VPD access SW control register */
++ #define EE_VPD_CYCLE_PENDING_LBN 31
++ #define EE_VPD_CYCLE_PENDING_WIDTH 1
++ #define EE_VPD_CYC_WRITE_LBN 28
++ #define EE_VPD_CYC_WRITE_WIDTH 1
++ #define EE_VPD_CYC_ADR_LBN 0
++ #define EE_VPD_CYC_ADR_WIDTH 15
++#define EE_VPD_SW_DATA_REG_KER_OFST 0x160 /* VPD access SW data register */
++#define EE_VPD_SW_DATA_REG_OFST 0x160 /* VPD access SW data register */
++ #define EE_VPD_CYC_DAT_LBN 0
++ #define EE_VPD_CYC_DAT_WIDTH 32
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon/falcon_desc.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon/falcon_desc.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,75 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides EtherFabric NIC - EFXXXX (aka Falcon) descriptor
++ * definitions.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*************---- Descriptors C Headers ----*************/
++/* Receive Kernel IP Descriptor */
++ #define RX_KER_BUF_SIZE_LBN 48
++ #define RX_KER_BUF_SIZE_WIDTH 14
++ #define RX_KER_BUF_REGION_LBN 46
++ #define RX_KER_BUF_REGION_WIDTH 2
++ #define RX_KER_BUF_REGION0_DECODE 0
++ #define RX_KER_BUF_REGION1_DECODE 1
++ #define RX_KER_BUF_REGION2_DECODE 2
++ #define RX_KER_BUF_REGION3_DECODE 3
++ #define RX_KER_BUF_ADR_LBN 0
++ #define RX_KER_BUF_ADR_WIDTH 46
++/* Receive User IP Descriptor */
++ #define RX_USR_2BYTE_OFS_LBN 20
++ #define RX_USR_2BYTE_OFS_WIDTH 12
++ #define RX_USR_BUF_ID_LBN 0
++ #define RX_USR_BUF_ID_WIDTH 20
++/* Transmit Kernel IP Descriptor */
++ #define TX_KER_PORT_LBN 63
++ #define TX_KER_PORT_WIDTH 1
++ #define TX_KER_CONT_LBN 62
++ #define TX_KER_CONT_WIDTH 1
++ #define TX_KER_BYTE_CNT_LBN 48
++ #define TX_KER_BYTE_CNT_WIDTH 14
++ #define TX_KER_BUF_REGION_LBN 46
++ #define TX_KER_BUF_REGION_WIDTH 2
++ #define TX_KER_BUF_REGION0_DECODE 0
++ #define TX_KER_BUF_REGION1_DECODE 1
++ #define TX_KER_BUF_REGION2_DECODE 2
++ #define TX_KER_BUF_REGION3_DECODE 3
++ #define TX_KER_BUF_ADR_LBN 0
++ #define TX_KER_BUF_ADR_WIDTH 46
++/* Transmit User IP Descriptor */
++ #define TX_USR_PORT_LBN 47
++ #define TX_USR_PORT_WIDTH 1
++ #define TX_USR_CONT_LBN 46
++ #define TX_USR_CONT_WIDTH 1
++ #define TX_USR_BYTE_CNT_LBN 33
++ #define TX_USR_BYTE_CNT_WIDTH 13
++ #define TX_USR_BUF_ID_LBN 13
++ #define TX_USR_BUF_ID_WIDTH 20
++ #define TX_USR_BYTE_OFS_LBN 0
++ #define TX_USR_BYTE_OFS_WIDTH 13
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon/falcon_event.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon/falcon_event.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,155 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides EtherFabric NIC - EFXXXX (aka Falcon) event
++ * definitions.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*************---- Events Format C Header ----*************/
++/*************---- Event entry ----*************/
++ #define EV_CODE_LBN 60
++ #define EV_CODE_WIDTH 4
++ #define RX_IP_EV_DECODE 0
++ #define TX_IP_EV_DECODE 2
++ #define DRIVER_EV_DECODE 5
++ #define GLOBAL_EV_DECODE 6
++ #define DRV_GEN_EV_DECODE 7
++ #define EV_DATA_LBN 0
++ #define EV_DATA_WIDTH 60
++/******---- Receive IP events for both Kernel & User event queues ----******/
++ #define RX_EV_PKT_OK_LBN 56
++ #define RX_EV_PKT_OK_WIDTH 1
++ #define RX_EV_BUF_OWNER_ID_ERR_LBN 54
++ #define RX_EV_BUF_OWNER_ID_ERR_WIDTH 1
++ #define RX_EV_IP_HDR_CHKSUM_ERR_LBN 52
++ #define RX_EV_IP_HDR_CHKSUM_ERR_WIDTH 1
++ #define RX_EV_TCP_UDP_CHKSUM_ERR_LBN 51
++ #define RX_EV_TCP_UDP_CHKSUM_ERR_WIDTH 1
++ #define RX_EV_ETH_CRC_ERR_LBN 50
++ #define RX_EV_ETH_CRC_ERR_WIDTH 1
++ #define RX_EV_FRM_TRUNC_LBN 49
++ #define RX_EV_FRM_TRUNC_WIDTH 1
++ #define RX_EV_DRIB_NIB_LBN 48
++ #define RX_EV_DRIB_NIB_WIDTH 1
++ #define RX_EV_TOBE_DISC_LBN 47
++ #define RX_EV_TOBE_DISC_WIDTH 1
++ #define RX_EV_PKT_TYPE_LBN 44
++ #define RX_EV_PKT_TYPE_WIDTH 3
++ #define RX_EV_PKT_TYPE_ETH_DECODE 0
++ #define RX_EV_PKT_TYPE_LLC_DECODE 1
++ #define RX_EV_PKT_TYPE_JUMBO_DECODE 2
++ #define RX_EV_PKT_TYPE_VLAN_DECODE 3
++ #define RX_EV_PKT_TYPE_VLAN_LLC_DECODE 4
++ #define RX_EV_PKT_TYPE_VLAN_JUMBO_DECODE 5
++ #define RX_EV_HDR_TYPE_LBN 42
++ #define RX_EV_HDR_TYPE_WIDTH 2
++ #define RX_EV_HDR_TYPE_TCP_IPV4_DECODE 0
++ #define RX_EV_HDR_TYPE_UDP_IPV4_DECODE 1
++ #define RX_EV_HDR_TYPE_OTHER_IP_DECODE 2
++ #define RX_EV_HDR_TYPE_NON_IP_DECODE 3
++ #define RX_EV_DESC_Q_EMPTY_LBN 41
++ #define RX_EV_DESC_Q_EMPTY_WIDTH 1
++ #define RX_EV_MCAST_HASH_MATCH_LBN 40
++ #define RX_EV_MCAST_HASH_MATCH_WIDTH 1
++ #define RX_EV_MCAST_PKT_LBN 39
++ #define RX_EV_MCAST_PKT_WIDTH 1
++ #define RX_EV_Q_LABEL_LBN 32
++ #define RX_EV_Q_LABEL_WIDTH 5
++ #define RX_JUMBO_CONT_LBN 31
++ #define RX_JUMBO_CONT_WIDTH 1
++ #define RX_SOP_LBN 15
++ #define RX_SOP_WIDTH 1
++ #define RX_PORT_LBN 30
++ #define RX_PORT_WIDTH 1
++ #define RX_EV_BYTE_CNT_LBN 16
++ #define RX_EV_BYTE_CNT_WIDTH 14
++ #define RX_iSCSI_PKT_OK_LBN 14
++ #define RX_iSCSI_PKT_OK_WIDTH 1
++ #define RX_ISCSI_DDIG_ERR_LBN 13
++ #define RX_ISCSI_DDIG_ERR_WIDTH 1
++ #define RX_ISCSI_HDIG_ERR_LBN 12
++ #define RX_ISCSI_HDIG_ERR_WIDTH 1
++ #define RX_EV_DESC_PTR_LBN 0
++ #define RX_EV_DESC_PTR_WIDTH 12
++/******---- Transmit IP events for both Kernel & User event queues ----******/
++ #define TX_EV_PKT_ERR_LBN 38
++ #define TX_EV_PKT_ERR_WIDTH 1
++ #define TX_EV_PKT_TOO_BIG_LBN 37
++ #define TX_EV_PKT_TOO_BIG_WIDTH 1
++ #define TX_EV_Q_LABEL_LBN 32
++ #define TX_EV_Q_LABEL_WIDTH 5
++ #define TX_EV_PORT_LBN 16
++ #define TX_EV_PORT_WIDTH 1
++ #define TX_EV_WQ_FF_FULL_LBN 15
++ #define TX_EV_WQ_FF_FULL_WIDTH 1
++ #define TX_EV_BUF_OWNER_ID_ERR_LBN 14
++ #define TX_EV_BUF_OWNER_ID_ERR_WIDTH 1
++ #define TX_EV_COMP_LBN 12
++ #define TX_EV_COMP_WIDTH 1
++ #define TX_EV_DESC_PTR_LBN 0
++ #define TX_EV_DESC_PTR_WIDTH 12
++/*************---- Char or Kernel driver events ----*************/
++ #define DRIVER_EV_SUB_CODE_LBN 56
++ #define DRIVER_EV_SUB_CODE_WIDTH 4
++ #define TX_DESCQ_FLS_DONE_EV_DECODE 0x0
++ #define RX_DESCQ_FLS_DONE_EV_DECODE 0x1
++ #define EVQ_INIT_DONE_EV_DECODE 0x2
++ #define EVQ_NOT_EN_EV_DECODE 0x3
++ #define RX_DESCQ_FLSFF_OVFL_EV_DECODE 0x4
++ #define SRM_UPD_DONE_EV_DECODE 0x5
++ #define WAKE_UP_EV_DECODE 0x6
++ #define TX_PKT_NON_TCP_UDP_DECODE 0x9
++ #define TIMER_EV_DECODE 0xA
++ #define RX_DSC_ERROR_EV_DECODE 0xE
++ #define DRIVER_EV_TX_DESCQ_ID_LBN 0
++ #define DRIVER_EV_TX_DESCQ_ID_WIDTH 12
++ #define DRIVER_EV_RX_DESCQ_ID_LBN 0
++ #define DRIVER_EV_RX_DESCQ_ID_WIDTH 12
++ #define DRIVER_EV_EVQ_ID_LBN 0
++ #define DRIVER_EV_EVQ_ID_WIDTH 12
++ #define DRIVER_TMR_ID_LBN 0
++ #define DRIVER_TMR_ID_WIDTH 12
++ #define DRIVER_EV_SRM_UPD_LBN 0
++ #define DRIVER_EV_SRM_UPD_WIDTH 2
++ #define SRM_CLR_EV_DECODE 0
++ #define SRM_UPD_EV_DECODE 1
++ #define SRM_ILLCLR_EV_DECODE 2
++/********---- Global events. Sent to both event queue 0 and 4. ----********/
++ #define XFP_PHY_INTR_LBN 10
++ #define XFP_PHY_INTR_WIDTH 1
++ #define XG_PHY_INTR_LBN 9
++ #define XG_PHY_INTR_WIDTH 1
++ #define G_PHY1_INTR_LBN 8
++ #define G_PHY1_INTR_WIDTH 1
++ #define G_PHY0_INTR_LBN 7
++ #define G_PHY0_INTR_WIDTH 1
++/*************---- Driver generated events ----*************/
++ #define DRV_GEN_EV_CODE_LBN 60
++ #define DRV_GEN_EV_CODE_WIDTH 4
++ #define DRV_GEN_EV_DATA_LBN 0
++ #define DRV_GEN_EV_DATA_WIDTH 60
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon/falcon_intr_vec.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/falcon/falcon_intr_vec.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,44 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides EtherFabric NIC - EFXXXX (aka Falcon) interrupt
++ * vector definitions.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*************---- Interrupt Vector Format C Header ----*************/
++#define DW0_OFST 0x0 /* Double-word 0: Event queue FIFO interrupts */
++ #define EVQ_FIFO_HF_LBN 1
++ #define EVQ_FIFO_HF_WIDTH 1
++ #define EVQ_FIFO_AF_LBN 0
++ #define EVQ_FIFO_AF_WIDTH 1
++#define DW1_OFST 0x4 /* Double-word 1: Interrupt indicator */
++ #define INT_FLAG_LBN 0
++ #define INT_FLAG_WIDTH 1
++#define DW2_OFST 0x8 /* Double-word 2: Fatal interrupts */
++ #define FATAL_INT_LBN 0
++ #define FATAL_INT_WIDTH 1
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/workarounds.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/efab/hardware/workarounds.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,67 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides workaround settings for EtherFabric NICs.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_EFAB_WORKAROUNDS_H__
++#define __CI_DRIVER_EFAB_WORKAROUNDS_H__
++
++/*----------------------------------------------------------------------------
++ *
++ * Hardware workarounds which have global scope
++ *
++ *---------------------------------------------------------------------------*/
++
++#if defined(__CI_HARDWARE_CONFIG_FALCON_B0__)
++/*------------------------------- B0 ---------------------------------------*/
++
++#define BUG2175_WORKAROUND 0 /* TX event batching for dual port operation.
++ This removes the effect (dup TX events)
++ of the fix
++ (TX event per packet + batch events) */
++#define BUG5302_WORKAROUND 0 /* unstick TX DMAQ after out-of-range wr ptr */
++#define BUG5762_WORKAROUND 0 /* Set all queues to jumbo mode */
++#define BUG5391_WORKAROUND 0 /* Misaligned TX can't span 512-byte boundary */
++#define BUG7916_WORKAROUND 0 /* RX flush gets lost */
++
++#else
++/*------------------------------- A0/A1 ------------------------------------*/
++
++#define BUG2175_WORKAROUND 1 /* TX event batching for dual port operation.
++ This removes the effect (dup TX events)
++ of the fix
++ (TX event per packet + batch events) */
++#define BUG5302_WORKAROUND 1 /* unstick TX DMAQ after out-of-range wr ptr */
++#define BUG5762_WORKAROUND 1 /* Set all queues to jumbo mode */
++#define BUG5391_WORKAROUND 1 /* Misaligned TX can't span 512-byte boundary */
++#define BUG7916_WORKAROUND 1 /* RX flush gets lost */
++
++#endif /* B0/A01 */
++
++#endif /* __CI_DRIVER_EFAB_WORKAROUNDS_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/resource/efx_vi.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/resource/efx_vi.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,273 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains public EFX VI API to Solarflare resource manager.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_RESOURCE_EFX_VI_H__
++#define __CI_DRIVER_RESOURCE_EFX_VI_H__
++
++/* Default size of event queue in the efx_vi resource. Copied from
++ * CI_CFG_NETIF_EVENTQ_SIZE */
++#define EFX_VI_EVENTQ_SIZE_DEFAULT 1024
++
++extern int efx_vi_eventq_size;
++
++/**************************************************************************
++ * efx_vi_state types, allocation and free
++ **************************************************************************/
++
++/*! Handle for refering to a efx_vi */
++struct efx_vi_state;
++
++/*!
++ * Allocate an efx_vi, including event queue and pt_endpoint
++ *
++ * \param vih_out Pointer to a handle that is set on success
++ * \param ifindex Index of the network interface desired
++ * \return Zero on success (and vih_out set), non-zero on failure.
++ */
++extern int
++efx_vi_alloc(struct efx_vi_state **vih_out, int ifindex);
++
++/*!
++ * Free a previously allocated efx_vi
++ *
++ * \param vih The handle of the efx_vi to free
++ */
++extern void
++efx_vi_free(struct efx_vi_state *vih);
++
++/*!
++ * Reset a previously allocated efx_vi
++ *
++ * \param vih The handle of the efx_vi to reset
++ */
++extern void
++efx_vi_reset(struct efx_vi_state *vih);
++
++/**************************************************************************
++ * efx_vi_eventq types and functions
++ **************************************************************************/
++
++/*!
++ * Register a function to receive callbacks when event queue timeouts
++ * or wakeups occur. Only one function per efx_vi can be registered
++ * at once.
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param callback The function to callback
++ * \param context An argument to pass to the callback function
++ * \return Zero on success, non-zero on failure.
++ */
++extern int
++efx_vi_eventq_register_callback(struct efx_vi_state *vih,
++ void (*callback)(void *context, int is_timeout),
++ void *context);
++
++/*!
++ * Remove the current eventq timeout or wakeup callback function
++ *
++ * \param vih The handle to identify the efx_vi
++ * \return Zero on success, non-zero on failure
++ */
++extern int
++efx_vi_eventq_kill_callback(struct efx_vi_state *vih);
++
++/**************************************************************************
++ * efx_vi_dma_map types and functions
++ **************************************************************************/
++
++/*!
++ * Handle for refering to a efx_vi
++ */
++struct efx_vi_dma_map_state;
++
++/*!
++ * Map a list of buffer pages so they are registered with the hardware
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param addrs An array of page pointers to map
++ * \param n_addrs Length of the page pointer array. Must be a power of two.
++ * \param dmh_out Set on success to a handle used to refer to this mapping
++ * \return Zero on success, non-zero on failure.
++ */
++extern int
++efx_vi_dma_map_pages(struct efx_vi_state *vih, struct page **pages,
++ int n_pages, struct efx_vi_dma_map_state **dmh_out);
++extern int
++efx_vi_dma_map_addrs(struct efx_vi_state *vih,
++ unsigned long long *dev_bus_addrs, int n_pages,
++ struct efx_vi_dma_map_state **dmh_out);
++
++/*!
++ * Unmap a previously mapped set of pages so they are no longer registered
++ * with the hardware.
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param dmh The handle to identify the dma mapping
++ */
++extern void
++efx_vi_dma_unmap_pages(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh);
++extern void
++efx_vi_dma_unmap_addrs(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh);
++
++/*!
++ * Retrieve the buffer address of the mapping
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param dmh The handle to identify the buffer mapping
++ * \return The buffer address on success, or zero on failure
++ */
++extern unsigned
++efx_vi_dma_get_map_addr(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh);
++
++/**************************************************************************
++ * efx_vi filter functions
++ **************************************************************************/
++
++#define EFX_VI_STATIC_FILTERS 32
++
++/*! Handle to refer to a filter instance */
++struct filter_resource_t;
++
++/*!
++ * Allocate and add a filter
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param protocol The protocol of the new filter: UDP or TCP
++ * \param ip_addr_be32 The local ip address of the filter
++ * \param port_le16 The local port of the filter
++ * \param fh_out Set on success to be a handle to refer to this filter
++ * \return Zero on success, non-zero on failure.
++ */
++extern int
++efx_vi_filter(struct efx_vi_state *vih, int protocol, unsigned ip_addr_be32,
++ int port_le16, struct filter_resource_t **fh_out);
++
++/*!
++ * Remove a filter and free resources associated with it
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param fh The handle to identify the filter
++ * \return Zero on success, non-zero on failure
++ */
++extern int
++efx_vi_filter_stop(struct efx_vi_state *vih, struct filter_resource_t *fh);
++
++/**************************************************************************
++ * efx_vi hw resources types and functions
++ **************************************************************************/
++
++/*! Constants for the type field in efx_vi_hw_resource */
++#define EFX_VI_HW_RESOURCE_TXDMAQ 0x0 /* PFN of TX DMA Q */
++#define EFX_VI_HW_RESOURCE_RXDMAQ 0x1 /* PFN of RX DMA Q */
++#define EFX_VI_HW_RESOURCE_EVQTIMER 0x4 /* Address of event q timer */
++
++/* Address of event q pointer (EF1) */
++#define EFX_VI_HW_RESOURCE_EVQPTR 0x5
++/* Address of register pointer (Falcon A) */
++#define EFX_VI_HW_RESOURCE_EVQRPTR 0x6
++/* Offset of register pointer (Falcon B) */
++#define EFX_VI_HW_RESOURCE_EVQRPTR_OFFSET 0x7
++/* Address of mem KVA */
++#define EFX_VI_HW_RESOURCE_EVQMEMKVA 0x8
++/* PFN of doorbell page (Falcon) */
++#define EFX_VI_HW_RESOURCE_BELLPAGE 0x9
++
++/*! How large an array to allocate for the get_() functions - smaller
++ than the total number of constants as some are mutually exclusive */
++#define EFX_VI_HW_RESOURCE_MAXSIZE 0x7
++
++/*! Constants for the mem_type field in efx_vi_hw_resource */
++#define EFX_VI_HW_RESOURCE_IOBUFFER 0 /* Host memory */
++#define EFX_VI_HW_RESOURCE_PERIPHERAL 1 /* Card memory/registers */
++
++/*!
++ * Data structure providing information on a hardware resource mapping
++ */
++struct efx_vi_hw_resource {
++ u8 type; /*!< What this resource represents */
++ u8 mem_type; /*!< What type of memory is it in, eg,
++ * host or iomem */
++ u8 more_to_follow; /*!< Is this part of a multi-region resource */
++ u32 length; /*!< Length of the resource in bytes */
++ unsigned long address; /*!< Address of this resource */
++};
++
++/*!
++ * Metadata concerning the list of hardware resource mappings
++ */
++struct efx_vi_hw_resource_metadata {
++ int evq_order;
++ int evq_offs;
++ int evq_capacity;
++ int instance;
++ unsigned rx_capacity;
++ unsigned tx_capacity;
++ int nic_arch;
++ int nic_revision;
++ char nic_variant;
++};
++
++/*!
++ * Obtain a list of hardware resource mappings, using virtual addresses
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param mdata Pointer to a structure to receive the metadata
++ * \param hw_res_array An array to receive the list of hardware resources
++ * \param length The length of hw_res_array. Updated on success to contain
++ * the number of entries in the supplied array that were used.
++ * \return Zero on success, non-zero on failure
++ */
++extern int
++efx_vi_hw_resource_get_virt(struct efx_vi_state *vih,
++ struct efx_vi_hw_resource_metadata *mdata,
++ struct efx_vi_hw_resource *hw_res_array,
++ int *length);
++
++/*!
++ * Obtain a list of hardware resource mappings, using physical addresses
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param mdata Pointer to a structure to receive the metadata
++ * \param hw_res_array An array to receive the list of hardware resources
++ * \param length The length of hw_res_array. Updated on success to contain
++ * the number of entries in the supplied array that were used.
++ * \return Zero on success, non-zero on failure
++ */
++extern int
++efx_vi_hw_resource_get_phys(struct efx_vi_state *vih,
++ struct efx_vi_hw_resource_metadata *mdata,
++ struct efx_vi_hw_resource *hw_res_array,
++ int *length);
++
++#endif /* __CI_DRIVER_RESOURCE_EFX_VI_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/resource/linux_efhw_nic.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/driver/resource/linux_efhw_nic.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,69 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains definition of the public type struct linux_efhw_nic.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_RESOURCE_LINUX_RESOURCE__
++#define __CI_DRIVER_RESOURCE_LINUX_RESOURCE__
++
++#include <ci/efrm/efrm_nic.h>
++#include <linux/interrupt.h>
++
++
++/************************************************************************
++ * Per-nic structure in the resource driver *
++ ************************************************************************/
++
++struct linux_efhw_nic {
++ struct efrm_nic efrm_nic;
++
++ struct pci_dev *pci_dev; /*!< pci descriptor */
++ struct tasklet_struct tasklet; /*!< for interrupt bottom half */
++
++ /* Physical addresses of the control aperture bar. */
++ unsigned long ctr_ap_pci_addr;
++
++ /*! Callbacks for driverlink, when needed. */
++ struct efx_dl_callbacks *dl_callbacks;
++
++ /*! Event handlers. */
++ struct efhw_ev_handler *ev_handlers;
++
++};
++
++#define linux_efhw_nic(_efhw_nic) \
++ container_of(_efhw_nic, struct linux_efhw_nic, efrm_nic.efhw_nic)
++
++#endif /* __CI_DRIVER_RESOURCE_LINUX_RESOURCE__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/checks.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/checks.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,118 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides helpers to turn bit shifts into dword shifts and
++ * check that the bit fields haven't overflown the dword etc.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_CHECK_H__
++#define __CI_EFHW_CHECK_H__
++
++/*----------------------------------------------------------------------------
++ *
++ * Helpers to turn bit shifts into dword shifts and check that the bit fields
++ * haven't overflown the dword etc. Aim is to preserve consistency with the
++ * autogenerated headers - once stable we could hard code.
++ *
++ *---------------------------------------------------------------------------*/
++
++/* mask constructors */
++#define __FALCON_MASK(WIDTH, T) ((((T)1) << (WIDTH)) - 1)
++#define __FALCON_MASK32(WIDTH) __FALCON_MASK((WIDTH), uint32_t)
++#define __FALCON_MASK64(WIDTH) __FALCON_MASK((WIDTH), uint64_t)
++
++#define __FALCON_MASKFIELD32(LBN, WIDTH) \
++ ((uint32_t)(__FALCON_MASK32(WIDTH) << (LBN)))
++
++/* constructors for fields which span the first and second dwords */
++#define __LW(LBN) (32 - LBN)
++#define __LOW(v, LBN, WIDTH) \
++ ((uint32_t)(((v) & __FALCON_MASK64(__LW((LBN)))) << (LBN)))
++#define __HIGH(v, LBN, WIDTH) \
++ ((uint32_t)(((v) >> __LW((LBN))) & \
++ __FALCON_MASK64((WIDTH - __LW((LBN))))))
++/* constructors for fields within the second dword */
++#define __DW2(LBN) ((LBN) - 32)
++
++/* constructors for fields which span the second and third dwords */
++#define __LW2(LBN) (64 - LBN)
++#define __LOW2(v, LBN, WIDTH) \
++ ((uint32_t)(((v) & __FALCON_MASK64(__LW2((LBN)))) << ((LBN) - 32)))
++#define __HIGH2(v, LBN, WIDTH) \
++ ((uint32_t)(((v) >> __LW2((LBN))) & \
++ __FALCON_MASK64((WIDTH - __LW2((LBN))))))
++
++/* constructors for fields within the third dword */
++#define __DW3(LBN) ((LBN) - 64)
++
++/* constructors for fields which span the third and fourth dwords */
++#define __LW3(LBN) (96 - LBN)
++#define __LOW3(v, LBN, WIDTH) \
++ ((uint32_t)(((v) & __FALCON_MASK64(__LW3((LBN)))) << ((LBN) - 64)))
++#define __HIGH3(v, LBN, WIDTH) \
++ ((ci_unit32)(((v) >> __LW3((LBN))) & \
++ __FALCON_MASK64((WIDTH - __LW3((LBN))))))
++
++/* constructors for fields within the fourth dword */
++#define __DW4(LBN) ((LBN) - 96)
++
++/* checks that the autogenerated headers are consistent with our model */
++#define __WIDTHCHCK(a, b) EFHW_ASSERT((a) == (b))
++#define __RANGECHCK(v, WIDTH) \
++ EFHW_ASSERT(((uint64_t)(v) & ~(__FALCON_MASK64((WIDTH)))) == 0)
++
++/* fields within the first dword */
++#define __DWCHCK(LBN, WIDTH) \
++ EFHW_ASSERT(((LBN) >= 0) && (((LBN)+(WIDTH)) <= 32))
++
++/* fields which span the first and second dwords */
++#define __LWCHK(LBN, WIDTH) EFHW_ASSERT(WIDTH >= __LW(LBN))
++
++/* fields within the second dword */
++#define __DW2CHCK(LBN, WIDTH) \
++ EFHW_ASSERT(((LBN) >= 32) && (((LBN)+(WIDTH)) <= 64))
++
++/* fields which span the second and third dwords */
++#define __LW2CHK(LBN, WIDTH) EFHW_ASSERT(WIDTH >= __LW2(LBN))
++
++/* fields within the third dword */
++#define __DW3CHCK(LBN, WIDTH) \
++ EFHW_ASSERT(((LBN) >= 64) && (((LBN)+(WIDTH)) <= 96))
++
++/* fields which span the third and fourth dwords */
++#define __LW3CHK(LBN, WIDTH) EFHW_ASSERT(WIDTH >= __LW3(LBN))
++
++/* fields within the fourth dword */
++#define __DW4CHCK(LBN, WIDTH) \
++ EFHW_ASSERT(((LBN) >= 96) && (((LBN)+(WIDTH)) <= 128))
++
++/* fields in the first qword */
++#define __QWCHCK(LBN, WIDTH) \
++ EFHW_ASSERT(((LBN) >= 0) && (((LBN)+(WIDTH)) <= 64))
++
++#endif /* __CI_EFHW_CHECK_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/common.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,93 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides API of the efhw library which may be used both from
++ * the kernel and from the user-space code.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_COMMON_H__
++#define __CI_EFHW_COMMON_H__
++
++#include <ci/efhw/common_sysdep.h>
++
++typedef uint32_t efhw_buffer_addr_t;
++#define EFHW_BUFFER_ADDR_FMT "[ba:%"PRIx32"]"
++
++/*! Comment? */
++typedef union {
++ uint64_t u64;
++ struct {
++ uint32_t a;
++ uint32_t b;
++ } opaque;
++} efhw_event_t;
++
++/* Flags for TX/RX queues */
++#define EFHW_VI_JUMBO_EN 0x01 /*! scatter RX over multiple desc */
++#define EFHW_VI_ISCSI_RX_HDIG_EN 0x02 /*! iscsi rx header digest */
++#define EFHW_VI_ISCSI_TX_HDIG_EN 0x04 /*! iscsi tx header digest */
++#define EFHW_VI_ISCSI_RX_DDIG_EN 0x08 /*! iscsi rx data digest */
++#define EFHW_VI_ISCSI_TX_DDIG_EN 0x10 /*! iscsi tx data digest */
++#define EFHW_VI_TX_PHYS_ADDR_EN 0x20 /*! TX physical address mode */
++#define EFHW_VI_RX_PHYS_ADDR_EN 0x40 /*! RX physical address mode */
++#define EFHW_VI_RM_WITH_INTERRUPT 0x80 /*! VI with an interrupt */
++#define EFHW_VI_TX_IP_CSUM_DIS 0x100 /*! enable ip checksum generation */
++#define EFHW_VI_TX_TCPUDP_CSUM_DIS 0x200 /*! enable tcp/udp checksum
++ generation */
++#define EFHW_VI_TX_TCPUDP_ONLY 0x400 /*! drop non-tcp/udp packets */
++
++/* Types of hardware filter */
++/* Each of these values implicitly selects scatter filters on B0 - or in
++ EFHW_IP_FILTER_TYPE_NOSCAT_B0_MASK if a non-scatter filter is required */
++#define EFHW_IP_FILTER_TYPE_UDP_WILDCARD (0) /* dest host only */
++#define EFHW_IP_FILTER_TYPE_UDP_FULL (1) /* dest host and port */
++#define EFHW_IP_FILTER_TYPE_TCP_WILDCARD (2) /* dest based filter */
++#define EFHW_IP_FILTER_TYPE_TCP_FULL (3) /* src filter */
++/* Same again, but with RSS (for B0 only) */
++#define EFHW_IP_FILTER_TYPE_UDP_WILDCARD_RSS_B0 (4)
++#define EFHW_IP_FILTER_TYPE_UDP_FULL_RSS_B0 (5)
++#define EFHW_IP_FILTER_TYPE_TCP_WILDCARD_RSS_B0 (6)
++#define EFHW_IP_FILTER_TYPE_TCP_FULL_RSS_B0 (7)
++
++#define EFHW_IP_FILTER_TYPE_FULL_MASK (0x1) /* Mask for full / wildcard */
++#define EFHW_IP_FILTER_TYPE_TCP_MASK (0x2) /* Mask for TCP type */
++#define EFHW_IP_FILTER_TYPE_RSS_B0_MASK (0x4) /* Mask for B0 RSS enable */
++#define EFHW_IP_FILTER_TYPE_NOSCAT_B0_MASK (0x8) /* Mask for B0 SCATTER dsbl */
++
++#define EFHW_IP_FILTER_TYPE_MASK (0xffff) /* Mask of types above */
++
++#define EFHW_IP_FILTER_BROADCAST (0x10000) /* driverlink filter
++ support */
++
++#endif /* __CI_EFHW_COMMON_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/common_sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/common_sysdep.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,61 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides version-independent Linux kernel API for
++ * userland-to-kernel interfaces.
++ * Only kernels >=2.6.9 are supported.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_COMMON_LINUX_H__
++#define __CI_EFHW_COMMON_LINUX_H__
++
++#include <linux/types.h>
++
++/* Dirty hack, but Linux kernel does not provide DMA_ADDR_T_FMT */
++#if BITS_PER_LONG == 64 || defined(CONFIG_HIGHMEM64G)
++#define DMA_ADDR_T_FMT "%llx"
++#else
++#define DMA_ADDR_T_FMT "%x"
++#endif
++
++/* Linux kernel also does not provide PRIx32... Sigh. */
++#define PRIx32 "x"
++
++#ifdef __ia64__
++# define PRIx64 "lx"
++#else
++# define PRIx64 "llx"
++#endif
++
++#endif /* __CI_EFHW_COMMON_LINUX_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/debug.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/debug.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,84 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides debug-related API for efhw library using Linux kernel
++ * primitives.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_DEBUG_LINUX_H__
++#define __CI_EFHW_DEBUG_LINUX_H__
++
++#define EFHW_PRINTK_PREFIX "[sfc efhw] "
++
++#define EFHW_PRINTK(level, fmt, ...) \
++ printk(level EFHW_PRINTK_PREFIX fmt "\n", __VA_ARGS__)
++
++/* Following macros should be used with non-zero format parameters
++ * due to __VA_ARGS__ limitations. Use "%s" with __func__ if you can't
++ * find better parameters. */
++#define EFHW_ERR(fmt, ...) EFHW_PRINTK(KERN_ERR, fmt, __VA_ARGS__)
++#define EFHW_WARN(fmt, ...) EFHW_PRINTK(KERN_WARNING, fmt, __VA_ARGS__)
++#define EFHW_NOTICE(fmt, ...) EFHW_PRINTK(KERN_NOTICE, fmt, __VA_ARGS__)
++#if 0 && !defined(NDEBUG)
++#define EFHW_TRACE(fmt, ...) EFHW_PRINTK(KERN_DEBUG, fmt, __VA_ARGS__)
++#else
++#define EFHW_TRACE(fmt, ...)
++#endif
++
++#ifndef NDEBUG
++#define EFHW_ASSERT(cond) BUG_ON((cond) == 0)
++#define EFHW_DO_DEBUG(expr) expr
++#else
++#define EFHW_ASSERT(cond)
++#define EFHW_DO_DEBUG(expr)
++#endif
++
++#define EFHW_TEST(expr) \
++ do { \
++ if (unlikely(!(expr))) \
++ BUG(); \
++ } while (0)
++
++/* Build time asserts. We paste the line number into the type name
++ * so that the macro can be used more than once per file even if the
++ * compiler objects to multiple identical typedefs. Collisions
++ * between use in different header files is still possible. */
++#ifndef EFHW_BUILD_ASSERT
++#define __EFHW_BUILD_ASSERT_NAME(_x) __EFHW_BUILD_ASSERT_ILOATHECPP(_x)
++#define __EFHW_BUILD_ASSERT_ILOATHECPP(_x) __EFHW_BUILD_ASSERT__ ##_x
++#define EFHW_BUILD_ASSERT(e) \
++ typedef char __EFHW_BUILD_ASSERT_NAME(__LINE__)[(e) ? 1 : -1]
++#endif
++
++#endif /* __CI_EFHW_DEBUG_LINUX_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/efhw_config.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/efhw_config.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,43 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides some limits used in both kernel and userland code.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_EFAB_CONFIG_H__
++#define __CI_EFHW_EFAB_CONFIG_H__
++
++#define EFHW_MAX_NR_DEVS 5 /* max number of efhw devices supported */
++
++#endif /* __CI_EFHW_EFAB_CONFIG_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/efhw_types.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/efhw_types.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,382 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides struct efhw_nic and some related types.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_EFAB_TYPES_H__
++#define __CI_EFHW_EFAB_TYPES_H__
++
++#include <ci/efhw/efhw_config.h>
++#include <ci/efhw/hardware_sysdep.h>
++#include <ci/efhw/iopage_types.h>
++#include <ci/efhw/sysdep.h>
++
++/*--------------------------------------------------------------------
++ *
++ * forward type declarations
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_nic;
++
++/*--------------------------------------------------------------------
++ *
++ * Managed interface
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_buffer_table_allocation{
++ unsigned base;
++ unsigned order;
++};
++
++struct eventq_resource_hardware {
++ /*!iobuffer allocated for eventq - can be larger than eventq */
++ struct efhw_iopages iobuff;
++ unsigned iobuff_off;
++ struct efhw_buffer_table_allocation buf_tbl_alloc;
++ int capacity; /*!< capacity of event queue */
++};
++
++/*--------------------------------------------------------------------
++ *
++ * event queues and event driven callbacks
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_keventq {
++ int lock;
++ caddr_t evq_base;
++ int32_t evq_ptr;
++ uint32_t evq_mask;
++ unsigned instance;
++ struct eventq_resource_hardware hw;
++ struct efhw_ev_handler *ev_handlers;
++};
++
++/*--------------------------------------------------------------------
++ *
++ * filters
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_filter_spec {
++ uint dmaq_id;
++ uint32_t saddr_le32;
++ uint32_t daddr_le32;
++ uint16_t sport_le16;
++ uint16_t dport_le16;
++ unsigned tcp : 1;
++ unsigned full : 1;
++ unsigned rss : 1; /* not supported on A1 */
++ unsigned scatter : 1; /* not supported on A1 */
++};
++
++struct efhw_filter_depth {
++ unsigned needed;
++ unsigned max;
++};
++
++struct efhw_filter_search_limits {
++ unsigned tcp_full;
++ unsigned tcp_wild;
++ unsigned udp_full;
++ unsigned udp_wild;
++};
++
++
++/**********************************************************************
++ * Portable HW interface. ***************************************
++ **********************************************************************/
++
++/*--------------------------------------------------------------------
++ *
++ * EtherFabric Functional units - configuration and control
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_func_ops {
++
++ /*-------------- Initialisation ------------ */
++
++ /*! close down all hardware functional units - leaves NIC in a safe
++ state for driver unload */
++ void (*close_hardware) (struct efhw_nic *nic);
++
++ /*! initialise all hardware functional units */
++ int (*init_hardware) (struct efhw_nic *nic,
++ struct efhw_ev_handler *,
++ const uint8_t *mac_addr, int non_irq_evq);
++
++ /*-------------- Interrupt support ------------ */
++
++ /*! Main interrupt routine
++ ** This function returns,
++ ** - zero, if the IRQ was not generated by EF1
++ ** - non-zero, if EF1 was the source of the IRQ
++ **
++ **
++ ** opaque is an OS provided pointer for use by the OS callbacks
++ ** e.g in Windows used to indicate DPC scheduled
++ */
++ int (*interrupt) (struct efhw_nic *nic);
++
++ /*! Enable the interrupt */
++ void (*interrupt_enable) (struct efhw_nic *nic);
++
++ /*! Disable the interrupt */
++ void (*interrupt_disable) (struct efhw_nic *nic);
++
++ /*! Set interrupt moderation strategy for the given IRQ unit
++ ** val is in usec
++ */
++ void (*set_interrupt_moderation)(struct efhw_nic *nic, int evq,
++ uint val);
++
++ /*-------------- Event support ------------ */
++
++ /*! Enable the given event queue
++ depending on the underlying implementation (EF1 or Falcon) then
++ either a q_base_addr in host memory, or a buffer base id should
++ be proivded
++ */
++ void (*event_queue_enable) (struct efhw_nic *nic,
++ uint evq, /* evnt queue index */
++ uint evq_size, /* units of #entries */
++ dma_addr_t q_base_addr, uint buf_base_id,
++ int interrupting);
++
++ /*! Disable the given event queue (and any associated timer) */
++ void (*event_queue_disable) (struct efhw_nic *nic, uint evq,
++ int timer_only);
++
++ /*! request wakeup from the NIC on a given event Q */
++ void (*wakeup_request) (struct efhw_nic *nic, dma_addr_t q_base_addr,
++ int next_i, int evq);
++
++ /*! Push a SW event on a given eventQ */
++ void (*sw_event) (struct efhw_nic *nic, int data, int evq);
++
++ /*-------------- IP Filter API ------------ */
++
++ /*! Setup a given filter - The software can request a filter_i,
++ * but some EtherFabric implementations will override with
++ * a more suitable index
++ */
++ int (*ipfilter_set) (struct efhw_nic *nic, int type,
++ int *filter_i, int dmaq,
++ unsigned saddr_be32, unsigned sport_be16,
++ unsigned daddr_be32, unsigned dport_be16);
++
++ /*! Clear down a given filter */
++ void (*ipfilter_clear) (struct efhw_nic *nic, int filter_idx);
++
++ /*-------------- DMA support ------------ */
++
++ /*! Initialise NIC state for a given TX DMAQ */
++ void (*dmaq_tx_q_init) (struct efhw_nic *nic,
++ uint dmaq, uint evq, uint owner, uint tag,
++ uint dmaq_size, uint buf_idx, uint flags);
++
++ /*! Initialise NIC state for a given RX DMAQ */
++ void (*dmaq_rx_q_init) (struct efhw_nic *nic,
++ uint dmaq, uint evq, uint owner, uint tag,
++ uint dmaq_size, uint buf_idx, uint flags);
++
++ /*! Disable a given TX DMAQ */
++ void (*dmaq_tx_q_disable) (struct efhw_nic *nic, uint dmaq);
++
++ /*! Disable a given RX DMAQ */
++ void (*dmaq_rx_q_disable) (struct efhw_nic *nic, uint dmaq);
++
++ /*! Flush a given TX DMA channel */
++ int (*flush_tx_dma_channel) (struct efhw_nic *nic, uint dmaq);
++
++ /*! Flush a given RX DMA channel */
++ int (*flush_rx_dma_channel) (struct efhw_nic *nic, uint dmaq);
++
++ /*-------------- Buffer table Support ------------ */
++
++ /*! Initialise a buffer table page */
++ void (*buffer_table_set) (struct efhw_nic *nic,
++ dma_addr_t dma_addr,
++ uint bufsz, uint region,
++ int own_id, int buffer_id);
++
++ /*! Initialise a block of buffer table pages */
++ void (*buffer_table_set_n) (struct efhw_nic *nic, int buffer_id,
++ dma_addr_t dma_addr,
++ uint bufsz, uint region,
++ int n_pages, int own_id);
++
++ /*! Clear a block of buffer table pages */
++ void (*buffer_table_clear) (struct efhw_nic *nic, int buffer_id,
++ int num);
++
++ /*! Commit a buffer table update */
++ void (*buffer_table_commit) (struct efhw_nic *nic);
++
++ /*-------------- New filter API ------------ */
++
++ /*! Set a given filter */
++ int (*filter_set) (struct efhw_nic *nic, struct efhw_filter_spec *spec,
++ int *filter_idx_out);
++
++ /*! Clear a given filter */
++ void (*filter_clear) (struct efhw_nic *nic, int filter_idx);
++};
++
++
++/*----------------------------------------------------------------------------
++ *
++ * NIC type
++ *
++ *---------------------------------------------------------------------------*/
++
++struct efhw_device_type {
++ int arch; /* enum efhw_arch */
++ char variant; /* 'A', 'B', ... */
++ int revision; /* 0, 1, ... */
++};
++
++
++/*----------------------------------------------------------------------------
++ *
++ * EtherFabric NIC instance - nic.c for HW independent functions
++ *
++ *---------------------------------------------------------------------------*/
++
++/*! */
++struct efhw_nic {
++ /*! zero base index in efrm_nic_tablep->nic array */
++ int index;
++ int ifindex; /*!< OS level nic index */
++ struct net *nd_net;
++
++ struct efhw_device_type devtype;
++
++ /*! Options that can be set by user. */
++ unsigned options;
++# define NIC_OPT_EFTEST 0x1 /* owner is an eftest app */
++
++# define NIC_OPT_DEFAULT 0
++
++ /*! Internal flags that indicate hardware properties at runtime. */
++ unsigned flags;
++# define NIC_FLAG_NO_INTERRUPT 0x01 /* to be set at init time only */
++# define NIC_FLAG_TRY_MSI 0x02
++# define NIC_FLAG_MSI 0x04
++# define NIC_FLAG_OS_IRQ_EN 0x08
++
++ unsigned mtu; /*!< MAC MTU (includes MAC hdr) */
++
++ /* hardware resources */
++
++ /*! I/O address of the start of the bar */
++ volatile char __iomem *bar_ioaddr;
++
++ /*! Bar number of control aperture. */
++ unsigned ctr_ap_bar;
++ /*! Length of control aperture in bytes. */
++ unsigned ctr_ap_bytes;
++
++ uint8_t mac_addr[ETH_ALEN]; /*!< mac address */
++
++ /*! EtherFabric Functional Units -- functions */
++ const struct efhw_func_ops *efhw_func;
++
++ /*! This lock protects a number of misc NIC resources. It should
++ * only be used for things that can be at the bottom of the lock
++ * order. ie. You mustn't attempt to grab any other lock while
++ * holding this one.
++ */
++ spinlock_t *reg_lock;
++ spinlock_t the_reg_lock;
++
++ int buf_commit_outstanding; /*!< outstanding buffer commits */
++
++ /*! interrupt callbacks (hard-irq) */
++ void (*irq_handler) (struct efhw_nic *, int unit);
++
++ /*! event queues per driver */
++ struct efhw_keventq interrupting_evq;
++
++/* for marking when we are not using an IRQ unit
++ - 0 is a valid offset to an IRQ unit on EF1! */
++#define EFHW_IRQ_UNIT_UNUSED 0xffff
++ /*! interrupt unit in use for the interrupting event queue */
++ unsigned int irq_unit;
++
++ struct efhw_keventq non_interrupting_evq;
++
++ struct efhw_iopage irq_iobuff; /*!< Falcon SYSERR interrupt */
++
++ /* The new driverlink infrastructure. */
++ struct efx_dl_device *net_driver_dev;
++ struct efx_dlfilt_cb_s *dlfilter_cb;
++
++ /*! Bit masks of the sizes of event queues and dma queues supported
++ * by the nic. */
++ unsigned evq_sizes;
++ unsigned rxq_sizes;
++ unsigned txq_sizes;
++
++ /* Size of filter table. */
++ unsigned ip_filter_tbl_size;
++
++ /* Number of filters currently used */
++ unsigned ip_filter_tbl_used;
++
++ /* Dynamically allocated filter state. */
++ uint8_t *filter_in_use;
++ struct efhw_filter_spec *filter_spec_cache;
++
++ /* Currently required and maximum filter table search depths. */
++ struct efhw_filter_depth tcp_full_srch;
++ struct efhw_filter_depth tcp_wild_srch;
++ struct efhw_filter_depth udp_full_srch;
++ struct efhw_filter_depth udp_wild_srch;
++
++ /* Number of event queues, DMA queues and timers. */
++ unsigned num_evqs;
++ unsigned num_dmaqs;
++ unsigned num_timers;
++};
++
++
++#define EFHW_KVA(nic) ((nic)->bar_ioaddr)
++
++
++#endif /* __CI_EFHW_EFHW_TYPES_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/eventq.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/eventq.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,72 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains API provided by efhw/eventq.c file. This file is not
++ * designed for use outside of the SFC resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_EVENTQ_H__
++#define __CI_EFHW_EVENTQ_H__
++
++#include <ci/efhw/efhw_types.h>
++#include <ci/efhw/eventq_macros.h>
++
++/*! Poll the event queue. */
++extern int efhw_keventq_poll(struct efhw_nic *, struct efhw_keventq *);
++
++/*! Callbacks for handling events. */
++struct efhw_ev_handler {
++ void (*wakeup_fn)(struct efhw_nic *nic, unsigned);
++ void (*timeout_fn)(struct efhw_nic *nic, unsigned);
++ void (*dmaq_flushed_fn) (struct efhw_nic *, unsigned, int);
++};
++
++extern int efhw_keventq_ctor(struct efhw_nic *, int instance,
++ struct efhw_keventq *, struct efhw_ev_handler *);
++extern void efhw_keventq_dtor(struct efhw_nic *, struct efhw_keventq *);
++
++extern void efhw_handle_txdmaq_flushed(struct efhw_nic *,
++ struct efhw_ev_handler *,
++ efhw_event_t *);
++extern void efhw_handle_rxdmaq_flushed(struct efhw_nic *,
++ struct efhw_ev_handler *,
++ efhw_event_t *);
++extern void efhw_handle_wakeup_event(struct efhw_nic *,
++ struct efhw_ev_handler *,
++ efhw_event_t *);
++extern void efhw_handle_timeout_event(struct efhw_nic *,
++ struct efhw_ev_handler *,
++ efhw_event_t *);
++
++#endif /* __CI_EFHW_EVENTQ_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/eventq_macros.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/eventq_macros.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,77 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides some event-related macros. This file is designed for
++ * use from kernel and from the userland contexts.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_EVENTQ_MACROS_H__
++#define __CI_EFHW_EVENTQ_MACROS_H__
++
++#include <ci/efhw/common.h>
++
++/*--------------------------------------------------------------------
++ *
++ * Event Queue manipulation
++ *
++ *--------------------------------------------------------------------*/
++
++#define EFHW_EVENT_OFFSET(q, s, i) \
++ (((s)->evq_ptr - (i) * (int32_t)sizeof(efhw_event_t)) \
++ & (q)->evq_mask)
++
++#define EFHW_EVENT_PTR(q, s, i) \
++ ((efhw_event_t *)((q)->evq_base + EFHW_EVENT_OFFSET(q, s, i)))
++
++#define EFHW_EVENTQ_NEXT(s) \
++ do { ((s)->evq_ptr += sizeof(efhw_event_t)); } while (0)
++
++#define EFHW_EVENTQ_PREV(s) \
++ do { ((s)->evq_ptr -= sizeof(efhw_event_t)); } while (0)
++
++/* Be worried about this on byteswapped machines */
++/* Due to crazy chipsets, we see the event words being written in
++** arbitrary order (bug4539). So test for presence of event must ensure
++** that both halves have changed from the null.
++*/
++#define EFHW_IS_EVENT(evp) \
++ (((evp)->opaque.a != (uint32_t)-1) && \
++ ((evp)->opaque.b != (uint32_t)-1))
++#define EFHW_CLEAR_EVENT(evp) ((evp)->u64 = (uint64_t)-1)
++#define EFHW_CLEAR_EVENT_VALUE 0xff
++
++#define EFHW_EVENT_OVERFLOW(evq, s) \
++ (EFHW_IS_EVENT(EFHW_EVENT_PTR(evq, s, 1)))
++
++#endif /* __CI_EFHW_EVENTQ_MACROS_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/falcon.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/falcon.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,94 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains API provided by efhw/falcon.c file. This file is not
++ * designed for use outside of the SFC resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_FALCON_H__
++#define __CI_EFHW_FALCON_H__
++
++#include <ci/efhw/efhw_types.h>
++#include <ci/efhw/common.h>
++
++/*----------------------------------------------------------------------------
++ *
++ * Locks - unfortunately required
++ *
++ *---------------------------------------------------------------------------*/
++
++#define FALCON_LOCK_DECL irq_flags_t lock_state
++#define FALCON_LOCK_LOCK(nic) \
++ spin_lock_irqsave((nic)->reg_lock, lock_state)
++#define FALCON_LOCK_UNLOCK(nic) \
++ spin_unlock_irqrestore((nic)->reg_lock, lock_state)
++
++extern struct efhw_func_ops falcon_char_functional_units;
++
++/*! specify a pace value for a TX DMA Queue */
++extern void falcon_nic_pace(struct efhw_nic *nic, uint dmaq, uint pace);
++
++/*! configure the pace engine */
++extern void falcon_nic_pace_cfg(struct efhw_nic *nic, int fb_base,
++ int bin_thresh);
++
++/*! confirm buffer table updates - should be used for items where
++ loss of data would be unacceptable. E.g for the buffers that back
++ an event or DMA queue */
++extern void falcon_nic_buffer_table_confirm(struct efhw_nic *nic);
++
++/*! Reset the all the TX DMA queue pointers. */
++extern void falcon_clobber_tx_dma_ptrs(struct efhw_nic *nic, uint dmaq);
++
++extern int
++falcon_handle_char_event(struct efhw_nic *nic,
++ struct efhw_ev_handler *h, efhw_event_t *evp);
++
++/*! Acknowledge to HW that processing is complete on a given event queue */
++extern void falcon_nic_evq_ack(struct efhw_nic *nic, uint evq, /* evq id */
++ uint rptr, /* new read pointer update */
++ bool wakeup /* request a wakeup event if
++ ptr's != */
++ );
++
++extern void
++falcon_nic_buffer_table_set_n(struct efhw_nic *nic, int buffer_id,
++ dma_addr_t dma_addr, uint bufsz, uint region,
++ int n_pages, int own_id);
++
++extern int falcon_nic_filter_ctor(struct efhw_nic *nic);
++
++extern void falcon_nic_filter_dtor(struct efhw_nic *nic);
++
++#endif /* __CI_EFHW_FALCON_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/falcon_hash.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/falcon_hash.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,58 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains API provided by efhw/falcon_hash.c file.
++ * Function declared in this file are not exported from the Linux
++ * sfc_resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_FALCON_HASH_H__
++#define __CI_EFHW_FALCON_HASH_H__
++
++extern unsigned int
++falcon_hash_get_ip_key(unsigned int src_ip, unsigned int src_port,
++ unsigned int dest_ip, unsigned int dest_port,
++ int tcp, int full);
++
++extern unsigned int
++falcon_hash_function1(unsigned int key, unsigned int nfilters);
++
++extern unsigned int
++falcon_hash_function2(unsigned int key, unsigned int nfilters);
++
++extern unsigned int
++falcon_hash_iterator(unsigned int hash1, unsigned int hash2,
++ unsigned int n_search, unsigned int nfilters);
++
++#endif /* __CI_EFHW_FALCON_HASH_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/hardware_sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/hardware_sysdep.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,69 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides version-independent Linux kernel API for header files
++ * with hardware-related definitions (in ci/driver/efab/hardware*).
++ * Only kernels >=2.6.9 are supported.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_HARDWARE_LINUX_H__
++#define __CI_EFHW_HARDWARE_LINUX_H__
++
++#include <linux/io.h>
++
++#ifdef __LITTLE_ENDIAN
++#define EFHW_IS_LITTLE_ENDIAN
++#elif __BIG_ENDIAN
++#define EFHW_IS_BIG_ENDIAN
++#else
++#error Unknown endianness
++#endif
++
++#ifndef readq
++static inline uint64_t __readq(volatile void __iomem *addr)
++{
++ return *(volatile uint64_t *)addr;
++}
++#define readq(x) __readq(x)
++#endif
++
++#ifndef writeq
++static inline void __writeq(uint64_t v, volatile void __iomem *addr)
++{
++ *(volatile uint64_t *)addr = v;
++}
++#define writeq(val, addr) __writeq((val), (addr))
++#endif
++
++#endif /* __CI_EFHW_HARDWARE_LINUX_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/iopage.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/iopage.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,58 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains OS-independent API for allocating iopage types.
++ * The implementation of these functions is highly OS-dependent.
++ * This file is not designed for use outside of the SFC resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_RESOURCE_IOPAGE_H__
++#define __CI_DRIVER_RESOURCE_IOPAGE_H__
++
++#include <ci/efhw/efhw_types.h>
++
++/*--------------------------------------------------------------------
++ *
++ * memory allocation
++ *
++ *--------------------------------------------------------------------*/
++
++extern int efhw_iopage_alloc(struct efhw_nic *, struct efhw_iopage *p);
++extern void efhw_iopage_free(struct efhw_nic *, struct efhw_iopage *p);
++
++extern int efhw_iopages_alloc(struct efhw_nic *, struct efhw_iopages *p,
++ unsigned order);
++extern void efhw_iopages_free(struct efhw_nic *, struct efhw_iopages *p);
++
++#endif /* __CI_DRIVER_RESOURCE_IOPAGE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/iopage_types.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/iopage_types.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,190 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides struct efhw_page and struct efhw_iopage for Linux
++ * kernel.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_IOPAGE_LINUX_H__
++#define __CI_EFHW_IOPAGE_LINUX_H__
++
++#include <linux/gfp.h>
++#include <linux/hardirq.h>
++#include <linux/errno.h>
++#include <ci/efhw/debug.h>
++
++/*--------------------------------------------------------------------
++ *
++ * struct efhw_page: A single page of memory. Directly mapped in the
++ * driver, and can be mapped to userlevel.
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_page {
++ unsigned long kva;
++};
++
++static inline int efhw_page_alloc(struct efhw_page *p)
++{
++ p->kva = __get_free_page(in_interrupt()? GFP_ATOMIC : GFP_KERNEL);
++ return p->kva ? 0 : -ENOMEM;
++}
++
++static inline int efhw_page_alloc_zeroed(struct efhw_page *p)
++{
++ p->kva = get_zeroed_page(in_interrupt()? GFP_ATOMIC : GFP_KERNEL);
++ return p->kva ? 0 : -ENOMEM;
++}
++
++static inline void efhw_page_free(struct efhw_page *p)
++{
++ free_page(p->kva);
++ EFHW_DO_DEBUG(memset(p, 0, sizeof(*p)));
++}
++
++static inline char *efhw_page_ptr(struct efhw_page *p)
++{
++ return (char *)p->kva;
++}
++
++static inline unsigned efhw_page_pfn(struct efhw_page *p)
++{
++ return (unsigned)(__pa(p->kva) >> PAGE_SHIFT);
++}
++
++static inline void efhw_page_mark_invalid(struct efhw_page *p)
++{
++ p->kva = 0;
++}
++
++static inline int efhw_page_is_valid(struct efhw_page *p)
++{
++ return p->kva != 0;
++}
++
++static inline void efhw_page_init_from_va(struct efhw_page *p, void *va)
++{
++ p->kva = (unsigned long)va;
++}
++
++/*--------------------------------------------------------------------
++ *
++ * struct efhw_iopage: A single page of memory. Directly mapped in the driver,
++ * and can be mapped to userlevel. Can also be accessed by the NIC.
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_iopage {
++ struct efhw_page p;
++ dma_addr_t dma_addr;
++};
++
++static inline dma_addr_t efhw_iopage_dma_addr(struct efhw_iopage *p)
++{
++ return p->dma_addr;
++}
++
++#define efhw_iopage_ptr(iop) efhw_page_ptr(&(iop)->p)
++#define efhw_iopage_pfn(iop) efhw_page_pfn(&(iop)->p)
++#define efhw_iopage_mark_invalid(iop) efhw_page_mark_invalid(&(iop)->p)
++#define efhw_iopage_is_valid(iop) efhw_page_is_valid(&(iop)->p)
++
++/*--------------------------------------------------------------------
++ *
++ * struct efhw_iopages: A set of pages that are contiguous in physical
++ * memory. Directly mapped in the driver, and can be mapped to userlevel.
++ * Can also be accessed by the NIC.
++ *
++ * NB. The O/S may be unwilling to allocate many, or even any of these. So
++ * only use this type where the NIC really needs a physically contiguous
++ * buffer.
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_iopages {
++ caddr_t kva;
++ unsigned order;
++ dma_addr_t dma_addr;
++};
++
++static inline caddr_t efhw_iopages_ptr(struct efhw_iopages *p)
++{
++ return p->kva;
++}
++
++static inline unsigned efhw_iopages_pfn(struct efhw_iopages *p)
++{
++ return (unsigned)(__pa(p->kva) >> PAGE_SHIFT);
++}
++
++static inline dma_addr_t efhw_iopages_dma_addr(struct efhw_iopages *p)
++{
++ return p->dma_addr;
++}
++
++static inline unsigned efhw_iopages_size(struct efhw_iopages *p)
++{
++ return 1u << (p->order + PAGE_SHIFT);
++}
++
++/* struct efhw_iopage <-> struct efhw_iopages conversions for handling
++ * physically contiguous allocations in iobufsets for iSCSI. This allows
++ * the essential information about contiguous allocations from
++ * efhw_iopages_alloc() to be saved away in the struct efhw_iopage array in
++ * an iobufset. (Changing the iobufset resource to use a union type would
++ * involve a lot of code changes, and make the iobufset's metadata larger
++ * which could be bad as it's supposed to fit into a single page on some
++ * platforms.)
++ */
++static inline void
++efhw_iopage_init_from_iopages(struct efhw_iopage *iopage,
++ struct efhw_iopages *iopages, unsigned pageno)
++{
++ iopage->p.kva = ((unsigned long)efhw_iopages_ptr(iopages))
++ + (pageno * PAGE_SIZE);
++ iopage->dma_addr = efhw_iopages_dma_addr(iopages) +
++ (pageno * PAGE_SIZE);
++}
++
++static inline void
++efhw_iopages_init_from_iopage(struct efhw_iopages *iopages,
++ struct efhw_iopage *iopage, unsigned order)
++{
++ iopages->kva = (caddr_t) efhw_iopage_ptr(iopage);
++ EFHW_ASSERT(iopages->kva);
++ iopages->order = order;
++ iopages->dma_addr = efhw_iopage_dma_addr(iopage);
++}
++
++#endif /* __CI_EFHW_IOPAGE_LINUX_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/nic.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/nic.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,62 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains API provided by efhw/nic.c file. This file is not
++ * designed for use outside of the SFC resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_NIC_H__
++#define __CI_EFHW_NIC_H__
++
++#include <ci/efhw/efhw_types.h>
++#include <ci/efhw/public.h>
++
++
++/* Convert PCI info to device type. Returns false when device is not
++ * recognised.
++ */
++extern int efhw_device_type_init(struct efhw_device_type *dt,
++ int vendor_id, int device_id, int revision);
++
++/* Initialise fields that do not involve touching hardware. */
++extern void efhw_nic_init(struct efhw_nic *nic, unsigned flags,
++ unsigned options, struct efhw_device_type dev_type);
++
++/*! Destruct NIC resources */
++extern void efhw_nic_dtor(struct efhw_nic *nic);
++
++/*! Shutdown interrupts */
++extern void efhw_nic_close_interrupts(struct efhw_nic *nic);
++
++#endif /* __CI_EFHW_NIC_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/public.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/public.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,104 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public API of efhw library exported from the SFC
++ * resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_PUBLIC_H__
++#define __CI_EFHW_PUBLIC_H__
++
++#include <ci/efhw/common.h>
++#include <ci/efhw/efhw_types.h>
++
++/*! Returns true if we have some EtherFabric functional units -
++ whether configured or not */
++static inline int efhw_nic_have_functional_units(struct efhw_nic *nic)
++{
++ return nic->efhw_func != 0;
++}
++
++/*! Returns true if the EtherFabric functional units have been configured */
++static inline int efhw_nic_have_hw(struct efhw_nic *nic)
++{
++ return efhw_nic_have_functional_units(nic) && (EFHW_KVA(nic) != 0);
++}
++
++/*! Helper function to allocate the iobuffer needed by an eventq
++ * - it ensures the eventq has the correct alignment for the NIC
++ *
++ * \param rm Event-queue resource manager
++ * \param instance Event-queue instance (index)
++ * \param buf_bytes Requested size of eventq
++ * \return < 0 if iobuffer allocation fails
++ */
++int efhw_nic_event_queue_alloc_iobuffer(struct efhw_nic *nic,
++ struct eventq_resource_hardware *h,
++ int evq_instance, unsigned buf_bytes);
++
++extern void falcon_nic_set_rx_usr_buf_size(struct efhw_nic *,
++ int rx_usr_buf_size);
++
++/*! Get RX filter search limits from RX_FILTER_CTL_REG.
++ * use_raw_values = 0 to get actual depth of search, or 1 to get raw values
++ * from register.
++ */
++extern void
++falcon_nic_get_rx_filter_search_limits(struct efhw_nic *nic,
++ struct efhw_filter_search_limits *lim,
++ int use_raw_values);
++
++/*! Set RX filter search limits in RX_FILTER_CTL_REG.
++ * use_raw_values = 0 if specifying actual depth of search, or 1 if specifying
++ * raw values to write to the register.
++ */
++extern void
++falcon_nic_set_rx_filter_search_limits(struct efhw_nic *nic,
++ struct efhw_filter_search_limits *lim,
++ int use_raw_values);
++
++
++/*! Legacy RX IP filter search depth control interface */
++extern void
++falcon_nic_rx_filter_ctl_set(struct efhw_nic *nic, uint32_t tcp_full,
++ uint32_t tcp_wild,
++ uint32_t udp_full, uint32_t udp_wild);
++
++/*! Legacy RX IP filter search depth control interface */
++extern void
++falcon_nic_rx_filter_ctl_get(struct efhw_nic *nic, uint32_t *tcp_full,
++ uint32_t *tcp_wild,
++ uint32_t *udp_full, uint32_t *udp_wild);
++
++#endif /* __CI_EFHW_PUBLIC_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efhw/sysdep.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,55 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides version-independent Linux kernel API for efhw library.
++ * Only kernels >=2.6.9 are supported.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_SYSDEP_LINUX_H__
++#define __CI_EFHW_SYSDEP_LINUX_H__
++
++#include <linux/module.h>
++#include <linux/spinlock.h>
++#include <linux/delay.h>
++#include <linux/vmalloc.h>
++#include <linux/if_ether.h>
++
++#include <linux/netdevice.h> /* necessary for etherdevice.h on some kernels */
++#include <linux/etherdevice.h>
++
++typedef unsigned long irq_flags_t;
++
++#define spin_lock_destroy(l_) do {} while (0)
++
++#endif /* __CI_EFHW_SYSDEP_LINUX_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/buddy.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/buddy.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,68 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides private API for buddy allocator. This API is not
++ * designed for use outside of SFC resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_BUDDY_H__
++#define __CI_EFRM_BUDDY_H__
++
++#include <ci/efrm/sysdep.h>
++
++/*! Comment? */
++struct efrm_buddy_allocator {
++ struct list_head *free_lists; /* array[order+1] */
++ struct list_head *links; /* array[1<<order] */
++ uint8_t *orders; /* array[1<<order] */
++ unsigned order; /*!< total size == (1 << order) */
++ /* ?? Consider recording largest available order + for each order the
++ ** smallest available order that is big enough.
++ */
++};
++
++ /*! Returns total size of managed space. */
++static inline unsigned long efrm_buddy_size(struct efrm_buddy_allocator *b)
++{
++ return 1ul << b->order;
++}
++
++int efrm_buddy_ctor(struct efrm_buddy_allocator *b, unsigned order);
++void efrm_buddy_dtor(struct efrm_buddy_allocator *b);
++int efrm_buddy_alloc(struct efrm_buddy_allocator *b, unsigned order);
++void efrm_buddy_free(struct efrm_buddy_allocator *b, unsigned addr,
++ unsigned order);
++
++
++#endif /* __CI_EFRM_BUDDY_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/buffer_table.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/buffer_table.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,81 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides private buffer table API. This API is not designed
++ * for use outside of SFC resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_BUFFER_TABLE_H__
++#define __CI_EFRM_BUFFER_TABLE_H__
++
++#include <ci/efhw/efhw_types.h>
++
++/*--------------------------------------------------------------------
++ *
++ * NIC's buffer table.
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Managed interface. */
++
++/*! construct a managed buffer table object, allocated over a region of
++ * the NICs buffer table space
++ */
++extern int efrm_buffer_table_ctor(unsigned low, unsigned high);
++/*! destructor for above */
++extern void efrm_buffer_table_dtor(void);
++
++/*! allocate a contiguous region of buffer table space */
++extern int efrm_buffer_table_alloc(unsigned order,
++ struct efhw_buffer_table_allocation *a);
++
++
++/*--------------------------------------------------------------------
++ *
++ * buffer table operations through the HW independent API
++ *
++ *--------------------------------------------------------------------*/
++
++/*! free a previously allocated region of buffer table space */
++extern void efrm_buffer_table_free(struct efhw_buffer_table_allocation *a);
++
++/*! commit the update of a buffer table entry to every NIC */
++extern void efrm_buffer_table_commit(void);
++
++extern void efrm_buffer_table_set(struct efhw_buffer_table_allocation *,
++ struct efhw_nic *,
++ unsigned i, dma_addr_t dma_addr, int owner);
++
++
++#endif /* __CI_EFRM_BUFFER_TABLE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/debug.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/debug.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,78 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides debug-related API for efrm library using Linux kernel
++ * primitives.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_DEBUG_LINUX_H__
++#define __CI_EFRM_DEBUG_LINUX_H__
++
++#define EFRM_PRINTK_PREFIX "[sfc efrm] "
++
++#define EFRM_PRINTK(level, fmt, ...) \
++ printk(level EFRM_PRINTK_PREFIX fmt "\n", __VA_ARGS__)
++
++/* Following macros should be used with non-zero format parameters
++ * due to __VA_ARGS__ limitations. Use "%s" with __func__ if you can't
++ * find better parameters. */
++#define EFRM_ERR(fmt, ...) EFRM_PRINTK(KERN_ERR, fmt, __VA_ARGS__)
++#define EFRM_WARN(fmt, ...) EFRM_PRINTK(KERN_WARNING, fmt, __VA_ARGS__)
++#define EFRM_NOTICE(fmt, ...) EFRM_PRINTK(KERN_NOTICE, fmt, __VA_ARGS__)
++#if !defined(NDEBUG)
++#define EFRM_TRACE(fmt, ...) EFRM_PRINTK(KERN_DEBUG, fmt, __VA_ARGS__)
++#else
++#define EFRM_TRACE(fmt, ...)
++#endif
++
++#ifndef NDEBUG
++#define EFRM_ASSERT(cond) BUG_ON((cond) == 0)
++#define _EFRM_ASSERT(cond, file, line) \
++ do { \
++ if (unlikely(!(cond))) { \
++ EFRM_ERR("assertion \"%s\" failed at %s %d", \
++ #cond, file, line); \
++ BUG(); \
++ } \
++ } while (0)
++
++#define EFRM_DO_DEBUG(expr) expr
++#define EFRM_VERIFY_EQ(expr, val) EFRM_ASSERT((expr) == (val))
++#else
++#define EFRM_ASSERT(cond)
++#define EFRM_DO_DEBUG(expr)
++#define EFRM_VERIFY_EQ(expr, val) expr
++#endif
++
++#endif /* __CI_EFRM_DEBUG_LINUX_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/driver_private.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/driver_private.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,89 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides private API of efrm library to be used from the SFC
++ * resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_DRIVER_PRIVATE_H__
++#define __CI_EFRM_DRIVER_PRIVATE_H__
++
++#include <ci/efrm/resource.h>
++#include <ci/efrm/sysdep.h>
++
++/*--------------------------------------------------------------------
++ *
++ * global variables
++ *
++ *--------------------------------------------------------------------*/
++
++/* Internal structure for resource driver */
++extern struct efrm_resource_manager *efrm_rm_table[];
++
++/*--------------------------------------------------------------------
++ *
++ * efrm_nic_table handling
++ *
++ *--------------------------------------------------------------------*/
++
++struct efrm_nic;
++
++extern void efrm_driver_ctor(void);
++extern void efrm_driver_dtor(void);
++extern int efrm_driver_register_nic(struct efrm_nic *, int nic_index,
++ int ifindex);
++extern int efrm_driver_unregister_nic(struct efrm_nic *);
++
++/*--------------------------------------------------------------------
++ *
++ * create/destroy resource managers
++ *
++ *--------------------------------------------------------------------*/
++
++struct vi_resource_dimensions {
++ unsigned evq_int_min, evq_int_lim;
++ unsigned evq_timer_min, evq_timer_lim;
++ unsigned rxq_min, rxq_lim;
++ unsigned txq_min, txq_lim;
++};
++
++/*! Initialise resources */
++extern int
++efrm_resources_init(const struct vi_resource_dimensions *,
++ int buffer_table_min, int buffer_table_lim);
++
++/*! Tear down resources */
++extern void efrm_resources_fini(void);
++
++#endif /* __CI_EFRM_DRIVER_PRIVATE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/efrm_client.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/efrm_client.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,32 @@
++#ifndef __EFRM_CLIENT_H__
++#define __EFRM_CLIENT_H__
++
++
++struct efrm_client;
++
++
++struct efrm_client_callbacks {
++ /* Called before device is reset. Callee may block. */
++ void (*pre_reset)(struct efrm_client *, void *user_data);
++ void (*stop)(struct efrm_client *, void *user_data);
++ void (*restart)(struct efrm_client *, void *user_data);
++};
++
++
++#define EFRM_IFINDEX_DEFAULT -1
++
++
++/* NB. Callbacks may be invoked even before this returns. */
++extern int efrm_client_get(int ifindex, struct efrm_client_callbacks *,
++ void *user_data, struct efrm_client **client_out);
++extern void efrm_client_put(struct efrm_client *);
++
++extern struct efhw_nic *efrm_client_get_nic(struct efrm_client *);
++
++#if 0
++/* For each resource type... */
++extern void efrm_x_resource_resume(struct x_resource *);
++#endif
++
++
++#endif /* __EFRM_CLIENT_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/efrm_nic.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/efrm_nic.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,26 @@
++#ifndef __EFRM_NIC_H__
++#define __EFRM_NIC_H__
++
++#include <ci/efhw/efhw_types.h>
++
++
++struct efrm_nic_per_vi {
++ unsigned long state;
++ struct vi_resource *vi;
++};
++
++
++struct efrm_nic {
++ struct efhw_nic efhw_nic;
++ struct list_head link;
++ struct list_head clients;
++ struct efrm_nic_per_vi *vis;
++};
++
++
++#define efrm_nic(_efhw_nic) \
++ container_of(_efhw_nic, struct efrm_nic, efhw_nic)
++
++
++
++#endif /* __EFRM_NIC_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/filter.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/filter.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,122 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public API for filter resource.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_FILTER_H__
++#define __CI_EFRM_FILTER_H__
++
++#include <ci/efrm/resource.h>
++#include <ci/efhw/common.h>
++
++
++struct filter_resource;
++struct vi_resource;
++struct efrm_client;
++
++
++/*!
++ * Allocate filter resource.
++ *
++ * \param vi_parent VI resource to use as parent. The function takes
++ * reference to the VI resource on success.
++ * \param frs_out pointer to return the new filter resource
++ *
++ * \return status code; if non-zero, frs_out is unchanged
++ */
++extern int
++efrm_filter_resource_alloc(struct vi_resource *vi_parent,
++ struct filter_resource **frs_out);
++
++extern void
++efrm_filter_resource_release(struct filter_resource *);
++
++
++extern int efrm_filter_resource_clear(struct filter_resource *frs);
++
++extern int __efrm_filter_resource_set(struct filter_resource *frs, int type,
++ unsigned saddr_be32, uint16_t sport_be16,
++ unsigned daddr_be32, uint16_t dport_be16);
++
++static inline int
++efrm_filter_resource_tcp_set(struct filter_resource *frs,
++ unsigned saddr, uint16_t sport,
++ unsigned daddr, uint16_t dport)
++{
++ int type;
++
++ EFRM_ASSERT((saddr && sport) || (!saddr && !sport));
++
++ type =
++ saddr ? EFHW_IP_FILTER_TYPE_TCP_FULL :
++ EFHW_IP_FILTER_TYPE_TCP_WILDCARD;
++
++ return __efrm_filter_resource_set(frs, type,
++ saddr, sport, daddr, dport);
++}
++
++static inline int
++efrm_filter_resource_udp_set(struct filter_resource *frs,
++ unsigned saddr, uint16_t sport,
++ unsigned daddr, uint16_t dport)
++{
++ int type;
++
++ EFRM_ASSERT((saddr && sport) || (!saddr && !sport));
++
++ type =
++ saddr ? EFHW_IP_FILTER_TYPE_UDP_FULL :
++ EFHW_IP_FILTER_TYPE_UDP_WILDCARD;
++
++ return __efrm_filter_resource_set(frs,
++ type, saddr, sport, daddr, dport);
++}
++
++
++extern int
++efrm_filter_resource_instance(struct filter_resource *);
++
++extern struct efrm_resource *
++efrm_filter_resource_to_resource(struct filter_resource *);
++
++extern struct filter_resource *
++efrm_filter_resource_from_resource(struct efrm_resource *);
++
++extern void
++efrm_filter_resource_free(struct filter_resource *);
++
++
++#endif /* __CI_EFRM_FILTER_H__ */
++/*! \cidoxg_end */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/iobufset.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/iobufset.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,110 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public API for iobufset resource.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_IOBUFSET_H__
++#define __CI_EFRM_IOBUFSET_H__
++
++#include <ci/efrm/vi_resource.h>
++
++/*! Iobufset resource structture.
++ * Users should not access the structure fields directly, but use the API
++ * below.
++ * However, this structure should not be moved out of public headers,
++ * because part of API (ex. efrm_iobufset_dma_addr function) is inline and
++ * is used in the fast-path code.
++ */
++struct iobufset_resource {
++ struct efrm_resource rs;
++ struct vi_resource *evq;
++ struct iobufset_resource *linked;
++ struct efhw_buffer_table_allocation buf_tbl_alloc;
++ unsigned int n_bufs;
++ unsigned int pages_per_contiguous_chunk;
++ unsigned chunk_order;
++ struct efhw_iopage bufs[1];
++ /*!< up to n_bufs can follow this, so this must be the last member */
++};
++
++#define iobufset_resource(rs1) \
++ container_of((rs1), struct iobufset_resource, rs)
++
++/*!
++ * Allocate iobufset resource.
++ *
++ * \param vi VI that "owns" these buffers. Grabs a reference
++ * on success.
++ * \param linked Uses memory from an existing iobufset. Grabs a
++ * reference on success.
++ * \param iobrs_out pointer to return the new filter resource
++ *
++ * \return status code; if non-zero, frs_out is unchanged
++ */
++extern int
++efrm_iobufset_resource_alloc(int32_t n_pages,
++ int32_t pages_per_contiguous_chunk,
++ struct vi_resource *vi,
++ struct iobufset_resource *linked,
++ bool phys_addr_mode,
++ struct iobufset_resource **iobrs_out);
++
++extern void efrm_iobufset_resource_free(struct iobufset_resource *);
++extern void efrm_iobufset_resource_release(struct iobufset_resource *);
++
++static inline char *
++efrm_iobufset_ptr(struct iobufset_resource *rs, unsigned offs)
++{
++ EFRM_ASSERT(offs < (unsigned)(rs->n_bufs << PAGE_SHIFT));
++ return efhw_iopage_ptr(&rs->bufs[offs >> PAGE_SHIFT])
++ + (offs & (PAGE_SIZE - 1));
++}
++
++static inline char *efrm_iobufset_page_ptr(struct iobufset_resource *rs,
++ unsigned page_i)
++{
++ EFRM_ASSERT(page_i < (unsigned)rs->n_bufs);
++ return efhw_iopage_ptr(&rs->bufs[page_i]);
++}
++
++static inline dma_addr_t
++efrm_iobufset_dma_addr(struct iobufset_resource *rs, unsigned offs)
++{
++ EFRM_ASSERT(offs < (unsigned)(rs->n_bufs << PAGE_SHIFT));
++ return efhw_iopage_dma_addr(&rs->bufs[offs >> PAGE_SHIFT])
++ + (offs & (PAGE_SIZE - 1));
++}
++
++#endif /* __CI_EFRM_IOBUFSET_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/nic_set.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/nic_set.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,104 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public API for NIC sets.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_NIC_SET_H__
++#define __CI_EFRM_NIC_SET_H__
++
++#include <ci/efrm/debug.h>
++#include <ci/efhw/common_sysdep.h>
++#include <ci/efhw/efhw_config.h>
++
++/*--------------------------------------------------------------------
++ *
++ * efrm_nic_set_t - tracks which NICs something has been done on
++ *
++ *--------------------------------------------------------------------*/
++
++/* Internal suructure of efrm_nic_set_t should not be referenced outside of
++ * this file. Add a new accessor if you should do it. */
++typedef struct {
++ uint32_t nics;
++} efrm_nic_set_t;
++
++#if EFHW_MAX_NR_DEVS > 32
++#error change efrm_nic_set to handle EFHW_MAX_NR_DEVS number of devices
++#endif
++
++static inline bool
++efrm_nic_set_read(const efrm_nic_set_t *nic_set, unsigned index)
++{
++ EFRM_ASSERT(nic_set);
++ EFRM_ASSERT(index < EFHW_MAX_NR_DEVS && index < 32);
++ return (nic_set->nics & (1 << index)) ? true : false;
++}
++
++static inline void
++efrm_nic_set_write(efrm_nic_set_t *nic_set, unsigned index, bool value)
++{
++ EFRM_ASSERT(nic_set);
++ EFRM_ASSERT(index < EFHW_MAX_NR_DEVS && index < 32);
++ EFRM_ASSERT(value == false || value == true);
++ nic_set->nics = (nic_set->nics & (~(1 << index))) + (value << index);
++}
++
++static inline void efrm_nic_set_clear(efrm_nic_set_t *nic_set)
++{
++ nic_set->nics = 0;
++}
++
++static inline void efrm_nic_set_all(efrm_nic_set_t *nic_set)
++{
++ nic_set->nics = 0xffffffff;
++}
++
++static inline bool efrm_nic_set_is_all_clear(efrm_nic_set_t *nic_set)
++{
++ return nic_set->nics == 0 ? true : false;
++}
++
++#define EFRM_NIC_SET_FMT "%x"
++
++static inline uint32_t efrm_nic_set_pri_arg(efrm_nic_set_t *nic_set)
++{
++ return nic_set->nics;
++}
++
++#define EFRM_FOR_EACH_NIC_INDEX_IN_SET(_set, _nic_i) \
++ for ((_nic_i) = 0; (_nic_i) < EFHW_MAX_NR_DEVS; ++(_nic_i)) \
++ if (efrm_nic_set_read((_set), (_nic_i)))
++
++#endif /* __CI_EFRM_NIC_SET_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/nic_table.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/nic_table.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,98 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public API for NIC table.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_NIC_TABLE_H__
++#define __CI_EFRM_NIC_TABLE_H__
++
++#include <ci/efhw/efhw_types.h>
++#include <ci/efrm/sysdep.h>
++
++/*--------------------------------------------------------------------
++ *
++ * struct efrm_nic_table - top level driver object keeping all NICs -
++ * implemented in driver_object.c
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Comment? */
++struct efrm_nic_table {
++ /*! nics attached to this driver */
++ struct efhw_nic *nic[EFHW_MAX_NR_DEVS];
++ /*! pointer to an arbitrary struct efhw_nic if one exists;
++ * for code which does not care which NIC it wants but
++ * still needs one. Note you cannot assume nic[0] exists. */
++ struct efhw_nic *a_nic;
++ uint32_t nic_count; /*!< number of nics attached to this driver */
++ spinlock_t lock; /*!< lock for table modifications */
++ atomic_t ref_count; /*!< refcount for users of nic table */
++};
++
++/* Resource driver structures used by other drivers as well */
++extern struct efrm_nic_table *efrm_nic_tablep;
++
++static inline void efrm_nic_table_hold(void)
++{
++ atomic_inc(&efrm_nic_tablep->ref_count);
++}
++
++static inline void efrm_nic_table_rele(void)
++{
++ atomic_dec(&efrm_nic_tablep->ref_count);
++}
++
++static inline int efrm_nic_table_held(void)
++{
++ return atomic_read(&efrm_nic_tablep->ref_count) != 0;
++}
++
++/* Run code block _x multiple times with variable nic set to each
++ * registered NIC in turn.
++ * DO NOT "break" out of this loop early. */
++#define EFRM_FOR_EACH_NIC(_nic_i, _nic) \
++ for ((_nic_i) = (efrm_nic_table_hold(), 0); \
++ (_nic_i) < EFHW_MAX_NR_DEVS || (efrm_nic_table_rele(), 0); \
++ (_nic_i)++) \
++ if (((_nic) = efrm_nic_tablep->nic[_nic_i]))
++
++#define EFRM_FOR_EACH_NIC_IN_SET(_set, _i, _nic) \
++ for ((_i) = (efrm_nic_table_hold(), 0); \
++ (_i) < EFHW_MAX_NR_DEVS || (efrm_nic_table_rele(), 0); \
++ ++(_i)) \
++ if (((_nic) = efrm_nic_tablep->nic[_i]) && \
++ efrm_nic_set_read((_set), (_i)))
++
++#endif /* __CI_EFRM_NIC_TABLE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/private.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/private.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,118 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides private API of efrm library -- resource handling.
++ * This API is not designed for use outside of SFC resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_PRIVATE_H__
++#define __CI_EFRM_PRIVATE_H__
++
++#include <ci/efrm/resource.h>
++#include <ci/efrm/driver_private.h>
++#include <ci/efrm/sysdep.h>
++#include <ci/efrm/debug.h>
++
++/*--------------------------------------------------------------------
++ *
++ * create resource managers
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Create a resource manager for various types of resources
++ */
++extern int
++efrm_create_iobufset_resource_manager(struct efrm_resource_manager **out);
++
++extern int
++efrm_create_filter_resource_manager(struct efrm_resource_manager **out);
++
++extern int
++efrm_create_vi_resource_manager(struct efrm_resource_manager **out,
++ const struct vi_resource_dimensions *);
++
++
++/*--------------------------------------------------------------------
++ *
++ * Instance pool management
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Allocate instance pool. Use kfifo_vfree to destroy it. */
++static inline int
++efrm_kfifo_id_ctor(struct kfifo **ids_out,
++ unsigned int base, unsigned int limit, spinlock_t *lock)
++{
++ unsigned int i;
++ struct kfifo *ids;
++ unsigned char *buffer;
++ unsigned int size = roundup_pow_of_two((limit - base) * sizeof(int));
++ EFRM_ASSERT(base <= limit);
++ buffer = vmalloc(size);
++ ids = kfifo_init(buffer, size, GFP_KERNEL, lock);
++ if (IS_ERR(ids))
++ return PTR_ERR(ids);
++ for (i = base; i < limit; i++)
++ EFRM_VERIFY_EQ(__kfifo_put(ids, (unsigned char *)&i,
++ sizeof(i)), sizeof(i));
++
++ *ids_out = ids;
++ return 0;
++}
++
++/*--------------------------------------------------------------------
++ *
++ * Various private functions
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Initialize the fields in the provided resource manager memory area
++ * \param rm The area of memory to be initialized
++ * \param dtor A method to destroy the resource manager
++ * \param name A Textual name for the resource manager
++ * \param type The type of resource managed
++ * \param initial_table_size Initial size of the ID table
++ * \param auto_destroy Destroy resource manager on driver onload iff true
++ *
++ * A default table size is provided if the value 0 is provided.
++ */
++extern int
++efrm_resource_manager_ctor(struct efrm_resource_manager *rm,
++ void (*dtor)(struct efrm_resource_manager *),
++ const char *name, unsigned type);
++
++extern void efrm_resource_manager_dtor(struct efrm_resource_manager *rm);
++
++
++#endif /* __CI_EFRM_PRIVATE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/resource.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/resource.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,119 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public interface of efrm library -- resource handling.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_RESOURCE_H__
++#define __CI_EFRM_RESOURCE_H__
++
++/*--------------------------------------------------------------------
++ *
++ * headers for type dependencies
++ *
++ *--------------------------------------------------------------------*/
++
++#include <ci/efhw/efhw_types.h>
++#include <ci/efrm/resource_id.h>
++#include <ci/efrm/sysdep.h>
++#include <ci/efhw/common_sysdep.h>
++
++#ifndef __ci_driver__
++#error "Driver-only file"
++#endif
++
++/*--------------------------------------------------------------------
++ *
++ * struct efrm_resource - represents an allocated resource
++ * (eg. pinned pages of memory, or resource on a NIC)
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Representation of an allocated resource */
++struct efrm_resource {
++ int rs_ref_count;
++ efrm_resource_handle_t rs_handle;
++ struct efrm_client *rs_client;
++ struct list_head rs_client_link;
++ struct list_head rs_manager_link;
++};
++
++/*--------------------------------------------------------------------
++ *
++ * managed resource abstraction
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Factory for resources of a specific type */
++struct efrm_resource_manager {
++ const char *rm_name; /*!< human readable only */
++ spinlock_t rm_lock;
++#ifndef NDEBUG
++ unsigned rm_type;
++#endif
++ int rm_resources;
++ int rm_resources_hiwat;
++ struct list_head rm_resources_list;
++ /**
++ * Destructor for the resource manager. Other resource managers
++ * might be already dead, although the system guarantees that
++ * managers are destructed in the order by which they were created
++ */
++ void (*rm_dtor)(struct efrm_resource_manager *);
++};
++
++#ifdef NDEBUG
++# define EFRM_RESOURCE_ASSERT_VALID(rs, rc_mbz)
++# define EFRM_RESOURCE_MANAGER_ASSERT_VALID(rm)
++#else
++/*! Check validity of resource and report on failure */
++extern void efrm_resource_assert_valid(struct efrm_resource *,
++ int rc_may_be_zero,
++ const char *file, int line);
++# define EFRM_RESOURCE_ASSERT_VALID(rs, rc_mbz) \
++ efrm_resource_assert_valid((rs), (rc_mbz), __FILE__, __LINE__)
++
++/*! Check validity of resource manager and report on failure */
++extern void efrm_resource_manager_assert_valid(struct efrm_resource_manager *,
++ const char *file, int line);
++# define EFRM_RESOURCE_MANAGER_ASSERT_VALID(rm) \
++ efrm_resource_manager_assert_valid((rm), __FILE__, __LINE__)
++#endif
++
++
++extern void efrm_resource_ref(struct efrm_resource *rs);
++extern int __efrm_resource_release(struct efrm_resource *);
++
++
++#endif /* __CI_EFRM_RESOURCE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/resource_id.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/resource_id.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,104 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public type and definitions resource handle, and the
++ * definitions of resource types.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_EFRM_RESOURCE_ID_H__
++#define __CI_DRIVER_EFRM_RESOURCE_ID_H__
++
++/***********************************************************************
++ * Resource handles
++ *
++ * Resource handles are intended for identifying resources at kernel
++ * level, within the context of a particular NIC. particularly because
++ * for some resource types, the low 16 bites correspond to hardware
++ * IDs. They were historically also used at user level, with a nonce
++ * stored in the bits 16 to 27 (inclusive), but that approach is
++ * deprecated (but sill alive!).
++ *
++ * The handle value 0 is used to mean "no resource".
++ * Identify resources within the context of a file descriptor at user
++ * level.
++ ***********************************************************************/
++
++typedef struct {
++ uint32_t handle;
++} efrm_resource_handle_t;
++
++/* You may think these following functions should all have
++ * _HANDLE_ in their names, but really we are providing an abstract set
++ * of methods on a (hypothetical) efrm_resource_t object, with
++ * efrm_resource_handle_t being just the reference one holds to access
++ * the object (aka "this" or "self").
++ */
++
++/* Below I use inline instead of macros where possible in order to get
++ * more type checking help from the compiler; hopefully we'll never
++ * have to rewrite these to use #define as we've found some horrible
++ * compiler on which we cannot make static inline do the Right Thing (tm).
++ *
++ * For consistency and to avoid pointless change I spell these
++ * routines as macro names (CAPTILIZE_UNDERSCORED), which also serves
++ * to remind people they are compact and inlined.
++ */
++
++#define EFRM_RESOURCE_FMT "[rs:%08x]"
++
++static inline unsigned EFRM_RESOURCE_PRI_ARG(efrm_resource_handle_t h)
++{
++ return h.handle;
++}
++
++static inline unsigned EFRM_RESOURCE_INSTANCE(efrm_resource_handle_t h)
++{
++ return h.handle & 0x0000ffff;
++}
++
++static inline unsigned EFRM_RESOURCE_TYPE(efrm_resource_handle_t h)
++{
++ return (h.handle & 0xf0000000) >> 28;
++}
++
++/***********************************************************************
++ * Resource type codes
++ ***********************************************************************/
++
++#define EFRM_RESOURCE_IOBUFSET 0x0
++#define EFRM_RESOURCE_VI 0x1
++#define EFRM_RESOURCE_FILTER 0x2
++#define EFRM_RESOURCE_NUM 0x3 /* This isn't a resource! */
++
++#define EFRM_RESOURCE_NAME(type) \
++ ((type) == EFRM_RESOURCE_IOBUFSET? "IOBUFSET" : \
++ (type) == EFRM_RESOURCE_VI? "VI" : \
++ (type) == EFRM_RESOURCE_FILTER? "FILTER" : \
++ "<invalid>")
++
++#endif /* __CI_DRIVER_EFRM_RESOURCE_ID_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/sysdep.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,46 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides Linux-like system-independent API for efrm library.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_SYSDEP_H__
++#define __CI_EFRM_SYSDEP_H__
++
++/* Spinlocks are defined in efhw/sysdep.h */
++#include <ci/efhw/sysdep.h>
++
++#include <ci/efrm/sysdep_linux.h>
++
++#endif /* __CI_EFRM_SYSDEP_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/sysdep_linux.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/sysdep_linux.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,93 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides version-independent Linux kernel API for efrm library.
++ * Only kernels >=2.6.9 are supported.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Kfifo API is partially stolen from linux-2.6.22/include/linux/list.h
++ * Copyright (C) 2004 Stelian Pop <stelian@popies.net>
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_SYSDEP_LINUX_H__
++#define __CI_EFRM_SYSDEP_LINUX_H__
++
++#include <linux/list.h>
++#include <linux/vmalloc.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/workqueue.h>
++#include <linux/gfp.h>
++#include <linux/slab.h>
++#include <linux/hardirq.h>
++#include <linux/kernel.h>
++#include <linux/if_ether.h>
++#include <linux/completion.h>
++#include <linux/in.h>
++#include <linux/log2.h>
++#include <linux/kfifo.h>
++
++
++/********************************************************************
++ *
++ * List API
++ *
++ ********************************************************************/
++
++static inline struct list_head *list_pop(struct list_head *list)
++{
++ struct list_head *link = list->next;
++ list_del(link);
++ return link;
++}
++
++static inline struct list_head *list_pop_tail(struct list_head *list)
++{
++ struct list_head *link = list->prev;
++ list_del(link);
++ return link;
++}
++
++/********************************************************************
++ *
++ * Kfifo API
++ *
++ ********************************************************************/
++
++static inline void kfifo_vfree(struct kfifo *fifo)
++{
++ vfree(fifo->buffer);
++ kfree(fifo);
++}
++
++#endif /* __CI_EFRM_SYSDEP_LINUX_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/vi_resource.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/vi_resource.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,157 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains public API for VI resource.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_VI_RESOURCE_H__
++#define __CI_EFRM_VI_RESOURCE_H__
++
++#include <ci/efhw/efhw_types.h>
++#include <ci/efrm/resource.h>
++#include <ci/efrm/debug.h>
++
++struct vi_resource;
++
++/* Make these inline instead of macros for type checking */
++static inline struct vi_resource *
++efrm_to_vi_resource(struct efrm_resource *rs)
++{
++ EFRM_ASSERT(EFRM_RESOURCE_TYPE(rs->rs_handle) == EFRM_RESOURCE_VI);
++ return (struct vi_resource *) rs;
++}
++static inline struct
++efrm_resource *efrm_from_vi_resource(struct vi_resource *rs)
++{
++ return (struct efrm_resource *)rs;
++}
++
++#define EFAB_VI_RESOURCE_INSTANCE(virs) \
++ EFRM_RESOURCE_INSTANCE(efrm_from_vi_resource(virs)->rs_handle)
++
++#define EFAB_VI_RESOURCE_PRI_ARG(virs) \
++ EFRM_RESOURCE_PRI_ARG(efrm_from_vi_resource(virs)->rs_handle)
++
++extern int
++efrm_vi_resource_alloc(struct efrm_client *client,
++ struct vi_resource *evq_virs,
++ uint16_t vi_flags, int32_t evq_capacity,
++ int32_t txq_capacity, int32_t rxq_capacity,
++ uint8_t tx_q_tag, uint8_t rx_q_tag,
++ struct vi_resource **virs_in_out,
++ uint32_t *out_io_mmap_bytes,
++ uint32_t *out_mem_mmap_bytes,
++ uint32_t *out_txq_capacity,
++ uint32_t *out_rxq_capacity);
++
++extern void efrm_vi_resource_free(struct vi_resource *);
++extern void efrm_vi_resource_release(struct vi_resource *);
++
++
++/*--------------------------------------------------------------------
++ *
++ * eventq handling
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Reset an event queue and clear any associated timers */
++extern void efrm_eventq_reset(struct vi_resource *virs);
++
++/*! Register a kernel-level handler for the event queue. This function is
++ * called whenever a timer expires, or whenever the event queue is woken
++ * but no thread is blocked on it.
++ *
++ * This function returns -EBUSY if a callback is already installed.
++ *
++ * \param rs Event-queue resource
++ * \param handler Callback-handler
++ * \param arg Argument to pass to callback-handler
++ * \return Status code
++ */
++extern int
++efrm_eventq_register_callback(struct vi_resource *rs,
++ void (*handler)(void *arg, int is_timeout,
++ struct efhw_nic *nic),
++ void *arg);
++
++/*! Kill the kernel-level callback.
++ *
++ * This function stops the timer from running and unregisters the callback
++ * function. It waits for any running timeout handlers to complete before
++ * returning.
++ *
++ * \param rs Event-queue resource
++ * \return Nothing
++ */
++extern void efrm_eventq_kill_callback(struct vi_resource *rs);
++
++/*! Ask the NIC to generate a wakeup when an event is next delivered. */
++extern void efrm_eventq_request_wakeup(struct vi_resource *rs,
++ unsigned current_ptr);
++
++/*! Register a kernel-level handler for flush completions.
++ * \TODO Currently, it is unsafe to install a callback more than once.
++ *
++ * \param rs VI resource being flushed.
++ * \param handler Callback handler function.
++ * \param arg Argument to be passed to handler.
++ */
++extern void
++efrm_vi_register_flush_callback(struct vi_resource *rs,
++ void (*handler)(void *),
++ void *arg);
++
++int efrm_vi_resource_flush_retry(struct vi_resource *virs);
++
++/*! Comment? */
++extern int efrm_pt_flush(struct vi_resource *);
++
++/*! Comment? */
++extern int efrm_pt_pace(struct vi_resource *, unsigned int val);
++
++uint32_t efrm_vi_rm_txq_bytes(struct vi_resource *virs
++ /*,struct efhw_nic *nic */);
++uint32_t efrm_vi_rm_rxq_bytes(struct vi_resource *virs
++ /*,struct efhw_nic *nic */);
++uint32_t efrm_vi_rm_evq_bytes(struct vi_resource *virs
++ /*,struct efhw_nic *nic */);
++
++
++/* Fill [out_vi_data] with information required to allow a VI to be init'd.
++ * [out_vi_data] must ref at least VI_MAPPINGS_SIZE bytes.
++ */
++extern void efrm_vi_resource_mappings(struct vi_resource *, void *out_vi_data);
++
++
++#endif /* __CI_EFRM_VI_RESOURCE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/vi_resource_manager.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/vi_resource_manager.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,155 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains type definitions for VI resource. These types
++ * may be used outside of the SFC resource driver, but such use is not
++ * recommended.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_EFAB_VI_RESOURCE_MANAGER_H__
++#define __CI_DRIVER_EFAB_VI_RESOURCE_MANAGER_H__
++
++#include <ci/efhw/common.h>
++#include <ci/efrm/vi_resource.h>
++
++
++#define EFRM_VI_RM_DMA_QUEUE_COUNT 2
++#define EFRM_VI_RM_DMA_QUEUE_TX 0
++#define EFRM_VI_RM_DMA_QUEUE_RX 1
++
++/** Numbers of bits which can be set in the evq_state member of
++ * vi_resource_evq_info. */
++enum {
++ /** This bit is set if a wakeup has been requested on the NIC. */
++ VI_RESOURCE_EVQ_STATE_WAKEUP_PENDING,
++ /** This bit is set if the wakeup is valid for the sleeping
++ * process. */
++ VI_RESOURCE_EVQ_STATE_CALLBACK_REGISTERED,
++ /** This bit is set if a wakeup or timeout event is currently being
++ * processed. */
++ VI_RESOURCE_EVQ_STATE_BUSY,
++};
++#define VI_RESOURCE_EVQ_STATE(X) \
++ (((int32_t)1) << (VI_RESOURCE_EVQ_STATE_##X))
++
++
++/*! Global information for the VI resource manager. */
++struct vi_resource_manager {
++ struct efrm_resource_manager rm;
++
++ struct kfifo *instances_with_timer;
++ int with_timer_base;
++ int with_timer_limit;
++ struct kfifo *instances_with_interrupt;
++ int with_interrupt_base;
++ int with_interrupt_limit;
++
++ bool iscsi_dmaq_instance_is_free;
++
++ /* We keep VI resources which need flushing on these lists. The VI
++ * is put on the outstanding list when the flush request is issued
++ * to the hardware and removed when the flush event arrives. The
++ * hardware can only handle a limited number of RX flush requests at
++ * once, so VIs are placed in the waiting list until the flush can
++ * be issued. Flushes can be requested by the client or internally
++ * by the VI resource manager. In the former case, the reference
++ * count must be non-zero for the duration of the flush and in the
++ * later case, the reference count must be zero. */
++ struct list_head rx_flush_waiting_list;
++ struct list_head rx_flush_outstanding_list;
++ struct list_head tx_flush_outstanding_list;
++ int rx_flush_outstanding_count;
++
++ /* once the flush has happened we push the close into the work queue
++ * so its OK on Windows to free the resources (Bug 3469). Resources
++ * on this list have zero reference count.
++ */
++ struct list_head close_pending;
++ struct work_struct work_item;
++ struct workqueue_struct *workqueue;
++};
++
++struct vi_resource_nic_info {
++ struct eventq_resource_hardware evq_pages;
++ struct efhw_iopages dmaq_pages[EFRM_VI_RM_DMA_QUEUE_COUNT];
++};
++
++struct vi_resource {
++ /* Some macros make the assumption that the struct efrm_resource is
++ * the first member of a struct vi_resource. */
++ struct efrm_resource rs;
++ atomic_t evq_refs; /*!< Number of users of the event queue. */
++
++ uint32_t bar_mmap_bytes;
++ uint32_t mem_mmap_bytes;
++
++ int32_t evq_capacity;
++ int32_t dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_COUNT];
++
++ uint8_t dmaq_tag[EFRM_VI_RM_DMA_QUEUE_COUNT];
++ uint16_t flags;
++
++ /* we keep PT endpoints that have been destroyed on a list
++ * until we have seen their TX and RX DMAQs flush complete
++ * (see Bug 1217)
++ */
++ struct list_head rx_flush_link;
++ struct list_head tx_flush_link;
++ int rx_flushing;
++ int rx_flush_outstanding;
++ int tx_flushing;
++ uint64_t flush_time;
++ int flush_count;
++
++ void (*flush_callback_fn)(void *);
++ void *flush_callback_arg;
++
++ void (*evq_callback_fn) (void *arg, int is_timeout,
++ struct efhw_nic *nic);
++ void *evq_callback_arg;
++
++ struct vi_resource *evq_virs; /*!< EVQ for DMA queues */
++
++ struct efhw_buffer_table_allocation
++ dmaq_buf_tbl_alloc[EFRM_VI_RM_DMA_QUEUE_COUNT];
++
++ struct vi_resource_nic_info nic_info;
++};
++
++#undef vi_resource
++#define vi_resource(rs1) container_of((rs1), struct vi_resource, rs)
++
++static inline dma_addr_t
++efrm_eventq_dma_addr(struct vi_resource *virs)
++{
++ struct eventq_resource_hardware *hw;
++ hw = &virs->nic_info.evq_pages;
++ return efhw_iopages_dma_addr(&hw->iobuff) + hw->iobuff_off;
++}
++
++#endif /* __CI_DRIVER_EFAB_VI_RESOURCE_MANAGER_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/vi_resource_private.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/ci/efrm/vi_resource_private.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,65 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains private API for VI resource. The API is not designed
++ * to be used outside of the SFC resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_VI_RESOURCE_PRIVATE_H__
++#define __CI_EFRM_VI_RESOURCE_PRIVATE_H__
++
++#include <ci/efhw/common.h>
++#include <ci/efrm/vi_resource_manager.h>
++
++extern struct vi_resource_manager *efrm_vi_manager;
++
++/*************************************************************************/
++
++extern void efrm_vi_rm_delayed_free(struct work_struct *data);
++
++extern void efrm_vi_rm_salvage_flushed_vis(void);
++
++void efrm_vi_rm_free_flushed_resource(struct vi_resource *virs);
++
++void efrm_vi_rm_init_dmaq(struct vi_resource *virs, int queue_index,
++ struct efhw_nic *nic);
++
++/*! Wakeup handler */
++extern void efrm_handle_wakeup_event(struct efhw_nic *nic, unsigned id);
++
++/*! Timeout handler */
++extern void efrm_handle_timeout_event(struct efhw_nic *nic, unsigned id);
++
++/*! DMA flush handler */
++extern void efrm_handle_dmaq_flushed(struct efhw_nic *nic, unsigned id,
++ int rx_flush);
++
++/*! SRAM update handler */
++extern void efrm_handle_sram_event(struct efhw_nic *nic);
++
++#endif /* __CI_EFRM_VI_RESOURCE_PRIVATE_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/driver_object.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/driver_object.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,328 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains support for the global driver variables.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/nic_table.h>
++#include <ci/efrm/resource.h>
++#include <ci/efrm/debug.h>
++#include <ci/efrm/efrm_client.h>
++#include <ci/efrm/efrm_nic.h>
++#include "efrm_internal.h"
++
++/* We use #define rather than static inline here so that the Windows
++ * "prefast" compiler can see its own locking primitive when these
++ * two function are used (and then perform extra checking where they
++ * are used)
++ *
++ * Both macros operate on an irq_flags_t
++*/
++
++#define efrm_driver_lock(irqlock_state) \
++ spin_lock_irqsave(&efrm_nic_tablep->lock, irqlock_state)
++
++#define efrm_driver_unlock(irqlock_state) \
++ spin_unlock_irqrestore(&efrm_nic_tablep->lock, \
++ irqlock_state);
++
++/* These routines are all methods on the architecturally singleton
++ global variables: efrm_nic_table, efrm_rm_table.
++
++ I hope we never find a driver model that does not allow global
++ structure variables :) (but that would break almost every driver I've
++ ever seen).
++*/
++
++/*! Exported driver state */
++static struct efrm_nic_table efrm_nic_table;
++struct efrm_nic_table *efrm_nic_tablep;
++EXPORT_SYMBOL(efrm_nic_tablep);
++
++
++/* Internal table with resource managers.
++ * We'd like to not export it, but we are still using efrm_rm_table
++ * in the char driver. So, it is declared in the private header with
++ * a purpose. */
++struct efrm_resource_manager *efrm_rm_table[EFRM_RESOURCE_NUM];
++EXPORT_SYMBOL(efrm_rm_table);
++
++
++/* List of registered nics. */
++static LIST_HEAD(efrm_nics);
++
++
++void efrm_driver_ctor(void)
++{
++ efrm_nic_tablep = &efrm_nic_table;
++ spin_lock_init(&efrm_nic_tablep->lock);
++ EFRM_TRACE("%s: driver created", __func__);
++}
++
++void efrm_driver_dtor(void)
++{
++ EFRM_ASSERT(!efrm_nic_table_held());
++
++ spin_lock_destroy(&efrm_nic_tablep->lock);
++ memset(&efrm_nic_table, 0, sizeof(efrm_nic_table));
++ memset(&efrm_rm_table, 0, sizeof(efrm_rm_table));
++ EFRM_TRACE("%s: driver deleted", __func__);
++}
++
++int efrm_driver_register_nic(struct efrm_nic *rnic, int nic_index,
++ int ifindex)
++{
++ struct efhw_nic *nic = &rnic->efhw_nic;
++ struct efrm_nic_per_vi *vis;
++ int max_vis, rc = 0;
++ irq_flags_t lock_flags;
++
++ EFRM_ASSERT(nic_index >= 0);
++ EFRM_ASSERT(ifindex >= 0);
++
++ max_vis = 4096; /* TODO: Get runtime value. */
++ vis = vmalloc(max_vis * sizeof(rnic->vis[0]));
++ if (vis == NULL) {
++ EFRM_ERR("%s: Out of memory", __func__);
++ return -ENOMEM;
++ }
++
++ efrm_driver_lock(lock_flags);
++
++ if (efrm_nic_table_held()) {
++ EFRM_ERR("%s: driver object is in use", __func__);
++ rc = -EBUSY;
++ goto done;
++ }
++
++ if (efrm_nic_tablep->nic_count == EFHW_MAX_NR_DEVS) {
++ EFRM_ERR("%s: filled up NIC table size %d", __func__,
++ EFHW_MAX_NR_DEVS);
++ rc = -E2BIG;
++ goto done;
++ }
++
++ rnic->vis = vis;
++
++ EFRM_ASSERT(efrm_nic_tablep->nic[nic_index] == NULL);
++ efrm_nic_tablep->nic[nic_index] = nic;
++ nic->index = nic_index;
++ nic->ifindex = ifindex;
++
++ if (efrm_nic_tablep->a_nic == NULL)
++ efrm_nic_tablep->a_nic = nic;
++
++ efrm_nic_tablep->nic_count++;
++
++ INIT_LIST_HEAD(&rnic->clients);
++ list_add(&rnic->link, &efrm_nics);
++
++ efrm_driver_unlock(lock_flags);
++ return 0;
++
++done:
++ efrm_driver_unlock(lock_flags);
++ vfree(vis);
++ return rc;
++}
++
++int efrm_driver_unregister_nic(struct efrm_nic *rnic)
++{
++ struct efhw_nic *nic = &rnic->efhw_nic;
++ int rc = 0;
++ int nic_index = nic->index;
++ irq_flags_t lock_flags;
++
++ EFRM_ASSERT(nic_index >= 0);
++
++ efrm_driver_lock(lock_flags);
++
++ if (efrm_nic_table_held()) {
++ EFRM_ERR("%s: driver object is in use", __func__);
++ rc = -EBUSY;
++ goto done;
++ }
++ if (!list_empty(&rnic->clients)) {
++ EFRM_ERR("%s: nic has active clients", __func__);
++ rc = -EBUSY;
++ goto done;
++ }
++
++ EFRM_ASSERT(efrm_nic_tablep->nic[nic_index] == nic);
++ EFRM_ASSERT(list_empty(&rnic->clients));
++
++ list_del(&rnic->link);
++
++ nic->index = -1;
++ efrm_nic_tablep->nic[nic_index] = NULL;
++
++ --efrm_nic_tablep->nic_count;
++
++ if (efrm_nic_tablep->a_nic == nic) {
++ if (efrm_nic_tablep->nic_count == 0) {
++ efrm_nic_tablep->a_nic = NULL;
++ } else {
++ for (nic_index = 0; nic_index < EFHW_MAX_NR_DEVS;
++ nic_index++) {
++ if (efrm_nic_tablep->nic[nic_index] != NULL)
++ efrm_nic_tablep->a_nic =
++ efrm_nic_tablep->nic[nic_index];
++ }
++ EFRM_ASSERT(efrm_nic_tablep->a_nic);
++ }
++ }
++
++done:
++ efrm_driver_unlock(lock_flags);
++ return rc;
++}
++
++
++int efrm_nic_pre_reset(struct efhw_nic *nic)
++{
++ struct efrm_nic *rnic = efrm_nic(nic);
++ struct efrm_client *client;
++ struct efrm_resource *rs;
++ struct list_head *client_link;
++ struct list_head *rs_link;
++ irq_flags_t lock_flags;
++
++ spin_lock_irqsave(&efrm_nic_tablep->lock, lock_flags);
++ list_for_each(client_link, &rnic->clients) {
++ client = container_of(client_link, struct efrm_client, link);
++ EFRM_ERR("%s: client %p", __func__, client);
++ if (client->callbacks->pre_reset)
++ client->callbacks->pre_reset(client, client->user_data);
++ list_for_each(rs_link, &client->resources) {
++ rs = container_of(rs_link, struct efrm_resource,
++ rs_client_link);
++ EFRM_ERR("%s: resource %p", __func__, rs);
++ /* TODO: mark rs defunct */
++ }
++ }
++ spin_unlock_irqrestore(&efrm_nic_tablep->lock, lock_flags);
++
++ return 0;
++}
++
++
++int efrm_nic_stop(struct efhw_nic *nic)
++{
++ /* TODO */
++ return 0;
++}
++
++
++int efrm_nic_resume(struct efhw_nic *nic)
++{
++ /* TODO */
++ return 0;
++}
++
++
++static void efrm_client_nullcb(struct efrm_client *client, void *user_data)
++{
++}
++
++static struct efrm_client_callbacks efrm_null_callbacks = {
++ efrm_client_nullcb,
++ efrm_client_nullcb,
++ efrm_client_nullcb
++};
++
++
++int efrm_client_get(int ifindex, struct efrm_client_callbacks *callbacks,
++ void *user_data, struct efrm_client **client_out)
++{
++ struct efrm_nic *n, *rnic = NULL;
++ irq_flags_t lock_flags;
++ struct list_head *link;
++ struct efrm_client *client;
++
++ if (callbacks == NULL)
++ callbacks = &efrm_null_callbacks;
++
++ client = kmalloc(sizeof(*client), GFP_KERNEL);
++ if (client == NULL)
++ return -ENOMEM;
++
++ spin_lock_irqsave(&efrm_nic_tablep->lock, lock_flags);
++ list_for_each(link, &efrm_nics) {
++ n = container_of(link, struct efrm_nic, link);
++ if (n->efhw_nic.ifindex == ifindex || ifindex < 0) {
++ rnic = n;
++ break;
++ }
++ }
++ if (rnic) {
++ client->user_data = user_data;
++ client->callbacks = callbacks;
++ client->nic = &rnic->efhw_nic;
++ client->ref_count = 1;
++ INIT_LIST_HEAD(&client->resources);
++ list_add(&client->link, &rnic->clients);
++ }
++ spin_unlock_irqrestore(&efrm_nic_tablep->lock, lock_flags);
++
++ if (rnic == NULL)
++ return -ENODEV;
++
++ *client_out = client;
++ return 0;
++}
++EXPORT_SYMBOL(efrm_client_get);
++
++
++void efrm_client_put(struct efrm_client *client)
++{
++ irq_flags_t lock_flags;
++
++ EFRM_ASSERT(client->ref_count > 0);
++
++ spin_lock_irqsave(&efrm_nic_tablep->lock, lock_flags);
++ if (--client->ref_count > 0)
++ client = NULL;
++ else
++ list_del(&client->link);
++ spin_unlock_irqrestore(&efrm_nic_tablep->lock, lock_flags);
++ kfree(client);
++}
++EXPORT_SYMBOL(efrm_client_put);
++
++
++struct efhw_nic *efrm_client_get_nic(struct efrm_client *client)
++{
++ return client->nic;
++}
++EXPORT_SYMBOL(efrm_client_get_nic);
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/driverlink_new.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/driverlink_new.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,260 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains driverlink code which interacts with the sfc network
++ * driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include "linux_resource_internal.h"
++#include "driverlink_api.h"
++#include "kernel_compat.h"
++#include <ci/efhw/falcon.h>
++
++#include <linux/rtnetlink.h>
++#include <linux/netdevice.h>
++#include <net/net_namespace.h>
++
++/* The DL driver and associated calls */
++static int efrm_dl_probe(struct efx_dl_device *efrm_dev,
++ const struct net_device *net_dev,
++ const struct efx_dl_device_info *dev_info,
++ const char *silicon_rev);
++
++static void efrm_dl_remove(struct efx_dl_device *efrm_dev);
++
++static void efrm_dl_reset_suspend(struct efx_dl_device *efrm_dev);
++
++static void efrm_dl_reset_resume(struct efx_dl_device *efrm_dev, int ok);
++
++static void efrm_dl_mtu_changed(struct efx_dl_device *, int);
++static void efrm_dl_event_falcon(struct efx_dl_device *efx_dev, void *p_event);
++
++static struct efx_dl_driver efrm_dl_driver = {
++ .name = "resource",
++ .probe = efrm_dl_probe,
++ .remove = efrm_dl_remove,
++ .reset_suspend = efrm_dl_reset_suspend,
++ .reset_resume = efrm_dl_reset_resume
++};
++
++static void
++init_vi_resource_dimensions(struct vi_resource_dimensions *rd,
++ const struct efx_dl_falcon_resources *res)
++{
++ rd->evq_timer_min = res->evq_timer_min;
++ rd->evq_timer_lim = res->evq_timer_lim;
++ rd->evq_int_min = res->evq_int_min;
++ rd->evq_int_lim = res->evq_int_lim;
++ rd->rxq_min = res->rxq_min;
++ rd->rxq_lim = res->rxq_lim;
++ rd->txq_min = res->txq_min;
++ rd->txq_lim = res->txq_lim;
++ EFRM_TRACE
++ ("Using evq_int(%d-%d) evq_timer(%d-%d) RXQ(%d-%d) TXQ(%d-%d)",
++ res->evq_int_min, res->evq_int_lim, res->evq_timer_min,
++ res->evq_timer_lim, res->rxq_min, res->rxq_lim, res->txq_min,
++ res->txq_lim);
++}
++
++static int
++efrm_dl_probe(struct efx_dl_device *efrm_dev,
++ const struct net_device *net_dev,
++ const struct efx_dl_device_info *dev_info,
++ const char *silicon_rev)
++{
++ struct vi_resource_dimensions res_dim;
++ struct efx_dl_falcon_resources *res;
++ struct linux_efhw_nic *lnic;
++ struct pci_dev *dev;
++ struct efhw_nic *nic;
++ unsigned probe_flags = 0;
++ int non_irq_evq;
++ int rc;
++
++ efrm_dev->priv = NULL;
++
++ efx_dl_search_device_info(dev_info, EFX_DL_FALCON_RESOURCES,
++ struct efx_dl_falcon_resources,
++ hdr, res);
++
++ if (res == NULL) {
++ EFRM_ERR("%s: Unable to find falcon driverlink resources",
++ __func__);
++ return -EINVAL;
++ }
++
++ if (res->flags & EFX_DL_FALCON_USE_MSI)
++ probe_flags |= NIC_FLAG_TRY_MSI;
++
++ dev = efrm_dev->pci_dev;
++ if (res->flags & EFX_DL_FALCON_DUAL_FUNC) {
++ unsigned vendor = dev->vendor;
++ EFRM_ASSERT(dev->bus != NULL);
++ dev = NULL;
++
++ while ((dev = pci_get_device(vendor, FALCON_S_DEVID, dev))
++ != NULL) {
++ EFRM_ASSERT(dev->bus != NULL);
++ /* With PCIe (since it's point to point)
++ * the slot ID is usually 0 and
++ * the bus ID changes NIC to NIC, so we really
++ * need to check both. */
++ if (PCI_SLOT(dev->devfn) ==
++ PCI_SLOT(efrm_dev->pci_dev->devfn)
++ && dev->bus->number ==
++ efrm_dev->pci_dev->bus->number)
++ break;
++ }
++ if (dev == NULL) {
++ EFRM_ERR("%s: Unable to find falcon secondary "
++ "PCI device.", __func__);
++ return -ENODEV;
++ }
++ pci_dev_put(dev);
++ }
++
++ init_vi_resource_dimensions(&res_dim, res);
++
++ EFRM_ASSERT(res_dim.evq_timer_lim > res_dim.evq_timer_min);
++ res_dim.evq_timer_lim--;
++ non_irq_evq = res_dim.evq_timer_lim;
++
++ rc = efrm_nic_add(dev, probe_flags, net_dev->dev_addr, &lnic,
++ res->biu_lock,
++ res->buffer_table_min, res->buffer_table_lim,
++ non_irq_evq, &res_dim);
++ if (rc != 0)
++ return rc;
++
++ nic = &lnic->efrm_nic.efhw_nic;
++ nic->mtu = net_dev->mtu + ETH_HLEN;
++ nic->net_driver_dev = efrm_dev;
++ nic->ifindex = net_dev->ifindex;
++#ifdef CONFIG_NET_NS
++ nic->nd_net = net_dev->nd_net;
++#endif
++ efrm_dev->priv = nic;
++
++ /* Register a callback so we're told when MTU changes.
++ * We dynamically allocate efx_dl_callbacks, because
++ * the callbacks that we want depends on the NIC type.
++ */
++ lnic->dl_callbacks =
++ kmalloc(sizeof(struct efx_dl_callbacks), GFP_KERNEL);
++ if (!lnic->dl_callbacks) {
++ EFRM_ERR("Out of memory (%s)", __func__);
++ efrm_nic_del(lnic);
++ return -ENOMEM;
++ }
++ memset(lnic->dl_callbacks, 0, sizeof(*lnic->dl_callbacks));
++ lnic->dl_callbacks->mtu_changed = efrm_dl_mtu_changed;
++
++ if ((res->flags & EFX_DL_FALCON_DUAL_FUNC) == 0) {
++ /* Net driver receives all management events.
++ * Register a callback to receive the ones
++ * we're interested in. */
++ lnic->dl_callbacks->event = efrm_dl_event_falcon;
++ }
++
++ rc = efx_dl_register_callbacks(efrm_dev, lnic->dl_callbacks);
++ if (rc < 0) {
++ EFRM_ERR("%s: efx_dl_register_callbacks failed (%d)",
++ __func__, rc);
++ kfree(lnic->dl_callbacks);
++ efrm_nic_del(lnic);
++ return rc;
++ }
++
++ return 0;
++}
++
++/* When we unregister ourselves on module removal, this function will be
++ * called for all the devices we claimed */
++static void efrm_dl_remove(struct efx_dl_device *efrm_dev)
++{
++ struct efhw_nic *nic = efrm_dev->priv;
++ struct linux_efhw_nic *lnic = linux_efhw_nic(nic);
++ EFRM_TRACE("%s called", __func__);
++ if (lnic->dl_callbacks) {
++ efx_dl_unregister_callbacks(efrm_dev, lnic->dl_callbacks);
++ kfree(lnic->dl_callbacks);
++ }
++ if (efrm_dev->priv)
++ efrm_nic_del(lnic);
++ EFRM_TRACE("%s OK", __func__);
++}
++
++static void efrm_dl_reset_suspend(struct efx_dl_device *efrm_dev)
++{
++ EFRM_NOTICE("%s:", __func__);
++}
++
++static void efrm_dl_reset_resume(struct efx_dl_device *efrm_dev, int ok)
++{
++ EFRM_NOTICE("%s: ok=%d", __func__, ok);
++}
++
++int efrm_driverlink_register(void)
++{
++ EFRM_TRACE("%s:", __func__);
++ return efx_dl_register_driver(&efrm_dl_driver);
++}
++
++void efrm_driverlink_unregister(void)
++{
++ EFRM_TRACE("%s:", __func__);
++ efx_dl_unregister_driver(&efrm_dl_driver);
++}
++
++static void efrm_dl_mtu_changed(struct efx_dl_device *efx_dev, int mtu)
++{
++ struct efhw_nic *nic = efx_dev->priv;
++
++ ASSERT_RTNL(); /* Since we're looking at efx_dl_device::port_net_dev */
++
++ EFRM_TRACE("%s: old=%d new=%d", __func__, nic->mtu, mtu + ETH_HLEN);
++ /* If this happened we must have agreed to it above */
++ nic->mtu = mtu + ETH_HLEN;
++}
++
++static void efrm_dl_event_falcon(struct efx_dl_device *efx_dev, void *p_event)
++{
++ struct efhw_nic *nic = efx_dev->priv;
++ struct linux_efhw_nic *lnic = linux_efhw_nic(nic);
++ efhw_event_t *ev = p_event;
++
++ switch (FALCON_EVENT_CODE(ev)) {
++ case FALCON_EVENT_CODE_CHAR:
++ falcon_handle_char_event(nic, lnic->ev_handlers, ev);
++ break;
++ default:
++ EFRM_WARN("%s: unknown event type=%x", __func__,
++ (unsigned)FALCON_EVENT_CODE(ev));
++ break;
++ }
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/efrm_internal.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/efrm_internal.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,41 @@
++#ifndef __EFRM_INTERNAL_H__
++#define __EFRM_INTERNAL_H__
++
++
++struct filter_resource {
++ struct efrm_resource rs;
++ struct vi_resource *pt;
++ int filter_idx;
++};
++
++#define filter_resource(rs1) container_of((rs1), struct filter_resource, rs)
++
++
++struct efrm_client {
++ void *user_data;
++ struct list_head link;
++ struct efrm_client_callbacks *callbacks;
++ struct efhw_nic *nic;
++ int ref_count;
++ struct list_head resources;
++};
++
++
++extern void efrm_client_add_resource(struct efrm_client *,
++ struct efrm_resource *);
++
++extern int efrm_buffer_table_size(void);
++
++
++static inline void efrm_resource_init(struct efrm_resource *rs,
++ int type, int instance)
++{
++ EFRM_ASSERT(instance >= 0);
++ EFRM_ASSERT(type >= 0 && type < EFRM_RESOURCE_NUM);
++ rs->rs_ref_count = 1;
++ rs->rs_handle.handle = (type << 28u) |
++ (((unsigned)jiffies & 0xfff) << 16) | instance;
++}
++
++
++#endif /* __EFRM_INTERNAL_H__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/efx_vi_shm.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/efx_vi_shm.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,707 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides implementation of EFX VI API, used from Xen
++ * acceleration driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include "linux_resource_internal.h"
++#include <ci/efrm/vi_resource_manager.h>
++#include <ci/driver/resource/efx_vi.h>
++#include <ci/efrm/filter.h>
++#include <ci/efrm/buffer_table.h>
++#include <ci/efrm/efrm_client.h>
++#include <linux/pci.h>
++#include "kernel_compat.h"
++
++#if EFX_VI_STATIC_FILTERS
++struct filter_list_t {
++ struct filter_list_t *next;
++ struct filter_resource *fres;
++};
++#endif
++
++struct efx_vi_state {
++ struct vi_resource *vi_res;
++
++ int ifindex;
++ struct efrm_client *efrm_client;
++ struct efhw_nic *nic;
++
++ void (*callback_fn)(void *arg, int is_timeout);
++ void *callback_arg;
++
++ struct completion flush_completion;
++
++#if EFX_VI_STATIC_FILTERS
++ struct filter_list_t fres[EFX_VI_STATIC_FILTERS];
++ struct filter_list_t *free_fres;
++ struct filter_list_t *used_fres;
++#endif
++};
++
++static void efx_vi_flush_complete(void *state_void)
++{
++ struct efx_vi_state *state = (struct efx_vi_state *)state_void;
++
++ complete(&state->flush_completion);
++}
++
++static inline int alloc_ep(struct efx_vi_state *state)
++{
++ int rc;
++
++ rc = efrm_vi_resource_alloc(state->efrm_client, NULL, EFHW_VI_JUMBO_EN,
++ efx_vi_eventq_size,
++ FALCON_DMA_Q_DEFAULT_TX_SIZE,
++ FALCON_DMA_Q_DEFAULT_RX_SIZE,
++ 0, 0, &state->vi_res, NULL, NULL, NULL,
++ NULL);
++ if (rc < 0) {
++ EFRM_ERR("%s: ERROR efrm_vi_resource_alloc error %d",
++ __func__, rc);
++ return rc;
++ }
++
++ efrm_vi_register_flush_callback(state->vi_res, &efx_vi_flush_complete,
++ (void *)state);
++
++ return 0;
++}
++
++static int free_ep(struct efx_vi_state *efx_state)
++{
++ efrm_vi_resource_release(efx_state->vi_res);
++
++ return 0;
++}
++
++#if EFX_VI_STATIC_FILTERS
++static int efx_vi_alloc_static_filters(struct efx_vi_state *efx_state)
++{
++ int i;
++ int rc;
++
++ efx_state->free_fres = efx_state->used_fres = NULL;
++
++ for (i = 0; i < EFX_VI_STATIC_FILTERS; i++) {
++ rc = efrm_filter_resource_alloc(efx_state->vi_res,
++ &efx_state->fres[i].fres);
++ if (rc < 0) {
++ EFRM_ERR("%s: efrm_filter_resource_alloc failed: %d",
++ __func__, rc);
++ while (i > 0) {
++ i--;
++ efrm_filter_resource_release(efx_state->
++ fres[i].fres);
++ }
++ efx_state->free_fres = NULL;
++ return rc;
++ }
++ efx_state->fres[i].next = efx_state->free_fres;
++ efx_state->free_fres = &efx_state->fres[i];
++ }
++
++ return 0;
++}
++#endif
++
++int efx_vi_alloc(struct efx_vi_state **vih_out, int ifindex)
++{
++ struct efx_vi_state *efx_state;
++ int rc;
++
++ efx_state = kmalloc(sizeof(struct efx_vi_state), GFP_KERNEL);
++
++ if (!efx_state) {
++ EFRM_ERR("%s: failed to allocate memory for efx_vi_state",
++ __func__);
++ rc = -ENOMEM;
++ goto fail;
++ }
++
++ efx_state->ifindex = ifindex;
++ rc = efrm_client_get(ifindex, NULL, NULL, &efx_state->efrm_client);
++ if (rc < 0) {
++ EFRM_ERR("%s: efrm_client_get(%d) failed: %d", __func__,
++ ifindex, rc);
++ rc = -ENODEV;
++ goto fail_no_ifindex;
++ }
++ efx_state->nic = efrm_client_get_nic(efx_state->efrm_client);
++
++ init_completion(&efx_state->flush_completion);
++
++ /* basically allocate_pt_endpoint() */
++ rc = alloc_ep(efx_state);
++ if (rc) {
++ EFRM_ERR("%s: alloc_ep failed: %d", __func__, rc);
++ goto fail_no_pt;
++ }
++#if EFX_VI_STATIC_FILTERS
++ /* Statically allocate a set of filter resources - removes the
++ restriction on not being able to use efx_vi_filter() from
++ in_atomic() */
++ rc = efx_vi_alloc_static_filters(efx_state);
++ if (rc)
++ goto fail_no_filters;
++#endif
++
++ *vih_out = efx_state;
++
++ return 0;
++#if EFX_VI_STATIC_FILTERS
++fail_no_filters:
++ free_ep(efx_state);
++#endif
++fail_no_pt:
++ efrm_client_put(efx_state->efrm_client);
++fail_no_ifindex:
++ kfree(efx_state);
++fail:
++ return rc;
++}
++EXPORT_SYMBOL(efx_vi_alloc);
++
++void efx_vi_free(struct efx_vi_state *vih)
++{
++ struct efx_vi_state *efx_state = vih;
++
++ /* TODO flush dma channels, init dma queues?. See ef_free_vnic() */
++#if EFX_VI_STATIC_FILTERS
++ int i;
++
++ for (i = 0; i < EFX_VI_STATIC_FILTERS; i++)
++ efrm_filter_resource_release(efx_state->fres[i].fres);
++#endif
++
++ if (efx_state->vi_res)
++ free_ep(efx_state);
++
++ efrm_client_put(efx_state->efrm_client);
++
++ kfree(efx_state);
++}
++EXPORT_SYMBOL(efx_vi_free);
++
++void efx_vi_reset(struct efx_vi_state *vih)
++{
++ struct efx_vi_state *efx_state = vih;
++
++ efrm_pt_flush(efx_state->vi_res);
++
++ while (wait_for_completion_timeout(&efx_state->flush_completion, HZ)
++ == 0)
++ efrm_vi_resource_flush_retry(efx_state->vi_res);
++
++ /* Bosch the eventq */
++ efrm_eventq_reset(efx_state->vi_res);
++ return;
++}
++EXPORT_SYMBOL(efx_vi_reset);
++
++static void
++efx_vi_eventq_callback(void *context, int is_timeout, struct efhw_nic *nic)
++{
++ struct efx_vi_state *efx_state = (struct efx_vi_state *)context;
++
++ EFRM_ASSERT(efx_state->callback_fn);
++
++ return efx_state->callback_fn(efx_state->callback_arg, is_timeout);
++}
++
++int
++efx_vi_eventq_register_callback(struct efx_vi_state *vih,
++ void (*callback)(void *context, int is_timeout),
++ void *context)
++{
++ struct efx_vi_state *efx_state = vih;
++
++ efx_state->callback_fn = callback;
++ efx_state->callback_arg = context;
++
++ /* Register the eventq timeout event callback */
++ efrm_eventq_register_callback(efx_state->vi_res,
++ efx_vi_eventq_callback, efx_state);
++
++ return 0;
++}
++EXPORT_SYMBOL(efx_vi_eventq_register_callback);
++
++int efx_vi_eventq_kill_callback(struct efx_vi_state *vih)
++{
++ struct efx_vi_state *efx_state = vih;
++
++ if (efx_state->vi_res->evq_callback_fn)
++ efrm_eventq_kill_callback(efx_state->vi_res);
++
++ efx_state->callback_fn = NULL;
++ efx_state->callback_arg = NULL;
++
++ return 0;
++}
++EXPORT_SYMBOL(efx_vi_eventq_kill_callback);
++
++struct efx_vi_dma_map_state {
++ struct efhw_buffer_table_allocation bt_handle;
++ int n_pages;
++ dma_addr_t *dma_addrs;
++};
++
++int
++efx_vi_dma_map_pages(struct efx_vi_state *vih, struct page **pages,
++ int n_pages, struct efx_vi_dma_map_state **dmh_out)
++{
++ struct efx_vi_state *efx_state = vih;
++ int order = fls(n_pages - 1), rc, i, evq_id;
++ dma_addr_t dma_addr;
++ struct efx_vi_dma_map_state *dm_state;
++
++ if (n_pages != (1 << order)) {
++ EFRM_WARN("%s: Can only allocate buffers in power of 2 "
++ "sizes (not %d)", __func__, n_pages);
++ return -EINVAL;
++ }
++
++ dm_state = kmalloc(sizeof(struct efx_vi_dma_map_state), GFP_KERNEL);
++ if (!dm_state)
++ return -ENOMEM;
++
++ dm_state->dma_addrs = kmalloc(sizeof(dma_addr_t) * n_pages,
++ GFP_KERNEL);
++ if (!dm_state->dma_addrs) {
++ kfree(dm_state);
++ return -ENOMEM;
++ }
++
++ rc = efrm_buffer_table_alloc(order, &dm_state->bt_handle);
++ if (rc < 0) {
++ kfree(dm_state->dma_addrs);
++ kfree(dm_state);
++ return rc;
++ }
++
++ evq_id = EFRM_RESOURCE_INSTANCE(efx_state->vi_res->rs.rs_handle);
++ for (i = 0; i < n_pages; i++) {
++ /* TODO do we need to get_page() here ? */
++
++ dma_addr = pci_map_page(linux_efhw_nic(efx_state->nic)->
++ pci_dev, pages[i], 0, PAGE_SIZE,
++ PCI_DMA_TODEVICE);
++
++ efrm_buffer_table_set(&dm_state->bt_handle, efx_state->nic,
++ i, dma_addr, evq_id);
++
++ dm_state->dma_addrs[i] = dma_addr;
++
++ /* Would be nice to not have to call commit each time, but
++ * comment says there are hardware restrictions on how often
++ * you can go without it, so do this to be safe */
++ efrm_buffer_table_commit();
++ }
++
++ dm_state->n_pages = n_pages;
++
++ *dmh_out = dm_state;
++
++ return 0;
++}
++EXPORT_SYMBOL(efx_vi_dma_map_pages);
++
++/* Function needed as Xen can't get pages for grants in dom0, but can
++ get dma address */
++int
++efx_vi_dma_map_addrs(struct efx_vi_state *vih,
++ unsigned long long *bus_dev_addrs,
++ int n_pages, struct efx_vi_dma_map_state **dmh_out)
++{
++ struct efx_vi_state *efx_state = vih;
++ int order = fls(n_pages - 1), rc, i, evq_id;
++ dma_addr_t dma_addr;
++ struct efx_vi_dma_map_state *dm_state;
++
++ if (n_pages != (1 << order)) {
++ EFRM_WARN("%s: Can only allocate buffers in power of 2 "
++ "sizes (not %d)", __func__, n_pages);
++ return -EINVAL;
++ }
++
++ dm_state = kmalloc(sizeof(struct efx_vi_dma_map_state), GFP_KERNEL);
++ if (!dm_state)
++ return -ENOMEM;
++
++ dm_state->dma_addrs = kmalloc(sizeof(dma_addr_t) * n_pages,
++ GFP_KERNEL);
++ if (!dm_state->dma_addrs) {
++ kfree(dm_state);
++ return -ENOMEM;
++ }
++
++ rc = efrm_buffer_table_alloc(order, &dm_state->bt_handle);
++ if (rc < 0) {
++ kfree(dm_state->dma_addrs);
++ kfree(dm_state);
++ return rc;
++ }
++
++ evq_id = EFRM_RESOURCE_INSTANCE(efx_state->vi_res->rs.rs_handle);
++#if 0
++ EFRM_WARN("%s: mapping %d pages to evq %d, bt_ids %d-%d\n",
++ __func__, n_pages, evq_id,
++ dm_state->bt_handle.base,
++ dm_state->bt_handle.base + n_pages);
++#endif
++ for (i = 0; i < n_pages; i++) {
++
++ dma_addr = (dma_addr_t)bus_dev_addrs[i];
++
++ efrm_buffer_table_set(&dm_state->bt_handle, efx_state->nic,
++ i, dma_addr, evq_id);
++
++ dm_state->dma_addrs[i] = dma_addr;
++
++ /* Would be nice to not have to call commit each time, but
++ * comment says there are hardware restrictions on how often
++ * you can go without it, so do this to be safe */
++ efrm_buffer_table_commit();
++ }
++
++ dm_state->n_pages = n_pages;
++
++ *dmh_out = dm_state;
++
++ return 0;
++}
++EXPORT_SYMBOL(efx_vi_dma_map_addrs);
++
++void
++efx_vi_dma_unmap_pages(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh)
++{
++ struct efx_vi_state *efx_state = vih;
++ struct efx_vi_dma_map_state *dm_state =
++ (struct efx_vi_dma_map_state *)dmh;
++ int i;
++
++ efrm_buffer_table_free(&dm_state->bt_handle);
++
++ for (i = 0; i < dm_state->n_pages; ++i)
++ pci_unmap_page(linux_efhw_nic(efx_state->nic)->pci_dev,
++ dm_state->dma_addrs[i], PAGE_SIZE,
++ PCI_DMA_TODEVICE);
++
++ kfree(dm_state->dma_addrs);
++ kfree(dm_state);
++
++ return;
++}
++EXPORT_SYMBOL(efx_vi_dma_unmap_pages);
++
++void
++efx_vi_dma_unmap_addrs(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh)
++{
++ struct efx_vi_dma_map_state *dm_state =
++ (struct efx_vi_dma_map_state *)dmh;
++
++ efrm_buffer_table_free(&dm_state->bt_handle);
++
++ kfree(dm_state->dma_addrs);
++ kfree(dm_state);
++
++ return;
++}
++EXPORT_SYMBOL(efx_vi_dma_unmap_addrs);
++
++unsigned
++efx_vi_dma_get_map_addr(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh)
++{
++ struct efx_vi_dma_map_state *dm_state =
++ (struct efx_vi_dma_map_state *)dmh;
++
++ return EFHW_BUFFER_ADDR(dm_state->bt_handle.base, 0);
++}
++EXPORT_SYMBOL(efx_vi_dma_get_map_addr);
++
++#if EFX_VI_STATIC_FILTERS
++static int
++get_filter(struct efx_vi_state *efx_state,
++ efrm_resource_handle_t pthandle, struct filter_resource **fres_out)
++{
++ struct filter_list_t *flist;
++ if (efx_state->free_fres == NULL)
++ return -ENOMEM;
++ else {
++ flist = efx_state->free_fres;
++ efx_state->free_fres = flist->next;
++ flist->next = efx_state->used_fres;
++ efx_state->used_fres = flist;
++ *fres_out = flist->fres;
++ return 0;
++ }
++}
++#endif
++
++static void
++release_filter(struct efx_vi_state *efx_state, struct filter_resource *fres)
++{
++#if EFX_VI_STATIC_FILTERS
++ struct filter_list_t *flist = efx_state->used_fres, *prev = NULL;
++ while (flist) {
++ if (flist->fres == fres) {
++ if (prev)
++ prev->next = flist->next;
++ else
++ efx_state->used_fres = flist->next;
++ flist->next = efx_state->free_fres;
++ efx_state->free_fres = flist;
++ return;
++ }
++ prev = flist;
++ flist = flist->next;
++ }
++ EFRM_ERR("%s: couldn't find filter", __func__);
++#else
++ return efrm_filter_resource_release(fres);
++#endif
++}
++
++int
++efx_vi_filter(struct efx_vi_state *vih, int protocol,
++ unsigned ip_addr_be32, int port_le16,
++ struct filter_resource_t **fh_out)
++{
++ struct efx_vi_state *efx_state = vih;
++ struct filter_resource *frs;
++ int rc;
++
++#if EFX_VI_STATIC_FILTERS
++ rc = get_filter(efx_state, efx_state->vi_res->rs.rs_handle, &frs);
++#else
++ rc = efrm_filter_resource_alloc(efx_state->vi_res, &frs);
++#endif
++ if (rc < 0)
++ return rc;
++
++ /* Add the hardware filter. We pass in the source port and address
++ * as 0 (wildcard) to minimise the number of filters needed. */
++ if (protocol == IPPROTO_TCP) {
++ rc = efrm_filter_resource_tcp_set(frs, 0, 0, ip_addr_be32,
++ port_le16);
++ } else {
++ rc = efrm_filter_resource_udp_set(frs, 0, 0, ip_addr_be32,
++ port_le16);
++ }
++
++ *fh_out = (struct filter_resource_t *)frs;
++
++ return rc;
++}
++EXPORT_SYMBOL(efx_vi_filter);
++
++int
++efx_vi_filter_stop(struct efx_vi_state *vih, struct filter_resource_t *fh)
++{
++ struct efx_vi_state *efx_state = vih;
++ struct filter_resource *frs = (struct filter_resource *)fh;
++ int rc;
++
++ rc = efrm_filter_resource_clear(frs);
++ release_filter(efx_state, frs);
++
++ return rc;
++}
++EXPORT_SYMBOL(efx_vi_filter_stop);
++
++int
++efx_vi_hw_resource_get_virt(struct efx_vi_state *vih,
++ struct efx_vi_hw_resource_metadata *mdata,
++ struct efx_vi_hw_resource *hw_res_array,
++ int *length)
++{
++ EFRM_NOTICE("%s: TODO!", __func__);
++
++ return 0;
++}
++EXPORT_SYMBOL(efx_vi_hw_resource_get_virt);
++
++int
++efx_vi_hw_resource_get_phys(struct efx_vi_state *vih,
++ struct efx_vi_hw_resource_metadata *mdata,
++ struct efx_vi_hw_resource *hw_res_array,
++ int *length)
++{
++ struct efx_vi_state *efx_state = vih;
++ struct linux_efhw_nic *lnic = linux_efhw_nic(efx_state->nic);
++ unsigned long phys = lnic->ctr_ap_pci_addr;
++ struct efrm_resource *ep_res = &efx_state->vi_res->rs;
++ unsigned ep_mmap_bytes;
++ int i;
++
++ if (*length < EFX_VI_HW_RESOURCE_MAXSIZE)
++ return -EINVAL;
++
++ mdata->nic_arch = efx_state->nic->devtype.arch;
++ mdata->nic_variant = efx_state->nic->devtype.variant;
++ mdata->nic_revision = efx_state->nic->devtype.revision;
++
++ mdata->evq_order =
++ efx_state->vi_res->nic_info.evq_pages.iobuff.order;
++ mdata->evq_offs = efx_state->vi_res->nic_info.evq_pages.iobuff_off;
++ mdata->evq_capacity = efx_vi_eventq_size;
++ mdata->instance = EFRM_RESOURCE_INSTANCE(ep_res->rs_handle);
++ mdata->rx_capacity = FALCON_DMA_Q_DEFAULT_RX_SIZE;
++ mdata->tx_capacity = FALCON_DMA_Q_DEFAULT_TX_SIZE;
++
++ ep_mmap_bytes = FALCON_DMA_Q_DEFAULT_MMAP;
++ EFRM_ASSERT(ep_mmap_bytes == PAGE_SIZE * 2);
++
++#ifndef NDEBUG
++ {
++ /* Sanity about doorbells */
++ unsigned long tx_dma_page_addr, rx_dma_page_addr;
++
++ /* get rx doorbell address */
++ rx_dma_page_addr =
++ phys + falcon_rx_dma_page_addr(mdata->instance);
++ /* get tx doorbell address */
++ tx_dma_page_addr =
++ phys + falcon_tx_dma_page_addr(mdata->instance);
++
++ /* Check the lower bits of the TX doorbell will be
++ * consistent. */
++ EFRM_ASSERT((TX_DESC_UPD_REG_PAGE4_OFST &
++ FALCON_DMA_PAGE_MASK) ==
++ (TX_DESC_UPD_REG_PAGE123K_OFST &
++ FALCON_DMA_PAGE_MASK));
++
++ /* Check the lower bits of the RX doorbell will be
++ * consistent. */
++ EFRM_ASSERT((RX_DESC_UPD_REG_PAGE4_OFST &
++ FALCON_DMA_PAGE_MASK) ==
++ (RX_DESC_UPD_REG_PAGE123K_OFST &
++ FALCON_DMA_PAGE_MASK));
++
++ /* Check that the doorbells will be in the same page. */
++ EFRM_ASSERT((TX_DESC_UPD_REG_PAGE4_OFST & PAGE_MASK) ==
++ (RX_DESC_UPD_REG_PAGE4_OFST & PAGE_MASK));
++
++ /* Check that the doorbells are in the same page. */
++ EFRM_ASSERT((tx_dma_page_addr & PAGE_MASK) ==
++ (rx_dma_page_addr & PAGE_MASK));
++
++ /* Check that the TX doorbell offset is correct. */
++ EFRM_ASSERT((TX_DESC_UPD_REG_PAGE4_OFST & ~PAGE_MASK) ==
++ (tx_dma_page_addr & ~PAGE_MASK));
++
++ /* Check that the RX doorbell offset is correct. */
++ EFRM_ASSERT((RX_DESC_UPD_REG_PAGE4_OFST & ~PAGE_MASK) ==
++ (rx_dma_page_addr & ~PAGE_MASK));
++ }
++#endif
++
++ i = 0;
++ hw_res_array[i].type = EFX_VI_HW_RESOURCE_TXDMAQ;
++ hw_res_array[i].mem_type = EFX_VI_HW_RESOURCE_PERIPHERAL;
++ hw_res_array[i].more_to_follow = 0;
++ hw_res_array[i].length = PAGE_SIZE;
++ hw_res_array[i].address =
++ (unsigned long)efx_state->vi_res->nic_info.
++ dmaq_pages[EFRM_VI_RM_DMA_QUEUE_TX].kva;
++
++ i++;
++ hw_res_array[i].type = EFX_VI_HW_RESOURCE_RXDMAQ;
++ hw_res_array[i].mem_type = EFX_VI_HW_RESOURCE_PERIPHERAL;
++ hw_res_array[i].more_to_follow = 0;
++ hw_res_array[i].length = PAGE_SIZE;
++ hw_res_array[i].address =
++ (unsigned long)efx_state->vi_res->nic_info.
++ dmaq_pages[EFRM_VI_RM_DMA_QUEUE_RX].kva;
++
++ i++;
++ hw_res_array[i].type = EFX_VI_HW_RESOURCE_EVQTIMER;
++ hw_res_array[i].mem_type = EFX_VI_HW_RESOURCE_PERIPHERAL;
++ hw_res_array[i].more_to_follow = 0;
++ hw_res_array[i].length = PAGE_SIZE;
++ hw_res_array[i].address =
++ (unsigned long)phys + falcon_timer_page_addr(mdata->instance);
++
++ /* NB EFX_VI_HW_RESOURCE_EVQPTR not used on Falcon */
++
++ i++;
++ switch (efx_state->nic->devtype.variant) {
++ case 'A':
++ hw_res_array[i].type = EFX_VI_HW_RESOURCE_EVQRPTR;
++ hw_res_array[i].mem_type = EFX_VI_HW_RESOURCE_PERIPHERAL;
++ hw_res_array[i].more_to_follow = 0;
++ hw_res_array[i].length = PAGE_SIZE;
++ hw_res_array[i].address = (unsigned long)phys +
++ EVQ_RPTR_REG_OFST +
++ (FALCON_REGISTER128 * mdata->instance);
++ break;
++ case 'B':
++ hw_res_array[i].type = EFX_VI_HW_RESOURCE_EVQRPTR_OFFSET;
++ hw_res_array[i].mem_type = EFX_VI_HW_RESOURCE_PERIPHERAL;
++ hw_res_array[i].more_to_follow = 0;
++ hw_res_array[i].length = PAGE_SIZE;
++ hw_res_array[i].address =
++ (unsigned long)FALCON_EVQ_RPTR_REG_P0;
++ break;
++ default:
++ EFRM_ASSERT(0);
++ break;
++ }
++
++ i++;
++ hw_res_array[i].type = EFX_VI_HW_RESOURCE_EVQMEMKVA;
++ hw_res_array[i].mem_type = EFX_VI_HW_RESOURCE_IOBUFFER;
++ hw_res_array[i].more_to_follow = 0;
++ hw_res_array[i].length = PAGE_SIZE;
++ hw_res_array[i].address = (unsigned long)efx_state->vi_res->
++ nic_info.evq_pages.iobuff.kva;
++
++ i++;
++ hw_res_array[i].type = EFX_VI_HW_RESOURCE_BELLPAGE;
++ hw_res_array[i].mem_type = EFX_VI_HW_RESOURCE_PERIPHERAL;
++ hw_res_array[i].more_to_follow = 0;
++ hw_res_array[i].length = PAGE_SIZE;
++ hw_res_array[i].address =
++ (unsigned long)(phys +
++ falcon_tx_dma_page_addr(mdata->instance))
++ >> PAGE_SHIFT;
++
++ i++;
++
++ EFRM_ASSERT(i <= *length);
++
++ *length = i;
++
++ return 0;
++}
++EXPORT_SYMBOL(efx_vi_hw_resource_get_phys);
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/eventq.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/eventq.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,321 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains event queue support.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efhw/debug.h>
++#include <ci/efhw/iopage.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efhw/eventq.h>
++#include <ci/efhw/falcon.h>
++#include <ci/efhw/nic.h>
++
++#define KEVENTQ_MAGIC 0x07111974
++
++/*! Helper function to allocate the iobuffer needed by an eventq
++ * - it ensures the eventq has the correct alignment for the NIC
++ *
++ * \param rm Event-queue resource manager
++ * \param instance Event-queue instance (index)
++ * \param buf_bytes Requested size of eventq
++ * \return < 0 if iobuffer allocation fails
++ */
++int
++efhw_nic_event_queue_alloc_iobuffer(struct efhw_nic *nic,
++ struct eventq_resource_hardware *h,
++ int evq_instance, unsigned buf_bytes)
++{
++ unsigned int page_order;
++ int rc;
++
++ /* Allocate an iobuffer. */
++ page_order = get_order(buf_bytes);
++
++ h->iobuff_off = 0;
++
++ EFHW_TRACE("allocating eventq size %x",
++ 1u << (page_order + PAGE_SHIFT));
++ rc = efhw_iopages_alloc(nic, &h->iobuff, page_order);
++ if (rc < 0) {
++ EFHW_WARN("%s: failed to allocate %u pages",
++ __func__, 1u << page_order);
++ return rc;
++ }
++
++ /* Set the eventq pages to match EFHW_CLEAR_EVENT() */
++ if (EFHW_CLEAR_EVENT_VALUE)
++ memset(efhw_iopages_ptr(&h->iobuff) + h->iobuff_off,
++ EFHW_CLEAR_EVENT_VALUE, (1u << page_order) * PAGE_SIZE);
++
++ EFHW_TRACE("%s: allocated %u pages", __func__, 1u << (page_order));
++
++ /* For Falcon the NIC is programmed with the base buffer address of a
++ * contiguous region of buffer space. This means that larger than a
++ * PAGE event queues can be expected to allocate even when the host's
++ * physical memory is fragmented */
++ EFHW_ASSERT(efhw_nic_have_hw(nic));
++ EFHW_ASSERT(page_order <= h->buf_tbl_alloc.order);
++
++ /* Initialise the buffer table entries. */
++ falcon_nic_buffer_table_set_n(nic, h->buf_tbl_alloc.base,
++ efhw_iopages_dma_addr(&h->iobuff) +
++ h->iobuff_off, EFHW_NIC_PAGE_SIZE, 0,
++ 1 << page_order, 0);
++
++ if (evq_instance >= FALCON_EVQ_TBL_RESERVED)
++ falcon_nic_buffer_table_confirm(nic);
++ return 0;
++}
++
++/**********************************************************************
++ * Kernel event queue management.
++ */
++
++/* Values for [struct efhw_keventq::lock] field. */
++#define KEVQ_UNLOCKED 0
++#define KEVQ_LOCKED 1
++#define KEVQ_RECHECK 2
++
++int
++efhw_keventq_ctor(struct efhw_nic *nic, int instance,
++ struct efhw_keventq *evq,
++ struct efhw_ev_handler *ev_handlers)
++{
++ int rc;
++ unsigned buf_bytes = evq->hw.capacity * sizeof(efhw_event_t);
++
++ evq->instance = instance;
++ evq->ev_handlers = ev_handlers;
++
++ /* allocate an IObuffer for the eventq */
++ rc = efhw_nic_event_queue_alloc_iobuffer(nic, &evq->hw, evq->instance,
++ buf_bytes);
++ if (rc < 0)
++ return rc;
++
++ /* Zero the timer-value for this queue.
++ AND Tell the nic about the event queue. */
++ efhw_nic_event_queue_enable(nic, evq->instance, evq->hw.capacity,
++ efhw_iopages_dma_addr(&evq->hw.iobuff) +
++ evq->hw.iobuff_off,
++ evq->hw.buf_tbl_alloc.base,
++ 1 /* interrupting */);
++
++ evq->lock = KEVQ_UNLOCKED;
++ evq->evq_base = efhw_iopages_ptr(&evq->hw.iobuff) + evq->hw.iobuff_off;
++ evq->evq_ptr = 0;
++ evq->evq_mask = (evq->hw.capacity * sizeof(efhw_event_t)) - 1u;
++
++ EFHW_TRACE("%s: [%d] base=%p end=%p", __func__, evq->instance,
++ evq->evq_base, evq->evq_base + buf_bytes);
++
++ return 0;
++}
++
++void efhw_keventq_dtor(struct efhw_nic *nic, struct efhw_keventq *evq)
++{
++ EFHW_ASSERT(evq);
++
++ EFHW_TRACE("%s: [%d]", __func__, evq->instance);
++
++ /* Zero the timer-value for this queue.
++ And Tell NIC to stop using this event queue. */
++ efhw_nic_event_queue_disable(nic, evq->instance, 0);
++
++ /* free the pages used by the eventq itself */
++ efhw_iopages_free(nic, &evq->hw.iobuff);
++}
++
++void
++efhw_handle_txdmaq_flushed(struct efhw_nic *nic, struct efhw_ev_handler *h,
++ efhw_event_t *evp)
++{
++ int instance = (int)FALCON_EVENT_TX_FLUSH_Q_ID(evp);
++ EFHW_TRACE("%s: instance=%d", __func__, instance);
++
++ if (!h->dmaq_flushed_fn) {
++ EFHW_WARN("%s: no handler registered", __func__);
++ return;
++ }
++
++ h->dmaq_flushed_fn(nic, instance, false);
++}
++
++void
++efhw_handle_rxdmaq_flushed(struct efhw_nic *nic, struct efhw_ev_handler *h,
++ efhw_event_t *evp)
++{
++ unsigned instance = (unsigned)FALCON_EVENT_RX_FLUSH_Q_ID(evp);
++ EFHW_TRACE("%s: instance=%d", __func__, instance);
++
++ if (!h->dmaq_flushed_fn) {
++ EFHW_WARN("%s: no handler registered", __func__);
++ return;
++ }
++
++ h->dmaq_flushed_fn(nic, instance, true);
++}
++
++void
++efhw_handle_wakeup_event(struct efhw_nic *nic, struct efhw_ev_handler *h,
++ efhw_event_t *evp)
++{
++ unsigned instance = (unsigned)FALCON_EVENT_WAKE_EVQ_ID(evp);
++
++ if (!h->wakeup_fn) {
++ EFHW_WARN("%s: no handler registered", __func__);
++ return;
++ }
++
++ h->wakeup_fn(nic, instance);
++}
++
++void
++efhw_handle_timeout_event(struct efhw_nic *nic, struct efhw_ev_handler *h,
++ efhw_event_t *evp)
++{
++ unsigned instance = (unsigned)FALCON_EVENT_WAKE_EVQ_ID(evp);
++
++ if (!h->timeout_fn) {
++ EFHW_WARN("%s: no handler registered", __func__);
++ return;
++ }
++
++ h->timeout_fn(nic, instance);
++}
++
++/**********************************************************************
++ * Kernel event queue event handling.
++ */
++
++int efhw_keventq_poll(struct efhw_nic *nic, struct efhw_keventq *q)
++{
++ efhw_event_t *ev;
++ int l, count = 0;
++
++ EFHW_ASSERT(nic);
++ EFHW_ASSERT(q);
++ EFHW_ASSERT(q->ev_handlers);
++
++ /* Acquire the lock, or mark the queue as needing re-checking. */
++ for (;;) {
++ l = q->lock;
++ if (l == KEVQ_UNLOCKED) {
++ if ((int)cmpxchg(&q->lock, l, KEVQ_LOCKED) == l)
++ break;
++ } else if (l == KEVQ_LOCKED) {
++ if ((int)cmpxchg(&q->lock, l, KEVQ_RECHECK) == l)
++ return 0;
++ } else { /* already marked for re-checking */
++ EFHW_ASSERT(l == KEVQ_RECHECK);
++ return 0;
++ }
++ }
++
++ if (unlikely(EFHW_EVENT_OVERFLOW(q, q)))
++ goto overflow;
++
++ ev = EFHW_EVENT_PTR(q, q, 0);
++
++#ifndef NDEBUG
++ if (!EFHW_IS_EVENT(ev))
++ EFHW_TRACE("%s: %d NO EVENTS!", __func__, q->instance);
++#endif
++
++ for (;;) {
++ /* Convention for return codes for handlers is:
++ ** 0 - no error, event consumed
++ ** 1 - no error, event not consumed
++ ** -ve - error, event not consumed
++ */
++ if (likely(EFHW_IS_EVENT(ev))) {
++ count++;
++
++ switch (FALCON_EVENT_CODE(ev)) {
++
++ case FALCON_EVENT_CODE_CHAR:
++ falcon_handle_char_event(nic, q->ev_handlers,
++ ev);
++ break;
++
++ default:
++ EFHW_ERR("efhw_keventq_poll: [%d] UNEXPECTED "
++ "EVENT:"FALCON_EVENT_FMT,
++ q->instance,
++ FALCON_EVENT_PRI_ARG(*ev));
++ }
++
++ EFHW_CLEAR_EVENT(ev);
++ EFHW_EVENTQ_NEXT(q);
++
++ ev = EFHW_EVENT_PTR(q, q, 0);
++ } else {
++ /* No events left. Release the lock (checking if we
++ * need to re-poll to avoid race). */
++ l = q->lock;
++ if (l == KEVQ_LOCKED) {
++ if ((int)cmpxchg(&q->lock, l, KEVQ_UNLOCKED)
++ == l) {
++ EFHW_TRACE
++ ("efhw_keventq_poll: %d clean exit",
++ q->instance);
++ goto clean_exit;
++ }
++ }
++
++ /* Potentially more work to do. */
++ l = q->lock;
++ EFHW_ASSERT(l == KEVQ_RECHECK);
++ EFHW_TEST((int)cmpxchg(&q->lock, l, KEVQ_LOCKED) == l);
++ EFHW_TRACE("efhw_keventq_poll: %d re-poll required",
++ q->instance);
++ }
++ }
++
++ /* shouldn't get here */
++ EFHW_ASSERT(0);
++
++overflow:
++ /* ?? Oh dear. Should we poll everything that could have possibly
++ ** happened? Or merely cry out in anguish...
++ */
++ EFHW_WARN("efhw_keventq_poll: %d ***** OVERFLOW nic %d *****",
++ q->instance, nic->index);
++
++ q->lock = KEVQ_UNLOCKED;
++ return count;
++
++clean_exit:
++ /* Ack the processed events so that this event queue can potentially
++ raise interrupts again */
++ falcon_nic_evq_ack(nic, q->instance,
++ (EFHW_EVENT_OFFSET(q, q, 0) / sizeof(efhw_event_t)),
++ false);
++ return count;
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/falcon.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/falcon.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,2525 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains Falcon hardware support.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/driver/efab/hardware.h>
++#include <ci/efhw/debug.h>
++#include <ci/efhw/iopage.h>
++#include <ci/efhw/falcon.h>
++#include <ci/efhw/falcon_hash.h>
++#include <ci/efhw/nic.h>
++#include <ci/efhw/eventq.h>
++#include <ci/efhw/checks.h>
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Workarounds and options
++ *
++ *---------------------------------------------------------------------------*/
++
++/* Keep a software copy of the filter table and check for duplicates. */
++#define FALCON_FULL_FILTER_CACHE 1
++
++/* Read filters back from the hardware to detect corruption. */
++#define FALCON_VERIFY_FILTERS 0
++
++/* Options */
++#define RX_FILTER_CTL_SRCH_LIMIT_TCP_FULL 8 /* default search limit */
++#define RX_FILTER_CTL_SRCH_LIMIT_TCP_WILD 8 /* default search limit */
++#define RX_FILTER_CTL_SRCH_LIMIT_UDP_FULL 8 /* default search limit */
++#define RX_FILTER_CTL_SRCH_LIMIT_UDP_WILD 8 /* default search limit */
++
++#define FALCON_MAC_SET_TYPE_BY_SPEED 0
++
++/* FIXME: We should detect mode at runtime. */
++#define FALCON_BUFFER_TABLE_FULL_MODE 1
++
++/* "Fudge factors" - difference between programmed value and actual depth */
++#define RX_FILTER_CTL_SRCH_FUDGE_WILD 3 /* increase the search limit */
++#define RX_FILTER_CTL_SRCH_FUDGE_FULL 1 /* increase the search limit */
++#define TX_FILTER_CTL_SRCH_FUDGE_WILD 3 /* increase the search limit */
++#define TX_FILTER_CTL_SRCH_FUDGE_FULL 1 /* increase the search limit */
++
++/*----------------------------------------------------------------------------
++ *
++ * Debug Macros
++ *
++ *---------------------------------------------------------------------------*/
++
++#define _DEBUG_SYM_ static
++
++ /*----------------------------------------------------------------------------
++ *
++ * Macros and forward declarations
++ *
++ *--------------------------------------------------------------------------*/
++
++#define FALCON_REGION_NUM 4 /* number of supported memory regions */
++
++#define FALCON_BUFFER_TBL_HALF_BYTES 4
++#define FALCON_BUFFER_TBL_FULL_BYTES 8
++
++/* Shadow buffer table - hack for testing only */
++#if FALCON_BUFFER_TABLE_FULL_MODE == 0
++# define FALCON_USE_SHADOW_BUFFER_TABLE 1
++#else
++# define FALCON_USE_SHADOW_BUFFER_TABLE 0
++#endif
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Header assertion checks
++ *
++ *---------------------------------------------------------------------------*/
++
++#define FALCON_ASSERT_VALID() /* nothing yet */
++
++/* Falcon has a 128bit register model but most registers have useful
++ defaults or only implement a small number of bits. Some registers
++ can be programmed 32bits UNLOCKED all others should be interlocked
++ against other threads within the same protection domain.
++
++ Aim is for software to perform the minimum number of writes and
++ also to minimise the read-modify-write activity (which generally
++ indicates a lack of clarity in the use model).
++
++ Registers which are programmed in this module are listed below
++ together with the method of access. Care must be taken to ensure
++ remain adequate if the register spec changes.
++
++ All 128bits programmed
++ FALCON_BUFFER_TBL_HALF
++ RX_FILTER_TBL
++ TX_DESC_PTR_TBL
++ RX_DESC_PTR_TBL
++ DRV_EV_REG
++
++ All 64bits programmed
++ FALCON_BUFFER_TBL_FULL
++
++ 32 bits are programmed (UNLOCKED)
++ EVQ_RPTR_REG
++
++ Low 64bits programmed remainder are written with a random number
++ RX_DC_CFG_REG
++ TX_DC_CFG_REG
++ SRM_RX_DC_CFG_REG
++ SRM_TX_DC_CFG_REG
++ BUF_TBL_CFG_REG
++ BUF_TBL_UPD_REG
++ SRM_UPD_EVQ_REG
++ EVQ_PTR_TBL
++ TIMER_CMD_REG
++ TX_PACE_TBL
++ FATAL_INTR_REG
++ INT_EN_REG (When enabling interrupts)
++ TX_FLUSH_DESCQ_REG
++ RX_FLUSH_DESCQ
++
++ Read Modify Write on low 32bits remainder are written with a random number
++ INT_EN_REG (When sending a driver interrupt)
++ DRIVER_REGX
++
++ Read Modify Write on low 64bits remainder are written with a random number
++ SRM_CFG_REG_OFST
++ RX_CFG_REG_OFST
++ RX_FILTER_CTL_REG
++
++ Read Modify Write on full 128bits
++ TXDP_RESERVED_REG (aka TXDP_UNDOCUMENTED)
++ TX_CFG_REG
++
++*/
++
++
++/*----------------------------------------------------------------------------
++ *
++ * DMAQ low-level register interface
++ *
++ *---------------------------------------------------------------------------*/
++
++static unsigned dmaq_sizes[] = {
++ 512,
++ EFHW_1K,
++ EFHW_2K,
++ EFHW_4K,
++};
++
++#define N_DMAQ_SIZES (sizeof(dmaq_sizes) / sizeof(dmaq_sizes[0]))
++
++static inline ulong falcon_dma_tx_q_offset(struct efhw_nic *nic, unsigned dmaq)
++{
++ EFHW_ASSERT(dmaq < nic->num_dmaqs);
++ return TX_DESC_PTR_TBL_OFST + dmaq * FALCON_REGISTER128;
++}
++
++static inline uint falcon_dma_tx_q_size_index(uint dmaq_size)
++{
++ uint i;
++
++ /* size must be one of the various options, otherwise we assert */
++ for (i = 0; i < N_DMAQ_SIZES; i++) {
++ if (dmaq_size == dmaq_sizes[i])
++ break;
++ }
++ EFHW_ASSERT(i < N_DMAQ_SIZES);
++ return i;
++}
++
++static void
++falcon_dmaq_tx_q_init(struct efhw_nic *nic,
++ uint dmaq, uint evq_id, uint own_id,
++ uint tag, uint dmaq_size, uint buf_idx, uint flags)
++{
++ FALCON_LOCK_DECL;
++ uint index, desc_type;
++ uint64_t val1, val2, val3;
++ ulong offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ /* Q attributes */
++ int iscsi_hdig_en = ((flags & EFHW_VI_ISCSI_TX_HDIG_EN) != 0);
++ int iscsi_ddig_en = ((flags & EFHW_VI_ISCSI_TX_DDIG_EN) != 0);
++ int csum_ip_dis = ((flags & EFHW_VI_TX_IP_CSUM_DIS) != 0);
++ int csum_tcp_dis = ((flags & EFHW_VI_TX_TCPUDP_CSUM_DIS) != 0);
++ int non_ip_drop_dis = ((flags & EFHW_VI_TX_TCPUDP_ONLY) == 0);
++
++ /* initialise the TX descriptor queue pointer table */
++
++ /* NB physical vs buffer addressing is determined by the Queue ID. */
++
++ offset = falcon_dma_tx_q_offset(nic, dmaq);
++ index = falcon_dma_tx_q_size_index(dmaq_size);
++
++ /* allow VI flag to override this queue's descriptor type */
++ desc_type = (flags & EFHW_VI_TX_PHYS_ADDR_EN) ? 0 : 1;
++
++ /* bug9403: It is dangerous to allow buffer-addressed queues to
++ * have owner_id=0. */
++ EFHW_ASSERT((own_id > 0) || desc_type == 0);
++
++ /* dword 1 */
++ __DWCHCK(TX_DESCQ_FLUSH_LBN, TX_DESCQ_FLUSH_WIDTH);
++ __DWCHCK(TX_DESCQ_TYPE_LBN, TX_DESCQ_TYPE_WIDTH);
++ __DWCHCK(TX_DESCQ_SIZE_LBN, TX_DESCQ_SIZE_WIDTH);
++ __DWCHCK(TX_DESCQ_LABEL_LBN, TX_DESCQ_LABEL_WIDTH);
++ __DWCHCK(TX_DESCQ_OWNER_ID_LBN, TX_DESCQ_OWNER_ID_WIDTH);
++
++ __LWCHK(TX_DESCQ_EVQ_ID_LBN, TX_DESCQ_EVQ_ID_WIDTH);
++
++ __RANGECHCK(1, TX_DESCQ_FLUSH_WIDTH);
++ __RANGECHCK(desc_type, TX_DESCQ_TYPE_WIDTH);
++ __RANGECHCK(index, TX_DESCQ_SIZE_WIDTH);
++ __RANGECHCK(tag, TX_DESCQ_LABEL_WIDTH);
++ __RANGECHCK(own_id, TX_DESCQ_OWNER_ID_WIDTH);
++ __RANGECHCK(evq_id, TX_DESCQ_EVQ_ID_WIDTH);
++
++ val1 = ((desc_type << TX_DESCQ_TYPE_LBN) |
++ (index << TX_DESCQ_SIZE_LBN) |
++ (tag << TX_DESCQ_LABEL_LBN) |
++ (own_id << TX_DESCQ_OWNER_ID_LBN) |
++ (__LOW(evq_id, TX_DESCQ_EVQ_ID_LBN, TX_DESCQ_EVQ_ID_WIDTH)));
++
++ /* dword 2 */
++ __DW2CHCK(TX_DESCQ_BUF_BASE_ID_LBN, TX_DESCQ_BUF_BASE_ID_WIDTH);
++ __RANGECHCK(buf_idx, TX_DESCQ_BUF_BASE_ID_WIDTH);
++
++ val2 = ((__HIGH(evq_id, TX_DESCQ_EVQ_ID_LBN, TX_DESCQ_EVQ_ID_WIDTH)) |
++ (buf_idx << __DW2(TX_DESCQ_BUF_BASE_ID_LBN)));
++
++ /* dword 3 */
++ __DW3CHCK(TX_ISCSI_HDIG_EN_LBN, TX_ISCSI_HDIG_EN_WIDTH);
++ __DW3CHCK(TX_ISCSI_DDIG_EN_LBN, TX_ISCSI_DDIG_EN_WIDTH);
++ __RANGECHCK(iscsi_hdig_en, TX_ISCSI_HDIG_EN_WIDTH);
++ __RANGECHCK(iscsi_ddig_en, TX_ISCSI_DDIG_EN_WIDTH);
++
++ val3 = ((iscsi_hdig_en << __DW3(TX_ISCSI_HDIG_EN_LBN)) |
++ (iscsi_ddig_en << __DW3(TX_ISCSI_DDIG_EN_LBN)) |
++ (1 << __DW3(TX_DESCQ_EN_LBN))); /* queue enable bit */
++
++ switch (nic->devtype.variant) {
++ case 'B':
++ __DW3CHCK(TX_NON_IP_DROP_DIS_B0_LBN,
++ TX_NON_IP_DROP_DIS_B0_WIDTH);
++ __DW3CHCK(TX_IP_CHKSM_DIS_B0_LBN, TX_IP_CHKSM_DIS_B0_WIDTH);
++ __DW3CHCK(TX_TCP_CHKSM_DIS_B0_LBN, TX_TCP_CHKSM_DIS_B0_WIDTH);
++
++ val3 |= ((non_ip_drop_dis << __DW3(TX_NON_IP_DROP_DIS_B0_LBN))|
++ (csum_ip_dis << __DW3(TX_IP_CHKSM_DIS_B0_LBN)) |
++ (csum_tcp_dis << __DW3(TX_TCP_CHKSM_DIS_B0_LBN)));
++ break;
++ case 'A':
++ if (csum_ip_dis || csum_tcp_dis || !non_ip_drop_dis)
++ EFHW_WARN
++ ("%s: bad settings for A1 csum_ip_dis=%d "
++ "csum_tcp_dis=%d non_ip_drop_dis=%d",
++ __func__, csum_ip_dis,
++ csum_tcp_dis, non_ip_drop_dis);
++ break;
++ default:
++ EFHW_ASSERT(0);
++ break;
++ }
++
++ EFHW_TRACE("%s: txq %x evq %u tag %x id %x buf %x "
++ "%x:%x:%x->%" PRIx64 ":%" PRIx64 ":%" PRIx64,
++ __func__,
++ dmaq, evq_id, tag, own_id, buf_idx, dmaq_size,
++ iscsi_hdig_en, iscsi_ddig_en, val1, val2, val3);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + offset, ((val2 << 32) | val1), val3);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++ return;
++}
++
++static inline ulong
++falcon_dma_rx_q_offset(struct efhw_nic *nic, unsigned dmaq)
++{
++ EFHW_ASSERT(dmaq < nic->num_dmaqs);
++ return RX_DESC_PTR_TBL_OFST + dmaq * FALCON_REGISTER128;
++}
++
++static void
++falcon_dmaq_rx_q_init(struct efhw_nic *nic,
++ uint dmaq, uint evq_id, uint own_id,
++ uint tag, uint dmaq_size, uint buf_idx, uint flags)
++{
++ FALCON_LOCK_DECL;
++ uint i, desc_type = 1;
++ uint64_t val1, val2, val3;
++ ulong offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ /* Q attributes */
++#if BUG5762_WORKAROUND
++ int jumbo = 1; /* Queues must not have mixed types */
++#else
++ int jumbo = ((flags & EFHW_VI_JUMBO_EN) != 0);
++#endif
++ int iscsi_hdig_en = ((flags & EFHW_VI_ISCSI_RX_HDIG_EN) != 0);
++ int iscsi_ddig_en = ((flags & EFHW_VI_ISCSI_RX_DDIG_EN) != 0);
++
++ /* initialise the TX descriptor queue pointer table */
++ offset = falcon_dma_rx_q_offset(nic, dmaq);
++
++ /* size must be one of the various options, otherwise we assert */
++ for (i = 0; i < N_DMAQ_SIZES; i++) {
++ if (dmaq_size == dmaq_sizes[i])
++ break;
++ }
++ EFHW_ASSERT(i < N_DMAQ_SIZES);
++
++ /* allow VI flag to override this queue's descriptor type */
++ desc_type = (flags & EFHW_VI_RX_PHYS_ADDR_EN) ? 0 : 1;
++
++ /* bug9403: It is dangerous to allow buffer-addressed queues to have
++ * owner_id=0 */
++ EFHW_ASSERT((own_id > 0) || desc_type == 0);
++
++ /* dword 1 */
++ __DWCHCK(RX_DESCQ_EN_LBN, RX_DESCQ_EN_WIDTH);
++ __DWCHCK(RX_DESCQ_JUMBO_LBN, RX_DESCQ_JUMBO_WIDTH);
++ __DWCHCK(RX_DESCQ_TYPE_LBN, RX_DESCQ_TYPE_WIDTH);
++ __DWCHCK(RX_DESCQ_SIZE_LBN, RX_DESCQ_SIZE_WIDTH);
++ __DWCHCK(RX_DESCQ_LABEL_LBN, RX_DESCQ_LABEL_WIDTH);
++ __DWCHCK(RX_DESCQ_OWNER_ID_LBN, RX_DESCQ_OWNER_ID_WIDTH);
++
++ __LWCHK(RX_DESCQ_EVQ_ID_LBN, RX_DESCQ_EVQ_ID_WIDTH);
++
++ __RANGECHCK(1, RX_DESCQ_EN_WIDTH);
++ __RANGECHCK(jumbo, RX_DESCQ_JUMBO_WIDTH);
++ __RANGECHCK(desc_type, RX_DESCQ_TYPE_WIDTH);
++ __RANGECHCK(i, RX_DESCQ_SIZE_WIDTH);
++ __RANGECHCK(tag, RX_DESCQ_LABEL_WIDTH);
++ __RANGECHCK(own_id, RX_DESCQ_OWNER_ID_WIDTH);
++ __RANGECHCK(evq_id, RX_DESCQ_EVQ_ID_WIDTH);
++
++ val1 = ((1 << RX_DESCQ_EN_LBN) |
++ (jumbo << RX_DESCQ_JUMBO_LBN) |
++ (desc_type << RX_DESCQ_TYPE_LBN) |
++ (i << RX_DESCQ_SIZE_LBN) |
++ (tag << RX_DESCQ_LABEL_LBN) |
++ (own_id << RX_DESCQ_OWNER_ID_LBN) |
++ (__LOW(evq_id, RX_DESCQ_EVQ_ID_LBN, RX_DESCQ_EVQ_ID_WIDTH)));
++
++ /* dword 2 */
++ __DW2CHCK(RX_DESCQ_BUF_BASE_ID_LBN, RX_DESCQ_BUF_BASE_ID_WIDTH);
++ __RANGECHCK(buf_idx, RX_DESCQ_BUF_BASE_ID_WIDTH);
++
++ val2 = ((__HIGH(evq_id, RX_DESCQ_EVQ_ID_LBN, RX_DESCQ_EVQ_ID_WIDTH)) |
++ (buf_idx << __DW2(RX_DESCQ_BUF_BASE_ID_LBN)));
++
++ /* dword 3 */
++ __DW3CHCK(RX_ISCSI_HDIG_EN_LBN, RX_ISCSI_HDIG_EN_WIDTH);
++ __DW3CHCK(RX_ISCSI_DDIG_EN_LBN, RX_ISCSI_DDIG_EN_WIDTH);
++ __RANGECHCK(iscsi_hdig_en, RX_ISCSI_HDIG_EN_WIDTH);
++ __RANGECHCK(iscsi_ddig_en, RX_ISCSI_DDIG_EN_WIDTH);
++
++ val3 = (iscsi_hdig_en << __DW3(RX_ISCSI_HDIG_EN_LBN)) |
++ (iscsi_ddig_en << __DW3(RX_ISCSI_DDIG_EN_LBN));
++
++ EFHW_TRACE("%s: rxq %x evq %u tag %x id %x buf %x %s "
++ "%x:%x:%x -> %" PRIx64 ":%" PRIx64 ":%" PRIx64,
++ __func__,
++ dmaq, evq_id, tag, own_id, buf_idx,
++ jumbo ? "jumbo" : "normal", dmaq_size,
++ iscsi_hdig_en, iscsi_ddig_en, val1, val2, val3);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + offset, ((val2 << 32) | val1), val3);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++ return;
++}
++
++static void falcon_dmaq_tx_q_disable(struct efhw_nic *nic, uint dmaq)
++{
++ FALCON_LOCK_DECL;
++ uint64_t val1, val2, val3;
++ ulong offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ /* initialise the TX descriptor queue pointer table */
++
++ offset = falcon_dma_tx_q_offset(nic, dmaq);
++
++ /* dword 1 */
++ __DWCHCK(TX_DESCQ_TYPE_LBN, TX_DESCQ_TYPE_WIDTH);
++
++ val1 = ((uint64_t) 1 << TX_DESCQ_TYPE_LBN);
++
++ /* dword 2 */
++ val2 = 0;
++
++ /* dword 3 */
++ val3 = (0 << __DW3(TX_DESCQ_EN_LBN)); /* queue enable bit */
++
++ EFHW_TRACE("%s: %x->%" PRIx64 ":%" PRIx64 ":%" PRIx64,
++ __func__, dmaq, val1, val2, val3);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + offset, ((val2 << 32) | val1), val3);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++ return;
++}
++
++static void falcon_dmaq_rx_q_disable(struct efhw_nic *nic, uint dmaq)
++{
++ FALCON_LOCK_DECL;
++ uint64_t val1, val2, val3;
++ ulong offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ /* initialise the TX descriptor queue pointer table */
++ offset = falcon_dma_rx_q_offset(nic, dmaq);
++
++ /* dword 1 */
++ __DWCHCK(RX_DESCQ_EN_LBN, RX_DESCQ_EN_WIDTH);
++ __DWCHCK(RX_DESCQ_TYPE_LBN, RX_DESCQ_TYPE_WIDTH);
++
++ val1 = ((0 << RX_DESCQ_EN_LBN) | (1 << RX_DESCQ_TYPE_LBN));
++
++ /* dword 2 */
++ val2 = 0;
++
++ /* dword 3 */
++ val3 = 0;
++
++ EFHW_TRACE("falcon_dmaq_rx_q_disable: %x->%"
++ PRIx64 ":%" PRIx64 ":%" PRIx64,
++ dmaq, val1, val2, val3);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + offset, ((val2 << 32) | val1), val3);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++ return;
++}
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Buffer Table low-level register interface
++ *
++ *---------------------------------------------------------------------------*/
++
++/*! Convert a (potentially) 64-bit physical address to 32-bits. Every use
++** of this function is a place where we're not 64-bit clean.
++*/
++static inline uint32_t dma_addr_to_u32(dma_addr_t addr)
++{
++ /* Top bits had better be zero! */
++ EFHW_ASSERT(addr == (addr & 0xffffffff));
++ return (uint32_t) addr;
++}
++
++static inline uint32_t
++falcon_nic_buffer_table_entry32_mk(dma_addr_t dma_addr, int own_id)
++{
++ uint32_t dma_addr32 = FALCON_BUFFER_4K_PAGE(dma_addr_to_u32(dma_addr));
++
++ /* don't do this to me */
++ EFHW_BUILD_ASSERT(BUF_ADR_HBUF_ODD_LBN == BUF_ADR_HBUF_EVEN_LBN + 32);
++ EFHW_BUILD_ASSERT(BUF_OWNER_ID_HBUF_ODD_LBN ==
++ BUF_OWNER_ID_HBUF_EVEN_LBN + 32);
++
++ EFHW_BUILD_ASSERT(BUF_OWNER_ID_HBUF_ODD_WIDTH ==
++ BUF_OWNER_ID_HBUF_EVEN_WIDTH);
++ EFHW_BUILD_ASSERT(BUF_ADR_HBUF_ODD_WIDTH == BUF_ADR_HBUF_EVEN_WIDTH);
++
++ __DWCHCK(BUF_ADR_HBUF_EVEN_LBN, BUF_ADR_HBUF_EVEN_WIDTH);
++ __DWCHCK(BUF_OWNER_ID_HBUF_EVEN_LBN, BUF_OWNER_ID_HBUF_EVEN_WIDTH);
++
++ __RANGECHCK(dma_addr32, BUF_ADR_HBUF_EVEN_WIDTH);
++ __RANGECHCK(own_id, BUF_OWNER_ID_HBUF_EVEN_WIDTH);
++
++ return (dma_addr32 << BUF_ADR_HBUF_EVEN_LBN) |
++ (own_id << BUF_OWNER_ID_HBUF_EVEN_LBN);
++}
++
++static inline uint64_t
++falcon_nic_buffer_table_entry64_mk(dma_addr_t dma_addr,
++ int bufsz, /* bytes */
++ int region, int own_id)
++{
++ __DW2CHCK(IP_DAT_BUF_SIZE_LBN, IP_DAT_BUF_SIZE_WIDTH);
++ __DW2CHCK(BUF_ADR_REGION_LBN, BUF_ADR_REGION_WIDTH);
++ __LWCHK(BUF_ADR_FBUF_LBN, BUF_ADR_FBUF_WIDTH);
++ __DWCHCK(BUF_OWNER_ID_FBUF_LBN, BUF_OWNER_ID_FBUF_WIDTH);
++
++ EFHW_ASSERT((bufsz == EFHW_4K) || (bufsz == EFHW_8K));
++
++ dma_addr = (dma_addr >> 12) & __FALCON_MASK64(BUF_ADR_FBUF_WIDTH);
++
++ __RANGECHCK(dma_addr, BUF_ADR_FBUF_WIDTH);
++ __RANGECHCK(1, IP_DAT_BUF_SIZE_WIDTH);
++ __RANGECHCK(region, BUF_ADR_REGION_WIDTH);
++ __RANGECHCK(own_id, BUF_OWNER_ID_FBUF_WIDTH);
++
++ return ((uint64_t) (bufsz == EFHW_8K) << IP_DAT_BUF_SIZE_LBN) |
++ ((uint64_t) region << BUF_ADR_REGION_LBN) |
++ ((uint64_t) dma_addr << BUF_ADR_FBUF_LBN) |
++ ((uint64_t) own_id << BUF_OWNER_ID_FBUF_LBN);
++}
++
++static inline void
++_falcon_nic_buffer_table_set32(struct efhw_nic *nic,
++ dma_addr_t dma_addr, uint bufsz,
++ uint region, /* not used */
++ int own_id, int buffer_id)
++{
++ /* programming the half table needs to be done in pairs. */
++ uint64_t entry, val, shift;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ volatile char __iomem *offset;
++
++ EFHW_BUILD_ASSERT(BUF_ADR_HBUF_ODD_LBN == BUF_ADR_HBUF_EVEN_LBN + 32);
++ EFHW_BUILD_ASSERT(BUF_OWNER_ID_HBUF_ODD_LBN ==
++ BUF_OWNER_ID_HBUF_EVEN_LBN + 32);
++
++ shift = (buffer_id & 1) ? 32 : 0;
++
++ offset = (efhw_kva + BUF_HALF_TBL_OFST +
++ ((buffer_id & ~1) * FALCON_BUFFER_TBL_HALF_BYTES));
++
++ entry = falcon_nic_buffer_table_entry32_mk(dma_addr_to_u32(dma_addr),
++ own_id);
++
++#if FALCON_USE_SHADOW_BUFFER_TABLE
++ val = _falcon_buffer_table[buffer_id & ~1];
++#else
++ /* This will not work unless we've completed
++ * the buffer table updates */
++ falcon_read_q(offset, &val);
++#endif
++ val &= ~(((uint64_t) 0xffffffff) << shift);
++ val |= (entry << shift);
++
++ EFHW_TRACE("%s[%x]: %lx:%x:%" PRIx64 "->%x = %"
++ PRIx64, __func__, buffer_id, (unsigned long) dma_addr,
++ own_id, entry, (unsigned)(offset - efhw_kva), val);
++
++ /* Falcon requires that access to this register is serialised */
++ falcon_write_q(offset, val);
++
++ /* NB. No mmiowb(). Caller should do that e.g by calling commit */
++
++#if FALCON_USE_SHADOW_BUFFER_TABLE
++ _falcon_buffer_table[buffer_id & ~1] = val;
++#endif
++
++ /* Confirm the entry if the event queues haven't been set up. */
++ if (!nic->irq_handler) {
++ uint64_t new_val;
++ int count = 0;
++ while (1) {
++ mmiowb();
++ falcon_read_q(offset, &new_val);
++ if (new_val == val)
++ break;
++ count++;
++ if (count > 1000) {
++ EFHW_WARN("%s: poll Timeout", __func__);
++ break;
++ }
++ udelay(1);
++ }
++ }
++}
++
++static inline void
++_falcon_nic_buffer_table_set64(struct efhw_nic *nic,
++ dma_addr_t dma_addr, uint bufsz,
++ uint region, int own_id, int buffer_id)
++{
++ volatile char __iomem *offset;
++ uint64_t entry;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ EFHW_ASSERT(region < FALCON_REGION_NUM);
++
++ EFHW_ASSERT((bufsz == EFHW_4K) ||
++ (bufsz == EFHW_8K && FALCON_BUFFER_TABLE_FULL_MODE));
++
++ offset = (efhw_kva + BUF_FULL_TBL_OFST +
++ (buffer_id * FALCON_BUFFER_TBL_FULL_BYTES));
++
++ entry = falcon_nic_buffer_table_entry64_mk(dma_addr, bufsz, region,
++ own_id);
++
++ EFHW_TRACE("%s[%x]: %lx:bufsz=%x:region=%x:ownid=%x",
++ __func__, buffer_id, (unsigned long) dma_addr, bufsz,
++ region, own_id);
++
++ EFHW_TRACE("%s: BUF[%x]:NIC[%x]->%" PRIx64,
++ __func__, buffer_id,
++ (unsigned int)(offset - efhw_kva), entry);
++
++ /* Falcon requires that access to this register is serialised */
++ falcon_write_q(offset, entry);
++
++ /* NB. No mmiowb(). Caller should do that e.g by calling commit */
++
++ /* Confirm the entry if the event queues haven't been set up. */
++ if (!nic->irq_handler) {
++ uint64_t new_entry;
++ int count = 0;
++ while (1) {
++ mmiowb();
++ falcon_read_q(offset, &new_entry);
++ if (new_entry == entry)
++ return;
++ count++;
++ if (count > 1000) {
++ EFHW_WARN("%s: poll Timeout waiting for "
++ "value %"PRIx64
++ " (last was %"PRIx64")",
++ __func__, entry, new_entry);
++ break;
++ }
++ udelay(1);
++ }
++ }
++}
++
++#if FALCON_BUFFER_TABLE_FULL_MODE
++#define _falcon_nic_buffer_table_set _falcon_nic_buffer_table_set64
++#else
++#define _falcon_nic_buffer_table_set _falcon_nic_buffer_table_set32
++#endif
++
++static inline void _falcon_nic_buffer_table_commit(struct efhw_nic *nic)
++{
++ /* MUST be called holding the FALCON_LOCK */
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ uint64_t cmd;
++
++ EFHW_BUILD_ASSERT(BUF_TBL_UPD_REG_KER_OFST == BUF_TBL_UPD_REG_OFST);
++
++ __DW2CHCK(BUF_UPD_CMD_LBN, BUF_UPD_CMD_WIDTH);
++ __RANGECHCK(1, BUF_UPD_CMD_WIDTH);
++
++ cmd = ((uint64_t) 1 << BUF_UPD_CMD_LBN);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ falcon_write_qq(efhw_kva + BUF_TBL_UPD_REG_OFST,
++ cmd, FALCON_ATOMIC_UPD_REG);
++ mmiowb();
++
++ nic->buf_commit_outstanding++;
++ EFHW_TRACE("COMMIT REQ out=%d", nic->buf_commit_outstanding);
++}
++
++static void falcon_nic_buffer_table_commit(struct efhw_nic *nic)
++{
++ /* nothing to do */
++}
++
++static inline void
++_falcon_nic_buffer_table_clear(struct efhw_nic *nic, int buffer_id, int num)
++{
++ uint64_t cmd;
++ uint64_t start_id = buffer_id;
++ uint64_t end_id = buffer_id + num - 1;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ volatile char __iomem *offset = (efhw_kva + BUF_TBL_UPD_REG_OFST);
++
++ EFHW_BUILD_ASSERT(BUF_TBL_UPD_REG_KER_OFST == BUF_TBL_UPD_REG_OFST);
++
++#if !FALCON_BUFFER_TABLE_FULL_MODE
++ /* buffer_ids in half buffer mode reference pairs of buffers */
++ EFHW_ASSERT(buffer_id % 1 == 0);
++ EFHW_ASSERT(num % 1 == 0);
++ start_id = start_id >> 1;
++ end_id = end_id >> 1;
++#endif
++
++ EFHW_ASSERT(num >= 1);
++
++ __DWCHCK(BUF_CLR_START_ID_LBN, BUF_CLR_START_ID_WIDTH);
++ __DW2CHCK(BUF_CLR_END_ID_LBN, BUF_CLR_END_ID_WIDTH);
++
++ __DW2CHCK(BUF_CLR_CMD_LBN, BUF_CLR_CMD_WIDTH);
++ __RANGECHCK(1, BUF_CLR_CMD_WIDTH);
++
++ __RANGECHCK(start_id, BUF_CLR_START_ID_WIDTH);
++ __RANGECHCK(end_id, BUF_CLR_END_ID_WIDTH);
++
++ cmd = (((uint64_t) 1 << BUF_CLR_CMD_LBN) |
++ (start_id << BUF_CLR_START_ID_LBN) |
++ (end_id << BUF_CLR_END_ID_LBN));
++
++ /* Falcon requires 128 bit atomic access for this register */
++ falcon_write_qq(offset, cmd, FALCON_ATOMIC_UPD_REG);
++ mmiowb();
++
++ nic->buf_commit_outstanding++;
++ EFHW_TRACE("COMMIT CLEAR out=%d", nic->buf_commit_outstanding);
++}
++
++/*----------------------------------------------------------------------------
++ *
++ * Events low-level register interface
++ *
++ *---------------------------------------------------------------------------*/
++
++static unsigned eventq_sizes[] = {
++ 512,
++ EFHW_1K,
++ EFHW_2K,
++ EFHW_4K,
++ EFHW_8K,
++ EFHW_16K,
++ EFHW_32K
++};
++
++#define N_EVENTQ_SIZES (sizeof(eventq_sizes) / sizeof(eventq_sizes[0]))
++
++static inline void falcon_nic_srm_upd_evq(struct efhw_nic *nic, int evq)
++{
++ /* set up the eventq which will receive events from the SRAM module.
++ * i.e buffer table updates and clears, TX and RX aperture table
++ * updates */
++
++ FALCON_LOCK_DECL;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ EFHW_BUILD_ASSERT(SRM_UPD_EVQ_REG_OFST == SRM_UPD_EVQ_REG_KER_OFST);
++
++ __DWCHCK(SRM_UPD_EVQ_ID_LBN, SRM_UPD_EVQ_ID_WIDTH);
++ __RANGECHCK(evq, SRM_UPD_EVQ_ID_WIDTH);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + SRM_UPD_EVQ_REG_OFST,
++ ((uint64_t) evq << SRM_UPD_EVQ_ID_LBN),
++ FALCON_ATOMIC_SRPM_UDP_EVQ_REG);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++static void
++falcon_nic_evq_ptr_tbl(struct efhw_nic *nic,
++ uint evq, /* evq id */
++ uint enable, /* 1 to enable, 0 to disable */
++ uint buf_base_id,/* Buffer table base for EVQ */
++ uint evq_size /* Number of events */)
++{
++ FALCON_LOCK_DECL;
++ uint i, val;
++ ulong offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ /* size must be one of the various options, otherwise we assert */
++ for (i = 0; i < N_EVENTQ_SIZES; i++) {
++ if (evq_size <= eventq_sizes[i])
++ break;
++ }
++ EFHW_ASSERT(i < N_EVENTQ_SIZES);
++
++ __DWCHCK(EVQ_BUF_BASE_ID_LBN, EVQ_BUF_BASE_ID_WIDTH);
++ __DWCHCK(EVQ_SIZE_LBN, EVQ_SIZE_WIDTH);
++ __DWCHCK(EVQ_EN_LBN, EVQ_EN_WIDTH);
++
++ __RANGECHCK(i, EVQ_SIZE_WIDTH);
++ __RANGECHCK(buf_base_id, EVQ_BUF_BASE_ID_WIDTH);
++ __RANGECHCK(1, EVQ_EN_WIDTH);
++
++ /* if !enable then only evq needs to be correct, although valid
++ * values need to be passed in for other arguments to prevent
++ * assertions */
++
++ val = ((i << EVQ_SIZE_LBN) | (buf_base_id << EVQ_BUF_BASE_ID_LBN) |
++ (enable ? (1 << EVQ_EN_LBN) : 0));
++
++ EFHW_ASSERT(evq < nic->num_evqs);
++
++ offset = EVQ_PTR_TBL_CHAR_OFST;
++ offset += evq * FALCON_REGISTER128;
++
++ EFHW_TRACE("%s: evq %u en=%x:buf=%x:size=%x->%x at %lx",
++ __func__, evq, enable, buf_base_id, evq_size, val,
++ offset);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + offset, val, FALCON_ATOMIC_PTR_TBL_REG);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++
++ /* caller must wait for an update done event before writing any more
++ table entries */
++
++ return;
++}
++
++void
++falcon_nic_evq_ack(struct efhw_nic *nic,
++ uint evq, /* evq id */
++ uint rptr, /* new read pointer update */
++ bool wakeup /* request a wakeup event if ptr's != */
++ )
++{
++ uint val;
++ ulong offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ EFHW_BUILD_ASSERT(FALCON_EVQ_CHAR == 4);
++
++ __DWCHCK(EVQ_RPTR_LBN, EVQ_RPTR_WIDTH);
++ __RANGECHCK(rptr, EVQ_RPTR_WIDTH);
++
++ val = (rptr << EVQ_RPTR_LBN);
++
++ EFHW_ASSERT(evq < nic->num_evqs);
++
++ if (evq < FALCON_EVQ_CHAR) {
++ offset = EVQ_RPTR_REG_KER_OFST;
++ offset += evq * FALCON_REGISTER128;
++
++ EFHW_ASSERT(!wakeup); /* don't try this at home */
++ } else {
++ offset = EVQ_RPTR_REG_OFST + (FALCON_EVQ_CHAR *
++ FALCON_REGISTER128);
++ offset += (evq - FALCON_EVQ_CHAR) * FALCON_REGISTER128;
++
++ /* nothing to do for interruptless event queues which do
++ * not want a wakeup */
++ if (evq != FALCON_EVQ_CHAR && !wakeup)
++ return;
++ }
++
++ EFHW_TRACE("%s: %x %x %x->%x", __func__, evq, rptr, wakeup, val);
++
++ writel(val, efhw_kva + offset);
++ mmiowb();
++}
++
++/*---------------------------------------------------------------------------*/
++
++static inline void
++falcon_drv_ev(struct efhw_nic *nic, uint64_t data, uint qid)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ /* send an event from one driver to the other */
++ EFHW_BUILD_ASSERT(DRV_EV_REG_KER_OFST == DRV_EV_REG_OFST);
++ EFHW_BUILD_ASSERT(DRV_EV_DATA_LBN == 0);
++ EFHW_BUILD_ASSERT(DRV_EV_DATA_WIDTH == 64);
++ EFHW_BUILD_ASSERT(DRV_EV_QID_LBN == 64);
++ EFHW_BUILD_ASSERT(DRV_EV_QID_WIDTH == 12);
++
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + DRV_EV_REG_OFST, data, qid);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++_DEBUG_SYM_ void
++falcon_ab_timer_tbl_set(struct efhw_nic *nic,
++ uint evq, /* timer id */
++ uint mode, /* mode bits */
++ uint countdown /* counting value to set */)
++{
++ FALCON_LOCK_DECL;
++ uint val;
++ ulong offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ EFHW_BUILD_ASSERT(TIMER_VAL_LBN == 0);
++
++ __DWCHCK(TIMER_MODE_LBN, TIMER_MODE_WIDTH);
++ __DWCHCK(TIMER_VAL_LBN, TIMER_VAL_WIDTH);
++
++ __RANGECHCK(mode, TIMER_MODE_WIDTH);
++ __RANGECHCK(countdown, TIMER_VAL_WIDTH);
++
++ val = ((mode << TIMER_MODE_LBN) | (countdown << TIMER_VAL_LBN));
++
++ if (evq < FALCON_EVQ_CHAR) {
++ offset = TIMER_CMD_REG_KER_OFST;
++ offset += evq * EFHW_8K; /* PAGE mapped register */
++ } else {
++ offset = TIMER_TBL_OFST;
++ offset += evq * FALCON_REGISTER128;
++ }
++ EFHW_ASSERT(evq < nic->num_evqs);
++
++ EFHW_TRACE("%s: evq %u mode %x (%s) time %x -> %08x",
++ __func__, evq, mode,
++ mode == 0 ? "DISABLE" :
++ mode == 1 ? "IMMED" :
++ mode == 2 ? (evq < 5 ? "HOLDOFF" : "RX_TRIG") :
++ "<BAD>", countdown, val);
++
++ /* Falcon requires 128 bit atomic access for this register when
++ * accessed from the driver. User access to timers is paged mapped
++ */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + offset, val, FALCON_ATOMIC_TIMER_CMD_REG);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++ return;
++}
++
++
++/*--------------------------------------------------------------------
++ *
++ * Rate pacing - Low level interface
++ *
++ *--------------------------------------------------------------------*/
++void falcon_nic_pace(struct efhw_nic *nic, uint dmaq, uint pace)
++{
++ /* Pace specified in 2^(units of microseconds). This is the minimum
++ additional delay imposed over and above the IPG.
++
++ Pacing only available on the virtual interfaces
++ */
++ FALCON_LOCK_DECL;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ ulong offset;
++
++ if (pace > 20)
++ pace = 20; /* maxm supported value */
++
++ __DWCHCK(TX_PACE_LBN, TX_PACE_WIDTH);
++ __RANGECHCK(pace, TX_PACE_WIDTH);
++
++ switch (nic->devtype.variant) {
++ case 'A':
++ EFHW_ASSERT(dmaq >= TX_PACE_TBL_FIRST_QUEUE_A1);
++ offset = TX_PACE_TBL_A1_OFST;
++ offset += (dmaq - TX_PACE_TBL_FIRST_QUEUE_A1) * 16;
++ break;
++ case 'B':
++ /* Would be nice to assert this, but as dmaq is unsigned and
++ * TX_PACE_TBL_FIRST_QUEUE_B0 is 0, it makes no sense
++ * EFHW_ASSERT(dmaq >= TX_PACE_TBL_FIRST_QUEUE_B0);
++ */
++ offset = TX_PACE_TBL_B0_OFST;
++ offset += (dmaq - TX_PACE_TBL_FIRST_QUEUE_B0) * 16;
++ break;
++ default:
++ EFHW_ASSERT(0);
++ offset = 0;
++ break;
++ }
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + offset, pace, FALCON_ATOMIC_PACE_REG);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++
++ EFHW_TRACE("%s: txq %d offset=%lx pace=2^%x",
++ __func__, dmaq, offset, pace);
++}
++
++/*--------------------------------------------------------------------
++ *
++ * Interrupt - Low level interface
++ *
++ *--------------------------------------------------------------------*/
++
++static void falcon_nic_handle_fatal_int(struct efhw_nic *nic)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ uint64_t val;
++
++ offset = (efhw_kva + FATAL_INTR_REG_OFST);
++
++ /* Falcon requires 32 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ val = readl(offset);
++ FALCON_LOCK_UNLOCK(nic);
++
++ /* ?? BUG3249 - need to disable illegal address interrupt */
++ /* ?? BUG3114 - need to backport interrupt storm protection code */
++ EFHW_ERR("fatal interrupt: %s%s%s%s%s%s%s%s%s%s%s%s[%" PRIx64 "]",
++ val & (1 << PCI_BUSERR_INT_CHAR_LBN) ? "PCI-bus-error " : "",
++ val & (1 << SRAM_OOB_INT_CHAR_LBN) ? "SRAM-oob " : "",
++ val & (1 << BUFID_OOB_INT_CHAR_LBN) ? "bufid-oob " : "",
++ val & (1 << MEM_PERR_INT_CHAR_LBN) ? "int-parity " : "",
++ val & (1 << RBUF_OWN_INT_CHAR_LBN) ? "rx-bufid-own " : "",
++ val & (1 << TBUF_OWN_INT_CHAR_LBN) ? "tx-bufid-own " : "",
++ val & (1 << RDESCQ_OWN_INT_CHAR_LBN) ? "rx-desc-own " : "",
++ val & (1 << TDESCQ_OWN_INT_CHAR_LBN) ? "tx-desc-own " : "",
++ val & (1 << EVQ_OWN_INT_CHAR_LBN) ? "evq-own " : "",
++ val & (1 << EVFF_OFLO_INT_CHAR_LBN) ? "evq-fifo " : "",
++ val & (1 << ILL_ADR_INT_CHAR_LBN) ? "ill-addr " : "",
++ val & (1 << SRM_PERR_INT_CHAR_LBN) ? "sram-parity " : "", val);
++}
++
++static void falcon_nic_interrupt_hw_enable(struct efhw_nic *nic)
++{
++ FALCON_LOCK_DECL;
++ uint val;
++ volatile char __iomem *offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ EFHW_BUILD_ASSERT(DRV_INT_EN_CHAR_WIDTH == 1);
++
++ if (nic->flags & NIC_FLAG_NO_INTERRUPT)
++ return;
++
++ offset = (efhw_kva + INT_EN_REG_CHAR_OFST);
++ val = 1 << DRV_INT_EN_CHAR_LBN;
++
++ EFHW_NOTICE("%s: %x -> %x", __func__, (int)(offset - efhw_kva),
++ val);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(offset, val, FALCON_ATOMIC_INT_EN_REG);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++static void falcon_nic_interrupt_hw_disable(struct efhw_nic *nic)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ EFHW_BUILD_ASSERT(SRAM_PERR_INT_KER_WIDTH == 1);
++ EFHW_BUILD_ASSERT(DRV_INT_EN_KER_LBN == 0);
++ EFHW_BUILD_ASSERT(SRAM_PERR_INT_CHAR_WIDTH == 1);
++ EFHW_BUILD_ASSERT(DRV_INT_EN_CHAR_LBN == 0);
++ EFHW_BUILD_ASSERT(SRAM_PERR_INT_KER_LBN == SRAM_PERR_INT_CHAR_LBN);
++ EFHW_BUILD_ASSERT(DRV_INT_EN_KER_LBN == DRV_INT_EN_CHAR_LBN);
++
++ if (nic->flags & NIC_FLAG_NO_INTERRUPT)
++ return;
++
++ offset = (efhw_kva + INT_EN_REG_CHAR_OFST);
++
++ EFHW_NOTICE("%s: %x -> 0", __func__, (int)(offset - efhw_kva));
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(offset, 0, FALCON_ATOMIC_INT_EN_REG);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++static void falcon_nic_irq_addr_set(struct efhw_nic *nic, dma_addr_t dma_addr)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *offset;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++
++ offset = (efhw_kva + INT_ADR_REG_CHAR_OFST);
++
++ EFHW_NOTICE("%s: %x -> " DMA_ADDR_T_FMT, __func__,
++ (int)(offset - efhw_kva), dma_addr);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(offset, dma_addr, FALCON_ATOMIC_INT_ADR_REG);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++
++/*--------------------------------------------------------------------
++ *
++ * RXDP - low level interface
++ *
++ *--------------------------------------------------------------------*/
++
++void
++falcon_nic_set_rx_usr_buf_size(struct efhw_nic *nic, int usr_buf_bytes)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ uint64_t val, val2, usr_buf_size = usr_buf_bytes / 32;
++ int rubs_lbn, rubs_width, roec_lbn;
++
++ EFHW_BUILD_ASSERT(RX_CFG_REG_OFST == RX_CFG_REG_KER_OFST);
++
++ switch (nic->devtype.variant) {
++ default:
++ EFHW_ASSERT(0);
++ /* Fall-through to avoid compiler warnings. */
++ case 'A':
++ rubs_lbn = RX_USR_BUF_SIZE_A1_LBN;
++ rubs_width = RX_USR_BUF_SIZE_A1_WIDTH;
++ roec_lbn = RX_OWNERR_CTL_A1_LBN;
++ break;
++ case 'B':
++ rubs_lbn = RX_USR_BUF_SIZE_B0_LBN;
++ rubs_width = RX_USR_BUF_SIZE_B0_WIDTH;
++ roec_lbn = RX_OWNERR_CTL_B0_LBN;
++ break;
++ }
++
++ __DWCHCK(rubs_lbn, rubs_width);
++ __QWCHCK(roec_lbn, 1);
++ __RANGECHCK(usr_buf_size, rubs_width);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_read_qq(efhw_kva + RX_CFG_REG_OFST, &val, &val2);
++
++ val &= ~((__FALCON_MASK64(rubs_width)) << rubs_lbn);
++ val |= (usr_buf_size << rubs_lbn);
++
++ /* shouldn't be needed for a production driver */
++ val |= ((uint64_t) 1 << roec_lbn);
++
++ falcon_write_qq(efhw_kva + RX_CFG_REG_OFST, val, val2);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++EXPORT_SYMBOL(falcon_nic_set_rx_usr_buf_size);
++
++
++/*--------------------------------------------------------------------
++ *
++ * TXDP - low level interface
++ *
++ *--------------------------------------------------------------------*/
++
++_DEBUG_SYM_ void falcon_nic_tx_cfg(struct efhw_nic *nic, int unlocked)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ uint64_t val1, val2;
++
++ EFHW_BUILD_ASSERT(TX_CFG_REG_OFST == TX_CFG_REG_KER_OFST);
++ __DWCHCK(TX_OWNERR_CTL_LBN, TX_OWNERR_CTL_WIDTH);
++ __DWCHCK(TX_NON_IP_DROP_DIS_LBN, TX_NON_IP_DROP_DIS_WIDTH);
++
++ FALCON_LOCK_LOCK(nic);
++ falcon_read_qq(efhw_kva + TX_CFG_REG_OFST, &val1, &val2);
++
++ /* Will flag fatal interrupts on owner id errors. This should not be
++ on for production code because there is otherwise a denial of
++ serivce attack possible */
++ val1 |= (1 << TX_OWNERR_CTL_LBN);
++
++ /* Setup user queue TCP/UDP only packet security */
++ if (unlocked)
++ val1 |= (1 << TX_NON_IP_DROP_DIS_LBN);
++ else
++ val1 &= ~(1 << TX_NON_IP_DROP_DIS_LBN);
++
++ falcon_write_qq(efhw_kva + TX_CFG_REG_OFST, val1, val2);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++/*--------------------------------------------------------------------
++ *
++ * Random thresholds - Low level interface (Would like these to be op
++ * defaults wherever possible)
++ *
++ *--------------------------------------------------------------------*/
++
++void falcon_nic_pace_cfg(struct efhw_nic *nic, int fb_base, int bin_thresh)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ unsigned offset = 0;
++ uint64_t val;
++
++ __DWCHCK(TX_PACE_FB_BASE_LBN, TX_PACE_FB_BASE_WIDTH);
++ __DWCHCK(TX_PACE_BIN_TH_LBN, TX_PACE_BIN_TH_WIDTH);
++
++ switch (nic->devtype.variant) {
++ case 'A': offset = TX_PACE_REG_A1_OFST; break;
++ case 'B': offset = TX_PACE_REG_B0_OFST; break;
++ default: EFHW_ASSERT(0); break;
++ }
++
++ val = (0x15 << TX_PACE_SB_NOTAF_LBN);
++ val |= (0xb << TX_PACE_SB_AF_LBN);
++
++ val |= ((fb_base & __FALCON_MASK64(TX_PACE_FB_BASE_WIDTH)) <<
++ TX_PACE_FB_BASE_LBN);
++ val |= ((bin_thresh & __FALCON_MASK64(TX_PACE_BIN_TH_WIDTH)) <<
++ TX_PACE_BIN_TH_LBN);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + offset, val, 0);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++
++/**********************************************************************
++ * Implementation of the HAL. ********************************************
++ **********************************************************************/
++
++/*----------------------------------------------------------------------------
++ *
++ * Initialisation and configuration discovery
++ *
++ *---------------------------------------------------------------------------*/
++
++static int falcon_nic_init_irq_channel(struct efhw_nic *nic, int enable)
++{
++ /* create a buffer for the irq channel */
++ int rc;
++
++ if (enable) {
++ rc = efhw_iopage_alloc(nic, &nic->irq_iobuff);
++ if (rc < 0)
++ return rc;
++
++ falcon_nic_irq_addr_set(nic,
++ efhw_iopage_dma_addr(&nic->irq_iobuff));
++ } else {
++ if (efhw_iopage_is_valid(&nic->irq_iobuff))
++ efhw_iopage_free(nic, &nic->irq_iobuff);
++
++ efhw_iopage_mark_invalid(&nic->irq_iobuff);
++ falcon_nic_irq_addr_set(nic, 0);
++ }
++
++ EFHW_TRACE("%s: %lx %sable", __func__,
++ (unsigned long) efhw_iopage_dma_addr(&nic->irq_iobuff),
++ enable ? "en" : "dis");
++
++ return 0;
++}
++
++static void falcon_nic_close_hardware(struct efhw_nic *nic)
++{
++ /* check we are in possession of some hardware */
++ if (!efhw_nic_have_hw(nic))
++ return;
++
++ falcon_nic_init_irq_channel(nic, 0);
++ falcon_nic_filter_dtor(nic);
++
++ EFHW_NOTICE("%s:", __func__);
++}
++
++static int
++falcon_nic_init_hardware(struct efhw_nic *nic,
++ struct efhw_ev_handler *ev_handlers,
++ const uint8_t *mac_addr, int non_irq_evq)
++{
++ int rc;
++
++ /* header sanity checks */
++ FALCON_ASSERT_VALID();
++
++ /* Initialise supporting modules */
++ rc = falcon_nic_filter_ctor(nic);
++ if (rc < 0)
++ return rc;
++
++#if FALCON_USE_SHADOW_BUFFER_TABLE
++ CI_ZERO_ARRAY(_falcon_buffer_table, FALCON_BUFFER_TBL_NUM);
++#endif
++
++ /* Initialise the top level hardware blocks */
++ memcpy(nic->mac_addr, mac_addr, ETH_ALEN);
++
++ EFHW_TRACE("%s:", __func__);
++
++ /* nic.c:efhw_nic_init marks all the interrupt units as unused.
++
++ ?? TODO we should be able to request the non-interrupting event
++ queue and the net driver's (for a net driver that is using libefhw)
++ additional RSS queues here.
++
++ Result would be that that net driver could call
++ nic.c:efhw_nic_allocate_common_hardware_resources() and that the
++ IFDEF FALCON's can be removed from
++ nic.c:efhw_nic_allocate_common_hardware_resources()
++ */
++ nic->irq_unit = INT_EN_REG_CHAR_OFST;
++
++ /*****************************************************************
++ * The rest of this function deals with initialization of the NICs
++ * hardware (as opposed to the initialization of the
++ * struct efhw_nic data structure */
++
++ /* char driver grabs SRM events onto the non interrupting
++ * event queue */
++ falcon_nic_srm_upd_evq(nic, non_irq_evq);
++
++ /* RXDP tweaks */
++
++ /* ?? bug2396 rx_cfg should be ok so long as the net driver
++ * always pushes buffers big enough for the link MTU */
++
++ /* set the RX buffer cutoff size to be the same as PAGE_SIZE.
++ * Use this value when we think that there will be a lot of
++ * jumbo frames.
++ *
++ * The default value 1600 is useful when packets are small,
++ * but would means that jumbo frame RX queues would need more
++ * descriptors pushing */
++ falcon_nic_set_rx_usr_buf_size(nic, FALCON_RX_USR_BUF_SIZE);
++
++ /* TXDP tweaks */
++ /* ?? bug2396 looks ok */
++ falcon_nic_tx_cfg(nic, /*unlocked(for non-UDP/TCP)= */ 0);
++ falcon_nic_pace_cfg(nic, 4, 2);
++
++ /* ?? bug2396
++ * netdriver must load first or else must RMW this register */
++ falcon_nic_rx_filter_ctl_set(nic, RX_FILTER_CTL_SRCH_LIMIT_TCP_FULL,
++ RX_FILTER_CTL_SRCH_LIMIT_TCP_WILD,
++ RX_FILTER_CTL_SRCH_LIMIT_UDP_FULL,
++ RX_FILTER_CTL_SRCH_LIMIT_UDP_WILD);
++
++ if (!(nic->flags & NIC_FLAG_NO_INTERRUPT)) {
++ rc = efhw_keventq_ctor(nic, FALCON_EVQ_CHAR,
++ &nic->interrupting_evq, ev_handlers);
++ if (rc < 0) {
++ EFHW_ERR("%s: efhw_keventq_ctor() failed (%d) evq=%d",
++ __func__, rc, FALCON_EVQ_CHAR);
++ return rc;
++ }
++ }
++ rc = efhw_keventq_ctor(nic, non_irq_evq,
++ &nic->non_interrupting_evq, NULL);
++ if (rc < 0) {
++ EFHW_ERR("%s: efhw_keventq_ctor() failed (%d) evq=%d",
++ __func__, rc, non_irq_evq);
++ return rc;
++ }
++
++ /* allocate IRQ channel */
++ rc = falcon_nic_init_irq_channel(nic, 1);
++ /* ignore failure at user-level for eftest */
++ if ((rc < 0) && !(nic->options & NIC_OPT_EFTEST))
++ return rc;
++
++ return 0;
++}
++
++/*--------------------------------------------------------------------
++ *
++ * Interrupt
++ *
++ *--------------------------------------------------------------------*/
++
++static void
++falcon_nic_interrupt_enable(struct efhw_nic *nic)
++{
++ struct efhw_keventq *q;
++ unsigned rdptr;
++
++ if (nic->flags & NIC_FLAG_NO_INTERRUPT)
++ return;
++
++ /* Enable driver interrupts */
++ EFHW_NOTICE("%s: enable master interrupt", __func__);
++ falcon_nic_interrupt_hw_enable(nic);
++
++ /* An interrupting eventq must start of day ack its read pointer */
++ q = &nic->interrupting_evq;
++ rdptr = EFHW_EVENT_OFFSET(q, q, 1) / sizeof(efhw_event_t);
++ falcon_nic_evq_ack(nic, FALCON_EVQ_CHAR, rdptr, false);
++ EFHW_NOTICE("%s: ACK evq[%d]:%x", __func__,
++ FALCON_EVQ_CHAR, rdptr);
++}
++
++static void falcon_nic_interrupt_disable(struct efhw_nic *nic)
++{
++ /* NB. No need to check for NIC_FLAG_NO_INTERRUPT, as
++ ** falcon_nic_interrupt_hw_disable() will do it. */
++ falcon_nic_interrupt_hw_disable(nic);
++}
++
++static void
++falcon_nic_set_interrupt_moderation(struct efhw_nic *nic, int evq,
++ uint32_t val)
++{
++ if (evq < 0)
++ evq = FALCON_EVQ_CHAR;
++
++ falcon_ab_timer_tbl_set(nic, evq, TIMER_MODE_INT_HLDOFF, val / 5);
++}
++
++static inline void legacy_irq_ack(struct efhw_nic *nic)
++{
++ EFHW_ASSERT(!(nic->flags & NIC_FLAG_NO_INTERRUPT));
++
++ if (!(nic->flags & NIC_FLAG_MSI)) {
++ writel(1, EFHW_KVA(nic) + INT_ACK_REG_CHAR_A1_OFST);
++ mmiowb();
++ /* ?? FIXME: We should be doing a read here to ensure IRQ is
++ * thoroughly acked before we return from ISR. */
++ }
++}
++
++static int falcon_nic_interrupt(struct efhw_nic *nic)
++{
++ uint32_t *syserr_ptr =
++ (uint32_t *) efhw_iopage_ptr(&nic->irq_iobuff);
++ int handled = 0;
++ int done_ack = 0;
++
++ EFHW_ASSERT(!(nic->flags & NIC_FLAG_NO_INTERRUPT));
++ EFHW_ASSERT(syserr_ptr);
++
++ /* FIFO fill level interrupt - just log it. */
++ if (unlikely(*(syserr_ptr + (DW0_OFST / 4)))) {
++ EFHW_WARN("%s: *** FIFO *** %x", __func__,
++ *(syserr_ptr + (DW0_OFST / 4)));
++ *(syserr_ptr + (DW0_OFST / 4)) = 0;
++ handled++;
++ }
++
++ /* Fatal interrupts. */
++ if (unlikely(*(syserr_ptr + (DW2_OFST / 4)))) {
++ *(syserr_ptr + (DW2_OFST / 4)) = 0;
++ falcon_nic_handle_fatal_int(nic);
++ handled++;
++ }
++
++ /* Event queue interrupt. For legacy interrupts we have to check
++ * that the interrupt is for us, because it could be shared. */
++ if (*(syserr_ptr + (DW1_OFST / 4))) {
++ *(syserr_ptr + (DW1_OFST / 4)) = 0;
++ /* ACK must come before callback to handler fn. */
++ legacy_irq_ack(nic);
++ done_ack = 1;
++ handled++;
++ if (nic->irq_handler)
++ nic->irq_handler(nic, 0);
++ }
++
++ if (unlikely(!done_ack)) {
++ if (!handled)
++ /* Shared interrupt line (hopefully). */
++ return 0;
++ legacy_irq_ack(nic);
++ }
++
++ EFHW_TRACE("%s: handled %d", __func__, handled);
++ return 1;
++}
++
++/*--------------------------------------------------------------------
++ *
++ * Event Management - and SW event posting
++ *
++ *--------------------------------------------------------------------*/
++
++static void
++falcon_nic_event_queue_enable(struct efhw_nic *nic, uint evq, uint evq_size,
++ dma_addr_t q_base_addr, /* not used */
++ uint buf_base_id, int interrupting)
++{
++ EFHW_ASSERT(nic);
++
++ /* Whether or not queue has an interrupt depends on
++ * instance number and h/w variant, so [interrupting] is
++ * ignored.
++ */
++ falcon_ab_timer_tbl_set(nic, evq, 0/*disable*/, 0);
++
++ falcon_nic_evq_ptr_tbl(nic, evq, 1, buf_base_id, evq_size);
++ EFHW_TRACE("%s: enable evq %u size %u", __func__, evq, evq_size);
++}
++
++static void
++falcon_nic_event_queue_disable(struct efhw_nic *nic, uint evq, int timer_only)
++{
++ EFHW_ASSERT(nic);
++
++ falcon_ab_timer_tbl_set(nic, evq, 0 /* disable */ , 0);
++
++ if (!timer_only)
++ falcon_nic_evq_ptr_tbl(nic, evq, 0, 0, 0);
++ EFHW_TRACE("%s: disenable evq %u", __func__, evq);
++}
++
++static void
++falcon_nic_wakeup_request(struct efhw_nic *nic, dma_addr_t q_base_addr,
++ int next_i, int evq)
++{
++ EFHW_ASSERT(evq > FALCON_EVQ_CHAR);
++ falcon_nic_evq_ack(nic, evq, next_i, true);
++ EFHW_TRACE("%s: evq %d next_i %d", __func__, evq, next_i);
++}
++
++static void falcon_nic_sw_event(struct efhw_nic *nic, int data, int evq)
++{
++ uint64_t ev_data = data;
++
++ ev_data &= ~FALCON_EVENT_CODE_MASK;
++ ev_data |= FALCON_EVENT_CODE_SW;
++
++ falcon_drv_ev(nic, ev_data, evq);
++ EFHW_NOTICE("%s: evq[%d]->%x", __func__, evq, data);
++}
++
++
++/*--------------------------------------------------------------------
++ *
++ * Buffer table - helpers
++ *
++ *--------------------------------------------------------------------*/
++
++#define FALCON_LAZY_COMMIT_HWM (FALCON_BUFFER_UPD_MAX - 16)
++
++/* Note re.:
++ * falcon_nic_buffer_table_lazy_commit(struct efhw_nic *nic)
++ * falcon_nic_buffer_table_update_poll(struct efhw_nic *nic)
++ * falcon_nic_buffer_table_confirm(struct efhw_nic *nic)
++ * -- these are no-ops in the user-level driver because it would need to
++ * coordinate with the real driver on the number of outstanding commits.
++ *
++ * An exception is made for eftest apps, which manage the hardware without
++ * using the char driver.
++ */
++
++static inline void falcon_nic_buffer_table_lazy_commit(struct efhw_nic *nic)
++{
++ /* Do nothing if operating in synchronous mode. */
++ if (!nic->irq_handler)
++ return;
++}
++
++static inline void falcon_nic_buffer_table_update_poll(struct efhw_nic *nic)
++{
++ FALCON_LOCK_DECL;
++ int count = 0, rc = 0;
++
++ /* We can be called here early days */
++ if (!nic->irq_handler)
++ return;
++
++ /* If we need to gather buffer update events then poll the
++ non-interrupting event queue */
++
++ /* For each _buffer_table_commit there will be an update done
++ event. We don't keep track of how many buffers each commit has
++ committed, just make sure that all the expected events have been
++ gathered */
++ FALCON_LOCK_LOCK(nic);
++
++ EFHW_TRACE("%s: %d", __func__, nic->buf_commit_outstanding);
++
++ while (nic->buf_commit_outstanding > 0) {
++ /* we're not expecting to handle any events that require
++ * upcalls into the core driver */
++ struct efhw_ev_handler handler;
++ memset(&handler, 0, sizeof(handler));
++ nic->non_interrupting_evq.ev_handlers = &handler;
++ rc = efhw_keventq_poll(nic, &nic->non_interrupting_evq);
++ nic->non_interrupting_evq.ev_handlers = NULL;
++
++ if (rc < 0) {
++ EFHW_ERR("%s: poll ERROR (%d:%d) ***** ",
++ __func__, rc,
++ nic->buf_commit_outstanding);
++ goto out;
++ }
++
++ FALCON_LOCK_UNLOCK(nic);
++
++ if (count++)
++ udelay(1);
++
++ if (count > 1000) {
++ EFHW_WARN("%s: poll Timeout ***** (%d)", __func__,
++ nic->buf_commit_outstanding);
++ nic->buf_commit_outstanding = 0;
++ return;
++ }
++ FALCON_LOCK_LOCK(nic);
++ }
++
++out:
++ FALCON_LOCK_UNLOCK(nic);
++ return;
++}
++
++void falcon_nic_buffer_table_confirm(struct efhw_nic *nic)
++{
++ /* confirm buffer table updates - should be used for items where
++ loss of data would be unacceptable. E.g for the buffers that back
++ an event or DMA queue */
++ FALCON_LOCK_DECL;
++
++ /* Do nothing if operating in synchronous mode. */
++ if (!nic->irq_handler)
++ return;
++
++ FALCON_LOCK_LOCK(nic);
++
++ _falcon_nic_buffer_table_commit(nic);
++
++ FALCON_LOCK_UNLOCK(nic);
++
++ falcon_nic_buffer_table_update_poll(nic);
++}
++
++/*--------------------------------------------------------------------
++ *
++ * Buffer table - API
++ *
++ *--------------------------------------------------------------------*/
++
++static void
++falcon_nic_buffer_table_clear(struct efhw_nic *nic, int buffer_id, int num)
++{
++ FALCON_LOCK_DECL;
++ FALCON_LOCK_LOCK(nic);
++ _falcon_nic_buffer_table_clear(nic, buffer_id, num);
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++static void
++falcon_nic_buffer_table_set(struct efhw_nic *nic, dma_addr_t dma_addr,
++ uint bufsz, uint region,
++ int own_id, int buffer_id)
++{
++ FALCON_LOCK_DECL;
++
++ EFHW_ASSERT(region < FALCON_REGION_NUM);
++
++ EFHW_ASSERT((bufsz == EFHW_4K) ||
++ (bufsz == EFHW_8K && FALCON_BUFFER_TABLE_FULL_MODE));
++
++ falcon_nic_buffer_table_update_poll(nic);
++
++ FALCON_LOCK_LOCK(nic);
++
++ _falcon_nic_buffer_table_set(nic, dma_addr, bufsz, region, own_id,
++ buffer_id);
++
++ falcon_nic_buffer_table_lazy_commit(nic);
++
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++void
++falcon_nic_buffer_table_set_n(struct efhw_nic *nic, int buffer_id,
++ dma_addr_t dma_addr, uint bufsz, uint region,
++ int n_pages, int own_id)
++{
++ /* used to set up a contiguous range of buffers */
++ FALCON_LOCK_DECL;
++
++ EFHW_ASSERT(region < FALCON_REGION_NUM);
++
++ EFHW_ASSERT((bufsz == EFHW_4K) ||
++ (bufsz == EFHW_8K && FALCON_BUFFER_TABLE_FULL_MODE));
++
++ while (n_pages--) {
++
++ falcon_nic_buffer_table_update_poll(nic);
++
++ FALCON_LOCK_LOCK(nic);
++
++ _falcon_nic_buffer_table_set(nic, dma_addr, bufsz, region,
++ own_id, buffer_id++);
++
++ falcon_nic_buffer_table_lazy_commit(nic);
++
++ FALCON_LOCK_UNLOCK(nic);
++
++ dma_addr += bufsz;
++ }
++}
++
++/*--------------------------------------------------------------------
++ *
++ * DMA Queues - mid level API
++ *
++ *--------------------------------------------------------------------*/
++
++#if BUG5302_WORKAROUND
++
++/* Tx queues can get stuck if the software write pointer is set to an index
++ * beyond the configured size of the queue, such that they will not flush.
++ * This code can be run before attempting a flush; it will detect the bogus
++ * value and reset it. This fixes most instances of this problem, although
++ * sometimes it does not work, or we may not detect it in the first place,
++ * if the out-of-range value was replaced by an in-range value earlier.
++ * (In those cases we have to apply a bigger hammer later, if we see that
++ * the queue is still not flushing.)
++ */
++static void
++falcon_check_for_bogus_tx_dma_wptr(struct efhw_nic *nic, uint dmaq)
++{
++ FALCON_LOCK_DECL;
++ uint64_t val_low64, val_high64;
++ uint64_t size, hwptr, swptr, val;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ ulong offset = falcon_dma_tx_q_offset(nic, dmaq);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_read_qq(efhw_kva + offset, &val_low64, &val_high64);
++ FALCON_LOCK_UNLOCK(nic);
++
++ size = (val_low64 >> TX_DESCQ_SIZE_LBN)
++ & __FALCON_MASK64(TX_DESCQ_SIZE_WIDTH);
++ size = (1 << size) * 512;
++ hwptr = (val_high64 >> __DW3(TX_DESCQ_HW_RPTR_LBN))
++ & __FALCON_MASK64(TX_DESCQ_HW_RPTR_WIDTH);
++ swptr = (val_low64 >> TX_DESCQ_SW_WPTR_LBN)
++ & __FALCON_MASK64(__LW2(TX_DESCQ_SW_WPTR_LBN));
++ val = (val_high64)
++ &
++ __FALCON_MASK64(__DW3
++ (TX_DESCQ_SW_WPTR_LBN + TX_DESCQ_SW_WPTR_WIDTH));
++ val = val << __LW2(TX_DESCQ_SW_WPTR_LBN);
++ swptr = swptr | val;
++
++ if (swptr >= size) {
++ EFHW_WARN("Resetting bad write pointer for TXQ[%d]", dmaq);
++ writel((uint32_t) ((hwptr + 0) & (size - 1)),
++ efhw_kva + falcon_tx_dma_page_addr(dmaq) + 12);
++ mmiowb();
++ }
++}
++
++/* Here's that "bigger hammer": we reset all the pointers (hardware read,
++ * hardware descriptor cache read, software write) to zero.
++ */
++void falcon_clobber_tx_dma_ptrs(struct efhw_nic *nic, uint dmaq)
++{
++ FALCON_LOCK_DECL;
++ uint64_t val_low64, val_high64;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ ulong offset = falcon_dma_tx_q_offset(nic, dmaq);
++
++ EFHW_WARN("Recovering stuck TXQ[%d]", dmaq);
++ FALCON_LOCK_LOCK(nic);
++ falcon_read_qq(efhw_kva + offset, &val_low64, &val_high64);
++ val_high64 &= ~(__FALCON_MASK64(TX_DESCQ_HW_RPTR_WIDTH)
++ << __DW3(TX_DESCQ_HW_RPTR_LBN));
++ val_high64 &= ~(__FALCON_MASK64(TX_DC_HW_RPTR_WIDTH)
++ << __DW3(TX_DC_HW_RPTR_LBN));
++ falcon_write_qq(efhw_kva + offset, val_low64, val_high64);
++ mmiowb();
++ writel(0, efhw_kva + falcon_tx_dma_page_addr(dmaq) + 12);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++#endif
++
++static inline int
++__falcon_really_flush_tx_dma_channel(struct efhw_nic *nic, uint dmaq)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ uint val;
++
++ EFHW_BUILD_ASSERT(TX_FLUSH_DESCQ_REG_KER_OFST ==
++ TX_FLUSH_DESCQ_REG_OFST);
++
++ __DWCHCK(TX_FLUSH_DESCQ_CMD_LBN, TX_FLUSH_DESCQ_CMD_WIDTH);
++ __DWCHCK(TX_FLUSH_DESCQ_LBN, TX_FLUSH_DESCQ_WIDTH);
++ __RANGECHCK(dmaq, TX_FLUSH_DESCQ_WIDTH);
++
++ val = ((1 << TX_FLUSH_DESCQ_CMD_LBN) | (dmaq << TX_FLUSH_DESCQ_LBN));
++
++ EFHW_TRACE("TX DMA flush[%d]", dmaq);
++
++#if BUG5302_WORKAROUND
++ falcon_check_for_bogus_tx_dma_wptr(nic, dmaq);
++#endif
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + TX_FLUSH_DESCQ_REG_OFST,
++ val, FALCON_ATOMIC_TX_FLUSH_DESCQ);
++
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++ return 0;
++}
++
++static inline int
++__falcon_is_tx_dma_channel_flushed(struct efhw_nic *nic, uint dmaq)
++{
++ FALCON_LOCK_DECL;
++ uint64_t val_low64, val_high64;
++ uint64_t enable, flush_pending;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ ulong offset = falcon_dma_tx_q_offset(nic, dmaq);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_read_qq(efhw_kva + offset, &val_low64, &val_high64);
++ FALCON_LOCK_UNLOCK(nic);
++
++ /* should see one of three values for these 2 bits
++ * 1, queue enabled no flush pending
++ * - i.e. first flush request
++ * 2, queue enabled, flush pending
++ * - i.e. request to reflush before flush finished
++ * 3, queue disabled (no flush pending)
++ * - flush complete
++ */
++ __DWCHCK(TX_DESCQ_FLUSH_LBN, TX_DESCQ_FLUSH_WIDTH);
++ __DW3CHCK(TX_DESCQ_EN_LBN, TX_DESCQ_EN_WIDTH);
++ enable = val_high64 & (1 << __DW3(TX_DESCQ_EN_LBN));
++ flush_pending = val_low64 & (1 << TX_DESCQ_FLUSH_LBN);
++
++ if (enable && !flush_pending)
++ return 0;
++
++ EFHW_TRACE("%d, %s: %s, %sflush pending", dmaq, __func__,
++ enable ? "enabled" : "disabled",
++ flush_pending ? "" : "NO ");
++ /* still in progress */
++ if (enable && flush_pending)
++ return -EALREADY;
++
++ return -EAGAIN;
++}
++
++static int falcon_flush_tx_dma_channel(struct efhw_nic *nic, uint dmaq)
++{
++ int rc;
++ rc = __falcon_is_tx_dma_channel_flushed(nic, dmaq);
++ if (rc < 0) {
++ EFHW_WARN("%s: failed %d", __func__, rc);
++ return rc;
++ }
++ return __falcon_really_flush_tx_dma_channel(nic, dmaq);
++}
++
++static int
++__falcon_really_flush_rx_dma_channel(struct efhw_nic *nic, uint dmaq)
++{
++ FALCON_LOCK_DECL;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ uint val;
++
++ EFHW_BUILD_ASSERT(RX_FLUSH_DESCQ_REG_KER_OFST ==
++ RX_FLUSH_DESCQ_REG_OFST);
++
++ __DWCHCK(RX_FLUSH_DESCQ_CMD_LBN, RX_FLUSH_DESCQ_CMD_WIDTH);
++ __DWCHCK(RX_FLUSH_DESCQ_LBN, RX_FLUSH_DESCQ_WIDTH);
++ __RANGECHCK(dmaq, RX_FLUSH_DESCQ_WIDTH);
++
++ val = ((1 << RX_FLUSH_DESCQ_CMD_LBN) | (dmaq << RX_FLUSH_DESCQ_LBN));
++
++ EFHW_TRACE("RX DMA flush[%d]", dmaq);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_write_qq(efhw_kva + RX_FLUSH_DESCQ_REG_OFST, val,
++ FALCON_ATOMIC_RX_FLUSH_DESCQ);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++ return 0;
++}
++
++static inline int
++__falcon_is_rx_dma_channel_flushed(struct efhw_nic *nic, uint dmaq)
++{
++ FALCON_LOCK_DECL;
++ uint64_t val;
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ ulong offset = falcon_dma_rx_q_offset(nic, dmaq);
++
++ /* Falcon requires 128 bit atomic access for this register */
++ FALCON_LOCK_LOCK(nic);
++ falcon_read_q(efhw_kva + offset, &val);
++ FALCON_LOCK_UNLOCK(nic);
++
++ __DWCHCK(RX_DESCQ_EN_LBN, RX_DESCQ_EN_WIDTH);
++
++ /* is it enabled? */
++ return (val & (1 << RX_DESCQ_EN_LBN))
++ ? 0 : -EAGAIN;
++}
++
++static int falcon_flush_rx_dma_channel(struct efhw_nic *nic, uint dmaq)
++{
++ int rc;
++ rc = __falcon_is_rx_dma_channel_flushed(nic, dmaq);
++ if (rc < 0) {
++ EFHW_ERR("%s: failed %d", __func__, rc);
++ return rc;
++ }
++ return __falcon_really_flush_rx_dma_channel(nic, dmaq);
++}
++
++/*--------------------------------------------------------------------
++ *
++ * Falcon specific event callbacks
++ *
++ *--------------------------------------------------------------------*/
++
++int
++falcon_handle_char_event(struct efhw_nic *nic, struct efhw_ev_handler *h,
++ efhw_event_t *ev)
++{
++ EFHW_TRACE("DRIVER EVENT: "FALCON_EVENT_FMT,
++ FALCON_EVENT_PRI_ARG(*ev));
++
++ switch (FALCON_EVENT_DRIVER_SUBCODE(ev)) {
++
++ case TX_DESCQ_FLS_DONE_EV_DECODE:
++ EFHW_TRACE("TX[%d] flushed",
++ (int)FALCON_EVENT_TX_FLUSH_Q_ID(ev));
++ efhw_handle_txdmaq_flushed(nic, h, ev);
++ break;
++
++ case RX_DESCQ_FLS_DONE_EV_DECODE:
++ EFHW_TRACE("RX[%d] flushed",
++ (int)FALCON_EVENT_TX_FLUSH_Q_ID(ev));
++ efhw_handle_rxdmaq_flushed(nic, h, ev);
++ break;
++
++ case SRM_UPD_DONE_EV_DECODE:
++ nic->buf_commit_outstanding =
++ max(0, nic->buf_commit_outstanding - 1);
++ EFHW_TRACE("COMMIT DONE %d", nic->buf_commit_outstanding);
++ break;
++
++ case EVQ_INIT_DONE_EV_DECODE:
++ EFHW_TRACE("%sEVQ INIT", "");
++ break;
++
++ case WAKE_UP_EV_DECODE:
++ EFHW_TRACE("%sWAKE UP", "");
++ efhw_handle_wakeup_event(nic, h, ev);
++ break;
++
++ case TIMER_EV_DECODE:
++ EFHW_TRACE("%sTIMER", "");
++ efhw_handle_timeout_event(nic, h, ev);
++ break;
++
++ case RX_DESCQ_FLSFF_OVFL_EV_DECODE:
++ /* This shouldn't happen. */
++ EFHW_ERR("%s: RX flush fifo overflowed", __func__);
++ return -EINVAL;
++
++ default:
++ EFHW_TRACE("UNKOWN DRIVER EVENT: " FALCON_EVENT_FMT,
++ FALCON_EVENT_PRI_ARG(*ev));
++ break;
++ }
++ return 0;
++}
++
++
++/*--------------------------------------------------------------------
++ *
++ * Filter search depth control
++ *
++ *--------------------------------------------------------------------*/
++
++
++#define Q0_READ(q0, name) \
++ ((unsigned)(((q0) >> name##_LBN) & (__FALCON_MASK64(name##_WIDTH))))
++#define Q0_MASK(name) \
++ ((__FALCON_MASK64(name##_WIDTH)) << name##_LBN)
++#define Q0_VALUE(name, value) \
++ (((uint64_t)(value)) << name##_LBN)
++
++#define Q1_READ(q1, name) \
++ ((unsigned)(((q1) >> (name##_LBN - 64)) & \
++ (__FALCON_MASK64(name##_WIDTH))))
++#define Q1_MASK(name) \
++ ((__FALCON_MASK64(name##_WIDTH)) << (name##_LBN - 64))
++#define Q1_VALUE(name, value) \
++ (((uint64_t)(value)) << (name##_LBN - 64))
++
++
++void
++falcon_nic_get_rx_filter_search_limits(struct efhw_nic *nic,
++ struct efhw_filter_search_limits *lim,
++ int use_raw_values)
++{
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ FALCON_LOCK_DECL;
++ uint64_t q0, q1;
++ unsigned ff = (use_raw_values ? 0 : RX_FILTER_CTL_SRCH_FUDGE_FULL);
++ unsigned wf = (use_raw_values ? 0 : RX_FILTER_CTL_SRCH_FUDGE_WILD);
++
++ FALCON_LOCK_LOCK(nic);
++ falcon_read_qq(efhw_kva + RX_FILTER_CTL_REG_OFST, &q0, &q1);
++ FALCON_LOCK_UNLOCK(nic);
++
++ lim->tcp_full = Q0_READ(q0, TCP_FULL_SRCH_LIMIT) - ff;
++ lim->tcp_wild = Q0_READ(q0, TCP_WILD_SRCH_LIMIT) - wf;
++ lim->udp_full = Q0_READ(q0, UDP_FULL_SRCH_LIMIT) - ff;
++ lim->udp_wild = Q0_READ(q0, UDP_WILD_SRCH_LIMIT) - wf;
++}
++EXPORT_SYMBOL(falcon_nic_get_rx_filter_search_limits);
++
++
++void
++falcon_nic_set_rx_filter_search_limits(struct efhw_nic *nic,
++ struct efhw_filter_search_limits *lim,
++ int use_raw_values)
++{
++ volatile char __iomem *efhw_kva = EFHW_KVA(nic);
++ FALCON_LOCK_DECL;
++ uint64_t q0, q1;
++ unsigned ff = (use_raw_values ? 0 : RX_FILTER_CTL_SRCH_FUDGE_FULL);
++ unsigned wf = (use_raw_values ? 0 : RX_FILTER_CTL_SRCH_FUDGE_WILD);
++
++ FALCON_LOCK_LOCK(nic);
++ falcon_read_qq(efhw_kva + RX_FILTER_CTL_REG_OFST, &q0, &q1);
++
++ q0 &= ~Q0_MASK(TCP_FULL_SRCH_LIMIT);
++ q0 &= ~Q0_MASK(TCP_WILD_SRCH_LIMIT);
++ q0 &= ~Q0_MASK(UDP_FULL_SRCH_LIMIT);
++ q0 &= ~Q0_MASK(UDP_WILD_SRCH_LIMIT);
++ q0 |= Q0_VALUE(TCP_FULL_SRCH_LIMIT, lim->tcp_full + ff);
++ q0 |= Q0_VALUE(TCP_WILD_SRCH_LIMIT, lim->tcp_wild + wf);
++ q0 |= Q0_VALUE(UDP_FULL_SRCH_LIMIT, lim->udp_full + ff);
++ q0 |= Q0_VALUE(UDP_WILD_SRCH_LIMIT, lim->udp_wild + wf);
++ nic->tcp_full_srch.max = lim->tcp_full + ff
++ - RX_FILTER_CTL_SRCH_FUDGE_FULL;
++ nic->tcp_wild_srch.max = lim->tcp_wild + wf
++ - RX_FILTER_CTL_SRCH_FUDGE_WILD;
++ nic->udp_full_srch.max = lim->udp_full + ff
++ - RX_FILTER_CTL_SRCH_FUDGE_FULL;
++ nic->udp_wild_srch.max = lim->udp_wild + wf
++ - RX_FILTER_CTL_SRCH_FUDGE_WILD;
++
++ falcon_write_qq(efhw_kva + RX_FILTER_CTL_REG_OFST, q0, q1);
++ mmiowb();
++ FALCON_LOCK_UNLOCK(nic);
++}
++EXPORT_SYMBOL(falcon_nic_set_rx_filter_search_limits);
++
++
++#undef READ_Q0
++#undef Q0_MASK
++#undef Q0_VALUE
++#undef READ_Q1
++#undef Q1_MASK
++#undef Q1_VALUE
++
++
++/*--------------------------------------------------------------------
++ *
++ * New unified filter API
++ *
++ *--------------------------------------------------------------------*/
++
++
++#if FALCON_FULL_FILTER_CACHE
++static inline struct efhw_filter_spec *
++filter_spec_cache_entry(struct efhw_nic *nic, int filter_idx)
++{
++ EFHW_ASSERT(nic->filter_spec_cache);
++ return &nic->filter_spec_cache[FALCON_FILTER_TBL_NUM + filter_idx];
++}
++#endif
++
++
++static int filter_is_active(struct efhw_nic *nic, int filter_idx)
++{
++ return nic->filter_in_use[filter_idx];
++}
++
++
++static void set_filter_cache_entry(struct efhw_nic *nic,
++ struct efhw_filter_spec *spec,
++ int filter_idx)
++{
++ nic->filter_in_use[filter_idx] = 1;
++#if FALCON_FULL_FILTER_CACHE
++ memcpy(filter_spec_cache_entry(nic, filter_idx), spec,
++ sizeof(struct efhw_filter_spec));
++#endif
++}
++
++
++static void clear_filter_cache_entry(struct efhw_nic *nic,
++ int filter_idx)
++{
++ nic->filter_in_use[filter_idx] = 0;
++#if FALCON_FULL_FILTER_CACHE
++ memset(filter_spec_cache_entry(nic, filter_idx), 0,
++ sizeof(struct efhw_filter_spec));
++#endif
++}
++
++
++#if FALCON_FULL_FILTER_CACHE
++static int filter_is_duplicate(struct efhw_nic *nic,
++ struct efhw_filter_spec *spec, int filter_idx)
++{
++ struct efhw_filter_spec *cmp;
++
++ cmp = filter_spec_cache_entry(nic, filter_idx);
++
++ EFHW_ASSERT(filter_is_active(nic, filter_idx));
++
++ return (spec->saddr_le32 == cmp->saddr_le32) &&
++ (spec->daddr_le32 == cmp->daddr_le32) &&
++ (spec->sport_le16 == cmp->sport_le16) &&
++ (spec->dport_le16 == cmp->dport_le16) &&
++ (spec->tcp == cmp->tcp) &&
++ (spec->full == cmp->full);
++}
++#endif
++
++
++static void common_build_ip_filter(struct efhw_nic *nic, int tcp, int full,
++ int rss, int scatter, uint dmaq_id,
++ unsigned saddr_le32, unsigned sport_le16,
++ unsigned daddr_le32, unsigned dport_le16,
++ uint64_t *q0, uint64_t *q1)
++{
++ uint64_t v1, v2, v3, v4;
++ unsigned tmp_port_le16;
++
++ if (!full) {
++ saddr_le32 = 0;
++ sport_le16 = 0;
++ if (!tcp) {
++ tmp_port_le16 = sport_le16;
++ sport_le16 = dport_le16;
++ dport_le16 = tmp_port_le16;
++ }
++ }
++
++ v4 = (((!tcp) << __DW4(TCP_UDP_0_LBN)) |
++ (dmaq_id << __DW4(RXQ_ID_0_LBN)));
++
++ switch (nic->devtype.variant) {
++ case 'A':
++ EFHW_ASSERT(!rss);
++ break;
++ case 'B':
++ v4 |= scatter << __DW4(SCATTER_EN_0_B0_LBN);
++ v4 |= rss << __DW4(RSS_EN_0_B0_LBN);
++ break;
++ default:
++ EFHW_ASSERT(0);
++ break;
++ }
++
++ v3 = daddr_le32;
++ v2 = ((dport_le16 << __DW2(DEST_PORT_TCP_0_LBN)) |
++ (__HIGH(saddr_le32, SRC_IP_0_LBN, SRC_IP_0_WIDTH)));
++ v1 = ((__LOW(saddr_le32, SRC_IP_0_LBN, SRC_IP_0_WIDTH)) |
++ (sport_le16 << SRC_TCP_DEST_UDP_0_LBN));
++
++ *q0 = (v2 << 32) | v1;
++ *q1 = (v4 << 32) | v3;
++}
++
++
++static void build_filter(struct efhw_nic *nic, struct efhw_filter_spec *spec,
++ unsigned *key, unsigned *tbl_size,
++ struct efhw_filter_depth **depth,
++ uint64_t *q0, uint64_t *q1)
++{
++ *key = falcon_hash_get_ip_key(spec->saddr_le32,
++ spec->sport_le16,
++ spec->daddr_le32,
++ spec->dport_le16,
++ spec->tcp,
++ spec->full);
++ *tbl_size = nic->ip_filter_tbl_size;
++ if (spec->tcp && spec->full)
++ *depth = &nic->tcp_full_srch;
++ else if (spec->tcp && !spec->full)
++ *depth = &nic->tcp_wild_srch;
++ else if (!spec->tcp && spec->full)
++ *depth = &nic->udp_full_srch;
++ else
++ *depth = &nic->udp_wild_srch;
++ common_build_ip_filter(nic, spec->tcp, spec->full,
++ spec->rss, spec->scatter,
++ spec->dmaq_id,
++ spec->saddr_le32,
++ spec->sport_le16,
++ spec->daddr_le32,
++ spec->dport_le16,
++ q0, q1);
++}
++
++
++#if FALCON_VERIFY_FILTERS
++static void verify_filters(struct efhw_nic *nic)
++{
++ unsigned table_offset, table_stride;
++ unsigned i, dummy_key, dummy_tbl_size;
++ struct efhw_filter_depth *dummy_depth;
++ unsigned filter_tbl_size;
++ struct efhw_filter_spec *spec;
++ uint64_t q0_expect, q1_expect, q0_got, q1_got;
++
++ filter_tbl_size = nic->ip_filter_tbl_size;
++ table_offset = RX_FILTER_TBL0_OFST;
++ table_stride = 2 * FALCON_REGISTER128;
++
++ for (i = 0; i < filter_tbl_size; i++) {
++ if (!filter_is_active(nic, type, i))
++ continue;
++
++ spec = filter_spec_cache_entry(nic, type, i);
++
++ build_filter(nic, spec, &dummy_key, &dummy_tbl_size,
++ &dummy_depth, &q0_expect, &q1_expect);
++
++ falcon_read_qq(EFHW_KVA(nic) + table_offset + i * table_stride,
++ &q0_got, &q1_got);
++
++ if ((q0_got != q0_expect) || (q1_got != q1_expect)) {
++ falcon_write_qq(EFHW_KVA(nic) + 0x300,
++ q0_got, q1_got);
++ EFHW_ERR("ERROR: RX-filter[%d][%d] was "
++ "%"PRIx64":%" PRIx64" expected "
++ "%"PRIx64":%"PRIx64,
++ nic->index, i, q0_got, q1_got,
++ q0_expect, q1_expect);
++ }
++ }
++}
++#endif
++
++
++static void write_filter_table_entry(struct efhw_nic *nic,
++ unsigned filter_idx,
++ uint64_t q0, uint64_t q1)
++{
++ unsigned table_offset, table_stride, offset;
++
++ EFHW_ASSERT(filter_idx < nic->ip_filter_tbl_size);
++ table_offset = RX_FILTER_TBL0_OFST;
++ table_stride = 2 * FALCON_REGISTER128;
++
++ offset = table_offset + filter_idx * table_stride;
++ falcon_write_qq(EFHW_KVA(nic) + offset, q0, q1);
++ mmiowb();
++
++#if FALCON_VERIFY_FILTERS
++ {
++ uint64_t q0read, q1read;
++
++ /* Read a different entry first - ensure BIU flushed shadow */
++ falcon_read_qq(EFHW_KVA(nic) + offset + 0x10, &q0read, &q1read);
++ falcon_read_qq(EFHW_KVA(nic) + offset, &q0read, &q1read);
++ EFHW_ASSERT(q0read == q0);
++ EFHW_ASSERT(q1read == q1);
++
++ verify_filters(nic, type);
++ }
++#endif
++}
++
++
++static int falcon_nic_filter_set(struct efhw_nic *nic,
++ struct efhw_filter_spec *spec,
++ int *filter_idx_out)
++{
++ FALCON_LOCK_DECL;
++ unsigned key = 0, tbl_size = 0, hash1, hash2, k;
++ struct efhw_filter_depth *depth = NULL;
++ int filter_idx = -1;
++ int rc = 0;
++ uint64_t q0, q1;
++
++ build_filter(nic, spec, &key, &tbl_size, &depth, &q0, &q1);
++
++ if (tbl_size == 0)
++ return -EINVAL;
++
++ EFHW_TRACE("%s: depth->max=%d", __func__, depth->max);
++
++ hash1 = falcon_hash_function1(key, tbl_size);
++ hash2 = falcon_hash_function2(key, tbl_size);
++
++ FALCON_LOCK_LOCK(nic);
++
++ for (k = 0; k < depth->max; k++) {
++ filter_idx = falcon_hash_iterator(hash1, hash2, k, tbl_size);
++ if (!filter_is_active(nic, filter_idx))
++ break;
++#if FALCON_FULL_FILTER_CACHE
++ if (filter_is_duplicate(nic, spec, filter_idx)) {
++ EFHW_WARN("%s: ERROR: duplicate filter (disabling "
++ "interrupts)", __func__);
++ falcon_nic_interrupt_hw_disable(nic);
++ rc = -EINVAL;
++ goto fail1;
++ }
++#endif
++ }
++ if (k == depth->max) {
++ rc = -EADDRINUSE;
++ filter_idx = -1;
++ goto fail1;
++ } else if (depth->needed < (k + 1)) {
++ depth->needed = k + 1;
++ }
++
++ EFHW_ASSERT(filter_idx < (int)tbl_size);
++
++ set_filter_cache_entry(nic, spec, filter_idx);
++ write_filter_table_entry(nic, filter_idx, q0, q1);
++
++ ++nic->ip_filter_tbl_used;
++
++ *filter_idx_out = filter_idx;
++
++ EFHW_TRACE("%s: filter index %d rxq %u set in %u",
++ __func__, filter_idx, spec->dmaq_id, k);
++
++fail1:
++ FALCON_LOCK_UNLOCK(nic);
++ return rc;
++}
++
++
++static void falcon_nic_filter_clear(struct efhw_nic *nic,
++ int filter_idx)
++{
++ FALCON_LOCK_DECL;
++
++ if (filter_idx < 0)
++ return;
++
++ FALCON_LOCK_LOCK(nic);
++ if (filter_is_active(nic, filter_idx)) {
++ if (--nic->ip_filter_tbl_used == 0) {
++ nic->tcp_full_srch.needed = 0;
++ nic->tcp_wild_srch.needed = 0;
++ nic->udp_full_srch.needed = 0;
++ nic->udp_wild_srch.needed = 0;
++ }
++ }
++ clear_filter_cache_entry(nic, filter_idx);
++ write_filter_table_entry(nic, filter_idx, 0, 0);
++ FALCON_LOCK_UNLOCK(nic);
++}
++
++
++int
++falcon_nic_filter_ctor(struct efhw_nic *nic)
++{
++ nic->ip_filter_tbl_size = 8 * 1024;
++ nic->ip_filter_tbl_used = 0;
++
++ nic->tcp_full_srch.needed = 0;
++ nic->tcp_full_srch.max = RX_FILTER_CTL_SRCH_LIMIT_TCP_FULL
++ - RX_FILTER_CTL_SRCH_FUDGE_FULL;
++ nic->tcp_wild_srch.needed = 0;
++ nic->tcp_wild_srch.max = RX_FILTER_CTL_SRCH_LIMIT_TCP_WILD
++ - RX_FILTER_CTL_SRCH_FUDGE_WILD;
++ nic->udp_full_srch.needed = 0;
++ nic->udp_full_srch.max = RX_FILTER_CTL_SRCH_LIMIT_UDP_FULL
++ - RX_FILTER_CTL_SRCH_FUDGE_FULL;
++ nic->udp_wild_srch.needed = 0;
++ nic->udp_wild_srch.max = RX_FILTER_CTL_SRCH_LIMIT_UDP_WILD
++ - RX_FILTER_CTL_SRCH_FUDGE_WILD;
++
++ nic->filter_in_use = vmalloc(FALCON_FILTER_TBL_NUM);
++ if (nic->filter_in_use == NULL)
++ return -ENOMEM;
++ memset(nic->filter_in_use, 0, FALCON_FILTER_TBL_NUM);
++#if FALCON_FULL_FILTER_CACHE
++ nic->filter_spec_cache = vmalloc(FALCON_FILTER_TBL_NUM
++ * sizeof(struct efhw_filter_spec));
++ if (nic->filter_spec_cache == NULL)
++ return -ENOMEM;
++ memset(nic->filter_spec_cache, 0, FALCON_FILTER_TBL_NUM
++ * sizeof(struct efhw_filter_spec));
++#endif
++
++ return 0;
++}
++
++
++void
++falcon_nic_filter_dtor(struct efhw_nic *nic)
++{
++#if FALCON_FULL_FILTER_CACHE
++ if (nic->filter_spec_cache)
++ vfree(nic->filter_spec_cache);
++#endif
++ if (nic->filter_in_use)
++ vfree(nic->filter_in_use);
++}
++
++
++/*--------------------------------------------------------------------
++ *
++ * Compatibility with old filter API
++ *
++ *--------------------------------------------------------------------*/
++
++void
++falcon_nic_rx_filter_ctl_get(struct efhw_nic *nic, uint32_t *tcp_full,
++ uint32_t *tcp_wild,
++ uint32_t *udp_full, uint32_t *udp_wild)
++{
++ struct efhw_filter_search_limits lim;
++
++ falcon_nic_get_rx_filter_search_limits(nic, &lim, 0);
++ *tcp_full = (uint32_t)lim.tcp_full;
++ *tcp_wild = (uint32_t)lim.tcp_wild;
++ *udp_full = (uint32_t)lim.udp_full;
++ *udp_wild = (uint32_t)lim.udp_wild;
++}
++EXPORT_SYMBOL(falcon_nic_rx_filter_ctl_get);
++
++
++void
++falcon_nic_rx_filter_ctl_set(struct efhw_nic *nic, uint32_t tcp_full,
++ uint32_t tcp_wild,
++ uint32_t udp_full, uint32_t udp_wild)
++{
++ struct efhw_filter_search_limits lim;
++
++ lim.tcp_full = (unsigned)tcp_full;
++ lim.tcp_wild = (unsigned)tcp_wild;
++ lim.udp_full = (unsigned)udp_full;
++ lim.udp_wild = (unsigned)udp_wild;
++ falcon_nic_set_rx_filter_search_limits(nic, &lim, 0);
++}
++EXPORT_SYMBOL(falcon_nic_rx_filter_ctl_set);
++
++
++static int
++falcon_nic_ipfilter_set(struct efhw_nic *nic, int type, int *_filter_idx,
++ int dmaq,
++ unsigned saddr_be32, unsigned sport_be16,
++ unsigned daddr_be32, unsigned dport_be16)
++{
++ struct efhw_filter_spec spec;
++
++ spec.dmaq_id = dmaq;
++ spec.saddr_le32 = ntohl(saddr_be32);
++ spec.daddr_le32 = ntohl(daddr_be32);
++ spec.sport_le16 = ntohs((unsigned short) sport_be16);
++ spec.dport_le16 = ntohs((unsigned short) dport_be16);
++ spec.tcp = ((type & EFHW_IP_FILTER_TYPE_TCP_MASK) != 0);
++ spec.full = ((type & EFHW_IP_FILTER_TYPE_FULL_MASK) != 0);
++ spec.rss = ((type & EFHW_IP_FILTER_TYPE_RSS_B0_MASK) != 0);
++ spec.scatter = ((type & EFHW_IP_FILTER_TYPE_NOSCAT_B0_MASK) == 0);
++ return falcon_nic_filter_set(nic, &spec, _filter_idx);
++}
++
++static void falcon_nic_ipfilter_clear(struct efhw_nic *nic, int filter_idx)
++{
++ falcon_nic_filter_clear(nic, filter_idx);
++}
++
++
++/*--------------------------------------------------------------------
++ *
++ * Abstraction Layer Hooks
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_func_ops falcon_char_functional_units = {
++ falcon_nic_close_hardware,
++ falcon_nic_init_hardware,
++ falcon_nic_interrupt,
++ falcon_nic_interrupt_enable,
++ falcon_nic_interrupt_disable,
++ falcon_nic_set_interrupt_moderation,
++ falcon_nic_event_queue_enable,
++ falcon_nic_event_queue_disable,
++ falcon_nic_wakeup_request,
++ falcon_nic_sw_event,
++ falcon_nic_ipfilter_set,
++ falcon_nic_ipfilter_clear,
++ falcon_dmaq_tx_q_init,
++ falcon_dmaq_rx_q_init,
++ falcon_dmaq_tx_q_disable,
++ falcon_dmaq_rx_q_disable,
++ falcon_flush_tx_dma_channel,
++ falcon_flush_rx_dma_channel,
++ falcon_nic_buffer_table_set,
++ falcon_nic_buffer_table_set_n,
++ falcon_nic_buffer_table_clear,
++ falcon_nic_buffer_table_commit,
++ falcon_nic_filter_set,
++ falcon_nic_filter_clear,
++};
++
++
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/falcon_hash.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/falcon_hash.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,159 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains EtherFabric NIC hash algorithms implementation.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efhw/debug.h>
++#include <ci/driver/efab/hardware.h>
++
++
++static unsigned int
++common_get_ip_key(unsigned int src_ip, unsigned int src_port,
++ unsigned int dest_ip, unsigned int dest_port,
++ int tcp, int full, int tx, unsigned int masked_q_id)
++{
++
++ unsigned int tmp_port, result;
++
++ EFHW_ASSERT(tcp == 0 || tcp == 1);
++ EFHW_ASSERT(full == 0 || full == 1);
++ EFHW_ASSERT(masked_q_id < (1 << 10));
++
++ /* m=masked_q_id(TX)/0(RX) u=UDP S,D=src/dest addr s,d=src/dest port
++ *
++ * Wildcard filters have src(TX)/dest(RX) addr and port = 0;
++ * and UDP wildcard filters have the src and dest port fields swapped.
++ *
++ * Addr/port fields are little-endian.
++ *
++ * 3322222222221111111111
++ * 10987654321098765432109876543210
++ *
++ * 000000000000000000000mmmmmmmmmmu ^
++ * DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD ^
++ * ddddddddddddddddSSSSSSSSSSSSSSSS ^
++ * SSSSSSSSSSSSSSSSssssssssssssssss
++ */
++
++ if (!tx)
++ masked_q_id = 0;
++
++ if (!full) {
++ if (tx) {
++ dest_ip = 0;
++ dest_port = 0;
++ } else {
++ src_ip = 0;
++ src_port = 0;
++ }
++ if (!tcp) {
++ tmp_port = src_port;
++ src_port = dest_port;
++ dest_port = tmp_port;
++ }
++ }
++
++ result = ((masked_q_id << 1) | (!tcp)) ^
++ (dest_ip) ^
++ (((dest_port & 0xffff) << 16) | ((src_ip >> 16) & 0xffff)) ^
++ (((src_ip & 0xffff) << 16) | (src_port & 0xffff));
++
++ EFHW_TRACE("%s: IP %s %s %x", __func__, tcp ? "TCP" : "UDP",
++ full ? "Full" : "Wildcard", result);
++
++ return result;
++}
++
++
++unsigned int
++falcon_hash_get_ip_key(unsigned int src_ip, unsigned int src_port,
++ unsigned int dest_ip, unsigned int dest_port,
++ int tcp, int full)
++{
++ return common_get_ip_key(src_ip, src_port, dest_ip, dest_port, tcp,
++ full, 0, 0);
++}
++
++
++/* This function generates the First Hash key */
++unsigned int falcon_hash_function1(unsigned int key, unsigned int nfilters)
++{
++
++ unsigned short int lfsr_reg;
++ unsigned int tmp_key;
++ int index;
++
++ unsigned short int lfsr_input;
++ unsigned short int single_bit_key;
++ unsigned short int bit16_lfsr;
++ unsigned short int bit3_lfsr;
++
++ lfsr_reg = 0xFFFF;
++ tmp_key = key;
++
++ /* For Polynomial equation X^16+X^3+1 */
++ for (index = 0; index < 32; index++) {
++ /* Get the bit from key and shift the key */
++ single_bit_key = (tmp_key & 0x80000000) >> 31;
++ tmp_key = tmp_key << 1;
++
++ /* get the Tap bits to XOR operation */
++ bit16_lfsr = (lfsr_reg & 0x8000) >> 15;
++ bit3_lfsr = (lfsr_reg & 0x0004) >> 2;
++
++ /* Get the Input value to the LFSR */
++ lfsr_input = ((bit16_lfsr ^ bit3_lfsr) ^ single_bit_key);
++
++ /* Shift and store out of the two TAPs */
++ lfsr_reg = lfsr_reg << 1;
++ lfsr_reg = lfsr_reg | (lfsr_input & 0x0001);
++
++ }
++
++ lfsr_reg = lfsr_reg & (nfilters - 1);
++
++ return lfsr_reg;
++}
++
++/* This function generates the Second Hash */
++unsigned int
++falcon_hash_function2(unsigned int key, unsigned int nfilters)
++{
++ return (unsigned int)(((unsigned long long)key * 2 - 1) &
++ (nfilters - 1));
++}
++
++/* This function iterates through the hash table */
++unsigned int
++falcon_hash_iterator(unsigned int hash1, unsigned int hash2,
++ unsigned int n_search, unsigned int nfilters)
++{
++ return (hash1 + (n_search * hash2)) & (nfilters - 1);
++}
++
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/filter_resource.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/filter_resource.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,250 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains filters support.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/nic_table.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efhw/falcon.h>
++#include <ci/efrm/vi_resource_manager.h>
++#include <ci/efrm/private.h>
++#include <ci/efrm/filter.h>
++#include <ci/efrm/buffer_table.h>
++#include <ci/efrm/efrm_client.h>
++#include "efrm_internal.h"
++
++
++struct filter_resource_manager {
++ struct efrm_resource_manager rm;
++ struct kfifo *free_ids;
++};
++
++static struct filter_resource_manager *efrm_filter_manager;
++
++
++void efrm_filter_resource_free(struct filter_resource *frs)
++{
++ struct efhw_nic *nic = frs->rs.rs_client->nic;
++ int id;
++
++ EFRM_RESOURCE_ASSERT_VALID(&frs->rs, 1);
++
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT, __func__,
++ EFRM_RESOURCE_PRI_ARG(frs->rs.rs_handle));
++
++ efhw_nic_ipfilter_clear(nic, frs->filter_idx);
++ frs->filter_idx = -1;
++ efrm_vi_resource_release(frs->pt);
++
++ /* Free this filter. */
++ id = EFRM_RESOURCE_INSTANCE(frs->rs.rs_handle);
++ EFRM_VERIFY_EQ(kfifo_put(efrm_filter_manager->free_ids,
++ (unsigned char *)&id, sizeof(id)),
++ sizeof(id));
++
++ efrm_client_put(frs->rs.rs_client);
++ EFRM_DO_DEBUG(memset(frs, 0, sizeof(*frs)));
++ kfree(frs);
++}
++EXPORT_SYMBOL(efrm_filter_resource_free);
++
++
++void efrm_filter_resource_release(struct filter_resource *frs)
++{
++ if (__efrm_resource_release(&frs->rs))
++ efrm_filter_resource_free(frs);
++}
++EXPORT_SYMBOL(efrm_filter_resource_release);
++
++
++static void filter_rm_dtor(struct efrm_resource_manager *rm)
++{
++ EFRM_TRACE("%s:", __func__);
++
++ EFRM_RESOURCE_MANAGER_ASSERT_VALID(&efrm_filter_manager->rm);
++ EFRM_ASSERT(&efrm_filter_manager->rm == rm);
++
++ kfifo_vfree(efrm_filter_manager->free_ids);
++ EFRM_TRACE("%s: done", __func__);
++}
++
++/**********************************************************************/
++/**********************************************************************/
++/**********************************************************************/
++
++int efrm_create_filter_resource_manager(struct efrm_resource_manager **rm_out)
++{
++ int rc;
++
++ EFRM_ASSERT(rm_out);
++
++ efrm_filter_manager =
++ kmalloc(sizeof(struct filter_resource_manager), GFP_KERNEL);
++ if (efrm_filter_manager == 0)
++ return -ENOMEM;
++ memset(efrm_filter_manager, 0, sizeof(*efrm_filter_manager));
++
++ rc = efrm_resource_manager_ctor(&efrm_filter_manager->rm,
++ filter_rm_dtor, "FILTER",
++ EFRM_RESOURCE_FILTER);
++ if (rc < 0)
++ goto fail1;
++
++ /* Create a pool of free instances */
++ rc = efrm_kfifo_id_ctor(&efrm_filter_manager->free_ids,
++ 0, EFHW_IP_FILTER_NUM,
++ &efrm_filter_manager->rm.rm_lock);
++ if (rc != 0)
++ goto fail2;
++
++ *rm_out = &efrm_filter_manager->rm;
++ EFRM_TRACE("%s: filter resources created - %d IDs",
++ __func__, kfifo_len(efrm_filter_manager->free_ids));
++ return 0;
++
++fail2:
++ efrm_resource_manager_dtor(&efrm_filter_manager->rm);
++fail1:
++ memset(efrm_filter_manager, 0, sizeof(*efrm_filter_manager));
++ kfree(efrm_filter_manager);
++ return rc;
++
++}
++
++
++int efrm_filter_resource_clear(struct filter_resource *frs)
++{
++ struct efhw_nic *nic = frs->rs.rs_client->nic;
++
++ efhw_nic_ipfilter_clear(nic, frs->filter_idx);
++ frs->filter_idx = -1;
++ return 0;
++}
++EXPORT_SYMBOL(efrm_filter_resource_clear);
++
++
++int
++__efrm_filter_resource_set(struct filter_resource *frs, int type,
++ unsigned saddr, uint16_t sport,
++ unsigned daddr, uint16_t dport)
++{
++ struct efhw_nic *nic = frs->rs.rs_client->nic;
++ int vi_instance;
++
++ EFRM_ASSERT(frs);
++
++ if (efrm_nic_tablep->a_nic->devtype.variant >= 'B' &&
++ (frs->pt->flags & EFHW_VI_JUMBO_EN) == 0)
++ type |= EFHW_IP_FILTER_TYPE_NOSCAT_B0_MASK;
++ vi_instance = EFRM_RESOURCE_INSTANCE(frs->pt->rs.rs_handle);
++
++ return efhw_nic_ipfilter_set(nic, type, &frs->filter_idx,
++ vi_instance, saddr, sport, daddr, dport);
++}
++EXPORT_SYMBOL(__efrm_filter_resource_set);;
++
++
++int
++efrm_filter_resource_alloc(struct vi_resource *vi_parent,
++ struct filter_resource **frs_out)
++{
++ struct filter_resource *frs;
++ int rc, instance;
++
++ EFRM_ASSERT(frs_out);
++ EFRM_ASSERT(efrm_filter_manager);
++ EFRM_RESOURCE_MANAGER_ASSERT_VALID(&efrm_filter_manager->rm);
++ EFRM_ASSERT(vi_parent != NULL);
++ EFRM_ASSERT(EFRM_RESOURCE_TYPE(vi_parent->rs.rs_handle) ==
++ EFRM_RESOURCE_VI);
++
++ /* Allocate resource data structure. */
++ frs = kmalloc(sizeof(struct filter_resource), GFP_KERNEL);
++ if (!frs)
++ return -ENOMEM;
++
++ /* Allocate an instance. */
++ rc = kfifo_get(efrm_filter_manager->free_ids,
++ (unsigned char *)&instance, sizeof(instance));
++ if (rc != sizeof(instance)) {
++ EFRM_TRACE("%s: out of instances", __func__);
++ EFRM_ASSERT(rc == 0);
++ rc = -EBUSY;
++ goto fail1;
++ }
++
++ /* Initialise the resource DS. */
++ efrm_resource_init(&frs->rs, EFRM_RESOURCE_FILTER, instance);
++ frs->pt = vi_parent;
++ efrm_resource_ref(&frs->pt->rs);
++ frs->filter_idx = -1;
++
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT " VI %d", __func__,
++ EFRM_RESOURCE_PRI_ARG(frs->rs.rs_handle),
++ EFRM_RESOURCE_INSTANCE(vi_parent->rs.rs_handle));
++
++ efrm_client_add_resource(vi_parent->rs.rs_client, &frs->rs);
++ *frs_out = frs;
++ return 0;
++
++fail1:
++ memset(frs, 0, sizeof(*frs));
++ kfree(frs);
++ return rc;
++}
++EXPORT_SYMBOL(efrm_filter_resource_alloc);
++
++
++int efrm_filter_resource_instance(struct filter_resource *frs)
++{
++ return EFRM_RESOURCE_INSTANCE(frs->rs.rs_handle);
++}
++EXPORT_SYMBOL(efrm_filter_resource_instance);
++
++
++struct efrm_resource *
++efrm_filter_resource_to_resource(struct filter_resource *frs)
++{
++ return &frs->rs;
++}
++EXPORT_SYMBOL(efrm_filter_resource_to_resource);
++
++
++struct filter_resource *
++efrm_filter_resource_from_resource(struct efrm_resource *rs)
++{
++ return filter_resource(rs);
++}
++EXPORT_SYMBOL(efrm_filter_resource_from_resource);
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/iobufset_resource.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/iobufset_resource.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,404 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains non-contiguous I/O buffers support.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/nic_table.h>
++#include <ci/efhw/iopage.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efrm/private.h>
++#include <ci/efrm/iobufset.h>
++#include <ci/efrm/vi_resource_manager.h>
++#include <ci/efrm/buffer_table.h>
++#include <ci/efrm/efrm_client.h>
++#include "efrm_internal.h"
++
++
++#define EFRM_IOBUFSET_MAX_NUM_INSTANCES 0x00010000
++
++struct iobufset_resource_manager {
++ struct efrm_resource_manager rm;
++ struct kfifo *free_ids;
++};
++
++struct iobufset_resource_manager *efrm_iobufset_manager;
++
++#define iobsrs(rs1) iobufset_resource(rs1)
++
++/* Returns size of iobufset resource data structure. */
++static inline size_t iobsrs_size(int n_pages)
++{
++ return offsetof(struct iobufset_resource, bufs) +
++ n_pages * sizeof(struct efhw_iopage);
++}
++
++void efrm_iobufset_resource_free(struct iobufset_resource *rs)
++{
++ unsigned int i;
++ int id;
++
++ EFRM_RESOURCE_ASSERT_VALID(&rs->rs, 1);
++
++ if (!rs->linked && rs->buf_tbl_alloc.base != (unsigned) -1)
++ efrm_buffer_table_free(&rs->buf_tbl_alloc);
++
++ /* see comment on call to efhw_iopage_alloc in the alloc routine above
++ for discussion on use of efrm_nic_tablep->a_nic here */
++ EFRM_ASSERT(efrm_nic_tablep->a_nic);
++ if (rs->linked) {
++ /* Nothing to do. */
++ } else if (rs->chunk_order == 0) {
++ for (i = 0; i < rs->n_bufs; ++i)
++ efhw_iopage_free(efrm_nic_tablep->a_nic, &rs->bufs[i]);
++ } else {
++ /* it is important that this is executed in increasing page
++ * order because some implementations of
++ * efhw_iopages_init_from_iopage() assume this */
++ for (i = 0; i < rs->n_bufs;
++ i += rs->pages_per_contiguous_chunk) {
++ struct efhw_iopages iopages;
++ efhw_iopages_init_from_iopage(&iopages, &rs->bufs[i],
++ rs->chunk_order);
++ efhw_iopages_free(efrm_nic_tablep->a_nic, &iopages);
++ }
++ }
++
++ /* free the instance number */
++ id = EFRM_RESOURCE_INSTANCE(rs->rs.rs_handle);
++ EFRM_VERIFY_EQ(kfifo_put(efrm_iobufset_manager->free_ids,
++ (unsigned char *)&id, sizeof(id)), sizeof(id));
++
++ efrm_vi_resource_release(rs->evq);
++ if (rs->linked)
++ efrm_iobufset_resource_release(rs->linked);
++
++ efrm_client_put(rs->rs.rs_client);
++ if (iobsrs_size(rs->n_bufs) < PAGE_SIZE) {
++ EFRM_DO_DEBUG(memset(rs, 0, sizeof(*rs)));
++ kfree(rs);
++ } else {
++ EFRM_DO_DEBUG(memset(rs, 0, sizeof(*rs)));
++ vfree(rs);
++ }
++}
++EXPORT_SYMBOL(efrm_iobufset_resource_free);
++
++
++void efrm_iobufset_resource_release(struct iobufset_resource *iobrs)
++{
++ if (__efrm_resource_release(&iobrs->rs))
++ efrm_iobufset_resource_free(iobrs);
++}
++EXPORT_SYMBOL(efrm_iobufset_resource_release);
++
++
++
++int
++efrm_iobufset_resource_alloc(int32_t n_pages,
++ int32_t pages_per_contiguous_chunk,
++ struct vi_resource *vi_evq,
++ struct iobufset_resource *linked,
++ bool phys_addr_mode,
++ struct iobufset_resource **iobrs_out)
++{
++ struct iobufset_resource *iobrs;
++ int rc, instance, object_size;
++ unsigned int i;
++
++ EFRM_ASSERT(iobrs_out);
++ EFRM_ASSERT(efrm_iobufset_manager);
++ EFRM_RESOURCE_MANAGER_ASSERT_VALID(&efrm_iobufset_manager->rm);
++ EFRM_RESOURCE_ASSERT_VALID(&vi_evq->rs, 0);
++ EFRM_ASSERT(EFRM_RESOURCE_TYPE(vi_evq->rs.rs_handle) ==
++ EFRM_RESOURCE_VI);
++ EFRM_ASSERT(efrm_nic_tablep->a_nic);
++
++ if (linked) {
++ /* This resource will share properties and memory with
++ * another. Only difference is that we'll program it into
++ * the buffer table of another nic.
++ */
++ n_pages = linked->n_bufs;
++ pages_per_contiguous_chunk = linked->pages_per_contiguous_chunk;
++ phys_addr_mode = linked->buf_tbl_alloc.base == (unsigned) -1;
++ }
++
++ /* allocate the resource data structure. */
++ object_size = iobsrs_size(n_pages);
++ if (object_size < PAGE_SIZE) {
++ /* this should be OK from a tasklet */
++ /* Necessary to do atomic alloc() as this
++ can be called from a weird-ass iSCSI context that is
++ !in_interrupt but is in_atomic - See BUG3163 */
++ iobrs = kmalloc(object_size, GFP_ATOMIC);
++ } else { /* can't do this within a tasklet */
++#ifndef NDEBUG
++ if (in_interrupt() || in_atomic()) {
++ EFRM_ERR("%s(): alloc->u.iobufset.in_n_pages=%d",
++ __func__, n_pages);
++ EFRM_ASSERT(!in_interrupt());
++ EFRM_ASSERT(!in_atomic());
++ }
++#endif
++ iobrs = (struct iobufset_resource *) vmalloc(object_size);
++ }
++ if (iobrs == NULL) {
++ EFRM_WARN("%s: failed to allocate container", __func__);
++ rc = -ENOMEM;
++ goto fail1;
++ }
++
++ /* Allocate an instance number. */
++ rc = kfifo_get(efrm_iobufset_manager->free_ids,
++ (unsigned char *)&instance, sizeof(instance));
++ if (rc != sizeof(instance)) {
++ EFRM_WARN("%s: out of instances", __func__);
++ EFRM_ASSERT(rc == 0);
++ rc = -EBUSY;
++ goto fail3;
++ }
++
++ efrm_resource_init(&iobrs->rs, EFRM_RESOURCE_IOBUFSET, instance);
++
++ iobrs->evq = vi_evq;
++ iobrs->linked = linked;
++ iobrs->n_bufs = n_pages;
++ iobrs->pages_per_contiguous_chunk = pages_per_contiguous_chunk;
++ iobrs->chunk_order = fls(iobrs->pages_per_contiguous_chunk - 1);
++ iobrs->buf_tbl_alloc.base = (unsigned) -1;
++
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT " %u pages", __func__,
++ EFRM_RESOURCE_PRI_ARG(iobrs->rs.rs_handle), iobrs->n_bufs);
++
++ /* Allocate the iobuffers. */
++ if (linked) {
++ memcpy(iobrs->bufs, linked->bufs,
++ iobrs->n_bufs * sizeof(iobrs->bufs[0]));
++ } else if (iobrs->chunk_order == 0) {
++ memset(iobrs->bufs, 0, iobrs->n_bufs * sizeof(iobrs->bufs[0]));
++ for (i = 0; i < iobrs->n_bufs; ++i) {
++ /* due to bug2426 we have to specifiy a NIC when
++ * allocating a DMAable page, which is a bit messy.
++ * For now we assume that if the page is suitable
++ * (e.g. DMAable) by one nic (efrm_nic_tablep->a_nic),
++ * it is suitable for all NICs.
++ * XXX I bet that breaks in Solaris.
++ */
++ rc = efhw_iopage_alloc(efrm_nic_tablep->a_nic,
++ &iobrs->bufs[i]);
++ if (rc < 0) {
++ EFRM_WARN("%s: failed (rc %d) to allocate "
++ "page (i=%u)", __func__, rc, i);
++ goto fail4;
++ }
++ }
++ } else {
++ struct efhw_iopages iopages;
++ unsigned j;
++
++ memset(iobrs->bufs, 0, iobrs->n_bufs * sizeof(iobrs->bufs[0]));
++ for (i = 0; i < iobrs->n_bufs;
++ i += iobrs->pages_per_contiguous_chunk) {
++ rc = efhw_iopages_alloc(efrm_nic_tablep->a_nic,
++ &iopages, iobrs->chunk_order);
++ if (rc < 0) {
++ EFRM_WARN("%s: failed (rc %d) to allocate "
++ "pages (i=%u order %d)",
++ __func__, rc, i,
++ iobrs->chunk_order);
++ goto fail4;
++ }
++ for (j = 0; j < iobrs->pages_per_contiguous_chunk;
++ j++) {
++ /* some implementation of
++ * efhw_iopage_init_from_iopages() rely on
++ * this function being called for
++ * _all_ pages in the chunk */
++ efhw_iopage_init_from_iopages(
++ &iobrs->bufs[i + j],
++ &iopages, j);
++ }
++ }
++ }
++
++ if (!phys_addr_mode) {
++ unsigned owner_id = EFAB_VI_RESOURCE_INSTANCE(iobrs->evq);
++
++ if (!linked) {
++ /* Allocate space in the NIC's buffer table. */
++ rc = efrm_buffer_table_alloc(fls(iobrs->n_bufs - 1),
++ &iobrs->buf_tbl_alloc);
++ if (rc < 0) {
++ EFRM_WARN("%s: failed (%d) to alloc %d buffer "
++ "table entries", __func__, rc,
++ iobrs->n_bufs);
++ goto fail5;
++ }
++ EFRM_ASSERT(((unsigned)1 << iobrs->buf_tbl_alloc.order)
++ >= (unsigned) iobrs->n_bufs);
++ } else {
++ iobrs->buf_tbl_alloc = linked->buf_tbl_alloc;
++ }
++
++ /* Initialise the buffer table entries. */
++ for (i = 0; i < iobrs->n_bufs; ++i) {
++ /*\ ?? \TODO burst them! */
++ efrm_buffer_table_set(&iobrs->buf_tbl_alloc,
++ vi_evq->rs.rs_client->nic,
++ i,
++ efhw_iopage_dma_addr(&iobrs->
++ bufs[i]),
++ owner_id);
++ }
++ efrm_buffer_table_commit();
++ }
++
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT " %d pages @ "
++ EFHW_BUFFER_ADDR_FMT, __func__,
++ EFRM_RESOURCE_PRI_ARG(iobrs->rs.rs_handle),
++ iobrs->n_bufs, EFHW_BUFFER_ADDR(iobrs->buf_tbl_alloc.base,
++ 0));
++ efrm_resource_ref(&iobrs->evq->rs);
++ if (linked != NULL)
++ efrm_resource_ref(&linked->rs);
++ efrm_client_add_resource(vi_evq->rs.rs_client, &iobrs->rs);
++ *iobrs_out = iobrs;
++ return 0;
++
++fail5:
++ i = iobrs->n_bufs;
++fail4:
++ /* see comment on call to efhw_iopage_alloc above for a discussion
++ * on use of efrm_nic_tablep->a_nic here */
++ if (linked) {
++ /* Nothing to do. */
++ } else if (iobrs->chunk_order == 0) {
++ while (i--) {
++ struct efhw_iopage *page = &iobrs->bufs[i];
++ efhw_iopage_free(efrm_nic_tablep->a_nic, page);
++ }
++ } else {
++ unsigned int j;
++ for (j = 0; j < i; j += iobrs->pages_per_contiguous_chunk) {
++ struct efhw_iopages iopages;
++
++ EFRM_ASSERT(j % iobrs->pages_per_contiguous_chunk
++ == 0);
++ /* it is important that this is executed in increasing
++ * page order because some implementations of
++ * efhw_iopages_init_from_iopage() assume this */
++ efhw_iopages_init_from_iopage(&iopages,
++ &iobrs->bufs[j],
++ iobrs->chunk_order);
++ efhw_iopages_free(efrm_nic_tablep->a_nic, &iopages);
++ }
++ }
++fail3:
++ if (object_size < PAGE_SIZE)
++ kfree(iobrs);
++ else
++ vfree(iobrs);
++fail1:
++ return rc;
++}
++EXPORT_SYMBOL(efrm_iobufset_resource_alloc);
++
++static void iobufset_rm_dtor(struct efrm_resource_manager *rm)
++{
++ EFRM_ASSERT(&efrm_iobufset_manager->rm == rm);
++ kfifo_vfree(efrm_iobufset_manager->free_ids);
++}
++
++int
++efrm_create_iobufset_resource_manager(struct efrm_resource_manager **rm_out)
++{
++ int rc, max;
++
++ EFRM_ASSERT(rm_out);
++
++ efrm_iobufset_manager =
++ kmalloc(sizeof(*efrm_iobufset_manager), GFP_KERNEL);
++ if (efrm_iobufset_manager == 0)
++ return -ENOMEM;
++ memset(efrm_iobufset_manager, 0, sizeof(*efrm_iobufset_manager));
++
++ /*
++ * Bug 1145, 1370: We need to set initial size of both the resource
++ * table and instance id table so they never need to grow as we
++ * want to be allocate new iobufset at tasklet time. Lets make
++ * a pessimistic guess at maximum number of iobufsets possible.
++ * Could be less because
++ * - jumbo frames have same no of packets per iobufset BUT more
++ * pages per buffer
++ * - buffer table entries used independently of iobufsets by
++ * sendfile
++ *
++ * Based on TCP/IP stack setting of PKTS_PER_SET_S=5 ...
++ * - can't use this define here as it breaks the layering.
++ */
++#define MIN_PAGES_PER_IOBUFSET (1 << 4)
++
++ max = efrm_buffer_table_size() / MIN_PAGES_PER_IOBUFSET;
++ max = min_t(int, max, EFRM_IOBUFSET_MAX_NUM_INSTANCES);
++
++ /* HACK: There currently exists an option to allocate buffers that
++ * are not programmed into the buffer table, so the max number is
++ * not limited by the buffer table size. I'm hoping this usage
++ * will go away eventually.
++ */
++ max = 32768;
++
++ rc = efrm_kfifo_id_ctor(&efrm_iobufset_manager->free_ids,
++ 0, max, &efrm_iobufset_manager->rm.rm_lock);
++ if (rc != 0)
++ goto fail1;
++
++ rc = efrm_resource_manager_ctor(&efrm_iobufset_manager->rm,
++ iobufset_rm_dtor, "IOBUFSET",
++ EFRM_RESOURCE_IOBUFSET);
++ if (rc < 0)
++ goto fail2;
++
++ *rm_out = &efrm_iobufset_manager->rm;
++ return 0;
++
++fail2:
++ kfifo_vfree(efrm_iobufset_manager->free_ids);
++fail1:
++ EFRM_DO_DEBUG(memset(efrm_iobufset_manager, 0,
++ sizeof(*efrm_iobufset_manager)));
++ kfree(efrm_iobufset_manager);
++ return rc;
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/iopage.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/iopage.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,103 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides Linux-specific implementation for iopage API used
++ * from efhw library.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/driver/resource/linux_efhw_nic.h>
++#include "kernel_compat.h"
++#include <ci/efhw/common_sysdep.h> /* for dma_addr_t */
++
++int efhw_iopage_alloc(struct efhw_nic *nic, struct efhw_iopage *p)
++{
++ struct linux_efhw_nic *lnic = linux_efhw_nic(nic);
++ dma_addr_t handle;
++ void *kva;
++
++ kva = efrm_pci_alloc_consistent(lnic->pci_dev, PAGE_SIZE,
++ &handle);
++ if (kva == 0)
++ return -ENOMEM;
++
++ EFHW_ASSERT((handle & ~PAGE_MASK) == 0);
++
++ memset((void *)kva, 0, PAGE_SIZE);
++ efhw_page_init_from_va(&p->p, kva);
++
++ p->dma_addr = handle;
++
++ return 0;
++}
++
++void efhw_iopage_free(struct efhw_nic *nic, struct efhw_iopage *p)
++{
++ struct linux_efhw_nic *lnic = linux_efhw_nic(nic);
++ EFHW_ASSERT(efhw_page_is_valid(&p->p));
++
++ efrm_pci_free_consistent(lnic->pci_dev, PAGE_SIZE,
++ efhw_iopage_ptr(p), p->dma_addr);
++}
++
++int
++efhw_iopages_alloc(struct efhw_nic *nic, struct efhw_iopages *p,
++ unsigned order)
++{
++ unsigned bytes = 1u << (order + PAGE_SHIFT);
++ struct linux_efhw_nic *lnic = linux_efhw_nic(nic);
++ dma_addr_t handle;
++ caddr_t addr;
++ int gfp_flag;
++
++ /* Set __GFP_COMP if available to make reference counting work.
++ * This is recommended here:
++ * http://www.forbiddenweb.org/viewtopic.php?id=83167&page=4#348331
++ */
++ gfp_flag = ((in_atomic() ? GFP_ATOMIC : GFP_KERNEL) | __GFP_COMP);
++ addr = efrm_dma_alloc_coherent(&lnic->pci_dev->dev, bytes, &handle,
++ gfp_flag);
++ if (addr == NULL)
++ return -ENOMEM;
++
++ EFHW_ASSERT((handle & ~PAGE_MASK) == 0);
++
++ p->order = order;
++ p->dma_addr = handle;
++ p->kva = addr;
++
++ return 0;
++}
++
++void efhw_iopages_free(struct efhw_nic *nic, struct efhw_iopages *p)
++{
++ unsigned bytes = 1u << (p->order + PAGE_SHIFT);
++ struct linux_efhw_nic *lnic = linux_efhw_nic(nic);
++
++ efrm_dma_free_coherent(&lnic->pci_dev->dev, bytes,
++ (void *)p->kva, p->dma_addr);
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/kernel_compat.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/kernel_compat.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,118 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides compatibility layer for various Linux kernel versions
++ * (starting from 2.6.9 RHEL kernel).
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#define IN_KERNEL_COMPAT_C
++#include <linux/types.h>
++#include <ci/efrm/debug.h>
++#include "kernel_compat.h"
++
++/* Set this to 1 to enable very basic counting of iopage(s) allocations, then
++ * call dump_iopage_counts() to show the number of current allocations of
++ * orders 0-7.
++ */
++#define EFRM_IOPAGE_COUNTS_ENABLED 0
++
++
++/****************************************************************************
++ *
++ * allocate a buffer suitable for DMA to/from the NIC
++ *
++ ****************************************************************************/
++
++#if EFRM_IOPAGE_COUNTS_ENABLED
++
++static int iopage_counts[8];
++
++void dump_iopage_counts(void)
++{
++ EFRM_NOTICE("iopage counts: %d %d %d %d %d %d %d %d", iopage_counts[0],
++ iopage_counts[1], iopage_counts[2], iopage_counts[3],
++ iopage_counts[4], iopage_counts[5], iopage_counts[6],
++ iopage_counts[7]);
++}
++
++#endif
++
++
++
++/*********** pci_alloc_consistent / pci_free_consistent ***********/
++
++void *efrm_dma_alloc_coherent(struct device *dev, size_t size,
++ dma_addr_t *dma_addr, int flag)
++{
++ void *ptr;
++ unsigned order;
++
++ order = __ffs(size/PAGE_SIZE);
++ EFRM_ASSERT(size == (PAGE_SIZE<<order));
++
++ /* Can't take a spinlock here since the allocation can
++ * block. */
++ ptr = dma_alloc_coherent(dev, size, dma_addr, flag);
++ if (ptr == NULL)
++ return ptr;
++
++#if EFRM_IOPAGE_COUNTS_ENABLED
++ if (order < 8)
++ iopage_counts[order]++;
++ else
++ EFRM_ERR("Huge iopages alloc (order=%d) ??? (not counted)",
++ order);
++#endif
++
++ return ptr;
++}
++
++void efrm_dma_free_coherent(struct device *dev, size_t size,
++ void *ptr, dma_addr_t dma_addr)
++{
++ unsigned order;
++
++ order = __ffs(size/PAGE_SIZE);
++ EFRM_ASSERT(size == (PAGE_SIZE<<order));
++
++#if EFRM_IOPAGE_COUNTS_ENABLED
++ if (order < 8)
++ --iopage_counts[order];
++ else
++ EFRM_ERR("Huge iopages free (order=%d) ??? (not counted)",
++ order);
++#endif
++
++ dma_free_coherent(dev, size, ptr, dma_addr);
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/kernel_compat.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/kernel_compat.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,70 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides compatibility layer for various Linux kernel versions
++ * (starting from 2.6.9 RHEL kernel).
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef DRIVER_LINUX_RESOURCE_KERNEL_COMPAT_H
++#define DRIVER_LINUX_RESOURCE_KERNEL_COMPAT_H
++
++#include <linux/moduleparam.h>
++#include <linux/sched.h>
++#include <linux/io.h>
++#include <linux/pci.h>
++
++/********* pci_map_*() ********************/
++
++extern void *efrm_dma_alloc_coherent(struct device *dev, size_t size,
++ dma_addr_t *dma_addr, int flag);
++
++extern void efrm_dma_free_coherent(struct device *dev, size_t size,
++ void *ptr, dma_addr_t dma_addr);
++
++static inline void *efrm_pci_alloc_consistent(struct pci_dev *hwdev,
++ size_t size,
++ dma_addr_t *dma_addr)
++{
++ return efrm_dma_alloc_coherent(&hwdev->dev, size, dma_addr,
++ GFP_ATOMIC);
++}
++
++static inline void efrm_pci_free_consistent(struct pci_dev *hwdev, size_t size,
++ void *ptr, dma_addr_t dma_addr)
++{
++ efrm_dma_free_coherent(&hwdev->dev, size, ptr, dma_addr);
++}
++
++
++#endif /* DRIVER_LINUX_RESOURCE_KERNEL_COMPAT_H */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/kernel_proc.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/kernel_proc.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,109 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains /proc/driver/sfc_resource/ implementation.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/debug.h>
++#include <ci/efrm/driver_private.h>
++#include <linux/proc_fs.h>
++
++/** Top level directory for sfc specific stats **/
++static struct proc_dir_entry *efrm_proc_root; /* = NULL */
++
++static int
++efrm_resource_read_proc(char *buf, char **start, off_t offset, int count,
++ int *eof, void *data);
++
++int efrm_install_proc_entries(void)
++{
++ /* create the top-level directory for etherfabric specific stuff */
++ efrm_proc_root = proc_mkdir("driver/sfc_resource", NULL);
++ if (!efrm_proc_root)
++ return -ENOMEM;
++
++ if (create_proc_read_entry("resources", 0, efrm_proc_root,
++ efrm_resource_read_proc, 0) == NULL) {
++ EFRM_WARN("%s: Unable to create /proc/drivers/sfc_resource/"
++ "resources", __func__);
++ }
++ return 0;
++}
++
++void efrm_uninstall_proc_entries(void)
++{
++ EFRM_ASSERT(efrm_proc_root);
++ remove_proc_entry("resources", efrm_proc_root);
++ remove_proc_entry(efrm_proc_root->name, efrm_proc_root->parent);
++ efrm_proc_root = NULL;
++}
++
++/****************************************************************************
++ *
++ * /proc/drivers/sfc/resources
++ *
++ ****************************************************************************/
++
++#define EFRM_PROC_PRINTF(buf, len, fmt, ...) \
++ do { \
++ if (count - len > 0) \
++ len += snprintf(buf+len, count-len, (fmt), \
++ __VA_ARGS__); \
++ } while (0)
++
++static int
++efrm_resource_read_proc(char *buf, char **start, off_t offset, int count,
++ int *eof, void *data)
++{
++ irq_flags_t lock_flags;
++ int len = 0;
++ int type;
++ struct efrm_resource_manager *rm;
++
++ for (type = 0; type < EFRM_RESOURCE_NUM; type++) {
++ rm = efrm_rm_table[type];
++ if (rm == NULL)
++ continue;
++
++ EFRM_PROC_PRINTF(buf, len, "*** %s ***\n", rm->rm_name);
++
++ spin_lock_irqsave(&rm->rm_lock, lock_flags);
++ EFRM_PROC_PRINTF(buf, len, "current = %u\n", rm->rm_resources);
++ EFRM_PROC_PRINTF(buf, len, " max = %u\n\n",
++ rm->rm_resources_hiwat);
++ spin_unlock_irqrestore(&rm->rm_lock, lock_flags);
++ }
++
++ return count ? strlen(buf) : 0;
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/kfifo.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/kfifo.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,208 @@
++/*
++ * A simple kernel FIFO implementation.
++ *
++ * Copyright (C) 2004 Stelian Pop <stelian@popies.net>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ */
++
++/*
++ * This file is stolen from the Linux kernel sources
++ * (linux-2.6.22/kernel/kfifo.c) into sfc_resource driver.
++ * It should be used for old kernels without kfifo implementation.
++ * Most part of linux/kfifo.h is incorporated into
++ * ci/efrm/sysdep_linux.h.
++ */
++#include <ci/efrm/sysdep_linux.h>
++#ifdef HAS_NO_KFIFO
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/err.h>
++/*#include <linux/kfifo.h>*/
++
++/**
++ * kfifo_init - allocates a new FIFO using a preallocated buffer
++ * @buffer: the preallocated buffer to be used.
++ * @size: the size of the internal buffer, this have to be a power of 2.
++ * @gfp_mask: get_free_pages mask, passed to kmalloc()
++ * @lock: the lock to be used to protect the fifo buffer
++ *
++ * Do NOT pass the kfifo to kfifo_free() after use! Simply free the
++ * &struct kfifo with kfree().
++ */
++struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size,
++ gfp_t gfp_mask, spinlock_t *lock)
++{
++ struct kfifo *fifo;
++
++ /* size must be a power of 2 */
++ BUG_ON(size & (size - 1));
++
++ fifo = kmalloc(sizeof(struct kfifo), gfp_mask);
++ if (!fifo)
++ return ERR_PTR(-ENOMEM);
++
++ fifo->buffer = buffer;
++ fifo->size = size;
++ fifo->in = fifo->out = 0;
++ fifo->lock = lock;
++
++ return fifo;
++}
++EXPORT_SYMBOL(kfifo_init);
++
++/**
++ * kfifo_alloc - allocates a new FIFO and its internal buffer
++ * @size: the size of the internal buffer to be allocated.
++ * @gfp_mask: get_free_pages mask, passed to kmalloc()
++ * @lock: the lock to be used to protect the fifo buffer
++ *
++ * The size will be rounded-up to a power of 2.
++ */
++struct kfifo *kfifo_alloc(unsigned int size, gfp_t gfp_mask, spinlock_t *lock)
++{
++ unsigned char *buffer;
++ struct kfifo *ret;
++
++ /*
++ * round up to the next power of 2, since our 'let the indices
++ * wrap' tachnique works only in this case.
++ */
++ if (size & (size - 1)) {
++ BUG_ON(size > 0x80000000);
++ size = roundup_pow_of_two(size);
++ }
++
++ buffer = kmalloc(size, gfp_mask);
++ if (!buffer)
++ return ERR_PTR(-ENOMEM);
++
++ ret = kfifo_init(buffer, size, gfp_mask, lock);
++
++ if (IS_ERR(ret))
++ kfree(buffer);
++
++ return ret;
++}
++EXPORT_SYMBOL(kfifo_alloc);
++
++/**
++ * kfifo_free - frees the FIFO
++ * @fifo: the fifo to be freed.
++ */
++void kfifo_free(struct kfifo *fifo)
++{
++ kfree(fifo->buffer);
++ kfree(fifo);
++}
++EXPORT_SYMBOL(kfifo_free);
++
++/**
++ * __kfifo_put - puts some data into the FIFO, no locking version
++ * @fifo: the fifo to be used.
++ * @buffer: the data to be added.
++ * @len: the length of the data to be added.
++ *
++ * This function copies at most @len bytes from the @buffer into
++ * the FIFO depending on the free space, and returns the number of
++ * bytes copied.
++ *
++ * Note that with only one concurrent reader and one concurrent
++ * writer, you don't need extra locking to use these functions.
++ */
++unsigned int
++__kfifo_put(struct kfifo *fifo, unsigned char *buffer, unsigned int len)
++{
++ unsigned int l;
++
++ len = min(len, fifo->size - fifo->in + fifo->out);
++
++ /*
++ * Ensure that we sample the fifo->out index -before- we
++ * start putting bytes into the kfifo.
++ */
++
++ smp_mb();
++
++ /* first put the data starting from fifo->in to buffer end */
++ l = min(len, fifo->size - (fifo->in & (fifo->size - 1)));
++ memcpy(fifo->buffer + (fifo->in & (fifo->size - 1)), buffer, l);
++
++ /* then put the rest (if any) at the beginning of the buffer */
++ memcpy(fifo->buffer, buffer + l, len - l);
++
++ /*
++ * Ensure that we add the bytes to the kfifo -before-
++ * we update the fifo->in index.
++ */
++
++ smp_wmb();
++
++ fifo->in += len;
++
++ return len;
++}
++EXPORT_SYMBOL(__kfifo_put);
++
++/**
++ * __kfifo_get - gets some data from the FIFO, no locking version
++ * @fifo: the fifo to be used.
++ * @buffer: where the data must be copied.
++ * @len: the size of the destination buffer.
++ *
++ * This function copies at most @len bytes from the FIFO into the
++ * @buffer and returns the number of copied bytes.
++ *
++ * Note that with only one concurrent reader and one concurrent
++ * writer, you don't need extra locking to use these functions.
++ */
++unsigned int
++__kfifo_get(struct kfifo *fifo, unsigned char *buffer, unsigned int len)
++{
++ unsigned int l;
++
++ len = min(len, fifo->in - fifo->out);
++
++ /*
++ * Ensure that we sample the fifo->in index -before- we
++ * start removing bytes from the kfifo.
++ */
++
++ smp_rmb();
++
++ /* first get the data from fifo->out until the end of the buffer */
++ l = min(len, fifo->size - (fifo->out & (fifo->size - 1)));
++ memcpy(buffer, fifo->buffer + (fifo->out & (fifo->size - 1)), l);
++
++ /* then get the rest (if any) from the beginning of the buffer */
++ memcpy(buffer + l, fifo->buffer, len - l);
++
++ /*
++ * Ensure that we remove the bytes from the kfifo -before-
++ * we update the fifo->out index.
++ */
++
++ smp_mb();
++
++ fifo->out += len;
++
++ return len;
++}
++EXPORT_SYMBOL(__kfifo_get);
++
++#endif
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/linux_resource_internal.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/linux_resource_internal.h 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,76 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains Linux-specific API internal for the resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __LINUX_RESOURCE_INTERNAL__
++#define __LINUX_RESOURCE_INTERNAL__
++
++#include <ci/driver/resource/linux_efhw_nic.h>
++#include <ci/efrm/debug.h>
++#include <ci/efrm/driver_private.h>
++#include <ci/driver/efab/hardware.h>
++
++
++/*! Linux specific EtherFabric initialisation */
++extern int
++linux_efrm_nic_ctor(struct linux_efhw_nic *, struct pci_dev *,
++ spinlock_t *reg_lock,
++ unsigned nic_flags, unsigned nic_options);
++
++/*! Linux specific EtherFabric initialisation */
++extern void linux_efrm_nic_dtor(struct linux_efhw_nic *);
++
++/*! Linux specific EtherFabric initialisation -- interrupt registration */
++extern int linux_efrm_irq_ctor(struct linux_efhw_nic *);
++
++/*! Linux specific EtherFabric initialisation -- interrupt deregistration */
++extern void linux_efrm_irq_dtor(struct linux_efhw_nic *);
++
++extern int efrm_driverlink_register(void);
++extern void efrm_driverlink_unregister(void);
++
++extern int
++efrm_nic_add(struct pci_dev *dev, unsigned int opts, const uint8_t *mac_addr,
++ struct linux_efhw_nic **lnic_out, spinlock_t *reg_lock,
++ int bt_min, int bt_max, int non_irq_evq,
++ const struct vi_resource_dimensions *);
++extern void efrm_nic_del(struct linux_efhw_nic *);
++
++
++extern int efrm_install_proc_entries(void);
++extern void efrm_uninstall_proc_entries(void);
++
++#endif /* __LINUX_RESOURCE_INTERNAL__ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/nic.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/nic.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,174 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains EtherFabric Generic NIC instance (init, interrupts,
++ * etc)
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efhw/debug.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efhw/falcon.h>
++#include <ci/efhw/nic.h>
++#include <ci/efhw/eventq.h>
++
++
++int efhw_device_type_init(struct efhw_device_type *dt,
++ int vendor_id, int device_id,
++ int class_revision)
++{
++ if (vendor_id != 0x1924)
++ return 0;
++
++ switch (device_id) {
++ case 0x0703:
++ case 0x6703:
++ dt->variant = 'A';
++ switch (class_revision) {
++ case 0:
++ dt->revision = 0;
++ break;
++ case 1:
++ dt->revision = 1;
++ break;
++ default:
++ return 0;
++ }
++ break;
++ case 0x0710:
++ dt->variant = 'B';
++ switch (class_revision) {
++ case 2:
++ dt->revision = 0;
++ break;
++ default:
++ return 0;
++ }
++ break;
++ default:
++ return 0;
++ }
++
++ return 1;
++}
++
++
++/*--------------------------------------------------------------------
++ *
++ * NIC Initialisation
++ *
++ *--------------------------------------------------------------------*/
++
++/* make this separate from initialising data structure
++** to allow this to be called at a later time once we can access PCI
++** config space to find out what hardware we have
++*/
++void efhw_nic_init(struct efhw_nic *nic, unsigned flags, unsigned options,
++ struct efhw_device_type dev_type)
++{
++ nic->devtype = dev_type;
++ nic->flags = flags;
++ nic->options = options;
++ nic->bar_ioaddr = 0;
++ spin_lock_init(&nic->the_reg_lock);
++ nic->reg_lock = &nic->the_reg_lock;
++ nic->mtu = 1500 + ETH_HLEN;
++
++ nic->irq_unit = EFHW_IRQ_UNIT_UNUSED;
++
++ nic->evq_sizes = 512 | 1024 | 2048 | 4096 | 8192 |
++ 16384 | 32768;
++ nic->txq_sizes = 512 | 1024 | 2048 | 4096;
++ nic->rxq_sizes = 512 | 1024 | 2048 | 4096;
++ nic->efhw_func = &falcon_char_functional_units;
++ nic->ctr_ap_bytes = EFHW_64M;
++ switch (nic->devtype.variant) {
++ case 'A':
++ nic->ctr_ap_bar = FALCON_S_CTR_AP_BAR;
++ nic->num_evqs = 4096;
++ nic->num_dmaqs = 4096;
++ nic->num_timers = 4096;
++ break;
++ case 'B':
++ nic->flags |= NIC_FLAG_NO_INTERRUPT;
++ nic->ctr_ap_bar = FALCON_P_CTR_AP_BAR;
++ nic->num_evqs = 4096;
++ nic->num_dmaqs = 4096;
++ nic->num_timers = 4096;
++ break;
++ default:
++ EFHW_ASSERT(0);
++ break;
++ }
++}
++
++
++void efhw_nic_close_interrupts(struct efhw_nic *nic)
++{
++ EFHW_ASSERT(nic);
++ if (!efhw_nic_have_hw(nic))
++ return;
++
++ EFHW_ASSERT(efhw_nic_have_hw(nic));
++
++ if (nic->irq_unit != EFHW_IRQ_UNIT_UNUSED)
++ efhw_nic_interrupt_disable(nic);
++}
++
++void efhw_nic_dtor(struct efhw_nic *nic)
++{
++ EFHW_ASSERT(nic);
++
++ /* Check that we have functional units because the software only
++ * driver doesn't initialise anything hardware related any more */
++
++ /* close interrupts is called first because the act of deregistering
++ the driver could cause this driver to change from master to slave
++ and hence the implicit interrupt mappings would be wrong */
++
++ EFHW_TRACE("%s: functional units ... ", __func__);
++
++ if (efhw_nic_have_functional_units(nic)) {
++ efhw_nic_close_interrupts(nic);
++ efhw_nic_close_hardware(nic);
++ }
++ EFHW_TRACE("%s: functional units ... done", __func__);
++
++ /* destroy event queues */
++ EFHW_TRACE("%s: event queues ... ", __func__);
++
++ if (nic->interrupting_evq.evq_mask)
++ efhw_keventq_dtor(nic, &nic->interrupting_evq);
++ if (nic->non_interrupting_evq.evq_mask)
++ efhw_keventq_dtor(nic, &nic->non_interrupting_evq);
++
++ EFHW_TRACE("%s: event queues ... done", __func__);
++
++ spin_lock_destroy(&nic->the_reg_lock);
++
++ EFHW_TRACE("%s: DONE", __func__);
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/resource_driver.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/resource_driver.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,600 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains main driver entry points.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include "linux_resource_internal.h"
++#include "kernel_compat.h"
++#include <ci/efrm/nic_table.h>
++#include <ci/driver/resource/efx_vi.h>
++#include <ci/efhw/eventq.h>
++#include <ci/efhw/nic.h>
++#include <ci/efrm/buffer_table.h>
++#include <ci/efrm/vi_resource_private.h>
++#include <ci/efrm/driver_private.h>
++
++MODULE_AUTHOR("Solarflare Communications");
++MODULE_LICENSE("GPL");
++
++static struct efhw_ev_handler ev_handler = {
++ .wakeup_fn = efrm_handle_wakeup_event,
++ .timeout_fn = efrm_handle_timeout_event,
++ .dmaq_flushed_fn = efrm_handle_dmaq_flushed,
++};
++
++const int max_hardware_init_repeats = 10;
++
++/*--------------------------------------------------------------------
++ *
++ * Module load time variables
++ *
++ *--------------------------------------------------------------------*/
++/* See docs/notes/pci_alloc_consistent */
++static int do_irq = 1; /* enable interrupts */
++
++#if defined(CONFIG_X86_XEN)
++static int irq_moderation = 60; /* interrupt moderation (60 usec) */
++#else
++static int irq_moderation = 20; /* interrupt moderation (20 usec) */
++#endif
++static int nic_options = NIC_OPT_DEFAULT;
++int efx_vi_eventq_size = EFX_VI_EVENTQ_SIZE_DEFAULT;
++
++module_param(do_irq, int, S_IRUGO);
++MODULE_PARM_DESC(do_irq, "Enable interrupts. "
++ "Do not turn it off unless you know what are you doing.");
++module_param(irq_moderation, int, S_IRUGO);
++MODULE_PARM_DESC(irq_moderation, "IRQ moderation in usec");
++module_param(nic_options, int, S_IRUGO);
++MODULE_PARM_DESC(nic_options, "Nic options -- see efhw_types.h");
++module_param(efx_vi_eventq_size, int, S_IRUGO);
++MODULE_PARM_DESC(efx_vi_eventq_size,
++ "Size of event queue allocated by efx_vi library");
++
++/*--------------------------------------------------------------------
++ *
++ * Linux specific NIC initialisation
++ *
++ *--------------------------------------------------------------------*/
++
++static inline irqreturn_t
++linux_efrm_interrupt(int irr, void *dev_id)
++{
++ return efhw_nic_interrupt((struct efhw_nic *)dev_id);
++}
++
++int linux_efrm_irq_ctor(struct linux_efhw_nic *lnic)
++{
++ struct efhw_nic *nic = &lnic->efrm_nic.efhw_nic;
++
++ nic->flags &= ~NIC_FLAG_MSI;
++ if (nic->flags & NIC_FLAG_TRY_MSI) {
++ int rc = pci_enable_msi(lnic->pci_dev);
++ if (rc < 0) {
++ EFRM_WARN("%s: Could not enable MSI (%d)",
++ __func__, rc);
++ EFRM_WARN("%s: Continuing with legacy interrupt mode",
++ __func__);
++ } else {
++ EFRM_NOTICE("%s: MSI enabled", __func__);
++ nic->flags |= NIC_FLAG_MSI;
++ }
++ }
++
++ if (request_irq(lnic->pci_dev->irq, linux_efrm_interrupt,
++ IRQF_SHARED, "sfc_resource", nic)) {
++ EFRM_ERR("Request for interrupt #%d failed",
++ lnic->pci_dev->irq);
++ nic->flags &= ~NIC_FLAG_OS_IRQ_EN;
++ return -EBUSY;
++ }
++ nic->flags |= NIC_FLAG_OS_IRQ_EN;
++
++ return 0;
++}
++
++void linux_efrm_irq_dtor(struct linux_efhw_nic *lnic)
++{
++ EFRM_TRACE("%s: start", __func__);
++
++ if (lnic->efrm_nic.efhw_nic.flags & NIC_FLAG_OS_IRQ_EN) {
++ free_irq(lnic->pci_dev->irq, &lnic->efrm_nic.efhw_nic);
++ lnic->efrm_nic.efhw_nic.flags &= ~NIC_FLAG_OS_IRQ_EN;
++ }
++
++ if (lnic->efrm_nic.efhw_nic.flags & NIC_FLAG_MSI) {
++ pci_disable_msi(lnic->pci_dev);
++ lnic->efrm_nic.efhw_nic.flags &= ~NIC_FLAG_MSI;
++ }
++
++ EFRM_TRACE("%s: done", __func__);
++}
++
++/* Allocate buffer table entries for a particular NIC.
++ */
++static int efrm_nic_buffer_table_alloc(struct efhw_nic *nic)
++{
++ int capacity;
++ int page_order;
++ int rc;
++
++ /* Choose queue size. */
++ for (capacity = 8192; capacity <= nic->evq_sizes; capacity <<= 1) {
++ if (capacity > nic->evq_sizes) {
++ EFRM_ERR
++ ("%s: Unable to choose EVQ size (supported=%x)",
++ __func__, nic->evq_sizes);
++ return -E2BIG;
++ } else if (capacity & nic->evq_sizes)
++ break;
++ }
++
++ nic->interrupting_evq.hw.capacity = capacity;
++ nic->interrupting_evq.hw.buf_tbl_alloc.base = (unsigned)-1;
++
++ nic->non_interrupting_evq.hw.capacity = capacity;
++ nic->non_interrupting_evq.hw.buf_tbl_alloc.base = (unsigned)-1;
++
++ /* allocate buffer table entries to map onto the iobuffer */
++ page_order = get_order(capacity * sizeof(efhw_event_t));
++ if (!(nic->flags & NIC_FLAG_NO_INTERRUPT)) {
++ rc = efrm_buffer_table_alloc(page_order,
++ &nic->interrupting_evq
++ .hw.buf_tbl_alloc);
++ if (rc < 0) {
++ EFRM_WARN
++ ("%s: failed (%d) to alloc %d buffer table entries",
++ __func__, rc, page_order);
++ return rc;
++ }
++ }
++ rc = efrm_buffer_table_alloc(page_order,
++ &nic->non_interrupting_evq.hw.
++ buf_tbl_alloc);
++ if (rc < 0) {
++ EFRM_WARN
++ ("%s: failed (%d) to alloc %d buffer table entries",
++ __func__, rc, page_order);
++ return rc;
++ }
++
++ return 0;
++}
++
++/* Free buffer table entries allocated for a particular NIC.
++ */
++static void efrm_nic_buffer_table_free(struct efhw_nic *nic)
++{
++ if (nic->interrupting_evq.hw.buf_tbl_alloc.base != (unsigned)-1)
++ efrm_buffer_table_free(&nic->interrupting_evq.hw
++ .buf_tbl_alloc);
++ if (nic->non_interrupting_evq.hw.buf_tbl_alloc.base != (unsigned)-1)
++ efrm_buffer_table_free(&nic->non_interrupting_evq
++ .hw.buf_tbl_alloc);
++}
++
++static int iomap_bar(struct linux_efhw_nic *lnic, size_t len)
++{
++ volatile char __iomem *ioaddr;
++
++ ioaddr = ioremap_nocache(lnic->ctr_ap_pci_addr, len);
++ if (ioaddr == 0)
++ return -ENOMEM;
++
++ lnic->efrm_nic.efhw_nic.bar_ioaddr = ioaddr;
++ return 0;
++}
++
++static int linux_efhw_nic_map_ctr_ap(struct linux_efhw_nic *lnic)
++{
++ struct efhw_nic *nic = &lnic->efrm_nic.efhw_nic;
++ int rc;
++
++ rc = iomap_bar(lnic, nic->ctr_ap_bytes);
++
++ /* Bug 5195: workaround for now. */
++ if (rc != 0 && nic->ctr_ap_bytes > 16 * 1024 * 1024) {
++ /* Try half the size for now. */
++ nic->ctr_ap_bytes /= 2;
++ EFRM_WARN("Bug 5195 WORKAROUND: retrying iomap of %d bytes",
++ nic->ctr_ap_bytes);
++ rc = iomap_bar(lnic, nic->ctr_ap_bytes);
++ }
++
++ if (rc < 0) {
++ EFRM_ERR("Failed (%d) to map bar (%d bytes)",
++ rc, nic->ctr_ap_bytes);
++ return rc;
++ }
++
++ return rc;
++}
++
++int
++linux_efrm_nic_ctor(struct linux_efhw_nic *lnic, struct pci_dev *dev,
++ spinlock_t *reg_lock,
++ unsigned nic_flags, unsigned nic_options)
++{
++ struct efhw_device_type dev_type;
++ struct efhw_nic *nic = &lnic->efrm_nic.efhw_nic;
++ u8 class_revision;
++ int rc;
++
++ rc = pci_read_config_byte(dev, PCI_CLASS_REVISION, &class_revision);
++ if (rc != 0) {
++ EFRM_ERR("%s: pci_read_config_byte failed (%d)",
++ __func__, rc);
++ return rc;
++ }
++
++ if (!efhw_device_type_init(&dev_type, dev->vendor, dev->device,
++ class_revision)) {
++ EFRM_ERR("%s: efhw_device_type_init failed %04x:%04x(%d)",
++ __func__, (unsigned) dev->vendor,
++ (unsigned) dev->device, (int) class_revision);
++ return -ENODEV;
++ }
++
++ EFRM_NOTICE("attaching device type %04x:%04x %d:%c%d",
++ (unsigned) dev->vendor, (unsigned) dev->device,
++ dev_type.arch, dev_type.variant, dev_type.revision);
++
++ /* Initialise the adapter-structure. */
++ efhw_nic_init(nic, nic_flags, nic_options, dev_type);
++ lnic->pci_dev = dev;
++
++ rc = pci_enable_device(dev);
++ if (rc < 0) {
++ EFRM_ERR("%s: pci_enable_device failed (%d)",
++ __func__, rc);
++ return rc;
++ }
++
++ lnic->ctr_ap_pci_addr = pci_resource_start(dev, nic->ctr_ap_bar);
++
++ if (!pci_dma_supported(dev, (dma_addr_t)EFHW_DMA_ADDRMASK)) {
++ EFRM_ERR("%s: pci_dma_supported(%lx) failed", __func__,
++ (unsigned long)EFHW_DMA_ADDRMASK);
++ return -ENODEV;
++ }
++
++ if (pci_set_dma_mask(dev, (dma_addr_t)EFHW_DMA_ADDRMASK)) {
++ EFRM_ERR("%s: pci_set_dma_mask(%lx) failed", __func__,
++ (unsigned long)EFHW_DMA_ADDRMASK);
++ return -ENODEV;
++ }
++
++ if (pci_set_consistent_dma_mask(dev, (dma_addr_t)EFHW_DMA_ADDRMASK)) {
++ EFRM_ERR("%s: pci_set_consistent_dma_mask(%lx) failed",
++ __func__, (unsigned long)EFHW_DMA_ADDRMASK);
++ return -ENODEV;
++ }
++
++ rc = linux_efhw_nic_map_ctr_ap(lnic);
++ if (rc < 0)
++ return rc;
++
++ /* By default struct efhw_nic contains its own lock for protecting
++ * access to nic registers. We override it with a pointer to the
++ * lock in the net driver. This is needed when resource and net
++ * drivers share a single PCI function (falcon B series).
++ */
++ nic->reg_lock = reg_lock;
++ return 0;
++}
++
++void linux_efrm_nic_dtor(struct linux_efhw_nic *lnic)
++{
++ struct efhw_nic *nic = &lnic->efrm_nic.efhw_nic;
++ volatile char __iomem *bar_ioaddr = nic->bar_ioaddr;
++
++ efhw_nic_dtor(nic);
++
++ /* Unmap the bar. */
++ EFRM_ASSERT(bar_ioaddr);
++ iounmap(bar_ioaddr);
++ nic->bar_ioaddr = 0;
++}
++
++/****************************************************************************
++ *
++ * efrm_tasklet - used to poll the eventq which may result in further callbacks
++ *
++ ****************************************************************************/
++
++static void efrm_tasklet(unsigned long pdev)
++{
++ struct efhw_nic *nic = (struct efhw_nic *)pdev;
++
++ EFRM_ASSERT(!(nic->flags & NIC_FLAG_NO_INTERRUPT));
++
++ efhw_keventq_poll(nic, &nic->interrupting_evq);
++ EFRM_TRACE("%s: complete", __func__);
++}
++
++/****************************************************************************
++ *
++ * char driver specific interrupt callbacks -- run at hard IRQL
++ *
++ ****************************************************************************/
++static void efrm_handle_eventq_irq(struct efhw_nic *nic, int evq)
++{
++ /* NB. The interrupt must have already been acked (for legacy mode). */
++
++ EFRM_TRACE("%s: starting tasklet", __func__);
++ EFRM_ASSERT(!(nic->flags & NIC_FLAG_NO_INTERRUPT));
++
++ tasklet_schedule(&linux_efhw_nic(nic)->tasklet);
++}
++
++/* A count of how many NICs this driver knows about. */
++static int n_nics_probed;
++
++/****************************************************************************
++ *
++ * efrm_nic_add: add the NIC to the resource driver
++ *
++ * NOTE: the flow of control through this routine is quite subtle
++ * because of the number of operations that can fail. We therefore
++ * take the apporaching of keeping the return code (rc) variable
++ * accurate, and only do operations while it is non-negative. Tear down
++ * is done at the end if rc is negative, depending on what has been set up
++ * by that point.
++ *
++ * So basically just make sure that any code you add checks rc>=0 before
++ * doing any work and you'll be fine.
++ *
++ ****************************************************************************/
++int
++efrm_nic_add(struct pci_dev *dev, unsigned flags, const uint8_t *mac_addr,
++ struct linux_efhw_nic **lnic_out, spinlock_t *reg_lock,
++ int bt_min, int bt_lim, int non_irq_evq,
++ const struct vi_resource_dimensions *res_dim)
++{
++ struct linux_efhw_nic *lnic = NULL;
++ struct efhw_nic *nic = NULL;
++ int count = 0, rc = 0, resources_init = 0;
++ int constructed = 0;
++ int registered_nic = 0;
++ int buffers_allocated = 0;
++ static unsigned nic_index; /* = 0; */
++
++ EFRM_TRACE("%s: device detected (Slot '%s', IRQ %d)", __func__,
++ pci_name(dev) ? pci_name(dev) : "?", dev->irq);
++
++ /* Ensure that we have room for the new adapter-structure. */
++ if (efrm_nic_tablep->nic_count == EFHW_MAX_NR_DEVS) {
++ EFRM_WARN("%s: WARNING: too many devices", __func__);
++ rc = -ENOMEM;
++ goto failed;
++ }
++
++ if (n_nics_probed == 0) {
++ rc = efrm_resources_init(res_dim, bt_min, bt_lim);
++ if (rc != 0)
++ goto failed;
++ resources_init = 1;
++ }
++
++ /* Allocate memory for the new adapter-structure. */
++ lnic = kmalloc(sizeof(*lnic), GFP_KERNEL);
++ if (lnic == NULL) {
++ EFRM_ERR("%s: ERROR: failed to allocate memory", __func__);
++ rc = -ENOMEM;
++ goto failed;
++ }
++ memset(lnic, 0, sizeof(*lnic));
++ nic = &lnic->efrm_nic.efhw_nic;
++
++ lnic->ev_handlers = &ev_handler;
++
++ /* OS specific hardware mappings */
++ rc = linux_efrm_nic_ctor(lnic, dev, reg_lock, flags, nic_options);
++ if (rc < 0) {
++ EFRM_ERR("%s: ERROR: initialisation failed", __func__);
++ goto failed;
++ }
++
++ constructed = 1;
++
++ /* Tell the driver about the NIC - this needs to be done before the
++ resources managers get created below. Note we haven't initialised
++ the hardware yet, and I don't like doing this before the perhaps
++ unreliable hardware initialisation. However, there's quite a lot
++ of code to review if we wanted to hardware init before bringing
++ up the resource managers. */
++ rc = efrm_driver_register_nic(&lnic->efrm_nic, nic_index,
++ /* TODO: ifindex */ nic_index);
++ if (rc < 0) {
++ EFRM_ERR("%s: cannot register nic %d with nic error code %d",
++ __func__, efrm_nic_tablep->nic_count, rc);
++ goto failed;
++ }
++ ++nic_index;
++ registered_nic = 1;
++
++ rc = efrm_nic_buffer_table_alloc(nic);
++ if (rc < 0)
++ goto failed;
++ buffers_allocated = 1;
++
++ /****************************************************/
++ /* hardware bringup */
++ /****************************************************/
++ /* Detecting hardware can be a slightly unreliable process;
++ we want to make sure that we maximise our chances, so we
++ loop a few times until all is good. */
++ for (count = 0; count < max_hardware_init_repeats; count++) {
++ rc = efhw_nic_init_hardware(nic, &ev_handler, mac_addr,
++ non_irq_evq);
++ if (rc >= 0)
++ break;
++
++ /* pain */
++ EFRM_ERR
++ ("error - hardware initialisation failed code %d, "
++ "attempt %d of %d", rc, count + 1,
++ max_hardware_init_repeats);
++ }
++ if (rc < 0)
++ goto failed;
++
++ tasklet_init(&lnic->tasklet, efrm_tasklet, (ulong)nic);
++
++ /* set up interrupt handlers (hard-irq) */
++ nic->irq_handler = &efrm_handle_eventq_irq;
++
++ /* this device can now take management interrupts */
++ if (do_irq && !(nic->flags & NIC_FLAG_NO_INTERRUPT)) {
++ rc = linux_efrm_irq_ctor(lnic);
++ if (rc < 0) {
++ EFRM_ERR("Interrupt initialisation failed (%d)", rc);
++ goto failed;
++ }
++ efhw_nic_set_interrupt_moderation(nic, -1, irq_moderation);
++ efhw_nic_interrupt_enable(nic);
++ }
++ EFRM_TRACE("interrupts are %sregistered", do_irq ? "" : "not ");
++
++ *lnic_out = lnic;
++ EFRM_ASSERT(rc == 0);
++ ++n_nics_probed;
++ return 0;
++
++failed:
++ if (buffers_allocated)
++ efrm_nic_buffer_table_free(nic);
++ if (registered_nic)
++ efrm_driver_unregister_nic(&lnic->efrm_nic);
++ if (constructed)
++ linux_efrm_nic_dtor(lnic);
++ kfree(lnic); /* safe in any case */
++ if (resources_init)
++ efrm_resources_fini();
++ return rc;
++}
++
++/****************************************************************************
++ *
++ * efrm_nic_del: Remove the nic from the resource driver structures
++ *
++ ****************************************************************************/
++void efrm_nic_del(struct linux_efhw_nic *lnic)
++{
++ struct efhw_nic *nic = &lnic->efrm_nic.efhw_nic;
++
++ EFRM_TRACE("%s:", __func__);
++ EFRM_ASSERT(nic);
++
++ efrm_nic_buffer_table_free(nic);
++
++ efrm_driver_unregister_nic(&lnic->efrm_nic);
++
++ /*
++ * Synchronise here with any running ISR.
++ * Remove the OS handler. There should be no IRQs being generated
++ * by our NIC at this point.
++ */
++ if (efhw_nic_have_functional_units(nic)) {
++ efhw_nic_close_interrupts(nic);
++ linux_efrm_irq_dtor(lnic);
++ tasklet_kill(&lnic->tasklet);
++ }
++
++ /* Close down hardware and free resources. */
++ linux_efrm_nic_dtor(lnic);
++ kfree(lnic);
++
++ if (--n_nics_probed == 0)
++ efrm_resources_fini();
++
++ EFRM_TRACE("%s: done", __func__);
++}
++
++/****************************************************************************
++ *
++ * init_module: register as a PCI driver.
++ *
++ ****************************************************************************/
++static int init_sfc_resource(void)
++{
++ int rc = 0;
++
++ EFRM_TRACE("%s: RESOURCE driver starting", __func__);
++
++ efrm_driver_ctor();
++
++ /* Register the driver so that our 'probe' function is called for
++ * each EtherFabric device in the system.
++ */
++ rc = efrm_driverlink_register();
++ if (rc == -ENODEV)
++ EFRM_ERR("%s: no devices found", __func__);
++ if (rc < 0)
++ goto failed_driverlink;
++
++ if (efrm_install_proc_entries() != 0) {
++ /* Do not fail, but print a warning */
++ EFRM_WARN("%s: WARNING: failed to install /proc entries",
++ __func__);
++ }
++
++ return 0;
++
++failed_driverlink:
++ efrm_driver_dtor();
++ return rc;
++}
++
++/****************************************************************************
++ *
++ * cleanup_module: module-removal entry-point
++ *
++ ****************************************************************************/
++static void cleanup_sfc_resource(void)
++{
++ efrm_uninstall_proc_entries();
++
++ efrm_driverlink_unregister();
++
++ /* Clean up char-driver specific initialisation.
++ - driver dtor can use both work queue and buffer table entries */
++ efrm_driver_dtor();
++
++ EFRM_TRACE("%s: unloaded", __func__);
++}
++
++module_init(init_sfc_resource);
++module_exit(cleanup_sfc_resource);
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/resource_manager.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/resource_manager.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,145 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains generic code for resources and resource managers.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/debug.h>
++#include <ci/efrm/nic_table.h>
++#include <ci/efhw/iopage.h>
++#include <ci/efrm/driver_private.h>
++#include <ci/efrm/private.h>
++#include "efrm_internal.h"
++
++/**********************************************************************
++ * struct efrm_resource_manager
++ */
++
++void efrm_resource_manager_dtor(struct efrm_resource_manager *rm)
++{
++ EFRM_RESOURCE_MANAGER_ASSERT_VALID(rm);
++
++ /* call destructor */
++ EFRM_DO_DEBUG(if (rm->rm_resources)
++ EFRM_ERR("%s: %s leaked %d resources",
++ __func__, rm->rm_name, rm->rm_resources));
++ EFRM_ASSERT(rm->rm_resources == 0);
++ EFRM_ASSERT(list_empty(&rm->rm_resources_list));
++
++ rm->rm_dtor(rm);
++
++ /* clear out things built by efrm_resource_manager_ctor */
++ spin_lock_destroy(&rm->rm_lock);
++
++ /* and the free the memory */
++ EFRM_DO_DEBUG(memset(rm, 0, sizeof(*rm)));
++ kfree(rm);
++}
++
++/* Construct a resource manager. Resource managers are singletons. */
++int
++efrm_resource_manager_ctor(struct efrm_resource_manager *rm,
++ void (*dtor)(struct efrm_resource_manager *),
++ const char *name, unsigned type)
++{
++ EFRM_ASSERT(rm);
++ EFRM_ASSERT(dtor);
++
++ rm->rm_name = name;
++ EFRM_DO_DEBUG(rm->rm_type = type);
++ rm->rm_dtor = dtor;
++ spin_lock_init(&rm->rm_lock);
++ rm->rm_resources = 0;
++ rm->rm_resources_hiwat = 0;
++ INIT_LIST_HEAD(&rm->rm_resources_list);
++ EFRM_RESOURCE_MANAGER_ASSERT_VALID(rm);
++ return 0;
++}
++
++
++void efrm_client_add_resource(struct efrm_client *client,
++ struct efrm_resource *rs)
++{
++ struct efrm_resource_manager *rm;
++ irq_flags_t lock_flags;
++
++ EFRM_ASSERT(client != NULL);
++ EFRM_ASSERT(rs != NULL);
++
++ spin_lock_irqsave(&efrm_nic_tablep->lock, lock_flags);
++ rm = efrm_rm_table[EFRM_RESOURCE_TYPE(rs->rs_handle)];
++ ++rm->rm_resources;
++ list_add(&rs->rs_manager_link, &rm->rm_resources_list);
++ if (rm->rm_resources > rm->rm_resources_hiwat)
++ rm->rm_resources_hiwat = rm->rm_resources;
++ rs->rs_client = client;
++ ++client->ref_count;
++ list_add(&rs->rs_client_link, &client->resources);
++ spin_unlock_irqrestore(&efrm_nic_tablep->lock, lock_flags);
++}
++
++
++void efrm_resource_ref(struct efrm_resource *rs)
++{
++ irq_flags_t lock_flags;
++ spin_lock_irqsave(&efrm_nic_tablep->lock, lock_flags);
++ ++rs->rs_ref_count;
++ spin_unlock_irqrestore(&efrm_nic_tablep->lock, lock_flags);
++}
++EXPORT_SYMBOL(efrm_resource_ref);
++
++
++int __efrm_resource_release(struct efrm_resource *rs)
++{
++ struct efrm_resource_manager *rm;
++ irq_flags_t lock_flags;
++ int free_rs;
++
++ spin_lock_irqsave(&efrm_nic_tablep->lock, lock_flags);
++ free_rs = --rs->rs_ref_count == 0;
++ if (free_rs) {
++ rm = efrm_rm_table[EFRM_RESOURCE_TYPE(rs->rs_handle)];
++ EFRM_ASSERT(rm->rm_resources > 0);
++ --rm->rm_resources;
++ list_del(&rs->rs_manager_link);
++ list_del(&rs->rs_client_link);
++ }
++ spin_unlock_irqrestore(&efrm_nic_tablep->lock, lock_flags);
++ return free_rs;
++}
++EXPORT_SYMBOL(__efrm_resource_release);
++
++/*
++ * vi: sw=8:ai:aw
++ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/resources.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/resources.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,94 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains resource managers initialisation functions.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/private.h>
++#include <ci/efrm/buffer_table.h>
++
++int
++efrm_resources_init(const struct vi_resource_dimensions *vi_res_dim,
++ int buffer_table_min, int buffer_table_lim)
++{
++ int i, rc;
++
++ rc = efrm_buffer_table_ctor(buffer_table_min, buffer_table_lim);
++ if (rc != 0)
++ return rc;
++
++ /* Create resources in the correct order */
++ for (i = 0; i < EFRM_RESOURCE_NUM; ++i) {
++ struct efrm_resource_manager **rmp = &efrm_rm_table[i];
++
++ EFRM_ASSERT(*rmp == NULL);
++ switch (i) {
++ case EFRM_RESOURCE_VI:
++ rc = efrm_create_vi_resource_manager(rmp,
++ vi_res_dim);
++ break;
++ case EFRM_RESOURCE_FILTER:
++ rc = efrm_create_filter_resource_manager(rmp);
++ break;
++ case EFRM_RESOURCE_IOBUFSET:
++ rc = efrm_create_iobufset_resource_manager(rmp);
++ break;
++ default:
++ rc = 0;
++ break;
++ }
++
++ if (rc < 0) {
++ EFRM_ERR("%s: failed type=%d (%d)",
++ __func__, i, rc);
++ efrm_buffer_table_dtor();
++ return rc;
++ }
++ }
++
++ return 0;
++}
++
++void efrm_resources_fini(void)
++{
++ int i;
++
++ for (i = EFRM_RESOURCE_NUM - 1; i >= 0; --i)
++ if (efrm_rm_table[i]) {
++ efrm_resource_manager_dtor(efrm_rm_table[i]);
++ efrm_rm_table[i] = NULL;
++ }
++
++ efrm_buffer_table_dtor();
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/vi_resource_alloc.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/vi_resource_alloc.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,820 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains allocation of VI resources.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/nic_table.h>
++#include <ci/efhw/iopage.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efhw/public.h>
++#include <ci/efhw/falcon.h>
++#include <ci/efrm/private.h>
++#include <ci/efrm/buffer_table.h>
++#include <ci/efrm/vi_resource_private.h>
++#include <ci/efrm/efrm_client.h>
++#include "efrm_internal.h"
++
++
++/*** Data definitions ****************************************************/
++
++static const char *dmaq_names[] = { "TX", "RX" };
++
++struct vi_resource_manager *efrm_vi_manager;
++
++/*** Forward references **************************************************/
++
++static int
++efrm_vi_resource_alloc_or_free(struct efrm_client *client,
++ int alloc, struct vi_resource *evq_virs,
++ uint16_t vi_flags, int32_t evq_capacity,
++ int32_t txq_capacity, int32_t rxq_capacity,
++ uint8_t tx_q_tag, uint8_t rx_q_tag,
++ struct vi_resource **virs_in_out);
++
++/*** Reference count handling ********************************************/
++
++static inline void efrm_vi_rm_get_ref(struct vi_resource *virs)
++{
++ atomic_inc(&virs->evq_refs);
++}
++
++static inline void efrm_vi_rm_drop_ref(struct vi_resource *virs)
++{
++ EFRM_ASSERT(atomic_read(&virs->evq_refs) != 0);
++ if (atomic_dec_and_test(&virs->evq_refs))
++ efrm_vi_resource_alloc_or_free(virs->rs.rs_client, false, NULL,
++ 0, 0, 0, 0, 0, 0, &virs);
++}
++
++/*** Instance numbers ****************************************************/
++
++static inline int efrm_vi_rm_alloc_id(uint16_t vi_flags, int32_t evq_capacity)
++{
++ irq_flags_t lock_flags;
++ int instance;
++ int rc;
++
++ if (efrm_nic_tablep->a_nic == NULL) /* ?? FIXME: surely not right */
++ return -ENODEV;
++
++ spin_lock_irqsave(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ /* Falcon A1 RX phys addr wierdness. */
++ if (efrm_nic_tablep->a_nic->devtype.variant == 'A' &&
++ (vi_flags & EFHW_VI_RX_PHYS_ADDR_EN)) {
++ if (vi_flags & EFHW_VI_JUMBO_EN) {
++ /* Falcon-A cannot do phys + scatter. */
++ EFRM_WARN
++ ("%s: falcon-A does not support phys+scatter mode",
++ __func__);
++ instance = -1;
++ } else if (efrm_vi_manager->iscsi_dmaq_instance_is_free
++ && evq_capacity == 0) {
++ /* Falcon-A has a single RXQ that gives the correct
++ * semantics for physical addressing. However, it
++ * happens to have the same instance number as the
++ * 'char' event queue, so we cannot also hand out
++ * the event queue. */
++ efrm_vi_manager->iscsi_dmaq_instance_is_free = false;
++ instance = FALCON_A1_ISCSI_DMAQ;
++ } else {
++ EFRM_WARN("%s: iSCSI receive queue not free",
++ __func__);
++ instance = -1;
++ }
++ goto unlock_out;
++ }
++
++ if (vi_flags & EFHW_VI_RM_WITH_INTERRUPT) {
++ rc = __kfifo_get(efrm_vi_manager->instances_with_interrupt,
++ (unsigned char *)&instance, sizeof(instance));
++ if (rc != sizeof(instance)) {
++ EFRM_ASSERT(rc == 0);
++ instance = -1;
++ }
++ goto unlock_out;
++ }
++
++ /* Otherwise a normal run-of-the-mill VI. */
++ rc = __kfifo_get(efrm_vi_manager->instances_with_timer,
++ (unsigned char *)&instance, sizeof(instance));
++ if (rc != sizeof(instance)) {
++ EFRM_ASSERT(rc == 0);
++ instance = -1;
++ }
++
++unlock_out:
++ spin_unlock_irqrestore(&efrm_vi_manager->rm.rm_lock, lock_flags);
++ return instance;
++}
++
++static void efrm_vi_rm_free_id(int instance)
++{
++ irq_flags_t lock_flags;
++ struct kfifo *instances;
++
++ if (efrm_nic_tablep->a_nic == NULL) /* ?? FIXME: surely not right */
++ return;
++
++ if (efrm_nic_tablep->a_nic->devtype.variant == 'A' &&
++ instance == FALCON_A1_ISCSI_DMAQ) {
++ EFRM_ASSERT(efrm_vi_manager->iscsi_dmaq_instance_is_free ==
++ false);
++ spin_lock_irqsave(&efrm_vi_manager->rm.rm_lock, lock_flags);
++ efrm_vi_manager->iscsi_dmaq_instance_is_free = true;
++ spin_unlock_irqrestore(&efrm_vi_manager->rm.rm_lock,
++ lock_flags);
++ } else {
++ if (instance >= efrm_vi_manager->with_timer_base &&
++ instance < efrm_vi_manager->with_timer_limit) {
++ instances = efrm_vi_manager->instances_with_timer;
++ } else {
++ EFRM_ASSERT(instance >=
++ efrm_vi_manager->with_interrupt_base);
++ EFRM_ASSERT(instance <
++ efrm_vi_manager->with_interrupt_limit);
++ instances = efrm_vi_manager->instances_with_interrupt;
++ }
++
++ EFRM_VERIFY_EQ(kfifo_put(instances, (unsigned char *)&instance,
++ sizeof(instance)), sizeof(instance));
++ }
++}
++
++/*** Queue sizes *********************************************************/
++
++/* NB. This should really take a nic as an argument, but that makes
++ * the buffer table allocation difficult. */
++uint32_t efrm_vi_rm_evq_bytes(struct vi_resource *virs
++ /*,struct efhw_nic *nic */)
++{
++ return virs->evq_capacity * sizeof(efhw_event_t);
++}
++EXPORT_SYMBOL(efrm_vi_rm_evq_bytes);
++
++/* NB. This should really take a nic as an argument, but that makes
++ * the buffer table allocation difficult. */
++uint32_t efrm_vi_rm_txq_bytes(struct vi_resource *virs
++ /*,struct efhw_nic *nic */)
++{
++ return virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX] *
++ FALCON_DMA_TX_DESC_BYTES;
++}
++EXPORT_SYMBOL(efrm_vi_rm_txq_bytes);
++
++/* NB. This should really take a nic as an argument, but that makes
++ * the buffer table allocation difficult. */
++uint32_t efrm_vi_rm_rxq_bytes(struct vi_resource *virs
++ /*,struct efhw_nic *nic */)
++{
++ uint32_t bytes_per_desc = ((virs->flags & EFHW_VI_RX_PHYS_ADDR_EN)
++ ? FALCON_DMA_RX_PHYS_DESC_BYTES
++ : FALCON_DMA_RX_BUF_DESC_BYTES);
++ return virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX] * bytes_per_desc;
++}
++EXPORT_SYMBOL(efrm_vi_rm_rxq_bytes);
++
++static int choose_size(int size_rq, unsigned sizes)
++{
++ int size;
++
++ /* size_rq < 0 means default, but we interpret this as 'minimum'. */
++
++ for (size = 256;; size <<= 1)
++ if ((size & sizes) && size >= size_rq)
++ return size;
++ else if ((sizes & ~((size - 1) | size)) == 0)
++ return -1;
++}
++
++static int
++efrm_vi_rm_adjust_alloc_request(struct vi_resource *virs, struct efhw_nic *nic)
++{
++ int capacity;
++
++ EFRM_ASSERT(nic->efhw_func);
++
++ if (virs->evq_capacity) {
++ capacity = choose_size(virs->evq_capacity, nic->evq_sizes);
++ if (capacity < 0) {
++ EFRM_ERR("vi_resource: bad evq size %d (supported=%x)",
++ virs->evq_capacity, nic->evq_sizes);
++ return -E2BIG;
++ }
++ virs->evq_capacity = capacity;
++ }
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX]) {
++ capacity =
++ choose_size(virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX],
++ nic->txq_sizes);
++ if (capacity < 0) {
++ EFRM_ERR("vi_resource: bad txq size %d (supported=%x)",
++ virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX],
++ nic->txq_sizes);
++ return -E2BIG;
++ }
++ virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX] = capacity;
++ }
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX]) {
++ capacity =
++ choose_size(virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX],
++ nic->rxq_sizes);
++ if (capacity < 0) {
++ EFRM_ERR("vi_resource: bad rxq size %d (supported=%x)",
++ virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX],
++ nic->rxq_sizes);
++ return -E2BIG;
++ }
++ virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX] = capacity;
++ }
++
++ return 0;
++}
++
++/* remove the reference to the event queue in this VI resource and decrement
++ the event queue's use count */
++static inline void efrm_vi_rm_detach_evq(struct vi_resource *virs)
++{
++ struct vi_resource *evq_virs;
++
++ EFRM_ASSERT(virs != NULL);
++
++ evq_virs = virs->evq_virs;
++
++ if (evq_virs != NULL) {
++ virs->evq_virs = NULL;
++ if (evq_virs == virs) {
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT
++ " had internal event queue ", __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle));
++ } else {
++ efrm_vi_rm_drop_ref(evq_virs);
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT " had event queue "
++ EFRM_RESOURCE_FMT, __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle),
++ EFRM_RESOURCE_PRI_ARG(evq_virs->rs.
++ rs_handle));
++ }
++ } else {
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT
++ " had no event queue (nothing to do)",
++ __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle));
++ }
++}
++
++/*** Buffer Table allocations ********************************************/
++
++static int
++efrm_vi_rm_alloc_or_free_buffer_table(struct vi_resource *virs, bool is_alloc)
++{
++ uint32_t bytes;
++ int page_order;
++ int rc;
++
++ if (!is_alloc)
++ goto destroy;
++
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX]) {
++ bytes = efrm_vi_rm_txq_bytes(virs);
++ page_order = get_order(bytes);
++ rc = efrm_buffer_table_alloc(page_order,
++ (virs->dmaq_buf_tbl_alloc +
++ EFRM_VI_RM_DMA_QUEUE_TX));
++ if (rc != 0) {
++ EFRM_TRACE
++ ("%s: Error %d allocating TX buffer table entry",
++ __func__, rc);
++ goto fail_txq_alloc;
++ }
++ }
++
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX]) {
++ bytes = efrm_vi_rm_rxq_bytes(virs);
++ page_order = get_order(bytes);
++ rc = efrm_buffer_table_alloc(page_order,
++ (virs->dmaq_buf_tbl_alloc +
++ EFRM_VI_RM_DMA_QUEUE_RX));
++ if (rc != 0) {
++ EFRM_TRACE
++ ("%s: Error %d allocating RX buffer table entry",
++ __func__, rc);
++ goto fail_rxq_alloc;
++ }
++ }
++ return 0;
++
++destroy:
++ rc = 0;
++
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX]) {
++ efrm_buffer_table_free(&virs->
++ dmaq_buf_tbl_alloc
++ [EFRM_VI_RM_DMA_QUEUE_RX]);
++ }
++fail_rxq_alloc:
++
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX]) {
++ efrm_buffer_table_free(&virs->
++ dmaq_buf_tbl_alloc
++ [EFRM_VI_RM_DMA_QUEUE_TX]);
++ }
++fail_txq_alloc:
++
++ return rc;
++}
++
++/*** Per-NIC allocations *************************************************/
++
++static inline int
++efrm_vi_rm_init_evq(struct vi_resource *virs, struct efhw_nic *nic)
++{
++ int instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++ struct eventq_resource_hardware *evq_hw =
++ &virs->nic_info.evq_pages;
++ uint32_t buf_bytes = efrm_vi_rm_evq_bytes(virs);
++ int rc;
++
++ if (virs->evq_capacity == 0)
++ return 0;
++ evq_hw->capacity = virs->evq_capacity;
++
++ /* Allocate buffer table entries to map onto the iobuffer. This
++ * currently allocates its own buffer table entries on Falcon which is
++ * a bit wasteful on a multi-NIC system. */
++ evq_hw->buf_tbl_alloc.base = (unsigned)-1;
++ rc = efrm_buffer_table_alloc(get_order(buf_bytes),
++ &evq_hw->buf_tbl_alloc);
++ if (rc < 0) {
++ EFHW_WARN("%s: failed (%d) to alloc %d buffer table entries",
++ __func__, rc, get_order(buf_bytes));
++ return rc;
++ }
++
++ /* Allocate the event queue memory. */
++ rc = efhw_nic_event_queue_alloc_iobuffer(nic, evq_hw, instance,
++ buf_bytes);
++ if (rc != 0) {
++ EFRM_ERR("%s: Error allocating iobuffer: %d", __func__, rc);
++ efrm_buffer_table_free(&evq_hw->buf_tbl_alloc);
++ return rc;
++ }
++
++ /* Initialise the event queue hardware */
++ efhw_nic_event_queue_enable(nic, instance, virs->evq_capacity,
++ efhw_iopages_dma_addr(&evq_hw->iobuff) +
++ evq_hw->iobuff_off,
++ evq_hw->buf_tbl_alloc.base,
++ instance < 64);
++
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT " capacity=%u", __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle),
++ virs->evq_capacity);
++
++#if defined(__ia64__)
++ /* Page size may be large, so for now just increase the
++ * size of the requested evq up to a round number of
++ * pages
++ */
++ buf_bytes = CI_ROUNDUP(buf_bytes, PAGE_SIZE);
++#endif
++ EFRM_ASSERT(buf_bytes % PAGE_SIZE == 0);
++
++ virs->mem_mmap_bytes += buf_bytes;
++
++ return 0;
++}
++
++static inline void
++efrm_vi_rm_fini_evq(struct vi_resource *virs, struct efhw_nic *nic)
++{
++ int instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++ struct vi_resource_nic_info *nic_info = &virs->nic_info;
++
++ if (virs->evq_capacity == 0)
++ return;
++
++ /* Zero the timer-value for this queue.
++ And Tell NIC to stop using this event queue. */
++ efhw_nic_event_queue_disable(nic, instance, 0);
++
++ if (nic_info->evq_pages.buf_tbl_alloc.base != (unsigned)-1)
++ efrm_buffer_table_free(&nic_info->evq_pages.buf_tbl_alloc);
++
++ efhw_iopages_free(nic, &nic_info->evq_pages.iobuff);
++}
++
++/*! FIXME: we should make sure this number is never zero (=> unprotected) */
++/*! FIXME: put this definition in a relevant header (e.g. as (evqid)+1) */
++#define EFAB_EVQ_OWNER_ID(evqid) ((evqid))
++
++void
++efrm_vi_rm_init_dmaq(struct vi_resource *virs, int queue_type,
++ struct efhw_nic *nic)
++{
++ int instance;
++ int evq_instance;
++ efhw_buffer_addr_t buf_addr;
++
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++ evq_instance = EFRM_RESOURCE_INSTANCE(virs->evq_virs->rs.rs_handle);
++
++ buf_addr = virs->dmaq_buf_tbl_alloc[queue_type].base;
++
++ if (queue_type == EFRM_VI_RM_DMA_QUEUE_TX) {
++ efhw_nic_dmaq_tx_q_init(nic,
++ instance, /* dmaq */
++ evq_instance, /* evq */
++ EFAB_EVQ_OWNER_ID(evq_instance), /* owner */
++ virs->dmaq_tag[queue_type], /* tag */
++ virs->dmaq_capacity[queue_type], /* size of queue */
++ buf_addr, /* buffer index */
++ virs->flags); /* user specified Q attrs */
++ } else {
++ efhw_nic_dmaq_rx_q_init(nic,
++ instance, /* dmaq */
++ evq_instance, /* evq */
++ EFAB_EVQ_OWNER_ID(evq_instance), /* owner */
++ virs->dmaq_tag[queue_type], /* tag */
++ virs->dmaq_capacity[queue_type], /* size of queue */
++ buf_addr, /* buffer index */
++ virs->flags); /* user specified Q attrs */
++ }
++}
++
++static int
++efrm_vi_rm_init_or_fini_dmaq(struct vi_resource *virs,
++ int queue_type, int init,
++ struct efhw_nic *nic)
++{
++ int rc;
++ int instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++ uint32_t buf_bytes;
++ struct vi_resource_nic_info *nic_info = &virs->nic_info;
++ int page_order;
++ uint32_t num_pages;
++ struct efhw_iopages *iobuff;
++
++ if (!init)
++ goto destroy;
++
++ /* Ignore disabled queues. */
++ if (virs->dmaq_capacity[queue_type] == 0) {
++ if (queue_type == EFRM_VI_RM_DMA_QUEUE_TX)
++ efhw_nic_dmaq_tx_q_disable(nic, instance);
++ else
++ efhw_nic_dmaq_rx_q_disable(nic, instance);
++ return 0;
++ }
++
++ buf_bytes = (queue_type == EFRM_VI_RM_DMA_QUEUE_TX
++ ? efrm_vi_rm_txq_bytes(virs)
++ : efrm_vi_rm_rxq_bytes(virs));
++
++ page_order = get_order(buf_bytes);
++
++ rc = efhw_iopages_alloc(nic, &nic_info->dmaq_pages[queue_type],
++ page_order);
++ if (rc != 0) {
++ EFRM_ERR("%s: Failed to allocate %s DMA buffer.", __func__,
++ dmaq_names[queue_type]);
++ goto fail_iopages;
++ }
++
++ num_pages = 1 << page_order;
++ iobuff = &nic_info->dmaq_pages[queue_type];
++ efhw_nic_buffer_table_set_n(nic,
++ virs->dmaq_buf_tbl_alloc[queue_type].base,
++ efhw_iopages_dma_addr(iobuff),
++ EFHW_NIC_PAGE_SIZE, 0, num_pages, 0);
++
++ falcon_nic_buffer_table_confirm(nic);
++
++ virs->mem_mmap_bytes += roundup(buf_bytes, PAGE_SIZE);
++
++ /* Make sure there is an event queue. */
++ if (virs->evq_virs->evq_capacity <= 0) {
++ EFRM_ERR("%s: Cannot use empty event queue for %s DMA",
++ __func__, dmaq_names[queue_type]);
++ rc = -EINVAL;
++ goto fail_evq;
++ }
++
++ efrm_vi_rm_init_dmaq(virs, queue_type, nic);
++
++ return 0;
++
++destroy:
++ rc = 0;
++
++ /* Ignore disabled queues. */
++ if (virs->dmaq_capacity[queue_type] == 0)
++ return 0;
++
++ /* Ensure TX pacing turned off -- queue flush doesn't reset this. */
++ if (queue_type == EFRM_VI_RM_DMA_QUEUE_TX)
++ falcon_nic_pace(nic, instance, 0);
++
++ /* No need to disable the queue here. Nobody is using it anyway. */
++
++fail_evq:
++ efhw_iopages_free(nic, &nic_info->dmaq_pages[queue_type]);
++fail_iopages:
++
++ return rc;
++}
++
++static int
++efrm_vi_rm_init_or_fini_nic(struct vi_resource *virs, int init,
++ struct efhw_nic *nic)
++{
++ int rc;
++#ifndef NDEBUG
++ int instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++#endif
++
++ if (!init)
++ goto destroy;
++
++ rc = efrm_vi_rm_init_evq(virs, nic);
++ if (rc != 0)
++ goto fail_evq;
++
++ rc = efrm_vi_rm_init_or_fini_dmaq(virs, EFRM_VI_RM_DMA_QUEUE_TX,
++ init, nic);
++ if (rc != 0)
++ goto fail_txq;
++
++ rc = efrm_vi_rm_init_or_fini_dmaq(virs, EFRM_VI_RM_DMA_QUEUE_RX,
++ init, nic);
++ if (rc != 0)
++ goto fail_rxq;
++
++ /* Allocate space for the control page. */
++ EFRM_ASSERT(falcon_tx_dma_page_offset(instance) < PAGE_SIZE);
++ EFRM_ASSERT(falcon_rx_dma_page_offset(instance) < PAGE_SIZE);
++ EFRM_ASSERT(falcon_timer_page_offset(instance) < PAGE_SIZE);
++ virs->bar_mmap_bytes += PAGE_SIZE;
++
++ return 0;
++
++destroy:
++ rc = 0;
++
++ efrm_vi_rm_init_or_fini_dmaq(virs, EFRM_VI_RM_DMA_QUEUE_RX,
++ false, nic);
++fail_rxq:
++
++ efrm_vi_rm_init_or_fini_dmaq(virs, EFRM_VI_RM_DMA_QUEUE_TX,
++ false, nic);
++fail_txq:
++
++ efrm_vi_rm_fini_evq(virs, nic);
++fail_evq:
++
++ EFRM_ASSERT(rc != 0 || !init);
++ return rc;
++}
++
++static int
++efrm_vi_resource_alloc_or_free(struct efrm_client *client,
++ int alloc, struct vi_resource *evq_virs,
++ uint16_t vi_flags, int32_t evq_capacity,
++ int32_t txq_capacity, int32_t rxq_capacity,
++ uint8_t tx_q_tag, uint8_t rx_q_tag,
++ struct vi_resource **virs_in_out)
++{
++ struct efhw_nic *nic = client->nic;
++ struct vi_resource *virs;
++ int rc;
++ int instance;
++
++ EFRM_ASSERT(virs_in_out);
++ EFRM_ASSERT(efrm_vi_manager);
++ EFRM_RESOURCE_MANAGER_ASSERT_VALID(&efrm_vi_manager->rm);
++
++ if (!alloc)
++ goto destroy;
++
++ rx_q_tag &= (1 << TX_DESCQ_LABEL_WIDTH) - 1;
++ tx_q_tag &= (1 << RX_DESCQ_LABEL_WIDTH) - 1;
++
++ virs = kmalloc(sizeof(*virs), GFP_KERNEL);
++ if (virs == NULL) {
++ EFRM_ERR("%s: Error allocating VI resource object",
++ __func__);
++ rc = -ENOMEM;
++ goto fail_alloc;
++ }
++ memset(virs, 0, sizeof(*virs));
++
++ /* Some macros make the assumption that the struct efrm_resource is
++ * the first member of a struct vi_resource. */
++ EFRM_ASSERT(&virs->rs == (struct efrm_resource *) (virs));
++
++ instance = efrm_vi_rm_alloc_id(vi_flags, evq_capacity);
++ if (instance < 0) {
++ /* Clear out the close list... */
++ efrm_vi_rm_salvage_flushed_vis();
++ instance = efrm_vi_rm_alloc_id(vi_flags, evq_capacity);
++ if (instance >= 0)
++ EFRM_TRACE("%s: Salvaged a closed VI.", __func__);
++ }
++
++ if (instance < 0) {
++ /* Could flush resources and try again here. */
++ EFRM_ERR("%s: Out of appropriate VI resources", __func__);
++ rc = -EBUSY;
++ goto fail_alloc_id;
++ }
++
++ EFRM_TRACE("%s: new VI ID %d", __func__, instance);
++ efrm_resource_init(&virs->rs, EFRM_RESOURCE_VI, instance);
++
++ /* Start with one reference. Any external VIs using the EVQ of this
++ * resource will increment this reference rather than the resource
++ * reference to avoid DMAQ flushes from waiting for other DMAQ
++ * flushes to complete. When the resource reference goes to zero,
++ * the DMAQ flush happens. When the flush completes, this reference
++ * is decremented. When this reference reaches zero, the instance
++ * is freed. */
++ atomic_set(&virs->evq_refs, 1);
++
++ virs->bar_mmap_bytes = 0;
++ virs->mem_mmap_bytes = 0;
++ virs->evq_capacity = evq_capacity;
++ virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX] = txq_capacity;
++ virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX] = rxq_capacity;
++ virs->dmaq_tag[EFRM_VI_RM_DMA_QUEUE_TX] = tx_q_tag;
++ virs->dmaq_tag[EFRM_VI_RM_DMA_QUEUE_RX] = rx_q_tag;
++ virs->flags = vi_flags;
++ INIT_LIST_HEAD(&virs->tx_flush_link);
++ INIT_LIST_HEAD(&virs->rx_flush_link);
++ virs->tx_flushing = 0;
++ virs->rx_flushing = 0;
++
++ /* Adjust the queue sizes. */
++ rc = efrm_vi_rm_adjust_alloc_request(virs, nic);
++ if (rc != 0)
++ goto fail_adjust_request;
++
++ /* Attach the EVQ early so that we can ensure that the NIC sets
++ * match. */
++ if (evq_virs == NULL) {
++ evq_virs = virs;
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT
++ " has no external event queue", __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle));
++ } else {
++ /* Make sure the resource managers are the same. */
++ if (EFRM_RESOURCE_TYPE(evq_virs->rs.rs_handle) !=
++ EFRM_RESOURCE_VI) {
++ EFRM_ERR("%s: Mismatched owner for event queue VI "
++ EFRM_RESOURCE_FMT, __func__,
++ EFRM_RESOURCE_PRI_ARG(evq_virs->rs.rs_handle));
++ return -EINVAL;
++ }
++ EFRM_ASSERT(atomic_read(&evq_virs->evq_refs) != 0);
++ efrm_vi_rm_get_ref(evq_virs);
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT " uses event queue "
++ EFRM_RESOURCE_FMT,
++ __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle),
++ EFRM_RESOURCE_PRI_ARG(evq_virs->rs.rs_handle));
++ }
++ virs->evq_virs = evq_virs;
++
++ rc = efrm_vi_rm_alloc_or_free_buffer_table(virs, true);
++ if (rc != 0)
++ goto fail_buffer_table;
++
++ rc = efrm_vi_rm_init_or_fini_nic(virs, true, nic);
++ if (rc != 0)
++ goto fail_init_nic;
++
++ efrm_client_add_resource(client, &virs->rs);
++ *virs_in_out = virs;
++ EFRM_TRACE("%s: Allocated " EFRM_RESOURCE_FMT, __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle));
++ return 0;
++
++destroy:
++ virs = *virs_in_out;
++ EFRM_RESOURCE_ASSERT_VALID(&virs->rs, 1);
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++
++ EFRM_TRACE("%s: Freeing %d", __func__,
++ EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle));
++
++ /* Destroying the VI. The reference count must be zero. */
++ EFRM_ASSERT(atomic_read(&virs->evq_refs) == 0);
++
++ /* The EVQ should have gone (and DMA disabled) so that this
++ * function can't be re-entered to destroy the EVQ VI. */
++ EFRM_ASSERT(virs->evq_virs == NULL);
++ rc = 0;
++
++fail_init_nic:
++ efrm_vi_rm_init_or_fini_nic(virs, false, nic);
++
++ efrm_vi_rm_alloc_or_free_buffer_table(virs, false);
++fail_buffer_table:
++
++ efrm_vi_rm_detach_evq(virs);
++
++fail_adjust_request:
++
++ EFRM_ASSERT(virs->evq_callback_fn == NULL);
++ EFRM_TRACE("%s: delete VI ID %d", __func__, instance);
++ efrm_vi_rm_free_id(instance);
++fail_alloc_id:
++ if (!alloc)
++ efrm_client_put(virs->rs.rs_client);
++ EFRM_DO_DEBUG(memset(virs, 0, sizeof(*virs)));
++ kfree(virs);
++fail_alloc:
++ *virs_in_out = NULL;
++
++ return rc;
++}
++
++/*** Resource object ****************************************************/
++
++int
++efrm_vi_resource_alloc(struct efrm_client *client,
++ struct vi_resource *evq_virs,
++ uint16_t vi_flags, int32_t evq_capacity,
++ int32_t txq_capacity, int32_t rxq_capacity,
++ uint8_t tx_q_tag, uint8_t rx_q_tag,
++ struct vi_resource **virs_out,
++ uint32_t *out_io_mmap_bytes,
++ uint32_t *out_mem_mmap_bytes,
++ uint32_t *out_txq_capacity, uint32_t *out_rxq_capacity)
++{
++ int rc;
++ EFRM_ASSERT(client != NULL);
++ rc = efrm_vi_resource_alloc_or_free(client, true, evq_virs, vi_flags,
++ evq_capacity, txq_capacity,
++ rxq_capacity, tx_q_tag, rx_q_tag,
++ virs_out);
++ if (rc == 0) {
++ if (out_io_mmap_bytes != NULL)
++ *out_io_mmap_bytes = (*virs_out)->bar_mmap_bytes;
++ if (out_mem_mmap_bytes != NULL)
++ *out_mem_mmap_bytes = (*virs_out)->mem_mmap_bytes;
++ if (out_txq_capacity != NULL)
++ *out_txq_capacity =
++ (*virs_out)->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX];
++ if (out_rxq_capacity != NULL)
++ *out_rxq_capacity =
++ (*virs_out)->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX];
++ }
++
++ return rc;
++}
++EXPORT_SYMBOL(efrm_vi_resource_alloc);
++
++void efrm_vi_rm_free_flushed_resource(struct vi_resource *virs)
++{
++ EFRM_ASSERT(virs != NULL);
++ EFRM_ASSERT(virs->rs.rs_ref_count == 0);
++
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT, __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle));
++ /* release the associated event queue then drop our own reference
++ * count */
++ efrm_vi_rm_detach_evq(virs);
++ efrm_vi_rm_drop_ref(virs);
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/vi_resource_event.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/vi_resource_event.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,250 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains event handling for VI resource.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/nic_table.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efhw/eventq.h>
++#include <ci/efrm/private.h>
++#include <ci/efrm/vi_resource_private.h>
++#include <ci/efrm/efrm_nic.h>
++#include "efrm_internal.h"
++
++
++static inline int
++efrm_eventq_bytes(struct vi_resource *virs)
++{
++ return efrm_vi_rm_evq_bytes(virs);
++}
++
++
++static inline efhw_event_t *
++efrm_eventq_base(struct vi_resource *virs)
++{
++ struct eventq_resource_hardware *hw;
++ hw = &(virs->nic_info.evq_pages);
++ return (efhw_event_t *) (efhw_iopages_ptr(&(hw->iobuff)) +
++ hw->iobuff_off);
++}
++
++
++void
++efrm_eventq_request_wakeup(struct vi_resource *virs, unsigned current_ptr)
++{
++ struct efhw_nic *nic = virs->rs.rs_client->nic;
++ int next_i;
++ next_i = ((current_ptr / sizeof(efhw_event_t)) &
++ (virs->evq_capacity - 1));
++
++ efhw_nic_wakeup_request(nic, efrm_eventq_dma_addr(virs), next_i,
++ EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle));
++}
++EXPORT_SYMBOL(efrm_eventq_request_wakeup);
++
++void efrm_eventq_reset(struct vi_resource *virs)
++{
++ struct efhw_nic *nic = virs->rs.rs_client->nic;
++ int instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++
++ EFRM_ASSERT(virs->evq_capacity != 0);
++
++ /* FIXME: Protect against concurrent resets. */
++
++ efhw_nic_event_queue_disable(nic, instance, 0);
++
++ memset(efrm_eventq_base(virs), EFHW_CLEAR_EVENT_VALUE,
++ efrm_eventq_bytes(virs));
++ efhw_nic_event_queue_enable(nic, instance, virs->evq_capacity,
++ efrm_eventq_dma_addr(virs),
++ virs->nic_info.evq_pages.
++ buf_tbl_alloc.base,
++ instance < 64);
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT, __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle));
++}
++EXPORT_SYMBOL(efrm_eventq_reset);
++
++int
++efrm_eventq_register_callback(struct vi_resource *virs,
++ void (*handler) (void *, int,
++ struct efhw_nic *nic),
++ void *arg)
++{
++ struct efrm_nic_per_vi *cb_info;
++ int instance;
++ int bit;
++
++ EFRM_RESOURCE_ASSERT_VALID(&virs->rs, 0);
++ EFRM_ASSERT(virs->evq_capacity != 0);
++ EFRM_ASSERT(handler != NULL);
++
++ /* ?? TODO: Get rid of this test when client is compulsory. */
++ if (virs->rs.rs_client == NULL) {
++ EFRM_ERR("%s: no client", __func__);
++ return -EINVAL;
++ }
++
++ virs->evq_callback_arg = arg;
++ virs->evq_callback_fn = handler;
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++ cb_info = &efrm_nic(virs->rs.rs_client->nic)->vis[instance];
++
++ /* The handler can be set only once. */
++ bit = test_and_set_bit(VI_RESOURCE_EVQ_STATE_CALLBACK_REGISTERED,
++ &cb_info->state);
++ if (bit)
++ return -EBUSY;
++ cb_info->vi = virs;
++
++ return 0;
++}
++EXPORT_SYMBOL(efrm_eventq_register_callback);
++
++void efrm_eventq_kill_callback(struct vi_resource *virs)
++{
++ struct efrm_nic_per_vi *cb_info;
++ int32_t evq_state;
++ int instance;
++ int bit;
++
++ EFRM_RESOURCE_ASSERT_VALID(&virs->rs, 0);
++ EFRM_ASSERT(virs->evq_capacity != 0);
++ EFRM_ASSERT(virs->rs.rs_client != NULL);
++
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++ cb_info = &efrm_nic(virs->rs.rs_client->nic)->vis[instance];
++ cb_info->vi = NULL;
++
++ /* Disable the timer. */
++ efhw_nic_event_queue_disable(virs->rs.rs_client->nic,
++ instance, /*timer_only */ 1);
++
++ /* Disable the callback. */
++ bit = test_and_clear_bit(VI_RESOURCE_EVQ_STATE_CALLBACK_REGISTERED,
++ &cb_info->state);
++ EFRM_ASSERT(bit); /* do not call me twice! */
++
++ /* Spin until the callback is complete. */
++ do {
++ rmb();
++
++ udelay(1);
++ evq_state = cb_info->state;
++ } while ((evq_state & VI_RESOURCE_EVQ_STATE(BUSY)));
++
++ virs->evq_callback_fn = NULL;
++}
++EXPORT_SYMBOL(efrm_eventq_kill_callback);
++
++static void
++efrm_eventq_do_callback(struct efhw_nic *nic, unsigned instance,
++ bool is_timeout)
++{
++ struct efrm_nic *rnic = efrm_nic(nic);
++ void (*handler) (void *, int is_timeout, struct efhw_nic *nic);
++ void *arg;
++ struct efrm_nic_per_vi *cb_info;
++ int32_t evq_state;
++ int32_t new_evq_state;
++ struct vi_resource *virs;
++ int bit;
++
++ EFRM_ASSERT(efrm_vi_manager);
++
++ cb_info = &rnic->vis[instance];
++
++ /* Set the BUSY bit and clear WAKEUP_PENDING. Do this
++ * before waking up the sleeper to avoid races. */
++ while (1) {
++ evq_state = cb_info->state;
++ new_evq_state = evq_state;
++
++ if ((evq_state & VI_RESOURCE_EVQ_STATE(BUSY)) != 0) {
++ EFRM_ERR("%s:%d: evq_state[%d] corrupted!",
++ __func__, __LINE__, instance);
++ return;
++ }
++
++ if (!is_timeout)
++ new_evq_state &= ~VI_RESOURCE_EVQ_STATE(WAKEUP_PENDING);
++
++ if (evq_state & VI_RESOURCE_EVQ_STATE(CALLBACK_REGISTERED)) {
++ new_evq_state |= VI_RESOURCE_EVQ_STATE(BUSY);
++ virs = cb_info->vi;
++ if (cmpxchg(&cb_info->state, evq_state,
++ new_evq_state) == evq_state)
++ break;
++ } else {
++ /* Just update the state if necessary. */
++ if (new_evq_state == evq_state ||
++ cmpxchg(&cb_info->state, evq_state,
++ new_evq_state) == evq_state)
++ return;
++ }
++ }
++
++ if (virs) {
++ handler = virs->evq_callback_fn;
++ arg = virs->evq_callback_arg;
++ EFRM_ASSERT(handler != NULL);
++ handler(arg, is_timeout, nic);
++ }
++
++ /* Clear the BUSY bit. */
++ bit =
++ test_and_clear_bit(VI_RESOURCE_EVQ_STATE_BUSY,
++ &cb_info->state);
++ if (!bit) {
++ EFRM_ERR("%s:%d: evq_state corrupted!",
++ __func__, __LINE__);
++ }
++}
++
++void efrm_handle_wakeup_event(struct efhw_nic *nic, unsigned instance)
++{
++ efrm_eventq_do_callback(nic, instance, false);
++}
++
++void efrm_handle_timeout_event(struct efhw_nic *nic, unsigned instance)
++{
++ efrm_eventq_do_callback(nic, instance, true);
++}
++
++void efrm_handle_sram_event(struct efhw_nic *nic)
++{
++ if (nic->buf_commit_outstanding > 0)
++ nic->buf_commit_outstanding--;
++}
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/vi_resource_flush.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/vi_resource_flush.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,483 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains DMA queue flushing of VI resources.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/nic_table.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efhw/falcon.h>
++#include <ci/efrm/private.h>
++#include <ci/efrm/sysdep.h>
++#include <ci/efrm/buffer_table.h>
++#include <ci/efrm/vi_resource_private.h>
++#include "efrm_internal.h"
++
++
++/* can fail as workitem can already be scheuled -- ignore failure */
++#define EFRM_VI_RM_DELAYED_FREE(manager) \
++ queue_work(manager->workqueue, &manager->work_item)
++
++static const int flush_fifo_hwm = 8 /* TODO should be a HW specific const */ ;
++
++static void
++efrm_vi_resource_rx_flush_done(struct vi_resource *virs, bool *completed)
++{
++ /* We should only get a flush event if there is a flush
++ * outstanding. */
++ EFRM_ASSERT(virs->rx_flush_outstanding);
++
++ virs->rx_flush_outstanding = 0;
++ virs->rx_flushing = 0;
++
++ list_del(&virs->rx_flush_link);
++ efrm_vi_manager->rx_flush_outstanding_count--;
++
++ if (virs->tx_flushing == 0) {
++ list_add_tail(&virs->rx_flush_link,
++ &efrm_vi_manager->close_pending);
++ *completed = 1;
++ }
++}
++
++static void
++efrm_vi_resource_tx_flush_done(struct vi_resource *virs, bool *completed)
++{
++ /* We should only get a flush event if there is a flush
++ * outstanding. */
++ EFRM_ASSERT(virs->tx_flushing);
++
++ virs->tx_flushing = 0;
++
++ list_del(&virs->tx_flush_link);
++
++ if (virs->rx_flushing == 0) {
++ list_add_tail(&virs->rx_flush_link,
++ &efrm_vi_manager->close_pending);
++ *completed = 1;
++ }
++}
++
++static void
++efrm_vi_resource_issue_rx_flush(struct vi_resource *virs, bool *completed)
++{
++ struct efhw_nic *nic = virs->rs.rs_client->nic;
++ int instance;
++ int rc;
++
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++
++ list_add_tail(&virs->rx_flush_link,
++ &efrm_vi_manager->rx_flush_outstanding_list);
++ virs->rx_flush_outstanding = virs->rx_flushing;
++ efrm_vi_manager->rx_flush_outstanding_count++;
++
++ EFRM_TRACE("%s: rx queue %d flush requested for nic %d",
++ __func__, instance, nic->index);
++ rc = efhw_nic_flush_rx_dma_channel(nic, instance);
++ if (rc == -EAGAIN)
++ efrm_vi_resource_rx_flush_done(virs, completed);
++}
++
++static void
++efrm_vi_resource_issue_tx_flush(struct vi_resource *virs, bool *completed)
++{
++ struct efhw_nic *nic = virs->rs.rs_client->nic;
++ int instance;
++ int rc;
++
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++
++ list_add_tail(&virs->tx_flush_link,
++ &efrm_vi_manager->tx_flush_outstanding_list);
++
++ EFRM_TRACE("%s: tx queue %d flush requested for nic %d",
++ __func__, instance, nic->index);
++ rc = efhw_nic_flush_tx_dma_channel(nic, instance);
++ if (rc == -EAGAIN)
++ efrm_vi_resource_tx_flush_done(virs, completed);
++}
++
++static void efrm_vi_resource_process_waiting_flushes(bool *completed)
++{
++ struct vi_resource *virs;
++
++ while (efrm_vi_manager->rx_flush_outstanding_count < flush_fifo_hwm &&
++ !list_empty(&efrm_vi_manager->rx_flush_waiting_list)) {
++ virs =
++ list_entry(list_pop
++ (&efrm_vi_manager->rx_flush_waiting_list),
++ struct vi_resource, rx_flush_link);
++ efrm_vi_resource_issue_rx_flush(virs, completed);
++ }
++}
++
++#if BUG7916_WORKAROUND || BUG5302_WORKAROUND
++static void
++efrm_vi_resource_flush_retry_vi(struct vi_resource *virs,
++ int64_t time_now, bool *completed)
++{
++ struct efhw_nic *nic;
++ int instance;
++
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++
++ virs->flush_count++;
++ virs->flush_time = time_now;
++ nic = virs->rs.rs_client->nic;
++
++#if BUG7916_WORKAROUND
++ if (virs->rx_flush_outstanding) {
++ EFRM_TRACE("%s: Retrying RX flush on instance %d",
++ __func__, instance);
++
++ list_del(&virs->rx_flush_link);
++ efrm_vi_manager->rx_flush_outstanding_count--;
++ efrm_vi_resource_issue_rx_flush(virs, completed);
++ efrm_vi_resource_process_waiting_flushes(completed);
++ }
++#endif
++
++#if BUG5302_WORKAROUND
++ if (virs->tx_flushing) {
++ if (virs->flush_count > 5) {
++ EFRM_TRACE("%s: VI resource stuck flush pending "
++ "(instance=%d, count=%d)",
++ __func__, instance, virs->flush_count);
++ falcon_clobber_tx_dma_ptrs(nic, instance);
++ } else {
++ EFRM_TRACE("%s: Retrying TX flush on instance %d",
++ __func__, instance);
++ }
++
++ list_del(&virs->tx_flush_link);
++ efrm_vi_resource_issue_tx_flush(virs, completed);
++ }
++#endif
++}
++#endif
++
++int efrm_vi_resource_flush_retry(struct vi_resource *virs)
++{
++#if BUG7916_WORKAROUND || BUG5302_WORKAROUND
++ irq_flags_t lock_flags;
++ bool completed = false;
++
++ if (virs->rx_flushing == 0 && virs->tx_flushing == 0)
++ return -EALREADY;
++
++ spin_lock_irqsave(&efrm_vi_manager->rm.rm_lock, lock_flags);
++ efrm_vi_resource_flush_retry_vi(virs, get_jiffies_64(), &completed);
++ spin_unlock_irqrestore(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ if (completed)
++ EFRM_VI_RM_DELAYED_FREE(efrm_vi_manager);
++#endif
++
++ return 0;
++}
++EXPORT_SYMBOL(efrm_vi_resource_flush_retry);
++
++#if BUG7916_WORKAROUND || BUG5302_WORKAROUND
++/* resource manager lock should be taken before this call */
++static void efrm_vi_handle_flush_loss(bool *completed)
++{
++ struct list_head *pos, *temp;
++ struct vi_resource *virs;
++ int64_t time_now, time_pending;
++
++ /* It's possible we miss flushes - the list is sorted in order we
++ * generate flushes, see if any are very old. It's also possible
++ * that we decide an endpoint is flushed even though we've not
++ * received all the flush events. We *should * mark as
++ * completed, reclaim and loop again. ??
++ * THIS NEEDS BACKPORTING FROM THE FALCON branch
++ */
++ time_now = get_jiffies_64();
++
++#if BUG7916_WORKAROUND
++ list_for_each_safe(pos, temp,
++ &efrm_vi_manager->rx_flush_outstanding_list) {
++ virs = container_of(pos, struct vi_resource, rx_flush_link);
++
++ time_pending = time_now - virs->flush_time;
++
++ /* List entries are held in reverse chronological order. Only
++ * process the old ones. */
++ if (time_pending <= 0x100000000LL)
++ break;
++
++ efrm_vi_resource_flush_retry_vi(virs, time_now, completed);
++ }
++#endif
++
++#if BUG5302_WORKAROUND
++ list_for_each_safe(pos, temp,
++ &efrm_vi_manager->tx_flush_outstanding_list) {
++ virs = container_of(pos, struct vi_resource, tx_flush_link);
++
++ time_pending = time_now - virs->flush_time;
++
++ /* List entries are held in reverse chronological order.
++ * Only process the old ones. */
++ if (time_pending <= 0x100000000LL)
++ break;
++
++ efrm_vi_resource_flush_retry_vi(virs, time_now, completed);
++ }
++#endif
++}
++#endif
++
++void
++efrm_vi_register_flush_callback(struct vi_resource *virs,
++ void (*handler)(void *), void *arg)
++{
++ if (handler == NULL) {
++ virs->flush_callback_fn = handler;
++ wmb();
++ virs->flush_callback_arg = arg;
++ } else {
++ virs->flush_callback_arg = arg;
++ wmb();
++ virs->flush_callback_fn = handler;
++ }
++}
++EXPORT_SYMBOL(efrm_vi_register_flush_callback);
++
++int efrm_pt_flush(struct vi_resource *virs)
++{
++ int instance;
++ irq_flags_t lock_flags;
++ bool completed = false;
++
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++
++ EFRM_ASSERT(virs->rx_flushing == 0);
++ EFRM_ASSERT(virs->rx_flush_outstanding == 0);
++ EFRM_ASSERT(virs->tx_flushing == 0);
++
++ EFRM_TRACE("%s: " EFRM_RESOURCE_FMT " EVQ=%d TXQ=%d RXQ=%d",
++ __func__, EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle),
++ virs->evq_capacity,
++ virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX],
++ virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX]);
++
++ spin_lock_irqsave(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX] != 0)
++ virs->rx_flushing = 1;
++
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX] != 0)
++ virs->tx_flushing = 1;
++
++ /* Clean up immediately if there are no flushes. */
++ if (virs->rx_flushing == 0 && virs->tx_flushing == 0) {
++ list_add_tail(&virs->rx_flush_link,
++ &efrm_vi_manager->close_pending);
++ completed = true;
++ }
++
++ /* Issue the RX flush if possible or queue it for later. */
++ if (virs->rx_flushing) {
++#if BUG7916_WORKAROUND || BUG5302_WORKAROUND
++ if (efrm_vi_manager->rx_flush_outstanding_count >=
++ flush_fifo_hwm)
++ efrm_vi_handle_flush_loss(&completed);
++#endif
++ if (efrm_vi_manager->rx_flush_outstanding_count >=
++ flush_fifo_hwm) {
++ list_add_tail(&virs->rx_flush_link,
++ &efrm_vi_manager->rx_flush_waiting_list);
++ } else {
++ efrm_vi_resource_issue_rx_flush(virs, &completed);
++ }
++ }
++
++ /* Issue the TX flush. There's no limit to the number of
++ * outstanding TX flushes. */
++ if (virs->tx_flushing)
++ efrm_vi_resource_issue_tx_flush(virs, &completed);
++
++ virs->flush_time = get_jiffies_64();
++
++ spin_unlock_irqrestore(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ if (completed)
++ EFRM_VI_RM_DELAYED_FREE(efrm_vi_manager);
++
++ return 0;
++}
++EXPORT_SYMBOL(efrm_pt_flush);
++
++static void
++efrm_handle_rx_dmaq_flushed(struct efhw_nic *flush_nic, int instance,
++ bool *completed)
++{
++ struct list_head *pos, *temp;
++ struct vi_resource *virs;
++
++ list_for_each_safe(pos, temp,
++ &efrm_vi_manager->rx_flush_outstanding_list) {
++ virs = container_of(pos, struct vi_resource, rx_flush_link);
++
++ if (instance == EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle)) {
++ efrm_vi_resource_rx_flush_done(virs, completed);
++ efrm_vi_resource_process_waiting_flushes(completed);
++ return;
++ }
++ }
++ EFRM_TRACE("%s: Unhandled rx flush event, nic %d, instance %d",
++ __func__, flush_nic->index, instance);
++}
++
++static void
++efrm_handle_tx_dmaq_flushed(struct efhw_nic *flush_nic, int instance,
++ bool *completed)
++{
++ struct list_head *pos, *temp;
++ struct vi_resource *virs;
++
++ list_for_each_safe(pos, temp,
++ &efrm_vi_manager->tx_flush_outstanding_list) {
++ virs = container_of(pos, struct vi_resource, tx_flush_link);
++
++ if (instance == EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle)) {
++ efrm_vi_resource_tx_flush_done(virs, completed);
++ return;
++ }
++ }
++ EFRM_TRACE("%s: Unhandled tx flush event, nic %d, instance %d",
++ __func__, flush_nic->index, instance);
++}
++
++void
++efrm_handle_dmaq_flushed(struct efhw_nic *flush_nic, unsigned instance,
++ int rx_flush)
++{
++ irq_flags_t lock_flags;
++ bool completed = false;
++
++ EFRM_TRACE("%s: nic_i=%d instance=%d rx_flush=%d", __func__,
++ flush_nic->index, instance, rx_flush);
++
++ spin_lock_irqsave(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ if (rx_flush)
++ efrm_handle_rx_dmaq_flushed(flush_nic, instance, &completed);
++ else
++ efrm_handle_tx_dmaq_flushed(flush_nic, instance, &completed);
++
++#if BUG7916_WORKAROUND || BUG5302_WORKAROUND
++ efrm_vi_handle_flush_loss(&completed);
++#endif
++
++ spin_unlock_irqrestore(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ if (completed)
++ EFRM_VI_RM_DELAYED_FREE(efrm_vi_manager);
++}
++
++static void
++efrm_vi_rm_reinit_dmaqs(struct vi_resource *virs)
++{
++ struct efhw_nic *nic = virs->rs.rs_client->nic;
++
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_TX] != 0)
++ efrm_vi_rm_init_dmaq(virs, EFRM_VI_RM_DMA_QUEUE_TX, nic);
++ if (virs->dmaq_capacity[EFRM_VI_RM_DMA_QUEUE_RX])
++ efrm_vi_rm_init_dmaq(virs, EFRM_VI_RM_DMA_QUEUE_RX, nic);
++}
++
++/* free any PT endpoints whose flush has now complete */
++void efrm_vi_rm_delayed_free(struct work_struct *data)
++{
++ irq_flags_t lock_flags;
++ struct list_head close_pending;
++ struct vi_resource *virs;
++
++ EFRM_RESOURCE_MANAGER_ASSERT_VALID(&efrm_vi_manager->rm);
++
++ spin_lock_irqsave(&efrm_vi_manager->rm.rm_lock, lock_flags);
++ list_replace_init(&efrm_vi_manager->close_pending, &close_pending);
++ spin_unlock_irqrestore(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ EFRM_TRACE("%s: %p", __func__, efrm_vi_manager);
++ while (!list_empty(&close_pending)) {
++ virs =
++ list_entry(list_pop(&close_pending), struct vi_resource,
++ rx_flush_link);
++ EFRM_TRACE("%s: flushed VI instance=%d", __func__,
++ EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle));
++
++ if (virs->flush_callback_fn != NULL) {
++ efrm_vi_rm_reinit_dmaqs(virs);
++ virs->flush_callback_fn(virs->flush_callback_arg);
++ } else
++ efrm_vi_rm_free_flushed_resource(virs);
++ }
++}
++
++void efrm_vi_rm_salvage_flushed_vis(void)
++{
++#if BUG7916_WORKAROUND || BUG5302_WORKAROUND
++ irq_flags_t lock_flags;
++ bool completed;
++
++ spin_lock_irqsave(&efrm_vi_manager->rm.rm_lock, lock_flags);
++ efrm_vi_handle_flush_loss(&completed);
++ spin_unlock_irqrestore(&efrm_vi_manager->rm.rm_lock, lock_flags);
++#endif
++
++ efrm_vi_rm_delayed_free(&efrm_vi_manager->work_item);
++}
++
++void efrm_vi_resource_free(struct vi_resource *virs)
++{
++ efrm_vi_register_flush_callback(virs, NULL, NULL);
++ efrm_pt_flush(virs);
++}
++EXPORT_SYMBOL(efrm_vi_resource_free);
++
++
++void efrm_vi_resource_release(struct vi_resource *virs)
++{
++ if (__efrm_resource_release(&virs->rs))
++ efrm_vi_resource_free(virs);
++}
++EXPORT_SYMBOL(efrm_vi_resource_release);
++
++/*
++ * vi: sw=8:ai:aw
++ */
+Index: head-2008-07-15/drivers/net/sfc/sfc_resource/vi_resource_manager.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-07-15/drivers/net/sfc/sfc_resource/vi_resource_manager.c 2008-07-17 16:18:07.000000000 +0200
+@@ -0,0 +1,231 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains the VI resource manager.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <ci/efrm/nic_table.h>
++#include <ci/driver/efab/hardware.h>
++#include <ci/efhw/falcon.h>
++#include <ci/efrm/private.h>
++#include <ci/efrm/vi_resource_private.h>
++#include "efrm_internal.h"
++
++
++int efrm_pt_pace(struct vi_resource *virs, unsigned int val)
++{
++ struct efhw_nic *nic = virs->rs.rs_client->nic;
++ int instance;
++
++ EFRM_RESOURCE_ASSERT_VALID(&virs->rs, 0);
++ instance = EFRM_RESOURCE_INSTANCE(virs->rs.rs_handle);
++ falcon_nic_pace(nic, instance, val);
++ EFRM_TRACE("%s[%d]=%d DONE", __func__, instance, val);
++ return 0;
++}
++EXPORT_SYMBOL(efrm_pt_pace);
++
++/*** Resource manager creation/destruction *******************************/
++
++static void efrm_vi_rm_dtor(struct efrm_resource_manager *rm);
++
++static int
++efrm_create_or_destroy_vi_resource_manager(
++ struct efrm_resource_manager **rm_in_out,
++ const struct vi_resource_dimensions *dims,
++ bool destroy)
++{
++ struct vi_resource *virs;
++ struct list_head *pos, *temp;
++ struct list_head flush_pending;
++ irq_flags_t lock_flags;
++ int rc;
++ unsigned dmaq_min, dmaq_lim;
++
++ EFRM_ASSERT(rm_in_out);
++
++ if (destroy)
++ goto destroy;
++
++ EFRM_ASSERT(dims);
++ EFRM_NOTICE("vi_resource_manager: evq_int=%u-%u evq_timer=%u-%u",
++ dims->evq_int_min, dims->evq_int_lim,
++ dims->evq_timer_min, dims->evq_timer_lim);
++ EFRM_NOTICE("vi_resource_manager: rxq=%u-%u txq=%u-%u",
++ dims->rxq_min, dims->rxq_lim,
++ dims->txq_min, dims->txq_lim);
++
++ efrm_vi_manager = kmalloc(sizeof(*efrm_vi_manager), GFP_KERNEL);
++ if (efrm_vi_manager == NULL) {
++ rc = -ENOMEM;
++ goto fail_alloc;
++ }
++
++ memset(efrm_vi_manager, 0, sizeof(*efrm_vi_manager));
++
++ efrm_vi_manager->iscsi_dmaq_instance_is_free = true;
++
++ dmaq_min = max(dims->rxq_min, dims->txq_min);
++ dmaq_lim = min(dims->rxq_lim, dims->txq_lim);
++
++ efrm_vi_manager->with_timer_base =
++ max(dmaq_min, dims->evq_timer_min);
++ efrm_vi_manager->with_timer_limit =
++ min(dmaq_lim, dims->evq_timer_lim);
++ rc = efrm_kfifo_id_ctor(&efrm_vi_manager->instances_with_timer,
++ efrm_vi_manager->with_timer_base,
++ efrm_vi_manager->with_timer_limit,
++ &efrm_vi_manager->rm.rm_lock);
++ if (rc < 0)
++ goto fail_with_timer_id_pool;
++
++ efrm_vi_manager->with_interrupt_base =
++ max(dmaq_min, dims->evq_int_min);
++ efrm_vi_manager->with_interrupt_limit =
++ min(dmaq_lim, dims->evq_int_lim);
++ efrm_vi_manager->with_interrupt_limit =
++ max(efrm_vi_manager->with_interrupt_limit,
++ efrm_vi_manager->with_interrupt_base);
++ rc = efrm_kfifo_id_ctor(&efrm_vi_manager->instances_with_interrupt,
++ efrm_vi_manager->with_interrupt_base,
++ efrm_vi_manager->with_interrupt_limit,
++ &efrm_vi_manager->rm.rm_lock);
++ if (rc < 0)
++ goto fail_with_int_id_pool;
++
++ INIT_LIST_HEAD(&efrm_vi_manager->rx_flush_waiting_list);
++ INIT_LIST_HEAD(&efrm_vi_manager->rx_flush_outstanding_list);
++ INIT_LIST_HEAD(&efrm_vi_manager->tx_flush_outstanding_list);
++ efrm_vi_manager->rx_flush_outstanding_count = 0;
++
++ INIT_LIST_HEAD(&efrm_vi_manager->close_pending);
++ efrm_vi_manager->workqueue = create_workqueue("sfc_vi");
++ if (efrm_vi_manager->workqueue == NULL)
++ goto fail_create_workqueue;
++ INIT_WORK(&efrm_vi_manager->work_item, efrm_vi_rm_delayed_free);
++
++ /* NB. This must be the last step to avoid things getting tangled.
++ * efrm_resource_manager_dtor calls the vi_rm_dtor which ends up in
++ * this function. */
++ rc = efrm_resource_manager_ctor(&efrm_vi_manager->rm, efrm_vi_rm_dtor,
++ "VI", EFRM_RESOURCE_VI);
++ if (rc < 0)
++ goto fail_rm_ctor;
++
++ *rm_in_out = &efrm_vi_manager->rm;
++ return 0;
++
++destroy:
++ rc = 0;
++ EFRM_RESOURCE_MANAGER_ASSERT_VALID(*rm_in_out);
++
++ /* Abort outstanding flushes. Note, a VI resource can be on more
++ * than one of these lists. We handle this by starting with the TX
++ * list and then append VIs to this list if they aren't on the TX
++ * list already. A VI is on the TX flush list if tx_flushing
++ * is not empty. */
++ spin_lock_irqsave(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ list_replace_init(&efrm_vi_manager->tx_flush_outstanding_list,
++ &flush_pending);
++
++ list_for_each_safe(pos, temp,
++ &efrm_vi_manager->rx_flush_waiting_list) {
++ virs = container_of(pos, struct vi_resource, rx_flush_link);
++
++ list_del(&virs->rx_flush_link);
++ if (virs->tx_flushing == 0)
++ list_add_tail(&virs->tx_flush_link, &flush_pending);
++ }
++
++ list_for_each_safe(pos, temp,
++ &efrm_vi_manager->rx_flush_outstanding_list) {
++ virs = container_of(pos, struct vi_resource, rx_flush_link);
++
++ list_del(&virs->rx_flush_link);
++ if (virs->tx_flushing == 0)
++ list_add_tail(&virs->tx_flush_link, &flush_pending);
++ }
++
++ spin_unlock_irqrestore(&efrm_vi_manager->rm.rm_lock, lock_flags);
++
++ while (!list_empty(&flush_pending)) {
++ virs =
++ list_entry(list_pop(&flush_pending), struct vi_resource,
++ tx_flush_link);
++ EFRM_TRACE("%s: found PT endpoint " EFRM_RESOURCE_FMT
++ " with flush pending [Tx=0x%x, Rx=0x%x, RxO=0x%x]",
++ __func__,
++ EFRM_RESOURCE_PRI_ARG(virs->rs.rs_handle),
++ virs->tx_flushing,
++ virs->rx_flushing,
++ virs->rx_flush_outstanding);
++ efrm_vi_rm_free_flushed_resource(virs);
++ }
++
++fail_rm_ctor:
++
++ /* Complete outstanding closes. */
++ destroy_workqueue(efrm_vi_manager->workqueue);
++fail_create_workqueue:
++ EFRM_ASSERT(list_empty(&efrm_vi_manager->close_pending));
++ kfifo_vfree(efrm_vi_manager->instances_with_interrupt);
++fail_with_int_id_pool:
++
++ kfifo_vfree(efrm_vi_manager->instances_with_timer);
++fail_with_timer_id_pool:
++
++ if (destroy)
++ return 0;
++
++ EFRM_DO_DEBUG(memset(efrm_vi_manager, 0, sizeof(*efrm_vi_manager)));
++ kfree(efrm_vi_manager);
++fail_alloc:
++
++ *rm_in_out = NULL;
++ EFRM_ERR("%s: failed rc=%d", __func__, rc);
++ return rc;
++}
++
++int
++efrm_create_vi_resource_manager(struct efrm_resource_manager **rm_out,
++ const struct vi_resource_dimensions *dims)
++{
++ return efrm_create_or_destroy_vi_resource_manager(rm_out, dims, false);
++}
++
++static void efrm_vi_rm_dtor(struct efrm_resource_manager *rm)
++{
++ efrm_create_or_destroy_vi_resource_manager(&rm, NULL, true);
++}
--- /dev/null
+From: jbeulich@novell.com
+Subject: conditionalize driverlink additions to Solarflare driver
+Patch-mainline: obsolete
+References: FATE#303479
+
+At once converted the EFX_TRACE() invocations after vetoed RX/TX
+callbacks to ...LOG() ones, which is consistent with Solarflare's
+current code according to David Riddoch (2008-09-12).
+
+Index: head-2008-09-01/drivers/net/sfc/Kconfig
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/Kconfig 2008-07-17 16:18:07.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/Kconfig 2008-09-12 14:01:48.000000000 +0200
+@@ -13,8 +13,12 @@ config SFC
+ To compile this driver as a module, choose M here. The module
+ will be called sfc.
+
++config SFC_DRIVERLINK
++ bool
++
+ config SFC_RESOURCE
+ depends on SFC && X86
++ select SFC_DRIVERLINK
+ tristate "Solarflare Solarstorm SFC4000 resource driver"
+ help
+ This module provides the SFC resource manager driver.
+Index: head-2008-09-01/drivers/net/sfc/Makefile
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/Makefile 2008-07-17 16:18:07.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/Makefile 2008-09-12 12:22:05.000000000 +0200
+@@ -1,7 +1,7 @@
+ sfc-y += efx.o falcon.o tx.o rx.o falcon_xmac.o \
+ selftest.o ethtool.o xfp_phy.o \
+- mdio_10g.o tenxpress.o boards.o sfe4001.o \
+- driverlink.o
++ mdio_10g.o tenxpress.o boards.o sfe4001.o
++sfc-$(CONFIG_SFC_DRIVERLINK) += driverlink.o
+ obj-$(CONFIG_SFC) += sfc.o
+
+ obj-$(CONFIG_SFC_RESOURCE) += sfc_resource/
+Index: head-2008-09-01/drivers/net/sfc/driverlink.c
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/driverlink.c 2008-08-18 10:16:46.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/driverlink.c 2008-09-12 13:57:29.000000000 +0200
+@@ -14,7 +14,6 @@
+ #include <linux/rtnetlink.h>
+ #include "net_driver.h"
+ #include "efx.h"
+-#include "driverlink_api.h"
+ #include "driverlink.h"
+
+ /* Protects @efx_driverlink_lock and @efx_driver_list */
+Index: head-2008-09-01/drivers/net/sfc/driverlink.h
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/driverlink.h 2008-08-18 10:16:46.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/driverlink.h 2008-09-12 16:14:04.000000000 +0200
+@@ -15,6 +15,10 @@
+ struct efx_dl_device;
+ struct efx_nic;
+
++#ifdef CONFIG_SFC_DRIVERLINK
++
++#include "driverlink_api.h"
++
+ /* Efx callback devices
+ *
+ * A list of the devices that own each callback. The partner to
+@@ -40,4 +44,23 @@ extern void efx_dl_unregister_nic(struct
+ extern void efx_dl_reset_suspend(struct efx_nic *efx);
+ extern void efx_dl_reset_resume(struct efx_nic *efx, int ok);
+
++#define EFX_DL_LOG EFX_LOG
++
++#else /* CONFIG_SFC_DRIVERLINK */
++
++enum efx_veto { EFX_ALLOW_PACKET = 0 };
++
++static inline int efx_nop_callback(struct efx_nic *efx) { return 0; }
++#define EFX_DL_CALLBACK(port, name, ...) efx_nop_callback(port)
++
++static inline int efx_dl_register_nic(struct efx_nic *efx) { return 0; }
++static inline void efx_dl_unregister_nic(struct efx_nic *efx) {}
++
++static inline void efx_dl_reset_suspend(struct efx_nic *efx) {}
++static inline void efx_dl_reset_resume(struct efx_nic *efx, int ok) {}
++
++#define EFX_DL_LOG(efx, fmt, args...) ((void)(efx))
++
++#endif /* CONFIG_SFC_DRIVERLINK */
++
+ #endif /* EFX_DRIVERLINK_H */
+Index: head-2008-09-01/drivers/net/sfc/efx.c
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/efx.c 2008-08-18 10:16:46.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/efx.c 2008-09-12 12:42:32.000000000 +0200
+@@ -1596,6 +1596,7 @@ static void efx_unregister_netdev(struct
+ * Device reset and suspend
+ *
+ **************************************************************************/
++#ifdef CONFIG_SFC_DRIVERLINK
+ /* Serialise access to the driverlink callbacks, by quiescing event processing
+ * (without flushing the descriptor queues), and acquiring the rtnl_lock */
+ void efx_suspend(struct efx_nic *efx)
+@@ -1613,6 +1614,7 @@ void efx_resume(struct efx_nic *efx)
+ efx_start_all(efx);
+ rtnl_unlock();
+ }
++#endif
+
+ /* The final hardware and software finalisation before reset. */
+ static int efx_reset_down(struct efx_nic *efx, struct ethtool_cmd *ecmd)
+@@ -1899,9 +1901,11 @@ static int efx_init_struct(struct efx_ni
+ mutex_init(&efx->mac_lock);
+ efx->phy_op = &efx_dummy_phy_operations;
+ efx->mii.dev = net_dev;
++#ifdef CONFIG_SFC_DRIVERLINK
+ INIT_LIST_HEAD(&efx->dl_node);
+ INIT_LIST_HEAD(&efx->dl_device_list);
+ efx->dl_cb = efx_default_callbacks;
++#endif
+ INIT_WORK(&efx->reconfigure_work, efx_reconfigure_work);
+ atomic_set(&efx->netif_stop_count, 1);
+
+Index: head-2008-09-01/drivers/net/sfc/falcon.c
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/falcon.c 2008-08-18 10:16:46.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/falcon.c 2008-09-12 13:51:32.000000000 +0200
+@@ -36,12 +36,17 @@
+
+ /**
+ * struct falcon_nic_data - Falcon NIC state
++ * @next_buffer_table: First available buffer table id
+ * @resources: Resource information for driverlink client
+ * @pci_dev2: The secondary PCI device if present
+ * @i2c_data: Operations and state for I2C bit-bashing algorithm
+ */
+ struct falcon_nic_data {
++#ifndef CONFIG_SFC_DRIVERLINK
++ unsigned next_buffer_table;
++#else
+ struct efx_dl_falcon_resources resources;
++#endif
+ struct pci_dev *pci_dev2;
+ struct i2c_algo_bit_data i2c_data;
+ };
+@@ -322,8 +327,13 @@ static int falcon_alloc_special_buffer(s
+ memset(buffer->addr, 0xff, len);
+
+ /* Select new buffer ID */
++#ifndef CONFIG_SFC_DRIVERLINK
++ buffer->index = nic_data->next_buffer_table;
++ nic_data->next_buffer_table += buffer->entries;
++#else
+ buffer->index = nic_data->resources.buffer_table_min;
+ nic_data->resources.buffer_table_min += buffer->entries;
++#endif
+
+ EFX_LOG(efx, "allocating special buffers %d-%d at %llx+%x "
+ "(virt %p phys %lx)\n", buffer->index,
+@@ -2382,6 +2392,7 @@ static int falcon_probe_nvconfig(struct
+ * should live. */
+ static int falcon_dimension_resources(struct efx_nic *efx)
+ {
++#ifdef CONFIG_SFC_DRIVERLINK
+ unsigned internal_dcs_entries;
+ struct falcon_nic_data *nic_data = efx->nic_data;
+ struct efx_dl_falcon_resources *res = &nic_data->resources;
+@@ -2426,6 +2437,7 @@ static int falcon_dimension_resources(st
+
+ if (EFX_INT_MODE_USE_MSI(efx))
+ res->flags |= EFX_DL_FALCON_USE_MSI;
++#endif
+
+ return 0;
+ }
+@@ -2551,7 +2563,9 @@ int falcon_probe_nic(struct efx_nic *efx
+ return 0;
+
+ fail6:
++#ifdef CONFIG_SFC_DRIVERLINK
+ efx->dl_info = NULL;
++#endif
+ fail5:
+ falcon_free_buffer(efx, &efx->irq_status);
+ fail4:
+@@ -2742,7 +2756,9 @@ void falcon_remove_nic(struct efx_nic *e
+ /* Tear down the private nic state */
+ kfree(efx->nic_data);
+ efx->nic_data = NULL;
++#ifdef CONFIG_SFC_DRIVERLINK
+ efx->dl_info = NULL;
++#endif
+ }
+
+ void falcon_update_nic_stats(struct efx_nic *efx)
+Index: head-2008-09-01/drivers/net/sfc/net_driver.h
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/net_driver.h 2008-08-18 10:16:46.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/net_driver.h 2008-09-12 13:57:19.000000000 +0200
+@@ -30,7 +30,6 @@
+
+ #include "enum.h"
+ #include "bitfield.h"
+-#include "driverlink_api.h"
+ #include "driverlink.h"
+
+ #define EFX_MAX_LRO_DESCRIPTORS 8
+@@ -762,11 +761,13 @@ struct efx_nic {
+ void *loopback_selftest;
+
+ const char *silicon_rev;
++#ifdef CONFIG_SFC_DRIVERLINK
+ struct efx_dl_device_info *dl_info;
+ struct list_head dl_node;
+ struct list_head dl_device_list;
+ struct efx_dl_callbacks dl_cb;
+ struct efx_dl_cb_devices dl_cb_dev;
++#endif
+ };
+
+ static inline int efx_dev_registered(struct efx_nic *efx)
+Index: head-2008-09-01/drivers/net/sfc/rx.c
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/rx.c 2008-08-18 10:16:46.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/rx.c 2008-09-12 16:13:49.000000000 +0200
+@@ -559,8 +559,8 @@ static inline void efx_rx_packet_lro(str
+ * an obvious interface to this, so veto packets before LRO */
+ veto = EFX_DL_CALLBACK(efx, rx_packet, rx_buf->data, rx_buf->len);
+ if (unlikely(veto)) {
+- EFX_TRACE(efx, "LRO RX vetoed by driverlink %s driver\n",
+- efx->dl_cb_dev.rx_packet->driver->name);
++ EFX_DL_LOG(efx, "LRO RX vetoed by driverlink %s driver\n",
++ efx->dl_cb_dev.rx_packet->driver->name);
+ /* Free the buffer now */
+ efx_free_rx_buffer(efx, rx_buf);
+ return;
+@@ -741,8 +741,8 @@ void __efx_rx_packet(struct efx_channel
+ /* Allow callback to veto the packet */
+ veto = EFX_DL_CALLBACK(efx, rx_packet, rx_buf->data, rx_buf->len);
+ if (unlikely(veto)) {
+- EFX_LOG(efx, "RX vetoed by driverlink %s driver\n",
+- efx->dl_cb_dev.rx_packet->driver->name);
++ EFX_DL_LOG(efx, "RX vetoed by driverlink %s driver\n",
++ efx->dl_cb_dev.rx_packet->driver->name);
+ /* Free the buffer now */
+ efx_free_rx_buffer(efx, rx_buf);
+ goto done;
+Index: head-2008-09-01/drivers/net/sfc/tx.c
+===================================================================
+--- head-2008-09-01.orig/drivers/net/sfc/tx.c 2008-08-18 10:16:46.000000000 +0200
++++ head-2008-09-01/drivers/net/sfc/tx.c 2008-09-12 16:13:34.000000000 +0200
+@@ -374,9 +374,9 @@ int efx_hard_start_xmit(struct sk_buff *
+ /* See if driverlink wants to veto the packet. */
+ veto = EFX_DL_CALLBACK(efx, tx_packet, skb);
+ if (unlikely(veto)) {
+- EFX_TRACE(efx, "TX queue %d packet vetoed by "
+- "driverlink %s driver\n", tx_queue->queue,
+- efx->dl_cb_dev.tx_packet->driver->name);
++ EFX_DL_LOG(efx, "TX queue %d packet vetoed by "
++ "driverlink %s driver\n", tx_queue->queue,
++ efx->dl_cb_dev.tx_packet->driver->name);
+ /* Free the skb; nothing else will do it */
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
--- /dev/null
+Subject: xen3 xen-arch
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+List of files having Xen derivates (perhaps created during the merging
+of newer kernel versions), for xen-port-patches.py to pick up (i.e. this
+must be retained here until the XenSource tree has these in the right
+places):
++++ linux/arch/x86/kernel/acpi/sleep-xen.c
++++ linux/arch/x86/kernel/cpu/common_64-xen.c
++++ linux/arch/x86/kernel/e820-xen.c
++++ linux/arch/x86/kernel/head-xen.c
++++ linux/arch/x86/kernel/head32-xen.c
++++ linux/arch/x86/kernel/ioport-xen.c
++++ linux/arch/x86/kernel/ipi-xen.c
++++ linux/arch/x86/kernel/ldt-xen.c
++++ linux/arch/x86/kernel/mpparse-xen.c
++++ linux/arch/x86/kernel/pci-nommu-xen.c
++++ linux/arch/x86/kernel/process-xen.c
++++ linux/arch/x86/kernel/setup-xen.c
++++ linux/arch/x86/kernel/setup_percpu-xen.c
++++ linux/arch/x86/kernel/smp-xen.c
++++ linux/arch/x86/mm/fault-xen.c
++++ linux/arch/x86/mm/ioremap-xen.c
++++ linux/arch/x86/mm/pageattr-xen.c
++++ linux/arch/x86/mm/pat-xen.c
++++ linux/arch/x86/mm/pgtable-xen.c
++++ linux/arch/x86/vdso/vdso32-setup-xen.c
++++ linux/drivers/char/mem-xen.c
++++ linux/include/asm-x86/mach-xen/asm/desc.h
++++ linux/include/asm-x86/mach-xen/asm/dma-mapping.h
++++ linux/include/asm-x86/mach-xen/asm/fixmap.h
++++ linux/include/asm-x86/mach-xen/asm/io.h
++++ linux/include/asm-x86/mach-xen/asm/irq_vectors.h
++++ linux/include/asm-x86/mach-xen/asm/irqflags.h
++++ linux/include/asm-x86/mach-xen/asm/mmu_context.h
++++ linux/include/asm-x86/mach-xen/asm/page.h
++++ linux/include/asm-x86/mach-xen/asm/pci.h
++++ linux/include/asm-x86/mach-xen/asm/pgalloc.h
++++ linux/include/asm-x86/mach-xen/asm/pgtable.h
++++ linux/include/asm-x86/mach-xen/asm/processor.h
++++ linux/include/asm-x86/mach-xen/asm/segment.h
++++ linux/include/asm-x86/mach-xen/asm/smp.h
++++ linux/include/asm-x86/mach-xen/asm/spinlock.h
++++ linux/include/asm-x86/mach-xen/asm/swiotlb.h
++++ linux/include/asm-x86/mach-xen/asm/system.h
++++ linux/include/asm-x86/mach-xen/asm/tlbflush.h
++++ linux/include/asm-x86/mach-xen/asm/xor.h
+
+List of files folded into their native counterparts (and hence removed
+from this patch for xen-port-patches.py to not needlessly pick them up;
+for reference, prefixed with the version the removal occured):
+2.6.18/include/asm-x86/mach-xen/asm/pgtable-2level.h
+2.6.18/include/asm-x86/mach-xen/asm/pgtable-2level-defs.h
+2.6.19/include/asm-x86/mach-xen/asm/ptrace.h
+2.6.23/arch/x86/kernel/vsyscall-note_32-xen.S
+2.6.23/include/asm-x86/mach-xen/asm/ptrace_64.h
+2.6.24/arch/x86/kernel/early_printk_32-xen.c
+2.6.24/include/asm-x86/mach-xen/asm/arch_hooks_64.h
+2.6.24/include/asm-x86/mach-xen/asm/bootsetup_64.h
+2.6.24/include/asm-x86/mach-xen/asm/mmu_32.h
+2.6.24/include/asm-x86/mach-xen/asm/mmu_64.h
+2.6.24/include/asm-x86/mach-xen/asm/nmi_64.h
+2.6.24/include/asm-x86/mach-xen/asm/setup.h
+2.6.24/include/asm-x86/mach-xen/asm/time_64.h (added in 2.6.20)
+2.6.25/arch/x86/ia32/syscall32-xen.c
+2.6.25/arch/x86/ia32/syscall32_syscall-xen.S
+2.6.25/arch/x86/ia32/vsyscall-int80.S
+2.6.25/arch/x86/kernel/acpi/boot-xen.c
+2.6.25/include/asm-x86/mach-xen/asm/msr.h
+2.6.25/include/asm-x86/mach-xen/asm/page_32.h
+2.6.25/include/asm-x86/mach-xen/asm/spinlock_32.h
+2.6.25/include/asm-x86/mach-xen/asm/timer.h (added in 2.6.24)
+2.6.25/include/asm-x86/mach-xen/asm/timer_64.h
+2.6.26/arch/x86/kernel/pci-dma_32-xen.c
+2.6.26/arch/x86/kernel/pci-swiotlb_64-xen.c
+2.6.26/include/asm-x86/mach-xen/asm/dma-mapping_32.h
+2.6.26/include/asm-x86/mach-xen/asm/dma-mapping_64.h
+2.6.26/include/asm-x86/mach-xen/asm/nmi.h (added in 2.6.24)
+2.6.26/include/asm-x86/mach-xen/asm/scatterlist.h (added in 2.6.24)
+2.6.26/include/asm-x86/mach-xen/asm/scatterlist_32.h
+2.6.26/include/xen/xencomm.h
+2.6.27/arch/x86/kernel/e820_32-xen.c
+2.6.27/include/asm-x86/mach-xen/asm/e820.h (added in 2.6.24)
+2.6.27/include/asm-x86/mach-xen/asm/e820_64.h
+2.6.27/include/asm-x86/mach-xen/asm/hw_irq.h (added in 2.6.24)
+2.6.27/include/asm-x86/mach-xen/asm/hw_irq_32.h
+2.6.27/include/asm-x86/mach-xen/asm/hw_irq_64.h
+2.6.27/include/asm-x86/mach-xen/asm/irq.h (added in 2.6.24)
+2.6.27/include/asm-x86/mach-xen/asm/irq_64.h
+
+Index: head-2008-11-25/arch/x86/kernel/acpi/processor_extcntl_xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/acpi/processor_extcntl_xen.c 2008-10-01 15:43:24.000000000 +0200
+@@ -0,0 +1,209 @@
++/*
++ * processor_extcntl_xen.c - interface to notify Xen
++ *
++ * Copyright (C) 2008, Intel corporation
++ *
++ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or (at
++ * your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/types.h>
++#include <linux/acpi.h>
++#include <linux/pm.h>
++#include <linux/cpu.h>
++
++#include <linux/cpufreq.h>
++#include <acpi/processor.h>
++#include <asm/hypercall.h>
++
++static int xen_cx_notifier(struct acpi_processor *pr, int action)
++{
++ int ret, count = 0, i;
++ xen_platform_op_t op = {
++ .cmd = XENPF_set_processor_pminfo,
++ .interface_version = XENPF_INTERFACE_VERSION,
++ .u.set_pminfo.id = pr->acpi_id,
++ .u.set_pminfo.type = XEN_PM_CX,
++ };
++ struct xen_processor_cx *data, *buf;
++ struct acpi_processor_cx *cx;
++
++ if (action == PROCESSOR_PM_CHANGE)
++ return -EINVAL;
++
++ /* Convert to Xen defined structure and hypercall */
++ buf = kzalloc(pr->power.count * sizeof(struct xen_processor_cx),
++ GFP_KERNEL);
++ if (!buf)
++ return -ENOMEM;
++
++ data = buf;
++ for (i = 1; i <= pr->power.count; i++) {
++ cx = &pr->power.states[i];
++ /* Skip invalid cstate entry */
++ if (!cx->valid)
++ continue;
++
++ data->type = cx->type;
++ data->latency = cx->latency;
++ data->power = cx->power;
++ data->reg.space_id = cx->reg.space_id;
++ data->reg.bit_width = cx->reg.bit_width;
++ data->reg.bit_offset = cx->reg.bit_offset;
++ data->reg.access_size = cx->reg.reserved;
++ data->reg.address = cx->reg.address;
++
++ /* Get dependency relationships */
++ if (cx->csd_count) {
++ printk("Wow! _CSD is found. Not support for now!\n");
++ kfree(buf);
++ return -EINVAL;
++ } else {
++ data->dpcnt = 0;
++ set_xen_guest_handle(data->dp, NULL);
++ }
++
++ data++;
++ count++;
++ }
++
++ if (!count) {
++ printk("No available Cx info for cpu %d\n", pr->acpi_id);
++ kfree(buf);
++ return -EINVAL;
++ }
++
++ op.u.set_pminfo.power.count = count;
++ op.u.set_pminfo.power.flags.bm_control = pr->flags.bm_control;
++ op.u.set_pminfo.power.flags.bm_check = pr->flags.bm_check;
++ op.u.set_pminfo.power.flags.has_cst = pr->flags.has_cst;
++ op.u.set_pminfo.power.flags.power_setup_done = pr->flags.power_setup_done;
++
++ set_xen_guest_handle(op.u.set_pminfo.power.states, buf);
++ ret = HYPERVISOR_platform_op(&op);
++ kfree(buf);
++ return ret;
++}
++
++static int xen_px_notifier(struct acpi_processor *pr, int action)
++{
++ int ret = -EINVAL;
++ xen_platform_op_t op = {
++ .cmd = XENPF_set_processor_pminfo,
++ .interface_version = XENPF_INTERFACE_VERSION,
++ .u.set_pminfo.id = pr->acpi_id,
++ .u.set_pminfo.type = XEN_PM_PX,
++ };
++ struct xen_processor_performance *perf;
++ struct xen_processor_px *states = NULL;
++ struct acpi_processor_performance *px;
++ struct acpi_psd_package *pdomain;
++
++ if (!pr)
++ return -EINVAL;
++
++ perf = &op.u.set_pminfo.perf;
++ px = pr->performance;
++
++ switch(action) {
++ case PROCESSOR_PM_CHANGE:
++ /* ppc dynamic handle */
++ perf->flags = XEN_PX_PPC;
++ perf->platform_limit = pr->performance_platform_limit;
++
++ ret = HYPERVISOR_platform_op(&op);
++ break;
++
++ case PROCESSOR_PM_INIT:
++ /* px normal init */
++ perf->flags = XEN_PX_PPC |
++ XEN_PX_PCT |
++ XEN_PX_PSS |
++ XEN_PX_PSD;
++
++ /* ppc */
++ perf->platform_limit = pr->performance_platform_limit;
++
++ /* pct */
++ xen_convert_pct_reg(&perf->control_register, &px->control_register);
++ xen_convert_pct_reg(&perf->status_register, &px->status_register);
++
++ /* pss */
++ perf->state_count = px->state_count;
++ states = kzalloc(px->state_count*sizeof(xen_processor_px_t),GFP_KERNEL);
++ if (!states)
++ return -ENOMEM;
++ xen_convert_pss_states(states, px->states, px->state_count);
++ set_xen_guest_handle(perf->states, states);
++
++ /* psd */
++ pdomain = &px->domain_info;
++ xen_convert_psd_pack(&perf->domain_info, pdomain);
++ if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL)
++ perf->shared_type = CPUFREQ_SHARED_TYPE_ALL;
++ else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY)
++ perf->shared_type = CPUFREQ_SHARED_TYPE_ANY;
++ else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL)
++ perf->shared_type = CPUFREQ_SHARED_TYPE_HW;
++ else {
++ ret = -ENODEV;
++ kfree(states);
++ break;
++ }
++
++ ret = HYPERVISOR_platform_op(&op);
++ kfree(states);
++ break;
++
++ default:
++ break;
++ }
++
++ return ret;
++}
++
++static int xen_tx_notifier(struct acpi_processor *pr, int action)
++{
++ return -EINVAL;
++}
++static int xen_hotplug_notifier(struct acpi_processor *pr, int event)
++{
++ return -EINVAL;
++}
++
++static struct processor_extcntl_ops xen_extcntl_ops = {
++ .hotplug = xen_hotplug_notifier,
++};
++
++void arch_acpi_processor_init_extcntl(const struct processor_extcntl_ops **ops)
++{
++ unsigned int pmbits = (xen_start_info->flags & SIF_PM_MASK) >> 8;
++
++ if (!pmbits)
++ return;
++ if (pmbits & XEN_PROCESSOR_PM_CX)
++ xen_extcntl_ops.pm_ops[PM_TYPE_IDLE] = xen_cx_notifier;
++ if (pmbits & XEN_PROCESSOR_PM_PX)
++ xen_extcntl_ops.pm_ops[PM_TYPE_PERF] = xen_px_notifier;
++ if (pmbits & XEN_PROCESSOR_PM_TX)
++ xen_extcntl_ops.pm_ops[PM_TYPE_THR] = xen_tx_notifier;
++
++ *ops = &xen_extcntl_ops;
++}
++EXPORT_SYMBOL(arch_acpi_processor_init_extcntl);
+Index: head-2008-11-25/arch/x86/kernel/acpi/sleep_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/acpi/sleep_32-xen.c 2008-04-15 09:29:41.000000000 +0200
+@@ -0,0 +1,113 @@
++/*
++ * sleep.c - x86-specific ACPI sleep support.
++ *
++ * Copyright (C) 2001-2003 Patrick Mochel
++ * Copyright (C) 2001-2003 Pavel Machek <pavel@suse.cz>
++ */
++
++#include <linux/acpi.h>
++#include <linux/bootmem.h>
++#include <linux/dmi.h>
++#include <linux/cpumask.h>
++
++#include <asm/smp.h>
++
++#ifndef CONFIG_ACPI_PV_SLEEP
++/* address in low memory of the wakeup routine. */
++unsigned long acpi_wakeup_address = 0;
++unsigned long acpi_video_flags;
++extern char wakeup_start, wakeup_end;
++
++extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
++#endif
++
++/**
++ * acpi_save_state_mem - save kernel state
++ *
++ * Create an identity mapped page table and copy the wakeup routine to
++ * low memory.
++ */
++int acpi_save_state_mem(void)
++{
++#ifndef CONFIG_ACPI_PV_SLEEP
++ if (!acpi_wakeup_address)
++ return 1;
++ memcpy((void *)acpi_wakeup_address, &wakeup_start,
++ &wakeup_end - &wakeup_start);
++ acpi_copy_wakeup_routine(acpi_wakeup_address);
++#endif
++ return 0;
++}
++
++/*
++ * acpi_restore_state - undo effects of acpi_save_state_mem
++ */
++void acpi_restore_state_mem(void)
++{
++}
++
++/**
++ * acpi_reserve_bootmem - do _very_ early ACPI initialisation
++ *
++ * We allocate a page from the first 1MB of memory for the wakeup
++ * routine for when we come back from a sleep state. The
++ * runtime allocator allows specification of <16MB pages, but not
++ * <1MB pages.
++ */
++void __init acpi_reserve_bootmem(void)
++{
++#ifndef CONFIG_ACPI_PV_SLEEP
++ if ((&wakeup_end - &wakeup_start) > PAGE_SIZE) {
++ printk(KERN_ERR
++ "ACPI: Wakeup code way too big, S3 disabled.\n");
++ return;
++ }
++
++ acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE);
++ if (!acpi_wakeup_address)
++ printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
++#endif
++}
++
++#ifndef CONFIG_ACPI_PV_SLEEP
++static int __init acpi_sleep_setup(char *str)
++{
++ while ((str != NULL) && (*str != '\0')) {
++ if (strncmp(str, "s3_bios", 7) == 0)
++ acpi_video_flags = 1;
++ if (strncmp(str, "s3_mode", 7) == 0)
++ acpi_video_flags |= 2;
++ str = strchr(str, ',');
++ if (str != NULL)
++ str += strspn(str, ", \t");
++ }
++ return 1;
++}
++
++__setup("acpi_sleep=", acpi_sleep_setup);
++
++static __init int reset_videomode_after_s3(struct dmi_system_id *d)
++{
++ acpi_video_flags |= 2;
++ return 0;
++}
++
++static __initdata struct dmi_system_id acpisleep_dmi_table[] = {
++ { /* Reset video mode after returning from ACPI S3 sleep */
++ .callback = reset_videomode_after_s3,
++ .ident = "Toshiba Satellite 4030cdt",
++ .matches = {
++ DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
++ },
++ },
++ {}
++};
++
++static int __init acpisleep_dmi_init(void)
++{
++ dmi_check_system(acpisleep_dmi_table);
++ return 0;
++}
++
++core_initcall(acpisleep_dmi_init);
++#endif /* CONFIG_ACPI_PV_SLEEP */
+Index: head-2008-11-25/arch/x86/kernel/apic_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/apic_32-xen.c 2007-06-12 13:12:48.000000000 +0200
+@@ -0,0 +1,155 @@
++/*
++ * Local APIC handling, local APIC timers
++ *
++ * (c) 1999, 2000 Ingo Molnar <mingo@redhat.com>
++ *
++ * Fixes
++ * Maciej W. Rozycki : Bits for genuine 82489DX APICs;
++ * thanks to Eric Gilmore
++ * and Rolf G. Tews
++ * for testing these extensively.
++ * Maciej W. Rozycki : Various updates and fixes.
++ * Mikael Pettersson : Power Management for UP-APIC.
++ * Pavel Machek and
++ * Mikael Pettersson : PM converted to driver model.
++ */
++
++#include <linux/init.h>
++
++#include <linux/mm.h>
++#include <linux/delay.h>
++#include <linux/bootmem.h>
++#include <linux/smp_lock.h>
++#include <linux/interrupt.h>
++#include <linux/mc146818rtc.h>
++#include <linux/kernel_stat.h>
++#include <linux/sysdev.h>
++#include <linux/cpu.h>
++#include <linux/module.h>
++
++#include <asm/atomic.h>
++#include <asm/smp.h>
++#include <asm/mtrr.h>
++#include <asm/mpspec.h>
++#include <asm/desc.h>
++#include <asm/arch_hooks.h>
++#include <asm/hpet.h>
++#include <asm/i8253.h>
++#include <asm/nmi.h>
++
++#include <mach_apic.h>
++#include <mach_apicdef.h>
++#include <mach_ipi.h>
++
++#include "io_ports.h"
++
++#ifndef CONFIG_XEN
++/*
++ * cpu_mask that denotes the CPUs that needs timer interrupt coming in as
++ * IPIs in place of local APIC timers
++ */
++static cpumask_t timer_bcast_ipi;
++#endif
++
++/*
++ * Knob to control our willingness to enable the local APIC.
++ */
++int enable_local_apic __initdata = 0; /* -1=force-disable, +1=force-enable */
++
++/*
++ * Debug level
++ */
++int apic_verbosity;
++
++#ifndef CONFIG_XEN
++static int modern_apic(void)
++{
++ unsigned int lvr, version;
++ /* AMD systems use old APIC versions, so check the CPU */
++ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
++ boot_cpu_data.x86 >= 0xf)
++ return 1;
++ lvr = apic_read(APIC_LVR);
++ version = GET_APIC_VERSION(lvr);
++ return version >= 0x14;
++}
++#endif /* !CONFIG_XEN */
++
++/*
++ * 'what should we do if we get a hw irq event on an illegal vector'.
++ * each architecture has to answer this themselves.
++ */
++void ack_bad_irq(unsigned int irq)
++{
++ printk("unexpected IRQ trap at vector %02x\n", irq);
++ /*
++ * Currently unexpected vectors happen only on SMP and APIC.
++ * We _must_ ack these because every local APIC has only N
++ * irq slots per priority level, and a 'hanging, unacked' IRQ
++ * holds up an irq slot - in excessive cases (when multiple
++ * unexpected vectors occur) that might lock up the APIC
++ * completely.
++ * But only ack when the APIC is enabled -AK
++ */
++ if (cpu_has_apic)
++ ack_APIC_irq();
++}
++
++int get_physical_broadcast(void)
++{
++ return 0xff;
++}
++
++#ifndef CONFIG_XEN
++#ifndef CONFIG_SMP
++static void up_apic_timer_interrupt_call(struct pt_regs *regs)
++{
++ int cpu = smp_processor_id();
++
++ /*
++ * the NMI deadlock-detector uses this.
++ */
++ per_cpu(irq_stat, cpu).apic_timer_irqs++;
++
++ smp_local_timer_interrupt(regs);
++}
++#endif
++
++void smp_send_timer_broadcast_ipi(struct pt_regs *regs)
++{
++ cpumask_t mask;
++
++ cpus_and(mask, cpu_online_map, timer_bcast_ipi);
++ if (!cpus_empty(mask)) {
++#ifdef CONFIG_SMP
++ send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
++#else
++ /*
++ * We can directly call the apic timer interrupt handler
++ * in UP case. Minus all irq related functions
++ */
++ up_apic_timer_interrupt_call(regs);
++#endif
++ }
++}
++#endif
++
++int setup_profiling_timer(unsigned int multiplier)
++{
++ return -EINVAL;
++}
++
++/*
++ * This initializes the IO-APIC and APIC hardware if this is
++ * a UP kernel.
++ */
++int __init APIC_init_uniprocessor (void)
++{
++#ifdef CONFIG_X86_IO_APIC
++ if (smp_found_config)
++ if (!skip_ioapic_setup && nr_ioapics)
++ setup_IO_APIC();
++#endif
++
++ return 0;
++}
+Index: head-2008-11-25/arch/x86/kernel/cpu/common-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/cpu/common-xen.c 2007-12-10 08:47:31.000000000 +0100
+@@ -0,0 +1,743 @@
++#include <linux/init.h>
++#include <linux/string.h>
++#include <linux/delay.h>
++#include <linux/smp.h>
++#include <linux/module.h>
++#include <linux/percpu.h>
++#include <linux/bootmem.h>
++#include <asm/semaphore.h>
++#include <asm/processor.h>
++#include <asm/i387.h>
++#include <asm/msr.h>
++#include <asm/io.h>
++#include <asm/mmu_context.h>
++#include <asm/mtrr.h>
++#include <asm/mce.h>
++#ifdef CONFIG_X86_LOCAL_APIC
++#include <asm/mpspec.h>
++#include <asm/apic.h>
++#include <mach_apic.h>
++#else
++#ifdef CONFIG_XEN
++#define phys_pkg_id(a,b) a
++#endif
++#endif
++#include <asm/hypervisor.h>
++
++#include "cpu.h"
++
++DEFINE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
++EXPORT_PER_CPU_SYMBOL(cpu_gdt_descr);
++
++#ifndef CONFIG_XEN
++DEFINE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
++EXPORT_PER_CPU_SYMBOL(cpu_16bit_stack);
++#endif
++
++static int cachesize_override __cpuinitdata = -1;
++static int disable_x86_fxsr __cpuinitdata;
++static int disable_x86_serial_nr __cpuinitdata = 1;
++static int disable_x86_sep __cpuinitdata;
++
++struct cpu_dev * cpu_devs[X86_VENDOR_NUM] = {};
++
++extern int disable_pse;
++
++static void default_init(struct cpuinfo_x86 * c)
++{
++ /* Not much we can do here... */
++ /* Check if at least it has cpuid */
++ if (c->cpuid_level == -1) {
++ /* No cpuid. It must be an ancient CPU */
++ if (c->x86 == 4)
++ strcpy(c->x86_model_id, "486");
++ else if (c->x86 == 3)
++ strcpy(c->x86_model_id, "386");
++ }
++}
++
++static struct cpu_dev default_cpu = {
++ .c_init = default_init,
++ .c_vendor = "Unknown",
++};
++static struct cpu_dev * this_cpu = &default_cpu;
++
++static int __init cachesize_setup(char *str)
++{
++ get_option (&str, &cachesize_override);
++ return 1;
++}
++__setup("cachesize=", cachesize_setup);
++
++int __cpuinit get_model_name(struct cpuinfo_x86 *c)
++{
++ unsigned int *v;
++ char *p, *q;
++
++ if (cpuid_eax(0x80000000) < 0x80000004)
++ return 0;
++
++ v = (unsigned int *) c->x86_model_id;
++ cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
++ cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
++ cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
++ c->x86_model_id[48] = 0;
++
++ /* Intel chips right-justify this string for some dumb reason;
++ undo that brain damage */
++ p = q = &c->x86_model_id[0];
++ while ( *p == ' ' )
++ p++;
++ if ( p != q ) {
++ while ( *p )
++ *q++ = *p++;
++ while ( q <= &c->x86_model_id[48] )
++ *q++ = '\0'; /* Zero-pad the rest */
++ }
++
++ return 1;
++}
++
++
++void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
++{
++ unsigned int n, dummy, ecx, edx, l2size;
++
++ n = cpuid_eax(0x80000000);
++
++ if (n >= 0x80000005) {
++ cpuid(0x80000005, &dummy, &dummy, &ecx, &edx);
++ printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
++ edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
++ c->x86_cache_size=(ecx>>24)+(edx>>24);
++ }
++
++ if (n < 0x80000006) /* Some chips just has a large L1. */
++ return;
++
++ ecx = cpuid_ecx(0x80000006);
++ l2size = ecx >> 16;
++
++ /* do processor-specific cache resizing */
++ if (this_cpu->c_size_cache)
++ l2size = this_cpu->c_size_cache(c,l2size);
++
++ /* Allow user to override all this if necessary. */
++ if (cachesize_override != -1)
++ l2size = cachesize_override;
++
++ if ( l2size == 0 )
++ return; /* Again, no L2 cache is possible */
++
++ c->x86_cache_size = l2size;
++
++ printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
++ l2size, ecx & 0xFF);
++}
++
++/* Naming convention should be: <Name> [(<Codename>)] */
++/* This table only is used unless init_<vendor>() below doesn't set it; */
++/* in particular, if CPUID levels 0x80000002..4 are supported, this isn't used */
++
++/* Look up CPU names by table lookup. */
++static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c)
++{
++ struct cpu_model_info *info;
++
++ if ( c->x86_model >= 16 )
++ return NULL; /* Range check */
++
++ if (!this_cpu)
++ return NULL;
++
++ info = this_cpu->c_models;
++
++ while (info && info->family) {
++ if (info->family == c->x86)
++ return info->model_names[c->x86_model];
++ info++;
++ }
++ return NULL; /* Not found */
++}
++
++
++static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c, int early)
++{
++ char *v = c->x86_vendor_id;
++ int i;
++ static int printed;
++
++ for (i = 0; i < X86_VENDOR_NUM; i++) {
++ if (cpu_devs[i]) {
++ if (!strcmp(v,cpu_devs[i]->c_ident[0]) ||
++ (cpu_devs[i]->c_ident[1] &&
++ !strcmp(v,cpu_devs[i]->c_ident[1]))) {
++ c->x86_vendor = i;
++ if (!early)
++ this_cpu = cpu_devs[i];
++ return;
++ }
++ }
++ }
++ if (!printed) {
++ printed++;
++ printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
++ printk(KERN_ERR "CPU: Your system may be unstable.\n");
++ }
++ c->x86_vendor = X86_VENDOR_UNKNOWN;
++ this_cpu = &default_cpu;
++}
++
++
++static int __init x86_fxsr_setup(char * s)
++{
++ disable_x86_fxsr = 1;
++ return 1;
++}
++__setup("nofxsr", x86_fxsr_setup);
++
++
++static int __init x86_sep_setup(char * s)
++{
++ disable_x86_sep = 1;
++ return 1;
++}
++__setup("nosep", x86_sep_setup);
++
++
++/* Standard macro to see if a specific flag is changeable */
++static inline int flag_is_changeable_p(u32 flag)
++{
++ u32 f1, f2;
++
++ asm("pushfl\n\t"
++ "pushfl\n\t"
++ "popl %0\n\t"
++ "movl %0,%1\n\t"
++ "xorl %2,%0\n\t"
++ "pushl %0\n\t"
++ "popfl\n\t"
++ "pushfl\n\t"
++ "popl %0\n\t"
++ "popfl\n\t"
++ : "=&r" (f1), "=&r" (f2)
++ : "ir" (flag));
++
++ return ((f1^f2) & flag) != 0;
++}
++
++
++/* Probe for the CPUID instruction */
++static int __cpuinit have_cpuid_p(void)
++{
++ return flag_is_changeable_p(X86_EFLAGS_ID);
++}
++
++/* Do minimum CPU detection early.
++ Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment.
++ The others are not touched to avoid unwanted side effects.
++
++ WARNING: this function is only called on the BP. Don't add code here
++ that is supposed to run on all CPUs. */
++static void __init early_cpu_detect(void)
++{
++ struct cpuinfo_x86 *c = &boot_cpu_data;
++
++ c->x86_cache_alignment = 32;
++
++ if (!have_cpuid_p())
++ return;
++
++ /* Get vendor name */
++ cpuid(0x00000000, &c->cpuid_level,
++ (int *)&c->x86_vendor_id[0],
++ (int *)&c->x86_vendor_id[8],
++ (int *)&c->x86_vendor_id[4]);
++
++ get_cpu_vendor(c, 1);
++
++ c->x86 = 4;
++ if (c->cpuid_level >= 0x00000001) {
++ u32 junk, tfms, cap0, misc;
++ cpuid(0x00000001, &tfms, &misc, &junk, &cap0);
++ c->x86 = (tfms >> 8) & 15;
++ c->x86_model = (tfms >> 4) & 15;
++ if (c->x86 == 0xf)
++ c->x86 += (tfms >> 20) & 0xff;
++ if (c->x86 >= 0x6)
++ c->x86_model += ((tfms >> 16) & 0xF) << 4;
++ c->x86_mask = tfms & 15;
++ if (cap0 & (1<<19))
++ c->x86_cache_alignment = ((misc >> 8) & 0xff) * 8;
++ }
++}
++
++void __cpuinit generic_identify(struct cpuinfo_x86 * c)
++{
++ u32 tfms, xlvl;
++ int ebx;
++
++ if (have_cpuid_p()) {
++ /* Get vendor name */
++ cpuid(0x00000000, &c->cpuid_level,
++ (int *)&c->x86_vendor_id[0],
++ (int *)&c->x86_vendor_id[8],
++ (int *)&c->x86_vendor_id[4]);
++
++ get_cpu_vendor(c, 0);
++ /* Initialize the standard set of capabilities */
++ /* Note that the vendor-specific code below might override */
++
++ /* Intel-defined flags: level 0x00000001 */
++ if ( c->cpuid_level >= 0x00000001 ) {
++ u32 capability, excap;
++ cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
++ c->x86_capability[0] = capability;
++ c->x86_capability[4] = excap;
++ c->x86 = (tfms >> 8) & 15;
++ c->x86_model = (tfms >> 4) & 15;
++ if (c->x86 == 0xf)
++ c->x86 += (tfms >> 20) & 0xff;
++ if (c->x86 >= 0x6)
++ c->x86_model += ((tfms >> 16) & 0xF) << 4;
++ c->x86_mask = tfms & 15;
++#ifdef CONFIG_X86_HT
++ c->apicid = phys_pkg_id((ebx >> 24) & 0xFF, 0);
++#else
++ c->apicid = (ebx >> 24) & 0xFF;
++#endif
++ } else {
++ /* Have CPUID level 0 only - unheard of */
++ c->x86 = 4;
++ }
++
++ /* AMD-defined flags: level 0x80000001 */
++ xlvl = cpuid_eax(0x80000000);
++ if ( (xlvl & 0xffff0000) == 0x80000000 ) {
++ if ( xlvl >= 0x80000001 ) {
++ c->x86_capability[1] = cpuid_edx(0x80000001);
++ c->x86_capability[6] = cpuid_ecx(0x80000001);
++ }
++ if ( xlvl >= 0x80000004 )
++ get_model_name(c); /* Default name */
++ }
++ }
++
++ early_intel_workaround(c);
++
++#ifdef CONFIG_X86_HT
++ c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
++#endif
++}
++
++static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
++{
++ if (cpu_has(c, X86_FEATURE_PN) && disable_x86_serial_nr ) {
++ /* Disable processor serial number */
++ unsigned long lo,hi;
++ rdmsr(MSR_IA32_BBL_CR_CTL,lo,hi);
++ lo |= 0x200000;
++ wrmsr(MSR_IA32_BBL_CR_CTL,lo,hi);
++ printk(KERN_NOTICE "CPU serial number disabled.\n");
++ clear_bit(X86_FEATURE_PN, c->x86_capability);
++
++ /* Disabling the serial number may affect the cpuid level */
++ c->cpuid_level = cpuid_eax(0);
++ }
++}
++
++static int __init x86_serial_nr_setup(char *s)
++{
++ disable_x86_serial_nr = 0;
++ return 1;
++}
++__setup("serialnumber", x86_serial_nr_setup);
++
++
++
++/*
++ * This does the hard work of actually picking apart the CPU stuff...
++ */
++void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
++{
++ int i;
++
++ c->loops_per_jiffy = loops_per_jiffy;
++ c->x86_cache_size = -1;
++ c->x86_vendor = X86_VENDOR_UNKNOWN;
++ c->cpuid_level = -1; /* CPUID not detected */
++ c->x86_model = c->x86_mask = 0; /* So far unknown... */
++ c->x86_vendor_id[0] = '\0'; /* Unset */
++ c->x86_model_id[0] = '\0'; /* Unset */
++ c->x86_max_cores = 1;
++ memset(&c->x86_capability, 0, sizeof c->x86_capability);
++
++ if (!have_cpuid_p()) {
++ /* First of all, decide if this is a 486 or higher */
++ /* It's a 486 if we can modify the AC flag */
++ if ( flag_is_changeable_p(X86_EFLAGS_AC) )
++ c->x86 = 4;
++ else
++ c->x86 = 3;
++ }
++
++ generic_identify(c);
++
++ printk(KERN_DEBUG "CPU: After generic identify, caps:");
++ for (i = 0; i < NCAPINTS; i++)
++ printk(" %08lx", c->x86_capability[i]);
++ printk("\n");
++
++ if (this_cpu->c_identify) {
++ this_cpu->c_identify(c);
++
++ printk(KERN_DEBUG "CPU: After vendor identify, caps:");
++ for (i = 0; i < NCAPINTS; i++)
++ printk(" %08lx", c->x86_capability[i]);
++ printk("\n");
++ }
++
++ /*
++ * Vendor-specific initialization. In this section we
++ * canonicalize the feature flags, meaning if there are
++ * features a certain CPU supports which CPUID doesn't
++ * tell us, CPUID claiming incorrect flags, or other bugs,
++ * we handle them here.
++ *
++ * At the end of this section, c->x86_capability better
++ * indicate the features this CPU genuinely supports!
++ */
++ if (this_cpu->c_init)
++ this_cpu->c_init(c);
++
++ /* Disable the PN if appropriate */
++ squash_the_stupid_serial_number(c);
++
++ /*
++ * The vendor-specific functions might have changed features. Now
++ * we do "generic changes."
++ */
++
++ /* TSC disabled? */
++ if ( tsc_disable )
++ clear_bit(X86_FEATURE_TSC, c->x86_capability);
++
++ /* FXSR disabled? */
++ if (disable_x86_fxsr) {
++ clear_bit(X86_FEATURE_FXSR, c->x86_capability);
++ clear_bit(X86_FEATURE_XMM, c->x86_capability);
++ }
++
++ /* SEP disabled? */
++ if (disable_x86_sep)
++ clear_bit(X86_FEATURE_SEP, c->x86_capability);
++
++ if (disable_pse)
++ clear_bit(X86_FEATURE_PSE, c->x86_capability);
++
++ /* If the model name is still unset, do table lookup. */
++ if ( !c->x86_model_id[0] ) {
++ char *p;
++ p = table_lookup_model(c);
++ if ( p )
++ strcpy(c->x86_model_id, p);
++ else
++ /* Last resort... */
++ sprintf(c->x86_model_id, "%02x/%02x",
++ c->x86, c->x86_model);
++ }
++
++ /* Now the feature flags better reflect actual CPU features! */
++
++ printk(KERN_DEBUG "CPU: After all inits, caps:");
++ for (i = 0; i < NCAPINTS; i++)
++ printk(" %08lx", c->x86_capability[i]);
++ printk("\n");
++
++ /*
++ * On SMP, boot_cpu_data holds the common feature set between
++ * all CPUs; so make sure that we indicate which features are
++ * common between the CPUs. The first time this routine gets
++ * executed, c == &boot_cpu_data.
++ */
++ if ( c != &boot_cpu_data ) {
++ /* AND the already accumulated flags with these */
++ for ( i = 0 ; i < NCAPINTS ; i++ )
++ boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
++ }
++
++ /* Init Machine Check Exception if available. */
++ mcheck_init(c);
++
++ if (c == &boot_cpu_data)
++ sysenter_setup();
++ enable_sep_cpu();
++
++ if (c == &boot_cpu_data)
++ mtrr_bp_init();
++ else
++ mtrr_ap_init();
++}
++
++#ifdef CONFIG_X86_HT
++void __cpuinit detect_ht(struct cpuinfo_x86 *c)
++{
++ u32 eax, ebx, ecx, edx;
++ int index_msb, core_bits;
++
++ cpuid(1, &eax, &ebx, &ecx, &edx);
++
++ if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
++ return;
++
++ smp_num_siblings = (ebx & 0xff0000) >> 16;
++
++ if (smp_num_siblings == 1) {
++ printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
++ } else if (smp_num_siblings > 1 ) {
++
++ if (smp_num_siblings > NR_CPUS) {
++ printk(KERN_WARNING "CPU: Unsupported number of the "
++ "siblings %d", smp_num_siblings);
++ smp_num_siblings = 1;
++ return;
++ }
++
++ index_msb = get_count_order(smp_num_siblings);
++ c->phys_proc_id = phys_pkg_id((ebx >> 24) & 0xFF, index_msb);
++
++ printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
++ c->phys_proc_id);
++
++ smp_num_siblings = smp_num_siblings / c->x86_max_cores;
++
++ index_msb = get_count_order(smp_num_siblings) ;
++
++ core_bits = get_count_order(c->x86_max_cores);
++
++ c->cpu_core_id = phys_pkg_id((ebx >> 24) & 0xFF, index_msb) &
++ ((1 << core_bits) - 1);
++
++ if (c->x86_max_cores > 1)
++ printk(KERN_INFO "CPU: Processor Core ID: %d\n",
++ c->cpu_core_id);
++ }
++}
++#endif
++
++void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
++{
++ char *vendor = NULL;
++
++ if (c->x86_vendor < X86_VENDOR_NUM)
++ vendor = this_cpu->c_vendor;
++ else if (c->cpuid_level >= 0)
++ vendor = c->x86_vendor_id;
++
++ if (vendor && strncmp(c->x86_model_id, vendor, strlen(vendor)))
++ printk("%s ", vendor);
++
++ if (!c->x86_model_id[0])
++ printk("%d86", c->x86);
++ else
++ printk("%s", c->x86_model_id);
++
++ if (c->x86_mask || c->cpuid_level >= 0)
++ printk(" stepping %02x\n", c->x86_mask);
++ else
++ printk("\n");
++}
++
++cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
++
++/* This is hacky. :)
++ * We're emulating future behavior.
++ * In the future, the cpu-specific init functions will be called implicitly
++ * via the magic of initcalls.
++ * They will insert themselves into the cpu_devs structure.
++ * Then, when cpu_init() is called, we can just iterate over that array.
++ */
++
++extern int intel_cpu_init(void);
++extern int cyrix_init_cpu(void);
++extern int nsc_init_cpu(void);
++extern int amd_init_cpu(void);
++extern int centaur_init_cpu(void);
++extern int transmeta_init_cpu(void);
++extern int rise_init_cpu(void);
++extern int nexgen_init_cpu(void);
++extern int umc_init_cpu(void);
++
++void __init early_cpu_init(void)
++{
++ intel_cpu_init();
++ cyrix_init_cpu();
++ nsc_init_cpu();
++ amd_init_cpu();
++ centaur_init_cpu();
++ transmeta_init_cpu();
++ rise_init_cpu();
++ nexgen_init_cpu();
++ umc_init_cpu();
++ early_cpu_detect();
++
++#ifdef CONFIG_DEBUG_PAGEALLOC
++ /* pse is not compatible with on-the-fly unmapping,
++ * disable it even if the cpus claim to support it.
++ */
++ clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
++ disable_pse = 1;
++#endif
++}
++
++static void __cpuinit cpu_gdt_init(const struct Xgt_desc_struct *gdt_descr)
++{
++ unsigned long frames[16];
++ unsigned long va;
++ int f;
++
++ for (va = gdt_descr->address, f = 0;
++ va < gdt_descr->address + gdt_descr->size;
++ va += PAGE_SIZE, f++) {
++ frames[f] = virt_to_mfn(va);
++ make_lowmem_page_readonly(
++ (void *)va, XENFEAT_writable_descriptor_tables);
++ }
++ if (HYPERVISOR_set_gdt(frames, (gdt_descr->size + 1) / 8))
++ BUG();
++}
++
++/*
++ * cpu_init() initializes state that is per-CPU. Some data is already
++ * initialized (naturally) in the bootstrap process, such as the GDT
++ * and IDT. We reload them nevertheless, this function acts as a
++ * 'CPU state barrier', nothing should get across.
++ */
++void __cpuinit cpu_init(void)
++{
++ int cpu = smp_processor_id();
++#ifndef CONFIG_X86_NO_TSS
++ struct tss_struct * t = &per_cpu(init_tss, cpu);
++#endif
++ struct thread_struct *thread = ¤t->thread;
++ struct desc_struct *gdt;
++ struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++
++ if (cpu_test_and_set(cpu, cpu_initialized)) {
++ printk(KERN_WARNING "CPU#%d already initialized!\n", cpu);
++ for (;;) local_irq_enable();
++ }
++ printk(KERN_INFO "Initializing CPU#%d\n", cpu);
++
++ if (cpu_has_vme || cpu_has_de)
++ clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
++ if (tsc_disable && cpu_has_tsc) {
++ printk(KERN_NOTICE "Disabling TSC...\n");
++ /**** FIX-HPA: DOES THIS REALLY BELONG HERE? ****/
++ clear_bit(X86_FEATURE_TSC, boot_cpu_data.x86_capability);
++ set_in_cr4(X86_CR4_TSD);
++ }
++
++#ifndef CONFIG_XEN
++ /* The CPU hotplug case */
++ if (cpu_gdt_descr->address) {
++ gdt = (struct desc_struct *)cpu_gdt_descr->address;
++ memset(gdt, 0, PAGE_SIZE);
++ goto old_gdt;
++ }
++ /*
++ * This is a horrible hack to allocate the GDT. The problem
++ * is that cpu_init() is called really early for the boot CPU
++ * (and hence needs bootmem) but much later for the secondary
++ * CPUs, when bootmem will have gone away
++ */
++ if (NODE_DATA(0)->bdata->node_bootmem_map) {
++ gdt = (struct desc_struct *)alloc_bootmem_pages(PAGE_SIZE);
++ /* alloc_bootmem_pages panics on failure, so no check */
++ memset(gdt, 0, PAGE_SIZE);
++ } else {
++ gdt = (struct desc_struct *)get_zeroed_page(GFP_KERNEL);
++ if (unlikely(!gdt)) {
++ printk(KERN_CRIT "CPU%d failed to allocate GDT\n", cpu);
++ for (;;)
++ local_irq_enable();
++ }
++ }
++old_gdt:
++ /*
++ * Initialize the per-CPU GDT with the boot GDT,
++ * and set up the GDT descriptor:
++ */
++ memcpy(gdt, cpu_gdt_table, GDT_SIZE);
++
++ /* Set up GDT entry for 16bit stack */
++ *(__u64 *)(&gdt[GDT_ENTRY_ESPFIX_SS]) |=
++ ((((__u64)stk16_off) << 16) & 0x000000ffffff0000ULL) |
++ ((((__u64)stk16_off) << 32) & 0xff00000000000000ULL) |
++ (CPU_16BIT_STACK_SIZE - 1);
++
++ cpu_gdt_descr->size = GDT_SIZE - 1;
++ cpu_gdt_descr->address = (unsigned long)gdt;
++#else
++ if (cpu == 0 && cpu_gdt_descr->address == 0) {
++ gdt = (struct desc_struct *)alloc_bootmem_pages(PAGE_SIZE);
++ /* alloc_bootmem_pages panics on failure, so no check */
++ memset(gdt, 0, PAGE_SIZE);
++
++ memcpy(gdt, cpu_gdt_table, GDT_SIZE);
++
++ cpu_gdt_descr->size = GDT_SIZE;
++ cpu_gdt_descr->address = (unsigned long)gdt;
++ }
++#endif
++
++ cpu_gdt_init(cpu_gdt_descr);
++
++ /*
++ * Set up and load the per-CPU TSS and LDT
++ */
++ atomic_inc(&init_mm.mm_count);
++ current->active_mm = &init_mm;
++ if (current->mm)
++ BUG();
++ enter_lazy_tlb(&init_mm, current);
++
++ load_esp0(t, thread);
++
++ load_LDT(&init_mm.context);
++
++#ifdef CONFIG_DOUBLEFAULT
++ /* Set up doublefault TSS pointer in the GDT */
++ __set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);
++#endif
++
++ /* Clear %fs and %gs. */
++ asm volatile ("xorl %eax, %eax; movl %eax, %fs; movl %eax, %gs");
++
++ /* Clear all 6 debug registers: */
++ set_debugreg(0, 0);
++ set_debugreg(0, 1);
++ set_debugreg(0, 2);
++ set_debugreg(0, 3);
++ set_debugreg(0, 6);
++ set_debugreg(0, 7);
++
++ /*
++ * Force FPU initialization:
++ */
++ current_thread_info()->status = 0;
++ clear_used_math();
++ mxcsr_feature_mask_init();
++}
++
++#ifdef CONFIG_HOTPLUG_CPU
++void __cpuinit cpu_uninit(void)
++{
++ int cpu = raw_smp_processor_id();
++ cpu_clear(cpu, cpu_initialized);
++
++ /* lazy TLB state */
++ per_cpu(cpu_tlbstate, cpu).state = 0;
++ per_cpu(cpu_tlbstate, cpu).active_mm = &init_mm;
++}
++#endif
+Index: head-2008-11-25/arch/x86/kernel/cpu/mtrr/main-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/cpu/mtrr/main-xen.c 2008-01-28 12:24:18.000000000 +0100
+@@ -0,0 +1,198 @@
++#include <linux/init.h>
++#include <linux/proc_fs.h>
++#include <linux/ctype.h>
++#include <linux/module.h>
++#include <linux/seq_file.h>
++#include <asm/uaccess.h>
++#include <linux/mutex.h>
++
++#include <asm/mtrr.h>
++#include "mtrr.h"
++
++static DEFINE_MUTEX(mtrr_mutex);
++
++void generic_get_mtrr(unsigned int reg, unsigned long *base,
++ unsigned int *size, mtrr_type * type)
++{
++ struct xen_platform_op op;
++
++ op.cmd = XENPF_read_memtype;
++ op.u.read_memtype.reg = reg;
++ if (unlikely(HYPERVISOR_platform_op(&op)))
++ memset(&op.u.read_memtype, 0, sizeof(op.u.read_memtype));
++
++ *size = op.u.read_memtype.nr_mfns;
++ *base = op.u.read_memtype.mfn;
++ *type = op.u.read_memtype.type;
++}
++
++struct mtrr_ops generic_mtrr_ops = {
++ .use_intel_if = 1,
++ .get = generic_get_mtrr,
++};
++
++struct mtrr_ops *mtrr_if = &generic_mtrr_ops;
++unsigned int num_var_ranges;
++unsigned int *usage_table;
++
++static void __init set_num_var_ranges(void)
++{
++ struct xen_platform_op op;
++
++ for (num_var_ranges = 0; ; num_var_ranges++) {
++ op.cmd = XENPF_read_memtype;
++ op.u.read_memtype.reg = num_var_ranges;
++ if (HYPERVISOR_platform_op(&op) != 0)
++ break;
++ }
++}
++
++static void __init init_table(void)
++{
++ int i, max;
++
++ max = num_var_ranges;
++ if ((usage_table = kmalloc(max * sizeof *usage_table, GFP_KERNEL))
++ == NULL) {
++ printk(KERN_ERR "mtrr: could not allocate\n");
++ return;
++ }
++ for (i = 0; i < max; i++)
++ usage_table[i] = 0;
++}
++
++int mtrr_add_page(unsigned long base, unsigned long size,
++ unsigned int type, char increment)
++{
++ int error;
++ struct xen_platform_op op;
++
++ mutex_lock(&mtrr_mutex);
++
++ op.cmd = XENPF_add_memtype;
++ op.u.add_memtype.mfn = base;
++ op.u.add_memtype.nr_mfns = size;
++ op.u.add_memtype.type = type;
++ error = HYPERVISOR_platform_op(&op);
++ if (error) {
++ mutex_unlock(&mtrr_mutex);
++ BUG_ON(error > 0);
++ return error;
++ }
++
++ if (increment)
++ ++usage_table[op.u.add_memtype.reg];
++
++ mutex_unlock(&mtrr_mutex);
++
++ return op.u.add_memtype.reg;
++}
++
++static int mtrr_check(unsigned long base, unsigned long size)
++{
++ if ((base & (PAGE_SIZE - 1)) || (size & (PAGE_SIZE - 1))) {
++ printk(KERN_WARNING
++ "mtrr: size and base must be multiples of 4 kiB\n");
++ printk(KERN_DEBUG
++ "mtrr: size: 0x%lx base: 0x%lx\n", size, base);
++ dump_stack();
++ return -1;
++ }
++ return 0;
++}
++
++int
++mtrr_add(unsigned long base, unsigned long size, unsigned int type,
++ char increment)
++{
++ if (mtrr_check(base, size))
++ return -EINVAL;
++ return mtrr_add_page(base >> PAGE_SHIFT, size >> PAGE_SHIFT, type,
++ increment);
++}
++
++int mtrr_del_page(int reg, unsigned long base, unsigned long size)
++{
++ unsigned i;
++ mtrr_type ltype;
++ unsigned long lbase;
++ unsigned int lsize;
++ int error = -EINVAL;
++ struct xen_platform_op op;
++
++ mutex_lock(&mtrr_mutex);
++
++ if (reg < 0) {
++ /* Search for existing MTRR */
++ for (i = 0; i < num_var_ranges; ++i) {
++ mtrr_if->get(i, &lbase, &lsize, <ype);
++ if (lbase == base && lsize == size) {
++ reg = i;
++ break;
++ }
++ }
++ if (reg < 0) {
++ printk(KERN_DEBUG "mtrr: no MTRR for %lx000,%lx000 found\n", base,
++ size);
++ goto out;
++ }
++ }
++ if (usage_table[reg] < 1) {
++ printk(KERN_WARNING "mtrr: reg: %d has count=0\n", reg);
++ goto out;
++ }
++ if (--usage_table[reg] < 1) {
++ op.cmd = XENPF_del_memtype;
++ op.u.del_memtype.handle = 0;
++ op.u.del_memtype.reg = reg;
++ error = HYPERVISOR_platform_op(&op);
++ if (error) {
++ BUG_ON(error > 0);
++ goto out;
++ }
++ }
++ error = reg;
++ out:
++ mutex_unlock(&mtrr_mutex);
++ return error;
++}
++
++int
++mtrr_del(int reg, unsigned long base, unsigned long size)
++{
++ if (mtrr_check(base, size))
++ return -EINVAL;
++ return mtrr_del_page(reg, base >> PAGE_SHIFT, size >> PAGE_SHIFT);
++}
++
++EXPORT_SYMBOL(mtrr_add);
++EXPORT_SYMBOL(mtrr_del);
++
++void __init mtrr_bp_init(void)
++{
++}
++
++void mtrr_ap_init(void)
++{
++}
++
++static int __init mtrr_init(void)
++{
++ struct cpuinfo_x86 *c = &boot_cpu_data;
++
++ if (!is_initial_xendomain())
++ return -ENODEV;
++
++ if ((!cpu_has(c, X86_FEATURE_MTRR)) &&
++ (!cpu_has(c, X86_FEATURE_K6_MTRR)) &&
++ (!cpu_has(c, X86_FEATURE_CYRIX_ARR)) &&
++ (!cpu_has(c, X86_FEATURE_CENTAUR_MCR)))
++ return -ENODEV;
++
++ set_num_var_ranges();
++ init_table();
++
++ return 0;
++}
++
++subsys_initcall(mtrr_init);
+Index: head-2008-11-25/arch/x86/kernel/entry_32-xen.S
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/entry_32-xen.S 2007-12-10 08:47:31.000000000 +0100
+@@ -0,0 +1,1238 @@
++/*
++ * linux/arch/i386/entry.S
++ *
++ * Copyright (C) 1991, 1992 Linus Torvalds
++ */
++
++/*
++ * entry.S contains the system-call and fault low-level handling routines.
++ * This also contains the timer-interrupt handler, as well as all interrupts
++ * and faults that can result in a task-switch.
++ *
++ * NOTE: This code handles signal-recognition, which happens every time
++ * after a timer-interrupt and after each system call.
++ *
++ * I changed all the .align's to 4 (16 byte alignment), as that's faster
++ * on a 486.
++ *
++ * Stack layout in 'ret_from_system_call':
++ * ptrace needs to have all regs on the stack.
++ * if the order here is changed, it needs to be
++ * updated in fork.c:copy_process, signal.c:do_signal,
++ * ptrace.c and ptrace.h
++ *
++ * 0(%esp) - %ebx
++ * 4(%esp) - %ecx
++ * 8(%esp) - %edx
++ * C(%esp) - %esi
++ * 10(%esp) - %edi
++ * 14(%esp) - %ebp
++ * 18(%esp) - %eax
++ * 1C(%esp) - %ds
++ * 20(%esp) - %es
++ * 24(%esp) - orig_eax
++ * 28(%esp) - %eip
++ * 2C(%esp) - %cs
++ * 30(%esp) - %eflags
++ * 34(%esp) - %oldesp
++ * 38(%esp) - %oldss
++ *
++ * "current" is in register %ebx during any slow entries.
++ */
++
++#include <linux/linkage.h>
++#include <asm/thread_info.h>
++#include <asm/irqflags.h>
++#include <asm/errno.h>
++#include <asm/segment.h>
++#include <asm/smp.h>
++#include <asm/page.h>
++#include <asm/desc.h>
++#include <asm/dwarf2.h>
++#include "irq_vectors.h"
++#include <xen/interface/xen.h>
++
++#define nr_syscalls ((syscall_table_size)/4)
++
++EBX = 0x00
++ECX = 0x04
++EDX = 0x08
++ESI = 0x0C
++EDI = 0x10
++EBP = 0x14
++EAX = 0x18
++DS = 0x1C
++ES = 0x20
++ORIG_EAX = 0x24
++EIP = 0x28
++CS = 0x2C
++EFLAGS = 0x30
++OLDESP = 0x34
++OLDSS = 0x38
++
++CF_MASK = 0x00000001
++TF_MASK = 0x00000100
++IF_MASK = 0x00000200
++DF_MASK = 0x00000400
++NT_MASK = 0x00004000
++VM_MASK = 0x00020000
++/* Pseudo-eflags. */
++NMI_MASK = 0x80000000
++
++#ifndef CONFIG_XEN
++#define DISABLE_INTERRUPTS cli
++#define ENABLE_INTERRUPTS sti
++#else
++/* Offsets into shared_info_t. */
++#define evtchn_upcall_pending /* 0 */
++#define evtchn_upcall_mask 1
++
++#define sizeof_vcpu_shift 6
++
++#ifdef CONFIG_SMP
++#define GET_VCPU_INFO movl TI_cpu(%ebp),%esi ; \
++ shl $sizeof_vcpu_shift,%esi ; \
++ addl HYPERVISOR_shared_info,%esi
++#else
++#define GET_VCPU_INFO movl HYPERVISOR_shared_info,%esi
++#endif
++
++#define __DISABLE_INTERRUPTS movb $1,evtchn_upcall_mask(%esi)
++#define __ENABLE_INTERRUPTS movb $0,evtchn_upcall_mask(%esi)
++#define DISABLE_INTERRUPTS GET_VCPU_INFO ; \
++ __DISABLE_INTERRUPTS
++#define ENABLE_INTERRUPTS GET_VCPU_INFO ; \
++ __ENABLE_INTERRUPTS
++#define __TEST_PENDING testb $0xFF,evtchn_upcall_pending(%esi)
++#endif
++
++#ifdef CONFIG_PREEMPT
++#define preempt_stop cli; TRACE_IRQS_OFF
++#else
++#define preempt_stop
++#define resume_kernel restore_nocheck
++#endif
++
++.macro TRACE_IRQS_IRET
++#ifdef CONFIG_TRACE_IRQFLAGS
++ testl $IF_MASK,EFLAGS(%esp) # interrupts off?
++ jz 1f
++ TRACE_IRQS_ON
++1:
++#endif
++.endm
++
++#ifdef CONFIG_VM86
++#define resume_userspace_sig check_userspace
++#else
++#define resume_userspace_sig resume_userspace
++#endif
++
++#define SAVE_ALL \
++ cld; \
++ pushl %es; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ /*CFI_REL_OFFSET es, 0;*/\
++ pushl %ds; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ /*CFI_REL_OFFSET ds, 0;*/\
++ pushl %eax; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ CFI_REL_OFFSET eax, 0;\
++ pushl %ebp; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ CFI_REL_OFFSET ebp, 0;\
++ pushl %edi; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ CFI_REL_OFFSET edi, 0;\
++ pushl %esi; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ CFI_REL_OFFSET esi, 0;\
++ pushl %edx; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ CFI_REL_OFFSET edx, 0;\
++ pushl %ecx; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ CFI_REL_OFFSET ecx, 0;\
++ pushl %ebx; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ CFI_REL_OFFSET ebx, 0;\
++ movl $(__USER_DS), %edx; \
++ movl %edx, %ds; \
++ movl %edx, %es;
++
++#define RESTORE_INT_REGS \
++ popl %ebx; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ CFI_RESTORE ebx;\
++ popl %ecx; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ CFI_RESTORE ecx;\
++ popl %edx; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ CFI_RESTORE edx;\
++ popl %esi; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ CFI_RESTORE esi;\
++ popl %edi; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ CFI_RESTORE edi;\
++ popl %ebp; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ CFI_RESTORE ebp;\
++ popl %eax; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ CFI_RESTORE eax
++
++#define RESTORE_REGS \
++ RESTORE_INT_REGS; \
++1: popl %ds; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ /*CFI_RESTORE ds;*/\
++2: popl %es; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ /*CFI_RESTORE es;*/\
++.section .fixup,"ax"; \
++3: movl $0,(%esp); \
++ jmp 1b; \
++4: movl $0,(%esp); \
++ jmp 2b; \
++.previous; \
++.section __ex_table,"a";\
++ .align 4; \
++ .long 1b,3b; \
++ .long 2b,4b; \
++.previous
++
++#define RING0_INT_FRAME \
++ CFI_STARTPROC simple;\
++ CFI_DEF_CFA esp, 3*4;\
++ /*CFI_OFFSET cs, -2*4;*/\
++ CFI_OFFSET eip, -3*4
++
++#define RING0_EC_FRAME \
++ CFI_STARTPROC simple;\
++ CFI_DEF_CFA esp, 4*4;\
++ /*CFI_OFFSET cs, -2*4;*/\
++ CFI_OFFSET eip, -3*4
++
++#define RING0_PTREGS_FRAME \
++ CFI_STARTPROC simple;\
++ CFI_DEF_CFA esp, OLDESP-EBX;\
++ /*CFI_OFFSET cs, CS-OLDESP;*/\
++ CFI_OFFSET eip, EIP-OLDESP;\
++ /*CFI_OFFSET es, ES-OLDESP;*/\
++ /*CFI_OFFSET ds, DS-OLDESP;*/\
++ CFI_OFFSET eax, EAX-OLDESP;\
++ CFI_OFFSET ebp, EBP-OLDESP;\
++ CFI_OFFSET edi, EDI-OLDESP;\
++ CFI_OFFSET esi, ESI-OLDESP;\
++ CFI_OFFSET edx, EDX-OLDESP;\
++ CFI_OFFSET ecx, ECX-OLDESP;\
++ CFI_OFFSET ebx, EBX-OLDESP
++
++ENTRY(ret_from_fork)
++ CFI_STARTPROC
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ call schedule_tail
++ GET_THREAD_INFO(%ebp)
++ popl %eax
++ CFI_ADJUST_CFA_OFFSET -4
++ pushl $0x0202 # Reset kernel eflags
++ CFI_ADJUST_CFA_OFFSET 4
++ popfl
++ CFI_ADJUST_CFA_OFFSET -4
++ jmp syscall_exit
++ CFI_ENDPROC
++
++/*
++ * Return to user mode is not as complex as all this looks,
++ * but we want the default path for a system call return to
++ * go as quickly as possible which is why some of this is
++ * less clear than it otherwise should be.
++ */
++
++ # userspace resumption stub bypassing syscall exit tracing
++ ALIGN
++ RING0_PTREGS_FRAME
++ret_from_exception:
++ preempt_stop
++ret_from_intr:
++ GET_THREAD_INFO(%ebp)
++check_userspace:
++ movl EFLAGS(%esp), %eax # mix EFLAGS and CS
++ movb CS(%esp), %al
++ testl $(VM_MASK | 2), %eax
++ jz resume_kernel
++ENTRY(resume_userspace)
++ DISABLE_INTERRUPTS # make sure we don't miss an interrupt
++ # setting need_resched or sigpending
++ # between sampling and the iret
++ movl TI_flags(%ebp), %ecx
++ andl $_TIF_WORK_MASK, %ecx # is there any work to be done on
++ # int/exception return?
++ jne work_pending
++ jmp restore_all
++
++#ifdef CONFIG_PREEMPT
++ENTRY(resume_kernel)
++ cli
++ cmpl $0,TI_preempt_count(%ebp) # non-zero preempt_count ?
++ jnz restore_nocheck
++need_resched:
++ movl TI_flags(%ebp), %ecx # need_resched set ?
++ testb $_TIF_NEED_RESCHED, %cl
++ jz restore_all
++ testl $IF_MASK,EFLAGS(%esp) # interrupts off (exception path) ?
++ jz restore_all
++ call preempt_schedule_irq
++ jmp need_resched
++#endif
++ CFI_ENDPROC
++
++/* SYSENTER_RETURN points to after the "sysenter" instruction in
++ the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */
++
++ # sysenter call handler stub
++ENTRY(sysenter_entry)
++ CFI_STARTPROC simple
++ CFI_DEF_CFA esp, 0
++ CFI_REGISTER esp, ebp
++ movl SYSENTER_stack_esp0(%esp),%esp
++sysenter_past_esp:
++ /*
++ * No need to follow this irqs on/off section: the syscall
++ * disabled irqs and here we enable it straight after entry:
++ */
++ sti
++ pushl $(__USER_DS)
++ CFI_ADJUST_CFA_OFFSET 4
++ /*CFI_REL_OFFSET ss, 0*/
++ pushl %ebp
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET esp, 0
++ pushfl
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $(__USER_CS)
++ CFI_ADJUST_CFA_OFFSET 4
++ /*CFI_REL_OFFSET cs, 0*/
++ /*
++ * Push current_thread_info()->sysenter_return to the stack.
++ * A tiny bit of offset fixup is necessary - 4*4 means the 4 words
++ * pushed above; +8 corresponds to copy_thread's esp0 setting.
++ */
++ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp)
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET eip, 0
++
++/*
++ * Load the potential sixth argument from user stack.
++ * Careful about security.
++ */
++ cmpl $__PAGE_OFFSET-3,%ebp
++ jae syscall_fault
++1: movl (%ebp),%ebp
++.section __ex_table,"a"
++ .align 4
++ .long 1b,syscall_fault
++.previous
++
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ GET_THREAD_INFO(%ebp)
++
++ /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
++ testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
++ jnz syscall_trace_entry
++ cmpl $(nr_syscalls), %eax
++ jae syscall_badsys
++ call *sys_call_table(,%eax,4)
++ movl %eax,EAX(%esp)
++ DISABLE_INTERRUPTS
++ TRACE_IRQS_OFF
++ movl TI_flags(%ebp), %ecx
++ testw $_TIF_ALLWORK_MASK, %cx
++ jne syscall_exit_work
++/* if something modifies registers it must also disable sysexit */
++ movl EIP(%esp), %edx
++ movl OLDESP(%esp), %ecx
++ xorl %ebp,%ebp
++#ifdef CONFIG_XEN
++ TRACE_IRQS_ON
++ __ENABLE_INTERRUPTS
++sysexit_scrit: /**** START OF SYSEXIT CRITICAL REGION ****/
++ __TEST_PENDING
++ jnz 14f # process more events if necessary...
++ movl ESI(%esp), %esi
++ sysexit
++14: __DISABLE_INTERRUPTS
++ TRACE_IRQS_OFF
++sysexit_ecrit: /**** END OF SYSEXIT CRITICAL REGION ****/
++ push %esp
++ call evtchn_do_upcall
++ add $4,%esp
++ jmp ret_from_intr
++#else
++ TRACE_IRQS_ON
++ sti
++ sysexit
++#endif /* !CONFIG_XEN */
++ CFI_ENDPROC
++
++ # pv sysenter call handler stub
++ENTRY(sysenter_entry_pv)
++ RING0_INT_FRAME
++ movl $__USER_DS,16(%esp)
++ movl %ebp,12(%esp)
++ movl $__USER_CS,4(%esp)
++ addl $4,%esp
++ /* +5*4 is SS:ESP,EFLAGS,CS:EIP. +8 is esp0 setting. */
++ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp)
++/*
++ * Load the potential sixth argument from user stack.
++ * Careful about security.
++ */
++ cmpl $__PAGE_OFFSET-3,%ebp
++ jae syscall_fault
++1: movl (%ebp),%ebp
++.section __ex_table,"a"
++ .align 4
++ .long 1b,syscall_fault
++.previous
++ /* fall through */
++ CFI_ENDPROC
++ENDPROC(sysenter_entry_pv)
++
++ # system call handler stub
++ENTRY(system_call)
++ RING0_INT_FRAME # can't unwind into user space anyway
++ pushl %eax # save orig_eax
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ GET_THREAD_INFO(%ebp)
++ testl $TF_MASK,EFLAGS(%esp)
++ jz no_singlestep
++ orl $_TIF_SINGLESTEP,TI_flags(%ebp)
++no_singlestep:
++ # system call tracing in operation / emulation
++ /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
++ testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
++ jnz syscall_trace_entry
++ cmpl $(nr_syscalls), %eax
++ jae syscall_badsys
++syscall_call:
++ call *sys_call_table(,%eax,4)
++ movl %eax,EAX(%esp) # store the return value
++syscall_exit:
++ DISABLE_INTERRUPTS # make sure we don't miss an interrupt
++ # setting need_resched or sigpending
++ # between sampling and the iret
++ TRACE_IRQS_OFF
++ movl TI_flags(%ebp), %ecx
++ testw $_TIF_ALLWORK_MASK, %cx # current->work
++ jne syscall_exit_work
++
++restore_all:
++#ifndef CONFIG_XEN
++ movl EFLAGS(%esp), %eax # mix EFLAGS, SS and CS
++ # Warning: OLDSS(%esp) contains the wrong/random values if we
++ # are returning to the kernel.
++ # See comments in process.c:copy_thread() for details.
++ movb OLDSS(%esp), %ah
++ movb CS(%esp), %al
++ andl $(VM_MASK | (4 << 8) | 3), %eax
++ cmpl $((4 << 8) | 3), %eax
++ CFI_REMEMBER_STATE
++ je ldt_ss # returning to user-space with LDT SS
++restore_nocheck:
++#else
++restore_nocheck:
++ movl EFLAGS(%esp), %eax
++ testl $(VM_MASK|NMI_MASK), %eax
++ CFI_REMEMBER_STATE
++ jnz hypervisor_iret
++ shr $9, %eax # EAX[0] == IRET_EFLAGS.IF
++ GET_VCPU_INFO
++ andb evtchn_upcall_mask(%esi),%al
++ andb $1,%al # EAX[0] == IRET_EFLAGS.IF & event_mask
++ CFI_REMEMBER_STATE
++ jnz restore_all_enable_events # != 0 => enable event delivery
++#endif
++ TRACE_IRQS_IRET
++restore_nocheck_notrace:
++ RESTORE_REGS
++ addl $4, %esp
++ CFI_ADJUST_CFA_OFFSET -4
++1: iret
++.section .fixup,"ax"
++iret_exc:
++#ifndef CONFIG_XEN
++ TRACE_IRQS_ON
++ sti
++#endif
++ pushl $0 # no error code
++ pushl $do_iret_error
++ jmp error_code
++.previous
++.section __ex_table,"a"
++ .align 4
++ .long 1b,iret_exc
++.previous
++
++ CFI_RESTORE_STATE
++#ifndef CONFIG_XEN
++ldt_ss:
++ larl OLDSS(%esp), %eax
++ jnz restore_nocheck
++ testl $0x00400000, %eax # returning to 32bit stack?
++ jnz restore_nocheck # allright, normal return
++ /* If returning to userspace with 16bit stack,
++ * try to fix the higher word of ESP, as the CPU
++ * won't restore it.
++ * This is an "official" bug of all the x86-compatible
++ * CPUs, which we can try to work around to make
++ * dosemu and wine happy. */
++ subl $8, %esp # reserve space for switch16 pointer
++ CFI_ADJUST_CFA_OFFSET 8
++ cli
++ TRACE_IRQS_OFF
++ movl %esp, %eax
++ /* Set up the 16bit stack frame with switch32 pointer on top,
++ * and a switch16 pointer on top of the current frame. */
++ call setup_x86_bogus_stack
++ CFI_ADJUST_CFA_OFFSET -8 # frame has moved
++ TRACE_IRQS_IRET
++ RESTORE_REGS
++ lss 20+4(%esp), %esp # switch to 16bit stack
++1: iret
++.section __ex_table,"a"
++ .align 4
++ .long 1b,iret_exc
++.previous
++#else
++ ALIGN
++restore_all_enable_events:
++ TRACE_IRQS_ON
++ __ENABLE_INTERRUPTS
++scrit: /**** START OF CRITICAL REGION ****/
++ __TEST_PENDING
++ jnz 14f # process more events if necessary...
++ RESTORE_REGS
++ addl $4, %esp
++ CFI_ADJUST_CFA_OFFSET -4
++1: iret
++.section __ex_table,"a"
++ .align 4
++ .long 1b,iret_exc
++.previous
++14: __DISABLE_INTERRUPTS
++ TRACE_IRQS_OFF
++ jmp 11f
++ecrit: /**** END OF CRITICAL REGION ****/
++
++ CFI_RESTORE_STATE
++hypervisor_iret:
++ andl $~NMI_MASK, EFLAGS(%esp)
++ RESTORE_REGS
++ addl $4, %esp
++ CFI_ADJUST_CFA_OFFSET -4
++ jmp hypercall_page + (__HYPERVISOR_iret * 32)
++#endif
++ CFI_ENDPROC
++
++ # perform work that needs to be done immediately before resumption
++ ALIGN
++ RING0_PTREGS_FRAME # can't unwind into user space anyway
++work_pending:
++ testb $_TIF_NEED_RESCHED, %cl
++ jz work_notifysig
++work_resched:
++ call schedule
++ DISABLE_INTERRUPTS # make sure we don't miss an interrupt
++ # setting need_resched or sigpending
++ # between sampling and the iret
++ TRACE_IRQS_OFF
++ movl TI_flags(%ebp), %ecx
++ andl $_TIF_WORK_MASK, %ecx # is there any work to be done other
++ # than syscall tracing?
++ jz restore_all
++ testb $_TIF_NEED_RESCHED, %cl
++ jnz work_resched
++
++work_notifysig: # deal with pending signals and
++ # notify-resume requests
++ testl $VM_MASK, EFLAGS(%esp)
++ movl %esp, %eax
++ jne work_notifysig_v86 # returning to kernel-space or
++ # vm86-space
++ xorl %edx, %edx
++ call do_notify_resume
++ jmp resume_userspace_sig
++
++ ALIGN
++work_notifysig_v86:
++#ifdef CONFIG_VM86
++ pushl %ecx # save ti_flags for do_notify_resume
++ CFI_ADJUST_CFA_OFFSET 4
++ call save_v86_state # %eax contains pt_regs pointer
++ popl %ecx
++ CFI_ADJUST_CFA_OFFSET -4
++ movl %eax, %esp
++ xorl %edx, %edx
++ call do_notify_resume
++ jmp resume_userspace_sig
++#endif
++
++ # perform syscall exit tracing
++ ALIGN
++syscall_trace_entry:
++ movl $-ENOSYS,EAX(%esp)
++ movl %esp, %eax
++ xorl %edx,%edx
++ call do_syscall_trace
++ cmpl $0, %eax
++ jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU,
++ # so must skip actual syscall
++ movl ORIG_EAX(%esp), %eax
++ cmpl $(nr_syscalls), %eax
++ jnae syscall_call
++ jmp syscall_exit
++
++ # perform syscall exit tracing
++ ALIGN
++syscall_exit_work:
++ testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl
++ jz work_pending
++ TRACE_IRQS_ON
++ ENABLE_INTERRUPTS # could let do_syscall_trace() call
++ # schedule() instead
++ movl %esp, %eax
++ movl $1, %edx
++ call do_syscall_trace
++ jmp resume_userspace
++ CFI_ENDPROC
++
++ RING0_INT_FRAME # can't unwind into user space anyway
++syscall_fault:
++ pushl %eax # save orig_eax
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ GET_THREAD_INFO(%ebp)
++ movl $-EFAULT,EAX(%esp)
++ jmp resume_userspace
++
++syscall_badsys:
++ movl $-ENOSYS,EAX(%esp)
++ jmp resume_userspace
++ CFI_ENDPROC
++
++#ifndef CONFIG_XEN
++#define FIXUP_ESPFIX_STACK \
++ movl %esp, %eax; \
++ /* switch to 32bit stack using the pointer on top of 16bit stack */ \
++ lss %ss:CPU_16BIT_STACK_SIZE-8, %esp; \
++ /* copy data from 16bit stack to 32bit stack */ \
++ call fixup_x86_bogus_stack; \
++ /* put ESP to the proper location */ \
++ movl %eax, %esp;
++#define UNWIND_ESPFIX_STACK \
++ pushl %eax; \
++ CFI_ADJUST_CFA_OFFSET 4; \
++ movl %ss, %eax; \
++ /* see if on 16bit stack */ \
++ cmpw $__ESPFIX_SS, %ax; \
++ je 28f; \
++27: popl %eax; \
++ CFI_ADJUST_CFA_OFFSET -4; \
++.section .fixup,"ax"; \
++28: movl $__KERNEL_DS, %eax; \
++ movl %eax, %ds; \
++ movl %eax, %es; \
++ /* switch to 32bit stack */ \
++ FIXUP_ESPFIX_STACK; \
++ jmp 27b; \
++.previous
++
++/*
++ * Build the entry stubs and pointer table with
++ * some assembler magic.
++ */
++.data
++ENTRY(interrupt)
++.text
++
++vector=0
++ENTRY(irq_entries_start)
++ RING0_INT_FRAME
++.rept NR_IRQS
++ ALIGN
++ .if vector
++ CFI_ADJUST_CFA_OFFSET -4
++ .endif
++1: pushl $~(vector)
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp common_interrupt
++.data
++ .long 1b
++.text
++vector=vector+1
++.endr
++
++/*
++ * the CPU automatically disables interrupts when executing an IRQ vector,
++ * so IRQ-flags tracing has to follow that:
++ */
++ ALIGN
++common_interrupt:
++ SAVE_ALL
++ TRACE_IRQS_OFF
++ movl %esp,%eax
++ call do_IRQ
++ jmp ret_from_intr
++ CFI_ENDPROC
++
++#define BUILD_INTERRUPT(name, nr) \
++ENTRY(name) \
++ RING0_INT_FRAME; \
++ pushl $~(nr); \
++ CFI_ADJUST_CFA_OFFSET 4; \
++ SAVE_ALL; \
++ TRACE_IRQS_OFF \
++ movl %esp,%eax; \
++ call smp_/**/name; \
++ jmp ret_from_intr; \
++ CFI_ENDPROC
++
++/* The include is where all of the SMP etc. interrupts come from */
++#include "entry_arch.h"
++#else
++#define UNWIND_ESPFIX_STACK
++#endif
++
++ENTRY(divide_error)
++ RING0_INT_FRAME
++ pushl $0 # no error code
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_divide_error
++ CFI_ADJUST_CFA_OFFSET 4
++ ALIGN
++error_code:
++ pushl %ds
++ CFI_ADJUST_CFA_OFFSET 4
++ /*CFI_REL_OFFSET ds, 0*/
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET eax, 0
++ xorl %eax, %eax
++ pushl %ebp
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET ebp, 0
++ pushl %edi
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET edi, 0
++ pushl %esi
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET esi, 0
++ pushl %edx
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET edx, 0
++ decl %eax # eax = -1
++ pushl %ecx
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET ecx, 0
++ pushl %ebx
++ CFI_ADJUST_CFA_OFFSET 4
++ CFI_REL_OFFSET ebx, 0
++ cld
++ pushl %es
++ CFI_ADJUST_CFA_OFFSET 4
++ /*CFI_REL_OFFSET es, 0*/
++ UNWIND_ESPFIX_STACK
++ popl %ecx
++ CFI_ADJUST_CFA_OFFSET -4
++ /*CFI_REGISTER es, ecx*/
++ movl ES(%esp), %edi # get the function address
++ movl ORIG_EAX(%esp), %edx # get the error code
++ movl %eax, ORIG_EAX(%esp)
++ movl %ecx, ES(%esp)
++ /*CFI_REL_OFFSET es, ES*/
++ movl $(__USER_DS), %ecx
++ movl %ecx, %ds
++ movl %ecx, %es
++ movl %esp,%eax # pt_regs pointer
++ call *%edi
++ jmp ret_from_exception
++ CFI_ENDPROC
++
++#ifdef CONFIG_XEN
++# A note on the "critical region" in our callback handler.
++# We want to avoid stacking callback handlers due to events occurring
++# during handling of the last event. To do this, we keep events disabled
++# until we've done all processing. HOWEVER, we must enable events before
++# popping the stack frame (can't be done atomically) and so it would still
++# be possible to get enough handler activations to overflow the stack.
++# Although unlikely, bugs of that kind are hard to track down, so we'd
++# like to avoid the possibility.
++# So, on entry to the handler we detect whether we interrupted an
++# existing activation in its critical region -- if so, we pop the current
++# activation and restart the handler using the previous one.
++#
++# The sysexit critical region is slightly different. sysexit
++# atomically removes the entire stack frame. If we interrupt in the
++# critical region we know that the entire frame is present and correct
++# so we can simply throw away the new one.
++ENTRY(hypervisor_callback)
++ RING0_INT_FRAME
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ movl EIP(%esp),%eax
++ cmpl $scrit,%eax
++ jb 11f
++ cmpl $ecrit,%eax
++ jb critical_region_fixup
++ cmpl $sysexit_scrit,%eax
++ jb 11f
++ cmpl $sysexit_ecrit,%eax
++ ja 11f
++ addl $OLDESP,%esp # Remove eflags...ebx from stack frame.
++11: push %esp
++ CFI_ADJUST_CFA_OFFSET 4
++ call evtchn_do_upcall
++ add $4,%esp
++ CFI_ADJUST_CFA_OFFSET -4
++ jmp ret_from_intr
++ CFI_ENDPROC
++
++# [How we do the fixup]. We want to merge the current stack frame with the
++# just-interrupted frame. How we do this depends on where in the critical
++# region the interrupted handler was executing, and so how many saved
++# registers are in each frame. We do this quickly using the lookup table
++# 'critical_fixup_table'. For each byte offset in the critical region, it
++# provides the number of bytes which have already been popped from the
++# interrupted stack frame.
++critical_region_fixup:
++ movzbl critical_fixup_table-scrit(%eax),%ecx # %eax contains num bytes popped
++ cmpb $0xff,%cl # 0xff => vcpu_info critical region
++ jne 15f
++ xorl %ecx,%ecx
++15: leal (%esp,%ecx),%esi # %esi points at end of src region
++ leal OLDESP(%esp),%edi # %edi points at end of dst region
++ shrl $2,%ecx # convert words to bytes
++ je 17f # skip loop if nothing to copy
++16: subl $4,%esi # pre-decrementing copy loop
++ subl $4,%edi
++ movl (%esi),%eax
++ movl %eax,(%edi)
++ loop 16b
++17: movl %edi,%esp # final %edi is top of merged stack
++ jmp 11b
++
++.section .rodata,"a"
++critical_fixup_table:
++ .byte 0xff,0xff,0xff # testb $0xff,(%esi) = __TEST_PENDING
++ .byte 0xff,0xff # jnz 14f
++ .byte 0x00 # pop %ebx
++ .byte 0x04 # pop %ecx
++ .byte 0x08 # pop %edx
++ .byte 0x0c # pop %esi
++ .byte 0x10 # pop %edi
++ .byte 0x14 # pop %ebp
++ .byte 0x18 # pop %eax
++ .byte 0x1c # pop %ds
++ .byte 0x20 # pop %es
++ .byte 0x24,0x24,0x24 # add $4,%esp
++ .byte 0x28 # iret
++ .byte 0xff,0xff,0xff,0xff # movb $1,1(%esi)
++ .byte 0x00,0x00 # jmp 11b
++.previous
++
++# Hypervisor uses this for application faults while it executes.
++# We get here for two reasons:
++# 1. Fault while reloading DS, ES, FS or GS
++# 2. Fault while executing IRET
++# Category 1 we fix up by reattempting the load, and zeroing the segment
++# register if the load fails.
++# Category 2 we fix up by jumping to do_iret_error. We cannot use the
++# normal Linux return path in this case because if we use the IRET hypercall
++# to pop the stack frame we end up in an infinite loop of failsafe callbacks.
++# We distinguish between categories by maintaining a status value in EAX.
++ENTRY(failsafe_callback)
++ pushl %eax
++ movl $1,%eax
++1: mov 4(%esp),%ds
++2: mov 8(%esp),%es
++3: mov 12(%esp),%fs
++4: mov 16(%esp),%gs
++ testl %eax,%eax
++ popl %eax
++ jz 5f
++ addl $16,%esp # EAX != 0 => Category 2 (Bad IRET)
++ jmp iret_exc
++5: addl $16,%esp # EAX == 0 => Category 1 (Bad segment)
++ RING0_INT_FRAME
++ pushl $0
++ SAVE_ALL
++ jmp ret_from_exception
++.section .fixup,"ax"; \
++6: xorl %eax,%eax; \
++ movl %eax,4(%esp); \
++ jmp 1b; \
++7: xorl %eax,%eax; \
++ movl %eax,8(%esp); \
++ jmp 2b; \
++8: xorl %eax,%eax; \
++ movl %eax,12(%esp); \
++ jmp 3b; \
++9: xorl %eax,%eax; \
++ movl %eax,16(%esp); \
++ jmp 4b; \
++.previous; \
++.section __ex_table,"a"; \
++ .align 4; \
++ .long 1b,6b; \
++ .long 2b,7b; \
++ .long 3b,8b; \
++ .long 4b,9b; \
++.previous
++#endif
++ CFI_ENDPROC
++
++ENTRY(coprocessor_error)
++ RING0_INT_FRAME
++ pushl $0
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_coprocessor_error
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++ENTRY(simd_coprocessor_error)
++ RING0_INT_FRAME
++ pushl $0
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_simd_coprocessor_error
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++ENTRY(device_not_available)
++ RING0_INT_FRAME
++ pushl $-1 # mark this as an int
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++#ifndef CONFIG_XEN
++ movl %cr0, %eax
++ testl $0x4, %eax # EM (math emulation bit)
++ je device_available_emulate
++ pushl $0 # temporary storage for ORIG_EIP
++ CFI_ADJUST_CFA_OFFSET 4
++ call math_emulate
++ addl $4, %esp
++ CFI_ADJUST_CFA_OFFSET -4
++ jmp ret_from_exception
++device_available_emulate:
++#endif
++ preempt_stop
++ call math_state_restore
++ jmp ret_from_exception
++ CFI_ENDPROC
++
++#ifndef CONFIG_XEN
++/*
++ * Debug traps and NMI can happen at the one SYSENTER instruction
++ * that sets up the real kernel stack. Check here, since we can't
++ * allow the wrong stack to be used.
++ *
++ * "SYSENTER_stack_esp0+12" is because the NMI/debug handler will have
++ * already pushed 3 words if it hits on the sysenter instruction:
++ * eflags, cs and eip.
++ *
++ * We just load the right stack, and push the three (known) values
++ * by hand onto the new stack - while updating the return eip past
++ * the instruction that would have done it for sysenter.
++ */
++#define FIX_STACK(offset, ok, label) \
++ cmpw $__KERNEL_CS,4(%esp); \
++ jne ok; \
++label: \
++ movl SYSENTER_stack_esp0+offset(%esp),%esp; \
++ pushfl; \
++ pushl $__KERNEL_CS; \
++ pushl $sysenter_past_esp
++#endif /* CONFIG_XEN */
++
++KPROBE_ENTRY(debug)
++ RING0_INT_FRAME
++#ifndef CONFIG_XEN
++ cmpl $sysenter_entry,(%esp)
++ jne debug_stack_correct
++ FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn)
++debug_stack_correct:
++#endif /* !CONFIG_XEN */
++ pushl $-1 # mark this as an int
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ xorl %edx,%edx # error code 0
++ movl %esp,%eax # pt_regs pointer
++ call do_debug
++ jmp ret_from_exception
++ CFI_ENDPROC
++ .previous .text
++#ifndef CONFIG_XEN
++/*
++ * NMI is doubly nasty. It can happen _while_ we're handling
++ * a debug fault, and the debug fault hasn't yet been able to
++ * clear up the stack. So we first check whether we got an
++ * NMI on the sysenter entry path, but after that we need to
++ * check whether we got an NMI on the debug path where the debug
++ * fault happened on the sysenter path.
++ */
++ENTRY(nmi)
++ RING0_INT_FRAME
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ movl %ss, %eax
++ cmpw $__ESPFIX_SS, %ax
++ popl %eax
++ CFI_ADJUST_CFA_OFFSET -4
++ je nmi_16bit_stack
++ cmpl $sysenter_entry,(%esp)
++ je nmi_stack_fixup
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ movl %esp,%eax
++ /* Do not access memory above the end of our stack page,
++ * it might not exist.
++ */
++ andl $(THREAD_SIZE-1),%eax
++ cmpl $(THREAD_SIZE-20),%eax
++ popl %eax
++ CFI_ADJUST_CFA_OFFSET -4
++ jae nmi_stack_correct
++ cmpl $sysenter_entry,12(%esp)
++ je nmi_debug_stack_check
++nmi_stack_correct:
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ xorl %edx,%edx # zero error code
++ movl %esp,%eax # pt_regs pointer
++ call do_nmi
++ jmp restore_nocheck_notrace
++ CFI_ENDPROC
++
++nmi_stack_fixup:
++ FIX_STACK(12,nmi_stack_correct, 1)
++ jmp nmi_stack_correct
++nmi_debug_stack_check:
++ cmpw $__KERNEL_CS,16(%esp)
++ jne nmi_stack_correct
++ cmpl $debug,(%esp)
++ jb nmi_stack_correct
++ cmpl $debug_esp_fix_insn,(%esp)
++ ja nmi_stack_correct
++ FIX_STACK(24,nmi_stack_correct, 1)
++ jmp nmi_stack_correct
++
++nmi_16bit_stack:
++ RING0_INT_FRAME
++ /* create the pointer to lss back */
++ pushl %ss
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl %esp
++ CFI_ADJUST_CFA_OFFSET 4
++ movzwl %sp, %esp
++ addw $4, (%esp)
++ /* copy the iret frame of 12 bytes */
++ .rept 3
++ pushl 16(%esp)
++ CFI_ADJUST_CFA_OFFSET 4
++ .endr
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ FIXUP_ESPFIX_STACK # %eax == %esp
++ CFI_ADJUST_CFA_OFFSET -20 # the frame has now moved
++ xorl %edx,%edx # zero error code
++ call do_nmi
++ RESTORE_REGS
++ lss 12+4(%esp), %esp # back to 16bit stack
++1: iret
++ CFI_ENDPROC
++.section __ex_table,"a"
++ .align 4
++ .long 1b,iret_exc
++.previous
++#else
++ENTRY(nmi)
++ RING0_INT_FRAME
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ xorl %edx,%edx # zero error code
++ movl %esp,%eax # pt_regs pointer
++ call do_nmi
++ orl $NMI_MASK, EFLAGS(%esp)
++ jmp restore_all
++ CFI_ENDPROC
++#endif
++
++KPROBE_ENTRY(int3)
++ RING0_INT_FRAME
++ pushl $-1 # mark this as an int
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ xorl %edx,%edx # zero error code
++ movl %esp,%eax # pt_regs pointer
++ call do_int3
++ jmp ret_from_exception
++ CFI_ENDPROC
++ .previous .text
++
++ENTRY(overflow)
++ RING0_INT_FRAME
++ pushl $0
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_overflow
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++ENTRY(bounds)
++ RING0_INT_FRAME
++ pushl $0
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_bounds
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++ENTRY(invalid_op)
++ RING0_INT_FRAME
++ pushl $0
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_invalid_op
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++ENTRY(coprocessor_segment_overrun)
++ RING0_INT_FRAME
++ pushl $0
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_coprocessor_segment_overrun
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++ENTRY(invalid_TSS)
++ RING0_EC_FRAME
++ pushl $do_invalid_TSS
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++ENTRY(segment_not_present)
++ RING0_EC_FRAME
++ pushl $do_segment_not_present
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++ENTRY(stack_segment)
++ RING0_EC_FRAME
++ pushl $do_stack_segment
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++KPROBE_ENTRY(general_protection)
++ RING0_EC_FRAME
++ pushl $do_general_protection
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++ .previous .text
++
++ENTRY(alignment_check)
++ RING0_EC_FRAME
++ pushl $do_alignment_check
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++KPROBE_ENTRY(page_fault)
++ RING0_EC_FRAME
++ pushl $do_page_fault
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++ .previous .text
++
++#ifdef CONFIG_X86_MCE
++ENTRY(machine_check)
++ RING0_INT_FRAME
++ pushl $0
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl machine_check_vector
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++#endif
++
++#ifndef CONFIG_XEN
++ENTRY(spurious_interrupt_bug)
++ RING0_INT_FRAME
++ pushl $0
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_spurious_interrupt_bug
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++#endif /* !CONFIG_XEN */
++
++#ifdef CONFIG_STACK_UNWIND
++ENTRY(arch_unwind_init_running)
++ CFI_STARTPROC
++ movl 4(%esp), %edx
++ movl (%esp), %ecx
++ leal 4(%esp), %eax
++ movl %ebx, EBX(%edx)
++ xorl %ebx, %ebx
++ movl %ebx, ECX(%edx)
++ movl %ebx, EDX(%edx)
++ movl %esi, ESI(%edx)
++ movl %edi, EDI(%edx)
++ movl %ebp, EBP(%edx)
++ movl %ebx, EAX(%edx)
++ movl $__USER_DS, DS(%edx)
++ movl $__USER_DS, ES(%edx)
++ movl %ebx, ORIG_EAX(%edx)
++ movl %ecx, EIP(%edx)
++ movl 12(%esp), %ecx
++ movl $__KERNEL_CS, CS(%edx)
++ movl %ebx, EFLAGS(%edx)
++ movl %eax, OLDESP(%edx)
++ movl 8(%esp), %eax
++ movl %ecx, 8(%esp)
++ movl EBX(%edx), %ebx
++ movl $__KERNEL_DS, OLDSS(%edx)
++ jmpl *%eax
++ CFI_ENDPROC
++ENDPROC(arch_unwind_init_running)
++#endif
++
++ENTRY(fixup_4gb_segment)
++ RING0_EC_FRAME
++ pushl $do_fixup_4gb_segment
++ CFI_ADJUST_CFA_OFFSET 4
++ jmp error_code
++ CFI_ENDPROC
++
++.section .rodata,"a"
++#include "syscall_table.S"
++
++syscall_table_size=(.-sys_call_table)
+Index: head-2008-11-25/arch/x86/kernel/fixup.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/fixup.c 2008-01-28 12:24:18.000000000 +0100
+@@ -0,0 +1,88 @@
++/******************************************************************************
++ * fixup.c
++ *
++ * Binary-rewriting of certain IA32 instructions, on notification by Xen.
++ * Used to avoid repeated slow emulation of common instructions used by the
++ * user-space TLS (Thread-Local Storage) libraries.
++ *
++ * **** NOTE ****
++ * Issues with the binary rewriting have caused it to be removed. Instead
++ * we rely on Xen's emulator to boot the kernel, and then print a banner
++ * message recommending that the user disables /lib/tls.
++ *
++ * Copyright (c) 2004, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ */
++
++#include <linux/init.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/kernel.h>
++#include <linux/delay.h>
++#include <linux/version.h>
++
++#define DP(_f, _args...) printk(KERN_ALERT " " _f "\n" , ## _args )
++
++fastcall void do_fixup_4gb_segment(struct pt_regs *regs, long error_code)
++{
++ static unsigned long printed = 0;
++ char info[100];
++ int i;
++
++ /* Ignore statically-linked init. */
++ if (current->tgid == 1)
++ return;
++
++ VOID(HYPERVISOR_vm_assist(VMASST_CMD_disable,
++ VMASST_TYPE_4gb_segments_notify));
++
++ if (test_and_set_bit(0, &printed))
++ return;
++
++ sprintf(info, "%s (pid=%d)", current->comm, current->tgid);
++
++ DP("");
++ DP("***************************************************************");
++ DP("***************************************************************");
++ DP("** WARNING: Currently emulating unsupported memory accesses **");
++ DP("** in /lib/tls glibc libraries. The emulation is **");
++ DP("** slow. To ensure full performance you should **");
++ DP("** install a 'xen-friendly' (nosegneg) version of **");
++ DP("** the library, or disable tls support by executing **");
++ DP("** the following as root: **");
++ DP("** mv /lib/tls /lib/tls.disabled **");
++ DP("** Offending process: %-38.38s **", info);
++ DP("***************************************************************");
++ DP("***************************************************************");
++ DP("");
++
++ for (i = 5; i > 0; i--) {
++ touch_softlockup_watchdog();
++ printk("Pausing... %d", i);
++ mdelay(1000);
++ printk("\b\b\b\b\b\b\b\b\b\b\b\b");
++ }
++
++ printk("Continuing...\n\n");
++}
++
++static int __init fixup_init(void)
++{
++ WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
++ VMASST_TYPE_4gb_segments_notify));
++ return 0;
++}
++__initcall(fixup_init);
+Index: head-2008-11-25/arch/x86/kernel/head_32-xen.S
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/head_32-xen.S 2007-06-12 13:12:48.000000000 +0200
+@@ -0,0 +1,207 @@
++
++
++.text
++#include <linux/elfnote.h>
++#include <linux/threads.h>
++#include <linux/linkage.h>
++#include <asm/segment.h>
++#include <asm/page.h>
++#include <asm/cache.h>
++#include <asm/thread_info.h>
++#include <asm/asm-offsets.h>
++#include <asm/dwarf2.h>
++#include <xen/interface/xen.h>
++#include <xen/interface/elfnote.h>
++
++/*
++ * References to members of the new_cpu_data structure.
++ */
++
++#define X86 new_cpu_data+CPUINFO_x86
++#define X86_VENDOR new_cpu_data+CPUINFO_x86_vendor
++#define X86_MODEL new_cpu_data+CPUINFO_x86_model
++#define X86_MASK new_cpu_data+CPUINFO_x86_mask
++#define X86_HARD_MATH new_cpu_data+CPUINFO_hard_math
++#define X86_CPUID new_cpu_data+CPUINFO_cpuid_level
++#define X86_CAPABILITY new_cpu_data+CPUINFO_x86_capability
++#define X86_VENDOR_ID new_cpu_data+CPUINFO_x86_vendor_id
++
++#define VIRT_ENTRY_OFFSET 0x0
++.org VIRT_ENTRY_OFFSET
++ENTRY(startup_32)
++ movl %esi,xen_start_info
++ cld
++
++ /* Set up the stack pointer */
++ movl $(init_thread_union+THREAD_SIZE),%esp
++
++ /* get vendor info */
++ xorl %eax,%eax # call CPUID with 0 -> return vendor ID
++ XEN_CPUID
++ movl %eax,X86_CPUID # save CPUID level
++ movl %ebx,X86_VENDOR_ID # lo 4 chars
++ movl %edx,X86_VENDOR_ID+4 # next 4 chars
++ movl %ecx,X86_VENDOR_ID+8 # last 4 chars
++
++ movl $1,%eax # Use the CPUID instruction to get CPU type
++ XEN_CPUID
++ movb %al,%cl # save reg for future use
++ andb $0x0f,%ah # mask processor family
++ movb %ah,X86
++ andb $0xf0,%al # mask model
++ shrb $4,%al
++ movb %al,X86_MODEL
++ andb $0x0f,%cl # mask mask revision
++ movb %cl,X86_MASK
++ movl %edx,X86_CAPABILITY
++
++ movb $1,X86_HARD_MATH
++
++ xorl %eax,%eax # Clear FS/GS and LDT
++ movl %eax,%fs
++ movl %eax,%gs
++ cld # gcc2 wants the direction flag cleared at all times
++
++ pushl %eax # fake return address
++ jmp start_kernel
++
++#define HYPERCALL_PAGE_OFFSET 0x1000
++.org HYPERCALL_PAGE_OFFSET
++ENTRY(hypercall_page)
++ CFI_STARTPROC
++.skip 0x1000
++ CFI_ENDPROC
++
++/*
++ * Real beginning of normal "text" segment
++ */
++ENTRY(stext)
++ENTRY(_stext)
++
++/*
++ * BSS section
++ */
++.section ".bss.page_aligned","w"
++ENTRY(empty_zero_page)
++ .fill 4096,1,0
++
++/*
++ * This starts the data section.
++ */
++.data
++
++/*
++ * The Global Descriptor Table contains 28 quadwords, per-CPU.
++ */
++ .align L1_CACHE_BYTES
++ENTRY(cpu_gdt_table)
++ .quad 0x0000000000000000 /* NULL descriptor */
++ .quad 0x0000000000000000 /* 0x0b reserved */
++ .quad 0x0000000000000000 /* 0x13 reserved */
++ .quad 0x0000000000000000 /* 0x1b reserved */
++ .quad 0x0000000000000000 /* 0x20 unused */
++ .quad 0x0000000000000000 /* 0x28 unused */
++ .quad 0x0000000000000000 /* 0x33 TLS entry 1 */
++ .quad 0x0000000000000000 /* 0x3b TLS entry 2 */
++ .quad 0x0000000000000000 /* 0x43 TLS entry 3 */
++ .quad 0x0000000000000000 /* 0x4b reserved */
++ .quad 0x0000000000000000 /* 0x53 reserved */
++ .quad 0x0000000000000000 /* 0x5b reserved */
++
++ .quad 0x00cf9a000000ffff /* 0x60 kernel 4GB code at 0x00000000 */
++ .quad 0x00cf92000000ffff /* 0x68 kernel 4GB data at 0x00000000 */
++ .quad 0x00cffa000000ffff /* 0x73 user 4GB code at 0x00000000 */
++ .quad 0x00cff2000000ffff /* 0x7b user 4GB data at 0x00000000 */
++
++ .quad 0x0000000000000000 /* 0x80 TSS descriptor */
++ .quad 0x0000000000000000 /* 0x88 LDT descriptor */
++
++ /*
++ * Segments used for calling PnP BIOS have byte granularity.
++ * They code segments and data segments have fixed 64k limits,
++ * the transfer segment sizes are set at run time.
++ */
++ .quad 0x0000000000000000 /* 0x90 32-bit code */
++ .quad 0x0000000000000000 /* 0x98 16-bit code */
++ .quad 0x0000000000000000 /* 0xa0 16-bit data */
++ .quad 0x0000000000000000 /* 0xa8 16-bit data */
++ .quad 0x0000000000000000 /* 0xb0 16-bit data */
++
++ /*
++ * The APM segments have byte granularity and their bases
++ * are set at run time. All have 64k limits.
++ */
++ .quad 0x0000000000000000 /* 0xb8 APM CS code */
++ .quad 0x0000000000000000 /* 0xc0 APM CS 16 code (16 bit) */
++ .quad 0x0000000000000000 /* 0xc8 APM DS data */
++
++ .quad 0x0000000000000000 /* 0xd0 - ESPFIX 16-bit SS */
++ .quad 0x0000000000000000 /* 0xd8 - unused */
++ .quad 0x0000000000000000 /* 0xe0 - unused */
++ .quad 0x0000000000000000 /* 0xe8 - unused */
++ .quad 0x0000000000000000 /* 0xf0 - unused */
++ .quad 0x0000000000000000 /* 0xf8 - GDT entry 31: double-fault TSS */
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++/*
++ * __xen_guest information
++ */
++.macro utoa value
++ .if (\value) < 0 || (\value) >= 0x10
++ utoa (((\value)>>4)&0x0fffffff)
++ .endif
++ .if ((\value) & 0xf) < 10
++ .byte '0' + ((\value) & 0xf)
++ .else
++ .byte 'A' + ((\value) & 0xf) - 10
++ .endif
++.endm
++
++.section __xen_guest
++ .ascii "GUEST_OS=linux,GUEST_VER=2.6"
++ .ascii ",XEN_VER=xen-3.0"
++ .ascii ",VIRT_BASE=0x"
++ utoa __PAGE_OFFSET
++ .ascii ",ELF_PADDR_OFFSET=0x"
++ utoa __PAGE_OFFSET
++ .ascii ",VIRT_ENTRY=0x"
++ utoa (__PAGE_OFFSET + __PHYSICAL_START + VIRT_ENTRY_OFFSET)
++ .ascii ",HYPERCALL_PAGE=0x"
++ utoa ((__PHYSICAL_START+HYPERCALL_PAGE_OFFSET)>>PAGE_SHIFT)
++ .ascii ",FEATURES=writable_page_tables"
++ .ascii "|writable_descriptor_tables"
++ .ascii "|auto_translated_physmap"
++ .ascii "|pae_pgdir_above_4gb"
++ .ascii "|supervisor_mode_kernel"
++#ifdef CONFIG_X86_PAE
++ .ascii ",PAE=yes[extended-cr3]"
++#else
++ .ascii ",PAE=no"
++#endif
++ .ascii ",LOADER=generic"
++ .byte 0
++#endif /* CONFIG_XEN_COMPAT <= 0x030002 */
++
++
++ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "linux")
++ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, "2.6")
++ ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0")
++ ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .long, __PAGE_OFFSET)
++#if CONFIG_XEN_COMPAT <= 0x030002
++ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long, __PAGE_OFFSET)
++#else
++ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long, 0)
++#endif
++ ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .long, startup_32)
++ ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .long, hypercall_page)
++ ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, .long, HYPERVISOR_VIRT_START)
++ ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
++#ifdef CONFIG_X86_PAE
++ ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "yes")
++ ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .quad, _PAGE_PRESENT,_PAGE_PRESENT)
++#else
++ ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "no")
++ ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .long, _PAGE_PRESENT,_PAGE_PRESENT)
++#endif
++ ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic")
++ ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long, 1)
+Index: head-2008-11-25/arch/x86/kernel/init_task-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/init_task-xen.c 2007-06-12 13:12:48.000000000 +0200
+@@ -0,0 +1,51 @@
++#include <linux/mm.h>
++#include <linux/module.h>
++#include <linux/sched.h>
++#include <linux/init.h>
++#include <linux/init_task.h>
++#include <linux/fs.h>
++#include <linux/mqueue.h>
++
++#include <asm/uaccess.h>
++#include <asm/pgtable.h>
++#include <asm/desc.h>
++
++static struct fs_struct init_fs = INIT_FS;
++static struct files_struct init_files = INIT_FILES;
++static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
++static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
++
++#define swapper_pg_dir ((pgd_t *)NULL)
++struct mm_struct init_mm = INIT_MM(init_mm);
++#undef swapper_pg_dir
++
++EXPORT_SYMBOL(init_mm);
++
++/*
++ * Initial thread structure.
++ *
++ * We need to make sure that this is THREAD_SIZE aligned due to the
++ * way process stacks are handled. This is done by having a special
++ * "init_task" linker map entry..
++ */
++union thread_union init_thread_union
++ __attribute__((__section__(".data.init_task"))) =
++ { INIT_THREAD_INFO(init_task) };
++
++/*
++ * Initial task structure.
++ *
++ * All other task structs will be allocated on slabs in fork.c
++ */
++struct task_struct init_task = INIT_TASK(init_task);
++
++EXPORT_SYMBOL(init_task);
++
++#ifndef CONFIG_X86_NO_TSS
++/*
++ * per-CPU TSS segments. Threads are completely 'soft' on Linux,
++ * no more per-task TSS's.
++ */
++DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS;
++#endif
++
+Index: head-2008-11-25/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/io_apic_32-xen.c 2008-11-25 12:22:34.000000000 +0100
+@@ -0,0 +1,2776 @@
++/*
++ * Intel IO-APIC support for multi-Pentium hosts.
++ *
++ * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar, Hajnalka Szabo
++ *
++ * Many thanks to Stig Venaas for trying out countless experimental
++ * patches and reporting/debugging problems patiently!
++ *
++ * (c) 1999, Multiple IO-APIC support, developed by
++ * Ken-ichi Yaku <yaku@css1.kbnes.nec.co.jp> and
++ * Hidemi Kishimoto <kisimoto@css1.kbnes.nec.co.jp>,
++ * further tested and cleaned up by Zach Brown <zab@redhat.com>
++ * and Ingo Molnar <mingo@redhat.com>
++ *
++ * Fixes
++ * Maciej W. Rozycki : Bits for genuine 82489DX APICs;
++ * thanks to Eric Gilmore
++ * and Rolf G. Tews
++ * for testing these extensively
++ * Paul Diefenbaugh : Added full ACPI support
++ */
++
++#include <linux/mm.h>
++#include <linux/interrupt.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/sched.h>
++#include <linux/smp_lock.h>
++#include <linux/mc146818rtc.h>
++#include <linux/compiler.h>
++#include <linux/acpi.h>
++#include <linux/module.h>
++#include <linux/sysdev.h>
++
++#include <asm/io.h>
++#include <asm/smp.h>
++#include <asm/desc.h>
++#include <asm/timer.h>
++#include <asm/i8259.h>
++#include <asm/nmi.h>
++
++#include <mach_apic.h>
++
++#include "io_ports.h"
++
++#ifdef CONFIG_XEN
++
++#include <xen/interface/xen.h>
++#include <xen/interface/physdev.h>
++#include <xen/evtchn.h>
++
++/* Fake i8259 */
++#define make_8259A_irq(_irq) (io_apic_irqs &= ~(1UL<<(_irq)))
++#define disable_8259A_irq(_irq) ((void)0)
++#define i8259A_irq_pending(_irq) (0)
++
++unsigned long io_apic_irqs;
++
++static inline unsigned int xen_io_apic_read(unsigned int apic, unsigned int reg)
++{
++ struct physdev_apic apic_op;
++ int ret;
++
++ apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.reg = reg;
++ ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
++ if (ret)
++ return ret;
++ return apic_op.value;
++}
++
++static inline void xen_io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
++{
++ struct physdev_apic apic_op;
++
++ apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.reg = reg;
++ apic_op.value = value;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op));
++}
++
++#define io_apic_read(a,r) xen_io_apic_read(a,r)
++#define io_apic_write(a,r,v) xen_io_apic_write(a,r,v)
++
++#endif /* CONFIG_XEN */
++
++int (*ioapic_renumber_irq)(int ioapic, int irq);
++atomic_t irq_mis_count;
++
++/* Where if anywhere is the i8259 connect in external int mode */
++static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
++
++static DEFINE_SPINLOCK(ioapic_lock);
++static DEFINE_SPINLOCK(vector_lock);
++
++int timer_over_8254 __initdata = 1;
++
++/*
++ * Is the SiS APIC rmw bug present ?
++ * -1 = don't know, 0 = no, 1 = yes
++ */
++int sis_apic_bug = -1;
++
++/*
++ * # of IRQ routing registers
++ */
++int nr_ioapic_registers[MAX_IO_APICS];
++
++int disable_timer_pin_1 __initdata;
++
++/*
++ * Rough estimation of how many shared IRQs there are, can
++ * be changed anytime.
++ */
++#define MAX_PLUS_SHARED_IRQS NR_IRQS
++#define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS)
++
++/*
++ * This is performance-critical, we want to do it O(1)
++ *
++ * the indexing order of this array favors 1:1 mappings
++ * between pins and IRQs.
++ */
++
++static struct irq_pin_list {
++ int apic, pin, next;
++} irq_2_pin[PIN_MAP_SIZE];
++
++int vector_irq[NR_VECTORS] __read_mostly = { [0 ... NR_VECTORS - 1] = -1};
++#ifdef CONFIG_PCI_MSI
++#define vector_to_irq(vector) \
++ (platform_legacy_irq(vector) ? vector : vector_irq[vector])
++#else
++#define vector_to_irq(vector) (vector)
++#endif
++
++/*
++ * The common case is 1:1 IRQ<->pin mappings. Sometimes there are
++ * shared ISA-space IRQs, so we have to support them. We are super
++ * fast in the common case, and fast for shared ISA-space IRQs.
++ */
++static void add_pin_to_irq(unsigned int irq, int apic, int pin)
++{
++ static int first_free_entry = NR_IRQS;
++ struct irq_pin_list *entry = irq_2_pin + irq;
++
++ while (entry->next)
++ entry = irq_2_pin + entry->next;
++
++ if (entry->pin != -1) {
++ entry->next = first_free_entry;
++ entry = irq_2_pin + entry->next;
++ if (++first_free_entry >= PIN_MAP_SIZE)
++ panic("io_apic.c: whoops");
++ }
++ entry->apic = apic;
++ entry->pin = pin;
++}
++
++#ifdef CONFIG_XEN
++#define clear_IO_APIC() ((void)0)
++#else
++/*
++ * Reroute an IRQ to a different pin.
++ */
++static void __init replace_pin_at_irq(unsigned int irq,
++ int oldapic, int oldpin,
++ int newapic, int newpin)
++{
++ struct irq_pin_list *entry = irq_2_pin + irq;
++
++ while (1) {
++ if (entry->apic == oldapic && entry->pin == oldpin) {
++ entry->apic = newapic;
++ entry->pin = newpin;
++ }
++ if (!entry->next)
++ break;
++ entry = irq_2_pin + entry->next;
++ }
++}
++
++static void __modify_IO_APIC_irq (unsigned int irq, unsigned long enable, unsigned long disable)
++{
++ struct irq_pin_list *entry = irq_2_pin + irq;
++ unsigned int pin, reg;
++
++ for (;;) {
++ pin = entry->pin;
++ if (pin == -1)
++ break;
++ reg = io_apic_read(entry->apic, 0x10 + pin*2);
++ reg &= ~disable;
++ reg |= enable;
++ io_apic_modify(entry->apic, 0x10 + pin*2, reg);
++ if (!entry->next)
++ break;
++ entry = irq_2_pin + entry->next;
++ }
++}
++
++/* mask = 1 */
++static void __mask_IO_APIC_irq (unsigned int irq)
++{
++ __modify_IO_APIC_irq(irq, 0x00010000, 0);
++}
++
++/* mask = 0 */
++static void __unmask_IO_APIC_irq (unsigned int irq)
++{
++ __modify_IO_APIC_irq(irq, 0, 0x00010000);
++}
++
++/* mask = 1, trigger = 0 */
++static void __mask_and_edge_IO_APIC_irq (unsigned int irq)
++{
++ __modify_IO_APIC_irq(irq, 0x00010000, 0x00008000);
++}
++
++/* mask = 0, trigger = 1 */
++static void __unmask_and_level_IO_APIC_irq (unsigned int irq)
++{
++ __modify_IO_APIC_irq(irq, 0x00008000, 0x00010000);
++}
++
++static void mask_IO_APIC_irq (unsigned int irq)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ __mask_IO_APIC_irq(irq);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++static void unmask_IO_APIC_irq (unsigned int irq)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ __unmask_IO_APIC_irq(irq);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
++{
++ struct IO_APIC_route_entry entry;
++ unsigned long flags;
++
++ /* Check delivery_mode to be sure we're not clearing an SMI pin */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ *(((int*)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
++ *(((int*)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ if (entry.delivery_mode == dest_SMI)
++ return;
++
++ /*
++ * Disable it in the IO-APIC irq-routing table:
++ */
++ memset(&entry, 0, sizeof(entry));
++ entry.mask = 1;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry) + 0));
++ io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry) + 1));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++static void clear_IO_APIC (void)
++{
++ int apic, pin;
++
++ for (apic = 0; apic < nr_ioapics; apic++)
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++)
++ clear_IO_APIC_pin(apic, pin);
++}
++
++#ifdef CONFIG_SMP
++static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t cpumask)
++{
++ unsigned long flags;
++ int pin;
++ struct irq_pin_list *entry = irq_2_pin + irq;
++ unsigned int apicid_value;
++ cpumask_t tmp;
++
++ cpus_and(tmp, cpumask, cpu_online_map);
++ if (cpus_empty(tmp))
++ tmp = TARGET_CPUS;
++
++ cpus_and(cpumask, tmp, CPU_MASK_ALL);
++
++ apicid_value = cpu_mask_to_apicid(cpumask);
++ /* Prepare to do the io_apic_write */
++ apicid_value = apicid_value << 24;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ for (;;) {
++ pin = entry->pin;
++ if (pin == -1)
++ break;
++ io_apic_write(entry->apic, 0x10 + 1 + pin*2, apicid_value);
++ if (!entry->next)
++ break;
++ entry = irq_2_pin + entry->next;
++ }
++ set_irq_info(irq, cpumask);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++#if defined(CONFIG_IRQBALANCE)
++# include <asm/processor.h> /* kernel_thread() */
++# include <linux/kernel_stat.h> /* kstat */
++# include <linux/slab.h> /* kmalloc() */
++# include <linux/timer.h> /* time_after() */
++
++#ifdef CONFIG_BALANCED_IRQ_DEBUG
++# define TDprintk(x...) do { printk("<%ld:%s:%d>: ", jiffies, __FILE__, __LINE__); printk(x); } while (0)
++# define Dprintk(x...) do { TDprintk(x); } while (0)
++# else
++# define TDprintk(x...)
++# define Dprintk(x...)
++# endif
++
++#define IRQBALANCE_CHECK_ARCH -999
++#define MAX_BALANCED_IRQ_INTERVAL (5*HZ)
++#define MIN_BALANCED_IRQ_INTERVAL (HZ/2)
++#define BALANCED_IRQ_MORE_DELTA (HZ/10)
++#define BALANCED_IRQ_LESS_DELTA (HZ)
++
++static int irqbalance_disabled __read_mostly = IRQBALANCE_CHECK_ARCH;
++static int physical_balance __read_mostly;
++static long balanced_irq_interval __read_mostly = MAX_BALANCED_IRQ_INTERVAL;
++
++static struct irq_cpu_info {
++ unsigned long * last_irq;
++ unsigned long * irq_delta;
++ unsigned long irq;
++} irq_cpu_data[NR_CPUS];
++
++#define CPU_IRQ(cpu) (irq_cpu_data[cpu].irq)
++#define LAST_CPU_IRQ(cpu,irq) (irq_cpu_data[cpu].last_irq[irq])
++#define IRQ_DELTA(cpu,irq) (irq_cpu_data[cpu].irq_delta[irq])
++
++#define IDLE_ENOUGH(cpu,now) \
++ (idle_cpu(cpu) && ((now) - per_cpu(irq_stat, (cpu)).idle_timestamp > 1))
++
++#define IRQ_ALLOWED(cpu, allowed_mask) cpu_isset(cpu, allowed_mask)
++
++#define CPU_TO_PACKAGEINDEX(i) (first_cpu(cpu_sibling_map[i]))
++
++static cpumask_t balance_irq_affinity[NR_IRQS] = {
++ [0 ... NR_IRQS-1] = CPU_MASK_ALL
++};
++
++void set_balance_irq_affinity(unsigned int irq, cpumask_t mask)
++{
++ balance_irq_affinity[irq] = mask;
++}
++
++static unsigned long move(int curr_cpu, cpumask_t allowed_mask,
++ unsigned long now, int direction)
++{
++ int search_idle = 1;
++ int cpu = curr_cpu;
++
++ goto inside;
++
++ do {
++ if (unlikely(cpu == curr_cpu))
++ search_idle = 0;
++inside:
++ if (direction == 1) {
++ cpu++;
++ if (cpu >= NR_CPUS)
++ cpu = 0;
++ } else {
++ cpu--;
++ if (cpu == -1)
++ cpu = NR_CPUS-1;
++ }
++ } while (!cpu_online(cpu) || !IRQ_ALLOWED(cpu,allowed_mask) ||
++ (search_idle && !IDLE_ENOUGH(cpu,now)));
++
++ return cpu;
++}
++
++static inline void balance_irq(int cpu, int irq)
++{
++ unsigned long now = jiffies;
++ cpumask_t allowed_mask;
++ unsigned int new_cpu;
++
++ if (irqbalance_disabled)
++ return;
++
++ cpus_and(allowed_mask, cpu_online_map, balance_irq_affinity[irq]);
++ new_cpu = move(cpu, allowed_mask, now, 1);
++ if (cpu != new_cpu) {
++ set_pending_irq(irq, cpumask_of_cpu(new_cpu));
++ }
++}
++
++static inline void rotate_irqs_among_cpus(unsigned long useful_load_threshold)
++{
++ int i, j;
++ Dprintk("Rotating IRQs among CPUs.\n");
++ for_each_online_cpu(i) {
++ for (j = 0; j < NR_IRQS; j++) {
++ if (!irq_desc[j].action)
++ continue;
++ /* Is it a significant load ? */
++ if (IRQ_DELTA(CPU_TO_PACKAGEINDEX(i),j) <
++ useful_load_threshold)
++ continue;
++ balance_irq(i, j);
++ }
++ }
++ balanced_irq_interval = max((long)MIN_BALANCED_IRQ_INTERVAL,
++ balanced_irq_interval - BALANCED_IRQ_LESS_DELTA);
++ return;
++}
++
++static void do_irq_balance(void)
++{
++ int i, j;
++ unsigned long max_cpu_irq = 0, min_cpu_irq = (~0);
++ unsigned long move_this_load = 0;
++ int max_loaded = 0, min_loaded = 0;
++ int load;
++ unsigned long useful_load_threshold = balanced_irq_interval + 10;
++ int selected_irq;
++ int tmp_loaded, first_attempt = 1;
++ unsigned long tmp_cpu_irq;
++ unsigned long imbalance = 0;
++ cpumask_t allowed_mask, target_cpu_mask, tmp;
++
++ for_each_possible_cpu(i) {
++ int package_index;
++ CPU_IRQ(i) = 0;
++ if (!cpu_online(i))
++ continue;
++ package_index = CPU_TO_PACKAGEINDEX(i);
++ for (j = 0; j < NR_IRQS; j++) {
++ unsigned long value_now, delta;
++ /* Is this an active IRQ? */
++ if (!irq_desc[j].action)
++ continue;
++ if ( package_index == i )
++ IRQ_DELTA(package_index,j) = 0;
++ /* Determine the total count per processor per IRQ */
++ value_now = (unsigned long) kstat_cpu(i).irqs[j];
++
++ /* Determine the activity per processor per IRQ */
++ delta = value_now - LAST_CPU_IRQ(i,j);
++
++ /* Update last_cpu_irq[][] for the next time */
++ LAST_CPU_IRQ(i,j) = value_now;
++
++ /* Ignore IRQs whose rate is less than the clock */
++ if (delta < useful_load_threshold)
++ continue;
++ /* update the load for the processor or package total */
++ IRQ_DELTA(package_index,j) += delta;
++
++ /* Keep track of the higher numbered sibling as well */
++ if (i != package_index)
++ CPU_IRQ(i) += delta;
++ /*
++ * We have sibling A and sibling B in the package
++ *
++ * cpu_irq[A] = load for cpu A + load for cpu B
++ * cpu_irq[B] = load for cpu B
++ */
++ CPU_IRQ(package_index) += delta;
++ }
++ }
++ /* Find the least loaded processor package */
++ for_each_online_cpu(i) {
++ if (i != CPU_TO_PACKAGEINDEX(i))
++ continue;
++ if (min_cpu_irq > CPU_IRQ(i)) {
++ min_cpu_irq = CPU_IRQ(i);
++ min_loaded = i;
++ }
++ }
++ max_cpu_irq = ULONG_MAX;
++
++tryanothercpu:
++ /* Look for heaviest loaded processor.
++ * We may come back to get the next heaviest loaded processor.
++ * Skip processors with trivial loads.
++ */
++ tmp_cpu_irq = 0;
++ tmp_loaded = -1;
++ for_each_online_cpu(i) {
++ if (i != CPU_TO_PACKAGEINDEX(i))
++ continue;
++ if (max_cpu_irq <= CPU_IRQ(i))
++ continue;
++ if (tmp_cpu_irq < CPU_IRQ(i)) {
++ tmp_cpu_irq = CPU_IRQ(i);
++ tmp_loaded = i;
++ }
++ }
++
++ if (tmp_loaded == -1) {
++ /* In the case of small number of heavy interrupt sources,
++ * loading some of the cpus too much. We use Ingo's original
++ * approach to rotate them around.
++ */
++ if (!first_attempt && imbalance >= useful_load_threshold) {
++ rotate_irqs_among_cpus(useful_load_threshold);
++ return;
++ }
++ goto not_worth_the_effort;
++ }
++
++ first_attempt = 0; /* heaviest search */
++ max_cpu_irq = tmp_cpu_irq; /* load */
++ max_loaded = tmp_loaded; /* processor */
++ imbalance = (max_cpu_irq - min_cpu_irq) / 2;
++
++ Dprintk("max_loaded cpu = %d\n", max_loaded);
++ Dprintk("min_loaded cpu = %d\n", min_loaded);
++ Dprintk("max_cpu_irq load = %ld\n", max_cpu_irq);
++ Dprintk("min_cpu_irq load = %ld\n", min_cpu_irq);
++ Dprintk("load imbalance = %lu\n", imbalance);
++
++ /* if imbalance is less than approx 10% of max load, then
++ * observe diminishing returns action. - quit
++ */
++ if (imbalance < (max_cpu_irq >> 3)) {
++ Dprintk("Imbalance too trivial\n");
++ goto not_worth_the_effort;
++ }
++
++tryanotherirq:
++ /* if we select an IRQ to move that can't go where we want, then
++ * see if there is another one to try.
++ */
++ move_this_load = 0;
++ selected_irq = -1;
++ for (j = 0; j < NR_IRQS; j++) {
++ /* Is this an active IRQ? */
++ if (!irq_desc[j].action)
++ continue;
++ if (imbalance <= IRQ_DELTA(max_loaded,j))
++ continue;
++ /* Try to find the IRQ that is closest to the imbalance
++ * without going over.
++ */
++ if (move_this_load < IRQ_DELTA(max_loaded,j)) {
++ move_this_load = IRQ_DELTA(max_loaded,j);
++ selected_irq = j;
++ }
++ }
++ if (selected_irq == -1) {
++ goto tryanothercpu;
++ }
++
++ imbalance = move_this_load;
++
++ /* For physical_balance case, we accumlated both load
++ * values in the one of the siblings cpu_irq[],
++ * to use the same code for physical and logical processors
++ * as much as possible.
++ *
++ * NOTE: the cpu_irq[] array holds the sum of the load for
++ * sibling A and sibling B in the slot for the lowest numbered
++ * sibling (A), _AND_ the load for sibling B in the slot for
++ * the higher numbered sibling.
++ *
++ * We seek the least loaded sibling by making the comparison
++ * (A+B)/2 vs B
++ */
++ load = CPU_IRQ(min_loaded) >> 1;
++ for_each_cpu_mask(j, cpu_sibling_map[min_loaded]) {
++ if (load > CPU_IRQ(j)) {
++ /* This won't change cpu_sibling_map[min_loaded] */
++ load = CPU_IRQ(j);
++ min_loaded = j;
++ }
++ }
++
++ cpus_and(allowed_mask,
++ cpu_online_map,
++ balance_irq_affinity[selected_irq]);
++ target_cpu_mask = cpumask_of_cpu(min_loaded);
++ cpus_and(tmp, target_cpu_mask, allowed_mask);
++
++ if (!cpus_empty(tmp)) {
++
++ Dprintk("irq = %d moved to cpu = %d\n",
++ selected_irq, min_loaded);
++ /* mark for change destination */
++ set_pending_irq(selected_irq, cpumask_of_cpu(min_loaded));
++
++ /* Since we made a change, come back sooner to
++ * check for more variation.
++ */
++ balanced_irq_interval = max((long)MIN_BALANCED_IRQ_INTERVAL,
++ balanced_irq_interval - BALANCED_IRQ_LESS_DELTA);
++ return;
++ }
++ goto tryanotherirq;
++
++not_worth_the_effort:
++ /*
++ * if we did not find an IRQ to move, then adjust the time interval
++ * upward
++ */
++ balanced_irq_interval = min((long)MAX_BALANCED_IRQ_INTERVAL,
++ balanced_irq_interval + BALANCED_IRQ_MORE_DELTA);
++ Dprintk("IRQ worth rotating not found\n");
++ return;
++}
++
++static int balanced_irq(void *unused)
++{
++ int i;
++ unsigned long prev_balance_time = jiffies;
++ long time_remaining = balanced_irq_interval;
++
++ daemonize("kirqd");
++
++ /* push everything to CPU 0 to give us a starting point. */
++ for (i = 0 ; i < NR_IRQS ; i++) {
++ irq_desc[i].pending_mask = cpumask_of_cpu(0);
++ set_pending_irq(i, cpumask_of_cpu(0));
++ }
++
++ for ( ; ; ) {
++ time_remaining = schedule_timeout_interruptible(time_remaining);
++ try_to_freeze();
++ if (time_after(jiffies,
++ prev_balance_time+balanced_irq_interval)) {
++ preempt_disable();
++ do_irq_balance();
++ prev_balance_time = jiffies;
++ time_remaining = balanced_irq_interval;
++ preempt_enable();
++ }
++ }
++ return 0;
++}
++
++static int __init balanced_irq_init(void)
++{
++ int i;
++ struct cpuinfo_x86 *c;
++ cpumask_t tmp;
++
++ cpus_shift_right(tmp, cpu_online_map, 2);
++ c = &boot_cpu_data;
++ /* When not overwritten by the command line ask subarchitecture. */
++ if (irqbalance_disabled == IRQBALANCE_CHECK_ARCH)
++ irqbalance_disabled = NO_BALANCE_IRQ;
++ if (irqbalance_disabled)
++ return 0;
++
++ /* disable irqbalance completely if there is only one processor online */
++ if (num_online_cpus() < 2) {
++ irqbalance_disabled = 1;
++ return 0;
++ }
++ /*
++ * Enable physical balance only if more than 1 physical processor
++ * is present
++ */
++ if (smp_num_siblings > 1 && !cpus_empty(tmp))
++ physical_balance = 1;
++
++ for_each_online_cpu(i) {
++ irq_cpu_data[i].irq_delta = kmalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
++ irq_cpu_data[i].last_irq = kmalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
++ if (irq_cpu_data[i].irq_delta == NULL || irq_cpu_data[i].last_irq == NULL) {
++ printk(KERN_ERR "balanced_irq_init: out of memory");
++ goto failed;
++ }
++ memset(irq_cpu_data[i].irq_delta,0,sizeof(unsigned long) * NR_IRQS);
++ memset(irq_cpu_data[i].last_irq,0,sizeof(unsigned long) * NR_IRQS);
++ }
++
++ printk(KERN_INFO "Starting balanced_irq\n");
++ if (kernel_thread(balanced_irq, NULL, CLONE_KERNEL) >= 0)
++ return 0;
++ else
++ printk(KERN_ERR "balanced_irq_init: failed to spawn balanced_irq");
++failed:
++ for_each_possible_cpu(i) {
++ kfree(irq_cpu_data[i].irq_delta);
++ irq_cpu_data[i].irq_delta = NULL;
++ kfree(irq_cpu_data[i].last_irq);
++ irq_cpu_data[i].last_irq = NULL;
++ }
++ return 0;
++}
++
++int __init irqbalance_disable(char *str)
++{
++ irqbalance_disabled = 1;
++ return 1;
++}
++
++__setup("noirqbalance", irqbalance_disable);
++
++late_initcall(balanced_irq_init);
++#endif /* CONFIG_IRQBALANCE */
++#endif /* CONFIG_SMP */
++#endif
++
++#ifndef CONFIG_SMP
++void fastcall send_IPI_self(int vector)
++{
++#ifndef CONFIG_XEN
++ unsigned int cfg;
++
++ /*
++ * Wait for idle.
++ */
++ apic_wait_icr_idle();
++ cfg = APIC_DM_FIXED | APIC_DEST_SELF | vector | APIC_DEST_LOGICAL;
++ /*
++ * Send the IPI. The write to APIC_ICR fires this off.
++ */
++ apic_write_around(APIC_ICR, cfg);
++#endif
++}
++#endif /* !CONFIG_SMP */
++
++
++/*
++ * support for broken MP BIOSs, enables hand-redirection of PIRQ0-7 to
++ * specific CPU-side IRQs.
++ */
++
++#define MAX_PIRQS 8
++static int pirq_entries [MAX_PIRQS];
++static int pirqs_enabled;
++int skip_ioapic_setup;
++
++static int __init ioapic_setup(char *str)
++{
++ skip_ioapic_setup = 1;
++ return 1;
++}
++
++__setup("noapic", ioapic_setup);
++
++static int __init ioapic_pirq_setup(char *str)
++{
++ int i, max;
++ int ints[MAX_PIRQS+1];
++
++ get_options(str, ARRAY_SIZE(ints), ints);
++
++ for (i = 0; i < MAX_PIRQS; i++)
++ pirq_entries[i] = -1;
++
++ pirqs_enabled = 1;
++ apic_printk(APIC_VERBOSE, KERN_INFO
++ "PIRQ redirection, working around broken MP-BIOS.\n");
++ max = MAX_PIRQS;
++ if (ints[0] < MAX_PIRQS)
++ max = ints[0];
++
++ for (i = 0; i < max; i++) {
++ apic_printk(APIC_VERBOSE, KERN_DEBUG
++ "... PIRQ%d -> IRQ %d\n", i, ints[i+1]);
++ /*
++ * PIRQs are mapped upside down, usually.
++ */
++ pirq_entries[MAX_PIRQS-i-1] = ints[i+1];
++ }
++ return 1;
++}
++
++__setup("pirq=", ioapic_pirq_setup);
++
++/*
++ * Find the IRQ entry number of a certain pin.
++ */
++static int find_irq_entry(int apic, int pin, int type)
++{
++ int i;
++
++ for (i = 0; i < mp_irq_entries; i++)
++ if (mp_irqs[i].mpc_irqtype == type &&
++ (mp_irqs[i].mpc_dstapic == mp_ioapics[apic].mpc_apicid ||
++ mp_irqs[i].mpc_dstapic == MP_APIC_ALL) &&
++ mp_irqs[i].mpc_dstirq == pin)
++ return i;
++
++ return -1;
++}
++
++/*
++ * Find the pin to which IRQ[irq] (ISA) is connected
++ */
++static int __init find_isa_irq_pin(int irq, int type)
++{
++ int i;
++
++ for (i = 0; i < mp_irq_entries; i++) {
++ int lbus = mp_irqs[i].mpc_srcbus;
++
++ if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_MCA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_NEC98
++ ) &&
++ (mp_irqs[i].mpc_irqtype == type) &&
++ (mp_irqs[i].mpc_srcbusirq == irq))
++
++ return mp_irqs[i].mpc_dstirq;
++ }
++ return -1;
++}
++
++static int __init find_isa_irq_apic(int irq, int type)
++{
++ int i;
++
++ for (i = 0; i < mp_irq_entries; i++) {
++ int lbus = mp_irqs[i].mpc_srcbus;
++
++ if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_MCA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_NEC98
++ ) &&
++ (mp_irqs[i].mpc_irqtype == type) &&
++ (mp_irqs[i].mpc_srcbusirq == irq))
++ break;
++ }
++ if (i < mp_irq_entries) {
++ int apic;
++ for(apic = 0; apic < nr_ioapics; apic++) {
++ if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic)
++ return apic;
++ }
++ }
++
++ return -1;
++}
++
++/*
++ * Find a specific PCI IRQ entry.
++ * Not an __init, possibly needed by modules
++ */
++static int pin_2_irq(int idx, int apic, int pin);
++
++int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
++{
++ int apic, i, best_guess = -1;
++
++ apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, "
++ "slot:%d, pin:%d.\n", bus, slot, pin);
++ if (mp_bus_id_to_pci_bus[bus] == -1) {
++ printk(KERN_WARNING "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
++ return -1;
++ }
++ for (i = 0; i < mp_irq_entries; i++) {
++ int lbus = mp_irqs[i].mpc_srcbus;
++
++ for (apic = 0; apic < nr_ioapics; apic++)
++ if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic ||
++ mp_irqs[i].mpc_dstapic == MP_APIC_ALL)
++ break;
++
++ if ((mp_bus_id_to_type[lbus] == MP_BUS_PCI) &&
++ !mp_irqs[i].mpc_irqtype &&
++ (bus == lbus) &&
++ (slot == ((mp_irqs[i].mpc_srcbusirq >> 2) & 0x1f))) {
++ int irq = pin_2_irq(i,apic,mp_irqs[i].mpc_dstirq);
++
++ if (!(apic || IO_APIC_IRQ(irq)))
++ continue;
++
++ if (pin == (mp_irqs[i].mpc_srcbusirq & 3))
++ return irq;
++ /*
++ * Use the first all-but-pin matching entry as a
++ * best-guess fuzzy result for broken mptables.
++ */
++ if (best_guess < 0)
++ best_guess = irq;
++ }
++ }
++ return best_guess;
++}
++EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
++
++/*
++ * This function currently is only a helper for the i386 smp boot process where
++ * we need to reprogram the ioredtbls to cater for the cpus which have come online
++ * so mask in all cases should simply be TARGET_CPUS
++ */
++#ifdef CONFIG_SMP
++#ifndef CONFIG_XEN
++void __init setup_ioapic_dest(void)
++{
++ int pin, ioapic, irq, irq_entry;
++
++ if (skip_ioapic_setup == 1)
++ return;
++
++ for (ioapic = 0; ioapic < nr_ioapics; ioapic++) {
++ for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) {
++ irq_entry = find_irq_entry(ioapic, pin, mp_INT);
++ if (irq_entry == -1)
++ continue;
++ irq = pin_2_irq(irq_entry, ioapic, pin);
++ set_ioapic_affinity_irq(irq, TARGET_CPUS);
++ }
++
++ }
++}
++#endif /* !CONFIG_XEN */
++#endif
++
++/*
++ * EISA Edge/Level control register, ELCR
++ */
++static int EISA_ELCR(unsigned int irq)
++{
++ if (irq < 16) {
++ unsigned int port = 0x4d0 + (irq >> 3);
++ return (inb(port) >> (irq & 7)) & 1;
++ }
++ apic_printk(APIC_VERBOSE, KERN_INFO
++ "Broken MPtable reports ISA irq %d\n", irq);
++ return 0;
++}
++
++/* EISA interrupts are always polarity zero and can be edge or level
++ * trigger depending on the ELCR value. If an interrupt is listed as
++ * EISA conforming in the MP table, that means its trigger type must
++ * be read in from the ELCR */
++
++#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mpc_srcbusirq))
++#define default_EISA_polarity(idx) (0)
++
++/* ISA interrupts are always polarity zero edge triggered,
++ * when listed as conforming in the MP table. */
++
++#define default_ISA_trigger(idx) (0)
++#define default_ISA_polarity(idx) (0)
++
++/* PCI interrupts are always polarity one level triggered,
++ * when listed as conforming in the MP table. */
++
++#define default_PCI_trigger(idx) (1)
++#define default_PCI_polarity(idx) (1)
++
++/* MCA interrupts are always polarity zero level triggered,
++ * when listed as conforming in the MP table. */
++
++#define default_MCA_trigger(idx) (1)
++#define default_MCA_polarity(idx) (0)
++
++/* NEC98 interrupts are always polarity zero edge triggered,
++ * when listed as conforming in the MP table. */
++
++#define default_NEC98_trigger(idx) (0)
++#define default_NEC98_polarity(idx) (0)
++
++static int __init MPBIOS_polarity(int idx)
++{
++ int bus = mp_irqs[idx].mpc_srcbus;
++ int polarity;
++
++ /*
++ * Determine IRQ line polarity (high active or low active):
++ */
++ switch (mp_irqs[idx].mpc_irqflag & 3)
++ {
++ case 0: /* conforms, ie. bus-type dependent polarity */
++ {
++ switch (mp_bus_id_to_type[bus])
++ {
++ case MP_BUS_ISA: /* ISA pin */
++ {
++ polarity = default_ISA_polarity(idx);
++ break;
++ }
++ case MP_BUS_EISA: /* EISA pin */
++ {
++ polarity = default_EISA_polarity(idx);
++ break;
++ }
++ case MP_BUS_PCI: /* PCI pin */
++ {
++ polarity = default_PCI_polarity(idx);
++ break;
++ }
++ case MP_BUS_MCA: /* MCA pin */
++ {
++ polarity = default_MCA_polarity(idx);
++ break;
++ }
++ case MP_BUS_NEC98: /* NEC 98 pin */
++ {
++ polarity = default_NEC98_polarity(idx);
++ break;
++ }
++ default:
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ polarity = 1;
++ break;
++ }
++ }
++ break;
++ }
++ case 1: /* high active */
++ {
++ polarity = 0;
++ break;
++ }
++ case 2: /* reserved */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ polarity = 1;
++ break;
++ }
++ case 3: /* low active */
++ {
++ polarity = 1;
++ break;
++ }
++ default: /* invalid */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ polarity = 1;
++ break;
++ }
++ }
++ return polarity;
++}
++
++static int MPBIOS_trigger(int idx)
++{
++ int bus = mp_irqs[idx].mpc_srcbus;
++ int trigger;
++
++ /*
++ * Determine IRQ trigger mode (edge or level sensitive):
++ */
++ switch ((mp_irqs[idx].mpc_irqflag>>2) & 3)
++ {
++ case 0: /* conforms, ie. bus-type dependent */
++ {
++ switch (mp_bus_id_to_type[bus])
++ {
++ case MP_BUS_ISA: /* ISA pin */
++ {
++ trigger = default_ISA_trigger(idx);
++ break;
++ }
++ case MP_BUS_EISA: /* EISA pin */
++ {
++ trigger = default_EISA_trigger(idx);
++ break;
++ }
++ case MP_BUS_PCI: /* PCI pin */
++ {
++ trigger = default_PCI_trigger(idx);
++ break;
++ }
++ case MP_BUS_MCA: /* MCA pin */
++ {
++ trigger = default_MCA_trigger(idx);
++ break;
++ }
++ case MP_BUS_NEC98: /* NEC 98 pin */
++ {
++ trigger = default_NEC98_trigger(idx);
++ break;
++ }
++ default:
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ trigger = 1;
++ break;
++ }
++ }
++ break;
++ }
++ case 1: /* edge */
++ {
++ trigger = 0;
++ break;
++ }
++ case 2: /* reserved */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ trigger = 1;
++ break;
++ }
++ case 3: /* level */
++ {
++ trigger = 1;
++ break;
++ }
++ default: /* invalid */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ trigger = 0;
++ break;
++ }
++ }
++ return trigger;
++}
++
++static inline int irq_polarity(int idx)
++{
++ return MPBIOS_polarity(idx);
++}
++
++static inline int irq_trigger(int idx)
++{
++ return MPBIOS_trigger(idx);
++}
++
++static int pin_2_irq(int idx, int apic, int pin)
++{
++ int irq, i;
++ int bus = mp_irqs[idx].mpc_srcbus;
++
++ /*
++ * Debugging check, we are in big trouble if this message pops up!
++ */
++ if (mp_irqs[idx].mpc_dstirq != pin)
++ printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n");
++
++ switch (mp_bus_id_to_type[bus])
++ {
++ case MP_BUS_ISA: /* ISA pin */
++ case MP_BUS_EISA:
++ case MP_BUS_MCA:
++ case MP_BUS_NEC98:
++ {
++ irq = mp_irqs[idx].mpc_srcbusirq;
++ break;
++ }
++ case MP_BUS_PCI: /* PCI pin */
++ {
++ /*
++ * PCI IRQs are mapped in order
++ */
++ i = irq = 0;
++ while (i < apic)
++ irq += nr_ioapic_registers[i++];
++ irq += pin;
++
++ /*
++ * For MPS mode, so far only needed by ES7000 platform
++ */
++ if (ioapic_renumber_irq)
++ irq = ioapic_renumber_irq(apic, irq);
++
++ break;
++ }
++ default:
++ {
++ printk(KERN_ERR "unknown bus type %d.\n",bus);
++ irq = 0;
++ break;
++ }
++ }
++
++ /*
++ * PCI IRQ command line redirection. Yes, limits are hardcoded.
++ */
++ if ((pin >= 16) && (pin <= 23)) {
++ if (pirq_entries[pin-16] != -1) {
++ if (!pirq_entries[pin-16]) {
++ apic_printk(APIC_VERBOSE, KERN_DEBUG
++ "disabling PIRQ%d\n", pin-16);
++ } else {
++ irq = pirq_entries[pin-16];
++ apic_printk(APIC_VERBOSE, KERN_DEBUG
++ "using PIRQ%d -> IRQ %d\n",
++ pin-16, irq);
++ }
++ }
++ }
++ return irq;
++}
++
++static inline int IO_APIC_irq_trigger(int irq)
++{
++ int apic, idx, pin;
++
++ for (apic = 0; apic < nr_ioapics; apic++) {
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
++ idx = find_irq_entry(apic,pin,mp_INT);
++ if ((idx != -1) && (irq == pin_2_irq(idx,apic,pin)))
++ return irq_trigger(idx);
++ }
++ }
++ /*
++ * nonexistent IRQs are edge default
++ */
++ return 0;
++}
++
++/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
++u8 irq_vector[NR_IRQ_VECTORS] __read_mostly; /* = { FIRST_DEVICE_VECTOR , 0 }; */
++
++int assign_irq_vector(int irq)
++{
++ unsigned long flags;
++ int vector;
++ struct physdev_irq irq_op;
++
++ BUG_ON(irq != AUTO_ASSIGN && (unsigned)irq >= NR_IRQ_VECTORS);
++
++ if (irq < PIRQ_BASE || irq - PIRQ_BASE > NR_PIRQS)
++ return -EINVAL;
++
++ spin_lock_irqsave(&vector_lock, flags);
++
++ if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0) {
++ spin_unlock_irqrestore(&vector_lock, flags);
++ return IO_APIC_VECTOR(irq);
++ }
++
++ irq_op.irq = irq;
++ if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op)) {
++ spin_unlock_irqrestore(&vector_lock, flags);
++ return -ENOSPC;
++ }
++
++ vector = irq_op.vector;
++ vector_irq[vector] = irq;
++ if (irq != AUTO_ASSIGN)
++ IO_APIC_VECTOR(irq) = vector;
++
++ spin_unlock_irqrestore(&vector_lock, flags);
++
++ return vector;
++}
++
++#ifndef CONFIG_XEN
++static struct hw_interrupt_type ioapic_level_type;
++static struct hw_interrupt_type ioapic_edge_type;
++
++#define IOAPIC_AUTO -1
++#define IOAPIC_EDGE 0
++#define IOAPIC_LEVEL 1
++
++static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
++{
++ unsigned idx;
++
++ idx = use_pci_vector() && !platform_legacy_irq(irq) ? vector : irq;
++
++ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
++ trigger == IOAPIC_LEVEL)
++ irq_desc[idx].chip = &ioapic_level_type;
++ else
++ irq_desc[idx].chip = &ioapic_edge_type;
++ set_intr_gate(vector, interrupt[idx]);
++}
++#else
++#define ioapic_register_intr(irq, vector, trigger) evtchn_register_pirq(irq)
++#endif
++
++static void __init setup_IO_APIC_irqs(void)
++{
++ struct IO_APIC_route_entry entry;
++ int apic, pin, idx, irq, first_notcon = 1, vector;
++ unsigned long flags;
++
++ apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
++
++ for (apic = 0; apic < nr_ioapics; apic++) {
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
++
++ /*
++ * add it to the IO-APIC irq-routing table:
++ */
++ memset(&entry,0,sizeof(entry));
++
++ entry.delivery_mode = INT_DELIVERY_MODE;
++ entry.dest_mode = INT_DEST_MODE;
++ entry.mask = 0; /* enable IRQ */
++ entry.dest.logical.logical_dest =
++ cpu_mask_to_apicid(TARGET_CPUS);
++
++ idx = find_irq_entry(apic,pin,mp_INT);
++ if (idx == -1) {
++ if (first_notcon) {
++ apic_printk(APIC_VERBOSE, KERN_DEBUG
++ " IO-APIC (apicid-pin) %d-%d",
++ mp_ioapics[apic].mpc_apicid,
++ pin);
++ first_notcon = 0;
++ } else
++ apic_printk(APIC_VERBOSE, ", %d-%d",
++ mp_ioapics[apic].mpc_apicid, pin);
++ continue;
++ }
++
++ entry.trigger = irq_trigger(idx);
++ entry.polarity = irq_polarity(idx);
++
++ if (irq_trigger(idx)) {
++ entry.trigger = 1;
++ entry.mask = 1;
++ }
++
++ irq = pin_2_irq(idx, apic, pin);
++ /*
++ * skip adding the timer int on secondary nodes, which causes
++ * a small but painful rift in the time-space continuum
++ */
++ if (multi_timer_check(apic, irq))
++ continue;
++ else
++ add_pin_to_irq(irq, apic, pin);
++
++ if (/*!apic &&*/ !IO_APIC_IRQ(irq))
++ continue;
++
++ if (IO_APIC_IRQ(irq)) {
++ vector = assign_irq_vector(irq);
++ entry.vector = vector;
++ ioapic_register_intr(irq, vector, IOAPIC_AUTO);
++
++ if (!apic && (irq < 16))
++ disable_8259A_irq(irq);
++ }
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1));
++ io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0));
++ set_native_irq_info(irq, TARGET_CPUS);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ }
++ }
++
++ if (!first_notcon)
++ apic_printk(APIC_VERBOSE, " not connected.\n");
++}
++
++/*
++ * Set up the 8259A-master output pin:
++ */
++#ifndef CONFIG_XEN
++static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, int vector)
++{
++ struct IO_APIC_route_entry entry;
++ unsigned long flags;
++
++ memset(&entry,0,sizeof(entry));
++
++ disable_8259A_irq(0);
++
++ /* mask LVT0 */
++ apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
++
++ /*
++ * We use logical delivery to get the timer IRQ
++ * to the first CPU.
++ */
++ entry.dest_mode = INT_DEST_MODE;
++ entry.mask = 0; /* unmask IRQ now */
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++ entry.delivery_mode = INT_DELIVERY_MODE;
++ entry.polarity = 0;
++ entry.trigger = 0;
++ entry.vector = vector;
++
++ /*
++ * The timer IRQ doesn't have to know that behind the
++ * scene we have a 8259A-master in AEOI mode ...
++ */
++ irq_desc[0].chip = &ioapic_edge_type;
++
++ /*
++ * Add it to the IO-APIC irq-routing table:
++ */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1));
++ io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ enable_8259A_irq(0);
++}
++
++static inline void UNEXPECTED_IO_APIC(void)
++{
++}
++
++void __init print_IO_APIC(void)
++{
++ int apic, i;
++ union IO_APIC_reg_00 reg_00;
++ union IO_APIC_reg_01 reg_01;
++ union IO_APIC_reg_02 reg_02;
++ union IO_APIC_reg_03 reg_03;
++ unsigned long flags;
++
++ if (apic_verbosity == APIC_QUIET)
++ return;
++
++ printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
++ for (i = 0; i < nr_ioapics; i++)
++ printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n",
++ mp_ioapics[i].mpc_apicid, nr_ioapic_registers[i]);
++
++ /*
++ * We are a bit conservative about what we expect. We have to
++ * know about every hardware change ASAP.
++ */
++ printk(KERN_INFO "testing the IO APIC.......................\n");
++
++ for (apic = 0; apic < nr_ioapics; apic++) {
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(apic, 0);
++ reg_01.raw = io_apic_read(apic, 1);
++ if (reg_01.bits.version >= 0x10)
++ reg_02.raw = io_apic_read(apic, 2);
++ if (reg_01.bits.version >= 0x20)
++ reg_03.raw = io_apic_read(apic, 3);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mpc_apicid);
++ printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw);
++ printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID);
++ printk(KERN_DEBUG "....... : Delivery Type: %X\n", reg_00.bits.delivery_type);
++ printk(KERN_DEBUG "....... : LTS : %X\n", reg_00.bits.LTS);
++ if (reg_00.bits.ID >= get_physical_broadcast())
++ UNEXPECTED_IO_APIC();
++ if (reg_00.bits.__reserved_1 || reg_00.bits.__reserved_2)
++ UNEXPECTED_IO_APIC();
++
++ printk(KERN_DEBUG ".... register #01: %08X\n", reg_01.raw);
++ printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries);
++ if ( (reg_01.bits.entries != 0x0f) && /* older (Neptune) boards */
++ (reg_01.bits.entries != 0x17) && /* typical ISA+PCI boards */
++ (reg_01.bits.entries != 0x1b) && /* Compaq Proliant boards */
++ (reg_01.bits.entries != 0x1f) && /* dual Xeon boards */
++ (reg_01.bits.entries != 0x22) && /* bigger Xeon boards */
++ (reg_01.bits.entries != 0x2E) &&
++ (reg_01.bits.entries != 0x3F)
++ )
++ UNEXPECTED_IO_APIC();
++
++ printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ);
++ printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version);
++ if ( (reg_01.bits.version != 0x01) && /* 82489DX IO-APICs */
++ (reg_01.bits.version != 0x10) && /* oldest IO-APICs */
++ (reg_01.bits.version != 0x11) && /* Pentium/Pro IO-APICs */
++ (reg_01.bits.version != 0x13) && /* Xeon IO-APICs */
++ (reg_01.bits.version != 0x20) /* Intel P64H (82806 AA) */
++ )
++ UNEXPECTED_IO_APIC();
++ if (reg_01.bits.__reserved_1 || reg_01.bits.__reserved_2)
++ UNEXPECTED_IO_APIC();
++
++ /*
++ * Some Intel chipsets with IO APIC VERSION of 0x1? don't have reg_02,
++ * but the value of reg_02 is read as the previous read register
++ * value, so ignore it if reg_02 == reg_01.
++ */
++ if (reg_01.bits.version >= 0x10 && reg_02.raw != reg_01.raw) {
++ printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw);
++ printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration);
++ if (reg_02.bits.__reserved_1 || reg_02.bits.__reserved_2)
++ UNEXPECTED_IO_APIC();
++ }
++
++ /*
++ * Some Intel chipsets with IO APIC VERSION of 0x2? don't have reg_02
++ * or reg_03, but the value of reg_0[23] is read as the previous read
++ * register value, so ignore it if reg_03 == reg_0[12].
++ */
++ if (reg_01.bits.version >= 0x20 && reg_03.raw != reg_02.raw &&
++ reg_03.raw != reg_01.raw) {
++ printk(KERN_DEBUG ".... register #03: %08X\n", reg_03.raw);
++ printk(KERN_DEBUG "....... : Boot DT : %X\n", reg_03.bits.boot_DT);
++ if (reg_03.bits.__reserved_1)
++ UNEXPECTED_IO_APIC();
++ }
++
++ printk(KERN_DEBUG ".... IRQ redirection table:\n");
++
++ printk(KERN_DEBUG " NR Log Phy Mask Trig IRR Pol"
++ " Stat Dest Deli Vect: \n");
++
++ for (i = 0; i <= reg_01.bits.entries; i++) {
++ struct IO_APIC_route_entry entry;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ *(((int *)&entry)+0) = io_apic_read(apic, 0x10+i*2);
++ *(((int *)&entry)+1) = io_apic_read(apic, 0x11+i*2);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ printk(KERN_DEBUG " %02x %03X %02X ",
++ i,
++ entry.dest.logical.logical_dest,
++ entry.dest.physical.physical_dest
++ );
++
++ printk("%1d %1d %1d %1d %1d %1d %1d %02X\n",
++ entry.mask,
++ entry.trigger,
++ entry.irr,
++ entry.polarity,
++ entry.delivery_status,
++ entry.dest_mode,
++ entry.delivery_mode,
++ entry.vector
++ );
++ }
++ }
++ if (use_pci_vector())
++ printk(KERN_INFO "Using vector-based indexing\n");
++ printk(KERN_DEBUG "IRQ to pin mappings:\n");
++ for (i = 0; i < NR_IRQS; i++) {
++ struct irq_pin_list *entry = irq_2_pin + i;
++ if (entry->pin < 0)
++ continue;
++ if (use_pci_vector() && !platform_legacy_irq(i))
++ printk(KERN_DEBUG "IRQ%d ", IO_APIC_VECTOR(i));
++ else
++ printk(KERN_DEBUG "IRQ%d ", i);
++ for (;;) {
++ printk("-> %d:%d", entry->apic, entry->pin);
++ if (!entry->next)
++ break;
++ entry = irq_2_pin + entry->next;
++ }
++ printk("\n");
++ }
++
++ printk(KERN_INFO ".................................... done.\n");
++
++ return;
++}
++
++static void print_APIC_bitfield (int base)
++{
++ unsigned int v;
++ int i, j;
++
++ if (apic_verbosity == APIC_QUIET)
++ return;
++
++ printk(KERN_DEBUG "0123456789abcdef0123456789abcdef\n" KERN_DEBUG);
++ for (i = 0; i < 8; i++) {
++ v = apic_read(base + i*0x10);
++ for (j = 0; j < 32; j++) {
++ if (v & (1<<j))
++ printk("1");
++ else
++ printk("0");
++ }
++ printk("\n");
++ }
++}
++
++void /*__init*/ print_local_APIC(void * dummy)
++{
++ unsigned int v, ver, maxlvt;
++
++ if (apic_verbosity == APIC_QUIET)
++ return;
++
++ printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
++ smp_processor_id(), hard_smp_processor_id());
++ v = apic_read(APIC_ID);
++ printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, GET_APIC_ID(v));
++ v = apic_read(APIC_LVR);
++ printk(KERN_INFO "... APIC VERSION: %08x\n", v);
++ ver = GET_APIC_VERSION(v);
++ maxlvt = get_maxlvt();
++
++ v = apic_read(APIC_TASKPRI);
++ printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
++
++ if (APIC_INTEGRATED(ver)) { /* !82489DX */
++ v = apic_read(APIC_ARBPRI);
++ printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
++ v & APIC_ARBPRI_MASK);
++ v = apic_read(APIC_PROCPRI);
++ printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
++ }
++
++ v = apic_read(APIC_EOI);
++ printk(KERN_DEBUG "... APIC EOI: %08x\n", v);
++ v = apic_read(APIC_RRR);
++ printk(KERN_DEBUG "... APIC RRR: %08x\n", v);
++ v = apic_read(APIC_LDR);
++ printk(KERN_DEBUG "... APIC LDR: %08x\n", v);
++ v = apic_read(APIC_DFR);
++ printk(KERN_DEBUG "... APIC DFR: %08x\n", v);
++ v = apic_read(APIC_SPIV);
++ printk(KERN_DEBUG "... APIC SPIV: %08x\n", v);
++
++ printk(KERN_DEBUG "... APIC ISR field:\n");
++ print_APIC_bitfield(APIC_ISR);
++ printk(KERN_DEBUG "... APIC TMR field:\n");
++ print_APIC_bitfield(APIC_TMR);
++ printk(KERN_DEBUG "... APIC IRR field:\n");
++ print_APIC_bitfield(APIC_IRR);
++
++ if (APIC_INTEGRATED(ver)) { /* !82489DX */
++ if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
++ apic_write(APIC_ESR, 0);
++ v = apic_read(APIC_ESR);
++ printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
++ }
++
++ v = apic_read(APIC_ICR);
++ printk(KERN_DEBUG "... APIC ICR: %08x\n", v);
++ v = apic_read(APIC_ICR2);
++ printk(KERN_DEBUG "... APIC ICR2: %08x\n", v);
++
++ v = apic_read(APIC_LVTT);
++ printk(KERN_DEBUG "... APIC LVTT: %08x\n", v);
++
++ if (maxlvt > 3) { /* PC is LVT#4. */
++ v = apic_read(APIC_LVTPC);
++ printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v);
++ }
++ v = apic_read(APIC_LVT0);
++ printk(KERN_DEBUG "... APIC LVT0: %08x\n", v);
++ v = apic_read(APIC_LVT1);
++ printk(KERN_DEBUG "... APIC LVT1: %08x\n", v);
++
++ if (maxlvt > 2) { /* ERR is LVT#3. */
++ v = apic_read(APIC_LVTERR);
++ printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v);
++ }
++
++ v = apic_read(APIC_TMICT);
++ printk(KERN_DEBUG "... APIC TMICT: %08x\n", v);
++ v = apic_read(APIC_TMCCT);
++ printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v);
++ v = apic_read(APIC_TDCR);
++ printk(KERN_DEBUG "... APIC TDCR: %08x\n", v);
++ printk("\n");
++}
++
++void print_all_local_APICs (void)
++{
++ on_each_cpu(print_local_APIC, NULL, 1, 1);
++}
++
++void /*__init*/ print_PIC(void)
++{
++ unsigned int v;
++ unsigned long flags;
++
++ if (apic_verbosity == APIC_QUIET)
++ return;
++
++ printk(KERN_DEBUG "\nprinting PIC contents\n");
++
++ spin_lock_irqsave(&i8259A_lock, flags);
++
++ v = inb(0xa1) << 8 | inb(0x21);
++ printk(KERN_DEBUG "... PIC IMR: %04x\n", v);
++
++ v = inb(0xa0) << 8 | inb(0x20);
++ printk(KERN_DEBUG "... PIC IRR: %04x\n", v);
++
++ outb(0x0b,0xa0);
++ outb(0x0b,0x20);
++ v = inb(0xa0) << 8 | inb(0x20);
++ outb(0x0a,0xa0);
++ outb(0x0a,0x20);
++
++ spin_unlock_irqrestore(&i8259A_lock, flags);
++
++ printk(KERN_DEBUG "... PIC ISR: %04x\n", v);
++
++ v = inb(0x4d1) << 8 | inb(0x4d0);
++ printk(KERN_DEBUG "... PIC ELCR: %04x\n", v);
++}
++#endif /* !CONFIG_XEN */
++
++static void __init enable_IO_APIC(void)
++{
++ union IO_APIC_reg_01 reg_01;
++ int i8259_apic, i8259_pin;
++ int i, apic;
++ unsigned long flags;
++
++ for (i = 0; i < PIN_MAP_SIZE; i++) {
++ irq_2_pin[i].pin = -1;
++ irq_2_pin[i].next = 0;
++ }
++ if (!pirqs_enabled)
++ for (i = 0; i < MAX_PIRQS; i++)
++ pirq_entries[i] = -1;
++
++ /*
++ * The number of IO-APIC IRQ registers (== #pins):
++ */
++ for (apic = 0; apic < nr_ioapics; apic++) {
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_01.raw = io_apic_read(apic, 1);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ nr_ioapic_registers[apic] = reg_01.bits.entries+1;
++ }
++ for(apic = 0; apic < nr_ioapics; apic++) {
++ int pin;
++ /* See if any of the pins is in ExtINT mode */
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
++ struct IO_APIC_route_entry entry;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ *(((int *)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
++ *(((int *)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++
++ /* If the interrupt line is enabled and in ExtInt mode
++ * I have found the pin where the i8259 is connected.
++ */
++ if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) {
++ ioapic_i8259.apic = apic;
++ ioapic_i8259.pin = pin;
++ goto found_i8259;
++ }
++ }
++ }
++ found_i8259:
++ /* Look to see what if the MP table has reported the ExtINT */
++ /* If we could not find the appropriate pin by looking at the ioapic
++ * the i8259 probably is not connected the ioapic but give the
++ * mptable a chance anyway.
++ */
++ i8259_pin = find_isa_irq_pin(0, mp_ExtINT);
++ i8259_apic = find_isa_irq_apic(0, mp_ExtINT);
++ /* Trust the MP table if nothing is setup in the hardware */
++ if ((ioapic_i8259.pin == -1) && (i8259_pin >= 0)) {
++ printk(KERN_WARNING "ExtINT not setup in hardware but reported by MP table\n");
++ ioapic_i8259.pin = i8259_pin;
++ ioapic_i8259.apic = i8259_apic;
++ }
++ /* Complain if the MP table and the hardware disagree */
++ if (((ioapic_i8259.apic != i8259_apic) || (ioapic_i8259.pin != i8259_pin)) &&
++ (i8259_pin >= 0) && (ioapic_i8259.pin >= 0))
++ {
++ printk(KERN_WARNING "ExtINT in hardware and MP table differ\n");
++ }
++
++ /*
++ * Do not trust the IO-APIC being empty at bootup
++ */
++ clear_IO_APIC();
++}
++
++/*
++ * Not an __init, needed by the reboot code
++ */
++void disable_IO_APIC(void)
++{
++ /*
++ * Clear the IO-APIC before rebooting:
++ */
++ clear_IO_APIC();
++
++#ifndef CONFIG_XEN
++ /*
++ * If the i8259 is routed through an IOAPIC
++ * Put that IOAPIC in virtual wire mode
++ * so legacy interrupts can be delivered.
++ */
++ if (ioapic_i8259.pin != -1) {
++ struct IO_APIC_route_entry entry;
++ unsigned long flags;
++
++ memset(&entry, 0, sizeof(entry));
++ entry.mask = 0; /* Enabled */
++ entry.trigger = 0; /* Edge */
++ entry.irr = 0;
++ entry.polarity = 0; /* High */
++ entry.delivery_status = 0;
++ entry.dest_mode = 0; /* Physical */
++ entry.delivery_mode = dest_ExtINT; /* ExtInt */
++ entry.vector = 0;
++ entry.dest.physical.physical_dest =
++ GET_APIC_ID(apic_read(APIC_ID));
++
++ /*
++ * Add it to the IO-APIC irq-routing table:
++ */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(ioapic_i8259.apic, 0x11+2*ioapic_i8259.pin,
++ *(((int *)&entry)+1));
++ io_apic_write(ioapic_i8259.apic, 0x10+2*ioapic_i8259.pin,
++ *(((int *)&entry)+0));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ }
++ disconnect_bsp_APIC(ioapic_i8259.pin != -1);
++#endif
++}
++
++/*
++ * function to set the IO-APIC physical IDs based on the
++ * values stored in the MPC table.
++ *
++ * by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999
++ */
++
++#if !defined(CONFIG_XEN) && !defined(CONFIG_X86_NUMAQ)
++static void __init setup_ioapic_ids_from_mpc(void)
++{
++ union IO_APIC_reg_00 reg_00;
++ physid_mask_t phys_id_present_map;
++ int apic;
++ int i;
++ unsigned char old_id;
++ unsigned long flags;
++
++ /*
++ * Don't check I/O APIC IDs for xAPIC systems. They have
++ * no meaning without the serial APIC bus.
++ */
++ if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
++ || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
++ return;
++ /*
++ * This is broken; anything with a real cpu count has to
++ * circumvent this idiocy regardless.
++ */
++ phys_id_present_map = ioapic_phys_id_map(phys_cpu_present_map);
++
++ /*
++ * Set the IOAPIC ID to the value stored in the MPC table.
++ */
++ for (apic = 0; apic < nr_ioapics; apic++) {
++
++ /* Read the register 0 value */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(apic, 0);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ old_id = mp_ioapics[apic].mpc_apicid;
++
++ if (mp_ioapics[apic].mpc_apicid >= get_physical_broadcast()) {
++ printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n",
++ apic, mp_ioapics[apic].mpc_apicid);
++ printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
++ reg_00.bits.ID);
++ mp_ioapics[apic].mpc_apicid = reg_00.bits.ID;
++ }
++
++ /*
++ * Sanity check, is the ID really free? Every APIC in a
++ * system must have a unique ID or we get lots of nice
++ * 'stuck on smp_invalidate_needed IPI wait' messages.
++ */
++ if (check_apicid_used(phys_id_present_map,
++ mp_ioapics[apic].mpc_apicid)) {
++ printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n",
++ apic, mp_ioapics[apic].mpc_apicid);
++ for (i = 0; i < get_physical_broadcast(); i++)
++ if (!physid_isset(i, phys_id_present_map))
++ break;
++ if (i >= get_physical_broadcast())
++ panic("Max APIC ID exceeded!\n");
++ printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
++ i);
++ physid_set(i, phys_id_present_map);
++ mp_ioapics[apic].mpc_apicid = i;
++ } else {
++ physid_mask_t tmp;
++ tmp = apicid_to_cpu_present(mp_ioapics[apic].mpc_apicid);
++ apic_printk(APIC_VERBOSE, "Setting %d in the "
++ "phys_id_present_map\n",
++ mp_ioapics[apic].mpc_apicid);
++ physids_or(phys_id_present_map, phys_id_present_map, tmp);
++ }
++
++
++ /*
++ * We need to adjust the IRQ routing table
++ * if the ID changed.
++ */
++ if (old_id != mp_ioapics[apic].mpc_apicid)
++ for (i = 0; i < mp_irq_entries; i++)
++ if (mp_irqs[i].mpc_dstapic == old_id)
++ mp_irqs[i].mpc_dstapic
++ = mp_ioapics[apic].mpc_apicid;
++
++ /*
++ * Read the right value from the MPC table and
++ * write it into the ID register.
++ */
++ apic_printk(APIC_VERBOSE, KERN_INFO
++ "...changing IO-APIC physical APIC ID to %d ...",
++ mp_ioapics[apic].mpc_apicid);
++
++ reg_00.bits.ID = mp_ioapics[apic].mpc_apicid;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0, reg_00.raw);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ /*
++ * Sanity check
++ */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(apic, 0);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ if (reg_00.bits.ID != mp_ioapics[apic].mpc_apicid)
++ printk("could not set ID!\n");
++ else
++ apic_printk(APIC_VERBOSE, " ok.\n");
++ }
++}
++#else
++static void __init setup_ioapic_ids_from_mpc(void) { }
++#endif
++
++#ifndef CONFIG_XEN
++/*
++ * There is a nasty bug in some older SMP boards, their mptable lies
++ * about the timer IRQ. We do the following to work around the situation:
++ *
++ * - timer IRQ defaults to IO-APIC IRQ
++ * - if this function detects that timer IRQs are defunct, then we fall
++ * back to ISA timer IRQs
++ */
++static int __init timer_irq_works(void)
++{
++ unsigned long t1 = jiffies;
++
++ local_irq_enable();
++ /* Let ten ticks pass... */
++ mdelay((10 * 1000) / HZ);
++
++ /*
++ * Expect a few ticks at least, to be sure some possible
++ * glue logic does not lock up after one or two first
++ * ticks in a non-ExtINT mode. Also the local APIC
++ * might have cached one ExtINT interrupt. Finally, at
++ * least one tick may be lost due to delays.
++ */
++ if (jiffies - t1 > 4)
++ return 1;
++
++ return 0;
++}
++
++/*
++ * In the SMP+IOAPIC case it might happen that there are an unspecified
++ * number of pending IRQ events unhandled. These cases are very rare,
++ * so we 'resend' these IRQs via IPIs, to the same CPU. It's much
++ * better to do it this way as thus we do not have to be aware of
++ * 'pending' interrupts in the IRQ path, except at this point.
++ */
++/*
++ * Edge triggered needs to resend any interrupt
++ * that was delayed but this is now handled in the device
++ * independent code.
++ */
++
++/*
++ * Starting up a edge-triggered IO-APIC interrupt is
++ * nasty - we need to make sure that we get the edge.
++ * If it is already asserted for some reason, we need
++ * return 1 to indicate that is was pending.
++ *
++ * This is not complete - we should be able to fake
++ * an edge even if it isn't on the 8259A...
++ */
++static unsigned int startup_edge_ioapic_irq(unsigned int irq)
++{
++ int was_pending = 0;
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ if (irq < 16) {
++ disable_8259A_irq(irq);
++ if (i8259A_irq_pending(irq))
++ was_pending = 1;
++ }
++ __unmask_IO_APIC_irq(irq);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return was_pending;
++}
++
++/*
++ * Once we have recorded IRQ_PENDING already, we can mask the
++ * interrupt for real. This prevents IRQ storms from unhandled
++ * devices.
++ */
++static void ack_edge_ioapic_irq(unsigned int irq)
++{
++ move_irq(irq);
++ if ((irq_desc[irq].status & (IRQ_PENDING | IRQ_DISABLED))
++ == (IRQ_PENDING | IRQ_DISABLED))
++ mask_IO_APIC_irq(irq);
++ ack_APIC_irq();
++}
++
++/*
++ * Level triggered interrupts can just be masked,
++ * and shutting down and starting up the interrupt
++ * is the same as enabling and disabling them -- except
++ * with a startup need to return a "was pending" value.
++ *
++ * Level triggered interrupts are special because we
++ * do not touch any IO-APIC register while handling
++ * them. We ack the APIC in the end-IRQ handler, not
++ * in the start-IRQ-handler. Protection against reentrance
++ * from the same interrupt is still provided, both by the
++ * generic IRQ layer and by the fact that an unacked local
++ * APIC does not accept IRQs.
++ */
++static unsigned int startup_level_ioapic_irq (unsigned int irq)
++{
++ unmask_IO_APIC_irq(irq);
++
++ return 0; /* don't check for pending */
++}
++
++static void end_level_ioapic_irq (unsigned int irq)
++{
++ unsigned long v;
++ int i;
++
++ move_irq(irq);
++/*
++ * It appears there is an erratum which affects at least version 0x11
++ * of I/O APIC (that's the 82093AA and cores integrated into various
++ * chipsets). Under certain conditions a level-triggered interrupt is
++ * erroneously delivered as edge-triggered one but the respective IRR
++ * bit gets set nevertheless. As a result the I/O unit expects an EOI
++ * message but it will never arrive and further interrupts are blocked
++ * from the source. The exact reason is so far unknown, but the
++ * phenomenon was observed when two consecutive interrupt requests
++ * from a given source get delivered to the same CPU and the source is
++ * temporarily disabled in between.
++ *
++ * A workaround is to simulate an EOI message manually. We achieve it
++ * by setting the trigger mode to edge and then to level when the edge
++ * trigger mode gets detected in the TMR of a local APIC for a
++ * level-triggered interrupt. We mask the source for the time of the
++ * operation to prevent an edge-triggered interrupt escaping meanwhile.
++ * The idea is from Manfred Spraul. --macro
++ */
++ i = IO_APIC_VECTOR(irq);
++
++ v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1));
++
++ ack_APIC_irq();
++
++ if (!(v & (1 << (i & 0x1f)))) {
++ atomic_inc(&irq_mis_count);
++ spin_lock(&ioapic_lock);
++ __mask_and_edge_IO_APIC_irq(irq);
++ __unmask_and_level_IO_APIC_irq(irq);
++ spin_unlock(&ioapic_lock);
++ }
++}
++
++#ifdef CONFIG_PCI_MSI
++static unsigned int startup_edge_ioapic_vector(unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ return startup_edge_ioapic_irq(irq);
++}
++
++static void ack_edge_ioapic_vector(unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ move_native_irq(vector);
++ ack_edge_ioapic_irq(irq);
++}
++
++static unsigned int startup_level_ioapic_vector (unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ return startup_level_ioapic_irq (irq);
++}
++
++static void end_level_ioapic_vector (unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ move_native_irq(vector);
++ end_level_ioapic_irq(irq);
++}
++
++static void mask_IO_APIC_vector (unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ mask_IO_APIC_irq(irq);
++}
++
++static void unmask_IO_APIC_vector (unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ unmask_IO_APIC_irq(irq);
++}
++
++#ifdef CONFIG_SMP
++static void set_ioapic_affinity_vector (unsigned int vector,
++ cpumask_t cpu_mask)
++{
++ int irq = vector_to_irq(vector);
++
++ set_native_irq_info(vector, cpu_mask);
++ set_ioapic_affinity_irq(irq, cpu_mask);
++}
++#endif
++#endif
++
++static int ioapic_retrigger(unsigned int irq)
++{
++ send_IPI_self(IO_APIC_VECTOR(irq));
++
++ return 1;
++}
++
++/*
++ * Level and edge triggered IO-APIC interrupts need different handling,
++ * so we use two separate IRQ descriptors. Edge triggered IRQs can be
++ * handled with the level-triggered descriptor, but that one has slightly
++ * more overhead. Level-triggered interrupts cannot be handled with the
++ * edge-triggered handler, without risking IRQ storms and other ugly
++ * races.
++ */
++static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
++ .typename = "IO-APIC-edge",
++ .startup = startup_edge_ioapic,
++ .shutdown = shutdown_edge_ioapic,
++ .enable = enable_edge_ioapic,
++ .disable = disable_edge_ioapic,
++ .ack = ack_edge_ioapic,
++ .end = end_edge_ioapic,
++#ifdef CONFIG_SMP
++ .set_affinity = set_ioapic_affinity,
++#endif
++ .retrigger = ioapic_retrigger,
++};
++
++static struct hw_interrupt_type ioapic_level_type __read_mostly = {
++ .typename = "IO-APIC-level",
++ .startup = startup_level_ioapic,
++ .shutdown = shutdown_level_ioapic,
++ .enable = enable_level_ioapic,
++ .disable = disable_level_ioapic,
++ .ack = mask_and_ack_level_ioapic,
++ .end = end_level_ioapic,
++#ifdef CONFIG_SMP
++ .set_affinity = set_ioapic_affinity,
++#endif
++ .retrigger = ioapic_retrigger,
++};
++#endif /* !CONFIG_XEN */
++
++static inline void init_IO_APIC_traps(void)
++{
++ int irq;
++
++ /*
++ * NOTE! The local APIC isn't very good at handling
++ * multiple interrupts at the same interrupt level.
++ * As the interrupt level is determined by taking the
++ * vector number and shifting that right by 4, we
++ * want to spread these out a bit so that they don't
++ * all fall in the same interrupt level.
++ *
++ * Also, we've got to be careful not to trash gate
++ * 0x80, because int 0x80 is hm, kind of importantish. ;)
++ */
++ for (irq = 0; irq < NR_IRQS ; irq++) {
++ int tmp = irq;
++ if (use_pci_vector()) {
++ if (!platform_legacy_irq(tmp))
++ if ((tmp = vector_to_irq(tmp)) == -1)
++ continue;
++ }
++ if (IO_APIC_IRQ(tmp) && !IO_APIC_VECTOR(tmp)) {
++ /*
++ * Hmm.. We don't have an entry for this,
++ * so default to an old-fashioned 8259
++ * interrupt if we can..
++ */
++ if (irq < 16)
++ make_8259A_irq(irq);
++#ifndef CONFIG_XEN
++ else
++ /* Strange. Oh, well.. */
++ irq_desc[irq].chip = &no_irq_type;
++#endif
++ }
++ }
++}
++
++#ifndef CONFIG_XEN
++static void enable_lapic_irq (unsigned int irq)
++{
++ unsigned long v;
++
++ v = apic_read(APIC_LVT0);
++ apic_write_around(APIC_LVT0, v & ~APIC_LVT_MASKED);
++}
++
++static void disable_lapic_irq (unsigned int irq)
++{
++ unsigned long v;
++
++ v = apic_read(APIC_LVT0);
++ apic_write_around(APIC_LVT0, v | APIC_LVT_MASKED);
++}
++
++static void ack_lapic_irq (unsigned int irq)
++{
++ ack_APIC_irq();
++}
++
++static void end_lapic_irq (unsigned int i) { /* nothing */ }
++
++static struct hw_interrupt_type lapic_irq_type __read_mostly = {
++ .typename = "local-APIC-edge",
++ .startup = NULL, /* startup_irq() not used for IRQ0 */
++ .shutdown = NULL, /* shutdown_irq() not used for IRQ0 */
++ .enable = enable_lapic_irq,
++ .disable = disable_lapic_irq,
++ .ack = ack_lapic_irq,
++ .end = end_lapic_irq
++};
++
++static void setup_nmi (void)
++{
++ /*
++ * Dirty trick to enable the NMI watchdog ...
++ * We put the 8259A master into AEOI mode and
++ * unmask on all local APICs LVT0 as NMI.
++ *
++ * The idea to use the 8259A in AEOI mode ('8259A Virtual Wire')
++ * is from Maciej W. Rozycki - so we do not have to EOI from
++ * the NMI handler or the timer interrupt.
++ */
++ apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ...");
++
++ on_each_cpu(enable_NMI_through_LVT0, NULL, 1, 1);
++
++ apic_printk(APIC_VERBOSE, " done.\n");
++}
++
++/*
++ * This looks a bit hackish but it's about the only one way of sending
++ * a few INTA cycles to 8259As and any associated glue logic. ICR does
++ * not support the ExtINT mode, unfortunately. We need to send these
++ * cycles as some i82489DX-based boards have glue logic that keeps the
++ * 8259A interrupt line asserted until INTA. --macro
++ */
++static inline void unlock_ExtINT_logic(void)
++{
++ int apic, pin, i;
++ struct IO_APIC_route_entry entry0, entry1;
++ unsigned char save_control, save_freq_select;
++ unsigned long flags;
++
++ pin = find_isa_irq_pin(8, mp_INT);
++ apic = find_isa_irq_apic(8, mp_INT);
++ if (pin == -1)
++ return;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ *(((int *)&entry0) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
++ *(((int *)&entry0) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ clear_IO_APIC_pin(apic, pin);
++
++ memset(&entry1, 0, sizeof(entry1));
++
++ entry1.dest_mode = 0; /* physical delivery */
++ entry1.mask = 0; /* unmask IRQ now */
++ entry1.dest.physical.physical_dest = hard_smp_processor_id();
++ entry1.delivery_mode = dest_ExtINT;
++ entry1.polarity = entry0.polarity;
++ entry1.trigger = 0;
++ entry1.vector = 0;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry1) + 1));
++ io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry1) + 0));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ save_control = CMOS_READ(RTC_CONTROL);
++ save_freq_select = CMOS_READ(RTC_FREQ_SELECT);
++ CMOS_WRITE((save_freq_select & ~RTC_RATE_SELECT) | 0x6,
++ RTC_FREQ_SELECT);
++ CMOS_WRITE(save_control | RTC_PIE, RTC_CONTROL);
++
++ i = 100;
++ while (i-- > 0) {
++ mdelay(10);
++ if ((CMOS_READ(RTC_INTR_FLAGS) & RTC_PF) == RTC_PF)
++ i -= 10;
++ }
++
++ CMOS_WRITE(save_control, RTC_CONTROL);
++ CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
++ clear_IO_APIC_pin(apic, pin);
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry0) + 1));
++ io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry0) + 0));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++int timer_uses_ioapic_pin_0;
++
++/*
++ * This code may look a bit paranoid, but it's supposed to cooperate with
++ * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ
++ * is so screwy. Thanks to Brian Perkins for testing/hacking this beast
++ * fanatically on his truly buggy board.
++ */
++static inline void check_timer(void)
++{
++ int apic1, pin1, apic2, pin2;
++ int vector;
++
++ /*
++ * get/set the timer IRQ vector:
++ */
++ disable_8259A_irq(0);
++ vector = assign_irq_vector(0);
++ set_intr_gate(vector, interrupt[0]);
++
++ /*
++ * Subtle, code in do_timer_interrupt() expects an AEOI
++ * mode for the 8259A whenever interrupts are routed
++ * through I/O APICs. Also IRQ0 has to be enabled in
++ * the 8259A which implies the virtual wire has to be
++ * disabled in the local APIC.
++ */
++ apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
++ init_8259A(1);
++ timer_ack = 1;
++ if (timer_over_8254 > 0)
++ enable_8259A_irq(0);
++
++ pin1 = find_isa_irq_pin(0, mp_INT);
++ apic1 = find_isa_irq_apic(0, mp_INT);
++ pin2 = ioapic_i8259.pin;
++ apic2 = ioapic_i8259.apic;
++
++ if (pin1 == 0)
++ timer_uses_ioapic_pin_0 = 1;
++
++ printk(KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
++ vector, apic1, pin1, apic2, pin2);
++
++ if (pin1 != -1) {
++ /*
++ * Ok, does IRQ0 through the IOAPIC work?
++ */
++ unmask_IO_APIC_irq(0);
++ if (timer_irq_works()) {
++ if (nmi_watchdog == NMI_IO_APIC) {
++ disable_8259A_irq(0);
++ setup_nmi();
++ enable_8259A_irq(0);
++ }
++ if (disable_timer_pin_1 > 0)
++ clear_IO_APIC_pin(0, pin1);
++ return;
++ }
++ clear_IO_APIC_pin(apic1, pin1);
++ printk(KERN_ERR "..MP-BIOS bug: 8254 timer not connected to "
++ "IO-APIC\n");
++ }
++
++ printk(KERN_INFO "...trying to set up timer (IRQ0) through the 8259A ... ");
++ if (pin2 != -1) {
++ printk("\n..... (found pin %d) ...", pin2);
++ /*
++ * legacy devices should be connected to IO APIC #0
++ */
++ setup_ExtINT_IRQ0_pin(apic2, pin2, vector);
++ if (timer_irq_works()) {
++ printk("works.\n");
++ if (pin1 != -1)
++ replace_pin_at_irq(0, apic1, pin1, apic2, pin2);
++ else
++ add_pin_to_irq(0, apic2, pin2);
++ if (nmi_watchdog == NMI_IO_APIC) {
++ setup_nmi();
++ }
++ return;
++ }
++ /*
++ * Cleanup, just in case ...
++ */
++ clear_IO_APIC_pin(apic2, pin2);
++ }
++ printk(" failed.\n");
++
++ if (nmi_watchdog == NMI_IO_APIC) {
++ printk(KERN_WARNING "timer doesn't work through the IO-APIC - disabling NMI Watchdog!\n");
++ nmi_watchdog = 0;
++ }
++
++ printk(KERN_INFO "...trying to set up timer as Virtual Wire IRQ...");
++
++ disable_8259A_irq(0);
++ irq_desc[0].chip = &lapic_irq_type;
++ apic_write_around(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
++ enable_8259A_irq(0);
++
++ if (timer_irq_works()) {
++ printk(" works.\n");
++ return;
++ }
++ apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
++ printk(" failed.\n");
++
++ printk(KERN_INFO "...trying to set up timer as ExtINT IRQ...");
++
++ timer_ack = 0;
++ init_8259A(0);
++ make_8259A_irq(0);
++ apic_write_around(APIC_LVT0, APIC_DM_EXTINT);
++
++ unlock_ExtINT_logic();
++
++ if (timer_irq_works()) {
++ printk(" works.\n");
++ return;
++ }
++ printk(" failed :(.\n");
++ panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a "
++ "report. Then try booting with the 'noapic' option");
++}
++#else
++int timer_uses_ioapic_pin_0 = 0;
++#define check_timer() ((void)0)
++#endif
++
++/*
++ *
++ * IRQ's that are handled by the PIC in the MPS IOAPIC case.
++ * - IRQ2 is the cascade IRQ, and cannot be a io-apic IRQ.
++ * Linux doesn't really care, as it's not actually used
++ * for any interrupt handling anyway.
++ */
++#define PIC_IRQS (1 << PIC_CASCADE_IR)
++
++void __init setup_IO_APIC(void)
++{
++ enable_IO_APIC();
++
++ if (acpi_ioapic)
++ io_apic_irqs = ~0; /* all IRQs go through IOAPIC */
++ else
++ io_apic_irqs = ~PIC_IRQS;
++
++ printk("ENABLING IO-APIC IRQs\n");
++
++ /*
++ * Set up IO-APIC IRQ routing.
++ */
++ if (!acpi_ioapic)
++ setup_ioapic_ids_from_mpc();
++#ifndef CONFIG_XEN
++ sync_Arb_IDs();
++#endif
++ setup_IO_APIC_irqs();
++ init_IO_APIC_traps();
++ check_timer();
++ if (!acpi_ioapic)
++ print_IO_APIC();
++}
++
++static int __init setup_disable_8254_timer(char *s)
++{
++ timer_over_8254 = -1;
++ return 1;
++}
++static int __init setup_enable_8254_timer(char *s)
++{
++ timer_over_8254 = 2;
++ return 1;
++}
++
++__setup("disable_8254_timer", setup_disable_8254_timer);
++__setup("enable_8254_timer", setup_enable_8254_timer);
++
++/*
++ * Called after all the initialization is done. If we didnt find any
++ * APIC bugs then we can allow the modify fast path
++ */
++
++static int __init io_apic_bug_finalize(void)
++{
++ if(sis_apic_bug == -1)
++ sis_apic_bug = 0;
++ if (is_initial_xendomain()) {
++ struct xen_platform_op op = { .cmd = XENPF_platform_quirk };
++ op.u.platform_quirk.quirk_id = sis_apic_bug ?
++ QUIRK_IOAPIC_BAD_REGSEL : QUIRK_IOAPIC_GOOD_REGSEL;
++ VOID(HYPERVISOR_platform_op(&op));
++ }
++ return 0;
++}
++
++late_initcall(io_apic_bug_finalize);
++
++struct sysfs_ioapic_data {
++ struct sys_device dev;
++ struct IO_APIC_route_entry entry[0];
++};
++static struct sysfs_ioapic_data * mp_ioapic_data[MAX_IO_APICS];
++
++static int ioapic_suspend(struct sys_device *dev, pm_message_t state)
++{
++ struct IO_APIC_route_entry *entry;
++ struct sysfs_ioapic_data *data;
++ unsigned long flags;
++ int i;
++
++ data = container_of(dev, struct sysfs_ioapic_data, dev);
++ entry = data->entry;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) {
++ *(((int *)entry) + 1) = io_apic_read(dev->id, 0x11 + 2 * i);
++ *(((int *)entry) + 0) = io_apic_read(dev->id, 0x10 + 2 * i);
++ }
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return 0;
++}
++
++static int ioapic_resume(struct sys_device *dev)
++{
++ struct IO_APIC_route_entry *entry;
++ struct sysfs_ioapic_data *data;
++ unsigned long flags;
++ union IO_APIC_reg_00 reg_00;
++ int i;
++
++ data = container_of(dev, struct sysfs_ioapic_data, dev);
++ entry = data->entry;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(dev->id, 0);
++ if (reg_00.bits.ID != mp_ioapics[dev->id].mpc_apicid) {
++ reg_00.bits.ID = mp_ioapics[dev->id].mpc_apicid;
++ io_apic_write(dev->id, 0, reg_00.raw);
++ }
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) {
++ io_apic_write(dev->id, 0x11+2*i, *(((int *)entry)+1));
++ io_apic_write(dev->id, 0x10+2*i, *(((int *)entry)+0));
++ }
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return 0;
++}
++
++static struct sysdev_class ioapic_sysdev_class = {
++ set_kset_name("ioapic"),
++#ifndef CONFIG_XEN
++ .suspend = ioapic_suspend,
++ .resume = ioapic_resume,
++#endif
++};
++
++static int __init ioapic_init_sysfs(void)
++{
++ struct sys_device * dev;
++ int i, size, error = 0;
++
++ error = sysdev_class_register(&ioapic_sysdev_class);
++ if (error)
++ return error;
++
++ for (i = 0; i < nr_ioapics; i++ ) {
++ size = sizeof(struct sys_device) + nr_ioapic_registers[i]
++ * sizeof(struct IO_APIC_route_entry);
++ mp_ioapic_data[i] = kmalloc(size, GFP_KERNEL);
++ if (!mp_ioapic_data[i]) {
++ printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i);
++ continue;
++ }
++ memset(mp_ioapic_data[i], 0, size);
++ dev = &mp_ioapic_data[i]->dev;
++ dev->id = i;
++ dev->cls = &ioapic_sysdev_class;
++ error = sysdev_register(dev);
++ if (error) {
++ kfree(mp_ioapic_data[i]);
++ mp_ioapic_data[i] = NULL;
++ printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i);
++ continue;
++ }
++ }
++
++ return 0;
++}
++
++device_initcall(ioapic_init_sysfs);
++
++/* --------------------------------------------------------------------------
++ ACPI-based IOAPIC Configuration
++ -------------------------------------------------------------------------- */
++
++#ifdef CONFIG_ACPI
++
++int __init io_apic_get_unique_id (int ioapic, int apic_id)
++{
++#ifndef CONFIG_XEN
++ union IO_APIC_reg_00 reg_00;
++ static physid_mask_t apic_id_map = PHYSID_MASK_NONE;
++ physid_mask_t tmp;
++ unsigned long flags;
++ int i = 0;
++
++ /*
++ * The P4 platform supports up to 256 APIC IDs on two separate APIC
++ * buses (one for LAPICs, one for IOAPICs), where predecessors only
++ * supports up to 16 on one shared APIC bus.
++ *
++ * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full
++ * advantage of new APIC bus architecture.
++ */
++
++ if (physids_empty(apic_id_map))
++ apic_id_map = ioapic_phys_id_map(phys_cpu_present_map);
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(ioapic, 0);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ if (apic_id >= get_physical_broadcast()) {
++ printk(KERN_WARNING "IOAPIC[%d]: Invalid apic_id %d, trying "
++ "%d\n", ioapic, apic_id, reg_00.bits.ID);
++ apic_id = reg_00.bits.ID;
++ }
++
++ /*
++ * Every APIC in a system must have a unique ID or we get lots of nice
++ * 'stuck on smp_invalidate_needed IPI wait' messages.
++ */
++ if (check_apicid_used(apic_id_map, apic_id)) {
++
++ for (i = 0; i < get_physical_broadcast(); i++) {
++ if (!check_apicid_used(apic_id_map, i))
++ break;
++ }
++
++ if (i == get_physical_broadcast())
++ panic("Max apic_id exceeded!\n");
++
++ printk(KERN_WARNING "IOAPIC[%d]: apic_id %d already used, "
++ "trying %d\n", ioapic, apic_id, i);
++
++ apic_id = i;
++ }
++
++ tmp = apicid_to_cpu_present(apic_id);
++ physids_or(apic_id_map, apic_id_map, tmp);
++
++ if (reg_00.bits.ID != apic_id) {
++ reg_00.bits.ID = apic_id;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(ioapic, 0, reg_00.raw);
++ reg_00.raw = io_apic_read(ioapic, 0);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ /* Sanity check */
++ if (reg_00.bits.ID != apic_id) {
++ printk("IOAPIC[%d]: Unable to change apic_id!\n", ioapic);
++ return -1;
++ }
++ }
++
++ apic_printk(APIC_VERBOSE, KERN_INFO
++ "IOAPIC[%d]: Assigned apic_id %d\n", ioapic, apic_id);
++#endif /* !CONFIG_XEN */
++
++ return apic_id;
++}
++
++
++int __init io_apic_get_version (int ioapic)
++{
++ union IO_APIC_reg_01 reg_01;
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_01.raw = io_apic_read(ioapic, 1);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return reg_01.bits.version;
++}
++
++
++int __init io_apic_get_redir_entries (int ioapic)
++{
++ union IO_APIC_reg_01 reg_01;
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_01.raw = io_apic_read(ioapic, 1);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return reg_01.bits.entries;
++}
++
++
++int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low)
++{
++ struct IO_APIC_route_entry entry;
++ unsigned long flags;
++
++ if (!IO_APIC_IRQ(irq)) {
++ printk(KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
++ ioapic);
++ return -EINVAL;
++ }
++
++ /*
++ * Generate a PCI IRQ routing entry and program the IOAPIC accordingly.
++ * Note that we mask (disable) IRQs now -- these get enabled when the
++ * corresponding device driver registers for this IRQ.
++ */
++
++ memset(&entry,0,sizeof(entry));
++
++ entry.delivery_mode = INT_DELIVERY_MODE;
++ entry.dest_mode = INT_DEST_MODE;
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++ entry.trigger = edge_level;
++ entry.polarity = active_high_low;
++ entry.mask = 1;
++
++ /*
++ * IRQs < 16 are already in the irq_2_pin[] map
++ */
++ if (irq >= 16)
++ add_pin_to_irq(irq, ioapic, pin);
++
++ entry.vector = assign_irq_vector(irq);
++
++ apic_printk(APIC_DEBUG, KERN_DEBUG "IOAPIC[%d]: Set PCI routing entry "
++ "(%d-%d -> 0x%x -> IRQ %d Mode:%i Active:%i)\n", ioapic,
++ mp_ioapics[ioapic].mpc_apicid, pin, entry.vector, irq,
++ edge_level, active_high_low);
++
++ ioapic_register_intr(irq, entry.vector, edge_level);
++
++ if (!ioapic && (irq < 16))
++ disable_8259A_irq(irq);
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(ioapic, 0x11+2*pin, *(((int *)&entry)+1));
++ io_apic_write(ioapic, 0x10+2*pin, *(((int *)&entry)+0));
++ set_native_irq_info(use_pci_vector() ? entry.vector : irq, TARGET_CPUS);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return 0;
++}
++
++#endif /* CONFIG_ACPI */
+Index: head-2008-11-25/arch/x86/kernel/ioport_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/ioport_32-xen.c 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,123 @@
++/*
++ * linux/arch/i386/kernel/ioport.c
++ *
++ * This contains the io-permission bitmap code - written by obz, with changes
++ * by Linus.
++ */
++
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/capability.h>
++#include <linux/errno.h>
++#include <linux/types.h>
++#include <linux/ioport.h>
++#include <linux/smp.h>
++#include <linux/smp_lock.h>
++#include <linux/stddef.h>
++#include <linux/slab.h>
++#include <linux/thread_info.h>
++#include <xen/interface/physdev.h>
++
++/* Set EXTENT bits starting at BASE in BITMAP to value TURN_ON. */
++static void set_bitmap(unsigned long *bitmap, unsigned int base, unsigned int extent, int new_value)
++{
++ unsigned long mask;
++ unsigned long *bitmap_base = bitmap + (base / BITS_PER_LONG);
++ unsigned int low_index = base & (BITS_PER_LONG-1);
++ int length = low_index + extent;
++
++ if (low_index != 0) {
++ mask = (~0UL << low_index);
++ if (length < BITS_PER_LONG)
++ mask &= ~(~0UL << length);
++ if (new_value)
++ *bitmap_base++ |= mask;
++ else
++ *bitmap_base++ &= ~mask;
++ length -= BITS_PER_LONG;
++ }
++
++ mask = (new_value ? ~0UL : 0UL);
++ while (length >= BITS_PER_LONG) {
++ *bitmap_base++ = mask;
++ length -= BITS_PER_LONG;
++ }
++
++ if (length > 0) {
++ mask = ~(~0UL << length);
++ if (new_value)
++ *bitmap_base++ |= mask;
++ else
++ *bitmap_base++ &= ~mask;
++ }
++}
++
++
++/*
++ * this changes the io permissions bitmap in the current task.
++ */
++asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
++{
++ struct thread_struct * t = ¤t->thread;
++ unsigned long *bitmap;
++ struct physdev_set_iobitmap set_iobitmap;
++
++ if ((from + num <= from) || (from + num > IO_BITMAP_BITS))
++ return -EINVAL;
++ if (turn_on && !capable(CAP_SYS_RAWIO))
++ return -EPERM;
++
++ /*
++ * If it's the first ioperm() call in this thread's lifetime, set the
++ * IO bitmap up. ioperm() is much less timing critical than clone(),
++ * this is why we delay this operation until now:
++ */
++ if (!t->io_bitmap_ptr) {
++ bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
++ if (!bitmap)
++ return -ENOMEM;
++
++ memset(bitmap, 0xff, IO_BITMAP_BYTES);
++ t->io_bitmap_ptr = bitmap;
++ set_thread_flag(TIF_IO_BITMAP);
++
++ set_xen_guest_handle(set_iobitmap.bitmap, (char *)bitmap);
++ set_iobitmap.nr_ports = IO_BITMAP_BITS;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap,
++ &set_iobitmap));
++ }
++
++ set_bitmap(t->io_bitmap_ptr, from, num, !turn_on);
++
++ return 0;
++}
++
++/*
++ * sys_iopl has to be used when you want to access the IO ports
++ * beyond the 0x3ff range: to get the full 65536 ports bitmapped
++ * you'd need 8kB of bitmaps/process, which is a bit excessive.
++ *
++ * Here we just change the eflags value on the stack: we allow
++ * only the super-user to do it. This depends on the stack-layout
++ * on system-call entry - see also fork() and the signal handling
++ * code.
++ */
++
++asmlinkage long sys_iopl(unsigned long unused)
++{
++ volatile struct pt_regs * regs = (struct pt_regs *) &unused;
++ unsigned int level = regs->ebx;
++ struct thread_struct *t = ¤t->thread;
++ unsigned int old = (t->iopl >> 12) & 3;
++
++ if (level > 3)
++ return -EINVAL;
++ /* Trying to gain more privileges? */
++ if (level > old) {
++ if (!capable(CAP_SYS_RAWIO))
++ return -EPERM;
++ }
++ t->iopl = level << 12;
++ set_iopl_mask(t->iopl);
++ return 0;
++}
+Index: head-2008-11-25/arch/x86/kernel/irq_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/irq_32-xen.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,324 @@
++/*
++ * linux/arch/i386/kernel/irq.c
++ *
++ * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
++ *
++ * This file contains the lowest level x86-specific interrupt
++ * entry, irq-stacks and irq statistics code. All the remaining
++ * irq logic is done by the generic kernel/irq/ code and
++ * by the x86-specific irq controller code. (e.g. i8259.c and
++ * io_apic.c.)
++ */
++
++#include <asm/uaccess.h>
++#include <linux/module.h>
++#include <linux/seq_file.h>
++#include <linux/interrupt.h>
++#include <linux/kernel_stat.h>
++#include <linux/notifier.h>
++#include <linux/cpu.h>
++#include <linux/delay.h>
++
++DEFINE_PER_CPU(irq_cpustat_t, irq_stat) ____cacheline_internodealigned_in_smp;
++EXPORT_PER_CPU_SYMBOL(irq_stat);
++
++#ifndef CONFIG_X86_LOCAL_APIC
++/*
++ * 'what should we do if we get a hw irq event on an illegal vector'.
++ * each architecture has to answer this themselves.
++ */
++void ack_bad_irq(unsigned int irq)
++{
++ printk("unexpected IRQ trap at vector %02x\n", irq);
++}
++#endif
++
++#ifdef CONFIG_4KSTACKS
++/*
++ * per-CPU IRQ handling contexts (thread information and stack)
++ */
++union irq_ctx {
++ struct thread_info tinfo;
++ u32 stack[THREAD_SIZE/sizeof(u32)];
++};
++
++static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly;
++static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
++#endif
++
++/*
++ * do_IRQ handles all normal device IRQ's (the special
++ * SMP cross-CPU interrupts have their own specific
++ * handlers).
++ */
++fastcall unsigned int do_IRQ(struct pt_regs *regs)
++{
++ /* high bit used in ret_from_ code */
++ int irq = ~regs->orig_eax;
++#ifdef CONFIG_4KSTACKS
++ union irq_ctx *curctx, *irqctx;
++ u32 *isp;
++#endif
++
++ if (unlikely((unsigned)irq >= NR_IRQS)) {
++ printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
++ __FUNCTION__, irq);
++ BUG();
++ }
++
++ /*irq_enter();*/
++#ifdef CONFIG_DEBUG_STACKOVERFLOW
++ /* Debugging check for stack overflow: is there less than 1KB free? */
++ {
++ long esp;
++
++ __asm__ __volatile__("andl %%esp,%0" :
++ "=r" (esp) : "0" (THREAD_SIZE - 1));
++ if (unlikely(esp < (sizeof(struct thread_info) + STACK_WARN))) {
++ printk("do_IRQ: stack overflow: %ld\n",
++ esp - sizeof(struct thread_info));
++ dump_stack();
++ }
++ }
++#endif
++
++#ifdef CONFIG_4KSTACKS
++
++ curctx = (union irq_ctx *) current_thread_info();
++ irqctx = hardirq_ctx[smp_processor_id()];
++
++ /*
++ * this is where we switch to the IRQ stack. However, if we are
++ * already using the IRQ stack (because we interrupted a hardirq
++ * handler) we can't do that and just have to keep using the
++ * current stack (which is the irq stack already after all)
++ */
++ if (curctx != irqctx) {
++ int arg1, arg2, ebx;
++
++ /* build the stack frame on the IRQ stack */
++ isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
++ irqctx->tinfo.task = curctx->tinfo.task;
++ irqctx->tinfo.previous_esp = current_stack_pointer;
++
++ /*
++ * Copy the softirq bits in preempt_count so that the
++ * softirq checks work in the hardirq context.
++ */
++ irqctx->tinfo.preempt_count =
++ (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) |
++ (curctx->tinfo.preempt_count & SOFTIRQ_MASK);
++
++ asm volatile(
++ " xchgl %%ebx,%%esp \n"
++ " call __do_IRQ \n"
++ " movl %%ebx,%%esp \n"
++ : "=a" (arg1), "=d" (arg2), "=b" (ebx)
++ : "0" (irq), "1" (regs), "2" (isp)
++ : "memory", "cc", "ecx"
++ );
++ } else
++#endif
++ __do_IRQ(irq, regs);
++
++ /*irq_exit();*/
++
++ return 1;
++}
++
++#ifdef CONFIG_4KSTACKS
++
++/*
++ * These should really be __section__(".bss.page_aligned") as well, but
++ * gcc's 3.0 and earlier don't handle that correctly.
++ */
++static char softirq_stack[NR_CPUS * THREAD_SIZE]
++ __attribute__((__aligned__(THREAD_SIZE)));
++
++static char hardirq_stack[NR_CPUS * THREAD_SIZE]
++ __attribute__((__aligned__(THREAD_SIZE)));
++
++/*
++ * allocate per-cpu stacks for hardirq and for softirq processing
++ */
++void irq_ctx_init(int cpu)
++{
++ union irq_ctx *irqctx;
++
++ if (hardirq_ctx[cpu])
++ return;
++
++ irqctx = (union irq_ctx*) &hardirq_stack[cpu*THREAD_SIZE];
++ irqctx->tinfo.task = NULL;
++ irqctx->tinfo.exec_domain = NULL;
++ irqctx->tinfo.cpu = cpu;
++ irqctx->tinfo.preempt_count = HARDIRQ_OFFSET;
++ irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);
++
++ hardirq_ctx[cpu] = irqctx;
++
++ irqctx = (union irq_ctx*) &softirq_stack[cpu*THREAD_SIZE];
++ irqctx->tinfo.task = NULL;
++ irqctx->tinfo.exec_domain = NULL;
++ irqctx->tinfo.cpu = cpu;
++ irqctx->tinfo.preempt_count = 0;
++ irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);
++
++ softirq_ctx[cpu] = irqctx;
++
++ printk("CPU %u irqstacks, hard=%p soft=%p\n",
++ cpu,hardirq_ctx[cpu],softirq_ctx[cpu]);
++}
++
++void irq_ctx_exit(int cpu)
++{
++ hardirq_ctx[cpu] = NULL;
++}
++
++extern asmlinkage void __do_softirq(void);
++
++asmlinkage void do_softirq(void)
++{
++ unsigned long flags;
++ struct thread_info *curctx;
++ union irq_ctx *irqctx;
++ u32 *isp;
++
++ if (in_interrupt())
++ return;
++
++ local_irq_save(flags);
++
++ if (local_softirq_pending()) {
++ curctx = current_thread_info();
++ irqctx = softirq_ctx[smp_processor_id()];
++ irqctx->tinfo.task = curctx->task;
++ irqctx->tinfo.previous_esp = current_stack_pointer;
++
++ /* build the stack frame on the softirq stack */
++ isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
++
++ asm volatile(
++ " xchgl %%ebx,%%esp \n"
++ " call __do_softirq \n"
++ " movl %%ebx,%%esp \n"
++ : "=b"(isp)
++ : "0"(isp)
++ : "memory", "cc", "edx", "ecx", "eax"
++ );
++ /*
++ * Shouldnt happen, we returned above if in_interrupt():
++ */
++ WARN_ON_ONCE(softirq_count());
++ }
++
++ local_irq_restore(flags);
++}
++
++EXPORT_SYMBOL(do_softirq);
++#endif
++
++/*
++ * Interrupt statistics:
++ */
++
++atomic_t irq_err_count;
++
++/*
++ * /proc/interrupts printing:
++ */
++
++int show_interrupts(struct seq_file *p, void *v)
++{
++ int i = *(loff_t *) v, j;
++ struct irqaction * action;
++ unsigned long flags;
++
++ if (i == 0) {
++ seq_printf(p, " ");
++ for_each_online_cpu(j)
++ seq_printf(p, "CPU%-8d",j);
++ seq_putc(p, '\n');
++ }
++
++ if (i < NR_IRQS) {
++ spin_lock_irqsave(&irq_desc[i].lock, flags);
++ action = irq_desc[i].action;
++ if (!action)
++ goto skip;
++ seq_printf(p, "%3d: ",i);
++#ifndef CONFIG_SMP
++ seq_printf(p, "%10u ", kstat_irqs(i));
++#else
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
++#endif
++ seq_printf(p, " %14s", irq_desc[i].chip->typename);
++ seq_printf(p, " %s", action->name);
++
++ for (action=action->next; action; action = action->next)
++ seq_printf(p, ", %s", action->name);
++
++ seq_putc(p, '\n');
++skip:
++ spin_unlock_irqrestore(&irq_desc[i].lock, flags);
++ } else if (i == NR_IRQS) {
++ seq_printf(p, "NMI: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", nmi_count(j));
++ seq_putc(p, '\n');
++#ifdef CONFIG_X86_LOCAL_APIC
++ seq_printf(p, "LOC: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ",
++ per_cpu(irq_stat,j).apic_timer_irqs);
++ seq_putc(p, '\n');
++#endif
++ seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
++#if defined(CONFIG_X86_IO_APIC)
++ seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
++#endif
++ }
++ return 0;
++}
++
++#ifdef CONFIG_HOTPLUG_CPU
++
++void fixup_irqs(cpumask_t map)
++{
++ unsigned int irq;
++ static int warned;
++
++ for (irq = 0; irq < NR_IRQS; irq++) {
++ cpumask_t mask;
++ if (irq == 2)
++ continue;
++
++ cpus_and(mask, irq_desc[irq].affinity, map);
++ if (any_online_cpu(mask) == NR_CPUS) {
++ /*printk("Breaking affinity for irq %i\n", irq);*/
++ mask = map;
++ }
++ if (irq_desc[irq].chip->set_affinity)
++ irq_desc[irq].chip->set_affinity(irq, mask);
++ else if (irq_desc[irq].action && !(warned++))
++ printk("Cannot set affinity for irq %i\n", irq);
++ }
++
++#if 0
++ barrier();
++ /* Ingo Molnar says: "after the IO-APIC masks have been redirected
++ [note the nop - the interrupt-enable boundary on x86 is two
++ instructions from sti] - to flush out pending hardirqs and
++ IPIs. After this point nothing is supposed to reach this CPU." */
++ __asm__ __volatile__("sti; nop; cli");
++ barrier();
++#else
++ /* That doesn't seem sufficient. Give it 1ms. */
++ local_irq_enable();
++ mdelay(1);
++ local_irq_disable();
++#endif
++}
++#endif
++
+Index: head-2008-11-25/arch/x86/kernel/ldt_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/ldt_32-xen.c 2007-06-12 13:12:48.000000000 +0200
+@@ -0,0 +1,270 @@
++/*
++ * linux/kernel/ldt.c
++ *
++ * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
++ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
++ */
++
++#include <linux/errno.h>
++#include <linux/sched.h>
++#include <linux/string.h>
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/smp_lock.h>
++#include <linux/vmalloc.h>
++#include <linux/slab.h>
++
++#include <asm/uaccess.h>
++#include <asm/system.h>
++#include <asm/ldt.h>
++#include <asm/desc.h>
++#include <asm/mmu_context.h>
++
++#ifdef CONFIG_SMP /* avoids "defined but not used" warnig */
++static void flush_ldt(void *null)
++{
++ if (current->active_mm)
++ load_LDT(¤t->active_mm->context);
++}
++#endif
++
++static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
++{
++ void *oldldt;
++ void *newldt;
++ int oldsize;
++
++ if (mincount <= pc->size)
++ return 0;
++ oldsize = pc->size;
++ mincount = (mincount+511)&(~511);
++ if (mincount*LDT_ENTRY_SIZE > PAGE_SIZE)
++ newldt = vmalloc(mincount*LDT_ENTRY_SIZE);
++ else
++ newldt = kmalloc(mincount*LDT_ENTRY_SIZE, GFP_KERNEL);
++
++ if (!newldt)
++ return -ENOMEM;
++
++ if (oldsize)
++ memcpy(newldt, pc->ldt, oldsize*LDT_ENTRY_SIZE);
++ oldldt = pc->ldt;
++ memset(newldt+oldsize*LDT_ENTRY_SIZE, 0, (mincount-oldsize)*LDT_ENTRY_SIZE);
++ pc->ldt = newldt;
++ wmb();
++ pc->size = mincount;
++ wmb();
++
++ if (reload) {
++#ifdef CONFIG_SMP
++ cpumask_t mask;
++ preempt_disable();
++#endif
++ make_pages_readonly(
++ pc->ldt,
++ (pc->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ load_LDT(pc);
++#ifdef CONFIG_SMP
++ mask = cpumask_of_cpu(smp_processor_id());
++ if (!cpus_equal(current->mm->cpu_vm_mask, mask))
++ smp_call_function(flush_ldt, NULL, 1, 1);
++ preempt_enable();
++#endif
++ }
++ if (oldsize) {
++ make_pages_writable(
++ oldldt,
++ (oldsize * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ if (oldsize*LDT_ENTRY_SIZE > PAGE_SIZE)
++ vfree(oldldt);
++ else
++ kfree(oldldt);
++ }
++ return 0;
++}
++
++static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
++{
++ int err = alloc_ldt(new, old->size, 0);
++ if (err < 0)
++ return err;
++ memcpy(new->ldt, old->ldt, old->size*LDT_ENTRY_SIZE);
++ make_pages_readonly(
++ new->ldt,
++ (new->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ return 0;
++}
++
++/*
++ * we do not have to muck with descriptors here, that is
++ * done in switch_mm() as needed.
++ */
++int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
++{
++ struct mm_struct * old_mm;
++ int retval = 0;
++
++ init_MUTEX(&mm->context.sem);
++ mm->context.size = 0;
++ mm->context.has_foreign_mappings = 0;
++ old_mm = current->mm;
++ if (old_mm && old_mm->context.size > 0) {
++ down(&old_mm->context.sem);
++ retval = copy_ldt(&mm->context, &old_mm->context);
++ up(&old_mm->context.sem);
++ }
++ return retval;
++}
++
++/*
++ * No need to lock the MM as we are the last user
++ */
++void destroy_context(struct mm_struct *mm)
++{
++ if (mm->context.size) {
++ if (mm == current->active_mm)
++ clear_LDT();
++ make_pages_writable(
++ mm->context.ldt,
++ (mm->context.size * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ if (mm->context.size*LDT_ENTRY_SIZE > PAGE_SIZE)
++ vfree(mm->context.ldt);
++ else
++ kfree(mm->context.ldt);
++ mm->context.size = 0;
++ }
++}
++
++static int read_ldt(void __user * ptr, unsigned long bytecount)
++{
++ int err;
++ unsigned long size;
++ struct mm_struct * mm = current->mm;
++
++ if (!mm->context.size)
++ return 0;
++ if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
++ bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
++
++ down(&mm->context.sem);
++ size = mm->context.size*LDT_ENTRY_SIZE;
++ if (size > bytecount)
++ size = bytecount;
++
++ err = 0;
++ if (copy_to_user(ptr, mm->context.ldt, size))
++ err = -EFAULT;
++ up(&mm->context.sem);
++ if (err < 0)
++ goto error_return;
++ if (size != bytecount) {
++ /* zero-fill the rest */
++ if (clear_user(ptr+size, bytecount-size) != 0) {
++ err = -EFAULT;
++ goto error_return;
++ }
++ }
++ return bytecount;
++error_return:
++ return err;
++}
++
++static int read_default_ldt(void __user * ptr, unsigned long bytecount)
++{
++ int err;
++ unsigned long size;
++ void *address;
++
++ err = 0;
++ address = &default_ldt[0];
++ size = 5*sizeof(struct desc_struct);
++ if (size > bytecount)
++ size = bytecount;
++
++ err = size;
++ if (copy_to_user(ptr, address, size))
++ err = -EFAULT;
++
++ return err;
++}
++
++static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
++{
++ struct mm_struct * mm = current->mm;
++ __u32 entry_1, entry_2;
++ int error;
++ struct user_desc ldt_info;
++
++ error = -EINVAL;
++ if (bytecount != sizeof(ldt_info))
++ goto out;
++ error = -EFAULT;
++ if (copy_from_user(&ldt_info, ptr, sizeof(ldt_info)))
++ goto out;
++
++ error = -EINVAL;
++ if (ldt_info.entry_number >= LDT_ENTRIES)
++ goto out;
++ if (ldt_info.contents == 3) {
++ if (oldmode)
++ goto out;
++ if (ldt_info.seg_not_present == 0)
++ goto out;
++ }
++
++ down(&mm->context.sem);
++ if (ldt_info.entry_number >= mm->context.size) {
++ error = alloc_ldt(¤t->mm->context, ldt_info.entry_number+1, 1);
++ if (error < 0)
++ goto out_unlock;
++ }
++
++ /* Allow LDTs to be cleared by the user. */
++ if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
++ if (oldmode || LDT_empty(&ldt_info)) {
++ entry_1 = 0;
++ entry_2 = 0;
++ goto install;
++ }
++ }
++
++ entry_1 = LDT_entry_a(&ldt_info);
++ entry_2 = LDT_entry_b(&ldt_info);
++ if (oldmode)
++ entry_2 &= ~(1 << 20);
++
++ /* Install the new entry ... */
++install:
++ error = write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
++ entry_1, entry_2);
++
++out_unlock:
++ up(&mm->context.sem);
++out:
++ return error;
++}
++
++asmlinkage int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
++{
++ int ret = -ENOSYS;
++
++ switch (func) {
++ case 0:
++ ret = read_ldt(ptr, bytecount);
++ break;
++ case 1:
++ ret = write_ldt(ptr, bytecount, 1);
++ break;
++ case 2:
++ ret = read_default_ldt(ptr, bytecount);
++ break;
++ case 0x11:
++ ret = write_ldt(ptr, bytecount, 0);
++ break;
++ }
++ return ret;
++}
+Index: head-2008-11-25/arch/x86/kernel/microcode-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/microcode-xen.c 2007-06-12 13:12:48.000000000 +0200
+@@ -0,0 +1,144 @@
++/*
++ * Intel CPU Microcode Update Driver for Linux
++ *
++ * Copyright (C) 2000-2004 Tigran Aivazian
++ *
++ * This driver allows to upgrade microcode on Intel processors
++ * belonging to IA-32 family - PentiumPro, Pentium II,
++ * Pentium III, Xeon, Pentium 4, etc.
++ *
++ * Reference: Section 8.10 of Volume III, Intel Pentium 4 Manual,
++ * Order Number 245472 or free download from:
++ *
++ * http://developer.intel.com/design/pentium4/manuals/245472.htm
++ *
++ * For more information, go to http://www.urbanmyth.org/microcode
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ */
++
++//#define DEBUG /* pr_debug */
++#include <linux/capability.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/sched.h>
++#include <linux/cpumask.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/vmalloc.h>
++#include <linux/miscdevice.h>
++#include <linux/spinlock.h>
++#include <linux/mm.h>
++#include <linux/mutex.h>
++#include <linux/syscalls.h>
++
++#include <asm/msr.h>
++#include <asm/uaccess.h>
++#include <asm/processor.h>
++
++MODULE_DESCRIPTION("Intel CPU (IA-32) Microcode Update Driver");
++MODULE_AUTHOR("Tigran Aivazian <tigran@veritas.com>");
++MODULE_LICENSE("GPL");
++
++static int verbose;
++module_param(verbose, int, 0644);
++
++#define MICROCODE_VERSION "1.14a-xen"
++
++#define DEFAULT_UCODE_DATASIZE (2000) /* 2000 bytes */
++#define MC_HEADER_SIZE (sizeof (microcode_header_t)) /* 48 bytes */
++#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) /* 2048 bytes */
++
++/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
++static DEFINE_MUTEX(microcode_mutex);
++
++static int microcode_open (struct inode *unused1, struct file *unused2)
++{
++ return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
++}
++
++
++static int do_microcode_update (const void __user *ubuf, size_t len)
++{
++ int err;
++ void *kbuf;
++
++ kbuf = vmalloc(len);
++ if (!kbuf)
++ return -ENOMEM;
++
++ if (copy_from_user(kbuf, ubuf, len) == 0) {
++ struct xen_platform_op op;
++
++ op.cmd = XENPF_microcode_update;
++ set_xen_guest_handle(op.u.microcode.data, kbuf);
++ op.u.microcode.length = len;
++ err = HYPERVISOR_platform_op(&op);
++ } else
++ err = -EFAULT;
++
++ vfree(kbuf);
++
++ return err;
++}
++
++static ssize_t microcode_write (struct file *file, const char __user *buf, size_t len, loff_t *ppos)
++{
++ ssize_t ret;
++
++ if (len < MC_HEADER_SIZE) {
++ printk(KERN_ERR "microcode: not enough data\n");
++ return -EINVAL;
++ }
++
++ mutex_lock(µcode_mutex);
++
++ ret = do_microcode_update(buf, len);
++ if (!ret)
++ ret = (ssize_t)len;
++
++ mutex_unlock(µcode_mutex);
++
++ return ret;
++}
++
++static struct file_operations microcode_fops = {
++ .owner = THIS_MODULE,
++ .write = microcode_write,
++ .open = microcode_open,
++};
++
++static struct miscdevice microcode_dev = {
++ .minor = MICROCODE_MINOR,
++ .name = "microcode",
++ .fops = µcode_fops,
++};
++
++static int __init microcode_init (void)
++{
++ int error;
++
++ error = misc_register(µcode_dev);
++ if (error) {
++ printk(KERN_ERR
++ "microcode: can't misc_register on minor=%d\n",
++ MICROCODE_MINOR);
++ return error;
++ }
++
++ printk(KERN_INFO
++ "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@veritas.com>\n");
++ return 0;
++}
++
++static void __exit microcode_exit (void)
++{
++ misc_deregister(µcode_dev);
++}
++
++module_init(microcode_init)
++module_exit(microcode_exit)
++MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
+Index: head-2008-11-25/arch/x86/kernel/mpparse_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/mpparse_32-xen.c 2007-06-12 13:12:48.000000000 +0200
+@@ -0,0 +1,1185 @@
++/*
++ * Intel Multiprocessor Specification 1.1 and 1.4
++ * compliant MP-table parsing routines.
++ *
++ * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
++ * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
++ *
++ * Fixes
++ * Erich Boleyn : MP v1.4 and additional changes.
++ * Alan Cox : Added EBDA scanning
++ * Ingo Molnar : various cleanups and rewrites
++ * Maciej W. Rozycki: Bits for default MP configurations
++ * Paul Diefenbaugh: Added full ACPI support
++ */
++
++#include <linux/mm.h>
++#include <linux/init.h>
++#include <linux/acpi.h>
++#include <linux/delay.h>
++#include <linux/bootmem.h>
++#include <linux/smp_lock.h>
++#include <linux/kernel_stat.h>
++#include <linux/mc146818rtc.h>
++#include <linux/bitops.h>
++
++#include <asm/smp.h>
++#include <asm/acpi.h>
++#include <asm/mtrr.h>
++#include <asm/mpspec.h>
++#include <asm/io_apic.h>
++
++#include <mach_apic.h>
++#include <mach_mpparse.h>
++#include <bios_ebda.h>
++
++/* Have we found an MP table */
++int smp_found_config;
++unsigned int __initdata maxcpus = NR_CPUS;
++
++/*
++ * Various Linux-internal data structures created from the
++ * MP-table.
++ */
++int apic_version [MAX_APICS];
++int mp_bus_id_to_type [MAX_MP_BUSSES];
++int mp_bus_id_to_node [MAX_MP_BUSSES];
++int mp_bus_id_to_local [MAX_MP_BUSSES];
++int quad_local_to_mp_bus_id [NR_CPUS/4][4];
++int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
++static int mp_current_pci_id;
++
++/* I/O APIC entries */
++struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
++
++/* # of MP IRQ source entries */
++struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
++
++/* MP IRQ source entries */
++int mp_irq_entries;
++
++int nr_ioapics;
++
++int pic_mode;
++unsigned long mp_lapic_addr;
++
++unsigned int def_to_bigsmp = 0;
++
++/* Processor that is doing the boot up */
++unsigned int boot_cpu_physical_apicid = -1U;
++/* Internal processor count */
++static unsigned int __devinitdata num_processors;
++
++/* Bitmask of physically existing CPUs */
++physid_mask_t phys_cpu_present_map;
++
++u8 bios_cpu_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
++
++/*
++ * Intel MP BIOS table parsing routines:
++ */
++
++
++/*
++ * Checksum an MP configuration block.
++ */
++
++static int __init mpf_checksum(unsigned char *mp, int len)
++{
++ int sum = 0;
++
++ while (len--)
++ sum += *mp++;
++
++ return sum & 0xFF;
++}
++
++/*
++ * Have to match translation table entries to main table entries by counter
++ * hence the mpc_record variable .... can't see a less disgusting way of
++ * doing this ....
++ */
++
++static int mpc_record;
++static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY] __initdata;
++
++#ifndef CONFIG_XEN
++static void __devinit MP_processor_info (struct mpc_config_processor *m)
++{
++ int ver, apicid;
++ physid_mask_t phys_cpu;
++
++ if (!(m->mpc_cpuflag & CPU_ENABLED))
++ return;
++
++ apicid = mpc_apic_id(m, translation_table[mpc_record]);
++
++ if (m->mpc_featureflag&(1<<0))
++ Dprintk(" Floating point unit present.\n");
++ if (m->mpc_featureflag&(1<<7))
++ Dprintk(" Machine Exception supported.\n");
++ if (m->mpc_featureflag&(1<<8))
++ Dprintk(" 64 bit compare & exchange supported.\n");
++ if (m->mpc_featureflag&(1<<9))
++ Dprintk(" Internal APIC present.\n");
++ if (m->mpc_featureflag&(1<<11))
++ Dprintk(" SEP present.\n");
++ if (m->mpc_featureflag&(1<<12))
++ Dprintk(" MTRR present.\n");
++ if (m->mpc_featureflag&(1<<13))
++ Dprintk(" PGE present.\n");
++ if (m->mpc_featureflag&(1<<14))
++ Dprintk(" MCA present.\n");
++ if (m->mpc_featureflag&(1<<15))
++ Dprintk(" CMOV present.\n");
++ if (m->mpc_featureflag&(1<<16))
++ Dprintk(" PAT present.\n");
++ if (m->mpc_featureflag&(1<<17))
++ Dprintk(" PSE present.\n");
++ if (m->mpc_featureflag&(1<<18))
++ Dprintk(" PSN present.\n");
++ if (m->mpc_featureflag&(1<<19))
++ Dprintk(" Cache Line Flush Instruction present.\n");
++ /* 20 Reserved */
++ if (m->mpc_featureflag&(1<<21))
++ Dprintk(" Debug Trace and EMON Store present.\n");
++ if (m->mpc_featureflag&(1<<22))
++ Dprintk(" ACPI Thermal Throttle Registers present.\n");
++ if (m->mpc_featureflag&(1<<23))
++ Dprintk(" MMX present.\n");
++ if (m->mpc_featureflag&(1<<24))
++ Dprintk(" FXSR present.\n");
++ if (m->mpc_featureflag&(1<<25))
++ Dprintk(" XMM present.\n");
++ if (m->mpc_featureflag&(1<<26))
++ Dprintk(" Willamette New Instructions present.\n");
++ if (m->mpc_featureflag&(1<<27))
++ Dprintk(" Self Snoop present.\n");
++ if (m->mpc_featureflag&(1<<28))
++ Dprintk(" HT present.\n");
++ if (m->mpc_featureflag&(1<<29))
++ Dprintk(" Thermal Monitor present.\n");
++ /* 30, 31 Reserved */
++
++
++ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
++ Dprintk(" Bootup CPU\n");
++ boot_cpu_physical_apicid = m->mpc_apicid;
++ }
++
++ ver = m->mpc_apicver;
++
++ /*
++ * Validate version
++ */
++ if (ver == 0x0) {
++ printk(KERN_WARNING "BIOS bug, APIC version is 0 for CPU#%d! "
++ "fixing up to 0x10. (tell your hw vendor)\n",
++ m->mpc_apicid);
++ ver = 0x10;
++ }
++ apic_version[m->mpc_apicid] = ver;
++
++ phys_cpu = apicid_to_cpu_present(apicid);
++ physids_or(phys_cpu_present_map, phys_cpu_present_map, phys_cpu);
++
++ if (num_processors >= NR_CPUS) {
++ printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
++ " Processor ignored.\n", NR_CPUS);
++ return;
++ }
++
++ if (num_processors >= maxcpus) {
++ printk(KERN_WARNING "WARNING: maxcpus limit of %i reached."
++ " Processor ignored.\n", maxcpus);
++ return;
++ }
++
++ cpu_set(num_processors, cpu_possible_map);
++ num_processors++;
++
++ /*
++ * Would be preferable to switch to bigsmp when CONFIG_HOTPLUG_CPU=y
++ * but we need to work other dependencies like SMP_SUSPEND etc
++ * before this can be done without some confusion.
++ * if (CPU_HOTPLUG_ENABLED || num_processors > 8)
++ * - Ashok Raj <ashok.raj@intel.com>
++ */
++ if (num_processors > 8) {
++ switch (boot_cpu_data.x86_vendor) {
++ case X86_VENDOR_INTEL:
++ if (!APIC_XAPIC(ver)) {
++ def_to_bigsmp = 0;
++ break;
++ }
++ /* If P4 and above fall through */
++ case X86_VENDOR_AMD:
++ def_to_bigsmp = 1;
++ }
++ }
++ bios_cpu_apicid[num_processors - 1] = m->mpc_apicid;
++}
++#else
++void __init MP_processor_info (struct mpc_config_processor *m)
++{
++ num_processors++;
++}
++#endif /* CONFIG_XEN */
++
++static void __init MP_bus_info (struct mpc_config_bus *m)
++{
++ char str[7];
++
++ memcpy(str, m->mpc_bustype, 6);
++ str[6] = 0;
++
++ mpc_oem_bus_info(m, str, translation_table[mpc_record]);
++
++ if (m->mpc_busid >= MAX_MP_BUSSES) {
++ printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
++ " is too large, max. supported is %d\n",
++ m->mpc_busid, str, MAX_MP_BUSSES - 1);
++ return;
++ }
++
++ if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA)-1) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
++ } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA)-1) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_EISA;
++ } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI)-1) == 0) {
++ mpc_oem_pci_bus(m, translation_table[mpc_record]);
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI;
++ mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
++ mp_current_pci_id++;
++ } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA)-1) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
++ } else if (strncmp(str, BUSTYPE_NEC98, sizeof(BUSTYPE_NEC98)-1) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_NEC98;
++ } else {
++ printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
++ }
++}
++
++static void __init MP_ioapic_info (struct mpc_config_ioapic *m)
++{
++ if (!(m->mpc_flags & MPC_APIC_USABLE))
++ return;
++
++ printk(KERN_INFO "I/O APIC #%d Version %d at 0x%lX.\n",
++ m->mpc_apicid, m->mpc_apicver, m->mpc_apicaddr);
++ if (nr_ioapics >= MAX_IO_APICS) {
++ printk(KERN_CRIT "Max # of I/O APICs (%d) exceeded (found %d).\n",
++ MAX_IO_APICS, nr_ioapics);
++ panic("Recompile kernel with bigger MAX_IO_APICS!.\n");
++ }
++ if (!m->mpc_apicaddr) {
++ printk(KERN_ERR "WARNING: bogus zero I/O APIC address"
++ " found in MP table, skipping!\n");
++ return;
++ }
++ mp_ioapics[nr_ioapics] = *m;
++ nr_ioapics++;
++}
++
++static void __init MP_intsrc_info (struct mpc_config_intsrc *m)
++{
++ mp_irqs [mp_irq_entries] = *m;
++ Dprintk("Int: type %d, pol %d, trig %d, bus %d,"
++ " IRQ %02x, APIC ID %x, APIC INT %02x\n",
++ m->mpc_irqtype, m->mpc_irqflag & 3,
++ (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
++ m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
++ if (++mp_irq_entries == MAX_IRQ_SOURCES)
++ panic("Max # of irq sources exceeded!!\n");
++}
++
++static void __init MP_lintsrc_info (struct mpc_config_lintsrc *m)
++{
++ Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
++ " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
++ m->mpc_irqtype, m->mpc_irqflag & 3,
++ (m->mpc_irqflag >> 2) &3, m->mpc_srcbusid,
++ m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
++ /*
++ * Well it seems all SMP boards in existence
++ * use ExtINT/LVT1 == LINT0 and
++ * NMI/LVT2 == LINT1 - the following check
++ * will show us if this assumptions is false.
++ * Until then we do not have to add baggage.
++ */
++ if ((m->mpc_irqtype == mp_ExtINT) &&
++ (m->mpc_destapiclint != 0))
++ BUG();
++ if ((m->mpc_irqtype == mp_NMI) &&
++ (m->mpc_destapiclint != 1))
++ BUG();
++}
++
++#ifdef CONFIG_X86_NUMAQ
++static void __init MP_translation_info (struct mpc_config_translation *m)
++{
++ printk(KERN_INFO "Translation: record %d, type %d, quad %d, global %d, local %d\n", mpc_record, m->trans_type, m->trans_quad, m->trans_global, m->trans_local);
++
++ if (mpc_record >= MAX_MPC_ENTRY)
++ printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n");
++ else
++ translation_table[mpc_record] = m; /* stash this for later */
++ if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad))
++ node_set_online(m->trans_quad);
++}
++
++/*
++ * Read/parse the MPC oem tables
++ */
++
++static void __init smp_read_mpc_oem(struct mp_config_oemtable *oemtable, \
++ unsigned short oemsize)
++{
++ int count = sizeof (*oemtable); /* the header size */
++ unsigned char *oemptr = ((unsigned char *)oemtable)+count;
++
++ mpc_record = 0;
++ printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n", oemtable);
++ if (memcmp(oemtable->oem_signature,MPC_OEM_SIGNATURE,4))
++ {
++ printk(KERN_WARNING "SMP mpc oemtable: bad signature [%c%c%c%c]!\n",
++ oemtable->oem_signature[0],
++ oemtable->oem_signature[1],
++ oemtable->oem_signature[2],
++ oemtable->oem_signature[3]);
++ return;
++ }
++ if (mpf_checksum((unsigned char *)oemtable,oemtable->oem_length))
++ {
++ printk(KERN_WARNING "SMP oem mptable: checksum error!\n");
++ return;
++ }
++ while (count < oemtable->oem_length) {
++ switch (*oemptr) {
++ case MP_TRANSLATION:
++ {
++ struct mpc_config_translation *m=
++ (struct mpc_config_translation *)oemptr;
++ MP_translation_info(m);
++ oemptr += sizeof(*m);
++ count += sizeof(*m);
++ ++mpc_record;
++ break;
++ }
++ default:
++ {
++ printk(KERN_WARNING "Unrecognised OEM table entry type! - %d\n", (int) *oemptr);
++ return;
++ }
++ }
++ }
++}
++
++static inline void mps_oem_check(struct mp_config_table *mpc, char *oem,
++ char *productid)
++{
++ if (strncmp(oem, "IBM NUMA", 8))
++ printk("Warning! May not be a NUMA-Q system!\n");
++ if (mpc->mpc_oemptr)
++ smp_read_mpc_oem((struct mp_config_oemtable *) mpc->mpc_oemptr,
++ mpc->mpc_oemsize);
++}
++#endif /* CONFIG_X86_NUMAQ */
++
++/*
++ * Read/parse the MPC
++ */
++
++static int __init smp_read_mpc(struct mp_config_table *mpc)
++{
++ char str[16];
++ char oem[10];
++ int count=sizeof(*mpc);
++ unsigned char *mpt=((unsigned char *)mpc)+count;
++
++ if (memcmp(mpc->mpc_signature,MPC_SIGNATURE,4)) {
++ printk(KERN_ERR "SMP mptable: bad signature [0x%x]!\n",
++ *(u32 *)mpc->mpc_signature);
++ return 0;
++ }
++ if (mpf_checksum((unsigned char *)mpc,mpc->mpc_length)) {
++ printk(KERN_ERR "SMP mptable: checksum error!\n");
++ return 0;
++ }
++ if (mpc->mpc_spec!=0x01 && mpc->mpc_spec!=0x04) {
++ printk(KERN_ERR "SMP mptable: bad table version (%d)!!\n",
++ mpc->mpc_spec);
++ return 0;
++ }
++ if (!mpc->mpc_lapic) {
++ printk(KERN_ERR "SMP mptable: null local APIC address!\n");
++ return 0;
++ }
++ memcpy(oem,mpc->mpc_oem,8);
++ oem[8]=0;
++ printk(KERN_INFO "OEM ID: %s ",oem);
++
++ memcpy(str,mpc->mpc_productid,12);
++ str[12]=0;
++ printk("Product ID: %s ",str);
++
++ mps_oem_check(mpc, oem, str);
++
++ printk("APIC at: 0x%lX\n",mpc->mpc_lapic);
++
++ /*
++ * Save the local APIC address (it might be non-default) -- but only
++ * if we're not using ACPI.
++ */
++ if (!acpi_lapic)
++ mp_lapic_addr = mpc->mpc_lapic;
++
++ /*
++ * Now process the configuration blocks.
++ */
++ mpc_record = 0;
++ while (count < mpc->mpc_length) {
++ switch(*mpt) {
++ case MP_PROCESSOR:
++ {
++ struct mpc_config_processor *m=
++ (struct mpc_config_processor *)mpt;
++ /* ACPI may have already provided this data */
++ if (!acpi_lapic)
++ MP_processor_info(m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ case MP_BUS:
++ {
++ struct mpc_config_bus *m=
++ (struct mpc_config_bus *)mpt;
++ MP_bus_info(m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ case MP_IOAPIC:
++ {
++ struct mpc_config_ioapic *m=
++ (struct mpc_config_ioapic *)mpt;
++ MP_ioapic_info(m);
++ mpt+=sizeof(*m);
++ count+=sizeof(*m);
++ break;
++ }
++ case MP_INTSRC:
++ {
++ struct mpc_config_intsrc *m=
++ (struct mpc_config_intsrc *)mpt;
++
++ MP_intsrc_info(m);
++ mpt+=sizeof(*m);
++ count+=sizeof(*m);
++ break;
++ }
++ case MP_LINTSRC:
++ {
++ struct mpc_config_lintsrc *m=
++ (struct mpc_config_lintsrc *)mpt;
++ MP_lintsrc_info(m);
++ mpt+=sizeof(*m);
++ count+=sizeof(*m);
++ break;
++ }
++ default:
++ {
++ count = mpc->mpc_length;
++ break;
++ }
++ }
++ ++mpc_record;
++ }
++ clustered_apic_check();
++ if (!num_processors)
++ printk(KERN_ERR "SMP mptable: no processors registered!\n");
++ return num_processors;
++}
++
++static int __init ELCR_trigger(unsigned int irq)
++{
++ unsigned int port;
++
++ port = 0x4d0 + (irq >> 3);
++ return (inb(port) >> (irq & 7)) & 1;
++}
++
++static void __init construct_default_ioirq_mptable(int mpc_default_type)
++{
++ struct mpc_config_intsrc intsrc;
++ int i;
++ int ELCR_fallback = 0;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqflag = 0; /* conforming */
++ intsrc.mpc_srcbus = 0;
++ intsrc.mpc_dstapic = mp_ioapics[0].mpc_apicid;
++
++ intsrc.mpc_irqtype = mp_INT;
++
++ /*
++ * If true, we have an ISA/PCI system with no IRQ entries
++ * in the MP table. To prevent the PCI interrupts from being set up
++ * incorrectly, we try to use the ELCR. The sanity check to see if
++ * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
++ * never be level sensitive, so we simply see if the ELCR agrees.
++ * If it does, we assume it's valid.
++ */
++ if (mpc_default_type == 5) {
++ printk(KERN_INFO "ISA/PCI bus type with no IRQ information... falling back to ELCR\n");
++
++ if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) || ELCR_trigger(13))
++ printk(KERN_WARNING "ELCR contains invalid data... not using ELCR\n");
++ else {
++ printk(KERN_INFO "Using ELCR to identify PCI interrupts\n");
++ ELCR_fallback = 1;
++ }
++ }
++
++ for (i = 0; i < 16; i++) {
++ switch (mpc_default_type) {
++ case 2:
++ if (i == 0 || i == 13)
++ continue; /* IRQ0 & IRQ13 not connected */
++ /* fall through */
++ default:
++ if (i == 2)
++ continue; /* IRQ2 is never connected */
++ }
++
++ if (ELCR_fallback) {
++ /*
++ * If the ELCR indicates a level-sensitive interrupt, we
++ * copy that information over to the MP table in the
++ * irqflag field (level sensitive, active high polarity).
++ */
++ if (ELCR_trigger(i))
++ intsrc.mpc_irqflag = 13;
++ else
++ intsrc.mpc_irqflag = 0;
++ }
++
++ intsrc.mpc_srcbusirq = i;
++ intsrc.mpc_dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
++ MP_intsrc_info(&intsrc);
++ }
++
++ intsrc.mpc_irqtype = mp_ExtINT;
++ intsrc.mpc_srcbusirq = 0;
++ intsrc.mpc_dstirq = 0; /* 8259A to INTIN0 */
++ MP_intsrc_info(&intsrc);
++}
++
++static inline void __init construct_default_ISA_mptable(int mpc_default_type)
++{
++ struct mpc_config_processor processor;
++ struct mpc_config_bus bus;
++ struct mpc_config_ioapic ioapic;
++ struct mpc_config_lintsrc lintsrc;
++ int linttypes[2] = { mp_ExtINT, mp_NMI };
++ int i;
++
++ /*
++ * local APIC has default address
++ */
++ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
++
++ /*
++ * 2 CPUs, numbered 0 & 1.
++ */
++ processor.mpc_type = MP_PROCESSOR;
++ /* Either an integrated APIC or a discrete 82489DX. */
++ processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ processor.mpc_cpuflag = CPU_ENABLED;
++ processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
++ (boot_cpu_data.x86_model << 4) |
++ boot_cpu_data.x86_mask;
++ processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
++ processor.mpc_reserved[0] = 0;
++ processor.mpc_reserved[1] = 0;
++ for (i = 0; i < 2; i++) {
++ processor.mpc_apicid = i;
++ MP_processor_info(&processor);
++ }
++
++ bus.mpc_type = MP_BUS;
++ bus.mpc_busid = 0;
++ switch (mpc_default_type) {
++ default:
++ printk("???\n");
++ printk(KERN_ERR "Unknown standard configuration %d\n",
++ mpc_default_type);
++ /* fall through */
++ case 1:
++ case 5:
++ memcpy(bus.mpc_bustype, "ISA ", 6);
++ break;
++ case 2:
++ case 6:
++ case 3:
++ memcpy(bus.mpc_bustype, "EISA ", 6);
++ break;
++ case 4:
++ case 7:
++ memcpy(bus.mpc_bustype, "MCA ", 6);
++ }
++ MP_bus_info(&bus);
++ if (mpc_default_type > 4) {
++ bus.mpc_busid = 1;
++ memcpy(bus.mpc_bustype, "PCI ", 6);
++ MP_bus_info(&bus);
++ }
++
++ ioapic.mpc_type = MP_IOAPIC;
++ ioapic.mpc_apicid = 2;
++ ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ ioapic.mpc_flags = MPC_APIC_USABLE;
++ ioapic.mpc_apicaddr = 0xFEC00000;
++ MP_ioapic_info(&ioapic);
++
++ /*
++ * We set up most of the low 16 IO-APIC pins according to MPS rules.
++ */
++ construct_default_ioirq_mptable(mpc_default_type);
++
++ lintsrc.mpc_type = MP_LINTSRC;
++ lintsrc.mpc_irqflag = 0; /* conforming */
++ lintsrc.mpc_srcbusid = 0;
++ lintsrc.mpc_srcbusirq = 0;
++ lintsrc.mpc_destapic = MP_APIC_ALL;
++ for (i = 0; i < 2; i++) {
++ lintsrc.mpc_irqtype = linttypes[i];
++ lintsrc.mpc_destapiclint = i;
++ MP_lintsrc_info(&lintsrc);
++ }
++}
++
++static struct intel_mp_floating *mpf_found;
++
++/*
++ * Scan the memory blocks for an SMP configuration block.
++ */
++void __init get_smp_config (void)
++{
++ struct intel_mp_floating *mpf = mpf_found;
++
++ /*
++ * ACPI supports both logical (e.g. Hyper-Threading) and physical
++ * processors, where MPS only supports physical.
++ */
++ if (acpi_lapic && acpi_ioapic) {
++ printk(KERN_INFO "Using ACPI (MADT) for SMP configuration information\n");
++ return;
++ }
++ else if (acpi_lapic)
++ printk(KERN_INFO "Using ACPI for processor (LAPIC) configuration information\n");
++
++ printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n", mpf->mpf_specification);
++ if (mpf->mpf_feature2 & (1<<7)) {
++ printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
++ pic_mode = 1;
++ } else {
++ printk(KERN_INFO " Virtual Wire compatibility mode.\n");
++ pic_mode = 0;
++ }
++
++ /*
++ * Now see if we need to read further.
++ */
++ if (mpf->mpf_feature1 != 0) {
++
++ printk(KERN_INFO "Default MP configuration #%d\n", mpf->mpf_feature1);
++ construct_default_ISA_mptable(mpf->mpf_feature1);
++
++ } else if (mpf->mpf_physptr) {
++
++ /*
++ * Read the physical hardware table. Anything here will
++ * override the defaults.
++ */
++ if (!smp_read_mpc(isa_bus_to_virt(mpf->mpf_physptr))) {
++ smp_found_config = 0;
++ printk(KERN_ERR "BIOS bug, MP table errors detected!...\n");
++ printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
++ return;
++ }
++ /*
++ * If there are no explicit MP IRQ entries, then we are
++ * broken. We set up most of the low 16 IO-APIC pins to
++ * ISA defaults and hope it will work.
++ */
++ if (!mp_irq_entries) {
++ struct mpc_config_bus bus;
++
++ printk(KERN_ERR "BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n");
++
++ bus.mpc_type = MP_BUS;
++ bus.mpc_busid = 0;
++ memcpy(bus.mpc_bustype, "ISA ", 6);
++ MP_bus_info(&bus);
++
++ construct_default_ioirq_mptable(0);
++ }
++
++ } else
++ BUG();
++
++ printk(KERN_INFO "Processors: %d\n", num_processors);
++ /*
++ * Only use the first configuration found.
++ */
++}
++
++static int __init smp_scan_config (unsigned long base, unsigned long length)
++{
++ unsigned long *bp = isa_bus_to_virt(base);
++ struct intel_mp_floating *mpf;
++
++ Dprintk("Scan SMP from %p for %ld bytes.\n", bp,length);
++ if (sizeof(*mpf) != 16)
++ printk("Error: MPF size\n");
++
++ while (length > 0) {
++ mpf = (struct intel_mp_floating *)bp;
++ if ((*bp == SMP_MAGIC_IDENT) &&
++ (mpf->mpf_length == 1) &&
++ !mpf_checksum((unsigned char *)bp, 16) &&
++ ((mpf->mpf_specification == 1)
++ || (mpf->mpf_specification == 4)) ) {
++
++ smp_found_config = 1;
++#ifndef CONFIG_XEN
++ printk(KERN_INFO "found SMP MP-table at %08lx\n",
++ virt_to_phys(mpf));
++ reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE);
++ if (mpf->mpf_physptr) {
++ /*
++ * We cannot access to MPC table to compute
++ * table size yet, as only few megabytes from
++ * the bottom is mapped now.
++ * PC-9800's MPC table places on the very last
++ * of physical memory; so that simply reserving
++ * PAGE_SIZE from mpg->mpf_physptr yields BUG()
++ * in reserve_bootmem.
++ */
++ unsigned long size = PAGE_SIZE;
++ unsigned long end = max_low_pfn * PAGE_SIZE;
++ if (mpf->mpf_physptr + size > end)
++ size = end - mpf->mpf_physptr;
++ reserve_bootmem(mpf->mpf_physptr, size);
++ }
++#else
++ printk(KERN_INFO "found SMP MP-table at %08lx\n",
++ ((unsigned long)bp - (unsigned long)isa_bus_to_virt(base)) + base);
++#endif
++
++ mpf_found = mpf;
++ return 1;
++ }
++ bp += 4;
++ length -= 16;
++ }
++ return 0;
++}
++
++void __init find_smp_config (void)
++{
++#ifndef CONFIG_XEN
++ unsigned int address;
++#endif
++
++ /*
++ * FIXME: Linux assumes you have 640K of base ram..
++ * this continues the error...
++ *
++ * 1) Scan the bottom 1K for a signature
++ * 2) Scan the top 1K of base RAM
++ * 3) Scan the 64K of bios
++ */
++ if (smp_scan_config(0x0,0x400) ||
++ smp_scan_config(639*0x400,0x400) ||
++ smp_scan_config(0xF0000,0x10000))
++ return;
++ /*
++ * If it is an SMP machine we should know now, unless the
++ * configuration is in an EISA/MCA bus machine with an
++ * extended bios data area.
++ *
++ * there is a real-mode segmented pointer pointing to the
++ * 4K EBDA area at 0x40E, calculate and scan it here.
++ *
++ * NOTE! There are Linux loaders that will corrupt the EBDA
++ * area, and as such this kind of SMP config may be less
++ * trustworthy, simply because the SMP table may have been
++ * stomped on during early boot. These loaders are buggy and
++ * should be fixed.
++ *
++ * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
++ */
++
++#ifndef CONFIG_XEN
++ address = get_bios_ebda();
++ if (address)
++ smp_scan_config(address, 0x400);
++#endif
++}
++
++int es7000_plat;
++
++/* --------------------------------------------------------------------------
++ ACPI-based MP Configuration
++ -------------------------------------------------------------------------- */
++
++#ifdef CONFIG_ACPI
++
++void __init mp_register_lapic_address (
++ u64 address)
++{
++#ifndef CONFIG_XEN
++ mp_lapic_addr = (unsigned long) address;
++
++ set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
++
++ if (boot_cpu_physical_apicid == -1U)
++ boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
++
++ Dprintk("Boot CPU = %d\n", boot_cpu_physical_apicid);
++#endif
++}
++
++
++void __devinit mp_register_lapic (
++ u8 id,
++ u8 enabled)
++{
++ struct mpc_config_processor processor;
++ int boot_cpu = 0;
++
++ if (MAX_APICS - id <= 0) {
++ printk(KERN_WARNING "Processor #%d invalid (max %d)\n",
++ id, MAX_APICS);
++ return;
++ }
++
++ if (id == boot_cpu_physical_apicid)
++ boot_cpu = 1;
++
++#ifndef CONFIG_XEN
++ processor.mpc_type = MP_PROCESSOR;
++ processor.mpc_apicid = id;
++ processor.mpc_apicver = GET_APIC_VERSION(apic_read(APIC_LVR));
++ processor.mpc_cpuflag = (enabled ? CPU_ENABLED : 0);
++ processor.mpc_cpuflag |= (boot_cpu ? CPU_BOOTPROCESSOR : 0);
++ processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
++ (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
++ processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
++ processor.mpc_reserved[0] = 0;
++ processor.mpc_reserved[1] = 0;
++#endif
++
++ MP_processor_info(&processor);
++}
++
++#ifdef CONFIG_X86_IO_APIC
++
++#define MP_ISA_BUS 0
++#define MP_MAX_IOAPIC_PIN 127
++
++static struct mp_ioapic_routing {
++ int apic_id;
++ int gsi_base;
++ int gsi_end;
++ u32 pin_programmed[4];
++} mp_ioapic_routing[MAX_IO_APICS];
++
++
++static int mp_find_ioapic (
++ int gsi)
++{
++ int i = 0;
++
++ /* Find the IOAPIC that manages this GSI. */
++ for (i = 0; i < nr_ioapics; i++) {
++ if ((gsi >= mp_ioapic_routing[i].gsi_base)
++ && (gsi <= mp_ioapic_routing[i].gsi_end))
++ return i;
++ }
++
++ printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
++
++ return -1;
++}
++
++
++void __init mp_register_ioapic (
++ u8 id,
++ u32 address,
++ u32 gsi_base)
++{
++ int idx = 0;
++ int tmpid;
++
++ if (nr_ioapics >= MAX_IO_APICS) {
++ printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
++ "(found %d)\n", MAX_IO_APICS, nr_ioapics);
++ panic("Recompile kernel with bigger MAX_IO_APICS!\n");
++ }
++ if (!address) {
++ printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
++ " found in MADT table, skipping!\n");
++ return;
++ }
++
++ idx = nr_ioapics++;
++
++ mp_ioapics[idx].mpc_type = MP_IOAPIC;
++ mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
++ mp_ioapics[idx].mpc_apicaddr = address;
++
++#ifndef CONFIG_XEN
++ set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
++#endif
++ if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
++ && !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
++ tmpid = io_apic_get_unique_id(idx, id);
++ else
++ tmpid = id;
++ if (tmpid == -1) {
++ nr_ioapics--;
++ return;
++ }
++ mp_ioapics[idx].mpc_apicid = tmpid;
++ mp_ioapics[idx].mpc_apicver = io_apic_get_version(idx);
++
++ /*
++ * Build basic GSI lookup table to facilitate gsi->io_apic lookups
++ * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
++ */
++ mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid;
++ mp_ioapic_routing[idx].gsi_base = gsi_base;
++ mp_ioapic_routing[idx].gsi_end = gsi_base +
++ io_apic_get_redir_entries(idx);
++
++ printk("IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
++ "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
++ mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
++ mp_ioapic_routing[idx].gsi_base,
++ mp_ioapic_routing[idx].gsi_end);
++
++ return;
++}
++
++
++void __init mp_override_legacy_irq (
++ u8 bus_irq,
++ u8 polarity,
++ u8 trigger,
++ u32 gsi)
++{
++ struct mpc_config_intsrc intsrc;
++ int ioapic = -1;
++ int pin = -1;
++
++ /*
++ * Convert 'gsi' to 'ioapic.pin'.
++ */
++ ioapic = mp_find_ioapic(gsi);
++ if (ioapic < 0)
++ return;
++ pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
++
++ /*
++ * TBD: This check is for faulty timer entries, where the override
++ * erroneously sets the trigger to level, resulting in a HUGE
++ * increase of timer interrupts!
++ */
++ if ((bus_irq == 0) && (trigger == 3))
++ trigger = 1;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqtype = mp_INT;
++ intsrc.mpc_irqflag = (trigger << 2) | polarity;
++ intsrc.mpc_srcbus = MP_ISA_BUS;
++ intsrc.mpc_srcbusirq = bus_irq; /* IRQ */
++ intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; /* APIC ID */
++ intsrc.mpc_dstirq = pin; /* INTIN# */
++
++ Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, %d-%d\n",
++ intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
++ (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
++ intsrc.mpc_srcbusirq, intsrc.mpc_dstapic, intsrc.mpc_dstirq);
++
++ mp_irqs[mp_irq_entries] = intsrc;
++ if (++mp_irq_entries == MAX_IRQ_SOURCES)
++ panic("Max # of irq sources exceeded!\n");
++
++ return;
++}
++
++void __init mp_config_acpi_legacy_irqs (void)
++{
++ struct mpc_config_intsrc intsrc;
++ int i = 0;
++ int ioapic = -1;
++
++ /*
++ * Fabricate the legacy ISA bus (bus #31).
++ */
++ mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
++ Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
++
++ /*
++ * Older generations of ES7000 have no legacy identity mappings
++ */
++ if (es7000_plat == 1)
++ return;
++
++ /*
++ * Locate the IOAPIC that manages the ISA IRQs (0-15).
++ */
++ ioapic = mp_find_ioapic(0);
++ if (ioapic < 0)
++ return;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqflag = 0; /* Conforming */
++ intsrc.mpc_srcbus = MP_ISA_BUS;
++ intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid;
++
++ /*
++ * Use the default configuration for the IRQs 0-15. Unless
++ * overriden by (MADT) interrupt source override entries.
++ */
++ for (i = 0; i < 16; i++) {
++ int idx;
++
++ for (idx = 0; idx < mp_irq_entries; idx++) {
++ struct mpc_config_intsrc *irq = mp_irqs + idx;
++
++ /* Do we already have a mapping for this ISA IRQ? */
++ if (irq->mpc_srcbus == MP_ISA_BUS && irq->mpc_srcbusirq == i)
++ break;
++
++ /* Do we already have a mapping for this IOAPIC pin */
++ if ((irq->mpc_dstapic == intsrc.mpc_dstapic) &&
++ (irq->mpc_dstirq == i))
++ break;
++ }
++
++ if (idx != mp_irq_entries) {
++ printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
++ continue; /* IRQ already used */
++ }
++
++ intsrc.mpc_irqtype = mp_INT;
++ intsrc.mpc_srcbusirq = i; /* Identity mapped */
++ intsrc.mpc_dstirq = i;
++
++ Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, "
++ "%d-%d\n", intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
++ (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
++ intsrc.mpc_srcbusirq, intsrc.mpc_dstapic,
++ intsrc.mpc_dstirq);
++
++ mp_irqs[mp_irq_entries] = intsrc;
++ if (++mp_irq_entries == MAX_IRQ_SOURCES)
++ panic("Max # of irq sources exceeded!\n");
++ }
++}
++
++#define MAX_GSI_NUM 4096
++
++int mp_register_gsi (u32 gsi, int triggering, int polarity)
++{
++ int ioapic = -1;
++ int ioapic_pin = 0;
++ int idx, bit = 0;
++ static int pci_irq = 16;
++ /*
++ * Mapping between Global System Interrups, which
++ * represent all possible interrupts, and IRQs
++ * assigned to actual devices.
++ */
++ static int gsi_to_irq[MAX_GSI_NUM];
++
++ /* Don't set up the ACPI SCI because it's already set up */
++ if (acpi_fadt.sci_int == gsi)
++ return gsi;
++
++ ioapic = mp_find_ioapic(gsi);
++ if (ioapic < 0) {
++ printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
++ return gsi;
++ }
++
++ ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
++
++ if (ioapic_renumber_irq)
++ gsi = ioapic_renumber_irq(ioapic, gsi);
++
++ /*
++ * Avoid pin reprogramming. PRTs typically include entries
++ * with redundant pin->gsi mappings (but unique PCI devices);
++ * we only program the IOAPIC on the first.
++ */
++ bit = ioapic_pin % 32;
++ idx = (ioapic_pin < 32) ? 0 : (ioapic_pin / 32);
++ if (idx > 3) {
++ printk(KERN_ERR "Invalid reference to IOAPIC pin "
++ "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
++ ioapic_pin);
++ return gsi;
++ }
++ if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
++ Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
++ mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
++ return gsi_to_irq[gsi];
++ }
++
++ mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit);
++
++ if (triggering == ACPI_LEVEL_SENSITIVE) {
++ /*
++ * For PCI devices assign IRQs in order, avoiding gaps
++ * due to unused I/O APIC pins.
++ */
++ int irq = gsi;
++ if (gsi < MAX_GSI_NUM) {
++ /*
++ * Retain the VIA chipset work-around (gsi > 15), but
++ * avoid a problem where the 8254 timer (IRQ0) is setup
++ * via an override (so it's not on pin 0 of the ioapic),
++ * and at the same time, the pin 0 interrupt is a PCI
++ * type. The gsi > 15 test could cause these two pins
++ * to be shared as IRQ0, and they are not shareable.
++ * So test for this condition, and if necessary, avoid
++ * the pin collision.
++ */
++ if (gsi > 15 || (gsi == 0 && !timer_uses_ioapic_pin_0))
++ gsi = pci_irq++;
++ /*
++ * Don't assign IRQ used by ACPI SCI
++ */
++ if (gsi == acpi_fadt.sci_int)
++ gsi = pci_irq++;
++ gsi_to_irq[irq] = gsi;
++ } else {
++ printk(KERN_ERR "GSI %u is too high\n", gsi);
++ return gsi;
++ }
++ }
++
++ io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
++ triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
++ polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
++ return gsi;
++}
++
++#endif /* CONFIG_X86_IO_APIC */
++#endif /* CONFIG_ACPI */
+Index: head-2008-11-25/arch/x86/kernel/pci-dma-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/pci-dma-xen.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,409 @@
++/*
++ * Dynamic DMA mapping support.
++ *
++ * On i386 there is no hardware dynamic DMA address translation,
++ * so consistent alloc/free are merely page allocation/freeing.
++ * The rest of the dynamic DMA mapping interface is implemented
++ * in asm/pci.h.
++ */
++
++#include <linux/types.h>
++#include <linux/mm.h>
++#include <linux/string.h>
++#include <linux/pci.h>
++#include <linux/module.h>
++#include <linux/version.h>
++#include <asm/io.h>
++#include <xen/balloon.h>
++#include <xen/gnttab.h>
++#include <asm/swiotlb.h>
++#include <asm/tlbflush.h>
++#include <asm-i386/mach-xen/asm/swiotlb.h>
++#include <asm-i386/mach-xen/asm/gnttab_dma.h>
++#include <asm/bug.h>
++
++#ifdef __x86_64__
++#include <asm/proto.h>
++
++int iommu_merge __read_mostly = 0;
++EXPORT_SYMBOL(iommu_merge);
++
++dma_addr_t bad_dma_address __read_mostly;
++EXPORT_SYMBOL(bad_dma_address);
++
++/* This tells the BIO block layer to assume merging. Default to off
++ because we cannot guarantee merging later. */
++int iommu_bio_merge __read_mostly = 0;
++EXPORT_SYMBOL(iommu_bio_merge);
++
++int force_iommu __read_mostly= 0;
++
++__init int iommu_setup(char *p)
++{
++ return 1;
++}
++
++void __init pci_iommu_alloc(void)
++{
++#ifdef CONFIG_SWIOTLB
++ pci_swiotlb_init();
++#endif
++}
++
++static int __init pci_iommu_init(void)
++{
++ no_iommu_init();
++ return 0;
++}
++
++/* Must execute after PCI subsystem */
++fs_initcall(pci_iommu_init);
++#endif
++
++struct dma_coherent_mem {
++ void *virt_base;
++ u32 device_base;
++ int size;
++ int flags;
++ unsigned long *bitmap;
++};
++
++#define IOMMU_BUG_ON(test) \
++do { \
++ if (unlikely(test)) { \
++ printk(KERN_ALERT "Fatal DMA error! " \
++ "Please use 'swiotlb=force'\n"); \
++ BUG(); \
++ } \
++} while (0)
++
++static int check_pages_physically_contiguous(unsigned long pfn,
++ unsigned int offset,
++ size_t length)
++{
++ unsigned long next_mfn;
++ int i;
++ int nr_pages;
++
++ next_mfn = pfn_to_mfn(pfn);
++ nr_pages = (offset + length + PAGE_SIZE-1) >> PAGE_SHIFT;
++
++ for (i = 1; i < nr_pages; i++) {
++ if (pfn_to_mfn(++pfn) != ++next_mfn)
++ return 0;
++ }
++ return 1;
++}
++
++int range_straddles_page_boundary(paddr_t p, size_t size)
++{
++ unsigned long pfn = p >> PAGE_SHIFT;
++ unsigned int offset = p & ~PAGE_MASK;
++
++ return ((offset + size > PAGE_SIZE) &&
++ !check_pages_physically_contiguous(pfn, offset, size));
++}
++
++int
++dma_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
++ enum dma_data_direction direction)
++{
++ int i, rc;
++
++ if (direction == DMA_NONE)
++ BUG();
++ WARN_ON(nents == 0 || sg[0].length == 0);
++
++ if (swiotlb) {
++ rc = swiotlb_map_sg(hwdev, sg, nents, direction);
++ } else {
++ for (i = 0; i < nents; i++ ) {
++ BUG_ON(!sg[i].page);
++ sg[i].dma_address =
++ gnttab_dma_map_page(sg[i].page) + sg[i].offset;
++ sg[i].dma_length = sg[i].length;
++ IOMMU_BUG_ON(address_needs_mapping(
++ hwdev, sg[i].dma_address));
++ IOMMU_BUG_ON(range_straddles_page_boundary(
++ page_to_pseudophys(sg[i].page) + sg[i].offset,
++ sg[i].length));
++ }
++ rc = nents;
++ }
++
++ flush_write_buffers();
++ return rc;
++}
++EXPORT_SYMBOL(dma_map_sg);
++
++void
++dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
++ enum dma_data_direction direction)
++{
++ int i;
++
++ BUG_ON(direction == DMA_NONE);
++ if (swiotlb)
++ swiotlb_unmap_sg(hwdev, sg, nents, direction);
++ else {
++ for (i = 0; i < nents; i++ )
++ gnttab_dma_unmap_page(sg[i].dma_address);
++ }
++}
++EXPORT_SYMBOL(dma_unmap_sg);
++
++#ifdef CONFIG_HIGHMEM
++dma_addr_t
++dma_map_page(struct device *dev, struct page *page, unsigned long offset,
++ size_t size, enum dma_data_direction direction)
++{
++ dma_addr_t dma_addr;
++
++ BUG_ON(direction == DMA_NONE);
++
++ if (swiotlb) {
++ dma_addr = swiotlb_map_page(
++ dev, page, offset, size, direction);
++ } else {
++ dma_addr = gnttab_dma_map_page(page) + offset;
++ IOMMU_BUG_ON(address_needs_mapping(dev, dma_addr));
++ }
++
++ return dma_addr;
++}
++EXPORT_SYMBOL(dma_map_page);
++
++void
++dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
++ enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++ if (swiotlb)
++ swiotlb_unmap_page(dev, dma_address, size, direction);
++ else
++ gnttab_dma_unmap_page(dma_address);
++}
++EXPORT_SYMBOL(dma_unmap_page);
++#endif /* CONFIG_HIGHMEM */
++
++int
++dma_mapping_error(dma_addr_t dma_addr)
++{
++ if (swiotlb)
++ return swiotlb_dma_mapping_error(dma_addr);
++ return 0;
++}
++EXPORT_SYMBOL(dma_mapping_error);
++
++int
++dma_supported(struct device *dev, u64 mask)
++{
++ if (swiotlb)
++ return swiotlb_dma_supported(dev, mask);
++ /*
++ * By default we'll BUG when an infeasible DMA is requested, and
++ * request swiotlb=force (see IOMMU_BUG_ON).
++ */
++ return 1;
++}
++EXPORT_SYMBOL(dma_supported);
++
++void *dma_alloc_coherent(struct device *dev, size_t size,
++ dma_addr_t *dma_handle, gfp_t gfp)
++{
++ void *ret;
++ struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
++ unsigned int order = get_order(size);
++ unsigned long vstart;
++ u64 mask;
++
++ /* ignore region specifiers */
++ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
++
++ if (mem) {
++ int page = bitmap_find_free_region(mem->bitmap, mem->size,
++ order);
++ if (page >= 0) {
++ *dma_handle = mem->device_base + (page << PAGE_SHIFT);
++ ret = mem->virt_base + (page << PAGE_SHIFT);
++ memset(ret, 0, size);
++ return ret;
++ }
++ if (mem->flags & DMA_MEMORY_EXCLUSIVE)
++ return NULL;
++ }
++
++ if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
++ gfp |= GFP_DMA;
++
++ vstart = __get_free_pages(gfp, order);
++ ret = (void *)vstart;
++
++ if (dev != NULL && dev->coherent_dma_mask)
++ mask = dev->coherent_dma_mask;
++ else
++ mask = 0xffffffff;
++
++ if (ret != NULL) {
++ if (xen_create_contiguous_region(vstart, order,
++ fls64(mask)) != 0) {
++ free_pages(vstart, order);
++ return NULL;
++ }
++ memset(ret, 0, size);
++ *dma_handle = virt_to_bus(ret);
++ }
++ return ret;
++}
++EXPORT_SYMBOL(dma_alloc_coherent);
++
++void dma_free_coherent(struct device *dev, size_t size,
++ void *vaddr, dma_addr_t dma_handle)
++{
++ struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
++ int order = get_order(size);
++
++ if (mem && vaddr >= mem->virt_base && vaddr < (mem->virt_base + (mem->size << PAGE_SHIFT))) {
++ int page = (vaddr - mem->virt_base) >> PAGE_SHIFT;
++
++ bitmap_release_region(mem->bitmap, page, order);
++ } else {
++ xen_destroy_contiguous_region((unsigned long)vaddr, order);
++ free_pages((unsigned long)vaddr, order);
++ }
++}
++EXPORT_SYMBOL(dma_free_coherent);
++
++#ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
++int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
++ dma_addr_t device_addr, size_t size, int flags)
++{
++ void __iomem *mem_base;
++ int pages = size >> PAGE_SHIFT;
++ int bitmap_size = (pages + 31)/32;
++
++ if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0)
++ goto out;
++ if (!size)
++ goto out;
++ if (dev->dma_mem)
++ goto out;
++
++ /* FIXME: this routine just ignores DMA_MEMORY_INCLUDES_CHILDREN */
++
++ mem_base = ioremap(bus_addr, size);
++ if (!mem_base)
++ goto out;
++
++ dev->dma_mem = kmalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL);
++ if (!dev->dma_mem)
++ goto out;
++ memset(dev->dma_mem, 0, sizeof(struct dma_coherent_mem));
++ dev->dma_mem->bitmap = kmalloc(bitmap_size, GFP_KERNEL);
++ if (!dev->dma_mem->bitmap)
++ goto free1_out;
++ memset(dev->dma_mem->bitmap, 0, bitmap_size);
++
++ dev->dma_mem->virt_base = mem_base;
++ dev->dma_mem->device_base = device_addr;
++ dev->dma_mem->size = pages;
++ dev->dma_mem->flags = flags;
++
++ if (flags & DMA_MEMORY_MAP)
++ return DMA_MEMORY_MAP;
++
++ return DMA_MEMORY_IO;
++
++ free1_out:
++ kfree(dev->dma_mem->bitmap);
++ out:
++ return 0;
++}
++EXPORT_SYMBOL(dma_declare_coherent_memory);
++
++void dma_release_declared_memory(struct device *dev)
++{
++ struct dma_coherent_mem *mem = dev->dma_mem;
++
++ if(!mem)
++ return;
++ dev->dma_mem = NULL;
++ iounmap(mem->virt_base);
++ kfree(mem->bitmap);
++ kfree(mem);
++}
++EXPORT_SYMBOL(dma_release_declared_memory);
++
++void *dma_mark_declared_memory_occupied(struct device *dev,
++ dma_addr_t device_addr, size_t size)
++{
++ struct dma_coherent_mem *mem = dev->dma_mem;
++ int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1) >> PAGE_SHIFT;
++ int pos, err;
++
++ if (!mem)
++ return ERR_PTR(-EINVAL);
++
++ pos = (device_addr - mem->device_base) >> PAGE_SHIFT;
++ err = bitmap_allocate_region(mem->bitmap, pos, get_order(pages));
++ if (err != 0)
++ return ERR_PTR(err);
++ return mem->virt_base + (pos << PAGE_SHIFT);
++}
++EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
++#endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
++
++dma_addr_t
++dma_map_single(struct device *dev, void *ptr, size_t size,
++ enum dma_data_direction direction)
++{
++ dma_addr_t dma;
++
++ if (direction == DMA_NONE)
++ BUG();
++ WARN_ON(size == 0);
++
++ if (swiotlb) {
++ dma = swiotlb_map_single(dev, ptr, size, direction);
++ } else {
++ dma = gnttab_dma_map_page(virt_to_page(ptr)) +
++ offset_in_page(ptr);
++ IOMMU_BUG_ON(range_straddles_page_boundary(__pa(ptr), size));
++ IOMMU_BUG_ON(address_needs_mapping(dev, dma));
++ }
++
++ flush_write_buffers();
++ return dma;
++}
++EXPORT_SYMBOL(dma_map_single);
++
++void
++dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
++ enum dma_data_direction direction)
++{
++ if (direction == DMA_NONE)
++ BUG();
++ if (swiotlb)
++ swiotlb_unmap_single(dev, dma_addr, size, direction);
++ else
++ gnttab_dma_unmap_page(dma_addr);
++}
++EXPORT_SYMBOL(dma_unmap_single);
++
++void
++dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
++ enum dma_data_direction direction)
++{
++ if (swiotlb)
++ swiotlb_sync_single_for_cpu(dev, dma_handle, size, direction);
++}
++EXPORT_SYMBOL(dma_sync_single_for_cpu);
++
++void
++dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
++ enum dma_data_direction direction)
++{
++ if (swiotlb)
++ swiotlb_sync_single_for_device(dev, dma_handle, size, direction);
++}
++EXPORT_SYMBOL(dma_sync_single_for_device);
+Index: head-2008-11-25/arch/x86/kernel/process_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/process_32-xen.c 2008-07-21 11:00:32.000000000 +0200
+@@ -0,0 +1,877 @@
++/*
++ * linux/arch/i386/kernel/process.c
++ *
++ * Copyright (C) 1995 Linus Torvalds
++ *
++ * Pentium III FXSR, SSE support
++ * Gareth Hughes <gareth@valinux.com>, May 2000
++ */
++
++/*
++ * This file handles the architecture-dependent parts of process handling..
++ */
++
++#include <stdarg.h>
++
++#include <linux/cpu.h>
++#include <linux/errno.h>
++#include <linux/sched.h>
++#include <linux/fs.h>
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <linux/elfcore.h>
++#include <linux/smp.h>
++#include <linux/smp_lock.h>
++#include <linux/stddef.h>
++#include <linux/slab.h>
++#include <linux/vmalloc.h>
++#include <linux/user.h>
++#include <linux/a.out.h>
++#include <linux/interrupt.h>
++#include <linux/utsname.h>
++#include <linux/delay.h>
++#include <linux/reboot.h>
++#include <linux/init.h>
++#include <linux/mc146818rtc.h>
++#include <linux/module.h>
++#include <linux/kallsyms.h>
++#include <linux/ptrace.h>
++#include <linux/random.h>
++
++#include <asm/uaccess.h>
++#include <asm/pgtable.h>
++#include <asm/system.h>
++#include <asm/io.h>
++#include <asm/ldt.h>
++#include <asm/processor.h>
++#include <asm/i387.h>
++#include <asm/desc.h>
++#include <asm/vm86.h>
++#ifdef CONFIG_MATH_EMULATION
++#include <asm/math_emu.h>
++#endif
++
++#include <xen/interface/physdev.h>
++#include <xen/interface/vcpu.h>
++#include <xen/cpu_hotplug.h>
++
++#include <linux/err.h>
++
++#include <asm/tlbflush.h>
++#include <asm/cpu.h>
++
++asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
++
++static int hlt_counter;
++
++unsigned long boot_option_idle_override = 0;
++EXPORT_SYMBOL(boot_option_idle_override);
++
++/*
++ * Return saved PC of a blocked thread.
++ */
++unsigned long thread_saved_pc(struct task_struct *tsk)
++{
++ return ((unsigned long *)tsk->thread.esp)[3];
++}
++
++/*
++ * Powermanagement idle function, if any..
++ */
++void (*pm_idle)(void);
++EXPORT_SYMBOL(pm_idle);
++static DEFINE_PER_CPU(unsigned int, cpu_idle_state);
++
++void disable_hlt(void)
++{
++ hlt_counter++;
++}
++
++EXPORT_SYMBOL(disable_hlt);
++
++void enable_hlt(void)
++{
++ hlt_counter--;
++}
++
++EXPORT_SYMBOL(enable_hlt);
++
++/*
++ * On SMP it's slightly faster (but much more power-consuming!)
++ * to poll the ->work.need_resched flag instead of waiting for the
++ * cross-CPU IPI to arrive. Use this option with caution.
++ */
++static void poll_idle (void)
++{
++ local_irq_enable();
++
++ asm volatile(
++ "2:"
++ "testl %0, %1;"
++ "rep; nop;"
++ "je 2b;"
++ : : "i"(_TIF_NEED_RESCHED), "m" (current_thread_info()->flags));
++}
++
++static void xen_idle(void)
++{
++ local_irq_disable();
++
++ if (need_resched())
++ local_irq_enable();
++ else {
++ current_thread_info()->status &= ~TS_POLLING;
++ smp_mb__after_clear_bit();
++ safe_halt();
++ current_thread_info()->status |= TS_POLLING;
++ }
++}
++#ifdef CONFIG_APM_MODULE
++EXPORT_SYMBOL(default_idle);
++#endif
++
++#ifdef CONFIG_HOTPLUG_CPU
++extern cpumask_t cpu_initialized;
++static inline void play_dead(void)
++{
++ idle_task_exit();
++ local_irq_disable();
++ cpu_clear(smp_processor_id(), cpu_initialized);
++ preempt_enable_no_resched();
++ VOID(HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL));
++ cpu_bringup();
++}
++#else
++static inline void play_dead(void)
++{
++ BUG();
++}
++#endif /* CONFIG_HOTPLUG_CPU */
++
++/*
++ * The idle thread. There's no useful work to be
++ * done, so just try to conserve power and have a
++ * low exit latency (ie sit in a loop waiting for
++ * somebody to say that they'd like to reschedule)
++ */
++void cpu_idle(void)
++{
++ int cpu = smp_processor_id();
++
++ current_thread_info()->status |= TS_POLLING;
++
++ /* endless idle loop with no priority at all */
++ while (1) {
++ while (!need_resched()) {
++ void (*idle)(void);
++
++ if (__get_cpu_var(cpu_idle_state))
++ __get_cpu_var(cpu_idle_state) = 0;
++
++ rmb();
++ idle = xen_idle; /* no alternatives */
++
++ if (cpu_is_offline(cpu))
++ play_dead();
++
++ __get_cpu_var(irq_stat).idle_timestamp = jiffies;
++ idle();
++ }
++ preempt_enable_no_resched();
++ schedule();
++ preempt_disable();
++ }
++}
++
++void cpu_idle_wait(void)
++{
++ unsigned int cpu, this_cpu = get_cpu();
++ cpumask_t map;
++
++ set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
++ put_cpu();
++
++ cpus_clear(map);
++ for_each_online_cpu(cpu) {
++ per_cpu(cpu_idle_state, cpu) = 1;
++ cpu_set(cpu, map);
++ }
++
++ __get_cpu_var(cpu_idle_state) = 0;
++
++ wmb();
++ do {
++ ssleep(1);
++ for_each_online_cpu(cpu) {
++ if (cpu_isset(cpu, map) && !per_cpu(cpu_idle_state, cpu))
++ cpu_clear(cpu, map);
++ }
++ cpus_and(map, map, cpu_online_map);
++ } while (!cpus_empty(map));
++}
++EXPORT_SYMBOL_GPL(cpu_idle_wait);
++
++void __devinit select_idle_routine(const struct cpuinfo_x86 *c)
++{
++}
++
++static int __init idle_setup (char *str)
++{
++ if (!strncmp(str, "poll", 4)) {
++ printk("using polling idle threads.\n");
++ pm_idle = poll_idle;
++ }
++
++ boot_option_idle_override = 1;
++ return 1;
++}
++
++__setup("idle=", idle_setup);
++
++void show_regs(struct pt_regs * regs)
++{
++ unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
++
++ printk("\n");
++ printk("Pid: %d, comm: %20s\n", current->pid, current->comm);
++ printk("EIP: %04x:[<%08lx>] CPU: %d\n",0xffff & regs->xcs,regs->eip, smp_processor_id());
++ print_symbol("EIP is at %s\n", regs->eip);
++
++ if (user_mode_vm(regs))
++ printk(" ESP: %04x:%08lx",0xffff & regs->xss,regs->esp);
++ printk(" EFLAGS: %08lx %s (%s %.*s)\n",
++ regs->eflags, print_tainted(), system_utsname.release,
++ (int)strcspn(system_utsname.version, " "),
++ system_utsname.version);
++ printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
++ regs->eax,regs->ebx,regs->ecx,regs->edx);
++ printk("ESI: %08lx EDI: %08lx EBP: %08lx",
++ regs->esi, regs->edi, regs->ebp);
++ printk(" DS: %04x ES: %04x\n",
++ 0xffff & regs->xds,0xffff & regs->xes);
++
++ cr0 = read_cr0();
++ cr2 = read_cr2();
++ cr3 = read_cr3();
++ cr4 = read_cr4_safe();
++ printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n", cr0, cr2, cr3, cr4);
++ show_trace(NULL, regs, ®s->esp);
++}
++
++/*
++ * This gets run with %ebx containing the
++ * function to call, and %edx containing
++ * the "args".
++ */
++extern void kernel_thread_helper(void);
++__asm__(".section .text\n"
++ ".align 4\n"
++ "kernel_thread_helper:\n\t"
++ "movl %edx,%eax\n\t"
++ "pushl %edx\n\t"
++ "call *%ebx\n\t"
++ "pushl %eax\n\t"
++ "call do_exit\n"
++ ".previous");
++
++/*
++ * Create a kernel thread
++ */
++int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
++{
++ struct pt_regs regs;
++
++ memset(®s, 0, sizeof(regs));
++
++ regs.ebx = (unsigned long) fn;
++ regs.edx = (unsigned long) arg;
++
++ regs.xds = __USER_DS;
++ regs.xes = __USER_DS;
++ regs.orig_eax = -1;
++ regs.eip = (unsigned long) kernel_thread_helper;
++ regs.xcs = GET_KERNEL_CS();
++ regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
++
++ /* Ok, create the new process.. */
++ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL);
++}
++EXPORT_SYMBOL(kernel_thread);
++
++/*
++ * Free current thread data structures etc..
++ */
++void exit_thread(void)
++{
++ /* The process may have allocated an io port bitmap... nuke it. */
++ if (unlikely(test_thread_flag(TIF_IO_BITMAP))) {
++ struct task_struct *tsk = current;
++ struct thread_struct *t = &tsk->thread;
++ struct physdev_set_iobitmap set_iobitmap;
++ memset(&set_iobitmap, 0, sizeof(set_iobitmap));
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap,
++ &set_iobitmap));
++ kfree(t->io_bitmap_ptr);
++ t->io_bitmap_ptr = NULL;
++ clear_thread_flag(TIF_IO_BITMAP);
++ }
++}
++
++void flush_thread(void)
++{
++ struct task_struct *tsk = current;
++
++ memset(tsk->thread.debugreg, 0, sizeof(unsigned long)*8);
++ memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
++ clear_tsk_thread_flag(tsk, TIF_DEBUG);
++ /*
++ * Forget coprocessor state..
++ */
++ clear_fpu(tsk);
++ clear_used_math();
++}
++
++void release_thread(struct task_struct *dead_task)
++{
++ BUG_ON(dead_task->mm);
++ release_vm86_irqs(dead_task);
++}
++
++/*
++ * This gets called before we allocate a new thread and copy
++ * the current task into it.
++ */
++void prepare_to_copy(struct task_struct *tsk)
++{
++ unlazy_fpu(tsk);
++}
++
++int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
++ unsigned long unused,
++ struct task_struct * p, struct pt_regs * regs)
++{
++ struct pt_regs * childregs;
++ struct task_struct *tsk;
++ int err;
++
++ childregs = task_pt_regs(p);
++ *childregs = *regs;
++ childregs->eax = 0;
++ childregs->esp = esp;
++
++ p->thread.esp = (unsigned long) childregs;
++ p->thread.esp0 = (unsigned long) (childregs+1);
++
++ p->thread.eip = (unsigned long) ret_from_fork;
++
++ savesegment(fs,p->thread.fs);
++ savesegment(gs,p->thread.gs);
++
++ tsk = current;
++ if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
++ p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
++ if (!p->thread.io_bitmap_ptr) {
++ p->thread.io_bitmap_max = 0;
++ return -ENOMEM;
++ }
++ memcpy(p->thread.io_bitmap_ptr, tsk->thread.io_bitmap_ptr,
++ IO_BITMAP_BYTES);
++ set_tsk_thread_flag(p, TIF_IO_BITMAP);
++ }
++
++ /*
++ * Set a new TLS for the child thread?
++ */
++ if (clone_flags & CLONE_SETTLS) {
++ struct desc_struct *desc;
++ struct user_desc info;
++ int idx;
++
++ err = -EFAULT;
++ if (copy_from_user(&info, (void __user *)childregs->esi, sizeof(info)))
++ goto out;
++ err = -EINVAL;
++ if (LDT_empty(&info))
++ goto out;
++
++ idx = info.entry_number;
++ if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
++ goto out;
++
++ desc = p->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
++ desc->a = LDT_entry_a(&info);
++ desc->b = LDT_entry_b(&info);
++ }
++
++ p->thread.iopl = current->thread.iopl;
++
++ err = 0;
++ out:
++ if (err && p->thread.io_bitmap_ptr) {
++ kfree(p->thread.io_bitmap_ptr);
++ p->thread.io_bitmap_max = 0;
++ }
++ return err;
++}
++
++/*
++ * fill in the user structure for a core dump..
++ */
++void dump_thread(struct pt_regs * regs, struct user * dump)
++{
++ int i;
++
++/* changed the size calculations - should hopefully work better. lbt */
++ dump->magic = CMAGIC;
++ dump->start_code = 0;
++ dump->start_stack = regs->esp & ~(PAGE_SIZE - 1);
++ dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
++ dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
++ dump->u_dsize -= dump->u_tsize;
++ dump->u_ssize = 0;
++ for (i = 0; i < 8; i++)
++ dump->u_debugreg[i] = current->thread.debugreg[i];
++
++ if (dump->start_stack < TASK_SIZE)
++ dump->u_ssize = ((unsigned long) (TASK_SIZE - dump->start_stack)) >> PAGE_SHIFT;
++
++ dump->regs.ebx = regs->ebx;
++ dump->regs.ecx = regs->ecx;
++ dump->regs.edx = regs->edx;
++ dump->regs.esi = regs->esi;
++ dump->regs.edi = regs->edi;
++ dump->regs.ebp = regs->ebp;
++ dump->regs.eax = regs->eax;
++ dump->regs.ds = regs->xds;
++ dump->regs.es = regs->xes;
++ savesegment(fs,dump->regs.fs);
++ savesegment(gs,dump->regs.gs);
++ dump->regs.orig_eax = regs->orig_eax;
++ dump->regs.eip = regs->eip;
++ dump->regs.cs = regs->xcs;
++ dump->regs.eflags = regs->eflags;
++ dump->regs.esp = regs->esp;
++ dump->regs.ss = regs->xss;
++
++ dump->u_fpvalid = dump_fpu (regs, &dump->i387);
++}
++EXPORT_SYMBOL(dump_thread);
++
++/*
++ * Capture the user space registers if the task is not running (in user space)
++ */
++int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
++{
++ struct pt_regs ptregs = *task_pt_regs(tsk);
++ ptregs.xcs &= 0xffff;
++ ptregs.xds &= 0xffff;
++ ptregs.xes &= 0xffff;
++ ptregs.xss &= 0xffff;
++
++ elf_core_copy_regs(regs, &ptregs);
++
++ return 1;
++}
++
++static noinline void __switch_to_xtra(struct task_struct *next_p)
++{
++ struct thread_struct *next;
++
++ next = &next_p->thread;
++
++ if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
++ set_debugreg(next->debugreg[0], 0);
++ set_debugreg(next->debugreg[1], 1);
++ set_debugreg(next->debugreg[2], 2);
++ set_debugreg(next->debugreg[3], 3);
++ /* no 4 and 5 */
++ set_debugreg(next->debugreg[6], 6);
++ set_debugreg(next->debugreg[7], 7);
++ }
++}
++
++/*
++ * This function selects if the context switch from prev to next
++ * has to tweak the TSC disable bit in the cr4.
++ */
++static inline void disable_tsc(struct task_struct *prev_p,
++ struct task_struct *next_p)
++{
++ struct thread_info *prev, *next;
++
++ /*
++ * gcc should eliminate the ->thread_info dereference if
++ * has_secure_computing returns 0 at compile time (SECCOMP=n).
++ */
++ prev = task_thread_info(prev_p);
++ next = task_thread_info(next_p);
++
++ if (has_secure_computing(prev) || has_secure_computing(next)) {
++ /* slow path here */
++ if (has_secure_computing(prev) &&
++ !has_secure_computing(next)) {
++ write_cr4(read_cr4() & ~X86_CR4_TSD);
++ } else if (!has_secure_computing(prev) &&
++ has_secure_computing(next))
++ write_cr4(read_cr4() | X86_CR4_TSD);
++ }
++}
++
++/*
++ * switch_to(x,yn) should switch tasks from x to y.
++ *
++ * We fsave/fwait so that an exception goes off at the right time
++ * (as a call from the fsave or fwait in effect) rather than to
++ * the wrong process. Lazy FP saving no longer makes any sense
++ * with modern CPU's, and this simplifies a lot of things (SMP
++ * and UP become the same).
++ *
++ * NOTE! We used to use the x86 hardware context switching. The
++ * reason for not using it any more becomes apparent when you
++ * try to recover gracefully from saved state that is no longer
++ * valid (stale segment register values in particular). With the
++ * hardware task-switch, there is no way to fix up bad state in
++ * a reasonable manner.
++ *
++ * The fact that Intel documents the hardware task-switching to
++ * be slow is a fairly red herring - this code is not noticeably
++ * faster. However, there _is_ some room for improvement here,
++ * so the performance issues may eventually be a valid point.
++ * More important, however, is the fact that this allows us much
++ * more flexibility.
++ *
++ * The return value (in %eax) will be the "prev" task after
++ * the task-switch, and shows up in ret_from_fork in entry.S,
++ * for example.
++ */
++struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
++{
++ struct thread_struct *prev = &prev_p->thread,
++ *next = &next_p->thread;
++ int cpu = smp_processor_id();
++#ifndef CONFIG_X86_NO_TSS
++ struct tss_struct *tss = &per_cpu(init_tss, cpu);
++#endif
++#if CONFIG_XEN_COMPAT > 0x030002
++ struct physdev_set_iopl iopl_op;
++ struct physdev_set_iobitmap iobmp_op;
++#else
++ struct physdev_op _pdo[2], *pdo = _pdo;
++#define iopl_op pdo->u.set_iopl
++#define iobmp_op pdo->u.set_iobitmap
++#endif
++ multicall_entry_t _mcl[8], *mcl = _mcl;
++
++ /* XEN NOTE: FS/GS saved in switch_mm(), not here. */
++
++ /*
++ * This is basically '__unlazy_fpu', except that we queue a
++ * multicall to indicate FPU task switch, rather than
++ * synchronously trapping to Xen.
++ */
++ if (prev_p->thread_info->status & TS_USEDFPU) {
++ __save_init_fpu(prev_p); /* _not_ save_init_fpu() */
++ mcl->op = __HYPERVISOR_fpu_taskswitch;
++ mcl->args[0] = 1;
++ mcl++;
++ }
++#if 0 /* lazy fpu sanity check */
++ else BUG_ON(!(read_cr0() & 8));
++#endif
++
++ /*
++ * Reload esp0.
++ * This is load_esp0(tss, next) with a multicall.
++ */
++ mcl->op = __HYPERVISOR_stack_switch;
++ mcl->args[0] = __KERNEL_DS;
++ mcl->args[1] = next->esp0;
++ mcl++;
++
++ /*
++ * Load the per-thread Thread-Local Storage descriptor.
++ * This is load_TLS(next, cpu) with multicalls.
++ */
++#define C(i) do { \
++ if (unlikely(next->tls_array[i].a != prev->tls_array[i].a || \
++ next->tls_array[i].b != prev->tls_array[i].b)) { \
++ mcl->op = __HYPERVISOR_update_descriptor; \
++ *(u64 *)&mcl->args[0] = virt_to_machine( \
++ &get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i]);\
++ *(u64 *)&mcl->args[2] = *(u64 *)&next->tls_array[i]; \
++ mcl++; \
++ } \
++} while (0)
++ C(0); C(1); C(2);
++#undef C
++
++ if (unlikely(prev->iopl != next->iopl)) {
++ iopl_op.iopl = (next->iopl == 0) ? 1 : (next->iopl >> 12) & 3;
++#if CONFIG_XEN_COMPAT > 0x030002
++ mcl->op = __HYPERVISOR_physdev_op;
++ mcl->args[0] = PHYSDEVOP_set_iopl;
++ mcl->args[1] = (unsigned long)&iopl_op;
++#else
++ mcl->op = __HYPERVISOR_physdev_op_compat;
++ pdo->cmd = PHYSDEVOP_set_iopl;
++ mcl->args[0] = (unsigned long)pdo++;
++#endif
++ mcl++;
++ }
++
++ if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr)) {
++ set_xen_guest_handle(iobmp_op.bitmap,
++ (char *)next->io_bitmap_ptr);
++ iobmp_op.nr_ports = next->io_bitmap_ptr ? IO_BITMAP_BITS : 0;
++#if CONFIG_XEN_COMPAT > 0x030002
++ mcl->op = __HYPERVISOR_physdev_op;
++ mcl->args[0] = PHYSDEVOP_set_iobitmap;
++ mcl->args[1] = (unsigned long)&iobmp_op;
++#else
++ mcl->op = __HYPERVISOR_physdev_op_compat;
++ pdo->cmd = PHYSDEVOP_set_iobitmap;
++ mcl->args[0] = (unsigned long)pdo++;
++#endif
++ mcl++;
++ }
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ BUG_ON(pdo > _pdo + ARRAY_SIZE(_pdo));
++#endif
++ BUG_ON(mcl > _mcl + ARRAY_SIZE(_mcl));
++ if (unlikely(HYPERVISOR_multicall_check(_mcl, mcl - _mcl, NULL)))
++ BUG();
++
++ /*
++ * Restore %fs and %gs if needed.
++ *
++ * Glibc normally makes %fs be zero, and %gs is one of
++ * the TLS segments.
++ */
++ if (unlikely(next->fs))
++ loadsegment(fs, next->fs);
++
++ if (next->gs)
++ loadsegment(gs, next->gs);
++
++ /*
++ * Now maybe handle debug registers
++ */
++ if (unlikely(task_thread_info(next_p)->flags & _TIF_WORK_CTXSW))
++ __switch_to_xtra(next_p);
++
++ disable_tsc(prev_p, next_p);
++
++ return prev_p;
++}
++
++asmlinkage int sys_fork(struct pt_regs regs)
++{
++ return do_fork(SIGCHLD, regs.esp, ®s, 0, NULL, NULL);
++}
++
++asmlinkage int sys_clone(struct pt_regs regs)
++{
++ unsigned long clone_flags;
++ unsigned long newsp;
++ int __user *parent_tidptr, *child_tidptr;
++
++ clone_flags = regs.ebx;
++ newsp = regs.ecx;
++ parent_tidptr = (int __user *)regs.edx;
++ child_tidptr = (int __user *)regs.edi;
++ if (!newsp)
++ newsp = regs.esp;
++ return do_fork(clone_flags, newsp, ®s, 0, parent_tidptr, child_tidptr);
++}
++
++/*
++ * This is trivial, and on the face of it looks like it
++ * could equally well be done in user mode.
++ *
++ * Not so, for quite unobvious reasons - register pressure.
++ * In user mode vfork() cannot have a stack frame, and if
++ * done by calling the "clone()" system call directly, you
++ * do not have enough call-clobbered registers to hold all
++ * the information you need.
++ */
++asmlinkage int sys_vfork(struct pt_regs regs)
++{
++ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.esp, ®s, 0, NULL, NULL);
++}
++
++/*
++ * sys_execve() executes a new program.
++ */
++asmlinkage int sys_execve(struct pt_regs regs)
++{
++ int error;
++ char * filename;
++
++ filename = getname((char __user *) regs.ebx);
++ error = PTR_ERR(filename);
++ if (IS_ERR(filename))
++ goto out;
++ error = do_execve(filename,
++ (char __user * __user *) regs.ecx,
++ (char __user * __user *) regs.edx,
++ ®s);
++ if (error == 0) {
++ task_lock(current);
++ current->ptrace &= ~PT_DTRACE;
++ task_unlock(current);
++ /* Make sure we don't return using sysenter.. */
++ set_thread_flag(TIF_IRET);
++ }
++ putname(filename);
++out:
++ return error;
++}
++
++#define top_esp (THREAD_SIZE - sizeof(unsigned long))
++#define top_ebp (THREAD_SIZE - 2*sizeof(unsigned long))
++
++unsigned long get_wchan(struct task_struct *p)
++{
++ unsigned long ebp, esp, eip;
++ unsigned long stack_page;
++ int count = 0;
++ if (!p || p == current || p->state == TASK_RUNNING)
++ return 0;
++ stack_page = (unsigned long)task_stack_page(p);
++ esp = p->thread.esp;
++ if (!stack_page || esp < stack_page || esp > top_esp+stack_page)
++ return 0;
++ /* include/asm-i386/system.h:switch_to() pushes ebp last. */
++ ebp = *(unsigned long *) esp;
++ do {
++ if (ebp < stack_page || ebp > top_ebp+stack_page)
++ return 0;
++ eip = *(unsigned long *) (ebp+4);
++ if (!in_sched_functions(eip))
++ return eip;
++ ebp = *(unsigned long *) ebp;
++ } while (count++ < 16);
++ return 0;
++}
++
++/*
++ * sys_alloc_thread_area: get a yet unused TLS descriptor index.
++ */
++static int get_free_idx(void)
++{
++ struct thread_struct *t = ¤t->thread;
++ int idx;
++
++ for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
++ if (desc_empty(t->tls_array + idx))
++ return idx + GDT_ENTRY_TLS_MIN;
++ return -ESRCH;
++}
++
++/*
++ * Set a given TLS descriptor:
++ */
++asmlinkage int sys_set_thread_area(struct user_desc __user *u_info)
++{
++ struct thread_struct *t = ¤t->thread;
++ struct user_desc info;
++ struct desc_struct *desc;
++ int cpu, idx;
++
++ if (copy_from_user(&info, u_info, sizeof(info)))
++ return -EFAULT;
++ idx = info.entry_number;
++
++ /*
++ * index -1 means the kernel should try to find and
++ * allocate an empty descriptor:
++ */
++ if (idx == -1) {
++ idx = get_free_idx();
++ if (idx < 0)
++ return idx;
++ if (put_user(idx, &u_info->entry_number))
++ return -EFAULT;
++ }
++
++ if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
++ return -EINVAL;
++
++ desc = t->tls_array + idx - GDT_ENTRY_TLS_MIN;
++
++ /*
++ * We must not get preempted while modifying the TLS.
++ */
++ cpu = get_cpu();
++
++ if (LDT_empty(&info)) {
++ desc->a = 0;
++ desc->b = 0;
++ } else {
++ desc->a = LDT_entry_a(&info);
++ desc->b = LDT_entry_b(&info);
++ }
++ load_TLS(t, cpu);
++
++ put_cpu();
++
++ return 0;
++}
++
++/*
++ * Get the current Thread-Local Storage area:
++ */
++
++#define GET_BASE(desc) ( \
++ (((desc)->a >> 16) & 0x0000ffff) | \
++ (((desc)->b << 16) & 0x00ff0000) | \
++ ( (desc)->b & 0xff000000) )
++
++#define GET_LIMIT(desc) ( \
++ ((desc)->a & 0x0ffff) | \
++ ((desc)->b & 0xf0000) )
++
++#define GET_32BIT(desc) (((desc)->b >> 22) & 1)
++#define GET_CONTENTS(desc) (((desc)->b >> 10) & 3)
++#define GET_WRITABLE(desc) (((desc)->b >> 9) & 1)
++#define GET_LIMIT_PAGES(desc) (((desc)->b >> 23) & 1)
++#define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
++#define GET_USEABLE(desc) (((desc)->b >> 20) & 1)
++
++asmlinkage int sys_get_thread_area(struct user_desc __user *u_info)
++{
++ struct user_desc info;
++ struct desc_struct *desc;
++ int idx;
++
++ if (get_user(idx, &u_info->entry_number))
++ return -EFAULT;
++ if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
++ return -EINVAL;
++
++ memset(&info, 0, sizeof(info));
++
++ desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
++
++ info.entry_number = idx;
++ info.base_addr = GET_BASE(desc);
++ info.limit = GET_LIMIT(desc);
++ info.seg_32bit = GET_32BIT(desc);
++ info.contents = GET_CONTENTS(desc);
++ info.read_exec_only = !GET_WRITABLE(desc);
++ info.limit_in_pages = GET_LIMIT_PAGES(desc);
++ info.seg_not_present = !GET_PRESENT(desc);
++ info.useable = GET_USEABLE(desc);
++
++ if (copy_to_user(u_info, &info, sizeof(info)))
++ return -EFAULT;
++ return 0;
++}
++
++unsigned long arch_align_stack(unsigned long sp)
++{
++ if (randomize_va_space)
++ sp -= get_random_int() % 8192;
++ return sp & ~0xf;
++}
+Index: head-2008-11-25/arch/x86/kernel/quirks-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/quirks-xen.c 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,47 @@
++/*
++ * This file contains work-arounds for x86 and x86_64 platform bugs.
++ */
++#include <linux/pci.h>
++#include <linux/irq.h>
++
++#if defined(CONFIG_X86_IO_APIC) && (defined(CONFIG_SMP) || defined(CONFIG_XEN)) && defined(CONFIG_PCI)
++
++static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
++{
++ u8 config, rev;
++ u32 word;
++
++ /* BIOS may enable hardware IRQ balancing for
++ * E7520/E7320/E7525(revision ID 0x9 and below)
++ * based platforms.
++ * Disable SW irqbalance/affinity on those platforms.
++ */
++ pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
++ if (rev > 0x9)
++ return;
++
++ printk(KERN_INFO "Intel E7520/7320/7525 detected.");
++
++ /* enable access to config space*/
++ pci_read_config_byte(dev, 0xf4, &config);
++ pci_write_config_byte(dev, 0xf4, config|0x2);
++
++ /* read xTPR register */
++ raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
++
++ if (!(word & (1 << 13))) {
++ struct xen_platform_op op;
++ printk(KERN_INFO "Disabling irq balancing and affinity\n");
++ op.cmd = XENPF_platform_quirk;
++ op.u.platform_quirk.quirk_id = QUIRK_NOIRQBALANCING;
++ WARN_ON(HYPERVISOR_platform_op(&op));
++ }
++
++ /* put back the original value for config space*/
++ if (!(config & 0x2))
++ pci_write_config_byte(dev, 0xf4, config);
++}
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_intel_irqbalance);
++#endif
+Index: head-2008-11-25/arch/x86/kernel/setup_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/setup_32-xen.c 2008-04-22 15:41:51.000000000 +0200
+@@ -0,0 +1,1919 @@
++/*
++ * linux/arch/i386/kernel/setup.c
++ *
++ * Copyright (C) 1995 Linus Torvalds
++ *
++ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
++ *
++ * Memory region support
++ * David Parsons <orc@pell.chi.il.us>, July-August 1999
++ *
++ * Added E820 sanitization routine (removes overlapping memory regions);
++ * Brian Moyle <bmoyle@mvista.com>, February 2001
++ *
++ * Moved CPU detection code to cpu/${cpu}.c
++ * Patrick Mochel <mochel@osdl.org>, March 2002
++ *
++ * Provisions for empty E820 memory regions (reported by certain BIOSes).
++ * Alex Achenbach <xela@slit.de>, December 2002.
++ *
++ */
++
++/*
++ * This file handles the architecture-dependent parts of initialization
++ */
++
++#include <linux/sched.h>
++#include <linux/mm.h>
++#include <linux/mmzone.h>
++#include <linux/screen_info.h>
++#include <linux/ioport.h>
++#include <linux/acpi.h>
++#include <linux/apm_bios.h>
++#include <linux/initrd.h>
++#include <linux/bootmem.h>
++#include <linux/seq_file.h>
++#include <linux/platform_device.h>
++#include <linux/console.h>
++#include <linux/mca.h>
++#include <linux/root_dev.h>
++#include <linux/highmem.h>
++#include <linux/module.h>
++#include <linux/efi.h>
++#include <linux/init.h>
++#include <linux/edd.h>
++#include <linux/nodemask.h>
++#include <linux/kernel.h>
++#include <linux/percpu.h>
++#include <linux/notifier.h>
++#include <linux/kexec.h>
++#include <linux/crash_dump.h>
++#include <linux/dmi.h>
++#include <linux/pfn.h>
++
++#include <video/edid.h>
++
++#include <asm/apic.h>
++#include <asm/e820.h>
++#include <asm/mpspec.h>
++#include <asm/setup.h>
++#include <asm/arch_hooks.h>
++#include <asm/sections.h>
++#include <asm/io_apic.h>
++#include <asm/ist.h>
++#include <asm/io.h>
++#include <asm/hypervisor.h>
++#include <xen/interface/physdev.h>
++#include <xen/interface/memory.h>
++#include <xen/features.h>
++#include <xen/firmware.h>
++#include <xen/xencons.h>
++#include <setup_arch.h>
++#include <bios_ebda.h>
++
++#ifdef CONFIG_XEN
++#include <xen/interface/kexec.h>
++#endif
++
++/* Forward Declaration. */
++void __init find_max_pfn(void);
++
++static int xen_panic_event(struct notifier_block *, unsigned long, void *);
++static struct notifier_block xen_panic_block = {
++ xen_panic_event, NULL, 0 /* try to go last */
++};
++
++extern char hypercall_page[PAGE_SIZE];
++EXPORT_SYMBOL(hypercall_page);
++
++int disable_pse __devinitdata = 0;
++
++/*
++ * Machine setup..
++ */
++
++#ifdef CONFIG_EFI
++int efi_enabled = 0;
++EXPORT_SYMBOL(efi_enabled);
++#endif
++
++/* cpu data as detected by the assembly code in head.S */
++struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
++/* common cpu data for all cpus */
++struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
++EXPORT_SYMBOL(boot_cpu_data);
++
++unsigned long mmu_cr4_features;
++
++#ifdef CONFIG_ACPI
++ int acpi_disabled = 0;
++#else
++ int acpi_disabled = 1;
++#endif
++EXPORT_SYMBOL(acpi_disabled);
++
++#ifdef CONFIG_ACPI
++int __initdata acpi_force = 0;
++extern acpi_interrupt_flags acpi_sci_flags;
++#endif
++
++/* for MCA, but anyone else can use it if they want */
++unsigned int machine_id;
++#ifdef CONFIG_MCA
++EXPORT_SYMBOL(machine_id);
++#endif
++unsigned int machine_submodel_id;
++unsigned int BIOS_revision;
++unsigned int mca_pentium_flag;
++
++/* For PCI or other memory-mapped resources */
++unsigned long pci_mem_start = 0x10000000;
++#ifdef CONFIG_PCI
++EXPORT_SYMBOL(pci_mem_start);
++#endif
++
++/* Boot loader ID as an integer, for the benefit of proc_dointvec */
++int bootloader_type;
++
++/* user-defined highmem size */
++static unsigned int highmem_pages = -1;
++
++/*
++ * Setup options
++ */
++struct drive_info_struct { char dummy[32]; } drive_info;
++#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \
++ defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE)
++EXPORT_SYMBOL(drive_info);
++#endif
++struct screen_info screen_info;
++EXPORT_SYMBOL(screen_info);
++struct apm_info apm_info;
++EXPORT_SYMBOL(apm_info);
++struct sys_desc_table_struct {
++ unsigned short length;
++ unsigned char table[0];
++};
++struct edid_info edid_info;
++EXPORT_SYMBOL_GPL(edid_info);
++#ifndef CONFIG_XEN
++#define copy_edid() (edid_info = EDID_INFO)
++#endif
++struct ist_info ist_info;
++#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
++ defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
++EXPORT_SYMBOL(ist_info);
++#endif
++struct e820map e820;
++#ifdef CONFIG_XEN
++struct e820map machine_e820;
++#endif
++
++extern void early_cpu_init(void);
++extern void generic_apic_probe(char *);
++extern int root_mountflags;
++
++unsigned long saved_videomode;
++
++#define RAMDISK_IMAGE_START_MASK 0x07FF
++#define RAMDISK_PROMPT_FLAG 0x8000
++#define RAMDISK_LOAD_FLAG 0x4000
++
++static char command_line[COMMAND_LINE_SIZE];
++
++unsigned char __initdata boot_params[PARAM_SIZE];
++
++static struct resource data_resource = {
++ .name = "Kernel data",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource code_resource = {
++ .name = "Kernel code",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource system_rom_resource = {
++ .name = "System ROM",
++ .start = 0xf0000,
++ .end = 0xfffff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++};
++
++static struct resource extension_rom_resource = {
++ .name = "Extension ROM",
++ .start = 0xe0000,
++ .end = 0xeffff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++};
++
++static struct resource adapter_rom_resources[] = { {
++ .name = "Adapter ROM",
++ .start = 0xc8000,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++} };
++
++#define ADAPTER_ROM_RESOURCES \
++ (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
++
++static struct resource video_rom_resource = {
++ .name = "Video ROM",
++ .start = 0xc0000,
++ .end = 0xc7fff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++};
++
++static struct resource video_ram_resource = {
++ .name = "Video RAM area",
++ .start = 0xa0000,
++ .end = 0xbffff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource standard_io_resources[] = { {
++ .name = "dma1",
++ .start = 0x0000,
++ .end = 0x001f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "pic1",
++ .start = 0x0020,
++ .end = 0x0021,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "timer0",
++ .start = 0x0040,
++ .end = 0x0043,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "timer1",
++ .start = 0x0050,
++ .end = 0x0053,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "keyboard",
++ .start = 0x0060,
++ .end = 0x006f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "dma page reg",
++ .start = 0x0080,
++ .end = 0x008f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "pic2",
++ .start = 0x00a0,
++ .end = 0x00a1,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "dma2",
++ .start = 0x00c0,
++ .end = 0x00df,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "fpu",
++ .start = 0x00f0,
++ .end = 0x00ff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++} };
++
++#define STANDARD_IO_RESOURCES \
++ (sizeof standard_io_resources / sizeof standard_io_resources[0])
++
++#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
++
++static int __init romchecksum(unsigned char *rom, unsigned long length)
++{
++ unsigned char *p, sum = 0;
++
++ for (p = rom; p < rom + length; p++)
++ sum += *p;
++ return sum == 0;
++}
++
++static void __init probe_roms(void)
++{
++ unsigned long start, length, upper;
++ unsigned char *rom;
++ int i;
++
++#ifdef CONFIG_XEN
++ /* Nothing to do if not running in dom0. */
++ if (!is_initial_xendomain())
++ return;
++#endif
++
++ /* video rom */
++ upper = adapter_rom_resources[0].start;
++ for (start = video_rom_resource.start; start < upper; start += 2048) {
++ rom = isa_bus_to_virt(start);
++ if (!romsignature(rom))
++ continue;
++
++ video_rom_resource.start = start;
++
++ /* 0 < length <= 0x7f * 512, historically */
++ length = rom[2] * 512;
++
++ /* if checksum okay, trust length byte */
++ if (length && romchecksum(rom, length))
++ video_rom_resource.end = start + length - 1;
++
++ request_resource(&iomem_resource, &video_rom_resource);
++ break;
++ }
++
++ start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
++ if (start < upper)
++ start = upper;
++
++ /* system rom */
++ request_resource(&iomem_resource, &system_rom_resource);
++ upper = system_rom_resource.start;
++
++ /* check for extension rom (ignore length byte!) */
++ rom = isa_bus_to_virt(extension_rom_resource.start);
++ if (romsignature(rom)) {
++ length = extension_rom_resource.end - extension_rom_resource.start + 1;
++ if (romchecksum(rom, length)) {
++ request_resource(&iomem_resource, &extension_rom_resource);
++ upper = extension_rom_resource.start;
++ }
++ }
++
++ /* check for adapter roms on 2k boundaries */
++ for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
++ rom = isa_bus_to_virt(start);
++ if (!romsignature(rom))
++ continue;
++
++ /* 0 < length <= 0x7f * 512, historically */
++ length = rom[2] * 512;
++
++ /* but accept any length that fits if checksum okay */
++ if (!length || start + length > upper || !romchecksum(rom, length))
++ continue;
++
++ adapter_rom_resources[i].start = start;
++ adapter_rom_resources[i].end = start + length - 1;
++ request_resource(&iomem_resource, &adapter_rom_resources[i]);
++
++ start = adapter_rom_resources[i++].end & ~2047UL;
++ }
++}
++
++/*
++ * Point at the empty zero page to start with. We map the real shared_info
++ * page as soon as fixmap is up and running.
++ */
++shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
++EXPORT_SYMBOL(HYPERVISOR_shared_info);
++
++unsigned long *phys_to_machine_mapping;
++unsigned long *pfn_to_mfn_frame_list_list, *pfn_to_mfn_frame_list[16];
++EXPORT_SYMBOL(phys_to_machine_mapping);
++
++/* Raw start-of-day parameters from the hypervisor. */
++start_info_t *xen_start_info;
++EXPORT_SYMBOL(xen_start_info);
++
++void __init add_memory_region(unsigned long long start,
++ unsigned long long size, int type)
++{
++ int x;
++
++ if (!efi_enabled) {
++ x = e820.nr_map;
++
++ if (x == E820MAX) {
++ printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
++ return;
++ }
++
++ e820.map[x].addr = start;
++ e820.map[x].size = size;
++ e820.map[x].type = type;
++ e820.nr_map++;
++ }
++} /* add_memory_region */
++
++static void __init limit_regions(unsigned long long size)
++{
++ unsigned long long current_addr = 0;
++ int i;
++
++ if (efi_enabled) {
++ efi_memory_desc_t *md;
++ void *p;
++
++ for (p = memmap.map, i = 0; p < memmap.map_end;
++ p += memmap.desc_size, i++) {
++ md = p;
++ current_addr = md->phys_addr + (md->num_pages << 12);
++ if (md->type == EFI_CONVENTIONAL_MEMORY) {
++ if (current_addr >= size) {
++ md->num_pages -=
++ (((current_addr-size) + PAGE_SIZE-1) >> PAGE_SHIFT);
++ memmap.nr_map = i + 1;
++ return;
++ }
++ }
++ }
++ }
++ for (i = 0; i < e820.nr_map; i++) {
++ current_addr = e820.map[i].addr + e820.map[i].size;
++ if (current_addr < size)
++ continue;
++
++ if (e820.map[i].type != E820_RAM)
++ continue;
++
++ if (e820.map[i].addr >= size) {
++ /*
++ * This region starts past the end of the
++ * requested size, skip it completely.
++ */
++ e820.nr_map = i;
++ } else {
++ e820.nr_map = i + 1;
++ e820.map[i].size -= current_addr - size;
++ }
++ return;
++ }
++#ifdef CONFIG_XEN
++ if (i==e820.nr_map && current_addr < size) {
++ /*
++ * The e820 map finished before our requested size so
++ * extend the final entry to the requested address.
++ */
++ --i;
++ if (e820.map[i].type == E820_RAM)
++ e820.map[i].size -= current_addr - size;
++ else
++ add_memory_region(current_addr, size - current_addr, E820_RAM);
++ }
++#endif
++}
++
++#define E820_DEBUG 1
++
++static void __init print_memory_map(char *who)
++{
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ printk(" %s: %016Lx - %016Lx ", who,
++ e820.map[i].addr,
++ e820.map[i].addr + e820.map[i].size);
++ switch (e820.map[i].type) {
++ case E820_RAM: printk("(usable)\n");
++ break;
++ case E820_RESERVED:
++ printk("(reserved)\n");
++ break;
++ case E820_ACPI:
++ printk("(ACPI data)\n");
++ break;
++ case E820_NVS:
++ printk("(ACPI NVS)\n");
++ break;
++ default: printk("type %lu\n", e820.map[i].type);
++ break;
++ }
++ }
++}
++
++/*
++ * Sanitize the BIOS e820 map.
++ *
++ * Some e820 responses include overlapping entries. The following
++ * replaces the original e820 map with a new one, removing overlaps.
++ *
++ */
++struct change_member {
++ struct e820entry *pbios; /* pointer to original bios entry */
++ unsigned long long addr; /* address for this change point */
++};
++static struct change_member change_point_list[2*E820MAX] __initdata;
++static struct change_member *change_point[2*E820MAX] __initdata;
++static struct e820entry *overlap_list[E820MAX] __initdata;
++static struct e820entry new_bios[E820MAX] __initdata;
++
++int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
++{
++ struct change_member *change_tmp;
++ unsigned long current_type, last_type;
++ unsigned long long last_addr;
++ int chgidx, still_changing;
++ int overlap_entries;
++ int new_bios_entry;
++ int old_nr, new_nr, chg_nr;
++ int i;
++
++ /*
++ Visually we're performing the following (1,2,3,4 = memory types)...
++
++ Sample memory map (w/overlaps):
++ ____22__________________
++ ______________________4_
++ ____1111________________
++ _44_____________________
++ 11111111________________
++ ____________________33__
++ ___________44___________
++ __________33333_________
++ ______________22________
++ ___________________2222_
++ _________111111111______
++ _____________________11_
++ _________________4______
++
++ Sanitized equivalent (no overlap):
++ 1_______________________
++ _44_____________________
++ ___1____________________
++ ____22__________________
++ ______11________________
++ _________1______________
++ __________3_____________
++ ___________44___________
++ _____________33_________
++ _______________2________
++ ________________1_______
++ _________________4______
++ ___________________2____
++ ____________________33__
++ ______________________4_
++ */
++
++ /* if there's only one memory region, don't bother */
++ if (*pnr_map < 2)
++ return -1;
++
++ old_nr = *pnr_map;
++
++ /* bail out if we find any unreasonable addresses in bios map */
++ for (i=0; i<old_nr; i++)
++ if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
++ return -1;
++
++ /* create pointers for initial change-point information (for sorting) */
++ for (i=0; i < 2*old_nr; i++)
++ change_point[i] = &change_point_list[i];
++
++ /* record all known change-points (starting and ending addresses),
++ omitting those that are for empty memory regions */
++ chgidx = 0;
++ for (i=0; i < old_nr; i++) {
++ if (biosmap[i].size != 0) {
++ change_point[chgidx]->addr = biosmap[i].addr;
++ change_point[chgidx++]->pbios = &biosmap[i];
++ change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
++ change_point[chgidx++]->pbios = &biosmap[i];
++ }
++ }
++ chg_nr = chgidx; /* true number of change-points */
++
++ /* sort change-point list by memory addresses (low -> high) */
++ still_changing = 1;
++ while (still_changing) {
++ still_changing = 0;
++ for (i=1; i < chg_nr; i++) {
++ /* if <current_addr> > <last_addr>, swap */
++ /* or, if current=<start_addr> & last=<end_addr>, swap */
++ if ((change_point[i]->addr < change_point[i-1]->addr) ||
++ ((change_point[i]->addr == change_point[i-1]->addr) &&
++ (change_point[i]->addr == change_point[i]->pbios->addr) &&
++ (change_point[i-1]->addr != change_point[i-1]->pbios->addr))
++ )
++ {
++ change_tmp = change_point[i];
++ change_point[i] = change_point[i-1];
++ change_point[i-1] = change_tmp;
++ still_changing=1;
++ }
++ }
++ }
++
++ /* create a new bios memory map, removing overlaps */
++ overlap_entries=0; /* number of entries in the overlap table */
++ new_bios_entry=0; /* index for creating new bios map entries */
++ last_type = 0; /* start with undefined memory type */
++ last_addr = 0; /* start with 0 as last starting address */
++ /* loop through change-points, determining affect on the new bios map */
++ for (chgidx=0; chgidx < chg_nr; chgidx++)
++ {
++ /* keep track of all overlapping bios entries */
++ if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
++ {
++ /* add map entry to overlap list (> 1 entry implies an overlap) */
++ overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
++ }
++ else
++ {
++ /* remove entry from list (order independent, so swap with last) */
++ for (i=0; i<overlap_entries; i++)
++ {
++ if (overlap_list[i] == change_point[chgidx]->pbios)
++ overlap_list[i] = overlap_list[overlap_entries-1];
++ }
++ overlap_entries--;
++ }
++ /* if there are overlapping entries, decide which "type" to use */
++ /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
++ current_type = 0;
++ for (i=0; i<overlap_entries; i++)
++ if (overlap_list[i]->type > current_type)
++ current_type = overlap_list[i]->type;
++ /* continue building up new bios map based on this information */
++ if (current_type != last_type) {
++ if (last_type != 0) {
++ new_bios[new_bios_entry].size =
++ change_point[chgidx]->addr - last_addr;
++ /* move forward only if the new size was non-zero */
++ if (new_bios[new_bios_entry].size != 0)
++ if (++new_bios_entry >= E820MAX)
++ break; /* no more space left for new bios entries */
++ }
++ if (current_type != 0) {
++ new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
++ new_bios[new_bios_entry].type = current_type;
++ last_addr=change_point[chgidx]->addr;
++ }
++ last_type = current_type;
++ }
++ }
++ new_nr = new_bios_entry; /* retain count for new bios entries */
++
++ /* copy new bios mapping into original location */
++ memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
++ *pnr_map = new_nr;
++
++ return 0;
++}
++
++/*
++ * Copy the BIOS e820 map into a safe place.
++ *
++ * Sanity-check it while we're at it..
++ *
++ * If we're lucky and live on a modern system, the setup code
++ * will have given us a memory map that we can use to properly
++ * set up memory. If we aren't, we'll fake a memory map.
++ *
++ * We check to see that the memory map contains at least 2 elements
++ * before we'll use it, because the detection code in setup.S may
++ * not be perfect and most every PC known to man has two memory
++ * regions: one from 0 to 640k, and one from 1mb up. (The IBM
++ * thinkpad 560x, for example, does not cooperate with the memory
++ * detection code.)
++ */
++int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
++{
++#ifndef CONFIG_XEN
++ /* Only one memory region (or negative)? Ignore it */
++ if (nr_map < 2)
++ return -1;
++#else
++ BUG_ON(nr_map < 1);
++#endif
++
++ do {
++ unsigned long long start = biosmap->addr;
++ unsigned long long size = biosmap->size;
++ unsigned long long end = start + size;
++ unsigned long type = biosmap->type;
++
++ /* Overflow in 64 bits? Ignore the memory map. */
++ if (start > end)
++ return -1;
++
++#ifndef CONFIG_XEN
++ /*
++ * Some BIOSes claim RAM in the 640k - 1M region.
++ * Not right. Fix it up.
++ */
++ if (type == E820_RAM) {
++ if (start < 0x100000ULL && end > 0xA0000ULL) {
++ if (start < 0xA0000ULL)
++ add_memory_region(start, 0xA0000ULL-start, type);
++ if (end <= 0x100000ULL)
++ continue;
++ start = 0x100000ULL;
++ size = end - start;
++ }
++ }
++#endif
++ add_memory_region(start, size, type);
++ } while (biosmap++,--nr_map);
++
++#ifdef CONFIG_XEN
++ if (is_initial_xendomain()) {
++ struct xen_memory_map memmap;
++
++ memmap.nr_entries = E820MAX;
++ set_xen_guest_handle(memmap.buffer, machine_e820.map);
++
++ if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
++ BUG();
++ machine_e820.nr_map = memmap.nr_entries;
++ } else
++ machine_e820 = e820;
++#endif
++
++ return 0;
++}
++
++#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
++struct edd edd;
++#ifdef CONFIG_EDD_MODULE
++EXPORT_SYMBOL(edd);
++#endif
++#ifndef CONFIG_XEN
++/**
++ * copy_edd() - Copy the BIOS EDD information
++ * from boot_params into a safe place.
++ *
++ */
++static inline void copy_edd(void)
++{
++ memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
++ memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
++ edd.mbr_signature_nr = EDD_MBR_SIG_NR;
++ edd.edd_info_nr = EDD_NR;
++}
++#endif
++#else
++static inline void copy_edd(void)
++{
++}
++#endif
++
++static void __init parse_cmdline_early (char ** cmdline_p)
++{
++ char c = ' ', *to = command_line, *from = saved_command_line;
++ int len = 0, max_cmdline;
++ int userdef = 0;
++
++ if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
++ max_cmdline = COMMAND_LINE_SIZE;
++ memcpy(saved_command_line, xen_start_info->cmd_line, max_cmdline);
++ /* Save unparsed command line copy for /proc/cmdline */
++ saved_command_line[max_cmdline-1] = '\0';
++
++ for (;;) {
++ if (c != ' ')
++ goto next_char;
++ /*
++ * "mem=nopentium" disables the 4MB page tables.
++ * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
++ * to <mem>, overriding the bios size.
++ * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
++ * <start> to <start>+<mem>, overriding the bios size.
++ *
++ * HPA tells me bootloaders need to parse mem=, so no new
++ * option should be mem= [also see Documentation/i386/boot.txt]
++ */
++ if (!memcmp(from, "mem=", 4)) {
++ if (to != command_line)
++ to--;
++ if (!memcmp(from+4, "nopentium", 9)) {
++ from += 9+4;
++ clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
++ disable_pse = 1;
++ } else {
++ /* If the user specifies memory size, we
++ * limit the BIOS-provided memory map to
++ * that size. exactmap can be used to specify
++ * the exact map. mem=number can be used to
++ * trim the existing memory map.
++ */
++ unsigned long long mem_size;
++
++ mem_size = memparse(from+4, &from);
++ limit_regions(mem_size);
++ userdef=1;
++ }
++ }
++
++ else if (!memcmp(from, "memmap=", 7)) {
++ if (to != command_line)
++ to--;
++ if (!memcmp(from+7, "exactmap", 8)) {
++#ifdef CONFIG_CRASH_DUMP
++ /* If we are doing a crash dump, we
++ * still need to know the real mem
++ * size before original memory map is
++ * reset.
++ */
++ find_max_pfn();
++ saved_max_pfn = max_pfn;
++#endif
++ from += 8+7;
++ e820.nr_map = 0;
++ userdef = 1;
++ } else {
++ /* If the user specifies memory size, we
++ * limit the BIOS-provided memory map to
++ * that size. exactmap can be used to specify
++ * the exact map. mem=number can be used to
++ * trim the existing memory map.
++ */
++ unsigned long long start_at, mem_size;
++
++ mem_size = memparse(from+7, &from);
++ if (*from == '@') {
++ start_at = memparse(from+1, &from);
++ add_memory_region(start_at, mem_size, E820_RAM);
++ } else if (*from == '#') {
++ start_at = memparse(from+1, &from);
++ add_memory_region(start_at, mem_size, E820_ACPI);
++ } else if (*from == '$') {
++ start_at = memparse(from+1, &from);
++ add_memory_region(start_at, mem_size, E820_RESERVED);
++ } else {
++ limit_regions(mem_size);
++ userdef=1;
++ }
++ }
++ }
++
++ else if (!memcmp(from, "noexec=", 7))
++ noexec_setup(from + 7);
++
++
++#ifdef CONFIG_X86_MPPARSE
++ /*
++ * If the BIOS enumerates physical processors before logical,
++ * maxcpus=N at enumeration-time can be used to disable HT.
++ */
++ else if (!memcmp(from, "maxcpus=", 8)) {
++ extern unsigned int maxcpus;
++
++ maxcpus = simple_strtoul(from + 8, NULL, 0);
++ }
++#endif
++
++#ifdef CONFIG_ACPI
++ /* "acpi=off" disables both ACPI table parsing and interpreter */
++ else if (!memcmp(from, "acpi=off", 8)) {
++ disable_acpi();
++ }
++
++ /* acpi=force to over-ride black-list */
++ else if (!memcmp(from, "acpi=force", 10)) {
++ acpi_force = 1;
++ acpi_ht = 1;
++ acpi_disabled = 0;
++ }
++
++ /* acpi=strict disables out-of-spec workarounds */
++ else if (!memcmp(from, "acpi=strict", 11)) {
++ acpi_strict = 1;
++ }
++
++ /* Limit ACPI just to boot-time to enable HT */
++ else if (!memcmp(from, "acpi=ht", 7)) {
++ if (!acpi_force)
++ disable_acpi();
++ acpi_ht = 1;
++ }
++
++ /* "pci=noacpi" disable ACPI IRQ routing and PCI scan */
++ else if (!memcmp(from, "pci=noacpi", 10)) {
++ acpi_disable_pci();
++ }
++ /* "acpi=noirq" disables ACPI interrupt routing */
++ else if (!memcmp(from, "acpi=noirq", 10)) {
++ acpi_noirq_set();
++ }
++
++ else if (!memcmp(from, "acpi_sci=edge", 13))
++ acpi_sci_flags.trigger = 1;
++
++ else if (!memcmp(from, "acpi_sci=level", 14))
++ acpi_sci_flags.trigger = 3;
++
++ else if (!memcmp(from, "acpi_sci=high", 13))
++ acpi_sci_flags.polarity = 1;
++
++ else if (!memcmp(from, "acpi_sci=low", 12))
++ acpi_sci_flags.polarity = 3;
++
++#ifdef CONFIG_X86_IO_APIC
++ else if (!memcmp(from, "acpi_skip_timer_override", 24))
++ acpi_skip_timer_override = 1;
++
++ if (!memcmp(from, "disable_timer_pin_1", 19))
++ disable_timer_pin_1 = 1;
++ if (!memcmp(from, "enable_timer_pin_1", 18))
++ disable_timer_pin_1 = -1;
++
++ /* disable IO-APIC */
++ else if (!memcmp(from, "noapic", 6))
++ disable_ioapic_setup();
++#endif /* CONFIG_X86_IO_APIC */
++#endif /* CONFIG_ACPI */
++
++#ifdef CONFIG_X86_LOCAL_APIC
++ /* enable local APIC */
++ else if (!memcmp(from, "lapic", 5))
++ lapic_enable();
++
++ /* disable local APIC */
++ else if (!memcmp(from, "nolapic", 6))
++ lapic_disable();
++#endif /* CONFIG_X86_LOCAL_APIC */
++
++#ifdef CONFIG_KEXEC
++ /* crashkernel=size@addr specifies the location to reserve for
++ * a crash kernel. By reserving this memory we guarantee
++ * that linux never set's it up as a DMA target.
++ * Useful for holding code to do something appropriate
++ * after a kernel panic.
++ */
++ else if (!memcmp(from, "crashkernel=", 12)) {
++#ifndef CONFIG_XEN
++ unsigned long size, base;
++ size = memparse(from+12, &from);
++ if (*from == '@') {
++ base = memparse(from+1, &from);
++ /* FIXME: Do I want a sanity check
++ * to validate the memory range?
++ */
++ crashk_res.start = base;
++ crashk_res.end = base + size - 1;
++ }
++#else
++ printk("Ignoring crashkernel command line, "
++ "parameter will be supplied by xen\n");
++#endif
++ }
++#endif
++#ifdef CONFIG_PROC_VMCORE
++ /* elfcorehdr= specifies the location of elf core header
++ * stored by the crashed kernel.
++ */
++ else if (!memcmp(from, "elfcorehdr=", 11))
++ elfcorehdr_addr = memparse(from+11, &from);
++#endif
++
++ /*
++ * highmem=size forces highmem to be exactly 'size' bytes.
++ * This works even on boxes that have no highmem otherwise.
++ * This also works to reduce highmem size on bigger boxes.
++ */
++ else if (!memcmp(from, "highmem=", 8))
++ highmem_pages = memparse(from+8, &from) >> PAGE_SHIFT;
++
++ /*
++ * vmalloc=size forces the vmalloc area to be exactly 'size'
++ * bytes. This can be used to increase (or decrease) the
++ * vmalloc area - the default is 128m.
++ */
++ else if (!memcmp(from, "vmalloc=", 8))
++ __VMALLOC_RESERVE = memparse(from+8, &from);
++
++ next_char:
++ c = *(from++);
++ if (!c)
++ break;
++ if (COMMAND_LINE_SIZE <= ++len)
++ break;
++ *(to++) = c;
++ }
++ *to = '\0';
++ *cmdline_p = command_line;
++ if (userdef) {
++ printk(KERN_INFO "user-defined physical RAM map:\n");
++ print_memory_map("user");
++ }
++}
++
++/*
++ * Callback for efi_memory_walk.
++ */
++static int __init
++efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
++{
++ unsigned long *max_pfn = arg, pfn;
++
++ if (start < end) {
++ pfn = PFN_UP(end -1);
++ if (pfn > *max_pfn)
++ *max_pfn = pfn;
++ }
++ return 0;
++}
++
++static int __init
++efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
++{
++ memory_present(0, start, end);
++ return 0;
++}
++
++/*
++ * This function checks if any part of the range <start,end> is mapped
++ * with type.
++ */
++int
++e820_any_mapped(u64 start, u64 end, unsigned type)
++{
++ int i;
++
++#ifndef CONFIG_XEN
++ for (i = 0; i < e820.nr_map; i++) {
++ const struct e820entry *ei = &e820.map[i];
++#else
++ if (!is_initial_xendomain())
++ return 0;
++ for (i = 0; i < machine_e820.nr_map; ++i) {
++ const struct e820entry *ei = &machine_e820.map[i];
++#endif
++
++ if (type && ei->type != type)
++ continue;
++ if (ei->addr >= end || ei->addr + ei->size <= start)
++ continue;
++ return 1;
++ }
++ return 0;
++}
++EXPORT_SYMBOL_GPL(e820_any_mapped);
++
++ /*
++ * This function checks if the entire range <start,end> is mapped with type.
++ *
++ * Note: this function only works correct if the e820 table is sorted and
++ * not-overlapping, which is the case
++ */
++int __init
++e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
++{
++ u64 start = s;
++ u64 end = e;
++ int i;
++
++#ifndef CONFIG_XEN
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++#else
++ if (!is_initial_xendomain())
++ return 0;
++ for (i = 0; i < machine_e820.nr_map; ++i) {
++ const struct e820entry *ei = &machine_e820.map[i];
++#endif
++ if (type && ei->type != type)
++ continue;
++ /* is the region (part) in overlap with the current region ?*/
++ if (ei->addr >= end || ei->addr + ei->size <= start)
++ continue;
++ /* if the region is at the beginning of <start,end> we move
++ * start to the end of the region since it's ok until there
++ */
++ if (ei->addr <= start)
++ start = ei->addr + ei->size;
++ /* if start is now at or beyond end, we're done, full
++ * coverage */
++ if (start >= end)
++ return 1; /* we're done */
++ }
++ return 0;
++}
++
++/*
++ * Find the highest page frame number we have available
++ */
++void __init find_max_pfn(void)
++{
++ int i;
++
++ max_pfn = 0;
++ if (efi_enabled) {
++ efi_memmap_walk(efi_find_max_pfn, &max_pfn);
++ efi_memmap_walk(efi_memory_present_wrapper, NULL);
++ return;
++ }
++
++ for (i = 0; i < e820.nr_map; i++) {
++ unsigned long start, end;
++ /* RAM? */
++ if (e820.map[i].type != E820_RAM)
++ continue;
++ start = PFN_UP(e820.map[i].addr);
++ end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
++ if (start >= end)
++ continue;
++ if (end > max_pfn)
++ max_pfn = end;
++ memory_present(0, start, end);
++ }
++}
++
++/*
++ * Determine low and high memory ranges:
++ */
++unsigned long __init find_max_low_pfn(void)
++{
++ unsigned long max_low_pfn;
++
++ max_low_pfn = max_pfn;
++ if (max_low_pfn > MAXMEM_PFN) {
++ if (highmem_pages == -1)
++ highmem_pages = max_pfn - MAXMEM_PFN;
++ if (highmem_pages + MAXMEM_PFN < max_pfn)
++ max_pfn = MAXMEM_PFN + highmem_pages;
++ if (highmem_pages + MAXMEM_PFN > max_pfn) {
++ printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
++ highmem_pages = 0;
++ }
++ max_low_pfn = MAXMEM_PFN;
++#ifndef CONFIG_HIGHMEM
++ /* Maximum memory usable is what is directly addressable */
++ printk(KERN_WARNING "Warning only %ldMB will be used.\n",
++ MAXMEM>>20);
++ if (max_pfn > MAX_NONPAE_PFN)
++ printk(KERN_WARNING "Use a PAE enabled kernel.\n");
++ else
++ printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
++ max_pfn = MAXMEM_PFN;
++#else /* !CONFIG_HIGHMEM */
++#ifndef CONFIG_X86_PAE
++ if (max_pfn > MAX_NONPAE_PFN) {
++ max_pfn = MAX_NONPAE_PFN;
++ printk(KERN_WARNING "Warning only 4GB will be used.\n");
++ printk(KERN_WARNING "Use a PAE enabled kernel.\n");
++ }
++#endif /* !CONFIG_X86_PAE */
++#endif /* !CONFIG_HIGHMEM */
++ } else {
++ if (highmem_pages == -1)
++ highmem_pages = 0;
++#ifdef CONFIG_HIGHMEM
++ if (highmem_pages >= max_pfn) {
++ printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
++ highmem_pages = 0;
++ }
++ if (highmem_pages) {
++ if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
++ printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
++ highmem_pages = 0;
++ }
++ max_low_pfn -= highmem_pages;
++ }
++#else
++ if (highmem_pages)
++ printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
++#endif
++ }
++ return max_low_pfn;
++}
++
++/*
++ * Free all available memory for boot time allocation. Used
++ * as a callback function by efi_memory_walk()
++ */
++
++static int __init
++free_available_memory(unsigned long start, unsigned long end, void *arg)
++{
++ /* check max_low_pfn */
++ if (start >= (max_low_pfn << PAGE_SHIFT))
++ return 0;
++ if (end >= (max_low_pfn << PAGE_SHIFT))
++ end = max_low_pfn << PAGE_SHIFT;
++ if (start < end)
++ free_bootmem(start, end - start);
++
++ return 0;
++}
++/*
++ * Register fully available low RAM pages with the bootmem allocator.
++ */
++static void __init register_bootmem_low_pages(unsigned long max_low_pfn)
++{
++ int i;
++
++ if (efi_enabled) {
++ efi_memmap_walk(free_available_memory, NULL);
++ return;
++ }
++ for (i = 0; i < e820.nr_map; i++) {
++ unsigned long curr_pfn, last_pfn, size;
++ /*
++ * Reserve usable low memory
++ */
++ if (e820.map[i].type != E820_RAM)
++ continue;
++ /*
++ * We are rounding up the start address of usable memory:
++ */
++ curr_pfn = PFN_UP(e820.map[i].addr);
++ if (curr_pfn >= max_low_pfn)
++ continue;
++ /*
++ * ... and at the end of the usable range downwards:
++ */
++ last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
++
++#ifdef CONFIG_XEN
++ /*
++ * Truncate to the number of actual pages currently
++ * present.
++ */
++ if (last_pfn > xen_start_info->nr_pages)
++ last_pfn = xen_start_info->nr_pages;
++#endif
++
++ if (last_pfn > max_low_pfn)
++ last_pfn = max_low_pfn;
++
++ /*
++ * .. finally, did all the rounding and playing
++ * around just make the area go away?
++ */
++ if (last_pfn <= curr_pfn)
++ continue;
++
++ size = last_pfn - curr_pfn;
++ free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
++ }
++}
++
++#ifndef CONFIG_XEN
++/*
++ * workaround for Dell systems that neglect to reserve EBDA
++ */
++static void __init reserve_ebda_region(void)
++{
++ unsigned int addr;
++ addr = get_bios_ebda();
++ if (addr)
++ reserve_bootmem(addr, PAGE_SIZE);
++}
++#endif
++
++#ifndef CONFIG_NEED_MULTIPLE_NODES
++void __init setup_bootmem_allocator(void);
++static unsigned long __init setup_memory(void)
++{
++ /*
++ * partially used pages are not usable - thus
++ * we are rounding upwards:
++ */
++ min_low_pfn = PFN_UP(__pa(xen_start_info->pt_base)) +
++ xen_start_info->nr_pt_frames;
++
++ find_max_pfn();
++
++ max_low_pfn = find_max_low_pfn();
++
++#ifdef CONFIG_HIGHMEM
++ highstart_pfn = highend_pfn = max_pfn;
++ if (max_pfn > max_low_pfn) {
++ highstart_pfn = max_low_pfn;
++ }
++ printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
++ pages_to_mb(highend_pfn - highstart_pfn));
++#endif
++ printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
++ pages_to_mb(max_low_pfn));
++
++ setup_bootmem_allocator();
++
++ return max_low_pfn;
++}
++
++void __init zone_sizes_init(void)
++{
++ unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};
++ unsigned int max_dma, low;
++
++ max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
++ low = max_low_pfn;
++
++ if (low < max_dma)
++ zones_size[ZONE_DMA] = low;
++ else {
++ zones_size[ZONE_DMA] = max_dma;
++ zones_size[ZONE_NORMAL] = low - max_dma;
++#ifdef CONFIG_HIGHMEM
++ zones_size[ZONE_HIGHMEM] = highend_pfn - low;
++#endif
++ }
++ free_area_init(zones_size);
++}
++#else
++extern unsigned long __init setup_memory(void);
++extern void zone_sizes_init(void);
++#endif /* !CONFIG_NEED_MULTIPLE_NODES */
++
++void __init setup_bootmem_allocator(void)
++{
++ unsigned long bootmap_size;
++ /*
++ * Initialize the boot-time allocator (with low memory only):
++ */
++ bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
++
++ register_bootmem_low_pages(max_low_pfn);
++
++ /*
++ * Reserve the bootmem bitmap itself as well. We do this in two
++ * steps (first step was init_bootmem()) because this catches
++ * the (very unlikely) case of us accidentally initializing the
++ * bootmem allocator with an invalid RAM area.
++ */
++ reserve_bootmem(__PHYSICAL_START, (PFN_PHYS(min_low_pfn) +
++ bootmap_size + PAGE_SIZE-1) - (__PHYSICAL_START));
++
++#ifndef CONFIG_XEN
++ /*
++ * reserve physical page 0 - it's a special BIOS page on many boxes,
++ * enabling clean reboots, SMP operation, laptop functions.
++ */
++ reserve_bootmem(0, PAGE_SIZE);
++
++ /* reserve EBDA region, it's a 4K region */
++ reserve_ebda_region();
++
++ /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent
++ PCI prefetch into it (errata #56). Usually the page is reserved anyways,
++ unless you have no PS/2 mouse plugged in. */
++ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
++ boot_cpu_data.x86 == 6)
++ reserve_bootmem(0xa0000 - 4096, 4096);
++
++#ifdef CONFIG_SMP
++ /*
++ * But first pinch a few for the stack/trampoline stuff
++ * FIXME: Don't need the extra page at 4K, but need to fix
++ * trampoline before removing it. (see the GDT stuff)
++ */
++ reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
++#endif
++#ifdef CONFIG_ACPI_SLEEP
++ /*
++ * Reserve low memory region for sleep support.
++ */
++ acpi_reserve_bootmem();
++#endif
++#endif /* !CONFIG_XEN */
++
++#ifdef CONFIG_BLK_DEV_INITRD
++ if (xen_start_info->mod_start) {
++ if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
++ /*reserve_bootmem(INITRD_START, INITRD_SIZE);*/
++ initrd_start = INITRD_START + PAGE_OFFSET;
++ initrd_end = initrd_start+INITRD_SIZE;
++ initrd_below_start_ok = 1;
++ }
++ else {
++ printk(KERN_ERR "initrd extends beyond end of memory "
++ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
++ INITRD_START + INITRD_SIZE,
++ max_low_pfn << PAGE_SHIFT);
++ initrd_start = 0;
++ }
++ }
++#endif
++#ifdef CONFIG_KEXEC
++#ifdef CONFIG_XEN
++ xen_machine_kexec_setup_resources();
++#else
++ if (crashk_res.start != crashk_res.end)
++ reserve_bootmem(crashk_res.start,
++ crashk_res.end - crashk_res.start + 1);
++#endif
++#endif
++}
++
++/*
++ * The node 0 pgdat is initialized before all of these because
++ * it's needed for bootmem. node>0 pgdats have their virtual
++ * space allocated before the pagetables are in place to access
++ * them, so they can't be cleared then.
++ *
++ * This should all compile down to nothing when NUMA is off.
++ */
++void __init remapped_pgdat_init(void)
++{
++ int nid;
++
++ for_each_online_node(nid) {
++ if (nid != 0)
++ memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
++ }
++}
++
++/*
++ * Request address space for all standard RAM and ROM resources
++ * and also for regions reported as reserved by the e820.
++ */
++static void __init
++legacy_init_iomem_resources(struct e820entry *e820, int nr_map,
++ struct resource *code_resource,
++ struct resource *data_resource)
++{
++ int i;
++
++ probe_roms();
++
++ for (i = 0; i < nr_map; i++) {
++ struct resource *res;
++#ifndef CONFIG_RESOURCES_64BIT
++ if (e820[i].addr + e820[i].size > 0x100000000ULL)
++ continue;
++#endif
++ res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
++ switch (e820[i].type) {
++ case E820_RAM: res->name = "System RAM"; break;
++ case E820_ACPI: res->name = "ACPI Tables"; break;
++ case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
++ default: res->name = "reserved";
++ }
++ res->start = e820[i].addr;
++ res->end = res->start + e820[i].size - 1;
++ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
++ if (request_resource(&iomem_resource, res)) {
++ kfree(res);
++ continue;
++ }
++ if (e820[i].type == E820_RAM) {
++ /*
++ * We don't know which RAM region contains kernel data,
++ * so we try it repeatedly and let the resource manager
++ * test it.
++ */
++#ifndef CONFIG_XEN
++ request_resource(res, code_resource);
++ request_resource(res, data_resource);
++#endif
++#ifdef CONFIG_KEXEC
++ if (crashk_res.start != crashk_res.end)
++ request_resource(res, &crashk_res);
++#ifdef CONFIG_XEN
++ xen_machine_kexec_register_resources(res);
++#endif
++#endif
++ }
++ }
++}
++
++/*
++ * Locate a unused range of the physical address space below 4G which
++ * can be used for PCI mappings.
++ */
++static void __init
++e820_setup_gap(struct e820entry *e820, int nr_map)
++{
++ unsigned long gapstart, gapsize, round;
++ unsigned long long last;
++ int i;
++
++ /*
++ * Search for the bigest gap in the low 32 bits of the e820
++ * memory space.
++ */
++ last = 0x100000000ull;
++ gapstart = 0x10000000;
++ gapsize = 0x400000;
++ i = nr_map;
++ while (--i >= 0) {
++ unsigned long long start = e820[i].addr;
++ unsigned long long end = start + e820[i].size;
++
++ /*
++ * Since "last" is at most 4GB, we know we'll
++ * fit in 32 bits if this condition is true
++ */
++ if (last > end) {
++ unsigned long gap = last - end;
++
++ if (gap > gapsize) {
++ gapsize = gap;
++ gapstart = end;
++ }
++ }
++ if (start < last)
++ last = start;
++ }
++
++ /*
++ * See how much we want to round up: start off with
++ * rounding to the next 1MB area.
++ */
++ round = 0x100000;
++ while ((gapsize >> 4) > round)
++ round += round;
++ /* Fun with two's complement */
++ pci_mem_start = (gapstart + round) & -round;
++
++ printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
++ pci_mem_start, gapstart, gapsize);
++}
++
++/*
++ * Request address space for all standard resources
++ *
++ * This is called just before pcibios_init(), which is also a
++ * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
++ */
++static int __init request_standard_resources(void)
++{
++ int i;
++
++ /* Nothing to do if not running in dom0. */
++ if (!is_initial_xendomain())
++ return 0;
++
++ printk("Setting up standard PCI resources\n");
++#ifdef CONFIG_XEN
++ legacy_init_iomem_resources(machine_e820.map, machine_e820.nr_map,
++ &code_resource, &data_resource);
++#else
++ if (efi_enabled)
++ efi_initialize_iomem_resources(&code_resource, &data_resource);
++ else
++ legacy_init_iomem_resources(e820.map, e820.nr_map,
++ &code_resource, &data_resource);
++#endif
++
++ /* EFI systems may still have VGA */
++ request_resource(&iomem_resource, &video_ram_resource);
++
++ /* request I/O space for devices used on all i[345]86 PCs */
++ for (i = 0; i < STANDARD_IO_RESOURCES; i++)
++ request_resource(&ioport_resource, &standard_io_resources[i]);
++ return 0;
++}
++
++subsys_initcall(request_standard_resources);
++
++static void __init register_memory(void)
++{
++#ifdef CONFIG_XEN
++ if (is_initial_xendomain())
++ e820_setup_gap(machine_e820.map, machine_e820.nr_map);
++ else
++#endif
++ e820_setup_gap(e820.map, e820.nr_map);
++}
++
++#ifdef CONFIG_MCA
++static void set_mca_bus(int x)
++{
++ MCA_bus = x;
++}
++#else
++static void set_mca_bus(int x) { }
++#endif
++
++/*
++ * Determine if we were loaded by an EFI loader. If so, then we have also been
++ * passed the efi memmap, systab, etc., so we should use these data structures
++ * for initialization. Note, the efi init code path is determined by the
++ * global efi_enabled. This allows the same kernel image to be used on existing
++ * systems (with a traditional BIOS) as well as on EFI systems.
++ */
++void __init setup_arch(char **cmdline_p)
++{
++ int i, j, k, fpp;
++ struct physdev_set_iopl set_iopl;
++ unsigned long max_low_pfn;
++ unsigned long p2m_pages;
++
++ /* Force a quick death if the kernel panics (not domain 0). */
++ extern int panic_timeout;
++ if (!panic_timeout && !is_initial_xendomain())
++ panic_timeout = 1;
++
++ /* Register a call for panic conditions. */
++ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
++
++ WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
++ VMASST_TYPE_4gb_segments));
++ WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
++ VMASST_TYPE_writable_pagetables));
++
++ memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
++ pre_setup_arch_hook();
++ early_cpu_init();
++#ifdef CONFIG_SMP
++ prefill_possible_map();
++#endif
++
++ /*
++ * FIXME: This isn't an official loader_type right
++ * now but does currently work with elilo.
++ * If we were configured as an EFI kernel, check to make
++ * sure that we were loaded correctly from elilo and that
++ * the system table is valid. If not, then initialize normally.
++ */
++#ifdef CONFIG_EFI
++ if ((LOADER_TYPE == 0x50) && EFI_SYSTAB)
++ efi_enabled = 1;
++#endif
++
++ /* This must be initialized to UNNAMED_MAJOR for ipconfig to work
++ properly. Setting ROOT_DEV to default to /dev/ram0 breaks initrd.
++ */
++ ROOT_DEV = MKDEV(UNNAMED_MAJOR,0);
++ drive_info = DRIVE_INFO;
++ screen_info = SCREEN_INFO;
++ copy_edid();
++ apm_info.bios = APM_BIOS_INFO;
++ ist_info = IST_INFO;
++ saved_videomode = VIDEO_MODE;
++ if( SYS_DESC_TABLE.length != 0 ) {
++ set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2);
++ machine_id = SYS_DESC_TABLE.table[0];
++ machine_submodel_id = SYS_DESC_TABLE.table[1];
++ BIOS_revision = SYS_DESC_TABLE.table[2];
++ }
++ bootloader_type = LOADER_TYPE;
++
++ if (is_initial_xendomain()) {
++ const struct dom0_vga_console_info *info =
++ (void *)((char *)xen_start_info +
++ xen_start_info->console.dom0.info_off);
++
++ dom0_init_screen_info(info,
++ xen_start_info->console.dom0.info_size);
++ xen_start_info->console.domU.mfn = 0;
++ xen_start_info->console.domU.evtchn = 0;
++ } else
++ screen_info.orig_video_isVGA = 0;
++
++#ifdef CONFIG_BLK_DEV_RAM
++ rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
++ rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
++ rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
++#endif
++
++ ARCH_SETUP
++ if (efi_enabled)
++ efi_init();
++ else {
++ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
++ print_memory_map(machine_specific_memory_setup());
++ }
++
++ copy_edd();
++
++ if (!MOUNT_ROOT_RDONLY)
++ root_mountflags &= ~MS_RDONLY;
++ init_mm.start_code = (unsigned long) _text;
++ init_mm.end_code = (unsigned long) _etext;
++ init_mm.end_data = (unsigned long) _edata;
++ init_mm.brk = (PFN_UP(__pa(xen_start_info->pt_base)) +
++ xen_start_info->nr_pt_frames) << PAGE_SHIFT;
++
++ code_resource.start = virt_to_phys(_text);
++ code_resource.end = virt_to_phys(_etext)-1;
++ data_resource.start = virt_to_phys(_etext);
++ data_resource.end = virt_to_phys(_edata)-1;
++
++ parse_cmdline_early(cmdline_p);
++
++#ifdef CONFIG_EARLY_PRINTK
++ {
++ char *s = strstr(*cmdline_p, "earlyprintk=");
++ if (s) {
++ setup_early_printk(strchr(s, '=') + 1);
++ printk("early console enabled\n");
++ }
++ }
++#endif
++
++ max_low_pfn = setup_memory();
++
++ /*
++ * NOTE: before this point _nobody_ is allowed to allocate
++ * any memory using the bootmem allocator. Although the
++ * alloctor is now initialised only the first 8Mb of the kernel
++ * virtual address space has been mapped. All allocations before
++ * paging_init() has completed must use the alloc_bootmem_low_pages()
++ * variant (which allocates DMA'able memory) and care must be taken
++ * not to exceed the 8Mb limit.
++ */
++
++#ifdef CONFIG_SMP
++ smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
++#endif
++ paging_init();
++ remapped_pgdat_init();
++ sparse_init();
++ zone_sizes_init();
++
++#ifdef CONFIG_X86_FIND_SMP_CONFIG
++ /*
++ * Find and reserve possible boot-time SMP configuration:
++ */
++ find_smp_config();
++#endif
++
++ p2m_pages = max_pfn;
++ if (xen_start_info->nr_pages > max_pfn) {
++ /*
++ * the max_pfn was shrunk (probably by mem= or highmem=
++ * kernel parameter); shrink reservation with the HV
++ */
++ struct xen_memory_reservation reservation = {
++ .address_bits = 0,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ };
++ unsigned int difference;
++ int ret;
++
++ difference = xen_start_info->nr_pages - max_pfn;
++
++ set_xen_guest_handle(reservation.extent_start,
++ ((unsigned long *)xen_start_info->mfn_list) + max_pfn);
++ reservation.nr_extents = difference;
++ ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &reservation);
++ BUG_ON (ret != difference);
++ }
++ else if (max_pfn > xen_start_info->nr_pages)
++ p2m_pages = xen_start_info->nr_pages;
++
++ /* Make sure we have a correctly sized P->M table. */
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ phys_to_machine_mapping = alloc_bootmem_low_pages(
++ max_pfn * sizeof(unsigned long));
++ memset(phys_to_machine_mapping, ~0,
++ max_pfn * sizeof(unsigned long));
++ memcpy(phys_to_machine_mapping,
++ (unsigned long *)xen_start_info->mfn_list,
++ p2m_pages * sizeof(unsigned long));
++ free_bootmem(
++ __pa(xen_start_info->mfn_list),
++ PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
++ sizeof(unsigned long))));
++
++ /*
++ * Initialise the list of the frames that specify the list of
++ * frames that make up the p2m table. Used by save/restore
++ */
++ pfn_to_mfn_frame_list_list = alloc_bootmem_low_pages(PAGE_SIZE);
++
++ fpp = PAGE_SIZE/sizeof(unsigned long);
++ for (i=0, j=0, k=-1; i< max_pfn; i+=fpp, j++) {
++ if ((j % fpp) == 0) {
++ k++;
++ BUG_ON(k>=16);
++ pfn_to_mfn_frame_list[k] =
++ alloc_bootmem_low_pages(PAGE_SIZE);
++ pfn_to_mfn_frame_list_list[k] =
++ virt_to_mfn(pfn_to_mfn_frame_list[k]);
++ j=0;
++ }
++ pfn_to_mfn_frame_list[k][j] =
++ virt_to_mfn(&phys_to_machine_mapping[i]);
++ }
++ HYPERVISOR_shared_info->arch.max_pfn = max_pfn;
++ HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
++ virt_to_mfn(pfn_to_mfn_frame_list_list);
++ }
++
++ /* Mark all ISA DMA channels in-use - using them wouldn't work. */
++ for (i = 0; i < MAX_DMA_CHANNELS; ++i)
++ if (i != 4 && request_dma(i, "xen") != 0)
++ BUG();
++
++ /*
++ * NOTE: at this point the bootmem allocator is fully available.
++ */
++
++ if (is_initial_xendomain())
++ dmi_scan_machine();
++
++#ifdef CONFIG_X86_GENERICARCH
++ generic_apic_probe(*cmdline_p);
++#endif
++ if (efi_enabled)
++ efi_map_memmap();
++
++ set_iopl.iopl = 1;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
++
++#ifdef CONFIG_ACPI
++ if (!is_initial_xendomain()) {
++ printk(KERN_INFO "ACPI in unprivileged domain disabled\n");
++ acpi_disabled = 1;
++ acpi_ht = 0;
++ }
++
++ /*
++ * Parse the ACPI tables for possible boot-time SMP configuration.
++ */
++ acpi_boot_table_init();
++#endif
++
++#ifdef CONFIG_X86_IO_APIC
++ check_acpi_pci(); /* Checks more than just ACPI actually */
++#endif
++
++#ifdef CONFIG_ACPI
++ acpi_boot_init();
++
++#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
++ if (def_to_bigsmp)
++ printk(KERN_WARNING "More than 8 CPUs detected and "
++ "CONFIG_X86_PC cannot handle it.\nUse "
++ "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
++#endif
++#endif
++#ifdef CONFIG_X86_LOCAL_APIC
++ if (smp_found_config)
++ get_smp_config();
++#endif
++
++ register_memory();
++
++ if (is_initial_xendomain()) {
++#ifdef CONFIG_VT
++#if defined(CONFIG_VGA_CONSOLE)
++ if (!efi_enabled ||
++ (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
++ conswitchp = &vga_con;
++#elif defined(CONFIG_DUMMY_CONSOLE)
++ conswitchp = &dummy_con;
++#endif
++#endif
++ } else {
++#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
++ conswitchp = &dummy_con;
++#endif
++ }
++ tsc_init();
++}
++
++static int
++xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
++{
++ HYPERVISOR_shutdown(SHUTDOWN_crash);
++ /* we're never actually going to get here... */
++ return NOTIFY_DONE;
++}
++
++static __init int add_pcspkr(void)
++{
++ struct platform_device *pd;
++ int ret;
++
++ if (!is_initial_xendomain())
++ return 0;
++
++ pd = platform_device_alloc("pcspkr", -1);
++ if (!pd)
++ return -ENOMEM;
++
++ ret = platform_device_add(pd);
++ if (ret)
++ platform_device_put(pd);
++
++ return ret;
++}
++device_initcall(add_pcspkr);
++
++/*
++ * Local Variables:
++ * mode:c
++ * c-file-style:"k&r"
++ * c-basic-offset:8
++ * End:
++ */
+Index: head-2008-11-25/arch/x86/kernel/smp_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/smp_32-xen.c 2007-12-10 08:47:31.000000000 +0100
+@@ -0,0 +1,605 @@
++/*
++ * Intel SMP support routines.
++ *
++ * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
++ * (c) 1998-99, 2000 Ingo Molnar <mingo@redhat.com>
++ *
++ * This code is released under the GNU General Public License version 2 or
++ * later.
++ */
++
++#include <linux/init.h>
++
++#include <linux/mm.h>
++#include <linux/delay.h>
++#include <linux/spinlock.h>
++#include <linux/smp_lock.h>
++#include <linux/kernel_stat.h>
++#include <linux/mc146818rtc.h>
++#include <linux/cache.h>
++#include <linux/interrupt.h>
++#include <linux/cpu.h>
++#include <linux/module.h>
++
++#include <asm/mtrr.h>
++#include <asm/tlbflush.h>
++#if 0
++#include <mach_apic.h>
++#endif
++#include <xen/evtchn.h>
++
++/*
++ * Some notes on x86 processor bugs affecting SMP operation:
++ *
++ * Pentium, Pentium Pro, II, III (and all CPUs) have bugs.
++ * The Linux implications for SMP are handled as follows:
++ *
++ * Pentium III / [Xeon]
++ * None of the E1AP-E3AP errata are visible to the user.
++ *
++ * E1AP. see PII A1AP
++ * E2AP. see PII A2AP
++ * E3AP. see PII A3AP
++ *
++ * Pentium II / [Xeon]
++ * None of the A1AP-A3AP errata are visible to the user.
++ *
++ * A1AP. see PPro 1AP
++ * A2AP. see PPro 2AP
++ * A3AP. see PPro 7AP
++ *
++ * Pentium Pro
++ * None of 1AP-9AP errata are visible to the normal user,
++ * except occasional delivery of 'spurious interrupt' as trap #15.
++ * This is very rare and a non-problem.
++ *
++ * 1AP. Linux maps APIC as non-cacheable
++ * 2AP. worked around in hardware
++ * 3AP. fixed in C0 and above steppings microcode update.
++ * Linux does not use excessive STARTUP_IPIs.
++ * 4AP. worked around in hardware
++ * 5AP. symmetric IO mode (normal Linux operation) not affected.
++ * 'noapic' mode has vector 0xf filled out properly.
++ * 6AP. 'noapic' mode might be affected - fixed in later steppings
++ * 7AP. We do not assume writes to the LVT deassering IRQs
++ * 8AP. We do not enable low power mode (deep sleep) during MP bootup
++ * 9AP. We do not use mixed mode
++ *
++ * Pentium
++ * There is a marginal case where REP MOVS on 100MHz SMP
++ * machines with B stepping processors can fail. XXX should provide
++ * an L1cache=Writethrough or L1cache=off option.
++ *
++ * B stepping CPUs may hang. There are hardware work arounds
++ * for this. We warn about it in case your board doesn't have the work
++ * arounds. Basically thats so I can tell anyone with a B stepping
++ * CPU and SMP problems "tough".
++ *
++ * Specific items [From Pentium Processor Specification Update]
++ *
++ * 1AP. Linux doesn't use remote read
++ * 2AP. Linux doesn't trust APIC errors
++ * 3AP. We work around this
++ * 4AP. Linux never generated 3 interrupts of the same priority
++ * to cause a lost local interrupt.
++ * 5AP. Remote read is never used
++ * 6AP. not affected - worked around in hardware
++ * 7AP. not affected - worked around in hardware
++ * 8AP. worked around in hardware - we get explicit CS errors if not
++ * 9AP. only 'noapic' mode affected. Might generate spurious
++ * interrupts, we log only the first one and count the
++ * rest silently.
++ * 10AP. not affected - worked around in hardware
++ * 11AP. Linux reads the APIC between writes to avoid this, as per
++ * the documentation. Make sure you preserve this as it affects
++ * the C stepping chips too.
++ * 12AP. not affected - worked around in hardware
++ * 13AP. not affected - worked around in hardware
++ * 14AP. we always deassert INIT during bootup
++ * 15AP. not affected - worked around in hardware
++ * 16AP. not affected - worked around in hardware
++ * 17AP. not affected - worked around in hardware
++ * 18AP. not affected - worked around in hardware
++ * 19AP. not affected - worked around in BIOS
++ *
++ * If this sounds worrying believe me these bugs are either ___RARE___,
++ * or are signal timing bugs worked around in hardware and there's
++ * about nothing of note with C stepping upwards.
++ */
++
++DEFINE_PER_CPU(struct tlb_state, cpu_tlbstate) ____cacheline_aligned = { &init_mm, 0, };
++
++/*
++ * the following functions deal with sending IPIs between CPUs.
++ *
++ * We use 'broadcast', CPU->CPU IPIs and self-IPIs too.
++ */
++
++static inline int __prepare_ICR (unsigned int shortcut, int vector)
++{
++ unsigned int icr = shortcut | APIC_DEST_LOGICAL;
++
++ switch (vector) {
++ default:
++ icr |= APIC_DM_FIXED | vector;
++ break;
++ case NMI_VECTOR:
++ icr |= APIC_DM_NMI;
++ break;
++ }
++ return icr;
++}
++
++static inline int __prepare_ICR2 (unsigned int mask)
++{
++ return SET_APIC_DEST_FIELD(mask);
++}
++
++DECLARE_PER_CPU(int, ipi_to_irq[NR_IPIS]);
++
++static inline void __send_IPI_one(unsigned int cpu, int vector)
++{
++ int irq = per_cpu(ipi_to_irq, cpu)[vector];
++ BUG_ON(irq < 0);
++ notify_remote_via_irq(irq);
++}
++
++void __send_IPI_shortcut(unsigned int shortcut, int vector)
++{
++ int cpu;
++
++ switch (shortcut) {
++ case APIC_DEST_SELF:
++ __send_IPI_one(smp_processor_id(), vector);
++ break;
++ case APIC_DEST_ALLBUT:
++ for (cpu = 0; cpu < NR_CPUS; ++cpu) {
++ if (cpu == smp_processor_id())
++ continue;
++ if (cpu_isset(cpu, cpu_online_map)) {
++ __send_IPI_one(cpu, vector);
++ }
++ }
++ break;
++ default:
++ printk("XXXXXX __send_IPI_shortcut %08x vector %d\n", shortcut,
++ vector);
++ break;
++ }
++}
++
++void fastcall send_IPI_self(int vector)
++{
++ __send_IPI_shortcut(APIC_DEST_SELF, vector);
++}
++
++/*
++ * This is only used on smaller machines.
++ */
++void send_IPI_mask_bitmask(cpumask_t mask, int vector)
++{
++ unsigned long flags;
++ unsigned int cpu;
++
++ local_irq_save(flags);
++ WARN_ON(cpus_addr(mask)[0] & ~cpus_addr(cpu_online_map)[0]);
++
++ for (cpu = 0; cpu < NR_CPUS; ++cpu) {
++ if (cpu_isset(cpu, mask)) {
++ __send_IPI_one(cpu, vector);
++ }
++ }
++
++ local_irq_restore(flags);
++}
++
++void send_IPI_mask_sequence(cpumask_t mask, int vector)
++{
++
++ send_IPI_mask_bitmask(mask, vector);
++}
++
++#include <mach_ipi.h> /* must come after the send_IPI functions above for inlining */
++
++#if 0 /* XEN */
++/*
++ * Smarter SMP flushing macros.
++ * c/o Linus Torvalds.
++ *
++ * These mean you can really definitely utterly forget about
++ * writing to user space from interrupts. (Its not allowed anyway).
++ *
++ * Optimizations Manfred Spraul <manfred@colorfullife.com>
++ */
++
++static cpumask_t flush_cpumask;
++static struct mm_struct * flush_mm;
++static unsigned long flush_va;
++static DEFINE_SPINLOCK(tlbstate_lock);
++#define FLUSH_ALL 0xffffffff
++
++/*
++ * We cannot call mmdrop() because we are in interrupt context,
++ * instead update mm->cpu_vm_mask.
++ *
++ * We need to reload %cr3 since the page tables may be going
++ * away from under us..
++ */
++static inline void leave_mm (unsigned long cpu)
++{
++ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
++ BUG();
++ cpu_clear(cpu, per_cpu(cpu_tlbstate, cpu).active_mm->cpu_vm_mask);
++ load_cr3(swapper_pg_dir);
++}
++
++/*
++ *
++ * The flush IPI assumes that a thread switch happens in this order:
++ * [cpu0: the cpu that switches]
++ * 1) switch_mm() either 1a) or 1b)
++ * 1a) thread switch to a different mm
++ * 1a1) cpu_clear(cpu, old_mm->cpu_vm_mask);
++ * Stop ipi delivery for the old mm. This is not synchronized with
++ * the other cpus, but smp_invalidate_interrupt ignore flush ipis
++ * for the wrong mm, and in the worst case we perform a superflous
++ * tlb flush.
++ * 1a2) set cpu_tlbstate to TLBSTATE_OK
++ * Now the smp_invalidate_interrupt won't call leave_mm if cpu0
++ * was in lazy tlb mode.
++ * 1a3) update cpu_tlbstate[].active_mm
++ * Now cpu0 accepts tlb flushes for the new mm.
++ * 1a4) cpu_set(cpu, new_mm->cpu_vm_mask);
++ * Now the other cpus will send tlb flush ipis.
++ * 1a4) change cr3.
++ * 1b) thread switch without mm change
++ * cpu_tlbstate[].active_mm is correct, cpu0 already handles
++ * flush ipis.
++ * 1b1) set cpu_tlbstate to TLBSTATE_OK
++ * 1b2) test_and_set the cpu bit in cpu_vm_mask.
++ * Atomically set the bit [other cpus will start sending flush ipis],
++ * and test the bit.
++ * 1b3) if the bit was 0: leave_mm was called, flush the tlb.
++ * 2) switch %%esp, ie current
++ *
++ * The interrupt must handle 2 special cases:
++ * - cr3 is changed before %%esp, ie. it cannot use current->{active_,}mm.
++ * - the cpu performs speculative tlb reads, i.e. even if the cpu only
++ * runs in kernel space, the cpu could load tlb entries for user space
++ * pages.
++ *
++ * The good news is that cpu_tlbstate is local to each cpu, no
++ * write/read ordering problems.
++ */
++
++/*
++ * TLB flush IPI:
++ *
++ * 1) Flush the tlb entries if the cpu uses the mm that's being flushed.
++ * 2) Leave the mm if we are in the lazy tlb mode.
++ */
++
++irqreturn_t smp_invalidate_interrupt(int irq, void *dev_id,
++ struct pt_regs *regs)
++{
++ unsigned long cpu;
++
++ cpu = get_cpu();
++
++ if (!cpu_isset(cpu, flush_cpumask))
++ goto out;
++ /*
++ * This was a BUG() but until someone can quote me the
++ * line from the intel manual that guarantees an IPI to
++ * multiple CPUs is retried _only_ on the erroring CPUs
++ * its staying as a return
++ *
++ * BUG();
++ */
++
++ if (flush_mm == per_cpu(cpu_tlbstate, cpu).active_mm) {
++ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK) {
++ if (flush_va == FLUSH_ALL)
++ local_flush_tlb();
++ else
++ __flush_tlb_one(flush_va);
++ } else
++ leave_mm(cpu);
++ }
++ smp_mb__before_clear_bit();
++ cpu_clear(cpu, flush_cpumask);
++ smp_mb__after_clear_bit();
++out:
++ put_cpu_no_resched();
++
++ return IRQ_HANDLED;
++}
++
++static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
++ unsigned long va)
++{
++ /*
++ * A couple of (to be removed) sanity checks:
++ *
++ * - current CPU must not be in mask
++ * - mask must exist :)
++ */
++ BUG_ON(cpus_empty(cpumask));
++ BUG_ON(cpu_isset(smp_processor_id(), cpumask));
++ BUG_ON(!mm);
++
++ /* If a CPU which we ran on has gone down, OK. */
++ cpus_and(cpumask, cpumask, cpu_online_map);
++ if (cpus_empty(cpumask))
++ return;
++
++ /*
++ * i'm not happy about this global shared spinlock in the
++ * MM hot path, but we'll see how contended it is.
++ * Temporarily this turns IRQs off, so that lockups are
++ * detected by the NMI watchdog.
++ */
++ spin_lock(&tlbstate_lock);
++
++ flush_mm = mm;
++ flush_va = va;
++#if NR_CPUS <= BITS_PER_LONG
++ atomic_set_mask(cpumask, &flush_cpumask);
++#else
++ {
++ int k;
++ unsigned long *flush_mask = (unsigned long *)&flush_cpumask;
++ unsigned long *cpu_mask = (unsigned long *)&cpumask;
++ for (k = 0; k < BITS_TO_LONGS(NR_CPUS); ++k)
++ atomic_set_mask(cpu_mask[k], &flush_mask[k]);
++ }
++#endif
++ /*
++ * We have to send the IPI only to
++ * CPUs affected.
++ */
++ send_IPI_mask(cpumask, INVALIDATE_TLB_VECTOR);
++
++ while (!cpus_empty(flush_cpumask))
++ /* nothing. lockup detection does not belong here */
++ mb();
++
++ flush_mm = NULL;
++ flush_va = 0;
++ spin_unlock(&tlbstate_lock);
++}
++
++void flush_tlb_current_task(void)
++{
++ struct mm_struct *mm = current->mm;
++ cpumask_t cpu_mask;
++
++ preempt_disable();
++ cpu_mask = mm->cpu_vm_mask;
++ cpu_clear(smp_processor_id(), cpu_mask);
++
++ local_flush_tlb();
++ if (!cpus_empty(cpu_mask))
++ flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
++ preempt_enable();
++}
++
++void flush_tlb_mm (struct mm_struct * mm)
++{
++ cpumask_t cpu_mask;
++
++ preempt_disable();
++ cpu_mask = mm->cpu_vm_mask;
++ cpu_clear(smp_processor_id(), cpu_mask);
++
++ if (current->active_mm == mm) {
++ if (current->mm)
++ local_flush_tlb();
++ else
++ leave_mm(smp_processor_id());
++ }
++ if (!cpus_empty(cpu_mask))
++ flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
++
++ preempt_enable();
++}
++
++void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
++{
++ struct mm_struct *mm = vma->vm_mm;
++ cpumask_t cpu_mask;
++
++ preempt_disable();
++ cpu_mask = mm->cpu_vm_mask;
++ cpu_clear(smp_processor_id(), cpu_mask);
++
++ if (current->active_mm == mm) {
++ if(current->mm)
++ __flush_tlb_one(va);
++ else
++ leave_mm(smp_processor_id());
++ }
++
++ if (!cpus_empty(cpu_mask))
++ flush_tlb_others(cpu_mask, mm, va);
++
++ preempt_enable();
++}
++EXPORT_SYMBOL(flush_tlb_page);
++
++static void do_flush_tlb_all(void* info)
++{
++ unsigned long cpu = smp_processor_id();
++
++ __flush_tlb_all();
++ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_LAZY)
++ leave_mm(cpu);
++}
++
++void flush_tlb_all(void)
++{
++ on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
++}
++
++#endif /* XEN */
++
++/*
++ * this function sends a 'reschedule' IPI to another CPU.
++ * it goes straight through and wastes no time serializing
++ * anything. Worst case is that we lose a reschedule ...
++ */
++void smp_send_reschedule(int cpu)
++{
++ WARN_ON(cpu_is_offline(cpu));
++ send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
++}
++
++/*
++ * Structure and data for smp_call_function(). This is designed to minimise
++ * static memory requirements. It also looks cleaner.
++ */
++static DEFINE_SPINLOCK(call_lock);
++
++struct call_data_struct {
++ void (*func) (void *info);
++ void *info;
++ atomic_t started;
++ atomic_t finished;
++ int wait;
++};
++
++void lock_ipi_call_lock(void)
++{
++ spin_lock_irq(&call_lock);
++}
++
++void unlock_ipi_call_lock(void)
++{
++ spin_unlock_irq(&call_lock);
++}
++
++static struct call_data_struct *call_data;
++
++/**
++ * smp_call_function(): Run a function on all other CPUs.
++ * @func: The function to run. This must be fast and non-blocking.
++ * @info: An arbitrary pointer to pass to the function.
++ * @nonatomic: currently unused.
++ * @wait: If true, wait (atomically) until function has completed on other CPUs.
++ *
++ * Returns 0 on success, else a negative status code. Does not return until
++ * remote CPUs are nearly ready to execute <<func>> or are or have executed.
++ *
++ * You must not call this function with disabled interrupts or from a
++ * hardware interrupt handler or from a bottom half handler.
++ */
++int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
++ int wait)
++{
++ struct call_data_struct data;
++ int cpus;
++
++ /* Holding any lock stops cpus from going down. */
++ spin_lock(&call_lock);
++ cpus = num_online_cpus() - 1;
++ if (!cpus) {
++ spin_unlock(&call_lock);
++ return 0;
++ }
++
++ /* Can deadlock when called with interrupts disabled */
++ WARN_ON(irqs_disabled());
++
++ data.func = func;
++ data.info = info;
++ atomic_set(&data.started, 0);
++ data.wait = wait;
++ if (wait)
++ atomic_set(&data.finished, 0);
++
++ call_data = &data;
++ mb();
++
++ /* Send a message to all other CPUs and wait for them to respond */
++ send_IPI_allbutself(CALL_FUNCTION_VECTOR);
++
++ /* Wait for response */
++ while (atomic_read(&data.started) != cpus)
++ cpu_relax();
++
++ if (wait)
++ while (atomic_read(&data.finished) != cpus)
++ cpu_relax();
++ spin_unlock(&call_lock);
++
++ return 0;
++}
++EXPORT_SYMBOL(smp_call_function);
++
++static void stop_this_cpu (void * dummy)
++{
++ /*
++ * Remove this CPU:
++ */
++ cpu_clear(smp_processor_id(), cpu_online_map);
++ local_irq_disable();
++ disable_all_local_evtchn();
++ if (cpu_data[smp_processor_id()].hlt_works_ok)
++ for(;;) halt();
++ for (;;);
++}
++
++/*
++ * this function calls the 'stop' function on all other CPUs in the system.
++ */
++
++void smp_send_stop(void)
++{
++ smp_call_function(stop_this_cpu, NULL, 1, 0);
++
++ local_irq_disable();
++ disable_all_local_evtchn();
++ local_irq_enable();
++}
++
++/*
++ * Reschedule call back. Nothing to do,
++ * all the work is done automatically when
++ * we return from the interrupt.
++ */
++irqreturn_t smp_reschedule_interrupt(int irq, void *dev_id,
++ struct pt_regs *regs)
++{
++
++ return IRQ_HANDLED;
++}
++
++#include <linux/kallsyms.h>
++irqreturn_t smp_call_function_interrupt(int irq, void *dev_id,
++ struct pt_regs *regs)
++{
++ void (*func) (void *info) = call_data->func;
++ void *info = call_data->info;
++ int wait = call_data->wait;
++
++ /*
++ * Notify initiating CPU that I've grabbed the data and am
++ * about to execute the function
++ */
++ mb();
++ atomic_inc(&call_data->started);
++ /*
++ * At this point the info structure may be out of scope unless wait==1
++ */
++ irq_enter();
++ (*func)(info);
++ irq_exit();
++
++ if (wait) {
++ mb();
++ atomic_inc(&call_data->finished);
++ }
++
++ return IRQ_HANDLED;
++}
++
+Index: head-2008-11-25/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/time_32-xen.c 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,1209 @@
++/*
++ * linux/arch/i386/kernel/time.c
++ *
++ * Copyright (C) 1991, 1992, 1995 Linus Torvalds
++ *
++ * This file contains the PC-specific time handling details:
++ * reading the RTC at bootup, etc..
++ * 1994-07-02 Alan Modra
++ * fixed set_rtc_mmss, fixed time.year for >= 2000, new mktime
++ * 1995-03-26 Markus Kuhn
++ * fixed 500 ms bug at call to set_rtc_mmss, fixed DS12887
++ * precision CMOS clock update
++ * 1996-05-03 Ingo Molnar
++ * fixed time warps in do_[slow|fast]_gettimeoffset()
++ * 1997-09-10 Updated NTP code according to technical memorandum Jan '96
++ * "A Kernel Model for Precision Timekeeping" by Dave Mills
++ * 1998-09-05 (Various)
++ * More robust do_fast_gettimeoffset() algorithm implemented
++ * (works with APM, Cyrix 6x86MX and Centaur C6),
++ * monotonic gettimeofday() with fast_get_timeoffset(),
++ * drift-proof precision TSC calibration on boot
++ * (C. Scott Ananian <cananian@alumni.princeton.edu>, Andrew D.
++ * Balsa <andrebalsa@altern.org>, Philip Gladstone <philip@raptor.com>;
++ * ported from 2.0.35 Jumbo-9 by Michael Krause <m.krause@tu-harburg.de>).
++ * 1998-12-16 Andrea Arcangeli
++ * Fixed Jumbo-9 code in 2.1.131: do_gettimeofday was missing 1 jiffy
++ * because was not accounting lost_ticks.
++ * 1998-12-24 Copyright (C) 1998 Andrea Arcangeli
++ * Fixed a xtime SMP race (we need the xtime_lock rw spinlock to
++ * serialize accesses to xtime/lost_ticks).
++ */
++
++#include <linux/errno.h>
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/param.h>
++#include <linux/string.h>
++#include <linux/mm.h>
++#include <linux/interrupt.h>
++#include <linux/time.h>
++#include <linux/delay.h>
++#include <linux/init.h>
++#include <linux/smp.h>
++#include <linux/module.h>
++#include <linux/sysdev.h>
++#include <linux/bcd.h>
++#include <linux/efi.h>
++#include <linux/mca.h>
++#include <linux/sysctl.h>
++#include <linux/percpu.h>
++#include <linux/kernel_stat.h>
++#include <linux/posix-timers.h>
++#include <linux/cpufreq.h>
++
++#include <asm/io.h>
++#include <asm/smp.h>
++#include <asm/irq.h>
++#include <asm/msr.h>
++#include <asm/delay.h>
++#include <asm/mpspec.h>
++#include <asm/uaccess.h>
++#include <asm/processor.h>
++#include <asm/timer.h>
++#include <asm/sections.h>
++
++#include "mach_time.h"
++
++#include <linux/timex.h>
++
++#include <asm/hpet.h>
++
++#include <asm/arch_hooks.h>
++
++#include <xen/evtchn.h>
++#include <xen/interface/vcpu.h>
++
++#if defined (__i386__)
++#include <asm/i8259.h>
++#endif
++
++int pit_latch_buggy; /* extern */
++
++#if defined(__x86_64__)
++unsigned long vxtime_hz = PIT_TICK_RATE;
++struct vxtime_data __vxtime __section_vxtime; /* for vsyscalls */
++volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
++unsigned long __wall_jiffies __section_wall_jiffies = INITIAL_JIFFIES;
++struct timespec __xtime __section_xtime;
++struct timezone __sys_tz __section_sys_tz;
++#endif
++
++unsigned int cpu_khz; /* Detected as we calibrate the TSC */
++EXPORT_SYMBOL(cpu_khz);
++
++extern unsigned long wall_jiffies;
++
++DEFINE_SPINLOCK(rtc_lock);
++EXPORT_SYMBOL(rtc_lock);
++
++extern struct init_timer_opts timer_tsc_init;
++extern struct timer_opts timer_tsc;
++#define timer_none timer_tsc
++
++/* These are peridically updated in shared_info, and then copied here. */
++struct shadow_time_info {
++ u64 tsc_timestamp; /* TSC at last update of time vals. */
++ u64 system_timestamp; /* Time, in nanosecs, since boot. */
++ u32 tsc_to_nsec_mul;
++ u32 tsc_to_usec_mul;
++ int tsc_shift;
++ u32 version;
++};
++static DEFINE_PER_CPU(struct shadow_time_info, shadow_time);
++static struct timespec shadow_tv;
++static u32 shadow_tv_version;
++
++static struct timeval monotonic_tv;
++static spinlock_t monotonic_lock = SPIN_LOCK_UNLOCKED;
++
++/* Keep track of last time we did processing/updating of jiffies and xtime. */
++static u64 processed_system_time; /* System time (ns) at last processing. */
++static DEFINE_PER_CPU(u64, processed_system_time);
++
++/* How much CPU time was spent blocked and how much was 'stolen'? */
++static DEFINE_PER_CPU(u64, processed_stolen_time);
++static DEFINE_PER_CPU(u64, processed_blocked_time);
++
++/* Current runstate of each CPU (updated automatically by the hypervisor). */
++static DEFINE_PER_CPU(struct vcpu_runstate_info, runstate);
++
++/* Must be signed, as it's compared with s64 quantities which can be -ve. */
++#define NS_PER_TICK (1000000000LL/HZ)
++
++static void __clock_was_set(void *unused)
++{
++ clock_was_set();
++}
++static DECLARE_WORK(clock_was_set_work, __clock_was_set, NULL);
++
++/*
++ * GCC 4.3 can turn loops over an induction variable into division. We do
++ * not support arbitrary 64-bit division, and so must break the induction.
++ */
++#define clobber_induction_variable(v) asm ( "" : "+r" (v) )
++
++static inline void __normalize_time(time_t *sec, s64 *nsec)
++{
++ while (*nsec >= NSEC_PER_SEC) {
++ clobber_induction_variable(*nsec);
++ (*nsec) -= NSEC_PER_SEC;
++ (*sec)++;
++ }
++ while (*nsec < 0) {
++ clobber_induction_variable(*nsec);
++ (*nsec) += NSEC_PER_SEC;
++ (*sec)--;
++ }
++}
++
++/* Does this guest OS track Xen time, or set its wall clock independently? */
++static int independent_wallclock = 0;
++static int __init __independent_wallclock(char *str)
++{
++ independent_wallclock = 1;
++ return 1;
++}
++__setup("independent_wallclock", __independent_wallclock);
++
++/* Permitted clock jitter, in nsecs, beyond which a warning will be printed. */
++static unsigned long permitted_clock_jitter = 10000000UL; /* 10ms */
++static int __init __permitted_clock_jitter(char *str)
++{
++ permitted_clock_jitter = simple_strtoul(str, NULL, 0);
++ return 1;
++}
++__setup("permitted_clock_jitter=", __permitted_clock_jitter);
++
++#if 0
++static void delay_tsc(unsigned long loops)
++{
++ unsigned long bclock, now;
++
++ rdtscl(bclock);
++ do {
++ rep_nop();
++ rdtscl(now);
++ } while ((now - bclock) < loops);
++}
++
++struct timer_opts timer_tsc = {
++ .name = "tsc",
++ .delay = delay_tsc,
++};
++#endif
++
++/*
++ * Scale a 64-bit delta by scaling and multiplying by a 32-bit fraction,
++ * yielding a 64-bit result.
++ */
++static inline u64 scale_delta(u64 delta, u32 mul_frac, int shift)
++{
++ u64 product;
++#ifdef __i386__
++ u32 tmp1, tmp2;
++#endif
++
++ if (shift < 0)
++ delta >>= -shift;
++ else
++ delta <<= shift;
++
++#ifdef __i386__
++ __asm__ (
++ "mul %5 ; "
++ "mov %4,%%eax ; "
++ "mov %%edx,%4 ; "
++ "mul %5 ; "
++ "xor %5,%5 ; "
++ "add %4,%%eax ; "
++ "adc %5,%%edx ; "
++ : "=A" (product), "=r" (tmp1), "=r" (tmp2)
++ : "a" ((u32)delta), "1" ((u32)(delta >> 32)), "2" (mul_frac) );
++#else
++ __asm__ (
++ "mul %%rdx ; shrd $32,%%rdx,%%rax"
++ : "=a" (product) : "0" (delta), "d" ((u64)mul_frac) );
++#endif
++
++ return product;
++}
++
++#if 0 /* defined (__i386__) */
++int read_current_timer(unsigned long *timer_val)
++{
++ rdtscl(*timer_val);
++ return 0;
++}
++#endif
++
++void init_cpu_khz(void)
++{
++ u64 __cpu_khz = 1000000ULL << 32;
++ struct vcpu_time_info *info = &vcpu_info(0)->time;
++ do_div(__cpu_khz, info->tsc_to_system_mul);
++ if (info->tsc_shift < 0)
++ cpu_khz = __cpu_khz << -info->tsc_shift;
++ else
++ cpu_khz = __cpu_khz >> info->tsc_shift;
++}
++
++static u64 get_nsec_offset(struct shadow_time_info *shadow)
++{
++ u64 now, delta;
++ rdtscll(now);
++ delta = now - shadow->tsc_timestamp;
++ return scale_delta(delta, shadow->tsc_to_nsec_mul, shadow->tsc_shift);
++}
++
++static unsigned long get_usec_offset(struct shadow_time_info *shadow)
++{
++ u64 now, delta;
++ rdtscll(now);
++ delta = now - shadow->tsc_timestamp;
++ return scale_delta(delta, shadow->tsc_to_usec_mul, shadow->tsc_shift);
++}
++
++static void __update_wallclock(time_t sec, long nsec)
++{
++ long wtm_nsec, xtime_nsec;
++ time_t wtm_sec, xtime_sec;
++ u64 tmp, wc_nsec;
++
++ /* Adjust wall-clock time base based on wall_jiffies ticks. */
++ wc_nsec = processed_system_time;
++ wc_nsec += sec * (u64)NSEC_PER_SEC;
++ wc_nsec += nsec;
++ wc_nsec -= (jiffies - wall_jiffies) * (u64)NS_PER_TICK;
++
++ /* Split wallclock base into seconds and nanoseconds. */
++ tmp = wc_nsec;
++ xtime_nsec = do_div(tmp, 1000000000);
++ xtime_sec = (time_t)tmp;
++
++ wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - xtime_sec);
++ wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - xtime_nsec);
++
++ set_normalized_timespec(&xtime, xtime_sec, xtime_nsec);
++ set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
++
++ ntp_clear();
++}
++
++static void update_wallclock(void)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++
++ do {
++ shadow_tv_version = s->wc_version;
++ rmb();
++ shadow_tv.tv_sec = s->wc_sec;
++ shadow_tv.tv_nsec = s->wc_nsec;
++ rmb();
++ } while ((s->wc_version & 1) | (shadow_tv_version ^ s->wc_version));
++
++ if (!independent_wallclock)
++ __update_wallclock(shadow_tv.tv_sec, shadow_tv.tv_nsec);
++}
++
++/*
++ * Reads a consistent set of time-base values from Xen, into a shadow data
++ * area.
++ */
++static void get_time_values_from_xen(unsigned int cpu)
++{
++ struct vcpu_time_info *src;
++ struct shadow_time_info *dst;
++ unsigned long flags;
++ u32 pre_version, post_version;
++
++ src = &vcpu_info(cpu)->time;
++ dst = &per_cpu(shadow_time, cpu);
++
++ local_irq_save(flags);
++
++ do {
++ pre_version = dst->version = src->version;
++ rmb();
++ dst->tsc_timestamp = src->tsc_timestamp;
++ dst->system_timestamp = src->system_time;
++ dst->tsc_to_nsec_mul = src->tsc_to_system_mul;
++ dst->tsc_shift = src->tsc_shift;
++ rmb();
++ post_version = src->version;
++ } while ((pre_version & 1) | (pre_version ^ post_version));
++
++ dst->tsc_to_usec_mul = dst->tsc_to_nsec_mul / 1000;
++
++ local_irq_restore(flags);
++}
++
++static inline int time_values_up_to_date(unsigned int cpu)
++{
++ struct vcpu_time_info *src;
++ struct shadow_time_info *dst;
++
++ src = &vcpu_info(cpu)->time;
++ dst = &per_cpu(shadow_time, cpu);
++
++ rmb();
++ return (dst->version == src->version);
++}
++
++/*
++ * This is a special lock that is owned by the CPU and holds the index
++ * register we are working with. It is required for NMI access to the
++ * CMOS/RTC registers. See include/asm-i386/mc146818rtc.h for details.
++ */
++volatile unsigned long cmos_lock = 0;
++EXPORT_SYMBOL(cmos_lock);
++
++/* Routines for accessing the CMOS RAM/RTC. */
++unsigned char rtc_cmos_read(unsigned char addr)
++{
++ unsigned char val;
++ lock_cmos_prefix(addr);
++ outb_p(addr, RTC_PORT(0));
++ val = inb_p(RTC_PORT(1));
++ lock_cmos_suffix(addr);
++ return val;
++}
++EXPORT_SYMBOL(rtc_cmos_read);
++
++void rtc_cmos_write(unsigned char val, unsigned char addr)
++{
++ lock_cmos_prefix(addr);
++ outb_p(addr, RTC_PORT(0));
++ outb_p(val, RTC_PORT(1));
++ lock_cmos_suffix(addr);
++}
++EXPORT_SYMBOL(rtc_cmos_write);
++
++/*
++ * This version of gettimeofday has microsecond resolution
++ * and better than microsecond precision on fast x86 machines with TSC.
++ */
++void do_gettimeofday(struct timeval *tv)
++{
++ unsigned long seq;
++ unsigned long usec, sec;
++ unsigned long flags;
++ s64 nsec;
++ unsigned int cpu;
++ struct shadow_time_info *shadow;
++ u32 local_time_version;
++
++ cpu = get_cpu();
++ shadow = &per_cpu(shadow_time, cpu);
++
++ do {
++ unsigned long lost;
++
++ local_time_version = shadow->version;
++ seq = read_seqbegin(&xtime_lock);
++
++ usec = get_usec_offset(shadow);
++ lost = jiffies - wall_jiffies;
++
++ if (unlikely(lost))
++ usec += lost * (USEC_PER_SEC / HZ);
++
++ sec = xtime.tv_sec;
++ usec += (xtime.tv_nsec / NSEC_PER_USEC);
++
++ nsec = shadow->system_timestamp - processed_system_time;
++ __normalize_time(&sec, &nsec);
++ usec += (long)nsec / NSEC_PER_USEC;
++
++ if (unlikely(!time_values_up_to_date(cpu))) {
++ /*
++ * We may have blocked for a long time,
++ * rendering our calculations invalid
++ * (e.g. the time delta may have
++ * overflowed). Detect that and recalculate
++ * with fresh values.
++ */
++ get_time_values_from_xen(cpu);
++ continue;
++ }
++ } while (read_seqretry(&xtime_lock, seq) ||
++ (local_time_version != shadow->version));
++
++ put_cpu();
++
++ while (usec >= USEC_PER_SEC) {
++ usec -= USEC_PER_SEC;
++ sec++;
++ }
++
++ spin_lock_irqsave(&monotonic_lock, flags);
++ if ((sec > monotonic_tv.tv_sec) ||
++ ((sec == monotonic_tv.tv_sec) && (usec > monotonic_tv.tv_usec)))
++ {
++ monotonic_tv.tv_sec = sec;
++ monotonic_tv.tv_usec = usec;
++ } else {
++ sec = monotonic_tv.tv_sec;
++ usec = monotonic_tv.tv_usec;
++ }
++ spin_unlock_irqrestore(&monotonic_lock, flags);
++
++ tv->tv_sec = sec;
++ tv->tv_usec = usec;
++}
++
++EXPORT_SYMBOL(do_gettimeofday);
++
++int do_settimeofday(struct timespec *tv)
++{
++ time_t sec;
++ s64 nsec;
++ unsigned int cpu;
++ struct shadow_time_info *shadow;
++ struct xen_platform_op op;
++
++ if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
++ return -EINVAL;
++
++ cpu = get_cpu();
++ shadow = &per_cpu(shadow_time, cpu);
++
++ write_seqlock_irq(&xtime_lock);
++
++ /*
++ * Ensure we don't get blocked for a long time so that our time delta
++ * overflows. If that were to happen then our shadow time values would
++ * be stale, so we can retry with fresh ones.
++ */
++ for (;;) {
++ nsec = tv->tv_nsec - get_nsec_offset(shadow);
++ if (time_values_up_to_date(cpu))
++ break;
++ get_time_values_from_xen(cpu);
++ }
++ sec = tv->tv_sec;
++ __normalize_time(&sec, &nsec);
++
++ if (is_initial_xendomain() && !independent_wallclock) {
++ op.cmd = XENPF_settime;
++ op.u.settime.secs = sec;
++ op.u.settime.nsecs = nsec;
++ op.u.settime.system_time = shadow->system_timestamp;
++ WARN_ON(HYPERVISOR_platform_op(&op));
++ update_wallclock();
++ } else if (independent_wallclock) {
++ nsec -= shadow->system_timestamp;
++ __normalize_time(&sec, &nsec);
++ __update_wallclock(sec, nsec);
++ }
++
++ /* Reset monotonic gettimeofday() timeval. */
++ spin_lock(&monotonic_lock);
++ monotonic_tv.tv_sec = 0;
++ monotonic_tv.tv_usec = 0;
++ spin_unlock(&monotonic_lock);
++
++ write_sequnlock_irq(&xtime_lock);
++
++ put_cpu();
++
++ clock_was_set();
++ return 0;
++}
++
++EXPORT_SYMBOL(do_settimeofday);
++
++static void sync_xen_wallclock(unsigned long dummy);
++static DEFINE_TIMER(sync_xen_wallclock_timer, sync_xen_wallclock, 0, 0);
++static void sync_xen_wallclock(unsigned long dummy)
++{
++ time_t sec;
++ s64 nsec;
++ struct xen_platform_op op;
++
++ if (!ntp_synced() || independent_wallclock || !is_initial_xendomain())
++ return;
++
++ write_seqlock_irq(&xtime_lock);
++
++ sec = xtime.tv_sec;
++ nsec = xtime.tv_nsec + ((jiffies - wall_jiffies) * (u64)NS_PER_TICK);
++ __normalize_time(&sec, &nsec);
++
++ op.cmd = XENPF_settime;
++ op.u.settime.secs = sec;
++ op.u.settime.nsecs = nsec;
++ op.u.settime.system_time = processed_system_time;
++ WARN_ON(HYPERVISOR_platform_op(&op));
++
++ update_wallclock();
++
++ write_sequnlock_irq(&xtime_lock);
++
++ /* Once per minute. */
++ mod_timer(&sync_xen_wallclock_timer, jiffies + 60*HZ);
++}
++
++static int set_rtc_mmss(unsigned long nowtime)
++{
++ int retval;
++ unsigned long flags;
++
++ if (independent_wallclock || !is_initial_xendomain())
++ return 0;
++
++ /* gets recalled with irq locally disabled */
++ /* XXX - does irqsave resolve this? -johnstul */
++ spin_lock_irqsave(&rtc_lock, flags);
++ if (efi_enabled)
++ retval = efi_set_rtc_mmss(nowtime);
++ else
++ retval = mach_set_rtc_mmss(nowtime);
++ spin_unlock_irqrestore(&rtc_lock, flags);
++
++ return retval;
++}
++
++/* monotonic_clock(): returns # of nanoseconds passed since time_init()
++ * Note: This function is required to return accurate
++ * time even in the absence of multiple timer ticks.
++ */
++unsigned long long monotonic_clock(void)
++{
++ unsigned int cpu = get_cpu();
++ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
++ u64 time;
++ u32 local_time_version;
++
++ do {
++ local_time_version = shadow->version;
++ barrier();
++ time = shadow->system_timestamp + get_nsec_offset(shadow);
++ if (!time_values_up_to_date(cpu))
++ get_time_values_from_xen(cpu);
++ barrier();
++ } while (local_time_version != shadow->version);
++
++ put_cpu();
++
++ return time;
++}
++EXPORT_SYMBOL(monotonic_clock);
++
++#ifdef __x86_64__
++unsigned long long sched_clock(void)
++{
++ return monotonic_clock();
++}
++#endif
++
++#if defined(CONFIG_SMP) && defined(CONFIG_FRAME_POINTER)
++unsigned long profile_pc(struct pt_regs *regs)
++{
++ unsigned long pc = instruction_pointer(regs);
++
++#ifdef __x86_64__
++ /* Assume the lock function has either no stack frame or only a single word.
++ This checks if the address on the stack looks like a kernel text address.
++ There is a small window for false hits, but in that case the tick
++ is just accounted to the spinlock function.
++ Better would be to write these functions in assembler again
++ and check exactly. */
++ if (!user_mode_vm(regs) && in_lock_functions(pc)) {
++ char *v = *(char **)regs->rsp;
++ if ((v >= _stext && v <= _etext) ||
++ (v >= _sinittext && v <= _einittext) ||
++ (v >= (char *)MODULES_VADDR && v <= (char *)MODULES_END))
++ return (unsigned long)v;
++ return ((unsigned long *)regs->rsp)[1];
++ }
++#else
++ if (!user_mode_vm(regs) && in_lock_functions(pc))
++ return *(unsigned long *)(regs->ebp + 4);
++#endif
++
++ return pc;
++}
++EXPORT_SYMBOL(profile_pc);
++#endif
++
++/*
++ * This is the same as the above, except we _also_ save the current
++ * Time Stamp Counter value at the time of the timer interrupt, so that
++ * we later on can estimate the time of day more exactly.
++ */
++irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
++{
++ s64 delta, delta_cpu, stolen, blocked;
++ u64 sched_time;
++ unsigned int i, cpu = smp_processor_id();
++ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
++ struct vcpu_runstate_info *runstate = &per_cpu(runstate, cpu);
++
++ /*
++ * Here we are in the timer irq handler. We just have irqs locally
++ * disabled but we don't know if the timer_bh is running on the other
++ * CPU. We need to avoid to SMP race with it. NOTE: we don' t need
++ * the irq version of write_lock because as just said we have irq
++ * locally disabled. -arca
++ */
++ write_seqlock(&xtime_lock);
++
++ do {
++ get_time_values_from_xen(cpu);
++
++ /* Obtain a consistent snapshot of elapsed wallclock cycles. */
++ delta = delta_cpu =
++ shadow->system_timestamp + get_nsec_offset(shadow);
++ delta -= processed_system_time;
++ delta_cpu -= per_cpu(processed_system_time, cpu);
++
++ /*
++ * Obtain a consistent snapshot of stolen/blocked cycles. We
++ * can use state_entry_time to detect if we get preempted here.
++ */
++ do {
++ sched_time = runstate->state_entry_time;
++ barrier();
++ stolen = runstate->time[RUNSTATE_runnable] +
++ runstate->time[RUNSTATE_offline] -
++ per_cpu(processed_stolen_time, cpu);
++ blocked = runstate->time[RUNSTATE_blocked] -
++ per_cpu(processed_blocked_time, cpu);
++ barrier();
++ } while (sched_time != runstate->state_entry_time);
++ } while (!time_values_up_to_date(cpu));
++
++ if ((unlikely(delta < -(s64)permitted_clock_jitter) ||
++ unlikely(delta_cpu < -(s64)permitted_clock_jitter))
++ && printk_ratelimit()) {
++ printk("Timer ISR/%u: Time went backwards: "
++ "delta=%lld delta_cpu=%lld shadow=%lld "
++ "off=%lld processed=%lld cpu_processed=%lld\n",
++ cpu, delta, delta_cpu, shadow->system_timestamp,
++ (s64)get_nsec_offset(shadow),
++ processed_system_time,
++ per_cpu(processed_system_time, cpu));
++ for (i = 0; i < num_online_cpus(); i++)
++ printk(" %d: %lld\n", i,
++ per_cpu(processed_system_time, i));
++ }
++
++ /* System-wide jiffy work. */
++ while (delta >= NS_PER_TICK) {
++ delta -= NS_PER_TICK;
++ processed_system_time += NS_PER_TICK;
++ do_timer(regs);
++ }
++
++ if (shadow_tv_version != HYPERVISOR_shared_info->wc_version) {
++ update_wallclock();
++ if (keventd_up())
++ schedule_work(&clock_was_set_work);
++ }
++
++ write_sequnlock(&xtime_lock);
++
++ /*
++ * Account stolen ticks.
++ * HACK: Passing NULL to account_steal_time()
++ * ensures that the ticks are accounted as stolen.
++ */
++ if ((stolen > 0) && (delta_cpu > 0)) {
++ delta_cpu -= stolen;
++ if (unlikely(delta_cpu < 0))
++ stolen += delta_cpu; /* clamp local-time progress */
++ do_div(stolen, NS_PER_TICK);
++ per_cpu(processed_stolen_time, cpu) += stolen * NS_PER_TICK;
++ per_cpu(processed_system_time, cpu) += stolen * NS_PER_TICK;
++ account_steal_time(NULL, (cputime_t)stolen);
++ }
++
++ /*
++ * Account blocked ticks.
++ * HACK: Passing idle_task to account_steal_time()
++ * ensures that the ticks are accounted as idle/wait.
++ */
++ if ((blocked > 0) && (delta_cpu > 0)) {
++ delta_cpu -= blocked;
++ if (unlikely(delta_cpu < 0))
++ blocked += delta_cpu; /* clamp local-time progress */
++ do_div(blocked, NS_PER_TICK);
++ per_cpu(processed_blocked_time, cpu) += blocked * NS_PER_TICK;
++ per_cpu(processed_system_time, cpu) += blocked * NS_PER_TICK;
++ account_steal_time(idle_task(cpu), (cputime_t)blocked);
++ }
++
++ /* Account user/system ticks. */
++ if (delta_cpu > 0) {
++ do_div(delta_cpu, NS_PER_TICK);
++ per_cpu(processed_system_time, cpu) += delta_cpu * NS_PER_TICK;
++ if (user_mode_vm(regs))
++ account_user_time(current, (cputime_t)delta_cpu);
++ else
++ account_system_time(current, HARDIRQ_OFFSET,
++ (cputime_t)delta_cpu);
++ }
++
++ /* Offlined for more than a few seconds? Avoid lockup warnings. */
++ if (stolen > 5*HZ)
++ touch_softlockup_watchdog();
++
++ /* Local timer processing (see update_process_times()). */
++ run_local_timers();
++ if (rcu_pending(cpu))
++ rcu_check_callbacks(cpu, user_mode_vm(regs));
++ scheduler_tick();
++ run_posix_cpu_timers(current);
++ profile_tick(CPU_PROFILING, regs);
++
++ return IRQ_HANDLED;
++}
++
++static void init_missing_ticks_accounting(unsigned int cpu)
++{
++ struct vcpu_register_runstate_memory_area area;
++ struct vcpu_runstate_info *runstate = &per_cpu(runstate, cpu);
++ int rc;
++
++ memset(runstate, 0, sizeof(*runstate));
++
++ area.addr.v = runstate;
++ rc = HYPERVISOR_vcpu_op(VCPUOP_register_runstate_memory_area, cpu, &area);
++ WARN_ON(rc && rc != -ENOSYS);
++
++ per_cpu(processed_blocked_time, cpu) =
++ runstate->time[RUNSTATE_blocked];
++ per_cpu(processed_stolen_time, cpu) =
++ runstate->time[RUNSTATE_runnable] +
++ runstate->time[RUNSTATE_offline];
++}
++
++/* not static: needed by APM */
++unsigned long get_cmos_time(void)
++{
++ unsigned long retval;
++ unsigned long flags;
++
++ spin_lock_irqsave(&rtc_lock, flags);
++
++ if (efi_enabled)
++ retval = efi_get_time();
++ else
++ retval = mach_get_cmos_time();
++
++ spin_unlock_irqrestore(&rtc_lock, flags);
++
++ return retval;
++}
++EXPORT_SYMBOL(get_cmos_time);
++
++static void sync_cmos_clock(unsigned long dummy);
++
++static DEFINE_TIMER(sync_cmos_timer, sync_cmos_clock, 0, 0);
++
++static void sync_cmos_clock(unsigned long dummy)
++{
++ struct timeval now, next;
++ int fail = 1;
++
++ /*
++ * If we have an externally synchronized Linux clock, then update
++ * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
++ * called as close as possible to 500 ms before the new second starts.
++ * This code is run on a timer. If the clock is set, that timer
++ * may not expire at the correct time. Thus, we adjust...
++ */
++ if (!ntp_synced())
++ /*
++ * Not synced, exit, do not restart a timer (if one is
++ * running, let it run out).
++ */
++ return;
++
++ do_gettimeofday(&now);
++ if (now.tv_usec >= USEC_AFTER - ((unsigned) TICK_SIZE) / 2 &&
++ now.tv_usec <= USEC_BEFORE + ((unsigned) TICK_SIZE) / 2)
++ fail = set_rtc_mmss(now.tv_sec);
++
++ next.tv_usec = USEC_AFTER - now.tv_usec;
++ if (next.tv_usec <= 0)
++ next.tv_usec += USEC_PER_SEC;
++
++ if (!fail)
++ next.tv_sec = 659;
++ else
++ next.tv_sec = 0;
++
++ if (next.tv_usec >= USEC_PER_SEC) {
++ next.tv_sec++;
++ next.tv_usec -= USEC_PER_SEC;
++ }
++ mod_timer(&sync_cmos_timer, jiffies + timeval_to_jiffies(&next));
++}
++
++void notify_arch_cmos_timer(void)
++{
++ mod_timer(&sync_cmos_timer, jiffies + 1);
++ mod_timer(&sync_xen_wallclock_timer, jiffies + 1);
++}
++
++static int timer_resume(struct sys_device *dev)
++{
++ extern void time_resume(void);
++ time_resume();
++ return 0;
++}
++
++static struct sysdev_class timer_sysclass = {
++ .resume = timer_resume,
++ set_kset_name("timer"),
++};
++
++
++/* XXX this driverfs stuff should probably go elsewhere later -john */
++static struct sys_device device_timer = {
++ .id = 0,
++ .cls = &timer_sysclass,
++};
++
++static int time_init_device(void)
++{
++ int error = sysdev_class_register(&timer_sysclass);
++ if (!error)
++ error = sysdev_register(&device_timer);
++ return error;
++}
++
++device_initcall(time_init_device);
++
++#ifdef CONFIG_HPET_TIMER
++extern void (*late_time_init)(void);
++/* Duplicate of time_init() below, with hpet_enable part added */
++static void __init hpet_time_init(void)
++{
++ xtime.tv_sec = get_cmos_time();
++ xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
++ set_normalized_timespec(&wall_to_monotonic,
++ -xtime.tv_sec, -xtime.tv_nsec);
++
++ if ((hpet_enable() >= 0) && hpet_use_timer) {
++ printk("Using HPET for base-timer\n");
++ }
++
++ time_init_hook();
++}
++#endif
++
++/* Dynamically-mapped IRQ. */
++DEFINE_PER_CPU(int, timer_irq);
++
++extern void (*late_time_init)(void);
++static void setup_cpu0_timer_irq(void)
++{
++ per_cpu(timer_irq, 0) =
++ bind_virq_to_irqhandler(
++ VIRQ_TIMER,
++ 0,
++ timer_interrupt,
++ SA_INTERRUPT,
++ "timer0",
++ NULL);
++ BUG_ON(per_cpu(timer_irq, 0) < 0);
++}
++
++static struct vcpu_set_periodic_timer xen_set_periodic_tick = {
++ .period_ns = NS_PER_TICK
++};
++
++void __init time_init(void)
++{
++#ifdef CONFIG_HPET_TIMER
++ if (is_hpet_capable()) {
++ /*
++ * HPET initialization needs to do memory-mapped io. So, let
++ * us do a late initialization after mem_init().
++ */
++ late_time_init = hpet_time_init;
++ return;
++ }
++#endif
++
++ switch (HYPERVISOR_vcpu_op(VCPUOP_set_periodic_timer, 0,
++ &xen_set_periodic_tick)) {
++ case 0:
++#if CONFIG_XEN_COMPAT <= 0x030004
++ case -ENOSYS:
++#endif
++ break;
++ default:
++ BUG();
++ }
++
++ get_time_values_from_xen(0);
++
++ processed_system_time = per_cpu(shadow_time, 0).system_timestamp;
++ per_cpu(processed_system_time, 0) = processed_system_time;
++ init_missing_ticks_accounting(0);
++
++ update_wallclock();
++
++ init_cpu_khz();
++ printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
++ cpu_khz / 1000, cpu_khz % 1000);
++
++#if defined(__x86_64__)
++ vxtime.mode = VXTIME_TSC;
++ vxtime.quot = (1000000L << 32) / vxtime_hz;
++ vxtime.tsc_quot = (1000L << 32) / cpu_khz;
++ sync_core();
++ rdtscll(vxtime.last_tsc);
++#endif
++
++ /* Cannot request_irq() until kmem is initialised. */
++ late_time_init = setup_cpu0_timer_irq;
++}
++
++/* Convert jiffies to system time. */
++u64 jiffies_to_st(unsigned long j)
++{
++ unsigned long seq;
++ long delta;
++ u64 st;
++
++ do {
++ seq = read_seqbegin(&xtime_lock);
++ delta = j - jiffies;
++ if (delta < 1) {
++ /* Triggers in some wrap-around cases, but that's okay:
++ * we just end up with a shorter timeout. */
++ st = processed_system_time + NS_PER_TICK;
++ } else if (((unsigned long)delta >> (BITS_PER_LONG-3)) != 0) {
++ /* Very long timeout means there is no pending timer.
++ * We indicate this to Xen by passing zero timeout. */
++ st = 0;
++ } else {
++ st = processed_system_time + delta * (u64)NS_PER_TICK;
++ }
++ } while (read_seqretry(&xtime_lock, seq));
++
++ return st;
++}
++EXPORT_SYMBOL(jiffies_to_st);
++
++/*
++ * stop_hz_timer / start_hz_timer - enter/exit 'tickless mode' on an idle cpu
++ * These functions are based on implementations from arch/s390/kernel/time.c
++ */
++static void stop_hz_timer(void)
++{
++ struct vcpu_set_singleshot_timer singleshot;
++ unsigned int cpu = smp_processor_id();
++ unsigned long j;
++ int rc;
++
++ cpu_set(cpu, nohz_cpu_mask);
++
++ /* See matching smp_mb in rcu_start_batch in rcupdate.c. These mbs */
++ /* ensure that if __rcu_pending (nested in rcu_needs_cpu) fetches a */
++ /* value of rcp->cur that matches rdp->quiescbatch and allows us to */
++ /* stop the hz timer then the cpumasks created for subsequent values */
++ /* of cur in rcu_start_batch are guaranteed to pick up the updated */
++ /* nohz_cpu_mask and so will not depend on this cpu. */
++
++ smp_mb();
++
++ /* Leave ourselves in tick mode if rcu or softirq or timer pending. */
++ if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
++ (j = next_timer_interrupt(), time_before_eq(j, jiffies))) {
++ cpu_clear(cpu, nohz_cpu_mask);
++ j = jiffies + 1;
++ }
++
++ singleshot.timeout_abs_ns = jiffies_to_st(j) + NS_PER_TICK/2;
++ singleshot.flags = 0;
++ rc = HYPERVISOR_vcpu_op(VCPUOP_set_singleshot_timer, cpu, &singleshot);
++#if CONFIG_XEN_COMPAT <= 0x030004
++ if (rc) {
++ BUG_ON(rc != -ENOSYS);
++ rc = HYPERVISOR_set_timer_op(singleshot.timeout_abs_ns);
++ }
++#endif
++ BUG_ON(rc);
++}
++
++static void start_hz_timer(void)
++{
++ cpu_clear(smp_processor_id(), nohz_cpu_mask);
++}
++
++void raw_safe_halt(void)
++{
++ stop_hz_timer();
++ /* Blocking includes an implicit local_irq_enable(). */
++ HYPERVISOR_block();
++ start_hz_timer();
++}
++EXPORT_SYMBOL(raw_safe_halt);
++
++void halt(void)
++{
++ if (irqs_disabled())
++ VOID(HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL));
++}
++EXPORT_SYMBOL(halt);
++
++/* No locking required. Interrupts are disabled on all CPUs. */
++void time_resume(void)
++{
++ unsigned int cpu;
++
++ init_cpu_khz();
++
++ for_each_online_cpu(cpu) {
++ switch (HYPERVISOR_vcpu_op(VCPUOP_set_periodic_timer, cpu,
++ &xen_set_periodic_tick)) {
++ case 0:
++#if CONFIG_XEN_COMPAT <= 0x030004
++ case -ENOSYS:
++#endif
++ break;
++ default:
++ BUG();
++ }
++ get_time_values_from_xen(cpu);
++ per_cpu(processed_system_time, cpu) =
++ per_cpu(shadow_time, 0).system_timestamp;
++ init_missing_ticks_accounting(cpu);
++ }
++
++ processed_system_time = per_cpu(shadow_time, 0).system_timestamp;
++
++ update_wallclock();
++}
++
++#ifdef CONFIG_SMP
++static char timer_name[NR_CPUS][15];
++
++int __cpuinit local_setup_timer(unsigned int cpu)
++{
++ int seq, irq;
++
++ BUG_ON(cpu == 0);
++
++ switch (HYPERVISOR_vcpu_op(VCPUOP_set_periodic_timer, cpu,
++ &xen_set_periodic_tick)) {
++ case 0:
++#if CONFIG_XEN_COMPAT <= 0x030004
++ case -ENOSYS:
++#endif
++ break;
++ default:
++ BUG();
++ }
++
++ do {
++ seq = read_seqbegin(&xtime_lock);
++ /* Use cpu0 timestamp: cpu's shadow is not initialised yet. */
++ per_cpu(processed_system_time, cpu) =
++ per_cpu(shadow_time, 0).system_timestamp;
++ init_missing_ticks_accounting(cpu);
++ } while (read_seqretry(&xtime_lock, seq));
++
++ sprintf(timer_name[cpu], "timer%u", cpu);
++ irq = bind_virq_to_irqhandler(VIRQ_TIMER,
++ cpu,
++ timer_interrupt,
++ SA_INTERRUPT,
++ timer_name[cpu],
++ NULL);
++ if (irq < 0)
++ return irq;
++ per_cpu(timer_irq, cpu) = irq;
++
++ return 0;
++}
++
++void __cpuexit local_teardown_timer(unsigned int cpu)
++{
++ BUG_ON(cpu == 0);
++ unbind_from_irqhandler(per_cpu(timer_irq, cpu), NULL);
++}
++#endif
++
++#ifdef CONFIG_CPU_FREQ
++static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
++ void *data)
++{
++ struct cpufreq_freqs *freq = data;
++ struct xen_platform_op op;
++
++ if (cpu_has(&cpu_data[freq->cpu], X86_FEATURE_CONSTANT_TSC))
++ return 0;
++
++ if (val == CPUFREQ_PRECHANGE)
++ return 0;
++
++ op.cmd = XENPF_change_freq;
++ op.u.change_freq.flags = 0;
++ op.u.change_freq.cpu = freq->cpu;
++ op.u.change_freq.freq = (u64)freq->new * 1000;
++ WARN_ON(HYPERVISOR_platform_op(&op));
++
++ return 0;
++}
++
++static struct notifier_block time_cpufreq_notifier_block = {
++ .notifier_call = time_cpufreq_notifier
++};
++
++static int __init cpufreq_time_setup(void)
++{
++ if (!cpufreq_register_notifier(&time_cpufreq_notifier_block,
++ CPUFREQ_TRANSITION_NOTIFIER)) {
++ printk(KERN_ERR "failed to set up cpufreq notifier\n");
++ return -ENODEV;
++ }
++ return 0;
++}
++
++core_initcall(cpufreq_time_setup);
++#endif
++
++/*
++ * /proc/sys/xen: This really belongs in another file. It can stay here for
++ * now however.
++ */
++static ctl_table xen_subtable[] = {
++ {
++ .ctl_name = 1,
++ .procname = "independent_wallclock",
++ .data = &independent_wallclock,
++ .maxlen = sizeof(independent_wallclock),
++ .mode = 0644,
++ .proc_handler = proc_dointvec
++ },
++ {
++ .ctl_name = 2,
++ .procname = "permitted_clock_jitter",
++ .data = &permitted_clock_jitter,
++ .maxlen = sizeof(permitted_clock_jitter),
++ .mode = 0644,
++ .proc_handler = proc_doulongvec_minmax
++ },
++ { 0 }
++};
++static ctl_table xen_table[] = {
++ {
++ .ctl_name = 123,
++ .procname = "xen",
++ .mode = 0555,
++ .child = xen_subtable},
++ { 0 }
++};
++static int __init xen_sysctl_init(void)
++{
++ (void)register_sysctl_table(xen_table, 0);
++ return 0;
++}
++__initcall(xen_sysctl_init);
+Index: head-2008-11-25/arch/x86/kernel/traps_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/traps_32-xen.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,1190 @@
++/*
++ * linux/arch/i386/traps.c
++ *
++ * Copyright (C) 1991, 1992 Linus Torvalds
++ *
++ * Pentium III FXSR, SSE support
++ * Gareth Hughes <gareth@valinux.com>, May 2000
++ */
++
++/*
++ * 'Traps.c' handles hardware traps and faults after we have saved some
++ * state in 'asm.s'.
++ */
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/string.h>
++#include <linux/errno.h>
++#include <linux/timer.h>
++#include <linux/mm.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/spinlock.h>
++#include <linux/interrupt.h>
++#include <linux/highmem.h>
++#include <linux/kallsyms.h>
++#include <linux/ptrace.h>
++#include <linux/utsname.h>
++#include <linux/kprobes.h>
++#include <linux/kexec.h>
++#include <linux/unwind.h>
++
++#ifdef CONFIG_EISA
++#include <linux/ioport.h>
++#include <linux/eisa.h>
++#endif
++
++#ifdef CONFIG_MCA
++#include <linux/mca.h>
++#endif
++
++#include <asm/processor.h>
++#include <asm/system.h>
++#include <asm/uaccess.h>
++#include <asm/io.h>
++#include <asm/atomic.h>
++#include <asm/debugreg.h>
++#include <asm/desc.h>
++#include <asm/i387.h>
++#include <asm/nmi.h>
++#include <asm/unwind.h>
++#include <asm/smp.h>
++#include <asm/arch_hooks.h>
++#include <asm/kdebug.h>
++
++#include <linux/module.h>
++
++#include "mach_traps.h"
++
++asmlinkage int system_call(void);
++
++struct desc_struct default_ldt[] = { { 0, 0 }, { 0, 0 }, { 0, 0 },
++ { 0, 0 }, { 0, 0 } };
++
++/* Do we ignore FPU interrupts ? */
++char ignore_fpu_irq = 0;
++
++#ifndef CONFIG_X86_NO_IDT
++/*
++ * The IDT has to be page-aligned to simplify the Pentium
++ * F0 0F bug workaround.. We have a special link segment
++ * for this.
++ */
++struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
++#endif
++
++asmlinkage void divide_error(void);
++asmlinkage void debug(void);
++asmlinkage void nmi(void);
++asmlinkage void int3(void);
++asmlinkage void overflow(void);
++asmlinkage void bounds(void);
++asmlinkage void invalid_op(void);
++asmlinkage void device_not_available(void);
++asmlinkage void coprocessor_segment_overrun(void);
++asmlinkage void invalid_TSS(void);
++asmlinkage void segment_not_present(void);
++asmlinkage void stack_segment(void);
++asmlinkage void general_protection(void);
++asmlinkage void page_fault(void);
++asmlinkage void coprocessor_error(void);
++asmlinkage void simd_coprocessor_error(void);
++asmlinkage void alignment_check(void);
++#ifndef CONFIG_XEN
++asmlinkage void spurious_interrupt_bug(void);
++#else
++asmlinkage void fixup_4gb_segment(void);
++#endif
++asmlinkage void machine_check(void);
++
++static int kstack_depth_to_print = 24;
++#ifdef CONFIG_STACK_UNWIND
++static int call_trace = 1;
++#else
++#define call_trace (-1)
++#endif
++ATOMIC_NOTIFIER_HEAD(i386die_chain);
++
++int register_die_notifier(struct notifier_block *nb)
++{
++ vmalloc_sync_all();
++ return atomic_notifier_chain_register(&i386die_chain, nb);
++}
++EXPORT_SYMBOL(register_die_notifier); /* used modular by kdb */
++
++int unregister_die_notifier(struct notifier_block *nb)
++{
++ return atomic_notifier_chain_unregister(&i386die_chain, nb);
++}
++EXPORT_SYMBOL(unregister_die_notifier); /* used modular by kdb */
++
++static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
++{
++ return p > (void *)tinfo &&
++ p < (void *)tinfo + THREAD_SIZE - 3;
++}
++
++/*
++ * Print one address/symbol entries per line.
++ */
++static inline void print_addr_and_symbol(unsigned long addr, char *log_lvl)
++{
++ printk(" [<%08lx>] ", addr);
++
++ print_symbol("%s\n", addr);
++}
++
++static inline unsigned long print_context_stack(struct thread_info *tinfo,
++ unsigned long *stack, unsigned long ebp,
++ char *log_lvl)
++{
++ unsigned long addr;
++
++#ifdef CONFIG_FRAME_POINTER
++ while (valid_stack_ptr(tinfo, (void *)ebp)) {
++ addr = *(unsigned long *)(ebp + 4);
++ print_addr_and_symbol(addr, log_lvl);
++ /*
++ * break out of recursive entries (such as
++ * end_of_stack_stop_unwind_function):
++ */
++ if (ebp == *(unsigned long *)ebp)
++ break;
++ ebp = *(unsigned long *)ebp;
++ }
++#else
++ while (valid_stack_ptr(tinfo, stack)) {
++ addr = *stack++;
++ if (__kernel_text_address(addr))
++ print_addr_and_symbol(addr, log_lvl);
++ }
++#endif
++ return ebp;
++}
++
++static asmlinkage int
++show_trace_unwind(struct unwind_frame_info *info, void *log_lvl)
++{
++ int n = 0;
++
++ while (unwind(info) == 0 && UNW_PC(info)) {
++ n++;
++ print_addr_and_symbol(UNW_PC(info), log_lvl);
++ if (arch_unw_user_mode(info))
++ break;
++ }
++ return n;
++}
++
++static void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
++ unsigned long *stack, char *log_lvl)
++{
++ unsigned long ebp;
++
++ if (!task)
++ task = current;
++
++ if (call_trace >= 0) {
++ int unw_ret = 0;
++ struct unwind_frame_info info;
++
++ if (regs) {
++ if (unwind_init_frame_info(&info, task, regs) == 0)
++ unw_ret = show_trace_unwind(&info, log_lvl);
++ } else if (task == current)
++ unw_ret = unwind_init_running(&info, show_trace_unwind, log_lvl);
++ else {
++ if (unwind_init_blocked(&info, task) == 0)
++ unw_ret = show_trace_unwind(&info, log_lvl);
++ }
++ if (unw_ret > 0) {
++ if (call_trace == 1 && !arch_unw_user_mode(&info)) {
++ print_symbol("DWARF2 unwinder stuck at %s\n",
++ UNW_PC(&info));
++ if (UNW_SP(&info) >= PAGE_OFFSET) {
++ printk("Leftover inexact backtrace:\n");
++ stack = (void *)UNW_SP(&info);
++ } else
++ printk("Full inexact backtrace again:\n");
++ } else if (call_trace >= 1)
++ return;
++ else
++ printk("Full inexact backtrace again:\n");
++ } else
++ printk("Inexact backtrace:\n");
++ }
++
++ if (task == current) {
++ /* Grab ebp right from our regs */
++ asm ("movl %%ebp, %0" : "=r" (ebp) : );
++ } else {
++ /* ebp is the last reg pushed by switch_to */
++ ebp = *(unsigned long *) task->thread.esp;
++ }
++
++ while (1) {
++ struct thread_info *context;
++ context = (struct thread_info *)
++ ((unsigned long)stack & (~(THREAD_SIZE - 1)));
++ ebp = print_context_stack(context, stack, ebp, log_lvl);
++ stack = (unsigned long*)context->previous_esp;
++ if (!stack)
++ break;
++ printk("%s =======================\n", log_lvl);
++ }
++}
++
++void show_trace(struct task_struct *task, struct pt_regs *regs, unsigned long * stack)
++{
++ show_trace_log_lvl(task, regs, stack, "");
++}
++
++static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
++ unsigned long *esp, char *log_lvl)
++{
++ unsigned long *stack;
++ int i;
++
++ if (esp == NULL) {
++ if (task)
++ esp = (unsigned long*)task->thread.esp;
++ else
++ esp = (unsigned long *)&esp;
++ }
++
++ stack = esp;
++ for(i = 0; i < kstack_depth_to_print; i++) {
++ if (kstack_end(stack))
++ break;
++ if (i && ((i % 8) == 0))
++ printk("\n%s ", log_lvl);
++ printk("%08lx ", *stack++);
++ }
++ printk("\n%sCall Trace:\n", log_lvl);
++ show_trace_log_lvl(task, regs, esp, log_lvl);
++}
++
++void show_stack(struct task_struct *task, unsigned long *esp)
++{
++ printk(" ");
++ show_stack_log_lvl(task, NULL, esp, "");
++}
++
++/*
++ * The architecture-independent dump_stack generator
++ */
++void dump_stack(void)
++{
++ unsigned long stack;
++
++ show_trace(current, NULL, &stack);
++}
++
++EXPORT_SYMBOL(dump_stack);
++
++void show_registers(struct pt_regs *regs)
++{
++ int i;
++ int in_kernel = 1;
++ unsigned long esp;
++ unsigned short ss;
++
++ esp = (unsigned long) (®s->esp);
++ savesegment(ss, ss);
++ if (user_mode_vm(regs)) {
++ in_kernel = 0;
++ esp = regs->esp;
++ ss = regs->xss & 0xffff;
++ }
++ print_modules();
++ printk(KERN_EMERG "CPU: %d\nEIP: %04x:[<%08lx>] %s VLI\n"
++ "EFLAGS: %08lx (%s %.*s) \n",
++ smp_processor_id(), 0xffff & regs->xcs, regs->eip,
++ print_tainted(), regs->eflags, system_utsname.release,
++ (int)strcspn(system_utsname.version, " "),
++ system_utsname.version);
++ print_symbol(KERN_EMERG "EIP is at %s\n", regs->eip);
++ printk(KERN_EMERG "eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
++ regs->eax, regs->ebx, regs->ecx, regs->edx);
++ printk(KERN_EMERG "esi: %08lx edi: %08lx ebp: %08lx esp: %08lx\n",
++ regs->esi, regs->edi, regs->ebp, esp);
++ printk(KERN_EMERG "ds: %04x es: %04x ss: %04x\n",
++ regs->xds & 0xffff, regs->xes & 0xffff, ss);
++ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
++ TASK_COMM_LEN, current->comm, current->pid,
++ current_thread_info(), current, current->thread_info);
++ /*
++ * When in-kernel, we also print out the stack and code at the
++ * time of the fault..
++ */
++ if (in_kernel) {
++ u8 __user *eip;
++
++ printk("\n" KERN_EMERG "Stack: ");
++ show_stack_log_lvl(NULL, regs, (unsigned long *)esp, KERN_EMERG);
++
++ printk(KERN_EMERG "Code: ");
++
++ eip = (u8 __user *)regs->eip - 43;
++ for (i = 0; i < 64; i++, eip++) {
++ unsigned char c;
++
++ if (eip < (u8 __user *)PAGE_OFFSET || __get_user(c, eip)) {
++ printk(" Bad EIP value.");
++ break;
++ }
++ if (eip == (u8 __user *)regs->eip)
++ printk("<%02x> ", c);
++ else
++ printk("%02x ", c);
++ }
++ }
++ printk("\n");
++}
++
++static void handle_BUG(struct pt_regs *regs)
++{
++ unsigned long eip = regs->eip;
++ unsigned short ud2;
++
++ if (eip < PAGE_OFFSET)
++ return;
++ if (__get_user(ud2, (unsigned short __user *)eip))
++ return;
++ if (ud2 != 0x0b0f)
++ return;
++
++ printk(KERN_EMERG "------------[ cut here ]------------\n");
++
++#ifdef CONFIG_DEBUG_BUGVERBOSE
++ do {
++ unsigned short line;
++ char *file;
++ char c;
++
++ if (__get_user(line, (unsigned short __user *)(eip + 2)))
++ break;
++ if (__get_user(file, (char * __user *)(eip + 4)) ||
++ (unsigned long)file < PAGE_OFFSET || __get_user(c, file))
++ file = "<bad filename>";
++
++ printk(KERN_EMERG "kernel BUG at %s:%d!\n", file, line);
++ return;
++ } while (0);
++#endif
++ printk(KERN_EMERG "Kernel BUG at [verbose debug info unavailable]\n");
++}
++
++/* This is gone through when something in the kernel
++ * has done something bad and is about to be terminated.
++*/
++void die(const char * str, struct pt_regs * regs, long err)
++{
++ static struct {
++ spinlock_t lock;
++ u32 lock_owner;
++ int lock_owner_depth;
++ } die = {
++ .lock = SPIN_LOCK_UNLOCKED,
++ .lock_owner = -1,
++ .lock_owner_depth = 0
++ };
++ static int die_counter;
++ unsigned long flags;
++
++ oops_enter();
++
++ if (die.lock_owner != raw_smp_processor_id()) {
++ console_verbose();
++ spin_lock_irqsave(&die.lock, flags);
++ die.lock_owner = smp_processor_id();
++ die.lock_owner_depth = 0;
++ bust_spinlocks(1);
++ }
++ else
++ local_save_flags(flags);
++
++ if (++die.lock_owner_depth < 3) {
++ int nl = 0;
++ unsigned long esp;
++ unsigned short ss;
++
++ handle_BUG(regs);
++ printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
++#ifdef CONFIG_PREEMPT
++ printk(KERN_EMERG "PREEMPT ");
++ nl = 1;
++#endif
++#ifdef CONFIG_SMP
++ if (!nl)
++ printk(KERN_EMERG);
++ printk("SMP ");
++ nl = 1;
++#endif
++#ifdef CONFIG_DEBUG_PAGEALLOC
++ if (!nl)
++ printk(KERN_EMERG);
++ printk("DEBUG_PAGEALLOC");
++ nl = 1;
++#endif
++ if (nl)
++ printk("\n");
++ if (notify_die(DIE_OOPS, str, regs, err,
++ current->thread.trap_no, SIGSEGV) !=
++ NOTIFY_STOP) {
++ show_registers(regs);
++ /* Executive summary in case the oops scrolled away */
++ esp = (unsigned long) (®s->esp);
++ savesegment(ss, ss);
++ if (user_mode(regs)) {
++ esp = regs->esp;
++ ss = regs->xss & 0xffff;
++ }
++ printk(KERN_EMERG "EIP: [<%08lx>] ", regs->eip);
++ print_symbol("%s", regs->eip);
++ printk(" SS:ESP %04x:%08lx\n", ss, esp);
++ }
++ else
++ regs = NULL;
++ } else
++ printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
++
++ bust_spinlocks(0);
++ die.lock_owner = -1;
++ spin_unlock_irqrestore(&die.lock, flags);
++
++ if (!regs)
++ return;
++
++ if (kexec_should_crash(current))
++ crash_kexec(regs);
++
++ if (in_interrupt())
++ panic("Fatal exception in interrupt");
++
++ if (panic_on_oops)
++ panic("Fatal exception");
++
++ oops_exit();
++ do_exit(SIGSEGV);
++}
++
++static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err)
++{
++ if (!user_mode_vm(regs))
++ die(str, regs, err);
++}
++
++static void __kprobes do_trap(int trapnr, int signr, char *str, int vm86,
++ struct pt_regs * regs, long error_code,
++ siginfo_t *info)
++{
++ struct task_struct *tsk = current;
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
++
++ if (regs->eflags & VM_MASK) {
++ if (vm86)
++ goto vm86_trap;
++ goto trap_signal;
++ }
++
++ if (!user_mode(regs))
++ goto kernel_trap;
++
++ trap_signal: {
++ if (info)
++ force_sig_info(signr, info, tsk);
++ else
++ force_sig(signr, tsk);
++ return;
++ }
++
++ kernel_trap: {
++ if (!fixup_exception(regs))
++ die(str, regs, error_code);
++ return;
++ }
++
++ vm86_trap: {
++ int ret = handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, trapnr);
++ if (ret) goto trap_signal;
++ return;
++ }
++}
++
++#define DO_ERROR(trapnr, signr, str, name) \
++fastcall void do_##name(struct pt_regs * regs, long error_code) \
++{ \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
++}
++
++#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
++fastcall void do_##name(struct pt_regs * regs, long error_code) \
++{ \
++ siginfo_t info; \
++ info.si_signo = signr; \
++ info.si_errno = 0; \
++ info.si_code = sicode; \
++ info.si_addr = (void __user *)siaddr; \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
++}
++
++#define DO_VM86_ERROR(trapnr, signr, str, name) \
++fastcall void do_##name(struct pt_regs * regs, long error_code) \
++{ \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
++}
++
++#define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
++fastcall void do_##name(struct pt_regs * regs, long error_code) \
++{ \
++ siginfo_t info; \
++ info.si_signo = signr; \
++ info.si_errno = 0; \
++ info.si_code = sicode; \
++ info.si_addr = (void __user *)siaddr; \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
++}
++
++DO_VM86_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->eip)
++#ifndef CONFIG_KPROBES
++DO_VM86_ERROR( 3, SIGTRAP, "int3", int3)
++#endif
++DO_VM86_ERROR( 4, SIGSEGV, "overflow", overflow)
++DO_VM86_ERROR( 5, SIGSEGV, "bounds", bounds)
++DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip)
++DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
++DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
++DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
++DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
++DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
++DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0)
++
++fastcall void __kprobes do_general_protection(struct pt_regs * regs,
++ long error_code)
++{
++ current->thread.error_code = error_code;
++ current->thread.trap_no = 13;
++
++ if (regs->eflags & VM_MASK)
++ goto gp_in_vm86;
++
++ if (!user_mode(regs))
++ goto gp_in_kernel;
++
++ current->thread.error_code = error_code;
++ current->thread.trap_no = 13;
++ force_sig(SIGSEGV, current);
++ return;
++
++gp_in_vm86:
++ local_irq_enable();
++ handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
++ return;
++
++gp_in_kernel:
++ if (!fixup_exception(regs)) {
++ if (notify_die(DIE_GPF, "general protection fault", regs,
++ error_code, 13, SIGSEGV) == NOTIFY_STOP)
++ return;
++ die("general protection fault", regs, error_code);
++ }
++}
++
++static void mem_parity_error(unsigned char reason, struct pt_regs * regs)
++{
++ printk(KERN_EMERG "Uhhuh. NMI received. Dazed and confused, but trying "
++ "to continue\n");
++ printk(KERN_EMERG "You probably have a hardware problem with your RAM "
++ "chips\n");
++
++ /* Clear and disable the memory parity error line. */
++ clear_mem_error(reason);
++}
++
++static void io_check_error(unsigned char reason, struct pt_regs * regs)
++{
++ printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
++ show_registers(regs);
++
++ /* Re-enable the IOCK line, wait for a few seconds */
++ clear_io_check_error(reason);
++}
++
++static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
++{
++#ifdef CONFIG_MCA
++ /* Might actually be able to figure out what the guilty party
++ * is. */
++ if( MCA_bus ) {
++ mca_handle_nmi();
++ return;
++ }
++#endif
++ printk("Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
++ reason, smp_processor_id());
++ printk("Dazed and confused, but trying to continue\n");
++ printk("Do you have a strange power saving mode enabled?\n");
++}
++
++static DEFINE_SPINLOCK(nmi_print_lock);
++
++void die_nmi (struct pt_regs *regs, const char *msg)
++{
++ if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 2, SIGINT) ==
++ NOTIFY_STOP)
++ return;
++
++ spin_lock(&nmi_print_lock);
++ /*
++ * We are in trouble anyway, lets at least try
++ * to get a message out.
++ */
++ bust_spinlocks(1);
++ printk(KERN_EMERG "%s", msg);
++ printk(" on CPU%d, eip %08lx, registers:\n",
++ smp_processor_id(), regs->eip);
++ show_registers(regs);
++ printk(KERN_EMERG "console shuts up ...\n");
++ console_silent();
++ spin_unlock(&nmi_print_lock);
++ bust_spinlocks(0);
++
++ /* If we are in kernel we are probably nested up pretty bad
++ * and might aswell get out now while we still can.
++ */
++ if (!user_mode_vm(regs)) {
++ current->thread.trap_no = 2;
++ crash_kexec(regs);
++ }
++
++ do_exit(SIGSEGV);
++}
++
++static void default_do_nmi(struct pt_regs * regs)
++{
++ unsigned char reason = 0;
++
++ /* Only the BSP gets external NMIs from the system. */
++ if (!smp_processor_id())
++ reason = get_nmi_reason();
++
++ if (!(reason & 0xc0)) {
++ if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
++ == NOTIFY_STOP)
++ return;
++#ifdef CONFIG_X86_LOCAL_APIC
++ /*
++ * Ok, so this is none of the documented NMI sources,
++ * so it must be the NMI watchdog.
++ */
++ if (nmi_watchdog) {
++ nmi_watchdog_tick(regs);
++ return;
++ }
++#endif
++ unknown_nmi_error(reason, regs);
++ return;
++ }
++ if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
++ return;
++ if (reason & 0x80)
++ mem_parity_error(reason, regs);
++ if (reason & 0x40)
++ io_check_error(reason, regs);
++ /*
++ * Reassert NMI in case it became active meanwhile
++ * as it's edge-triggered.
++ */
++ reassert_nmi();
++}
++
++static int dummy_nmi_callback(struct pt_regs * regs, int cpu)
++{
++ return 0;
++}
++
++static nmi_callback_t nmi_callback = dummy_nmi_callback;
++
++fastcall void do_nmi(struct pt_regs * regs, long error_code)
++{
++ int cpu;
++
++ nmi_enter();
++
++ cpu = smp_processor_id();
++
++ ++nmi_count(cpu);
++
++ if (!rcu_dereference(nmi_callback)(regs, cpu))
++ default_do_nmi(regs);
++
++ nmi_exit();
++}
++
++void set_nmi_callback(nmi_callback_t callback)
++{
++ vmalloc_sync_all();
++ rcu_assign_pointer(nmi_callback, callback);
++}
++EXPORT_SYMBOL_GPL(set_nmi_callback);
++
++void unset_nmi_callback(void)
++{
++ nmi_callback = dummy_nmi_callback;
++}
++EXPORT_SYMBOL_GPL(unset_nmi_callback);
++
++#ifdef CONFIG_KPROBES
++fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
++{
++ if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
++ == NOTIFY_STOP)
++ return;
++ /* This is an interrupt gate, because kprobes wants interrupts
++ disabled. Normal trap handlers don't. */
++ restore_interrupts(regs);
++ do_trap(3, SIGTRAP, "int3", 1, regs, error_code, NULL);
++}
++#endif
++
++/*
++ * Our handling of the processor debug registers is non-trivial.
++ * We do not clear them on entry and exit from the kernel. Therefore
++ * it is possible to get a watchpoint trap here from inside the kernel.
++ * However, the code in ./ptrace.c has ensured that the user can
++ * only set watchpoints on userspace addresses. Therefore the in-kernel
++ * watchpoint trap can only occur in code which is reading/writing
++ * from user space. Such code must not hold kernel locks (since it
++ * can equally take a page fault), therefore it is safe to call
++ * force_sig_info even though that claims and releases locks.
++ *
++ * Code in ./signal.c ensures that the debug control register
++ * is restored before we deliver any signal, and therefore that
++ * user code runs with the correct debug control register even though
++ * we clear it here.
++ *
++ * Being careful here means that we don't have to be as careful in a
++ * lot of more complicated places (task switching can be a bit lazy
++ * about restoring all the debug state, and ptrace doesn't have to
++ * find every occurrence of the TF bit that could be saved away even
++ * by user code)
++ */
++fastcall void __kprobes do_debug(struct pt_regs * regs, long error_code)
++{
++ unsigned int condition;
++ struct task_struct *tsk = current;
++
++ get_debugreg(condition, 6);
++
++ if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
++ SIGTRAP) == NOTIFY_STOP)
++ return;
++ /* It's safe to allow irq's after DR6 has been saved */
++ if (regs->eflags & X86_EFLAGS_IF)
++ local_irq_enable();
++
++ /* Mask out spurious debug traps due to lazy DR7 setting */
++ if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
++ if (!tsk->thread.debugreg[7])
++ goto clear_dr7;
++ }
++
++ if (regs->eflags & VM_MASK)
++ goto debug_vm86;
++
++ /* Save debug status register where ptrace can see it */
++ tsk->thread.debugreg[6] = condition;
++
++ /*
++ * Single-stepping through TF: make sure we ignore any events in
++ * kernel space (but re-enable TF when returning to user mode).
++ */
++ if (condition & DR_STEP) {
++ /*
++ * We already checked v86 mode above, so we can
++ * check for kernel mode by just checking the CPL
++ * of CS.
++ */
++ if (!user_mode(regs))
++ goto clear_TF_reenable;
++ }
++
++ /* Ok, finally something we can handle */
++ send_sigtrap(tsk, regs, error_code);
++
++ /* Disable additional traps. They'll be re-enabled when
++ * the signal is delivered.
++ */
++clear_dr7:
++ set_debugreg(0, 7);
++ return;
++
++debug_vm86:
++ handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, 1);
++ return;
++
++clear_TF_reenable:
++ set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
++ regs->eflags &= ~TF_MASK;
++ return;
++}
++
++/*
++ * Note that we play around with the 'TS' bit in an attempt to get
++ * the correct behaviour even in the presence of the asynchronous
++ * IRQ13 behaviour
++ */
++void math_error(void __user *eip)
++{
++ struct task_struct * task;
++ siginfo_t info;
++ unsigned short cwd, swd;
++
++ /*
++ * Save the info for the exception handler and clear the error.
++ */
++ task = current;
++ save_init_fpu(task);
++ task->thread.trap_no = 16;
++ task->thread.error_code = 0;
++ info.si_signo = SIGFPE;
++ info.si_errno = 0;
++ info.si_code = __SI_FAULT;
++ info.si_addr = eip;
++ /*
++ * (~cwd & swd) will mask out exceptions that are not set to unmasked
++ * status. 0x3f is the exception bits in these regs, 0x200 is the
++ * C1 reg you need in case of a stack fault, 0x040 is the stack
++ * fault bit. We should only be taking one exception at a time,
++ * so if this combination doesn't produce any single exception,
++ * then we have a bad program that isn't syncronizing its FPU usage
++ * and it will suffer the consequences since we won't be able to
++ * fully reproduce the context of the exception
++ */
++ cwd = get_fpu_cwd(task);
++ swd = get_fpu_swd(task);
++ switch (swd & ~cwd & 0x3f) {
++ case 0x000: /* No unmasked exception */
++ return;
++ default: /* Multiple exceptions */
++ break;
++ case 0x001: /* Invalid Op */
++ /*
++ * swd & 0x240 == 0x040: Stack Underflow
++ * swd & 0x240 == 0x240: Stack Overflow
++ * User must clear the SF bit (0x40) if set
++ */
++ info.si_code = FPE_FLTINV;
++ break;
++ case 0x002: /* Denormalize */
++ case 0x010: /* Underflow */
++ info.si_code = FPE_FLTUND;
++ break;
++ case 0x004: /* Zero Divide */
++ info.si_code = FPE_FLTDIV;
++ break;
++ case 0x008: /* Overflow */
++ info.si_code = FPE_FLTOVF;
++ break;
++ case 0x020: /* Precision */
++ info.si_code = FPE_FLTRES;
++ break;
++ }
++ force_sig_info(SIGFPE, &info, task);
++}
++
++fastcall void do_coprocessor_error(struct pt_regs * regs, long error_code)
++{
++ ignore_fpu_irq = 1;
++ math_error((void __user *)regs->eip);
++}
++
++static void simd_math_error(void __user *eip)
++{
++ struct task_struct * task;
++ siginfo_t info;
++ unsigned short mxcsr;
++
++ /*
++ * Save the info for the exception handler and clear the error.
++ */
++ task = current;
++ save_init_fpu(task);
++ task->thread.trap_no = 19;
++ task->thread.error_code = 0;
++ info.si_signo = SIGFPE;
++ info.si_errno = 0;
++ info.si_code = __SI_FAULT;
++ info.si_addr = eip;
++ /*
++ * The SIMD FPU exceptions are handled a little differently, as there
++ * is only a single status/control register. Thus, to determine which
++ * unmasked exception was caught we must mask the exception mask bits
++ * at 0x1f80, and then use these to mask the exception bits at 0x3f.
++ */
++ mxcsr = get_fpu_mxcsr(task);
++ switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
++ case 0x000:
++ default:
++ break;
++ case 0x001: /* Invalid Op */
++ info.si_code = FPE_FLTINV;
++ break;
++ case 0x002: /* Denormalize */
++ case 0x010: /* Underflow */
++ info.si_code = FPE_FLTUND;
++ break;
++ case 0x004: /* Zero Divide */
++ info.si_code = FPE_FLTDIV;
++ break;
++ case 0x008: /* Overflow */
++ info.si_code = FPE_FLTOVF;
++ break;
++ case 0x020: /* Precision */
++ info.si_code = FPE_FLTRES;
++ break;
++ }
++ force_sig_info(SIGFPE, &info, task);
++}
++
++fastcall void do_simd_coprocessor_error(struct pt_regs * regs,
++ long error_code)
++{
++ if (cpu_has_xmm) {
++ /* Handle SIMD FPU exceptions on PIII+ processors. */
++ ignore_fpu_irq = 1;
++ simd_math_error((void __user *)regs->eip);
++ } else {
++ /*
++ * Handle strange cache flush from user space exception
++ * in all other cases. This is undocumented behaviour.
++ */
++ if (regs->eflags & VM_MASK) {
++ handle_vm86_fault((struct kernel_vm86_regs *)regs,
++ error_code);
++ return;
++ }
++ current->thread.trap_no = 19;
++ current->thread.error_code = error_code;
++ die_if_kernel("cache flush denied", regs, error_code);
++ force_sig(SIGSEGV, current);
++ }
++}
++
++#ifndef CONFIG_XEN
++fastcall void do_spurious_interrupt_bug(struct pt_regs * regs,
++ long error_code)
++{
++#if 0
++ /* No need to warn about this any longer. */
++ printk("Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
++#endif
++}
++
++fastcall void setup_x86_bogus_stack(unsigned char * stk)
++{
++ unsigned long *switch16_ptr, *switch32_ptr;
++ struct pt_regs *regs;
++ unsigned long stack_top, stack_bot;
++ unsigned short iret_frame16_off;
++ int cpu = smp_processor_id();
++ /* reserve the space on 32bit stack for the magic switch16 pointer */
++ memmove(stk, stk + 8, sizeof(struct pt_regs));
++ switch16_ptr = (unsigned long *)(stk + sizeof(struct pt_regs));
++ regs = (struct pt_regs *)stk;
++ /* now the switch32 on 16bit stack */
++ stack_bot = (unsigned long)&per_cpu(cpu_16bit_stack, cpu);
++ stack_top = stack_bot + CPU_16BIT_STACK_SIZE;
++ switch32_ptr = (unsigned long *)(stack_top - 8);
++ iret_frame16_off = CPU_16BIT_STACK_SIZE - 8 - 20;
++ /* copy iret frame on 16bit stack */
++ memcpy((void *)(stack_bot + iret_frame16_off), ®s->eip, 20);
++ /* fill in the switch pointers */
++ switch16_ptr[0] = (regs->esp & 0xffff0000) | iret_frame16_off;
++ switch16_ptr[1] = __ESPFIX_SS;
++ switch32_ptr[0] = (unsigned long)stk + sizeof(struct pt_regs) +
++ 8 - CPU_16BIT_STACK_SIZE;
++ switch32_ptr[1] = __KERNEL_DS;
++}
++
++fastcall unsigned char * fixup_x86_bogus_stack(unsigned short sp)
++{
++ unsigned long *switch32_ptr;
++ unsigned char *stack16, *stack32;
++ unsigned long stack_top, stack_bot;
++ int len;
++ int cpu = smp_processor_id();
++ stack_bot = (unsigned long)&per_cpu(cpu_16bit_stack, cpu);
++ stack_top = stack_bot + CPU_16BIT_STACK_SIZE;
++ switch32_ptr = (unsigned long *)(stack_top - 8);
++ /* copy the data from 16bit stack to 32bit stack */
++ len = CPU_16BIT_STACK_SIZE - 8 - sp;
++ stack16 = (unsigned char *)(stack_bot + sp);
++ stack32 = (unsigned char *)
++ (switch32_ptr[0] + CPU_16BIT_STACK_SIZE - 8 - len);
++ memcpy(stack32, stack16, len);
++ return stack32;
++}
++#endif
++
++/*
++ * 'math_state_restore()' saves the current math information in the
++ * old math state array, and gets the new ones from the current task
++ *
++ * Careful.. There are problems with IBM-designed IRQ13 behaviour.
++ * Don't touch unless you *really* know how it works.
++ *
++ * Must be called with kernel preemption disabled (in this case,
++ * local interrupts are disabled at the call-site in entry.S).
++ */
++asmlinkage void math_state_restore(struct pt_regs regs)
++{
++ struct thread_info *thread = current_thread_info();
++ struct task_struct *tsk = thread->task;
++
++ /* NB. 'clts' is done for us by Xen during virtual trap. */
++ if (!tsk_used_math(tsk))
++ init_fpu(tsk);
++ restore_fpu(tsk);
++ thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
++}
++
++#ifndef CONFIG_MATH_EMULATION
++
++asmlinkage void math_emulate(long arg)
++{
++ printk(KERN_EMERG "math-emulation not enabled and no coprocessor found.\n");
++ printk(KERN_EMERG "killing %s.\n",current->comm);
++ force_sig(SIGFPE,current);
++ schedule();
++}
++
++#endif /* CONFIG_MATH_EMULATION */
++
++#ifdef CONFIG_X86_F00F_BUG
++void __init trap_init_f00f_bug(void)
++{
++ __set_fixmap(FIX_F00F_IDT, __pa(&idt_table), PAGE_KERNEL_RO);
++
++ /*
++ * Update the IDT descriptor and reload the IDT so that
++ * it uses the read-only mapped virtual address.
++ */
++ idt_descr.address = fix_to_virt(FIX_F00F_IDT);
++ load_idt(&idt_descr);
++}
++#endif
++
++
++/*
++ * NB. All these are "trap gates" (i.e. events_mask isn't set) except
++ * for those that specify <dpl>|4 in the second field.
++ */
++static trap_info_t __cpuinitdata trap_table[] = {
++ { 0, 0, __KERNEL_CS, (unsigned long)divide_error },
++ { 1, 0|4, __KERNEL_CS, (unsigned long)debug },
++ { 3, 3|4, __KERNEL_CS, (unsigned long)int3 },
++ { 4, 3, __KERNEL_CS, (unsigned long)overflow },
++ { 5, 0, __KERNEL_CS, (unsigned long)bounds },
++ { 6, 0, __KERNEL_CS, (unsigned long)invalid_op },
++ { 7, 0|4, __KERNEL_CS, (unsigned long)device_not_available },
++ { 9, 0, __KERNEL_CS, (unsigned long)coprocessor_segment_overrun },
++ { 10, 0, __KERNEL_CS, (unsigned long)invalid_TSS },
++ { 11, 0, __KERNEL_CS, (unsigned long)segment_not_present },
++ { 12, 0, __KERNEL_CS, (unsigned long)stack_segment },
++ { 13, 0, __KERNEL_CS, (unsigned long)general_protection },
++ { 14, 0|4, __KERNEL_CS, (unsigned long)page_fault },
++ { 15, 0, __KERNEL_CS, (unsigned long)fixup_4gb_segment },
++ { 16, 0, __KERNEL_CS, (unsigned long)coprocessor_error },
++ { 17, 0, __KERNEL_CS, (unsigned long)alignment_check },
++#ifdef CONFIG_X86_MCE
++ { 18, 0, __KERNEL_CS, (unsigned long)machine_check },
++#endif
++ { 19, 0, __KERNEL_CS, (unsigned long)simd_coprocessor_error },
++ { SYSCALL_VECTOR, 3, __KERNEL_CS, (unsigned long)system_call },
++ { 0, 0, 0, 0 }
++};
++
++void __init trap_init(void)
++{
++ int ret;
++
++ ret = HYPERVISOR_set_trap_table(trap_table);
++ if (ret)
++ printk("HYPERVISOR_set_trap_table failed: error %d\n", ret);
++
++ if (cpu_has_fxsr) {
++ /*
++ * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned.
++ * Generates a compile-time "error: zero width for bit-field" if
++ * the alignment is wrong.
++ */
++ struct fxsrAlignAssert {
++ int _:!(offsetof(struct task_struct,
++ thread.i387.fxsave) & 15);
++ };
++
++ printk(KERN_INFO "Enabling fast FPU save and restore... ");
++ set_in_cr4(X86_CR4_OSFXSR);
++ printk("done.\n");
++ }
++ if (cpu_has_xmm) {
++ printk(KERN_INFO "Enabling unmasked SIMD FPU exception "
++ "support... ");
++ set_in_cr4(X86_CR4_OSXMMEXCPT);
++ printk("done.\n");
++ }
++
++ /*
++ * Should be a barrier for any external CPU state.
++ */
++ cpu_init();
++}
++
++void __cpuinit smp_trap_init(trap_info_t *trap_ctxt)
++{
++ const trap_info_t *t = trap_table;
++
++ for (t = trap_table; t->address; t++) {
++ trap_ctxt[t->vector].flags = t->flags;
++ trap_ctxt[t->vector].cs = t->cs;
++ trap_ctxt[t->vector].address = t->address;
++ }
++}
++
++static int __init kstack_setup(char *s)
++{
++ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
++ return 1;
++}
++__setup("kstack=", kstack_setup);
++
++#ifdef CONFIG_STACK_UNWIND
++static int __init call_trace_setup(char *s)
++{
++ if (strcmp(s, "old") == 0)
++ call_trace = -1;
++ else if (strcmp(s, "both") == 0)
++ call_trace = 0;
++ else if (strcmp(s, "newfallback") == 0)
++ call_trace = 1;
++ else if (strcmp(s, "new") == 2)
++ call_trace = 2;
++ return 1;
++}
++__setup("call_trace=", call_trace_setup);
++#endif
+Index: head-2008-11-25/arch/x86/mach-xen/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mach-xen/Makefile 2007-06-12 13:12:48.000000000 +0200
+@@ -0,0 +1,5 @@
++#
++# Makefile for the linux kernel.
++#
++
++obj-y := setup.o
+Index: head-2008-11-25/arch/x86/mach-xen/setup.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mach-xen/setup.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,158 @@
++/*
++ * Machine specific setup for generic
++ */
++
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/init.h>
++#include <linux/interrupt.h>
++#include <linux/module.h>
++#include <asm/acpi.h>
++#include <asm/arch_hooks.h>
++#include <asm/e820.h>
++#include <asm/setup.h>
++#include <asm/fixmap.h>
++
++#include <xen/interface/callback.h>
++#include <xen/interface/memory.h>
++
++#ifdef CONFIG_HOTPLUG_CPU
++#define DEFAULT_SEND_IPI (1)
++#else
++#define DEFAULT_SEND_IPI (0)
++#endif
++
++int no_broadcast=DEFAULT_SEND_IPI;
++
++static __init int no_ipi_broadcast(char *str)
++{
++ get_option(&str, &no_broadcast);
++ printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" :
++ "IPI Broadcast");
++ return 1;
++}
++
++__setup("no_ipi_broadcast", no_ipi_broadcast);
++
++static int __init print_ipi_mode(void)
++{
++ printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" :
++ "Shortcut");
++ return 0;
++}
++
++late_initcall(print_ipi_mode);
++
++/**
++ * machine_specific_memory_setup - Hook for machine specific memory setup.
++ *
++ * Description:
++ * This is included late in kernel/setup.c so that it can make
++ * use of all of the static functions.
++ **/
++
++char * __init machine_specific_memory_setup(void)
++{
++ int rc;
++ struct xen_memory_map memmap;
++ /*
++ * This is rather large for a stack variable but this early in
++ * the boot process we know we have plenty slack space.
++ */
++ struct e820entry map[E820MAX];
++
++ memmap.nr_entries = E820MAX;
++ set_xen_guest_handle(memmap.buffer, map);
++
++ rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
++ if ( rc == -ENOSYS ) {
++ memmap.nr_entries = 1;
++ map[0].addr = 0ULL;
++ map[0].size = PFN_PHYS((unsigned long long)xen_start_info->nr_pages);
++ /* 8MB slack (to balance backend allocations). */
++ map[0].size += 8ULL << 20;
++ map[0].type = E820_RAM;
++ rc = 0;
++ }
++ BUG_ON(rc);
++
++ sanitize_e820_map(map, (char *)&memmap.nr_entries);
++
++ BUG_ON(copy_e820_map(map, (char)memmap.nr_entries) < 0);
++
++ return "Xen";
++}
++
++
++extern void hypervisor_callback(void);
++extern void failsafe_callback(void);
++extern void nmi(void);
++
++unsigned long *machine_to_phys_mapping = (void *)MACH2PHYS_VIRT_START;
++EXPORT_SYMBOL(machine_to_phys_mapping);
++unsigned int machine_to_phys_order;
++EXPORT_SYMBOL(machine_to_phys_order);
++
++void __init pre_setup_arch_hook(void)
++{
++ struct xen_machphys_mapping mapping;
++ unsigned long machine_to_phys_nr_ents;
++ struct xen_platform_parameters pp;
++
++ init_mm.pgd = swapper_pg_dir = (pgd_t *)xen_start_info->pt_base;
++
++ setup_xen_features();
++
++ if (HYPERVISOR_xen_version(XENVER_platform_parameters, &pp) == 0)
++ set_fixaddr_top(pp.virt_start);
++
++ if (HYPERVISOR_memory_op(XENMEM_machphys_mapping, &mapping) == 0) {
++ machine_to_phys_mapping = (unsigned long *)mapping.v_start;
++ machine_to_phys_nr_ents = mapping.max_mfn + 1;
++ } else
++ machine_to_phys_nr_ents = MACH2PHYS_NR_ENTRIES;
++ machine_to_phys_order = fls(machine_to_phys_nr_ents - 1);
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap))
++ phys_to_machine_mapping =
++ (unsigned long *)xen_start_info->mfn_list;
++}
++
++void __init machine_specific_arch_setup(void)
++{
++ int ret;
++ static struct callback_register __initdata event = {
++ .type = CALLBACKTYPE_event,
++ .address = { __KERNEL_CS, (unsigned long)hypervisor_callback },
++ };
++ static struct callback_register __initdata failsafe = {
++ .type = CALLBACKTYPE_failsafe,
++ .address = { __KERNEL_CS, (unsigned long)failsafe_callback },
++ };
++ static struct callback_register __initdata nmi_cb = {
++ .type = CALLBACKTYPE_nmi,
++ .address = { __KERNEL_CS, (unsigned long)nmi },
++ };
++
++ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &event);
++ if (ret == 0)
++ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &failsafe);
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (ret == -ENOSYS)
++ ret = HYPERVISOR_set_callbacks(
++ event.address.cs, event.address.eip,
++ failsafe.address.cs, failsafe.address.eip);
++#endif
++ BUG_ON(ret);
++
++ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &nmi_cb);
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (ret == -ENOSYS) {
++ static struct xennmi_callback __initdata cb = {
++ .handler_address = (unsigned long)nmi
++ };
++
++ HYPERVISOR_nmi_op(XENNMI_register_callback, &cb);
++ }
++#endif
++}
+Index: head-2008-11-25/arch/x86/lib/scrub.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/lib/scrub.c 2008-02-08 12:30:51.000000000 +0100
+@@ -0,0 +1,21 @@
++#include <asm/cpufeature.h>
++#include <asm/page.h>
++#include <asm/processor.h>
++
++void scrub_pages(void *v, unsigned int count)
++{
++ if (likely(cpu_has_xmm2)) {
++ unsigned long n = count * (PAGE_SIZE / sizeof(long) / 4);
++
++ for (; n--; v += sizeof(long) * 4)
++ asm("movnti %1,(%0)\n\t"
++ "movnti %1,%c2(%0)\n\t"
++ "movnti %1,2*%c2(%0)\n\t"
++ "movnti %1,3*%c2(%0)\n\t"
++ : : "r" (v), "r" (0L), "i" (sizeof(long))
++ : "memory");
++ asm volatile("sfence" : : : "memory");
++ } else
++ for (; count--; v += PAGE_SIZE)
++ clear_page(v);
++}
+Index: head-2008-11-25/arch/x86/mm/fault_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/fault_32-xen.c 2007-12-10 08:47:31.000000000 +0100
+@@ -0,0 +1,779 @@
++/*
++ * linux/arch/i386/mm/fault.c
++ *
++ * Copyright (C) 1995 Linus Torvalds
++ */
++
++#include <linux/signal.h>
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/types.h>
++#include <linux/ptrace.h>
++#include <linux/mman.h>
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/smp_lock.h>
++#include <linux/interrupt.h>
++#include <linux/init.h>
++#include <linux/tty.h>
++#include <linux/vt_kern.h> /* For unblank_screen() */
++#include <linux/highmem.h>
++#include <linux/module.h>
++#include <linux/kprobes.h>
++
++#include <asm/system.h>
++#include <asm/uaccess.h>
++#include <asm/desc.h>
++#include <asm/kdebug.h>
++
++extern void die(const char *,struct pt_regs *,long);
++
++#ifdef CONFIG_KPROBES
++ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
++int register_page_fault_notifier(struct notifier_block *nb)
++{
++ vmalloc_sync_all();
++ return atomic_notifier_chain_register(¬ify_page_fault_chain, nb);
++}
++
++int unregister_page_fault_notifier(struct notifier_block *nb)
++{
++ return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb);
++}
++
++static inline int notify_page_fault(enum die_val val, const char *str,
++ struct pt_regs *regs, long err, int trap, int sig)
++{
++ struct die_args args = {
++ .regs = regs,
++ .str = str,
++ .err = err,
++ .trapnr = trap,
++ .signr = sig
++ };
++ return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args);
++}
++#else
++static inline int notify_page_fault(enum die_val val, const char *str,
++ struct pt_regs *regs, long err, int trap, int sig)
++{
++ return NOTIFY_DONE;
++}
++#endif
++
++
++/*
++ * Unlock any spinlocks which will prevent us from getting the
++ * message out
++ */
++void bust_spinlocks(int yes)
++{
++ int loglevel_save = console_loglevel;
++
++ if (yes) {
++ oops_in_progress = 1;
++ return;
++ }
++#ifdef CONFIG_VT
++ unblank_screen();
++#endif
++ oops_in_progress = 0;
++ /*
++ * OK, the message is on the console. Now we call printk()
++ * without oops_in_progress set so that printk will give klogd
++ * a poke. Hold onto your hats...
++ */
++ console_loglevel = 15; /* NMI oopser may have shut the console up */
++ printk(" ");
++ console_loglevel = loglevel_save;
++}
++
++/*
++ * Return EIP plus the CS segment base. The segment limit is also
++ * adjusted, clamped to the kernel/user address space (whichever is
++ * appropriate), and returned in *eip_limit.
++ *
++ * The segment is checked, because it might have been changed by another
++ * task between the original faulting instruction and here.
++ *
++ * If CS is no longer a valid code segment, or if EIP is beyond the
++ * limit, or if it is a kernel address when CS is not a kernel segment,
++ * then the returned value will be greater than *eip_limit.
++ *
++ * This is slow, but is very rarely executed.
++ */
++static inline unsigned long get_segment_eip(struct pt_regs *regs,
++ unsigned long *eip_limit)
++{
++ unsigned long eip = regs->eip;
++ unsigned seg = regs->xcs & 0xffff;
++ u32 seg_ar, seg_limit, base, *desc;
++
++ /* Unlikely, but must come before segment checks. */
++ if (unlikely(regs->eflags & VM_MASK)) {
++ base = seg << 4;
++ *eip_limit = base + 0xffff;
++ return base + (eip & 0xffff);
++ }
++
++ /* The standard kernel/user address space limit. */
++ *eip_limit = (seg & 2) ? USER_DS.seg : KERNEL_DS.seg;
++
++ /* By far the most common cases. */
++ if (likely(seg == __USER_CS || seg == GET_KERNEL_CS()))
++ return eip;
++
++ /* Check the segment exists, is within the current LDT/GDT size,
++ that kernel/user (ring 0..3) has the appropriate privilege,
++ that it's a code segment, and get the limit. */
++ __asm__ ("larl %3,%0; lsll %3,%1"
++ : "=&r" (seg_ar), "=r" (seg_limit) : "0" (0), "rm" (seg));
++ if ((~seg_ar & 0x9800) || eip > seg_limit) {
++ *eip_limit = 0;
++ return 1; /* So that returned eip > *eip_limit. */
++ }
++
++ /* Get the GDT/LDT descriptor base.
++ When you look for races in this code remember that
++ LDT and other horrors are only used in user space. */
++ if (seg & (1<<2)) {
++ /* Must lock the LDT while reading it. */
++ down(¤t->mm->context.sem);
++ desc = current->mm->context.ldt;
++ desc = (void *)desc + (seg & ~7);
++ } else {
++ /* Must disable preemption while reading the GDT. */
++ desc = (u32 *)get_cpu_gdt_table(get_cpu());
++ desc = (void *)desc + (seg & ~7);
++ }
++
++ /* Decode the code segment base from the descriptor */
++ base = get_desc_base((unsigned long *)desc);
++
++ if (seg & (1<<2)) {
++ up(¤t->mm->context.sem);
++ } else
++ put_cpu();
++
++ /* Adjust EIP and segment limit, and clamp at the kernel limit.
++ It's legitimate for segments to wrap at 0xffffffff. */
++ seg_limit += base;
++ if (seg_limit < *eip_limit && seg_limit >= base)
++ *eip_limit = seg_limit;
++ return eip + base;
++}
++
++/*
++ * Sometimes AMD Athlon/Opteron CPUs report invalid exceptions on prefetch.
++ * Check that here and ignore it.
++ */
++static int __is_prefetch(struct pt_regs *regs, unsigned long addr)
++{
++ unsigned long limit;
++ unsigned long instr = get_segment_eip (regs, &limit);
++ int scan_more = 1;
++ int prefetch = 0;
++ int i;
++
++ for (i = 0; scan_more && i < 15; i++) {
++ unsigned char opcode;
++ unsigned char instr_hi;
++ unsigned char instr_lo;
++
++ if (instr > limit)
++ break;
++ if (__get_user(opcode, (unsigned char __user *) instr))
++ break;
++
++ instr_hi = opcode & 0xf0;
++ instr_lo = opcode & 0x0f;
++ instr++;
++
++ switch (instr_hi) {
++ case 0x20:
++ case 0x30:
++ /* Values 0x26,0x2E,0x36,0x3E are valid x86 prefixes. */
++ scan_more = ((instr_lo & 7) == 0x6);
++ break;
++
++ case 0x60:
++ /* 0x64 thru 0x67 are valid prefixes in all modes. */
++ scan_more = (instr_lo & 0xC) == 0x4;
++ break;
++ case 0xF0:
++ /* 0xF0, 0xF2, and 0xF3 are valid prefixes */
++ scan_more = !instr_lo || (instr_lo>>1) == 1;
++ break;
++ case 0x00:
++ /* Prefetch instruction is 0x0F0D or 0x0F18 */
++ scan_more = 0;
++ if (instr > limit)
++ break;
++ if (__get_user(opcode, (unsigned char __user *) instr))
++ break;
++ prefetch = (instr_lo == 0xF) &&
++ (opcode == 0x0D || opcode == 0x18);
++ break;
++ default:
++ scan_more = 0;
++ break;
++ }
++ }
++ return prefetch;
++}
++
++static inline int is_prefetch(struct pt_regs *regs, unsigned long addr,
++ unsigned long error_code)
++{
++ if (unlikely(boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
++ boot_cpu_data.x86 >= 6)) {
++ /* Catch an obscure case of prefetch inside an NX page. */
++ if (nx_enabled && (error_code & 16))
++ return 0;
++ return __is_prefetch(regs, addr);
++ }
++ return 0;
++}
++
++static noinline void force_sig_info_fault(int si_signo, int si_code,
++ unsigned long address, struct task_struct *tsk)
++{
++ siginfo_t info;
++
++ info.si_signo = si_signo;
++ info.si_errno = 0;
++ info.si_code = si_code;
++ info.si_addr = (void __user *)address;
++ force_sig_info(si_signo, &info, tsk);
++}
++
++fastcall void do_invalid_op(struct pt_regs *, unsigned long);
++
++#ifdef CONFIG_X86_PAE
++static void dump_fault_path(unsigned long address)
++{
++ unsigned long *p, page;
++ unsigned long mfn;
++
++ page = read_cr3();
++ p = (unsigned long *)__va(page);
++ p += (address >> 30) * 2;
++ printk(KERN_ALERT "%08lx -> *pde = %08lx:%08lx\n", page, p[1], p[0]);
++ if (p[0] & _PAGE_PRESENT) {
++ mfn = (p[0] >> PAGE_SHIFT) | (p[1] << 20);
++ page = mfn_to_pfn(mfn) << PAGE_SHIFT;
++ p = (unsigned long *)__va(page);
++ address &= 0x3fffffff;
++ p += (address >> 21) * 2;
++ printk(KERN_ALERT "%08lx -> *pme = %08lx:%08lx\n",
++ page, p[1], p[0]);
++ mfn = (p[0] >> PAGE_SHIFT) | (p[1] << 20);
++#ifdef CONFIG_HIGHPTE
++ if (mfn_to_pfn(mfn) >= highstart_pfn)
++ return;
++#endif
++ if (p[0] & _PAGE_PRESENT) {
++ page = mfn_to_pfn(mfn) << PAGE_SHIFT;
++ p = (unsigned long *) __va(page);
++ address &= 0x001fffff;
++ p += (address >> 12) * 2;
++ printk(KERN_ALERT "%08lx -> *pte = %08lx:%08lx\n",
++ page, p[1], p[0]);
++ }
++ }
++}
++#else
++static void dump_fault_path(unsigned long address)
++{
++ unsigned long page;
++
++ page = read_cr3();
++ page = ((unsigned long *) __va(page))[address >> 22];
++ if (oops_may_print())
++ printk(KERN_ALERT "*pde = ma %08lx pa %08lx\n", page,
++ machine_to_phys(page));
++ /*
++ * We must not directly access the pte in the highpte
++ * case if the page table is located in highmem.
++ * And lets rather not kmap-atomic the pte, just in case
++ * it's allocated already.
++ */
++#ifdef CONFIG_HIGHPTE
++ if ((page >> PAGE_SHIFT) >= highstart_pfn)
++ return;
++#endif
++ if ((page & 1) && oops_may_print()) {
++ page &= PAGE_MASK;
++ address &= 0x003ff000;
++ page = machine_to_phys(page);
++ page = ((unsigned long *) __va(page))[address >> PAGE_SHIFT];
++ printk(KERN_ALERT "*pte = ma %08lx pa %08lx\n", page,
++ machine_to_phys(page));
++ }
++}
++#endif
++
++static int spurious_fault(struct pt_regs *regs,
++ unsigned long address,
++ unsigned long error_code)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++
++ /* Reserved-bit violation or user access to kernel space? */
++ if (error_code & 0x0c)
++ return 0;
++
++ pgd = init_mm.pgd + pgd_index(address);
++ if (!pgd_present(*pgd))
++ return 0;
++
++ pud = pud_offset(pgd, address);
++ if (!pud_present(*pud))
++ return 0;
++
++ pmd = pmd_offset(pud, address);
++ if (!pmd_present(*pmd))
++ return 0;
++
++ pte = pte_offset_kernel(pmd, address);
++ if (!pte_present(*pte))
++ return 0;
++ if ((error_code & 0x02) && !pte_write(*pte))
++ return 0;
++#ifdef CONFIG_X86_PAE
++ if ((error_code & 0x10) && (__pte_val(*pte) & _PAGE_NX))
++ return 0;
++#endif
++
++ return 1;
++}
++
++static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
++{
++ unsigned index = pgd_index(address);
++ pgd_t *pgd_k;
++ pud_t *pud, *pud_k;
++ pmd_t *pmd, *pmd_k;
++
++ pgd += index;
++ pgd_k = init_mm.pgd + index;
++
++ if (!pgd_present(*pgd_k))
++ return NULL;
++
++ /*
++ * set_pgd(pgd, *pgd_k); here would be useless on PAE
++ * and redundant with the set_pmd() on non-PAE. As would
++ * set_pud.
++ */
++
++ pud = pud_offset(pgd, address);
++ pud_k = pud_offset(pgd_k, address);
++ if (!pud_present(*pud_k))
++ return NULL;
++
++ pmd = pmd_offset(pud, address);
++ pmd_k = pmd_offset(pud_k, address);
++ if (!pmd_present(*pmd_k))
++ return NULL;
++ if (!pmd_present(*pmd))
++#if CONFIG_XEN_COMPAT > 0x030002
++ set_pmd(pmd, *pmd_k);
++#else
++ /*
++ * When running on older Xen we must launder *pmd_k through
++ * pmd_val() to ensure that _PAGE_PRESENT is correctly set.
++ */
++ set_pmd(pmd, __pmd(pmd_val(*pmd_k)));
++#endif
++ else
++ BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
++ return pmd_k;
++}
++
++/*
++ * Handle a fault on the vmalloc or module mapping area
++ *
++ * This assumes no large pages in there.
++ */
++static inline int vmalloc_fault(unsigned long address)
++{
++ unsigned long pgd_paddr;
++ pmd_t *pmd_k;
++ pte_t *pte_k;
++ /*
++ * Synchronize this task's top level page-table
++ * with the 'reference' page table.
++ *
++ * Do _not_ use "current" here. We might be inside
++ * an interrupt in the middle of a task switch..
++ */
++ pgd_paddr = read_cr3();
++ pmd_k = vmalloc_sync_one(__va(pgd_paddr), address);
++ if (!pmd_k)
++ return -1;
++ pte_k = pte_offset_kernel(pmd_k, address);
++ if (!pte_present(*pte_k))
++ return -1;
++ return 0;
++}
++
++/*
++ * This routine handles page faults. It determines the address,
++ * and the problem, and then passes it off to one of the appropriate
++ * routines.
++ *
++ * error_code:
++ * bit 0 == 0 means no page found, 1 means protection fault
++ * bit 1 == 0 means read, 1 means write
++ * bit 2 == 0 means kernel, 1 means user-mode
++ * bit 3 == 1 means use of reserved bit detected
++ * bit 4 == 1 means fault was an instruction fetch
++ */
++fastcall void __kprobes do_page_fault(struct pt_regs *regs,
++ unsigned long error_code)
++{
++ struct task_struct *tsk;
++ struct mm_struct *mm;
++ struct vm_area_struct * vma;
++ unsigned long address;
++ int write, si_code;
++
++ /* get the address */
++ address = read_cr2();
++
++ /* Set the "privileged fault" bit to something sane. */
++ error_code &= ~4;
++ error_code |= (regs->xcs & 2) << 1;
++ if (regs->eflags & X86_EFLAGS_VM)
++ error_code |= 4;
++
++ tsk = current;
++
++ si_code = SEGV_MAPERR;
++
++ /*
++ * We fault-in kernel-space virtual memory on-demand. The
++ * 'reference' page table is init_mm.pgd.
++ *
++ * NOTE! We MUST NOT take any locks for this case. We may
++ * be in an interrupt or a critical region, and should
++ * only copy the information from the master page table,
++ * nothing more.
++ *
++ * This verifies that the fault happens in kernel space
++ * (error_code & 4) == 0, and that the fault was not a
++ * protection error (error_code & 9) == 0.
++ */
++ if (unlikely(address >= TASK_SIZE)) {
++#ifdef CONFIG_XEN
++ /* Faults in hypervisor area can never be patched up. */
++ if (address >= hypervisor_virt_start)
++ goto bad_area_nosemaphore;
++#endif
++ if (!(error_code & 0x0000000d) && vmalloc_fault(address) >= 0)
++ return;
++ /* Can take a spurious fault if mapping changes R/O -> R/W. */
++ if (spurious_fault(regs, address, error_code))
++ return;
++ if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
++ SIGSEGV) == NOTIFY_STOP)
++ return;
++ /*
++ * Don't take the mm semaphore here. If we fixup a prefetch
++ * fault we could otherwise deadlock.
++ */
++ goto bad_area_nosemaphore;
++ }
++
++ if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
++ SIGSEGV) == NOTIFY_STOP)
++ return;
++
++ /* It's safe to allow irq's after cr2 has been saved and the vmalloc
++ fault has been handled. */
++ if (regs->eflags & (X86_EFLAGS_IF|VM_MASK))
++ local_irq_enable();
++
++ mm = tsk->mm;
++
++ /*
++ * If we're in an interrupt, have no user context or are running in an
++ * atomic region then we must not take the fault..
++ */
++ if (in_atomic() || !mm)
++ goto bad_area_nosemaphore;
++
++ /* When running in the kernel we expect faults to occur only to
++ * addresses in user space. All other faults represent errors in the
++ * kernel and should generate an OOPS. Unfortunatly, in the case of an
++ * erroneous fault occurring in a code path which already holds mmap_sem
++ * we will deadlock attempting to validate the fault against the
++ * address space. Luckily the kernel only validly references user
++ * space from well defined areas of code, which are listed in the
++ * exceptions table.
++ *
++ * As the vast majority of faults will be valid we will only perform
++ * the source reference check when there is a possibilty of a deadlock.
++ * Attempt to lock the address space, if we cannot we then validate the
++ * source. If this is invalid we can skip the address space check,
++ * thus avoiding the deadlock.
++ */
++ if (!down_read_trylock(&mm->mmap_sem)) {
++ if ((error_code & 4) == 0 &&
++ !search_exception_tables(regs->eip))
++ goto bad_area_nosemaphore;
++ down_read(&mm->mmap_sem);
++ }
++
++ vma = find_vma(mm, address);
++ if (!vma)
++ goto bad_area;
++ if (vma->vm_start <= address)
++ goto good_area;
++ if (!(vma->vm_flags & VM_GROWSDOWN))
++ goto bad_area;
++ if (error_code & 4) {
++ /*
++ * Accessing the stack below %esp is always a bug.
++ * The large cushion allows instructions like enter
++ * and pusha to work. ("enter $65535,$31" pushes
++ * 32 pointers and then decrements %esp by 65535.)
++ */
++ if (address + 65536 + 32 * sizeof(unsigned long) < regs->esp)
++ goto bad_area;
++ }
++ if (expand_stack(vma, address))
++ goto bad_area;
++/*
++ * Ok, we have a good vm_area for this memory access, so
++ * we can handle it..
++ */
++good_area:
++ si_code = SEGV_ACCERR;
++ write = 0;
++ switch (error_code & 3) {
++ default: /* 3: write, present */
++#ifdef TEST_VERIFY_AREA
++ if (regs->cs == GET_KERNEL_CS())
++ printk("WP fault at %08lx\n", regs->eip);
++#endif
++ /* fall through */
++ case 2: /* write, not present */
++ if (!(vma->vm_flags & VM_WRITE))
++ goto bad_area;
++ write++;
++ break;
++ case 1: /* read, present */
++ goto bad_area;
++ case 0: /* read, not present */
++ if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
++ goto bad_area;
++ }
++
++ survive:
++ /*
++ * If for any reason at all we couldn't handle the fault,
++ * make sure we exit gracefully rather than endlessly redo
++ * the fault.
++ */
++ switch (handle_mm_fault(mm, vma, address, write)) {
++ case VM_FAULT_MINOR:
++ tsk->min_flt++;
++ break;
++ case VM_FAULT_MAJOR:
++ tsk->maj_flt++;
++ break;
++ case VM_FAULT_SIGBUS:
++ goto do_sigbus;
++ case VM_FAULT_OOM:
++ goto out_of_memory;
++ default:
++ BUG();
++ }
++
++ /*
++ * Did it hit the DOS screen memory VA from vm86 mode?
++ */
++ if (regs->eflags & VM_MASK) {
++ unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
++ if (bit < 32)
++ tsk->thread.screen_bitmap |= 1 << bit;
++ }
++ up_read(&mm->mmap_sem);
++ return;
++
++/*
++ * Something tried to access memory that isn't in our memory map..
++ * Fix it, but check if it's kernel or user first..
++ */
++bad_area:
++ up_read(&mm->mmap_sem);
++
++bad_area_nosemaphore:
++ /* User mode accesses just cause a SIGSEGV */
++ if (error_code & 4) {
++ /*
++ * Valid to do another page fault here because this one came
++ * from user space.
++ */
++ if (is_prefetch(regs, address, error_code))
++ return;
++
++ tsk->thread.cr2 = address;
++ /* Kernel addresses are always protection faults */
++ tsk->thread.error_code = error_code | (address >= TASK_SIZE);
++ tsk->thread.trap_no = 14;
++ force_sig_info_fault(SIGSEGV, si_code, address, tsk);
++ return;
++ }
++
++#ifdef CONFIG_X86_F00F_BUG
++ /*
++ * Pentium F0 0F C7 C8 bug workaround.
++ */
++ if (boot_cpu_data.f00f_bug) {
++ unsigned long nr;
++
++ nr = (address - idt_descr.address) >> 3;
++
++ if (nr == 6) {
++ do_invalid_op(regs, 0);
++ return;
++ }
++ }
++#endif
++
++no_context:
++ /* Are we prepared to handle this kernel fault? */
++ if (fixup_exception(regs))
++ return;
++
++ /*
++ * Valid to do another page fault here, because if this fault
++ * had been triggered by is_prefetch fixup_exception would have
++ * handled it.
++ */
++ if (is_prefetch(regs, address, error_code))
++ return;
++
++/*
++ * Oops. The kernel tried to access some bad page. We'll have to
++ * terminate things with extreme prejudice.
++ */
++
++ bust_spinlocks(1);
++
++ if (oops_may_print()) {
++ #ifdef CONFIG_X86_PAE
++ if (error_code & 16) {
++ pte_t *pte = lookup_address(address);
++
++ if (pte && pte_present(*pte) && !pte_exec_kernel(*pte))
++ printk(KERN_CRIT "kernel tried to execute "
++ "NX-protected page - exploit attempt? "
++ "(uid: %d)\n", current->uid);
++ }
++ #endif
++ if (address < PAGE_SIZE)
++ printk(KERN_ALERT "BUG: unable to handle kernel NULL "
++ "pointer dereference");
++ else
++ printk(KERN_ALERT "BUG: unable to handle kernel paging"
++ " request");
++ printk(" at virtual address %08lx\n",address);
++ printk(KERN_ALERT " printing eip:\n");
++ printk("%08lx\n", regs->eip);
++ }
++ dump_fault_path(address);
++ tsk->thread.cr2 = address;
++ tsk->thread.trap_no = 14;
++ tsk->thread.error_code = error_code;
++ die("Oops", regs, error_code);
++ bust_spinlocks(0);
++ do_exit(SIGKILL);
++
++/*
++ * We ran out of memory, or some other thing happened to us that made
++ * us unable to handle the page fault gracefully.
++ */
++out_of_memory:
++ up_read(&mm->mmap_sem);
++ if (tsk->pid == 1) {
++ yield();
++ down_read(&mm->mmap_sem);
++ goto survive;
++ }
++ printk("VM: killing process %s\n", tsk->comm);
++ if (error_code & 4)
++ do_exit(SIGKILL);
++ goto no_context;
++
++do_sigbus:
++ up_read(&mm->mmap_sem);
++
++ /* Kernel mode? Handle exceptions or die */
++ if (!(error_code & 4))
++ goto no_context;
++
++ /* User space => ok to do another page fault */
++ if (is_prefetch(regs, address, error_code))
++ return;
++
++ tsk->thread.cr2 = address;
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 14;
++ force_sig_info_fault(SIGBUS, BUS_ADRERR, address, tsk);
++}
++
++#if !HAVE_SHARED_KERNEL_PMD
++void vmalloc_sync_all(void)
++{
++ /*
++ * Note that races in the updates of insync and start aren't
++ * problematic: insync can only get set bits added, and updates to
++ * start are only improving performance (without affecting correctness
++ * if undone).
++ * XEN: To work on PAE, we need to iterate over PMDs rather than PGDs.
++ * This change works just fine with 2-level paging too.
++ */
++#define sync_index(a) ((a) >> PMD_SHIFT)
++ static DECLARE_BITMAP(insync, PTRS_PER_PGD*PTRS_PER_PMD);
++ static unsigned long start = TASK_SIZE;
++ unsigned long address;
++
++ BUILD_BUG_ON(TASK_SIZE & ~PGDIR_MASK);
++ for (address = start;
++ address >= TASK_SIZE && address < hypervisor_virt_start;
++ address += 1UL << PMD_SHIFT) {
++ if (!test_bit(sync_index(address), insync)) {
++ unsigned long flags;
++ struct page *page;
++
++ spin_lock_irqsave(&pgd_lock, flags);
++ /* XEN: failure path assumes non-empty pgd_list. */
++ if (unlikely(!pgd_list)) {
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ return;
++ }
++ for (page = pgd_list; page; page =
++ (struct page *)page->index)
++ if (!vmalloc_sync_one(page_address(page),
++ address)) {
++ BUG_ON(page != pgd_list);
++ break;
++ }
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ if (!page)
++ set_bit(sync_index(address), insync);
++ }
++ if (address == start && test_bit(sync_index(address), insync))
++ start = address + (1UL << PMD_SHIFT);
++ }
++}
++#endif
+Index: head-2008-11-25/arch/x86/mm/highmem_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/highmem_32-xen.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,183 @@
++#include <linux/highmem.h>
++#include <linux/module.h>
++
++void *kmap(struct page *page)
++{
++ might_sleep();
++ if (!PageHighMem(page))
++ return page_address(page);
++ return kmap_high(page);
++}
++
++void kunmap(struct page *page)
++{
++ if (in_interrupt())
++ BUG();
++ if (!PageHighMem(page))
++ return;
++ kunmap_high(page);
++}
++
++/*
++ * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because
++ * no global lock is needed and because the kmap code must perform a global TLB
++ * invalidation when the kmap pool wraps.
++ *
++ * However when holding an atomic kmap is is not legal to sleep, so atomic
++ * kmaps are appropriate for short, tight code paths only.
++ */
++static void *__kmap_atomic(struct page *page, enum km_type type, pgprot_t prot)
++{
++ enum fixed_addresses idx;
++ unsigned long vaddr;
++
++ /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
++ inc_preempt_count();
++ if (!PageHighMem(page))
++ return page_address(page);
++
++ idx = type + KM_TYPE_NR*smp_processor_id();
++ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
++#ifdef CONFIG_DEBUG_HIGHMEM
++ if (!pte_none(*(kmap_pte-idx)))
++ BUG();
++#endif
++ set_pte_at_sync(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
++
++ return (void*) vaddr;
++}
++
++void *kmap_atomic(struct page *page, enum km_type type)
++{
++ return __kmap_atomic(page, type, kmap_prot);
++}
++
++/* Same as kmap_atomic but with PAGE_KERNEL_RO page protection. */
++void *kmap_atomic_pte(struct page *page, enum km_type type)
++{
++ return __kmap_atomic(page, type,
++ test_bit(PG_pinned, &page->flags)
++ ? PAGE_KERNEL_RO : kmap_prot);
++}
++
++void kunmap_atomic(void *kvaddr, enum km_type type)
++{
++#if defined(CONFIG_DEBUG_HIGHMEM) || defined(CONFIG_XEN)
++ unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
++ enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
++
++ if (vaddr < FIXADDR_START) { // FIXME
++ dec_preempt_count();
++ preempt_check_resched();
++ return;
++ }
++#endif
++
++#if defined(CONFIG_DEBUG_HIGHMEM)
++ if (vaddr != __fix_to_virt(FIX_KMAP_BEGIN+idx))
++ BUG();
++
++ /*
++ * force other mappings to Oops if they'll try to access
++ * this pte without first remap it
++ */
++ pte_clear(&init_mm, vaddr, kmap_pte-idx);
++ __flush_tlb_one(vaddr);
++#elif defined(CONFIG_XEN)
++ /*
++ * We must ensure there are no dangling pagetable references when
++ * returning memory to Xen (decrease_reservation).
++ * XXX TODO: We could make this faster by only zapping when
++ * kmap_flush_unused is called but that is trickier and more invasive.
++ */
++ pte_clear(&init_mm, vaddr, kmap_pte-idx);
++#endif
++
++ dec_preempt_count();
++ preempt_check_resched();
++}
++
++/* This is the same as kmap_atomic() but can map memory that doesn't
++ * have a struct page associated with it.
++ */
++void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
++{
++ enum fixed_addresses idx;
++ unsigned long vaddr;
++
++ inc_preempt_count();
++
++ idx = type + KM_TYPE_NR*smp_processor_id();
++ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
++ set_pte(kmap_pte-idx, pfn_pte(pfn, kmap_prot));
++ __flush_tlb_one(vaddr);
++
++ return (void*) vaddr;
++}
++
++struct page *kmap_atomic_to_page(void *ptr)
++{
++ unsigned long idx, vaddr = (unsigned long)ptr;
++ pte_t *pte;
++
++ if (vaddr < FIXADDR_START)
++ return virt_to_page(ptr);
++
++ idx = virt_to_fix(vaddr);
++ pte = kmap_pte - (idx - FIX_KMAP_BEGIN);
++ return pte_page(*pte);
++}
++
++void clear_highpage(struct page *page)
++{
++ void *kaddr;
++
++ if (likely(xen_feature(XENFEAT_highmem_assist))
++ && PageHighMem(page)) {
++ struct mmuext_op meo;
++
++ meo.cmd = MMUEXT_CLEAR_PAGE;
++ meo.arg1.mfn = pfn_to_mfn(page_to_pfn(page));
++ if (HYPERVISOR_mmuext_op(&meo, 1, NULL, DOMID_SELF) == 0)
++ return;
++ }
++
++ kaddr = kmap_atomic(page, KM_USER0);
++ clear_page(kaddr);
++ kunmap_atomic(kaddr, KM_USER0);
++}
++
++void copy_highpage(struct page *to, struct page *from)
++{
++ void *vfrom, *vto;
++
++ if (likely(xen_feature(XENFEAT_highmem_assist))
++ && (PageHighMem(from) || PageHighMem(to))) {
++ unsigned long from_pfn = page_to_pfn(from);
++ unsigned long to_pfn = page_to_pfn(to);
++ struct mmuext_op meo;
++
++ meo.cmd = MMUEXT_COPY_PAGE;
++ meo.arg1.mfn = pfn_to_mfn(to_pfn);
++ meo.arg2.src_mfn = pfn_to_mfn(from_pfn);
++ if (mfn_to_pfn(meo.arg2.src_mfn) == from_pfn
++ && mfn_to_pfn(meo.arg1.mfn) == to_pfn
++ && HYPERVISOR_mmuext_op(&meo, 1, NULL, DOMID_SELF) == 0)
++ return;
++ }
++
++ vfrom = kmap_atomic(from, KM_USER0);
++ vto = kmap_atomic(to, KM_USER1);
++ copy_page(vto, vfrom);
++ kunmap_atomic(vfrom, KM_USER0);
++ kunmap_atomic(vto, KM_USER1);
++}
++
++EXPORT_SYMBOL(kmap);
++EXPORT_SYMBOL(kunmap);
++EXPORT_SYMBOL(kmap_atomic);
++EXPORT_SYMBOL(kmap_atomic_pte);
++EXPORT_SYMBOL(kunmap_atomic);
++EXPORT_SYMBOL(kmap_atomic_to_page);
++EXPORT_SYMBOL(clear_highpage);
++EXPORT_SYMBOL(copy_highpage);
+Index: head-2008-11-25/arch/x86/mm/hypervisor.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/hypervisor.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,547 @@
++/******************************************************************************
++ * mm/hypervisor.c
++ *
++ * Update page tables via the hypervisor.
++ *
++ * Copyright (c) 2002-2004, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/sched.h>
++#include <linux/mm.h>
++#include <linux/vmalloc.h>
++#include <asm/page.h>
++#include <asm/pgtable.h>
++#include <asm/hypervisor.h>
++#include <xen/balloon.h>
++#include <xen/features.h>
++#include <xen/interface/memory.h>
++#include <linux/module.h>
++#include <linux/percpu.h>
++#include <asm/tlbflush.h>
++#include <linux/highmem.h>
++
++void xen_l1_entry_update(pte_t *ptr, pte_t val)
++{
++ mmu_update_t u;
++#ifdef CONFIG_HIGHPTE
++ u.ptr = ((unsigned long)ptr >= (unsigned long)high_memory) ?
++ arbitrary_virt_to_machine(ptr) : virt_to_machine(ptr);
++#else
++ u.ptr = virt_to_machine(ptr);
++#endif
++ u.val = __pte_val(val);
++ BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0);
++}
++EXPORT_SYMBOL_GPL(xen_l1_entry_update);
++
++void xen_l2_entry_update(pmd_t *ptr, pmd_t val)
++{
++ mmu_update_t u;
++ u.ptr = virt_to_machine(ptr);
++ u.val = __pmd_val(val);
++ BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0);
++}
++
++#if defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
++void xen_l3_entry_update(pud_t *ptr, pud_t val)
++{
++ mmu_update_t u;
++ u.ptr = virt_to_machine(ptr);
++ u.val = __pud_val(val);
++ BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0);
++}
++#endif
++
++#ifdef CONFIG_X86_64
++void xen_l4_entry_update(pgd_t *ptr, pgd_t val)
++{
++ mmu_update_t u;
++ u.ptr = virt_to_machine(ptr);
++ u.val = __pgd_val(val);
++ BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0);
++}
++#endif /* CONFIG_X86_64 */
++
++void xen_pt_switch(unsigned long ptr)
++{
++ struct mmuext_op op;
++ op.cmd = MMUEXT_NEW_BASEPTR;
++ op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++void xen_new_user_pt(unsigned long ptr)
++{
++ struct mmuext_op op;
++ op.cmd = MMUEXT_NEW_USER_BASEPTR;
++ op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++void xen_tlb_flush(void)
++{
++ struct mmuext_op op;
++ op.cmd = MMUEXT_TLB_FLUSH_LOCAL;
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++EXPORT_SYMBOL(xen_tlb_flush);
++
++void xen_invlpg(unsigned long ptr)
++{
++ struct mmuext_op op;
++ op.cmd = MMUEXT_INVLPG_LOCAL;
++ op.arg1.linear_addr = ptr & PAGE_MASK;
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++EXPORT_SYMBOL(xen_invlpg);
++
++#ifdef CONFIG_SMP
++
++void xen_tlb_flush_all(void)
++{
++ struct mmuext_op op;
++ op.cmd = MMUEXT_TLB_FLUSH_ALL;
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++void xen_tlb_flush_mask(cpumask_t *mask)
++{
++ struct mmuext_op op;
++ if ( cpus_empty(*mask) )
++ return;
++ op.cmd = MMUEXT_TLB_FLUSH_MULTI;
++ set_xen_guest_handle(op.arg2.vcpumask, mask->bits);
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++void xen_invlpg_all(unsigned long ptr)
++{
++ struct mmuext_op op;
++ op.cmd = MMUEXT_INVLPG_ALL;
++ op.arg1.linear_addr = ptr & PAGE_MASK;
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++void xen_invlpg_mask(cpumask_t *mask, unsigned long ptr)
++{
++ struct mmuext_op op;
++ if ( cpus_empty(*mask) )
++ return;
++ op.cmd = MMUEXT_INVLPG_MULTI;
++ op.arg1.linear_addr = ptr & PAGE_MASK;
++ set_xen_guest_handle(op.arg2.vcpumask, mask->bits);
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++#endif /* CONFIG_SMP */
++
++void xen_pgd_pin(unsigned long ptr)
++{
++ struct mmuext_op op;
++#ifdef CONFIG_X86_64
++ op.cmd = MMUEXT_PIN_L4_TABLE;
++#elif defined(CONFIG_X86_PAE)
++ op.cmd = MMUEXT_PIN_L3_TABLE;
++#else
++ op.cmd = MMUEXT_PIN_L2_TABLE;
++#endif
++ op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++void xen_pgd_unpin(unsigned long ptr)
++{
++ struct mmuext_op op;
++ op.cmd = MMUEXT_UNPIN_TABLE;
++ op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++void xen_set_ldt(const void *ptr, unsigned int ents)
++{
++ struct mmuext_op op;
++ op.cmd = MMUEXT_SET_LDT;
++ op.arg1.linear_addr = (unsigned long)ptr;
++ op.arg2.nr_ents = ents;
++ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++}
++
++/* Protected by balloon_lock. */
++#define MAX_CONTIG_ORDER 9 /* 2MB */
++static unsigned long discontig_frames[1<<MAX_CONTIG_ORDER];
++static unsigned long limited_frames[1<<MAX_CONTIG_ORDER];
++static multicall_entry_t cr_mcl[1<<MAX_CONTIG_ORDER];
++
++/* Ensure multi-page extents are contiguous in machine memory. */
++int xen_create_contiguous_region(
++ unsigned long vstart, unsigned int order, unsigned int address_bits)
++{
++ unsigned long *in_frames = discontig_frames, out_frame;
++ unsigned long frame, flags;
++ unsigned int i;
++ int rc, success;
++ struct xen_memory_exchange exchange = {
++ .in = {
++ .nr_extents = 1UL << order,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ },
++ .out = {
++ .nr_extents = 1,
++ .extent_order = order,
++ .address_bits = address_bits,
++ .domid = DOMID_SELF
++ }
++ };
++
++ /*
++ * Currently an auto-translated guest will not perform I/O, nor will
++ * it require PAE page directories below 4GB. Therefore any calls to
++ * this function are redundant and can be ignored.
++ */
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return 0;
++
++ if (unlikely(order > MAX_CONTIG_ORDER))
++ return -ENOMEM;
++
++ set_xen_guest_handle(exchange.in.extent_start, in_frames);
++ set_xen_guest_handle(exchange.out.extent_start, &out_frame);
++
++ scrub_pages((void *)vstart, 1 << order);
++
++ balloon_lock(flags);
++
++ /* 1. Zap current PTEs, remembering MFNs. */
++ for (i = 0; i < (1U<<order); i++) {
++ in_frames[i] = pfn_to_mfn((__pa(vstart) >> PAGE_SHIFT) + i);
++ MULTI_update_va_mapping(cr_mcl + i, vstart + (i*PAGE_SIZE),
++ __pte_ma(0), 0);
++ set_phys_to_machine((__pa(vstart)>>PAGE_SHIFT)+i,
++ INVALID_P2M_ENTRY);
++ }
++ if (HYPERVISOR_multicall_check(cr_mcl, i, NULL))
++ BUG();
++
++ /* 2. Get a new contiguous memory extent. */
++ out_frame = __pa(vstart) >> PAGE_SHIFT;
++ rc = HYPERVISOR_memory_op(XENMEM_exchange, &exchange);
++ success = (exchange.nr_exchanged == (1UL << order));
++ BUG_ON(!success && ((exchange.nr_exchanged != 0) || (rc == 0)));
++ BUG_ON(success && (rc != 0));
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ /* Compatibility when XENMEM_exchange is unsupported. */
++ if (HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &exchange.in) != (1UL << order))
++ BUG();
++ success = (HYPERVISOR_memory_op(XENMEM_populate_physmap,
++ &exchange.out) == 1);
++ if (!success) {
++ /* Couldn't get special memory: fall back to normal. */
++ for (i = 0; i < (1U<<order); i++)
++ in_frames[i] = (__pa(vstart)>>PAGE_SHIFT) + i;
++ if (HYPERVISOR_memory_op(XENMEM_populate_physmap,
++ &exchange.in) != (1UL<<order))
++ BUG();
++ }
++ }
++#endif
++
++ /* 3. Map the new extent in place of old pages. */
++ for (i = 0; i < (1U<<order); i++) {
++ frame = success ? (out_frame + i) : in_frames[i];
++ MULTI_update_va_mapping(cr_mcl + i, vstart + (i*PAGE_SIZE),
++ pfn_pte_ma(frame, PAGE_KERNEL), 0);
++ set_phys_to_machine((__pa(vstart)>>PAGE_SHIFT)+i, frame);
++ }
++
++ cr_mcl[i - 1].args[MULTI_UVMFLAGS_INDEX] = order
++ ? UVMF_TLB_FLUSH|UVMF_ALL
++ : UVMF_INVLPG|UVMF_ALL;
++ if (HYPERVISOR_multicall_check(cr_mcl, i, NULL))
++ BUG();
++
++ balloon_unlock(flags);
++
++ return success ? 0 : -ENOMEM;
++}
++EXPORT_SYMBOL_GPL(xen_create_contiguous_region);
++
++void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order)
++{
++ unsigned long *out_frames = discontig_frames, in_frame;
++ unsigned long frame, flags;
++ unsigned int i;
++ int rc, success;
++ struct xen_memory_exchange exchange = {
++ .in = {
++ .nr_extents = 1,
++ .extent_order = order,
++ .domid = DOMID_SELF
++ },
++ .out = {
++ .nr_extents = 1UL << order,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ }
++ };
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return;
++
++ if (unlikely(order > MAX_CONTIG_ORDER))
++ return;
++
++ set_xen_guest_handle(exchange.in.extent_start, &in_frame);
++ set_xen_guest_handle(exchange.out.extent_start, out_frames);
++
++ scrub_pages((void *)vstart, 1 << order);
++
++ balloon_lock(flags);
++
++ /* 1. Find start MFN of contiguous extent. */
++ in_frame = pfn_to_mfn(__pa(vstart) >> PAGE_SHIFT);
++
++ /* 2. Zap current PTEs. */
++ for (i = 0; i < (1U<<order); i++) {
++ MULTI_update_va_mapping(cr_mcl + i, vstart + (i*PAGE_SIZE),
++ __pte_ma(0), 0);
++ set_phys_to_machine((__pa(vstart)>>PAGE_SHIFT)+i,
++ INVALID_P2M_ENTRY);
++ out_frames[i] = (__pa(vstart) >> PAGE_SHIFT) + i;
++ }
++ if (HYPERVISOR_multicall_check(cr_mcl, i, NULL))
++ BUG();
++
++ /* 3. Do the exchange for non-contiguous MFNs. */
++ rc = HYPERVISOR_memory_op(XENMEM_exchange, &exchange);
++ success = (exchange.nr_exchanged == 1);
++ BUG_ON(!success && ((exchange.nr_exchanged != 0) || (rc == 0)));
++ BUG_ON(success && (rc != 0));
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ /* Compatibility when XENMEM_exchange is unsupported. */
++ if (HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &exchange.in) != 1)
++ BUG();
++ if (HYPERVISOR_memory_op(XENMEM_populate_physmap,
++ &exchange.out) != (1UL << order))
++ BUG();
++ success = 1;
++ }
++#endif
++
++ /* 4. Map new pages in place of old pages. */
++ for (i = 0; i < (1U<<order); i++) {
++ frame = success ? out_frames[i] : (in_frame + i);
++ MULTI_update_va_mapping(cr_mcl + i, vstart + (i*PAGE_SIZE),
++ pfn_pte_ma(frame, PAGE_KERNEL), 0);
++ set_phys_to_machine((__pa(vstart)>>PAGE_SHIFT)+i, frame);
++ }
++
++ cr_mcl[i - 1].args[MULTI_UVMFLAGS_INDEX] = order
++ ? UVMF_TLB_FLUSH|UVMF_ALL
++ : UVMF_INVLPG|UVMF_ALL;
++ if (HYPERVISOR_multicall_check(cr_mcl, i, NULL))
++ BUG();
++
++ balloon_unlock(flags);
++}
++EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region);
++
++int xen_limit_pages_to_max_mfn(
++ struct page *pages, unsigned int order, unsigned int address_bits)
++{
++ unsigned long flags, frame;
++ unsigned long *in_frames = discontig_frames, *out_frames = limited_frames;
++ struct page *page;
++ unsigned int i, n, nr_mcl;
++ int rc, success;
++ DECLARE_BITMAP(limit_map, 1 << MAX_CONTIG_ORDER);
++
++ struct xen_memory_exchange exchange = {
++ .in = {
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ },
++ .out = {
++ .extent_order = 0,
++ .address_bits = address_bits,
++ .domid = DOMID_SELF
++ }
++ };
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return 0;
++
++ if (unlikely(order > MAX_CONTIG_ORDER))
++ return -ENOMEM;
++
++ bitmap_zero(limit_map, 1U << order);
++ set_xen_guest_handle(exchange.in.extent_start, in_frames);
++ set_xen_guest_handle(exchange.out.extent_start, out_frames);
++
++ /* 0. Scrub the pages. */
++ for (i = 0, n = 0; i < 1U<<order ; i++) {
++ page = &pages[i];
++ if (!(pfn_to_mfn(page_to_pfn(page)) >> (address_bits - PAGE_SHIFT)))
++ continue;
++ __set_bit(i, limit_map);
++
++ if (!PageHighMem(page))
++ scrub_pages(page_address(page), 1);
++#ifdef CONFIG_XEN_SCRUB_PAGES
++ else {
++ scrub_pages(kmap(page), 1);
++ kunmap(page);
++ ++n;
++ }
++#endif
++ }
++ if (bitmap_empty(limit_map, 1U << order))
++ return 0;
++
++ if (n)
++ kmap_flush_unused();
++
++ balloon_lock(flags);
++
++ /* 1. Zap current PTEs (if any), remembering MFNs. */
++ for (i = 0, n = 0, nr_mcl = 0; i < (1U<<order); i++) {
++ if(!test_bit(i, limit_map))
++ continue;
++ page = &pages[i];
++
++ out_frames[n] = page_to_pfn(page);
++ in_frames[n] = pfn_to_mfn(out_frames[n]);
++
++ if (!PageHighMem(page))
++ MULTI_update_va_mapping(cr_mcl + nr_mcl++,
++ (unsigned long)page_address(page),
++ __pte_ma(0), 0);
++
++ set_phys_to_machine(out_frames[n], INVALID_P2M_ENTRY);
++ ++n;
++ }
++ if (nr_mcl && HYPERVISOR_multicall_check(cr_mcl, nr_mcl, NULL))
++ BUG();
++
++ /* 2. Get new memory below the required limit. */
++ exchange.in.nr_extents = n;
++ exchange.out.nr_extents = n;
++ rc = HYPERVISOR_memory_op(XENMEM_exchange, &exchange);
++ success = (exchange.nr_exchanged == n);
++ BUG_ON(!success && ((exchange.nr_exchanged != 0) || (rc == 0)));
++ BUG_ON(success && (rc != 0));
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ /* Compatibility when XENMEM_exchange is unsupported. */
++ if (HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &exchange.in) != n)
++ BUG();
++ if (HYPERVISOR_memory_op(XENMEM_populate_physmap,
++ &exchange.out) != n)
++ BUG();
++ success = 1;
++ }
++#endif
++
++ /* 3. Map the new pages in place of old pages. */
++ for (i = 0, n = 0, nr_mcl = 0; i < (1U<<order); i++) {
++ if(!test_bit(i, limit_map))
++ continue;
++ page = &pages[i];
++
++ frame = success ? out_frames[n] : in_frames[n];
++
++ if (!PageHighMem(page))
++ MULTI_update_va_mapping(cr_mcl + nr_mcl++,
++ (unsigned long)page_address(page),
++ pfn_pte_ma(frame, PAGE_KERNEL), 0);
++
++ set_phys_to_machine(page_to_pfn(page), frame);
++ ++n;
++ }
++ if (nr_mcl) {
++ cr_mcl[nr_mcl - 1].args[MULTI_UVMFLAGS_INDEX] = order
++ ? UVMF_TLB_FLUSH|UVMF_ALL
++ : UVMF_INVLPG|UVMF_ALL;
++ if (HYPERVISOR_multicall_check(cr_mcl, nr_mcl, NULL))
++ BUG();
++ }
++
++ balloon_unlock(flags);
++
++ return success ? 0 : -ENOMEM;
++}
++EXPORT_SYMBOL_GPL(xen_limit_pages_to_max_mfn);
++
++#ifdef __i386__
++int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b)
++{
++ __u32 *lp = (__u32 *)((char *)ldt + entry * 8);
++ maddr_t mach_lp = arbitrary_virt_to_machine(lp);
++ return HYPERVISOR_update_descriptor(
++ mach_lp, (u64)entry_a | ((u64)entry_b<<32));
++}
++#endif
++
++#define MAX_BATCHED_FULL_PTES 32
++
++int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
++ unsigned long addr, unsigned long end, pgprot_t newprot)
++{
++ int rc = 0, i = 0;
++ mmu_update_t u[MAX_BATCHED_FULL_PTES];
++ pte_t *pte;
++ spinlock_t *ptl;
++
++ if (!xen_feature(XENFEAT_mmu_pt_update_preserve_ad))
++ return 0;
++
++ pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
++ do {
++ if (pte_present(*pte)) {
++ u[i].ptr = (__pmd_val(*pmd) & PHYSICAL_PAGE_MASK)
++ | ((unsigned long)pte & ~PAGE_MASK)
++ | MMU_PT_UPDATE_PRESERVE_AD;
++ u[i].val = __pte_val(pte_modify(*pte, newprot));
++ if (++i == MAX_BATCHED_FULL_PTES) {
++ if ((rc = HYPERVISOR_mmu_update(
++ &u[0], i, NULL, DOMID_SELF)) != 0)
++ break;
++ i = 0;
++ }
++ }
++ } while (pte++, addr += PAGE_SIZE, addr != end);
++ if (i)
++ rc = HYPERVISOR_mmu_update( &u[0], i, NULL, DOMID_SELF);
++ pte_unmap_unlock(pte - 1, ptl);
++ BUG_ON(rc && rc != -ENOSYS);
++ return !rc;
++}
+Index: head-2008-11-25/arch/x86/mm/init_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/init_32-xen.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,840 @@
++/*
++ * linux/arch/i386/mm/init.c
++ *
++ * Copyright (C) 1995 Linus Torvalds
++ *
++ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
++ */
++
++#include <linux/module.h>
++#include <linux/signal.h>
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/types.h>
++#include <linux/ptrace.h>
++#include <linux/mman.h>
++#include <linux/mm.h>
++#include <linux/hugetlb.h>
++#include <linux/swap.h>
++#include <linux/smp.h>
++#include <linux/init.h>
++#include <linux/highmem.h>
++#include <linux/pagemap.h>
++#include <linux/poison.h>
++#include <linux/bootmem.h>
++#include <linux/slab.h>
++#include <linux/proc_fs.h>
++#include <linux/efi.h>
++#include <linux/memory_hotplug.h>
++#include <linux/initrd.h>
++#include <linux/cpumask.h>
++#include <linux/dma-mapping.h>
++#include <linux/scatterlist.h>
++
++#include <asm/processor.h>
++#include <asm/system.h>
++#include <asm/uaccess.h>
++#include <asm/pgtable.h>
++#include <asm/dma.h>
++#include <asm/fixmap.h>
++#include <asm/e820.h>
++#include <asm/apic.h>
++#include <asm/tlb.h>
++#include <asm/tlbflush.h>
++#include <asm/sections.h>
++#include <asm/hypervisor.h>
++#include <asm/swiotlb.h>
++
++unsigned int __VMALLOC_RESERVE = 128 << 20;
++
++DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
++unsigned long highstart_pfn, highend_pfn;
++
++static int noinline do_test_wp_bit(void);
++
++/*
++ * Creates a middle page table and puts a pointer to it in the
++ * given global directory entry. This only returns the gd entry
++ * in non-PAE compilation mode, since the middle layer is folded.
++ */
++static pmd_t * __init one_md_table_init(pgd_t *pgd)
++{
++ pud_t *pud;
++ pmd_t *pmd_table;
++
++#ifdef CONFIG_X86_PAE
++ pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
++ make_lowmem_page_readonly(pmd_table, XENFEAT_writable_page_tables);
++ set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
++ pud = pud_offset(pgd, 0);
++ if (pmd_table != pmd_offset(pud, 0))
++ BUG();
++#else
++ pud = pud_offset(pgd, 0);
++ pmd_table = pmd_offset(pud, 0);
++#endif
++
++ return pmd_table;
++}
++
++/*
++ * Create a page table and place a pointer to it in a middle page
++ * directory entry.
++ */
++static pte_t * __init one_page_table_init(pmd_t *pmd)
++{
++ if (pmd_none(*pmd)) {
++ pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
++ make_lowmem_page_readonly(page_table,
++ XENFEAT_writable_page_tables);
++ set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
++ if (page_table != pte_offset_kernel(pmd, 0))
++ BUG();
++
++ return page_table;
++ }
++
++ return pte_offset_kernel(pmd, 0);
++}
++
++/*
++ * This function initializes a certain range of kernel virtual memory
++ * with new bootmem page tables, everywhere page tables are missing in
++ * the given range.
++ */
++
++/*
++ * NOTE: The pagetables are allocated contiguous on the physical space
++ * so we can cache the place of the first one and move around without
++ * checking the pgd every time.
++ */
++static void __init page_table_range_init (unsigned long start, unsigned long end, pgd_t *pgd_base)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ int pgd_idx, pmd_idx;
++ unsigned long vaddr;
++
++ vaddr = start;
++ pgd_idx = pgd_index(vaddr);
++ pmd_idx = pmd_index(vaddr);
++ pgd = pgd_base + pgd_idx;
++
++ for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd++, pgd_idx++) {
++ if (pgd_none(*pgd))
++ one_md_table_init(pgd);
++ pud = pud_offset(pgd, vaddr);
++ pmd = pmd_offset(pud, vaddr);
++ for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end); pmd++, pmd_idx++) {
++ if (vaddr < hypervisor_virt_start && pmd_none(*pmd))
++ one_page_table_init(pmd);
++
++ vaddr += PMD_SIZE;
++ }
++ pmd_idx = 0;
++ }
++}
++
++static inline int is_kernel_text(unsigned long addr)
++{
++ if (addr >= PAGE_OFFSET && addr <= (unsigned long)__init_end)
++ return 1;
++ return 0;
++}
++
++/*
++ * This maps the physical memory to kernel virtual address space, a total
++ * of max_low_pfn pages, by creating page tables starting from address
++ * PAGE_OFFSET.
++ */
++static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
++{
++ unsigned long pfn;
++ pgd_t *pgd;
++ pmd_t *pmd;
++ pte_t *pte;
++ int pgd_idx, pmd_idx, pte_ofs;
++
++ unsigned long max_ram_pfn = xen_start_info->nr_pages;
++ if (max_ram_pfn > max_low_pfn)
++ max_ram_pfn = max_low_pfn;
++
++ pgd_idx = pgd_index(PAGE_OFFSET);
++ pgd = pgd_base + pgd_idx;
++ pfn = 0;
++ pmd_idx = pmd_index(PAGE_OFFSET);
++ pte_ofs = pte_index(PAGE_OFFSET);
++
++ for (; pgd_idx < PTRS_PER_PGD; pgd++, pgd_idx++) {
++#ifdef CONFIG_XEN
++ /*
++ * Native linux hasn't PAE-paging enabled yet at this
++ * point. When running as xen domain we are in PAE
++ * mode already, thus we can't simply hook a empty
++ * pmd. That would kill the mappings we are currently
++ * using ...
++ */
++ pmd = pmd_offset(pud_offset(pgd, PAGE_OFFSET), PAGE_OFFSET);
++#else
++ pmd = one_md_table_init(pgd);
++#endif
++ if (pfn >= max_low_pfn)
++ continue;
++ pmd += pmd_idx;
++ for (; pmd_idx < PTRS_PER_PMD && pfn < max_low_pfn; pmd++, pmd_idx++) {
++ unsigned int address = pfn * PAGE_SIZE + PAGE_OFFSET;
++ if (address >= hypervisor_virt_start)
++ continue;
++
++ /* Map with big pages if possible, otherwise create normal page tables. */
++ if (cpu_has_pse) {
++ unsigned int address2 = (pfn + PTRS_PER_PTE - 1) * PAGE_SIZE + PAGE_OFFSET + PAGE_SIZE-1;
++
++ if (is_kernel_text(address) || is_kernel_text(address2))
++ set_pmd(pmd, pfn_pmd(pfn, PAGE_KERNEL_LARGE_EXEC));
++ else
++ set_pmd(pmd, pfn_pmd(pfn, PAGE_KERNEL_LARGE));
++ pfn += PTRS_PER_PTE;
++ } else {
++ pte = one_page_table_init(pmd);
++
++ pte += pte_ofs;
++ for (; pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn; pte++, pfn++, pte_ofs++) {
++ /* XEN: Only map initial RAM allocation. */
++ if ((pfn >= max_ram_pfn) || pte_present(*pte))
++ continue;
++ if (is_kernel_text(address))
++ set_pte(pte, pfn_pte(pfn, PAGE_KERNEL_EXEC));
++ else
++ set_pte(pte, pfn_pte(pfn, PAGE_KERNEL));
++ }
++ pte_ofs = 0;
++ }
++ }
++ pmd_idx = 0;
++ }
++}
++
++#ifndef CONFIG_XEN
++
++static inline int page_kills_ppro(unsigned long pagenr)
++{
++ if (pagenr >= 0x70000 && pagenr <= 0x7003F)
++ return 1;
++ return 0;
++}
++
++#else
++
++#define page_kills_ppro(p) 0
++
++#endif
++
++extern int is_available_memory(efi_memory_desc_t *);
++
++int page_is_ram(unsigned long pagenr)
++{
++ int i;
++ unsigned long addr, end;
++
++ if (efi_enabled) {
++ efi_memory_desc_t *md;
++ void *p;
++
++ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
++ md = p;
++ if (!is_available_memory(md))
++ continue;
++ addr = (md->phys_addr+PAGE_SIZE-1) >> PAGE_SHIFT;
++ end = (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >> PAGE_SHIFT;
++
++ if ((pagenr >= addr) && (pagenr < end))
++ return 1;
++ }
++ return 0;
++ }
++
++ for (i = 0; i < e820.nr_map; i++) {
++
++ if (e820.map[i].type != E820_RAM) /* not usable memory */
++ continue;
++ /*
++ * !!!FIXME!!! Some BIOSen report areas as RAM that
++ * are not. Notably the 640->1Mb area. We need a sanity
++ * check here.
++ */
++ addr = (e820.map[i].addr+PAGE_SIZE-1) >> PAGE_SHIFT;
++ end = (e820.map[i].addr+e820.map[i].size) >> PAGE_SHIFT;
++ if ((pagenr >= addr) && (pagenr < end))
++ return 1;
++ }
++ return 0;
++}
++
++#ifdef CONFIG_HIGHMEM
++pte_t *kmap_pte;
++pgprot_t kmap_prot;
++
++#define kmap_get_fixmap_pte(vaddr) \
++ pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), vaddr), (vaddr)), (vaddr))
++
++static void __init kmap_init(void)
++{
++ unsigned long kmap_vstart;
++
++ /* cache the first kmap pte */
++ kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN);
++ kmap_pte = kmap_get_fixmap_pte(kmap_vstart);
++
++ kmap_prot = PAGE_KERNEL;
++}
++
++static void __init permanent_kmaps_init(pgd_t *pgd_base)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++ unsigned long vaddr;
++
++ vaddr = PKMAP_BASE;
++ page_table_range_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base);
++
++ pgd = swapper_pg_dir + pgd_index(vaddr);
++ pud = pud_offset(pgd, vaddr);
++ pmd = pmd_offset(pud, vaddr);
++ pte = pte_offset_kernel(pmd, vaddr);
++ pkmap_page_table = pte;
++}
++
++static void __meminit free_new_highpage(struct page *page, int pfn)
++{
++ init_page_count(page);
++ if (pfn < xen_start_info->nr_pages)
++ __free_page(page);
++ totalhigh_pages++;
++}
++
++void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
++{
++ if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn))) {
++ ClearPageReserved(page);
++ free_new_highpage(page, pfn);
++ } else
++ SetPageReserved(page);
++}
++
++static int add_one_highpage_hotplug(struct page *page, unsigned long pfn)
++{
++ free_new_highpage(page, pfn);
++ totalram_pages++;
++#ifdef CONFIG_FLATMEM
++ max_mapnr = max(pfn, max_mapnr);
++#endif
++ num_physpages++;
++ return 0;
++}
++
++/*
++ * Not currently handling the NUMA case.
++ * Assuming single node and all memory that
++ * has been added dynamically that would be
++ * onlined here is in HIGHMEM
++ */
++void online_page(struct page *page)
++{
++ ClearPageReserved(page);
++ add_one_highpage_hotplug(page, page_to_pfn(page));
++}
++
++
++#ifdef CONFIG_NUMA
++extern void set_highmem_pages_init(int);
++#else
++static void __init set_highmem_pages_init(int bad_ppro)
++{
++ int pfn;
++ for (pfn = highstart_pfn; pfn < highend_pfn; pfn++)
++ add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
++ totalram_pages += totalhigh_pages;
++}
++#endif /* CONFIG_FLATMEM */
++
++#else
++#define kmap_init() do { } while (0)
++#define permanent_kmaps_init(pgd_base) do { } while (0)
++#define set_highmem_pages_init(bad_ppro) do { } while (0)
++#endif /* CONFIG_HIGHMEM */
++
++unsigned long long __PAGE_KERNEL = _PAGE_KERNEL;
++EXPORT_SYMBOL(__PAGE_KERNEL);
++unsigned long long __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC;
++
++#ifdef CONFIG_NUMA
++extern void __init remap_numa_kva(void);
++#else
++#define remap_numa_kva() do {} while (0)
++#endif
++
++pgd_t *swapper_pg_dir;
++
++static void __init pagetable_init (void)
++{
++ unsigned long vaddr;
++ pgd_t *pgd_base = (pgd_t *)xen_start_info->pt_base;
++
++ /* Enable PSE if available */
++ if (cpu_has_pse) {
++ set_in_cr4(X86_CR4_PSE);
++ }
++
++ /* Enable PGE if available */
++ if (cpu_has_pge) {
++ set_in_cr4(X86_CR4_PGE);
++ __PAGE_KERNEL |= _PAGE_GLOBAL;
++ __PAGE_KERNEL_EXEC |= _PAGE_GLOBAL;
++ }
++
++ kernel_physical_mapping_init(pgd_base);
++ remap_numa_kva();
++
++ /*
++ * Fixed mappings, only the page table structure has to be
++ * created - mappings will be set by set_fixmap():
++ */
++ vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
++ page_table_range_init(vaddr, hypervisor_virt_start, pgd_base);
++
++ permanent_kmaps_init(pgd_base);
++}
++
++#if defined(CONFIG_SOFTWARE_SUSPEND) || defined(CONFIG_ACPI_SLEEP)
++/*
++ * Swap suspend & friends need this for resume because things like the intel-agp
++ * driver might have split up a kernel 4MB mapping.
++ */
++char __nosavedata swsusp_pg_dir[PAGE_SIZE]
++ __attribute__ ((aligned (PAGE_SIZE)));
++
++static inline void save_pg_dir(void)
++{
++ memcpy(swsusp_pg_dir, swapper_pg_dir, PAGE_SIZE);
++}
++#else
++static inline void save_pg_dir(void)
++{
++}
++#endif
++
++void zap_low_mappings (void)
++{
++ int i;
++
++ save_pg_dir();
++
++ /*
++ * Zap initial low-memory mappings.
++ *
++ * Note that "pgd_clear()" doesn't do it for
++ * us, because pgd_clear() is a no-op on i386.
++ */
++ for (i = 0; i < USER_PTRS_PER_PGD; i++)
++#if defined(CONFIG_X86_PAE) && !defined(CONFIG_XEN)
++ set_pgd(swapper_pg_dir+i, __pgd(1 + __pa(empty_zero_page)));
++#else
++ set_pgd(swapper_pg_dir+i, __pgd(0));
++#endif
++ flush_tlb_all();
++}
++
++static int disable_nx __initdata = 0;
++u64 __supported_pte_mask __read_mostly = ~_PAGE_NX;
++EXPORT_SYMBOL(__supported_pte_mask);
++
++/*
++ * noexec = on|off
++ *
++ * Control non executable mappings.
++ *
++ * on Enable
++ * off Disable
++ */
++void __init noexec_setup(const char *str)
++{
++ if (!strncmp(str, "on",2) && cpu_has_nx) {
++ __supported_pte_mask |= _PAGE_NX;
++ disable_nx = 0;
++ } else if (!strncmp(str,"off",3)) {
++ disable_nx = 1;
++ __supported_pte_mask &= ~_PAGE_NX;
++ }
++}
++
++int nx_enabled = 0;
++#ifdef CONFIG_X86_PAE
++
++static void __init set_nx(void)
++{
++ unsigned int v[4], l, h;
++
++ if (cpu_has_pae && (cpuid_eax(0x80000000) > 0x80000001)) {
++ cpuid(0x80000001, &v[0], &v[1], &v[2], &v[3]);
++ if ((v[3] & (1 << 20)) && !disable_nx) {
++ rdmsr(MSR_EFER, l, h);
++ l |= EFER_NX;
++ wrmsr(MSR_EFER, l, h);
++ nx_enabled = 1;
++ __supported_pte_mask |= _PAGE_NX;
++ }
++ }
++}
++
++/*
++ * Enables/disables executability of a given kernel page and
++ * returns the previous setting.
++ */
++int __init set_kernel_exec(unsigned long vaddr, int enable)
++{
++ pte_t *pte;
++ int ret = 1;
++
++ if (!nx_enabled)
++ goto out;
++
++ pte = lookup_address(vaddr);
++ BUG_ON(!pte);
++
++ if (!pte_exec_kernel(*pte))
++ ret = 0;
++
++ if (enable)
++ pte->pte_high &= ~(1 << (_PAGE_BIT_NX - 32));
++ else
++ pte->pte_high |= 1 << (_PAGE_BIT_NX - 32);
++ __flush_tlb_all();
++out:
++ return ret;
++}
++
++#endif
++
++/*
++ * paging_init() sets up the page tables - note that the first 8MB are
++ * already mapped by head.S.
++ *
++ * This routines also unmaps the page at virtual kernel address 0, so
++ * that we can trap those pesky NULL-reference errors in the kernel.
++ */
++void __init paging_init(void)
++{
++ int i;
++
++#ifdef CONFIG_X86_PAE
++ set_nx();
++ if (nx_enabled)
++ printk("NX (Execute Disable) protection: active\n");
++#endif
++
++ pagetable_init();
++
++#if defined(CONFIG_X86_PAE) && !defined(CONFIG_XEN)
++ /*
++ * We will bail out later - printk doesn't work right now so
++ * the user would just see a hanging kernel.
++ * when running as xen domain we are already in PAE mode at
++ * this point.
++ */
++ if (cpu_has_pae)
++ set_in_cr4(X86_CR4_PAE);
++#endif
++ __flush_tlb_all();
++
++ kmap_init();
++
++ /* Switch to the real shared_info page, and clear the
++ * dummy page. */
++ set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info);
++ HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
++ memset(empty_zero_page, 0, sizeof(empty_zero_page));
++
++ /* Setup mapping of lower 1st MB */
++ for (i = 0; i < NR_FIX_ISAMAPS; i++)
++ if (is_initial_xendomain())
++ set_fixmap(FIX_ISAMAP_BEGIN - i, i * PAGE_SIZE);
++ else
++ __set_fixmap(FIX_ISAMAP_BEGIN - i,
++ virt_to_machine(empty_zero_page),
++ PAGE_KERNEL_RO);
++}
++
++/*
++ * Test if the WP bit works in supervisor mode. It isn't supported on 386's
++ * and also on some strange 486's (NexGen etc.). All 586+'s are OK. This
++ * used to involve black magic jumps to work around some nasty CPU bugs,
++ * but fortunately the switch to using exceptions got rid of all that.
++ */
++
++static void __init test_wp_bit(void)
++{
++ printk("Checking if this processor honours the WP bit even in supervisor mode... ");
++
++ /* Any page-aligned address will do, the test is non-destructive */
++ __set_fixmap(FIX_WP_TEST, __pa(&swapper_pg_dir), PAGE_READONLY);
++ boot_cpu_data.wp_works_ok = do_test_wp_bit();
++ clear_fixmap(FIX_WP_TEST);
++
++ if (!boot_cpu_data.wp_works_ok) {
++ printk("No.\n");
++#ifdef CONFIG_X86_WP_WORKS_OK
++ panic("This kernel doesn't support CPU's with broken WP. Recompile it for a 386!");
++#endif
++ } else {
++ printk("Ok.\n");
++ }
++}
++
++static void __init set_max_mapnr_init(void)
++{
++#ifdef CONFIG_HIGHMEM
++ num_physpages = highend_pfn;
++#else
++ num_physpages = max_low_pfn;
++#endif
++#ifdef CONFIG_FLATMEM
++ max_mapnr = num_physpages;
++#endif
++}
++
++static struct kcore_list kcore_mem, kcore_vmalloc;
++
++void __init mem_init(void)
++{
++ extern int ppro_with_ram_bug(void);
++ int codesize, reservedpages, datasize, initsize;
++ int tmp;
++ int bad_ppro;
++ unsigned long pfn;
++
++#if defined(CONFIG_SWIOTLB)
++ swiotlb_init();
++#endif
++
++#ifdef CONFIG_FLATMEM
++ if (!mem_map)
++ BUG();
++#endif
++
++ bad_ppro = ppro_with_ram_bug();
++
++#ifdef CONFIG_HIGHMEM
++ /* check that fixmap and pkmap do not overlap */
++ if (PKMAP_BASE+LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
++ printk(KERN_ERR "fixmap and kmap areas overlap - this will crash\n");
++ printk(KERN_ERR "pkstart: %lxh pkend: %lxh fixstart %lxh\n",
++ PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE, FIXADDR_START);
++ BUG();
++ }
++#endif
++
++ set_max_mapnr_init();
++
++#ifdef CONFIG_HIGHMEM
++ high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
++#else
++ high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
++#endif
++ printk("vmalloc area: %lx-%lx, maxmem %lx\n",
++ VMALLOC_START,VMALLOC_END,MAXMEM);
++ BUG_ON(VMALLOC_START > VMALLOC_END);
++
++ /* this will put all low memory onto the freelists */
++ totalram_pages += free_all_bootmem();
++ /* XEN: init and count low-mem pages outside initial allocation. */
++ for (pfn = xen_start_info->nr_pages; pfn < max_low_pfn; pfn++) {
++ ClearPageReserved(pfn_to_page(pfn));
++ init_page_count(pfn_to_page(pfn));
++ totalram_pages++;
++ }
++
++ reservedpages = 0;
++ for (tmp = 0; tmp < max_low_pfn; tmp++)
++ /*
++ * Only count reserved RAM pages
++ */
++ if (page_is_ram(tmp) && PageReserved(pfn_to_page(tmp)))
++ reservedpages++;
++
++ set_highmem_pages_init(bad_ppro);
++
++ codesize = (unsigned long) &_etext - (unsigned long) &_text;
++ datasize = (unsigned long) &_edata - (unsigned long) &_etext;
++ initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
++
++ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
++ kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
++ VMALLOC_END-VMALLOC_START);
++
++ printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init, %ldk highmem)\n",
++ (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
++ num_physpages << (PAGE_SHIFT-10),
++ codesize >> 10,
++ reservedpages << (PAGE_SHIFT-10),
++ datasize >> 10,
++ initsize >> 10,
++ (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))
++ );
++
++#ifdef CONFIG_X86_PAE
++ if (!cpu_has_pae)
++ panic("cannot execute a PAE-enabled kernel on a PAE-less CPU!");
++#endif
++ if (boot_cpu_data.wp_works_ok < 0)
++ test_wp_bit();
++
++ /*
++ * Subtle. SMP is doing it's boot stuff late (because it has to
++ * fork idle threads) - but it also needs low mappings for the
++ * protected-mode entry to work. We zap these entries only after
++ * the WP-bit has been tested.
++ */
++#ifndef CONFIG_SMP
++ zap_low_mappings();
++#endif
++
++ set_bit(PG_pinned, &virt_to_page(init_mm.pgd)->flags);
++}
++
++/*
++ * this is for the non-NUMA, single node SMP system case.
++ * Specifically, in the case of x86, we will always add
++ * memory to the highmem for now.
++ */
++#ifdef CONFIG_MEMORY_HOTPLUG
++#ifndef CONFIG_NEED_MULTIPLE_NODES
++int arch_add_memory(int nid, u64 start, u64 size)
++{
++ struct pglist_data *pgdata = &contig_page_data;
++ struct zone *zone = pgdata->node_zones + MAX_NR_ZONES-1;
++ unsigned long start_pfn = start >> PAGE_SHIFT;
++ unsigned long nr_pages = size >> PAGE_SHIFT;
++
++ return __add_pages(zone, start_pfn, nr_pages);
++}
++
++int remove_memory(u64 start, u64 size)
++{
++ return -EINVAL;
++}
++#endif
++#endif
++
++kmem_cache_t *pgd_cache;
++kmem_cache_t *pmd_cache;
++
++void __init pgtable_cache_init(void)
++{
++ if (PTRS_PER_PMD > 1) {
++ pmd_cache = kmem_cache_create("pmd",
++ PTRS_PER_PMD*sizeof(pmd_t),
++ PTRS_PER_PMD*sizeof(pmd_t),
++ 0,
++ pmd_ctor,
++ NULL);
++ if (!pmd_cache)
++ panic("pgtable_cache_init(): cannot create pmd cache");
++ }
++ pgd_cache = kmem_cache_create("pgd",
++#ifndef CONFIG_XEN
++ PTRS_PER_PGD*sizeof(pgd_t),
++ PTRS_PER_PGD*sizeof(pgd_t),
++#else
++ PAGE_SIZE,
++ PAGE_SIZE,
++#endif
++ 0,
++ pgd_ctor,
++ PTRS_PER_PMD == 1 ? pgd_dtor : NULL);
++ if (!pgd_cache)
++ panic("pgtable_cache_init(): Cannot create pgd cache");
++}
++
++/*
++ * This function cannot be __init, since exceptions don't work in that
++ * section. Put this after the callers, so that it cannot be inlined.
++ */
++static int noinline do_test_wp_bit(void)
++{
++ char tmp_reg;
++ int flag;
++
++ __asm__ __volatile__(
++ " movb %0,%1 \n"
++ "1: movb %1,%0 \n"
++ " xorl %2,%2 \n"
++ "2: \n"
++ ".section __ex_table,\"a\"\n"
++ " .align 4 \n"
++ " .long 1b,2b \n"
++ ".previous \n"
++ :"=m" (*(char *)fix_to_virt(FIX_WP_TEST)),
++ "=q" (tmp_reg),
++ "=r" (flag)
++ :"2" (1)
++ :"memory");
++
++ return flag;
++}
++
++#ifdef CONFIG_DEBUG_RODATA
++
++void mark_rodata_ro(void)
++{
++ unsigned long addr = (unsigned long)__start_rodata;
++
++ for (; addr < (unsigned long)__end_rodata; addr += PAGE_SIZE)
++ change_page_attr(virt_to_page(addr), 1, PAGE_KERNEL_RO);
++
++ printk("Write protecting the kernel read-only data: %uk\n",
++ (__end_rodata - __start_rodata) >> 10);
++
++ /*
++ * change_page_attr() requires a global_flush_tlb() call after it.
++ * We do this after the printk so that if something went wrong in the
++ * change, the printk gets out at least to give a better debug hint
++ * of who is the culprit.
++ */
++ global_flush_tlb();
++}
++#endif
++
++void free_init_pages(char *what, unsigned long begin, unsigned long end)
++{
++ unsigned long addr;
++
++ for (addr = begin; addr < end; addr += PAGE_SIZE) {
++ ClearPageReserved(virt_to_page(addr));
++ init_page_count(virt_to_page(addr));
++ memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
++ free_page(addr);
++ totalram_pages++;
++ }
++ printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
++}
++
++void free_initmem(void)
++{
++ free_init_pages("unused kernel memory",
++ (unsigned long)(&__init_begin),
++ (unsigned long)(&__init_end));
++}
++
++#ifdef CONFIG_BLK_DEV_INITRD
++void free_initrd_mem(unsigned long start, unsigned long end)
++{
++ free_init_pages("initrd memory", start, end);
++}
++#endif
++
+Index: head-2008-11-25/arch/x86/mm/ioremap_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/ioremap_32-xen.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,443 @@
++/*
++ * arch/i386/mm/ioremap.c
++ *
++ * Re-map IO memory to kernel address space so that we can access it.
++ * This is needed for high PCI addresses that aren't mapped in the
++ * 640k-1MB IO memory area on PC's
++ *
++ * (C) Copyright 1995 1996 Linus Torvalds
++ */
++
++#include <linux/vmalloc.h>
++#include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/module.h>
++#include <asm/io.h>
++#include <asm/fixmap.h>
++#include <asm/cacheflush.h>
++#include <asm/tlbflush.h>
++#include <asm/pgtable.h>
++#include <asm/pgalloc.h>
++
++#define ISA_START_ADDRESS 0x0
++#define ISA_END_ADDRESS 0x100000
++
++static int direct_remap_area_pte_fn(pte_t *pte,
++ struct page *pmd_page,
++ unsigned long address,
++ void *data)
++{
++ mmu_update_t **v = (mmu_update_t **)data;
++
++ BUG_ON(!pte_none(*pte));
++
++ (*v)->ptr = ((u64)pfn_to_mfn(page_to_pfn(pmd_page)) <<
++ PAGE_SHIFT) | ((unsigned long)pte & ~PAGE_MASK);
++ (*v)++;
++
++ return 0;
++}
++
++static int __direct_remap_pfn_range(struct mm_struct *mm,
++ unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid)
++{
++ int rc;
++ unsigned long i, start_address;
++ mmu_update_t *u, *v, *w;
++
++ u = v = w = (mmu_update_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
++ if (u == NULL)
++ return -ENOMEM;
++
++ start_address = address;
++
++ flush_cache_all();
++
++ for (i = 0; i < size; i += PAGE_SIZE) {
++ if ((v - u) == (PAGE_SIZE / sizeof(mmu_update_t))) {
++ /* Flush a full batch after filling in the PTE ptrs. */
++ rc = apply_to_page_range(mm, start_address,
++ address - start_address,
++ direct_remap_area_pte_fn, &w);
++ if (rc)
++ goto out;
++ rc = -EFAULT;
++ if (HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0)
++ goto out;
++ v = w = u;
++ start_address = address;
++ }
++
++ /*
++ * Fill in the machine address: PTE ptr is done later by
++ * apply_to_page_range().
++ */
++ v->val = __pte_val(pfn_pte_ma(mfn, prot)) | _PAGE_IO;
++
++ mfn++;
++ address += PAGE_SIZE;
++ v++;
++ }
++
++ if (v != u) {
++ /* Final batch. */
++ rc = apply_to_page_range(mm, start_address,
++ address - start_address,
++ direct_remap_area_pte_fn, &w);
++ if (rc)
++ goto out;
++ rc = -EFAULT;
++ if (unlikely(HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0))
++ goto out;
++ }
++
++ rc = 0;
++
++ out:
++ flush_tlb_all();
++
++ free_page((unsigned long)u);
++
++ return rc;
++}
++
++int direct_remap_pfn_range(struct vm_area_struct *vma,
++ unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid)
++{
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return remap_pfn_range(vma, address, mfn, size, prot);
++
++ if (domid == DOMID_SELF)
++ return -EINVAL;
++
++ vma->vm_flags |= VM_IO | VM_RESERVED;
++
++ vma->vm_mm->context.has_foreign_mappings = 1;
++
++ return __direct_remap_pfn_range(
++ vma->vm_mm, address, mfn, size, prot, domid);
++}
++EXPORT_SYMBOL(direct_remap_pfn_range);
++
++int direct_kernel_remap_pfn_range(unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid)
++{
++ return __direct_remap_pfn_range(
++ &init_mm, address, mfn, size, prot, domid);
++}
++EXPORT_SYMBOL(direct_kernel_remap_pfn_range);
++
++static int lookup_pte_fn(
++ pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
++{
++ uint64_t *ptep = (uint64_t *)data;
++ if (ptep)
++ *ptep = ((uint64_t)pfn_to_mfn(page_to_pfn(pmd_page)) <<
++ PAGE_SHIFT) | ((unsigned long)pte & ~PAGE_MASK);
++ return 0;
++}
++
++int create_lookup_pte_addr(struct mm_struct *mm,
++ unsigned long address,
++ uint64_t *ptep)
++{
++ return apply_to_page_range(mm, address, PAGE_SIZE,
++ lookup_pte_fn, ptep);
++}
++
++EXPORT_SYMBOL(create_lookup_pte_addr);
++
++static int noop_fn(
++ pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
++{
++ return 0;
++}
++
++int touch_pte_range(struct mm_struct *mm,
++ unsigned long address,
++ unsigned long size)
++{
++ return apply_to_page_range(mm, address, size, noop_fn, NULL);
++}
++
++EXPORT_SYMBOL(touch_pte_range);
++
++/*
++ * Does @address reside within a non-highmem page that is local to this virtual
++ * machine (i.e., not an I/O page, nor a memory page belonging to another VM).
++ * See the comment that accompanies mfn_to_local_pfn() in page.h to understand
++ * why this works.
++ */
++static inline int is_local_lowmem(unsigned long address)
++{
++ extern unsigned long max_low_pfn;
++ return (mfn_to_local_pfn(address >> PAGE_SHIFT) < max_low_pfn);
++}
++
++/*
++ * Generic mapping function (not visible outside):
++ */
++
++/*
++ * Remap an arbitrary physical address space into the kernel virtual
++ * address space. Needed when the kernel wants to access high addresses
++ * directly.
++ *
++ * NOTE! We need to allow non-page-aligned mappings too: we will obviously
++ * have to convert them into an offset in a page-aligned mapping, but the
++ * caller shouldn't need to know that small detail.
++ */
++void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
++{
++ void __iomem * addr;
++ struct vm_struct * area;
++ unsigned long offset, last_addr;
++ domid_t domid = DOMID_IO;
++
++ /* Don't allow wraparound or zero size */
++ last_addr = phys_addr + size - 1;
++ if (!size || last_addr < phys_addr)
++ return NULL;
++
++ /*
++ * Don't remap the low PCI/ISA area, it's always mapped..
++ */
++ if (is_initial_xendomain() &&
++ phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS)
++ return (void __iomem *) isa_bus_to_virt(phys_addr);
++
++ /*
++ * Don't allow anybody to remap normal RAM that we're using..
++ */
++ if (is_local_lowmem(phys_addr)) {
++ char *t_addr, *t_end;
++ struct page *page;
++
++ t_addr = bus_to_virt(phys_addr);
++ t_end = t_addr + (size - 1);
++
++ for(page = virt_to_page(t_addr); page <= virt_to_page(t_end); page++)
++ if(!PageReserved(page))
++ return NULL;
++
++ domid = DOMID_SELF;
++ }
++
++ /*
++ * Mappings have to be page-aligned
++ */
++ offset = phys_addr & ~PAGE_MASK;
++ phys_addr &= PAGE_MASK;
++ size = PAGE_ALIGN(last_addr+1) - phys_addr;
++
++ /*
++ * Ok, go for it..
++ */
++ area = get_vm_area(size, VM_IOREMAP | (flags << 20));
++ if (!area)
++ return NULL;
++ area->phys_addr = phys_addr;
++ addr = (void __iomem *) area->addr;
++ flags |= _KERNPG_TABLE;
++ if (__direct_remap_pfn_range(&init_mm, (unsigned long)addr,
++ phys_addr>>PAGE_SHIFT,
++ size, __pgprot(flags), domid)) {
++ vunmap((void __force *) addr);
++ return NULL;
++ }
++ return (void __iomem *) (offset + (char __iomem *)addr);
++}
++EXPORT_SYMBOL(__ioremap);
++
++/**
++ * ioremap_nocache - map bus memory into CPU space
++ * @offset: bus address of the memory
++ * @size: size of the resource to map
++ *
++ * ioremap_nocache performs a platform specific sequence of operations to
++ * make bus memory CPU accessible via the readb/readw/readl/writeb/
++ * writew/writel functions and the other mmio helpers. The returned
++ * address is not guaranteed to be usable directly as a virtual
++ * address.
++ *
++ * This version of ioremap ensures that the memory is marked uncachable
++ * on the CPU as well as honouring existing caching rules from things like
++ * the PCI bus. Note that there are other caches and buffers on many
++ * busses. In particular driver authors should read up on PCI writes
++ *
++ * It's useful if some control registers are in such an area and
++ * write combining or read caching is not desirable:
++ *
++ * Must be freed with iounmap.
++ */
++
++void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
++{
++ unsigned long last_addr;
++ void __iomem *p = __ioremap(phys_addr, size, _PAGE_PCD);
++ if (!p)
++ return p;
++
++ /* Guaranteed to be > phys_addr, as per __ioremap() */
++ last_addr = phys_addr + size - 1;
++
++ if (is_local_lowmem(last_addr)) {
++ struct page *ppage = virt_to_page(bus_to_virt(phys_addr));
++ unsigned long npages;
++
++ phys_addr &= PAGE_MASK;
++
++ /* This might overflow and become zero.. */
++ last_addr = PAGE_ALIGN(last_addr);
++
++ /* .. but that's ok, because modulo-2**n arithmetic will make
++ * the page-aligned "last - first" come out right.
++ */
++ npages = (last_addr - phys_addr) >> PAGE_SHIFT;
++
++ if (change_page_attr(ppage, npages, PAGE_KERNEL_NOCACHE) < 0) {
++ iounmap(p);
++ p = NULL;
++ }
++ global_flush_tlb();
++ }
++
++ return p;
++}
++EXPORT_SYMBOL(ioremap_nocache);
++
++/**
++ * iounmap - Free a IO remapping
++ * @addr: virtual address from ioremap_*
++ *
++ * Caller must ensure there is only one unmapping for the same pointer.
++ */
++void iounmap(volatile void __iomem *addr)
++{
++ struct vm_struct *p, *o;
++
++ if ((void __force *)addr <= high_memory)
++ return;
++
++ /*
++ * __ioremap special-cases the PCI/ISA range by not instantiating a
++ * vm_area and by simply returning an address into the kernel mapping
++ * of ISA space. So handle that here.
++ */
++ if ((unsigned long) addr >= fix_to_virt(FIX_ISAMAP_BEGIN))
++ return;
++
++ addr = (volatile void __iomem *)(PAGE_MASK & (unsigned long __force)addr);
++
++ /* Use the vm area unlocked, assuming the caller
++ ensures there isn't another iounmap for the same address
++ in parallel. Reuse of the virtual address is prevented by
++ leaving it in the global lists until we're done with it.
++ cpa takes care of the direct mappings. */
++ read_lock(&vmlist_lock);
++ for (p = vmlist; p; p = p->next) {
++ if (p->addr == addr)
++ break;
++ }
++ read_unlock(&vmlist_lock);
++
++ if (!p) {
++ printk("iounmap: bad address %p\n", addr);
++ dump_stack();
++ return;
++ }
++
++ /* Reset the direct mapping. Can block */
++ if ((p->flags >> 20) && is_local_lowmem(p->phys_addr)) {
++ /* p->size includes the guard page, but cpa doesn't like that */
++ change_page_attr(virt_to_page(bus_to_virt(p->phys_addr)),
++ (p->size - PAGE_SIZE) >> PAGE_SHIFT,
++ PAGE_KERNEL);
++ global_flush_tlb();
++ }
++
++ /* Finally remove it */
++ o = remove_vm_area((void *)addr);
++ BUG_ON(p != o || o == NULL);
++ kfree(p);
++}
++EXPORT_SYMBOL(iounmap);
++
++void __init *bt_ioremap(unsigned long phys_addr, unsigned long size)
++{
++ unsigned long offset, last_addr;
++ unsigned int nrpages;
++ enum fixed_addresses idx;
++
++ /* Don't allow wraparound or zero size */
++ last_addr = phys_addr + size - 1;
++ if (!size || last_addr < phys_addr)
++ return NULL;
++
++ /*
++ * Don't remap the low PCI/ISA area, it's always mapped..
++ */
++ if (is_initial_xendomain() &&
++ phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS)
++ return isa_bus_to_virt(phys_addr);
++
++ /*
++ * Mappings have to be page-aligned
++ */
++ offset = phys_addr & ~PAGE_MASK;
++ phys_addr &= PAGE_MASK;
++ size = PAGE_ALIGN(last_addr) - phys_addr;
++
++ /*
++ * Mappings have to fit in the FIX_BTMAP area.
++ */
++ nrpages = size >> PAGE_SHIFT;
++ if (nrpages > NR_FIX_BTMAPS)
++ return NULL;
++
++ /*
++ * Ok, go for it..
++ */
++ idx = FIX_BTMAP_BEGIN;
++ while (nrpages > 0) {
++ set_fixmap(idx, phys_addr);
++ phys_addr += PAGE_SIZE;
++ --idx;
++ --nrpages;
++ }
++ return (void*) (offset + fix_to_virt(FIX_BTMAP_BEGIN));
++}
++
++void __init bt_iounmap(void *addr, unsigned long size)
++{
++ unsigned long virt_addr;
++ unsigned long offset;
++ unsigned int nrpages;
++ enum fixed_addresses idx;
++
++ virt_addr = (unsigned long)addr;
++ if (virt_addr < fix_to_virt(FIX_BTMAP_BEGIN))
++ return;
++ if (virt_addr >= fix_to_virt(FIX_ISAMAP_BEGIN))
++ return;
++ offset = virt_addr & ~PAGE_MASK;
++ nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
++
++ idx = FIX_BTMAP_BEGIN;
++ while (nrpages > 0) {
++ clear_fixmap(idx);
++ --idx;
++ --nrpages;
++ }
++}
+Index: head-2008-11-25/arch/x86/mm/pgtable_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/pgtable_32-xen.c 2007-10-09 11:48:25.000000000 +0200
+@@ -0,0 +1,725 @@
++/*
++ * linux/arch/i386/mm/pgtable.c
++ */
++
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/mm.h>
++#include <linux/swap.h>
++#include <linux/smp.h>
++#include <linux/highmem.h>
++#include <linux/slab.h>
++#include <linux/pagemap.h>
++#include <linux/spinlock.h>
++#include <linux/module.h>
++
++#include <asm/system.h>
++#include <asm/pgtable.h>
++#include <asm/pgalloc.h>
++#include <asm/fixmap.h>
++#include <asm/e820.h>
++#include <asm/tlb.h>
++#include <asm/tlbflush.h>
++#include <asm/io.h>
++#include <asm/mmu_context.h>
++
++#include <xen/features.h>
++#include <asm/hypervisor.h>
++
++static void pgd_test_and_unpin(pgd_t *pgd);
++
++void show_mem(void)
++{
++ int total = 0, reserved = 0;
++ int shared = 0, cached = 0;
++ int highmem = 0;
++ struct page *page;
++ pg_data_t *pgdat;
++ unsigned long i;
++ unsigned long flags;
++
++ printk(KERN_INFO "Mem-info:\n");
++ show_free_areas();
++ printk(KERN_INFO "Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
++ for_each_online_pgdat(pgdat) {
++ pgdat_resize_lock(pgdat, &flags);
++ for (i = 0; i < pgdat->node_spanned_pages; ++i) {
++ page = pgdat_page_nr(pgdat, i);
++ total++;
++ if (PageHighMem(page))
++ highmem++;
++ if (PageReserved(page))
++ reserved++;
++ else if (PageSwapCache(page))
++ cached++;
++ else if (page_count(page))
++ shared += page_count(page) - 1;
++ }
++ pgdat_resize_unlock(pgdat, &flags);
++ }
++ printk(KERN_INFO "%d pages of RAM\n", total);
++ printk(KERN_INFO "%d pages of HIGHMEM\n", highmem);
++ printk(KERN_INFO "%d reserved pages\n", reserved);
++ printk(KERN_INFO "%d pages shared\n", shared);
++ printk(KERN_INFO "%d pages swap cached\n", cached);
++
++ printk(KERN_INFO "%lu pages dirty\n", global_page_state(NR_FILE_DIRTY));
++ printk(KERN_INFO "%lu pages writeback\n",
++ global_page_state(NR_WRITEBACK));
++ printk(KERN_INFO "%lu pages mapped\n", global_page_state(NR_FILE_MAPPED));
++ printk(KERN_INFO "%lu pages slab\n", global_page_state(NR_SLAB));
++ printk(KERN_INFO "%lu pages pagetables\n",
++ global_page_state(NR_PAGETABLE));
++}
++
++/*
++ * Associate a large virtual page frame with a given physical page frame
++ * and protection flags for that frame. pfn is for the base of the page,
++ * vaddr is what the page gets mapped to - both must be properly aligned.
++ * The pmd must already be instantiated. Assumes PAE mode.
++ */
++void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++
++ if (vaddr & (PMD_SIZE-1)) { /* vaddr is misaligned */
++ printk(KERN_WARNING "set_pmd_pfn: vaddr misaligned\n");
++ return; /* BUG(); */
++ }
++ if (pfn & (PTRS_PER_PTE-1)) { /* pfn is misaligned */
++ printk(KERN_WARNING "set_pmd_pfn: pfn misaligned\n");
++ return; /* BUG(); */
++ }
++ pgd = swapper_pg_dir + pgd_index(vaddr);
++ if (pgd_none(*pgd)) {
++ printk(KERN_WARNING "set_pmd_pfn: pgd_none\n");
++ return; /* BUG(); */
++ }
++ pud = pud_offset(pgd, vaddr);
++ pmd = pmd_offset(pud, vaddr);
++ set_pmd(pmd, pfn_pmd(pfn, flags));
++ /*
++ * It's enough to flush this one mapping.
++ * (PGE mappings get flushed as well)
++ */
++ __flush_tlb_one(vaddr);
++}
++
++static int nr_fixmaps = 0;
++unsigned long hypervisor_virt_start = HYPERVISOR_VIRT_START;
++unsigned long __FIXADDR_TOP = (HYPERVISOR_VIRT_START - 2 * PAGE_SIZE);
++EXPORT_SYMBOL(__FIXADDR_TOP);
++
++void __init set_fixaddr_top(unsigned long top)
++{
++ BUG_ON(nr_fixmaps > 0);
++ hypervisor_virt_start = top;
++ __FIXADDR_TOP = hypervisor_virt_start - 2 * PAGE_SIZE;
++}
++
++void __set_fixmap (enum fixed_addresses idx, maddr_t phys, pgprot_t flags)
++{
++ unsigned long address = __fix_to_virt(idx);
++ pte_t pte;
++
++ if (idx >= __end_of_fixed_addresses) {
++ BUG();
++ return;
++ }
++ switch (idx) {
++ case FIX_WP_TEST:
++ case FIX_VDSO:
++ pte = pfn_pte(phys >> PAGE_SHIFT, flags);
++ break;
++ default:
++ pte = pfn_pte_ma(phys >> PAGE_SHIFT, flags);
++ break;
++ }
++ if (HYPERVISOR_update_va_mapping(address, pte,
++ UVMF_INVLPG|UVMF_ALL))
++ BUG();
++ nr_fixmaps++;
++}
++
++pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
++{
++ pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
++ if (pte)
++ make_lowmem_page_readonly(pte, XENFEAT_writable_page_tables);
++ return pte;
++}
++
++struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
++{
++ struct page *pte;
++
++#ifdef CONFIG_HIGHPTE
++ pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO, 0);
++#else
++ pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
++#endif
++ if (pte) {
++ SetPageForeign(pte, pte_free);
++ init_page_count(pte);
++ }
++ return pte;
++}
++
++void pte_free(struct page *pte)
++{
++ unsigned long pfn = page_to_pfn(pte);
++
++ if (!PageHighMem(pte)) {
++ unsigned long va = (unsigned long)__va(pfn << PAGE_SHIFT);
++
++ if (!pte_write(*virt_to_ptep(va)))
++ if (HYPERVISOR_update_va_mapping(
++ va, pfn_pte(pfn, PAGE_KERNEL), 0))
++ BUG();
++ } else
++ clear_bit(PG_pinned, &pte->flags);
++
++ ClearPageForeign(pte);
++ init_page_count(pte);
++
++ __free_page(pte);
++}
++
++void pmd_ctor(void *pmd, kmem_cache_t *cache, unsigned long flags)
++{
++ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
++}
++
++/*
++ * List of all pgd's needed for non-PAE so it can invalidate entries
++ * in both cached and uncached pgd's; not needed for PAE since the
++ * kernel pmd is shared. If PAE were not to share the pmd a similar
++ * tactic would be needed. This is essentially codepath-based locking
++ * against pageattr.c; it is the unique case in which a valid change
++ * of kernel pagetables can't be lazily synchronized by vmalloc faults.
++ * vmalloc faults work because attached pagetables are never freed.
++ * The locking scheme was chosen on the basis of manfred's
++ * recommendations and having no core impact whatsoever.
++ * -- wli
++ */
++DEFINE_SPINLOCK(pgd_lock);
++struct page *pgd_list;
++
++static inline void pgd_list_add(pgd_t *pgd)
++{
++ struct page *page = virt_to_page(pgd);
++ page->index = (unsigned long)pgd_list;
++ if (pgd_list)
++ set_page_private(pgd_list, (unsigned long)&page->index);
++ pgd_list = page;
++ set_page_private(page, (unsigned long)&pgd_list);
++}
++
++static inline void pgd_list_del(pgd_t *pgd)
++{
++ struct page *next, **pprev, *page = virt_to_page(pgd);
++ next = (struct page *)page->index;
++ pprev = (struct page **)page_private(page);
++ *pprev = next;
++ if (next)
++ set_page_private(next, (unsigned long)pprev);
++}
++
++void pgd_ctor(void *pgd, kmem_cache_t *cache, unsigned long unused)
++{
++ unsigned long flags;
++
++ if (PTRS_PER_PMD > 1) {
++ if (HAVE_SHARED_KERNEL_PMD)
++ clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
++ swapper_pg_dir + USER_PTRS_PER_PGD,
++ KERNEL_PGD_PTRS);
++ } else {
++ spin_lock_irqsave(&pgd_lock, flags);
++ clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
++ swapper_pg_dir + USER_PTRS_PER_PGD,
++ KERNEL_PGD_PTRS);
++ memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
++ pgd_list_add(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ }
++}
++
++/* never called when PTRS_PER_PMD > 1 */
++void pgd_dtor(void *pgd, kmem_cache_t *cache, unsigned long unused)
++{
++ unsigned long flags; /* can be called from interrupt context */
++
++ spin_lock_irqsave(&pgd_lock, flags);
++ pgd_list_del(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++
++ pgd_test_and_unpin(pgd);
++}
++
++pgd_t *pgd_alloc(struct mm_struct *mm)
++{
++ int i;
++ pgd_t *pgd = kmem_cache_alloc(pgd_cache, GFP_KERNEL);
++ pmd_t **pmd;
++ unsigned long flags;
++
++ pgd_test_and_unpin(pgd);
++
++ if (PTRS_PER_PMD == 1 || !pgd)
++ return pgd;
++
++ if (HAVE_SHARED_KERNEL_PMD) {
++ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
++ pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
++ if (!pmd)
++ goto out_oom;
++ set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
++ }
++ return pgd;
++ }
++
++ /*
++ * We can race save/restore (if we sleep during a GFP_KERNEL memory
++ * allocation). We therefore store virtual addresses of pmds as they
++ * do not change across save/restore, and poke the machine addresses
++ * into the pgdir under the pgd_lock.
++ */
++ pmd = kmalloc(PTRS_PER_PGD * sizeof(pmd_t *), GFP_KERNEL);
++ if (!pmd) {
++ kmem_cache_free(pgd_cache, pgd);
++ return NULL;
++ }
++
++ /* Allocate pmds, remember virtual addresses. */
++ for (i = 0; i < PTRS_PER_PGD; ++i) {
++ pmd[i] = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
++ if (!pmd[i])
++ goto out_oom;
++ }
++
++ spin_lock_irqsave(&pgd_lock, flags);
++
++ /* Protect against save/restore: move below 4GB under pgd_lock. */
++ if (!xen_feature(XENFEAT_pae_pgdir_above_4gb)) {
++ int rc = xen_create_contiguous_region(
++ (unsigned long)pgd, 0, 32);
++ if (rc) {
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ goto out_oom;
++ }
++ }
++
++ /* Copy kernel pmd contents and write-protect the new pmds. */
++ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
++ unsigned long v = (unsigned long)i << PGDIR_SHIFT;
++ pgd_t *kpgd = pgd_offset_k(v);
++ pud_t *kpud = pud_offset(kpgd, v);
++ pmd_t *kpmd = pmd_offset(kpud, v);
++ memcpy(pmd[i], kpmd, PAGE_SIZE);
++ make_lowmem_page_readonly(
++ pmd[i], XENFEAT_writable_page_tables);
++ }
++
++ /* It is safe to poke machine addresses of pmds under the pmd_lock. */
++ for (i = 0; i < PTRS_PER_PGD; i++)
++ set_pgd(&pgd[i], __pgd(1 + __pa(pmd[i])));
++
++ /* Ensure this pgd gets picked up and pinned on save/restore. */
++ pgd_list_add(pgd);
++
++ spin_unlock_irqrestore(&pgd_lock, flags);
++
++ kfree(pmd);
++
++ return pgd;
++
++out_oom:
++ if (HAVE_SHARED_KERNEL_PMD) {
++ for (i--; i >= 0; i--)
++ kmem_cache_free(pmd_cache,
++ (void *)__va(pgd_val(pgd[i])-1));
++ } else {
++ for (i--; i >= 0; i--)
++ kmem_cache_free(pmd_cache, pmd[i]);
++ kfree(pmd);
++ }
++ kmem_cache_free(pgd_cache, pgd);
++ return NULL;
++}
++
++void pgd_free(pgd_t *pgd)
++{
++ int i;
++
++ /*
++ * After this the pgd should not be pinned for the duration of this
++ * function's execution. We should never sleep and thus never race:
++ * 1. User pmds will not become write-protected under our feet due
++ * to a concurrent mm_pin_all().
++ * 2. The machine addresses in PGD entries will not become invalid
++ * due to a concurrent save/restore.
++ */
++ pgd_test_and_unpin(pgd);
++
++ /* in the PAE case user pgd entries are overwritten before usage */
++ if (PTRS_PER_PMD > 1) {
++ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
++ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ kmem_cache_free(pmd_cache, pmd);
++ }
++
++ if (!HAVE_SHARED_KERNEL_PMD) {
++ unsigned long flags;
++ spin_lock_irqsave(&pgd_lock, flags);
++ pgd_list_del(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++
++ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
++ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ make_lowmem_page_writable(
++ pmd, XENFEAT_writable_page_tables);
++ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
++ kmem_cache_free(pmd_cache, pmd);
++ }
++
++ if (!xen_feature(XENFEAT_pae_pgdir_above_4gb))
++ xen_destroy_contiguous_region(
++ (unsigned long)pgd, 0);
++ }
++ }
++
++ /* in the non-PAE case, free_pgtables() clears user pgd entries */
++ kmem_cache_free(pgd_cache, pgd);
++}
++
++void make_lowmem_page_readonly(void *va, unsigned int feature)
++{
++ pte_t *pte;
++ int rc;
++
++ if (xen_feature(feature))
++ return;
++
++ pte = virt_to_ptep(va);
++ rc = HYPERVISOR_update_va_mapping(
++ (unsigned long)va, pte_wrprotect(*pte), 0);
++ BUG_ON(rc);
++}
++
++void make_lowmem_page_writable(void *va, unsigned int feature)
++{
++ pte_t *pte;
++ int rc;
++
++ if (xen_feature(feature))
++ return;
++
++ pte = virt_to_ptep(va);
++ rc = HYPERVISOR_update_va_mapping(
++ (unsigned long)va, pte_mkwrite(*pte), 0);
++ BUG_ON(rc);
++}
++
++void make_page_readonly(void *va, unsigned int feature)
++{
++ pte_t *pte;
++ int rc;
++
++ if (xen_feature(feature))
++ return;
++
++ pte = virt_to_ptep(va);
++ rc = HYPERVISOR_update_va_mapping(
++ (unsigned long)va, pte_wrprotect(*pte), 0);
++ if (rc) /* fallback? */
++ xen_l1_entry_update(pte, pte_wrprotect(*pte));
++ if ((unsigned long)va >= (unsigned long)high_memory) {
++ unsigned long pfn = pte_pfn(*pte);
++#ifdef CONFIG_HIGHMEM
++ if (pfn >= highstart_pfn)
++ kmap_flush_unused(); /* flush stale writable kmaps */
++ else
++#endif
++ make_lowmem_page_readonly(
++ phys_to_virt(pfn << PAGE_SHIFT), feature);
++ }
++}
++
++void make_page_writable(void *va, unsigned int feature)
++{
++ pte_t *pte;
++ int rc;
++
++ if (xen_feature(feature))
++ return;
++
++ pte = virt_to_ptep(va);
++ rc = HYPERVISOR_update_va_mapping(
++ (unsigned long)va, pte_mkwrite(*pte), 0);
++ if (rc) /* fallback? */
++ xen_l1_entry_update(pte, pte_mkwrite(*pte));
++ if ((unsigned long)va >= (unsigned long)high_memory) {
++ unsigned long pfn = pte_pfn(*pte);
++#ifdef CONFIG_HIGHMEM
++ if (pfn < highstart_pfn)
++#endif
++ make_lowmem_page_writable(
++ phys_to_virt(pfn << PAGE_SHIFT), feature);
++ }
++}
++
++void make_pages_readonly(void *va, unsigned int nr, unsigned int feature)
++{
++ if (xen_feature(feature))
++ return;
++
++ while (nr-- != 0) {
++ make_page_readonly(va, feature);
++ va = (void *)((unsigned long)va + PAGE_SIZE);
++ }
++}
++
++void make_pages_writable(void *va, unsigned int nr, unsigned int feature)
++{
++ if (xen_feature(feature))
++ return;
++
++ while (nr-- != 0) {
++ make_page_writable(va, feature);
++ va = (void *)((unsigned long)va + PAGE_SIZE);
++ }
++}
++
++static void _pin_lock(struct mm_struct *mm, int lock) {
++ if (lock)
++ spin_lock(&mm->page_table_lock);
++#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
++ /* While mm->page_table_lock protects us against insertions and
++ * removals of higher level page table pages, it doesn't protect
++ * against updates of pte-s. Such updates, however, require the
++ * pte pages to be in consistent state (unpinned+writable or
++ * pinned+readonly). The pinning and attribute changes, however
++ * cannot be done atomically, which is why such updates must be
++ * prevented from happening concurrently.
++ * Note that no pte lock can ever elsewhere be acquired nesting
++ * with an already acquired one in the same mm, or with the mm's
++ * page_table_lock already acquired, as that would break in the
++ * non-split case (where all these are actually resolving to the
++ * one page_table_lock). Thus acquiring all of them here is not
++ * going to result in dead locks, and the order of acquires
++ * doesn't matter.
++ */
++ {
++ pgd_t *pgd = mm->pgd;
++ unsigned g;
++
++ for (g = 0; g < USER_PTRS_PER_PGD; g++, pgd++) {
++ pud_t *pud;
++ unsigned u;
++
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ pmd_t *pmd;
++ unsigned m;
++
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++ spinlock_t *ptl;
++
++ if (pmd_none(*pmd))
++ continue;
++ ptl = pte_lockptr(0, pmd);
++ if (lock)
++ spin_lock(ptl);
++ else
++ spin_unlock(ptl);
++ }
++ }
++ }
++ }
++#endif
++ if (!lock)
++ spin_unlock(&mm->page_table_lock);
++}
++#define pin_lock(mm) _pin_lock(mm, 1)
++#define pin_unlock(mm) _pin_lock(mm, 0)
++
++#define PIN_BATCH 4
++static DEFINE_PER_CPU(multicall_entry_t[PIN_BATCH], pb_mcl);
++
++static inline unsigned int pgd_walk_set_prot(struct page *page, pgprot_t flags,
++ unsigned int cpu, unsigned seq)
++{
++ unsigned long pfn = page_to_pfn(page);
++
++ if (PageHighMem(page)) {
++ if (pgprot_val(flags) & _PAGE_RW)
++ clear_bit(PG_pinned, &page->flags);
++ else
++ set_bit(PG_pinned, &page->flags);
++ } else {
++ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, flags), 0);
++ if (unlikely(++seq == PIN_BATCH)) {
++ if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
++ PIN_BATCH, NULL)))
++ BUG();
++ seq = 0;
++ }
++ }
++
++ return seq;
++}
++
++static void pgd_walk(pgd_t *pgd_base, pgprot_t flags)
++{
++ pgd_t *pgd = pgd_base;
++ pud_t *pud;
++ pmd_t *pmd;
++ int g, u, m;
++ unsigned int cpu, seq;
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return;
++
++ cpu = get_cpu();
++
++ for (g = 0, seq = 0; g < USER_PTRS_PER_PGD; g++, pgd++) {
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ if (PTRS_PER_PUD > 1) /* not folded */
++ seq = pgd_walk_set_prot(virt_to_page(pud),flags,cpu,seq);
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ if (PTRS_PER_PMD > 1) /* not folded */
++ seq = pgd_walk_set_prot(virt_to_page(pmd),flags,cpu,seq);
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++ if (pmd_none(*pmd))
++ continue;
++ seq = pgd_walk_set_prot(pmd_page(*pmd),flags,cpu,seq);
++ }
++ }
++ }
++
++ if (likely(seq != 0)) {
++ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
++ (unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH);
++ if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
++ seq + 1, NULL)))
++ BUG();
++ } else if(HYPERVISOR_update_va_mapping((unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH))
++ BUG();
++
++ put_cpu();
++}
++
++static void __pgd_pin(pgd_t *pgd)
++{
++ pgd_walk(pgd, PAGE_KERNEL_RO);
++ kmap_flush_unused();
++ xen_pgd_pin(__pa(pgd));
++ set_bit(PG_pinned, &virt_to_page(pgd)->flags);
++}
++
++static void __pgd_unpin(pgd_t *pgd)
++{
++ xen_pgd_unpin(__pa(pgd));
++ pgd_walk(pgd, PAGE_KERNEL);
++ clear_bit(PG_pinned, &virt_to_page(pgd)->flags);
++}
++
++static void pgd_test_and_unpin(pgd_t *pgd)
++{
++ if (test_bit(PG_pinned, &virt_to_page(pgd)->flags))
++ __pgd_unpin(pgd);
++}
++
++void mm_pin(struct mm_struct *mm)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++ pin_lock(mm);
++ __pgd_pin(mm->pgd);
++ pin_unlock(mm);
++}
++
++void mm_unpin(struct mm_struct *mm)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++ pin_lock(mm);
++ __pgd_unpin(mm->pgd);
++ pin_unlock(mm);
++}
++
++void mm_pin_all(void)
++{
++ struct page *page;
++ unsigned long flags;
++
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ /*
++ * Allow uninterrupted access to the pgd_list. Also protects
++ * __pgd_pin() by disabling preemption.
++ * All other CPUs must be at a safe point (e.g., in stop_machine
++ * or offlined entirely).
++ */
++ spin_lock_irqsave(&pgd_lock, flags);
++ for (page = pgd_list; page; page = (struct page *)page->index) {
++ if (!test_bit(PG_pinned, &page->flags))
++ __pgd_pin((pgd_t *)page_address(page));
++ }
++ spin_unlock_irqrestore(&pgd_lock, flags);
++}
++
++void _arch_dup_mmap(struct mm_struct *mm)
++{
++ if (!test_bit(PG_pinned, &virt_to_page(mm->pgd)->flags))
++ mm_pin(mm);
++}
++
++void _arch_exit_mmap(struct mm_struct *mm)
++{
++ struct task_struct *tsk = current;
++
++ task_lock(tsk);
++
++ /*
++ * We aggressively remove defunct pgd from cr3. We execute unmap_vmas()
++ * *much* faster this way, as no tlb flushes means bigger wrpt batches.
++ */
++ if (tsk->active_mm == mm) {
++ tsk->active_mm = &init_mm;
++ atomic_inc(&init_mm.mm_count);
++
++ switch_mm(mm, &init_mm, tsk);
++
++ atomic_dec(&mm->mm_count);
++ BUG_ON(atomic_read(&mm->mm_count) == 0);
++ }
++
++ task_unlock(tsk);
++
++ if (test_bit(PG_pinned, &virt_to_page(mm->pgd)->flags) &&
++ (atomic_read(&mm->mm_count) == 1) &&
++ !mm->context.has_foreign_mappings)
++ mm_unpin(mm);
++}
+Index: head-2008-11-25/arch/x86/oprofile/xenoprof.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/oprofile/xenoprof.c 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,179 @@
++/**
++ * @file xenoprof.c
++ *
++ * @remark Copyright 2002 OProfile authors
++ * @remark Read the file COPYING
++ *
++ * @author John Levon <levon@movementarian.org>
++ *
++ * Modified by Aravind Menon and Jose Renato Santos for Xen
++ * These modifications are:
++ * Copyright (C) 2005 Hewlett-Packard Co.
++ *
++ * x86-specific part
++ * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
++ * VA Linux Systems Japan K.K.
++ */
++
++#include <linux/init.h>
++#include <linux/oprofile.h>
++#include <linux/sched.h>
++#include <asm/pgtable.h>
++
++#include <xen/driver_util.h>
++#include <xen/interface/xen.h>
++#include <xen/interface/xenoprof.h>
++#include <xen/xenoprof.h>
++#include "op_counter.h"
++
++static unsigned int num_events = 0;
++
++void __init xenoprof_arch_init_counter(struct xenoprof_init *init)
++{
++ num_events = init->num_events;
++ /* just in case - make sure we do not overflow event list
++ (i.e. counter_config list) */
++ if (num_events > OP_MAX_COUNTER) {
++ num_events = OP_MAX_COUNTER;
++ init->num_events = num_events;
++ }
++}
++
++void xenoprof_arch_counter(void)
++{
++ int i;
++ struct xenoprof_counter counter;
++
++ for (i=0; i<num_events; i++) {
++ counter.ind = i;
++ counter.count = (uint64_t)counter_config[i].count;
++ counter.enabled = (uint32_t)counter_config[i].enabled;
++ counter.event = (uint32_t)counter_config[i].event;
++ counter.kernel = (uint32_t)counter_config[i].kernel;
++ counter.user = (uint32_t)counter_config[i].user;
++ counter.unit_mask = (uint64_t)counter_config[i].unit_mask;
++ WARN_ON(HYPERVISOR_xenoprof_op(XENOPROF_counter,
++ &counter));
++ }
++}
++
++void xenoprof_arch_start(void)
++{
++ /* nothing */
++}
++
++void xenoprof_arch_stop(void)
++{
++ /* nothing */
++}
++
++void xenoprof_arch_unmap_shared_buffer(struct xenoprof_shared_buffer * sbuf)
++{
++ if (sbuf->buffer) {
++ vunmap(sbuf->buffer);
++ sbuf->buffer = NULL;
++ }
++}
++
++int xenoprof_arch_map_shared_buffer(struct xenoprof_get_buffer * get_buffer,
++ struct xenoprof_shared_buffer * sbuf)
++{
++ int npages, ret;
++ struct vm_struct *area;
++
++ sbuf->buffer = NULL;
++ if ( (ret = HYPERVISOR_xenoprof_op(XENOPROF_get_buffer, get_buffer)) )
++ return ret;
++
++ npages = (get_buffer->bufsize * get_buffer->nbuf - 1) / PAGE_SIZE + 1;
++
++ area = alloc_vm_area(npages * PAGE_SIZE);
++ if (area == NULL)
++ return -ENOMEM;
++
++ if ( (ret = direct_kernel_remap_pfn_range(
++ (unsigned long)area->addr,
++ get_buffer->buf_gmaddr >> PAGE_SHIFT,
++ npages * PAGE_SIZE, __pgprot(_KERNPG_TABLE),
++ DOMID_SELF)) ) {
++ vunmap(area->addr);
++ return ret;
++ }
++
++ sbuf->buffer = area->addr;
++ return ret;
++}
++
++int xenoprof_arch_set_passive(struct xenoprof_passive * pdomain,
++ struct xenoprof_shared_buffer * sbuf)
++{
++ int ret;
++ int npages;
++ struct vm_struct *area;
++ pgprot_t prot = __pgprot(_KERNPG_TABLE);
++
++ sbuf->buffer = NULL;
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_set_passive, pdomain);
++ if (ret)
++ goto out;
++
++ npages = (pdomain->bufsize * pdomain->nbuf - 1) / PAGE_SIZE + 1;
++
++ area = alloc_vm_area(npages * PAGE_SIZE);
++ if (area == NULL) {
++ ret = -ENOMEM;
++ goto out;
++ }
++
++ ret = direct_kernel_remap_pfn_range(
++ (unsigned long)area->addr,
++ pdomain->buf_gmaddr >> PAGE_SHIFT,
++ npages * PAGE_SIZE, prot, DOMID_SELF);
++ if (ret) {
++ vunmap(area->addr);
++ goto out;
++ }
++ sbuf->buffer = area->addr;
++
++out:
++ return ret;
++}
++
++struct op_counter_config counter_config[OP_MAX_COUNTER];
++
++int xenoprof_create_files(struct super_block * sb, struct dentry * root)
++{
++ unsigned int i;
++
++ for (i = 0; i < num_events; ++i) {
++ struct dentry * dir;
++ char buf[2];
++
++ snprintf(buf, 2, "%d", i);
++ dir = oprofilefs_mkdir(sb, root, buf);
++ oprofilefs_create_ulong(sb, dir, "enabled",
++ &counter_config[i].enabled);
++ oprofilefs_create_ulong(sb, dir, "event",
++ &counter_config[i].event);
++ oprofilefs_create_ulong(sb, dir, "count",
++ &counter_config[i].count);
++ oprofilefs_create_ulong(sb, dir, "unit_mask",
++ &counter_config[i].unit_mask);
++ oprofilefs_create_ulong(sb, dir, "kernel",
++ &counter_config[i].kernel);
++ oprofilefs_create_ulong(sb, dir, "user",
++ &counter_config[i].user);
++ }
++
++ return 0;
++}
++
++int __init oprofile_arch_init(struct oprofile_operations * ops)
++{
++ return xenoprofile_init(ops);
++}
++
++void oprofile_arch_exit(void)
++{
++ xenoprofile_exit();
++}
+Index: head-2008-11-25/arch/x86/pci/irq-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/pci/irq-xen.c 2008-03-06 08:54:32.000000000 +0100
+@@ -0,0 +1,1211 @@
++/*
++ * Low-Level PCI Support for PC -- Routing of Interrupts
++ *
++ * (c) 1999--2000 Martin Mares <mj@ucw.cz>
++ */
++
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/pci.h>
++#include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/interrupt.h>
++#include <linux/dmi.h>
++#include <asm/io.h>
++#include <asm/smp.h>
++#include <asm/io_apic.h>
++#include <linux/irq.h>
++#include <linux/acpi.h>
++
++#include "pci.h"
++
++#define PIRQ_SIGNATURE (('$' << 0) + ('P' << 8) + ('I' << 16) + ('R' << 24))
++#define PIRQ_VERSION 0x0100
++
++static int broken_hp_bios_irq9;
++static int acer_tm360_irqrouting;
++
++static struct irq_routing_table *pirq_table;
++
++static int pirq_enable_irq(struct pci_dev *dev);
++
++/*
++ * Never use: 0, 1, 2 (timer, keyboard, and cascade)
++ * Avoid using: 13, 14 and 15 (FP error and IDE).
++ * Penalize: 3, 4, 6, 7, 12 (known ISA uses: serial, floppy, parallel and mouse)
++ */
++unsigned int pcibios_irq_mask = 0xfff8;
++
++static int pirq_penalty[16] = {
++ 1000000, 1000000, 1000000, 1000, 1000, 0, 1000, 1000,
++ 0, 0, 0, 0, 1000, 100000, 100000, 100000
++};
++
++struct irq_router {
++ char *name;
++ u16 vendor, device;
++ int (*get)(struct pci_dev *router, struct pci_dev *dev, int pirq);
++ int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq, int new);
++};
++
++struct irq_router_handler {
++ u16 vendor;
++ int (*probe)(struct irq_router *r, struct pci_dev *router, u16 device);
++};
++
++int (*pcibios_enable_irq)(struct pci_dev *dev) = NULL;
++void (*pcibios_disable_irq)(struct pci_dev *dev) = NULL;
++
++/*
++ * Check passed address for the PCI IRQ Routing Table signature
++ * and perform checksum verification.
++ */
++
++static inline struct irq_routing_table * pirq_check_routing_table(u8 *addr)
++{
++ struct irq_routing_table *rt;
++ int i;
++ u8 sum;
++
++ rt = (struct irq_routing_table *) addr;
++ if (rt->signature != PIRQ_SIGNATURE ||
++ rt->version != PIRQ_VERSION ||
++ rt->size % 16 ||
++ rt->size < sizeof(struct irq_routing_table))
++ return NULL;
++ sum = 0;
++ for (i=0; i < rt->size; i++)
++ sum += addr[i];
++ if (!sum) {
++ DBG(KERN_DEBUG "PCI: Interrupt Routing Table found at 0x%p\n", rt);
++ return rt;
++ }
++ return NULL;
++}
++
++
++
++/*
++ * Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table.
++ */
++
++static struct irq_routing_table * __init pirq_find_routing_table(void)
++{
++ u8 *addr;
++ struct irq_routing_table *rt;
++
++#ifdef CONFIG_XEN
++ if (!is_initial_xendomain())
++ return NULL;
++#endif
++ if (pirq_table_addr) {
++ rt = pirq_check_routing_table((u8 *) isa_bus_to_virt(pirq_table_addr));
++ if (rt)
++ return rt;
++ printk(KERN_WARNING "PCI: PIRQ table NOT found at pirqaddr\n");
++ }
++ for(addr = (u8 *) isa_bus_to_virt(0xf0000); addr < (u8 *) isa_bus_to_virt(0x100000); addr += 16) {
++ rt = pirq_check_routing_table(addr);
++ if (rt)
++ return rt;
++ }
++ return NULL;
++}
++
++/*
++ * If we have a IRQ routing table, use it to search for peer host
++ * bridges. It's a gross hack, but since there are no other known
++ * ways how to get a list of buses, we have to go this way.
++ */
++
++static void __init pirq_peer_trick(void)
++{
++ struct irq_routing_table *rt = pirq_table;
++ u8 busmap[256];
++ int i;
++ struct irq_info *e;
++
++ memset(busmap, 0, sizeof(busmap));
++ for(i=0; i < (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); i++) {
++ e = &rt->slots[i];
++#ifdef DEBUG
++ {
++ int j;
++ DBG(KERN_DEBUG "%02x:%02x slot=%02x", e->bus, e->devfn/8, e->slot);
++ for(j=0; j<4; j++)
++ DBG(" %d:%02x/%04x", j, e->irq[j].link, e->irq[j].bitmap);
++ DBG("\n");
++ }
++#endif
++ busmap[e->bus] = 1;
++ }
++ for(i = 1; i < 256; i++) {
++ if (!busmap[i] || pci_find_bus(0, i))
++ continue;
++ if (pci_scan_bus(i, &pci_root_ops, NULL))
++ printk(KERN_INFO "PCI: Discovered primary peer bus %02x [IRQ]\n", i);
++ }
++ pcibios_last_bus = -1;
++}
++
++/*
++ * Code for querying and setting of IRQ routes on various interrupt routers.
++ */
++
++void eisa_set_level_irq(unsigned int irq)
++{
++ unsigned char mask = 1 << (irq & 7);
++ unsigned int port = 0x4d0 + (irq >> 3);
++ unsigned char val;
++ static u16 eisa_irq_mask;
++
++ if (irq >= 16 || (1 << irq) & eisa_irq_mask)
++ return;
++
++ eisa_irq_mask |= (1 << irq);
++ printk(KERN_DEBUG "PCI: setting IRQ %u as level-triggered\n", irq);
++ val = inb(port);
++ if (!(val & mask)) {
++ DBG(KERN_DEBUG " -> edge");
++ outb(val | mask, port);
++ }
++}
++
++/*
++ * Common IRQ routing practice: nybbles in config space,
++ * offset by some magic constant.
++ */
++static unsigned int read_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr)
++{
++ u8 x;
++ unsigned reg = offset + (nr >> 1);
++
++ pci_read_config_byte(router, reg, &x);
++ return (nr & 1) ? (x >> 4) : (x & 0xf);
++}
++
++static void write_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr, unsigned int val)
++{
++ u8 x;
++ unsigned reg = offset + (nr >> 1);
++
++ pci_read_config_byte(router, reg, &x);
++ x = (nr & 1) ? ((x & 0x0f) | (val << 4)) : ((x & 0xf0) | val);
++ pci_write_config_byte(router, reg, x);
++}
++
++/*
++ * ALI pirq entries are damn ugly, and completely undocumented.
++ * This has been figured out from pirq tables, and it's not a pretty
++ * picture.
++ */
++static int pirq_ali_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ static const unsigned char irqmap[16] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 };
++
++ return irqmap[read_config_nybble(router, 0x48, pirq-1)];
++}
++
++static int pirq_ali_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ static const unsigned char irqmap[16] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 };
++ unsigned int val = irqmap[irq];
++
++ if (val) {
++ write_config_nybble(router, 0x48, pirq-1, val);
++ return 1;
++ }
++ return 0;
++}
++
++/*
++ * The Intel PIIX4 pirq rules are fairly simple: "pirq" is
++ * just a pointer to the config space.
++ */
++static int pirq_piix_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ u8 x;
++
++ pci_read_config_byte(router, pirq, &x);
++ return (x < 16) ? x : 0;
++}
++
++static int pirq_piix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ pci_write_config_byte(router, pirq, irq);
++ return 1;
++}
++
++/*
++ * The VIA pirq rules are nibble-based, like ALI,
++ * but without the ugly irq number munging.
++ * However, PIRQD is in the upper instead of lower 4 bits.
++ */
++static int pirq_via_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ return read_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq);
++}
++
++static int pirq_via_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ write_config_nybble(router, 0x55, pirq == 4 ? 5 : pirq, irq);
++ return 1;
++}
++
++/*
++ * The VIA pirq rules are nibble-based, like ALI,
++ * but without the ugly irq number munging.
++ * However, for 82C586, nibble map is different .
++ */
++static int pirq_via586_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 };
++ return read_config_nybble(router, 0x55, pirqmap[pirq-1]);
++}
++
++static int pirq_via586_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 };
++ write_config_nybble(router, 0x55, pirqmap[pirq-1], irq);
++ return 1;
++}
++
++/*
++ * ITE 8330G pirq rules are nibble-based
++ * FIXME: pirqmap may be { 1, 0, 3, 2 },
++ * 2+3 are both mapped to irq 9 on my system
++ */
++static int pirq_ite_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
++ return read_config_nybble(router,0x43, pirqmap[pirq-1]);
++}
++
++static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
++ write_config_nybble(router, 0x43, pirqmap[pirq-1], irq);
++ return 1;
++}
++
++/*
++ * OPTI: high four bits are nibble pointer..
++ * I wonder what the low bits do?
++ */
++static int pirq_opti_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ return read_config_nybble(router, 0xb8, pirq >> 4);
++}
++
++static int pirq_opti_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ write_config_nybble(router, 0xb8, pirq >> 4, irq);
++ return 1;
++}
++
++/*
++ * Cyrix: nibble offset 0x5C
++ * 0x5C bits 7:4 is INTB bits 3:0 is INTA
++ * 0x5D bits 7:4 is INTD bits 3:0 is INTC
++ */
++static int pirq_cyrix_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ return read_config_nybble(router, 0x5C, (pirq-1)^1);
++}
++
++static int pirq_cyrix_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ write_config_nybble(router, 0x5C, (pirq-1)^1, irq);
++ return 1;
++}
++
++/*
++ * PIRQ routing for SiS 85C503 router used in several SiS chipsets.
++ * We have to deal with the following issues here:
++ * - vendors have different ideas about the meaning of link values
++ * - some onboard devices (integrated in the chipset) have special
++ * links and are thus routed differently (i.e. not via PCI INTA-INTD)
++ * - different revision of the router have a different layout for
++ * the routing registers, particularly for the onchip devices
++ *
++ * For all routing registers the common thing is we have one byte
++ * per routeable link which is defined as:
++ * bit 7 IRQ mapping enabled (0) or disabled (1)
++ * bits [6:4] reserved (sometimes used for onchip devices)
++ * bits [3:0] IRQ to map to
++ * allowed: 3-7, 9-12, 14-15
++ * reserved: 0, 1, 2, 8, 13
++ *
++ * The config-space registers located at 0x41/0x42/0x43/0x44 are
++ * always used to route the normal PCI INT A/B/C/D respectively.
++ * Apparently there are systems implementing PCI routing table using
++ * link values 0x01-0x04 and others using 0x41-0x44 for PCI INTA..D.
++ * We try our best to handle both link mappings.
++ *
++ * Currently (2003-05-21) it appears most SiS chipsets follow the
++ * definition of routing registers from the SiS-5595 southbridge.
++ * According to the SiS 5595 datasheets the revision id's of the
++ * router (ISA-bridge) should be 0x01 or 0xb0.
++ *
++ * Furthermore we've also seen lspci dumps with revision 0x00 and 0xb1.
++ * Looks like these are used in a number of SiS 5xx/6xx/7xx chipsets.
++ * They seem to work with the current routing code. However there is
++ * some concern because of the two USB-OHCI HCs (original SiS 5595
++ * had only one). YMMV.
++ *
++ * Onchip routing for router rev-id 0x01/0xb0 and probably 0x00/0xb1:
++ *
++ * 0x61: IDEIRQ:
++ * bits [6:5] must be written 01
++ * bit 4 channel-select primary (0), secondary (1)
++ *
++ * 0x62: USBIRQ:
++ * bit 6 OHCI function disabled (0), enabled (1)
++ *
++ * 0x6a: ACPI/SCI IRQ: bits 4-6 reserved
++ *
++ * 0x7e: Data Acq. Module IRQ - bits 4-6 reserved
++ *
++ * We support USBIRQ (in addition to INTA-INTD) and keep the
++ * IDE, ACPI and DAQ routing untouched as set by the BIOS.
++ *
++ * Currently the only reported exception is the new SiS 65x chipset
++ * which includes the SiS 69x southbridge. Here we have the 85C503
++ * router revision 0x04 and there are changes in the register layout
++ * mostly related to the different USB HCs with USB 2.0 support.
++ *
++ * Onchip routing for router rev-id 0x04 (try-and-error observation)
++ *
++ * 0x60/0x61/0x62/0x63: 1xEHCI and 3xOHCI (companion) USB-HCs
++ * bit 6-4 are probably unused, not like 5595
++ */
++
++#define PIRQ_SIS_IRQ_MASK 0x0f
++#define PIRQ_SIS_IRQ_DISABLE 0x80
++#define PIRQ_SIS_USB_ENABLE 0x40
++
++static int pirq_sis_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ u8 x;
++ int reg;
++
++ reg = pirq;
++ if (reg >= 0x01 && reg <= 0x04)
++ reg += 0x40;
++ pci_read_config_byte(router, reg, &x);
++ return (x & PIRQ_SIS_IRQ_DISABLE) ? 0 : (x & PIRQ_SIS_IRQ_MASK);
++}
++
++static int pirq_sis_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ u8 x;
++ int reg;
++
++ reg = pirq;
++ if (reg >= 0x01 && reg <= 0x04)
++ reg += 0x40;
++ pci_read_config_byte(router, reg, &x);
++ x &= ~(PIRQ_SIS_IRQ_MASK | PIRQ_SIS_IRQ_DISABLE);
++ x |= irq ? irq: PIRQ_SIS_IRQ_DISABLE;
++ pci_write_config_byte(router, reg, x);
++ return 1;
++}
++
++
++/*
++ * VLSI: nibble offset 0x74 - educated guess due to routing table and
++ * config space of VLSI 82C534 PCI-bridge/router (1004:0102)
++ * Tested on HP OmniBook 800 covering PIRQ 1, 2, 4, 8 for onboard
++ * devices, PIRQ 3 for non-pci(!) soundchip and (untested) PIRQ 6
++ * for the busbridge to the docking station.
++ */
++
++static int pirq_vlsi_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ if (pirq > 8) {
++ printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq);
++ return 0;
++ }
++ return read_config_nybble(router, 0x74, pirq-1);
++}
++
++static int pirq_vlsi_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ if (pirq > 8) {
++ printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq);
++ return 0;
++ }
++ write_config_nybble(router, 0x74, pirq-1, irq);
++ return 1;
++}
++
++/*
++ * ServerWorks: PCI interrupts mapped to system IRQ lines through Index
++ * and Redirect I/O registers (0x0c00 and 0x0c01). The Index register
++ * format is (PCIIRQ## | 0x10), e.g.: PCIIRQ10=0x1a. The Redirect
++ * register is a straight binary coding of desired PIC IRQ (low nibble).
++ *
++ * The 'link' value in the PIRQ table is already in the correct format
++ * for the Index register. There are some special index values:
++ * 0x00 for ACPI (SCI), 0x01 for USB, 0x02 for IDE0, 0x04 for IDE1,
++ * and 0x03 for SMBus.
++ */
++static int pirq_serverworks_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ outb_p(pirq, 0xc00);
++ return inb(0xc01) & 0xf;
++}
++
++static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ outb_p(pirq, 0xc00);
++ outb_p(irq, 0xc01);
++ return 1;
++}
++
++/* Support for AMD756 PCI IRQ Routing
++ * Jhon H. Caicedo <jhcaiced@osso.org.co>
++ * Jun/21/2001 0.2.0 Release, fixed to use "nybble" functions... (jhcaiced)
++ * Jun/19/2001 Alpha Release 0.1.0 (jhcaiced)
++ * The AMD756 pirq rules are nibble-based
++ * offset 0x56 0-3 PIRQA 4-7 PIRQB
++ * offset 0x57 0-3 PIRQC 4-7 PIRQD
++ */
++static int pirq_amd756_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ u8 irq;
++ irq = 0;
++ if (pirq <= 4)
++ {
++ irq = read_config_nybble(router, 0x56, pirq - 1);
++ }
++ printk(KERN_INFO "AMD756: dev %04x:%04x, router pirq : %d get irq : %2d\n",
++ dev->vendor, dev->device, pirq, irq);
++ return irq;
++}
++
++static int pirq_amd756_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ printk(KERN_INFO "AMD756: dev %04x:%04x, router pirq : %d SET irq : %2d\n",
++ dev->vendor, dev->device, pirq, irq);
++ if (pirq <= 4)
++ {
++ write_config_nybble(router, 0x56, pirq - 1, irq);
++ }
++ return 1;
++}
++
++#ifdef CONFIG_PCI_BIOS
++
++static int pirq_bios_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++{
++ struct pci_dev *bridge;
++ int pin = pci_get_interrupt_pin(dev, &bridge);
++ return pcibios_set_irq_routing(bridge, pin, irq);
++}
++
++#endif
++
++static __init int intel_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ static struct pci_device_id __initdata pirq_440gx[] = {
++ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_0) },
++ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443GX_2) },
++ { },
++ };
++
++ /* 440GX has a proprietary PIRQ router -- don't use it */
++ if (pci_dev_present(pirq_440gx))
++ return 0;
++
++ switch(device)
++ {
++ case PCI_DEVICE_ID_INTEL_82371FB_0:
++ case PCI_DEVICE_ID_INTEL_82371SB_0:
++ case PCI_DEVICE_ID_INTEL_82371AB_0:
++ case PCI_DEVICE_ID_INTEL_82371MX:
++ case PCI_DEVICE_ID_INTEL_82443MX_0:
++ case PCI_DEVICE_ID_INTEL_82801AA_0:
++ case PCI_DEVICE_ID_INTEL_82801AB_0:
++ case PCI_DEVICE_ID_INTEL_82801BA_0:
++ case PCI_DEVICE_ID_INTEL_82801BA_10:
++ case PCI_DEVICE_ID_INTEL_82801CA_0:
++ case PCI_DEVICE_ID_INTEL_82801CA_12:
++ case PCI_DEVICE_ID_INTEL_82801DB_0:
++ case PCI_DEVICE_ID_INTEL_82801E_0:
++ case PCI_DEVICE_ID_INTEL_82801EB_0:
++ case PCI_DEVICE_ID_INTEL_ESB_1:
++ case PCI_DEVICE_ID_INTEL_ICH6_0:
++ case PCI_DEVICE_ID_INTEL_ICH6_1:
++ case PCI_DEVICE_ID_INTEL_ICH7_0:
++ case PCI_DEVICE_ID_INTEL_ICH7_1:
++ case PCI_DEVICE_ID_INTEL_ICH7_30:
++ case PCI_DEVICE_ID_INTEL_ICH7_31:
++ case PCI_DEVICE_ID_INTEL_ESB2_0:
++ case PCI_DEVICE_ID_INTEL_ICH8_0:
++ case PCI_DEVICE_ID_INTEL_ICH8_1:
++ case PCI_DEVICE_ID_INTEL_ICH8_2:
++ case PCI_DEVICE_ID_INTEL_ICH8_3:
++ case PCI_DEVICE_ID_INTEL_ICH8_4:
++ case PCI_DEVICE_ID_INTEL_ICH9_0:
++ case PCI_DEVICE_ID_INTEL_ICH9_1:
++ case PCI_DEVICE_ID_INTEL_ICH9_2:
++ case PCI_DEVICE_ID_INTEL_ICH9_3:
++ case PCI_DEVICE_ID_INTEL_ICH9_4:
++ case PCI_DEVICE_ID_INTEL_ICH9_5:
++ r->name = "PIIX/ICH";
++ r->get = pirq_piix_get;
++ r->set = pirq_piix_set;
++ return 1;
++ }
++ return 0;
++}
++
++static __init int via_router_probe(struct irq_router *r,
++ struct pci_dev *router, u16 device)
++{
++ /* FIXME: We should move some of the quirk fixup stuff here */
++
++ /*
++ * work arounds for some buggy BIOSes
++ */
++ if (device == PCI_DEVICE_ID_VIA_82C586_0) {
++ switch(router->device) {
++ case PCI_DEVICE_ID_VIA_82C686:
++ /*
++ * Asus k7m bios wrongly reports 82C686A
++ * as 586-compatible
++ */
++ device = PCI_DEVICE_ID_VIA_82C686;
++ break;
++ case PCI_DEVICE_ID_VIA_8235:
++ /**
++ * Asus a7v-x bios wrongly reports 8235
++ * as 586-compatible
++ */
++ device = PCI_DEVICE_ID_VIA_8235;
++ break;
++ }
++ }
++
++ switch(device) {
++ case PCI_DEVICE_ID_VIA_82C586_0:
++ r->name = "VIA";
++ r->get = pirq_via586_get;
++ r->set = pirq_via586_set;
++ return 1;
++ case PCI_DEVICE_ID_VIA_82C596:
++ case PCI_DEVICE_ID_VIA_82C686:
++ case PCI_DEVICE_ID_VIA_8231:
++ case PCI_DEVICE_ID_VIA_8233A:
++ case PCI_DEVICE_ID_VIA_8235:
++ case PCI_DEVICE_ID_VIA_8237:
++ /* FIXME: add new ones for 8233/5 */
++ r->name = "VIA";
++ r->get = pirq_via_get;
++ r->set = pirq_via_set;
++ return 1;
++ }
++ return 0;
++}
++
++static __init int vlsi_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ switch(device)
++ {
++ case PCI_DEVICE_ID_VLSI_82C534:
++ r->name = "VLSI 82C534";
++ r->get = pirq_vlsi_get;
++ r->set = pirq_vlsi_set;
++ return 1;
++ }
++ return 0;
++}
++
++
++static __init int serverworks_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ switch(device)
++ {
++ case PCI_DEVICE_ID_SERVERWORKS_OSB4:
++ case PCI_DEVICE_ID_SERVERWORKS_CSB5:
++ r->name = "ServerWorks";
++ r->get = pirq_serverworks_get;
++ r->set = pirq_serverworks_set;
++ return 1;
++ }
++ return 0;
++}
++
++static __init int sis_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ if (device != PCI_DEVICE_ID_SI_503)
++ return 0;
++
++ r->name = "SIS";
++ r->get = pirq_sis_get;
++ r->set = pirq_sis_set;
++ return 1;
++}
++
++static __init int cyrix_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ switch(device)
++ {
++ case PCI_DEVICE_ID_CYRIX_5520:
++ r->name = "NatSemi";
++ r->get = pirq_cyrix_get;
++ r->set = pirq_cyrix_set;
++ return 1;
++ }
++ return 0;
++}
++
++static __init int opti_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ switch(device)
++ {
++ case PCI_DEVICE_ID_OPTI_82C700:
++ r->name = "OPTI";
++ r->get = pirq_opti_get;
++ r->set = pirq_opti_set;
++ return 1;
++ }
++ return 0;
++}
++
++static __init int ite_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ switch(device)
++ {
++ case PCI_DEVICE_ID_ITE_IT8330G_0:
++ r->name = "ITE";
++ r->get = pirq_ite_get;
++ r->set = pirq_ite_set;
++ return 1;
++ }
++ return 0;
++}
++
++static __init int ali_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ switch(device)
++ {
++ case PCI_DEVICE_ID_AL_M1533:
++ case PCI_DEVICE_ID_AL_M1563:
++ printk(KERN_DEBUG "PCI: Using ALI IRQ Router\n");
++ r->name = "ALI";
++ r->get = pirq_ali_get;
++ r->set = pirq_ali_set;
++ return 1;
++ }
++ return 0;
++}
++
++static __init int amd_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ switch(device)
++ {
++ case PCI_DEVICE_ID_AMD_VIPER_740B:
++ r->name = "AMD756";
++ break;
++ case PCI_DEVICE_ID_AMD_VIPER_7413:
++ r->name = "AMD766";
++ break;
++ case PCI_DEVICE_ID_AMD_VIPER_7443:
++ r->name = "AMD768";
++ break;
++ default:
++ return 0;
++ }
++ r->get = pirq_amd756_get;
++ r->set = pirq_amd756_set;
++ return 1;
++}
++
++static __initdata struct irq_router_handler pirq_routers[] = {
++ { PCI_VENDOR_ID_INTEL, intel_router_probe },
++ { PCI_VENDOR_ID_AL, ali_router_probe },
++ { PCI_VENDOR_ID_ITE, ite_router_probe },
++ { PCI_VENDOR_ID_VIA, via_router_probe },
++ { PCI_VENDOR_ID_OPTI, opti_router_probe },
++ { PCI_VENDOR_ID_SI, sis_router_probe },
++ { PCI_VENDOR_ID_CYRIX, cyrix_router_probe },
++ { PCI_VENDOR_ID_VLSI, vlsi_router_probe },
++ { PCI_VENDOR_ID_SERVERWORKS, serverworks_router_probe },
++ { PCI_VENDOR_ID_AMD, amd_router_probe },
++ /* Someone with docs needs to add the ATI Radeon IGP */
++ { 0, NULL }
++};
++static struct irq_router pirq_router;
++static struct pci_dev *pirq_router_dev;
++
++
++/*
++ * FIXME: should we have an option to say "generic for
++ * chipset" ?
++ */
++
++static void __init pirq_find_router(struct irq_router *r)
++{
++ struct irq_routing_table *rt = pirq_table;
++ struct irq_router_handler *h;
++
++#ifdef CONFIG_PCI_BIOS
++ if (!rt->signature) {
++ printk(KERN_INFO "PCI: Using BIOS for IRQ routing\n");
++ r->set = pirq_bios_set;
++ r->name = "BIOS";
++ return;
++ }
++#endif
++
++ /* Default unless a driver reloads it */
++ r->name = "default";
++ r->get = NULL;
++ r->set = NULL;
++
++ DBG(KERN_DEBUG "PCI: Attempting to find IRQ router for %04x:%04x\n",
++ rt->rtr_vendor, rt->rtr_device);
++
++ pirq_router_dev = pci_find_slot(rt->rtr_bus, rt->rtr_devfn);
++ if (!pirq_router_dev) {
++ DBG(KERN_DEBUG "PCI: Interrupt router not found at "
++ "%02x:%02x\n", rt->rtr_bus, rt->rtr_devfn);
++ return;
++ }
++
++ for( h = pirq_routers; h->vendor; h++) {
++ /* First look for a router match */
++ if (rt->rtr_vendor == h->vendor && h->probe(r, pirq_router_dev, rt->rtr_device))
++ break;
++ /* Fall back to a device match */
++ if (pirq_router_dev->vendor == h->vendor && h->probe(r, pirq_router_dev, pirq_router_dev->device))
++ break;
++ }
++ printk(KERN_INFO "PCI: Using IRQ router %s [%04x/%04x] at %s\n",
++ pirq_router.name,
++ pirq_router_dev->vendor,
++ pirq_router_dev->device,
++ pci_name(pirq_router_dev));
++}
++
++static struct irq_info *pirq_get_info(struct pci_dev *dev)
++{
++ struct irq_routing_table *rt = pirq_table;
++ int entries = (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
++ struct irq_info *info;
++
++ for (info = rt->slots; entries--; info++)
++ if (info->bus == dev->bus->number && PCI_SLOT(info->devfn) == PCI_SLOT(dev->devfn))
++ return info;
++ return NULL;
++}
++
++static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
++{
++ u8 pin;
++ struct irq_info *info;
++ int i, pirq, newirq;
++ int irq = 0;
++ u32 mask;
++ struct irq_router *r = &pirq_router;
++ struct pci_dev *dev2 = NULL;
++ char *msg = NULL;
++
++ /* Find IRQ pin */
++ pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
++ if (!pin) {
++ DBG(KERN_DEBUG " -> no interrupt pin\n");
++ return 0;
++ }
++ pin = pin - 1;
++
++ /* Find IRQ routing entry */
++
++ if (!pirq_table)
++ return 0;
++
++ DBG(KERN_DEBUG "IRQ for %s[%c]", pci_name(dev), 'A' + pin);
++ info = pirq_get_info(dev);
++ if (!info) {
++ DBG(" -> not found in routing table\n" KERN_DEBUG);
++ return 0;
++ }
++ pirq = info->irq[pin].link;
++ mask = info->irq[pin].bitmap;
++ if (!pirq) {
++ DBG(" -> not routed\n" KERN_DEBUG);
++ return 0;
++ }
++ DBG(" -> PIRQ %02x, mask %04x, excl %04x", pirq, mask, pirq_table->exclusive_irqs);
++ mask &= pcibios_irq_mask;
++
++ /* Work around broken HP Pavilion Notebooks which assign USB to
++ IRQ 9 even though it is actually wired to IRQ 11 */
++
++ if (broken_hp_bios_irq9 && pirq == 0x59 && dev->irq == 9) {
++ dev->irq = 11;
++ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11);
++ r->set(pirq_router_dev, dev, pirq, 11);
++ }
++
++ /* same for Acer Travelmate 360, but with CB and irq 11 -> 10 */
++ if (acer_tm360_irqrouting && dev->irq == 11 && dev->vendor == PCI_VENDOR_ID_O2) {
++ pirq = 0x68;
++ mask = 0x400;
++ dev->irq = r->get(pirq_router_dev, dev, pirq);
++ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
++ }
++
++ /*
++ * Find the best IRQ to assign: use the one
++ * reported by the device if possible.
++ */
++ newirq = dev->irq;
++ if (newirq && !((1 << newirq) & mask)) {
++ if ( pci_probe & PCI_USE_PIRQ_MASK) newirq = 0;
++ else printk("\n" KERN_WARNING
++ "PCI: IRQ %i for device %s doesn't match PIRQ mask "
++ "- try pci=usepirqmask\n" KERN_DEBUG, newirq,
++ pci_name(dev));
++ }
++ if (!newirq && assign) {
++ for (i = 0; i < 16; i++) {
++ if (!(mask & (1 << i)))
++ continue;
++ if (pirq_penalty[i] < pirq_penalty[newirq] && can_request_irq(i, IRQF_SHARED))
++ newirq = i;
++ }
++ }
++ DBG(" -> newirq=%d", newirq);
++
++ /* Check if it is hardcoded */
++ if ((pirq & 0xf0) == 0xf0) {
++ irq = pirq & 0xf;
++ DBG(" -> hardcoded IRQ %d\n", irq);
++ msg = "Hardcoded";
++ } else if ( r->get && (irq = r->get(pirq_router_dev, dev, pirq)) && \
++ ((!(pci_probe & PCI_USE_PIRQ_MASK)) || ((1 << irq) & mask)) ) {
++ DBG(" -> got IRQ %d\n", irq);
++ msg = "Found";
++ eisa_set_level_irq(irq);
++ } else if (newirq && r->set && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) {
++ DBG(" -> assigning IRQ %d", newirq);
++ if (r->set(pirq_router_dev, dev, pirq, newirq)) {
++ eisa_set_level_irq(newirq);
++ DBG(" ... OK\n");
++ msg = "Assigned";
++ irq = newirq;
++ }
++ }
++
++ if (!irq) {
++ DBG(" ... failed\n");
++ if (newirq && mask == (1 << newirq)) {
++ msg = "Guessed";
++ irq = newirq;
++ } else
++ return 0;
++ }
++ printk(KERN_INFO "PCI: %s IRQ %d for device %s\n", msg, irq, pci_name(dev));
++
++ /* Update IRQ for all devices with the same pirq value */
++ while ((dev2 = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev2)) != NULL) {
++ pci_read_config_byte(dev2, PCI_INTERRUPT_PIN, &pin);
++ if (!pin)
++ continue;
++ pin--;
++ info = pirq_get_info(dev2);
++ if (!info)
++ continue;
++ if (info->irq[pin].link == pirq) {
++ /* We refuse to override the dev->irq information. Give a warning! */
++ if ( dev2->irq && dev2->irq != irq && \
++ (!(pci_probe & PCI_USE_PIRQ_MASK) || \
++ ((1 << dev2->irq) & mask)) ) {
++#ifndef CONFIG_PCI_MSI
++ printk(KERN_INFO "IRQ routing conflict for %s, have irq %d, want irq %d\n",
++ pci_name(dev2), dev2->irq, irq);
++#endif
++ continue;
++ }
++ dev2->irq = irq;
++ pirq_penalty[irq]++;
++ if (dev != dev2)
++ printk(KERN_INFO "PCI: Sharing IRQ %d with %s\n", irq, pci_name(dev2));
++ }
++ }
++ return 1;
++}
++
++static void __init pcibios_fixup_irqs(void)
++{
++ struct pci_dev *dev = NULL;
++ u8 pin;
++
++ DBG(KERN_DEBUG "PCI: IRQ fixup\n");
++ while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
++ /*
++ * If the BIOS has set an out of range IRQ number, just ignore it.
++ * Also keep track of which IRQ's are already in use.
++ */
++ if (dev->irq >= 16) {
++ DBG(KERN_DEBUG "%s: ignoring bogus IRQ %d\n", pci_name(dev), dev->irq);
++ dev->irq = 0;
++ }
++ /* If the IRQ is already assigned to a PCI device, ignore its ISA use penalty */
++ if (pirq_penalty[dev->irq] >= 100 && pirq_penalty[dev->irq] < 100000)
++ pirq_penalty[dev->irq] = 0;
++ pirq_penalty[dev->irq]++;
++ }
++
++ dev = NULL;
++ while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
++ pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
++#ifdef CONFIG_X86_IO_APIC
++ /*
++ * Recalculate IRQ numbers if we use the I/O APIC.
++ */
++ if (io_apic_assign_pci_irqs)
++ {
++ int irq;
++
++ if (pin) {
++ pin--; /* interrupt pins are numbered starting from 1 */
++ irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin);
++ /*
++ * Busses behind bridges are typically not listed in the MP-table.
++ * In this case we have to look up the IRQ based on the parent bus,
++ * parent slot, and pin number. The SMP code detects such bridged
++ * busses itself so we should get into this branch reliably.
++ */
++ if (irq < 0 && dev->bus->parent) { /* go back to the bridge */
++ struct pci_dev * bridge = dev->bus->self;
++
++ pin = (pin + PCI_SLOT(dev->devfn)) % 4;
++ irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
++ PCI_SLOT(bridge->devfn), pin);
++ if (irq >= 0)
++ printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n",
++ pci_name(bridge), 'A' + pin, irq);
++ }
++ if (irq >= 0) {
++ if (use_pci_vector() &&
++ !platform_legacy_irq(irq))
++ irq = IO_APIC_VECTOR(irq);
++
++ printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n",
++ pci_name(dev), 'A' + pin, irq);
++ dev->irq = irq;
++ }
++ }
++ }
++#endif
++ /*
++ * Still no IRQ? Try to lookup one...
++ */
++ if (pin && !dev->irq)
++ pcibios_lookup_irq(dev, 0);
++ }
++}
++
++/*
++ * Work around broken HP Pavilion Notebooks which assign USB to
++ * IRQ 9 even though it is actually wired to IRQ 11
++ */
++static int __init fix_broken_hp_bios_irq9(struct dmi_system_id *d)
++{
++ if (!broken_hp_bios_irq9) {
++ broken_hp_bios_irq9 = 1;
++ printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident);
++ }
++ return 0;
++}
++
++/*
++ * Work around broken Acer TravelMate 360 Notebooks which assign
++ * Cardbus to IRQ 11 even though it is actually wired to IRQ 10
++ */
++static int __init fix_acer_tm360_irqrouting(struct dmi_system_id *d)
++{
++ if (!acer_tm360_irqrouting) {
++ acer_tm360_irqrouting = 1;
++ printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident);
++ }
++ return 0;
++}
++
++static struct dmi_system_id __initdata pciirq_dmi_table[] = {
++ {
++ .callback = fix_broken_hp_bios_irq9,
++ .ident = "HP Pavilion N5400 Series Laptop",
++ .matches = {
++ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
++ DMI_MATCH(DMI_BIOS_VERSION, "GE.M1.03"),
++ DMI_MATCH(DMI_PRODUCT_VERSION, "HP Pavilion Notebook Model GE"),
++ DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
++ },
++ },
++ {
++ .callback = fix_acer_tm360_irqrouting,
++ .ident = "Acer TravelMate 36x Laptop",
++ .matches = {
++ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
++ DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
++ },
++ },
++ { }
++};
++
++static int __init pcibios_irq_init(void)
++{
++ DBG(KERN_DEBUG "PCI: IRQ init\n");
++
++ if (pcibios_enable_irq || raw_pci_ops == NULL)
++ return 0;
++
++ dmi_check_system(pciirq_dmi_table);
++
++ pirq_table = pirq_find_routing_table();
++
++#ifdef CONFIG_PCI_BIOS
++ if (!pirq_table && (pci_probe & PCI_BIOS_IRQ_SCAN))
++ pirq_table = pcibios_get_irq_routing_table();
++#endif
++ if (pirq_table) {
++ pirq_peer_trick();
++ pirq_find_router(&pirq_router);
++ if (pirq_table->exclusive_irqs) {
++ int i;
++ for (i=0; i<16; i++)
++ if (!(pirq_table->exclusive_irqs & (1 << i)))
++ pirq_penalty[i] += 100;
++ }
++ /* If we're using the I/O APIC, avoid using the PCI IRQ routing table */
++ if (io_apic_assign_pci_irqs)
++ pirq_table = NULL;
++ }
++
++ pcibios_enable_irq = pirq_enable_irq;
++
++ pcibios_fixup_irqs();
++ return 0;
++}
++
++subsys_initcall(pcibios_irq_init);
++
++
++static void pirq_penalize_isa_irq(int irq, int active)
++{
++ /*
++ * If any ISAPnP device reports an IRQ in its list of possible
++ * IRQ's, we try to avoid assigning it to PCI devices.
++ */
++ if (irq < 16) {
++ if (active)
++ pirq_penalty[irq] += 1000;
++ else
++ pirq_penalty[irq] += 100;
++ }
++}
++
++void pcibios_penalize_isa_irq(int irq, int active)
++{
++#ifdef CONFIG_ACPI
++ if (!acpi_noirq)
++ acpi_penalize_isa_irq(irq, active);
++ else
++#endif
++ pirq_penalize_isa_irq(irq, active);
++}
++
++static int pirq_enable_irq(struct pci_dev *dev)
++{
++ u8 pin;
++ struct pci_dev *temp_dev;
++
++ pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
++ if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) {
++ char *msg = "";
++
++ pin--; /* interrupt pins are numbered starting from 1 */
++
++ if (io_apic_assign_pci_irqs) {
++ int irq;
++
++ irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin);
++ /*
++ * Busses behind bridges are typically not listed in the MP-table.
++ * In this case we have to look up the IRQ based on the parent bus,
++ * parent slot, and pin number. The SMP code detects such bridged
++ * busses itself so we should get into this branch reliably.
++ */
++ temp_dev = dev;
++ while (irq < 0 && dev->bus->parent) { /* go back to the bridge */
++ struct pci_dev * bridge = dev->bus->self;
++
++ pin = (pin + PCI_SLOT(dev->devfn)) % 4;
++ irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
++ PCI_SLOT(bridge->devfn), pin);
++ if (irq >= 0)
++ printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n",
++ pci_name(bridge), 'A' + pin, irq);
++ dev = bridge;
++ }
++ dev = temp_dev;
++ if (irq >= 0) {
++#ifdef CONFIG_PCI_MSI
++ if (!platform_legacy_irq(irq))
++ irq = IO_APIC_VECTOR(irq);
++#endif
++ printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n",
++ pci_name(dev), 'A' + pin, irq);
++ dev->irq = irq;
++ return 0;
++ } else
++ msg = " Probably buggy MP table.";
++ } else if (pci_probe & PCI_BIOS_IRQ_SCAN)
++ msg = "";
++ else
++ msg = " Please try using pci=biosirq.";
++
++ /* With IDE legacy devices the IRQ lookup failure is not a problem.. */
++ if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && !(dev->class & 0x5))
++ return 0;
++
++ printk(KERN_WARNING "PCI: No IRQ known for interrupt pin %c of device %s.%s\n",
++ 'A' + pin, pci_name(dev), msg);
++ }
++ return 0;
++}
++
++int pci_vector_resources(int last, int nr_released)
++{
++ int count = nr_released;
++
++ int next = last;
++ int offset = (last % 8);
++
++ while (next < FIRST_SYSTEM_VECTOR) {
++ next += 8;
++#ifdef CONFIG_X86_64
++ if (next == IA32_SYSCALL_VECTOR)
++ continue;
++#else
++ if (next == SYSCALL_VECTOR)
++ continue;
++#endif
++ count++;
++ if (next >= FIRST_SYSTEM_VECTOR) {
++ if (offset%8) {
++ next = FIRST_DEVICE_VECTOR + offset;
++ offset++;
++ continue;
++ }
++ count--;
++ }
++ }
++
++ return count;
++}
+Index: head-2008-11-25/arch/x86/pci/pcifront.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/pci/pcifront.c 2007-06-12 13:12:49.000000000 +0200
+@@ -0,0 +1,55 @@
++/*
++ * PCI Frontend Stub - puts some "dummy" functions in to the Linux x86 PCI core
++ * to support the Xen PCI Frontend's operation
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/pci.h>
++#include <asm/acpi.h>
++#include "pci.h"
++
++static int pcifront_enable_irq(struct pci_dev *dev)
++{
++ u8 irq;
++ pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
++ dev->irq = irq;
++
++ return 0;
++}
++
++extern u8 pci_cache_line_size;
++
++static int __init pcifront_x86_stub_init(void)
++{
++ struct cpuinfo_x86 *c = &boot_cpu_data;
++
++ /* Only install our method if we haven't found real hardware already */
++ if (raw_pci_ops)
++ return 0;
++
++ printk(KERN_INFO "PCI: setting up Xen PCI frontend stub\n");
++
++ /* Copied from arch/i386/pci/common.c */
++ pci_cache_line_size = 32 >> 2;
++ if (c->x86 >= 6 && c->x86_vendor == X86_VENDOR_AMD)
++ pci_cache_line_size = 64 >> 2; /* K7 & K8 */
++ else if (c->x86 > 6 && c->x86_vendor == X86_VENDOR_INTEL)
++ pci_cache_line_size = 128 >> 2; /* P4 */
++
++ /* On x86, we need to disable the normal IRQ routing table and
++ * just ask the backend
++ */
++ pcibios_enable_irq = pcifront_enable_irq;
++ pcibios_disable_irq = NULL;
++
++#ifdef CONFIG_ACPI
++ /* Keep ACPI out of the picture */
++ acpi_noirq = 1;
++#endif
++
++ return 0;
++}
++
++arch_initcall(pcifront_x86_stub_init);
+Index: head-2008-11-25/arch/x86/ia32/ia32entry-xen.S
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/ia32/ia32entry-xen.S 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,666 @@
++/*
++ * Compatibility mode system call entry point for x86-64.
++ *
++ * Copyright 2000-2002 Andi Kleen, SuSE Labs.
++ */
++
++#include <asm/dwarf2.h>
++#include <asm/calling.h>
++#include <asm/asm-offsets.h>
++#include <asm/current.h>
++#include <asm/errno.h>
++#include <asm/ia32_unistd.h>
++#include <asm/thread_info.h>
++#include <asm/segment.h>
++#include <asm/vsyscall32.h>
++#include <asm/irqflags.h>
++#include <linux/linkage.h>
++
++#define IA32_NR_syscalls ((ia32_syscall_end - ia32_sys_call_table)/8)
++
++ .macro IA32_ARG_FIXUP noebp=0
++ movl %edi,%r8d
++ .if \noebp
++ .else
++ movl %ebp,%r9d
++ .endif
++ xchg %ecx,%esi
++ movl %ebx,%edi
++ movl %edx,%edx /* zero extension */
++ .endm
++
++ /* clobbers %eax */
++ .macro CLEAR_RREGS
++ xorl %eax,%eax
++ movq %rax,R11(%rsp)
++ movq %rax,R10(%rsp)
++ movq %rax,R9(%rsp)
++ movq %rax,R8(%rsp)
++ .endm
++
++ .macro LOAD_ARGS32 offset
++ movl \offset(%rsp),%r11d
++ movl \offset+8(%rsp),%r10d
++ movl \offset+16(%rsp),%r9d
++ movl \offset+24(%rsp),%r8d
++ movl \offset+40(%rsp),%ecx
++ movl \offset+48(%rsp),%edx
++ movl \offset+56(%rsp),%esi
++ movl \offset+64(%rsp),%edi
++ movl \offset+72(%rsp),%eax
++ .endm
++
++ .macro CFI_STARTPROC32 simple
++ CFI_STARTPROC \simple
++ CFI_UNDEFINED r8
++ CFI_UNDEFINED r9
++ CFI_UNDEFINED r10
++ CFI_UNDEFINED r11
++ CFI_UNDEFINED r12
++ CFI_UNDEFINED r13
++ CFI_UNDEFINED r14
++ CFI_UNDEFINED r15
++ .endm
++
++/*
++ * 32bit SYSENTER instruction entry.
++ *
++ * Arguments:
++ * %eax System call number.
++ * %ebx Arg1
++ * %ecx Arg2
++ * %edx Arg3
++ * %esi Arg4
++ * %edi Arg5
++ * %ebp user stack
++ * 0(%ebp) Arg6
++ *
++ * Interrupts on.
++ *
++ * This is purely a fast path. For anything complicated we use the int 0x80
++ * path below. Set up a complete hardware stack frame to share code
++ * with the int 0x80 path.
++ */
++ENTRY(ia32_sysenter_target)
++ CFI_STARTPROC32 simple
++ CFI_DEF_CFA rsp,SS+8-RIP+16
++ /*CFI_REL_OFFSET ss,SS-RIP+16*/
++ CFI_REL_OFFSET rsp,RSP-RIP+16
++ /*CFI_REL_OFFSET rflags,EFLAGS-RIP+16*/
++ /*CFI_REL_OFFSET cs,CS-RIP+16*/
++ CFI_REL_OFFSET rip,RIP-RIP+16
++ CFI_REL_OFFSET r11,8
++ CFI_REL_OFFSET rcx,0
++ movq 8(%rsp),%r11
++ CFI_RESTORE r11
++ popq %rcx
++ CFI_ADJUST_CFA_OFFSET -8
++ CFI_RESTORE rcx
++ movl %ebp,%ebp /* zero extension */
++ movl %eax,%eax
++ movl $__USER32_DS,40(%rsp)
++ movq %rbp,32(%rsp)
++ movl $__USER32_CS,16(%rsp)
++ movl $VSYSCALL32_SYSEXIT,8(%rsp)
++ movq %rax,(%rsp)
++ cld
++ SAVE_ARGS 0,0,0
++ /* no need to do an access_ok check here because rbp has been
++ 32bit zero extended */
++1: movl (%rbp),%r9d
++ .section __ex_table,"a"
++ .quad 1b,ia32_badarg
++ .previous
++ GET_THREAD_INFO(%r10)
++ orl $TS_COMPAT,threadinfo_status(%r10)
++ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
++ jnz sysenter_tracesys
++sysenter_do_call:
++ cmpl $(IA32_NR_syscalls-1),%eax
++ ja ia32_badsys
++ IA32_ARG_FIXUP 1
++ call *ia32_sys_call_table(,%rax,8)
++ movq %rax,RAX-ARGOFFSET(%rsp)
++ jmp int_ret_from_sys_call
++
++sysenter_tracesys:
++ SAVE_REST
++ CLEAR_RREGS
++ movq $-ENOSYS,RAX(%rsp) /* really needed? */
++ movq %rsp,%rdi /* &pt_regs -> arg1 */
++ call syscall_trace_enter
++ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
++ RESTORE_REST
++ movl %ebp, %ebp
++ /* no need to do an access_ok check here because rbp has been
++ 32bit zero extended */
++1: movl (%rbp),%r9d
++ .section __ex_table,"a"
++ .quad 1b,ia32_badarg
++ .previous
++ jmp sysenter_do_call
++ CFI_ENDPROC
++ENDPROC(ia32_sysenter_target)
++
++/*
++ * 32bit SYSCALL instruction entry.
++ *
++ * Arguments:
++ * %eax System call number.
++ * %ebx Arg1
++ * %ecx return EIP
++ * %edx Arg3
++ * %esi Arg4
++ * %edi Arg5
++ * %ebp Arg2 [note: not saved in the stack frame, should not be touched]
++ * %esp user stack
++ * 0(%esp) Arg6
++ *
++ * Interrupts on.
++ *
++ * This is purely a fast path. For anything complicated we use the int 0x80
++ * path below. Set up a complete hardware stack frame to share code
++ * with the int 0x80 path.
++ */
++ENTRY(ia32_cstar_target)
++ CFI_STARTPROC32 simple
++ CFI_DEF_CFA rsp,SS+8-RIP+16
++ /*CFI_REL_OFFSET ss,SS-RIP+16*/
++ CFI_REL_OFFSET rsp,RSP-RIP+16
++ /*CFI_REL_OFFSET rflags,EFLAGS-RIP+16*/
++ /*CFI_REL_OFFSET cs,CS-RIP+16*/
++ CFI_REL_OFFSET rip,RIP-RIP+16
++ movl %eax,%eax /* zero extension */
++ movl RSP-RIP+16(%rsp),%r8d
++ SAVE_ARGS -8,1,1
++ movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
++ movq %rbp,RCX-ARGOFFSET(%rsp) /* this lies slightly to ptrace */
++ movl %ebp,%ecx
++ movl $__USER32_CS,CS-ARGOFFSET(%rsp)
++ movl $__USER32_DS,SS-ARGOFFSET(%rsp)
++ /* no need to do an access_ok check here because r8 has been
++ 32bit zero extended */
++ /* hardware stack frame is complete now */
++1: movl (%r8),%r9d
++ .section __ex_table,"a"
++ .quad 1b,ia32_badarg
++ .previous
++ GET_THREAD_INFO(%r10)
++ orl $TS_COMPAT,threadinfo_status(%r10)
++ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
++ jnz cstar_tracesys
++cstar_do_call:
++ cmpl $IA32_NR_syscalls-1,%eax
++ ja ia32_badsys
++ IA32_ARG_FIXUP 1
++ call *ia32_sys_call_table(,%rax,8)
++ movq %rax,RAX-ARGOFFSET(%rsp)
++ jmp int_ret_from_sys_call
++
++cstar_tracesys:
++ SAVE_REST
++ CLEAR_RREGS
++ movq $-ENOSYS,RAX(%rsp) /* really needed? */
++ movq %rsp,%rdi /* &pt_regs -> arg1 */
++ call syscall_trace_enter
++ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
++ RESTORE_REST
++ movl RSP-ARGOFFSET(%rsp), %r8d
++ /* no need to do an access_ok check here because r8 has been
++ 32bit zero extended */
++1: movl (%r8),%r9d
++ .section __ex_table,"a"
++ .quad 1b,ia32_badarg
++ .previous
++ jmp cstar_do_call
++END(ia32_cstar_target)
++
++ia32_badarg:
++ movq $-EFAULT,%rax
++ jmp ia32_sysret
++ CFI_ENDPROC
++
++/*
++ * Emulated IA32 system calls via int 0x80.
++ *
++ * Arguments:
++ * %eax System call number.
++ * %ebx Arg1
++ * %ecx Arg2
++ * %edx Arg3
++ * %esi Arg4
++ * %edi Arg5
++ * %ebp Arg6 [note: not saved in the stack frame, should not be touched]
++ *
++ * Notes:
++ * Uses the same stack frame as the x86-64 version.
++ * All registers except %eax must be saved (but ptrace may violate that)
++ * Arguments are zero extended. For system calls that want sign extension and
++ * take long arguments a wrapper is needed. Most calls can just be called
++ * directly.
++ * Assumes it is only called from user space and entered with interrupts on.
++ */
++
++ENTRY(ia32_syscall)
++ CFI_STARTPROC simple
++ CFI_DEF_CFA rsp,SS+8-RIP+16
++ /*CFI_REL_OFFSET ss,SS-RIP+16*/
++ CFI_REL_OFFSET rsp,RSP-RIP+16
++ /*CFI_REL_OFFSET rflags,EFLAGS-RIP+16*/
++ /*CFI_REL_OFFSET cs,CS-RIP+16*/
++ CFI_REL_OFFSET rip,RIP-RIP+16
++ CFI_REL_OFFSET r11,8
++ CFI_REL_OFFSET rcx,0
++ movq 8(%rsp),%r11
++ CFI_RESTORE r11
++ popq %rcx
++ CFI_ADJUST_CFA_OFFSET -8
++ CFI_RESTORE rcx
++ movl %eax,%eax
++ movq %rax,(%rsp)
++ cld
++ /* note the registers are not zero extended to the sf.
++ this could be a problem. */
++ SAVE_ARGS 0,0,1
++ GET_THREAD_INFO(%r10)
++ orl $TS_COMPAT,threadinfo_status(%r10)
++ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
++ jnz ia32_tracesys
++ia32_do_syscall:
++ cmpl $(IA32_NR_syscalls-1),%eax
++ ja ia32_badsys
++ IA32_ARG_FIXUP
++ call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
++ia32_sysret:
++ movq %rax,RAX-ARGOFFSET(%rsp)
++ jmp int_ret_from_sys_call
++
++ia32_tracesys:
++ SAVE_REST
++ movq $-ENOSYS,RAX(%rsp) /* really needed? */
++ movq %rsp,%rdi /* &pt_regs -> arg1 */
++ call syscall_trace_enter
++ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
++ RESTORE_REST
++ jmp ia32_do_syscall
++END(ia32_syscall)
++
++ia32_badsys:
++ movq $0,ORIG_RAX-ARGOFFSET(%rsp)
++ movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
++ jmp int_ret_from_sys_call
++
++quiet_ni_syscall:
++ movq $-ENOSYS,%rax
++ ret
++ CFI_ENDPROC
++
++ .macro PTREGSCALL label, func, arg
++ .globl \label
++\label:
++ leaq \func(%rip),%rax
++ leaq -ARGOFFSET+8(%rsp),\arg /* 8 for return address */
++ jmp ia32_ptregs_common
++ .endm
++
++ CFI_STARTPROC32
++
++ PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
++ PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
++ PTREGSCALL stub32_sigaltstack, sys32_sigaltstack, %rdx
++ PTREGSCALL stub32_sigsuspend, sys32_sigsuspend, %rcx
++ PTREGSCALL stub32_execve, sys32_execve, %rcx
++ PTREGSCALL stub32_fork, sys_fork, %rdi
++ PTREGSCALL stub32_clone, sys32_clone, %rdx
++ PTREGSCALL stub32_vfork, sys_vfork, %rdi
++ PTREGSCALL stub32_iopl, sys_iopl, %rsi
++ PTREGSCALL stub32_rt_sigsuspend, sys_rt_sigsuspend, %rdx
++
++ENTRY(ia32_ptregs_common)
++ popq %r11
++ CFI_ENDPROC
++ CFI_STARTPROC32 simple
++ CFI_DEF_CFA rsp,SS+8-ARGOFFSET
++ CFI_REL_OFFSET rax,RAX-ARGOFFSET
++ CFI_REL_OFFSET rcx,RCX-ARGOFFSET
++ CFI_REL_OFFSET rdx,RDX-ARGOFFSET
++ CFI_REL_OFFSET rsi,RSI-ARGOFFSET
++ CFI_REL_OFFSET rdi,RDI-ARGOFFSET
++ CFI_REL_OFFSET rip,RIP-ARGOFFSET
++/* CFI_REL_OFFSET cs,CS-ARGOFFSET*/
++/* CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
++ CFI_REL_OFFSET rsp,RSP-ARGOFFSET
++/* CFI_REL_OFFSET ss,SS-ARGOFFSET*/
++ SAVE_REST
++ call *%rax
++ RESTORE_REST
++ jmp ia32_sysret /* misbalances the return cache */
++ CFI_ENDPROC
++END(ia32_ptregs_common)
++
++ .section .rodata,"a"
++ .align 8
++ia32_sys_call_table:
++ .quad sys_restart_syscall
++ .quad sys_exit
++ .quad stub32_fork
++ .quad sys_read
++ .quad sys_write
++ .quad compat_sys_open /* 5 */
++ .quad sys_close
++ .quad sys32_waitpid
++ .quad sys_creat
++ .quad sys_link
++ .quad sys_unlink /* 10 */
++ .quad stub32_execve
++ .quad sys_chdir
++ .quad compat_sys_time
++ .quad sys_mknod
++ .quad sys_chmod /* 15 */
++ .quad sys_lchown16
++ .quad quiet_ni_syscall /* old break syscall holder */
++ .quad sys_stat
++ .quad sys32_lseek
++ .quad sys_getpid /* 20 */
++ .quad compat_sys_mount /* mount */
++ .quad sys_oldumount /* old_umount */
++ .quad sys_setuid16
++ .quad sys_getuid16
++ .quad compat_sys_stime /* stime */ /* 25 */
++ .quad sys32_ptrace /* ptrace */
++ .quad sys_alarm
++ .quad sys_fstat /* (old)fstat */
++ .quad sys_pause
++ .quad compat_sys_utime /* 30 */
++ .quad quiet_ni_syscall /* old stty syscall holder */
++ .quad quiet_ni_syscall /* old gtty syscall holder */
++ .quad sys_access
++ .quad sys_nice
++ .quad quiet_ni_syscall /* 35 */ /* old ftime syscall holder */
++ .quad sys_sync
++ .quad sys32_kill
++ .quad sys_rename
++ .quad sys_mkdir
++ .quad sys_rmdir /* 40 */
++ .quad sys_dup
++ .quad sys32_pipe
++ .quad compat_sys_times
++ .quad quiet_ni_syscall /* old prof syscall holder */
++ .quad sys_brk /* 45 */
++ .quad sys_setgid16
++ .quad sys_getgid16
++ .quad sys_signal
++ .quad sys_geteuid16
++ .quad sys_getegid16 /* 50 */
++ .quad sys_acct
++ .quad sys_umount /* new_umount */
++ .quad quiet_ni_syscall /* old lock syscall holder */
++ .quad compat_sys_ioctl
++ .quad compat_sys_fcntl64 /* 55 */
++ .quad quiet_ni_syscall /* old mpx syscall holder */
++ .quad sys_setpgid
++ .quad quiet_ni_syscall /* old ulimit syscall holder */
++ .quad sys32_olduname
++ .quad sys_umask /* 60 */
++ .quad sys_chroot
++ .quad sys32_ustat
++ .quad sys_dup2
++ .quad sys_getppid
++ .quad sys_getpgrp /* 65 */
++ .quad sys_setsid
++ .quad sys32_sigaction
++ .quad sys_sgetmask
++ .quad sys_ssetmask
++ .quad sys_setreuid16 /* 70 */
++ .quad sys_setregid16
++ .quad stub32_sigsuspend
++ .quad compat_sys_sigpending
++ .quad sys_sethostname
++ .quad compat_sys_setrlimit /* 75 */
++ .quad compat_sys_old_getrlimit /* old_getrlimit */
++ .quad compat_sys_getrusage
++ .quad sys32_gettimeofday
++ .quad sys32_settimeofday
++ .quad sys_getgroups16 /* 80 */
++ .quad sys_setgroups16
++ .quad sys32_old_select
++ .quad sys_symlink
++ .quad sys_lstat
++ .quad sys_readlink /* 85 */
++#ifdef CONFIG_IA32_AOUT
++ .quad sys_uselib
++#else
++ .quad quiet_ni_syscall
++#endif
++ .quad sys_swapon
++ .quad sys_reboot
++ .quad compat_sys_old_readdir
++ .quad sys32_mmap /* 90 */
++ .quad sys_munmap
++ .quad sys_truncate
++ .quad sys_ftruncate
++ .quad sys_fchmod
++ .quad sys_fchown16 /* 95 */
++ .quad sys_getpriority
++ .quad sys_setpriority
++ .quad quiet_ni_syscall /* old profil syscall holder */
++ .quad compat_sys_statfs
++ .quad compat_sys_fstatfs /* 100 */
++ .quad sys_ioperm
++ .quad compat_sys_socketcall
++ .quad sys_syslog
++ .quad compat_sys_setitimer
++ .quad compat_sys_getitimer /* 105 */
++ .quad compat_sys_newstat
++ .quad compat_sys_newlstat
++ .quad compat_sys_newfstat
++ .quad sys32_uname
++ .quad stub32_iopl /* 110 */
++ .quad sys_vhangup
++ .quad quiet_ni_syscall /* old "idle" system call */
++ .quad sys32_vm86_warning /* vm86old */
++ .quad compat_sys_wait4
++ .quad sys_swapoff /* 115 */
++ .quad sys32_sysinfo
++ .quad sys32_ipc
++ .quad sys_fsync
++ .quad stub32_sigreturn
++ .quad stub32_clone /* 120 */
++ .quad sys_setdomainname
++ .quad sys_uname
++ .quad sys_modify_ldt
++ .quad compat_sys_adjtimex
++ .quad sys32_mprotect /* 125 */
++ .quad compat_sys_sigprocmask
++ .quad quiet_ni_syscall /* create_module */
++ .quad sys_init_module
++ .quad sys_delete_module
++ .quad quiet_ni_syscall /* 130 get_kernel_syms */
++ .quad sys_quotactl
++ .quad sys_getpgid
++ .quad sys_fchdir
++ .quad quiet_ni_syscall /* bdflush */
++ .quad sys_sysfs /* 135 */
++ .quad sys_personality
++ .quad quiet_ni_syscall /* for afs_syscall */
++ .quad sys_setfsuid16
++ .quad sys_setfsgid16
++ .quad sys_llseek /* 140 */
++ .quad compat_sys_getdents
++ .quad compat_sys_select
++ .quad sys_flock
++ .quad sys_msync
++ .quad compat_sys_readv /* 145 */
++ .quad compat_sys_writev
++ .quad sys_getsid
++ .quad sys_fdatasync
++ .quad sys32_sysctl /* sysctl */
++ .quad sys_mlock /* 150 */
++ .quad sys_munlock
++ .quad sys_mlockall
++ .quad sys_munlockall
++ .quad sys_sched_setparam
++ .quad sys_sched_getparam /* 155 */
++ .quad sys_sched_setscheduler
++ .quad sys_sched_getscheduler
++ .quad sys_sched_yield
++ .quad sys_sched_get_priority_max
++ .quad sys_sched_get_priority_min /* 160 */
++ .quad sys_sched_rr_get_interval
++ .quad compat_sys_nanosleep
++ .quad sys_mremap
++ .quad sys_setresuid16
++ .quad sys_getresuid16 /* 165 */
++ .quad sys32_vm86_warning /* vm86 */
++ .quad quiet_ni_syscall /* query_module */
++ .quad sys_poll
++ .quad compat_sys_nfsservctl
++ .quad sys_setresgid16 /* 170 */
++ .quad sys_getresgid16
++ .quad sys_prctl
++ .quad stub32_rt_sigreturn
++ .quad sys32_rt_sigaction
++ .quad sys32_rt_sigprocmask /* 175 */
++ .quad sys32_rt_sigpending
++ .quad compat_sys_rt_sigtimedwait
++ .quad sys32_rt_sigqueueinfo
++ .quad stub32_rt_sigsuspend
++ .quad sys32_pread /* 180 */
++ .quad sys32_pwrite
++ .quad sys_chown16
++ .quad sys_getcwd
++ .quad sys_capget
++ .quad sys_capset
++ .quad stub32_sigaltstack
++ .quad sys32_sendfile
++ .quad quiet_ni_syscall /* streams1 */
++ .quad quiet_ni_syscall /* streams2 */
++ .quad stub32_vfork /* 190 */
++ .quad compat_sys_getrlimit
++ .quad sys32_mmap2
++ .quad sys32_truncate64
++ .quad sys32_ftruncate64
++ .quad sys32_stat64 /* 195 */
++ .quad sys32_lstat64
++ .quad sys32_fstat64
++ .quad sys_lchown
++ .quad sys_getuid
++ .quad sys_getgid /* 200 */
++ .quad sys_geteuid
++ .quad sys_getegid
++ .quad sys_setreuid
++ .quad sys_setregid
++ .quad sys_getgroups /* 205 */
++ .quad sys_setgroups
++ .quad sys_fchown
++ .quad sys_setresuid
++ .quad sys_getresuid
++ .quad sys_setresgid /* 210 */
++ .quad sys_getresgid
++ .quad sys_chown
++ .quad sys_setuid
++ .quad sys_setgid
++ .quad sys_setfsuid /* 215 */
++ .quad sys_setfsgid
++ .quad sys_pivot_root
++ .quad sys_mincore
++ .quad sys_madvise
++ .quad compat_sys_getdents64 /* 220 getdents64 */
++ .quad compat_sys_fcntl64
++ .quad quiet_ni_syscall /* tux */
++ .quad quiet_ni_syscall /* security */
++ .quad sys_gettid
++ .quad sys_readahead /* 225 */
++ .quad sys_setxattr
++ .quad sys_lsetxattr
++ .quad sys_fsetxattr
++ .quad sys_getxattr
++ .quad sys_lgetxattr /* 230 */
++ .quad sys_fgetxattr
++ .quad sys_listxattr
++ .quad sys_llistxattr
++ .quad sys_flistxattr
++ .quad sys_removexattr /* 235 */
++ .quad sys_lremovexattr
++ .quad sys_fremovexattr
++ .quad sys_tkill
++ .quad sys_sendfile64
++ .quad compat_sys_futex /* 240 */
++ .quad compat_sys_sched_setaffinity
++ .quad compat_sys_sched_getaffinity
++ .quad sys32_set_thread_area
++ .quad sys32_get_thread_area
++ .quad compat_sys_io_setup /* 245 */
++ .quad sys_io_destroy
++ .quad compat_sys_io_getevents
++ .quad compat_sys_io_submit
++ .quad sys_io_cancel
++ .quad sys_fadvise64 /* 250 */
++ .quad quiet_ni_syscall /* free_huge_pages */
++ .quad sys_exit_group
++ .quad sys32_lookup_dcookie
++ .quad sys_epoll_create
++ .quad sys_epoll_ctl /* 255 */
++ .quad sys_epoll_wait
++ .quad sys_remap_file_pages
++ .quad sys_set_tid_address
++ .quad compat_sys_timer_create
++ .quad compat_sys_timer_settime /* 260 */
++ .quad compat_sys_timer_gettime
++ .quad sys_timer_getoverrun
++ .quad sys_timer_delete
++ .quad compat_sys_clock_settime
++ .quad compat_sys_clock_gettime /* 265 */
++ .quad compat_sys_clock_getres
++ .quad compat_sys_clock_nanosleep
++ .quad compat_sys_statfs64
++ .quad compat_sys_fstatfs64
++ .quad sys_tgkill /* 270 */
++ .quad compat_sys_utimes
++ .quad sys32_fadvise64_64
++ .quad quiet_ni_syscall /* sys_vserver */
++ .quad sys_mbind
++ .quad compat_sys_get_mempolicy /* 275 */
++ .quad sys_set_mempolicy
++ .quad compat_sys_mq_open
++ .quad sys_mq_unlink
++ .quad compat_sys_mq_timedsend
++ .quad compat_sys_mq_timedreceive /* 280 */
++ .quad compat_sys_mq_notify
++ .quad compat_sys_mq_getsetattr
++ .quad compat_sys_kexec_load /* reserved for kexec */
++ .quad compat_sys_waitid
++ .quad quiet_ni_syscall /* 285: sys_altroot */
++ .quad sys_add_key
++ .quad sys_request_key
++ .quad sys_keyctl
++ .quad sys_ioprio_set
++ .quad sys_ioprio_get /* 290 */
++ .quad sys_inotify_init
++ .quad sys_inotify_add_watch
++ .quad sys_inotify_rm_watch
++ .quad sys_migrate_pages
++ .quad compat_sys_openat /* 295 */
++ .quad sys_mkdirat
++ .quad sys_mknodat
++ .quad sys_fchownat
++ .quad compat_sys_futimesat
++ .quad sys32_fstatat /* 300 */
++ .quad sys_unlinkat
++ .quad sys_renameat
++ .quad sys_linkat
++ .quad sys_symlinkat
++ .quad sys_readlinkat /* 305 */
++ .quad sys_fchmodat
++ .quad sys_faccessat
++ .quad quiet_ni_syscall /* pselect6 for now */
++ .quad quiet_ni_syscall /* ppoll for now */
++ .quad sys_unshare /* 310 */
++ .quad compat_sys_set_robust_list
++ .quad compat_sys_get_robust_list
++ .quad sys_splice
++ .quad sys_sync_file_range
++ .quad sys_tee
++ .quad compat_sys_vmsplice
++ .quad compat_sys_move_pages
++ia32_syscall_end:
+Index: head-2008-11-25/arch/x86/kernel/acpi/sleep_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/acpi/sleep_64-xen.c 2008-04-15 09:29:41.000000000 +0200
+@@ -0,0 +1,146 @@
++/*
++ * acpi.c - Architecture-Specific Low-Level ACPI Support
++ *
++ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
++ * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
++ * Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
++ * Copyright (C) 2002 Andi Kleen, SuSE Labs (x86-64 port)
++ * Copyright (C) 2003 Pavel Machek, SuSE Labs
++ *
++ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/types.h>
++#include <linux/stddef.h>
++#include <linux/slab.h>
++#include <linux/pci.h>
++#include <linux/bootmem.h>
++#include <linux/acpi.h>
++#include <linux/cpumask.h>
++
++#include <asm/mpspec.h>
++#include <asm/io.h>
++#include <asm/apic.h>
++#include <asm/apicdef.h>
++#include <asm/page.h>
++#include <asm/pgtable.h>
++#include <asm/pgalloc.h>
++#include <asm/io_apic.h>
++#include <asm/proto.h>
++#include <asm/tlbflush.h>
++
++/* --------------------------------------------------------------------------
++ Low-Level Sleep Support
++ -------------------------------------------------------------------------- */
++
++#ifdef CONFIG_ACPI_SLEEP
++
++#ifndef CONFIG_ACPI_PV_SLEEP
++/* address in low memory of the wakeup routine. */
++unsigned long acpi_wakeup_address = 0;
++unsigned long acpi_video_flags;
++extern char wakeup_start, wakeup_end;
++
++extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
++
++static pgd_t low_ptr;
++
++static void init_low_mapping(void)
++{
++ pgd_t *slot0 = pgd_offset(current->mm, 0UL);
++ low_ptr = *slot0;
++ set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET));
++ WARN_ON(num_online_cpus() != 1);
++ local_flush_tlb();
++}
++#endif
++
++/**
++ * acpi_save_state_mem - save kernel state
++ *
++ * Create an identity mapped page table and copy the wakeup routine to
++ * low memory.
++ */
++int acpi_save_state_mem(void)
++{
++#ifndef CONFIG_ACPI_PV_SLEEP
++ init_low_mapping();
++
++ memcpy((void *)acpi_wakeup_address, &wakeup_start,
++ &wakeup_end - &wakeup_start);
++ acpi_copy_wakeup_routine(acpi_wakeup_address);
++#endif
++ return 0;
++}
++
++/*
++ * acpi_restore_state
++ */
++void acpi_restore_state_mem(void)
++{
++#ifndef CONFIG_ACPI_PV_SLEEP
++ set_pgd(pgd_offset(current->mm, 0UL), low_ptr);
++ local_flush_tlb();
++#endif
++}
++
++/**
++ * acpi_reserve_bootmem - do _very_ early ACPI initialisation
++ *
++ * We allocate a page in low memory for the wakeup
++ * routine for when we come back from a sleep state. The
++ * runtime allocator allows specification of <16M pages, but not
++ * <1M pages.
++ */
++void __init acpi_reserve_bootmem(void)
++{
++#ifndef CONFIG_ACPI_PV_SLEEP
++ acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE);
++ if ((&wakeup_end - &wakeup_start) > PAGE_SIZE)
++ printk(KERN_CRIT
++ "ACPI: Wakeup code way too big, will crash on attempt to suspend\n");
++#endif
++}
++
++#ifndef CONFIG_ACPI_PV_SLEEP
++static int __init acpi_sleep_setup(char *str)
++{
++ while ((str != NULL) && (*str != '\0')) {
++ if (strncmp(str, "s3_bios", 7) == 0)
++ acpi_video_flags = 1;
++ if (strncmp(str, "s3_mode", 7) == 0)
++ acpi_video_flags |= 2;
++ str = strchr(str, ',');
++ if (str != NULL)
++ str += strspn(str, ", \t");
++ }
++
++ return 1;
++}
++
++__setup("acpi_sleep=", acpi_sleep_setup);
++#endif /* CONFIG_ACPI_PV_SLEEP */
++
++#endif /*CONFIG_ACPI_SLEEP */
++
++void acpi_pci_link_exit(void)
++{
++}
+Index: head-2008-11-25/arch/x86/kernel/apic_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/apic_64-xen.c 2007-06-12 13:13:01.000000000 +0200
+@@ -0,0 +1,197 @@
++/*
++ * Local APIC handling, local APIC timers
++ *
++ * (c) 1999, 2000 Ingo Molnar <mingo@redhat.com>
++ *
++ * Fixes
++ * Maciej W. Rozycki : Bits for genuine 82489DX APICs;
++ * thanks to Eric Gilmore
++ * and Rolf G. Tews
++ * for testing these extensively.
++ * Maciej W. Rozycki : Various updates and fixes.
++ * Mikael Pettersson : Power Management for UP-APIC.
++ * Pavel Machek and
++ * Mikael Pettersson : PM converted to driver model.
++ */
++
++#include <linux/init.h>
++
++#include <linux/mm.h>
++#include <linux/delay.h>
++#include <linux/bootmem.h>
++#include <linux/smp_lock.h>
++#include <linux/interrupt.h>
++#include <linux/mc146818rtc.h>
++#include <linux/kernel_stat.h>
++#include <linux/sysdev.h>
++#include <linux/module.h>
++
++#include <asm/atomic.h>
++#include <asm/smp.h>
++#include <asm/mtrr.h>
++#include <asm/mpspec.h>
++#include <asm/desc.h>
++#include <asm/arch_hooks.h>
++#include <asm/hpet.h>
++#include <asm/idle.h>
++
++int apic_verbosity;
++
++/*
++ * 'what should we do if we get a hw irq event on an illegal vector'.
++ * each architecture has to answer this themselves.
++ */
++void ack_bad_irq(unsigned int irq)
++{
++ printk("unexpected IRQ trap at vector %02x\n", irq);
++ /*
++ * Currently unexpected vectors happen only on SMP and APIC.
++ * We _must_ ack these because every local APIC has only N
++ * irq slots per priority level, and a 'hanging, unacked' IRQ
++ * holds up an irq slot - in excessive cases (when multiple
++ * unexpected vectors occur) that might lock up the APIC
++ * completely.
++ * But don't ack when the APIC is disabled. -AK
++ */
++ if (!disable_apic)
++ ack_APIC_irq();
++}
++
++int setup_profiling_timer(unsigned int multiplier)
++{
++ return -EINVAL;
++}
++
++void smp_local_timer_interrupt(struct pt_regs *regs)
++{
++ profile_tick(CPU_PROFILING, regs);
++#ifndef CONFIG_XEN
++#ifdef CONFIG_SMP
++ update_process_times(user_mode(regs));
++#endif
++#endif
++ /*
++ * We take the 'long' return path, and there every subsystem
++ * grabs the appropriate locks (kernel lock/ irq lock).
++ *
++ * we might want to decouple profiling from the 'long path',
++ * and do the profiling totally in assembly.
++ *
++ * Currently this isn't too much of an issue (performance wise),
++ * we can take more than 100K local irqs per second on a 100 MHz P5.
++ */
++}
++
++/*
++ * Local APIC timer interrupt. This is the most natural way for doing
++ * local interrupts, but local timer interrupts can be emulated by
++ * broadcast interrupts too. [in case the hw doesn't support APIC timers]
++ *
++ * [ if a single-CPU system runs an SMP kernel then we call the local
++ * interrupt as well. Thus we cannot inline the local irq ... ]
++ */
++void smp_apic_timer_interrupt(struct pt_regs *regs)
++{
++ /*
++ * the NMI deadlock-detector uses this.
++ */
++ add_pda(apic_timer_irqs, 1);
++
++ /*
++ * NOTE! We'd better ACK the irq immediately,
++ * because timer handling can be slow.
++ */
++ ack_APIC_irq();
++ /*
++ * update_process_times() expects us to have done irq_enter().
++ * Besides, if we don't timer interrupts ignore the global
++ * interrupt lock, which is the WrongThing (tm) to do.
++ */
++ exit_idle();
++ irq_enter();
++ smp_local_timer_interrupt(regs);
++ irq_exit();
++}
++
++/*
++ * This interrupt should _never_ happen with our APIC/SMP architecture
++ */
++asmlinkage void smp_spurious_interrupt(void)
++{
++ unsigned int v;
++ exit_idle();
++ irq_enter();
++ /*
++ * Check if this really is a spurious interrupt and ACK it
++ * if it is a vectored one. Just in case...
++ * Spurious interrupts should not be ACKed.
++ */
++ v = apic_read(APIC_ISR + ((SPURIOUS_APIC_VECTOR & ~0x1f) >> 1));
++ if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
++ ack_APIC_irq();
++
++#if 0
++ static unsigned long last_warning;
++ static unsigned long skipped;
++
++ /* see sw-dev-man vol 3, chapter 7.4.13.5 */
++ if (time_before(last_warning+30*HZ,jiffies)) {
++ printk(KERN_INFO "spurious APIC interrupt on CPU#%d, %ld skipped.\n",
++ smp_processor_id(), skipped);
++ last_warning = jiffies;
++ skipped = 0;
++ } else {
++ skipped++;
++ }
++#endif
++ irq_exit();
++}
++
++/*
++ * This interrupt should never happen with our APIC/SMP architecture
++ */
++
++asmlinkage void smp_error_interrupt(void)
++{
++ unsigned int v, v1;
++
++ exit_idle();
++ irq_enter();
++ /* First tickle the hardware, only then report what went on. -- REW */
++ v = apic_read(APIC_ESR);
++ apic_write(APIC_ESR, 0);
++ v1 = apic_read(APIC_ESR);
++ ack_APIC_irq();
++ atomic_inc(&irq_err_count);
++
++ /* Here is what the APIC error bits mean:
++ 0: Send CS error
++ 1: Receive CS error
++ 2: Send accept error
++ 3: Receive accept error
++ 4: Reserved
++ 5: Send illegal vector
++ 6: Received illegal vector
++ 7: Illegal register address
++ */
++ printk (KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
++ smp_processor_id(), v , v1);
++ irq_exit();
++}
++
++int disable_apic;
++
++/*
++ * This initializes the IO-APIC and APIC hardware if this is
++ * a UP kernel.
++ */
++int __init APIC_init_uniprocessor (void)
++{
++#ifdef CONFIG_X86_IO_APIC
++ if (smp_found_config)
++ if (!skip_ioapic_setup && nr_ioapics)
++ setup_IO_APIC();
++#endif
++
++ return 1;
++}
+Index: head-2008-11-25/arch/x86/kernel/e820_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/e820_64-xen.c 2008-04-22 19:56:27.000000000 +0200
+@@ -0,0 +1,798 @@
++/*
++ * Handle the memory map.
++ * The functions here do the job until bootmem takes over.
++ *
++ * Getting sanitize_e820_map() in sync with i386 version by applying change:
++ * - Provisions for empty E820 memory regions (reported by certain BIOSes).
++ * Alex Achenbach <xela@slit.de>, December 2002.
++ * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
++ *
++ */
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/init.h>
++#include <linux/bootmem.h>
++#include <linux/ioport.h>
++#include <linux/string.h>
++#include <linux/kexec.h>
++#include <linux/module.h>
++
++#include <asm/pgtable.h>
++#include <asm/page.h>
++#include <asm/e820.h>
++#include <asm/proto.h>
++#include <asm/bootsetup.h>
++#include <asm/sections.h>
++#include <xen/interface/memory.h>
++
++/*
++ * PFN of last memory page.
++ */
++unsigned long end_pfn;
++EXPORT_SYMBOL(end_pfn);
++
++/*
++ * end_pfn only includes RAM, while end_pfn_map includes all e820 entries.
++ * The direct mapping extends to end_pfn_map, so that we can directly access
++ * apertures, ACPI and other tables without having to play with fixmaps.
++ */
++unsigned long end_pfn_map;
++
++/*
++ * Last pfn which the user wants to use.
++ */
++unsigned long end_user_pfn = MAXMEM>>PAGE_SHIFT;
++
++extern struct resource code_resource, data_resource;
++
++#ifdef CONFIG_XEN
++extern struct e820map machine_e820;
++#endif
++
++/* Check for some hardcoded bad areas that early boot is not allowed to touch */
++static inline int bad_addr(unsigned long *addrp, unsigned long size)
++{
++ unsigned long addr = *addrp, last = addr + size;
++
++#ifndef CONFIG_XEN
++ /* various gunk below that needed for SMP startup */
++ if (addr < 0x8000) {
++ *addrp = 0x8000;
++ return 1;
++ }
++
++ /* direct mapping tables of the kernel */
++ if (last >= table_start<<PAGE_SHIFT && addr < table_end<<PAGE_SHIFT) {
++ *addrp = table_end << PAGE_SHIFT;
++ return 1;
++ }
++
++ /* initrd */
++#ifdef CONFIG_BLK_DEV_INITRD
++ if (LOADER_TYPE && INITRD_START && last >= INITRD_START &&
++ addr < INITRD_START+INITRD_SIZE) {
++ *addrp = INITRD_START + INITRD_SIZE;
++ return 1;
++ }
++#endif
++ /* kernel code + 640k memory hole (later should not be needed, but
++ be paranoid for now) */
++ if (last >= 640*1024 && addr < 1024*1024) {
++ *addrp = 1024*1024;
++ return 1;
++ }
++ if (last >= __pa_symbol(&_text) && last < __pa_symbol(&_end)) {
++ *addrp = __pa_symbol(&_end);
++ return 1;
++ }
++
++ if (last >= ebda_addr && addr < ebda_addr + ebda_size) {
++ *addrp = ebda_addr + ebda_size;
++ return 1;
++ }
++
++ /* XXX ramdisk image here? */
++#else
++ if (last < (table_end<<PAGE_SHIFT)) {
++ *addrp = table_end << PAGE_SHIFT;
++ return 1;
++ }
++#endif
++ return 0;
++}
++
++/*
++ * This function checks if any part of the range <start,end> is mapped
++ * with type.
++ */
++int e820_any_mapped(unsigned long start, unsigned long end, unsigned type)
++{
++ int i;
++
++#ifndef CONFIG_XEN
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++#else
++ if (!is_initial_xendomain())
++ return 0;
++ for (i = 0; i < machine_e820.nr_map; i++) {
++ const struct e820entry *ei = &machine_e820.map[i];
++#endif
++
++ if (type && ei->type != type)
++ continue;
++ if (ei->addr >= end || ei->addr + ei->size <= start)
++ continue;
++ return 1;
++ }
++ return 0;
++}
++EXPORT_SYMBOL_GPL(e820_any_mapped);
++
++/*
++ * This function checks if the entire range <start,end> is mapped with type.
++ *
++ * Note: this function only works correct if the e820 table is sorted and
++ * not-overlapping, which is the case
++ */
++int __init e820_all_mapped(unsigned long start, unsigned long end, unsigned type)
++{
++ int i;
++
++#ifndef CONFIG_XEN
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++#else
++ if (!is_initial_xendomain())
++ return 0;
++ for (i = 0; i < machine_e820.nr_map; i++) {
++ const struct e820entry *ei = &machine_e820.map[i];
++#endif
++
++ if (type && ei->type != type)
++ continue;
++ /* is the region (part) in overlap with the current region ?*/
++ if (ei->addr >= end || ei->addr + ei->size <= start)
++ continue;
++
++ /* if the region is at the beginning of <start,end> we move
++ * start to the end of the region since it's ok until there
++ */
++ if (ei->addr <= start)
++ start = ei->addr + ei->size;
++ /* if start is now at or beyond end, we're done, full coverage */
++ if (start >= end)
++ return 1; /* we're done */
++ }
++ return 0;
++}
++
++/*
++ * Find a free area in a specific range.
++ */
++unsigned long __init find_e820_area(unsigned long start, unsigned long end, unsigned size)
++{
++ int i;
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ unsigned long addr = ei->addr, last;
++ if (ei->type != E820_RAM)
++ continue;
++ if (addr < start)
++ addr = start;
++ if (addr > ei->addr + ei->size)
++ continue;
++ while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size)
++ ;
++ last = addr + size;
++ if (last > ei->addr + ei->size)
++ continue;
++ if (last > end)
++ continue;
++ return addr;
++ }
++ return -1UL;
++}
++
++/*
++ * Free bootmem based on the e820 table for a node.
++ */
++void __init e820_bootmem_free(pg_data_t *pgdat, unsigned long start,unsigned long end)
++{
++ int i;
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ unsigned long last, addr;
++
++ if (ei->type != E820_RAM ||
++ ei->addr+ei->size <= start ||
++ ei->addr >= end)
++ continue;
++
++ addr = round_up(ei->addr, PAGE_SIZE);
++ if (addr < start)
++ addr = start;
++
++ last = round_down(ei->addr + ei->size, PAGE_SIZE);
++ if (last >= end)
++ last = end;
++
++ if (last > addr && last-addr >= PAGE_SIZE)
++ free_bootmem_node(pgdat, addr, last-addr);
++ }
++}
++
++/*
++ * Find the highest page frame number we have available
++ */
++unsigned long __init e820_end_of_ram(void)
++{
++ int i;
++ unsigned long end_pfn = 0;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ unsigned long start, end;
++
++ start = round_up(ei->addr, PAGE_SIZE);
++ end = round_down(ei->addr + ei->size, PAGE_SIZE);
++ if (start >= end)
++ continue;
++ if (ei->type == E820_RAM) {
++ if (end > end_pfn<<PAGE_SHIFT)
++ end_pfn = end>>PAGE_SHIFT;
++ } else {
++ if (end > end_pfn_map<<PAGE_SHIFT)
++ end_pfn_map = end>>PAGE_SHIFT;
++ }
++ }
++
++ if (end_pfn > end_pfn_map)
++ end_pfn_map = end_pfn;
++ if (end_pfn_map > MAXMEM>>PAGE_SHIFT)
++ end_pfn_map = MAXMEM>>PAGE_SHIFT;
++ if (end_pfn > end_user_pfn)
++ end_pfn = end_user_pfn;
++ if (end_pfn > end_pfn_map)
++ end_pfn = end_pfn_map;
++
++ return end_pfn;
++}
++
++/*
++ * Compute how much memory is missing in a range.
++ * Unlike the other functions in this file the arguments are in page numbers.
++ */
++unsigned long __init
++e820_hole_size(unsigned long start_pfn, unsigned long end_pfn)
++{
++ unsigned long ram = 0;
++ unsigned long start = start_pfn << PAGE_SHIFT;
++ unsigned long end = end_pfn << PAGE_SHIFT;
++ int i;
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ unsigned long last, addr;
++
++ if (ei->type != E820_RAM ||
++ ei->addr+ei->size <= start ||
++ ei->addr >= end)
++ continue;
++
++ addr = round_up(ei->addr, PAGE_SIZE);
++ if (addr < start)
++ addr = start;
++
++ last = round_down(ei->addr + ei->size, PAGE_SIZE);
++ if (last >= end)
++ last = end;
++
++ if (last > addr)
++ ram += last - addr;
++ }
++ return ((end - start) - ram) >> PAGE_SHIFT;
++}
++
++/*
++ * Mark e820 reserved areas as busy for the resource manager.
++ */
++void __init e820_reserve_resources(struct e820entry *e820, int nr_map)
++{
++ int i;
++ for (i = 0; i < nr_map; i++) {
++ struct resource *res;
++ res = alloc_bootmem_low(sizeof(struct resource));
++ switch (e820[i].type) {
++ case E820_RAM: res->name = "System RAM"; break;
++ case E820_ACPI: res->name = "ACPI Tables"; break;
++ case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
++ default: res->name = "reserved";
++ }
++ res->start = e820[i].addr;
++ res->end = res->start + e820[i].size - 1;
++ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
++ request_resource(&iomem_resource, res);
++ if (e820[i].type == E820_RAM) {
++ /*
++ * We don't know which RAM region contains kernel data,
++ * so we try it repeatedly and let the resource manager
++ * test it.
++ */
++#ifndef CONFIG_XEN
++ request_resource(res, &code_resource);
++ request_resource(res, &data_resource);
++#endif
++#ifdef CONFIG_KEXEC
++ if (crashk_res.start != crashk_res.end)
++ request_resource(res, &crashk_res);
++#ifdef CONFIG_XEN
++ xen_machine_kexec_register_resources(res);
++#endif
++#endif
++ }
++ }
++}
++
++/*
++ * Add a memory region to the kernel e820 map.
++ */
++void __init add_memory_region(unsigned long start, unsigned long size, int type)
++{
++ int x = e820.nr_map;
++
++ if (x == E820MAX) {
++ printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
++ return;
++ }
++
++ e820.map[x].addr = start;
++ e820.map[x].size = size;
++ e820.map[x].type = type;
++ e820.nr_map++;
++}
++
++void __init e820_print_map(char *who)
++{
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ printk(" %s: %016Lx - %016Lx ", who,
++ (unsigned long long) e820.map[i].addr,
++ (unsigned long long) (e820.map[i].addr + e820.map[i].size));
++ switch (e820.map[i].type) {
++ case E820_RAM: printk("(usable)\n");
++ break;
++ case E820_RESERVED:
++ printk("(reserved)\n");
++ break;
++ case E820_ACPI:
++ printk("(ACPI data)\n");
++ break;
++ case E820_NVS:
++ printk("(ACPI NVS)\n");
++ break;
++ default: printk("type %u\n", e820.map[i].type);
++ break;
++ }
++ }
++}
++
++/*
++ * Sanitize the BIOS e820 map.
++ *
++ * Some e820 responses include overlapping entries. The following
++ * replaces the original e820 map with a new one, removing overlaps.
++ *
++ */
++static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
++{
++ struct change_member {
++ struct e820entry *pbios; /* pointer to original bios entry */
++ unsigned long long addr; /* address for this change point */
++ };
++ static struct change_member change_point_list[2*E820MAX] __initdata;
++ static struct change_member *change_point[2*E820MAX] __initdata;
++ static struct e820entry *overlap_list[E820MAX] __initdata;
++ static struct e820entry new_bios[E820MAX] __initdata;
++ struct change_member *change_tmp;
++ unsigned long current_type, last_type;
++ unsigned long long last_addr;
++ int chgidx, still_changing;
++ int overlap_entries;
++ int new_bios_entry;
++ int old_nr, new_nr, chg_nr;
++ int i;
++
++ /*
++ Visually we're performing the following (1,2,3,4 = memory types)...
++
++ Sample memory map (w/overlaps):
++ ____22__________________
++ ______________________4_
++ ____1111________________
++ _44_____________________
++ 11111111________________
++ ____________________33__
++ ___________44___________
++ __________33333_________
++ ______________22________
++ ___________________2222_
++ _________111111111______
++ _____________________11_
++ _________________4______
++
++ Sanitized equivalent (no overlap):
++ 1_______________________
++ _44_____________________
++ ___1____________________
++ ____22__________________
++ ______11________________
++ _________1______________
++ __________3_____________
++ ___________44___________
++ _____________33_________
++ _______________2________
++ ________________1_______
++ _________________4______
++ ___________________2____
++ ____________________33__
++ ______________________4_
++ */
++
++ /* if there's only one memory region, don't bother */
++ if (*pnr_map < 2)
++ return -1;
++
++ old_nr = *pnr_map;
++
++ /* bail out if we find any unreasonable addresses in bios map */
++ for (i=0; i<old_nr; i++)
++ if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
++ return -1;
++
++ /* create pointers for initial change-point information (for sorting) */
++ for (i=0; i < 2*old_nr; i++)
++ change_point[i] = &change_point_list[i];
++
++ /* record all known change-points (starting and ending addresses),
++ omitting those that are for empty memory regions */
++ chgidx = 0;
++ for (i=0; i < old_nr; i++) {
++ if (biosmap[i].size != 0) {
++ change_point[chgidx]->addr = biosmap[i].addr;
++ change_point[chgidx++]->pbios = &biosmap[i];
++ change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
++ change_point[chgidx++]->pbios = &biosmap[i];
++ }
++ }
++ chg_nr = chgidx;
++
++ /* sort change-point list by memory addresses (low -> high) */
++ still_changing = 1;
++ while (still_changing) {
++ still_changing = 0;
++ for (i=1; i < chg_nr; i++) {
++ /* if <current_addr> > <last_addr>, swap */
++ /* or, if current=<start_addr> & last=<end_addr>, swap */
++ if ((change_point[i]->addr < change_point[i-1]->addr) ||
++ ((change_point[i]->addr == change_point[i-1]->addr) &&
++ (change_point[i]->addr == change_point[i]->pbios->addr) &&
++ (change_point[i-1]->addr != change_point[i-1]->pbios->addr))
++ )
++ {
++ change_tmp = change_point[i];
++ change_point[i] = change_point[i-1];
++ change_point[i-1] = change_tmp;
++ still_changing=1;
++ }
++ }
++ }
++
++ /* create a new bios memory map, removing overlaps */
++ overlap_entries=0; /* number of entries in the overlap table */
++ new_bios_entry=0; /* index for creating new bios map entries */
++ last_type = 0; /* start with undefined memory type */
++ last_addr = 0; /* start with 0 as last starting address */
++ /* loop through change-points, determining affect on the new bios map */
++ for (chgidx=0; chgidx < chg_nr; chgidx++)
++ {
++ /* keep track of all overlapping bios entries */
++ if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
++ {
++ /* add map entry to overlap list (> 1 entry implies an overlap) */
++ overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
++ }
++ else
++ {
++ /* remove entry from list (order independent, so swap with last) */
++ for (i=0; i<overlap_entries; i++)
++ {
++ if (overlap_list[i] == change_point[chgidx]->pbios)
++ overlap_list[i] = overlap_list[overlap_entries-1];
++ }
++ overlap_entries--;
++ }
++ /* if there are overlapping entries, decide which "type" to use */
++ /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
++ current_type = 0;
++ for (i=0; i<overlap_entries; i++)
++ if (overlap_list[i]->type > current_type)
++ current_type = overlap_list[i]->type;
++ /* continue building up new bios map based on this information */
++ if (current_type != last_type) {
++ if (last_type != 0) {
++ new_bios[new_bios_entry].size =
++ change_point[chgidx]->addr - last_addr;
++ /* move forward only if the new size was non-zero */
++ if (new_bios[new_bios_entry].size != 0)
++ if (++new_bios_entry >= E820MAX)
++ break; /* no more space left for new bios entries */
++ }
++ if (current_type != 0) {
++ new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
++ new_bios[new_bios_entry].type = current_type;
++ last_addr=change_point[chgidx]->addr;
++ }
++ last_type = current_type;
++ }
++ }
++ new_nr = new_bios_entry; /* retain count for new bios entries */
++
++ /* copy new bios mapping into original location */
++ memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
++ *pnr_map = new_nr;
++
++ return 0;
++}
++
++/*
++ * Copy the BIOS e820 map into a safe place.
++ *
++ * Sanity-check it while we're at it..
++ *
++ * If we're lucky and live on a modern system, the setup code
++ * will have given us a memory map that we can use to properly
++ * set up memory. If we aren't, we'll fake a memory map.
++ *
++ * We check to see that the memory map contains at least 2 elements
++ * before we'll use it, because the detection code in setup.S may
++ * not be perfect and most every PC known to man has two memory
++ * regions: one from 0 to 640k, and one from 1mb up. (The IBM
++ * thinkpad 560x, for example, does not cooperate with the memory
++ * detection code.)
++ */
++static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
++{
++#ifndef CONFIG_XEN
++ /* Only one memory region (or negative)? Ignore it */
++ if (nr_map < 2)
++ return -1;
++#else
++ BUG_ON(nr_map < 1);
++#endif
++
++ do {
++ unsigned long start = biosmap->addr;
++ unsigned long size = biosmap->size;
++ unsigned long end = start + size;
++ unsigned long type = biosmap->type;
++
++ /* Overflow in 64 bits? Ignore the memory map. */
++ if (start > end)
++ return -1;
++
++#ifndef CONFIG_XEN
++ /*
++ * Some BIOSes claim RAM in the 640k - 1M region.
++ * Not right. Fix it up.
++ *
++ * This should be removed on Hammer which is supposed to not
++ * have non e820 covered ISA mappings there, but I had some strange
++ * problems so it stays for now. -AK
++ */
++ if (type == E820_RAM) {
++ if (start < 0x100000ULL && end > 0xA0000ULL) {
++ if (start < 0xA0000ULL)
++ add_memory_region(start, 0xA0000ULL-start, type);
++ if (end <= 0x100000ULL)
++ continue;
++ start = 0x100000ULL;
++ size = end - start;
++ }
++ }
++#endif
++
++ add_memory_region(start, size, type);
++ } while (biosmap++,--nr_map);
++
++#ifdef CONFIG_XEN
++ if (is_initial_xendomain()) {
++ struct xen_memory_map memmap;
++
++ memmap.nr_entries = E820MAX;
++ set_xen_guest_handle(memmap.buffer, machine_e820.map);
++
++ if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
++ BUG();
++ machine_e820.nr_map = memmap.nr_entries;
++ } else
++ machine_e820 = e820;
++#endif
++
++ return 0;
++}
++
++#ifndef CONFIG_XEN
++void __init setup_memory_region(void)
++{
++ char *who = "BIOS-e820";
++
++ /*
++ * Try to copy the BIOS-supplied E820-map.
++ *
++ * Otherwise fake a memory map; one section from 0k->640k,
++ * the next section from 1mb->appropriate_mem_k
++ */
++ sanitize_e820_map(E820_MAP, &E820_MAP_NR);
++ if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
++ unsigned long mem_size;
++
++ /* compare results from other methods and take the greater */
++ if (ALT_MEM_K < EXT_MEM_K) {
++ mem_size = EXT_MEM_K;
++ who = "BIOS-88";
++ } else {
++ mem_size = ALT_MEM_K;
++ who = "BIOS-e801";
++ }
++
++ e820.nr_map = 0;
++ add_memory_region(0, LOWMEMSIZE(), E820_RAM);
++ add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
++ }
++ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
++ e820_print_map(who);
++}
++
++#else /* CONFIG_XEN */
++
++void __init setup_memory_region(void)
++{
++ int rc;
++ struct xen_memory_map memmap;
++ /*
++ * This is rather large for a stack variable but this early in
++ * the boot process we know we have plenty slack space.
++ */
++ struct e820entry map[E820MAX];
++
++ memmap.nr_entries = E820MAX;
++ set_xen_guest_handle(memmap.buffer, map);
++
++ rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
++ if ( rc == -ENOSYS ) {
++ memmap.nr_entries = 1;
++ map[0].addr = 0ULL;
++ map[0].size = xen_start_info->nr_pages << PAGE_SHIFT;
++ /* 8MB slack (to balance backend allocations). */
++ map[0].size += 8 << 20;
++ map[0].type = E820_RAM;
++ rc = 0;
++ }
++ BUG_ON(rc);
++
++ sanitize_e820_map(map, (char *)&memmap.nr_entries);
++
++ BUG_ON(copy_e820_map(map, (char)memmap.nr_entries) < 0);
++
++ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
++ e820_print_map("Xen");
++}
++#endif
++
++void __init parse_memopt(char *p, char **from)
++{
++ int i;
++ unsigned long current_end;
++ unsigned long end;
++
++ end_user_pfn = memparse(p, from);
++ end_user_pfn >>= PAGE_SHIFT;
++
++ end = end_user_pfn<<PAGE_SHIFT;
++ i = e820.nr_map-1;
++ current_end = e820.map[i].addr + e820.map[i].size;
++
++ if (current_end < end) {
++ /*
++ * The e820 map ends before our requested size so
++ * extend the final entry to the requested address.
++ */
++ if (e820.map[i].type == E820_RAM)
++ e820.map[i].size = end - e820.map[i].addr;
++ else
++ add_memory_region(current_end, end - current_end, E820_RAM);
++ }
++}
++
++void __init parse_memmapopt(char *p, char **from)
++{
++ unsigned long long start_at, mem_size;
++
++ mem_size = memparse(p, from);
++ p = *from;
++ if (*p == '@') {
++ start_at = memparse(p+1, from);
++ add_memory_region(start_at, mem_size, E820_RAM);
++ } else if (*p == '#') {
++ start_at = memparse(p+1, from);
++ add_memory_region(start_at, mem_size, E820_ACPI);
++ } else if (*p == '$') {
++ start_at = memparse(p+1, from);
++ add_memory_region(start_at, mem_size, E820_RESERVED);
++ } else {
++ end_user_pfn = (mem_size >> PAGE_SHIFT);
++ }
++ p = *from;
++}
++
++unsigned long pci_mem_start = 0xaeedbabe;
++EXPORT_SYMBOL(pci_mem_start);
++
++/*
++ * Search for the biggest gap in the low 32 bits of the e820
++ * memory space. We pass this space to PCI to assign MMIO resources
++ * for hotplug or unconfigured devices in.
++ * Hopefully the BIOS let enough space left.
++ */
++__init void e820_setup_gap(struct e820entry *e820, int nr_map)
++{
++ unsigned long gapstart, gapsize, round;
++ unsigned long last;
++ int i;
++ int found = 0;
++
++ last = 0x100000000ull;
++ gapstart = 0x10000000;
++ gapsize = 0x400000;
++ i = nr_map;
++ while (--i >= 0) {
++ unsigned long long start = e820[i].addr;
++ unsigned long long end = start + e820[i].size;
++
++ /*
++ * Since "last" is at most 4GB, we know we'll
++ * fit in 32 bits if this condition is true
++ */
++ if (last > end) {
++ unsigned long gap = last - end;
++
++ if (gap > gapsize) {
++ gapsize = gap;
++ gapstart = end;
++ found = 1;
++ }
++ }
++ if (start < last)
++ last = start;
++ }
++
++ if (!found) {
++ gapstart = (end_pfn << PAGE_SHIFT) + 1024*1024;
++ printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit address range\n"
++ KERN_ERR "PCI: Unassigned devices with 32bit resource registers may break!\n");
++ }
++
++ /*
++ * See how much we want to round up: start off with
++ * rounding to the next 1MB area.
++ */
++ round = 0x100000;
++ while ((gapsize >> 4) > round)
++ round += round;
++ /* Fun with two's complement */
++ pci_mem_start = (gapstart + round) & -round;
++
++ printk(KERN_INFO "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
++ pci_mem_start, gapstart, gapsize);
++}
+Index: head-2008-11-25/arch/x86/kernel/early_printk-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/early_printk-xen.c 2007-06-12 13:13:01.000000000 +0200
+@@ -0,0 +1,302 @@
++#include <linux/console.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/string.h>
++#include <linux/screen_info.h>
++#include <asm/io.h>
++#include <asm/processor.h>
++#include <asm/fcntl.h>
++
++/* Simple VGA output */
++
++#ifdef __i386__
++#include <asm/setup.h>
++#define VGABASE (__ISA_IO_base + 0xb8000)
++#else
++#include <asm/bootsetup.h>
++#define VGABASE ((void __iomem *)0xffffffff800b8000UL)
++#endif
++
++#ifndef CONFIG_XEN
++static int max_ypos = 25, max_xpos = 80;
++static int current_ypos = 25, current_xpos = 0;
++
++static void early_vga_write(struct console *con, const char *str, unsigned n)
++{
++ char c;
++ int i, k, j;
++
++ while ((c = *str++) != '\0' && n-- > 0) {
++ if (current_ypos >= max_ypos) {
++ /* scroll 1 line up */
++ for (k = 1, j = 0; k < max_ypos; k++, j++) {
++ for (i = 0; i < max_xpos; i++) {
++ writew(readw(VGABASE+2*(max_xpos*k+i)),
++ VGABASE + 2*(max_xpos*j + i));
++ }
++ }
++ for (i = 0; i < max_xpos; i++)
++ writew(0x720, VGABASE + 2*(max_xpos*j + i));
++ current_ypos = max_ypos-1;
++ }
++ if (c == '\n') {
++ current_xpos = 0;
++ current_ypos++;
++ } else if (c != '\r') {
++ writew(((0x7 << 8) | (unsigned short) c),
++ VGABASE + 2*(max_xpos*current_ypos +
++ current_xpos++));
++ if (current_xpos >= max_xpos) {
++ current_xpos = 0;
++ current_ypos++;
++ }
++ }
++ }
++}
++
++static struct console early_vga_console = {
++ .name = "earlyvga",
++ .write = early_vga_write,
++ .flags = CON_PRINTBUFFER,
++ .index = -1,
++};
++
++/* Serial functions loosely based on a similar package from Klaus P. Gerlicher */
++
++static int early_serial_base = 0x3f8; /* ttyS0 */
++
++#define XMTRDY 0x20
++
++#define DLAB 0x80
++
++#define TXR 0 /* Transmit register (WRITE) */
++#define RXR 0 /* Receive register (READ) */
++#define IER 1 /* Interrupt Enable */
++#define IIR 2 /* Interrupt ID */
++#define FCR 2 /* FIFO control */
++#define LCR 3 /* Line control */
++#define MCR 4 /* Modem control */
++#define LSR 5 /* Line Status */
++#define MSR 6 /* Modem Status */
++#define DLL 0 /* Divisor Latch Low */
++#define DLH 1 /* Divisor latch High */
++
++static int early_serial_putc(unsigned char ch)
++{
++ unsigned timeout = 0xffff;
++ while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
++ cpu_relax();
++ outb(ch, early_serial_base + TXR);
++ return timeout ? 0 : -1;
++}
++
++static void early_serial_write(struct console *con, const char *s, unsigned n)
++{
++ while (*s && n-- > 0) {
++ early_serial_putc(*s);
++ if (*s == '\n')
++ early_serial_putc('\r');
++ s++;
++ }
++}
++
++#define DEFAULT_BAUD 9600
++
++static __init void early_serial_init(char *s)
++{
++ unsigned char c;
++ unsigned divisor;
++ unsigned baud = DEFAULT_BAUD;
++ char *e;
++
++ if (*s == ',')
++ ++s;
++
++ if (*s) {
++ unsigned port;
++ if (!strncmp(s,"0x",2)) {
++ early_serial_base = simple_strtoul(s, &e, 16);
++ } else {
++ static int bases[] = { 0x3f8, 0x2f8 };
++
++ if (!strncmp(s,"ttyS",4))
++ s += 4;
++ port = simple_strtoul(s, &e, 10);
++ if (port > 1 || s == e)
++ port = 0;
++ early_serial_base = bases[port];
++ }
++ s += strcspn(s, ",");
++ if (*s == ',')
++ s++;
++ }
++
++ outb(0x3, early_serial_base + LCR); /* 8n1 */
++ outb(0, early_serial_base + IER); /* no interrupt */
++ outb(0, early_serial_base + FCR); /* no fifo */
++ outb(0x3, early_serial_base + MCR); /* DTR + RTS */
++
++ if (*s) {
++ baud = simple_strtoul(s, &e, 0);
++ if (baud == 0 || s == e)
++ baud = DEFAULT_BAUD;
++ }
++
++ divisor = 115200 / baud;
++ c = inb(early_serial_base + LCR);
++ outb(c | DLAB, early_serial_base + LCR);
++ outb(divisor & 0xff, early_serial_base + DLL);
++ outb((divisor >> 8) & 0xff, early_serial_base + DLH);
++ outb(c & ~DLAB, early_serial_base + LCR);
++}
++
++#else /* CONFIG_XEN */
++
++static void
++early_serial_write(struct console *con, const char *s, unsigned count)
++{
++ int n;
++
++ while (count > 0) {
++ n = HYPERVISOR_console_io(CONSOLEIO_write, count, (char *)s);
++ if (n <= 0)
++ break;
++ count -= n;
++ s += n;
++ }
++}
++
++static __init void early_serial_init(char *s)
++{
++}
++
++/*
++ * No early VGA console on Xen, as we do not have convenient ISA-space
++ * mappings. Someone should fix this for domain 0. For now, use fake serial.
++ */
++#define early_vga_console early_serial_console
++
++#endif
++
++static struct console early_serial_console = {
++ .name = "earlyser",
++ .write = early_serial_write,
++ .flags = CON_PRINTBUFFER,
++ .index = -1,
++};
++
++/* Console interface to a host file on AMD's SimNow! */
++
++static int simnow_fd;
++
++enum {
++ MAGIC1 = 0xBACCD00A,
++ MAGIC2 = 0xCA110000,
++ XOPEN = 5,
++ XWRITE = 4,
++};
++
++static noinline long simnow(long cmd, long a, long b, long c)
++{
++ long ret;
++ asm volatile("cpuid" :
++ "=a" (ret) :
++ "b" (a), "c" (b), "d" (c), "0" (MAGIC1), "D" (cmd + MAGIC2));
++ return ret;
++}
++
++void __init simnow_init(char *str)
++{
++ char *fn = "klog";
++ if (*str == '=')
++ fn = ++str;
++ /* error ignored */
++ simnow_fd = simnow(XOPEN, (unsigned long)fn, O_WRONLY|O_APPEND|O_CREAT, 0644);
++}
++
++static void simnow_write(struct console *con, const char *s, unsigned n)
++{
++ simnow(XWRITE, simnow_fd, (unsigned long)s, n);
++}
++
++static struct console simnow_console = {
++ .name = "simnow",
++ .write = simnow_write,
++ .flags = CON_PRINTBUFFER,
++ .index = -1,
++};
++
++/* Direct interface for emergencies */
++struct console *early_console = &early_vga_console;
++static int early_console_initialized = 0;
++
++void early_printk(const char *fmt, ...)
++{
++ char buf[512];
++ int n;
++ va_list ap;
++
++ va_start(ap,fmt);
++ n = vscnprintf(buf,512,fmt,ap);
++ early_console->write(early_console,buf,n);
++ va_end(ap);
++}
++
++static int __initdata keep_early;
++
++int __init setup_early_printk(char *opt)
++{
++ char *space;
++ char buf[256];
++
++ if (early_console_initialized)
++ return 1;
++
++ strlcpy(buf,opt,sizeof(buf));
++ space = strchr(buf, ' ');
++ if (space)
++ *space = 0;
++
++ if (strstr(buf,"keep"))
++ keep_early = 1;
++
++ if (!strncmp(buf, "serial", 6)) {
++ early_serial_init(buf + 6);
++ early_console = &early_serial_console;
++ } else if (!strncmp(buf, "ttyS", 4)) {
++ early_serial_init(buf);
++ early_console = &early_serial_console;
++ } else if (!strncmp(buf, "vga", 3)
++#ifndef CONFIG_XEN
++ && SCREEN_INFO.orig_video_isVGA == 1) {
++ max_xpos = SCREEN_INFO.orig_video_cols;
++ max_ypos = SCREEN_INFO.orig_video_lines;
++ current_ypos = SCREEN_INFO.orig_y;
++#else
++ || !strncmp(buf, "xen", 3)) {
++#endif
++ early_console = &early_vga_console;
++ } else if (!strncmp(buf, "simnow", 6)) {
++ simnow_init(buf + 6);
++ early_console = &simnow_console;
++ keep_early = 1;
++ }
++ early_console_initialized = 1;
++ register_console(early_console);
++ return 0;
++}
++
++void __init disable_early_printk(void)
++{
++ if (!early_console_initialized || !early_console)
++ return;
++ if (!keep_early) {
++ printk("disabling early console\n");
++ unregister_console(early_console);
++ early_console_initialized = 0;
++ } else {
++ printk("keeping early console\n");
++ }
++}
++
++__setup("earlyprintk=", setup_early_printk);
+Index: head-2008-11-25/arch/x86/kernel/entry_64-xen.S
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/entry_64-xen.S 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,1322 @@
++/*
++ * linux/arch/x86_64/entry.S
++ *
++ * Copyright (C) 1991, 1992 Linus Torvalds
++ * Copyright (C) 2000, 2001, 2002 Andi Kleen SuSE Labs
++ * Copyright (C) 2000 Pavel Machek <pavel@suse.cz>
++ *
++ * $Id$
++ *
++ * Jun Nakajima <jun.nakajima@intel.com>
++ * Asit Mallick <asit.k.mallick@intel.com>
++ * Modified for Xen
++ */
++
++/*
++ * entry.S contains the system-call and fault low-level handling routines.
++ *
++ * NOTE: This code handles signal-recognition, which happens every time
++ * after an interrupt and after each system call.
++ *
++ * Normal syscalls and interrupts don't save a full stack frame, this is
++ * only done for syscall tracing, signals or fork/exec et.al.
++ *
++ * A note on terminology:
++ * - top of stack: Architecture defined interrupt frame from SS to RIP
++ * at the top of the kernel process stack.
++ * - partial stack frame: partially saved registers upto R11.
++ * - full stack frame: Like partial stack frame, but all register saved.
++ *
++ * TODO:
++ * - schedule it carefully for the final hardware.
++ */
++
++#define ASSEMBLY 1
++#include <linux/linkage.h>
++#include <asm/segment.h>
++#include <asm/smp.h>
++#include <asm/cache.h>
++#include <asm/errno.h>
++#include <asm/dwarf2.h>
++#include <asm/calling.h>
++#include <asm/asm-offsets.h>
++#include <asm/msr.h>
++#include <asm/unistd.h>
++#include <asm/thread_info.h>
++#include <asm/hw_irq.h>
++#include <asm/page.h>
++#include <asm/irqflags.h>
++#include <asm/errno.h>
++#include <xen/interface/arch-x86_64.h>
++#include <xen/interface/features.h>
++
++#include "xen_entry.S"
++
++ .code64
++
++#ifndef CONFIG_PREEMPT
++#define retint_kernel retint_restore_args
++#endif
++
++
++.macro TRACE_IRQS_IRETQ offset=ARGOFFSET
++#ifdef CONFIG_TRACE_IRQFLAGS
++ bt $9,EFLAGS-\offset(%rsp) /* interrupts off? */
++ jnc 1f
++ TRACE_IRQS_ON
++1:
++#endif
++.endm
++
++NMI_MASK = 0x80000000
++
++/*
++ * C code is not supposed to know about undefined top of stack. Every time
++ * a C function with an pt_regs argument is called from the SYSCALL based
++ * fast path FIXUP_TOP_OF_STACK is needed.
++ * RESTORE_TOP_OF_STACK syncs the syscall state after any possible ptregs
++ * manipulation.
++ */
++
++ /* %rsp:at FRAMEEND */
++ .macro FIXUP_TOP_OF_STACK tmp
++ movq $__USER_CS,CS(%rsp)
++ movq $-1,RCX(%rsp)
++ .endm
++
++ .macro RESTORE_TOP_OF_STACK tmp,offset=0
++ .endm
++
++ .macro FAKE_STACK_FRAME child_rip
++ /* push in order ss, rsp, eflags, cs, rip */
++ xorl %eax, %eax
++ pushq %rax /* ss */
++ CFI_ADJUST_CFA_OFFSET 8
++ /*CFI_REL_OFFSET ss,0*/
++ pushq %rax /* rsp */
++ CFI_ADJUST_CFA_OFFSET 8
++ CFI_REL_OFFSET rsp,0
++ pushq $(1<<9) /* eflags - interrupts on */
++ CFI_ADJUST_CFA_OFFSET 8
++ /*CFI_REL_OFFSET rflags,0*/
++ pushq $__KERNEL_CS /* cs */
++ CFI_ADJUST_CFA_OFFSET 8
++ /*CFI_REL_OFFSET cs,0*/
++ pushq \child_rip /* rip */
++ CFI_ADJUST_CFA_OFFSET 8
++ CFI_REL_OFFSET rip,0
++ pushq %rax /* orig rax */
++ CFI_ADJUST_CFA_OFFSET 8
++ .endm
++
++ .macro UNFAKE_STACK_FRAME
++ addq $8*6, %rsp
++ CFI_ADJUST_CFA_OFFSET -(6*8)
++ .endm
++
++ .macro CFI_DEFAULT_STACK start=1,adj=0
++ .if \start
++ CFI_STARTPROC simple
++ CFI_DEF_CFA rsp,SS+8 - \adj*ARGOFFSET
++ .else
++ CFI_DEF_CFA_OFFSET SS+8 - \adj*ARGOFFSET
++ .endif
++ .if \adj == 0
++ CFI_REL_OFFSET r15,R15
++ CFI_REL_OFFSET r14,R14
++ CFI_REL_OFFSET r13,R13
++ CFI_REL_OFFSET r12,R12
++ CFI_REL_OFFSET rbp,RBP
++ CFI_REL_OFFSET rbx,RBX
++ .endif
++ CFI_REL_OFFSET r11,R11 - \adj*ARGOFFSET
++ CFI_REL_OFFSET r10,R10 - \adj*ARGOFFSET
++ CFI_REL_OFFSET r9,R9 - \adj*ARGOFFSET
++ CFI_REL_OFFSET r8,R8 - \adj*ARGOFFSET
++ CFI_REL_OFFSET rax,RAX - \adj*ARGOFFSET
++ CFI_REL_OFFSET rcx,RCX - \adj*ARGOFFSET
++ CFI_REL_OFFSET rdx,RDX - \adj*ARGOFFSET
++ CFI_REL_OFFSET rsi,RSI - \adj*ARGOFFSET
++ CFI_REL_OFFSET rdi,RDI - \adj*ARGOFFSET
++ CFI_REL_OFFSET rip,RIP - \adj*ARGOFFSET
++ /*CFI_REL_OFFSET cs,CS - \adj*ARGOFFSET*/
++ /*CFI_REL_OFFSET rflags,EFLAGS - \adj*ARGOFFSET*/
++ CFI_REL_OFFSET rsp,RSP - \adj*ARGOFFSET
++ /*CFI_REL_OFFSET ss,SS - \adj*ARGOFFSET*/
++ .endm
++
++ /*
++ * Must be consistent with the definition in arch-x86/xen-x86_64.h:
++ * struct iret_context {
++ * u64 rax, r11, rcx, flags, rip, cs, rflags, rsp, ss;
++ * };
++ * with rax, r11, and rcx being taken care of in the hypercall stub.
++ */
++ .macro HYPERVISOR_IRET flag
++ testb $3,1*8(%rsp)
++ jnz 2f
++ testl $NMI_MASK,2*8(%rsp)
++ jnz 2f
++
++ cmpb $0,(xen_features+XENFEAT_supervisor_mode_kernel)(%rip)
++ jne 1f
++
++ /* Direct iret to kernel space. Correct CS and SS. */
++ orl $3,1*8(%rsp)
++ orl $3,4*8(%rsp)
++1: iretq
++
++2: /* Slow iret via hypervisor. */
++ andl $~NMI_MASK, 2*8(%rsp)
++ pushq $\flag
++ jmp hypercall_page + (__HYPERVISOR_iret * 32)
++ .endm
++
++/*
++ * A newly forked process directly context switches into this.
++ */
++/* rdi: prev */
++ENTRY(ret_from_fork)
++ CFI_DEFAULT_STACK
++ push kernel_eflags(%rip)
++ CFI_ADJUST_CFA_OFFSET 4
++ popf # reset kernel eflags
++ CFI_ADJUST_CFA_OFFSET -4
++ call schedule_tail
++ GET_THREAD_INFO(%rcx)
++ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),threadinfo_flags(%rcx)
++ jnz rff_trace
++rff_action:
++ RESTORE_REST
++ testl $3,CS-ARGOFFSET(%rsp) # from kernel_thread?
++ je int_ret_from_sys_call
++ testl $_TIF_IA32,threadinfo_flags(%rcx)
++ jnz int_ret_from_sys_call
++ RESTORE_TOP_OF_STACK %rdi,ARGOFFSET
++ jmp ret_from_sys_call
++rff_trace:
++ movq %rsp,%rdi
++ call syscall_trace_leave
++ GET_THREAD_INFO(%rcx)
++ jmp rff_action
++ CFI_ENDPROC
++END(ret_from_fork)
++
++/*
++ * initial frame state for interrupts and exceptions
++ */
++ .macro _frame ref
++ CFI_STARTPROC simple
++ CFI_DEF_CFA rsp,SS+8-\ref
++ /*CFI_REL_OFFSET ss,SS-\ref*/
++ CFI_REL_OFFSET rsp,RSP-\ref
++ /*CFI_REL_OFFSET rflags,EFLAGS-\ref*/
++ /*CFI_REL_OFFSET cs,CS-\ref*/
++ CFI_REL_OFFSET rip,RIP-\ref
++ .endm
++
++/*
++ * System call entry. Upto 6 arguments in registers are supported.
++ *
++ * SYSCALL does not save anything on the stack and does not change the
++ * stack pointer.
++ */
++
++/*
++ * Register setup:
++ * rax system call number
++ * rdi arg0
++ * rcx return address for syscall/sysret, C arg3
++ * rsi arg1
++ * rdx arg2
++ * r10 arg3 (--> moved to rcx for C)
++ * r8 arg4
++ * r9 arg5
++ * r11 eflags for syscall/sysret, temporary for C
++ * r12-r15,rbp,rbx saved by C code, not touched.
++ *
++ * Interrupts are enabled on entry.
++ * Only called from user space.
++ *
++ * XXX if we had a free scratch register we could save the RSP into the stack frame
++ * and report it properly in ps. Unfortunately we haven't.
++ *
++ * When user can change the frames always force IRET. That is because
++ * it deals with uncanonical addresses better. SYSRET has trouble
++ * with them due to bugs in both AMD and Intel CPUs.
++ */
++
++ENTRY(system_call)
++ _frame (RIP-0x10)
++ SAVE_ARGS -8,0
++ movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
++ GET_THREAD_INFO(%rcx)
++ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%rcx)
++ CFI_REMEMBER_STATE
++ jnz tracesys
++ cmpq $__NR_syscall_max,%rax
++ ja badsys
++ movq %r10,%rcx
++ call *sys_call_table(,%rax,8) # XXX: rip relative
++ movq %rax,RAX-ARGOFFSET(%rsp)
++/*
++ * Syscall return path ending with SYSRET (fast path)
++ * Has incomplete stack frame and undefined top of stack.
++ */
++ .globl ret_from_sys_call
++ret_from_sys_call:
++ movl $_TIF_ALLWORK_MASK,%edi
++ /* edi: flagmask */
++sysret_check:
++ GET_THREAD_INFO(%rcx)
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ movl threadinfo_flags(%rcx),%edx
++ andl %edi,%edx
++ CFI_REMEMBER_STATE
++ jnz sysret_careful
++ /*
++ * sysretq will re-enable interrupts:
++ */
++ TRACE_IRQS_ON
++ XEN_UNBLOCK_EVENTS(%rsi)
++ RESTORE_ARGS 0,8,0
++ HYPERVISOR_IRET VGCF_IN_SYSCALL
++
++ /* Handle reschedules */
++ /* edx: work, edi: workmask */
++sysret_careful:
++ CFI_RESTORE_STATE
++ bt $TIF_NEED_RESCHED,%edx
++ jnc sysret_signal
++ TRACE_IRQS_ON
++ XEN_UNBLOCK_EVENTS(%rsi)
++ pushq %rdi
++ CFI_ADJUST_CFA_OFFSET 8
++ call schedule
++ popq %rdi
++ CFI_ADJUST_CFA_OFFSET -8
++ jmp sysret_check
++
++ /* Handle a signal */
++sysret_signal:
++ TRACE_IRQS_ON
++/* sti */
++ XEN_UNBLOCK_EVENTS(%rsi)
++ testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
++ jz 1f
++
++ /* Really a signal */
++ /* edx: work flags (arg3) */
++ leaq do_notify_resume(%rip),%rax
++ leaq -ARGOFFSET(%rsp),%rdi # &pt_regs -> arg1
++ xorl %esi,%esi # oldset -> arg2
++ call ptregscall_common
++1: movl $_TIF_NEED_RESCHED,%edi
++ /* Use IRET because user could have changed frame. This
++ works because ptregscall_common has called FIXUP_TOP_OF_STACK. */
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ jmp int_with_check
++
++badsys:
++ movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
++ jmp ret_from_sys_call
++
++ /* Do syscall tracing */
++tracesys:
++ CFI_RESTORE_STATE
++ SAVE_REST
++ movq $-ENOSYS,RAX(%rsp)
++ FIXUP_TOP_OF_STACK %rdi
++ movq %rsp,%rdi
++ call syscall_trace_enter
++ LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
++ RESTORE_REST
++ cmpq $__NR_syscall_max,%rax
++ ja 1f
++ movq %r10,%rcx /* fixup for C */
++ call *sys_call_table(,%rax,8)
++1: movq %rax,RAX-ARGOFFSET(%rsp)
++ /* Use IRET because user could have changed frame */
++ jmp int_ret_from_sys_call
++ CFI_ENDPROC
++END(system_call)
++
++/*
++ * Syscall return path ending with IRET.
++ * Has correct top of stack, but partial stack frame.
++ */
++ENTRY(int_ret_from_sys_call)
++ CFI_STARTPROC simple
++ CFI_DEF_CFA rsp,SS+8-ARGOFFSET
++ /*CFI_REL_OFFSET ss,SS-ARGOFFSET*/
++ CFI_REL_OFFSET rsp,RSP-ARGOFFSET
++ /*CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
++ /*CFI_REL_OFFSET cs,CS-ARGOFFSET*/
++ CFI_REL_OFFSET rip,RIP-ARGOFFSET
++ CFI_REL_OFFSET rdx,RDX-ARGOFFSET
++ CFI_REL_OFFSET rcx,RCX-ARGOFFSET
++ CFI_REL_OFFSET rax,RAX-ARGOFFSET
++ CFI_REL_OFFSET rdi,RDI-ARGOFFSET
++ CFI_REL_OFFSET rsi,RSI-ARGOFFSET
++ CFI_REL_OFFSET r8,R8-ARGOFFSET
++ CFI_REL_OFFSET r9,R9-ARGOFFSET
++ CFI_REL_OFFSET r10,R10-ARGOFFSET
++ CFI_REL_OFFSET r11,R11-ARGOFFSET
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ testb $3,CS-ARGOFFSET(%rsp)
++ jnz 1f
++ /* Need to set the proper %ss (not NULL) for ring 3 iretq */
++ movl $__KERNEL_DS,SS-ARGOFFSET(%rsp)
++ jmp retint_restore_args # retrun from ring3 kernel
++1:
++ movl $_TIF_ALLWORK_MASK,%edi
++ /* edi: mask to check */
++int_with_check:
++ GET_THREAD_INFO(%rcx)
++ movl threadinfo_flags(%rcx),%edx
++ andl %edi,%edx
++ jnz int_careful
++ andl $~TS_COMPAT,threadinfo_status(%rcx)
++ jmp retint_restore_args
++
++ /* Either reschedule or signal or syscall exit tracking needed. */
++ /* First do a reschedule test. */
++ /* edx: work, edi: workmask */
++int_careful:
++ bt $TIF_NEED_RESCHED,%edx
++ jnc int_very_careful
++ TRACE_IRQS_ON
++/* sti */
++ XEN_UNBLOCK_EVENTS(%rsi)
++ pushq %rdi
++ CFI_ADJUST_CFA_OFFSET 8
++ call schedule
++ popq %rdi
++ CFI_ADJUST_CFA_OFFSET -8
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ jmp int_with_check
++
++ /* handle signals and tracing -- both require a full stack frame */
++int_very_careful:
++ TRACE_IRQS_ON
++/* sti */
++ XEN_UNBLOCK_EVENTS(%rsi)
++ SAVE_REST
++ /* Check for syscall exit trace */
++ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edx
++ jz int_signal
++ pushq %rdi
++ CFI_ADJUST_CFA_OFFSET 8
++ leaq 8(%rsp),%rdi # &ptregs -> arg1
++ call syscall_trace_leave
++ popq %rdi
++ CFI_ADJUST_CFA_OFFSET -8
++ andl $~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edi
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ jmp int_restore_rest
++
++int_signal:
++ testl $(_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_SINGLESTEP),%edx
++ jz 1f
++ movq %rsp,%rdi # &ptregs -> arg1
++ xorl %esi,%esi # oldset -> arg2
++ call do_notify_resume
++1: movl $_TIF_NEED_RESCHED,%edi
++int_restore_rest:
++ RESTORE_REST
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ jmp int_with_check
++ CFI_ENDPROC
++END(int_ret_from_sys_call)
++
++/*
++ * Certain special system calls that need to save a complete full stack frame.
++ */
++
++ .macro PTREGSCALL label,func,arg
++ .globl \label
++\label:
++ leaq \func(%rip),%rax
++ leaq -ARGOFFSET+8(%rsp),\arg /* 8 for return address */
++ jmp ptregscall_common
++END(\label)
++ .endm
++
++ CFI_STARTPROC
++
++ PTREGSCALL stub_clone, sys_clone, %r8
++ PTREGSCALL stub_fork, sys_fork, %rdi
++ PTREGSCALL stub_vfork, sys_vfork, %rdi
++ PTREGSCALL stub_rt_sigsuspend, sys_rt_sigsuspend, %rdx
++ PTREGSCALL stub_sigaltstack, sys_sigaltstack, %rdx
++ PTREGSCALL stub_iopl, sys_iopl, %rsi
++
++ENTRY(ptregscall_common)
++ popq %r11
++ CFI_ADJUST_CFA_OFFSET -8
++ CFI_REGISTER rip, r11
++ SAVE_REST
++ movq %r11, %r15
++ CFI_REGISTER rip, r15
++ FIXUP_TOP_OF_STACK %r11
++ call *%rax
++ RESTORE_TOP_OF_STACK %r11
++ movq %r15, %r11
++ CFI_REGISTER rip, r11
++ RESTORE_REST
++ pushq %r11
++ CFI_ADJUST_CFA_OFFSET 8
++ CFI_REL_OFFSET rip, 0
++ ret
++ CFI_ENDPROC
++END(ptregscall_common)
++
++ENTRY(stub_execve)
++ CFI_STARTPROC
++ popq %r11
++ CFI_ADJUST_CFA_OFFSET -8
++ CFI_REGISTER rip, r11
++ SAVE_REST
++ FIXUP_TOP_OF_STACK %r11
++ call sys_execve
++ RESTORE_TOP_OF_STACK %r11
++ movq %rax,RAX(%rsp)
++ RESTORE_REST
++ jmp int_ret_from_sys_call
++ CFI_ENDPROC
++END(stub_execve)
++
++/*
++ * sigreturn is special because it needs to restore all registers on return.
++ * This cannot be done with SYSRET, so use the IRET return path instead.
++ */
++ENTRY(stub_rt_sigreturn)
++ CFI_STARTPROC
++ addq $8, %rsp
++ CFI_ADJUST_CFA_OFFSET -8
++ SAVE_REST
++ movq %rsp,%rdi
++ FIXUP_TOP_OF_STACK %r11
++ call sys_rt_sigreturn
++ movq %rax,RAX(%rsp) # fixme, this could be done at the higher layer
++ RESTORE_REST
++ jmp int_ret_from_sys_call
++ CFI_ENDPROC
++END(stub_rt_sigreturn)
++
++/* initial frame state for interrupts (and exceptions without error code) */
++#define INTR_FRAME _frame (RIP-0x10); \
++ CFI_REL_OFFSET rcx,0; \
++ CFI_REL_OFFSET r11,8
++
++/* initial frame state for exceptions with error code (and interrupts with
++ vector already pushed) */
++#define XCPT_FRAME _frame (RIP-0x18); \
++ CFI_REL_OFFSET rcx,0; \
++ CFI_REL_OFFSET r11,8
++
++/*
++ * Interrupt exit.
++ *
++ */
++
++retint_check:
++ CFI_DEFAULT_STACK adj=1
++ movl threadinfo_flags(%rcx),%edx
++ andl %edi,%edx
++ CFI_REMEMBER_STATE
++ jnz retint_careful
++retint_restore_args:
++ movl EFLAGS-REST_SKIP(%rsp), %eax
++ shr $9, %eax # EAX[0] == IRET_EFLAGS.IF
++ XEN_GET_VCPU_INFO(%rsi)
++ andb evtchn_upcall_mask(%rsi),%al
++ andb $1,%al # EAX[0] == IRET_EFLAGS.IF & event_mask
++ jnz restore_all_enable_events # != 0 => enable event delivery
++ XEN_PUT_VCPU_INFO(%rsi)
++
++ RESTORE_ARGS 0,8,0
++ HYPERVISOR_IRET 0
++
++ /* edi: workmask, edx: work */
++retint_careful:
++ CFI_RESTORE_STATE
++ bt $TIF_NEED_RESCHED,%edx
++ jnc retint_signal
++ TRACE_IRQS_ON
++ XEN_UNBLOCK_EVENTS(%rsi)
++/* sti */
++ pushq %rdi
++ CFI_ADJUST_CFA_OFFSET 8
++ call schedule
++ popq %rdi
++ CFI_ADJUST_CFA_OFFSET -8
++ GET_THREAD_INFO(%rcx)
++ XEN_BLOCK_EVENTS(%rsi)
++/* cli */
++ TRACE_IRQS_OFF
++ jmp retint_check
++
++retint_signal:
++ testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
++ jz retint_restore_args
++ TRACE_IRQS_ON
++ XEN_UNBLOCK_EVENTS(%rsi)
++ SAVE_REST
++ movq $-1,ORIG_RAX(%rsp)
++ xorl %esi,%esi # oldset
++ movq %rsp,%rdi # &pt_regs
++ call do_notify_resume
++ RESTORE_REST
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ movl $_TIF_NEED_RESCHED,%edi
++ GET_THREAD_INFO(%rcx)
++ jmp retint_check
++
++#ifdef CONFIG_PREEMPT
++ /* Returning to kernel space. Check if we need preemption */
++ /* rcx: threadinfo. interrupts off. */
++ .p2align
++retint_kernel:
++ cmpl $0,threadinfo_preempt_count(%rcx)
++ jnz retint_restore_args
++ bt $TIF_NEED_RESCHED,threadinfo_flags(%rcx)
++ jnc retint_restore_args
++ bt $9,EFLAGS-ARGOFFSET(%rsp) /* interrupts off? */
++ jnc retint_restore_args
++ call preempt_schedule_irq
++ jmp retint_kernel /* check again */
++#endif
++
++ CFI_ENDPROC
++END(retint_check)
++
++#ifndef CONFIG_XEN
++/*
++ * APIC interrupts.
++ */
++ .macro apicinterrupt num,func
++ INTR_FRAME
++ pushq $~(\num)
++ CFI_ADJUST_CFA_OFFSET 8
++ interrupt \func
++ jmp error_entry
++ CFI_ENDPROC
++ .endm
++
++ENTRY(thermal_interrupt)
++ apicinterrupt THERMAL_APIC_VECTOR,smp_thermal_interrupt
++END(thermal_interrupt)
++
++ENTRY(threshold_interrupt)
++ apicinterrupt THRESHOLD_APIC_VECTOR,mce_threshold_interrupt
++END(threshold_interrupt)
++
++#ifdef CONFIG_SMP
++ENTRY(reschedule_interrupt)
++ apicinterrupt RESCHEDULE_VECTOR,smp_reschedule_interrupt
++END(reschedule_interrupt)
++
++ .macro INVALIDATE_ENTRY num
++ENTRY(invalidate_interrupt\num)
++ apicinterrupt INVALIDATE_TLB_VECTOR_START+\num,smp_invalidate_interrupt
++END(invalidate_interrupt\num)
++ .endm
++
++ INVALIDATE_ENTRY 0
++ INVALIDATE_ENTRY 1
++ INVALIDATE_ENTRY 2
++ INVALIDATE_ENTRY 3
++ INVALIDATE_ENTRY 4
++ INVALIDATE_ENTRY 5
++ INVALIDATE_ENTRY 6
++ INVALIDATE_ENTRY 7
++
++ENTRY(call_function_interrupt)
++ apicinterrupt CALL_FUNCTION_VECTOR,smp_call_function_interrupt
++END(call_function_interrupt)
++#endif
++
++#ifdef CONFIG_X86_LOCAL_APIC
++ENTRY(apic_timer_interrupt)
++ apicinterrupt LOCAL_TIMER_VECTOR,smp_apic_timer_interrupt
++END(apic_timer_interrupt)
++
++ENTRY(error_interrupt)
++ apicinterrupt ERROR_APIC_VECTOR,smp_error_interrupt
++END(error_interrupt)
++
++ENTRY(spurious_interrupt)
++ apicinterrupt SPURIOUS_APIC_VECTOR,smp_spurious_interrupt
++END(spurious_interrupt)
++#endif
++#endif /* !CONFIG_XEN */
++
++/*
++ * Exception entry points.
++ */
++ .macro zeroentry sym
++ INTR_FRAME
++ movq (%rsp),%rcx
++ CFI_RESTORE rcx
++ movq 8(%rsp),%r11
++ CFI_RESTORE r11
++ addq $0x10,%rsp /* skip rcx and r11 */
++ CFI_ADJUST_CFA_OFFSET -0x10
++ pushq $0 /* push error code/oldrax */
++ CFI_ADJUST_CFA_OFFSET 8
++ pushq %rax /* push real oldrax to the rdi slot */
++ CFI_ADJUST_CFA_OFFSET 8
++ CFI_REL_OFFSET rax,0
++ leaq \sym(%rip),%rax
++ jmp error_entry
++ CFI_ENDPROC
++ .endm
++
++ .macro errorentry sym
++ XCPT_FRAME
++ movq (%rsp),%rcx
++ CFI_RESTORE rcx
++ movq 8(%rsp),%r11
++ CFI_RESTORE r11
++ addq $0x10,%rsp /* rsp points to the error code */
++ CFI_ADJUST_CFA_OFFSET -0x10
++ pushq %rax
++ CFI_ADJUST_CFA_OFFSET 8
++ CFI_REL_OFFSET rax,0
++ leaq \sym(%rip),%rax
++ jmp error_entry
++ CFI_ENDPROC
++ .endm
++
++#if 0 /* not XEN */
++ /* error code is on the stack already */
++ /* handle NMI like exceptions that can happen everywhere */
++ .macro paranoidentry sym, ist=0, irqtrace=1
++ movq (%rsp),%rcx
++ movq 8(%rsp),%r11
++ addq $0x10,%rsp /* skip rcx and r11 */
++ SAVE_ALL
++ cld
++#if 0 /* not XEN */
++ movl $1,%ebx
++ movl $MSR_GS_BASE,%ecx
++ rdmsr
++ testl %edx,%edx
++ js 1f
++ swapgs
++ xorl %ebx,%ebx
++1:
++#endif
++ .if \ist
++ movq %gs:pda_data_offset, %rbp
++ .endif
++ movq %rsp,%rdi
++ movq ORIG_RAX(%rsp),%rsi
++ movq $-1,ORIG_RAX(%rsp)
++ .if \ist
++ subq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
++ .endif
++ call \sym
++ .if \ist
++ addq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
++ .endif
++/* cli */
++ XEN_BLOCK_EVENTS(%rsi)
++ .if \irqtrace
++ TRACE_IRQS_OFF
++ .endif
++ .endm
++
++ /*
++ * "Paranoid" exit path from exception stack.
++ * Paranoid because this is used by NMIs and cannot take
++ * any kernel state for granted.
++ * We don't do kernel preemption checks here, because only
++ * NMI should be common and it does not enable IRQs and
++ * cannot get reschedule ticks.
++ *
++ * "trace" is 0 for the NMI handler only, because irq-tracing
++ * is fundamentally NMI-unsafe. (we cannot change the soft and
++ * hard flags at once, atomically)
++ */
++ .macro paranoidexit trace=1
++ /* ebx: no swapgs flag */
++paranoid_exit\trace:
++ testl %ebx,%ebx /* swapgs needed? */
++ jnz paranoid_restore\trace
++ testl $3,CS(%rsp)
++ jnz paranoid_userspace\trace
++paranoid_swapgs\trace:
++ TRACE_IRQS_IRETQ 0
++ swapgs
++paranoid_restore\trace:
++ RESTORE_ALL 8
++ iretq
++paranoid_userspace\trace:
++ GET_THREAD_INFO(%rcx)
++ movl threadinfo_flags(%rcx),%ebx
++ andl $_TIF_WORK_MASK,%ebx
++ jz paranoid_swapgs\trace
++ movq %rsp,%rdi /* &pt_regs */
++ call sync_regs
++ movq %rax,%rsp /* switch stack for scheduling */
++ testl $_TIF_NEED_RESCHED,%ebx
++ jnz paranoid_schedule\trace
++ movl %ebx,%edx /* arg3: thread flags */
++ .if \trace
++ TRACE_IRQS_ON
++ .endif
++ sti
++ xorl %esi,%esi /* arg2: oldset */
++ movq %rsp,%rdi /* arg1: &pt_regs */
++ call do_notify_resume
++ cli
++ .if \trace
++ TRACE_IRQS_OFF
++ .endif
++ jmp paranoid_userspace\trace
++paranoid_schedule\trace:
++ .if \trace
++ TRACE_IRQS_ON
++ .endif
++ sti
++ call schedule
++ cli
++ .if \trace
++ TRACE_IRQS_OFF
++ .endif
++ jmp paranoid_userspace\trace
++ CFI_ENDPROC
++ .endm
++#endif
++
++/*
++ * Exception entry point. This expects an error code/orig_rax on the stack
++ * and the exception handler in %rax.
++ */
++ENTRY(error_entry)
++ _frame RDI
++ CFI_REL_OFFSET rax,0
++ /* rdi slot contains rax, oldrax contains error code */
++ cld
++ subq $14*8,%rsp
++ CFI_ADJUST_CFA_OFFSET (14*8)
++ movq %rsi,13*8(%rsp)
++ CFI_REL_OFFSET rsi,RSI
++ movq 14*8(%rsp),%rsi /* load rax from rdi slot */
++ CFI_REGISTER rax,rsi
++ movq %rdx,12*8(%rsp)
++ CFI_REL_OFFSET rdx,RDX
++ movq %rcx,11*8(%rsp)
++ CFI_REL_OFFSET rcx,RCX
++ movq %rsi,10*8(%rsp) /* store rax */
++ CFI_REL_OFFSET rax,RAX
++ movq %r8, 9*8(%rsp)
++ CFI_REL_OFFSET r8,R8
++ movq %r9, 8*8(%rsp)
++ CFI_REL_OFFSET r9,R9
++ movq %r10,7*8(%rsp)
++ CFI_REL_OFFSET r10,R10
++ movq %r11,6*8(%rsp)
++ CFI_REL_OFFSET r11,R11
++ movq %rbx,5*8(%rsp)
++ CFI_REL_OFFSET rbx,RBX
++ movq %rbp,4*8(%rsp)
++ CFI_REL_OFFSET rbp,RBP
++ movq %r12,3*8(%rsp)
++ CFI_REL_OFFSET r12,R12
++ movq %r13,2*8(%rsp)
++ CFI_REL_OFFSET r13,R13
++ movq %r14,1*8(%rsp)
++ CFI_REL_OFFSET r14,R14
++ movq %r15,(%rsp)
++ CFI_REL_OFFSET r15,R15
++#if 0
++ cmpl $__KERNEL_CS,CS(%rsp)
++ CFI_REMEMBER_STATE
++ je error_kernelspace
++#endif
++error_call_handler:
++ movq %rdi, RDI(%rsp)
++ CFI_REL_OFFSET rdi,RDI
++ movq %rsp,%rdi
++ movq ORIG_RAX(%rsp),%rsi # get error code
++ movq $-1,ORIG_RAX(%rsp)
++ call *%rax
++error_exit:
++ RESTORE_REST
++/* cli */
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ GET_THREAD_INFO(%rcx)
++ testb $3,CS-ARGOFFSET(%rsp)
++ jz retint_kernel
++ movl threadinfo_flags(%rcx),%edx
++ movl $_TIF_WORK_MASK,%edi
++ andl %edi,%edx
++ jnz retint_careful
++ /*
++ * The iret might restore flags:
++ */
++ TRACE_IRQS_IRETQ
++ jmp retint_restore_args
++
++#if 0
++ /*
++ * We need to re-write the logic here because we don't do iretq to
++ * to return to user mode. It's still possible that we get trap/fault
++ * in the kernel (when accessing buffers pointed to by system calls,
++ * for example).
++ *
++ */
++ CFI_RESTORE_STATE
++error_kernelspace:
++ incl %ebx
++ /* There are two places in the kernel that can potentially fault with
++ usergs. Handle them here. The exception handlers after
++ iret run with kernel gs again, so don't set the user space flag.
++ B stepping K8s sometimes report an truncated RIP for IRET
++ exceptions returning to compat mode. Check for these here too. */
++ leaq iret_label(%rip),%rbp
++ cmpq %rbp,RIP(%rsp)
++ je error_swapgs
++ movl %ebp,%ebp /* zero extend */
++ cmpq %rbp,RIP(%rsp)
++ je error_swapgs
++ cmpq $gs_change,RIP(%rsp)
++ je error_swapgs
++ jmp error_sti
++#endif
++ CFI_ENDPROC
++END(error_entry)
++
++ENTRY(hypervisor_callback)
++ zeroentry do_hypervisor_callback
++END(hypervisor_callback)
++
++/*
++ * Copied from arch/xen/i386/kernel/entry.S
++ */
++# A note on the "critical region" in our callback handler.
++# We want to avoid stacking callback handlers due to events occurring
++# during handling of the last event. To do this, we keep events disabled
++# until we've done all processing. HOWEVER, we must enable events before
++# popping the stack frame (can't be done atomically) and so it would still
++# be possible to get enough handler activations to overflow the stack.
++# Although unlikely, bugs of that kind are hard to track down, so we'd
++# like to avoid the possibility.
++# So, on entry to the handler we detect whether we interrupted an
++# existing activation in its critical region -- if so, we pop the current
++# activation and restart the handler using the previous one.
++ENTRY(do_hypervisor_callback) # do_hypervisor_callback(struct *pt_regs)
++ CFI_STARTPROC
++# Since we don't modify %rdi, evtchn_do_upall(struct *pt_regs) will
++# see the correct pointer to the pt_regs
++ movq %rdi, %rsp # we don't return, adjust the stack frame
++ CFI_ENDPROC
++ CFI_DEFAULT_STACK
++11: incl %gs:pda_irqcount
++ movq %rsp,%rbp
++ CFI_DEF_CFA_REGISTER rbp
++ cmovzq %gs:pda_irqstackptr,%rsp
++ pushq %rbp # backlink for old unwinder
++ call evtchn_do_upcall
++ popq %rsp
++ CFI_DEF_CFA_REGISTER rsp
++ decl %gs:pda_irqcount
++ jmp error_exit
++ CFI_ENDPROC
++END(do_hypervisor_callback)
++
++#ifdef CONFIG_X86_LOCAL_APIC
++KPROBE_ENTRY(nmi)
++ zeroentry do_nmi_callback
++ENTRY(do_nmi_callback)
++ CFI_STARTPROC
++ addq $8, %rsp
++ CFI_ENDPROC
++ CFI_DEFAULT_STACK
++ call do_nmi
++ orl $NMI_MASK,EFLAGS(%rsp)
++ RESTORE_REST
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ GET_THREAD_INFO(%rcx)
++ jmp retint_restore_args
++ CFI_ENDPROC
++ .previous .text
++END(nmi)
++#endif
++
++ ALIGN
++restore_all_enable_events:
++ CFI_DEFAULT_STACK adj=1
++ TRACE_IRQS_ON
++ XEN_UNBLOCK_EVENTS(%rsi) # %rsi is already set up...
++
++scrit: /**** START OF CRITICAL REGION ****/
++ XEN_TEST_PENDING(%rsi)
++ CFI_REMEMBER_STATE
++ jnz 14f # process more events if necessary...
++ XEN_PUT_VCPU_INFO(%rsi)
++ RESTORE_ARGS 0,8,0
++ HYPERVISOR_IRET 0
++
++ CFI_RESTORE_STATE
++14: XEN_LOCKED_BLOCK_EVENTS(%rsi)
++ XEN_PUT_VCPU_INFO(%rsi)
++ SAVE_REST
++ movq %rsp,%rdi # set the argument again
++ jmp 11b
++ CFI_ENDPROC
++ecrit: /**** END OF CRITICAL REGION ****/
++# At this point, unlike on x86-32, we don't do the fixup to simplify the
++# code and the stack frame is more complex on x86-64.
++# When the kernel is interrupted in the critical section, the kernel
++# will do IRET in that case, and everything will be restored at that point,
++# i.e. it just resumes from the next instruction interrupted with the same context.
++
++# Hypervisor uses this for application faults while it executes.
++# We get here for two reasons:
++# 1. Fault while reloading DS, ES, FS or GS
++# 2. Fault while executing IRET
++# Category 1 we do not need to fix up as Xen has already reloaded all segment
++# registers that could be reloaded and zeroed the others.
++# Category 2 we fix up by killing the current process. We cannot use the
++# normal Linux return path in this case because if we use the IRET hypercall
++# to pop the stack frame we end up in an infinite loop of failsafe callbacks.
++# We distinguish between categories by comparing each saved segment register
++# with its current contents: any discrepancy means we in category 1.
++ENTRY(failsafe_callback)
++ _frame (RIP-0x30)
++ CFI_REL_OFFSET rcx, 0
++ CFI_REL_OFFSET r11, 8
++ movw %ds,%cx
++ cmpw %cx,0x10(%rsp)
++ CFI_REMEMBER_STATE
++ jne 1f
++ movw %es,%cx
++ cmpw %cx,0x18(%rsp)
++ jne 1f
++ movw %fs,%cx
++ cmpw %cx,0x20(%rsp)
++ jne 1f
++ movw %gs,%cx
++ cmpw %cx,0x28(%rsp)
++ jne 1f
++ /* All segments match their saved values => Category 2 (Bad IRET). */
++ movq (%rsp),%rcx
++ CFI_RESTORE rcx
++ movq 8(%rsp),%r11
++ CFI_RESTORE r11
++ addq $0x30,%rsp
++ CFI_ADJUST_CFA_OFFSET -0x30
++ movq $11,%rdi /* SIGSEGV */
++ jmp do_exit
++ CFI_RESTORE_STATE
++1: /* Segment mismatch => Category 1 (Bad segment). Retry the IRET. */
++ movq (%rsp),%rcx
++ CFI_RESTORE rcx
++ movq 8(%rsp),%r11
++ CFI_RESTORE r11
++ addq $0x30,%rsp
++ CFI_ADJUST_CFA_OFFSET -0x30
++ pushq $0
++ CFI_ADJUST_CFA_OFFSET 8
++ SAVE_ALL
++ jmp error_exit
++ CFI_ENDPROC
++#if 0
++ .section __ex_table,"a"
++ .align 8
++ .quad gs_change,bad_gs
++ .previous
++ .section .fixup,"ax"
++ /* running with kernelgs */
++bad_gs:
++/* swapgs */ /* switch back to user gs */
++ xorl %eax,%eax
++ movl %eax,%gs
++ jmp 2b
++ .previous
++#endif
++
++/*
++ * Create a kernel thread.
++ *
++ * C extern interface:
++ * extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
++ *
++ * asm input arguments:
++ * rdi: fn, rsi: arg, rdx: flags
++ */
++ENTRY(kernel_thread)
++ CFI_STARTPROC
++ FAKE_STACK_FRAME $child_rip
++ SAVE_ALL
++
++ # rdi: flags, rsi: usp, rdx: will be &pt_regs
++ movq %rdx,%rdi
++ orq kernel_thread_flags(%rip),%rdi
++ movq $-1, %rsi
++ movq %rsp, %rdx
++
++ xorl %r8d,%r8d
++ xorl %r9d,%r9d
++
++ # clone now
++ call do_fork
++ movq %rax,RAX(%rsp)
++ xorl %edi,%edi
++
++ /*
++ * It isn't worth to check for reschedule here,
++ * so internally to the x86_64 port you can rely on kernel_thread()
++ * not to reschedule the child before returning, this avoids the need
++ * of hacks for example to fork off the per-CPU idle tasks.
++ * [Hopefully no generic code relies on the reschedule -AK]
++ */
++ RESTORE_ALL
++ UNFAKE_STACK_FRAME
++ ret
++ CFI_ENDPROC
++ENDPROC(kernel_thread)
++
++child_rip:
++ pushq $0 # fake return address
++ CFI_STARTPROC
++ /*
++ * Here we are in the child and the registers are set as they were
++ * at kernel_thread() invocation in the parent.
++ */
++ movq %rdi, %rax
++ movq %rsi, %rdi
++ call *%rax
++ # exit
++ xorl %edi, %edi
++ call do_exit
++ CFI_ENDPROC
++ENDPROC(child_rip)
++
++/*
++ * execve(). This function needs to use IRET, not SYSRET, to set up all state properly.
++ *
++ * C extern interface:
++ * extern long execve(char *name, char **argv, char **envp)
++ *
++ * asm input arguments:
++ * rdi: name, rsi: argv, rdx: envp
++ *
++ * We want to fallback into:
++ * extern long sys_execve(char *name, char **argv,char **envp, struct pt_regs regs)
++ *
++ * do_sys_execve asm fallback arguments:
++ * rdi: name, rsi: argv, rdx: envp, fake frame on the stack
++ */
++ENTRY(execve)
++ CFI_STARTPROC
++ FAKE_STACK_FRAME $0
++ SAVE_ALL
++ call sys_execve
++ movq %rax, RAX(%rsp)
++ RESTORE_REST
++ testq %rax,%rax
++ jne 1f
++ jmp int_ret_from_sys_call
++1: RESTORE_ARGS
++ UNFAKE_STACK_FRAME
++ ret
++ CFI_ENDPROC
++ENDPROC(execve)
++
++KPROBE_ENTRY(page_fault)
++ errorentry do_page_fault
++END(page_fault)
++ .previous .text
++
++ENTRY(coprocessor_error)
++ zeroentry do_coprocessor_error
++END(coprocessor_error)
++
++ENTRY(simd_coprocessor_error)
++ zeroentry do_simd_coprocessor_error
++END(simd_coprocessor_error)
++
++ENTRY(device_not_available)
++ zeroentry math_state_restore
++END(device_not_available)
++
++ /* runs on exception stack */
++KPROBE_ENTRY(debug)
++/* INTR_FRAME
++ pushq $0
++ CFI_ADJUST_CFA_OFFSET 8 */
++ zeroentry do_debug
++/* paranoidexit
++ CFI_ENDPROC */
++END(debug)
++ .previous .text
++
++#if 0
++ /* runs on exception stack */
++KPROBE_ENTRY(nmi)
++ INTR_FRAME
++ pushq $-1
++ CFI_ADJUST_CFA_OFFSET 8
++ paranoidentry do_nmi, 0, 0
++#ifdef CONFIG_TRACE_IRQFLAGS
++ paranoidexit 0
++#else
++ jmp paranoid_exit1
++ CFI_ENDPROC
++#endif
++END(nmi)
++ .previous .text
++#endif
++
++KPROBE_ENTRY(int3)
++/* INTR_FRAME
++ pushq $0
++ CFI_ADJUST_CFA_OFFSET 8 */
++ zeroentry do_int3
++/* jmp paranoid_exit1
++ CFI_ENDPROC */
++END(int3)
++ .previous .text
++
++ENTRY(overflow)
++ zeroentry do_overflow
++END(overflow)
++
++ENTRY(bounds)
++ zeroentry do_bounds
++END(bounds)
++
++ENTRY(invalid_op)
++ zeroentry do_invalid_op
++END(invalid_op)
++
++ENTRY(coprocessor_segment_overrun)
++ zeroentry do_coprocessor_segment_overrun
++END(coprocessor_segment_overrun)
++
++ENTRY(reserved)
++ zeroentry do_reserved
++END(reserved)
++
++#if 0
++ /* runs on exception stack */
++ENTRY(double_fault)
++ XCPT_FRAME
++ paranoidentry do_double_fault
++ jmp paranoid_exit1
++ CFI_ENDPROC
++END(double_fault)
++#endif
++
++ENTRY(invalid_TSS)
++ errorentry do_invalid_TSS
++END(invalid_TSS)
++
++ENTRY(segment_not_present)
++ errorentry do_segment_not_present
++END(segment_not_present)
++
++ /* runs on exception stack */
++ENTRY(stack_segment)
++/* XCPT_FRAME
++ paranoidentry do_stack_segment */
++ errorentry do_stack_segment
++/* jmp paranoid_exit1
++ CFI_ENDPROC */
++END(stack_segment)
++
++KPROBE_ENTRY(general_protection)
++ errorentry do_general_protection
++END(general_protection)
++ .previous .text
++
++ENTRY(alignment_check)
++ errorentry do_alignment_check
++END(alignment_check)
++
++ENTRY(divide_error)
++ zeroentry do_divide_error
++END(divide_error)
++
++ENTRY(spurious_interrupt_bug)
++ zeroentry do_spurious_interrupt_bug
++END(spurious_interrupt_bug)
++
++#ifdef CONFIG_X86_MCE
++ /* runs on exception stack */
++ENTRY(machine_check)
++ INTR_FRAME
++ pushq $0
++ CFI_ADJUST_CFA_OFFSET 8
++ paranoidentry do_machine_check
++ jmp paranoid_exit1
++ CFI_ENDPROC
++END(machine_check)
++#endif
++
++/* Call softirq on interrupt stack. Interrupts are off. */
++ENTRY(call_softirq)
++ CFI_STARTPROC
++ push %rbp
++ CFI_ADJUST_CFA_OFFSET 8
++ CFI_REL_OFFSET rbp,0
++ mov %rsp,%rbp
++ CFI_DEF_CFA_REGISTER rbp
++ incl %gs:pda_irqcount
++ cmove %gs:pda_irqstackptr,%rsp
++ push %rbp # backlink for old unwinder
++ call __do_softirq
++ leaveq
++ CFI_DEF_CFA_REGISTER rsp
++ CFI_ADJUST_CFA_OFFSET -8
++ decl %gs:pda_irqcount
++ ret
++ CFI_ENDPROC
++ENDPROC(call_softirq)
++
++#ifdef CONFIG_STACK_UNWIND
++ENTRY(arch_unwind_init_running)
++ CFI_STARTPROC
++ movq %r15, R15(%rdi)
++ movq %r14, R14(%rdi)
++ xchgq %rsi, %rdx
++ movq %r13, R13(%rdi)
++ movq %r12, R12(%rdi)
++ xorl %eax, %eax
++ movq %rbp, RBP(%rdi)
++ movq %rbx, RBX(%rdi)
++ movq (%rsp), %rcx
++ movq %rax, R11(%rdi)
++ movq %rax, R10(%rdi)
++ movq %rax, R9(%rdi)
++ movq %rax, R8(%rdi)
++ movq %rax, RAX(%rdi)
++ movq %rax, RCX(%rdi)
++ movq %rax, RDX(%rdi)
++ movq %rax, RSI(%rdi)
++ movq %rax, RDI(%rdi)
++ movq %rax, ORIG_RAX(%rdi)
++ movq %rcx, RIP(%rdi)
++ leaq 8(%rsp), %rcx
++ movq $__KERNEL_CS, CS(%rdi)
++ movq %rax, EFLAGS(%rdi)
++ movq %rcx, RSP(%rdi)
++ movq $__KERNEL_DS, SS(%rdi)
++ jmpq *%rdx
++ CFI_ENDPROC
++ENDPROC(arch_unwind_init_running)
++#endif
+Index: head-2008-11-25/arch/x86/kernel/genapic_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/genapic_64-xen.c 2007-06-12 13:13:01.000000000 +0200
+@@ -0,0 +1,143 @@
++/*
++ * Copyright 2004 James Cleverdon, IBM.
++ * Subject to the GNU Public License, v.2
++ *
++ * Generic APIC sub-arch probe layer.
++ *
++ * Hacked for x86-64 by James Cleverdon from i386 architecture code by
++ * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
++ * James Cleverdon.
++ */
++#include <linux/threads.h>
++#include <linux/cpumask.h>
++#include <linux/string.h>
++#include <linux/kernel.h>
++#include <linux/ctype.h>
++#include <linux/init.h>
++#include <linux/module.h>
++
++#include <asm/smp.h>
++#include <asm/ipi.h>
++
++#if defined(CONFIG_ACPI)
++#include <acpi/acpi_bus.h>
++#endif
++
++/* which logical CPU number maps to which CPU (physical APIC ID) */
++u8 x86_cpu_to_apicid[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
++EXPORT_SYMBOL(x86_cpu_to_apicid);
++u8 x86_cpu_to_log_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
++
++extern struct genapic apic_cluster;
++extern struct genapic apic_flat;
++extern struct genapic apic_physflat;
++
++#ifndef CONFIG_XEN
++struct genapic *genapic = &apic_flat;
++#else
++extern struct genapic apic_xen;
++struct genapic *genapic = &apic_xen;
++#endif
++
++
++/*
++ * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
++ */
++void __init clustered_apic_check(void)
++{
++#ifndef CONFIG_XEN
++ long i;
++ u8 clusters, max_cluster;
++ u8 id;
++ u8 cluster_cnt[NUM_APIC_CLUSTERS];
++ int max_apic = 0;
++
++#if defined(CONFIG_ACPI)
++ /*
++ * Some x86_64 machines use physical APIC mode regardless of how many
++ * procs/clusters are present (x86_64 ES7000 is an example).
++ */
++ if (acpi_fadt.revision > FADT2_REVISION_ID)
++ if (acpi_fadt.force_apic_physical_destination_mode) {
++ genapic = &apic_cluster;
++ goto print;
++ }
++#endif
++
++ memset(cluster_cnt, 0, sizeof(cluster_cnt));
++ for (i = 0; i < NR_CPUS; i++) {
++ id = bios_cpu_apicid[i];
++ if (id == BAD_APICID)
++ continue;
++ if (id > max_apic)
++ max_apic = id;
++ cluster_cnt[APIC_CLUSTERID(id)]++;
++ }
++
++ /* Don't use clustered mode on AMD platforms. */
++ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
++ genapic = &apic_physflat;
++#ifndef CONFIG_HOTPLUG_CPU
++ /* In the CPU hotplug case we cannot use broadcast mode
++ because that opens a race when a CPU is removed.
++ Stay at physflat mode in this case.
++ It is bad to do this unconditionally though. Once
++ we have ACPI platform support for CPU hotplug
++ we should detect hotplug capablity from ACPI tables and
++ only do this when really needed. -AK */
++ if (max_apic <= 8)
++ genapic = &apic_flat;
++#endif
++ goto print;
++ }
++
++ clusters = 0;
++ max_cluster = 0;
++
++ for (i = 0; i < NUM_APIC_CLUSTERS; i++) {
++ if (cluster_cnt[i] > 0) {
++ ++clusters;
++ if (cluster_cnt[i] > max_cluster)
++ max_cluster = cluster_cnt[i];
++ }
++ }
++
++ /*
++ * If we have clusters <= 1 and CPUs <= 8 in cluster 0, then flat mode,
++ * else if max_cluster <= 4 and cluster_cnt[15] == 0, clustered logical
++ * else physical mode.
++ * (We don't use lowest priority delivery + HW APIC IRQ steering, so
++ * can ignore the clustered logical case and go straight to physical.)
++ */
++ if (clusters <= 1 && max_cluster <= 8 && cluster_cnt[0] == max_cluster) {
++#ifdef CONFIG_HOTPLUG_CPU
++ /* Don't use APIC shortcuts in CPU hotplug to avoid races */
++ genapic = &apic_physflat;
++#else
++ genapic = &apic_flat;
++#endif
++ } else
++ genapic = &apic_cluster;
++
++print:
++#else
++ /* hardcode to xen apic functions */
++ genapic = &apic_xen;
++#endif
++ printk(KERN_INFO "Setting APIC routing to %s\n", genapic->name);
++}
++
++/* Same for both flat and clustered. */
++
++#ifdef CONFIG_XEN
++extern void xen_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest);
++#endif
++
++void send_IPI_self(int vector)
++{
++#ifndef CONFIG_XEN
++ __send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
++#else
++ xen_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
++#endif
++}
+Index: head-2008-11-25/arch/x86/kernel/genapic_xen_64.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/genapic_xen_64.c 2007-06-12 13:13:01.000000000 +0200
+@@ -0,0 +1,161 @@
++/*
++ * Copyright 2004 James Cleverdon, IBM.
++ * Subject to the GNU Public License, v.2
++ *
++ * Xen APIC subarch code. Maximum 8 CPUs, logical delivery.
++ *
++ * Hacked for x86-64 by James Cleverdon from i386 architecture code by
++ * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
++ * James Cleverdon.
++ *
++ * Hacked to pieces for Xen by Chris Wright.
++ */
++#include <linux/threads.h>
++#include <linux/cpumask.h>
++#include <linux/string.h>
++#include <linux/kernel.h>
++#include <linux/ctype.h>
++#include <linux/init.h>
++#ifdef CONFIG_XEN_PRIVILEGED_GUEST
++#include <asm/smp.h>
++#include <asm/ipi.h>
++#else
++#include <asm/apic.h>
++#include <asm/apicdef.h>
++#include <asm/genapic.h>
++#endif
++#include <xen/evtchn.h>
++
++DECLARE_PER_CPU(int, ipi_to_irq[NR_IPIS]);
++
++static inline void __send_IPI_one(unsigned int cpu, int vector)
++{
++ int irq = per_cpu(ipi_to_irq, cpu)[vector];
++ BUG_ON(irq < 0);
++ notify_remote_via_irq(irq);
++}
++
++void xen_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest)
++{
++ int cpu;
++
++ switch (shortcut) {
++ case APIC_DEST_SELF:
++ __send_IPI_one(smp_processor_id(), vector);
++ break;
++ case APIC_DEST_ALLBUT:
++ for (cpu = 0; cpu < NR_CPUS; ++cpu) {
++ if (cpu == smp_processor_id())
++ continue;
++ if (cpu_isset(cpu, cpu_online_map)) {
++ __send_IPI_one(cpu, vector);
++ }
++ }
++ break;
++ case APIC_DEST_ALLINC:
++ for (cpu = 0; cpu < NR_CPUS; ++cpu) {
++ if (cpu_isset(cpu, cpu_online_map)) {
++ __send_IPI_one(cpu, vector);
++ }
++ }
++ break;
++ default:
++ printk("XXXXXX __send_IPI_shortcut %08x vector %d\n", shortcut,
++ vector);
++ break;
++ }
++}
++
++static cpumask_t xen_target_cpus(void)
++{
++ return cpu_online_map;
++}
++
++/*
++ * Set up the logical destination ID.
++ * Do nothing, not called now.
++ */
++static void xen_init_apic_ldr(void)
++{
++ Dprintk("%s\n", __FUNCTION__);
++ return;
++}
++
++static void xen_send_IPI_allbutself(int vector)
++{
++ /*
++ * if there are no other CPUs in the system then
++ * we get an APIC send error if we try to broadcast.
++ * thus we have to avoid sending IPIs in this case.
++ */
++ Dprintk("%s\n", __FUNCTION__);
++ if (num_online_cpus() > 1)
++ xen_send_IPI_shortcut(APIC_DEST_ALLBUT, vector, APIC_DEST_LOGICAL);
++}
++
++static void xen_send_IPI_all(int vector)
++{
++ Dprintk("%s\n", __FUNCTION__);
++ xen_send_IPI_shortcut(APIC_DEST_ALLINC, vector, APIC_DEST_LOGICAL);
++}
++
++static void xen_send_IPI_mask(cpumask_t cpumask, int vector)
++{
++ unsigned long mask = cpus_addr(cpumask)[0];
++ unsigned int cpu;
++ unsigned long flags;
++
++ Dprintk("%s\n", __FUNCTION__);
++ local_irq_save(flags);
++ WARN_ON(mask & ~cpus_addr(cpu_online_map)[0]);
++
++ for (cpu = 0; cpu < NR_CPUS; ++cpu) {
++ if (cpu_isset(cpu, cpumask)) {
++ __send_IPI_one(cpu, vector);
++ }
++ }
++ local_irq_restore(flags);
++}
++
++#ifdef CONFIG_XEN_PRIVILEGED_GUEST
++static int xen_apic_id_registered(void)
++{
++ /* better be set */
++ Dprintk("%s\n", __FUNCTION__);
++ return physid_isset(smp_processor_id(), phys_cpu_present_map);
++}
++#endif
++
++static unsigned int xen_cpu_mask_to_apicid(cpumask_t cpumask)
++{
++ Dprintk("%s\n", __FUNCTION__);
++ return cpus_addr(cpumask)[0] & APIC_ALL_CPUS;
++}
++
++static unsigned int phys_pkg_id(int index_msb)
++{
++ u32 ebx;
++
++ Dprintk("%s\n", __FUNCTION__);
++ ebx = cpuid_ebx(1);
++ return ((ebx >> 24) & 0xFF) >> index_msb;
++}
++
++struct genapic apic_xen = {
++ .name = "xen",
++#ifdef CONFIG_XEN_PRIVILEGED_GUEST
++ .int_delivery_mode = dest_LowestPrio,
++#endif
++ .int_dest_mode = (APIC_DEST_LOGICAL != 0),
++ .int_delivery_dest = APIC_DEST_LOGICAL | APIC_DM_LOWEST,
++ .target_cpus = xen_target_cpus,
++#ifdef CONFIG_XEN_PRIVILEGED_GUEST
++ .apic_id_registered = xen_apic_id_registered,
++#endif
++ .init_apic_ldr = xen_init_apic_ldr,
++ .send_IPI_all = xen_send_IPI_all,
++ .send_IPI_allbutself = xen_send_IPI_allbutself,
++ .send_IPI_mask = xen_send_IPI_mask,
++ .cpu_mask_to_apicid = xen_cpu_mask_to_apicid,
++ .phys_pkg_id = phys_pkg_id,
++};
+Index: head-2008-11-25/arch/x86/kernel/head_64-xen.S
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/head_64-xen.S 2007-08-06 15:10:49.000000000 +0200
+@@ -0,0 +1,214 @@
++/*
++ * linux/arch/x86_64/kernel/head.S -- start in 32bit and switch to 64bit
++ *
++ * Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
++ * Copyright (C) 2000 Pavel Machek <pavel@suse.cz>
++ * Copyright (C) 2000 Karsten Keil <kkeil@suse.de>
++ * Copyright (C) 2001,2002 Andi Kleen <ak@suse.de>
++ *
++ * $Id: head.S,v 1.49 2002/03/19 17:39:25 ak Exp $
++ *
++ * Jun Nakajima <jun.nakajima@intel.com>
++ * Modified for Xen
++ */
++
++
++#include <linux/linkage.h>
++#include <linux/threads.h>
++#include <linux/init.h>
++#include <linux/elfnote.h>
++#include <asm/desc.h>
++#include <asm/segment.h>
++#include <asm/page.h>
++#include <asm/msr.h>
++#include <asm/cache.h>
++#include <asm/dwarf2.h>
++#include <xen/interface/elfnote.h>
++
++ .section .bootstrap.text, "ax", @progbits
++ .code64
++ .globl startup_64
++startup_64:
++ movq $(init_thread_union+THREAD_SIZE-8),%rsp
++
++ /* rsi is pointer to startup info structure.
++ pass it to C */
++ movq %rsi,%rdi
++ pushq $0 # fake return address
++ jmp x86_64_start_kernel
++
++#ifdef CONFIG_ACPI_SLEEP
++.org 0xf00
++ .globl pGDT32
++pGDT32:
++ .word gdt_end-cpu_gdt_table-1
++ .long cpu_gdt_table-__START_KERNEL_map
++#endif
++ENTRY(stext)
++ENTRY(_stext)
++
++ $page = 0
++#define NEXT_PAGE(name) \
++ $page = $page + 1; \
++ .org $page * 0x1000; \
++ phys_##name = $page * 0x1000 + __PHYSICAL_START; \
++ENTRY(name)
++
++NEXT_PAGE(init_level4_pgt)
++ /* This gets initialized in x86_64_start_kernel */
++ .fill 512,8,0
++NEXT_PAGE(init_level4_user_pgt)
++ /*
++ * We update two pgd entries to make kernel and user pgd consistent
++ * at pgd_populate(). It can be used for kernel modules. So we place
++ * this page here for those cases to avoid memory corruption.
++ * We also use this page to establish the initial mapping for the
++ * vsyscall area.
++ */
++ .fill 512,8,0
++
++NEXT_PAGE(level3_kernel_pgt)
++ .fill 512,8,0
++
++ /*
++ * This is used for vsyscall area mapping as we have a different
++ * level4 page table for user.
++ */
++NEXT_PAGE(level3_user_pgt)
++ .fill 512,8,0
++
++NEXT_PAGE(level2_kernel_pgt)
++ .fill 512,8,0
++
++NEXT_PAGE(hypercall_page)
++ CFI_STARTPROC
++ .rept 0x1000 / 0x20
++ .skip 1 /* push %rcx */
++ CFI_ADJUST_CFA_OFFSET 8
++ CFI_REL_OFFSET rcx,0
++ .skip 2 /* push %r11 */
++ CFI_ADJUST_CFA_OFFSET 8
++ CFI_REL_OFFSET rcx,0
++ .skip 5 /* mov $#,%eax */
++ .skip 2 /* syscall */
++ .skip 2 /* pop %r11 */
++ CFI_ADJUST_CFA_OFFSET -8
++ CFI_RESTORE r11
++ .skip 1 /* pop %rcx */
++ CFI_ADJUST_CFA_OFFSET -8
++ CFI_RESTORE rcx
++ .align 0x20,0 /* ret */
++ .endr
++ CFI_ENDPROC
++
++#undef NEXT_PAGE
++
++ .data
++/* Just dummy symbol to allow compilation. Not used in sleep path */
++#ifdef CONFIG_ACPI_SLEEP
++ .align PAGE_SIZE
++ENTRY(wakeup_level4_pgt)
++ .fill 512,8,0
++#endif
++
++ .data
++
++ .align 16
++ .globl cpu_gdt_descr
++cpu_gdt_descr:
++ .word gdt_end-cpu_gdt_table-1
++gdt:
++ .quad cpu_gdt_table
++#ifdef CONFIG_SMP
++ .rept NR_CPUS-1
++ .word 0
++ .quad 0
++ .endr
++#endif
++
++/* We need valid kernel segments for data and code in long mode too
++ * IRET will check the segment types kkeil 2000/10/28
++ * Also sysret mandates a special GDT layout
++ */
++
++ .section .data.page_aligned, "aw"
++ .align PAGE_SIZE
++
++/* The TLS descriptors are currently at a different place compared to i386.
++ Hopefully nobody expects them at a fixed place (Wine?) */
++
++ENTRY(cpu_gdt_table)
++ .quad 0x0000000000000000 /* NULL descriptor */
++ .quad 0x0 /* unused */
++ .quad 0x00af9a000000ffff /* __KERNEL_CS */
++ .quad 0x00cf92000000ffff /* __KERNEL_DS */
++ .quad 0x00cffa000000ffff /* __USER32_CS */
++ .quad 0x00cff2000000ffff /* __USER_DS, __USER32_DS */
++ .quad 0x00affa000000ffff /* __USER_CS */
++ .quad 0x00cf9a000000ffff /* __KERNEL32_CS */
++ .quad 0,0 /* TSS */
++ .quad 0,0 /* LDT */
++ .quad 0,0,0 /* three TLS descriptors */
++ .quad 0 /* unused */
++gdt_end:
++ /* asm/segment.h:GDT_ENTRIES must match this */
++ /* This should be a multiple of the cache line size */
++ /* GDTs of other CPUs are now dynamically allocated */
++
++ /* zero the remaining page */
++ .fill PAGE_SIZE / 8 - GDT_ENTRIES,8,0
++
++ .section .bss.page_aligned, "aw", @nobits
++ .align PAGE_SIZE
++ENTRY(empty_zero_page)
++ .skip PAGE_SIZE
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++/*
++ * __xen_guest information
++ */
++.macro utoh value
++ .if (\value) < 0 || (\value) >= 0x10
++ utoh (((\value)>>4)&0x0fffffffffffffff)
++ .endif
++ .if ((\value) & 0xf) < 10
++ .byte '0' + ((\value) & 0xf)
++ .else
++ .byte 'A' + ((\value) & 0xf) - 10
++ .endif
++.endm
++
++.section __xen_guest
++ .ascii "GUEST_OS=linux,GUEST_VER=2.6"
++ .ascii ",XEN_VER=xen-3.0"
++ .ascii ",VIRT_BASE=0x"
++ utoh __START_KERNEL_map
++ .ascii ",ELF_PADDR_OFFSET=0x"
++ utoh __START_KERNEL_map
++ .ascii ",VIRT_ENTRY=0x"
++ utoh (__START_KERNEL_map + __PHYSICAL_START)
++ .ascii ",HYPERCALL_PAGE=0x"
++ utoh (phys_hypercall_page >> PAGE_SHIFT)
++ .ascii ",FEATURES=writable_page_tables"
++ .ascii "|writable_descriptor_tables"
++ .ascii "|auto_translated_physmap"
++ .ascii "|supervisor_mode_kernel"
++ .ascii ",LOADER=generic"
++ .byte 0
++#endif /* CONFIG_XEN_COMPAT <= 0x030002 */
++
++ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "linux")
++ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, "2.6")
++ ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0")
++ ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .quad, __START_KERNEL_map)
++#if CONFIG_XEN_COMPAT <= 0x030002
++ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .quad, __START_KERNEL_map)
++#else
++ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .quad, 0)
++#endif
++ ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .quad, startup_64)
++ ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .quad, hypercall_page)
++ ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .quad, _PAGE_PRESENT,_PAGE_PRESENT)
++ ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
++ ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic")
++ ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long, 1)
+Index: head-2008-11-25/arch/x86/kernel/head64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/head64-xen.c 2007-06-12 13:13:01.000000000 +0200
+@@ -0,0 +1,162 @@
++/*
++ * linux/arch/x86_64/kernel/head64.c -- prepare to run common code
++ *
++ * Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
++ *
++ * Jun Nakajima <jun.nakajima@intel.com>
++ * Modified for Xen.
++ */
++
++#include <linux/init.h>
++#include <linux/linkage.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/string.h>
++#include <linux/percpu.h>
++#include <linux/module.h>
++
++#include <asm/processor.h>
++#include <asm/proto.h>
++#include <asm/smp.h>
++#include <asm/bootsetup.h>
++#include <asm/setup.h>
++#include <asm/desc.h>
++#include <asm/pgtable.h>
++#include <asm/sections.h>
++
++unsigned long start_pfn;
++
++/* Don't add a printk in there. printk relies on the PDA which is not initialized
++ yet. */
++#if 0
++static void __init clear_bss(void)
++{
++ memset(__bss_start, 0,
++ (unsigned long) __bss_stop - (unsigned long) __bss_start);
++}
++#endif
++
++#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
++#define OLD_CL_MAGIC_ADDR 0x90020
++#define OLD_CL_MAGIC 0xA33F
++#define OLD_CL_BASE_ADDR 0x90000
++#define OLD_CL_OFFSET 0x90022
++
++extern char saved_command_line[];
++
++static void __init copy_bootdata(char *real_mode_data)
++{
++#ifndef CONFIG_XEN
++ int new_data;
++ char * command_line;
++
++ memcpy(x86_boot_params, real_mode_data, BOOT_PARAM_SIZE);
++ new_data = *(int *) (x86_boot_params + NEW_CL_POINTER);
++ if (!new_data) {
++ if (OLD_CL_MAGIC != * (u16 *) OLD_CL_MAGIC_ADDR) {
++ printk("so old bootloader that it does not support commandline?!\n");
++ return;
++ }
++ new_data = OLD_CL_BASE_ADDR + * (u16 *) OLD_CL_OFFSET;
++ printk("old bootloader convention, maybe loadlin?\n");
++ }
++ command_line = (char *) ((u64)(new_data));
++ memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
++#else
++ int max_cmdline;
++
++ if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
++ max_cmdline = COMMAND_LINE_SIZE;
++ memcpy(saved_command_line, xen_start_info->cmd_line, max_cmdline);
++ saved_command_line[max_cmdline-1] = '\0';
++#endif
++ printk("Bootdata ok (command line is %s)\n", saved_command_line);
++}
++
++static void __init setup_boot_cpu_data(void)
++{
++ unsigned int dummy, eax;
++
++ /* get vendor info */
++ cpuid(0, (unsigned int *)&boot_cpu_data.cpuid_level,
++ (unsigned int *)&boot_cpu_data.x86_vendor_id[0],
++ (unsigned int *)&boot_cpu_data.x86_vendor_id[8],
++ (unsigned int *)&boot_cpu_data.x86_vendor_id[4]);
++
++ /* get cpu type */
++ cpuid(1, &eax, &dummy, &dummy,
++ (unsigned int *) &boot_cpu_data.x86_capability);
++ boot_cpu_data.x86 = (eax >> 8) & 0xf;
++ boot_cpu_data.x86_model = (eax >> 4) & 0xf;
++ boot_cpu_data.x86_mask = eax & 0xf;
++}
++
++#include <xen/interface/memory.h>
++unsigned long *machine_to_phys_mapping;
++EXPORT_SYMBOL(machine_to_phys_mapping);
++unsigned int machine_to_phys_order;
++EXPORT_SYMBOL(machine_to_phys_order);
++
++void __init x86_64_start_kernel(char * real_mode_data)
++{
++ struct xen_machphys_mapping mapping;
++ unsigned long machine_to_phys_nr_ents;
++ char *s;
++ int i;
++
++ setup_xen_features();
++
++ xen_start_info = (struct start_info *)real_mode_data;
++ if (!xen_feature(XENFEAT_auto_translated_physmap))
++ phys_to_machine_mapping =
++ (unsigned long *)xen_start_info->mfn_list;
++ start_pfn = (__pa(xen_start_info->pt_base) >> PAGE_SHIFT) +
++ xen_start_info->nr_pt_frames;
++
++ machine_to_phys_mapping = (unsigned long *)MACH2PHYS_VIRT_START;
++ machine_to_phys_nr_ents = MACH2PHYS_NR_ENTRIES;
++ if (HYPERVISOR_memory_op(XENMEM_machphys_mapping, &mapping) == 0) {
++ machine_to_phys_mapping = (unsigned long *)mapping.v_start;
++ machine_to_phys_nr_ents = mapping.max_mfn + 1;
++ }
++ while ((1UL << machine_to_phys_order) < machine_to_phys_nr_ents )
++ machine_to_phys_order++;
++
++#if 0
++ for (i = 0; i < 256; i++)
++ set_intr_gate(i, early_idt_handler);
++ asm volatile("lidt %0" :: "m" (idt_descr));
++#endif
++
++ /*
++ * This must be called really, really early:
++ */
++ lockdep_init();
++
++ for (i = 0; i < NR_CPUS; i++)
++ cpu_pda(i) = &boot_cpu_pda[i];
++
++ pda_init(0);
++ copy_bootdata(real_mode_data);
++#ifdef CONFIG_SMP
++ cpu_set(0, cpu_online_map);
++#endif
++ s = strstr(saved_command_line, "earlyprintk=");
++ if (s != NULL)
++ setup_early_printk(strchr(s, '=') + 1);
++#ifdef CONFIG_NUMA
++ s = strstr(saved_command_line, "numa=");
++ if (s != NULL)
++ numa_setup(s+5);
++#endif
++#ifdef CONFIG_X86_IO_APIC
++ if (strstr(saved_command_line, "disableapic"))
++ disable_apic = 1;
++#endif
++ /* You need early console to see that */
++ if (__pa_symbol(&_end) >= KERNEL_TEXT_SIZE)
++ panic("Kernel too big for kernel mapping\n");
++
++ setup_boot_cpu_data();
++ start_kernel();
++}
+Index: head-2008-11-25/arch/x86/kernel/io_apic_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/io_apic_64-xen.c 2008-11-25 12:22:34.000000000 +0100
+@@ -0,0 +1,2268 @@
++/*
++ * Intel IO-APIC support for multi-Pentium hosts.
++ *
++ * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar, Hajnalka Szabo
++ *
++ * Many thanks to Stig Venaas for trying out countless experimental
++ * patches and reporting/debugging problems patiently!
++ *
++ * (c) 1999, Multiple IO-APIC support, developed by
++ * Ken-ichi Yaku <yaku@css1.kbnes.nec.co.jp> and
++ * Hidemi Kishimoto <kisimoto@css1.kbnes.nec.co.jp>,
++ * further tested and cleaned up by Zach Brown <zab@redhat.com>
++ * and Ingo Molnar <mingo@redhat.com>
++ *
++ * Fixes
++ * Maciej W. Rozycki : Bits for genuine 82489DX APICs;
++ * thanks to Eric Gilmore
++ * and Rolf G. Tews
++ * for testing these extensively
++ * Paul Diefenbaugh : Added full ACPI support
++ */
++
++#include <linux/mm.h>
++#include <linux/interrupt.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/sched.h>
++#include <linux/smp_lock.h>
++#include <linux/mc146818rtc.h>
++#include <linux/acpi.h>
++#include <linux/sysdev.h>
++#ifdef CONFIG_ACPI
++#include <acpi/acpi_bus.h>
++#endif
++
++#include <asm/io.h>
++#include <asm/smp.h>
++#include <asm/desc.h>
++#include <asm/proto.h>
++#include <asm/mach_apic.h>
++#include <asm/acpi.h>
++#include <asm/dma.h>
++#include <asm/nmi.h>
++
++#define __apicdebuginit __init
++
++int sis_apic_bug; /* not actually supported, dummy for compile */
++
++static int no_timer_check;
++
++int disable_timer_pin_1 __initdata;
++
++#ifndef CONFIG_XEN
++int timer_over_8254 __initdata = 0;
++
++/* Where if anywhere is the i8259 connect in external int mode */
++static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
++#endif
++
++static DEFINE_SPINLOCK(ioapic_lock);
++static DEFINE_SPINLOCK(vector_lock);
++
++/*
++ * # of IRQ routing registers
++ */
++int nr_ioapic_registers[MAX_IO_APICS];
++
++/*
++ * Rough estimation of how many shared IRQs there are, can
++ * be changed anytime.
++ */
++#define MAX_PLUS_SHARED_IRQS NR_IRQ_VECTORS
++#define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS)
++
++/*
++ * This is performance-critical, we want to do it O(1)
++ *
++ * the indexing order of this array favors 1:1 mappings
++ * between pins and IRQs.
++ */
++
++static struct irq_pin_list {
++ short apic, pin, next;
++} irq_2_pin[PIN_MAP_SIZE];
++
++int vector_irq[NR_VECTORS] __read_mostly = { [0 ... NR_VECTORS - 1] = -1};
++#ifdef CONFIG_PCI_MSI
++#define vector_to_irq(vector) \
++ (platform_legacy_irq(vector) ? vector : vector_irq[vector])
++#else
++#define vector_to_irq(vector) (vector)
++#endif
++
++#ifdef CONFIG_XEN
++
++#include <xen/interface/xen.h>
++#include <xen/interface/physdev.h>
++#include <xen/evtchn.h>
++
++/* Fake i8259 */
++#define make_8259A_irq(_irq) (io_apic_irqs &= ~(1UL<<(_irq)))
++#define disable_8259A_irq(_irq) ((void)0)
++#define i8259A_irq_pending(_irq) (0)
++
++unsigned long io_apic_irqs;
++
++static inline unsigned int xen_io_apic_read(unsigned int apic, unsigned int reg)
++{
++ struct physdev_apic apic_op;
++ int ret;
++
++ apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.reg = reg;
++ ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
++ if (ret)
++ return ret;
++ return apic_op.value;
++}
++
++static inline void xen_io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
++{
++ struct physdev_apic apic_op;
++
++ apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.reg = reg;
++ apic_op.value = value;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op));
++}
++
++#define io_apic_read(a,r) xen_io_apic_read(a,r)
++#define io_apic_write(a,r,v) xen_io_apic_write(a,r,v)
++
++#define clear_IO_APIC() ((void)0)
++
++#else
++
++#ifdef CONFIG_SMP
++static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
++{
++ unsigned long flags;
++ unsigned int dest;
++ cpumask_t tmp;
++
++ cpus_and(tmp, mask, cpu_online_map);
++ if (cpus_empty(tmp))
++ tmp = TARGET_CPUS;
++
++ cpus_and(mask, tmp, CPU_MASK_ALL);
++
++ dest = cpu_mask_to_apicid(mask);
++
++ /*
++ * Only the high 8 bits are valid.
++ */
++ dest = SET_APIC_LOGICAL_ID(dest);
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ __DO_ACTION(1, = dest, )
++ set_irq_info(irq, mask);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++#endif
++
++#endif /* !CONFIG_XEN */
++
++/*
++ * The common case is 1:1 IRQ<->pin mappings. Sometimes there are
++ * shared ISA-space IRQs, so we have to support them. We are super
++ * fast in the common case, and fast for shared ISA-space IRQs.
++ */
++static void add_pin_to_irq(unsigned int irq, int apic, int pin)
++{
++ static int first_free_entry = NR_IRQS;
++ struct irq_pin_list *entry = irq_2_pin + irq;
++
++ BUG_ON(irq >= NR_IRQS);
++ while (entry->next)
++ entry = irq_2_pin + entry->next;
++
++ if (entry->pin != -1) {
++ entry->next = first_free_entry;
++ entry = irq_2_pin + entry->next;
++ if (++first_free_entry >= PIN_MAP_SIZE)
++ panic("io_apic.c: ran out of irq_2_pin entries!");
++ }
++ entry->apic = apic;
++ entry->pin = pin;
++}
++
++#ifndef CONFIG_XEN
++#define __DO_ACTION(R, ACTION, FINAL) \
++ \
++{ \
++ int pin; \
++ struct irq_pin_list *entry = irq_2_pin + irq; \
++ \
++ BUG_ON(irq >= NR_IRQS); \
++ for (;;) { \
++ unsigned int reg; \
++ pin = entry->pin; \
++ if (pin == -1) \
++ break; \
++ reg = io_apic_read(entry->apic, 0x10 + R + pin*2); \
++ reg ACTION; \
++ io_apic_modify(entry->apic, reg); \
++ if (!entry->next) \
++ break; \
++ entry = irq_2_pin + entry->next; \
++ } \
++ FINAL; \
++}
++
++#define DO_ACTION(name,R,ACTION, FINAL) \
++ \
++ static void name##_IO_APIC_irq (unsigned int irq) \
++ __DO_ACTION(R, ACTION, FINAL)
++
++DO_ACTION( __mask, 0, |= 0x00010000, io_apic_sync(entry->apic) )
++ /* mask = 1 */
++DO_ACTION( __unmask, 0, &= 0xfffeffff, )
++ /* mask = 0 */
++
++static void mask_IO_APIC_irq (unsigned int irq)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ __mask_IO_APIC_irq(irq);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++static void unmask_IO_APIC_irq (unsigned int irq)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ __unmask_IO_APIC_irq(irq);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
++{
++ struct IO_APIC_route_entry entry;
++ unsigned long flags;
++
++ /* Check delivery_mode to be sure we're not clearing an SMI pin */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ *(((int*)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
++ *(((int*)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ if (entry.delivery_mode == dest_SMI)
++ return;
++ /*
++ * Disable it in the IO-APIC irq-routing table:
++ */
++ memset(&entry, 0, sizeof(entry));
++ entry.mask = 1;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry) + 0));
++ io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry) + 1));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++static void clear_IO_APIC (void)
++{
++ int apic, pin;
++
++ for (apic = 0; apic < nr_ioapics; apic++)
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++)
++ clear_IO_APIC_pin(apic, pin);
++}
++
++#endif /* !CONFIG_XEN */
++
++static u8 gsi_2_irq[NR_IRQ_VECTORS] = { [0 ... NR_IRQ_VECTORS-1] = 0xFF };
++
++/*
++ * support for broken MP BIOSs, enables hand-redirection of PIRQ0-7 to
++ * specific CPU-side IRQs.
++ */
++
++#define MAX_PIRQS 8
++static int pirq_entries [MAX_PIRQS];
++static int pirqs_enabled;
++int skip_ioapic_setup;
++int ioapic_force;
++
++/* dummy parsing: see setup.c */
++
++static int __init disable_ioapic_setup(char *str)
++{
++ skip_ioapic_setup = 1;
++ return 1;
++}
++
++static int __init enable_ioapic_setup(char *str)
++{
++ ioapic_force = 1;
++ skip_ioapic_setup = 0;
++ return 1;
++}
++
++__setup("noapic", disable_ioapic_setup);
++__setup("apic", enable_ioapic_setup);
++
++#ifndef CONFIG_XEN
++static int __init setup_disable_8254_timer(char *s)
++{
++ timer_over_8254 = -1;
++ return 1;
++}
++static int __init setup_enable_8254_timer(char *s)
++{
++ timer_over_8254 = 2;
++ return 1;
++}
++
++__setup("disable_8254_timer", setup_disable_8254_timer);
++__setup("enable_8254_timer", setup_enable_8254_timer);
++#endif /* !CONFIG_XEN */
++
++#include <asm/pci-direct.h>
++#include <linux/pci_ids.h>
++#include <linux/pci.h>
++
++
++#ifdef CONFIG_ACPI
++
++static int nvidia_hpet_detected __initdata;
++
++static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
++{
++ nvidia_hpet_detected = 1;
++ return 0;
++}
++#endif
++
++/* Temporary Hack. Nvidia and VIA boards currently only work with IO-APIC
++ off. Check for an Nvidia or VIA PCI bridge and turn it off.
++ Use pci direct infrastructure because this runs before the PCI subsystem.
++
++ Can be overwritten with "apic"
++
++ And another hack to disable the IOMMU on VIA chipsets.
++
++ ... and others. Really should move this somewhere else.
++
++ Kludge-O-Rama. */
++void __init check_ioapic(void)
++{
++ int num,slot,func;
++ /* Poor man's PCI discovery */
++ for (num = 0; num < 32; num++) {
++ for (slot = 0; slot < 32; slot++) {
++ for (func = 0; func < 8; func++) {
++ u32 class;
++ u32 vendor;
++ u8 type;
++ class = read_pci_config(num,slot,func,
++ PCI_CLASS_REVISION);
++ if (class == 0xffffffff)
++ break;
++
++ if ((class >> 16) != PCI_CLASS_BRIDGE_PCI)
++ continue;
++
++ vendor = read_pci_config(num, slot, func,
++ PCI_VENDOR_ID);
++ vendor &= 0xffff;
++ switch (vendor) {
++ case PCI_VENDOR_ID_VIA:
++#ifdef CONFIG_IOMMU
++ if ((end_pfn > MAX_DMA32_PFN ||
++ force_iommu) &&
++ !iommu_aperture_allowed) {
++ printk(KERN_INFO
++ "Looks like a VIA chipset. Disabling IOMMU. Override with \"iommu=allowed\"\n");
++ iommu_aperture_disabled = 1;
++ }
++#endif
++ return;
++ case PCI_VENDOR_ID_NVIDIA:
++#ifdef CONFIG_ACPI
++ /*
++ * All timer overrides on Nvidia are
++ * wrong unless HPET is enabled.
++ */
++ nvidia_hpet_detected = 0;
++ acpi_table_parse(ACPI_HPET,
++ nvidia_hpet_check);
++ if (nvidia_hpet_detected == 0) {
++ acpi_skip_timer_override = 1;
++ printk(KERN_INFO "Nvidia board "
++ "detected. Ignoring ACPI "
++ "timer override.\n");
++ }
++#endif
++ /* RED-PEN skip them on mptables too? */
++ return;
++ case PCI_VENDOR_ID_ATI:
++
++ /* This should be actually default, but
++ for 2.6.16 let's do it for ATI only where
++ it's really needed. */
++#ifndef CONFIG_XEN
++ if (timer_over_8254 == 1) {
++ timer_over_8254 = 0;
++ printk(KERN_INFO
++ "ATI board detected. Disabling timer routing over 8254.\n");
++ }
++#endif
++ return;
++ }
++
++
++ /* No multi-function device? */
++ type = read_pci_config_byte(num,slot,func,
++ PCI_HEADER_TYPE);
++ if (!(type & 0x80))
++ break;
++ }
++ }
++ }
++}
++
++static int __init ioapic_pirq_setup(char *str)
++{
++ int i, max;
++ int ints[MAX_PIRQS+1];
++
++ get_options(str, ARRAY_SIZE(ints), ints);
++
++ for (i = 0; i < MAX_PIRQS; i++)
++ pirq_entries[i] = -1;
++
++ pirqs_enabled = 1;
++ apic_printk(APIC_VERBOSE, "PIRQ redirection, working around broken MP-BIOS.\n");
++ max = MAX_PIRQS;
++ if (ints[0] < MAX_PIRQS)
++ max = ints[0];
++
++ for (i = 0; i < max; i++) {
++ apic_printk(APIC_VERBOSE, "... PIRQ%d -> IRQ %d\n", i, ints[i+1]);
++ /*
++ * PIRQs are mapped upside down, usually.
++ */
++ pirq_entries[MAX_PIRQS-i-1] = ints[i+1];
++ }
++ return 1;
++}
++
++__setup("pirq=", ioapic_pirq_setup);
++
++/*
++ * Find the IRQ entry number of a certain pin.
++ */
++static int find_irq_entry(int apic, int pin, int type)
++{
++ int i;
++
++ for (i = 0; i < mp_irq_entries; i++)
++ if (mp_irqs[i].mpc_irqtype == type &&
++ (mp_irqs[i].mpc_dstapic == mp_ioapics[apic].mpc_apicid ||
++ mp_irqs[i].mpc_dstapic == MP_APIC_ALL) &&
++ mp_irqs[i].mpc_dstirq == pin)
++ return i;
++
++ return -1;
++}
++
++#ifndef CONFIG_XEN
++/*
++ * Find the pin to which IRQ[irq] (ISA) is connected
++ */
++static int __init find_isa_irq_pin(int irq, int type)
++{
++ int i;
++
++ for (i = 0; i < mp_irq_entries; i++) {
++ int lbus = mp_irqs[i].mpc_srcbus;
++
++ if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_MCA) &&
++ (mp_irqs[i].mpc_irqtype == type) &&
++ (mp_irqs[i].mpc_srcbusirq == irq))
++
++ return mp_irqs[i].mpc_dstirq;
++ }
++ return -1;
++}
++
++static int __init find_isa_irq_apic(int irq, int type)
++{
++ int i;
++
++ for (i = 0; i < mp_irq_entries; i++) {
++ int lbus = mp_irqs[i].mpc_srcbus;
++
++ if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
++ mp_bus_id_to_type[lbus] == MP_BUS_MCA) &&
++ (mp_irqs[i].mpc_irqtype == type) &&
++ (mp_irqs[i].mpc_srcbusirq == irq))
++ break;
++ }
++ if (i < mp_irq_entries) {
++ int apic;
++ for(apic = 0; apic < nr_ioapics; apic++) {
++ if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic)
++ return apic;
++ }
++ }
++
++ return -1;
++}
++#endif
++
++/*
++ * Find a specific PCI IRQ entry.
++ * Not an __init, possibly needed by modules
++ */
++static int pin_2_irq(int idx, int apic, int pin);
++
++int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
++{
++ int apic, i, best_guess = -1;
++
++ apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n",
++ bus, slot, pin);
++ if (mp_bus_id_to_pci_bus[bus] == -1) {
++ apic_printk(APIC_VERBOSE, "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
++ return -1;
++ }
++ for (i = 0; i < mp_irq_entries; i++) {
++ int lbus = mp_irqs[i].mpc_srcbus;
++
++ for (apic = 0; apic < nr_ioapics; apic++)
++ if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic ||
++ mp_irqs[i].mpc_dstapic == MP_APIC_ALL)
++ break;
++
++ if ((mp_bus_id_to_type[lbus] == MP_BUS_PCI) &&
++ !mp_irqs[i].mpc_irqtype &&
++ (bus == lbus) &&
++ (slot == ((mp_irqs[i].mpc_srcbusirq >> 2) & 0x1f))) {
++ int irq = pin_2_irq(i,apic,mp_irqs[i].mpc_dstirq);
++
++ if (!(apic || IO_APIC_IRQ(irq)))
++ continue;
++
++ if (pin == (mp_irqs[i].mpc_srcbusirq & 3))
++ return irq;
++ /*
++ * Use the first all-but-pin matching entry as a
++ * best-guess fuzzy result for broken mptables.
++ */
++ if (best_guess < 0)
++ best_guess = irq;
++ }
++ }
++ BUG_ON(best_guess >= NR_IRQS);
++ return best_guess;
++}
++
++/*
++ * EISA Edge/Level control register, ELCR
++ */
++static int EISA_ELCR(unsigned int irq)
++{
++ if (irq < 16) {
++ unsigned int port = 0x4d0 + (irq >> 3);
++ return (inb(port) >> (irq & 7)) & 1;
++ }
++ apic_printk(APIC_VERBOSE, "Broken MPtable reports ISA irq %d\n", irq);
++ return 0;
++}
++
++/* EISA interrupts are always polarity zero and can be edge or level
++ * trigger depending on the ELCR value. If an interrupt is listed as
++ * EISA conforming in the MP table, that means its trigger type must
++ * be read in from the ELCR */
++
++#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mpc_srcbusirq))
++#define default_EISA_polarity(idx) (0)
++
++/* ISA interrupts are always polarity zero edge triggered,
++ * when listed as conforming in the MP table. */
++
++#define default_ISA_trigger(idx) (0)
++#define default_ISA_polarity(idx) (0)
++
++/* PCI interrupts are always polarity one level triggered,
++ * when listed as conforming in the MP table. */
++
++#define default_PCI_trigger(idx) (1)
++#define default_PCI_polarity(idx) (1)
++
++/* MCA interrupts are always polarity zero level triggered,
++ * when listed as conforming in the MP table. */
++
++#define default_MCA_trigger(idx) (1)
++#define default_MCA_polarity(idx) (0)
++
++static int __init MPBIOS_polarity(int idx)
++{
++ int bus = mp_irqs[idx].mpc_srcbus;
++ int polarity;
++
++ /*
++ * Determine IRQ line polarity (high active or low active):
++ */
++ switch (mp_irqs[idx].mpc_irqflag & 3)
++ {
++ case 0: /* conforms, ie. bus-type dependent polarity */
++ {
++ switch (mp_bus_id_to_type[bus])
++ {
++ case MP_BUS_ISA: /* ISA pin */
++ {
++ polarity = default_ISA_polarity(idx);
++ break;
++ }
++ case MP_BUS_EISA: /* EISA pin */
++ {
++ polarity = default_EISA_polarity(idx);
++ break;
++ }
++ case MP_BUS_PCI: /* PCI pin */
++ {
++ polarity = default_PCI_polarity(idx);
++ break;
++ }
++ case MP_BUS_MCA: /* MCA pin */
++ {
++ polarity = default_MCA_polarity(idx);
++ break;
++ }
++ default:
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ polarity = 1;
++ break;
++ }
++ }
++ break;
++ }
++ case 1: /* high active */
++ {
++ polarity = 0;
++ break;
++ }
++ case 2: /* reserved */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ polarity = 1;
++ break;
++ }
++ case 3: /* low active */
++ {
++ polarity = 1;
++ break;
++ }
++ default: /* invalid */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ polarity = 1;
++ break;
++ }
++ }
++ return polarity;
++}
++
++static int MPBIOS_trigger(int idx)
++{
++ int bus = mp_irqs[idx].mpc_srcbus;
++ int trigger;
++
++ /*
++ * Determine IRQ trigger mode (edge or level sensitive):
++ */
++ switch ((mp_irqs[idx].mpc_irqflag>>2) & 3)
++ {
++ case 0: /* conforms, ie. bus-type dependent */
++ {
++ switch (mp_bus_id_to_type[bus])
++ {
++ case MP_BUS_ISA: /* ISA pin */
++ {
++ trigger = default_ISA_trigger(idx);
++ break;
++ }
++ case MP_BUS_EISA: /* EISA pin */
++ {
++ trigger = default_EISA_trigger(idx);
++ break;
++ }
++ case MP_BUS_PCI: /* PCI pin */
++ {
++ trigger = default_PCI_trigger(idx);
++ break;
++ }
++ case MP_BUS_MCA: /* MCA pin */
++ {
++ trigger = default_MCA_trigger(idx);
++ break;
++ }
++ default:
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ trigger = 1;
++ break;
++ }
++ }
++ break;
++ }
++ case 1: /* edge */
++ {
++ trigger = 0;
++ break;
++ }
++ case 2: /* reserved */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ trigger = 1;
++ break;
++ }
++ case 3: /* level */
++ {
++ trigger = 1;
++ break;
++ }
++ default: /* invalid */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ trigger = 0;
++ break;
++ }
++ }
++ return trigger;
++}
++
++static inline int irq_polarity(int idx)
++{
++ return MPBIOS_polarity(idx);
++}
++
++static inline int irq_trigger(int idx)
++{
++ return MPBIOS_trigger(idx);
++}
++
++static int next_irq = 16;
++
++/*
++ * gsi_irq_sharing -- Name overload! "irq" can be either a legacy IRQ
++ * in the range 0-15, a linux IRQ in the range 0-223, or a GSI number
++ * from ACPI, which can reach 800 in large boxen.
++ *
++ * Compact the sparse GSI space into a sequential IRQ series and reuse
++ * vectors if possible.
++ */
++int gsi_irq_sharing(int gsi)
++{
++ int i, tries, vector;
++
++ BUG_ON(gsi >= NR_IRQ_VECTORS);
++
++ if (platform_legacy_irq(gsi))
++ return gsi;
++
++ if (gsi_2_irq[gsi] != 0xFF)
++ return (int)gsi_2_irq[gsi];
++
++ tries = NR_IRQS;
++ try_again:
++ vector = assign_irq_vector(gsi);
++
++ /*
++ * Sharing vectors means sharing IRQs, so scan irq_vectors for previous
++ * use of vector and if found, return that IRQ. However, we never want
++ * to share legacy IRQs, which usually have a different trigger mode
++ * than PCI.
++ */
++ for (i = 0; i < NR_IRQS; i++)
++ if (IO_APIC_VECTOR(i) == vector)
++ break;
++ if (platform_legacy_irq(i)) {
++ if (--tries >= 0) {
++ IO_APIC_VECTOR(i) = 0;
++ goto try_again;
++ }
++ panic("gsi_irq_sharing: didn't find an IRQ using vector 0x%02X for GSI %d", vector, gsi);
++ }
++ if (i < NR_IRQS) {
++ gsi_2_irq[gsi] = i;
++ printk(KERN_INFO "GSI %d sharing vector 0x%02X and IRQ %d\n",
++ gsi, vector, i);
++ return i;
++ }
++
++ i = next_irq++;
++ BUG_ON(i >= NR_IRQS);
++ gsi_2_irq[gsi] = i;
++ IO_APIC_VECTOR(i) = vector;
++ printk(KERN_INFO "GSI %d assigned vector 0x%02X and IRQ %d\n",
++ gsi, vector, i);
++ return i;
++}
++
++static int pin_2_irq(int idx, int apic, int pin)
++{
++ int irq, i;
++ int bus = mp_irqs[idx].mpc_srcbus;
++
++ /*
++ * Debugging check, we are in big trouble if this message pops up!
++ */
++ if (mp_irqs[idx].mpc_dstirq != pin)
++ printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n");
++
++ switch (mp_bus_id_to_type[bus])
++ {
++ case MP_BUS_ISA: /* ISA pin */
++ case MP_BUS_EISA:
++ case MP_BUS_MCA:
++ {
++ irq = mp_irqs[idx].mpc_srcbusirq;
++ break;
++ }
++ case MP_BUS_PCI: /* PCI pin */
++ {
++ /*
++ * PCI IRQs are mapped in order
++ */
++ i = irq = 0;
++ while (i < apic)
++ irq += nr_ioapic_registers[i++];
++ irq += pin;
++ irq = gsi_irq_sharing(irq);
++ break;
++ }
++ default:
++ {
++ printk(KERN_ERR "unknown bus type %d.\n",bus);
++ irq = 0;
++ break;
++ }
++ }
++ BUG_ON(irq >= NR_IRQS);
++
++ /*
++ * PCI IRQ command line redirection. Yes, limits are hardcoded.
++ */
++ if ((pin >= 16) && (pin <= 23)) {
++ if (pirq_entries[pin-16] != -1) {
++ if (!pirq_entries[pin-16]) {
++ apic_printk(APIC_VERBOSE, "disabling PIRQ%d\n", pin-16);
++ } else {
++ irq = pirq_entries[pin-16];
++ apic_printk(APIC_VERBOSE, "using PIRQ%d -> IRQ %d\n",
++ pin-16, irq);
++ }
++ }
++ }
++ BUG_ON(irq >= NR_IRQS);
++ return irq;
++}
++
++static inline int IO_APIC_irq_trigger(int irq)
++{
++ int apic, idx, pin;
++
++ for (apic = 0; apic < nr_ioapics; apic++) {
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
++ idx = find_irq_entry(apic,pin,mp_INT);
++ if ((idx != -1) && (irq == pin_2_irq(idx,apic,pin)))
++ return irq_trigger(idx);
++ }
++ }
++ /*
++ * nonexistent IRQs are edge default
++ */
++ return 0;
++}
++
++/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
++u8 irq_vector[NR_IRQ_VECTORS] __read_mostly;
++
++int assign_irq_vector(int irq)
++{
++ unsigned long flags;
++ int vector;
++ struct physdev_irq irq_op;
++
++ BUG_ON(irq != AUTO_ASSIGN && (unsigned)irq >= NR_IRQ_VECTORS);
++
++ if (irq < PIRQ_BASE || irq - PIRQ_BASE > NR_PIRQS)
++ return -EINVAL;
++
++ spin_lock_irqsave(&vector_lock, flags);
++
++ if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0) {
++ spin_unlock_irqrestore(&vector_lock, flags);
++ return IO_APIC_VECTOR(irq);
++ }
++
++ irq_op.irq = irq;
++ if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op)) {
++ spin_unlock_irqrestore(&vector_lock, flags);
++ return -ENOSPC;
++ }
++
++ vector = irq_op.vector;
++ vector_irq[vector] = irq;
++ if (irq != AUTO_ASSIGN)
++ IO_APIC_VECTOR(irq) = vector;
++
++ spin_unlock_irqrestore(&vector_lock, flags);
++
++ return vector;
++}
++
++extern void (*interrupt[NR_IRQS])(void);
++#ifndef CONFIG_XEN
++static struct hw_interrupt_type ioapic_level_type;
++static struct hw_interrupt_type ioapic_edge_type;
++
++#define IOAPIC_AUTO -1
++#define IOAPIC_EDGE 0
++#define IOAPIC_LEVEL 1
++
++static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
++{
++ unsigned idx;
++
++ idx = use_pci_vector() && !platform_legacy_irq(irq) ? vector : irq;
++
++ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
++ trigger == IOAPIC_LEVEL)
++ irq_desc[idx].chip = &ioapic_level_type;
++ else
++ irq_desc[idx].chip = &ioapic_edge_type;
++ set_intr_gate(vector, interrupt[idx]);
++}
++#else
++#define ioapic_register_intr(irq, vector, trigger) evtchn_register_pirq(irq)
++#endif /* !CONFIG_XEN */
++
++static void __init setup_IO_APIC_irqs(void)
++{
++ struct IO_APIC_route_entry entry;
++ int apic, pin, idx, irq, first_notcon = 1, vector;
++ unsigned long flags;
++
++ apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
++
++ for (apic = 0; apic < nr_ioapics; apic++) {
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
++
++ /*
++ * add it to the IO-APIC irq-routing table:
++ */
++ memset(&entry,0,sizeof(entry));
++
++ entry.delivery_mode = INT_DELIVERY_MODE;
++ entry.dest_mode = INT_DEST_MODE;
++ entry.mask = 0; /* enable IRQ */
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++
++ idx = find_irq_entry(apic,pin,mp_INT);
++ if (idx == -1) {
++ if (first_notcon) {
++ apic_printk(APIC_VERBOSE, KERN_DEBUG " IO-APIC (apicid-pin) %d-%d", mp_ioapics[apic].mpc_apicid, pin);
++ first_notcon = 0;
++ } else
++ apic_printk(APIC_VERBOSE, ", %d-%d", mp_ioapics[apic].mpc_apicid, pin);
++ continue;
++ }
++
++ entry.trigger = irq_trigger(idx);
++ entry.polarity = irq_polarity(idx);
++
++ if (irq_trigger(idx)) {
++ entry.trigger = 1;
++ entry.mask = 1;
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++ }
++
++ irq = pin_2_irq(idx, apic, pin);
++ add_pin_to_irq(irq, apic, pin);
++
++ if (/* !apic && */ !IO_APIC_IRQ(irq))
++ continue;
++
++ if (IO_APIC_IRQ(irq)) {
++ vector = assign_irq_vector(irq);
++ entry.vector = vector;
++
++ ioapic_register_intr(irq, vector, IOAPIC_AUTO);
++ if (!apic && (irq < 16))
++ disable_8259A_irq(irq);
++ }
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1));
++ io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0));
++ set_native_irq_info(irq, TARGET_CPUS);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ }
++ }
++
++ if (!first_notcon)
++ apic_printk(APIC_VERBOSE," not connected.\n");
++}
++
++#ifndef CONFIG_XEN
++/*
++ * Set up the 8259A-master output pin as broadcast to all
++ * CPUs.
++ */
++static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, int vector)
++{
++ struct IO_APIC_route_entry entry;
++ unsigned long flags;
++
++ memset(&entry,0,sizeof(entry));
++
++ disable_8259A_irq(0);
++
++ /* mask LVT0 */
++ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
++
++ /*
++ * We use logical delivery to get the timer IRQ
++ * to the first CPU.
++ */
++ entry.dest_mode = INT_DEST_MODE;
++ entry.mask = 0; /* unmask IRQ now */
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++ entry.delivery_mode = INT_DELIVERY_MODE;
++ entry.polarity = 0;
++ entry.trigger = 0;
++ entry.vector = vector;
++
++ /*
++ * The timer IRQ doesn't have to know that behind the
++ * scene we have a 8259A-master in AEOI mode ...
++ */
++ irq_desc[0].chip = &ioapic_edge_type;
++
++ /*
++ * Add it to the IO-APIC irq-routing table:
++ */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1));
++ io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ enable_8259A_irq(0);
++}
++
++void __init UNEXPECTED_IO_APIC(void)
++{
++}
++
++void __apicdebuginit print_IO_APIC(void)
++{
++ int apic, i;
++ union IO_APIC_reg_00 reg_00;
++ union IO_APIC_reg_01 reg_01;
++ union IO_APIC_reg_02 reg_02;
++ unsigned long flags;
++
++ if (apic_verbosity == APIC_QUIET)
++ return;
++
++ printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
++ for (i = 0; i < nr_ioapics; i++)
++ printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n",
++ mp_ioapics[i].mpc_apicid, nr_ioapic_registers[i]);
++
++ /*
++ * We are a bit conservative about what we expect. We have to
++ * know about every hardware change ASAP.
++ */
++ printk(KERN_INFO "testing the IO APIC.......................\n");
++
++ for (apic = 0; apic < nr_ioapics; apic++) {
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(apic, 0);
++ reg_01.raw = io_apic_read(apic, 1);
++ if (reg_01.bits.version >= 0x10)
++ reg_02.raw = io_apic_read(apic, 2);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ printk("\n");
++ printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mpc_apicid);
++ printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw);
++ printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID);
++ if (reg_00.bits.__reserved_1 || reg_00.bits.__reserved_2)
++ UNEXPECTED_IO_APIC();
++
++ printk(KERN_DEBUG ".... register #01: %08X\n", *(int *)®_01);
++ printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries);
++ if ( (reg_01.bits.entries != 0x0f) && /* older (Neptune) boards */
++ (reg_01.bits.entries != 0x17) && /* typical ISA+PCI boards */
++ (reg_01.bits.entries != 0x1b) && /* Compaq Proliant boards */
++ (reg_01.bits.entries != 0x1f) && /* dual Xeon boards */
++ (reg_01.bits.entries != 0x22) && /* bigger Xeon boards */
++ (reg_01.bits.entries != 0x2E) &&
++ (reg_01.bits.entries != 0x3F) &&
++ (reg_01.bits.entries != 0x03)
++ )
++ UNEXPECTED_IO_APIC();
++
++ printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ);
++ printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version);
++ if ( (reg_01.bits.version != 0x01) && /* 82489DX IO-APICs */
++ (reg_01.bits.version != 0x02) && /* 82801BA IO-APICs (ICH2) */
++ (reg_01.bits.version != 0x10) && /* oldest IO-APICs */
++ (reg_01.bits.version != 0x11) && /* Pentium/Pro IO-APICs */
++ (reg_01.bits.version != 0x13) && /* Xeon IO-APICs */
++ (reg_01.bits.version != 0x20) /* Intel P64H (82806 AA) */
++ )
++ UNEXPECTED_IO_APIC();
++ if (reg_01.bits.__reserved_1 || reg_01.bits.__reserved_2)
++ UNEXPECTED_IO_APIC();
++
++ if (reg_01.bits.version >= 0x10) {
++ printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw);
++ printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration);
++ if (reg_02.bits.__reserved_1 || reg_02.bits.__reserved_2)
++ UNEXPECTED_IO_APIC();
++ }
++
++ printk(KERN_DEBUG ".... IRQ redirection table:\n");
++
++ printk(KERN_DEBUG " NR Log Phy Mask Trig IRR Pol"
++ " Stat Dest Deli Vect: \n");
++
++ for (i = 0; i <= reg_01.bits.entries; i++) {
++ struct IO_APIC_route_entry entry;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ *(((int *)&entry)+0) = io_apic_read(apic, 0x10+i*2);
++ *(((int *)&entry)+1) = io_apic_read(apic, 0x11+i*2);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ printk(KERN_DEBUG " %02x %03X %02X ",
++ i,
++ entry.dest.logical.logical_dest,
++ entry.dest.physical.physical_dest
++ );
++
++ printk("%1d %1d %1d %1d %1d %1d %1d %02X\n",
++ entry.mask,
++ entry.trigger,
++ entry.irr,
++ entry.polarity,
++ entry.delivery_status,
++ entry.dest_mode,
++ entry.delivery_mode,
++ entry.vector
++ );
++ }
++ }
++ if (use_pci_vector())
++ printk(KERN_INFO "Using vector-based indexing\n");
++ printk(KERN_DEBUG "IRQ to pin mappings:\n");
++ for (i = 0; i < NR_IRQS; i++) {
++ struct irq_pin_list *entry = irq_2_pin + i;
++ if (entry->pin < 0)
++ continue;
++ if (use_pci_vector() && !platform_legacy_irq(i))
++ printk(KERN_DEBUG "IRQ%d ", IO_APIC_VECTOR(i));
++ else
++ printk(KERN_DEBUG "IRQ%d ", i);
++ for (;;) {
++ printk("-> %d:%d", entry->apic, entry->pin);
++ if (!entry->next)
++ break;
++ entry = irq_2_pin + entry->next;
++ }
++ printk("\n");
++ }
++
++ printk(KERN_INFO ".................................... done.\n");
++
++ return;
++}
++
++static __apicdebuginit void print_APIC_bitfield (int base)
++{
++ unsigned int v;
++ int i, j;
++
++ if (apic_verbosity == APIC_QUIET)
++ return;
++
++ printk(KERN_DEBUG "0123456789abcdef0123456789abcdef\n" KERN_DEBUG);
++ for (i = 0; i < 8; i++) {
++ v = apic_read(base + i*0x10);
++ for (j = 0; j < 32; j++) {
++ if (v & (1<<j))
++ printk("1");
++ else
++ printk("0");
++ }
++ printk("\n");
++ }
++}
++
++void __apicdebuginit print_local_APIC(void * dummy)
++{
++ unsigned int v, ver, maxlvt;
++
++ if (apic_verbosity == APIC_QUIET)
++ return;
++
++ printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
++ smp_processor_id(), hard_smp_processor_id());
++ v = apic_read(APIC_ID);
++ printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, GET_APIC_ID(v));
++ v = apic_read(APIC_LVR);
++ printk(KERN_INFO "... APIC VERSION: %08x\n", v);
++ ver = GET_APIC_VERSION(v);
++ maxlvt = get_maxlvt();
++
++ v = apic_read(APIC_TASKPRI);
++ printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
++
++ v = apic_read(APIC_ARBPRI);
++ printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
++ v & APIC_ARBPRI_MASK);
++ v = apic_read(APIC_PROCPRI);
++ printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
++
++ v = apic_read(APIC_EOI);
++ printk(KERN_DEBUG "... APIC EOI: %08x\n", v);
++ v = apic_read(APIC_RRR);
++ printk(KERN_DEBUG "... APIC RRR: %08x\n", v);
++ v = apic_read(APIC_LDR);
++ printk(KERN_DEBUG "... APIC LDR: %08x\n", v);
++ v = apic_read(APIC_DFR);
++ printk(KERN_DEBUG "... APIC DFR: %08x\n", v);
++ v = apic_read(APIC_SPIV);
++ printk(KERN_DEBUG "... APIC SPIV: %08x\n", v);
++
++ printk(KERN_DEBUG "... APIC ISR field:\n");
++ print_APIC_bitfield(APIC_ISR);
++ printk(KERN_DEBUG "... APIC TMR field:\n");
++ print_APIC_bitfield(APIC_TMR);
++ printk(KERN_DEBUG "... APIC IRR field:\n");
++ print_APIC_bitfield(APIC_IRR);
++
++ v = apic_read(APIC_ESR);
++ printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
++
++ v = apic_read(APIC_ICR);
++ printk(KERN_DEBUG "... APIC ICR: %08x\n", v);
++ v = apic_read(APIC_ICR2);
++ printk(KERN_DEBUG "... APIC ICR2: %08x\n", v);
++
++ v = apic_read(APIC_LVTT);
++ printk(KERN_DEBUG "... APIC LVTT: %08x\n", v);
++
++ if (maxlvt > 3) { /* PC is LVT#4. */
++ v = apic_read(APIC_LVTPC);
++ printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v);
++ }
++ v = apic_read(APIC_LVT0);
++ printk(KERN_DEBUG "... APIC LVT0: %08x\n", v);
++ v = apic_read(APIC_LVT1);
++ printk(KERN_DEBUG "... APIC LVT1: %08x\n", v);
++
++ if (maxlvt > 2) { /* ERR is LVT#3. */
++ v = apic_read(APIC_LVTERR);
++ printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v);
++ }
++
++ v = apic_read(APIC_TMICT);
++ printk(KERN_DEBUG "... APIC TMICT: %08x\n", v);
++ v = apic_read(APIC_TMCCT);
++ printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v);
++ v = apic_read(APIC_TDCR);
++ printk(KERN_DEBUG "... APIC TDCR: %08x\n", v);
++ printk("\n");
++}
++
++void print_all_local_APICs (void)
++{
++ on_each_cpu(print_local_APIC, NULL, 1, 1);
++}
++
++void __apicdebuginit print_PIC(void)
++{
++ unsigned int v;
++ unsigned long flags;
++
++ if (apic_verbosity == APIC_QUIET)
++ return;
++
++ printk(KERN_DEBUG "\nprinting PIC contents\n");
++
++ spin_lock_irqsave(&i8259A_lock, flags);
++
++ v = inb(0xa1) << 8 | inb(0x21);
++ printk(KERN_DEBUG "... PIC IMR: %04x\n", v);
++
++ v = inb(0xa0) << 8 | inb(0x20);
++ printk(KERN_DEBUG "... PIC IRR: %04x\n", v);
++
++ outb(0x0b,0xa0);
++ outb(0x0b,0x20);
++ v = inb(0xa0) << 8 | inb(0x20);
++ outb(0x0a,0xa0);
++ outb(0x0a,0x20);
++
++ spin_unlock_irqrestore(&i8259A_lock, flags);
++
++ printk(KERN_DEBUG "... PIC ISR: %04x\n", v);
++
++ v = inb(0x4d1) << 8 | inb(0x4d0);
++ printk(KERN_DEBUG "... PIC ELCR: %04x\n", v);
++}
++#endif /* !CONFIG_XEN */
++
++static void __init enable_IO_APIC(void)
++{
++ union IO_APIC_reg_01 reg_01;
++#ifndef CONFIG_XEN
++ int i8259_apic, i8259_pin;
++#endif
++ int i, apic;
++ unsigned long flags;
++
++ for (i = 0; i < PIN_MAP_SIZE; i++) {
++ irq_2_pin[i].pin = -1;
++ irq_2_pin[i].next = 0;
++ }
++ if (!pirqs_enabled)
++ for (i = 0; i < MAX_PIRQS; i++)
++ pirq_entries[i] = -1;
++
++ /*
++ * The number of IO-APIC IRQ registers (== #pins):
++ */
++ for (apic = 0; apic < nr_ioapics; apic++) {
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_01.raw = io_apic_read(apic, 1);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ nr_ioapic_registers[apic] = reg_01.bits.entries+1;
++ }
++#ifndef CONFIG_XEN
++ for(apic = 0; apic < nr_ioapics; apic++) {
++ int pin;
++ /* See if any of the pins is in ExtINT mode */
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
++ struct IO_APIC_route_entry entry;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ *(((int *)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
++ *(((int *)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++
++ /* If the interrupt line is enabled and in ExtInt mode
++ * I have found the pin where the i8259 is connected.
++ */
++ if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) {
++ ioapic_i8259.apic = apic;
++ ioapic_i8259.pin = pin;
++ goto found_i8259;
++ }
++ }
++ }
++ found_i8259:
++ /* Look to see what if the MP table has reported the ExtINT */
++ i8259_pin = find_isa_irq_pin(0, mp_ExtINT);
++ i8259_apic = find_isa_irq_apic(0, mp_ExtINT);
++ /* Trust the MP table if nothing is setup in the hardware */
++ if ((ioapic_i8259.pin == -1) && (i8259_pin >= 0)) {
++ printk(KERN_WARNING "ExtINT not setup in hardware but reported by MP table\n");
++ ioapic_i8259.pin = i8259_pin;
++ ioapic_i8259.apic = i8259_apic;
++ }
++ /* Complain if the MP table and the hardware disagree */
++ if (((ioapic_i8259.apic != i8259_apic) || (ioapic_i8259.pin != i8259_pin)) &&
++ (i8259_pin >= 0) && (ioapic_i8259.pin >= 0))
++ {
++ printk(KERN_WARNING "ExtINT in hardware and MP table differ\n");
++ }
++#endif
++
++ /*
++ * Do not trust the IO-APIC being empty at bootup
++ */
++ clear_IO_APIC();
++}
++
++/*
++ * Not an __init, needed by the reboot code
++ */
++void disable_IO_APIC(void)
++{
++ /*
++ * Clear the IO-APIC before rebooting:
++ */
++ clear_IO_APIC();
++
++#ifndef CONFIG_XEN
++ /*
++ * If the i8259 is routed through an IOAPIC
++ * Put that IOAPIC in virtual wire mode
++ * so legacy interrupts can be delivered.
++ */
++ if (ioapic_i8259.pin != -1) {
++ struct IO_APIC_route_entry entry;
++ unsigned long flags;
++
++ memset(&entry, 0, sizeof(entry));
++ entry.mask = 0; /* Enabled */
++ entry.trigger = 0; /* Edge */
++ entry.irr = 0;
++ entry.polarity = 0; /* High */
++ entry.delivery_status = 0;
++ entry.dest_mode = 0; /* Physical */
++ entry.delivery_mode = dest_ExtINT; /* ExtInt */
++ entry.vector = 0;
++ entry.dest.physical.physical_dest =
++ GET_APIC_ID(apic_read(APIC_ID));
++
++ /*
++ * Add it to the IO-APIC irq-routing table:
++ */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(ioapic_i8259.apic, 0x11+2*ioapic_i8259.pin,
++ *(((int *)&entry)+1));
++ io_apic_write(ioapic_i8259.apic, 0x10+2*ioapic_i8259.pin,
++ *(((int *)&entry)+0));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ }
++
++ disconnect_bsp_APIC(ioapic_i8259.pin != -1);
++#endif
++}
++
++/*
++ * function to set the IO-APIC physical IDs based on the
++ * values stored in the MPC table.
++ *
++ * by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999
++ */
++
++#ifndef CONFIG_XEN
++static void __init setup_ioapic_ids_from_mpc (void)
++{
++ union IO_APIC_reg_00 reg_00;
++ int apic;
++ int i;
++ unsigned char old_id;
++ unsigned long flags;
++
++ /*
++ * Set the IOAPIC ID to the value stored in the MPC table.
++ */
++ for (apic = 0; apic < nr_ioapics; apic++) {
++
++ /* Read the register 0 value */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(apic, 0);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ old_id = mp_ioapics[apic].mpc_apicid;
++
++
++ printk(KERN_INFO "Using IO-APIC %d\n", mp_ioapics[apic].mpc_apicid);
++
++
++ /*
++ * We need to adjust the IRQ routing table
++ * if the ID changed.
++ */
++ if (old_id != mp_ioapics[apic].mpc_apicid)
++ for (i = 0; i < mp_irq_entries; i++)
++ if (mp_irqs[i].mpc_dstapic == old_id)
++ mp_irqs[i].mpc_dstapic
++ = mp_ioapics[apic].mpc_apicid;
++
++ /*
++ * Read the right value from the MPC table and
++ * write it into the ID register.
++ */
++ apic_printk(APIC_VERBOSE,KERN_INFO "...changing IO-APIC physical APIC ID to %d ...",
++ mp_ioapics[apic].mpc_apicid);
++
++ reg_00.bits.ID = mp_ioapics[apic].mpc_apicid;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0, reg_00.raw);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ /*
++ * Sanity check
++ */
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(apic, 0);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ if (reg_00.bits.ID != mp_ioapics[apic].mpc_apicid)
++ printk("could not set ID!\n");
++ else
++ apic_printk(APIC_VERBOSE," ok.\n");
++ }
++}
++#else
++static void __init setup_ioapic_ids_from_mpc(void) { }
++#endif
++
++/*
++ * There is a nasty bug in some older SMP boards, their mptable lies
++ * about the timer IRQ. We do the following to work around the situation:
++ *
++ * - timer IRQ defaults to IO-APIC IRQ
++ * - if this function detects that timer IRQs are defunct, then we fall
++ * back to ISA timer IRQs
++ */
++#ifndef CONFIG_XEN
++static int __init timer_irq_works(void)
++{
++ unsigned long t1 = jiffies;
++
++ local_irq_enable();
++ /* Let ten ticks pass... */
++ mdelay((10 * 1000) / HZ);
++
++ /*
++ * Expect a few ticks at least, to be sure some possible
++ * glue logic does not lock up after one or two first
++ * ticks in a non-ExtINT mode. Also the local APIC
++ * might have cached one ExtINT interrupt. Finally, at
++ * least one tick may be lost due to delays.
++ */
++
++ /* jiffies wrap? */
++ if (jiffies - t1 > 4)
++ return 1;
++ return 0;
++}
++
++/*
++ * In the SMP+IOAPIC case it might happen that there are an unspecified
++ * number of pending IRQ events unhandled. These cases are very rare,
++ * so we 'resend' these IRQs via IPIs, to the same CPU. It's much
++ * better to do it this way as thus we do not have to be aware of
++ * 'pending' interrupts in the IRQ path, except at this point.
++ */
++/*
++ * Edge triggered needs to resend any interrupt
++ * that was delayed but this is now handled in the device
++ * independent code.
++ */
++
++/*
++ * Starting up a edge-triggered IO-APIC interrupt is
++ * nasty - we need to make sure that we get the edge.
++ * If it is already asserted for some reason, we need
++ * return 1 to indicate that is was pending.
++ *
++ * This is not complete - we should be able to fake
++ * an edge even if it isn't on the 8259A...
++ */
++
++static unsigned int startup_edge_ioapic_irq(unsigned int irq)
++{
++ int was_pending = 0;
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ if (irq < 16) {
++ disable_8259A_irq(irq);
++ if (i8259A_irq_pending(irq))
++ was_pending = 1;
++ }
++ __unmask_IO_APIC_irq(irq);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return was_pending;
++}
++
++/*
++ * Once we have recorded IRQ_PENDING already, we can mask the
++ * interrupt for real. This prevents IRQ storms from unhandled
++ * devices.
++ */
++static void ack_edge_ioapic_irq(unsigned int irq)
++{
++ move_irq(irq);
++ if ((irq_desc[irq].status & (IRQ_PENDING | IRQ_DISABLED))
++ == (IRQ_PENDING | IRQ_DISABLED))
++ mask_IO_APIC_irq(irq);
++ ack_APIC_irq();
++}
++
++/*
++ * Level triggered interrupts can just be masked,
++ * and shutting down and starting up the interrupt
++ * is the same as enabling and disabling them -- except
++ * with a startup need to return a "was pending" value.
++ *
++ * Level triggered interrupts are special because we
++ * do not touch any IO-APIC register while handling
++ * them. We ack the APIC in the end-IRQ handler, not
++ * in the start-IRQ-handler. Protection against reentrance
++ * from the same interrupt is still provided, both by the
++ * generic IRQ layer and by the fact that an unacked local
++ * APIC does not accept IRQs.
++ */
++static unsigned int startup_level_ioapic_irq (unsigned int irq)
++{
++ unmask_IO_APIC_irq(irq);
++
++ return 0; /* don't check for pending */
++}
++
++static void end_level_ioapic_irq (unsigned int irq)
++{
++ move_irq(irq);
++ ack_APIC_irq();
++}
++
++#ifdef CONFIG_PCI_MSI
++static unsigned int startup_edge_ioapic_vector(unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ return startup_edge_ioapic_irq(irq);
++}
++
++static void ack_edge_ioapic_vector(unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ move_native_irq(vector);
++ ack_edge_ioapic_irq(irq);
++}
++
++static unsigned int startup_level_ioapic_vector (unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ return startup_level_ioapic_irq (irq);
++}
++
++static void end_level_ioapic_vector (unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ move_native_irq(vector);
++ end_level_ioapic_irq(irq);
++}
++
++static void mask_IO_APIC_vector (unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ mask_IO_APIC_irq(irq);
++}
++
++static void unmask_IO_APIC_vector (unsigned int vector)
++{
++ int irq = vector_to_irq(vector);
++
++ unmask_IO_APIC_irq(irq);
++}
++
++#ifdef CONFIG_SMP
++static void set_ioapic_affinity_vector (unsigned int vector,
++ cpumask_t cpu_mask)
++{
++ int irq = vector_to_irq(vector);
++
++ set_native_irq_info(vector, cpu_mask);
++ set_ioapic_affinity_irq(irq, cpu_mask);
++}
++#endif // CONFIG_SMP
++#endif // CONFIG_PCI_MSI
++
++static int ioapic_retrigger(unsigned int irq)
++{
++ send_IPI_self(IO_APIC_VECTOR(irq));
++
++ return 1;
++}
++
++/*
++ * Level and edge triggered IO-APIC interrupts need different handling,
++ * so we use two separate IRQ descriptors. Edge triggered IRQs can be
++ * handled with the level-triggered descriptor, but that one has slightly
++ * more overhead. Level-triggered interrupts cannot be handled with the
++ * edge-triggered handler, without risking IRQ storms and other ugly
++ * races.
++ */
++
++static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
++ .typename = "IO-APIC-edge",
++ .startup = startup_edge_ioapic,
++ .shutdown = shutdown_edge_ioapic,
++ .enable = enable_edge_ioapic,
++ .disable = disable_edge_ioapic,
++ .ack = ack_edge_ioapic,
++ .end = end_edge_ioapic,
++#ifdef CONFIG_SMP
++ .set_affinity = set_ioapic_affinity,
++#endif
++ .retrigger = ioapic_retrigger,
++};
++
++static struct hw_interrupt_type ioapic_level_type __read_mostly = {
++ .typename = "IO-APIC-level",
++ .startup = startup_level_ioapic,
++ .shutdown = shutdown_level_ioapic,
++ .enable = enable_level_ioapic,
++ .disable = disable_level_ioapic,
++ .ack = mask_and_ack_level_ioapic,
++ .end = end_level_ioapic,
++#ifdef CONFIG_SMP
++ .set_affinity = set_ioapic_affinity,
++#endif
++ .retrigger = ioapic_retrigger,
++};
++#endif /* !CONFIG_XEN */
++
++static inline void init_IO_APIC_traps(void)
++{
++ int irq;
++
++ /*
++ * NOTE! The local APIC isn't very good at handling
++ * multiple interrupts at the same interrupt level.
++ * As the interrupt level is determined by taking the
++ * vector number and shifting that right by 4, we
++ * want to spread these out a bit so that they don't
++ * all fall in the same interrupt level.
++ *
++ * Also, we've got to be careful not to trash gate
++ * 0x80, because int 0x80 is hm, kind of importantish. ;)
++ */
++ for (irq = 0; irq < NR_IRQS ; irq++) {
++ int tmp = irq;
++ if (use_pci_vector()) {
++ if (!platform_legacy_irq(tmp))
++ if ((tmp = vector_to_irq(tmp)) == -1)
++ continue;
++ }
++ if (IO_APIC_IRQ(tmp) && !IO_APIC_VECTOR(tmp)) {
++ /*
++ * Hmm.. We don't have an entry for this,
++ * so default to an old-fashioned 8259
++ * interrupt if we can..
++ */
++ if (irq < 16)
++ make_8259A_irq(irq);
++#ifndef CONFIG_XEN
++ else
++ /* Strange. Oh, well.. */
++ irq_desc[irq].chip = &no_irq_type;
++#endif
++ }
++ }
++}
++
++#ifndef CONFIG_XEN
++static void enable_lapic_irq (unsigned int irq)
++{
++ unsigned long v;
++
++ v = apic_read(APIC_LVT0);
++ apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
++}
++
++static void disable_lapic_irq (unsigned int irq)
++{
++ unsigned long v;
++
++ v = apic_read(APIC_LVT0);
++ apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
++}
++
++static void ack_lapic_irq (unsigned int irq)
++{
++ ack_APIC_irq();
++}
++
++static void end_lapic_irq (unsigned int i) { /* nothing */ }
++
++static struct hw_interrupt_type lapic_irq_type __read_mostly = {
++ .typename = "local-APIC-edge",
++ .startup = NULL, /* startup_irq() not used for IRQ0 */
++ .shutdown = NULL, /* shutdown_irq() not used for IRQ0 */
++ .enable = enable_lapic_irq,
++ .disable = disable_lapic_irq,
++ .ack = ack_lapic_irq,
++ .end = end_lapic_irq,
++};
++
++static void setup_nmi (void)
++{
++ /*
++ * Dirty trick to enable the NMI watchdog ...
++ * We put the 8259A master into AEOI mode and
++ * unmask on all local APICs LVT0 as NMI.
++ *
++ * The idea to use the 8259A in AEOI mode ('8259A Virtual Wire')
++ * is from Maciej W. Rozycki - so we do not have to EOI from
++ * the NMI handler or the timer interrupt.
++ */
++ printk(KERN_INFO "activating NMI Watchdog ...");
++
++ enable_NMI_through_LVT0(NULL);
++
++ printk(" done.\n");
++}
++
++/*
++ * This looks a bit hackish but it's about the only one way of sending
++ * a few INTA cycles to 8259As and any associated glue logic. ICR does
++ * not support the ExtINT mode, unfortunately. We need to send these
++ * cycles as some i82489DX-based boards have glue logic that keeps the
++ * 8259A interrupt line asserted until INTA. --macro
++ */
++static inline void unlock_ExtINT_logic(void)
++{
++ int apic, pin, i;
++ struct IO_APIC_route_entry entry0, entry1;
++ unsigned char save_control, save_freq_select;
++ unsigned long flags;
++
++ pin = find_isa_irq_pin(8, mp_INT);
++ apic = find_isa_irq_apic(8, mp_INT);
++ if (pin == -1)
++ return;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ *(((int *)&entry0) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
++ *(((int *)&entry0) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ clear_IO_APIC_pin(apic, pin);
++
++ memset(&entry1, 0, sizeof(entry1));
++
++ entry1.dest_mode = 0; /* physical delivery */
++ entry1.mask = 0; /* unmask IRQ now */
++ entry1.dest.physical.physical_dest = hard_smp_processor_id();
++ entry1.delivery_mode = dest_ExtINT;
++ entry1.polarity = entry0.polarity;
++ entry1.trigger = 0;
++ entry1.vector = 0;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry1) + 1));
++ io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry1) + 0));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ save_control = CMOS_READ(RTC_CONTROL);
++ save_freq_select = CMOS_READ(RTC_FREQ_SELECT);
++ CMOS_WRITE((save_freq_select & ~RTC_RATE_SELECT) | 0x6,
++ RTC_FREQ_SELECT);
++ CMOS_WRITE(save_control | RTC_PIE, RTC_CONTROL);
++
++ i = 100;
++ while (i-- > 0) {
++ mdelay(10);
++ if ((CMOS_READ(RTC_INTR_FLAGS) & RTC_PF) == RTC_PF)
++ i -= 10;
++ }
++
++ CMOS_WRITE(save_control, RTC_CONTROL);
++ CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
++ clear_IO_APIC_pin(apic, pin);
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry0) + 1));
++ io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry0) + 0));
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++int timer_uses_ioapic_pin_0;
++
++/*
++ * This code may look a bit paranoid, but it's supposed to cooperate with
++ * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ
++ * is so screwy. Thanks to Brian Perkins for testing/hacking this beast
++ * fanatically on his truly buggy board.
++ *
++ * FIXME: really need to revamp this for modern platforms only.
++ */
++static inline void check_timer(void)
++{
++ int apic1, pin1, apic2, pin2;
++ int vector;
++
++ /*
++ * get/set the timer IRQ vector:
++ */
++ disable_8259A_irq(0);
++ vector = assign_irq_vector(0);
++ set_intr_gate(vector, interrupt[0]);
++
++ /*
++ * Subtle, code in do_timer_interrupt() expects an AEOI
++ * mode for the 8259A whenever interrupts are routed
++ * through I/O APICs. Also IRQ0 has to be enabled in
++ * the 8259A which implies the virtual wire has to be
++ * disabled in the local APIC.
++ */
++ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
++ init_8259A(1);
++ if (timer_over_8254 > 0)
++ enable_8259A_irq(0);
++
++ pin1 = find_isa_irq_pin(0, mp_INT);
++ apic1 = find_isa_irq_apic(0, mp_INT);
++ pin2 = ioapic_i8259.pin;
++ apic2 = ioapic_i8259.apic;
++
++ if (pin1 == 0)
++ timer_uses_ioapic_pin_0 = 1;
++
++ apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
++ vector, apic1, pin1, apic2, pin2);
++
++ if (pin1 != -1) {
++ /*
++ * Ok, does IRQ0 through the IOAPIC work?
++ */
++ unmask_IO_APIC_irq(0);
++ if (!no_timer_check && timer_irq_works()) {
++ nmi_watchdog_default();
++ if (nmi_watchdog == NMI_IO_APIC) {
++ disable_8259A_irq(0);
++ setup_nmi();
++ enable_8259A_irq(0);
++ }
++ if (disable_timer_pin_1 > 0)
++ clear_IO_APIC_pin(0, pin1);
++ return;
++ }
++ clear_IO_APIC_pin(apic1, pin1);
++ apic_printk(APIC_QUIET,KERN_ERR "..MP-BIOS bug: 8254 timer not "
++ "connected to IO-APIC\n");
++ }
++
++ apic_printk(APIC_VERBOSE,KERN_INFO "...trying to set up timer (IRQ0) "
++ "through the 8259A ... ");
++ if (pin2 != -1) {
++ apic_printk(APIC_VERBOSE,"\n..... (found apic %d pin %d) ...",
++ apic2, pin2);
++ /*
++ * legacy devices should be connected to IO APIC #0
++ */
++ setup_ExtINT_IRQ0_pin(apic2, pin2, vector);
++ if (timer_irq_works()) {
++ apic_printk(APIC_VERBOSE," works.\n");
++ nmi_watchdog_default();
++ if (nmi_watchdog == NMI_IO_APIC) {
++ setup_nmi();
++ }
++ return;
++ }
++ /*
++ * Cleanup, just in case ...
++ */
++ clear_IO_APIC_pin(apic2, pin2);
++ }
++ apic_printk(APIC_VERBOSE," failed.\n");
++
++ if (nmi_watchdog == NMI_IO_APIC) {
++ printk(KERN_WARNING "timer doesn't work through the IO-APIC - disabling NMI Watchdog!\n");
++ nmi_watchdog = 0;
++ }
++
++ apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as Virtual Wire IRQ...");
++
++ disable_8259A_irq(0);
++ irq_desc[0].chip = &lapic_irq_type;
++ apic_write(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
++ enable_8259A_irq(0);
++
++ if (timer_irq_works()) {
++ apic_printk(APIC_VERBOSE," works.\n");
++ return;
++ }
++ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
++ apic_printk(APIC_VERBOSE," failed.\n");
++
++ apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as ExtINT IRQ...");
++
++ init_8259A(0);
++ make_8259A_irq(0);
++ apic_write(APIC_LVT0, APIC_DM_EXTINT);
++
++ unlock_ExtINT_logic();
++
++ if (timer_irq_works()) {
++ apic_printk(APIC_VERBOSE," works.\n");
++ return;
++ }
++ apic_printk(APIC_VERBOSE," failed :(.\n");
++ panic("IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter\n");
++}
++#else
++#define check_timer() ((void)0)
++int timer_uses_ioapic_pin_0 = 0;
++#endif /* !CONFIG_XEN */
++
++static int __init notimercheck(char *s)
++{
++ no_timer_check = 1;
++ return 1;
++}
++__setup("no_timer_check", notimercheck);
++
++/*
++ *
++ * IRQ's that are handled by the PIC in the MPS IOAPIC case.
++ * - IRQ2 is the cascade IRQ, and cannot be a io-apic IRQ.
++ * Linux doesn't really care, as it's not actually used
++ * for any interrupt handling anyway.
++ */
++#define PIC_IRQS (1<<2)
++
++void __init setup_IO_APIC(void)
++{
++ enable_IO_APIC();
++
++ if (acpi_ioapic)
++ io_apic_irqs = ~0; /* all IRQs go through IOAPIC */
++ else
++ io_apic_irqs = ~PIC_IRQS;
++
++ apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
++
++ /*
++ * Set up the IO-APIC IRQ routing table.
++ */
++ if (!acpi_ioapic)
++ setup_ioapic_ids_from_mpc();
++#ifndef CONFIG_XEN
++ sync_Arb_IDs();
++#endif /* !CONFIG_XEN */
++ setup_IO_APIC_irqs();
++ init_IO_APIC_traps();
++ check_timer();
++ if (!acpi_ioapic)
++ print_IO_APIC();
++}
++
++struct sysfs_ioapic_data {
++ struct sys_device dev;
++ struct IO_APIC_route_entry entry[0];
++};
++static struct sysfs_ioapic_data * mp_ioapic_data[MAX_IO_APICS];
++
++static int ioapic_suspend(struct sys_device *dev, pm_message_t state)
++{
++ struct IO_APIC_route_entry *entry;
++ struct sysfs_ioapic_data *data;
++ unsigned long flags;
++ int i;
++
++ data = container_of(dev, struct sysfs_ioapic_data, dev);
++ entry = data->entry;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) {
++ *(((int *)entry) + 1) = io_apic_read(dev->id, 0x11 + 2 * i);
++ *(((int *)entry) + 0) = io_apic_read(dev->id, 0x10 + 2 * i);
++ }
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return 0;
++}
++
++static int ioapic_resume(struct sys_device *dev)
++{
++ struct IO_APIC_route_entry *entry;
++ struct sysfs_ioapic_data *data;
++ unsigned long flags;
++ union IO_APIC_reg_00 reg_00;
++ int i;
++
++ data = container_of(dev, struct sysfs_ioapic_data, dev);
++ entry = data->entry;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_00.raw = io_apic_read(dev->id, 0);
++ if (reg_00.bits.ID != mp_ioapics[dev->id].mpc_apicid) {
++ reg_00.bits.ID = mp_ioapics[dev->id].mpc_apicid;
++ io_apic_write(dev->id, 0, reg_00.raw);
++ }
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) {
++ io_apic_write(dev->id, 0x11+2*i, *(((int *)entry)+1));
++ io_apic_write(dev->id, 0x10+2*i, *(((int *)entry)+0));
++ }
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return 0;
++}
++
++static struct sysdev_class ioapic_sysdev_class = {
++ set_kset_name("ioapic"),
++#ifndef CONFIG_XEN
++ .suspend = ioapic_suspend,
++ .resume = ioapic_resume,
++#endif
++};
++
++static int __init ioapic_init_sysfs(void)
++{
++ struct sys_device * dev;
++ int i, size, error = 0;
++
++ error = sysdev_class_register(&ioapic_sysdev_class);
++ if (error)
++ return error;
++
++ for (i = 0; i < nr_ioapics; i++ ) {
++ size = sizeof(struct sys_device) + nr_ioapic_registers[i]
++ * sizeof(struct IO_APIC_route_entry);
++ mp_ioapic_data[i] = kmalloc(size, GFP_KERNEL);
++ if (!mp_ioapic_data[i]) {
++ printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i);
++ continue;
++ }
++ memset(mp_ioapic_data[i], 0, size);
++ dev = &mp_ioapic_data[i]->dev;
++ dev->id = i;
++ dev->cls = &ioapic_sysdev_class;
++ error = sysdev_register(dev);
++ if (error) {
++ kfree(mp_ioapic_data[i]);
++ mp_ioapic_data[i] = NULL;
++ printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i);
++ continue;
++ }
++ }
++
++ return 0;
++}
++
++device_initcall(ioapic_init_sysfs);
++
++/* --------------------------------------------------------------------------
++ ACPI-based IOAPIC Configuration
++ -------------------------------------------------------------------------- */
++
++#ifdef CONFIG_ACPI
++
++#define IO_APIC_MAX_ID 0xFE
++
++int __init io_apic_get_version (int ioapic)
++{
++ union IO_APIC_reg_01 reg_01;
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_01.raw = io_apic_read(ioapic, 1);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return reg_01.bits.version;
++}
++
++
++int __init io_apic_get_redir_entries (int ioapic)
++{
++ union IO_APIC_reg_01 reg_01;
++ unsigned long flags;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ reg_01.raw = io_apic_read(ioapic, 1);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return reg_01.bits.entries;
++}
++
++
++int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low)
++{
++ struct IO_APIC_route_entry entry;
++ unsigned long flags;
++
++ if (!IO_APIC_IRQ(irq)) {
++ apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
++ ioapic);
++ return -EINVAL;
++ }
++
++ /*
++ * Generate a PCI IRQ routing entry and program the IOAPIC accordingly.
++ * Note that we mask (disable) IRQs now -- these get enabled when the
++ * corresponding device driver registers for this IRQ.
++ */
++
++ memset(&entry,0,sizeof(entry));
++
++ entry.delivery_mode = INT_DELIVERY_MODE;
++ entry.dest_mode = INT_DEST_MODE;
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++ entry.trigger = edge_level;
++ entry.polarity = active_high_low;
++ entry.mask = 1; /* Disabled (masked) */
++
++ irq = gsi_irq_sharing(irq);
++ /*
++ * IRQs < 16 are already in the irq_2_pin[] map
++ */
++ if (irq >= 16)
++ add_pin_to_irq(irq, ioapic, pin);
++
++ entry.vector = assign_irq_vector(irq);
++
++ apic_printk(APIC_VERBOSE,KERN_DEBUG "IOAPIC[%d]: Set PCI routing entry (%d-%d -> 0x%x -> "
++ "IRQ %d Mode:%i Active:%i)\n", ioapic,
++ mp_ioapics[ioapic].mpc_apicid, pin, entry.vector, irq,
++ edge_level, active_high_low);
++
++ ioapic_register_intr(irq, entry.vector, edge_level);
++
++ if (!ioapic && (irq < 16))
++ disable_8259A_irq(irq);
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(ioapic, 0x11+2*pin, *(((int *)&entry)+1));
++ io_apic_write(ioapic, 0x10+2*pin, *(((int *)&entry)+0));
++ set_native_irq_info(use_pci_vector() ? entry.vector : irq, TARGET_CPUS);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++ return 0;
++}
++
++#endif /* CONFIG_ACPI */
++
++
++#ifndef CONFIG_XEN
++/*
++ * This function currently is only a helper for the i386 smp boot process where
++ * we need to reprogram the ioredtbls to cater for the cpus which have come online
++ * so mask in all cases should simply be TARGET_CPUS
++ */
++#ifdef CONFIG_SMP
++void __init setup_ioapic_dest(void)
++{
++ int pin, ioapic, irq, irq_entry;
++
++ if (skip_ioapic_setup == 1)
++ return;
++
++ for (ioapic = 0; ioapic < nr_ioapics; ioapic++) {
++ for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) {
++ irq_entry = find_irq_entry(ioapic, pin, mp_INT);
++ if (irq_entry == -1)
++ continue;
++ irq = pin_2_irq(irq_entry, ioapic, pin);
++ set_ioapic_affinity_irq(irq, TARGET_CPUS);
++ }
++
++ }
++}
++#endif
++#endif /* !CONFIG_XEN */
+Index: head-2008-11-25/arch/x86/kernel/ioport_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/ioport_64-xen.c 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,100 @@
++/*
++ * linux/arch/x86_64/kernel/ioport.c
++ *
++ * This contains the io-permission bitmap code - written by obz, with changes
++ * by Linus.
++ */
++
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/capability.h>
++#include <linux/errno.h>
++#include <linux/types.h>
++#include <linux/ioport.h>
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/smp_lock.h>
++#include <linux/stddef.h>
++#include <linux/slab.h>
++#include <linux/thread_info.h>
++#include <xen/interface/physdev.h>
++
++/* Set EXTENT bits starting at BASE in BITMAP to value TURN_ON. */
++static void set_bitmap(unsigned long *bitmap, unsigned int base, unsigned int extent, int new_value)
++{
++ int i;
++
++ if (new_value)
++ for (i = base; i < base + extent; i++)
++ __set_bit(i, bitmap);
++ else
++ for (i = base; i < base + extent; i++)
++ clear_bit(i, bitmap);
++}
++
++/*
++ * this changes the io permissions bitmap in the current task.
++ */
++asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
++{
++ struct thread_struct * t = ¤t->thread;
++ unsigned long *bitmap;
++ struct physdev_set_iobitmap set_iobitmap;
++
++ if ((from + num <= from) || (from + num > IO_BITMAP_BITS))
++ return -EINVAL;
++ if (turn_on && !capable(CAP_SYS_RAWIO))
++ return -EPERM;
++
++ /*
++ * If it's the first ioperm() call in this thread's lifetime, set the
++ * IO bitmap up. ioperm() is much less timing critical than clone(),
++ * this is why we delay this operation until now:
++ */
++ if (!t->io_bitmap_ptr) {
++ bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
++ if (!bitmap)
++ return -ENOMEM;
++
++ memset(bitmap, 0xff, IO_BITMAP_BYTES);
++ t->io_bitmap_ptr = bitmap;
++
++ set_xen_guest_handle(set_iobitmap.bitmap, (char *)bitmap);
++ set_iobitmap.nr_ports = IO_BITMAP_BITS;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap,
++ &set_iobitmap));
++ }
++
++ set_bitmap(t->io_bitmap_ptr, from, num, !turn_on);
++
++ return 0;
++}
++
++/*
++ * sys_iopl has to be used when you want to access the IO ports
++ * beyond the 0x3ff range: to get the full 65536 ports bitmapped
++ * you'd need 8kB of bitmaps/process, which is a bit excessive.
++ *
++ */
++
++asmlinkage long sys_iopl(unsigned int new_iopl, struct pt_regs *regs)
++{
++ unsigned int old_iopl = current->thread.iopl;
++ struct physdev_set_iopl set_iopl;
++
++ if (new_iopl > 3)
++ return -EINVAL;
++
++ /* Need "raw I/O" privileges for direct port access. */
++ if ((new_iopl > old_iopl) && !capable(CAP_SYS_RAWIO))
++ return -EPERM;
++
++ /* Change our version of the privilege levels. */
++ current->thread.iopl = new_iopl;
++
++ /* Force the change at ring 0. */
++ set_iopl.iopl = (new_iopl == 0) ? 1 : new_iopl;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
++
++ return 0;
++}
+Index: head-2008-11-25/arch/x86/kernel/irq_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/irq_64-xen.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,197 @@
++/*
++ * linux/arch/x86_64/kernel/irq.c
++ *
++ * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
++ *
++ * This file contains the lowest level x86_64-specific interrupt
++ * entry and irq statistics code. All the remaining irq logic is
++ * done by the generic kernel/irq/ code and in the
++ * x86_64-specific irq controller code. (e.g. i8259.c and
++ * io_apic.c.)
++ */
++
++#include <linux/kernel_stat.h>
++#include <linux/interrupt.h>
++#include <linux/seq_file.h>
++#include <linux/module.h>
++#include <linux/delay.h>
++#include <asm/uaccess.h>
++#include <asm/io_apic.h>
++#include <asm/idle.h>
++
++atomic_t irq_err_count;
++#ifdef CONFIG_X86_IO_APIC
++#ifdef APIC_MISMATCH_DEBUG
++atomic_t irq_mis_count;
++#endif
++#endif
++
++#ifdef CONFIG_DEBUG_STACKOVERFLOW
++/*
++ * Probabilistic stack overflow check:
++ *
++ * Only check the stack in process context, because everything else
++ * runs on the big interrupt stacks. Checking reliably is too expensive,
++ * so we just check from interrupts.
++ */
++static inline void stack_overflow_check(struct pt_regs *regs)
++{
++ u64 curbase = (u64) current->thread_info;
++ static unsigned long warned = -60*HZ;
++
++ if (regs->rsp >= curbase && regs->rsp <= curbase + THREAD_SIZE &&
++ regs->rsp < curbase + sizeof(struct thread_info) + 128 &&
++ time_after(jiffies, warned + 60*HZ)) {
++ printk("do_IRQ: %s near stack overflow (cur:%Lx,rsp:%lx)\n",
++ current->comm, curbase, regs->rsp);
++ show_stack(NULL,NULL);
++ warned = jiffies;
++ }
++}
++#endif
++
++/*
++ * Generic, controller-independent functions:
++ */
++
++int show_interrupts(struct seq_file *p, void *v)
++{
++ int i = *(loff_t *) v, j;
++ struct irqaction * action;
++ unsigned long flags;
++
++ if (i == 0) {
++ seq_printf(p, " ");
++ for_each_online_cpu(j)
++ seq_printf(p, "CPU%-8d",j);
++ seq_putc(p, '\n');
++ }
++
++ if (i < NR_IRQS) {
++ spin_lock_irqsave(&irq_desc[i].lock, flags);
++ action = irq_desc[i].action;
++ if (!action)
++ goto skip;
++ seq_printf(p, "%3d: ",i);
++#ifndef CONFIG_SMP
++ seq_printf(p, "%10u ", kstat_irqs(i));
++#else
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
++#endif
++ seq_printf(p, " %14s", irq_desc[i].chip->typename);
++
++ seq_printf(p, " %s", action->name);
++ for (action=action->next; action; action = action->next)
++ seq_printf(p, ", %s", action->name);
++ seq_putc(p, '\n');
++skip:
++ spin_unlock_irqrestore(&irq_desc[i].lock, flags);
++ } else if (i == NR_IRQS) {
++ seq_printf(p, "NMI: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", cpu_pda(j)->__nmi_count);
++ seq_putc(p, '\n');
++#ifdef CONFIG_X86_LOCAL_APIC
++ seq_printf(p, "LOC: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", cpu_pda(j)->apic_timer_irqs);
++ seq_putc(p, '\n');
++#endif
++ seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
++#ifdef CONFIG_X86_IO_APIC
++#ifdef APIC_MISMATCH_DEBUG
++ seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
++#endif
++#endif
++ }
++ return 0;
++}
++
++/*
++ * do_IRQ handles all normal device IRQ's (the special
++ * SMP cross-CPU interrupts have their own specific
++ * handlers).
++ */
++asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
++{
++ /* high bit used in ret_from_ code */
++ unsigned irq = ~regs->orig_rax;
++
++ if (unlikely(irq >= NR_IRQS)) {
++ printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
++ __FUNCTION__, irq);
++ BUG();
++ }
++
++ /*exit_idle();*/
++ /*irq_enter();*/
++#ifdef CONFIG_DEBUG_STACKOVERFLOW
++ stack_overflow_check(regs);
++#endif
++ __do_IRQ(irq, regs);
++ /*irq_exit();*/
++
++ return 1;
++}
++
++#ifdef CONFIG_HOTPLUG_CPU
++void fixup_irqs(cpumask_t map)
++{
++ unsigned int irq;
++ static int warned;
++
++ for (irq = 0; irq < NR_IRQS; irq++) {
++ cpumask_t mask;
++ if (irq == 2)
++ continue;
++
++ cpus_and(mask, irq_desc[irq].affinity, map);
++ if (any_online_cpu(mask) == NR_CPUS) {
++ /*printk("Breaking affinity for irq %i\n", irq);*/
++ mask = map;
++ }
++ if (irq_desc[irq].chip->set_affinity)
++ irq_desc[irq].chip->set_affinity(irq, mask);
++ else if (irq_desc[irq].action && !(warned++))
++ printk("Cannot set affinity for irq %i\n", irq);
++ }
++
++ /* That doesn't seem sufficient. Give it 1ms. */
++ local_irq_enable();
++ mdelay(1);
++ local_irq_disable();
++}
++#endif
++
++extern void call_softirq(void);
++
++asmlinkage void do_softirq(void)
++{
++ __u32 pending;
++ unsigned long flags;
++
++ if (in_interrupt())
++ return;
++
++ local_irq_save(flags);
++ pending = local_softirq_pending();
++ /* Switch to interrupt stack */
++ if (pending) {
++ call_softirq();
++ WARN_ON_ONCE(softirq_count());
++ }
++ local_irq_restore(flags);
++}
++EXPORT_SYMBOL(do_softirq);
++
++#ifndef CONFIG_X86_LOCAL_APIC
++/*
++ * 'what should we do if we get a hw irq event on an illegal vector'.
++ * each architecture has to answer this themselves.
++ */
++void ack_bad_irq(unsigned int irq)
++{
++ printk("unexpected IRQ trap at vector %02x\n", irq);
++}
++#endif
+Index: head-2008-11-25/arch/x86/kernel/ldt_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/ldt_64-xen.c 2007-06-12 13:13:01.000000000 +0200
+@@ -0,0 +1,282 @@
++/*
++ * linux/arch/x86_64/kernel/ldt.c
++ *
++ * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
++ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
++ * Copyright (C) 2002 Andi Kleen
++ *
++ * This handles calls from both 32bit and 64bit mode.
++ */
++
++#include <linux/errno.h>
++#include <linux/sched.h>
++#include <linux/string.h>
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/smp_lock.h>
++#include <linux/vmalloc.h>
++#include <linux/slab.h>
++
++#include <asm/uaccess.h>
++#include <asm/system.h>
++#include <asm/ldt.h>
++#include <asm/desc.h>
++#include <asm/proto.h>
++#include <asm/pgalloc.h>
++
++#ifdef CONFIG_SMP /* avoids "defined but not used" warnig */
++static void flush_ldt(void *null)
++{
++ if (current->active_mm)
++ load_LDT(¤t->active_mm->context);
++}
++#endif
++
++static int alloc_ldt(mm_context_t *pc, unsigned mincount, int reload)
++{
++ void *oldldt;
++ void *newldt;
++ unsigned oldsize;
++
++ if (mincount <= (unsigned)pc->size)
++ return 0;
++ oldsize = pc->size;
++ mincount = (mincount+511)&(~511);
++ if (mincount*LDT_ENTRY_SIZE > PAGE_SIZE)
++ newldt = vmalloc(mincount*LDT_ENTRY_SIZE);
++ else
++ newldt = kmalloc(mincount*LDT_ENTRY_SIZE, GFP_KERNEL);
++
++ if (!newldt)
++ return -ENOMEM;
++
++ if (oldsize)
++ memcpy(newldt, pc->ldt, oldsize*LDT_ENTRY_SIZE);
++ oldldt = pc->ldt;
++ memset(newldt+oldsize*LDT_ENTRY_SIZE, 0, (mincount-oldsize)*LDT_ENTRY_SIZE);
++ wmb();
++ pc->ldt = newldt;
++ wmb();
++ pc->size = mincount;
++ wmb();
++ if (reload) {
++#ifdef CONFIG_SMP
++ cpumask_t mask;
++
++ preempt_disable();
++#endif
++ make_pages_readonly(
++ pc->ldt,
++ (pc->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ load_LDT(pc);
++#ifdef CONFIG_SMP
++ mask = cpumask_of_cpu(smp_processor_id());
++ if (!cpus_equal(current->mm->cpu_vm_mask, mask))
++ smp_call_function(flush_ldt, NULL, 1, 1);
++ preempt_enable();
++#endif
++ }
++ if (oldsize) {
++ make_pages_writable(
++ oldldt,
++ (oldsize * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ if (oldsize*LDT_ENTRY_SIZE > PAGE_SIZE)
++ vfree(oldldt);
++ else
++ kfree(oldldt);
++ }
++ return 0;
++}
++
++static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
++{
++ int err = alloc_ldt(new, old->size, 0);
++ if (err < 0)
++ return err;
++ memcpy(new->ldt, old->ldt, old->size*LDT_ENTRY_SIZE);
++ make_pages_readonly(
++ new->ldt,
++ (new->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ return 0;
++}
++
++/*
++ * we do not have to muck with descriptors here, that is
++ * done in switch_mm() as needed.
++ */
++int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
++{
++ struct mm_struct * old_mm;
++ int retval = 0;
++
++ memset(&mm->context, 0, sizeof(mm->context));
++ init_MUTEX(&mm->context.sem);
++ old_mm = current->mm;
++ if (old_mm && old_mm->context.size > 0) {
++ down(&old_mm->context.sem);
++ retval = copy_ldt(&mm->context, &old_mm->context);
++ up(&old_mm->context.sem);
++ }
++ if (retval == 0) {
++ spin_lock(&mm_unpinned_lock);
++ list_add(&mm->context.unpinned, &mm_unpinned);
++ spin_unlock(&mm_unpinned_lock);
++ }
++ return retval;
++}
++
++/*
++ *
++ * Don't touch the LDT register - we're already in the next thread.
++ */
++void destroy_context(struct mm_struct *mm)
++{
++ if (mm->context.size) {
++ if (mm == current->active_mm)
++ clear_LDT();
++ make_pages_writable(
++ mm->context.ldt,
++ (mm->context.size * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ if (mm->context.size*LDT_ENTRY_SIZE > PAGE_SIZE)
++ vfree(mm->context.ldt);
++ else
++ kfree(mm->context.ldt);
++ mm->context.size = 0;
++ }
++ if (!mm->context.pinned) {
++ spin_lock(&mm_unpinned_lock);
++ list_del(&mm->context.unpinned);
++ spin_unlock(&mm_unpinned_lock);
++ }
++}
++
++static int read_ldt(void __user * ptr, unsigned long bytecount)
++{
++ int err;
++ unsigned long size;
++ struct mm_struct * mm = current->mm;
++
++ if (!mm->context.size)
++ return 0;
++ if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
++ bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
++
++ down(&mm->context.sem);
++ size = mm->context.size*LDT_ENTRY_SIZE;
++ if (size > bytecount)
++ size = bytecount;
++
++ err = 0;
++ if (copy_to_user(ptr, mm->context.ldt, size))
++ err = -EFAULT;
++ up(&mm->context.sem);
++ if (err < 0)
++ goto error_return;
++ if (size != bytecount) {
++ /* zero-fill the rest */
++ if (clear_user(ptr+size, bytecount-size) != 0) {
++ err = -EFAULT;
++ goto error_return;
++ }
++ }
++ return bytecount;
++error_return:
++ return err;
++}
++
++static int read_default_ldt(void __user * ptr, unsigned long bytecount)
++{
++ /* Arbitrary number */
++ /* x86-64 default LDT is all zeros */
++ if (bytecount > 128)
++ bytecount = 128;
++ if (clear_user(ptr, bytecount))
++ return -EFAULT;
++ return bytecount;
++}
++
++static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
++{
++ struct task_struct *me = current;
++ struct mm_struct * mm = me->mm;
++ __u32 entry_1, entry_2, *lp;
++ unsigned long mach_lp;
++ int error;
++ struct user_desc ldt_info;
++
++ error = -EINVAL;
++
++ if (bytecount != sizeof(ldt_info))
++ goto out;
++ error = -EFAULT;
++ if (copy_from_user(&ldt_info, ptr, bytecount))
++ goto out;
++
++ error = -EINVAL;
++ if (ldt_info.entry_number >= LDT_ENTRIES)
++ goto out;
++ if (ldt_info.contents == 3) {
++ if (oldmode)
++ goto out;
++ if (ldt_info.seg_not_present == 0)
++ goto out;
++ }
++
++ down(&mm->context.sem);
++ if (ldt_info.entry_number >= (unsigned)mm->context.size) {
++ error = alloc_ldt(¤t->mm->context, ldt_info.entry_number+1, 1);
++ if (error < 0)
++ goto out_unlock;
++ }
++
++ lp = (__u32 *) ((ldt_info.entry_number << 3) + (char *) mm->context.ldt);
++ mach_lp = arbitrary_virt_to_machine(lp);
++
++ /* Allow LDTs to be cleared by the user. */
++ if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
++ if (oldmode || LDT_empty(&ldt_info)) {
++ entry_1 = 0;
++ entry_2 = 0;
++ goto install;
++ }
++ }
++
++ entry_1 = LDT_entry_a(&ldt_info);
++ entry_2 = LDT_entry_b(&ldt_info);
++ if (oldmode)
++ entry_2 &= ~(1 << 20);
++
++ /* Install the new entry ... */
++install:
++ error = HYPERVISOR_update_descriptor(mach_lp, (unsigned long)((entry_1 | (unsigned long) entry_2 << 32)));
++
++out_unlock:
++ up(&mm->context.sem);
++out:
++ return error;
++}
++
++asmlinkage int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
++{
++ int ret = -ENOSYS;
++
++ switch (func) {
++ case 0:
++ ret = read_ldt(ptr, bytecount);
++ break;
++ case 1:
++ ret = write_ldt(ptr, bytecount, 1);
++ break;
++ case 2:
++ ret = read_default_ldt(ptr, bytecount);
++ break;
++ case 0x11:
++ ret = write_ldt(ptr, bytecount, 0);
++ break;
++ }
++ return ret;
++}
+Index: head-2008-11-25/arch/x86/kernel/mpparse_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/mpparse_64-xen.c 2007-06-12 13:13:01.000000000 +0200
+@@ -0,0 +1,1011 @@
++/*
++ * Intel Multiprocessor Specification 1.1 and 1.4
++ * compliant MP-table parsing routines.
++ *
++ * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
++ * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
++ *
++ * Fixes
++ * Erich Boleyn : MP v1.4 and additional changes.
++ * Alan Cox : Added EBDA scanning
++ * Ingo Molnar : various cleanups and rewrites
++ * Maciej W. Rozycki: Bits for default MP configurations
++ * Paul Diefenbaugh: Added full ACPI support
++ */
++
++#include <linux/mm.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/bootmem.h>
++#include <linux/smp_lock.h>
++#include <linux/kernel_stat.h>
++#include <linux/mc146818rtc.h>
++#include <linux/acpi.h>
++#include <linux/module.h>
++
++#include <asm/smp.h>
++#include <asm/mtrr.h>
++#include <asm/mpspec.h>
++#include <asm/pgalloc.h>
++#include <asm/io_apic.h>
++#include <asm/proto.h>
++#include <asm/acpi.h>
++
++/* Have we found an MP table */
++int smp_found_config;
++unsigned int __initdata maxcpus = NR_CPUS;
++
++int acpi_found_madt;
++
++/*
++ * Various Linux-internal data structures created from the
++ * MP-table.
++ */
++unsigned char apic_version [MAX_APICS];
++unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
++int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
++
++static int mp_current_pci_id = 0;
++/* I/O APIC entries */
++struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
++
++/* # of MP IRQ source entries */
++struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
++
++/* MP IRQ source entries */
++int mp_irq_entries;
++
++int nr_ioapics;
++int pic_mode;
++unsigned long mp_lapic_addr = 0;
++
++
++
++/* Processor that is doing the boot up */
++unsigned int boot_cpu_id = -1U;
++/* Internal processor count */
++unsigned int num_processors __initdata = 0;
++
++unsigned disabled_cpus __initdata;
++
++/* Bitmask of physically existing CPUs */
++physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
++
++/* ACPI MADT entry parsing functions */
++#ifdef CONFIG_ACPI
++extern struct acpi_boot_flags acpi_boot;
++#ifdef CONFIG_X86_LOCAL_APIC
++extern int acpi_parse_lapic (acpi_table_entry_header *header);
++extern int acpi_parse_lapic_addr_ovr (acpi_table_entry_header *header);
++extern int acpi_parse_lapic_nmi (acpi_table_entry_header *header);
++#endif /*CONFIG_X86_LOCAL_APIC*/
++#ifdef CONFIG_X86_IO_APIC
++extern int acpi_parse_ioapic (acpi_table_entry_header *header);
++#endif /*CONFIG_X86_IO_APIC*/
++#endif /*CONFIG_ACPI*/
++
++u8 bios_cpu_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
++
++
++/*
++ * Intel MP BIOS table parsing routines:
++ */
++
++/*
++ * Checksum an MP configuration block.
++ */
++
++static int __init mpf_checksum(unsigned char *mp, int len)
++{
++ int sum = 0;
++
++ while (len--)
++ sum += *mp++;
++
++ return sum & 0xFF;
++}
++
++#ifndef CONFIG_XEN
++static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
++{
++ int cpu;
++ unsigned char ver;
++ cpumask_t tmp_map;
++
++ if (!(m->mpc_cpuflag & CPU_ENABLED)) {
++ disabled_cpus++;
++ return;
++ }
++
++ printk(KERN_INFO "Processor #%d %d:%d APIC version %d\n",
++ m->mpc_apicid,
++ (m->mpc_cpufeature & CPU_FAMILY_MASK)>>8,
++ (m->mpc_cpufeature & CPU_MODEL_MASK)>>4,
++ m->mpc_apicver);
++
++ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
++ Dprintk(" Bootup CPU\n");
++ boot_cpu_id = m->mpc_apicid;
++ }
++ if (num_processors >= NR_CPUS) {
++ printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
++ " Processor ignored.\n", NR_CPUS);
++ return;
++ }
++
++ num_processors++;
++ cpus_complement(tmp_map, cpu_present_map);
++ cpu = first_cpu(tmp_map);
++
++#if MAX_APICS < 255
++ if ((int)m->mpc_apicid > MAX_APICS) {
++ printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
++ m->mpc_apicid, MAX_APICS);
++ return;
++ }
++#endif
++ ver = m->mpc_apicver;
++
++ physid_set(m->mpc_apicid, phys_cpu_present_map);
++ /*
++ * Validate version
++ */
++ if (ver == 0x0) {
++ printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! fixing up to 0x10. (tell your hw vendor)\n", m->mpc_apicid);
++ ver = 0x10;
++ }
++ apic_version[m->mpc_apicid] = ver;
++ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
++ /*
++ * bios_cpu_apicid is required to have processors listed
++ * in same order as logical cpu numbers. Hence the first
++ * entry is BSP, and so on.
++ */
++ cpu = 0;
++ }
++ bios_cpu_apicid[cpu] = m->mpc_apicid;
++ x86_cpu_to_apicid[cpu] = m->mpc_apicid;
++
++ cpu_set(cpu, cpu_possible_map);
++ cpu_set(cpu, cpu_present_map);
++}
++#else
++static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
++{
++ num_processors++;
++}
++#endif /* CONFIG_XEN */
++
++static void __init MP_bus_info (struct mpc_config_bus *m)
++{
++ char str[7];
++
++ memcpy(str, m->mpc_bustype, 6);
++ str[6] = 0;
++ Dprintk("Bus #%d is %s\n", m->mpc_busid, str);
++
++ if (strncmp(str, "ISA", 3) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
++ } else if (strncmp(str, "EISA", 4) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_EISA;
++ } else if (strncmp(str, "PCI", 3) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI;
++ mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
++ mp_current_pci_id++;
++ } else if (strncmp(str, "MCA", 3) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
++ } else {
++ printk(KERN_ERR "Unknown bustype %s\n", str);
++ }
++}
++
++static void __init MP_ioapic_info (struct mpc_config_ioapic *m)
++{
++ if (!(m->mpc_flags & MPC_APIC_USABLE))
++ return;
++
++ printk("I/O APIC #%d Version %d at 0x%X.\n",
++ m->mpc_apicid, m->mpc_apicver, m->mpc_apicaddr);
++ if (nr_ioapics >= MAX_IO_APICS) {
++ printk(KERN_ERR "Max # of I/O APICs (%d) exceeded (found %d).\n",
++ MAX_IO_APICS, nr_ioapics);
++ panic("Recompile kernel with bigger MAX_IO_APICS!.\n");
++ }
++ if (!m->mpc_apicaddr) {
++ printk(KERN_ERR "WARNING: bogus zero I/O APIC address"
++ " found in MP table, skipping!\n");
++ return;
++ }
++ mp_ioapics[nr_ioapics] = *m;
++ nr_ioapics++;
++}
++
++static void __init MP_intsrc_info (struct mpc_config_intsrc *m)
++{
++ mp_irqs [mp_irq_entries] = *m;
++ Dprintk("Int: type %d, pol %d, trig %d, bus %d,"
++ " IRQ %02x, APIC ID %x, APIC INT %02x\n",
++ m->mpc_irqtype, m->mpc_irqflag & 3,
++ (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
++ m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
++ if (++mp_irq_entries >= MAX_IRQ_SOURCES)
++ panic("Max # of irq sources exceeded!!\n");
++}
++
++static void __init MP_lintsrc_info (struct mpc_config_lintsrc *m)
++{
++ Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
++ " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
++ m->mpc_irqtype, m->mpc_irqflag & 3,
++ (m->mpc_irqflag >> 2) &3, m->mpc_srcbusid,
++ m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
++ /*
++ * Well it seems all SMP boards in existence
++ * use ExtINT/LVT1 == LINT0 and
++ * NMI/LVT2 == LINT1 - the following check
++ * will show us if this assumptions is false.
++ * Until then we do not have to add baggage.
++ */
++ if ((m->mpc_irqtype == mp_ExtINT) &&
++ (m->mpc_destapiclint != 0))
++ BUG();
++ if ((m->mpc_irqtype == mp_NMI) &&
++ (m->mpc_destapiclint != 1))
++ BUG();
++}
++
++/*
++ * Read/parse the MPC
++ */
++
++static int __init smp_read_mpc(struct mp_config_table *mpc)
++{
++ char str[16];
++ int count=sizeof(*mpc);
++ unsigned char *mpt=((unsigned char *)mpc)+count;
++
++ if (memcmp(mpc->mpc_signature,MPC_SIGNATURE,4)) {
++ printk("SMP mptable: bad signature [%c%c%c%c]!\n",
++ mpc->mpc_signature[0],
++ mpc->mpc_signature[1],
++ mpc->mpc_signature[2],
++ mpc->mpc_signature[3]);
++ return 0;
++ }
++ if (mpf_checksum((unsigned char *)mpc,mpc->mpc_length)) {
++ printk("SMP mptable: checksum error!\n");
++ return 0;
++ }
++ if (mpc->mpc_spec!=0x01 && mpc->mpc_spec!=0x04) {
++ printk(KERN_ERR "SMP mptable: bad table version (%d)!!\n",
++ mpc->mpc_spec);
++ return 0;
++ }
++ if (!mpc->mpc_lapic) {
++ printk(KERN_ERR "SMP mptable: null local APIC address!\n");
++ return 0;
++ }
++ memcpy(str,mpc->mpc_oem,8);
++ str[8]=0;
++ printk(KERN_INFO "OEM ID: %s ",str);
++
++ memcpy(str,mpc->mpc_productid,12);
++ str[12]=0;
++ printk("Product ID: %s ",str);
++
++ printk("APIC at: 0x%X\n",mpc->mpc_lapic);
++
++ /* save the local APIC address, it might be non-default */
++ if (!acpi_lapic)
++ mp_lapic_addr = mpc->mpc_lapic;
++
++ /*
++ * Now process the configuration blocks.
++ */
++ while (count < mpc->mpc_length) {
++ switch(*mpt) {
++ case MP_PROCESSOR:
++ {
++ struct mpc_config_processor *m=
++ (struct mpc_config_processor *)mpt;
++ if (!acpi_lapic)
++ MP_processor_info(m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ case MP_BUS:
++ {
++ struct mpc_config_bus *m=
++ (struct mpc_config_bus *)mpt;
++ MP_bus_info(m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ case MP_IOAPIC:
++ {
++ struct mpc_config_ioapic *m=
++ (struct mpc_config_ioapic *)mpt;
++ MP_ioapic_info(m);
++ mpt+=sizeof(*m);
++ count+=sizeof(*m);
++ break;
++ }
++ case MP_INTSRC:
++ {
++ struct mpc_config_intsrc *m=
++ (struct mpc_config_intsrc *)mpt;
++
++ MP_intsrc_info(m);
++ mpt+=sizeof(*m);
++ count+=sizeof(*m);
++ break;
++ }
++ case MP_LINTSRC:
++ {
++ struct mpc_config_lintsrc *m=
++ (struct mpc_config_lintsrc *)mpt;
++ MP_lintsrc_info(m);
++ mpt+=sizeof(*m);
++ count+=sizeof(*m);
++ break;
++ }
++ }
++ }
++ clustered_apic_check();
++ if (!num_processors)
++ printk(KERN_ERR "SMP mptable: no processors registered!\n");
++ return num_processors;
++}
++
++static int __init ELCR_trigger(unsigned int irq)
++{
++ unsigned int port;
++
++ port = 0x4d0 + (irq >> 3);
++ return (inb(port) >> (irq & 7)) & 1;
++}
++
++static void __init construct_default_ioirq_mptable(int mpc_default_type)
++{
++ struct mpc_config_intsrc intsrc;
++ int i;
++ int ELCR_fallback = 0;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqflag = 0; /* conforming */
++ intsrc.mpc_srcbus = 0;
++ intsrc.mpc_dstapic = mp_ioapics[0].mpc_apicid;
++
++ intsrc.mpc_irqtype = mp_INT;
++
++ /*
++ * If true, we have an ISA/PCI system with no IRQ entries
++ * in the MP table. To prevent the PCI interrupts from being set up
++ * incorrectly, we try to use the ELCR. The sanity check to see if
++ * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
++ * never be level sensitive, so we simply see if the ELCR agrees.
++ * If it does, we assume it's valid.
++ */
++ if (mpc_default_type == 5) {
++ printk(KERN_INFO "ISA/PCI bus type with no IRQ information... falling back to ELCR\n");
++
++ if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) || ELCR_trigger(13))
++ printk(KERN_ERR "ELCR contains invalid data... not using ELCR\n");
++ else {
++ printk(KERN_INFO "Using ELCR to identify PCI interrupts\n");
++ ELCR_fallback = 1;
++ }
++ }
++
++ for (i = 0; i < 16; i++) {
++ switch (mpc_default_type) {
++ case 2:
++ if (i == 0 || i == 13)
++ continue; /* IRQ0 & IRQ13 not connected */
++ /* fall through */
++ default:
++ if (i == 2)
++ continue; /* IRQ2 is never connected */
++ }
++
++ if (ELCR_fallback) {
++ /*
++ * If the ELCR indicates a level-sensitive interrupt, we
++ * copy that information over to the MP table in the
++ * irqflag field (level sensitive, active high polarity).
++ */
++ if (ELCR_trigger(i))
++ intsrc.mpc_irqflag = 13;
++ else
++ intsrc.mpc_irqflag = 0;
++ }
++
++ intsrc.mpc_srcbusirq = i;
++ intsrc.mpc_dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
++ MP_intsrc_info(&intsrc);
++ }
++
++ intsrc.mpc_irqtype = mp_ExtINT;
++ intsrc.mpc_srcbusirq = 0;
++ intsrc.mpc_dstirq = 0; /* 8259A to INTIN0 */
++ MP_intsrc_info(&intsrc);
++}
++
++static inline void __init construct_default_ISA_mptable(int mpc_default_type)
++{
++ struct mpc_config_processor processor;
++ struct mpc_config_bus bus;
++ struct mpc_config_ioapic ioapic;
++ struct mpc_config_lintsrc lintsrc;
++ int linttypes[2] = { mp_ExtINT, mp_NMI };
++ int i;
++
++ /*
++ * local APIC has default address
++ */
++ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
++
++ /*
++ * 2 CPUs, numbered 0 & 1.
++ */
++ processor.mpc_type = MP_PROCESSOR;
++ /* Either an integrated APIC or a discrete 82489DX. */
++ processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ processor.mpc_cpuflag = CPU_ENABLED;
++ processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
++ (boot_cpu_data.x86_model << 4) |
++ boot_cpu_data.x86_mask;
++ processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
++ processor.mpc_reserved[0] = 0;
++ processor.mpc_reserved[1] = 0;
++ for (i = 0; i < 2; i++) {
++ processor.mpc_apicid = i;
++ MP_processor_info(&processor);
++ }
++
++ bus.mpc_type = MP_BUS;
++ bus.mpc_busid = 0;
++ switch (mpc_default_type) {
++ default:
++ printk(KERN_ERR "???\nUnknown standard configuration %d\n",
++ mpc_default_type);
++ /* fall through */
++ case 1:
++ case 5:
++ memcpy(bus.mpc_bustype, "ISA ", 6);
++ break;
++ case 2:
++ case 6:
++ case 3:
++ memcpy(bus.mpc_bustype, "EISA ", 6);
++ break;
++ case 4:
++ case 7:
++ memcpy(bus.mpc_bustype, "MCA ", 6);
++ }
++ MP_bus_info(&bus);
++ if (mpc_default_type > 4) {
++ bus.mpc_busid = 1;
++ memcpy(bus.mpc_bustype, "PCI ", 6);
++ MP_bus_info(&bus);
++ }
++
++ ioapic.mpc_type = MP_IOAPIC;
++ ioapic.mpc_apicid = 2;
++ ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ ioapic.mpc_flags = MPC_APIC_USABLE;
++ ioapic.mpc_apicaddr = 0xFEC00000;
++ MP_ioapic_info(&ioapic);
++
++ /*
++ * We set up most of the low 16 IO-APIC pins according to MPS rules.
++ */
++ construct_default_ioirq_mptable(mpc_default_type);
++
++ lintsrc.mpc_type = MP_LINTSRC;
++ lintsrc.mpc_irqflag = 0; /* conforming */
++ lintsrc.mpc_srcbusid = 0;
++ lintsrc.mpc_srcbusirq = 0;
++ lintsrc.mpc_destapic = MP_APIC_ALL;
++ for (i = 0; i < 2; i++) {
++ lintsrc.mpc_irqtype = linttypes[i];
++ lintsrc.mpc_destapiclint = i;
++ MP_lintsrc_info(&lintsrc);
++ }
++}
++
++static struct intel_mp_floating *mpf_found;
++
++/*
++ * Scan the memory blocks for an SMP configuration block.
++ */
++void __init get_smp_config (void)
++{
++ struct intel_mp_floating *mpf = mpf_found;
++
++ /*
++ * ACPI supports both logical (e.g. Hyper-Threading) and physical
++ * processors, where MPS only supports physical.
++ */
++ if (acpi_lapic && acpi_ioapic) {
++ printk(KERN_INFO "Using ACPI (MADT) for SMP configuration information\n");
++ return;
++ }
++ else if (acpi_lapic)
++ printk(KERN_INFO "Using ACPI for processor (LAPIC) configuration information\n");
++
++ printk("Intel MultiProcessor Specification v1.%d\n", mpf->mpf_specification);
++ if (mpf->mpf_feature2 & (1<<7)) {
++ printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
++ pic_mode = 1;
++ } else {
++ printk(KERN_INFO " Virtual Wire compatibility mode.\n");
++ pic_mode = 0;
++ }
++
++ /*
++ * Now see if we need to read further.
++ */
++ if (mpf->mpf_feature1 != 0) {
++
++ printk(KERN_INFO "Default MP configuration #%d\n", mpf->mpf_feature1);
++ construct_default_ISA_mptable(mpf->mpf_feature1);
++
++ } else if (mpf->mpf_physptr) {
++
++ /*
++ * Read the physical hardware table. Anything here will
++ * override the defaults.
++ */
++ if (!smp_read_mpc(isa_bus_to_virt(mpf->mpf_physptr))) {
++ smp_found_config = 0;
++ printk(KERN_ERR "BIOS bug, MP table errors detected!...\n");
++ printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
++ return;
++ }
++ /*
++ * If there are no explicit MP IRQ entries, then we are
++ * broken. We set up most of the low 16 IO-APIC pins to
++ * ISA defaults and hope it will work.
++ */
++ if (!mp_irq_entries) {
++ struct mpc_config_bus bus;
++
++ printk(KERN_ERR "BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n");
++
++ bus.mpc_type = MP_BUS;
++ bus.mpc_busid = 0;
++ memcpy(bus.mpc_bustype, "ISA ", 6);
++ MP_bus_info(&bus);
++
++ construct_default_ioirq_mptable(0);
++ }
++
++ } else
++ BUG();
++
++ printk(KERN_INFO "Processors: %d\n", num_processors);
++ /*
++ * Only use the first configuration found.
++ */
++}
++
++static int __init smp_scan_config (unsigned long base, unsigned long length)
++{
++ extern void __bad_mpf_size(void);
++ unsigned int *bp = isa_bus_to_virt(base);
++ struct intel_mp_floating *mpf;
++
++ Dprintk("Scan SMP from %p for %ld bytes.\n", bp,length);
++ if (sizeof(*mpf) != 16)
++ __bad_mpf_size();
++
++ while (length > 0) {
++ mpf = (struct intel_mp_floating *)bp;
++ if ((*bp == SMP_MAGIC_IDENT) &&
++ (mpf->mpf_length == 1) &&
++ !mpf_checksum((unsigned char *)bp, 16) &&
++ ((mpf->mpf_specification == 1)
++ || (mpf->mpf_specification == 4)) ) {
++
++ smp_found_config = 1;
++ mpf_found = mpf;
++ return 1;
++ }
++ bp += 4;
++ length -= 16;
++ }
++ return 0;
++}
++
++void __init find_intel_smp (void)
++{
++ unsigned int address;
++
++ /*
++ * FIXME: Linux assumes you have 640K of base ram..
++ * this continues the error...
++ *
++ * 1) Scan the bottom 1K for a signature
++ * 2) Scan the top 1K of base RAM
++ * 3) Scan the 64K of bios
++ */
++ if (smp_scan_config(0x0,0x400) ||
++ smp_scan_config(639*0x400,0x400) ||
++ smp_scan_config(0xF0000,0x10000))
++ return;
++ /*
++ * If it is an SMP machine we should know now, unless the
++ * configuration is in an EISA/MCA bus machine with an
++ * extended bios data area.
++ *
++ * there is a real-mode segmented pointer pointing to the
++ * 4K EBDA area at 0x40E, calculate and scan it here.
++ *
++ * NOTE! There are Linux loaders that will corrupt the EBDA
++ * area, and as such this kind of SMP config may be less
++ * trustworthy, simply because the SMP table may have been
++ * stomped on during early boot. These loaders are buggy and
++ * should be fixed.
++ */
++
++ address = *(unsigned short *)phys_to_virt(0x40E);
++ address <<= 4;
++ if (smp_scan_config(address, 0x1000))
++ return;
++
++ /* If we have come this far, we did not find an MP table */
++ printk(KERN_INFO "No mptable found.\n");
++}
++
++/*
++ * - Intel MP Configuration Table
++ */
++void __init find_smp_config (void)
++{
++#ifdef CONFIG_X86_LOCAL_APIC
++ find_intel_smp();
++#endif
++}
++
++
++/* --------------------------------------------------------------------------
++ ACPI-based MP Configuration
++ -------------------------------------------------------------------------- */
++
++#ifdef CONFIG_ACPI
++
++void __init mp_register_lapic_address (
++ u64 address)
++{
++#ifndef CONFIG_XEN
++ mp_lapic_addr = (unsigned long) address;
++
++ set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
++
++ if (boot_cpu_id == -1U)
++ boot_cpu_id = GET_APIC_ID(apic_read(APIC_ID));
++
++ Dprintk("Boot CPU = %d\n", boot_cpu_physical_apicid);
++#endif
++}
++
++
++void __cpuinit mp_register_lapic (
++ u8 id,
++ u8 enabled)
++{
++ struct mpc_config_processor processor;
++ int boot_cpu = 0;
++
++ if (id >= MAX_APICS) {
++ printk(KERN_WARNING "Processor #%d invalid (max %d)\n",
++ id, MAX_APICS);
++ return;
++ }
++
++ if (id == boot_cpu_physical_apicid)
++ boot_cpu = 1;
++
++#ifndef CONFIG_XEN
++ processor.mpc_type = MP_PROCESSOR;
++ processor.mpc_apicid = id;
++ processor.mpc_apicver = GET_APIC_VERSION(apic_read(APIC_LVR));
++ processor.mpc_cpuflag = (enabled ? CPU_ENABLED : 0);
++ processor.mpc_cpuflag |= (boot_cpu ? CPU_BOOTPROCESSOR : 0);
++ processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
++ (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
++ processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
++ processor.mpc_reserved[0] = 0;
++ processor.mpc_reserved[1] = 0;
++#endif
++
++ MP_processor_info(&processor);
++}
++
++#ifdef CONFIG_X86_IO_APIC
++
++#define MP_ISA_BUS 0
++#define MP_MAX_IOAPIC_PIN 127
++
++static struct mp_ioapic_routing {
++ int apic_id;
++ int gsi_start;
++ int gsi_end;
++ u32 pin_programmed[4];
++} mp_ioapic_routing[MAX_IO_APICS];
++
++
++static int mp_find_ioapic (
++ int gsi)
++{
++ int i = 0;
++
++ /* Find the IOAPIC that manages this GSI. */
++ for (i = 0; i < nr_ioapics; i++) {
++ if ((gsi >= mp_ioapic_routing[i].gsi_start)
++ && (gsi <= mp_ioapic_routing[i].gsi_end))
++ return i;
++ }
++
++ printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
++
++ return -1;
++}
++
++
++void __init mp_register_ioapic (
++ u8 id,
++ u32 address,
++ u32 gsi_base)
++{
++ int idx = 0;
++
++ if (nr_ioapics >= MAX_IO_APICS) {
++ printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
++ "(found %d)\n", MAX_IO_APICS, nr_ioapics);
++ panic("Recompile kernel with bigger MAX_IO_APICS!\n");
++ }
++ if (!address) {
++ printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
++ " found in MADT table, skipping!\n");
++ return;
++ }
++
++ idx = nr_ioapics++;
++
++ mp_ioapics[idx].mpc_type = MP_IOAPIC;
++ mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
++ mp_ioapics[idx].mpc_apicaddr = address;
++
++#ifndef CONFIG_XEN
++ set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
++#endif
++ mp_ioapics[idx].mpc_apicid = id;
++ mp_ioapics[idx].mpc_apicver = io_apic_get_version(idx);
++
++ /*
++ * Build basic IRQ lookup table to facilitate gsi->io_apic lookups
++ * and to prevent reprogramming of IOAPIC pins (PCI IRQs).
++ */
++ mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid;
++ mp_ioapic_routing[idx].gsi_start = gsi_base;
++ mp_ioapic_routing[idx].gsi_end = gsi_base +
++ io_apic_get_redir_entries(idx);
++
++ printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
++ "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
++ mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
++ mp_ioapic_routing[idx].gsi_start,
++ mp_ioapic_routing[idx].gsi_end);
++
++ return;
++}
++
++
++void __init mp_override_legacy_irq (
++ u8 bus_irq,
++ u8 polarity,
++ u8 trigger,
++ u32 gsi)
++{
++ struct mpc_config_intsrc intsrc;
++ int ioapic = -1;
++ int pin = -1;
++
++ /*
++ * Convert 'gsi' to 'ioapic.pin'.
++ */
++ ioapic = mp_find_ioapic(gsi);
++ if (ioapic < 0)
++ return;
++ pin = gsi - mp_ioapic_routing[ioapic].gsi_start;
++
++ /*
++ * TBD: This check is for faulty timer entries, where the override
++ * erroneously sets the trigger to level, resulting in a HUGE
++ * increase of timer interrupts!
++ */
++ if ((bus_irq == 0) && (trigger == 3))
++ trigger = 1;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqtype = mp_INT;
++ intsrc.mpc_irqflag = (trigger << 2) | polarity;
++ intsrc.mpc_srcbus = MP_ISA_BUS;
++ intsrc.mpc_srcbusirq = bus_irq; /* IRQ */
++ intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; /* APIC ID */
++ intsrc.mpc_dstirq = pin; /* INTIN# */
++
++ Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, %d-%d\n",
++ intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
++ (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
++ intsrc.mpc_srcbusirq, intsrc.mpc_dstapic, intsrc.mpc_dstirq);
++
++ mp_irqs[mp_irq_entries] = intsrc;
++ if (++mp_irq_entries == MAX_IRQ_SOURCES)
++ panic("Max # of irq sources exceeded!\n");
++
++ return;
++}
++
++
++void __init mp_config_acpi_legacy_irqs (void)
++{
++ struct mpc_config_intsrc intsrc;
++ int i = 0;
++ int ioapic = -1;
++
++ /*
++ * Fabricate the legacy ISA bus (bus #31).
++ */
++ mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
++ Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
++
++ /*
++ * Locate the IOAPIC that manages the ISA IRQs (0-15).
++ */
++ ioapic = mp_find_ioapic(0);
++ if (ioapic < 0)
++ return;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqflag = 0; /* Conforming */
++ intsrc.mpc_srcbus = MP_ISA_BUS;
++ intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid;
++
++ /*
++ * Use the default configuration for the IRQs 0-15. Unless
++ * overridden by (MADT) interrupt source override entries.
++ */
++ for (i = 0; i < 16; i++) {
++ int idx;
++
++ for (idx = 0; idx < mp_irq_entries; idx++) {
++ struct mpc_config_intsrc *irq = mp_irqs + idx;
++
++ /* Do we already have a mapping for this ISA IRQ? */
++ if (irq->mpc_srcbus == MP_ISA_BUS && irq->mpc_srcbusirq == i)
++ break;
++
++ /* Do we already have a mapping for this IOAPIC pin */
++ if ((irq->mpc_dstapic == intsrc.mpc_dstapic) &&
++ (irq->mpc_dstirq == i))
++ break;
++ }
++
++ if (idx != mp_irq_entries) {
++ printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
++ continue; /* IRQ already used */
++ }
++
++ intsrc.mpc_irqtype = mp_INT;
++ intsrc.mpc_srcbusirq = i; /* Identity mapped */
++ intsrc.mpc_dstirq = i;
++
++ Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, "
++ "%d-%d\n", intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
++ (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
++ intsrc.mpc_srcbusirq, intsrc.mpc_dstapic,
++ intsrc.mpc_dstirq);
++
++ mp_irqs[mp_irq_entries] = intsrc;
++ if (++mp_irq_entries == MAX_IRQ_SOURCES)
++ panic("Max # of irq sources exceeded!\n");
++ }
++
++ return;
++}
++
++#define MAX_GSI_NUM 4096
++
++int mp_register_gsi(u32 gsi, int triggering, int polarity)
++{
++ int ioapic = -1;
++ int ioapic_pin = 0;
++ int idx, bit = 0;
++ static int pci_irq = 16;
++ /*
++ * Mapping between Global System Interrupts, which
++ * represent all possible interrupts, to the IRQs
++ * assigned to actual devices.
++ */
++ static int gsi_to_irq[MAX_GSI_NUM];
++
++ if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
++ return gsi;
++
++ /* Don't set up the ACPI SCI because it's already set up */
++ if (acpi_fadt.sci_int == gsi)
++ return gsi;
++
++ ioapic = mp_find_ioapic(gsi);
++ if (ioapic < 0) {
++ printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
++ return gsi;
++ }
++
++ ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_start;
++
++ /*
++ * Avoid pin reprogramming. PRTs typically include entries
++ * with redundant pin->gsi mappings (but unique PCI devices);
++ * we only program the IOAPIC on the first.
++ */
++ bit = ioapic_pin % 32;
++ idx = (ioapic_pin < 32) ? 0 : (ioapic_pin / 32);
++ if (idx > 3) {
++ printk(KERN_ERR "Invalid reference to IOAPIC pin "
++ "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
++ ioapic_pin);
++ return gsi;
++ }
++ if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
++ Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
++ mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
++ return gsi_to_irq[gsi];
++ }
++
++ mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit);
++
++ if (triggering == ACPI_LEVEL_SENSITIVE) {
++ /*
++ * For PCI devices assign IRQs in order, avoiding gaps
++ * due to unused I/O APIC pins.
++ */
++ int irq = gsi;
++ if (gsi < MAX_GSI_NUM) {
++ /*
++ * Retain the VIA chipset work-around (gsi > 15), but
++ * avoid a problem where the 8254 timer (IRQ0) is setup
++ * via an override (so it's not on pin 0 of the ioapic),
++ * and at the same time, the pin 0 interrupt is a PCI
++ * type. The gsi > 15 test could cause these two pins
++ * to be shared as IRQ0, and they are not shareable.
++ * So test for this condition, and if necessary, avoid
++ * the pin collision.
++ */
++ if (gsi > 15 || (gsi == 0 && !timer_uses_ioapic_pin_0))
++ gsi = pci_irq++;
++ /*
++ * Don't assign IRQ used by ACPI SCI
++ */
++ if (gsi == acpi_fadt.sci_int)
++ gsi = pci_irq++;
++ gsi_to_irq[irq] = gsi;
++ } else {
++ printk(KERN_ERR "GSI %u is too high\n", gsi);
++ return gsi;
++ }
++ }
++
++ io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
++ triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
++ polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
++ return gsi;
++}
++
++#endif /*CONFIG_X86_IO_APIC*/
++#endif /*CONFIG_ACPI*/
+Index: head-2008-11-25/arch/x86/kernel/process_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/process_64-xen.c 2008-08-07 12:44:36.000000000 +0200
+@@ -0,0 +1,848 @@
++/*
++ * linux/arch/x86-64/kernel/process.c
++ *
++ * Copyright (C) 1995 Linus Torvalds
++ *
++ * Pentium III FXSR, SSE support
++ * Gareth Hughes <gareth@valinux.com>, May 2000
++ *
++ * X86-64 port
++ * Andi Kleen.
++ *
++ * CPU hotplug support - ashok.raj@intel.com
++ *
++ * Jun Nakajima <jun.nakajima@intel.com>
++ * Modified for Xen
++ */
++
++/*
++ * This file handles the architecture-dependent parts of process handling..
++ */
++
++#include <stdarg.h>
++
++#include <linux/cpu.h>
++#include <linux/errno.h>
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <linux/elfcore.h>
++#include <linux/smp.h>
++#include <linux/slab.h>
++#include <linux/user.h>
++#include <linux/module.h>
++#include <linux/a.out.h>
++#include <linux/interrupt.h>
++#include <linux/delay.h>
++#include <linux/ptrace.h>
++#include <linux/utsname.h>
++#include <linux/random.h>
++#include <linux/notifier.h>
++#include <linux/kprobes.h>
++
++#include <asm/uaccess.h>
++#include <asm/pgtable.h>
++#include <asm/system.h>
++#include <asm/io.h>
++#include <asm/processor.h>
++#include <asm/i387.h>
++#include <asm/mmu_context.h>
++#include <asm/pda.h>
++#include <asm/prctl.h>
++#include <asm/kdebug.h>
++#include <xen/interface/platform.h>
++#include <xen/interface/physdev.h>
++#include <xen/interface/vcpu.h>
++#include <asm/desc.h>
++#include <asm/proto.h>
++#include <asm/hardirq.h>
++#include <asm/ia32.h>
++#include <asm/idle.h>
++
++#include <xen/cpu_hotplug.h>
++
++asmlinkage extern void ret_from_fork(void);
++
++unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED;
++
++unsigned long boot_option_idle_override = 0;
++EXPORT_SYMBOL(boot_option_idle_override);
++
++/*
++ * Powermanagement idle function, if any..
++ */
++void (*pm_idle)(void);
++EXPORT_SYMBOL(pm_idle);
++static DEFINE_PER_CPU(unsigned int, cpu_idle_state);
++
++static ATOMIC_NOTIFIER_HEAD(idle_notifier);
++
++void idle_notifier_register(struct notifier_block *n)
++{
++ atomic_notifier_chain_register(&idle_notifier, n);
++}
++EXPORT_SYMBOL_GPL(idle_notifier_register);
++
++void idle_notifier_unregister(struct notifier_block *n)
++{
++ atomic_notifier_chain_unregister(&idle_notifier, n);
++}
++EXPORT_SYMBOL(idle_notifier_unregister);
++
++enum idle_state { CPU_IDLE, CPU_NOT_IDLE };
++static DEFINE_PER_CPU(enum idle_state, idle_state) = CPU_NOT_IDLE;
++
++void enter_idle(void)
++{
++ __get_cpu_var(idle_state) = CPU_IDLE;
++ atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
++}
++
++static void __exit_idle(void)
++{
++ __get_cpu_var(idle_state) = CPU_NOT_IDLE;
++ atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
++}
++
++/* Called from interrupts to signify idle end */
++void exit_idle(void)
++{
++ if (current->pid | read_pda(irqcount))
++ return;
++ __exit_idle();
++}
++
++/*
++ * On SMP it's slightly faster (but much more power-consuming!)
++ * to poll the ->need_resched flag instead of waiting for the
++ * cross-CPU IPI to arrive. Use this option with caution.
++ */
++static void poll_idle (void)
++{
++ local_irq_enable();
++
++ asm volatile(
++ "2:"
++ "testl %0,%1;"
++ "rep; nop;"
++ "je 2b;"
++ : :
++ "i" (_TIF_NEED_RESCHED),
++ "m" (current_thread_info()->flags));
++}
++
++static void xen_idle(void)
++{
++ local_irq_disable();
++
++ if (need_resched())
++ local_irq_enable();
++ else {
++ current_thread_info()->status &= ~TS_POLLING;
++ smp_mb__after_clear_bit();
++ safe_halt();
++ current_thread_info()->status |= TS_POLLING;
++ }
++}
++
++#ifdef CONFIG_HOTPLUG_CPU
++static inline void play_dead(void)
++{
++ idle_task_exit();
++ local_irq_disable();
++ cpu_clear(smp_processor_id(), cpu_initialized);
++ preempt_enable_no_resched();
++ VOID(HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL));
++ cpu_bringup();
++}
++#else
++static inline void play_dead(void)
++{
++ BUG();
++}
++#endif /* CONFIG_HOTPLUG_CPU */
++
++/*
++ * The idle thread. There's no useful work to be
++ * done, so just try to conserve power and have a
++ * low exit latency (ie sit in a loop waiting for
++ * somebody to say that they'd like to reschedule)
++ */
++void cpu_idle (void)
++{
++ current_thread_info()->status |= TS_POLLING;
++ /* endless idle loop with no priority at all */
++ while (1) {
++ while (!need_resched()) {
++ void (*idle)(void);
++
++ if (__get_cpu_var(cpu_idle_state))
++ __get_cpu_var(cpu_idle_state) = 0;
++ rmb();
++ idle = xen_idle; /* no alternatives */
++ if (cpu_is_offline(smp_processor_id()))
++ play_dead();
++ enter_idle();
++ idle();
++ __exit_idle();
++ }
++
++ preempt_enable_no_resched();
++ schedule();
++ preempt_disable();
++ }
++}
++
++void cpu_idle_wait(void)
++{
++ unsigned int cpu, this_cpu = get_cpu();
++ cpumask_t map;
++
++ set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
++ put_cpu();
++
++ cpus_clear(map);
++ for_each_online_cpu(cpu) {
++ per_cpu(cpu_idle_state, cpu) = 1;
++ cpu_set(cpu, map);
++ }
++
++ __get_cpu_var(cpu_idle_state) = 0;
++
++ wmb();
++ do {
++ ssleep(1);
++ for_each_online_cpu(cpu) {
++ if (cpu_isset(cpu, map) &&
++ !per_cpu(cpu_idle_state, cpu))
++ cpu_clear(cpu, map);
++ }
++ cpus_and(map, map, cpu_online_map);
++ } while (!cpus_empty(map));
++}
++EXPORT_SYMBOL_GPL(cpu_idle_wait);
++
++void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
++{
++}
++
++static int __init idle_setup (char *str)
++{
++ if (!strncmp(str, "poll", 4)) {
++ printk("using polling idle threads.\n");
++ pm_idle = poll_idle;
++ }
++
++ boot_option_idle_override = 1;
++ return 1;
++}
++
++__setup("idle=", idle_setup);
++
++/* Prints also some state that isn't saved in the pt_regs */
++void __show_regs(struct pt_regs * regs)
++{
++ unsigned long fs, gs, shadowgs;
++ unsigned int fsindex,gsindex;
++ unsigned int ds,cs,es;
++
++ printk("\n");
++ print_modules();
++ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
++ current->pid, current->comm, print_tainted(),
++ system_utsname.release,
++ (int)strcspn(system_utsname.version, " "),
++ system_utsname.version);
++ printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
++ printk_address(regs->rip);
++ printk("RSP: %04lx:%016lx EFLAGS: %08lx\n", regs->ss, regs->rsp,
++ regs->eflags);
++ printk("RAX: %016lx RBX: %016lx RCX: %016lx\n",
++ regs->rax, regs->rbx, regs->rcx);
++ printk("RDX: %016lx RSI: %016lx RDI: %016lx\n",
++ regs->rdx, regs->rsi, regs->rdi);
++ printk("RBP: %016lx R08: %016lx R09: %016lx\n",
++ regs->rbp, regs->r8, regs->r9);
++ printk("R10: %016lx R11: %016lx R12: %016lx\n",
++ regs->r10, regs->r11, regs->r12);
++ printk("R13: %016lx R14: %016lx R15: %016lx\n",
++ regs->r13, regs->r14, regs->r15);
++
++ asm("mov %%ds,%0" : "=r" (ds));
++ asm("mov %%cs,%0" : "=r" (cs));
++ asm("mov %%es,%0" : "=r" (es));
++ asm("mov %%fs,%0" : "=r" (fsindex));
++ asm("mov %%gs,%0" : "=r" (gsindex));
++
++ rdmsrl(MSR_FS_BASE, fs);
++ rdmsrl(MSR_GS_BASE, gs);
++ rdmsrl(MSR_KERNEL_GS_BASE, shadowgs);
++
++ printk("FS: %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n",
++ fs,fsindex,gs,gsindex,shadowgs);
++ printk("CS: %04x DS: %04x ES: %04x\n", cs, ds, es);
++
++}
++
++void show_regs(struct pt_regs *regs)
++{
++ printk("CPU %d:", smp_processor_id());
++ __show_regs(regs);
++ show_trace(NULL, regs, (void *)(regs + 1));
++}
++
++/*
++ * Free current thread data structures etc..
++ */
++void exit_thread(void)
++{
++ struct task_struct *me = current;
++ struct thread_struct *t = &me->thread;
++
++ if (me->thread.io_bitmap_ptr) {
++#ifndef CONFIG_X86_NO_TSS
++ struct tss_struct *tss = &per_cpu(init_tss, get_cpu());
++#endif
++#ifdef CONFIG_XEN
++ struct physdev_set_iobitmap iobmp_op;
++ memset(&iobmp_op, 0, sizeof(iobmp_op));
++#endif
++
++ kfree(t->io_bitmap_ptr);
++ t->io_bitmap_ptr = NULL;
++ /*
++ * Careful, clear this in the TSS too:
++ */
++#ifndef CONFIG_X86_NO_TSS
++ memset(tss->io_bitmap, 0xff, t->io_bitmap_max);
++ put_cpu();
++#endif
++#ifdef CONFIG_XEN
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap,
++ &iobmp_op));
++#endif
++ t->io_bitmap_max = 0;
++ }
++}
++
++void load_gs_index(unsigned gs)
++{
++ WARN_ON(HYPERVISOR_set_segment_base(SEGBASE_GS_USER_SEL, gs));
++}
++
++void flush_thread(void)
++{
++ struct task_struct *tsk = current;
++ struct thread_info *t = current_thread_info();
++
++ if (t->flags & _TIF_ABI_PENDING) {
++ t->flags ^= (_TIF_ABI_PENDING | _TIF_IA32);
++ if (t->flags & _TIF_IA32)
++ current_thread_info()->status |= TS_COMPAT;
++ }
++
++ tsk->thread.debugreg0 = 0;
++ tsk->thread.debugreg1 = 0;
++ tsk->thread.debugreg2 = 0;
++ tsk->thread.debugreg3 = 0;
++ tsk->thread.debugreg6 = 0;
++ tsk->thread.debugreg7 = 0;
++ memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
++ /*
++ * Forget coprocessor state..
++ */
++ clear_fpu(tsk);
++ clear_used_math();
++}
++
++void release_thread(struct task_struct *dead_task)
++{
++ if (dead_task->mm) {
++ if (dead_task->mm->context.size) {
++ printk("WARNING: dead process %8s still has LDT? <%p/%d>\n",
++ dead_task->comm,
++ dead_task->mm->context.ldt,
++ dead_task->mm->context.size);
++ BUG();
++ }
++ }
++}
++
++static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
++{
++ struct user_desc ud = {
++ .base_addr = addr,
++ .limit = 0xfffff,
++ .seg_32bit = 1,
++ .limit_in_pages = 1,
++ .useable = 1,
++ };
++ struct n_desc_struct *desc = (void *)t->thread.tls_array;
++ desc += tls;
++ desc->a = LDT_entry_a(&ud);
++ desc->b = LDT_entry_b(&ud);
++}
++
++static inline u32 read_32bit_tls(struct task_struct *t, int tls)
++{
++ struct desc_struct *desc = (void *)t->thread.tls_array;
++ desc += tls;
++ return desc->base0 |
++ (((u32)desc->base1) << 16) |
++ (((u32)desc->base2) << 24);
++}
++
++/*
++ * This gets called before we allocate a new thread and copy
++ * the current task into it.
++ */
++void prepare_to_copy(struct task_struct *tsk)
++{
++ unlazy_fpu(tsk);
++}
++
++int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp,
++ unsigned long unused,
++ struct task_struct * p, struct pt_regs * regs)
++{
++ int err;
++ struct pt_regs * childregs;
++ struct task_struct *me = current;
++
++ childregs = ((struct pt_regs *)
++ (THREAD_SIZE + task_stack_page(p))) - 1;
++ *childregs = *regs;
++
++ childregs->rax = 0;
++ childregs->rsp = rsp;
++ if (rsp == ~0UL)
++ childregs->rsp = (unsigned long)childregs;
++
++ p->thread.rsp = (unsigned long) childregs;
++ p->thread.rsp0 = (unsigned long) (childregs+1);
++ p->thread.userrsp = me->thread.userrsp;
++
++ set_tsk_thread_flag(p, TIF_FORK);
++
++ p->thread.fs = me->thread.fs;
++ p->thread.gs = me->thread.gs;
++
++ asm("mov %%gs,%0" : "=m" (p->thread.gsindex));
++ asm("mov %%fs,%0" : "=m" (p->thread.fsindex));
++ asm("mov %%es,%0" : "=m" (p->thread.es));
++ asm("mov %%ds,%0" : "=m" (p->thread.ds));
++
++ if (unlikely(me->thread.io_bitmap_ptr != NULL)) {
++ p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
++ if (!p->thread.io_bitmap_ptr) {
++ p->thread.io_bitmap_max = 0;
++ return -ENOMEM;
++ }
++ memcpy(p->thread.io_bitmap_ptr, me->thread.io_bitmap_ptr,
++ IO_BITMAP_BYTES);
++ }
++
++ /*
++ * Set a new TLS for the child thread?
++ */
++ if (clone_flags & CLONE_SETTLS) {
++#ifdef CONFIG_IA32_EMULATION
++ if (test_thread_flag(TIF_IA32))
++ err = ia32_child_tls(p, childregs);
++ else
++#endif
++ err = do_arch_prctl(p, ARCH_SET_FS, childregs->r8);
++ if (err)
++ goto out;
++ }
++ p->thread.iopl = current->thread.iopl;
++
++ err = 0;
++out:
++ if (err && p->thread.io_bitmap_ptr) {
++ kfree(p->thread.io_bitmap_ptr);
++ p->thread.io_bitmap_max = 0;
++ }
++ return err;
++}
++
++static inline void __save_init_fpu( struct task_struct *tsk )
++{
++ asm volatile( "rex64 ; fxsave %0 ; fnclex"
++ : "=m" (tsk->thread.i387.fxsave));
++ tsk->thread_info->status &= ~TS_USEDFPU;
++}
++
++/*
++ * switch_to(x,y) should switch tasks from x to y.
++ *
++ * This could still be optimized:
++ * - fold all the options into a flag word and test it with a single test.
++ * - could test fs/gs bitsliced
++ *
++ * Kprobes not supported here. Set the probe on schedule instead.
++ */
++__kprobes struct task_struct *
++__switch_to(struct task_struct *prev_p, struct task_struct *next_p)
++{
++ struct thread_struct *prev = &prev_p->thread,
++ *next = &next_p->thread;
++ int cpu = smp_processor_id();
++#ifndef CONFIG_X86_NO_TSS
++ struct tss_struct *tss = &per_cpu(init_tss, cpu);
++#endif
++#if CONFIG_XEN_COMPAT > 0x030002
++ struct physdev_set_iopl iopl_op;
++ struct physdev_set_iobitmap iobmp_op;
++#else
++ struct physdev_op _pdo[2], *pdo = _pdo;
++#define iopl_op pdo->u.set_iopl
++#define iobmp_op pdo->u.set_iobitmap
++#endif
++ multicall_entry_t _mcl[8], *mcl = _mcl;
++
++ /*
++ * This is basically '__unlazy_fpu', except that we queue a
++ * multicall to indicate FPU task switch, rather than
++ * synchronously trapping to Xen.
++ * The AMD workaround requires it to be after DS reload, or
++ * after DS has been cleared, which we do in __prepare_arch_switch.
++ */
++ if (prev_p->thread_info->status & TS_USEDFPU) {
++ __save_init_fpu(prev_p); /* _not_ save_init_fpu() */
++ mcl->op = __HYPERVISOR_fpu_taskswitch;
++ mcl->args[0] = 1;
++ mcl++;
++ }
++
++ /*
++ * Reload esp0, LDT and the page table pointer:
++ */
++ mcl->op = __HYPERVISOR_stack_switch;
++ mcl->args[0] = __KERNEL_DS;
++ mcl->args[1] = next->rsp0;
++ mcl++;
++
++ /*
++ * Load the per-thread Thread-Local Storage descriptor.
++ * This is load_TLS(next, cpu) with multicalls.
++ */
++#define C(i) do { \
++ if (unlikely(next->tls_array[i] != prev->tls_array[i])) { \
++ mcl->op = __HYPERVISOR_update_descriptor; \
++ mcl->args[0] = virt_to_machine( \
++ &cpu_gdt(cpu)[GDT_ENTRY_TLS_MIN + i]); \
++ mcl->args[1] = next->tls_array[i]; \
++ mcl++; \
++ } \
++} while (0)
++ C(0); C(1); C(2);
++#undef C
++
++ if (unlikely(prev->iopl != next->iopl)) {
++ iopl_op.iopl = (next->iopl == 0) ? 1 : next->iopl;
++#if CONFIG_XEN_COMPAT > 0x030002
++ mcl->op = __HYPERVISOR_physdev_op;
++ mcl->args[0] = PHYSDEVOP_set_iopl;
++ mcl->args[1] = (unsigned long)&iopl_op;
++#else
++ mcl->op = __HYPERVISOR_physdev_op_compat;
++ pdo->cmd = PHYSDEVOP_set_iopl;
++ mcl->args[0] = (unsigned long)pdo++;
++#endif
++ mcl++;
++ }
++
++ if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr)) {
++ set_xen_guest_handle(iobmp_op.bitmap,
++ (char *)next->io_bitmap_ptr);
++ iobmp_op.nr_ports = next->io_bitmap_ptr ? IO_BITMAP_BITS : 0;
++#if CONFIG_XEN_COMPAT > 0x030002
++ mcl->op = __HYPERVISOR_physdev_op;
++ mcl->args[0] = PHYSDEVOP_set_iobitmap;
++ mcl->args[1] = (unsigned long)&iobmp_op;
++#else
++ mcl->op = __HYPERVISOR_physdev_op_compat;
++ pdo->cmd = PHYSDEVOP_set_iobitmap;
++ mcl->args[0] = (unsigned long)pdo++;
++#endif
++ mcl++;
++ }
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ BUG_ON(pdo > _pdo + ARRAY_SIZE(_pdo));
++#endif
++ BUG_ON(mcl > _mcl + ARRAY_SIZE(_mcl));
++ if (unlikely(HYPERVISOR_multicall_check(_mcl, mcl - _mcl, NULL)))
++ BUG();
++
++ /*
++ * Switch DS and ES.
++ * This won't pick up thread selector changes, but I guess that is ok.
++ */
++ if (unlikely(next->es))
++ loadsegment(es, next->es);
++
++ if (unlikely(next->ds))
++ loadsegment(ds, next->ds);
++
++ /*
++ * Switch FS and GS.
++ */
++ if (unlikely(next->fsindex))
++ loadsegment(fs, next->fsindex);
++
++ if (next->fs)
++ WARN_ON(HYPERVISOR_set_segment_base(SEGBASE_FS, next->fs));
++
++ if (unlikely(next->gsindex))
++ load_gs_index(next->gsindex);
++
++ if (next->gs)
++ WARN_ON(HYPERVISOR_set_segment_base(SEGBASE_GS_USER, next->gs));
++
++ /*
++ * Switch the PDA context.
++ */
++ prev->userrsp = read_pda(oldrsp);
++ write_pda(oldrsp, next->userrsp);
++ write_pda(pcurrent, next_p);
++ write_pda(kernelstack,
++ task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET);
++
++ /*
++ * Now maybe reload the debug registers
++ */
++ if (unlikely(next->debugreg7)) {
++ set_debugreg(next->debugreg0, 0);
++ set_debugreg(next->debugreg1, 1);
++ set_debugreg(next->debugreg2, 2);
++ set_debugreg(next->debugreg3, 3);
++ /* no 4 and 5 */
++ set_debugreg(next->debugreg6, 6);
++ set_debugreg(next->debugreg7, 7);
++ }
++
++ return prev_p;
++}
++
++/*
++ * sys_execve() executes a new program.
++ */
++asmlinkage
++long sys_execve(char __user *name, char __user * __user *argv,
++ char __user * __user *envp, struct pt_regs regs)
++{
++ long error;
++ char * filename;
++
++ filename = getname(name);
++ error = PTR_ERR(filename);
++ if (IS_ERR(filename))
++ return error;
++ error = do_execve(filename, argv, envp, ®s);
++ if (error == 0) {
++ task_lock(current);
++ current->ptrace &= ~PT_DTRACE;
++ task_unlock(current);
++ }
++ putname(filename);
++ return error;
++}
++
++void set_personality_64bit(void)
++{
++ /* inherit personality from parent */
++
++ /* Make sure to be in 64bit mode */
++ clear_thread_flag(TIF_IA32);
++
++ /* TBD: overwrites user setup. Should have two bits.
++ But 64bit processes have always behaved this way,
++ so it's not too bad. The main problem is just that
++ 32bit childs are affected again. */
++ current->personality &= ~READ_IMPLIES_EXEC;
++}
++
++asmlinkage long sys_fork(struct pt_regs *regs)
++{
++ return do_fork(SIGCHLD, regs->rsp, regs, 0, NULL, NULL);
++}
++
++asmlinkage long
++sys_clone(unsigned long clone_flags, unsigned long newsp,
++ void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
++{
++ if (!newsp)
++ newsp = regs->rsp;
++ return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
++}
++
++/*
++ * This is trivial, and on the face of it looks like it
++ * could equally well be done in user mode.
++ *
++ * Not so, for quite unobvious reasons - register pressure.
++ * In user mode vfork() cannot have a stack frame, and if
++ * done by calling the "clone()" system call directly, you
++ * do not have enough call-clobbered registers to hold all
++ * the information you need.
++ */
++asmlinkage long sys_vfork(struct pt_regs *regs)
++{
++ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->rsp, regs, 0,
++ NULL, NULL);
++}
++
++unsigned long get_wchan(struct task_struct *p)
++{
++ unsigned long stack;
++ u64 fp,rip;
++ int count = 0;
++
++ if (!p || p == current || p->state==TASK_RUNNING)
++ return 0;
++ stack = (unsigned long)task_stack_page(p);
++ if (p->thread.rsp < stack || p->thread.rsp > stack+THREAD_SIZE)
++ return 0;
++ fp = *(u64 *)(p->thread.rsp);
++ do {
++ if (fp < (unsigned long)stack ||
++ fp > (unsigned long)stack+THREAD_SIZE)
++ return 0;
++ rip = *(u64 *)(fp+8);
++ if (!in_sched_functions(rip))
++ return rip;
++ fp = *(u64 *)fp;
++ } while (count++ < 16);
++ return 0;
++}
++
++long do_arch_prctl(struct task_struct *task, int code, unsigned long addr)
++{
++ int ret = 0;
++ int doit = task == current;
++ int cpu;
++
++ switch (code) {
++ case ARCH_SET_GS:
++ if (addr >= TASK_SIZE_OF(task))
++ return -EPERM;
++ cpu = get_cpu();
++ /* handle small bases via the GDT because that's faster to
++ switch. */
++ if (addr <= 0xffffffff) {
++ set_32bit_tls(task, GS_TLS, addr);
++ if (doit) {
++ load_TLS(&task->thread, cpu);
++ load_gs_index(GS_TLS_SEL);
++ }
++ task->thread.gsindex = GS_TLS_SEL;
++ task->thread.gs = 0;
++ } else {
++ task->thread.gsindex = 0;
++ task->thread.gs = addr;
++ if (doit) {
++ load_gs_index(0);
++ ret = HYPERVISOR_set_segment_base(
++ SEGBASE_GS_USER, addr);
++ }
++ }
++ put_cpu();
++ break;
++ case ARCH_SET_FS:
++ /* Not strictly needed for fs, but do it for symmetry
++ with gs */
++ if (addr >= TASK_SIZE_OF(task))
++ return -EPERM;
++ cpu = get_cpu();
++ /* handle small bases via the GDT because that's faster to
++ switch. */
++ if (addr <= 0xffffffff) {
++ set_32bit_tls(task, FS_TLS, addr);
++ if (doit) {
++ load_TLS(&task->thread, cpu);
++ asm volatile("movl %0,%%fs" :: "r"(FS_TLS_SEL));
++ }
++ task->thread.fsindex = FS_TLS_SEL;
++ task->thread.fs = 0;
++ } else {
++ task->thread.fsindex = 0;
++ task->thread.fs = addr;
++ if (doit) {
++ /* set the selector to 0 to not confuse
++ __switch_to */
++ asm volatile("movl %0,%%fs" :: "r" (0));
++ ret = HYPERVISOR_set_segment_base(SEGBASE_FS,
++ addr);
++ }
++ }
++ put_cpu();
++ break;
++ case ARCH_GET_FS: {
++ unsigned long base;
++ if (task->thread.fsindex == FS_TLS_SEL)
++ base = read_32bit_tls(task, FS_TLS);
++ else if (doit)
++ rdmsrl(MSR_FS_BASE, base);
++ else
++ base = task->thread.fs;
++ ret = put_user(base, (unsigned long __user *)addr);
++ break;
++ }
++ case ARCH_GET_GS: {
++ unsigned long base;
++ unsigned gsindex;
++ if (task->thread.gsindex == GS_TLS_SEL)
++ base = read_32bit_tls(task, GS_TLS);
++ else if (doit) {
++ asm("movl %%gs,%0" : "=r" (gsindex));
++ if (gsindex)
++ rdmsrl(MSR_KERNEL_GS_BASE, base);
++ else
++ base = task->thread.gs;
++ }
++ else
++ base = task->thread.gs;
++ ret = put_user(base, (unsigned long __user *)addr);
++ break;
++ }
++
++ default:
++ ret = -EINVAL;
++ break;
++ }
++
++ return ret;
++}
++
++long sys_arch_prctl(int code, unsigned long addr)
++{
++ return do_arch_prctl(current, code, addr);
++}
++
++/*
++ * Capture the user space registers if the task is not running (in user space)
++ */
++int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
++{
++ struct pt_regs *pp, ptregs;
++
++ pp = task_pt_regs(tsk);
++
++ ptregs = *pp;
++ ptregs.cs &= 0xffff;
++ ptregs.ss &= 0xffff;
++
++ elf_core_copy_regs(regs, &ptregs);
++
++ boot_option_idle_override = 1;
++ return 1;
++}
++
++unsigned long arch_align_stack(unsigned long sp)
++{
++ if (randomize_va_space)
++ sp -= get_random_int() % 8192;
++ return sp & ~0xf;
++}
+Index: head-2008-11-25/arch/x86/kernel/setup_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/setup_64-xen.c 2008-04-22 15:41:51.000000000 +0200
+@@ -0,0 +1,1652 @@
++/*
++ * linux/arch/x86-64/kernel/setup.c
++ *
++ * Copyright (C) 1995 Linus Torvalds
++ *
++ * Nov 2001 Dave Jones <davej@suse.de>
++ * Forked from i386 setup code.
++ */
++
++/*
++ * This file handles the architecture-dependent parts of initialization
++ */
++
++#include <linux/errno.h>
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <linux/stddef.h>
++#include <linux/unistd.h>
++#include <linux/ptrace.h>
++#include <linux/slab.h>
++#include <linux/user.h>
++#include <linux/a.out.h>
++#include <linux/screen_info.h>
++#include <linux/ioport.h>
++#include <linux/delay.h>
++#include <linux/init.h>
++#include <linux/initrd.h>
++#include <linux/highmem.h>
++#include <linux/bootmem.h>
++#include <linux/module.h>
++#include <asm/processor.h>
++#include <linux/console.h>
++#include <linux/seq_file.h>
++#include <linux/crash_dump.h>
++#include <linux/root_dev.h>
++#include <linux/pci.h>
++#include <linux/acpi.h>
++#include <linux/kallsyms.h>
++#include <linux/edd.h>
++#include <linux/mmzone.h>
++#include <linux/kexec.h>
++#include <linux/cpufreq.h>
++#include <linux/dmi.h>
++#include <linux/dma-mapping.h>
++#include <linux/ctype.h>
++
++#include <asm/mtrr.h>
++#include <asm/uaccess.h>
++#include <asm/system.h>
++#include <asm/io.h>
++#include <asm/smp.h>
++#include <asm/msr.h>
++#include <asm/desc.h>
++#include <video/edid.h>
++#include <asm/e820.h>
++#include <asm/dma.h>
++#include <asm/mpspec.h>
++#include <asm/mmu_context.h>
++#include <asm/bootsetup.h>
++#include <asm/proto.h>
++#include <asm/setup.h>
++#include <asm/mach_apic.h>
++#include <asm/numa.h>
++#include <asm/sections.h>
++#include <asm/dmi.h>
++#ifdef CONFIG_XEN
++#include <linux/percpu.h>
++#include <xen/interface/physdev.h>
++#include "setup_arch_pre.h"
++#include <asm/hypervisor.h>
++#include <xen/interface/nmi.h>
++#include <xen/features.h>
++#include <xen/firmware.h>
++#include <xen/xencons.h>
++#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
++#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
++#include <asm/mach-xen/setup_arch_post.h>
++#include <xen/interface/memory.h>
++
++#ifdef CONFIG_XEN
++#include <xen/interface/kexec.h>
++#endif
++
++extern unsigned long start_pfn;
++extern struct edid_info edid_info;
++
++shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
++EXPORT_SYMBOL(HYPERVISOR_shared_info);
++
++extern char hypercall_page[PAGE_SIZE];
++EXPORT_SYMBOL(hypercall_page);
++
++static int xen_panic_event(struct notifier_block *, unsigned long, void *);
++static struct notifier_block xen_panic_block = {
++ xen_panic_event, NULL, 0 /* try to go last */
++};
++
++unsigned long *phys_to_machine_mapping;
++unsigned long *pfn_to_mfn_frame_list_list, *pfn_to_mfn_frame_list[512];
++
++EXPORT_SYMBOL(phys_to_machine_mapping);
++
++DEFINE_PER_CPU(multicall_entry_t, multicall_list[8]);
++DEFINE_PER_CPU(int, nr_multicall_ents);
++
++/* Raw start-of-day parameters from the hypervisor. */
++start_info_t *xen_start_info;
++EXPORT_SYMBOL(xen_start_info);
++#endif
++
++/*
++ * Machine setup..
++ */
++
++struct cpuinfo_x86 boot_cpu_data __read_mostly;
++EXPORT_SYMBOL(boot_cpu_data);
++
++unsigned long mmu_cr4_features;
++
++int acpi_disabled;
++EXPORT_SYMBOL(acpi_disabled);
++#ifdef CONFIG_ACPI
++extern int __initdata acpi_ht;
++extern acpi_interrupt_flags acpi_sci_flags;
++int __initdata acpi_force = 0;
++#endif
++
++int acpi_numa __initdata;
++
++/* Boot loader ID as an integer, for the benefit of proc_dointvec */
++int bootloader_type;
++
++unsigned long saved_video_mode;
++
++/*
++ * Early DMI memory
++ */
++int dmi_alloc_index;
++char dmi_alloc_data[DMI_MAX_DATA];
++
++/*
++ * Setup options
++ */
++struct screen_info screen_info;
++EXPORT_SYMBOL(screen_info);
++struct sys_desc_table_struct {
++ unsigned short length;
++ unsigned char table[0];
++};
++
++struct edid_info edid_info;
++EXPORT_SYMBOL_GPL(edid_info);
++struct e820map e820;
++#ifdef CONFIG_XEN
++struct e820map machine_e820;
++#endif
++
++extern int root_mountflags;
++
++char command_line[COMMAND_LINE_SIZE];
++
++struct resource standard_io_resources[] = {
++ { .name = "dma1", .start = 0x00, .end = 0x1f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "pic1", .start = 0x20, .end = 0x21,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "timer0", .start = 0x40, .end = 0x43,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "timer1", .start = 0x50, .end = 0x53,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "keyboard", .start = 0x60, .end = 0x6f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "dma page reg", .start = 0x80, .end = 0x8f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "pic2", .start = 0xa0, .end = 0xa1,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "dma2", .start = 0xc0, .end = 0xdf,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "fpu", .start = 0xf0, .end = 0xff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO }
++};
++
++#define STANDARD_IO_RESOURCES \
++ (sizeof standard_io_resources / sizeof standard_io_resources[0])
++
++#define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
++
++struct resource data_resource = {
++ .name = "Kernel data",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_RAM,
++};
++struct resource code_resource = {
++ .name = "Kernel code",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_RAM,
++};
++
++#define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
++
++static struct resource system_rom_resource = {
++ .name = "System ROM",
++ .start = 0xf0000,
++ .end = 0xfffff,
++ .flags = IORESOURCE_ROM,
++};
++
++static struct resource extension_rom_resource = {
++ .name = "Extension ROM",
++ .start = 0xe0000,
++ .end = 0xeffff,
++ .flags = IORESOURCE_ROM,
++};
++
++static struct resource adapter_rom_resources[] = {
++ { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
++ .flags = IORESOURCE_ROM },
++ { .name = "Adapter ROM", .start = 0, .end = 0,
++ .flags = IORESOURCE_ROM },
++ { .name = "Adapter ROM", .start = 0, .end = 0,
++ .flags = IORESOURCE_ROM },
++ { .name = "Adapter ROM", .start = 0, .end = 0,
++ .flags = IORESOURCE_ROM },
++ { .name = "Adapter ROM", .start = 0, .end = 0,
++ .flags = IORESOURCE_ROM },
++ { .name = "Adapter ROM", .start = 0, .end = 0,
++ .flags = IORESOURCE_ROM }
++};
++
++#define ADAPTER_ROM_RESOURCES \
++ (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
++
++static struct resource video_rom_resource = {
++ .name = "Video ROM",
++ .start = 0xc0000,
++ .end = 0xc7fff,
++ .flags = IORESOURCE_ROM,
++};
++
++static struct resource video_ram_resource = {
++ .name = "Video RAM area",
++ .start = 0xa0000,
++ .end = 0xbffff,
++ .flags = IORESOURCE_RAM,
++};
++
++#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
++
++static int __init romchecksum(unsigned char *rom, unsigned long length)
++{
++ unsigned char *p, sum = 0;
++
++ for (p = rom; p < rom + length; p++)
++ sum += *p;
++ return sum == 0;
++}
++
++static void __init probe_roms(void)
++{
++ unsigned long start, length, upper;
++ unsigned char *rom;
++ int i;
++
++#ifdef CONFIG_XEN
++ /* Nothing to do if not running in dom0. */
++ if (!is_initial_xendomain())
++ return;
++#endif
++
++ /* video rom */
++ upper = adapter_rom_resources[0].start;
++ for (start = video_rom_resource.start; start < upper; start += 2048) {
++ rom = isa_bus_to_virt(start);
++ if (!romsignature(rom))
++ continue;
++
++ video_rom_resource.start = start;
++
++ /* 0 < length <= 0x7f * 512, historically */
++ length = rom[2] * 512;
++
++ /* if checksum okay, trust length byte */
++ if (length && romchecksum(rom, length))
++ video_rom_resource.end = start + length - 1;
++
++ request_resource(&iomem_resource, &video_rom_resource);
++ break;
++ }
++
++ start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
++ if (start < upper)
++ start = upper;
++
++ /* system rom */
++ request_resource(&iomem_resource, &system_rom_resource);
++ upper = system_rom_resource.start;
++
++ /* check for extension rom (ignore length byte!) */
++ rom = isa_bus_to_virt(extension_rom_resource.start);
++ if (romsignature(rom)) {
++ length = extension_rom_resource.end - extension_rom_resource.start + 1;
++ if (romchecksum(rom, length)) {
++ request_resource(&iomem_resource, &extension_rom_resource);
++ upper = extension_rom_resource.start;
++ }
++ }
++
++ /* check for adapter roms on 2k boundaries */
++ for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
++ rom = isa_bus_to_virt(start);
++ if (!romsignature(rom))
++ continue;
++
++ /* 0 < length <= 0x7f * 512, historically */
++ length = rom[2] * 512;
++
++ /* but accept any length that fits if checksum okay */
++ if (!length || start + length > upper || !romchecksum(rom, length))
++ continue;
++
++ adapter_rom_resources[i].start = start;
++ adapter_rom_resources[i].end = start + length - 1;
++ request_resource(&iomem_resource, &adapter_rom_resources[i]);
++
++ start = adapter_rom_resources[i++].end & ~2047UL;
++ }
++}
++
++/* Check for full argument with no trailing characters */
++static int fullarg(char *p, char *arg)
++{
++ int l = strlen(arg);
++ return !memcmp(p, arg, l) && (p[l] == 0 || isspace(p[l]));
++}
++
++static __init void parse_cmdline_early (char ** cmdline_p)
++{
++ char c = ' ', *to = command_line, *from = COMMAND_LINE;
++ int len = 0;
++ int userdef = 0;
++
++ for (;;) {
++ if (c != ' ')
++ goto next_char;
++
++#ifdef CONFIG_SMP
++ /*
++ * If the BIOS enumerates physical processors before logical,
++ * maxcpus=N at enumeration-time can be used to disable HT.
++ */
++ else if (!memcmp(from, "maxcpus=", 8)) {
++ extern unsigned int maxcpus;
++
++ maxcpus = simple_strtoul(from + 8, NULL, 0);
++ }
++#endif
++#ifdef CONFIG_ACPI
++ /* "acpi=off" disables both ACPI table parsing and interpreter init */
++ if (fullarg(from,"acpi=off"))
++ disable_acpi();
++
++ if (fullarg(from, "acpi=force")) {
++ /* add later when we do DMI horrors: */
++ acpi_force = 1;
++ acpi_disabled = 0;
++ }
++
++ /* acpi=ht just means: do ACPI MADT parsing
++ at bootup, but don't enable the full ACPI interpreter */
++ if (fullarg(from, "acpi=ht")) {
++ if (!acpi_force)
++ disable_acpi();
++ acpi_ht = 1;
++ }
++ else if (fullarg(from, "pci=noacpi"))
++ acpi_disable_pci();
++ else if (fullarg(from, "acpi=noirq"))
++ acpi_noirq_set();
++
++ else if (fullarg(from, "acpi_sci=edge"))
++ acpi_sci_flags.trigger = 1;
++ else if (fullarg(from, "acpi_sci=level"))
++ acpi_sci_flags.trigger = 3;
++ else if (fullarg(from, "acpi_sci=high"))
++ acpi_sci_flags.polarity = 1;
++ else if (fullarg(from, "acpi_sci=low"))
++ acpi_sci_flags.polarity = 3;
++
++ /* acpi=strict disables out-of-spec workarounds */
++ else if (fullarg(from, "acpi=strict")) {
++ acpi_strict = 1;
++ }
++#ifdef CONFIG_X86_IO_APIC
++ else if (fullarg(from, "acpi_skip_timer_override"))
++ acpi_skip_timer_override = 1;
++#endif
++#endif
++
++#ifndef CONFIG_XEN
++ if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) {
++ clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
++ disable_apic = 1;
++ }
++
++ if (fullarg(from, "noapic"))
++ skip_ioapic_setup = 1;
++
++ if (fullarg(from,"apic")) {
++ skip_ioapic_setup = 0;
++ ioapic_force = 1;
++ }
++#endif
++
++ if (!memcmp(from, "mem=", 4))
++ parse_memopt(from+4, &from);
++
++ if (!memcmp(from, "memmap=", 7)) {
++ /* exactmap option is for used defined memory */
++ if (!memcmp(from+7, "exactmap", 8)) {
++#ifdef CONFIG_CRASH_DUMP
++ /* If we are doing a crash dump, we
++ * still need to know the real mem
++ * size before original memory map is
++ * reset.
++ */
++ saved_max_pfn = e820_end_of_ram();
++#endif
++ from += 8+7;
++ end_pfn_map = 0;
++ e820.nr_map = 0;
++ userdef = 1;
++ }
++ else {
++ parse_memmapopt(from+7, &from);
++ userdef = 1;
++ }
++ }
++
++#ifdef CONFIG_NUMA
++ if (!memcmp(from, "numa=", 5))
++ numa_setup(from+5);
++#endif
++
++ if (!memcmp(from,"iommu=",6)) {
++ iommu_setup(from+6);
++ }
++
++ if (fullarg(from,"oops=panic"))
++ panic_on_oops = 1;
++
++ if (!memcmp(from, "noexec=", 7))
++ nonx_setup(from + 7);
++
++#ifdef CONFIG_KEXEC
++ /* crashkernel=size@addr specifies the location to reserve for
++ * a crash kernel. By reserving this memory we guarantee
++ * that linux never set's it up as a DMA target.
++ * Useful for holding code to do something appropriate
++ * after a kernel panic.
++ */
++ else if (!memcmp(from, "crashkernel=", 12)) {
++#ifndef CONFIG_XEN
++ unsigned long size, base;
++ size = memparse(from+12, &from);
++ if (*from == '@') {
++ base = memparse(from+1, &from);
++ /* FIXME: Do I want a sanity check
++ * to validate the memory range?
++ */
++ crashk_res.start = base;
++ crashk_res.end = base + size - 1;
++ }
++#else
++ printk("Ignoring crashkernel command line, "
++ "parameter will be supplied by xen\n");
++#endif
++ }
++#endif
++
++#ifdef CONFIG_PROC_VMCORE
++ /* elfcorehdr= specifies the location of elf core header
++ * stored by the crashed kernel. This option will be passed
++ * by kexec loader to the capture kernel.
++ */
++ else if(!memcmp(from, "elfcorehdr=", 11))
++ elfcorehdr_addr = memparse(from+11, &from);
++#endif
++
++#if defined(CONFIG_HOTPLUG_CPU) && !defined(CONFIG_XEN)
++ else if (!memcmp(from, "additional_cpus=", 16))
++ setup_additional_cpus(from+16);
++#endif
++
++ next_char:
++ c = *(from++);
++ if (!c)
++ break;
++ if (COMMAND_LINE_SIZE <= ++len)
++ break;
++ *(to++) = c;
++ }
++ if (userdef) {
++ printk(KERN_INFO "user-defined physical RAM map:\n");
++ e820_print_map("user");
++ }
++ *to = '\0';
++ *cmdline_p = command_line;
++}
++
++#ifndef CONFIG_NUMA
++static void __init
++contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
++{
++ unsigned long bootmap_size, bootmap;
++
++ bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
++ bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
++ if (bootmap == -1L)
++ panic("Cannot find bootmem map of size %ld\n",bootmap_size);
++ bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
++#ifdef CONFIG_XEN
++ e820_bootmem_free(NODE_DATA(0), 0, xen_start_info->nr_pages<<PAGE_SHIFT);
++#else
++ e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
++#endif
++ reserve_bootmem(bootmap, bootmap_size);
++}
++#endif
++
++#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
++struct edd edd;
++#ifdef CONFIG_EDD_MODULE
++EXPORT_SYMBOL(edd);
++#endif
++#ifndef CONFIG_XEN
++/**
++ * copy_edd() - Copy the BIOS EDD information
++ * from boot_params into a safe place.
++ *
++ */
++static inline void copy_edd(void)
++{
++ memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
++ memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
++ edd.mbr_signature_nr = EDD_MBR_SIG_NR;
++ edd.edd_info_nr = EDD_NR;
++}
++#endif
++#else
++static inline void copy_edd(void)
++{
++}
++#endif
++
++#ifndef CONFIG_XEN
++#define EBDA_ADDR_POINTER 0x40E
++
++unsigned __initdata ebda_addr;
++unsigned __initdata ebda_size;
++
++static void discover_ebda(void)
++{
++ /*
++ * there is a real-mode segmented pointer pointing to the
++ * 4K EBDA area at 0x40E
++ */
++ ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
++ ebda_addr <<= 4;
++
++ ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
++
++ /* Round EBDA up to pages */
++ if (ebda_size == 0)
++ ebda_size = 1;
++ ebda_size <<= 10;
++ ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
++ if (ebda_size > 64*1024)
++ ebda_size = 64*1024;
++}
++#else
++#define discover_ebda() ((void)0)
++#endif
++
++void __init setup_arch(char **cmdline_p)
++{
++#ifdef CONFIG_XEN
++ /* Register a call for panic conditions. */
++ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
++
++ ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
++ screen_info = SCREEN_INFO;
++
++ if (is_initial_xendomain()) {
++ const struct dom0_vga_console_info *info =
++ (void *)((char *)xen_start_info +
++ xen_start_info->console.dom0.info_off);
++
++ dom0_init_screen_info(info,
++ xen_start_info->console.dom0.info_size);
++ xen_start_info->console.domU.mfn = 0;
++ xen_start_info->console.domU.evtchn = 0;
++ } else
++ screen_info.orig_video_isVGA = 0;
++
++ copy_edid();
++
++ WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
++ VMASST_TYPE_writable_pagetables));
++
++ ARCH_SETUP
++#else
++ ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
++ screen_info = SCREEN_INFO;
++ edid_info = EDID_INFO;
++#endif /* !CONFIG_XEN */
++ saved_video_mode = SAVED_VIDEO_MODE;
++ bootloader_type = LOADER_TYPE;
++
++#ifdef CONFIG_BLK_DEV_RAM
++ rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
++ rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
++ rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
++#endif
++ setup_memory_region();
++ copy_edd();
++
++ if (!MOUNT_ROOT_RDONLY)
++ root_mountflags &= ~MS_RDONLY;
++ init_mm.start_code = (unsigned long) &_text;
++ init_mm.end_code = (unsigned long) &_etext;
++ init_mm.end_data = (unsigned long) &_edata;
++ init_mm.brk = (unsigned long) &_end;
++
++ code_resource.start = virt_to_phys(&_text);
++ code_resource.end = virt_to_phys(&_etext)-1;
++ data_resource.start = virt_to_phys(&_etext);
++ data_resource.end = virt_to_phys(&_edata)-1;
++
++ parse_cmdline_early(cmdline_p);
++
++ early_identify_cpu(&boot_cpu_data);
++
++ /*
++ * partially used pages are not usable - thus
++ * we are rounding upwards:
++ */
++ end_pfn = e820_end_of_ram();
++ num_physpages = end_pfn; /* for pfn_valid */
++
++ check_efer();
++
++ discover_ebda();
++
++ init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
++
++ if (is_initial_xendomain())
++ dmi_scan_machine();
++
++#ifdef CONFIG_ACPI_NUMA
++ /*
++ * Parse SRAT to discover nodes.
++ */
++ acpi_numa_init();
++#endif
++
++#ifdef CONFIG_NUMA
++ numa_initmem_init(0, end_pfn);
++#else
++ contig_initmem_init(0, end_pfn);
++#endif
++
++#ifdef CONFIG_XEN
++ /*
++ * Reserve kernel, physmap, start info, initial page tables, and
++ * direct mapping.
++ */
++ reserve_bootmem_generic(__pa_symbol(&_text),
++ (table_end << PAGE_SHIFT) - __pa_symbol(&_text));
++#else
++ /* Reserve direct mapping */
++ reserve_bootmem_generic(table_start << PAGE_SHIFT,
++ (table_end - table_start) << PAGE_SHIFT);
++
++ /* reserve kernel */
++ reserve_bootmem_generic(__pa_symbol(&_text),
++ __pa_symbol(&_end) - __pa_symbol(&_text));
++
++ /*
++ * reserve physical page 0 - it's a special BIOS page on many boxes,
++ * enabling clean reboots, SMP operation, laptop functions.
++ */
++ reserve_bootmem_generic(0, PAGE_SIZE);
++
++ /* reserve ebda region */
++ if (ebda_addr)
++ reserve_bootmem_generic(ebda_addr, ebda_size);
++
++#ifdef CONFIG_SMP
++ /*
++ * But first pinch a few for the stack/trampoline stuff
++ * FIXME: Don't need the extra page at 4K, but need to fix
++ * trampoline before removing it. (see the GDT stuff)
++ */
++ reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
++
++ /* Reserve SMP trampoline */
++ reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
++#endif
++#endif
++
++#ifdef CONFIG_ACPI_SLEEP
++ /*
++ * Reserve low memory region for sleep support.
++ */
++ acpi_reserve_bootmem();
++#endif
++#ifdef CONFIG_XEN
++#ifdef CONFIG_BLK_DEV_INITRD
++ if (xen_start_info->mod_start) {
++ if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
++ /*reserve_bootmem_generic(INITRD_START, INITRD_SIZE);*/
++ initrd_start = INITRD_START + PAGE_OFFSET;
++ initrd_end = initrd_start+INITRD_SIZE;
++ initrd_below_start_ok = 1;
++ } else {
++ printk(KERN_ERR "initrd extends beyond end of memory "
++ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
++ (unsigned long)(INITRD_START + INITRD_SIZE),
++ (unsigned long)(end_pfn << PAGE_SHIFT));
++ initrd_start = 0;
++ }
++ }
++#endif
++#else /* CONFIG_XEN */
++#ifdef CONFIG_BLK_DEV_INITRD
++ if (LOADER_TYPE && INITRD_START) {
++ if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
++ reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
++ initrd_start =
++ INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
++ initrd_end = initrd_start+INITRD_SIZE;
++ }
++ else {
++ printk(KERN_ERR "initrd extends beyond end of memory "
++ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
++ (unsigned long)(INITRD_START + INITRD_SIZE),
++ (unsigned long)(end_pfn << PAGE_SHIFT));
++ initrd_start = 0;
++ }
++ }
++#endif
++#endif /* !CONFIG_XEN */
++#ifdef CONFIG_KEXEC
++#ifdef CONFIG_XEN
++ xen_machine_kexec_setup_resources();
++#else
++ if (crashk_res.start != crashk_res.end) {
++ reserve_bootmem_generic(crashk_res.start,
++ crashk_res.end - crashk_res.start + 1);
++ }
++#endif
++#endif
++
++ paging_init();
++#ifdef CONFIG_X86_LOCAL_APIC
++ /*
++ * Find and reserve possible boot-time SMP configuration:
++ */
++ find_smp_config();
++#endif
++#ifdef CONFIG_XEN
++ {
++ int i, j, k, fpp;
++ unsigned long p2m_pages;
++
++ p2m_pages = end_pfn;
++ if (xen_start_info->nr_pages > end_pfn) {
++ /*
++ * the end_pfn was shrunk (probably by mem= or highmem=
++ * kernel parameter); shrink reservation with the HV
++ */
++ struct xen_memory_reservation reservation = {
++ .address_bits = 0,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ };
++ unsigned int difference;
++ int ret;
++
++ difference = xen_start_info->nr_pages - end_pfn;
++
++ set_xen_guest_handle(reservation.extent_start,
++ ((unsigned long *)xen_start_info->mfn_list) + end_pfn);
++ reservation.nr_extents = difference;
++ ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &reservation);
++ BUG_ON (ret != difference);
++ }
++ else if (end_pfn > xen_start_info->nr_pages)
++ p2m_pages = xen_start_info->nr_pages;
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ /* Make sure we have a large enough P->M table. */
++ phys_to_machine_mapping = alloc_bootmem_pages(
++ end_pfn * sizeof(unsigned long));
++ memset(phys_to_machine_mapping, ~0,
++ end_pfn * sizeof(unsigned long));
++ memcpy(phys_to_machine_mapping,
++ (unsigned long *)xen_start_info->mfn_list,
++ p2m_pages * sizeof(unsigned long));
++ free_bootmem(
++ __pa(xen_start_info->mfn_list),
++ PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
++ sizeof(unsigned long))));
++
++ /*
++ * Initialise the list of the frames that specify the
++ * list of frames that make up the p2m table. Used by
++ * save/restore.
++ */
++ pfn_to_mfn_frame_list_list = alloc_bootmem_pages(PAGE_SIZE);
++
++ fpp = PAGE_SIZE/sizeof(unsigned long);
++ for (i=0, j=0, k=-1; i< end_pfn; i+=fpp, j++) {
++ if ((j % fpp) == 0) {
++ k++;
++ BUG_ON(k>=fpp);
++ pfn_to_mfn_frame_list[k] =
++ alloc_bootmem_pages(PAGE_SIZE);
++ pfn_to_mfn_frame_list_list[k] =
++ virt_to_mfn(pfn_to_mfn_frame_list[k]);
++ j=0;
++ }
++ pfn_to_mfn_frame_list[k][j] =
++ virt_to_mfn(&phys_to_machine_mapping[i]);
++ }
++ HYPERVISOR_shared_info->arch.max_pfn = end_pfn;
++ HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
++ virt_to_mfn(pfn_to_mfn_frame_list_list);
++ }
++
++ /* Mark all ISA DMA channels in-use - using them wouldn't work. */
++ for (i = 0; i < MAX_DMA_CHANNELS; ++i)
++ if (i != 4 && request_dma(i, "xen") != 0)
++ BUG();
++ }
++
++ if (!is_initial_xendomain()) {
++ acpi_disabled = 1;
++#ifdef CONFIG_ACPI
++ acpi_ht = 0;
++#endif
++ }
++#endif
++
++#ifndef CONFIG_XEN
++ check_ioapic();
++#endif
++
++ zap_low_mappings(0);
++
++ /*
++ * set this early, so we dont allocate cpu0
++ * if MADT list doesnt list BSP first
++ * mpparse.c/MP_processor_info() allocates logical cpu numbers.
++ */
++ cpu_set(0, cpu_present_map);
++#ifdef CONFIG_ACPI
++ /*
++ * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
++ * Call this early for SRAT node setup.
++ */
++ acpi_boot_table_init();
++
++ /*
++ * Read APIC and some other early information from ACPI tables.
++ */
++ acpi_boot_init();
++#endif
++
++ init_cpu_to_node();
++
++#ifdef CONFIG_X86_LOCAL_APIC
++ /*
++ * get boot-time SMP configuration:
++ */
++ if (smp_found_config)
++ get_smp_config();
++#ifndef CONFIG_XEN
++ init_apic_mappings();
++#endif
++#endif
++#if defined(CONFIG_XEN) && defined(CONFIG_SMP) && !defined(CONFIG_HOTPLUG_CPU)
++ prefill_possible_map();
++#endif
++
++ /*
++ * Request address space for all standard RAM and ROM resources
++ * and also for regions reported as reserved by the e820.
++ */
++ probe_roms();
++#ifdef CONFIG_XEN
++ if (is_initial_xendomain())
++ e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
++#else
++ e820_reserve_resources(e820.map, e820.nr_map);
++#endif
++
++ request_resource(&iomem_resource, &video_ram_resource);
++
++ {
++ unsigned i;
++ /* request I/O space for devices used on all i[345]86 PCs */
++ for (i = 0; i < STANDARD_IO_RESOURCES; i++)
++ request_resource(&ioport_resource, &standard_io_resources[i]);
++ }
++
++#ifdef CONFIG_XEN
++ if (is_initial_xendomain())
++ e820_setup_gap(machine_e820.map, machine_e820.nr_map);
++#else
++ e820_setup_gap(e820.map, e820.nr_map);
++#endif
++
++#ifdef CONFIG_XEN
++ {
++ struct physdev_set_iopl set_iopl;
++
++ set_iopl.iopl = 1;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
++
++ if (is_initial_xendomain()) {
++#ifdef CONFIG_VT
++#if defined(CONFIG_VGA_CONSOLE)
++ conswitchp = &vga_con;
++#elif defined(CONFIG_DUMMY_CONSOLE)
++ conswitchp = &dummy_con;
++#endif
++#endif
++ } else {
++#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
++ conswitchp = &dummy_con;
++#endif
++ }
++ }
++#else /* CONFIG_XEN */
++
++#ifdef CONFIG_VT
++#if defined(CONFIG_VGA_CONSOLE)
++ conswitchp = &vga_con;
++#elif defined(CONFIG_DUMMY_CONSOLE)
++ conswitchp = &dummy_con;
++#endif
++#endif
++
++#endif /* !CONFIG_XEN */
++}
++
++#ifdef CONFIG_XEN
++static int
++xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
++{
++ HYPERVISOR_shutdown(SHUTDOWN_crash);
++ /* we're never actually going to get here... */
++ return NOTIFY_DONE;
++}
++#endif /* !CONFIG_XEN */
++
++
++static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
++{
++ unsigned int *v;
++
++ if (c->extended_cpuid_level < 0x80000004)
++ return 0;
++
++ v = (unsigned int *) c->x86_model_id;
++ cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
++ cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
++ cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
++ c->x86_model_id[48] = 0;
++ return 1;
++}
++
++
++static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
++{
++ unsigned int n, dummy, eax, ebx, ecx, edx;
++
++ n = c->extended_cpuid_level;
++
++ if (n >= 0x80000005) {
++ cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
++ printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
++ edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
++ c->x86_cache_size=(ecx>>24)+(edx>>24);
++ /* On K8 L1 TLB is inclusive, so don't count it */
++ c->x86_tlbsize = 0;
++ }
++
++ if (n >= 0x80000006) {
++ cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
++ ecx = cpuid_ecx(0x80000006);
++ c->x86_cache_size = ecx >> 16;
++ c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
++
++ printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
++ c->x86_cache_size, ecx & 0xFF);
++ }
++
++ if (n >= 0x80000007)
++ cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
++ if (n >= 0x80000008) {
++ cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
++ c->x86_virt_bits = (eax >> 8) & 0xff;
++ c->x86_phys_bits = eax & 0xff;
++ }
++}
++
++#ifdef CONFIG_NUMA
++static int nearby_node(int apicid)
++{
++ int i;
++ for (i = apicid - 1; i >= 0; i--) {
++ int node = apicid_to_node[i];
++ if (node != NUMA_NO_NODE && node_online(node))
++ return node;
++ }
++ for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
++ int node = apicid_to_node[i];
++ if (node != NUMA_NO_NODE && node_online(node))
++ return node;
++ }
++ return first_node(node_online_map); /* Shouldn't happen */
++}
++#endif
++
++/*
++ * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
++ * Assumes number of cores is a power of two.
++ */
++static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
++{
++#ifdef CONFIG_SMP
++ unsigned bits;
++#ifdef CONFIG_NUMA
++ int cpu = smp_processor_id();
++ int node = 0;
++ unsigned apicid = hard_smp_processor_id();
++#endif
++ unsigned ecx = cpuid_ecx(0x80000008);
++
++ c->x86_max_cores = (ecx & 0xff) + 1;
++
++ /* CPU telling us the core id bits shift? */
++ bits = (ecx >> 12) & 0xF;
++
++ /* Otherwise recompute */
++ if (bits == 0) {
++ while ((1 << bits) < c->x86_max_cores)
++ bits++;
++ }
++
++ /* Low order bits define the core id (index of core in socket) */
++ c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
++ /* Convert the APIC ID into the socket ID */
++ c->phys_proc_id = phys_pkg_id(bits);
++
++#ifdef CONFIG_NUMA
++ node = c->phys_proc_id;
++ if (apicid_to_node[apicid] != NUMA_NO_NODE)
++ node = apicid_to_node[apicid];
++ if (!node_online(node)) {
++ /* Two possibilities here:
++ - The CPU is missing memory and no node was created.
++ In that case try picking one from a nearby CPU
++ - The APIC IDs differ from the HyperTransport node IDs
++ which the K8 northbridge parsing fills in.
++ Assume they are all increased by a constant offset,
++ but in the same order as the HT nodeids.
++ If that doesn't result in a usable node fall back to the
++ path for the previous case. */
++ int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits);
++ if (ht_nodeid >= 0 &&
++ apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
++ node = apicid_to_node[ht_nodeid];
++ /* Pick a nearby node */
++ if (!node_online(node))
++ node = nearby_node(apicid);
++ }
++ numa_set_node(cpu, node);
++
++ printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
++#endif
++#endif
++}
++
++static void __init init_amd(struct cpuinfo_x86 *c)
++{
++ unsigned level;
++
++#ifdef CONFIG_SMP
++ unsigned long value;
++
++ /*
++ * Disable TLB flush filter by setting HWCR.FFDIS on K8
++ * bit 6 of msr C001_0015
++ *
++ * Errata 63 for SH-B3 steppings
++ * Errata 122 for all steppings (F+ have it disabled by default)
++ */
++ if (c->x86 == 15) {
++ rdmsrl(MSR_K8_HWCR, value);
++ value |= 1 << 6;
++ wrmsrl(MSR_K8_HWCR, value);
++ }
++#endif
++
++ /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
++ 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
++ clear_bit(0*32+31, &c->x86_capability);
++
++ /* On C+ stepping K8 rep microcode works well for copy/memset */
++ level = cpuid_eax(1);
++ if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
++ set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
++
++ /* Enable workaround for FXSAVE leak */
++ if (c->x86 >= 6)
++ set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);
++
++ level = get_model_name(c);
++ if (!level) {
++ switch (c->x86) {
++ case 15:
++ /* Should distinguish Models here, but this is only
++ a fallback anyways. */
++ strcpy(c->x86_model_id, "Hammer");
++ break;
++ }
++ }
++ display_cacheinfo(c);
++
++ /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
++ if (c->x86_power & (1<<8))
++ set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
++
++ /* Multi core CPU? */
++ if (c->extended_cpuid_level >= 0x80000008)
++ amd_detect_cmp(c);
++
++ /* Fix cpuid4 emulation for more */
++ num_cache_leaves = 3;
++}
++
++static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
++{
++#ifdef CONFIG_SMP
++ u32 eax, ebx, ecx, edx;
++ int index_msb, core_bits;
++
++ cpuid(1, &eax, &ebx, &ecx, &edx);
++
++
++ if (!cpu_has(c, X86_FEATURE_HT))
++ return;
++ if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
++ goto out;
++
++ smp_num_siblings = (ebx & 0xff0000) >> 16;
++
++ if (smp_num_siblings == 1) {
++ printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
++ } else if (smp_num_siblings > 1 ) {
++
++ if (smp_num_siblings > NR_CPUS) {
++ printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
++ smp_num_siblings = 1;
++ return;
++ }
++
++ index_msb = get_count_order(smp_num_siblings);
++ c->phys_proc_id = phys_pkg_id(index_msb);
++
++ smp_num_siblings = smp_num_siblings / c->x86_max_cores;
++
++ index_msb = get_count_order(smp_num_siblings) ;
++
++ core_bits = get_count_order(c->x86_max_cores);
++
++ c->cpu_core_id = phys_pkg_id(index_msb) &
++ ((1 << core_bits) - 1);
++ }
++out:
++ if ((c->x86_max_cores * smp_num_siblings) > 1) {
++ printk(KERN_INFO "CPU: Physical Processor ID: %d\n", c->phys_proc_id);
++ printk(KERN_INFO "CPU: Processor Core ID: %d\n", c->cpu_core_id);
++ }
++
++#endif
++}
++
++/*
++ * find out the number of processor cores on the die
++ */
++static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
++{
++ unsigned int eax, t;
++
++ if (c->cpuid_level < 4)
++ return 1;
++
++ cpuid_count(4, 0, &eax, &t, &t, &t);
++
++ if (eax & 0x1f)
++ return ((eax >> 26) + 1);
++ else
++ return 1;
++}
++
++static void srat_detect_node(void)
++{
++#ifdef CONFIG_NUMA
++ unsigned node;
++ int cpu = smp_processor_id();
++ int apicid = hard_smp_processor_id();
++
++ /* Don't do the funky fallback heuristics the AMD version employs
++ for now. */
++ node = apicid_to_node[apicid];
++ if (node == NUMA_NO_NODE)
++ node = first_node(node_online_map);
++ numa_set_node(cpu, node);
++
++ if (acpi_numa > 0)
++ printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
++#endif
++}
++
++static void __cpuinit init_intel(struct cpuinfo_x86 *c)
++{
++ /* Cache sizes */
++ unsigned n;
++
++ init_intel_cacheinfo(c);
++ if (c->cpuid_level > 9 ) {
++ unsigned eax = cpuid_eax(10);
++ /* Check for version and the number of counters */
++ if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
++ set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
++ }
++
++ n = c->extended_cpuid_level;
++ if (n >= 0x80000008) {
++ unsigned eax = cpuid_eax(0x80000008);
++ c->x86_virt_bits = (eax >> 8) & 0xff;
++ c->x86_phys_bits = eax & 0xff;
++ /* CPUID workaround for Intel 0F34 CPU */
++ if (c->x86_vendor == X86_VENDOR_INTEL &&
++ c->x86 == 0xF && c->x86_model == 0x3 &&
++ c->x86_mask == 0x4)
++ c->x86_phys_bits = 36;
++ }
++
++ if (c->x86 == 15)
++ c->x86_cache_alignment = c->x86_clflush_size * 2;
++ if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
++ (c->x86 == 0x6 && c->x86_model >= 0x0e))
++ set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
++ set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
++ c->x86_max_cores = intel_num_cpu_cores(c);
++
++ srat_detect_node();
++}
++
++static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
++{
++ char *v = c->x86_vendor_id;
++
++ if (!strcmp(v, "AuthenticAMD"))
++ c->x86_vendor = X86_VENDOR_AMD;
++ else if (!strcmp(v, "GenuineIntel"))
++ c->x86_vendor = X86_VENDOR_INTEL;
++ else
++ c->x86_vendor = X86_VENDOR_UNKNOWN;
++}
++
++struct cpu_model_info {
++ int vendor;
++ int family;
++ char *model_names[16];
++};
++
++/* Do some early cpuid on the boot CPU to get some parameter that are
++ needed before check_bugs. Everything advanced is in identify_cpu
++ below. */
++void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
++{
++ u32 tfms;
++
++ c->loops_per_jiffy = loops_per_jiffy;
++ c->x86_cache_size = -1;
++ c->x86_vendor = X86_VENDOR_UNKNOWN;
++ c->x86_model = c->x86_mask = 0; /* So far unknown... */
++ c->x86_vendor_id[0] = '\0'; /* Unset */
++ c->x86_model_id[0] = '\0'; /* Unset */
++ c->x86_clflush_size = 64;
++ c->x86_cache_alignment = c->x86_clflush_size;
++ c->x86_max_cores = 1;
++ c->extended_cpuid_level = 0;
++ memset(&c->x86_capability, 0, sizeof c->x86_capability);
++
++ /* Get vendor name */
++ cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
++ (unsigned int *)&c->x86_vendor_id[0],
++ (unsigned int *)&c->x86_vendor_id[8],
++ (unsigned int *)&c->x86_vendor_id[4]);
++
++ get_cpu_vendor(c);
++
++ /* Initialize the standard set of capabilities */
++ /* Note that the vendor-specific code below might override */
++
++ /* Intel-defined flags: level 0x00000001 */
++ if (c->cpuid_level >= 0x00000001) {
++ __u32 misc;
++ cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
++ &c->x86_capability[0]);
++ c->x86 = (tfms >> 8) & 0xf;
++ c->x86_model = (tfms >> 4) & 0xf;
++ c->x86_mask = tfms & 0xf;
++ if (c->x86 == 0xf)
++ c->x86 += (tfms >> 20) & 0xff;
++ if (c->x86 >= 0x6)
++ c->x86_model += ((tfms >> 16) & 0xF) << 4;
++ if (c->x86_capability[0] & (1<<19))
++ c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
++ } else {
++ /* Have CPUID level 0 only - unheard of */
++ c->x86 = 4;
++ }
++
++#ifdef CONFIG_SMP
++ c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
++#endif
++}
++
++/*
++ * This does the hard work of actually picking apart the CPU stuff...
++ */
++void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
++{
++ int i;
++ u32 xlvl;
++
++ early_identify_cpu(c);
++
++ /* AMD-defined flags: level 0x80000001 */
++ xlvl = cpuid_eax(0x80000000);
++ c->extended_cpuid_level = xlvl;
++ if ((xlvl & 0xffff0000) == 0x80000000) {
++ if (xlvl >= 0x80000001) {
++ c->x86_capability[1] = cpuid_edx(0x80000001);
++ c->x86_capability[6] = cpuid_ecx(0x80000001);
++ }
++ if (xlvl >= 0x80000004)
++ get_model_name(c); /* Default name */
++ }
++
++ /* Transmeta-defined flags: level 0x80860001 */
++ xlvl = cpuid_eax(0x80860000);
++ if ((xlvl & 0xffff0000) == 0x80860000) {
++ /* Don't set x86_cpuid_level here for now to not confuse. */
++ if (xlvl >= 0x80860001)
++ c->x86_capability[2] = cpuid_edx(0x80860001);
++ }
++
++ c->apicid = phys_pkg_id(0);
++
++ /*
++ * Vendor-specific initialization. In this section we
++ * canonicalize the feature flags, meaning if there are
++ * features a certain CPU supports which CPUID doesn't
++ * tell us, CPUID claiming incorrect flags, or other bugs,
++ * we handle them here.
++ *
++ * At the end of this section, c->x86_capability better
++ * indicate the features this CPU genuinely supports!
++ */
++ switch (c->x86_vendor) {
++ case X86_VENDOR_AMD:
++ init_amd(c);
++ break;
++
++ case X86_VENDOR_INTEL:
++ init_intel(c);
++ break;
++
++ case X86_VENDOR_UNKNOWN:
++ default:
++ display_cacheinfo(c);
++ break;
++ }
++
++ select_idle_routine(c);
++ detect_ht(c);
++
++ /*
++ * On SMP, boot_cpu_data holds the common feature set between
++ * all CPUs; so make sure that we indicate which features are
++ * common between the CPUs. The first time this routine gets
++ * executed, c == &boot_cpu_data.
++ */
++ if (c != &boot_cpu_data) {
++ /* AND the already accumulated flags with these */
++ for (i = 0 ; i < NCAPINTS ; i++)
++ boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
++ }
++
++#ifdef CONFIG_X86_MCE
++ mcheck_init(c);
++#endif
++ if (c == &boot_cpu_data)
++ mtrr_bp_init();
++ else
++ mtrr_ap_init();
++#ifdef CONFIG_NUMA
++ numa_add_cpu(smp_processor_id());
++#endif
++}
++
++
++void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
++{
++ if (c->x86_model_id[0])
++ printk("%s", c->x86_model_id);
++
++ if (c->x86_mask || c->cpuid_level >= 0)
++ printk(" stepping %02x\n", c->x86_mask);
++ else
++ printk("\n");
++}
++
++/*
++ * Get CPU information for use by the procfs.
++ */
++
++static int show_cpuinfo(struct seq_file *m, void *v)
++{
++ struct cpuinfo_x86 *c = v;
++
++ /*
++ * These flag bits must match the definitions in <asm/cpufeature.h>.
++ * NULL means this bit is undefined or reserved; either way it doesn't
++ * have meaning as far as Linux is concerned. Note that it's important
++ * to realize there is a difference between this table and CPUID -- if
++ * applications want to get the raw CPUID data, they should access
++ * /dev/cpu/<cpu_nr>/cpuid instead.
++ */
++ static char *x86_cap_flags[] = {
++ /* Intel-defined */
++ "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
++ "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
++ "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
++ "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
++
++ /* AMD-defined */
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
++ NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",
++
++ /* Transmeta-defined */
++ "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++
++ /* Other (Linux-defined) */
++ "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
++ "constant_tsc", NULL, NULL,
++ "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++
++ /* Intel-defined (#2) */
++ "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
++ "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++
++ /* VIA/Cyrix/Centaur-defined */
++ NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++
++ /* AMD-defined (#2) */
++ "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ };
++ static char *x86_power_flags[] = {
++ "ts", /* temperature sensor */
++ "fid", /* frequency id control */
++ "vid", /* voltage id control */
++ "ttp", /* thermal trip */
++ "tm",
++ "stc",
++ NULL,
++ /* nothing */ /* constant_tsc - moved to flags */
++ };
++
++
++#ifdef CONFIG_SMP
++ if (!cpu_online(c-cpu_data))
++ return 0;
++#endif
++
++ seq_printf(m,"processor\t: %u\n"
++ "vendor_id\t: %s\n"
++ "cpu family\t: %d\n"
++ "model\t\t: %d\n"
++ "model name\t: %s\n",
++ (unsigned)(c-cpu_data),
++ c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
++ c->x86,
++ (int)c->x86_model,
++ c->x86_model_id[0] ? c->x86_model_id : "unknown");
++
++ if (c->x86_mask || c->cpuid_level >= 0)
++ seq_printf(m, "stepping\t: %d\n", c->x86_mask);
++ else
++ seq_printf(m, "stepping\t: unknown\n");
++
++ if (cpu_has(c,X86_FEATURE_TSC)) {
++ unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
++ if (!freq)
++ freq = cpu_khz;
++ seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
++ freq / 1000, (freq % 1000));
++ }
++
++ /* Cache size */
++ if (c->x86_cache_size >= 0)
++ seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
++
++#ifdef CONFIG_SMP
++ if (smp_num_siblings * c->x86_max_cores > 1) {
++ int cpu = c - cpu_data;
++ seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
++ seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
++ seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
++ seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
++ }
++#endif
++
++ seq_printf(m,
++ "fpu\t\t: yes\n"
++ "fpu_exception\t: yes\n"
++ "cpuid level\t: %d\n"
++ "wp\t\t: yes\n"
++ "flags\t\t:",
++ c->cpuid_level);
++
++ {
++ int i;
++ for ( i = 0 ; i < 32*NCAPINTS ; i++ )
++ if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
++ seq_printf(m, " %s", x86_cap_flags[i]);
++ }
++
++ seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
++ c->loops_per_jiffy/(500000/HZ),
++ (c->loops_per_jiffy/(5000/HZ)) % 100);
++
++ if (c->x86_tlbsize > 0)
++ seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
++ seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
++ seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
++
++ seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
++ c->x86_phys_bits, c->x86_virt_bits);
++
++ seq_printf(m, "power management:");
++ {
++ unsigned i;
++ for (i = 0; i < 32; i++)
++ if (c->x86_power & (1 << i)) {
++ if (i < ARRAY_SIZE(x86_power_flags) &&
++ x86_power_flags[i])
++ seq_printf(m, "%s%s",
++ x86_power_flags[i][0]?" ":"",
++ x86_power_flags[i]);
++ else
++ seq_printf(m, " [%d]", i);
++ }
++ }
++
++ seq_printf(m, "\n\n");
++
++ return 0;
++}
++
++static void *c_start(struct seq_file *m, loff_t *pos)
++{
++ return *pos < NR_CPUS ? cpu_data + *pos : NULL;
++}
++
++static void *c_next(struct seq_file *m, void *v, loff_t *pos)
++{
++ ++*pos;
++ return c_start(m, pos);
++}
++
++static void c_stop(struct seq_file *m, void *v)
++{
++}
++
++struct seq_operations cpuinfo_op = {
++ .start =c_start,
++ .next = c_next,
++ .stop = c_stop,
++ .show = show_cpuinfo,
++};
++
++#if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
++#include <linux/platform_device.h>
++static __init int add_pcspkr(void)
++{
++ struct platform_device *pd;
++ int ret;
++
++ if (!is_initial_xendomain())
++ return 0;
++
++ pd = platform_device_alloc("pcspkr", -1);
++ if (!pd)
++ return -ENOMEM;
++
++ ret = platform_device_add(pd);
++ if (ret)
++ platform_device_put(pd);
++
++ return ret;
++}
++device_initcall(add_pcspkr);
++#endif
+Index: head-2008-11-25/arch/x86/kernel/setup64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/setup64-xen.c 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,367 @@
++/*
++ * X86-64 specific CPU setup.
++ * Copyright (C) 1995 Linus Torvalds
++ * Copyright 2001, 2002, 2003 SuSE Labs / Andi Kleen.
++ * See setup.c for older changelog.
++ *
++ * Jun Nakajima <jun.nakajima@intel.com>
++ * Modified for Xen
++ *
++ */
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/string.h>
++#include <linux/bootmem.h>
++#include <linux/bitops.h>
++#include <linux/module.h>
++#include <asm/bootsetup.h>
++#include <asm/pda.h>
++#include <asm/pgtable.h>
++#include <asm/processor.h>
++#include <asm/desc.h>
++#include <asm/atomic.h>
++#include <asm/mmu_context.h>
++#include <asm/smp.h>
++#include <asm/i387.h>
++#include <asm/percpu.h>
++#include <asm/proto.h>
++#include <asm/sections.h>
++#ifdef CONFIG_XEN
++#include <asm/hypervisor.h>
++#endif
++
++char x86_boot_params[BOOT_PARAM_SIZE] __initdata = {0,};
++
++cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
++
++struct x8664_pda *_cpu_pda[NR_CPUS] __read_mostly;
++EXPORT_SYMBOL(_cpu_pda);
++struct x8664_pda boot_cpu_pda[NR_CPUS] __cacheline_aligned;
++
++#ifndef CONFIG_X86_NO_IDT
++struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
++#endif
++
++char boot_cpu_stack[IRQSTACKSIZE] __attribute__((section(".bss.page_aligned")));
++
++unsigned long __supported_pte_mask __read_mostly = ~0UL;
++EXPORT_SYMBOL(__supported_pte_mask);
++static int do_not_nx __cpuinitdata = 0;
++
++/* noexec=on|off
++Control non executable mappings for 64bit processes.
++
++on Enable(default)
++off Disable
++*/
++int __init nonx_setup(char *str)
++{
++ if (!strncmp(str, "on", 2)) {
++ __supported_pte_mask |= _PAGE_NX;
++ do_not_nx = 0;
++ } else if (!strncmp(str, "off", 3)) {
++ do_not_nx = 1;
++ __supported_pte_mask &= ~_PAGE_NX;
++ }
++ return 1;
++}
++__setup("noexec=", nonx_setup); /* parsed early actually */
++
++int force_personality32 = 0;
++
++/* noexec32=on|off
++Control non executable heap for 32bit processes.
++To control the stack too use noexec=off
++
++on PROT_READ does not imply PROT_EXEC for 32bit processes
++off PROT_READ implies PROT_EXEC (default)
++*/
++static int __init nonx32_setup(char *str)
++{
++ if (!strcmp(str, "on"))
++ force_personality32 &= ~READ_IMPLIES_EXEC;
++ else if (!strcmp(str, "off"))
++ force_personality32 |= READ_IMPLIES_EXEC;
++ return 1;
++}
++__setup("noexec32=", nonx32_setup);
++
++/*
++ * Great future plan:
++ * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
++ * Always point %gs to its beginning
++ */
++void __init setup_per_cpu_areas(void)
++{
++ int i;
++ unsigned long size;
++
++#ifdef CONFIG_HOTPLUG_CPU
++ prefill_possible_map();
++#endif
++
++ /* Copy section for each CPU (we discard the original) */
++ size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
++#ifdef CONFIG_MODULES
++ if (size < PERCPU_ENOUGH_ROOM)
++ size = PERCPU_ENOUGH_ROOM;
++#endif
++
++ for_each_cpu_mask (i, cpu_possible_map) {
++ char *ptr;
++
++ if (!NODE_DATA(cpu_to_node(i))) {
++ printk("cpu with no node %d, num_online_nodes %d\n",
++ i, num_online_nodes());
++ ptr = alloc_bootmem(size);
++ } else {
++ ptr = alloc_bootmem_node(NODE_DATA(cpu_to_node(i)), size);
++ }
++ if (!ptr)
++ panic("Cannot allocate cpu data for CPU %d\n", i);
++ cpu_pda(i)->data_offset = ptr - __per_cpu_start;
++ memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
++ }
++}
++
++#ifdef CONFIG_XEN
++static void switch_pt(void)
++{
++ xen_pt_switch(__pa_symbol(init_level4_pgt));
++ xen_new_user_pt(__pa_symbol(__user_pgd(init_level4_pgt)));
++}
++
++static void __cpuinit cpu_gdt_init(const struct desc_ptr *gdt_descr)
++{
++ unsigned long frames[16];
++ unsigned long va;
++ int f;
++
++ for (va = gdt_descr->address, f = 0;
++ va < gdt_descr->address + gdt_descr->size;
++ va += PAGE_SIZE, f++) {
++ frames[f] = virt_to_mfn(va);
++ make_page_readonly(
++ (void *)va, XENFEAT_writable_descriptor_tables);
++ }
++ if (HYPERVISOR_set_gdt(frames, (gdt_descr->size + 1) /
++ sizeof (struct desc_struct)))
++ BUG();
++}
++#else
++static void switch_pt(void)
++{
++ asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt)));
++}
++
++static void __cpuinit cpu_gdt_init(const struct desc_ptr *gdt_descr)
++{
++ asm volatile("lgdt %0" :: "m" (*gdt_descr));
++ asm volatile("lidt %0" :: "m" (idt_descr));
++}
++#endif
++
++void pda_init(int cpu)
++{
++ struct x8664_pda *pda = cpu_pda(cpu);
++
++ /* Setup up data that may be needed in __get_free_pages early */
++ asm volatile("movl %0,%%fs ; movl %0,%%gs" :: "r" (0));
++#ifndef CONFIG_XEN
++ wrmsrl(MSR_GS_BASE, pda);
++#else
++ if (HYPERVISOR_set_segment_base(SEGBASE_GS_KERNEL,
++ (unsigned long)pda))
++ BUG();
++#endif
++ pda->cpunumber = cpu;
++ pda->irqcount = -1;
++ pda->kernelstack =
++ (unsigned long)stack_thread_info() - PDA_STACKOFFSET + THREAD_SIZE;
++ pda->active_mm = &init_mm;
++ pda->mmu_state = 0;
++
++ if (cpu == 0) {
++#ifdef CONFIG_XEN
++ xen_init_pt();
++#endif
++ /* others are initialized in smpboot.c */
++ pda->pcurrent = &init_task;
++ pda->irqstackptr = boot_cpu_stack;
++ } else {
++ pda->irqstackptr = (char *)
++ __get_free_pages(GFP_ATOMIC, IRQSTACK_ORDER);
++ if (!pda->irqstackptr)
++ panic("cannot allocate irqstack for cpu %d", cpu);
++ }
++
++ switch_pt();
++
++ pda->irqstackptr += IRQSTACKSIZE-64;
++}
++
++#ifndef CONFIG_X86_NO_TSS
++char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]
++__attribute__((section(".bss.page_aligned")));
++#endif
++
++/* May not be marked __init: used by software suspend */
++void syscall_init(void)
++{
++#ifndef CONFIG_XEN
++ /*
++ * LSTAR and STAR live in a bit strange symbiosis.
++ * They both write to the same internal register. STAR allows to set CS/DS
++ * but only a 32bit target. LSTAR sets the 64bit rip.
++ */
++ wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32);
++ wrmsrl(MSR_LSTAR, system_call);
++
++ /* Flags to clear on syscall */
++ wrmsrl(MSR_SYSCALL_MASK, EF_TF|EF_DF|EF_IE|0x3000);
++#endif
++#ifdef CONFIG_IA32_EMULATION
++ syscall32_cpu_init ();
++#endif
++}
++
++void __cpuinit check_efer(void)
++{
++ unsigned long efer;
++
++ rdmsrl(MSR_EFER, efer);
++ if (!(efer & EFER_NX) || do_not_nx) {
++ __supported_pte_mask &= ~_PAGE_NX;
++ }
++}
++
++unsigned long kernel_eflags;
++
++/*
++ * cpu_init() initializes state that is per-CPU. Some data is already
++ * initialized (naturally) in the bootstrap process, such as the GDT
++ * and IDT. We reload them nevertheless, this function acts as a
++ * 'CPU state barrier', nothing should get across.
++ * A lot of state is already set up in PDA init.
++ */
++void __cpuinit cpu_init (void)
++{
++ int cpu = stack_smp_processor_id();
++#ifndef CONFIG_X86_NO_TSS
++ struct tss_struct *t = &per_cpu(init_tss, cpu);
++ struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
++ unsigned long v;
++ char *estacks = NULL;
++ unsigned i;
++#endif
++ struct task_struct *me;
++
++ /* CPU 0 is initialised in head64.c */
++ if (cpu != 0) {
++ pda_init(cpu);
++ zap_low_mappings(cpu);
++ }
++#ifndef CONFIG_X86_NO_TSS
++ else
++ estacks = boot_exception_stacks;
++#endif
++
++ me = current;
++
++ if (cpu_test_and_set(cpu, cpu_initialized))
++ panic("CPU#%d already initialized!\n", cpu);
++
++ printk("Initializing CPU#%d\n", cpu);
++
++ clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
++
++ /*
++ * Initialize the per-CPU GDT with the boot GDT,
++ * and set up the GDT descriptor:
++ */
++#ifndef CONFIG_XEN
++ if (cpu)
++ memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
++#endif
++
++ cpu_gdt_descr[cpu].size = GDT_SIZE;
++ cpu_gdt_init(&cpu_gdt_descr[cpu]);
++
++ memset(me->thread.tls_array, 0, GDT_ENTRY_TLS_ENTRIES * 8);
++ syscall_init();
++
++ wrmsrl(MSR_FS_BASE, 0);
++ wrmsrl(MSR_KERNEL_GS_BASE, 0);
++ barrier();
++
++ check_efer();
++
++#ifndef CONFIG_X86_NO_TSS
++ /*
++ * set up and load the per-CPU TSS
++ */
++ for (v = 0; v < N_EXCEPTION_STACKS; v++) {
++ if (cpu) {
++ static const unsigned int order[N_EXCEPTION_STACKS] = {
++ [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
++ [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
++ };
++
++ estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
++ if (!estacks)
++ panic("Cannot allocate exception stack %ld %d\n",
++ v, cpu);
++ }
++ switch (v + 1) {
++#if DEBUG_STKSZ > EXCEPTION_STKSZ
++ case DEBUG_STACK:
++ cpu_pda(cpu)->debugstack = (unsigned long)estacks;
++ estacks += DEBUG_STKSZ;
++ break;
++#endif
++ default:
++ estacks += EXCEPTION_STKSZ;
++ break;
++ }
++ orig_ist->ist[v] = t->ist[v] = (unsigned long)estacks;
++ }
++
++ t->io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
++ /*
++ * <= is required because the CPU will access up to
++ * 8 bits beyond the end of the IO permission bitmap.
++ */
++ for (i = 0; i <= IO_BITMAP_LONGS; i++)
++ t->io_bitmap[i] = ~0UL;
++#endif
++
++ atomic_inc(&init_mm.mm_count);
++ me->active_mm = &init_mm;
++ if (me->mm)
++ BUG();
++ enter_lazy_tlb(&init_mm, me);
++
++#ifndef CONFIG_X86_NO_TSS
++ set_tss_desc(cpu, t);
++#endif
++#ifndef CONFIG_XEN
++ load_TR_desc();
++#endif
++ load_LDT(&init_mm.context);
++
++ /*
++ * Clear all 6 debug registers:
++ */
++
++ set_debugreg(0UL, 0);
++ set_debugreg(0UL, 1);
++ set_debugreg(0UL, 2);
++ set_debugreg(0UL, 3);
++ set_debugreg(0UL, 6);
++ set_debugreg(0UL, 7);
++
++ fpu_init();
++
++ raw_local_save_flags(kernel_eflags);
++}
+Index: head-2008-11-25/arch/x86/kernel/smp_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/smp_64-xen.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,575 @@
++/*
++ * Intel SMP support routines.
++ *
++ * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
++ * (c) 1998-99, 2000 Ingo Molnar <mingo@redhat.com>
++ * (c) 2002,2003 Andi Kleen, SuSE Labs.
++ *
++ * This code is released under the GNU General Public License version 2 or
++ * later.
++ */
++
++#include <linux/init.h>
++
++#include <linux/mm.h>
++#include <linux/delay.h>
++#include <linux/spinlock.h>
++#include <linux/smp_lock.h>
++#include <linux/smp.h>
++#include <linux/kernel_stat.h>
++#include <linux/mc146818rtc.h>
++#include <linux/interrupt.h>
++
++#include <asm/mtrr.h>
++#include <asm/pgalloc.h>
++#include <asm/tlbflush.h>
++#include <asm/mach_apic.h>
++#include <asm/mmu_context.h>
++#include <asm/proto.h>
++#include <asm/apicdef.h>
++#include <asm/idle.h>
++#ifdef CONFIG_XEN
++#include <xen/evtchn.h>
++#endif
++
++#ifndef CONFIG_XEN
++/*
++ * Smarter SMP flushing macros.
++ * c/o Linus Torvalds.
++ *
++ * These mean you can really definitely utterly forget about
++ * writing to user space from interrupts. (Its not allowed anyway).
++ *
++ * Optimizations Manfred Spraul <manfred@colorfullife.com>
++ *
++ * More scalable flush, from Andi Kleen
++ *
++ * To avoid global state use 8 different call vectors.
++ * Each CPU uses a specific vector to trigger flushes on other
++ * CPUs. Depending on the received vector the target CPUs look into
++ * the right per cpu variable for the flush data.
++ *
++ * With more than 8 CPUs they are hashed to the 8 available
++ * vectors. The limited global vector space forces us to this right now.
++ * In future when interrupts are split into per CPU domains this could be
++ * fixed, at the cost of triggering multiple IPIs in some cases.
++ */
++
++union smp_flush_state {
++ struct {
++ cpumask_t flush_cpumask;
++ struct mm_struct *flush_mm;
++ unsigned long flush_va;
++#define FLUSH_ALL -1ULL
++ spinlock_t tlbstate_lock;
++ };
++ char pad[SMP_CACHE_BYTES];
++} ____cacheline_aligned;
++
++/* State is put into the per CPU data section, but padded
++ to a full cache line because other CPUs can access it and we don't
++ want false sharing in the per cpu data segment. */
++static DEFINE_PER_CPU(union smp_flush_state, flush_state);
++
++/*
++ * We cannot call mmdrop() because we are in interrupt context,
++ * instead update mm->cpu_vm_mask.
++ */
++static inline void leave_mm(unsigned long cpu)
++{
++ if (read_pda(mmu_state) == TLBSTATE_OK)
++ BUG();
++ cpu_clear(cpu, read_pda(active_mm)->cpu_vm_mask);
++ load_cr3(swapper_pg_dir);
++}
++
++/*
++ *
++ * The flush IPI assumes that a thread switch happens in this order:
++ * [cpu0: the cpu that switches]
++ * 1) switch_mm() either 1a) or 1b)
++ * 1a) thread switch to a different mm
++ * 1a1) cpu_clear(cpu, old_mm->cpu_vm_mask);
++ * Stop ipi delivery for the old mm. This is not synchronized with
++ * the other cpus, but smp_invalidate_interrupt ignore flush ipis
++ * for the wrong mm, and in the worst case we perform a superfluous
++ * tlb flush.
++ * 1a2) set cpu mmu_state to TLBSTATE_OK
++ * Now the smp_invalidate_interrupt won't call leave_mm if cpu0
++ * was in lazy tlb mode.
++ * 1a3) update cpu active_mm
++ * Now cpu0 accepts tlb flushes for the new mm.
++ * 1a4) cpu_set(cpu, new_mm->cpu_vm_mask);
++ * Now the other cpus will send tlb flush ipis.
++ * 1a4) change cr3.
++ * 1b) thread switch without mm change
++ * cpu active_mm is correct, cpu0 already handles
++ * flush ipis.
++ * 1b1) set cpu mmu_state to TLBSTATE_OK
++ * 1b2) test_and_set the cpu bit in cpu_vm_mask.
++ * Atomically set the bit [other cpus will start sending flush ipis],
++ * and test the bit.
++ * 1b3) if the bit was 0: leave_mm was called, flush the tlb.
++ * 2) switch %%esp, ie current
++ *
++ * The interrupt must handle 2 special cases:
++ * - cr3 is changed before %%esp, ie. it cannot use current->{active_,}mm.
++ * - the cpu performs speculative tlb reads, i.e. even if the cpu only
++ * runs in kernel space, the cpu could load tlb entries for user space
++ * pages.
++ *
++ * The good news is that cpu mmu_state is local to each cpu, no
++ * write/read ordering problems.
++ */
++
++/*
++ * TLB flush IPI:
++ *
++ * 1) Flush the tlb entries if the cpu uses the mm that's being flushed.
++ * 2) Leave the mm if we are in the lazy tlb mode.
++ *
++ * Interrupts are disabled.
++ */
++
++asmlinkage void smp_invalidate_interrupt(struct pt_regs *regs)
++{
++ int cpu;
++ int sender;
++ union smp_flush_state *f;
++
++ cpu = smp_processor_id();
++ /*
++ * orig_rax contains the negated interrupt vector.
++ * Use that to determine where the sender put the data.
++ */
++ sender = ~regs->orig_rax - INVALIDATE_TLB_VECTOR_START;
++ f = &per_cpu(flush_state, sender);
++
++ if (!cpu_isset(cpu, f->flush_cpumask))
++ goto out;
++ /*
++ * This was a BUG() but until someone can quote me the
++ * line from the intel manual that guarantees an IPI to
++ * multiple CPUs is retried _only_ on the erroring CPUs
++ * its staying as a return
++ *
++ * BUG();
++ */
++
++ if (f->flush_mm == read_pda(active_mm)) {
++ if (read_pda(mmu_state) == TLBSTATE_OK) {
++ if (f->flush_va == FLUSH_ALL)
++ local_flush_tlb();
++ else
++ __flush_tlb_one(f->flush_va);
++ } else
++ leave_mm(cpu);
++ }
++out:
++ ack_APIC_irq();
++ cpu_clear(cpu, f->flush_cpumask);
++}
++
++static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
++ unsigned long va)
++{
++ int sender;
++ union smp_flush_state *f;
++
++ /* Caller has disabled preemption */
++ sender = smp_processor_id() % NUM_INVALIDATE_TLB_VECTORS;
++ f = &per_cpu(flush_state, sender);
++
++ /* Could avoid this lock when
++ num_online_cpus() <= NUM_INVALIDATE_TLB_VECTORS, but it is
++ probably not worth checking this for a cache-hot lock. */
++ spin_lock(&f->tlbstate_lock);
++
++ f->flush_mm = mm;
++ f->flush_va = va;
++ cpus_or(f->flush_cpumask, cpumask, f->flush_cpumask);
++
++ /*
++ * We have to send the IPI only to
++ * CPUs affected.
++ */
++ send_IPI_mask(cpumask, INVALIDATE_TLB_VECTOR_START + sender);
++
++ while (!cpus_empty(f->flush_cpumask))
++ cpu_relax();
++
++ f->flush_mm = NULL;
++ f->flush_va = 0;
++ spin_unlock(&f->tlbstate_lock);
++}
++
++int __cpuinit init_smp_flush(void)
++{
++ int i;
++ for_each_cpu_mask(i, cpu_possible_map) {
++ spin_lock_init(&per_cpu(flush_state, i).tlbstate_lock);
++ }
++ return 0;
++}
++
++core_initcall(init_smp_flush);
++
++void flush_tlb_current_task(void)
++{
++ struct mm_struct *mm = current->mm;
++ cpumask_t cpu_mask;
++
++ preempt_disable();
++ cpu_mask = mm->cpu_vm_mask;
++ cpu_clear(smp_processor_id(), cpu_mask);
++
++ local_flush_tlb();
++ if (!cpus_empty(cpu_mask))
++ flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
++ preempt_enable();
++}
++EXPORT_SYMBOL(flush_tlb_current_task);
++
++void flush_tlb_mm (struct mm_struct * mm)
++{
++ cpumask_t cpu_mask;
++
++ preempt_disable();
++ cpu_mask = mm->cpu_vm_mask;
++ cpu_clear(smp_processor_id(), cpu_mask);
++
++ if (current->active_mm == mm) {
++ if (current->mm)
++ local_flush_tlb();
++ else
++ leave_mm(smp_processor_id());
++ }
++ if (!cpus_empty(cpu_mask))
++ flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
++
++ preempt_enable();
++}
++EXPORT_SYMBOL(flush_tlb_mm);
++
++void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
++{
++ struct mm_struct *mm = vma->vm_mm;
++ cpumask_t cpu_mask;
++
++ preempt_disable();
++ cpu_mask = mm->cpu_vm_mask;
++ cpu_clear(smp_processor_id(), cpu_mask);
++
++ if (current->active_mm == mm) {
++ if(current->mm)
++ __flush_tlb_one(va);
++ else
++ leave_mm(smp_processor_id());
++ }
++
++ if (!cpus_empty(cpu_mask))
++ flush_tlb_others(cpu_mask, mm, va);
++
++ preempt_enable();
++}
++EXPORT_SYMBOL(flush_tlb_page);
++
++static void do_flush_tlb_all(void* info)
++{
++ unsigned long cpu = smp_processor_id();
++
++ __flush_tlb_all();
++ if (read_pda(mmu_state) == TLBSTATE_LAZY)
++ leave_mm(cpu);
++}
++
++void flush_tlb_all(void)
++{
++ on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
++}
++#endif /* Xen */
++
++/*
++ * this function sends a 'reschedule' IPI to another CPU.
++ * it goes straight through and wastes no time serializing
++ * anything. Worst case is that we lose a reschedule ...
++ */
++
++void smp_send_reschedule(int cpu)
++{
++ send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
++}
++
++/*
++ * Structure and data for smp_call_function(). This is designed to minimise
++ * static memory requirements. It also looks cleaner.
++ */
++static DEFINE_SPINLOCK(call_lock);
++
++struct call_data_struct {
++ void (*func) (void *info);
++ void *info;
++ atomic_t started;
++ atomic_t finished;
++ int wait;
++};
++
++static struct call_data_struct * call_data;
++
++void lock_ipi_call_lock(void)
++{
++ spin_lock_irq(&call_lock);
++}
++
++void unlock_ipi_call_lock(void)
++{
++ spin_unlock_irq(&call_lock);
++}
++
++/*
++ * this function sends a 'generic call function' IPI to one other CPU
++ * in the system.
++ *
++ * cpu is a standard Linux logical CPU number.
++ */
++static void
++__smp_call_function_single(int cpu, void (*func) (void *info), void *info,
++ int nonatomic, int wait)
++{
++ struct call_data_struct data;
++ int cpus = 1;
++
++ data.func = func;
++ data.info = info;
++ atomic_set(&data.started, 0);
++ data.wait = wait;
++ if (wait)
++ atomic_set(&data.finished, 0);
++
++ call_data = &data;
++ wmb();
++ /* Send a message to all other CPUs and wait for them to respond */
++ send_IPI_mask(cpumask_of_cpu(cpu), CALL_FUNCTION_VECTOR);
++
++ /* Wait for response */
++ while (atomic_read(&data.started) != cpus)
++ cpu_relax();
++
++ if (!wait)
++ return;
++
++ while (atomic_read(&data.finished) != cpus)
++ cpu_relax();
++}
++
++/*
++ * smp_call_function_single - Run a function on another CPU
++ * @func: The function to run. This must be fast and non-blocking.
++ * @info: An arbitrary pointer to pass to the function.
++ * @nonatomic: Currently unused.
++ * @wait: If true, wait until function has completed on other CPUs.
++ *
++ * Retrurns 0 on success, else a negative status code.
++ *
++ * Does not return until the remote CPU is nearly ready to execute <func>
++ * or is or has executed.
++ */
++
++int smp_call_function_single (int cpu, void (*func) (void *info), void *info,
++ int nonatomic, int wait)
++{
++ /* prevent preemption and reschedule on another processor */
++ int me = get_cpu();
++ if (cpu == me) {
++ WARN_ON(1);
++ put_cpu();
++ return -EBUSY;
++ }
++ spin_lock_bh(&call_lock);
++ __smp_call_function_single(cpu, func, info, nonatomic, wait);
++ spin_unlock_bh(&call_lock);
++ put_cpu();
++ return 0;
++}
++
++/*
++ * this function sends a 'generic call function' IPI to all other CPUs
++ * in the system.
++ */
++static void __smp_call_function (void (*func) (void *info), void *info,
++ int nonatomic, int wait)
++{
++ struct call_data_struct data;
++ int cpus = num_online_cpus()-1;
++
++ if (!cpus)
++ return;
++
++ data.func = func;
++ data.info = info;
++ atomic_set(&data.started, 0);
++ data.wait = wait;
++ if (wait)
++ atomic_set(&data.finished, 0);
++
++ call_data = &data;
++ wmb();
++ /* Send a message to all other CPUs and wait for them to respond */
++ send_IPI_allbutself(CALL_FUNCTION_VECTOR);
++
++ /* Wait for response */
++ while (atomic_read(&data.started) != cpus)
++ cpu_relax();
++
++ if (!wait)
++ return;
++
++ while (atomic_read(&data.finished) != cpus)
++ cpu_relax();
++}
++
++/*
++ * smp_call_function - run a function on all other CPUs.
++ * @func: The function to run. This must be fast and non-blocking.
++ * @info: An arbitrary pointer to pass to the function.
++ * @nonatomic: currently unused.
++ * @wait: If true, wait (atomically) until function has completed on other
++ * CPUs.
++ *
++ * Returns 0 on success, else a negative status code. Does not return until
++ * remote CPUs are nearly ready to execute func or are or have executed.
++ *
++ * You must not call this function with disabled interrupts or from a
++ * hardware interrupt handler or from a bottom half handler.
++ * Actually there are a few legal cases, like panic.
++ */
++int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
++ int wait)
++{
++ spin_lock(&call_lock);
++ __smp_call_function(func,info,nonatomic,wait);
++ spin_unlock(&call_lock);
++ return 0;
++}
++EXPORT_SYMBOL(smp_call_function);
++
++void smp_stop_cpu(void)
++{
++ unsigned long flags;
++ /*
++ * Remove this CPU:
++ */
++ cpu_clear(smp_processor_id(), cpu_online_map);
++ local_irq_save(flags);
++ disable_all_local_evtchn();
++ local_irq_restore(flags);
++}
++
++static void smp_really_stop_cpu(void *dummy)
++{
++ smp_stop_cpu();
++ for (;;)
++ halt();
++}
++
++void smp_send_stop(void)
++{
++ int nolock = 0;
++#ifndef CONFIG_XEN
++ if (reboot_force)
++ return;
++#endif
++ /* Don't deadlock on the call lock in panic */
++ if (!spin_trylock(&call_lock)) {
++ /* ignore locking because we have panicked anyways */
++ nolock = 1;
++ }
++ __smp_call_function(smp_really_stop_cpu, NULL, 0, 0);
++ if (!nolock)
++ spin_unlock(&call_lock);
++
++ local_irq_disable();
++ disable_all_local_evtchn();
++ local_irq_enable();
++}
++
++/*
++ * Reschedule call back. Nothing to do,
++ * all the work is done automatically when
++ * we return from the interrupt.
++ */
++#ifndef CONFIG_XEN
++asmlinkage void smp_reschedule_interrupt(void)
++#else
++asmlinkage irqreturn_t smp_reschedule_interrupt(void)
++#endif
++{
++#ifndef CONFIG_XEN
++ ack_APIC_irq();
++#else
++ return IRQ_HANDLED;
++#endif
++}
++
++#ifndef CONFIG_XEN
++asmlinkage void smp_call_function_interrupt(void)
++#else
++asmlinkage irqreturn_t smp_call_function_interrupt(void)
++#endif
++{
++ void (*func) (void *info) = call_data->func;
++ void *info = call_data->info;
++ int wait = call_data->wait;
++
++#ifndef CONFIG_XEN
++ ack_APIC_irq();
++#endif
++ /*
++ * Notify initiating CPU that I've grabbed the data and am
++ * about to execute the function
++ */
++ mb();
++ atomic_inc(&call_data->started);
++ /*
++ * At this point the info structure may be out of scope unless wait==1
++ */
++ exit_idle();
++ irq_enter();
++ (*func)(info);
++ irq_exit();
++ if (wait) {
++ mb();
++ atomic_inc(&call_data->finished);
++ }
++#ifdef CONFIG_XEN
++ return IRQ_HANDLED;
++#endif
++}
++
++int safe_smp_processor_id(void)
++{
++#ifdef CONFIG_XEN
++ return smp_processor_id();
++#else
++ unsigned apicid, i;
++
++ if (disable_apic)
++ return 0;
++
++ apicid = hard_smp_processor_id();
++ if (apicid < NR_CPUS && x86_cpu_to_apicid[apicid] == apicid)
++ return apicid;
++
++ for (i = 0; i < NR_CPUS; ++i) {
++ if (x86_cpu_to_apicid[i] == apicid)
++ return i;
++ }
++
++ /* No entries in x86_cpu_to_apicid? Either no MPS|ACPI,
++ * or called too early. Either way, we must be CPU 0. */
++ if (x86_cpu_to_apicid[0] == BAD_APICID)
++ return 0;
++
++ return 0; /* Should not happen */
++#endif
++}
+Index: head-2008-11-25/arch/x86/kernel/traps_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/traps_64-xen.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,1173 @@
++/*
++ * linux/arch/x86-64/traps.c
++ *
++ * Copyright (C) 1991, 1992 Linus Torvalds
++ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
++ *
++ * Pentium III FXSR, SSE support
++ * Gareth Hughes <gareth@valinux.com>, May 2000
++ */
++
++/*
++ * 'Traps.c' handles hardware traps and faults after we have saved some
++ * state in 'entry.S'.
++ */
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/string.h>
++#include <linux/errno.h>
++#include <linux/ptrace.h>
++#include <linux/timer.h>
++#include <linux/mm.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/spinlock.h>
++#include <linux/interrupt.h>
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++#include <linux/nmi.h>
++#include <linux/kprobes.h>
++#include <linux/kexec.h>
++#include <linux/unwind.h>
++
++#include <asm/system.h>
++#include <asm/uaccess.h>
++#include <asm/io.h>
++#include <asm/atomic.h>
++#include <asm/debugreg.h>
++#include <asm/desc.h>
++#include <asm/i387.h>
++#include <asm/kdebug.h>
++#include <asm/processor.h>
++#include <asm/unwind.h>
++#include <asm/smp.h>
++#include <asm/pgalloc.h>
++#include <asm/pda.h>
++#include <asm/proto.h>
++#include <asm/nmi.h>
++
++asmlinkage void divide_error(void);
++asmlinkage void debug(void);
++asmlinkage void nmi(void);
++asmlinkage void int3(void);
++asmlinkage void overflow(void);
++asmlinkage void bounds(void);
++asmlinkage void invalid_op(void);
++asmlinkage void device_not_available(void);
++asmlinkage void double_fault(void);
++asmlinkage void coprocessor_segment_overrun(void);
++asmlinkage void invalid_TSS(void);
++asmlinkage void segment_not_present(void);
++asmlinkage void stack_segment(void);
++asmlinkage void general_protection(void);
++asmlinkage void page_fault(void);
++asmlinkage void coprocessor_error(void);
++asmlinkage void simd_coprocessor_error(void);
++asmlinkage void reserved(void);
++asmlinkage void alignment_check(void);
++asmlinkage void machine_check(void);
++asmlinkage void spurious_interrupt_bug(void);
++
++ATOMIC_NOTIFIER_HEAD(die_chain);
++EXPORT_SYMBOL(die_chain);
++
++int register_die_notifier(struct notifier_block *nb)
++{
++ vmalloc_sync_all();
++ return atomic_notifier_chain_register(&die_chain, nb);
++}
++EXPORT_SYMBOL(register_die_notifier); /* used modular by kdb */
++
++int unregister_die_notifier(struct notifier_block *nb)
++{
++ return atomic_notifier_chain_unregister(&die_chain, nb);
++}
++EXPORT_SYMBOL(unregister_die_notifier); /* used modular by kdb */
++
++static inline void conditional_sti(struct pt_regs *regs)
++{
++ if (regs->eflags & X86_EFLAGS_IF)
++ local_irq_enable();
++}
++
++static inline void preempt_conditional_sti(struct pt_regs *regs)
++{
++ preempt_disable();
++ if (regs->eflags & X86_EFLAGS_IF)
++ local_irq_enable();
++}
++
++static inline void preempt_conditional_cli(struct pt_regs *regs)
++{
++ if (regs->eflags & X86_EFLAGS_IF)
++ local_irq_disable();
++ /* Make sure to not schedule here because we could be running
++ on an exception stack. */
++ preempt_enable_no_resched();
++}
++
++static int kstack_depth_to_print = 12;
++#ifdef CONFIG_STACK_UNWIND
++static int call_trace = 1;
++#else
++#define call_trace (-1)
++#endif
++
++#ifdef CONFIG_KALLSYMS
++# include <linux/kallsyms.h>
++void printk_address(unsigned long address)
++{
++ unsigned long offset = 0, symsize;
++ const char *symname;
++ char *modname;
++ char *delim = ":";
++ char namebuf[128];
++
++ symname = kallsyms_lookup(address, &symsize, &offset,
++ &modname, namebuf);
++ if (!symname) {
++ printk(" [<%016lx>]\n", address);
++ return;
++ }
++ if (!modname)
++ modname = delim = "";
++ printk(" [<%016lx>] %s%s%s%s+0x%lx/0x%lx\n",
++ address, delim, modname, delim, symname, offset, symsize);
++}
++#else
++void printk_address(unsigned long address)
++{
++ printk(" [<%016lx>]\n", address);
++}
++#endif
++
++static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
++ unsigned *usedp, const char **idp)
++{
++#ifndef CONFIG_X86_NO_TSS
++ static char ids[][8] = {
++ [DEBUG_STACK - 1] = "#DB",
++ [NMI_STACK - 1] = "NMI",
++ [DOUBLEFAULT_STACK - 1] = "#DF",
++ [STACKFAULT_STACK - 1] = "#SS",
++ [MCE_STACK - 1] = "#MC",
++#if DEBUG_STKSZ > EXCEPTION_STKSZ
++ [N_EXCEPTION_STACKS ... N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
++#endif
++ };
++ unsigned k;
++
++ /*
++ * Iterate over all exception stacks, and figure out whether
++ * 'stack' is in one of them:
++ */
++ for (k = 0; k < N_EXCEPTION_STACKS; k++) {
++ unsigned long end;
++
++ /*
++ * set 'end' to the end of the exception stack.
++ */
++ switch (k + 1) {
++ /*
++ * TODO: this block is not needed i think, because
++ * setup64.c:cpu_init() sets up t->ist[DEBUG_STACK]
++ * properly too.
++ */
++#if DEBUG_STKSZ > EXCEPTION_STKSZ
++ case DEBUG_STACK:
++ end = cpu_pda(cpu)->debugstack + DEBUG_STKSZ;
++ break;
++#endif
++ default:
++ end = per_cpu(orig_ist, cpu).ist[k];
++ break;
++ }
++ /*
++ * Is 'stack' above this exception frame's end?
++ * If yes then skip to the next frame.
++ */
++ if (stack >= end)
++ continue;
++ /*
++ * Is 'stack' above this exception frame's start address?
++ * If yes then we found the right frame.
++ */
++ if (stack >= end - EXCEPTION_STKSZ) {
++ /*
++ * Make sure we only iterate through an exception
++ * stack once. If it comes up for the second time
++ * then there's something wrong going on - just
++ * break out and return NULL:
++ */
++ if (*usedp & (1U << k))
++ break;
++ *usedp |= 1U << k;
++ *idp = ids[k];
++ return (unsigned long *)end;
++ }
++ /*
++ * If this is a debug stack, and if it has a larger size than
++ * the usual exception stacks, then 'stack' might still
++ * be within the lower portion of the debug stack:
++ */
++#if DEBUG_STKSZ > EXCEPTION_STKSZ
++ if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
++ unsigned j = N_EXCEPTION_STACKS - 1;
++
++ /*
++ * Black magic. A large debug stack is composed of
++ * multiple exception stack entries, which we
++ * iterate through now. Dont look:
++ */
++ do {
++ ++j;
++ end -= EXCEPTION_STKSZ;
++ ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
++ } while (stack < end - EXCEPTION_STKSZ);
++ if (*usedp & (1U << j))
++ break;
++ *usedp |= 1U << j;
++ *idp = ids[j];
++ return (unsigned long *)end;
++ }
++#endif
++ }
++#endif
++ return NULL;
++}
++
++static int show_trace_unwind(struct unwind_frame_info *info, void *context)
++{
++ int n = 0;
++
++ while (unwind(info) == 0 && UNW_PC(info)) {
++ n++;
++ printk_address(UNW_PC(info));
++ if (arch_unw_user_mode(info))
++ break;
++ }
++ return n;
++}
++
++/*
++ * x86-64 can have upto three kernel stacks:
++ * process stack
++ * interrupt stack
++ * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
++ */
++
++void show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * stack)
++{
++ const unsigned cpu = safe_smp_processor_id();
++ unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
++ unsigned used = 0;
++
++ printk("\nCall Trace:\n");
++
++ if (!tsk)
++ tsk = current;
++
++ if (call_trace >= 0) {
++ int unw_ret = 0;
++ struct unwind_frame_info info;
++
++ if (regs) {
++ if (unwind_init_frame_info(&info, tsk, regs) == 0)
++ unw_ret = show_trace_unwind(&info, NULL);
++ } else if (tsk == current)
++ unw_ret = unwind_init_running(&info, show_trace_unwind, NULL);
++ else {
++ if (unwind_init_blocked(&info, tsk) == 0)
++ unw_ret = show_trace_unwind(&info, NULL);
++ }
++ if (unw_ret > 0) {
++ if (call_trace == 1 && !arch_unw_user_mode(&info)) {
++ print_symbol("DWARF2 unwinder stuck at %s\n",
++ UNW_PC(&info));
++ if ((long)UNW_SP(&info) < 0) {
++ printk("Leftover inexact backtrace:\n");
++ stack = (unsigned long *)UNW_SP(&info);
++ } else
++ printk("Full inexact backtrace again:\n");
++ } else if (call_trace >= 1)
++ return;
++ else
++ printk("Full inexact backtrace again:\n");
++ } else
++ printk("Inexact backtrace:\n");
++ }
++
++ /*
++ * Print function call entries within a stack. 'cond' is the
++ * "end of stackframe" condition, that the 'stack++'
++ * iteration will eventually trigger.
++ */
++#define HANDLE_STACK(cond) \
++ do while (cond) { \
++ unsigned long addr = *stack++; \
++ if (kernel_text_address(addr)) { \
++ /* \
++ * If the address is either in the text segment of the \
++ * kernel, or in the region which contains vmalloc'ed \
++ * memory, it *may* be the address of a calling \
++ * routine; if so, print it so that someone tracing \
++ * down the cause of the crash will be able to figure \
++ * out the call path that was taken. \
++ */ \
++ printk_address(addr); \
++ } \
++ } while (0)
++
++ /*
++ * Print function call entries in all stacks, starting at the
++ * current stack address. If the stacks consist of nested
++ * exceptions
++ */
++ for ( ; ; ) {
++ const char *id;
++ unsigned long *estack_end;
++ estack_end = in_exception_stack(cpu, (unsigned long)stack,
++ &used, &id);
++
++ if (estack_end) {
++ printk(" <%s>", id);
++ HANDLE_STACK (stack < estack_end);
++ printk(" <EOE>");
++ /*
++ * We link to the next stack via the
++ * second-to-last pointer (index -2 to end) in the
++ * exception stack:
++ */
++ stack = (unsigned long *) estack_end[-2];
++ continue;
++ }
++ if (irqstack_end) {
++ unsigned long *irqstack;
++ irqstack = irqstack_end -
++ (IRQSTACKSIZE - 64) / sizeof(*irqstack);
++
++ if (stack >= irqstack && stack < irqstack_end) {
++ printk(" <IRQ>");
++ HANDLE_STACK (stack < irqstack_end);
++ /*
++ * We link to the next stack (which would be
++ * the process stack normally) the last
++ * pointer (index -1 to end) in the IRQ stack:
++ */
++ stack = (unsigned long *) (irqstack_end[-1]);
++ irqstack_end = NULL;
++ printk(" <EOI>");
++ continue;
++ }
++ }
++ break;
++ }
++
++ /*
++ * This prints the process stack:
++ */
++ HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
++#undef HANDLE_STACK
++
++ printk("\n");
++}
++
++static void _show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long * rsp)
++{
++ unsigned long *stack;
++ int i;
++ const int cpu = safe_smp_processor_id();
++ unsigned long *irqstack_end = (unsigned long *) (cpu_pda(cpu)->irqstackptr);
++ unsigned long *irqstack = (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
++
++ // debugging aid: "show_stack(NULL, NULL);" prints the
++ // back trace for this cpu.
++
++ if (rsp == NULL) {
++ if (tsk)
++ rsp = (unsigned long *)tsk->thread.rsp;
++ else
++ rsp = (unsigned long *)&rsp;
++ }
++
++ stack = rsp;
++ for(i=0; i < kstack_depth_to_print; i++) {
++ if (stack >= irqstack && stack <= irqstack_end) {
++ if (stack == irqstack_end) {
++ stack = (unsigned long *) (irqstack_end[-1]);
++ printk(" <EOI> ");
++ }
++ } else {
++ if (((long) stack & (THREAD_SIZE-1)) == 0)
++ break;
++ }
++ if (i && ((i % 4) == 0))
++ printk("\n");
++ printk(" %016lx", *stack++);
++ touch_nmi_watchdog();
++ }
++ show_trace(tsk, regs, rsp);
++}
++
++void show_stack(struct task_struct *tsk, unsigned long * rsp)
++{
++ _show_stack(tsk, NULL, rsp);
++}
++
++/*
++ * The architecture-independent dump_stack generator
++ */
++void dump_stack(void)
++{
++ unsigned long dummy;
++ show_trace(NULL, NULL, &dummy);
++}
++
++EXPORT_SYMBOL(dump_stack);
++
++void show_registers(struct pt_regs *regs)
++{
++ int i;
++ int in_kernel = !user_mode(regs);
++ unsigned long rsp;
++ const int cpu = safe_smp_processor_id();
++ struct task_struct *cur = cpu_pda(cpu)->pcurrent;
++
++ rsp = regs->rsp;
++
++ printk("CPU %d ", cpu);
++ __show_regs(regs);
++ printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
++ cur->comm, cur->pid, task_thread_info(cur), cur);
++
++ /*
++ * When in-kernel, we also print out the stack and code at the
++ * time of the fault..
++ */
++ if (in_kernel) {
++
++ printk("Stack: ");
++ _show_stack(NULL, regs, (unsigned long*)rsp);
++
++ printk("\nCode: ");
++ if (regs->rip < PAGE_OFFSET)
++ goto bad;
++
++ for (i=0; i<20; i++) {
++ unsigned char c;
++ if (__get_user(c, &((unsigned char*)regs->rip)[i])) {
++bad:
++ printk(" Bad RIP value.");
++ break;
++ }
++ printk("%02x ", c);
++ }
++ }
++ printk("\n");
++}
++
++void handle_BUG(struct pt_regs *regs)
++{
++ struct bug_frame f;
++ long len;
++ const char *prefix = "";
++
++ if (user_mode(regs))
++ return;
++ if (__copy_from_user(&f, (const void __user *) regs->rip,
++ sizeof(struct bug_frame)))
++ return;
++ if (f.filename >= 0 ||
++ f.ud2[0] != 0x0f || f.ud2[1] != 0x0b)
++ return;
++ len = __strnlen_user((char *)(long)f.filename, PATH_MAX) - 1;
++ if (len < 0 || len >= PATH_MAX)
++ f.filename = (int)(long)"unmapped filename";
++ else if (len > 50) {
++ f.filename += len - 50;
++ prefix = "...";
++ }
++ printk("----------- [cut here ] --------- [please bite here ] ---------\n");
++ printk(KERN_ALERT "Kernel BUG at %s%.50s:%d\n", prefix, (char *)(long)f.filename, f.line);
++}
++
++#ifdef CONFIG_BUG
++void out_of_line_bug(void)
++{
++ BUG();
++}
++EXPORT_SYMBOL(out_of_line_bug);
++#endif
++
++static DEFINE_SPINLOCK(die_lock);
++static int die_owner = -1;
++static unsigned int die_nest_count;
++
++unsigned __kprobes long oops_begin(void)
++{
++ int cpu = safe_smp_processor_id();
++ unsigned long flags;
++
++ /* racy, but better than risking deadlock. */
++ local_irq_save(flags);
++ if (!spin_trylock(&die_lock)) {
++ if (cpu == die_owner)
++ /* nested oops. should stop eventually */;
++ else
++ spin_lock(&die_lock);
++ }
++ die_nest_count++;
++ die_owner = cpu;
++ console_verbose();
++ bust_spinlocks(1);
++ return flags;
++}
++
++void __kprobes oops_end(unsigned long flags)
++{
++ die_owner = -1;
++ bust_spinlocks(0);
++ die_nest_count--;
++ if (die_nest_count)
++ /* We still own the lock */
++ local_irq_restore(flags);
++ else
++ /* Nest count reaches zero, release the lock. */
++ spin_unlock_irqrestore(&die_lock, flags);
++ if (panic_on_oops)
++ panic("Fatal exception");
++}
++
++void __kprobes __die(const char * str, struct pt_regs * regs, long err)
++{
++ static int die_counter;
++ printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff,++die_counter);
++#ifdef CONFIG_PREEMPT
++ printk("PREEMPT ");
++#endif
++#ifdef CONFIG_SMP
++ printk("SMP ");
++#endif
++#ifdef CONFIG_DEBUG_PAGEALLOC
++ printk("DEBUG_PAGEALLOC");
++#endif
++ printk("\n");
++ notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV);
++ show_registers(regs);
++ /* Executive summary in case the oops scrolled away */
++ printk(KERN_ALERT "RIP ");
++ printk_address(regs->rip);
++ printk(" RSP <%016lx>\n", regs->rsp);
++ if (kexec_should_crash(current))
++ crash_kexec(regs);
++}
++
++void die(const char * str, struct pt_regs * regs, long err)
++{
++ unsigned long flags = oops_begin();
++
++ handle_BUG(regs);
++ __die(str, regs, err);
++ oops_end(flags);
++ do_exit(SIGSEGV);
++}
++
++#ifdef CONFIG_X86_LOCAL_APIC
++void __kprobes die_nmi(char *str, struct pt_regs *regs)
++{
++ unsigned long flags = oops_begin();
++
++ /*
++ * We are in trouble anyway, lets at least try
++ * to get a message out.
++ */
++ printk(str, safe_smp_processor_id());
++ show_registers(regs);
++ if (kexec_should_crash(current))
++ crash_kexec(regs);
++ if (panic_on_timeout || panic_on_oops)
++ panic("nmi watchdog");
++ printk("console shuts up ...\n");
++ oops_end(flags);
++ nmi_exit();
++ local_irq_enable();
++ do_exit(SIGSEGV);
++}
++#endif
++
++static void __kprobes do_trap(int trapnr, int signr, char *str,
++ struct pt_regs * regs, long error_code,
++ siginfo_t *info)
++{
++ struct task_struct *tsk = current;
++
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
++
++ if (user_mode(regs)) {
++ if (exception_trace && unhandled_signal(tsk, signr))
++ printk(KERN_INFO
++ "%s[%d] trap %s rip:%lx rsp:%lx error:%lx\n",
++ tsk->comm, tsk->pid, str,
++ regs->rip, regs->rsp, error_code);
++
++ if (info)
++ force_sig_info(signr, info, tsk);
++ else
++ force_sig(signr, tsk);
++ return;
++ }
++
++
++ /* kernel trap */
++ {
++ const struct exception_table_entry *fixup;
++ fixup = search_exception_tables(regs->rip);
++ if (fixup)
++ regs->rip = fixup->fixup;
++ else
++ die(str, regs, error_code);
++ return;
++ }
++}
++
++#define DO_ERROR(trapnr, signr, str, name) \
++asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
++{ \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ conditional_sti(regs); \
++ do_trap(trapnr, signr, str, regs, error_code, NULL); \
++}
++
++#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
++asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
++{ \
++ siginfo_t info; \
++ info.si_signo = signr; \
++ info.si_errno = 0; \
++ info.si_code = sicode; \
++ info.si_addr = (void __user *)siaddr; \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ conditional_sti(regs); \
++ do_trap(trapnr, signr, str, regs, error_code, &info); \
++}
++
++DO_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->rip)
++DO_ERROR( 4, SIGSEGV, "overflow", overflow)
++DO_ERROR( 5, SIGSEGV, "bounds", bounds)
++DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->rip)
++DO_ERROR( 7, SIGSEGV, "device not available", device_not_available)
++DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
++DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
++DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
++DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
++DO_ERROR(18, SIGSEGV, "reserved", reserved)
++
++/* Runs on IST stack */
++asmlinkage void do_stack_segment(struct pt_regs *regs, long error_code)
++{
++ if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
++ 12, SIGBUS) == NOTIFY_STOP)
++ return;
++ preempt_conditional_sti(regs);
++ do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
++ preempt_conditional_cli(regs);
++}
++
++asmlinkage void do_double_fault(struct pt_regs * regs, long error_code)
++{
++ static const char str[] = "double fault";
++ struct task_struct *tsk = current;
++
++ /* Return not checked because double check cannot be ignored */
++ notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
++
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 8;
++
++ /* This is always a kernel trap and never fixable (and thus must
++ never return). */
++ for (;;)
++ die(str, regs, error_code);
++}
++
++asmlinkage void __kprobes do_general_protection(struct pt_regs * regs,
++ long error_code)
++{
++ struct task_struct *tsk = current;
++
++ conditional_sti(regs);
++
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 13;
++
++ if (user_mode(regs)) {
++ if (exception_trace && unhandled_signal(tsk, SIGSEGV))
++ printk(KERN_INFO
++ "%s[%d] general protection rip:%lx rsp:%lx error:%lx\n",
++ tsk->comm, tsk->pid,
++ regs->rip, regs->rsp, error_code);
++
++ force_sig(SIGSEGV, tsk);
++ return;
++ }
++
++ /* kernel gp */
++ {
++ const struct exception_table_entry *fixup;
++ fixup = search_exception_tables(regs->rip);
++ if (fixup) {
++ regs->rip = fixup->fixup;
++ return;
++ }
++ if (notify_die(DIE_GPF, "general protection fault", regs,
++ error_code, 13, SIGSEGV) == NOTIFY_STOP)
++ return;
++ die("general protection fault", regs, error_code);
++ }
++}
++
++static __kprobes void
++mem_parity_error(unsigned char reason, struct pt_regs * regs)
++{
++ printk("Uhhuh. NMI received. Dazed and confused, but trying to continue\n");
++ printk("You probably have a hardware problem with your RAM chips\n");
++
++#if 0 /* XEN */
++ /* Clear and disable the memory parity error line. */
++ reason = (reason & 0xf) | 4;
++ outb(reason, 0x61);
++#endif /* XEN */
++}
++
++static __kprobes void
++io_check_error(unsigned char reason, struct pt_regs * regs)
++{
++ printk("NMI: IOCK error (debug interrupt?)\n");
++ show_registers(regs);
++
++#if 0 /* XEN */
++ /* Re-enable the IOCK line, wait for a few seconds */
++ reason = (reason & 0xf) | 8;
++ outb(reason, 0x61);
++ mdelay(2000);
++ reason &= ~8;
++ outb(reason, 0x61);
++#endif /* XEN */
++}
++
++static __kprobes void
++unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
++{ printk("Uhhuh. NMI received for unknown reason %02x.\n", reason);
++ printk("Dazed and confused, but trying to continue\n");
++ printk("Do you have a strange power saving mode enabled?\n");
++}
++
++/* Runs on IST stack. This code must keep interrupts off all the time.
++ Nested NMIs are prevented by the CPU. */
++asmlinkage __kprobes void default_do_nmi(struct pt_regs *regs)
++{
++ unsigned char reason = 0;
++ int cpu;
++
++ cpu = smp_processor_id();
++
++ /* Only the BSP gets external NMIs from the system. */
++ if (!cpu)
++ reason = get_nmi_reason();
++
++ if (!(reason & 0xc0)) {
++ if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
++ == NOTIFY_STOP)
++ return;
++#ifdef CONFIG_X86_LOCAL_APIC
++ /*
++ * Ok, so this is none of the documented NMI sources,
++ * so it must be the NMI watchdog.
++ */
++ if (nmi_watchdog > 0) {
++ nmi_watchdog_tick(regs,reason);
++ return;
++ }
++#endif
++ unknown_nmi_error(reason, regs);
++ return;
++ }
++ if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
++ return;
++
++ /* AK: following checks seem to be broken on modern chipsets. FIXME */
++
++ if (reason & 0x80)
++ mem_parity_error(reason, regs);
++ if (reason & 0x40)
++ io_check_error(reason, regs);
++}
++
++/* runs on IST stack. */
++asmlinkage void __kprobes do_int3(struct pt_regs * regs, long error_code)
++{
++ if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) == NOTIFY_STOP) {
++ return;
++ }
++ preempt_conditional_sti(regs);
++ do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
++ preempt_conditional_cli(regs);
++}
++
++/* Help handler running on IST stack to switch back to user stack
++ for scheduling or signal handling. The actual stack switch is done in
++ entry.S */
++asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
++{
++ struct pt_regs *regs = eregs;
++ /* Did already sync */
++ if (eregs == (struct pt_regs *)eregs->rsp)
++ ;
++ /* Exception from user space */
++ else if (user_mode(eregs))
++ regs = task_pt_regs(current);
++ /* Exception from kernel and interrupts are enabled. Move to
++ kernel process stack. */
++ else if (eregs->eflags & X86_EFLAGS_IF)
++ regs = (struct pt_regs *)(eregs->rsp -= sizeof(struct pt_regs));
++ if (eregs != regs)
++ *regs = *eregs;
++ return regs;
++}
++
++/* runs on IST stack. */
++asmlinkage void __kprobes do_debug(struct pt_regs * regs,
++ unsigned long error_code)
++{
++ unsigned long condition;
++ struct task_struct *tsk = current;
++ siginfo_t info;
++
++ get_debugreg(condition, 6);
++
++ if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
++ SIGTRAP) == NOTIFY_STOP)
++ return;
++
++ preempt_conditional_sti(regs);
++
++ /* Mask out spurious debug traps due to lazy DR7 setting */
++ if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
++ if (!tsk->thread.debugreg7) {
++ goto clear_dr7;
++ }
++ }
++
++ tsk->thread.debugreg6 = condition;
++
++ /* Mask out spurious TF errors due to lazy TF clearing */
++ if (condition & DR_STEP) {
++ /*
++ * The TF error should be masked out only if the current
++ * process is not traced and if the TRAP flag has been set
++ * previously by a tracing process (condition detected by
++ * the PT_DTRACE flag); remember that the i386 TRAP flag
++ * can be modified by the process itself in user mode,
++ * allowing programs to debug themselves without the ptrace()
++ * interface.
++ */
++ if (!user_mode(regs))
++ goto clear_TF_reenable;
++ /*
++ * Was the TF flag set by a debugger? If so, clear it now,
++ * so that register information is correct.
++ */
++ if (tsk->ptrace & PT_DTRACE) {
++ regs->eflags &= ~TF_MASK;
++ tsk->ptrace &= ~PT_DTRACE;
++ }
++ }
++
++ /* Ok, finally something we can handle */
++ tsk->thread.trap_no = 1;
++ tsk->thread.error_code = error_code;
++ info.si_signo = SIGTRAP;
++ info.si_errno = 0;
++ info.si_code = TRAP_BRKPT;
++ info.si_addr = user_mode(regs) ? (void __user *)regs->rip : NULL;
++ force_sig_info(SIGTRAP, &info, tsk);
++
++clear_dr7:
++ set_debugreg(0UL, 7);
++ preempt_conditional_cli(regs);
++ return;
++
++clear_TF_reenable:
++ set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
++ regs->eflags &= ~TF_MASK;
++ preempt_conditional_cli(regs);
++}
++
++static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
++{
++ const struct exception_table_entry *fixup;
++ fixup = search_exception_tables(regs->rip);
++ if (fixup) {
++ regs->rip = fixup->fixup;
++ return 1;
++ }
++ notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
++ /* Illegal floating point operation in the kernel */
++ current->thread.trap_no = trapnr;
++ die(str, regs, 0);
++ return 0;
++}
++
++/*
++ * Note that we play around with the 'TS' bit in an attempt to get
++ * the correct behaviour even in the presence of the asynchronous
++ * IRQ13 behaviour
++ */
++asmlinkage void do_coprocessor_error(struct pt_regs *regs)
++{
++ void __user *rip = (void __user *)(regs->rip);
++ struct task_struct * task;
++ siginfo_t info;
++ unsigned short cwd, swd;
++
++ conditional_sti(regs);
++ if (!user_mode(regs) &&
++ kernel_math_error(regs, "kernel x87 math error", 16))
++ return;
++
++ /*
++ * Save the info for the exception handler and clear the error.
++ */
++ task = current;
++ save_init_fpu(task);
++ task->thread.trap_no = 16;
++ task->thread.error_code = 0;
++ info.si_signo = SIGFPE;
++ info.si_errno = 0;
++ info.si_code = __SI_FAULT;
++ info.si_addr = rip;
++ /*
++ * (~cwd & swd) will mask out exceptions that are not set to unmasked
++ * status. 0x3f is the exception bits in these regs, 0x200 is the
++ * C1 reg you need in case of a stack fault, 0x040 is the stack
++ * fault bit. We should only be taking one exception at a time,
++ * so if this combination doesn't produce any single exception,
++ * then we have a bad program that isn't synchronizing its FPU usage
++ * and it will suffer the consequences since we won't be able to
++ * fully reproduce the context of the exception
++ */
++ cwd = get_fpu_cwd(task);
++ swd = get_fpu_swd(task);
++ switch (swd & ~cwd & 0x3f) {
++ case 0x000:
++ default:
++ break;
++ case 0x001: /* Invalid Op */
++ /*
++ * swd & 0x240 == 0x040: Stack Underflow
++ * swd & 0x240 == 0x240: Stack Overflow
++ * User must clear the SF bit (0x40) if set
++ */
++ info.si_code = FPE_FLTINV;
++ break;
++ case 0x002: /* Denormalize */
++ case 0x010: /* Underflow */
++ info.si_code = FPE_FLTUND;
++ break;
++ case 0x004: /* Zero Divide */
++ info.si_code = FPE_FLTDIV;
++ break;
++ case 0x008: /* Overflow */
++ info.si_code = FPE_FLTOVF;
++ break;
++ case 0x020: /* Precision */
++ info.si_code = FPE_FLTRES;
++ break;
++ }
++ force_sig_info(SIGFPE, &info, task);
++}
++
++asmlinkage void bad_intr(void)
++{
++ printk("bad interrupt");
++}
++
++asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
++{
++ void __user *rip = (void __user *)(regs->rip);
++ struct task_struct * task;
++ siginfo_t info;
++ unsigned short mxcsr;
++
++ conditional_sti(regs);
++ if (!user_mode(regs) &&
++ kernel_math_error(regs, "kernel simd math error", 19))
++ return;
++
++ /*
++ * Save the info for the exception handler and clear the error.
++ */
++ task = current;
++ save_init_fpu(task);
++ task->thread.trap_no = 19;
++ task->thread.error_code = 0;
++ info.si_signo = SIGFPE;
++ info.si_errno = 0;
++ info.si_code = __SI_FAULT;
++ info.si_addr = rip;
++ /*
++ * The SIMD FPU exceptions are handled a little differently, as there
++ * is only a single status/control register. Thus, to determine which
++ * unmasked exception was caught we must mask the exception mask bits
++ * at 0x1f80, and then use these to mask the exception bits at 0x3f.
++ */
++ mxcsr = get_fpu_mxcsr(task);
++ switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
++ case 0x000:
++ default:
++ break;
++ case 0x001: /* Invalid Op */
++ info.si_code = FPE_FLTINV;
++ break;
++ case 0x002: /* Denormalize */
++ case 0x010: /* Underflow */
++ info.si_code = FPE_FLTUND;
++ break;
++ case 0x004: /* Zero Divide */
++ info.si_code = FPE_FLTDIV;
++ break;
++ case 0x008: /* Overflow */
++ info.si_code = FPE_FLTOVF;
++ break;
++ case 0x020: /* Precision */
++ info.si_code = FPE_FLTRES;
++ break;
++ }
++ force_sig_info(SIGFPE, &info, task);
++}
++
++asmlinkage void do_spurious_interrupt_bug(struct pt_regs * regs)
++{
++}
++
++#if 0
++asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
++{
++}
++#endif
++
++asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
++{
++}
++
++/*
++ * 'math_state_restore()' saves the current math information in the
++ * old math state array, and gets the new ones from the current task
++ *
++ * Careful.. There are problems with IBM-designed IRQ13 behaviour.
++ * Don't touch unless you *really* know how it works.
++ */
++asmlinkage void math_state_restore(void)
++{
++ struct task_struct *me = current;
++ /* clts(); */ /* 'clts' is done for us by Xen during virtual trap. */
++
++ if (!used_math())
++ init_fpu(me);
++ restore_fpu_checking(&me->thread.i387.fxsave);
++ task_thread_info(me)->status |= TS_USEDFPU;
++}
++
++
++/*
++ * NB. All these are "interrupt gates" (i.e. events_mask is set) because we
++ * specify <dpl>|4 in the second field.
++ */
++static trap_info_t __cpuinitdata trap_table[] = {
++ { 0, 0|4, __KERNEL_CS, (unsigned long)divide_error },
++ { 1, 0|4, __KERNEL_CS, (unsigned long)debug },
++ { 3, 3|4, __KERNEL_CS, (unsigned long)int3 },
++ { 4, 3|4, __KERNEL_CS, (unsigned long)overflow },
++ { 5, 0|4, __KERNEL_CS, (unsigned long)bounds },
++ { 6, 0|4, __KERNEL_CS, (unsigned long)invalid_op },
++ { 7, 0|4, __KERNEL_CS, (unsigned long)device_not_available },
++ { 9, 0|4, __KERNEL_CS, (unsigned long)coprocessor_segment_overrun},
++ { 10, 0|4, __KERNEL_CS, (unsigned long)invalid_TSS },
++ { 11, 0|4, __KERNEL_CS, (unsigned long)segment_not_present },
++ { 12, 0|4, __KERNEL_CS, (unsigned long)stack_segment },
++ { 13, 0|4, __KERNEL_CS, (unsigned long)general_protection },
++ { 14, 0|4, __KERNEL_CS, (unsigned long)page_fault },
++ { 15, 0|4, __KERNEL_CS, (unsigned long)spurious_interrupt_bug },
++ { 16, 0|4, __KERNEL_CS, (unsigned long)coprocessor_error },
++ { 17, 0|4, __KERNEL_CS, (unsigned long)alignment_check },
++#ifdef CONFIG_X86_MCE
++ { 18, 0|4, __KERNEL_CS, (unsigned long)machine_check },
++#endif
++ { 19, 0|4, __KERNEL_CS, (unsigned long)simd_coprocessor_error },
++#ifdef CONFIG_IA32_EMULATION
++ { IA32_SYSCALL_VECTOR, 3, __KERNEL_CS, (unsigned long)ia32_syscall},
++#endif
++ { 0, 0, 0, 0 }
++};
++
++void __init trap_init(void)
++{
++ int ret;
++
++ ret = HYPERVISOR_set_trap_table(trap_table);
++ if (ret)
++ printk("HYPERVISOR_set_trap_table failed: error %d\n", ret);
++
++ /*
++ * Should be a barrier for any external CPU state.
++ */
++ cpu_init();
++}
++
++void __cpuinit smp_trap_init(trap_info_t *trap_ctxt)
++{
++ const trap_info_t *t = trap_table;
++
++ for (t = trap_table; t->address; t++) {
++ trap_ctxt[t->vector].flags = t->flags;
++ trap_ctxt[t->vector].cs = t->cs;
++ trap_ctxt[t->vector].address = t->address;
++ }
++}
++
++
++/* Actual parsing is done early in setup.c. */
++static int __init oops_dummy(char *s)
++{
++ panic_on_oops = 1;
++ return 1;
++}
++__setup("oops=", oops_dummy);
++
++static int __init kstack_setup(char *s)
++{
++ kstack_depth_to_print = simple_strtoul(s,NULL,0);
++ return 1;
++}
++__setup("kstack=", kstack_setup);
++
++#ifdef CONFIG_STACK_UNWIND
++static int __init call_trace_setup(char *s)
++{
++ if (strcmp(s, "old") == 0)
++ call_trace = -1;
++ else if (strcmp(s, "both") == 0)
++ call_trace = 0;
++ else if (strcmp(s, "newfallback") == 0)
++ call_trace = 1;
++ else if (strcmp(s, "new") == 0)
++ call_trace = 2;
++ return 1;
++}
++__setup("call_trace=", call_trace_setup);
++#endif
+Index: head-2008-11-25/arch/x86/kernel/vsyscall_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/vsyscall_64-xen.c 2007-06-18 08:38:13.000000000 +0200
+@@ -0,0 +1,227 @@
++/*
++ * linux/arch/x86_64/kernel/vsyscall.c
++ *
++ * Copyright (C) 2001 Andrea Arcangeli <andrea@suse.de> SuSE
++ * Copyright 2003 Andi Kleen, SuSE Labs.
++ *
++ * Thanks to hpa@transmeta.com for some useful hint.
++ * Special thanks to Ingo Molnar for his early experience with
++ * a different vsyscall implementation for Linux/IA32 and for the name.
++ *
++ * vsyscall 1 is located at -10Mbyte, vsyscall 2 is located
++ * at virtual address -10Mbyte+1024bytes etc... There are at max 4
++ * vsyscalls. One vsyscall can reserve more than 1 slot to avoid
++ * jumping out of line if necessary. We cannot add more with this
++ * mechanism because older kernels won't return -ENOSYS.
++ * If we want more than four we need a vDSO.
++ *
++ * Note: the concept clashes with user mode linux. If you use UML and
++ * want per guest time just set the kernel.vsyscall64 sysctl to 0.
++ */
++
++#include <linux/time.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/timer.h>
++#include <linux/seqlock.h>
++#include <linux/jiffies.h>
++#include <linux/sysctl.h>
++
++#include <asm/vsyscall.h>
++#include <asm/pgtable.h>
++#include <asm/page.h>
++#include <asm/fixmap.h>
++#include <asm/errno.h>
++#include <asm/io.h>
++
++#define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
++
++int __sysctl_vsyscall __section_sysctl_vsyscall = 1;
++seqlock_t __xtime_lock __section_xtime_lock = SEQLOCK_UNLOCKED;
++
++#include <asm/unistd.h>
++
++static __always_inline void timeval_normalize(struct timeval * tv)
++{
++ time_t __sec;
++
++ __sec = tv->tv_usec / 1000000;
++ if (__sec) {
++ tv->tv_usec %= 1000000;
++ tv->tv_sec += __sec;
++ }
++}
++
++static __always_inline void do_vgettimeofday(struct timeval * tv)
++{
++ long sequence, t;
++ unsigned long sec, usec;
++
++ do {
++ sequence = read_seqbegin(&__xtime_lock);
++
++ sec = __xtime.tv_sec;
++ usec = (__xtime.tv_nsec / 1000) +
++ (__jiffies - __wall_jiffies) * (1000000 / HZ);
++
++ if (__vxtime.mode != VXTIME_HPET) {
++ t = get_cycles_sync();
++ if (t < __vxtime.last_tsc)
++ t = __vxtime.last_tsc;
++ usec += ((t - __vxtime.last_tsc) *
++ __vxtime.tsc_quot) >> 32;
++ /* See comment in x86_64 do_gettimeofday. */
++ } else {
++ usec += ((readl((void *)fix_to_virt(VSYSCALL_HPET) + 0xf0) -
++ __vxtime.last) * __vxtime.quot) >> 32;
++ }
++ } while (read_seqretry(&__xtime_lock, sequence));
++
++ tv->tv_sec = sec + usec / 1000000;
++ tv->tv_usec = usec % 1000000;
++}
++
++/* RED-PEN may want to readd seq locking, but then the variable should be write-once. */
++static __always_inline void do_get_tz(struct timezone * tz)
++{
++ *tz = __sys_tz;
++}
++
++static __always_inline int gettimeofday(struct timeval *tv, struct timezone *tz)
++{
++ int ret;
++ asm volatile("vsysc2: syscall"
++ : "=a" (ret)
++ : "0" (__NR_gettimeofday),"D" (tv),"S" (tz) : __syscall_clobber );
++ return ret;
++}
++
++static __always_inline long time_syscall(long *t)
++{
++ long secs;
++ asm volatile("vsysc1: syscall"
++ : "=a" (secs)
++ : "0" (__NR_time),"D" (t) : __syscall_clobber);
++ return secs;
++}
++
++int __vsyscall(0) vgettimeofday(struct timeval * tv, struct timezone * tz)
++{
++ if (!__sysctl_vsyscall)
++ return gettimeofday(tv,tz);
++ if (tv)
++ do_vgettimeofday(tv);
++ if (tz)
++ do_get_tz(tz);
++ return 0;
++}
++
++/* This will break when the xtime seconds get inaccurate, but that is
++ * unlikely */
++time_t __vsyscall(1) vtime(time_t *t)
++{
++ if (!__sysctl_vsyscall)
++ return time_syscall(t);
++ else if (t)
++ *t = __xtime.tv_sec;
++ return __xtime.tv_sec;
++}
++
++long __vsyscall(2) venosys_0(void)
++{
++ return -ENOSYS;
++}
++
++long __vsyscall(3) venosys_1(void)
++{
++ return -ENOSYS;
++}
++
++#ifdef CONFIG_SYSCTL
++
++#define SYSCALL 0x050f
++#define NOP2 0x9090
++
++/*
++ * NOP out syscall in vsyscall page when not needed.
++ */
++static int vsyscall_sysctl_change(ctl_table *ctl, int write, struct file * filp,
++ void __user *buffer, size_t *lenp, loff_t *ppos)
++{
++ extern u16 vsysc1, vsysc2;
++ u16 *map1, *map2;
++ int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
++ if (!write)
++ return ret;
++ /* gcc has some trouble with __va(__pa()), so just do it this
++ way. */
++ map1 = ioremap(__pa_symbol(&vsysc1), 2);
++ if (!map1)
++ return -ENOMEM;
++ map2 = ioremap(__pa_symbol(&vsysc2), 2);
++ if (!map2) {
++ ret = -ENOMEM;
++ goto out;
++ }
++ if (!sysctl_vsyscall) {
++ *map1 = SYSCALL;
++ *map2 = SYSCALL;
++ } else {
++ *map1 = NOP2;
++ *map2 = NOP2;
++ }
++ iounmap(map2);
++out:
++ iounmap(map1);
++ return ret;
++}
++
++static int vsyscall_sysctl_nostrat(ctl_table *t, int __user *name, int nlen,
++ void __user *oldval, size_t __user *oldlenp,
++ void __user *newval, size_t newlen,
++ void **context)
++{
++ return -ENOSYS;
++}
++
++static ctl_table kernel_table2[] = {
++ { .ctl_name = 99, .procname = "vsyscall64",
++ .data = &sysctl_vsyscall, .maxlen = sizeof(int), .mode = 0644,
++ .strategy = vsyscall_sysctl_nostrat,
++ .proc_handler = vsyscall_sysctl_change },
++ { 0, }
++};
++
++static ctl_table kernel_root_table2[] = {
++ { .ctl_name = CTL_KERN, .procname = "kernel", .mode = 0555,
++ .child = kernel_table2 },
++ { 0 },
++};
++
++#endif
++
++static void __init map_vsyscall(void)
++{
++ extern char __vsyscall_0;
++ unsigned long physaddr_page0 = __pa_symbol(&__vsyscall_0);
++
++ __set_fixmap(VSYSCALL_FIRST_PAGE, physaddr_page0, PAGE_KERNEL_VSYSCALL);
++}
++
++static int __init vsyscall_init(void)
++{
++ BUG_ON(((unsigned long) &vgettimeofday !=
++ VSYSCALL_ADDR(__NR_vgettimeofday)));
++ BUG_ON((unsigned long) &vtime != VSYSCALL_ADDR(__NR_vtime));
++ BUG_ON((VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE)));
++ map_vsyscall();
++#ifdef CONFIG_XEN
++ sysctl_vsyscall = 0; /* disable vgettimeofay() */
++#endif
++#ifdef CONFIG_SYSCTL
++ register_sysctl_table(kernel_root_table2, 0);
++#endif
++ return 0;
++}
++
++__initcall(vsyscall_init);
+Index: head-2008-11-25/arch/x86/kernel/xen_entry_64.S
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/kernel/xen_entry_64.S 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,36 @@
++/*
++ * Copied from arch/xen/i386/kernel/entry.S
++ */
++/* Offsets into shared_info_t. */
++#define evtchn_upcall_pending /* 0 */
++#define evtchn_upcall_mask 1
++
++#define sizeof_vcpu_shift 6
++
++#ifdef CONFIG_SMP
++//#define preempt_disable(reg) incl threadinfo_preempt_count(reg)
++//#define preempt_enable(reg) decl threadinfo_preempt_count(reg)
++#define preempt_disable(reg)
++#define preempt_enable(reg)
++#define XEN_GET_VCPU_INFO(reg) preempt_disable(%rbp) ; \
++ movq %gs:pda_cpunumber,reg ; \
++ shl $32, reg ; \
++ shr $32-sizeof_vcpu_shift,reg ; \
++ addq HYPERVISOR_shared_info,reg
++#define XEN_PUT_VCPU_INFO(reg) preempt_enable(%rbp) ; \
++#define XEN_PUT_VCPU_INFO_fixup .byte 0xff,0xff,0xff
++#else
++#define XEN_GET_VCPU_INFO(reg) movq HYPERVISOR_shared_info,reg
++#define XEN_PUT_VCPU_INFO(reg)
++#define XEN_PUT_VCPU_INFO_fixup
++#endif
++
++#define XEN_LOCKED_BLOCK_EVENTS(reg) movb $1,evtchn_upcall_mask(reg)
++#define XEN_LOCKED_UNBLOCK_EVENTS(reg) movb $0,evtchn_upcall_mask(reg)
++#define XEN_BLOCK_EVENTS(reg) XEN_GET_VCPU_INFO(reg) ; \
++ XEN_LOCKED_BLOCK_EVENTS(reg) ; \
++ XEN_PUT_VCPU_INFO(reg)
++#define XEN_UNBLOCK_EVENTS(reg) XEN_GET_VCPU_INFO(reg) ; \
++ XEN_LOCKED_UNBLOCK_EVENTS(reg) ; \
++ XEN_PUT_VCPU_INFO(reg)
++#define XEN_TEST_PENDING(reg) testb $0xFF,evtchn_upcall_pending(reg)
+Index: head-2008-11-25/arch/x86/mm/fault_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/fault_64-xen.c 2007-11-02 17:34:23.000000000 +0100
+@@ -0,0 +1,724 @@
++/*
++ * linux/arch/x86-64/mm/fault.c
++ *
++ * Copyright (C) 1995 Linus Torvalds
++ * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs.
++ */
++
++#include <linux/signal.h>
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/types.h>
++#include <linux/ptrace.h>
++#include <linux/mman.h>
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/smp_lock.h>
++#include <linux/interrupt.h>
++#include <linux/init.h>
++#include <linux/tty.h>
++#include <linux/vt_kern.h> /* For unblank_screen() */
++#include <linux/compiler.h>
++#include <linux/module.h>
++#include <linux/kprobes.h>
++
++#include <asm/system.h>
++#include <asm/uaccess.h>
++#include <asm/pgalloc.h>
++#include <asm/smp.h>
++#include <asm/tlbflush.h>
++#include <asm/proto.h>
++#include <asm/kdebug.h>
++#include <asm-generic/sections.h>
++
++/* Page fault error code bits */
++#define PF_PROT (1<<0) /* or no page found */
++#define PF_WRITE (1<<1)
++#define PF_USER (1<<2)
++#define PF_RSVD (1<<3)
++#define PF_INSTR (1<<4)
++
++#ifdef CONFIG_KPROBES
++ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
++
++/* Hook to register for page fault notifications */
++int register_page_fault_notifier(struct notifier_block *nb)
++{
++ vmalloc_sync_all();
++ return atomic_notifier_chain_register(¬ify_page_fault_chain, nb);
++}
++
++int unregister_page_fault_notifier(struct notifier_block *nb)
++{
++ return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb);
++}
++
++static inline int notify_page_fault(enum die_val val, const char *str,
++ struct pt_regs *regs, long err, int trap, int sig)
++{
++ struct die_args args = {
++ .regs = regs,
++ .str = str,
++ .err = err,
++ .trapnr = trap,
++ .signr = sig
++ };
++ return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args);
++}
++#else
++static inline int notify_page_fault(enum die_val val, const char *str,
++ struct pt_regs *regs, long err, int trap, int sig)
++{
++ return NOTIFY_DONE;
++}
++#endif
++
++void bust_spinlocks(int yes)
++{
++ int loglevel_save = console_loglevel;
++ if (yes) {
++ oops_in_progress = 1;
++ } else {
++#ifdef CONFIG_VT
++ unblank_screen();
++#endif
++ oops_in_progress = 0;
++ /*
++ * OK, the message is on the console. Now we call printk()
++ * without oops_in_progress set so that printk will give klogd
++ * a poke. Hold onto your hats...
++ */
++ console_loglevel = 15; /* NMI oopser may have shut the console up */
++ printk(" ");
++ console_loglevel = loglevel_save;
++ }
++}
++
++/* Sometimes the CPU reports invalid exceptions on prefetch.
++ Check that here and ignore.
++ Opcode checker based on code by Richard Brunner */
++static noinline int is_prefetch(struct pt_regs *regs, unsigned long addr,
++ unsigned long error_code)
++{
++ unsigned char *instr;
++ int scan_more = 1;
++ int prefetch = 0;
++ unsigned char *max_instr;
++
++ /* If it was a exec fault ignore */
++ if (error_code & PF_INSTR)
++ return 0;
++
++ instr = (unsigned char *)convert_rip_to_linear(current, regs);
++ max_instr = instr + 15;
++
++ if (user_mode(regs) && instr >= (unsigned char *)TASK_SIZE)
++ return 0;
++
++ while (scan_more && instr < max_instr) {
++ unsigned char opcode;
++ unsigned char instr_hi;
++ unsigned char instr_lo;
++
++ if (__get_user(opcode, instr))
++ break;
++
++ instr_hi = opcode & 0xf0;
++ instr_lo = opcode & 0x0f;
++ instr++;
++
++ switch (instr_hi) {
++ case 0x20:
++ case 0x30:
++ /* Values 0x26,0x2E,0x36,0x3E are valid x86
++ prefixes. In long mode, the CPU will signal
++ invalid opcode if some of these prefixes are
++ present so we will never get here anyway */
++ scan_more = ((instr_lo & 7) == 0x6);
++ break;
++
++ case 0x40:
++ /* In AMD64 long mode, 0x40 to 0x4F are valid REX prefixes
++ Need to figure out under what instruction mode the
++ instruction was issued ... */
++ /* Could check the LDT for lm, but for now it's good
++ enough to assume that long mode only uses well known
++ segments or kernel. */
++ scan_more = (!user_mode(regs)) || (regs->cs == __USER_CS);
++ break;
++
++ case 0x60:
++ /* 0x64 thru 0x67 are valid prefixes in all modes. */
++ scan_more = (instr_lo & 0xC) == 0x4;
++ break;
++ case 0xF0:
++ /* 0xF0, 0xF2, and 0xF3 are valid prefixes in all modes. */
++ scan_more = !instr_lo || (instr_lo>>1) == 1;
++ break;
++ case 0x00:
++ /* Prefetch instruction is 0x0F0D or 0x0F18 */
++ scan_more = 0;
++ if (__get_user(opcode, instr))
++ break;
++ prefetch = (instr_lo == 0xF) &&
++ (opcode == 0x0D || opcode == 0x18);
++ break;
++ default:
++ scan_more = 0;
++ break;
++ }
++ }
++ return prefetch;
++}
++
++static int bad_address(void *p)
++{
++ unsigned long dummy;
++ return __get_user(dummy, (unsigned long *)p);
++}
++
++void dump_pagetable(unsigned long address)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++
++ pgd = __va(read_cr3() & PHYSICAL_PAGE_MASK);
++ pgd += pgd_index(address);
++ if (bad_address(pgd)) goto bad;
++ printk("PGD %lx ", pgd_val(*pgd));
++ if (!pgd_present(*pgd)) goto ret;
++
++ pud = pud_offset(pgd, address);
++ if (bad_address(pud)) goto bad;
++ printk("PUD %lx ", pud_val(*pud));
++ if (!pud_present(*pud)) goto ret;
++
++ pmd = pmd_offset(pud, address);
++ if (bad_address(pmd)) goto bad;
++ printk("PMD %lx ", pmd_val(*pmd));
++ if (!pmd_present(*pmd)) goto ret;
++
++ pte = pte_offset_kernel(pmd, address);
++ if (bad_address(pte)) goto bad;
++ printk("PTE %lx", pte_val(*pte));
++ret:
++ printk("\n");
++ return;
++bad:
++ printk("BAD\n");
++}
++
++static const char errata93_warning[] =
++KERN_ERR "******* Your BIOS seems to not contain a fix for K8 errata #93\n"
++KERN_ERR "******* Working around it, but it may cause SEGVs or burn power.\n"
++KERN_ERR "******* Please consider a BIOS update.\n"
++KERN_ERR "******* Disabling USB legacy in the BIOS may also help.\n";
++
++/* Workaround for K8 erratum #93 & buggy BIOS.
++ BIOS SMM functions are required to use a specific workaround
++ to avoid corruption of the 64bit RIP register on C stepping K8.
++ A lot of BIOS that didn't get tested properly miss this.
++ The OS sees this as a page fault with the upper 32bits of RIP cleared.
++ Try to work around it here.
++ Note we only handle faults in kernel here. */
++
++static int is_errata93(struct pt_regs *regs, unsigned long address)
++{
++ static int warned;
++ if (address != regs->rip)
++ return 0;
++ if ((address >> 32) != 0)
++ return 0;
++ address |= 0xffffffffUL << 32;
++ if ((address >= (u64)_stext && address <= (u64)_etext) ||
++ (address >= MODULES_VADDR && address <= MODULES_END)) {
++ if (!warned) {
++ printk(errata93_warning);
++ warned = 1;
++ }
++ regs->rip = address;
++ return 1;
++ }
++ return 0;
++}
++
++int unhandled_signal(struct task_struct *tsk, int sig)
++{
++ if (tsk->pid == 1)
++ return 1;
++ if (tsk->ptrace & PT_PTRACED)
++ return 0;
++ return (tsk->sighand->action[sig-1].sa.sa_handler == SIG_IGN) ||
++ (tsk->sighand->action[sig-1].sa.sa_handler == SIG_DFL);
++}
++
++static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs,
++ unsigned long error_code)
++{
++ unsigned long flags = oops_begin();
++ struct task_struct *tsk;
++
++ printk(KERN_ALERT "%s: Corrupted page table at address %lx\n",
++ current->comm, address);
++ dump_pagetable(address);
++ tsk = current;
++ tsk->thread.cr2 = address;
++ tsk->thread.trap_no = 14;
++ tsk->thread.error_code = error_code;
++ __die("Bad pagetable", regs, error_code);
++ oops_end(flags);
++ do_exit(SIGKILL);
++}
++
++/*
++ * Handle a fault on the vmalloc area
++ *
++ * This assumes no large pages in there.
++ */
++static int vmalloc_fault(unsigned long address)
++{
++ pgd_t *pgd, *pgd_ref;
++ pud_t *pud, *pud_ref;
++ pmd_t *pmd, *pmd_ref;
++ pte_t *pte, *pte_ref;
++
++ /* Copy kernel mappings over when needed. This can also
++ happen within a race in page table update. In the later
++ case just flush. */
++
++ /* On Xen the line below does not always work. Needs investigating! */
++ /*pgd = pgd_offset(current->mm ?: &init_mm, address);*/
++ pgd = __va(read_cr3() & PHYSICAL_PAGE_MASK);
++ pgd += pgd_index(address);
++ pgd_ref = pgd_offset_k(address);
++ if (pgd_none(*pgd_ref))
++ return -1;
++ if (pgd_none(*pgd))
++ set_pgd(pgd, *pgd_ref);
++ else
++ BUG_ON(pgd_page(*pgd) != pgd_page(*pgd_ref));
++
++ /* Below here mismatches are bugs because these lower tables
++ are shared */
++
++ pud = pud_offset(pgd, address);
++ pud_ref = pud_offset(pgd_ref, address);
++ if (pud_none(*pud_ref))
++ return -1;
++ if (pud_none(*pud) || pud_page(*pud) != pud_page(*pud_ref))
++ BUG();
++ pmd = pmd_offset(pud, address);
++ pmd_ref = pmd_offset(pud_ref, address);
++ if (pmd_none(*pmd_ref))
++ return -1;
++ if (pmd_none(*pmd) || pmd_page(*pmd) != pmd_page(*pmd_ref))
++ BUG();
++ pte_ref = pte_offset_kernel(pmd_ref, address);
++ if (!pte_present(*pte_ref))
++ return -1;
++ pte = pte_offset_kernel(pmd, address);
++ /* Don't use pte_page here, because the mappings can point
++ outside mem_map, and the NUMA hash lookup cannot handle
++ that. */
++ if (!pte_present(*pte) || pte_pfn(*pte) != pte_pfn(*pte_ref))
++ BUG();
++ return 0;
++}
++
++int page_fault_trace = 0;
++int exception_trace = 1;
++
++
++#define MEM_VERBOSE 1
++
++#ifdef MEM_VERBOSE
++#define MEM_LOG(_f, _a...) \
++ printk("fault.c:[%d]-> " _f "\n", \
++ __LINE__ , ## _a )
++#else
++#define MEM_LOG(_f, _a...) ((void)0)
++#endif
++
++static int spurious_fault(struct pt_regs *regs,
++ unsigned long address,
++ unsigned long error_code)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++
++#ifdef CONFIG_XEN
++ /* Faults in hypervisor area are never spurious. */
++ if ((address >= HYPERVISOR_VIRT_START) &&
++ (address < HYPERVISOR_VIRT_END))
++ return 0;
++#endif
++
++ /* Reserved-bit violation or user access to kernel space? */
++ if (error_code & (PF_RSVD|PF_USER))
++ return 0;
++
++ pgd = init_mm.pgd + pgd_index(address);
++ if (!pgd_present(*pgd))
++ return 0;
++
++ pud = pud_offset(pgd, address);
++ if (!pud_present(*pud))
++ return 0;
++
++ pmd = pmd_offset(pud, address);
++ if (!pmd_present(*pmd))
++ return 0;
++
++ pte = pte_offset_kernel(pmd, address);
++ if (!pte_present(*pte))
++ return 0;
++ if ((error_code & PF_WRITE) && !pte_write(*pte))
++ return 0;
++ if ((error_code & PF_INSTR) && (__pte_val(*pte) & _PAGE_NX))
++ return 0;
++
++ return 1;
++}
++
++/*
++ * This routine handles page faults. It determines the address,
++ * and the problem, and then passes it off to one of the appropriate
++ * routines.
++ */
++asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
++ unsigned long error_code)
++{
++ struct task_struct *tsk;
++ struct mm_struct *mm;
++ struct vm_area_struct * vma;
++ unsigned long address;
++ const struct exception_table_entry *fixup;
++ int write;
++ unsigned long flags;
++ siginfo_t info;
++
++ if (!user_mode(regs))
++ error_code &= ~PF_USER; /* means kernel */
++
++ tsk = current;
++ mm = tsk->mm;
++ prefetchw(&mm->mmap_sem);
++
++ /* get the address */
++ address = current_vcpu_info()->arch.cr2;
++
++ info.si_code = SEGV_MAPERR;
++
++
++ /*
++ * We fault-in kernel-space virtual memory on-demand. The
++ * 'reference' page table is init_mm.pgd.
++ *
++ * NOTE! We MUST NOT take any locks for this case. We may
++ * be in an interrupt or a critical region, and should
++ * only copy the information from the master page table,
++ * nothing more.
++ *
++ * This verifies that the fault happens in kernel space
++ * (error_code & 4) == 0, and that the fault was not a
++ * protection error (error_code & 9) == 0.
++ */
++ if (unlikely(address >= TASK_SIZE64)) {
++ /*
++ * Don't check for the module range here: its PML4
++ * is always initialized because it's shared with the main
++ * kernel text. Only vmalloc may need PML4 syncups.
++ */
++ if (!(error_code & (PF_RSVD|PF_USER|PF_PROT)) &&
++ ((address >= VMALLOC_START && address < VMALLOC_END))) {
++ if (vmalloc_fault(address) >= 0)
++ return;
++ }
++ /* Can take a spurious fault if mapping changes R/O -> R/W. */
++ if (spurious_fault(regs, address, error_code))
++ return;
++ if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
++ SIGSEGV) == NOTIFY_STOP)
++ return;
++ /*
++ * Don't take the mm semaphore here. If we fixup a prefetch
++ * fault we could otherwise deadlock.
++ */
++ goto bad_area_nosemaphore;
++ }
++
++ if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
++ SIGSEGV) == NOTIFY_STOP)
++ return;
++
++ if (likely(regs->eflags & X86_EFLAGS_IF))
++ local_irq_enable();
++
++ if (unlikely(page_fault_trace))
++ printk("pagefault rip:%lx rsp:%lx cs:%lu ss:%lu address %lx error %lx\n",
++ regs->rip,regs->rsp,regs->cs,regs->ss,address,error_code);
++
++ if (unlikely(error_code & PF_RSVD))
++ pgtable_bad(address, regs, error_code);
++
++ /*
++ * If we're in an interrupt or have no user
++ * context, we must not take the fault..
++ */
++ if (unlikely(in_atomic() || !mm))
++ goto bad_area_nosemaphore;
++
++ again:
++ /* When running in the kernel we expect faults to occur only to
++ * addresses in user space. All other faults represent errors in the
++ * kernel and should generate an OOPS. Unfortunatly, in the case of an
++ * erroneous fault occurring in a code path which already holds mmap_sem
++ * we will deadlock attempting to validate the fault against the
++ * address space. Luckily the kernel only validly references user
++ * space from well defined areas of code, which are listed in the
++ * exceptions table.
++ *
++ * As the vast majority of faults will be valid we will only perform
++ * the source reference check when there is a possibilty of a deadlock.
++ * Attempt to lock the address space, if we cannot we then validate the
++ * source. If this is invalid we can skip the address space check,
++ * thus avoiding the deadlock.
++ */
++ if (!down_read_trylock(&mm->mmap_sem)) {
++ if ((error_code & PF_USER) == 0 &&
++ !search_exception_tables(regs->rip))
++ goto bad_area_nosemaphore;
++ down_read(&mm->mmap_sem);
++ }
++
++ vma = find_vma(mm, address);
++ if (!vma)
++ goto bad_area;
++ if (likely(vma->vm_start <= address))
++ goto good_area;
++ if (!(vma->vm_flags & VM_GROWSDOWN))
++ goto bad_area;
++ if (error_code & 4) {
++ /* Allow userspace just enough access below the stack pointer
++ * to let the 'enter' instruction work.
++ */
++ if (address + 65536 + 32 * sizeof(unsigned long) < regs->rsp)
++ goto bad_area;
++ }
++ if (expand_stack(vma, address))
++ goto bad_area;
++/*
++ * Ok, we have a good vm_area for this memory access, so
++ * we can handle it..
++ */
++good_area:
++ info.si_code = SEGV_ACCERR;
++ write = 0;
++ switch (error_code & (PF_PROT|PF_WRITE)) {
++ default: /* 3: write, present */
++ /* fall through */
++ case PF_WRITE: /* write, not present */
++ if (!(vma->vm_flags & VM_WRITE))
++ goto bad_area;
++ write++;
++ break;
++ case PF_PROT: /* read, present */
++ goto bad_area;
++ case 0: /* read, not present */
++ if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
++ goto bad_area;
++ }
++
++ /*
++ * If for any reason at all we couldn't handle the fault,
++ * make sure we exit gracefully rather than endlessly redo
++ * the fault.
++ */
++ switch (handle_mm_fault(mm, vma, address, write)) {
++ case VM_FAULT_MINOR:
++ tsk->min_flt++;
++ break;
++ case VM_FAULT_MAJOR:
++ tsk->maj_flt++;
++ break;
++ case VM_FAULT_SIGBUS:
++ goto do_sigbus;
++ default:
++ goto out_of_memory;
++ }
++
++ up_read(&mm->mmap_sem);
++ return;
++
++/*
++ * Something tried to access memory that isn't in our memory map..
++ * Fix it, but check if it's kernel or user first..
++ */
++bad_area:
++ up_read(&mm->mmap_sem);
++
++bad_area_nosemaphore:
++ /* User mode accesses just cause a SIGSEGV */
++ if (error_code & PF_USER) {
++ if (is_prefetch(regs, address, error_code))
++ return;
++
++ /* Work around K8 erratum #100 K8 in compat mode
++ occasionally jumps to illegal addresses >4GB. We
++ catch this here in the page fault handler because
++ these addresses are not reachable. Just detect this
++ case and return. Any code segment in LDT is
++ compatibility mode. */
++ if ((regs->cs == __USER32_CS || (regs->cs & (1<<2))) &&
++ (address >> 32))
++ return;
++
++ if (exception_trace && unhandled_signal(tsk, SIGSEGV)) {
++ printk(
++ "%s%s[%d]: segfault at %016lx rip %016lx rsp %016lx error %lx\n",
++ tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
++ tsk->comm, tsk->pid, address, regs->rip,
++ regs->rsp, error_code);
++ }
++
++ tsk->thread.cr2 = address;
++ /* Kernel addresses are always protection faults */
++ tsk->thread.error_code = error_code | (address >= TASK_SIZE);
++ tsk->thread.trap_no = 14;
++ info.si_signo = SIGSEGV;
++ info.si_errno = 0;
++ /* info.si_code has been set above */
++ info.si_addr = (void __user *)address;
++ force_sig_info(SIGSEGV, &info, tsk);
++ return;
++ }
++
++no_context:
++
++ /* Are we prepared to handle this kernel fault? */
++ fixup = search_exception_tables(regs->rip);
++ if (fixup) {
++ regs->rip = fixup->fixup;
++ return;
++ }
++
++ /*
++ * Hall of shame of CPU/BIOS bugs.
++ */
++
++ if (is_prefetch(regs, address, error_code))
++ return;
++
++ if (is_errata93(regs, address))
++ return;
++
++/*
++ * Oops. The kernel tried to access some bad page. We'll have to
++ * terminate things with extreme prejudice.
++ */
++
++ flags = oops_begin();
++
++ if (address < PAGE_SIZE)
++ printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
++ else
++ printk(KERN_ALERT "Unable to handle kernel paging request");
++ printk(" at %016lx RIP: \n" KERN_ALERT,address);
++ printk_address(regs->rip);
++ dump_pagetable(address);
++ tsk->thread.cr2 = address;
++ tsk->thread.trap_no = 14;
++ tsk->thread.error_code = error_code;
++ __die("Oops", regs, error_code);
++ /* Executive summary in case the body of the oops scrolled away */
++ printk(KERN_EMERG "CR2: %016lx\n", address);
++ oops_end(flags);
++ do_exit(SIGKILL);
++
++/*
++ * We ran out of memory, or some other thing happened to us that made
++ * us unable to handle the page fault gracefully.
++ */
++out_of_memory:
++ up_read(&mm->mmap_sem);
++ if (current->pid == 1) {
++ yield();
++ goto again;
++ }
++ printk("VM: killing process %s\n", tsk->comm);
++ if (error_code & 4)
++ do_exit(SIGKILL);
++ goto no_context;
++
++do_sigbus:
++ up_read(&mm->mmap_sem);
++
++ /* Kernel mode? Handle exceptions or die */
++ if (!(error_code & PF_USER))
++ goto no_context;
++
++ tsk->thread.cr2 = address;
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 14;
++ info.si_signo = SIGBUS;
++ info.si_errno = 0;
++ info.si_code = BUS_ADRERR;
++ info.si_addr = (void __user *)address;
++ force_sig_info(SIGBUS, &info, tsk);
++ return;
++}
++
++DEFINE_SPINLOCK(pgd_lock);
++struct page *pgd_list;
++
++void vmalloc_sync_all(void)
++{
++ /* Note that races in the updates of insync and start aren't
++ problematic:
++ insync can only get set bits added, and updates to start are only
++ improving performance (without affecting correctness if undone). */
++ static DECLARE_BITMAP(insync, PTRS_PER_PGD);
++ static unsigned long start = VMALLOC_START & PGDIR_MASK;
++ unsigned long address;
++
++ for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
++ if (!test_bit(pgd_index(address), insync)) {
++ const pgd_t *pgd_ref = pgd_offset_k(address);
++ struct page *page;
++
++ if (pgd_none(*pgd_ref))
++ continue;
++ spin_lock(&pgd_lock);
++ for (page = pgd_list; page;
++ page = (struct page *)page->index) {
++ pgd_t *pgd;
++ pgd = (pgd_t *)page_address(page) + pgd_index(address);
++ if (pgd_none(*pgd))
++ set_pgd(pgd, *pgd_ref);
++ else
++ BUG_ON(pgd_page(*pgd) != pgd_page(*pgd_ref));
++ }
++ spin_unlock(&pgd_lock);
++ set_bit(pgd_index(address), insync);
++ }
++ if (address == start)
++ start = address + PGDIR_SIZE;
++ }
++ /* Check that there is no need to do the same for the modules area. */
++ BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL));
++ BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
++ (__START_KERNEL & PGDIR_MASK)));
++}
++
++static int __init enable_pagefaulttrace(char *str)
++{
++ page_fault_trace = 1;
++ return 1;
++}
++__setup("pagefaulttrace", enable_pagefaulttrace);
+Index: head-2008-11-25/arch/x86/mm/init_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/init_64-xen.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,1206 @@
++/*
++ * linux/arch/x86_64/mm/init.c
++ *
++ * Copyright (C) 1995 Linus Torvalds
++ * Copyright (C) 2000 Pavel Machek <pavel@suse.cz>
++ * Copyright (C) 2002,2003 Andi Kleen <ak@suse.de>
++ *
++ * Jun Nakajima <jun.nakajima@intel.com>
++ * Modified for Xen.
++ */
++
++#include <linux/signal.h>
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/types.h>
++#include <linux/ptrace.h>
++#include <linux/mman.h>
++#include <linux/mm.h>
++#include <linux/swap.h>
++#include <linux/smp.h>
++#include <linux/init.h>
++#include <linux/pagemap.h>
++#include <linux/bootmem.h>
++#include <linux/proc_fs.h>
++#include <linux/pci.h>
++#include <linux/poison.h>
++#include <linux/dma-mapping.h>
++#include <linux/module.h>
++#include <linux/memory_hotplug.h>
++
++#include <asm/processor.h>
++#include <asm/system.h>
++#include <asm/uaccess.h>
++#include <asm/pgtable.h>
++#include <asm/pgalloc.h>
++#include <asm/dma.h>
++#include <asm/fixmap.h>
++#include <asm/e820.h>
++#include <asm/apic.h>
++#include <asm/tlb.h>
++#include <asm/mmu_context.h>
++#include <asm/proto.h>
++#include <asm/smp.h>
++#include <asm/sections.h>
++
++#include <xen/features.h>
++
++#ifndef Dprintk
++#define Dprintk(x...)
++#endif
++
++struct dma_mapping_ops* dma_ops;
++EXPORT_SYMBOL(dma_ops);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++unsigned int __kernel_page_user;
++EXPORT_SYMBOL(__kernel_page_user);
++#endif
++
++int after_bootmem;
++
++static unsigned long dma_reserve __initdata;
++
++DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
++extern unsigned long start_pfn;
++
++/*
++ * Use this until direct mapping is established, i.e. before __va() is
++ * available in init_memory_mapping().
++ */
++
++#define addr_to_page(addr, page) \
++ (addr) &= PHYSICAL_PAGE_MASK; \
++ (page) = ((unsigned long *) ((unsigned long) \
++ (((mfn_to_pfn((addr) >> PAGE_SHIFT)) << PAGE_SHIFT) + \
++ __START_KERNEL_map)))
++
++static void __meminit early_make_page_readonly(void *va, unsigned int feature)
++{
++ unsigned long addr, _va = (unsigned long)va;
++ pte_t pte, *ptep;
++ unsigned long *page = (unsigned long *) init_level4_pgt;
++
++ BUG_ON(after_bootmem);
++
++ if (xen_feature(feature))
++ return;
++
++ addr = (unsigned long) page[pgd_index(_va)];
++ addr_to_page(addr, page);
++
++ addr = page[pud_index(_va)];
++ addr_to_page(addr, page);
++
++ addr = page[pmd_index(_va)];
++ addr_to_page(addr, page);
++
++ ptep = (pte_t *) &page[pte_index(_va)];
++
++ pte.pte = ptep->pte & ~_PAGE_RW;
++ if (HYPERVISOR_update_va_mapping(_va, pte, 0))
++ BUG();
++}
++
++static void __make_page_readonly(void *va)
++{
++ pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t pte, *ptep;
++ unsigned long addr = (unsigned long) va;
++
++ pgd = pgd_offset_k(addr);
++ pud = pud_offset(pgd, addr);
++ pmd = pmd_offset(pud, addr);
++ ptep = pte_offset_kernel(pmd, addr);
++
++ pte.pte = ptep->pte & ~_PAGE_RW;
++ if (HYPERVISOR_update_va_mapping(addr, pte, 0))
++ xen_l1_entry_update(ptep, pte); /* fallback */
++
++ if ((addr >= VMALLOC_START) && (addr < VMALLOC_END))
++ __make_page_readonly(__va(pte_pfn(pte) << PAGE_SHIFT));
++}
++
++static void __make_page_writable(void *va)
++{
++ pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t pte, *ptep;
++ unsigned long addr = (unsigned long) va;
++
++ pgd = pgd_offset_k(addr);
++ pud = pud_offset(pgd, addr);
++ pmd = pmd_offset(pud, addr);
++ ptep = pte_offset_kernel(pmd, addr);
++
++ pte.pte = ptep->pte | _PAGE_RW;
++ if (HYPERVISOR_update_va_mapping(addr, pte, 0))
++ xen_l1_entry_update(ptep, pte); /* fallback */
++
++ if ((addr >= VMALLOC_START) && (addr < VMALLOC_END))
++ __make_page_writable(__va(pte_pfn(pte) << PAGE_SHIFT));
++}
++
++void make_page_readonly(void *va, unsigned int feature)
++{
++ if (!xen_feature(feature))
++ __make_page_readonly(va);
++}
++
++void make_page_writable(void *va, unsigned int feature)
++{
++ if (!xen_feature(feature))
++ __make_page_writable(va);
++}
++
++void make_pages_readonly(void *va, unsigned nr, unsigned int feature)
++{
++ if (xen_feature(feature))
++ return;
++
++ while (nr-- != 0) {
++ __make_page_readonly(va);
++ va = (void*)((unsigned long)va + PAGE_SIZE);
++ }
++}
++
++void make_pages_writable(void *va, unsigned nr, unsigned int feature)
++{
++ if (xen_feature(feature))
++ return;
++
++ while (nr-- != 0) {
++ __make_page_writable(va);
++ va = (void*)((unsigned long)va + PAGE_SIZE);
++ }
++}
++
++/*
++ * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the
++ * physical space so we can cache the place of the first one and move
++ * around without checking the pgd every time.
++ */
++
++void show_mem(void)
++{
++ long i, total = 0, reserved = 0;
++ long shared = 0, cached = 0;
++ pg_data_t *pgdat;
++ struct page *page;
++
++ printk(KERN_INFO "Mem-info:\n");
++ show_free_areas();
++ printk(KERN_INFO "Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
++
++ for_each_online_pgdat(pgdat) {
++ for (i = 0; i < pgdat->node_spanned_pages; ++i) {
++ page = pfn_to_page(pgdat->node_start_pfn + i);
++ total++;
++ if (PageReserved(page))
++ reserved++;
++ else if (PageSwapCache(page))
++ cached++;
++ else if (page_count(page))
++ shared += page_count(page) - 1;
++ }
++ }
++ printk(KERN_INFO "%lu pages of RAM\n", total);
++ printk(KERN_INFO "%lu reserved pages\n",reserved);
++ printk(KERN_INFO "%lu pages shared\n",shared);
++ printk(KERN_INFO "%lu pages swap cached\n",cached);
++}
++
++
++static __init void *spp_getpage(void)
++{
++ void *ptr;
++ if (after_bootmem)
++ ptr = (void *) get_zeroed_page(GFP_ATOMIC);
++ else if (start_pfn < table_end) {
++ ptr = __va(start_pfn << PAGE_SHIFT);
++ start_pfn++;
++ memset(ptr, 0, PAGE_SIZE);
++ } else
++ ptr = alloc_bootmem_pages(PAGE_SIZE);
++ if (!ptr || ((unsigned long)ptr & ~PAGE_MASK))
++ panic("set_pte_phys: cannot allocate page data %s\n", after_bootmem?"after bootmem":"");
++
++ Dprintk("spp_getpage %p\n", ptr);
++ return ptr;
++}
++
++#define pgd_offset_u(address) (__user_pgd(init_level4_pgt) + pgd_index(address))
++#define pud_offset_u(address) (level3_user_pgt + pud_index(address))
++
++static __init void set_pte_phys(unsigned long vaddr,
++ unsigned long phys, pgprot_t prot, int user_mode)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte, new_pte;
++
++ Dprintk("set_pte_phys %lx to %lx\n", vaddr, phys);
++
++ pgd = (user_mode ? pgd_offset_u(vaddr) : pgd_offset_k(vaddr));
++ if (pgd_none(*pgd)) {
++ printk("PGD FIXMAP MISSING, it should be setup in head.S!\n");
++ return;
++ }
++ pud = (user_mode ? pud_offset_u(vaddr) : pud_offset(pgd, vaddr));
++ if (pud_none(*pud)) {
++ pmd = (pmd_t *) spp_getpage();
++ make_page_readonly(pmd, XENFEAT_writable_page_tables);
++ set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
++ if (pmd != pmd_offset(pud, 0)) {
++ printk("PAGETABLE BUG #01! %p <-> %p\n", pmd, pmd_offset(pud,0));
++ return;
++ }
++ }
++ pmd = pmd_offset(pud, vaddr);
++ if (pmd_none(*pmd)) {
++ pte = (pte_t *) spp_getpage();
++ make_page_readonly(pte, XENFEAT_writable_page_tables);
++ set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
++ if (pte != pte_offset_kernel(pmd, 0)) {
++ printk("PAGETABLE BUG #02!\n");
++ return;
++ }
++ }
++ if (pgprot_val(prot))
++ new_pte = pfn_pte(phys >> PAGE_SHIFT, prot);
++ else
++ new_pte = __pte(0);
++
++ pte = pte_offset_kernel(pmd, vaddr);
++ if (!pte_none(*pte) && __pte_val(new_pte) &&
++ __pte_val(*pte) != (__pte_val(new_pte) & __supported_pte_mask))
++ pte_ERROR(*pte);
++ set_pte(pte, new_pte);
++
++ /*
++ * It's enough to flush this one mapping.
++ * (PGE mappings get flushed as well)
++ */
++ __flush_tlb_one(vaddr);
++}
++
++static __init void set_pte_phys_ma(unsigned long vaddr,
++ unsigned long phys, pgprot_t prot)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte, new_pte;
++
++ Dprintk("set_pte_phys %lx to %lx\n", vaddr, phys);
++
++ pgd = pgd_offset_k(vaddr);
++ if (pgd_none(*pgd)) {
++ printk("PGD FIXMAP MISSING, it should be setup in head.S!\n");
++ return;
++ }
++ pud = pud_offset(pgd, vaddr);
++ if (pud_none(*pud)) {
++
++ pmd = (pmd_t *) spp_getpage();
++ make_page_readonly(pmd, XENFEAT_writable_page_tables);
++ set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
++ if (pmd != pmd_offset(pud, 0)) {
++ printk("PAGETABLE BUG #01! %p <-> %p\n", pmd, pmd_offset(pud,0));
++ return;
++ }
++ }
++ pmd = pmd_offset(pud, vaddr);
++ if (pmd_none(*pmd)) {
++ pte = (pte_t *) spp_getpage();
++ make_page_readonly(pte, XENFEAT_writable_page_tables);
++ set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
++ if (pte != pte_offset_kernel(pmd, 0)) {
++ printk("PAGETABLE BUG #02!\n");
++ return;
++ }
++ }
++ new_pte = pfn_pte_ma(phys >> PAGE_SHIFT, prot);
++
++ pte = pte_offset_kernel(pmd, vaddr);
++ if (!pte_none(*pte) && __pte_val(new_pte) &&
++#ifdef CONFIG_ACPI
++ /* __acpi_map_table() fails to properly call clear_fixmap() */
++ (vaddr < __fix_to_virt(FIX_ACPI_END) ||
++ vaddr > __fix_to_virt(FIX_ACPI_BEGIN)) &&
++#endif
++ __pte_val(*pte) != (__pte_val(new_pte) & __supported_pte_mask))
++ pte_ERROR(*pte);
++ set_pte(pte, new_pte);
++
++ /*
++ * It's enough to flush this one mapping.
++ * (PGE mappings get flushed as well)
++ */
++ __flush_tlb_one(vaddr);
++}
++
++/* NOTE: this is meant to be run only at boot */
++void __init
++__set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
++{
++ unsigned long address = __fix_to_virt(idx);
++
++ if (idx >= __end_of_fixed_addresses) {
++ printk("Invalid __set_fixmap\n");
++ return;
++ }
++ switch (idx) {
++ case VSYSCALL_LAST_PAGE ... VSYSCALL_FIRST_PAGE:
++ set_pte_phys(address, phys, prot, 0);
++ set_pte_phys(address, phys, prot, 1);
++ break;
++ default:
++ set_pte_phys_ma(address, phys, prot);
++ break;
++ }
++}
++
++unsigned long __initdata table_start, table_end;
++
++static __meminit void *alloc_static_page(unsigned long *phys)
++{
++ unsigned long va = (start_pfn << PAGE_SHIFT) + __START_KERNEL_map;
++
++ if (after_bootmem) {
++ void *adr = (void *)get_zeroed_page(GFP_ATOMIC);
++
++ *phys = __pa(adr);
++ return adr;
++ }
++
++ *phys = start_pfn << PAGE_SHIFT;
++ start_pfn++;
++ memset((void *)va, 0, PAGE_SIZE);
++ return (void *)va;
++}
++
++#define PTE_SIZE PAGE_SIZE
++
++static inline int make_readonly(unsigned long paddr)
++{
++ extern char __vsyscall_0;
++ int readonly = 0;
++
++ /* Make new page tables read-only. */
++ if (!xen_feature(XENFEAT_writable_page_tables)
++ && (paddr >= (table_start << PAGE_SHIFT))
++ && (paddr < (table_end << PAGE_SHIFT)))
++ readonly = 1;
++ /* Make old page tables read-only. */
++ if (!xen_feature(XENFEAT_writable_page_tables)
++ && (paddr >= (xen_start_info->pt_base - __START_KERNEL_map))
++ && (paddr < (start_pfn << PAGE_SHIFT)))
++ readonly = 1;
++
++ /*
++ * No need for writable mapping of kernel image. This also ensures that
++ * page and descriptor tables embedded inside don't have writable
++ * mappings. Exclude the vsyscall area here, allowing alternative
++ * instruction patching to work.
++ */
++ if ((paddr >= __pa_symbol(&_text)) && (paddr < __pa_symbol(&_end))
++ && !(paddr >= __pa_symbol(&__vsyscall_0)
++ && paddr < __pa_symbol(&__vsyscall_0) + PAGE_SIZE))
++ readonly = 1;
++
++ return readonly;
++}
++
++#ifndef CONFIG_XEN
++/* Must run before zap_low_mappings */
++__init void *early_ioremap(unsigned long addr, unsigned long size)
++{
++ unsigned long map = round_down(addr, LARGE_PAGE_SIZE);
++
++ /* actually usually some more */
++ if (size >= LARGE_PAGE_SIZE) {
++ printk("SMBIOS area too long %lu\n", size);
++ return NULL;
++ }
++ set_pmd(temp_mappings[0].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
++ map += LARGE_PAGE_SIZE;
++ set_pmd(temp_mappings[1].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
++ __flush_tlb();
++ return temp_mappings[0].address + (addr & (LARGE_PAGE_SIZE-1));
++}
++
++/* To avoid virtual aliases later */
++__init void early_iounmap(void *addr, unsigned long size)
++{
++ if ((void *)round_down((unsigned long)addr, LARGE_PAGE_SIZE) != temp_mappings[0].address)
++ printk("early_iounmap: bad address %p\n", addr);
++ set_pmd(temp_mappings[0].pmd, __pmd(0));
++ set_pmd(temp_mappings[1].pmd, __pmd(0));
++ __flush_tlb();
++}
++#endif
++
++static void __meminit
++phys_pmd_init(pmd_t *pmd, unsigned long address, unsigned long end)
++{
++ int i, k;
++
++ for (i = 0; i < PTRS_PER_PMD; pmd++, i++) {
++ unsigned long pte_phys;
++ pte_t *pte, *pte_save;
++
++ if (address >= end)
++ break;
++ pte = alloc_static_page(&pte_phys);
++ pte_save = pte;
++ for (k = 0; k < PTRS_PER_PTE; pte++, k++, address += PTE_SIZE) {
++ unsigned long pteval = address | _PAGE_NX | _KERNPG_TABLE;
++
++ if (address >= (after_bootmem
++ ? end
++ : xen_start_info->nr_pages << PAGE_SHIFT))
++ pteval = 0;
++ else if (make_readonly(address))
++ pteval &= ~_PAGE_RW;
++ set_pte(pte, __pte(pteval & __supported_pte_mask));
++ }
++ if (!after_bootmem) {
++ early_make_page_readonly(pte_save, XENFEAT_writable_page_tables);
++ *pmd = __pmd(pte_phys | _KERNPG_TABLE);
++ } else {
++ make_page_readonly(pte_save, XENFEAT_writable_page_tables);
++ set_pmd(pmd, __pmd(pte_phys | _KERNPG_TABLE));
++ }
++ }
++}
++
++static void __meminit
++phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end)
++{
++ pmd_t *pmd = pmd_offset(pud, (unsigned long)__va(address));
++
++ if (pmd_none(*pmd)) {
++ spin_lock(&init_mm.page_table_lock);
++ phys_pmd_init(pmd, address, end);
++ spin_unlock(&init_mm.page_table_lock);
++ __flush_tlb_all();
++ }
++}
++
++static void __meminit phys_pud_init(pud_t *pud, unsigned long address, unsigned long end)
++{
++ long i = pud_index(address);
++
++ pud = pud + i;
++
++ if (after_bootmem && pud_val(*pud)) {
++ phys_pmd_update(pud, address, end);
++ return;
++ }
++
++ for (; i < PTRS_PER_PUD; pud++, i++) {
++ unsigned long paddr, pmd_phys;
++ pmd_t *pmd;
++
++ paddr = (address & PGDIR_MASK) + i*PUD_SIZE;
++ if (paddr >= end)
++ break;
++
++ pmd = alloc_static_page(&pmd_phys);
++
++ spin_lock(&init_mm.page_table_lock);
++ *pud = __pud(pmd_phys | _KERNPG_TABLE);
++ phys_pmd_init(pmd, paddr, end);
++ spin_unlock(&init_mm.page_table_lock);
++
++ early_make_page_readonly(pmd, XENFEAT_writable_page_tables);
++ }
++ __flush_tlb();
++}
++
++void __init xen_init_pt(void)
++{
++ unsigned long addr, *page;
++
++ /* Find the initial pte page that was built for us. */
++ page = (unsigned long *)xen_start_info->pt_base;
++ addr = page[pgd_index(__START_KERNEL_map)];
++ addr_to_page(addr, page);
++ addr = page[pud_index(__START_KERNEL_map)];
++ addr_to_page(addr, page);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ /* On Xen 3.0.2 and older we may need to explicitly specify _PAGE_USER
++ in kernel PTEs. We check that here. */
++ if (HYPERVISOR_xen_version(XENVER_version, NULL) <= 0x30000) {
++ unsigned long *pg;
++ pte_t pte;
++
++ /* Mess with the initial mapping of page 0. It's not needed. */
++ BUILD_BUG_ON(__START_KERNEL <= __START_KERNEL_map);
++ addr = page[pmd_index(__START_KERNEL_map)];
++ addr_to_page(addr, pg);
++ pte.pte = pg[pte_index(__START_KERNEL_map)];
++ BUG_ON(!(pte.pte & _PAGE_PRESENT));
++
++ /* If _PAGE_USER isn't set, we obviously do not need it. */
++ if (pte.pte & _PAGE_USER) {
++ /* _PAGE_USER is needed, but is it set implicitly? */
++ pte.pte &= ~_PAGE_USER;
++ if ((HYPERVISOR_update_va_mapping(__START_KERNEL_map,
++ pte, 0) != 0) ||
++ !(pg[pte_index(__START_KERNEL_map)] & _PAGE_USER))
++ /* We need to explicitly specify _PAGE_USER. */
++ __kernel_page_user = _PAGE_USER;
++ }
++ }
++#endif
++
++ /* Construct mapping of initial pte page in our own directories. */
++ init_level4_pgt[pgd_index(__START_KERNEL_map)] =
++ __pgd(__pa_symbol(level3_kernel_pgt) | _PAGE_TABLE);
++ level3_kernel_pgt[pud_index(__START_KERNEL_map)] =
++ __pud(__pa_symbol(level2_kernel_pgt) | _PAGE_TABLE);
++ memcpy(level2_kernel_pgt, page, PAGE_SIZE);
++
++ __user_pgd(init_level4_pgt)[pgd_index(VSYSCALL_START)] =
++ __pgd(__pa_symbol(level3_user_pgt) | _PAGE_TABLE);
++
++ early_make_page_readonly(init_level4_pgt,
++ XENFEAT_writable_page_tables);
++ early_make_page_readonly(__user_pgd(init_level4_pgt),
++ XENFEAT_writable_page_tables);
++ early_make_page_readonly(level3_kernel_pgt,
++ XENFEAT_writable_page_tables);
++ early_make_page_readonly(level3_user_pgt,
++ XENFEAT_writable_page_tables);
++ early_make_page_readonly(level2_kernel_pgt,
++ XENFEAT_writable_page_tables);
++
++ if (!xen_feature(XENFEAT_writable_page_tables)) {
++ xen_pgd_pin(__pa_symbol(init_level4_pgt));
++ xen_pgd_pin(__pa_symbol(__user_pgd(init_level4_pgt)));
++ }
++}
++
++static void __init extend_init_mapping(unsigned long tables_space)
++{
++ unsigned long va = __START_KERNEL_map;
++ unsigned long phys, addr, *pte_page;
++ pmd_t *pmd;
++ pte_t *pte, new_pte;
++ unsigned long *page = (unsigned long *)init_level4_pgt;
++
++ addr = page[pgd_index(va)];
++ addr_to_page(addr, page);
++ addr = page[pud_index(va)];
++ addr_to_page(addr, page);
++
++ /* Kill mapping of low 1MB. */
++ while (va < (unsigned long)&_text) {
++ if (HYPERVISOR_update_va_mapping(va, __pte_ma(0), 0))
++ BUG();
++ va += PAGE_SIZE;
++ }
++
++ /* Ensure init mappings cover kernel text/data and initial tables. */
++ while (va < (__START_KERNEL_map
++ + (start_pfn << PAGE_SHIFT)
++ + tables_space)) {
++ pmd = (pmd_t *)&page[pmd_index(va)];
++ if (pmd_none(*pmd)) {
++ pte_page = alloc_static_page(&phys);
++ early_make_page_readonly(
++ pte_page, XENFEAT_writable_page_tables);
++ set_pmd(pmd, __pmd(phys | _KERNPG_TABLE));
++ } else {
++ addr = page[pmd_index(va)];
++ addr_to_page(addr, pte_page);
++ }
++ pte = (pte_t *)&pte_page[pte_index(va)];
++ if (pte_none(*pte)) {
++ new_pte = pfn_pte(
++ (va - __START_KERNEL_map) >> PAGE_SHIFT,
++ __pgprot(_KERNPG_TABLE));
++ xen_l1_entry_update(pte, new_pte);
++ }
++ va += PAGE_SIZE;
++ }
++
++ /* Finally, blow away any spurious initial mappings. */
++ while (1) {
++ pmd = (pmd_t *)&page[pmd_index(va)];
++ if (pmd_none(*pmd))
++ break;
++ if (HYPERVISOR_update_va_mapping(va, __pte_ma(0), 0))
++ BUG();
++ va += PAGE_SIZE;
++ }
++}
++
++static void __init find_early_table_space(unsigned long end)
++{
++ unsigned long puds, pmds, ptes, tables;
++
++ puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
++ pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
++ ptes = (end + PTE_SIZE - 1) >> PAGE_SHIFT;
++
++ tables = round_up(puds * 8, PAGE_SIZE) +
++ round_up(pmds * 8, PAGE_SIZE) +
++ round_up(ptes * 8, PAGE_SIZE);
++
++ extend_init_mapping(tables);
++
++ table_start = start_pfn;
++ table_end = table_start + (tables>>PAGE_SHIFT);
++
++ early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n",
++ end, table_start << PAGE_SHIFT,
++ (table_start << PAGE_SHIFT) + tables);
++}
++
++static void xen_finish_init_mapping(void)
++{
++ unsigned long i, start, end;
++
++ /* Re-vector virtual addresses pointing into the initial
++ mapping to the just-established permanent ones. */
++ xen_start_info = __va(__pa(xen_start_info));
++ xen_start_info->pt_base = (unsigned long)
++ __va(__pa(xen_start_info->pt_base));
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ phys_to_machine_mapping =
++ __va(__pa(xen_start_info->mfn_list));
++ xen_start_info->mfn_list = (unsigned long)
++ phys_to_machine_mapping;
++ }
++ if (xen_start_info->mod_start)
++ xen_start_info->mod_start = (unsigned long)
++ __va(__pa(xen_start_info->mod_start));
++
++ /* Destroy the Xen-created mappings beyond the kernel image as
++ * well as the temporary mappings created above. Prevents
++ * overlap with modules area (if init mapping is very big).
++ */
++ start = PAGE_ALIGN((unsigned long)_end);
++ end = __START_KERNEL_map + (table_end << PAGE_SHIFT);
++ for (; start < end; start += PAGE_SIZE)
++ if (HYPERVISOR_update_va_mapping(start, __pte_ma(0), 0))
++ BUG();
++
++ /* Allocate pte's for initial fixmaps from 'start_pfn' allocator. */
++ table_end = ~0UL;
++
++ /*
++ * Prefetch pte's for the bt_ioremap() area. It gets used before the
++ * boot-time allocator is online, so allocate-on-demand would fail.
++ */
++ for (i = FIX_BTMAP_END; i <= FIX_BTMAP_BEGIN; i++)
++ __set_fixmap(i, 0, __pgprot(0));
++
++ /* Switch to the real shared_info page, and clear the dummy page. */
++ set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info);
++ HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
++ memset(empty_zero_page, 0, sizeof(empty_zero_page));
++
++ /* Set up mapping of lowest 1MB of physical memory. */
++ for (i = 0; i < NR_FIX_ISAMAPS; i++)
++ if (is_initial_xendomain())
++ set_fixmap(FIX_ISAMAP_BEGIN - i, i * PAGE_SIZE);
++ else
++ __set_fixmap(FIX_ISAMAP_BEGIN - i,
++ virt_to_mfn(empty_zero_page)
++ << PAGE_SHIFT,
++ PAGE_KERNEL_RO);
++
++ /* Disable the 'start_pfn' allocator. */
++ table_end = start_pfn;
++}
++
++/* Setup the direct mapping of the physical memory at PAGE_OFFSET.
++ This runs before bootmem is initialized and gets pages directly from the
++ physical memory. To access them they are temporarily mapped. */
++void __meminit init_memory_mapping(unsigned long start, unsigned long end)
++{
++ unsigned long next;
++
++ Dprintk("init_memory_mapping\n");
++
++ /*
++ * Find space for the kernel direct mapping tables.
++ * Later we should allocate these tables in the local node of the memory
++ * mapped. Unfortunately this is done currently before the nodes are
++ * discovered.
++ */
++ if (!after_bootmem)
++ find_early_table_space(end);
++
++ start = (unsigned long)__va(start);
++ end = (unsigned long)__va(end);
++
++ for (; start < end; start = next) {
++ unsigned long pud_phys;
++ pgd_t *pgd = pgd_offset_k(start);
++ pud_t *pud;
++
++ if (after_bootmem)
++ pud = pud_offset(pgd, start & PGDIR_MASK);
++ else
++ pud = alloc_static_page(&pud_phys);
++ next = start + PGDIR_SIZE;
++ if (next > end)
++ next = end;
++ phys_pud_init(pud, __pa(start), __pa(next));
++ if (!after_bootmem) {
++ early_make_page_readonly(pud, XENFEAT_writable_page_tables);
++ set_pgd(pgd_offset_k(start), mk_kernel_pgd(pud_phys));
++ }
++ }
++
++ if (!after_bootmem) {
++ BUG_ON(start_pfn != table_end);
++ xen_finish_init_mapping();
++ }
++
++ __flush_tlb_all();
++}
++
++void __cpuinit zap_low_mappings(int cpu)
++{
++ /* this is not required for Xen */
++#if 0
++ swap_low_mappings();
++#endif
++}
++
++/* Compute zone sizes for the DMA and DMA32 zones in a node. */
++__init void
++size_zones(unsigned long *z, unsigned long *h,
++ unsigned long start_pfn, unsigned long end_pfn)
++{
++ int i;
++ unsigned long w;
++
++ for (i = 0; i < MAX_NR_ZONES; i++)
++ z[i] = 0;
++
++ if (start_pfn < MAX_DMA_PFN)
++ z[ZONE_DMA] = MAX_DMA_PFN - start_pfn;
++ if (start_pfn < MAX_DMA32_PFN) {
++ unsigned long dma32_pfn = MAX_DMA32_PFN;
++ if (dma32_pfn > end_pfn)
++ dma32_pfn = end_pfn;
++ z[ZONE_DMA32] = dma32_pfn - start_pfn;
++ }
++ z[ZONE_NORMAL] = end_pfn - start_pfn;
++
++ /* Remove lower zones from higher ones. */
++ w = 0;
++ for (i = 0; i < MAX_NR_ZONES; i++) {
++ if (z[i])
++ z[i] -= w;
++ w += z[i];
++ }
++
++ /* Compute holes */
++ w = start_pfn;
++ for (i = 0; i < MAX_NR_ZONES; i++) {
++ unsigned long s = w;
++ w += z[i];
++ h[i] = e820_hole_size(s, w);
++ }
++
++ /* Add the space pace needed for mem_map to the holes too. */
++ for (i = 0; i < MAX_NR_ZONES; i++)
++ h[i] += (z[i] * sizeof(struct page)) / PAGE_SIZE;
++
++ /* The 16MB DMA zone has the kernel and other misc mappings.
++ Account them too */
++ if (h[ZONE_DMA]) {
++ h[ZONE_DMA] += dma_reserve;
++ if (h[ZONE_DMA] >= z[ZONE_DMA]) {
++ printk(KERN_WARNING
++ "Kernel too large and filling up ZONE_DMA?\n");
++ h[ZONE_DMA] = z[ZONE_DMA];
++ }
++ }
++}
++
++#ifndef CONFIG_NUMA
++void __init paging_init(void)
++{
++ unsigned long zones[MAX_NR_ZONES], holes[MAX_NR_ZONES];
++
++ memory_present(0, 0, end_pfn);
++ sparse_init();
++ size_zones(zones, holes, 0, end_pfn);
++ free_area_init_node(0, NODE_DATA(0), zones,
++ __pa(PAGE_OFFSET) >> PAGE_SHIFT, holes);
++
++ init_mm.context.pinned = 1;
++}
++#endif
++
++/* Unmap a kernel mapping if it exists. This is useful to avoid prefetches
++ from the CPU leading to inconsistent cache lines. address and size
++ must be aligned to 2MB boundaries.
++ Does nothing when the mapping doesn't exist. */
++void __init clear_kernel_mapping(unsigned long address, unsigned long size)
++{
++ unsigned long end = address + size;
++
++ BUG_ON(address & ~LARGE_PAGE_MASK);
++ BUG_ON(size & ~LARGE_PAGE_MASK);
++
++ for (; address < end; address += LARGE_PAGE_SIZE) {
++ pgd_t *pgd = pgd_offset_k(address);
++ pud_t *pud;
++ pmd_t *pmd;
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, address);
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, address);
++ if (!pmd || pmd_none(*pmd))
++ continue;
++ if (0 == (__pmd_val(*pmd) & _PAGE_PSE)) {
++ /* Could handle this, but it should not happen currently. */
++ printk(KERN_ERR
++ "clear_kernel_mapping: mapping has been split. will leak memory\n");
++ pmd_ERROR(*pmd);
++ }
++ set_pmd(pmd, __pmd(0));
++ }
++ __flush_tlb_all();
++}
++
++/*
++ * Memory hotplug specific functions
++ */
++void online_page(struct page *page)
++{
++ ClearPageReserved(page);
++ init_page_count(page);
++ __free_page(page);
++ totalram_pages++;
++ num_physpages++;
++}
++
++#ifdef CONFIG_MEMORY_HOTPLUG
++/*
++ * XXX: memory_add_physaddr_to_nid() is to find node id from physical address
++ * via probe interface of sysfs. If acpi notifies hot-add event, then it
++ * can tell node id by searching dsdt. But, probe interface doesn't have
++ * node id. So, return 0 as node id at this time.
++ */
++#ifdef CONFIG_NUMA
++int memory_add_physaddr_to_nid(u64 start)
++{
++ return 0;
++}
++#endif
++
++/*
++ * Memory is added always to NORMAL zone. This means you will never get
++ * additional DMA/DMA32 memory.
++ */
++int arch_add_memory(int nid, u64 start, u64 size)
++{
++ struct pglist_data *pgdat = NODE_DATA(nid);
++ struct zone *zone = pgdat->node_zones + MAX_NR_ZONES-2;
++ unsigned long start_pfn = start >> PAGE_SHIFT;
++ unsigned long nr_pages = size >> PAGE_SHIFT;
++ int ret;
++
++ ret = __add_pages(zone, start_pfn, nr_pages);
++ if (ret)
++ goto error;
++
++ init_memory_mapping(start, (start + size -1));
++
++ return ret;
++error:
++ printk("%s: Problem encountered in __add_pages!\n", __func__);
++ return ret;
++}
++EXPORT_SYMBOL_GPL(arch_add_memory);
++
++int remove_memory(u64 start, u64 size)
++{
++ return -EINVAL;
++}
++EXPORT_SYMBOL_GPL(remove_memory);
++
++#else /* CONFIG_MEMORY_HOTPLUG */
++/*
++ * Memory Hotadd without sparsemem. The mem_maps have been allocated in advance,
++ * just online the pages.
++ */
++int __add_pages(struct zone *z, unsigned long start_pfn, unsigned long nr_pages)
++{
++ int err = -EIO;
++ unsigned long pfn;
++ unsigned long total = 0, mem = 0;
++ for (pfn = start_pfn; pfn < start_pfn + nr_pages; pfn++) {
++ if (pfn_valid(pfn)) {
++ online_page(pfn_to_page(pfn));
++ err = 0;
++ mem++;
++ }
++ total++;
++ }
++ if (!err) {
++ z->spanned_pages += total;
++ z->present_pages += mem;
++ z->zone_pgdat->node_spanned_pages += total;
++ z->zone_pgdat->node_present_pages += mem;
++ }
++ return err;
++}
++#endif /* CONFIG_MEMORY_HOTPLUG */
++
++static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, kcore_modules,
++ kcore_vsyscall;
++
++void __init mem_init(void)
++{
++ long codesize, reservedpages, datasize, initsize;
++ unsigned long pfn;
++
++ pci_iommu_alloc();
++
++ /* How many end-of-memory variables you have, grandma! */
++ max_low_pfn = end_pfn;
++ max_pfn = end_pfn;
++ num_physpages = end_pfn;
++ high_memory = (void *) __va(end_pfn * PAGE_SIZE);
++
++ /* clear the zero-page */
++ memset(empty_zero_page, 0, PAGE_SIZE);
++
++ reservedpages = 0;
++
++ /* this will put all low memory onto the freelists */
++#ifdef CONFIG_NUMA
++ totalram_pages = numa_free_all_bootmem();
++#else
++ totalram_pages = free_all_bootmem();
++#endif
++ /* XEN: init and count pages outside initial allocation. */
++ for (pfn = xen_start_info->nr_pages; pfn < max_pfn; pfn++) {
++ ClearPageReserved(pfn_to_page(pfn));
++ init_page_count(pfn_to_page(pfn));
++ totalram_pages++;
++ }
++ reservedpages = end_pfn - totalram_pages - e820_hole_size(0, end_pfn);
++
++ after_bootmem = 1;
++
++ codesize = (unsigned long) &_etext - (unsigned long) &_text;
++ datasize = (unsigned long) &_edata - (unsigned long) &_etext;
++ initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
++
++ /* Register memory areas for /proc/kcore */
++ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
++ kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
++ VMALLOC_END-VMALLOC_START);
++ kclist_add(&kcore_kernel, &_stext, _end - _stext);
++ kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN);
++ kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START,
++ VSYSCALL_END - VSYSCALL_START);
++
++ printk("Memory: %luk/%luk available (%ldk kernel code, %ldk reserved, %ldk data, %ldk init)\n",
++ (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
++ end_pfn << (PAGE_SHIFT-10),
++ codesize >> 10,
++ reservedpages << (PAGE_SHIFT-10),
++ datasize >> 10,
++ initsize >> 10);
++
++#ifndef CONFIG_XEN
++#ifdef CONFIG_SMP
++ /*
++ * Sync boot_level4_pgt mappings with the init_level4_pgt
++ * except for the low identity mappings which are already zapped
++ * in init_level4_pgt. This sync-up is essential for AP's bringup
++ */
++ memcpy(boot_level4_pgt+1, init_level4_pgt+1, (PTRS_PER_PGD-1)*sizeof(pgd_t));
++#endif
++#endif
++}
++
++void free_init_pages(char *what, unsigned long begin, unsigned long end)
++{
++ unsigned long addr;
++
++ if (begin >= end)
++ return;
++
++ printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
++ for (addr = begin; addr < end; addr += PAGE_SIZE) {
++ ClearPageReserved(virt_to_page(addr));
++ init_page_count(virt_to_page(addr));
++ memset((void *)(addr & ~(PAGE_SIZE-1)),
++ POISON_FREE_INITMEM, PAGE_SIZE);
++ if (addr >= __START_KERNEL_map) {
++ /* make_readonly() reports all kernel addresses. */
++ __make_page_writable(__va(__pa(addr)));
++ if (HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
++ pgd_t *pgd = pgd_offset_k(addr);
++ pud_t *pud = pud_offset(pgd, addr);
++ pmd_t *pmd = pmd_offset(pud, addr);
++ pte_t *pte = pte_offset_kernel(pmd, addr);
++
++ xen_l1_entry_update(pte, __pte(0)); /* fallback */
++ }
++ }
++ free_page(addr);
++ totalram_pages++;
++ }
++}
++
++void free_initmem(void)
++{
++ memset(__initdata_begin, POISON_FREE_INITDATA,
++ __initdata_end - __initdata_begin);
++ free_init_pages("unused kernel memory",
++ (unsigned long)(&__init_begin),
++ (unsigned long)(&__init_end));
++}
++
++#ifdef CONFIG_DEBUG_RODATA
++
++void mark_rodata_ro(void)
++{
++ unsigned long addr = (unsigned long)__start_rodata;
++
++ for (; addr < (unsigned long)__end_rodata; addr += PAGE_SIZE)
++ change_page_attr_addr(addr, 1, PAGE_KERNEL_RO);
++
++ printk ("Write protecting the kernel read-only data: %luk\n",
++ (__end_rodata - __start_rodata) >> 10);
++
++ /*
++ * change_page_attr_addr() requires a global_flush_tlb() call after it.
++ * We do this after the printk so that if something went wrong in the
++ * change, the printk gets out at least to give a better debug hint
++ * of who is the culprit.
++ */
++ global_flush_tlb();
++}
++#endif
++
++#ifdef CONFIG_BLK_DEV_INITRD
++void free_initrd_mem(unsigned long start, unsigned long end)
++{
++ free_init_pages("initrd memory", start, end);
++}
++#endif
++
++void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
++{
++ /* Should check here against the e820 map to avoid double free */
++#ifdef CONFIG_NUMA
++ int nid = phys_to_nid(phys);
++ reserve_bootmem_node(NODE_DATA(nid), phys, len);
++#else
++ reserve_bootmem(phys, len);
++#endif
++ if (phys+len <= MAX_DMA_PFN*PAGE_SIZE)
++ dma_reserve += len / PAGE_SIZE;
++}
++
++int kern_addr_valid(unsigned long addr)
++{
++ unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT;
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++
++ if (above != 0 && above != -1UL)
++ return 0;
++
++ pgd = pgd_offset_k(addr);
++ if (pgd_none(*pgd))
++ return 0;
++
++ pud = pud_offset(pgd, addr);
++ if (pud_none(*pud))
++ return 0;
++
++ pmd = pmd_offset(pud, addr);
++ if (pmd_none(*pmd))
++ return 0;
++ if (pmd_large(*pmd))
++ return pfn_valid(pmd_pfn(*pmd));
++
++ pte = pte_offset_kernel(pmd, addr);
++ if (pte_none(*pte))
++ return 0;
++ return pfn_valid(pte_pfn(*pte));
++}
++
++#ifdef CONFIG_SYSCTL
++#include <linux/sysctl.h>
++
++extern int exception_trace, page_fault_trace;
++
++static ctl_table debug_table2[] = {
++ { 99, "exception-trace", &exception_trace, sizeof(int), 0644, NULL,
++ proc_dointvec },
++ { 0, }
++};
++
++static ctl_table debug_root_table2[] = {
++ { .ctl_name = CTL_DEBUG, .procname = "debug", .mode = 0555,
++ .child = debug_table2 },
++ { 0 },
++};
++
++static __init int x8664_sysctl_init(void)
++{
++ register_sysctl_table(debug_root_table2, 1);
++ return 0;
++}
++__initcall(x8664_sysctl_init);
++#endif
++
++/* A pseudo VMAs to allow ptrace access for the vsyscall page. This only
++ covers the 64bit vsyscall page now. 32bit has a real VMA now and does
++ not need special handling anymore. */
++
++static struct vm_area_struct gate_vma = {
++ .vm_start = VSYSCALL_START,
++ .vm_end = VSYSCALL_END,
++ .vm_page_prot = PAGE_READONLY
++};
++
++struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
++{
++#ifdef CONFIG_IA32_EMULATION
++ if (test_tsk_thread_flag(tsk, TIF_IA32))
++ return NULL;
++#endif
++ return &gate_vma;
++}
++
++int in_gate_area(struct task_struct *task, unsigned long addr)
++{
++ struct vm_area_struct *vma = get_gate_vma(task);
++ if (!vma)
++ return 0;
++ return (addr >= vma->vm_start) && (addr < vma->vm_end);
++}
++
++/* Use this when you have no reliable task/vma, typically from interrupt
++ * context. It is less reliable than using the task's vma and may give
++ * false positives.
++ */
++int in_gate_area_no_task(unsigned long addr)
++{
++ return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END);
++}
+Index: head-2008-11-25/arch/x86/mm/pageattr_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/arch/x86/mm/pageattr_64-xen.c 2008-07-21 11:00:32.000000000 +0200
+@@ -0,0 +1,502 @@
++/*
++ * Copyright 2002 Andi Kleen, SuSE Labs.
++ * Thanks to Ben LaHaise for precious feedback.
++ */
++
++#include <linux/mm.h>
++#include <linux/sched.h>
++#include <linux/highmem.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <asm/uaccess.h>
++#include <asm/processor.h>
++#include <asm/tlbflush.h>
++#include <asm/io.h>
++
++#ifdef CONFIG_XEN
++#include <asm/pgalloc.h>
++#include <asm/mmu_context.h>
++
++LIST_HEAD(mm_unpinned);
++DEFINE_SPINLOCK(mm_unpinned_lock);
++
++static void _pin_lock(struct mm_struct *mm, int lock) {
++ if (lock)
++ spin_lock(&mm->page_table_lock);
++#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
++ /* While mm->page_table_lock protects us against insertions and
++ * removals of higher level page table pages, it doesn't protect
++ * against updates of pte-s. Such updates, however, require the
++ * pte pages to be in consistent state (unpinned+writable or
++ * pinned+readonly). The pinning and attribute changes, however
++ * cannot be done atomically, which is why such updates must be
++ * prevented from happening concurrently.
++ * Note that no pte lock can ever elsewhere be acquired nesting
++ * with an already acquired one in the same mm, or with the mm's
++ * page_table_lock already acquired, as that would break in the
++ * non-split case (where all these are actually resolving to the
++ * one page_table_lock). Thus acquiring all of them here is not
++ * going to result in dead locks, and the order of acquires
++ * doesn't matter.
++ */
++ {
++ pgd_t *pgd = mm->pgd;
++ unsigned g;
++
++ for (g = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
++ pud_t *pud;
++ unsigned u;
++
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ pmd_t *pmd;
++ unsigned m;
++
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++ spinlock_t *ptl;
++
++ if (pmd_none(*pmd))
++ continue;
++ ptl = pte_lockptr(0, pmd);
++ if (lock)
++ spin_lock(ptl);
++ else
++ spin_unlock(ptl);
++ }
++ }
++ }
++ }
++#endif
++ if (!lock)
++ spin_unlock(&mm->page_table_lock);
++}
++#define pin_lock(mm) _pin_lock(mm, 1)
++#define pin_unlock(mm) _pin_lock(mm, 0)
++
++#define PIN_BATCH 8
++static DEFINE_PER_CPU(multicall_entry_t[PIN_BATCH], pb_mcl);
++
++static inline unsigned int mm_walk_set_prot(void *pt, pgprot_t flags,
++ unsigned int cpu, unsigned int seq)
++{
++ struct page *page = virt_to_page(pt);
++ unsigned long pfn = page_to_pfn(page);
++
++ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, flags), 0);
++ if (unlikely(++seq == PIN_BATCH)) {
++ if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
++ PIN_BATCH, NULL)))
++ BUG();
++ seq = 0;
++ }
++
++ return seq;
++}
++
++static void mm_walk(struct mm_struct *mm, pgprot_t flags)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++ int g,u,m;
++ unsigned int cpu, seq;
++ multicall_entry_t *mcl;
++
++ pgd = mm->pgd;
++ cpu = get_cpu();
++
++ /*
++ * Cannot iterate up to USER_PTRS_PER_PGD as these pagetables may not
++ * be the 'current' task's pagetables (e.g., current may be 32-bit,
++ * but the pagetables may be for a 64-bit task).
++ * Subtracting 1 from TASK_SIZE64 means the loop limit is correct
++ * regardless of whether TASK_SIZE64 is a multiple of PGDIR_SIZE.
++ */
++ for (g = 0, seq = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ if (PTRS_PER_PUD > 1) /* not folded */
++ seq = mm_walk_set_prot(pud,flags,cpu,seq);
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ if (PTRS_PER_PMD > 1) /* not folded */
++ seq = mm_walk_set_prot(pmd,flags,cpu,seq);
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++ if (pmd_none(*pmd))
++ continue;
++ pte = pte_offset_kernel(pmd,0);
++ seq = mm_walk_set_prot(pte,flags,cpu,seq);
++ }
++ }
++ }
++
++ mcl = per_cpu(pb_mcl, cpu);
++ if (unlikely(seq > PIN_BATCH - 2)) {
++ if (unlikely(HYPERVISOR_multicall_check(mcl, seq, NULL)))
++ BUG();
++ seq = 0;
++ }
++ MULTI_update_va_mapping(mcl + seq,
++ (unsigned long)__user_pgd(mm->pgd),
++ pfn_pte(virt_to_phys(__user_pgd(mm->pgd))>>PAGE_SHIFT, flags),
++ 0);
++ MULTI_update_va_mapping(mcl + seq + 1,
++ (unsigned long)mm->pgd,
++ pfn_pte(virt_to_phys(mm->pgd)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH);
++ if (unlikely(HYPERVISOR_multicall_check(mcl, seq + 2, NULL)))
++ BUG();
++
++ put_cpu();
++}
++
++void mm_pin(struct mm_struct *mm)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ pin_lock(mm);
++
++ mm_walk(mm, PAGE_KERNEL_RO);
++ xen_pgd_pin(__pa(mm->pgd)); /* kernel */
++ xen_pgd_pin(__pa(__user_pgd(mm->pgd))); /* user */
++ mm->context.pinned = 1;
++ spin_lock(&mm_unpinned_lock);
++ list_del(&mm->context.unpinned);
++ spin_unlock(&mm_unpinned_lock);
++
++ pin_unlock(mm);
++}
++
++void mm_unpin(struct mm_struct *mm)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ pin_lock(mm);
++
++ xen_pgd_unpin(__pa(mm->pgd));
++ xen_pgd_unpin(__pa(__user_pgd(mm->pgd)));
++ mm_walk(mm, PAGE_KERNEL);
++ mm->context.pinned = 0;
++ spin_lock(&mm_unpinned_lock);
++ list_add(&mm->context.unpinned, &mm_unpinned);
++ spin_unlock(&mm_unpinned_lock);
++
++ pin_unlock(mm);
++}
++
++void mm_pin_all(void)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ /*
++ * Allow uninterrupted access to the mm_unpinned list. We don't
++ * actually take the mm_unpinned_lock as it is taken inside mm_pin().
++ * All other CPUs must be at a safe point (e.g., in stop_machine
++ * or offlined entirely).
++ */
++ preempt_disable();
++ while (!list_empty(&mm_unpinned))
++ mm_pin(list_entry(mm_unpinned.next, struct mm_struct,
++ context.unpinned));
++ preempt_enable();
++}
++
++void _arch_dup_mmap(struct mm_struct *mm)
++{
++ if (!mm->context.pinned)
++ mm_pin(mm);
++}
++
++void _arch_exit_mmap(struct mm_struct *mm)
++{
++ struct task_struct *tsk = current;
++
++ task_lock(tsk);
++
++ /*
++ * We aggressively remove defunct pgd from cr3. We execute unmap_vmas()
++ * *much* faster this way, as no tlb flushes means bigger wrpt batches.
++ */
++ if (tsk->active_mm == mm) {
++ tsk->active_mm = &init_mm;
++ atomic_inc(&init_mm.mm_count);
++
++ switch_mm(mm, &init_mm, tsk);
++
++ atomic_dec(&mm->mm_count);
++ BUG_ON(atomic_read(&mm->mm_count) == 0);
++ }
++
++ task_unlock(tsk);
++
++ if ( mm->context.pinned && (atomic_read(&mm->mm_count) == 1) &&
++ !mm->context.has_foreign_mappings )
++ mm_unpin(mm);
++}
++
++struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
++{
++ struct page *pte;
++
++ pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
++ if (pte) {
++ SetPageForeign(pte, pte_free);
++ init_page_count(pte);
++ }
++ return pte;
++}
++
++void pte_free(struct page *pte)
++{
++ unsigned long va = (unsigned long)__va(page_to_pfn(pte)<<PAGE_SHIFT);
++
++ if (!pte_write(*virt_to_ptep(va)))
++ if (HYPERVISOR_update_va_mapping(
++ va, pfn_pte(page_to_pfn(pte), PAGE_KERNEL), 0))
++ BUG();
++
++ ClearPageForeign(pte);
++ init_page_count(pte);
++
++ __free_page(pte);
++}
++#endif /* CONFIG_XEN */
++
++pte_t *lookup_address(unsigned long address)
++{
++ pgd_t *pgd = pgd_offset_k(address);
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++ if (pgd_none(*pgd))
++ return NULL;
++ pud = pud_offset(pgd, address);
++ if (!pud_present(*pud))
++ return NULL;
++ pmd = pmd_offset(pud, address);
++ if (!pmd_present(*pmd))
++ return NULL;
++ if (pmd_large(*pmd))
++ return (pte_t *)pmd;
++ pte = pte_offset_kernel(pmd, address);
++ if (pte && !pte_present(*pte))
++ pte = NULL;
++ return pte;
++}
++
++static struct page *split_large_page(unsigned long address, pgprot_t prot,
++ pgprot_t ref_prot)
++{
++ int i;
++ unsigned long addr;
++ struct page *base = alloc_pages(GFP_KERNEL, 0);
++ pte_t *pbase;
++ if (!base)
++ return NULL;
++ /*
++ * page_private is used to track the number of entries in
++ * the page table page have non standard attributes.
++ */
++ SetPagePrivate(base);
++ page_private(base) = 0;
++
++ address = __pa(address);
++ addr = address & LARGE_PAGE_MASK;
++ pbase = (pte_t *)page_address(base);
++ for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) {
++ pbase[i] = pfn_pte(addr >> PAGE_SHIFT,
++ addr == address ? prot : ref_prot);
++ }
++ return base;
++}
++
++
++static void flush_kernel_map(void *address)
++{
++ if (0 && address && cpu_has_clflush) {
++ /* is this worth it? */
++ int i;
++ for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
++ asm volatile("clflush (%0)" :: "r" (address + i));
++ } else
++ asm volatile("wbinvd":::"memory");
++ if (address)
++ __flush_tlb_one(address);
++ else
++ __flush_tlb_all();
++}
++
++
++static inline void flush_map(unsigned long address)
++{
++ on_each_cpu(flush_kernel_map, (void *)address, 1, 1);
++}
++
++static struct page *deferred_pages; /* protected by init_mm.mmap_sem */
++
++static inline void save_page(struct page *fpage)
++{
++ fpage->lru.next = (struct list_head *)deferred_pages;
++ deferred_pages = fpage;
++}
++
++/*
++ * No more special protections in this 2/4MB area - revert to a
++ * large page again.
++ */
++static void revert_page(unsigned long address, pgprot_t ref_prot)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t large_pte;
++
++ pgd = pgd_offset_k(address);
++ BUG_ON(pgd_none(*pgd));
++ pud = pud_offset(pgd,address);
++ BUG_ON(pud_none(*pud));
++ pmd = pmd_offset(pud, address);
++ BUG_ON(__pmd_val(*pmd) & _PAGE_PSE);
++ pgprot_val(ref_prot) |= _PAGE_PSE;
++ large_pte = mk_pte_phys(__pa(address) & LARGE_PAGE_MASK, ref_prot);
++ set_pte((pte_t *)pmd, large_pte);
++}
++
++static int
++__change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot,
++ pgprot_t ref_prot)
++{
++ pte_t *kpte;
++ struct page *kpte_page;
++ unsigned kpte_flags;
++ pgprot_t ref_prot2;
++ kpte = lookup_address(address);
++ if (!kpte) return 0;
++ kpte_page = virt_to_page(((unsigned long)kpte) & PAGE_MASK);
++ kpte_flags = pte_val(*kpte);
++ if (pgprot_val(prot) != pgprot_val(ref_prot)) {
++ if ((kpte_flags & _PAGE_PSE) == 0) {
++ set_pte(kpte, pfn_pte(pfn, prot));
++ } else {
++ /*
++ * split_large_page will take the reference for this
++ * change_page_attr on the split page.
++ */
++
++ struct page *split;
++ ref_prot2 = __pgprot(pgprot_val(pte_pgprot(*lookup_address(address))) & ~(1<<_PAGE_BIT_PSE));
++
++ split = split_large_page(address, prot, ref_prot2);
++ if (!split)
++ return -ENOMEM;
++ set_pte(kpte,mk_pte(split, ref_prot2));
++ kpte_page = split;
++ }
++ page_private(kpte_page)++;
++ } else if ((kpte_flags & _PAGE_PSE) == 0) {
++ set_pte(kpte, pfn_pte(pfn, ref_prot));
++ BUG_ON(page_private(kpte_page) == 0);
++ page_private(kpte_page)--;
++ } else
++ BUG();
++
++ /* on x86-64 the direct mapping set at boot is not using 4k pages */
++ /*
++ * ..., but the XEN guest kernels (currently) do:
++ * If the pte was reserved, it means it was created at boot
++ * time (not via split_large_page) and in turn we must not
++ * replace it with a large page.
++ */
++#ifndef CONFIG_XEN
++ BUG_ON(PageReserved(kpte_page));
++#else
++ if (PageReserved(kpte_page))
++ return 0;
++#endif
++
++ if (page_private(kpte_page) == 0) {
++ save_page(kpte_page);
++ revert_page(address, ref_prot);
++ }
++ return 0;
++}
++
++/*
++ * Change the page attributes of an page in the linear mapping.
++ *
++ * This should be used when a page is mapped with a different caching policy
++ * than write-back somewhere - some CPUs do not like it when mappings with
++ * different caching policies exist. This changes the page attributes of the
++ * in kernel linear mapping too.
++ *
++ * The caller needs to ensure that there are no conflicting mappings elsewhere.
++ * This function only deals with the kernel linear map.
++ *
++ * Caller must call global_flush_tlb() after this.
++ */
++int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
++{
++ int err = 0;
++ int i;
++
++ down_write(&init_mm.mmap_sem);
++ for (i = 0; i < numpages; i++, address += PAGE_SIZE) {
++ unsigned long pfn = __pa(address) >> PAGE_SHIFT;
++
++ err = __change_page_attr(address, pfn, prot, PAGE_KERNEL);
++ if (err)
++ break;
++ /* Handle kernel mapping too which aliases part of the
++ * lowmem */
++ if (__pa(address) < KERNEL_TEXT_SIZE) {
++ unsigned long addr2;
++ pgprot_t prot2 = prot;
++ addr2 = __START_KERNEL_map + __pa(address);
++ pgprot_val(prot2) &= ~_PAGE_NX;
++ err = __change_page_attr(addr2, pfn, prot2, PAGE_KERNEL_EXEC);
++ }
++ }
++ up_write(&init_mm.mmap_sem);
++ return err;
++}
++
++/* Don't call this for MMIO areas that may not have a mem_map entry */
++int change_page_attr(struct page *page, int numpages, pgprot_t prot)
++{
++ unsigned long addr = (unsigned long)page_address(page);
++ return change_page_attr_addr(addr, numpages, prot);
++}
++
++void global_flush_tlb(void)
++{
++ struct page *dpage;
++
++ down_read(&init_mm.mmap_sem);
++ dpage = xchg(&deferred_pages, NULL);
++ up_read(&init_mm.mmap_sem);
++
++ flush_map((dpage && !dpage->lru.next) ? (unsigned long)page_address(dpage) : 0);
++ while (dpage) {
++ struct page *tmp = dpage;
++ dpage = (struct page *)dpage->lru.next;
++ ClearPagePrivate(tmp);
++ __free_page(tmp);
++ }
++}
++
++EXPORT_SYMBOL(change_page_attr);
++EXPORT_SYMBOL(global_flush_tlb);
+Index: head-2008-11-25/drivers/pci/msi-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/pci/msi-xen.c 2008-10-13 13:43:45.000000000 +0200
+@@ -0,0 +1,809 @@
++/*
++ * File: msi.c
++ * Purpose: PCI Message Signaled Interrupt (MSI)
++ *
++ * Copyright (C) 2003-2004 Intel
++ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
++ */
++
++#include <linux/mm.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/init.h>
++#include <linux/ioport.h>
++#include <linux/smp_lock.h>
++#include <linux/pci.h>
++#include <linux/proc_fs.h>
++
++#include <xen/evtchn.h>
++
++#include <asm/errno.h>
++#include <asm/io.h>
++#include <asm/smp.h>
++
++#include "pci.h"
++#include "msi.h"
++
++static int pci_msi_enable = 1;
++
++static struct msi_ops *msi_ops;
++
++int msi_register(struct msi_ops *ops)
++{
++ msi_ops = ops;
++ return 0;
++}
++
++static LIST_HEAD(msi_dev_head);
++DEFINE_SPINLOCK(msi_dev_lock);
++
++struct msi_dev_list {
++ struct pci_dev *dev;
++ struct list_head list;
++ spinlock_t pirq_list_lock;
++ struct list_head pirq_list_head;
++};
++
++struct msi_pirq_entry {
++ struct list_head list;
++ int pirq;
++ int entry_nr;
++};
++
++static struct msi_dev_list *get_msi_dev_pirq_list(struct pci_dev *dev)
++{
++ struct msi_dev_list *msi_dev_list, *ret = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&msi_dev_lock, flags);
++
++ list_for_each_entry(msi_dev_list, &msi_dev_head, list)
++ if ( msi_dev_list->dev == dev )
++ ret = msi_dev_list;
++
++ if ( ret ) {
++ spin_unlock_irqrestore(&msi_dev_lock, flags);
++ return ret;
++ }
++
++ /* Has not allocate msi_dev until now. */
++ ret = kzalloc(sizeof(struct msi_dev_list), GFP_ATOMIC);
++
++ /* Failed to allocate msi_dev structure */
++ if ( !ret ) {
++ spin_unlock_irqrestore(&msi_dev_lock, flags);
++ return NULL;
++ }
++
++ ret->dev = dev;
++ spin_lock_init(&ret->pirq_list_lock);
++ INIT_LIST_HEAD(&ret->pirq_list_head);
++ list_add_tail(&ret->list, &msi_dev_head);
++ spin_unlock_irqrestore(&msi_dev_lock, flags);
++ return ret;
++}
++
++static int attach_pirq_entry(int pirq, int entry_nr,
++ struct msi_dev_list *msi_dev_entry)
++{
++ struct msi_pirq_entry *entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
++ unsigned long flags;
++
++ if (!entry)
++ return -ENOMEM;
++ entry->pirq = pirq;
++ entry->entry_nr = entry_nr;
++ spin_lock_irqsave(&msi_dev_entry->pirq_list_lock, flags);
++ list_add_tail(&entry->list, &msi_dev_entry->pirq_list_head);
++ spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
++ return 0;
++}
++
++static void detach_pirq_entry(int entry_nr,
++ struct msi_dev_list *msi_dev_entry)
++{
++ unsigned long flags;
++ struct msi_pirq_entry *pirq_entry;
++
++ list_for_each_entry(pirq_entry, &msi_dev_entry->pirq_list_head, list) {
++ if (pirq_entry->entry_nr == entry_nr) {
++ spin_lock_irqsave(&msi_dev_entry->pirq_list_lock, flags);
++ list_del(&pirq_entry->list);
++ spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
++ kfree(pirq_entry);
++ return;
++ }
++ }
++}
++
++/*
++ * pciback will provide device's owner
++ */
++static int (*get_owner)(struct pci_dev *dev);
++
++int register_msi_get_owner(int (*func)(struct pci_dev *dev))
++{
++ if (get_owner) {
++ printk(KERN_WARNING "register msi_get_owner again\n");
++ return -EEXIST;
++ }
++ get_owner = func;
++ return 0;
++}
++
++int unregister_msi_get_owner(int (*func)(struct pci_dev *dev))
++{
++ if (get_owner != func)
++ return -EINVAL;
++ get_owner = NULL;
++ return 0;
++}
++
++static int msi_get_dev_owner(struct pci_dev *dev)
++{
++ int owner;
++
++ BUG_ON(!is_initial_xendomain());
++ if (get_owner && (owner = get_owner(dev)) >= 0) {
++ printk(KERN_INFO "get owner for dev %x get %x \n",
++ dev->devfn, owner);
++ return owner;
++ }
++
++ return DOMID_SELF;
++}
++
++static int msi_unmap_pirq(struct pci_dev *dev, int pirq)
++{
++ struct physdev_unmap_pirq unmap;
++ int rc;
++
++ unmap.domid = msi_get_dev_owner(dev);
++ /* See comments in msi_map_pirq_to_vector, input parameter pirq
++ * mean irq number only if the device belongs to dom0 itself.
++ */
++ unmap.pirq = (unmap.domid != DOMID_SELF)
++ ? pirq : evtchn_get_xen_pirq(pirq);
++
++ if ((rc = HYPERVISOR_physdev_op(PHYSDEVOP_unmap_pirq, &unmap)))
++ printk(KERN_WARNING "unmap irq %x failed\n", pirq);
++
++ if (rc < 0)
++ return rc;
++
++ if (unmap.domid == DOMID_SELF)
++ evtchn_map_pirq(pirq, 0);
++
++ return 0;
++}
++
++static u64 find_table_base(struct pci_dev *dev, int pos)
++{
++ u8 bar;
++ u32 reg;
++ unsigned long flags;
++
++ pci_read_config_dword(dev, msix_table_offset_reg(pos), ®);
++ bar = reg & PCI_MSIX_FLAGS_BIRMASK;
++
++ flags = pci_resource_flags(dev, bar);
++ if (flags & (IORESOURCE_DISABLED | IORESOURCE_UNSET | IORESOURCE_BUSY))
++ return 0;
++
++ return pci_resource_start(dev, bar);
++}
++
++/*
++ * Protected by msi_lock
++ */
++static int msi_map_pirq_to_vector(struct pci_dev *dev, int pirq,
++ int entry_nr, u64 table_base)
++{
++ struct physdev_map_pirq map_irq;
++ int rc;
++ domid_t domid = DOMID_SELF;
++
++ domid = msi_get_dev_owner(dev);
++
++ map_irq.domid = domid;
++ map_irq.type = MAP_PIRQ_TYPE_MSI;
++ map_irq.index = -1;
++ map_irq.pirq = pirq < 0 ? -1 : evtchn_get_xen_pirq(pirq);
++ map_irq.bus = dev->bus->number;
++ map_irq.devfn = dev->devfn;
++ map_irq.entry_nr = entry_nr;
++ map_irq.table_base = table_base;
++
++ if ((rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq)))
++ printk(KERN_WARNING "map irq failed\n");
++
++ if (rc < 0)
++ return rc;
++ /* This happens when MSI support is not enabled in Xen. */
++ if (rc == 0 && map_irq.pirq < 0)
++ return -ENOSYS;
++
++ BUG_ON(map_irq.pirq <= 0);
++
++ /* If mapping of this particular MSI is on behalf of another domain,
++ * we do not need to get an irq in dom0. This also implies:
++ * dev->irq in dom0 will be 'Xen pirq' if this device belongs to
++ * to another domain, and will be 'Linux irq' if it belongs to dom0.
++ */
++ return ((domid != DOMID_SELF) ?
++ map_irq.pirq : evtchn_map_pirq(pirq, map_irq.pirq));
++}
++
++static int msi_map_vector(struct pci_dev *dev, int entry_nr, u64 table_base)
++{
++ return msi_map_pirq_to_vector(dev, -1, entry_nr, table_base);
++}
++
++static int msi_init(void)
++{
++ static int status = 0;
++
++ if (pci_msi_quirk) {
++ pci_msi_enable = 0;
++ printk(KERN_WARNING "PCI: MSI quirk detected. MSI disabled.\n");
++ status = -EINVAL;
++ }
++
++ return status;
++}
++
++void pci_scan_msi_device(struct pci_dev *dev) { }
++
++void disable_msi_mode(struct pci_dev *dev, int pos, int type)
++{
++ u16 control;
++
++ pci_read_config_word(dev, msi_control_reg(pos), &control);
++ if (type == PCI_CAP_ID_MSI) {
++ /* Set enabled bits to single MSI & enable MSI_enable bit */
++ msi_disable(control);
++ pci_write_config_word(dev, msi_control_reg(pos), control);
++ dev->msi_enabled = 0;
++ } else {
++ msix_disable(control);
++ pci_write_config_word(dev, msi_control_reg(pos), control);
++ dev->msix_enabled = 0;
++ }
++ if (pci_find_capability(dev, PCI_CAP_ID_EXP)) {
++ /* PCI Express Endpoint device detected */
++ pci_intx(dev, 1); /* enable intx */
++ }
++}
++
++static void enable_msi_mode(struct pci_dev *dev, int pos, int type)
++{
++ u16 control;
++
++ pci_read_config_word(dev, msi_control_reg(pos), &control);
++ if (type == PCI_CAP_ID_MSI) {
++ /* Set enabled bits to single MSI & enable MSI_enable bit */
++ msi_enable(control, 1);
++ pci_write_config_word(dev, msi_control_reg(pos), control);
++ dev->msi_enabled = 1;
++ } else {
++ msix_enable(control);
++ pci_write_config_word(dev, msi_control_reg(pos), control);
++ dev->msix_enabled = 1;
++ }
++ if (pci_find_capability(dev, PCI_CAP_ID_EXP)) {
++ /* PCI Express Endpoint device detected */
++ pci_intx(dev, 0); /* disable intx */
++ }
++}
++
++#ifdef CONFIG_PM
++int pci_save_msi_state(struct pci_dev *dev)
++{
++ int pos;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
++ if (pos <= 0 || dev->no_msi)
++ return 0;
++
++ if (!dev->msi_enabled)
++ return 0;
++
++ /* Restore dev->irq to its default pin-assertion vector */
++ msi_unmap_pirq(dev, dev->irq);
++ /* Disable MSI mode */
++ disable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
++ /* Set the flags for use of restore */
++ dev->msi_enabled = 1;
++ return 0;
++}
++
++void pci_restore_msi_state(struct pci_dev *dev)
++{
++ int pos, pirq;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
++ if (pos <= 0)
++ return;
++
++ if (!dev->msi_enabled)
++ return;
++
++ pirq = msi_map_pirq_to_vector(dev, dev->irq, 0, 0);
++ if (pirq < 0)
++ return;
++ enable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
++}
++
++int pci_save_msix_state(struct pci_dev *dev)
++{
++ int pos;
++ unsigned long flags;
++ struct msi_dev_list *msi_dev_entry;
++ struct msi_pirq_entry *pirq_entry, *tmp;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
++ if (pos <= 0 || dev->no_msi)
++ return 0;
++
++ /* save the capability */
++ if (!dev->msix_enabled)
++ return 0;
++
++ msi_dev_entry = get_msi_dev_pirq_list(dev);
++
++ spin_lock_irqsave(&msi_dev_entry->pirq_list_lock, flags);
++ list_for_each_entry_safe(pirq_entry, tmp,
++ &msi_dev_entry->pirq_list_head, list)
++ msi_unmap_pirq(dev, pirq_entry->pirq);
++ spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
++
++ disable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
++ /* Set the flags for use of restore */
++ dev->msix_enabled = 1;
++
++ return 0;
++}
++
++void pci_restore_msix_state(struct pci_dev *dev)
++{
++ int pos;
++ unsigned long flags;
++ u64 table_base;
++ struct msi_dev_list *msi_dev_entry;
++ struct msi_pirq_entry *pirq_entry, *tmp;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
++ if (pos <= 0)
++ return;
++
++ if (!dev->msix_enabled)
++ return;
++
++ msi_dev_entry = get_msi_dev_pirq_list(dev);
++ table_base = find_table_base(dev, pos);
++ if (!table_base)
++ return;
++
++ spin_lock_irqsave(&msi_dev_entry->pirq_list_lock, flags);
++ list_for_each_entry_safe(pirq_entry, tmp,
++ &msi_dev_entry->pirq_list_head, list) {
++ int rc = msi_map_pirq_to_vector(dev, pirq_entry->pirq,
++ pirq_entry->entry_nr, table_base);
++ if (rc < 0)
++ printk(KERN_WARNING
++ "%s: re-mapping irq #%d (pirq%d) failed: %d\n",
++ pci_name(dev), pirq_entry->entry_nr,
++ pirq_entry->pirq, rc);
++ }
++ spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
++
++ enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
++}
++#endif
++
++/**
++ * msi_capability_init - configure device's MSI capability structure
++ * @dev: pointer to the pci_dev data structure of MSI device function
++ *
++ * Setup the MSI capability structure of device function with a single
++ * MSI vector, regardless of device function is capable of handling
++ * multiple messages. A return of zero indicates the successful setup
++ * of an entry zero with the new MSI vector or non-zero for otherwise.
++ **/
++static int msi_capability_init(struct pci_dev *dev)
++{
++ int pos, pirq;
++ u16 control;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
++ pci_read_config_word(dev, msi_control_reg(pos), &control);
++
++ pirq = msi_map_vector(dev, 0, 0);
++ if (pirq < 0)
++ return -EBUSY;
++
++ dev->irq = pirq;
++ /* Set MSI enabled bits */
++ enable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
++ dev->msi_enabled = 1;
++
++ return 0;
++}
++
++/**
++ * msix_capability_init - configure device's MSI-X capability
++ * @dev: pointer to the pci_dev data structure of MSI-X device function
++ * @entries: pointer to an array of struct msix_entry entries
++ * @nvec: number of @entries
++ *
++ * Setup the MSI-X capability structure of device function with a
++ * single MSI-X vector. A return of zero indicates the successful setup of
++ * requested MSI-X entries with allocated vectors or non-zero for otherwise.
++ **/
++static int msix_capability_init(struct pci_dev *dev,
++ struct msix_entry *entries, int nvec)
++{
++ u64 table_base;
++ int pirq, i, j, mapped, pos;
++ struct msi_dev_list *msi_dev_entry = get_msi_dev_pirq_list(dev);
++ struct msi_pirq_entry *pirq_entry;
++
++ if (!msi_dev_entry)
++ return -ENOMEM;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
++ table_base = find_table_base(dev, pos);
++ if (!table_base)
++ return -ENODEV;
++
++ /* MSI-X Table Initialization */
++ for (i = 0; i < nvec; i++) {
++ mapped = 0;
++ list_for_each_entry(pirq_entry, &msi_dev_entry->pirq_list_head, list) {
++ if (pirq_entry->entry_nr == entries[i].entry) {
++ printk(KERN_WARNING "msix entry %d for dev %02x:%02x:%01x are \
++ not freed before acquire again.\n", entries[i].entry,
++ dev->bus->number, PCI_SLOT(dev->devfn),
++ PCI_FUNC(dev->devfn));
++ (entries + i)->vector = pirq_entry->pirq;
++ mapped = 1;
++ break;
++ }
++ }
++ if (mapped)
++ continue;
++ pirq = msi_map_vector(dev, entries[i].entry, table_base);
++ if (pirq < 0)
++ break;
++ attach_pirq_entry(pirq, entries[i].entry, msi_dev_entry);
++ (entries + i)->vector = pirq;
++ }
++
++ if (i != nvec) {
++ for (j = --i; j >= 0; j--) {
++ msi_unmap_pirq(dev, entries[j].vector);
++ detach_pirq_entry(entries[j].entry, msi_dev_entry);
++ entries[j].vector = 0;
++ }
++ return -EBUSY;
++ }
++
++ enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
++ dev->msix_enabled = 1;
++
++ return 0;
++}
++
++/**
++ * pci_enable_msi - configure device's MSI capability structure
++ * @dev: pointer to the pci_dev data structure of MSI device function
++ *
++ * Setup the MSI capability structure of device function with
++ * a single MSI vector upon its software driver call to request for
++ * MSI mode enabled on its hardware device function. A return of zero
++ * indicates the successful setup of an entry zero with the new MSI
++ * vector or non-zero for otherwise.
++ **/
++extern int pci_frontend_enable_msi(struct pci_dev *dev);
++int pci_enable_msi(struct pci_dev* dev)
++{
++ struct pci_bus *bus;
++ int pos, temp, status = -EINVAL;
++
++ if (!pci_msi_enable || !dev)
++ return status;
++
++ if (dev->no_msi)
++ return status;
++
++ for (bus = dev->bus; bus; bus = bus->parent)
++ if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
++ return -EINVAL;
++
++ status = msi_init();
++ if (status < 0)
++ return status;
++
++#ifdef CONFIG_XEN_PCIDEV_FRONTEND
++ if (!is_initial_xendomain())
++ {
++ int ret;
++
++ temp = dev->irq;
++ ret = pci_frontend_enable_msi(dev);
++ if (ret)
++ return ret;
++
++ dev->irq = evtchn_map_pirq(-1, dev->irq);
++ dev->irq_old = temp;
++
++ return ret;
++ }
++#endif
++
++ temp = dev->irq;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
++ if (!pos)
++ return -EINVAL;
++
++ /* Check whether driver already requested for MSI-X vectors */
++ if (dev->msix_enabled) {
++ printk(KERN_INFO "PCI: %s: Can't enable MSI. "
++ "Device already has MSI-X vectors assigned\n",
++ pci_name(dev));
++ dev->irq = temp;
++ return -EINVAL;
++ }
++
++ status = msi_capability_init(dev);
++ if ( !status )
++ dev->irq_old = temp;
++ else
++ dev->irq = temp;
++
++ return status;
++}
++
++extern void pci_frontend_disable_msi(struct pci_dev* dev);
++void pci_disable_msi(struct pci_dev* dev)
++{
++ int pos;
++ int pirq;
++
++ if (!pci_msi_enable)
++ return;
++ if (!dev)
++ return;
++
++#ifdef CONFIG_XEN_PCIDEV_FRONTEND
++ if (!is_initial_xendomain()) {
++ evtchn_map_pirq(dev->irq, 0);
++ pci_frontend_disable_msi(dev);
++ dev->irq = dev->irq_old;
++ return;
++ }
++#endif
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
++ if (!pos)
++ return;
++
++ pirq = dev->irq;
++ /* Restore dev->irq to its default pin-assertion vector */
++ dev->irq = dev->irq_old;
++ msi_unmap_pirq(dev, pirq);
++
++ /* Disable MSI mode */
++ disable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
++}
++
++/**
++ * pci_enable_msix - configure device's MSI-X capability structure
++ * @dev: pointer to the pci_dev data structure of MSI-X device function
++ * @entries: pointer to an array of MSI-X entries
++ * @nvec: number of MSI-X vectors requested for allocation by device driver
++ *
++ * Setup the MSI-X capability structure of device function with the number
++ * of requested vectors upon its software driver call to request for
++ * MSI-X mode enabled on its hardware device function. A return of zero
++ * indicates the successful configuration of MSI-X capability structure
++ * with new allocated MSI-X vectors. A return of < 0 indicates a failure.
++ * Or a return of > 0 indicates that driver request is exceeding the number
++ * of vectors available. Driver should use the returned value to re-send
++ * its request.
++ **/
++extern int pci_frontend_enable_msix(struct pci_dev *dev,
++ struct msix_entry *entries, int nvec);
++int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec)
++{
++ struct pci_bus *bus;
++ int status, pos, nr_entries;
++ int i, j, temp;
++ u16 control;
++
++ if (!pci_msi_enable || !dev || !entries)
++ return -EINVAL;
++
++ if (dev->no_msi)
++ return -EINVAL;
++
++ for (bus = dev->bus; bus; bus = bus->parent)
++ if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
++ return -EINVAL;
++
++#ifdef CONFIG_XEN_PCIDEV_FRONTEND
++ if (!is_initial_xendomain()) {
++ struct msi_dev_list *msi_dev_entry;
++ struct msi_pirq_entry *pirq_entry;
++ int ret, irq;
++
++ ret = pci_frontend_enable_msix(dev, entries, nvec);
++ if (ret) {
++ printk("get %x from pci_frontend_enable_msix\n", ret);
++ return ret;
++ }
++
++ msi_dev_entry = get_msi_dev_pirq_list(dev);
++ for (i = 0; i < nvec; i++) {
++ int mapped = 0;
++
++ list_for_each_entry(pirq_entry, &msi_dev_entry->pirq_list_head, list) {
++ if (pirq_entry->entry_nr == entries[i].entry) {
++ irq = pirq_entry->pirq;
++ BUG_ON(entries[i].vector != evtchn_get_xen_pirq(irq));
++ entries[i].vector = irq;
++ mapped = 1;
++ break;
++ }
++ }
++ if (mapped)
++ continue;
++ irq = evtchn_map_pirq(-1, entries[i].vector);
++ attach_pirq_entry(irq, entries[i].entry, msi_dev_entry);
++ entries[i].vector = irq;
++ }
++ return 0;
++ }
++#endif
++
++ status = msi_init();
++ if (status < 0)
++ return status;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
++ if (!pos)
++ return -EINVAL;
++
++ pci_read_config_word(dev, msi_control_reg(pos), &control);
++ nr_entries = multi_msix_capable(control);
++ if (nvec > nr_entries)
++ return -EINVAL;
++
++ /* Check for any invalid entries */
++ for (i = 0; i < nvec; i++) {
++ if (entries[i].entry >= nr_entries)
++ return -EINVAL; /* invalid entry */
++ for (j = i + 1; j < nvec; j++) {
++ if (entries[i].entry == entries[j].entry)
++ return -EINVAL; /* duplicate entry */
++ }
++ }
++
++ temp = dev->irq;
++ /* Check whether driver already requested for MSI vector */
++ if (dev->msi_enabled) {
++ printk(KERN_INFO "PCI: %s: Can't enable MSI-X. "
++ "Device already has an MSI vector assigned\n",
++ pci_name(dev));
++ dev->irq = temp;
++ return -EINVAL;
++ }
++
++ status = msix_capability_init(dev, entries, nvec);
++
++ if ( !status )
++ dev->irq_old = temp;
++ else
++ dev->irq = temp;
++
++ return status;
++}
++
++extern void pci_frontend_disable_msix(struct pci_dev* dev);
++void pci_disable_msix(struct pci_dev* dev)
++{
++ int pos;
++ u16 control;
++
++
++ if (!pci_msi_enable)
++ return;
++ if (!dev)
++ return;
++
++#ifdef CONFIG_XEN_PCIDEV_FRONTEND
++ if (!is_initial_xendomain()) {
++ struct msi_dev_list *msi_dev_entry;
++ struct msi_pirq_entry *pirq_entry, *tmp;
++
++ pci_frontend_disable_msix(dev);
++
++ msi_dev_entry = get_msi_dev_pirq_list(dev);
++ list_for_each_entry_safe(pirq_entry, tmp,
++ &msi_dev_entry->pirq_list_head, list) {
++ evtchn_map_pirq(pirq_entry->pirq, 0);
++ list_del(&pirq_entry->list);
++ kfree(pirq_entry);
++ }
++
++ dev->irq = dev->irq_old;
++ return;
++ }
++#endif
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
++ if (!pos)
++ return;
++
++ pci_read_config_word(dev, msi_control_reg(pos), &control);
++ if (!(control & PCI_MSIX_FLAGS_ENABLE))
++ return;
++
++ msi_remove_pci_irq_vectors(dev);
++
++ /* Disable MSI mode */
++ disable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
++}
++
++/**
++ * msi_remove_pci_irq_vectors - reclaim MSI(X) vectors to unused state
++ * @dev: pointer to the pci_dev data structure of MSI(X) device function
++ *
++ * Being called during hotplug remove, from which the device function
++ * is hot-removed. All previous assigned MSI/MSI-X vectors, if
++ * allocated for this device function, are reclaimed to unused state,
++ * which may be used later on.
++ **/
++void msi_remove_pci_irq_vectors(struct pci_dev* dev)
++{
++ unsigned long flags;
++ struct msi_dev_list *msi_dev_entry;
++ struct msi_pirq_entry *pirq_entry, *tmp;
++
++ if (!pci_msi_enable || !dev)
++ return;
++
++ msi_dev_entry = get_msi_dev_pirq_list(dev);
++
++ spin_lock_irqsave(&msi_dev_entry->pirq_list_lock, flags);
++ if (!list_empty(&msi_dev_entry->pirq_list_head))
++ {
++ printk(KERN_WARNING "msix pirqs for dev %02x:%02x:%01x are not freed \
++ before acquire again.\n", dev->bus->number, PCI_SLOT(dev->devfn),
++ PCI_FUNC(dev->devfn));
++ list_for_each_entry_safe(pirq_entry, tmp,
++ &msi_dev_entry->pirq_list_head, list) {
++ msi_unmap_pirq(dev, pirq_entry->pirq);
++ list_del(&pirq_entry->list);
++ kfree(pirq_entry);
++ }
++ }
++ spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
++ dev->irq = dev->irq_old;
++}
++
++void pci_no_msi(void)
++{
++ pci_msi_enable = 0;
++}
++
++EXPORT_SYMBOL(pci_enable_msi);
++EXPORT_SYMBOL(pci_disable_msi);
++EXPORT_SYMBOL(pci_enable_msix);
++EXPORT_SYMBOL(pci_disable_msix);
++#ifdef CONFIG_XEN
++EXPORT_SYMBOL(register_msi_get_owner);
++EXPORT_SYMBOL(unregister_msi_get_owner);
++#endif
++
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/agp.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/agp.h 2007-06-22 09:08:06.000000000 +0200
+@@ -0,0 +1,44 @@
++#ifndef AGP_H
++#define AGP_H 1
++
++#include <asm/pgtable.h>
++#include <asm/cacheflush.h>
++#include <asm/system.h>
++
++/*
++ * Functions to keep the agpgart mappings coherent with the MMU.
++ * The GART gives the CPU a physical alias of pages in memory. The alias region is
++ * mapped uncacheable. Make sure there are no conflicting mappings
++ * with different cachability attributes for the same page. This avoids
++ * data corruption on some CPUs.
++ */
++
++/* Caller's responsibility to call global_flush_tlb() for
++ * performance reasons */
++#define map_page_into_agp(page) ( \
++ xen_create_contiguous_region((unsigned long)page_address(page), 0, 32) \
++ ?: change_page_attr(page, 1, PAGE_KERNEL_NOCACHE))
++#define unmap_page_from_agp(page) ( \
++ xen_destroy_contiguous_region((unsigned long)page_address(page), 0), \
++ /* only a fallback: xen_destroy_contiguous_region uses PAGE_KERNEL */ \
++ change_page_attr(page, 1, PAGE_KERNEL))
++#define flush_agp_mappings() global_flush_tlb()
++
++/* Could use CLFLUSH here if the cpu supports it. But then it would
++ need to be called for each cacheline of the whole page so it may not be
++ worth it. Would need a page for it. */
++#define flush_agp_cache() wbinvd()
++
++/* Convert a physical address to an address suitable for the GART. */
++#define phys_to_gart(x) phys_to_machine(x)
++#define gart_to_phys(x) machine_to_phys(x)
++
++/* GATT allocation. Returns/accepts GATT kernel virtual address. */
++#define alloc_gatt_pages(order) ({ \
++ char *_t; dma_addr_t _d; \
++ _t = dma_alloc_coherent(NULL,PAGE_SIZE<<(order),&_d,GFP_KERNEL); \
++ _t; })
++#define free_gatt_pages(table, order) \
++ dma_free_coherent(NULL,PAGE_SIZE<<(order),(table),virt_to_bus(table))
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/desc_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/desc_32.h 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,166 @@
++#ifndef __ARCH_DESC_H
++#define __ARCH_DESC_H
++
++#include <asm/ldt.h>
++#include <asm/segment.h>
++
++#define CPU_16BIT_STACK_SIZE 1024
++
++#ifndef __ASSEMBLY__
++
++#include <linux/preempt.h>
++#include <linux/smp.h>
++
++#include <asm/mmu.h>
++
++extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
++
++DECLARE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
++
++struct Xgt_desc_struct {
++ unsigned short size;
++ unsigned long address __attribute__((packed));
++ unsigned short pad;
++} __attribute__ ((packed));
++
++extern struct Xgt_desc_struct idt_descr;
++DECLARE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
++
++
++static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
++{
++ return (struct desc_struct *)per_cpu(cpu_gdt_descr, cpu).address;
++}
++
++#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
++#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8))
++
++#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr))
++#define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr))
++#define load_tr(tr) __asm__ __volatile("ltr %0"::"mr" (tr))
++#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"mr" (ldt))
++
++#define store_gdt(dtr) __asm__ ("sgdt %0":"=m" (*dtr))
++#define store_idt(dtr) __asm__ ("sidt %0":"=m" (*dtr))
++#define store_tr(tr) __asm__ ("str %0":"=mr" (tr))
++#define store_ldt(ldt) __asm__ ("sldt %0":"=mr" (ldt))
++
++/*
++ * This is the ldt that every process will get unless we need
++ * something other than this.
++ */
++extern struct desc_struct default_ldt[];
++extern void set_intr_gate(unsigned int irq, void * addr);
++
++#define _set_tssldt_desc(n,addr,limit,type) \
++__asm__ __volatile__ ("movw %w3,0(%2)\n\t" \
++ "movw %w1,2(%2)\n\t" \
++ "rorl $16,%1\n\t" \
++ "movb %b1,4(%2)\n\t" \
++ "movb %4,5(%2)\n\t" \
++ "movb $0,6(%2)\n\t" \
++ "movb %h1,7(%2)\n\t" \
++ "rorl $16,%1" \
++ : "=m"(*(n)) : "q" (addr), "r"(n), "ir"(limit), "i"(type))
++
++#ifndef CONFIG_X86_NO_TSS
++static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, void *addr)
++{
++ _set_tssldt_desc(&get_cpu_gdt_table(cpu)[entry], (int)addr,
++ offsetof(struct tss_struct, __cacheline_filler) - 1, 0x89);
++}
++
++#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
++#endif
++
++static inline void set_ldt_desc(unsigned int cpu, void *addr, unsigned int size)
++{
++ _set_tssldt_desc(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT], (int)addr, ((size << 3)-1), 0x82);
++}
++
++#define LDT_entry_a(info) \
++ ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
++
++#define LDT_entry_b(info) \
++ (((info)->base_addr & 0xff000000) | \
++ (((info)->base_addr & 0x00ff0000) >> 16) | \
++ ((info)->limit & 0xf0000) | \
++ (((info)->read_exec_only ^ 1) << 9) | \
++ ((info)->contents << 10) | \
++ (((info)->seg_not_present ^ 1) << 15) | \
++ ((info)->seg_32bit << 22) | \
++ ((info)->limit_in_pages << 23) | \
++ ((info)->useable << 20) | \
++ 0x7000)
++
++#define LDT_empty(info) (\
++ (info)->base_addr == 0 && \
++ (info)->limit == 0 && \
++ (info)->contents == 0 && \
++ (info)->read_exec_only == 1 && \
++ (info)->seg_32bit == 0 && \
++ (info)->limit_in_pages == 0 && \
++ (info)->seg_not_present == 1 && \
++ (info)->useable == 0 )
++
++extern int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b);
++
++#if TLS_SIZE != 24
++# error update this code.
++#endif
++
++static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
++{
++#define C(i) if (HYPERVISOR_update_descriptor(virt_to_machine(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i]), \
++ *(u64 *)&t->tls_array[i])) \
++ BUG();
++ C(0); C(1); C(2);
++#undef C
++}
++
++static inline void clear_LDT(void)
++{
++ int cpu = get_cpu();
++
++ /*
++ * NB. We load the default_ldt for lcall7/27 handling on demand, as
++ * it slows down context switching. Noone uses it anyway.
++ */
++ cpu = cpu; /* XXX avoid compiler warning */
++ xen_set_ldt(NULL, 0);
++ put_cpu();
++}
++
++/*
++ * load one particular LDT into the current CPU
++ */
++static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
++{
++ void *segments = pc->ldt;
++ int count = pc->size;
++
++ if (likely(!count))
++ segments = NULL;
++
++ xen_set_ldt(segments, count);
++}
++
++static inline void load_LDT(mm_context_t *pc)
++{
++ int cpu = get_cpu();
++ load_LDT_nolock(pc, cpu);
++ put_cpu();
++}
++
++static inline unsigned long get_desc_base(unsigned long *desc)
++{
++ unsigned long base;
++ base = ((desc[0] >> 16) & 0x0000ffff) |
++ ((desc[1] << 16) & 0x00ff0000) |
++ (desc[1] & 0xff000000);
++ return base;
++}
++
++#endif /* !__ASSEMBLY__ */
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/dma-mapping_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/dma-mapping_32.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,151 @@
++#ifndef _ASM_I386_DMA_MAPPING_H
++#define _ASM_I386_DMA_MAPPING_H
++
++/*
++ * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
++ * documentation.
++ */
++
++#include <linux/mm.h>
++#include <asm/cache.h>
++#include <asm/io.h>
++#include <asm/scatterlist.h>
++#include <asm/swiotlb.h>
++
++static inline int
++address_needs_mapping(struct device *hwdev, dma_addr_t addr)
++{
++ dma_addr_t mask = 0xffffffff;
++ /* If the device has a mask, use it, otherwise default to 32 bits */
++ if (hwdev && hwdev->dma_mask)
++ mask = *hwdev->dma_mask;
++ return (addr & ~mask) != 0;
++}
++
++extern int range_straddles_page_boundary(paddr_t p, size_t size);
++
++#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
++#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
++
++void *dma_alloc_coherent(struct device *dev, size_t size,
++ dma_addr_t *dma_handle, gfp_t flag);
++
++void dma_free_coherent(struct device *dev, size_t size,
++ void *vaddr, dma_addr_t dma_handle);
++
++extern dma_addr_t
++dma_map_single(struct device *dev, void *ptr, size_t size,
++ enum dma_data_direction direction);
++
++extern void
++dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
++ enum dma_data_direction direction);
++
++extern int dma_map_sg(struct device *hwdev, struct scatterlist *sg,
++ int nents, enum dma_data_direction direction);
++extern void dma_unmap_sg(struct device *hwdev, struct scatterlist *sg,
++ int nents, enum dma_data_direction direction);
++
++#ifdef CONFIG_HIGHMEM
++extern dma_addr_t
++dma_map_page(struct device *dev, struct page *page, unsigned long offset,
++ size_t size, enum dma_data_direction direction);
++
++extern void
++dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
++ enum dma_data_direction direction);
++#else
++#define dma_map_page(dev, page, offset, size, dir) \
++ dma_map_single(dev, page_address(page) + (offset), (size), (dir))
++#define dma_unmap_page dma_unmap_single
++#endif
++
++extern void
++dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
++ enum dma_data_direction direction);
++
++extern void
++dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
++ enum dma_data_direction direction);
++
++static inline void
++dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
++ unsigned long offset, size_t size,
++ enum dma_data_direction direction)
++{
++ dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
++}
++
++static inline void
++dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
++ unsigned long offset, size_t size,
++ enum dma_data_direction direction)
++{
++ dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
++}
++
++static inline void
++dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
++ enum dma_data_direction direction)
++{
++ if (swiotlb)
++ swiotlb_sync_sg_for_cpu(dev,sg,nelems,direction);
++ flush_write_buffers();
++}
++
++static inline void
++dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
++ enum dma_data_direction direction)
++{
++ if (swiotlb)
++ swiotlb_sync_sg_for_device(dev,sg,nelems,direction);
++ flush_write_buffers();
++}
++
++extern int
++dma_mapping_error(dma_addr_t dma_addr);
++
++extern int
++dma_supported(struct device *dev, u64 mask);
++
++static inline int
++dma_set_mask(struct device *dev, u64 mask)
++{
++ if(!dev->dma_mask || !dma_supported(dev, mask))
++ return -EIO;
++
++ *dev->dma_mask = mask;
++
++ return 0;
++}
++
++static inline int
++dma_get_cache_alignment(void)
++{
++ /* no easy way to get cache size on all x86, so return the
++ * maximum possible, to be safe */
++ return (1 << INTERNODE_CACHE_SHIFT);
++}
++
++#define dma_is_consistent(d) (1)
++
++static inline void
++dma_cache_sync(void *vaddr, size_t size,
++ enum dma_data_direction direction)
++{
++ flush_write_buffers();
++}
++
++#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
++extern int
++dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
++ dma_addr_t device_addr, size_t size, int flags);
++
++extern void
++dma_release_declared_memory(struct device *dev);
++
++extern void *
++dma_mark_declared_memory_occupied(struct device *dev,
++ dma_addr_t device_addr, size_t size);
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/fixmap_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/fixmap_32.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,155 @@
++/*
++ * fixmap.h: compile-time virtual memory allocation
++ *
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 1998 Ingo Molnar
++ *
++ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
++ */
++
++#ifndef _ASM_FIXMAP_H
++#define _ASM_FIXMAP_H
++
++
++/* used by vmalloc.c, vsyscall.lds.S.
++ *
++ * Leave one empty page between vmalloc'ed areas and
++ * the start of the fixmap.
++ */
++extern unsigned long __FIXADDR_TOP;
++
++#ifndef __ASSEMBLY__
++#include <linux/kernel.h>
++#include <asm/acpi.h>
++#include <asm/apicdef.h>
++#include <asm/page.h>
++#ifdef CONFIG_HIGHMEM
++#include <linux/threads.h>
++#include <asm/kmap_types.h>
++#endif
++
++/*
++ * Here we define all the compile-time 'special' virtual
++ * addresses. The point is to have a constant address at
++ * compile time, but to set the physical address only
++ * in the boot process. We allocate these special addresses
++ * from the end of virtual memory (0xfffff000) backwards.
++ * Also this lets us do fail-safe vmalloc(), we
++ * can guarantee that these special addresses and
++ * vmalloc()-ed addresses never overlap.
++ *
++ * these 'compile-time allocated' memory buffers are
++ * fixed-size 4k pages. (or larger if used with an increment
++ * highger than 1) use fixmap_set(idx,phys) to associate
++ * physical memory with fixmap indices.
++ *
++ * TLB entries of such buffers will not be flushed across
++ * task switches.
++ */
++enum fixed_addresses {
++ FIX_HOLE,
++ FIX_VDSO,
++#ifdef CONFIG_X86_LOCAL_APIC
++ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
++#endif
++#ifdef CONFIG_X86_IO_APIC
++ FIX_IO_APIC_BASE_0,
++ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
++#endif
++#ifdef CONFIG_X86_VISWS_APIC
++ FIX_CO_CPU, /* Cobalt timer */
++ FIX_CO_APIC, /* Cobalt APIC Redirection Table */
++ FIX_LI_PCIA, /* Lithium PCI Bridge A */
++ FIX_LI_PCIB, /* Lithium PCI Bridge B */
++#endif
++#ifdef CONFIG_X86_F00F_BUG
++ FIX_F00F_IDT, /* Virtual mapping for IDT */
++#endif
++#ifdef CONFIG_X86_CYCLONE_TIMER
++ FIX_CYCLONE_TIMER, /*cyclone timer register*/
++#endif
++#ifdef CONFIG_HIGHMEM
++ FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
++ FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
++#endif
++#ifdef CONFIG_ACPI
++ FIX_ACPI_BEGIN,
++ FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
++#endif
++#ifdef CONFIG_PCI_MMCONFIG
++ FIX_PCIE_MCFG,
++#endif
++ FIX_SHARED_INFO,
++#define NR_FIX_ISAMAPS 256
++ FIX_ISAMAP_END,
++ FIX_ISAMAP_BEGIN = FIX_ISAMAP_END + NR_FIX_ISAMAPS - 1,
++ __end_of_permanent_fixed_addresses,
++ /* temporary boot-time mappings, used before ioremap() is functional */
++#define NR_FIX_BTMAPS 16
++ FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
++ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS - 1,
++ FIX_WP_TEST,
++ __end_of_fixed_addresses
++};
++
++extern void set_fixaddr_top(unsigned long top);
++
++extern void __set_fixmap(enum fixed_addresses idx,
++ maddr_t phys, pgprot_t flags);
++
++#define set_fixmap(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL)
++/*
++ * Some hardware wants to get fixmapped without caching.
++ */
++#define set_fixmap_nocache(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
++
++#define clear_fixmap(idx) \
++ __set_fixmap(idx, 0, __pgprot(0))
++
++#define FIXADDR_TOP ((unsigned long)__FIXADDR_TOP)
++
++#define __FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT)
++#define __FIXADDR_BOOT_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
++#define FIXADDR_START (FIXADDR_TOP - __FIXADDR_SIZE)
++#define FIXADDR_BOOT_START (FIXADDR_TOP - __FIXADDR_BOOT_SIZE)
++
++#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
++#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
++
++extern void __this_fixmap_does_not_exist(void);
++
++/*
++ * 'index to address' translation. If anyone tries to use the idx
++ * directly without tranlation, we catch the bug with a NULL-deference
++ * kernel oops. Illegal ranges of incoming indices are caught too.
++ */
++static __always_inline unsigned long fix_to_virt(const unsigned int idx)
++{
++ /*
++ * this branch gets completely eliminated after inlining,
++ * except when someone tries to use fixaddr indices in an
++ * illegal way. (such as mixing up address types or using
++ * out-of-range indices).
++ *
++ * If it doesn't get removed, the linker will complain
++ * loudly with a reasonably clear error message..
++ */
++ if (idx >= __end_of_fixed_addresses)
++ __this_fixmap_does_not_exist();
++
++ return __fix_to_virt(idx);
++}
++
++static inline unsigned long virt_to_fix(const unsigned long vaddr)
++{
++ BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
++ return __virt_to_fix(vaddr);
++}
++
++#endif /* !__ASSEMBLY__ */
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/gnttab_dma.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/gnttab_dma.h 2007-08-06 15:10:49.000000000 +0200
+@@ -0,0 +1,41 @@
++/*
++ * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
++ * Copyright (c) 2007 Isaku Yamahata <yamahata at valinux co jp>
++ * VA Linux Systems Japan K.K.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ */
++
++#ifndef _ASM_I386_GNTTAB_DMA_H
++#define _ASM_I386_GNTTAB_DMA_H
++
++static inline int gnttab_dma_local_pfn(struct page *page)
++{
++ /* Has it become a local MFN? */
++ return pfn_valid(mfn_to_local_pfn(pfn_to_mfn(page_to_pfn(page))));
++}
++
++static inline maddr_t gnttab_dma_map_page(struct page *page)
++{
++ __gnttab_dma_map_page(page);
++ return ((maddr_t)pfn_to_mfn(page_to_pfn(page)) << PAGE_SHIFT);
++}
++
++static inline void gnttab_dma_unmap_page(maddr_t maddr)
++{
++ __gnttab_dma_unmap_page(virt_to_page(bus_to_virt(maddr)));
++}
++
++#endif /* _ASM_I386_GNTTAB_DMA_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/highmem.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/highmem.h 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,97 @@
++/*
++ * highmem.h: virtual kernel memory mappings for high memory
++ *
++ * Used in CONFIG_HIGHMEM systems for memory pages which
++ * are not addressable by direct kernel virtual addresses.
++ *
++ * Copyright (C) 1999 Gerhard Wichert, Siemens AG
++ * Gerhard.Wichert@pdb.siemens.de
++ *
++ *
++ * Redesigned the x86 32-bit VM architecture to deal with
++ * up to 16 Terabyte physical memory. With current x86 CPUs
++ * we now support up to 64 Gigabytes physical RAM.
++ *
++ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
++ */
++
++#ifndef _ASM_HIGHMEM_H
++#define _ASM_HIGHMEM_H
++
++#ifdef __KERNEL__
++
++#include <linux/interrupt.h>
++#include <linux/threads.h>
++#include <asm/kmap_types.h>
++#include <asm/tlbflush.h>
++
++/* declarations for highmem.c */
++extern unsigned long highstart_pfn, highend_pfn;
++
++extern pte_t *kmap_pte;
++extern pgprot_t kmap_prot;
++extern pte_t *pkmap_page_table;
++
++/*
++ * Right now we initialize only a single pte table. It can be extended
++ * easily, subsequent pte tables have to be allocated in one physical
++ * chunk of RAM.
++ */
++#ifdef CONFIG_X86_PAE
++#define LAST_PKMAP 512
++#else
++#define LAST_PKMAP 1024
++#endif
++/*
++ * Ordering is:
++ *
++ * FIXADDR_TOP
++ * fixed_addresses
++ * FIXADDR_START
++ * temp fixed addresses
++ * FIXADDR_BOOT_START
++ * Persistent kmap area
++ * PKMAP_BASE
++ * VMALLOC_END
++ * Vmalloc area
++ * VMALLOC_START
++ * high_memory
++ */
++#define PKMAP_BASE ( (FIXADDR_BOOT_START - PAGE_SIZE*(LAST_PKMAP + 1)) & PMD_MASK )
++#define LAST_PKMAP_MASK (LAST_PKMAP-1)
++#define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT)
++#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
++
++extern void * FASTCALL(kmap_high(struct page *page));
++extern void FASTCALL(kunmap_high(struct page *page));
++
++void *kmap(struct page *page);
++void kunmap(struct page *page);
++void *kmap_atomic(struct page *page, enum km_type type);
++void *kmap_atomic_pte(struct page *page, enum km_type type);
++void kunmap_atomic(void *kvaddr, enum km_type type);
++void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
++struct page *kmap_atomic_to_page(void *ptr);
++
++#define flush_cache_kmaps() do { } while (0)
++
++void clear_highpage(struct page *);
++static inline void clear_user_highpage(struct page *page, unsigned long vaddr)
++{
++ clear_highpage(page);
++}
++#define __HAVE_ARCH_CLEAR_HIGHPAGE
++#define __HAVE_ARCH_CLEAR_USER_HIGHPAGE
++
++void copy_highpage(struct page *to, struct page *from);
++static inline void copy_user_highpage(struct page *to, struct page *from,
++ unsigned long vaddr)
++{
++ copy_highpage(to, from);
++}
++#define __HAVE_ARCH_COPY_HIGHPAGE
++#define __HAVE_ARCH_COPY_USER_HIGHPAGE
++
++#endif /* __KERNEL__ */
++
++#endif /* _ASM_HIGHMEM_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/hypercall_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/hypercall_32.h 2008-11-25 12:22:34.000000000 +0100
+@@ -0,0 +1,409 @@
++/******************************************************************************
++ * hypercall.h
++ *
++ * Linux-specific hypervisor handling.
++ *
++ * Copyright (c) 2002-2004, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __HYPERCALL_H__
++#define __HYPERCALL_H__
++
++#include <linux/string.h> /* memcpy() */
++#include <linux/stringify.h>
++
++#ifndef __HYPERVISOR_H__
++# error "please don't include this file directly"
++#endif
++
++#ifdef CONFIG_XEN
++#define HYPERCALL_STR(name) \
++ "call hypercall_page + ("__stringify(__HYPERVISOR_##name)" * 32)"
++#else
++#define HYPERCALL_STR(name) \
++ "mov hypercall_stubs,%%eax; " \
++ "add $("__stringify(__HYPERVISOR_##name)" * 32),%%eax; "\
++ "call *%%eax"
++#endif
++
++#define _hypercall0(type, name) \
++({ \
++ type __res; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res) \
++ : \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall1(type, name, a1) \
++({ \
++ type __res; \
++ long __ign1; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=b" (__ign1) \
++ : "1" ((long)(a1)) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall2(type, name, a1, a2) \
++({ \
++ type __res; \
++ long __ign1, __ign2; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=b" (__ign1), "=c" (__ign2) \
++ : "1" ((long)(a1)), "2" ((long)(a2)) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall3(type, name, a1, a2, a3) \
++({ \
++ type __res; \
++ long __ign1, __ign2, __ign3; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
++ "=d" (__ign3) \
++ : "1" ((long)(a1)), "2" ((long)(a2)), \
++ "3" ((long)(a3)) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall4(type, name, a1, a2, a3, a4) \
++({ \
++ type __res; \
++ long __ign1, __ign2, __ign3, __ign4; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
++ "=d" (__ign3), "=S" (__ign4) \
++ : "1" ((long)(a1)), "2" ((long)(a2)), \
++ "3" ((long)(a3)), "4" ((long)(a4)) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
++({ \
++ type __res; \
++ long __ign1, __ign2, __ign3, __ign4, __ign5; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
++ "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \
++ : "1" ((long)(a1)), "2" ((long)(a2)), \
++ "3" ((long)(a3)), "4" ((long)(a4)), \
++ "5" ((long)(a5)) \
++ : "memory" ); \
++ __res; \
++})
++
++static inline int __must_check
++HYPERVISOR_set_trap_table(
++ const trap_info_t *table)
++{
++ return _hypercall1(int, set_trap_table, table);
++}
++
++static inline int __must_check
++HYPERVISOR_mmu_update(
++ mmu_update_t *req, unsigned int count, unsigned int *success_count,
++ domid_t domid)
++{
++ return _hypercall4(int, mmu_update, req, count, success_count, domid);
++}
++
++static inline int __must_check
++HYPERVISOR_mmuext_op(
++ struct mmuext_op *op, unsigned int count, unsigned int *success_count,
++ domid_t domid)
++{
++ return _hypercall4(int, mmuext_op, op, count, success_count, domid);
++}
++
++static inline int __must_check
++HYPERVISOR_set_gdt(
++ unsigned long *frame_list, unsigned int entries)
++{
++ return _hypercall2(int, set_gdt, frame_list, entries);
++}
++
++static inline int __must_check
++HYPERVISOR_stack_switch(
++ unsigned long ss, unsigned long esp)
++{
++ return _hypercall2(int, stack_switch, ss, esp);
++}
++
++static inline int __must_check
++HYPERVISOR_set_callbacks(
++ unsigned long event_selector, unsigned long event_address,
++ unsigned long failsafe_selector, unsigned long failsafe_address)
++{
++ return _hypercall4(int, set_callbacks,
++ event_selector, event_address,
++ failsafe_selector, failsafe_address);
++}
++
++static inline int
++HYPERVISOR_fpu_taskswitch(
++ int set)
++{
++ return _hypercall1(int, fpu_taskswitch, set);
++}
++
++static inline int __must_check
++HYPERVISOR_sched_op_compat(
++ int cmd, unsigned long arg)
++{
++ return _hypercall2(int, sched_op_compat, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_sched_op(
++ int cmd, void *arg)
++{
++ return _hypercall2(int, sched_op, cmd, arg);
++}
++
++static inline long __must_check
++HYPERVISOR_set_timer_op(
++ u64 timeout)
++{
++ unsigned long timeout_hi = (unsigned long)(timeout>>32);
++ unsigned long timeout_lo = (unsigned long)timeout;
++ return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
++}
++
++static inline int __must_check
++HYPERVISOR_platform_op(
++ struct xen_platform_op *platform_op)
++{
++ platform_op->interface_version = XENPF_INTERFACE_VERSION;
++ return _hypercall1(int, platform_op, platform_op);
++}
++
++static inline int __must_check
++HYPERVISOR_set_debugreg(
++ unsigned int reg, unsigned long value)
++{
++ return _hypercall2(int, set_debugreg, reg, value);
++}
++
++static inline unsigned long __must_check
++HYPERVISOR_get_debugreg(
++ unsigned int reg)
++{
++ return _hypercall1(unsigned long, get_debugreg, reg);
++}
++
++static inline int __must_check
++HYPERVISOR_update_descriptor(
++ u64 ma, u64 desc)
++{
++ return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
++}
++
++static inline int __must_check
++HYPERVISOR_memory_op(
++ unsigned int cmd, void *arg)
++{
++ return _hypercall2(int, memory_op, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_multicall(
++ multicall_entry_t *call_list, unsigned int nr_calls)
++{
++ return _hypercall2(int, multicall, call_list, nr_calls);
++}
++
++static inline int __must_check
++HYPERVISOR_update_va_mapping(
++ unsigned long va, pte_t new_val, unsigned long flags)
++{
++ unsigned long pte_hi = 0;
++#ifdef CONFIG_X86_PAE
++ pte_hi = new_val.pte_high;
++#endif
++ return _hypercall4(int, update_va_mapping, va,
++ new_val.pte_low, pte_hi, flags);
++}
++
++static inline int __must_check
++HYPERVISOR_event_channel_op(
++ int cmd, void *arg)
++{
++ int rc = _hypercall2(int, event_channel_op, cmd, arg);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ struct evtchn_op op;
++ op.cmd = cmd;
++ memcpy(&op.u, arg, sizeof(op.u));
++ rc = _hypercall1(int, event_channel_op_compat, &op);
++ memcpy(arg, &op.u, sizeof(op.u));
++ }
++#endif
++
++ return rc;
++}
++
++static inline int __must_check
++HYPERVISOR_xen_version(
++ int cmd, void *arg)
++{
++ return _hypercall2(int, xen_version, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_console_io(
++ int cmd, unsigned int count, char *str)
++{
++ return _hypercall3(int, console_io, cmd, count, str);
++}
++
++static inline int __must_check
++HYPERVISOR_physdev_op(
++ int cmd, void *arg)
++{
++ int rc = _hypercall2(int, physdev_op, cmd, arg);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ struct physdev_op op;
++ op.cmd = cmd;
++ memcpy(&op.u, arg, sizeof(op.u));
++ rc = _hypercall1(int, physdev_op_compat, &op);
++ memcpy(arg, &op.u, sizeof(op.u));
++ }
++#endif
++
++ return rc;
++}
++
++static inline int __must_check
++HYPERVISOR_grant_table_op(
++ unsigned int cmd, void *uop, unsigned int count)
++{
++ return _hypercall3(int, grant_table_op, cmd, uop, count);
++}
++
++static inline int __must_check
++HYPERVISOR_update_va_mapping_otherdomain(
++ unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
++{
++ unsigned long pte_hi = 0;
++#ifdef CONFIG_X86_PAE
++ pte_hi = new_val.pte_high;
++#endif
++ return _hypercall5(int, update_va_mapping_otherdomain, va,
++ new_val.pte_low, pte_hi, flags, domid);
++}
++
++static inline int __must_check
++HYPERVISOR_vm_assist(
++ unsigned int cmd, unsigned int type)
++{
++ return _hypercall2(int, vm_assist, cmd, type);
++}
++
++static inline int __must_check
++HYPERVISOR_vcpu_op(
++ int cmd, unsigned int vcpuid, void *extra_args)
++{
++ return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
++}
++
++static inline int __must_check
++HYPERVISOR_suspend(
++ unsigned long srec)
++{
++ struct sched_shutdown sched_shutdown = {
++ .reason = SHUTDOWN_suspend
++ };
++
++ int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
++ &sched_shutdown, srec);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (rc == -ENOSYS)
++ rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
++ SHUTDOWN_suspend, srec);
++#endif
++
++ return rc;
++}
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++static inline int
++HYPERVISOR_nmi_op(
++ unsigned long op, void *arg)
++{
++ return _hypercall2(int, nmi_op, op, arg);
++}
++#endif
++
++#ifndef CONFIG_XEN
++static inline unsigned long __must_check
++HYPERVISOR_hvm_op(
++ int op, void *arg)
++{
++ return _hypercall2(unsigned long, hvm_op, op, arg);
++}
++#endif
++
++static inline int __must_check
++HYPERVISOR_callback_op(
++ int cmd, const void *arg)
++{
++ return _hypercall2(int, callback_op, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_xenoprof_op(
++ int op, void *arg)
++{
++ return _hypercall2(int, xenoprof_op, op, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_kexec_op(
++ unsigned long op, void *args)
++{
++ return _hypercall2(int, kexec_op, op, args);
++}
++
++
++
++#endif /* __HYPERCALL_H__ */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/hypervisor.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,259 @@
++/******************************************************************************
++ * hypervisor.h
++ *
++ * Linux-specific hypervisor handling.
++ *
++ * Copyright (c) 2002-2004, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __HYPERVISOR_H__
++#define __HYPERVISOR_H__
++
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/version.h>
++#include <linux/errno.h>
++#include <xen/interface/xen.h>
++#include <xen/interface/platform.h>
++#include <xen/interface/event_channel.h>
++#include <xen/interface/physdev.h>
++#include <xen/interface/sched.h>
++#include <xen/interface/nmi.h>
++#include <asm/ptrace.h>
++#include <asm/page.h>
++#if defined(__i386__)
++# ifdef CONFIG_X86_PAE
++# include <asm-generic/pgtable-nopud.h>
++# else
++# include <asm-generic/pgtable-nopmd.h>
++# endif
++#elif defined(__x86_64__) && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
++# include <asm-generic/pgtable-nopud.h>
++#endif
++
++extern shared_info_t *HYPERVISOR_shared_info;
++
++#define vcpu_info(cpu) (HYPERVISOR_shared_info->vcpu_info + (cpu))
++#ifdef CONFIG_SMP
++#define current_vcpu_info() vcpu_info(smp_processor_id())
++#else
++#define current_vcpu_info() vcpu_info(0)
++#endif
++
++#ifdef CONFIG_X86_32
++extern unsigned long hypervisor_virt_start;
++#endif
++
++/* arch/xen/i386/kernel/setup.c */
++extern start_info_t *xen_start_info;
++#ifdef CONFIG_XEN_PRIVILEGED_GUEST
++#define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
++#else
++#define is_initial_xendomain() 0
++#endif
++
++/* arch/xen/kernel/evtchn.c */
++/* Force a proper event-channel callback from Xen. */
++void force_evtchn_callback(void);
++
++/* arch/xen/kernel/process.c */
++void xen_cpu_idle (void);
++
++/* arch/xen/i386/kernel/hypervisor.c */
++void do_hypervisor_callback(struct pt_regs *regs);
++
++/* arch/xen/i386/mm/hypervisor.c */
++/*
++ * NB. ptr values should be PHYSICAL, not MACHINE. 'vals' should be already
++ * be MACHINE addresses.
++ */
++
++void xen_pt_switch(unsigned long ptr);
++void xen_new_user_pt(unsigned long ptr); /* x86_64 only */
++void xen_load_gs(unsigned int selector); /* x86_64 only */
++void xen_tlb_flush(void);
++void xen_invlpg(unsigned long ptr);
++
++void xen_l1_entry_update(pte_t *ptr, pte_t val);
++void xen_l2_entry_update(pmd_t *ptr, pmd_t val);
++void xen_l3_entry_update(pud_t *ptr, pud_t val); /* x86_64/PAE */
++void xen_l4_entry_update(pgd_t *ptr, pgd_t val); /* x86_64 only */
++void xen_pgd_pin(unsigned long ptr);
++void xen_pgd_unpin(unsigned long ptr);
++
++void xen_set_ldt(const void *ptr, unsigned int ents);
++
++#ifdef CONFIG_SMP
++#include <linux/cpumask.h>
++void xen_tlb_flush_all(void);
++void xen_invlpg_all(unsigned long ptr);
++void xen_tlb_flush_mask(cpumask_t *mask);
++void xen_invlpg_mask(cpumask_t *mask, unsigned long ptr);
++#endif
++
++/* Returns zero on success else negative errno. */
++int xen_create_contiguous_region(
++ unsigned long vstart, unsigned int order, unsigned int address_bits);
++void xen_destroy_contiguous_region(
++ unsigned long vstart, unsigned int order);
++
++struct page;
++
++int xen_limit_pages_to_max_mfn(
++ struct page *pages, unsigned int order, unsigned int address_bits);
++
++/* Turn jiffies into Xen system time. */
++u64 jiffies_to_st(unsigned long jiffies);
++
++#ifdef CONFIG_XEN_SCRUB_PAGES
++void scrub_pages(void *, unsigned int);
++#else
++#define scrub_pages(_p,_n) ((void)0)
++#endif
++
++#include <xen/hypercall.h>
++
++#if defined(CONFIG_X86_64)
++#define MULTI_UVMFLAGS_INDEX 2
++#define MULTI_UVMDOMID_INDEX 3
++#else
++#define MULTI_UVMFLAGS_INDEX 3
++#define MULTI_UVMDOMID_INDEX 4
++#endif
++
++#ifdef CONFIG_XEN
++#define is_running_on_xen() 1
++#else
++extern char *hypercall_stubs;
++#define is_running_on_xen() (!!hypercall_stubs)
++#endif
++
++static inline int
++HYPERVISOR_yield(
++ void)
++{
++ int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (rc == -ENOSYS)
++ rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
++#endif
++
++ return rc;
++}
++
++static inline int
++HYPERVISOR_block(
++ void)
++{
++ int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (rc == -ENOSYS)
++ rc = HYPERVISOR_sched_op_compat(SCHEDOP_block, 0);
++#endif
++
++ return rc;
++}
++
++static inline void /*__noreturn*/
++HYPERVISOR_shutdown(
++ unsigned int reason)
++{
++ struct sched_shutdown sched_shutdown = {
++ .reason = reason
++ };
++
++ VOID(HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown));
++#if CONFIG_XEN_COMPAT <= 0x030002
++ VOID(HYPERVISOR_sched_op_compat(SCHEDOP_shutdown, reason));
++#endif
++ /* Don't recurse needlessly. */
++ BUG_ON(reason != SHUTDOWN_crash);
++ for(;;);
++}
++
++static inline int __must_check
++HYPERVISOR_poll(
++ evtchn_port_t *ports, unsigned int nr_ports, u64 timeout)
++{
++ int rc;
++ struct sched_poll sched_poll = {
++ .nr_ports = nr_ports,
++ .timeout = jiffies_to_st(timeout)
++ };
++ set_xen_guest_handle(sched_poll.ports, ports);
++
++ rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (rc == -ENOSYS)
++ rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
++#endif
++
++ return rc;
++}
++
++#ifdef CONFIG_XEN
++
++static inline void
++MULTI_update_va_mapping(
++ multicall_entry_t *mcl, unsigned long va,
++ pte_t new_val, unsigned long flags)
++{
++ mcl->op = __HYPERVISOR_update_va_mapping;
++ mcl->args[0] = va;
++#if defined(CONFIG_X86_64)
++ mcl->args[1] = new_val.pte;
++#elif defined(CONFIG_X86_PAE)
++ mcl->args[1] = new_val.pte_low;
++ mcl->args[2] = new_val.pte_high;
++#else
++ mcl->args[1] = new_val.pte_low;
++ mcl->args[2] = 0;
++#endif
++ mcl->args[MULTI_UVMFLAGS_INDEX] = flags;
++}
++
++static inline void
++MULTI_grant_table_op(multicall_entry_t *mcl, unsigned int cmd,
++ void *uop, unsigned int count)
++{
++ mcl->op = __HYPERVISOR_grant_table_op;
++ mcl->args[0] = cmd;
++ mcl->args[1] = (unsigned long)uop;
++ mcl->args[2] = count;
++}
++
++#else /* !defined(CONFIG_XEN) */
++
++/* Multicalls not supported for HVM guests. */
++#define MULTI_update_va_mapping(a,b,c,d) ((void)0)
++#define MULTI_grant_table_op(a,b,c,d) ((void)0)
++
++#endif
++
++#endif /* __HYPERVISOR_H__ */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/io_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/io_32.h 2007-08-16 18:07:01.000000000 +0200
+@@ -0,0 +1,389 @@
++#ifndef _ASM_IO_H
++#define _ASM_IO_H
++
++#include <linux/string.h>
++#include <linux/compiler.h>
++
++/*
++ * This file contains the definitions for the x86 IO instructions
++ * inb/inw/inl/outb/outw/outl and the "string versions" of the same
++ * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
++ * versions of the single-IO instructions (inb_p/inw_p/..).
++ *
++ * This file is not meant to be obfuscating: it's just complicated
++ * to (a) handle it all in a way that makes gcc able to optimize it
++ * as well as possible and (b) trying to avoid writing the same thing
++ * over and over again with slight variations and possibly making a
++ * mistake somewhere.
++ */
++
++/*
++ * Thanks to James van Artsdalen for a better timing-fix than
++ * the two short jumps: using outb's to a nonexistent port seems
++ * to guarantee better timings even on fast machines.
++ *
++ * On the other hand, I'd like to be sure of a non-existent port:
++ * I feel a bit unsafe about using 0x80 (should be safe, though)
++ *
++ * Linus
++ */
++
++ /*
++ * Bit simplified and optimized by Jan Hubicka
++ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
++ *
++ * isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
++ * isa_read[wl] and isa_write[wl] fixed
++ * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
++ */
++
++#define IO_SPACE_LIMIT 0xffff
++
++#define XQUAD_PORTIO_BASE 0xfe400000
++#define XQUAD_PORTIO_QUAD 0x40000 /* 256k per quad. */
++
++#ifdef __KERNEL__
++
++#include <asm-generic/iomap.h>
++
++#include <linux/vmalloc.h>
++#include <asm/fixmap.h>
++
++/*
++ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
++ * access
++ */
++#define xlate_dev_mem_ptr(p) __va(p)
++
++/*
++ * Convert a virtual cached pointer to an uncached pointer
++ */
++#define xlate_dev_kmem_ptr(p) p
++
++/**
++ * virt_to_phys - map virtual addresses to physical
++ * @address: address to remap
++ *
++ * The returned physical address is the physical (CPU) mapping for
++ * the memory address given. It is only valid to use this function on
++ * addresses directly mapped or allocated via kmalloc.
++ *
++ * This function does not give bus mappings for DMA transfers. In
++ * almost all conceivable cases a device driver should not be using
++ * this function
++ */
++
++static inline unsigned long virt_to_phys(volatile void * address)
++{
++ return __pa(address);
++}
++
++/**
++ * phys_to_virt - map physical address to virtual
++ * @address: address to remap
++ *
++ * The returned virtual address is a current CPU mapping for
++ * the memory address given. It is only valid to use this function on
++ * addresses that have a kernel mapping
++ *
++ * This function does not handle bus mappings for DMA transfers. In
++ * almost all conceivable cases a device driver should not be using
++ * this function
++ */
++
++static inline void * phys_to_virt(unsigned long address)
++{
++ return __va(address);
++}
++
++/*
++ * Change "struct page" to physical address.
++ */
++#define page_to_pseudophys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
++#define page_to_phys(page) (phys_to_machine(page_to_pseudophys(page)))
++#define page_to_bus(page) (phys_to_machine(page_to_pseudophys(page)))
++
++#define bio_to_pseudophys(bio) (page_to_pseudophys(bio_page((bio))) + \
++ (unsigned long) bio_offset((bio)))
++#define bvec_to_pseudophys(bv) (page_to_pseudophys((bv)->bv_page) + \
++ (unsigned long) (bv)->bv_offset)
++
++#define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
++ (((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) && \
++ ((bvec_to_pseudophys((vec1)) + (vec1)->bv_len) == \
++ bvec_to_pseudophys((vec2))))
++
++extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
++
++/**
++ * ioremap - map bus memory into CPU space
++ * @offset: bus address of the memory
++ * @size: size of the resource to map
++ *
++ * ioremap performs a platform specific sequence of operations to
++ * make bus memory CPU accessible via the readb/readw/readl/writeb/
++ * writew/writel functions and the other mmio helpers. The returned
++ * address is not guaranteed to be usable directly as a virtual
++ * address.
++ */
++
++static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
++{
++ return __ioremap(offset, size, 0);
++}
++
++extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
++extern void iounmap(volatile void __iomem *addr);
++
++/*
++ * bt_ioremap() and bt_iounmap() are for temporary early boot-time
++ * mappings, before the real ioremap() is functional.
++ * A boot-time mapping is currently limited to at most 16 pages.
++ */
++extern void *bt_ioremap(unsigned long offset, unsigned long size);
++extern void bt_iounmap(void *addr, unsigned long size);
++
++/* Use early IO mappings for DMI because it's initialized early */
++#define dmi_ioremap bt_ioremap
++#define dmi_iounmap bt_iounmap
++#define dmi_alloc alloc_bootmem
++
++/*
++ * ISA I/O bus memory addresses are 1:1 with the physical address.
++ */
++#define isa_virt_to_bus(_x) ({ BUG(); virt_to_bus(_x); })
++#define isa_page_to_bus(_x) isa_page_to_bus_is_UNSUPPORTED->x
++#define isa_bus_to_virt(_x) (void *)(__fix_to_virt(FIX_ISAMAP_BEGIN) + (_x))
++
++/*
++ * However PCI ones are not necessarily 1:1 and therefore these interfaces
++ * are forbidden in portable PCI drivers.
++ *
++ * Allow them on x86 for legacy drivers, though.
++ */
++#define virt_to_bus(_x) phys_to_machine(__pa(_x))
++#define bus_to_virt(_x) __va(machine_to_phys(_x))
++
++/*
++ * readX/writeX() are used to access memory mapped devices. On some
++ * architectures the memory mapped IO stuff needs to be accessed
++ * differently. On the x86 architecture, we just read/write the
++ * memory location directly.
++ */
++
++static inline unsigned char readb(const volatile void __iomem *addr)
++{
++ return *(volatile unsigned char __force *) addr;
++}
++static inline unsigned short readw(const volatile void __iomem *addr)
++{
++ return *(volatile unsigned short __force *) addr;
++}
++static inline unsigned int readl(const volatile void __iomem *addr)
++{
++ return *(volatile unsigned int __force *) addr;
++}
++#define readb_relaxed(addr) readb(addr)
++#define readw_relaxed(addr) readw(addr)
++#define readl_relaxed(addr) readl(addr)
++#define __raw_readb readb
++#define __raw_readw readw
++#define __raw_readl readl
++
++static inline void writeb(unsigned char b, volatile void __iomem *addr)
++{
++ *(volatile unsigned char __force *) addr = b;
++}
++static inline void writew(unsigned short b, volatile void __iomem *addr)
++{
++ *(volatile unsigned short __force *) addr = b;
++}
++static inline void writel(unsigned int b, volatile void __iomem *addr)
++{
++ *(volatile unsigned int __force *) addr = b;
++}
++#define __raw_writeb writeb
++#define __raw_writew writew
++#define __raw_writel writel
++
++#define mmiowb()
++
++static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
++{
++ memset((void __force *) addr, val, count);
++}
++static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
++{
++ __memcpy(dst, (void __force *) src, count);
++}
++static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
++{
++ __memcpy((void __force *) dst, src, count);
++}
++
++/*
++ * ISA space is 'always mapped' on a typical x86 system, no need to
++ * explicitly ioremap() it. The fact that the ISA IO space is mapped
++ * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
++ * are physical addresses. The following constant pointer can be
++ * used as the IO-area pointer (it can be iounmapped as well, so the
++ * analogy with PCI is quite large):
++ */
++#define __ISA_IO_base ((char __iomem *)(fix_to_virt(FIX_ISAMAP_BEGIN)))
++
++/*
++ * Again, i386 does not require mem IO specific function.
++ */
++
++#define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void __force *)(b),(c),(d))
++
++/**
++ * check_signature - find BIOS signatures
++ * @io_addr: mmio address to check
++ * @signature: signature block
++ * @length: length of signature
++ *
++ * Perform a signature comparison with the mmio address io_addr. This
++ * address should have been obtained by ioremap.
++ * Returns 1 on a match.
++ */
++
++static inline int check_signature(volatile void __iomem * io_addr,
++ const unsigned char *signature, int length)
++{
++ int retval = 0;
++ do {
++ if (readb(io_addr) != *signature)
++ goto out;
++ io_addr++;
++ signature++;
++ length--;
++ } while (length);
++ retval = 1;
++out:
++ return retval;
++}
++
++/*
++ * Cache management
++ *
++ * This needed for two cases
++ * 1. Out of order aware processors
++ * 2. Accidentally out of order processors (PPro errata #51)
++ */
++
++#if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
++
++static inline void flush_write_buffers(void)
++{
++ __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory");
++}
++
++#define dma_cache_inv(_start,_size) flush_write_buffers()
++#define dma_cache_wback(_start,_size) flush_write_buffers()
++#define dma_cache_wback_inv(_start,_size) flush_write_buffers()
++
++#else
++
++/* Nothing to do */
++
++#define dma_cache_inv(_start,_size) do { } while (0)
++#define dma_cache_wback(_start,_size) do { } while (0)
++#define dma_cache_wback_inv(_start,_size) do { } while (0)
++#define flush_write_buffers()
++
++#endif
++
++#endif /* __KERNEL__ */
++
++#ifdef SLOW_IO_BY_JUMPING
++#define __SLOW_DOWN_IO "jmp 1f; 1: jmp 1f; 1:"
++#else
++#define __SLOW_DOWN_IO "outb %%al,$0x80;"
++#endif
++
++static inline void slow_down_io(void) {
++ __asm__ __volatile__(
++ __SLOW_DOWN_IO
++#ifdef REALLY_SLOW_IO
++ __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
++#endif
++ : : );
++}
++
++#ifdef CONFIG_X86_NUMAQ
++extern void *xquad_portio; /* Where the IO area was mapped */
++#define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
++#define __BUILDIO(bwl,bw,type) \
++static inline void out##bwl##_quad(unsigned type value, int port, int quad) { \
++ if (xquad_portio) \
++ write##bwl(value, XQUAD_PORT_ADDR(port, quad)); \
++ else \
++ out##bwl##_local(value, port); \
++} \
++static inline void out##bwl(unsigned type value, int port) { \
++ out##bwl##_quad(value, port, 0); \
++} \
++static inline unsigned type in##bwl##_quad(int port, int quad) { \
++ if (xquad_portio) \
++ return read##bwl(XQUAD_PORT_ADDR(port, quad)); \
++ else \
++ return in##bwl##_local(port); \
++} \
++static inline unsigned type in##bwl(int port) { \
++ return in##bwl##_quad(port, 0); \
++}
++#else
++#define __BUILDIO(bwl,bw,type) \
++static inline void out##bwl(unsigned type value, int port) { \
++ out##bwl##_local(value, port); \
++} \
++static inline unsigned type in##bwl(int port) { \
++ return in##bwl##_local(port); \
++}
++#endif
++
++
++#define BUILDIO(bwl,bw,type) \
++static inline void out##bwl##_local(unsigned type value, int port) { \
++ __asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)); \
++} \
++static inline unsigned type in##bwl##_local(int port) { \
++ unsigned type value; \
++ __asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)); \
++ return value; \
++} \
++static inline void out##bwl##_local_p(unsigned type value, int port) { \
++ out##bwl##_local(value, port); \
++ slow_down_io(); \
++} \
++static inline unsigned type in##bwl##_local_p(int port) { \
++ unsigned type value = in##bwl##_local(port); \
++ slow_down_io(); \
++ return value; \
++} \
++__BUILDIO(bwl,bw,type) \
++static inline void out##bwl##_p(unsigned type value, int port) { \
++ out##bwl(value, port); \
++ slow_down_io(); \
++} \
++static inline unsigned type in##bwl##_p(int port) { \
++ unsigned type value = in##bwl(port); \
++ slow_down_io(); \
++ return value; \
++} \
++static inline void outs##bwl(int port, const void *addr, unsigned long count) { \
++ __asm__ __volatile__("rep; outs" #bwl : "+S"(addr), "+c"(count) : "d"(port)); \
++} \
++static inline void ins##bwl(int port, void *addr, unsigned long count) { \
++ __asm__ __volatile__("rep; ins" #bwl : "+D"(addr), "+c"(count) : "d"(port)); \
++}
++
++BUILDIO(b,b,char)
++BUILDIO(w,w,short)
++BUILDIO(l,,int)
++
++/* We will be supplying our own /dev/mem implementation */
++#define ARCH_HAS_DEV_MEM
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/irqflags_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/irqflags_32.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,127 @@
++/*
++ * include/asm-i386/irqflags.h
++ *
++ * IRQ flags handling
++ *
++ * This file gets included from lowlevel asm headers too, to provide
++ * wrapped versions of the local_irq_*() APIs, based on the
++ * raw_local_irq_*() functions from the lowlevel headers.
++ */
++#ifndef _ASM_IRQFLAGS_H
++#define _ASM_IRQFLAGS_H
++
++#ifndef __ASSEMBLY__
++
++/*
++ * The use of 'barrier' in the following reflects their use as local-lock
++ * operations. Reentrancy must be prevented (e.g., __cli()) /before/ following
++ * critical operations are executed. All critical operations must complete
++ * /before/ reentrancy is permitted (e.g., __sti()). Alpha architecture also
++ * includes these barriers, for example.
++ */
++
++#define __raw_local_save_flags() (current_vcpu_info()->evtchn_upcall_mask)
++
++#define raw_local_save_flags(flags) \
++ do { (flags) = __raw_local_save_flags(); } while (0)
++
++#define raw_local_irq_restore(x) \
++do { \
++ vcpu_info_t *_vcpu; \
++ barrier(); \
++ _vcpu = current_vcpu_info(); \
++ if ((_vcpu->evtchn_upcall_mask = (x)) == 0) { \
++ barrier(); /* unmask then check (avoid races) */ \
++ if (unlikely(_vcpu->evtchn_upcall_pending)) \
++ force_evtchn_callback(); \
++ } \
++} while (0)
++
++#define raw_local_irq_disable() \
++do { \
++ current_vcpu_info()->evtchn_upcall_mask = 1; \
++ barrier(); \
++} while (0)
++
++#define raw_local_irq_enable() \
++do { \
++ vcpu_info_t *_vcpu; \
++ barrier(); \
++ _vcpu = current_vcpu_info(); \
++ _vcpu->evtchn_upcall_mask = 0; \
++ barrier(); /* unmask then check (avoid races) */ \
++ if (unlikely(_vcpu->evtchn_upcall_pending)) \
++ force_evtchn_callback(); \
++} while (0)
++
++/*
++ * Used in the idle loop; sti takes one instruction cycle
++ * to complete:
++ */
++void raw_safe_halt(void);
++
++/*
++ * Used when interrupts are already enabled or to
++ * shutdown the processor:
++ */
++void halt(void);
++
++static inline int raw_irqs_disabled_flags(unsigned long flags)
++{
++ return (flags != 0);
++}
++
++#define raw_irqs_disabled() \
++({ \
++ unsigned long flags = __raw_local_save_flags(); \
++ \
++ raw_irqs_disabled_flags(flags); \
++})
++
++/*
++ * For spinlocks, etc:
++ */
++#define __raw_local_irq_save() \
++({ \
++ unsigned long flags = __raw_local_save_flags(); \
++ \
++ raw_local_irq_disable(); \
++ \
++ flags; \
++})
++
++#define raw_local_irq_save(flags) \
++ do { (flags) = __raw_local_irq_save(); } while (0)
++
++#endif /* __ASSEMBLY__ */
++
++/*
++ * Do the CPU's IRQ-state tracing from assembly code. We call a
++ * C function, so save all the C-clobbered registers:
++ */
++#ifdef CONFIG_TRACE_IRQFLAGS
++
++# define TRACE_IRQS_ON \
++ pushl %eax; \
++ pushl %ecx; \
++ pushl %edx; \
++ call trace_hardirqs_on; \
++ popl %edx; \
++ popl %ecx; \
++ popl %eax;
++
++# define TRACE_IRQS_OFF \
++ pushl %eax; \
++ pushl %ecx; \
++ pushl %edx; \
++ call trace_hardirqs_off; \
++ popl %edx; \
++ popl %ecx; \
++ popl %eax;
++
++#else
++# define TRACE_IRQS_ON
++# define TRACE_IRQS_OFF
++#endif
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/maddr_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/maddr_32.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,193 @@
++#ifndef _I386_MADDR_H
++#define _I386_MADDR_H
++
++#include <xen/features.h>
++#include <xen/interface/xen.h>
++
++/**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/
++#define INVALID_P2M_ENTRY (~0UL)
++#define FOREIGN_FRAME_BIT (1UL<<31)
++#define FOREIGN_FRAME(m) ((m) | FOREIGN_FRAME_BIT)
++
++/* Definitions for machine and pseudophysical addresses. */
++#ifdef CONFIG_X86_PAE
++typedef unsigned long long paddr_t;
++typedef unsigned long long maddr_t;
++#else
++typedef unsigned long paddr_t;
++typedef unsigned long maddr_t;
++#endif
++
++#ifdef CONFIG_XEN
++
++extern unsigned long *phys_to_machine_mapping;
++extern unsigned long max_mapnr;
++
++#undef machine_to_phys_mapping
++extern unsigned long *machine_to_phys_mapping;
++extern unsigned int machine_to_phys_order;
++
++static inline unsigned long pfn_to_mfn(unsigned long pfn)
++{
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return pfn;
++ BUG_ON(max_mapnr && pfn >= max_mapnr);
++ return phys_to_machine_mapping[pfn] & ~FOREIGN_FRAME_BIT;
++}
++
++static inline int phys_to_machine_mapping_valid(unsigned long pfn)
++{
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return 1;
++ BUG_ON(max_mapnr && pfn >= max_mapnr);
++ return (phys_to_machine_mapping[pfn] != INVALID_P2M_ENTRY);
++}
++
++static inline unsigned long mfn_to_pfn(unsigned long mfn)
++{
++ unsigned long pfn;
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return mfn;
++
++ if (unlikely((mfn >> machine_to_phys_order) != 0))
++ return max_mapnr;
++
++ /* The array access can fail (e.g., device space beyond end of RAM). */
++ asm (
++ "1: movl %1,%0\n"
++ "2:\n"
++ ".section .fixup,\"ax\"\n"
++ "3: movl %2,%0\n"
++ " jmp 2b\n"
++ ".previous\n"
++ ".section __ex_table,\"a\"\n"
++ " .align 4\n"
++ " .long 1b,3b\n"
++ ".previous"
++ : "=r" (pfn)
++ : "m" (machine_to_phys_mapping[mfn]), "m" (max_mapnr) );
++
++ return pfn;
++}
++
++/*
++ * We detect special mappings in one of two ways:
++ * 1. If the MFN is an I/O page then Xen will set the m2p entry
++ * to be outside our maximum possible pseudophys range.
++ * 2. If the MFN belongs to a different domain then we will certainly
++ * not have MFN in our p2m table. Conversely, if the page is ours,
++ * then we'll have p2m(m2p(MFN))==MFN.
++ * If we detect a special mapping then it doesn't have a 'struct page'.
++ * We force !pfn_valid() by returning an out-of-range pointer.
++ *
++ * NB. These checks require that, for any MFN that is not in our reservation,
++ * there is no PFN such that p2m(PFN) == MFN. Otherwise we can get confused if
++ * we are foreign-mapping the MFN, and the other domain as m2p(MFN) == PFN.
++ * Yikes! Various places must poke in INVALID_P2M_ENTRY for safety.
++ *
++ * NB2. When deliberately mapping foreign pages into the p2m table, you *must*
++ * use FOREIGN_FRAME(). This will cause pte_pfn() to choke on it, as we
++ * require. In all the cases we care about, the FOREIGN_FRAME bit is
++ * masked (e.g., pfn_to_mfn()) so behaviour there is correct.
++ */
++static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
++{
++ unsigned long pfn = mfn_to_pfn(mfn);
++ if ((pfn < max_mapnr)
++ && !xen_feature(XENFEAT_auto_translated_physmap)
++ && (phys_to_machine_mapping[pfn] != mfn))
++ return max_mapnr; /* force !pfn_valid() */
++ return pfn;
++}
++
++static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
++{
++ BUG_ON(max_mapnr && pfn >= max_mapnr);
++ if (xen_feature(XENFEAT_auto_translated_physmap)) {
++ BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY);
++ return;
++ }
++ phys_to_machine_mapping[pfn] = mfn;
++}
++
++static inline maddr_t phys_to_machine(paddr_t phys)
++{
++ maddr_t machine = pfn_to_mfn(phys >> PAGE_SHIFT);
++ machine = (machine << PAGE_SHIFT) | (phys & ~PAGE_MASK);
++ return machine;
++}
++
++static inline paddr_t machine_to_phys(maddr_t machine)
++{
++ paddr_t phys = mfn_to_pfn(machine >> PAGE_SHIFT);
++ phys = (phys << PAGE_SHIFT) | (machine & ~PAGE_MASK);
++ return phys;
++}
++
++#ifdef CONFIG_X86_PAE
++static inline paddr_t pte_phys_to_machine(paddr_t phys)
++{
++ /*
++ * In PAE mode, the NX bit needs to be dealt with in the value
++ * passed to pfn_to_mfn(). On x86_64, we need to mask it off,
++ * but for i386 the conversion to ulong for the argument will
++ * clip it off.
++ */
++ maddr_t machine = pfn_to_mfn(phys >> PAGE_SHIFT);
++ machine = (machine << PAGE_SHIFT) | (phys & ~PHYSICAL_PAGE_MASK);
++ return machine;
++}
++
++static inline paddr_t pte_machine_to_phys(maddr_t machine)
++{
++ /*
++ * In PAE mode, the NX bit needs to be dealt with in the value
++ * passed to mfn_to_pfn(). On x86_64, we need to mask it off,
++ * but for i386 the conversion to ulong for the argument will
++ * clip it off.
++ */
++ paddr_t phys = mfn_to_pfn(machine >> PAGE_SHIFT);
++ phys = (phys << PAGE_SHIFT) | (machine & ~PHYSICAL_PAGE_MASK);
++ return phys;
++}
++#endif
++
++#ifdef CONFIG_X86_PAE
++#define __pte_ma(x) ((pte_t) { (x), (maddr_t)(x) >> 32 } )
++static inline pte_t pfn_pte_ma(unsigned long page_nr, pgprot_t pgprot)
++{
++ pte_t pte;
++
++ pte.pte_high = (page_nr >> (32 - PAGE_SHIFT)) | \
++ (pgprot_val(pgprot) >> 32);
++ pte.pte_high &= (__supported_pte_mask >> 32);
++ pte.pte_low = ((page_nr << PAGE_SHIFT) | pgprot_val(pgprot)) & \
++ __supported_pte_mask;
++ return pte;
++}
++#else
++#define __pte_ma(x) ((pte_t) { (x) } )
++#define pfn_pte_ma(pfn, prot) __pte_ma(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
++#endif
++
++#else /* !CONFIG_XEN */
++
++#define pfn_to_mfn(pfn) (pfn)
++#define mfn_to_pfn(mfn) (mfn)
++#define mfn_to_local_pfn(mfn) (mfn)
++#define set_phys_to_machine(pfn, mfn) ((void)0)
++#define phys_to_machine_mapping_valid(pfn) (1)
++#define phys_to_machine(phys) ((maddr_t)(phys))
++#define machine_to_phys(mach) ((paddr_t)(mach))
++#define pfn_pte_ma(pfn, prot) pfn_pte(pfn, prot)
++#define __pte_ma(x) __pte(x)
++
++#endif /* !CONFIG_XEN */
++
++/* VIRT <-> MACHINE conversion */
++#define virt_to_machine(v) (phys_to_machine(__pa(v)))
++#define virt_to_mfn(v) (pfn_to_mfn(__pa(v) >> PAGE_SHIFT))
++#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
++
++#endif /* _I386_MADDR_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/mmu_context_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/mmu_context_32.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,108 @@
++#ifndef __I386_SCHED_H
++#define __I386_SCHED_H
++
++#include <asm/desc.h>
++#include <asm/atomic.h>
++#include <asm/pgalloc.h>
++#include <asm/tlbflush.h>
++
++/*
++ * Used for LDT copy/destruction.
++ */
++int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
++void destroy_context(struct mm_struct *mm);
++
++
++static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
++{
++#if 0 /* XEN: no lazy tlb */
++ unsigned cpu = smp_processor_id();
++ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
++ per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_LAZY;
++#endif
++}
++
++#define prepare_arch_switch(next) __prepare_arch_switch()
++
++static inline void __prepare_arch_switch(void)
++{
++ /*
++ * Save away %fs and %gs. No need to save %es and %ds, as those
++ * are always kernel segments while inside the kernel. Must
++ * happen before reload of cr3/ldt (i.e., not in __switch_to).
++ */
++ asm volatile ( "mov %%fs,%0 ; mov %%gs,%1"
++ : "=m" (current->thread.fs),
++ "=m" (current->thread.gs));
++ asm volatile ( "movl %0,%%fs ; movl %0,%%gs"
++ : : "r" (0) );
++}
++
++extern void mm_pin(struct mm_struct *mm);
++extern void mm_unpin(struct mm_struct *mm);
++void mm_pin_all(void);
++
++static inline void switch_mm(struct mm_struct *prev,
++ struct mm_struct *next,
++ struct task_struct *tsk)
++{
++ int cpu = smp_processor_id();
++ struct mmuext_op _op[2], *op = _op;
++
++ if (likely(prev != next)) {
++ BUG_ON(!xen_feature(XENFEAT_writable_page_tables) &&
++ !test_bit(PG_pinned, &virt_to_page(next->pgd)->flags));
++
++ /* stop flush ipis for the previous mm */
++ cpu_clear(cpu, prev->cpu_vm_mask);
++#if 0 /* XEN: no lazy tlb */
++ per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_OK;
++ per_cpu(cpu_tlbstate, cpu).active_mm = next;
++#endif
++ cpu_set(cpu, next->cpu_vm_mask);
++
++ /* Re-load page tables: load_cr3(next->pgd) */
++ op->cmd = MMUEXT_NEW_BASEPTR;
++ op->arg1.mfn = pfn_to_mfn(__pa(next->pgd) >> PAGE_SHIFT);
++ op++;
++
++ /*
++ * load the LDT, if the LDT is different:
++ */
++ if (unlikely(prev->context.ldt != next->context.ldt)) {
++ /* load_LDT_nolock(&next->context, cpu) */
++ op->cmd = MMUEXT_SET_LDT;
++ op->arg1.linear_addr = (unsigned long)next->context.ldt;
++ op->arg2.nr_ents = next->context.size;
++ op++;
++ }
++
++ BUG_ON(HYPERVISOR_mmuext_op(_op, op-_op, NULL, DOMID_SELF));
++ }
++#if 0 /* XEN: no lazy tlb */
++ else {
++ per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_OK;
++ BUG_ON(per_cpu(cpu_tlbstate, cpu).active_mm != next);
++
++ if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
++ /* We were in lazy tlb mode and leave_mm disabled
++ * tlb flush IPI delivery. We must reload %cr3.
++ */
++ load_cr3(next->pgd);
++ load_LDT_nolock(&next->context, cpu);
++ }
++ }
++#endif
++}
++
++#define deactivate_mm(tsk, mm) \
++ asm("movl %0,%%fs ; movl %0,%%gs": :"r" (0))
++
++static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
++{
++ if (!test_bit(PG_pinned, &virt_to_page(next->pgd)->flags))
++ mm_pin(next);
++ switch_mm(prev, next, NULL);
++}
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pci_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pci_32.h 2007-09-14 11:14:51.000000000 +0200
+@@ -0,0 +1,148 @@
++#ifndef __i386_PCI_H
++#define __i386_PCI_H
++
++
++#ifdef __KERNEL__
++#include <linux/mm.h> /* for struct page */
++
++/* Can be used to override the logic in pci_scan_bus for skipping
++ already-configured bus numbers - to be used for buggy BIOSes
++ or architectures with incomplete PCI setup by the loader */
++
++#ifdef CONFIG_PCI
++extern unsigned int pcibios_assign_all_busses(void);
++#else
++#define pcibios_assign_all_busses() 0
++#endif
++
++#include <asm/hypervisor.h>
++#define pcibios_scan_all_fns(a, b) (!is_initial_xendomain())
++
++extern unsigned long pci_mem_start;
++#define PCIBIOS_MIN_IO 0x1000
++#define PCIBIOS_MIN_MEM (pci_mem_start)
++
++#define PCIBIOS_MIN_CARDBUS_IO 0x4000
++
++void pcibios_config_init(void);
++struct pci_bus * pcibios_scan_root(int bus);
++
++void pcibios_set_master(struct pci_dev *dev);
++void pcibios_penalize_isa_irq(int irq, int active);
++struct irq_routing_table *pcibios_get_irq_routing_table(void);
++int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
++
++/* Dynamic DMA mapping stuff.
++ * i386 has everything mapped statically.
++ */
++
++#include <linux/types.h>
++#include <linux/slab.h>
++#include <asm/scatterlist.h>
++#include <linux/string.h>
++#include <asm/io.h>
++
++struct pci_dev;
++
++#ifdef CONFIG_SWIOTLB
++
++
++/* On Xen we use SWIOTLB instead of blk-specific bounce buffers. */
++#define PCI_DMA_BUS_IS_PHYS (0)
++
++#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
++ dma_addr_t ADDR_NAME;
++#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
++ __u32 LEN_NAME;
++#define pci_unmap_addr(PTR, ADDR_NAME) \
++ ((PTR)->ADDR_NAME)
++#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
++ (((PTR)->ADDR_NAME) = (VAL))
++#define pci_unmap_len(PTR, LEN_NAME) \
++ ((PTR)->LEN_NAME)
++#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
++ (((PTR)->LEN_NAME) = (VAL))
++
++#else
++
++/* The PCI address space does equal the physical memory
++ * address space. The networking and block device layers use
++ * this boolean for bounce buffer decisions.
++ */
++#define PCI_DMA_BUS_IS_PHYS (1)
++
++/* pci_unmap_{page,single} is a nop so... */
++#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
++#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
++#define pci_unmap_addr(PTR, ADDR_NAME) (0)
++#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
++#define pci_unmap_len(PTR, LEN_NAME) (0)
++#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
++
++#endif
++
++/* This is always fine. */
++#define pci_dac_dma_supported(pci_dev, mask) (1)
++
++static inline dma64_addr_t
++pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
++{
++ return ((dma64_addr_t) page_to_phys(page) +
++ (dma64_addr_t) offset);
++}
++
++static inline struct page *
++pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
++{
++ return pfn_to_page(dma_addr >> PAGE_SHIFT);
++}
++
++static inline unsigned long
++pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
++{
++ return (dma_addr & ~PAGE_MASK);
++}
++
++static inline void
++pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
++{
++}
++
++static inline void
++pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
++{
++ flush_write_buffers();
++}
++
++#define HAVE_PCI_MMAP
++extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
++ enum pci_mmap_state mmap_state, int write_combine);
++
++
++static inline void pcibios_add_platform_entries(struct pci_dev *dev)
++{
++}
++
++#ifdef CONFIG_PCI
++static inline void pci_dma_burst_advice(struct pci_dev *pdev,
++ enum pci_dma_burst_strategy *strat,
++ unsigned long *strategy_parameter)
++{
++ *strat = PCI_DMA_BURST_INFINITY;
++ *strategy_parameter = ~0UL;
++}
++#endif
++
++#endif /* __KERNEL__ */
++
++#ifdef CONFIG_XEN_PCIDEV_FRONTEND
++#include <xen/pcifront.h>
++#endif /* CONFIG_XEN_PCIDEV_FRONTEND */
++
++/* implement the pci_ DMA API in terms of the generic device dma_ one */
++#include <asm-generic/pci-dma-compat.h>
++
++/* generic pci stuff */
++#include <asm-generic/pci.h>
++
++#endif /* __i386_PCI_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pgalloc_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pgalloc_32.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,59 @@
++#ifndef _I386_PGALLOC_H
++#define _I386_PGALLOC_H
++
++#include <asm/fixmap.h>
++#include <linux/threads.h>
++#include <linux/mm.h> /* for struct page */
++#include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
++
++#define pmd_populate_kernel(mm, pmd, pte) \
++ set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
++
++#define pmd_populate(mm, pmd, pte) \
++do { \
++ unsigned long pfn = page_to_pfn(pte); \
++ if (test_bit(PG_pinned, &virt_to_page((mm)->pgd)->flags)) { \
++ if (!PageHighMem(pte)) \
++ BUG_ON(HYPERVISOR_update_va_mapping( \
++ (unsigned long)__va(pfn << PAGE_SHIFT), \
++ pfn_pte(pfn, PAGE_KERNEL_RO), 0)); \
++ else if (!test_and_set_bit(PG_pinned, &pte->flags)) \
++ kmap_flush_unused(); \
++ set_pmd(pmd, \
++ __pmd(_PAGE_TABLE + ((paddr_t)pfn << PAGE_SHIFT))); \
++ } else \
++ *(pmd) = __pmd(_PAGE_TABLE + ((paddr_t)pfn << PAGE_SHIFT)); \
++} while (0)
++
++/*
++ * Allocate and free page tables.
++ */
++extern pgd_t *pgd_alloc(struct mm_struct *);
++extern void pgd_free(pgd_t *pgd);
++
++extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
++extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
++
++static inline void pte_free_kernel(pte_t *pte)
++{
++ make_lowmem_page_writable(pte, XENFEAT_writable_page_tables);
++ free_page((unsigned long)pte);
++}
++
++extern void pte_free(struct page *pte);
++
++#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
++
++#ifdef CONFIG_X86_PAE
++/*
++ * In the PAE case we free the pmds as part of the pgd.
++ */
++#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
++#define pmd_free(x) do { } while (0)
++#define __pmd_free_tlb(tlb,x) do { } while (0)
++#define pud_populate(mm, pmd, pte) BUG()
++#endif
++
++#define check_pgt_cache() do { } while (0)
++
++#endif /* _I386_PGALLOC_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable-3level-defs.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable-3level-defs.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,24 @@
++#ifndef _I386_PGTABLE_3LEVEL_DEFS_H
++#define _I386_PGTABLE_3LEVEL_DEFS_H
++
++#define HAVE_SHARED_KERNEL_PMD 0
++
++/*
++ * PGDIR_SHIFT determines what a top-level page table entry can map
++ */
++#define PGDIR_SHIFT 30
++#define PTRS_PER_PGD 4
++
++/*
++ * PMD_SHIFT determines the size of the area a middle-level
++ * page table can map
++ */
++#define PMD_SHIFT 21
++#define PTRS_PER_PMD 512
++
++/*
++ * entries per page directory level
++ */
++#define PTRS_PER_PTE 512
++
++#endif /* _I386_PGTABLE_3LEVEL_DEFS_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable-3level.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,211 @@
++#ifndef _I386_PGTABLE_3LEVEL_H
++#define _I386_PGTABLE_3LEVEL_H
++
++#include <asm-generic/pgtable-nopud.h>
++
++/*
++ * Intel Physical Address Extension (PAE) Mode - three-level page
++ * tables on PPro+ CPUs.
++ *
++ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
++ */
++
++#define pte_ERROR(e) \
++ printk("%s:%d: bad pte %p(%016Lx pfn %08lx).\n", __FILE__, __LINE__, \
++ &(e), __pte_val(e), pte_pfn(e))
++#define pmd_ERROR(e) \
++ printk("%s:%d: bad pmd %p(%016Lx pfn %08Lx).\n", __FILE__, __LINE__, \
++ &(e), __pmd_val(e), (pmd_val(e) & PTE_MASK) >> PAGE_SHIFT)
++#define pgd_ERROR(e) \
++ printk("%s:%d: bad pgd %p(%016Lx pfn %08Lx).\n", __FILE__, __LINE__, \
++ &(e), __pgd_val(e), (pgd_val(e) & PTE_MASK) >> PAGE_SHIFT)
++
++#define pud_none(pud) 0
++#define pud_bad(pud) 0
++#define pud_present(pud) 1
++
++/*
++ * Is the pte executable?
++ */
++static inline int pte_x(pte_t pte)
++{
++ return !(__pte_val(pte) & _PAGE_NX);
++}
++
++/*
++ * All present user-pages with !NX bit are user-executable:
++ */
++static inline int pte_exec(pte_t pte)
++{
++ return pte_user(pte) && pte_x(pte);
++}
++/*
++ * All present pages with !NX bit are kernel-executable:
++ */
++static inline int pte_exec_kernel(pte_t pte)
++{
++ return pte_x(pte);
++}
++
++/* Rules for using set_pte: the pte being assigned *must* be
++ * either not present or in a state where the hardware will
++ * not attempt to update the pte. In places where this is
++ * not possible, use pte_get_and_clear to obtain the old pte
++ * value and then use set_pte to update it. -ben
++ */
++#define __HAVE_ARCH_SET_PTE_ATOMIC
++
++static inline void set_pte(pte_t *ptep, pte_t pte)
++{
++ ptep->pte_high = pte.pte_high;
++ smp_wmb();
++ ptep->pte_low = pte.pte_low;
++}
++#define set_pte_atomic(pteptr,pteval) \
++ set_64bit((unsigned long long *)(pteptr),__pte_val(pteval))
++
++#define set_pte_at(_mm,addr,ptep,pteval) do { \
++ if (((_mm) != current->mm && (_mm) != &init_mm) || \
++ HYPERVISOR_update_va_mapping((addr), (pteval), 0)) \
++ set_pte((ptep), (pteval)); \
++} while (0)
++
++#define set_pte_at_sync(_mm,addr,ptep,pteval) do { \
++ if (((_mm) != current->mm && (_mm) != &init_mm) || \
++ HYPERVISOR_update_va_mapping((addr), (pteval), UVMF_INVLPG)) { \
++ set_pte((ptep), (pteval)); \
++ xen_invlpg((addr)); \
++ } \
++} while (0)
++
++#define set_pmd(pmdptr,pmdval) \
++ xen_l2_entry_update((pmdptr), (pmdval))
++#define set_pud(pudptr,pudval) \
++ xen_l3_entry_update((pudptr), (pudval))
++
++/*
++ * Pentium-II erratum A13: in PAE mode we explicitly have to flush
++ * the TLB via cr3 if the top-level pgd is changed...
++ * We do not let the generic code free and clear pgd entries due to
++ * this erratum.
++ */
++static inline void pud_clear (pud_t * pud) { }
++
++#define pud_page(pud) \
++((struct page *) __va(pud_val(pud) & PAGE_MASK))
++
++#define pud_page_kernel(pud) \
++((unsigned long) __va(pud_val(pud) & PAGE_MASK))
++
++
++/* Find an entry in the second-level page table.. */
++#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
++ pmd_index(address))
++
++static inline int pte_none(pte_t pte)
++{
++ return !(pte.pte_low | pte.pte_high);
++}
++
++/*
++ * For PTEs and PDEs, we must clear the P-bit first when clearing a page table
++ * entry, so clear the bottom half first and enforce ordering with a compiler
++ * barrier.
++ */
++static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ if ((mm != current->mm && mm != &init_mm)
++ || HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
++ ptep->pte_low = 0;
++ smp_wmb();
++ ptep->pte_high = 0;
++ }
++}
++
++#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
++
++static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ pte_t pte = *ptep;
++ if (!pte_none(pte)) {
++ if ((mm != &init_mm) ||
++ HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
++ uint64_t val = __pte_val(pte);
++ if (__cmpxchg64(ptep, val, 0) != val) {
++ /* xchg acts as a barrier before the setting of the high bits */
++ pte.pte_low = xchg(&ptep->pte_low, 0);
++ pte.pte_high = ptep->pte_high;
++ ptep->pte_high = 0;
++ }
++ }
++ }
++ return pte;
++}
++
++#define ptep_clear_flush(vma, addr, ptep) \
++({ \
++ pte_t *__ptep = (ptep); \
++ pte_t __res = *__ptep; \
++ if (!pte_none(__res) && \
++ ((vma)->vm_mm != current->mm || \
++ HYPERVISOR_update_va_mapping(addr, __pte(0), \
++ (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
++ UVMF_INVLPG|UVMF_MULTI))) { \
++ __ptep->pte_low = 0; \
++ smp_wmb(); \
++ __ptep->pte_high = 0; \
++ flush_tlb_page(vma, addr); \
++ } \
++ __res; \
++})
++
++static inline int pte_same(pte_t a, pte_t b)
++{
++ return a.pte_low == b.pte_low && a.pte_high == b.pte_high;
++}
++
++#define pte_page(x) pfn_to_page(pte_pfn(x))
++
++#define __pte_mfn(_pte) (((_pte).pte_low >> PAGE_SHIFT) | \
++ ((_pte).pte_high << (32-PAGE_SHIFT)))
++#define pte_mfn(_pte) ((_pte).pte_low & _PAGE_PRESENT ? \
++ __pte_mfn(_pte) : pfn_to_mfn(__pte_mfn(_pte)))
++#define pte_pfn(_pte) ((_pte).pte_low & _PAGE_IO ? max_mapnr : \
++ (_pte).pte_low & _PAGE_PRESENT ? \
++ mfn_to_local_pfn(__pte_mfn(_pte)) : \
++ __pte_mfn(_pte))
++
++extern unsigned long long __supported_pte_mask;
++
++static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
++{
++ return __pte((((unsigned long long)page_nr << PAGE_SHIFT) |
++ pgprot_val(pgprot)) & __supported_pte_mask);
++}
++
++static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
++{
++ return __pmd((((unsigned long long)page_nr << PAGE_SHIFT) |
++ pgprot_val(pgprot)) & __supported_pte_mask);
++}
++
++/*
++ * Bits 0, 6 and 7 are taken in the low part of the pte,
++ * put the 32 bits of offset into the high part.
++ */
++#define pte_to_pgoff(pte) ((pte).pte_high)
++#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
++#define PTE_FILE_MAX_BITS 32
++
++/* Encode and de-code a swap entry */
++#define __swp_type(x) (((x).val) & 0x1f)
++#define __swp_offset(x) ((x).val >> 5)
++#define __swp_entry(type, offset) ((swp_entry_t){(type) | (offset) << 5})
++#define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high })
++#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val })
++
++#define __pmd_free_tlb(tlb, x) do { } while (0)
++
++void vmalloc_sync_all(void);
++
++#endif /* _I386_PGTABLE_3LEVEL_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,537 @@
++#ifndef _I386_PGTABLE_H
++#define _I386_PGTABLE_H
++
++#include <asm/hypervisor.h>
++
++/*
++ * The Linux memory management assumes a three-level page table setup. On
++ * the i386, we use that, but "fold" the mid level into the top-level page
++ * table, so that we physically have the same two-level page table as the
++ * i386 mmu expects.
++ *
++ * This file contains the functions and defines necessary to modify and use
++ * the i386 page table tree.
++ */
++#ifndef __ASSEMBLY__
++#include <asm/processor.h>
++#include <asm/fixmap.h>
++#include <linux/threads.h>
++
++#ifndef _I386_BITOPS_H
++#include <asm/bitops.h>
++#endif
++
++#include <linux/slab.h>
++#include <linux/list.h>
++#include <linux/spinlock.h>
++
++/* Is this pagetable pinned? */
++#define PG_pinned PG_arch_1
++
++struct mm_struct;
++struct vm_area_struct;
++
++/*
++ * ZERO_PAGE is a global shared page that is always zero: used
++ * for zero-mapped memory areas etc..
++ */
++#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
++extern unsigned long empty_zero_page[1024];
++extern pgd_t *swapper_pg_dir;
++extern kmem_cache_t *pgd_cache;
++extern kmem_cache_t *pmd_cache;
++extern spinlock_t pgd_lock;
++extern struct page *pgd_list;
++
++void pmd_ctor(void *, kmem_cache_t *, unsigned long);
++void pgd_ctor(void *, kmem_cache_t *, unsigned long);
++void pgd_dtor(void *, kmem_cache_t *, unsigned long);
++void pgtable_cache_init(void);
++void paging_init(void);
++
++/*
++ * The Linux x86 paging architecture is 'compile-time dual-mode', it
++ * implements both the traditional 2-level x86 page tables and the
++ * newer 3-level PAE-mode page tables.
++ */
++#ifdef CONFIG_X86_PAE
++# include <asm/pgtable-3level-defs.h>
++# define PMD_SIZE (1UL << PMD_SHIFT)
++# define PMD_MASK (~(PMD_SIZE-1))
++#else
++# include <asm/pgtable-2level-defs.h>
++#endif
++
++#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
++#define PGDIR_MASK (~(PGDIR_SIZE-1))
++
++#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
++#define FIRST_USER_ADDRESS 0
++
++#define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT)
++#define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS)
++
++#define TWOLEVEL_PGDIR_SHIFT 22
++#define BOOT_USER_PGD_PTRS (__PAGE_OFFSET >> TWOLEVEL_PGDIR_SHIFT)
++#define BOOT_KERNEL_PGD_PTRS (1024-BOOT_USER_PGD_PTRS)
++
++/* Just any arbitrary offset to the start of the vmalloc VM area: the
++ * current 8MB value just means that there will be a 8MB "hole" after the
++ * physical memory until the kernel virtual memory starts. That means that
++ * any out-of-bounds memory accesses will hopefully be caught.
++ * The vmalloc() routines leaves a hole of 4kB between each vmalloced
++ * area for the same reason. ;)
++ */
++#define VMALLOC_OFFSET (8*1024*1024)
++#define VMALLOC_START (((unsigned long) high_memory + vmalloc_earlyreserve + \
++ 2*VMALLOC_OFFSET-1) & ~(VMALLOC_OFFSET-1))
++#ifdef CONFIG_HIGHMEM
++# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
++#else
++# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
++#endif
++
++/*
++ * _PAGE_PSE set in the page directory entry just means that
++ * the page directory entry points directly to a 4MB-aligned block of
++ * memory.
++ */
++#define _PAGE_BIT_PRESENT 0
++#define _PAGE_BIT_RW 1
++#define _PAGE_BIT_USER 2
++#define _PAGE_BIT_PWT 3
++#define _PAGE_BIT_PCD 4
++#define _PAGE_BIT_ACCESSED 5
++#define _PAGE_BIT_DIRTY 6
++#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page, Pentium+, if present.. */
++#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
++/*#define _PAGE_BIT_UNUSED1 9*/ /* available for programmer */
++#define _PAGE_BIT_UNUSED2 10
++#define _PAGE_BIT_UNUSED3 11
++#define _PAGE_BIT_NX 63
++
++#define _PAGE_PRESENT 0x001
++#define _PAGE_RW 0x002
++#define _PAGE_USER 0x004
++#define _PAGE_PWT 0x008
++#define _PAGE_PCD 0x010
++#define _PAGE_ACCESSED 0x020
++#define _PAGE_DIRTY 0x040
++#define _PAGE_PSE 0x080 /* 4 MB (or 2MB) page, Pentium+, if present.. */
++#define _PAGE_GLOBAL 0x100 /* Global TLB entry PPro+ */
++/*#define _PAGE_UNUSED1 0x200*/ /* available for programmer */
++#define _PAGE_UNUSED2 0x400
++#define _PAGE_UNUSED3 0x800
++
++/* If _PAGE_PRESENT is clear, we use these: */
++#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */
++#define _PAGE_PROTNONE 0x080 /* if the user mapped it with PROT_NONE;
++ pte_present gives true */
++#ifdef CONFIG_X86_PAE
++#define _PAGE_NX (1ULL<<_PAGE_BIT_NX)
++#else
++#define _PAGE_NX 0
++#endif
++
++/* Mapped page is I/O or foreign and has no associated page struct. */
++#define _PAGE_IO 0x200
++
++#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
++#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
++#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_IO)
++
++#define PAGE_NONE \
++ __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
++#define PAGE_SHARED \
++ __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
++
++#define PAGE_SHARED_EXEC \
++ __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_COPY_NOEXEC \
++ __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_COPY_EXEC \
++ __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_COPY \
++ PAGE_COPY_NOEXEC
++#define PAGE_READONLY \
++ __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_READONLY_EXEC \
++ __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++
++#define _PAGE_KERNEL \
++ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX)
++#define _PAGE_KERNEL_EXEC \
++ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
++
++extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
++#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
++#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD)
++#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
++#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
++
++#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
++#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
++#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
++#define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
++#define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
++#define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
++
++/*
++ * The i386 can't do page protection for execute, and considers that
++ * the same are read. Also, write permissions imply read permissions.
++ * This is the closest we can get..
++ */
++#define __P000 PAGE_NONE
++#define __P001 PAGE_READONLY
++#define __P010 PAGE_COPY
++#define __P011 PAGE_COPY
++#define __P100 PAGE_READONLY_EXEC
++#define __P101 PAGE_READONLY_EXEC
++#define __P110 PAGE_COPY_EXEC
++#define __P111 PAGE_COPY_EXEC
++
++#define __S000 PAGE_NONE
++#define __S001 PAGE_READONLY
++#define __S010 PAGE_SHARED
++#define __S011 PAGE_SHARED
++#define __S100 PAGE_READONLY_EXEC
++#define __S101 PAGE_READONLY_EXEC
++#define __S110 PAGE_SHARED_EXEC
++#define __S111 PAGE_SHARED_EXEC
++
++/*
++ * Define this if things work differently on an i386 and an i486:
++ * it will (on an i486) warn about kernel memory accesses that are
++ * done without a 'access_ok(VERIFY_WRITE,..)'
++ */
++#undef TEST_ACCESS_OK
++
++/* The boot page tables (all created as a single array) */
++extern unsigned long pg0[];
++
++#define pte_present(x) ((x).pte_low & (_PAGE_PRESENT | _PAGE_PROTNONE))
++
++/* To avoid harmful races, pmd_none(x) should check only the lower when PAE */
++#define pmd_none(x) (!(unsigned long)__pmd_val(x))
++#if CONFIG_XEN_COMPAT <= 0x030002
++/* pmd_present doesn't just test the _PAGE_PRESENT bit since wr.p.t.
++ can temporarily clear it. */
++#define pmd_present(x) (__pmd_val(x))
++#define pmd_bad(x) ((__pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER & ~_PAGE_PRESENT)) != (_KERNPG_TABLE & ~_PAGE_PRESENT))
++#else
++#define pmd_present(x) (__pmd_val(x) & _PAGE_PRESENT)
++#define pmd_bad(x) ((__pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
++#endif
++
++
++#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
++
++/*
++ * The following only work if pte_present() is true.
++ * Undefined behaviour if not..
++ */
++static inline int pte_user(pte_t pte) { return (pte).pte_low & _PAGE_USER; }
++static inline int pte_read(pte_t pte) { return (pte).pte_low & _PAGE_USER; }
++static inline int pte_dirty(pte_t pte) { return (pte).pte_low & _PAGE_DIRTY; }
++static inline int pte_young(pte_t pte) { return (pte).pte_low & _PAGE_ACCESSED; }
++static inline int pte_write(pte_t pte) { return (pte).pte_low & _PAGE_RW; }
++static inline int pte_huge(pte_t pte) { return (pte).pte_low & _PAGE_PSE; }
++
++/*
++ * The following only works if pte_present() is not true.
++ */
++static inline int pte_file(pte_t pte) { return (pte).pte_low & _PAGE_FILE; }
++
++static inline pte_t pte_rdprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_USER; return pte; }
++static inline pte_t pte_exprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_USER; return pte; }
++static inline pte_t pte_mkclean(pte_t pte) { (pte).pte_low &= ~_PAGE_DIRTY; return pte; }
++static inline pte_t pte_mkold(pte_t pte) { (pte).pte_low &= ~_PAGE_ACCESSED; return pte; }
++static inline pte_t pte_wrprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_RW; return pte; }
++static inline pte_t pte_mkread(pte_t pte) { (pte).pte_low |= _PAGE_USER; return pte; }
++static inline pte_t pte_mkexec(pte_t pte) { (pte).pte_low |= _PAGE_USER; return pte; }
++static inline pte_t pte_mkdirty(pte_t pte) { (pte).pte_low |= _PAGE_DIRTY; return pte; }
++static inline pte_t pte_mkyoung(pte_t pte) { (pte).pte_low |= _PAGE_ACCESSED; return pte; }
++static inline pte_t pte_mkwrite(pte_t pte) { (pte).pte_low |= _PAGE_RW; return pte; }
++static inline pte_t pte_mkhuge(pte_t pte) { (pte).pte_low |= _PAGE_PSE; return pte; }
++
++#ifdef CONFIG_X86_PAE
++# include <asm/pgtable-3level.h>
++#else
++# include <asm/pgtable-2level.h>
++#endif
++
++#define ptep_test_and_clear_dirty(vma, addr, ptep) \
++({ \
++ pte_t __pte = *(ptep); \
++ int __ret = pte_dirty(__pte); \
++ if (__ret) { \
++ __pte = pte_mkclean(__pte); \
++ if ((vma)->vm_mm != current->mm || \
++ HYPERVISOR_update_va_mapping(addr, __pte, 0)) \
++ (ptep)->pte_low = __pte.pte_low; \
++ } \
++ __ret; \
++})
++
++#define ptep_test_and_clear_young(vma, addr, ptep) \
++({ \
++ pte_t __pte = *(ptep); \
++ int __ret = pte_young(__pte); \
++ if (__ret) \
++ __pte = pte_mkold(__pte); \
++ if ((vma)->vm_mm != current->mm || \
++ HYPERVISOR_update_va_mapping(addr, __pte, 0)) \
++ (ptep)->pte_low = __pte.pte_low; \
++ __ret; \
++})
++
++#define ptep_get_and_clear_full(mm, addr, ptep, full) \
++ ((full) ? ({ \
++ pte_t __res = *(ptep); \
++ if (test_bit(PG_pinned, &virt_to_page((mm)->pgd)->flags)) \
++ xen_l1_entry_update(ptep, __pte(0)); \
++ else \
++ *(ptep) = __pte(0); \
++ __res; \
++ }) : \
++ ptep_get_and_clear(mm, addr, ptep))
++
++static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ pte_t pte = *ptep;
++ if (pte_write(pte))
++ set_pte_at(mm, addr, ptep, pte_wrprotect(pte));
++}
++
++/*
++ * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
++ *
++ * dst - pointer to pgd range anwhere on a pgd page
++ * src - ""
++ * count - the number of pgds to copy.
++ *
++ * dst and src can be on the same page, but the range must not overlap,
++ * and must not cross a page boundary.
++ */
++static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
++{
++ memcpy(dst, src, count * sizeof(pgd_t));
++}
++
++/*
++ * Macro to mark a page protection value as "uncacheable". On processors which do not support
++ * it, this is a no-op.
++ */
++#define pgprot_noncached(prot) ((boot_cpu_data.x86 > 3) \
++ ? (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) : (prot))
++
++/*
++ * Conversion functions: convert a page and protection to a page entry,
++ * and a page entry and page directory to the page they refer to.
++ */
++
++#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
++
++static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
++{
++ /*
++ * Since this might change the present bit (which controls whether
++ * a pte_t object has undergone p2m translation), we must use
++ * pte_val() on the input pte and __pte() for the return value.
++ */
++ paddr_t pteval = pte_val(pte);
++
++ pteval &= _PAGE_CHG_MASK;
++ pteval |= pgprot_val(newprot);
++#ifdef CONFIG_X86_PAE
++ pteval &= __supported_pte_mask;
++#endif
++ return __pte(pteval);
++}
++
++#define pmd_large(pmd) \
++((__pmd_val(pmd) & (_PAGE_PSE|_PAGE_PRESENT)) == (_PAGE_PSE|_PAGE_PRESENT))
++
++/*
++ * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
++ *
++ * this macro returns the index of the entry in the pgd page which would
++ * control the given virtual address
++ */
++#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
++#define pgd_index_k(addr) pgd_index(addr)
++
++/*
++ * pgd_offset() returns a (pgd_t *)
++ * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
++ */
++#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
++
++/*
++ * a shortcut which implies the use of the kernel's pgd, instead
++ * of a process's
++ */
++#define pgd_offset_k(address) pgd_offset(&init_mm, address)
++
++/*
++ * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
++ *
++ * this macro returns the index of the entry in the pmd page which would
++ * control the given virtual address
++ */
++#define pmd_index(address) \
++ (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
++
++/*
++ * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
++ *
++ * this macro returns the index of the entry in the pte page which would
++ * control the given virtual address
++ */
++#define pte_index(address) \
++ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
++#define pte_offset_kernel(dir, address) \
++ ((pte_t *) pmd_page_kernel(*(dir)) + pte_index(address))
++
++#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
++
++#define pmd_page_kernel(pmd) \
++ ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
++
++/*
++ * Helper function that returns the kernel pagetable entry controlling
++ * the virtual address 'address'. NULL means no pagetable entry present.
++ * NOTE: the return type is pte_t but if the pmd is PSE then we return it
++ * as a pte too.
++ */
++extern pte_t *lookup_address(unsigned long address);
++
++/*
++ * Make a given kernel text page executable/non-executable.
++ * Returns the previous executability setting of that page (which
++ * is used to restore the previous state). Used by the SMP bootup code.
++ * NOTE: this is an __init function for security reasons.
++ */
++#ifdef CONFIG_X86_PAE
++ extern int set_kernel_exec(unsigned long vaddr, int enable);
++#else
++ static inline int set_kernel_exec(unsigned long vaddr, int enable) { return 0;}
++#endif
++
++extern void noexec_setup(const char *str);
++
++#if defined(CONFIG_HIGHPTE)
++#define pte_offset_map(dir, address) \
++ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + \
++ pte_index(address))
++#define pte_offset_map_nested(dir, address) \
++ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + \
++ pte_index(address))
++#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
++#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
++#else
++#define pte_offset_map(dir, address) \
++ ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
++#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
++#define pte_unmap(pte) do { } while (0)
++#define pte_unmap_nested(pte) do { } while (0)
++#endif
++
++#define __HAVE_ARCH_PTEP_ESTABLISH
++#define ptep_establish(vma, address, ptep, pteval) \
++ do { \
++ if ( likely((vma)->vm_mm == current->mm) ) { \
++ BUG_ON(HYPERVISOR_update_va_mapping(address, \
++ pteval, \
++ (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
++ UVMF_INVLPG|UVMF_MULTI)); \
++ } else { \
++ xen_l1_entry_update(ptep, pteval); \
++ flush_tlb_page(vma, address); \
++ } \
++ } while (0)
++
++/*
++ * The i386 doesn't have any external MMU info: the kernel page
++ * tables contain all the necessary information.
++ *
++ * Also, we only update the dirty/accessed state if we set
++ * the dirty bit by hand in the kernel, since the hardware
++ * will do the accessed bit for us, and we don't want to
++ * race with other CPU's that might be updating the dirty
++ * bit at the same time.
++ */
++#define update_mmu_cache(vma,address,pte) do { } while (0)
++#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
++#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
++ do { \
++ if (dirty) \
++ ptep_establish(vma, address, ptep, entry); \
++ } while (0)
++
++#include <xen/features.h>
++void make_lowmem_page_readonly(void *va, unsigned int feature);
++void make_lowmem_page_writable(void *va, unsigned int feature);
++void make_page_readonly(void *va, unsigned int feature);
++void make_page_writable(void *va, unsigned int feature);
++void make_pages_readonly(void *va, unsigned int nr, unsigned int feature);
++void make_pages_writable(void *va, unsigned int nr, unsigned int feature);
++
++#define virt_to_ptep(va) \
++({ \
++ pte_t *__ptep = lookup_address((unsigned long)(va)); \
++ BUG_ON(!__ptep || !pte_present(*__ptep)); \
++ __ptep; \
++})
++
++#define arbitrary_virt_to_machine(va) \
++ (((maddr_t)pte_mfn(*virt_to_ptep(va)) << PAGE_SHIFT) \
++ | ((unsigned long)(va) & (PAGE_SIZE - 1)))
++
++#endif /* !__ASSEMBLY__ */
++
++#ifdef CONFIG_FLATMEM
++#define kern_addr_valid(addr) (1)
++#endif /* CONFIG_FLATMEM */
++
++int direct_remap_pfn_range(struct vm_area_struct *vma,
++ unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid);
++int direct_kernel_remap_pfn_range(unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid);
++int create_lookup_pte_addr(struct mm_struct *mm,
++ unsigned long address,
++ uint64_t *ptep);
++int touch_pte_range(struct mm_struct *mm,
++ unsigned long address,
++ unsigned long size);
++
++int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
++ unsigned long addr, unsigned long end, pgprot_t newprot);
++
++#define arch_change_pte_range(mm, pmd, addr, end, newprot) \
++ xen_change_pte_range(mm, pmd, addr, end, newprot)
++
++#define io_remap_pfn_range(vma,from,pfn,size,prot) \
++direct_remap_pfn_range(vma,from,pfn,size,prot,DOMID_IO)
++
++#define MK_IOSPACE_PFN(space, pfn) (pfn)
++#define GET_IOSPACE(pfn) 0
++#define GET_PFN(pfn) (pfn)
++
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
++#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
++#define __HAVE_ARCH_PTEP_SET_WRPROTECT
++#define __HAVE_ARCH_PTE_SAME
++#include <asm-generic/pgtable.h>
++
++#endif /* _I386_PGTABLE_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/processor_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/processor_32.h 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,743 @@
++/*
++ * include/asm-i386/processor.h
++ *
++ * Copyright (C) 1994 Linus Torvalds
++ */
++
++#ifndef __ASM_I386_PROCESSOR_H
++#define __ASM_I386_PROCESSOR_H
++
++#include <asm/vm86.h>
++#include <asm/math_emu.h>
++#include <asm/segment.h>
++#include <asm/page.h>
++#include <asm/types.h>
++#include <asm/sigcontext.h>
++#include <asm/cpufeature.h>
++#include <asm/msr.h>
++#include <asm/system.h>
++#include <linux/cache.h>
++#include <linux/threads.h>
++#include <asm/percpu.h>
++#include <linux/cpumask.h>
++#include <xen/interface/physdev.h>
++
++/* flag for disabling the tsc */
++extern int tsc_disable;
++
++struct desc_struct {
++ unsigned long a,b;
++};
++
++#define desc_empty(desc) \
++ (!((desc)->a | (desc)->b))
++
++#define desc_equal(desc1, desc2) \
++ (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
++/*
++ * Default implementation of macro that returns current
++ * instruction pointer ("program counter").
++ */
++#define current_text_addr() ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
++
++/*
++ * CPU type and hardware bug flags. Kept separately for each CPU.
++ * Members of this structure are referenced in head.S, so think twice
++ * before touching them. [mj]
++ */
++
++struct cpuinfo_x86 {
++ __u8 x86; /* CPU family */
++ __u8 x86_vendor; /* CPU vendor */
++ __u8 x86_model;
++ __u8 x86_mask;
++ char wp_works_ok; /* It doesn't on 386's */
++ char hlt_works_ok; /* Problems on some 486Dx4's and old 386's */
++ char hard_math;
++ char rfu;
++ int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */
++ unsigned long x86_capability[NCAPINTS];
++ char x86_vendor_id[16];
++ char x86_model_id[64];
++ int x86_cache_size; /* in KB - valid for CPUS which support this
++ call */
++ int x86_cache_alignment; /* In bytes */
++ char fdiv_bug;
++ char f00f_bug;
++ char coma_bug;
++ char pad0;
++ int x86_power;
++ unsigned long loops_per_jiffy;
++#ifdef CONFIG_SMP
++ cpumask_t llc_shared_map; /* cpus sharing the last level cache */
++#endif
++ unsigned char x86_max_cores; /* cpuid returned max cores value */
++ unsigned char apicid;
++#ifdef CONFIG_SMP
++ unsigned char booted_cores; /* number of cores as seen by OS */
++ __u8 phys_proc_id; /* Physical processor id. */
++ __u8 cpu_core_id; /* Core id */
++#endif
++} __attribute__((__aligned__(SMP_CACHE_BYTES)));
++
++#define X86_VENDOR_INTEL 0
++#define X86_VENDOR_CYRIX 1
++#define X86_VENDOR_AMD 2
++#define X86_VENDOR_UMC 3
++#define X86_VENDOR_NEXGEN 4
++#define X86_VENDOR_CENTAUR 5
++#define X86_VENDOR_RISE 6
++#define X86_VENDOR_TRANSMETA 7
++#define X86_VENDOR_NSC 8
++#define X86_VENDOR_NUM 9
++#define X86_VENDOR_UNKNOWN 0xff
++
++/*
++ * capabilities of CPUs
++ */
++
++extern struct cpuinfo_x86 boot_cpu_data;
++extern struct cpuinfo_x86 new_cpu_data;
++#ifndef CONFIG_X86_NO_TSS
++extern struct tss_struct doublefault_tss;
++DECLARE_PER_CPU(struct tss_struct, init_tss);
++#endif
++
++#ifdef CONFIG_SMP
++extern struct cpuinfo_x86 cpu_data[];
++#define current_cpu_data cpu_data[smp_processor_id()]
++#else
++#define cpu_data (&boot_cpu_data)
++#define current_cpu_data boot_cpu_data
++#endif
++
++extern int cpu_llc_id[NR_CPUS];
++extern char ignore_fpu_irq;
++
++extern void identify_cpu(struct cpuinfo_x86 *);
++extern void print_cpu_info(struct cpuinfo_x86 *);
++extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
++extern unsigned short num_cache_leaves;
++
++#ifdef CONFIG_X86_HT
++extern void detect_ht(struct cpuinfo_x86 *c);
++#else
++static inline void detect_ht(struct cpuinfo_x86 *c) {}
++#endif
++
++/*
++ * EFLAGS bits
++ */
++#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */
++#define X86_EFLAGS_PF 0x00000004 /* Parity Flag */
++#define X86_EFLAGS_AF 0x00000010 /* Auxillary carry Flag */
++#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */
++#define X86_EFLAGS_SF 0x00000080 /* Sign Flag */
++#define X86_EFLAGS_TF 0x00000100 /* Trap Flag */
++#define X86_EFLAGS_IF 0x00000200 /* Interrupt Flag */
++#define X86_EFLAGS_DF 0x00000400 /* Direction Flag */
++#define X86_EFLAGS_OF 0x00000800 /* Overflow Flag */
++#define X86_EFLAGS_IOPL 0x00003000 /* IOPL mask */
++#define X86_EFLAGS_NT 0x00004000 /* Nested Task */
++#define X86_EFLAGS_RF 0x00010000 /* Resume Flag */
++#define X86_EFLAGS_VM 0x00020000 /* Virtual Mode */
++#define X86_EFLAGS_AC 0x00040000 /* Alignment Check */
++#define X86_EFLAGS_VIF 0x00080000 /* Virtual Interrupt Flag */
++#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
++#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
++
++/*
++ * Generic CPUID function
++ * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
++ * resulting in stale register contents being returned.
++ */
++static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx)
++{
++ __asm__(XEN_CPUID
++ : "=a" (*eax),
++ "=b" (*ebx),
++ "=c" (*ecx),
++ "=d" (*edx)
++ : "0" (op), "c"(0));
++}
++
++/* Some CPUID calls want 'count' to be placed in ecx */
++static inline void cpuid_count(int op, int count, int *eax, int *ebx, int *ecx,
++ int *edx)
++{
++ __asm__(XEN_CPUID
++ : "=a" (*eax),
++ "=b" (*ebx),
++ "=c" (*ecx),
++ "=d" (*edx)
++ : "0" (op), "c" (count));
++}
++
++/*
++ * CPUID functions returning a single datum
++ */
++static inline unsigned int cpuid_eax(unsigned int op)
++{
++ unsigned int eax;
++
++ __asm__(XEN_CPUID
++ : "=a" (eax)
++ : "0" (op)
++ : "bx", "cx", "dx");
++ return eax;
++}
++static inline unsigned int cpuid_ebx(unsigned int op)
++{
++ unsigned int eax, ebx;
++
++ __asm__(XEN_CPUID
++ : "=a" (eax), "=b" (ebx)
++ : "0" (op)
++ : "cx", "dx" );
++ return ebx;
++}
++static inline unsigned int cpuid_ecx(unsigned int op)
++{
++ unsigned int eax, ecx;
++
++ __asm__(XEN_CPUID
++ : "=a" (eax), "=c" (ecx)
++ : "0" (op)
++ : "bx", "dx" );
++ return ecx;
++}
++static inline unsigned int cpuid_edx(unsigned int op)
++{
++ unsigned int eax, edx;
++
++ __asm__(XEN_CPUID
++ : "=a" (eax), "=d" (edx)
++ : "0" (op)
++ : "bx", "cx");
++ return edx;
++}
++
++#define load_cr3(pgdir) write_cr3(__pa(pgdir))
++
++/*
++ * Intel CPU features in CR4
++ */
++#define X86_CR4_VME 0x0001 /* enable vm86 extensions */
++#define X86_CR4_PVI 0x0002 /* virtual interrupts flag enable */
++#define X86_CR4_TSD 0x0004 /* disable time stamp at ipl 3 */
++#define X86_CR4_DE 0x0008 /* enable debugging extensions */
++#define X86_CR4_PSE 0x0010 /* enable page size extensions */
++#define X86_CR4_PAE 0x0020 /* enable physical address extensions */
++#define X86_CR4_MCE 0x0040 /* Machine check enable */
++#define X86_CR4_PGE 0x0080 /* enable global pages */
++#define X86_CR4_PCE 0x0100 /* enable performance counters at ipl 3 */
++#define X86_CR4_OSFXSR 0x0200 /* enable fast FPU save and restore */
++#define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */
++
++/*
++ * Save the cr4 feature set we're using (ie
++ * Pentium 4MB enable and PPro Global page
++ * enable), so that any CPU's that boot up
++ * after us can get the correct flags.
++ */
++extern unsigned long mmu_cr4_features;
++
++static inline void set_in_cr4 (unsigned long mask)
++{
++ unsigned cr4;
++ mmu_cr4_features |= mask;
++ cr4 = read_cr4();
++ cr4 |= mask;
++ write_cr4(cr4);
++}
++
++static inline void clear_in_cr4 (unsigned long mask)
++{
++ unsigned cr4;
++ mmu_cr4_features &= ~mask;
++ cr4 = read_cr4();
++ cr4 &= ~mask;
++ write_cr4(cr4);
++}
++
++/*
++ * NSC/Cyrix CPU configuration register indexes
++ */
++
++#define CX86_PCR0 0x20
++#define CX86_GCR 0xb8
++#define CX86_CCR0 0xc0
++#define CX86_CCR1 0xc1
++#define CX86_CCR2 0xc2
++#define CX86_CCR3 0xc3
++#define CX86_CCR4 0xe8
++#define CX86_CCR5 0xe9
++#define CX86_CCR6 0xea
++#define CX86_CCR7 0xeb
++#define CX86_PCR1 0xf0
++#define CX86_DIR0 0xfe
++#define CX86_DIR1 0xff
++#define CX86_ARR_BASE 0xc4
++#define CX86_RCR_BASE 0xdc
++
++/*
++ * NSC/Cyrix CPU indexed register access macros
++ */
++
++#define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); })
++
++#define setCx86(reg, data) do { \
++ outb((reg), 0x22); \
++ outb((data), 0x23); \
++} while (0)
++
++/* Stop speculative execution */
++static inline void sync_core(void)
++{
++ int tmp;
++ asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory");
++}
++
++static inline void __monitor(const void *eax, unsigned long ecx,
++ unsigned long edx)
++{
++ /* "monitor %eax,%ecx,%edx;" */
++ asm volatile(
++ ".byte 0x0f,0x01,0xc8;"
++ : :"a" (eax), "c" (ecx), "d"(edx));
++}
++
++static inline void __mwait(unsigned long eax, unsigned long ecx)
++{
++ /* "mwait %eax,%ecx;" */
++ asm volatile(
++ ".byte 0x0f,0x01,0xc9;"
++ : :"a" (eax), "c" (ecx));
++}
++
++/* from system description table in BIOS. Mostly for MCA use, but
++others may find it useful. */
++extern unsigned int machine_id;
++extern unsigned int machine_submodel_id;
++extern unsigned int BIOS_revision;
++extern unsigned int mca_pentium_flag;
++
++/* Boot loader type from the setup header */
++extern int bootloader_type;
++
++/*
++ * User space process size: 3GB (default).
++ */
++#define TASK_SIZE (PAGE_OFFSET)
++
++/* This decides where the kernel will search for a free chunk of vm
++ * space during mmap's.
++ */
++#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
++
++#define HAVE_ARCH_PICK_MMAP_LAYOUT
++
++/*
++ * Size of io_bitmap.
++ */
++#define IO_BITMAP_BITS 65536
++#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
++#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
++#ifndef CONFIG_X86_NO_TSS
++#define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap)
++#endif
++#define INVALID_IO_BITMAP_OFFSET 0x8000
++#define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000
++
++struct i387_fsave_struct {
++ long cwd;
++ long swd;
++ long twd;
++ long fip;
++ long fcs;
++ long foo;
++ long fos;
++ long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
++ long status; /* software status information */
++};
++
++struct i387_fxsave_struct {
++ unsigned short cwd;
++ unsigned short swd;
++ unsigned short twd;
++ unsigned short fop;
++ long fip;
++ long fcs;
++ long foo;
++ long fos;
++ long mxcsr;
++ long mxcsr_mask;
++ long st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
++ long xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
++ long padding[56];
++} __attribute__ ((aligned (16)));
++
++struct i387_soft_struct {
++ long cwd;
++ long swd;
++ long twd;
++ long fip;
++ long fcs;
++ long foo;
++ long fos;
++ long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
++ unsigned char ftop, changed, lookahead, no_update, rm, alimit;
++ struct info *info;
++ unsigned long entry_eip;
++};
++
++union i387_union {
++ struct i387_fsave_struct fsave;
++ struct i387_fxsave_struct fxsave;
++ struct i387_soft_struct soft;
++};
++
++typedef struct {
++ unsigned long seg;
++} mm_segment_t;
++
++struct thread_struct;
++
++#ifndef CONFIG_X86_NO_TSS
++struct tss_struct {
++ unsigned short back_link,__blh;
++ unsigned long esp0;
++ unsigned short ss0,__ss0h;
++ unsigned long esp1;
++ unsigned short ss1,__ss1h; /* ss1 is used to cache MSR_IA32_SYSENTER_CS */
++ unsigned long esp2;
++ unsigned short ss2,__ss2h;
++ unsigned long __cr3;
++ unsigned long eip;
++ unsigned long eflags;
++ unsigned long eax,ecx,edx,ebx;
++ unsigned long esp;
++ unsigned long ebp;
++ unsigned long esi;
++ unsigned long edi;
++ unsigned short es, __esh;
++ unsigned short cs, __csh;
++ unsigned short ss, __ssh;
++ unsigned short ds, __dsh;
++ unsigned short fs, __fsh;
++ unsigned short gs, __gsh;
++ unsigned short ldt, __ldth;
++ unsigned short trace, io_bitmap_base;
++ /*
++ * The extra 1 is there because the CPU will access an
++ * additional byte beyond the end of the IO permission
++ * bitmap. The extra byte must be all 1 bits, and must
++ * be within the limit.
++ */
++ unsigned long io_bitmap[IO_BITMAP_LONGS + 1];
++ /*
++ * Cache the current maximum and the last task that used the bitmap:
++ */
++ unsigned long io_bitmap_max;
++ struct thread_struct *io_bitmap_owner;
++ /*
++ * pads the TSS to be cacheline-aligned (size is 0x100)
++ */
++ unsigned long __cacheline_filler[35];
++ /*
++ * .. and then another 0x100 bytes for emergency kernel stack
++ */
++ unsigned long stack[64];
++} __attribute__((packed));
++#endif
++
++#define ARCH_MIN_TASKALIGN 16
++
++struct thread_struct {
++/* cached TLS descriptors. */
++ struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
++ unsigned long esp0;
++ unsigned long sysenter_cs;
++ unsigned long eip;
++ unsigned long esp;
++ unsigned long fs;
++ unsigned long gs;
++/* Hardware debugging registers */
++ unsigned long debugreg[8]; /* %%db0-7 debug registers */
++/* fault info */
++ unsigned long cr2, trap_no, error_code;
++/* floating point info */
++ union i387_union i387;
++/* virtual 86 mode info */
++ struct vm86_struct __user * vm86_info;
++ unsigned long screen_bitmap;
++ unsigned long v86flags, v86mask, saved_esp0;
++ unsigned int saved_fs, saved_gs;
++/* IO permissions */
++ unsigned long *io_bitmap_ptr;
++ unsigned long iopl;
++/* max allowed port in the bitmap, in bytes: */
++ unsigned long io_bitmap_max;
++};
++
++#define INIT_THREAD { \
++ .vm86_info = NULL, \
++ .sysenter_cs = __KERNEL_CS, \
++ .io_bitmap_ptr = NULL, \
++}
++
++#ifndef CONFIG_X86_NO_TSS
++/*
++ * Note that the .io_bitmap member must be extra-big. This is because
++ * the CPU will access an additional byte beyond the end of the IO
++ * permission bitmap. The extra byte must be all 1 bits, and must
++ * be within the limit.
++ */
++#define INIT_TSS { \
++ .esp0 = sizeof(init_stack) + (long)&init_stack, \
++ .ss0 = __KERNEL_DS, \
++ .ss1 = __KERNEL_CS, \
++ .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
++ .io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
++}
++
++static inline void __load_esp0(struct tss_struct *tss, struct thread_struct *thread)
++{
++ tss->esp0 = thread->esp0;
++ /* This can only happen when SEP is enabled, no need to test "SEP"arately */
++ if (unlikely(tss->ss1 != thread->sysenter_cs)) {
++ tss->ss1 = thread->sysenter_cs;
++ wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
++ }
++}
++#define load_esp0(tss, thread) \
++ __load_esp0(tss, thread)
++#else
++#define load_esp0(tss, thread) do { \
++ if (HYPERVISOR_stack_switch(__KERNEL_DS, (thread)->esp0)) \
++ BUG(); \
++} while (0)
++#endif
++
++#define start_thread(regs, new_eip, new_esp) do { \
++ __asm__("movl %0,%%fs ; movl %0,%%gs": :"r" (0)); \
++ set_fs(USER_DS); \
++ regs->xds = __USER_DS; \
++ regs->xes = __USER_DS; \
++ regs->xss = __USER_DS; \
++ regs->xcs = __USER_CS; \
++ regs->eip = new_eip; \
++ regs->esp = new_esp; \
++} while (0)
++
++/*
++ * These special macros can be used to get or set a debugging register
++ */
++#define get_debugreg(var, register) \
++ (var) = HYPERVISOR_get_debugreg((register))
++#define set_debugreg(value, register) \
++ WARN_ON(HYPERVISOR_set_debugreg((register), (value)))
++
++/*
++ * Set IOPL bits in EFLAGS from given mask
++ */
++static inline void set_iopl_mask(unsigned mask)
++{
++ struct physdev_set_iopl set_iopl;
++
++ /* Force the change at ring 0. */
++ set_iopl.iopl = (mask == 0) ? 1 : (mask >> 12) & 3;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
++}
++
++/* Forward declaration, a strange C thing */
++struct task_struct;
++struct mm_struct;
++
++/* Free all resources held by a thread. */
++extern void release_thread(struct task_struct *);
++
++/* Prepare to copy thread state - unlazy all lazy status */
++extern void prepare_to_copy(struct task_struct *tsk);
++
++/*
++ * create a kernel thread without removing it from tasklists
++ */
++extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
++
++extern unsigned long thread_saved_pc(struct task_struct *tsk);
++void show_trace(struct task_struct *task, struct pt_regs *regs, unsigned long *stack);
++
++unsigned long get_wchan(struct task_struct *p);
++
++#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
++#define KSTK_TOP(info) \
++({ \
++ unsigned long *__ptr = (unsigned long *)(info); \
++ (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \
++})
++
++/*
++ * The below -8 is to reserve 8 bytes on top of the ring0 stack.
++ * This is necessary to guarantee that the entire "struct pt_regs"
++ * is accessable even if the CPU haven't stored the SS/ESP registers
++ * on the stack (interrupt gate does not save these registers
++ * when switching to the same priv ring).
++ * Therefore beware: accessing the xss/esp fields of the
++ * "struct pt_regs" is possible, but they may contain the
++ * completely wrong values.
++ */
++#define task_pt_regs(task) \
++({ \
++ struct pt_regs *__regs__; \
++ __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
++ __regs__ - 1; \
++})
++
++#define KSTK_EIP(task) (task_pt_regs(task)->eip)
++#define KSTK_ESP(task) (task_pt_regs(task)->esp)
++
++
++struct microcode_header {
++ unsigned int hdrver;
++ unsigned int rev;
++ unsigned int date;
++ unsigned int sig;
++ unsigned int cksum;
++ unsigned int ldrver;
++ unsigned int pf;
++ unsigned int datasize;
++ unsigned int totalsize;
++ unsigned int reserved[3];
++};
++
++struct microcode {
++ struct microcode_header hdr;
++ unsigned int bits[0];
++};
++
++typedef struct microcode microcode_t;
++typedef struct microcode_header microcode_header_t;
++
++/* microcode format is extended from prescott processors */
++struct extended_signature {
++ unsigned int sig;
++ unsigned int pf;
++ unsigned int cksum;
++};
++
++struct extended_sigtable {
++ unsigned int count;
++ unsigned int cksum;
++ unsigned int reserved[3];
++ struct extended_signature sigs[0];
++};
++
++/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
++static inline void rep_nop(void)
++{
++ __asm__ __volatile__("rep;nop": : :"memory");
++}
++
++#define cpu_relax() rep_nop()
++
++/* generic versions from gas */
++#define GENERIC_NOP1 ".byte 0x90\n"
++#define GENERIC_NOP2 ".byte 0x89,0xf6\n"
++#define GENERIC_NOP3 ".byte 0x8d,0x76,0x00\n"
++#define GENERIC_NOP4 ".byte 0x8d,0x74,0x26,0x00\n"
++#define GENERIC_NOP5 GENERIC_NOP1 GENERIC_NOP4
++#define GENERIC_NOP6 ".byte 0x8d,0xb6,0x00,0x00,0x00,0x00\n"
++#define GENERIC_NOP7 ".byte 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00\n"
++#define GENERIC_NOP8 GENERIC_NOP1 GENERIC_NOP7
++
++/* Opteron nops */
++#define K8_NOP1 GENERIC_NOP1
++#define K8_NOP2 ".byte 0x66,0x90\n"
++#define K8_NOP3 ".byte 0x66,0x66,0x90\n"
++#define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n"
++#define K8_NOP5 K8_NOP3 K8_NOP2
++#define K8_NOP6 K8_NOP3 K8_NOP3
++#define K8_NOP7 K8_NOP4 K8_NOP3
++#define K8_NOP8 K8_NOP4 K8_NOP4
++
++/* K7 nops */
++/* uses eax dependencies (arbitary choice) */
++#define K7_NOP1 GENERIC_NOP1
++#define K7_NOP2 ".byte 0x8b,0xc0\n"
++#define K7_NOP3 ".byte 0x8d,0x04,0x20\n"
++#define K7_NOP4 ".byte 0x8d,0x44,0x20,0x00\n"
++#define K7_NOP5 K7_NOP4 ASM_NOP1
++#define K7_NOP6 ".byte 0x8d,0x80,0,0,0,0\n"
++#define K7_NOP7 ".byte 0x8D,0x04,0x05,0,0,0,0\n"
++#define K7_NOP8 K7_NOP7 ASM_NOP1
++
++#ifdef CONFIG_MK8
++#define ASM_NOP1 K8_NOP1
++#define ASM_NOP2 K8_NOP2
++#define ASM_NOP3 K8_NOP3
++#define ASM_NOP4 K8_NOP4
++#define ASM_NOP5 K8_NOP5
++#define ASM_NOP6 K8_NOP6
++#define ASM_NOP7 K8_NOP7
++#define ASM_NOP8 K8_NOP8
++#elif defined(CONFIG_MK7)
++#define ASM_NOP1 K7_NOP1
++#define ASM_NOP2 K7_NOP2
++#define ASM_NOP3 K7_NOP3
++#define ASM_NOP4 K7_NOP4
++#define ASM_NOP5 K7_NOP5
++#define ASM_NOP6 K7_NOP6
++#define ASM_NOP7 K7_NOP7
++#define ASM_NOP8 K7_NOP8
++#else
++#define ASM_NOP1 GENERIC_NOP1
++#define ASM_NOP2 GENERIC_NOP2
++#define ASM_NOP3 GENERIC_NOP3
++#define ASM_NOP4 GENERIC_NOP4
++#define ASM_NOP5 GENERIC_NOP5
++#define ASM_NOP6 GENERIC_NOP6
++#define ASM_NOP7 GENERIC_NOP7
++#define ASM_NOP8 GENERIC_NOP8
++#endif
++
++#define ASM_NOP_MAX 8
++
++/* Prefetch instructions for Pentium III and AMD Athlon */
++/* It's not worth to care about 3dnow! prefetches for the K6
++ because they are microcoded there and very slow.
++ However we don't do prefetches for pre XP Athlons currently
++ That should be fixed. */
++#define ARCH_HAS_PREFETCH
++static inline void prefetch(const void *x)
++{
++ alternative_input(ASM_NOP4,
++ "prefetchnta (%1)",
++ X86_FEATURE_XMM,
++ "r" (x));
++}
++
++#define ARCH_HAS_PREFETCH
++#define ARCH_HAS_PREFETCHW
++#define ARCH_HAS_SPINLOCK_PREFETCH
++
++/* 3dnow! prefetch to get an exclusive cache line. Useful for
++ spinlocks to avoid one state transition in the cache coherency protocol. */
++static inline void prefetchw(const void *x)
++{
++ alternative_input(ASM_NOP4,
++ "prefetchw (%1)",
++ X86_FEATURE_3DNOW,
++ "r" (x));
++}
++#define spin_lock_prefetch(x) prefetchw(x)
++
++extern void select_idle_routine(const struct cpuinfo_x86 *c);
++
++#define cache_line_size() (boot_cpu_data.x86_cache_alignment)
++
++extern unsigned long boot_option_idle_override;
++extern void enable_sep_cpu(void);
++extern int sysenter_setup(void);
++
++#endif /* __ASM_I386_PROCESSOR_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/segment_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/segment_32.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,117 @@
++#ifndef _ASM_SEGMENT_H
++#define _ASM_SEGMENT_H
++
++/*
++ * The layout of the per-CPU GDT under Linux:
++ *
++ * 0 - null
++ * 1 - reserved
++ * 2 - reserved
++ * 3 - reserved
++ *
++ * 4 - unused <==== new cacheline
++ * 5 - unused
++ *
++ * ------- start of TLS (Thread-Local Storage) segments:
++ *
++ * 6 - TLS segment #1 [ glibc's TLS segment ]
++ * 7 - TLS segment #2 [ Wine's %fs Win32 segment ]
++ * 8 - TLS segment #3
++ * 9 - reserved
++ * 10 - reserved
++ * 11 - reserved
++ *
++ * ------- start of kernel segments:
++ *
++ * 12 - kernel code segment <==== new cacheline
++ * 13 - kernel data segment
++ * 14 - default user CS
++ * 15 - default user DS
++ * 16 - TSS
++ * 17 - LDT
++ * 18 - PNPBIOS support (16->32 gate)
++ * 19 - PNPBIOS support
++ * 20 - PNPBIOS support
++ * 21 - PNPBIOS support
++ * 22 - PNPBIOS support
++ * 23 - APM BIOS support
++ * 24 - APM BIOS support
++ * 25 - APM BIOS support
++ *
++ * 26 - ESPFIX small SS
++ * 27 - unused
++ * 28 - unused
++ * 29 - unused
++ * 30 - unused
++ * 31 - TSS for double fault handler
++ */
++#define GDT_ENTRY_TLS_ENTRIES 3
++#define GDT_ENTRY_TLS_MIN 6
++#define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
++
++#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
++
++#define GDT_ENTRY_DEFAULT_USER_CS 14
++#define __USER_CS (GDT_ENTRY_DEFAULT_USER_CS * 8 + 3)
++
++#define GDT_ENTRY_DEFAULT_USER_DS 15
++#define __USER_DS (GDT_ENTRY_DEFAULT_USER_DS * 8 + 3)
++
++#define GDT_ENTRY_KERNEL_BASE 12
++
++#define GDT_ENTRY_KERNEL_CS (GDT_ENTRY_KERNEL_BASE + 0)
++#define __KERNEL_CS (GDT_ENTRY_KERNEL_CS * 8)
++#define GET_KERNEL_CS() (__KERNEL_CS | (xen_feature(XENFEAT_supervisor_mode_kernel)?0:1) )
++
++#define GDT_ENTRY_KERNEL_DS (GDT_ENTRY_KERNEL_BASE + 1)
++#define __KERNEL_DS (GDT_ENTRY_KERNEL_DS * 8)
++#define GET_KERNEL_DS() (__KERNEL_DS | (xen_feature(XENFEAT_supervisor_mode_kernel)?0:1) )
++
++#define GDT_ENTRY_TSS (GDT_ENTRY_KERNEL_BASE + 4)
++#define GDT_ENTRY_LDT (GDT_ENTRY_KERNEL_BASE + 5)
++
++#define GDT_ENTRY_PNPBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 6)
++#define GDT_ENTRY_APMBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 11)
++
++#define GDT_ENTRY_ESPFIX_SS (GDT_ENTRY_KERNEL_BASE + 14)
++#define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8)
++
++#define GDT_ENTRY_DOUBLEFAULT_TSS 31
++
++/*
++ * The GDT has 32 entries
++ */
++#define GDT_ENTRIES 32
++
++#define GDT_SIZE (GDT_ENTRIES * 8)
++
++/* Simple and small GDT entries for booting only */
++
++#define GDT_ENTRY_BOOT_CS 2
++#define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
++
++#define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1)
++#define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
++
++/* The PnP BIOS entries in the GDT */
++#define GDT_ENTRY_PNPBIOS_CS32 (GDT_ENTRY_PNPBIOS_BASE + 0)
++#define GDT_ENTRY_PNPBIOS_CS16 (GDT_ENTRY_PNPBIOS_BASE + 1)
++#define GDT_ENTRY_PNPBIOS_DS (GDT_ENTRY_PNPBIOS_BASE + 2)
++#define GDT_ENTRY_PNPBIOS_TS1 (GDT_ENTRY_PNPBIOS_BASE + 3)
++#define GDT_ENTRY_PNPBIOS_TS2 (GDT_ENTRY_PNPBIOS_BASE + 4)
++
++/* The PnP BIOS selectors */
++#define PNP_CS32 (GDT_ENTRY_PNPBIOS_CS32 * 8) /* segment for calling fn */
++#define PNP_CS16 (GDT_ENTRY_PNPBIOS_CS16 * 8) /* code segment for BIOS */
++#define PNP_DS (GDT_ENTRY_PNPBIOS_DS * 8) /* data segment for BIOS */
++#define PNP_TS1 (GDT_ENTRY_PNPBIOS_TS1 * 8) /* transfer data segment */
++#define PNP_TS2 (GDT_ENTRY_PNPBIOS_TS2 * 8) /* another data segment */
++
++/*
++ * The interrupt descriptor table has room for 256 idt's,
++ * the global descriptor table is dependent on the number
++ * of tasks we can have..
++ */
++#define IDT_ENTRIES 256
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/smp_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/smp_32.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,103 @@
++#ifndef __ASM_SMP_H
++#define __ASM_SMP_H
++
++/*
++ * We need the APIC definitions automatically as part of 'smp.h'
++ */
++#ifndef __ASSEMBLY__
++#include <linux/kernel.h>
++#include <linux/threads.h>
++#include <linux/cpumask.h>
++#endif
++
++#ifdef CONFIG_X86_LOCAL_APIC
++#ifndef __ASSEMBLY__
++#include <asm/fixmap.h>
++#include <asm/bitops.h>
++#include <asm/mpspec.h>
++#ifdef CONFIG_X86_IO_APIC
++#include <asm/io_apic.h>
++#endif
++#include <asm/apic.h>
++#endif
++#endif
++
++#define BAD_APICID 0xFFu
++#ifdef CONFIG_SMP
++#ifndef __ASSEMBLY__
++
++/*
++ * Private routines/data
++ */
++
++extern void smp_alloc_memory(void);
++extern int pic_mode;
++extern int smp_num_siblings;
++extern cpumask_t cpu_sibling_map[];
++extern cpumask_t cpu_core_map[];
++
++extern void (*mtrr_hook) (void);
++extern void zap_low_mappings (void);
++extern void lock_ipi_call_lock(void);
++extern void unlock_ipi_call_lock(void);
++
++#define MAX_APICID 256
++extern u8 x86_cpu_to_apicid[];
++
++#define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
++
++#ifdef CONFIG_HOTPLUG_CPU
++extern void cpu_exit_clear(void);
++extern void cpu_uninit(void);
++#endif
++
++/*
++ * This function is needed by all SMP systems. It must _always_ be valid
++ * from the initial startup. We map APIC_BASE very early in page_setup(),
++ * so this is correct in the x86 case.
++ */
++#define raw_smp_processor_id() (current_thread_info()->cpu)
++
++extern cpumask_t cpu_possible_map;
++#define cpu_callin_map cpu_possible_map
++
++/* We don't mark CPUs online until __cpu_up(), so we need another measure */
++static inline int num_booting_cpus(void)
++{
++ return cpus_weight(cpu_possible_map);
++}
++
++#ifdef CONFIG_X86_LOCAL_APIC
++
++#ifdef APIC_DEFINITION
++extern int hard_smp_processor_id(void);
++#else
++#include <mach_apicdef.h>
++static inline int hard_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
++}
++#endif
++
++static __inline int logical_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
++}
++
++#endif
++
++extern int __cpu_disable(void);
++extern void __cpu_die(unsigned int cpu);
++extern void prefill_possible_map(void);
++#endif /* !__ASSEMBLY__ */
++
++#else /* CONFIG_SMP */
++
++#define cpu_physical_id(cpu) boot_cpu_physical_apicid
++
++#define NO_PROC_ID 0xFF /* No processor magic marker */
++
++#endif
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/swiotlb_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/swiotlb_32.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,43 @@
++#ifndef _ASM_SWIOTLB_H
++#define _ASM_SWIOTLB_H 1
++
++/* SWIOTLB interface */
++
++extern dma_addr_t swiotlb_map_single(struct device *hwdev, void *ptr, size_t size,
++ int dir);
++extern void swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
++ size_t size, int dir);
++extern void swiotlb_sync_single_for_cpu(struct device *hwdev,
++ dma_addr_t dev_addr,
++ size_t size, int dir);
++extern void swiotlb_sync_single_for_device(struct device *hwdev,
++ dma_addr_t dev_addr,
++ size_t size, int dir);
++extern void swiotlb_sync_sg_for_cpu(struct device *hwdev,
++ struct scatterlist *sg, int nelems,
++ int dir);
++extern void swiotlb_sync_sg_for_device(struct device *hwdev,
++ struct scatterlist *sg, int nelems,
++ int dir);
++extern int swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg,
++ int nents, int direction);
++extern void swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg,
++ int nents, int direction);
++extern int swiotlb_dma_mapping_error(dma_addr_t dma_addr);
++#ifdef CONFIG_HIGHMEM
++extern dma_addr_t swiotlb_map_page(struct device *hwdev, struct page *page,
++ unsigned long offset, size_t size,
++ enum dma_data_direction direction);
++extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dma_address,
++ size_t size, enum dma_data_direction direction);
++#endif
++extern int swiotlb_dma_supported(struct device *hwdev, u64 mask);
++extern void swiotlb_init(void);
++
++#ifdef CONFIG_SWIOTLB
++extern int swiotlb;
++#else
++#define swiotlb 0
++#endif
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/synch_bitops.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/synch_bitops.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,126 @@
++#ifndef __XEN_SYNCH_BITOPS_H__
++#define __XEN_SYNCH_BITOPS_H__
++
++/*
++ * Copyright 1992, Linus Torvalds.
++ * Heavily modified to provide guaranteed strong synchronisation
++ * when communicating with Xen or other guest OSes running on other CPUs.
++ */
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++#define ADDR (*(volatile long *) addr)
++
++static __inline__ void synch_set_bit(int nr, volatile void * addr)
++{
++ __asm__ __volatile__ (
++ "lock btsl %1,%0"
++ : "+m" (ADDR) : "Ir" (nr) : "memory" );
++}
++
++static __inline__ void synch_clear_bit(int nr, volatile void * addr)
++{
++ __asm__ __volatile__ (
++ "lock btrl %1,%0"
++ : "+m" (ADDR) : "Ir" (nr) : "memory" );
++}
++
++static __inline__ void synch_change_bit(int nr, volatile void * addr)
++{
++ __asm__ __volatile__ (
++ "lock btcl %1,%0"
++ : "+m" (ADDR) : "Ir" (nr) : "memory" );
++}
++
++static __inline__ int synch_test_and_set_bit(int nr, volatile void * addr)
++{
++ int oldbit;
++ __asm__ __volatile__ (
++ "lock btsl %2,%1\n\tsbbl %0,%0"
++ : "=r" (oldbit), "+m" (ADDR) : "Ir" (nr) : "memory");
++ return oldbit;
++}
++
++static __inline__ int synch_test_and_clear_bit(int nr, volatile void * addr)
++{
++ int oldbit;
++ __asm__ __volatile__ (
++ "lock btrl %2,%1\n\tsbbl %0,%0"
++ : "=r" (oldbit), "+m" (ADDR) : "Ir" (nr) : "memory");
++ return oldbit;
++}
++
++static __inline__ int synch_test_and_change_bit(int nr, volatile void * addr)
++{
++ int oldbit;
++
++ __asm__ __volatile__ (
++ "lock btcl %2,%1\n\tsbbl %0,%0"
++ : "=r" (oldbit), "+m" (ADDR) : "Ir" (nr) : "memory");
++ return oldbit;
++}
++
++struct __synch_xchg_dummy { unsigned long a[100]; };
++#define __synch_xg(x) ((struct __synch_xchg_dummy *)(x))
++
++#define synch_cmpxchg(ptr, old, new) \
++((__typeof__(*(ptr)))__synch_cmpxchg((ptr),\
++ (unsigned long)(old), \
++ (unsigned long)(new), \
++ sizeof(*(ptr))))
++
++static inline unsigned long __synch_cmpxchg(volatile void *ptr,
++ unsigned long old,
++ unsigned long new, int size)
++{
++ unsigned long prev;
++ switch (size) {
++ case 1:
++ __asm__ __volatile__("lock; cmpxchgb %b1,%2"
++ : "=a"(prev)
++ : "q"(new), "m"(*__synch_xg(ptr)),
++ "0"(old)
++ : "memory");
++ return prev;
++ case 2:
++ __asm__ __volatile__("lock; cmpxchgw %w1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__synch_xg(ptr)),
++ "0"(old)
++ : "memory");
++ return prev;
++#ifdef CONFIG_X86_64
++ case 4:
++ __asm__ __volatile__("lock; cmpxchgl %k1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__synch_xg(ptr)),
++ "0"(old)
++ : "memory");
++ return prev;
++ case 8:
++ __asm__ __volatile__("lock; cmpxchgq %1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__synch_xg(ptr)),
++ "0"(old)
++ : "memory");
++ return prev;
++#else
++ case 4:
++ __asm__ __volatile__("lock; cmpxchgl %1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__synch_xg(ptr)),
++ "0"(old)
++ : "memory");
++ return prev;
++#endif
++ }
++ return old;
++}
++
++#define synch_test_bit test_bit
++
++#define synch_cmpxchg_subword synch_cmpxchg
++
++#endif /* __XEN_SYNCH_BITOPS_H__ */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/system_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/system_32.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,488 @@
++#ifndef __ASM_SYSTEM_H
++#define __ASM_SYSTEM_H
++
++#include <linux/kernel.h>
++#include <asm/segment.h>
++#include <asm/cpufeature.h>
++#include <linux/bitops.h> /* for LOCK_PREFIX */
++#include <asm/synch_bitops.h>
++#include <asm/hypervisor.h>
++
++#ifdef __KERNEL__
++
++struct task_struct; /* one of the stranger aspects of C forward declarations.. */
++extern struct task_struct * FASTCALL(__switch_to(struct task_struct *prev, struct task_struct *next));
++
++/*
++ * Saving eflags is important. It switches not only IOPL between tasks,
++ * it also protects other tasks from NT leaking through sysenter etc.
++ */
++#define switch_to(prev,next,last) do { \
++ unsigned long esi,edi; \
++ asm volatile("pushfl\n\t" /* Save flags */ \
++ "pushl %%ebp\n\t" \
++ "movl %%esp,%0\n\t" /* save ESP */ \
++ "movl %5,%%esp\n\t" /* restore ESP */ \
++ "movl $1f,%1\n\t" /* save EIP */ \
++ "pushl %6\n\t" /* restore EIP */ \
++ "jmp __switch_to\n" \
++ "1:\t" \
++ "popl %%ebp\n\t" \
++ "popfl" \
++ :"=m" (prev->thread.esp),"=m" (prev->thread.eip), \
++ "=a" (last),"=S" (esi),"=D" (edi) \
++ :"m" (next->thread.esp),"m" (next->thread.eip), \
++ "2" (prev), "d" (next)); \
++} while (0)
++
++#define _set_base(addr,base) do { unsigned long __pr; \
++__asm__ __volatile__ ("movw %%dx,%1\n\t" \
++ "rorl $16,%%edx\n\t" \
++ "movb %%dl,%2\n\t" \
++ "movb %%dh,%3" \
++ :"=&d" (__pr) \
++ :"m" (*((addr)+2)), \
++ "m" (*((addr)+4)), \
++ "m" (*((addr)+7)), \
++ "0" (base) \
++ ); } while(0)
++
++#define _set_limit(addr,limit) do { unsigned long __lr; \
++__asm__ __volatile__ ("movw %%dx,%1\n\t" \
++ "rorl $16,%%edx\n\t" \
++ "movb %2,%%dh\n\t" \
++ "andb $0xf0,%%dh\n\t" \
++ "orb %%dh,%%dl\n\t" \
++ "movb %%dl,%2" \
++ :"=&d" (__lr) \
++ :"m" (*(addr)), \
++ "m" (*((addr)+6)), \
++ "0" (limit) \
++ ); } while(0)
++
++#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , (base) )
++#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , ((limit)-1) )
++
++/*
++ * Load a segment. Fall back on loading the zero
++ * segment if something goes wrong..
++ */
++#define loadsegment(seg,value) \
++ asm volatile("\n" \
++ "1:\t" \
++ "mov %0,%%" #seg "\n" \
++ "2:\n" \
++ ".section .fixup,\"ax\"\n" \
++ "3:\t" \
++ "pushl $0\n\t" \
++ "popl %%" #seg "\n\t" \
++ "jmp 2b\n" \
++ ".previous\n" \
++ ".section __ex_table,\"a\"\n\t" \
++ ".align 4\n\t" \
++ ".long 1b,3b\n" \
++ ".previous" \
++ : :"rm" (value))
++
++/*
++ * Save a segment register away
++ */
++#define savesegment(seg, value) \
++ asm volatile("mov %%" #seg ",%0":"=rm" (value))
++
++#define read_cr0() ({ \
++ unsigned int __dummy; \
++ __asm__ __volatile__( \
++ "movl %%cr0,%0\n\t" \
++ :"=r" (__dummy)); \
++ __dummy; \
++})
++#define write_cr0(x) \
++ __asm__ __volatile__("movl %0,%%cr0": :"r" (x))
++
++#define read_cr2() (current_vcpu_info()->arch.cr2)
++#define write_cr2(x) \
++ __asm__ __volatile__("movl %0,%%cr2": :"r" (x))
++
++#define read_cr3() ({ \
++ unsigned int __dummy; \
++ __asm__ ( \
++ "movl %%cr3,%0\n\t" \
++ :"=r" (__dummy)); \
++ __dummy = xen_cr3_to_pfn(__dummy); \
++ mfn_to_pfn(__dummy) << PAGE_SHIFT; \
++})
++#define write_cr3(x) ({ \
++ unsigned int __dummy = pfn_to_mfn((x) >> PAGE_SHIFT); \
++ __dummy = xen_pfn_to_cr3(__dummy); \
++ __asm__ __volatile__("movl %0,%%cr3": :"r" (__dummy)); \
++})
++#define read_cr4() ({ \
++ unsigned int __dummy; \
++ __asm__( \
++ "movl %%cr4,%0\n\t" \
++ :"=r" (__dummy)); \
++ __dummy; \
++})
++#define read_cr4_safe() ({ \
++ unsigned int __dummy; \
++ /* This could fault if %cr4 does not exist */ \
++ __asm__("1: movl %%cr4, %0 \n" \
++ "2: \n" \
++ ".section __ex_table,\"a\" \n" \
++ ".long 1b,2b \n" \
++ ".previous \n" \
++ : "=r" (__dummy): "0" (0)); \
++ __dummy; \
++})
++
++#define write_cr4(x) \
++ __asm__ __volatile__("movl %0,%%cr4": :"r" (x))
++
++/*
++ * Clear and set 'TS' bit respectively
++ */
++#define clts() (HYPERVISOR_fpu_taskswitch(0))
++#define stts() (HYPERVISOR_fpu_taskswitch(1))
++
++#endif /* __KERNEL__ */
++
++#define wbinvd() \
++ __asm__ __volatile__ ("wbinvd": : :"memory")
++
++static inline unsigned long get_limit(unsigned long segment)
++{
++ unsigned long __limit;
++ __asm__("lsll %1,%0"
++ :"=r" (__limit):"r" (segment));
++ return __limit+1;
++}
++
++#define nop() __asm__ __volatile__ ("nop")
++
++#define xchg(ptr,v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr))))
++
++#define tas(ptr) (xchg((ptr),1))
++
++struct __xchg_dummy { unsigned long a[100]; };
++#define __xg(x) ((struct __xchg_dummy *)(x))
++
++
++#ifdef CONFIG_X86_CMPXCHG64
++
++/*
++ * The semantics of XCHGCMP8B are a bit strange, this is why
++ * there is a loop and the loading of %%eax and %%edx has to
++ * be inside. This inlines well in most cases, the cached
++ * cost is around ~38 cycles. (in the future we might want
++ * to do an SIMD/3DNOW!/MMX/FPU 64-bit store here, but that
++ * might have an implicit FPU-save as a cost, so it's not
++ * clear which path to go.)
++ *
++ * cmpxchg8b must be used with the lock prefix here to allow
++ * the instruction to be executed atomically, see page 3-102
++ * of the instruction set reference 24319102.pdf. We need
++ * the reader side to see the coherent 64bit value.
++ */
++static inline void __set_64bit (unsigned long long * ptr,
++ unsigned int low, unsigned int high)
++{
++ __asm__ __volatile__ (
++ "\n1:\t"
++ "movl (%0), %%eax\n\t"
++ "movl 4(%0), %%edx\n\t"
++ "lock cmpxchg8b (%0)\n\t"
++ "jnz 1b"
++ : /* no outputs */
++ : "D"(ptr),
++ "b"(low),
++ "c"(high)
++ : "ax","dx","memory");
++}
++
++static inline void __set_64bit_constant (unsigned long long *ptr,
++ unsigned long long value)
++{
++ __set_64bit(ptr,(unsigned int)(value), (unsigned int)((value)>>32ULL));
++}
++#define ll_low(x) *(((unsigned int*)&(x))+0)
++#define ll_high(x) *(((unsigned int*)&(x))+1)
++
++static inline void __set_64bit_var (unsigned long long *ptr,
++ unsigned long long value)
++{
++ __set_64bit(ptr,ll_low(value), ll_high(value));
++}
++
++#define set_64bit(ptr,value) \
++(__builtin_constant_p(value) ? \
++ __set_64bit_constant(ptr, value) : \
++ __set_64bit_var(ptr, value) )
++
++#define _set_64bit(ptr,value) \
++(__builtin_constant_p(value) ? \
++ __set_64bit(ptr, (unsigned int)(value), (unsigned int)((value)>>32ULL) ) : \
++ __set_64bit(ptr, ll_low(value), ll_high(value)) )
++
++#endif
++
++/*
++ * Note: no "lock" prefix even on SMP: xchg always implies lock anyway
++ * Note 2: xchg has side effect, so that attribute volatile is necessary,
++ * but generally the primitive is invalid, *ptr is output argument. --ANK
++ */
++static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
++{
++ switch (size) {
++ case 1:
++ __asm__ __volatile__("xchgb %b0,%1"
++ :"=q" (x)
++ :"m" (*__xg(ptr)), "0" (x)
++ :"memory");
++ break;
++ case 2:
++ __asm__ __volatile__("xchgw %w0,%1"
++ :"=r" (x)
++ :"m" (*__xg(ptr)), "0" (x)
++ :"memory");
++ break;
++ case 4:
++ __asm__ __volatile__("xchgl %0,%1"
++ :"=r" (x)
++ :"m" (*__xg(ptr)), "0" (x)
++ :"memory");
++ break;
++ }
++ return x;
++}
++
++/*
++ * Atomic compare and exchange. Compare OLD with MEM, if identical,
++ * store NEW in MEM. Return the initial value in MEM. Success is
++ * indicated by comparing RETURN with OLD.
++ */
++
++#ifdef CONFIG_X86_CMPXCHG
++#define __HAVE_ARCH_CMPXCHG 1
++#define cmpxchg(ptr,o,n)\
++ ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
++ (unsigned long)(n),sizeof(*(ptr))))
++#endif
++
++static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
++ unsigned long new, int size)
++{
++ unsigned long prev;
++ switch (size) {
++ case 1:
++ __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
++ : "=a"(prev)
++ : "q"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ case 2:
++ __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ case 4:
++ __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ }
++ return old;
++}
++
++#ifndef CONFIG_X86_CMPXCHG
++/*
++ * Building a kernel capable running on 80386. It may be necessary to
++ * simulate the cmpxchg on the 80386 CPU. For that purpose we define
++ * a function for each of the sizes we support.
++ */
++
++extern unsigned long cmpxchg_386_u8(volatile void *, u8, u8);
++extern unsigned long cmpxchg_386_u16(volatile void *, u16, u16);
++extern unsigned long cmpxchg_386_u32(volatile void *, u32, u32);
++
++static inline unsigned long cmpxchg_386(volatile void *ptr, unsigned long old,
++ unsigned long new, int size)
++{
++ switch (size) {
++ case 1:
++ return cmpxchg_386_u8(ptr, old, new);
++ case 2:
++ return cmpxchg_386_u16(ptr, old, new);
++ case 4:
++ return cmpxchg_386_u32(ptr, old, new);
++ }
++ return old;
++}
++
++#define cmpxchg(ptr,o,n) \
++({ \
++ __typeof__(*(ptr)) __ret; \
++ if (likely(boot_cpu_data.x86 > 3)) \
++ __ret = __cmpxchg((ptr), (unsigned long)(o), \
++ (unsigned long)(n), sizeof(*(ptr))); \
++ else \
++ __ret = cmpxchg_386((ptr), (unsigned long)(o), \
++ (unsigned long)(n), sizeof(*(ptr))); \
++ __ret; \
++})
++#endif
++
++#ifdef CONFIG_X86_CMPXCHG64
++
++static inline unsigned long long __cmpxchg64(volatile void *ptr, unsigned long long old,
++ unsigned long long new)
++{
++ unsigned long long prev;
++ __asm__ __volatile__(LOCK_PREFIX "cmpxchg8b %3"
++ : "=A"(prev)
++ : "b"((unsigned long)new),
++ "c"((unsigned long)(new >> 32)),
++ "m"(*__xg(ptr)),
++ "0"(old)
++ : "memory");
++ return prev;
++}
++
++#define cmpxchg64(ptr,o,n)\
++ ((__typeof__(*(ptr)))__cmpxchg64((ptr),(unsigned long long)(o),\
++ (unsigned long long)(n)))
++
++#endif
++
++/*
++ * Force strict CPU ordering.
++ * And yes, this is required on UP too when we're talking
++ * to devices.
++ *
++ * For now, "wmb()" doesn't actually do anything, as all
++ * Intel CPU's follow what Intel calls a *Processor Order*,
++ * in which all writes are seen in the program order even
++ * outside the CPU.
++ *
++ * I expect future Intel CPU's to have a weaker ordering,
++ * but I'd also expect them to finally get their act together
++ * and add some real memory barriers if so.
++ *
++ * Some non intel clones support out of order store. wmb() ceases to be a
++ * nop for these.
++ */
++
++
++/*
++ * Actually only lfence would be needed for mb() because all stores done
++ * by the kernel should be already ordered. But keep a full barrier for now.
++ */
++
++#define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
++#define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
++
++/**
++ * read_barrier_depends - Flush all pending reads that subsequents reads
++ * depend on.
++ *
++ * No data-dependent reads from memory-like regions are ever reordered
++ * over this barrier. All reads preceding this primitive are guaranteed
++ * to access memory (but not necessarily other CPUs' caches) before any
++ * reads following this primitive that depend on the data return by
++ * any of the preceding reads. This primitive is much lighter weight than
++ * rmb() on most CPUs, and is never heavier weight than is
++ * rmb().
++ *
++ * These ordering constraints are respected by both the local CPU
++ * and the compiler.
++ *
++ * Ordering is not guaranteed by anything other than these primitives,
++ * not even by data dependencies. See the documentation for
++ * memory_barrier() for examples and URLs to more information.
++ *
++ * For example, the following code would force ordering (the initial
++ * value of "a" is zero, "b" is one, and "p" is "&a"):
++ *
++ * <programlisting>
++ * CPU 0 CPU 1
++ *
++ * b = 2;
++ * memory_barrier();
++ * p = &b; q = p;
++ * read_barrier_depends();
++ * d = *q;
++ * </programlisting>
++ *
++ * because the read of "*q" depends on the read of "p" and these
++ * two reads are separated by a read_barrier_depends(). However,
++ * the following code, with the same initial values for "a" and "b":
++ *
++ * <programlisting>
++ * CPU 0 CPU 1
++ *
++ * a = 2;
++ * memory_barrier();
++ * b = 3; y = b;
++ * read_barrier_depends();
++ * x = a;
++ * </programlisting>
++ *
++ * does not enforce ordering, since there is no data dependency between
++ * the read of "a" and the read of "b". Therefore, on some CPUs, such
++ * as Alpha, "y" could be set to 3 and "x" to 0. Use rmb()
++ * in cases like this where there are no data dependencies.
++ **/
++
++#define read_barrier_depends() do { } while(0)
++
++#ifdef CONFIG_X86_OOSTORE
++/* Actually there are no OOO store capable CPUs for now that do SSE,
++ but make it already an possibility. */
++#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM)
++#else
++#define wmb() __asm__ __volatile__ ("": : :"memory")
++#endif
++
++#ifdef CONFIG_SMP
++#define smp_mb() mb()
++#define smp_rmb() rmb()
++#define smp_wmb() wmb()
++#define smp_read_barrier_depends() read_barrier_depends()
++#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
++#else
++#define smp_mb() barrier()
++#define smp_rmb() barrier()
++#define smp_wmb() barrier()
++#define smp_read_barrier_depends() do { } while(0)
++#define set_mb(var, value) do { var = value; barrier(); } while (0)
++#endif
++
++#include <linux/irqflags.h>
++
++/*
++ * disable hlt during certain critical i/o operations
++ */
++#define HAVE_DISABLE_HLT
++void disable_hlt(void);
++void enable_hlt(void);
++
++extern int es7000_plat;
++void cpu_idle_wait(void);
++
++/*
++ * On SMP systems, when the scheduler does migration-cost autodetection,
++ * it needs a way to flush as much of the CPU's caches as possible:
++ */
++static inline void sched_cacheflush(void)
++{
++ wbinvd();
++}
++
++extern unsigned long arch_align_stack(unsigned long sp);
++extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
++
++void default_idle(void);
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/tlbflush_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/tlbflush_32.h 2007-11-26 16:59:25.000000000 +0100
+@@ -0,0 +1,101 @@
++#ifndef _I386_TLBFLUSH_H
++#define _I386_TLBFLUSH_H
++
++#include <linux/mm.h>
++#include <asm/processor.h>
++
++#define __flush_tlb() xen_tlb_flush()
++#define __flush_tlb_global() xen_tlb_flush()
++#define __flush_tlb_all() xen_tlb_flush()
++
++extern unsigned long pgkern_mask;
++
++#define cpu_has_invlpg (boot_cpu_data.x86 > 3)
++
++#define __flush_tlb_single(addr) xen_invlpg(addr)
++
++#define __flush_tlb_one(addr) __flush_tlb_single(addr)
++
++/*
++ * TLB flushing:
++ *
++ * - flush_tlb() flushes the current mm struct TLBs
++ * - flush_tlb_all() flushes all processes TLBs
++ * - flush_tlb_mm(mm) flushes the specified mm context TLB's
++ * - flush_tlb_page(vma, vmaddr) flushes one page
++ * - flush_tlb_range(vma, start, end) flushes a range of pages
++ * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
++ * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
++ *
++ * ..but the i386 has somewhat limited tlb flushing capabilities,
++ * and page-granular flushes are available only on i486 and up.
++ */
++
++#ifndef CONFIG_SMP
++
++#define flush_tlb() __flush_tlb()
++#define flush_tlb_all() __flush_tlb_all()
++#define local_flush_tlb() __flush_tlb()
++
++static inline void flush_tlb_mm(struct mm_struct *mm)
++{
++ if (mm == current->active_mm)
++ __flush_tlb();
++}
++
++static inline void flush_tlb_page(struct vm_area_struct *vma,
++ unsigned long addr)
++{
++ if (vma->vm_mm == current->active_mm)
++ __flush_tlb_one(addr);
++}
++
++static inline void flush_tlb_range(struct vm_area_struct *vma,
++ unsigned long start, unsigned long end)
++{
++ if (vma->vm_mm == current->active_mm)
++ __flush_tlb();
++}
++
++#else
++
++#include <asm/smp.h>
++
++#define local_flush_tlb() \
++ __flush_tlb()
++
++#define flush_tlb_all xen_tlb_flush_all
++#define flush_tlb_current_task() xen_tlb_flush_mask(¤t->mm->cpu_vm_mask)
++#define flush_tlb_mm(mm) xen_tlb_flush_mask(&(mm)->cpu_vm_mask)
++#define flush_tlb_page(vma, va) xen_invlpg_mask(&(vma)->vm_mm->cpu_vm_mask, va)
++
++#define flush_tlb() flush_tlb_current_task()
++
++static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
++{
++ flush_tlb_mm(vma->vm_mm);
++}
++
++#define TLBSTATE_OK 1
++#define TLBSTATE_LAZY 2
++
++struct tlb_state
++{
++ struct mm_struct *active_mm;
++ int state;
++ char __cacheline_padding[L1_CACHE_BYTES-8];
++};
++DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
++
++
++#endif
++
++#define flush_tlb_kernel_range(start, end) flush_tlb_all()
++
++static inline void flush_tlb_pgtables(struct mm_struct *mm,
++ unsigned long start, unsigned long end)
++{
++ /* i386 does not keep any page table caches in TLB */
++}
++
++#endif /* _I386_TLBFLUSH_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/vga.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/vga.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,20 @@
++/*
++ * Access to VGA videoram
++ *
++ * (c) 1998 Martin Mares <mj@ucw.cz>
++ */
++
++#ifndef _LINUX_ASM_VGA_H_
++#define _LINUX_ASM_VGA_H_
++
++/*
++ * On the PC, we can just recalculate addresses and then
++ * access the videoram directly without any black magic.
++ */
++
++#define VGA_MAP_MEM(x,s) (unsigned long)isa_bus_to_virt(x)
++
++#define vga_readb(x) (*(x))
++#define vga_writeb(x,y) (*(y) = (x))
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/xenoprof.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/xenoprof.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,48 @@
++/******************************************************************************
++ * asm-i386/mach-xen/asm/xenoprof.h
++ *
++ * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
++ * VA Linux Systems Japan K.K.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ */
++#ifndef __ASM_XENOPROF_H__
++#define __ASM_XENOPROF_H__
++#ifdef CONFIG_XEN
++
++struct super_block;
++struct dentry;
++int xenoprof_create_files(struct super_block * sb, struct dentry * root);
++#define HAVE_XENOPROF_CREATE_FILES
++
++struct xenoprof_init;
++void xenoprof_arch_init_counter(struct xenoprof_init *init);
++void xenoprof_arch_counter(void);
++void xenoprof_arch_start(void);
++void xenoprof_arch_stop(void);
++
++struct xenoprof_arch_shared_buffer {
++ /* nothing */
++};
++struct xenoprof_shared_buffer;
++void xenoprof_arch_unmap_shared_buffer(struct xenoprof_shared_buffer* sbuf);
++struct xenoprof_get_buffer;
++int xenoprof_arch_map_shared_buffer(struct xenoprof_get_buffer* get_buffer, struct xenoprof_shared_buffer* sbuf);
++struct xenoprof_passive;
++int xenoprof_arch_set_passive(struct xenoprof_passive* pdomain, struct xenoprof_shared_buffer* sbuf);
++
++#endif /* CONFIG_XEN */
++#endif /* __ASM_XENOPROF_H__ */
+Index: head-2008-11-25/include/asm-x86/mach-xen/irq_vectors.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/irq_vectors.h 2008-09-25 13:55:32.000000000 +0200
+@@ -0,0 +1,125 @@
++/*
++ * This file should contain #defines for all of the interrupt vector
++ * numbers used by this architecture.
++ *
++ * In addition, there are some standard defines:
++ *
++ * FIRST_EXTERNAL_VECTOR:
++ * The first free place for external interrupts
++ *
++ * SYSCALL_VECTOR:
++ * The IRQ vector a syscall makes the user to kernel transition
++ * under.
++ *
++ * TIMER_IRQ:
++ * The IRQ number the timer interrupt comes in at.
++ *
++ * NR_IRQS:
++ * The total number of interrupt vectors (including all the
++ * architecture specific interrupts) needed.
++ *
++ */
++#ifndef _ASM_IRQ_VECTORS_H
++#define _ASM_IRQ_VECTORS_H
++
++/*
++ * IDT vectors usable for external interrupt sources start
++ * at 0x20:
++ */
++#define FIRST_EXTERNAL_VECTOR 0x20
++
++#define SYSCALL_VECTOR 0x80
++
++/*
++ * Vectors 0x20-0x2f are used for ISA interrupts.
++ */
++
++#if 0
++/*
++ * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
++ *
++ * some of the following vectors are 'rare', they are merged
++ * into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
++ * TLB, reschedule and local APIC vectors are performance-critical.
++ *
++ * Vectors 0xf0-0xfa are free (reserved for future Linux use).
++ */
++#define SPURIOUS_APIC_VECTOR 0xff
++#define ERROR_APIC_VECTOR 0xfe
++#define INVALIDATE_TLB_VECTOR 0xfd
++#define RESCHEDULE_VECTOR 0xfc
++#define CALL_FUNCTION_VECTOR 0xfb
++
++#define THERMAL_APIC_VECTOR 0xf0
++/*
++ * Local APIC timer IRQ vector is on a different priority level,
++ * to work around the 'lost local interrupt if more than 2 IRQ
++ * sources per level' errata.
++ */
++#define LOCAL_TIMER_VECTOR 0xef
++#endif
++
++#define SPURIOUS_APIC_VECTOR 0xff
++#define ERROR_APIC_VECTOR 0xfe
++
++/*
++ * First APIC vector available to drivers: (vectors 0x30-0xee)
++ * we start at 0x31 to spread out vectors evenly between priority
++ * levels. (0x80 is the syscall vector)
++ */
++#define FIRST_DEVICE_VECTOR 0x31
++#define FIRST_SYSTEM_VECTOR 0xef
++
++/*
++ * 16 8259A IRQ's, 208 potential APIC interrupt sources.
++ * Right now the APIC is mostly only used for SMP.
++ * 256 vectors is an architectural limit. (we can have
++ * more than 256 devices theoretically, but they will
++ * have to use shared interrupts)
++ * Since vectors 0x00-0x1f are used/reserved for the CPU,
++ * the usable vector space is 0x20-0xff (224 vectors)
++ */
++
++#define RESCHEDULE_VECTOR 0
++#define CALL_FUNCTION_VECTOR 1
++#define NR_IPIS 2
++
++/*
++ * The maximum number of vectors supported by i386 processors
++ * is limited to 256. For processors other than i386, NR_VECTORS
++ * should be changed accordingly.
++ */
++#define NR_VECTORS 256
++
++#define FPU_IRQ 13
++
++#define FIRST_VM86_IRQ 3
++#define LAST_VM86_IRQ 15
++#define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15)
++
++/*
++ * The flat IRQ space is divided into two regions:
++ * 1. A one-to-one mapping of real physical IRQs. This space is only used
++ * if we have physical device-access privilege. This region is at the
++ * start of the IRQ space so that existing device drivers do not need
++ * to be modified to translate physical IRQ numbers into our IRQ space.
++ * 3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These
++ * are bound using the provided bind/unbind functions.
++ */
++
++#define PIRQ_BASE 0
++#if !defined(MAX_IO_APICS)
++# define NR_PIRQS (NR_VECTORS + 32 * NR_CPUS)
++#elif NR_CPUS < MAX_IO_APICS
++# define NR_PIRQS (NR_VECTORS + 32 * NR_CPUS)
++#else
++# define NR_PIRQS (NR_VECTORS + 32 * MAX_IO_APICS)
++#endif
++
++#define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS)
++#define NR_DYNIRQS 256
++
++#define NR_IRQS (NR_PIRQS + NR_DYNIRQS)
++#define NR_IRQ_VECTORS NR_IRQS
++
++#endif /* _ASM_IRQ_VECTORS_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/mach_traps.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/mach_traps.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,33 @@
++/*
++ * include/asm-xen/asm-i386/mach-xen/mach_traps.h
++ *
++ * Machine specific NMI handling for Xen
++ */
++#ifndef _MACH_TRAPS_H
++#define _MACH_TRAPS_H
++
++#include <linux/bitops.h>
++#include <xen/interface/nmi.h>
++
++static inline void clear_mem_error(unsigned char reason) {}
++static inline void clear_io_check_error(unsigned char reason) {}
++
++static inline unsigned char get_nmi_reason(void)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++ unsigned char reason = 0;
++
++ /* construct a value which looks like it came from
++ * port 0x61.
++ */
++ if (test_bit(_XEN_NMIREASON_io_error, &s->arch.nmi_reason))
++ reason |= 0x40;
++ if (test_bit(_XEN_NMIREASON_parity_error, &s->arch.nmi_reason))
++ reason |= 0x80;
++
++ return reason;
++}
++
++static inline void reassert_nmi(void) {}
++
++#endif /* !_MACH_TRAPS_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/setup_arch.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/setup_arch.h 2007-06-12 13:14:02.000000000 +0200
+@@ -0,0 +1,5 @@
++/* Hook to call BIOS initialisation function */
++
++#define ARCH_SETUP machine_specific_arch_setup();
++
++void __init machine_specific_arch_setup(void);
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/desc_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/desc_64.h 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,265 @@
++/* Written 2000 by Andi Kleen */
++#ifndef __ARCH_DESC_H
++#define __ARCH_DESC_H
++
++#include <linux/threads.h>
++#include <asm/ldt.h>
++
++#ifndef __ASSEMBLY__
++
++#include <linux/string.h>
++#include <linux/smp.h>
++
++#include <asm/segment.h>
++#include <asm/mmu.h>
++
++// 8 byte segment descriptor
++struct desc_struct {
++ u16 limit0;
++ u16 base0;
++ unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
++ unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
++} __attribute__((packed));
++
++struct n_desc_struct {
++ unsigned int a,b;
++};
++
++enum {
++ GATE_INTERRUPT = 0xE,
++ GATE_TRAP = 0xF,
++ GATE_CALL = 0xC,
++};
++
++// 16byte gate
++struct gate_struct {
++ u16 offset_low;
++ u16 segment;
++ unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
++ u16 offset_middle;
++ u32 offset_high;
++ u32 zero1;
++} __attribute__((packed));
++
++#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
++#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
++#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
++
++enum {
++ DESC_TSS = 0x9,
++ DESC_LDT = 0x2,
++};
++
++// LDT or TSS descriptor in the GDT. 16 bytes.
++struct ldttss_desc {
++ u16 limit0;
++ u16 base0;
++ unsigned base1 : 8, type : 5, dpl : 2, p : 1;
++ unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
++ u32 base3;
++ u32 zero1;
++} __attribute__((packed));
++
++struct desc_ptr {
++ unsigned short size;
++ unsigned long address;
++} __attribute__((packed)) ;
++
++extern struct desc_ptr idt_descr, cpu_gdt_descr[NR_CPUS];
++
++extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
++
++#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
++#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
++
++static inline void clear_LDT(void)
++{
++ int cpu = get_cpu();
++
++ /*
++ * NB. We load the default_ldt for lcall7/27 handling on demand, as
++ * it slows down context switching. Noone uses it anyway.
++ */
++ cpu = cpu; /* XXX avoid compiler warning */
++ xen_set_ldt(NULL, 0);
++ put_cpu();
++}
++
++/*
++ * This is the ldt that every process will get unless we need
++ * something other than this.
++ */
++extern struct desc_struct default_ldt[];
++#ifndef CONFIG_X86_NO_IDT
++extern struct gate_struct idt_table[];
++#endif
++extern struct desc_ptr cpu_gdt_descr[];
++
++/* the cpu gdt accessor */
++#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
++
++static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist)
++{
++ struct gate_struct s;
++ s.offset_low = PTR_LOW(func);
++ s.segment = __KERNEL_CS;
++ s.ist = ist;
++ s.p = 1;
++ s.dpl = dpl;
++ s.zero0 = 0;
++ s.zero1 = 0;
++ s.type = type;
++ s.offset_middle = PTR_MIDDLE(func);
++ s.offset_high = PTR_HIGH(func);
++ /* does not need to be atomic because it is only done once at setup time */
++ memcpy(adr, &s, 16);
++}
++
++#ifndef CONFIG_X86_NO_IDT
++static inline void set_intr_gate(int nr, void *func)
++{
++ BUG_ON((unsigned)nr > 0xFF);
++ _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
++}
++
++static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
++{
++ BUG_ON((unsigned)nr > 0xFF);
++ _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
++}
++
++static inline void set_system_gate(int nr, void *func)
++{
++ BUG_ON((unsigned)nr > 0xFF);
++ _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
++}
++
++static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
++{
++ _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
++}
++#endif
++
++static inline void set_tssldt_descriptor(void *ptr, unsigned long tss, unsigned type,
++ unsigned size)
++{
++ struct ldttss_desc d;
++ memset(&d,0,sizeof(d));
++ d.limit0 = size & 0xFFFF;
++ d.base0 = PTR_LOW(tss);
++ d.base1 = PTR_MIDDLE(tss) & 0xFF;
++ d.type = type;
++ d.p = 1;
++ d.limit1 = (size >> 16) & 0xF;
++ d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
++ d.base3 = PTR_HIGH(tss);
++ memcpy(ptr, &d, 16);
++}
++
++#ifndef CONFIG_X86_NO_TSS
++static inline void set_tss_desc(unsigned cpu, void *addr)
++{
++ /*
++ * sizeof(unsigned long) coming from an extra "long" at the end
++ * of the iobitmap. See tss_struct definition in processor.h
++ *
++ * -1? seg base+limit should be pointing to the address of the
++ * last valid byte
++ */
++ set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
++ (unsigned long)addr, DESC_TSS,
++ IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
++}
++#endif
++
++static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
++{
++ set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
++ DESC_LDT, size * 8 - 1);
++}
++
++static inline void set_seg_base(unsigned cpu, int entry, void *base)
++{
++ struct desc_struct *d = &cpu_gdt(cpu)[entry];
++ u32 addr = (u32)(u64)base;
++ BUG_ON((u64)base >> 32);
++ d->base0 = addr & 0xffff;
++ d->base1 = (addr >> 16) & 0xff;
++ d->base2 = (addr >> 24) & 0xff;
++}
++
++#define LDT_entry_a(info) \
++ ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
++/* Don't allow setting of the lm bit. It is useless anyways because
++ 64bit system calls require __USER_CS. */
++#define LDT_entry_b(info) \
++ (((info)->base_addr & 0xff000000) | \
++ (((info)->base_addr & 0x00ff0000) >> 16) | \
++ ((info)->limit & 0xf0000) | \
++ (((info)->read_exec_only ^ 1) << 9) | \
++ ((info)->contents << 10) | \
++ (((info)->seg_not_present ^ 1) << 15) | \
++ ((info)->seg_32bit << 22) | \
++ ((info)->limit_in_pages << 23) | \
++ ((info)->useable << 20) | \
++ /* ((info)->lm << 21) | */ \
++ 0x7000)
++
++#define LDT_empty(info) (\
++ (info)->base_addr == 0 && \
++ (info)->limit == 0 && \
++ (info)->contents == 0 && \
++ (info)->read_exec_only == 1 && \
++ (info)->seg_32bit == 0 && \
++ (info)->limit_in_pages == 0 && \
++ (info)->seg_not_present == 1 && \
++ (info)->useable == 0 && \
++ (info)->lm == 0)
++
++#if TLS_SIZE != 24
++# error update this code.
++#endif
++
++static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
++{
++#if 0
++ u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
++ gdt[0] = t->tls_array[0];
++ gdt[1] = t->tls_array[1];
++ gdt[2] = t->tls_array[2];
++#endif
++#define C(i) \
++ if (HYPERVISOR_update_descriptor(virt_to_machine(&cpu_gdt(cpu)[GDT_ENTRY_TLS_MIN + i]), \
++ t->tls_array[i])) \
++ BUG();
++
++ C(0); C(1); C(2);
++#undef C
++}
++
++/*
++ * load one particular LDT into the current CPU
++ */
++static inline void load_LDT_nolock (mm_context_t *pc, int cpu)
++{
++ void *segments = pc->ldt;
++ int count = pc->size;
++
++ if (likely(!count))
++ segments = NULL;
++
++ xen_set_ldt(segments, count);
++}
++
++static inline void load_LDT(mm_context_t *pc)
++{
++ int cpu = get_cpu();
++ load_LDT_nolock(pc, cpu);
++ put_cpu();
++}
++
++extern struct desc_ptr idt_descr;
++
++#endif /* !__ASSEMBLY__ */
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/dma-mapping_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/dma-mapping_64.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,207 @@
++#ifndef _X8664_DMA_MAPPING_H
++#define _X8664_DMA_MAPPING_H 1
++
++/*
++ * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
++ * documentation.
++ */
++
++
++#include <asm/scatterlist.h>
++#include <asm/io.h>
++#include <asm/swiotlb.h>
++
++struct dma_mapping_ops {
++ int (*mapping_error)(dma_addr_t dma_addr);
++ void* (*alloc_coherent)(struct device *dev, size_t size,
++ dma_addr_t *dma_handle, gfp_t gfp);
++ void (*free_coherent)(struct device *dev, size_t size,
++ void *vaddr, dma_addr_t dma_handle);
++ dma_addr_t (*map_single)(struct device *hwdev, void *ptr,
++ size_t size, int direction);
++ /* like map_single, but doesn't check the device mask */
++ dma_addr_t (*map_simple)(struct device *hwdev, char *ptr,
++ size_t size, int direction);
++ void (*unmap_single)(struct device *dev, dma_addr_t addr,
++ size_t size, int direction);
++ void (*sync_single_for_cpu)(struct device *hwdev,
++ dma_addr_t dma_handle, size_t size,
++ int direction);
++ void (*sync_single_for_device)(struct device *hwdev,
++ dma_addr_t dma_handle, size_t size,
++ int direction);
++ void (*sync_single_range_for_cpu)(struct device *hwdev,
++ dma_addr_t dma_handle, unsigned long offset,
++ size_t size, int direction);
++ void (*sync_single_range_for_device)(struct device *hwdev,
++ dma_addr_t dma_handle, unsigned long offset,
++ size_t size, int direction);
++ void (*sync_sg_for_cpu)(struct device *hwdev,
++ struct scatterlist *sg, int nelems,
++ int direction);
++ void (*sync_sg_for_device)(struct device *hwdev,
++ struct scatterlist *sg, int nelems,
++ int direction);
++ int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
++ int nents, int direction);
++ void (*unmap_sg)(struct device *hwdev,
++ struct scatterlist *sg, int nents,
++ int direction);
++ int (*dma_supported)(struct device *hwdev, u64 mask);
++ int is_phys;
++};
++
++extern dma_addr_t bad_dma_address;
++extern struct dma_mapping_ops* dma_ops;
++extern int iommu_merge;
++
++static inline int valid_dma_direction(int dma_direction)
++{
++ return ((dma_direction == DMA_BIDIRECTIONAL) ||
++ (dma_direction == DMA_TO_DEVICE) ||
++ (dma_direction == DMA_FROM_DEVICE));
++}
++
++#if 0
++static inline int dma_mapping_error(dma_addr_t dma_addr)
++{
++ if (dma_ops->mapping_error)
++ return dma_ops->mapping_error(dma_addr);
++
++ return (dma_addr == bad_dma_address);
++}
++
++extern void *dma_alloc_coherent(struct device *dev, size_t size,
++ dma_addr_t *dma_handle, gfp_t gfp);
++extern void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
++ dma_addr_t dma_handle);
++
++static inline dma_addr_t
++dma_map_single(struct device *hwdev, void *ptr, size_t size,
++ int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ return dma_ops->map_single(hwdev, ptr, size, direction);
++}
++
++static inline void
++dma_unmap_single(struct device *dev, dma_addr_t addr,size_t size,
++ int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ dma_ops->unmap_single(dev, addr, size, direction);
++}
++
++#define dma_map_page(dev,page,offset,size,dir) \
++ dma_map_single((dev), page_address(page)+(offset), (size), (dir))
++
++#define dma_unmap_page dma_unmap_single
++
++static inline void
++dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
++ size_t size, int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ if (dma_ops->sync_single_for_cpu)
++ dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
++ direction);
++ flush_write_buffers();
++}
++
++static inline void
++dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
++ size_t size, int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ if (dma_ops->sync_single_for_device)
++ dma_ops->sync_single_for_device(hwdev, dma_handle, size,
++ direction);
++ flush_write_buffers();
++}
++
++static inline void
++dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
++ unsigned long offset, size_t size, int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ if (dma_ops->sync_single_range_for_cpu) {
++ dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, size, direction);
++ }
++
++ flush_write_buffers();
++}
++
++static inline void
++dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
++ unsigned long offset, size_t size, int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ if (dma_ops->sync_single_range_for_device)
++ dma_ops->sync_single_range_for_device(hwdev, dma_handle,
++ offset, size, direction);
++
++ flush_write_buffers();
++}
++
++static inline void
++dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
++ int nelems, int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ if (dma_ops->sync_sg_for_cpu)
++ dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
++ flush_write_buffers();
++}
++
++static inline void
++dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
++ int nelems, int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ if (dma_ops->sync_sg_for_device) {
++ dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction);
++ }
++
++ flush_write_buffers();
++}
++
++static inline int
++dma_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ return dma_ops->map_sg(hwdev, sg, nents, direction);
++}
++
++static inline void
++dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
++ int direction)
++{
++ BUG_ON(!valid_dma_direction(direction));
++ dma_ops->unmap_sg(hwdev, sg, nents, direction);
++}
++
++extern int dma_supported(struct device *hwdev, u64 mask);
++
++/* same for gart, swiotlb, and nommu */
++static inline int dma_get_cache_alignment(void)
++{
++ return boot_cpu_data.x86_clflush_size;
++}
++
++#define dma_is_consistent(h) 1
++
++extern int dma_set_mask(struct device *dev, u64 mask);
++
++static inline void
++dma_cache_sync(void *vaddr, size_t size, enum dma_data_direction dir)
++{
++ flush_write_buffers();
++}
++
++extern struct device fallback_dev;
++extern int panic_on_overflow;
++#endif
++
++#endif /* _X8664_DMA_MAPPING_H */
++
++#include <asm-i386/mach-xen/asm/dma-mapping.h>
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/fixmap_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/fixmap_64.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,112 @@
++/*
++ * fixmap.h: compile-time virtual memory allocation
++ *
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 1998 Ingo Molnar
++ */
++
++#ifndef _ASM_FIXMAP_H
++#define _ASM_FIXMAP_H
++
++#include <linux/kernel.h>
++#include <asm/apicdef.h>
++#include <asm/page.h>
++#include <asm/vsyscall.h>
++#include <asm/vsyscall32.h>
++#include <asm/acpi.h>
++
++/*
++ * Here we define all the compile-time 'special' virtual
++ * addresses. The point is to have a constant address at
++ * compile time, but to set the physical address only
++ * in the boot process.
++ *
++ * these 'compile-time allocated' memory buffers are
++ * fixed-size 4k pages. (or larger if used with an increment
++ * highger than 1) use fixmap_set(idx,phys) to associate
++ * physical memory with fixmap indices.
++ *
++ * TLB entries of such buffers will not be flushed across
++ * task switches.
++ */
++
++enum fixed_addresses {
++ VSYSCALL_LAST_PAGE,
++ VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE + ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1,
++ VSYSCALL_HPET,
++ FIX_HPET_BASE,
++#ifdef CONFIG_X86_LOCAL_APIC
++ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
++#endif
++#ifdef CONFIG_X86_IO_APIC
++ FIX_IO_APIC_BASE_0,
++ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
++#endif
++#ifdef CONFIG_ACPI
++ FIX_ACPI_BEGIN,
++ FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
++#endif
++ FIX_SHARED_INFO,
++#define NR_FIX_ISAMAPS 256
++ FIX_ISAMAP_END,
++ FIX_ISAMAP_BEGIN = FIX_ISAMAP_END + NR_FIX_ISAMAPS - 1,
++ __end_of_permanent_fixed_addresses,
++ /* temporary boot-time mappings, used before ioremap() is functional */
++#define NR_FIX_BTMAPS 16
++ FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
++ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS - 1,
++ __end_of_fixed_addresses
++};
++
++extern void __set_fixmap (enum fixed_addresses idx,
++ unsigned long phys, pgprot_t flags);
++
++#define set_fixmap(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL)
++/*
++ * Some hardware wants to get fixmapped without caching.
++ */
++#define set_fixmap_nocache(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
++
++#define clear_fixmap(idx) \
++ __set_fixmap(idx, 0, __pgprot(0))
++
++#define FIXADDR_TOP (VSYSCALL_END-PAGE_SIZE)
++#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
++#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
++
++/* Only covers 32bit vsyscalls currently. Need another set for 64bit. */
++#define FIXADDR_USER_START ((unsigned long)VSYSCALL32_VSYSCALL)
++#define FIXADDR_USER_END (FIXADDR_USER_START + PAGE_SIZE)
++
++#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
++
++extern void __this_fixmap_does_not_exist(void);
++
++/*
++ * 'index to address' translation. If anyone tries to use the idx
++ * directly without translation, we catch the bug with a NULL-deference
++ * kernel oops. Illegal ranges of incoming indices are caught too.
++ */
++static __always_inline unsigned long fix_to_virt(const unsigned int idx)
++{
++ /*
++ * this branch gets completely eliminated after inlining,
++ * except when someone tries to use fixaddr indices in an
++ * illegal way. (such as mixing up address types or using
++ * out-of-range indices).
++ *
++ * If it doesn't get removed, the linker will complain
++ * loudly with a reasonably clear error message..
++ */
++ if (idx >= __end_of_fixed_addresses)
++ __this_fixmap_does_not_exist();
++
++ return __fix_to_virt(idx);
++}
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/hypercall_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/hypercall_64.h 2008-11-25 12:22:34.000000000 +0100
+@@ -0,0 +1,408 @@
++/******************************************************************************
++ * hypercall.h
++ *
++ * Linux-specific hypervisor handling.
++ *
++ * Copyright (c) 2002-2004, K A Fraser
++ *
++ * 64-bit updates:
++ * Benjamin Liu <benjamin.liu@intel.com>
++ * Jun Nakajima <jun.nakajima@intel.com>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __HYPERCALL_H__
++#define __HYPERCALL_H__
++
++#include <linux/string.h> /* memcpy() */
++#include <linux/stringify.h>
++
++#ifndef __HYPERVISOR_H__
++# error "please don't include this file directly"
++#endif
++
++#ifdef CONFIG_XEN
++#define HYPERCALL_STR(name) \
++ "call hypercall_page + ("__stringify(__HYPERVISOR_##name)" * 32)"
++#else
++#define HYPERCALL_STR(name) \
++ "mov $("__stringify(__HYPERVISOR_##name)" * 32),%%eax; "\
++ "add hypercall_stubs(%%rip),%%rax; " \
++ "call *%%rax"
++#endif
++
++#define _hypercall0(type, name) \
++({ \
++ type __res; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res) \
++ : \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall1(type, name, a1) \
++({ \
++ type __res; \
++ long __ign1; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=D" (__ign1) \
++ : "1" ((long)(a1)) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall2(type, name, a1, a2) \
++({ \
++ type __res; \
++ long __ign1, __ign2; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=D" (__ign1), "=S" (__ign2) \
++ : "1" ((long)(a1)), "2" ((long)(a2)) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall3(type, name, a1, a2, a3) \
++({ \
++ type __res; \
++ long __ign1, __ign2, __ign3; \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
++ "=d" (__ign3) \
++ : "1" ((long)(a1)), "2" ((long)(a2)), \
++ "3" ((long)(a3)) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall4(type, name, a1, a2, a3, a4) \
++({ \
++ type __res; \
++ long __ign1, __ign2, __ign3; \
++ register long __arg4 asm("r10") = (long)(a4); \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
++ "=d" (__ign3), "+r" (__arg4) \
++ : "1" ((long)(a1)), "2" ((long)(a2)), \
++ "3" ((long)(a3)) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
++({ \
++ type __res; \
++ long __ign1, __ign2, __ign3; \
++ register long __arg4 asm("r10") = (long)(a4); \
++ register long __arg5 asm("r8") = (long)(a5); \
++ asm volatile ( \
++ HYPERCALL_STR(name) \
++ : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
++ "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) \
++ : "1" ((long)(a1)), "2" ((long)(a2)), \
++ "3" ((long)(a3)) \
++ : "memory" ); \
++ __res; \
++})
++
++static inline int __must_check
++HYPERVISOR_set_trap_table(
++ const trap_info_t *table)
++{
++ return _hypercall1(int, set_trap_table, table);
++}
++
++static inline int __must_check
++HYPERVISOR_mmu_update(
++ mmu_update_t *req, unsigned int count, unsigned int *success_count,
++ domid_t domid)
++{
++ return _hypercall4(int, mmu_update, req, count, success_count, domid);
++}
++
++static inline int __must_check
++HYPERVISOR_mmuext_op(
++ struct mmuext_op *op, unsigned int count, unsigned int *success_count,
++ domid_t domid)
++{
++ return _hypercall4(int, mmuext_op, op, count, success_count, domid);
++}
++
++static inline int __must_check
++HYPERVISOR_set_gdt(
++ unsigned long *frame_list, unsigned int entries)
++{
++ return _hypercall2(int, set_gdt, frame_list, entries);
++}
++
++static inline int __must_check
++HYPERVISOR_stack_switch(
++ unsigned long ss, unsigned long esp)
++{
++ return _hypercall2(int, stack_switch, ss, esp);
++}
++
++static inline int __must_check
++HYPERVISOR_set_callbacks(
++ unsigned long event_address, unsigned long failsafe_address,
++ unsigned long syscall_address)
++{
++ return _hypercall3(int, set_callbacks,
++ event_address, failsafe_address, syscall_address);
++}
++
++static inline int
++HYPERVISOR_fpu_taskswitch(
++ int set)
++{
++ return _hypercall1(int, fpu_taskswitch, set);
++}
++
++static inline int __must_check
++HYPERVISOR_sched_op_compat(
++ int cmd, unsigned long arg)
++{
++ return _hypercall2(int, sched_op_compat, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_sched_op(
++ int cmd, void *arg)
++{
++ return _hypercall2(int, sched_op, cmd, arg);
++}
++
++static inline long __must_check
++HYPERVISOR_set_timer_op(
++ u64 timeout)
++{
++ return _hypercall1(long, set_timer_op, timeout);
++}
++
++static inline int __must_check
++HYPERVISOR_platform_op(
++ struct xen_platform_op *platform_op)
++{
++ platform_op->interface_version = XENPF_INTERFACE_VERSION;
++ return _hypercall1(int, platform_op, platform_op);
++}
++
++static inline int __must_check
++HYPERVISOR_set_debugreg(
++ unsigned int reg, unsigned long value)
++{
++ return _hypercall2(int, set_debugreg, reg, value);
++}
++
++static inline unsigned long __must_check
++HYPERVISOR_get_debugreg(
++ unsigned int reg)
++{
++ return _hypercall1(unsigned long, get_debugreg, reg);
++}
++
++static inline int __must_check
++HYPERVISOR_update_descriptor(
++ unsigned long ma, unsigned long word)
++{
++ return _hypercall2(int, update_descriptor, ma, word);
++}
++
++static inline int __must_check
++HYPERVISOR_memory_op(
++ unsigned int cmd, void *arg)
++{
++ return _hypercall2(int, memory_op, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_multicall(
++ multicall_entry_t *call_list, unsigned int nr_calls)
++{
++ return _hypercall2(int, multicall, call_list, nr_calls);
++}
++
++static inline int __must_check
++HYPERVISOR_update_va_mapping(
++ unsigned long va, pte_t new_val, unsigned long flags)
++{
++ return _hypercall3(int, update_va_mapping, va, new_val.pte, flags);
++}
++
++static inline int __must_check
++HYPERVISOR_event_channel_op(
++ int cmd, void *arg)
++{
++ int rc = _hypercall2(int, event_channel_op, cmd, arg);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ struct evtchn_op op;
++ op.cmd = cmd;
++ memcpy(&op.u, arg, sizeof(op.u));
++ rc = _hypercall1(int, event_channel_op_compat, &op);
++ memcpy(arg, &op.u, sizeof(op.u));
++ }
++#endif
++
++ return rc;
++}
++
++static inline int __must_check
++HYPERVISOR_xen_version(
++ int cmd, void *arg)
++{
++ return _hypercall2(int, xen_version, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_console_io(
++ int cmd, unsigned int count, char *str)
++{
++ return _hypercall3(int, console_io, cmd, count, str);
++}
++
++static inline int __must_check
++HYPERVISOR_physdev_op(
++ int cmd, void *arg)
++{
++ int rc = _hypercall2(int, physdev_op, cmd, arg);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ struct physdev_op op;
++ op.cmd = cmd;
++ memcpy(&op.u, arg, sizeof(op.u));
++ rc = _hypercall1(int, physdev_op_compat, &op);
++ memcpy(arg, &op.u, sizeof(op.u));
++ }
++#endif
++
++ return rc;
++}
++
++static inline int __must_check
++HYPERVISOR_grant_table_op(
++ unsigned int cmd, void *uop, unsigned int count)
++{
++ return _hypercall3(int, grant_table_op, cmd, uop, count);
++}
++
++static inline int __must_check
++HYPERVISOR_update_va_mapping_otherdomain(
++ unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
++{
++ return _hypercall4(int, update_va_mapping_otherdomain, va,
++ new_val.pte, flags, domid);
++}
++
++static inline int __must_check
++HYPERVISOR_vm_assist(
++ unsigned int cmd, unsigned int type)
++{
++ return _hypercall2(int, vm_assist, cmd, type);
++}
++
++static inline int __must_check
++HYPERVISOR_vcpu_op(
++ int cmd, unsigned int vcpuid, void *extra_args)
++{
++ return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
++}
++
++static inline int __must_check
++HYPERVISOR_set_segment_base(
++ int reg, unsigned long value)
++{
++ return _hypercall2(int, set_segment_base, reg, value);
++}
++
++static inline int __must_check
++HYPERVISOR_suspend(
++ unsigned long srec)
++{
++ struct sched_shutdown sched_shutdown = {
++ .reason = SHUTDOWN_suspend
++ };
++
++ int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
++ &sched_shutdown, srec);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (rc == -ENOSYS)
++ rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
++ SHUTDOWN_suspend, srec);
++#endif
++
++ return rc;
++}
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++static inline int
++HYPERVISOR_nmi_op(
++ unsigned long op, void *arg)
++{
++ return _hypercall2(int, nmi_op, op, arg);
++}
++#endif
++
++#ifndef CONFIG_XEN
++static inline unsigned long __must_check
++HYPERVISOR_hvm_op(
++ int op, void *arg)
++{
++ return _hypercall2(unsigned long, hvm_op, op, arg);
++}
++#endif
++
++static inline int __must_check
++HYPERVISOR_callback_op(
++ int cmd, const void *arg)
++{
++ return _hypercall2(int, callback_op, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_xenoprof_op(
++ int op, void *arg)
++{
++ return _hypercall2(int, xenoprof_op, op, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_kexec_op(
++ unsigned long op, void *args)
++{
++ return _hypercall2(int, kexec_op, op, args);
++}
++
++#endif /* __HYPERCALL_H__ */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/io_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/io_64.h 2007-08-16 18:07:01.000000000 +0200
+@@ -0,0 +1,329 @@
++#ifndef _ASM_IO_H
++#define _ASM_IO_H
++
++#include <asm/fixmap.h>
++
++/*
++ * This file contains the definitions for the x86 IO instructions
++ * inb/inw/inl/outb/outw/outl and the "string versions" of the same
++ * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
++ * versions of the single-IO instructions (inb_p/inw_p/..).
++ *
++ * This file is not meant to be obfuscating: it's just complicated
++ * to (a) handle it all in a way that makes gcc able to optimize it
++ * as well as possible and (b) trying to avoid writing the same thing
++ * over and over again with slight variations and possibly making a
++ * mistake somewhere.
++ */
++
++/*
++ * Thanks to James van Artsdalen for a better timing-fix than
++ * the two short jumps: using outb's to a nonexistent port seems
++ * to guarantee better timings even on fast machines.
++ *
++ * On the other hand, I'd like to be sure of a non-existent port:
++ * I feel a bit unsafe about using 0x80 (should be safe, though)
++ *
++ * Linus
++ */
++
++ /*
++ * Bit simplified and optimized by Jan Hubicka
++ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
++ *
++ * isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,
++ * isa_read[wl] and isa_write[wl] fixed
++ * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
++ */
++
++#define __SLOW_DOWN_IO "\noutb %%al,$0x80"
++
++#ifdef REALLY_SLOW_IO
++#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
++#else
++#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO
++#endif
++
++/*
++ * Talk about misusing macros..
++ */
++#define __OUT1(s,x) \
++static inline void out##s(unsigned x value, unsigned short port) {
++
++#define __OUT2(s,s1,s2) \
++__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
++
++#define __OUT(s,s1,x) \
++__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
++__OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} \
++
++#define __IN1(s) \
++static inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
++
++#define __IN2(s,s1,s2) \
++__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
++
++#define __IN(s,s1,i...) \
++__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
++__IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
++
++#define __INS(s) \
++static inline void ins##s(unsigned short port, void * addr, unsigned long count) \
++{ __asm__ __volatile__ ("rep ; ins" #s \
++: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
++
++#define __OUTS(s) \
++static inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
++{ __asm__ __volatile__ ("rep ; outs" #s \
++: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
++
++#define RETURN_TYPE unsigned char
++__IN(b,"")
++#undef RETURN_TYPE
++#define RETURN_TYPE unsigned short
++__IN(w,"")
++#undef RETURN_TYPE
++#define RETURN_TYPE unsigned int
++__IN(l,"")
++#undef RETURN_TYPE
++
++__OUT(b,"b",char)
++__OUT(w,"w",short)
++__OUT(l,,int)
++
++__INS(b)
++__INS(w)
++__INS(l)
++
++__OUTS(b)
++__OUTS(w)
++__OUTS(l)
++
++#define IO_SPACE_LIMIT 0xffff
++
++#if defined(__KERNEL__) && __x86_64__
++
++#include <linux/vmalloc.h>
++
++#ifndef __i386__
++/*
++ * Change virtual addresses to physical addresses and vv.
++ * These are pretty trivial
++ */
++static inline unsigned long virt_to_phys(volatile void * address)
++{
++ return __pa(address);
++}
++
++static inline void * phys_to_virt(unsigned long address)
++{
++ return __va(address);
++}
++
++#define virt_to_bus(_x) phys_to_machine(__pa(_x))
++#define bus_to_virt(_x) __va(machine_to_phys(_x))
++#endif
++
++/*
++ * Change "struct page" to physical address.
++ */
++#define page_to_pseudophys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
++#define page_to_phys(page) (phys_to_machine(page_to_pseudophys(page)))
++#define page_to_bus(page) (phys_to_machine(page_to_pseudophys(page)))
++
++#define bio_to_pseudophys(bio) (page_to_pseudophys(bio_page((bio))) + \
++ (unsigned long) bio_offset((bio)))
++#define bvec_to_pseudophys(bv) (page_to_pseudophys((bv)->bv_page) + \
++ (unsigned long) (bv)->bv_offset)
++
++#define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
++ (((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) && \
++ ((bvec_to_pseudophys((vec1)) + (vec1)->bv_len) == \
++ bvec_to_pseudophys((vec2))))
++
++#include <asm-generic/iomap.h>
++
++extern void __iomem *__ioremap(unsigned long offset, unsigned long size, unsigned long flags);
++
++static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
++{
++ return __ioremap(offset, size, 0);
++}
++
++extern void *bt_ioremap(unsigned long addr, unsigned long size);
++extern void bt_iounmap(void *addr, unsigned long size);
++#define early_ioremap bt_ioremap
++#define early_iounmap bt_iounmap
++
++/*
++ * This one maps high address device memory and turns off caching for that area.
++ * it's useful if some control registers are in such an area and write combining
++ * or read caching is not desirable:
++ */
++extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
++extern void iounmap(volatile void __iomem *addr);
++
++/*
++ * ISA I/O bus memory addresses are 1:1 with the physical address.
++ */
++
++#define isa_virt_to_bus(_x) ({ BUG(); virt_to_bus(_x); })
++#define isa_page_to_bus(_x) isa_page_to_bus_is_UNSUPPORTED->x
++#define isa_bus_to_virt(_x) (void *)(__fix_to_virt(FIX_ISAMAP_BEGIN) + (_x))
++
++/*
++ * However PCI ones are not necessarily 1:1 and therefore these interfaces
++ * are forbidden in portable PCI drivers.
++ *
++ * Allow them on x86 for legacy drivers, though.
++ */
++#define virt_to_bus(_x) phys_to_machine(__pa(_x))
++#define bus_to_virt(_x) __va(machine_to_phys(_x))
++
++/*
++ * readX/writeX() are used to access memory mapped devices. On some
++ * architectures the memory mapped IO stuff needs to be accessed
++ * differently. On the x86 architecture, we just read/write the
++ * memory location directly.
++ */
++
++static inline __u8 __readb(const volatile void __iomem *addr)
++{
++ return *(__force volatile __u8 *)addr;
++}
++static inline __u16 __readw(const volatile void __iomem *addr)
++{
++ return *(__force volatile __u16 *)addr;
++}
++static __always_inline __u32 __readl(const volatile void __iomem *addr)
++{
++ return *(__force volatile __u32 *)addr;
++}
++static inline __u64 __readq(const volatile void __iomem *addr)
++{
++ return *(__force volatile __u64 *)addr;
++}
++#define readb(x) __readb(x)
++#define readw(x) __readw(x)
++#define readl(x) __readl(x)
++#define readq(x) __readq(x)
++#define readb_relaxed(a) readb(a)
++#define readw_relaxed(a) readw(a)
++#define readl_relaxed(a) readl(a)
++#define readq_relaxed(a) readq(a)
++#define __raw_readb readb
++#define __raw_readw readw
++#define __raw_readl readl
++#define __raw_readq readq
++
++#define mmiowb()
++
++static inline void __writel(__u32 b, volatile void __iomem *addr)
++{
++ *(__force volatile __u32 *)addr = b;
++}
++static inline void __writeq(__u64 b, volatile void __iomem *addr)
++{
++ *(__force volatile __u64 *)addr = b;
++}
++static inline void __writeb(__u8 b, volatile void __iomem *addr)
++{
++ *(__force volatile __u8 *)addr = b;
++}
++static inline void __writew(__u16 b, volatile void __iomem *addr)
++{
++ *(__force volatile __u16 *)addr = b;
++}
++#define writeq(val,addr) __writeq((val),(addr))
++#define writel(val,addr) __writel((val),(addr))
++#define writew(val,addr) __writew((val),(addr))
++#define writeb(val,addr) __writeb((val),(addr))
++#define __raw_writeb writeb
++#define __raw_writew writew
++#define __raw_writel writel
++#define __raw_writeq writeq
++
++void __memcpy_fromio(void*,unsigned long,unsigned);
++void __memcpy_toio(unsigned long,const void*,unsigned);
++
++static inline void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len)
++{
++ __memcpy_fromio(to,(unsigned long)from,len);
++}
++static inline void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len)
++{
++ __memcpy_toio((unsigned long)to,from,len);
++}
++
++void memset_io(volatile void __iomem *a, int b, size_t c);
++
++/*
++ * ISA space is 'always mapped' on a typical x86 system, no need to
++ * explicitly ioremap() it. The fact that the ISA IO space is mapped
++ * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
++ * are physical addresses. The following constant pointer can be
++ * used as the IO-area pointer (it can be iounmapped as well, so the
++ * analogy with PCI is quite large):
++ */
++#define __ISA_IO_base ((char __iomem *)(fix_to_virt(FIX_ISAMAP_BEGIN)))
++
++/*
++ * Again, x86-64 does not require mem IO specific function.
++ */
++
++#define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void *)(b),(c),(d))
++
++/**
++ * check_signature - find BIOS signatures
++ * @io_addr: mmio address to check
++ * @signature: signature block
++ * @length: length of signature
++ *
++ * Perform a signature comparison with the mmio address io_addr. This
++ * address should have been obtained by ioremap.
++ * Returns 1 on a match.
++ */
++
++static inline int check_signature(void __iomem *io_addr,
++ const unsigned char *signature, int length)
++{
++ int retval = 0;
++ do {
++ if (readb(io_addr) != *signature)
++ goto out;
++ io_addr++;
++ signature++;
++ length--;
++ } while (length);
++ retval = 1;
++out:
++ return retval;
++}
++
++/* Nothing to do */
++
++#define dma_cache_inv(_start,_size) do { } while (0)
++#define dma_cache_wback(_start,_size) do { } while (0)
++#define dma_cache_wback_inv(_start,_size) do { } while (0)
++
++#define flush_write_buffers()
++
++extern int iommu_bio_merge;
++#define BIO_VMERGE_BOUNDARY iommu_bio_merge
++
++/*
++ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
++ * access
++ */
++#define xlate_dev_mem_ptr(p) __va(p)
++
++/*
++ * Convert a virtual cached pointer to an uncached pointer
++ */
++#define xlate_dev_kmem_ptr(p) p
++
++#endif /* __KERNEL__ */
++
++#define ARCH_HAS_DEV_MEM
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/irqflags_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/irqflags_64.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,139 @@
++/*
++ * include/asm-x86_64/irqflags.h
++ *
++ * IRQ flags handling
++ *
++ * This file gets included from lowlevel asm headers too, to provide
++ * wrapped versions of the local_irq_*() APIs, based on the
++ * raw_local_irq_*() functions from the lowlevel headers.
++ */
++#ifndef _ASM_IRQFLAGS_H
++#define _ASM_IRQFLAGS_H
++
++#ifndef __ASSEMBLY__
++/*
++ * Interrupt control:
++ */
++
++/*
++ * The use of 'barrier' in the following reflects their use as local-lock
++ * operations. Reentrancy must be prevented (e.g., __cli()) /before/ following
++ * critical operations are executed. All critical operations must complete
++ * /before/ reentrancy is permitted (e.g., __sti()). Alpha architecture also
++ * includes these barriers, for example.
++ */
++
++#define __raw_local_save_flags() (current_vcpu_info()->evtchn_upcall_mask)
++
++#define raw_local_save_flags(flags) \
++ do { (flags) = __raw_local_save_flags(); } while (0)
++
++#define raw_local_irq_restore(x) \
++do { \
++ vcpu_info_t *_vcpu; \
++ barrier(); \
++ _vcpu = current_vcpu_info(); \
++ if ((_vcpu->evtchn_upcall_mask = (x)) == 0) { \
++ barrier(); /* unmask then check (avoid races) */ \
++ if ( unlikely(_vcpu->evtchn_upcall_pending) ) \
++ force_evtchn_callback(); \
++ } \
++} while (0)
++
++#ifdef CONFIG_X86_VSMP
++
++/*
++ * Interrupt control for the VSMP architecture:
++ */
++
++static inline void raw_local_irq_disable(void)
++{
++ unsigned long flags = __raw_local_save_flags();
++
++ raw_local_irq_restore((flags & ~(1 << 9)) | (1 << 18));
++}
++
++static inline void raw_local_irq_enable(void)
++{
++ unsigned long flags = __raw_local_save_flags();
++
++ raw_local_irq_restore((flags | (1 << 9)) & ~(1 << 18));
++}
++
++static inline int raw_irqs_disabled_flags(unsigned long flags)
++{
++ return !(flags & (1<<9)) || (flags & (1 << 18));
++}
++
++#else /* CONFIG_X86_VSMP */
++
++#define raw_local_irq_disable() \
++do { \
++ current_vcpu_info()->evtchn_upcall_mask = 1; \
++ barrier(); \
++} while (0)
++
++#define raw_local_irq_enable() \
++do { \
++ vcpu_info_t *_vcpu; \
++ barrier(); \
++ _vcpu = current_vcpu_info(); \
++ _vcpu->evtchn_upcall_mask = 0; \
++ barrier(); /* unmask then check (avoid races) */ \
++ if ( unlikely(_vcpu->evtchn_upcall_pending) ) \
++ force_evtchn_callback(); \
++} while (0)
++
++static inline int raw_irqs_disabled_flags(unsigned long flags)
++{
++ return (flags != 0);
++}
++
++#endif
++
++/*
++ * For spinlocks, etc.:
++ */
++
++#define __raw_local_irq_save() \
++({ \
++ unsigned long flags = __raw_local_save_flags(); \
++ \
++ raw_local_irq_disable(); \
++ \
++ flags; \
++})
++
++#define raw_local_irq_save(flags) \
++ do { (flags) = __raw_local_irq_save(); } while (0)
++
++#define raw_irqs_disabled() \
++({ \
++ unsigned long flags = __raw_local_save_flags(); \
++ \
++ raw_irqs_disabled_flags(flags); \
++})
++
++/*
++ * Used in the idle loop; sti takes one instruction cycle
++ * to complete:
++ */
++void raw_safe_halt(void);
++
++/*
++ * Used when interrupts are already enabled or to
++ * shutdown the processor:
++ */
++void halt(void);
++
++#else /* __ASSEMBLY__: */
++# ifdef CONFIG_TRACE_IRQFLAGS
++# define TRACE_IRQS_ON call trace_hardirqs_on_thunk
++# define TRACE_IRQS_OFF call trace_hardirqs_off_thunk
++# else
++# define TRACE_IRQS_ON
++# define TRACE_IRQS_OFF
++# endif
++#endif
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/maddr_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/maddr_64.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,161 @@
++#ifndef _X86_64_MADDR_H
++#define _X86_64_MADDR_H
++
++#include <xen/features.h>
++#include <xen/interface/xen.h>
++
++/**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/
++#define INVALID_P2M_ENTRY (~0UL)
++#define FOREIGN_FRAME_BIT (1UL<<63)
++#define FOREIGN_FRAME(m) ((m) | FOREIGN_FRAME_BIT)
++
++/* Definitions for machine and pseudophysical addresses. */
++typedef unsigned long paddr_t;
++typedef unsigned long maddr_t;
++
++#ifdef CONFIG_XEN
++
++extern unsigned long *phys_to_machine_mapping;
++
++#undef machine_to_phys_mapping
++extern unsigned long *machine_to_phys_mapping;
++extern unsigned int machine_to_phys_order;
++
++static inline unsigned long pfn_to_mfn(unsigned long pfn)
++{
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return pfn;
++ BUG_ON(end_pfn && pfn >= end_pfn);
++ return phys_to_machine_mapping[pfn] & ~FOREIGN_FRAME_BIT;
++}
++
++static inline int phys_to_machine_mapping_valid(unsigned long pfn)
++{
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return 1;
++ BUG_ON(end_pfn && pfn >= end_pfn);
++ return (phys_to_machine_mapping[pfn] != INVALID_P2M_ENTRY);
++}
++
++static inline unsigned long mfn_to_pfn(unsigned long mfn)
++{
++ unsigned long pfn;
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return mfn;
++
++ if (unlikely((mfn >> machine_to_phys_order) != 0))
++ return end_pfn;
++
++ /* The array access can fail (e.g., device space beyond end of RAM). */
++ asm (
++ "1: movq %1,%0\n"
++ "2:\n"
++ ".section .fixup,\"ax\"\n"
++ "3: movq %2,%0\n"
++ " jmp 2b\n"
++ ".previous\n"
++ ".section __ex_table,\"a\"\n"
++ " .align 8\n"
++ " .quad 1b,3b\n"
++ ".previous"
++ : "=r" (pfn)
++ : "m" (machine_to_phys_mapping[mfn]), "m" (end_pfn) );
++
++ return pfn;
++}
++
++/*
++ * We detect special mappings in one of two ways:
++ * 1. If the MFN is an I/O page then Xen will set the m2p entry
++ * to be outside our maximum possible pseudophys range.
++ * 2. If the MFN belongs to a different domain then we will certainly
++ * not have MFN in our p2m table. Conversely, if the page is ours,
++ * then we'll have p2m(m2p(MFN))==MFN.
++ * If we detect a special mapping then it doesn't have a 'struct page'.
++ * We force !pfn_valid() by returning an out-of-range pointer.
++ *
++ * NB. These checks require that, for any MFN that is not in our reservation,
++ * there is no PFN such that p2m(PFN) == MFN. Otherwise we can get confused if
++ * we are foreign-mapping the MFN, and the other domain as m2p(MFN) == PFN.
++ * Yikes! Various places must poke in INVALID_P2M_ENTRY for safety.
++ *
++ * NB2. When deliberately mapping foreign pages into the p2m table, you *must*
++ * use FOREIGN_FRAME(). This will cause pte_pfn() to choke on it, as we
++ * require. In all the cases we care about, the FOREIGN_FRAME bit is
++ * masked (e.g., pfn_to_mfn()) so behaviour there is correct.
++ */
++static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
++{
++ unsigned long pfn = mfn_to_pfn(mfn);
++ if ((pfn < end_pfn)
++ && !xen_feature(XENFEAT_auto_translated_physmap)
++ && (phys_to_machine_mapping[pfn] != mfn))
++ return end_pfn; /* force !pfn_valid() */
++ return pfn;
++}
++
++static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
++{
++ BUG_ON(end_pfn && pfn >= end_pfn);
++ if (xen_feature(XENFEAT_auto_translated_physmap)) {
++ BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY);
++ return;
++ }
++ phys_to_machine_mapping[pfn] = mfn;
++}
++
++static inline maddr_t phys_to_machine(paddr_t phys)
++{
++ maddr_t machine = pfn_to_mfn(phys >> PAGE_SHIFT);
++ machine = (machine << PAGE_SHIFT) | (phys & ~PAGE_MASK);
++ return machine;
++}
++
++static inline paddr_t machine_to_phys(maddr_t machine)
++{
++ paddr_t phys = mfn_to_pfn(machine >> PAGE_SHIFT);
++ phys = (phys << PAGE_SHIFT) | (machine & ~PAGE_MASK);
++ return phys;
++}
++
++static inline paddr_t pte_phys_to_machine(paddr_t phys)
++{
++ maddr_t machine;
++ machine = pfn_to_mfn((phys & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT);
++ machine = (machine << PAGE_SHIFT) | (phys & ~PHYSICAL_PAGE_MASK);
++ return machine;
++}
++
++static inline paddr_t pte_machine_to_phys(maddr_t machine)
++{
++ paddr_t phys;
++ phys = mfn_to_pfn((machine & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT);
++ phys = (phys << PAGE_SHIFT) | (machine & ~PHYSICAL_PAGE_MASK);
++ return phys;
++}
++
++#define __pte_ma(x) ((pte_t) { (x) } )
++#define pfn_pte_ma(pfn, prot) __pte_ma((((pfn) << PAGE_SHIFT) | pgprot_val(prot)) & __supported_pte_mask)
++
++#else /* !CONFIG_XEN */
++
++#define pfn_to_mfn(pfn) (pfn)
++#define mfn_to_pfn(mfn) (mfn)
++#define mfn_to_local_pfn(mfn) (mfn)
++#define set_phys_to_machine(pfn, mfn) ((void)0)
++#define phys_to_machine_mapping_valid(pfn) (1)
++#define phys_to_machine(phys) ((maddr_t)(phys))
++#define machine_to_phys(mach) ((paddr_t)(mach))
++#define pfn_pte_ma(pfn, prot) pfn_pte(pfn, prot)
++#define __pte_ma(x) __pte(x)
++
++#endif /* !CONFIG_XEN */
++
++/* VIRT <-> MACHINE conversion */
++#define virt_to_machine(v) (phys_to_machine(__pa(v)))
++#define virt_to_mfn(v) (pfn_to_mfn(__pa(v) >> PAGE_SHIFT))
++#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
++
++#endif /* _X86_64_MADDR_H */
++
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/mmu_context_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/mmu_context_64.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,136 @@
++#ifndef __X86_64_MMU_CONTEXT_H
++#define __X86_64_MMU_CONTEXT_H
++
++#include <asm/desc.h>
++#include <asm/atomic.h>
++#include <asm/pgalloc.h>
++#include <asm/page.h>
++#include <asm/pda.h>
++#include <asm/pgtable.h>
++#include <asm/tlbflush.h>
++
++/*
++ * possibly do the LDT unload here?
++ */
++int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
++void destroy_context(struct mm_struct *mm);
++
++static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
++{
++#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
++ if (read_pda(mmu_state) == TLBSTATE_OK)
++ write_pda(mmu_state, TLBSTATE_LAZY);
++#endif
++}
++
++#define prepare_arch_switch(next) __prepare_arch_switch()
++
++static inline void __prepare_arch_switch(void)
++{
++ /*
++ * Save away %es, %ds, %fs and %gs. Must happen before reload
++ * of cr3/ldt (i.e., not in __switch_to).
++ */
++ __asm__ __volatile__ (
++ "mov %%es,%0 ; mov %%ds,%1 ; mov %%fs,%2 ; mov %%gs,%3"
++ : "=m" (current->thread.es),
++ "=m" (current->thread.ds),
++ "=m" (current->thread.fsindex),
++ "=m" (current->thread.gsindex) );
++
++ if (current->thread.ds)
++ __asm__ __volatile__ ( "movl %0,%%ds" : : "r" (0) );
++
++ if (current->thread.es)
++ __asm__ __volatile__ ( "movl %0,%%es" : : "r" (0) );
++
++ if (current->thread.fsindex) {
++ __asm__ __volatile__ ( "movl %0,%%fs" : : "r" (0) );
++ current->thread.fs = 0;
++ }
++
++ if (current->thread.gsindex) {
++ load_gs_index(0);
++ current->thread.gs = 0;
++ }
++}
++
++extern void mm_pin(struct mm_struct *mm);
++extern void mm_unpin(struct mm_struct *mm);
++void mm_pin_all(void);
++
++static inline void load_cr3(pgd_t *pgd)
++{
++ asm volatile("movq %0,%%cr3" :: "r" (phys_to_machine(__pa(pgd))) :
++ "memory");
++}
++
++static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
++ struct task_struct *tsk)
++{
++ unsigned cpu = smp_processor_id();
++ struct mmuext_op _op[3], *op = _op;
++
++ if (likely(prev != next)) {
++ BUG_ON(!xen_feature(XENFEAT_writable_page_tables) &&
++ !next->context.pinned);
++
++ /* stop flush ipis for the previous mm */
++ cpu_clear(cpu, prev->cpu_vm_mask);
++#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
++ write_pda(mmu_state, TLBSTATE_OK);
++ write_pda(active_mm, next);
++#endif
++ cpu_set(cpu, next->cpu_vm_mask);
++
++ /* load_cr3(next->pgd) */
++ op->cmd = MMUEXT_NEW_BASEPTR;
++ op->arg1.mfn = pfn_to_mfn(__pa(next->pgd) >> PAGE_SHIFT);
++ op++;
++
++ /* xen_new_user_pt(__pa(__user_pgd(next->pgd))) */
++ op->cmd = MMUEXT_NEW_USER_BASEPTR;
++ op->arg1.mfn = pfn_to_mfn(__pa(__user_pgd(next->pgd)) >> PAGE_SHIFT);
++ op++;
++
++ if (unlikely(next->context.ldt != prev->context.ldt)) {
++ /* load_LDT_nolock(&next->context, cpu) */
++ op->cmd = MMUEXT_SET_LDT;
++ op->arg1.linear_addr = (unsigned long)next->context.ldt;
++ op->arg2.nr_ents = next->context.size;
++ op++;
++ }
++
++ BUG_ON(HYPERVISOR_mmuext_op(_op, op-_op, NULL, DOMID_SELF));
++ }
++#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
++ else {
++ write_pda(mmu_state, TLBSTATE_OK);
++ if (read_pda(active_mm) != next)
++ out_of_line_bug();
++ if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
++ /* We were in lazy tlb mode and leave_mm disabled
++ * tlb flush IPI delivery. We must reload CR3
++ * to make sure to use no freed page tables.
++ */
++ load_cr3(next->pgd);
++ xen_new_user_pt(__pa(__user_pgd(next->pgd)));
++ load_LDT_nolock(&next->context, cpu);
++ }
++ }
++#endif
++}
++
++#define deactivate_mm(tsk,mm) do { \
++ load_gs_index(0); \
++ asm volatile("movl %0,%%fs"::"r"(0)); \
++} while(0)
++
++static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
++{
++ if (!next->context.pinned)
++ mm_pin(next);
++ switch_mm(prev, next, NULL);
++}
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/page_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/page_64.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,212 @@
++#ifndef _X86_64_PAGE_H
++#define _X86_64_PAGE_H
++
++/* #include <linux/string.h> */
++#ifndef __ASSEMBLY__
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <asm/bug.h>
++#endif
++#include <xen/interface/xen.h>
++
++/*
++ * Need to repeat this here in order to not include pgtable.h (which in turn
++ * depends on definitions made here), but to be able to use the symbolic
++ * below. The preprocessor will warn if the two definitions aren't identical.
++ */
++#define _PAGE_PRESENT 0x001
++#define _PAGE_IO 0x200
++
++/* PAGE_SHIFT determines the page size */
++#define PAGE_SHIFT 12
++#ifdef __ASSEMBLY__
++#define PAGE_SIZE (0x1 << PAGE_SHIFT)
++#else
++#define PAGE_SIZE (1UL << PAGE_SHIFT)
++#endif
++#define PAGE_MASK (~(PAGE_SIZE-1))
++
++/* See Documentation/x86_64/mm.txt for a description of the memory map. */
++#define __PHYSICAL_MASK_SHIFT 46
++#define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
++#define __VIRTUAL_MASK_SHIFT 48
++#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
++
++#define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
++
++#define THREAD_ORDER 1
++#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
++#define CURRENT_MASK (~(THREAD_SIZE-1))
++
++#define EXCEPTION_STACK_ORDER 0
++#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
++
++#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
++#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
++
++#define IRQSTACK_ORDER 2
++#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
++
++#define STACKFAULT_STACK 1
++#define DOUBLEFAULT_STACK 2
++#define NMI_STACK 3
++#define DEBUG_STACK 4
++#define MCE_STACK 5
++#define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
++
++#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
++#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
++
++#define HPAGE_SHIFT PMD_SHIFT
++#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
++#define HPAGE_MASK (~(HPAGE_SIZE - 1))
++#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
++
++#ifdef __KERNEL__
++#ifndef __ASSEMBLY__
++
++extern unsigned long end_pfn;
++
++#include <asm/maddr.h>
++
++void clear_page(void *);
++void copy_page(void *, void *);
++
++#define clear_user_page(page, vaddr, pg) clear_page(page)
++#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
++
++#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
++#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
++
++/*
++ * These are used to make use of C type-checking..
++ */
++typedef struct { unsigned long pte; } pte_t;
++typedef struct { unsigned long pmd; } pmd_t;
++typedef struct { unsigned long pud; } pud_t;
++typedef struct { unsigned long pgd; } pgd_t;
++#define PTE_MASK PHYSICAL_PAGE_MASK
++
++typedef struct { unsigned long pgprot; } pgprot_t;
++
++#define __pte_val(x) ((x).pte)
++#define pte_val(x) ((__pte_val(x) & (_PAGE_PRESENT|_PAGE_IO)) \
++ == _PAGE_PRESENT ? \
++ pte_machine_to_phys(__pte_val(x)) : \
++ __pte_val(x))
++
++#define __pmd_val(x) ((x).pmd)
++static inline unsigned long pmd_val(pmd_t x)
++{
++ unsigned long ret = __pmd_val(x);
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (ret) ret = pte_machine_to_phys(ret) | _PAGE_PRESENT;
++#else
++ if (ret & _PAGE_PRESENT) ret = pte_machine_to_phys(ret);
++#endif
++ return ret;
++}
++
++#define __pud_val(x) ((x).pud)
++static inline unsigned long pud_val(pud_t x)
++{
++ unsigned long ret = __pud_val(x);
++ if (ret & _PAGE_PRESENT) ret = pte_machine_to_phys(ret);
++ return ret;
++}
++
++#define __pgd_val(x) ((x).pgd)
++static inline unsigned long pgd_val(pgd_t x)
++{
++ unsigned long ret = __pgd_val(x);
++ if (ret & _PAGE_PRESENT) ret = pte_machine_to_phys(ret);
++ return ret;
++}
++
++#define pgprot_val(x) ((x).pgprot)
++
++static inline pte_t __pte(unsigned long x)
++{
++ if ((x & (_PAGE_PRESENT|_PAGE_IO)) == _PAGE_PRESENT)
++ x = pte_phys_to_machine(x);
++ return ((pte_t) { (x) });
++}
++
++static inline pmd_t __pmd(unsigned long x)
++{
++ if (x & _PAGE_PRESENT) x = pte_phys_to_machine(x);
++ return ((pmd_t) { (x) });
++}
++
++static inline pud_t __pud(unsigned long x)
++{
++ if (x & _PAGE_PRESENT) x = pte_phys_to_machine(x);
++ return ((pud_t) { (x) });
++}
++
++static inline pgd_t __pgd(unsigned long x)
++{
++ if (x & _PAGE_PRESENT) x = pte_phys_to_machine(x);
++ return ((pgd_t) { (x) });
++}
++
++#define __pgprot(x) ((pgprot_t) { (x) } )
++
++#define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START)
++#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
++#define __START_KERNEL_map 0xffffffff80000000UL
++#define __PAGE_OFFSET 0xffff880000000000UL
++
++#else
++#define __PHYSICAL_START CONFIG_PHYSICAL_START
++#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
++#define __START_KERNEL_map 0xffffffff80000000
++#define __PAGE_OFFSET 0xffff880000000000
++#endif /* !__ASSEMBLY__ */
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++#undef LOAD_OFFSET
++#define LOAD_OFFSET 0
++#endif
++
++/* to align the pointer to the (next) page boundary */
++#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
++
++#define KERNEL_TEXT_SIZE (40UL*1024*1024)
++#define KERNEL_TEXT_START 0xffffffff80000000UL
++
++#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
++
++/* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
++ Otherwise you risk miscompilation. */
++#define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
++/* __pa_symbol should be used for C visible symbols.
++ This seems to be the official gcc blessed way to do such arithmetic. */
++#define __pa_symbol(x) \
++ ({unsigned long v; \
++ asm("" : "=r" (v) : "0" (x)); \
++ __pa(v); })
++
++#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
++#define __boot_va(x) __va(x)
++#define __boot_pa(x) __pa(x)
++#ifdef CONFIG_FLATMEM
++#define pfn_valid(pfn) ((pfn) < end_pfn)
++#endif
++
++#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
++#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
++#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
++
++#define VM_DATA_DEFAULT_FLAGS \
++ (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
++ VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
++
++#define __HAVE_ARCH_GATE_AREA 1
++
++#include <asm-generic/memory_model.h>
++#include <asm-generic/page.h>
++
++#endif /* __KERNEL__ */
++
++#endif /* _X86_64_PAGE_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pci_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pci_64.h 2007-09-14 11:14:51.000000000 +0200
+@@ -0,0 +1,168 @@
++#ifndef __x8664_PCI_H
++#define __x8664_PCI_H
++
++#include <asm/io.h>
++
++#ifdef __KERNEL__
++
++#include <linux/mm.h> /* for struct page */
++
++/* Can be used to override the logic in pci_scan_bus for skipping
++ already-configured bus numbers - to be used for buggy BIOSes
++ or architectures with incomplete PCI setup by the loader */
++
++#ifdef CONFIG_PCI
++extern unsigned int pcibios_assign_all_busses(void);
++#else
++#define pcibios_assign_all_busses() 0
++#endif
++
++#include <asm/hypervisor.h>
++#define pcibios_scan_all_fns(a, b) (!is_initial_xendomain())
++
++extern unsigned long pci_mem_start;
++#define PCIBIOS_MIN_IO 0x1000
++#define PCIBIOS_MIN_MEM (pci_mem_start)
++
++#define PCIBIOS_MIN_CARDBUS_IO 0x4000
++
++void pcibios_config_init(void);
++struct pci_bus * pcibios_scan_root(int bus);
++extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
++extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
++
++void pcibios_set_master(struct pci_dev *dev);
++void pcibios_penalize_isa_irq(int irq, int active);
++struct irq_routing_table *pcibios_get_irq_routing_table(void);
++int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
++
++#include <linux/types.h>
++#include <linux/slab.h>
++#include <asm/scatterlist.h>
++#include <linux/string.h>
++#include <asm/page.h>
++
++extern void pci_iommu_alloc(void);
++extern int iommu_setup(char *opt);
++
++/* The PCI address space does equal the physical memory
++ * address space. The networking and block device layers use
++ * this boolean for bounce buffer decisions
++ *
++ * On AMD64 it mostly equals, but we set it to zero if a hardware
++ * IOMMU (gart) of sotware IOMMU (swiotlb) is available.
++ */
++#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
++
++#if defined(CONFIG_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
++
++/*
++ * x86-64 always supports DAC, but sometimes it is useful to force
++ * devices through the IOMMU to get automatic sg list merging.
++ * Optional right now.
++ */
++extern int iommu_sac_force;
++#define pci_dac_dma_supported(pci_dev, mask) (!iommu_sac_force)
++
++#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
++ dma_addr_t ADDR_NAME;
++#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
++ __u32 LEN_NAME;
++#define pci_unmap_addr(PTR, ADDR_NAME) \
++ ((PTR)->ADDR_NAME)
++#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
++ (((PTR)->ADDR_NAME) = (VAL))
++#define pci_unmap_len(PTR, LEN_NAME) \
++ ((PTR)->LEN_NAME)
++#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
++ (((PTR)->LEN_NAME) = (VAL))
++
++#elif defined(CONFIG_SWIOTLB)
++
++#define pci_dac_dma_supported(pci_dev, mask) 1
++
++#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
++ dma_addr_t ADDR_NAME;
++#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
++ __u32 LEN_NAME;
++#define pci_unmap_addr(PTR, ADDR_NAME) \
++ ((PTR)->ADDR_NAME)
++#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
++ (((PTR)->ADDR_NAME) = (VAL))
++#define pci_unmap_len(PTR, LEN_NAME) \
++ ((PTR)->LEN_NAME)
++#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
++ (((PTR)->LEN_NAME) = (VAL))
++
++#else
++/* No IOMMU */
++
++#define pci_dac_dma_supported(pci_dev, mask) 1
++
++#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
++#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
++#define pci_unmap_addr(PTR, ADDR_NAME) (0)
++#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
++#define pci_unmap_len(PTR, LEN_NAME) (0)
++#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
++
++#endif
++
++#include <asm-generic/pci-dma-compat.h>
++
++static inline dma64_addr_t
++pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
++{
++ return ((dma64_addr_t) page_to_phys(page) +
++ (dma64_addr_t) offset);
++}
++
++static inline struct page *
++pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
++{
++ return virt_to_page(__va(dma_addr));
++}
++
++static inline unsigned long
++pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
++{
++ return (dma_addr & ~PAGE_MASK);
++}
++
++static inline void
++pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
++{
++}
++
++static inline void
++pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
++{
++ flush_write_buffers();
++}
++
++#ifdef CONFIG_PCI
++static inline void pci_dma_burst_advice(struct pci_dev *pdev,
++ enum pci_dma_burst_strategy *strat,
++ unsigned long *strategy_parameter)
++{
++ *strat = PCI_DMA_BURST_INFINITY;
++ *strategy_parameter = ~0UL;
++}
++#endif
++
++#define HAVE_PCI_MMAP
++extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
++ enum pci_mmap_state mmap_state, int write_combine);
++
++static inline void pcibios_add_platform_entries(struct pci_dev *dev)
++{
++}
++
++#endif /* __KERNEL__ */
++
++/* generic pci stuff */
++#ifdef CONFIG_PCI
++#include <asm-generic/pci.h>
++#endif
++
++#endif /* __x8664_PCI_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pgalloc_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pgalloc_64.h 2007-06-18 08:38:13.000000000 +0200
+@@ -0,0 +1,204 @@
++#ifndef _X86_64_PGALLOC_H
++#define _X86_64_PGALLOC_H
++
++#include <asm/fixmap.h>
++#include <asm/pda.h>
++#include <linux/threads.h>
++#include <linux/mm.h>
++#include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
++
++#include <xen/features.h>
++void make_page_readonly(void *va, unsigned int feature);
++void make_page_writable(void *va, unsigned int feature);
++void make_pages_readonly(void *va, unsigned int nr, unsigned int feature);
++void make_pages_writable(void *va, unsigned int nr, unsigned int feature);
++
++#define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
++
++static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
++{
++ set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)));
++}
++
++static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
++{
++ if (unlikely((mm)->context.pinned)) {
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)__va(page_to_pfn(pte) << PAGE_SHIFT),
++ pfn_pte(page_to_pfn(pte), PAGE_KERNEL_RO), 0));
++ set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
++ } else {
++ *(pmd) = __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT));
++ }
++}
++
++static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
++{
++ if (unlikely((mm)->context.pinned)) {
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)pmd,
++ pfn_pte(virt_to_phys(pmd)>>PAGE_SHIFT,
++ PAGE_KERNEL_RO), 0));
++ set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
++ } else {
++ *(pud) = __pud(_PAGE_TABLE | __pa(pmd));
++ }
++}
++
++/*
++ * We need to use the batch mode here, but pgd_pupulate() won't be
++ * be called frequently.
++ */
++static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
++{
++ if (unlikely((mm)->context.pinned)) {
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)pud,
++ pfn_pte(virt_to_phys(pud)>>PAGE_SHIFT,
++ PAGE_KERNEL_RO), 0));
++ set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
++ set_pgd(__user_pgd(pgd), __pgd(_PAGE_TABLE | __pa(pud)));
++ } else {
++ *(pgd) = __pgd(_PAGE_TABLE | __pa(pud));
++ *(__user_pgd(pgd)) = *(pgd);
++ }
++}
++
++extern struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr);
++extern void pte_free(struct page *pte);
++
++static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
++{
++ struct page *pg;
++
++ pg = pte_alloc_one(mm, addr);
++ return pg ? page_address(pg) : NULL;
++}
++
++static inline void pmd_free(pmd_t *pmd)
++{
++ BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
++ pte_free(virt_to_page(pmd));
++}
++
++static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
++{
++ struct page *pg;
++
++ pg = pte_alloc_one(mm, addr);
++ return pg ? page_address(pg) : NULL;
++}
++
++static inline void pud_free(pud_t *pud)
++{
++ BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
++ pte_free(virt_to_page(pud));
++}
++
++static inline void pgd_list_add(pgd_t *pgd)
++{
++ struct page *page = virt_to_page(pgd);
++
++ spin_lock(&pgd_lock);
++ page->index = (pgoff_t)pgd_list;
++ if (pgd_list)
++ pgd_list->private = (unsigned long)&page->index;
++ pgd_list = page;
++ page->private = (unsigned long)&pgd_list;
++ spin_unlock(&pgd_lock);
++}
++
++static inline void pgd_list_del(pgd_t *pgd)
++{
++ struct page *next, **pprev, *page = virt_to_page(pgd);
++
++ spin_lock(&pgd_lock);
++ next = (struct page *)page->index;
++ pprev = (struct page **)page->private;
++ *pprev = next;
++ if (next)
++ next->private = (unsigned long)pprev;
++ spin_unlock(&pgd_lock);
++}
++
++static inline pgd_t *pgd_alloc(struct mm_struct *mm)
++{
++ /*
++ * We allocate two contiguous pages for kernel and user.
++ */
++ unsigned boundary;
++ pgd_t *pgd = (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_REPEAT, 1);
++ if (!pgd)
++ return NULL;
++ pgd_list_add(pgd);
++ /*
++ * Copy kernel pointers in from init.
++ * Could keep a freelist or slab cache of those because the kernel
++ * part never changes.
++ */
++ boundary = pgd_index(__PAGE_OFFSET);
++ memset(pgd, 0, boundary * sizeof(pgd_t));
++ memcpy(pgd + boundary,
++ init_level4_pgt + boundary,
++ (PTRS_PER_PGD - boundary) * sizeof(pgd_t));
++
++ memset(__user_pgd(pgd), 0, PAGE_SIZE); /* clean up user pgd */
++ /*
++ * Set level3_user_pgt for vsyscall area
++ */
++ __user_pgd(pgd)[pgd_index(VSYSCALL_START)] =
++ __pgd(__pa_symbol(level3_user_pgt) | _PAGE_TABLE);
++ return pgd;
++}
++
++static inline void pgd_free(pgd_t *pgd)
++{
++ pte_t *ptep = virt_to_ptep(pgd);
++
++ if (!pte_write(*ptep)) {
++ xen_pgd_unpin(__pa(pgd));
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)pgd,
++ pfn_pte(virt_to_phys(pgd)>>PAGE_SHIFT, PAGE_KERNEL),
++ 0));
++ }
++
++ ptep = virt_to_ptep(__user_pgd(pgd));
++
++ if (!pte_write(*ptep)) {
++ xen_pgd_unpin(__pa(__user_pgd(pgd)));
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)__user_pgd(pgd),
++ pfn_pte(virt_to_phys(__user_pgd(pgd))>>PAGE_SHIFT,
++ PAGE_KERNEL),
++ 0));
++ }
++
++ pgd_list_del(pgd);
++ free_pages((unsigned long)pgd, 1);
++}
++
++static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
++{
++ pte_t *pte = (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
++ if (pte)
++ make_page_readonly(pte, XENFEAT_writable_page_tables);
++
++ return pte;
++}
++
++/* Should really implement gc for free page table pages. This could be
++ done with a reference count in struct page. */
++
++static inline void pte_free_kernel(pte_t *pte)
++{
++ BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
++ make_page_writable(pte, XENFEAT_writable_page_tables);
++ free_page((unsigned long)pte);
++}
++
++#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
++#define __pmd_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
++#define __pud_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
++
++#endif /* _X86_64_PGALLOC_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,583 @@
++#ifndef _X86_64_PGTABLE_H
++#define _X86_64_PGTABLE_H
++
++/*
++ * This file contains the functions and defines necessary to modify and use
++ * the x86-64 page table tree.
++ */
++#include <asm/processor.h>
++#include <asm/fixmap.h>
++#include <asm/bitops.h>
++#include <linux/threads.h>
++#include <linux/sched.h>
++#include <asm/pda.h>
++#ifdef CONFIG_XEN
++#include <asm/hypervisor.h>
++
++extern pud_t level3_user_pgt[512];
++
++extern void xen_init_pt(void);
++
++extern pte_t *lookup_address(unsigned long address);
++
++#define virt_to_ptep(va) \
++({ \
++ pte_t *__ptep = lookup_address((unsigned long)(va)); \
++ BUG_ON(!__ptep || !pte_present(*__ptep)); \
++ __ptep; \
++})
++
++#define arbitrary_virt_to_machine(va) \
++ (((maddr_t)pte_mfn(*virt_to_ptep(va)) << PAGE_SHIFT) \
++ | ((unsigned long)(va) & (PAGE_SIZE - 1)))
++#endif
++
++extern pud_t level3_kernel_pgt[512];
++extern pud_t level3_physmem_pgt[512];
++extern pud_t level3_ident_pgt[512];
++extern pmd_t level2_kernel_pgt[512];
++extern pgd_t init_level4_pgt[];
++extern pgd_t boot_level4_pgt[];
++extern unsigned long __supported_pte_mask;
++
++#define swapper_pg_dir init_level4_pgt
++
++extern int nonx_setup(char *str);
++extern void paging_init(void);
++extern void clear_kernel_mapping(unsigned long addr, unsigned long size);
++
++extern unsigned long pgkern_mask;
++
++/*
++ * ZERO_PAGE is a global shared page that is always zero: used
++ * for zero-mapped memory areas etc..
++ */
++extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
++#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
++
++/*
++ * PGDIR_SHIFT determines what a top-level page table entry can map
++ */
++#define PGDIR_SHIFT 39
++#define PTRS_PER_PGD 512
++
++/*
++ * 3rd level page
++ */
++#define PUD_SHIFT 30
++#define PTRS_PER_PUD 512
++
++/*
++ * PMD_SHIFT determines the size of the area a middle-level
++ * page table can map
++ */
++#define PMD_SHIFT 21
++#define PTRS_PER_PMD 512
++
++/*
++ * entries per page directory level
++ */
++#define PTRS_PER_PTE 512
++
++#define pte_ERROR(e) \
++ printk("%s:%d: bad pte %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
++ &(e), __pte_val(e), pte_pfn(e))
++#define pmd_ERROR(e) \
++ printk("%s:%d: bad pmd %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
++ &(e), __pmd_val(e), pmd_pfn(e))
++#define pud_ERROR(e) \
++ printk("%s:%d: bad pud %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
++ &(e), __pud_val(e), (pud_val(e) & __PHYSICAL_MASK) >> PAGE_SHIFT)
++#define pgd_ERROR(e) \
++ printk("%s:%d: bad pgd %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
++ &(e), __pgd_val(e), (pgd_val(e) & __PHYSICAL_MASK) >> PAGE_SHIFT)
++
++#define pgd_none(x) (!__pgd_val(x))
++#define pud_none(x) (!__pud_val(x))
++
++static inline void set_pte(pte_t *dst, pte_t val)
++{
++ *dst = val;
++}
++
++#define set_pmd(pmdptr, pmdval) xen_l2_entry_update(pmdptr, (pmdval))
++#define set_pud(pudptr, pudval) xen_l3_entry_update(pudptr, (pudval))
++#define set_pgd(pgdptr, pgdval) xen_l4_entry_update(pgdptr, (pgdval))
++
++static inline void pud_clear (pud_t * pud)
++{
++ set_pud(pud, __pud(0));
++}
++
++#define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
++
++static inline void pgd_clear (pgd_t * pgd)
++{
++ set_pgd(pgd, __pgd(0));
++ set_pgd(__user_pgd(pgd), __pgd(0));
++}
++
++#define pud_page(pud) \
++ ((unsigned long) __va(pud_val(pud) & PHYSICAL_PAGE_MASK))
++
++#define pte_same(a, b) ((a).pte == (b).pte)
++
++#define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK))
++
++#define PMD_SIZE (1UL << PMD_SHIFT)
++#define PMD_MASK (~(PMD_SIZE-1))
++#define PUD_SIZE (1UL << PUD_SHIFT)
++#define PUD_MASK (~(PUD_SIZE-1))
++#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
++#define PGDIR_MASK (~(PGDIR_SIZE-1))
++
++#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
++#define FIRST_USER_ADDRESS 0
++
++#ifndef __ASSEMBLY__
++#define MAXMEM 0x3fffffffffffUL
++#define VMALLOC_START 0xffffc20000000000UL
++#define VMALLOC_END 0xffffe1ffffffffffUL
++#define MODULES_VADDR 0xffffffff88000000UL
++#define MODULES_END 0xfffffffffff00000UL
++#define MODULES_LEN (MODULES_END - MODULES_VADDR)
++
++#define _PAGE_BIT_PRESENT 0
++#define _PAGE_BIT_RW 1
++#define _PAGE_BIT_USER 2
++#define _PAGE_BIT_PWT 3
++#define _PAGE_BIT_PCD 4
++#define _PAGE_BIT_ACCESSED 5
++#define _PAGE_BIT_DIRTY 6
++#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
++#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
++#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
++
++#define _PAGE_PRESENT 0x001
++#define _PAGE_RW 0x002
++#define _PAGE_USER 0x004
++#define _PAGE_PWT 0x008
++#define _PAGE_PCD 0x010
++#define _PAGE_ACCESSED 0x020
++#define _PAGE_DIRTY 0x040
++#define _PAGE_PSE 0x080 /* 2MB page */
++#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */
++#define _PAGE_GLOBAL 0x100 /* Global TLB entry */
++
++#define _PAGE_PROTNONE 0x080 /* If not present */
++#define _PAGE_NX (1UL<<_PAGE_BIT_NX)
++
++/* Mapped page is I/O or foreign and has no associated page struct. */
++#define _PAGE_IO 0x200
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++extern unsigned int __kernel_page_user;
++#else
++#define __kernel_page_user 0
++#endif
++
++#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
++#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY | __kernel_page_user)
++
++#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_IO)
++
++#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
++#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_COPY PAGE_COPY_NOEXEC
++#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++#define __PAGE_KERNEL \
++ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX | __kernel_page_user)
++#define __PAGE_KERNEL_EXEC \
++ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | __kernel_page_user)
++#define __PAGE_KERNEL_NOCACHE \
++ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_PCD | _PAGE_ACCESSED | _PAGE_NX | __kernel_page_user)
++#define __PAGE_KERNEL_RO \
++ (_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX | __kernel_page_user)
++#define __PAGE_KERNEL_VSYSCALL \
++ (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++#define __PAGE_KERNEL_VSYSCALL_NOCACHE \
++ (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_PCD)
++#define __PAGE_KERNEL_LARGE \
++ (__PAGE_KERNEL | _PAGE_PSE)
++#define __PAGE_KERNEL_LARGE_EXEC \
++ (__PAGE_KERNEL_EXEC | _PAGE_PSE)
++
++/*
++ * We don't support GLOBAL page in xenolinux64
++ */
++#define MAKE_GLOBAL(x) __pgprot((x))
++
++#define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL)
++#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
++#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
++#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
++#define PAGE_KERNEL_VSYSCALL32 __pgprot(__PAGE_KERNEL_VSYSCALL)
++#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
++#define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE)
++#define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE)
++
++/* xwr */
++#define __P000 PAGE_NONE
++#define __P001 PAGE_READONLY
++#define __P010 PAGE_COPY
++#define __P011 PAGE_COPY
++#define __P100 PAGE_READONLY_EXEC
++#define __P101 PAGE_READONLY_EXEC
++#define __P110 PAGE_COPY_EXEC
++#define __P111 PAGE_COPY_EXEC
++
++#define __S000 PAGE_NONE
++#define __S001 PAGE_READONLY
++#define __S010 PAGE_SHARED
++#define __S011 PAGE_SHARED
++#define __S100 PAGE_READONLY_EXEC
++#define __S101 PAGE_READONLY_EXEC
++#define __S110 PAGE_SHARED_EXEC
++#define __S111 PAGE_SHARED_EXEC
++
++static inline unsigned long pgd_bad(pgd_t pgd)
++{
++ unsigned long val = __pgd_val(pgd);
++ val &= ~PTE_MASK;
++ val &= ~(_PAGE_USER | _PAGE_DIRTY);
++ return val & ~(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED);
++}
++
++static inline unsigned long pud_bad(pud_t pud)
++{
++ unsigned long val = __pud_val(pud);
++ val &= ~PTE_MASK;
++ val &= ~(_PAGE_USER | _PAGE_DIRTY);
++ return val & ~(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED);
++}
++
++#define set_pte_at(_mm,addr,ptep,pteval) do { \
++ if (((_mm) != current->mm && (_mm) != &init_mm) || \
++ HYPERVISOR_update_va_mapping((addr), (pteval), 0)) \
++ set_pte((ptep), (pteval)); \
++} while (0)
++
++#define pte_none(x) (!(x).pte)
++#define pte_present(x) ((x).pte & (_PAGE_PRESENT | _PAGE_PROTNONE))
++#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
++
++#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
++
++#define __pte_mfn(_pte) (((_pte).pte & PTE_MASK) >> PAGE_SHIFT)
++#define pte_mfn(_pte) ((_pte).pte & _PAGE_PRESENT ? \
++ __pte_mfn(_pte) : pfn_to_mfn(__pte_mfn(_pte)))
++#define pte_pfn(_pte) ((_pte).pte & _PAGE_IO ? end_pfn : \
++ (_pte).pte & _PAGE_PRESENT ? \
++ mfn_to_local_pfn(__pte_mfn(_pte)) : \
++ __pte_mfn(_pte))
++
++#define pte_page(x) pfn_to_page(pte_pfn(x))
++
++static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
++{
++ unsigned long pte = page_nr << PAGE_SHIFT;
++ pte |= pgprot_val(pgprot);
++ pte &= __supported_pte_mask;
++ return __pte(pte);
++}
++
++static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ pte_t pte = *ptep;
++ if (!pte_none(pte)) {
++ if ((mm != &init_mm) ||
++ HYPERVISOR_update_va_mapping(addr, __pte(0), 0))
++ pte = __pte_ma(xchg(&ptep->pte, 0));
++ }
++ return pte;
++}
++
++static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
++{
++ if (full) {
++ pte_t pte = *ptep;
++ if (mm->context.pinned)
++ xen_l1_entry_update(ptep, __pte(0));
++ else
++ *ptep = __pte(0);
++ return pte;
++ }
++ return ptep_get_and_clear(mm, addr, ptep);
++}
++
++#define ptep_clear_flush(vma, addr, ptep) \
++({ \
++ pte_t *__ptep = (ptep); \
++ pte_t __res = *__ptep; \
++ if (!pte_none(__res) && \
++ ((vma)->vm_mm != current->mm || \
++ HYPERVISOR_update_va_mapping(addr, __pte(0), \
++ (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
++ UVMF_INVLPG|UVMF_MULTI))) { \
++ __ptep->pte = 0; \
++ flush_tlb_page(vma, addr); \
++ } \
++ __res; \
++})
++
++/*
++ * The following only work if pte_present() is true.
++ * Undefined behaviour if not..
++ */
++#define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT)
++static inline int pte_user(pte_t pte) { return __pte_val(pte) & _PAGE_USER; }
++static inline int pte_read(pte_t pte) { return __pte_val(pte) & _PAGE_USER; }
++static inline int pte_exec(pte_t pte) { return __pte_val(pte) & _PAGE_USER; }
++static inline int pte_dirty(pte_t pte) { return __pte_val(pte) & _PAGE_DIRTY; }
++static inline int pte_young(pte_t pte) { return __pte_val(pte) & _PAGE_ACCESSED; }
++static inline int pte_write(pte_t pte) { return __pte_val(pte) & _PAGE_RW; }
++static inline int pte_file(pte_t pte) { return __pte_val(pte) & _PAGE_FILE; }
++static inline int pte_huge(pte_t pte) { return __pte_val(pte) & _PAGE_PSE; }
++
++static inline pte_t pte_rdprotect(pte_t pte) { __pte_val(pte) &= ~_PAGE_USER; return pte; }
++static inline pte_t pte_exprotect(pte_t pte) { __pte_val(pte) &= ~_PAGE_USER; return pte; }
++static inline pte_t pte_mkclean(pte_t pte) { __pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
++static inline pte_t pte_mkold(pte_t pte) { __pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
++static inline pte_t pte_wrprotect(pte_t pte) { __pte_val(pte) &= ~_PAGE_RW; return pte; }
++static inline pte_t pte_mkread(pte_t pte) { __pte_val(pte) |= _PAGE_USER; return pte; }
++static inline pte_t pte_mkexec(pte_t pte) { __pte_val(pte) |= _PAGE_USER; return pte; }
++static inline pte_t pte_mkdirty(pte_t pte) { __pte_val(pte) |= _PAGE_DIRTY; return pte; }
++static inline pte_t pte_mkyoung(pte_t pte) { __pte_val(pte) |= _PAGE_ACCESSED; return pte; }
++static inline pte_t pte_mkwrite(pte_t pte) { __pte_val(pte) |= _PAGE_RW; return pte; }
++static inline pte_t pte_mkhuge(pte_t pte) { __pte_val(pte) |= _PAGE_PSE; return pte; }
++
++#define ptep_test_and_clear_dirty(vma, addr, ptep) \
++({ \
++ pte_t __pte = *(ptep); \
++ int __ret = pte_dirty(__pte); \
++ if (__ret) \
++ set_pte_at((vma)->vm_mm, addr, ptep, pte_mkclean(__pte)); \
++ __ret; \
++})
++
++#define ptep_test_and_clear_young(vma, addr, ptep) \
++({ \
++ pte_t __pte = *(ptep); \
++ int __ret = pte_young(__pte); \
++ if (__ret) \
++ set_pte_at((vma)->vm_mm, addr, ptep, pte_mkold(__pte)); \
++ __ret; \
++})
++
++static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ pte_t pte = *ptep;
++ if (pte_write(pte))
++ set_pte_at(mm, addr, ptep, pte_wrprotect(pte));
++}
++
++/*
++ * Macro to mark a page protection value as "uncacheable".
++ */
++#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT))
++
++static inline int pmd_large(pmd_t pte) {
++ return (__pmd_val(pte) & __LARGE_PTE) == __LARGE_PTE;
++}
++
++
++/*
++ * Conversion functions: convert a page and protection to a page entry,
++ * and a page entry and page directory to the page they refer to.
++ */
++
++/*
++ * Level 4 access.
++ * Never use these in the common code.
++ */
++#define pgd_page(pgd) ((unsigned long) __va(pgd_val(pgd) & PTE_MASK))
++#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
++#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
++#define pgd_offset_k(address) (init_level4_pgt + pgd_index(address))
++#define pgd_present(pgd) (__pgd_val(pgd) & _PAGE_PRESENT)
++#define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
++
++/* PUD - Level3 access */
++/* to find an entry in a page-table-directory. */
++#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
++#define pud_offset(pgd, address) ((pud_t *) pgd_page(*(pgd)) + pud_index(address))
++#define pud_present(pud) (__pud_val(pud) & _PAGE_PRESENT)
++
++/* PMD - Level 2 access */
++#define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK))
++#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
++
++#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
++#define pmd_offset(dir, address) ((pmd_t *) pud_page(*(dir)) + \
++ pmd_index(address))
++#define pmd_none(x) (!__pmd_val(x))
++#if CONFIG_XEN_COMPAT <= 0x030002
++/* pmd_present doesn't just test the _PAGE_PRESENT bit since wr.p.t.
++ can temporarily clear it. */
++#define pmd_present(x) (__pmd_val(x))
++#else
++#define pmd_present(x) (__pmd_val(x) & _PAGE_PRESENT)
++#endif
++#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
++#define pmd_bad(x) ((__pmd_val(x) & ~(PTE_MASK | _PAGE_USER | _PAGE_PRESENT)) \
++ != (_KERNPG_TABLE & ~(_PAGE_USER | _PAGE_PRESENT)))
++#define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot)))
++#define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)
++
++#define pte_to_pgoff(pte) ((__pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
++#define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE })
++#define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT
++
++/* PTE - Level 1 access. */
++
++/* page, protection -> pte */
++#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
++#define mk_pte_huge(entry) (__pte_val(entry) |= _PAGE_PRESENT | _PAGE_PSE)
++
++/* physical address -> PTE */
++static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot)
++{
++ unsigned long pteval;
++ pteval = physpage | pgprot_val(pgprot);
++ return __pte(pteval);
++}
++
++/* Change flags of a PTE */
++static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
++{
++ /*
++ * Since this might change the present bit (which controls whether
++ * a pte_t object has undergone p2m translation), we must use
++ * pte_val() on the input pte and __pte() for the return value.
++ */
++ unsigned long pteval = pte_val(pte);
++
++ pteval &= _PAGE_CHG_MASK;
++ pteval |= pgprot_val(newprot);
++ pteval &= __supported_pte_mask;
++ return __pte(pteval);
++}
++
++#define pte_index(address) \
++ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
++#define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_kernel(*(dir)) + \
++ pte_index(address))
++
++/* x86-64 always has all page tables mapped. */
++#define pte_offset_map(dir,address) pte_offset_kernel(dir,address)
++#define pte_offset_map_nested(dir,address) pte_offset_kernel(dir,address)
++#define pte_unmap(pte) /* NOP */
++#define pte_unmap_nested(pte) /* NOP */
++
++#define update_mmu_cache(vma,address,pte) do { } while (0)
++
++/*
++ * Rules for using ptep_establish: the pte MUST be a user pte, and
++ * must be a present->present transition.
++ */
++#define __HAVE_ARCH_PTEP_ESTABLISH
++#define ptep_establish(vma, address, ptep, pteval) \
++ do { \
++ if ( likely((vma)->vm_mm == current->mm) ) { \
++ BUG_ON(HYPERVISOR_update_va_mapping(address, \
++ pteval, \
++ (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
++ UVMF_INVLPG|UVMF_MULTI)); \
++ } else { \
++ xen_l1_entry_update(ptep, pteval); \
++ flush_tlb_page(vma, address); \
++ } \
++ } while (0)
++
++/* We only update the dirty/accessed state if we set
++ * the dirty bit by hand in the kernel, since the hardware
++ * will do the accessed bit for us, and we don't want to
++ * race with other CPU's that might be updating the dirty
++ * bit at the same time. */
++#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
++#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
++ do { \
++ if (dirty) \
++ ptep_establish(vma, address, ptep, entry); \
++ } while (0)
++
++/* Encode and de-code a swap entry */
++#define __swp_type(x) (((x).val >> 1) & 0x3f)
++#define __swp_offset(x) ((x).val >> 8)
++#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
++#define __pte_to_swp_entry(pte) ((swp_entry_t) { __pte_val(pte) })
++#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
++
++extern spinlock_t pgd_lock;
++extern struct page *pgd_list;
++void vmalloc_sync_all(void);
++
++#endif /* !__ASSEMBLY__ */
++
++extern int kern_addr_valid(unsigned long addr);
++
++#define DOMID_LOCAL (0xFFFFU)
++
++struct vm_area_struct;
++
++int direct_remap_pfn_range(struct vm_area_struct *vma,
++ unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid);
++
++int direct_kernel_remap_pfn_range(unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid);
++
++int create_lookup_pte_addr(struct mm_struct *mm,
++ unsigned long address,
++ uint64_t *ptep);
++
++int touch_pte_range(struct mm_struct *mm,
++ unsigned long address,
++ unsigned long size);
++
++int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
++ unsigned long addr, unsigned long end, pgprot_t newprot);
++
++#define arch_change_pte_range(mm, pmd, addr, end, newprot) \
++ xen_change_pte_range(mm, pmd, addr, end, newprot)
++
++#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
++ direct_remap_pfn_range(vma,vaddr,pfn,size,prot,DOMID_IO)
++
++#define MK_IOSPACE_PFN(space, pfn) (pfn)
++#define GET_IOSPACE(pfn) 0
++#define GET_PFN(pfn) (pfn)
++
++#define HAVE_ARCH_UNMAPPED_AREA
++
++#define pgtable_cache_init() do { } while (0)
++#define check_pgt_cache() do { } while (0)
++
++#define PAGE_AGP PAGE_KERNEL_NOCACHE
++#define HAVE_PAGE_AGP 1
++
++/* fs/proc/kcore.c */
++#define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK)
++#define kc_offset_to_vaddr(o) \
++ (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))
++
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
++#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
++#define __HAVE_ARCH_PTEP_SET_WRPROTECT
++#define __HAVE_ARCH_PTE_SAME
++#include <asm-generic/pgtable.h>
++
++#endif /* _X86_64_PGTABLE_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/processor_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/processor_64.h 2008-03-06 08:54:32.000000000 +0100
+@@ -0,0 +1,502 @@
++/*
++ * include/asm-x86_64/processor.h
++ *
++ * Copyright (C) 1994 Linus Torvalds
++ */
++
++#ifndef __ASM_X86_64_PROCESSOR_H
++#define __ASM_X86_64_PROCESSOR_H
++
++#include <asm/segment.h>
++#include <asm/page.h>
++#include <asm/types.h>
++#include <asm/sigcontext.h>
++#include <asm/cpufeature.h>
++#include <linux/threads.h>
++#include <asm/msr.h>
++#include <asm/current.h>
++#include <asm/system.h>
++#include <asm/mmsegment.h>
++#include <asm/percpu.h>
++#include <linux/personality.h>
++#include <linux/cpumask.h>
++
++#define TF_MASK 0x00000100
++#define IF_MASK 0x00000200
++#define IOPL_MASK 0x00003000
++#define NT_MASK 0x00004000
++#define VM_MASK 0x00020000
++#define AC_MASK 0x00040000
++#define VIF_MASK 0x00080000 /* virtual interrupt flag */
++#define VIP_MASK 0x00100000 /* virtual interrupt pending */
++#define ID_MASK 0x00200000
++
++#define desc_empty(desc) \
++ (!((desc)->a | (desc)->b))
++
++#define desc_equal(desc1, desc2) \
++ (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
++
++/*
++ * Default implementation of macro that returns current
++ * instruction pointer ("program counter").
++ */
++#define current_text_addr() ({ void *pc; asm volatile("leaq 1f(%%rip),%0\n1:":"=r"(pc)); pc; })
++
++/*
++ * CPU type and hardware bug flags. Kept separately for each CPU.
++ */
++
++struct cpuinfo_x86 {
++ __u8 x86; /* CPU family */
++ __u8 x86_vendor; /* CPU vendor */
++ __u8 x86_model;
++ __u8 x86_mask;
++ int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */
++ __u32 x86_capability[NCAPINTS];
++ char x86_vendor_id[16];
++ char x86_model_id[64];
++ int x86_cache_size; /* in KB */
++ int x86_clflush_size;
++ int x86_cache_alignment;
++ int x86_tlbsize; /* number of 4K pages in DTLB/ITLB combined(in pages)*/
++ __u8 x86_virt_bits, x86_phys_bits;
++ __u8 x86_max_cores; /* cpuid returned max cores value */
++ __u32 x86_power;
++ __u32 extended_cpuid_level; /* Max extended CPUID function supported */
++ unsigned long loops_per_jiffy;
++#ifdef CONFIG_SMP
++ cpumask_t llc_shared_map; /* cpus sharing the last level cache */
++#endif
++ __u8 apicid;
++#ifdef CONFIG_SMP
++ __u8 booted_cores; /* number of cores as seen by OS */
++ __u8 phys_proc_id; /* Physical Processor id. */
++ __u8 cpu_core_id; /* Core id. */
++#endif
++} ____cacheline_aligned;
++
++#define X86_VENDOR_INTEL 0
++#define X86_VENDOR_CYRIX 1
++#define X86_VENDOR_AMD 2
++#define X86_VENDOR_UMC 3
++#define X86_VENDOR_NEXGEN 4
++#define X86_VENDOR_CENTAUR 5
++#define X86_VENDOR_RISE 6
++#define X86_VENDOR_TRANSMETA 7
++#define X86_VENDOR_NUM 8
++#define X86_VENDOR_UNKNOWN 0xff
++
++#ifdef CONFIG_SMP
++extern struct cpuinfo_x86 cpu_data[];
++#define current_cpu_data cpu_data[smp_processor_id()]
++#else
++#define cpu_data (&boot_cpu_data)
++#define current_cpu_data boot_cpu_data
++#endif
++
++extern char ignore_irq13;
++
++extern void identify_cpu(struct cpuinfo_x86 *);
++extern void print_cpu_info(struct cpuinfo_x86 *);
++extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
++extern unsigned short num_cache_leaves;
++
++/*
++ * EFLAGS bits
++ */
++#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */
++#define X86_EFLAGS_PF 0x00000004 /* Parity Flag */
++#define X86_EFLAGS_AF 0x00000010 /* Auxillary carry Flag */
++#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */
++#define X86_EFLAGS_SF 0x00000080 /* Sign Flag */
++#define X86_EFLAGS_TF 0x00000100 /* Trap Flag */
++#define X86_EFLAGS_IF 0x00000200 /* Interrupt Flag */
++#define X86_EFLAGS_DF 0x00000400 /* Direction Flag */
++#define X86_EFLAGS_OF 0x00000800 /* Overflow Flag */
++#define X86_EFLAGS_IOPL 0x00003000 /* IOPL mask */
++#define X86_EFLAGS_NT 0x00004000 /* Nested Task */
++#define X86_EFLAGS_RF 0x00010000 /* Resume Flag */
++#define X86_EFLAGS_VM 0x00020000 /* Virtual Mode */
++#define X86_EFLAGS_AC 0x00040000 /* Alignment Check */
++#define X86_EFLAGS_VIF 0x00080000 /* Virtual Interrupt Flag */
++#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
++#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
++
++/*
++ * Intel CPU features in CR4
++ */
++#define X86_CR4_VME 0x0001 /* enable vm86 extensions */
++#define X86_CR4_PVI 0x0002 /* virtual interrupts flag enable */
++#define X86_CR4_TSD 0x0004 /* disable time stamp at ipl 3 */
++#define X86_CR4_DE 0x0008 /* enable debugging extensions */
++#define X86_CR4_PSE 0x0010 /* enable page size extensions */
++#define X86_CR4_PAE 0x0020 /* enable physical address extensions */
++#define X86_CR4_MCE 0x0040 /* Machine check enable */
++#define X86_CR4_PGE 0x0080 /* enable global pages */
++#define X86_CR4_PCE 0x0100 /* enable performance counters at ipl 3 */
++#define X86_CR4_OSFXSR 0x0200 /* enable fast FPU save and restore */
++#define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */
++
++/*
++ * Save the cr4 feature set we're using (ie
++ * Pentium 4MB enable and PPro Global page
++ * enable), so that any CPU's that boot up
++ * after us can get the correct flags.
++ */
++extern unsigned long mmu_cr4_features;
++
++static inline void set_in_cr4 (unsigned long mask)
++{
++ mmu_cr4_features |= mask;
++ __asm__("movq %%cr4,%%rax\n\t"
++ "orq %0,%%rax\n\t"
++ "movq %%rax,%%cr4\n"
++ : : "irg" (mask)
++ :"ax");
++}
++
++static inline void clear_in_cr4 (unsigned long mask)
++{
++ mmu_cr4_features &= ~mask;
++ __asm__("movq %%cr4,%%rax\n\t"
++ "andq %0,%%rax\n\t"
++ "movq %%rax,%%cr4\n"
++ : : "irg" (~mask)
++ :"ax");
++}
++
++
++/*
++ * User space process size. 47bits minus one guard page.
++ */
++#define TASK_SIZE64 (0x800000000000UL - 4096)
++
++/* This decides where the kernel will search for a free chunk of vm
++ * space during mmap's.
++ */
++#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000)
++
++#define TASK_SIZE (test_thread_flag(TIF_IA32) ? IA32_PAGE_OFFSET : TASK_SIZE64)
++#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64)
++
++#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE/3)
++
++/*
++ * Size of io_bitmap.
++ */
++#define IO_BITMAP_BITS 65536
++#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
++#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
++#ifndef CONFIG_X86_NO_TSS
++#define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap)
++#endif
++#define INVALID_IO_BITMAP_OFFSET 0x8000
++
++struct i387_fxsave_struct {
++ u16 cwd;
++ u16 swd;
++ u16 twd;
++ u16 fop;
++ u64 rip;
++ u64 rdp;
++ u32 mxcsr;
++ u32 mxcsr_mask;
++ u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
++ u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 128 bytes */
++ u32 padding[24];
++} __attribute__ ((aligned (16)));
++
++union i387_union {
++ struct i387_fxsave_struct fxsave;
++};
++
++#ifndef CONFIG_X86_NO_TSS
++struct tss_struct {
++ u32 reserved1;
++ u64 rsp0;
++ u64 rsp1;
++ u64 rsp2;
++ u64 reserved2;
++ u64 ist[7];
++ u32 reserved3;
++ u32 reserved4;
++ u16 reserved5;
++ u16 io_bitmap_base;
++ /*
++ * The extra 1 is there because the CPU will access an
++ * additional byte beyond the end of the IO permission
++ * bitmap. The extra byte must be all 1 bits, and must
++ * be within the limit. Thus we have:
++ *
++ * 128 bytes, the bitmap itself, for ports 0..0x3ff
++ * 8 bytes, for an extra "long" of ~0UL
++ */
++ unsigned long io_bitmap[IO_BITMAP_LONGS + 1];
++} __attribute__((packed)) ____cacheline_aligned;
++
++DECLARE_PER_CPU(struct tss_struct,init_tss);
++#endif
++
++
++extern struct cpuinfo_x86 boot_cpu_data;
++#ifndef CONFIG_X86_NO_TSS
++/* Save the original ist values for checking stack pointers during debugging */
++struct orig_ist {
++ unsigned long ist[7];
++};
++DECLARE_PER_CPU(struct orig_ist, orig_ist);
++#endif
++
++#ifdef CONFIG_X86_VSMP
++#define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT)
++#define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT)
++#else
++#define ARCH_MIN_TASKALIGN 16
++#define ARCH_MIN_MMSTRUCT_ALIGN 0
++#endif
++
++struct thread_struct {
++ unsigned long rsp0;
++ unsigned long rsp;
++ unsigned long userrsp; /* Copy from PDA */
++ unsigned long fs;
++ unsigned long gs;
++ unsigned short es, ds, fsindex, gsindex;
++/* Hardware debugging registers */
++ unsigned long debugreg0;
++ unsigned long debugreg1;
++ unsigned long debugreg2;
++ unsigned long debugreg3;
++ unsigned long debugreg6;
++ unsigned long debugreg7;
++/* fault info */
++ unsigned long cr2, trap_no, error_code;
++/* floating point info */
++ union i387_union i387 __attribute__((aligned(16)));
++/* IO permissions. the bitmap could be moved into the GDT, that would make
++ switch faster for a limited number of ioperm using tasks. -AK */
++ int ioperm;
++ unsigned long *io_bitmap_ptr;
++ unsigned io_bitmap_max;
++/* cached TLS descriptors. */
++ u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
++ unsigned int iopl;
++} __attribute__((aligned(16)));
++
++#define INIT_THREAD { \
++ .rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
++}
++
++#ifndef CONFIG_X86_NO_TSS
++#define INIT_TSS { \
++ .rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
++}
++#endif
++
++#define INIT_MMAP \
++{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
++
++#define start_thread(regs,new_rip,new_rsp) do { \
++ asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \
++ load_gs_index(0); \
++ (regs)->rip = (new_rip); \
++ (regs)->rsp = (new_rsp); \
++ write_pda(oldrsp, (new_rsp)); \
++ (regs)->cs = __USER_CS; \
++ (regs)->ss = __USER_DS; \
++ (regs)->eflags = 0x200; \
++ set_fs(USER_DS); \
++} while(0)
++
++#define get_debugreg(var, register) \
++ var = HYPERVISOR_get_debugreg(register)
++#define set_debugreg(value, register) do { \
++ if (HYPERVISOR_set_debugreg(register, value)) \
++ BUG(); \
++} while (0)
++
++struct task_struct;
++struct mm_struct;
++
++/* Free all resources held by a thread. */
++extern void release_thread(struct task_struct *);
++
++/* Prepare to copy thread state - unlazy all lazy status */
++extern void prepare_to_copy(struct task_struct *tsk);
++
++/*
++ * create a kernel thread without removing it from tasklists
++ */
++extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
++
++/*
++ * Return saved PC of a blocked thread.
++ * What is this good for? it will be always the scheduler or ret_from_fork.
++ */
++#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.rsp - 8))
++
++extern unsigned long get_wchan(struct task_struct *p);
++#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.rsp0 - 1)
++#define KSTK_EIP(tsk) (task_pt_regs(tsk)->rip)
++#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
++
++
++struct microcode_header {
++ unsigned int hdrver;
++ unsigned int rev;
++ unsigned int date;
++ unsigned int sig;
++ unsigned int cksum;
++ unsigned int ldrver;
++ unsigned int pf;
++ unsigned int datasize;
++ unsigned int totalsize;
++ unsigned int reserved[3];
++};
++
++struct microcode {
++ struct microcode_header hdr;
++ unsigned int bits[0];
++};
++
++typedef struct microcode microcode_t;
++typedef struct microcode_header microcode_header_t;
++
++/* microcode format is extended from prescott processors */
++struct extended_signature {
++ unsigned int sig;
++ unsigned int pf;
++ unsigned int cksum;
++};
++
++struct extended_sigtable {
++ unsigned int count;
++ unsigned int cksum;
++ unsigned int reserved[3];
++ struct extended_signature sigs[0];
++};
++
++
++#define ASM_NOP1 K8_NOP1
++#define ASM_NOP2 K8_NOP2
++#define ASM_NOP3 K8_NOP3
++#define ASM_NOP4 K8_NOP4
++#define ASM_NOP5 K8_NOP5
++#define ASM_NOP6 K8_NOP6
++#define ASM_NOP7 K8_NOP7
++#define ASM_NOP8 K8_NOP8
++
++/* Opteron nops */
++#define K8_NOP1 ".byte 0x90\n"
++#define K8_NOP2 ".byte 0x66,0x90\n"
++#define K8_NOP3 ".byte 0x66,0x66,0x90\n"
++#define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n"
++#define K8_NOP5 K8_NOP3 K8_NOP2
++#define K8_NOP6 K8_NOP3 K8_NOP3
++#define K8_NOP7 K8_NOP4 K8_NOP3
++#define K8_NOP8 K8_NOP4 K8_NOP4
++
++#define ASM_NOP_MAX 8
++
++/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
++static inline void rep_nop(void)
++{
++ __asm__ __volatile__("rep;nop": : :"memory");
++}
++
++/* Stop speculative execution */
++static inline void sync_core(void)
++{
++ int tmp;
++ asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory");
++}
++
++#define cpu_has_fpu 1
++
++#define ARCH_HAS_PREFETCH
++static inline void prefetch(void *x)
++{
++ asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
++}
++
++#define ARCH_HAS_PREFETCHW 1
++static inline void prefetchw(void *x)
++{
++ alternative_input("prefetcht0 (%1)",
++ "prefetchw (%1)",
++ X86_FEATURE_3DNOW,
++ "r" (x));
++}
++
++#define ARCH_HAS_SPINLOCK_PREFETCH 1
++
++#define spin_lock_prefetch(x) prefetchw(x)
++
++#define cpu_relax() rep_nop()
++
++/*
++ * NSC/Cyrix CPU configuration register indexes
++ */
++#define CX86_CCR0 0xc0
++#define CX86_CCR1 0xc1
++#define CX86_CCR2 0xc2
++#define CX86_CCR3 0xc3
++#define CX86_CCR4 0xe8
++#define CX86_CCR5 0xe9
++#define CX86_CCR6 0xea
++#define CX86_CCR7 0xeb
++#define CX86_DIR0 0xfe
++#define CX86_DIR1 0xff
++#define CX86_ARR_BASE 0xc4
++#define CX86_RCR_BASE 0xdc
++
++/*
++ * NSC/Cyrix CPU indexed register access macros
++ */
++
++#define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); })
++
++#define setCx86(reg, data) do { \
++ outb((reg), 0x22); \
++ outb((data), 0x23); \
++} while (0)
++
++static inline void serialize_cpu(void)
++{
++ __asm__ __volatile__ ("cpuid" : : : "ax", "bx", "cx", "dx");
++}
++
++static inline void __monitor(const void *eax, unsigned long ecx,
++ unsigned long edx)
++{
++ /* "monitor %eax,%ecx,%edx;" */
++ asm volatile(
++ ".byte 0x0f,0x01,0xc8;"
++ : :"a" (eax), "c" (ecx), "d"(edx));
++}
++
++static inline void __mwait(unsigned long eax, unsigned long ecx)
++{
++ /* "mwait %eax,%ecx;" */
++ asm volatile(
++ ".byte 0x0f,0x01,0xc9;"
++ : :"a" (eax), "c" (ecx));
++}
++
++#define stack_current() \
++({ \
++ struct thread_info *ti; \
++ asm("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
++ ti->task; \
++})
++
++#define cache_line_size() (boot_cpu_data.x86_cache_alignment)
++
++extern unsigned long boot_option_idle_override;
++/* Boot loader type from the setup header */
++extern int bootloader_type;
++
++#define HAVE_ARCH_PICK_MMAP_LAYOUT 1
++
++#endif /* __ASM_X86_64_PROCESSOR_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/smp_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/smp_64.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,150 @@
++#ifndef __ASM_SMP_H
++#define __ASM_SMP_H
++
++/*
++ * We need the APIC definitions automatically as part of 'smp.h'
++ */
++#ifndef __ASSEMBLY__
++#include <linux/threads.h>
++#include <linux/cpumask.h>
++#include <linux/bitops.h>
++extern int disable_apic;
++#endif
++
++#ifdef CONFIG_X86_LOCAL_APIC
++#ifndef __ASSEMBLY__
++#include <asm/fixmap.h>
++#include <asm/mpspec.h>
++#ifdef CONFIG_X86_IO_APIC
++#include <asm/io_apic.h>
++#endif
++#include <asm/apic.h>
++#include <asm/thread_info.h>
++#endif
++#endif
++
++#ifdef CONFIG_SMP
++#ifndef ASSEMBLY
++
++#include <asm/pda.h>
++
++struct pt_regs;
++
++extern cpumask_t cpu_present_mask;
++extern cpumask_t cpu_possible_map;
++extern cpumask_t cpu_online_map;
++extern cpumask_t cpu_initialized;
++
++/*
++ * Private routines/data
++ */
++
++extern void smp_alloc_memory(void);
++extern volatile unsigned long smp_invalidate_needed;
++extern int pic_mode;
++extern void lock_ipi_call_lock(void);
++extern void unlock_ipi_call_lock(void);
++extern int smp_num_siblings;
++extern void smp_send_reschedule(int cpu);
++void smp_stop_cpu(void);
++extern int smp_call_function_single(int cpuid, void (*func) (void *info),
++ void *info, int retry, int wait);
++
++extern cpumask_t cpu_sibling_map[NR_CPUS];
++extern cpumask_t cpu_core_map[NR_CPUS];
++extern u8 cpu_llc_id[NR_CPUS];
++
++#define SMP_TRAMPOLINE_BASE 0x6000
++
++/*
++ * On x86 all CPUs are mapped 1:1 to the APIC space.
++ * This simplifies scheduling and IPI sending and
++ * compresses data structures.
++ */
++
++static inline int num_booting_cpus(void)
++{
++ return cpus_weight(cpu_possible_map);
++}
++
++#define raw_smp_processor_id() read_pda(cpunumber)
++
++#ifdef CONFIG_X86_LOCAL_APIC
++static inline int hard_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
++}
++#endif
++
++extern int safe_smp_processor_id(void);
++extern int __cpu_disable(void);
++extern void __cpu_die(unsigned int cpu);
++extern void prefill_possible_map(void);
++extern unsigned num_processors;
++extern unsigned disabled_cpus;
++
++#endif /* !ASSEMBLY */
++
++#define NO_PROC_ID 0xFF /* No processor magic marker */
++
++#endif
++
++#ifndef ASSEMBLY
++/*
++ * Some lowlevel functions might want to know about
++ * the real APIC ID <-> CPU # mapping.
++ */
++extern u8 x86_cpu_to_apicid[NR_CPUS]; /* physical ID */
++extern u8 x86_cpu_to_log_apicid[NR_CPUS];
++extern u8 bios_cpu_apicid[];
++
++#ifdef CONFIG_X86_LOCAL_APIC
++static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
++{
++ return cpus_addr(cpumask)[0];
++}
++
++static inline int cpu_present_to_apicid(int mps_cpu)
++{
++ if (mps_cpu < NR_CPUS)
++ return (int)bios_cpu_apicid[mps_cpu];
++ else
++ return BAD_APICID;
++}
++#endif
++
++#endif /* !ASSEMBLY */
++
++#ifndef CONFIG_SMP
++#define stack_smp_processor_id() 0
++#define safe_smp_processor_id() 0
++#define cpu_logical_map(x) (x)
++#else
++#include <asm/thread_info.h>
++#define stack_smp_processor_id() \
++({ \
++ struct thread_info *ti; \
++ __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
++ ti->cpu; \
++})
++#endif
++
++#ifndef __ASSEMBLY__
++#ifdef CONFIG_X86_LOCAL_APIC
++static __inline int logical_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
++}
++#endif
++#endif
++
++#ifdef CONFIG_SMP
++#define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
++#else
++#define cpu_physical_id(cpu) boot_cpu_id
++#endif
++
++#endif
++
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/system_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/system_64.h 2007-11-26 16:59:25.000000000 +0100
+@@ -0,0 +1,256 @@
++#ifndef __ASM_SYSTEM_H
++#define __ASM_SYSTEM_H
++
++#include <linux/kernel.h>
++#include <asm/segment.h>
++#include <asm/alternative.h>
++
++#include <asm/synch_bitops.h>
++#include <asm/hypervisor.h>
++#include <xen/interface/arch-x86_64.h>
++
++#ifdef __KERNEL__
++
++#define __STR(x) #x
++#define STR(x) __STR(x)
++
++#define __SAVE(reg,offset) "movq %%" #reg ",(14-" #offset ")*8(%%rsp)\n\t"
++#define __RESTORE(reg,offset) "movq (14-" #offset ")*8(%%rsp),%%" #reg "\n\t"
++
++/* frame pointer must be last for get_wchan */
++#define SAVE_CONTEXT "pushf ; pushq %%rbp ; movq %%rsi,%%rbp\n\t"
++#define RESTORE_CONTEXT "movq %%rbp,%%rsi ; popq %%rbp ; popf\n\t"
++
++#define __EXTRA_CLOBBER \
++ ,"rcx","rbx","rdx","r8","r9","r10","r11","r12","r13","r14","r15"
++
++#define switch_to(prev,next,last) \
++ asm volatile(SAVE_CONTEXT \
++ "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */ \
++ "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */ \
++ "call __switch_to\n\t" \
++ ".globl thread_return\n" \
++ "thread_return:\n\t" \
++ "movq %%gs:%P[pda_pcurrent],%%rsi\n\t" \
++ "movq %P[thread_info](%%rsi),%%r8\n\t" \
++ LOCK_PREFIX "btr %[tif_fork],%P[ti_flags](%%r8)\n\t" \
++ "movq %%rax,%%rdi\n\t" \
++ "jc ret_from_fork\n\t" \
++ RESTORE_CONTEXT \
++ : "=a" (last) \
++ : [next] "S" (next), [prev] "D" (prev), \
++ [threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \
++ [ti_flags] "i" (offsetof(struct thread_info, flags)),\
++ [tif_fork] "i" (TIF_FORK), \
++ [thread_info] "i" (offsetof(struct task_struct, thread_info)), \
++ [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \
++ : "memory", "cc" __EXTRA_CLOBBER)
++
++extern void load_gs_index(unsigned);
++
++/*
++ * Load a segment. Fall back on loading the zero
++ * segment if something goes wrong..
++ */
++#define loadsegment(seg,value) \
++ asm volatile("\n" \
++ "1:\t" \
++ "movl %k0,%%" #seg "\n" \
++ "2:\n" \
++ ".section .fixup,\"ax\"\n" \
++ "3:\t" \
++ "movl %1,%%" #seg "\n\t" \
++ "jmp 2b\n" \
++ ".previous\n" \
++ ".section __ex_table,\"a\"\n\t" \
++ ".align 8\n\t" \
++ ".quad 1b,3b\n" \
++ ".previous" \
++ : :"r" (value), "r" (0))
++
++/*
++ * Clear and set 'TS' bit respectively
++ */
++#define clts() (HYPERVISOR_fpu_taskswitch(0))
++
++static inline unsigned long read_cr0(void)
++{
++ unsigned long cr0;
++ asm volatile("movq %%cr0,%0" : "=r" (cr0));
++ return cr0;
++}
++
++static inline void write_cr0(unsigned long val)
++{
++ asm volatile("movq %0,%%cr0" :: "r" (val));
++}
++
++#define read_cr3() ({ \
++ unsigned long __dummy; \
++ asm("movq %%cr3,%0" : "=r" (__dummy)); \
++ machine_to_phys(__dummy); \
++})
++
++static inline unsigned long read_cr4(void)
++{
++ unsigned long cr4;
++ asm("movq %%cr4,%0" : "=r" (cr4));
++ return cr4;
++}
++
++static inline void write_cr4(unsigned long val)
++{
++ asm volatile("movq %0,%%cr4" :: "r" (val));
++}
++
++#define stts() (HYPERVISOR_fpu_taskswitch(1))
++
++#define wbinvd() \
++ __asm__ __volatile__ ("wbinvd": : :"memory");
++
++/*
++ * On SMP systems, when the scheduler does migration-cost autodetection,
++ * it needs a way to flush as much of the CPU's caches as possible.
++ */
++static inline void sched_cacheflush(void)
++{
++ wbinvd();
++}
++
++#endif /* __KERNEL__ */
++
++#define nop() __asm__ __volatile__ ("nop")
++
++#define xchg(ptr,v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr))))
++
++#define tas(ptr) (xchg((ptr),1))
++
++#define __xg(x) ((volatile long *)(x))
++
++static inline void set_64bit(volatile unsigned long *ptr, unsigned long val)
++{
++ *ptr = val;
++}
++
++#define _set_64bit set_64bit
++
++/*
++ * Note: no "lock" prefix even on SMP: xchg always implies lock anyway
++ * Note 2: xchg has side effect, so that attribute volatile is necessary,
++ * but generally the primitive is invalid, *ptr is output argument. --ANK
++ */
++static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
++{
++ switch (size) {
++ case 1:
++ __asm__ __volatile__("xchgb %b0,%1"
++ :"=q" (x)
++ :"m" (*__xg(ptr)), "0" (x)
++ :"memory");
++ break;
++ case 2:
++ __asm__ __volatile__("xchgw %w0,%1"
++ :"=r" (x)
++ :"m" (*__xg(ptr)), "0" (x)
++ :"memory");
++ break;
++ case 4:
++ __asm__ __volatile__("xchgl %k0,%1"
++ :"=r" (x)
++ :"m" (*__xg(ptr)), "0" (x)
++ :"memory");
++ break;
++ case 8:
++ __asm__ __volatile__("xchgq %0,%1"
++ :"=r" (x)
++ :"m" (*__xg(ptr)), "0" (x)
++ :"memory");
++ break;
++ }
++ return x;
++}
++
++/*
++ * Atomic compare and exchange. Compare OLD with MEM, if identical,
++ * store NEW in MEM. Return the initial value in MEM. Success is
++ * indicated by comparing RETURN with OLD.
++ */
++
++#define __HAVE_ARCH_CMPXCHG 1
++
++static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
++ unsigned long new, int size)
++{
++ unsigned long prev;
++ switch (size) {
++ case 1:
++ __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
++ : "=a"(prev)
++ : "q"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ case 2:
++ __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ case 4:
++ __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %k1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ case 8:
++ __asm__ __volatile__(LOCK_PREFIX "cmpxchgq %1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ }
++ return old;
++}
++
++#define cmpxchg(ptr,o,n)\
++ ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
++ (unsigned long)(n),sizeof(*(ptr))))
++
++#ifdef CONFIG_SMP
++#define smp_mb() mb()
++#define smp_rmb() rmb()
++#define smp_wmb() wmb()
++#define smp_read_barrier_depends() do {} while(0)
++#else
++#define smp_mb() barrier()
++#define smp_rmb() barrier()
++#define smp_wmb() barrier()
++#define smp_read_barrier_depends() do {} while(0)
++#endif
++
++
++/*
++ * Force strict CPU ordering.
++ * And yes, this is required on UP too when we're talking
++ * to devices.
++ */
++#define mb() asm volatile("mfence":::"memory")
++#define rmb() asm volatile("lfence":::"memory")
++
++#ifdef CONFIG_UNORDERED_IO
++#define wmb() asm volatile("sfence" ::: "memory")
++#else
++#define wmb() asm volatile("" ::: "memory")
++#endif
++#define read_barrier_depends() do {} while(0)
++#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
++
++#define warn_if_not_ulong(x) do { unsigned long foo; (void) (&(x) == &foo); } while (0)
++
++#include <linux/irqflags.h>
++
++void cpu_idle_wait(void);
++
++extern unsigned long arch_align_stack(unsigned long sp);
++extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
++
++#endif
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/tlbflush_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/tlbflush_64.h 2007-11-26 16:59:25.000000000 +0100
+@@ -0,0 +1,103 @@
++#ifndef _X8664_TLBFLUSH_H
++#define _X8664_TLBFLUSH_H
++
++#include <linux/mm.h>
++#include <asm/processor.h>
++
++#define __flush_tlb() xen_tlb_flush()
++
++/*
++ * Global pages have to be flushed a bit differently. Not a real
++ * performance problem because this does not happen often.
++ */
++#define __flush_tlb_global() xen_tlb_flush()
++
++
++extern unsigned long pgkern_mask;
++
++#define __flush_tlb_all() __flush_tlb_global()
++
++#define __flush_tlb_one(addr) xen_invlpg((unsigned long)addr)
++
++
++/*
++ * TLB flushing:
++ *
++ * - flush_tlb() flushes the current mm struct TLBs
++ * - flush_tlb_all() flushes all processes TLBs
++ * - flush_tlb_mm(mm) flushes the specified mm context TLB's
++ * - flush_tlb_page(vma, vmaddr) flushes one page
++ * - flush_tlb_range(vma, start, end) flushes a range of pages
++ * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
++ * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
++ *
++ * x86-64 can only flush individual pages or full VMs. For a range flush
++ * we always do the full VM. Might be worth trying if for a small
++ * range a few INVLPGs in a row are a win.
++ */
++
++#ifndef CONFIG_SMP
++
++#define flush_tlb() __flush_tlb()
++#define flush_tlb_all() __flush_tlb_all()
++#define local_flush_tlb() __flush_tlb()
++
++static inline void flush_tlb_mm(struct mm_struct *mm)
++{
++ if (mm == current->active_mm)
++ __flush_tlb();
++}
++
++static inline void flush_tlb_page(struct vm_area_struct *vma,
++ unsigned long addr)
++{
++ if (vma->vm_mm == current->active_mm)
++ __flush_tlb_one(addr);
++}
++
++static inline void flush_tlb_range(struct vm_area_struct *vma,
++ unsigned long start, unsigned long end)
++{
++ if (vma->vm_mm == current->active_mm)
++ __flush_tlb();
++}
++
++#else
++
++#include <asm/smp.h>
++
++#define local_flush_tlb() \
++ __flush_tlb()
++
++#define flush_tlb_all xen_tlb_flush_all
++#define flush_tlb_current_task() xen_tlb_flush_mask(¤t->mm->cpu_vm_mask)
++#define flush_tlb_mm(mm) xen_tlb_flush_mask(&(mm)->cpu_vm_mask)
++#define flush_tlb_page(vma, va) xen_invlpg_mask(&(vma)->vm_mm->cpu_vm_mask, va)
++
++#define flush_tlb() flush_tlb_current_task()
++
++static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
++{
++ flush_tlb_mm(vma->vm_mm);
++}
++
++#define TLBSTATE_OK 1
++#define TLBSTATE_LAZY 2
++
++/* Roughly an IPI every 20MB with 4k pages for freeing page table
++ ranges. Cost is about 42k of memory for each CPU. */
++#define ARCH_FREE_PTE_NR 5350
++
++#endif
++
++#define flush_tlb_kernel_range(start, end) flush_tlb_all()
++
++static inline void flush_tlb_pgtables(struct mm_struct *mm,
++ unsigned long start, unsigned long end)
++{
++ /* x86_64 does not keep any page table caches in a software TLB.
++ The CPUs do in their hardware TLBs, but they are handled
++ by the normal TLB flushing algorithms. */
++}
++
++#endif /* _X8664_TLBFLUSH_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/xor_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/xor_64.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,328 @@
++/*
++ * x86-64 changes / gcc fixes from Andi Kleen.
++ * Copyright 2002 Andi Kleen, SuSE Labs.
++ *
++ * This hasn't been optimized for the hammer yet, but there are likely
++ * no advantages to be gotten from x86-64 here anyways.
++ */
++
++typedef struct { unsigned long a,b; } __attribute__((aligned(16))) xmm_store_t;
++
++/* Doesn't use gcc to save the XMM registers, because there is no easy way to
++ tell it to do a clts before the register saving. */
++#define XMMS_SAVE do { \
++ preempt_disable(); \
++ if (!(current_thread_info()->status & TS_USEDFPU)) \
++ clts(); \
++ __asm__ __volatile__ ( \
++ "movups %%xmm0,(%1) ;\n\t" \
++ "movups %%xmm1,0x10(%1) ;\n\t" \
++ "movups %%xmm2,0x20(%1) ;\n\t" \
++ "movups %%xmm3,0x30(%1) ;\n\t" \
++ : "=&r" (cr0) \
++ : "r" (xmm_save) \
++ : "memory"); \
++} while(0)
++
++#define XMMS_RESTORE do { \
++ asm volatile ( \
++ "sfence ;\n\t" \
++ "movups (%1),%%xmm0 ;\n\t" \
++ "movups 0x10(%1),%%xmm1 ;\n\t" \
++ "movups 0x20(%1),%%xmm2 ;\n\t" \
++ "movups 0x30(%1),%%xmm3 ;\n\t" \
++ : \
++ : "r" (cr0), "r" (xmm_save) \
++ : "memory"); \
++ if (!(current_thread_info()->status & TS_USEDFPU)) \
++ stts(); \
++ preempt_enable(); \
++} while(0)
++
++#define OFFS(x) "16*("#x")"
++#define PF_OFFS(x) "256+16*("#x")"
++#define PF0(x) " prefetchnta "PF_OFFS(x)"(%[p1]) ;\n"
++#define LD(x,y) " movaps "OFFS(x)"(%[p1]), %%xmm"#y" ;\n"
++#define ST(x,y) " movaps %%xmm"#y", "OFFS(x)"(%[p1]) ;\n"
++#define PF1(x) " prefetchnta "PF_OFFS(x)"(%[p2]) ;\n"
++#define PF2(x) " prefetchnta "PF_OFFS(x)"(%[p3]) ;\n"
++#define PF3(x) " prefetchnta "PF_OFFS(x)"(%[p4]) ;\n"
++#define PF4(x) " prefetchnta "PF_OFFS(x)"(%[p5]) ;\n"
++#define PF5(x) " prefetchnta "PF_OFFS(x)"(%[p6]) ;\n"
++#define XO1(x,y) " xorps "OFFS(x)"(%[p2]), %%xmm"#y" ;\n"
++#define XO2(x,y) " xorps "OFFS(x)"(%[p3]), %%xmm"#y" ;\n"
++#define XO3(x,y) " xorps "OFFS(x)"(%[p4]), %%xmm"#y" ;\n"
++#define XO4(x,y) " xorps "OFFS(x)"(%[p5]), %%xmm"#y" ;\n"
++#define XO5(x,y) " xorps "OFFS(x)"(%[p6]), %%xmm"#y" ;\n"
++
++
++static void
++xor_sse_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
++{
++ unsigned int lines = bytes >> 8;
++ unsigned long cr0;
++ xmm_store_t xmm_save[4];
++
++ XMMS_SAVE;
++
++ asm volatile (
++#undef BLOCK
++#define BLOCK(i) \
++ LD(i,0) \
++ LD(i+1,1) \
++ PF1(i) \
++ PF1(i+2) \
++ LD(i+2,2) \
++ LD(i+3,3) \
++ PF0(i+4) \
++ PF0(i+6) \
++ XO1(i,0) \
++ XO1(i+1,1) \
++ XO1(i+2,2) \
++ XO1(i+3,3) \
++ ST(i,0) \
++ ST(i+1,1) \
++ ST(i+2,2) \
++ ST(i+3,3) \
++
++
++ PF0(0)
++ PF0(2)
++
++ " .align 32 ;\n"
++ " 1: ;\n"
++
++ BLOCK(0)
++ BLOCK(4)
++ BLOCK(8)
++ BLOCK(12)
++
++ " addq %[inc], %[p1] ;\n"
++ " addq %[inc], %[p2] ;\n"
++ " decl %[cnt] ; jnz 1b"
++ : [p1] "+r" (p1), [p2] "+r" (p2), [cnt] "+r" (lines)
++ : [inc] "r" (256UL)
++ : "memory");
++
++ XMMS_RESTORE;
++}
++
++static void
++xor_sse_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
++ unsigned long *p3)
++{
++ unsigned int lines = bytes >> 8;
++ xmm_store_t xmm_save[4];
++ unsigned long cr0;
++
++ XMMS_SAVE;
++
++ __asm__ __volatile__ (
++#undef BLOCK
++#define BLOCK(i) \
++ PF1(i) \
++ PF1(i+2) \
++ LD(i,0) \
++ LD(i+1,1) \
++ LD(i+2,2) \
++ LD(i+3,3) \
++ PF2(i) \
++ PF2(i+2) \
++ PF0(i+4) \
++ PF0(i+6) \
++ XO1(i,0) \
++ XO1(i+1,1) \
++ XO1(i+2,2) \
++ XO1(i+3,3) \
++ XO2(i,0) \
++ XO2(i+1,1) \
++ XO2(i+2,2) \
++ XO2(i+3,3) \
++ ST(i,0) \
++ ST(i+1,1) \
++ ST(i+2,2) \
++ ST(i+3,3) \
++
++
++ PF0(0)
++ PF0(2)
++
++ " .align 32 ;\n"
++ " 1: ;\n"
++
++ BLOCK(0)
++ BLOCK(4)
++ BLOCK(8)
++ BLOCK(12)
++
++ " addq %[inc], %[p1] ;\n"
++ " addq %[inc], %[p2] ;\n"
++ " addq %[inc], %[p3] ;\n"
++ " decl %[cnt] ; jnz 1b"
++ : [cnt] "+r" (lines),
++ [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3)
++ : [inc] "r" (256UL)
++ : "memory");
++ XMMS_RESTORE;
++}
++
++static void
++xor_sse_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
++ unsigned long *p3, unsigned long *p4)
++{
++ unsigned int lines = bytes >> 8;
++ xmm_store_t xmm_save[4];
++ unsigned long cr0;
++
++ XMMS_SAVE;
++
++ __asm__ __volatile__ (
++#undef BLOCK
++#define BLOCK(i) \
++ PF1(i) \
++ PF1(i+2) \
++ LD(i,0) \
++ LD(i+1,1) \
++ LD(i+2,2) \
++ LD(i+3,3) \
++ PF2(i) \
++ PF2(i+2) \
++ XO1(i,0) \
++ XO1(i+1,1) \
++ XO1(i+2,2) \
++ XO1(i+3,3) \
++ PF3(i) \
++ PF3(i+2) \
++ PF0(i+4) \
++ PF0(i+6) \
++ XO2(i,0) \
++ XO2(i+1,1) \
++ XO2(i+2,2) \
++ XO2(i+3,3) \
++ XO3(i,0) \
++ XO3(i+1,1) \
++ XO3(i+2,2) \
++ XO3(i+3,3) \
++ ST(i,0) \
++ ST(i+1,1) \
++ ST(i+2,2) \
++ ST(i+3,3) \
++
++
++ PF0(0)
++ PF0(2)
++
++ " .align 32 ;\n"
++ " 1: ;\n"
++
++ BLOCK(0)
++ BLOCK(4)
++ BLOCK(8)
++ BLOCK(12)
++
++ " addq %[inc], %[p1] ;\n"
++ " addq %[inc], %[p2] ;\n"
++ " addq %[inc], %[p3] ;\n"
++ " addq %[inc], %[p4] ;\n"
++ " decl %[cnt] ; jnz 1b"
++ : [cnt] "+c" (lines),
++ [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3), [p4] "+r" (p4)
++ : [inc] "r" (256UL)
++ : "memory" );
++
++ XMMS_RESTORE;
++}
++
++static void
++xor_sse_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
++ unsigned long *p3, unsigned long *p4, unsigned long *p5)
++{
++ unsigned int lines = bytes >> 8;
++ xmm_store_t xmm_save[4];
++ unsigned long cr0;
++
++ XMMS_SAVE;
++
++ __asm__ __volatile__ (
++#undef BLOCK
++#define BLOCK(i) \
++ PF1(i) \
++ PF1(i+2) \
++ LD(i,0) \
++ LD(i+1,1) \
++ LD(i+2,2) \
++ LD(i+3,3) \
++ PF2(i) \
++ PF2(i+2) \
++ XO1(i,0) \
++ XO1(i+1,1) \
++ XO1(i+2,2) \
++ XO1(i+3,3) \
++ PF3(i) \
++ PF3(i+2) \
++ XO2(i,0) \
++ XO2(i+1,1) \
++ XO2(i+2,2) \
++ XO2(i+3,3) \
++ PF4(i) \
++ PF4(i+2) \
++ PF0(i+4) \
++ PF0(i+6) \
++ XO3(i,0) \
++ XO3(i+1,1) \
++ XO3(i+2,2) \
++ XO3(i+3,3) \
++ XO4(i,0) \
++ XO4(i+1,1) \
++ XO4(i+2,2) \
++ XO4(i+3,3) \
++ ST(i,0) \
++ ST(i+1,1) \
++ ST(i+2,2) \
++ ST(i+3,3) \
++
++
++ PF0(0)
++ PF0(2)
++
++ " .align 32 ;\n"
++ " 1: ;\n"
++
++ BLOCK(0)
++ BLOCK(4)
++ BLOCK(8)
++ BLOCK(12)
++
++ " addq %[inc], %[p1] ;\n"
++ " addq %[inc], %[p2] ;\n"
++ " addq %[inc], %[p3] ;\n"
++ " addq %[inc], %[p4] ;\n"
++ " addq %[inc], %[p5] ;\n"
++ " decl %[cnt] ; jnz 1b"
++ : [cnt] "+c" (lines),
++ [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3), [p4] "+r" (p4),
++ [p5] "+r" (p5)
++ : [inc] "r" (256UL)
++ : "memory");
++
++ XMMS_RESTORE;
++}
++
++static struct xor_block_template xor_block_sse = {
++ .name = "generic_sse",
++ .do_2 = xor_sse_2,
++ .do_3 = xor_sse_3,
++ .do_4 = xor_sse_4,
++ .do_5 = xor_sse_5,
++};
++
++#undef XOR_TRY_TEMPLATES
++#define XOR_TRY_TEMPLATES \
++ do { \
++ xor_speed(&xor_block_sse); \
++ } while (0)
++
++/* We force the use of the SSE xor block because it can write around L2.
++ We may also be able to load into the L1 only depending on how the cpu
++ deals with a load to a line that is being prefetched. */
++#define XOR_SELECT_TEMPLATE(FASTEST) (&xor_block_sse)
+Index: head-2008-11-25/include/asm-x86/mach-xen/mach_time.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/mach_time.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,111 @@
++/*
++ * include/asm-i386/mach-default/mach_time.h
++ *
++ * Machine specific set RTC function for generic.
++ * Split out from time.c by Osamu Tomita <tomita@cinet.co.jp>
++ */
++#ifndef _MACH_TIME_H
++#define _MACH_TIME_H
++
++#include <asm-i386/mc146818rtc.h>
++
++/* for check timing call set_rtc_mmss() 500ms */
++/* used in arch/i386/time.c::do_timer_interrupt() */
++#define USEC_AFTER 500000
++#define USEC_BEFORE 500000
++
++/*
++ * In order to set the CMOS clock precisely, set_rtc_mmss has to be
++ * called 500 ms after the second nowtime has started, because when
++ * nowtime is written into the registers of the CMOS clock, it will
++ * jump to the next second precisely 500 ms later. Check the Motorola
++ * MC146818A or Dallas DS12887 data sheet for details.
++ *
++ * BUG: This routine does not handle hour overflow properly; it just
++ * sets the minutes. Usually you'll only notice that after reboot!
++ */
++static inline int mach_set_rtc_mmss(unsigned long nowtime)
++{
++ int retval = 0;
++ int real_seconds, real_minutes, cmos_minutes;
++ unsigned char save_control, save_freq_select;
++
++ save_control = CMOS_READ(RTC_CONTROL); /* tell the clock it's being set */
++ CMOS_WRITE((save_control|RTC_SET), RTC_CONTROL);
++
++ save_freq_select = CMOS_READ(RTC_FREQ_SELECT); /* stop and reset prescaler */
++ CMOS_WRITE((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
++
++ cmos_minutes = CMOS_READ(RTC_MINUTES);
++ if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
++ BCD_TO_BIN(cmos_minutes);
++
++ /*
++ * since we're only adjusting minutes and seconds,
++ * don't interfere with hour overflow. This avoids
++ * messing with unknown time zones but requires your
++ * RTC not to be off by more than 15 minutes
++ */
++ real_seconds = nowtime % 60;
++ real_minutes = nowtime / 60;
++ if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
++ real_minutes += 30; /* correct for half hour time zone */
++ real_minutes %= 60;
++
++ if (abs(real_minutes - cmos_minutes) < 30) {
++ if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
++ BIN_TO_BCD(real_seconds);
++ BIN_TO_BCD(real_minutes);
++ }
++ CMOS_WRITE(real_seconds,RTC_SECONDS);
++ CMOS_WRITE(real_minutes,RTC_MINUTES);
++ } else {
++ printk(KERN_WARNING
++ "set_rtc_mmss: can't update from %d to %d\n",
++ cmos_minutes, real_minutes);
++ retval = -1;
++ }
++
++ /* The following flags have to be released exactly in this order,
++ * otherwise the DS12887 (popular MC146818A clone with integrated
++ * battery and quartz) will not reset the oscillator and will not
++ * update precisely 500 ms later. You won't find this mentioned in
++ * the Dallas Semiconductor data sheets, but who believes data
++ * sheets anyway ... -- Markus Kuhn
++ */
++ CMOS_WRITE(save_control, RTC_CONTROL);
++ CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
++
++ return retval;
++}
++
++static inline unsigned long mach_get_cmos_time(void)
++{
++ unsigned int year, mon, day, hour, min, sec;
++
++ do {
++ sec = CMOS_READ(RTC_SECONDS);
++ min = CMOS_READ(RTC_MINUTES);
++ hour = CMOS_READ(RTC_HOURS);
++ day = CMOS_READ(RTC_DAY_OF_MONTH);
++ mon = CMOS_READ(RTC_MONTH);
++ year = CMOS_READ(RTC_YEAR);
++ } while (sec != CMOS_READ(RTC_SECONDS));
++
++ if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
++ BCD_TO_BIN(sec);
++ BCD_TO_BIN(min);
++ BCD_TO_BIN(hour);
++ BCD_TO_BIN(day);
++ BCD_TO_BIN(mon);
++ BCD_TO_BIN(year);
++ }
++
++ year += 1900;
++ if (year < 1970)
++ year += 100;
++
++ return mktime(year, mon, day, hour, min, sec);
++}
++
++#endif /* !_MACH_TIME_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/mach_timer.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/mach_timer.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,50 @@
++/*
++ * include/asm-i386/mach-default/mach_timer.h
++ *
++ * Machine specific calibrate_tsc() for generic.
++ * Split out from timer_tsc.c by Osamu Tomita <tomita@cinet.co.jp>
++ */
++/* ------ Calibrate the TSC -------
++ * Return 2^32 * (1 / (TSC clocks per usec)) for do_fast_gettimeoffset().
++ * Too much 64-bit arithmetic here to do this cleanly in C, and for
++ * accuracy's sake we want to keep the overhead on the CTC speaker (channel 2)
++ * output busy loop as low as possible. We avoid reading the CTC registers
++ * directly because of the awkward 8-bit access mechanism of the 82C54
++ * device.
++ */
++#ifndef _MACH_TIMER_H
++#define _MACH_TIMER_H
++
++#define CALIBRATE_TIME_MSEC 30 /* 30 msecs */
++#define CALIBRATE_LATCH \
++ ((CLOCK_TICK_RATE * CALIBRATE_TIME_MSEC + 1000/2)/1000)
++
++static inline void mach_prepare_counter(void)
++{
++ /* Set the Gate high, disable speaker */
++ outb((inb(0x61) & ~0x02) | 0x01, 0x61);
++
++ /*
++ * Now let's take care of CTC channel 2
++ *
++ * Set the Gate high, program CTC channel 2 for mode 0,
++ * (interrupt on terminal count mode), binary count,
++ * load 5 * LATCH count, (LSB and MSB) to begin countdown.
++ *
++ * Some devices need a delay here.
++ */
++ outb(0xb0, 0x43); /* binary, mode 0, LSB/MSB, Ch 2 */
++ outb_p(CALIBRATE_LATCH & 0xff, 0x42); /* LSB of count */
++ outb_p(CALIBRATE_LATCH >> 8, 0x42); /* MSB of count */
++}
++
++static inline void mach_countup(unsigned long *count_p)
++{
++ unsigned long count = 0;
++ do {
++ count++;
++ } while ((inb_p(0x61) & 0x20) == 0);
++ *count_p = count;
++}
++
++#endif /* !_MACH_TIMER_H */
+Index: head-2008-11-25/include/asm-x86/mach-xen/setup_arch_post.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/setup_arch_post.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,63 @@
++/**
++ * machine_specific_* - Hooks for machine specific setup.
++ *
++ * Description:
++ * This is included late in kernel/setup.c so that it can make
++ * use of all of the static functions.
++ **/
++
++#include <xen/interface/callback.h>
++
++extern void hypervisor_callback(void);
++extern void failsafe_callback(void);
++extern void nmi(void);
++
++static void __init machine_specific_arch_setup(void)
++{
++ int ret;
++ static struct callback_register __initdata event = {
++ .type = CALLBACKTYPE_event,
++ .address = (unsigned long) hypervisor_callback,
++ };
++ static struct callback_register __initdata failsafe = {
++ .type = CALLBACKTYPE_failsafe,
++ .address = (unsigned long)failsafe_callback,
++ };
++ static struct callback_register __initdata syscall = {
++ .type = CALLBACKTYPE_syscall,
++ .address = (unsigned long)system_call,
++ };
++#ifdef CONFIG_X86_LOCAL_APIC
++ static struct callback_register __initdata nmi_cb = {
++ .type = CALLBACKTYPE_nmi,
++ .address = (unsigned long)nmi,
++ };
++#endif
++
++ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &event);
++ if (ret == 0)
++ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &failsafe);
++ if (ret == 0)
++ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &syscall);
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (ret == -ENOSYS)
++ ret = HYPERVISOR_set_callbacks(
++ event.address,
++ failsafe.address,
++ syscall.address);
++#endif
++ BUG_ON(ret);
++
++#ifdef CONFIG_X86_LOCAL_APIC
++ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &nmi_cb);
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (ret == -ENOSYS) {
++ static struct xennmi_callback __initdata cb = {
++ .handler_address = (unsigned long)nmi
++ };
++
++ HYPERVISOR_nmi_op(XENNMI_register_callback, &cb);
++ }
++#endif
++#endif
++}
+Index: head-2008-11-25/include/asm-x86/mach-xen/setup_arch_pre.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/asm-x86/mach-xen/setup_arch_pre.h 2007-06-12 13:14:13.000000000 +0200
+@@ -0,0 +1,5 @@
++/* Hook to call BIOS initialisation function */
++
++#define ARCH_SETUP machine_specific_arch_setup();
++
++static void __init machine_specific_arch_setup(void);
+Index: head-2008-11-25/include/xen/blkif.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/blkif.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,123 @@
++/*
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_BLKIF_H__
++#define __XEN_BLKIF_H__
++
++#include <xen/interface/io/ring.h>
++#include <xen/interface/io/blkif.h>
++#include <xen/interface/io/protocols.h>
++
++/* Not a real protocol. Used to generate ring structs which contain
++ * the elements common to all protocols only. This way we get a
++ * compiler-checkable way to use common struct elements, so we can
++ * avoid using switch(protocol) in a number of places. */
++struct blkif_common_request {
++ char dummy;
++};
++struct blkif_common_response {
++ char dummy;
++};
++
++/* i386 protocol version */
++#pragma pack(push, 4)
++struct blkif_x86_32_request {
++ uint8_t operation; /* BLKIF_OP_??? */
++ uint8_t nr_segments; /* number of segments */
++ blkif_vdev_t handle; /* only for read/write requests */
++ uint64_t id; /* private guest value, echoed in resp */
++ blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */
++ struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
++};
++struct blkif_x86_32_response {
++ uint64_t id; /* copied from request */
++ uint8_t operation; /* copied from request */
++ int16_t status; /* BLKIF_RSP_??? */
++};
++typedef struct blkif_x86_32_request blkif_x86_32_request_t;
++typedef struct blkif_x86_32_response blkif_x86_32_response_t;
++#pragma pack(pop)
++
++/* x86_64 protocol version */
++struct blkif_x86_64_request {
++ uint8_t operation; /* BLKIF_OP_??? */
++ uint8_t nr_segments; /* number of segments */
++ blkif_vdev_t handle; /* only for read/write requests */
++ uint64_t __attribute__((__aligned__(8))) id;
++ blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */
++ struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
++};
++struct blkif_x86_64_response {
++ uint64_t __attribute__((__aligned__(8))) id;
++ uint8_t operation; /* copied from request */
++ int16_t status; /* BLKIF_RSP_??? */
++};
++typedef struct blkif_x86_64_request blkif_x86_64_request_t;
++typedef struct blkif_x86_64_response blkif_x86_64_response_t;
++
++DEFINE_RING_TYPES(blkif_common, struct blkif_common_request, struct blkif_common_response);
++DEFINE_RING_TYPES(blkif_x86_32, struct blkif_x86_32_request, struct blkif_x86_32_response);
++DEFINE_RING_TYPES(blkif_x86_64, struct blkif_x86_64_request, struct blkif_x86_64_response);
++
++union blkif_back_rings {
++ blkif_back_ring_t native;
++ blkif_common_back_ring_t common;
++ blkif_x86_32_back_ring_t x86_32;
++ blkif_x86_64_back_ring_t x86_64;
++};
++typedef union blkif_back_rings blkif_back_rings_t;
++
++enum blkif_protocol {
++ BLKIF_PROTOCOL_NATIVE = 1,
++ BLKIF_PROTOCOL_X86_32 = 2,
++ BLKIF_PROTOCOL_X86_64 = 3,
++};
++
++static void inline blkif_get_x86_32_req(blkif_request_t *dst, blkif_x86_32_request_t *src)
++{
++ int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST;
++ dst->operation = src->operation;
++ dst->nr_segments = src->nr_segments;
++ dst->handle = src->handle;
++ dst->id = src->id;
++ dst->sector_number = src->sector_number;
++ barrier();
++ if (n > dst->nr_segments)
++ n = dst->nr_segments;
++ for (i = 0; i < n; i++)
++ dst->seg[i] = src->seg[i];
++}
++
++static void inline blkif_get_x86_64_req(blkif_request_t *dst, blkif_x86_64_request_t *src)
++{
++ int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST;
++ dst->operation = src->operation;
++ dst->nr_segments = src->nr_segments;
++ dst->handle = src->handle;
++ dst->id = src->id;
++ dst->sector_number = src->sector_number;
++ barrier();
++ if (n > dst->nr_segments)
++ n = dst->nr_segments;
++ for (i = 0; i < n; i++)
++ dst->seg[i] = src->seg[i];
++}
++
++#endif /* __XEN_BLKIF_H__ */
+Index: head-2008-11-25/include/xen/compat_ioctl.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/compat_ioctl.h 2007-07-10 09:42:30.000000000 +0200
+@@ -0,0 +1,45 @@
++/*
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License as
++ * published by the Free Software Foundation; either version 2 of the
++ * License, or (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
++ *
++ * Copyright IBM Corp. 2007
++ *
++ * Authors: Jimi Xenidis <jimix@watson.ibm.com>
++ * Hollis Blanchard <hollisb@us.ibm.com>
++ */
++
++#ifndef __LINUX_XEN_COMPAT_H__
++#define __LINUX_XEN_COMPAT_H__
++
++#include <linux/compat.h>
++
++extern int privcmd_ioctl_32(int fd, unsigned int cmd, unsigned long arg);
++struct privcmd_mmap_32 {
++ int num;
++ domid_t dom;
++ compat_uptr_t entry;
++};
++
++struct privcmd_mmapbatch_32 {
++ int num; /* number of pages to populate */
++ domid_t dom; /* target domain */
++ __u64 addr; /* virtual address */
++ compat_uptr_t arr; /* array of mfns - top nibble set on err */
++};
++#define IOCTL_PRIVCMD_MMAP_32 \
++ _IOC(_IOC_NONE, 'P', 2, sizeof(struct privcmd_mmap_32))
++#define IOCTL_PRIVCMD_MMAPBATCH_32 \
++ _IOC(_IOC_NONE, 'P', 3, sizeof(struct privcmd_mmapbatch_32))
++
++#endif /* __LINUX_XEN_COMPAT_H__ */
+Index: head-2008-11-25/include/xen/cpu_hotplug.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/cpu_hotplug.h 2007-08-16 18:07:01.000000000 +0200
+@@ -0,0 +1,41 @@
++#ifndef __XEN_CPU_HOTPLUG_H__
++#define __XEN_CPU_HOTPLUG_H__
++
++#include <linux/kernel.h>
++#include <linux/cpumask.h>
++
++#if defined(CONFIG_X86) && defined(CONFIG_SMP)
++extern cpumask_t cpu_initialized_map;
++#endif
++
++#if defined(CONFIG_HOTPLUG_CPU)
++
++int cpu_up_check(unsigned int cpu);
++void init_xenbus_allowed_cpumask(void);
++int smp_suspend(void);
++void smp_resume(void);
++
++void cpu_bringup(void);
++
++#else /* !defined(CONFIG_HOTPLUG_CPU) */
++
++#define cpu_up_check(cpu) (0)
++#define init_xenbus_allowed_cpumask() ((void)0)
++
++static inline int smp_suspend(void)
++{
++ if (num_online_cpus() > 1) {
++ printk(KERN_WARNING "Can't suspend SMP guests "
++ "without CONFIG_HOTPLUG_CPU\n");
++ return -EOPNOTSUPP;
++ }
++ return 0;
++}
++
++static inline void smp_resume(void)
++{
++}
++
++#endif /* !defined(CONFIG_HOTPLUG_CPU) */
++
++#endif /* __XEN_CPU_HOTPLUG_H__ */
+Index: head-2008-11-25/include/xen/driver_util.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/driver_util.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,14 @@
++
++#ifndef __ASM_XEN_DRIVER_UTIL_H__
++#define __ASM_XEN_DRIVER_UTIL_H__
++
++#include <linux/vmalloc.h>
++#include <linux/device.h>
++
++/* Allocate/destroy a 'vmalloc' VM area. */
++extern struct vm_struct *alloc_vm_area(unsigned long size);
++extern void free_vm_area(struct vm_struct *area);
++
++extern struct class *get_xen_class(void);
++
++#endif /* __ASM_XEN_DRIVER_UTIL_H__ */
+Index: head-2008-11-25/include/xen/evtchn.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/evtchn.h 2008-09-15 13:40:15.000000000 +0200
+@@ -0,0 +1,160 @@
++/******************************************************************************
++ * evtchn.h
++ *
++ * Communication via Xen event channels.
++ * Also definitions for the device that demuxes notifications to userspace.
++ *
++ * Copyright (c) 2004-2005, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __ASM_EVTCHN_H__
++#define __ASM_EVTCHN_H__
++
++#include <linux/interrupt.h>
++#include <asm/hypervisor.h>
++#include <asm/ptrace.h>
++#include <asm/synch_bitops.h>
++#include <xen/interface/event_channel.h>
++#include <linux/smp.h>
++
++/*
++ * LOW-LEVEL DEFINITIONS
++ */
++
++/*
++ * Dynamically bind an event source to an IRQ-like callback handler.
++ * On some platforms this may not be implemented via the Linux IRQ subsystem.
++ * The IRQ argument passed to the callback handler is the same as returned
++ * from the bind call. It may not correspond to a Linux IRQ number.
++ * Returns IRQ or negative errno.
++ */
++int bind_caller_port_to_irqhandler(
++ unsigned int caller_port,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id);
++int bind_listening_port_to_irqhandler(
++ unsigned int remote_domain,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id);
++int bind_interdomain_evtchn_to_irqhandler(
++ unsigned int remote_domain,
++ unsigned int remote_port,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id);
++int bind_virq_to_irqhandler(
++ unsigned int virq,
++ unsigned int cpu,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id);
++int bind_ipi_to_irqhandler(
++ unsigned int ipi,
++ unsigned int cpu,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id);
++
++/*
++ * Common unbind function for all event sources. Takes IRQ to unbind from.
++ * Automatically closes the underlying event channel (except for bindings
++ * made with bind_caller_port_to_irqhandler()).
++ */
++void unbind_from_irqhandler(unsigned int irq, void *dev_id);
++
++void irq_resume(void);
++
++/* Entry point for notifications into Linux subsystems. */
++asmlinkage void evtchn_do_upcall(struct pt_regs *regs);
++
++/* Entry point for notifications into the userland character device. */
++void evtchn_device_upcall(int port);
++
++/* Mark a PIRQ as unavailable for dynamic allocation. */
++void evtchn_register_pirq(int irq);
++/* Map a Xen-supplied PIRQ to a dynamically allocated one. */
++int evtchn_map_pirq(int irq, int xen_pirq);
++/* Look up a Xen-supplied PIRQ for a dynamically allocated one. */
++int evtchn_get_xen_pirq(int irq);
++
++void mask_evtchn(int port);
++void disable_all_local_evtchn(void);
++void unmask_evtchn(int port);
++
++#ifdef CONFIG_SMP
++void rebind_evtchn_to_cpu(int port, unsigned int cpu);
++#else
++#define rebind_evtchn_to_cpu(port, cpu) ((void)0)
++#endif
++
++static inline int test_and_set_evtchn_mask(int port)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++ return synch_test_and_set_bit(port, s->evtchn_mask);
++}
++
++static inline void clear_evtchn(int port)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++ synch_clear_bit(port, s->evtchn_pending);
++}
++
++static inline void notify_remote_via_evtchn(int port)
++{
++ struct evtchn_send send = { .port = port };
++ VOID(HYPERVISOR_event_channel_op(EVTCHNOP_send, &send));
++}
++
++/*
++ * Use these to access the event channel underlying the IRQ handle returned
++ * by bind_*_to_irqhandler().
++ */
++void notify_remote_via_irq(int irq);
++int irq_to_evtchn_port(int irq);
++
++#define PIRQ_SET_MAPPING 0x0
++#define PIRQ_CLEAR_MAPPING 0x1
++#define PIRQ_GET_MAPPING 0x3
++int pirq_mapstatus(int pirq, int action);
++int set_pirq_hw_action(int pirq, int (*action)(int pirq, int action));
++int clear_pirq_hw_action(int pirq);
++
++#define PIRQ_STARTUP 1
++#define PIRQ_SHUTDOWN 2
++#define PIRQ_ENABLE 3
++#define PIRQ_DISABLE 4
++#define PIRQ_END 5
++#define PIRQ_ACK 6
++
++#endif /* __ASM_EVTCHN_H__ */
+Index: head-2008-11-25/include/xen/firmware.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/firmware.h 2007-07-02 08:16:19.000000000 +0200
+@@ -0,0 +1,10 @@
++#ifndef __XEN_FIRMWARE_H__
++#define __XEN_FIRMWARE_H__
++
++#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
++void copy_edd(void);
++#endif
++
++void copy_edid(void);
++
++#endif /* __XEN_FIRMWARE_H__ */
+Index: head-2008-11-25/include/xen/gnttab.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/gnttab.h 2008-11-04 11:13:10.000000000 +0100
+@@ -0,0 +1,164 @@
++/******************************************************************************
++ * gnttab.h
++ *
++ * Two sets of functionality:
++ * 1. Granting foreign access to our memory reservation.
++ * 2. Accessing others' memory reservations via grant references.
++ * (i.e., mechanisms for both sender and recipient of grant references)
++ *
++ * Copyright (c) 2004-2005, K A Fraser
++ * Copyright (c) 2005, Christopher Clark
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __ASM_GNTTAB_H__
++#define __ASM_GNTTAB_H__
++
++#include <asm/hypervisor.h>
++#include <asm/maddr.h> /* maddr_t */
++#include <linux/mm.h>
++#include <xen/interface/grant_table.h>
++#include <xen/features.h>
++
++struct gnttab_free_callback {
++ struct gnttab_free_callback *next;
++ void (*fn)(void *);
++ void *arg;
++ u16 count;
++ u8 queued;
++};
++
++int gnttab_grant_foreign_access(domid_t domid, unsigned long frame,
++ int flags);
++
++/*
++ * End access through the given grant reference, iff the grant entry is no
++ * longer in use. Return 1 if the grant entry was freed, 0 if it is still in
++ * use.
++ */
++int gnttab_end_foreign_access_ref(grant_ref_t ref);
++
++/*
++ * Eventually end access through the given grant reference, and once that
++ * access has been ended, free the given page too. Access will be ended
++ * immediately iff the grant entry is not in use, otherwise it will happen
++ * some time later. page may be 0, in which case no freeing will occur.
++ */
++void gnttab_end_foreign_access(grant_ref_t ref, unsigned long page);
++
++int gnttab_grant_foreign_transfer(domid_t domid, unsigned long pfn);
++
++unsigned long gnttab_end_foreign_transfer_ref(grant_ref_t ref);
++unsigned long gnttab_end_foreign_transfer(grant_ref_t ref);
++
++int gnttab_query_foreign_access(grant_ref_t ref);
++
++/*
++ * operations on reserved batches of grant references
++ */
++int gnttab_alloc_grant_references(u16 count, grant_ref_t *pprivate_head);
++
++void gnttab_free_grant_reference(grant_ref_t ref);
++
++void gnttab_free_grant_references(grant_ref_t head);
++
++int gnttab_empty_grant_references(const grant_ref_t *pprivate_head);
++
++int gnttab_claim_grant_reference(grant_ref_t *pprivate_head);
++
++void gnttab_release_grant_reference(grant_ref_t *private_head,
++ grant_ref_t release);
++
++void gnttab_request_free_callback(struct gnttab_free_callback *callback,
++ void (*fn)(void *), void *arg, u16 count);
++void gnttab_cancel_free_callback(struct gnttab_free_callback *callback);
++
++void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid,
++ unsigned long frame, int flags);
++
++void gnttab_grant_foreign_transfer_ref(grant_ref_t, domid_t domid,
++ unsigned long pfn);
++
++int gnttab_copy_grant_page(grant_ref_t ref, struct page **pagep);
++void __gnttab_dma_map_page(struct page *page);
++static inline void __gnttab_dma_unmap_page(struct page *page)
++{
++}
++
++void gnttab_reset_grant_page(struct page *page);
++
++int gnttab_suspend(void);
++int gnttab_resume(void);
++
++void *arch_gnttab_alloc_shared(unsigned long *frames);
++
++static inline void
++gnttab_set_map_op(struct gnttab_map_grant_ref *map, maddr_t addr,
++ uint32_t flags, grant_ref_t ref, domid_t domid)
++{
++ if (flags & GNTMAP_contains_pte)
++ map->host_addr = addr;
++ else if (xen_feature(XENFEAT_auto_translated_physmap))
++ map->host_addr = __pa(addr);
++ else
++ map->host_addr = addr;
++
++ map->flags = flags;
++ map->ref = ref;
++ map->dom = domid;
++}
++
++static inline void
++gnttab_set_unmap_op(struct gnttab_unmap_grant_ref *unmap, maddr_t addr,
++ uint32_t flags, grant_handle_t handle)
++{
++ if (flags & GNTMAP_contains_pte)
++ unmap->host_addr = addr;
++ else if (xen_feature(XENFEAT_auto_translated_physmap))
++ unmap->host_addr = __pa(addr);
++ else
++ unmap->host_addr = addr;
++
++ unmap->handle = handle;
++ unmap->dev_bus_addr = 0;
++}
++
++static inline void
++gnttab_set_replace_op(struct gnttab_unmap_and_replace *unmap, maddr_t addr,
++ maddr_t new_addr, grant_handle_t handle)
++{
++ if (xen_feature(XENFEAT_auto_translated_physmap)) {
++ unmap->host_addr = __pa(addr);
++ unmap->new_addr = __pa(new_addr);
++ } else {
++ unmap->host_addr = addr;
++ unmap->new_addr = new_addr;
++ }
++
++ unmap->handle = handle;
++}
++
++#endif /* __ASM_GNTTAB_H__ */
+Index: head-2008-11-25/include/xen/hvm.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/hvm.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,23 @@
++/* Simple wrappers around HVM functions */
++#ifndef XEN_HVM_H__
++#define XEN_HVM_H__
++
++#include <xen/interface/hvm/params.h>
++
++static inline unsigned long hvm_get_parameter(int idx)
++{
++ struct xen_hvm_param xhv;
++ int r;
++
++ xhv.domid = DOMID_SELF;
++ xhv.index = idx;
++ r = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv);
++ if (r < 0) {
++ printk(KERN_ERR "cannot get hvm parameter %d: %d.\n",
++ idx, r);
++ return 0;
++ }
++ return xhv.value;
++}
++
++#endif /* XEN_HVM_H__ */
+Index: head-2008-11-25/include/xen/hypercall.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/hypercall.h 2008-01-28 12:24:19.000000000 +0100
+@@ -0,0 +1,30 @@
++#ifndef __XEN_HYPERCALL_H__
++#define __XEN_HYPERCALL_H__
++
++#include <asm/hypercall.h>
++
++static inline int __must_check
++HYPERVISOR_multicall_check(
++ multicall_entry_t *call_list, unsigned int nr_calls,
++ const unsigned long *rc_list)
++{
++ int rc = HYPERVISOR_multicall(call_list, nr_calls);
++
++ if (unlikely(rc < 0))
++ return rc;
++ BUG_ON(rc);
++ BUG_ON((int)nr_calls < 0);
++
++ for ( ; nr_calls > 0; --nr_calls, ++call_list)
++ if (unlikely(call_list->result != (rc_list ? *rc_list++ : 0)))
++ return nr_calls;
++
++ return 0;
++}
++
++/* A construct to ignore the return value of hypercall wrappers in a few
++ * exceptional cases (simply casting the function result to void doesn't
++ * avoid the compiler warning): */
++#define VOID(expr) ((void)((expr)?:0))
++
++#endif /* __XEN_HYPERCALL_H__ */
+Index: head-2008-11-25/include/xen/hypervisor_sysfs.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/hypervisor_sysfs.h 2007-06-22 09:08:06.000000000 +0200
+@@ -0,0 +1,30 @@
++/*
++ * copyright (c) 2006 IBM Corporation
++ * Authored by: Mike D. Day <ncmike@us.ibm.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#ifndef _HYP_SYSFS_H_
++#define _HYP_SYSFS_H_
++
++#include <linux/kobject.h>
++#include <linux/sysfs.h>
++
++#define HYPERVISOR_ATTR_RO(_name) \
++static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
++
++#define HYPERVISOR_ATTR_RW(_name) \
++static struct hyp_sysfs_attr _name##_attr = \
++ __ATTR(_name, 0644, _name##_show, _name##_store)
++
++struct hyp_sysfs_attr {
++ struct attribute attr;
++ ssize_t (*show)(struct hyp_sysfs_attr *, char *);
++ ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t);
++ void *hyp_attr_data;
++};
++
++#endif /* _HYP_SYSFS_H_ */
+Index: head-2008-11-25/include/xen/pcifront.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/pcifront.h 2007-06-18 08:38:13.000000000 +0200
+@@ -0,0 +1,83 @@
++/*
++ * PCI Frontend - arch-dependendent declarations
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#ifndef __XEN_ASM_PCIFRONT_H__
++#define __XEN_ASM_PCIFRONT_H__
++
++#include <linux/spinlock.h>
++
++#ifdef __KERNEL__
++
++#ifndef __ia64__
++
++struct pcifront_device;
++struct pci_bus;
++
++struct pcifront_sd {
++ int domain;
++ struct pcifront_device *pdev;
++};
++
++static inline struct pcifront_device *
++pcifront_get_pdev(struct pcifront_sd *sd)
++{
++ return sd->pdev;
++}
++
++static inline void pcifront_init_sd(struct pcifront_sd *sd,
++ unsigned int domain, unsigned int bus,
++ struct pcifront_device *pdev)
++{
++ sd->domain = domain;
++ sd->pdev = pdev;
++}
++
++#if defined(CONFIG_PCI_DOMAINS)
++static inline int pci_domain_nr(struct pci_bus *bus)
++{
++ struct pcifront_sd *sd = bus->sysdata;
++ return sd->domain;
++}
++static inline int pci_proc_domain(struct pci_bus *bus)
++{
++ return pci_domain_nr(bus);
++}
++#endif /* CONFIG_PCI_DOMAINS */
++
++static inline void pcifront_setup_root_resources(struct pci_bus *bus,
++ struct pcifront_sd *sd)
++{
++}
++
++#else /* __ia64__ */
++
++#include <linux/acpi.h>
++#include <asm/pci.h>
++#define pcifront_sd pci_controller
++
++extern void xen_add_resource(struct pci_controller *, unsigned int,
++ unsigned int, struct acpi_resource *);
++extern void xen_pcibios_setup_root_windows(struct pci_bus *,
++ struct pci_controller *);
++
++static inline struct pcifront_device *
++pcifront_get_pdev(struct pcifront_sd *sd)
++{
++ return (struct pcifront_device *)sd->platform_data;
++}
++
++static inline void pcifront_setup_root_resources(struct pci_bus *bus,
++ struct pcifront_sd *sd)
++{
++ xen_pcibios_setup_root_windows(bus, sd);
++}
++
++#endif /* __ia64__ */
++
++extern struct rw_semaphore pci_bus_sem;
++
++#endif /* __KERNEL__ */
++
++#endif /* __XEN_ASM_PCIFRONT_H__ */
+Index: head-2008-11-25/include/xen/public/evtchn.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/public/evtchn.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,88 @@
++/******************************************************************************
++ * evtchn.h
++ *
++ * Interface to /dev/xen/evtchn.
++ *
++ * Copyright (c) 2003-2005, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __LINUX_PUBLIC_EVTCHN_H__
++#define __LINUX_PUBLIC_EVTCHN_H__
++
++/*
++ * Bind a fresh port to VIRQ @virq.
++ * Return allocated port.
++ */
++#define IOCTL_EVTCHN_BIND_VIRQ \
++ _IOC(_IOC_NONE, 'E', 0, sizeof(struct ioctl_evtchn_bind_virq))
++struct ioctl_evtchn_bind_virq {
++ unsigned int virq;
++};
++
++/*
++ * Bind a fresh port to remote <@remote_domain, @remote_port>.
++ * Return allocated port.
++ */
++#define IOCTL_EVTCHN_BIND_INTERDOMAIN \
++ _IOC(_IOC_NONE, 'E', 1, sizeof(struct ioctl_evtchn_bind_interdomain))
++struct ioctl_evtchn_bind_interdomain {
++ unsigned int remote_domain, remote_port;
++};
++
++/*
++ * Allocate a fresh port for binding to @remote_domain.
++ * Return allocated port.
++ */
++#define IOCTL_EVTCHN_BIND_UNBOUND_PORT \
++ _IOC(_IOC_NONE, 'E', 2, sizeof(struct ioctl_evtchn_bind_unbound_port))
++struct ioctl_evtchn_bind_unbound_port {
++ unsigned int remote_domain;
++};
++
++/*
++ * Unbind previously allocated @port.
++ */
++#define IOCTL_EVTCHN_UNBIND \
++ _IOC(_IOC_NONE, 'E', 3, sizeof(struct ioctl_evtchn_unbind))
++struct ioctl_evtchn_unbind {
++ unsigned int port;
++};
++
++/*
++ * Unbind previously allocated @port.
++ */
++#define IOCTL_EVTCHN_NOTIFY \
++ _IOC(_IOC_NONE, 'E', 4, sizeof(struct ioctl_evtchn_notify))
++struct ioctl_evtchn_notify {
++ unsigned int port;
++};
++
++/* Clear and reinitialise the event buffer. Clear error condition. */
++#define IOCTL_EVTCHN_RESET \
++ _IOC(_IOC_NONE, 'E', 5, 0)
++
++#endif /* __LINUX_PUBLIC_EVTCHN_H__ */
+Index: head-2008-11-25/include/xen/public/gntdev.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/public/gntdev.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,119 @@
++/******************************************************************************
++ * gntdev.h
++ *
++ * Interface to /dev/xen/gntdev.
++ *
++ * Copyright (c) 2007, D G Murray
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __LINUX_PUBLIC_GNTDEV_H__
++#define __LINUX_PUBLIC_GNTDEV_H__
++
++struct ioctl_gntdev_grant_ref {
++ /* The domain ID of the grant to be mapped. */
++ uint32_t domid;
++ /* The grant reference of the grant to be mapped. */
++ uint32_t ref;
++};
++
++/*
++ * Inserts the grant references into the mapping table of an instance
++ * of gntdev. N.B. This does not perform the mapping, which is deferred
++ * until mmap() is called with @index as the offset.
++ */
++#define IOCTL_GNTDEV_MAP_GRANT_REF \
++_IOC(_IOC_NONE, 'G', 0, sizeof(struct ioctl_gntdev_map_grant_ref))
++struct ioctl_gntdev_map_grant_ref {
++ /* IN parameters */
++ /* The number of grants to be mapped. */
++ uint32_t count;
++ uint32_t pad;
++ /* OUT parameters */
++ /* The offset to be used on a subsequent call to mmap(). */
++ uint64_t index;
++ /* Variable IN parameter. */
++ /* Array of grant references, of size @count. */
++ struct ioctl_gntdev_grant_ref refs[1];
++};
++
++/*
++ * Removes the grant references from the mapping table of an instance of
++ * of gntdev. N.B. munmap() must be called on the relevant virtual address(es)
++ * before this ioctl is called, or an error will result.
++ */
++#define IOCTL_GNTDEV_UNMAP_GRANT_REF \
++_IOC(_IOC_NONE, 'G', 1, sizeof(struct ioctl_gntdev_unmap_grant_ref))
++struct ioctl_gntdev_unmap_grant_ref {
++ /* IN parameters */
++ /* The offset was returned by the corresponding map operation. */
++ uint64_t index;
++ /* The number of pages to be unmapped. */
++ uint32_t count;
++ uint32_t pad;
++};
++
++/*
++ * Returns the offset in the driver's address space that corresponds
++ * to @vaddr. This can be used to perform a munmap(), followed by an
++ * UNMAP_GRANT_REF ioctl, where no state about the offset is retained by
++ * the caller. The number of pages that were allocated at the same time as
++ * @vaddr is returned in @count.
++ *
++ * N.B. Where more than one page has been mapped into a contiguous range, the
++ * supplied @vaddr must correspond to the start of the range; otherwise
++ * an error will result. It is only possible to munmap() the entire
++ * contiguously-allocated range at once, and not any subrange thereof.
++ */
++#define IOCTL_GNTDEV_GET_OFFSET_FOR_VADDR \
++_IOC(_IOC_NONE, 'G', 2, sizeof(struct ioctl_gntdev_get_offset_for_vaddr))
++struct ioctl_gntdev_get_offset_for_vaddr {
++ /* IN parameters */
++ /* The virtual address of the first mapped page in a range. */
++ uint64_t vaddr;
++ /* OUT parameters */
++ /* The offset that was used in the initial mmap() operation. */
++ uint64_t offset;
++ /* The number of pages mapped in the VM area that begins at @vaddr. */
++ uint32_t count;
++ uint32_t pad;
++};
++
++/*
++ * Sets the maximum number of grants that may mapped at once by this gntdev
++ * instance.
++ *
++ * N.B. This must be called before any other ioctl is performed on the device.
++ */
++#define IOCTL_GNTDEV_SET_MAX_GRANTS \
++_IOC(_IOC_NONE, 'G', 3, sizeof(struct ioctl_gntdev_set_max_grants))
++struct ioctl_gntdev_set_max_grants {
++ /* IN parameter */
++ /* The maximum number of grants that may be mapped at once. */
++ uint32_t count;
++};
++
++#endif /* __LINUX_PUBLIC_GNTDEV_H__ */
+Index: head-2008-11-25/include/xen/public/privcmd.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/public/privcmd.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,79 @@
++/******************************************************************************
++ * privcmd.h
++ *
++ * Interface to /proc/xen/privcmd.
++ *
++ * Copyright (c) 2003-2005, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __LINUX_PUBLIC_PRIVCMD_H__
++#define __LINUX_PUBLIC_PRIVCMD_H__
++
++#include <linux/types.h>
++
++#ifndef __user
++#define __user
++#endif
++
++typedef struct privcmd_hypercall
++{
++ __u64 op;
++ __u64 arg[5];
++} privcmd_hypercall_t;
++
++typedef struct privcmd_mmap_entry {
++ __u64 va;
++ __u64 mfn;
++ __u64 npages;
++} privcmd_mmap_entry_t;
++
++typedef struct privcmd_mmap {
++ int num;
++ domid_t dom; /* target domain */
++ privcmd_mmap_entry_t __user *entry;
++} privcmd_mmap_t;
++
++typedef struct privcmd_mmapbatch {
++ int num; /* number of pages to populate */
++ domid_t dom; /* target domain */
++ __u64 addr; /* virtual address */
++ xen_pfn_t __user *arr; /* array of mfns - top nibble set on err */
++} privcmd_mmapbatch_t;
++
++/*
++ * @cmd: IOCTL_PRIVCMD_HYPERCALL
++ * @arg: &privcmd_hypercall_t
++ * Return: Value returned from execution of the specified hypercall.
++ */
++#define IOCTL_PRIVCMD_HYPERCALL \
++ _IOC(_IOC_NONE, 'P', 0, sizeof(privcmd_hypercall_t))
++#define IOCTL_PRIVCMD_MMAP \
++ _IOC(_IOC_NONE, 'P', 2, sizeof(privcmd_mmap_t))
++#define IOCTL_PRIVCMD_MMAPBATCH \
++ _IOC(_IOC_NONE, 'P', 3, sizeof(privcmd_mmapbatch_t))
++
++#endif /* __LINUX_PUBLIC_PRIVCMD_H__ */
+Index: head-2008-11-25/include/xen/xen_proc.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/xen_proc.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,12 @@
++
++#ifndef __ASM_XEN_PROC_H__
++#define __ASM_XEN_PROC_H__
++
++#include <linux/proc_fs.h>
++
++extern struct proc_dir_entry *create_xen_proc_entry(
++ const char *name, mode_t mode);
++extern void remove_xen_proc_entry(
++ const char *name);
++
++#endif /* __ASM_XEN_PROC_H__ */
+Index: head-2008-11-25/include/xen/xencons.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/xencons.h 2007-10-15 09:39:38.000000000 +0200
+@@ -0,0 +1,17 @@
++#ifndef __ASM_XENCONS_H__
++#define __ASM_XENCONS_H__
++
++struct dom0_vga_console_info;
++void dom0_init_screen_info(const struct dom0_vga_console_info *, size_t);
++
++void xencons_force_flush(void);
++void xencons_resume(void);
++
++/* Interrupt work hooks. Receive data, or kick data out. */
++void xencons_rx(char *buf, unsigned len, struct pt_regs *regs);
++void xencons_tx(void);
++
++int xencons_ring_init(void);
++int xencons_ring_send(const char *data, unsigned len);
++
++#endif /* __ASM_XENCONS_H__ */
+Index: head-2008-11-25/include/xen/xenoprof.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/xenoprof.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,42 @@
++/******************************************************************************
++ * xen/xenoprof.h
++ *
++ * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
++ * VA Linux Systems Japan K.K.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ */
++
++#ifndef __XEN_XENOPROF_H__
++#define __XEN_XENOPROF_H__
++#ifdef CONFIG_XEN
++
++#include <asm/xenoprof.h>
++
++struct oprofile_operations;
++int xenoprofile_init(struct oprofile_operations * ops);
++void xenoprofile_exit(void);
++
++struct xenoprof_shared_buffer {
++ char *buffer;
++ struct xenoprof_arch_shared_buffer arch;
++};
++#else
++#define xenoprofile_init(ops) (-ENOSYS)
++#define xenoprofile_exit() do { } while (0)
++
++#endif /* CONFIG_XEN */
++#endif /* __XEN_XENOPROF_H__ */
+Index: head-2008-11-25/lib/swiotlb-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/lib/swiotlb-xen.c 2008-09-15 13:40:15.000000000 +0200
+@@ -0,0 +1,739 @@
++/*
++ * Dynamic DMA mapping support.
++ *
++ * This implementation is a fallback for platforms that do not support
++ * I/O TLBs (aka DMA address translation hardware).
++ * Copyright (C) 2000 Asit Mallick <Asit.K.Mallick@intel.com>
++ * Copyright (C) 2000 Goutham Rao <goutham.rao@intel.com>
++ * Copyright (C) 2000, 2003 Hewlett-Packard Co
++ * David Mosberger-Tang <davidm@hpl.hp.com>
++ * Copyright (C) 2005 Keir Fraser <keir@xensource.com>
++ */
++
++#include <linux/cache.h>
++#include <linux/mm.h>
++#include <linux/module.h>
++#include <linux/pci.h>
++#include <linux/spinlock.h>
++#include <linux/string.h>
++#include <linux/types.h>
++#include <linux/ctype.h>
++#include <linux/init.h>
++#include <linux/bootmem.h>
++#include <linux/highmem.h>
++#include <asm/io.h>
++#include <asm/pci.h>
++#include <asm/dma.h>
++#include <asm/uaccess.h>
++#include <xen/gnttab.h>
++#include <xen/interface/memory.h>
++#include <asm-i386/mach-xen/asm/gnttab_dma.h>
++
++int swiotlb;
++EXPORT_SYMBOL(swiotlb);
++
++#define OFFSET(val,align) ((unsigned long)((val) & ( (align) - 1)))
++
++/*
++ * Maximum allowable number of contiguous slabs to map,
++ * must be a power of 2. What is the appropriate value ?
++ * The complexity of {map,unmap}_single is linearly dependent on this value.
++ */
++#define IO_TLB_SEGSIZE 128
++
++/*
++ * log of the size of each IO TLB slab. The number of slabs is command line
++ * controllable.
++ */
++#define IO_TLB_SHIFT 11
++
++int swiotlb_force;
++
++static char *iotlb_virt_start;
++static unsigned long iotlb_nslabs;
++
++/*
++ * Used to do a quick range check in swiotlb_unmap_single and
++ * swiotlb_sync_single_*, to see if the memory was in fact allocated by this
++ * API.
++ */
++static unsigned long iotlb_pfn_start, iotlb_pfn_end;
++
++/* Does the given dma address reside within the swiotlb aperture? */
++static inline int in_swiotlb_aperture(dma_addr_t dev_addr)
++{
++ unsigned long pfn = mfn_to_local_pfn(dev_addr >> PAGE_SHIFT);
++ return (pfn_valid(pfn)
++ && (pfn >= iotlb_pfn_start)
++ && (pfn < iotlb_pfn_end));
++}
++
++/*
++ * When the IOMMU overflows we return a fallback buffer. This sets the size.
++ */
++static unsigned long io_tlb_overflow = 32*1024;
++
++void *io_tlb_overflow_buffer;
++
++/*
++ * This is a free list describing the number of free entries available from
++ * each index
++ */
++static unsigned int *io_tlb_list;
++static unsigned int io_tlb_index;
++
++/*
++ * We need to save away the original address corresponding to a mapped entry
++ * for the sync operations.
++ */
++static struct phys_addr {
++ struct page *page;
++ unsigned int offset;
++} *io_tlb_orig_addr;
++
++/*
++ * Protect the above data structures in the map and unmap calls
++ */
++static DEFINE_SPINLOCK(io_tlb_lock);
++
++static unsigned int dma_bits;
++static unsigned int __initdata max_dma_bits = 32;
++static int __init
++setup_dma_bits(char *str)
++{
++ max_dma_bits = simple_strtoul(str, NULL, 0);
++ return 0;
++}
++__setup("dma_bits=", setup_dma_bits);
++
++static int __init
++setup_io_tlb_npages(char *str)
++{
++ /* Unlike ia64, the size is aperture in megabytes, not 'slabs'! */
++ if (isdigit(*str)) {
++ iotlb_nslabs = simple_strtoul(str, &str, 0) <<
++ (20 - IO_TLB_SHIFT);
++ iotlb_nslabs = ALIGN(iotlb_nslabs, IO_TLB_SEGSIZE);
++ }
++ if (*str == ',')
++ ++str;
++ /*
++ * NB. 'force' enables the swiotlb, but doesn't force its use for
++ * every DMA like it does on native Linux. 'off' forcibly disables
++ * use of the swiotlb.
++ */
++ if (!strcmp(str, "force"))
++ swiotlb_force = 1;
++ else if (!strcmp(str, "off"))
++ swiotlb_force = -1;
++ return 1;
++}
++__setup("swiotlb=", setup_io_tlb_npages);
++/* make io_tlb_overflow tunable too? */
++
++/*
++ * Statically reserve bounce buffer space and initialize bounce buffer data
++ * structures for the software IO TLB used to implement the PCI DMA API.
++ */
++void
++swiotlb_init_with_default_size (size_t default_size)
++{
++ unsigned long i, bytes;
++ int rc;
++
++ if (!iotlb_nslabs) {
++ iotlb_nslabs = (default_size >> IO_TLB_SHIFT);
++ iotlb_nslabs = ALIGN(iotlb_nslabs, IO_TLB_SEGSIZE);
++ }
++
++ bytes = iotlb_nslabs * (1UL << IO_TLB_SHIFT);
++
++ /*
++ * Get IO TLB memory from the low pages
++ */
++ iotlb_virt_start = alloc_bootmem_low_pages(bytes);
++ if (!iotlb_virt_start)
++ panic("Cannot allocate SWIOTLB buffer!\n");
++
++ dma_bits = get_order(IO_TLB_SEGSIZE << IO_TLB_SHIFT) + PAGE_SHIFT;
++ for (i = 0; i < iotlb_nslabs; i += IO_TLB_SEGSIZE) {
++ do {
++ rc = xen_create_contiguous_region(
++ (unsigned long)iotlb_virt_start + (i << IO_TLB_SHIFT),
++ get_order(IO_TLB_SEGSIZE << IO_TLB_SHIFT),
++ dma_bits);
++ } while (rc && dma_bits++ < max_dma_bits);
++ if (rc) {
++ if (i == 0)
++ panic("No suitable physical memory available for SWIOTLB buffer!\n"
++ "Use dom0_mem Xen boot parameter to reserve\n"
++ "some DMA memory (e.g., dom0_mem=-128M).\n");
++ iotlb_nslabs = i;
++ i <<= IO_TLB_SHIFT;
++ free_bootmem(__pa(iotlb_virt_start + i), bytes - i);
++ bytes = i;
++ for (dma_bits = 0; i > 0; i -= IO_TLB_SEGSIZE << IO_TLB_SHIFT) {
++ unsigned int bits = fls64(virt_to_bus(iotlb_virt_start + i - 1));
++
++ if (bits > dma_bits)
++ dma_bits = bits;
++ }
++ break;
++ }
++ }
++
++ /*
++ * Allocate and initialize the free list array. This array is used
++ * to find contiguous free memory regions of size up to IO_TLB_SEGSIZE.
++ */
++ io_tlb_list = alloc_bootmem(iotlb_nslabs * sizeof(int));
++ for (i = 0; i < iotlb_nslabs; i++)
++ io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
++ io_tlb_index = 0;
++ io_tlb_orig_addr = alloc_bootmem(
++ iotlb_nslabs * sizeof(*io_tlb_orig_addr));
++
++ /*
++ * Get the overflow emergency buffer
++ */
++ io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow);
++ if (!io_tlb_overflow_buffer)
++ panic("Cannot allocate SWIOTLB overflow buffer!\n");
++
++ do {
++ rc = xen_create_contiguous_region(
++ (unsigned long)io_tlb_overflow_buffer,
++ get_order(io_tlb_overflow),
++ dma_bits);
++ } while (rc && dma_bits++ < max_dma_bits);
++ if (rc)
++ panic("No suitable physical memory available for SWIOTLB overflow buffer!\n");
++
++ iotlb_pfn_start = __pa(iotlb_virt_start) >> PAGE_SHIFT;
++ iotlb_pfn_end = iotlb_pfn_start + (bytes >> PAGE_SHIFT);
++
++ printk(KERN_INFO "Software IO TLB enabled: \n"
++ " Aperture: %lu megabytes\n"
++ " Kernel range: %p - %p\n"
++ " Address size: %u bits\n",
++ bytes >> 20,
++ iotlb_virt_start, iotlb_virt_start + bytes,
++ dma_bits);
++}
++
++void
++swiotlb_init(void)
++{
++ long ram_end;
++ size_t defsz = 64 * (1 << 20); /* 64MB default size */
++
++ if (swiotlb_force == 1) {
++ swiotlb = 1;
++ } else if ((swiotlb_force != -1) &&
++ is_running_on_xen() &&
++ is_initial_xendomain()) {
++ /* Domain 0 always has a swiotlb. */
++ ram_end = HYPERVISOR_memory_op(XENMEM_maximum_ram_page, NULL);
++ if (ram_end <= 0x7ffff)
++ defsz = 2 * (1 << 20); /* 2MB on <2GB on systems. */
++ swiotlb = 1;
++ }
++
++ if (swiotlb)
++ swiotlb_init_with_default_size(defsz);
++ else
++ printk(KERN_INFO "Software IO TLB disabled\n");
++}
++
++/*
++ * We use __copy_to_user_inatomic to transfer to the host buffer because the
++ * buffer may be mapped read-only (e.g, in blkback driver) but lower-level
++ * drivers map the buffer for DMA_BIDIRECTIONAL access. This causes an
++ * unnecessary copy from the aperture to the host buffer, and a page fault.
++ */
++static void
++__sync_single(struct phys_addr buffer, char *dma_addr, size_t size, int dir)
++{
++ if (PageHighMem(buffer.page)) {
++ size_t len, bytes;
++ char *dev, *host, *kmp;
++ len = size;
++ while (len != 0) {
++ unsigned long flags;
++
++ if (((bytes = len) + buffer.offset) > PAGE_SIZE)
++ bytes = PAGE_SIZE - buffer.offset;
++ local_irq_save(flags); /* protects KM_BOUNCE_READ */
++ kmp = kmap_atomic(buffer.page, KM_BOUNCE_READ);
++ dev = dma_addr + size - len;
++ host = kmp + buffer.offset;
++ if (dir == DMA_FROM_DEVICE) {
++ if (__copy_to_user_inatomic(host, dev, bytes))
++ /* inaccessible */;
++ } else
++ memcpy(dev, host, bytes);
++ kunmap_atomic(kmp, KM_BOUNCE_READ);
++ local_irq_restore(flags);
++ len -= bytes;
++ buffer.page++;
++ buffer.offset = 0;
++ }
++ } else {
++ char *host = (char *)phys_to_virt(
++ page_to_pseudophys(buffer.page)) + buffer.offset;
++ if (dir == DMA_FROM_DEVICE) {
++ if (__copy_to_user_inatomic(host, dma_addr, size))
++ /* inaccessible */;
++ } else if (dir == DMA_TO_DEVICE)
++ memcpy(dma_addr, host, size);
++ }
++}
++
++/*
++ * Allocates bounce buffer and returns its kernel virtual address.
++ */
++static void *
++map_single(struct device *hwdev, struct phys_addr buffer, size_t size, int dir)
++{
++ unsigned long flags;
++ char *dma_addr;
++ unsigned int nslots, stride, index, wrap;
++ struct phys_addr slot_buf;
++ int i;
++
++ /*
++ * For mappings greater than a page, we limit the stride (and
++ * hence alignment) to a page size.
++ */
++ nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT;
++ if (size > PAGE_SIZE)
++ stride = (1 << (PAGE_SHIFT - IO_TLB_SHIFT));
++ else
++ stride = 1;
++
++ BUG_ON(!nslots);
++
++ /*
++ * Find suitable number of IO TLB entries size that will fit this
++ * request and allocate a buffer from that IO TLB pool.
++ */
++ spin_lock_irqsave(&io_tlb_lock, flags);
++ {
++ wrap = index = ALIGN(io_tlb_index, stride);
++
++ if (index >= iotlb_nslabs)
++ wrap = index = 0;
++
++ do {
++ /*
++ * If we find a slot that indicates we have 'nslots'
++ * number of contiguous buffers, we allocate the
++ * buffers from that slot and mark the entries as '0'
++ * indicating unavailable.
++ */
++ if (io_tlb_list[index] >= nslots) {
++ int count = 0;
++
++ for (i = index; i < (int)(index + nslots); i++)
++ io_tlb_list[i] = 0;
++ for (i = index - 1;
++ (OFFSET(i, IO_TLB_SEGSIZE) !=
++ IO_TLB_SEGSIZE -1) && io_tlb_list[i];
++ i--)
++ io_tlb_list[i] = ++count;
++ dma_addr = iotlb_virt_start +
++ (index << IO_TLB_SHIFT);
++
++ /*
++ * Update the indices to avoid searching in
++ * the next round.
++ */
++ io_tlb_index =
++ ((index + nslots) < iotlb_nslabs
++ ? (index + nslots) : 0);
++
++ goto found;
++ }
++ index += stride;
++ if (index >= iotlb_nslabs)
++ index = 0;
++ } while (index != wrap);
++
++ spin_unlock_irqrestore(&io_tlb_lock, flags);
++ return NULL;
++ }
++ found:
++ spin_unlock_irqrestore(&io_tlb_lock, flags);
++
++ /*
++ * Save away the mapping from the original address to the DMA address.
++ * This is needed when we sync the memory. Then we sync the buffer if
++ * needed.
++ */
++ slot_buf = buffer;
++ for (i = 0; i < nslots; i++) {
++ slot_buf.page += slot_buf.offset >> PAGE_SHIFT;
++ slot_buf.offset &= PAGE_SIZE - 1;
++ io_tlb_orig_addr[index+i] = slot_buf;
++ slot_buf.offset += 1 << IO_TLB_SHIFT;
++ }
++ if ((dir == DMA_TO_DEVICE) || (dir == DMA_BIDIRECTIONAL))
++ __sync_single(buffer, dma_addr, size, DMA_TO_DEVICE);
++
++ return dma_addr;
++}
++
++static struct phys_addr dma_addr_to_phys_addr(char *dma_addr)
++{
++ int index = (dma_addr - iotlb_virt_start) >> IO_TLB_SHIFT;
++ struct phys_addr buffer = io_tlb_orig_addr[index];
++ buffer.offset += (long)dma_addr & ((1 << IO_TLB_SHIFT) - 1);
++ buffer.page += buffer.offset >> PAGE_SHIFT;
++ buffer.offset &= PAGE_SIZE - 1;
++ return buffer;
++}
++
++/*
++ * dma_addr is the kernel virtual address of the bounce buffer to unmap.
++ */
++static void
++unmap_single(struct device *hwdev, char *dma_addr, size_t size, int dir)
++{
++ unsigned long flags;
++ int i, count, nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT;
++ int index = (dma_addr - iotlb_virt_start) >> IO_TLB_SHIFT;
++ struct phys_addr buffer = dma_addr_to_phys_addr(dma_addr);
++
++ /*
++ * First, sync the memory before unmapping the entry
++ */
++ if ((dir == DMA_FROM_DEVICE) || (dir == DMA_BIDIRECTIONAL))
++ __sync_single(buffer, dma_addr, size, DMA_FROM_DEVICE);
++
++ /*
++ * Return the buffer to the free list by setting the corresponding
++ * entries to indicate the number of contigous entries available.
++ * While returning the entries to the free list, we merge the entries
++ * with slots below and above the pool being returned.
++ */
++ spin_lock_irqsave(&io_tlb_lock, flags);
++ {
++ count = ((index + nslots) < ALIGN(index + 1, IO_TLB_SEGSIZE) ?
++ io_tlb_list[index + nslots] : 0);
++ /*
++ * Step 1: return the slots to the free list, merging the
++ * slots with superceeding slots
++ */
++ for (i = index + nslots - 1; i >= index; i--)
++ io_tlb_list[i] = ++count;
++ /*
++ * Step 2: merge the returned slots with the preceding slots,
++ * if available (non zero)
++ */
++ for (i = index - 1;
++ (OFFSET(i, IO_TLB_SEGSIZE) !=
++ IO_TLB_SEGSIZE -1) && io_tlb_list[i];
++ i--)
++ io_tlb_list[i] = ++count;
++ }
++ spin_unlock_irqrestore(&io_tlb_lock, flags);
++}
++
++static void
++sync_single(struct device *hwdev, char *dma_addr, size_t size, int dir)
++{
++ struct phys_addr buffer = dma_addr_to_phys_addr(dma_addr);
++ BUG_ON((dir != DMA_FROM_DEVICE) && (dir != DMA_TO_DEVICE));
++ __sync_single(buffer, dma_addr, size, dir);
++}
++
++static void
++swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
++{
++ /*
++ * Ran out of IOMMU space for this operation. This is very bad.
++ * Unfortunately the drivers cannot handle this operation properly.
++ * unless they check for pci_dma_mapping_error (most don't)
++ * When the mapping is small enough return a static buffer to limit
++ * the damage, or panic when the transfer is too big.
++ */
++ printk(KERN_ERR "PCI-DMA: Out of SW-IOMMU space for %lu bytes at "
++ "device %s\n", (unsigned long)size, dev ? dev->bus_id : "?");
++
++ if (size > io_tlb_overflow && do_panic) {
++ if (dir == PCI_DMA_FROMDEVICE || dir == PCI_DMA_BIDIRECTIONAL)
++ panic("PCI-DMA: Memory would be corrupted\n");
++ if (dir == PCI_DMA_TODEVICE || dir == PCI_DMA_BIDIRECTIONAL)
++ panic("PCI-DMA: Random memory would be DMAed\n");
++ }
++}
++
++/*
++ * Map a single buffer of the indicated size for DMA in streaming mode. The
++ * PCI address to use is returned.
++ *
++ * Once the device is given the dma address, the device owns this memory until
++ * either swiotlb_unmap_single or swiotlb_dma_sync_single is performed.
++ */
++dma_addr_t
++swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir)
++{
++ dma_addr_t dev_addr = gnttab_dma_map_page(virt_to_page(ptr)) +
++ offset_in_page(ptr);
++ void *map;
++ struct phys_addr buffer;
++
++ BUG_ON(dir == DMA_NONE);
++
++ /*
++ * If the pointer passed in happens to be in the device's DMA window,
++ * we can safely return the device addr and not worry about bounce
++ * buffering it.
++ */
++ if (!range_straddles_page_boundary(__pa(ptr), size) &&
++ !address_needs_mapping(hwdev, dev_addr))
++ return dev_addr;
++
++ /*
++ * Oh well, have to allocate and map a bounce buffer.
++ */
++ gnttab_dma_unmap_page(dev_addr);
++ buffer.page = virt_to_page(ptr);
++ buffer.offset = (unsigned long)ptr & ~PAGE_MASK;
++ map = map_single(hwdev, buffer, size, dir);
++ if (!map) {
++ swiotlb_full(hwdev, size, dir, 1);
++ map = io_tlb_overflow_buffer;
++ }
++
++ dev_addr = virt_to_bus(map);
++ return dev_addr;
++}
++
++/*
++ * Unmap a single streaming mode DMA translation. The dma_addr and size must
++ * match what was provided for in a previous swiotlb_map_single call. All
++ * other usages are undefined.
++ *
++ * After this call, reads by the cpu to the buffer are guaranteed to see
++ * whatever the device wrote there.
++ */
++void
++swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size,
++ int dir)
++{
++ BUG_ON(dir == DMA_NONE);
++ if (in_swiotlb_aperture(dev_addr))
++ unmap_single(hwdev, bus_to_virt(dev_addr), size, dir);
++ else
++ gnttab_dma_unmap_page(dev_addr);
++}
++
++/*
++ * Make physical memory consistent for a single streaming mode DMA translation
++ * after a transfer.
++ *
++ * If you perform a swiotlb_map_single() but wish to interrogate the buffer
++ * using the cpu, yet do not wish to teardown the PCI dma mapping, you must
++ * call this function before doing so. At the next point you give the PCI dma
++ * address back to the card, you must first perform a
++ * swiotlb_dma_sync_for_device, and then the device again owns the buffer
++ */
++void
++swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
++ size_t size, int dir)
++{
++ BUG_ON(dir == DMA_NONE);
++ if (in_swiotlb_aperture(dev_addr))
++ sync_single(hwdev, bus_to_virt(dev_addr), size, dir);
++}
++
++void
++swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
++ size_t size, int dir)
++{
++ BUG_ON(dir == DMA_NONE);
++ if (in_swiotlb_aperture(dev_addr))
++ sync_single(hwdev, bus_to_virt(dev_addr), size, dir);
++}
++
++/*
++ * Map a set of buffers described by scatterlist in streaming mode for DMA.
++ * This is the scatter-gather version of the above swiotlb_map_single
++ * interface. Here the scatter gather list elements are each tagged with the
++ * appropriate dma address and length. They are obtained via
++ * sg_dma_{address,length}(SG).
++ *
++ * NOTE: An implementation may be able to use a smaller number of
++ * DMA address/length pairs than there are SG table elements.
++ * (for example via virtual mapping capabilities)
++ * The routine returns the number of addr/length pairs actually
++ * used, at most nents.
++ *
++ * Device ownership issues as mentioned above for swiotlb_map_single are the
++ * same here.
++ */
++int
++swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nelems,
++ int dir)
++{
++ struct phys_addr buffer;
++ dma_addr_t dev_addr;
++ char *map;
++ int i;
++
++ BUG_ON(dir == DMA_NONE);
++
++ for (i = 0; i < nelems; i++, sg++) {
++ dev_addr = gnttab_dma_map_page(sg->page) + sg->offset;
++
++ if (range_straddles_page_boundary(page_to_pseudophys(sg->page)
++ + sg->offset, sg->length)
++ || address_needs_mapping(hwdev, dev_addr)) {
++ gnttab_dma_unmap_page(dev_addr);
++ buffer.page = sg->page;
++ buffer.offset = sg->offset;
++ map = map_single(hwdev, buffer, sg->length, dir);
++ if (!map) {
++ /* Don't panic here, we expect map_sg users
++ to do proper error handling. */
++ swiotlb_full(hwdev, sg->length, dir, 0);
++ swiotlb_unmap_sg(hwdev, sg - i, i, dir);
++ sg[0].dma_length = 0;
++ return 0;
++ }
++ sg->dma_address = (dma_addr_t)virt_to_bus(map);
++ } else
++ sg->dma_address = dev_addr;
++ sg->dma_length = sg->length;
++ }
++ return nelems;
++}
++
++/*
++ * Unmap a set of streaming mode DMA translations. Again, cpu read rules
++ * concerning calls here are the same as for swiotlb_unmap_single() above.
++ */
++void
++swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nelems,
++ int dir)
++{
++ int i;
++
++ BUG_ON(dir == DMA_NONE);
++
++ for (i = 0; i < nelems; i++, sg++)
++ if (in_swiotlb_aperture(sg->dma_address))
++ unmap_single(hwdev,
++ (void *)bus_to_virt(sg->dma_address),
++ sg->dma_length, dir);
++ else
++ gnttab_dma_unmap_page(sg->dma_address);
++}
++
++/*
++ * Make physical memory consistent for a set of streaming mode DMA translations
++ * after a transfer.
++ *
++ * The same as swiotlb_sync_single_* but for a scatter-gather list, same rules
++ * and usage.
++ */
++void
++swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
++ int nelems, int dir)
++{
++ int i;
++
++ BUG_ON(dir == DMA_NONE);
++
++ for (i = 0; i < nelems; i++, sg++)
++ if (in_swiotlb_aperture(sg->dma_address))
++ sync_single(hwdev,
++ (void *)bus_to_virt(sg->dma_address),
++ sg->dma_length, dir);
++}
++
++void
++swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
++ int nelems, int dir)
++{
++ int i;
++
++ BUG_ON(dir == DMA_NONE);
++
++ for (i = 0; i < nelems; i++, sg++)
++ if (in_swiotlb_aperture(sg->dma_address))
++ sync_single(hwdev,
++ (void *)bus_to_virt(sg->dma_address),
++ sg->dma_length, dir);
++}
++
++#ifdef CONFIG_HIGHMEM
++
++dma_addr_t
++swiotlb_map_page(struct device *hwdev, struct page *page,
++ unsigned long offset, size_t size,
++ enum dma_data_direction direction)
++{
++ struct phys_addr buffer;
++ dma_addr_t dev_addr;
++ char *map;
++
++ dev_addr = gnttab_dma_map_page(page) + offset;
++ if (address_needs_mapping(hwdev, dev_addr)) {
++ gnttab_dma_unmap_page(dev_addr);
++ buffer.page = page;
++ buffer.offset = offset;
++ map = map_single(hwdev, buffer, size, direction);
++ if (!map) {
++ swiotlb_full(hwdev, size, direction, 1);
++ map = io_tlb_overflow_buffer;
++ }
++ dev_addr = (dma_addr_t)virt_to_bus(map);
++ }
++
++ return dev_addr;
++}
++
++void
++swiotlb_unmap_page(struct device *hwdev, dma_addr_t dma_address,
++ size_t size, enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++ if (in_swiotlb_aperture(dma_address))
++ unmap_single(hwdev, bus_to_virt(dma_address), size, direction);
++ else
++ gnttab_dma_unmap_page(dma_address);
++}
++
++#endif
++
++int
++swiotlb_dma_mapping_error(dma_addr_t dma_addr)
++{
++ return (dma_addr == virt_to_bus(io_tlb_overflow_buffer));
++}
++
++/*
++ * Return whether the given PCI device DMA address mask can be supported
++ * properly. For example, if your device can only drive the low 24-bits
++ * during PCI bus mastering, then you would pass 0x00ffffff as the mask to
++ * this function.
++ */
++int
++swiotlb_dma_supported (struct device *hwdev, u64 mask)
++{
++ return (mask >= ((1UL << dma_bits) - 1));
++}
++
++EXPORT_SYMBOL(swiotlb_init);
++EXPORT_SYMBOL(swiotlb_map_single);
++EXPORT_SYMBOL(swiotlb_unmap_single);
++EXPORT_SYMBOL(swiotlb_map_sg);
++EXPORT_SYMBOL(swiotlb_unmap_sg);
++EXPORT_SYMBOL(swiotlb_sync_single_for_cpu);
++EXPORT_SYMBOL(swiotlb_sync_single_for_device);
++EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu);
++EXPORT_SYMBOL(swiotlb_sync_sg_for_device);
++EXPORT_SYMBOL(swiotlb_dma_mapping_error);
++EXPORT_SYMBOL(swiotlb_dma_supported);
+Index: head-2008-11-25/scripts/Makefile.xen.awk
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/scripts/Makefile.xen.awk 2007-08-06 15:10:49.000000000 +0200
+@@ -0,0 +1,34 @@
++BEGIN {
++ is_rule = 0
++}
++
++/^[[:space:]]*#/ {
++ next
++}
++
++/^[[:space:]]*$/ {
++ if (is_rule)
++ print("")
++ is_rule = 0
++ next
++}
++
++/:[[:space:]]*%\.[cS][[:space:]]/ {
++ line = gensub(/%.([cS])/, "%-xen.\\1", "g", $0)
++ line = gensub(/(single-used-m)/, "xen-\\1", "g", line)
++ print line
++ is_rule = 1
++ next
++}
++
++/^[^\t]$/ {
++ if (is_rule)
++ print("")
++ is_rule = 0
++ next
++}
++
++is_rule {
++ print $0
++ next
++}
--- /dev/null
+Subject: xen3 xen-drivers
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-11-25/drivers/xen/balloon/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/balloon/Makefile 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,2 @@
++
++obj-y := balloon.o sysfs.o
+Index: head-2008-11-25/drivers/xen/balloon/balloon.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/balloon/balloon.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,724 @@
++/******************************************************************************
++ * balloon.c
++ *
++ * Xen balloon driver - enables returning/claiming memory to/from Xen.
++ *
++ * Copyright (c) 2003, B Dragovic
++ * Copyright (c) 2003-2004, M Williamson, K Fraser
++ * Copyright (c) 2005 Dan M. Smith, IBM Corporation
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/sched.h>
++#include <linux/errno.h>
++#include <linux/mm.h>
++#include <linux/mman.h>
++#include <linux/smp_lock.h>
++#include <linux/pagemap.h>
++#include <linux/bootmem.h>
++#include <linux/highmem.h>
++#include <linux/vmalloc.h>
++#include <linux/mutex.h>
++#include <xen/xen_proc.h>
++#include <asm/hypervisor.h>
++#include <xen/balloon.h>
++#include <xen/interface/memory.h>
++#include <asm/maddr.h>
++#include <asm/page.h>
++#include <asm/pgalloc.h>
++#include <asm/pgtable.h>
++#include <asm/uaccess.h>
++#include <asm/tlb.h>
++#include <linux/highmem.h>
++#include <linux/list.h>
++#include <xen/xenbus.h>
++#include "common.h"
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++#ifdef CONFIG_PROC_FS
++static struct proc_dir_entry *balloon_pde;
++#endif
++
++static DEFINE_MUTEX(balloon_mutex);
++
++/*
++ * Protects atomic reservation decrease/increase against concurrent increases.
++ * Also protects non-atomic updates of current_pages and driver_pages, and
++ * balloon lists.
++ */
++DEFINE_SPINLOCK(balloon_lock);
++
++struct balloon_stats balloon_stats;
++
++/* We increase/decrease in batches which fit in a page */
++static unsigned long frame_list[PAGE_SIZE / sizeof(unsigned long)];
++
++/* VM /proc information for memory */
++extern unsigned long totalram_pages;
++
++#ifndef MODULE
++extern unsigned long totalhigh_pages;
++#define inc_totalhigh_pages() (totalhigh_pages++)
++#define dec_totalhigh_pages() (totalhigh_pages--)
++#else
++#define inc_totalhigh_pages() ((void)0)
++#define dec_totalhigh_pages() ((void)0)
++#endif
++
++/* List of ballooned pages, threaded through the mem_map array. */
++static LIST_HEAD(ballooned_pages);
++
++/* Main work function, always executed in process context. */
++static void balloon_process(void *unused);
++static DECLARE_WORK(balloon_worker, balloon_process, NULL);
++static struct timer_list balloon_timer;
++
++/* When ballooning out (allocating memory to return to Xen) we don't really
++ want the kernel to try too hard since that can trigger the oom killer. */
++#define GFP_BALLOON \
++ (GFP_HIGHUSER|__GFP_NOWARN|__GFP_NORETRY|__GFP_NOMEMALLOC|__GFP_COLD)
++
++#define PAGE_TO_LIST(p) (&(p)->lru)
++#define LIST_TO_PAGE(l) list_entry((l), struct page, lru)
++#define UNLIST_PAGE(p) \
++ do { \
++ list_del(PAGE_TO_LIST(p)); \
++ PAGE_TO_LIST(p)->next = NULL; \
++ PAGE_TO_LIST(p)->prev = NULL; \
++ } while(0)
++
++#define IPRINTK(fmt, args...) \
++ printk(KERN_INFO "xen_mem: " fmt, ##args)
++#define WPRINTK(fmt, args...) \
++ printk(KERN_WARNING "xen_mem: " fmt, ##args)
++
++/* balloon_append: add the given page to the balloon. */
++static void balloon_append(struct page *page)
++{
++ /* Lowmem is re-populated first, so highmem pages go at list tail. */
++ if (PageHighMem(page)) {
++ list_add_tail(PAGE_TO_LIST(page), &ballooned_pages);
++ bs.balloon_high++;
++ dec_totalhigh_pages();
++ } else {
++ list_add(PAGE_TO_LIST(page), &ballooned_pages);
++ bs.balloon_low++;
++ }
++}
++
++/* balloon_retrieve: rescue a page from the balloon, if it is not empty. */
++static struct page *balloon_retrieve(void)
++{
++ struct page *page;
++
++ if (list_empty(&ballooned_pages))
++ return NULL;
++
++ page = LIST_TO_PAGE(ballooned_pages.next);
++ UNLIST_PAGE(page);
++
++ if (PageHighMem(page)) {
++ bs.balloon_high--;
++ inc_totalhigh_pages();
++ }
++ else
++ bs.balloon_low--;
++
++ return page;
++}
++
++static struct page *balloon_first_page(void)
++{
++ if (list_empty(&ballooned_pages))
++ return NULL;
++ return LIST_TO_PAGE(ballooned_pages.next);
++}
++
++static struct page *balloon_next_page(struct page *page)
++{
++ struct list_head *next = PAGE_TO_LIST(page)->next;
++ if (next == &ballooned_pages)
++ return NULL;
++ return LIST_TO_PAGE(next);
++}
++
++static inline void balloon_free_page(struct page *page)
++{
++#ifndef MODULE
++ if (put_page_testzero(page))
++ free_cold_page(page);
++#else
++ /* free_cold_page() is not being exported. */
++ __free_page(page);
++#endif
++}
++
++static void balloon_alarm(unsigned long unused)
++{
++ schedule_work(&balloon_worker);
++}
++
++static unsigned long current_target(void)
++{
++ unsigned long target = min(bs.target_pages, bs.hard_limit);
++ if (target > (bs.current_pages + bs.balloon_low + bs.balloon_high))
++ target = bs.current_pages + bs.balloon_low + bs.balloon_high;
++ return target;
++}
++
++static unsigned long minimum_target(void)
++{
++#ifndef CONFIG_XEN
++#define max_pfn num_physpages
++#endif
++ unsigned long min_pages, curr_pages = current_target();
++
++#define MB2PAGES(mb) ((mb) << (20 - PAGE_SHIFT))
++ /* Simple continuous piecewiese linear function:
++ * max MiB -> min MiB gradient
++ * 0 0
++ * 16 16
++ * 32 24
++ * 128 72 (1/2)
++ * 512 168 (1/4)
++ * 2048 360 (1/8)
++ * 8192 552 (1/32)
++ * 32768 1320
++ * 131072 4392
++ */
++ if (max_pfn < MB2PAGES(128))
++ min_pages = MB2PAGES(8) + (max_pfn >> 1);
++ else if (max_pfn < MB2PAGES(512))
++ min_pages = MB2PAGES(40) + (max_pfn >> 2);
++ else if (max_pfn < MB2PAGES(2048))
++ min_pages = MB2PAGES(104) + (max_pfn >> 3);
++ else
++ min_pages = MB2PAGES(296) + (max_pfn >> 5);
++#undef MB2PAGES
++
++ /* Don't enforce growth */
++ return min(min_pages, curr_pages);
++#ifndef CONFIG_XEN
++#undef max_pfn
++#endif
++}
++
++static int increase_reservation(unsigned long nr_pages)
++{
++ unsigned long pfn, i, flags;
++ struct page *page;
++ long rc;
++ struct xen_memory_reservation reservation = {
++ .address_bits = 0,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ };
++
++ if (nr_pages > ARRAY_SIZE(frame_list))
++ nr_pages = ARRAY_SIZE(frame_list);
++
++ balloon_lock(flags);
++
++ page = balloon_first_page();
++ for (i = 0; i < nr_pages; i++) {
++ BUG_ON(page == NULL);
++ frame_list[i] = page_to_pfn(page);;
++ page = balloon_next_page(page);
++ }
++
++ set_xen_guest_handle(reservation.extent_start, frame_list);
++ reservation.nr_extents = nr_pages;
++ rc = HYPERVISOR_memory_op(
++ XENMEM_populate_physmap, &reservation);
++ if (rc < nr_pages) {
++ if (rc > 0) {
++ int ret;
++
++ /* We hit the Xen hard limit: reprobe. */
++ reservation.nr_extents = rc;
++ ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &reservation);
++ BUG_ON(ret != rc);
++ }
++ if (rc >= 0)
++ bs.hard_limit = (bs.current_pages + rc -
++ bs.driver_pages);
++ goto out;
++ }
++
++ for (i = 0; i < nr_pages; i++) {
++ page = balloon_retrieve();
++ BUG_ON(page == NULL);
++
++ pfn = page_to_pfn(page);
++ BUG_ON(!xen_feature(XENFEAT_auto_translated_physmap) &&
++ phys_to_machine_mapping_valid(pfn));
++
++ set_phys_to_machine(pfn, frame_list[i]);
++
++#ifdef CONFIG_XEN
++ /* Link back into the page tables if not highmem. */
++ if (pfn < max_low_pfn) {
++ int ret;
++ ret = HYPERVISOR_update_va_mapping(
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte_ma(frame_list[i], PAGE_KERNEL),
++ 0);
++ BUG_ON(ret);
++ }
++#endif
++
++ /* Relinquish the page back to the allocator. */
++ ClearPageReserved(page);
++ init_page_count(page);
++ balloon_free_page(page);
++ }
++
++ bs.current_pages += nr_pages;
++ totalram_pages = bs.current_pages;
++
++ out:
++ balloon_unlock(flags);
++
++ return 0;
++}
++
++static int decrease_reservation(unsigned long nr_pages)
++{
++ unsigned long pfn, i, flags;
++ struct page *page;
++ void *v;
++ int need_sleep = 0;
++ int ret;
++ struct xen_memory_reservation reservation = {
++ .address_bits = 0,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ };
++
++ if (nr_pages > ARRAY_SIZE(frame_list))
++ nr_pages = ARRAY_SIZE(frame_list);
++
++ for (i = 0; i < nr_pages; i++) {
++ if ((page = alloc_page(GFP_BALLOON)) == NULL) {
++ nr_pages = i;
++ need_sleep = 1;
++ break;
++ }
++
++ pfn = page_to_pfn(page);
++ frame_list[i] = pfn_to_mfn(pfn);
++
++ if (!PageHighMem(page)) {
++ v = phys_to_virt(pfn << PAGE_SHIFT);
++ scrub_pages(v, 1);
++#ifdef CONFIG_XEN
++ ret = HYPERVISOR_update_va_mapping(
++ (unsigned long)v, __pte_ma(0), 0);
++ BUG_ON(ret);
++#endif
++ }
++#ifdef CONFIG_XEN_SCRUB_PAGES
++ else {
++ v = kmap(page);
++ scrub_pages(v, 1);
++ kunmap(page);
++ }
++#endif
++ }
++
++#ifdef CONFIG_XEN
++ /* Ensure that ballooned highmem pages don't have kmaps. */
++ kmap_flush_unused();
++ flush_tlb_all();
++#endif
++
++ balloon_lock(flags);
++
++ /* No more mappings: invalidate P2M and add to balloon. */
++ for (i = 0; i < nr_pages; i++) {
++ pfn = mfn_to_pfn(frame_list[i]);
++ set_phys_to_machine(pfn, INVALID_P2M_ENTRY);
++ balloon_append(pfn_to_page(pfn));
++ }
++
++ set_xen_guest_handle(reservation.extent_start, frame_list);
++ reservation.nr_extents = nr_pages;
++ ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation, &reservation);
++ BUG_ON(ret != nr_pages);
++
++ bs.current_pages -= nr_pages;
++ totalram_pages = bs.current_pages;
++
++ balloon_unlock(flags);
++
++ return need_sleep;
++}
++
++/*
++ * We avoid multiple worker processes conflicting via the balloon mutex.
++ * We may of course race updates of the target counts (which are protected
++ * by the balloon lock), or with changes to the Xen hard limit, but we will
++ * recover from these in time.
++ */
++static void balloon_process(void *unused)
++{
++ int need_sleep = 0;
++ long credit;
++
++ mutex_lock(&balloon_mutex);
++
++ do {
++ credit = current_target() - bs.current_pages;
++ if (credit > 0)
++ need_sleep = (increase_reservation(credit) != 0);
++ if (credit < 0)
++ need_sleep = (decrease_reservation(-credit) != 0);
++
++#ifndef CONFIG_PREEMPT
++ if (need_resched())
++ schedule();
++#endif
++ } while ((credit != 0) && !need_sleep);
++
++ /* Schedule more work if there is some still to be done. */
++ if (current_target() != bs.current_pages)
++ mod_timer(&balloon_timer, jiffies + HZ);
++
++ mutex_unlock(&balloon_mutex);
++}
++
++/* Resets the Xen limit, sets new target, and kicks off processing. */
++void balloon_set_new_target(unsigned long target)
++{
++ /* No need for lock. Not read-modify-write updates. */
++ bs.hard_limit = ~0UL;
++ bs.target_pages = max(target, minimum_target());
++ schedule_work(&balloon_worker);
++}
++
++static struct xenbus_watch target_watch =
++{
++ .node = "memory/target"
++};
++
++/* React to a change in the target key */
++static void watch_target(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ unsigned long long new_target;
++ int err;
++
++ err = xenbus_scanf(XBT_NIL, "memory", "target", "%llu", &new_target);
++ if (err != 1) {
++ /* This is ok (for domain0 at least) - so just return */
++ return;
++ }
++
++ /* The given memory/target value is in KiB, so it needs converting to
++ * pages. PAGE_SHIFT converts bytes to pages, hence PAGE_SHIFT - 10.
++ */
++ balloon_set_new_target(new_target >> (PAGE_SHIFT - 10));
++}
++
++static int balloon_init_watcher(struct notifier_block *notifier,
++ unsigned long event,
++ void *data)
++{
++ int err;
++
++ err = register_xenbus_watch(&target_watch);
++ if (err)
++ printk(KERN_ERR "Failed to set balloon watcher\n");
++
++ return NOTIFY_DONE;
++}
++
++#ifdef CONFIG_PROC_FS
++static int balloon_write(struct file *file, const char __user *buffer,
++ unsigned long count, void *data)
++{
++ char memstring[64], *endchar;
++ unsigned long long target_bytes;
++
++ if (!capable(CAP_SYS_ADMIN))
++ return -EPERM;
++
++ if (count <= 1)
++ return -EBADMSG; /* runt */
++ if (count > sizeof(memstring))
++ return -EFBIG; /* too long */
++
++ if (copy_from_user(memstring, buffer, count))
++ return -EFAULT;
++ memstring[sizeof(memstring)-1] = '\0';
++
++ target_bytes = memparse(memstring, &endchar);
++ balloon_set_new_target(target_bytes >> PAGE_SHIFT);
++
++ return count;
++}
++
++static int balloon_read(char *page, char **start, off_t off,
++ int count, int *eof, void *data)
++{
++ int len;
++
++ len = sprintf(
++ page,
++ "Current allocation: %8lu kB\n"
++ "Requested target: %8lu kB\n"
++ "Low-mem balloon: %8lu kB\n"
++ "High-mem balloon: %8lu kB\n"
++ "Driver pages: %8lu kB\n"
++ "Xen hard limit: ",
++ PAGES2KB(bs.current_pages), PAGES2KB(bs.target_pages),
++ PAGES2KB(bs.balloon_low), PAGES2KB(bs.balloon_high),
++ PAGES2KB(bs.driver_pages));
++
++ if (bs.hard_limit != ~0UL)
++ len += sprintf(page + len, "%8lu kB\n",
++ PAGES2KB(bs.hard_limit));
++ else
++ len += sprintf(page + len, " ??? kB\n");
++
++ *eof = 1;
++ return len;
++}
++#endif
++
++static struct notifier_block xenstore_notifier;
++
++static int __init balloon_init(void)
++{
++#if defined(CONFIG_X86) && defined(CONFIG_XEN)
++ unsigned long pfn;
++ struct page *page;
++#endif
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ IPRINTK("Initialising balloon driver.\n");
++
++#ifdef CONFIG_XEN
++ bs.current_pages = min(xen_start_info->nr_pages, max_pfn);
++ totalram_pages = bs.current_pages;
++#else
++ bs.current_pages = totalram_pages;
++#endif
++ bs.target_pages = bs.current_pages;
++ bs.balloon_low = 0;
++ bs.balloon_high = 0;
++ bs.driver_pages = 0UL;
++ bs.hard_limit = ~0UL;
++
++ init_timer(&balloon_timer);
++ balloon_timer.data = 0;
++ balloon_timer.function = balloon_alarm;
++
++#ifdef CONFIG_PROC_FS
++ if ((balloon_pde = create_xen_proc_entry("balloon", 0644)) == NULL) {
++ WPRINTK("Unable to create /proc/xen/balloon.\n");
++ return -1;
++ }
++
++ balloon_pde->read_proc = balloon_read;
++ balloon_pde->write_proc = balloon_write;
++#endif
++ balloon_sysfs_init();
++
++#if defined(CONFIG_X86) && defined(CONFIG_XEN)
++ /* Initialise the balloon with excess memory space. */
++ for (pfn = xen_start_info->nr_pages; pfn < max_pfn; pfn++) {
++ page = pfn_to_page(pfn);
++ if (!PageReserved(page))
++ balloon_append(page);
++ }
++#endif
++
++ target_watch.callback = watch_target;
++ xenstore_notifier.notifier_call = balloon_init_watcher;
++
++ register_xenstore_notifier(&xenstore_notifier);
++
++ return 0;
++}
++
++subsys_initcall(balloon_init);
++
++static void __exit balloon_exit(void)
++{
++ /* XXX - release balloon here */
++ return;
++}
++
++module_exit(balloon_exit);
++
++void balloon_update_driver_allowance(long delta)
++{
++ unsigned long flags;
++
++ balloon_lock(flags);
++ bs.driver_pages += delta;
++ balloon_unlock(flags);
++}
++
++#ifdef CONFIG_XEN
++static int dealloc_pte_fn(
++ pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
++{
++ unsigned long mfn = pte_mfn(*pte);
++ int ret;
++ struct xen_memory_reservation reservation = {
++ .nr_extents = 1,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ };
++ set_xen_guest_handle(reservation.extent_start, &mfn);
++ set_pte_at(&init_mm, addr, pte, __pte_ma(0));
++ set_phys_to_machine(__pa(addr) >> PAGE_SHIFT, INVALID_P2M_ENTRY);
++ ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation, &reservation);
++ BUG_ON(ret != 1);
++ return 0;
++}
++#endif
++
++struct page **alloc_empty_pages_and_pagevec(int nr_pages)
++{
++ unsigned long flags;
++ void *v;
++ struct page *page, **pagevec;
++ int i, ret;
++
++ pagevec = kmalloc(sizeof(page) * nr_pages, GFP_KERNEL);
++ if (pagevec == NULL)
++ return NULL;
++
++ for (i = 0; i < nr_pages; i++) {
++ page = pagevec[i] = alloc_page(GFP_KERNEL|__GFP_COLD);
++ if (page == NULL)
++ goto err;
++
++ v = page_address(page);
++ scrub_pages(v, 1);
++
++ balloon_lock(flags);
++
++ if (xen_feature(XENFEAT_auto_translated_physmap)) {
++ unsigned long gmfn = page_to_pfn(page);
++ struct xen_memory_reservation reservation = {
++ .nr_extents = 1,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ };
++ set_xen_guest_handle(reservation.extent_start, &gmfn);
++ ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &reservation);
++ if (ret == 1)
++ ret = 0; /* success */
++ } else {
++#ifdef CONFIG_XEN
++ ret = apply_to_page_range(&init_mm, (unsigned long)v,
++ PAGE_SIZE, dealloc_pte_fn,
++ NULL);
++#else
++ /* Cannot handle non-auto translate mode. */
++ ret = 1;
++#endif
++ }
++
++ if (ret != 0) {
++ balloon_unlock(flags);
++ balloon_free_page(page);
++ goto err;
++ }
++
++ totalram_pages = --bs.current_pages;
++
++ balloon_unlock(flags);
++ }
++
++ out:
++ schedule_work(&balloon_worker);
++#ifdef CONFIG_XEN
++ flush_tlb_all();
++#endif
++ return pagevec;
++
++ err:
++ balloon_lock(flags);
++ while (--i >= 0)
++ balloon_append(pagevec[i]);
++ balloon_unlock(flags);
++ kfree(pagevec);
++ pagevec = NULL;
++ goto out;
++}
++
++void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages)
++{
++ unsigned long flags;
++ int i;
++
++ if (pagevec == NULL)
++ return;
++
++ balloon_lock(flags);
++ for (i = 0; i < nr_pages; i++) {
++ BUG_ON(page_count(pagevec[i]) != 1);
++ balloon_append(pagevec[i]);
++ }
++ balloon_unlock(flags);
++
++ kfree(pagevec);
++
++ schedule_work(&balloon_worker);
++}
++
++void balloon_release_driver_page(struct page *page)
++{
++ unsigned long flags;
++
++ balloon_lock(flags);
++ balloon_append(page);
++ bs.driver_pages--;
++ balloon_unlock(flags);
++
++ schedule_work(&balloon_worker);
++}
++
++EXPORT_SYMBOL_GPL(balloon_update_driver_allowance);
++EXPORT_SYMBOL_GPL(alloc_empty_pages_and_pagevec);
++EXPORT_SYMBOL_GPL(free_empty_pages_and_pagevec);
++EXPORT_SYMBOL_GPL(balloon_release_driver_page);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/balloon/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/balloon/common.h 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,58 @@
++/******************************************************************************
++ * balloon/common.h
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_BALLOON_COMMON_H__
++#define __XEN_BALLOON_COMMON_H__
++
++#define PAGES2KB(_p) ((_p)<<(PAGE_SHIFT-10))
++
++struct balloon_stats {
++ /* We aim for 'current allocation' == 'target allocation'. */
++ unsigned long current_pages;
++ unsigned long target_pages;
++ /* We may hit the hard limit in Xen. If we do then we remember it. */
++ unsigned long hard_limit;
++ /*
++ * Drivers may alter the memory reservation independently, but they
++ * must inform the balloon driver so we avoid hitting the hard limit.
++ */
++ unsigned long driver_pages;
++ /* Number of pages in high- and low-memory balloons. */
++ unsigned long balloon_low;
++ unsigned long balloon_high;
++};
++
++extern struct balloon_stats balloon_stats;
++#define bs balloon_stats
++
++int balloon_sysfs_init(void);
++void balloon_sysfs_exit(void);
++
++void balloon_set_new_target(unsigned long target);
++
++#endif /* __XEN_BALLOON_COMMON_H__ */
+Index: head-2008-11-25/drivers/xen/balloon/sysfs.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/balloon/sysfs.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,170 @@
++/******************************************************************************
++ * balloon/sysfs.c
++ *
++ * Xen balloon driver - sysfs interfaces.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/capability.h>
++#include <linux/errno.h>
++#include <linux/stat.h>
++#include <linux/string.h>
++#include <linux/sysdev.h>
++#include "common.h"
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++#define BALLOON_CLASS_NAME "xen_memory"
++
++#define BALLOON_SHOW(name, format, args...) \
++ static ssize_t show_##name(struct sys_device *dev, \
++ char *buf) \
++ { \
++ return sprintf(buf, format, ##args); \
++ } \
++ static SYSDEV_ATTR(name, S_IRUGO, show_##name, NULL)
++
++BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(bs.current_pages));
++BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(bs.balloon_low));
++BALLOON_SHOW(high_kb, "%lu\n", PAGES2KB(bs.balloon_high));
++BALLOON_SHOW(hard_limit_kb,
++ (bs.hard_limit!=~0UL) ? "%lu\n" : "???\n",
++ (bs.hard_limit!=~0UL) ? PAGES2KB(bs.hard_limit) : 0);
++BALLOON_SHOW(driver_kb, "%lu\n", PAGES2KB(bs.driver_pages));
++
++static ssize_t show_target_kb(struct sys_device *dev, char *buf)
++{
++ return sprintf(buf, "%lu\n", PAGES2KB(bs.target_pages));
++}
++
++static ssize_t store_target_kb(struct sys_device *dev,
++ const char *buf,
++ size_t count)
++{
++ char memstring[64], *endchar;
++ unsigned long long target_bytes;
++
++ if (!capable(CAP_SYS_ADMIN))
++ return -EPERM;
++
++ if (count <= 1)
++ return -EBADMSG; /* runt */
++ if (count > sizeof(memstring))
++ return -EFBIG; /* too long */
++ strcpy(memstring, buf);
++
++ target_bytes = memparse(memstring, &endchar);
++ balloon_set_new_target(target_bytes >> PAGE_SHIFT);
++
++ return count;
++}
++
++static SYSDEV_ATTR(target_kb, S_IRUGO | S_IWUSR,
++ show_target_kb, store_target_kb);
++
++static struct sysdev_attribute *balloon_attrs[] = {
++ &attr_target_kb,
++};
++
++static struct attribute *balloon_info_attrs[] = {
++ &attr_current_kb.attr,
++ &attr_low_kb.attr,
++ &attr_high_kb.attr,
++ &attr_hard_limit_kb.attr,
++ &attr_driver_kb.attr,
++ NULL
++};
++
++static struct attribute_group balloon_info_group = {
++ .name = "info",
++ .attrs = balloon_info_attrs,
++};
++
++static struct sysdev_class balloon_sysdev_class = {
++ set_kset_name(BALLOON_CLASS_NAME),
++};
++
++static struct sys_device balloon_sysdev;
++
++static int register_balloon(struct sys_device *sysdev)
++{
++ int i, error;
++
++ error = sysdev_class_register(&balloon_sysdev_class);
++ if (error)
++ return error;
++
++ sysdev->id = 0;
++ sysdev->cls = &balloon_sysdev_class;
++
++ error = sysdev_register(sysdev);
++ if (error) {
++ sysdev_class_unregister(&balloon_sysdev_class);
++ return error;
++ }
++
++ for (i = 0; i < ARRAY_SIZE(balloon_attrs); i++) {
++ error = sysdev_create_file(sysdev, balloon_attrs[i]);
++ if (error)
++ goto fail;
++ }
++
++ error = sysfs_create_group(&sysdev->kobj, &balloon_info_group);
++ if (error)
++ goto fail;
++
++ return 0;
++
++ fail:
++ while (--i >= 0)
++ sysdev_remove_file(sysdev, balloon_attrs[i]);
++ sysdev_unregister(sysdev);
++ sysdev_class_unregister(&balloon_sysdev_class);
++ return error;
++}
++
++static void unregister_balloon(struct sys_device *sysdev)
++{
++ int i;
++
++ sysfs_remove_group(&sysdev->kobj, &balloon_info_group);
++ for (i = 0; i < ARRAY_SIZE(balloon_attrs); i++)
++ sysdev_remove_file(sysdev, balloon_attrs[i]);
++ sysdev_unregister(sysdev);
++ sysdev_class_unregister(&balloon_sysdev_class);
++}
++
++int balloon_sysfs_init(void)
++{
++ return register_balloon(&balloon_sysdev);
++}
++
++void balloon_sysfs_exit(void)
++{
++ unregister_balloon(&balloon_sysdev);
++}
+Index: head-2008-11-25/drivers/xen/blkback/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkback/Makefile 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,3 @@
++obj-$(CONFIG_XEN_BLKDEV_BACKEND) := blkbk.o
++
++blkbk-y := blkback.o xenbus.o interface.o vbd.o
+Index: head-2008-11-25/drivers/xen/blkback/blkback.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkback/blkback.c 2008-11-10 11:44:21.000000000 +0100
+@@ -0,0 +1,656 @@
++/******************************************************************************
++ * arch/xen/drivers/blkif/backend/main.c
++ *
++ * Back-end of the driver for virtual block devices. This portion of the
++ * driver exports a 'unified' block-device interface that can be accessed
++ * by any operating system that implements a compatible front end. A
++ * reference front-end implementation can be found in:
++ * arch/xen/drivers/blkif/frontend
++ *
++ * Copyright (c) 2003-2004, Keir Fraser & Steve Hand
++ * Copyright (c) 2005, Christopher Clark
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/spinlock.h>
++#include <linux/kthread.h>
++#include <linux/list.h>
++#include <linux/delay.h>
++#include <xen/balloon.h>
++#include <asm/hypervisor.h>
++#include "common.h"
++
++/*
++ * These are rather arbitrary. They are fairly large because adjacent requests
++ * pulled from a communication ring are quite likely to end up being part of
++ * the same scatter/gather request at the disc.
++ *
++ * ** TRY INCREASING 'blkif_reqs' IF WRITE SPEEDS SEEM TOO LOW **
++ *
++ * This will increase the chances of being able to write whole tracks.
++ * 64 should be enough to keep us competitive with Linux.
++ */
++static int blkif_reqs = 64;
++module_param_named(reqs, blkif_reqs, int, 0);
++MODULE_PARM_DESC(reqs, "Number of blkback requests to allocate");
++
++/* Run-time switchable: /sys/module/blkback/parameters/ */
++static unsigned int log_stats = 0;
++static unsigned int debug_lvl = 0;
++module_param(log_stats, int, 0644);
++module_param(debug_lvl, int, 0644);
++
++/*
++ * Each outstanding request that we've passed to the lower device layers has a
++ * 'pending_req' allocated to it. Each buffer_head that completes decrements
++ * the pendcnt towards zero. When it hits zero, the specified domain has a
++ * response queued for it, with the saved 'id' passed back.
++ */
++typedef struct {
++ blkif_t *blkif;
++ u64 id;
++ int nr_pages;
++ atomic_t pendcnt;
++ unsigned short operation;
++ int status;
++ struct list_head free_list;
++} pending_req_t;
++
++static pending_req_t *pending_reqs;
++static struct list_head pending_free;
++static DEFINE_SPINLOCK(pending_free_lock);
++static DECLARE_WAIT_QUEUE_HEAD(pending_free_wq);
++
++#define BLKBACK_INVALID_HANDLE (~0)
++
++static struct page **pending_pages;
++static grant_handle_t *pending_grant_handles;
++
++static inline int vaddr_pagenr(pending_req_t *req, int seg)
++{
++ return (req - pending_reqs) * BLKIF_MAX_SEGMENTS_PER_REQUEST + seg;
++}
++
++static inline unsigned long vaddr(pending_req_t *req, int seg)
++{
++ unsigned long pfn = page_to_pfn(pending_pages[vaddr_pagenr(req, seg)]);
++ return (unsigned long)pfn_to_kaddr(pfn);
++}
++
++#define pending_handle(_req, _seg) \
++ (pending_grant_handles[vaddr_pagenr(_req, _seg)])
++
++
++static int do_block_io_op(blkif_t *blkif);
++static void dispatch_rw_block_io(blkif_t *blkif,
++ blkif_request_t *req,
++ pending_req_t *pending_req);
++static void make_response(blkif_t *blkif, u64 id,
++ unsigned short op, int st);
++
++/******************************************************************
++ * misc small helpers
++ */
++static pending_req_t* alloc_req(void)
++{
++ pending_req_t *req = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&pending_free_lock, flags);
++ if (!list_empty(&pending_free)) {
++ req = list_entry(pending_free.next, pending_req_t, free_list);
++ list_del(&req->free_list);
++ }
++ spin_unlock_irqrestore(&pending_free_lock, flags);
++ return req;
++}
++
++static void free_req(pending_req_t *req)
++{
++ unsigned long flags;
++ int was_empty;
++
++ spin_lock_irqsave(&pending_free_lock, flags);
++ was_empty = list_empty(&pending_free);
++ list_add(&req->free_list, &pending_free);
++ spin_unlock_irqrestore(&pending_free_lock, flags);
++ if (was_empty)
++ wake_up(&pending_free_wq);
++}
++
++static void unplug_queue(blkif_t *blkif)
++{
++ if (blkif->plug == NULL)
++ return;
++ if (blkif->plug->unplug_fn)
++ blkif->plug->unplug_fn(blkif->plug);
++ blk_put_queue(blkif->plug);
++ blkif->plug = NULL;
++}
++
++static void plug_queue(blkif_t *blkif, struct block_device *bdev)
++{
++ request_queue_t *q = bdev_get_queue(bdev);
++
++ if (q == blkif->plug)
++ return;
++ unplug_queue(blkif);
++ blk_get_queue(q);
++ blkif->plug = q;
++}
++
++static void fast_flush_area(pending_req_t *req)
++{
++ struct gnttab_unmap_grant_ref unmap[BLKIF_MAX_SEGMENTS_PER_REQUEST];
++ unsigned int i, invcount = 0;
++ grant_handle_t handle;
++ int ret;
++
++ for (i = 0; i < req->nr_pages; i++) {
++ handle = pending_handle(req, i);
++ if (handle == BLKBACK_INVALID_HANDLE)
++ continue;
++ gnttab_set_unmap_op(&unmap[invcount], vaddr(req, i),
++ GNTMAP_host_map, handle);
++ pending_handle(req, i) = BLKBACK_INVALID_HANDLE;
++ invcount++;
++ }
++
++ ret = HYPERVISOR_grant_table_op(
++ GNTTABOP_unmap_grant_ref, unmap, invcount);
++ BUG_ON(ret);
++}
++
++/******************************************************************
++ * SCHEDULER FUNCTIONS
++ */
++
++static void print_stats(blkif_t *blkif)
++{
++ printk(KERN_DEBUG "%s: oo %3d | rd %4d | wr %4d | br %4d\n",
++ current->comm, blkif->st_oo_req,
++ blkif->st_rd_req, blkif->st_wr_req, blkif->st_br_req);
++ blkif->st_print = jiffies + msecs_to_jiffies(10 * 1000);
++ blkif->st_rd_req = 0;
++ blkif->st_wr_req = 0;
++ blkif->st_oo_req = 0;
++}
++
++int blkif_schedule(void *arg)
++{
++ blkif_t *blkif = arg;
++
++ blkif_get(blkif);
++
++ if (debug_lvl)
++ printk(KERN_DEBUG "%s: started\n", current->comm);
++
++ while (!kthread_should_stop()) {
++ if (try_to_freeze())
++ continue;
++
++ wait_event_interruptible(
++ blkif->wq,
++ blkif->waiting_reqs || kthread_should_stop());
++ wait_event_interruptible(
++ pending_free_wq,
++ !list_empty(&pending_free) || kthread_should_stop());
++
++ blkif->waiting_reqs = 0;
++ smp_mb(); /* clear flag *before* checking for work */
++
++ if (do_block_io_op(blkif))
++ blkif->waiting_reqs = 1;
++ unplug_queue(blkif);
++
++ if (log_stats && time_after(jiffies, blkif->st_print))
++ print_stats(blkif);
++ }
++
++ if (log_stats)
++ print_stats(blkif);
++ if (debug_lvl)
++ printk(KERN_DEBUG "%s: exiting\n", current->comm);
++
++ blkif->xenblkd = NULL;
++ blkif_put(blkif);
++
++ return 0;
++}
++
++/******************************************************************
++ * COMPLETION CALLBACK -- Called as bh->b_end_io()
++ */
++
++static void __end_block_io_op(pending_req_t *pending_req, int error)
++{
++ /* An error fails the entire request. */
++ if ((pending_req->operation == BLKIF_OP_WRITE_BARRIER) &&
++ (error == -EOPNOTSUPP)) {
++ DPRINTK("blkback: write barrier op failed, not supported\n");
++ blkback_barrier(XBT_NIL, pending_req->blkif->be, 0);
++ pending_req->status = BLKIF_RSP_EOPNOTSUPP;
++ } else if (error) {
++ DPRINTK("Buffer not up-to-date at end of operation, "
++ "error=%d\n", error);
++ pending_req->status = BLKIF_RSP_ERROR;
++ }
++
++ if (atomic_dec_and_test(&pending_req->pendcnt)) {
++ fast_flush_area(pending_req);
++ make_response(pending_req->blkif, pending_req->id,
++ pending_req->operation, pending_req->status);
++ blkif_put(pending_req->blkif);
++ free_req(pending_req);
++ }
++}
++
++static int end_block_io_op(struct bio *bio, unsigned int done, int error)
++{
++ if (bio->bi_size != 0)
++ return 1;
++ __end_block_io_op(bio->bi_private, error);
++ bio_put(bio);
++ return error;
++}
++
++
++/******************************************************************************
++ * NOTIFICATION FROM GUEST OS.
++ */
++
++static void blkif_notify_work(blkif_t *blkif)
++{
++ blkif->waiting_reqs = 1;
++ wake_up(&blkif->wq);
++}
++
++irqreturn_t blkif_be_int(int irq, void *dev_id, struct pt_regs *regs)
++{
++ blkif_notify_work(dev_id);
++ return IRQ_HANDLED;
++}
++
++
++
++/******************************************************************
++ * DOWNWARD CALLS -- These interface with the block-device layer proper.
++ */
++
++static int do_block_io_op(blkif_t *blkif)
++{
++ blkif_back_rings_t *blk_rings = &blkif->blk_rings;
++ blkif_request_t req;
++ pending_req_t *pending_req;
++ RING_IDX rc, rp;
++ int more_to_do = 0;
++
++ rc = blk_rings->common.req_cons;
++ rp = blk_rings->common.sring->req_prod;
++ rmb(); /* Ensure we see queued requests up to 'rp'. */
++
++ while (rc != rp) {
++
++ if (RING_REQUEST_CONS_OVERFLOW(&blk_rings->common, rc))
++ break;
++
++ pending_req = alloc_req();
++ if (NULL == pending_req) {
++ blkif->st_oo_req++;
++ more_to_do = 1;
++ break;
++ }
++
++ if (kthread_should_stop()) {
++ more_to_do = 1;
++ break;
++ }
++
++ switch (blkif->blk_protocol) {
++ case BLKIF_PROTOCOL_NATIVE:
++ memcpy(&req, RING_GET_REQUEST(&blk_rings->native, rc), sizeof(req));
++ break;
++ case BLKIF_PROTOCOL_X86_32:
++ blkif_get_x86_32_req(&req, RING_GET_REQUEST(&blk_rings->x86_32, rc));
++ break;
++ case BLKIF_PROTOCOL_X86_64:
++ blkif_get_x86_64_req(&req, RING_GET_REQUEST(&blk_rings->x86_64, rc));
++ break;
++ default:
++ BUG();
++ }
++ blk_rings->common.req_cons = ++rc; /* before make_response() */
++
++ /* Apply all sanity checks to /private copy/ of request. */
++ barrier();
++
++ switch (req.operation) {
++ case BLKIF_OP_READ:
++ blkif->st_rd_req++;
++ dispatch_rw_block_io(blkif, &req, pending_req);
++ break;
++ case BLKIF_OP_WRITE_BARRIER:
++ blkif->st_br_req++;
++ /* fall through */
++ case BLKIF_OP_WRITE:
++ blkif->st_wr_req++;
++ dispatch_rw_block_io(blkif, &req, pending_req);
++ break;
++ default:
++ /* A good sign something is wrong: sleep for a while to
++ * avoid excessive CPU consumption by a bad guest. */
++ msleep(1);
++ DPRINTK("error: unknown block io operation [%d]\n",
++ req.operation);
++ make_response(blkif, req.id, req.operation,
++ BLKIF_RSP_ERROR);
++ free_req(pending_req);
++ break;
++ }
++
++ /* Yield point for this unbounded loop. */
++ cond_resched();
++ }
++
++ return more_to_do;
++}
++
++static void dispatch_rw_block_io(blkif_t *blkif,
++ blkif_request_t *req,
++ pending_req_t *pending_req)
++{
++ extern void ll_rw_block(int rw, int nr, struct buffer_head * bhs[]);
++ struct gnttab_map_grant_ref map[BLKIF_MAX_SEGMENTS_PER_REQUEST];
++ struct phys_req preq;
++ struct {
++ unsigned long buf; unsigned int nsec;
++ } seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
++ unsigned int nseg;
++ struct bio *bio = NULL;
++ int ret, i;
++ int operation;
++
++ switch (req->operation) {
++ case BLKIF_OP_READ:
++ operation = READ;
++ break;
++ case BLKIF_OP_WRITE:
++ operation = WRITE;
++ break;
++ case BLKIF_OP_WRITE_BARRIER:
++ operation = WRITE_BARRIER;
++ break;
++ default:
++ operation = 0; /* make gcc happy */
++ BUG();
++ }
++
++ /* Check that number of segments is sane. */
++ nseg = req->nr_segments;
++ if (unlikely(nseg == 0 && operation != WRITE_BARRIER) ||
++ unlikely(nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST)) {
++ DPRINTK("Bad number of segments in request (%d)\n", nseg);
++ goto fail_response;
++ }
++
++ preq.dev = req->handle;
++ preq.sector_number = req->sector_number;
++ preq.nr_sects = 0;
++
++ pending_req->blkif = blkif;
++ pending_req->id = req->id;
++ pending_req->operation = req->operation;
++ pending_req->status = BLKIF_RSP_OKAY;
++ pending_req->nr_pages = nseg;
++
++ for (i = 0; i < nseg; i++) {
++ uint32_t flags;
++
++ seg[i].nsec = req->seg[i].last_sect -
++ req->seg[i].first_sect + 1;
++
++ if ((req->seg[i].last_sect >= (PAGE_SIZE >> 9)) ||
++ (req->seg[i].last_sect < req->seg[i].first_sect))
++ goto fail_response;
++ preq.nr_sects += seg[i].nsec;
++
++ flags = GNTMAP_host_map;
++ if (operation != READ)
++ flags |= GNTMAP_readonly;
++ gnttab_set_map_op(&map[i], vaddr(pending_req, i), flags,
++ req->seg[i].gref, blkif->domid);
++ }
++
++ ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map, nseg);
++ BUG_ON(ret);
++
++ for (i = 0; i < nseg; i++) {
++ if (unlikely(map[i].status != 0)) {
++ DPRINTK("invalid buffer -- could not remap it\n");
++ map[i].handle = BLKBACK_INVALID_HANDLE;
++ ret |= 1;
++ }
++
++ pending_handle(pending_req, i) = map[i].handle;
++
++ if (ret)
++ continue;
++
++ set_phys_to_machine(__pa(vaddr(
++ pending_req, i)) >> PAGE_SHIFT,
++ FOREIGN_FRAME(map[i].dev_bus_addr >> PAGE_SHIFT));
++ seg[i].buf = map[i].dev_bus_addr |
++ (req->seg[i].first_sect << 9);
++ }
++
++ if (ret)
++ goto fail_flush;
++
++ if (vbd_translate(&preq, blkif, operation) != 0) {
++ DPRINTK("access denied: %s of [%llu,%llu] on dev=%04x\n",
++ operation == READ ? "read" : "write",
++ preq.sector_number,
++ preq.sector_number + preq.nr_sects, preq.dev);
++ goto fail_flush;
++ }
++
++ plug_queue(blkif, preq.bdev);
++ atomic_set(&pending_req->pendcnt, 1);
++ blkif_get(blkif);
++
++ for (i = 0; i < nseg; i++) {
++ if (((int)preq.sector_number|(int)seg[i].nsec) &
++ ((bdev_hardsect_size(preq.bdev) >> 9) - 1)) {
++ DPRINTK("Misaligned I/O request from domain %d",
++ blkif->domid);
++ goto fail_put_bio;
++ }
++
++ while ((bio == NULL) ||
++ (bio_add_page(bio,
++ virt_to_page(vaddr(pending_req, i)),
++ seg[i].nsec << 9,
++ seg[i].buf & ~PAGE_MASK) == 0)) {
++ if (bio) {
++ atomic_inc(&pending_req->pendcnt);
++ submit_bio(operation, bio);
++ }
++
++ bio = bio_alloc(GFP_KERNEL, nseg-i);
++ if (unlikely(bio == NULL))
++ goto fail_put_bio;
++
++ bio->bi_bdev = preq.bdev;
++ bio->bi_private = pending_req;
++ bio->bi_end_io = end_block_io_op;
++ bio->bi_sector = preq.sector_number;
++ }
++
++ preq.sector_number += seg[i].nsec;
++ }
++
++ if (!bio) {
++ BUG_ON(operation != WRITE_BARRIER);
++ bio = bio_alloc(GFP_KERNEL, 0);
++ if (unlikely(bio == NULL))
++ goto fail_put_bio;
++
++ bio->bi_bdev = preq.bdev;
++ bio->bi_private = pending_req;
++ bio->bi_end_io = end_block_io_op;
++ bio->bi_sector = -1;
++ }
++
++ submit_bio(operation, bio);
++
++ if (operation == READ)
++ blkif->st_rd_sect += preq.nr_sects;
++ else if (operation == WRITE || operation == WRITE_BARRIER)
++ blkif->st_wr_sect += preq.nr_sects;
++
++ return;
++
++ fail_flush:
++ fast_flush_area(pending_req);
++ fail_response:
++ make_response(blkif, req->id, req->operation, BLKIF_RSP_ERROR);
++ free_req(pending_req);
++ msleep(1); /* back off a bit */
++ return;
++
++ fail_put_bio:
++ __end_block_io_op(pending_req, -EINVAL);
++ if (bio)
++ bio_put(bio);
++ unplug_queue(blkif);
++ msleep(1); /* back off a bit */
++ return;
++}
++
++
++
++/******************************************************************
++ * MISCELLANEOUS SETUP / TEARDOWN / DEBUGGING
++ */
++
++
++static void make_response(blkif_t *blkif, u64 id,
++ unsigned short op, int st)
++{
++ blkif_response_t resp;
++ unsigned long flags;
++ blkif_back_rings_t *blk_rings = &blkif->blk_rings;
++ int more_to_do = 0;
++ int notify;
++
++ resp.id = id;
++ resp.operation = op;
++ resp.status = st;
++
++ spin_lock_irqsave(&blkif->blk_ring_lock, flags);
++ /* Place on the response ring for the relevant domain. */
++ switch (blkif->blk_protocol) {
++ case BLKIF_PROTOCOL_NATIVE:
++ memcpy(RING_GET_RESPONSE(&blk_rings->native, blk_rings->native.rsp_prod_pvt),
++ &resp, sizeof(resp));
++ break;
++ case BLKIF_PROTOCOL_X86_32:
++ memcpy(RING_GET_RESPONSE(&blk_rings->x86_32, blk_rings->x86_32.rsp_prod_pvt),
++ &resp, sizeof(resp));
++ break;
++ case BLKIF_PROTOCOL_X86_64:
++ memcpy(RING_GET_RESPONSE(&blk_rings->x86_64, blk_rings->x86_64.rsp_prod_pvt),
++ &resp, sizeof(resp));
++ break;
++ default:
++ BUG();
++ }
++ blk_rings->common.rsp_prod_pvt++;
++ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&blk_rings->common, notify);
++ if (blk_rings->common.rsp_prod_pvt == blk_rings->common.req_cons) {
++ /*
++ * Tail check for pending requests. Allows frontend to avoid
++ * notifications if requests are already in flight (lower
++ * overheads and promotes batching).
++ */
++ RING_FINAL_CHECK_FOR_REQUESTS(&blk_rings->common, more_to_do);
++
++ } else if (RING_HAS_UNCONSUMED_REQUESTS(&blk_rings->common)) {
++ more_to_do = 1;
++ }
++
++ spin_unlock_irqrestore(&blkif->blk_ring_lock, flags);
++
++ if (more_to_do)
++ blkif_notify_work(blkif);
++ if (notify)
++ notify_remote_via_irq(blkif->irq);
++}
++
++static int __init blkif_init(void)
++{
++ int i, mmap_pages;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ mmap_pages = blkif_reqs * BLKIF_MAX_SEGMENTS_PER_REQUEST;
++
++ pending_reqs = kmalloc(sizeof(pending_reqs[0]) *
++ blkif_reqs, GFP_KERNEL);
++ pending_grant_handles = kmalloc(sizeof(pending_grant_handles[0]) *
++ mmap_pages, GFP_KERNEL);
++ pending_pages = alloc_empty_pages_and_pagevec(mmap_pages);
++
++ if (!pending_reqs || !pending_grant_handles || !pending_pages)
++ goto out_of_memory;
++
++ for (i = 0; i < mmap_pages; i++)
++ pending_grant_handles[i] = BLKBACK_INVALID_HANDLE;
++
++ blkif_interface_init();
++
++ memset(pending_reqs, 0, sizeof(pending_reqs));
++ INIT_LIST_HEAD(&pending_free);
++
++ for (i = 0; i < blkif_reqs; i++)
++ list_add_tail(&pending_reqs[i].free_list, &pending_free);
++
++ blkif_xenbus_init();
++
++ return 0;
++
++ out_of_memory:
++ kfree(pending_reqs);
++ kfree(pending_grant_handles);
++ free_empty_pages_and_pagevec(pending_pages, mmap_pages);
++ printk("%s: out of memory\n", __FUNCTION__);
++ return -ENOMEM;
++}
++
++module_init(blkif_init);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/blkback/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkback/common.h 2008-05-08 14:02:04.000000000 +0200
+@@ -0,0 +1,139 @@
++/*
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __BLKIF__BACKEND__COMMON_H__
++#define __BLKIF__BACKEND__COMMON_H__
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/interrupt.h>
++#include <linux/slab.h>
++#include <linux/blkdev.h>
++#include <linux/vmalloc.h>
++#include <linux/wait.h>
++#include <asm/io.h>
++#include <asm/setup.h>
++#include <asm/pgalloc.h>
++#include <xen/evtchn.h>
++#include <asm/hypervisor.h>
++#include <xen/blkif.h>
++#include <xen/gnttab.h>
++#include <xen/driver_util.h>
++#include <xen/xenbus.h>
++
++#define DPRINTK(_f, _a...) \
++ pr_debug("(file=%s, line=%d) " _f, \
++ __FILE__ , __LINE__ , ## _a )
++
++struct vbd {
++ blkif_vdev_t handle; /* what the domain refers to this vbd as */
++ unsigned char readonly; /* Non-zero -> read-only */
++ unsigned char type; /* VDISK_xxx */
++ u32 pdevice; /* phys device that this vbd maps to */
++ struct block_device *bdev;
++};
++
++struct backend_info;
++
++typedef struct blkif_st {
++ /* Unique identifier for this interface. */
++ domid_t domid;
++ unsigned int handle;
++ /* Physical parameters of the comms window. */
++ unsigned int irq;
++ /* Comms information. */
++ enum blkif_protocol blk_protocol;
++ blkif_back_rings_t blk_rings;
++ struct vm_struct *blk_ring_area;
++ /* The VBD attached to this interface. */
++ struct vbd vbd;
++ /* Back pointer to the backend_info. */
++ struct backend_info *be;
++ /* Private fields. */
++ spinlock_t blk_ring_lock;
++ atomic_t refcnt;
++
++ wait_queue_head_t wq;
++ struct task_struct *xenblkd;
++ unsigned int waiting_reqs;
++ request_queue_t *plug;
++
++ /* statistics */
++ unsigned long st_print;
++ int st_rd_req;
++ int st_wr_req;
++ int st_oo_req;
++ int st_br_req;
++ int st_rd_sect;
++ int st_wr_sect;
++
++ wait_queue_head_t waiting_to_free;
++
++ grant_handle_t shmem_handle;
++ grant_ref_t shmem_ref;
++} blkif_t;
++
++blkif_t *blkif_alloc(domid_t domid);
++void blkif_disconnect(blkif_t *blkif);
++void blkif_free(blkif_t *blkif);
++int blkif_map(blkif_t *blkif, unsigned long shared_page, unsigned int evtchn);
++
++#define blkif_get(_b) (atomic_inc(&(_b)->refcnt))
++#define blkif_put(_b) \
++ do { \
++ if (atomic_dec_and_test(&(_b)->refcnt)) \
++ wake_up(&(_b)->waiting_to_free);\
++ } while (0)
++
++/* Create a vbd. */
++int vbd_create(blkif_t *blkif, blkif_vdev_t vdevice, unsigned major,
++ unsigned minor, int readonly, int cdrom);
++void vbd_free(struct vbd *vbd);
++
++unsigned long long vbd_size(struct vbd *vbd);
++unsigned int vbd_info(struct vbd *vbd);
++unsigned long vbd_secsize(struct vbd *vbd);
++
++struct phys_req {
++ unsigned short dev;
++ unsigned short nr_sects;
++ struct block_device *bdev;
++ blkif_sector_t sector_number;
++};
++
++int vbd_translate(struct phys_req *req, blkif_t *blkif, int operation);
++
++void blkif_interface_init(void);
++
++void blkif_xenbus_init(void);
++
++irqreturn_t blkif_be_int(int irq, void *dev_id, struct pt_regs *regs);
++int blkif_schedule(void *arg);
++
++int blkback_barrier(struct xenbus_transaction xbt,
++ struct backend_info *be, int state);
++
++#endif /* __BLKIF__BACKEND__COMMON_H__ */
+Index: head-2008-11-25/drivers/xen/blkback/interface.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkback/interface.c 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,181 @@
++/******************************************************************************
++ * arch/xen/drivers/blkif/backend/interface.c
++ *
++ * Block-device interface management.
++ *
++ * Copyright (c) 2004, Keir Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include "common.h"
++#include <xen/evtchn.h>
++#include <linux/kthread.h>
++
++static kmem_cache_t *blkif_cachep;
++
++blkif_t *blkif_alloc(domid_t domid)
++{
++ blkif_t *blkif;
++
++ blkif = kmem_cache_alloc(blkif_cachep, GFP_KERNEL);
++ if (!blkif)
++ return ERR_PTR(-ENOMEM);
++
++ memset(blkif, 0, sizeof(*blkif));
++ blkif->domid = domid;
++ spin_lock_init(&blkif->blk_ring_lock);
++ atomic_set(&blkif->refcnt, 1);
++ init_waitqueue_head(&blkif->wq);
++ blkif->st_print = jiffies;
++ init_waitqueue_head(&blkif->waiting_to_free);
++
++ return blkif;
++}
++
++static int map_frontend_page(blkif_t *blkif, unsigned long shared_page)
++{
++ struct gnttab_map_grant_ref op;
++
++ gnttab_set_map_op(&op, (unsigned long)blkif->blk_ring_area->addr,
++ GNTMAP_host_map, shared_page, blkif->domid);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status) {
++ DPRINTK(" Grant table operation failure !\n");
++ return op.status;
++ }
++
++ blkif->shmem_ref = shared_page;
++ blkif->shmem_handle = op.handle;
++
++ return 0;
++}
++
++static void unmap_frontend_page(blkif_t *blkif)
++{
++ struct gnttab_unmap_grant_ref op;
++
++ gnttab_set_unmap_op(&op, (unsigned long)blkif->blk_ring_area->addr,
++ GNTMAP_host_map, blkif->shmem_handle);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++}
++
++int blkif_map(blkif_t *blkif, unsigned long shared_page, unsigned int evtchn)
++{
++ int err;
++
++ /* Already connected through? */
++ if (blkif->irq)
++ return 0;
++
++ if ( (blkif->blk_ring_area = alloc_vm_area(PAGE_SIZE)) == NULL )
++ return -ENOMEM;
++
++ err = map_frontend_page(blkif, shared_page);
++ if (err) {
++ free_vm_area(blkif->blk_ring_area);
++ return err;
++ }
++
++ switch (blkif->blk_protocol) {
++ case BLKIF_PROTOCOL_NATIVE:
++ {
++ blkif_sring_t *sring;
++ sring = (blkif_sring_t *)blkif->blk_ring_area->addr;
++ BACK_RING_INIT(&blkif->blk_rings.native, sring, PAGE_SIZE);
++ break;
++ }
++ case BLKIF_PROTOCOL_X86_32:
++ {
++ blkif_x86_32_sring_t *sring_x86_32;
++ sring_x86_32 = (blkif_x86_32_sring_t *)blkif->blk_ring_area->addr;
++ BACK_RING_INIT(&blkif->blk_rings.x86_32, sring_x86_32, PAGE_SIZE);
++ break;
++ }
++ case BLKIF_PROTOCOL_X86_64:
++ {
++ blkif_x86_64_sring_t *sring_x86_64;
++ sring_x86_64 = (blkif_x86_64_sring_t *)blkif->blk_ring_area->addr;
++ BACK_RING_INIT(&blkif->blk_rings.x86_64, sring_x86_64, PAGE_SIZE);
++ break;
++ }
++ default:
++ BUG();
++ }
++
++ err = bind_interdomain_evtchn_to_irqhandler(
++ blkif->domid, evtchn, blkif_be_int, 0, "blkif-backend", blkif);
++ if (err < 0)
++ {
++ unmap_frontend_page(blkif);
++ free_vm_area(blkif->blk_ring_area);
++ blkif->blk_rings.common.sring = NULL;
++ return err;
++ }
++ blkif->irq = err;
++
++ return 0;
++}
++
++void blkif_disconnect(blkif_t *blkif)
++{
++ if (blkif->xenblkd) {
++ kthread_stop(blkif->xenblkd);
++ blkif->xenblkd = NULL;
++ }
++
++ atomic_dec(&blkif->refcnt);
++ wait_event(blkif->waiting_to_free, atomic_read(&blkif->refcnt) == 0);
++ atomic_inc(&blkif->refcnt);
++
++ if (blkif->irq) {
++ unbind_from_irqhandler(blkif->irq, blkif);
++ blkif->irq = 0;
++ }
++
++ if (blkif->blk_rings.common.sring) {
++ unmap_frontend_page(blkif);
++ free_vm_area(blkif->blk_ring_area);
++ blkif->blk_rings.common.sring = NULL;
++ }
++}
++
++void blkif_free(blkif_t *blkif)
++{
++ if (!atomic_dec_and_test(&blkif->refcnt))
++ BUG();
++ kmem_cache_free(blkif_cachep, blkif);
++}
++
++void __init blkif_interface_init(void)
++{
++ blkif_cachep = kmem_cache_create("blkif_cache", sizeof(blkif_t),
++ 0, 0, NULL, NULL);
++}
+Index: head-2008-11-25/drivers/xen/blkback/vbd.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkback/vbd.c 2008-05-08 14:02:04.000000000 +0200
+@@ -0,0 +1,118 @@
++/******************************************************************************
++ * blkback/vbd.c
++ *
++ * Routines for managing virtual block devices (VBDs).
++ *
++ * Copyright (c) 2003-2005, Keir Fraser & Steve Hand
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include "common.h"
++
++#define vbd_sz(_v) ((_v)->bdev->bd_part ? \
++ (_v)->bdev->bd_part->nr_sects : (_v)->bdev->bd_disk->capacity)
++
++unsigned long long vbd_size(struct vbd *vbd)
++{
++ return vbd_sz(vbd);
++}
++
++unsigned int vbd_info(struct vbd *vbd)
++{
++ return vbd->type | (vbd->readonly?VDISK_READONLY:0);
++}
++
++unsigned long vbd_secsize(struct vbd *vbd)
++{
++ return bdev_hardsect_size(vbd->bdev);
++}
++
++int vbd_create(blkif_t *blkif, blkif_vdev_t handle, unsigned major,
++ unsigned minor, int readonly, int cdrom)
++{
++ struct vbd *vbd;
++ struct block_device *bdev;
++
++ vbd = &blkif->vbd;
++ vbd->handle = handle;
++ vbd->readonly = readonly;
++ vbd->type = 0;
++
++ vbd->pdevice = MKDEV(major, minor);
++
++ bdev = open_by_devnum(vbd->pdevice,
++ vbd->readonly ? FMODE_READ : FMODE_WRITE);
++
++ if (IS_ERR(bdev)) {
++ DPRINTK("vbd_creat: device %08x could not be opened.\n",
++ vbd->pdevice);
++ return -ENOENT;
++ }
++
++ vbd->bdev = bdev;
++
++ if (vbd->bdev->bd_disk == NULL) {
++ DPRINTK("vbd_creat: device %08x doesn't exist.\n",
++ vbd->pdevice);
++ vbd_free(vbd);
++ return -ENOENT;
++ }
++
++ if (vbd->bdev->bd_disk->flags & GENHD_FL_CD || cdrom)
++ vbd->type |= VDISK_CDROM;
++ if (vbd->bdev->bd_disk->flags & GENHD_FL_REMOVABLE)
++ vbd->type |= VDISK_REMOVABLE;
++
++ DPRINTK("Successful creation of handle=%04x (dom=%u)\n",
++ handle, blkif->domid);
++ return 0;
++}
++
++void vbd_free(struct vbd *vbd)
++{
++ if (vbd->bdev)
++ blkdev_put(vbd->bdev);
++ vbd->bdev = NULL;
++}
++
++int vbd_translate(struct phys_req *req, blkif_t *blkif, int operation)
++{
++ struct vbd *vbd = &blkif->vbd;
++ int rc = -EACCES;
++
++ if ((operation != READ) && vbd->readonly)
++ goto out;
++
++ if (unlikely((req->sector_number + req->nr_sects) > vbd_sz(vbd)))
++ goto out;
++
++ req->dev = vbd->pdevice;
++ req->bdev = vbd->bdev;
++ rc = 0;
++
++ out:
++ return rc;
++}
+Index: head-2008-11-25/drivers/xen/blkback/xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkback/xenbus.c 2008-05-08 14:02:04.000000000 +0200
+@@ -0,0 +1,541 @@
++/* Xenbus code for blkif backend
++ Copyright (C) 2005 Rusty Russell <rusty@rustcorp.com.au>
++ Copyright (C) 2005 XenSource Ltd
++
++ This program is free software; you can redistribute it and/or modify
++ it under the terms of the GNU General Public License as published by
++ the Free Software Foundation; either version 2 of the License, or
++ (at your option) any later version.
++
++ This program is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ GNU General Public License for more details.
++
++ You should have received a copy of the GNU General Public License
++ along with this program; if not, write to the Free Software
++ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++*/
++
++#include <stdarg.h>
++#include <linux/module.h>
++#include <linux/kthread.h>
++#include "common.h"
++
++#undef DPRINTK
++#define DPRINTK(fmt, args...) \
++ pr_debug("blkback/xenbus (%s:%d) " fmt ".\n", \
++ __FUNCTION__, __LINE__, ##args)
++
++struct backend_info
++{
++ struct xenbus_device *dev;
++ blkif_t *blkif;
++ struct xenbus_watch backend_watch;
++ unsigned major;
++ unsigned minor;
++ char *mode;
++};
++
++static void connect(struct backend_info *);
++static int connect_ring(struct backend_info *);
++static void backend_changed(struct xenbus_watch *, const char **,
++ unsigned int);
++
++static int blkback_name(blkif_t *blkif, char *buf)
++{
++ char *devpath, *devname;
++ struct xenbus_device *dev = blkif->be->dev;
++
++ devpath = xenbus_read(XBT_NIL, dev->nodename, "dev", NULL);
++ if (IS_ERR(devpath))
++ return PTR_ERR(devpath);
++
++ if ((devname = strstr(devpath, "/dev/")) != NULL)
++ devname += strlen("/dev/");
++ else
++ devname = devpath;
++
++ snprintf(buf, TASK_COMM_LEN, "blkback.%d.%s", blkif->domid, devname);
++ kfree(devpath);
++
++ return 0;
++}
++
++static void update_blkif_status(blkif_t *blkif)
++{
++ int err;
++ char name[TASK_COMM_LEN];
++
++ /* Not ready to connect? */
++ if (!blkif->irq || !blkif->vbd.bdev)
++ return;
++
++ /* Already connected? */
++ if (blkif->be->dev->state == XenbusStateConnected)
++ return;
++
++ /* Attempt to connect: exit if we fail to. */
++ connect(blkif->be);
++ if (blkif->be->dev->state != XenbusStateConnected)
++ return;
++
++ err = blkback_name(blkif, name);
++ if (err) {
++ xenbus_dev_error(blkif->be->dev, err, "get blkback dev name");
++ return;
++ }
++
++ blkif->xenblkd = kthread_run(blkif_schedule, blkif, name);
++ if (IS_ERR(blkif->xenblkd)) {
++ err = PTR_ERR(blkif->xenblkd);
++ blkif->xenblkd = NULL;
++ xenbus_dev_error(blkif->be->dev, err, "start xenblkd");
++ }
++}
++
++
++/****************************************************************
++ * sysfs interface for VBD I/O requests
++ */
++
++#define VBD_SHOW(name, format, args...) \
++ static ssize_t show_##name(struct device *_dev, \
++ struct device_attribute *attr, \
++ char *buf) \
++ { \
++ struct xenbus_device *dev = to_xenbus_device(_dev); \
++ struct backend_info *be = dev->dev.driver_data; \
++ \
++ return sprintf(buf, format, ##args); \
++ } \
++ static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
++
++VBD_SHOW(oo_req, "%d\n", be->blkif->st_oo_req);
++VBD_SHOW(rd_req, "%d\n", be->blkif->st_rd_req);
++VBD_SHOW(wr_req, "%d\n", be->blkif->st_wr_req);
++VBD_SHOW(br_req, "%d\n", be->blkif->st_br_req);
++VBD_SHOW(rd_sect, "%d\n", be->blkif->st_rd_sect);
++VBD_SHOW(wr_sect, "%d\n", be->blkif->st_wr_sect);
++
++static struct attribute *vbdstat_attrs[] = {
++ &dev_attr_oo_req.attr,
++ &dev_attr_rd_req.attr,
++ &dev_attr_wr_req.attr,
++ &dev_attr_br_req.attr,
++ &dev_attr_rd_sect.attr,
++ &dev_attr_wr_sect.attr,
++ NULL
++};
++
++static struct attribute_group vbdstat_group = {
++ .name = "statistics",
++ .attrs = vbdstat_attrs,
++};
++
++VBD_SHOW(physical_device, "%x:%x\n", be->major, be->minor);
++VBD_SHOW(mode, "%s\n", be->mode);
++
++int xenvbd_sysfs_addif(struct xenbus_device *dev)
++{
++ int error;
++
++ error = device_create_file(&dev->dev, &dev_attr_physical_device);
++ if (error)
++ goto fail1;
++
++ error = device_create_file(&dev->dev, &dev_attr_mode);
++ if (error)
++ goto fail2;
++
++ error = sysfs_create_group(&dev->dev.kobj, &vbdstat_group);
++ if (error)
++ goto fail3;
++
++ return 0;
++
++fail3: sysfs_remove_group(&dev->dev.kobj, &vbdstat_group);
++fail2: device_remove_file(&dev->dev, &dev_attr_mode);
++fail1: device_remove_file(&dev->dev, &dev_attr_physical_device);
++ return error;
++}
++
++void xenvbd_sysfs_delif(struct xenbus_device *dev)
++{
++ sysfs_remove_group(&dev->dev.kobj, &vbdstat_group);
++ device_remove_file(&dev->dev, &dev_attr_mode);
++ device_remove_file(&dev->dev, &dev_attr_physical_device);
++}
++
++static int blkback_remove(struct xenbus_device *dev)
++{
++ struct backend_info *be = dev->dev.driver_data;
++
++ DPRINTK("");
++
++ if (be->major || be->minor)
++ xenvbd_sysfs_delif(dev);
++
++ if (be->backend_watch.node) {
++ unregister_xenbus_watch(&be->backend_watch);
++ kfree(be->backend_watch.node);
++ be->backend_watch.node = NULL;
++ }
++
++ if (be->blkif) {
++ blkif_disconnect(be->blkif);
++ vbd_free(&be->blkif->vbd);
++ blkif_free(be->blkif);
++ be->blkif = NULL;
++ }
++
++ kfree(be);
++ dev->dev.driver_data = NULL;
++ return 0;
++}
++
++int blkback_barrier(struct xenbus_transaction xbt,
++ struct backend_info *be, int state)
++{
++ struct xenbus_device *dev = be->dev;
++ int err;
++
++ err = xenbus_printf(xbt, dev->nodename, "feature-barrier",
++ "%d", state);
++ if (err)
++ xenbus_dev_fatal(dev, err, "writing feature-barrier");
++
++ return err;
++}
++
++/**
++ * Entry point to this code when a new device is created. Allocate the basic
++ * structures, and watch the store waiting for the hotplug scripts to tell us
++ * the device's physical major and minor numbers. Switch to InitWait.
++ */
++static int blkback_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int err;
++ struct backend_info *be = kzalloc(sizeof(struct backend_info),
++ GFP_KERNEL);
++ if (!be) {
++ xenbus_dev_fatal(dev, -ENOMEM,
++ "allocating backend structure");
++ return -ENOMEM;
++ }
++ be->dev = dev;
++ dev->dev.driver_data = be;
++
++ be->blkif = blkif_alloc(dev->otherend_id);
++ if (IS_ERR(be->blkif)) {
++ err = PTR_ERR(be->blkif);
++ be->blkif = NULL;
++ xenbus_dev_fatal(dev, err, "creating block interface");
++ goto fail;
++ }
++
++ /* setup back pointer */
++ be->blkif->be = be;
++
++ err = xenbus_watch_path2(dev, dev->nodename, "physical-device",
++ &be->backend_watch, backend_changed);
++ if (err)
++ goto fail;
++
++ err = xenbus_switch_state(dev, XenbusStateInitWait);
++ if (err)
++ goto fail;
++
++ return 0;
++
++fail:
++ DPRINTK("failed");
++ blkback_remove(dev);
++ return err;
++}
++
++
++/**
++ * Callback received when the hotplug scripts have placed the physical-device
++ * node. Read it and the mode node, and create a vbd. If the frontend is
++ * ready, connect.
++ */
++static void backend_changed(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ int err;
++ unsigned major;
++ unsigned minor;
++ struct backend_info *be
++ = container_of(watch, struct backend_info, backend_watch);
++ struct xenbus_device *dev = be->dev;
++ int cdrom = 0;
++ char *device_type;
++
++ DPRINTK("");
++
++ err = xenbus_scanf(XBT_NIL, dev->nodename, "physical-device", "%x:%x",
++ &major, &minor);
++ if (XENBUS_EXIST_ERR(err)) {
++ /* Since this watch will fire once immediately after it is
++ registered, we expect this. Ignore it, and wait for the
++ hotplug scripts. */
++ return;
++ }
++ if (err != 2) {
++ xenbus_dev_fatal(dev, err, "reading physical-device");
++ return;
++ }
++
++ if ((be->major || be->minor) &&
++ ((be->major != major) || (be->minor != minor))) {
++ printk(KERN_WARNING
++ "blkback: changing physical device (from %x:%x to "
++ "%x:%x) not supported.\n", be->major, be->minor,
++ major, minor);
++ return;
++ }
++
++ be->mode = xenbus_read(XBT_NIL, dev->nodename, "mode", NULL);
++ if (IS_ERR(be->mode)) {
++ err = PTR_ERR(be->mode);
++ be->mode = NULL;
++ xenbus_dev_fatal(dev, err, "reading mode");
++ return;
++ }
++
++ device_type = xenbus_read(XBT_NIL, dev->otherend, "device-type", NULL);
++ if (!IS_ERR(device_type)) {
++ cdrom = strcmp(device_type, "cdrom") == 0;
++ kfree(device_type);
++ }
++
++ if (be->major == 0 && be->minor == 0) {
++ /* Front end dir is a number, which is used as the handle. */
++
++ char *p = strrchr(dev->otherend, '/') + 1;
++ long handle = simple_strtoul(p, NULL, 0);
++
++ be->major = major;
++ be->minor = minor;
++
++ err = vbd_create(be->blkif, handle, major, minor,
++ (NULL == strchr(be->mode, 'w')), cdrom);
++ if (err) {
++ be->major = be->minor = 0;
++ xenbus_dev_fatal(dev, err, "creating vbd structure");
++ return;
++ }
++
++ err = xenvbd_sysfs_addif(dev);
++ if (err) {
++ vbd_free(&be->blkif->vbd);
++ be->major = be->minor = 0;
++ xenbus_dev_fatal(dev, err, "creating sysfs entries");
++ return;
++ }
++
++ /* We're potentially connected now */
++ update_blkif_status(be->blkif);
++ }
++}
++
++
++/**
++ * Callback received when the frontend's state changes.
++ */
++static void frontend_changed(struct xenbus_device *dev,
++ enum xenbus_state frontend_state)
++{
++ struct backend_info *be = dev->dev.driver_data;
++ int err;
++
++ DPRINTK("%s", xenbus_strstate(frontend_state));
++
++ switch (frontend_state) {
++ case XenbusStateInitialising:
++ if (dev->state == XenbusStateClosed) {
++ printk(KERN_INFO "%s: %s: prepare for reconnect\n",
++ __FUNCTION__, dev->nodename);
++ xenbus_switch_state(dev, XenbusStateInitWait);
++ }
++ break;
++
++ case XenbusStateInitialised:
++ case XenbusStateConnected:
++ /* Ensure we connect even when two watches fire in
++ close successsion and we miss the intermediate value
++ of frontend_state. */
++ if (dev->state == XenbusStateConnected)
++ break;
++
++ err = connect_ring(be);
++ if (err)
++ break;
++ update_blkif_status(be->blkif);
++ break;
++
++ case XenbusStateClosing:
++ blkif_disconnect(be->blkif);
++ xenbus_switch_state(dev, XenbusStateClosing);
++ break;
++
++ case XenbusStateClosed:
++ xenbus_switch_state(dev, XenbusStateClosed);
++ if (xenbus_dev_is_online(dev))
++ break;
++ /* fall through if not online */
++ case XenbusStateUnknown:
++ device_unregister(&dev->dev);
++ break;
++
++ default:
++ xenbus_dev_fatal(dev, -EINVAL, "saw state %d at frontend",
++ frontend_state);
++ break;
++ }
++}
++
++
++/* ** Connection ** */
++
++
++/**
++ * Write the physical details regarding the block device to the store, and
++ * switch to Connected state.
++ */
++static void connect(struct backend_info *be)
++{
++ struct xenbus_transaction xbt;
++ int err;
++ struct xenbus_device *dev = be->dev;
++
++ DPRINTK("%s", dev->otherend);
++
++ /* Supply the information about the device the frontend needs */
++again:
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "starting transaction");
++ return;
++ }
++
++ err = blkback_barrier(xbt, be, 1);
++ if (err)
++ goto abort;
++
++ err = xenbus_printf(xbt, dev->nodename, "sectors", "%llu",
++ vbd_size(&be->blkif->vbd));
++ if (err) {
++ xenbus_dev_fatal(dev, err, "writing %s/sectors",
++ dev->nodename);
++ goto abort;
++ }
++
++ /* FIXME: use a typename instead */
++ err = xenbus_printf(xbt, dev->nodename, "info", "%u",
++ vbd_info(&be->blkif->vbd));
++ if (err) {
++ xenbus_dev_fatal(dev, err, "writing %s/info",
++ dev->nodename);
++ goto abort;
++ }
++ err = xenbus_printf(xbt, dev->nodename, "sector-size", "%lu",
++ vbd_secsize(&be->blkif->vbd));
++ if (err) {
++ xenbus_dev_fatal(dev, err, "writing %s/sector-size",
++ dev->nodename);
++ goto abort;
++ }
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err == -EAGAIN)
++ goto again;
++ if (err)
++ xenbus_dev_fatal(dev, err, "ending transaction");
++
++ err = xenbus_switch_state(dev, XenbusStateConnected);
++ if (err)
++ xenbus_dev_fatal(dev, err, "switching to Connected state",
++ dev->nodename);
++
++ return;
++ abort:
++ xenbus_transaction_end(xbt, 1);
++}
++
++
++static int connect_ring(struct backend_info *be)
++{
++ struct xenbus_device *dev = be->dev;
++ unsigned long ring_ref;
++ unsigned int evtchn;
++ char protocol[64] = "";
++ int err;
++
++ DPRINTK("%s", dev->otherend);
++
++ err = xenbus_gather(XBT_NIL, dev->otherend, "ring-ref", "%lu", &ring_ref,
++ "event-channel", "%u", &evtchn, NULL);
++ if (err) {
++ xenbus_dev_fatal(dev, err,
++ "reading %s/ring-ref and event-channel",
++ dev->otherend);
++ return err;
++ }
++
++ be->blkif->blk_protocol = BLKIF_PROTOCOL_NATIVE;
++ err = xenbus_gather(XBT_NIL, dev->otherend, "protocol",
++ "%63s", protocol, NULL);
++ if (err)
++ strcpy(protocol, "unspecified, assuming native");
++ else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_NATIVE))
++ be->blkif->blk_protocol = BLKIF_PROTOCOL_NATIVE;
++ else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_X86_32))
++ be->blkif->blk_protocol = BLKIF_PROTOCOL_X86_32;
++ else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_X86_64))
++ be->blkif->blk_protocol = BLKIF_PROTOCOL_X86_64;
++ else {
++ xenbus_dev_fatal(dev, err, "unknown fe protocol %s", protocol);
++ return -1;
++ }
++ printk(KERN_INFO
++ "blkback: ring-ref %ld, event-channel %d, protocol %d (%s)\n",
++ ring_ref, evtchn, be->blkif->blk_protocol, protocol);
++
++ /* Map the shared frame, irq etc. */
++ err = blkif_map(be->blkif, ring_ref, evtchn);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "mapping ring-ref %lu port %u",
++ ring_ref, evtchn);
++ return err;
++ }
++
++ return 0;
++}
++
++
++/* ** Driver Registration ** */
++
++
++static const struct xenbus_device_id blkback_ids[] = {
++ { "vbd" },
++ { "" }
++};
++
++
++static struct xenbus_driver blkback = {
++ .name = "vbd",
++ .owner = THIS_MODULE,
++ .ids = blkback_ids,
++ .probe = blkback_probe,
++ .remove = blkback_remove,
++ .otherend_changed = frontend_changed
++};
++
++
++void blkif_xenbus_init(void)
++{
++ xenbus_register_backend(&blkback);
++}
+Index: head-2008-11-25/drivers/xen/blkfront/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkfront/Makefile 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,5 @@
++
++obj-$(CONFIG_XEN_BLKDEV_FRONTEND) := xenblk.o
++
++xenblk-objs := blkfront.o vbd.o
++
+Index: head-2008-11-25/drivers/xen/blkfront/blkfront.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkfront/blkfront.c 2008-08-07 12:44:36.000000000 +0200
+@@ -0,0 +1,936 @@
++/******************************************************************************
++ * blkfront.c
++ *
++ * XenLinux virtual block-device driver.
++ *
++ * Copyright (c) 2003-2004, Keir Fraser & Steve Hand
++ * Modifications by Mark A. Williamson are (c) Intel Research Cambridge
++ * Copyright (c) 2004, Christian Limpach
++ * Copyright (c) 2004, Andrew Warfield
++ * Copyright (c) 2005, Christopher Clark
++ * Copyright (c) 2005, XenSource Ltd
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/version.h>
++#include "block.h"
++#include <linux/cdrom.h>
++#include <linux/sched.h>
++#include <linux/interrupt.h>
++#include <scsi/scsi.h>
++#include <xen/evtchn.h>
++#include <xen/xenbus.h>
++#include <xen/interface/grant_table.h>
++#include <xen/interface/io/protocols.h>
++#include <xen/gnttab.h>
++#include <asm/hypervisor.h>
++#include <asm/maddr.h>
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++#define BLKIF_STATE_DISCONNECTED 0
++#define BLKIF_STATE_CONNECTED 1
++#define BLKIF_STATE_SUSPENDED 2
++
++#define MAXIMUM_OUTSTANDING_BLOCK_REQS \
++ (BLKIF_MAX_SEGMENTS_PER_REQUEST * BLK_RING_SIZE)
++#define GRANT_INVALID_REF 0
++
++static void connect(struct blkfront_info *);
++static void blkfront_closing(struct xenbus_device *);
++static int blkfront_remove(struct xenbus_device *);
++static int talk_to_backend(struct xenbus_device *, struct blkfront_info *);
++static int setup_blkring(struct xenbus_device *, struct blkfront_info *);
++
++static void kick_pending_request_queues(struct blkfront_info *);
++
++static irqreturn_t blkif_int(int irq, void *dev_id, struct pt_regs *ptregs);
++static void blkif_restart_queue(void *arg);
++static void blkif_recover(struct blkfront_info *);
++static void blkif_completion(struct blk_shadow *);
++static void blkif_free(struct blkfront_info *, int);
++
++
++/**
++ * Entry point to this code when a new device is created. Allocate the basic
++ * structures and the ring buffer for communication with the backend, and
++ * inform the backend of the appropriate details for those. Switch to
++ * Initialised state.
++ */
++static int blkfront_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int err, vdevice, i;
++ struct blkfront_info *info;
++
++ /* FIXME: Use dynamic device id if this is not set. */
++ err = xenbus_scanf(XBT_NIL, dev->nodename,
++ "virtual-device", "%i", &vdevice);
++ if (err != 1) {
++ /* go looking in the extended area instead */
++ err = xenbus_scanf(XBT_NIL, dev->nodename, "virtual-device-ext",
++ "%i", &vdevice);
++ if (err != 1) {
++ xenbus_dev_fatal(dev, err, "reading virtual-device");
++ return err;
++ }
++ }
++
++ info = kzalloc(sizeof(*info), GFP_KERNEL);
++ if (!info) {
++ xenbus_dev_fatal(dev, -ENOMEM, "allocating info structure");
++ return -ENOMEM;
++ }
++
++ info->xbdev = dev;
++ info->vdevice = vdevice;
++ info->connected = BLKIF_STATE_DISCONNECTED;
++ INIT_WORK(&info->work, blkif_restart_queue, (void *)info);
++
++ for (i = 0; i < BLK_RING_SIZE; i++)
++ info->shadow[i].req.id = i+1;
++ info->shadow[BLK_RING_SIZE-1].req.id = 0x0fffffff;
++
++ /* Front end dir is a number, which is used as the id. */
++ info->handle = simple_strtoul(strrchr(dev->nodename,'/')+1, NULL, 0);
++ dev->dev.driver_data = info;
++
++ err = talk_to_backend(dev, info);
++ if (err) {
++ kfree(info);
++ dev->dev.driver_data = NULL;
++ return err;
++ }
++
++ return 0;
++}
++
++
++/**
++ * We are reconnecting to the backend, due to a suspend/resume, or a backend
++ * driver restart. We tear down our blkif structure and recreate it, but
++ * leave the device-layer structures intact so that this is transparent to the
++ * rest of the kernel.
++ */
++static int blkfront_resume(struct xenbus_device *dev)
++{
++ struct blkfront_info *info = dev->dev.driver_data;
++ int err;
++
++ DPRINTK("blkfront_resume: %s\n", dev->nodename);
++
++ blkif_free(info, info->connected == BLKIF_STATE_CONNECTED);
++
++ err = talk_to_backend(dev, info);
++ if (info->connected == BLKIF_STATE_SUSPENDED && !err)
++ blkif_recover(info);
++
++ return err;
++}
++
++
++/* Common code used when first setting up, and when resuming. */
++static int talk_to_backend(struct xenbus_device *dev,
++ struct blkfront_info *info)
++{
++ const char *message = NULL;
++ struct xenbus_transaction xbt;
++ int err;
++
++ /* Create shared ring, alloc event channel. */
++ err = setup_blkring(dev, info);
++ if (err)
++ goto out;
++
++again:
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "starting transaction");
++ goto destroy_blkring;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename,
++ "ring-ref","%u", info->ring_ref);
++ if (err) {
++ message = "writing ring-ref";
++ goto abort_transaction;
++ }
++ err = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
++ irq_to_evtchn_port(info->irq));
++ if (err) {
++ message = "writing event-channel";
++ goto abort_transaction;
++ }
++ err = xenbus_printf(xbt, dev->nodename, "protocol", "%s",
++ XEN_IO_PROTO_ABI_NATIVE);
++ if (err) {
++ message = "writing protocol";
++ goto abort_transaction;
++ }
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err) {
++ if (err == -EAGAIN)
++ goto again;
++ xenbus_dev_fatal(dev, err, "completing transaction");
++ goto destroy_blkring;
++ }
++
++ xenbus_switch_state(dev, XenbusStateInitialised);
++
++ return 0;
++
++ abort_transaction:
++ xenbus_transaction_end(xbt, 1);
++ if (message)
++ xenbus_dev_fatal(dev, err, "%s", message);
++ destroy_blkring:
++ blkif_free(info, 0);
++ out:
++ return err;
++}
++
++
++static int setup_blkring(struct xenbus_device *dev,
++ struct blkfront_info *info)
++{
++ blkif_sring_t *sring;
++ int err;
++
++ info->ring_ref = GRANT_INVALID_REF;
++
++ sring = (blkif_sring_t *)__get_free_page(GFP_NOIO | __GFP_HIGH);
++ if (!sring) {
++ xenbus_dev_fatal(dev, -ENOMEM, "allocating shared ring");
++ return -ENOMEM;
++ }
++ SHARED_RING_INIT(sring);
++ FRONT_RING_INIT(&info->ring, sring, PAGE_SIZE);
++
++ err = xenbus_grant_ring(dev, virt_to_mfn(info->ring.sring));
++ if (err < 0) {
++ free_page((unsigned long)sring);
++ info->ring.sring = NULL;
++ goto fail;
++ }
++ info->ring_ref = err;
++
++ err = bind_listening_port_to_irqhandler(
++ dev->otherend_id, blkif_int, SA_SAMPLE_RANDOM, "blkif", info);
++ if (err <= 0) {
++ xenbus_dev_fatal(dev, err,
++ "bind_listening_port_to_irqhandler");
++ goto fail;
++ }
++ info->irq = err;
++
++ return 0;
++fail:
++ blkif_free(info, 0);
++ return err;
++}
++
++
++/**
++ * Callback received when the backend's state changes.
++ */
++static void backend_changed(struct xenbus_device *dev,
++ enum xenbus_state backend_state)
++{
++ struct blkfront_info *info = dev->dev.driver_data;
++ struct block_device *bd;
++
++ DPRINTK("blkfront:backend_changed.\n");
++
++ switch (backend_state) {
++ case XenbusStateInitialising:
++ case XenbusStateInitWait:
++ case XenbusStateInitialised:
++ case XenbusStateReconfiguring:
++ case XenbusStateReconfigured:
++ case XenbusStateUnknown:
++ case XenbusStateClosed:
++ break;
++
++ case XenbusStateConnected:
++ connect(info);
++ break;
++
++ case XenbusStateClosing:
++ bd = bdget(info->dev);
++ if (bd == NULL)
++ xenbus_dev_fatal(dev, -ENODEV, "bdget failed");
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
++ down(&bd->bd_sem);
++#else
++ mutex_lock(&bd->bd_mutex);
++#endif
++ if (info->users > 0)
++ xenbus_dev_error(dev, -EBUSY,
++ "Device in use; refusing to close");
++ else
++ blkfront_closing(dev);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17)
++ up(&bd->bd_sem);
++#else
++ mutex_unlock(&bd->bd_mutex);
++#endif
++ bdput(bd);
++ break;
++ }
++}
++
++
++/* ** Connection ** */
++
++
++/*
++ * Invoked when the backend is finally 'ready' (and has told produced
++ * the details about the physical device - #sectors, size, etc).
++ */
++static void connect(struct blkfront_info *info)
++{
++ unsigned long long sectors;
++ unsigned long sector_size;
++ unsigned int binfo;
++ int err;
++
++ if ((info->connected == BLKIF_STATE_CONNECTED) ||
++ (info->connected == BLKIF_STATE_SUSPENDED) )
++ return;
++
++ DPRINTK("blkfront.c:connect:%s.\n", info->xbdev->otherend);
++
++ err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
++ "sectors", "%Lu", §ors,
++ "info", "%u", &binfo,
++ "sector-size", "%lu", §or_size,
++ NULL);
++ if (err) {
++ xenbus_dev_fatal(info->xbdev, err,
++ "reading backend fields at %s",
++ info->xbdev->otherend);
++ return;
++ }
++
++ err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
++ "feature-barrier", "%lu", &info->feature_barrier,
++ NULL);
++ if (err)
++ info->feature_barrier = 0;
++
++ err = xlvbd_add(sectors, info->vdevice, binfo, sector_size, info);
++ if (err) {
++ xenbus_dev_fatal(info->xbdev, err, "xlvbd_add at %s",
++ info->xbdev->otherend);
++ return;
++ }
++
++ err = xlvbd_sysfs_addif(info);
++ if (err) {
++ xenbus_dev_fatal(info->xbdev, err, "xlvbd_sysfs_addif at %s",
++ info->xbdev->otherend);
++ return;
++ }
++
++ (void)xenbus_switch_state(info->xbdev, XenbusStateConnected);
++
++ /* Kick pending requests. */
++ spin_lock_irq(&blkif_io_lock);
++ info->connected = BLKIF_STATE_CONNECTED;
++ kick_pending_request_queues(info);
++ spin_unlock_irq(&blkif_io_lock);
++
++ add_disk(info->gd);
++
++ info->is_ready = 1;
++}
++
++/**
++ * Handle the change of state of the backend to Closing. We must delete our
++ * device-layer structures now, to ensure that writes are flushed through to
++ * the backend. Once is this done, we can switch to Closed in
++ * acknowledgement.
++ */
++static void blkfront_closing(struct xenbus_device *dev)
++{
++ struct blkfront_info *info = dev->dev.driver_data;
++ unsigned long flags;
++
++ DPRINTK("blkfront_closing: %s removed\n", dev->nodename);
++
++ if (info->rq == NULL)
++ goto out;
++
++ spin_lock_irqsave(&blkif_io_lock, flags);
++ /* No more blkif_request(). */
++ blk_stop_queue(info->rq);
++ /* No more gnttab callback work. */
++ gnttab_cancel_free_callback(&info->callback);
++ spin_unlock_irqrestore(&blkif_io_lock, flags);
++
++ /* Flush gnttab callback work. Must be done with no locks held. */
++ flush_scheduled_work();
++
++ xlvbd_sysfs_delif(info);
++
++ xlvbd_del(info);
++
++ out:
++ xenbus_frontend_closed(dev);
++}
++
++
++static int blkfront_remove(struct xenbus_device *dev)
++{
++ struct blkfront_info *info = dev->dev.driver_data;
++
++ DPRINTK("blkfront_remove: %s removed\n", dev->nodename);
++
++ blkif_free(info, 0);
++
++ kfree(info);
++
++ return 0;
++}
++
++
++static inline int GET_ID_FROM_FREELIST(
++ struct blkfront_info *info)
++{
++ unsigned long free = info->shadow_free;
++ BUG_ON(free > BLK_RING_SIZE);
++ info->shadow_free = info->shadow[free].req.id;
++ info->shadow[free].req.id = 0x0fffffee; /* debug */
++ return free;
++}
++
++static inline void ADD_ID_TO_FREELIST(
++ struct blkfront_info *info, unsigned long id)
++{
++ info->shadow[id].req.id = info->shadow_free;
++ info->shadow[id].request = 0;
++ info->shadow_free = id;
++}
++
++static inline void flush_requests(struct blkfront_info *info)
++{
++ int notify;
++
++ RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&info->ring, notify);
++
++ if (notify)
++ notify_remote_via_irq(info->irq);
++}
++
++static void kick_pending_request_queues(struct blkfront_info *info)
++{
++ if (!RING_FULL(&info->ring)) {
++ /* Re-enable calldowns. */
++ blk_start_queue(info->rq);
++ /* Kick things off immediately. */
++ do_blkif_request(info->rq);
++ }
++}
++
++static void blkif_restart_queue(void *arg)
++{
++ struct blkfront_info *info = (struct blkfront_info *)arg;
++ spin_lock_irq(&blkif_io_lock);
++ if (info->connected == BLKIF_STATE_CONNECTED)
++ kick_pending_request_queues(info);
++ spin_unlock_irq(&blkif_io_lock);
++}
++
++static void blkif_restart_queue_callback(void *arg)
++{
++ struct blkfront_info *info = (struct blkfront_info *)arg;
++ schedule_work(&info->work);
++}
++
++int blkif_open(struct inode *inode, struct file *filep)
++{
++ struct blkfront_info *info = inode->i_bdev->bd_disk->private_data;
++ info->users++;
++ return 0;
++}
++
++
++int blkif_release(struct inode *inode, struct file *filep)
++{
++ struct blkfront_info *info = inode->i_bdev->bd_disk->private_data;
++ info->users--;
++ if (info->users == 0) {
++ /* Check whether we have been instructed to close. We will
++ have ignored this request initially, as the device was
++ still mounted. */
++ struct xenbus_device * dev = info->xbdev;
++ enum xenbus_state state = xenbus_read_driver_state(dev->otherend);
++
++ if (state == XenbusStateClosing && info->is_ready)
++ blkfront_closing(dev);
++ }
++ return 0;
++}
++
++
++int blkif_ioctl(struct inode *inode, struct file *filep,
++ unsigned command, unsigned long argument)
++{
++ int i;
++
++ DPRINTK_IOCTL("command: 0x%x, argument: 0x%lx, dev: 0x%04x\n",
++ command, (long)argument, inode->i_rdev);
++
++ switch (command) {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
++ case HDIO_GETGEO: {
++ struct block_device *bd = inode->i_bdev;
++ struct hd_geometry geo;
++ int ret;
++
++ if (!argument)
++ return -EINVAL;
++
++ geo.start = get_start_sect(bd);
++ ret = blkif_getgeo(bd, &geo);
++ if (ret)
++ return ret;
++
++ if (copy_to_user((struct hd_geometry __user *)argument, &geo,
++ sizeof(geo)))
++ return -EFAULT;
++
++ return 0;
++ }
++#endif
++ case CDROMMULTISESSION:
++ DPRINTK("FIXME: support multisession CDs later\n");
++ for (i = 0; i < sizeof(struct cdrom_multisession); i++)
++ if (put_user(0, (char __user *)(argument + i)))
++ return -EFAULT;
++ return 0;
++
++ case CDROM_GET_CAPABILITY: {
++ struct blkfront_info *info =
++ inode->i_bdev->bd_disk->private_data;
++ struct gendisk *gd = info->gd;
++ if (gd->flags & GENHD_FL_CD)
++ return 0;
++ return -EINVAL;
++ }
++ default:
++ /*printk(KERN_ALERT "ioctl %08x not supported by Xen blkdev\n",
++ command);*/
++ return -EINVAL; /* same return as native Linux */
++ }
++
++ return 0;
++}
++
++
++int blkif_getgeo(struct block_device *bd, struct hd_geometry *hg)
++{
++ /* We don't have real geometry info, but let's at least return
++ values consistent with the size of the device */
++ sector_t nsect = get_capacity(bd->bd_disk);
++ sector_t cylinders = nsect;
++
++ hg->heads = 0xff;
++ hg->sectors = 0x3f;
++ sector_div(cylinders, hg->heads * hg->sectors);
++ hg->cylinders = cylinders;
++ if ((sector_t)(hg->cylinders + 1) * hg->heads * hg->sectors < nsect)
++ hg->cylinders = 0xffff;
++ return 0;
++}
++
++
++/*
++ * blkif_queue_request
++ *
++ * request block io
++ *
++ * id: for guest use only.
++ * operation: BLKIF_OP_{READ,WRITE,PROBE}
++ * buffer: buffer to read/write into. this should be a
++ * virtual address in the guest os.
++ */
++static int blkif_queue_request(struct request *req)
++{
++ struct blkfront_info *info = req->rq_disk->private_data;
++ unsigned long buffer_mfn;
++ blkif_request_t *ring_req;
++ struct bio *bio;
++ struct bio_vec *bvec;
++ int idx;
++ unsigned long id;
++ unsigned int fsect, lsect;
++ int ref;
++ grant_ref_t gref_head;
++
++ if (unlikely(info->connected != BLKIF_STATE_CONNECTED))
++ return 1;
++
++ if (gnttab_alloc_grant_references(
++ BLKIF_MAX_SEGMENTS_PER_REQUEST, &gref_head) < 0) {
++ gnttab_request_free_callback(
++ &info->callback,
++ blkif_restart_queue_callback,
++ info,
++ BLKIF_MAX_SEGMENTS_PER_REQUEST);
++ return 1;
++ }
++
++ /* Fill out a communications ring structure. */
++ ring_req = RING_GET_REQUEST(&info->ring, info->ring.req_prod_pvt);
++ id = GET_ID_FROM_FREELIST(info);
++ info->shadow[id].request = (unsigned long)req;
++
++ ring_req->id = id;
++ ring_req->sector_number = (blkif_sector_t)req->sector;
++ ring_req->handle = info->handle;
++
++ ring_req->operation = rq_data_dir(req) ?
++ BLKIF_OP_WRITE : BLKIF_OP_READ;
++ if (blk_barrier_rq(req))
++ ring_req->operation = BLKIF_OP_WRITE_BARRIER;
++
++ ring_req->nr_segments = 0;
++ rq_for_each_bio (bio, req) {
++ bio_for_each_segment (bvec, bio, idx) {
++ BUG_ON(ring_req->nr_segments
++ == BLKIF_MAX_SEGMENTS_PER_REQUEST);
++ buffer_mfn = page_to_phys(bvec->bv_page) >> PAGE_SHIFT;
++ fsect = bvec->bv_offset >> 9;
++ lsect = fsect + (bvec->bv_len >> 9) - 1;
++ /* install a grant reference. */
++ ref = gnttab_claim_grant_reference(&gref_head);
++ BUG_ON(ref == -ENOSPC);
++
++ gnttab_grant_foreign_access_ref(
++ ref,
++ info->xbdev->otherend_id,
++ buffer_mfn,
++ rq_data_dir(req) ? GTF_readonly : 0 );
++
++ info->shadow[id].frame[ring_req->nr_segments] =
++ mfn_to_pfn(buffer_mfn);
++
++ ring_req->seg[ring_req->nr_segments] =
++ (struct blkif_request_segment) {
++ .gref = ref,
++ .first_sect = fsect,
++ .last_sect = lsect };
++
++ ring_req->nr_segments++;
++ }
++ }
++
++ info->ring.req_prod_pvt++;
++
++ /* Keep a private copy so we can reissue requests when recovering. */
++ info->shadow[id].req = *ring_req;
++
++ gnttab_free_grant_references(gref_head);
++
++ return 0;
++}
++
++/*
++ * do_blkif_request
++ * read a block; request is in a request queue
++ */
++void do_blkif_request(request_queue_t *rq)
++{
++ struct blkfront_info *info = NULL;
++ struct request *req;
++ int queued;
++
++ DPRINTK("Entered do_blkif_request\n");
++
++ queued = 0;
++
++ while ((req = elv_next_request(rq)) != NULL) {
++ info = req->rq_disk->private_data;
++ if (!blk_fs_request(req)) {
++ end_request(req, 0);
++ continue;
++ }
++
++ if (RING_FULL(&info->ring))
++ goto wait;
++
++ DPRINTK("do_blk_req %p: cmd %p, sec %llx, "
++ "(%u/%li) buffer:%p [%s]\n",
++ req, req->cmd, (long long)req->sector,
++ req->current_nr_sectors,
++ req->nr_sectors, req->buffer,
++ rq_data_dir(req) ? "write" : "read");
++
++
++ blkdev_dequeue_request(req);
++ if (blkif_queue_request(req)) {
++ blk_requeue_request(rq, req);
++ wait:
++ /* Avoid pointless unplugs. */
++ blk_stop_queue(rq);
++ break;
++ }
++
++ queued++;
++ }
++
++ if (queued != 0)
++ flush_requests(info);
++}
++
++
++static irqreturn_t blkif_int(int irq, void *dev_id, struct pt_regs *ptregs)
++{
++ struct request *req;
++ blkif_response_t *bret;
++ RING_IDX i, rp;
++ unsigned long flags;
++ struct blkfront_info *info = (struct blkfront_info *)dev_id;
++ int uptodate;
++
++ spin_lock_irqsave(&blkif_io_lock, flags);
++
++ if (unlikely(info->connected != BLKIF_STATE_CONNECTED)) {
++ spin_unlock_irqrestore(&blkif_io_lock, flags);
++ return IRQ_HANDLED;
++ }
++
++ again:
++ rp = info->ring.sring->rsp_prod;
++ rmb(); /* Ensure we see queued responses up to 'rp'. */
++
++ for (i = info->ring.rsp_cons; i != rp; i++) {
++ unsigned long id;
++ int ret;
++
++ bret = RING_GET_RESPONSE(&info->ring, i);
++ id = bret->id;
++ req = (struct request *)info->shadow[id].request;
++
++ blkif_completion(&info->shadow[id]);
++
++ ADD_ID_TO_FREELIST(info, id);
++
++ uptodate = (bret->status == BLKIF_RSP_OKAY);
++ switch (bret->operation) {
++ case BLKIF_OP_WRITE_BARRIER:
++ if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
++ printk("blkfront: %s: write barrier op failed\n",
++ info->gd->disk_name);
++ uptodate = -EOPNOTSUPP;
++ info->feature_barrier = 0;
++ xlvbd_barrier(info);
++ }
++ /* fall through */
++ case BLKIF_OP_READ:
++ case BLKIF_OP_WRITE:
++ if (unlikely(bret->status != BLKIF_RSP_OKAY))
++ DPRINTK("Bad return from blkdev data "
++ "request: %x\n", bret->status);
++
++ ret = end_that_request_first(req, uptodate,
++ req->hard_nr_sectors);
++ BUG_ON(ret);
++ end_that_request_last(req, uptodate);
++ break;
++ default:
++ BUG();
++ }
++ }
++
++ info->ring.rsp_cons = i;
++
++ if (i != info->ring.req_prod_pvt) {
++ int more_to_do;
++ RING_FINAL_CHECK_FOR_RESPONSES(&info->ring, more_to_do);
++ if (more_to_do)
++ goto again;
++ } else
++ info->ring.sring->rsp_event = i + 1;
++
++ kick_pending_request_queues(info);
++
++ spin_unlock_irqrestore(&blkif_io_lock, flags);
++
++ return IRQ_HANDLED;
++}
++
++static void blkif_free(struct blkfront_info *info, int suspend)
++{
++ /* Prevent new requests being issued until we fix things up. */
++ spin_lock_irq(&blkif_io_lock);
++ info->connected = suspend ?
++ BLKIF_STATE_SUSPENDED : BLKIF_STATE_DISCONNECTED;
++ /* No more blkif_request(). */
++ if (info->rq)
++ blk_stop_queue(info->rq);
++ /* No more gnttab callback work. */
++ gnttab_cancel_free_callback(&info->callback);
++ spin_unlock_irq(&blkif_io_lock);
++
++ /* Flush gnttab callback work. Must be done with no locks held. */
++ flush_scheduled_work();
++
++ /* Free resources associated with old device channel. */
++ if (info->ring_ref != GRANT_INVALID_REF) {
++ gnttab_end_foreign_access(info->ring_ref,
++ (unsigned long)info->ring.sring);
++ info->ring_ref = GRANT_INVALID_REF;
++ info->ring.sring = NULL;
++ }
++ if (info->irq)
++ unbind_from_irqhandler(info->irq, info);
++ info->irq = 0;
++}
++
++static void blkif_completion(struct blk_shadow *s)
++{
++ int i;
++ for (i = 0; i < s->req.nr_segments; i++)
++ gnttab_end_foreign_access(s->req.seg[i].gref, 0UL);
++}
++
++static void blkif_recover(struct blkfront_info *info)
++{
++ int i;
++ blkif_request_t *req;
++ struct blk_shadow *copy;
++ int j;
++
++ /* Stage 1: Make a safe copy of the shadow state. */
++ copy = kmalloc(sizeof(info->shadow), GFP_NOIO | __GFP_NOFAIL | __GFP_HIGH);
++ memcpy(copy, info->shadow, sizeof(info->shadow));
++
++ /* Stage 2: Set up free list. */
++ memset(&info->shadow, 0, sizeof(info->shadow));
++ for (i = 0; i < BLK_RING_SIZE; i++)
++ info->shadow[i].req.id = i+1;
++ info->shadow_free = info->ring.req_prod_pvt;
++ info->shadow[BLK_RING_SIZE-1].req.id = 0x0fffffff;
++
++ /* Stage 3: Find pending requests and requeue them. */
++ for (i = 0; i < BLK_RING_SIZE; i++) {
++ /* Not in use? */
++ if (copy[i].request == 0)
++ continue;
++
++ /* Grab a request slot and copy shadow state into it. */
++ req = RING_GET_REQUEST(
++ &info->ring, info->ring.req_prod_pvt);
++ *req = copy[i].req;
++
++ /* We get a new request id, and must reset the shadow state. */
++ req->id = GET_ID_FROM_FREELIST(info);
++ memcpy(&info->shadow[req->id], ©[i], sizeof(copy[i]));
++
++ /* Rewrite any grant references invalidated by susp/resume. */
++ for (j = 0; j < req->nr_segments; j++)
++ gnttab_grant_foreign_access_ref(
++ req->seg[j].gref,
++ info->xbdev->otherend_id,
++ pfn_to_mfn(info->shadow[req->id].frame[j]),
++ rq_data_dir((struct request *)
++ info->shadow[req->id].request) ?
++ GTF_readonly : 0);
++ info->shadow[req->id].req = *req;
++
++ info->ring.req_prod_pvt++;
++ }
++
++ kfree(copy);
++
++ (void)xenbus_switch_state(info->xbdev, XenbusStateConnected);
++
++ spin_lock_irq(&blkif_io_lock);
++
++ /* Now safe for us to use the shared ring */
++ info->connected = BLKIF_STATE_CONNECTED;
++
++ /* Send off requeued requests */
++ flush_requests(info);
++
++ /* Kick any other new requests queued since we resumed */
++ kick_pending_request_queues(info);
++
++ spin_unlock_irq(&blkif_io_lock);
++}
++
++int blkfront_is_ready(struct xenbus_device *dev)
++{
++ struct blkfront_info *info = dev->dev.driver_data;
++
++ return info->is_ready;
++}
++
++
++/* ** Driver Registration ** */
++
++
++static const struct xenbus_device_id blkfront_ids[] = {
++ { "vbd" },
++ { "" }
++};
++MODULE_ALIAS("xen:vbd");
++
++static struct xenbus_driver blkfront = {
++ .name = "vbd",
++ .owner = THIS_MODULE,
++ .ids = blkfront_ids,
++ .probe = blkfront_probe,
++ .remove = blkfront_remove,
++ .resume = blkfront_resume,
++ .otherend_changed = backend_changed,
++ .is_ready = blkfront_is_ready,
++};
++
++
++static int __init xlblk_init(void)
++{
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ return xenbus_register_frontend(&blkfront);
++}
++module_init(xlblk_init);
++
++
++static void __exit xlblk_exit(void)
++{
++ return xenbus_unregister_driver(&blkfront);
++}
++module_exit(xlblk_exit);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/blkfront/block.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkfront/block.h 2008-08-07 12:44:36.000000000 +0200
+@@ -0,0 +1,158 @@
++/******************************************************************************
++ * block.h
++ *
++ * Shared definitions between all levels of XenLinux Virtual block devices.
++ *
++ * Copyright (c) 2003-2004, Keir Fraser & Steve Hand
++ * Modifications by Mark A. Williamson are (c) Intel Research Cambridge
++ * Copyright (c) 2004-2005, Christian Limpach
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_DRIVERS_BLOCK_H__
++#define __XEN_DRIVERS_BLOCK_H__
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/string.h>
++#include <linux/errno.h>
++#include <linux/fs.h>
++#include <linux/hdreg.h>
++#include <linux/blkdev.h>
++#include <linux/major.h>
++#include <asm/hypervisor.h>
++#include <xen/xenbus.h>
++#include <xen/gnttab.h>
++#include <xen/interface/xen.h>
++#include <xen/interface/io/blkif.h>
++#include <xen/interface/io/ring.h>
++#include <asm/io.h>
++#include <asm/atomic.h>
++#include <asm/uaccess.h>
++
++#define DPRINTK(_f, _a...) pr_debug(_f, ## _a)
++
++#if 0
++#define DPRINTK_IOCTL(_f, _a...) printk(KERN_ALERT _f, ## _a)
++#else
++#define DPRINTK_IOCTL(_f, _a...) ((void)0)
++#endif
++
++struct xlbd_type_info
++{
++ int partn_shift;
++ int disks_per_major;
++ char *devname;
++ char *diskname;
++};
++
++struct xlbd_major_info
++{
++ int major;
++ int index;
++ int usage;
++ struct xlbd_type_info *type;
++};
++
++struct blk_shadow {
++ blkif_request_t req;
++ unsigned long request;
++ unsigned long frame[BLKIF_MAX_SEGMENTS_PER_REQUEST];
++};
++
++#define BLK_RING_SIZE __RING_SIZE((blkif_sring_t *)0, PAGE_SIZE)
++
++/*
++ * We have one of these per vbd, whether ide, scsi or 'other'. They
++ * hang in private_data off the gendisk structure. We may end up
++ * putting all kinds of interesting stuff here :-)
++ */
++struct blkfront_info
++{
++ struct xenbus_device *xbdev;
++ dev_t dev;
++ struct gendisk *gd;
++ int vdevice;
++ blkif_vdev_t handle;
++ int connected;
++ int ring_ref;
++ blkif_front_ring_t ring;
++ unsigned int irq;
++ struct xlbd_major_info *mi;
++ request_queue_t *rq;
++ struct work_struct work;
++ struct gnttab_free_callback callback;
++ struct blk_shadow shadow[BLK_RING_SIZE];
++ unsigned long shadow_free;
++ int feature_barrier;
++ int is_ready;
++
++ /**
++ * The number of people holding this device open. We won't allow a
++ * hot-unplug unless this is 0.
++ */
++ int users;
++};
++
++extern spinlock_t blkif_io_lock;
++
++extern int blkif_open(struct inode *inode, struct file *filep);
++extern int blkif_release(struct inode *inode, struct file *filep);
++extern int blkif_ioctl(struct inode *inode, struct file *filep,
++ unsigned command, unsigned long argument);
++extern int blkif_getgeo(struct block_device *, struct hd_geometry *);
++extern int blkif_check(dev_t dev);
++extern int blkif_revalidate(dev_t dev);
++extern void do_blkif_request (request_queue_t *rq);
++
++/* Virtual block-device subsystem. */
++/* Note that xlvbd_add doesn't call add_disk for you: you're expected
++ to call add_disk on info->gd once the disk is properly connected
++ up. */
++int xlvbd_add(blkif_sector_t capacity, int device,
++ u16 vdisk_info, u16 sector_size, struct blkfront_info *info);
++void xlvbd_del(struct blkfront_info *info);
++int xlvbd_barrier(struct blkfront_info *info);
++
++#ifdef CONFIG_SYSFS
++int xlvbd_sysfs_addif(struct blkfront_info *info);
++void xlvbd_sysfs_delif(struct blkfront_info *info);
++#else
++static inline int xlvbd_sysfs_addif(struct blkfront_info *info)
++{
++ return 0;
++}
++
++static inline void xlvbd_sysfs_delif(struct blkfront_info *info)
++{
++ ;
++}
++#endif
++
++#endif /* __XEN_DRIVERS_BLOCK_H__ */
+Index: head-2008-11-25/drivers/xen/blkfront/vbd.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blkfront/vbd.c 2008-08-07 12:44:36.000000000 +0200
+@@ -0,0 +1,460 @@
++/******************************************************************************
++ * vbd.c
++ *
++ * XenLinux virtual block-device driver (xvd).
++ *
++ * Copyright (c) 2003-2004, Keir Fraser & Steve Hand
++ * Modifications by Mark A. Williamson are (c) Intel Research Cambridge
++ * Copyright (c) 2004-2005, Christian Limpach
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include "block.h"
++#include <linux/blkdev.h>
++#include <linux/list.h>
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++#define BLKIF_MAJOR(dev) ((dev)>>8)
++#define BLKIF_MINOR(dev) ((dev) & 0xff)
++
++#define EXT_SHIFT 28
++#define EXTENDED (1<<EXT_SHIFT)
++#define VDEV_IS_EXTENDED(dev) ((dev)&(EXTENDED))
++#define BLKIF_MINOR_EXT(dev) ((dev)&(~EXTENDED))
++
++/*
++ * For convenience we distinguish between ide, scsi and 'other' (i.e.,
++ * potentially combinations of the two) in the naming scheme and in a few other
++ * places.
++ */
++
++#define NUM_IDE_MAJORS 10
++#define NUM_SCSI_MAJORS 17
++#define NUM_VBD_MAJORS 2
++
++static struct xlbd_type_info xlbd_ide_type = {
++ .partn_shift = 6,
++ .disks_per_major = 2,
++ .devname = "ide",
++ .diskname = "hd",
++};
++
++static struct xlbd_type_info xlbd_scsi_type = {
++ .partn_shift = 4,
++ .disks_per_major = 16,
++ .devname = "sd",
++ .diskname = "sd",
++};
++
++static struct xlbd_type_info xlbd_vbd_type = {
++ .partn_shift = 4,
++ .disks_per_major = 16,
++ .devname = "xvd",
++ .diskname = "xvd",
++};
++
++static struct xlbd_type_info xlbd_vbd_type_ext = {
++ .partn_shift = 8,
++ .disks_per_major = 256,
++ .devname = "xvd",
++ .diskname = "xvd",
++};
++
++static struct xlbd_major_info *major_info[NUM_IDE_MAJORS + NUM_SCSI_MAJORS +
++ NUM_VBD_MAJORS];
++
++#define XLBD_MAJOR_IDE_START 0
++#define XLBD_MAJOR_SCSI_START (NUM_IDE_MAJORS)
++#define XLBD_MAJOR_VBD_START (NUM_IDE_MAJORS + NUM_SCSI_MAJORS)
++
++#define XLBD_MAJOR_IDE_RANGE XLBD_MAJOR_IDE_START ... XLBD_MAJOR_SCSI_START - 1
++#define XLBD_MAJOR_SCSI_RANGE XLBD_MAJOR_SCSI_START ... XLBD_MAJOR_VBD_START - 1
++#define XLBD_MAJOR_VBD_RANGE XLBD_MAJOR_VBD_START ... XLBD_MAJOR_VBD_START + NUM_VBD_MAJORS - 1
++
++static struct block_device_operations xlvbd_block_fops =
++{
++ .owner = THIS_MODULE,
++ .open = blkif_open,
++ .release = blkif_release,
++ .ioctl = blkif_ioctl,
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
++ .getgeo = blkif_getgeo
++#endif
++};
++
++DEFINE_SPINLOCK(blkif_io_lock);
++
++static struct xlbd_major_info *
++xlbd_alloc_major_info(int major, int minor, int index)
++{
++ struct xlbd_major_info *ptr;
++ int do_register;
++
++ ptr = kzalloc(sizeof(struct xlbd_major_info), GFP_KERNEL);
++ if (ptr == NULL)
++ return NULL;
++
++ ptr->major = major;
++ do_register = 1;
++
++ switch (index) {
++ case XLBD_MAJOR_IDE_RANGE:
++ ptr->type = &xlbd_ide_type;
++ ptr->index = index - XLBD_MAJOR_IDE_START;
++ break;
++ case XLBD_MAJOR_SCSI_RANGE:
++ ptr->type = &xlbd_scsi_type;
++ ptr->index = index - XLBD_MAJOR_SCSI_START;
++ break;
++ case XLBD_MAJOR_VBD_RANGE:
++ ptr->index = 0;
++ if ((index - XLBD_MAJOR_VBD_START) == 0)
++ ptr->type = &xlbd_vbd_type;
++ else
++ ptr->type = &xlbd_vbd_type_ext;
++
++ /*
++ * if someone already registered block major 202,
++ * don't try to register it again
++ */
++ if (major_info[XLBD_MAJOR_VBD_START] != NULL)
++ do_register = 0;
++ break;
++ }
++
++ if (do_register) {
++ if (register_blkdev(ptr->major, ptr->type->devname)) {
++ kfree(ptr);
++ return NULL;
++ }
++
++ printk("xen-vbd: registered block device major %i\n", ptr->major);
++ }
++
++ major_info[index] = ptr;
++ return ptr;
++}
++
++static struct xlbd_major_info *
++xlbd_get_major_info(int major, int minor, int vdevice)
++{
++ struct xlbd_major_info *mi;
++ int index;
++
++ switch (major) {
++ case IDE0_MAJOR: index = 0; break;
++ case IDE1_MAJOR: index = 1; break;
++ case IDE2_MAJOR: index = 2; break;
++ case IDE3_MAJOR: index = 3; break;
++ case IDE4_MAJOR: index = 4; break;
++ case IDE5_MAJOR: index = 5; break;
++ case IDE6_MAJOR: index = 6; break;
++ case IDE7_MAJOR: index = 7; break;
++ case IDE8_MAJOR: index = 8; break;
++ case IDE9_MAJOR: index = 9; break;
++ case SCSI_DISK0_MAJOR: index = 10; break;
++ case SCSI_DISK1_MAJOR ... SCSI_DISK7_MAJOR:
++ index = 11 + major - SCSI_DISK1_MAJOR;
++ break;
++ case SCSI_DISK8_MAJOR ... SCSI_DISK15_MAJOR:
++ index = 18 + major - SCSI_DISK8_MAJOR;
++ break;
++ case SCSI_CDROM_MAJOR: index = 26; break;
++ default:
++ if (!VDEV_IS_EXTENDED(vdevice))
++ index = 27;
++ else
++ index = 28;
++ break;
++ }
++
++ mi = ((major_info[index] != NULL) ? major_info[index] :
++ xlbd_alloc_major_info(major, minor, index));
++ if (mi)
++ mi->usage++;
++ return mi;
++}
++
++static void
++xlbd_put_major_info(struct xlbd_major_info *mi)
++{
++ mi->usage--;
++ /* XXX: release major if 0 */
++}
++
++static int
++xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
++{
++ request_queue_t *rq;
++
++ rq = blk_init_queue(do_blkif_request, &blkif_io_lock);
++ if (rq == NULL)
++ return -1;
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10)
++ elevator_init(rq, "noop");
++#else
++ elevator_init(rq, &elevator_noop);
++#endif
++
++ /* Hard sector size and max sectors impersonate the equiv. hardware. */
++ blk_queue_hardsect_size(rq, sector_size);
++ blk_queue_max_sectors(rq, 512);
++
++ /* Each segment in a request is up to an aligned page in size. */
++ blk_queue_segment_boundary(rq, PAGE_SIZE - 1);
++ blk_queue_max_segment_size(rq, PAGE_SIZE);
++
++ /* Ensure a merged request will fit in a single I/O ring slot. */
++ blk_queue_max_phys_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST);
++ blk_queue_max_hw_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST);
++
++ /* Make sure buffer addresses are sector-aligned. */
++ blk_queue_dma_alignment(rq, 511);
++
++ /* Make sure we don't use bounce buffers. */
++ blk_queue_bounce_limit(rq, BLK_BOUNCE_ANY);
++
++ gd->queue = rq;
++
++ return 0;
++}
++
++static int
++xlvbd_alloc_gendisk(int major, int minor, blkif_sector_t capacity, int vdevice,
++ u16 vdisk_info, u16 sector_size,
++ struct blkfront_info *info)
++{
++ struct gendisk *gd;
++ struct xlbd_major_info *mi;
++ int nr_minors = 1;
++ int err = -ENODEV;
++ unsigned int offset;
++
++ BUG_ON(info->gd != NULL);
++ BUG_ON(info->mi != NULL);
++ BUG_ON(info->rq != NULL);
++
++ mi = xlbd_get_major_info(major, minor, vdevice);
++ if (mi == NULL)
++ goto out;
++ info->mi = mi;
++
++ if ((minor & ((1 << mi->type->partn_shift) - 1)) == 0)
++ nr_minors = 1 << mi->type->partn_shift;
++
++ gd = alloc_disk(nr_minors);
++ if (gd == NULL)
++ goto out;
++
++ offset = mi->index * mi->type->disks_per_major +
++ (minor >> mi->type->partn_shift);
++ if (nr_minors > 1) {
++ if (offset < 26) {
++ sprintf(gd->disk_name, "%s%c",
++ mi->type->diskname, 'a' + offset );
++ }
++ else {
++ sprintf(gd->disk_name, "%s%c%c",
++ mi->type->diskname,
++ 'a' + ((offset/26)-1), 'a' + (offset%26) );
++ }
++ }
++ else {
++ if (offset < 26) {
++ sprintf(gd->disk_name, "%s%c%d",
++ mi->type->diskname,
++ 'a' + offset,
++ minor & ((1 << mi->type->partn_shift) - 1));
++ }
++ else {
++ sprintf(gd->disk_name, "%s%c%c%d",
++ mi->type->diskname,
++ 'a' + ((offset/26)-1), 'a' + (offset%26),
++ minor & ((1 << mi->type->partn_shift) - 1));
++ }
++ }
++
++ gd->major = mi->major;
++ gd->first_minor = minor;
++ gd->fops = &xlvbd_block_fops;
++ gd->private_data = info;
++ gd->driverfs_dev = &(info->xbdev->dev);
++ set_capacity(gd, capacity);
++
++ if (xlvbd_init_blk_queue(gd, sector_size)) {
++ del_gendisk(gd);
++ goto out;
++ }
++
++ info->rq = gd->queue;
++ info->gd = gd;
++
++ if (info->feature_barrier)
++ xlvbd_barrier(info);
++
++ if (vdisk_info & VDISK_READONLY)
++ set_disk_ro(gd, 1);
++
++ if (vdisk_info & VDISK_REMOVABLE)
++ gd->flags |= GENHD_FL_REMOVABLE;
++
++ if (vdisk_info & VDISK_CDROM)
++ gd->flags |= GENHD_FL_CD;
++
++ return 0;
++
++ out:
++ if (mi)
++ xlbd_put_major_info(mi);
++ info->mi = NULL;
++ return err;
++}
++
++int
++xlvbd_add(blkif_sector_t capacity, int vdevice, u16 vdisk_info,
++ u16 sector_size, struct blkfront_info *info)
++{
++ struct block_device *bd;
++ int err = 0;
++ int major, minor;
++
++ if ((vdevice>>EXT_SHIFT) > 1) {
++ /* this is above the extended range; something is wrong */
++ printk(KERN_WARNING "blkfront: vdevice 0x%x is above the extended range; ignoring\n", vdevice);
++ return -ENODEV;
++ }
++
++ if (!VDEV_IS_EXTENDED(vdevice)) {
++ major = BLKIF_MAJOR(vdevice);
++ minor = BLKIF_MINOR(vdevice);
++ }
++ else {
++ major = 202;
++ minor = BLKIF_MINOR_EXT(vdevice);
++ }
++
++ info->dev = MKDEV(major, minor);
++ bd = bdget(info->dev);
++ if (bd == NULL)
++ return -ENODEV;
++
++ err = xlvbd_alloc_gendisk(major, minor, capacity, vdevice, vdisk_info,
++ sector_size, info);
++
++ bdput(bd);
++ return err;
++}
++
++void
++xlvbd_del(struct blkfront_info *info)
++{
++ if (info->mi == NULL)
++ return;
++
++ BUG_ON(info->gd == NULL);
++ del_gendisk(info->gd);
++ put_disk(info->gd);
++ info->gd = NULL;
++
++ xlbd_put_major_info(info->mi);
++ info->mi = NULL;
++
++ BUG_ON(info->rq == NULL);
++ blk_cleanup_queue(info->rq);
++ info->rq = NULL;
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
++int
++xlvbd_barrier(struct blkfront_info *info)
++{
++ int err;
++
++ err = blk_queue_ordered(info->rq,
++ info->feature_barrier ? QUEUE_ORDERED_DRAIN : QUEUE_ORDERED_NONE, NULL);
++ if (err)
++ return err;
++ printk(KERN_INFO "blkfront: %s: barriers %s\n",
++ info->gd->disk_name, info->feature_barrier ? "enabled" : "disabled");
++ return 0;
++}
++#else
++int
++xlvbd_barrier(struct blkfront_info *info)
++{
++ printk(KERN_INFO "blkfront: %s: barriers disabled\n", info->gd->disk_name);
++ return -ENOSYS;
++}
++#endif
++
++#ifdef CONFIG_SYSFS
++static ssize_t show_media(struct device *dev,
++ struct device_attribute *attr, char *buf)
++{
++ struct xenbus_device *xendev = to_xenbus_device(dev);
++ struct blkfront_info *info = xendev->dev.driver_data;
++
++ if (info->gd->flags & GENHD_FL_CD)
++ return sprintf(buf, "cdrom\n");
++ return sprintf(buf, "disk\n");
++}
++
++static struct device_attribute xlvbd_attrs[] = {
++ __ATTR(media, S_IRUGO, show_media, NULL),
++};
++
++int xlvbd_sysfs_addif(struct blkfront_info *info)
++{
++ int i;
++ int error = 0;
++
++ for (i = 0; i < ARRAY_SIZE(xlvbd_attrs); i++) {
++ error = device_create_file(info->gd->driverfs_dev,
++ &xlvbd_attrs[i]);
++ if (error)
++ goto fail;
++ }
++ return 0;
++
++fail:
++ while (--i >= 0)
++ device_remove_file(info->gd->driverfs_dev, &xlvbd_attrs[i]);
++ return error;
++}
++
++void xlvbd_sysfs_delif(struct blkfront_info *info)
++{
++ int i;
++
++ for (i = 0; i < ARRAY_SIZE(xlvbd_attrs); i++)
++ device_remove_file(info->gd->driverfs_dev, &xlvbd_attrs[i]);
++}
++
++#endif /* CONFIG_SYSFS */
+Index: head-2008-11-25/drivers/xen/blktap/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blktap/Makefile 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,5 @@
++LINUXINCLUDE += -I../xen/include/public/io
++
++obj-$(CONFIG_XEN_BLKDEV_TAP) := xenblktap.o
++
++xenblktap-y := xenbus.o interface.o blktap.o
+Index: head-2008-11-25/drivers/xen/blktap/blktap.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blktap/blktap.c 2008-11-10 11:44:21.000000000 +0100
+@@ -0,0 +1,1704 @@
++/******************************************************************************
++ * drivers/xen/blktap/blktap.c
++ *
++ * Back-end driver for user level virtual block devices. This portion of the
++ * driver exports a 'unified' block-device interface that can be accessed
++ * by any operating system that implements a compatible front end. Requests
++ * are remapped to a user-space memory region.
++ *
++ * Based on the blkback driver code.
++ *
++ * Copyright (c) 2004-2005, Andrew Warfield and Julian Chesterfield
++ *
++ * Clean ups and fix ups:
++ * Copyright (c) 2006, Steven Rostedt - Red Hat, Inc.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/spinlock.h>
++#include <linux/kthread.h>
++#include <linux/list.h>
++#include <asm/hypervisor.h>
++#include "common.h"
++#include <xen/balloon.h>
++#include <xen/driver_util.h>
++#include <linux/kernel.h>
++#include <linux/fs.h>
++#include <linux/mm.h>
++#include <linux/errno.h>
++#include <linux/major.h>
++#include <linux/gfp.h>
++#include <linux/poll.h>
++#include <linux/delay.h>
++#include <asm/tlbflush.h>
++
++#define MAX_TAP_DEV 256 /*the maximum number of tapdisk ring devices */
++#define MAX_DEV_NAME 100 /*the max tapdisk ring device name e.g. blktap0 */
++
++/*
++ * The maximum number of requests that can be outstanding at any time
++ * is determined by
++ *
++ * [mmap_alloc * MAX_PENDING_REQS * BLKIF_MAX_SEGMENTS_PER_REQUEST]
++ *
++ * where mmap_alloc < MAX_DYNAMIC_MEM.
++ *
++ * TODO:
++ * mmap_alloc is initialised to 2 and should be adjustable on the fly via
++ * sysfs.
++ */
++#define BLK_RING_SIZE __RING_SIZE((blkif_sring_t *)0, PAGE_SIZE)
++#define MAX_DYNAMIC_MEM BLK_RING_SIZE
++#define MAX_PENDING_REQS BLK_RING_SIZE
++#define MMAP_PAGES (MAX_PENDING_REQS * BLKIF_MAX_SEGMENTS_PER_REQUEST)
++#define MMAP_VADDR(_start, _req,_seg) \
++ (_start + \
++ ((_req) * BLKIF_MAX_SEGMENTS_PER_REQUEST * PAGE_SIZE) + \
++ ((_seg) * PAGE_SIZE))
++static int blkif_reqs = MAX_PENDING_REQS;
++static int mmap_pages = MMAP_PAGES;
++
++#define RING_PAGES 1 /* BLKTAP - immediately before the mmap area, we
++ * have a bunch of pages reserved for shared
++ * memory rings.
++ */
++
++/*Data struct handed back to userspace for tapdisk device to VBD mapping*/
++typedef struct domid_translate {
++ unsigned short domid;
++ unsigned short busid;
++} domid_translate_t ;
++
++typedef struct domid_translate_ext {
++ unsigned short domid;
++ u32 busid;
++} domid_translate_ext_t ;
++
++/*Data struct associated with each of the tapdisk devices*/
++typedef struct tap_blkif {
++ struct vm_area_struct *vma; /*Shared memory area */
++ unsigned long rings_vstart; /*Kernel memory mapping */
++ unsigned long user_vstart; /*User memory mapping */
++ unsigned long dev_inuse; /*One process opens device at a time. */
++ unsigned long dev_pending; /*In process of being opened */
++ unsigned long ring_ok; /*make this ring->state */
++ blkif_front_ring_t ufe_ring; /*Rings up to user space. */
++ wait_queue_head_t wait; /*for poll */
++ unsigned long mode; /*current switching mode */
++ int minor; /*Minor number for tapdisk device */
++ pid_t pid; /*tapdisk process id */
++ enum { RUNNING, CLEANSHUTDOWN } status; /*Detect a clean userspace
++ shutdown */
++ unsigned long *idx_map; /*Record the user ring id to kern
++ [req id, idx] tuple */
++ blkif_t *blkif; /*Associate blkif with tapdev */
++ struct domid_translate_ext trans; /*Translation from domid to bus. */
++} tap_blkif_t;
++
++static struct tap_blkif *tapfds[MAX_TAP_DEV];
++static int blktap_next_minor;
++
++module_param(blkif_reqs, int, 0);
++/* Run-time switchable: /sys/module/blktap/parameters/ */
++static unsigned int log_stats = 0;
++static unsigned int debug_lvl = 0;
++module_param(log_stats, int, 0644);
++module_param(debug_lvl, int, 0644);
++
++/*
++ * Each outstanding request that we've passed to the lower device layers has a
++ * 'pending_req' allocated to it. Each buffer_head that completes decrements
++ * the pendcnt towards zero. When it hits zero, the specified domain has a
++ * response queued for it, with the saved 'id' passed back.
++ */
++typedef struct {
++ blkif_t *blkif;
++ u64 id;
++ unsigned short mem_idx;
++ int nr_pages;
++ atomic_t pendcnt;
++ unsigned short operation;
++ int status;
++ struct list_head free_list;
++ int inuse;
++} pending_req_t;
++
++static pending_req_t *pending_reqs[MAX_PENDING_REQS];
++static struct list_head pending_free;
++static DEFINE_SPINLOCK(pending_free_lock);
++static DECLARE_WAIT_QUEUE_HEAD (pending_free_wq);
++static int alloc_pending_reqs;
++
++typedef unsigned int PEND_RING_IDX;
++
++static inline int MASK_PEND_IDX(int i) {
++ return (i & (MAX_PENDING_REQS-1));
++}
++
++static inline unsigned int RTN_PEND_IDX(pending_req_t *req, int idx) {
++ return (req - pending_reqs[idx]);
++}
++
++#define NR_PENDING_REQS (MAX_PENDING_REQS - pending_prod + pending_cons)
++
++#define BLKBACK_INVALID_HANDLE (~0)
++
++static struct page **foreign_pages[MAX_DYNAMIC_MEM];
++static inline unsigned long idx_to_kaddr(
++ unsigned int mmap_idx, unsigned int req_idx, unsigned int sg_idx)
++{
++ unsigned int arr_idx = req_idx*BLKIF_MAX_SEGMENTS_PER_REQUEST + sg_idx;
++ unsigned long pfn = page_to_pfn(foreign_pages[mmap_idx][arr_idx]);
++ return (unsigned long)pfn_to_kaddr(pfn);
++}
++
++static unsigned short mmap_alloc = 0;
++static unsigned short mmap_lock = 0;
++static unsigned short mmap_inuse = 0;
++
++/******************************************************************
++ * GRANT HANDLES
++ */
++
++/* When using grant tables to map a frame for device access then the
++ * handle returned must be used to unmap the frame. This is needed to
++ * drop the ref count on the frame.
++ */
++struct grant_handle_pair
++{
++ grant_handle_t kernel;
++ grant_handle_t user;
++};
++#define INVALID_GRANT_HANDLE 0xFFFF
++
++static struct grant_handle_pair
++ pending_grant_handles[MAX_DYNAMIC_MEM][MMAP_PAGES];
++#define pending_handle(_id, _idx, _i) \
++ (pending_grant_handles[_id][((_idx) * BLKIF_MAX_SEGMENTS_PER_REQUEST) \
++ + (_i)])
++
++
++static int blktap_read_ufe_ring(tap_blkif_t *info); /*local prototypes*/
++
++#define BLKTAP_MINOR 0 /*/dev/xen/blktap has a dynamic major */
++#define BLKTAP_DEV_DIR "/dev/xen"
++
++static int blktap_major;
++
++/* blktap IOCTLs: */
++#define BLKTAP_IOCTL_KICK_FE 1
++#define BLKTAP_IOCTL_KICK_BE 2 /* currently unused */
++#define BLKTAP_IOCTL_SETMODE 3
++#define BLKTAP_IOCTL_SENDPID 4
++#define BLKTAP_IOCTL_NEWINTF 5
++#define BLKTAP_IOCTL_MINOR 6
++#define BLKTAP_IOCTL_MAJOR 7
++#define BLKTAP_QUERY_ALLOC_REQS 8
++#define BLKTAP_IOCTL_FREEINTF 9
++#define BLKTAP_IOCTL_NEWINTF_EXT 50
++#define BLKTAP_IOCTL_PRINT_IDXS 100
++
++/* blktap switching modes: (Set with BLKTAP_IOCTL_SETMODE) */
++#define BLKTAP_MODE_PASSTHROUGH 0x00000000 /* default */
++#define BLKTAP_MODE_INTERCEPT_FE 0x00000001
++#define BLKTAP_MODE_INTERCEPT_BE 0x00000002 /* unimp. */
++
++#define BLKTAP_MODE_INTERPOSE \
++ (BLKTAP_MODE_INTERCEPT_FE | BLKTAP_MODE_INTERCEPT_BE)
++
++
++static inline int BLKTAP_MODE_VALID(unsigned long arg)
++{
++ return ((arg == BLKTAP_MODE_PASSTHROUGH ) ||
++ (arg == BLKTAP_MODE_INTERCEPT_FE) ||
++ (arg == BLKTAP_MODE_INTERPOSE ));
++}
++
++/* Requests passing through the tap to userspace are re-assigned an ID.
++ * We must record a mapping between the BE [IDX,ID] tuple and the userspace
++ * ring ID.
++ */
++
++static inline unsigned long MAKE_ID(domid_t fe_dom, PEND_RING_IDX idx)
++{
++ return ((fe_dom << 16) | MASK_PEND_IDX(idx));
++}
++
++extern inline PEND_RING_IDX ID_TO_IDX(unsigned long id)
++{
++ return (PEND_RING_IDX)(id & 0x0000ffff);
++}
++
++extern inline int ID_TO_MIDX(unsigned long id)
++{
++ return (int)(id >> 16);
++}
++
++#define INVALID_REQ 0xdead0000
++
++/*TODO: Convert to a free list*/
++static inline int GET_NEXT_REQ(unsigned long *idx_map)
++{
++ int i;
++ for (i = 0; i < MAX_PENDING_REQS; i++)
++ if (idx_map[i] == INVALID_REQ)
++ return i;
++
++ return INVALID_REQ;
++}
++
++static inline int OFFSET_TO_USR_IDX(int offset)
++{
++ return offset / BLKIF_MAX_SEGMENTS_PER_REQUEST;
++}
++
++static inline int OFFSET_TO_SEG(int offset)
++{
++ return offset % BLKIF_MAX_SEGMENTS_PER_REQUEST;
++}
++
++
++#define BLKTAP_INVALID_HANDLE(_g) \
++ (((_g->kernel) == INVALID_GRANT_HANDLE) && \
++ ((_g->user) == INVALID_GRANT_HANDLE))
++
++#define BLKTAP_INVALIDATE_HANDLE(_g) do { \
++ (_g)->kernel = INVALID_GRANT_HANDLE; (_g)->user = INVALID_GRANT_HANDLE; \
++ } while(0)
++
++
++/******************************************************************
++ * BLKTAP VM OPS
++ */
++
++static struct page *blktap_nopage(struct vm_area_struct *vma,
++ unsigned long address,
++ int *type)
++{
++ /*
++ * if the page has not been mapped in by the driver then return
++ * NOPAGE_SIGBUS to the domain.
++ */
++
++ return NOPAGE_SIGBUS;
++}
++
++static pte_t blktap_clear_pte(struct vm_area_struct *vma,
++ unsigned long uvaddr,
++ pte_t *ptep, int is_fullmm)
++{
++ pte_t copy;
++ tap_blkif_t *info;
++ int offset, seg, usr_idx, pending_idx, mmap_idx;
++ unsigned long uvstart = vma->vm_start + (RING_PAGES << PAGE_SHIFT);
++ unsigned long kvaddr;
++ struct page **map;
++ struct page *pg;
++ struct grant_handle_pair *khandle;
++ struct gnttab_unmap_grant_ref unmap[2];
++ int count = 0;
++
++ /*
++ * If the address is before the start of the grant mapped region or
++ * if vm_file is NULL (meaning mmap failed and we have nothing to do)
++ */
++ if (uvaddr < uvstart || vma->vm_file == NULL)
++ return ptep_get_and_clear_full(vma->vm_mm, uvaddr,
++ ptep, is_fullmm);
++
++ info = vma->vm_file->private_data;
++ map = vma->vm_private_data;
++
++ /* TODO Should these be changed to if statements? */
++ BUG_ON(!info);
++ BUG_ON(!info->idx_map);
++ BUG_ON(!map);
++
++ offset = (int) ((uvaddr - uvstart) >> PAGE_SHIFT);
++ usr_idx = OFFSET_TO_USR_IDX(offset);
++ seg = OFFSET_TO_SEG(offset);
++
++ pending_idx = MASK_PEND_IDX(ID_TO_IDX(info->idx_map[usr_idx]));
++ mmap_idx = ID_TO_MIDX(info->idx_map[usr_idx]);
++
++ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, seg);
++ pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
++ ClearPageReserved(pg);
++ map[offset + RING_PAGES] = NULL;
++
++ khandle = &pending_handle(mmap_idx, pending_idx, seg);
++
++ if (khandle->kernel != INVALID_GRANT_HANDLE) {
++ gnttab_set_unmap_op(&unmap[count], kvaddr,
++ GNTMAP_host_map, khandle->kernel);
++ count++;
++
++ set_phys_to_machine(__pa(kvaddr) >> PAGE_SHIFT,
++ INVALID_P2M_ENTRY);
++ }
++
++ if (khandle->user != INVALID_GRANT_HANDLE) {
++ BUG_ON(xen_feature(XENFEAT_auto_translated_physmap));
++
++ copy = *ptep;
++ gnttab_set_unmap_op(&unmap[count], virt_to_machine(ptep),
++ GNTMAP_host_map
++ | GNTMAP_application_map
++ | GNTMAP_contains_pte,
++ khandle->user);
++ count++;
++ } else {
++ BUG_ON(!xen_feature(XENFEAT_auto_translated_physmap));
++
++ /* USING SHADOW PAGE TABLES. */
++ copy = ptep_get_and_clear_full(vma->vm_mm, uvaddr, ptep,
++ is_fullmm);
++ }
++
++ if (count) {
++ BLKTAP_INVALIDATE_HANDLE(khandle);
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref,
++ unmap, count))
++ BUG();
++ }
++
++ return copy;
++}
++
++struct vm_operations_struct blktap_vm_ops = {
++ nopage: blktap_nopage,
++ zap_pte: blktap_clear_pte,
++};
++
++/******************************************************************
++ * BLKTAP FILE OPS
++ */
++
++/*Function Declarations*/
++static tap_blkif_t *get_next_free_dev(void);
++static int blktap_open(struct inode *inode, struct file *filp);
++static int blktap_release(struct inode *inode, struct file *filp);
++static int blktap_mmap(struct file *filp, struct vm_area_struct *vma);
++static int blktap_ioctl(struct inode *inode, struct file *filp,
++ unsigned int cmd, unsigned long arg);
++static unsigned int blktap_poll(struct file *file, poll_table *wait);
++
++static const struct file_operations blktap_fops = {
++ .owner = THIS_MODULE,
++ .poll = blktap_poll,
++ .ioctl = blktap_ioctl,
++ .open = blktap_open,
++ .release = blktap_release,
++ .mmap = blktap_mmap,
++};
++
++
++static tap_blkif_t *get_next_free_dev(void)
++{
++ struct class *class;
++ tap_blkif_t *info;
++ int minor;
++
++ /*
++ * This is called only from the ioctl, which
++ * means we should always have interrupts enabled.
++ */
++ BUG_ON(irqs_disabled());
++
++ spin_lock_irq(&pending_free_lock);
++
++ /* tapfds[0] is always NULL */
++
++ for (minor = 1; minor < blktap_next_minor; minor++) {
++ info = tapfds[minor];
++ /* we could have failed a previous attempt. */
++ if (!info ||
++ ((info->dev_inuse == 0) &&
++ (info->dev_pending == 0)) ) {
++ info->dev_pending = 1;
++ goto found;
++ }
++ }
++ info = NULL;
++ minor = -1;
++
++ /*
++ * We didn't find free device. If we can still allocate
++ * more, then we grab the next device minor that is
++ * available. This is done while we are still under
++ * the protection of the pending_free_lock.
++ */
++ if (blktap_next_minor < MAX_TAP_DEV)
++ minor = blktap_next_minor++;
++found:
++ spin_unlock_irq(&pending_free_lock);
++
++ if (!info && minor > 0) {
++ info = kzalloc(sizeof(*info), GFP_KERNEL);
++ if (unlikely(!info)) {
++ /*
++ * If we failed here, try to put back
++ * the next minor number. But if one
++ * was just taken, then we just lose this
++ * minor. We can try to allocate this
++ * minor again later.
++ */
++ spin_lock_irq(&pending_free_lock);
++ if (blktap_next_minor == minor+1)
++ blktap_next_minor--;
++ spin_unlock_irq(&pending_free_lock);
++ goto out;
++ }
++
++ info->minor = minor;
++ /*
++ * Make sure that we have a minor before others can
++ * see us.
++ */
++ wmb();
++ tapfds[minor] = info;
++
++ if ((class = get_xen_class()) != NULL)
++ class_device_create(class, NULL,
++ MKDEV(blktap_major, minor), NULL,
++ "blktap%d", minor);
++ }
++
++out:
++ return info;
++}
++
++int dom_to_devid(domid_t domid, int xenbus_id, blkif_t *blkif)
++{
++ tap_blkif_t *info;
++ int i;
++
++ for (i = 1; i < blktap_next_minor; i++) {
++ info = tapfds[i];
++ if ( info &&
++ (info->trans.domid == domid) &&
++ (info->trans.busid == xenbus_id) ) {
++ info->blkif = blkif;
++ info->status = RUNNING;
++ return i;
++ }
++ }
++ return -1;
++}
++
++void signal_tapdisk(int idx)
++{
++ tap_blkif_t *info;
++ struct task_struct *ptask;
++
++ /*
++ * if the userland tools set things up wrong, this could be negative;
++ * just don't try to signal in this case
++ */
++ if (idx < 0)
++ return;
++
++ info = tapfds[idx];
++ if ((idx < 0) || (idx > MAX_TAP_DEV) || !info)
++ return;
++
++ if (info->pid > 0) {
++ ptask = find_task_by_pid(info->pid);
++ if (ptask)
++ info->status = CLEANSHUTDOWN;
++ }
++ info->blkif = NULL;
++
++ return;
++}
++
++static int blktap_open(struct inode *inode, struct file *filp)
++{
++ blkif_sring_t *sring;
++ int idx = iminor(inode) - BLKTAP_MINOR;
++ tap_blkif_t *info;
++ int i;
++
++ /* ctrl device, treat differently */
++ if (!idx)
++ return 0;
++
++ info = tapfds[idx];
++
++ if ((idx < 0) || (idx > MAX_TAP_DEV) || !info) {
++ WPRINTK("Unable to open device /dev/xen/blktap%d\n",
++ idx);
++ return -ENODEV;
++ }
++
++ DPRINTK("Opening device /dev/xen/blktap%d\n",idx);
++
++ /*Only one process can access device at a time*/
++ if (test_and_set_bit(0, &info->dev_inuse))
++ return -EBUSY;
++
++ info->dev_pending = 0;
++
++ /* Allocate the fe ring. */
++ sring = (blkif_sring_t *)get_zeroed_page(GFP_KERNEL);
++ if (sring == NULL)
++ goto fail_nomem;
++
++ SetPageReserved(virt_to_page(sring));
++
++ SHARED_RING_INIT(sring);
++ FRONT_RING_INIT(&info->ufe_ring, sring, PAGE_SIZE);
++
++ filp->private_data = info;
++ info->vma = NULL;
++
++ info->idx_map = kmalloc(sizeof(unsigned long) * MAX_PENDING_REQS,
++ GFP_KERNEL);
++
++ if (info->idx_map == NULL)
++ goto fail_nomem;
++
++ if (idx > 0) {
++ init_waitqueue_head(&info->wait);
++ for (i = 0; i < MAX_PENDING_REQS; i++)
++ info->idx_map[i] = INVALID_REQ;
++ }
++
++ DPRINTK("Tap open: device /dev/xen/blktap%d\n",idx);
++ return 0;
++
++ fail_nomem:
++ return -ENOMEM;
++}
++
++static int blktap_release(struct inode *inode, struct file *filp)
++{
++ tap_blkif_t *info = filp->private_data;
++
++ /* check for control device */
++ if (!info)
++ return 0;
++
++ info->dev_inuse = 0;
++ DPRINTK("Freeing device [/dev/xen/blktap%d]\n",info->minor);
++
++ /* Free the ring page. */
++ ClearPageReserved(virt_to_page(info->ufe_ring.sring));
++ free_page((unsigned long) info->ufe_ring.sring);
++
++ /* Clear any active mappings and free foreign map table */
++ if (info->vma) {
++ struct mm_struct *mm = info->vma->vm_mm;
++
++ down_write(&mm->mmap_sem);
++ zap_page_range(
++ info->vma, info->vma->vm_start,
++ info->vma->vm_end - info->vma->vm_start, NULL);
++ up_write(&mm->mmap_sem);
++
++ kfree(info->vma->vm_private_data);
++
++ info->vma = NULL;
++ }
++
++ if (info->idx_map) {
++ kfree(info->idx_map);
++ info->idx_map = NULL;
++ }
++
++ if ( (info->status != CLEANSHUTDOWN) && (info->blkif != NULL) ) {
++ if (info->blkif->xenblkd != NULL) {
++ kthread_stop(info->blkif->xenblkd);
++ info->blkif->xenblkd = NULL;
++ }
++ info->status = CLEANSHUTDOWN;
++ }
++
++ return 0;
++}
++
++
++/* Note on mmap:
++ * We need to map pages to user space in a way that will allow the block
++ * subsystem set up direct IO to them. This couldn't be done before, because
++ * there isn't really a sane way to translate a user virtual address down to a
++ * physical address when the page belongs to another domain.
++ *
++ * My first approach was to map the page in to kernel memory, add an entry
++ * for it in the physical frame list (using alloc_lomem_region as in blkback)
++ * and then attempt to map that page up to user space. This is disallowed
++ * by xen though, which realizes that we don't really own the machine frame
++ * underlying the physical page.
++ *
++ * The new approach is to provide explicit support for this in xen linux.
++ * The VMA now has a flag, VM_FOREIGN, to indicate that it contains pages
++ * mapped from other vms. vma->vm_private_data is set up as a mapping
++ * from pages to actual page structs. There is a new clause in get_user_pages
++ * that does the right thing for this sort of mapping.
++ */
++static int blktap_mmap(struct file *filp, struct vm_area_struct *vma)
++{
++ int size;
++ struct page **map;
++ int i;
++ tap_blkif_t *info = filp->private_data;
++ int ret;
++
++ if (info == NULL) {
++ WPRINTK("blktap: mmap, retrieving idx failed\n");
++ return -ENOMEM;
++ }
++
++ vma->vm_flags |= VM_RESERVED;
++ vma->vm_ops = &blktap_vm_ops;
++
++ size = vma->vm_end - vma->vm_start;
++ if (size != ((mmap_pages + RING_PAGES) << PAGE_SHIFT)) {
++ WPRINTK("you _must_ map exactly %d pages!\n",
++ mmap_pages + RING_PAGES);
++ return -EAGAIN;
++ }
++
++ size >>= PAGE_SHIFT;
++ info->rings_vstart = vma->vm_start;
++ info->user_vstart = info->rings_vstart + (RING_PAGES << PAGE_SHIFT);
++
++ /* Map the ring pages to the start of the region and reserve it. */
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ ret = vm_insert_page(vma, vma->vm_start,
++ virt_to_page(info->ufe_ring.sring));
++ else
++ ret = remap_pfn_range(vma, vma->vm_start,
++ __pa(info->ufe_ring.sring) >> PAGE_SHIFT,
++ PAGE_SIZE, vma->vm_page_prot);
++ if (ret) {
++ WPRINTK("Mapping user ring failed!\n");
++ goto fail;
++ }
++
++ /* Mark this VM as containing foreign pages, and set up mappings. */
++ map = kzalloc(((vma->vm_end - vma->vm_start) >> PAGE_SHIFT)
++ * sizeof(struct page *),
++ GFP_KERNEL);
++ if (map == NULL) {
++ WPRINTK("Couldn't alloc VM_FOREIGN map.\n");
++ goto fail;
++ }
++
++ for (i = 0; i < ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT); i++)
++ map[i] = NULL;
++
++ vma->vm_private_data = map;
++ vma->vm_flags |= VM_FOREIGN;
++ vma->vm_flags |= VM_DONTCOPY;
++
++#ifdef CONFIG_X86
++ vma->vm_mm->context.has_foreign_mappings = 1;
++#endif
++
++ info->vma = vma;
++ info->ring_ok = 1;
++ return 0;
++ fail:
++ /* Clear any active mappings. */
++ zap_page_range(vma, vma->vm_start,
++ vma->vm_end - vma->vm_start, NULL);
++
++ return -ENOMEM;
++}
++
++
++static int blktap_ioctl(struct inode *inode, struct file *filp,
++ unsigned int cmd, unsigned long arg)
++{
++ tap_blkif_t *info = filp->private_data;
++
++ switch(cmd) {
++ case BLKTAP_IOCTL_KICK_FE:
++ {
++ /* There are fe messages to process. */
++ return blktap_read_ufe_ring(info);
++ }
++ case BLKTAP_IOCTL_SETMODE:
++ {
++ if (info) {
++ if (BLKTAP_MODE_VALID(arg)) {
++ info->mode = arg;
++ /* XXX: may need to flush rings here. */
++ DPRINTK("blktap: set mode to %lx\n",
++ arg);
++ return 0;
++ }
++ }
++ return 0;
++ }
++ case BLKTAP_IOCTL_PRINT_IDXS:
++ {
++ if (info) {
++ printk("User Rings: \n-----------\n");
++ printk("UF: rsp_cons: %2d, req_prod_prv: %2d "
++ "| req_prod: %2d, rsp_prod: %2d\n",
++ info->ufe_ring.rsp_cons,
++ info->ufe_ring.req_prod_pvt,
++ info->ufe_ring.sring->req_prod,
++ info->ufe_ring.sring->rsp_prod);
++ }
++ return 0;
++ }
++ case BLKTAP_IOCTL_SENDPID:
++ {
++ if (info) {
++ info->pid = (pid_t)arg;
++ DPRINTK("blktap: pid received %d\n",
++ info->pid);
++ }
++ return 0;
++ }
++ case BLKTAP_IOCTL_NEWINTF:
++ {
++ uint64_t val = (uint64_t)arg;
++ domid_translate_t *tr = (domid_translate_t *)&val;
++
++ DPRINTK("NEWINTF Req for domid %d and bus id %d\n",
++ tr->domid, tr->busid);
++ info = get_next_free_dev();
++ if (!info) {
++ WPRINTK("Error initialising /dev/xen/blktap - "
++ "No more devices\n");
++ return -1;
++ }
++ info->trans.domid = tr->domid;
++ info->trans.busid = tr->busid;
++ return info->minor;
++ }
++ case BLKTAP_IOCTL_NEWINTF_EXT:
++ {
++ void __user *udata = (void __user *) arg;
++ domid_translate_ext_t tr;
++
++ if (copy_from_user(&tr, udata, sizeof(domid_translate_ext_t)))
++ return -EFAULT;
++
++ DPRINTK("NEWINTF_EXT Req for domid %d and bus id %d\n",
++ tr.domid, tr.busid);
++ info = get_next_free_dev();
++ if (!info) {
++ WPRINTK("Error initialising /dev/xen/blktap - "
++ "No more devices\n");
++ return -1;
++ }
++ info->trans.domid = tr.domid;
++ info->trans.busid = tr.busid;
++ return info->minor;
++ }
++ case BLKTAP_IOCTL_FREEINTF:
++ {
++ unsigned long dev = arg;
++ unsigned long flags;
++
++ info = tapfds[dev];
++
++ if ((dev > MAX_TAP_DEV) || !info)
++ return 0; /* should this be an error? */
++
++ spin_lock_irqsave(&pending_free_lock, flags);
++ if (info->dev_pending)
++ info->dev_pending = 0;
++ spin_unlock_irqrestore(&pending_free_lock, flags);
++
++ return 0;
++ }
++ case BLKTAP_IOCTL_MINOR:
++ {
++ unsigned long dev = arg;
++
++ info = tapfds[dev];
++
++ if ((dev > MAX_TAP_DEV) || !info)
++ return -EINVAL;
++
++ return info->minor;
++ }
++ case BLKTAP_IOCTL_MAJOR:
++ return blktap_major;
++
++ case BLKTAP_QUERY_ALLOC_REQS:
++ {
++ WPRINTK("BLKTAP_QUERY_ALLOC_REQS ioctl: %d/%d\n",
++ alloc_pending_reqs, blkif_reqs);
++ return (alloc_pending_reqs/blkif_reqs) * 100;
++ }
++ }
++ return -ENOIOCTLCMD;
++}
++
++static unsigned int blktap_poll(struct file *filp, poll_table *wait)
++{
++ tap_blkif_t *info = filp->private_data;
++
++ /* do not work on the control device */
++ if (!info)
++ return 0;
++
++ poll_wait(filp, &info->wait, wait);
++ if (info->ufe_ring.req_prod_pvt != info->ufe_ring.sring->req_prod) {
++ RING_PUSH_REQUESTS(&info->ufe_ring);
++ return POLLIN | POLLRDNORM;
++ }
++ return 0;
++}
++
++void blktap_kick_user(int idx)
++{
++ tap_blkif_t *info;
++
++ info = tapfds[idx];
++
++ if ((idx < 0) || (idx > MAX_TAP_DEV) || !info)
++ return;
++
++ wake_up_interruptible(&info->wait);
++
++ return;
++}
++
++static int do_block_io_op(blkif_t *blkif);
++static void dispatch_rw_block_io(blkif_t *blkif,
++ blkif_request_t *req,
++ pending_req_t *pending_req);
++static void make_response(blkif_t *blkif, u64 id,
++ unsigned short op, int st);
++
++/******************************************************************
++ * misc small helpers
++ */
++static int req_increase(void)
++{
++ int i, j;
++
++ if (mmap_alloc >= MAX_PENDING_REQS || mmap_lock)
++ return -EINVAL;
++
++ pending_reqs[mmap_alloc] = kzalloc(sizeof(pending_req_t)
++ * blkif_reqs, GFP_KERNEL);
++ foreign_pages[mmap_alloc] = alloc_empty_pages_and_pagevec(mmap_pages);
++
++ if (!pending_reqs[mmap_alloc] || !foreign_pages[mmap_alloc])
++ goto out_of_memory;
++
++ DPRINTK("%s: reqs=%d, pages=%d\n",
++ __FUNCTION__, blkif_reqs, mmap_pages);
++
++ for (i = 0; i < MAX_PENDING_REQS; i++) {
++ list_add_tail(&pending_reqs[mmap_alloc][i].free_list,
++ &pending_free);
++ pending_reqs[mmap_alloc][i].mem_idx = mmap_alloc;
++ for (j = 0; j < BLKIF_MAX_SEGMENTS_PER_REQUEST; j++)
++ BLKTAP_INVALIDATE_HANDLE(&pending_handle(mmap_alloc,
++ i, j));
++ }
++
++ mmap_alloc++;
++ DPRINTK("# MMAPs increased to %d\n",mmap_alloc);
++ return 0;
++
++ out_of_memory:
++ free_empty_pages_and_pagevec(foreign_pages[mmap_alloc], mmap_pages);
++ kfree(pending_reqs[mmap_alloc]);
++ WPRINTK("%s: out of memory\n", __FUNCTION__);
++ return -ENOMEM;
++}
++
++static void mmap_req_del(int mmap)
++{
++ BUG_ON(!spin_is_locked(&pending_free_lock));
++
++ kfree(pending_reqs[mmap]);
++ pending_reqs[mmap] = NULL;
++
++ free_empty_pages_and_pagevec(foreign_pages[mmap_alloc], mmap_pages);
++ foreign_pages[mmap] = NULL;
++
++ mmap_lock = 0;
++ DPRINTK("# MMAPs decreased to %d\n",mmap_alloc);
++ mmap_alloc--;
++}
++
++static pending_req_t* alloc_req(void)
++{
++ pending_req_t *req = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&pending_free_lock, flags);
++
++ if (!list_empty(&pending_free)) {
++ req = list_entry(pending_free.next, pending_req_t, free_list);
++ list_del(&req->free_list);
++ }
++
++ if (req) {
++ req->inuse = 1;
++ alloc_pending_reqs++;
++ }
++ spin_unlock_irqrestore(&pending_free_lock, flags);
++
++ return req;
++}
++
++static void free_req(pending_req_t *req)
++{
++ unsigned long flags;
++ int was_empty;
++
++ spin_lock_irqsave(&pending_free_lock, flags);
++
++ alloc_pending_reqs--;
++ req->inuse = 0;
++ if (mmap_lock && (req->mem_idx == mmap_alloc-1)) {
++ mmap_inuse--;
++ if (mmap_inuse == 0) mmap_req_del(mmap_alloc-1);
++ spin_unlock_irqrestore(&pending_free_lock, flags);
++ return;
++ }
++ was_empty = list_empty(&pending_free);
++ list_add(&req->free_list, &pending_free);
++
++ spin_unlock_irqrestore(&pending_free_lock, flags);
++
++ if (was_empty)
++ wake_up(&pending_free_wq);
++}
++
++static void fast_flush_area(pending_req_t *req, int k_idx, int u_idx,
++ int tapidx)
++{
++ struct gnttab_unmap_grant_ref unmap[BLKIF_MAX_SEGMENTS_PER_REQUEST*2];
++ unsigned int i, invcount = 0, locked = 0;
++ struct grant_handle_pair *khandle;
++ uint64_t ptep;
++ int ret, mmap_idx;
++ unsigned long kvaddr, uvaddr;
++ tap_blkif_t *info;
++ struct mm_struct *mm;
++
++
++ info = tapfds[tapidx];
++
++ if ((tapidx < 0) || (tapidx > MAX_TAP_DEV) || !info) {
++ WPRINTK("fast_flush: Couldn't get info!\n");
++ return;
++ }
++
++ mm = info->vma ? info->vma->vm_mm : NULL;
++
++ if (info->vma != NULL &&
++ xen_feature(XENFEAT_auto_translated_physmap)) {
++ down_write(&mm->mmap_sem);
++ zap_page_range(info->vma,
++ MMAP_VADDR(info->user_vstart, u_idx, 0),
++ req->nr_pages << PAGE_SHIFT, NULL);
++ up_write(&mm->mmap_sem);
++ return;
++ }
++
++ mmap_idx = req->mem_idx;
++
++ for (i = 0; i < req->nr_pages; i++) {
++ kvaddr = idx_to_kaddr(mmap_idx, k_idx, i);
++ uvaddr = MMAP_VADDR(info->user_vstart, u_idx, i);
++
++ khandle = &pending_handle(mmap_idx, k_idx, i);
++
++ if (khandle->kernel != INVALID_GRANT_HANDLE) {
++ gnttab_set_unmap_op(&unmap[invcount],
++ idx_to_kaddr(mmap_idx, k_idx, i),
++ GNTMAP_host_map, khandle->kernel);
++ invcount++;
++
++ set_phys_to_machine(
++ __pa(idx_to_kaddr(mmap_idx, k_idx, i))
++ >> PAGE_SHIFT, INVALID_P2M_ENTRY);
++ }
++
++ if (khandle->user != INVALID_GRANT_HANDLE) {
++ BUG_ON(xen_feature(XENFEAT_auto_translated_physmap));
++ if (!locked++)
++ down_write(&mm->mmap_sem);
++ if (create_lookup_pte_addr(
++ mm,
++ MMAP_VADDR(info->user_vstart, u_idx, i),
++ &ptep) !=0) {
++ up_write(&mm->mmap_sem);
++ WPRINTK("Couldn't get a pte addr!\n");
++ return;
++ }
++
++ gnttab_set_unmap_op(&unmap[invcount], ptep,
++ GNTMAP_host_map
++ | GNTMAP_application_map
++ | GNTMAP_contains_pte,
++ khandle->user);
++ invcount++;
++ }
++
++ BLKTAP_INVALIDATE_HANDLE(khandle);
++ }
++ ret = HYPERVISOR_grant_table_op(
++ GNTTABOP_unmap_grant_ref, unmap, invcount);
++ BUG_ON(ret);
++
++ if (info->vma != NULL &&
++ !xen_feature(XENFEAT_auto_translated_physmap)) {
++ if (!locked++)
++ down_write(&mm->mmap_sem);
++ zap_page_range(info->vma,
++ MMAP_VADDR(info->user_vstart, u_idx, 0),
++ req->nr_pages << PAGE_SHIFT, NULL);
++ }
++
++ if (locked)
++ up_write(&mm->mmap_sem);
++}
++
++/******************************************************************
++ * SCHEDULER FUNCTIONS
++ */
++
++static void print_stats(blkif_t *blkif)
++{
++ printk(KERN_DEBUG "%s: oo %3d | rd %4d | wr %4d\n",
++ current->comm, blkif->st_oo_req,
++ blkif->st_rd_req, blkif->st_wr_req);
++ blkif->st_print = jiffies + msecs_to_jiffies(10 * 1000);
++ blkif->st_rd_req = 0;
++ blkif->st_wr_req = 0;
++ blkif->st_oo_req = 0;
++}
++
++int tap_blkif_schedule(void *arg)
++{
++ blkif_t *blkif = arg;
++
++ blkif_get(blkif);
++
++ if (debug_lvl)
++ printk(KERN_DEBUG "%s: started\n", current->comm);
++
++ while (!kthread_should_stop()) {
++ if (try_to_freeze())
++ continue;
++
++ wait_event_interruptible(
++ blkif->wq,
++ blkif->waiting_reqs || kthread_should_stop());
++ wait_event_interruptible(
++ pending_free_wq,
++ !list_empty(&pending_free) || kthread_should_stop());
++
++ blkif->waiting_reqs = 0;
++ smp_mb(); /* clear flag *before* checking for work */
++
++ if (do_block_io_op(blkif))
++ blkif->waiting_reqs = 1;
++
++ if (log_stats && time_after(jiffies, blkif->st_print))
++ print_stats(blkif);
++ }
++
++ if (log_stats)
++ print_stats(blkif);
++ if (debug_lvl)
++ printk(KERN_DEBUG "%s: exiting\n", current->comm);
++
++ blkif->xenblkd = NULL;
++ blkif_put(blkif);
++
++ return 0;
++}
++
++/******************************************************************
++ * COMPLETION CALLBACK -- Called by user level ioctl()
++ */
++
++static int blktap_read_ufe_ring(tap_blkif_t *info)
++{
++ /* This is called to read responses from the UFE ring. */
++ RING_IDX i, j, rp;
++ blkif_response_t *resp;
++ blkif_t *blkif=NULL;
++ int pending_idx, usr_idx, mmap_idx;
++ pending_req_t *pending_req;
++
++ if (!info)
++ return 0;
++
++ /* We currently only forward packets in INTERCEPT_FE mode. */
++ if (!(info->mode & BLKTAP_MODE_INTERCEPT_FE))
++ return 0;
++
++ /* for each outstanding message on the UFEring */
++ rp = info->ufe_ring.sring->rsp_prod;
++ rmb();
++
++ for (i = info->ufe_ring.rsp_cons; i != rp; i++) {
++ blkif_response_t res;
++ resp = RING_GET_RESPONSE(&info->ufe_ring, i);
++ memcpy(&res, resp, sizeof(res));
++ mb(); /* rsp_cons read by RING_FULL() in do_block_io_op(). */
++ ++info->ufe_ring.rsp_cons;
++
++ /*retrieve [usr_idx] to [mmap_idx,pending_idx] mapping*/
++ usr_idx = (int)res.id;
++ pending_idx = MASK_PEND_IDX(ID_TO_IDX(info->idx_map[usr_idx]));
++ mmap_idx = ID_TO_MIDX(info->idx_map[usr_idx]);
++
++ if ( (mmap_idx >= mmap_alloc) ||
++ (ID_TO_IDX(info->idx_map[usr_idx]) >= MAX_PENDING_REQS) )
++ WPRINTK("Incorrect req map"
++ "[%d], internal map [%d,%d (%d)]\n",
++ usr_idx, mmap_idx,
++ ID_TO_IDX(info->idx_map[usr_idx]),
++ MASK_PEND_IDX(
++ ID_TO_IDX(info->idx_map[usr_idx])));
++
++ pending_req = &pending_reqs[mmap_idx][pending_idx];
++ blkif = pending_req->blkif;
++
++ for (j = 0; j < pending_req->nr_pages; j++) {
++
++ unsigned long kvaddr, uvaddr;
++ struct page **map = info->vma->vm_private_data;
++ struct page *pg;
++ int offset;
++
++ uvaddr = MMAP_VADDR(info->user_vstart, usr_idx, j);
++ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, j);
++
++ pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
++ ClearPageReserved(pg);
++ offset = (uvaddr - info->vma->vm_start)
++ >> PAGE_SHIFT;
++ map[offset] = NULL;
++ }
++ fast_flush_area(pending_req, pending_idx, usr_idx, info->minor);
++ info->idx_map[usr_idx] = INVALID_REQ;
++ make_response(blkif, pending_req->id, res.operation,
++ res.status);
++ blkif_put(pending_req->blkif);
++ free_req(pending_req);
++ }
++
++ return 0;
++}
++
++
++/******************************************************************************
++ * NOTIFICATION FROM GUEST OS.
++ */
++
++static void blkif_notify_work(blkif_t *blkif)
++{
++ blkif->waiting_reqs = 1;
++ wake_up(&blkif->wq);
++}
++
++irqreturn_t tap_blkif_be_int(int irq, void *dev_id, struct pt_regs *regs)
++{
++ blkif_notify_work(dev_id);
++ return IRQ_HANDLED;
++}
++
++
++
++/******************************************************************
++ * DOWNWARD CALLS -- These interface with the block-device layer proper.
++ */
++static int print_dbug = 1;
++static int do_block_io_op(blkif_t *blkif)
++{
++ blkif_back_rings_t *blk_rings = &blkif->blk_rings;
++ blkif_request_t req;
++ pending_req_t *pending_req;
++ RING_IDX rc, rp;
++ int more_to_do = 0;
++ tap_blkif_t *info;
++
++ rc = blk_rings->common.req_cons;
++ rp = blk_rings->common.sring->req_prod;
++ rmb(); /* Ensure we see queued requests up to 'rp'. */
++
++ /*Check blkif has corresponding UE ring*/
++ if (blkif->dev_num < 0) {
++ /*oops*/
++ if (print_dbug) {
++ WPRINTK("Corresponding UE "
++ "ring does not exist!\n");
++ print_dbug = 0; /*We only print this message once*/
++ }
++ return 0;
++ }
++
++ info = tapfds[blkif->dev_num];
++
++ if (blkif->dev_num > MAX_TAP_DEV || !info || !info->dev_inuse) {
++ if (print_dbug) {
++ WPRINTK("Can't get UE info!\n");
++ print_dbug = 0;
++ }
++ return 0;
++ }
++
++ while (rc != rp) {
++
++ if (RING_FULL(&info->ufe_ring)) {
++ WPRINTK("RING_FULL! More to do\n");
++ more_to_do = 1;
++ break;
++ }
++
++ if (RING_REQUEST_CONS_OVERFLOW(&blk_rings->common, rc)) {
++ WPRINTK("RING_REQUEST_CONS_OVERFLOW!"
++ " More to do\n");
++ more_to_do = 1;
++ break;
++ }
++
++ pending_req = alloc_req();
++ if (NULL == pending_req) {
++ blkif->st_oo_req++;
++ more_to_do = 1;
++ break;
++ }
++
++ if (kthread_should_stop()) {
++ more_to_do = 1;
++ break;
++ }
++
++ switch (blkif->blk_protocol) {
++ case BLKIF_PROTOCOL_NATIVE:
++ memcpy(&req, RING_GET_REQUEST(&blk_rings->native, rc),
++ sizeof(req));
++ break;
++ case BLKIF_PROTOCOL_X86_32:
++ blkif_get_x86_32_req(&req, RING_GET_REQUEST(&blk_rings->x86_32, rc));
++ break;
++ case BLKIF_PROTOCOL_X86_64:
++ blkif_get_x86_64_req(&req, RING_GET_REQUEST(&blk_rings->x86_64, rc));
++ break;
++ default:
++ BUG();
++ }
++ blk_rings->common.req_cons = ++rc; /* before make_response() */
++
++ /* Apply all sanity checks to /private copy/ of request. */
++ barrier();
++
++ switch (req.operation) {
++ case BLKIF_OP_READ:
++ blkif->st_rd_req++;
++ dispatch_rw_block_io(blkif, &req, pending_req);
++ break;
++
++ case BLKIF_OP_WRITE:
++ blkif->st_wr_req++;
++ dispatch_rw_block_io(blkif, &req, pending_req);
++ break;
++
++ default:
++ /* A good sign something is wrong: sleep for a while to
++ * avoid excessive CPU consumption by a bad guest. */
++ msleep(1);
++ WPRINTK("unknown operation [%d]\n",
++ req.operation);
++ make_response(blkif, req.id, req.operation,
++ BLKIF_RSP_ERROR);
++ free_req(pending_req);
++ break;
++ }
++
++ /* Yield point for this unbounded loop. */
++ cond_resched();
++ }
++
++ blktap_kick_user(blkif->dev_num);
++
++ return more_to_do;
++}
++
++static void dispatch_rw_block_io(blkif_t *blkif,
++ blkif_request_t *req,
++ pending_req_t *pending_req)
++{
++ extern void ll_rw_block(int rw, int nr, struct buffer_head * bhs[]);
++ int op, operation = (req->operation == BLKIF_OP_WRITE) ? WRITE : READ;
++ struct gnttab_map_grant_ref map[BLKIF_MAX_SEGMENTS_PER_REQUEST*2];
++ unsigned int nseg;
++ int ret, i, nr_sects = 0;
++ tap_blkif_t *info;
++ blkif_request_t *target;
++ int pending_idx = RTN_PEND_IDX(pending_req,pending_req->mem_idx);
++ int usr_idx;
++ uint16_t mmap_idx = pending_req->mem_idx;
++ struct mm_struct *mm;
++
++ if (blkif->dev_num < 0 || blkif->dev_num > MAX_TAP_DEV)
++ goto fail_response;
++
++ info = tapfds[blkif->dev_num];
++ if (info == NULL)
++ goto fail_response;
++
++ /* Check we have space on user ring - should never fail. */
++ usr_idx = GET_NEXT_REQ(info->idx_map);
++ if (usr_idx == INVALID_REQ) {
++ BUG();
++ goto fail_response;
++ }
++
++ /* Check that number of segments is sane. */
++ nseg = req->nr_segments;
++ if ( unlikely(nseg == 0) ||
++ unlikely(nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST) ) {
++ WPRINTK("Bad number of segments in request (%d)\n", nseg);
++ goto fail_response;
++ }
++
++ /* Make sure userspace is ready. */
++ if (!info->ring_ok) {
++ WPRINTK("blktap: ring not ready for requests!\n");
++ goto fail_response;
++ }
++
++ if (RING_FULL(&info->ufe_ring)) {
++ WPRINTK("blktap: fe_ring is full, can't add "
++ "IO Request will be dropped. %d %d\n",
++ RING_SIZE(&info->ufe_ring),
++ RING_SIZE(&blkif->blk_rings.common));
++ goto fail_response;
++ }
++
++ pending_req->blkif = blkif;
++ pending_req->id = req->id;
++ pending_req->operation = operation;
++ pending_req->status = BLKIF_RSP_OKAY;
++ pending_req->nr_pages = nseg;
++ op = 0;
++ mm = info->vma->vm_mm;
++ if (!xen_feature(XENFEAT_auto_translated_physmap))
++ down_write(&mm->mmap_sem);
++ for (i = 0; i < nseg; i++) {
++ unsigned long uvaddr;
++ unsigned long kvaddr;
++ uint64_t ptep;
++ uint32_t flags;
++
++ uvaddr = MMAP_VADDR(info->user_vstart, usr_idx, i);
++ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i);
++
++ flags = GNTMAP_host_map;
++ if (operation == WRITE)
++ flags |= GNTMAP_readonly;
++ gnttab_set_map_op(&map[op], kvaddr, flags,
++ req->seg[i].gref, blkif->domid);
++ op++;
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ /* Now map it to user. */
++ ret = create_lookup_pte_addr(mm, uvaddr, &ptep);
++ if (ret) {
++ up_write(&mm->mmap_sem);
++ WPRINTK("Couldn't get a pte addr!\n");
++ goto fail_flush;
++ }
++
++ flags = GNTMAP_host_map | GNTMAP_application_map
++ | GNTMAP_contains_pte;
++ if (operation == WRITE)
++ flags |= GNTMAP_readonly;
++ gnttab_set_map_op(&map[op], ptep, flags,
++ req->seg[i].gref, blkif->domid);
++ op++;
++ }
++
++ nr_sects += (req->seg[i].last_sect -
++ req->seg[i].first_sect + 1);
++ }
++
++ ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map, op);
++ BUG_ON(ret);
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ up_write(&mm->mmap_sem);
++
++ for (i = 0; i < (nseg*2); i+=2) {
++ unsigned long uvaddr;
++ unsigned long kvaddr;
++ unsigned long offset;
++ struct page *pg;
++
++ uvaddr = MMAP_VADDR(info->user_vstart, usr_idx, i/2);
++ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i/2);
++
++ if (unlikely(map[i].status != 0)) {
++ WPRINTK("invalid kernel buffer -- "
++ "could not remap it\n");
++ ret |= 1;
++ map[i].handle = INVALID_GRANT_HANDLE;
++ }
++
++ if (unlikely(map[i+1].status != 0)) {
++ WPRINTK("invalid user buffer -- "
++ "could not remap it\n");
++ ret |= 1;
++ map[i+1].handle = INVALID_GRANT_HANDLE;
++ }
++
++ pending_handle(mmap_idx, pending_idx, i/2).kernel
++ = map[i].handle;
++ pending_handle(mmap_idx, pending_idx, i/2).user
++ = map[i+1].handle;
++
++ if (ret)
++ continue;
++
++ set_phys_to_machine(__pa(kvaddr) >> PAGE_SHIFT,
++ FOREIGN_FRAME(map[i].dev_bus_addr
++ >> PAGE_SHIFT));
++ offset = (uvaddr - info->vma->vm_start) >> PAGE_SHIFT;
++ pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
++ ((struct page **)info->vma->vm_private_data)[offset] =
++ pg;
++ }
++ } else {
++ for (i = 0; i < nseg; i++) {
++ unsigned long uvaddr;
++ unsigned long kvaddr;
++ unsigned long offset;
++ struct page *pg;
++
++ uvaddr = MMAP_VADDR(info->user_vstart, usr_idx, i);
++ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i);
++
++ if (unlikely(map[i].status != 0)) {
++ WPRINTK("invalid kernel buffer -- "
++ "could not remap it\n");
++ ret |= 1;
++ map[i].handle = INVALID_GRANT_HANDLE;
++ }
++
++ pending_handle(mmap_idx, pending_idx, i).kernel
++ = map[i].handle;
++
++ if (ret)
++ continue;
++
++ offset = (uvaddr - info->vma->vm_start) >> PAGE_SHIFT;
++ pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
++ ((struct page **)info->vma->vm_private_data)[offset] =
++ pg;
++ }
++ }
++
++ if (ret)
++ goto fail_flush;
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ down_write(&mm->mmap_sem);
++ /* Mark mapped pages as reserved: */
++ for (i = 0; i < req->nr_segments; i++) {
++ unsigned long kvaddr;
++ struct page *pg;
++
++ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i);
++ pg = pfn_to_page(__pa(kvaddr) >> PAGE_SHIFT);
++ SetPageReserved(pg);
++ if (xen_feature(XENFEAT_auto_translated_physmap)) {
++ ret = vm_insert_page(info->vma,
++ MMAP_VADDR(info->user_vstart,
++ usr_idx, i), pg);
++ if (ret) {
++ up_write(&mm->mmap_sem);
++ goto fail_flush;
++ }
++ }
++ }
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ up_write(&mm->mmap_sem);
++
++ /*record [mmap_idx,pending_idx] to [usr_idx] mapping*/
++ info->idx_map[usr_idx] = MAKE_ID(mmap_idx, pending_idx);
++
++ blkif_get(blkif);
++ /* Finally, write the request message to the user ring. */
++ target = RING_GET_REQUEST(&info->ufe_ring,
++ info->ufe_ring.req_prod_pvt);
++ memcpy(target, req, sizeof(*req));
++ target->id = usr_idx;
++ wmb(); /* blktap_poll() reads req_prod_pvt asynchronously */
++ info->ufe_ring.req_prod_pvt++;
++
++ if (operation == READ)
++ blkif->st_rd_sect += nr_sects;
++ else if (operation == WRITE)
++ blkif->st_wr_sect += nr_sects;
++
++ return;
++
++ fail_flush:
++ WPRINTK("Reached Fail_flush\n");
++ fast_flush_area(pending_req, pending_idx, usr_idx, blkif->dev_num);
++ fail_response:
++ make_response(blkif, req->id, req->operation, BLKIF_RSP_ERROR);
++ free_req(pending_req);
++ msleep(1); /* back off a bit */
++}
++
++
++
++/******************************************************************
++ * MISCELLANEOUS SETUP / TEARDOWN / DEBUGGING
++ */
++
++
++static void make_response(blkif_t *blkif, u64 id,
++ unsigned short op, int st)
++{
++ blkif_response_t resp;
++ unsigned long flags;
++ blkif_back_rings_t *blk_rings = &blkif->blk_rings;
++ int more_to_do = 0;
++ int notify;
++
++ resp.id = id;
++ resp.operation = op;
++ resp.status = st;
++
++ spin_lock_irqsave(&blkif->blk_ring_lock, flags);
++ /* Place on the response ring for the relevant domain. */
++ switch (blkif->blk_protocol) {
++ case BLKIF_PROTOCOL_NATIVE:
++ memcpy(RING_GET_RESPONSE(&blk_rings->native,
++ blk_rings->native.rsp_prod_pvt),
++ &resp, sizeof(resp));
++ break;
++ case BLKIF_PROTOCOL_X86_32:
++ memcpy(RING_GET_RESPONSE(&blk_rings->x86_32,
++ blk_rings->x86_32.rsp_prod_pvt),
++ &resp, sizeof(resp));
++ break;
++ case BLKIF_PROTOCOL_X86_64:
++ memcpy(RING_GET_RESPONSE(&blk_rings->x86_64,
++ blk_rings->x86_64.rsp_prod_pvt),
++ &resp, sizeof(resp));
++ break;
++ default:
++ BUG();
++ }
++ blk_rings->common.rsp_prod_pvt++;
++ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&blk_rings->common, notify);
++
++ if (blk_rings->common.rsp_prod_pvt == blk_rings->common.req_cons) {
++ /*
++ * Tail check for pending requests. Allows frontend to avoid
++ * notifications if requests are already in flight (lower
++ * overheads and promotes batching).
++ */
++ RING_FINAL_CHECK_FOR_REQUESTS(&blk_rings->common, more_to_do);
++ } else if (RING_HAS_UNCONSUMED_REQUESTS(&blk_rings->common)) {
++ more_to_do = 1;
++ }
++
++ spin_unlock_irqrestore(&blkif->blk_ring_lock, flags);
++ if (more_to_do)
++ blkif_notify_work(blkif);
++ if (notify)
++ notify_remote_via_irq(blkif->irq);
++}
++
++static int __init blkif_init(void)
++{
++ int i, ret;
++ struct class *class;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ INIT_LIST_HEAD(&pending_free);
++ for(i = 0; i < 2; i++) {
++ ret = req_increase();
++ if (ret)
++ break;
++ }
++ if (i == 0)
++ return ret;
++
++ tap_blkif_interface_init();
++
++ alloc_pending_reqs = 0;
++
++ tap_blkif_xenbus_init();
++
++ /* Dynamically allocate a major for this device */
++ ret = register_chrdev(0, "blktap", &blktap_fops);
++
++ if (ret < 0) {
++ WPRINTK("Couldn't register /dev/xen/blktap\n");
++ return -ENOMEM;
++ }
++
++ blktap_major = ret;
++
++ /* tapfds[0] is always NULL */
++ blktap_next_minor++;
++
++ DPRINTK("Created misc_dev [/dev/xen/blktap%d]\n",i);
++
++ /* Make sure the xen class exists */
++ if ((class = get_xen_class()) != NULL) {
++ /*
++ * This will allow udev to create the blktap ctrl device.
++ * We only want to create blktap0 first. We don't want
++ * to flood the sysfs system with needless blktap devices.
++ * We only create the device when a request of a new device is
++ * made.
++ */
++ class_device_create(class, NULL,
++ MKDEV(blktap_major, 0), NULL,
++ "blktap0");
++ } else {
++ /* this is bad, but not fatal */
++ WPRINTK("blktap: sysfs xen_class not created\n");
++ }
++
++ DPRINTK("Blktap device successfully created\n");
++
++ return 0;
++}
++
++module_init(blkif_init);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/blktap/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blktap/common.h 2008-09-15 13:40:15.000000000 +0200
+@@ -0,0 +1,122 @@
++/*
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __BLKIF__BACKEND__COMMON_H__
++#define __BLKIF__BACKEND__COMMON_H__
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/interrupt.h>
++#include <linux/slab.h>
++#include <linux/blkdev.h>
++#include <linux/vmalloc.h>
++#include <asm/io.h>
++#include <asm/setup.h>
++#include <asm/pgalloc.h>
++#include <xen/evtchn.h>
++#include <asm/hypervisor.h>
++#include <xen/blkif.h>
++#include <xen/gnttab.h>
++#include <xen/driver_util.h>
++
++#define DPRINTK(_f, _a...) pr_debug("(file=%s, line=%d) " _f, \
++ __FILE__ , __LINE__ , ## _a )
++
++#define WPRINTK(fmt, args...) printk(KERN_WARNING "blk_tap: " fmt, ##args)
++
++struct backend_info;
++
++typedef struct blkif_st {
++ /* Unique identifier for this interface. */
++ domid_t domid;
++ unsigned int handle;
++ /* Physical parameters of the comms window. */
++ unsigned int irq;
++ /* Comms information. */
++ enum blkif_protocol blk_protocol;
++ blkif_back_rings_t blk_rings;
++ struct vm_struct *blk_ring_area;
++ /* Back pointer to the backend_info. */
++ struct backend_info *be;
++ /* Private fields. */
++ spinlock_t blk_ring_lock;
++ atomic_t refcnt;
++
++ wait_queue_head_t wq;
++ struct task_struct *xenblkd;
++ unsigned int waiting_reqs;
++ request_queue_t *plug;
++
++ /* statistics */
++ unsigned long st_print;
++ int st_rd_req;
++ int st_wr_req;
++ int st_oo_req;
++ int st_rd_sect;
++ int st_wr_sect;
++
++ wait_queue_head_t waiting_to_free;
++
++ grant_handle_t shmem_handle;
++ grant_ref_t shmem_ref;
++
++ int dev_num;
++ uint64_t sectors;
++} blkif_t;
++
++blkif_t *tap_alloc_blkif(domid_t domid);
++void tap_blkif_free(blkif_t *blkif);
++void tap_blkif_kmem_cache_free(blkif_t *blkif);
++int tap_blkif_map(blkif_t *blkif, unsigned long shared_page,
++ unsigned int evtchn);
++void tap_blkif_unmap(blkif_t *blkif);
++
++#define blkif_get(_b) (atomic_inc(&(_b)->refcnt))
++#define blkif_put(_b) \
++ do { \
++ if (atomic_dec_and_test(&(_b)->refcnt)) \
++ wake_up(&(_b)->waiting_to_free);\
++ } while (0)
++
++
++struct phys_req {
++ unsigned short dev;
++ unsigned short nr_sects;
++ struct block_device *bdev;
++ blkif_sector_t sector_number;
++};
++
++void tap_blkif_interface_init(void);
++
++void tap_blkif_xenbus_init(void);
++
++irqreturn_t tap_blkif_be_int(int irq, void *dev_id, struct pt_regs *regs);
++int tap_blkif_schedule(void *arg);
++
++int dom_to_devid(domid_t domid, int xenbus_id, blkif_t *blkif);
++void signal_tapdisk(int idx);
++
++#endif /* __BLKIF__BACKEND__COMMON_H__ */
+Index: head-2008-11-25/drivers/xen/blktap/interface.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blktap/interface.c 2008-09-15 13:40:15.000000000 +0200
+@@ -0,0 +1,181 @@
++/******************************************************************************
++ * drivers/xen/blktap/interface.c
++ *
++ * Block-device interface management.
++ *
++ * Copyright (c) 2004, Keir Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++
++ */
++
++#include "common.h"
++#include <xen/evtchn.h>
++
++static kmem_cache_t *blkif_cachep;
++
++blkif_t *tap_alloc_blkif(domid_t domid)
++{
++ blkif_t *blkif;
++
++ blkif = kmem_cache_alloc(blkif_cachep, GFP_KERNEL);
++ if (!blkif)
++ return ERR_PTR(-ENOMEM);
++
++ memset(blkif, 0, sizeof(*blkif));
++ blkif->domid = domid;
++ spin_lock_init(&blkif->blk_ring_lock);
++ atomic_set(&blkif->refcnt, 1);
++ init_waitqueue_head(&blkif->wq);
++ blkif->st_print = jiffies;
++ init_waitqueue_head(&blkif->waiting_to_free);
++
++ return blkif;
++}
++
++static int map_frontend_page(blkif_t *blkif, unsigned long shared_page)
++{
++ struct gnttab_map_grant_ref op;
++
++ gnttab_set_map_op(&op, (unsigned long)blkif->blk_ring_area->addr,
++ GNTMAP_host_map, shared_page, blkif->domid);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status) {
++ DPRINTK(" Grant table operation failure !\n");
++ return op.status;
++ }
++
++ blkif->shmem_ref = shared_page;
++ blkif->shmem_handle = op.handle;
++
++ return 0;
++}
++
++static void unmap_frontend_page(blkif_t *blkif)
++{
++ struct gnttab_unmap_grant_ref op;
++
++ gnttab_set_unmap_op(&op, (unsigned long)blkif->blk_ring_area->addr,
++ GNTMAP_host_map, blkif->shmem_handle);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++}
++
++int tap_blkif_map(blkif_t *blkif, unsigned long shared_page,
++ unsigned int evtchn)
++{
++ int err;
++
++ /* Already connected through? */
++ if (blkif->irq)
++ return 0;
++
++ if ( (blkif->blk_ring_area = alloc_vm_area(PAGE_SIZE)) == NULL )
++ return -ENOMEM;
++
++ err = map_frontend_page(blkif, shared_page);
++ if (err) {
++ free_vm_area(blkif->blk_ring_area);
++ return err;
++ }
++
++ switch (blkif->blk_protocol) {
++ case BLKIF_PROTOCOL_NATIVE:
++ {
++ blkif_sring_t *sring;
++ sring = (blkif_sring_t *)blkif->blk_ring_area->addr;
++ BACK_RING_INIT(&blkif->blk_rings.native, sring, PAGE_SIZE);
++ break;
++ }
++ case BLKIF_PROTOCOL_X86_32:
++ {
++ blkif_x86_32_sring_t *sring_x86_32;
++ sring_x86_32 = (blkif_x86_32_sring_t *)blkif->blk_ring_area->addr;
++ BACK_RING_INIT(&blkif->blk_rings.x86_32, sring_x86_32, PAGE_SIZE);
++ break;
++ }
++ case BLKIF_PROTOCOL_X86_64:
++ {
++ blkif_x86_64_sring_t *sring_x86_64;
++ sring_x86_64 = (blkif_x86_64_sring_t *)blkif->blk_ring_area->addr;
++ BACK_RING_INIT(&blkif->blk_rings.x86_64, sring_x86_64, PAGE_SIZE);
++ break;
++ }
++ default:
++ BUG();
++ }
++
++ err = bind_interdomain_evtchn_to_irqhandler(
++ blkif->domid, evtchn, tap_blkif_be_int,
++ 0, "blkif-backend", blkif);
++ if (err < 0) {
++ unmap_frontend_page(blkif);
++ free_vm_area(blkif->blk_ring_area);
++ blkif->blk_rings.common.sring = NULL;
++ return err;
++ }
++ blkif->irq = err;
++
++ return 0;
++}
++
++void tap_blkif_unmap(blkif_t *blkif)
++{
++ if (blkif->irq) {
++ unbind_from_irqhandler(blkif->irq, blkif);
++ blkif->irq = 0;
++ }
++ if (blkif->blk_rings.common.sring) {
++ unmap_frontend_page(blkif);
++ free_vm_area(blkif->blk_ring_area);
++ blkif->blk_rings.common.sring = NULL;
++ }
++}
++
++void tap_blkif_free(blkif_t *blkif)
++{
++ atomic_dec(&blkif->refcnt);
++ wait_event(blkif->waiting_to_free, atomic_read(&blkif->refcnt) == 0);
++ atomic_inc(&blkif->refcnt);
++
++ tap_blkif_unmap(blkif);
++}
++
++void tap_blkif_kmem_cache_free(blkif_t *blkif)
++{
++ if (!atomic_dec_and_test(&blkif->refcnt))
++ BUG();
++ kmem_cache_free(blkif_cachep, blkif);
++}
++
++void __init tap_blkif_interface_init(void)
++{
++ blkif_cachep = kmem_cache_create("blktapif_cache", sizeof(blkif_t),
++ 0, 0, NULL, NULL);
++}
+Index: head-2008-11-25/drivers/xen/blktap/xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/blktap/xenbus.c 2008-09-15 13:40:15.000000000 +0200
+@@ -0,0 +1,479 @@
++/* drivers/xen/blktap/xenbus.c
++ *
++ * Xenbus code for blktap
++ *
++ * Copyright (c) 2004-2005, Andrew Warfield and Julian Chesterfield
++ *
++ * Based on the blkback xenbus code:
++ *
++ * Copyright (C) 2005 Rusty Russell <rusty@rustcorp.com.au>
++ * Copyright (C) 2005 XenSource Ltd
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <stdarg.h>
++#include <linux/module.h>
++#include <linux/kthread.h>
++#include <xen/xenbus.h>
++#include "common.h"
++
++
++struct backend_info
++{
++ struct xenbus_device *dev;
++ blkif_t *blkif;
++ struct xenbus_watch backend_watch;
++ int xenbus_id;
++ int group_added;
++};
++
++
++static void connect(struct backend_info *);
++static int connect_ring(struct backend_info *);
++static int blktap_remove(struct xenbus_device *dev);
++static int blktap_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id);
++static void tap_backend_changed(struct xenbus_watch *, const char **,
++ unsigned int);
++static void tap_frontend_changed(struct xenbus_device *dev,
++ enum xenbus_state frontend_state);
++
++static int strsep_len(const char *str, char c, unsigned int len)
++{
++ unsigned int i;
++
++ for (i = 0; str[i]; i++)
++ if (str[i] == c) {
++ if (len == 0)
++ return i;
++ len--;
++ }
++ return (len == 0) ? i : -ERANGE;
++}
++
++static long get_id(const char *str)
++{
++ int len,end;
++ const char *ptr;
++ char *tptr, num[10];
++
++ len = strsep_len(str, '/', 2);
++ end = strlen(str);
++ if ( (len < 0) || (end < 0) ) return -1;
++
++ ptr = str + len + 1;
++ strncpy(num,ptr,end - len);
++ tptr = num + (end - (len + 1));
++ *tptr = '\0';
++ DPRINTK("Get_id called for %s (%s)\n",str,num);
++
++ return simple_strtol(num, NULL, 10);
++}
++
++static int blktap_name(blkif_t *blkif, char *buf)
++{
++ char *devpath, *devname;
++ struct xenbus_device *dev = blkif->be->dev;
++
++ devpath = xenbus_read(XBT_NIL, dev->nodename, "dev", NULL);
++ if (IS_ERR(devpath))
++ return PTR_ERR(devpath);
++
++ if ((devname = strstr(devpath, "/dev/")) != NULL)
++ devname += strlen("/dev/");
++ else
++ devname = devpath;
++
++ snprintf(buf, TASK_COMM_LEN, "blktap.%d.%s", blkif->domid, devname);
++ kfree(devpath);
++
++ return 0;
++}
++
++/****************************************************************
++ * sysfs interface for I/O requests of blktap device
++ */
++
++#define VBD_SHOW(name, format, args...) \
++ static ssize_t show_##name(struct device *_dev, \
++ struct device_attribute *attr, \
++ char *buf) \
++ { \
++ struct xenbus_device *dev = to_xenbus_device(_dev); \
++ struct backend_info *be = dev->dev.driver_data; \
++ \
++ return sprintf(buf, format, ##args); \
++ } \
++ static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
++
++VBD_SHOW(oo_req, "%d\n", be->blkif->st_oo_req);
++VBD_SHOW(rd_req, "%d\n", be->blkif->st_rd_req);
++VBD_SHOW(wr_req, "%d\n", be->blkif->st_wr_req);
++VBD_SHOW(rd_sect, "%d\n", be->blkif->st_rd_sect);
++VBD_SHOW(wr_sect, "%d\n", be->blkif->st_wr_sect);
++
++static struct attribute *tapstat_attrs[] = {
++ &dev_attr_oo_req.attr,
++ &dev_attr_rd_req.attr,
++ &dev_attr_wr_req.attr,
++ &dev_attr_rd_sect.attr,
++ &dev_attr_wr_sect.attr,
++ NULL
++};
++
++static struct attribute_group tapstat_group = {
++ .name = "statistics",
++ .attrs = tapstat_attrs,
++};
++
++int xentap_sysfs_addif(struct xenbus_device *dev)
++{
++ int err;
++ struct backend_info *be = dev->dev.driver_data;
++ err = sysfs_create_group(&dev->dev.kobj, &tapstat_group);
++ if (!err)
++ be->group_added = 1;
++ return err;
++}
++
++void xentap_sysfs_delif(struct xenbus_device *dev)
++{
++ struct backend_info *be = dev->dev.driver_data;
++ sysfs_remove_group(&dev->dev.kobj, &tapstat_group);
++ be->group_added = 0;
++}
++
++static int blktap_remove(struct xenbus_device *dev)
++{
++ struct backend_info *be = dev->dev.driver_data;
++
++ if (be->group_added)
++ xentap_sysfs_delif(be->dev);
++ if (be->backend_watch.node) {
++ unregister_xenbus_watch(&be->backend_watch);
++ kfree(be->backend_watch.node);
++ be->backend_watch.node = NULL;
++ }
++ if (be->blkif) {
++ if (be->blkif->xenblkd)
++ kthread_stop(be->blkif->xenblkd);
++ signal_tapdisk(be->blkif->dev_num);
++ tap_blkif_free(be->blkif);
++ tap_blkif_kmem_cache_free(be->blkif);
++ be->blkif = NULL;
++ }
++ kfree(be);
++ dev->dev.driver_data = NULL;
++ return 0;
++}
++
++static void tap_update_blkif_status(blkif_t *blkif)
++{
++ int err;
++ char name[TASK_COMM_LEN];
++
++ /* Not ready to connect? */
++ if(!blkif->irq || !blkif->sectors) {
++ return;
++ }
++
++ /* Already connected? */
++ if (blkif->be->dev->state == XenbusStateConnected)
++ return;
++
++ /* Attempt to connect: exit if we fail to. */
++ connect(blkif->be);
++ if (blkif->be->dev->state != XenbusStateConnected)
++ return;
++
++ err = blktap_name(blkif, name);
++ if (err) {
++ xenbus_dev_error(blkif->be->dev, err, "get blktap dev name");
++ return;
++ }
++
++ if (!blkif->be->group_added) {
++ err = xentap_sysfs_addif(blkif->be->dev);
++ if (err) {
++ xenbus_dev_fatal(blkif->be->dev, err,
++ "creating sysfs entries");
++ return;
++ }
++ }
++
++ blkif->xenblkd = kthread_run(tap_blkif_schedule, blkif, name);
++ if (IS_ERR(blkif->xenblkd)) {
++ err = PTR_ERR(blkif->xenblkd);
++ blkif->xenblkd = NULL;
++ xenbus_dev_fatal(blkif->be->dev, err, "start xenblkd");
++ WPRINTK("Error starting thread\n");
++ }
++}
++
++/**
++ * Entry point to this code when a new device is created. Allocate
++ * the basic structures, and watch the store waiting for the
++ * user-space program to tell us the physical device info. Switch to
++ * InitWait.
++ */
++static int blktap_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int err;
++ struct backend_info *be = kzalloc(sizeof(struct backend_info),
++ GFP_KERNEL);
++ if (!be) {
++ xenbus_dev_fatal(dev, -ENOMEM,
++ "allocating backend structure");
++ return -ENOMEM;
++ }
++
++ be->dev = dev;
++ dev->dev.driver_data = be;
++ be->xenbus_id = get_id(dev->nodename);
++
++ be->blkif = tap_alloc_blkif(dev->otherend_id);
++ if (IS_ERR(be->blkif)) {
++ err = PTR_ERR(be->blkif);
++ be->blkif = NULL;
++ xenbus_dev_fatal(dev, err, "creating block interface");
++ goto fail;
++ }
++
++ /* setup back pointer */
++ be->blkif->be = be;
++ be->blkif->sectors = 0;
++
++ /* set a watch on disk info, waiting for userspace to update details*/
++ err = xenbus_watch_path2(dev, dev->nodename, "info",
++ &be->backend_watch, tap_backend_changed);
++ if (err)
++ goto fail;
++
++ err = xenbus_switch_state(dev, XenbusStateInitWait);
++ if (err)
++ goto fail;
++ return 0;
++
++fail:
++ DPRINTK("blktap probe failed\n");
++ blktap_remove(dev);
++ return err;
++}
++
++
++/**
++ * Callback received when the user space code has placed the device
++ * information in xenstore.
++ */
++static void tap_backend_changed(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ int err;
++ unsigned long info;
++ struct backend_info *be
++ = container_of(watch, struct backend_info, backend_watch);
++ struct xenbus_device *dev = be->dev;
++
++ /**
++ * Check to see whether userspace code has opened the image
++ * and written sector
++ * and disk info to xenstore
++ */
++ err = xenbus_gather(XBT_NIL, dev->nodename, "info", "%lu", &info,
++ NULL);
++ if (XENBUS_EXIST_ERR(err))
++ return;
++ if (err) {
++ xenbus_dev_error(dev, err, "getting info");
++ return;
++ }
++
++ DPRINTK("Userspace update on disk info, %lu\n",info);
++
++ err = xenbus_gather(XBT_NIL, dev->nodename, "sectors", "%llu",
++ &be->blkif->sectors, NULL);
++
++ /* Associate tap dev with domid*/
++ be->blkif->dev_num = dom_to_devid(be->blkif->domid, be->xenbus_id,
++ be->blkif);
++ DPRINTK("Thread started for domid [%d], connecting disk\n",
++ be->blkif->dev_num);
++
++ tap_update_blkif_status(be->blkif);
++}
++
++/**
++ * Callback received when the frontend's state changes.
++ */
++static void tap_frontend_changed(struct xenbus_device *dev,
++ enum xenbus_state frontend_state)
++{
++ struct backend_info *be = dev->dev.driver_data;
++ int err;
++
++ DPRINTK("\n");
++
++ switch (frontend_state) {
++ case XenbusStateInitialising:
++ if (dev->state == XenbusStateClosed) {
++ printk(KERN_INFO "%s: %s: prepare for reconnect\n",
++ __FUNCTION__, dev->nodename);
++ xenbus_switch_state(dev, XenbusStateInitWait);
++ }
++ break;
++
++ case XenbusStateInitialised:
++ case XenbusStateConnected:
++ /* Ensure we connect even when two watches fire in
++ close successsion and we miss the intermediate value
++ of frontend_state. */
++ if (dev->state == XenbusStateConnected)
++ break;
++
++ err = connect_ring(be);
++ if (err)
++ break;
++ tap_update_blkif_status(be->blkif);
++ break;
++
++ case XenbusStateClosing:
++ if (be->blkif->xenblkd) {
++ kthread_stop(be->blkif->xenblkd);
++ be->blkif->xenblkd = NULL;
++ }
++ tap_blkif_free(be->blkif);
++ xenbus_switch_state(dev, XenbusStateClosing);
++ break;
++
++ case XenbusStateClosed:
++ xenbus_switch_state(dev, XenbusStateClosed);
++ if (xenbus_dev_is_online(dev))
++ break;
++ /* fall through if not online */
++ case XenbusStateUnknown:
++ device_unregister(&dev->dev);
++ break;
++
++ default:
++ xenbus_dev_fatal(dev, -EINVAL, "saw state %d at frontend",
++ frontend_state);
++ break;
++ }
++}
++
++
++/**
++ * Switch to Connected state.
++ */
++static void connect(struct backend_info *be)
++{
++ int err;
++
++ struct xenbus_device *dev = be->dev;
++
++ err = xenbus_switch_state(dev, XenbusStateConnected);
++ if (err)
++ xenbus_dev_fatal(dev, err, "switching to Connected state",
++ dev->nodename);
++
++ return;
++}
++
++
++static int connect_ring(struct backend_info *be)
++{
++ struct xenbus_device *dev = be->dev;
++ unsigned long ring_ref;
++ unsigned int evtchn;
++ char protocol[64];
++ int err;
++
++ DPRINTK("%s\n", dev->otherend);
++
++ err = xenbus_gather(XBT_NIL, dev->otherend, "ring-ref", "%lu",
++ &ring_ref, "event-channel", "%u", &evtchn, NULL);
++ if (err) {
++ xenbus_dev_fatal(dev, err,
++ "reading %s/ring-ref and event-channel",
++ dev->otherend);
++ return err;
++ }
++
++ be->blkif->blk_protocol = BLKIF_PROTOCOL_NATIVE;
++ err = xenbus_gather(XBT_NIL, dev->otherend, "protocol",
++ "%63s", protocol, NULL);
++ if (err)
++ strcpy(protocol, "unspecified, assuming native");
++ else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_NATIVE))
++ be->blkif->blk_protocol = BLKIF_PROTOCOL_NATIVE;
++ else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_X86_32))
++ be->blkif->blk_protocol = BLKIF_PROTOCOL_X86_32;
++ else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_X86_64))
++ be->blkif->blk_protocol = BLKIF_PROTOCOL_X86_64;
++ else {
++ xenbus_dev_fatal(dev, err, "unknown fe protocol %s", protocol);
++ return -1;
++ }
++ printk(KERN_INFO
++ "blktap: ring-ref %ld, event-channel %d, protocol %d (%s)\n",
++ ring_ref, evtchn, be->blkif->blk_protocol, protocol);
++
++ /* Map the shared frame, irq etc. */
++ err = tap_blkif_map(be->blkif, ring_ref, evtchn);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "mapping ring-ref %lu port %u",
++ ring_ref, evtchn);
++ return err;
++ }
++
++ return 0;
++}
++
++
++/* ** Driver Registration ** */
++
++
++static const struct xenbus_device_id blktap_ids[] = {
++ { "tap" },
++ { "" }
++};
++
++
++static struct xenbus_driver blktap = {
++ .name = "tap",
++ .owner = THIS_MODULE,
++ .ids = blktap_ids,
++ .probe = blktap_probe,
++ .remove = blktap_remove,
++ .otherend_changed = tap_frontend_changed
++};
++
++
++void tap_blkif_xenbus_init(void)
++{
++ xenbus_register_backend(&blktap);
++}
+Index: head-2008-11-25/drivers/xen/char/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/char/Makefile 2007-07-10 09:42:30.000000000 +0200
+@@ -0,0 +1 @@
++obj-$(CONFIG_XEN_DEVMEM) := mem.o
+Index: head-2008-11-25/drivers/xen/char/mem.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/char/mem.c 2007-08-06 15:10:49.000000000 +0200
+@@ -0,0 +1,190 @@
++/*
++ * Originally from linux/drivers/char/mem.c
++ *
++ * Copyright (C) 1991, 1992 Linus Torvalds
++ *
++ * Added devfs support.
++ * Jan-11-1998, C. Scott Ananian <cananian@alumni.princeton.edu>
++ * Shared /dev/zero mmaping support, Feb 2000, Kanoj Sarcar <kanoj@sgi.com>
++ */
++
++#include <linux/mm.h>
++#include <linux/miscdevice.h>
++#include <linux/slab.h>
++#include <linux/vmalloc.h>
++#include <linux/mman.h>
++#include <linux/random.h>
++#include <linux/init.h>
++#include <linux/raw.h>
++#include <linux/tty.h>
++#include <linux/capability.h>
++#include <linux/smp_lock.h>
++#include <linux/ptrace.h>
++#include <linux/device.h>
++#include <asm/pgalloc.h>
++#include <asm/uaccess.h>
++#include <asm/io.h>
++#include <asm/hypervisor.h>
++
++static inline int uncached_access(struct file *file)
++{
++ if (file->f_flags & O_SYNC)
++ return 1;
++ /* Xen sets correct MTRR type on non-RAM for us. */
++ return 0;
++}
++
++/*
++ * This funcion reads the *physical* memory. The f_pos points directly to the
++ * memory location.
++ */
++static ssize_t read_mem(struct file * file, char __user * buf,
++ size_t count, loff_t *ppos)
++{
++ unsigned long p = *ppos, ignored;
++ ssize_t read = 0, sz;
++ void __iomem *v;
++
++ while (count > 0) {
++ /*
++ * Handle first page in case it's not aligned
++ */
++ if (-p & (PAGE_SIZE - 1))
++ sz = -p & (PAGE_SIZE - 1);
++ else
++ sz = PAGE_SIZE;
++
++ sz = min_t(unsigned long, sz, count);
++
++ v = ioremap(p, sz);
++ if (IS_ERR(v) || v == NULL) {
++ /*
++ * Some programs (e.g., dmidecode) groove off into
++ * weird RAM areas where no tables can possibly exist
++ * (because Xen will have stomped on them!). These
++ * programs get rather upset if we let them know that
++ * Xen failed their access, so we fake out a read of
++ * all zeroes.
++ */
++ if (clear_user(buf, count))
++ return -EFAULT;
++ read += count;
++ break;
++ }
++
++ ignored = copy_to_user(buf, v, sz);
++ iounmap(v);
++ if (ignored)
++ return -EFAULT;
++ buf += sz;
++ p += sz;
++ count -= sz;
++ read += sz;
++ }
++
++ *ppos += read;
++ return read;
++}
++
++static ssize_t write_mem(struct file * file, const char __user * buf,
++ size_t count, loff_t *ppos)
++{
++ unsigned long p = *ppos, ignored;
++ ssize_t written = 0, sz;
++ void __iomem *v;
++
++ while (count > 0) {
++ /*
++ * Handle first page in case it's not aligned
++ */
++ if (-p & (PAGE_SIZE - 1))
++ sz = -p & (PAGE_SIZE - 1);
++ else
++ sz = PAGE_SIZE;
++
++ sz = min_t(unsigned long, sz, count);
++
++ v = ioremap(p, sz);
++ if (v == NULL)
++ break;
++ if (IS_ERR(v)) {
++ if (written == 0)
++ return PTR_ERR(v);
++ break;
++ }
++
++ ignored = copy_from_user(v, buf, sz);
++ iounmap(v);
++ if (ignored) {
++ written += sz - ignored;
++ if (written)
++ break;
++ return -EFAULT;
++ }
++ buf += sz;
++ p += sz;
++ count -= sz;
++ written += sz;
++ }
++
++ *ppos += written;
++ return written;
++}
++
++#ifndef ARCH_HAS_DEV_MEM_MMAP_MEM
++static int xen_mmap_mem(struct file * file, struct vm_area_struct * vma)
++{
++ size_t size = vma->vm_end - vma->vm_start;
++
++ if (uncached_access(file))
++ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
++
++ /* We want to return the real error code, not EAGAIN. */
++ return direct_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
++ size, vma->vm_page_prot, DOMID_IO);
++}
++#endif
++
++/*
++ * The memory devices use the full 32/64 bits of the offset, and so we cannot
++ * check against negative addresses: they are ok. The return value is weird,
++ * though, in that case (0).
++ *
++ * also note that seeking relative to the "end of file" isn't supported:
++ * it has no meaning, so it returns -EINVAL.
++ */
++static loff_t memory_lseek(struct file * file, loff_t offset, int orig)
++{
++ loff_t ret;
++
++ mutex_lock(&file->f_dentry->d_inode->i_mutex);
++ switch (orig) {
++ case 0:
++ file->f_pos = offset;
++ ret = file->f_pos;
++ force_successful_syscall_return();
++ break;
++ case 1:
++ file->f_pos += offset;
++ ret = file->f_pos;
++ force_successful_syscall_return();
++ break;
++ default:
++ ret = -EINVAL;
++ }
++ mutex_unlock(&file->f_dentry->d_inode->i_mutex);
++ return ret;
++}
++
++static int open_mem(struct inode * inode, struct file * filp)
++{
++ return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
++}
++
++const struct file_operations mem_fops = {
++ .llseek = memory_lseek,
++ .read = read_mem,
++ .write = write_mem,
++ .mmap = xen_mmap_mem,
++ .open = open_mem,
++};
+Index: head-2008-11-25/drivers/xen/console/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/console/Makefile 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,2 @@
++
++obj-y := console.o xencons_ring.o
+Index: head-2008-11-25/drivers/xen/console/console.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/console/console.c 2007-10-15 09:39:38.000000000 +0200
+@@ -0,0 +1,731 @@
++/******************************************************************************
++ * console.c
++ *
++ * Virtual console driver.
++ *
++ * Copyright (c) 2002-2004, K A Fraser.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/errno.h>
++#include <linux/signal.h>
++#include <linux/sched.h>
++#include <linux/interrupt.h>
++#include <linux/tty.h>
++#include <linux/tty_flip.h>
++#include <linux/serial.h>
++#include <linux/major.h>
++#include <linux/ptrace.h>
++#include <linux/ioport.h>
++#include <linux/mm.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/console.h>
++#include <linux/bootmem.h>
++#include <linux/sysrq.h>
++#include <linux/screen_info.h>
++#include <linux/vt.h>
++#include <asm/io.h>
++#include <asm/irq.h>
++#include <asm/uaccess.h>
++#include <xen/interface/xen.h>
++#include <xen/interface/event_channel.h>
++#include <asm/hypervisor.h>
++#include <xen/evtchn.h>
++#include <xen/xenbus.h>
++#include <xen/xencons.h>
++
++/*
++ * Modes:
++ * 'xencons=off' [XC_OFF]: Console is disabled.
++ * 'xencons=tty' [XC_TTY]: Console attached to '/dev/tty[0-9]+'.
++ * 'xencons=ttyS' [XC_SERIAL]: Console attached to '/dev/ttyS[0-9]+'.
++ * 'xencons=xvc' [XC_XVC]: Console attached to '/dev/xvc0'.
++ * default: XC_XVC
++ *
++ * NB. In mode XC_TTY, we create dummy consoles for tty2-63. This suppresses
++ * warnings from standard distro startup scripts.
++ */
++static enum {
++ XC_OFF, XC_TTY, XC_SERIAL, XC_XVC
++} xc_mode = XC_XVC;
++static int xc_num = -1;
++
++/* /dev/xvc0 device number allocated by lanana.org. */
++#define XEN_XVC_MAJOR 204
++#define XEN_XVC_MINOR 191
++
++#ifdef CONFIG_MAGIC_SYSRQ
++static unsigned long sysrq_requested;
++extern int sysrq_enabled;
++#endif
++
++static int __init xencons_setup(char *str)
++{
++ char *q;
++ int n;
++ extern int console_use_vt;
++
++ console_use_vt = 1;
++ if (!strncmp(str, "ttyS", 4)) {
++ xc_mode = XC_SERIAL;
++ str += 4;
++ } else if (!strncmp(str, "tty", 3)) {
++ xc_mode = XC_TTY;
++ str += 3;
++ console_use_vt = 0;
++ } else if (!strncmp(str, "xvc", 3)) {
++ xc_mode = XC_XVC;
++ str += 3;
++ } else if (!strncmp(str, "off", 3)) {
++ xc_mode = XC_OFF;
++ str += 3;
++ }
++
++ n = simple_strtol(str, &q, 10);
++ if (q != str)
++ xc_num = n;
++
++ return 1;
++}
++__setup("xencons=", xencons_setup);
++
++/* The kernel and user-land drivers share a common transmit buffer. */
++static unsigned int wbuf_size = 4096;
++#define WBUF_MASK(_i) ((_i)&(wbuf_size-1))
++static char *wbuf;
++static unsigned int wc, wp; /* write_cons, write_prod */
++
++static int __init xencons_bufsz_setup(char *str)
++{
++ unsigned int goal;
++ goal = simple_strtoul(str, NULL, 0);
++ if (goal) {
++ goal = roundup_pow_of_two(goal);
++ if (wbuf_size < goal)
++ wbuf_size = goal;
++ }
++ return 1;
++}
++__setup("xencons_bufsz=", xencons_bufsz_setup);
++
++/* This lock protects accesses to the common transmit buffer. */
++static DEFINE_SPINLOCK(xencons_lock);
++
++/* Common transmit-kick routine. */
++static void __xencons_tx_flush(void);
++
++static struct tty_driver *xencons_driver;
++
++/******************** Kernel console driver ********************************/
++
++static void kcons_write(struct console *c, const char *s, unsigned int count)
++{
++ int i = 0;
++ unsigned long flags;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++
++ while (i < count) {
++ for (; i < count; i++) {
++ if ((wp - wc) >= (wbuf_size - 1))
++ break;
++ if ((wbuf[WBUF_MASK(wp++)] = s[i]) == '\n')
++ wbuf[WBUF_MASK(wp++)] = '\r';
++ }
++
++ __xencons_tx_flush();
++ }
++
++ spin_unlock_irqrestore(&xencons_lock, flags);
++}
++
++static void kcons_write_dom0(struct console *c, const char *s, unsigned int count)
++{
++
++ while (count > 0) {
++ int rc;
++ rc = HYPERVISOR_console_io( CONSOLEIO_write, count, (char *)s);
++ if (rc <= 0)
++ break;
++ count -= rc;
++ s += rc;
++ }
++}
++
++static struct tty_driver *kcons_device(struct console *c, int *index)
++{
++ *index = 0;
++ return xencons_driver;
++}
++
++static struct console kcons_info = {
++ .device = kcons_device,
++ .flags = CON_PRINTBUFFER | CON_ENABLED,
++ .index = -1,
++};
++
++static int __init xen_console_init(void)
++{
++ if (!is_running_on_xen())
++ goto out;
++
++ if (is_initial_xendomain()) {
++ kcons_info.write = kcons_write_dom0;
++ } else {
++ if (!xen_start_info->console.domU.evtchn)
++ goto out;
++ kcons_info.write = kcons_write;
++ }
++
++ switch (xc_mode) {
++ case XC_XVC:
++ strcpy(kcons_info.name, "xvc");
++ if (xc_num == -1)
++ xc_num = 0;
++ break;
++
++ case XC_SERIAL:
++ strcpy(kcons_info.name, "ttyS");
++ if (xc_num == -1)
++ xc_num = 0;
++ break;
++
++ case XC_TTY:
++ strcpy(kcons_info.name, "tty");
++ if (xc_num == -1)
++ xc_num = 1;
++ break;
++
++ default:
++ goto out;
++ }
++
++ wbuf = alloc_bootmem(wbuf_size);
++
++ register_console(&kcons_info);
++
++ out:
++ return 0;
++}
++console_initcall(xen_console_init);
++
++/*** Useful function for console debugging -- goes straight to Xen. ***/
++asmlinkage int xprintk(const char *fmt, ...)
++{
++ va_list args;
++ int printk_len;
++ static char printk_buf[1024];
++
++ /* Emit the output into the temporary buffer */
++ va_start(args, fmt);
++ printk_len = vsnprintf(printk_buf, sizeof(printk_buf), fmt, args);
++ va_end(args);
++
++ /* Send the processed output directly to Xen. */
++ kcons_write_dom0(NULL, printk_buf, printk_len);
++
++ return 0;
++}
++
++/*** Forcibly flush console data before dying. ***/
++void xencons_force_flush(void)
++{
++ int sz;
++
++ /* Emergency console is synchronous, so there's nothing to flush. */
++ if (!is_running_on_xen() ||
++ is_initial_xendomain() ||
++ !xen_start_info->console.domU.evtchn)
++ return;
++
++ /* Spin until console data is flushed through to the daemon. */
++ while (wc != wp) {
++ int sent = 0;
++ if ((sz = wp - wc) == 0)
++ continue;
++ sent = xencons_ring_send(&wbuf[WBUF_MASK(wc)], sz);
++ if (sent > 0)
++ wc += sent;
++ }
++}
++
++
++void __init dom0_init_screen_info(const struct dom0_vga_console_info *info, size_t size)
++{
++ /* This is drawn from a dump from vgacon:startup in
++ * standard Linux. */
++ screen_info.orig_video_mode = 3;
++ screen_info.orig_video_isVGA = 1;
++ screen_info.orig_video_lines = 25;
++ screen_info.orig_video_cols = 80;
++ screen_info.orig_video_ega_bx = 3;
++ screen_info.orig_video_points = 16;
++ screen_info.orig_y = screen_info.orig_video_lines - 1;
++
++ switch (info->video_type) {
++ case XEN_VGATYPE_TEXT_MODE_3:
++ if (size < offsetof(struct dom0_vga_console_info, u.text_mode_3)
++ + sizeof(info->u.text_mode_3))
++ break;
++ screen_info.orig_video_lines = info->u.text_mode_3.rows;
++ screen_info.orig_video_cols = info->u.text_mode_3.columns;
++ screen_info.orig_x = info->u.text_mode_3.cursor_x;
++ screen_info.orig_y = info->u.text_mode_3.cursor_y;
++ screen_info.orig_video_points =
++ info->u.text_mode_3.font_height;
++ break;
++
++ case XEN_VGATYPE_VESA_LFB:
++ if (size < offsetof(struct dom0_vga_console_info,
++ u.vesa_lfb.gbl_caps))
++ break;
++ screen_info.orig_video_isVGA = VIDEO_TYPE_VLFB;
++ screen_info.lfb_width = info->u.vesa_lfb.width;
++ screen_info.lfb_height = info->u.vesa_lfb.height;
++ screen_info.lfb_depth = info->u.vesa_lfb.bits_per_pixel;
++ screen_info.lfb_base = info->u.vesa_lfb.lfb_base;
++ screen_info.lfb_size = info->u.vesa_lfb.lfb_size;
++ screen_info.lfb_linelength = info->u.vesa_lfb.bytes_per_line;
++ screen_info.red_size = info->u.vesa_lfb.red_size;
++ screen_info.red_pos = info->u.vesa_lfb.red_pos;
++ screen_info.green_size = info->u.vesa_lfb.green_size;
++ screen_info.green_pos = info->u.vesa_lfb.green_pos;
++ screen_info.blue_size = info->u.vesa_lfb.blue_size;
++ screen_info.blue_pos = info->u.vesa_lfb.blue_pos;
++ screen_info.rsvd_size = info->u.vesa_lfb.rsvd_size;
++ screen_info.rsvd_pos = info->u.vesa_lfb.rsvd_pos;
++ if (size >= offsetof(struct dom0_vga_console_info,
++ u.vesa_lfb.gbl_caps)
++ + sizeof(info->u.vesa_lfb.gbl_caps))
++ screen_info.capabilities = info->u.vesa_lfb.gbl_caps;
++ if (size >= offsetof(struct dom0_vga_console_info,
++ u.vesa_lfb.mode_attrs)
++ + sizeof(info->u.vesa_lfb.mode_attrs))
++ screen_info.vesa_attributes = info->u.vesa_lfb.mode_attrs;
++ break;
++ }
++}
++
++
++/******************** User-space console driver (/dev/console) ************/
++
++#define DRV(_d) (_d)
++#define DUMMY_TTY(_tty) ((xc_mode == XC_TTY) && \
++ ((_tty)->index != (xc_num - 1)))
++
++static struct termios *xencons_termios[MAX_NR_CONSOLES];
++static struct termios *xencons_termios_locked[MAX_NR_CONSOLES];
++static struct tty_struct *xencons_tty;
++static int xencons_priv_irq;
++static char x_char;
++
++void xencons_rx(char *buf, unsigned len, struct pt_regs *regs)
++{
++ int i;
++ unsigned long flags;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++ if (xencons_tty == NULL)
++ goto out;
++
++ for (i = 0; i < len; i++) {
++#ifdef CONFIG_MAGIC_SYSRQ
++ if (sysrq_enabled) {
++ if (buf[i] == '\x0f') { /* ^O */
++ if (!sysrq_requested) {
++ sysrq_requested = jiffies;
++ continue; /* don't print sysrq key */
++ }
++ sysrq_requested = 0;
++ } else if (sysrq_requested) {
++ unsigned long sysrq_timeout =
++ sysrq_requested + HZ*2;
++ sysrq_requested = 0;
++ if (time_before(jiffies, sysrq_timeout)) {
++ spin_unlock_irqrestore(
++ &xencons_lock, flags);
++ handle_sysrq(
++ buf[i], regs, xencons_tty);
++ spin_lock_irqsave(
++ &xencons_lock, flags);
++ continue;
++ }
++ }
++ }
++#endif
++ tty_insert_flip_char(xencons_tty, buf[i], 0);
++ }
++ tty_flip_buffer_push(xencons_tty);
++
++ out:
++ spin_unlock_irqrestore(&xencons_lock, flags);
++}
++
++static void __xencons_tx_flush(void)
++{
++ int sent, sz, work_done = 0;
++
++ if (x_char) {
++ if (is_initial_xendomain())
++ kcons_write_dom0(NULL, &x_char, 1);
++ else
++ while (x_char)
++ if (xencons_ring_send(&x_char, 1) == 1)
++ break;
++ x_char = 0;
++ work_done = 1;
++ }
++
++ while (wc != wp) {
++ sz = wp - wc;
++ if (sz > (wbuf_size - WBUF_MASK(wc)))
++ sz = wbuf_size - WBUF_MASK(wc);
++ if (is_initial_xendomain()) {
++ kcons_write_dom0(NULL, &wbuf[WBUF_MASK(wc)], sz);
++ wc += sz;
++ } else {
++ sent = xencons_ring_send(&wbuf[WBUF_MASK(wc)], sz);
++ if (sent == 0)
++ break;
++ wc += sent;
++ }
++ work_done = 1;
++ }
++
++ if (work_done && (xencons_tty != NULL)) {
++ wake_up_interruptible(&xencons_tty->write_wait);
++ if ((xencons_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
++ (xencons_tty->ldisc.write_wakeup != NULL))
++ (xencons_tty->ldisc.write_wakeup)(xencons_tty);
++ }
++}
++
++void xencons_tx(void)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++ __xencons_tx_flush();
++ spin_unlock_irqrestore(&xencons_lock, flags);
++}
++
++/* Privileged receive callback and transmit kicker. */
++static irqreturn_t xencons_priv_interrupt(int irq, void *dev_id,
++ struct pt_regs *regs)
++{
++ static char rbuf[16];
++ int l;
++
++ while ((l = HYPERVISOR_console_io(CONSOLEIO_read, 16, rbuf)) > 0)
++ xencons_rx(rbuf, l, regs);
++
++ xencons_tx();
++
++ return IRQ_HANDLED;
++}
++
++static int xencons_write_room(struct tty_struct *tty)
++{
++ return wbuf_size - (wp - wc);
++}
++
++static int xencons_chars_in_buffer(struct tty_struct *tty)
++{
++ return wp - wc;
++}
++
++static void xencons_send_xchar(struct tty_struct *tty, char ch)
++{
++ unsigned long flags;
++
++ if (DUMMY_TTY(tty))
++ return;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++ x_char = ch;
++ __xencons_tx_flush();
++ spin_unlock_irqrestore(&xencons_lock, flags);
++}
++
++static void xencons_throttle(struct tty_struct *tty)
++{
++ if (DUMMY_TTY(tty))
++ return;
++
++ if (I_IXOFF(tty))
++ xencons_send_xchar(tty, STOP_CHAR(tty));
++}
++
++static void xencons_unthrottle(struct tty_struct *tty)
++{
++ if (DUMMY_TTY(tty))
++ return;
++
++ if (I_IXOFF(tty)) {
++ if (x_char != 0)
++ x_char = 0;
++ else
++ xencons_send_xchar(tty, START_CHAR(tty));
++ }
++}
++
++static void xencons_flush_buffer(struct tty_struct *tty)
++{
++ unsigned long flags;
++
++ if (DUMMY_TTY(tty))
++ return;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++ wc = wp = 0;
++ spin_unlock_irqrestore(&xencons_lock, flags);
++}
++
++static inline int __xencons_put_char(int ch)
++{
++ char _ch = (char)ch;
++ if ((wp - wc) == wbuf_size)
++ return 0;
++ wbuf[WBUF_MASK(wp++)] = _ch;
++ return 1;
++}
++
++static int xencons_write(
++ struct tty_struct *tty,
++ const unsigned char *buf,
++ int count)
++{
++ int i;
++ unsigned long flags;
++
++ if (DUMMY_TTY(tty))
++ return count;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++
++ for (i = 0; i < count; i++)
++ if (!__xencons_put_char(buf[i]))
++ break;
++
++ if (i != 0)
++ __xencons_tx_flush();
++
++ spin_unlock_irqrestore(&xencons_lock, flags);
++
++ return i;
++}
++
++static void xencons_put_char(struct tty_struct *tty, u_char ch)
++{
++ unsigned long flags;
++
++ if (DUMMY_TTY(tty))
++ return;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++ (void)__xencons_put_char(ch);
++ spin_unlock_irqrestore(&xencons_lock, flags);
++}
++
++static void xencons_flush_chars(struct tty_struct *tty)
++{
++ unsigned long flags;
++
++ if (DUMMY_TTY(tty))
++ return;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++ __xencons_tx_flush();
++ spin_unlock_irqrestore(&xencons_lock, flags);
++}
++
++static void xencons_wait_until_sent(struct tty_struct *tty, int timeout)
++{
++ unsigned long orig_jiffies = jiffies;
++
++ if (DUMMY_TTY(tty))
++ return;
++
++ while (DRV(tty->driver)->chars_in_buffer(tty)) {
++ set_current_state(TASK_INTERRUPTIBLE);
++ schedule_timeout(1);
++ if (signal_pending(current))
++ break;
++ if (timeout && time_after(jiffies, orig_jiffies + timeout))
++ break;
++ }
++
++ set_current_state(TASK_RUNNING);
++}
++
++static int xencons_open(struct tty_struct *tty, struct file *filp)
++{
++ unsigned long flags;
++
++ if (DUMMY_TTY(tty))
++ return 0;
++
++ spin_lock_irqsave(&xencons_lock, flags);
++ tty->driver_data = NULL;
++ if (xencons_tty == NULL)
++ xencons_tty = tty;
++ __xencons_tx_flush();
++ spin_unlock_irqrestore(&xencons_lock, flags);
++
++ return 0;
++}
++
++static void xencons_close(struct tty_struct *tty, struct file *filp)
++{
++ unsigned long flags;
++
++ if (DUMMY_TTY(tty))
++ return;
++
++ mutex_lock(&tty_mutex);
++
++ if (tty->count != 1) {
++ mutex_unlock(&tty_mutex);
++ return;
++ }
++
++ /* Prevent other threads from re-opening this tty. */
++ set_bit(TTY_CLOSING, &tty->flags);
++ mutex_unlock(&tty_mutex);
++
++ tty->closing = 1;
++ tty_wait_until_sent(tty, 0);
++ if (DRV(tty->driver)->flush_buffer != NULL)
++ DRV(tty->driver)->flush_buffer(tty);
++ if (tty->ldisc.flush_buffer != NULL)
++ tty->ldisc.flush_buffer(tty);
++ tty->closing = 0;
++ spin_lock_irqsave(&xencons_lock, flags);
++ xencons_tty = NULL;
++ spin_unlock_irqrestore(&xencons_lock, flags);
++}
++
++static struct tty_operations xencons_ops = {
++ .open = xencons_open,
++ .close = xencons_close,
++ .write = xencons_write,
++ .write_room = xencons_write_room,
++ .put_char = xencons_put_char,
++ .flush_chars = xencons_flush_chars,
++ .chars_in_buffer = xencons_chars_in_buffer,
++ .send_xchar = xencons_send_xchar,
++ .flush_buffer = xencons_flush_buffer,
++ .throttle = xencons_throttle,
++ .unthrottle = xencons_unthrottle,
++ .wait_until_sent = xencons_wait_until_sent,
++};
++
++static int __init xencons_init(void)
++{
++ int rc;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ if (xc_mode == XC_OFF)
++ return 0;
++
++ if (!is_initial_xendomain()) {
++ rc = xencons_ring_init();
++ if (rc)
++ return rc;
++ }
++
++ xencons_driver = alloc_tty_driver((xc_mode == XC_TTY) ?
++ MAX_NR_CONSOLES : 1);
++ if (xencons_driver == NULL)
++ return -ENOMEM;
++
++ DRV(xencons_driver)->name = "xencons";
++ DRV(xencons_driver)->major = TTY_MAJOR;
++ DRV(xencons_driver)->type = TTY_DRIVER_TYPE_SERIAL;
++ DRV(xencons_driver)->subtype = SERIAL_TYPE_NORMAL;
++ DRV(xencons_driver)->init_termios = tty_std_termios;
++ DRV(xencons_driver)->flags =
++ TTY_DRIVER_REAL_RAW |
++ TTY_DRIVER_RESET_TERMIOS;
++ DRV(xencons_driver)->termios = xencons_termios;
++ DRV(xencons_driver)->termios_locked = xencons_termios_locked;
++
++ switch (xc_mode) {
++ case XC_XVC:
++ DRV(xencons_driver)->name = "xvc";
++ DRV(xencons_driver)->major = XEN_XVC_MAJOR;
++ DRV(xencons_driver)->minor_start = XEN_XVC_MINOR;
++ DRV(xencons_driver)->name_base = xc_num;
++ break;
++ case XC_SERIAL:
++ DRV(xencons_driver)->name = "ttyS";
++ DRV(xencons_driver)->minor_start = 64 + xc_num;
++ DRV(xencons_driver)->name_base = xc_num;
++ break;
++ default:
++ DRV(xencons_driver)->name = "tty";
++ DRV(xencons_driver)->minor_start = 1;
++ DRV(xencons_driver)->name_base = 1;
++ break;
++ }
++
++ tty_set_operations(xencons_driver, &xencons_ops);
++
++ if ((rc = tty_register_driver(DRV(xencons_driver))) != 0) {
++ printk("WARNING: Failed to register Xen virtual "
++ "console driver as '%s%d'\n",
++ DRV(xencons_driver)->name,
++ DRV(xencons_driver)->name_base);
++ put_tty_driver(xencons_driver);
++ xencons_driver = NULL;
++ return rc;
++ }
++
++ if (is_initial_xendomain()) {
++ xencons_priv_irq = bind_virq_to_irqhandler(
++ VIRQ_CONSOLE,
++ 0,
++ xencons_priv_interrupt,
++ 0,
++ "console",
++ NULL);
++ BUG_ON(xencons_priv_irq < 0);
++ }
++
++ printk("Xen virtual console successfully installed as %s%d\n",
++ DRV(xencons_driver)->name, xc_num);
++
++ return 0;
++}
++
++module_init(xencons_init);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/console/xencons_ring.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/console/xencons_ring.c 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,143 @@
++/*
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/errno.h>
++#include <linux/signal.h>
++#include <linux/sched.h>
++#include <linux/interrupt.h>
++#include <linux/tty.h>
++#include <linux/tty_flip.h>
++#include <linux/serial.h>
++#include <linux/major.h>
++#include <linux/ptrace.h>
++#include <linux/ioport.h>
++#include <linux/mm.h>
++#include <linux/slab.h>
++
++#include <asm/hypervisor.h>
++#include <xen/evtchn.h>
++#include <xen/xencons.h>
++#include <linux/wait.h>
++#include <linux/interrupt.h>
++#include <linux/sched.h>
++#include <linux/err.h>
++#include <xen/interface/io/console.h>
++
++static int xencons_irq;
++
++static inline struct xencons_interface *xencons_interface(void)
++{
++ return mfn_to_virt(xen_start_info->console.domU.mfn);
++}
++
++static inline void notify_daemon(void)
++{
++ /* Use evtchn: this is called early, before irq is set up. */
++ notify_remote_via_evtchn(xen_start_info->console.domU.evtchn);
++}
++
++int xencons_ring_send(const char *data, unsigned len)
++{
++ int sent = 0;
++ struct xencons_interface *intf = xencons_interface();
++ XENCONS_RING_IDX cons, prod;
++
++ cons = intf->out_cons;
++ prod = intf->out_prod;
++ mb();
++ BUG_ON((prod - cons) > sizeof(intf->out));
++
++ while ((sent < len) && ((prod - cons) < sizeof(intf->out)))
++ intf->out[MASK_XENCONS_IDX(prod++, intf->out)] = data[sent++];
++
++ wmb();
++ intf->out_prod = prod;
++
++ notify_daemon();
++
++ return sent;
++}
++
++static irqreturn_t handle_input(int irq, void *unused, struct pt_regs *regs)
++{
++ struct xencons_interface *intf = xencons_interface();
++ XENCONS_RING_IDX cons, prod;
++
++ cons = intf->in_cons;
++ prod = intf->in_prod;
++ mb();
++ BUG_ON((prod - cons) > sizeof(intf->in));
++
++ while (cons != prod) {
++ xencons_rx(intf->in+MASK_XENCONS_IDX(cons,intf->in), 1, regs);
++ cons++;
++ }
++
++ mb();
++ intf->in_cons = cons;
++
++ notify_daemon();
++
++ xencons_tx();
++
++ return IRQ_HANDLED;
++}
++
++int xencons_ring_init(void)
++{
++ int irq;
++
++ if (xencons_irq)
++ unbind_from_irqhandler(xencons_irq, NULL);
++ xencons_irq = 0;
++
++ if (!is_running_on_xen() ||
++ is_initial_xendomain() ||
++ !xen_start_info->console.domU.evtchn)
++ return -ENODEV;
++
++ irq = bind_caller_port_to_irqhandler(
++ xen_start_info->console.domU.evtchn,
++ handle_input, 0, "xencons", NULL);
++ if (irq < 0) {
++ printk(KERN_ERR "XEN console request irq failed %i\n", irq);
++ return irq;
++ }
++
++ xencons_irq = irq;
++
++ /* In case we have in-flight data after save/restore... */
++ notify_daemon();
++
++ return 0;
++}
++
++void xencons_resume(void)
++{
++ (void)xencons_ring_init();
++}
+Index: head-2008-11-25/drivers/xen/core/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/Makefile 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,14 @@
++#
++# Makefile for the linux kernel.
++#
++
++obj-y := evtchn.o gnttab.o features.o reboot.o machine_reboot.o firmware.o
++
++obj-$(CONFIG_PCI) += pci.o
++obj-$(CONFIG_PROC_FS) += xen_proc.o
++obj-$(CONFIG_SYS_HYPERVISOR) += hypervisor_sysfs.o
++obj-$(CONFIG_HOTPLUG_CPU) += cpu_hotplug.o
++obj-$(CONFIG_XEN_SYSFS) += xen_sysfs.o
++obj-$(CONFIG_XEN_SMPBOOT) += smpboot.o
++obj-$(CONFIG_KEXEC) += machine_kexec.o
++obj-$(CONFIG_XEN_XENCOMM) += xencomm.o
+Index: head-2008-11-25/drivers/xen/core/cpu_hotplug.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/cpu_hotplug.c 2008-01-21 11:15:26.000000000 +0100
+@@ -0,0 +1,173 @@
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/notifier.h>
++#include <linux/cpu.h>
++#include <xen/cpu_hotplug.h>
++#include <xen/xenbus.h>
++
++/*
++ * Set of CPUs that remote admin software will allow us to bring online.
++ * Notified to us via xenbus.
++ */
++static cpumask_t xenbus_allowed_cpumask;
++
++/* Set of CPUs that local admin will allow us to bring online. */
++static cpumask_t local_allowed_cpumask = CPU_MASK_ALL;
++
++static int local_cpu_hotplug_request(void)
++{
++ /*
++ * We assume a CPU hotplug request comes from local admin if it is made
++ * via a userspace process (i.e., one with a real mm_struct).
++ */
++ return (current->mm != NULL);
++}
++
++static void vcpu_hotplug(unsigned int cpu)
++{
++ int err;
++ char dir[32], state[32];
++
++ if ((cpu >= NR_CPUS) || !cpu_possible(cpu))
++ return;
++
++ sprintf(dir, "cpu/%u", cpu);
++ err = xenbus_scanf(XBT_NIL, dir, "availability", "%s", state);
++ if (err != 1) {
++ printk(KERN_ERR "XENBUS: Unable to read cpu state\n");
++ return;
++ }
++
++ if (strcmp(state, "online") == 0) {
++ cpu_set(cpu, xenbus_allowed_cpumask);
++ (void)cpu_up(cpu);
++ } else if (strcmp(state, "offline") == 0) {
++ cpu_clear(cpu, xenbus_allowed_cpumask);
++ (void)cpu_down(cpu);
++ } else {
++ printk(KERN_ERR "XENBUS: unknown state(%s) on CPU%d\n",
++ state, cpu);
++ }
++}
++
++static void handle_vcpu_hotplug_event(
++ struct xenbus_watch *watch, const char **vec, unsigned int len)
++{
++ unsigned int cpu;
++ char *cpustr;
++ const char *node = vec[XS_WATCH_PATH];
++
++ if ((cpustr = strstr(node, "cpu/")) != NULL) {
++ sscanf(cpustr, "cpu/%u", &cpu);
++ vcpu_hotplug(cpu);
++ }
++}
++
++static int smpboot_cpu_notify(struct notifier_block *notifier,
++ unsigned long action, void *hcpu)
++{
++ unsigned int cpu = (long)hcpu;
++
++ /*
++ * We do this in a callback notifier rather than __cpu_disable()
++ * because local_cpu_hotplug_request() does not work in the latter
++ * as it's always executed from within a stopmachine kthread.
++ */
++ if ((action == CPU_DOWN_PREPARE) && local_cpu_hotplug_request())
++ cpu_clear(cpu, local_allowed_cpumask);
++
++ return NOTIFY_OK;
++}
++
++static int setup_cpu_watcher(struct notifier_block *notifier,
++ unsigned long event, void *data)
++{
++ unsigned int i;
++
++ static struct xenbus_watch cpu_watch = {
++ .node = "cpu",
++ .callback = handle_vcpu_hotplug_event,
++ .flags = XBWF_new_thread };
++ (void)register_xenbus_watch(&cpu_watch);
++
++ if (!is_initial_xendomain()) {
++ for_each_possible_cpu(i)
++ vcpu_hotplug(i);
++ printk(KERN_INFO "Brought up %ld CPUs\n",
++ (long)num_online_cpus());
++ }
++
++ return NOTIFY_DONE;
++}
++
++static int __init setup_vcpu_hotplug_event(void)
++{
++ static struct notifier_block hotplug_cpu = {
++ .notifier_call = smpboot_cpu_notify };
++ static struct notifier_block xsn_cpu = {
++ .notifier_call = setup_cpu_watcher };
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ register_cpu_notifier(&hotplug_cpu);
++ register_xenstore_notifier(&xsn_cpu);
++
++ return 0;
++}
++
++arch_initcall(setup_vcpu_hotplug_event);
++
++int smp_suspend(void)
++{
++ unsigned int cpu;
++ int err;
++
++ for_each_online_cpu(cpu) {
++ if (cpu == 0)
++ continue;
++ err = cpu_down(cpu);
++ if (err) {
++ printk(KERN_CRIT "Failed to take all CPUs "
++ "down: %d.\n", err);
++ for_each_possible_cpu(cpu)
++ vcpu_hotplug(cpu);
++ return err;
++ }
++ }
++
++ return 0;
++}
++
++void smp_resume(void)
++{
++ unsigned int cpu;
++
++ for_each_possible_cpu(cpu)
++ vcpu_hotplug(cpu);
++}
++
++int cpu_up_check(unsigned int cpu)
++{
++ int rc = 0;
++
++ if (local_cpu_hotplug_request()) {
++ cpu_set(cpu, local_allowed_cpumask);
++ if (!cpu_isset(cpu, xenbus_allowed_cpumask)) {
++ printk("%s: attempt to bring up CPU %u disallowed by "
++ "remote admin.\n", __FUNCTION__, cpu);
++ rc = -EBUSY;
++ }
++ } else if (!cpu_isset(cpu, local_allowed_cpumask) ||
++ !cpu_isset(cpu, xenbus_allowed_cpumask)) {
++ rc = -EBUSY;
++ }
++
++ return rc;
++}
++
++void init_xenbus_allowed_cpumask(void)
++{
++ xenbus_allowed_cpumask = cpu_present_map;
++}
+Index: head-2008-11-25/drivers/xen/core/evtchn.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/evtchn.c 2008-11-10 11:44:21.000000000 +0100
+@@ -0,0 +1,1140 @@
++/******************************************************************************
++ * evtchn.c
++ *
++ * Communication via Xen event channels.
++ *
++ * Copyright (c) 2002-2005, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/module.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/sched.h>
++#include <linux/kernel_stat.h>
++#include <linux/version.h>
++#include <asm/atomic.h>
++#include <asm/system.h>
++#include <asm/ptrace.h>
++#include <asm/synch_bitops.h>
++#include <xen/evtchn.h>
++#include <xen/interface/event_channel.h>
++#include <xen/interface/physdev.h>
++#include <asm/hypervisor.h>
++#include <linux/mc146818rtc.h> /* RTC_IRQ */
++
++/*
++ * This lock protects updates to the following mapping and reference-count
++ * arrays. The lock does not need to be acquired to read the mapping tables.
++ */
++static DEFINE_SPINLOCK(irq_mapping_update_lock);
++
++/* IRQ <-> event-channel mappings. */
++static int evtchn_to_irq[NR_EVENT_CHANNELS] = {
++ [0 ... NR_EVENT_CHANNELS-1] = -1 };
++
++/* Packed IRQ information: binding type, sub-type index, and event channel. */
++static u32 irq_info[NR_IRQS];
++
++/* Binding types. */
++enum {
++ IRQT_UNBOUND,
++ IRQT_PIRQ,
++ IRQT_VIRQ,
++ IRQT_IPI,
++ IRQT_LOCAL_PORT,
++ IRQT_CALLER_PORT,
++ _IRQT_COUNT
++};
++
++#define _IRQT_BITS 4
++#define _EVTCHN_BITS 12
++#define _INDEX_BITS (32 - _IRQT_BITS - _EVTCHN_BITS)
++
++/* Constructor for packed IRQ information. */
++static inline u32 mk_irq_info(u32 type, u32 index, u32 evtchn)
++{
++ BUILD_BUG_ON(_IRQT_COUNT > (1U << _IRQT_BITS));
++
++ BUILD_BUG_ON(NR_PIRQS > (1U << _INDEX_BITS));
++ BUILD_BUG_ON(NR_VIRQS > (1U << _INDEX_BITS));
++ BUILD_BUG_ON(NR_IPIS > (1U << _INDEX_BITS));
++ BUG_ON(index >> _INDEX_BITS);
++
++ BUILD_BUG_ON(NR_EVENT_CHANNELS > (1U << _EVTCHN_BITS));
++
++ return ((type << (32 - _IRQT_BITS)) | (index << _EVTCHN_BITS) | evtchn);
++}
++
++/* Convenient shorthand for packed representation of an unbound IRQ. */
++#define IRQ_UNBOUND mk_irq_info(IRQT_UNBOUND, 0, 0)
++
++/*
++ * Accessors for packed IRQ information.
++ */
++
++static inline unsigned int evtchn_from_irq(int irq)
++{
++ return irq_info[irq] & ((1U << _EVTCHN_BITS) - 1);
++}
++
++static inline unsigned int index_from_irq(int irq)
++{
++ return (irq_info[irq] >> _EVTCHN_BITS) & ((1U << _INDEX_BITS) - 1);
++}
++
++static inline unsigned int type_from_irq(int irq)
++{
++ return irq_info[irq] >> (32 - _IRQT_BITS);
++}
++
++/* IRQ <-> VIRQ mapping. */
++DEFINE_PER_CPU(int, virq_to_irq[NR_VIRQS]) = {[0 ... NR_VIRQS-1] = -1};
++
++/* IRQ <-> IPI mapping. */
++#ifndef NR_IPIS
++#define NR_IPIS 1
++#endif
++DEFINE_PER_CPU(int, ipi_to_irq[NR_IPIS]) = {[0 ... NR_IPIS-1] = -1};
++
++/* Reference counts for bindings to IRQs. */
++static int irq_bindcount[NR_IRQS];
++
++/* Bitmap indicating which PIRQs require Xen to be notified on unmask. */
++static DECLARE_BITMAP(pirq_needs_eoi, NR_PIRQS);
++
++#ifdef CONFIG_SMP
++
++static u8 cpu_evtchn[NR_EVENT_CHANNELS];
++static unsigned long cpu_evtchn_mask[NR_CPUS][NR_EVENT_CHANNELS/BITS_PER_LONG];
++
++static inline unsigned long active_evtchns(unsigned int cpu, shared_info_t *sh,
++ unsigned int idx)
++{
++ return (sh->evtchn_pending[idx] &
++ cpu_evtchn_mask[cpu][idx] &
++ ~sh->evtchn_mask[idx]);
++}
++
++static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++ int irq = evtchn_to_irq[chn];
++
++ BUG_ON(!test_bit(chn, s->evtchn_mask));
++
++ if (irq != -1)
++ set_native_irq_info(irq, cpumask_of_cpu(cpu));
++
++ clear_bit(chn, (unsigned long *)cpu_evtchn_mask[cpu_evtchn[chn]]);
++ set_bit(chn, (unsigned long *)cpu_evtchn_mask[cpu]);
++ cpu_evtchn[chn] = cpu;
++}
++
++static void init_evtchn_cpu_bindings(void)
++{
++ int i;
++
++ /* By default all event channels notify CPU#0. */
++ for (i = 0; i < NR_IRQS; i++)
++ set_native_irq_info(i, cpumask_of_cpu(0));
++
++ memset(cpu_evtchn, 0, sizeof(cpu_evtchn));
++ memset(cpu_evtchn_mask[0], ~0, sizeof(cpu_evtchn_mask[0]));
++}
++
++static inline unsigned int cpu_from_evtchn(unsigned int evtchn)
++{
++ return cpu_evtchn[evtchn];
++}
++
++#else
++
++static inline unsigned long active_evtchns(unsigned int cpu, shared_info_t *sh,
++ unsigned int idx)
++{
++ return (sh->evtchn_pending[idx] & ~sh->evtchn_mask[idx]);
++}
++
++static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu)
++{
++}
++
++static void init_evtchn_cpu_bindings(void)
++{
++}
++
++static inline unsigned int cpu_from_evtchn(unsigned int evtchn)
++{
++ return 0;
++}
++
++#endif
++
++/* Upcall to generic IRQ layer. */
++#ifdef CONFIG_X86
++extern fastcall unsigned int do_IRQ(struct pt_regs *regs);
++void __init xen_init_IRQ(void);
++void __init init_IRQ(void)
++{
++ irq_ctx_init(0);
++ xen_init_IRQ();
++}
++#if defined (__i386__)
++static inline void exit_idle(void) {}
++#define IRQ_REG orig_eax
++#elif defined (__x86_64__)
++#include <asm/idle.h>
++#define IRQ_REG orig_rax
++#endif
++#define do_IRQ(irq, regs) do { \
++ (regs)->IRQ_REG = ~(irq); \
++ do_IRQ((regs)); \
++} while (0)
++#endif
++
++/* Xen will never allocate port zero for any purpose. */
++#define VALID_EVTCHN(chn) ((chn) != 0)
++
++/*
++ * Force a proper event-channel callback from Xen after clearing the
++ * callback mask. We do this in a very simple manner, by making a call
++ * down into Xen. The pending flag will be checked by Xen on return.
++ */
++void force_evtchn_callback(void)
++{
++ VOID(HYPERVISOR_xen_version(0, NULL));
++}
++/* Not a GPL symbol: used in ubiquitous macros, so too restrictive. */
++EXPORT_SYMBOL(force_evtchn_callback);
++
++static DEFINE_PER_CPU(unsigned int, upcall_count) = { 0 };
++static DEFINE_PER_CPU(unsigned int, last_processed_l1i) = { BITS_PER_LONG - 1 };
++static DEFINE_PER_CPU(unsigned int, last_processed_l2i) = { BITS_PER_LONG - 1 };
++
++/* NB. Interrupts are disabled on entry. */
++asmlinkage void evtchn_do_upcall(struct pt_regs *regs)
++{
++ unsigned long l1, l2;
++ unsigned long masked_l1, masked_l2;
++ unsigned int l1i, l2i, port, count;
++ int irq;
++ unsigned int cpu = smp_processor_id();
++ shared_info_t *s = HYPERVISOR_shared_info;
++ vcpu_info_t *vcpu_info = &s->vcpu_info[cpu];
++
++ exit_idle();
++ irq_enter();
++
++ do {
++ /* Avoid a callback storm when we reenable delivery. */
++ vcpu_info->evtchn_upcall_pending = 0;
++
++ /* Nested invocations bail immediately. */
++ if (unlikely(per_cpu(upcall_count, cpu)++))
++ break;
++
++#ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */
++ /* Clear master flag /before/ clearing selector flag. */
++ wmb();
++#endif
++ l1 = xchg(&vcpu_info->evtchn_pending_sel, 0);
++
++ l1i = per_cpu(last_processed_l1i, cpu);
++ l2i = per_cpu(last_processed_l2i, cpu);
++
++ while (l1 != 0) {
++
++ l1i = (l1i + 1) % BITS_PER_LONG;
++ masked_l1 = l1 & ((~0UL) << l1i);
++
++ if (masked_l1 == 0) { /* if we masked out all events, wrap around to the beginning */
++ l1i = BITS_PER_LONG - 1;
++ l2i = BITS_PER_LONG - 1;
++ continue;
++ }
++ l1i = __ffs(masked_l1);
++
++ do {
++ l2 = active_evtchns(cpu, s, l1i);
++
++ l2i = (l2i + 1) % BITS_PER_LONG;
++ masked_l2 = l2 & ((~0UL) << l2i);
++
++ if (masked_l2 == 0) { /* if we masked out all events, move on */
++ l2i = BITS_PER_LONG - 1;
++ break;
++ }
++
++ l2i = __ffs(masked_l2);
++
++ /* process port */
++ port = (l1i * BITS_PER_LONG) + l2i;
++ if ((irq = evtchn_to_irq[port]) != -1)
++ do_IRQ(irq, regs);
++ else
++ evtchn_device_upcall(port);
++
++ /* if this is the final port processed, we'll pick up here+1 next time */
++ per_cpu(last_processed_l1i, cpu) = l1i;
++ per_cpu(last_processed_l2i, cpu) = l2i;
++
++ } while (l2i != BITS_PER_LONG - 1);
++
++ l2 = active_evtchns(cpu, s, l1i);
++ if (l2 == 0) /* we handled all ports, so we can clear the selector bit */
++ l1 &= ~(1UL << l1i);
++
++ }
++
++ /* If there were nested callbacks then we have more to do. */
++ count = per_cpu(upcall_count, cpu);
++ per_cpu(upcall_count, cpu) = 0;
++ } while (unlikely(count != 1));
++
++ irq_exit();
++}
++
++static int find_unbound_irq(void)
++{
++ static int warned;
++ int irq;
++
++ for (irq = DYNIRQ_BASE; irq < (DYNIRQ_BASE + NR_DYNIRQS); irq++)
++ if (irq_bindcount[irq] == 0)
++ return irq;
++
++ if (!warned) {
++ warned = 1;
++ printk(KERN_WARNING "No available IRQ to bind to: "
++ "increase NR_DYNIRQS.\n");
++ }
++
++ return -ENOSPC;
++}
++
++static int bind_caller_port_to_irq(unsigned int caller_port)
++{
++ int irq;
++
++ spin_lock(&irq_mapping_update_lock);
++
++ if ((irq = evtchn_to_irq[caller_port]) == -1) {
++ if ((irq = find_unbound_irq()) < 0)
++ goto out;
++
++ evtchn_to_irq[caller_port] = irq;
++ irq_info[irq] = mk_irq_info(IRQT_CALLER_PORT, 0, caller_port);
++ }
++
++ irq_bindcount[irq]++;
++
++ out:
++ spin_unlock(&irq_mapping_update_lock);
++ return irq;
++}
++
++static int bind_local_port_to_irq(unsigned int local_port)
++{
++ int irq;
++
++ spin_lock(&irq_mapping_update_lock);
++
++ BUG_ON(evtchn_to_irq[local_port] != -1);
++
++ if ((irq = find_unbound_irq()) < 0) {
++ struct evtchn_close close = { .port = local_port };
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close))
++ BUG();
++ goto out;
++ }
++
++ evtchn_to_irq[local_port] = irq;
++ irq_info[irq] = mk_irq_info(IRQT_LOCAL_PORT, 0, local_port);
++ irq_bindcount[irq]++;
++
++ out:
++ spin_unlock(&irq_mapping_update_lock);
++ return irq;
++}
++
++static int bind_listening_port_to_irq(unsigned int remote_domain)
++{
++ struct evtchn_alloc_unbound alloc_unbound;
++ int err;
++
++ alloc_unbound.dom = DOMID_SELF;
++ alloc_unbound.remote_dom = remote_domain;
++
++ err = HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound,
++ &alloc_unbound);
++
++ return err ? : bind_local_port_to_irq(alloc_unbound.port);
++}
++
++static int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,
++ unsigned int remote_port)
++{
++ struct evtchn_bind_interdomain bind_interdomain;
++ int err;
++
++ bind_interdomain.remote_dom = remote_domain;
++ bind_interdomain.remote_port = remote_port;
++
++ err = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain,
++ &bind_interdomain);
++
++ return err ? : bind_local_port_to_irq(bind_interdomain.local_port);
++}
++
++static int bind_virq_to_irq(unsigned int virq, unsigned int cpu)
++{
++ struct evtchn_bind_virq bind_virq;
++ int evtchn, irq;
++
++ spin_lock(&irq_mapping_update_lock);
++
++ if ((irq = per_cpu(virq_to_irq, cpu)[virq]) == -1) {
++ if ((irq = find_unbound_irq()) < 0)
++ goto out;
++
++ bind_virq.virq = virq;
++ bind_virq.vcpu = cpu;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
++ &bind_virq) != 0)
++ BUG();
++ evtchn = bind_virq.port;
++
++ evtchn_to_irq[evtchn] = irq;
++ irq_info[irq] = mk_irq_info(IRQT_VIRQ, virq, evtchn);
++
++ per_cpu(virq_to_irq, cpu)[virq] = irq;
++
++ bind_evtchn_to_cpu(evtchn, cpu);
++ }
++
++ irq_bindcount[irq]++;
++
++ out:
++ spin_unlock(&irq_mapping_update_lock);
++ return irq;
++}
++
++static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
++{
++ struct evtchn_bind_ipi bind_ipi;
++ int evtchn, irq;
++
++ spin_lock(&irq_mapping_update_lock);
++
++ if ((irq = per_cpu(ipi_to_irq, cpu)[ipi]) == -1) {
++ if ((irq = find_unbound_irq()) < 0)
++ goto out;
++
++ bind_ipi.vcpu = cpu;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
++ &bind_ipi) != 0)
++ BUG();
++ evtchn = bind_ipi.port;
++
++ evtchn_to_irq[evtchn] = irq;
++ irq_info[irq] = mk_irq_info(IRQT_IPI, ipi, evtchn);
++
++ per_cpu(ipi_to_irq, cpu)[ipi] = irq;
++
++ bind_evtchn_to_cpu(evtchn, cpu);
++ }
++
++ irq_bindcount[irq]++;
++
++ out:
++ spin_unlock(&irq_mapping_update_lock);
++ return irq;
++}
++
++static void unbind_from_irq(unsigned int irq)
++{
++ struct evtchn_close close;
++ unsigned int cpu;
++ int evtchn = evtchn_from_irq(irq);
++
++ spin_lock(&irq_mapping_update_lock);
++
++ if ((--irq_bindcount[irq] == 0) && VALID_EVTCHN(evtchn)) {
++ close.port = evtchn;
++ if ((type_from_irq(irq) != IRQT_CALLER_PORT) &&
++ HYPERVISOR_event_channel_op(EVTCHNOP_close, &close))
++ BUG();
++
++ switch (type_from_irq(irq)) {
++ case IRQT_VIRQ:
++ per_cpu(virq_to_irq, cpu_from_evtchn(evtchn))
++ [index_from_irq(irq)] = -1;
++ break;
++ case IRQT_IPI:
++ per_cpu(ipi_to_irq, cpu_from_evtchn(evtchn))
++ [index_from_irq(irq)] = -1;
++ break;
++ default:
++ break;
++ }
++
++ /* Closed ports are implicitly re-bound to VCPU0. */
++ bind_evtchn_to_cpu(evtchn, 0);
++
++ evtchn_to_irq[evtchn] = -1;
++ irq_info[irq] = IRQ_UNBOUND;
++
++ /* Zap stats across IRQ changes of use. */
++ for_each_possible_cpu(cpu)
++ kstat_cpu(cpu).irqs[irq] = 0;
++ }
++
++ spin_unlock(&irq_mapping_update_lock);
++}
++
++int bind_caller_port_to_irqhandler(
++ unsigned int caller_port,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id)
++{
++ int irq, retval;
++
++ irq = bind_caller_port_to_irq(caller_port);
++ if (irq < 0)
++ return irq;
++
++ retval = request_irq(irq, handler, irqflags, devname, dev_id);
++ if (retval != 0) {
++ unbind_from_irq(irq);
++ return retval;
++ }
++
++ return irq;
++}
++EXPORT_SYMBOL_GPL(bind_caller_port_to_irqhandler);
++
++int bind_listening_port_to_irqhandler(
++ unsigned int remote_domain,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id)
++{
++ int irq, retval;
++
++ irq = bind_listening_port_to_irq(remote_domain);
++ if (irq < 0)
++ return irq;
++
++ retval = request_irq(irq, handler, irqflags, devname, dev_id);
++ if (retval != 0) {
++ unbind_from_irq(irq);
++ return retval;
++ }
++
++ return irq;
++}
++EXPORT_SYMBOL_GPL(bind_listening_port_to_irqhandler);
++
++int bind_interdomain_evtchn_to_irqhandler(
++ unsigned int remote_domain,
++ unsigned int remote_port,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id)
++{
++ int irq, retval;
++
++ irq = bind_interdomain_evtchn_to_irq(remote_domain, remote_port);
++ if (irq < 0)
++ return irq;
++
++ retval = request_irq(irq, handler, irqflags, devname, dev_id);
++ if (retval != 0) {
++ unbind_from_irq(irq);
++ return retval;
++ }
++
++ return irq;
++}
++EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irqhandler);
++
++int bind_virq_to_irqhandler(
++ unsigned int virq,
++ unsigned int cpu,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id)
++{
++ int irq, retval;
++
++ irq = bind_virq_to_irq(virq, cpu);
++ if (irq < 0)
++ return irq;
++
++ retval = request_irq(irq, handler, irqflags, devname, dev_id);
++ if (retval != 0) {
++ unbind_from_irq(irq);
++ return retval;
++ }
++
++ return irq;
++}
++EXPORT_SYMBOL_GPL(bind_virq_to_irqhandler);
++
++int bind_ipi_to_irqhandler(
++ unsigned int ipi,
++ unsigned int cpu,
++ irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ unsigned long irqflags,
++ const char *devname,
++ void *dev_id)
++{
++ int irq, retval;
++
++ irq = bind_ipi_to_irq(ipi, cpu);
++ if (irq < 0)
++ return irq;
++
++ retval = request_irq(irq, handler, irqflags, devname, dev_id);
++ if (retval != 0) {
++ unbind_from_irq(irq);
++ return retval;
++ }
++
++ return irq;
++}
++EXPORT_SYMBOL_GPL(bind_ipi_to_irqhandler);
++
++void unbind_from_irqhandler(unsigned int irq, void *dev_id)
++{
++ free_irq(irq, dev_id);
++ unbind_from_irq(irq);
++}
++EXPORT_SYMBOL_GPL(unbind_from_irqhandler);
++
++#ifdef CONFIG_SMP
++void rebind_evtchn_to_cpu(int port, unsigned int cpu)
++{
++ struct evtchn_bind_vcpu ebv = { .port = port, .vcpu = cpu };
++ int masked;
++
++ masked = test_and_set_evtchn_mask(port);
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_vcpu, &ebv) == 0)
++ bind_evtchn_to_cpu(port, cpu);
++ if (!masked)
++ unmask_evtchn(port);
++}
++
++static void rebind_irq_to_cpu(unsigned int irq, unsigned int tcpu)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ rebind_evtchn_to_cpu(evtchn, tcpu);
++}
++
++static void set_affinity_irq(unsigned int irq, cpumask_t dest)
++{
++ unsigned tcpu = first_cpu(dest);
++ rebind_irq_to_cpu(irq, tcpu);
++}
++#endif
++
++int resend_irq_on_evtchn(unsigned int irq)
++{
++ int masked, evtchn = evtchn_from_irq(irq);
++ shared_info_t *s = HYPERVISOR_shared_info;
++
++ if (!VALID_EVTCHN(evtchn))
++ return 1;
++
++ masked = test_and_set_evtchn_mask(evtchn);
++ synch_set_bit(evtchn, s->evtchn_pending);
++ if (!masked)
++ unmask_evtchn(evtchn);
++
++ return 1;
++}
++
++/*
++ * Interface to generic handling in irq.c
++ */
++
++static unsigned int startup_dynirq(unsigned int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ unmask_evtchn(evtchn);
++ return 0;
++}
++
++static void shutdown_dynirq(unsigned int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ mask_evtchn(evtchn);
++}
++
++static void enable_dynirq(unsigned int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ unmask_evtchn(evtchn);
++}
++
++static void disable_dynirq(unsigned int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ mask_evtchn(evtchn);
++}
++
++static void ack_dynirq(unsigned int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ move_native_irq(irq);
++
++ if (VALID_EVTCHN(evtchn)) {
++ mask_evtchn(evtchn);
++ clear_evtchn(evtchn);
++ }
++}
++
++static void end_dynirq(unsigned int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn) && !(irq_desc[irq].status & IRQ_DISABLED))
++ unmask_evtchn(evtchn);
++}
++
++static struct hw_interrupt_type dynirq_type = {
++ .typename = "Dynamic-irq",
++ .startup = startup_dynirq,
++ .shutdown = shutdown_dynirq,
++ .enable = enable_dynirq,
++ .disable = disable_dynirq,
++ .ack = ack_dynirq,
++ .end = end_dynirq,
++#ifdef CONFIG_SMP
++ .set_affinity = set_affinity_irq,
++#endif
++ .retrigger = resend_irq_on_evtchn,
++};
++
++static inline void pirq_unmask_notify(int irq)
++{
++ struct physdev_eoi eoi = { .irq = evtchn_get_xen_pirq(irq) };
++ if (unlikely(test_bit(irq - PIRQ_BASE, pirq_needs_eoi)))
++ VOID(HYPERVISOR_physdev_op(PHYSDEVOP_eoi, &eoi));
++}
++
++static inline void pirq_query_unmask(int irq)
++{
++ struct physdev_irq_status_query irq_status;
++ irq_status.irq = evtchn_get_xen_pirq(irq);
++ if (HYPERVISOR_physdev_op(PHYSDEVOP_irq_status_query, &irq_status))
++ irq_status.flags = 0;
++ clear_bit(irq - PIRQ_BASE, pirq_needs_eoi);
++ if (irq_status.flags & XENIRQSTAT_needs_eoi)
++ set_bit(irq - PIRQ_BASE, pirq_needs_eoi);
++}
++
++/*
++ * On startup, if there is no action associated with the IRQ then we are
++ * probing. In this case we should not share with others as it will confuse us.
++ */
++#define probing_irq(_irq) (irq_desc[(_irq)].action == NULL)
++
++static unsigned int startup_pirq(unsigned int irq)
++{
++ struct evtchn_bind_pirq bind_pirq;
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ goto out;
++
++ bind_pirq.pirq = evtchn_get_xen_pirq(irq);
++ /* NB. We are happy to share unless we are probing. */
++ bind_pirq.flags = probing_irq(irq) ? 0 : BIND_PIRQ__WILL_SHARE;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_pirq, &bind_pirq) != 0) {
++ if (!probing_irq(irq))
++ printk(KERN_INFO "Failed to obtain physical IRQ %d\n",
++ irq);
++ return 0;
++ }
++ evtchn = bind_pirq.port;
++
++ pirq_query_unmask(irq);
++
++ evtchn_to_irq[evtchn] = irq;
++ bind_evtchn_to_cpu(evtchn, 0);
++ irq_info[irq] = mk_irq_info(IRQT_PIRQ, bind_pirq.pirq, evtchn);
++
++ out:
++ unmask_evtchn(evtchn);
++ pirq_unmask_notify(irq);
++
++ return 0;
++}
++
++static void shutdown_pirq(unsigned int irq)
++{
++ struct evtchn_close close;
++ int evtchn = evtchn_from_irq(irq);
++
++ if (!VALID_EVTCHN(evtchn))
++ return;
++
++ mask_evtchn(evtchn);
++
++ close.port = evtchn;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0)
++ BUG();
++
++ bind_evtchn_to_cpu(evtchn, 0);
++ evtchn_to_irq[evtchn] = -1;
++ irq_info[irq] = mk_irq_info(IRQT_PIRQ, index_from_irq(irq), 0);
++}
++
++static void enable_pirq(unsigned int irq)
++{
++ startup_pirq(irq);
++}
++
++static void disable_pirq(unsigned int irq)
++{
++}
++
++static void ack_pirq(unsigned int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ move_native_irq(irq);
++
++ if (VALID_EVTCHN(evtchn)) {
++ mask_evtchn(evtchn);
++ clear_evtchn(evtchn);
++ }
++}
++
++static void end_pirq(unsigned int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if ((irq_desc[irq].status & (IRQ_DISABLED|IRQ_PENDING)) ==
++ (IRQ_DISABLED|IRQ_PENDING)) {
++ shutdown_pirq(irq);
++ } else if (VALID_EVTCHN(evtchn)) {
++ unmask_evtchn(evtchn);
++ pirq_unmask_notify(irq);
++ }
++}
++
++static struct hw_interrupt_type pirq_type = {
++ .typename = "Phys-irq",
++ .startup = startup_pirq,
++ .shutdown = shutdown_pirq,
++ .enable = enable_pirq,
++ .disable = disable_pirq,
++ .ack = ack_pirq,
++ .end = end_pirq,
++#ifdef CONFIG_SMP
++ .set_affinity = set_affinity_irq,
++#endif
++ .retrigger = resend_irq_on_evtchn,
++};
++
++int irq_ignore_unhandled(unsigned int irq)
++{
++ struct physdev_irq_status_query irq_status = { .irq = irq };
++
++ if (!is_running_on_xen())
++ return 0;
++
++ if (HYPERVISOR_physdev_op(PHYSDEVOP_irq_status_query, &irq_status))
++ return 0;
++ return !!(irq_status.flags & XENIRQSTAT_shared);
++}
++
++void notify_remote_via_irq(int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ notify_remote_via_evtchn(evtchn);
++}
++EXPORT_SYMBOL_GPL(notify_remote_via_irq);
++
++int irq_to_evtchn_port(int irq)
++{
++ return evtchn_from_irq(irq);
++}
++EXPORT_SYMBOL_GPL(irq_to_evtchn_port);
++
++void mask_evtchn(int port)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++ synch_set_bit(port, s->evtchn_mask);
++}
++EXPORT_SYMBOL_GPL(mask_evtchn);
++
++void unmask_evtchn(int port)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++ unsigned int cpu = smp_processor_id();
++ vcpu_info_t *vcpu_info = &s->vcpu_info[cpu];
++
++ BUG_ON(!irqs_disabled());
++
++ /* Slow path (hypercall) if this is a non-local port. */
++ if (unlikely(cpu != cpu_from_evtchn(port))) {
++ struct evtchn_unmask unmask = { .port = port };
++ VOID(HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &unmask));
++ return;
++ }
++
++ synch_clear_bit(port, s->evtchn_mask);
++
++ /* Did we miss an interrupt 'edge'? Re-fire if so. */
++ if (synch_test_bit(port, s->evtchn_pending) &&
++ !synch_test_and_set_bit(port / BITS_PER_LONG,
++ &vcpu_info->evtchn_pending_sel))
++ vcpu_info->evtchn_upcall_pending = 1;
++}
++EXPORT_SYMBOL_GPL(unmask_evtchn);
++
++void disable_all_local_evtchn(void)
++{
++ unsigned i, cpu = smp_processor_id();
++ shared_info_t *s = HYPERVISOR_shared_info;
++
++ for (i = 0; i < NR_EVENT_CHANNELS; ++i)
++ if (cpu_from_evtchn(i) == cpu)
++ synch_set_bit(i, &s->evtchn_mask[0]);
++}
++
++static void restore_cpu_virqs(unsigned int cpu)
++{
++ struct evtchn_bind_virq bind_virq;
++ int virq, irq, evtchn;
++
++ for (virq = 0; virq < NR_VIRQS; virq++) {
++ if ((irq = per_cpu(virq_to_irq, cpu)[virq]) == -1)
++ continue;
++
++ BUG_ON(irq_info[irq] != mk_irq_info(IRQT_VIRQ, virq, 0));
++
++ /* Get a new binding from Xen. */
++ bind_virq.virq = virq;
++ bind_virq.vcpu = cpu;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
++ &bind_virq) != 0)
++ BUG();
++ evtchn = bind_virq.port;
++
++ /* Record the new mapping. */
++ evtchn_to_irq[evtchn] = irq;
++ irq_info[irq] = mk_irq_info(IRQT_VIRQ, virq, evtchn);
++ bind_evtchn_to_cpu(evtchn, cpu);
++
++ /* Ready for use. */
++ unmask_evtchn(evtchn);
++ }
++}
++
++static void restore_cpu_ipis(unsigned int cpu)
++{
++ struct evtchn_bind_ipi bind_ipi;
++ int ipi, irq, evtchn;
++
++ for (ipi = 0; ipi < NR_IPIS; ipi++) {
++ if ((irq = per_cpu(ipi_to_irq, cpu)[ipi]) == -1)
++ continue;
++
++ BUG_ON(irq_info[irq] != mk_irq_info(IRQT_IPI, ipi, 0));
++
++ /* Get a new binding from Xen. */
++ bind_ipi.vcpu = cpu;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
++ &bind_ipi) != 0)
++ BUG();
++ evtchn = bind_ipi.port;
++
++ /* Record the new mapping. */
++ evtchn_to_irq[evtchn] = irq;
++ irq_info[irq] = mk_irq_info(IRQT_IPI, ipi, evtchn);
++ bind_evtchn_to_cpu(evtchn, cpu);
++
++ /* Ready for use. */
++ unmask_evtchn(evtchn);
++
++ }
++}
++
++void irq_resume(void)
++{
++ unsigned int cpu, irq, evtchn;
++
++ init_evtchn_cpu_bindings();
++
++ /* New event-channel space is not 'live' yet. */
++ for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++)
++ mask_evtchn(evtchn);
++
++ /* Check that no PIRQs are still bound. */
++ for (irq = PIRQ_BASE; irq < (PIRQ_BASE + NR_PIRQS); irq++)
++ BUG_ON(irq_info[irq] != IRQ_UNBOUND);
++
++ /* No IRQ <-> event-channel mappings. */
++ for (irq = 0; irq < NR_IRQS; irq++)
++ irq_info[irq] &= ~((1U << _EVTCHN_BITS) - 1);
++ for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++)
++ evtchn_to_irq[evtchn] = -1;
++
++ for_each_possible_cpu(cpu) {
++ restore_cpu_virqs(cpu);
++ restore_cpu_ipis(cpu);
++ }
++
++}
++
++#if defined(CONFIG_X86_IO_APIC)
++#define identity_mapped_irq(irq) (!IO_APIC_IRQ((irq) - PIRQ_BASE))
++#elif defined(CONFIG_X86)
++#define identity_mapped_irq(irq) (((irq) - PIRQ_BASE) < 16)
++#else
++#define identity_mapped_irq(irq) (1)
++#endif
++
++void evtchn_register_pirq(int irq)
++{
++ BUG_ON(irq < PIRQ_BASE || irq - PIRQ_BASE > NR_PIRQS);
++ if (identity_mapped_irq(irq))
++ return;
++ irq_info[irq] = mk_irq_info(IRQT_PIRQ, irq, 0);
++ irq_desc[irq].chip = &pirq_type;
++}
++
++int evtchn_map_pirq(int irq, int xen_pirq)
++{
++ if (irq < 0) {
++ static DEFINE_SPINLOCK(irq_alloc_lock);
++
++ irq = PIRQ_BASE + NR_PIRQS - 1;
++ spin_lock(&irq_alloc_lock);
++ do {
++ if (identity_mapped_irq(irq))
++ continue;
++ if (!index_from_irq(irq)) {
++ BUG_ON(type_from_irq(irq) != IRQT_UNBOUND);
++ irq_info[irq] = mk_irq_info(IRQT_PIRQ,
++ xen_pirq, 0);
++ break;
++ }
++ } while (--irq >= PIRQ_BASE);
++ spin_unlock(&irq_alloc_lock);
++ if (irq < PIRQ_BASE)
++ return -ENOSPC;
++ irq_desc[irq].chip = &pirq_type;
++ } else if (!xen_pirq) {
++ if (unlikely(type_from_irq(irq) != IRQT_PIRQ))
++ return -EINVAL;
++ irq_desc[irq].chip = &no_irq_type;
++ irq_info[irq] = IRQ_UNBOUND;
++ return 0;
++ } else if (type_from_irq(irq) != IRQT_PIRQ
++ || index_from_irq(irq) != xen_pirq) {
++ printk(KERN_ERR "IRQ#%d is already mapped to %d:%u - "
++ "cannot map to PIRQ#%u\n",
++ irq, type_from_irq(irq), index_from_irq(irq), xen_pirq);
++ return -EINVAL;
++ }
++ return index_from_irq(irq) ? irq : -EINVAL;
++}
++
++int evtchn_get_xen_pirq(int irq)
++{
++ if (identity_mapped_irq(irq))
++ return irq;
++ BUG_ON(type_from_irq(irq) != IRQT_PIRQ);
++ return index_from_irq(irq);
++}
++
++void __init xen_init_IRQ(void)
++{
++ unsigned int i;
++
++ init_evtchn_cpu_bindings();
++
++ /* No event channels are 'live' right now. */
++ for (i = 0; i < NR_EVENT_CHANNELS; i++)
++ mask_evtchn(i);
++
++ /* No IRQ -> event-channel mappings. */
++ for (i = 0; i < NR_IRQS; i++)
++ irq_info[i] = IRQ_UNBOUND;
++
++ /* Dynamic IRQ space is currently unbound. Zero the refcnts. */
++ for (i = DYNIRQ_BASE; i < (DYNIRQ_BASE + NR_DYNIRQS); i++) {
++ irq_bindcount[i] = 0;
++
++ irq_desc[i].status = IRQ_DISABLED|IRQ_NOPROBE;
++ irq_desc[i].action = NULL;
++ irq_desc[i].depth = 1;
++ irq_desc[i].chip = &dynirq_type;
++ }
++
++ /* Phys IRQ space is statically bound (1:1 mapping). Nail refcnts. */
++ for (i = PIRQ_BASE; i < (PIRQ_BASE + NR_PIRQS); i++) {
++ irq_bindcount[i] = 1;
++
++ if (!identity_mapped_irq(i))
++ continue;
++
++#ifdef RTC_IRQ
++ /* If not domain 0, force our RTC driver to fail its probe. */
++ if (i - PIRQ_BASE == RTC_IRQ && !is_initial_xendomain())
++ continue;
++#endif
++
++ irq_desc[i].status = IRQ_DISABLED;
++ irq_desc[i].action = NULL;
++ irq_desc[i].depth = 1;
++ irq_desc[i].chip = &pirq_type;
++ }
++}
+Index: head-2008-11-25/drivers/xen/core/features.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/features.c 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,34 @@
++/******************************************************************************
++ * features.c
++ *
++ * Xen feature flags.
++ *
++ * Copyright (c) 2006, Ian Campbell, XenSource Inc.
++ */
++#include <linux/types.h>
++#include <linux/cache.h>
++#include <linux/module.h>
++#include <asm/hypervisor.h>
++#include <xen/features.h>
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly;
++/* Not a GPL symbol: used in ubiquitous macros, so too restrictive. */
++EXPORT_SYMBOL(xen_features);
++
++void setup_xen_features(void)
++{
++ xen_feature_info_t fi;
++ int i, j;
++
++ for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) {
++ fi.submap_idx = i;
++ if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
++ break;
++ for (j=0; j<32; j++)
++ xen_features[i*32+j] = !!(fi.submap & 1<<j);
++ }
++}
+Index: head-2008-11-25/drivers/xen/core/firmware.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/firmware.c 2007-06-22 09:08:06.000000000 +0200
+@@ -0,0 +1,74 @@
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/init.h>
++#include <linux/edd.h>
++#include <video/edid.h>
++#include <xen/interface/platform.h>
++#include <asm/hypervisor.h>
++
++#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
++void __init copy_edd(void)
++{
++ int ret;
++ struct xen_platform_op op;
++
++ if (!is_initial_xendomain())
++ return;
++
++ op.cmd = XENPF_firmware_info;
++
++ op.u.firmware_info.type = XEN_FW_DISK_INFO;
++ for (op.u.firmware_info.index = 0;
++ edd.edd_info_nr < EDDMAXNR;
++ op.u.firmware_info.index++) {
++ struct edd_info *info = edd.edd_info + edd.edd_info_nr;
++
++ info->params.length = sizeof(info->params);
++ set_xen_guest_handle(op.u.firmware_info.u.disk_info.edd_params,
++ &info->params);
++ ret = HYPERVISOR_platform_op(&op);
++ if (ret)
++ break;
++
++#define C(x) info->x = op.u.firmware_info.u.disk_info.x
++ C(device);
++ C(version);
++ C(interface_support);
++ C(legacy_max_cylinder);
++ C(legacy_max_head);
++ C(legacy_sectors_per_track);
++#undef C
++
++ edd.edd_info_nr++;
++ }
++
++ op.u.firmware_info.type = XEN_FW_DISK_MBR_SIGNATURE;
++ for (op.u.firmware_info.index = 0;
++ edd.mbr_signature_nr < EDD_MBR_SIG_MAX;
++ op.u.firmware_info.index++) {
++ ret = HYPERVISOR_platform_op(&op);
++ if (ret)
++ break;
++ edd.mbr_signature[edd.mbr_signature_nr++] =
++ op.u.firmware_info.u.disk_mbr_signature.mbr_signature;
++ }
++}
++#endif
++
++void __init copy_edid(void)
++{
++#if defined(CONFIG_FIRMWARE_EDID) && defined(CONFIG_X86)
++ struct xen_platform_op op;
++
++ if (!is_initial_xendomain())
++ return;
++
++ op.cmd = XENPF_firmware_info;
++ op.u.firmware_info.index = 0;
++ op.u.firmware_info.type = XEN_FW_VBEDDC_INFO;
++ set_xen_guest_handle(op.u.firmware_info.u.vbeddc_info.edid,
++ edid_info.dummy);
++ if (HYPERVISOR_platform_op(&op) != 0)
++ memset(edid_info.dummy, 0x13, sizeof(edid_info.dummy));
++#endif
++}
+Index: head-2008-11-25/drivers/xen/core/gnttab.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/gnttab.c 2008-11-04 11:13:10.000000000 +0100
+@@ -0,0 +1,772 @@
++/******************************************************************************
++ * gnttab.c
++ *
++ * Granting foreign access to our memory reservation.
++ *
++ * Copyright (c) 2005-2006, Christopher Clark
++ * Copyright (c) 2004-2005, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/module.h>
++#include <linux/sched.h>
++#include <linux/mm.h>
++#include <linux/seqlock.h>
++#include <xen/interface/xen.h>
++#include <xen/gnttab.h>
++#include <asm/pgtable.h>
++#include <asm/uaccess.h>
++#include <asm/synch_bitops.h>
++#include <asm/io.h>
++#include <xen/interface/memory.h>
++#include <xen/driver_util.h>
++#include <asm/gnttab_dma.h>
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++/* External tools reserve first few grant table entries. */
++#define NR_RESERVED_ENTRIES 8
++#define GNTTAB_LIST_END 0xffffffff
++#define ENTRIES_PER_GRANT_FRAME (PAGE_SIZE / sizeof(grant_entry_t))
++
++static grant_ref_t **gnttab_list;
++static unsigned int nr_grant_frames;
++static unsigned int boot_max_nr_grant_frames;
++static int gnttab_free_count;
++static grant_ref_t gnttab_free_head;
++static DEFINE_SPINLOCK(gnttab_list_lock);
++
++static struct grant_entry *shared;
++
++static struct gnttab_free_callback *gnttab_free_callback_list;
++
++static int gnttab_expand(unsigned int req_entries);
++
++#define RPP (PAGE_SIZE / sizeof(grant_ref_t))
++#define gnttab_entry(entry) (gnttab_list[(entry) / RPP][(entry) % RPP])
++
++#define nr_freelist_frames(grant_frames) \
++ (((grant_frames) * ENTRIES_PER_GRANT_FRAME + RPP - 1) / RPP)
++
++static int get_free_entries(int count)
++{
++ unsigned long flags;
++ int ref, rc;
++ grant_ref_t head;
++
++ spin_lock_irqsave(&gnttab_list_lock, flags);
++
++ if ((gnttab_free_count < count) &&
++ ((rc = gnttab_expand(count - gnttab_free_count)) < 0)) {
++ spin_unlock_irqrestore(&gnttab_list_lock, flags);
++ return rc;
++ }
++
++ ref = head = gnttab_free_head;
++ gnttab_free_count -= count;
++ while (count-- > 1)
++ head = gnttab_entry(head);
++ gnttab_free_head = gnttab_entry(head);
++ gnttab_entry(head) = GNTTAB_LIST_END;
++
++ spin_unlock_irqrestore(&gnttab_list_lock, flags);
++
++ return ref;
++}
++
++#define get_free_entry() get_free_entries(1)
++
++static void do_free_callbacks(void)
++{
++ struct gnttab_free_callback *callback, *next;
++
++ callback = gnttab_free_callback_list;
++ gnttab_free_callback_list = NULL;
++
++ while (callback != NULL) {
++ next = callback->next;
++ if (gnttab_free_count >= callback->count) {
++ callback->next = NULL;
++ callback->queued = 0;
++ callback->fn(callback->arg);
++ } else {
++ callback->next = gnttab_free_callback_list;
++ gnttab_free_callback_list = callback;
++ }
++ callback = next;
++ }
++}
++
++static inline void check_free_callbacks(void)
++{
++ if (unlikely(gnttab_free_callback_list))
++ do_free_callbacks();
++}
++
++static void put_free_entry(grant_ref_t ref)
++{
++ unsigned long flags;
++ spin_lock_irqsave(&gnttab_list_lock, flags);
++ gnttab_entry(ref) = gnttab_free_head;
++ gnttab_free_head = ref;
++ gnttab_free_count++;
++ check_free_callbacks();
++ spin_unlock_irqrestore(&gnttab_list_lock, flags);
++}
++
++/*
++ * Public grant-issuing interface functions
++ */
++
++int gnttab_grant_foreign_access(domid_t domid, unsigned long frame,
++ int flags)
++{
++ int ref;
++
++ if (unlikely((ref = get_free_entry()) < 0))
++ return -ENOSPC;
++
++ shared[ref].frame = frame;
++ shared[ref].domid = domid;
++ wmb();
++ BUG_ON(flags & (GTF_accept_transfer | GTF_reading | GTF_writing));
++ shared[ref].flags = GTF_permit_access | flags;
++
++ return ref;
++}
++EXPORT_SYMBOL_GPL(gnttab_grant_foreign_access);
++
++void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid,
++ unsigned long frame, int flags)
++{
++ shared[ref].frame = frame;
++ shared[ref].domid = domid;
++ wmb();
++ BUG_ON(flags & (GTF_accept_transfer | GTF_reading | GTF_writing));
++ shared[ref].flags = GTF_permit_access | flags;
++}
++EXPORT_SYMBOL_GPL(gnttab_grant_foreign_access_ref);
++
++
++int gnttab_query_foreign_access(grant_ref_t ref)
++{
++ u16 nflags;
++
++ nflags = shared[ref].flags;
++
++ return (nflags & (GTF_reading|GTF_writing));
++}
++EXPORT_SYMBOL_GPL(gnttab_query_foreign_access);
++
++int gnttab_end_foreign_access_ref(grant_ref_t ref)
++{
++ u16 flags, nflags;
++
++ nflags = shared[ref].flags;
++ do {
++ if ((flags = nflags) & (GTF_reading|GTF_writing)) {
++ printk(KERN_DEBUG "WARNING: g.e. still in use!\n");
++ return 0;
++ }
++ } while ((nflags = synch_cmpxchg_subword(&shared[ref].flags, flags, 0)) !=
++ flags);
++
++ return 1;
++}
++EXPORT_SYMBOL_GPL(gnttab_end_foreign_access_ref);
++
++void gnttab_end_foreign_access(grant_ref_t ref, unsigned long page)
++{
++ if (gnttab_end_foreign_access_ref(ref)) {
++ put_free_entry(ref);
++ if (page != 0)
++ free_page(page);
++ } else {
++ /* XXX This needs to be fixed so that the ref and page are
++ placed on a list to be freed up later. */
++ printk(KERN_DEBUG
++ "WARNING: leaking g.e. and page still in use!\n");
++ }
++}
++EXPORT_SYMBOL_GPL(gnttab_end_foreign_access);
++
++int gnttab_grant_foreign_transfer(domid_t domid, unsigned long pfn)
++{
++ int ref;
++
++ if (unlikely((ref = get_free_entry()) < 0))
++ return -ENOSPC;
++ gnttab_grant_foreign_transfer_ref(ref, domid, pfn);
++
++ return ref;
++}
++EXPORT_SYMBOL_GPL(gnttab_grant_foreign_transfer);
++
++void gnttab_grant_foreign_transfer_ref(grant_ref_t ref, domid_t domid,
++ unsigned long pfn)
++{
++ shared[ref].frame = pfn;
++ shared[ref].domid = domid;
++ wmb();
++ shared[ref].flags = GTF_accept_transfer;
++}
++EXPORT_SYMBOL_GPL(gnttab_grant_foreign_transfer_ref);
++
++unsigned long gnttab_end_foreign_transfer_ref(grant_ref_t ref)
++{
++ unsigned long frame;
++ u16 flags;
++
++ /*
++ * If a transfer is not even yet started, try to reclaim the grant
++ * reference and return failure (== 0).
++ */
++ while (!((flags = shared[ref].flags) & GTF_transfer_committed)) {
++ if (synch_cmpxchg_subword(&shared[ref].flags, flags, 0) == flags)
++ return 0;
++ cpu_relax();
++ }
++
++ /* If a transfer is in progress then wait until it is completed. */
++ while (!(flags & GTF_transfer_completed)) {
++ flags = shared[ref].flags;
++ cpu_relax();
++ }
++
++ /* Read the frame number /after/ reading completion status. */
++ rmb();
++ frame = shared[ref].frame;
++ BUG_ON(frame == 0);
++
++ return frame;
++}
++EXPORT_SYMBOL_GPL(gnttab_end_foreign_transfer_ref);
++
++unsigned long gnttab_end_foreign_transfer(grant_ref_t ref)
++{
++ unsigned long frame = gnttab_end_foreign_transfer_ref(ref);
++ put_free_entry(ref);
++ return frame;
++}
++EXPORT_SYMBOL_GPL(gnttab_end_foreign_transfer);
++
++void gnttab_free_grant_reference(grant_ref_t ref)
++{
++ put_free_entry(ref);
++}
++EXPORT_SYMBOL_GPL(gnttab_free_grant_reference);
++
++void gnttab_free_grant_references(grant_ref_t head)
++{
++ grant_ref_t ref;
++ unsigned long flags;
++ int count = 1;
++ if (head == GNTTAB_LIST_END)
++ return;
++ spin_lock_irqsave(&gnttab_list_lock, flags);
++ ref = head;
++ while (gnttab_entry(ref) != GNTTAB_LIST_END) {
++ ref = gnttab_entry(ref);
++ count++;
++ }
++ gnttab_entry(ref) = gnttab_free_head;
++ gnttab_free_head = head;
++ gnttab_free_count += count;
++ check_free_callbacks();
++ spin_unlock_irqrestore(&gnttab_list_lock, flags);
++}
++EXPORT_SYMBOL_GPL(gnttab_free_grant_references);
++
++int gnttab_alloc_grant_references(u16 count, grant_ref_t *head)
++{
++ int h = get_free_entries(count);
++
++ if (h < 0)
++ return -ENOSPC;
++
++ *head = h;
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(gnttab_alloc_grant_references);
++
++int gnttab_empty_grant_references(const grant_ref_t *private_head)
++{
++ return (*private_head == GNTTAB_LIST_END);
++}
++EXPORT_SYMBOL_GPL(gnttab_empty_grant_references);
++
++int gnttab_claim_grant_reference(grant_ref_t *private_head)
++{
++ grant_ref_t g = *private_head;
++ if (unlikely(g == GNTTAB_LIST_END))
++ return -ENOSPC;
++ *private_head = gnttab_entry(g);
++ return g;
++}
++EXPORT_SYMBOL_GPL(gnttab_claim_grant_reference);
++
++void gnttab_release_grant_reference(grant_ref_t *private_head,
++ grant_ref_t release)
++{
++ gnttab_entry(release) = *private_head;
++ *private_head = release;
++}
++EXPORT_SYMBOL_GPL(gnttab_release_grant_reference);
++
++void gnttab_request_free_callback(struct gnttab_free_callback *callback,
++ void (*fn)(void *), void *arg, u16 count)
++{
++ unsigned long flags;
++ spin_lock_irqsave(&gnttab_list_lock, flags);
++ if (callback->queued)
++ goto out;
++ callback->fn = fn;
++ callback->arg = arg;
++ callback->count = count;
++ callback->queued = 1;
++ callback->next = gnttab_free_callback_list;
++ gnttab_free_callback_list = callback;
++ check_free_callbacks();
++out:
++ spin_unlock_irqrestore(&gnttab_list_lock, flags);
++}
++EXPORT_SYMBOL_GPL(gnttab_request_free_callback);
++
++void gnttab_cancel_free_callback(struct gnttab_free_callback *callback)
++{
++ struct gnttab_free_callback **pcb;
++ unsigned long flags;
++
++ spin_lock_irqsave(&gnttab_list_lock, flags);
++ for (pcb = &gnttab_free_callback_list; *pcb; pcb = &(*pcb)->next) {
++ if (*pcb == callback) {
++ *pcb = callback->next;
++ callback->queued = 0;
++ break;
++ }
++ }
++ spin_unlock_irqrestore(&gnttab_list_lock, flags);
++}
++EXPORT_SYMBOL_GPL(gnttab_cancel_free_callback);
++
++static int grow_gnttab_list(unsigned int more_frames)
++{
++ unsigned int new_nr_grant_frames, extra_entries, i;
++ unsigned int nr_glist_frames, new_nr_glist_frames;
++
++ new_nr_grant_frames = nr_grant_frames + more_frames;
++ extra_entries = more_frames * ENTRIES_PER_GRANT_FRAME;
++
++ nr_glist_frames = nr_freelist_frames(nr_grant_frames);
++ new_nr_glist_frames = nr_freelist_frames(new_nr_grant_frames);
++ for (i = nr_glist_frames; i < new_nr_glist_frames; i++) {
++ gnttab_list[i] = (grant_ref_t *)__get_free_page(GFP_ATOMIC);
++ if (!gnttab_list[i])
++ goto grow_nomem;
++ }
++
++ for (i = ENTRIES_PER_GRANT_FRAME * nr_grant_frames;
++ i < ENTRIES_PER_GRANT_FRAME * new_nr_grant_frames - 1; i++)
++ gnttab_entry(i) = i + 1;
++
++ gnttab_entry(i) = gnttab_free_head;
++ gnttab_free_head = ENTRIES_PER_GRANT_FRAME * nr_grant_frames;
++ gnttab_free_count += extra_entries;
++
++ nr_grant_frames = new_nr_grant_frames;
++
++ check_free_callbacks();
++
++ return 0;
++
++grow_nomem:
++ for ( ; i >= nr_glist_frames; i--)
++ free_page((unsigned long) gnttab_list[i]);
++ return -ENOMEM;
++}
++
++static unsigned int __max_nr_grant_frames(void)
++{
++ struct gnttab_query_size query;
++ int rc;
++
++ query.dom = DOMID_SELF;
++
++ rc = HYPERVISOR_grant_table_op(GNTTABOP_query_size, &query, 1);
++ if ((rc < 0) || (query.status != GNTST_okay))
++ return 4; /* Legacy max supported number of frames */
++
++ return query.max_nr_frames;
++}
++
++static inline unsigned int max_nr_grant_frames(void)
++{
++ unsigned int xen_max = __max_nr_grant_frames();
++
++ if (xen_max > boot_max_nr_grant_frames)
++ return boot_max_nr_grant_frames;
++ return xen_max;
++}
++
++#ifdef CONFIG_XEN
++
++static DEFINE_SEQLOCK(gnttab_dma_lock);
++
++#ifdef CONFIG_X86
++static int map_pte_fn(pte_t *pte, struct page *pmd_page,
++ unsigned long addr, void *data)
++{
++ unsigned long **frames = (unsigned long **)data;
++
++ set_pte_at(&init_mm, addr, pte, pfn_pte_ma((*frames)[0], PAGE_KERNEL));
++ (*frames)++;
++ return 0;
++}
++
++static int unmap_pte_fn(pte_t *pte, struct page *pmd_page,
++ unsigned long addr, void *data)
++{
++
++ set_pte_at(&init_mm, addr, pte, __pte(0));
++ return 0;
++}
++
++void *arch_gnttab_alloc_shared(unsigned long *frames)
++{
++ struct vm_struct *area;
++ area = alloc_vm_area(PAGE_SIZE * max_nr_grant_frames());
++ BUG_ON(area == NULL);
++ return area->addr;
++}
++#endif /* CONFIG_X86 */
++
++static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
++{
++ struct gnttab_setup_table setup;
++ unsigned long *frames;
++ unsigned int nr_gframes = end_idx + 1;
++ int rc;
++
++ frames = kmalloc(nr_gframes * sizeof(unsigned long), GFP_ATOMIC);
++ if (!frames)
++ return -ENOMEM;
++
++ setup.dom = DOMID_SELF;
++ setup.nr_frames = nr_gframes;
++ set_xen_guest_handle(setup.frame_list, frames);
++
++ rc = HYPERVISOR_grant_table_op(GNTTABOP_setup_table, &setup, 1);
++ if (rc == -ENOSYS) {
++ kfree(frames);
++ return -ENOSYS;
++ }
++
++ BUG_ON(rc || setup.status);
++
++ if (shared == NULL)
++ shared = arch_gnttab_alloc_shared(frames);
++
++#ifdef CONFIG_X86
++ rc = apply_to_page_range(&init_mm, (unsigned long)shared,
++ PAGE_SIZE * nr_gframes,
++ map_pte_fn, &frames);
++ BUG_ON(rc);
++ frames -= nr_gframes; /* adjust after map_pte_fn() */
++#endif /* CONFIG_X86 */
++
++ kfree(frames);
++
++ return 0;
++}
++
++static void gnttab_page_free(struct page *page)
++{
++ ClearPageForeign(page);
++ gnttab_reset_grant_page(page);
++ put_page(page);
++}
++
++/*
++ * Must not be called with IRQs off. This should only be used on the
++ * slow path.
++ *
++ * Copy a foreign granted page to local memory.
++ */
++int gnttab_copy_grant_page(grant_ref_t ref, struct page **pagep)
++{
++ struct gnttab_unmap_and_replace unmap;
++ mmu_update_t mmu;
++ struct page *page;
++ struct page *new_page;
++ void *new_addr;
++ void *addr;
++ paddr_t pfn;
++ maddr_t mfn;
++ maddr_t new_mfn;
++ int err;
++
++ page = *pagep;
++ if (!get_page_unless_zero(page))
++ return -ENOENT;
++
++ err = -ENOMEM;
++ new_page = alloc_page(GFP_ATOMIC | __GFP_NOWARN);
++ if (!new_page)
++ goto out;
++
++ new_addr = page_address(new_page);
++ addr = page_address(page);
++ memcpy(new_addr, addr, PAGE_SIZE);
++
++ pfn = page_to_pfn(page);
++ mfn = pfn_to_mfn(pfn);
++ new_mfn = virt_to_mfn(new_addr);
++
++ write_seqlock(&gnttab_dma_lock);
++
++ /* Make seq visible before checking page_mapped. */
++ smp_mb();
++
++ /* Has the page been DMA-mapped? */
++ if (unlikely(page_mapped(page))) {
++ write_sequnlock(&gnttab_dma_lock);
++ put_page(new_page);
++ err = -EBUSY;
++ goto out;
++ }
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap))
++ set_phys_to_machine(pfn, new_mfn);
++
++ gnttab_set_replace_op(&unmap, (unsigned long)addr,
++ (unsigned long)new_addr, ref);
++
++ err = HYPERVISOR_grant_table_op(GNTTABOP_unmap_and_replace,
++ &unmap, 1);
++ BUG_ON(err);
++ BUG_ON(unmap.status);
++
++ write_sequnlock(&gnttab_dma_lock);
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ set_phys_to_machine(page_to_pfn(new_page), INVALID_P2M_ENTRY);
++
++ mmu.ptr = (new_mfn << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE;
++ mmu.val = pfn;
++ err = HYPERVISOR_mmu_update(&mmu, 1, NULL, DOMID_SELF);
++ BUG_ON(err);
++ }
++
++ new_page->mapping = page->mapping;
++ new_page->index = page->index;
++ set_bit(PG_foreign, &new_page->flags);
++ *pagep = new_page;
++
++ SetPageForeign(page, gnttab_page_free);
++ page->mapping = NULL;
++
++out:
++ put_page(page);
++ return err;
++}
++EXPORT_SYMBOL_GPL(gnttab_copy_grant_page);
++
++void gnttab_reset_grant_page(struct page *page)
++{
++ init_page_count(page);
++ reset_page_mapcount(page);
++}
++EXPORT_SYMBOL_GPL(gnttab_reset_grant_page);
++
++/*
++ * Keep track of foreign pages marked as PageForeign so that we don't
++ * return them to the remote domain prematurely.
++ *
++ * PageForeign pages are pinned down by increasing their mapcount.
++ *
++ * All other pages are simply returned as is.
++ */
++void __gnttab_dma_map_page(struct page *page)
++{
++ unsigned int seq;
++
++ if (!is_running_on_xen() || !PageForeign(page))
++ return;
++
++ do {
++ seq = read_seqbegin(&gnttab_dma_lock);
++
++ if (gnttab_dma_local_pfn(page))
++ break;
++
++ atomic_set(&page->_mapcount, 0);
++
++ /* Make _mapcount visible before read_seqretry. */
++ smp_mb();
++ } while (unlikely(read_seqretry(&gnttab_dma_lock, seq)));
++}
++
++int gnttab_resume(void)
++{
++ if (max_nr_grant_frames() < nr_grant_frames)
++ return -ENOSYS;
++ return gnttab_map(0, nr_grant_frames - 1);
++}
++
++int gnttab_suspend(void)
++{
++#ifdef CONFIG_X86
++ apply_to_page_range(&init_mm, (unsigned long)shared,
++ PAGE_SIZE * nr_grant_frames,
++ unmap_pte_fn, NULL);
++#endif
++ return 0;
++}
++
++#else /* !CONFIG_XEN */
++
++#include <platform-pci.h>
++
++static unsigned long resume_frames;
++
++static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
++{
++ struct xen_add_to_physmap xatp;
++ unsigned int i = end_idx;
++
++ /* Loop backwards, so that the first hypercall has the largest index,
++ * ensuring that the table will grow only once.
++ */
++ do {
++ xatp.domid = DOMID_SELF;
++ xatp.idx = i;
++ xatp.space = XENMAPSPACE_grant_table;
++ xatp.gpfn = (resume_frames >> PAGE_SHIFT) + i;
++ if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp))
++ BUG();
++ } while (i-- > start_idx);
++
++ return 0;
++}
++
++int gnttab_resume(void)
++{
++ unsigned int max_nr_gframes, nr_gframes;
++
++ nr_gframes = nr_grant_frames;
++ max_nr_gframes = max_nr_grant_frames();
++ if (max_nr_gframes < nr_gframes)
++ return -ENOSYS;
++
++ if (!resume_frames) {
++ resume_frames = alloc_xen_mmio(PAGE_SIZE * max_nr_gframes);
++ shared = ioremap(resume_frames, PAGE_SIZE * max_nr_gframes);
++ if (shared == NULL) {
++ printk("error to ioremap gnttab share frames\n");
++ return -1;
++ }
++ }
++
++ gnttab_map(0, nr_gframes - 1);
++
++ return 0;
++}
++
++#endif /* !CONFIG_XEN */
++
++static int gnttab_expand(unsigned int req_entries)
++{
++ int rc;
++ unsigned int cur, extra;
++
++ cur = nr_grant_frames;
++ extra = ((req_entries + (ENTRIES_PER_GRANT_FRAME-1)) /
++ ENTRIES_PER_GRANT_FRAME);
++ if (cur + extra > max_nr_grant_frames())
++ return -ENOSPC;
++
++ if ((rc = gnttab_map(cur, cur + extra - 1)) == 0)
++ rc = grow_gnttab_list(extra);
++
++ return rc;
++}
++
++int __devinit gnttab_init(void)
++{
++ int i;
++ unsigned int max_nr_glist_frames, nr_glist_frames;
++ unsigned int nr_init_grefs;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ nr_grant_frames = 1;
++ boot_max_nr_grant_frames = __max_nr_grant_frames();
++
++ /* Determine the maximum number of frames required for the
++ * grant reference free list on the current hypervisor.
++ */
++ max_nr_glist_frames = nr_freelist_frames(boot_max_nr_grant_frames);
++
++ gnttab_list = kmalloc(max_nr_glist_frames * sizeof(grant_ref_t *),
++ GFP_KERNEL);
++ if (gnttab_list == NULL)
++ return -ENOMEM;
++
++ nr_glist_frames = nr_freelist_frames(nr_grant_frames);
++ for (i = 0; i < nr_glist_frames; i++) {
++ gnttab_list[i] = (grant_ref_t *)__get_free_page(GFP_KERNEL);
++ if (gnttab_list[i] == NULL)
++ goto ini_nomem;
++ }
++
++ if (gnttab_resume() < 0)
++ return -ENODEV;
++
++ nr_init_grefs = nr_grant_frames * ENTRIES_PER_GRANT_FRAME;
++
++ for (i = NR_RESERVED_ENTRIES; i < nr_init_grefs - 1; i++)
++ gnttab_entry(i) = i + 1;
++
++ gnttab_entry(nr_init_grefs - 1) = GNTTAB_LIST_END;
++ gnttab_free_count = nr_init_grefs - NR_RESERVED_ENTRIES;
++ gnttab_free_head = NR_RESERVED_ENTRIES;
++
++ return 0;
++
++ ini_nomem:
++ for (i--; i >= 0; i--)
++ free_page((unsigned long)gnttab_list[i]);
++ kfree(gnttab_list);
++ return -ENOMEM;
++}
++
++#ifdef CONFIG_XEN
++core_initcall(gnttab_init);
++#endif
+Index: head-2008-11-25/drivers/xen/core/hypervisor_sysfs.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/hypervisor_sysfs.c 2007-07-10 09:42:30.000000000 +0200
+@@ -0,0 +1,57 @@
++/*
++ * copyright (c) 2006 IBM Corporation
++ * Authored by: Mike D. Day <ncmike@us.ibm.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/kobject.h>
++#include <xen/hypervisor_sysfs.h>
++#include <asm/hypervisor.h>
++
++static ssize_t hyp_sysfs_show(struct kobject *kobj,
++ struct attribute *attr,
++ char *buffer)
++{
++ struct hyp_sysfs_attr *hyp_attr;
++ hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
++ if (hyp_attr->show)
++ return hyp_attr->show(hyp_attr, buffer);
++ return 0;
++}
++
++static ssize_t hyp_sysfs_store(struct kobject *kobj,
++ struct attribute *attr,
++ const char *buffer,
++ size_t len)
++{
++ struct hyp_sysfs_attr *hyp_attr;
++ hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
++ if (hyp_attr->store)
++ return hyp_attr->store(hyp_attr, buffer, len);
++ return 0;
++}
++
++static struct sysfs_ops hyp_sysfs_ops = {
++ .show = hyp_sysfs_show,
++ .store = hyp_sysfs_store,
++};
++
++static struct kobj_type hyp_sysfs_kobj_type = {
++ .sysfs_ops = &hyp_sysfs_ops,
++};
++
++static int __init hypervisor_subsys_init(void)
++{
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ hypervisor_subsys.kset.kobj.ktype = &hyp_sysfs_kobj_type;
++ return 0;
++}
++
++device_initcall(hypervisor_subsys_init);
+Index: head-2008-11-25/drivers/xen/core/machine_kexec.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/machine_kexec.c 2008-10-13 13:43:45.000000000 +0200
+@@ -0,0 +1,222 @@
++/*
++ * drivers/xen/core/machine_kexec.c
++ * handle transition of Linux booting another kernel
++ */
++
++#include <linux/kexec.h>
++#include <xen/interface/kexec.h>
++#include <linux/mm.h>
++#include <linux/bootmem.h>
++
++extern void machine_kexec_setup_load_arg(xen_kexec_image_t *xki,
++ struct kimage *image);
++extern int machine_kexec_setup_resources(struct resource *hypervisor,
++ struct resource *phys_cpus,
++ int nr_phys_cpus);
++extern void machine_kexec_register_resources(struct resource *res);
++
++static int __initdata xen_max_nr_phys_cpus;
++static struct resource xen_hypervisor_res;
++static struct resource *xen_phys_cpus;
++
++size_t vmcoreinfo_size_xen;
++unsigned long paddr_vmcoreinfo_xen;
++
++void __init xen_machine_kexec_setup_resources(void)
++{
++ xen_kexec_range_t range;
++ struct resource *res;
++ int k = 0;
++ int rc;
++
++ if (!is_initial_xendomain())
++ return;
++
++ /* determine maximum number of physical cpus */
++
++ while (1) {
++ memset(&range, 0, sizeof(range));
++ range.range = KEXEC_RANGE_MA_CPU;
++ range.nr = k;
++
++ if(HYPERVISOR_kexec_op(KEXEC_CMD_kexec_get_range, &range))
++ break;
++
++ k++;
++ }
++
++ if (k == 0)
++ return;
++
++ xen_max_nr_phys_cpus = k;
++
++ /* allocate xen_phys_cpus */
++
++ xen_phys_cpus = alloc_bootmem_low(k * sizeof(struct resource));
++ BUG_ON(xen_phys_cpus == NULL);
++
++ /* fill in xen_phys_cpus with per-cpu crash note information */
++
++ for (k = 0; k < xen_max_nr_phys_cpus; k++) {
++ memset(&range, 0, sizeof(range));
++ range.range = KEXEC_RANGE_MA_CPU;
++ range.nr = k;
++
++ if (HYPERVISOR_kexec_op(KEXEC_CMD_kexec_get_range, &range))
++ goto err;
++
++ res = xen_phys_cpus + k;
++
++ memset(res, 0, sizeof(*res));
++ res->name = "Crash note";
++ res->start = range.start;
++ res->end = range.start + range.size - 1;
++ res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
++ }
++
++ /* fill in xen_hypervisor_res with hypervisor machine address range */
++
++ memset(&range, 0, sizeof(range));
++ range.range = KEXEC_RANGE_MA_XEN;
++
++ if (HYPERVISOR_kexec_op(KEXEC_CMD_kexec_get_range, &range))
++ goto err;
++
++ xen_hypervisor_res.name = "Hypervisor code and data";
++ xen_hypervisor_res.start = range.start;
++ xen_hypervisor_res.end = range.start + range.size - 1;
++ xen_hypervisor_res.flags = IORESOURCE_BUSY | IORESOURCE_MEM;
++
++ /* fill in crashk_res if range is reserved by hypervisor */
++
++ memset(&range, 0, sizeof(range));
++ range.range = KEXEC_RANGE_MA_CRASH;
++
++ if (HYPERVISOR_kexec_op(KEXEC_CMD_kexec_get_range, &range))
++ goto err;
++
++ if (range.size) {
++ crashk_res.start = range.start;
++ crashk_res.end = range.start + range.size - 1;
++ }
++
++ /* get physical address of vmcoreinfo */
++ memset(&range, 0, sizeof(range));
++ range.range = KEXEC_RANGE_MA_VMCOREINFO;
++
++ rc = HYPERVISOR_kexec_op(KEXEC_CMD_kexec_get_range, &range);
++
++ if (rc == 0) {
++ /* Hypercall succeeded */
++ vmcoreinfo_size_xen = range.size;
++ paddr_vmcoreinfo_xen = range.start;
++
++ } else {
++ /* Hypercall failed.
++ * Indicate not to create sysfs file by resetting globals
++ */
++ vmcoreinfo_size_xen = 0;
++ paddr_vmcoreinfo_xen = 0;
++
++ /* The KEXEC_CMD_kexec_get_range hypercall did not implement
++ * KEXEC_RANGE_MA_VMCOREINFO until Xen 3.3.
++ * Do not bail out if it fails for this reason.
++ */
++ if (rc != -EINVAL)
++ return;
++ }
++
++ if (machine_kexec_setup_resources(&xen_hypervisor_res, xen_phys_cpus,
++ xen_max_nr_phys_cpus))
++ goto err;
++
++ return;
++
++ err:
++ /*
++ * It isn't possible to free xen_phys_cpus this early in the
++ * boot. Failure at this stage is unexpected and the amount of
++ * memory is small therefore we tolerate the potential leak.
++ */
++ xen_max_nr_phys_cpus = 0;
++ return;
++}
++
++void __init xen_machine_kexec_register_resources(struct resource *res)
++{
++ request_resource(res, &xen_hypervisor_res);
++ machine_kexec_register_resources(res);
++}
++
++static void setup_load_arg(xen_kexec_image_t *xki, struct kimage *image)
++{
++ machine_kexec_setup_load_arg(xki, image);
++
++ xki->indirection_page = image->head;
++ xki->start_address = image->start;
++}
++
++/*
++ * Load the image into xen so xen can kdump itself
++ * This might have been done in prepare, but prepare
++ * is currently called too early. It might make sense
++ * to move prepare, but for now, just add an extra hook.
++ */
++int xen_machine_kexec_load(struct kimage *image)
++{
++ xen_kexec_load_t xkl;
++
++ memset(&xkl, 0, sizeof(xkl));
++ xkl.type = image->type;
++ setup_load_arg(&xkl.image, image);
++ return HYPERVISOR_kexec_op(KEXEC_CMD_kexec_load, &xkl);
++}
++
++/*
++ * Unload the image that was stored by machine_kexec_load()
++ * This might have been done in machine_kexec_cleanup() but it
++ * is called too late, and its possible xen could try and kdump
++ * using resources that have been freed.
++ */
++void xen_machine_kexec_unload(struct kimage *image)
++{
++ xen_kexec_load_t xkl;
++
++ memset(&xkl, 0, sizeof(xkl));
++ xkl.type = image->type;
++ WARN_ON(HYPERVISOR_kexec_op(KEXEC_CMD_kexec_unload, &xkl));
++}
++
++/*
++ * Do not allocate memory (or fail in any way) in machine_kexec().
++ * We are past the point of no return, committed to rebooting now.
++ *
++ * This has the hypervisor move to the prefered reboot CPU,
++ * stop all CPUs and kexec. That is it combines machine_shutdown()
++ * and machine_kexec() in Linux kexec terms.
++ */
++NORET_TYPE void machine_kexec(struct kimage *image)
++{
++ xen_kexec_exec_t xke;
++
++ memset(&xke, 0, sizeof(xke));
++ xke.type = image->type;
++ VOID(HYPERVISOR_kexec_op(KEXEC_CMD_kexec, &xke));
++ panic("KEXEC_CMD_kexec hypercall should not return\n");
++}
++
++void machine_shutdown(void)
++{
++ /* do nothing */
++}
++
++
++/*
++ * Local variables:
++ * c-file-style: "linux"
++ * indent-tabs-mode: t
++ * c-indent-level: 8
++ * c-basic-offset: 8
++ * tab-width: 8
++ * End:
++ */
+Index: head-2008-11-25/drivers/xen/core/machine_reboot.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/machine_reboot.c 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,247 @@
++#include <linux/version.h>
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <linux/unistd.h>
++#include <linux/module.h>
++#include <linux/reboot.h>
++#include <linux/sysrq.h>
++#include <linux/stringify.h>
++#include <linux/stop_machine.h>
++#include <asm/irq.h>
++#include <asm/mmu_context.h>
++#include <xen/evtchn.h>
++#include <asm/hypervisor.h>
++#include <xen/xenbus.h>
++#include <linux/cpu.h>
++#include <xen/gnttab.h>
++#include <xen/xencons.h>
++#include <xen/cpu_hotplug.h>
++#include <xen/interface/vcpu.h>
++
++#if defined(__i386__) || defined(__x86_64__)
++
++/*
++ * Power off function, if any
++ */
++void (*pm_power_off)(void);
++EXPORT_SYMBOL(pm_power_off);
++
++void machine_emergency_restart(void)
++{
++ /* We really want to get pending console data out before we die. */
++ xencons_force_flush();
++ HYPERVISOR_shutdown(SHUTDOWN_reboot);
++}
++
++void machine_restart(char * __unused)
++{
++ machine_emergency_restart();
++}
++
++void machine_halt(void)
++{
++ machine_power_off();
++}
++
++void machine_power_off(void)
++{
++ /* We really want to get pending console data out before we die. */
++ xencons_force_flush();
++ if (pm_power_off)
++ pm_power_off();
++ HYPERVISOR_shutdown(SHUTDOWN_poweroff);
++}
++
++int reboot_thru_bios = 0; /* for dmi_scan.c */
++EXPORT_SYMBOL(machine_restart);
++EXPORT_SYMBOL(machine_halt);
++EXPORT_SYMBOL(machine_power_off);
++
++static void pre_suspend(void)
++{
++ HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
++ WARN_ON(HYPERVISOR_update_va_mapping(fix_to_virt(FIX_SHARED_INFO),
++ __pte_ma(0), 0));
++
++ xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
++ xen_start_info->console.domU.mfn =
++ mfn_to_pfn(xen_start_info->console.domU.mfn);
++}
++
++static void post_suspend(int suspend_cancelled)
++{
++ int i, j, k, fpp;
++ unsigned long shinfo_mfn;
++ extern unsigned long max_pfn;
++ extern unsigned long *pfn_to_mfn_frame_list_list;
++ extern unsigned long *pfn_to_mfn_frame_list[];
++
++ if (suspend_cancelled) {
++ xen_start_info->store_mfn =
++ pfn_to_mfn(xen_start_info->store_mfn);
++ xen_start_info->console.domU.mfn =
++ pfn_to_mfn(xen_start_info->console.domU.mfn);
++ } else {
++#ifdef CONFIG_SMP
++ cpu_initialized_map = cpu_online_map;
++#endif
++ }
++
++ shinfo_mfn = xen_start_info->shared_info >> PAGE_SHIFT;
++ if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_SHARED_INFO),
++ pfn_pte_ma(shinfo_mfn, PAGE_KERNEL),
++ 0))
++ BUG();
++ HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
++
++ memset(empty_zero_page, 0, PAGE_SIZE);
++
++ fpp = PAGE_SIZE/sizeof(unsigned long);
++ for (i = 0, j = 0, k = -1; i < max_pfn; i += fpp, j++) {
++ if ((j % fpp) == 0) {
++ k++;
++ pfn_to_mfn_frame_list_list[k] =
++ virt_to_mfn(pfn_to_mfn_frame_list[k]);
++ j = 0;
++ }
++ pfn_to_mfn_frame_list[k][j] =
++ virt_to_mfn(&phys_to_machine_mapping[i]);
++ }
++ HYPERVISOR_shared_info->arch.max_pfn = max_pfn;
++ HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
++ virt_to_mfn(pfn_to_mfn_frame_list_list);
++}
++
++#else /* !(defined(__i386__) || defined(__x86_64__)) */
++
++#ifndef HAVE_XEN_PRE_SUSPEND
++#define xen_pre_suspend() ((void)0)
++#endif
++
++#ifndef HAVE_XEN_POST_SUSPEND
++#define xen_post_suspend(x) ((void)0)
++#endif
++
++#define switch_idle_mm() ((void)0)
++#define mm_pin_all() ((void)0)
++#define pre_suspend() xen_pre_suspend()
++#define post_suspend(x) xen_post_suspend(x)
++
++#endif
++
++struct suspend {
++ int fast_suspend;
++ void (*resume_notifier)(int);
++};
++
++static int take_machine_down(void *_suspend)
++{
++ struct suspend *suspend = _suspend;
++ int suspend_cancelled, err;
++ extern void time_resume(void);
++
++ if (suspend->fast_suspend) {
++ BUG_ON(!irqs_disabled());
++ } else {
++ BUG_ON(irqs_disabled());
++
++ for (;;) {
++ err = smp_suspend();
++ if (err)
++ return err;
++
++ xenbus_suspend();
++ preempt_disable();
++
++ if (num_online_cpus() == 1)
++ break;
++
++ preempt_enable();
++ xenbus_suspend_cancel();
++ }
++
++ local_irq_disable();
++ }
++
++ mm_pin_all();
++ gnttab_suspend();
++ pre_suspend();
++
++ /*
++ * This hypercall returns 1 if suspend was cancelled or the domain was
++ * merely checkpointed, and 0 if it is resuming in a new domain.
++ */
++ suspend_cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
++
++ suspend->resume_notifier(suspend_cancelled);
++ post_suspend(suspend_cancelled);
++ gnttab_resume();
++ if (!suspend_cancelled) {
++ irq_resume();
++#ifdef __x86_64__
++ /*
++ * Older versions of Xen do not save/restore the user %cr3.
++ * We do it here just in case, but there's no need if we are
++ * in fast-suspend mode as that implies a new enough Xen.
++ */
++ if (!suspend->fast_suspend)
++ xen_new_user_pt(__pa(__user_pgd(
++ current->active_mm->pgd)));
++#endif
++ }
++ time_resume();
++
++ if (!suspend->fast_suspend)
++ local_irq_enable();
++
++ return suspend_cancelled;
++}
++
++int __xen_suspend(int fast_suspend, void (*resume_notifier)(int))
++{
++ int err, suspend_cancelled;
++ struct suspend suspend;
++
++ BUG_ON(smp_processor_id() != 0);
++ BUG_ON(in_interrupt());
++
++#if defined(__i386__) || defined(__x86_64__)
++ if (xen_feature(XENFEAT_auto_translated_physmap)) {
++ printk(KERN_WARNING "Cannot suspend in "
++ "auto_translated_physmap mode.\n");
++ return -EOPNOTSUPP;
++ }
++#endif
++
++ /* If we are definitely UP then 'slow mode' is actually faster. */
++ if (num_possible_cpus() == 1)
++ fast_suspend = 0;
++
++ suspend.fast_suspend = fast_suspend;
++ suspend.resume_notifier = resume_notifier;
++
++ if (fast_suspend) {
++ xenbus_suspend();
++ err = stop_machine_run(take_machine_down, &suspend, 0);
++ if (err < 0)
++ xenbus_suspend_cancel();
++ } else {
++ err = take_machine_down(&suspend);
++ }
++
++ if (err < 0)
++ return err;
++
++ suspend_cancelled = err;
++ if (!suspend_cancelled) {
++ xencons_resume();
++ xenbus_resume();
++ } else {
++ xenbus_suspend_cancel();
++ }
++
++ if (!fast_suspend)
++ smp_resume();
++
++ return 0;
++}
+Index: head-2008-11-25/drivers/xen/core/pci.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/pci.c 2008-11-10 11:44:21.000000000 +0100
+@@ -0,0 +1,59 @@
++/*
++ * vim:shiftwidth=8:noexpandtab
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/pci.h>
++#include <xen/interface/physdev.h>
++
++static int (*pci_bus_probe)(struct device *dev);
++static int (*pci_bus_remove)(struct device *dev);
++
++static int pci_bus_probe_wrapper(struct device *dev)
++{
++ int r;
++ struct pci_dev *pci_dev = to_pci_dev(dev);
++ struct physdev_manage_pci manage_pci;
++ manage_pci.bus = pci_dev->bus->number;
++ manage_pci.devfn = pci_dev->devfn;
++
++ r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add, &manage_pci);
++ if (r && r != -ENOSYS)
++ return r;
++
++ r = pci_bus_probe(dev);
++ return r;
++}
++
++static int pci_bus_remove_wrapper(struct device *dev)
++{
++ int r;
++ struct pci_dev *pci_dev = to_pci_dev(dev);
++ struct physdev_manage_pci manage_pci;
++ manage_pci.bus = pci_dev->bus->number;
++ manage_pci.devfn = pci_dev->devfn;
++
++ r = pci_bus_remove(dev);
++ /* dev and pci_dev are no longer valid!! */
++
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove,
++ &manage_pci));
++ return r;
++}
++
++static int __init hook_pci_bus(void)
++{
++ if (!is_running_on_xen() || !is_initial_xendomain())
++ return 0;
++
++ pci_bus_probe = pci_bus_type.probe;
++ pci_bus_type.probe = pci_bus_probe_wrapper;
++
++ pci_bus_remove = pci_bus_type.remove;
++ pci_bus_type.remove = pci_bus_remove_wrapper;
++
++ return 0;
++}
++
++core_initcall(hook_pci_bus);
+Index: head-2008-11-25/drivers/xen/core/reboot.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/reboot.c 2008-08-07 12:44:36.000000000 +0200
+@@ -0,0 +1,335 @@
++#define __KERNEL_SYSCALLS__
++#include <linux/version.h>
++#include <linux/kernel.h>
++#include <linux/unistd.h>
++#include <linux/module.h>
++#include <linux/reboot.h>
++#include <linux/sysrq.h>
++#include <asm/hypervisor.h>
++#include <xen/xenbus.h>
++#include <xen/evtchn.h>
++#include <linux/kmod.h>
++#include <linux/slab.h>
++#include <linux/workqueue.h>
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++MODULE_LICENSE("Dual BSD/GPL");
++
++#define SHUTDOWN_INVALID -1
++#define SHUTDOWN_POWEROFF 0
++#define SHUTDOWN_SUSPEND 2
++#define SHUTDOWN_RESUMING 3
++#define SHUTDOWN_HALT 4
++
++/* Ignore multiple shutdown requests. */
++static int shutting_down = SHUTDOWN_INVALID;
++
++/* Was last suspend request cancelled? */
++static int suspend_cancelled;
++
++/* Can we leave APs online when we suspend? */
++static int fast_suspend;
++
++static void __shutdown_handler(void *unused);
++static DECLARE_WORK(shutdown_work, __shutdown_handler, NULL);
++
++static int setup_suspend_evtchn(void);
++
++int __xen_suspend(int fast_suspend, void (*resume_notifier)(int));
++
++static int shutdown_process(void *__unused)
++{
++ static char *envp[] = { "HOME=/", "TERM=linux",
++ "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
++ static char *poweroff_argv[] = { "/sbin/poweroff", NULL };
++
++ extern asmlinkage long sys_reboot(int magic1, int magic2,
++ unsigned int cmd, void *arg);
++
++ if ((shutting_down == SHUTDOWN_POWEROFF) ||
++ (shutting_down == SHUTDOWN_HALT)) {
++ if (call_usermodehelper("/sbin/poweroff", poweroff_argv,
++ envp, 0) < 0) {
++#ifdef CONFIG_XEN
++ sys_reboot(LINUX_REBOOT_MAGIC1,
++ LINUX_REBOOT_MAGIC2,
++ LINUX_REBOOT_CMD_POWER_OFF,
++ NULL);
++#endif /* CONFIG_XEN */
++ }
++ }
++
++ shutting_down = SHUTDOWN_INVALID; /* could try again */
++
++ return 0;
++}
++
++static void xen_resume_notifier(int _suspend_cancelled)
++{
++ int old_state = xchg(&shutting_down, SHUTDOWN_RESUMING);
++ BUG_ON(old_state != SHUTDOWN_SUSPEND);
++ suspend_cancelled = _suspend_cancelled;
++}
++
++static int xen_suspend(void *__unused)
++{
++ int err, old_state;
++
++ daemonize("suspend");
++ err = set_cpus_allowed(current, cpumask_of_cpu(0));
++ if (err) {
++ printk(KERN_ERR "Xen suspend can't run on CPU0 (%d)\n", err);
++ goto fail;
++ }
++
++ do {
++ err = __xen_suspend(fast_suspend, xen_resume_notifier);
++ if (err) {
++ printk(KERN_ERR "Xen suspend failed (%d)\n", err);
++ goto fail;
++ }
++ if (!suspend_cancelled)
++ setup_suspend_evtchn();
++ old_state = cmpxchg(
++ &shutting_down, SHUTDOWN_RESUMING, SHUTDOWN_INVALID);
++ } while (old_state == SHUTDOWN_SUSPEND);
++
++ switch (old_state) {
++ case SHUTDOWN_INVALID:
++ case SHUTDOWN_SUSPEND:
++ BUG();
++ case SHUTDOWN_RESUMING:
++ break;
++ default:
++ schedule_work(&shutdown_work);
++ break;
++ }
++
++ return 0;
++
++ fail:
++ old_state = xchg(&shutting_down, SHUTDOWN_INVALID);
++ BUG_ON(old_state != SHUTDOWN_SUSPEND);
++ return 0;
++}
++
++static void switch_shutdown_state(int new_state)
++{
++ int prev_state, old_state = SHUTDOWN_INVALID;
++
++ /* We only drive shutdown_state into an active state. */
++ if (new_state == SHUTDOWN_INVALID)
++ return;
++
++ do {
++ /* We drop this transition if already in an active state. */
++ if ((old_state != SHUTDOWN_INVALID) &&
++ (old_state != SHUTDOWN_RESUMING))
++ return;
++ /* Attempt to transition. */
++ prev_state = old_state;
++ old_state = cmpxchg(&shutting_down, old_state, new_state);
++ } while (old_state != prev_state);
++
++ /* Either we kick off the work, or we leave it to xen_suspend(). */
++ if (old_state == SHUTDOWN_INVALID)
++ schedule_work(&shutdown_work);
++ else
++ BUG_ON(old_state != SHUTDOWN_RESUMING);
++}
++
++static void __shutdown_handler(void *unused)
++{
++ int err;
++
++ err = kernel_thread((shutting_down == SHUTDOWN_SUSPEND) ?
++ xen_suspend : shutdown_process,
++ NULL, CLONE_FS | CLONE_FILES);
++
++ if (err < 0) {
++ printk(KERN_WARNING "Error creating shutdown process (%d): "
++ "retrying...\n", -err);
++ schedule_delayed_work(&shutdown_work, HZ/2);
++ }
++}
++
++static void shutdown_handler(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ extern void ctrl_alt_del(void);
++ char *str;
++ struct xenbus_transaction xbt;
++ int err, new_state = SHUTDOWN_INVALID;
++
++ if ((shutting_down != SHUTDOWN_INVALID) &&
++ (shutting_down != SHUTDOWN_RESUMING))
++ return;
++
++ again:
++ err = xenbus_transaction_start(&xbt);
++ if (err)
++ return;
++
++ str = (char *)xenbus_read(xbt, "control", "shutdown", NULL);
++ /* Ignore read errors and empty reads. */
++ if (XENBUS_IS_ERR_READ(str)) {
++ xenbus_transaction_end(xbt, 1);
++ return;
++ }
++
++ xenbus_write(xbt, "control", "shutdown", "");
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err == -EAGAIN) {
++ kfree(str);
++ goto again;
++ }
++
++ if (strcmp(str, "poweroff") == 0)
++ new_state = SHUTDOWN_POWEROFF;
++ else if (strcmp(str, "reboot") == 0)
++ ctrl_alt_del();
++ else if (strcmp(str, "suspend") == 0)
++ new_state = SHUTDOWN_SUSPEND;
++ else if (strcmp(str, "halt") == 0)
++ new_state = SHUTDOWN_HALT;
++ else
++ printk("Ignoring shutdown request: %s\n", str);
++
++ switch_shutdown_state(new_state);
++
++ kfree(str);
++}
++
++static void sysrq_handler(struct xenbus_watch *watch, const char **vec,
++ unsigned int len)
++{
++ char sysrq_key = '\0';
++ struct xenbus_transaction xbt;
++ int err;
++
++ again:
++ err = xenbus_transaction_start(&xbt);
++ if (err)
++ return;
++ if (!xenbus_scanf(xbt, "control", "sysrq", "%c", &sysrq_key)) {
++ printk(KERN_ERR "Unable to read sysrq code in "
++ "control/sysrq\n");
++ xenbus_transaction_end(xbt, 1);
++ return;
++ }
++
++ if (sysrq_key != '\0')
++ xenbus_printf(xbt, "control", "sysrq", "%c", '\0');
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err == -EAGAIN)
++ goto again;
++
++#ifdef CONFIG_MAGIC_SYSRQ
++ if (sysrq_key != '\0')
++ handle_sysrq(sysrq_key, NULL, NULL);
++#endif
++}
++
++static struct xenbus_watch shutdown_watch = {
++ .node = "control/shutdown",
++ .callback = shutdown_handler
++};
++
++static struct xenbus_watch sysrq_watch = {
++ .node = "control/sysrq",
++ .callback = sysrq_handler
++};
++
++static irqreturn_t suspend_int(int irq, void* dev_id, struct pt_regs *ptregs)
++{
++ switch_shutdown_state(SHUTDOWN_SUSPEND);
++ return IRQ_HANDLED;
++}
++
++static int setup_suspend_evtchn(void)
++{
++ static int irq;
++ int port;
++ char portstr[16];
++
++ if (irq > 0)
++ unbind_from_irqhandler(irq, NULL);
++
++ irq = bind_listening_port_to_irqhandler(0, suspend_int, 0, "suspend",
++ NULL);
++ if (irq <= 0)
++ return -1;
++
++ port = irq_to_evtchn_port(irq);
++ printk(KERN_INFO "suspend: event channel %d\n", port);
++ sprintf(portstr, "%d", port);
++ xenbus_write(XBT_NIL, "device/suspend", "event-channel", portstr);
++
++ return 0;
++}
++
++static int setup_shutdown_watcher(void)
++{
++ int err;
++
++ xenbus_scanf(XBT_NIL, "control",
++ "platform-feature-multiprocessor-suspend",
++ "%d", &fast_suspend);
++
++ err = register_xenbus_watch(&shutdown_watch);
++ if (err) {
++ printk(KERN_ERR "Failed to set shutdown watcher\n");
++ return err;
++ }
++
++ err = register_xenbus_watch(&sysrq_watch);
++ if (err) {
++ printk(KERN_ERR "Failed to set sysrq watcher\n");
++ return err;
++ }
++
++ /* suspend event channel */
++ err = setup_suspend_evtchn();
++ if (err) {
++ printk(KERN_ERR "Failed to register suspend event channel\n");
++ return err;
++ }
++
++ return 0;
++}
++
++#ifdef CONFIG_XEN
++
++static int shutdown_event(struct notifier_block *notifier,
++ unsigned long event,
++ void *data)
++{
++ setup_shutdown_watcher();
++ return NOTIFY_DONE;
++}
++
++static int __init setup_shutdown_event(void)
++{
++ static struct notifier_block xenstore_notifier = {
++ .notifier_call = shutdown_event
++ };
++ register_xenstore_notifier(&xenstore_notifier);
++
++ return 0;
++}
++
++subsys_initcall(setup_shutdown_event);
++
++#else /* !defined(CONFIG_XEN) */
++
++int xen_reboot_init(void)
++{
++ return setup_shutdown_watcher();
++}
++
++#endif /* !defined(CONFIG_XEN) */
+Index: head-2008-11-25/drivers/xen/core/smpboot.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/smpboot.c 2008-03-06 08:54:32.000000000 +0100
+@@ -0,0 +1,464 @@
++/*
++ * Xen SMP booting functions
++ *
++ * See arch/i386/kernel/smpboot.c for copyright and credits for derived
++ * portions of this file.
++ */
++
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <linux/sched.h>
++#include <linux/kernel_stat.h>
++#include <linux/smp_lock.h>
++#include <linux/irq.h>
++#include <linux/bootmem.h>
++#include <linux/notifier.h>
++#include <linux/cpu.h>
++#include <linux/percpu.h>
++#include <asm/desc.h>
++#include <asm/arch_hooks.h>
++#include <asm/pgalloc.h>
++#include <xen/evtchn.h>
++#include <xen/interface/vcpu.h>
++#include <xen/cpu_hotplug.h>
++#include <xen/xenbus.h>
++
++extern irqreturn_t smp_reschedule_interrupt(int, void *, struct pt_regs *);
++extern irqreturn_t smp_call_function_interrupt(int, void *, struct pt_regs *);
++
++extern int local_setup_timer(unsigned int cpu);
++extern void local_teardown_timer(unsigned int cpu);
++
++extern void hypervisor_callback(void);
++extern void failsafe_callback(void);
++extern void system_call(void);
++extern void smp_trap_init(trap_info_t *);
++
++/* Number of siblings per CPU package */
++int smp_num_siblings = 1;
++
++cpumask_t cpu_online_map;
++EXPORT_SYMBOL(cpu_online_map);
++cpumask_t cpu_possible_map;
++EXPORT_SYMBOL(cpu_possible_map);
++cpumask_t cpu_initialized_map;
++
++struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
++EXPORT_SYMBOL(cpu_data);
++
++#ifdef CONFIG_HOTPLUG_CPU
++DEFINE_PER_CPU(int, cpu_state) = { 0 };
++#endif
++
++static DEFINE_PER_CPU(int, resched_irq);
++static DEFINE_PER_CPU(int, callfunc_irq);
++static char resched_name[NR_CPUS][15];
++static char callfunc_name[NR_CPUS][15];
++
++u8 cpu_2_logical_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
++
++cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
++cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned;
++EXPORT_SYMBOL(cpu_core_map);
++
++#if defined(__i386__)
++u8 x86_cpu_to_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = 0xff };
++EXPORT_SYMBOL(x86_cpu_to_apicid);
++#elif !defined(CONFIG_X86_IO_APIC)
++unsigned int maxcpus = NR_CPUS;
++#endif
++
++void __init prefill_possible_map(void)
++{
++ int i, rc;
++
++ for_each_possible_cpu(i)
++ if (i != smp_processor_id())
++ return;
++
++ for (i = 0; i < NR_CPUS; i++) {
++ rc = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL);
++ if (rc >= 0)
++ cpu_set(i, cpu_possible_map);
++ }
++}
++
++void __init smp_alloc_memory(void)
++{
++}
++
++static inline void
++set_cpu_sibling_map(unsigned int cpu)
++{
++ cpu_data[cpu].phys_proc_id = cpu;
++ cpu_data[cpu].cpu_core_id = 0;
++
++ cpu_sibling_map[cpu] = cpumask_of_cpu(cpu);
++ cpu_core_map[cpu] = cpumask_of_cpu(cpu);
++
++ cpu_data[cpu].booted_cores = 1;
++}
++
++static void
++remove_siblinginfo(unsigned int cpu)
++{
++ cpu_data[cpu].phys_proc_id = BAD_APICID;
++ cpu_data[cpu].cpu_core_id = BAD_APICID;
++
++ cpus_clear(cpu_sibling_map[cpu]);
++ cpus_clear(cpu_core_map[cpu]);
++
++ cpu_data[cpu].booted_cores = 0;
++}
++
++static int __cpuinit xen_smp_intr_init(unsigned int cpu)
++{
++ int rc;
++
++ per_cpu(resched_irq, cpu) = per_cpu(callfunc_irq, cpu) = -1;
++
++ sprintf(resched_name[cpu], "resched%u", cpu);
++ rc = bind_ipi_to_irqhandler(RESCHEDULE_VECTOR,
++ cpu,
++ smp_reschedule_interrupt,
++ SA_INTERRUPT,
++ resched_name[cpu],
++ NULL);
++ if (rc < 0)
++ goto fail;
++ per_cpu(resched_irq, cpu) = rc;
++
++ sprintf(callfunc_name[cpu], "callfunc%u", cpu);
++ rc = bind_ipi_to_irqhandler(CALL_FUNCTION_VECTOR,
++ cpu,
++ smp_call_function_interrupt,
++ SA_INTERRUPT,
++ callfunc_name[cpu],
++ NULL);
++ if (rc < 0)
++ goto fail;
++ per_cpu(callfunc_irq, cpu) = rc;
++
++ if ((cpu != 0) && ((rc = local_setup_timer(cpu)) != 0))
++ goto fail;
++
++ return 0;
++
++ fail:
++ if (per_cpu(resched_irq, cpu) >= 0)
++ unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
++ if (per_cpu(callfunc_irq, cpu) >= 0)
++ unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
++ return rc;
++}
++
++#ifdef CONFIG_HOTPLUG_CPU
++static void xen_smp_intr_exit(unsigned int cpu)
++{
++ if (cpu != 0)
++ local_teardown_timer(cpu);
++
++ unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
++ unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
++}
++#endif
++
++void __cpuinit cpu_bringup(void)
++{
++ cpu_init();
++ identify_cpu(cpu_data + smp_processor_id());
++ touch_softlockup_watchdog();
++ preempt_disable();
++ local_irq_enable();
++}
++
++static void __cpuinit cpu_bringup_and_idle(void)
++{
++ cpu_bringup();
++ cpu_idle();
++}
++
++static void __cpuinit cpu_initialize_context(unsigned int cpu)
++{
++ /* vcpu_guest_context_t is too large to allocate on the stack.
++ * Hence we allocate statically and protect it with a lock */
++ static vcpu_guest_context_t ctxt;
++ static DEFINE_SPINLOCK(ctxt_lock);
++
++ struct task_struct *idle = idle_task(cpu);
++#ifdef __x86_64__
++ struct desc_ptr *gdt_descr = &cpu_gdt_descr[cpu];
++#else
++ struct Xgt_desc_struct *gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++#endif
++
++ if (cpu_test_and_set(cpu, cpu_initialized_map))
++ return;
++
++ spin_lock(&ctxt_lock);
++
++ memset(&ctxt, 0, sizeof(ctxt));
++
++ ctxt.flags = VGCF_IN_KERNEL;
++ ctxt.user_regs.ds = __USER_DS;
++ ctxt.user_regs.es = __USER_DS;
++ ctxt.user_regs.fs = 0;
++ ctxt.user_regs.gs = 0;
++ ctxt.user_regs.ss = __KERNEL_DS;
++ ctxt.user_regs.eip = (unsigned long)cpu_bringup_and_idle;
++ ctxt.user_regs.eflags = X86_EFLAGS_IF | 0x1000; /* IOPL_RING1 */
++
++ memset(&ctxt.fpu_ctxt, 0, sizeof(ctxt.fpu_ctxt));
++
++ smp_trap_init(ctxt.trap_ctxt);
++
++ ctxt.ldt_ents = 0;
++
++ ctxt.gdt_frames[0] = virt_to_mfn(gdt_descr->address);
++ ctxt.gdt_ents = gdt_descr->size / 8;
++
++#ifdef __i386__
++ ctxt.user_regs.cs = __KERNEL_CS;
++ ctxt.user_regs.esp = idle->thread.esp0 - sizeof(struct pt_regs);
++
++ ctxt.kernel_ss = __KERNEL_DS;
++ ctxt.kernel_sp = idle->thread.esp0;
++
++ ctxt.event_callback_cs = __KERNEL_CS;
++ ctxt.event_callback_eip = (unsigned long)hypervisor_callback;
++ ctxt.failsafe_callback_cs = __KERNEL_CS;
++ ctxt.failsafe_callback_eip = (unsigned long)failsafe_callback;
++
++ ctxt.ctrlreg[3] = xen_pfn_to_cr3(virt_to_mfn(swapper_pg_dir));
++#else /* __x86_64__ */
++ ctxt.user_regs.cs = __KERNEL_CS;
++ ctxt.user_regs.esp = idle->thread.rsp0 - sizeof(struct pt_regs);
++
++ ctxt.kernel_ss = __KERNEL_DS;
++ ctxt.kernel_sp = idle->thread.rsp0;
++
++ ctxt.event_callback_eip = (unsigned long)hypervisor_callback;
++ ctxt.failsafe_callback_eip = (unsigned long)failsafe_callback;
++ ctxt.syscall_callback_eip = (unsigned long)system_call;
++
++ ctxt.ctrlreg[3] = xen_pfn_to_cr3(virt_to_mfn(init_level4_pgt));
++
++ ctxt.gs_base_kernel = (unsigned long)(cpu_pda(cpu));
++#endif
++
++ if (HYPERVISOR_vcpu_op(VCPUOP_initialise, cpu, &ctxt))
++ BUG();
++
++ spin_unlock(&ctxt_lock);
++}
++
++void __init smp_prepare_cpus(unsigned int max_cpus)
++{
++ unsigned int cpu;
++ struct task_struct *idle;
++ int apicid, acpiid;
++ struct vcpu_get_physid cpu_id;
++#ifdef __x86_64__
++ struct desc_ptr *gdt_descr;
++#else
++ struct Xgt_desc_struct *gdt_descr;
++#endif
++
++ apicid = 0;
++ if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, 0, &cpu_id) == 0) {
++ apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id);
++ acpiid = xen_vcpu_physid_to_x86_acpiid(cpu_id.phys_id);
++#ifdef CONFIG_ACPI
++ if (acpiid != 0xff)
++ x86_acpiid_to_apicid[acpiid] = apicid;
++#endif
++ }
++ boot_cpu_data.apicid = apicid;
++ cpu_data[0] = boot_cpu_data;
++
++ cpu_2_logical_apicid[0] = apicid;
++ x86_cpu_to_apicid[0] = apicid;
++
++ current_thread_info()->cpu = 0;
++
++ for (cpu = 0; cpu < NR_CPUS; cpu++) {
++ cpus_clear(cpu_sibling_map[cpu]);
++ cpus_clear(cpu_core_map[cpu]);
++ }
++
++ set_cpu_sibling_map(0);
++
++ if (xen_smp_intr_init(0))
++ BUG();
++
++ cpu_initialized_map = cpumask_of_cpu(0);
++
++ /* Restrict the possible_map according to max_cpus. */
++ while ((num_possible_cpus() > 1) && (num_possible_cpus() > max_cpus)) {
++ for (cpu = NR_CPUS-1; !cpu_isset(cpu, cpu_possible_map); cpu--)
++ continue;
++ cpu_clear(cpu, cpu_possible_map);
++ }
++
++ for_each_possible_cpu (cpu) {
++ if (cpu == 0)
++ continue;
++
++#ifdef __x86_64__
++ gdt_descr = &cpu_gdt_descr[cpu];
++#else
++ gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++#endif
++ gdt_descr->address = get_zeroed_page(GFP_KERNEL);
++ if (unlikely(!gdt_descr->address)) {
++ printk(KERN_CRIT "CPU%d failed to allocate GDT\n",
++ cpu);
++ continue;
++ }
++ gdt_descr->size = GDT_SIZE;
++ memcpy((void *)gdt_descr->address, cpu_gdt_table, GDT_SIZE);
++ make_page_readonly(
++ (void *)gdt_descr->address,
++ XENFEAT_writable_descriptor_tables);
++
++ apicid = cpu;
++ if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, cpu, &cpu_id) == 0) {
++ apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id);
++ acpiid = xen_vcpu_physid_to_x86_acpiid(cpu_id.phys_id);
++#ifdef CONFIG_ACPI
++ if (acpiid != 0xff)
++ x86_acpiid_to_apicid[acpiid] = apicid;
++#endif
++ }
++ cpu_data[cpu] = boot_cpu_data;
++ cpu_data[cpu].apicid = apicid;
++
++ cpu_2_logical_apicid[cpu] = apicid;
++ x86_cpu_to_apicid[cpu] = apicid;
++
++ idle = fork_idle(cpu);
++ if (IS_ERR(idle))
++ panic("failed fork for CPU %d", cpu);
++
++#ifdef __x86_64__
++ cpu_pda(cpu)->pcurrent = idle;
++ cpu_pda(cpu)->cpunumber = cpu;
++ clear_ti_thread_flag(idle->thread_info, TIF_FORK);
++#endif
++
++ irq_ctx_init(cpu);
++
++#ifdef CONFIG_HOTPLUG_CPU
++ if (is_initial_xendomain())
++ cpu_set(cpu, cpu_present_map);
++#else
++ cpu_set(cpu, cpu_present_map);
++#endif
++ }
++
++ init_xenbus_allowed_cpumask();
++
++#ifdef CONFIG_X86_IO_APIC
++ /*
++ * Here we can be sure that there is an IO-APIC in the system. Let's
++ * go and set it up:
++ */
++ if (!skip_ioapic_setup && nr_ioapics)
++ setup_IO_APIC();
++#endif
++}
++
++void __devinit smp_prepare_boot_cpu(void)
++{
++ prefill_possible_map();
++}
++
++#ifdef CONFIG_HOTPLUG_CPU
++
++/*
++ * Initialize cpu_present_map late to skip SMP boot code in init/main.c.
++ * But do it early enough to catch critical for_each_present_cpu() loops
++ * in i386-specific code.
++ */
++static int __init initialize_cpu_present_map(void)
++{
++ cpu_present_map = cpu_possible_map;
++ return 0;
++}
++core_initcall(initialize_cpu_present_map);
++
++int __cpu_disable(void)
++{
++ cpumask_t map = cpu_online_map;
++ unsigned int cpu = smp_processor_id();
++
++ if (cpu == 0)
++ return -EBUSY;
++
++ remove_siblinginfo(cpu);
++
++ cpu_clear(cpu, map);
++ fixup_irqs(map);
++ cpu_clear(cpu, cpu_online_map);
++
++ return 0;
++}
++
++void __cpu_die(unsigned int cpu)
++{
++ while (HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL)) {
++ current->state = TASK_UNINTERRUPTIBLE;
++ schedule_timeout(HZ/10);
++ }
++
++ xen_smp_intr_exit(cpu);
++
++ if (num_online_cpus() == 1)
++ alternatives_smp_switch(0);
++}
++
++#endif /* CONFIG_HOTPLUG_CPU */
++
++int __cpuinit __cpu_up(unsigned int cpu)
++{
++ int rc;
++
++ rc = cpu_up_check(cpu);
++ if (rc)
++ return rc;
++
++ cpu_initialize_context(cpu);
++
++ if (num_online_cpus() == 1)
++ alternatives_smp_switch(1);
++
++ /* This must be done before setting cpu_online_map */
++ set_cpu_sibling_map(cpu);
++ wmb();
++
++ rc = xen_smp_intr_init(cpu);
++ if (rc) {
++ remove_siblinginfo(cpu);
++ return rc;
++ }
++
++ cpu_set(cpu, cpu_online_map);
++
++ rc = HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL);
++ BUG_ON(rc);
++
++ return 0;
++}
++
++void __init smp_cpus_done(unsigned int max_cpus)
++{
++}
++
++#ifndef CONFIG_X86_LOCAL_APIC
++int setup_profiling_timer(unsigned int multiplier)
++{
++ return -EINVAL;
++}
++#endif
+Index: head-2008-11-25/drivers/xen/core/xen_proc.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/xen_proc.c 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,23 @@
++
++#include <linux/module.h>
++#include <linux/proc_fs.h>
++#include <xen/xen_proc.h>
++
++static struct proc_dir_entry *xen_base;
++
++struct proc_dir_entry *create_xen_proc_entry(const char *name, mode_t mode)
++{
++ if ( xen_base == NULL )
++ if ( (xen_base = proc_mkdir("xen", &proc_root)) == NULL )
++ panic("Couldn't create /proc/xen");
++ return create_proc_entry(name, mode, xen_base);
++}
++
++EXPORT_SYMBOL_GPL(create_xen_proc_entry);
++
++void remove_xen_proc_entry(const char *name)
++{
++ remove_proc_entry(name, xen_base);
++}
++
++EXPORT_SYMBOL_GPL(remove_xen_proc_entry);
+Index: head-2008-11-25/drivers/xen/core/xen_sysfs.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/xen_sysfs.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,427 @@
++/*
++ * copyright (c) 2006 IBM Corporation
++ * Authored by: Mike D. Day <ncmike@us.ibm.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include <linux/err.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <asm/hypervisor.h>
++#include <xen/features.h>
++#include <xen/hypervisor_sysfs.h>
++#include <xen/xenbus.h>
++#include <xen/interface/kexec.h>
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Mike D. Day <ncmike@us.ibm.com>");
++
++static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ return sprintf(buffer, "xen\n");
++}
++
++HYPERVISOR_ATTR_RO(type);
++
++static int __init xen_sysfs_type_init(void)
++{
++ return sysfs_create_file(&hypervisor_subsys.kset.kobj, &type_attr.attr);
++}
++
++static void xen_sysfs_type_destroy(void)
++{
++ sysfs_remove_file(&hypervisor_subsys.kset.kobj, &type_attr.attr);
++}
++
++/* xen version attributes */
++static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int version = HYPERVISOR_xen_version(XENVER_version, NULL);
++ if (version)
++ return sprintf(buffer, "%d\n", version >> 16);
++ return -ENODEV;
++}
++
++HYPERVISOR_ATTR_RO(major);
++
++static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int version = HYPERVISOR_xen_version(XENVER_version, NULL);
++ if (version)
++ return sprintf(buffer, "%d\n", version & 0xff);
++ return -ENODEV;
++}
++
++HYPERVISOR_ATTR_RO(minor);
++
++static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int ret = -ENOMEM;
++ char *extra;
++
++ extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
++ if (extra) {
++ ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
++ if (!ret)
++ ret = sprintf(buffer, "%s\n", extra);
++ kfree(extra);
++ }
++
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(extra);
++
++static struct attribute *version_attrs[] = {
++ &major_attr.attr,
++ &minor_attr.attr,
++ &extra_attr.attr,
++ NULL
++};
++
++static struct attribute_group version_group = {
++ .name = "version",
++ .attrs = version_attrs,
++};
++
++static int __init xen_sysfs_version_init(void)
++{
++ return sysfs_create_group(&hypervisor_subsys.kset.kobj,
++ &version_group);
++}
++
++static void xen_sysfs_version_destroy(void)
++{
++ sysfs_remove_group(&hypervisor_subsys.kset.kobj, &version_group);
++}
++
++/* UUID */
++
++static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ char *vm, *val;
++ int ret;
++ extern int xenstored_ready;
++
++ if (!xenstored_ready)
++ return -EBUSY;
++
++ vm = xenbus_read(XBT_NIL, "vm", "", NULL);
++ if (IS_ERR(vm))
++ return PTR_ERR(vm);
++ val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
++ kfree(vm);
++ if (IS_ERR(val))
++ return PTR_ERR(val);
++ ret = sprintf(buffer, "%s\n", val);
++ kfree(val);
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(uuid);
++
++static int __init xen_sysfs_uuid_init(void)
++{
++ return sysfs_create_file(&hypervisor_subsys.kset.kobj, &uuid_attr.attr);
++}
++
++static void xen_sysfs_uuid_destroy(void)
++{
++ sysfs_remove_file(&hypervisor_subsys.kset.kobj, &uuid_attr.attr);
++}
++
++/* xen compilation attributes */
++
++static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int ret = -ENOMEM;
++ struct xen_compile_info *info;
++
++ info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
++ if (info) {
++ ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
++ if (!ret)
++ ret = sprintf(buffer, "%s\n", info->compiler);
++ kfree(info);
++ }
++
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(compiler);
++
++static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int ret = -ENOMEM;
++ struct xen_compile_info *info;
++
++ info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
++ if (info) {
++ ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
++ if (!ret)
++ ret = sprintf(buffer, "%s\n", info->compile_by);
++ kfree(info);
++ }
++
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(compiled_by);
++
++static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int ret = -ENOMEM;
++ struct xen_compile_info *info;
++
++ info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
++ if (info) {
++ ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
++ if (!ret)
++ ret = sprintf(buffer, "%s\n", info->compile_date);
++ kfree(info);
++ }
++
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(compile_date);
++
++static struct attribute *xen_compile_attrs[] = {
++ &compiler_attr.attr,
++ &compiled_by_attr.attr,
++ &compile_date_attr.attr,
++ NULL
++};
++
++static struct attribute_group xen_compilation_group = {
++ .name = "compilation",
++ .attrs = xen_compile_attrs,
++};
++
++int __init static xen_compilation_init(void)
++{
++ return sysfs_create_group(&hypervisor_subsys.kset.kobj,
++ &xen_compilation_group);
++}
++
++static void xen_compilation_destroy(void)
++{
++ sysfs_remove_group(&hypervisor_subsys.kset.kobj,
++ &xen_compilation_group);
++}
++
++/* xen properties info */
++
++static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int ret = -ENOMEM;
++ char *caps;
++
++ caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
++ if (caps) {
++ ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
++ if (!ret)
++ ret = sprintf(buffer, "%s\n", caps);
++ kfree(caps);
++ }
++
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(capabilities);
++
++static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int ret = -ENOMEM;
++ char *cset;
++
++ cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
++ if (cset) {
++ ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
++ if (!ret)
++ ret = sprintf(buffer, "%s\n", cset);
++ kfree(cset);
++ }
++
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(changeset);
++
++static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int ret = -ENOMEM;
++ struct xen_platform_parameters *parms;
++
++ parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
++ if (parms) {
++ ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
++ parms);
++ if (!ret)
++ ret = sprintf(buffer, "%lx\n", parms->virt_start);
++ kfree(parms);
++ }
++
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(virtual_start);
++
++static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ int ret;
++
++ ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
++ if (ret > 0)
++ ret = sprintf(buffer, "%x\n", ret);
++
++ return ret;
++}
++
++HYPERVISOR_ATTR_RO(pagesize);
++
++/* eventually there will be several more features to export */
++static ssize_t xen_feature_show(int index, char *buffer)
++{
++ int ret = -ENOMEM;
++ struct xen_feature_info *info;
++
++ info = kmalloc(sizeof(struct xen_feature_info), GFP_KERNEL);
++ if (info) {
++ info->submap_idx = index;
++ ret = HYPERVISOR_xen_version(XENVER_get_features, info);
++ if (!ret)
++ ret = sprintf(buffer, "%d\n", info->submap);
++ kfree(info);
++ }
++
++ return ret;
++}
++
++static ssize_t writable_pt_show(struct hyp_sysfs_attr *attr, char *buffer)
++{
++ return xen_feature_show(XENFEAT_writable_page_tables, buffer);
++}
++
++HYPERVISOR_ATTR_RO(writable_pt);
++
++static struct attribute *xen_properties_attrs[] = {
++ &capabilities_attr.attr,
++ &changeset_attr.attr,
++ &virtual_start_attr.attr,
++ &pagesize_attr.attr,
++ &writable_pt_attr.attr,
++ NULL
++};
++
++static struct attribute_group xen_properties_group = {
++ .name = "properties",
++ .attrs = xen_properties_attrs,
++};
++
++static int __init xen_properties_init(void)
++{
++ return sysfs_create_group(&hypervisor_subsys.kset.kobj,
++ &xen_properties_group);
++}
++
++static void xen_properties_destroy(void)
++{
++ sysfs_remove_group(&hypervisor_subsys.kset.kobj,
++ &xen_properties_group);
++}
++
++#ifdef CONFIG_KEXEC
++
++extern size_t vmcoreinfo_size_xen;
++extern unsigned long paddr_vmcoreinfo_xen;
++
++static ssize_t vmcoreinfo_show(struct hyp_sysfs_attr *attr, char *page)
++{
++ return sprintf(page, "%lx %zx\n",
++ paddr_vmcoreinfo_xen, vmcoreinfo_size_xen);
++}
++
++HYPERVISOR_ATTR_RO(vmcoreinfo);
++
++static int __init xen_sysfs_vmcoreinfo_init(void)
++{
++ return sysfs_create_file(&hypervisor_subsys.kset.kobj,
++ &vmcoreinfo_attr.attr);
++}
++
++static void xen_sysfs_vmcoreinfo_destroy(void)
++{
++ sysfs_remove_file(&hypervisor_subsys.kset.kobj, &vmcoreinfo_attr.attr);
++}
++
++#endif
++
++static int __init hyper_sysfs_init(void)
++{
++ int ret;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ ret = xen_sysfs_type_init();
++ if (ret)
++ goto out;
++ ret = xen_sysfs_version_init();
++ if (ret)
++ goto version_out;
++ ret = xen_compilation_init();
++ if (ret)
++ goto comp_out;
++ ret = xen_sysfs_uuid_init();
++ if (ret)
++ goto uuid_out;
++ ret = xen_properties_init();
++ if (ret)
++ goto prop_out;
++#ifdef CONFIG_KEXEC
++ if (vmcoreinfo_size_xen != 0) {
++ ret = xen_sysfs_vmcoreinfo_init();
++ if (ret)
++ goto vmcoreinfo_out;
++ }
++#endif
++
++ goto out;
++
++#ifdef CONFIG_KEXEC
++vmcoreinfo_out:
++#endif
++ xen_properties_destroy();
++prop_out:
++ xen_sysfs_uuid_destroy();
++uuid_out:
++ xen_compilation_destroy();
++comp_out:
++ xen_sysfs_version_destroy();
++version_out:
++ xen_sysfs_type_destroy();
++out:
++ return ret;
++}
++
++static void __exit hyper_sysfs_exit(void)
++{
++#ifdef CONFIG_KEXEC
++ if (vmcoreinfo_size_xen != 0)
++ xen_sysfs_vmcoreinfo_destroy();
++#endif
++ xen_properties_destroy();
++ xen_compilation_destroy();
++ xen_sysfs_uuid_destroy();
++ xen_sysfs_version_destroy();
++ xen_sysfs_type_destroy();
++
++}
++
++module_init(hyper_sysfs_init);
++module_exit(hyper_sysfs_exit);
+Index: head-2008-11-25/drivers/xen/core/xencomm.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/core/xencomm.c 2007-11-12 08:41:05.000000000 +0100
+@@ -0,0 +1,229 @@
++/*
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Copyright (C) IBM Corp. 2006
++ *
++ * Authors: Hollis Blanchard <hollisb@us.ibm.com>
++ */
++
++#include <linux/gfp.h>
++#include <linux/mm.h>
++#include <asm/page.h>
++#include <xen/xencomm.h>
++#include <xen/interface/xen.h>
++#ifdef __ia64__
++#include <asm/xen/xencomm.h> /* for is_kern_addr() */
++#endif
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++static int xencomm_init(struct xencomm_desc *desc,
++ void *buffer, unsigned long bytes)
++{
++ unsigned long recorded = 0;
++ int i = 0;
++
++ while ((recorded < bytes) && (i < desc->nr_addrs)) {
++ unsigned long vaddr = (unsigned long)buffer + recorded;
++ unsigned long paddr;
++ int offset;
++ int chunksz;
++
++ offset = vaddr % PAGE_SIZE; /* handle partial pages */
++ chunksz = min(PAGE_SIZE - offset, bytes - recorded);
++
++ paddr = xencomm_vtop(vaddr);
++ if (paddr == ~0UL) {
++ printk("%s: couldn't translate vaddr %lx\n",
++ __func__, vaddr);
++ return -EINVAL;
++ }
++
++ desc->address[i++] = paddr;
++ recorded += chunksz;
++ }
++
++ if (recorded < bytes) {
++ printk("%s: could only translate %ld of %ld bytes\n",
++ __func__, recorded, bytes);
++ return -ENOSPC;
++ }
++
++ /* mark remaining addresses invalid (just for safety) */
++ while (i < desc->nr_addrs)
++ desc->address[i++] = XENCOMM_INVALID;
++
++ desc->magic = XENCOMM_MAGIC;
++
++ return 0;
++}
++
++static struct xencomm_desc *xencomm_alloc(gfp_t gfp_mask,
++ void *buffer, unsigned long bytes)
++{
++ struct xencomm_desc *desc;
++ unsigned long buffer_ulong = (unsigned long)buffer;
++ unsigned long start = buffer_ulong & PAGE_MASK;
++ unsigned long end = (buffer_ulong + bytes) | ~PAGE_MASK;
++ unsigned long nr_addrs = (end - start + 1) >> PAGE_SHIFT;
++ unsigned long size = sizeof(*desc) +
++ sizeof(desc->address[0]) * nr_addrs;
++
++ /*
++ * slab allocator returns at least sizeof(void*) aligned pointer.
++ * When sizeof(*desc) > sizeof(void*), struct xencomm_desc might
++ * cross page boundary.
++ */
++ if (sizeof(*desc) > sizeof(void*)) {
++ unsigned long order = get_order(size);
++ desc = (struct xencomm_desc *)__get_free_pages(gfp_mask,
++ order);
++ if (desc == NULL)
++ return NULL;
++
++ desc->nr_addrs =
++ ((PAGE_SIZE << order) - sizeof(struct xencomm_desc)) /
++ sizeof(*desc->address);
++ } else {
++ desc = kmalloc(size, gfp_mask);
++ if (desc == NULL)
++ return NULL;
++
++ desc->nr_addrs = nr_addrs;
++ }
++ return desc;
++}
++
++void xencomm_free(struct xencomm_handle *desc)
++{
++ if (desc && !((ulong)desc & XENCOMM_INLINE_FLAG)) {
++ struct xencomm_desc *desc__ = (struct xencomm_desc*)desc;
++ if (sizeof(*desc__) > sizeof(void*)) {
++ unsigned long size = sizeof(*desc__) +
++ sizeof(desc__->address[0]) * desc__->nr_addrs;
++ unsigned long order = get_order(size);
++ free_pages((unsigned long)__va(desc), order);
++ } else
++ kfree(__va(desc));
++ }
++}
++
++static int xencomm_create(void *buffer, unsigned long bytes, struct xencomm_desc **ret, gfp_t gfp_mask)
++{
++ struct xencomm_desc *desc;
++ int rc;
++
++ pr_debug("%s: %p[%ld]\n", __func__, buffer, bytes);
++
++ if (bytes == 0) {
++ /* don't create a descriptor; Xen recognizes NULL. */
++ BUG_ON(buffer != NULL);
++ *ret = NULL;
++ return 0;
++ }
++
++ BUG_ON(buffer == NULL); /* 'bytes' is non-zero */
++
++ desc = xencomm_alloc(gfp_mask, buffer, bytes);
++ if (!desc) {
++ printk("%s failure\n", "xencomm_alloc");
++ return -ENOMEM;
++ }
++
++ rc = xencomm_init(desc, buffer, bytes);
++ if (rc) {
++ printk("%s failure: %d\n", "xencomm_init", rc);
++ xencomm_free((struct xencomm_handle *)__pa(desc));
++ return rc;
++ }
++
++ *ret = desc;
++ return 0;
++}
++
++/* check if memory address is within VMALLOC region */
++static int is_phys_contiguous(unsigned long addr)
++{
++ if (!is_kernel_addr(addr))
++ return 0;
++
++ return (addr < VMALLOC_START) || (addr >= VMALLOC_END);
++}
++
++static struct xencomm_handle *xencomm_create_inline(void *ptr)
++{
++ unsigned long paddr;
++
++ BUG_ON(!is_phys_contiguous((unsigned long)ptr));
++
++ paddr = (unsigned long)xencomm_pa(ptr);
++ BUG_ON(paddr & XENCOMM_INLINE_FLAG);
++ return (struct xencomm_handle *)(paddr | XENCOMM_INLINE_FLAG);
++}
++
++/* "mini" routine, for stack-based communications: */
++static int xencomm_create_mini(void *buffer,
++ unsigned long bytes, struct xencomm_mini *xc_desc,
++ struct xencomm_desc **ret)
++{
++ int rc = 0;
++ struct xencomm_desc *desc;
++ BUG_ON(((unsigned long)xc_desc) % sizeof(*xc_desc) != 0);
++
++ desc = (void *)xc_desc;
++
++ desc->nr_addrs = XENCOMM_MINI_ADDRS;
++
++ if (!(rc = xencomm_init(desc, buffer, bytes)))
++ *ret = desc;
++
++ return rc;
++}
++
++struct xencomm_handle *xencomm_map(void *ptr, unsigned long bytes)
++{
++ int rc;
++ struct xencomm_desc *desc;
++
++ if (is_phys_contiguous((unsigned long)ptr))
++ return xencomm_create_inline(ptr);
++
++ rc = xencomm_create(ptr, bytes, &desc, GFP_KERNEL);
++
++ if (rc || desc == NULL)
++ return NULL;
++
++ return xencomm_pa(desc);
++}
++
++struct xencomm_handle *__xencomm_map_no_alloc(void *ptr, unsigned long bytes,
++ struct xencomm_mini *xc_desc)
++{
++ int rc;
++ struct xencomm_desc *desc = NULL;
++
++ if (is_phys_contiguous((unsigned long)ptr))
++ return xencomm_create_inline(ptr);
++
++ rc = xencomm_create_mini(ptr, bytes, xc_desc,
++ &desc);
++
++ if (rc)
++ return NULL;
++
++ return xencomm_pa(desc);
++}
+Index: head-2008-11-25/drivers/xen/evtchn/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/evtchn/Makefile 2007-06-12 13:13:44.000000000 +0200
+@@ -0,0 +1,2 @@
++
++obj-y := evtchn.o
+Index: head-2008-11-25/drivers/xen/evtchn/evtchn.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/evtchn/evtchn.c 2008-08-07 12:44:36.000000000 +0200
+@@ -0,0 +1,560 @@
++/******************************************************************************
++ * evtchn.c
++ *
++ * Driver for receiving and demuxing event-channel signals.
++ *
++ * Copyright (c) 2004-2005, K A Fraser
++ * Multi-process extensions Copyright (c) 2004, Steven Smith
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/string.h>
++#include <linux/errno.h>
++#include <linux/fs.h>
++#include <linux/errno.h>
++#include <linux/miscdevice.h>
++#include <linux/major.h>
++#include <linux/proc_fs.h>
++#include <linux/stat.h>
++#include <linux/poll.h>
++#include <linux/irq.h>
++#include <linux/init.h>
++#include <linux/gfp.h>
++#include <linux/mutex.h>
++#include <linux/cpu.h>
++#include <xen/evtchn.h>
++#include <xen/public/evtchn.h>
++
++struct per_user_data {
++ /* Notification ring, accessed via /dev/xen/evtchn. */
++#define EVTCHN_RING_SIZE (PAGE_SIZE / sizeof(evtchn_port_t))
++#define EVTCHN_RING_MASK(_i) ((_i)&(EVTCHN_RING_SIZE-1))
++ evtchn_port_t *ring;
++ unsigned int ring_cons, ring_prod, ring_overflow;
++ struct mutex ring_cons_mutex; /* protect against concurrent readers */
++
++ /* Processes wait on this queue when ring is empty. */
++ wait_queue_head_t evtchn_wait;
++ struct fasync_struct *evtchn_async_queue;
++
++ int bind_cpu;
++ int nr_event_wrong_delivery;
++};
++
++/* Who's bound to each port? */
++static struct per_user_data *port_user[NR_EVENT_CHANNELS];
++static spinlock_t port_user_lock;
++
++void evtchn_device_upcall(int port)
++{
++ struct per_user_data *u;
++
++ spin_lock(&port_user_lock);
++
++ mask_evtchn(port);
++ clear_evtchn(port);
++
++ if ((u = port_user[port]) != NULL) {
++ if ((u->ring_prod - u->ring_cons) < EVTCHN_RING_SIZE) {
++ u->ring[EVTCHN_RING_MASK(u->ring_prod)] = port;
++ wmb(); /* Ensure ring contents visible */
++ if (u->ring_cons == u->ring_prod++) {
++ wake_up_interruptible(&u->evtchn_wait);
++ kill_fasync(&u->evtchn_async_queue,
++ SIGIO, POLL_IN);
++ }
++ } else {
++ u->ring_overflow = 1;
++ }
++ }
++
++ spin_unlock(&port_user_lock);
++}
++
++static void evtchn_check_wrong_delivery(struct per_user_data *u)
++{
++ evtchn_port_t port;
++ unsigned int current_cpu = smp_processor_id();
++
++ /* Delivered to correct CPU? All is good. */
++ if (u->bind_cpu == current_cpu) {
++ u->nr_event_wrong_delivery = 0;
++ return;
++ }
++
++ /* Tolerate up to 100 consecutive misdeliveries. */
++ if (++u->nr_event_wrong_delivery < 100)
++ return;
++
++ spin_lock_irq(&port_user_lock);
++
++ for (port = 0; port < NR_EVENT_CHANNELS; port++)
++ if (port_user[port] == u)
++ rebind_evtchn_to_cpu(port, current_cpu);
++
++ u->bind_cpu = current_cpu;
++ u->nr_event_wrong_delivery = 0;
++
++ spin_unlock_irq(&port_user_lock);
++}
++
++static ssize_t evtchn_read(struct file *file, char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ int rc;
++ unsigned int c, p, bytes1 = 0, bytes2 = 0;
++ struct per_user_data *u = file->private_data;
++
++ /* Whole number of ports. */
++ count &= ~(sizeof(evtchn_port_t)-1);
++
++ if (count == 0)
++ return 0;
++
++ if (count > PAGE_SIZE)
++ count = PAGE_SIZE;
++
++ for (;;) {
++ mutex_lock(&u->ring_cons_mutex);
++
++ rc = -EFBIG;
++ if (u->ring_overflow)
++ goto unlock_out;
++
++ if ((c = u->ring_cons) != (p = u->ring_prod))
++ break;
++
++ mutex_unlock(&u->ring_cons_mutex);
++
++ if (file->f_flags & O_NONBLOCK)
++ return -EAGAIN;
++
++ rc = wait_event_interruptible(
++ u->evtchn_wait, u->ring_cons != u->ring_prod);
++ if (rc)
++ return rc;
++ }
++
++ /* Byte lengths of two chunks. Chunk split (if any) is at ring wrap. */
++ if (((c ^ p) & EVTCHN_RING_SIZE) != 0) {
++ bytes1 = (EVTCHN_RING_SIZE - EVTCHN_RING_MASK(c)) *
++ sizeof(evtchn_port_t);
++ bytes2 = EVTCHN_RING_MASK(p) * sizeof(evtchn_port_t);
++ } else {
++ bytes1 = (p - c) * sizeof(evtchn_port_t);
++ bytes2 = 0;
++ }
++
++ /* Truncate chunks according to caller's maximum byte count. */
++ if (bytes1 > count) {
++ bytes1 = count;
++ bytes2 = 0;
++ } else if ((bytes1 + bytes2) > count) {
++ bytes2 = count - bytes1;
++ }
++
++ rc = -EFAULT;
++ rmb(); /* Ensure that we see the port before we copy it. */
++ if (copy_to_user(buf, &u->ring[EVTCHN_RING_MASK(c)], bytes1) ||
++ ((bytes2 != 0) &&
++ copy_to_user(&buf[bytes1], &u->ring[0], bytes2)))
++ goto unlock_out;
++
++ evtchn_check_wrong_delivery(u);
++
++ u->ring_cons += (bytes1 + bytes2) / sizeof(evtchn_port_t);
++ rc = bytes1 + bytes2;
++
++ unlock_out:
++ mutex_unlock(&u->ring_cons_mutex);
++ return rc;
++}
++
++static ssize_t evtchn_write(struct file *file, const char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ int rc, i;
++ evtchn_port_t *kbuf = (evtchn_port_t *)__get_free_page(GFP_KERNEL);
++ struct per_user_data *u = file->private_data;
++
++ if (kbuf == NULL)
++ return -ENOMEM;
++
++ /* Whole number of ports. */
++ count &= ~(sizeof(evtchn_port_t)-1);
++
++ rc = 0;
++ if (count == 0)
++ goto out;
++
++ if (count > PAGE_SIZE)
++ count = PAGE_SIZE;
++
++ rc = -EFAULT;
++ if (copy_from_user(kbuf, buf, count) != 0)
++ goto out;
++
++ spin_lock_irq(&port_user_lock);
++ for (i = 0; i < (count/sizeof(evtchn_port_t)); i++)
++ if ((kbuf[i] < NR_EVENT_CHANNELS) && (port_user[kbuf[i]] == u))
++ unmask_evtchn(kbuf[i]);
++ spin_unlock_irq(&port_user_lock);
++
++ rc = count;
++
++ out:
++ free_page((unsigned long)kbuf);
++ return rc;
++}
++
++static unsigned int next_bind_cpu(cpumask_t map)
++{
++ static unsigned int bind_cpu;
++ bind_cpu = next_cpu(bind_cpu, map);
++ if (bind_cpu >= NR_CPUS)
++ bind_cpu = first_cpu(map);
++ return bind_cpu;
++}
++
++static void evtchn_bind_to_user(struct per_user_data *u, int port)
++{
++ spin_lock_irq(&port_user_lock);
++
++ BUG_ON(port_user[port] != NULL);
++ port_user[port] = u;
++
++ if (u->bind_cpu == -1)
++ u->bind_cpu = next_bind_cpu(cpu_online_map);
++
++ rebind_evtchn_to_cpu(port, u->bind_cpu);
++
++ unmask_evtchn(port);
++
++ spin_unlock_irq(&port_user_lock);
++}
++
++static long evtchn_ioctl(struct file *file,
++ unsigned int cmd, unsigned long arg)
++{
++ int rc;
++ struct per_user_data *u = file->private_data;
++ void __user *uarg = (void __user *) arg;
++
++ switch (cmd) {
++ case IOCTL_EVTCHN_BIND_VIRQ: {
++ struct ioctl_evtchn_bind_virq bind;
++ struct evtchn_bind_virq bind_virq;
++
++ rc = -EFAULT;
++ if (copy_from_user(&bind, uarg, sizeof(bind)))
++ break;
++
++ bind_virq.virq = bind.virq;
++ bind_virq.vcpu = 0;
++ rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
++ &bind_virq);
++ if (rc != 0)
++ break;
++
++ rc = bind_virq.port;
++ evtchn_bind_to_user(u, rc);
++ break;
++ }
++
++ case IOCTL_EVTCHN_BIND_INTERDOMAIN: {
++ struct ioctl_evtchn_bind_interdomain bind;
++ struct evtchn_bind_interdomain bind_interdomain;
++
++ rc = -EFAULT;
++ if (copy_from_user(&bind, uarg, sizeof(bind)))
++ break;
++
++ bind_interdomain.remote_dom = bind.remote_domain;
++ bind_interdomain.remote_port = bind.remote_port;
++ rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain,
++ &bind_interdomain);
++ if (rc != 0)
++ break;
++
++ rc = bind_interdomain.local_port;
++ evtchn_bind_to_user(u, rc);
++ break;
++ }
++
++ case IOCTL_EVTCHN_BIND_UNBOUND_PORT: {
++ struct ioctl_evtchn_bind_unbound_port bind;
++ struct evtchn_alloc_unbound alloc_unbound;
++
++ rc = -EFAULT;
++ if (copy_from_user(&bind, uarg, sizeof(bind)))
++ break;
++
++ alloc_unbound.dom = DOMID_SELF;
++ alloc_unbound.remote_dom = bind.remote_domain;
++ rc = HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound,
++ &alloc_unbound);
++ if (rc != 0)
++ break;
++
++ rc = alloc_unbound.port;
++ evtchn_bind_to_user(u, rc);
++ break;
++ }
++
++ case IOCTL_EVTCHN_UNBIND: {
++ struct ioctl_evtchn_unbind unbind;
++ struct evtchn_close close;
++ int ret;
++
++ rc = -EFAULT;
++ if (copy_from_user(&unbind, uarg, sizeof(unbind)))
++ break;
++
++ rc = -EINVAL;
++ if (unbind.port >= NR_EVENT_CHANNELS)
++ break;
++
++ spin_lock_irq(&port_user_lock);
++
++ rc = -ENOTCONN;
++ if (port_user[unbind.port] != u) {
++ spin_unlock_irq(&port_user_lock);
++ break;
++ }
++
++ port_user[unbind.port] = NULL;
++ mask_evtchn(unbind.port);
++ rebind_evtchn_to_cpu(unbind.port, 0);
++
++ spin_unlock_irq(&port_user_lock);
++
++ close.port = unbind.port;
++ ret = HYPERVISOR_event_channel_op(EVTCHNOP_close, &close);
++ BUG_ON(ret);
++
++ rc = 0;
++ break;
++ }
++
++ case IOCTL_EVTCHN_NOTIFY: {
++ struct ioctl_evtchn_notify notify;
++
++ rc = -EFAULT;
++ if (copy_from_user(¬ify, uarg, sizeof(notify)))
++ break;
++
++ if (notify.port >= NR_EVENT_CHANNELS) {
++ rc = -EINVAL;
++ } else if (port_user[notify.port] != u) {
++ rc = -ENOTCONN;
++ } else {
++ notify_remote_via_evtchn(notify.port);
++ rc = 0;
++ }
++ break;
++ }
++
++ case IOCTL_EVTCHN_RESET: {
++ /* Initialise the ring to empty. Clear errors. */
++ mutex_lock(&u->ring_cons_mutex);
++ spin_lock_irq(&port_user_lock);
++ u->ring_cons = u->ring_prod = u->ring_overflow = 0;
++ spin_unlock_irq(&port_user_lock);
++ mutex_unlock(&u->ring_cons_mutex);
++ rc = 0;
++ break;
++ }
++
++ default:
++ rc = -ENOSYS;
++ break;
++ }
++
++ return rc;
++}
++
++static unsigned int evtchn_poll(struct file *file, poll_table *wait)
++{
++ unsigned int mask = POLLOUT | POLLWRNORM;
++ struct per_user_data *u = file->private_data;
++
++ poll_wait(file, &u->evtchn_wait, wait);
++ if (u->ring_cons != u->ring_prod)
++ mask |= POLLIN | POLLRDNORM;
++ if (u->ring_overflow)
++ mask = POLLERR;
++ return mask;
++}
++
++static int evtchn_fasync(int fd, struct file *filp, int on)
++{
++ struct per_user_data *u = filp->private_data;
++ return fasync_helper(fd, filp, on, &u->evtchn_async_queue);
++}
++
++static int evtchn_open(struct inode *inode, struct file *filp)
++{
++ struct per_user_data *u;
++
++ if ((u = kmalloc(sizeof(*u), GFP_KERNEL)) == NULL)
++ return -ENOMEM;
++
++ memset(u, 0, sizeof(*u));
++ init_waitqueue_head(&u->evtchn_wait);
++
++ u->ring = (evtchn_port_t *)__get_free_page(GFP_KERNEL);
++ if (u->ring == NULL) {
++ kfree(u);
++ return -ENOMEM;
++ }
++
++ mutex_init(&u->ring_cons_mutex);
++
++ filp->private_data = u;
++
++ u->bind_cpu = -1;
++
++ return 0;
++}
++
++static int evtchn_release(struct inode *inode, struct file *filp)
++{
++ int i;
++ struct per_user_data *u = filp->private_data;
++ struct evtchn_close close;
++
++ spin_lock_irq(&port_user_lock);
++
++ free_page((unsigned long)u->ring);
++
++ for (i = 0; i < NR_EVENT_CHANNELS; i++) {
++ int ret;
++ if (port_user[i] != u)
++ continue;
++
++ port_user[i] = NULL;
++ mask_evtchn(i);
++ rebind_evtchn_to_cpu(i, 0);
++
++ close.port = i;
++ ret = HYPERVISOR_event_channel_op(EVTCHNOP_close, &close);
++ BUG_ON(ret);
++ }
++
++ spin_unlock_irq(&port_user_lock);
++
++ kfree(u);
++
++ return 0;
++}
++
++static const struct file_operations evtchn_fops = {
++ .owner = THIS_MODULE,
++ .read = evtchn_read,
++ .write = evtchn_write,
++ .unlocked_ioctl = evtchn_ioctl,
++ .poll = evtchn_poll,
++ .fasync = evtchn_fasync,
++ .open = evtchn_open,
++ .release = evtchn_release,
++};
++
++static struct miscdevice evtchn_miscdev = {
++ .minor = MISC_DYNAMIC_MINOR,
++ .name = "evtchn",
++ .fops = &evtchn_fops,
++};
++
++static int __cpuinit evtchn_cpu_notify(struct notifier_block *nfb,
++ unsigned long action, void *hcpu)
++{
++ int hotcpu = (unsigned long)hcpu;
++ cpumask_t map = cpu_online_map;
++ int port, newcpu;
++ struct per_user_data *u;
++
++ switch (action) {
++ case CPU_DOWN_PREPARE:
++ cpu_clear(hotcpu, map);
++ spin_lock_irq(&port_user_lock);
++ for (port = 0; port < NR_EVENT_CHANNELS; port++) {
++ if ((u = port_user[port]) != NULL &&
++ u->bind_cpu == hotcpu &&
++ (newcpu = next_bind_cpu(map)) < NR_CPUS) {
++ rebind_evtchn_to_cpu(port, newcpu);
++ u->bind_cpu = newcpu;
++ }
++ }
++ spin_unlock_irq(&port_user_lock);
++ break;
++ default:
++ return NOTIFY_DONE;
++ }
++ return NOTIFY_OK;
++}
++
++static struct notifier_block __cpuinitdata evtchn_cpu_nfb = {
++ .notifier_call = evtchn_cpu_notify
++};
++
++static int __init evtchn_init(void)
++{
++ int err;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ spin_lock_init(&port_user_lock);
++ memset(port_user, 0, sizeof(port_user));
++
++ /* Create '/dev/misc/evtchn'. */
++ err = misc_register(&evtchn_miscdev);
++ if (err != 0) {
++ printk(KERN_ALERT "Could not register /dev/misc/evtchn\n");
++ return err;
++ }
++
++ register_cpu_notifier(&evtchn_cpu_nfb);
++
++ printk("Event-channel device installed.\n");
++
++ return 0;
++}
++
++static void __exit evtchn_cleanup(void)
++{
++ misc_deregister(&evtchn_miscdev);
++ unregister_cpu_notifier(&evtchn_cpu_nfb);
++}
++
++module_init(evtchn_init);
++module_exit(evtchn_cleanup);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/fbfront/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/fbfront/Makefile 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,2 @@
++obj-$(CONFIG_XEN_FRAMEBUFFER) := xenfb.o
++obj-$(CONFIG_XEN_KEYBOARD) += xenkbd.o
+Index: head-2008-11-25/drivers/xen/fbfront/xenfb.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/fbfront/xenfb.c 2008-11-25 12:22:34.000000000 +0100
+@@ -0,0 +1,887 @@
++/*
++ * linux/drivers/video/xenfb.c -- Xen para-virtual frame buffer device
++ *
++ * Copyright (C) 2005-2006 Anthony Liguori <aliguori@us.ibm.com>
++ * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
++ *
++ * Based on linux/drivers/video/q40fb.c
++ *
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file COPYING in the main directory of this archive for
++ * more details.
++ */
++
++/*
++ * TODO:
++ *
++ * Switch to grant tables when they become capable of dealing with the
++ * frame buffer.
++ */
++
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/fb.h>
++#include <linux/module.h>
++#include <linux/vmalloc.h>
++#include <linux/mm.h>
++#include <linux/mutex.h>
++#include <asm/hypervisor.h>
++#include <xen/evtchn.h>
++#include <xen/interface/io/fbif.h>
++#include <xen/interface/io/protocols.h>
++#include <xen/xenbus.h>
++#include <linux/kthread.h>
++
++struct xenfb_mapping
++{
++ struct list_head link;
++ struct vm_area_struct *vma;
++ atomic_t map_refs;
++ int faults;
++ struct xenfb_info *info;
++};
++
++struct xenfb_info
++{
++ struct task_struct *kthread;
++ wait_queue_head_t wq;
++
++ unsigned char *fb;
++ struct fb_info *fb_info;
++ struct timer_list refresh;
++ int dirty;
++ int x1, y1, x2, y2; /* dirty rectangle,
++ protected by dirty_lock */
++ spinlock_t dirty_lock;
++ struct mutex mm_lock;
++ int nr_pages;
++ struct page **pages;
++ struct list_head mappings; /* protected by mm_lock */
++
++ int irq;
++ struct xenfb_page *page;
++ unsigned long *mfns;
++ int update_wanted; /* XENFB_TYPE_UPDATE wanted */
++ int feature_resize; /* Backend has resize feature */
++ struct xenfb_resize resize;
++ int resize_dpy;
++ spinlock_t resize_lock;
++
++ struct xenbus_device *xbdev;
++};
++
++/*
++ * There are three locks:
++ * spinlock resize_lock protecting resize_dpy and resize
++ * spinlock dirty_lock protecting the dirty rectangle
++ * mutex mm_lock protecting mappings.
++ *
++ * How the dirty and mapping locks work together
++ *
++ * The problem is that dirty rectangle and mappings aren't
++ * independent: the dirty rectangle must cover all faulted pages in
++ * mappings. We need to prove that our locking maintains this
++ * invariant.
++ *
++ * There are several kinds of critical regions:
++ *
++ * 1. Holding only dirty_lock: xenfb_refresh(). May run in
++ * interrupts. Extends the dirty rectangle. Trivially preserves
++ * invariant.
++ *
++ * 2. Holding only mm_lock: xenfb_mmap() and xenfb_vm_close(). Touch
++ * only mappings. The former creates unfaulted pages. Preserves
++ * invariant. The latter removes pages. Preserves invariant.
++ *
++ * 3. Holding both locks: xenfb_vm_nopage(). Extends the dirty
++ * rectangle and updates mappings consistently. Preserves
++ * invariant.
++ *
++ * 4. The ugliest one: xenfb_update_screen(). Clear the dirty
++ * rectangle and update mappings consistently.
++ *
++ * We can't simply hold both locks, because zap_page_range() cannot
++ * be called with a spinlock held.
++ *
++ * Therefore, we first clear the dirty rectangle with both locks
++ * held. Then we unlock dirty_lock and update the mappings.
++ * Critical regions that hold only dirty_lock may interfere with
++ * that. This can only be region 1: xenfb_refresh(). But that
++ * just extends the dirty rectangle, which can't harm the
++ * invariant.
++ *
++ * But FIXME: the invariant is too weak. It misses that the fault
++ * record in mappings must be consistent with the mapping of pages in
++ * the associated address space! do_no_page() updates the PTE after
++ * xenfb_vm_nopage() returns, i.e. outside the critical region. This
++ * allows the following race:
++ *
++ * X writes to some address in the Xen frame buffer
++ * Fault - call do_no_page()
++ * call xenfb_vm_nopage()
++ * grab mm_lock
++ * map->faults++;
++ * release mm_lock
++ * return back to do_no_page()
++ * (preempted, or SMP)
++ * Xen worker thread runs.
++ * grab mm_lock
++ * look at mappings
++ * find this mapping, zaps its pages (but page not in pte yet)
++ * clear map->faults
++ * releases mm_lock
++ * (back to X process)
++ * put page in X's pte
++ *
++ * Oh well, we wont be updating the writes to this page anytime soon.
++ */
++#define MB_ (1024*1024)
++#define XENFB_DEFAULT_FB_LEN (XENFB_WIDTH * XENFB_HEIGHT * XENFB_DEPTH / 8)
++
++enum {KPARAM_MEM, KPARAM_WIDTH, KPARAM_HEIGHT, KPARAM_CNT};
++static int video[KPARAM_CNT] = {2, XENFB_WIDTH, XENFB_HEIGHT};
++module_param_array(video, int, NULL, 0);
++MODULE_PARM_DESC(video,
++ "Size of video memory in MB and width,height in pixels, default = (2,800,600)");
++
++static int xenfb_fps = 20;
++
++static int xenfb_remove(struct xenbus_device *);
++static void xenfb_init_shared_page(struct xenfb_info *, struct fb_info *);
++static int xenfb_connect_backend(struct xenbus_device *, struct xenfb_info *);
++static void xenfb_disconnect_backend(struct xenfb_info *);
++
++static void xenfb_send_event(struct xenfb_info *info,
++ union xenfb_out_event *event)
++{
++ __u32 prod;
++
++ prod = info->page->out_prod;
++ /* caller ensures !xenfb_queue_full() */
++ mb(); /* ensure ring space available */
++ XENFB_OUT_RING_REF(info->page, prod) = *event;
++ wmb(); /* ensure ring contents visible */
++ info->page->out_prod = prod + 1;
++
++ notify_remote_via_irq(info->irq);
++}
++
++static void xenfb_do_update(struct xenfb_info *info,
++ int x, int y, int w, int h)
++{
++ union xenfb_out_event event;
++
++ memset(&event, 0, sizeof(event));
++ event.type = XENFB_TYPE_UPDATE;
++ event.update.x = x;
++ event.update.y = y;
++ event.update.width = w;
++ event.update.height = h;
++
++ /* caller ensures !xenfb_queue_full() */
++ xenfb_send_event(info, &event);
++}
++
++static void xenfb_do_resize(struct xenfb_info *info)
++{
++ union xenfb_out_event event;
++
++ memset(&event, 0, sizeof(event));
++ event.resize = info->resize;
++
++ /* caller ensures !xenfb_queue_full() */
++ xenfb_send_event(info, &event);
++}
++
++static int xenfb_queue_full(struct xenfb_info *info)
++{
++ __u32 cons, prod;
++
++ prod = info->page->out_prod;
++ cons = info->page->out_cons;
++ return prod - cons == XENFB_OUT_RING_LEN;
++}
++
++static void xenfb_update_screen(struct xenfb_info *info)
++{
++ unsigned long flags;
++ int y1, y2, x1, x2;
++ struct xenfb_mapping *map;
++
++ if (!info->update_wanted)
++ return;
++ if (xenfb_queue_full(info))
++ return;
++
++ mutex_lock(&info->mm_lock);
++
++ spin_lock_irqsave(&info->dirty_lock, flags);
++ y1 = info->y1;
++ y2 = info->y2;
++ x1 = info->x1;
++ x2 = info->x2;
++ info->x1 = info->y1 = INT_MAX;
++ info->x2 = info->y2 = 0;
++ spin_unlock_irqrestore(&info->dirty_lock, flags);
++
++ list_for_each_entry(map, &info->mappings, link) {
++ if (!map->faults)
++ continue;
++ zap_page_range(map->vma, map->vma->vm_start,
++ map->vma->vm_end - map->vma->vm_start, NULL);
++ map->faults = 0;
++ }
++
++ mutex_unlock(&info->mm_lock);
++
++ if (x2 < x1 || y2 < y1) {
++ printk("xenfb_update_screen bogus rect %d %d %d %d\n",
++ x1, x2, y1, y2);
++ WARN_ON(1);
++ }
++ xenfb_do_update(info, x1, y1, x2 - x1, y2 - y1);
++}
++
++static void xenfb_handle_resize_dpy(struct xenfb_info *info)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->resize_lock, flags);
++ if (info->resize_dpy) {
++ if (!xenfb_queue_full(info)) {
++ info->resize_dpy = 0;
++ xenfb_do_resize(info);
++ }
++ }
++ spin_unlock_irqrestore(&info->resize_lock, flags);
++}
++
++static int xenfb_thread(void *data)
++{
++ struct xenfb_info *info = data;
++
++ while (!kthread_should_stop()) {
++ xenfb_handle_resize_dpy(info);
++ if (info->dirty) {
++ info->dirty = 0;
++ xenfb_update_screen(info);
++ }
++ wait_event_interruptible(info->wq,
++ kthread_should_stop() || info->dirty);
++ try_to_freeze();
++ }
++ return 0;
++}
++
++static int xenfb_setcolreg(unsigned regno, unsigned red, unsigned green,
++ unsigned blue, unsigned transp,
++ struct fb_info *info)
++{
++ u32 v;
++
++ if (regno > info->cmap.len)
++ return 1;
++
++ red >>= (16 - info->var.red.length);
++ green >>= (16 - info->var.green.length);
++ blue >>= (16 - info->var.blue.length);
++
++ v = (red << info->var.red.offset) |
++ (green << info->var.green.offset) |
++ (blue << info->var.blue.offset);
++
++ /* FIXME is this sane? check against xxxfb_setcolreg()! */
++ switch (info->var.bits_per_pixel) {
++ case 16:
++ case 24:
++ case 32:
++ ((u32 *)info->pseudo_palette)[regno] = v;
++ break;
++ }
++
++ return 0;
++}
++
++static void xenfb_timer(unsigned long data)
++{
++ struct xenfb_info *info = (struct xenfb_info *)data;
++ wake_up(&info->wq);
++}
++
++static void __xenfb_refresh(struct xenfb_info *info,
++ int x1, int y1, int w, int h)
++{
++ int y2, x2;
++
++ y2 = y1 + h;
++ x2 = x1 + w;
++
++ if (info->y1 > y1)
++ info->y1 = y1;
++ if (info->y2 < y2)
++ info->y2 = y2;
++ if (info->x1 > x1)
++ info->x1 = x1;
++ if (info->x2 < x2)
++ info->x2 = x2;
++ info->dirty = 1;
++
++ if (timer_pending(&info->refresh))
++ return;
++
++ mod_timer(&info->refresh, jiffies + HZ/xenfb_fps);
++}
++
++static void xenfb_refresh(struct xenfb_info *info,
++ int x1, int y1, int w, int h)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->dirty_lock, flags);
++ __xenfb_refresh(info, x1, y1, w, h);
++ spin_unlock_irqrestore(&info->dirty_lock, flags);
++}
++
++static void xenfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
++{
++ struct xenfb_info *info = p->par;
++
++ cfb_fillrect(p, rect);
++ xenfb_refresh(info, rect->dx, rect->dy, rect->width, rect->height);
++}
++
++static void xenfb_imageblit(struct fb_info *p, const struct fb_image *image)
++{
++ struct xenfb_info *info = p->par;
++
++ cfb_imageblit(p, image);
++ xenfb_refresh(info, image->dx, image->dy, image->width, image->height);
++}
++
++static void xenfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
++{
++ struct xenfb_info *info = p->par;
++
++ cfb_copyarea(p, area);
++ xenfb_refresh(info, area->dx, area->dy, area->width, area->height);
++}
++
++static void xenfb_vm_open(struct vm_area_struct *vma)
++{
++ struct xenfb_mapping *map = vma->vm_private_data;
++ atomic_inc(&map->map_refs);
++}
++
++static void xenfb_vm_close(struct vm_area_struct *vma)
++{
++ struct xenfb_mapping *map = vma->vm_private_data;
++ struct xenfb_info *info = map->info;
++
++ mutex_lock(&info->mm_lock);
++ if (atomic_dec_and_test(&map->map_refs)) {
++ list_del(&map->link);
++ kfree(map);
++ }
++ mutex_unlock(&info->mm_lock);
++}
++
++static struct page *xenfb_vm_nopage(struct vm_area_struct *vma,
++ unsigned long vaddr, int *type)
++{
++ struct xenfb_mapping *map = vma->vm_private_data;
++ struct xenfb_info *info = map->info;
++ int pgnr = (vaddr - vma->vm_start) >> PAGE_SHIFT;
++ unsigned long flags;
++ struct page *page;
++ int y1, y2;
++
++ if (pgnr >= info->nr_pages)
++ return NOPAGE_SIGBUS;
++
++ mutex_lock(&info->mm_lock);
++ spin_lock_irqsave(&info->dirty_lock, flags);
++ page = info->pages[pgnr];
++ get_page(page);
++ map->faults++;
++
++ y1 = pgnr * PAGE_SIZE / info->fb_info->fix.line_length;
++ y2 = (pgnr * PAGE_SIZE + PAGE_SIZE - 1) / info->fb_info->fix.line_length;
++ if (y2 > info->fb_info->var.yres)
++ y2 = info->fb_info->var.yres;
++ __xenfb_refresh(info, 0, y1, info->fb_info->var.xres, y2 - y1);
++ spin_unlock_irqrestore(&info->dirty_lock, flags);
++ mutex_unlock(&info->mm_lock);
++
++ if (type)
++ *type = VM_FAULT_MINOR;
++
++ return page;
++}
++
++static struct vm_operations_struct xenfb_vm_ops = {
++ .open = xenfb_vm_open,
++ .close = xenfb_vm_close,
++ .nopage = xenfb_vm_nopage,
++};
++
++static int xenfb_mmap(struct fb_info *fb_info, struct vm_area_struct *vma)
++{
++ struct xenfb_info *info = fb_info->par;
++ struct xenfb_mapping *map;
++ int map_pages;
++
++ if (!(vma->vm_flags & VM_WRITE))
++ return -EINVAL;
++ if (!(vma->vm_flags & VM_SHARED))
++ return -EINVAL;
++ if (vma->vm_pgoff != 0)
++ return -EINVAL;
++
++ map_pages = (vma->vm_end - vma->vm_start + PAGE_SIZE-1) >> PAGE_SHIFT;
++ if (map_pages > info->nr_pages)
++ return -EINVAL;
++
++ map = kzalloc(sizeof(*map), GFP_KERNEL);
++ if (map == NULL)
++ return -ENOMEM;
++
++ map->vma = vma;
++ map->faults = 0;
++ map->info = info;
++ atomic_set(&map->map_refs, 1);
++
++ mutex_lock(&info->mm_lock);
++ list_add(&map->link, &info->mappings);
++ mutex_unlock(&info->mm_lock);
++
++ vma->vm_ops = &xenfb_vm_ops;
++ vma->vm_flags |= (VM_DONTEXPAND | VM_RESERVED);
++ vma->vm_private_data = map;
++
++ return 0;
++}
++
++static int
++xenfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
++{
++ struct xenfb_info *xenfb_info;
++ int required_mem_len;
++
++ xenfb_info = info->par;
++
++ if (!xenfb_info->feature_resize) {
++ if (var->xres == video[KPARAM_WIDTH] &&
++ var->yres == video[KPARAM_HEIGHT] &&
++ var->bits_per_pixel == xenfb_info->page->depth) {
++ return 0;
++ }
++ return -EINVAL;
++ }
++
++ /* Can't resize past initial width and height */
++ if (var->xres > video[KPARAM_WIDTH] || var->yres > video[KPARAM_HEIGHT])
++ return -EINVAL;
++
++ required_mem_len = var->xres * var->yres * (xenfb_info->page->depth / 8);
++ if (var->bits_per_pixel == xenfb_info->page->depth &&
++ var->xres <= info->fix.line_length / (XENFB_DEPTH / 8) &&
++ required_mem_len <= info->fix.smem_len) {
++ var->xres_virtual = var->xres;
++ var->yres_virtual = var->yres;
++ return 0;
++ }
++ return -EINVAL;
++}
++
++static int xenfb_set_par(struct fb_info *info)
++{
++ struct xenfb_info *xenfb_info;
++ unsigned long flags;
++
++ xenfb_info = info->par;
++
++ spin_lock_irqsave(&xenfb_info->resize_lock, flags);
++ xenfb_info->resize.type = XENFB_TYPE_RESIZE;
++ xenfb_info->resize.width = info->var.xres;
++ xenfb_info->resize.height = info->var.yres;
++ xenfb_info->resize.stride = info->fix.line_length;
++ xenfb_info->resize.depth = info->var.bits_per_pixel;
++ xenfb_info->resize.offset = 0;
++ xenfb_info->resize_dpy = 1;
++ spin_unlock_irqrestore(&xenfb_info->resize_lock, flags);
++ return 0;
++}
++
++static struct fb_ops xenfb_fb_ops = {
++ .owner = THIS_MODULE,
++ .fb_setcolreg = xenfb_setcolreg,
++ .fb_fillrect = xenfb_fillrect,
++ .fb_copyarea = xenfb_copyarea,
++ .fb_imageblit = xenfb_imageblit,
++ .fb_mmap = xenfb_mmap,
++ .fb_check_var = xenfb_check_var,
++ .fb_set_par = xenfb_set_par,
++};
++
++static irqreturn_t xenfb_event_handler(int rq, void *dev_id,
++ struct pt_regs *regs)
++{
++ /*
++ * No in events recognized, simply ignore them all.
++ * If you need to recognize some, see xenbkd's input_handler()
++ * for how to do that.
++ */
++ struct xenfb_info *info = dev_id;
++ struct xenfb_page *page = info->page;
++
++ if (page->in_cons != page->in_prod) {
++ info->page->in_cons = info->page->in_prod;
++ notify_remote_via_irq(info->irq);
++ }
++ return IRQ_HANDLED;
++}
++
++static unsigned long vmalloc_to_mfn(void *address)
++{
++ return pfn_to_mfn(vmalloc_to_pfn(address));
++}
++
++static int __devinit xenfb_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ struct xenfb_info *info;
++ struct fb_info *fb_info;
++ int fb_size;
++ int val;
++ int ret;
++
++ info = kzalloc(sizeof(*info), GFP_KERNEL);
++ if (info == NULL) {
++ xenbus_dev_fatal(dev, -ENOMEM, "allocating info structure");
++ return -ENOMEM;
++ }
++
++ /* Limit kernel param videoram amount to what is in xenstore */
++ if (xenbus_scanf(XBT_NIL, dev->otherend, "videoram", "%d", &val) == 1) {
++ if (val < video[KPARAM_MEM])
++ video[KPARAM_MEM] = val;
++ }
++
++ /* If requested res does not fit in available memory, use default */
++ fb_size = video[KPARAM_MEM] * MB_;
++ if (video[KPARAM_WIDTH] * video[KPARAM_HEIGHT] * XENFB_DEPTH/8 > fb_size) {
++ video[KPARAM_WIDTH] = XENFB_WIDTH;
++ video[KPARAM_HEIGHT] = XENFB_HEIGHT;
++ fb_size = XENFB_DEFAULT_FB_LEN;
++ }
++
++ dev->dev.driver_data = info;
++ info->xbdev = dev;
++ info->irq = -1;
++ info->x1 = info->y1 = INT_MAX;
++ spin_lock_init(&info->dirty_lock);
++ spin_lock_init(&info->resize_lock);
++ mutex_init(&info->mm_lock);
++ init_waitqueue_head(&info->wq);
++ init_timer(&info->refresh);
++ info->refresh.function = xenfb_timer;
++ info->refresh.data = (unsigned long)info;
++ INIT_LIST_HEAD(&info->mappings);
++
++ info->fb = vmalloc(fb_size);
++ if (info->fb == NULL)
++ goto error_nomem;
++ memset(info->fb, 0, fb_size);
++
++ info->nr_pages = (fb_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
++
++ info->pages = kmalloc(sizeof(struct page *) * info->nr_pages,
++ GFP_KERNEL);
++ if (info->pages == NULL)
++ goto error_nomem;
++
++ info->mfns = vmalloc(sizeof(unsigned long) * info->nr_pages);
++ if (!info->mfns)
++ goto error_nomem;
++
++ /* set up shared page */
++ info->page = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
++ if (!info->page)
++ goto error_nomem;
++
++ fb_info = framebuffer_alloc(sizeof(u32) * 256, NULL);
++ /* see fishy hackery below */
++ if (fb_info == NULL)
++ goto error_nomem;
++
++ /* FIXME fishy hackery */
++ fb_info->pseudo_palette = fb_info->par;
++ fb_info->par = info;
++ /* /FIXME */
++ fb_info->screen_base = info->fb;
++
++ fb_info->fbops = &xenfb_fb_ops;
++ fb_info->var.xres_virtual = fb_info->var.xres = video[KPARAM_WIDTH];
++ fb_info->var.yres_virtual = fb_info->var.yres = video[KPARAM_HEIGHT];
++ fb_info->var.bits_per_pixel = XENFB_DEPTH;
++
++ fb_info->var.red = (struct fb_bitfield){16, 8, 0};
++ fb_info->var.green = (struct fb_bitfield){8, 8, 0};
++ fb_info->var.blue = (struct fb_bitfield){0, 8, 0};
++
++ fb_info->var.activate = FB_ACTIVATE_NOW;
++ fb_info->var.height = -1;
++ fb_info->var.width = -1;
++ fb_info->var.vmode = FB_VMODE_NONINTERLACED;
++
++ fb_info->fix.visual = FB_VISUAL_TRUECOLOR;
++ fb_info->fix.line_length = fb_info->var.xres * (XENFB_DEPTH / 8);
++ fb_info->fix.smem_start = 0;
++ fb_info->fix.smem_len = fb_size;
++ strcpy(fb_info->fix.id, "xen");
++ fb_info->fix.type = FB_TYPE_PACKED_PIXELS;
++ fb_info->fix.accel = FB_ACCEL_NONE;
++
++ fb_info->flags = FBINFO_FLAG_DEFAULT;
++
++ ret = fb_alloc_cmap(&fb_info->cmap, 256, 0);
++ if (ret < 0) {
++ framebuffer_release(fb_info);
++ xenbus_dev_fatal(dev, ret, "fb_alloc_cmap");
++ goto error;
++ }
++
++ xenfb_init_shared_page(info, fb_info);
++
++ ret = register_framebuffer(fb_info);
++ if (ret) {
++ fb_dealloc_cmap(&info->fb_info->cmap);
++ framebuffer_release(fb_info);
++ xenbus_dev_fatal(dev, ret, "register_framebuffer");
++ goto error;
++ }
++ info->fb_info = fb_info;
++
++ ret = xenfb_connect_backend(dev, info);
++ if (ret < 0)
++ goto error;
++
++ /* FIXME should this be delayed until backend XenbusStateConnected? */
++ info->kthread = kthread_run(xenfb_thread, info, "xenfb thread");
++ if (IS_ERR(info->kthread)) {
++ ret = PTR_ERR(info->kthread);
++ info->kthread = NULL;
++ xenbus_dev_fatal(dev, ret, "register_framebuffer");
++ goto error;
++ }
++
++ return 0;
++
++ error_nomem:
++ ret = -ENOMEM;
++ xenbus_dev_fatal(dev, ret, "allocating device memory");
++ error:
++ xenfb_remove(dev);
++ return ret;
++}
++
++static int xenfb_resume(struct xenbus_device *dev)
++{
++ struct xenfb_info *info = dev->dev.driver_data;
++
++ xenfb_disconnect_backend(info);
++ xenfb_init_shared_page(info, info->fb_info);
++ return xenfb_connect_backend(dev, info);
++}
++
++static int xenfb_remove(struct xenbus_device *dev)
++{
++ struct xenfb_info *info = dev->dev.driver_data;
++
++ del_timer(&info->refresh);
++ if (info->kthread)
++ kthread_stop(info->kthread);
++ xenfb_disconnect_backend(info);
++ if (info->fb_info) {
++ unregister_framebuffer(info->fb_info);
++ fb_dealloc_cmap(&info->fb_info->cmap);
++ framebuffer_release(info->fb_info);
++ }
++ free_page((unsigned long)info->page);
++ vfree(info->mfns);
++ kfree(info->pages);
++ vfree(info->fb);
++ kfree(info);
++
++ return 0;
++}
++
++static void xenfb_init_shared_page(struct xenfb_info *info,
++ struct fb_info * fb_info)
++{
++ int i;
++ int epd = PAGE_SIZE / sizeof(info->mfns[0]);
++
++ for (i = 0; i < info->nr_pages; i++)
++ info->pages[i] = vmalloc_to_page(info->fb + i * PAGE_SIZE);
++
++ for (i = 0; i < info->nr_pages; i++)
++ info->mfns[i] = vmalloc_to_mfn(info->fb + i * PAGE_SIZE);
++
++ for (i = 0; i * epd < info->nr_pages; i++)
++ info->page->pd[i] = vmalloc_to_mfn(&info->mfns[i * epd]);
++
++ info->page->width = fb_info->var.xres;
++ info->page->height = fb_info->var.yres;
++ info->page->depth = fb_info->var.bits_per_pixel;
++ info->page->line_length = fb_info->fix.line_length;
++ info->page->mem_length = fb_info->fix.smem_len;
++ info->page->in_cons = info->page->in_prod = 0;
++ info->page->out_cons = info->page->out_prod = 0;
++}
++
++static int xenfb_connect_backend(struct xenbus_device *dev,
++ struct xenfb_info *info)
++{
++ int ret;
++ struct xenbus_transaction xbt;
++
++ ret = bind_listening_port_to_irqhandler(
++ dev->otherend_id, xenfb_event_handler, 0, "xenfb", info);
++ if (ret < 0) {
++ xenbus_dev_fatal(dev, ret,
++ "bind_listening_port_to_irqhandler");
++ return ret;
++ }
++ info->irq = ret;
++
++ again:
++ ret = xenbus_transaction_start(&xbt);
++ if (ret) {
++ xenbus_dev_fatal(dev, ret, "starting transaction");
++ return ret;
++ }
++ ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu",
++ virt_to_mfn(info->page));
++ if (ret)
++ goto error_xenbus;
++ ret = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
++ irq_to_evtchn_port(info->irq));
++ if (ret)
++ goto error_xenbus;
++ ret = xenbus_printf(xbt, dev->nodename, "protocol", "%s",
++ XEN_IO_PROTO_ABI_NATIVE);
++ if (ret)
++ goto error_xenbus;
++ ret = xenbus_printf(xbt, dev->nodename, "feature-update", "1");
++ if (ret)
++ goto error_xenbus;
++ ret = xenbus_transaction_end(xbt, 0);
++ if (ret) {
++ if (ret == -EAGAIN)
++ goto again;
++ xenbus_dev_fatal(dev, ret, "completing transaction");
++ return ret;
++ }
++
++ xenbus_switch_state(dev, XenbusStateInitialised);
++ return 0;
++
++ error_xenbus:
++ xenbus_transaction_end(xbt, 1);
++ xenbus_dev_fatal(dev, ret, "writing xenstore");
++ return ret;
++}
++
++static void xenfb_disconnect_backend(struct xenfb_info *info)
++{
++ if (info->irq >= 0)
++ unbind_from_irqhandler(info->irq, info);
++ info->irq = -1;
++}
++
++static void xenfb_backend_changed(struct xenbus_device *dev,
++ enum xenbus_state backend_state)
++{
++ struct xenfb_info *info = dev->dev.driver_data;
++ int val;
++
++ switch (backend_state) {
++ case XenbusStateInitialising:
++ case XenbusStateInitialised:
++ case XenbusStateReconfiguring:
++ case XenbusStateReconfigured:
++ case XenbusStateUnknown:
++ case XenbusStateClosed:
++ break;
++
++ case XenbusStateInitWait:
++ InitWait:
++ xenbus_switch_state(dev, XenbusStateConnected);
++ break;
++
++ case XenbusStateConnected:
++ /*
++ * Work around xenbus race condition: If backend goes
++ * through InitWait to Connected fast enough, we can
++ * get Connected twice here.
++ */
++ if (dev->state != XenbusStateConnected)
++ goto InitWait; /* no InitWait seen yet, fudge it */
++
++ if (xenbus_scanf(XBT_NIL, info->xbdev->otherend,
++ "request-update", "%d", &val) < 0)
++ val = 0;
++ if (val)
++ info->update_wanted = 1;
++
++ if (xenbus_scanf(XBT_NIL, dev->otherend,
++ "feature-resize", "%d", &val) < 0)
++ val = 0;
++ info->feature_resize = val;
++ break;
++
++ case XenbusStateClosing:
++ // FIXME is this safe in any dev->state?
++ xenbus_frontend_closed(dev);
++ break;
++ }
++}
++
++static const struct xenbus_device_id xenfb_ids[] = {
++ { "vfb" },
++ { "" }
++};
++MODULE_ALIAS("xen:vfb");
++
++static struct xenbus_driver xenfb_driver = {
++ .name = "vfb",
++ .owner = THIS_MODULE,
++ .ids = xenfb_ids,
++ .probe = xenfb_probe,
++ .remove = xenfb_remove,
++ .resume = xenfb_resume,
++ .otherend_changed = xenfb_backend_changed,
++};
++
++static int __init xenfb_init(void)
++{
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ /* Nothing to do if running in dom0. */
++ if (is_initial_xendomain())
++ return -ENODEV;
++
++ return xenbus_register_frontend(&xenfb_driver);
++}
++
++static void __exit xenfb_cleanup(void)
++{
++ return xenbus_unregister_driver(&xenfb_driver);
++}
++
++module_init(xenfb_init);
++module_exit(xenfb_cleanup);
++
++MODULE_LICENSE("GPL");
+Index: head-2008-11-25/drivers/xen/fbfront/xenkbd.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/fbfront/xenkbd.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,354 @@
++/*
++ * linux/drivers/input/keyboard/xenkbd.c -- Xen para-virtual input device
++ *
++ * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
++ * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
++ *
++ * Based on linux/drivers/input/mouse/sermouse.c
++ *
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file COPYING in the main directory of this archive for
++ * more details.
++ */
++
++/*
++ * TODO:
++ *
++ * Switch to grant tables together with xenfb.c.
++ */
++
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/module.h>
++#include <linux/input.h>
++#include <asm/hypervisor.h>
++#include <xen/evtchn.h>
++#include <xen/interface/io/fbif.h>
++#include <xen/interface/io/kbdif.h>
++#include <xen/xenbus.h>
++
++struct xenkbd_info
++{
++ struct input_dev *kbd;
++ struct input_dev *ptr;
++ struct xenkbd_page *page;
++ int irq;
++ struct xenbus_device *xbdev;
++ char phys[32];
++};
++
++static int xenkbd_remove(struct xenbus_device *);
++static int xenkbd_connect_backend(struct xenbus_device *, struct xenkbd_info *);
++static void xenkbd_disconnect_backend(struct xenkbd_info *);
++
++/*
++ * Note: if you need to send out events, see xenfb_do_update() for how
++ * to do that.
++ */
++
++static irqreturn_t input_handler(int rq, void *dev_id, struct pt_regs *regs)
++{
++ struct xenkbd_info *info = dev_id;
++ struct xenkbd_page *page = info->page;
++ __u32 cons, prod;
++
++ prod = page->in_prod;
++ if (prod == page->in_cons)
++ return IRQ_HANDLED;
++ rmb(); /* ensure we see ring contents up to prod */
++ for (cons = page->in_cons; cons != prod; cons++) {
++ union xenkbd_in_event *event;
++ struct input_dev *dev;
++ event = &XENKBD_IN_RING_REF(page, cons);
++
++ dev = info->ptr;
++ switch (event->type) {
++ case XENKBD_TYPE_MOTION:
++ if (event->motion.rel_z)
++ input_report_rel(dev, REL_WHEEL,
++ -event->motion.rel_z);
++ input_report_rel(dev, REL_X, event->motion.rel_x);
++ input_report_rel(dev, REL_Y, event->motion.rel_y);
++ break;
++ case XENKBD_TYPE_KEY:
++ dev = NULL;
++ if (test_bit(event->key.keycode, info->kbd->keybit))
++ dev = info->kbd;
++ if (test_bit(event->key.keycode, info->ptr->keybit))
++ dev = info->ptr;
++ if (dev)
++ input_report_key(dev, event->key.keycode,
++ event->key.pressed);
++ else
++ printk("xenkbd: unhandled keycode 0x%x\n",
++ event->key.keycode);
++ break;
++ case XENKBD_TYPE_POS:
++ if (event->pos.rel_z)
++ input_report_rel(dev, REL_WHEEL,
++ -event->pos.rel_z);
++ input_report_abs(dev, ABS_X, event->pos.abs_x);
++ input_report_abs(dev, ABS_Y, event->pos.abs_y);
++ break;
++ }
++ if (dev)
++ input_sync(dev);
++ }
++ mb(); /* ensure we got ring contents */
++ page->in_cons = cons;
++ notify_remote_via_irq(info->irq);
++
++ return IRQ_HANDLED;
++}
++
++int __devinit xenkbd_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int ret, i;
++ struct xenkbd_info *info;
++ struct input_dev *kbd, *ptr;
++
++ info = kzalloc(sizeof(*info), GFP_KERNEL);
++ if (!info) {
++ xenbus_dev_fatal(dev, -ENOMEM, "allocating info structure");
++ return -ENOMEM;
++ }
++ dev->dev.driver_data = info;
++ info->xbdev = dev;
++ snprintf(info->phys, sizeof(info->phys), "xenbus/%s", dev->nodename);
++
++ info->page = (void *)__get_free_page(GFP_KERNEL);
++ if (!info->page)
++ goto error_nomem;
++ info->page->in_cons = info->page->in_prod = 0;
++ info->page->out_cons = info->page->out_prod = 0;
++
++ /* keyboard */
++ kbd = input_allocate_device();
++ if (!kbd)
++ goto error_nomem;
++ kbd->name = "Xen Virtual Keyboard";
++ kbd->phys = info->phys;
++ kbd->id.bustype = BUS_PCI;
++ kbd->id.vendor = 0x5853;
++ kbd->id.product = 0xffff;
++ kbd->evbit[0] = BIT(EV_KEY);
++ for (i = KEY_ESC; i < KEY_UNKNOWN; i++)
++ set_bit(i, kbd->keybit);
++ for (i = KEY_OK; i < KEY_MAX; i++)
++ set_bit(i, kbd->keybit);
++
++ ret = input_register_device(kbd);
++ if (ret) {
++ input_free_device(kbd);
++ xenbus_dev_fatal(dev, ret, "input_register_device(kbd)");
++ goto error;
++ }
++ info->kbd = kbd;
++
++ /* pointing device */
++ ptr = input_allocate_device();
++ if (!ptr)
++ goto error_nomem;
++ ptr->name = "Xen Virtual Pointer";
++ ptr->phys = info->phys;
++ ptr->id.bustype = BUS_PCI;
++ ptr->id.vendor = 0x5853;
++ ptr->id.product = 0xfffe;
++ ptr->evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_ABS);
++ for (i = BTN_LEFT; i <= BTN_TASK; i++)
++ set_bit(i, ptr->keybit);
++ ptr->relbit[0] = BIT(REL_X) | BIT(REL_Y) | BIT(REL_WHEEL);
++ input_set_abs_params(ptr, ABS_X, 0, XENFB_WIDTH, 0, 0);
++ input_set_abs_params(ptr, ABS_Y, 0, XENFB_HEIGHT, 0, 0);
++
++ ret = input_register_device(ptr);
++ if (ret) {
++ input_free_device(ptr);
++ xenbus_dev_fatal(dev, ret, "input_register_device(ptr)");
++ goto error;
++ }
++ info->ptr = ptr;
++
++ ret = xenkbd_connect_backend(dev, info);
++ if (ret < 0)
++ goto error;
++
++ return 0;
++
++ error_nomem:
++ ret = -ENOMEM;
++ xenbus_dev_fatal(dev, ret, "allocating device memory");
++ error:
++ xenkbd_remove(dev);
++ return ret;
++}
++
++static int xenkbd_resume(struct xenbus_device *dev)
++{
++ struct xenkbd_info *info = dev->dev.driver_data;
++
++ xenkbd_disconnect_backend(info);
++ info->page->in_cons = info->page->in_prod = 0;
++ info->page->out_cons = info->page->out_prod = 0;
++ return xenkbd_connect_backend(dev, info);
++}
++
++static int xenkbd_remove(struct xenbus_device *dev)
++{
++ struct xenkbd_info *info = dev->dev.driver_data;
++
++ xenkbd_disconnect_backend(info);
++ input_unregister_device(info->kbd);
++ input_unregister_device(info->ptr);
++ free_page((unsigned long)info->page);
++ kfree(info);
++ return 0;
++}
++
++static int xenkbd_connect_backend(struct xenbus_device *dev,
++ struct xenkbd_info *info)
++{
++ int ret;
++ struct xenbus_transaction xbt;
++
++ ret = bind_listening_port_to_irqhandler(
++ dev->otherend_id, input_handler, 0, "xenkbd", info);
++ if (ret < 0) {
++ xenbus_dev_fatal(dev, ret,
++ "bind_listening_port_to_irqhandler");
++ return ret;
++ }
++ info->irq = ret;
++
++ again:
++ ret = xenbus_transaction_start(&xbt);
++ if (ret) {
++ xenbus_dev_fatal(dev, ret, "starting transaction");
++ return ret;
++ }
++ ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu",
++ virt_to_mfn(info->page));
++ if (ret)
++ goto error_xenbus;
++ ret = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
++ irq_to_evtchn_port(info->irq));
++ if (ret)
++ goto error_xenbus;
++ ret = xenbus_transaction_end(xbt, 0);
++ if (ret) {
++ if (ret == -EAGAIN)
++ goto again;
++ xenbus_dev_fatal(dev, ret, "completing transaction");
++ return ret;
++ }
++
++ xenbus_switch_state(dev, XenbusStateInitialised);
++ return 0;
++
++ error_xenbus:
++ xenbus_transaction_end(xbt, 1);
++ xenbus_dev_fatal(dev, ret, "writing xenstore");
++ return ret;
++}
++
++static void xenkbd_disconnect_backend(struct xenkbd_info *info)
++{
++ if (info->irq >= 0)
++ unbind_from_irqhandler(info->irq, info);
++ info->irq = -1;
++}
++
++static void xenkbd_backend_changed(struct xenbus_device *dev,
++ enum xenbus_state backend_state)
++{
++ struct xenkbd_info *info = dev->dev.driver_data;
++ int ret, val;
++
++ switch (backend_state) {
++ case XenbusStateInitialising:
++ case XenbusStateInitialised:
++ case XenbusStateReconfiguring:
++ case XenbusStateReconfigured:
++ case XenbusStateUnknown:
++ case XenbusStateClosed:
++ break;
++
++ case XenbusStateInitWait:
++ InitWait:
++ ret = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
++ "feature-abs-pointer", "%d", &val);
++ if (ret < 0)
++ val = 0;
++ if (val) {
++ ret = xenbus_printf(XBT_NIL, info->xbdev->nodename,
++ "request-abs-pointer", "1");
++ if (ret)
++ ; /* FIXME */
++ }
++ xenbus_switch_state(dev, XenbusStateConnected);
++ break;
++
++ case XenbusStateConnected:
++ /*
++ * Work around xenbus race condition: If backend goes
++ * through InitWait to Connected fast enough, we can
++ * get Connected twice here.
++ */
++ if (dev->state != XenbusStateConnected)
++ goto InitWait; /* no InitWait seen yet, fudge it */
++
++ /* Set input abs params to match backend screen res */
++ if (xenbus_scanf(XBT_NIL, info->xbdev->otherend,
++ "width", "%d", &val) > 0 )
++ input_set_abs_params(info->ptr, ABS_X, 0, val, 0, 0);
++
++ if (xenbus_scanf(XBT_NIL, info->xbdev->otherend,
++ "height", "%d", &val) > 0 )
++ input_set_abs_params(info->ptr, ABS_Y, 0, val, 0, 0);
++
++ break;
++
++ case XenbusStateClosing:
++ xenbus_frontend_closed(dev);
++ break;
++ }
++}
++
++static const struct xenbus_device_id xenkbd_ids[] = {
++ { "vkbd" },
++ { "" }
++};
++MODULE_ALIAS("xen:vkbd");
++
++static struct xenbus_driver xenkbd_driver = {
++ .name = "vkbd",
++ .owner = THIS_MODULE,
++ .ids = xenkbd_ids,
++ .probe = xenkbd_probe,
++ .remove = xenkbd_remove,
++ .resume = xenkbd_resume,
++ .otherend_changed = xenkbd_backend_changed,
++};
++
++static int __init xenkbd_init(void)
++{
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ /* Nothing to do if running in dom0. */
++ if (is_initial_xendomain())
++ return -ENODEV;
++
++ return xenbus_register_frontend(&xenkbd_driver);
++}
++
++static void __exit xenkbd_cleanup(void)
++{
++ return xenbus_unregister_driver(&xenkbd_driver);
++}
++
++module_init(xenkbd_init);
++module_exit(xenkbd_cleanup);
++
++MODULE_LICENSE("GPL");
+Index: head-2008-11-25/drivers/xen/gntdev/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/gntdev/Makefile 2008-01-07 13:19:18.000000000 +0100
+@@ -0,0 +1 @@
++obj-$(CONFIG_XEN_GRANT_DEV) := gntdev.o
+Index: head-2008-11-25/drivers/xen/gntdev/gntdev.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/gntdev/gntdev.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,1074 @@
++/******************************************************************************
++ * gntdev.c
++ *
++ * Device for accessing (in user-space) pages that have been granted by other
++ * domains.
++ *
++ * Copyright (c) 2006-2007, D G Murray.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ */
++
++#include <asm/atomic.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/fs.h>
++#include <linux/device.h>
++#include <linux/mm.h>
++#include <linux/mman.h>
++#include <asm/uaccess.h>
++#include <asm/io.h>
++#include <xen/gnttab.h>
++#include <asm/hypervisor.h>
++#include <xen/balloon.h>
++#include <xen/evtchn.h>
++#include <xen/driver_util.h>
++
++#include <linux/types.h>
++#include <xen/public/gntdev.h>
++
++
++#define DRIVER_AUTHOR "Derek G. Murray <Derek.Murray@cl.cam.ac.uk>"
++#define DRIVER_DESC "User-space granted page access driver"
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR(DRIVER_AUTHOR);
++MODULE_DESCRIPTION(DRIVER_DESC);
++
++#define MAX_GRANTS_LIMIT 1024
++#define DEFAULT_MAX_GRANTS 128
++
++/* A slot can be in one of three states:
++ *
++ * 0. GNTDEV_SLOT_INVALID:
++ * This slot is not associated with a grant reference, and is therefore free
++ * to be overwritten by a new grant reference.
++ *
++ * 1. GNTDEV_SLOT_NOT_YET_MAPPED:
++ * This slot is associated with a grant reference (via the
++ * IOCTL_GNTDEV_MAP_GRANT_REF ioctl), but it has not yet been mmap()-ed.
++ *
++ * 2. GNTDEV_SLOT_MAPPED:
++ * This slot is associated with a grant reference, and has been mmap()-ed.
++ */
++typedef enum gntdev_slot_state {
++ GNTDEV_SLOT_INVALID = 0,
++ GNTDEV_SLOT_NOT_YET_MAPPED,
++ GNTDEV_SLOT_MAPPED
++} gntdev_slot_state_t;
++
++#define GNTDEV_INVALID_HANDLE -1
++#define GNTDEV_FREE_LIST_INVALID -1
++/* Each opened instance of gntdev is associated with a list of grants,
++ * represented by an array of elements of the following type,
++ * gntdev_grant_info_t.
++ */
++typedef struct gntdev_grant_info {
++ gntdev_slot_state_t state;
++ union {
++ uint32_t free_list_index;
++ struct {
++ domid_t domid;
++ grant_ref_t ref;
++ grant_handle_t kernel_handle;
++ grant_handle_t user_handle;
++ uint64_t dev_bus_addr;
++ } valid;
++ } u;
++} gntdev_grant_info_t;
++
++/* Private data structure, which is stored in the file pointer for files
++ * associated with this device.
++ */
++typedef struct gntdev_file_private_data {
++
++ /* Array of grant information. */
++ gntdev_grant_info_t *grants;
++ uint32_t grants_size;
++
++ /* Read/write semaphore used to protect the grants array. */
++ struct rw_semaphore grants_sem;
++
++ /* An array of indices of free slots in the grants array.
++ * N.B. An entry in this list may temporarily have the value
++ * GNTDEV_FREE_LIST_INVALID if the corresponding slot has been removed
++ * from the list by the contiguous allocator, but the list has not yet
++ * been compressed. However, this is not visible across invocations of
++ * the device.
++ */
++ int32_t *free_list;
++
++ /* The number of free slots in the grants array. */
++ uint32_t free_list_size;
++
++ /* Read/write semaphore used to protect the free list. */
++ struct rw_semaphore free_list_sem;
++
++ /* Index of the next slot after the most recent contiguous allocation,
++ * for use in a next-fit allocator.
++ */
++ uint32_t next_fit_index;
++
++ /* Used to map grants into the kernel, before mapping them into user
++ * space.
++ */
++ struct page **foreign_pages;
++
++} gntdev_file_private_data_t;
++
++/* Module lifecycle operations. */
++static int __init gntdev_init(void);
++static void __exit gntdev_exit(void);
++
++module_init(gntdev_init);
++module_exit(gntdev_exit);
++
++/* File operations. */
++static int gntdev_open(struct inode *inode, struct file *flip);
++static int gntdev_release(struct inode *inode, struct file *flip);
++static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma);
++static long gntdev_ioctl(struct file *flip,
++ unsigned int cmd, unsigned long arg);
++
++static const struct file_operations gntdev_fops = {
++ .owner = THIS_MODULE,
++ .open = gntdev_open,
++ .release = gntdev_release,
++ .mmap = gntdev_mmap,
++ .unlocked_ioctl = gntdev_ioctl
++};
++
++/* VM operations. */
++static void gntdev_vma_close(struct vm_area_struct *vma);
++static pte_t gntdev_clear_pte(struct vm_area_struct *vma, unsigned long addr,
++ pte_t *ptep, int is_fullmm);
++
++static struct vm_operations_struct gntdev_vmops = {
++ .close = gntdev_vma_close,
++ .zap_pte = gntdev_clear_pte
++};
++
++/* Global variables. */
++
++/* The driver major number, for use when unregistering the driver. */
++static int gntdev_major;
++
++#define GNTDEV_NAME "gntdev"
++
++/* Memory mapping functions
++ * ------------------------
++ *
++ * Every granted page is mapped into both kernel and user space, and the two
++ * following functions return the respective virtual addresses of these pages.
++ *
++ * When shadow paging is disabled, the granted page is mapped directly into
++ * user space; when it is enabled, it is mapped into the kernel and remapped
++ * into user space using vm_insert_page() (see gntdev_mmap(), below).
++ */
++
++/* Returns the virtual address (in user space) of the @page_index'th page
++ * in the given VM area.
++ */
++static inline unsigned long get_user_vaddr (struct vm_area_struct *vma,
++ int page_index)
++{
++ return (unsigned long) vma->vm_start + (page_index << PAGE_SHIFT);
++}
++
++/* Returns the virtual address (in kernel space) of the @slot_index'th page
++ * mapped by the gntdev instance that owns the given private data struct.
++ */
++static inline unsigned long get_kernel_vaddr (gntdev_file_private_data_t *priv,
++ int slot_index)
++{
++ unsigned long pfn;
++ void *kaddr;
++ pfn = page_to_pfn(priv->foreign_pages[slot_index]);
++ kaddr = pfn_to_kaddr(pfn);
++ return (unsigned long) kaddr;
++}
++
++/* Helper functions. */
++
++/* Adds information about a grant reference to the list of grants in the file's
++ * private data structure. Returns non-zero on failure. On success, sets the
++ * value of *offset to the offset that should be mmap()-ed in order to map the
++ * grant reference.
++ */
++static int add_grant_reference(struct file *flip,
++ struct ioctl_gntdev_grant_ref *op,
++ uint64_t *offset)
++{
++ gntdev_file_private_data_t *private_data
++ = (gntdev_file_private_data_t *) flip->private_data;
++
++ uint32_t slot_index;
++
++ if (unlikely(private_data->free_list_size == 0)) {
++ return -ENOMEM;
++ }
++
++ slot_index = private_data->free_list[--private_data->free_list_size];
++ private_data->free_list[private_data->free_list_size]
++ = GNTDEV_FREE_LIST_INVALID;
++
++ /* Copy the grant information into file's private data. */
++ private_data->grants[slot_index].state = GNTDEV_SLOT_NOT_YET_MAPPED;
++ private_data->grants[slot_index].u.valid.domid = op->domid;
++ private_data->grants[slot_index].u.valid.ref = op->ref;
++
++ /* The offset is calculated as the index of the chosen entry in the
++ * file's private data's array of grant information. This is then
++ * shifted to give an offset into the virtual "file address space".
++ */
++ *offset = slot_index << PAGE_SHIFT;
++
++ return 0;
++}
++
++/* Adds the @count grant references to the contiguous range in the slot array
++ * beginning at @first_slot. It is assumed that @first_slot was returned by a
++ * previous invocation of find_contiguous_free_range(), during the same
++ * invocation of the driver.
++ */
++static int add_grant_references(struct file *flip,
++ int count,
++ struct ioctl_gntdev_grant_ref *ops,
++ uint32_t first_slot)
++{
++ gntdev_file_private_data_t *private_data
++ = (gntdev_file_private_data_t *) flip->private_data;
++ int i;
++
++ for (i = 0; i < count; ++i) {
++
++ /* First, mark the slot's entry in the free list as invalid. */
++ int free_list_index =
++ private_data->grants[first_slot+i].u.free_list_index;
++ private_data->free_list[free_list_index] =
++ GNTDEV_FREE_LIST_INVALID;
++
++ /* Now, update the slot. */
++ private_data->grants[first_slot+i].state =
++ GNTDEV_SLOT_NOT_YET_MAPPED;
++ private_data->grants[first_slot+i].u.valid.domid =
++ ops[i].domid;
++ private_data->grants[first_slot+i].u.valid.ref = ops[i].ref;
++ }
++
++ return 0;
++}
++
++/* Scans through the free list for @flip, removing entries that are marked as
++ * GNTDEV_SLOT_INVALID. This will reduce the recorded size of the free list to
++ * the number of valid entries.
++ */
++static void compress_free_list(struct file *flip)
++{
++ gntdev_file_private_data_t *private_data
++ = (gntdev_file_private_data_t *) flip->private_data;
++ int i, j = 0, old_size, slot_index;
++
++ old_size = private_data->free_list_size;
++ for (i = 0; i < old_size; ++i) {
++ if (private_data->free_list[i] != GNTDEV_FREE_LIST_INVALID) {
++ if (i > j) {
++ slot_index = private_data->free_list[i];
++ private_data->free_list[j] = slot_index;
++ private_data->grants[slot_index].u
++ .free_list_index = j;
++ private_data->free_list[i]
++ = GNTDEV_FREE_LIST_INVALID;
++ }
++ ++j;
++ } else {
++ --private_data->free_list_size;
++ }
++ }
++}
++
++/* Searches the grant array in the private data of @flip for a range of
++ * @num_slots contiguous slots in the GNTDEV_SLOT_INVALID state.
++ *
++ * Returns the index of the first slot if a range is found, otherwise -ENOMEM.
++ */
++static int find_contiguous_free_range(struct file *flip,
++ uint32_t num_slots)
++{
++ gntdev_file_private_data_t *private_data
++ = (gntdev_file_private_data_t *) flip->private_data;
++
++ int i;
++ int start_index = private_data->next_fit_index;
++ int range_start = 0, range_length;
++
++ if (private_data->free_list_size < num_slots) {
++ return -ENOMEM;
++ }
++
++ /* First search from the start_index to the end of the array. */
++ range_length = 0;
++ for (i = start_index; i < private_data->grants_size; ++i) {
++ if (private_data->grants[i].state == GNTDEV_SLOT_INVALID) {
++ if (range_length == 0) {
++ range_start = i;
++ }
++ ++range_length;
++ if (range_length == num_slots) {
++ return range_start;
++ }
++ }
++ }
++
++ /* Now search from the start of the array to the start_index. */
++ range_length = 0;
++ for (i = 0; i < start_index; ++i) {
++ if (private_data->grants[i].state == GNTDEV_SLOT_INVALID) {
++ if (range_length == 0) {
++ range_start = i;
++ }
++ ++range_length;
++ if (range_length == num_slots) {
++ return range_start;
++ }
++ }
++ }
++
++ return -ENOMEM;
++}
++
++static int init_private_data(gntdev_file_private_data_t *priv,
++ uint32_t max_grants)
++{
++ int i;
++
++ /* Allocate space for the kernel-mapping of granted pages. */
++ priv->foreign_pages =
++ alloc_empty_pages_and_pagevec(max_grants);
++ if (!priv->foreign_pages)
++ goto nomem_out;
++
++ /* Allocate the grant list and free-list. */
++ priv->grants = kmalloc(max_grants * sizeof(gntdev_grant_info_t),
++ GFP_KERNEL);
++ if (!priv->grants)
++ goto nomem_out2;
++ priv->free_list = kmalloc(max_grants * sizeof(int32_t), GFP_KERNEL);
++ if (!priv->free_list)
++ goto nomem_out3;
++
++ /* Initialise the free-list, which contains all slots at first. */
++ for (i = 0; i < max_grants; ++i) {
++ priv->free_list[max_grants - i - 1] = i;
++ priv->grants[i].state = GNTDEV_SLOT_INVALID;
++ priv->grants[i].u.free_list_index = max_grants - i - 1;
++ }
++ priv->grants_size = max_grants;
++ priv->free_list_size = max_grants;
++ priv->next_fit_index = 0;
++
++ return 0;
++
++nomem_out3:
++ kfree(priv->grants);
++nomem_out2:
++ free_empty_pages_and_pagevec(priv->foreign_pages, max_grants);
++nomem_out:
++ return -ENOMEM;
++
++}
++
++/* Interface functions. */
++
++/* Initialises the driver. Called when the module is loaded. */
++static int __init gntdev_init(void)
++{
++ struct class *class;
++ struct class_device *device;
++
++ if (!is_running_on_xen()) {
++ printk(KERN_ERR "You must be running Xen to use gntdev\n");
++ return -ENODEV;
++ }
++
++ gntdev_major = register_chrdev(0, GNTDEV_NAME, &gntdev_fops);
++ if (gntdev_major < 0)
++ {
++ printk(KERN_ERR "Could not register gntdev device\n");
++ return -ENOMEM;
++ }
++
++ /* Note that if the sysfs code fails, we will still initialise the
++ * device, and output the major number so that the device can be
++ * created manually using mknod.
++ */
++ if ((class = get_xen_class()) == NULL) {
++ printk(KERN_ERR "Error setting up xen_class\n");
++ printk(KERN_ERR "gntdev created with major number = %d\n",
++ gntdev_major);
++ return 0;
++ }
++
++ device = class_device_create(class, NULL, MKDEV(gntdev_major, 0),
++ NULL, GNTDEV_NAME);
++ if (IS_ERR(device)) {
++ printk(KERN_ERR "Error creating gntdev device in xen_class\n");
++ printk(KERN_ERR "gntdev created with major number = %d\n",
++ gntdev_major);
++ return 0;
++ }
++
++ return 0;
++}
++
++/* Cleans up and unregisters the driver. Called when the driver is unloaded.
++ */
++static void __exit gntdev_exit(void)
++{
++ struct class *class;
++ if ((class = get_xen_class()) != NULL)
++ class_device_destroy(class, MKDEV(gntdev_major, 0));
++ unregister_chrdev(gntdev_major, GNTDEV_NAME);
++}
++
++/* Called when the device is opened. */
++static int gntdev_open(struct inode *inode, struct file *flip)
++{
++ gntdev_file_private_data_t *private_data;
++
++ try_module_get(THIS_MODULE);
++
++ /* Allocate space for the per-instance private data. */
++ private_data = kmalloc(sizeof(*private_data), GFP_KERNEL);
++ if (!private_data)
++ goto nomem_out;
++
++ /* These will be lazily initialised by init_private_data. */
++ private_data->grants = NULL;
++ private_data->free_list = NULL;
++ private_data->foreign_pages = NULL;
++
++ init_rwsem(&private_data->grants_sem);
++ init_rwsem(&private_data->free_list_sem);
++
++ flip->private_data = private_data;
++
++ return 0;
++
++nomem_out:
++ return -ENOMEM;
++}
++
++/* Called when the device is closed.
++ */
++static int gntdev_release(struct inode *inode, struct file *flip)
++{
++ if (flip->private_data) {
++ gntdev_file_private_data_t *private_data =
++ (gntdev_file_private_data_t *) flip->private_data;
++ if (private_data->foreign_pages)
++ free_empty_pages_and_pagevec
++ (private_data->foreign_pages,
++ private_data->grants_size);
++ if (private_data->grants)
++ kfree(private_data->grants);
++ if (private_data->free_list)
++ kfree(private_data->free_list);
++ kfree(private_data);
++ }
++ module_put(THIS_MODULE);
++ return 0;
++}
++
++/* Called when an attempt is made to mmap() the device. The private data from
++ * @flip contains the list of grant references that can be mapped. The vm_pgoff
++ * field of @vma contains the index into that list that refers to the grant
++ * reference that will be mapped. Only mappings that are a multiple of
++ * PAGE_SIZE are handled.
++ */
++static int gntdev_mmap (struct file *flip, struct vm_area_struct *vma)
++{
++ struct gnttab_map_grant_ref op;
++ unsigned long slot_index = vma->vm_pgoff;
++ unsigned long kernel_vaddr, user_vaddr;
++ uint32_t size = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
++ uint64_t ptep;
++ int ret;
++ int flags;
++ int i;
++ struct page *page;
++ gntdev_file_private_data_t *private_data = flip->private_data;
++
++ if (unlikely(!private_data)) {
++ printk(KERN_ERR "File's private data is NULL.\n");
++ return -EINVAL;
++ }
++
++ /* Test to make sure that the grants array has been initialised. */
++ down_read(&private_data->grants_sem);
++ if (unlikely(!private_data->grants)) {
++ up_read(&private_data->grants_sem);
++ printk(KERN_ERR "Attempted to mmap before ioctl.\n");
++ return -EINVAL;
++ }
++ up_read(&private_data->grants_sem);
++
++ if (unlikely((size <= 0) ||
++ (size + slot_index) > private_data->grants_size)) {
++ printk(KERN_ERR "Invalid number of pages or offset"
++ "(num_pages = %d, first_slot = %ld).\n",
++ size, slot_index);
++ return -ENXIO;
++ }
++
++ if ((vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_SHARED)) {
++ printk(KERN_ERR "Writable mappings must be shared.\n");
++ return -EINVAL;
++ }
++
++ /* Slots must be in the NOT_YET_MAPPED state. */
++ down_write(&private_data->grants_sem);
++ for (i = 0; i < size; ++i) {
++ if (private_data->grants[slot_index + i].state !=
++ GNTDEV_SLOT_NOT_YET_MAPPED) {
++ printk(KERN_ERR "Slot (index = %ld) is in the wrong "
++ "state (%d).\n", slot_index + i,
++ private_data->grants[slot_index + i].state);
++ up_write(&private_data->grants_sem);
++ return -EINVAL;
++ }
++ }
++
++ /* Install the hook for unmapping. */
++ vma->vm_ops = &gntdev_vmops;
++
++ /* The VM area contains pages from another VM. */
++ vma->vm_flags |= VM_FOREIGN;
++ vma->vm_private_data = kzalloc(size * sizeof(struct page *),
++ GFP_KERNEL);
++ if (vma->vm_private_data == NULL) {
++ printk(KERN_ERR "Couldn't allocate mapping structure for VM "
++ "area.\n");
++ return -ENOMEM;
++ }
++
++ /* This flag prevents Bad PTE errors when the memory is unmapped. */
++ vma->vm_flags |= VM_RESERVED;
++
++ /* This flag prevents this VM area being copied on a fork(). A better
++ * behaviour might be to explicitly carry out the appropriate mappings
++ * on fork(), but I don't know if there's a hook for this.
++ */
++ vma->vm_flags |= VM_DONTCOPY;
++
++#ifdef CONFIG_X86
++ /* This flag ensures that the page tables are not unpinned before the
++ * VM area is unmapped. Therefore Xen still recognises the PTE as
++ * belonging to an L1 pagetable, and the grant unmap operation will
++ * succeed, even if the process does not exit cleanly.
++ */
++ vma->vm_mm->context.has_foreign_mappings = 1;
++#endif
++
++ for (i = 0; i < size; ++i) {
++
++ flags = GNTMAP_host_map;
++ if (!(vma->vm_flags & VM_WRITE))
++ flags |= GNTMAP_readonly;
++
++ kernel_vaddr = get_kernel_vaddr(private_data, slot_index + i);
++ user_vaddr = get_user_vaddr(vma, i);
++ page = pfn_to_page(__pa(kernel_vaddr) >> PAGE_SHIFT);
++
++ gnttab_set_map_op(&op, kernel_vaddr, flags,
++ private_data->grants[slot_index+i]
++ .u.valid.ref,
++ private_data->grants[slot_index+i]
++ .u.valid.domid);
++
++ /* Carry out the mapping of the grant reference. */
++ ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref,
++ &op, 1);
++ BUG_ON(ret);
++ if (op.status) {
++ printk(KERN_ERR "Error mapping the grant reference "
++ "into the kernel (%d). domid = %d; ref = %d\n",
++ op.status,
++ private_data->grants[slot_index+i]
++ .u.valid.domid,
++ private_data->grants[slot_index+i]
++ .u.valid.ref);
++ goto undo_map_out;
++ }
++
++ /* Store a reference to the page that will be mapped into user
++ * space.
++ */
++ ((struct page **) vma->vm_private_data)[i] = page;
++
++ /* Mark mapped page as reserved. */
++ SetPageReserved(page);
++
++ /* Record the grant handle, for use in the unmap operation. */
++ private_data->grants[slot_index+i].u.valid.kernel_handle =
++ op.handle;
++ private_data->grants[slot_index+i].u.valid.dev_bus_addr =
++ op.dev_bus_addr;
++
++ private_data->grants[slot_index+i].state = GNTDEV_SLOT_MAPPED;
++ private_data->grants[slot_index+i].u.valid.user_handle =
++ GNTDEV_INVALID_HANDLE;
++
++ /* Now perform the mapping to user space. */
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++
++ /* NOT USING SHADOW PAGE TABLES. */
++ /* In this case, we map the grant(s) straight into user
++ * space.
++ */
++
++ /* Get the machine address of the PTE for the user
++ * page.
++ */
++ if ((ret = create_lookup_pte_addr(vma->vm_mm,
++ vma->vm_start
++ + (i << PAGE_SHIFT),
++ &ptep)))
++ {
++ printk(KERN_ERR "Error obtaining PTE pointer "
++ "(%d).\n", ret);
++ goto undo_map_out;
++ }
++
++ /* Configure the map operation. */
++
++ /* The reference is to be used by host CPUs. */
++ flags = GNTMAP_host_map;
++
++ /* Specifies a user space mapping. */
++ flags |= GNTMAP_application_map;
++
++ /* The map request contains the machine address of the
++ * PTE to update.
++ */
++ flags |= GNTMAP_contains_pte;
++
++ if (!(vma->vm_flags & VM_WRITE))
++ flags |= GNTMAP_readonly;
++
++ gnttab_set_map_op(&op, ptep, flags,
++ private_data->grants[slot_index+i]
++ .u.valid.ref,
++ private_data->grants[slot_index+i]
++ .u.valid.domid);
++
++ /* Carry out the mapping of the grant reference. */
++ ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref,
++ &op, 1);
++ BUG_ON(ret);
++ if (op.status) {
++ printk(KERN_ERR "Error mapping the grant "
++ "reference into user space (%d). domid "
++ "= %d; ref = %d\n", op.status,
++ private_data->grants[slot_index+i].u
++ .valid.domid,
++ private_data->grants[slot_index+i].u
++ .valid.ref);
++ goto undo_map_out;
++ }
++
++ /* Record the grant handle, for use in the unmap
++ * operation.
++ */
++ private_data->grants[slot_index+i].u.
++ valid.user_handle = op.handle;
++
++ /* Update p2m structure with the new mapping. */
++ set_phys_to_machine(__pa(kernel_vaddr) >> PAGE_SHIFT,
++ FOREIGN_FRAME(private_data->
++ grants[slot_index+i]
++ .u.valid.dev_bus_addr
++ >> PAGE_SHIFT));
++ } else {
++ /* USING SHADOW PAGE TABLES. */
++ /* In this case, we simply insert the page into the VM
++ * area. */
++ ret = vm_insert_page(vma, user_vaddr, page);
++ }
++
++ }
++
++ up_write(&private_data->grants_sem);
++ return 0;
++
++undo_map_out:
++ /* If we have a mapping failure, the unmapping will be taken care of
++ * by do_mmap_pgoff(), which will eventually call gntdev_clear_pte().
++ * All we need to do here is free the vma_private_data.
++ */
++ kfree(vma->vm_private_data);
++
++ /* THIS IS VERY UNPLEASANT: do_mmap_pgoff() will set the vma->vm_file
++ * to NULL on failure. However, we need this in gntdev_clear_pte() to
++ * unmap the grants. Therefore, we smuggle a reference to the file's
++ * private data in the VM area's private data pointer.
++ */
++ vma->vm_private_data = private_data;
++
++ up_write(&private_data->grants_sem);
++
++ return -ENOMEM;
++}
++
++static pte_t gntdev_clear_pte(struct vm_area_struct *vma, unsigned long addr,
++ pte_t *ptep, int is_fullmm)
++{
++ int slot_index, ret;
++ pte_t copy;
++ struct gnttab_unmap_grant_ref op;
++ gntdev_file_private_data_t *private_data;
++
++ /* THIS IS VERY UNPLEASANT: do_mmap_pgoff() will set the vma->vm_file
++ * to NULL on failure. However, we need this in gntdev_clear_pte() to
++ * unmap the grants. Therefore, we smuggle a reference to the file's
++ * private data in the VM area's private data pointer.
++ */
++ if (vma->vm_file) {
++ private_data = (gntdev_file_private_data_t *)
++ vma->vm_file->private_data;
++ } else if (vma->vm_private_data) {
++ private_data = (gntdev_file_private_data_t *)
++ vma->vm_private_data;
++ } else {
++ private_data = NULL; /* gcc warning */
++ BUG();
++ }
++
++ /* Copy the existing value of the PTE for returning. */
++ copy = *ptep;
++
++ /* Calculate the grant relating to this PTE. */
++ slot_index = vma->vm_pgoff + ((addr - vma->vm_start) >> PAGE_SHIFT);
++
++ /* Only unmap grants if the slot has been mapped. This could be being
++ * called from a failing mmap().
++ */
++ if (private_data->grants[slot_index].state == GNTDEV_SLOT_MAPPED) {
++
++ /* First, we clear the user space mapping, if it has been made.
++ */
++ if (private_data->grants[slot_index].u.valid.user_handle !=
++ GNTDEV_INVALID_HANDLE &&
++ !xen_feature(XENFEAT_auto_translated_physmap)) {
++ /* NOT USING SHADOW PAGE TABLES. */
++ gnttab_set_unmap_op(&op, virt_to_machine(ptep),
++ GNTMAP_contains_pte,
++ private_data->grants[slot_index]
++ .u.valid.user_handle);
++ ret = HYPERVISOR_grant_table_op(
++ GNTTABOP_unmap_grant_ref, &op, 1);
++ BUG_ON(ret);
++ if (op.status)
++ printk("User unmap grant status = %d\n",
++ op.status);
++ } else {
++ /* USING SHADOW PAGE TABLES. */
++ pte_clear_full(vma->vm_mm, addr, ptep, is_fullmm);
++ }
++
++ /* Finally, we unmap the grant from kernel space. */
++ gnttab_set_unmap_op(&op,
++ get_kernel_vaddr(private_data, slot_index),
++ GNTMAP_host_map,
++ private_data->grants[slot_index].u.valid
++ .kernel_handle);
++ ret = HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref,
++ &op, 1);
++ BUG_ON(ret);
++ if (op.status)
++ printk("Kernel unmap grant status = %d\n", op.status);
++
++
++ /* Return slot to the not-yet-mapped state, so that it may be
++ * mapped again, or removed by a subsequent ioctl.
++ */
++ private_data->grants[slot_index].state =
++ GNTDEV_SLOT_NOT_YET_MAPPED;
++
++ /* Invalidate the physical to machine mapping for this page. */
++ set_phys_to_machine(__pa(get_kernel_vaddr(private_data,
++ slot_index))
++ >> PAGE_SHIFT, INVALID_P2M_ENTRY);
++
++ } else {
++ pte_clear_full(vma->vm_mm, addr, ptep, is_fullmm);
++ }
++
++ return copy;
++}
++
++/* "Destructor" for a VM area.
++ */
++static void gntdev_vma_close(struct vm_area_struct *vma) {
++ if (vma->vm_private_data) {
++ kfree(vma->vm_private_data);
++ }
++}
++
++/* Called when an ioctl is made on the device.
++ */
++static long gntdev_ioctl(struct file *flip,
++ unsigned int cmd, unsigned long arg)
++{
++ int rc = 0;
++ gntdev_file_private_data_t *private_data =
++ (gntdev_file_private_data_t *) flip->private_data;
++
++ /* On the first invocation, we will lazily initialise the grant array
++ * and free-list.
++ */
++ if (unlikely(!private_data->grants)
++ && likely(cmd != IOCTL_GNTDEV_SET_MAX_GRANTS)) {
++ down_write(&private_data->grants_sem);
++
++ if (unlikely(private_data->grants)) {
++ up_write(&private_data->grants_sem);
++ goto private_data_initialised;
++ }
++
++ /* Just use the default. Setting to a non-default is handled
++ * in the ioctl switch.
++ */
++ rc = init_private_data(private_data, DEFAULT_MAX_GRANTS);
++
++ up_write(&private_data->grants_sem);
++
++ if (rc) {
++ printk (KERN_ERR "Initialising gntdev private data "
++ "failed.\n");
++ return rc;
++ }
++ }
++
++private_data_initialised:
++ switch (cmd) {
++ case IOCTL_GNTDEV_MAP_GRANT_REF:
++ {
++ struct ioctl_gntdev_map_grant_ref op;
++ down_write(&private_data->grants_sem);
++ down_write(&private_data->free_list_sem);
++
++ if ((rc = copy_from_user(&op, (void __user *) arg,
++ sizeof(op)))) {
++ rc = -EFAULT;
++ goto map_out;
++ }
++ if (unlikely(op.count <= 0)) {
++ rc = -EINVAL;
++ goto map_out;
++ }
++
++ if (op.count == 1) {
++ if ((rc = add_grant_reference(flip, &op.refs[0],
++ &op.index)) < 0) {
++ printk(KERN_ERR "Adding grant reference "
++ "failed (%d).\n", rc);
++ goto map_out;
++ }
++ } else {
++ struct ioctl_gntdev_grant_ref *refs, *u;
++ refs = kmalloc(op.count * sizeof(*refs), GFP_KERNEL);
++ if (!refs) {
++ rc = -ENOMEM;
++ goto map_out;
++ }
++ u = ((struct ioctl_gntdev_map_grant_ref *)arg)->refs;
++ if ((rc = copy_from_user(refs,
++ (void __user *)u,
++ sizeof(*refs) * op.count))) {
++ printk(KERN_ERR "Copying refs from user failed"
++ " (%d).\n", rc);
++ rc = -EINVAL;
++ goto map_out;
++ }
++ if ((rc = find_contiguous_free_range(flip, op.count))
++ < 0) {
++ printk(KERN_ERR "Finding contiguous range "
++ "failed (%d).\n", rc);
++ kfree(refs);
++ goto map_out;
++ }
++ op.index = rc << PAGE_SHIFT;
++ if ((rc = add_grant_references(flip, op.count,
++ refs, rc))) {
++ printk(KERN_ERR "Adding grant references "
++ "failed (%d).\n", rc);
++ kfree(refs);
++ goto map_out;
++ }
++ compress_free_list(flip);
++ kfree(refs);
++ }
++ if ((rc = copy_to_user((void __user *) arg,
++ &op,
++ sizeof(op)))) {
++ printk(KERN_ERR "Copying result back to user failed "
++ "(%d)\n", rc);
++ rc = -EFAULT;
++ goto map_out;
++ }
++ map_out:
++ up_write(&private_data->grants_sem);
++ up_write(&private_data->free_list_sem);
++ return rc;
++ }
++ case IOCTL_GNTDEV_UNMAP_GRANT_REF:
++ {
++ struct ioctl_gntdev_unmap_grant_ref op;
++ int i, start_index;
++
++ down_write(&private_data->grants_sem);
++ down_write(&private_data->free_list_sem);
++
++ if ((rc = copy_from_user(&op,
++ (void __user *) arg,
++ sizeof(op)))) {
++ rc = -EFAULT;
++ goto unmap_out;
++ }
++
++ start_index = op.index >> PAGE_SHIFT;
++
++ /* First, check that all pages are in the NOT_YET_MAPPED
++ * state.
++ */
++ for (i = 0; i < op.count; ++i) {
++ if (unlikely
++ (private_data->grants[start_index + i].state
++ != GNTDEV_SLOT_NOT_YET_MAPPED)) {
++ if (private_data->grants[start_index + i].state
++ == GNTDEV_SLOT_INVALID) {
++ printk(KERN_ERR
++ "Tried to remove an invalid "
++ "grant at offset 0x%x.",
++ (start_index + i)
++ << PAGE_SHIFT);
++ rc = -EINVAL;
++ } else {
++ printk(KERN_ERR
++ "Tried to remove a grant which "
++ "is currently mmap()-ed at "
++ "offset 0x%x.",
++ (start_index + i)
++ << PAGE_SHIFT);
++ rc = -EBUSY;
++ }
++ goto unmap_out;
++ }
++ }
++
++ /* Unmap pages and add them to the free list.
++ */
++ for (i = 0; i < op.count; ++i) {
++ private_data->grants[start_index+i].state =
++ GNTDEV_SLOT_INVALID;
++ private_data->grants[start_index+i].u.free_list_index =
++ private_data->free_list_size;
++ private_data->free_list[private_data->free_list_size] =
++ start_index + i;
++ ++private_data->free_list_size;
++ }
++
++ unmap_out:
++ up_write(&private_data->grants_sem);
++ up_write(&private_data->free_list_sem);
++ return rc;
++ }
++ case IOCTL_GNTDEV_GET_OFFSET_FOR_VADDR:
++ {
++ struct ioctl_gntdev_get_offset_for_vaddr op;
++ struct vm_area_struct *vma;
++ unsigned long vaddr;
++
++ if ((rc = copy_from_user(&op,
++ (void __user *) arg,
++ sizeof(op)))) {
++ rc = -EFAULT;
++ goto get_offset_out;
++ }
++ vaddr = (unsigned long)op.vaddr;
++
++ down_read(¤t->mm->mmap_sem);
++ vma = find_vma(current->mm, vaddr);
++ if (vma == NULL) {
++ rc = -EFAULT;
++ goto get_offset_unlock_out;
++ }
++ if ((!vma->vm_ops) || (vma->vm_ops != &gntdev_vmops)) {
++ printk(KERN_ERR "The vaddr specified does not belong "
++ "to a gntdev instance: %#lx\n", vaddr);
++ rc = -EFAULT;
++ goto get_offset_unlock_out;
++ }
++ if (vma->vm_start != vaddr) {
++ printk(KERN_ERR "The vaddr specified in an "
++ "IOCTL_GNTDEV_GET_OFFSET_FOR_VADDR must be at "
++ "the start of the VM area. vma->vm_start = "
++ "%#lx; vaddr = %#lx\n",
++ vma->vm_start, vaddr);
++ rc = -EFAULT;
++ goto get_offset_unlock_out;
++ }
++ op.offset = vma->vm_pgoff << PAGE_SHIFT;
++ op.count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
++ up_read(¤t->mm->mmap_sem);
++ if ((rc = copy_to_user((void __user *) arg,
++ &op,
++ sizeof(op)))) {
++ rc = -EFAULT;
++ goto get_offset_out;
++ }
++ goto get_offset_out;
++ get_offset_unlock_out:
++ up_read(¤t->mm->mmap_sem);
++ get_offset_out:
++ return rc;
++ }
++ case IOCTL_GNTDEV_SET_MAX_GRANTS:
++ {
++ struct ioctl_gntdev_set_max_grants op;
++ if ((rc = copy_from_user(&op,
++ (void __user *) arg,
++ sizeof(op)))) {
++ rc = -EFAULT;
++ goto set_max_out;
++ }
++ down_write(&private_data->grants_sem);
++ if (private_data->grants) {
++ rc = -EBUSY;
++ goto set_max_unlock_out;
++ }
++ if (op.count > MAX_GRANTS_LIMIT) {
++ rc = -EINVAL;
++ goto set_max_unlock_out;
++ }
++ rc = init_private_data(private_data, op.count);
++ set_max_unlock_out:
++ up_write(&private_data->grants_sem);
++ set_max_out:
++ return rc;
++ }
++ default:
++ return -ENOIOCTLCMD;
++ }
++
++ return 0;
++}
+Index: head-2008-11-25/drivers/xen/netback/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netback/Makefile 2007-07-12 08:54:23.000000000 +0200
+@@ -0,0 +1,5 @@
++obj-$(CONFIG_XEN_NETDEV_BACKEND) := netbk.o
++obj-$(CONFIG_XEN_NETDEV_LOOPBACK) += netloop.o
++
++netbk-y := netback.o xenbus.o interface.o accel.o
++netloop-y := loopback.o
+Index: head-2008-11-25/drivers/xen/netback/accel.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netback/accel.c 2008-01-07 13:19:18.000000000 +0100
+@@ -0,0 +1,269 @@
++/******************************************************************************
++ * drivers/xen/netback/accel.c
++ *
++ * Interface between backend virtual network device and accelerated plugin.
++ *
++ * Copyright (C) 2007 Solarflare Communications, Inc
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/list.h>
++#include <asm/atomic.h>
++#include <xen/xenbus.h>
++#include <linux/mutex.h>
++
++#include "common.h"
++
++#if 0
++#undef DPRINTK
++#define DPRINTK(fmt, args...) \
++ printk("netback/accel (%s:%d) " fmt ".\n", __FUNCTION__, __LINE__, ##args)
++#endif
++
++/*
++ * A list of available netback accelerator plugin modules (each list
++ * entry is of type struct netback_accelerator)
++ */
++static struct list_head accelerators_list;
++/* Lock used to protect access to accelerators_list */
++DEFINE_MUTEX(accelerators_mutex);
++
++/*
++ * Compare a backend to an accelerator, and decide if they are
++ * compatible (i.e. if the accelerator should be used by the
++ * backend)
++ */
++static int match_accelerator(struct xenbus_device *xendev,
++ struct backend_info *be,
++ struct netback_accelerator *accelerator)
++{
++ int rc = 0;
++ char *eth_name = xenbus_read(XBT_NIL, xendev->nodename, "accel", NULL);
++
++ if (IS_ERR(eth_name)) {
++ /* Probably means not present */
++ DPRINTK("%s: no match due to xenbus_read accel error %d\n",
++ __FUNCTION__, PTR_ERR(eth_name));
++ return 0;
++ } else {
++ if (!strcmp(eth_name, accelerator->eth_name))
++ rc = 1;
++ kfree(eth_name);
++ return rc;
++ }
++}
++
++
++static void do_probe(struct backend_info *be,
++ struct netback_accelerator *accelerator,
++ struct xenbus_device *xendev)
++{
++ be->accelerator = accelerator;
++ atomic_inc(&be->accelerator->use_count);
++ if (be->accelerator->hooks->probe(xendev) != 0) {
++ atomic_dec(&be->accelerator->use_count);
++ module_put(be->accelerator->hooks->owner);
++ be->accelerator = NULL;
++ }
++}
++
++
++/*
++ * Notify suitable backends that a new accelerator is available and
++ * connected. This will also notify the accelerator plugin module
++ * that it is being used for a device through the probe hook.
++ */
++static int netback_accelerator_probe_backend(struct device *dev, void *arg)
++{
++ struct netback_accelerator *accelerator =
++ (struct netback_accelerator *)arg;
++ struct xenbus_device *xendev = to_xenbus_device(dev);
++
++ if (!strcmp("vif", xendev->devicetype)) {
++ struct backend_info *be = xendev->dev.driver_data;
++
++ if (match_accelerator(xendev, be, accelerator) &&
++ try_module_get(accelerator->hooks->owner)) {
++ do_probe(be, accelerator, xendev);
++ }
++ }
++ return 0;
++}
++
++
++/*
++ * Notify suitable backends that an accelerator is unavailable.
++ */
++static int netback_accelerator_remove_backend(struct device *dev, void *arg)
++{
++ struct xenbus_device *xendev = to_xenbus_device(dev);
++ struct netback_accelerator *accelerator =
++ (struct netback_accelerator *)arg;
++
++ if (!strcmp("vif", xendev->devicetype)) {
++ struct backend_info *be = xendev->dev.driver_data;
++
++ if (be->accelerator == accelerator) {
++ be->accelerator->hooks->remove(xendev);
++ atomic_dec(&be->accelerator->use_count);
++ module_put(be->accelerator->hooks->owner);
++ be->accelerator = NULL;
++ }
++ }
++ return 0;
++}
++
++
++
++/*
++ * Entry point for an netback accelerator plugin module. Called to
++ * advertise its presence, and connect to any suitable backends.
++ */
++int netback_connect_accelerator(unsigned version, int id, const char *eth_name,
++ struct netback_accel_hooks *hooks)
++{
++ struct netback_accelerator *new_accelerator;
++ unsigned eth_name_len;
++
++ if (version != NETBACK_ACCEL_VERSION) {
++ if (version > NETBACK_ACCEL_VERSION) {
++ /* Caller has higher version number, leave it
++ up to them to decide whether to continue.
++ They can recall with a lower number if
++ they're happy to be compatible with us */
++ return NETBACK_ACCEL_VERSION;
++ } else {
++ /* We have a more recent version than caller.
++ Currently reject, but may in future be able
++ to be backwardly compatible */
++ return -EPROTO;
++ }
++ }
++
++ new_accelerator =
++ kmalloc(sizeof(struct netback_accelerator), GFP_KERNEL);
++ if (!new_accelerator) {
++ DPRINTK("%s: failed to allocate memory for accelerator\n",
++ __FUNCTION__);
++ return -ENOMEM;
++ }
++
++ new_accelerator->id = id;
++
++ eth_name_len = strlen(eth_name)+1;
++ new_accelerator->eth_name = kmalloc(eth_name_len, GFP_KERNEL);
++ if (!new_accelerator->eth_name) {
++ DPRINTK("%s: failed to allocate memory for eth_name string\n",
++ __FUNCTION__);
++ kfree(new_accelerator);
++ return -ENOMEM;
++ }
++ strlcpy(new_accelerator->eth_name, eth_name, eth_name_len);
++
++ new_accelerator->hooks = hooks;
++
++ atomic_set(&new_accelerator->use_count, 0);
++
++ mutex_lock(&accelerators_mutex);
++ list_add(&new_accelerator->link, &accelerators_list);
++
++ /* tell existing backends about new plugin */
++ xenbus_for_each_backend(new_accelerator,
++ netback_accelerator_probe_backend);
++
++ mutex_unlock(&accelerators_mutex);
++
++ return 0;
++
++}
++EXPORT_SYMBOL_GPL(netback_connect_accelerator);
++
++
++/*
++ * Disconnect an accelerator plugin module that has previously been
++ * connected.
++ */
++void netback_disconnect_accelerator(int id, const char *eth_name)
++{
++ struct netback_accelerator *accelerator, *next;
++
++ mutex_lock(&accelerators_mutex);
++ list_for_each_entry_safe(accelerator, next, &accelerators_list, link) {
++ if (!strcmp(eth_name, accelerator->eth_name)) {
++ xenbus_for_each_backend
++ (accelerator, netback_accelerator_remove_backend);
++ BUG_ON(atomic_read(&accelerator->use_count) != 0);
++ list_del(&accelerator->link);
++ kfree(accelerator->eth_name);
++ kfree(accelerator);
++ break;
++ }
++ }
++ mutex_unlock(&accelerators_mutex);
++}
++EXPORT_SYMBOL_GPL(netback_disconnect_accelerator);
++
++
++void netback_probe_accelerators(struct backend_info *be,
++ struct xenbus_device *dev)
++{
++ struct netback_accelerator *accelerator;
++
++ /*
++ * Check list of accelerators to see if any is suitable, and
++ * use it if it is.
++ */
++ mutex_lock(&accelerators_mutex);
++ list_for_each_entry(accelerator, &accelerators_list, link) {
++ if (match_accelerator(dev, be, accelerator) &&
++ try_module_get(accelerator->hooks->owner)) {
++ do_probe(be, accelerator, dev);
++ break;
++ }
++ }
++ mutex_unlock(&accelerators_mutex);
++}
++
++
++void netback_remove_accelerators(struct backend_info *be,
++ struct xenbus_device *dev)
++{
++ mutex_lock(&accelerators_mutex);
++ /* Notify the accelerator (if any) of this device's removal */
++ if (be->accelerator != NULL) {
++ be->accelerator->hooks->remove(dev);
++ atomic_dec(&be->accelerator->use_count);
++ module_put(be->accelerator->hooks->owner);
++ be->accelerator = NULL;
++ }
++ mutex_unlock(&accelerators_mutex);
++}
++
++
++void netif_accel_init(void)
++{
++ INIT_LIST_HEAD(&accelerators_list);
++}
+Index: head-2008-11-25/drivers/xen/netback/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netback/common.h 2008-01-07 13:19:18.000000000 +0100
+@@ -0,0 +1,217 @@
++/******************************************************************************
++ * arch/xen/drivers/netif/backend/common.h
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __NETIF__BACKEND__COMMON_H__
++#define __NETIF__BACKEND__COMMON_H__
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/interrupt.h>
++#include <linux/slab.h>
++#include <linux/ip.h>
++#include <linux/in.h>
++#include <linux/netdevice.h>
++#include <linux/etherdevice.h>
++#include <linux/wait.h>
++#include <xen/evtchn.h>
++#include <xen/interface/io/netif.h>
++#include <asm/io.h>
++#include <asm/pgalloc.h>
++#include <xen/interface/grant_table.h>
++#include <xen/gnttab.h>
++#include <xen/driver_util.h>
++#include <xen/xenbus.h>
++
++#define DPRINTK(_f, _a...) \
++ pr_debug("(file=%s, line=%d) " _f, \
++ __FILE__ , __LINE__ , ## _a )
++#define IPRINTK(fmt, args...) \
++ printk(KERN_INFO "xen_net: " fmt, ##args)
++#define WPRINTK(fmt, args...) \
++ printk(KERN_WARNING "xen_net: " fmt, ##args)
++
++typedef struct netif_st {
++ /* Unique identifier for this interface. */
++ domid_t domid;
++ unsigned int handle;
++
++ u8 fe_dev_addr[6];
++
++ /* Physical parameters of the comms window. */
++ grant_handle_t tx_shmem_handle;
++ grant_ref_t tx_shmem_ref;
++ grant_handle_t rx_shmem_handle;
++ grant_ref_t rx_shmem_ref;
++ unsigned int irq;
++
++ /* The shared rings and indexes. */
++ netif_tx_back_ring_t tx;
++ netif_rx_back_ring_t rx;
++ struct vm_struct *tx_comms_area;
++ struct vm_struct *rx_comms_area;
++
++ /* Set of features that can be turned on in dev->features. */
++ int features;
++
++ /* Internal feature information. */
++ u8 can_queue:1; /* can queue packets for receiver? */
++ u8 copying_receiver:1; /* copy packets to receiver? */
++
++ /* Allow netif_be_start_xmit() to peek ahead in the rx request ring. */
++ RING_IDX rx_req_cons_peek;
++
++ /* Transmit shaping: allow 'credit_bytes' every 'credit_usec'. */
++ unsigned long credit_bytes;
++ unsigned long credit_usec;
++ unsigned long remaining_credit;
++ struct timer_list credit_timeout;
++
++ /* Enforce draining of the transmit queue. */
++ struct timer_list tx_queue_timeout;
++
++ /* Miscellaneous private stuff. */
++ struct list_head list; /* scheduling list */
++ atomic_t refcnt;
++ struct net_device *dev;
++ struct net_device_stats stats;
++
++ unsigned int carrier;
++
++ wait_queue_head_t waiting_to_free;
++} netif_t;
++
++/*
++ * Implement our own carrier flag: the network stack's version causes delays
++ * when the carrier is re-enabled (in particular, dev_activate() may not
++ * immediately be called, which can cause packet loss; also the etherbridge
++ * can be rather lazy in activating its port).
++ */
++#define netback_carrier_on(netif) ((netif)->carrier = 1)
++#define netback_carrier_off(netif) ((netif)->carrier = 0)
++#define netback_carrier_ok(netif) ((netif)->carrier)
++
++enum {
++ NETBK_DONT_COPY_SKB,
++ NETBK_DELAYED_COPY_SKB,
++ NETBK_ALWAYS_COPY_SKB,
++};
++
++extern int netbk_copy_skb_mode;
++
++/* Function pointers into netback accelerator plugin modules */
++struct netback_accel_hooks {
++ struct module *owner;
++ int (*probe)(struct xenbus_device *dev);
++ int (*remove)(struct xenbus_device *dev);
++};
++
++/* Structure to track the state of a netback accelerator plugin */
++struct netback_accelerator {
++ struct list_head link;
++ int id;
++ char *eth_name;
++ atomic_t use_count;
++ struct netback_accel_hooks *hooks;
++};
++
++struct backend_info {
++ struct xenbus_device *dev;
++ netif_t *netif;
++ enum xenbus_state frontend_state;
++
++ /* State relating to the netback accelerator */
++ void *netback_accel_priv;
++ /* The accelerator that this backend is currently using */
++ struct netback_accelerator *accelerator;
++};
++
++#define NETBACK_ACCEL_VERSION 0x00010001
++
++/*
++ * Connect an accelerator plugin module to netback. Returns zero on
++ * success, < 0 on error, > 0 (with highest version number supported)
++ * if version mismatch.
++ */
++extern int netback_connect_accelerator(unsigned version,
++ int id, const char *eth_name,
++ struct netback_accel_hooks *hooks);
++/* Disconnect a previously connected accelerator plugin module */
++extern void netback_disconnect_accelerator(int id, const char *eth_name);
++
++
++extern
++void netback_probe_accelerators(struct backend_info *be,
++ struct xenbus_device *dev);
++extern
++void netback_remove_accelerators(struct backend_info *be,
++ struct xenbus_device *dev);
++extern
++void netif_accel_init(void);
++
++
++#define NET_TX_RING_SIZE __RING_SIZE((netif_tx_sring_t *)0, PAGE_SIZE)
++#define NET_RX_RING_SIZE __RING_SIZE((netif_rx_sring_t *)0, PAGE_SIZE)
++
++void netif_disconnect(netif_t *netif);
++
++netif_t *netif_alloc(domid_t domid, unsigned int handle);
++int netif_map(netif_t *netif, unsigned long tx_ring_ref,
++ unsigned long rx_ring_ref, unsigned int evtchn);
++
++#define netif_get(_b) (atomic_inc(&(_b)->refcnt))
++#define netif_put(_b) \
++ do { \
++ if ( atomic_dec_and_test(&(_b)->refcnt) ) \
++ wake_up(&(_b)->waiting_to_free); \
++ } while (0)
++
++void netif_xenbus_init(void);
++
++#define netif_schedulable(netif) \
++ (netif_running((netif)->dev) && netback_carrier_ok(netif))
++
++void netif_schedule_work(netif_t *netif);
++void netif_deschedule_work(netif_t *netif);
++
++int netif_be_start_xmit(struct sk_buff *skb, struct net_device *dev);
++struct net_device_stats *netif_be_get_stats(struct net_device *dev);
++irqreturn_t netif_be_int(int irq, void *dev_id, struct pt_regs *regs);
++
++static inline int netbk_can_queue(struct net_device *dev)
++{
++ netif_t *netif = netdev_priv(dev);
++ return netif->can_queue;
++}
++
++static inline int netbk_can_sg(struct net_device *dev)
++{
++ netif_t *netif = netdev_priv(dev);
++ return netif->features & NETIF_F_SG;
++}
++
++#endif /* __NETIF__BACKEND__COMMON_H__ */
+Index: head-2008-11-25/drivers/xen/netback/interface.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netback/interface.c 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,336 @@
++/******************************************************************************
++ * arch/xen/drivers/netif/backend/interface.c
++ *
++ * Network-device interface management.
++ *
++ * Copyright (c) 2004-2005, Keir Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include "common.h"
++#include <linux/ethtool.h>
++#include <linux/rtnetlink.h>
++
++/*
++ * Module parameter 'queue_length':
++ *
++ * Enables queuing in the network stack when a client has run out of receive
++ * descriptors. Although this feature can improve receive bandwidth by avoiding
++ * packet loss, it can also result in packets sitting in the 'tx_queue' for
++ * unbounded time. This is bad if those packets hold onto foreign resources.
++ * For example, consider a packet that holds onto resources belonging to the
++ * guest for which it is queued (e.g., packet received on vif1.0, destined for
++ * vif1.1 which is not activated in the guest): in this situation the guest
++ * will never be destroyed, unless vif1.1 is taken down. To avoid this, we
++ * run a timer (tx_queue_timeout) to drain the queue when the interface is
++ * blocked.
++ */
++static unsigned long netbk_queue_length = 32;
++module_param_named(queue_length, netbk_queue_length, ulong, 0);
++
++static void __netif_up(netif_t *netif)
++{
++ enable_irq(netif->irq);
++ netif_schedule_work(netif);
++}
++
++static void __netif_down(netif_t *netif)
++{
++ disable_irq(netif->irq);
++ netif_deschedule_work(netif);
++}
++
++static int net_open(struct net_device *dev)
++{
++ netif_t *netif = netdev_priv(dev);
++ if (netback_carrier_ok(netif)) {
++ __netif_up(netif);
++ netif_start_queue(dev);
++ }
++ return 0;
++}
++
++static int net_close(struct net_device *dev)
++{
++ netif_t *netif = netdev_priv(dev);
++ if (netback_carrier_ok(netif))
++ __netif_down(netif);
++ netif_stop_queue(dev);
++ return 0;
++}
++
++static int netbk_change_mtu(struct net_device *dev, int mtu)
++{
++ int max = netbk_can_sg(dev) ? 65535 - ETH_HLEN : ETH_DATA_LEN;
++
++ if (mtu > max)
++ return -EINVAL;
++ dev->mtu = mtu;
++ return 0;
++}
++
++static int netbk_set_sg(struct net_device *dev, u32 data)
++{
++ if (data) {
++ netif_t *netif = netdev_priv(dev);
++
++ if (!(netif->features & NETIF_F_SG))
++ return -ENOSYS;
++ }
++
++ return ethtool_op_set_sg(dev, data);
++}
++
++static int netbk_set_tso(struct net_device *dev, u32 data)
++{
++ if (data) {
++ netif_t *netif = netdev_priv(dev);
++
++ if (!(netif->features & NETIF_F_TSO))
++ return -ENOSYS;
++ }
++
++ return ethtool_op_set_tso(dev, data);
++}
++
++static struct ethtool_ops network_ethtool_ops =
++{
++ .get_tx_csum = ethtool_op_get_tx_csum,
++ .set_tx_csum = ethtool_op_set_tx_csum,
++ .get_sg = ethtool_op_get_sg,
++ .set_sg = netbk_set_sg,
++ .get_tso = ethtool_op_get_tso,
++ .set_tso = netbk_set_tso,
++ .get_link = ethtool_op_get_link,
++};
++
++netif_t *netif_alloc(domid_t domid, unsigned int handle)
++{
++ int err = 0;
++ struct net_device *dev;
++ netif_t *netif;
++ char name[IFNAMSIZ] = {};
++
++ snprintf(name, IFNAMSIZ - 1, "vif%u.%u", domid, handle);
++ dev = alloc_netdev(sizeof(netif_t), name, ether_setup);
++ if (dev == NULL) {
++ DPRINTK("Could not create netif: out of memory\n");
++ return ERR_PTR(-ENOMEM);
++ }
++
++ netif = netdev_priv(dev);
++ memset(netif, 0, sizeof(*netif));
++ netif->domid = domid;
++ netif->handle = handle;
++ atomic_set(&netif->refcnt, 1);
++ init_waitqueue_head(&netif->waiting_to_free);
++ netif->dev = dev;
++
++ netback_carrier_off(netif);
++
++ netif->credit_bytes = netif->remaining_credit = ~0UL;
++ netif->credit_usec = 0UL;
++ init_timer(&netif->credit_timeout);
++ /* Initialize 'expires' now: it's used to track the credit window. */
++ netif->credit_timeout.expires = jiffies;
++
++ init_timer(&netif->tx_queue_timeout);
++
++ dev->hard_start_xmit = netif_be_start_xmit;
++ dev->get_stats = netif_be_get_stats;
++ dev->open = net_open;
++ dev->stop = net_close;
++ dev->change_mtu = netbk_change_mtu;
++ dev->features = NETIF_F_IP_CSUM;
++
++ SET_ETHTOOL_OPS(dev, &network_ethtool_ops);
++
++ dev->tx_queue_len = netbk_queue_length;
++
++ /*
++ * Initialise a dummy MAC address. We choose the numerically
++ * largest non-broadcast address to prevent the address getting
++ * stolen by an Ethernet bridge for STP purposes.
++ * (FE:FF:FF:FF:FF:FF)
++ */
++ memset(dev->dev_addr, 0xFF, ETH_ALEN);
++ dev->dev_addr[0] &= ~0x01;
++
++ rtnl_lock();
++ err = register_netdevice(dev);
++ rtnl_unlock();
++ if (err) {
++ DPRINTK("Could not register new net device %s: err=%d\n",
++ dev->name, err);
++ free_netdev(dev);
++ return ERR_PTR(err);
++ }
++
++ DPRINTK("Successfully created netif\n");
++ return netif;
++}
++
++static int map_frontend_pages(
++ netif_t *netif, grant_ref_t tx_ring_ref, grant_ref_t rx_ring_ref)
++{
++ struct gnttab_map_grant_ref op;
++
++ gnttab_set_map_op(&op, (unsigned long)netif->tx_comms_area->addr,
++ GNTMAP_host_map, tx_ring_ref, netif->domid);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status) {
++ DPRINTK(" Gnttab failure mapping tx_ring_ref!\n");
++ return op.status;
++ }
++
++ netif->tx_shmem_ref = tx_ring_ref;
++ netif->tx_shmem_handle = op.handle;
++
++ gnttab_set_map_op(&op, (unsigned long)netif->rx_comms_area->addr,
++ GNTMAP_host_map, rx_ring_ref, netif->domid);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status) {
++ DPRINTK(" Gnttab failure mapping rx_ring_ref!\n");
++ return op.status;
++ }
++
++ netif->rx_shmem_ref = rx_ring_ref;
++ netif->rx_shmem_handle = op.handle;
++
++ return 0;
++}
++
++static void unmap_frontend_pages(netif_t *netif)
++{
++ struct gnttab_unmap_grant_ref op;
++
++ gnttab_set_unmap_op(&op, (unsigned long)netif->tx_comms_area->addr,
++ GNTMAP_host_map, netif->tx_shmem_handle);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++
++ gnttab_set_unmap_op(&op, (unsigned long)netif->rx_comms_area->addr,
++ GNTMAP_host_map, netif->rx_shmem_handle);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++}
++
++int netif_map(netif_t *netif, unsigned long tx_ring_ref,
++ unsigned long rx_ring_ref, unsigned int evtchn)
++{
++ int err = -ENOMEM;
++ netif_tx_sring_t *txs;
++ netif_rx_sring_t *rxs;
++
++ /* Already connected through? */
++ if (netif->irq)
++ return 0;
++
++ netif->tx_comms_area = alloc_vm_area(PAGE_SIZE);
++ if (netif->tx_comms_area == NULL)
++ return -ENOMEM;
++ netif->rx_comms_area = alloc_vm_area(PAGE_SIZE);
++ if (netif->rx_comms_area == NULL)
++ goto err_rx;
++
++ err = map_frontend_pages(netif, tx_ring_ref, rx_ring_ref);
++ if (err)
++ goto err_map;
++
++ err = bind_interdomain_evtchn_to_irqhandler(
++ netif->domid, evtchn, netif_be_int, 0,
++ netif->dev->name, netif);
++ if (err < 0)
++ goto err_hypervisor;
++ netif->irq = err;
++ disable_irq(netif->irq);
++
++ txs = (netif_tx_sring_t *)netif->tx_comms_area->addr;
++ BACK_RING_INIT(&netif->tx, txs, PAGE_SIZE);
++
++ rxs = (netif_rx_sring_t *)
++ ((char *)netif->rx_comms_area->addr);
++ BACK_RING_INIT(&netif->rx, rxs, PAGE_SIZE);
++
++ netif->rx_req_cons_peek = 0;
++
++ netif_get(netif);
++
++ rtnl_lock();
++ netback_carrier_on(netif);
++ if (netif_running(netif->dev))
++ __netif_up(netif);
++ rtnl_unlock();
++
++ return 0;
++err_hypervisor:
++ unmap_frontend_pages(netif);
++err_map:
++ free_vm_area(netif->rx_comms_area);
++err_rx:
++ free_vm_area(netif->tx_comms_area);
++ return err;
++}
++
++void netif_disconnect(netif_t *netif)
++{
++ if (netback_carrier_ok(netif)) {
++ rtnl_lock();
++ netback_carrier_off(netif);
++ netif_carrier_off(netif->dev); /* discard queued packets */
++ if (netif_running(netif->dev))
++ __netif_down(netif);
++ rtnl_unlock();
++ netif_put(netif);
++ }
++
++ atomic_dec(&netif->refcnt);
++ wait_event(netif->waiting_to_free, atomic_read(&netif->refcnt) == 0);
++
++ del_timer_sync(&netif->credit_timeout);
++ del_timer_sync(&netif->tx_queue_timeout);
++
++ if (netif->irq)
++ unbind_from_irqhandler(netif->irq, netif);
++
++ unregister_netdev(netif->dev);
++
++ if (netif->tx.sring) {
++ unmap_frontend_pages(netif);
++ free_vm_area(netif->tx_comms_area);
++ free_vm_area(netif->rx_comms_area);
++ }
++
++ free_netdev(netif->dev);
++}
+Index: head-2008-11-25/drivers/xen/netback/loopback.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netback/loopback.c 2007-08-06 15:10:49.000000000 +0200
+@@ -0,0 +1,324 @@
++/******************************************************************************
++ * netback/loopback.c
++ *
++ * A two-interface loopback device to emulate a local netfront-netback
++ * connection. This ensures that local packet delivery looks identical
++ * to inter-domain delivery. Most importantly, packets delivered locally
++ * originating from other domains will get *copied* when they traverse this
++ * driver. This prevents unbounded delays in socket-buffer queues from
++ * causing the netback driver to "seize up".
++ *
++ * This driver creates a symmetric pair of loopback interfaces with names
++ * vif0.0 and veth0. The intention is that 'vif0.0' is bound to an Ethernet
++ * bridge, just like a proper netback interface, while a local IP interface
++ * is configured on 'veth0'.
++ *
++ * As with a real netback interface, vif0.0 is configured with a suitable
++ * dummy MAC address. No default is provided for veth0: a reasonable strategy
++ * is to transfer eth0's MAC address to veth0, and give eth0 a dummy address
++ * (to avoid confusing the Etherbridge).
++ *
++ * Copyright (c) 2005 K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/module.h>
++#include <linux/netdevice.h>
++#include <linux/inetdevice.h>
++#include <linux/etherdevice.h>
++#include <linux/skbuff.h>
++#include <linux/ethtool.h>
++#include <net/dst.h>
++#include <net/xfrm.h> /* secpath_reset() */
++#include <asm/hypervisor.h> /* is_initial_xendomain() */
++
++static int nloopbacks = -1;
++module_param(nloopbacks, int, 0);
++MODULE_PARM_DESC(nloopbacks, "Number of netback-loopback devices to create");
++
++struct net_private {
++ struct net_device *loopback_dev;
++ struct net_device_stats stats;
++};
++
++static int loopback_open(struct net_device *dev)
++{
++ struct net_private *np = netdev_priv(dev);
++ memset(&np->stats, 0, sizeof(np->stats));
++ netif_start_queue(dev);
++ return 0;
++}
++
++static int loopback_close(struct net_device *dev)
++{
++ netif_stop_queue(dev);
++ return 0;
++}
++
++#ifdef CONFIG_X86
++static int is_foreign(unsigned long pfn)
++{
++ /* NB. Play it safe for auto-translation mode. */
++ return (xen_feature(XENFEAT_auto_translated_physmap) ||
++ (phys_to_machine_mapping[pfn] & FOREIGN_FRAME_BIT));
++}
++#else
++/* How to detect a foreign mapping? Play it safe. */
++#define is_foreign(pfn) (1)
++#endif
++
++static int skb_remove_foreign_references(struct sk_buff *skb)
++{
++ struct page *page;
++ unsigned long pfn;
++ int i, off;
++ char *vaddr;
++
++ BUG_ON(skb_shinfo(skb)->frag_list);
++
++ if (skb_cloned(skb) &&
++ unlikely(pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
++ return 0;
++
++ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
++ pfn = page_to_pfn(skb_shinfo(skb)->frags[i].page);
++ if (!is_foreign(pfn))
++ continue;
++
++ page = alloc_page(GFP_ATOMIC | __GFP_NOWARN);
++ if (unlikely(!page))
++ return 0;
++
++ vaddr = kmap_skb_frag(&skb_shinfo(skb)->frags[i]);
++ off = skb_shinfo(skb)->frags[i].page_offset;
++ memcpy(page_address(page) + off,
++ vaddr + off,
++ skb_shinfo(skb)->frags[i].size);
++ kunmap_skb_frag(vaddr);
++
++ put_page(skb_shinfo(skb)->frags[i].page);
++ skb_shinfo(skb)->frags[i].page = page;
++ }
++
++ return 1;
++}
++
++static int loopback_start_xmit(struct sk_buff *skb, struct net_device *dev)
++{
++ struct net_private *np = netdev_priv(dev);
++
++ if (!skb_remove_foreign_references(skb)) {
++ np->stats.tx_dropped++;
++ dev_kfree_skb(skb);
++ return 0;
++ }
++
++ dst_release(skb->dst);
++ skb->dst = NULL;
++
++ skb_orphan(skb);
++
++ np->stats.tx_bytes += skb->len;
++ np->stats.tx_packets++;
++
++ /* Switch to loopback context. */
++ dev = np->loopback_dev;
++ np = netdev_priv(dev);
++
++ np->stats.rx_bytes += skb->len;
++ np->stats.rx_packets++;
++
++ if (skb->ip_summed == CHECKSUM_HW) {
++ /* Defer checksum calculation. */
++ skb->proto_csum_blank = 1;
++ /* Must be a local packet: assert its integrity. */
++ skb->proto_data_valid = 1;
++ }
++
++ skb->ip_summed = skb->proto_data_valid ?
++ CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
++
++ skb->pkt_type = PACKET_HOST; /* overridden by eth_type_trans() */
++ skb->protocol = eth_type_trans(skb, dev);
++ skb->dev = dev;
++ dev->last_rx = jiffies;
++
++ /* Flush netfilter context: rx'ed skbuffs not expected to have any. */
++ nf_reset(skb);
++ secpath_reset(skb);
++
++ netif_rx(skb);
++
++ return 0;
++}
++
++static struct net_device_stats *loopback_get_stats(struct net_device *dev)
++{
++ struct net_private *np = netdev_priv(dev);
++ return &np->stats;
++}
++
++static struct ethtool_ops network_ethtool_ops =
++{
++ .get_tx_csum = ethtool_op_get_tx_csum,
++ .set_tx_csum = ethtool_op_set_tx_csum,
++ .get_sg = ethtool_op_get_sg,
++ .set_sg = ethtool_op_set_sg,
++ .get_tso = ethtool_op_get_tso,
++ .set_tso = ethtool_op_set_tso,
++ .get_link = ethtool_op_get_link,
++};
++
++/*
++ * Nothing to do here. Virtual interface is point-to-point and the
++ * physical interface is probably promiscuous anyway.
++ */
++static void loopback_set_multicast_list(struct net_device *dev)
++{
++}
++
++static void loopback_construct(struct net_device *dev, struct net_device *lo)
++{
++ struct net_private *np = netdev_priv(dev);
++
++ np->loopback_dev = lo;
++
++ dev->open = loopback_open;
++ dev->stop = loopback_close;
++ dev->hard_start_xmit = loopback_start_xmit;
++ dev->get_stats = loopback_get_stats;
++ dev->set_multicast_list = loopback_set_multicast_list;
++ dev->change_mtu = NULL; /* allow arbitrary mtu */
++
++ dev->tx_queue_len = 0;
++
++ dev->features = (NETIF_F_HIGHDMA |
++ NETIF_F_LLTX |
++ NETIF_F_TSO |
++ NETIF_F_SG |
++ NETIF_F_IP_CSUM);
++
++ SET_ETHTOOL_OPS(dev, &network_ethtool_ops);
++
++ /*
++ * We do not set a jumbo MTU on the interface. Otherwise the network
++ * stack will try to send large packets that will get dropped by the
++ * Ethernet bridge (unless the physical Ethernet interface is
++ * configured to transfer jumbo packets). If a larger MTU is desired
++ * then the system administrator can specify it using the 'ifconfig'
++ * command.
++ */
++ /*dev->mtu = 16*1024;*/
++}
++
++static int __init make_loopback(int i)
++{
++ struct net_device *dev1, *dev2;
++ char dev_name[IFNAMSIZ];
++ int err = -ENOMEM;
++
++ sprintf(dev_name, "vif0.%d", i);
++ dev1 = alloc_netdev(sizeof(struct net_private), dev_name, ether_setup);
++ if (!dev1)
++ return err;
++
++ sprintf(dev_name, "veth%d", i);
++ dev2 = alloc_netdev(sizeof(struct net_private), dev_name, ether_setup);
++ if (!dev2)
++ goto fail_netdev2;
++
++ loopback_construct(dev1, dev2);
++ loopback_construct(dev2, dev1);
++
++ /*
++ * Initialise a dummy MAC address for the 'dummy backend' interface. We
++ * choose the numerically largest non-broadcast address to prevent the
++ * address getting stolen by an Ethernet bridge for STP purposes.
++ */
++ memset(dev1->dev_addr, 0xFF, ETH_ALEN);
++ dev1->dev_addr[0] &= ~0x01;
++
++ if ((err = register_netdev(dev1)) != 0)
++ goto fail;
++
++ if ((err = register_netdev(dev2)) != 0) {
++ unregister_netdev(dev1);
++ goto fail;
++ }
++
++ return 0;
++
++ fail:
++ free_netdev(dev2);
++ fail_netdev2:
++ free_netdev(dev1);
++ return err;
++}
++
++static void __exit clean_loopback(int i)
++{
++ struct net_device *dev1, *dev2;
++ char dev_name[IFNAMSIZ];
++
++ sprintf(dev_name, "vif0.%d", i);
++ dev1 = dev_get_by_name(dev_name);
++ sprintf(dev_name, "veth%d", i);
++ dev2 = dev_get_by_name(dev_name);
++ if (dev1 && dev2) {
++ unregister_netdev(dev2);
++ unregister_netdev(dev1);
++ free_netdev(dev2);
++ free_netdev(dev1);
++ }
++}
++
++static int __init loopback_init(void)
++{
++ int i, err = 0;
++
++ if (nloopbacks == -1)
++ nloopbacks = is_initial_xendomain() ? 4 : 0;
++
++ for (i = 0; i < nloopbacks; i++)
++ if ((err = make_loopback(i)) != 0)
++ break;
++
++ return err;
++}
++
++module_init(loopback_init);
++
++static void __exit loopback_exit(void)
++{
++ int i;
++
++ for (i = nloopbacks; i-- > 0; )
++ clean_loopback(i);
++}
++
++module_exit(loopback_exit);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/netback/netback.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netback/netback.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,1614 @@
++/******************************************************************************
++ * drivers/xen/netback/netback.c
++ *
++ * Back-end of the driver for virtual network devices. This portion of the
++ * driver exports a 'unified' network-device interface that can be accessed
++ * by any operating system that implements a compatible front end. A
++ * reference front-end implementation can be found in:
++ * drivers/xen/netfront/netfront.c
++ *
++ * Copyright (c) 2002-2005, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include "common.h"
++#include <xen/balloon.h>
++#include <xen/interface/memory.h>
++
++/*define NETBE_DEBUG_INTERRUPT*/
++
++/* extra field used in struct page */
++#define netif_page_index(pg) (*(long *)&(pg)->mapping)
++
++struct netbk_rx_meta {
++ skb_frag_t frag;
++ int id;
++ u8 copy:1;
++};
++
++struct netbk_tx_pending_inuse {
++ struct list_head list;
++ unsigned long alloc_time;
++};
++
++static void netif_idx_release(u16 pending_idx);
++static void netif_page_release(struct page *page);
++static void make_tx_response(netif_t *netif,
++ netif_tx_request_t *txp,
++ s8 st);
++static netif_rx_response_t *make_rx_response(netif_t *netif,
++ u16 id,
++ s8 st,
++ u16 offset,
++ u16 size,
++ u16 flags);
++
++static void net_tx_action(unsigned long unused);
++static DECLARE_TASKLET(net_tx_tasklet, net_tx_action, 0);
++
++static void net_rx_action(unsigned long unused);
++static DECLARE_TASKLET(net_rx_tasklet, net_rx_action, 0);
++
++static struct timer_list net_timer;
++static struct timer_list netbk_tx_pending_timer;
++
++#define MAX_PENDING_REQS 256
++
++static struct sk_buff_head rx_queue;
++
++static struct page **mmap_pages;
++static inline unsigned long idx_to_pfn(unsigned int idx)
++{
++ return page_to_pfn(mmap_pages[idx]);
++}
++
++static inline unsigned long idx_to_kaddr(unsigned int idx)
++{
++ return (unsigned long)pfn_to_kaddr(idx_to_pfn(idx));
++}
++
++#define PKT_PROT_LEN 64
++
++static struct pending_tx_info {
++ netif_tx_request_t req;
++ netif_t *netif;
++} pending_tx_info[MAX_PENDING_REQS];
++static u16 pending_ring[MAX_PENDING_REQS];
++typedef unsigned int PEND_RING_IDX;
++#define MASK_PEND_IDX(_i) ((_i)&(MAX_PENDING_REQS-1))
++static PEND_RING_IDX pending_prod, pending_cons;
++#define NR_PENDING_REQS (MAX_PENDING_REQS - pending_prod + pending_cons)
++
++/* Freed TX SKBs get batched on this ring before return to pending_ring. */
++static u16 dealloc_ring[MAX_PENDING_REQS];
++static PEND_RING_IDX dealloc_prod, dealloc_cons;
++
++/* Doubly-linked list of in-use pending entries. */
++static struct netbk_tx_pending_inuse pending_inuse[MAX_PENDING_REQS];
++static LIST_HEAD(pending_inuse_head);
++
++static struct sk_buff_head tx_queue;
++
++static grant_handle_t grant_tx_handle[MAX_PENDING_REQS];
++static gnttab_unmap_grant_ref_t tx_unmap_ops[MAX_PENDING_REQS];
++static gnttab_map_grant_ref_t tx_map_ops[MAX_PENDING_REQS];
++
++static struct list_head net_schedule_list;
++static spinlock_t net_schedule_list_lock;
++
++#define MAX_MFN_ALLOC 64
++static unsigned long mfn_list[MAX_MFN_ALLOC];
++static unsigned int alloc_index = 0;
++
++/* Setting this allows the safe use of this driver without netloop. */
++static int MODPARM_copy_skb = 1;
++module_param_named(copy_skb, MODPARM_copy_skb, bool, 0);
++MODULE_PARM_DESC(copy_skb, "Copy data received from netfront without netloop");
++
++int netbk_copy_skb_mode;
++
++static inline unsigned long alloc_mfn(void)
++{
++ BUG_ON(alloc_index == 0);
++ return mfn_list[--alloc_index];
++}
++
++static int check_mfn(int nr)
++{
++ struct xen_memory_reservation reservation = {
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ };
++ int rc;
++
++ if (likely(alloc_index >= nr))
++ return 0;
++
++ set_xen_guest_handle(reservation.extent_start, mfn_list + alloc_index);
++ reservation.nr_extents = MAX_MFN_ALLOC - alloc_index;
++ rc = HYPERVISOR_memory_op(XENMEM_increase_reservation, &reservation);
++ if (likely(rc > 0))
++ alloc_index += rc;
++
++ return alloc_index >= nr ? 0 : -ENOMEM;
++}
++
++static inline void maybe_schedule_tx_action(void)
++{
++ smp_mb();
++ if ((NR_PENDING_REQS < (MAX_PENDING_REQS/2)) &&
++ !list_empty(&net_schedule_list))
++ tasklet_schedule(&net_tx_tasklet);
++}
++
++static struct sk_buff *netbk_copy_skb(struct sk_buff *skb)
++{
++ struct skb_shared_info *ninfo;
++ struct sk_buff *nskb;
++ unsigned long offset;
++ int ret;
++ int len;
++ int headlen;
++
++ BUG_ON(skb_shinfo(skb)->frag_list != NULL);
++
++ nskb = alloc_skb(SKB_MAX_HEAD(0), GFP_ATOMIC | __GFP_NOWARN);
++ if (unlikely(!nskb))
++ goto err;
++
++ skb_reserve(nskb, 16 + NET_IP_ALIGN);
++ headlen = nskb->end - nskb->data;
++ if (headlen > skb_headlen(skb))
++ headlen = skb_headlen(skb);
++ ret = skb_copy_bits(skb, 0, __skb_put(nskb, headlen), headlen);
++ BUG_ON(ret);
++
++ ninfo = skb_shinfo(nskb);
++ ninfo->gso_size = skb_shinfo(skb)->gso_size;
++ ninfo->gso_type = skb_shinfo(skb)->gso_type;
++
++ offset = headlen;
++ len = skb->len - headlen;
++
++ nskb->len = skb->len;
++ nskb->data_len = len;
++ nskb->truesize += len;
++
++ while (len) {
++ struct page *page;
++ int copy;
++ int zero;
++
++ if (unlikely(ninfo->nr_frags >= MAX_SKB_FRAGS)) {
++ dump_stack();
++ goto err_free;
++ }
++
++ copy = len >= PAGE_SIZE ? PAGE_SIZE : len;
++ zero = len >= PAGE_SIZE ? 0 : __GFP_ZERO;
++
++ page = alloc_page(GFP_ATOMIC | __GFP_NOWARN | zero);
++ if (unlikely(!page))
++ goto err_free;
++
++ ret = skb_copy_bits(skb, offset, page_address(page), copy);
++ BUG_ON(ret);
++
++ ninfo->frags[ninfo->nr_frags].page = page;
++ ninfo->frags[ninfo->nr_frags].page_offset = 0;
++ ninfo->frags[ninfo->nr_frags].size = copy;
++ ninfo->nr_frags++;
++
++ offset += copy;
++ len -= copy;
++ }
++
++ offset = nskb->data - skb->data;
++
++ nskb->h.raw = skb->h.raw + offset;
++ nskb->nh.raw = skb->nh.raw + offset;
++ nskb->mac.raw = skb->mac.raw + offset;
++
++ return nskb;
++
++ err_free:
++ kfree_skb(nskb);
++ err:
++ return NULL;
++}
++
++static inline int netbk_max_required_rx_slots(netif_t *netif)
++{
++ if (netif->features & (NETIF_F_SG|NETIF_F_TSO))
++ return MAX_SKB_FRAGS + 2; /* header + extra_info + frags */
++ return 1; /* all in one */
++}
++
++static inline int netbk_queue_full(netif_t *netif)
++{
++ RING_IDX peek = netif->rx_req_cons_peek;
++ RING_IDX needed = netbk_max_required_rx_slots(netif);
++
++ return ((netif->rx.sring->req_prod - peek) < needed) ||
++ ((netif->rx.rsp_prod_pvt + NET_RX_RING_SIZE - peek) < needed);
++}
++
++static void tx_queue_callback(unsigned long data)
++{
++ netif_t *netif = (netif_t *)data;
++ if (netif_schedulable(netif))
++ netif_wake_queue(netif->dev);
++}
++
++int netif_be_start_xmit(struct sk_buff *skb, struct net_device *dev)
++{
++ netif_t *netif = netdev_priv(dev);
++
++ BUG_ON(skb->dev != dev);
++
++ /* Drop the packet if the target domain has no receive buffers. */
++ if (unlikely(!netif_schedulable(netif) || netbk_queue_full(netif)))
++ goto drop;
++
++ /*
++ * Copy the packet here if it's destined for a flipping interface
++ * but isn't flippable (e.g. extra references to data).
++ * XXX For now we also copy skbuffs whose head crosses a page
++ * boundary, because netbk_gop_skb can't handle them.
++ */
++ if (!netif->copying_receiver ||
++ ((skb_headlen(skb) + offset_in_page(skb->data)) >= PAGE_SIZE)) {
++ struct sk_buff *nskb = netbk_copy_skb(skb);
++ if ( unlikely(nskb == NULL) )
++ goto drop;
++ /* Copy only the header fields we use in this driver. */
++ nskb->dev = skb->dev;
++ nskb->ip_summed = skb->ip_summed;
++ nskb->proto_data_valid = skb->proto_data_valid;
++ dev_kfree_skb(skb);
++ skb = nskb;
++ }
++
++ netif->rx_req_cons_peek += skb_shinfo(skb)->nr_frags + 1 +
++ !!skb_shinfo(skb)->gso_size;
++ netif_get(netif);
++
++ if (netbk_can_queue(dev) && netbk_queue_full(netif)) {
++ netif->rx.sring->req_event = netif->rx_req_cons_peek +
++ netbk_max_required_rx_slots(netif);
++ mb(); /* request notification /then/ check & stop the queue */
++ if (netbk_queue_full(netif)) {
++ netif_stop_queue(dev);
++ /*
++ * Schedule 500ms timeout to restart the queue, thus
++ * ensuring that an inactive queue will be drained.
++ * Packets will be immediately be dropped until more
++ * receive buffers become available (see
++ * netbk_queue_full() check above).
++ */
++ netif->tx_queue_timeout.data = (unsigned long)netif;
++ netif->tx_queue_timeout.function = tx_queue_callback;
++ __mod_timer(&netif->tx_queue_timeout, jiffies + HZ/2);
++ }
++ }
++
++ skb_queue_tail(&rx_queue, skb);
++ tasklet_schedule(&net_rx_tasklet);
++
++ return 0;
++
++ drop:
++ netif->stats.tx_dropped++;
++ dev_kfree_skb(skb);
++ return 0;
++}
++
++#if 0
++static void xen_network_done_notify(void)
++{
++ static struct net_device *eth0_dev = NULL;
++ if (unlikely(eth0_dev == NULL))
++ eth0_dev = __dev_get_by_name("eth0");
++ netif_rx_schedule(eth0_dev);
++}
++/*
++ * Add following to poll() function in NAPI driver (Tigon3 is example):
++ * if ( xen_network_done() )
++ * tg3_enable_ints(tp);
++ */
++int xen_network_done(void)
++{
++ return skb_queue_empty(&rx_queue);
++}
++#endif
++
++struct netrx_pending_operations {
++ unsigned trans_prod, trans_cons;
++ unsigned mmu_prod, mmu_mcl;
++ unsigned mcl_prod, mcl_cons;
++ unsigned copy_prod, copy_cons;
++ unsigned meta_prod, meta_cons;
++ mmu_update_t *mmu;
++ gnttab_transfer_t *trans;
++ gnttab_copy_t *copy;
++ multicall_entry_t *mcl;
++ struct netbk_rx_meta *meta;
++};
++
++/* Set up the grant operations for this fragment. If it's a flipping
++ interface, we also set up the unmap request from here. */
++static u16 netbk_gop_frag(netif_t *netif, struct netbk_rx_meta *meta,
++ int i, struct netrx_pending_operations *npo,
++ struct page *page, unsigned long size,
++ unsigned long offset)
++{
++ mmu_update_t *mmu;
++ gnttab_transfer_t *gop;
++ gnttab_copy_t *copy_gop;
++ multicall_entry_t *mcl;
++ netif_rx_request_t *req;
++ unsigned long old_mfn, new_mfn;
++
++ old_mfn = virt_to_mfn(page_address(page));
++
++ req = RING_GET_REQUEST(&netif->rx, netif->rx.req_cons + i);
++ if (netif->copying_receiver) {
++ /* The fragment needs to be copied rather than
++ flipped. */
++ meta->copy = 1;
++ copy_gop = npo->copy + npo->copy_prod++;
++ copy_gop->flags = GNTCOPY_dest_gref;
++ if (PageForeign(page)) {
++ struct pending_tx_info *src_pend =
++ &pending_tx_info[netif_page_index(page)];
++ copy_gop->source.domid = src_pend->netif->domid;
++ copy_gop->source.u.ref = src_pend->req.gref;
++ copy_gop->flags |= GNTCOPY_source_gref;
++ } else {
++ copy_gop->source.domid = DOMID_SELF;
++ copy_gop->source.u.gmfn = old_mfn;
++ }
++ copy_gop->source.offset = offset;
++ copy_gop->dest.domid = netif->domid;
++ copy_gop->dest.offset = 0;
++ copy_gop->dest.u.ref = req->gref;
++ copy_gop->len = size;
++ } else {
++ meta->copy = 0;
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ new_mfn = alloc_mfn();
++
++ /*
++ * Set the new P2M table entry before
++ * reassigning the old data page. Heed the
++ * comment in pgtable-2level.h:pte_page(). :-)
++ */
++ set_phys_to_machine(page_to_pfn(page), new_mfn);
++
++ mcl = npo->mcl + npo->mcl_prod++;
++ MULTI_update_va_mapping(mcl,
++ (unsigned long)page_address(page),
++ pfn_pte_ma(new_mfn, PAGE_KERNEL),
++ 0);
++
++ mmu = npo->mmu + npo->mmu_prod++;
++ mmu->ptr = ((maddr_t)new_mfn << PAGE_SHIFT) |
++ MMU_MACHPHYS_UPDATE;
++ mmu->val = page_to_pfn(page);
++ }
++
++ gop = npo->trans + npo->trans_prod++;
++ gop->mfn = old_mfn;
++ gop->domid = netif->domid;
++ gop->ref = req->gref;
++ }
++ return req->id;
++}
++
++static void netbk_gop_skb(struct sk_buff *skb,
++ struct netrx_pending_operations *npo)
++{
++ netif_t *netif = netdev_priv(skb->dev);
++ int nr_frags = skb_shinfo(skb)->nr_frags;
++ int i;
++ int extra;
++ struct netbk_rx_meta *head_meta, *meta;
++
++ head_meta = npo->meta + npo->meta_prod++;
++ head_meta->frag.page_offset = skb_shinfo(skb)->gso_type;
++ head_meta->frag.size = skb_shinfo(skb)->gso_size;
++ extra = !!head_meta->frag.size + 1;
++
++ for (i = 0; i < nr_frags; i++) {
++ meta = npo->meta + npo->meta_prod++;
++ meta->frag = skb_shinfo(skb)->frags[i];
++ meta->id = netbk_gop_frag(netif, meta, i + extra, npo,
++ meta->frag.page,
++ meta->frag.size,
++ meta->frag.page_offset);
++ }
++
++ /*
++ * This must occur at the end to ensure that we don't trash skb_shinfo
++ * until we're done. We know that the head doesn't cross a page
++ * boundary because such packets get copied in netif_be_start_xmit.
++ */
++ head_meta->id = netbk_gop_frag(netif, head_meta, 0, npo,
++ virt_to_page(skb->data),
++ skb_headlen(skb),
++ offset_in_page(skb->data));
++
++ netif->rx.req_cons += nr_frags + extra;
++}
++
++static inline void netbk_free_pages(int nr_frags, struct netbk_rx_meta *meta)
++{
++ int i;
++
++ for (i = 0; i < nr_frags; i++)
++ put_page(meta[i].frag.page);
++}
++
++/* This is a twin to netbk_gop_skb. Assume that netbk_gop_skb was
++ used to set up the operations on the top of
++ netrx_pending_operations, which have since been done. Check that
++ they didn't give any errors and advance over them. */
++static int netbk_check_gop(int nr_frags, domid_t domid,
++ struct netrx_pending_operations *npo)
++{
++ multicall_entry_t *mcl;
++ gnttab_transfer_t *gop;
++ gnttab_copy_t *copy_op;
++ int status = NETIF_RSP_OKAY;
++ int i;
++
++ for (i = 0; i <= nr_frags; i++) {
++ if (npo->meta[npo->meta_cons + i].copy) {
++ copy_op = npo->copy + npo->copy_cons++;
++ if (copy_op->status != GNTST_okay) {
++ DPRINTK("Bad status %d from copy to DOM%d.\n",
++ copy_op->status, domid);
++ status = NETIF_RSP_ERROR;
++ }
++ } else {
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ mcl = npo->mcl + npo->mcl_cons++;
++ /* The update_va_mapping() must not fail. */
++ BUG_ON(mcl->result != 0);
++ }
++
++ gop = npo->trans + npo->trans_cons++;
++ /* Check the reassignment error code. */
++ if (gop->status != 0) {
++ DPRINTK("Bad status %d from grant transfer to DOM%u\n",
++ gop->status, domid);
++ /*
++ * Page no longer belongs to us unless
++ * GNTST_bad_page, but that should be
++ * a fatal error anyway.
++ */
++ BUG_ON(gop->status == GNTST_bad_page);
++ status = NETIF_RSP_ERROR;
++ }
++ }
++ }
++
++ return status;
++}
++
++static void netbk_add_frag_responses(netif_t *netif, int status,
++ struct netbk_rx_meta *meta, int nr_frags)
++{
++ int i;
++ unsigned long offset;
++
++ for (i = 0; i < nr_frags; i++) {
++ int id = meta[i].id;
++ int flags = (i == nr_frags - 1) ? 0 : NETRXF_more_data;
++
++ if (meta[i].copy)
++ offset = 0;
++ else
++ offset = meta[i].frag.page_offset;
++ make_rx_response(netif, id, status, offset,
++ meta[i].frag.size, flags);
++ }
++}
++
++static void net_rx_action(unsigned long unused)
++{
++ netif_t *netif = NULL;
++ s8 status;
++ u16 id, irq, flags;
++ netif_rx_response_t *resp;
++ multicall_entry_t *mcl;
++ struct sk_buff_head rxq;
++ struct sk_buff *skb;
++ int notify_nr = 0;
++ int ret;
++ int nr_frags;
++ int count;
++ unsigned long offset;
++
++ /*
++ * Putting hundreds of bytes on the stack is considered rude.
++ * Static works because a tasklet can only be on one CPU at any time.
++ */
++ static multicall_entry_t rx_mcl[NET_RX_RING_SIZE+3];
++ static mmu_update_t rx_mmu[NET_RX_RING_SIZE];
++ static gnttab_transfer_t grant_trans_op[NET_RX_RING_SIZE];
++ static gnttab_copy_t grant_copy_op[NET_RX_RING_SIZE];
++ static unsigned char rx_notify[NR_IRQS];
++ static u16 notify_list[NET_RX_RING_SIZE];
++ static struct netbk_rx_meta meta[NET_RX_RING_SIZE];
++
++ struct netrx_pending_operations npo = {
++ mmu: rx_mmu,
++ trans: grant_trans_op,
++ copy: grant_copy_op,
++ mcl: rx_mcl,
++ meta: meta};
++
++ skb_queue_head_init(&rxq);
++
++ count = 0;
++
++ while ((skb = skb_dequeue(&rx_queue)) != NULL) {
++ nr_frags = skb_shinfo(skb)->nr_frags;
++ *(int *)skb->cb = nr_frags;
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap) &&
++ !((netif_t *)netdev_priv(skb->dev))->copying_receiver &&
++ check_mfn(nr_frags + 1)) {
++ /* Memory squeeze? Back off for an arbitrary while. */
++ if ( net_ratelimit() )
++ WPRINTK("Memory squeeze in netback "
++ "driver.\n");
++ mod_timer(&net_timer, jiffies + HZ);
++ skb_queue_head(&rx_queue, skb);
++ break;
++ }
++
++ netbk_gop_skb(skb, &npo);
++
++ count += nr_frags + 1;
++
++ __skb_queue_tail(&rxq, skb);
++
++ /* Filled the batch queue? */
++ if (count + MAX_SKB_FRAGS >= NET_RX_RING_SIZE)
++ break;
++ }
++
++ BUG_ON(npo.meta_prod > ARRAY_SIZE(meta));
++
++ npo.mmu_mcl = npo.mcl_prod;
++ if (npo.mcl_prod) {
++ BUG_ON(xen_feature(XENFEAT_auto_translated_physmap));
++ BUG_ON(npo.mmu_prod > ARRAY_SIZE(rx_mmu));
++ mcl = npo.mcl + npo.mcl_prod++;
++
++ BUG_ON(mcl[-1].op != __HYPERVISOR_update_va_mapping);
++ mcl[-1].args[MULTI_UVMFLAGS_INDEX] = UVMF_TLB_FLUSH|UVMF_ALL;
++
++ mcl->op = __HYPERVISOR_mmu_update;
++ mcl->args[0] = (unsigned long)rx_mmu;
++ mcl->args[1] = npo.mmu_prod;
++ mcl->args[2] = 0;
++ mcl->args[3] = DOMID_SELF;
++ }
++
++ if (npo.trans_prod) {
++ BUG_ON(npo.trans_prod > ARRAY_SIZE(grant_trans_op));
++ mcl = npo.mcl + npo.mcl_prod++;
++ mcl->op = __HYPERVISOR_grant_table_op;
++ mcl->args[0] = GNTTABOP_transfer;
++ mcl->args[1] = (unsigned long)grant_trans_op;
++ mcl->args[2] = npo.trans_prod;
++ }
++
++ if (npo.copy_prod) {
++ BUG_ON(npo.copy_prod > ARRAY_SIZE(grant_copy_op));
++ mcl = npo.mcl + npo.mcl_prod++;
++ mcl->op = __HYPERVISOR_grant_table_op;
++ mcl->args[0] = GNTTABOP_copy;
++ mcl->args[1] = (unsigned long)grant_copy_op;
++ mcl->args[2] = npo.copy_prod;
++ }
++
++ /* Nothing to do? */
++ if (!npo.mcl_prod)
++ return;
++
++ BUG_ON(npo.mcl_prod > ARRAY_SIZE(rx_mcl));
++
++ ret = HYPERVISOR_multicall(npo.mcl, npo.mcl_prod);
++ BUG_ON(ret != 0);
++ /* The mmu_machphys_update() must not fail. */
++ BUG_ON(npo.mmu_mcl && npo.mcl[npo.mmu_mcl].result != 0);
++
++ while ((skb = __skb_dequeue(&rxq)) != NULL) {
++ nr_frags = *(int *)skb->cb;
++
++ netif = netdev_priv(skb->dev);
++ /* We can't rely on skb_release_data to release the
++ pages used by fragments for us, since it tries to
++ touch the pages in the fraglist. If we're in
++ flipping mode, that doesn't work. In copying mode,
++ we still have access to all of the pages, and so
++ it's safe to let release_data deal with it. */
++ /* (Freeing the fragments is safe since we copy
++ non-linear skbs destined for flipping interfaces) */
++ if (!netif->copying_receiver) {
++ atomic_set(&(skb_shinfo(skb)->dataref), 1);
++ skb_shinfo(skb)->frag_list = NULL;
++ skb_shinfo(skb)->nr_frags = 0;
++ netbk_free_pages(nr_frags, meta + npo.meta_cons + 1);
++ }
++
++ netif->stats.tx_bytes += skb->len;
++ netif->stats.tx_packets++;
++
++ status = netbk_check_gop(nr_frags, netif->domid, &npo);
++
++ id = meta[npo.meta_cons].id;
++ flags = nr_frags ? NETRXF_more_data : 0;
++
++ if (skb->ip_summed == CHECKSUM_HW) /* local packet? */
++ flags |= NETRXF_csum_blank | NETRXF_data_validated;
++ else if (skb->proto_data_valid) /* remote but checksummed? */
++ flags |= NETRXF_data_validated;
++
++ if (meta[npo.meta_cons].copy)
++ offset = 0;
++ else
++ offset = offset_in_page(skb->data);
++ resp = make_rx_response(netif, id, status, offset,
++ skb_headlen(skb), flags);
++
++ if (meta[npo.meta_cons].frag.size) {
++ struct netif_extra_info *gso =
++ (struct netif_extra_info *)
++ RING_GET_RESPONSE(&netif->rx,
++ netif->rx.rsp_prod_pvt++);
++
++ resp->flags |= NETRXF_extra_info;
++
++ gso->u.gso.size = meta[npo.meta_cons].frag.size;
++ gso->u.gso.type = XEN_NETIF_GSO_TYPE_TCPV4;
++ gso->u.gso.pad = 0;
++ gso->u.gso.features = 0;
++
++ gso->type = XEN_NETIF_EXTRA_TYPE_GSO;
++ gso->flags = 0;
++ }
++
++ netbk_add_frag_responses(netif, status,
++ meta + npo.meta_cons + 1,
++ nr_frags);
++
++ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netif->rx, ret);
++ irq = netif->irq;
++ if (ret && !rx_notify[irq]) {
++ rx_notify[irq] = 1;
++ notify_list[notify_nr++] = irq;
++ }
++
++ if (netif_queue_stopped(netif->dev) &&
++ netif_schedulable(netif) &&
++ !netbk_queue_full(netif))
++ netif_wake_queue(netif->dev);
++
++ netif_put(netif);
++ dev_kfree_skb(skb);
++ npo.meta_cons += nr_frags + 1;
++ }
++
++ while (notify_nr != 0) {
++ irq = notify_list[--notify_nr];
++ rx_notify[irq] = 0;
++ notify_remote_via_irq(irq);
++ }
++
++ /* More work to do? */
++ if (!skb_queue_empty(&rx_queue) && !timer_pending(&net_timer))
++ tasklet_schedule(&net_rx_tasklet);
++#if 0
++ else
++ xen_network_done_notify();
++#endif
++}
++
++static void net_alarm(unsigned long unused)
++{
++ tasklet_schedule(&net_rx_tasklet);
++}
++
++static void netbk_tx_pending_timeout(unsigned long unused)
++{
++ tasklet_schedule(&net_tx_tasklet);
++}
++
++struct net_device_stats *netif_be_get_stats(struct net_device *dev)
++{
++ netif_t *netif = netdev_priv(dev);
++ return &netif->stats;
++}
++
++static int __on_net_schedule_list(netif_t *netif)
++{
++ return netif->list.next != NULL;
++}
++
++static void remove_from_net_schedule_list(netif_t *netif)
++{
++ spin_lock_irq(&net_schedule_list_lock);
++ if (likely(__on_net_schedule_list(netif))) {
++ list_del(&netif->list);
++ netif->list.next = NULL;
++ netif_put(netif);
++ }
++ spin_unlock_irq(&net_schedule_list_lock);
++}
++
++static void add_to_net_schedule_list_tail(netif_t *netif)
++{
++ if (__on_net_schedule_list(netif))
++ return;
++
++ spin_lock_irq(&net_schedule_list_lock);
++ if (!__on_net_schedule_list(netif) &&
++ likely(netif_schedulable(netif))) {
++ list_add_tail(&netif->list, &net_schedule_list);
++ netif_get(netif);
++ }
++ spin_unlock_irq(&net_schedule_list_lock);
++}
++
++/*
++ * Note on CONFIG_XEN_NETDEV_PIPELINED_TRANSMITTER:
++ * If this driver is pipelining transmit requests then we can be very
++ * aggressive in avoiding new-packet notifications -- frontend only needs to
++ * send a notification if there are no outstanding unreceived responses.
++ * If we may be buffer transmit buffers for any reason then we must be rather
++ * more conservative and treat this as the final check for pending work.
++ */
++void netif_schedule_work(netif_t *netif)
++{
++ int more_to_do;
++
++#ifdef CONFIG_XEN_NETDEV_PIPELINED_TRANSMITTER
++ more_to_do = RING_HAS_UNCONSUMED_REQUESTS(&netif->tx);
++#else
++ RING_FINAL_CHECK_FOR_REQUESTS(&netif->tx, more_to_do);
++#endif
++
++ if (more_to_do) {
++ add_to_net_schedule_list_tail(netif);
++ maybe_schedule_tx_action();
++ }
++}
++
++void netif_deschedule_work(netif_t *netif)
++{
++ remove_from_net_schedule_list(netif);
++}
++
++
++static void tx_add_credit(netif_t *netif)
++{
++ unsigned long max_burst, max_credit;
++
++ /*
++ * Allow a burst big enough to transmit a jumbo packet of up to 128kB.
++ * Otherwise the interface can seize up due to insufficient credit.
++ */
++ max_burst = RING_GET_REQUEST(&netif->tx, netif->tx.req_cons)->size;
++ max_burst = min(max_burst, 131072UL);
++ max_burst = max(max_burst, netif->credit_bytes);
++
++ /* Take care that adding a new chunk of credit doesn't wrap to zero. */
++ max_credit = netif->remaining_credit + netif->credit_bytes;
++ if (max_credit < netif->remaining_credit)
++ max_credit = ULONG_MAX; /* wrapped: clamp to ULONG_MAX */
++
++ netif->remaining_credit = min(max_credit, max_burst);
++}
++
++static void tx_credit_callback(unsigned long data)
++{
++ netif_t *netif = (netif_t *)data;
++ tx_add_credit(netif);
++ netif_schedule_work(netif);
++}
++
++static inline int copy_pending_req(PEND_RING_IDX pending_idx)
++{
++ return gnttab_copy_grant_page(grant_tx_handle[pending_idx],
++ &mmap_pages[pending_idx]);
++}
++
++inline static void net_tx_action_dealloc(void)
++{
++ struct netbk_tx_pending_inuse *inuse, *n;
++ gnttab_unmap_grant_ref_t *gop;
++ u16 pending_idx;
++ PEND_RING_IDX dc, dp;
++ netif_t *netif;
++ int ret;
++ LIST_HEAD(list);
++
++ dc = dealloc_cons;
++ gop = tx_unmap_ops;
++
++ /*
++ * Free up any grants we have finished using
++ */
++ do {
++ dp = dealloc_prod;
++
++ /* Ensure we see all indices enqueued by netif_idx_release(). */
++ smp_rmb();
++
++ while (dc != dp) {
++ unsigned long pfn;
++
++ pending_idx = dealloc_ring[MASK_PEND_IDX(dc++)];
++ list_move_tail(&pending_inuse[pending_idx].list, &list);
++
++ pfn = idx_to_pfn(pending_idx);
++ /* Already unmapped? */
++ if (!phys_to_machine_mapping_valid(pfn))
++ continue;
++
++ gnttab_set_unmap_op(gop, idx_to_kaddr(pending_idx),
++ GNTMAP_host_map,
++ grant_tx_handle[pending_idx]);
++ gop++;
++ }
++
++ if (netbk_copy_skb_mode != NETBK_DELAYED_COPY_SKB ||
++ list_empty(&pending_inuse_head))
++ break;
++
++ /* Copy any entries that have been pending for too long. */
++ list_for_each_entry_safe(inuse, n, &pending_inuse_head, list) {
++ if (time_after(inuse->alloc_time + HZ / 2, jiffies))
++ break;
++
++ switch (copy_pending_req(inuse - pending_inuse)) {
++ case 0:
++ list_move_tail(&inuse->list, &list);
++ continue;
++ case -EBUSY:
++ list_del_init(&inuse->list);
++ continue;
++ case -ENOENT:
++ continue;
++ }
++
++ break;
++ }
++ } while (dp != dealloc_prod);
++
++ dealloc_cons = dc;
++
++ ret = HYPERVISOR_grant_table_op(
++ GNTTABOP_unmap_grant_ref, tx_unmap_ops, gop - tx_unmap_ops);
++ BUG_ON(ret);
++
++ list_for_each_entry_safe(inuse, n, &list, list) {
++ pending_idx = inuse - pending_inuse;
++
++ netif = pending_tx_info[pending_idx].netif;
++
++ make_tx_response(netif, &pending_tx_info[pending_idx].req,
++ NETIF_RSP_OKAY);
++
++ /* Ready for next use. */
++ gnttab_reset_grant_page(mmap_pages[pending_idx]);
++
++ pending_ring[MASK_PEND_IDX(pending_prod++)] = pending_idx;
++
++ netif_put(netif);
++
++ list_del_init(&inuse->list);
++ }
++}
++
++static void netbk_tx_err(netif_t *netif, netif_tx_request_t *txp, RING_IDX end)
++{
++ RING_IDX cons = netif->tx.req_cons;
++
++ do {
++ make_tx_response(netif, txp, NETIF_RSP_ERROR);
++ if (cons >= end)
++ break;
++ txp = RING_GET_REQUEST(&netif->tx, cons++);
++ } while (1);
++ netif->tx.req_cons = cons;
++ netif_schedule_work(netif);
++ netif_put(netif);
++}
++
++static int netbk_count_requests(netif_t *netif, netif_tx_request_t *first,
++ netif_tx_request_t *txp, int work_to_do)
++{
++ RING_IDX cons = netif->tx.req_cons;
++ int frags = 0;
++
++ if (!(first->flags & NETTXF_more_data))
++ return 0;
++
++ do {
++ if (frags >= work_to_do) {
++ DPRINTK("Need more frags\n");
++ return -frags;
++ }
++
++ if (unlikely(frags >= MAX_SKB_FRAGS)) {
++ DPRINTK("Too many frags\n");
++ return -frags;
++ }
++
++ memcpy(txp, RING_GET_REQUEST(&netif->tx, cons + frags),
++ sizeof(*txp));
++ if (txp->size > first->size) {
++ DPRINTK("Frags galore\n");
++ return -frags;
++ }
++
++ first->size -= txp->size;
++ frags++;
++
++ if (unlikely((txp->offset + txp->size) > PAGE_SIZE)) {
++ DPRINTK("txp->offset: %x, size: %u\n",
++ txp->offset, txp->size);
++ return -frags;
++ }
++ } while ((txp++)->flags & NETTXF_more_data);
++
++ return frags;
++}
++
++static gnttab_map_grant_ref_t *netbk_get_requests(netif_t *netif,
++ struct sk_buff *skb,
++ netif_tx_request_t *txp,
++ gnttab_map_grant_ref_t *mop)
++{
++ struct skb_shared_info *shinfo = skb_shinfo(skb);
++ skb_frag_t *frags = shinfo->frags;
++ unsigned long pending_idx = *((u16 *)skb->data);
++ int i, start;
++
++ /* Skip first skb fragment if it is on same page as header fragment. */
++ start = ((unsigned long)shinfo->frags[0].page == pending_idx);
++
++ for (i = start; i < shinfo->nr_frags; i++, txp++) {
++ pending_idx = pending_ring[MASK_PEND_IDX(pending_cons++)];
++
++ gnttab_set_map_op(mop++, idx_to_kaddr(pending_idx),
++ GNTMAP_host_map | GNTMAP_readonly,
++ txp->gref, netif->domid);
++
++ memcpy(&pending_tx_info[pending_idx].req, txp, sizeof(*txp));
++ netif_get(netif);
++ pending_tx_info[pending_idx].netif = netif;
++ frags[i].page = (void *)pending_idx;
++ }
++
++ return mop;
++}
++
++static int netbk_tx_check_mop(struct sk_buff *skb,
++ gnttab_map_grant_ref_t **mopp)
++{
++ gnttab_map_grant_ref_t *mop = *mopp;
++ int pending_idx = *((u16 *)skb->data);
++ netif_t *netif = pending_tx_info[pending_idx].netif;
++ netif_tx_request_t *txp;
++ struct skb_shared_info *shinfo = skb_shinfo(skb);
++ int nr_frags = shinfo->nr_frags;
++ int i, err, start;
++
++ /* Check status of header. */
++ err = mop->status;
++ if (unlikely(err)) {
++ txp = &pending_tx_info[pending_idx].req;
++ make_tx_response(netif, txp, NETIF_RSP_ERROR);
++ pending_ring[MASK_PEND_IDX(pending_prod++)] = pending_idx;
++ netif_put(netif);
++ } else {
++ set_phys_to_machine(
++ __pa(idx_to_kaddr(pending_idx)) >> PAGE_SHIFT,
++ FOREIGN_FRAME(mop->dev_bus_addr >> PAGE_SHIFT));
++ grant_tx_handle[pending_idx] = mop->handle;
++ }
++
++ /* Skip first skb fragment if it is on same page as header fragment. */
++ start = ((unsigned long)shinfo->frags[0].page == pending_idx);
++
++ for (i = start; i < nr_frags; i++) {
++ int j, newerr;
++
++ pending_idx = (unsigned long)shinfo->frags[i].page;
++
++ /* Check error status: if okay then remember grant handle. */
++ newerr = (++mop)->status;
++ if (likely(!newerr)) {
++ set_phys_to_machine(
++ __pa(idx_to_kaddr(pending_idx))>>PAGE_SHIFT,
++ FOREIGN_FRAME(mop->dev_bus_addr>>PAGE_SHIFT));
++ grant_tx_handle[pending_idx] = mop->handle;
++ /* Had a previous error? Invalidate this fragment. */
++ if (unlikely(err))
++ netif_idx_release(pending_idx);
++ continue;
++ }
++
++ /* Error on this fragment: respond to client with an error. */
++ txp = &pending_tx_info[pending_idx].req;
++ make_tx_response(netif, txp, NETIF_RSP_ERROR);
++ pending_ring[MASK_PEND_IDX(pending_prod++)] = pending_idx;
++ netif_put(netif);
++
++ /* Not the first error? Preceding frags already invalidated. */
++ if (err)
++ continue;
++
++ /* First error: invalidate header and preceding fragments. */
++ pending_idx = *((u16 *)skb->data);
++ netif_idx_release(pending_idx);
++ for (j = start; j < i; j++) {
++ pending_idx = (unsigned long)shinfo->frags[i].page;
++ netif_idx_release(pending_idx);
++ }
++
++ /* Remember the error: invalidate all subsequent fragments. */
++ err = newerr;
++ }
++
++ *mopp = mop + 1;
++ return err;
++}
++
++static void netbk_fill_frags(struct sk_buff *skb)
++{
++ struct skb_shared_info *shinfo = skb_shinfo(skb);
++ int nr_frags = shinfo->nr_frags;
++ int i;
++
++ for (i = 0; i < nr_frags; i++) {
++ skb_frag_t *frag = shinfo->frags + i;
++ netif_tx_request_t *txp;
++ unsigned long pending_idx;
++
++ pending_idx = (unsigned long)frag->page;
++
++ pending_inuse[pending_idx].alloc_time = jiffies;
++ list_add_tail(&pending_inuse[pending_idx].list,
++ &pending_inuse_head);
++
++ txp = &pending_tx_info[pending_idx].req;
++ frag->page = virt_to_page(idx_to_kaddr(pending_idx));
++ frag->size = txp->size;
++ frag->page_offset = txp->offset;
++
++ skb->len += txp->size;
++ skb->data_len += txp->size;
++ skb->truesize += txp->size;
++ }
++}
++
++int netbk_get_extras(netif_t *netif, struct netif_extra_info *extras,
++ int work_to_do)
++{
++ struct netif_extra_info extra;
++ RING_IDX cons = netif->tx.req_cons;
++
++ do {
++ if (unlikely(work_to_do-- <= 0)) {
++ DPRINTK("Missing extra info\n");
++ return -EBADR;
++ }
++
++ memcpy(&extra, RING_GET_REQUEST(&netif->tx, cons),
++ sizeof(extra));
++ if (unlikely(!extra.type ||
++ extra.type >= XEN_NETIF_EXTRA_TYPE_MAX)) {
++ netif->tx.req_cons = ++cons;
++ DPRINTK("Invalid extra type: %d\n", extra.type);
++ return -EINVAL;
++ }
++
++ memcpy(&extras[extra.type - 1], &extra, sizeof(extra));
++ netif->tx.req_cons = ++cons;
++ } while (extra.flags & XEN_NETIF_EXTRA_FLAG_MORE);
++
++ return work_to_do;
++}
++
++static int netbk_set_skb_gso(struct sk_buff *skb, struct netif_extra_info *gso)
++{
++ if (!gso->u.gso.size) {
++ DPRINTK("GSO size must not be zero.\n");
++ return -EINVAL;
++ }
++
++ /* Currently only TCPv4 S.O. is supported. */
++ if (gso->u.gso.type != XEN_NETIF_GSO_TYPE_TCPV4) {
++ DPRINTK("Bad GSO type %d.\n", gso->u.gso.type);
++ return -EINVAL;
++ }
++
++ skb_shinfo(skb)->gso_size = gso->u.gso.size;
++ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
++
++ /* Header must be checked, and gso_segs computed. */
++ skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
++ skb_shinfo(skb)->gso_segs = 0;
++
++ return 0;
++}
++
++/* Called after netfront has transmitted */
++static void net_tx_action(unsigned long unused)
++{
++ struct list_head *ent;
++ struct sk_buff *skb;
++ netif_t *netif;
++ netif_tx_request_t txreq;
++ netif_tx_request_t txfrags[MAX_SKB_FRAGS];
++ struct netif_extra_info extras[XEN_NETIF_EXTRA_TYPE_MAX - 1];
++ u16 pending_idx;
++ RING_IDX i;
++ gnttab_map_grant_ref_t *mop;
++ unsigned int data_len;
++ int ret, work_to_do;
++
++ if (dealloc_cons != dealloc_prod)
++ net_tx_action_dealloc();
++
++ mop = tx_map_ops;
++ while (((NR_PENDING_REQS + MAX_SKB_FRAGS) < MAX_PENDING_REQS) &&
++ !list_empty(&net_schedule_list)) {
++ /* Get a netif from the list with work to do. */
++ ent = net_schedule_list.next;
++ netif = list_entry(ent, netif_t, list);
++ netif_get(netif);
++ remove_from_net_schedule_list(netif);
++
++ RING_FINAL_CHECK_FOR_REQUESTS(&netif->tx, work_to_do);
++ if (!work_to_do) {
++ netif_put(netif);
++ continue;
++ }
++
++ i = netif->tx.req_cons;
++ rmb(); /* Ensure that we see the request before we copy it. */
++ memcpy(&txreq, RING_GET_REQUEST(&netif->tx, i), sizeof(txreq));
++
++ /* Credit-based scheduling. */
++ if (txreq.size > netif->remaining_credit) {
++ unsigned long now = jiffies;
++ unsigned long next_credit =
++ netif->credit_timeout.expires +
++ msecs_to_jiffies(netif->credit_usec / 1000);
++
++ /* Timer could already be pending in rare cases. */
++ if (timer_pending(&netif->credit_timeout)) {
++ netif_put(netif);
++ continue;
++ }
++
++ /* Passed the point where we can replenish credit? */
++ if (time_after_eq(now, next_credit)) {
++ netif->credit_timeout.expires = now;
++ tx_add_credit(netif);
++ }
++
++ /* Still too big to send right now? Set a callback. */
++ if (txreq.size > netif->remaining_credit) {
++ netif->credit_timeout.data =
++ (unsigned long)netif;
++ netif->credit_timeout.function =
++ tx_credit_callback;
++ __mod_timer(&netif->credit_timeout,
++ next_credit);
++ netif_put(netif);
++ continue;
++ }
++ }
++ netif->remaining_credit -= txreq.size;
++
++ work_to_do--;
++ netif->tx.req_cons = ++i;
++
++ memset(extras, 0, sizeof(extras));
++ if (txreq.flags & NETTXF_extra_info) {
++ work_to_do = netbk_get_extras(netif, extras,
++ work_to_do);
++ i = netif->tx.req_cons;
++ if (unlikely(work_to_do < 0)) {
++ netbk_tx_err(netif, &txreq, i);
++ continue;
++ }
++ }
++
++ ret = netbk_count_requests(netif, &txreq, txfrags, work_to_do);
++ if (unlikely(ret < 0)) {
++ netbk_tx_err(netif, &txreq, i - ret);
++ continue;
++ }
++ i += ret;
++
++ if (unlikely(txreq.size < ETH_HLEN)) {
++ DPRINTK("Bad packet size: %d\n", txreq.size);
++ netbk_tx_err(netif, &txreq, i);
++ continue;
++ }
++
++ /* No crossing a page as the payload mustn't fragment. */
++ if (unlikely((txreq.offset + txreq.size) > PAGE_SIZE)) {
++ DPRINTK("txreq.offset: %x, size: %u, end: %lu\n",
++ txreq.offset, txreq.size,
++ (txreq.offset &~PAGE_MASK) + txreq.size);
++ netbk_tx_err(netif, &txreq, i);
++ continue;
++ }
++
++ pending_idx = pending_ring[MASK_PEND_IDX(pending_cons)];
++
++ data_len = (txreq.size > PKT_PROT_LEN &&
++ ret < MAX_SKB_FRAGS) ?
++ PKT_PROT_LEN : txreq.size;
++
++ skb = alloc_skb(data_len + 16 + NET_IP_ALIGN,
++ GFP_ATOMIC | __GFP_NOWARN);
++ if (unlikely(skb == NULL)) {
++ DPRINTK("Can't allocate a skb in start_xmit.\n");
++ netbk_tx_err(netif, &txreq, i);
++ break;
++ }
++
++ /* Packets passed to netif_rx() must have some headroom. */
++ skb_reserve(skb, 16 + NET_IP_ALIGN);
++
++ if (extras[XEN_NETIF_EXTRA_TYPE_GSO - 1].type) {
++ struct netif_extra_info *gso;
++ gso = &extras[XEN_NETIF_EXTRA_TYPE_GSO - 1];
++
++ if (netbk_set_skb_gso(skb, gso)) {
++ kfree_skb(skb);
++ netbk_tx_err(netif, &txreq, i);
++ continue;
++ }
++ }
++
++ gnttab_set_map_op(mop, idx_to_kaddr(pending_idx),
++ GNTMAP_host_map | GNTMAP_readonly,
++ txreq.gref, netif->domid);
++ mop++;
++
++ memcpy(&pending_tx_info[pending_idx].req,
++ &txreq, sizeof(txreq));
++ pending_tx_info[pending_idx].netif = netif;
++ *((u16 *)skb->data) = pending_idx;
++
++ __skb_put(skb, data_len);
++
++ skb_shinfo(skb)->nr_frags = ret;
++ if (data_len < txreq.size) {
++ skb_shinfo(skb)->nr_frags++;
++ skb_shinfo(skb)->frags[0].page =
++ (void *)(unsigned long)pending_idx;
++ } else {
++ /* Discriminate from any valid pending_idx value. */
++ skb_shinfo(skb)->frags[0].page = (void *)~0UL;
++ }
++
++ __skb_queue_tail(&tx_queue, skb);
++
++ pending_cons++;
++
++ mop = netbk_get_requests(netif, skb, txfrags, mop);
++
++ netif->tx.req_cons = i;
++ netif_schedule_work(netif);
++
++ if ((mop - tx_map_ops) >= ARRAY_SIZE(tx_map_ops))
++ break;
++ }
++
++ if (mop == tx_map_ops)
++ return;
++
++ ret = HYPERVISOR_grant_table_op(
++ GNTTABOP_map_grant_ref, tx_map_ops, mop - tx_map_ops);
++ BUG_ON(ret);
++
++ mop = tx_map_ops;
++ while ((skb = __skb_dequeue(&tx_queue)) != NULL) {
++ netif_tx_request_t *txp;
++
++ pending_idx = *((u16 *)skb->data);
++ netif = pending_tx_info[pending_idx].netif;
++ txp = &pending_tx_info[pending_idx].req;
++
++ /* Check the remap error code. */
++ if (unlikely(netbk_tx_check_mop(skb, &mop))) {
++ DPRINTK("netback grant failed.\n");
++ skb_shinfo(skb)->nr_frags = 0;
++ kfree_skb(skb);
++ continue;
++ }
++
++ data_len = skb->len;
++ memcpy(skb->data,
++ (void *)(idx_to_kaddr(pending_idx)|txp->offset),
++ data_len);
++ if (data_len < txp->size) {
++ /* Append the packet payload as a fragment. */
++ txp->offset += data_len;
++ txp->size -= data_len;
++ } else {
++ /* Schedule a response immediately. */
++ netif_idx_release(pending_idx);
++ }
++
++ /*
++ * Old frontends do not assert data_validated but we
++ * can infer it from csum_blank so test both flags.
++ */
++ if (txp->flags & (NETTXF_data_validated|NETTXF_csum_blank)) {
++ skb->ip_summed = CHECKSUM_UNNECESSARY;
++ skb->proto_data_valid = 1;
++ } else {
++ skb->ip_summed = CHECKSUM_NONE;
++ skb->proto_data_valid = 0;
++ }
++ skb->proto_csum_blank = !!(txp->flags & NETTXF_csum_blank);
++
++ netbk_fill_frags(skb);
++
++ skb->dev = netif->dev;
++ skb->protocol = eth_type_trans(skb, skb->dev);
++
++ netif->stats.rx_bytes += skb->len;
++ netif->stats.rx_packets++;
++
++ if (unlikely(netbk_copy_skb_mode == NETBK_ALWAYS_COPY_SKB) &&
++ unlikely(skb_linearize(skb))) {
++ DPRINTK("Can't linearize skb in net_tx_action.\n");
++ kfree_skb(skb);
++ continue;
++ }
++
++ netif_rx(skb);
++ netif->dev->last_rx = jiffies;
++ }
++
++ if (netbk_copy_skb_mode == NETBK_DELAYED_COPY_SKB &&
++ !list_empty(&pending_inuse_head)) {
++ struct netbk_tx_pending_inuse *oldest;
++
++ oldest = list_entry(pending_inuse_head.next,
++ struct netbk_tx_pending_inuse, list);
++ mod_timer(&netbk_tx_pending_timer, oldest->alloc_time + HZ);
++ }
++}
++
++static void netif_idx_release(u16 pending_idx)
++{
++ static DEFINE_SPINLOCK(_lock);
++ unsigned long flags;
++
++ spin_lock_irqsave(&_lock, flags);
++ dealloc_ring[MASK_PEND_IDX(dealloc_prod)] = pending_idx;
++ /* Sync with net_tx_action_dealloc: insert idx /then/ incr producer. */
++ smp_wmb();
++ dealloc_prod++;
++ spin_unlock_irqrestore(&_lock, flags);
++
++ tasklet_schedule(&net_tx_tasklet);
++}
++
++static void netif_page_release(struct page *page)
++{
++ netif_idx_release(netif_page_index(page));
++}
++
++irqreturn_t netif_be_int(int irq, void *dev_id, struct pt_regs *regs)
++{
++ netif_t *netif = dev_id;
++
++ add_to_net_schedule_list_tail(netif);
++ maybe_schedule_tx_action();
++
++ if (netif_schedulable(netif) && !netbk_queue_full(netif))
++ netif_wake_queue(netif->dev);
++
++ return IRQ_HANDLED;
++}
++
++static void make_tx_response(netif_t *netif,
++ netif_tx_request_t *txp,
++ s8 st)
++{
++ RING_IDX i = netif->tx.rsp_prod_pvt;
++ netif_tx_response_t *resp;
++ int notify;
++
++ resp = RING_GET_RESPONSE(&netif->tx, i);
++ resp->id = txp->id;
++ resp->status = st;
++
++ if (txp->flags & NETTXF_extra_info)
++ RING_GET_RESPONSE(&netif->tx, ++i)->status = NETIF_RSP_NULL;
++
++ netif->tx.rsp_prod_pvt = ++i;
++ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netif->tx, notify);
++ if (notify)
++ notify_remote_via_irq(netif->irq);
++
++#ifdef CONFIG_XEN_NETDEV_PIPELINED_TRANSMITTER
++ if (i == netif->tx.req_cons) {
++ int more_to_do;
++ RING_FINAL_CHECK_FOR_REQUESTS(&netif->tx, more_to_do);
++ if (more_to_do)
++ add_to_net_schedule_list_tail(netif);
++ }
++#endif
++}
++
++static netif_rx_response_t *make_rx_response(netif_t *netif,
++ u16 id,
++ s8 st,
++ u16 offset,
++ u16 size,
++ u16 flags)
++{
++ RING_IDX i = netif->rx.rsp_prod_pvt;
++ netif_rx_response_t *resp;
++
++ resp = RING_GET_RESPONSE(&netif->rx, i);
++ resp->offset = offset;
++ resp->flags = flags;
++ resp->id = id;
++ resp->status = (s16)size;
++ if (st < 0)
++ resp->status = (s16)st;
++
++ netif->rx.rsp_prod_pvt = ++i;
++
++ return resp;
++}
++
++#ifdef NETBE_DEBUG_INTERRUPT
++static irqreturn_t netif_be_dbg(int irq, void *dev_id, struct pt_regs *regs)
++{
++ struct list_head *ent;
++ netif_t *netif;
++ int i = 0;
++
++ printk(KERN_ALERT "netif_schedule_list:\n");
++ spin_lock_irq(&net_schedule_list_lock);
++
++ list_for_each (ent, &net_schedule_list) {
++ netif = list_entry(ent, netif_t, list);
++ printk(KERN_ALERT " %d: private(rx_req_cons=%08x "
++ "rx_resp_prod=%08x\n",
++ i, netif->rx.req_cons, netif->rx.rsp_prod_pvt);
++ printk(KERN_ALERT " tx_req_cons=%08x tx_resp_prod=%08x)\n",
++ netif->tx.req_cons, netif->tx.rsp_prod_pvt);
++ printk(KERN_ALERT " shared(rx_req_prod=%08x "
++ "rx_resp_prod=%08x\n",
++ netif->rx.sring->req_prod, netif->rx.sring->rsp_prod);
++ printk(KERN_ALERT " rx_event=%08x tx_req_prod=%08x\n",
++ netif->rx.sring->rsp_event, netif->tx.sring->req_prod);
++ printk(KERN_ALERT " tx_resp_prod=%08x, tx_event=%08x)\n",
++ netif->tx.sring->rsp_prod, netif->tx.sring->rsp_event);
++ i++;
++ }
++
++ spin_unlock_irq(&net_schedule_list_lock);
++ printk(KERN_ALERT " ** End of netif_schedule_list **\n");
++
++ return IRQ_HANDLED;
++}
++#endif
++
++static int __init netback_init(void)
++{
++ int i;
++ struct page *page;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ /* We can increase reservation by this much in net_rx_action(). */
++ balloon_update_driver_allowance(NET_RX_RING_SIZE);
++
++ skb_queue_head_init(&rx_queue);
++ skb_queue_head_init(&tx_queue);
++
++ init_timer(&net_timer);
++ net_timer.data = 0;
++ net_timer.function = net_alarm;
++
++ init_timer(&netbk_tx_pending_timer);
++ netbk_tx_pending_timer.data = 0;
++ netbk_tx_pending_timer.function = netbk_tx_pending_timeout;
++
++ mmap_pages = alloc_empty_pages_and_pagevec(MAX_PENDING_REQS);
++ if (mmap_pages == NULL) {
++ printk("%s: out of memory\n", __FUNCTION__);
++ return -ENOMEM;
++ }
++
++ for (i = 0; i < MAX_PENDING_REQS; i++) {
++ page = mmap_pages[i];
++ SetPageForeign(page, netif_page_release);
++ netif_page_index(page) = i;
++ INIT_LIST_HEAD(&pending_inuse[i].list);
++ }
++
++ pending_cons = 0;
++ pending_prod = MAX_PENDING_REQS;
++ for (i = 0; i < MAX_PENDING_REQS; i++)
++ pending_ring[i] = i;
++
++ spin_lock_init(&net_schedule_list_lock);
++ INIT_LIST_HEAD(&net_schedule_list);
++
++ netbk_copy_skb_mode = NETBK_DONT_COPY_SKB;
++ if (MODPARM_copy_skb) {
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_and_replace,
++ NULL, 0))
++ netbk_copy_skb_mode = NETBK_ALWAYS_COPY_SKB;
++ else
++ netbk_copy_skb_mode = NETBK_DELAYED_COPY_SKB;
++ }
++
++ netif_accel_init();
++
++ netif_xenbus_init();
++
++#ifdef NETBE_DEBUG_INTERRUPT
++ (void)bind_virq_to_irqhandler(VIRQ_DEBUG,
++ 0,
++ netif_be_dbg,
++ SA_SHIRQ,
++ "net-be-dbg",
++ &netif_be_dbg);
++#endif
++
++ return 0;
++}
++
++module_init(netback_init);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/netback/xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netback/xenbus.c 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,454 @@
++/* Xenbus code for netif backend
++ Copyright (C) 2005 Rusty Russell <rusty@rustcorp.com.au>
++ Copyright (C) 2005 XenSource Ltd
++
++ This program is free software; you can redistribute it and/or modify
++ it under the terms of the GNU General Public License as published by
++ the Free Software Foundation; either version 2 of the License, or
++ (at your option) any later version.
++
++ This program is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ GNU General Public License for more details.
++
++ You should have received a copy of the GNU General Public License
++ along with this program; if not, write to the Free Software
++ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++*/
++
++#include <stdarg.h>
++#include <linux/module.h>
++#include <xen/xenbus.h>
++#include "common.h"
++
++#if 0
++#undef DPRINTK
++#define DPRINTK(fmt, args...) \
++ printk("netback/xenbus (%s:%d) " fmt ".\n", __FUNCTION__, __LINE__, ##args)
++#endif
++
++
++static int connect_rings(struct backend_info *);
++static void connect(struct backend_info *);
++static void backend_create_netif(struct backend_info *be);
++
++static int netback_remove(struct xenbus_device *dev)
++{
++ struct backend_info *be = dev->dev.driver_data;
++
++ netback_remove_accelerators(be, dev);
++
++ if (be->netif) {
++ kobject_uevent(&dev->dev.kobj, KOBJ_OFFLINE);
++ netif_disconnect(be->netif);
++ be->netif = NULL;
++ }
++ kfree(be);
++ dev->dev.driver_data = NULL;
++ return 0;
++}
++
++
++/**
++ * Entry point to this code when a new device is created. Allocate the basic
++ * structures and switch to InitWait.
++ */
++static int netback_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ const char *message;
++ struct xenbus_transaction xbt;
++ int err;
++ int sg;
++ struct backend_info *be = kzalloc(sizeof(struct backend_info),
++ GFP_KERNEL);
++ if (!be) {
++ xenbus_dev_fatal(dev, -ENOMEM,
++ "allocating backend structure");
++ return -ENOMEM;
++ }
++
++ be->dev = dev;
++ dev->dev.driver_data = be;
++
++ sg = 1;
++ if (netbk_copy_skb_mode == NETBK_ALWAYS_COPY_SKB)
++ sg = 0;
++
++ do {
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "starting transaction");
++ goto fail;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "feature-sg", "%d", sg);
++ if (err) {
++ message = "writing feature-sg";
++ goto abort_transaction;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv4",
++ "%d", sg);
++ if (err) {
++ message = "writing feature-gso-tcpv4";
++ goto abort_transaction;
++ }
++
++ /* We support rx-copy path. */
++ err = xenbus_printf(xbt, dev->nodename,
++ "feature-rx-copy", "%d", 1);
++ if (err) {
++ message = "writing feature-rx-copy";
++ goto abort_transaction;
++ }
++
++ /*
++ * We don't support rx-flip path (except old guests who don't
++ * grok this feature flag).
++ */
++ err = xenbus_printf(xbt, dev->nodename,
++ "feature-rx-flip", "%d", 0);
++ if (err) {
++ message = "writing feature-rx-flip";
++ goto abort_transaction;
++ }
++
++ err = xenbus_transaction_end(xbt, 0);
++ } while (err == -EAGAIN);
++
++ if (err) {
++ xenbus_dev_fatal(dev, err, "completing transaction");
++ goto fail;
++ }
++
++ netback_probe_accelerators(be, dev);
++
++ err = xenbus_switch_state(dev, XenbusStateInitWait);
++ if (err)
++ goto fail;
++
++ /* This kicks hotplug scripts, so do it immediately. */
++ backend_create_netif(be);
++
++ return 0;
++
++abort_transaction:
++ xenbus_transaction_end(xbt, 1);
++ xenbus_dev_fatal(dev, err, "%s", message);
++fail:
++ DPRINTK("failed");
++ netback_remove(dev);
++ return err;
++}
++
++
++/**
++ * Handle the creation of the hotplug script environment. We add the script
++ * and vif variables to the environment, for the benefit of the vif-* hotplug
++ * scripts.
++ */
++static int netback_uevent(struct xenbus_device *xdev, char **envp,
++ int num_envp, char *buffer, int buffer_size)
++{
++ struct backend_info *be = xdev->dev.driver_data;
++ netif_t *netif = be->netif;
++ int i = 0, length = 0;
++ char *val;
++
++ DPRINTK("netback_uevent");
++
++ val = xenbus_read(XBT_NIL, xdev->nodename, "script", NULL);
++ if (IS_ERR(val)) {
++ int err = PTR_ERR(val);
++ xenbus_dev_fatal(xdev, err, "reading script");
++ return err;
++ }
++ else {
++ add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
++ &length, "script=%s", val);
++ kfree(val);
++ }
++
++ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++ "vif=%s", netif->dev->name);
++
++ envp[i] = NULL;
++
++ return 0;
++}
++
++
++static void backend_create_netif(struct backend_info *be)
++{
++ int err;
++ long handle;
++ struct xenbus_device *dev = be->dev;
++
++ if (be->netif != NULL)
++ return;
++
++ err = xenbus_scanf(XBT_NIL, dev->nodename, "handle", "%li", &handle);
++ if (err != 1) {
++ xenbus_dev_fatal(dev, err, "reading handle");
++ return;
++ }
++
++ be->netif = netif_alloc(dev->otherend_id, handle);
++ if (IS_ERR(be->netif)) {
++ err = PTR_ERR(be->netif);
++ be->netif = NULL;
++ xenbus_dev_fatal(dev, err, "creating interface");
++ return;
++ }
++
++ kobject_uevent(&dev->dev.kobj, KOBJ_ONLINE);
++}
++
++
++/**
++ * Callback received when the frontend's state changes.
++ */
++static void frontend_changed(struct xenbus_device *dev,
++ enum xenbus_state frontend_state)
++{
++ struct backend_info *be = dev->dev.driver_data;
++
++ DPRINTK("%s", xenbus_strstate(frontend_state));
++
++ be->frontend_state = frontend_state;
++
++ switch (frontend_state) {
++ case XenbusStateInitialising:
++ if (dev->state == XenbusStateClosed) {
++ printk(KERN_INFO "%s: %s: prepare for reconnect\n",
++ __FUNCTION__, dev->nodename);
++ xenbus_switch_state(dev, XenbusStateInitWait);
++ }
++ break;
++
++ case XenbusStateInitialised:
++ break;
++
++ case XenbusStateConnected:
++ if (dev->state == XenbusStateConnected)
++ break;
++ backend_create_netif(be);
++ if (be->netif)
++ connect(be);
++ break;
++
++ case XenbusStateClosing:
++ if (be->netif) {
++ kobject_uevent(&dev->dev.kobj, KOBJ_OFFLINE);
++ netif_disconnect(be->netif);
++ be->netif = NULL;
++ }
++ xenbus_switch_state(dev, XenbusStateClosing);
++ break;
++
++ case XenbusStateClosed:
++ xenbus_switch_state(dev, XenbusStateClosed);
++ if (xenbus_dev_is_online(dev))
++ break;
++ /* fall through if not online */
++ case XenbusStateUnknown:
++ device_unregister(&dev->dev);
++ break;
++
++ default:
++ xenbus_dev_fatal(dev, -EINVAL, "saw state %d at frontend",
++ frontend_state);
++ break;
++ }
++}
++
++
++static void xen_net_read_rate(struct xenbus_device *dev,
++ unsigned long *bytes, unsigned long *usec)
++{
++ char *s, *e;
++ unsigned long b, u;
++ char *ratestr;
++
++ /* Default to unlimited bandwidth. */
++ *bytes = ~0UL;
++ *usec = 0;
++
++ ratestr = xenbus_read(XBT_NIL, dev->nodename, "rate", NULL);
++ if (IS_ERR(ratestr))
++ return;
++
++ s = ratestr;
++ b = simple_strtoul(s, &e, 10);
++ if ((s == e) || (*e != ','))
++ goto fail;
++
++ s = e + 1;
++ u = simple_strtoul(s, &e, 10);
++ if ((s == e) || (*e != '\0'))
++ goto fail;
++
++ *bytes = b;
++ *usec = u;
++
++ kfree(ratestr);
++ return;
++
++ fail:
++ WPRINTK("Failed to parse network rate limit. Traffic unlimited.\n");
++ kfree(ratestr);
++}
++
++static int xen_net_read_mac(struct xenbus_device *dev, u8 mac[])
++{
++ char *s, *e, *macstr;
++ int i;
++
++ macstr = s = xenbus_read(XBT_NIL, dev->nodename, "mac", NULL);
++ if (IS_ERR(macstr))
++ return PTR_ERR(macstr);
++
++ for (i = 0; i < ETH_ALEN; i++) {
++ mac[i] = simple_strtoul(s, &e, 16);
++ if ((s == e) || (*e != ((i == ETH_ALEN-1) ? '\0' : ':'))) {
++ kfree(macstr);
++ return -ENOENT;
++ }
++ s = e+1;
++ }
++
++ kfree(macstr);
++ return 0;
++}
++
++static void connect(struct backend_info *be)
++{
++ int err;
++ struct xenbus_device *dev = be->dev;
++
++ err = connect_rings(be);
++ if (err)
++ return;
++
++ err = xen_net_read_mac(dev, be->netif->fe_dev_addr);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "parsing %s/mac", dev->nodename);
++ return;
++ }
++
++ xen_net_read_rate(dev, &be->netif->credit_bytes,
++ &be->netif->credit_usec);
++ be->netif->remaining_credit = be->netif->credit_bytes;
++
++ xenbus_switch_state(dev, XenbusStateConnected);
++
++ netif_wake_queue(be->netif->dev);
++}
++
++
++static int connect_rings(struct backend_info *be)
++{
++ struct xenbus_device *dev = be->dev;
++ unsigned long tx_ring_ref, rx_ring_ref;
++ unsigned int evtchn, rx_copy;
++ int err;
++ int val;
++
++ DPRINTK("");
++
++ err = xenbus_gather(XBT_NIL, dev->otherend,
++ "tx-ring-ref", "%lu", &tx_ring_ref,
++ "rx-ring-ref", "%lu", &rx_ring_ref,
++ "event-channel", "%u", &evtchn, NULL);
++ if (err) {
++ xenbus_dev_fatal(dev, err,
++ "reading %s/ring-ref and event-channel",
++ dev->otherend);
++ return err;
++ }
++
++ err = xenbus_scanf(XBT_NIL, dev->otherend, "request-rx-copy", "%u",
++ &rx_copy);
++ if (err == -ENOENT) {
++ err = 0;
++ rx_copy = 0;
++ }
++ if (err < 0) {
++ xenbus_dev_fatal(dev, err, "reading %s/request-rx-copy",
++ dev->otherend);
++ return err;
++ }
++ be->netif->copying_receiver = !!rx_copy;
++
++ if (be->netif->dev->tx_queue_len != 0) {
++ if (xenbus_scanf(XBT_NIL, dev->otherend,
++ "feature-rx-notify", "%d", &val) < 0)
++ val = 0;
++ if (val)
++ be->netif->can_queue = 1;
++ else
++ /* Must be non-zero for pfifo_fast to work. */
++ be->netif->dev->tx_queue_len = 1;
++ }
++
++ if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-sg", "%d", &val) < 0)
++ val = 0;
++ if (val) {
++ be->netif->features |= NETIF_F_SG;
++ be->netif->dev->features |= NETIF_F_SG;
++ }
++
++ if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-gso-tcpv4", "%d",
++ &val) < 0)
++ val = 0;
++ if (val) {
++ be->netif->features |= NETIF_F_TSO;
++ be->netif->dev->features |= NETIF_F_TSO;
++ }
++
++ if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-no-csum-offload",
++ "%d", &val) < 0)
++ val = 0;
++ if (val) {
++ be->netif->features &= ~NETIF_F_IP_CSUM;
++ be->netif->dev->features &= ~NETIF_F_IP_CSUM;
++ }
++
++ /* Map the shared frame, irq etc. */
++ err = netif_map(be->netif, tx_ring_ref, rx_ring_ref, evtchn);
++ if (err) {
++ xenbus_dev_fatal(dev, err,
++ "mapping shared-frames %lu/%lu port %u",
++ tx_ring_ref, rx_ring_ref, evtchn);
++ return err;
++ }
++ return 0;
++}
++
++
++/* ** Driver Registration ** */
++
++
++static const struct xenbus_device_id netback_ids[] = {
++ { "vif" },
++ { "" }
++};
++
++
++static struct xenbus_driver netback = {
++ .name = "vif",
++ .owner = THIS_MODULE,
++ .ids = netback_ids,
++ .probe = netback_probe,
++ .remove = netback_remove,
++ .uevent = netback_uevent,
++ .otherend_changed = frontend_changed,
++};
++
++
++void netif_xenbus_init(void)
++{
++ xenbus_register_backend(&netback);
++}
+Index: head-2008-11-25/drivers/xen/netfront/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netfront/Makefile 2007-07-12 08:54:23.000000000 +0200
+@@ -0,0 +1,4 @@
++
++obj-$(CONFIG_XEN_NETDEV_FRONTEND) := xennet.o
++
++xennet-objs := netfront.o accel.o
+Index: head-2008-11-25/drivers/xen/netfront/accel.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netfront/accel.c 2008-08-07 12:44:36.000000000 +0200
+@@ -0,0 +1,824 @@
++/******************************************************************************
++ * Virtual network driver for conversing with remote driver backends.
++ *
++ * Copyright (C) 2007 Solarflare Communications, Inc.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/netdevice.h>
++#include <linux/skbuff.h>
++#include <linux/list.h>
++#include <linux/mutex.h>
++#include <asm/hypervisor.h>
++#include <xen/xenbus.h>
++
++#include "netfront.h"
++
++#define DPRINTK(fmt, args...) \
++ pr_debug("netfront/accel (%s:%d) " fmt, \
++ __FUNCTION__, __LINE__, ##args)
++#define IPRINTK(fmt, args...) \
++ printk(KERN_INFO "netfront/accel: " fmt, ##args)
++#define WPRINTK(fmt, args...) \
++ printk(KERN_WARNING "netfront/accel: " fmt, ##args)
++
++static int netfront_remove_accelerator(struct netfront_info *np,
++ struct xenbus_device *dev);
++static int netfront_load_accelerator(struct netfront_info *np,
++ struct xenbus_device *dev,
++ const char *frontend);
++
++/*
++ * List of all netfront accelerator plugin modules available. Each
++ * list entry is of type struct netfront_accelerator.
++ */
++static struct list_head accelerators_list;
++
++/* Lock to protect access to accelerators_list */
++static spinlock_t accelerators_lock;
++
++/* Workqueue to process acceleration configuration changes */
++struct workqueue_struct *accel_watch_workqueue;
++
++/* Mutex to prevent concurrent loads and suspends, etc. */
++DEFINE_MUTEX(accelerator_mutex);
++
++void netif_init_accel(void)
++{
++ INIT_LIST_HEAD(&accelerators_list);
++ spin_lock_init(&accelerators_lock);
++
++ accel_watch_workqueue = create_workqueue("net_accel");
++}
++
++void netif_exit_accel(void)
++{
++ struct netfront_accelerator *accelerator, *tmp;
++ unsigned long flags;
++
++ flush_workqueue(accel_watch_workqueue);
++ destroy_workqueue(accel_watch_workqueue);
++
++ spin_lock_irqsave(&accelerators_lock, flags);
++
++ list_for_each_entry_safe(accelerator, tmp, &accelerators_list, link) {
++ BUG_ON(!list_empty(&accelerator->vif_states));
++
++ list_del(&accelerator->link);
++ kfree(accelerator->frontend);
++ kfree(accelerator);
++ }
++
++ spin_unlock_irqrestore(&accelerators_lock, flags);
++}
++
++
++/*
++ * Watch the configured accelerator and change plugin if it's modified
++ */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++static void accel_watch_work(struct work_struct *context)
++#else
++static void accel_watch_work(void *context)
++#endif
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ struct netfront_accel_vif_state *vif_state =
++ container_of(context, struct netfront_accel_vif_state,
++ accel_work);
++#else
++ struct netfront_accel_vif_state *vif_state =
++ (struct netfront_accel_vif_state *)context;
++#endif
++ struct netfront_info *np = vif_state->np;
++ char *accel_frontend;
++ int accel_len, rc = -1;
++
++ mutex_lock(&accelerator_mutex);
++
++ accel_frontend = xenbus_read(XBT_NIL, np->xbdev->otherend,
++ "accel-frontend", &accel_len);
++ if (IS_ERR(accel_frontend)) {
++ accel_frontend = NULL;
++ netfront_remove_accelerator(np, np->xbdev);
++ } else {
++ /* If this is the first time, request the accelerator,
++ otherwise only request one if it has changed */
++ if (vif_state->accel_frontend == NULL) {
++ rc = netfront_load_accelerator(np, np->xbdev,
++ accel_frontend);
++ } else {
++ if (strncmp(vif_state->accel_frontend, accel_frontend,
++ accel_len)) {
++ netfront_remove_accelerator(np, np->xbdev);
++ rc = netfront_load_accelerator(np, np->xbdev,
++ accel_frontend);
++ }
++ }
++ }
++
++ /* Get rid of previous state and replace with the new name */
++ if (vif_state->accel_frontend != NULL)
++ kfree(vif_state->accel_frontend);
++ vif_state->accel_frontend = accel_frontend;
++
++ mutex_unlock(&accelerator_mutex);
++
++ if (rc == 0) {
++ DPRINTK("requesting module %s\n", accel_frontend);
++ request_module("%s", accel_frontend);
++ /*
++ * Module should now call netfront_accelerator_loaded() once
++ * it's up and running, and we can continue from there
++ */
++ }
++}
++
++
++static void accel_watch_changed(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ struct netfront_accel_vif_state *vif_state =
++ container_of(watch, struct netfront_accel_vif_state,
++ accel_watch);
++ queue_work(accel_watch_workqueue, &vif_state->accel_work);
++}
++
++
++void netfront_accelerator_add_watch(struct netfront_info *np)
++{
++ int err;
++
++ /* Check we're not trying to overwrite an existing watch */
++ BUG_ON(np->accel_vif_state.accel_watch.node != NULL);
++
++ /* Get a watch on the accelerator plugin */
++ err = xenbus_watch_path2(np->xbdev, np->xbdev->otherend,
++ "accel-frontend",
++ &np->accel_vif_state.accel_watch,
++ accel_watch_changed);
++ if (err) {
++ DPRINTK("%s: Failed to register accel watch: %d\n",
++ __FUNCTION__, err);
++ np->accel_vif_state.accel_watch.node = NULL;
++ }
++}
++
++
++static
++void netfront_accelerator_remove_watch(struct netfront_info *np)
++{
++ struct netfront_accel_vif_state *vif_state = &np->accel_vif_state;
++
++ /* Get rid of watch on accelerator plugin */
++ if (vif_state->accel_watch.node != NULL) {
++ unregister_xenbus_watch(&vif_state->accel_watch);
++ kfree(vif_state->accel_watch.node);
++ vif_state->accel_watch.node = NULL;
++
++ flush_workqueue(accel_watch_workqueue);
++
++ /* Clean up any state left from watch */
++ if (vif_state->accel_frontend != NULL) {
++ kfree(vif_state->accel_frontend);
++ vif_state->accel_frontend = NULL;
++ }
++ }
++}
++
++
++/*
++ * Initialise the accel_vif_state field in the netfront state
++ */
++void init_accelerator_vif(struct netfront_info *np,
++ struct xenbus_device *dev)
++{
++ np->accelerator = NULL;
++
++ /* It's assumed that these things don't change */
++ np->accel_vif_state.np = np;
++ np->accel_vif_state.dev = dev;
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ INIT_WORK(&np->accel_vif_state.accel_work, accel_watch_work);
++#else
++ INIT_WORK(&np->accel_vif_state.accel_work, accel_watch_work,
++ &np->accel_vif_state);
++#endif
++}
++
++
++/*
++ * Compare a frontend description string against an accelerator to see
++ * if they match. Would ultimately be nice to replace the string with
++ * a unique numeric identifier for each accelerator.
++ */
++static int match_accelerator(const char *frontend,
++ struct netfront_accelerator *accelerator)
++{
++ return strcmp(frontend, accelerator->frontend) == 0;
++}
++
++
++/*
++ * Add a frontend vif to the list of vifs that is using a netfront
++ * accelerator plugin module.
++ */
++static void add_accelerator_vif(struct netfront_accelerator *accelerator,
++ struct netfront_info *np)
++{
++ unsigned long flags;
++
++ /* Need lock to write list */
++ spin_lock_irqsave(&accelerator->vif_states_lock, flags);
++
++ if (np->accelerator == NULL) {
++ np->accelerator = accelerator;
++
++ list_add(&np->accel_vif_state.link, &accelerator->vif_states);
++ } else {
++ /*
++ * May get here legitimately if suspend_cancel is
++ * called, but in that case configuration should not
++ * have changed
++ */
++ BUG_ON(np->accelerator != accelerator);
++ }
++
++ spin_unlock_irqrestore(&accelerator->vif_states_lock, flags);
++}
++
++
++/*
++ * Initialise the state to track an accelerator plugin module.
++ */
++static int init_accelerator(const char *frontend,
++ struct netfront_accelerator **result,
++ struct netfront_accel_hooks *hooks)
++{
++ struct netfront_accelerator *accelerator =
++ kmalloc(sizeof(struct netfront_accelerator), GFP_KERNEL);
++ unsigned long flags;
++ int frontend_len;
++
++ if (!accelerator) {
++ DPRINTK("no memory for accelerator\n");
++ return -ENOMEM;
++ }
++
++ frontend_len = strlen(frontend) + 1;
++ accelerator->frontend = kmalloc(frontend_len, GFP_KERNEL);
++ if (!accelerator->frontend) {
++ DPRINTK("no memory for accelerator\n");
++ kfree(accelerator);
++ return -ENOMEM;
++ }
++ strlcpy(accelerator->frontend, frontend, frontend_len);
++
++ INIT_LIST_HEAD(&accelerator->vif_states);
++ spin_lock_init(&accelerator->vif_states_lock);
++
++ accelerator->hooks = hooks;
++
++ spin_lock_irqsave(&accelerators_lock, flags);
++ list_add(&accelerator->link, &accelerators_list);
++ spin_unlock_irqrestore(&accelerators_lock, flags);
++
++ *result = accelerator;
++
++ return 0;
++}
++
++
++/*
++ * Modify the hooks stored in the per-vif state to match that in the
++ * netfront accelerator's state.
++ */
++static void
++accelerator_set_vif_state_hooks(struct netfront_accel_vif_state *vif_state)
++{
++ /* This function must be called with the vif_states_lock held */
++
++ DPRINTK("%p\n",vif_state);
++
++ /* Make sure there are no data path operations going on */
++ netif_poll_disable(vif_state->np->netdev);
++ netif_tx_lock_bh(vif_state->np->netdev);
++
++ vif_state->hooks = vif_state->np->accelerator->hooks;
++
++ netif_tx_unlock_bh(vif_state->np->netdev);
++ netif_poll_enable(vif_state->np->netdev);
++}
++
++
++static void accelerator_probe_new_vif(struct netfront_info *np,
++ struct xenbus_device *dev,
++ struct netfront_accelerator *accelerator)
++{
++ struct netfront_accel_hooks *hooks;
++ unsigned long flags;
++
++ DPRINTK("\n");
++
++ /* Include this frontend device on the accelerator's list */
++ add_accelerator_vif(accelerator, np);
++
++ hooks = accelerator->hooks;
++
++ if (hooks) {
++ if (hooks->new_device(np->netdev, dev) == 0) {
++ spin_lock_irqsave
++ (&accelerator->vif_states_lock, flags);
++
++ accelerator_set_vif_state_hooks(&np->accel_vif_state);
++
++ spin_unlock_irqrestore
++ (&accelerator->vif_states_lock, flags);
++ }
++ }
++
++ return;
++}
++
++
++/*
++ * Request that a particular netfront accelerator plugin is loaded.
++ * Usually called as a result of the vif configuration specifying
++ * which one to use. Must be called with accelerator_mutex held
++ */
++static int netfront_load_accelerator(struct netfront_info *np,
++ struct xenbus_device *dev,
++ const char *frontend)
++{
++ struct netfront_accelerator *accelerator;
++ int rc = 0;
++
++ DPRINTK(" %s\n", frontend);
++
++ /*
++ * Look at list of loaded accelerators to see if the requested
++ * one is already there
++ */
++ list_for_each_entry(accelerator, &accelerators_list, link) {
++ if (match_accelerator(frontend, accelerator)) {
++ accelerator_probe_new_vif(np, dev, accelerator);
++ return 0;
++ }
++ }
++
++ /* Couldn't find it, so create a new one and load the module */
++ if ((rc = init_accelerator(frontend, &accelerator, NULL)) < 0) {
++ return rc;
++ }
++
++ /* Include this frontend device on the accelerator's list */
++ add_accelerator_vif(accelerator, np);
++
++ return rc;
++}
++
++
++/*
++ * Go through all the netfront vifs and see if they have requested
++ * this accelerator. Notify the accelerator plugin of the relevant
++ * device if so. Called when an accelerator plugin module is first
++ * loaded and connects to netfront.
++ */
++static void
++accelerator_probe_vifs(struct netfront_accelerator *accelerator,
++ struct netfront_accel_hooks *hooks)
++{
++ struct netfront_accel_vif_state *vif_state, *tmp;
++ unsigned long flags;
++
++ DPRINTK("%p\n", accelerator);
++
++ /*
++ * Store the hooks for future calls to probe a new device, and
++ * to wire into the vif_state once the accelerator plugin is
++ * ready to accelerate each vif
++ */
++ BUG_ON(hooks == NULL);
++ accelerator->hooks = hooks;
++
++ /*
++ * currently hold accelerator_mutex, so don't need
++ * vif_states_lock to read the list
++ */
++ list_for_each_entry_safe(vif_state, tmp, &accelerator->vif_states,
++ link) {
++ struct netfront_info *np = vif_state->np;
++
++ if (hooks->new_device(np->netdev, vif_state->dev) == 0) {
++ spin_lock_irqsave
++ (&accelerator->vif_states_lock, flags);
++
++ accelerator_set_vif_state_hooks(vif_state);
++
++ spin_unlock_irqrestore
++ (&accelerator->vif_states_lock, flags);
++ }
++ }
++}
++
++
++/*
++ * Called by the netfront accelerator plugin module when it has loaded
++ */
++int netfront_accelerator_loaded(int version, const char *frontend,
++ struct netfront_accel_hooks *hooks)
++{
++ struct netfront_accelerator *accelerator;
++
++ if (is_initial_xendomain())
++ return -EINVAL;
++
++ if (version != NETFRONT_ACCEL_VERSION) {
++ if (version > NETFRONT_ACCEL_VERSION) {
++ /* Caller has higher version number, leave it
++ up to them to decide whether to continue.
++ They can re-call with a lower number if
++ they're happy to be compatible with us */
++ return NETFRONT_ACCEL_VERSION;
++ } else {
++ /* We have a more recent version than caller.
++ Currently reject, but may in future be able
++ to be backwardly compatible */
++ return -EPROTO;
++ }
++ }
++
++ mutex_lock(&accelerator_mutex);
++
++ /*
++ * Look through list of accelerators to see if it has already
++ * been requested
++ */
++ list_for_each_entry(accelerator, &accelerators_list, link) {
++ if (match_accelerator(frontend, accelerator)) {
++ accelerator_probe_vifs(accelerator, hooks);
++ goto out;
++ }
++ }
++
++ /*
++ * If it wasn't in the list, add it now so that when it is
++ * requested the caller will find it
++ */
++ DPRINTK("Couldn't find matching accelerator (%s)\n",
++ frontend);
++
++ init_accelerator(frontend, &accelerator, hooks);
++
++ out:
++ mutex_unlock(&accelerator_mutex);
++ return 0;
++}
++EXPORT_SYMBOL_GPL(netfront_accelerator_loaded);
++
++
++/*
++ * Remove the hooks from a single vif state.
++ */
++static void
++accelerator_remove_single_hook(struct netfront_accelerator *accelerator,
++ struct netfront_accel_vif_state *vif_state)
++{
++ /* Make sure there are no data path operations going on */
++ netif_poll_disable(vif_state->np->netdev);
++ netif_tx_lock_bh(vif_state->np->netdev);
++
++ /*
++ * Remove the hooks, but leave the vif_state on the
++ * accelerator's list as that signifies this vif is
++ * interested in using that accelerator if it becomes
++ * available again
++ */
++ vif_state->hooks = NULL;
++
++ netif_tx_unlock_bh(vif_state->np->netdev);
++ netif_poll_enable(vif_state->np->netdev);
++}
++
++
++/*
++ * Safely remove the accelerator function hooks from a netfront state.
++ */
++static void accelerator_remove_hooks(struct netfront_accelerator *accelerator)
++{
++ struct netfront_accel_hooks *hooks;
++ struct netfront_accel_vif_state *vif_state, *tmp;
++ unsigned long flags;
++
++ /* Mutex is held so don't need vif_states_lock to iterate list */
++ list_for_each_entry_safe(vif_state, tmp,
++ &accelerator->vif_states,
++ link) {
++ spin_lock_irqsave(&accelerator->vif_states_lock, flags);
++
++ if(vif_state->hooks) {
++ hooks = vif_state->hooks;
++
++ /* Last chance to get statistics from the accelerator */
++ hooks->get_stats(vif_state->np->netdev,
++ &vif_state->np->stats);
++
++ spin_unlock_irqrestore(&accelerator->vif_states_lock,
++ flags);
++
++ accelerator_remove_single_hook(accelerator, vif_state);
++
++ accelerator->hooks->remove(vif_state->dev);
++ } else {
++ spin_unlock_irqrestore(&accelerator->vif_states_lock,
++ flags);
++ }
++ }
++
++ accelerator->hooks = NULL;
++}
++
++
++/*
++ * Called by a netfront accelerator when it is unloaded. This safely
++ * removes the hooks into the plugin and blocks until all devices have
++ * finished using it, so on return it is safe to unload.
++ */
++void netfront_accelerator_stop(const char *frontend)
++{
++ struct netfront_accelerator *accelerator;
++ unsigned long flags;
++
++ mutex_lock(&accelerator_mutex);
++ spin_lock_irqsave(&accelerators_lock, flags);
++
++ list_for_each_entry(accelerator, &accelerators_list, link) {
++ if (match_accelerator(frontend, accelerator)) {
++ spin_unlock_irqrestore(&accelerators_lock, flags);
++
++ accelerator_remove_hooks(accelerator);
++
++ goto out;
++ }
++ }
++ spin_unlock_irqrestore(&accelerators_lock, flags);
++ out:
++ mutex_unlock(&accelerator_mutex);
++}
++EXPORT_SYMBOL_GPL(netfront_accelerator_stop);
++
++
++/* Helper for call_remove and do_suspend */
++static int do_remove(struct netfront_info *np, struct xenbus_device *dev,
++ unsigned long *lock_flags)
++{
++ struct netfront_accelerator *accelerator = np->accelerator;
++ struct netfront_accel_hooks *hooks;
++ int rc = 0;
++
++ if (np->accel_vif_state.hooks) {
++ hooks = np->accel_vif_state.hooks;
++
++ /* Last chance to get statistics from the accelerator */
++ hooks->get_stats(np->netdev, &np->stats);
++
++ spin_unlock_irqrestore(&accelerator->vif_states_lock,
++ *lock_flags);
++
++ /*
++ * Try and do the opposite of accelerator_probe_new_vif
++ * to ensure there's no state pointing back at the
++ * netdev
++ */
++ accelerator_remove_single_hook(accelerator,
++ &np->accel_vif_state);
++
++ rc = accelerator->hooks->remove(dev);
++
++ spin_lock_irqsave(&accelerator->vif_states_lock, *lock_flags);
++ }
++
++ return rc;
++}
++
++
++static int netfront_remove_accelerator(struct netfront_info *np,
++ struct xenbus_device *dev)
++{
++ struct netfront_accelerator *accelerator;
++ struct netfront_accel_vif_state *tmp_vif_state;
++ unsigned long flags;
++ int rc = 0;
++
++ /* Check that we've got a device that was accelerated */
++ if (np->accelerator == NULL)
++ return rc;
++
++ accelerator = np->accelerator;
++
++ spin_lock_irqsave(&accelerator->vif_states_lock, flags);
++
++ list_for_each_entry(tmp_vif_state, &accelerator->vif_states,
++ link) {
++ if (tmp_vif_state == &np->accel_vif_state) {
++ list_del(&np->accel_vif_state.link);
++ break;
++ }
++ }
++
++ rc = do_remove(np, dev, &flags);
++
++ np->accelerator = NULL;
++
++ spin_unlock_irqrestore(&accelerator->vif_states_lock, flags);
++
++ return rc;
++}
++
++
++int netfront_accelerator_call_remove(struct netfront_info *np,
++ struct xenbus_device *dev)
++{
++ int rc;
++ netfront_accelerator_remove_watch(np);
++ mutex_lock(&accelerator_mutex);
++ rc = netfront_remove_accelerator(np, dev);
++ mutex_unlock(&accelerator_mutex);
++ return rc;
++}
++
++
++int netfront_accelerator_suspend(struct netfront_info *np,
++ struct xenbus_device *dev)
++{
++ unsigned long flags;
++ int rc = 0;
++
++ netfront_accelerator_remove_watch(np);
++
++ mutex_lock(&accelerator_mutex);
++
++ /* Check that we've got a device that was accelerated */
++ if (np->accelerator == NULL)
++ goto out;
++
++ /*
++ * Call the remove accelerator hook, but leave the vif_state
++ * on the accelerator's list in case there is a suspend_cancel.
++ */
++ spin_lock_irqsave(&np->accelerator->vif_states_lock, flags);
++
++ rc = do_remove(np, dev, &flags);
++
++ spin_unlock_irqrestore(&np->accelerator->vif_states_lock, flags);
++ out:
++ mutex_unlock(&accelerator_mutex);
++ return rc;
++}
++
++
++int netfront_accelerator_suspend_cancel(struct netfront_info *np,
++ struct xenbus_device *dev)
++{
++ /*
++ * Setting the watch will cause it to fire and probe the
++ * accelerator, so no need to call accelerator_probe_new_vif()
++ * directly here
++ */
++ if (dev->state == XenbusStateConnected)
++ netfront_accelerator_add_watch(np);
++ return 0;
++}
++
++
++void netfront_accelerator_resume(struct netfront_info *np,
++ struct xenbus_device *dev)
++{
++ struct netfront_accel_vif_state *accel_vif_state = NULL;
++ spinlock_t *vif_states_lock;
++ unsigned long flags;
++
++ mutex_lock(&accelerator_mutex);
++
++ /* Check that we've got a device that was accelerated */
++ if(np->accelerator == NULL)
++ goto out;
++
++ /* Find the vif_state from the accelerator's list */
++ list_for_each_entry(accel_vif_state, &np->accelerator->vif_states,
++ link) {
++ if (accel_vif_state->dev == dev) {
++ BUG_ON(accel_vif_state != &np->accel_vif_state);
++
++ vif_states_lock = &np->accelerator->vif_states_lock;
++ spin_lock_irqsave(vif_states_lock, flags);
++
++ /*
++ * Remove it from the accelerator's list so
++ * state is consistent for probing new vifs
++ * when they get connected
++ */
++ list_del(&accel_vif_state->link);
++ np->accelerator = NULL;
++
++ spin_unlock_irqrestore(vif_states_lock, flags);
++
++ break;
++ }
++ }
++
++ out:
++ mutex_unlock(&accelerator_mutex);
++ return;
++}
++
++
++int netfront_check_accelerator_queue_ready(struct net_device *dev,
++ struct netfront_info *np)
++{
++ struct netfront_accelerator *accelerator;
++ struct netfront_accel_hooks *hooks;
++ int rc = 1;
++ unsigned long flags;
++
++ accelerator = np->accelerator;
++
++ /* Call the check_ready accelerator hook. */
++ if (np->accel_vif_state.hooks && accelerator) {
++ spin_lock_irqsave(&accelerator->vif_states_lock, flags);
++ hooks = np->accel_vif_state.hooks;
++ if (hooks && np->accelerator == accelerator)
++ rc = np->accel_vif_state.hooks->check_ready(dev);
++ spin_unlock_irqrestore(&accelerator->vif_states_lock, flags);
++ }
++
++ return rc;
++}
++
++
++void netfront_accelerator_call_stop_napi_irq(struct netfront_info *np,
++ struct net_device *dev)
++{
++ struct netfront_accelerator *accelerator;
++ struct netfront_accel_hooks *hooks;
++ unsigned long flags;
++
++ accelerator = np->accelerator;
++
++ /* Call the stop_napi_interrupts accelerator hook. */
++ if (np->accel_vif_state.hooks && accelerator != NULL) {
++ spin_lock_irqsave(&accelerator->vif_states_lock, flags);
++ hooks = np->accel_vif_state.hooks;
++ if (hooks && np->accelerator == accelerator)
++ np->accel_vif_state.hooks->stop_napi_irq(dev);
++ spin_unlock_irqrestore(&accelerator->vif_states_lock, flags);
++ }
++}
++
++
++int netfront_accelerator_call_get_stats(struct netfront_info *np,
++ struct net_device *dev)
++{
++ struct netfront_accelerator *accelerator;
++ struct netfront_accel_hooks *hooks;
++ unsigned long flags;
++ int rc = 0;
++
++ accelerator = np->accelerator;
++
++ /* Call the get_stats accelerator hook. */
++ if (np->accel_vif_state.hooks && accelerator != NULL) {
++ spin_lock_irqsave(&accelerator->vif_states_lock, flags);
++ hooks = np->accel_vif_state.hooks;
++ if (hooks && np->accelerator == accelerator)
++ rc = np->accel_vif_state.hooks->get_stats(dev,
++ &np->stats);
++ spin_unlock_irqrestore(&accelerator->vif_states_lock, flags);
++ }
++ return rc;
++}
++
+Index: head-2008-11-25/drivers/xen/netfront/netfront.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netfront/netfront.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,2240 @@
++/******************************************************************************
++ * Virtual network driver for conversing with remote driver backends.
++ *
++ * Copyright (c) 2002-2005, K A Fraser
++ * Copyright (c) 2005, XenSource Ltd
++ * Copyright (C) 2007 Solarflare Communications, Inc.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/module.h>
++#include <linux/version.h>
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/string.h>
++#include <linux/errno.h>
++#include <linux/netdevice.h>
++#include <linux/inetdevice.h>
++#include <linux/etherdevice.h>
++#include <linux/skbuff.h>
++#include <linux/init.h>
++#include <linux/bitops.h>
++#include <linux/ethtool.h>
++#include <linux/in.h>
++#include <linux/if_ether.h>
++#include <linux/io.h>
++#include <linux/moduleparam.h>
++#include <net/sock.h>
++#include <net/pkt_sched.h>
++#include <net/arp.h>
++#include <net/route.h>
++#include <asm/uaccess.h>
++#include <xen/evtchn.h>
++#include <xen/xenbus.h>
++#include <xen/interface/io/netif.h>
++#include <xen/interface/memory.h>
++#include <xen/balloon.h>
++#include <asm/page.h>
++#include <asm/maddr.h>
++#include <asm/uaccess.h>
++#include <xen/interface/grant_table.h>
++#include <xen/gnttab.h>
++
++struct netfront_cb {
++ struct page *page;
++ unsigned offset;
++};
++
++#define NETFRONT_SKB_CB(skb) ((struct netfront_cb *)((skb)->cb))
++
++#include "netfront.h"
++
++/*
++ * Mutually-exclusive module options to select receive data path:
++ * rx_copy : Packets are copied by network backend into local memory
++ * rx_flip : Page containing packet data is transferred to our ownership
++ * For fully-virtualised guests there is no option - copying must be used.
++ * For paravirtualised guests, flipping is the default.
++ */
++#ifdef CONFIG_XEN
++static int MODPARM_rx_copy = 0;
++module_param_named(rx_copy, MODPARM_rx_copy, bool, 0);
++MODULE_PARM_DESC(rx_copy, "Copy packets from network card (rather than flip)");
++static int MODPARM_rx_flip = 0;
++module_param_named(rx_flip, MODPARM_rx_flip, bool, 0);
++MODULE_PARM_DESC(rx_flip, "Flip packets from network card (rather than copy)");
++#else
++static const int MODPARM_rx_copy = 1;
++static const int MODPARM_rx_flip = 0;
++#endif
++
++#define RX_COPY_THRESHOLD 256
++
++/* If we don't have GSO, fake things up so that we never try to use it. */
++#if defined(NETIF_F_GSO)
++#define HAVE_GSO 1
++#define HAVE_TSO 1 /* TSO is a subset of GSO */
++#define HAVE_CSUM_OFFLOAD 1
++static inline void dev_disable_gso_features(struct net_device *dev)
++{
++ /* Turn off all GSO bits except ROBUST. */
++ dev->features &= (1 << NETIF_F_GSO_SHIFT) - 1;
++ dev->features |= NETIF_F_GSO_ROBUST;
++}
++#elif defined(NETIF_F_TSO)
++#define HAVE_GSO 0
++#define HAVE_TSO 1
++
++/* Some older kernels cannot cope with incorrect checksums,
++ * particularly in netfilter. I'm not sure there is 100% correlation
++ * with the presence of NETIF_F_TSO but it appears to be a good first
++ * approximiation.
++ */
++#define HAVE_CSUM_OFFLOAD 0
++
++#define gso_size tso_size
++#define gso_segs tso_segs
++static inline void dev_disable_gso_features(struct net_device *dev)
++{
++ /* Turn off all TSO bits. */
++ dev->features &= ~NETIF_F_TSO;
++}
++static inline int skb_is_gso(const struct sk_buff *skb)
++{
++ return skb_shinfo(skb)->tso_size;
++}
++static inline int skb_gso_ok(struct sk_buff *skb, int features)
++{
++ return (features & NETIF_F_TSO);
++}
++
++static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
++{
++ return skb_is_gso(skb) &&
++ (!skb_gso_ok(skb, dev->features) ||
++ unlikely(skb->ip_summed != CHECKSUM_HW));
++}
++#else
++#define HAVE_GSO 0
++#define HAVE_TSO 0
++#define HAVE_CSUM_OFFLOAD 0
++#define netif_needs_gso(dev, skb) 0
++#define dev_disable_gso_features(dev) ((void)0)
++#define ethtool_op_set_tso(dev, data) (-ENOSYS)
++#endif
++
++#define GRANT_INVALID_REF 0
++
++struct netfront_rx_info {
++ struct netif_rx_response rx;
++ struct netif_extra_info extras[XEN_NETIF_EXTRA_TYPE_MAX - 1];
++};
++
++/*
++ * Implement our own carrier flag: the network stack's version causes delays
++ * when the carrier is re-enabled (in particular, dev_activate() may not
++ * immediately be called, which can cause packet loss).
++ */
++#define netfront_carrier_on(netif) ((netif)->carrier = 1)
++#define netfront_carrier_off(netif) ((netif)->carrier = 0)
++#define netfront_carrier_ok(netif) ((netif)->carrier)
++
++/*
++ * Access macros for acquiring freeing slots in tx_skbs[].
++ */
++
++static inline void add_id_to_freelist(struct sk_buff **list, unsigned short id)
++{
++ list[id] = list[0];
++ list[0] = (void *)(unsigned long)id;
++}
++
++static inline unsigned short get_id_from_freelist(struct sk_buff **list)
++{
++ unsigned int id = (unsigned int)(unsigned long)list[0];
++ list[0] = list[id];
++ return id;
++}
++
++static inline int xennet_rxidx(RING_IDX idx)
++{
++ return idx & (NET_RX_RING_SIZE - 1);
++}
++
++static inline struct sk_buff *xennet_get_rx_skb(struct netfront_info *np,
++ RING_IDX ri)
++{
++ int i = xennet_rxidx(ri);
++ struct sk_buff *skb = np->rx_skbs[i];
++ np->rx_skbs[i] = NULL;
++ return skb;
++}
++
++static inline grant_ref_t xennet_get_rx_ref(struct netfront_info *np,
++ RING_IDX ri)
++{
++ int i = xennet_rxidx(ri);
++ grant_ref_t ref = np->grant_rx_ref[i];
++ np->grant_rx_ref[i] = GRANT_INVALID_REF;
++ return ref;
++}
++
++#define DPRINTK(fmt, args...) \
++ pr_debug("netfront (%s:%d) " fmt, \
++ __FUNCTION__, __LINE__, ##args)
++#define IPRINTK(fmt, args...) \
++ printk(KERN_INFO "netfront: " fmt, ##args)
++#define WPRINTK(fmt, args...) \
++ printk(KERN_WARNING "netfront: " fmt, ##args)
++
++static int setup_device(struct xenbus_device *, struct netfront_info *);
++static struct net_device *create_netdev(struct xenbus_device *);
++
++static void end_access(int, void *);
++static void netif_disconnect_backend(struct netfront_info *);
++
++static int network_connect(struct net_device *);
++static void network_tx_buf_gc(struct net_device *);
++static void network_alloc_rx_buffers(struct net_device *);
++static void send_fake_arp(struct net_device *);
++
++static irqreturn_t netif_int(int irq, void *dev_id, struct pt_regs *ptregs);
++
++#ifdef CONFIG_SYSFS
++static int xennet_sysfs_addif(struct net_device *netdev);
++static void xennet_sysfs_delif(struct net_device *netdev);
++#else /* !CONFIG_SYSFS */
++#define xennet_sysfs_addif(dev) (0)
++#define xennet_sysfs_delif(dev) do { } while(0)
++#endif
++
++static inline int xennet_can_sg(struct net_device *dev)
++{
++ return dev->features & NETIF_F_SG;
++}
++
++/**
++ * Entry point to this code when a new device is created. Allocate the basic
++ * structures and the ring buffers for communication with the backend, and
++ * inform the backend of the appropriate details for those.
++ */
++static int __devinit netfront_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int err;
++ struct net_device *netdev;
++ struct netfront_info *info;
++
++ netdev = create_netdev(dev);
++ if (IS_ERR(netdev)) {
++ err = PTR_ERR(netdev);
++ xenbus_dev_fatal(dev, err, "creating netdev");
++ return err;
++ }
++
++ info = netdev_priv(netdev);
++ dev->dev.driver_data = info;
++
++ err = register_netdev(info->netdev);
++ if (err) {
++ printk(KERN_WARNING "%s: register_netdev err=%d\n",
++ __FUNCTION__, err);
++ goto fail;
++ }
++
++ err = xennet_sysfs_addif(info->netdev);
++ if (err) {
++ unregister_netdev(info->netdev);
++ printk(KERN_WARNING "%s: add sysfs failed err=%d\n",
++ __FUNCTION__, err);
++ goto fail;
++ }
++
++ return 0;
++
++ fail:
++ free_netdev(netdev);
++ dev->dev.driver_data = NULL;
++ return err;
++}
++
++static int __devexit netfront_remove(struct xenbus_device *dev)
++{
++ struct netfront_info *info = dev->dev.driver_data;
++
++ DPRINTK("%s\n", dev->nodename);
++
++ netfront_accelerator_call_remove(info, dev);
++
++ netif_disconnect_backend(info);
++
++ del_timer_sync(&info->rx_refill_timer);
++
++ xennet_sysfs_delif(info->netdev);
++
++ unregister_netdev(info->netdev);
++
++ free_netdev(info->netdev);
++
++ return 0;
++}
++
++
++static int netfront_suspend(struct xenbus_device *dev)
++{
++ struct netfront_info *info = dev->dev.driver_data;
++ return netfront_accelerator_suspend(info, dev);
++}
++
++
++static int netfront_suspend_cancel(struct xenbus_device *dev)
++{
++ struct netfront_info *info = dev->dev.driver_data;
++ return netfront_accelerator_suspend_cancel(info, dev);
++}
++
++
++/**
++ * We are reconnecting to the backend, due to a suspend/resume, or a backend
++ * driver restart. We tear down our netif structure and recreate it, but
++ * leave the device-layer structures intact so that this is transparent to the
++ * rest of the kernel.
++ */
++static int netfront_resume(struct xenbus_device *dev)
++{
++ struct netfront_info *info = dev->dev.driver_data;
++
++ DPRINTK("%s\n", dev->nodename);
++
++ netfront_accelerator_resume(info, dev);
++
++ netif_disconnect_backend(info);
++ return 0;
++}
++
++static int xen_net_read_mac(struct xenbus_device *dev, u8 mac[])
++{
++ char *s, *e, *macstr;
++ int i;
++
++ macstr = s = xenbus_read(XBT_NIL, dev->nodename, "mac", NULL);
++ if (IS_ERR(macstr))
++ return PTR_ERR(macstr);
++
++ for (i = 0; i < ETH_ALEN; i++) {
++ mac[i] = simple_strtoul(s, &e, 16);
++ if ((s == e) || (*e != ((i == ETH_ALEN-1) ? '\0' : ':'))) {
++ kfree(macstr);
++ return -ENOENT;
++ }
++ s = e+1;
++ }
++
++ kfree(macstr);
++ return 0;
++}
++
++/* Common code used when first setting up, and when resuming. */
++static int talk_to_backend(struct xenbus_device *dev,
++ struct netfront_info *info)
++{
++ const char *message;
++ struct xenbus_transaction xbt;
++ int err;
++
++ /* Read mac only in the first setup. */
++ if (!is_valid_ether_addr(info->mac)) {
++ err = xen_net_read_mac(dev, info->mac);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "parsing %s/mac",
++ dev->nodename);
++ goto out;
++ }
++ }
++
++ /* Create shared ring, alloc event channel. */
++ err = setup_device(dev, info);
++ if (err)
++ goto out;
++
++ /* This will load an accelerator if one is configured when the
++ * watch fires */
++ netfront_accelerator_add_watch(info);
++
++again:
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "starting transaction");
++ goto destroy_ring;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "tx-ring-ref","%u",
++ info->tx_ring_ref);
++ if (err) {
++ message = "writing tx ring-ref";
++ goto abort_transaction;
++ }
++ err = xenbus_printf(xbt, dev->nodename, "rx-ring-ref","%u",
++ info->rx_ring_ref);
++ if (err) {
++ message = "writing rx ring-ref";
++ goto abort_transaction;
++ }
++ err = xenbus_printf(xbt, dev->nodename,
++ "event-channel", "%u",
++ irq_to_evtchn_port(info->irq));
++ if (err) {
++ message = "writing event-channel";
++ goto abort_transaction;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "request-rx-copy", "%u",
++ info->copying_receiver);
++ if (err) {
++ message = "writing request-rx-copy";
++ goto abort_transaction;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "feature-rx-notify", "%d", 1);
++ if (err) {
++ message = "writing feature-rx-notify";
++ goto abort_transaction;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "feature-no-csum-offload",
++ "%d", !HAVE_CSUM_OFFLOAD);
++ if (err) {
++ message = "writing feature-no-csum-offload";
++ goto abort_transaction;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "feature-sg", "%d", 1);
++ if (err) {
++ message = "writing feature-sg";
++ goto abort_transaction;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv4", "%d",
++ HAVE_TSO);
++ if (err) {
++ message = "writing feature-gso-tcpv4";
++ goto abort_transaction;
++ }
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err) {
++ if (err == -EAGAIN)
++ goto again;
++ xenbus_dev_fatal(dev, err, "completing transaction");
++ goto destroy_ring;
++ }
++
++ return 0;
++
++ abort_transaction:
++ xenbus_transaction_end(xbt, 1);
++ xenbus_dev_fatal(dev, err, "%s", message);
++ destroy_ring:
++ netfront_accelerator_call_remove(info, dev);
++ netif_disconnect_backend(info);
++ out:
++ return err;
++}
++
++static int setup_device(struct xenbus_device *dev, struct netfront_info *info)
++{
++ struct netif_tx_sring *txs;
++ struct netif_rx_sring *rxs;
++ int err;
++ struct net_device *netdev = info->netdev;
++
++ info->tx_ring_ref = GRANT_INVALID_REF;
++ info->rx_ring_ref = GRANT_INVALID_REF;
++ info->rx.sring = NULL;
++ info->tx.sring = NULL;
++ info->irq = 0;
++
++ txs = (struct netif_tx_sring *)get_zeroed_page(GFP_NOIO | __GFP_HIGH);
++ if (!txs) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(dev, err, "allocating tx ring page");
++ goto fail;
++ }
++ SHARED_RING_INIT(txs);
++ FRONT_RING_INIT(&info->tx, txs, PAGE_SIZE);
++
++ err = xenbus_grant_ring(dev, virt_to_mfn(txs));
++ if (err < 0) {
++ free_page((unsigned long)txs);
++ goto fail;
++ }
++ info->tx_ring_ref = err;
++
++ rxs = (struct netif_rx_sring *)get_zeroed_page(GFP_NOIO | __GFP_HIGH);
++ if (!rxs) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(dev, err, "allocating rx ring page");
++ goto fail;
++ }
++ SHARED_RING_INIT(rxs);
++ FRONT_RING_INIT(&info->rx, rxs, PAGE_SIZE);
++
++ err = xenbus_grant_ring(dev, virt_to_mfn(rxs));
++ if (err < 0) {
++ free_page((unsigned long)rxs);
++ goto fail;
++ }
++ info->rx_ring_ref = err;
++
++ memcpy(netdev->dev_addr, info->mac, ETH_ALEN);
++
++ err = bind_listening_port_to_irqhandler(
++ dev->otherend_id, netif_int, SA_SAMPLE_RANDOM, netdev->name,
++ netdev);
++ if (err < 0)
++ goto fail;
++ info->irq = err;
++
++ return 0;
++
++ fail:
++ return err;
++}
++
++/**
++ * Callback received when the backend's state changes.
++ */
++static void backend_changed(struct xenbus_device *dev,
++ enum xenbus_state backend_state)
++{
++ struct netfront_info *np = dev->dev.driver_data;
++ struct net_device *netdev = np->netdev;
++
++ DPRINTK("%s\n", xenbus_strstate(backend_state));
++
++ switch (backend_state) {
++ case XenbusStateInitialising:
++ case XenbusStateInitialised:
++ case XenbusStateConnected:
++ case XenbusStateReconfiguring:
++ case XenbusStateReconfigured:
++ case XenbusStateUnknown:
++ case XenbusStateClosed:
++ break;
++
++ case XenbusStateInitWait:
++ if (dev->state != XenbusStateInitialising)
++ break;
++ if (network_connect(netdev) != 0)
++ break;
++ xenbus_switch_state(dev, XenbusStateConnected);
++ send_fake_arp(netdev);
++ break;
++
++ case XenbusStateClosing:
++ xenbus_frontend_closed(dev);
++ break;
++ }
++}
++
++/** Send a packet on a net device to encourage switches to learn the
++ * MAC. We send a fake ARP request.
++ *
++ * @param dev device
++ * @return 0 on success, error code otherwise
++ */
++static void send_fake_arp(struct net_device *dev)
++{
++#ifdef CONFIG_INET
++ struct sk_buff *skb;
++ u32 src_ip, dst_ip;
++
++ dst_ip = INADDR_BROADCAST;
++ src_ip = inet_select_addr(dev, dst_ip, RT_SCOPE_LINK);
++
++ /* No IP? Then nothing to do. */
++ if (src_ip == 0)
++ return;
++
++ skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
++ dst_ip, dev, src_ip,
++ /*dst_hw*/ NULL, /*src_hw*/ NULL,
++ /*target_hw*/ dev->dev_addr);
++ if (skb == NULL)
++ return;
++
++ dev_queue_xmit(skb);
++#endif
++}
++
++static inline int netfront_tx_slot_available(struct netfront_info *np)
++{
++ return ((np->tx.req_prod_pvt - np->tx.rsp_cons) <
++ (TX_MAX_TARGET - MAX_SKB_FRAGS - 2));
++}
++
++
++static inline void network_maybe_wake_tx(struct net_device *dev)
++{
++ struct netfront_info *np = netdev_priv(dev);
++
++ if (unlikely(netif_queue_stopped(dev)) &&
++ netfront_tx_slot_available(np) &&
++ likely(netif_running(dev)) &&
++ netfront_check_accelerator_queue_ready(dev, np))
++ netif_wake_queue(dev);
++}
++
++
++int netfront_check_queue_ready(struct net_device *dev)
++{
++ struct netfront_info *np = netdev_priv(dev);
++
++ return unlikely(netif_queue_stopped(dev)) &&
++ netfront_tx_slot_available(np) &&
++ likely(netif_running(dev));
++}
++EXPORT_SYMBOL(netfront_check_queue_ready);
++
++
++static int network_open(struct net_device *dev)
++{
++ struct netfront_info *np = netdev_priv(dev);
++
++ memset(&np->stats, 0, sizeof(np->stats));
++
++ spin_lock_bh(&np->rx_lock);
++ if (netfront_carrier_ok(np)) {
++ network_alloc_rx_buffers(dev);
++ np->rx.sring->rsp_event = np->rx.rsp_cons + 1;
++ if (RING_HAS_UNCONSUMED_RESPONSES(&np->rx)){
++ netfront_accelerator_call_stop_napi_irq(np, dev);
++
++ netif_rx_schedule(dev);
++ }
++ }
++ spin_unlock_bh(&np->rx_lock);
++
++ network_maybe_wake_tx(dev);
++
++ return 0;
++}
++
++static void network_tx_buf_gc(struct net_device *dev)
++{
++ RING_IDX cons, prod;
++ unsigned short id;
++ struct netfront_info *np = netdev_priv(dev);
++ struct sk_buff *skb;
++
++ BUG_ON(!netfront_carrier_ok(np));
++
++ do {
++ prod = np->tx.sring->rsp_prod;
++ rmb(); /* Ensure we see responses up to 'rp'. */
++
++ for (cons = np->tx.rsp_cons; cons != prod; cons++) {
++ struct netif_tx_response *txrsp;
++
++ txrsp = RING_GET_RESPONSE(&np->tx, cons);
++ if (txrsp->status == NETIF_RSP_NULL)
++ continue;
++
++ id = txrsp->id;
++ skb = np->tx_skbs[id];
++ if (unlikely(gnttab_query_foreign_access(
++ np->grant_tx_ref[id]) != 0)) {
++ printk(KERN_ALERT "network_tx_buf_gc: warning "
++ "-- grant still in use by backend "
++ "domain.\n");
++ BUG();
++ }
++ gnttab_end_foreign_access_ref(np->grant_tx_ref[id]);
++ gnttab_release_grant_reference(
++ &np->gref_tx_head, np->grant_tx_ref[id]);
++ np->grant_tx_ref[id] = GRANT_INVALID_REF;
++ add_id_to_freelist(np->tx_skbs, id);
++ dev_kfree_skb_irq(skb);
++ }
++
++ np->tx.rsp_cons = prod;
++
++ /*
++ * Set a new event, then check for race with update of tx_cons.
++ * Note that it is essential to schedule a callback, no matter
++ * how few buffers are pending. Even if there is space in the
++ * transmit ring, higher layers may be blocked because too much
++ * data is outstanding: in such cases notification from Xen is
++ * likely to be the only kick that we'll get.
++ */
++ np->tx.sring->rsp_event =
++ prod + ((np->tx.sring->req_prod - prod) >> 1) + 1;
++ mb();
++ } while ((cons == prod) && (prod != np->tx.sring->rsp_prod));
++
++ network_maybe_wake_tx(dev);
++}
++
++static void rx_refill_timeout(unsigned long data)
++{
++ struct net_device *dev = (struct net_device *)data;
++ struct netfront_info *np = netdev_priv(dev);
++
++ netfront_accelerator_call_stop_napi_irq(np, dev);
++
++ netif_rx_schedule(dev);
++}
++
++static void network_alloc_rx_buffers(struct net_device *dev)
++{
++ unsigned short id;
++ struct netfront_info *np = netdev_priv(dev);
++ struct sk_buff *skb;
++ struct page *page;
++ int i, batch_target, notify;
++ RING_IDX req_prod = np->rx.req_prod_pvt;
++ struct xen_memory_reservation reservation;
++ grant_ref_t ref;
++ unsigned long pfn;
++ void *vaddr;
++ int nr_flips;
++ netif_rx_request_t *req;
++
++ if (unlikely(!netfront_carrier_ok(np)))
++ return;
++
++ /*
++ * Allocate skbuffs greedily, even though we batch updates to the
++ * receive ring. This creates a less bursty demand on the memory
++ * allocator, so should reduce the chance of failed allocation requests
++ * both for ourself and for other kernel subsystems.
++ */
++ batch_target = np->rx_target - (req_prod - np->rx.rsp_cons);
++ for (i = skb_queue_len(&np->rx_batch); i < batch_target; i++) {
++ /*
++ * Allocate an skb and a page. Do not use __dev_alloc_skb as
++ * that will allocate page-sized buffers which is not
++ * necessary here.
++ * 16 bytes added as necessary headroom for netif_receive_skb.
++ */
++ skb = alloc_skb(RX_COPY_THRESHOLD + 16 + NET_IP_ALIGN,
++ GFP_ATOMIC | __GFP_NOWARN);
++ if (unlikely(!skb))
++ goto no_skb;
++
++ page = alloc_page(GFP_ATOMIC | __GFP_NOWARN);
++ if (!page) {
++ kfree_skb(skb);
++no_skb:
++ /* Any skbuffs queued for refill? Force them out. */
++ if (i != 0)
++ goto refill;
++ /* Could not allocate any skbuffs. Try again later. */
++ mod_timer(&np->rx_refill_timer,
++ jiffies + (HZ/10));
++ break;
++ }
++
++ skb_reserve(skb, 16 + NET_IP_ALIGN); /* mimic dev_alloc_skb() */
++ skb_shinfo(skb)->frags[0].page = page;
++ skb_shinfo(skb)->nr_frags = 1;
++ __skb_queue_tail(&np->rx_batch, skb);
++ }
++
++ /* Is the batch large enough to be worthwhile? */
++ if (i < (np->rx_target/2)) {
++ if (req_prod > np->rx.sring->req_prod)
++ goto push;
++ return;
++ }
++
++ /* Adjust our fill target if we risked running out of buffers. */
++ if (((req_prod - np->rx.sring->rsp_prod) < (np->rx_target / 4)) &&
++ ((np->rx_target *= 2) > np->rx_max_target))
++ np->rx_target = np->rx_max_target;
++
++ refill:
++ for (nr_flips = i = 0; ; i++) {
++ if ((skb = __skb_dequeue(&np->rx_batch)) == NULL)
++ break;
++
++ skb->dev = dev;
++
++ id = xennet_rxidx(req_prod + i);
++
++ BUG_ON(np->rx_skbs[id]);
++ np->rx_skbs[id] = skb;
++
++ ref = gnttab_claim_grant_reference(&np->gref_rx_head);
++ BUG_ON((signed short)ref < 0);
++ np->grant_rx_ref[id] = ref;
++
++ pfn = page_to_pfn(skb_shinfo(skb)->frags[0].page);
++ vaddr = page_address(skb_shinfo(skb)->frags[0].page);
++
++ req = RING_GET_REQUEST(&np->rx, req_prod + i);
++ if (!np->copying_receiver) {
++ gnttab_grant_foreign_transfer_ref(ref,
++ np->xbdev->otherend_id,
++ pfn);
++ np->rx_pfn_array[nr_flips] = pfn_to_mfn(pfn);
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ /* Remove this page before passing
++ * back to Xen. */
++ set_phys_to_machine(pfn, INVALID_P2M_ENTRY);
++ MULTI_update_va_mapping(np->rx_mcl+i,
++ (unsigned long)vaddr,
++ __pte(0), 0);
++ }
++ nr_flips++;
++ } else {
++ gnttab_grant_foreign_access_ref(ref,
++ np->xbdev->otherend_id,
++ pfn_to_mfn(pfn),
++ 0);
++ }
++
++ req->id = id;
++ req->gref = ref;
++ }
++
++ if ( nr_flips != 0 ) {
++ /* Tell the ballon driver what is going on. */
++ balloon_update_driver_allowance(i);
++
++ set_xen_guest_handle(reservation.extent_start,
++ np->rx_pfn_array);
++ reservation.nr_extents = nr_flips;
++ reservation.extent_order = 0;
++ reservation.address_bits = 0;
++ reservation.domid = DOMID_SELF;
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ /* After all PTEs have been zapped, flush the TLB. */
++ np->rx_mcl[i-1].args[MULTI_UVMFLAGS_INDEX] =
++ UVMF_TLB_FLUSH|UVMF_ALL;
++
++ /* Give away a batch of pages. */
++ np->rx_mcl[i].op = __HYPERVISOR_memory_op;
++ np->rx_mcl[i].args[0] = XENMEM_decrease_reservation;
++ np->rx_mcl[i].args[1] = (unsigned long)&reservation;
++
++ /* Zap PTEs and give away pages in one big
++ * multicall. */
++ if (unlikely(HYPERVISOR_multicall(np->rx_mcl, i+1)))
++ BUG();
++
++ /* Check return status of HYPERVISOR_memory_op(). */
++ if (unlikely(np->rx_mcl[i].result != i))
++ panic("Unable to reduce memory reservation\n");
++ while (nr_flips--)
++ BUG_ON(np->rx_mcl[nr_flips].result);
++ } else {
++ if (HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &reservation) != i)
++ panic("Unable to reduce memory reservation\n");
++ }
++ } else {
++ wmb();
++ }
++
++ /* Above is a suitable barrier to ensure backend will see requests. */
++ np->rx.req_prod_pvt = req_prod + i;
++ push:
++ RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&np->rx, notify);
++ if (notify)
++ notify_remote_via_irq(np->irq);
++}
++
++static void xennet_make_frags(struct sk_buff *skb, struct net_device *dev,
++ struct netif_tx_request *tx)
++{
++ struct netfront_info *np = netdev_priv(dev);
++ char *data = skb->data;
++ unsigned long mfn;
++ RING_IDX prod = np->tx.req_prod_pvt;
++ int frags = skb_shinfo(skb)->nr_frags;
++ unsigned int offset = offset_in_page(data);
++ unsigned int len = skb_headlen(skb);
++ unsigned int id;
++ grant_ref_t ref;
++ int i;
++
++ while (len > PAGE_SIZE - offset) {
++ tx->size = PAGE_SIZE - offset;
++ tx->flags |= NETTXF_more_data;
++ len -= tx->size;
++ data += tx->size;
++ offset = 0;
++
++ id = get_id_from_freelist(np->tx_skbs);
++ np->tx_skbs[id] = skb_get(skb);
++ tx = RING_GET_REQUEST(&np->tx, prod++);
++ tx->id = id;
++ ref = gnttab_claim_grant_reference(&np->gref_tx_head);
++ BUG_ON((signed short)ref < 0);
++
++ mfn = virt_to_mfn(data);
++ gnttab_grant_foreign_access_ref(ref, np->xbdev->otherend_id,
++ mfn, GTF_readonly);
++
++ tx->gref = np->grant_tx_ref[id] = ref;
++ tx->offset = offset;
++ tx->size = len;
++ tx->flags = 0;
++ }
++
++ for (i = 0; i < frags; i++) {
++ skb_frag_t *frag = skb_shinfo(skb)->frags + i;
++
++ tx->flags |= NETTXF_more_data;
++
++ id = get_id_from_freelist(np->tx_skbs);
++ np->tx_skbs[id] = skb_get(skb);
++ tx = RING_GET_REQUEST(&np->tx, prod++);
++ tx->id = id;
++ ref = gnttab_claim_grant_reference(&np->gref_tx_head);
++ BUG_ON((signed short)ref < 0);
++
++ mfn = pfn_to_mfn(page_to_pfn(frag->page));
++ gnttab_grant_foreign_access_ref(ref, np->xbdev->otherend_id,
++ mfn, GTF_readonly);
++
++ tx->gref = np->grant_tx_ref[id] = ref;
++ tx->offset = frag->page_offset;
++ tx->size = frag->size;
++ tx->flags = 0;
++ }
++
++ np->tx.req_prod_pvt = prod;
++}
++
++static int network_start_xmit(struct sk_buff *skb, struct net_device *dev)
++{
++ unsigned short id;
++ struct netfront_info *np = netdev_priv(dev);
++ struct netif_tx_request *tx;
++ struct netif_extra_info *extra;
++ char *data = skb->data;
++ RING_IDX i;
++ grant_ref_t ref;
++ unsigned long mfn;
++ int notify;
++ int frags = skb_shinfo(skb)->nr_frags;
++ unsigned int offset = offset_in_page(data);
++ unsigned int len = skb_headlen(skb);
++
++ /* Check the fast path, if hooks are available */
++ if (np->accel_vif_state.hooks &&
++ np->accel_vif_state.hooks->start_xmit(skb, dev)) {
++ /* Fast path has sent this packet */
++ return 0;
++ }
++
++ frags += (offset + len + PAGE_SIZE - 1) / PAGE_SIZE;
++ if (unlikely(frags > MAX_SKB_FRAGS + 1)) {
++ printk(KERN_ALERT "xennet: skb rides the rocket: %d frags\n",
++ frags);
++ dump_stack();
++ goto drop;
++ }
++
++ spin_lock_irq(&np->tx_lock);
++
++ if (unlikely(!netfront_carrier_ok(np) ||
++ (frags > 1 && !xennet_can_sg(dev)) ||
++ netif_needs_gso(dev, skb))) {
++ spin_unlock_irq(&np->tx_lock);
++ goto drop;
++ }
++
++ i = np->tx.req_prod_pvt;
++
++ id = get_id_from_freelist(np->tx_skbs);
++ np->tx_skbs[id] = skb;
++
++ tx = RING_GET_REQUEST(&np->tx, i);
++
++ tx->id = id;
++ ref = gnttab_claim_grant_reference(&np->gref_tx_head);
++ BUG_ON((signed short)ref < 0);
++ mfn = virt_to_mfn(data);
++ gnttab_grant_foreign_access_ref(
++ ref, np->xbdev->otherend_id, mfn, GTF_readonly);
++ tx->gref = np->grant_tx_ref[id] = ref;
++ tx->offset = offset;
++ tx->size = len;
++
++ tx->flags = 0;
++ extra = NULL;
++
++ if (skb->ip_summed == CHECKSUM_HW) /* local packet? */
++ tx->flags |= NETTXF_csum_blank | NETTXF_data_validated;
++#ifdef CONFIG_XEN
++ if (skb->proto_data_valid) /* remote but checksummed? */
++ tx->flags |= NETTXF_data_validated;
++#endif
++
++#if HAVE_TSO
++ if (skb_shinfo(skb)->gso_size) {
++ struct netif_extra_info *gso = (struct netif_extra_info *)
++ RING_GET_REQUEST(&np->tx, ++i);
++
++ if (extra)
++ extra->flags |= XEN_NETIF_EXTRA_FLAG_MORE;
++ else
++ tx->flags |= NETTXF_extra_info;
++
++ gso->u.gso.size = skb_shinfo(skb)->gso_size;
++ gso->u.gso.type = XEN_NETIF_GSO_TYPE_TCPV4;
++ gso->u.gso.pad = 0;
++ gso->u.gso.features = 0;
++
++ gso->type = XEN_NETIF_EXTRA_TYPE_GSO;
++ gso->flags = 0;
++ extra = gso;
++ }
++#endif
++
++ np->tx.req_prod_pvt = i + 1;
++
++ xennet_make_frags(skb, dev, tx);
++ tx->size = skb->len;
++
++ RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&np->tx, notify);
++ if (notify)
++ notify_remote_via_irq(np->irq);
++
++ np->stats.tx_bytes += skb->len;
++ np->stats.tx_packets++;
++ dev->trans_start = jiffies;
++
++ /* Note: It is not safe to access skb after network_tx_buf_gc()! */
++ network_tx_buf_gc(dev);
++
++ if (!netfront_tx_slot_available(np))
++ netif_stop_queue(dev);
++
++ spin_unlock_irq(&np->tx_lock);
++
++ return 0;
++
++ drop:
++ np->stats.tx_dropped++;
++ dev_kfree_skb(skb);
++ return 0;
++}
++
++static irqreturn_t netif_int(int irq, void *dev_id, struct pt_regs *ptregs)
++{
++ struct net_device *dev = dev_id;
++ struct netfront_info *np = netdev_priv(dev);
++ unsigned long flags;
++
++ spin_lock_irqsave(&np->tx_lock, flags);
++
++ if (likely(netfront_carrier_ok(np))) {
++ network_tx_buf_gc(dev);
++ /* Under tx_lock: protects access to rx shared-ring indexes. */
++ if (RING_HAS_UNCONSUMED_RESPONSES(&np->rx)) {
++ netfront_accelerator_call_stop_napi_irq(np, dev);
++
++ netif_rx_schedule(dev);
++ dev->last_rx = jiffies;
++ }
++ }
++
++ spin_unlock_irqrestore(&np->tx_lock, flags);
++
++ return IRQ_HANDLED;
++}
++
++static void xennet_move_rx_slot(struct netfront_info *np, struct sk_buff *skb,
++ grant_ref_t ref)
++{
++ int new = xennet_rxidx(np->rx.req_prod_pvt);
++
++ BUG_ON(np->rx_skbs[new]);
++ np->rx_skbs[new] = skb;
++ np->grant_rx_ref[new] = ref;
++ RING_GET_REQUEST(&np->rx, np->rx.req_prod_pvt)->id = new;
++ RING_GET_REQUEST(&np->rx, np->rx.req_prod_pvt)->gref = ref;
++ np->rx.req_prod_pvt++;
++}
++
++int xennet_get_extras(struct netfront_info *np,
++ struct netif_extra_info *extras, RING_IDX rp)
++
++{
++ struct netif_extra_info *extra;
++ RING_IDX cons = np->rx.rsp_cons;
++ int err = 0;
++
++ do {
++ struct sk_buff *skb;
++ grant_ref_t ref;
++
++ if (unlikely(cons + 1 == rp)) {
++ if (net_ratelimit())
++ WPRINTK("Missing extra info\n");
++ err = -EBADR;
++ break;
++ }
++
++ extra = (struct netif_extra_info *)
++ RING_GET_RESPONSE(&np->rx, ++cons);
++
++ if (unlikely(!extra->type ||
++ extra->type >= XEN_NETIF_EXTRA_TYPE_MAX)) {
++ if (net_ratelimit())
++ WPRINTK("Invalid extra type: %d\n",
++ extra->type);
++ err = -EINVAL;
++ } else {
++ memcpy(&extras[extra->type - 1], extra,
++ sizeof(*extra));
++ }
++
++ skb = xennet_get_rx_skb(np, cons);
++ ref = xennet_get_rx_ref(np, cons);
++ xennet_move_rx_slot(np, skb, ref);
++ } while (extra->flags & XEN_NETIF_EXTRA_FLAG_MORE);
++
++ np->rx.rsp_cons = cons;
++ return err;
++}
++
++static int xennet_get_responses(struct netfront_info *np,
++ struct netfront_rx_info *rinfo, RING_IDX rp,
++ struct sk_buff_head *list,
++ int *pages_flipped_p)
++{
++ int pages_flipped = *pages_flipped_p;
++ struct mmu_update *mmu;
++ struct multicall_entry *mcl;
++ struct netif_rx_response *rx = &rinfo->rx;
++ struct netif_extra_info *extras = rinfo->extras;
++ RING_IDX cons = np->rx.rsp_cons;
++ struct sk_buff *skb = xennet_get_rx_skb(np, cons);
++ grant_ref_t ref = xennet_get_rx_ref(np, cons);
++ int max = MAX_SKB_FRAGS + (rx->status <= RX_COPY_THRESHOLD);
++ int frags = 1;
++ int err = 0;
++ unsigned long ret;
++
++ if (rx->flags & NETRXF_extra_info) {
++ err = xennet_get_extras(np, extras, rp);
++ cons = np->rx.rsp_cons;
++ }
++
++ for (;;) {
++ unsigned long mfn;
++
++ if (unlikely(rx->status < 0 ||
++ rx->offset + rx->status > PAGE_SIZE)) {
++ if (net_ratelimit())
++ WPRINTK("rx->offset: %x, size: %u\n",
++ rx->offset, rx->status);
++ xennet_move_rx_slot(np, skb, ref);
++ err = -EINVAL;
++ goto next;
++ }
++
++ /*
++ * This definitely indicates a bug, either in this driver or in
++ * the backend driver. In future this should flag the bad
++ * situation to the system controller to reboot the backed.
++ */
++ if (ref == GRANT_INVALID_REF) {
++ if (net_ratelimit())
++ WPRINTK("Bad rx response id %d.\n", rx->id);
++ err = -EINVAL;
++ goto next;
++ }
++
++ if (!np->copying_receiver) {
++ /* Memory pressure, insufficient buffer
++ * headroom, ... */
++ if (!(mfn = gnttab_end_foreign_transfer_ref(ref))) {
++ if (net_ratelimit())
++ WPRINTK("Unfulfilled rx req "
++ "(id=%d, st=%d).\n",
++ rx->id, rx->status);
++ xennet_move_rx_slot(np, skb, ref);
++ err = -ENOMEM;
++ goto next;
++ }
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ /* Remap the page. */
++ struct page *page =
++ skb_shinfo(skb)->frags[0].page;
++ unsigned long pfn = page_to_pfn(page);
++ void *vaddr = page_address(page);
++
++ mcl = np->rx_mcl + pages_flipped;
++ mmu = np->rx_mmu + pages_flipped;
++
++ MULTI_update_va_mapping(mcl,
++ (unsigned long)vaddr,
++ pfn_pte_ma(mfn,
++ PAGE_KERNEL),
++ 0);
++ mmu->ptr = ((maddr_t)mfn << PAGE_SHIFT)
++ | MMU_MACHPHYS_UPDATE;
++ mmu->val = pfn;
++
++ set_phys_to_machine(pfn, mfn);
++ }
++ pages_flipped++;
++ } else {
++ ret = gnttab_end_foreign_access_ref(ref);
++ BUG_ON(!ret);
++ }
++
++ gnttab_release_grant_reference(&np->gref_rx_head, ref);
++
++ __skb_queue_tail(list, skb);
++
++next:
++ if (!(rx->flags & NETRXF_more_data))
++ break;
++
++ if (cons + frags == rp) {
++ if (net_ratelimit())
++ WPRINTK("Need more frags\n");
++ err = -ENOENT;
++ break;
++ }
++
++ rx = RING_GET_RESPONSE(&np->rx, cons + frags);
++ skb = xennet_get_rx_skb(np, cons + frags);
++ ref = xennet_get_rx_ref(np, cons + frags);
++ frags++;
++ }
++
++ if (unlikely(frags > max)) {
++ if (net_ratelimit())
++ WPRINTK("Too many frags\n");
++ err = -E2BIG;
++ }
++
++ if (unlikely(err))
++ np->rx.rsp_cons = cons + frags;
++
++ *pages_flipped_p = pages_flipped;
++
++ return err;
++}
++
++static RING_IDX xennet_fill_frags(struct netfront_info *np,
++ struct sk_buff *skb,
++ struct sk_buff_head *list)
++{
++ struct skb_shared_info *shinfo = skb_shinfo(skb);
++ int nr_frags = shinfo->nr_frags;
++ RING_IDX cons = np->rx.rsp_cons;
++ skb_frag_t *frag = shinfo->frags + nr_frags;
++ struct sk_buff *nskb;
++
++ while ((nskb = __skb_dequeue(list))) {
++ struct netif_rx_response *rx =
++ RING_GET_RESPONSE(&np->rx, ++cons);
++
++ frag->page = skb_shinfo(nskb)->frags[0].page;
++ frag->page_offset = rx->offset;
++ frag->size = rx->status;
++
++ skb->data_len += rx->status;
++
++ skb_shinfo(nskb)->nr_frags = 0;
++ kfree_skb(nskb);
++
++ frag++;
++ nr_frags++;
++ }
++
++ shinfo->nr_frags = nr_frags;
++ return cons;
++}
++
++static int xennet_set_skb_gso(struct sk_buff *skb,
++ struct netif_extra_info *gso)
++{
++ if (!gso->u.gso.size) {
++ if (net_ratelimit())
++ WPRINTK("GSO size must not be zero.\n");
++ return -EINVAL;
++ }
++
++ /* Currently only TCPv4 S.O. is supported. */
++ if (gso->u.gso.type != XEN_NETIF_GSO_TYPE_TCPV4) {
++ if (net_ratelimit())
++ WPRINTK("Bad GSO type %d.\n", gso->u.gso.type);
++ return -EINVAL;
++ }
++
++#if HAVE_TSO
++ skb_shinfo(skb)->gso_size = gso->u.gso.size;
++#if HAVE_GSO
++ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
++
++ /* Header must be checked, and gso_segs computed. */
++ skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
++#endif
++ skb_shinfo(skb)->gso_segs = 0;
++
++ return 0;
++#else
++ if (net_ratelimit())
++ WPRINTK("GSO unsupported by this kernel.\n");
++ return -EINVAL;
++#endif
++}
++
++static int netif_poll(struct net_device *dev, int *pbudget)
++{
++ struct netfront_info *np = netdev_priv(dev);
++ struct sk_buff *skb;
++ struct netfront_rx_info rinfo;
++ struct netif_rx_response *rx = &rinfo.rx;
++ struct netif_extra_info *extras = rinfo.extras;
++ RING_IDX i, rp;
++ struct multicall_entry *mcl;
++ int work_done, budget, more_to_do = 1, accel_more_to_do = 1;
++ struct sk_buff_head rxq;
++ struct sk_buff_head errq;
++ struct sk_buff_head tmpq;
++ unsigned long flags;
++ unsigned int len;
++ int pages_flipped = 0;
++ int err;
++
++ spin_lock(&np->rx_lock); /* no need for spin_lock_bh() in ->poll() */
++
++ if (unlikely(!netfront_carrier_ok(np))) {
++ spin_unlock(&np->rx_lock);
++ return 0;
++ }
++
++ skb_queue_head_init(&rxq);
++ skb_queue_head_init(&errq);
++ skb_queue_head_init(&tmpq);
++
++ if ((budget = *pbudget) > dev->quota)
++ budget = dev->quota;
++ rp = np->rx.sring->rsp_prod;
++ rmb(); /* Ensure we see queued responses up to 'rp'. */
++
++ i = np->rx.rsp_cons;
++ work_done = 0;
++ while ((i != rp) && (work_done < budget)) {
++ memcpy(rx, RING_GET_RESPONSE(&np->rx, i), sizeof(*rx));
++ memset(extras, 0, sizeof(rinfo.extras));
++
++ err = xennet_get_responses(np, &rinfo, rp, &tmpq,
++ &pages_flipped);
++
++ if (unlikely(err)) {
++err:
++ while ((skb = __skb_dequeue(&tmpq)))
++ __skb_queue_tail(&errq, skb);
++ np->stats.rx_errors++;
++ i = np->rx.rsp_cons;
++ continue;
++ }
++
++ skb = __skb_dequeue(&tmpq);
++
++ if (extras[XEN_NETIF_EXTRA_TYPE_GSO - 1].type) {
++ struct netif_extra_info *gso;
++ gso = &extras[XEN_NETIF_EXTRA_TYPE_GSO - 1];
++
++ if (unlikely(xennet_set_skb_gso(skb, gso))) {
++ __skb_queue_head(&tmpq, skb);
++ np->rx.rsp_cons += skb_queue_len(&tmpq);
++ goto err;
++ }
++ }
++
++ NETFRONT_SKB_CB(skb)->page = skb_shinfo(skb)->frags[0].page;
++ NETFRONT_SKB_CB(skb)->offset = rx->offset;
++
++ len = rx->status;
++ if (len > RX_COPY_THRESHOLD)
++ len = RX_COPY_THRESHOLD;
++ skb_put(skb, len);
++
++ if (rx->status > len) {
++ skb_shinfo(skb)->frags[0].page_offset =
++ rx->offset + len;
++ skb_shinfo(skb)->frags[0].size = rx->status - len;
++ skb->data_len = rx->status - len;
++ } else {
++ skb_shinfo(skb)->frags[0].page = NULL;
++ skb_shinfo(skb)->nr_frags = 0;
++ }
++
++ i = xennet_fill_frags(np, skb, &tmpq);
++
++ /*
++ * Truesize must approximates the size of true data plus
++ * any supervisor overheads. Adding hypervisor overheads
++ * has been shown to significantly reduce achievable
++ * bandwidth with the default receive buffer size. It is
++ * therefore not wise to account for it here.
++ *
++ * After alloc_skb(RX_COPY_THRESHOLD), truesize is set to
++ * RX_COPY_THRESHOLD + the supervisor overheads. Here, we
++ * add the size of the data pulled in xennet_fill_frags().
++ *
++ * We also adjust for any unused space in the main data
++ * area by subtracting (RX_COPY_THRESHOLD - len). This is
++ * especially important with drivers which split incoming
++ * packets into header and data, using only 66 bytes of
++ * the main data area (see the e1000 driver for example.)
++ * On such systems, without this last adjustement, our
++ * achievable receive throughout using the standard receive
++ * buffer size was cut by 25%(!!!).
++ */
++ skb->truesize += skb->data_len - (RX_COPY_THRESHOLD - len);
++ skb->len += skb->data_len;
++
++ /*
++ * Old backends do not assert data_validated but we
++ * can infer it from csum_blank so test both flags.
++ */
++ if (rx->flags & (NETRXF_data_validated|NETRXF_csum_blank))
++ skb->ip_summed = CHECKSUM_UNNECESSARY;
++ else
++ skb->ip_summed = CHECKSUM_NONE;
++#ifdef CONFIG_XEN
++ skb->proto_data_valid = (skb->ip_summed != CHECKSUM_NONE);
++ skb->proto_csum_blank = !!(rx->flags & NETRXF_csum_blank);
++#endif
++ np->stats.rx_packets++;
++ np->stats.rx_bytes += skb->len;
++
++ __skb_queue_tail(&rxq, skb);
++
++ np->rx.rsp_cons = ++i;
++ work_done++;
++ }
++
++ if (pages_flipped) {
++ /* Some pages are no longer absent... */
++ balloon_update_driver_allowance(-pages_flipped);
++
++ /* Do all the remapping work and M2P updates. */
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ mcl = np->rx_mcl + pages_flipped;
++ mcl->op = __HYPERVISOR_mmu_update;
++ mcl->args[0] = (unsigned long)np->rx_mmu;
++ mcl->args[1] = pages_flipped;
++ mcl->args[2] = 0;
++ mcl->args[3] = DOMID_SELF;
++ err = HYPERVISOR_multicall_check(np->rx_mcl,
++ pages_flipped + 1,
++ NULL);
++ BUG_ON(err);
++ }
++ }
++
++ while ((skb = __skb_dequeue(&errq)))
++ kfree_skb(skb);
++
++ while ((skb = __skb_dequeue(&rxq)) != NULL) {
++ struct page *page = NETFRONT_SKB_CB(skb)->page;
++ void *vaddr = page_address(page);
++ unsigned offset = NETFRONT_SKB_CB(skb)->offset;
++
++ memcpy(skb->data, vaddr + offset, skb_headlen(skb));
++
++ if (page != skb_shinfo(skb)->frags[0].page)
++ __free_page(page);
++
++ /* Ethernet work: Delayed to here as it peeks the header. */
++ skb->protocol = eth_type_trans(skb, dev);
++
++ /* Pass it up. */
++ netif_receive_skb(skb);
++ dev->last_rx = jiffies;
++ }
++
++ /* If we get a callback with very few responses, reduce fill target. */
++ /* NB. Note exponential increase, linear decrease. */
++ if (((np->rx.req_prod_pvt - np->rx.sring->rsp_prod) >
++ ((3*np->rx_target) / 4)) &&
++ (--np->rx_target < np->rx_min_target))
++ np->rx_target = np->rx_min_target;
++
++ network_alloc_rx_buffers(dev);
++
++ if (work_done < budget) {
++ /* there's some spare capacity, try the accelerated path */
++ int accel_budget = budget - work_done;
++ int accel_budget_start = accel_budget;
++
++ if (np->accel_vif_state.hooks) {
++ accel_more_to_do =
++ np->accel_vif_state.hooks->netdev_poll
++ (dev, &accel_budget);
++ work_done += (accel_budget_start - accel_budget);
++ } else
++ accel_more_to_do = 0;
++ }
++
++ *pbudget -= work_done;
++ dev->quota -= work_done;
++
++ if (work_done < budget) {
++ local_irq_save(flags);
++
++ RING_FINAL_CHECK_FOR_RESPONSES(&np->rx, more_to_do);
++
++ if (!more_to_do && !accel_more_to_do &&
++ np->accel_vif_state.hooks) {
++ /*
++ * Slow path has nothing more to do, see if
++ * fast path is likewise
++ */
++ accel_more_to_do =
++ np->accel_vif_state.hooks->start_napi_irq(dev);
++ }
++
++ if (!more_to_do && !accel_more_to_do)
++ __netif_rx_complete(dev);
++
++ local_irq_restore(flags);
++ }
++
++ spin_unlock(&np->rx_lock);
++
++ return more_to_do | accel_more_to_do;
++}
++
++static void netif_release_tx_bufs(struct netfront_info *np)
++{
++ struct sk_buff *skb;
++ int i;
++
++ for (i = 1; i <= NET_TX_RING_SIZE; i++) {
++ if ((unsigned long)np->tx_skbs[i] < PAGE_OFFSET)
++ continue;
++
++ skb = np->tx_skbs[i];
++ gnttab_end_foreign_access_ref(np->grant_tx_ref[i]);
++ gnttab_release_grant_reference(
++ &np->gref_tx_head, np->grant_tx_ref[i]);
++ np->grant_tx_ref[i] = GRANT_INVALID_REF;
++ add_id_to_freelist(np->tx_skbs, i);
++ dev_kfree_skb_irq(skb);
++ }
++}
++
++static void netif_release_rx_bufs_flip(struct netfront_info *np)
++{
++ struct mmu_update *mmu = np->rx_mmu;
++ struct multicall_entry *mcl = np->rx_mcl;
++ struct sk_buff_head free_list;
++ struct sk_buff *skb;
++ unsigned long mfn;
++ int xfer = 0, noxfer = 0, unused = 0;
++ int id, ref, rc;
++
++ skb_queue_head_init(&free_list);
++
++ spin_lock_bh(&np->rx_lock);
++
++ for (id = 0; id < NET_RX_RING_SIZE; id++) {
++ if ((ref = np->grant_rx_ref[id]) == GRANT_INVALID_REF) {
++ unused++;
++ continue;
++ }
++
++ skb = np->rx_skbs[id];
++ mfn = gnttab_end_foreign_transfer_ref(ref);
++ gnttab_release_grant_reference(&np->gref_rx_head, ref);
++ np->grant_rx_ref[id] = GRANT_INVALID_REF;
++ add_id_to_freelist(np->rx_skbs, id);
++
++ if (0 == mfn) {
++ struct page *page = skb_shinfo(skb)->frags[0].page;
++ balloon_release_driver_page(page);
++ skb_shinfo(skb)->nr_frags = 0;
++ dev_kfree_skb(skb);
++ noxfer++;
++ continue;
++ }
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ /* Remap the page. */
++ struct page *page = skb_shinfo(skb)->frags[0].page;
++ unsigned long pfn = page_to_pfn(page);
++ void *vaddr = page_address(page);
++
++ MULTI_update_va_mapping(mcl, (unsigned long)vaddr,
++ pfn_pte_ma(mfn, PAGE_KERNEL),
++ 0);
++ mcl++;
++ mmu->ptr = ((maddr_t)mfn << PAGE_SHIFT)
++ | MMU_MACHPHYS_UPDATE;
++ mmu->val = pfn;
++ mmu++;
++
++ set_phys_to_machine(pfn, mfn);
++ }
++ __skb_queue_tail(&free_list, skb);
++ xfer++;
++ }
++
++ DPRINTK("%s: %d xfer, %d noxfer, %d unused\n",
++ __FUNCTION__, xfer, noxfer, unused);
++
++ if (xfer) {
++ /* Some pages are no longer absent... */
++ balloon_update_driver_allowance(-xfer);
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ /* Do all the remapping work and M2P updates. */
++ mcl->op = __HYPERVISOR_mmu_update;
++ mcl->args[0] = (unsigned long)np->rx_mmu;
++ mcl->args[1] = mmu - np->rx_mmu;
++ mcl->args[2] = 0;
++ mcl->args[3] = DOMID_SELF;
++ mcl++;
++ rc = HYPERVISOR_multicall_check(
++ np->rx_mcl, mcl - np->rx_mcl, NULL);
++ BUG_ON(rc);
++ }
++ }
++
++ while ((skb = __skb_dequeue(&free_list)) != NULL)
++ dev_kfree_skb(skb);
++
++ spin_unlock_bh(&np->rx_lock);
++}
++
++static void netif_release_rx_bufs_copy(struct netfront_info *np)
++{
++ struct sk_buff *skb;
++ int i, ref;
++ int busy = 0, inuse = 0;
++
++ spin_lock_bh(&np->rx_lock);
++
++ for (i = 0; i < NET_RX_RING_SIZE; i++) {
++ ref = np->grant_rx_ref[i];
++
++ if (ref == GRANT_INVALID_REF)
++ continue;
++
++ inuse++;
++
++ skb = np->rx_skbs[i];
++
++ if (!gnttab_end_foreign_access_ref(ref))
++ {
++ busy++;
++ continue;
++ }
++
++ gnttab_release_grant_reference(&np->gref_rx_head, ref);
++ np->grant_rx_ref[i] = GRANT_INVALID_REF;
++ add_id_to_freelist(np->rx_skbs, i);
++
++ dev_kfree_skb(skb);
++ }
++
++ if (busy)
++ DPRINTK("%s: Unable to release %d of %d inuse grant references out of %ld total.\n",
++ __FUNCTION__, busy, inuse, NET_RX_RING_SIZE);
++
++ spin_unlock_bh(&np->rx_lock);
++}
++
++static int network_close(struct net_device *dev)
++{
++ struct netfront_info *np = netdev_priv(dev);
++ netif_stop_queue(np->netdev);
++ return 0;
++}
++
++
++static struct net_device_stats *network_get_stats(struct net_device *dev)
++{
++ struct netfront_info *np = netdev_priv(dev);
++
++ netfront_accelerator_call_get_stats(np, dev);
++ return &np->stats;
++}
++
++static int xennet_set_mac_address(struct net_device *dev, void *p)
++{
++ struct netfront_info *np = netdev_priv(dev);
++ struct sockaddr *addr = p;
++
++ if (netif_running(dev))
++ return -EBUSY;
++
++ if (!is_valid_ether_addr(addr->sa_data))
++ return -EADDRNOTAVAIL;
++
++ memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
++ memcpy(np->mac, addr->sa_data, ETH_ALEN);
++
++ return 0;
++}
++
++static int xennet_change_mtu(struct net_device *dev, int mtu)
++{
++ int max = xennet_can_sg(dev) ? 65535 - ETH_HLEN : ETH_DATA_LEN;
++
++ if (mtu > max)
++ return -EINVAL;
++ dev->mtu = mtu;
++ return 0;
++}
++
++static int xennet_set_sg(struct net_device *dev, u32 data)
++{
++ if (data) {
++ struct netfront_info *np = netdev_priv(dev);
++ int val;
++
++ if (xenbus_scanf(XBT_NIL, np->xbdev->otherend, "feature-sg",
++ "%d", &val) < 0)
++ val = 0;
++ if (!val)
++ return -ENOSYS;
++ } else if (dev->mtu > ETH_DATA_LEN)
++ dev->mtu = ETH_DATA_LEN;
++
++ return ethtool_op_set_sg(dev, data);
++}
++
++static int xennet_set_tso(struct net_device *dev, u32 data)
++{
++ if (data) {
++ struct netfront_info *np = netdev_priv(dev);
++ int val;
++
++ if (xenbus_scanf(XBT_NIL, np->xbdev->otherend,
++ "feature-gso-tcpv4", "%d", &val) < 0)
++ val = 0;
++ if (!val)
++ return -ENOSYS;
++ }
++
++ return ethtool_op_set_tso(dev, data);
++}
++
++static void xennet_set_features(struct net_device *dev)
++{
++ dev_disable_gso_features(dev);
++ xennet_set_sg(dev, 0);
++
++ /* We need checksum offload to enable scatter/gather and TSO. */
++ if (!(dev->features & NETIF_F_IP_CSUM))
++ return;
++
++ if (xennet_set_sg(dev, 1))
++ return;
++
++ /* Before 2.6.9 TSO seems to be unreliable so do not enable it
++ * on older kernels.
++ */
++ if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,9))
++ xennet_set_tso(dev, 1);
++}
++
++static int network_connect(struct net_device *dev)
++{
++ struct netfront_info *np = netdev_priv(dev);
++ int i, requeue_idx, err;
++ struct sk_buff *skb;
++ grant_ref_t ref;
++ netif_rx_request_t *req;
++ unsigned int feature_rx_copy, feature_rx_flip;
++
++ err = xenbus_scanf(XBT_NIL, np->xbdev->otherend,
++ "feature-rx-copy", "%u", &feature_rx_copy);
++ if (err != 1)
++ feature_rx_copy = 0;
++ err = xenbus_scanf(XBT_NIL, np->xbdev->otherend,
++ "feature-rx-flip", "%u", &feature_rx_flip);
++ if (err != 1)
++ feature_rx_flip = 1;
++
++ /*
++ * Copy packets on receive path if:
++ * (a) This was requested by user, and the backend supports it; or
++ * (b) Flipping was requested, but this is unsupported by the backend.
++ */
++ np->copying_receiver = ((MODPARM_rx_copy && feature_rx_copy) ||
++ (MODPARM_rx_flip && !feature_rx_flip));
++
++ err = talk_to_backend(np->xbdev, np);
++ if (err)
++ return err;
++
++ xennet_set_features(dev);
++
++ DPRINTK("device %s has %sing receive path.\n",
++ dev->name, np->copying_receiver ? "copy" : "flipp");
++
++ spin_lock_bh(&np->rx_lock);
++ spin_lock_irq(&np->tx_lock);
++
++ /*
++ * Recovery procedure:
++ * NB. Freelist index entries are always going to be less than
++ * PAGE_OFFSET, whereas pointers to skbs will always be equal or
++ * greater than PAGE_OFFSET: we use this property to distinguish
++ * them.
++ */
++
++ /* Step 1: Discard all pending TX packet fragments. */
++ netif_release_tx_bufs(np);
++
++ /* Step 2: Rebuild the RX buffer freelist and the RX ring itself. */
++ for (requeue_idx = 0, i = 0; i < NET_RX_RING_SIZE; i++) {
++ if (!np->rx_skbs[i])
++ continue;
++
++ skb = np->rx_skbs[requeue_idx] = xennet_get_rx_skb(np, i);
++ ref = np->grant_rx_ref[requeue_idx] = xennet_get_rx_ref(np, i);
++ req = RING_GET_REQUEST(&np->rx, requeue_idx);
++
++ if (!np->copying_receiver) {
++ gnttab_grant_foreign_transfer_ref(
++ ref, np->xbdev->otherend_id,
++ page_to_pfn(skb_shinfo(skb)->frags->page));
++ } else {
++ gnttab_grant_foreign_access_ref(
++ ref, np->xbdev->otherend_id,
++ pfn_to_mfn(page_to_pfn(skb_shinfo(skb)->
++ frags->page)),
++ 0);
++ }
++ req->gref = ref;
++ req->id = requeue_idx;
++
++ requeue_idx++;
++ }
++
++ np->rx.req_prod_pvt = requeue_idx;
++
++ /*
++ * Step 3: All public and private state should now be sane. Get
++ * ready to start sending and receiving packets and give the driver
++ * domain a kick because we've probably just requeued some
++ * packets.
++ */
++ netfront_carrier_on(np);
++ notify_remote_via_irq(np->irq);
++ network_tx_buf_gc(dev);
++ network_alloc_rx_buffers(dev);
++
++ spin_unlock_irq(&np->tx_lock);
++ spin_unlock_bh(&np->rx_lock);
++
++ return 0;
++}
++
++static void netif_uninit(struct net_device *dev)
++{
++ struct netfront_info *np = netdev_priv(dev);
++ netif_release_tx_bufs(np);
++ if (np->copying_receiver)
++ netif_release_rx_bufs_copy(np);
++ else
++ netif_release_rx_bufs_flip(np);
++ gnttab_free_grant_references(np->gref_tx_head);
++ gnttab_free_grant_references(np->gref_rx_head);
++}
++
++static struct ethtool_ops network_ethtool_ops =
++{
++ .get_tx_csum = ethtool_op_get_tx_csum,
++ .set_tx_csum = ethtool_op_set_tx_csum,
++ .get_sg = ethtool_op_get_sg,
++ .set_sg = xennet_set_sg,
++#if HAVE_TSO
++ .get_tso = ethtool_op_get_tso,
++ .set_tso = xennet_set_tso,
++#endif
++ .get_link = ethtool_op_get_link,
++};
++
++#ifdef CONFIG_SYSFS
++static ssize_t show_rxbuf_min(struct class_device *cd, char *buf)
++{
++ struct net_device *netdev = container_of(cd, struct net_device,
++ class_dev);
++ struct netfront_info *info = netdev_priv(netdev);
++
++ return sprintf(buf, "%u\n", info->rx_min_target);
++}
++
++static ssize_t store_rxbuf_min(struct class_device *cd,
++ const char *buf, size_t len)
++{
++ struct net_device *netdev = container_of(cd, struct net_device,
++ class_dev);
++ struct netfront_info *np = netdev_priv(netdev);
++ char *endp;
++ unsigned long target;
++
++ if (!capable(CAP_NET_ADMIN))
++ return -EPERM;
++
++ target = simple_strtoul(buf, &endp, 0);
++ if (endp == buf)
++ return -EBADMSG;
++
++ if (target < RX_MIN_TARGET)
++ target = RX_MIN_TARGET;
++ if (target > RX_MAX_TARGET)
++ target = RX_MAX_TARGET;
++
++ spin_lock_bh(&np->rx_lock);
++ if (target > np->rx_max_target)
++ np->rx_max_target = target;
++ np->rx_min_target = target;
++ if (target > np->rx_target)
++ np->rx_target = target;
++
++ network_alloc_rx_buffers(netdev);
++
++ spin_unlock_bh(&np->rx_lock);
++ return len;
++}
++
++static ssize_t show_rxbuf_max(struct class_device *cd, char *buf)
++{
++ struct net_device *netdev = container_of(cd, struct net_device,
++ class_dev);
++ struct netfront_info *info = netdev_priv(netdev);
++
++ return sprintf(buf, "%u\n", info->rx_max_target);
++}
++
++static ssize_t store_rxbuf_max(struct class_device *cd,
++ const char *buf, size_t len)
++{
++ struct net_device *netdev = container_of(cd, struct net_device,
++ class_dev);
++ struct netfront_info *np = netdev_priv(netdev);
++ char *endp;
++ unsigned long target;
++
++ if (!capable(CAP_NET_ADMIN))
++ return -EPERM;
++
++ target = simple_strtoul(buf, &endp, 0);
++ if (endp == buf)
++ return -EBADMSG;
++
++ if (target < RX_MIN_TARGET)
++ target = RX_MIN_TARGET;
++ if (target > RX_MAX_TARGET)
++ target = RX_MAX_TARGET;
++
++ spin_lock_bh(&np->rx_lock);
++ if (target < np->rx_min_target)
++ np->rx_min_target = target;
++ np->rx_max_target = target;
++ if (target < np->rx_target)
++ np->rx_target = target;
++
++ network_alloc_rx_buffers(netdev);
++
++ spin_unlock_bh(&np->rx_lock);
++ return len;
++}
++
++static ssize_t show_rxbuf_cur(struct class_device *cd, char *buf)
++{
++ struct net_device *netdev = container_of(cd, struct net_device,
++ class_dev);
++ struct netfront_info *info = netdev_priv(netdev);
++
++ return sprintf(buf, "%u\n", info->rx_target);
++}
++
++static const struct class_device_attribute xennet_attrs[] = {
++ __ATTR(rxbuf_min, S_IRUGO|S_IWUSR, show_rxbuf_min, store_rxbuf_min),
++ __ATTR(rxbuf_max, S_IRUGO|S_IWUSR, show_rxbuf_max, store_rxbuf_max),
++ __ATTR(rxbuf_cur, S_IRUGO, show_rxbuf_cur, NULL),
++};
++
++static int xennet_sysfs_addif(struct net_device *netdev)
++{
++ int i;
++ int error = 0;
++
++ for (i = 0; i < ARRAY_SIZE(xennet_attrs); i++) {
++ error = class_device_create_file(&netdev->class_dev,
++ &xennet_attrs[i]);
++ if (error)
++ goto fail;
++ }
++ return 0;
++
++ fail:
++ while (--i >= 0)
++ class_device_remove_file(&netdev->class_dev,
++ &xennet_attrs[i]);
++ return error;
++}
++
++static void xennet_sysfs_delif(struct net_device *netdev)
++{
++ int i;
++
++ for (i = 0; i < ARRAY_SIZE(xennet_attrs); i++) {
++ class_device_remove_file(&netdev->class_dev,
++ &xennet_attrs[i]);
++ }
++}
++
++#endif /* CONFIG_SYSFS */
++
++
++/*
++ * Nothing to do here. Virtual interface is point-to-point and the
++ * physical interface is probably promiscuous anyway.
++ */
++static void network_set_multicast_list(struct net_device *dev)
++{
++}
++
++static struct net_device * __devinit create_netdev(struct xenbus_device *dev)
++{
++ int i, err = 0;
++ struct net_device *netdev = NULL;
++ struct netfront_info *np = NULL;
++
++ netdev = alloc_etherdev(sizeof(struct netfront_info));
++ if (!netdev) {
++ printk(KERN_WARNING "%s> alloc_etherdev failed.\n",
++ __FUNCTION__);
++ return ERR_PTR(-ENOMEM);
++ }
++
++ np = netdev_priv(netdev);
++ np->xbdev = dev;
++
++ spin_lock_init(&np->tx_lock);
++ spin_lock_init(&np->rx_lock);
++
++ init_accelerator_vif(np, dev);
++
++ skb_queue_head_init(&np->rx_batch);
++ np->rx_target = RX_DFL_MIN_TARGET;
++ np->rx_min_target = RX_DFL_MIN_TARGET;
++ np->rx_max_target = RX_MAX_TARGET;
++
++ init_timer(&np->rx_refill_timer);
++ np->rx_refill_timer.data = (unsigned long)netdev;
++ np->rx_refill_timer.function = rx_refill_timeout;
++
++ /* Initialise {tx,rx}_skbs as a free chain containing every entry. */
++ for (i = 0; i <= NET_TX_RING_SIZE; i++) {
++ np->tx_skbs[i] = (void *)((unsigned long) i+1);
++ np->grant_tx_ref[i] = GRANT_INVALID_REF;
++ }
++
++ for (i = 0; i < NET_RX_RING_SIZE; i++) {
++ np->rx_skbs[i] = NULL;
++ np->grant_rx_ref[i] = GRANT_INVALID_REF;
++ }
++
++ /* A grant for every tx ring slot */
++ if (gnttab_alloc_grant_references(TX_MAX_TARGET,
++ &np->gref_tx_head) < 0) {
++ printk(KERN_ALERT "#### netfront can't alloc tx grant refs\n");
++ err = -ENOMEM;
++ goto exit;
++ }
++ /* A grant for every rx ring slot */
++ if (gnttab_alloc_grant_references(RX_MAX_TARGET,
++ &np->gref_rx_head) < 0) {
++ printk(KERN_ALERT "#### netfront can't alloc rx grant refs\n");
++ err = -ENOMEM;
++ goto exit_free_tx;
++ }
++
++ netdev->open = network_open;
++ netdev->hard_start_xmit = network_start_xmit;
++ netdev->stop = network_close;
++ netdev->get_stats = network_get_stats;
++ netdev->poll = netif_poll;
++ netdev->set_multicast_list = network_set_multicast_list;
++ netdev->uninit = netif_uninit;
++ netdev->set_mac_address = xennet_set_mac_address;
++ netdev->change_mtu = xennet_change_mtu;
++ netdev->weight = 64;
++ netdev->features = NETIF_F_IP_CSUM;
++
++ SET_ETHTOOL_OPS(netdev, &network_ethtool_ops);
++ SET_MODULE_OWNER(netdev);
++ SET_NETDEV_DEV(netdev, &dev->dev);
++
++ np->netdev = netdev;
++
++ netfront_carrier_off(np);
++
++ return netdev;
++
++ exit_free_tx:
++ gnttab_free_grant_references(np->gref_tx_head);
++ exit:
++ free_netdev(netdev);
++ return ERR_PTR(err);
++}
++
++#ifdef CONFIG_INET
++/*
++ * We use this notifier to send out a fake ARP reply to reset switches and
++ * router ARP caches when an IP interface is brought up on a VIF.
++ */
++static int
++inetdev_notify(struct notifier_block *this, unsigned long event, void *ptr)
++{
++ struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
++ struct net_device *dev = ifa->ifa_dev->dev;
++
++ /* UP event and is it one of our devices? */
++ if (event == NETDEV_UP && dev->open == network_open)
++ send_fake_arp(dev);
++
++ return NOTIFY_DONE;
++}
++
++static struct notifier_block notifier_inetdev = {
++ .notifier_call = inetdev_notify,
++ .next = NULL,
++ .priority = 0
++};
++#endif
++
++
++static void netif_disconnect_backend(struct netfront_info *info)
++{
++ /* Stop old i/f to prevent errors whilst we rebuild the state. */
++ spin_lock_bh(&info->rx_lock);
++ spin_lock_irq(&info->tx_lock);
++ netfront_carrier_off(info);
++ spin_unlock_irq(&info->tx_lock);
++ spin_unlock_bh(&info->rx_lock);
++
++ if (info->irq)
++ unbind_from_irqhandler(info->irq, info->netdev);
++ info->irq = 0;
++
++ end_access(info->tx_ring_ref, info->tx.sring);
++ end_access(info->rx_ring_ref, info->rx.sring);
++ info->tx_ring_ref = GRANT_INVALID_REF;
++ info->rx_ring_ref = GRANT_INVALID_REF;
++ info->tx.sring = NULL;
++ info->rx.sring = NULL;
++}
++
++
++static void end_access(int ref, void *page)
++{
++ if (ref != GRANT_INVALID_REF)
++ gnttab_end_foreign_access(ref, (unsigned long)page);
++}
++
++
++/* ** Driver registration ** */
++
++
++static const struct xenbus_device_id netfront_ids[] = {
++ { "vif" },
++ { "" }
++};
++MODULE_ALIAS("xen:vif");
++
++
++static struct xenbus_driver netfront_driver = {
++ .name = "vif",
++ .owner = THIS_MODULE,
++ .ids = netfront_ids,
++ .probe = netfront_probe,
++ .remove = __devexit_p(netfront_remove),
++ .suspend = netfront_suspend,
++ .suspend_cancel = netfront_suspend_cancel,
++ .resume = netfront_resume,
++ .otherend_changed = backend_changed,
++};
++
++
++static int __init netif_init(void)
++{
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++#ifdef CONFIG_XEN
++ if (MODPARM_rx_flip && MODPARM_rx_copy) {
++ WPRINTK("Cannot specify both rx_copy and rx_flip.\n");
++ return -EINVAL;
++ }
++
++ if (!MODPARM_rx_flip && !MODPARM_rx_copy)
++ MODPARM_rx_flip = 1; /* Default is to flip. */
++#endif
++
++ netif_init_accel();
++
++ IPRINTK("Initialising virtual ethernet driver.\n");
++
++#ifdef CONFIG_INET
++ (void)register_inetaddr_notifier(¬ifier_inetdev);
++#endif
++
++ return xenbus_register_frontend(&netfront_driver);
++}
++module_init(netif_init);
++
++
++static void __exit netif_exit(void)
++{
++#ifdef CONFIG_INET
++ unregister_inetaddr_notifier(¬ifier_inetdev);
++#endif
++
++ netif_exit_accel();
++
++ return xenbus_unregister_driver(&netfront_driver);
++}
++module_exit(netif_exit);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/netfront/netfront.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/netfront/netfront.h 2008-01-07 13:19:18.000000000 +0100
+@@ -0,0 +1,274 @@
++/******************************************************************************
++ * Virtual network driver for conversing with remote driver backends.
++ *
++ * Copyright (c) 2002-2005, K A Fraser
++ * Copyright (c) 2005, XenSource Ltd
++ * Copyright (C) 2007 Solarflare Communications, Inc.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef NETFRONT_H
++#define NETFRONT_H
++
++#include <xen/interface/io/netif.h>
++#include <linux/netdevice.h>
++#include <linux/skbuff.h>
++#include <linux/list.h>
++
++#define NET_TX_RING_SIZE __RING_SIZE((struct netif_tx_sring *)0, PAGE_SIZE)
++#define NET_RX_RING_SIZE __RING_SIZE((struct netif_rx_sring *)0, PAGE_SIZE)
++
++#include <xen/xenbus.h>
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++/*
++ * Function pointer table for hooks into a network acceleration
++ * plugin. These are called at appropriate points from the netfront
++ * driver
++ */
++struct netfront_accel_hooks {
++ /*
++ * new_device: Accelerator hook to ask the plugin to support a
++ * new network interface
++ */
++ int (*new_device)(struct net_device *net_dev, struct xenbus_device *dev);
++ /*
++ * remove: Opposite of new_device
++ */
++ int (*remove)(struct xenbus_device *dev);
++ /*
++ * The net_device is being polled, check the accelerated
++ * hardware for any pending packets
++ */
++ int (*netdev_poll)(struct net_device *dev, int *pbudget);
++ /*
++ * start_xmit: Used to give the accelerated plugin the option
++ * of sending a packet. Returns non-zero if has done so, or
++ * zero to decline and force the packet onto normal send
++ * path
++ */
++ int (*start_xmit)(struct sk_buff *skb, struct net_device *dev);
++ /*
++ * start/stop_napi_interrupts Used by netfront to indicate
++ * when napi interrupts should be enabled or disabled
++ */
++ int (*start_napi_irq)(struct net_device *dev);
++ void (*stop_napi_irq)(struct net_device *dev);
++ /*
++ * Called before re-enabling the TX queue to check the fast
++ * path has slots too
++ */
++ int (*check_ready)(struct net_device *dev);
++ /*
++ * Get the fastpath network statistics
++ */
++ int (*get_stats)(struct net_device *dev,
++ struct net_device_stats *stats);
++};
++
++
++/* Version of API/protocol for communication between netfront and
++ acceleration plugin supported */
++#define NETFRONT_ACCEL_VERSION 0x00010003
++
++/*
++ * Per-netfront device state for the accelerator. This is used to
++ * allow efficient per-netfront device access to the accelerator
++ * hooks
++ */
++struct netfront_accel_vif_state {
++ struct list_head link;
++
++ struct xenbus_device *dev;
++ struct netfront_info *np;
++ struct netfront_accel_hooks *hooks;
++
++ /* Watch on the accelerator configuration value */
++ struct xenbus_watch accel_watch;
++ /* Work item to process change in accelerator */
++ struct work_struct accel_work;
++ /* The string from xenbus last time accel_watch fired */
++ char *accel_frontend;
++};
++
++/*
++ * Per-accelerator state stored in netfront. These form a list that
++ * is used to track which devices are accelerated by which plugins,
++ * and what plugins are available/have been requested
++ */
++struct netfront_accelerator {
++ /* Used to make a list */
++ struct list_head link;
++ /* ID of the accelerator */
++ int id;
++ /*
++ * String describing the accelerator. Currently this is the
++ * name of the accelerator module. This is provided by the
++ * backend accelerator through xenstore
++ */
++ char *frontend;
++ /* The hooks into the accelerator plugin module */
++ struct netfront_accel_hooks *hooks;
++
++ /*
++ * List of per-netfront device state (struct
++ * netfront_accel_vif_state) for each netfront device that is
++ * using this accelerator
++ */
++ struct list_head vif_states;
++ spinlock_t vif_states_lock;
++};
++
++struct netfront_info {
++ struct list_head list;
++ struct net_device *netdev;
++
++ struct net_device_stats stats;
++
++ struct netif_tx_front_ring tx;
++ struct netif_rx_front_ring rx;
++
++ spinlock_t tx_lock;
++ spinlock_t rx_lock;
++
++ unsigned int irq;
++ unsigned int copying_receiver;
++ unsigned int carrier;
++
++ /* Receive-ring batched refills. */
++#define RX_MIN_TARGET 8
++#define RX_DFL_MIN_TARGET 64
++#define RX_MAX_TARGET min_t(int, NET_RX_RING_SIZE, 256)
++ unsigned rx_min_target, rx_max_target, rx_target;
++ struct sk_buff_head rx_batch;
++
++ struct timer_list rx_refill_timer;
++
++ /*
++ * {tx,rx}_skbs store outstanding skbuffs. The first entry in tx_skbs
++ * is an index into a chain of free entries.
++ */
++ struct sk_buff *tx_skbs[NET_TX_RING_SIZE+1];
++ struct sk_buff *rx_skbs[NET_RX_RING_SIZE];
++
++#define TX_MAX_TARGET min_t(int, NET_RX_RING_SIZE, 256)
++ grant_ref_t gref_tx_head;
++ grant_ref_t grant_tx_ref[NET_TX_RING_SIZE + 1];
++ grant_ref_t gref_rx_head;
++ grant_ref_t grant_rx_ref[NET_RX_RING_SIZE];
++
++ struct xenbus_device *xbdev;
++ int tx_ring_ref;
++ int rx_ring_ref;
++ u8 mac[ETH_ALEN];
++
++ unsigned long rx_pfn_array[NET_RX_RING_SIZE];
++ struct multicall_entry rx_mcl[NET_RX_RING_SIZE+1];
++ struct mmu_update rx_mmu[NET_RX_RING_SIZE];
++
++ /* Private pointer to state internal to accelerator module */
++ void *accel_priv;
++ /* The accelerator used by this netfront device */
++ struct netfront_accelerator *accelerator;
++ /* The accelerator state for this netfront device */
++ struct netfront_accel_vif_state accel_vif_state;
++};
++
++
++/* Exported Functions */
++
++/*
++ * Called by an accelerator plugin module when it has loaded.
++ *
++ * frontend: the string describing the accelerator, currently the module name
++ * hooks: the hooks for netfront to use to call into the accelerator
++ * version: the version of API between frontend and plugin requested
++ *
++ * return: 0 on success, <0 on error, >0 (with version supported) on
++ * version mismatch
++ */
++extern int netfront_accelerator_loaded(int version, const char *frontend,
++ struct netfront_accel_hooks *hooks);
++
++/*
++ * Called by an accelerator plugin module when it is about to unload.
++ *
++ * frontend: the string describing the accelerator. Must match the
++ * one passed to netfront_accelerator_loaded()
++ */
++extern void netfront_accelerator_stop(const char *frontend);
++
++/*
++ * Called by an accelerator before waking the net device's TX queue to
++ * ensure the slow path has available slots. Returns true if OK to
++ * wake, false if still busy
++ */
++extern int netfront_check_queue_ready(struct net_device *net_dev);
++
++
++/* Internal-to-netfront Functions */
++
++/*
++ * Call into accelerator and check to see if it has tx space before we
++ * wake the net device's TX queue. Returns true if OK to wake, false
++ * if still busy
++ */
++extern
++int netfront_check_accelerator_queue_ready(struct net_device *dev,
++ struct netfront_info *np);
++extern
++int netfront_accelerator_call_remove(struct netfront_info *np,
++ struct xenbus_device *dev);
++extern
++int netfront_accelerator_suspend(struct netfront_info *np,
++ struct xenbus_device *dev);
++extern
++int netfront_accelerator_suspend_cancel(struct netfront_info *np,
++ struct xenbus_device *dev);
++extern
++void netfront_accelerator_resume(struct netfront_info *np,
++ struct xenbus_device *dev);
++extern
++void netfront_accelerator_call_stop_napi_irq(struct netfront_info *np,
++ struct net_device *dev);
++extern
++int netfront_accelerator_call_get_stats(struct netfront_info *np,
++ struct net_device *dev);
++extern
++void netfront_accelerator_add_watch(struct netfront_info *np);
++
++extern
++void netif_init_accel(void);
++extern
++void netif_exit_accel(void);
++
++extern
++void init_accelerator_vif(struct netfront_info *np,
++ struct xenbus_device *dev);
++#endif /* NETFRONT_H */
+Index: head-2008-11-25/drivers/xen/pciback/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/Makefile 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,17 @@
++obj-$(CONFIG_XEN_PCIDEV_BACKEND) += pciback.o
++
++pciback-y := pci_stub.o pciback_ops.o xenbus.o
++pciback-y += conf_space.o conf_space_header.o \
++ conf_space_capability.o \
++ conf_space_capability_vpd.o \
++ conf_space_capability_pm.o \
++ conf_space_quirks.o
++pciback-$(CONFIG_PCI_MSI) += conf_space_capability_msi.o
++pciback-$(CONFIG_XEN_PCIDEV_BACKEND_VPCI) += vpci.o
++pciback-$(CONFIG_XEN_PCIDEV_BACKEND_SLOT) += slot.o
++pciback-$(CONFIG_XEN_PCIDEV_BACKEND_PASS) += passthrough.o
++pciback-$(CONFIG_XEN_PCIDEV_BACKEND_CONTROLLER) += controller.o
++
++ifeq ($(CONFIG_XEN_PCIDEV_BE_DEBUG),y)
++EXTRA_CFLAGS += -DDEBUG
++endif
+Index: head-2008-11-25/drivers/xen/pciback/conf_space.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,426 @@
++/*
++ * PCI Backend - Functions for creating a virtual configuration space for
++ * exported PCI Devices.
++ * It's dangerous to allow PCI Driver Domains to change their
++ * device's resources (memory, i/o ports, interrupts). We need to
++ * restrict changes to certain PCI Configuration registers:
++ * BARs, INTERRUPT_PIN, most registers in the header...
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#include <linux/kernel.h>
++#include <linux/pci.h>
++#include "pciback.h"
++#include "conf_space.h"
++#include "conf_space_quirks.h"
++
++#define DEFINE_PCI_CONFIG(op,size,type) \
++int pciback_##op##_config_##size \
++(struct pci_dev *dev, int offset, type value, void *data) \
++{ \
++ return pci_##op##_config_##size (dev, offset, value); \
++}
++
++DEFINE_PCI_CONFIG(read, byte, u8 *)
++DEFINE_PCI_CONFIG(read, word, u16 *)
++DEFINE_PCI_CONFIG(read, dword, u32 *)
++
++DEFINE_PCI_CONFIG(write, byte, u8)
++DEFINE_PCI_CONFIG(write, word, u16)
++DEFINE_PCI_CONFIG(write, dword, u32)
++
++static int conf_space_read(struct pci_dev *dev,
++ const struct config_field_entry *entry,
++ int offset, u32 *value)
++{
++ int ret = 0;
++ const struct config_field *field = entry->field;
++
++ *value = 0;
++
++ switch (field->size) {
++ case 1:
++ if (field->u.b.read)
++ ret = field->u.b.read(dev, offset, (u8 *) value,
++ entry->data);
++ break;
++ case 2:
++ if (field->u.w.read)
++ ret = field->u.w.read(dev, offset, (u16 *) value,
++ entry->data);
++ break;
++ case 4:
++ if (field->u.dw.read)
++ ret = field->u.dw.read(dev, offset, value, entry->data);
++ break;
++ }
++ return ret;
++}
++
++static int conf_space_write(struct pci_dev *dev,
++ const struct config_field_entry *entry,
++ int offset, u32 value)
++{
++ int ret = 0;
++ const struct config_field *field = entry->field;
++
++ switch (field->size) {
++ case 1:
++ if (field->u.b.write)
++ ret = field->u.b.write(dev, offset, (u8) value,
++ entry->data);
++ break;
++ case 2:
++ if (field->u.w.write)
++ ret = field->u.w.write(dev, offset, (u16) value,
++ entry->data);
++ break;
++ case 4:
++ if (field->u.dw.write)
++ ret = field->u.dw.write(dev, offset, value,
++ entry->data);
++ break;
++ }
++ return ret;
++}
++
++static inline u32 get_mask(int size)
++{
++ if (size == 1)
++ return 0xff;
++ else if (size == 2)
++ return 0xffff;
++ else
++ return 0xffffffff;
++}
++
++static inline int valid_request(int offset, int size)
++{
++ /* Validate request (no un-aligned requests) */
++ if ((size == 1 || size == 2 || size == 4) && (offset % size) == 0)
++ return 1;
++ return 0;
++}
++
++static inline u32 merge_value(u32 val, u32 new_val, u32 new_val_mask,
++ int offset)
++{
++ if (offset >= 0) {
++ new_val_mask <<= (offset * 8);
++ new_val <<= (offset * 8);
++ } else {
++ new_val_mask >>= (offset * -8);
++ new_val >>= (offset * -8);
++ }
++ val = (val & ~new_val_mask) | (new_val & new_val_mask);
++
++ return val;
++}
++
++static int pcibios_err_to_errno(int err)
++{
++ switch (err) {
++ case PCIBIOS_SUCCESSFUL:
++ return XEN_PCI_ERR_success;
++ case PCIBIOS_DEVICE_NOT_FOUND:
++ return XEN_PCI_ERR_dev_not_found;
++ case PCIBIOS_BAD_REGISTER_NUMBER:
++ return XEN_PCI_ERR_invalid_offset;
++ case PCIBIOS_FUNC_NOT_SUPPORTED:
++ return XEN_PCI_ERR_not_implemented;
++ case PCIBIOS_SET_FAILED:
++ return XEN_PCI_ERR_access_denied;
++ }
++ return err;
++}
++
++int pciback_config_read(struct pci_dev *dev, int offset, int size,
++ u32 * ret_val)
++{
++ int err = 0;
++ struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
++ const struct config_field_entry *cfg_entry;
++ const struct config_field *field;
++ int req_start, req_end, field_start, field_end;
++ /* if read fails for any reason, return 0 (as if device didn't respond) */
++ u32 value = 0, tmp_val;
++
++ if (unlikely(verbose_request))
++ printk(KERN_DEBUG "pciback: %s: read %d bytes at 0x%x\n",
++ pci_name(dev), size, offset);
++
++ if (!valid_request(offset, size)) {
++ err = XEN_PCI_ERR_invalid_offset;
++ goto out;
++ }
++
++ /* Get the real value first, then modify as appropriate */
++ switch (size) {
++ case 1:
++ err = pci_read_config_byte(dev, offset, (u8 *) & value);
++ break;
++ case 2:
++ err = pci_read_config_word(dev, offset, (u16 *) & value);
++ break;
++ case 4:
++ err = pci_read_config_dword(dev, offset, &value);
++ break;
++ }
++
++ list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
++ field = cfg_entry->field;
++
++ req_start = offset;
++ req_end = offset + size;
++ field_start = OFFSET(cfg_entry);
++ field_end = OFFSET(cfg_entry) + field->size;
++
++ if ((req_start >= field_start && req_start < field_end)
++ || (req_end > field_start && req_end <= field_end)) {
++ err = conf_space_read(dev, cfg_entry, field_start,
++ &tmp_val);
++ if (err)
++ goto out;
++
++ value = merge_value(value, tmp_val,
++ get_mask(field->size),
++ field_start - req_start);
++ }
++ }
++
++ out:
++ if (unlikely(verbose_request))
++ printk(KERN_DEBUG "pciback: %s: read %d bytes at 0x%x = %x\n",
++ pci_name(dev), size, offset, value);
++
++ *ret_val = value;
++ return pcibios_err_to_errno(err);
++}
++
++int pciback_config_write(struct pci_dev *dev, int offset, int size, u32 value)
++{
++ int err = 0, handled = 0;
++ struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
++ const struct config_field_entry *cfg_entry;
++ const struct config_field *field;
++ u32 tmp_val;
++ int req_start, req_end, field_start, field_end;
++
++ if (unlikely(verbose_request))
++ printk(KERN_DEBUG
++ "pciback: %s: write request %d bytes at 0x%x = %x\n",
++ pci_name(dev), size, offset, value);
++
++ if (!valid_request(offset, size))
++ return XEN_PCI_ERR_invalid_offset;
++
++ list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
++ field = cfg_entry->field;
++
++ req_start = offset;
++ req_end = offset + size;
++ field_start = OFFSET(cfg_entry);
++ field_end = OFFSET(cfg_entry) + field->size;
++
++ if ((req_start >= field_start && req_start < field_end)
++ || (req_end > field_start && req_end <= field_end)) {
++ tmp_val = 0;
++
++ err = pciback_config_read(dev, field_start,
++ field->size, &tmp_val);
++ if (err)
++ break;
++
++ tmp_val = merge_value(tmp_val, value, get_mask(size),
++ req_start - field_start);
++
++ err = conf_space_write(dev, cfg_entry, field_start,
++ tmp_val);
++
++ /* handled is set true here, but not every byte
++ * may have been written! Properly detecting if
++ * every byte is handled is unnecessary as the
++ * flag is used to detect devices that need
++ * special helpers to work correctly.
++ */
++ handled = 1;
++ }
++ }
++
++ if (!handled && !err) {
++ /* By default, anything not specificially handled above is
++ * read-only. The permissive flag changes this behavior so
++ * that anything not specifically handled above is writable.
++ * This means that some fields may still be read-only because
++ * they have entries in the config_field list that intercept
++ * the write and do nothing. */
++ if (dev_data->permissive) {
++ switch (size) {
++ case 1:
++ err = pci_write_config_byte(dev, offset,
++ (u8) value);
++ break;
++ case 2:
++ err = pci_write_config_word(dev, offset,
++ (u16) value);
++ break;
++ case 4:
++ err = pci_write_config_dword(dev, offset,
++ (u32) value);
++ break;
++ }
++ } else if (!dev_data->warned_on_write) {
++ dev_data->warned_on_write = 1;
++ dev_warn(&dev->dev, "Driver tried to write to a "
++ "read-only configuration space field at offset "
++ "0x%x, size %d. This may be harmless, but if "
++ "you have problems with your device:\n"
++ "1) see permissive attribute in sysfs\n"
++ "2) report problems to the xen-devel "
++ "mailing list along with details of your "
++ "device obtained from lspci.\n", offset, size);
++ }
++ }
++
++ return pcibios_err_to_errno(err);
++}
++
++void pciback_config_free_dyn_fields(struct pci_dev *dev)
++{
++ struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
++ struct config_field_entry *cfg_entry, *t;
++ const struct config_field *field;
++
++ dev_dbg(&dev->dev,
++ "free-ing dynamically allocated virtual configuration space fields\n");
++
++ list_for_each_entry_safe(cfg_entry, t, &dev_data->config_fields, list) {
++ field = cfg_entry->field;
++
++ if (field->clean) {
++ field->clean((struct config_field *)field);
++
++ if (cfg_entry->data)
++ kfree(cfg_entry->data);
++
++ list_del(&cfg_entry->list);
++ kfree(cfg_entry);
++ }
++
++ }
++}
++
++void pciback_config_reset_dev(struct pci_dev *dev)
++{
++ struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
++ const struct config_field_entry *cfg_entry;
++ const struct config_field *field;
++
++ dev_dbg(&dev->dev, "resetting virtual configuration space\n");
++
++ list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
++ field = cfg_entry->field;
++
++ if (field->reset)
++ field->reset(dev, OFFSET(cfg_entry), cfg_entry->data);
++ }
++}
++
++void pciback_config_free_dev(struct pci_dev *dev)
++{
++ struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
++ struct config_field_entry *cfg_entry, *t;
++ const struct config_field *field;
++
++ dev_dbg(&dev->dev, "free-ing virtual configuration space fields\n");
++
++ list_for_each_entry_safe(cfg_entry, t, &dev_data->config_fields, list) {
++ list_del(&cfg_entry->list);
++
++ field = cfg_entry->field;
++
++ if (field->release)
++ field->release(dev, OFFSET(cfg_entry), cfg_entry->data);
++
++ kfree(cfg_entry);
++ }
++}
++
++int pciback_config_add_field_offset(struct pci_dev *dev,
++ const struct config_field *field,
++ unsigned int base_offset)
++{
++ int err = 0;
++ struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
++ struct config_field_entry *cfg_entry;
++ void *tmp;
++
++ cfg_entry = kmalloc(sizeof(*cfg_entry), GFP_KERNEL);
++ if (!cfg_entry) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ cfg_entry->data = NULL;
++ cfg_entry->field = field;
++ cfg_entry->base_offset = base_offset;
++
++ /* silently ignore duplicate fields */
++ err = pciback_field_is_dup(dev,OFFSET(cfg_entry));
++ if (err)
++ goto out;
++
++ if (field->init) {
++ tmp = field->init(dev, OFFSET(cfg_entry));
++
++ if (IS_ERR(tmp)) {
++ err = PTR_ERR(tmp);
++ goto out;
++ }
++
++ cfg_entry->data = tmp;
++ }
++
++ dev_dbg(&dev->dev, "added config field at offset 0x%02x\n",
++ OFFSET(cfg_entry));
++ list_add_tail(&cfg_entry->list, &dev_data->config_fields);
++
++ out:
++ if (err)
++ kfree(cfg_entry);
++
++ return err;
++}
++
++/* This sets up the device's virtual configuration space to keep track of
++ * certain registers (like the base address registers (BARs) so that we can
++ * keep the client from manipulating them directly.
++ */
++int pciback_config_init_dev(struct pci_dev *dev)
++{
++ int err = 0;
++ struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
++
++ dev_dbg(&dev->dev, "initializing virtual configuration space\n");
++
++ INIT_LIST_HEAD(&dev_data->config_fields);
++
++ err = pciback_config_header_add_fields(dev);
++ if (err)
++ goto out;
++
++ err = pciback_config_capability_add_fields(dev);
++ if (err)
++ goto out;
++
++ err = pciback_config_quirks_init(dev);
++
++ out:
++ return err;
++}
++
++int pciback_config_init(void)
++{
++ return pciback_config_capability_init();
++}
+Index: head-2008-11-25/drivers/xen/pciback/conf_space.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space.h 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,126 @@
++/*
++ * PCI Backend - Common data structures for overriding the configuration space
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#ifndef __XEN_PCIBACK_CONF_SPACE_H__
++#define __XEN_PCIBACK_CONF_SPACE_H__
++
++#include <linux/list.h>
++#include <linux/err.h>
++
++/* conf_field_init can return an errno in a ptr with ERR_PTR() */
++typedef void *(*conf_field_init) (struct pci_dev * dev, int offset);
++typedef void (*conf_field_reset) (struct pci_dev * dev, int offset, void *data);
++typedef void (*conf_field_free) (struct pci_dev * dev, int offset, void *data);
++
++typedef int (*conf_dword_write) (struct pci_dev * dev, int offset, u32 value,
++ void *data);
++typedef int (*conf_word_write) (struct pci_dev * dev, int offset, u16 value,
++ void *data);
++typedef int (*conf_byte_write) (struct pci_dev * dev, int offset, u8 value,
++ void *data);
++typedef int (*conf_dword_read) (struct pci_dev * dev, int offset, u32 * value,
++ void *data);
++typedef int (*conf_word_read) (struct pci_dev * dev, int offset, u16 * value,
++ void *data);
++typedef int (*conf_byte_read) (struct pci_dev * dev, int offset, u8 * value,
++ void *data);
++
++/* These are the fields within the configuration space which we
++ * are interested in intercepting reads/writes to and changing their
++ * values.
++ */
++struct config_field {
++ unsigned int offset;
++ unsigned int size;
++ unsigned int mask;
++ conf_field_init init;
++ conf_field_reset reset;
++ conf_field_free release;
++ void (*clean) (struct config_field * field);
++ union {
++ struct {
++ conf_dword_write write;
++ conf_dword_read read;
++ } dw;
++ struct {
++ conf_word_write write;
++ conf_word_read read;
++ } w;
++ struct {
++ conf_byte_write write;
++ conf_byte_read read;
++ } b;
++ } u;
++ struct list_head list;
++};
++
++struct config_field_entry {
++ struct list_head list;
++ const struct config_field *field;
++ unsigned int base_offset;
++ void *data;
++};
++
++#define OFFSET(cfg_entry) ((cfg_entry)->base_offset+(cfg_entry)->field->offset)
++
++/* Add fields to a device - the add_fields macro expects to get a pointer to
++ * the first entry in an array (of which the ending is marked by size==0)
++ */
++int pciback_config_add_field_offset(struct pci_dev *dev,
++ const struct config_field *field,
++ unsigned int offset);
++
++static inline int pciback_config_add_field(struct pci_dev *dev,
++ const struct config_field *field)
++{
++ return pciback_config_add_field_offset(dev, field, 0);
++}
++
++static inline int pciback_config_add_fields(struct pci_dev *dev,
++ const struct config_field *field)
++{
++ int i, err = 0;
++ for (i = 0; field[i].size != 0; i++) {
++ err = pciback_config_add_field(dev, &field[i]);
++ if (err)
++ break;
++ }
++ return err;
++}
++
++static inline int pciback_config_add_fields_offset(struct pci_dev *dev,
++ const struct config_field *field,
++ unsigned int offset)
++{
++ int i, err = 0;
++ for (i = 0; field[i].size != 0; i++) {
++ err = pciback_config_add_field_offset(dev, &field[i], offset);
++ if (err)
++ break;
++ }
++ return err;
++}
++
++/* Read/Write the real configuration space */
++int pciback_read_config_byte(struct pci_dev *dev, int offset, u8 * value,
++ void *data);
++int pciback_read_config_word(struct pci_dev *dev, int offset, u16 * value,
++ void *data);
++int pciback_read_config_dword(struct pci_dev *dev, int offset, u32 * value,
++ void *data);
++int pciback_write_config_byte(struct pci_dev *dev, int offset, u8 value,
++ void *data);
++int pciback_write_config_word(struct pci_dev *dev, int offset, u16 value,
++ void *data);
++int pciback_write_config_dword(struct pci_dev *dev, int offset, u32 value,
++ void *data);
++
++int pciback_config_capability_init(void);
++
++int pciback_config_header_add_fields(struct pci_dev *dev);
++int pciback_config_capability_add_fields(struct pci_dev *dev);
++
++#endif /* __XEN_PCIBACK_CONF_SPACE_H__ */
+Index: head-2008-11-25/drivers/xen/pciback/conf_space_capability.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space_capability.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,69 @@
++/*
++ * PCI Backend - Handles the virtual fields found on the capability lists
++ * in the configuration space.
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#include <linux/kernel.h>
++#include <linux/pci.h>
++#include "pciback.h"
++#include "conf_space.h"
++#include "conf_space_capability.h"
++
++static LIST_HEAD(capabilities);
++
++static const struct config_field caplist_header[] = {
++ {
++ .offset = PCI_CAP_LIST_ID,
++ .size = 2, /* encompass PCI_CAP_LIST_ID & PCI_CAP_LIST_NEXT */
++ .u.w.read = pciback_read_config_word,
++ .u.w.write = NULL,
++ },
++ {}
++};
++
++static inline void register_capability(struct pciback_config_capability *cap)
++{
++ list_add_tail(&cap->cap_list, &capabilities);
++}
++
++int pciback_config_capability_add_fields(struct pci_dev *dev)
++{
++ int err = 0;
++ struct pciback_config_capability *cap;
++ int cap_offset;
++
++ list_for_each_entry(cap, &capabilities, cap_list) {
++ cap_offset = pci_find_capability(dev, cap->capability);
++ if (cap_offset) {
++ dev_dbg(&dev->dev, "Found capability 0x%x at 0x%x\n",
++ cap->capability, cap_offset);
++
++ err = pciback_config_add_fields_offset(dev,
++ caplist_header,
++ cap_offset);
++ if (err)
++ goto out;
++ err = pciback_config_add_fields_offset(dev,
++ cap->fields,
++ cap_offset);
++ if (err)
++ goto out;
++ }
++ }
++
++ out:
++ return err;
++}
++
++extern struct pciback_config_capability pciback_config_capability_vpd;
++extern struct pciback_config_capability pciback_config_capability_pm;
++
++int pciback_config_capability_init(void)
++{
++ register_capability(&pciback_config_capability_vpd);
++ register_capability(&pciback_config_capability_pm);
++
++ return 0;
++}
+Index: head-2008-11-25/drivers/xen/pciback/conf_space_capability.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space_capability.h 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,23 @@
++/*
++ * PCI Backend - Data structures for special overlays for structures on
++ * the capability list.
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#ifndef __PCIBACK_CONFIG_CAPABILITY_H__
++#define __PCIBACK_CONFIG_CAPABILITY_H__
++
++#include <linux/pci.h>
++#include <linux/list.h>
++
++struct pciback_config_capability {
++ struct list_head cap_list;
++
++ int capability;
++
++ /* If the device has the capability found above, add these fields */
++ const struct config_field *fields;
++};
++
++#endif
+Index: head-2008-11-25/drivers/xen/pciback/conf_space_capability_msi.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space_capability_msi.c 2008-09-15 13:40:15.000000000 +0200
+@@ -0,0 +1,79 @@
++/*
++ * PCI Backend -- Configuration overlay for MSI capability
++ */
++#include <linux/pci.h>
++#include <linux/slab.h>
++#include "conf_space.h"
++#include "conf_space_capability.h"
++#include <xen/interface/io/pciif.h>
++#include "pciback.h"
++
++int pciback_enable_msi(struct pciback_device *pdev,
++ struct pci_dev *dev, struct xen_pci_op *op)
++{
++ int otherend = pdev->xdev->otherend_id;
++ int status;
++
++ status = pci_enable_msi(dev);
++
++ if (status) {
++ printk("error enable msi for guest %x status %x\n", otherend, status);
++ op->value = 0;
++ return XEN_PCI_ERR_op_failed;
++ }
++
++ op->value = dev->irq;
++ return 0;
++}
++
++int pciback_disable_msi(struct pciback_device *pdev,
++ struct pci_dev *dev, struct xen_pci_op *op)
++{
++ pci_disable_msi(dev);
++
++ op->value = dev->irq;
++ return 0;
++}
++
++int pciback_enable_msix(struct pciback_device *pdev,
++ struct pci_dev *dev, struct xen_pci_op *op)
++{
++ int i, result;
++ struct msix_entry *entries;
++
++ if (op->value > SH_INFO_MAX_VEC)
++ return -EINVAL;
++
++ entries = kmalloc(op->value * sizeof(*entries), GFP_KERNEL);
++ if (entries == NULL)
++ return -ENOMEM;
++
++ for (i = 0; i < op->value; i++) {
++ entries[i].entry = op->msix_entries[i].entry;
++ entries[i].vector = op->msix_entries[i].vector;
++ }
++
++ result = pci_enable_msix(dev, entries, op->value);
++
++ for (i = 0; i < op->value; i++) {
++ op->msix_entries[i].entry = entries[i].entry;
++ op->msix_entries[i].vector = entries[i].vector;
++ }
++
++ kfree(entries);
++
++ op->value = result;
++
++ return result;
++}
++
++int pciback_disable_msix(struct pciback_device *pdev,
++ struct pci_dev *dev, struct xen_pci_op *op)
++{
++
++ pci_disable_msix(dev);
++
++ op->value = dev->irq;
++ return 0;
++}
++
+Index: head-2008-11-25/drivers/xen/pciback/conf_space_capability_pm.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space_capability_pm.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,126 @@
++/*
++ * PCI Backend - Configuration space overlay for power management
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#include <linux/pci.h>
++#include "conf_space.h"
++#include "conf_space_capability.h"
++
++static int pm_caps_read(struct pci_dev *dev, int offset, u16 *value,
++ void *data)
++{
++ int err;
++ u16 real_value;
++
++ err = pci_read_config_word(dev, offset, &real_value);
++ if (err)
++ goto out;
++
++ *value = real_value & ~PCI_PM_CAP_PME_MASK;
++
++ out:
++ return err;
++}
++
++/* PM_OK_BITS specifies the bits that the driver domain is allowed to change.
++ * Can't allow driver domain to enable PMEs - they're shared */
++#define PM_OK_BITS (PCI_PM_CTRL_PME_STATUS|PCI_PM_CTRL_DATA_SEL_MASK)
++
++static int pm_ctrl_write(struct pci_dev *dev, int offset, u16 new_value,
++ void *data)
++{
++ int err;
++ u16 old_value;
++ pci_power_t new_state, old_state;
++
++ err = pci_read_config_word(dev, offset, &old_value);
++ if (err)
++ goto out;
++
++ old_state = (pci_power_t)(old_value & PCI_PM_CTRL_STATE_MASK);
++ new_state = (pci_power_t)(new_value & PCI_PM_CTRL_STATE_MASK);
++
++ new_value &= PM_OK_BITS;
++ if ((old_value & PM_OK_BITS) != new_value) {
++ new_value = (old_value & ~PM_OK_BITS) | new_value;
++ err = pci_write_config_word(dev, offset, new_value);
++ if (err)
++ goto out;
++ }
++
++ /* Let pci core handle the power management change */
++ dev_dbg(&dev->dev, "set power state to %x\n", new_state);
++ err = pci_set_power_state(dev, new_state);
++ if (err) {
++ err = PCIBIOS_SET_FAILED;
++ goto out;
++ }
++
++ /*
++ * Device may lose PCI config info on D3->D0 transition. This
++ * is a problem for some guests which will not reset BARs. Even
++ * those that have a go will be foiled by our BAR-write handler
++ * which will discard the write! Since Linux won't re-init
++ * the config space automatically in all cases, we do it here.
++ * Future: Should we re-initialise all first 64 bytes of config space?
++ */
++ if (new_state == PCI_D0 &&
++ (old_state == PCI_D3hot || old_state == PCI_D3cold) &&
++ !(old_value & PCI_PM_CTRL_NO_SOFT_RESET))
++ pci_restore_bars(dev);
++
++ out:
++ return err;
++}
++
++/* Ensure PMEs are disabled */
++static void *pm_ctrl_init(struct pci_dev *dev, int offset)
++{
++ int err;
++ u16 value;
++
++ err = pci_read_config_word(dev, offset, &value);
++ if (err)
++ goto out;
++
++ if (value & PCI_PM_CTRL_PME_ENABLE) {
++ value &= ~PCI_PM_CTRL_PME_ENABLE;
++ err = pci_write_config_word(dev, offset, value);
++ }
++
++ out:
++ return ERR_PTR(err);
++}
++
++static const struct config_field caplist_pm[] = {
++ {
++ .offset = PCI_PM_PMC,
++ .size = 2,
++ .u.w.read = pm_caps_read,
++ },
++ {
++ .offset = PCI_PM_CTRL,
++ .size = 2,
++ .init = pm_ctrl_init,
++ .u.w.read = pciback_read_config_word,
++ .u.w.write = pm_ctrl_write,
++ },
++ {
++ .offset = PCI_PM_PPB_EXTENSIONS,
++ .size = 1,
++ .u.b.read = pciback_read_config_byte,
++ },
++ {
++ .offset = PCI_PM_DATA_REGISTER,
++ .size = 1,
++ .u.b.read = pciback_read_config_byte,
++ },
++ {}
++};
++
++struct pciback_config_capability pciback_config_capability_pm = {
++ .capability = PCI_CAP_ID_PM,
++ .fields = caplist_pm,
++};
+Index: head-2008-11-25/drivers/xen/pciback/conf_space_capability_vpd.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space_capability_vpd.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,40 @@
++/*
++ * PCI Backend - Configuration space overlay for Vital Product Data
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#include <linux/pci.h>
++#include "conf_space.h"
++#include "conf_space_capability.h"
++
++static int vpd_address_write(struct pci_dev *dev, int offset, u16 value,
++ void *data)
++{
++ /* Disallow writes to the vital product data */
++ if (value & PCI_VPD_ADDR_F)
++ return PCIBIOS_SET_FAILED;
++ else
++ return pci_write_config_word(dev, offset, value);
++}
++
++static const struct config_field caplist_vpd[] = {
++ {
++ .offset = PCI_VPD_ADDR,
++ .size = 2,
++ .u.w.read = pciback_read_config_word,
++ .u.w.write = vpd_address_write,
++ },
++ {
++ .offset = PCI_VPD_DATA,
++ .size = 4,
++ .u.dw.read = pciback_read_config_dword,
++ .u.dw.write = NULL,
++ },
++ {}
++};
++
++struct pciback_config_capability pciback_config_capability_vpd = {
++ .capability = PCI_CAP_ID_VPD,
++ .fields = caplist_vpd,
++};
+Index: head-2008-11-25/drivers/xen/pciback/conf_space_header.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space_header.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,317 @@
++/*
++ * PCI Backend - Handles the virtual fields in the configuration space headers.
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#include <linux/kernel.h>
++#include <linux/pci.h>
++#include "pciback.h"
++#include "conf_space.h"
++
++struct pci_bar_info {
++ u32 val;
++ u32 len_val;
++ int which;
++};
++
++#define is_enable_cmd(value) ((value)&(PCI_COMMAND_MEMORY|PCI_COMMAND_IO))
++#define is_master_cmd(value) ((value)&PCI_COMMAND_MASTER)
++
++static int command_write(struct pci_dev *dev, int offset, u16 value, void *data)
++{
++ int err;
++
++ if (!dev->is_enabled && is_enable_cmd(value)) {
++ if (unlikely(verbose_request))
++ printk(KERN_DEBUG "pciback: %s: enable\n",
++ pci_name(dev));
++ err = pci_enable_device(dev);
++ if (err)
++ return err;
++ } else if (dev->is_enabled && !is_enable_cmd(value)) {
++ if (unlikely(verbose_request))
++ printk(KERN_DEBUG "pciback: %s: disable\n",
++ pci_name(dev));
++ pci_disable_device(dev);
++ }
++
++ if (!dev->is_busmaster && is_master_cmd(value)) {
++ if (unlikely(verbose_request))
++ printk(KERN_DEBUG "pciback: %s: set bus master\n",
++ pci_name(dev));
++ pci_set_master(dev);
++ }
++
++ if (value & PCI_COMMAND_INVALIDATE) {
++ if (unlikely(verbose_request))
++ printk(KERN_DEBUG
++ "pciback: %s: enable memory-write-invalidate\n",
++ pci_name(dev));
++ err = pci_set_mwi(dev);
++ if (err) {
++ printk(KERN_WARNING
++ "pciback: %s: cannot enable memory-write-invalidate (%d)\n",
++ pci_name(dev), err);
++ value &= ~PCI_COMMAND_INVALIDATE;
++ }
++ }
++
++ return pci_write_config_word(dev, offset, value);
++}
++
++static int rom_write(struct pci_dev *dev, int offset, u32 value, void *data)
++{
++ struct pci_bar_info *bar = data;
++
++ if (unlikely(!bar)) {
++ printk(KERN_WARNING "pciback: driver data not found for %s\n",
++ pci_name(dev));
++ return XEN_PCI_ERR_op_failed;
++ }
++
++ /* A write to obtain the length must happen as a 32-bit write.
++ * This does not (yet) support writing individual bytes
++ */
++ if (value == ~PCI_ROM_ADDRESS_ENABLE)
++ bar->which = 1;
++ else {
++ u32 tmpval;
++ pci_read_config_dword(dev, offset, &tmpval);
++ if (tmpval != bar->val && value == bar->val) {
++ /* Allow restoration of bar value. */
++ pci_write_config_dword(dev, offset, bar->val);
++ }
++ bar->which = 0;
++ }
++
++ /* Do we need to support enabling/disabling the rom address here? */
++
++ return 0;
++}
++
++/* For the BARs, only allow writes which write ~0 or
++ * the correct resource information
++ * (Needed for when the driver probes the resource usage)
++ */
++static int bar_write(struct pci_dev *dev, int offset, u32 value, void *data)
++{
++ struct pci_bar_info *bar = data;
++
++ if (unlikely(!bar)) {
++ printk(KERN_WARNING "pciback: driver data not found for %s\n",
++ pci_name(dev));
++ return XEN_PCI_ERR_op_failed;
++ }
++
++ /* A write to obtain the length must happen as a 32-bit write.
++ * This does not (yet) support writing individual bytes
++ */
++ if (value == ~0)
++ bar->which = 1;
++ else {
++ u32 tmpval;
++ pci_read_config_dword(dev, offset, &tmpval);
++ if (tmpval != bar->val && value == bar->val) {
++ /* Allow restoration of bar value. */
++ pci_write_config_dword(dev, offset, bar->val);
++ }
++ bar->which = 0;
++ }
++
++ return 0;
++}
++
++static int bar_read(struct pci_dev *dev, int offset, u32 * value, void *data)
++{
++ struct pci_bar_info *bar = data;
++
++ if (unlikely(!bar)) {
++ printk(KERN_WARNING "pciback: driver data not found for %s\n",
++ pci_name(dev));
++ return XEN_PCI_ERR_op_failed;
++ }
++
++ *value = bar->which ? bar->len_val : bar->val;
++
++ return 0;
++}
++
++static inline void read_dev_bar(struct pci_dev *dev,
++ struct pci_bar_info *bar_info, int offset,
++ u32 len_mask)
++{
++ pci_read_config_dword(dev, offset, &bar_info->val);
++ pci_write_config_dword(dev, offset, len_mask);
++ pci_read_config_dword(dev, offset, &bar_info->len_val);
++ pci_write_config_dword(dev, offset, bar_info->val);
++}
++
++static void *bar_init(struct pci_dev *dev, int offset)
++{
++ struct pci_bar_info *bar = kmalloc(sizeof(*bar), GFP_KERNEL);
++
++ if (!bar)
++ return ERR_PTR(-ENOMEM);
++
++ read_dev_bar(dev, bar, offset, ~0);
++ bar->which = 0;
++
++ return bar;
++}
++
++static void *rom_init(struct pci_dev *dev, int offset)
++{
++ struct pci_bar_info *bar = kmalloc(sizeof(*bar), GFP_KERNEL);
++
++ if (!bar)
++ return ERR_PTR(-ENOMEM);
++
++ read_dev_bar(dev, bar, offset, ~PCI_ROM_ADDRESS_ENABLE);
++ bar->which = 0;
++
++ return bar;
++}
++
++static void bar_reset(struct pci_dev *dev, int offset, void *data)
++{
++ struct pci_bar_info *bar = data;
++
++ bar->which = 0;
++}
++
++static void bar_release(struct pci_dev *dev, int offset, void *data)
++{
++ kfree(data);
++}
++
++static int interrupt_read(struct pci_dev *dev, int offset, u8 * value,
++ void *data)
++{
++ *value = (u8) dev->irq;
++
++ return 0;
++}
++
++static int bist_write(struct pci_dev *dev, int offset, u8 value, void *data)
++{
++ u8 cur_value;
++ int err;
++
++ err = pci_read_config_byte(dev, offset, &cur_value);
++ if (err)
++ goto out;
++
++ if ((cur_value & ~PCI_BIST_START) == (value & ~PCI_BIST_START)
++ || value == PCI_BIST_START)
++ err = pci_write_config_byte(dev, offset, value);
++
++ out:
++ return err;
++}
++
++static const struct config_field header_common[] = {
++ {
++ .offset = PCI_COMMAND,
++ .size = 2,
++ .u.w.read = pciback_read_config_word,
++ .u.w.write = command_write,
++ },
++ {
++ .offset = PCI_INTERRUPT_LINE,
++ .size = 1,
++ .u.b.read = interrupt_read,
++ },
++ {
++ .offset = PCI_INTERRUPT_PIN,
++ .size = 1,
++ .u.b.read = pciback_read_config_byte,
++ },
++ {
++ /* Any side effects of letting driver domain control cache line? */
++ .offset = PCI_CACHE_LINE_SIZE,
++ .size = 1,
++ .u.b.read = pciback_read_config_byte,
++ .u.b.write = pciback_write_config_byte,
++ },
++ {
++ .offset = PCI_LATENCY_TIMER,
++ .size = 1,
++ .u.b.read = pciback_read_config_byte,
++ },
++ {
++ .offset = PCI_BIST,
++ .size = 1,
++ .u.b.read = pciback_read_config_byte,
++ .u.b.write = bist_write,
++ },
++ {}
++};
++
++#define CFG_FIELD_BAR(reg_offset) \
++ { \
++ .offset = reg_offset, \
++ .size = 4, \
++ .init = bar_init, \
++ .reset = bar_reset, \
++ .release = bar_release, \
++ .u.dw.read = bar_read, \
++ .u.dw.write = bar_write, \
++ }
++
++#define CFG_FIELD_ROM(reg_offset) \
++ { \
++ .offset = reg_offset, \
++ .size = 4, \
++ .init = rom_init, \
++ .reset = bar_reset, \
++ .release = bar_release, \
++ .u.dw.read = bar_read, \
++ .u.dw.write = rom_write, \
++ }
++
++static const struct config_field header_0[] = {
++ CFG_FIELD_BAR(PCI_BASE_ADDRESS_0),
++ CFG_FIELD_BAR(PCI_BASE_ADDRESS_1),
++ CFG_FIELD_BAR(PCI_BASE_ADDRESS_2),
++ CFG_FIELD_BAR(PCI_BASE_ADDRESS_3),
++ CFG_FIELD_BAR(PCI_BASE_ADDRESS_4),
++ CFG_FIELD_BAR(PCI_BASE_ADDRESS_5),
++ CFG_FIELD_ROM(PCI_ROM_ADDRESS),
++ {}
++};
++
++static const struct config_field header_1[] = {
++ CFG_FIELD_BAR(PCI_BASE_ADDRESS_0),
++ CFG_FIELD_BAR(PCI_BASE_ADDRESS_1),
++ CFG_FIELD_ROM(PCI_ROM_ADDRESS1),
++ {}
++};
++
++int pciback_config_header_add_fields(struct pci_dev *dev)
++{
++ int err;
++
++ err = pciback_config_add_fields(dev, header_common);
++ if (err)
++ goto out;
++
++ switch (dev->hdr_type) {
++ case PCI_HEADER_TYPE_NORMAL:
++ err = pciback_config_add_fields(dev, header_0);
++ break;
++
++ case PCI_HEADER_TYPE_BRIDGE:
++ err = pciback_config_add_fields(dev, header_1);
++ break;
++
++ default:
++ err = -EINVAL;
++ printk(KERN_ERR "pciback: %s: Unsupported header type %d!\n",
++ pci_name(dev), dev->hdr_type);
++ break;
++ }
++
++ out:
++ return err;
++}
+Index: head-2008-11-25/drivers/xen/pciback/conf_space_quirks.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space_quirks.c 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,126 @@
++/*
++ * PCI Backend - Handle special overlays for broken devices.
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ * Author: Chris Bookholt <hap10@epoch.ncsc.mil>
++ */
++
++#include <linux/kernel.h>
++#include <linux/pci.h>
++#include "pciback.h"
++#include "conf_space.h"
++#include "conf_space_quirks.h"
++
++LIST_HEAD(pciback_quirks);
++
++struct pciback_config_quirk *pciback_find_quirk(struct pci_dev *dev)
++{
++ struct pciback_config_quirk *tmp_quirk;
++
++ list_for_each_entry(tmp_quirk, &pciback_quirks, quirks_list)
++ if (pci_match_id(&tmp_quirk->devid, dev))
++ goto out;
++ tmp_quirk = NULL;
++ printk(KERN_DEBUG
++ "quirk didn't match any device pciback knows about\n");
++ out:
++ return tmp_quirk;
++}
++
++static inline void register_quirk(struct pciback_config_quirk *quirk)
++{
++ list_add_tail(&quirk->quirks_list, &pciback_quirks);
++}
++
++int pciback_field_is_dup(struct pci_dev *dev, unsigned int reg)
++{
++ int ret = 0;
++ struct pciback_dev_data *dev_data = pci_get_drvdata(dev);
++ struct config_field_entry *cfg_entry;
++
++ list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
++ if ( OFFSET(cfg_entry) == reg) {
++ ret = 1;
++ break;
++ }
++ }
++ return ret;
++}
++
++int pciback_config_quirks_add_field(struct pci_dev *dev, struct config_field
++ *field)
++{
++ int err = 0;
++
++ switch (field->size) {
++ case 1:
++ field->u.b.read = pciback_read_config_byte;
++ field->u.b.write = pciback_write_config_byte;
++ break;
++ case 2:
++ field->u.w.read = pciback_read_config_word;
++ field->u.w.write = pciback_write_config_word;
++ break;
++ case 4:
++ field->u.dw.read = pciback_read_config_dword;
++ field->u.dw.write = pciback_write_config_dword;
++ break;
++ default:
++ err = -EINVAL;
++ goto out;
++ }
++
++ pciback_config_add_field(dev, field);
++
++ out:
++ return err;
++}
++
++int pciback_config_quirks_init(struct pci_dev *dev)
++{
++ struct pciback_config_quirk *quirk;
++ int ret = 0;
++
++ quirk = kzalloc(sizeof(*quirk), GFP_ATOMIC);
++ if (!quirk) {
++ ret = -ENOMEM;
++ goto out;
++ }
++
++ quirk->devid.vendor = dev->vendor;
++ quirk->devid.device = dev->device;
++ quirk->devid.subvendor = dev->subsystem_vendor;
++ quirk->devid.subdevice = dev->subsystem_device;
++ quirk->devid.class = 0;
++ quirk->devid.class_mask = 0;
++ quirk->devid.driver_data = 0UL;
++
++ quirk->pdev = dev;
++
++ register_quirk(quirk);
++ out:
++ return ret;
++}
++
++void pciback_config_field_free(struct config_field *field)
++{
++ kfree(field);
++}
++
++int pciback_config_quirk_release(struct pci_dev *dev)
++{
++ struct pciback_config_quirk *quirk;
++ int ret = 0;
++
++ quirk = pciback_find_quirk(dev);
++ if (!quirk) {
++ ret = -ENXIO;
++ goto out;
++ }
++
++ list_del(&quirk->quirks_list);
++ kfree(quirk);
++
++ out:
++ return ret;
++}
+Index: head-2008-11-25/drivers/xen/pciback/conf_space_quirks.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/conf_space_quirks.h 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,35 @@
++/*
++ * PCI Backend - Data structures for special overlays for broken devices.
++ *
++ * Ryan Wilson <hap9@epoch.ncsc.mil>
++ * Chris Bookholt <hap10@epoch.ncsc.mil>
++ */
++
++#ifndef __XEN_PCIBACK_CONF_SPACE_QUIRKS_H__
++#define __XEN_PCIBACK_CONF_SPACE_QUIRKS_H__
++
++#include <linux/pci.h>
++#include <linux/list.h>
++
++struct pciback_config_quirk {
++ struct list_head quirks_list;
++ struct pci_device_id devid;
++ struct pci_dev *pdev;
++};
++
++struct pciback_config_quirk *pciback_find_quirk(struct pci_dev *dev);
++
++int pciback_config_quirks_add_field(struct pci_dev *dev, struct config_field
++ *field);
++
++int pciback_config_quirks_remove_field(struct pci_dev *dev, int reg);
++
++int pciback_config_quirks_init(struct pci_dev *dev);
++
++void pciback_config_field_free(struct config_field *field);
++
++int pciback_config_quirk_release(struct pci_dev *dev);
++
++int pciback_field_is_dup(struct pci_dev *dev, unsigned int reg);
++
++#endif
+Index: head-2008-11-25/drivers/xen/pciback/controller.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/controller.c 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,408 @@
++/*
++ * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
++ * Alex Williamson <alex.williamson@hp.com>
++ *
++ * PCI "Controller" Backend - virtualize PCI bus topology based on PCI
++ * controllers. Devices under the same PCI controller are exposed on the
++ * same virtual domain:bus. Within a bus, device slots are virtualized
++ * to compact the bus.
++ *
++ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
++ */
++
++#include <linux/acpi.h>
++#include <linux/list.h>
++#include <linux/pci.h>
++#include <linux/spinlock.h>
++#include "pciback.h"
++
++#define PCI_MAX_BUSSES 255
++#define PCI_MAX_SLOTS 32
++
++struct controller_dev_entry {
++ struct list_head list;
++ struct pci_dev *dev;
++ unsigned int devfn;
++};
++
++struct controller_list_entry {
++ struct list_head list;
++ struct pci_controller *controller;
++ unsigned int domain;
++ unsigned int bus;
++ unsigned int next_devfn;
++ struct list_head dev_list;
++};
++
++struct controller_dev_data {
++ struct list_head list;
++ unsigned int next_domain;
++ unsigned int next_bus;
++ spinlock_t lock;
++};
++
++struct walk_info {
++ struct pciback_device *pdev;
++ int resource_count;
++ int root_num;
++};
++
++struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
++ unsigned int domain, unsigned int bus,
++ unsigned int devfn)
++{
++ struct controller_dev_data *dev_data = pdev->pci_dev_data;
++ struct controller_dev_entry *dev_entry;
++ struct controller_list_entry *cntrl_entry;
++ struct pci_dev *dev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&dev_data->lock, flags);
++
++ list_for_each_entry(cntrl_entry, &dev_data->list, list) {
++ if (cntrl_entry->domain != domain ||
++ cntrl_entry->bus != bus)
++ continue;
++
++ list_for_each_entry(dev_entry, &cntrl_entry->dev_list, list) {
++ if (devfn == dev_entry->devfn) {
++ dev = dev_entry->dev;
++ goto found;
++ }
++ }
++ }
++found:
++ spin_unlock_irqrestore(&dev_data->lock, flags);
++
++ return dev;
++}
++
++int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
++ int devid, publish_pci_dev_cb publish_cb)
++{
++ struct controller_dev_data *dev_data = pdev->pci_dev_data;
++ struct controller_dev_entry *dev_entry;
++ struct controller_list_entry *cntrl_entry;
++ struct pci_controller *dev_controller = PCI_CONTROLLER(dev);
++ unsigned long flags;
++ int ret = 0, found = 0;
++
++ spin_lock_irqsave(&dev_data->lock, flags);
++
++ /* Look to see if we already have a domain:bus for this controller */
++ list_for_each_entry(cntrl_entry, &dev_data->list, list) {
++ if (cntrl_entry->controller == dev_controller) {
++ found = 1;
++ break;
++ }
++ }
++
++ if (!found) {
++ cntrl_entry = kmalloc(sizeof(*cntrl_entry), GFP_ATOMIC);
++ if (!cntrl_entry) {
++ ret = -ENOMEM;
++ goto out;
++ }
++
++ cntrl_entry->controller = dev_controller;
++ cntrl_entry->next_devfn = PCI_DEVFN(0, 0);
++
++ cntrl_entry->domain = dev_data->next_domain;
++ cntrl_entry->bus = dev_data->next_bus++;
++ if (dev_data->next_bus > PCI_MAX_BUSSES) {
++ dev_data->next_domain++;
++ dev_data->next_bus = 0;
++ }
++
++ INIT_LIST_HEAD(&cntrl_entry->dev_list);
++
++ list_add_tail(&cntrl_entry->list, &dev_data->list);
++ }
++
++ if (PCI_SLOT(cntrl_entry->next_devfn) > PCI_MAX_SLOTS) {
++ /*
++ * While it seems unlikely, this can actually happen if
++ * a controller has P2P bridges under it.
++ */
++ xenbus_dev_fatal(pdev->xdev, -ENOSPC, "Virtual bus %04x:%02x "
++ "is full, no room to export %04x:%02x:%02x.%x",
++ cntrl_entry->domain, cntrl_entry->bus,
++ pci_domain_nr(dev->bus), dev->bus->number,
++ PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
++ ret = -ENOSPC;
++ goto out;
++ }
++
++ dev_entry = kmalloc(sizeof(*dev_entry), GFP_ATOMIC);
++ if (!dev_entry) {
++ if (list_empty(&cntrl_entry->dev_list)) {
++ list_del(&cntrl_entry->list);
++ kfree(cntrl_entry);
++ }
++ ret = -ENOMEM;
++ goto out;
++ }
++
++ dev_entry->dev = dev;
++ dev_entry->devfn = cntrl_entry->next_devfn;
++
++ list_add_tail(&dev_entry->list, &cntrl_entry->dev_list);
++
++ cntrl_entry->next_devfn += PCI_DEVFN(1, 0);
++
++out:
++ spin_unlock_irqrestore(&dev_data->lock, flags);
++
++ /* TODO: Publish virtual domain:bus:slot.func here. */
++
++ return ret;
++}
++
++void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev)
++{
++ struct controller_dev_data *dev_data = pdev->pci_dev_data;
++ struct controller_list_entry *cntrl_entry;
++ struct controller_dev_entry *dev_entry = NULL;
++ struct pci_dev *found_dev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&dev_data->lock, flags);
++
++ list_for_each_entry(cntrl_entry, &dev_data->list, list) {
++ if (cntrl_entry->controller != PCI_CONTROLLER(dev))
++ continue;
++
++ list_for_each_entry(dev_entry, &cntrl_entry->dev_list, list) {
++ if (dev_entry->dev == dev) {
++ found_dev = dev_entry->dev;
++ break;
++ }
++ }
++ }
++
++ if (!found_dev) {
++ spin_unlock_irqrestore(&dev_data->lock, flags);
++ return;
++ }
++
++ list_del(&dev_entry->list);
++ kfree(dev_entry);
++
++ if (list_empty(&cntrl_entry->dev_list)) {
++ list_del(&cntrl_entry->list);
++ kfree(cntrl_entry);
++ }
++
++ spin_unlock_irqrestore(&dev_data->lock, flags);
++ pcistub_put_pci_dev(found_dev);
++}
++
++int pciback_init_devices(struct pciback_device *pdev)
++{
++ struct controller_dev_data *dev_data;
++
++ dev_data = kmalloc(sizeof(*dev_data), GFP_KERNEL);
++ if (!dev_data)
++ return -ENOMEM;
++
++ spin_lock_init(&dev_data->lock);
++
++ INIT_LIST_HEAD(&dev_data->list);
++
++ /* Starting domain:bus numbers */
++ dev_data->next_domain = 0;
++ dev_data->next_bus = 0;
++
++ pdev->pci_dev_data = dev_data;
++
++ return 0;
++}
++
++static acpi_status write_xenbus_resource(struct acpi_resource *res, void *data)
++{
++ struct walk_info *info = data;
++ struct acpi_resource_address64 addr;
++ acpi_status status;
++ int i, len, err;
++ char str[32], tmp[3];
++ unsigned char *ptr, *buf;
++
++ status = acpi_resource_to_address64(res, &addr);
++
++ /* Do we care about this range? Let's check. */
++ if (!ACPI_SUCCESS(status) ||
++ !(addr.resource_type == ACPI_MEMORY_RANGE ||
++ addr.resource_type == ACPI_IO_RANGE) ||
++ !addr.address_length || addr.producer_consumer != ACPI_PRODUCER)
++ return AE_OK;
++
++ /*
++ * Furthermore, we really only care to tell the guest about
++ * address ranges that require address translation of some sort.
++ */
++ if (!(addr.resource_type == ACPI_MEMORY_RANGE &&
++ addr.info.mem.translation) &&
++ !(addr.resource_type == ACPI_IO_RANGE &&
++ addr.info.io.translation))
++ return AE_OK;
++
++ /* Store the resource in xenbus for the guest */
++ len = snprintf(str, sizeof(str), "root-%d-resource-%d",
++ info->root_num, info->resource_count);
++ if (unlikely(len >= (sizeof(str) - 1)))
++ return AE_OK;
++
++ buf = kzalloc((sizeof(*res) * 2) + 1, GFP_KERNEL);
++ if (!buf)
++ return AE_OK;
++
++ /* Clean out resource_source */
++ res->data.address64.resource_source.index = 0xFF;
++ res->data.address64.resource_source.string_length = 0;
++ res->data.address64.resource_source.string_ptr = NULL;
++
++ ptr = (unsigned char *)res;
++
++ /* Turn the acpi_resource into an ASCII byte stream */
++ for (i = 0; i < sizeof(*res); i++) {
++ snprintf(tmp, sizeof(tmp), "%02x", ptr[i]);
++ strncat(buf, tmp, 2);
++ }
++
++ err = xenbus_printf(XBT_NIL, info->pdev->xdev->nodename,
++ str, "%s", buf);
++
++ if (!err)
++ info->resource_count++;
++
++ kfree(buf);
++
++ return AE_OK;
++}
++
++int pciback_publish_pci_roots(struct pciback_device *pdev,
++ publish_pci_root_cb publish_root_cb)
++{
++ struct controller_dev_data *dev_data = pdev->pci_dev_data;
++ struct controller_list_entry *cntrl_entry;
++ int i, root_num, len, err = 0;
++ unsigned int domain, bus;
++ char str[64];
++ struct walk_info info;
++
++ spin_lock(&dev_data->lock);
++
++ list_for_each_entry(cntrl_entry, &dev_data->list, list) {
++ /* First publish all the domain:bus info */
++ err = publish_root_cb(pdev, cntrl_entry->domain,
++ cntrl_entry->bus);
++ if (err)
++ goto out;
++
++ /*
++ * Now figure out which root-%d this belongs to
++ * so we can associate resources with it.
++ */
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename,
++ "root_num", "%d", &root_num);
++
++ if (err != 1)
++ goto out;
++
++ for (i = 0; i < root_num; i++) {
++ len = snprintf(str, sizeof(str), "root-%d", i);
++ if (unlikely(len >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename,
++ str, "%x:%x", &domain, &bus);
++ if (err != 2)
++ goto out;
++
++ /* Is this the one we just published? */
++ if (domain == cntrl_entry->domain &&
++ bus == cntrl_entry->bus)
++ break;
++ }
++
++ if (i == root_num)
++ goto out;
++
++ info.pdev = pdev;
++ info.resource_count = 0;
++ info.root_num = i;
++
++ /* Let ACPI do the heavy lifting on decoding resources */
++ acpi_walk_resources(cntrl_entry->controller->acpi_handle,
++ METHOD_NAME__CRS, write_xenbus_resource,
++ &info);
++
++ /* No resouces. OK. On to the next one */
++ if (!info.resource_count)
++ continue;
++
++ /* Store the number of resources we wrote for this root-%d */
++ len = snprintf(str, sizeof(str), "root-%d-resources", i);
++ if (unlikely(len >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ err = xenbus_printf(XBT_NIL, pdev->xdev->nodename, str,
++ "%d", info.resource_count);
++ if (err)
++ goto out;
++ }
++
++ /* Finally, write some magic to synchronize with the guest. */
++ len = snprintf(str, sizeof(str), "root-resource-magic");
++ if (unlikely(len >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ err = xenbus_printf(XBT_NIL, pdev->xdev->nodename, str,
++ "%lx", (sizeof(struct acpi_resource) * 2) + 1);
++
++out:
++ spin_unlock(&dev_data->lock);
++
++ return err;
++}
++
++void pciback_release_devices(struct pciback_device *pdev)
++{
++ struct controller_dev_data *dev_data = pdev->pci_dev_data;
++ struct controller_list_entry *cntrl_entry, *c;
++ struct controller_dev_entry *dev_entry, *d;
++
++ list_for_each_entry_safe(cntrl_entry, c, &dev_data->list, list) {
++ list_for_each_entry_safe(dev_entry, d,
++ &cntrl_entry->dev_list, list) {
++ list_del(&dev_entry->list);
++ pcistub_put_pci_dev(dev_entry->dev);
++ kfree(dev_entry);
++ }
++ list_del(&cntrl_entry->list);
++ kfree(cntrl_entry);
++ }
++
++ kfree(dev_data);
++ pdev->pci_dev_data = NULL;
++}
+Index: head-2008-11-25/drivers/xen/pciback/passthrough.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/passthrough.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,166 @@
++/*
++ * PCI Backend - Provides restricted access to the real PCI bus topology
++ * to the frontend
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#include <linux/list.h>
++#include <linux/pci.h>
++#include <linux/spinlock.h>
++#include "pciback.h"
++
++struct passthrough_dev_data {
++ /* Access to dev_list must be protected by lock */
++ struct list_head dev_list;
++ spinlock_t lock;
++};
++
++struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
++ unsigned int domain, unsigned int bus,
++ unsigned int devfn)
++{
++ struct passthrough_dev_data *dev_data = pdev->pci_dev_data;
++ struct pci_dev_entry *dev_entry;
++ struct pci_dev *dev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&dev_data->lock, flags);
++
++ list_for_each_entry(dev_entry, &dev_data->dev_list, list) {
++ if (domain == (unsigned int)pci_domain_nr(dev_entry->dev->bus)
++ && bus == (unsigned int)dev_entry->dev->bus->number
++ && devfn == dev_entry->dev->devfn) {
++ dev = dev_entry->dev;
++ break;
++ }
++ }
++
++ spin_unlock_irqrestore(&dev_data->lock, flags);
++
++ return dev;
++}
++
++int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
++ int devid, publish_pci_dev_cb publish_cb)
++{
++ struct passthrough_dev_data *dev_data = pdev->pci_dev_data;
++ struct pci_dev_entry *dev_entry;
++ unsigned long flags;
++ unsigned int domain, bus, devfn;
++ int err;
++
++ dev_entry = kmalloc(sizeof(*dev_entry), GFP_KERNEL);
++ if (!dev_entry)
++ return -ENOMEM;
++ dev_entry->dev = dev;
++
++ spin_lock_irqsave(&dev_data->lock, flags);
++ list_add_tail(&dev_entry->list, &dev_data->dev_list);
++ spin_unlock_irqrestore(&dev_data->lock, flags);
++
++ /* Publish this device. */
++ domain = (unsigned int)pci_domain_nr(dev->bus);
++ bus = (unsigned int)dev->bus->number;
++ devfn = dev->devfn;
++ err = publish_cb(pdev, domain, bus, devfn, devid);
++
++ return err;
++}
++
++void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev)
++{
++ struct passthrough_dev_data *dev_data = pdev->pci_dev_data;
++ struct pci_dev_entry *dev_entry, *t;
++ struct pci_dev *found_dev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&dev_data->lock, flags);
++
++ list_for_each_entry_safe(dev_entry, t, &dev_data->dev_list, list) {
++ if (dev_entry->dev == dev) {
++ list_del(&dev_entry->list);
++ found_dev = dev_entry->dev;
++ kfree(dev_entry);
++ }
++ }
++
++ spin_unlock_irqrestore(&dev_data->lock, flags);
++
++ if (found_dev)
++ pcistub_put_pci_dev(found_dev);
++}
++
++int pciback_init_devices(struct pciback_device *pdev)
++{
++ struct passthrough_dev_data *dev_data;
++
++ dev_data = kmalloc(sizeof(*dev_data), GFP_KERNEL);
++ if (!dev_data)
++ return -ENOMEM;
++
++ spin_lock_init(&dev_data->lock);
++
++ INIT_LIST_HEAD(&dev_data->dev_list);
++
++ pdev->pci_dev_data = dev_data;
++
++ return 0;
++}
++
++int pciback_publish_pci_roots(struct pciback_device *pdev,
++ publish_pci_root_cb publish_root_cb)
++{
++ int err = 0;
++ struct passthrough_dev_data *dev_data = pdev->pci_dev_data;
++ struct pci_dev_entry *dev_entry, *e;
++ struct pci_dev *dev;
++ int found;
++ unsigned int domain, bus;
++
++ spin_lock(&dev_data->lock);
++
++ list_for_each_entry(dev_entry, &dev_data->dev_list, list) {
++ /* Only publish this device as a root if none of its
++ * parent bridges are exported
++ */
++ found = 0;
++ dev = dev_entry->dev->bus->self;
++ for (; !found && dev != NULL; dev = dev->bus->self) {
++ list_for_each_entry(e, &dev_data->dev_list, list) {
++ if (dev == e->dev) {
++ found = 1;
++ break;
++ }
++ }
++ }
++
++ domain = (unsigned int)pci_domain_nr(dev_entry->dev->bus);
++ bus = (unsigned int)dev_entry->dev->bus->number;
++
++ if (!found) {
++ err = publish_root_cb(pdev, domain, bus);
++ if (err)
++ break;
++ }
++ }
++
++ spin_unlock(&dev_data->lock);
++
++ return err;
++}
++
++void pciback_release_devices(struct pciback_device *pdev)
++{
++ struct passthrough_dev_data *dev_data = pdev->pci_dev_data;
++ struct pci_dev_entry *dev_entry, *t;
++
++ list_for_each_entry_safe(dev_entry, t, &dev_data->dev_list, list) {
++ list_del(&dev_entry->list);
++ pcistub_put_pci_dev(dev_entry->dev);
++ kfree(dev_entry);
++ }
++
++ kfree(dev_data);
++ pdev->pci_dev_data = NULL;
++}
+Index: head-2008-11-25/drivers/xen/pciback/pci_stub.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/pci_stub.c 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,948 @@
++/*
++ * PCI Stub Driver - Grabs devices in backend to be exported later
++ *
++ * Ryan Wilson <hap9@epoch.ncsc.mil>
++ * Chris Bookholt <hap10@epoch.ncsc.mil>
++ */
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/spinlock.h>
++#include <linux/kref.h>
++#include <asm/atomic.h>
++#include "pciback.h"
++#include "conf_space.h"
++#include "conf_space_quirks.h"
++
++static char *pci_devs_to_hide = NULL;
++module_param_named(hide, pci_devs_to_hide, charp, 0444);
++
++struct pcistub_device_id {
++ struct list_head slot_list;
++ int domain;
++ unsigned char bus;
++ unsigned int devfn;
++};
++static LIST_HEAD(pcistub_device_ids);
++static DEFINE_SPINLOCK(device_ids_lock);
++
++struct pcistub_device {
++ struct kref kref;
++ struct list_head dev_list;
++ spinlock_t lock;
++
++ struct pci_dev *dev;
++ struct pciback_device *pdev; /* non-NULL if struct pci_dev is in use */
++};
++
++/* Access to pcistub_devices & seized_devices lists and the initialize_devices
++ * flag must be locked with pcistub_devices_lock
++ */
++static DEFINE_SPINLOCK(pcistub_devices_lock);
++static LIST_HEAD(pcistub_devices);
++
++/* wait for device_initcall before initializing our devices
++ * (see pcistub_init_devices_late)
++ */
++static int initialize_devices = 0;
++static LIST_HEAD(seized_devices);
++
++static struct pcistub_device *pcistub_device_alloc(struct pci_dev *dev)
++{
++ struct pcistub_device *psdev;
++
++ dev_dbg(&dev->dev, "pcistub_device_alloc\n");
++
++ psdev = kzalloc(sizeof(*psdev), GFP_ATOMIC);
++ if (!psdev)
++ return NULL;
++
++ psdev->dev = pci_dev_get(dev);
++ if (!psdev->dev) {
++ kfree(psdev);
++ return NULL;
++ }
++
++ kref_init(&psdev->kref);
++ spin_lock_init(&psdev->lock);
++
++ return psdev;
++}
++
++/* Don't call this directly as it's called by pcistub_device_put */
++static void pcistub_device_release(struct kref *kref)
++{
++ struct pcistub_device *psdev;
++
++ psdev = container_of(kref, struct pcistub_device, kref);
++
++ dev_dbg(&psdev->dev->dev, "pcistub_device_release\n");
++
++ /* Clean-up the device */
++ pciback_reset_device(psdev->dev);
++ pciback_config_free_dyn_fields(psdev->dev);
++ pciback_config_free_dev(psdev->dev);
++ kfree(pci_get_drvdata(psdev->dev));
++ pci_set_drvdata(psdev->dev, NULL);
++
++ pci_dev_put(psdev->dev);
++
++ kfree(psdev);
++}
++
++static inline void pcistub_device_get(struct pcistub_device *psdev)
++{
++ kref_get(&psdev->kref);
++}
++
++static inline void pcistub_device_put(struct pcistub_device *psdev)
++{
++ kref_put(&psdev->kref, pcistub_device_release);
++}
++
++static struct pcistub_device *pcistub_device_find(int domain, int bus,
++ int slot, int func)
++{
++ struct pcistub_device *psdev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ list_for_each_entry(psdev, &pcistub_devices, dev_list) {
++ if (psdev->dev != NULL
++ && domain == pci_domain_nr(psdev->dev->bus)
++ && bus == psdev->dev->bus->number
++ && PCI_DEVFN(slot, func) == psdev->dev->devfn) {
++ pcistub_device_get(psdev);
++ goto out;
++ }
++ }
++
++ /* didn't find it */
++ psdev = NULL;
++
++ out:
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++ return psdev;
++}
++
++static struct pci_dev *pcistub_device_get_pci_dev(struct pciback_device *pdev,
++ struct pcistub_device *psdev)
++{
++ struct pci_dev *pci_dev = NULL;
++ unsigned long flags;
++
++ pcistub_device_get(psdev);
++
++ spin_lock_irqsave(&psdev->lock, flags);
++ if (!psdev->pdev) {
++ psdev->pdev = pdev;
++ pci_dev = psdev->dev;
++ }
++ spin_unlock_irqrestore(&psdev->lock, flags);
++
++ if (!pci_dev)
++ pcistub_device_put(psdev);
++
++ return pci_dev;
++}
++
++struct pci_dev *pcistub_get_pci_dev_by_slot(struct pciback_device *pdev,
++ int domain, int bus,
++ int slot, int func)
++{
++ struct pcistub_device *psdev;
++ struct pci_dev *found_dev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ list_for_each_entry(psdev, &pcistub_devices, dev_list) {
++ if (psdev->dev != NULL
++ && domain == pci_domain_nr(psdev->dev->bus)
++ && bus == psdev->dev->bus->number
++ && PCI_DEVFN(slot, func) == psdev->dev->devfn) {
++ found_dev = pcistub_device_get_pci_dev(pdev, psdev);
++ break;
++ }
++ }
++
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++ return found_dev;
++}
++
++struct pci_dev *pcistub_get_pci_dev(struct pciback_device *pdev,
++ struct pci_dev *dev)
++{
++ struct pcistub_device *psdev;
++ struct pci_dev *found_dev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ list_for_each_entry(psdev, &pcistub_devices, dev_list) {
++ if (psdev->dev == dev) {
++ found_dev = pcistub_device_get_pci_dev(pdev, psdev);
++ break;
++ }
++ }
++
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++ return found_dev;
++}
++
++void pcistub_put_pci_dev(struct pci_dev *dev)
++{
++ struct pcistub_device *psdev, *found_psdev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ list_for_each_entry(psdev, &pcistub_devices, dev_list) {
++ if (psdev->dev == dev) {
++ found_psdev = psdev;
++ break;
++ }
++ }
++
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++
++ /* Cleanup our device
++ * (so it's ready for the next domain)
++ */
++ pciback_reset_device(found_psdev->dev);
++ pciback_config_free_dyn_fields(found_psdev->dev);
++ pciback_config_reset_dev(found_psdev->dev);
++
++ spin_lock_irqsave(&found_psdev->lock, flags);
++ found_psdev->pdev = NULL;
++ spin_unlock_irqrestore(&found_psdev->lock, flags);
++
++ pcistub_device_put(found_psdev);
++}
++
++static int __devinit pcistub_match_one(struct pci_dev *dev,
++ struct pcistub_device_id *pdev_id)
++{
++ /* Match the specified device by domain, bus, slot, func and also if
++ * any of the device's parent bridges match.
++ */
++ for (; dev != NULL; dev = dev->bus->self) {
++ if (pci_domain_nr(dev->bus) == pdev_id->domain
++ && dev->bus->number == pdev_id->bus
++ && dev->devfn == pdev_id->devfn)
++ return 1;
++
++ /* Sometimes topmost bridge links to itself. */
++ if (dev == dev->bus->self)
++ break;
++ }
++
++ return 0;
++}
++
++static int __devinit pcistub_match(struct pci_dev *dev)
++{
++ struct pcistub_device_id *pdev_id;
++ unsigned long flags;
++ int found = 0;
++
++ spin_lock_irqsave(&device_ids_lock, flags);
++ list_for_each_entry(pdev_id, &pcistub_device_ids, slot_list) {
++ if (pcistub_match_one(dev, pdev_id)) {
++ found = 1;
++ break;
++ }
++ }
++ spin_unlock_irqrestore(&device_ids_lock, flags);
++
++ return found;
++}
++
++static int __devinit pcistub_init_device(struct pci_dev *dev)
++{
++ struct pciback_dev_data *dev_data;
++ int err = 0;
++
++ dev_dbg(&dev->dev, "initializing...\n");
++
++ /* The PCI backend is not intended to be a module (or to work with
++ * removable PCI devices (yet). If it were, pciback_config_free()
++ * would need to be called somewhere to free the memory allocated
++ * here and then to call kfree(pci_get_drvdata(psdev->dev)).
++ */
++ dev_data = kzalloc(sizeof(*dev_data), GFP_ATOMIC);
++ if (!dev_data) {
++ err = -ENOMEM;
++ goto out;
++ }
++ pci_set_drvdata(dev, dev_data);
++
++ dev_dbg(&dev->dev, "initializing config\n");
++ err = pciback_config_init_dev(dev);
++ if (err)
++ goto out;
++
++ /* HACK: Force device (& ACPI) to determine what IRQ it's on - we
++ * must do this here because pcibios_enable_device may specify
++ * the pci device's true irq (and possibly its other resources)
++ * if they differ from what's in the configuration space.
++ * This makes the assumption that the device's resources won't
++ * change after this point (otherwise this code may break!)
++ */
++ dev_dbg(&dev->dev, "enabling device\n");
++ err = pci_enable_device(dev);
++ if (err)
++ goto config_release;
++
++ /* Now disable the device (this also ensures some private device
++ * data is setup before we export)
++ */
++ dev_dbg(&dev->dev, "reset device\n");
++ pciback_reset_device(dev);
++
++ return 0;
++
++ config_release:
++ pciback_config_free_dev(dev);
++
++ out:
++ pci_set_drvdata(dev, NULL);
++ kfree(dev_data);
++ return err;
++}
++
++/*
++ * Because some initialization still happens on
++ * devices during fs_initcall, we need to defer
++ * full initialization of our devices until
++ * device_initcall.
++ */
++static int __init pcistub_init_devices_late(void)
++{
++ struct pcistub_device *psdev;
++ unsigned long flags;
++ int err = 0;
++
++ pr_debug("pciback: pcistub_init_devices_late\n");
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ while (!list_empty(&seized_devices)) {
++ psdev = container_of(seized_devices.next,
++ struct pcistub_device, dev_list);
++ list_del(&psdev->dev_list);
++
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++
++ err = pcistub_init_device(psdev->dev);
++ if (err) {
++ dev_err(&psdev->dev->dev,
++ "error %d initializing device\n", err);
++ kfree(psdev);
++ psdev = NULL;
++ }
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ if (psdev)
++ list_add_tail(&psdev->dev_list, &pcistub_devices);
++ }
++
++ initialize_devices = 1;
++
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++
++ return 0;
++}
++
++static int __devinit pcistub_seize(struct pci_dev *dev)
++{
++ struct pcistub_device *psdev;
++ unsigned long flags;
++ int err = 0;
++
++ psdev = pcistub_device_alloc(dev);
++ if (!psdev)
++ return -ENOMEM;
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ if (initialize_devices) {
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++
++ /* don't want irqs disabled when calling pcistub_init_device */
++ err = pcistub_init_device(psdev->dev);
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ if (!err)
++ list_add(&psdev->dev_list, &pcistub_devices);
++ } else {
++ dev_dbg(&dev->dev, "deferring initialization\n");
++ list_add(&psdev->dev_list, &seized_devices);
++ }
++
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++
++ if (err)
++ pcistub_device_put(psdev);
++
++ return err;
++}
++
++static int __devinit pcistub_probe(struct pci_dev *dev,
++ const struct pci_device_id *id)
++{
++ int err = 0;
++
++ dev_dbg(&dev->dev, "probing...\n");
++
++ if (pcistub_match(dev)) {
++
++ if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL
++ && dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) {
++ dev_err(&dev->dev, "can't export pci devices that "
++ "don't have a normal (0) or bridge (1) "
++ "header type!\n");
++ err = -ENODEV;
++ goto out;
++ }
++
++ dev_info(&dev->dev, "seizing device\n");
++ err = pcistub_seize(dev);
++ } else
++ /* Didn't find the device */
++ err = -ENODEV;
++
++ out:
++ return err;
++}
++
++static void pcistub_remove(struct pci_dev *dev)
++{
++ struct pcistub_device *psdev, *found_psdev = NULL;
++ unsigned long flags;
++
++ dev_dbg(&dev->dev, "removing\n");
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++
++ pciback_config_quirk_release(dev);
++
++ list_for_each_entry(psdev, &pcistub_devices, dev_list) {
++ if (psdev->dev == dev) {
++ found_psdev = psdev;
++ break;
++ }
++ }
++
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++
++ if (found_psdev) {
++ dev_dbg(&dev->dev, "found device to remove - in use? %p\n",
++ found_psdev->pdev);
++
++ if (found_psdev->pdev) {
++ printk(KERN_WARNING "pciback: ****** removing device "
++ "%s while still in-use! ******\n",
++ pci_name(found_psdev->dev));
++ printk(KERN_WARNING "pciback: ****** driver domain may "
++ "still access this device's i/o resources!\n");
++ printk(KERN_WARNING "pciback: ****** shutdown driver "
++ "domain before binding device\n");
++ printk(KERN_WARNING "pciback: ****** to other drivers "
++ "or domains\n");
++
++ pciback_release_pci_dev(found_psdev->pdev,
++ found_psdev->dev);
++ }
++
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++ list_del(&found_psdev->dev_list);
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++
++ /* the final put for releasing from the list */
++ pcistub_device_put(found_psdev);
++ }
++}
++
++static const struct pci_device_id pcistub_ids[] = {
++ {
++ .vendor = PCI_ANY_ID,
++ .device = PCI_ANY_ID,
++ .subvendor = PCI_ANY_ID,
++ .subdevice = PCI_ANY_ID,
++ },
++ {0,},
++};
++
++/*
++ * Note: There is no MODULE_DEVICE_TABLE entry here because this isn't
++ * for a normal device. I don't want it to be loaded automatically.
++ */
++
++static struct pci_driver pciback_pci_driver = {
++ .name = "pciback",
++ .id_table = pcistub_ids,
++ .probe = pcistub_probe,
++ .remove = pcistub_remove,
++};
++
++static inline int str_to_slot(const char *buf, int *domain, int *bus,
++ int *slot, int *func)
++{
++ int err;
++
++ err = sscanf(buf, " %x:%x:%x.%x", domain, bus, slot, func);
++ if (err == 4)
++ return 0;
++ else if (err < 0)
++ return -EINVAL;
++
++ /* try again without domain */
++ *domain = 0;
++ err = sscanf(buf, " %x:%x.%x", bus, slot, func);
++ if (err == 3)
++ return 0;
++
++ return -EINVAL;
++}
++
++static inline int str_to_quirk(const char *buf, int *domain, int *bus, int
++ *slot, int *func, int *reg, int *size, int *mask)
++{
++ int err;
++
++ err =
++ sscanf(buf, " %04x:%02x:%02x.%1x-%08x:%1x:%08x", domain, bus, slot,
++ func, reg, size, mask);
++ if (err == 7)
++ return 0;
++ return -EINVAL;
++}
++
++static int pcistub_device_id_add(int domain, int bus, int slot, int func)
++{
++ struct pcistub_device_id *pci_dev_id;
++ unsigned long flags;
++
++ pci_dev_id = kmalloc(sizeof(*pci_dev_id), GFP_KERNEL);
++ if (!pci_dev_id)
++ return -ENOMEM;
++
++ pci_dev_id->domain = domain;
++ pci_dev_id->bus = bus;
++ pci_dev_id->devfn = PCI_DEVFN(slot, func);
++
++ pr_debug("pciback: wants to seize %04x:%02x:%02x.%01x\n",
++ domain, bus, slot, func);
++
++ spin_lock_irqsave(&device_ids_lock, flags);
++ list_add_tail(&pci_dev_id->slot_list, &pcistub_device_ids);
++ spin_unlock_irqrestore(&device_ids_lock, flags);
++
++ return 0;
++}
++
++static int pcistub_device_id_remove(int domain, int bus, int slot, int func)
++{
++ struct pcistub_device_id *pci_dev_id, *t;
++ int devfn = PCI_DEVFN(slot, func);
++ int err = -ENOENT;
++ unsigned long flags;
++
++ spin_lock_irqsave(&device_ids_lock, flags);
++ list_for_each_entry_safe(pci_dev_id, t, &pcistub_device_ids, slot_list) {
++
++ if (pci_dev_id->domain == domain
++ && pci_dev_id->bus == bus && pci_dev_id->devfn == devfn) {
++ /* Don't break; here because it's possible the same
++ * slot could be in the list more than once
++ */
++ list_del(&pci_dev_id->slot_list);
++ kfree(pci_dev_id);
++
++ err = 0;
++
++ pr_debug("pciback: removed %04x:%02x:%02x.%01x from "
++ "seize list\n", domain, bus, slot, func);
++ }
++ }
++ spin_unlock_irqrestore(&device_ids_lock, flags);
++
++ return err;
++}
++
++static int pcistub_reg_add(int domain, int bus, int slot, int func, int reg,
++ int size, int mask)
++{
++ int err = 0;
++ struct pcistub_device *psdev;
++ struct pci_dev *dev;
++ struct config_field *field;
++
++ psdev = pcistub_device_find(domain, bus, slot, func);
++ if (!psdev || !psdev->dev) {
++ err = -ENODEV;
++ goto out;
++ }
++ dev = psdev->dev;
++
++ field = kzalloc(sizeof(*field), GFP_ATOMIC);
++ if (!field) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ field->offset = reg;
++ field->size = size;
++ field->mask = mask;
++ field->init = NULL;
++ field->reset = NULL;
++ field->release = NULL;
++ field->clean = pciback_config_field_free;
++
++ err = pciback_config_quirks_add_field(dev, field);
++ if (err)
++ kfree(field);
++ out:
++ return err;
++}
++
++static ssize_t pcistub_slot_add(struct device_driver *drv, const char *buf,
++ size_t count)
++{
++ int domain, bus, slot, func;
++ int err;
++
++ err = str_to_slot(buf, &domain, &bus, &slot, &func);
++ if (err)
++ goto out;
++
++ err = pcistub_device_id_add(domain, bus, slot, func);
++
++ out:
++ if (!err)
++ err = count;
++ return err;
++}
++
++DRIVER_ATTR(new_slot, S_IWUSR, NULL, pcistub_slot_add);
++
++static ssize_t pcistub_slot_remove(struct device_driver *drv, const char *buf,
++ size_t count)
++{
++ int domain, bus, slot, func;
++ int err;
++
++ err = str_to_slot(buf, &domain, &bus, &slot, &func);
++ if (err)
++ goto out;
++
++ err = pcistub_device_id_remove(domain, bus, slot, func);
++
++ out:
++ if (!err)
++ err = count;
++ return err;
++}
++
++DRIVER_ATTR(remove_slot, S_IWUSR, NULL, pcistub_slot_remove);
++
++static ssize_t pcistub_slot_show(struct device_driver *drv, char *buf)
++{
++ struct pcistub_device_id *pci_dev_id;
++ size_t count = 0;
++ unsigned long flags;
++
++ spin_lock_irqsave(&device_ids_lock, flags);
++ list_for_each_entry(pci_dev_id, &pcistub_device_ids, slot_list) {
++ if (count >= PAGE_SIZE)
++ break;
++
++ count += scnprintf(buf + count, PAGE_SIZE - count,
++ "%04x:%02x:%02x.%01x\n",
++ pci_dev_id->domain, pci_dev_id->bus,
++ PCI_SLOT(pci_dev_id->devfn),
++ PCI_FUNC(pci_dev_id->devfn));
++ }
++ spin_unlock_irqrestore(&device_ids_lock, flags);
++
++ return count;
++}
++
++DRIVER_ATTR(slots, S_IRUSR, pcistub_slot_show, NULL);
++
++static ssize_t pcistub_quirk_add(struct device_driver *drv, const char *buf,
++ size_t count)
++{
++ int domain, bus, slot, func, reg, size, mask;
++ int err;
++
++ err = str_to_quirk(buf, &domain, &bus, &slot, &func, ®, &size,
++ &mask);
++ if (err)
++ goto out;
++
++ err = pcistub_reg_add(domain, bus, slot, func, reg, size, mask);
++
++ out:
++ if (!err)
++ err = count;
++ return err;
++}
++
++static ssize_t pcistub_quirk_show(struct device_driver *drv, char *buf)
++{
++ int count = 0;
++ unsigned long flags;
++ extern struct list_head pciback_quirks;
++ struct pciback_config_quirk *quirk;
++ struct pciback_dev_data *dev_data;
++ const struct config_field *field;
++ const struct config_field_entry *cfg_entry;
++
++ spin_lock_irqsave(&device_ids_lock, flags);
++ list_for_each_entry(quirk, &pciback_quirks, quirks_list) {
++ if (count >= PAGE_SIZE)
++ goto out;
++
++ count += scnprintf(buf + count, PAGE_SIZE - count,
++ "%02x:%02x.%01x\n\t%04x:%04x:%04x:%04x\n",
++ quirk->pdev->bus->number,
++ PCI_SLOT(quirk->pdev->devfn),
++ PCI_FUNC(quirk->pdev->devfn),
++ quirk->devid.vendor, quirk->devid.device,
++ quirk->devid.subvendor,
++ quirk->devid.subdevice);
++
++ dev_data = pci_get_drvdata(quirk->pdev);
++
++ list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
++ field = cfg_entry->field;
++ if (count >= PAGE_SIZE)
++ goto out;
++
++ count += scnprintf(buf + count, PAGE_SIZE - count,
++ "\t\t%08x:%01x:%08x\n",
++ cfg_entry->base_offset + field->offset,
++ field->size, field->mask);
++ }
++ }
++
++ out:
++ spin_unlock_irqrestore(&device_ids_lock, flags);
++
++ return count;
++}
++
++DRIVER_ATTR(quirks, S_IRUSR | S_IWUSR, pcistub_quirk_show, pcistub_quirk_add);
++
++static ssize_t permissive_add(struct device_driver *drv, const char *buf,
++ size_t count)
++{
++ int domain, bus, slot, func;
++ int err;
++ struct pcistub_device *psdev;
++ struct pciback_dev_data *dev_data;
++ err = str_to_slot(buf, &domain, &bus, &slot, &func);
++ if (err)
++ goto out;
++ psdev = pcistub_device_find(domain, bus, slot, func);
++ if (!psdev) {
++ err = -ENODEV;
++ goto out;
++ }
++ if (!psdev->dev) {
++ err = -ENODEV;
++ goto release;
++ }
++ dev_data = pci_get_drvdata(psdev->dev);
++ /* the driver data for a device should never be null at this point */
++ if (!dev_data) {
++ err = -ENXIO;
++ goto release;
++ }
++ if (!dev_data->permissive) {
++ dev_data->permissive = 1;
++ /* Let user know that what they're doing could be unsafe */
++ dev_warn(&psdev->dev->dev,
++ "enabling permissive mode configuration space accesses!\n");
++ dev_warn(&psdev->dev->dev,
++ "permissive mode is potentially unsafe!\n");
++ }
++ release:
++ pcistub_device_put(psdev);
++ out:
++ if (!err)
++ err = count;
++ return err;
++}
++
++static ssize_t permissive_show(struct device_driver *drv, char *buf)
++{
++ struct pcistub_device *psdev;
++ struct pciback_dev_data *dev_data;
++ size_t count = 0;
++ unsigned long flags;
++ spin_lock_irqsave(&pcistub_devices_lock, flags);
++ list_for_each_entry(psdev, &pcistub_devices, dev_list) {
++ if (count >= PAGE_SIZE)
++ break;
++ if (!psdev->dev)
++ continue;
++ dev_data = pci_get_drvdata(psdev->dev);
++ if (!dev_data || !dev_data->permissive)
++ continue;
++ count +=
++ scnprintf(buf + count, PAGE_SIZE - count, "%s\n",
++ pci_name(psdev->dev));
++ }
++ spin_unlock_irqrestore(&pcistub_devices_lock, flags);
++ return count;
++}
++
++DRIVER_ATTR(permissive, S_IRUSR | S_IWUSR, permissive_show, permissive_add);
++
++#ifdef CONFIG_PCI_MSI
++
++int pciback_get_owner(struct pci_dev *dev)
++{
++ struct pcistub_device *psdev;
++
++ psdev = pcistub_device_find(pci_domain_nr(dev->bus), dev->bus->number,
++ PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
++
++ if (!psdev || !psdev->pdev)
++ return -1;
++
++ return psdev->pdev->xdev->otherend_id;
++}
++#endif
++
++static void pcistub_exit(void)
++{
++ driver_remove_file(&pciback_pci_driver.driver, &driver_attr_new_slot);
++ driver_remove_file(&pciback_pci_driver.driver,
++ &driver_attr_remove_slot);
++ driver_remove_file(&pciback_pci_driver.driver, &driver_attr_slots);
++ driver_remove_file(&pciback_pci_driver.driver, &driver_attr_quirks);
++ driver_remove_file(&pciback_pci_driver.driver, &driver_attr_permissive);
++
++ pci_unregister_driver(&pciback_pci_driver);
++ WARN_ON(unregister_msi_get_owner(pciback_get_owner));
++}
++
++static int __init pcistub_init(void)
++{
++ int pos = 0;
++ int err = 0;
++ int domain, bus, slot, func;
++ int parsed;
++
++ if (pci_devs_to_hide && *pci_devs_to_hide) {
++ do {
++ parsed = 0;
++
++ err = sscanf(pci_devs_to_hide + pos,
++ " (%x:%x:%x.%x) %n",
++ &domain, &bus, &slot, &func, &parsed);
++ if (err != 4) {
++ domain = 0;
++ err = sscanf(pci_devs_to_hide + pos,
++ " (%x:%x.%x) %n",
++ &bus, &slot, &func, &parsed);
++ if (err != 3)
++ goto parse_error;
++ }
++
++ err = pcistub_device_id_add(domain, bus, slot, func);
++ if (err)
++ goto out;
++
++ /* if parsed<=0, we've reached the end of the string */
++ pos += parsed;
++ } while (parsed > 0 && pci_devs_to_hide[pos]);
++ }
++
++ /* If we're the first PCI Device Driver to register, we're the
++ * first one to get offered PCI devices as they become
++ * available (and thus we can be the first to grab them)
++ */
++ err = pci_register_driver(&pciback_pci_driver);
++ if (err < 0)
++ goto out;
++
++ err = driver_create_file(&pciback_pci_driver.driver,
++ &driver_attr_new_slot);
++ if (!err)
++ err = driver_create_file(&pciback_pci_driver.driver,
++ &driver_attr_remove_slot);
++ if (!err)
++ err = driver_create_file(&pciback_pci_driver.driver,
++ &driver_attr_slots);
++ if (!err)
++ err = driver_create_file(&pciback_pci_driver.driver,
++ &driver_attr_quirks);
++ if (!err)
++ err = driver_create_file(&pciback_pci_driver.driver,
++ &driver_attr_permissive);
++
++ if (!err)
++ err = register_msi_get_owner(pciback_get_owner);
++ if (err)
++ pcistub_exit();
++
++ out:
++ return err;
++
++ parse_error:
++ printk(KERN_ERR "pciback: Error parsing pci_devs_to_hide at \"%s\"\n",
++ pci_devs_to_hide + pos);
++ return -EINVAL;
++}
++
++#ifndef MODULE
++/*
++ * fs_initcall happens before device_initcall
++ * so pciback *should* get called first (b/c we
++ * want to suck up any device before other drivers
++ * get a chance by being the first pci device
++ * driver to register)
++ */
++fs_initcall(pcistub_init);
++#endif
++
++static int __init pciback_init(void)
++{
++ int err;
++
++ err = pciback_config_init();
++ if (err)
++ return err;
++
++#ifdef MODULE
++ err = pcistub_init();
++ if (err < 0)
++ return err;
++#endif
++
++ pcistub_init_devices_late();
++ err = pciback_xenbus_register();
++ if (err)
++ pcistub_exit();
++
++ return err;
++}
++
++static void __exit pciback_cleanup(void)
++{
++ pciback_xenbus_unregister();
++ pcistub_exit();
++}
++
++module_init(pciback_init);
++module_exit(pciback_cleanup);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/pciback/pciback.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/pciback.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,111 @@
++/*
++ * PCI Backend Common Data Structures & Function Declarations
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#ifndef __XEN_PCIBACK_H__
++#define __XEN_PCIBACK_H__
++
++#include <linux/pci.h>
++#include <linux/interrupt.h>
++#include <xen/xenbus.h>
++#include <linux/list.h>
++#include <linux/spinlock.h>
++#include <linux/workqueue.h>
++#include <asm/atomic.h>
++#include <xen/interface/io/pciif.h>
++
++struct pci_dev_entry {
++ struct list_head list;
++ struct pci_dev *dev;
++};
++
++#define _PDEVF_op_active (0)
++#define PDEVF_op_active (1<<(_PDEVF_op_active))
++
++struct pciback_device {
++ void *pci_dev_data;
++ spinlock_t dev_lock;
++
++ struct xenbus_device *xdev;
++
++ struct xenbus_watch be_watch;
++ u8 be_watching;
++
++ int evtchn_irq;
++
++ struct vm_struct *sh_area;
++ struct xen_pci_sharedinfo *sh_info;
++
++ unsigned long flags;
++
++ struct work_struct op_work;
++};
++
++struct pciback_dev_data {
++ struct list_head config_fields;
++ int permissive;
++ int warned_on_write;
++};
++
++/* Get/Put PCI Devices that are hidden from the PCI Backend Domain */
++struct pci_dev *pcistub_get_pci_dev_by_slot(struct pciback_device *pdev,
++ int domain, int bus,
++ int slot, int func);
++struct pci_dev *pcistub_get_pci_dev(struct pciback_device *pdev,
++ struct pci_dev *dev);
++void pcistub_put_pci_dev(struct pci_dev *dev);
++
++/* Ensure a device is turned off or reset */
++void pciback_reset_device(struct pci_dev *pdev);
++
++/* Access a virtual configuration space for a PCI device */
++int pciback_config_init(void);
++int pciback_config_init_dev(struct pci_dev *dev);
++void pciback_config_free_dyn_fields(struct pci_dev *dev);
++void pciback_config_reset_dev(struct pci_dev *dev);
++void pciback_config_free_dev(struct pci_dev *dev);
++int pciback_config_read(struct pci_dev *dev, int offset, int size,
++ u32 * ret_val);
++int pciback_config_write(struct pci_dev *dev, int offset, int size, u32 value);
++
++/* Handle requests for specific devices from the frontend */
++typedef int (*publish_pci_dev_cb) (struct pciback_device *pdev,
++ unsigned int domain, unsigned int bus,
++ unsigned int devfn, unsigned int devid);
++typedef int (*publish_pci_root_cb) (struct pciback_device * pdev,
++ unsigned int domain, unsigned int bus);
++int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
++ int devid, publish_pci_dev_cb publish_cb);
++void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev);
++struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
++ unsigned int domain, unsigned int bus,
++ unsigned int devfn);
++int pciback_init_devices(struct pciback_device *pdev);
++int pciback_publish_pci_roots(struct pciback_device *pdev,
++ publish_pci_root_cb cb);
++void pciback_release_devices(struct pciback_device *pdev);
++
++/* Handles events from front-end */
++irqreturn_t pciback_handle_event(int irq, void *dev_id, struct pt_regs *regs);
++void pciback_do_op(void *data);
++
++int pciback_xenbus_register(void);
++void pciback_xenbus_unregister(void);
++
++#ifdef CONFIG_PCI_MSI
++int pciback_enable_msi(struct pciback_device *pdev,
++ struct pci_dev *dev, struct xen_pci_op *op);
++
++int pciback_disable_msi(struct pciback_device *pdev,
++ struct pci_dev *dev, struct xen_pci_op *op);
++
++
++int pciback_enable_msix(struct pciback_device *pdev,
++ struct pci_dev *dev, struct xen_pci_op *op);
++
++int pciback_disable_msix(struct pciback_device *pdev,
++ struct pci_dev *dev, struct xen_pci_op *op);
++#endif
++extern int verbose_request;
++#endif
+Index: head-2008-11-25/drivers/xen/pciback/pciback_ops.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/pciback_ops.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,117 @@
++/*
++ * PCI Backend Operations - respond to PCI requests from Frontend
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#include <linux/module.h>
++#include <asm/bitops.h>
++#include <xen/evtchn.h>
++#include "pciback.h"
++
++int verbose_request = 0;
++module_param(verbose_request, int, 0644);
++
++/* Ensure a device is "turned off" and ready to be exported.
++ * (Also see pciback_config_reset to ensure virtual configuration space is
++ * ready to be re-exported)
++ */
++void pciback_reset_device(struct pci_dev *dev)
++{
++ u16 cmd;
++
++ /* Disable devices (but not bridges) */
++ if (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) {
++ pci_disable_device(dev);
++
++ pci_write_config_word(dev, PCI_COMMAND, 0);
++
++ dev->is_enabled = 0;
++ dev->is_busmaster = 0;
++ } else {
++ pci_read_config_word(dev, PCI_COMMAND, &cmd);
++ if (cmd & (PCI_COMMAND_INVALIDATE)) {
++ cmd &= ~(PCI_COMMAND_INVALIDATE);
++ pci_write_config_word(dev, PCI_COMMAND, cmd);
++
++ dev->is_busmaster = 0;
++ }
++ }
++}
++
++static inline void test_and_schedule_op(struct pciback_device *pdev)
++{
++ /* Check that frontend is requesting an operation and that we are not
++ * already processing a request */
++ if (test_bit(_XEN_PCIF_active, (unsigned long *)&pdev->sh_info->flags)
++ && !test_and_set_bit(_PDEVF_op_active, &pdev->flags))
++ schedule_work(&pdev->op_work);
++}
++
++/* Performing the configuration space reads/writes must not be done in atomic
++ * context because some of the pci_* functions can sleep (mostly due to ACPI
++ * use of semaphores). This function is intended to be called from a work
++ * queue in process context taking a struct pciback_device as a parameter */
++void pciback_do_op(void *data)
++{
++ struct pciback_device *pdev = data;
++ struct pci_dev *dev;
++ struct xen_pci_op *op = &pdev->sh_info->op;
++
++ dev = pciback_get_pci_dev(pdev, op->domain, op->bus, op->devfn);
++
++ if (dev == NULL)
++ op->err = XEN_PCI_ERR_dev_not_found;
++ else
++ {
++ switch (op->cmd)
++ {
++ case XEN_PCI_OP_conf_read:
++ op->err = pciback_config_read(dev,
++ op->offset, op->size, &op->value);
++ break;
++ case XEN_PCI_OP_conf_write:
++ op->err = pciback_config_write(dev,
++ op->offset, op->size, op->value);
++ break;
++#ifdef CONFIG_PCI_MSI
++ case XEN_PCI_OP_enable_msi:
++ op->err = pciback_enable_msi(pdev, dev, op);
++ break;
++ case XEN_PCI_OP_disable_msi:
++ op->err = pciback_disable_msi(pdev, dev, op);
++ break;
++ case XEN_PCI_OP_enable_msix:
++ op->err = pciback_enable_msix(pdev, dev, op);
++ break;
++ case XEN_PCI_OP_disable_msix:
++ op->err = pciback_disable_msix(pdev, dev, op);
++ break;
++#endif
++ default:
++ op->err = XEN_PCI_ERR_not_implemented;
++ break;
++ }
++ }
++ /* Tell the driver domain that we're done. */
++ wmb();
++ clear_bit(_XEN_PCIF_active, (unsigned long *)&pdev->sh_info->flags);
++ notify_remote_via_irq(pdev->evtchn_irq);
++
++ /* Mark that we're done. */
++ smp_mb__before_clear_bit(); /* /after/ clearing PCIF_active */
++ clear_bit(_PDEVF_op_active, &pdev->flags);
++ smp_mb__after_clear_bit(); /* /before/ final check for work */
++
++ /* Check to see if the driver domain tried to start another request in
++ * between clearing _XEN_PCIF_active and clearing _PDEVF_op_active. */
++ test_and_schedule_op(pdev);
++}
++
++irqreturn_t pciback_handle_event(int irq, void *dev_id, struct pt_regs *regs)
++{
++ struct pciback_device *pdev = dev_id;
++
++ test_and_schedule_op(pdev);
++
++ return IRQ_HANDLED;
++}
+Index: head-2008-11-25/drivers/xen/pciback/slot.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/slot.c 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,157 @@
++/*
++ * PCI Backend - Provides a Virtual PCI bus (with real devices)
++ * to the frontend
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil> (vpci.c)
++ * Author: Tristan Gingold <tristan.gingold@bull.net>, from vpci.c
++ */
++
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/pci.h>
++#include <linux/spinlock.h>
++#include "pciback.h"
++
++/* There are at most 32 slots in a pci bus. */
++#define PCI_SLOT_MAX 32
++
++#define PCI_BUS_NBR 2
++
++struct slot_dev_data {
++ /* Access to dev_list must be protected by lock */
++ struct pci_dev *slots[PCI_BUS_NBR][PCI_SLOT_MAX];
++ spinlock_t lock;
++};
++
++struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
++ unsigned int domain, unsigned int bus,
++ unsigned int devfn)
++{
++ struct pci_dev *dev = NULL;
++ struct slot_dev_data *slot_dev = pdev->pci_dev_data;
++ unsigned long flags;
++
++ if (domain != 0 || PCI_FUNC(devfn) != 0)
++ return NULL;
++
++ if (PCI_SLOT(devfn) >= PCI_SLOT_MAX || bus >= PCI_BUS_NBR)
++ return NULL;
++
++ spin_lock_irqsave(&slot_dev->lock, flags);
++ dev = slot_dev->slots[bus][PCI_SLOT(devfn)];
++ spin_unlock_irqrestore(&slot_dev->lock, flags);
++
++ return dev;
++}
++
++int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
++ int devid, publish_pci_dev_cb publish_cb)
++{
++ int err = 0, slot, bus;
++ struct slot_dev_data *slot_dev = pdev->pci_dev_data;
++ unsigned long flags;
++
++ if ((dev->class >> 24) == PCI_BASE_CLASS_BRIDGE) {
++ err = -EFAULT;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Can't export bridges on the virtual PCI bus");
++ goto out;
++ }
++
++ spin_lock_irqsave(&slot_dev->lock, flags);
++
++ /* Assign to a new slot on the virtual PCI bus */
++ for (bus = 0; bus < PCI_BUS_NBR; bus++)
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
++ if (slot_dev->slots[bus][slot] == NULL) {
++ printk(KERN_INFO
++ "pciback: slot: %s: assign to virtual slot %d, bus %d\n",
++ pci_name(dev), slot, bus);
++ slot_dev->slots[bus][slot] = dev;
++ goto unlock;
++ }
++ }
++
++ err = -ENOMEM;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "No more space on root virtual PCI bus");
++
++ unlock:
++ spin_unlock_irqrestore(&slot_dev->lock, flags);
++
++ /* Publish this device. */
++ if(!err)
++ err = publish_cb(pdev, 0, 0, PCI_DEVFN(slot, 0), devid);
++
++ out:
++ return err;
++}
++
++void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev)
++{
++ int slot, bus;
++ struct slot_dev_data *slot_dev = pdev->pci_dev_data;
++ struct pci_dev *found_dev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&slot_dev->lock, flags);
++
++ for (bus = 0; bus < PCI_BUS_NBR; bus++)
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
++ if (slot_dev->slots[bus][slot] == dev) {
++ slot_dev->slots[bus][slot] = NULL;
++ found_dev = dev;
++ goto out;
++ }
++ }
++
++ out:
++ spin_unlock_irqrestore(&slot_dev->lock, flags);
++
++ if (found_dev)
++ pcistub_put_pci_dev(found_dev);
++}
++
++int pciback_init_devices(struct pciback_device *pdev)
++{
++ int slot, bus;
++ struct slot_dev_data *slot_dev;
++
++ slot_dev = kmalloc(sizeof(*slot_dev), GFP_KERNEL);
++ if (!slot_dev)
++ return -ENOMEM;
++
++ spin_lock_init(&slot_dev->lock);
++
++ for (bus = 0; bus < PCI_BUS_NBR; bus++)
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++)
++ slot_dev->slots[bus][slot] = NULL;
++
++ pdev->pci_dev_data = slot_dev;
++
++ return 0;
++}
++
++int pciback_publish_pci_roots(struct pciback_device *pdev,
++ publish_pci_root_cb publish_cb)
++{
++ /* The Virtual PCI bus has only one root */
++ return publish_cb(pdev, 0, 0);
++}
++
++void pciback_release_devices(struct pciback_device *pdev)
++{
++ int slot, bus;
++ struct slot_dev_data *slot_dev = pdev->pci_dev_data;
++ struct pci_dev *dev;
++
++ for (bus = 0; bus < PCI_BUS_NBR; bus++)
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
++ dev = slot_dev->slots[bus][slot];
++ if (dev != NULL)
++ pcistub_put_pci_dev(dev);
++ }
++
++ kfree(slot_dev);
++ pdev->pci_dev_data = NULL;
++}
+Index: head-2008-11-25/drivers/xen/pciback/vpci.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/vpci.c 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,212 @@
++/*
++ * PCI Backend - Provides a Virtual PCI bus (with real devices)
++ * to the frontend
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++
++#include <linux/list.h>
++#include <linux/slab.h>
++#include <linux/pci.h>
++#include <linux/spinlock.h>
++#include "pciback.h"
++
++#define PCI_SLOT_MAX 32
++
++struct vpci_dev_data {
++ /* Access to dev_list must be protected by lock */
++ struct list_head dev_list[PCI_SLOT_MAX];
++ spinlock_t lock;
++};
++
++static inline struct list_head *list_first(struct list_head *head)
++{
++ return head->next;
++}
++
++struct pci_dev *pciback_get_pci_dev(struct pciback_device *pdev,
++ unsigned int domain, unsigned int bus,
++ unsigned int devfn)
++{
++ struct pci_dev_entry *entry;
++ struct pci_dev *dev = NULL;
++ struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
++ unsigned long flags;
++
++ if (domain != 0 || bus != 0)
++ return NULL;
++
++ if (PCI_SLOT(devfn) < PCI_SLOT_MAX) {
++ spin_lock_irqsave(&vpci_dev->lock, flags);
++
++ list_for_each_entry(entry,
++ &vpci_dev->dev_list[PCI_SLOT(devfn)],
++ list) {
++ if (PCI_FUNC(entry->dev->devfn) == PCI_FUNC(devfn)) {
++ dev = entry->dev;
++ break;
++ }
++ }
++
++ spin_unlock_irqrestore(&vpci_dev->lock, flags);
++ }
++ return dev;
++}
++
++static inline int match_slot(struct pci_dev *l, struct pci_dev *r)
++{
++ if (pci_domain_nr(l->bus) == pci_domain_nr(r->bus)
++ && l->bus == r->bus && PCI_SLOT(l->devfn) == PCI_SLOT(r->devfn))
++ return 1;
++
++ return 0;
++}
++
++int pciback_add_pci_dev(struct pciback_device *pdev, struct pci_dev *dev,
++ int devid, publish_pci_dev_cb publish_cb)
++{
++ int err = 0, slot, func;
++ struct pci_dev_entry *t, *dev_entry;
++ struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
++ unsigned long flags;
++
++ if ((dev->class >> 24) == PCI_BASE_CLASS_BRIDGE) {
++ err = -EFAULT;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Can't export bridges on the virtual PCI bus");
++ goto out;
++ }
++
++ dev_entry = kmalloc(sizeof(*dev_entry), GFP_KERNEL);
++ if (!dev_entry) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error adding entry to virtual PCI bus");
++ goto out;
++ }
++
++ dev_entry->dev = dev;
++
++ spin_lock_irqsave(&vpci_dev->lock, flags);
++
++ /* Keep multi-function devices together on the virtual PCI bus */
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
++ if (!list_empty(&vpci_dev->dev_list[slot])) {
++ t = list_entry(list_first(&vpci_dev->dev_list[slot]),
++ struct pci_dev_entry, list);
++
++ if (match_slot(dev, t->dev)) {
++ pr_info("pciback: vpci: %s: "
++ "assign to virtual slot %d func %d\n",
++ pci_name(dev), slot,
++ PCI_FUNC(dev->devfn));
++ list_add_tail(&dev_entry->list,
++ &vpci_dev->dev_list[slot]);
++ func = PCI_FUNC(dev->devfn);
++ goto unlock;
++ }
++ }
++ }
++
++ /* Assign to a new slot on the virtual PCI bus */
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
++ if (list_empty(&vpci_dev->dev_list[slot])) {
++ printk(KERN_INFO
++ "pciback: vpci: %s: assign to virtual slot %d\n",
++ pci_name(dev), slot);
++ list_add_tail(&dev_entry->list,
++ &vpci_dev->dev_list[slot]);
++ func = PCI_FUNC(dev->devfn);
++ goto unlock;
++ }
++ }
++
++ err = -ENOMEM;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "No more space on root virtual PCI bus");
++
++ unlock:
++ spin_unlock_irqrestore(&vpci_dev->lock, flags);
++
++ /* Publish this device. */
++ if(!err)
++ err = publish_cb(pdev, 0, 0, PCI_DEVFN(slot, func), devid);
++
++ out:
++ return err;
++}
++
++void pciback_release_pci_dev(struct pciback_device *pdev, struct pci_dev *dev)
++{
++ int slot;
++ struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
++ struct pci_dev *found_dev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&vpci_dev->lock, flags);
++
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
++ struct pci_dev_entry *e, *tmp;
++ list_for_each_entry_safe(e, tmp, &vpci_dev->dev_list[slot],
++ list) {
++ if (e->dev == dev) {
++ list_del(&e->list);
++ found_dev = e->dev;
++ kfree(e);
++ goto out;
++ }
++ }
++ }
++
++ out:
++ spin_unlock_irqrestore(&vpci_dev->lock, flags);
++
++ if (found_dev)
++ pcistub_put_pci_dev(found_dev);
++}
++
++int pciback_init_devices(struct pciback_device *pdev)
++{
++ int slot;
++ struct vpci_dev_data *vpci_dev;
++
++ vpci_dev = kmalloc(sizeof(*vpci_dev), GFP_KERNEL);
++ if (!vpci_dev)
++ return -ENOMEM;
++
++ spin_lock_init(&vpci_dev->lock);
++
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
++ INIT_LIST_HEAD(&vpci_dev->dev_list[slot]);
++ }
++
++ pdev->pci_dev_data = vpci_dev;
++
++ return 0;
++}
++
++int pciback_publish_pci_roots(struct pciback_device *pdev,
++ publish_pci_root_cb publish_cb)
++{
++ /* The Virtual PCI bus has only one root */
++ return publish_cb(pdev, 0, 0);
++}
++
++void pciback_release_devices(struct pciback_device *pdev)
++{
++ int slot;
++ struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
++
++ for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
++ struct pci_dev_entry *e, *tmp;
++ list_for_each_entry_safe(e, tmp, &vpci_dev->dev_list[slot],
++ list) {
++ list_del(&e->list);
++ pcistub_put_pci_dev(e->dev);
++ kfree(e);
++ }
++ }
++
++ kfree(vpci_dev);
++ pdev->pci_dev_data = NULL;
++}
+Index: head-2008-11-25/drivers/xen/pciback/xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pciback/xenbus.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,704 @@
++/*
++ * PCI Backend Xenbus Setup - handles setup with frontend and xend
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/vmalloc.h>
++#include <xen/xenbus.h>
++#include <xen/evtchn.h>
++#include "pciback.h"
++
++#define INVALID_EVTCHN_IRQ (-1)
++
++static struct pciback_device *alloc_pdev(struct xenbus_device *xdev)
++{
++ struct pciback_device *pdev;
++
++ pdev = kzalloc(sizeof(struct pciback_device), GFP_KERNEL);
++ if (pdev == NULL)
++ goto out;
++ dev_dbg(&xdev->dev, "allocated pdev @ 0x%p\n", pdev);
++
++ pdev->xdev = xdev;
++ xdev->dev.driver_data = pdev;
++
++ spin_lock_init(&pdev->dev_lock);
++
++ pdev->sh_area = NULL;
++ pdev->sh_info = NULL;
++ pdev->evtchn_irq = INVALID_EVTCHN_IRQ;
++ pdev->be_watching = 0;
++
++ INIT_WORK(&pdev->op_work, pciback_do_op, pdev);
++
++ if (pciback_init_devices(pdev)) {
++ kfree(pdev);
++ pdev = NULL;
++ }
++ out:
++ return pdev;
++}
++
++static void pciback_disconnect(struct pciback_device *pdev)
++{
++ spin_lock(&pdev->dev_lock);
++
++ /* Ensure the guest can't trigger our handler before removing devices */
++ if (pdev->evtchn_irq != INVALID_EVTCHN_IRQ) {
++ unbind_from_irqhandler(pdev->evtchn_irq, pdev);
++ pdev->evtchn_irq = INVALID_EVTCHN_IRQ;
++ }
++
++ /* If the driver domain started an op, make sure we complete it or
++ * delete it before releasing the shared memory */
++ cancel_delayed_work(&pdev->op_work);
++ flush_scheduled_work();
++
++ if (pdev->sh_info != NULL) {
++ xenbus_unmap_ring_vfree(pdev->xdev, pdev->sh_area);
++ pdev->sh_info = NULL;
++ }
++
++ spin_unlock(&pdev->dev_lock);
++}
++
++static void free_pdev(struct pciback_device *pdev)
++{
++ if (pdev->be_watching)
++ unregister_xenbus_watch(&pdev->be_watch);
++
++ pciback_disconnect(pdev);
++
++ pciback_release_devices(pdev);
++
++ pdev->xdev->dev.driver_data = NULL;
++ pdev->xdev = NULL;
++
++ kfree(pdev);
++}
++
++static int pciback_do_attach(struct pciback_device *pdev, int gnt_ref,
++ int remote_evtchn)
++{
++ int err = 0;
++ struct vm_struct *area;
++
++ dev_dbg(&pdev->xdev->dev,
++ "Attaching to frontend resources - gnt_ref=%d evtchn=%d\n",
++ gnt_ref, remote_evtchn);
++
++ area = xenbus_map_ring_valloc(pdev->xdev, gnt_ref);
++ if (IS_ERR(area)) {
++ err = PTR_ERR(area);
++ goto out;
++ }
++ pdev->sh_area = area;
++ pdev->sh_info = area->addr;
++
++ err = bind_interdomain_evtchn_to_irqhandler(
++ pdev->xdev->otherend_id, remote_evtchn, pciback_handle_event,
++ SA_SAMPLE_RANDOM, "pciback", pdev);
++ if (err < 0) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error binding event channel to IRQ");
++ goto out;
++ }
++ pdev->evtchn_irq = err;
++ err = 0;
++
++ dev_dbg(&pdev->xdev->dev, "Attached!\n");
++ out:
++ return err;
++}
++
++static int pciback_attach(struct pciback_device *pdev)
++{
++ int err = 0;
++ int gnt_ref, remote_evtchn;
++ char *magic = NULL;
++
++ spin_lock(&pdev->dev_lock);
++
++ /* Make sure we only do this setup once */
++ if (xenbus_read_driver_state(pdev->xdev->nodename) !=
++ XenbusStateInitialised)
++ goto out;
++
++ /* Wait for frontend to state that it has published the configuration */
++ if (xenbus_read_driver_state(pdev->xdev->otherend) !=
++ XenbusStateInitialised)
++ goto out;
++
++ dev_dbg(&pdev->xdev->dev, "Reading frontend config\n");
++
++ err = xenbus_gather(XBT_NIL, pdev->xdev->otherend,
++ "pci-op-ref", "%u", &gnt_ref,
++ "event-channel", "%u", &remote_evtchn,
++ "magic", NULL, &magic, NULL);
++ if (err) {
++ /* If configuration didn't get read correctly, wait longer */
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading configuration from frontend");
++ goto out;
++ }
++
++ if (magic == NULL || strcmp(magic, XEN_PCI_MAGIC) != 0) {
++ xenbus_dev_fatal(pdev->xdev, -EFAULT,
++ "version mismatch (%s/%s) with pcifront - "
++ "halting pciback",
++ magic, XEN_PCI_MAGIC);
++ goto out;
++ }
++
++ err = pciback_do_attach(pdev, gnt_ref, remote_evtchn);
++ if (err)
++ goto out;
++
++ dev_dbg(&pdev->xdev->dev, "Connecting...\n");
++
++ err = xenbus_switch_state(pdev->xdev, XenbusStateConnected);
++ if (err)
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error switching to connected state!");
++
++ dev_dbg(&pdev->xdev->dev, "Connected? %d\n", err);
++ out:
++ spin_unlock(&pdev->dev_lock);
++
++ if (magic)
++ kfree(magic);
++
++ return err;
++}
++
++static int pciback_publish_pci_dev(struct pciback_device *pdev,
++ unsigned int domain, unsigned int bus,
++ unsigned int devfn, unsigned int devid)
++{
++ int err;
++ int len;
++ char str[64];
++
++ len = snprintf(str, sizeof(str), "vdev-%d", devid);
++ if (unlikely(len >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ err = xenbus_printf(XBT_NIL, pdev->xdev->nodename, str,
++ "%04x:%02x:%02x.%02x", domain, bus,
++ PCI_SLOT(devfn), PCI_FUNC(devfn));
++
++ out:
++ return err;
++}
++
++static int pciback_export_device(struct pciback_device *pdev,
++ int domain, int bus, int slot, int func,
++ int devid)
++{
++ struct pci_dev *dev;
++ int err = 0;
++
++ dev_dbg(&pdev->xdev->dev, "exporting dom %x bus %x slot %x func %x\n",
++ domain, bus, slot, func);
++
++ dev = pcistub_get_pci_dev_by_slot(pdev, domain, bus, slot, func);
++ if (!dev) {
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Couldn't locate PCI device "
++ "(%04x:%02x:%02x.%01x)! "
++ "perhaps already in-use?",
++ domain, bus, slot, func);
++ goto out;
++ }
++
++ err = pciback_add_pci_dev(pdev, dev, devid, pciback_publish_pci_dev);
++ if (err)
++ goto out;
++
++ /* TODO: It'd be nice to export a bridge and have all of its children
++ * get exported with it. This may be best done in xend (which will
++ * have to calculate resource usage anyway) but we probably want to
++ * put something in here to ensure that if a bridge gets given to a
++ * driver domain, that all devices under that bridge are not given
++ * to other driver domains (as he who controls the bridge can disable
++ * it and stop the other devices from working).
++ */
++ out:
++ return err;
++}
++
++static int pciback_remove_device(struct pciback_device *pdev,
++ int domain, int bus, int slot, int func)
++{
++ int err = 0;
++ struct pci_dev *dev;
++
++ dev_dbg(&pdev->xdev->dev, "removing dom %x bus %x slot %x func %x\n",
++ domain, bus, slot, func);
++
++ dev = pciback_get_pci_dev(pdev, domain, bus, PCI_DEVFN(slot, func));
++ if (!dev) {
++ err = -EINVAL;
++ dev_dbg(&pdev->xdev->dev, "Couldn't locate PCI device "
++ "(%04x:%02x:%02x.%01x)! not owned by this domain\n",
++ domain, bus, slot, func);
++ goto out;
++ }
++
++ pciback_release_pci_dev(pdev, dev);
++
++ out:
++ return err;
++}
++
++static int pciback_publish_pci_root(struct pciback_device *pdev,
++ unsigned int domain, unsigned int bus)
++{
++ unsigned int d, b;
++ int i, root_num, len, err;
++ char str[64];
++
++ dev_dbg(&pdev->xdev->dev, "Publishing pci roots\n");
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename,
++ "root_num", "%d", &root_num);
++ if (err == 0 || err == -ENOENT)
++ root_num = 0;
++ else if (err < 0)
++ goto out;
++
++ /* Verify that we haven't already published this pci root */
++ for (i = 0; i < root_num; i++) {
++ len = snprintf(str, sizeof(str), "root-%d", i);
++ if (unlikely(len >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename,
++ str, "%x:%x", &d, &b);
++ if (err < 0)
++ goto out;
++ if (err != 2) {
++ err = -EINVAL;
++ goto out;
++ }
++
++ if (d == domain && b == bus) {
++ err = 0;
++ goto out;
++ }
++ }
++
++ len = snprintf(str, sizeof(str), "root-%d", root_num);
++ if (unlikely(len >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ dev_dbg(&pdev->xdev->dev, "writing root %d at %04x:%02x\n",
++ root_num, domain, bus);
++
++ err = xenbus_printf(XBT_NIL, pdev->xdev->nodename, str,
++ "%04x:%02x", domain, bus);
++ if (err)
++ goto out;
++
++ err = xenbus_printf(XBT_NIL, pdev->xdev->nodename,
++ "root_num", "%d", (root_num + 1));
++
++ out:
++ return err;
++}
++
++static int pciback_reconfigure(struct pciback_device *pdev)
++{
++ int err = 0;
++ int num_devs;
++ int domain, bus, slot, func;
++ int substate;
++ int i, len;
++ char state_str[64];
++ char dev_str[64];
++
++ spin_lock(&pdev->dev_lock);
++
++ dev_dbg(&pdev->xdev->dev, "Reconfiguring device ...\n");
++
++ /* Make sure we only reconfigure once */
++ if (xenbus_read_driver_state(pdev->xdev->nodename) !=
++ XenbusStateReconfiguring)
++ goto out;
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename, "num_devs", "%d",
++ &num_devs);
++ if (err != 1) {
++ if (err >= 0)
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading number of devices");
++ goto out;
++ }
++
++ for (i = 0; i < num_devs; i++) {
++ len = snprintf(state_str, sizeof(state_str), "state-%d", i);
++ if (unlikely(len >= (sizeof(state_str) - 1))) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "String overflow while reading "
++ "configuration");
++ goto out;
++ }
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename, state_str,
++ "%d", &substate);
++ if (err != 1)
++ substate = XenbusStateUnknown;
++
++ switch (substate) {
++ case XenbusStateInitialising:
++ dev_dbg(&pdev->xdev->dev, "Attaching dev-%d ...\n", i);
++
++ len = snprintf(dev_str, sizeof(dev_str), "dev-%d", i);
++ if (unlikely(len >= (sizeof(dev_str) - 1))) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "String overflow while "
++ "reading configuration");
++ goto out;
++ }
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename,
++ dev_str, "%x:%x:%x.%x",
++ &domain, &bus, &slot, &func);
++ if (err < 0) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading device "
++ "configuration");
++ goto out;
++ }
++ if (err != 4) {
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error parsing pci device "
++ "configuration");
++ goto out;
++ }
++
++ err = pciback_export_device(pdev, domain, bus, slot,
++ func, i);
++ if (err)
++ goto out;
++
++ /* Publish pci roots. */
++ err = pciback_publish_pci_roots(pdev, pciback_publish_pci_root);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error while publish PCI root"
++ "buses for frontend");
++ goto out;
++ }
++
++ err = xenbus_printf(XBT_NIL, pdev->xdev->nodename,
++ state_str, "%d",
++ XenbusStateInitialised);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error switching substate of "
++ "dev-%d\n", i);
++ goto out;
++ }
++ break;
++
++ case XenbusStateClosing:
++ dev_dbg(&pdev->xdev->dev, "Detaching dev-%d ...\n", i);
++
++ len = snprintf(dev_str, sizeof(dev_str), "vdev-%d", i);
++ if (unlikely(len >= (sizeof(dev_str) - 1))) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "String overflow while "
++ "reading configuration");
++ goto out;
++ }
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename,
++ dev_str, "%x:%x:%x.%x",
++ &domain, &bus, &slot, &func);
++ if (err < 0) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading device "
++ "configuration");
++ goto out;
++ }
++ if (err != 4) {
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error parsing pci device "
++ "configuration");
++ goto out;
++ }
++
++ err = pciback_remove_device(pdev, domain, bus, slot,
++ func);
++ if(err)
++ goto out;
++
++ /* TODO: If at some point we implement support for pci
++ * root hot-remove on pcifront side, we'll need to
++ * remove unnecessary xenstore nodes of pci roots here.
++ */
++
++ break;
++
++ default:
++ break;
++ }
++ }
++
++ err = xenbus_switch_state(pdev->xdev, XenbusStateReconfigured);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error switching to reconfigured state!");
++ goto out;
++ }
++
++ out:
++ spin_unlock(&pdev->dev_lock);
++
++ return 0;
++}
++
++static void pciback_frontend_changed(struct xenbus_device *xdev,
++ enum xenbus_state fe_state)
++{
++ struct pciback_device *pdev = xdev->dev.driver_data;
++
++ dev_dbg(&xdev->dev, "fe state changed %d\n", fe_state);
++
++ switch (fe_state) {
++ case XenbusStateInitialised:
++ pciback_attach(pdev);
++ break;
++
++ case XenbusStateReconfiguring:
++ pciback_reconfigure(pdev);
++ break;
++
++ case XenbusStateConnected:
++ /* pcifront switched its state from reconfiguring to connected.
++ * Then switch to connected state.
++ */
++ xenbus_switch_state(xdev, XenbusStateConnected);
++ break;
++
++ case XenbusStateClosing:
++ pciback_disconnect(pdev);
++ xenbus_switch_state(xdev, XenbusStateClosing);
++ break;
++
++ case XenbusStateClosed:
++ pciback_disconnect(pdev);
++ xenbus_switch_state(xdev, XenbusStateClosed);
++ if (xenbus_dev_is_online(xdev))
++ break;
++ /* fall through if not online */
++ case XenbusStateUnknown:
++ dev_dbg(&xdev->dev, "frontend is gone! unregister device\n");
++ device_unregister(&xdev->dev);
++ break;
++
++ default:
++ break;
++ }
++}
++
++static int pciback_setup_backend(struct pciback_device *pdev)
++{
++ /* Get configuration from xend (if available now) */
++ int domain, bus, slot, func;
++ int err = 0;
++ int i, num_devs;
++ char dev_str[64];
++ char state_str[64];
++
++ spin_lock(&pdev->dev_lock);
++
++ /* It's possible we could get the call to setup twice, so make sure
++ * we're not already connected.
++ */
++ if (xenbus_read_driver_state(pdev->xdev->nodename) !=
++ XenbusStateInitWait)
++ goto out;
++
++ dev_dbg(&pdev->xdev->dev, "getting be setup\n");
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename, "num_devs", "%d",
++ &num_devs);
++ if (err != 1) {
++ if (err >= 0)
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading number of devices");
++ goto out;
++ }
++
++ for (i = 0; i < num_devs; i++) {
++ int l = snprintf(dev_str, sizeof(dev_str), "dev-%d", i);
++ if (unlikely(l >= (sizeof(dev_str) - 1))) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "String overflow while reading "
++ "configuration");
++ goto out;
++ }
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->nodename, dev_str,
++ "%x:%x:%x.%x", &domain, &bus, &slot, &func);
++ if (err < 0) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading device configuration");
++ goto out;
++ }
++ if (err != 4) {
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error parsing pci device "
++ "configuration");
++ goto out;
++ }
++
++ err = pciback_export_device(pdev, domain, bus, slot, func, i);
++ if (err)
++ goto out;
++
++ /* Switch substate of this device. */
++ l = snprintf(state_str, sizeof(state_str), "state-%d", i);
++ if (unlikely(l >= (sizeof(state_str) - 1))) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "String overflow while reading "
++ "configuration");
++ goto out;
++ }
++ err = xenbus_printf(XBT_NIL, pdev->xdev->nodename, state_str,
++ "%d", XenbusStateInitialised);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err, "Error switching "
++ "substate of dev-%d\n", i);
++ goto out;
++ }
++ }
++
++ err = pciback_publish_pci_roots(pdev, pciback_publish_pci_root);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error while publish PCI root buses "
++ "for frontend");
++ goto out;
++ }
++
++ err = xenbus_switch_state(pdev->xdev, XenbusStateInitialised);
++ if (err)
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error switching to initialised state!");
++
++ out:
++ spin_unlock(&pdev->dev_lock);
++
++ if (!err)
++ /* see if pcifront is already configured (if not, we'll wait) */
++ pciback_attach(pdev);
++
++ return err;
++}
++
++static void pciback_be_watch(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ struct pciback_device *pdev =
++ container_of(watch, struct pciback_device, be_watch);
++
++ switch (xenbus_read_driver_state(pdev->xdev->nodename)) {
++ case XenbusStateInitWait:
++ pciback_setup_backend(pdev);
++ break;
++
++ default:
++ break;
++ }
++}
++
++static int pciback_xenbus_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int err = 0;
++ struct pciback_device *pdev = alloc_pdev(dev);
++
++ if (pdev == NULL) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(dev, err,
++ "Error allocating pciback_device struct");
++ goto out;
++ }
++
++ /* wait for xend to configure us */
++ err = xenbus_switch_state(dev, XenbusStateInitWait);
++ if (err)
++ goto out;
++
++ /* watch the backend node for backend configuration information */
++ err = xenbus_watch_path(dev, dev->nodename, &pdev->be_watch,
++ pciback_be_watch);
++ if (err)
++ goto out;
++ pdev->be_watching = 1;
++
++ /* We need to force a call to our callback here in case
++ * xend already configured us!
++ */
++ pciback_be_watch(&pdev->be_watch, NULL, 0);
++
++ out:
++ return err;
++}
++
++static int pciback_xenbus_remove(struct xenbus_device *dev)
++{
++ struct pciback_device *pdev = dev->dev.driver_data;
++
++ if (pdev != NULL)
++ free_pdev(pdev);
++
++ return 0;
++}
++
++static const struct xenbus_device_id xenpci_ids[] = {
++ {"pci"},
++ {{0}},
++};
++
++static struct xenbus_driver xenbus_pciback_driver = {
++ .name = "pciback",
++ .owner = THIS_MODULE,
++ .ids = xenpci_ids,
++ .probe = pciback_xenbus_probe,
++ .remove = pciback_xenbus_remove,
++ .otherend_changed = pciback_frontend_changed,
++};
++
++int __init pciback_xenbus_register(void)
++{
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ return xenbus_register_backend(&xenbus_pciback_driver);
++}
++
++void __exit pciback_xenbus_unregister(void)
++{
++ xenbus_unregister_driver(&xenbus_pciback_driver);
++}
+Index: head-2008-11-25/drivers/xen/pcifront/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pcifront/Makefile 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,7 @@
++obj-y += pcifront.o
++
++pcifront-y := pci_op.o xenbus.o pci.o
++
++ifeq ($(CONFIG_XEN_PCIDEV_FE_DEBUG),y)
++EXTRA_CFLAGS += -DDEBUG
++endif
+Index: head-2008-11-25/drivers/xen/pcifront/pci.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pcifront/pci.c 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,46 @@
++/*
++ * PCI Frontend Operations - ensure only one PCI frontend runs at a time
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/pci.h>
++#include <linux/spinlock.h>
++#include "pcifront.h"
++
++DEFINE_SPINLOCK(pcifront_dev_lock);
++static struct pcifront_device *pcifront_dev = NULL;
++
++int pcifront_connect(struct pcifront_device *pdev)
++{
++ int err = 0;
++
++ spin_lock(&pcifront_dev_lock);
++
++ if (!pcifront_dev) {
++ dev_info(&pdev->xdev->dev, "Installing PCI frontend\n");
++ pcifront_dev = pdev;
++ }
++ else {
++ dev_err(&pdev->xdev->dev, "PCI frontend already installed!\n");
++ err = -EEXIST;
++ }
++
++ spin_unlock(&pcifront_dev_lock);
++
++ return err;
++}
++
++void pcifront_disconnect(struct pcifront_device *pdev)
++{
++ spin_lock(&pcifront_dev_lock);
++
++ if (pdev == pcifront_dev) {
++ dev_info(&pdev->xdev->dev,
++ "Disconnecting PCI Frontend Buses\n");
++ pcifront_dev = NULL;
++ }
++
++ spin_unlock(&pcifront_dev_lock);
++}
+Index: head-2008-11-25/drivers/xen/pcifront/pci_op.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pcifront/pci_op.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,551 @@
++/*
++ * PCI Frontend Operations - Communicates with frontend
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#include <linux/module.h>
++#include <linux/version.h>
++#include <linux/init.h>
++#include <linux/pci.h>
++#include <linux/spinlock.h>
++#include <linux/time.h>
++#include <xen/evtchn.h>
++#include "pcifront.h"
++
++static int verbose_request = 0;
++module_param(verbose_request, int, 0644);
++
++#ifdef __ia64__
++static void pcifront_init_sd(struct pcifront_sd *sd,
++ unsigned int domain, unsigned int bus,
++ struct pcifront_device *pdev)
++{
++ int err, i, j, k, len, root_num, res_count;
++ struct acpi_resource res;
++ unsigned int d, b, byte;
++ unsigned long magic;
++ char str[64], tmp[3];
++ unsigned char *buf, *bufp;
++ u8 *ptr;
++
++ memset(sd, 0, sizeof(*sd));
++
++ sd->segment = domain;
++ sd->node = -1; /* Revisit for NUMA */
++ sd->platform_data = pdev;
++
++ /* Look for resources for this controller in xenbus. */
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend, "root_num",
++ "%d", &root_num);
++ if (err != 1)
++ return;
++
++ for (i = 0; i < root_num; i++) {
++ len = snprintf(str, sizeof(str), "root-%d", i);
++ if (unlikely(len >= (sizeof(str) - 1)))
++ return;
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend,
++ str, "%x:%x", &d, &b);
++ if (err != 2)
++ return;
++
++ if (d == domain && b == bus)
++ break;
++ }
++
++ if (i == root_num)
++ return;
++
++ len = snprintf(str, sizeof(str), "root-resource-magic");
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend,
++ str, "%lx", &magic);
++
++ if (err != 1)
++ return; /* No resources, nothing to do */
++
++ if (magic != (sizeof(res) * 2) + 1) {
++ printk(KERN_WARNING "pcifront: resource magic mismatch\n");
++ return;
++ }
++
++ len = snprintf(str, sizeof(str), "root-%d-resources", i);
++ if (unlikely(len >= (sizeof(str) - 1)))
++ return;
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend,
++ str, "%d", &res_count);
++
++ if (err != 1)
++ return; /* No resources, nothing to do */
++
++ sd->window = kzalloc(sizeof(*sd->window) * res_count, GFP_KERNEL);
++ if (!sd->window)
++ return;
++
++ /* magic is also the size of the byte stream in xenbus */
++ buf = kmalloc(magic, GFP_KERNEL);
++ if (!buf) {
++ kfree(sd->window);
++ sd->window = NULL;
++ return;
++ }
++
++ /* Read the resources out of xenbus */
++ for (j = 0; j < res_count; j++) {
++ memset(&res, 0, sizeof(res));
++ memset(buf, 0, magic);
++
++ len = snprintf(str, sizeof(str), "root-%d-resource-%d", i, j);
++ if (unlikely(len >= (sizeof(str) - 1)))
++ return;
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend, str,
++ "%s", buf);
++ if (err != 1) {
++ printk(KERN_WARNING "pcifront: error reading "
++ "resource %d on bus %04x:%02x\n",
++ j, domain, bus);
++ continue;
++ }
++
++ bufp = buf;
++ ptr = (u8 *)&res;
++ memset(tmp, 0, sizeof(tmp));
++
++ /* Copy ASCII byte stream into structure */
++ for (k = 0; k < magic - 1; k += 2) {
++ memcpy(tmp, bufp, 2);
++ bufp += 2;
++
++ sscanf(tmp, "%02x", &byte);
++ *ptr = byte;
++ ptr++;
++ }
++
++ xen_add_resource(sd, domain, bus, &res);
++ sd->windows++;
++ }
++ kfree(buf);
++}
++#endif
++
++static int errno_to_pcibios_err(int errno)
++{
++ switch (errno) {
++ case XEN_PCI_ERR_success:
++ return PCIBIOS_SUCCESSFUL;
++
++ case XEN_PCI_ERR_dev_not_found:
++ return PCIBIOS_DEVICE_NOT_FOUND;
++
++ case XEN_PCI_ERR_invalid_offset:
++ case XEN_PCI_ERR_op_failed:
++ return PCIBIOS_BAD_REGISTER_NUMBER;
++
++ case XEN_PCI_ERR_not_implemented:
++ return PCIBIOS_FUNC_NOT_SUPPORTED;
++
++ case XEN_PCI_ERR_access_denied:
++ return PCIBIOS_SET_FAILED;
++ }
++ return errno;
++}
++
++static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op)
++{
++ int err = 0;
++ struct xen_pci_op *active_op = &pdev->sh_info->op;
++ unsigned long irq_flags;
++ evtchn_port_t port = pdev->evtchn;
++ s64 ns, ns_timeout;
++ struct timeval tv;
++
++ spin_lock_irqsave(&pdev->sh_info_lock, irq_flags);
++
++ memcpy(active_op, op, sizeof(struct xen_pci_op));
++
++ /* Go */
++ wmb();
++ set_bit(_XEN_PCIF_active, (unsigned long *)&pdev->sh_info->flags);
++ notify_remote_via_evtchn(port);
++
++ /*
++ * We set a poll timeout of 3 seconds but give up on return after
++ * 2 seconds. It is better to time out too late rather than too early
++ * (in the latter case we end up continually re-executing poll() with a
++ * timeout in the past). 1s difference gives plenty of slack for error.
++ */
++ do_gettimeofday(&tv);
++ ns_timeout = timeval_to_ns(&tv) + 2 * (s64)NSEC_PER_SEC;
++
++ clear_evtchn(port);
++
++ while (test_bit(_XEN_PCIF_active,
++ (unsigned long *)&pdev->sh_info->flags)) {
++ if (HYPERVISOR_poll(&port, 1, jiffies + 3*HZ))
++ BUG();
++ clear_evtchn(port);
++ do_gettimeofday(&tv);
++ ns = timeval_to_ns(&tv);
++ if (ns > ns_timeout) {
++ dev_err(&pdev->xdev->dev,
++ "pciback not responding!!!\n");
++ clear_bit(_XEN_PCIF_active,
++ (unsigned long *)&pdev->sh_info->flags);
++ err = XEN_PCI_ERR_dev_not_found;
++ goto out;
++ }
++ }
++
++ memcpy(op, active_op, sizeof(struct xen_pci_op));
++
++ err = op->err;
++ out:
++ spin_unlock_irqrestore(&pdev->sh_info_lock, irq_flags);
++ return err;
++}
++
++/* Access to this function is spinlocked in drivers/pci/access.c */
++static int pcifront_bus_read(struct pci_bus *bus, unsigned int devfn,
++ int where, int size, u32 * val)
++{
++ int err = 0;
++ struct xen_pci_op op = {
++ .cmd = XEN_PCI_OP_conf_read,
++ .domain = pci_domain_nr(bus),
++ .bus = bus->number,
++ .devfn = devfn,
++ .offset = where,
++ .size = size,
++ };
++ struct pcifront_sd *sd = bus->sysdata;
++ struct pcifront_device *pdev = pcifront_get_pdev(sd);
++
++ if (verbose_request)
++ dev_info(&pdev->xdev->dev,
++ "read dev=%04x:%02x:%02x.%01x - offset %x size %d\n",
++ pci_domain_nr(bus), bus->number, PCI_SLOT(devfn),
++ PCI_FUNC(devfn), where, size);
++
++ err = do_pci_op(pdev, &op);
++
++ if (likely(!err)) {
++ if (verbose_request)
++ dev_info(&pdev->xdev->dev, "read got back value %x\n",
++ op.value);
++
++ *val = op.value;
++ } else if (err == -ENODEV) {
++ /* No device here, pretend that it just returned 0 */
++ err = 0;
++ *val = 0;
++ }
++
++ return errno_to_pcibios_err(err);
++}
++
++/* Access to this function is spinlocked in drivers/pci/access.c */
++static int pcifront_bus_write(struct pci_bus *bus, unsigned int devfn,
++ int where, int size, u32 val)
++{
++ struct xen_pci_op op = {
++ .cmd = XEN_PCI_OP_conf_write,
++ .domain = pci_domain_nr(bus),
++ .bus = bus->number,
++ .devfn = devfn,
++ .offset = where,
++ .size = size,
++ .value = val,
++ };
++ struct pcifront_sd *sd = bus->sysdata;
++ struct pcifront_device *pdev = pcifront_get_pdev(sd);
++
++ if (verbose_request)
++ dev_info(&pdev->xdev->dev,
++ "write dev=%04x:%02x:%02x.%01x - "
++ "offset %x size %d val %x\n",
++ pci_domain_nr(bus), bus->number,
++ PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val);
++
++ return errno_to_pcibios_err(do_pci_op(pdev, &op));
++}
++
++struct pci_ops pcifront_bus_ops = {
++ .read = pcifront_bus_read,
++ .write = pcifront_bus_write,
++};
++
++#ifdef CONFIG_PCI_MSI
++int pci_frontend_enable_msix(struct pci_dev *dev,
++ struct msix_entry *entries,
++ int nvec)
++{
++ int err;
++ int i;
++ struct xen_pci_op op = {
++ .cmd = XEN_PCI_OP_enable_msix,
++ .domain = pci_domain_nr(dev->bus),
++ .bus = dev->bus->number,
++ .devfn = dev->devfn,
++ .value = nvec,
++ };
++ struct pcifront_sd *sd = dev->bus->sysdata;
++ struct pcifront_device *pdev = pcifront_get_pdev(sd);
++
++ if (nvec > SH_INFO_MAX_VEC) {
++ printk("too much vector for pci frontend%x\n", nvec);
++ return -EINVAL;
++ }
++
++ for (i = 0; i < nvec; i++) {
++ op.msix_entries[i].entry = entries[i].entry;
++ op.msix_entries[i].vector = entries[i].vector;
++ }
++
++ err = do_pci_op(pdev, &op);
++
++ if (!err) {
++ if (!op.value) {
++ /* we get the result */
++ for ( i = 0; i < nvec; i++)
++ entries[i].vector = op.msix_entries[i].vector;
++ return 0;
++ }
++ else {
++ printk("enable msix get value %x\n", op.value);
++ return op.value;
++ }
++ }
++ else {
++ printk("enable msix get err %x\n", err);
++ return err;
++ }
++}
++
++void pci_frontend_disable_msix(struct pci_dev* dev)
++{
++ int err;
++ struct xen_pci_op op = {
++ .cmd = XEN_PCI_OP_disable_msix,
++ .domain = pci_domain_nr(dev->bus),
++ .bus = dev->bus->number,
++ .devfn = dev->devfn,
++ };
++ struct pcifront_sd *sd = dev->bus->sysdata;
++ struct pcifront_device *pdev = pcifront_get_pdev(sd);
++
++ err = do_pci_op(pdev, &op);
++
++ /* What should do for error ? */
++ if (err)
++ printk("pci_disable_msix get err %x\n", err);
++}
++
++int pci_frontend_enable_msi(struct pci_dev *dev)
++{
++ int err;
++ struct xen_pci_op op = {
++ .cmd = XEN_PCI_OP_enable_msi,
++ .domain = pci_domain_nr(dev->bus),
++ .bus = dev->bus->number,
++ .devfn = dev->devfn,
++ };
++ struct pcifront_sd *sd = dev->bus->sysdata;
++ struct pcifront_device *pdev = pcifront_get_pdev(sd);
++
++ err = do_pci_op(pdev, &op);
++ if (likely(!err)) {
++ dev->irq = op.value;
++ }
++ else {
++ printk("pci frontend enable msi failed for dev %x:%x \n",
++ op.bus, op.devfn);
++ err = -EINVAL;
++ }
++ return err;
++}
++
++void pci_frontend_disable_msi(struct pci_dev* dev)
++{
++ int err;
++ struct xen_pci_op op = {
++ .cmd = XEN_PCI_OP_disable_msi,
++ .domain = pci_domain_nr(dev->bus),
++ .bus = dev->bus->number,
++ .devfn = dev->devfn,
++ };
++ struct pcifront_sd *sd = dev->bus->sysdata;
++ struct pcifront_device *pdev = pcifront_get_pdev(sd);
++
++ err = do_pci_op(pdev, &op);
++ if (err == XEN_PCI_ERR_dev_not_found) {
++ /* XXX No response from backend, what shall we do? */
++ printk("get no response from backend for disable MSI\n");
++ return;
++ }
++ if (likely(!err))
++ dev->irq = op.value;
++ else
++ /* how can pciback notify us fail? */
++ printk("get fake response frombackend \n");
++}
++#endif /* CONFIG_PCI_MSI */
++
++/* Claim resources for the PCI frontend as-is, backend won't allow changes */
++static void pcifront_claim_resource(struct pci_dev *dev, void *data)
++{
++ struct pcifront_device *pdev = data;
++ int i;
++ struct resource *r;
++
++ for (i = 0; i < PCI_NUM_RESOURCES; i++) {
++ r = &dev->resource[i];
++
++ if (!r->parent && r->start && r->flags) {
++ dev_dbg(&pdev->xdev->dev, "claiming resource %s/%d\n",
++ pci_name(dev), i);
++ pci_claim_resource(dev, i);
++ }
++ }
++}
++
++int __devinit pcifront_scan_root(struct pcifront_device *pdev,
++ unsigned int domain, unsigned int bus)
++{
++ struct pci_bus *b;
++ struct pcifront_sd *sd = NULL;
++ struct pci_bus_entry *bus_entry = NULL;
++ int err = 0;
++
++#ifndef CONFIG_PCI_DOMAINS
++ if (domain != 0) {
++ dev_err(&pdev->xdev->dev,
++ "PCI Root in non-zero PCI Domain! domain=%d\n", domain);
++ dev_err(&pdev->xdev->dev,
++ "Please compile with CONFIG_PCI_DOMAINS\n");
++ err = -EINVAL;
++ goto err_out;
++ }
++#endif
++
++ dev_info(&pdev->xdev->dev, "Creating PCI Frontend Bus %04x:%02x\n",
++ domain, bus);
++
++ bus_entry = kmalloc(sizeof(*bus_entry), GFP_KERNEL);
++ sd = kmalloc(sizeof(*sd), GFP_KERNEL);
++ if (!bus_entry || !sd) {
++ err = -ENOMEM;
++ goto err_out;
++ }
++ pcifront_init_sd(sd, domain, bus, pdev);
++
++ b = pci_scan_bus_parented(&pdev->xdev->dev, bus,
++ &pcifront_bus_ops, sd);
++ if (!b) {
++ dev_err(&pdev->xdev->dev,
++ "Error creating PCI Frontend Bus!\n");
++ err = -ENOMEM;
++ goto err_out;
++ }
++
++ pcifront_setup_root_resources(b, sd);
++ bus_entry->bus = b;
++
++ list_add(&bus_entry->list, &pdev->root_buses);
++
++ /* Claim resources before going "live" with our devices */
++ pci_walk_bus(b, pcifront_claim_resource, pdev);
++
++ pci_bus_add_devices(b);
++
++ return 0;
++
++ err_out:
++ kfree(bus_entry);
++ kfree(sd);
++
++ return err;
++}
++
++int __devinit pcifront_rescan_root(struct pcifront_device *pdev,
++ unsigned int domain, unsigned int bus)
++{
++ struct pci_bus *b;
++ struct pci_dev *d;
++ unsigned int devfn;
++
++#ifndef CONFIG_PCI_DOMAINS
++ if (domain != 0) {
++ dev_err(&pdev->xdev->dev,
++ "PCI Root in non-zero PCI Domain! domain=%d\n", domain);
++ dev_err(&pdev->xdev->dev,
++ "Please compile with CONFIG_PCI_DOMAINS\n");
++ return -EINVAL;
++ }
++#endif
++
++ dev_info(&pdev->xdev->dev, "Rescanning PCI Frontend Bus %04x:%02x\n",
++ domain, bus);
++
++ b = pci_find_bus(domain, bus);
++ if(!b)
++ /* If the bus is unknown, create it. */
++ return pcifront_scan_root(pdev, domain, bus);
++
++ /* Rescan the bus for newly attached functions and add.
++ * We omit handling of PCI bridge attachment because pciback prevents
++ * bridges from being exported.
++ */
++ for (devfn = 0; devfn < 0x100; devfn++) {
++ d = pci_get_slot(b, devfn);
++ if(d) {
++ /* Device is already known. */
++ pci_dev_put(d);
++ continue;
++ }
++
++ d = pci_scan_single_device(b, devfn);
++ if (d) {
++ dev_info(&pdev->xdev->dev, "New device on "
++ "%04x:%02x:%02x.%02x found.\n", domain, bus,
++ PCI_SLOT(devfn), PCI_FUNC(devfn));
++ pci_bus_add_device(d);
++ }
++ }
++
++ return 0;
++}
++
++static void free_root_bus_devs(struct pci_bus *bus)
++{
++ struct pci_dev *dev;
++
++ while (!list_empty(&bus->devices)) {
++ dev = container_of(bus->devices.next, struct pci_dev,
++ bus_list);
++ dev_dbg(&dev->dev, "removing device\n");
++ pci_remove_bus_device(dev);
++ }
++}
++
++void pcifront_free_roots(struct pcifront_device *pdev)
++{
++ struct pci_bus_entry *bus_entry, *t;
++
++ dev_dbg(&pdev->xdev->dev, "cleaning up root buses\n");
++
++ list_for_each_entry_safe(bus_entry, t, &pdev->root_buses, list) {
++ list_del(&bus_entry->list);
++
++ free_root_bus_devs(bus_entry->bus);
++
++ kfree(bus_entry->bus->sysdata);
++
++ device_unregister(bus_entry->bus->bridge);
++ pci_remove_bus(bus_entry->bus);
++
++ kfree(bus_entry);
++ }
++}
+Index: head-2008-11-25/drivers/xen/pcifront/pcifront.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pcifront/pcifront.h 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,42 @@
++/*
++ * PCI Frontend - Common data structures & function declarations
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#ifndef __XEN_PCIFRONT_H__
++#define __XEN_PCIFRONT_H__
++
++#include <linux/spinlock.h>
++#include <linux/pci.h>
++#include <xen/xenbus.h>
++#include <xen/interface/io/pciif.h>
++#include <xen/pcifront.h>
++
++struct pci_bus_entry {
++ struct list_head list;
++ struct pci_bus *bus;
++};
++
++struct pcifront_device {
++ struct xenbus_device *xdev;
++ struct list_head root_buses;
++ spinlock_t dev_lock;
++
++ int evtchn;
++ int gnt_ref;
++
++ /* Lock this when doing any operations in sh_info */
++ spinlock_t sh_info_lock;
++ struct xen_pci_sharedinfo *sh_info;
++};
++
++int pcifront_connect(struct pcifront_device *pdev);
++void pcifront_disconnect(struct pcifront_device *pdev);
++
++int pcifront_scan_root(struct pcifront_device *pdev,
++ unsigned int domain, unsigned int bus);
++int pcifront_rescan_root(struct pcifront_device *pdev,
++ unsigned int domain, unsigned int bus);
++void pcifront_free_roots(struct pcifront_device *pdev);
++
++#endif /* __XEN_PCIFRONT_H__ */
+Index: head-2008-11-25/drivers/xen/pcifront/xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/pcifront/xenbus.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,455 @@
++/*
++ * PCI Frontend Xenbus Setup - handles setup with backend (imports page/evtchn)
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/mm.h>
++#include <xen/xenbus.h>
++#include <xen/gnttab.h>
++#include "pcifront.h"
++
++#ifndef __init_refok
++#define __init_refok
++#endif
++
++#define INVALID_GRANT_REF (0)
++#define INVALID_EVTCHN (-1)
++
++static struct pcifront_device *alloc_pdev(struct xenbus_device *xdev)
++{
++ struct pcifront_device *pdev;
++
++ pdev = kzalloc(sizeof(struct pcifront_device), GFP_KERNEL);
++ if (pdev == NULL)
++ goto out;
++
++ pdev->sh_info =
++ (struct xen_pci_sharedinfo *)__get_free_page(GFP_KERNEL);
++ if (pdev->sh_info == NULL) {
++ kfree(pdev);
++ pdev = NULL;
++ goto out;
++ }
++ pdev->sh_info->flags = 0;
++
++ xdev->dev.driver_data = pdev;
++ pdev->xdev = xdev;
++
++ INIT_LIST_HEAD(&pdev->root_buses);
++
++ spin_lock_init(&pdev->dev_lock);
++ spin_lock_init(&pdev->sh_info_lock);
++
++ pdev->evtchn = INVALID_EVTCHN;
++ pdev->gnt_ref = INVALID_GRANT_REF;
++
++ dev_dbg(&xdev->dev, "Allocated pdev @ 0x%p pdev->sh_info @ 0x%p\n",
++ pdev, pdev->sh_info);
++ out:
++ return pdev;
++}
++
++static void free_pdev(struct pcifront_device *pdev)
++{
++ dev_dbg(&pdev->xdev->dev, "freeing pdev @ 0x%p\n", pdev);
++
++ pcifront_free_roots(pdev);
++
++ if (pdev->evtchn != INVALID_EVTCHN)
++ xenbus_free_evtchn(pdev->xdev, pdev->evtchn);
++
++ if (pdev->gnt_ref != INVALID_GRANT_REF)
++ gnttab_end_foreign_access(pdev->gnt_ref,
++ (unsigned long)pdev->sh_info);
++
++ pdev->xdev->dev.driver_data = NULL;
++
++ kfree(pdev);
++}
++
++static int pcifront_publish_info(struct pcifront_device *pdev)
++{
++ int err = 0;
++ struct xenbus_transaction trans;
++
++ err = xenbus_grant_ring(pdev->xdev, virt_to_mfn(pdev->sh_info));
++ if (err < 0)
++ goto out;
++
++ pdev->gnt_ref = err;
++
++ err = xenbus_alloc_evtchn(pdev->xdev, &pdev->evtchn);
++ if (err)
++ goto out;
++
++ do_publish:
++ err = xenbus_transaction_start(&trans);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error writing configuration for backend "
++ "(start transaction)");
++ goto out;
++ }
++
++ err = xenbus_printf(trans, pdev->xdev->nodename,
++ "pci-op-ref", "%u", pdev->gnt_ref);
++ if (!err)
++ err = xenbus_printf(trans, pdev->xdev->nodename,
++ "event-channel", "%u", pdev->evtchn);
++ if (!err)
++ err = xenbus_printf(trans, pdev->xdev->nodename,
++ "magic", XEN_PCI_MAGIC);
++
++ if (err) {
++ xenbus_transaction_end(trans, 1);
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error writing configuration for backend");
++ goto out;
++ } else {
++ err = xenbus_transaction_end(trans, 0);
++ if (err == -EAGAIN)
++ goto do_publish;
++ else if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error completing transaction "
++ "for backend");
++ goto out;
++ }
++ }
++
++ xenbus_switch_state(pdev->xdev, XenbusStateInitialised);
++
++ dev_dbg(&pdev->xdev->dev, "publishing successful!\n");
++
++ out:
++ return err;
++}
++
++static int __devinit pcifront_try_connect(struct pcifront_device *pdev)
++{
++ int err = -EFAULT;
++ int i, num_roots, len;
++ char str[64];
++ unsigned int domain, bus;
++
++ spin_lock(&pdev->dev_lock);
++
++ /* Only connect once */
++ if (xenbus_read_driver_state(pdev->xdev->nodename) !=
++ XenbusStateInitialised)
++ goto out;
++
++ err = pcifront_connect(pdev);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error connecting PCI Frontend");
++ goto out;
++ }
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend,
++ "root_num", "%d", &num_roots);
++ if (err == -ENOENT) {
++ xenbus_dev_error(pdev->xdev, err,
++ "No PCI Roots found, trying 0000:00");
++ err = pcifront_scan_root(pdev, 0, 0);
++ num_roots = 0;
++ } else if (err != 1) {
++ if (err == 0)
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading number of PCI roots");
++ goto out;
++ }
++
++ for (i = 0; i < num_roots; i++) {
++ len = snprintf(str, sizeof(str), "root-%d", i);
++ if (unlikely(len >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend, str,
++ "%x:%x", &domain, &bus);
++ if (err != 2) {
++ if (err >= 0)
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading PCI root %d", i);
++ goto out;
++ }
++
++ err = pcifront_scan_root(pdev, domain, bus);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error scanning PCI root %04x:%02x",
++ domain, bus);
++ goto out;
++ }
++ }
++
++ err = xenbus_switch_state(pdev->xdev, XenbusStateConnected);
++ if (err)
++ goto out;
++
++ out:
++ spin_unlock(&pdev->dev_lock);
++ return err;
++}
++
++static int pcifront_try_disconnect(struct pcifront_device *pdev)
++{
++ int err = 0;
++ enum xenbus_state prev_state;
++
++ spin_lock(&pdev->dev_lock);
++
++ prev_state = xenbus_read_driver_state(pdev->xdev->nodename);
++
++ if (prev_state >= XenbusStateClosing)
++ goto out;
++
++ if(prev_state == XenbusStateConnected) {
++ pcifront_free_roots(pdev);
++ pcifront_disconnect(pdev);
++ }
++
++ err = xenbus_switch_state(pdev->xdev, XenbusStateClosed);
++
++ out:
++ spin_unlock(&pdev->dev_lock);
++
++ return err;
++}
++
++static int __devinit pcifront_attach_devices(struct pcifront_device *pdev)
++{
++ int err = -EFAULT;
++ int i, num_roots, len;
++ unsigned int domain, bus;
++ char str[64];
++
++ spin_lock(&pdev->dev_lock);
++
++ if (xenbus_read_driver_state(pdev->xdev->nodename) !=
++ XenbusStateReconfiguring)
++ goto out;
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend,
++ "root_num", "%d", &num_roots);
++ if (err == -ENOENT) {
++ xenbus_dev_error(pdev->xdev, err,
++ "No PCI Roots found, trying 0000:00");
++ err = pcifront_rescan_root(pdev, 0, 0);
++ num_roots = 0;
++ } else if (err != 1) {
++ if (err == 0)
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading number of PCI roots");
++ goto out;
++ }
++
++ for (i = 0; i < num_roots; i++) {
++ len = snprintf(str, sizeof(str), "root-%d", i);
++ if (unlikely(len >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend, str,
++ "%x:%x", &domain, &bus);
++ if (err != 2) {
++ if (err >= 0)
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading PCI root %d", i);
++ goto out;
++ }
++
++ err = pcifront_rescan_root(pdev, domain, bus);
++ if (err) {
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error scanning PCI root %04x:%02x",
++ domain, bus);
++ goto out;
++ }
++ }
++
++ xenbus_switch_state(pdev->xdev, XenbusStateConnected);
++
++ out:
++ spin_unlock(&pdev->dev_lock);
++ return err;
++}
++
++static int pcifront_detach_devices(struct pcifront_device *pdev)
++{
++ int err = 0;
++ int i, num_devs;
++ unsigned int domain, bus, slot, func;
++ struct pci_bus *pci_bus;
++ struct pci_dev *pci_dev;
++ char str[64];
++
++ spin_lock(&pdev->dev_lock);
++
++ if (xenbus_read_driver_state(pdev->xdev->nodename) !=
++ XenbusStateConnected)
++ goto out;
++
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend, "num_devs", "%d",
++ &num_devs);
++ if (err != 1) {
++ if (err >= 0)
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading number of PCI devices");
++ goto out;
++ }
++
++ /* Find devices being detached and remove them. */
++ for (i = 0; i < num_devs; i++) {
++ int l, state;
++ l = snprintf(str, sizeof(str), "state-%d", i);
++ if (unlikely(l >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend, str, "%d",
++ &state);
++ if (err != 1)
++ state = XenbusStateUnknown;
++
++ if (state != XenbusStateClosing)
++ continue;
++
++ /* Remove device. */
++ l = snprintf(str, sizeof(str), "vdev-%d", i);
++ if (unlikely(l >= (sizeof(str) - 1))) {
++ err = -ENOMEM;
++ goto out;
++ }
++ err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend, str,
++ "%x:%x:%x.%x", &domain, &bus, &slot, &func);
++ if (err != 4) {
++ if (err >= 0)
++ err = -EINVAL;
++ xenbus_dev_fatal(pdev->xdev, err,
++ "Error reading PCI device %d", i);
++ goto out;
++ }
++
++ pci_bus = pci_find_bus(domain, bus);
++ if(!pci_bus) {
++ dev_dbg(&pdev->xdev->dev, "Cannot get bus %04x:%02x\n",
++ domain, bus);
++ continue;
++ }
++ pci_dev = pci_get_slot(pci_bus, PCI_DEVFN(slot, func));
++ if(!pci_dev) {
++ dev_dbg(&pdev->xdev->dev,
++ "Cannot get PCI device %04x:%02x:%02x.%02x\n",
++ domain, bus, slot, func);
++ continue;
++ }
++ pci_remove_bus_device(pci_dev);
++ pci_dev_put(pci_dev);
++
++ dev_dbg(&pdev->xdev->dev,
++ "PCI device %04x:%02x:%02x.%02x removed.\n",
++ domain, bus, slot, func);
++ }
++
++ err = xenbus_switch_state(pdev->xdev, XenbusStateReconfiguring);
++
++ out:
++ spin_unlock(&pdev->dev_lock);
++ return err;
++}
++
++static void __init_refok pcifront_backend_changed(struct xenbus_device *xdev,
++ enum xenbus_state be_state)
++{
++ struct pcifront_device *pdev = xdev->dev.driver_data;
++
++ switch (be_state) {
++ case XenbusStateUnknown:
++ case XenbusStateInitialising:
++ case XenbusStateInitWait:
++ case XenbusStateInitialised:
++ case XenbusStateClosed:
++ break;
++
++ case XenbusStateConnected:
++ pcifront_try_connect(pdev);
++ break;
++
++ case XenbusStateClosing:
++ dev_warn(&xdev->dev, "backend going away!\n");
++ pcifront_try_disconnect(pdev);
++ break;
++
++ case XenbusStateReconfiguring:
++ pcifront_detach_devices(pdev);
++ break;
++
++ case XenbusStateReconfigured:
++ pcifront_attach_devices(pdev);
++ break;
++ }
++}
++
++static int pcifront_xenbus_probe(struct xenbus_device *xdev,
++ const struct xenbus_device_id *id)
++{
++ int err = 0;
++ struct pcifront_device *pdev = alloc_pdev(xdev);
++
++ if (pdev == NULL) {
++ err = -ENOMEM;
++ xenbus_dev_fatal(xdev, err,
++ "Error allocating pcifront_device struct");
++ goto out;
++ }
++
++ err = pcifront_publish_info(pdev);
++
++ out:
++ return err;
++}
++
++static int pcifront_xenbus_remove(struct xenbus_device *xdev)
++{
++ if (xdev->dev.driver_data)
++ free_pdev(xdev->dev.driver_data);
++
++ return 0;
++}
++
++static const struct xenbus_device_id xenpci_ids[] = {
++ {"pci"},
++ {{0}},
++};
++MODULE_ALIAS("xen:pci");
++
++static struct xenbus_driver xenbus_pcifront_driver = {
++ .name = "pcifront",
++ .owner = THIS_MODULE,
++ .ids = xenpci_ids,
++ .probe = pcifront_xenbus_probe,
++ .remove = pcifront_xenbus_remove,
++ .otherend_changed = pcifront_backend_changed,
++};
++
++static int __init pcifront_init(void)
++{
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ return xenbus_register_frontend(&xenbus_pcifront_driver);
++}
++
++/* Initialize after the Xen PCI Frontend Stub is initialized */
++subsys_initcall(pcifront_init);
+Index: head-2008-11-25/drivers/xen/privcmd/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/privcmd/Makefile 2007-07-10 09:42:30.000000000 +0200
+@@ -0,0 +1,3 @@
++
++obj-y += privcmd.o
++obj-$(CONFIG_COMPAT) += compat_privcmd.o
+Index: head-2008-11-25/drivers/xen/privcmd/compat_privcmd.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/privcmd/compat_privcmd.c 2007-07-10 09:42:30.000000000 +0200
+@@ -0,0 +1,73 @@
++/*
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Copyright (C) IBM Corp. 2006
++ *
++ * Authors: Jimi Xenidis <jimix@watson.ibm.com>
++ */
++
++#include <linux/config.h>
++#include <linux/compat.h>
++#include <linux/ioctl.h>
++#include <linux/syscalls.h>
++#include <asm/hypervisor.h>
++#include <asm/uaccess.h>
++#include <xen/public/privcmd.h>
++#include <xen/compat_ioctl.h>
++
++int privcmd_ioctl_32(int fd, unsigned int cmd, unsigned long arg)
++{
++ int ret;
++
++ switch (cmd) {
++ case IOCTL_PRIVCMD_MMAP_32: {
++ struct privcmd_mmap *p;
++ struct privcmd_mmap_32 *p32;
++ struct privcmd_mmap_32 n32;
++
++ p32 = compat_ptr(arg);
++ p = compat_alloc_user_space(sizeof(*p));
++ if (copy_from_user(&n32, p32, sizeof(n32)) ||
++ put_user(n32.num, &p->num) ||
++ put_user(n32.dom, &p->dom) ||
++ put_user(compat_ptr(n32.entry), &p->entry))
++ return -EFAULT;
++
++ ret = sys_ioctl(fd, IOCTL_PRIVCMD_MMAP, (unsigned long)p);
++ }
++ break;
++ case IOCTL_PRIVCMD_MMAPBATCH_32: {
++ struct privcmd_mmapbatch *p;
++ struct privcmd_mmapbatch_32 *p32;
++ struct privcmd_mmapbatch_32 n32;
++
++ p32 = compat_ptr(arg);
++ p = compat_alloc_user_space(sizeof(*p));
++ if (copy_from_user(&n32, p32, sizeof(n32)) ||
++ put_user(n32.num, &p->num) ||
++ put_user(n32.dom, &p->dom) ||
++ put_user(n32.addr, &p->addr) ||
++ put_user(compat_ptr(n32.arr), &p->arr))
++ return -EFAULT;
++
++ ret = sys_ioctl(fd, IOCTL_PRIVCMD_MMAPBATCH, (unsigned long)p);
++ }
++ break;
++ default:
++ ret = -EINVAL;
++ break;
++ }
++ return ret;
++}
+Index: head-2008-11-25/drivers/xen/privcmd/privcmd.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/privcmd/privcmd.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,356 @@
++/******************************************************************************
++ * privcmd.c
++ *
++ * Interface to privileged domain-0 commands.
++ *
++ * Copyright (c) 2002-2004, K A Fraser, B Dragovic
++ */
++
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/string.h>
++#include <linux/errno.h>
++#include <linux/mm.h>
++#include <linux/mman.h>
++#include <linux/swap.h>
++#include <linux/smp_lock.h>
++#include <linux/highmem.h>
++#include <linux/pagemap.h>
++#include <linux/seq_file.h>
++#include <asm/hypervisor.h>
++
++#include <asm/pgalloc.h>
++#include <asm/pgtable.h>
++#include <asm/uaccess.h>
++#include <asm/tlb.h>
++#include <asm/hypervisor.h>
++#include <xen/public/privcmd.h>
++#include <xen/interface/xen.h>
++#include <xen/xen_proc.h>
++#include <xen/features.h>
++
++static struct proc_dir_entry *privcmd_intf;
++static struct proc_dir_entry *capabilities_intf;
++
++#ifndef HAVE_ARCH_PRIVCMD_MMAP
++static int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma);
++#endif
++
++static long privcmd_ioctl(struct file *file,
++ unsigned int cmd, unsigned long data)
++{
++ int ret = -ENOSYS;
++ void __user *udata = (void __user *) data;
++
++ switch (cmd) {
++ case IOCTL_PRIVCMD_HYPERCALL: {
++ privcmd_hypercall_t hypercall;
++
++ if (copy_from_user(&hypercall, udata, sizeof(hypercall)))
++ return -EFAULT;
++
++#if defined(__i386__)
++ if (hypercall.op >= (PAGE_SIZE >> 5))
++ break;
++ __asm__ __volatile__ (
++ "pushl %%ebx; pushl %%ecx; pushl %%edx; "
++ "pushl %%esi; pushl %%edi; "
++ "movl 8(%%eax),%%ebx ;"
++ "movl 16(%%eax),%%ecx ;"
++ "movl 24(%%eax),%%edx ;"
++ "movl 32(%%eax),%%esi ;"
++ "movl 40(%%eax),%%edi ;"
++ "movl (%%eax),%%eax ;"
++ "shll $5,%%eax ;"
++ "addl $hypercall_page,%%eax ;"
++ "call *%%eax ;"
++ "popl %%edi; popl %%esi; popl %%edx; "
++ "popl %%ecx; popl %%ebx"
++ : "=a" (ret) : "0" (&hypercall) : "memory" );
++#elif defined (__x86_64__)
++ if (hypercall.op < (PAGE_SIZE >> 5)) {
++ long ign1, ign2, ign3;
++ __asm__ __volatile__ (
++ "movq %8,%%r10; movq %9,%%r8;"
++ "shll $5,%%eax ;"
++ "addq $hypercall_page,%%rax ;"
++ "call *%%rax"
++ : "=a" (ret), "=D" (ign1),
++ "=S" (ign2), "=d" (ign3)
++ : "0" ((unsigned int)hypercall.op),
++ "1" (hypercall.arg[0]),
++ "2" (hypercall.arg[1]),
++ "3" (hypercall.arg[2]),
++ "g" (hypercall.arg[3]),
++ "g" (hypercall.arg[4])
++ : "r8", "r10", "memory" );
++ }
++#else
++ ret = privcmd_hypercall(&hypercall);
++#endif
++ }
++ break;
++
++ case IOCTL_PRIVCMD_MMAP: {
++#define MMAP_NR_PER_PAGE (int)((PAGE_SIZE-sizeof(struct list_head))/sizeof(privcmd_mmap_entry_t))
++ privcmd_mmap_t mmapcmd;
++ privcmd_mmap_entry_t *msg;
++ privcmd_mmap_entry_t __user *p;
++ struct mm_struct *mm = current->mm;
++ struct vm_area_struct *vma;
++ unsigned long va;
++ int i, rc;
++ LIST_HEAD(pagelist);
++ struct list_head *l,*l2;
++
++ if (!is_initial_xendomain())
++ return -EPERM;
++
++ if (copy_from_user(&mmapcmd, udata, sizeof(mmapcmd)))
++ return -EFAULT;
++
++ p = mmapcmd.entry;
++ for (i = 0; i < mmapcmd.num;) {
++ int nr = min(mmapcmd.num - i, MMAP_NR_PER_PAGE);
++
++ rc = -ENOMEM;
++ l = (struct list_head *) __get_free_page(GFP_KERNEL);
++ if (l == NULL)
++ goto mmap_out;
++
++ INIT_LIST_HEAD(l);
++ list_add_tail(l, &pagelist);
++ msg = (privcmd_mmap_entry_t*)(l + 1);
++
++ rc = -EFAULT;
++ if (copy_from_user(msg, p, nr*sizeof(*msg)))
++ goto mmap_out;
++ i += nr;
++ p += nr;
++ }
++
++ l = pagelist.next;
++ msg = (privcmd_mmap_entry_t*)(l + 1);
++
++ down_write(&mm->mmap_sem);
++
++ vma = find_vma(mm, msg->va);
++ rc = -EINVAL;
++ if (!vma || (msg->va != vma->vm_start) ||
++ !privcmd_enforce_singleshot_mapping(vma))
++ goto mmap_out;
++
++ va = vma->vm_start;
++
++ i = 0;
++ list_for_each(l, &pagelist) {
++ int nr = i + min(mmapcmd.num - i, MMAP_NR_PER_PAGE);
++
++ msg = (privcmd_mmap_entry_t*)(l + 1);
++ while (i<nr) {
++
++ /* Do not allow range to wrap the address space. */
++ rc = -EINVAL;
++ if ((msg->npages > (LONG_MAX >> PAGE_SHIFT)) ||
++ ((unsigned long)(msg->npages << PAGE_SHIFT) >= -va))
++ goto mmap_out;
++
++ /* Range chunks must be contiguous in va space. */
++ if ((msg->va != va) ||
++ ((msg->va+(msg->npages<<PAGE_SHIFT)) > vma->vm_end))
++ goto mmap_out;
++
++ if ((rc = direct_remap_pfn_range(
++ vma,
++ msg->va & PAGE_MASK,
++ msg->mfn,
++ msg->npages << PAGE_SHIFT,
++ vma->vm_page_prot,
++ mmapcmd.dom)) < 0)
++ goto mmap_out;
++
++ va += msg->npages << PAGE_SHIFT;
++ msg++;
++ i++;
++ }
++ }
++
++ rc = 0;
++
++ mmap_out:
++ up_write(&mm->mmap_sem);
++ list_for_each_safe(l,l2,&pagelist)
++ free_page((unsigned long)l);
++ ret = rc;
++ }
++#undef MMAP_NR_PER_PAGE
++ break;
++
++ case IOCTL_PRIVCMD_MMAPBATCH: {
++#define MMAPBATCH_NR_PER_PAGE (unsigned long)((PAGE_SIZE-sizeof(struct list_head))/sizeof(unsigned long))
++ privcmd_mmapbatch_t m;
++ struct mm_struct *mm = current->mm;
++ struct vm_area_struct *vma;
++ xen_pfn_t __user *p;
++ unsigned long addr, *mfn, nr_pages;
++ int i;
++ LIST_HEAD(pagelist);
++ struct list_head *l, *l2;
++
++ if (!is_initial_xendomain())
++ return -EPERM;
++
++ if (copy_from_user(&m, udata, sizeof(m)))
++ return -EFAULT;
++
++ nr_pages = m.num;
++ if ((m.num <= 0) || (nr_pages > (LONG_MAX >> PAGE_SHIFT)))
++ return -EINVAL;
++
++ p = m.arr;
++ for (i=0; i<nr_pages; ) {
++ int nr = min(nr_pages - i, MMAPBATCH_NR_PER_PAGE);
++
++ ret = -ENOMEM;
++ l = (struct list_head *)__get_free_page(GFP_KERNEL);
++ if (l == NULL)
++ goto mmapbatch_out;
++
++ INIT_LIST_HEAD(l);
++ list_add_tail(l, &pagelist);
++
++ mfn = (unsigned long*)(l + 1);
++ ret = -EFAULT;
++ if (copy_from_user(mfn, p, nr*sizeof(*mfn)))
++ goto mmapbatch_out;
++
++ i += nr; p+= nr;
++ }
++
++ down_write(&mm->mmap_sem);
++
++ vma = find_vma(mm, m.addr);
++ ret = -EINVAL;
++ if (!vma ||
++ (m.addr != vma->vm_start) ||
++ ((m.addr + (nr_pages << PAGE_SHIFT)) != vma->vm_end) ||
++ !privcmd_enforce_singleshot_mapping(vma)) {
++ up_write(&mm->mmap_sem);
++ goto mmapbatch_out;
++ }
++
++ p = m.arr;
++ addr = m.addr;
++ i = 0;
++ ret = 0;
++ list_for_each(l, &pagelist) {
++ int nr = i + min(nr_pages - i, MMAPBATCH_NR_PER_PAGE);
++ mfn = (unsigned long *)(l + 1);
++
++ while (i<nr) {
++ if(direct_remap_pfn_range(vma, addr & PAGE_MASK,
++ *mfn, PAGE_SIZE,
++ vma->vm_page_prot, m.dom) < 0) {
++ *mfn |= 0xf0000000U;
++ ret++;
++ }
++ mfn++; i++; addr += PAGE_SIZE;
++ }
++ }
++
++ up_write(&mm->mmap_sem);
++ if (ret > 0) {
++ p = m.arr;
++ i = 0;
++ ret = 0;
++ list_for_each(l, &pagelist) {
++ int nr = min(nr_pages - i, MMAPBATCH_NR_PER_PAGE);
++ mfn = (unsigned long *)(l + 1);
++ if (copy_to_user(p, mfn, nr*sizeof(*mfn)))
++ ret = -EFAULT;
++ i += nr; p += nr;
++ }
++ }
++ mmapbatch_out:
++ list_for_each_safe(l,l2,&pagelist)
++ free_page((unsigned long)l);
++#undef MMAPBATCH_NR_PER_PAGE
++ }
++ break;
++
++ default:
++ ret = -EINVAL;
++ break;
++ }
++
++ return ret;
++}
++
++#ifndef HAVE_ARCH_PRIVCMD_MMAP
++static struct page *privcmd_nopage(struct vm_area_struct *vma,
++ unsigned long address,
++ int *type)
++{
++ return NOPAGE_SIGBUS;
++}
++
++static struct vm_operations_struct privcmd_vm_ops = {
++ .nopage = privcmd_nopage
++};
++
++static int privcmd_mmap(struct file * file, struct vm_area_struct * vma)
++{
++ /* Unsupported for auto-translate guests. */
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return -ENOSYS;
++
++ /* DONTCOPY is essential for Xen as copy_page_range is broken. */
++ vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY;
++ vma->vm_ops = &privcmd_vm_ops;
++ vma->vm_private_data = NULL;
++
++ return 0;
++}
++
++static int privcmd_enforce_singleshot_mapping(struct vm_area_struct *vma)
++{
++ return (xchg(&vma->vm_private_data, (void *)1) == NULL);
++}
++#endif
++
++static const struct file_operations privcmd_file_ops = {
++ .unlocked_ioctl = privcmd_ioctl,
++ .mmap = privcmd_mmap,
++};
++
++static int capabilities_read(char *page, char **start, off_t off,
++ int count, int *eof, void *data)
++{
++ int len = 0;
++ *page = 0;
++
++ if (is_initial_xendomain())
++ len = sprintf( page, "control_d\n" );
++
++ *eof = 1;
++ return len;
++}
++
++static int __init privcmd_init(void)
++{
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ privcmd_intf = create_xen_proc_entry("privcmd", 0400);
++ if (privcmd_intf != NULL)
++ privcmd_intf->proc_fops = &privcmd_file_ops;
++
++ capabilities_intf = create_xen_proc_entry("capabilities", 0400 );
++ if (capabilities_intf != NULL)
++ capabilities_intf->read_proc = capabilities_read;
++
++ return 0;
++}
++
++__initcall(privcmd_init);
+Index: head-2008-11-25/drivers/xen/scsiback/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsiback/Makefile 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,4 @@
++obj-$(CONFIG_XEN_SCSI_BACKEND) := xen-scsibk.o
++
++xen-scsibk-y := interface.o scsiback.o xenbus.o translate.o emulate.o
++
+Index: head-2008-11-25/drivers/xen/scsiback/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsiback/common.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,181 @@
++/*
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * Based on the blkback driver code.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __SCSIIF__BACKEND__COMMON_H__
++#define __SCSIIF__BACKEND__COMMON_H__
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/interrupt.h>
++#include <linux/slab.h>
++#include <linux/vmalloc.h>
++#include <linux/wait.h>
++#include <linux/sched.h>
++#include <linux/kthread.h>
++#include <linux/blkdev.h>
++#include <linux/list.h>
++#include <linux/kthread.h>
++#include <scsi/scsi.h>
++#include <scsi/scsi_cmnd.h>
++#include <scsi/scsi_host.h>
++#include <scsi/scsi_device.h>
++#include <scsi/scsi_dbg.h>
++#include <scsi/scsi_eh.h>
++#include <asm/io.h>
++#include <asm/setup.h>
++#include <asm/pgalloc.h>
++#include <asm/delay.h>
++#include <xen/evtchn.h>
++#include <asm/hypervisor.h>
++#include <xen/gnttab.h>
++#include <xen/driver_util.h>
++#include <xen/xenbus.h>
++#include <xen/interface/io/ring.h>
++#include <xen/interface/grant_table.h>
++#include <xen/interface/io/vscsiif.h>
++
++
++#define DPRINTK(_f, _a...) \
++ pr_debug("(file=%s, line=%d) " _f, \
++ __FILE__ , __LINE__ , ## _a )
++
++struct ids_tuple {
++ unsigned int hst; /* host */
++ unsigned int chn; /* channel */
++ unsigned int tgt; /* target */
++ unsigned int lun; /* LUN */
++};
++
++struct v2p_entry {
++ struct ids_tuple v; /* translate from */
++ struct scsi_device *sdev; /* translate to */
++ struct list_head l;
++};
++
++struct vscsibk_info {
++ struct xenbus_device *dev;
++
++ domid_t domid;
++ unsigned int evtchn;
++ unsigned int irq;
++
++ struct vscsiif_back_ring ring;
++ struct vm_struct *ring_area;
++ grant_handle_t shmem_handle;
++ grant_ref_t shmem_ref;
++
++ spinlock_t ring_lock;
++ atomic_t nr_unreplied_reqs;
++
++ spinlock_t v2p_lock;
++ struct list_head v2p_entry_lists;
++
++ struct task_struct *kthread;
++ wait_queue_head_t waiting_to_free;
++ wait_queue_head_t wq;
++ unsigned int waiting_reqs;
++ struct page **mmap_pages;
++
++};
++
++typedef struct {
++ unsigned char act;
++ struct vscsibk_info *info;
++ struct scsi_device *sdev;
++
++ uint16_t rqid;
++
++ uint8_t nr_segments;
++ uint8_t cmnd[VSCSIIF_MAX_COMMAND_SIZE];
++ uint8_t cmd_len;
++
++ uint8_t sc_data_direction;
++ uint16_t timeout_per_command;
++
++ uint32_t request_bufflen;
++ struct scatterlist *sgl;
++ grant_ref_t gref[VSCSIIF_SG_TABLESIZE];
++
++ int32_t rslt;
++ uint32_t resid;
++ uint8_t sense_buffer[VSCSIIF_SENSE_BUFFERSIZE];
++
++ struct list_head free_list;
++} pending_req_t;
++
++
++
++#define scsiback_get(_b) (atomic_inc(&(_b)->nr_unreplied_reqs))
++#define scsiback_put(_b) \
++ do { \
++ if (atomic_dec_and_test(&(_b)->nr_unreplied_reqs)) \
++ wake_up(&(_b)->waiting_to_free);\
++ } while (0)
++
++#define VSCSIIF_TIMEOUT (900*HZ)
++
++
++irqreturn_t scsiback_intr(int, void *, struct pt_regs *);
++int scsiback_init_sring(struct vscsibk_info *info,
++ unsigned long ring_ref, unsigned int evtchn);
++int scsiback_schedule(void *data);
++
++
++struct vscsibk_info *vscsibk_info_alloc(domid_t domid);
++void scsiback_free(struct vscsibk_info *info);
++void scsiback_disconnect(struct vscsibk_info *info);
++int __init scsiback_interface_init(void);
++void scsiback_interface_exit(void);
++int scsiback_xenbus_init(void);
++void scsiback_xenbus_unregister(void);
++
++void scsiback_init_translation_table(struct vscsibk_info *info);
++
++int scsiback_add_translation_entry(struct vscsibk_info *info,
++ struct scsi_device *sdev, struct ids_tuple *v);
++
++int scsiback_del_translation_entry(struct vscsibk_info *info,
++ struct ids_tuple *v);
++struct scsi_device *scsiback_do_translation(struct vscsibk_info *info,
++ struct ids_tuple *v);
++void scsiback_release_translation_entry(struct vscsibk_info *info);
++
++
++void scsiback_cmd_exec(pending_req_t *pending_req);
++void scsiback_do_resp_with_sense(char *sense_buffer, int32_t result,
++ uint32_t resid, pending_req_t *pending_req);
++void scsiback_fast_flush_area(pending_req_t *req);
++
++void scsiback_rsp_emulation(pending_req_t *pending_req);
++void scsiback_req_emulation_or_cmdexec(pending_req_t *pending_req);
++void scsiback_emulation_init(void);
++
++
++#endif /* __SCSIIF__BACKEND__COMMON_H__ */
+Index: head-2008-11-25/drivers/xen/scsiback/emulate.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsiback/emulate.c 2008-08-07 12:44:36.000000000 +0200
+@@ -0,0 +1,454 @@
++/*
++ * Xen SCSI backend driver
++ *
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <scsi/scsi.h>
++#include <scsi/scsi_cmnd.h>
++#include <scsi/scsi_device.h>
++#include "common.h"
++
++/* Following SCSI commands are not defined in scsi/scsi.h */
++#define EXTENDED_COPY 0x83 /* EXTENDED COPY command */
++#define REPORT_ALIASES 0xa3 /* REPORT ALIASES command */
++#define CHANGE_ALIASES 0xa4 /* CHANGE ALIASES command */
++#define SET_PRIORITY 0xa4 /* SET PRIORITY command */
++
++
++/*
++ The bitmap in order to control emulation.
++ (Bit 3 to 7 are reserved for future use.)
++*/
++#define VSCSIIF_NEED_CMD_EXEC 0x01 /* If this bit is set, cmd exec */
++ /* is required. */
++#define VSCSIIF_NEED_EMULATE_REQBUF 0x02 /* If this bit is set, need */
++ /* emulation reqest buff before */
++ /* cmd exec. */
++#define VSCSIIF_NEED_EMULATE_RSPBUF 0x04 /* If this bit is set, need */
++ /* emulation resp buff after */
++ /* cmd exec. */
++
++/* Additional Sense Code (ASC) used */
++#define NO_ADDITIONAL_SENSE 0x0
++#define LOGICAL_UNIT_NOT_READY 0x4
++#define UNRECOVERED_READ_ERR 0x11
++#define PARAMETER_LIST_LENGTH_ERR 0x1a
++#define INVALID_OPCODE 0x20
++#define ADDR_OUT_OF_RANGE 0x21
++#define INVALID_FIELD_IN_CDB 0x24
++#define INVALID_FIELD_IN_PARAM_LIST 0x26
++#define POWERON_RESET 0x29
++#define SAVING_PARAMS_UNSUP 0x39
++#define THRESHOLD_EXCEEDED 0x5d
++#define LOW_POWER_COND_ON 0x5e
++
++
++
++/* Number os SCSI op_code */
++#define VSCSI_MAX_SCSI_OP_CODE 256
++static unsigned char bitmap[VSCSI_MAX_SCSI_OP_CODE];
++
++
++
++/*
++ Emulation routines for each SCSI op_code.
++*/
++static void (*pre_function[VSCSI_MAX_SCSI_OP_CODE])(pending_req_t *, void *);
++static void (*post_function[VSCSI_MAX_SCSI_OP_CODE])(pending_req_t *, void *);
++
++
++static const int check_condition_result =
++ (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
++
++static void scsiback_mk_sense_buffer(uint8_t *data, uint8_t key,
++ uint8_t asc, uint8_t asq)
++{
++ data[0] = 0x70; /* fixed, current */
++ data[2] = key;
++ data[7] = 0xa; /* implies 18 byte sense buffer */
++ data[12] = asc;
++ data[13] = asq;
++}
++
++static void resp_not_supported_cmd(pending_req_t *pending_req, void *data)
++{
++ scsiback_mk_sense_buffer(pending_req->sense_buffer, ILLEGAL_REQUEST,
++ INVALID_OPCODE, 0);
++ pending_req->resid = 0;
++ pending_req->rslt = check_condition_result;
++}
++
++
++static int __copy_to_sg(struct scatterlist *sg, unsigned int nr_sg,
++ void *buf, unsigned int buflen)
++{
++ void *from = buf;
++ void *to;
++ unsigned int from_rest = buflen;
++ unsigned int to_capa;
++ unsigned int copy_size = 0;
++ unsigned int i;
++ unsigned long pfn;
++
++ for (i = 0; i < nr_sg; i++) {
++ if (sg->page == NULL) {
++ printk(KERN_WARNING "%s: inconsistent length field in "
++ "scatterlist\n", __FUNCTION__);
++ return -ENOMEM;
++ }
++
++ to_capa = sg->length;
++ copy_size = min_t(unsigned int, to_capa, from_rest);
++
++ pfn = page_to_pfn(sg->page);
++ to = pfn_to_kaddr(pfn) + (sg->offset);
++ memcpy(to, from, copy_size);
++
++ from_rest -= copy_size;
++ if (from_rest == 0) {
++ return 0;
++ }
++
++ sg++;
++ from += copy_size;
++ }
++
++ printk(KERN_WARNING "%s: no space in scatterlist\n",
++ __FUNCTION__);
++ return -ENOMEM;
++}
++
++static int __copy_from_sg(struct scatterlist *sg, unsigned int nr_sg,
++ void *buf, unsigned int buflen)
++{
++ void *from;
++ void *to = buf;
++ unsigned int from_rest;
++ unsigned int to_capa = buflen;
++ unsigned int copy_size;
++ unsigned int i;
++ unsigned long pfn;
++
++ for (i = 0; i < nr_sg; i++) {
++ if (sg->page == NULL) {
++ printk(KERN_WARNING "%s: inconsistent length field in "
++ "scatterlist\n", __FUNCTION__);
++ return -ENOMEM;
++ }
++
++ from_rest = sg->length;
++ if ((from_rest > 0) && (to_capa < from_rest)) {
++ printk(KERN_WARNING
++ "%s: no space in destination buffer\n",
++ __FUNCTION__);
++ return -ENOMEM;
++ }
++ copy_size = from_rest;
++
++ pfn = page_to_pfn(sg->page);
++ from = pfn_to_kaddr(pfn) + (sg->offset);
++ memcpy(to, from, copy_size);
++
++ to_capa -= copy_size;
++
++ sg++;
++ to += copy_size;
++ }
++
++ return 0;
++}
++
++static int __nr_luns_under_host(struct vscsibk_info *info)
++{
++ struct v2p_entry *entry;
++ struct list_head *head = &(info->v2p_entry_lists);
++ unsigned long flags;
++ int lun_cnt = 0;
++
++ spin_lock_irqsave(&info->v2p_lock, flags);
++ list_for_each_entry(entry, head, l) {
++ lun_cnt++;
++ }
++ spin_unlock_irqrestore(&info->v2p_lock, flags);
++
++ return (lun_cnt);
++}
++
++
++/* REPORT LUNS Define*/
++#define VSCSI_REPORT_LUNS_HEADER 8
++#define VSCSI_REPORT_LUNS_RETRY 3
++
++/* quoted scsi_debug.c/resp_report_luns() */
++static void __report_luns(pending_req_t *pending_req, void *data)
++{
++ struct vscsibk_info *info = pending_req->info;
++ unsigned int channel = pending_req->sdev->channel;
++ unsigned int target = pending_req->sdev->id;
++ unsigned int nr_seg = pending_req->nr_segments;
++ unsigned char *cmd = (unsigned char *)pending_req->cmnd;
++
++ unsigned char *buff = NULL;
++ unsigned char alloc_len;
++ unsigned int alloc_luns = 0;
++ unsigned int req_bufflen = 0;
++ unsigned int actual_len = 0;
++ unsigned int retry_cnt = 0;
++ int select_report = (int)cmd[2];
++ int i, lun_cnt = 0, lun, upper, err = 0;
++
++ struct v2p_entry *entry;
++ struct list_head *head = &(info->v2p_entry_lists);
++ unsigned long flags;
++
++ struct scsi_lun *one_lun;
++
++ req_bufflen = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
++ if ((req_bufflen < 4) || (select_report != 0))
++ goto fail;
++
++ alloc_luns = __nr_luns_under_host(info);
++ alloc_len = sizeof(struct scsi_lun) * alloc_luns
++ + VSCSI_REPORT_LUNS_HEADER;
++retry:
++ if ((buff = kmalloc(alloc_len, GFP_KERNEL)) == NULL) {
++ printk(KERN_ERR "scsiback:%s kmalloc err\n", __FUNCTION__);
++ goto fail;
++ }
++
++ memset(buff, 0, alloc_len);
++
++ one_lun = (struct scsi_lun *) &buff[8];
++ spin_lock_irqsave(&info->v2p_lock, flags);
++ list_for_each_entry(entry, head, l) {
++ if ((entry->v.chn == channel) &&
++ (entry->v.tgt == target)) {
++
++ /* check overflow */
++ if (lun_cnt >= alloc_luns) {
++ spin_unlock_irqrestore(&info->v2p_lock,
++ flags);
++
++ if (retry_cnt < VSCSI_REPORT_LUNS_RETRY) {
++ retry_cnt++;
++ if (buff)
++ kfree(buff);
++ goto retry;
++ }
++
++ goto fail;
++ }
++
++ lun = entry->v.lun;
++ upper = (lun >> 8) & 0x3f;
++ if (upper)
++ one_lun[lun_cnt].scsi_lun[0] = upper;
++ one_lun[lun_cnt].scsi_lun[1] = lun & 0xff;
++ lun_cnt++;
++ }
++ }
++
++ spin_unlock_irqrestore(&info->v2p_lock, flags);
++
++ buff[2] = ((sizeof(struct scsi_lun) * lun_cnt) >> 8) & 0xff;
++ buff[3] = (sizeof(struct scsi_lun) * lun_cnt) & 0xff;
++
++ actual_len = lun_cnt * sizeof(struct scsi_lun)
++ + VSCSI_REPORT_LUNS_HEADER;
++ req_bufflen = 0;
++ for (i = 0; i < nr_seg; i++)
++ req_bufflen += pending_req->sgl[i].length;
++
++ err = __copy_to_sg(pending_req->sgl, nr_seg, buff,
++ min(req_bufflen, actual_len));
++ if (err)
++ goto fail;
++
++ memset(pending_req->sense_buffer, 0, VSCSIIF_SENSE_BUFFERSIZE);
++ pending_req->rslt = 0x00;
++ pending_req->resid = req_bufflen - min(req_bufflen, actual_len);
++
++ kfree(buff);
++ return;
++
++fail:
++ scsiback_mk_sense_buffer(pending_req->sense_buffer, ILLEGAL_REQUEST,
++ INVALID_FIELD_IN_CDB, 0);
++ pending_req->rslt = check_condition_result;
++ pending_req->resid = 0;
++ if (buff)
++ kfree(buff);
++ return;
++}
++
++
++
++int __pre_do_emulation(pending_req_t *pending_req, void *data)
++{
++ uint8_t op_code = pending_req->cmnd[0];
++
++ if ((bitmap[op_code] & VSCSIIF_NEED_EMULATE_REQBUF) &&
++ pre_function[op_code] != NULL) {
++ pre_function[op_code](pending_req, data);
++ }
++
++ /*
++ 0: no need for native driver call, so should return immediately.
++ 1: non emulation or should call native driver
++ after modifing the request buffer.
++ */
++ return !!(bitmap[op_code] & VSCSIIF_NEED_CMD_EXEC);
++}
++
++void scsiback_rsp_emulation(pending_req_t *pending_req)
++{
++ uint8_t op_code = pending_req->cmnd[0];
++
++ if ((bitmap[op_code] & VSCSIIF_NEED_EMULATE_RSPBUF) &&
++ post_function[op_code] != NULL) {
++ post_function[op_code](pending_req, NULL);
++ }
++
++ return;
++}
++
++
++void scsiback_req_emulation_or_cmdexec(pending_req_t *pending_req)
++{
++ if (__pre_do_emulation(pending_req, NULL)) {
++ scsiback_cmd_exec(pending_req);
++ }
++ else {
++ scsiback_fast_flush_area(pending_req);
++ scsiback_do_resp_with_sense(pending_req->sense_buffer,
++ pending_req->rslt, pending_req->resid, pending_req);
++ }
++}
++
++
++/*
++ Following are not customizable functions.
++*/
++void scsiback_emulation_init(void)
++{
++ int i;
++
++ /* Initialize to default state */
++ for (i = 0; i < VSCSI_MAX_SCSI_OP_CODE; i++) {
++ bitmap[i] = (VSCSIIF_NEED_EMULATE_REQBUF |
++ VSCSIIF_NEED_EMULATE_RSPBUF);
++ pre_function[i] = resp_not_supported_cmd;
++ post_function[i] = NULL;
++ /* means,
++ - no need for pre-emulation
++ - no need for post-emulation
++ - call native driver
++ */
++ }
++
++ /*
++ Register appropriate functions below as you need.
++ (See scsi/scsi.h for definition of SCSI op_code.)
++ */
++
++ /*
++ This command is Non emulation.
++ */
++ bitmap[TEST_UNIT_READY] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[TEST_UNIT_READY] = NULL;
++ post_function[TEST_UNIT_READY] = NULL;
++
++ bitmap[REZERO_UNIT] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[REZERO_UNIT] = NULL;
++ post_function[REZERO_UNIT] = NULL;
++
++ bitmap[REQUEST_SENSE] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[REQUEST_SENSE] = NULL;
++ post_function[REQUEST_SENSE] = NULL;
++
++ bitmap[FORMAT_UNIT] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[FORMAT_UNIT] = NULL;
++ post_function[FORMAT_UNIT] = NULL;
++
++ bitmap[READ_BLOCK_LIMITS] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[READ_BLOCK_LIMITS] = NULL;
++ post_function[READ_BLOCK_LIMITS] = NULL;
++
++ bitmap[READ_6] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[READ_6] = NULL;
++ post_function[READ_6] = NULL;
++
++ bitmap[WRITE_6] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[WRITE_6] = NULL;
++ post_function[WRITE_6] = NULL;
++
++ bitmap[WRITE_FILEMARKS] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[WRITE_FILEMARKS] = NULL;
++ post_function[WRITE_FILEMARKS] = NULL;
++
++ bitmap[SPACE] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[SPACE] = NULL;
++ post_function[SPACE] = NULL;
++
++ bitmap[INQUIRY] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[INQUIRY] = NULL;
++ post_function[INQUIRY] = NULL;
++
++ bitmap[ERASE] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[ERASE] = NULL;
++ post_function[ERASE] = NULL;
++
++ bitmap[MODE_SENSE] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[MODE_SENSE] = NULL;
++ post_function[MODE_SENSE] = NULL;
++
++ bitmap[SEND_DIAGNOSTIC] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[SEND_DIAGNOSTIC] = NULL;
++ post_function[SEND_DIAGNOSTIC] = NULL;
++
++ bitmap[READ_CAPACITY] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[READ_CAPACITY] = NULL;
++ post_function[READ_CAPACITY] = NULL;
++
++ bitmap[READ_10] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[READ_10] = NULL;
++ post_function[READ_10] = NULL;
++
++ bitmap[WRITE_10] = VSCSIIF_NEED_CMD_EXEC;
++ pre_function[WRITE_10] = NULL;
++ post_function[WRITE_10] = NULL;
++
++ /*
++ This command is Full emulation.
++ */
++ pre_function[REPORT_LUNS] = __report_luns;
++ bitmap[REPORT_LUNS] = (VSCSIIF_NEED_EMULATE_REQBUF |
++ VSCSIIF_NEED_EMULATE_RSPBUF);
++
++ return;
++}
+Index: head-2008-11-25/drivers/xen/scsiback/interface.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsiback/interface.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,182 @@
++/*
++ * interface management.
++ *
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * Based on the blkback driver code.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <scsi/scsi.h>
++#include <scsi/scsi_host.h>
++#include <scsi/scsi_device.h>
++#include "common.h"
++
++#include <xen/evtchn.h>
++#include <linux/kthread.h>
++
++
++static kmem_cache_t *scsiback_cachep;
++
++struct vscsibk_info *vscsibk_info_alloc(domid_t domid)
++{
++ struct vscsibk_info *info;
++
++ info = kmem_cache_alloc(scsiback_cachep, GFP_KERNEL);
++ if (!info)
++ return ERR_PTR(-ENOMEM);
++
++ memset(info, 0, sizeof(*info));
++ info->domid = domid;
++ spin_lock_init(&info->ring_lock);
++ atomic_set(&info->nr_unreplied_reqs, 0);
++ init_waitqueue_head(&info->wq);
++ init_waitqueue_head(&info->waiting_to_free);
++
++ return info;
++}
++
++static int map_frontend_page( struct vscsibk_info *info,
++ unsigned long ring_ref)
++{
++ struct gnttab_map_grant_ref op;
++ int err;
++
++ gnttab_set_map_op(&op, (unsigned long)info->ring_area->addr,
++ GNTMAP_host_map, ring_ref,
++ info->domid);
++
++ err = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1);
++ BUG_ON(err);
++
++ if (op.status) {
++ printk(KERN_ERR "scsiback: Grant table operation failure !\n");
++ return op.status;
++ }
++
++ info->shmem_ref = ring_ref;
++ info->shmem_handle = op.handle;
++
++ return (GNTST_okay);
++}
++
++static void unmap_frontend_page(struct vscsibk_info *info)
++{
++ struct gnttab_unmap_grant_ref op;
++ int err;
++
++ gnttab_set_unmap_op(&op, (unsigned long)info->ring_area->addr,
++ GNTMAP_host_map, info->shmem_handle);
++
++ err = HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1);
++ BUG_ON(err);
++
++}
++
++int scsiback_init_sring(struct vscsibk_info *info,
++ unsigned long ring_ref, unsigned int evtchn)
++{
++ struct vscsiif_sring *sring;
++ int err;
++
++ if (info->irq) {
++ printk(KERN_ERR "scsiback: Already connected through?\n");
++ return -1;
++ }
++
++ info->ring_area = alloc_vm_area(PAGE_SIZE);
++ if (!info)
++ return -ENOMEM;
++
++ err = map_frontend_page(info, ring_ref);
++ if (err)
++ goto free_vm;
++
++ sring = (struct vscsiif_sring *) info->ring_area->addr;
++ BACK_RING_INIT(&info->ring, sring, PAGE_SIZE);
++
++ err = bind_interdomain_evtchn_to_irqhandler(
++ info->domid, evtchn,
++ scsiback_intr, 0, "vscsiif-backend", info);
++
++ if (err < 0)
++ goto unmap_page;
++
++ info->irq = err;
++
++ return 0;
++
++unmap_page:
++ unmap_frontend_page(info);
++free_vm:
++ free_vm_area(info->ring_area);
++
++ return err;
++}
++
++void scsiback_disconnect(struct vscsibk_info *info)
++{
++ if (info->kthread) {
++ kthread_stop(info->kthread);
++ info->kthread = NULL;
++ }
++
++ wait_event(info->waiting_to_free,
++ atomic_read(&info->nr_unreplied_reqs) == 0);
++
++ if (info->irq) {
++ unbind_from_irqhandler(info->irq, info);
++ info->irq = 0;
++ }
++
++ if (info->ring.sring) {
++ unmap_frontend_page(info);
++ free_vm_area(info->ring_area);
++ info->ring.sring = NULL;
++ }
++}
++
++void scsiback_free(struct vscsibk_info *info)
++{
++ kmem_cache_free(scsiback_cachep, info);
++}
++
++int __init scsiback_interface_init(void)
++{
++ scsiback_cachep = kmem_cache_create("vscsiif_cache",
++ sizeof(struct vscsibk_info), 0, 0, NULL, NULL);
++ if (!scsiback_cachep) {
++ printk(KERN_ERR "scsiback: can't init scsi cache\n");
++ return -ENOMEM;
++ }
++
++ return 0;
++}
++
++void scsiback_interface_exit(void)
++{
++ kmem_cache_destroy(scsiback_cachep);
++}
+Index: head-2008-11-25/drivers/xen/scsiback/scsiback.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsiback/scsiback.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,717 @@
++/*
++ * Xen SCSI backend driver
++ *
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * Based on the blkback driver code.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/spinlock.h>
++#include <linux/kthread.h>
++#include <linux/list.h>
++#include <linux/delay.h>
++#include <xen/balloon.h>
++#include <asm/hypervisor.h>
++#include <scsi/scsi.h>
++#include <scsi/scsi_cmnd.h>
++#include <scsi/scsi_host.h>
++#include <scsi/scsi_device.h>
++#include <scsi/scsi_dbg.h>
++#include <scsi/scsi_eh.h>
++
++#include "common.h"
++
++
++struct list_head pending_free;
++DEFINE_SPINLOCK(pending_free_lock);
++DECLARE_WAIT_QUEUE_HEAD(pending_free_wq);
++
++int vscsiif_reqs = VSCSIIF_BACK_MAX_PENDING_REQS;
++module_param_named(reqs, vscsiif_reqs, int, 0);
++MODULE_PARM_DESC(reqs, "Number of scsiback requests to allocate");
++
++static unsigned int log_print_stat = 0;
++module_param(log_print_stat, int, 0644);
++
++#define SCSIBACK_INVALID_HANDLE (~0)
++
++static pending_req_t *pending_reqs;
++static struct page **pending_pages;
++static grant_handle_t *pending_grant_handles;
++
++static int vaddr_pagenr(pending_req_t *req, int seg)
++{
++ return (req - pending_reqs) * VSCSIIF_SG_TABLESIZE + seg;
++}
++
++static unsigned long vaddr(pending_req_t *req, int seg)
++{
++ unsigned long pfn = page_to_pfn(pending_pages[vaddr_pagenr(req, seg)]);
++ return (unsigned long)pfn_to_kaddr(pfn);
++}
++
++#define pending_handle(_req, _seg) \
++ (pending_grant_handles[vaddr_pagenr(_req, _seg)])
++
++
++void scsiback_fast_flush_area(pending_req_t *req)
++{
++ struct gnttab_unmap_grant_ref unmap[VSCSIIF_SG_TABLESIZE];
++ unsigned int i, invcount = 0;
++ grant_handle_t handle;
++ int err;
++
++ if (req->nr_segments) {
++ for (i = 0; i < req->nr_segments; i++) {
++ handle = pending_handle(req, i);
++ if (handle == SCSIBACK_INVALID_HANDLE)
++ continue;
++ gnttab_set_unmap_op(&unmap[i], vaddr(req, i),
++ GNTMAP_host_map, handle);
++ pending_handle(req, i) = SCSIBACK_INVALID_HANDLE;
++ invcount++;
++ }
++
++ err = HYPERVISOR_grant_table_op(
++ GNTTABOP_unmap_grant_ref, unmap, invcount);
++ BUG_ON(err);
++ kfree(req->sgl);
++ }
++
++ return;
++}
++
++
++static pending_req_t * alloc_req(struct vscsibk_info *info)
++{
++ pending_req_t *req = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&pending_free_lock, flags);
++ if (!list_empty(&pending_free)) {
++ req = list_entry(pending_free.next, pending_req_t, free_list);
++ list_del(&req->free_list);
++ }
++ spin_unlock_irqrestore(&pending_free_lock, flags);
++ return req;
++}
++
++
++static void free_req(pending_req_t *req)
++{
++ unsigned long flags;
++ int was_empty;
++
++ spin_lock_irqsave(&pending_free_lock, flags);
++ was_empty = list_empty(&pending_free);
++ list_add(&req->free_list, &pending_free);
++ spin_unlock_irqrestore(&pending_free_lock, flags);
++ if (was_empty)
++ wake_up(&pending_free_wq);
++}
++
++
++static void scsiback_notify_work(struct vscsibk_info *info)
++{
++ info->waiting_reqs = 1;
++ wake_up(&info->wq);
++}
++
++void scsiback_do_resp_with_sense(char *sense_buffer, int32_t result,
++ uint32_t resid, pending_req_t *pending_req)
++{
++ vscsiif_response_t *ring_res;
++ struct vscsibk_info *info = pending_req->info;
++ int notify;
++ int more_to_do = 1;
++ unsigned long flags;
++
++ DPRINTK("%s\n",__FUNCTION__);
++
++ spin_lock_irqsave(&info->ring_lock, flags);
++
++ ring_res = RING_GET_RESPONSE(&info->ring, info->ring.rsp_prod_pvt);
++ info->ring.rsp_prod_pvt++;
++
++ ring_res->rslt = result;
++ ring_res->rqid = pending_req->rqid;
++
++ if (sense_buffer != NULL) {
++ memcpy(ring_res->sense_buffer, sense_buffer,
++ VSCSIIF_SENSE_BUFFERSIZE);
++ ring_res->sense_len = VSCSIIF_SENSE_BUFFERSIZE;
++ } else {
++ ring_res->sense_len = 0;
++ }
++
++ ring_res->residual_len = resid;
++
++ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&info->ring, notify);
++ if (info->ring.rsp_prod_pvt == info->ring.req_cons) {
++ RING_FINAL_CHECK_FOR_REQUESTS(&info->ring, more_to_do);
++ } else if (RING_HAS_UNCONSUMED_REQUESTS(&info->ring)) {
++ more_to_do = 1;
++ }
++
++ spin_unlock_irqrestore(&info->ring_lock, flags);
++
++ if (more_to_do)
++ scsiback_notify_work(info);
++
++ if (notify)
++ notify_remote_via_irq(info->irq);
++
++ free_req(pending_req);
++}
++
++static void scsiback_print_status(char *sense_buffer, int errors,
++ pending_req_t *pending_req)
++{
++ struct scsi_device *sdev = pending_req->sdev;
++
++ printk(KERN_ERR "scsiback: %d:%d:%d:%d ",sdev->host->host_no,
++ sdev->channel, sdev->id, sdev->lun);
++ printk(KERN_ERR "status = 0x%02x, message = 0x%02x, host = 0x%02x, driver = 0x%02x\n",
++ status_byte(errors), msg_byte(errors),
++ host_byte(errors), driver_byte(errors));
++
++ printk(KERN_ERR "scsiback: cmnd[0]=0x%02X\n",
++ pending_req->cmnd[0]);
++
++ if (CHECK_CONDITION & status_byte(errors))
++ __scsi_print_sense("scsiback", sense_buffer, SCSI_SENSE_BUFFERSIZE);
++}
++
++
++static void scsiback_cmd_done(struct request *req, int errors)
++{
++ pending_req_t *pending_req = req->end_io_data;
++ unsigned char *sense_buffer;
++ unsigned int resid;
++
++ sense_buffer = req->sense;
++ resid = req->data_len;
++
++ if (errors != 0) {
++ if (log_print_stat)
++ scsiback_print_status(sense_buffer, errors, pending_req);
++ }
++
++ scsiback_rsp_emulation(pending_req);
++
++ scsiback_fast_flush_area(pending_req);
++ scsiback_do_resp_with_sense(sense_buffer, errors, resid, pending_req);
++ scsiback_put(pending_req->info);
++
++ __blk_put_request(req->q, req);
++}
++
++
++static int scsiback_gnttab_data_map(vscsiif_request_t *ring_req,
++ pending_req_t *pending_req)
++{
++ u32 flags;
++ int write;
++ int i, err = 0;
++ unsigned int data_len = 0;
++ struct gnttab_map_grant_ref map[VSCSIIF_SG_TABLESIZE];
++ struct vscsibk_info *info = pending_req->info;
++
++ int data_dir = (int)pending_req->sc_data_direction;
++ unsigned int nr_segments = (unsigned int)pending_req->nr_segments;
++
++ write = (data_dir == DMA_TO_DEVICE);
++
++ if (nr_segments) {
++ /* free of (sgl) in fast_flush_area()*/
++ pending_req->sgl = kmalloc(sizeof(struct scatterlist) * nr_segments,
++ GFP_KERNEL);
++ if (!pending_req->sgl) {
++ printk(KERN_ERR "scsiback: %s: kmalloc() error.\n", __FUNCTION__);
++ return -ENOMEM;
++ }
++
++ for (i = 0; i < nr_segments; i++) {
++ flags = GNTMAP_host_map;
++ if (write)
++ flags |= GNTMAP_readonly;
++ gnttab_set_map_op(&map[i], vaddr(pending_req, i), flags,
++ ring_req->seg[i].gref,
++ info->domid);
++ }
++
++ err = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map, nr_segments);
++ BUG_ON(err);
++
++ for (i = 0; i < nr_segments; i++) {
++ if (unlikely(map[i].status != 0)) {
++ printk(KERN_ERR "scsiback: invalid buffer -- could not remap it\n");
++ map[i].handle = SCSIBACK_INVALID_HANDLE;
++ err |= 1;
++ }
++
++ pending_handle(pending_req, i) = map[i].handle;
++
++ if (err)
++ continue;
++
++ set_phys_to_machine(__pa(vaddr(
++ pending_req, i)) >> PAGE_SHIFT,
++ FOREIGN_FRAME(map[i].dev_bus_addr >> PAGE_SHIFT));
++
++ pending_req->sgl[i].page = virt_to_page(vaddr(pending_req, i));
++ pending_req->sgl[i].offset = ring_req->seg[i].offset;
++ pending_req->sgl[i].length = ring_req->seg[i].length;
++ data_len += pending_req->sgl[i].length;
++
++ barrier();
++ if (pending_req->sgl[i].offset >= PAGE_SIZE ||
++ pending_req->sgl[i].length > PAGE_SIZE ||
++ pending_req->sgl[i].offset + pending_req->sgl[i].length > PAGE_SIZE)
++ err |= 1;
++
++ }
++
++ if (err)
++ goto fail_flush;
++ }
++
++ pending_req->request_bufflen = data_len;
++
++ return 0;
++
++fail_flush:
++ scsiback_fast_flush_area(pending_req);
++ return -ENOMEM;
++}
++
++/* quoted scsi_lib.c/scsi_merge_bio */
++static int scsiback_merge_bio(struct request *rq, struct bio *bio)
++{
++ struct request_queue *q = rq->q;
++
++ bio->bi_flags &= ~(1 << BIO_SEG_VALID);
++ if (rq_data_dir(rq) == WRITE)
++ bio->bi_rw |= (1 << BIO_RW);
++
++ blk_queue_bounce(q, &bio);
++
++ if (!rq->bio)
++ blk_rq_bio_prep(q, rq, bio);
++ else if (!q->back_merge_fn(q, rq, bio))
++ return -EINVAL;
++ else {
++ rq->biotail->bi_next = bio;
++ rq->biotail = bio;
++ rq->hard_nr_sectors += bio_sectors(bio);
++ rq->nr_sectors = rq->hard_nr_sectors;
++ }
++
++ return 0;
++}
++
++
++/* quoted scsi_lib.c/scsi_bi_endio */
++static int scsiback_bi_endio(struct bio *bio, unsigned int bytes_done, int error)
++{
++ if (bio->bi_size)
++ return 1;
++
++ bio_put(bio);
++ return 0;
++}
++
++
++
++/* quoted scsi_lib.c/scsi_req_map_sg . */
++static int request_map_sg(struct request *rq, pending_req_t *pending_req, unsigned int count)
++{
++ struct request_queue *q = rq->q;
++ int nr_pages;
++ unsigned int nsegs = count;
++
++ unsigned int data_len = 0, len, bytes, off;
++ struct page *page;
++ struct bio *bio = NULL;
++ int i, err, nr_vecs = 0;
++
++ for (i = 0; i < nsegs; i++) {
++ page = pending_req->sgl[i].page;
++ off = (unsigned int)pending_req->sgl[i].offset;
++ len = (unsigned int)pending_req->sgl[i].length;
++ data_len += len;
++
++ nr_pages = (len + off + PAGE_SIZE - 1) >> PAGE_SHIFT;
++ while (len > 0) {
++ bytes = min_t(unsigned int, len, PAGE_SIZE - off);
++
++ if (!bio) {
++ nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages);
++ nr_pages -= nr_vecs;
++ bio = bio_alloc(GFP_KERNEL, nr_vecs);
++ if (!bio) {
++ err = -ENOMEM;
++ goto free_bios;
++ }
++ bio->bi_end_io = scsiback_bi_endio;
++ }
++
++ if (bio_add_pc_page(q, bio, page, bytes, off) !=
++ bytes) {
++ bio_put(bio);
++ err = -EINVAL;
++ goto free_bios;
++ }
++
++ if (bio->bi_vcnt >= nr_vecs) {
++ err = scsiback_merge_bio(rq, bio);
++ if (err) {
++ bio_endio(bio, bio->bi_size, 0);
++ goto free_bios;
++ }
++ bio = NULL;
++ }
++
++ page++;
++ len -= bytes;
++ off = 0;
++ }
++ }
++
++ rq->buffer = rq->data = NULL;
++ rq->data_len = data_len;
++
++ return 0;
++
++free_bios:
++ while ((bio = rq->bio) != NULL) {
++ rq->bio = bio->bi_next;
++ /*
++ * call endio instead of bio_put incase it was bounced
++ */
++ bio_endio(bio, bio->bi_size, 0);
++ }
++
++ return err;
++}
++
++
++void scsiback_cmd_exec(pending_req_t *pending_req)
++{
++ int cmd_len = (int)pending_req->cmd_len;
++ int data_dir = (int)pending_req->sc_data_direction;
++ unsigned int nr_segments = (unsigned int)pending_req->nr_segments;
++ unsigned int timeout;
++ struct request *rq;
++ int write;
++
++ DPRINTK("%s\n",__FUNCTION__);
++
++ /* because it doesn't timeout backend earlier than frontend.*/
++ if (pending_req->timeout_per_command)
++ timeout = pending_req->timeout_per_command * HZ;
++ else
++ timeout = VSCSIIF_TIMEOUT;
++
++ write = (data_dir == DMA_TO_DEVICE);
++ rq = blk_get_request(pending_req->sdev->request_queue, write, GFP_KERNEL);
++
++ rq->flags |= REQ_BLOCK_PC;
++ rq->cmd_len = cmd_len;
++ memcpy(rq->cmd, pending_req->cmnd, cmd_len);
++
++ memset(pending_req->sense_buffer, 0, VSCSIIF_SENSE_BUFFERSIZE);
++ rq->sense = pending_req->sense_buffer;
++ rq->sense_len = 0;
++
++ /* not allowed to retry in backend. */
++ rq->retries = 0;
++ rq->timeout = timeout;
++ rq->end_io_data = pending_req;
++
++ if (nr_segments) {
++
++ if (request_map_sg(rq, pending_req, nr_segments)) {
++ printk(KERN_ERR "scsiback: SG Request Map Error\n");
++ return;
++ }
++ }
++
++ scsiback_get(pending_req->info);
++ blk_execute_rq_nowait(rq->q, NULL, rq, 1, scsiback_cmd_done);
++
++ return ;
++}
++
++
++static void scsiback_device_reset_exec(pending_req_t *pending_req)
++{
++ struct vscsibk_info *info = pending_req->info;
++ int err;
++ struct scsi_device *sdev = pending_req->sdev;
++
++ scsiback_get(info);
++ err = scsi_reset_provider(sdev, SCSI_TRY_RESET_DEVICE);
++
++ scsiback_do_resp_with_sense(NULL, err, 0, pending_req);
++ scsiback_put(info);
++
++ return;
++}
++
++
++irqreturn_t scsiback_intr(int irq, void *dev_id, struct pt_regs *regs)
++{
++ scsiback_notify_work((struct vscsibk_info *)dev_id);
++ return IRQ_HANDLED;
++}
++
++static int prepare_pending_reqs(struct vscsibk_info *info,
++ vscsiif_request_t *ring_req, pending_req_t *pending_req)
++{
++ struct scsi_device *sdev;
++ struct ids_tuple vir;
++ int err = -EINVAL;
++
++ DPRINTK("%s\n",__FUNCTION__);
++
++ pending_req->rqid = ring_req->rqid;
++ pending_req->act = ring_req->act;
++
++ pending_req->info = info;
++
++ vir.chn = ring_req->channel;
++ vir.tgt = ring_req->id;
++ vir.lun = ring_req->lun;
++
++ rmb();
++ sdev = scsiback_do_translation(info, &vir);
++ if (!sdev) {
++ pending_req->sdev = NULL;
++ DPRINTK("scsiback: doesn't exist.\n");
++ err = -ENODEV;
++ goto invalid_value;
++ }
++ pending_req->sdev = sdev;
++
++ /* request range check from frontend */
++ pending_req->sc_data_direction = ring_req->sc_data_direction;
++ barrier();
++ if ((pending_req->sc_data_direction != DMA_BIDIRECTIONAL) &&
++ (pending_req->sc_data_direction != DMA_TO_DEVICE) &&
++ (pending_req->sc_data_direction != DMA_FROM_DEVICE) &&
++ (pending_req->sc_data_direction != DMA_NONE)) {
++ DPRINTK("scsiback: invalid parameter data_dir = %d\n",
++ pending_req->sc_data_direction);
++ err = -EINVAL;
++ goto invalid_value;
++ }
++
++ pending_req->nr_segments = ring_req->nr_segments;
++ barrier();
++ if (pending_req->nr_segments > VSCSIIF_SG_TABLESIZE) {
++ DPRINTK("scsiback: invalid parameter nr_seg = %d\n",
++ pending_req->nr_segments);
++ err = -EINVAL;
++ goto invalid_value;
++ }
++
++ pending_req->cmd_len = ring_req->cmd_len;
++ barrier();
++ if (pending_req->cmd_len > VSCSIIF_MAX_COMMAND_SIZE) {
++ DPRINTK("scsiback: invalid parameter cmd_len = %d\n",
++ pending_req->cmd_len);
++ err = -EINVAL;
++ goto invalid_value;
++ }
++ memcpy(pending_req->cmnd, ring_req->cmnd, pending_req->cmd_len);
++
++ pending_req->timeout_per_command = ring_req->timeout_per_command;
++
++ if(scsiback_gnttab_data_map(ring_req, pending_req)) {
++ DPRINTK("scsiback: invalid buffer\n");
++ err = -EINVAL;
++ goto invalid_value;
++ }
++
++ return 0;
++
++invalid_value:
++ return err;
++}
++
++
++static int scsiback_do_cmd_fn(struct vscsibk_info *info)
++{
++ struct vscsiif_back_ring *ring = &info->ring;
++ vscsiif_request_t *ring_req;
++
++ pending_req_t *pending_req;
++ RING_IDX rc, rp;
++ int err, more_to_do = 0;
++
++ DPRINTK("%s\n",__FUNCTION__);
++
++ rc = ring->req_cons;
++ rp = ring->sring->req_prod;
++ rmb();
++
++ while ((rc != rp)) {
++ if (RING_REQUEST_CONS_OVERFLOW(ring, rc))
++ break;
++ pending_req = alloc_req(info);
++ if (NULL == pending_req) {
++ more_to_do = 1;
++ break;
++ }
++
++ ring_req = RING_GET_REQUEST(ring, rc);
++ ring->req_cons = ++rc;
++
++ err = prepare_pending_reqs(info, ring_req,
++ pending_req);
++ if (err == -EINVAL) {
++ scsiback_do_resp_with_sense(NULL, (DRIVER_ERROR << 24),
++ 0, pending_req);
++ continue;
++ } else if (err == -ENODEV) {
++ scsiback_do_resp_with_sense(NULL, (DID_NO_CONNECT << 16),
++ 0, pending_req);
++ continue;
++ }
++
++ if (pending_req->act == VSCSIIF_ACT_SCSI_CDB) {
++ scsiback_req_emulation_or_cmdexec(pending_req);
++ } else if (pending_req->act == VSCSIIF_ACT_SCSI_RESET) {
++ scsiback_device_reset_exec(pending_req);
++ } else {
++ printk(KERN_ERR "scsiback: invalid parameter for request\n");
++ scsiback_do_resp_with_sense(NULL, (DRIVER_ERROR << 24),
++ 0, pending_req);
++ continue;
++ }
++ }
++
++ if (RING_HAS_UNCONSUMED_REQUESTS(ring))
++ more_to_do = 1;
++
++ /* Yield point for this unbounded loop. */
++ cond_resched();
++
++ return more_to_do;
++}
++
++
++int scsiback_schedule(void *data)
++{
++ struct vscsibk_info *info = (struct vscsibk_info *)data;
++
++ DPRINTK("%s\n",__FUNCTION__);
++
++ while (!kthread_should_stop()) {
++ wait_event_interruptible(
++ info->wq,
++ info->waiting_reqs || kthread_should_stop());
++ wait_event_interruptible(
++ pending_free_wq,
++ !list_empty(&pending_free) || kthread_should_stop());
++
++ info->waiting_reqs = 0;
++ smp_mb();
++
++ if (scsiback_do_cmd_fn(info))
++ info->waiting_reqs = 1;
++ }
++
++ return 0;
++}
++
++
++static int __init scsiback_init(void)
++{
++ int i, mmap_pages;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ mmap_pages = vscsiif_reqs * VSCSIIF_SG_TABLESIZE;
++
++ pending_reqs = kmalloc(sizeof(pending_reqs[0]) *
++ vscsiif_reqs, GFP_KERNEL);
++ pending_grant_handles = kmalloc(sizeof(pending_grant_handles[0]) *
++ mmap_pages, GFP_KERNEL);
++ pending_pages = alloc_empty_pages_and_pagevec(mmap_pages);
++
++ if (!pending_reqs || !pending_grant_handles || !pending_pages)
++ goto out_of_memory;
++
++ for (i = 0; i < mmap_pages; i++)
++ pending_grant_handles[i] = SCSIBACK_INVALID_HANDLE;
++
++ if (scsiback_interface_init() < 0)
++ goto out_of_kmem;
++
++ memset(pending_reqs, 0, sizeof(pending_reqs));
++ INIT_LIST_HEAD(&pending_free);
++
++ for (i = 0; i < vscsiif_reqs; i++)
++ list_add_tail(&pending_reqs[i].free_list, &pending_free);
++
++ if (scsiback_xenbus_init())
++ goto out_of_xenbus;
++
++ scsiback_emulation_init();
++
++ return 0;
++
++out_of_xenbus:
++ scsiback_xenbus_unregister();
++out_of_kmem:
++ scsiback_interface_exit();
++out_of_memory:
++ kfree(pending_reqs);
++ kfree(pending_grant_handles);
++ free_empty_pages_and_pagevec(pending_pages, mmap_pages);
++ printk(KERN_ERR "scsiback: %s: out of memory\n", __FUNCTION__);
++ return -ENOMEM;
++}
++
++static void __exit scsiback_exit(void)
++{
++ scsiback_xenbus_unregister();
++ scsiback_interface_exit();
++ kfree(pending_reqs);
++ kfree(pending_grant_handles);
++ free_empty_pages_and_pagevec(pending_pages, (vscsiif_reqs * VSCSIIF_SG_TABLESIZE));
++
++}
++
++module_init(scsiback_init);
++module_exit(scsiback_exit);
++
++MODULE_DESCRIPTION("Xen SCSI backend driver");
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/scsiback/translate.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsiback/translate.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,168 @@
++/*
++ * Xen SCSI backend driver
++ *
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/list.h>
++#include <linux/gfp.h>
++
++#include "common.h"
++
++/*
++ Initialize the translation entry list
++*/
++void scsiback_init_translation_table(struct vscsibk_info *info)
++{
++ INIT_LIST_HEAD(&info->v2p_entry_lists);
++ spin_lock_init(&info->v2p_lock);
++}
++
++
++/*
++ Add a new translation entry
++*/
++int scsiback_add_translation_entry(struct vscsibk_info *info,
++ struct scsi_device *sdev, struct ids_tuple *v)
++{
++ int err = 0;
++ struct v2p_entry *entry;
++ struct v2p_entry *new;
++ struct list_head *head = &(info->v2p_entry_lists);
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->v2p_lock, flags);
++
++ /* Check double assignment to identical virtual ID */
++ list_for_each_entry(entry, head, l) {
++ if ((entry->v.chn == v->chn) &&
++ (entry->v.tgt == v->tgt) &&
++ (entry->v.lun == v->lun)) {
++ printk(KERN_WARNING "scsiback: Virtual ID is already used. "
++ "Assignment was not performed.\n");
++ err = -EEXIST;
++ goto out;
++ }
++
++ }
++
++ /* Create a new translation entry and add to the list */
++ if ((new = kmalloc(sizeof(struct v2p_entry), GFP_ATOMIC)) == NULL) {
++ printk(KERN_ERR "scsiback: %s: kmalloc() error.\n", __FUNCTION__);
++ err = -ENOMEM;
++ goto out;
++ }
++ new->v = *v;
++ new->sdev = sdev;
++ list_add_tail(&new->l, head);
++
++out:
++ spin_unlock_irqrestore(&info->v2p_lock, flags);
++ return err;
++}
++
++
++/*
++ Delete the translation entry specfied
++*/
++int scsiback_del_translation_entry(struct vscsibk_info *info,
++ struct ids_tuple *v)
++{
++ struct v2p_entry *entry;
++ struct list_head *head = &(info->v2p_entry_lists);
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->v2p_lock, flags);
++ /* Find out the translation entry specified */
++ list_for_each_entry(entry, head, l) {
++ if ((entry->v.chn == v->chn) &&
++ (entry->v.tgt == v->tgt) &&
++ (entry->v.lun == v->lun)) {
++ goto found;
++ }
++ }
++
++ spin_unlock_irqrestore(&info->v2p_lock, flags);
++ return 1;
++
++found:
++ /* Delete the translation entry specfied */
++ scsi_device_put(entry->sdev);
++ list_del(&entry->l);
++ kfree(entry);
++
++ spin_unlock_irqrestore(&info->v2p_lock, flags);
++ return 0;
++}
++
++
++/*
++ Perform virtual to physical translation
++*/
++struct scsi_device *scsiback_do_translation(struct vscsibk_info *info,
++ struct ids_tuple *v)
++{
++ struct v2p_entry *entry;
++ struct list_head *head = &(info->v2p_entry_lists);
++ struct scsi_device *sdev = NULL;
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->v2p_lock, flags);
++ list_for_each_entry(entry, head, l) {
++ if ((entry->v.chn == v->chn) &&
++ (entry->v.tgt == v->tgt) &&
++ (entry->v.lun == v->lun)) {
++ sdev = entry->sdev;
++ goto out;
++ }
++ }
++out:
++ spin_unlock_irqrestore(&info->v2p_lock, flags);
++ return sdev;
++}
++
++
++/*
++ Release the translation entry specfied
++*/
++void scsiback_release_translation_entry(struct vscsibk_info *info)
++{
++ struct v2p_entry *entry, *tmp;
++ struct list_head *head = &(info->v2p_entry_lists);
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->v2p_lock, flags);
++ list_for_each_entry_safe(entry, tmp, head, l) {
++ scsi_device_put(entry->sdev);
++ list_del(&entry->l);
++ kfree(entry);
++ }
++
++ spin_unlock_irqrestore(&info->v2p_lock, flags);
++ return;
++
++}
+Index: head-2008-11-25/drivers/xen/scsiback/xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsiback/xenbus.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,368 @@
++/*
++ * Xen SCSI backend driver
++ *
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * Based on the blkback driver code.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <stdarg.h>
++#include <linux/module.h>
++#include <linux/kthread.h>
++#include <scsi/scsi.h>
++#include <scsi/scsi_host.h>
++#include <scsi/scsi_device.h>
++
++#include "common.h"
++
++struct backend_info
++{
++ struct xenbus_device *dev;
++ struct vscsibk_info *info;
++};
++
++
++static int __vscsiif_name(struct backend_info *be, char *buf)
++{
++ struct xenbus_device *dev = be->dev;
++ unsigned int domid, id;
++
++ sscanf(dev->nodename, "backend/vscsi/%u/%u", &domid, &id);
++ snprintf(buf, TASK_COMM_LEN, "vscsi.%u.%u", be->info->domid, id);
++
++ return 0;
++}
++
++static int scsiback_map(struct backend_info *be)
++{
++ struct xenbus_device *dev = be->dev;
++ unsigned long ring_ref;
++ unsigned int evtchn;
++ int err;
++ char name[TASK_COMM_LEN];
++
++ err = xenbus_gather(XBT_NIL, dev->otherend,
++ "ring-ref", "%lu", &ring_ref,
++ "event-channel", "%u", &evtchn, NULL);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "reading %s ring", dev->otherend);
++ return err;
++ }
++
++ err = scsiback_init_sring(be->info, ring_ref, evtchn);
++ if (err)
++ return err;
++
++ err = __vscsiif_name(be, name);
++ if (err) {
++ xenbus_dev_error(dev, err, "get scsiback dev name");
++ return err;
++ }
++
++ be->info->kthread = kthread_run(scsiback_schedule, be->info, name);
++ if (IS_ERR(be->info->kthread)) {
++ err = PTR_ERR(be->info->kthread);
++ be->info->kthread = NULL;
++ xenbus_dev_error(be->dev, err, "start vscsiif");
++ return err;
++ }
++
++ return 0;
++}
++
++
++struct scsi_device *scsiback_get_scsi_device(struct ids_tuple *phy)
++{
++ struct Scsi_Host *shost;
++ struct scsi_device *sdev = NULL;
++
++ shost = scsi_host_lookup(phy->hst);
++ if (IS_ERR(shost)) {
++ printk(KERN_ERR "scsiback: host%d doesn't exist.\n",
++ phy->hst);
++ return NULL;
++ }
++ sdev = scsi_device_lookup(shost, phy->chn, phy->tgt, phy->lun);
++ if (!sdev) {
++ printk(KERN_ERR "scsiback: %d:%d:%d:%d doesn't exist.\n",
++ phy->hst, phy->chn, phy->tgt, phy->lun);
++ scsi_host_put(shost);
++ return NULL;
++ }
++
++ scsi_host_put(shost);
++ return (sdev);
++}
++
++#define VSCSIBACK_OP_ADD_OR_DEL_LUN 1
++#define VSCSIBACK_OP_UPDATEDEV_STATE 2
++
++
++static void scsiback_do_lun_hotplug(struct backend_info *be, int op)
++{
++ int i, err = 0;
++ struct ids_tuple phy, vir;
++ int device_state;
++ char str[64], state_str[64];
++ char **dir;
++ unsigned int dir_n = 0;
++ struct xenbus_device *dev = be->dev;
++ struct scsi_device *sdev;
++
++ dir = xenbus_directory(XBT_NIL, dev->nodename, "vscsi-devs", &dir_n);
++ if (IS_ERR(dir))
++ return;
++
++ for (i = 0; i < dir_n; i++) {
++
++ /* read status */
++ snprintf(state_str, sizeof(state_str), "vscsi-devs/%s/state", dir[i]);
++ err = xenbus_scanf(XBT_NIL, dev->nodename, state_str, "%u",
++ &device_state);
++ if (XENBUS_EXIST_ERR(err))
++ continue;
++
++ /* physical SCSI device */
++ snprintf(str, sizeof(str), "vscsi-devs/%s/p-dev", dir[i]);
++ err = xenbus_scanf(XBT_NIL, dev->nodename, str,
++ "%u:%u:%u:%u", &phy.hst, &phy.chn, &phy.tgt, &phy.lun);
++ if (XENBUS_EXIST_ERR(err)) {
++ xenbus_printf(XBT_NIL, dev->nodename, state_str,
++ "%d", XenbusStateClosed);
++ continue;
++ }
++
++ /* virtual SCSI device */
++ snprintf(str, sizeof(str), "vscsi-devs/%s/v-dev", dir[i]);
++ err = xenbus_scanf(XBT_NIL, dev->nodename, str,
++ "%u:%u:%u:%u", &vir.hst, &vir.chn, &vir.tgt, &vir.lun);
++ if (XENBUS_EXIST_ERR(err)) {
++ xenbus_printf(XBT_NIL, dev->nodename, state_str,
++ "%d", XenbusStateClosed);
++ continue;
++ }
++
++ switch (op) {
++ case VSCSIBACK_OP_ADD_OR_DEL_LUN:
++ if (device_state == XenbusStateInitialising) {
++ sdev = scsiback_get_scsi_device(&phy);
++ if (!sdev)
++ xenbus_printf(XBT_NIL, dev->nodename, state_str,
++ "%d", XenbusStateClosed);
++ else {
++ err = scsiback_add_translation_entry(be->info, sdev, &vir);
++ if (!err) {
++ if (xenbus_printf(XBT_NIL, dev->nodename, state_str,
++ "%d", XenbusStateInitialised)) {
++ printk(KERN_ERR "scsiback: xenbus_printf error %s\n", state_str);
++ scsiback_del_translation_entry(be->info, &vir);
++ }
++ } else {
++ scsi_device_put(sdev);
++ xenbus_printf(XBT_NIL, dev->nodename, state_str,
++ "%d", XenbusStateClosed);
++ }
++ }
++ }
++
++ if (device_state == XenbusStateClosing) {
++ if (!scsiback_del_translation_entry(be->info, &vir)) {
++ if (xenbus_printf(XBT_NIL, dev->nodename, state_str,
++ "%d", XenbusStateClosed))
++ printk(KERN_ERR "scsiback: xenbus_printf error %s\n", state_str);
++ }
++ }
++ break;
++
++ case VSCSIBACK_OP_UPDATEDEV_STATE:
++ if (device_state == XenbusStateInitialised) {
++ /* modify vscsi-devs/dev-x/state */
++ if (xenbus_printf(XBT_NIL, dev->nodename, state_str,
++ "%d", XenbusStateConnected)) {
++ printk(KERN_ERR "scsiback: xenbus_printf error %s\n", state_str);
++ scsiback_del_translation_entry(be->info, &vir);
++ xenbus_printf(XBT_NIL, dev->nodename, state_str,
++ "%d", XenbusStateClosed);
++ }
++ }
++ break;
++ /*When it is necessary, processing is added here.*/
++ default:
++ break;
++ }
++ }
++
++ kfree(dir);
++ return ;
++}
++
++
++static void scsiback_frontend_changed(struct xenbus_device *dev,
++ enum xenbus_state frontend_state)
++{
++ struct backend_info *be = dev->dev.driver_data;
++ int err;
++
++ switch (frontend_state) {
++ case XenbusStateInitialising:
++ break;
++ case XenbusStateInitialised:
++ err = scsiback_map(be);
++ if (err)
++ break;
++
++ scsiback_do_lun_hotplug(be, VSCSIBACK_OP_ADD_OR_DEL_LUN);
++ xenbus_switch_state(dev, XenbusStateConnected);
++
++ break;
++ case XenbusStateConnected:
++
++ scsiback_do_lun_hotplug(be, VSCSIBACK_OP_UPDATEDEV_STATE);
++
++ if (dev->state == XenbusStateConnected)
++ break;
++
++ xenbus_switch_state(dev, XenbusStateConnected);
++
++ break;
++
++ case XenbusStateClosing:
++ scsiback_disconnect(be->info);
++ xenbus_switch_state(dev, XenbusStateClosing);
++ break;
++
++ case XenbusStateClosed:
++ xenbus_switch_state(dev, XenbusStateClosed);
++ if (xenbus_dev_is_online(dev))
++ break;
++ /* fall through if not online */
++ case XenbusStateUnknown:
++ device_unregister(&dev->dev);
++ break;
++
++ case XenbusStateReconfiguring:
++ scsiback_do_lun_hotplug(be, VSCSIBACK_OP_ADD_OR_DEL_LUN);
++
++ xenbus_switch_state(dev, XenbusStateReconfigured);
++
++ break;
++
++ default:
++ xenbus_dev_fatal(dev, -EINVAL, "saw state %d at frontend",
++ frontend_state);
++ break;
++ }
++}
++
++
++static int scsiback_remove(struct xenbus_device *dev)
++{
++ struct backend_info *be = dev->dev.driver_data;
++
++ if (be->info) {
++ scsiback_disconnect(be->info);
++ scsiback_release_translation_entry(be->info);
++ scsiback_free(be->info);
++ be->info = NULL;
++ }
++
++ kfree(be);
++ dev->dev.driver_data = NULL;
++
++ return 0;
++}
++
++
++static int scsiback_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int err;
++
++ struct backend_info *be = kzalloc(sizeof(struct backend_info),
++ GFP_KERNEL);
++
++ DPRINTK("%p %d\n", dev, dev->otherend_id);
++
++ if (!be) {
++ xenbus_dev_fatal(dev, -ENOMEM,
++ "allocating backend structure");
++ return -ENOMEM;
++ }
++ be->dev = dev;
++ dev->dev.driver_data = be;
++
++ be->info = vscsibk_info_alloc(dev->otherend_id);
++ if (IS_ERR(be->info)) {
++ err = PTR_ERR(be->info);
++ be->info = NULL;
++ xenbus_dev_fatal(dev, err, "creating scsihost interface");
++ goto fail;
++ }
++
++ be->info->dev = dev;
++ be->info->irq = 0;
++
++ scsiback_init_translation_table(be->info);
++
++ err = xenbus_switch_state(dev, XenbusStateInitWait);
++ if (err)
++ goto fail;
++
++ return 0;
++
++
++fail:
++ printk(KERN_WARNING "scsiback: %s failed\n",__FUNCTION__);
++ scsiback_remove(dev);
++
++ return err;
++}
++
++
++static struct xenbus_device_id scsiback_ids[] = {
++ { "vscsi" },
++ { "" }
++};
++
++static struct xenbus_driver scsiback = {
++ .name = "vscsi",
++ .owner = THIS_MODULE,
++ .ids = scsiback_ids,
++ .probe = scsiback_probe,
++ .remove = scsiback_remove,
++ .otherend_changed = scsiback_frontend_changed
++};
++
++int scsiback_xenbus_init(void)
++{
++ return xenbus_register_backend(&scsiback);
++}
++
++void scsiback_xenbus_unregister(void)
++{
++ xenbus_unregister_driver(&scsiback);
++}
+Index: head-2008-11-25/drivers/xen/scsifront/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsifront/Makefile 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,3 @@
++
++obj-$(CONFIG_XEN_SCSI_FRONTEND) := xenscsi.o
++xenscsi-objs := scsifront.o xenbus.o
+Index: head-2008-11-25/drivers/xen/scsifront/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsifront/common.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,129 @@
++/*
++ * Xen SCSI frontend driver
++ *
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_DRIVERS_SCSIFRONT_H__
++#define __XEN_DRIVERS_SCSIFRONT_H__
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/device.h>
++#include <linux/kthread.h>
++#include <linux/wait.h>
++#include <linux/interrupt.h>
++#include <linux/spinlock.h>
++#include <linux/sched.h>
++#include <linux/blkdev.h>
++#include <scsi/scsi_cmnd.h>
++#include <scsi/scsi_device.h>
++#include <scsi/scsi.h>
++#include <scsi/scsi_host.h>
++#include <xen/xenbus.h>
++#include <xen/gnttab.h>
++#include <xen/evtchn.h>
++#include <xen/interface/xen.h>
++#include <xen/interface/io/ring.h>
++#include <xen/interface/io/vscsiif.h>
++#include <asm/delay.h>
++
++
++#define GRANT_INVALID_REF 0
++#define VSCSI_IN_ABORT 1
++#define VSCSI_IN_RESET 2
++
++/* tuning point*/
++#define VSCSIIF_DEFAULT_CMD_PER_LUN 10
++#define VSCSIIF_MAX_TARGET 64
++#define VSCSIIF_MAX_LUN 255
++
++#define VSCSIIF_RING_SIZE \
++ __RING_SIZE((struct vscsiif_sring *)0, PAGE_SIZE)
++#define VSCSIIF_MAX_REQS VSCSIIF_RING_SIZE
++
++struct vscsifrnt_shadow {
++ uint16_t next_free;
++
++ /* command between backend and frontend
++ * VSCSIIF_ACT_SCSI_CDB or VSCSIIF_ACT_SCSI_RESET */
++ unsigned char act;
++
++ /* do reset function */
++ wait_queue_head_t wq_reset; /* reset work queue */
++ int wait_reset; /* reset work queue condition */
++ int32_t rslt_reset; /* reset response status */
++ /* (SUCESS or FAILED) */
++
++ /* for DMA_TO_DEVICE(1), DMA_FROM_DEVICE(2), DMA_NONE(3)
++ requests */
++ unsigned int sc_data_direction;
++
++ /* Number of pieces of scatter-gather */
++ unsigned int nr_segments;
++
++ /* requested struct scsi_cmnd is stored from kernel */
++ unsigned long req_scsi_cmnd;
++ int gref[VSCSIIF_SG_TABLESIZE];
++};
++
++struct vscsifrnt_info {
++ struct xenbus_device *dev;
++
++ struct Scsi_Host *host;
++
++ spinlock_t io_lock;
++ spinlock_t shadow_lock;
++ unsigned int evtchn;
++ unsigned int irq;
++
++ grant_ref_t ring_ref;
++ struct vscsiif_front_ring ring;
++ struct vscsiif_response ring_res;
++
++ struct vscsifrnt_shadow shadow[VSCSIIF_MAX_REQS];
++ uint32_t shadow_free;
++
++ struct task_struct *kthread;
++ wait_queue_head_t wq;
++ unsigned int waiting_resp;
++
++};
++
++#define DPRINTK(_f, _a...) \
++ pr_debug("(file=%s, line=%d) " _f, \
++ __FILE__ , __LINE__ , ## _a )
++
++int scsifront_xenbus_init(void);
++void scsifront_xenbus_unregister(void);
++int scsifront_schedule(void *data);
++irqreturn_t scsifront_intr(int irq, void *dev_id, struct pt_regs *ptregs);
++int scsifront_cmd_done(struct vscsifrnt_info *info);
++
++
++#endif /* __XEN_DRIVERS_SCSIFRONT_H__ */
+Index: head-2008-11-25/drivers/xen/scsifront/scsifront.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsifront/scsifront.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,511 @@
++/*
++ * Xen SCSI frontend driver
++ *
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++
++#include <linux/version.h>
++#include "common.h"
++
++static int get_id_from_freelist(struct vscsifrnt_info *info)
++{
++ unsigned long flags;
++ uint32_t free;
++
++ spin_lock_irqsave(&info->shadow_lock, flags);
++
++ free = info->shadow_free;
++ BUG_ON(free > VSCSIIF_MAX_REQS);
++ info->shadow_free = info->shadow[free].next_free;
++ info->shadow[free].next_free = 0x0fff;
++
++ info->shadow[free].wait_reset = 0;
++
++ spin_unlock_irqrestore(&info->shadow_lock, flags);
++
++ return free;
++}
++
++static void add_id_to_freelist(struct vscsifrnt_info *info, uint32_t id)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->shadow_lock, flags);
++
++ info->shadow[id].next_free = info->shadow_free;
++ info->shadow[id].req_scsi_cmnd = 0;
++ info->shadow_free = id;
++
++ spin_unlock_irqrestore(&info->shadow_lock, flags);
++}
++
++
++struct vscsiif_request * scsifront_pre_request(struct vscsifrnt_info *info)
++{
++ struct vscsiif_front_ring *ring = &(info->ring);
++ vscsiif_request_t *ring_req;
++ uint32_t id;
++
++ ring_req = RING_GET_REQUEST(&(info->ring), ring->req_prod_pvt);
++
++ ring->req_prod_pvt++;
++
++ id = get_id_from_freelist(info); /* use id by response */
++ ring_req->rqid = (uint16_t)id;
++
++ return ring_req;
++}
++
++
++static void scsifront_notify_work(struct vscsifrnt_info *info)
++{
++ info->waiting_resp = 1;
++ wake_up(&info->wq);
++}
++
++
++static void scsifront_do_request(struct vscsifrnt_info *info)
++{
++ struct vscsiif_front_ring *ring = &(info->ring);
++ unsigned int irq = info->irq;
++ int notify;
++
++ RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(ring, notify);
++ if (notify)
++ notify_remote_via_irq(irq);
++}
++
++irqreturn_t scsifront_intr(int irq, void *dev_id, struct pt_regs *ptregs)
++{
++ scsifront_notify_work((struct vscsifrnt_info *)dev_id);
++ return IRQ_HANDLED;
++}
++
++
++static void scsifront_gnttab_done(struct vscsifrnt_shadow *s, uint32_t id)
++{
++ int i;
++
++ if (s->sc_data_direction == DMA_NONE)
++ return;
++
++ if (s->nr_segments) {
++ for (i = 0; i < s->nr_segments; i++) {
++ if (unlikely(gnttab_query_foreign_access(
++ s->gref[i]) != 0)) {
++ printk(KERN_ALERT "scsifront: "
++ "grant still in use by backend.\n");
++ BUG();
++ }
++ gnttab_end_foreign_access(s->gref[i], 0UL);
++ }
++ }
++
++ return;
++}
++
++
++static void scsifront_cdb_cmd_done(struct vscsifrnt_info *info,
++ vscsiif_response_t *ring_res)
++{
++ struct scsi_cmnd *sc;
++ uint32_t id;
++ uint8_t sense_len;
++
++ id = ring_res->rqid;
++ sc = (struct scsi_cmnd *)info->shadow[id].req_scsi_cmnd;
++
++ if (sc == NULL)
++ BUG();
++
++ scsifront_gnttab_done(&info->shadow[id], id);
++ add_id_to_freelist(info, id);
++
++ sc->result = ring_res->rslt;
++ sc->resid = ring_res->residual_len;
++
++ if (ring_res->sense_len > VSCSIIF_SENSE_BUFFERSIZE)
++ sense_len = VSCSIIF_SENSE_BUFFERSIZE;
++ else
++ sense_len = ring_res->sense_len;
++
++ if (sense_len)
++ memcpy(sc->sense_buffer, ring_res->sense_buffer, sense_len);
++
++ sc->scsi_done(sc);
++
++ return;
++}
++
++
++static void scsifront_sync_cmd_done(struct vscsifrnt_info *info,
++ vscsiif_response_t *ring_res)
++{
++ uint16_t id = ring_res->rqid;
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->shadow_lock, flags);
++ info->shadow[id].wait_reset = 1;
++ info->shadow[id].rslt_reset = ring_res->rslt;
++ spin_unlock_irqrestore(&info->shadow_lock, flags);
++
++ wake_up(&(info->shadow[id].wq_reset));
++}
++
++
++int scsifront_cmd_done(struct vscsifrnt_info *info)
++{
++ vscsiif_response_t *ring_res;
++
++ RING_IDX i, rp;
++ int more_to_do = 0;
++ unsigned long flags;
++
++ spin_lock_irqsave(&info->io_lock, flags);
++
++ rp = info->ring.sring->rsp_prod;
++ rmb();
++ for (i = info->ring.rsp_cons; i != rp; i++) {
++
++ ring_res = RING_GET_RESPONSE(&info->ring, i);
++
++ if (info->shadow[ring_res->rqid].act == VSCSIIF_ACT_SCSI_CDB)
++ scsifront_cdb_cmd_done(info, ring_res);
++ else
++ scsifront_sync_cmd_done(info, ring_res);
++ }
++
++ info->ring.rsp_cons = i;
++
++ if (i != info->ring.req_prod_pvt) {
++ RING_FINAL_CHECK_FOR_RESPONSES(&info->ring, more_to_do);
++ } else {
++ info->ring.sring->rsp_event = i + 1;
++ }
++
++ spin_unlock_irqrestore(&info->io_lock, flags);
++
++
++ /* Yield point for this unbounded loop. */
++ cond_resched();
++
++ return more_to_do;
++}
++
++
++
++
++int scsifront_schedule(void *data)
++{
++ struct vscsifrnt_info *info = (struct vscsifrnt_info *)data;
++
++ while (!kthread_should_stop()) {
++ wait_event_interruptible(
++ info->wq,
++ info->waiting_resp || kthread_should_stop());
++
++ info->waiting_resp = 0;
++ smp_mb();
++
++ if (scsifront_cmd_done(info))
++ info->waiting_resp = 1;
++ }
++
++ return 0;
++}
++
++
++
++static int map_data_for_request(struct vscsifrnt_info *info,
++ struct scsi_cmnd *sc, vscsiif_request_t *ring_req, uint32_t id)
++{
++ grant_ref_t gref_head;
++ struct page *page;
++ int err, i, ref, ref_cnt = 0;
++ int write = (sc->sc_data_direction == DMA_TO_DEVICE);
++ int nr_pages, off, len, bytes;
++ unsigned long buffer_pfn;
++ unsigned int data_len = 0;
++
++ if (sc->sc_data_direction == DMA_NONE)
++ return 0;
++
++ err = gnttab_alloc_grant_references(VSCSIIF_SG_TABLESIZE, &gref_head);
++ if (err) {
++ printk(KERN_ERR "scsifront: gnttab_alloc_grant_references() error\n");
++ return -ENOMEM;
++ }
++
++ if (sc->use_sg) {
++ /* quoted scsi_lib.c/scsi_req_map_sg . */
++ struct scatterlist *sg = (struct scatterlist *)sc->request_buffer;
++ nr_pages = (sc->request_bufflen + sg[0].offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
++
++ if (nr_pages > VSCSIIF_SG_TABLESIZE) {
++ printk(KERN_ERR "scsifront: Unable to map request_buffer for command!\n");
++ ref_cnt = (-E2BIG);
++ goto big_to_sg;
++ }
++
++ for (i = 0; i < sc->use_sg; i++) {
++ page = sg[i].page;
++ off = sg[i].offset;
++ len = sg[i].length;
++ data_len += len;
++
++ buffer_pfn = page_to_phys(page) >> PAGE_SHIFT;
++
++ while (len > 0) {
++ bytes = min_t(unsigned int, len, PAGE_SIZE - off);
++
++ ref = gnttab_claim_grant_reference(&gref_head);
++ BUG_ON(ref == -ENOSPC);
++
++ gnttab_grant_foreign_access_ref(ref, info->dev->otherend_id,
++ buffer_pfn, write);
++
++ info->shadow[id].gref[ref_cnt] = ref;
++ ring_req->seg[ref_cnt].gref = ref;
++ ring_req->seg[ref_cnt].offset = (uint16_t)off;
++ ring_req->seg[ref_cnt].length = (uint16_t)bytes;
++
++ buffer_pfn++;
++ len -= bytes;
++ off = 0;
++ ref_cnt++;
++ }
++ }
++ } else if (sc->request_bufflen) {
++ unsigned long end = ((unsigned long)sc->request_buffer
++ + sc->request_bufflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
++ unsigned long start = (unsigned long)sc->request_buffer >> PAGE_SHIFT;
++
++ page = virt_to_page(sc->request_buffer);
++ nr_pages = end - start;
++ len = sc->request_bufflen;
++
++ if (nr_pages > VSCSIIF_SG_TABLESIZE) {
++ ref_cnt = (-E2BIG);
++ goto big_to_sg;
++ }
++
++ buffer_pfn = page_to_phys(page) >> PAGE_SHIFT;
++
++ off = offset_in_page((unsigned long)sc->request_buffer);
++ for (i = 0; i < nr_pages; i++) {
++ bytes = PAGE_SIZE - off;
++
++ if (bytes > len)
++ bytes = len;
++
++ ref = gnttab_claim_grant_reference(&gref_head);
++ BUG_ON(ref == -ENOSPC);
++
++ gnttab_grant_foreign_access_ref(ref, info->dev->otherend_id,
++ buffer_pfn, write);
++
++ info->shadow[id].gref[i] = ref;
++ ring_req->seg[i].gref = ref;
++ ring_req->seg[i].offset = (uint16_t)off;
++ ring_req->seg[i].length = (uint16_t)bytes;
++
++ buffer_pfn++;
++ len -= bytes;
++ off = 0;
++ ref_cnt++;
++ }
++ }
++
++big_to_sg:
++
++ gnttab_free_grant_references(gref_head);
++
++ return ref_cnt;
++}
++
++static int scsifront_queuecommand(struct scsi_cmnd *sc,
++ void (*done)(struct scsi_cmnd *))
++{
++ struct vscsifrnt_info *info =
++ (struct vscsifrnt_info *) sc->device->host->hostdata;
++ vscsiif_request_t *ring_req;
++ int ref_cnt;
++ uint16_t rqid;
++
++ if (RING_FULL(&info->ring)) {
++ goto out_host_busy;
++ }
++
++ sc->scsi_done = done;
++ sc->result = 0;
++
++ ring_req = scsifront_pre_request(info);
++ rqid = ring_req->rqid;
++ ring_req->act = VSCSIIF_ACT_SCSI_CDB;
++
++ ring_req->id = sc->device->id;
++ ring_req->lun = sc->device->lun;
++ ring_req->channel = sc->device->channel;
++ ring_req->cmd_len = sc->cmd_len;
++
++ BUG_ON(sc->cmd_len > VSCSIIF_MAX_COMMAND_SIZE);
++
++ if ( sc->cmd_len )
++ memcpy(ring_req->cmnd, sc->cmnd, sc->cmd_len);
++ else
++ memset(ring_req->cmnd, 0, VSCSIIF_MAX_COMMAND_SIZE);
++
++ ring_req->sc_data_direction = (uint8_t)sc->sc_data_direction;
++ ring_req->timeout_per_command = (sc->timeout_per_command / HZ);
++
++ info->shadow[rqid].req_scsi_cmnd = (unsigned long)sc;
++ info->shadow[rqid].sc_data_direction = sc->sc_data_direction;
++ info->shadow[rqid].act = ring_req->act;
++
++ ref_cnt = map_data_for_request(info, sc, ring_req, rqid);
++ if (ref_cnt < 0) {
++ add_id_to_freelist(info, rqid);
++ if (ref_cnt == (-ENOMEM))
++ goto out_host_busy;
++ else {
++ sc->result = (DID_ERROR << 16);
++ goto out_fail_command;
++ }
++ }
++
++ ring_req->nr_segments = (uint8_t)ref_cnt;
++ info->shadow[rqid].nr_segments = ref_cnt;
++
++ scsifront_do_request(info);
++
++ return 0;
++
++out_host_busy:
++ return SCSI_MLQUEUE_HOST_BUSY;
++
++out_fail_command:
++ done(sc);
++ return 0;
++}
++
++
++static int scsifront_eh_abort_handler(struct scsi_cmnd *sc)
++{
++ return (FAILED);
++}
++
++/* vscsi supports only device_reset, because it is each of LUNs */
++static int scsifront_dev_reset_handler(struct scsi_cmnd *sc)
++{
++ struct Scsi_Host *host = sc->device->host;
++ struct vscsifrnt_info *info =
++ (struct vscsifrnt_info *) sc->device->host->hostdata;
++
++ vscsiif_request_t *ring_req;
++ uint16_t rqid;
++ int err;
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)
++ spin_lock_irq(host->host_lock);
++#endif
++
++ ring_req = scsifront_pre_request(info);
++ ring_req->act = VSCSIIF_ACT_SCSI_RESET;
++
++ rqid = ring_req->rqid;
++ info->shadow[rqid].act = VSCSIIF_ACT_SCSI_RESET;
++
++ ring_req->channel = sc->device->channel;
++ ring_req->id = sc->device->id;
++ ring_req->lun = sc->device->lun;
++ ring_req->cmd_len = sc->cmd_len;
++
++ if ( sc->cmd_len )
++ memcpy(ring_req->cmnd, sc->cmnd, sc->cmd_len);
++ else
++ memset(ring_req->cmnd, 0, VSCSIIF_MAX_COMMAND_SIZE);
++
++ ring_req->sc_data_direction = (uint8_t)sc->sc_data_direction;
++ ring_req->timeout_per_command = (sc->timeout_per_command / HZ);
++ ring_req->nr_segments = 0;
++
++ scsifront_do_request(info);
++
++ spin_unlock_irq(host->host_lock);
++ wait_event_interruptible(info->shadow[rqid].wq_reset,
++ info->shadow[rqid].wait_reset);
++ spin_lock_irq(host->host_lock);
++
++ err = info->shadow[rqid].rslt_reset;
++
++ add_id_to_freelist(info, rqid);
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)
++ spin_unlock_irq(host->host_lock);
++#endif
++ return (err);
++}
++
++
++struct scsi_host_template scsifront_sht = {
++ .module = THIS_MODULE,
++ .name = "Xen SCSI frontend driver",
++ .queuecommand = scsifront_queuecommand,
++ .eh_abort_handler = scsifront_eh_abort_handler,
++ .eh_device_reset_handler= scsifront_dev_reset_handler,
++ .cmd_per_lun = VSCSIIF_DEFAULT_CMD_PER_LUN,
++ .can_queue = VSCSIIF_MAX_REQS,
++ .this_id = -1,
++ .sg_tablesize = VSCSIIF_SG_TABLESIZE,
++ .use_clustering = DISABLE_CLUSTERING,
++ .proc_name = "scsifront",
++};
++
++
++static int __init scsifront_init(void)
++{
++ int err;
++
++ if (!is_running_on_xen())
++ return -ENODEV;
++
++ err = scsifront_xenbus_init();
++
++ return err;
++}
++
++static void __exit scsifront_exit(void)
++{
++ scsifront_xenbus_unregister();
++}
++
++module_init(scsifront_init);
++module_exit(scsifront_exit);
++
++MODULE_DESCRIPTION("Xen SCSI frontend driver");
++MODULE_LICENSE("GPL");
+Index: head-2008-11-25/drivers/xen/scsifront/xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/scsifront/xenbus.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,421 @@
++/*
++ * Xen SCSI frontend driver
++ *
++ * Copyright (c) 2008, FUJITSU Limited
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++
++#include <linux/version.h>
++#include "common.h"
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
++ #define DEFAULT_TASK_COMM_LEN 16
++#else
++ #define DEFAULT_TASK_COMM_LEN TASK_COMM_LEN
++#endif
++
++extern struct scsi_host_template scsifront_sht;
++
++static void scsifront_free(struct vscsifrnt_info *info)
++{
++ struct Scsi_Host *host = info->host;
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
++ if (host->shost_state != SHOST_DEL) {
++#else
++ if (!test_bit(SHOST_DEL, &host->shost_state)) {
++#endif
++ scsi_remove_host(info->host);
++ }
++
++ if (info->ring_ref != GRANT_INVALID_REF) {
++ gnttab_end_foreign_access(info->ring_ref,
++ (unsigned long)info->ring.sring);
++ info->ring_ref = GRANT_INVALID_REF;
++ info->ring.sring = NULL;
++ }
++
++ if (info->irq)
++ unbind_from_irqhandler(info->irq, info);
++ info->irq = 0;
++
++ scsi_host_put(info->host);
++}
++
++
++static int scsifront_alloc_ring(struct vscsifrnt_info *info)
++{
++ struct xenbus_device *dev = info->dev;
++ struct vscsiif_sring *sring;
++ int err = -ENOMEM;
++
++
++ info->ring_ref = GRANT_INVALID_REF;
++
++ /***** Frontend to Backend ring start *****/
++ sring = (struct vscsiif_sring *) __get_free_page(GFP_KERNEL);
++ if (!sring) {
++ xenbus_dev_fatal(dev, err, "fail to allocate shared ring (Front to Back)");
++ return err;
++ }
++ SHARED_RING_INIT(sring);
++ FRONT_RING_INIT(&info->ring, sring, PAGE_SIZE);
++
++ err = xenbus_grant_ring(dev, virt_to_mfn(sring));
++ if (err < 0) {
++ free_page((unsigned long) sring);
++ info->ring.sring = NULL;
++ xenbus_dev_fatal(dev, err, "fail to grant shared ring (Front to Back)");
++ goto free_sring;
++ }
++ info->ring_ref = err;
++
++ err = bind_listening_port_to_irqhandler(
++ dev->otherend_id, scsifront_intr,
++ SA_SAMPLE_RANDOM, "scsifront", info);
++
++ if (err <= 0) {
++ xenbus_dev_fatal(dev, err, "bind_listening_port_to_irqhandler");
++ goto free_sring;
++ }
++ info->irq = err;
++
++ return 0;
++
++/* free resource */
++free_sring:
++ scsifront_free(info);
++
++ return err;
++}
++
++
++static int scsifront_init_ring(struct vscsifrnt_info *info)
++{
++ struct xenbus_device *dev = info->dev;
++ struct xenbus_transaction xbt;
++ int err;
++
++ DPRINTK("%s\n",__FUNCTION__);
++
++ err = scsifront_alloc_ring(info);
++ if (err)
++ return err;
++ DPRINTK("%u %u\n", info->ring_ref, info->evtchn);
++
++again:
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "starting transaction");
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "ring-ref", "%u",
++ info->ring_ref);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "%s", "writing ring-ref");
++ goto fail;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
++ irq_to_evtchn_port(info->irq));
++
++ if (err) {
++ xenbus_dev_fatal(dev, err, "%s", "writing event-channel");
++ goto fail;
++ }
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err) {
++ if (err == -EAGAIN)
++ goto again;
++ xenbus_dev_fatal(dev, err, "completing transaction");
++ goto free_sring;
++ }
++
++ return 0;
++
++fail:
++ xenbus_transaction_end(xbt, 1);
++free_sring:
++ /* free resource */
++ scsifront_free(info);
++
++ return err;
++}
++
++
++static int scsifront_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ struct vscsifrnt_info *info;
++ struct Scsi_Host *host;
++ int i, err = -ENOMEM;
++ char name[DEFAULT_TASK_COMM_LEN];
++
++ host = scsi_host_alloc(&scsifront_sht, sizeof(*info));
++ if (!host) {
++ xenbus_dev_fatal(dev, err, "fail to allocate scsi host");
++ return err;
++ }
++ info = (struct vscsifrnt_info *) host->hostdata;
++ info->host = host;
++
++
++ dev->dev.driver_data = info;
++ info->dev = dev;
++
++ for (i = 0; i < VSCSIIF_MAX_REQS; i++) {
++ info->shadow[i].next_free = i + 1;
++ init_waitqueue_head(&(info->shadow[i].wq_reset));
++ info->shadow[i].wait_reset = 0;
++ }
++ info->shadow[VSCSIIF_MAX_REQS - 1].next_free = 0x0fff;
++
++ err = scsifront_init_ring(info);
++ if (err) {
++ scsi_host_put(host);
++ return err;
++ }
++
++ init_waitqueue_head(&info->wq);
++ spin_lock_init(&info->io_lock);
++ spin_lock_init(&info->shadow_lock);
++
++ snprintf(name, DEFAULT_TASK_COMM_LEN, "vscsiif.%d", info->host->host_no);
++
++ info->kthread = kthread_run(scsifront_schedule, info, name);
++ if (IS_ERR(info->kthread)) {
++ err = PTR_ERR(info->kthread);
++ info->kthread = NULL;
++ printk(KERN_ERR "scsifront: kthread start err %d\n", err);
++ goto free_sring;
++ }
++
++ host->max_id = VSCSIIF_MAX_TARGET;
++ host->max_channel = 0;
++ host->max_lun = VSCSIIF_MAX_LUN;
++ host->max_sectors = (VSCSIIF_SG_TABLESIZE - 1) * PAGE_SIZE / 512;
++
++ err = scsi_add_host(host, &dev->dev);
++ if (err) {
++ printk(KERN_ERR "scsifront: fail to add scsi host %d\n", err);
++ goto free_sring;
++ }
++
++ xenbus_switch_state(dev, XenbusStateInitialised);
++
++ return 0;
++
++free_sring:
++ /* free resource */
++ scsifront_free(info);
++ return err;
++}
++
++static int scsifront_remove(struct xenbus_device *dev)
++{
++ struct vscsifrnt_info *info = dev->dev.driver_data;
++
++ DPRINTK("%s: %s removed\n",__FUNCTION__ ,dev->nodename);
++
++ if (info->kthread) {
++ kthread_stop(info->kthread);
++ info->kthread = NULL;
++ }
++
++ scsifront_free(info);
++
++ return 0;
++}
++
++
++static int scsifront_disconnect(struct vscsifrnt_info *info)
++{
++ struct xenbus_device *dev = info->dev;
++ struct Scsi_Host *host = info->host;
++
++ DPRINTK("%s: %s disconnect\n",__FUNCTION__ ,dev->nodename);
++
++ /*
++ When this function is executed, all devices of
++ Frontend have been deleted.
++ Therefore, it need not block I/O before remove_host.
++ */
++
++ scsi_remove_host(host);
++ xenbus_frontend_closed(dev);
++
++ return 0;
++}
++
++#define VSCSIFRONT_OP_ADD_LUN 1
++#define VSCSIFRONT_OP_DEL_LUN 2
++
++static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
++{
++ struct xenbus_device *dev = info->dev;
++ int i, err = 0;
++ char str[64], state_str[64];
++ char **dir;
++ unsigned int dir_n = 0;
++ unsigned int device_state;
++ unsigned int hst, chn, tgt, lun;
++ struct scsi_device *sdev;
++
++ dir = xenbus_directory(XBT_NIL, dev->otherend, "vscsi-devs", &dir_n);
++ if (IS_ERR(dir))
++ return;
++
++ for (i = 0; i < dir_n; i++) {
++ /* read status */
++ snprintf(str, sizeof(str), "vscsi-devs/%s/state", dir[i]);
++ err = xenbus_scanf(XBT_NIL, dev->otherend, str, "%u",
++ &device_state);
++ if (XENBUS_EXIST_ERR(err))
++ continue;
++
++ /* virtual SCSI device */
++ snprintf(str, sizeof(str), "vscsi-devs/%s/v-dev", dir[i]);
++ err = xenbus_scanf(XBT_NIL, dev->otherend, str,
++ "%u:%u:%u:%u", &hst, &chn, &tgt, &lun);
++ if (XENBUS_EXIST_ERR(err))
++ continue;
++
++ /* front device state path */
++ snprintf(state_str, sizeof(state_str), "vscsi-devs/%s/state", dir[i]);
++
++ switch (op) {
++ case VSCSIFRONT_OP_ADD_LUN:
++ if (device_state == XenbusStateInitialised) {
++ sdev = scsi_device_lookup(info->host, chn, tgt, lun);
++ if (sdev) {
++ printk(KERN_ERR "scsifront: Device already in use.\n");
++ scsi_device_put(sdev);
++ xenbus_printf(XBT_NIL, dev->nodename,
++ state_str, "%d", XenbusStateClosed);
++ } else {
++ scsi_add_device(info->host, chn, tgt, lun);
++ xenbus_printf(XBT_NIL, dev->nodename,
++ state_str, "%d", XenbusStateConnected);
++ }
++ }
++ break;
++ case VSCSIFRONT_OP_DEL_LUN:
++ if (device_state == XenbusStateClosing) {
++ sdev = scsi_device_lookup(info->host, chn, tgt, lun);
++ if (sdev) {
++ scsi_remove_device(sdev);
++ scsi_device_put(sdev);
++ xenbus_printf(XBT_NIL, dev->nodename,
++ state_str, "%d", XenbusStateClosed);
++ }
++ }
++ break;
++ default:
++ break;
++ }
++ }
++
++ kfree(dir);
++ return;
++}
++
++
++
++
++static void scsifront_backend_changed(struct xenbus_device *dev,
++ enum xenbus_state backend_state)
++{
++ struct vscsifrnt_info *info = dev->dev.driver_data;
++
++ DPRINTK("%p %u %u\n", dev, dev->state, backend_state);
++
++ switch (backend_state) {
++ case XenbusStateUnknown:
++ case XenbusStateInitialising:
++ case XenbusStateInitWait:
++ case XenbusStateClosed:
++ break;
++
++ case XenbusStateInitialised:
++ break;
++
++ case XenbusStateConnected:
++ if (xenbus_read_driver_state(dev->nodename) ==
++ XenbusStateInitialised) {
++ scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_ADD_LUN);
++ }
++
++ if (dev->state == XenbusStateConnected)
++ break;
++
++ xenbus_switch_state(dev, XenbusStateConnected);
++ break;
++
++ case XenbusStateClosing:
++ scsifront_disconnect(info);
++ break;
++
++ case XenbusStateReconfiguring:
++ scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_DEL_LUN);
++ xenbus_switch_state(dev, XenbusStateReconfiguring);
++ break;
++
++ case XenbusStateReconfigured:
++ scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_ADD_LUN);
++ xenbus_switch_state(dev, XenbusStateConnected);
++ break;
++ }
++}
++
++
++static struct xenbus_device_id scsifront_ids[] = {
++ { "vscsi" },
++ { "" }
++};
++
++
++static struct xenbus_driver scsifront_driver = {
++ .name = "vscsi",
++ .owner = THIS_MODULE,
++ .ids = scsifront_ids,
++ .probe = scsifront_probe,
++ .remove = scsifront_remove,
++/* .resume = scsifront_resume, */
++ .otherend_changed = scsifront_backend_changed,
++};
++
++int scsifront_xenbus_init(void)
++{
++ return xenbus_register_frontend(&scsifront_driver);
++}
++
++void scsifront_xenbus_unregister(void)
++{
++ xenbus_unregister_driver(&scsifront_driver);
++}
++
+Index: head-2008-11-25/drivers/xen/sfc_netback/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/Makefile 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,12 @@
++EXTRA_CFLAGS += -Idrivers/xen/sfc_netback -Idrivers/xen/sfc_netutil -Idrivers/xen/netback -Idrivers/net/sfc
++EXTRA_CFLAGS += -D__ci_driver__
++EXTRA_CFLAGS += -DEFX_USE_KCOMPAT
++EXTRA_CFLAGS += -Werror
++
++ifdef GCOV
++EXTRA_CFLAGS += -fprofile-arcs -ftest-coverage -DEFX_GCOV
++endif
++
++obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_BACKEND) := sfc_netback.o
++
++sfc_netback-objs := accel.o accel_fwd.o accel_msg.o accel_solarflare.o accel_xenbus.o accel_debugfs.o
+Index: head-2008-11-25/drivers/xen/sfc_netback/accel.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/accel.c 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,129 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include "accel.h"
++#include "accel_msg_iface.h"
++#include "accel_solarflare.h"
++
++#include <linux/notifier.h>
++
++#ifdef EFX_GCOV
++#include "gcov.h"
++#endif
++
++static int netback_accel_netdev_event(struct notifier_block *nb,
++ unsigned long event, void *ptr)
++{
++ struct net_device *net_dev = (struct net_device *)ptr;
++ struct netback_accel *bend;
++
++ if ((event == NETDEV_UP) || (event == NETDEV_DOWN)) {
++ mutex_lock(&bend_list_mutex);
++ bend = bend_list;
++ while (bend != NULL) {
++ mutex_lock(&bend->bend_mutex);
++ /*
++ * This happens when the shared pages have
++ * been unmapped, but the bend not yet removed
++ * from list
++ */
++ if (bend->shared_page == NULL)
++ goto next;
++
++ if (bend->net_dev->ifindex == net_dev->ifindex)
++ netback_accel_set_interface_state
++ (bend, event == NETDEV_UP);
++
++ next:
++ mutex_unlock(&bend->bend_mutex);
++ bend = bend->next_bend;
++ }
++ mutex_unlock(&bend_list_mutex);
++ }
++
++ return NOTIFY_DONE;
++}
++
++
++static struct notifier_block netback_accel_netdev_notifier = {
++ .notifier_call = netback_accel_netdev_event,
++};
++
++
++unsigned sfc_netback_max_pages = NETBACK_ACCEL_DEFAULT_MAX_BUF_PAGES;
++module_param_named(max_pages, sfc_netback_max_pages, uint, 0644);
++MODULE_PARM_DESC(max_pages,
++ "The number of buffer pages to enforce on each guest");
++
++/* Initialise subsystems need for the accelerated fast path */
++static int __init netback_accel_init(void)
++{
++ int rc = 0;
++
++#ifdef EFX_GCOV
++ gcov_provider_init(THIS_MODULE);
++#endif
++
++ rc = netback_accel_init_fwd();
++
++ if (rc == 0)
++ netback_accel_debugfs_init();
++
++ if (rc == 0)
++ rc = netback_accel_sf_init();
++
++ if (rc == 0)
++ rc = register_netdevice_notifier
++ (&netback_accel_netdev_notifier);
++
++ /*
++ * What if no device was found, shouldn't we clean up stuff
++ * we've allocated for acceleration subsystem?
++ */
++
++ return rc;
++}
++
++module_init(netback_accel_init);
++
++static void __exit netback_accel_exit(void)
++{
++ unregister_netdevice_notifier(&netback_accel_netdev_notifier);
++
++ netback_accel_sf_shutdown();
++
++ netback_accel_shutdown_bends();
++
++ netback_accel_debugfs_fini();
++
++ netback_accel_shutdown_fwd();
++
++#ifdef EFX_GCOV
++ gcov_provider_fini(THIS_MODULE);
++#endif
++}
++
++module_exit(netback_accel_exit);
++
++MODULE_LICENSE("GPL");
+Index: head-2008-11-25/drivers/xen/sfc_netback/accel.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/accel.h 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,393 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NETBACK_ACCEL_H
++#define NETBACK_ACCEL_H
++
++#include <linux/slab.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <linux/udp.h>
++#include <linux/in.h>
++#include <linux/netdevice.h>
++#include <linux/etherdevice.h>
++#include <linux/mutex.h>
++#include <linux/wait.h>
++
++#include <xen/xenbus.h>
++
++#include "accel_shared_fifo.h"
++#include "accel_msg_iface.h"
++#include "accel_util.h"
++
++/**************************************************************************
++ * Datatypes
++ **************************************************************************/
++
++#define NETBACK_ACCEL_DEFAULT_MAX_FILTERS (8)
++#define NETBACK_ACCEL_DEFAULT_MAX_MCASTS (8)
++#define NETBACK_ACCEL_DEFAULT_MAX_BUF_PAGES (384)
++/* Variable to store module parameter for max_buf_pages */
++extern unsigned sfc_netback_max_pages;
++
++#define NETBACK_ACCEL_STATS 1
++
++#if NETBACK_ACCEL_STATS
++#define NETBACK_ACCEL_STATS_OP(x) x
++#else
++#define NETBACK_ACCEL_STATS_OP(x)
++#endif
++
++/*! Statistics for a given backend */
++struct netback_accel_stats {
++ /*! Number of eventq wakeup events */
++ u64 evq_wakeups;
++ /*! Number of eventq timeout events */
++ u64 evq_timeouts;
++ /*! Number of filters used */
++ u32 num_filters;
++ /*! Number of buffer pages registered */
++ u32 num_buffer_pages;
++};
++
++
++/* Debug fs nodes for each of the above stats */
++struct netback_accel_dbfs {
++ struct dentry *evq_wakeups;
++ struct dentry *evq_timeouts;
++ struct dentry *num_filters;
++ struct dentry *num_buffer_pages;
++};
++
++
++/*! Resource limits for a given NIC */
++struct netback_accel_limits {
++ int max_filters; /*!< Max. number of filters to use. */
++ int max_mcasts; /*!< Max. number of mcast subscriptions */
++ int max_buf_pages; /*!< Max. number of pages of NIC buffers */
++};
++
++
++/*! The state for an instance of the back end driver. */
++struct netback_accel {
++ /*! mutex to protect this state */
++ struct mutex bend_mutex;
++
++ /*! Watches on xenstore */
++ struct xenbus_watch domu_accel_watch;
++ struct xenbus_watch config_accel_watch;
++
++ /*! Pointer to whatever device cookie ties us in to the hypervisor */
++ void *hdev_data;
++
++ /*! FIFO indices. Next page is msg FIFOs */
++ struct net_accel_shared_page *shared_page;
++
++ /*! Defer control message processing */
++ struct work_struct handle_msg;
++
++ /*! Identifies other end VM and interface.*/
++ int far_end;
++ int vif_num;
++
++ /*!< To unmap the shared pages */
++ void *sh_pages_unmap;
++
++ /* Resource tracking */
++ /*! Limits on H/W & Dom0 resources */
++ struct netback_accel_limits quotas;
++
++ /* Hardware resources */
++ /*! The H/W type of associated NIC */
++ enum net_accel_hw_type hw_type;
++ /*! State of allocation */
++ int hw_state;
++ /*! Index into ci_driver.nics[] for this interface */
++ int nic_index;
++ /*! How to set up the acceleration for this hardware */
++ int (*accel_setup)(struct netback_accel *);
++ /*! And how to stop it. */
++ void (*accel_shutdown)(struct netback_accel *);
++
++ /*! The physical/real net_dev for this interface */
++ struct net_device *net_dev;
++
++ /*! Magic pointer to locate state in fowarding table */
++ void *fwd_priv;
++
++ /*! Message FIFO */
++ sh_msg_fifo2 to_domU;
++ /*! Message FIFO */
++ sh_msg_fifo2 from_domU;
++
++ /*! General notification channel id */
++ int msg_channel;
++ /*! General notification channel irq */
++ int msg_channel_irq;
++
++ /*! Event channel id dedicated to network packet interrupts. */
++ int net_channel;
++ /*! Event channel irq dedicated to network packets interrupts */
++ int net_channel_irq;
++
++ /*! The MAC address the frontend goes by. */
++ u8 mac[ETH_ALEN];
++ /*! Driver name of associated NIC */
++ char *nicname;
++
++ /*! Array of pointers to buffer pages mapped */
++ grant_handle_t *buffer_maps;
++ u64 *buffer_addrs;
++ /*! Index into buffer_maps */
++ int buffer_maps_index;
++ /*! Max number of pages that domU is allowed/will request to map */
++ int max_pages;
++
++ /*! Pointer to hardware specific private area */
++ void *accel_hw_priv;
++
++ /*! Wait queue for changes in accelstate. */
++ wait_queue_head_t state_wait_queue;
++
++ /*! Current state of the frontend according to the xenbus
++ * watch. */
++ XenbusState frontend_state;
++
++ /*! Current state of this backend. */
++ XenbusState backend_state;
++
++ /*! Non-zero if the backend is being removed. */
++ int removing;
++
++ /*! Non-zero if the setup_vnic has been called. */
++ int vnic_is_setup;
++
++#if NETBACK_ACCEL_STATS
++ struct netback_accel_stats stats;
++#endif
++#if defined(CONFIG_DEBUG_FS)
++ char *dbfs_dir_name;
++ struct dentry *dbfs_dir;
++ struct netback_accel_dbfs dbfs;
++#endif
++
++ /*! List */
++ struct netback_accel *next_bend;
++};
++
++
++/*
++ * Values for netback_accel.hw_state. States of resource allocation
++ * we can go through
++ */
++/*! No hardware has yet been allocated. */
++#define NETBACK_ACCEL_RES_NONE (0)
++/*! Hardware has been allocated. */
++#define NETBACK_ACCEL_RES_ALLOC (1)
++#define NETBACK_ACCEL_RES_FILTER (2)
++#define NETBACK_ACCEL_RES_HWINFO (3)
++
++/*! Filtering specification. This assumes that for VNIC support we
++ * will always want wildcard entries, so only specifies the
++ * destination IP/port
++ */
++struct netback_accel_filter_spec {
++ /*! Internal, used to access efx_vi API */
++ void *filter_handle;
++
++ /*! Destination IP in network order */
++ u32 destip_be;
++ /*! Destination port in network order */
++ u16 destport_be;
++ /*! Mac address */
++ u8 mac[ETH_ALEN];
++ /*! TCP or UDP */
++ u8 proto;
++};
++
++
++/**************************************************************************
++ * From accel.c
++ **************************************************************************/
++
++/*! \brief Start up all the acceleration plugins
++ *
++ * \return 0 on success, an errno on failure
++ */
++extern int netback_accel_init_accel(void);
++
++/*! \brief Shut down all the acceleration plugins
++ */
++extern void netback_accel_shutdown_accel(void);
++
++
++/**************************************************************************
++ * From accel_fwd.c
++ **************************************************************************/
++
++/*! \brief Init the forwarding infrastructure
++ * \return 0 on success, or -ENOMEM if it couldn't get memory for the
++ * forward table
++ */
++extern int netback_accel_init_fwd(void);
++
++/*! \brief Shut down the forwarding and free memory. */
++extern void netback_accel_shutdown_fwd(void);
++
++/*! Initialise each nic port's fowarding table */
++extern void *netback_accel_init_fwd_port(void);
++extern void netback_accel_shutdown_fwd_port(void *fwd_priv);
++
++/*! \brief Add an entry to the forwarding table.
++ * \param mac : MAC address, used as hash key
++ * \param ctxt : value to associate with key (can be NULL, see
++ * netback_accel_fwd_set_context)
++ * \return 0 on success, -ENOMEM if table was full and could no grow it
++ */
++extern int netback_accel_fwd_add(const __u8 *mac, void *context,
++ void *fwd_priv);
++
++/*! \brief Remove an entry from the forwarding table.
++ * \param mac : the MAC address to remove
++ * \return nothing: it is not an error if the mac was not in the table
++ */
++extern void netback_accel_fwd_remove(const __u8 *mac, void *fwd_priv);
++
++/*! \brief Set the context pointer for an existing fwd table entry.
++ * \param mac : key that is already present in the table
++ * \param context : new value to associate with key
++ * \return 0 on success, -ENOENT if mac not present in table.
++ */
++extern int netback_accel_fwd_set_context(const __u8 *mac, void *context,
++ void *fwd_priv);
++
++/**************************************************************************
++ * From accel_msg.c
++ **************************************************************************/
++
++
++/*! \brief Send the start-of-day message that handshakes with the VNIC
++ * and tells it its MAC address.
++ *
++ * \param bend The back end driver data structure
++ * \param version The version of communication to use, e.g. NET_ACCEL_MSG_VERSION
++ */
++extern void netback_accel_msg_tx_hello(struct netback_accel *bend,
++ unsigned version);
++
++/*! \brief Send a "there's a new local mac address" message
++ *
++ * \param bend The back end driver data structure for the vnic to send
++ * the message to
++ * \param mac Pointer to the new mac address
++ */
++extern void netback_accel_msg_tx_new_localmac(struct netback_accel *bend,
++ const void *mac);
++
++/*! \brief Send a "a mac address that was local has gone away" message
++ *
++ * \param bend The back end driver data structure for the vnic to send
++ * the message to
++ * \param mac Pointer to the old mac address
++ */
++extern void netback_accel_msg_tx_old_localmac(struct netback_accel *bend,
++ const void *mac);
++
++extern void netback_accel_set_interface_state(struct netback_accel *bend,
++ int up);
++
++/*! \brief Process the message queue for a bend that has just
++ * interrupted.
++ *
++ * Demultiplexs an interrupt from the front end driver, taking
++ * messages from the fifo and taking appropriate action.
++ *
++ * \param bend The back end driver data structure
++ */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++extern void netback_accel_msg_rx_handler(struct work_struct *arg);
++#else
++extern void netback_accel_msg_rx_handler(void *bend_void);
++#endif
++
++/**************************************************************************
++ * From accel_xenbus.c
++ **************************************************************************/
++/*! List of all the bends currently in existence. */
++extern struct netback_accel *bend_list;
++extern struct mutex bend_list_mutex;
++
++/*! \brief Probe a new network interface. */
++extern int netback_accel_probe(struct xenbus_device *dev);
++
++/*! \brief Remove a network interface. */
++extern int netback_accel_remove(struct xenbus_device *dev);
++
++/*! \brief Shutdown all accelerator backends */
++extern void netback_accel_shutdown_bends(void);
++
++/*! \brief Initiate the xenbus state teardown handshake */
++extern void netback_accel_set_closing(struct netback_accel *bend);
++
++/**************************************************************************
++ * From accel_debugfs.c
++ **************************************************************************/
++/*! Global statistics */
++struct netback_accel_global_stats {
++ /*! Number of TX packets seen through driverlink */
++ u64 dl_tx_packets;
++ /*! Number of TX packets seen through driverlink we didn't like */
++ u64 dl_tx_bad_packets;
++ /*! Number of RX packets seen through driverlink */
++ u64 dl_rx_packets;
++ /*! Number of mac addresses we are forwarding to */
++ u32 num_fwds;
++};
++
++/*! Debug fs entries for each of the above stats */
++struct netback_accel_global_dbfs {
++ struct dentry *dl_tx_packets;
++ struct dentry *dl_tx_bad_packets;
++ struct dentry *dl_rx_packets;
++ struct dentry *num_fwds;
++};
++
++#if NETBACK_ACCEL_STATS
++extern struct netback_accel_global_stats global_stats;
++#endif
++
++/*! \brief Initialise the debugfs root and populate with global stats */
++extern void netback_accel_debugfs_init(void);
++
++/*! \brief Remove our debugfs root directory */
++extern void netback_accel_debugfs_fini(void);
++
++/*! \brief Add per-bend statistics to debug fs */
++extern int netback_accel_debugfs_create(struct netback_accel *bend);
++/*! \brief Remove per-bend statistics from debug fs */
++extern int netback_accel_debugfs_remove(struct netback_accel *bend);
++
++#endif /* NETBACK_ACCEL_H */
++
++
+Index: head-2008-11-25/drivers/xen/sfc_netback/accel_debugfs.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/accel_debugfs.c 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,148 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/fs.h>
++#include <linux/debugfs.h>
++
++#include "accel.h"
++
++#if defined(CONFIG_DEBUG_FS)
++static struct dentry *sfc_debugfs_root = NULL;
++#endif
++
++#if NETBACK_ACCEL_STATS
++struct netback_accel_global_stats global_stats;
++#if defined(CONFIG_DEBUG_FS)
++static struct netback_accel_global_dbfs global_dbfs;
++#endif
++#endif
++
++void netback_accel_debugfs_init(void)
++{
++#if defined(CONFIG_DEBUG_FS)
++ sfc_debugfs_root = debugfs_create_dir("sfc_netback", NULL);
++ if (sfc_debugfs_root == NULL)
++ return;
++
++ global_dbfs.num_fwds = debugfs_create_u32
++ ("num_fwds", S_IRUSR | S_IRGRP | S_IROTH,
++ sfc_debugfs_root, &global_stats.num_fwds);
++ global_dbfs.dl_tx_packets = debugfs_create_u64
++ ("dl_tx_packets", S_IRUSR | S_IRGRP | S_IROTH,
++ sfc_debugfs_root, &global_stats.dl_tx_packets);
++ global_dbfs.dl_rx_packets = debugfs_create_u64
++ ("dl_rx_packets", S_IRUSR | S_IRGRP | S_IROTH,
++ sfc_debugfs_root, &global_stats.dl_rx_packets);
++ global_dbfs.dl_tx_bad_packets = debugfs_create_u64
++ ("dl_tx_bad_packets", S_IRUSR | S_IRGRP | S_IROTH,
++ sfc_debugfs_root, &global_stats.dl_tx_bad_packets);
++#endif
++}
++
++
++void netback_accel_debugfs_fini(void)
++{
++#if defined(CONFIG_DEBUG_FS)
++ debugfs_remove(global_dbfs.num_fwds);
++ debugfs_remove(global_dbfs.dl_tx_packets);
++ debugfs_remove(global_dbfs.dl_rx_packets);
++ debugfs_remove(global_dbfs.dl_tx_bad_packets);
++
++ debugfs_remove(sfc_debugfs_root);
++#endif
++}
++
++
++int netback_accel_debugfs_create(struct netback_accel *bend)
++{
++#if defined(CONFIG_DEBUG_FS)
++ /* Smallest length is 7 (vif0.0\n) */
++ int length = 7, temp;
++
++ if (sfc_debugfs_root == NULL)
++ return -ENOENT;
++
++ /* Work out length of string representation of far_end and vif_num */
++ temp = bend->far_end;
++ while (temp > 9) {
++ length++;
++ temp = temp / 10;
++ }
++ temp = bend->vif_num;
++ while (temp > 9) {
++ length++;
++ temp = temp / 10;
++ }
++
++ bend->dbfs_dir_name = kmalloc(length, GFP_KERNEL);
++ if (bend->dbfs_dir_name == NULL)
++ return -ENOMEM;
++ sprintf(bend->dbfs_dir_name, "vif%d.%d", bend->far_end, bend->vif_num);
++
++ bend->dbfs_dir = debugfs_create_dir(bend->dbfs_dir_name,
++ sfc_debugfs_root);
++ if (bend->dbfs_dir == NULL) {
++ kfree(bend->dbfs_dir_name);
++ return -ENOMEM;
++ }
++
++#if NETBACK_ACCEL_STATS
++ bend->dbfs.evq_wakeups = debugfs_create_u64
++ ("evq_wakeups", S_IRUSR | S_IRGRP | S_IROTH,
++ bend->dbfs_dir, &bend->stats.evq_wakeups);
++ bend->dbfs.evq_timeouts = debugfs_create_u64
++ ("evq_timeouts", S_IRUSR | S_IRGRP | S_IROTH,
++ bend->dbfs_dir, &bend->stats.evq_timeouts);
++ bend->dbfs.num_filters = debugfs_create_u32
++ ("num_filters", S_IRUSR | S_IRGRP | S_IROTH,
++ bend->dbfs_dir, &bend->stats.num_filters);
++ bend->dbfs.num_buffer_pages = debugfs_create_u32
++ ("num_buffer_pages", S_IRUSR | S_IRGRP | S_IROTH,
++ bend->dbfs_dir, &bend->stats.num_buffer_pages);
++#endif
++#endif
++ return 0;
++}
++
++
++int netback_accel_debugfs_remove(struct netback_accel *bend)
++{
++#if defined(CONFIG_DEBUG_FS)
++ if (bend->dbfs_dir != NULL) {
++#if NETBACK_ACCEL_STATS
++ debugfs_remove(bend->dbfs.evq_wakeups);
++ debugfs_remove(bend->dbfs.evq_timeouts);
++ debugfs_remove(bend->dbfs.num_filters);
++ debugfs_remove(bend->dbfs.num_buffer_pages);
++#endif
++ debugfs_remove(bend->dbfs_dir);
++ }
++
++ if (bend->dbfs_dir_name)
++ kfree(bend->dbfs_dir_name);
++#endif
++ return 0;
++}
++
++
+Index: head-2008-11-25/drivers/xen/sfc_netback/accel_fwd.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/accel_fwd.c 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,420 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include "accel.h"
++#include "accel_cuckoo_hash.h"
++#include "accel_util.h"
++#include "accel_solarflare.h"
++
++#include "driverlink_api.h"
++
++#include <linux/if_arp.h>
++#include <linux/skbuff.h>
++#include <linux/list.h>
++
++/* State stored in the forward table */
++struct fwd_struct {
++ struct list_head link; /* Forms list */
++ void * context;
++ __u8 valid;
++ __u8 mac[ETH_ALEN];
++};
++
++/* Max value we support */
++#define NUM_FWDS_BITS 8
++#define NUM_FWDS (1 << NUM_FWDS_BITS)
++#define FWD_MASK (NUM_FWDS - 1)
++
++struct port_fwd {
++ /* Make a list */
++ struct list_head link;
++ /* Hash table to store the fwd_structs */
++ cuckoo_hash_table fwd_hash_table;
++ /* The array of fwd_structs */
++ struct fwd_struct *fwd_array;
++ /* Linked list of entries in use. */
++ struct list_head fwd_list;
++ /* Could do something clever with a reader/writer lock. */
++ spinlock_t fwd_lock;
++ /* Make find_free_entry() a bit faster by caching this */
++ int last_free_index;
++};
++
++/*
++ * This is unlocked as it's only called from dl probe and remove,
++ * which are themselves synchronised. Could get rid of it entirely as
++ * it's never iterated, but useful for debug
++ */
++static struct list_head port_fwds;
++
++
++/* Search the fwd_array for an unused entry */
++static int fwd_find_free_entry(struct port_fwd *fwd_set)
++{
++ int index = fwd_set->last_free_index;
++
++ do {
++ if (!fwd_set->fwd_array[index].valid) {
++ fwd_set->last_free_index = index;
++ return index;
++ }
++ index++;
++ if (index >= NUM_FWDS)
++ index = 0;
++ } while (index != fwd_set->last_free_index);
++
++ return -ENOMEM;
++}
++
++
++/* Look up a MAC in the hash table. Caller should hold table lock. */
++static inline struct fwd_struct *fwd_find_entry(const __u8 *mac,
++ struct port_fwd *fwd_set)
++{
++ cuckoo_hash_value value;
++ cuckoo_hash_mac_key key = cuckoo_mac_to_key(mac);
++
++ if (cuckoo_hash_lookup(&fwd_set->fwd_hash_table,
++ (cuckoo_hash_key *)(&key),
++ &value)) {
++ struct fwd_struct *fwd = &fwd_set->fwd_array[value];
++ DPRINTK_ON(memcmp(fwd->mac, mac, ETH_ALEN) != 0);
++ return fwd;
++ }
++
++ return NULL;
++}
++
++
++/* Initialise each nic port's fowarding table */
++void *netback_accel_init_fwd_port(void)
++{
++ struct port_fwd *fwd_set;
++
++ fwd_set = kzalloc(sizeof(struct port_fwd), GFP_KERNEL);
++ if (fwd_set == NULL) {
++ return NULL;
++ }
++
++ spin_lock_init(&fwd_set->fwd_lock);
++
++ fwd_set->fwd_array = kzalloc(sizeof (struct fwd_struct) * NUM_FWDS,
++ GFP_KERNEL);
++ if (fwd_set->fwd_array == NULL) {
++ kfree(fwd_set);
++ return NULL;
++ }
++
++ if (cuckoo_hash_init(&fwd_set->fwd_hash_table, NUM_FWDS_BITS, 8) != 0) {
++ kfree(fwd_set->fwd_array);
++ kfree(fwd_set);
++ return NULL;
++ }
++
++ INIT_LIST_HEAD(&fwd_set->fwd_list);
++
++ list_add(&fwd_set->link, &port_fwds);
++
++ return fwd_set;
++}
++
++
++void netback_accel_shutdown_fwd_port(void *fwd_priv)
++{
++ struct port_fwd *fwd_set = (struct port_fwd *)fwd_priv;
++
++ BUG_ON(fwd_priv == NULL);
++
++ BUG_ON(list_empty(&port_fwds));
++ list_del(&fwd_set->link);
++
++ BUG_ON(!list_empty(&fwd_set->fwd_list));
++
++ cuckoo_hash_destroy(&fwd_set->fwd_hash_table);
++ kfree(fwd_set->fwd_array);
++ kfree(fwd_set);
++}
++
++
++int netback_accel_init_fwd()
++{
++ INIT_LIST_HEAD(&port_fwds);
++ return 0;
++}
++
++
++void netback_accel_shutdown_fwd()
++{
++ BUG_ON(!list_empty(&port_fwds));
++}
++
++
++/*
++ * Add an entry to the forwarding table. Returns -ENOMEM if no
++ * space.
++ */
++int netback_accel_fwd_add(const __u8 *mac, void *context, void *fwd_priv)
++{
++ struct fwd_struct *fwd;
++ int rc = 0, index;
++ unsigned long flags;
++ cuckoo_hash_mac_key key = cuckoo_mac_to_key(mac);
++ struct port_fwd *fwd_set = (struct port_fwd *)fwd_priv;
++
++ BUG_ON(fwd_priv == NULL);
++
++ DPRINTK("Adding mac " MAC_FMT "\n", MAC_ARG(mac));
++
++ spin_lock_irqsave(&fwd_set->fwd_lock, flags);
++
++ if ((rc = fwd_find_free_entry(fwd_set)) < 0 ) {
++ spin_unlock_irqrestore(&fwd_set->fwd_lock, flags);
++ return rc;
++ }
++
++ index = rc;
++
++ /* Shouldn't already be in the table */
++ if (cuckoo_hash_lookup(&fwd_set->fwd_hash_table,
++ (cuckoo_hash_key *)(&key), &rc) != 0) {
++ spin_unlock_irqrestore(&fwd_set->fwd_lock, flags);
++ EPRINTK("MAC address " MAC_FMT " already accelerated.\n",
++ MAC_ARG(mac));
++ return -EEXIST;
++ }
++
++ if ((rc = cuckoo_hash_add(&fwd_set->fwd_hash_table,
++ (cuckoo_hash_key *)(&key), index, 1)) == 0) {
++ fwd = &fwd_set->fwd_array[index];
++ fwd->valid = 1;
++ fwd->context = context;
++ memcpy(fwd->mac, mac, ETH_ALEN);
++ list_add(&fwd->link, &fwd_set->fwd_list);
++ NETBACK_ACCEL_STATS_OP(global_stats.num_fwds++);
++ }
++
++ spin_unlock_irqrestore(&fwd_set->fwd_lock, flags);
++
++ /*
++ * No need to tell frontend that this mac address is local -
++ * it should auto-discover through packets on fastpath what is
++ * local and what is not, and just being on same server
++ * doesn't make it local (it could be on a different
++ * bridge)
++ */
++
++ return rc;
++}
++
++
++/* remove an entry from the forwarding tables. */
++void netback_accel_fwd_remove(const __u8 *mac, void *fwd_priv)
++{
++ struct fwd_struct *fwd;
++ unsigned long flags;
++ cuckoo_hash_mac_key key = cuckoo_mac_to_key(mac);
++ struct port_fwd *fwd_set = (struct port_fwd *)fwd_priv;
++
++ DPRINTK("Removing mac " MAC_FMT "\n", MAC_ARG(mac));
++
++ BUG_ON(fwd_priv == NULL);
++
++ spin_lock_irqsave(&fwd_set->fwd_lock, flags);
++
++ fwd = fwd_find_entry(mac, fwd_set);
++ if (fwd != NULL) {
++ BUG_ON(list_empty(&fwd_set->fwd_list));
++ list_del(&fwd->link);
++
++ fwd->valid = 0;
++ cuckoo_hash_remove(&fwd_set->fwd_hash_table,
++ (cuckoo_hash_key *)(&key));
++ NETBACK_ACCEL_STATS_OP(global_stats.num_fwds--);
++ }
++ spin_unlock_irqrestore(&fwd_set->fwd_lock, flags);
++
++ /*
++ * No need to tell frontend that this is no longer present -
++ * the frontend is currently only interested in remote
++ * addresses and it works these out (mostly) by itself
++ */
++}
++
++
++/* Set the context pointer for a hash table entry. */
++int netback_accel_fwd_set_context(const __u8 *mac, void *context,
++ void *fwd_priv)
++{
++ struct fwd_struct *fwd;
++ unsigned long flags;
++ int rc = -ENOENT;
++ struct port_fwd *fwd_set = (struct port_fwd *)fwd_priv;
++
++ BUG_ON(fwd_priv == NULL);
++
++ spin_lock_irqsave(&fwd_set->fwd_lock, flags);
++ fwd = fwd_find_entry(mac, fwd_set);
++ if (fwd != NULL) {
++ fwd->context = context;
++ rc = 0;
++ }
++ spin_unlock_irqrestore(&fwd_set->fwd_lock, flags);
++ return rc;
++}
++
++
++/**************************************************************************
++ * Process a received packet
++ **************************************************************************/
++
++/*
++ * Returns whether or not we have a match in our forward table for the
++ * this skb. Must be called with appropriate fwd_lock already held
++ */
++static struct netback_accel *for_a_vnic(struct netback_pkt_buf *skb,
++ struct port_fwd *fwd_set)
++{
++ struct fwd_struct *fwd;
++ struct netback_accel *retval = NULL;
++
++ fwd = fwd_find_entry(skb->mac.raw, fwd_set);
++ if (fwd != NULL)
++ retval = fwd->context;
++ return retval;
++}
++
++
++static inline int packet_is_arp_reply(struct sk_buff *skb)
++{
++ return skb->protocol == ntohs(ETH_P_ARP)
++ && skb->nh.arph->ar_op == ntohs(ARPOP_REPLY);
++}
++
++
++static inline void hdr_to_filt(struct ethhdr *ethhdr, struct iphdr *ip,
++ struct netback_accel_filter_spec *spec)
++{
++ spec->proto = ip->protocol;
++ spec->destip_be = ip->daddr;
++ memcpy(spec->mac, ethhdr->h_source, ETH_ALEN);
++
++ if (ip->protocol == IPPROTO_TCP) {
++ struct tcphdr *tcp = (struct tcphdr *)((char *)ip + 4 * ip->ihl);
++ spec->destport_be = tcp->dest;
++ } else {
++ struct udphdr *udp = (struct udphdr *)((char *)ip + 4 * ip->ihl);
++ EPRINTK_ON(ip->protocol != IPPROTO_UDP);
++ spec->destport_be = udp->dest;
++ }
++}
++
++
++static inline int netback_accel_can_filter(struct netback_pkt_buf *skb)
++{
++ return (skb->protocol == htons(ETH_P_IP) &&
++ ((skb->nh.iph->protocol == IPPROTO_TCP) ||
++ (skb->nh.iph->protocol == IPPROTO_UDP)));
++}
++
++
++static inline void netback_accel_filter_packet(struct netback_accel *bend,
++ struct netback_pkt_buf *skb)
++{
++ struct netback_accel_filter_spec fs;
++ struct ethhdr *eh = (struct ethhdr *)(skb->mac.raw);
++
++ hdr_to_filt(eh, skb->nh.iph, &fs);
++
++ netback_accel_filter_check_add(bend, &fs);
++}
++
++
++/*
++ * Receive a packet and do something appropriate with it. Return true
++ * to take exclusive ownership of the packet. This is verging on
++ * solarflare specific
++ */
++void netback_accel_rx_packet(struct netback_pkt_buf *skb, void *fwd_priv)
++{
++ struct netback_accel *bend;
++ struct port_fwd *fwd_set = (struct port_fwd *)fwd_priv;
++ unsigned long flags;
++
++ BUG_ON(fwd_priv == NULL);
++
++ /* Checking for bcast is cheaper so do that first */
++ if (is_broadcast_ether_addr(skb->mac.raw)) {
++ /* pass through the slow path by not claiming ownership */
++ return;
++ } else if (is_multicast_ether_addr(skb->mac.raw)) {
++ /* pass through the slow path by not claiming ownership */
++ return;
++ } else {
++ /* It is unicast */
++ spin_lock_irqsave(&fwd_set->fwd_lock, flags);
++ /* We insert filter to pass it off to a VNIC */
++ if ((bend = for_a_vnic(skb, fwd_set)) != NULL)
++ if (netback_accel_can_filter(skb))
++ netback_accel_filter_packet(bend, skb);
++ spin_unlock_irqrestore(&fwd_set->fwd_lock, flags);
++ }
++ return;
++}
++
++
++void netback_accel_tx_packet(struct sk_buff *skb, void *fwd_priv)
++{
++ __u8 *mac;
++ unsigned long flags;
++ struct port_fwd *fwd_set = (struct port_fwd *)fwd_priv;
++ struct fwd_struct *fwd;
++
++ BUG_ON(fwd_priv == NULL);
++
++ if (is_broadcast_ether_addr(skb->mac.raw) && packet_is_arp_reply(skb)) {
++ /*
++ * update our fast path forwarding to reflect this
++ * gratuitous ARP
++ */
++ mac = skb->mac.raw+ETH_ALEN;
++
++ DPRINTK("%s: found gratuitous ARP for " MAC_FMT "\n",
++ __FUNCTION__, MAC_ARG(mac));
++
++ spin_lock_irqsave(&fwd_set->fwd_lock, flags);
++ /*
++ * Might not be local, but let's tell them all it is,
++ * and they can restore the fastpath if they continue
++ * to get packets that way
++ */
++ list_for_each_entry(fwd, &fwd_set->fwd_list, link) {
++ struct netback_accel *bend = fwd->context;
++ if (bend != NULL)
++ netback_accel_msg_tx_new_localmac(bend, mac);
++ }
++
++ spin_unlock_irqrestore(&fwd_set->fwd_lock, flags);
++ }
++ return;
++}
+Index: head-2008-11-25/drivers/xen/sfc_netback/accel_msg.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/accel_msg.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,392 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <xen/evtchn.h>
++
++#include "accel.h"
++#include "accel_msg_iface.h"
++#include "accel_util.h"
++#include "accel_solarflare.h"
++
++/* Send a HELLO to front end to start things off */
++void netback_accel_msg_tx_hello(struct netback_accel *bend, unsigned version)
++{
++ unsigned long lock_state;
++ struct net_accel_msg *msg =
++ net_accel_msg_start_send(bend->shared_page,
++ &bend->to_domU, &lock_state);
++ /* The queue _cannot_ be full, we're the first users. */
++ EPRINTK_ON(msg == NULL);
++
++ if (msg != NULL) {
++ net_accel_msg_init(msg, NET_ACCEL_MSG_HELLO);
++ msg->u.hello.version = version;
++ msg->u.hello.max_pages = bend->quotas.max_buf_pages;
++ VPRINTK("Sending hello to channel %d\n", bend->msg_channel);
++ net_accel_msg_complete_send_notify(bend->shared_page,
++ &bend->to_domU,
++ &lock_state,
++ bend->msg_channel_irq);
++ }
++}
++
++/* Send a local mac message to vnic */
++static void netback_accel_msg_tx_localmac(struct netback_accel *bend,
++ int type, const void *mac)
++{
++ unsigned long lock_state;
++ struct net_accel_msg *msg;
++
++ BUG_ON(bend == NULL || mac == NULL);
++
++ VPRINTK("Sending local mac message: " MAC_FMT "\n",
++ MAC_ARG((const char *)mac));
++
++ msg = net_accel_msg_start_send(bend->shared_page, &bend->to_domU,
++ &lock_state);
++
++ if (msg != NULL) {
++ net_accel_msg_init(msg, NET_ACCEL_MSG_LOCALMAC);
++ msg->u.localmac.flags = type;
++ memcpy(msg->u.localmac.mac, mac, ETH_ALEN);
++ net_accel_msg_complete_send_notify(bend->shared_page,
++ &bend->to_domU,
++ &lock_state,
++ bend->msg_channel_irq);
++ } else {
++ /*
++ * TODO if this happens we may leave a domU
++ * fastpathing packets when they should be delivered
++ * locally. Solution is get domU to timeout entries
++ * in its fastpath lookup table when it receives no RX
++ * traffic
++ */
++ EPRINTK("%s: saw full queue, may need ARP timer to recover\n",
++ __FUNCTION__);
++ }
++}
++
++/* Send an add local mac message to vnic */
++void netback_accel_msg_tx_new_localmac(struct netback_accel *bend,
++ const void *mac)
++{
++ netback_accel_msg_tx_localmac(bend, NET_ACCEL_MSG_ADD, mac);
++}
++
++
++static int netback_accel_msg_rx_buffer_map(struct netback_accel *bend,
++ struct net_accel_msg *msg)
++{
++ int log2_pages, rc;
++
++ /* Can only allocate in power of two */
++ log2_pages = log2_ge(msg->u.mapbufs.pages, 0);
++ if (msg->u.mapbufs.pages != pow2(log2_pages)) {
++ EPRINTK("%s: Can only alloc bufs in power of 2 sizes (%d)\n",
++ __FUNCTION__, msg->u.mapbufs.pages);
++ rc = -EINVAL;
++ goto err_out;
++ }
++
++ /*
++ * Sanity. Assumes NET_ACCEL_MSG_MAX_PAGE_REQ is same for
++ * both directions/domains
++ */
++ if (msg->u.mapbufs.pages > NET_ACCEL_MSG_MAX_PAGE_REQ) {
++ EPRINTK("%s: too many pages in a single message: %d %d\n",
++ __FUNCTION__, msg->u.mapbufs.pages,
++ NET_ACCEL_MSG_MAX_PAGE_REQ);
++ rc = -EINVAL;
++ goto err_out;
++ }
++
++ if ((rc = netback_accel_add_buffers(bend, msg->u.mapbufs.pages,
++ log2_pages, msg->u.mapbufs.grants,
++ &msg->u.mapbufs.buf)) < 0) {
++ goto err_out;
++ }
++
++ msg->id |= NET_ACCEL_MSG_REPLY;
++
++ return 0;
++
++ err_out:
++ EPRINTK("%s: err_out\n", __FUNCTION__);
++ msg->id |= NET_ACCEL_MSG_ERROR | NET_ACCEL_MSG_REPLY;
++ return rc;
++}
++
++
++/* Hint from frontend that one of our filters is out of date */
++static int netback_accel_process_fastpath(struct netback_accel *bend,
++ struct net_accel_msg *msg)
++{
++ struct netback_accel_filter_spec spec;
++
++ if (msg->u.fastpath.flags & NET_ACCEL_MSG_REMOVE) {
++ /*
++ * Would be nice to BUG() this but would leave us
++ * vulnerable to naughty frontend
++ */
++ EPRINTK_ON(msg->u.fastpath.flags & NET_ACCEL_MSG_ADD);
++
++ memcpy(spec.mac, msg->u.fastpath.mac, ETH_ALEN);
++ spec.destport_be = msg->u.fastpath.port;
++ spec.destip_be = msg->u.fastpath.ip;
++ spec.proto = msg->u.fastpath.proto;
++
++ netback_accel_filter_remove_spec(bend, &spec);
++ }
++
++ return 0;
++}
++
++
++/* Flow control for message queues */
++inline void set_queue_not_full(struct netback_accel *bend)
++{
++ if (!test_and_set_bit(NET_ACCEL_MSG_AFLAGS_QUEUEUNOTFULL_B,
++ (unsigned long *)&bend->shared_page->aflags))
++ notify_remote_via_irq(bend->msg_channel_irq);
++ else
++ VPRINTK("queue not full bit already set, not signalling\n");
++}
++
++
++/* Flow control for message queues */
++inline void set_queue_full(struct netback_accel *bend)
++{
++ if (!test_and_set_bit(NET_ACCEL_MSG_AFLAGS_QUEUE0FULL_B,
++ (unsigned long *)&bend->shared_page->aflags))
++ notify_remote_via_irq(bend->msg_channel_irq);
++ else
++ VPRINTK("queue full bit already set, not signalling\n");
++}
++
++
++void netback_accel_set_interface_state(struct netback_accel *bend, int up)
++{
++ bend->shared_page->net_dev_up = up;
++ if (!test_and_set_bit(NET_ACCEL_MSG_AFLAGS_NETUPDOWN_B,
++ (unsigned long *)&bend->shared_page->aflags))
++ notify_remote_via_irq(bend->msg_channel_irq);
++ else
++ VPRINTK("interface up/down bit already set, not signalling\n");
++}
++
++
++static int check_rx_hello_version(unsigned version)
++{
++ /* Should only happen if there's been a version mismatch */
++ BUG_ON(version == NET_ACCEL_MSG_VERSION);
++
++ if (version > NET_ACCEL_MSG_VERSION) {
++ /* Newer protocol, we must refuse */
++ return -EPROTO;
++ }
++
++ if (version < NET_ACCEL_MSG_VERSION) {
++ /*
++ * We are newer, so have discretion to accept if we
++ * wish. For now however, just reject
++ */
++ return -EPROTO;
++ }
++
++ return -EINVAL;
++}
++
++
++static int process_rx_msg(struct netback_accel *bend,
++ struct net_accel_msg *msg)
++{
++ int err = 0;
++
++ switch (msg->id) {
++ case NET_ACCEL_MSG_REPLY | NET_ACCEL_MSG_HELLO:
++ /* Reply to a HELLO; mark ourselves as connected */
++ DPRINTK("got Hello reply, version %.8x\n",
++ msg->u.hello.version);
++
++ /*
++ * Check that we've not successfully done this
++ * already. NB no check at the moment that this reply
++ * comes after we've actually sent a HELLO as that's
++ * not possible with the current code structure
++ */
++ if (bend->hw_state != NETBACK_ACCEL_RES_NONE)
++ return -EPROTO;
++
++ /* Store max_pages for accel_setup */
++ if (msg->u.hello.max_pages > bend->quotas.max_buf_pages) {
++ EPRINTK("More pages than quota allows (%d > %d)\n",
++ msg->u.hello.max_pages,
++ bend->quotas.max_buf_pages);
++ /* Force it down to the quota */
++ msg->u.hello.max_pages = bend->quotas.max_buf_pages;
++ }
++ bend->max_pages = msg->u.hello.max_pages;
++
++ /* Set up the hardware visible to the other end */
++ err = bend->accel_setup(bend);
++ if (err) {
++ /* This is fatal */
++ DPRINTK("Hello gave accel_setup error %d\n", err);
++ netback_accel_set_closing(bend);
++ } else {
++ /*
++ * Now add the context so that packet
++ * forwarding will commence
++ */
++ netback_accel_fwd_set_context(bend->mac, bend,
++ bend->fwd_priv);
++ }
++ break;
++ case NET_ACCEL_MSG_REPLY | NET_ACCEL_MSG_HELLO | NET_ACCEL_MSG_ERROR:
++ EPRINTK("got Hello error, versions us:%.8x them:%.8x\n",
++ NET_ACCEL_MSG_VERSION, msg->u.hello.version);
++
++ if (bend->hw_state != NETBACK_ACCEL_RES_NONE)
++ return -EPROTO;
++
++ if (msg->u.hello.version != NET_ACCEL_MSG_VERSION) {
++ /* Error is due to version mismatch */
++ err = check_rx_hello_version(msg->u.hello.version);
++ if (err == 0) {
++ /*
++ * It's OK to be compatible, send
++ * another hello with compatible version
++ */
++ netback_accel_msg_tx_hello
++ (bend, msg->u.hello.version);
++ } else {
++ /*
++ * Tell frontend that we're not going to
++ * send another HELLO by going to Closing.
++ */
++ netback_accel_set_closing(bend);
++ }
++ }
++ break;
++ case NET_ACCEL_MSG_MAPBUF:
++ VPRINTK("Got mapped buffers request %d\n",
++ msg->u.mapbufs.reqid);
++
++ if (bend->hw_state == NETBACK_ACCEL_RES_NONE)
++ return -EPROTO;
++
++ /*
++ * Frontend wants a buffer table entry for the
++ * supplied pages
++ */
++ err = netback_accel_msg_rx_buffer_map(bend, msg);
++ if (net_accel_msg_reply_notify(bend->shared_page,
++ bend->msg_channel_irq,
++ &bend->to_domU, msg)) {
++ /*
++ * This is fatal as we can't tell the frontend
++ * about the problem through the message
++ * queue, and so would otherwise stalemate
++ */
++ netback_accel_set_closing(bend);
++ }
++ break;
++ case NET_ACCEL_MSG_FASTPATH:
++ DPRINTK("Got fastpath request\n");
++
++ if (bend->hw_state == NETBACK_ACCEL_RES_NONE)
++ return -EPROTO;
++
++ err = netback_accel_process_fastpath(bend, msg);
++ break;
++ default:
++ EPRINTK("Huh? Message code is %x\n", msg->id);
++ err = -EPROTO;
++ break;
++ }
++ return err;
++}
++
++
++/* Demultiplex an IRQ from the frontend driver. */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++void netback_accel_msg_rx_handler(struct work_struct *arg)
++#else
++void netback_accel_msg_rx_handler(void *bend_void)
++#endif
++{
++ struct net_accel_msg msg;
++ int err, queue_was_full = 0;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ struct netback_accel *bend =
++ container_of(arg, struct netback_accel, handle_msg);
++#else
++ struct netback_accel *bend = (struct netback_accel *)bend_void;
++#endif
++
++ mutex_lock(&bend->bend_mutex);
++
++ /*
++ * This happens when the shared pages have been unmapped, but
++ * the workqueue not flushed yet
++ */
++ if (bend->shared_page == NULL)
++ goto done;
++
++ if ((bend->shared_page->aflags &
++ NET_ACCEL_MSG_AFLAGS_TO_DOM0_MASK) != 0) {
++ if (bend->shared_page->aflags &
++ NET_ACCEL_MSG_AFLAGS_QUEUE0NOTFULL) {
++ /* We've been told there may now be space. */
++ clear_bit(NET_ACCEL_MSG_AFLAGS_QUEUE0NOTFULL_B,
++ (unsigned long *)&bend->shared_page->aflags);
++ }
++
++ if (bend->shared_page->aflags &
++ NET_ACCEL_MSG_AFLAGS_QUEUEUFULL) {
++ clear_bit(NET_ACCEL_MSG_AFLAGS_QUEUEUFULL_B,
++ (unsigned long *)&bend->shared_page->aflags);
++ queue_was_full = 1;
++ }
++ }
++
++ while ((err = net_accel_msg_recv(bend->shared_page, &bend->from_domU,
++ &msg)) == 0) {
++ err = process_rx_msg(bend, &msg);
++
++ if (err != 0) {
++ EPRINTK("%s: Error %d\n", __FUNCTION__, err);
++ goto err;
++ }
++ }
++
++ err:
++ /* There will be space now if we can make any. */
++ if (queue_was_full)
++ set_queue_not_full(bend);
++ done:
++ mutex_unlock(&bend->bend_mutex);
++
++ return;
++}
+Index: head-2008-11-25/drivers/xen/sfc_netback/accel_solarflare.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/accel_solarflare.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,1253 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include "common.h"
++
++#include "accel.h"
++#include "accel_solarflare.h"
++#include "accel_msg_iface.h"
++#include "accel_util.h"
++
++#include "accel_cuckoo_hash.h"
++
++#include "ci/driver/resource/efx_vi.h"
++
++#include "ci/efrm/nic_table.h"
++#include "ci/efhw/public.h"
++
++#include <xen/evtchn.h>
++#include <xen/driver_util.h>
++#include <linux/list.h>
++#include <linux/mutex.h>
++
++#include "driverlink_api.h"
++
++#define SF_XEN_RX_USR_BUF_SIZE 2048
++
++struct falcon_bend_accel_priv {
++ struct efx_vi_state *efx_vih;
++
++ /*! Array of pointers to dma_map state, used so VNIC can
++ * request their removal in a single message
++ */
++ struct efx_vi_dma_map_state **dma_maps;
++ /*! Index into dma_maps */
++ int dma_maps_index;
++
++ /*! Serialises access to filters */
++ spinlock_t filter_lock;
++ /*! Bitmap of which filters are free */
++ unsigned long free_filters;
++ /*! Used for index normalisation */
++ u32 filter_idx_mask;
++ struct netback_accel_filter_spec *fspecs;
++ cuckoo_hash_table filter_hash_table;
++
++ u32 txdmaq_gnt;
++ u32 rxdmaq_gnt;
++ u32 doorbell_gnt;
++ u32 evq_rptr_gnt;
++ u32 evq_mem_gnts[EF_HW_FALCON_EVQ_PAGES];
++ u32 evq_npages;
++};
++
++/* Forward declaration */
++static int netback_accel_filter_init(struct netback_accel *);
++static void netback_accel_filter_shutdown(struct netback_accel *);
++
++/**************************************************************************
++ *
++ * Driverlink stuff
++ *
++ **************************************************************************/
++
++struct driverlink_port {
++ struct list_head link;
++ enum net_accel_hw_type type;
++ struct net_device *net_dev;
++ struct efx_dl_device *efx_dl_dev;
++ int nic_index;
++ void *fwd_priv;
++};
++
++static struct list_head dl_ports;
++
++/* This mutex protects global state, such as the dl_ports list */
++DEFINE_MUTEX(accel_mutex);
++
++static int init_done = 0;
++
++/* The DL callbacks */
++
++
++#if defined(EFX_USE_FASTCALL)
++static enum efx_veto fastcall
++#else
++static enum efx_veto
++#endif
++bend_dl_tx_packet(struct efx_dl_device *efx_dl_dev,
++ struct sk_buff *skb)
++{
++ struct driverlink_port *port = efx_dl_dev->priv;
++
++ BUG_ON(port == NULL);
++
++ NETBACK_ACCEL_STATS_OP(global_stats.dl_tx_packets++);
++ if (skb->mac.raw != NULL)
++ netback_accel_tx_packet(skb, port->fwd_priv);
++ else {
++ DPRINTK("Ignoring packet with missing mac address\n");
++ NETBACK_ACCEL_STATS_OP(global_stats.dl_tx_bad_packets++);
++ }
++ return EFX_ALLOW_PACKET;
++}
++
++/* EFX_USE_FASTCALL */
++#if defined(EFX_USE_FASTCALL)
++static enum efx_veto fastcall
++#else
++static enum efx_veto
++#endif
++bend_dl_rx_packet(struct efx_dl_device *efx_dl_dev,
++ const char *pkt_buf, int pkt_len)
++{
++ struct driverlink_port *port = efx_dl_dev->priv;
++ struct netback_pkt_buf pkt;
++ struct ethhdr *eh;
++
++ BUG_ON(port == NULL);
++
++ pkt.mac.raw = (char *)pkt_buf;
++ pkt.nh.raw = (char *)pkt_buf + ETH_HLEN;
++ eh = (struct ethhdr *)pkt_buf;
++ pkt.protocol = eh->h_proto;
++
++ NETBACK_ACCEL_STATS_OP(global_stats.dl_rx_packets++);
++ netback_accel_rx_packet(&pkt, port->fwd_priv);
++ return EFX_ALLOW_PACKET;
++}
++
++
++/* Callbacks we'd like to get from the netdriver through driverlink */
++struct efx_dl_callbacks bend_dl_callbacks =
++ {
++ .tx_packet = bend_dl_tx_packet,
++ .rx_packet = bend_dl_rx_packet,
++ };
++
++
++static struct netback_accel_hooks accel_hooks = {
++ THIS_MODULE,
++ &netback_accel_probe,
++ &netback_accel_remove
++};
++
++
++/*
++ * Handy helper which given an efx_dl_device works out which
++ * efab_nic_t index into efrm_nic_table.nics[] it corresponds to
++ */
++static int efx_device_to_efab_nic_index(struct efx_dl_device *efx_dl_dev)
++{
++ int i;
++
++ for (i = 0; i < EFHW_MAX_NR_DEVS; i++) {
++ struct efhw_nic *nic = efrm_nic_table.nic[i];
++
++ /*
++ * It's possible for the nic structure to have not
++ * been initialised if the resource driver failed its
++ * driverlink probe
++ */
++ if (nic == NULL || nic->net_driver_dev == NULL)
++ continue;
++
++ /* Work out if these are talking about the same NIC */
++ if (nic->net_driver_dev->pci_dev == efx_dl_dev->pci_dev)
++ return i;
++ }
++
++ return -1;
++}
++
++
++/* Driver link probe - register our callbacks */
++static int bend_dl_probe(struct efx_dl_device *efx_dl_dev,
++ const struct net_device *net_dev,
++ const struct efx_dl_device_info *dev_info,
++ const char* silicon_rev)
++{
++ int rc;
++ enum net_accel_hw_type type;
++ struct driverlink_port *port;
++
++ DPRINTK("%s: %s\n", __FUNCTION__, silicon_rev);
++
++ if (strcmp(silicon_rev, "falcon/a1") == 0)
++ type = NET_ACCEL_MSG_HWTYPE_FALCON_A;
++ else if (strcmp(silicon_rev, "falcon/b0") == 0)
++ type = NET_ACCEL_MSG_HWTYPE_FALCON_B;
++ else {
++ EPRINTK("%s: unsupported silicon %s\n", __FUNCTION__,
++ silicon_rev);
++ rc = -EINVAL;
++ goto fail1;
++ }
++
++ port = kmalloc(sizeof(struct driverlink_port), GFP_KERNEL);
++ if (port == NULL) {
++ EPRINTK("%s: no memory for dl probe\n", __FUNCTION__);
++ rc = -ENOMEM;
++ goto fail1;
++ }
++
++ port->efx_dl_dev = efx_dl_dev;
++ efx_dl_dev->priv = port;
++
++ port->nic_index = efx_device_to_efab_nic_index(efx_dl_dev);
++ if (port->nic_index < 0) {
++ /*
++ * This can happen in theory if the resource driver
++ * failed to initialise properly
++ */
++ EPRINTK("%s: nic structure not found\n", __FUNCTION__);
++ rc = -EINVAL;
++ goto fail2;
++ }
++
++ port->fwd_priv = netback_accel_init_fwd_port();
++ if (port->fwd_priv == NULL) {
++ EPRINTK("%s: failed to set up forwarding for port\n",
++ __FUNCTION__);
++ rc = -ENOMEM;
++ goto fail2;
++ }
++
++ rc = efx_dl_register_callbacks(efx_dl_dev, &bend_dl_callbacks);
++ if (rc != 0) {
++ EPRINTK("%s: register_callbacks failed\n", __FUNCTION__);
++ goto fail3;
++ }
++
++ port->type = type;
++ port->net_dev = (struct net_device *)net_dev;
++
++ mutex_lock(&accel_mutex);
++ list_add(&port->link, &dl_ports);
++ mutex_unlock(&accel_mutex);
++
++ rc = netback_connect_accelerator(NETBACK_ACCEL_VERSION, 0,
++ port->net_dev->name, &accel_hooks);
++
++ if (rc < 0) {
++ EPRINTK("Xen netback accelerator version mismatch\n");
++ goto fail4;
++ } else if (rc > 0) {
++ /*
++ * In future may want to add backwards compatibility
++ * and accept certain subsets of previous versions
++ */
++ EPRINTK("Xen netback accelerator version mismatch\n");
++ goto fail4;
++ }
++
++ return 0;
++
++ fail4:
++ mutex_lock(&accel_mutex);
++ list_del(&port->link);
++ mutex_unlock(&accel_mutex);
++
++ efx_dl_unregister_callbacks(efx_dl_dev, &bend_dl_callbacks);
++ fail3:
++ netback_accel_shutdown_fwd_port(port->fwd_priv);
++ fail2:
++ efx_dl_dev->priv = NULL;
++ kfree(port);
++ fail1:
++ return rc;
++}
++
++
++static void bend_dl_remove(struct efx_dl_device *efx_dl_dev)
++{
++ struct driverlink_port *port;
++
++ DPRINTK("Unregistering driverlink callbacks.\n");
++
++ mutex_lock(&accel_mutex);
++
++ port = (struct driverlink_port *)efx_dl_dev->priv;
++
++ BUG_ON(list_empty(&dl_ports));
++ BUG_ON(port == NULL);
++ BUG_ON(port->efx_dl_dev != efx_dl_dev);
++
++ netback_disconnect_accelerator(0, port->net_dev->name);
++
++ list_del(&port->link);
++
++ mutex_unlock(&accel_mutex);
++
++ efx_dl_unregister_callbacks(efx_dl_dev, &bend_dl_callbacks);
++ netback_accel_shutdown_fwd_port(port->fwd_priv);
++
++ efx_dl_dev->priv = NULL;
++ kfree(port);
++
++ return;
++}
++
++
++static struct efx_dl_driver bend_dl_driver =
++ {
++ .name = "SFC Xen backend",
++ .probe = bend_dl_probe,
++ .remove = bend_dl_remove,
++ };
++
++
++int netback_accel_sf_init(void)
++{
++ int rc, nic_i;
++ struct efhw_nic *nic;
++
++ INIT_LIST_HEAD(&dl_ports);
++
++ rc = efx_dl_register_driver(&bend_dl_driver);
++ /* If we couldn't find the NET driver, give up */
++ if (rc == -ENOENT)
++ return rc;
++
++ if (rc == 0) {
++ EFRM_FOR_EACH_NIC(nic_i, nic)
++ falcon_nic_set_rx_usr_buf_size(nic,
++ SF_XEN_RX_USR_BUF_SIZE);
++ }
++
++ init_done = (rc == 0);
++ return rc;
++}
++
++
++void netback_accel_sf_shutdown(void)
++{
++ if (!init_done)
++ return;
++ DPRINTK("Unregistering driverlink driver\n");
++
++ /*
++ * This will trigger removal callbacks for all the devices, which
++ * will unregister their callbacks, disconnect from netfront, etc.
++ */
++ efx_dl_unregister_driver(&bend_dl_driver);
++}
++
++
++int netback_accel_sf_hwtype(struct netback_accel *bend)
++{
++ struct driverlink_port *port;
++
++ mutex_lock(&accel_mutex);
++
++ list_for_each_entry(port, &dl_ports, link) {
++ if (strcmp(bend->nicname, port->net_dev->name) == 0) {
++ bend->hw_type = port->type;
++ bend->accel_setup = netback_accel_setup_vnic_hw;
++ bend->accel_shutdown = netback_accel_shutdown_vnic_hw;
++ bend->fwd_priv = port->fwd_priv;
++ /* This is just needed to pass to efx_vi_alloc */
++ bend->nic_index = port->nic_index;
++ bend->net_dev = port->net_dev;
++ mutex_unlock(&accel_mutex);
++ return 0;
++ }
++ }
++
++ mutex_unlock(&accel_mutex);
++
++ EPRINTK("Failed to identify backend device '%s' with a NIC\n",
++ bend->nicname);
++
++ return -ENOENT;
++}
++
++
++/****************************************************************************
++ * Resource management code
++ ***************************************************************************/
++
++static int alloc_page_state(struct netback_accel *bend, int max_pages)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv;
++
++ if (max_pages < 0 || max_pages > bend->quotas.max_buf_pages) {
++ EPRINTK("%s: invalid max_pages: %d\n", __FUNCTION__, max_pages);
++ return -EINVAL;
++ }
++
++ accel_hw_priv = kzalloc(sizeof(struct falcon_bend_accel_priv),
++ GFP_KERNEL);
++ if (accel_hw_priv == NULL) {
++ EPRINTK("%s: no memory for accel_hw_priv\n", __FUNCTION__);
++ return -ENOMEM;
++ }
++
++ accel_hw_priv->dma_maps = kzalloc
++ (sizeof(struct efx_vi_dma_map_state **) *
++ (max_pages / NET_ACCEL_MSG_MAX_PAGE_REQ), GFP_KERNEL);
++ if (accel_hw_priv->dma_maps == NULL) {
++ EPRINTK("%s: no memory for dma_maps\n", __FUNCTION__);
++ kfree(accel_hw_priv);
++ return -ENOMEM;
++ }
++
++ bend->buffer_maps = kzalloc(sizeof(struct vm_struct *) * max_pages,
++ GFP_KERNEL);
++ if (bend->buffer_maps == NULL) {
++ EPRINTK("%s: no memory for buffer_maps\n", __FUNCTION__);
++ kfree(accel_hw_priv->dma_maps);
++ kfree(accel_hw_priv);
++ return -ENOMEM;
++ }
++
++ bend->buffer_addrs = kzalloc(sizeof(u64) * max_pages, GFP_KERNEL);
++ if (bend->buffer_addrs == NULL) {
++ kfree(bend->buffer_maps);
++ kfree(accel_hw_priv->dma_maps);
++ kfree(accel_hw_priv);
++ return -ENOMEM;
++ }
++
++ bend->accel_hw_priv = accel_hw_priv;
++
++ return 0;
++}
++
++
++static int free_page_state(struct netback_accel *bend)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv;
++
++ DPRINTK("%s: %p\n", __FUNCTION__, bend);
++
++ accel_hw_priv = bend->accel_hw_priv;
++
++ if (accel_hw_priv) {
++ kfree(accel_hw_priv->dma_maps);
++ kfree(bend->buffer_maps);
++ kfree(bend->buffer_addrs);
++ kfree(accel_hw_priv);
++ bend->accel_hw_priv = NULL;
++ bend->max_pages = 0;
++ }
++
++ return 0;
++}
++
++
++/* The timeout event callback for the event q */
++static void bend_evq_timeout(void *context, int is_timeout)
++{
++ struct netback_accel *bend = (struct netback_accel *)context;
++ if (is_timeout) {
++ /* Pass event to vnic front end driver */
++ VPRINTK("timeout event to %d\n", bend->net_channel);
++ NETBACK_ACCEL_STATS_OP(bend->stats.evq_timeouts++);
++ notify_remote_via_irq(bend->net_channel_irq);
++ } else {
++ /* It's a wakeup event, used by Falcon */
++ VPRINTK("wakeup to %d\n", bend->net_channel);
++ NETBACK_ACCEL_STATS_OP(bend->stats.evq_wakeups++);
++ notify_remote_via_irq(bend->net_channel_irq);
++ }
++}
++
++
++/*
++ * Create the eventq and associated gubbins for communication with the
++ * front end vnic driver
++ */
++static int ef_get_vnic(struct netback_accel *bend)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv;
++ int rc = 0;
++
++ BUG_ON(bend->hw_state != NETBACK_ACCEL_RES_NONE);
++
++ /* Allocate page related state and accel_hw_priv */
++ rc = alloc_page_state(bend, bend->max_pages);
++ if (rc != 0) {
++ EPRINTK("Failed to allocate page state: %d\n", rc);
++ return rc;
++ }
++
++ accel_hw_priv = bend->accel_hw_priv;
++
++ rc = efx_vi_alloc(&accel_hw_priv->efx_vih, bend->nic_index);
++ if (rc != 0) {
++ EPRINTK("%s: efx_vi_alloc failed %d\n", __FUNCTION__, rc);
++ free_page_state(bend);
++ return rc;
++ }
++
++ rc = efx_vi_eventq_register_callback(accel_hw_priv->efx_vih,
++ bend_evq_timeout,
++ bend);
++ if (rc != 0) {
++ EPRINTK("%s: register_callback failed %d\n", __FUNCTION__, rc);
++ efx_vi_free(accel_hw_priv->efx_vih);
++ free_page_state(bend);
++ return rc;
++ }
++
++ bend->hw_state = NETBACK_ACCEL_RES_ALLOC;
++
++ return 0;
++}
++
++
++static void ef_free_vnic(struct netback_accel *bend)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++
++ BUG_ON(bend->hw_state != NETBACK_ACCEL_RES_ALLOC);
++
++ efx_vi_eventq_kill_callback(accel_hw_priv->efx_vih);
++
++ DPRINTK("Hardware is freeable. Will proceed.\n");
++
++ efx_vi_free(accel_hw_priv->efx_vih);
++ accel_hw_priv->efx_vih = NULL;
++
++ VPRINTK("Free page state...\n");
++ free_page_state(bend);
++
++ bend->hw_state = NETBACK_ACCEL_RES_NONE;
++}
++
++
++static inline void ungrant_or_crash(grant_ref_t gntref, int domain) {
++ if (net_accel_ungrant_page(gntref) == -EBUSY)
++ net_accel_shutdown_remote(domain);
++}
++
++
++static void netback_accel_release_hwinfo(struct netback_accel *bend)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++ int i;
++
++ DPRINTK("Remove dma q grants %d %d\n", accel_hw_priv->txdmaq_gnt,
++ accel_hw_priv->rxdmaq_gnt);
++ ungrant_or_crash(accel_hw_priv->txdmaq_gnt, bend->far_end);
++ ungrant_or_crash(accel_hw_priv->rxdmaq_gnt, bend->far_end);
++
++ DPRINTK("Remove doorbell grant %d\n", accel_hw_priv->doorbell_gnt);
++ ungrant_or_crash(accel_hw_priv->doorbell_gnt, bend->far_end);
++
++ if (bend->hw_type == NET_ACCEL_MSG_HWTYPE_FALCON_A) {
++ DPRINTK("Remove rptr grant %d\n", accel_hw_priv->evq_rptr_gnt);
++ ungrant_or_crash(accel_hw_priv->evq_rptr_gnt, bend->far_end);
++ }
++
++ for (i = 0; i < accel_hw_priv->evq_npages; i++) {
++ DPRINTK("Remove evq grant %d\n", accel_hw_priv->evq_mem_gnts[i]);
++ ungrant_or_crash(accel_hw_priv->evq_mem_gnts[i], bend->far_end);
++ }
++
++ bend->hw_state = NETBACK_ACCEL_RES_FILTER;
++
++ return;
++}
++
++
++static int ef_bend_hwinfo_falcon_common(struct netback_accel *bend,
++ struct net_accel_hw_falcon_b *hwinfo)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++ struct efx_vi_hw_resource_metadata res_mdata;
++ struct efx_vi_hw_resource res_array[EFX_VI_HW_RESOURCE_MAXSIZE];
++ int rc, len = EFX_VI_HW_RESOURCE_MAXSIZE, i, pfn = 0;
++ unsigned long txdmaq_pfn = 0, rxdmaq_pfn = 0;
++
++ rc = efx_vi_hw_resource_get_phys(accel_hw_priv->efx_vih, &res_mdata,
++ res_array, &len);
++ if (rc != 0) {
++ DPRINTK("%s: resource_get_phys returned %d\n",
++ __FUNCTION__, rc);
++ return rc;
++ }
++
++ if (res_mdata.version != 0)
++ return -EPROTO;
++
++ hwinfo->nic_arch = res_mdata.nic_arch;
++ hwinfo->nic_variant = res_mdata.nic_variant;
++ hwinfo->nic_revision = res_mdata.nic_revision;
++
++ hwinfo->evq_order = res_mdata.evq_order;
++ hwinfo->evq_offs = res_mdata.evq_offs;
++ hwinfo->evq_capacity = res_mdata.evq_capacity;
++ hwinfo->instance = res_mdata.instance;
++ hwinfo->rx_capacity = res_mdata.rx_capacity;
++ hwinfo->tx_capacity = res_mdata.tx_capacity;
++
++ VPRINTK("evq_order %d evq_offs %d evq_cap %d inst %d rx_cap %d tx_cap %d\n",
++ hwinfo->evq_order, hwinfo->evq_offs, hwinfo->evq_capacity,
++ hwinfo->instance, hwinfo->rx_capacity, hwinfo->tx_capacity);
++
++ for (i = 0; i < len; i++) {
++ struct efx_vi_hw_resource *res = &(res_array[i]);
++ switch (res->type) {
++ case EFX_VI_HW_RESOURCE_TXDMAQ:
++ txdmaq_pfn = page_to_pfn(virt_to_page(res->address));
++ break;
++ case EFX_VI_HW_RESOURCE_RXDMAQ:
++ rxdmaq_pfn = page_to_pfn(virt_to_page(res->address));
++ break;
++ case EFX_VI_HW_RESOURCE_EVQTIMER:
++ break;
++ case EFX_VI_HW_RESOURCE_EVQRPTR:
++ case EFX_VI_HW_RESOURCE_EVQRPTR_OFFSET:
++ hwinfo->evq_rptr = res->address;
++ break;
++ case EFX_VI_HW_RESOURCE_EVQMEMKVA:
++ accel_hw_priv->evq_npages = 1 << res_mdata.evq_order;
++ pfn = page_to_pfn(virt_to_page(res->address));
++ break;
++ case EFX_VI_HW_RESOURCE_BELLPAGE:
++ hwinfo->doorbell_mfn = res->address;
++ break;
++ default:
++ EPRINTK("%s: Unknown hardware resource type %d\n",
++ __FUNCTION__, res->type);
++ break;
++ }
++ }
++
++ VPRINTK("Passing txdmaq page pfn %lx\n", txdmaq_pfn);
++ accel_hw_priv->txdmaq_gnt = hwinfo->txdmaq_gnt =
++ net_accel_grant_page(bend->hdev_data, pfn_to_mfn(txdmaq_pfn),
++ 0);
++
++ VPRINTK("Passing rxdmaq page pfn %lx\n", rxdmaq_pfn);
++ accel_hw_priv->rxdmaq_gnt = hwinfo->rxdmaq_gnt =
++ net_accel_grant_page(bend->hdev_data, pfn_to_mfn(rxdmaq_pfn),
++ 0);
++
++ VPRINTK("Passing doorbell page mfn %x\n", hwinfo->doorbell_mfn);
++ /* Make the relevant H/W pages mappable by the far end */
++ accel_hw_priv->doorbell_gnt = hwinfo->doorbell_gnt =
++ net_accel_grant_page(bend->hdev_data, hwinfo->doorbell_mfn, 1);
++
++ /* Now do the same for the memory pages */
++ /* Convert the page + length we got back for the evq to grants. */
++ for (i = 0; i < accel_hw_priv->evq_npages; i++) {
++ accel_hw_priv->evq_mem_gnts[i] = hwinfo->evq_mem_gnts[i] =
++ net_accel_grant_page(bend->hdev_data, pfn_to_mfn(pfn), 0);
++ VPRINTK("Got grant %u for evq pfn %x\n", hwinfo->evq_mem_gnts[i],
++ pfn);
++ pfn++;
++ }
++
++ return 0;
++}
++
++
++static int ef_bend_hwinfo_falcon_a(struct netback_accel *bend,
++ struct net_accel_hw_falcon_a *hwinfo)
++{
++ int rc;
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++
++ if ((rc = ef_bend_hwinfo_falcon_common(bend, &hwinfo->common)) != 0)
++ return rc;
++
++ /*
++ * Note that unlike the above, where the message field is the
++ * page number, here evq_rptr is the entire address because
++ * it is currently a pointer into the densely mapped timer page.
++ */
++ VPRINTK("Passing evq_rptr pfn %x for rptr %x\n",
++ hwinfo->common.evq_rptr >> PAGE_SHIFT,
++ hwinfo->common.evq_rptr);
++ rc = net_accel_grant_page(bend->hdev_data,
++ hwinfo->common.evq_rptr >> PAGE_SHIFT, 0);
++ if (rc < 0)
++ return rc;
++
++ accel_hw_priv->evq_rptr_gnt = hwinfo->evq_rptr_gnt = rc;
++ VPRINTK("evq_rptr_gnt got %d\n", hwinfo->evq_rptr_gnt);
++
++ return 0;
++}
++
++
++static int ef_bend_hwinfo_falcon_b(struct netback_accel *bend,
++ struct net_accel_hw_falcon_b *hwinfo)
++{
++ return ef_bend_hwinfo_falcon_common(bend, hwinfo);
++}
++
++
++/*
++ * Fill in the message with a description of the hardware resources, based on
++ * the H/W type
++ */
++static int netback_accel_hwinfo(struct netback_accel *bend,
++ struct net_accel_msg_hw *msgvi)
++{
++ int rc = 0;
++
++ BUG_ON(bend->hw_state != NETBACK_ACCEL_RES_FILTER);
++
++ msgvi->type = bend->hw_type;
++ switch (bend->hw_type) {
++ case NET_ACCEL_MSG_HWTYPE_FALCON_A:
++ rc = ef_bend_hwinfo_falcon_a(bend, &msgvi->resources.falcon_a);
++ break;
++ case NET_ACCEL_MSG_HWTYPE_FALCON_B:
++ rc = ef_bend_hwinfo_falcon_b(bend, &msgvi->resources.falcon_b);
++ break;
++ case NET_ACCEL_MSG_HWTYPE_NONE:
++ /* Nothing to do. The slow path should just work. */
++ break;
++ }
++
++ if (rc == 0)
++ bend->hw_state = NETBACK_ACCEL_RES_HWINFO;
++
++ return rc;
++}
++
++
++/* Allocate hardware resources and make them available to the client domain */
++int netback_accel_setup_vnic_hw(struct netback_accel *bend)
++{
++ struct net_accel_msg msg;
++ int err;
++
++ /* Allocate the event queue, VI and so on. */
++ err = ef_get_vnic(bend);
++ if (err) {
++ EPRINTK("Failed to allocate hardware resource for bend:"
++ "error %d\n", err);
++ return err;
++ }
++
++ /* Set up the filter management */
++ err = netback_accel_filter_init(bend);
++ if (err) {
++ EPRINTK("Filter setup failed, error %d", err);
++ ef_free_vnic(bend);
++ return err;
++ }
++
++ net_accel_msg_init(&msg, NET_ACCEL_MSG_SETHW);
++
++ /*
++ * Extract the low-level hardware info we will actually pass to the
++ * other end, and set up the grants/ioremap permissions needed
++ */
++ err = netback_accel_hwinfo(bend, &msg.u.hw);
++
++ if (err != 0) {
++ netback_accel_filter_shutdown(bend);
++ ef_free_vnic(bend);
++ return err;
++ }
++
++ /* Send the message, this is a reply to a hello-reply */
++ err = net_accel_msg_reply_notify(bend->shared_page,
++ bend->msg_channel_irq,
++ &bend->to_domU, &msg);
++
++ /*
++ * The message should succeed as it's logically a reply and we
++ * guarantee space for replies, but a misbehaving frontend
++ * could result in that behaviour, so be tolerant
++ */
++ if (err != 0) {
++ netback_accel_release_hwinfo(bend);
++ netback_accel_filter_shutdown(bend);
++ ef_free_vnic(bend);
++ }
++
++ return err;
++}
++
++
++/* Free hardware resources */
++void netback_accel_shutdown_vnic_hw(struct netback_accel *bend)
++{
++ /*
++ * Only try and release resources if accel_hw_priv was setup,
++ * otherwise there is nothing to do as we're on "null-op"
++ * acceleration
++ */
++ switch (bend->hw_state) {
++ case NETBACK_ACCEL_RES_HWINFO:
++ VPRINTK("Release hardware resources\n");
++ netback_accel_release_hwinfo(bend);
++ /* deliberate drop through */
++ case NETBACK_ACCEL_RES_FILTER:
++ VPRINTK("Free filters...\n");
++ netback_accel_filter_shutdown(bend);
++ /* deliberate drop through */
++ case NETBACK_ACCEL_RES_ALLOC:
++ VPRINTK("Free vnic...\n");
++ ef_free_vnic(bend);
++ /* deliberate drop through */
++ case NETBACK_ACCEL_RES_NONE:
++ break;
++ default:
++ BUG();
++ }
++}
++
++/**************************************************************************
++ *
++ * Buffer table stuff
++ *
++ **************************************************************************/
++
++/*
++ * Undo any allocation that netback_accel_msg_rx_buffer_map() has made
++ * if it fails half way through
++ */
++static inline void buffer_map_cleanup(struct netback_accel *bend, int i)
++{
++ while (i > 0) {
++ i--;
++ bend->buffer_maps_index--;
++ net_accel_unmap_device_page(bend->hdev_data,
++ bend->buffer_maps[bend->buffer_maps_index],
++ bend->buffer_addrs[bend->buffer_maps_index]);
++ }
++}
++
++
++int netback_accel_add_buffers(struct netback_accel *bend, int pages, int log2_pages,
++ u32 *grants, u32 *buf_addr_out)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++ unsigned long long addr_array[NET_ACCEL_MSG_MAX_PAGE_REQ];
++ int rc, i, index;
++ u64 dev_bus_addr;
++
++ /* Make sure we can't overflow the dma_maps array */
++ if (accel_hw_priv->dma_maps_index >=
++ bend->max_pages / NET_ACCEL_MSG_MAX_PAGE_REQ) {
++ EPRINTK("%s: too many buffer table allocations: %d %d\n",
++ __FUNCTION__, accel_hw_priv->dma_maps_index,
++ bend->max_pages / NET_ACCEL_MSG_MAX_PAGE_REQ);
++ return -EINVAL;
++ }
++
++ /* Make sure we can't overflow the buffer_maps array */
++ if (bend->buffer_maps_index + pages > bend->max_pages) {
++ EPRINTK("%s: too many pages mapped: %d + %d > %d\n",
++ __FUNCTION__, bend->buffer_maps_index,
++ pages, bend->max_pages);
++ return -EINVAL;
++ }
++
++ for (i = 0; i < pages; i++) {
++ VPRINTK("%s: mapping page %d\n", __FUNCTION__, i);
++ rc = net_accel_map_device_page
++ (bend->hdev_data, grants[i],
++ &bend->buffer_maps[bend->buffer_maps_index],
++ &dev_bus_addr);
++
++ if (rc != 0) {
++ EPRINTK("error in net_accel_map_device_page\n");
++ buffer_map_cleanup(bend, i);
++ return rc;
++ }
++
++ bend->buffer_addrs[bend->buffer_maps_index] = dev_bus_addr;
++
++ bend->buffer_maps_index++;
++
++ addr_array[i] = dev_bus_addr;
++ }
++
++ VPRINTK("%s: mapping dma addresses to vih %p\n", __FUNCTION__,
++ accel_hw_priv->efx_vih);
++
++ index = accel_hw_priv->dma_maps_index;
++ if ((rc = efx_vi_dma_map_addrs(accel_hw_priv->efx_vih, addr_array, pages,
++ &(accel_hw_priv->dma_maps[index]))) < 0) {
++ EPRINTK("error in dma_map_pages\n");
++ buffer_map_cleanup(bend, i);
++ return rc;
++ }
++
++ accel_hw_priv->dma_maps_index++;
++ NETBACK_ACCEL_STATS_OP(bend->stats.num_buffer_pages += pages);
++
++ //DPRINTK("%s: getting map address\n", __FUNCTION__);
++
++ *buf_addr_out = efx_vi_dma_get_map_addr(accel_hw_priv->efx_vih,
++ accel_hw_priv->dma_maps[index]);
++
++ //DPRINTK("%s: done\n", __FUNCTION__);
++
++ return 0;
++}
++
++
++int netback_accel_remove_buffers(struct netback_accel *bend)
++{
++ /* Only try to free buffers if accel_hw_priv was setup */
++ if (bend->hw_state != NETBACK_ACCEL_RES_NONE) {
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++ int i;
++
++ efx_vi_reset(accel_hw_priv->efx_vih);
++
++ while (accel_hw_priv->dma_maps_index > 0) {
++ accel_hw_priv->dma_maps_index--;
++ i = accel_hw_priv->dma_maps_index;
++ efx_vi_dma_unmap_addrs(accel_hw_priv->efx_vih,
++ accel_hw_priv->dma_maps[i]);
++ }
++
++ while (bend->buffer_maps_index > 0) {
++ VPRINTK("Unmapping granted buffer %d\n",
++ bend->buffer_maps_index);
++ bend->buffer_maps_index--;
++ i = bend->buffer_maps_index;
++ net_accel_unmap_device_page(bend->hdev_data,
++ bend->buffer_maps[i],
++ bend->buffer_addrs[i]);
++ }
++
++ NETBACK_ACCEL_STATS_OP(bend->stats.num_buffer_pages = 0);
++ }
++
++ return 0;
++}
++
++/**************************************************************************
++ *
++ * Filter stuff
++ *
++ **************************************************************************/
++
++static int netback_accel_filter_init(struct netback_accel *bend)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++ int i, rc;
++
++ BUG_ON(bend->hw_state != NETBACK_ACCEL_RES_ALLOC);
++
++ spin_lock_init(&accel_hw_priv->filter_lock);
++
++ if ((rc = cuckoo_hash_init(&accel_hw_priv->filter_hash_table,
++ 5 /* space for 32 filters */, 8)) != 0) {
++ EPRINTK("Failed to initialise filter hash table\n");
++ return rc;
++ }
++
++ accel_hw_priv->fspecs = kzalloc(sizeof(struct netback_accel_filter_spec) *
++ bend->quotas.max_filters,
++ GFP_KERNEL);
++
++ if (accel_hw_priv->fspecs == NULL) {
++ EPRINTK("No memory for filter specs.\n");
++ cuckoo_hash_destroy(&accel_hw_priv->filter_hash_table);
++ return -ENOMEM;
++ }
++
++ for (i = 0; i < bend->quotas.max_filters; i++) {
++ accel_hw_priv->free_filters |= (1 << i);
++ }
++
++ /* Base mask on highest set bit in max_filters */
++ accel_hw_priv->filter_idx_mask = (1 << fls(bend->quotas.max_filters)) - 1;
++ VPRINTK("filter setup: max is %x mask is %x\n",
++ bend->quotas.max_filters, accel_hw_priv->filter_idx_mask);
++
++ bend->hw_state = NETBACK_ACCEL_RES_FILTER;
++
++ return 0;
++}
++
++
++static inline void make_filter_key(cuckoo_hash_ip_key *key,
++ struct netback_accel_filter_spec *filt)
++
++{
++ key->local_ip = filt->destip_be;
++ key->local_port = filt->destport_be;
++ key->proto = filt->proto;
++}
++
++
++static inline
++void netback_accel_free_filter(struct falcon_bend_accel_priv *accel_hw_priv,
++ int filter)
++{
++ cuckoo_hash_ip_key filter_key;
++
++ if (!(accel_hw_priv->free_filters & (1 << filter))) {
++ efx_vi_filter_stop(accel_hw_priv->efx_vih,
++ accel_hw_priv->fspecs[filter].filter_handle);
++ make_filter_key(&filter_key, &(accel_hw_priv->fspecs[filter]));
++ if (cuckoo_hash_remove(&accel_hw_priv->filter_hash_table,
++ (cuckoo_hash_key *)&filter_key)) {
++ EPRINTK("%s: Couldn't find filter to remove from table\n",
++ __FUNCTION__);
++ BUG();
++ }
++ }
++}
++
++
++static void netback_accel_filter_shutdown(struct netback_accel *bend)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++ int i;
++ unsigned long flags;
++
++ BUG_ON(bend->hw_state != NETBACK_ACCEL_RES_FILTER);
++
++ spin_lock_irqsave(&accel_hw_priv->filter_lock, flags);
++
++ BUG_ON(accel_hw_priv->fspecs == NULL);
++
++ for (i = 0; i < bend->quotas.max_filters; i++) {
++ netback_accel_free_filter(accel_hw_priv, i);
++ }
++
++ kfree(accel_hw_priv->fspecs);
++ accel_hw_priv->fspecs = NULL;
++ accel_hw_priv->free_filters = 0;
++
++ cuckoo_hash_destroy(&accel_hw_priv->filter_hash_table);
++
++ spin_unlock_irqrestore(&accel_hw_priv->filter_lock, flags);
++
++ bend->hw_state = NETBACK_ACCEL_RES_ALLOC;
++}
++
++
++/*! Suggest a filter to replace when we want to insert a new one and have
++ * none free.
++ */
++static unsigned get_victim_filter(struct netback_accel *bend)
++{
++ /*
++ * We could attempt to get really clever, and may do at some
++ * point, but random replacement is v. cheap and low on
++ * pathological worst cases.
++ */
++ unsigned index, cycles;
++
++ rdtscl(cycles);
++
++ /*
++ * Some doubt about the quality of the bottom few bits, so
++ * throw 'em * away
++ */
++ index = (cycles >> 4) & ((struct falcon_bend_accel_priv *)
++ bend->accel_hw_priv)->filter_idx_mask;
++ /*
++ * We don't enforce that the number of filters is a power of
++ * two, but the masking gets us to within one subtraction of a
++ * valid index
++ */
++ if (index >= bend->quotas.max_filters)
++ index -= bend->quotas.max_filters;
++ DPRINTK("backend %s->%d has no free filters. Filter %d will be evicted\n",
++ bend->nicname, bend->far_end, index);
++ return index;
++}
++
++
++/* Add a filter for the specified IP/port to the backend */
++int
++netback_accel_filter_check_add(struct netback_accel *bend,
++ struct netback_accel_filter_spec *filt)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++ struct netback_accel_filter_spec *fs;
++ unsigned filter_index;
++ unsigned long flags;
++ int rc, recycling = 0;
++ cuckoo_hash_ip_key filter_key, evict_key;
++
++ BUG_ON(filt->proto != IPPROTO_TCP && filt->proto != IPPROTO_UDP);
++
++ DPRINTK("Will add %s filter for dst ip %08x and dst port %d\n",
++ (filt->proto == IPPROTO_TCP) ? "TCP" : "UDP",
++ be32_to_cpu(filt->destip_be), be16_to_cpu(filt->destport_be));
++
++ spin_lock_irqsave(&accel_hw_priv->filter_lock, flags);
++ /*
++ * Check to see if we're already filtering this IP address and
++ * port. Happens if you insert a filter mid-stream as there
++ * are many packets backed up to be delivered to dom0 already
++ */
++ make_filter_key(&filter_key, filt);
++ if (cuckoo_hash_lookup(&accel_hw_priv->filter_hash_table,
++ (cuckoo_hash_key *)(&filter_key),
++ &filter_index)) {
++ DPRINTK("Found matching filter %d already in table\n",
++ filter_index);
++ rc = -1;
++ goto out;
++ }
++
++ if (accel_hw_priv->free_filters == 0) {
++ filter_index = get_victim_filter(bend);
++ recycling = 1;
++ } else {
++ filter_index = __ffs(accel_hw_priv->free_filters);
++ clear_bit(filter_index, &accel_hw_priv->free_filters);
++ }
++
++ fs = &accel_hw_priv->fspecs[filter_index];
++
++ if (recycling) {
++ DPRINTK("Removing filter index %d handle %p\n", filter_index,
++ fs->filter_handle);
++
++ if ((rc = efx_vi_filter_stop(accel_hw_priv->efx_vih,
++ fs->filter_handle)) != 0) {
++ EPRINTK("Couldn't clear NIC filter table entry %d\n", rc);
++ }
++
++ make_filter_key(&evict_key, fs);
++ if (cuckoo_hash_remove(&accel_hw_priv->filter_hash_table,
++ (cuckoo_hash_key *)&evict_key)) {
++ EPRINTK("Couldn't find filter to remove from table\n");
++ BUG();
++ }
++ NETBACK_ACCEL_STATS_OP(bend->stats.num_filters--);
++ }
++
++ /* Update the filter spec with new details */
++ *fs = *filt;
++
++ if ((rc = cuckoo_hash_add(&accel_hw_priv->filter_hash_table,
++ (cuckoo_hash_key *)&filter_key, filter_index,
++ 1)) != 0) {
++ EPRINTK("Error (%d) adding filter to table\n", rc);
++ accel_hw_priv->free_filters |= (1 << filter_index);
++ goto out;
++ }
++
++ rc = efx_vi_filter(accel_hw_priv->efx_vih, filt->proto, filt->destip_be,
++ filt->destport_be,
++ (struct filter_resource_t **)&fs->filter_handle);
++
++ if (rc != 0) {
++ EPRINTK("Hardware filter insertion failed. Error %d\n", rc);
++ accel_hw_priv->free_filters |= (1 << filter_index);
++ cuckoo_hash_remove(&accel_hw_priv->filter_hash_table,
++ (cuckoo_hash_key *)&filter_key);
++ rc = -1;
++ goto out;
++ }
++
++ NETBACK_ACCEL_STATS_OP(bend->stats.num_filters++);
++
++ VPRINTK("%s: success index %d handle %p\n", __FUNCTION__, filter_index,
++ fs->filter_handle);
++
++ rc = filter_index;
++ out:
++ spin_unlock_irqrestore(&accel_hw_priv->filter_lock, flags);
++ return rc;
++}
++
++
++/* Remove a filter entry for the specific device and IP/port */
++static void netback_accel_filter_remove(struct netback_accel *bend,
++ int filter_index)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++
++ BUG_ON(accel_hw_priv->free_filters & (1 << filter_index));
++ netback_accel_free_filter(accel_hw_priv, filter_index);
++ accel_hw_priv->free_filters |= (1 << filter_index);
++}
++
++
++/* Remove a filter entry for the specific device and IP/port */
++void netback_accel_filter_remove_spec(struct netback_accel *bend,
++ struct netback_accel_filter_spec *filt)
++{
++ struct falcon_bend_accel_priv *accel_hw_priv = bend->accel_hw_priv;
++ unsigned filter_found;
++ unsigned long flags;
++ cuckoo_hash_ip_key filter_key;
++ struct netback_accel_filter_spec *fs;
++
++ if (filt->proto == IPPROTO_TCP) {
++ DPRINTK("Remove TCP filter for dst ip %08x and dst port %d\n",
++ be32_to_cpu(filt->destip_be),
++ be16_to_cpu(filt->destport_be));
++ } else if (filt->proto == IPPROTO_UDP) {
++ DPRINTK("Remove UDP filter for dst ip %08x and dst port %d\n",
++ be32_to_cpu(filt->destip_be),
++ be16_to_cpu(filt->destport_be));
++ } else {
++ /*
++ * This could be provoked by an evil frontend, so can't
++ * BUG(), but harmless as it should fail tests below
++ */
++ DPRINTK("Non-TCP/UDP filter dst ip %08x and dst port %d\n",
++ be32_to_cpu(filt->destip_be),
++ be16_to_cpu(filt->destport_be));
++ }
++
++ spin_lock_irqsave(&accel_hw_priv->filter_lock, flags);
++
++ make_filter_key(&filter_key, filt);
++ if (!cuckoo_hash_lookup(&accel_hw_priv->filter_hash_table,
++ (cuckoo_hash_key *)(&filter_key),
++ &filter_found)) {
++ EPRINTK("Couldn't find matching filter already in table\n");
++ goto out;
++ }
++
++ /* Do a full check to make sure we've not had a hash collision */
++ fs = &accel_hw_priv->fspecs[filter_found];
++ if (fs->destip_be == filt->destip_be &&
++ fs->destport_be == filt->destport_be &&
++ fs->proto == filt->proto &&
++ !memcmp(fs->mac, filt->mac, ETH_ALEN)) {
++ netback_accel_filter_remove(bend, filter_found);
++ } else {
++ EPRINTK("Entry in hash table does not match filter spec\n");
++ goto out;
++ }
++
++ out:
++ spin_unlock_irqrestore(&accel_hw_priv->filter_lock, flags);
++}
+Index: head-2008-11-25/drivers/xen/sfc_netback/accel_solarflare.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/accel_solarflare.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,88 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NETBACK_ACCEL_SOLARFLARE_H
++#define NETBACK_ACCEL_SOLARFLARE_H
++
++#include "accel.h"
++#include "accel_msg_iface.h"
++
++#include "driverlink_api.h"
++
++#define MAX_NICS 5
++#define MAX_PORTS 2
++
++
++extern int netback_accel_sf_init(void);
++extern void netback_accel_sf_shutdown(void);
++extern int netback_accel_sf_hwtype(struct netback_accel *bend);
++
++extern int netback_accel_sf_char_init(void);
++extern void netback_accel_sf_char_shutdown(void);
++
++extern int netback_accel_setup_vnic_hw(struct netback_accel *bend);
++extern void netback_accel_shutdown_vnic_hw(struct netback_accel *bend);
++
++extern int netback_accel_add_buffers(struct netback_accel *bend, int pages,
++ int log2_pages, u32 *grants,
++ u32 *buf_addr_out);
++extern int netback_accel_remove_buffers(struct netback_accel *bend);
++
++
++/* Add a filter for the specified IP/port to the backend */
++extern int
++netback_accel_filter_check_add(struct netback_accel *bend,
++ struct netback_accel_filter_spec *filt);
++/* Remove a filter entry for the specific device and IP/port */
++extern
++void netback_accel_filter_remove_index(struct netback_accel *bend,
++ int filter_index);
++extern
++void netback_accel_filter_remove_spec(struct netback_accel *bend,
++ struct netback_accel_filter_spec *filt);
++
++/* This is designed to look a bit like a skb */
++struct netback_pkt_buf {
++ union {
++ unsigned char *raw;
++ } mac;
++ union {
++ struct iphdr *iph;
++ struct arphdr *arph;
++ unsigned char *raw;
++ } nh;
++ int protocol;
++};
++
++/*! \brief Handle a received packet: insert fast path filters as necessary
++ * \param skb The packet buffer
++ */
++extern void netback_accel_rx_packet(struct netback_pkt_buf *skb, void *fwd_priv);
++
++/*! \brief Handle a transmitted packet: update fast path filters as necessary
++ * \param skb The packet buffer
++ */
++extern void netback_accel_tx_packet(struct sk_buff *skb, void *fwd_priv);
++
++#endif /* NETBACK_ACCEL_SOLARFLARE_H */
+Index: head-2008-11-25/drivers/xen/sfc_netback/accel_xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/accel_xenbus.c 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,831 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <xen/evtchn.h>
++#include <linux/mutex.h>
++
++/* drivers/xen/netback/common.h */
++#include "common.h"
++
++#include "accel.h"
++#include "accel_solarflare.h"
++#include "accel_util.h"
++
++#define NODENAME_PATH_FMT "backend/vif/%d/%d"
++
++#define NETBACK_ACCEL_FROM_XENBUS_DEVICE(_dev) (struct netback_accel *) \
++ ((struct backend_info *)(_dev)->dev.driver_data)->netback_accel_priv
++
++/* List of all the bends currently in existence. */
++struct netback_accel *bend_list = NULL;
++DEFINE_MUTEX(bend_list_mutex);
++
++/* Put in bend_list. Must hold bend_list_mutex */
++static void link_bend(struct netback_accel *bend)
++{
++ bend->next_bend = bend_list;
++ bend_list = bend;
++}
++
++/* Remove from bend_list, Must hold bend_list_mutex */
++static void unlink_bend(struct netback_accel *bend)
++{
++ struct netback_accel *tmp = bend_list;
++ struct netback_accel *prev = NULL;
++ while (tmp != NULL) {
++ if (tmp == bend) {
++ if (prev != NULL)
++ prev->next_bend = bend->next_bend;
++ else
++ bend_list = bend->next_bend;
++ return;
++ }
++ prev = tmp;
++ tmp = tmp->next_bend;
++ }
++}
++
++
++/* Demultiplex a message IRQ from the frontend driver. */
++static irqreturn_t msgirq_from_frontend(int irq, void *context,
++ struct pt_regs *unused)
++{
++ struct xenbus_device *dev = context;
++ struct netback_accel *bend = NETBACK_ACCEL_FROM_XENBUS_DEVICE(dev);
++ VPRINTK("irq %d from device %s\n", irq, dev->nodename);
++ schedule_work(&bend->handle_msg);
++ return IRQ_HANDLED;
++}
++
++
++/*
++ * Demultiplex an IRQ from the frontend driver. This is never used
++ * functionally, but we need it to pass to the bind function, and may
++ * get called spuriously
++ */
++static irqreturn_t netirq_from_frontend(int irq, void *context,
++ struct pt_regs *unused)
++{
++ VPRINTK("netirq %d from device %s\n", irq,
++ ((struct xenbus_device *)context)->nodename);
++
++ return IRQ_HANDLED;
++}
++
++
++/* Read the limits values of the xenbus structure. */
++static
++void cfg_hw_quotas(struct xenbus_device *dev, struct netback_accel *bend)
++{
++ int err = xenbus_gather
++ (XBT_NIL, dev->nodename,
++ "limits/max-filters", "%d", &bend->quotas.max_filters,
++ "limits/max-buf-pages", "%d", &bend->quotas.max_buf_pages,
++ "limits/max-mcasts", "%d", &bend->quotas.max_mcasts,
++ NULL);
++ if (err) {
++ /*
++ * TODO what if they have previously been set by the
++ * user? This will overwrite with defaults. Maybe
++ * not what we want to do, but useful in startup
++ * case
++ */
++ DPRINTK("Failed to read quotas from xenbus, using defaults\n");
++ bend->quotas.max_filters = NETBACK_ACCEL_DEFAULT_MAX_FILTERS;
++ bend->quotas.max_buf_pages = sfc_netback_max_pages;
++ bend->quotas.max_mcasts = NETBACK_ACCEL_DEFAULT_MAX_MCASTS;
++ }
++
++ return;
++}
++
++
++static void bend_config_accel_change(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ struct netback_accel *bend;
++
++ bend = container_of(watch, struct netback_accel, config_accel_watch);
++
++ mutex_lock(&bend->bend_mutex);
++ if (bend->config_accel_watch.node != NULL) {
++ struct xenbus_device *dev =
++ (struct xenbus_device *)bend->hdev_data;
++ DPRINTK("Watch matched, got dev %p otherend %p\n",
++ dev, dev->otherend);
++ if(!xenbus_exists(XBT_NIL, watch->node, "")) {
++ DPRINTK("Ignoring watch as otherend seems invalid\n");
++ goto out;
++ }
++
++ cfg_hw_quotas(dev, bend);
++ }
++ out:
++ mutex_unlock(&bend->bend_mutex);
++ return;
++}
++
++
++/*
++ * Setup watch on "limits" in the backend vif info to know when
++ * configuration has been set
++ */
++static int setup_config_accel_watch(struct xenbus_device *dev,
++ struct netback_accel *bend)
++{
++ int err;
++
++ VPRINTK("Setting watch on %s/%s\n", dev->nodename, "limits");
++
++ err = xenbus_watch_path2(dev, dev->nodename, "limits",
++ &bend->config_accel_watch,
++ bend_config_accel_change);
++
++ if (err) {
++ EPRINTK("%s: Failed to register xenbus watch: %d\n",
++ __FUNCTION__, err);
++ bend->config_accel_watch.node = NULL;
++ return err;
++ }
++ return 0;
++}
++
++
++static int
++cfg_frontend_info(struct xenbus_device *dev, struct netback_accel *bend,
++ int *grants)
++{
++ /* Get some info from xenbus on the event channel and shmem grant */
++ int err = xenbus_gather(XBT_NIL, dev->otherend,
++ "accel-msg-channel", "%u", &bend->msg_channel,
++ "accel-ctrl-page", "%d", &(grants[0]),
++ "accel-msg-page", "%d", &(grants[1]),
++ "accel-net-channel", "%u", &bend->net_channel,
++ NULL);
++ if (err)
++ EPRINTK("failed to read event channels or shmem grant: %d\n",
++ err);
++ else
++ DPRINTK("got event chan %d and net chan %d from frontend\n",
++ bend->msg_channel, bend->net_channel);
++ return err;
++}
++
++
++/* Setup all the comms needed to chat with the front end driver */
++static int setup_vnic(struct xenbus_device *dev)
++{
++ struct netback_accel *bend;
++ int grants[2], err, msgs_per_queue;
++
++ bend = NETBACK_ACCEL_FROM_XENBUS_DEVICE(dev);
++
++ err = cfg_frontend_info(dev, bend, grants);
++ if (err)
++ goto fail1;
++
++ /*
++ * If we get here, both frontend Connected and configuration
++ * options available. All is well.
++ */
++
++ /* Get the hardware quotas for the VNIC in question. */
++ cfg_hw_quotas(dev, bend);
++
++ /* Set up the deferred work handlers */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ INIT_WORK(&bend->handle_msg,
++ netback_accel_msg_rx_handler);
++#else
++ INIT_WORK(&bend->handle_msg,
++ netback_accel_msg_rx_handler,
++ (void*)bend);
++#endif
++
++ /* Request the frontend mac */
++ err = net_accel_xen_net_read_mac(dev, bend->mac);
++ if (err)
++ goto fail2;
++
++ /* Set up the shared page. */
++ bend->shared_page = net_accel_map_grants_contig(dev, grants, 2,
++ &bend->sh_pages_unmap);
++
++ if (bend->shared_page == NULL) {
++ EPRINTK("failed to map shared page for %s\n", dev->otherend);
++ err = -ENOMEM;
++ goto fail2;
++ }
++
++ /* Initialise the shared page(s) used for comms */
++ net_accel_msg_init_page(bend->shared_page, PAGE_SIZE,
++ bend->net_dev->flags & IFF_UP);
++
++ msgs_per_queue = (PAGE_SIZE/2) / sizeof(struct net_accel_msg);
++
++ net_accel_msg_init_queue
++ (&bend->to_domU, &bend->shared_page->queue0,
++ (struct net_accel_msg *)((__u8*)bend->shared_page + PAGE_SIZE),
++ msgs_per_queue);
++
++ net_accel_msg_init_queue
++ (&bend->from_domU, &bend->shared_page->queue1,
++ (struct net_accel_msg *)((__u8*)bend->shared_page +
++ (3 * PAGE_SIZE / 2)),
++ msgs_per_queue);
++
++ /* Bind the message event channel to a handler
++ *
++ * Note that we will probably get a spurious interrupt when we
++ * do this, so it must not be done until we have set up
++ * everything we need to handle it.
++ */
++ err = bind_interdomain_evtchn_to_irqhandler(dev->otherend_id,
++ bend->msg_channel,
++ msgirq_from_frontend,
++ 0,
++ "netback_accel",
++ dev);
++ if (err < 0) {
++ EPRINTK("failed to bind event channel: %d\n", err);
++ goto fail3;
++ }
++ else
++ bend->msg_channel_irq = err;
++
++ /* TODO: No need to bind this evtchn to an irq. */
++ err = bind_interdomain_evtchn_to_irqhandler(dev->otherend_id,
++ bend->net_channel,
++ netirq_from_frontend,
++ 0,
++ "netback_accel",
++ dev);
++ if (err < 0) {
++ EPRINTK("failed to bind net channel: %d\n", err);
++ goto fail4;
++ }
++ else
++ bend->net_channel_irq = err;
++
++ /*
++ * Grab ourselves an entry in the forwarding hash table. We do
++ * this now so we don't have the embarassmesnt of sorting out
++ * an allocation failure while at IRQ. Because we pass NULL as
++ * the context, the actual hash lookup will succeed for this
++ * NIC, but the check for somewhere to forward to will
++ * fail. This is necessary to prevent forwarding before
++ * hardware resources are set up
++ */
++ err = netback_accel_fwd_add(bend->mac, NULL, bend->fwd_priv);
++ if (err) {
++ EPRINTK("failed to add to fwd hash table\n");
++ goto fail5;
++ }
++
++ /*
++ * Say hello to frontend. Important to do this straight after
++ * obtaining the message queue as otherwise we are vulnerable
++ * to an evil frontend sending a HELLO-REPLY before we've sent
++ * the HELLO and confusing us
++ */
++ netback_accel_msg_tx_hello(bend, NET_ACCEL_MSG_VERSION);
++ return 0;
++
++ fail5:
++ unbind_from_irqhandler(bend->net_channel_irq, dev);
++ fail4:
++ unbind_from_irqhandler(bend->msg_channel_irq, dev);
++ fail3:
++ net_accel_unmap_grants_contig(dev, bend->sh_pages_unmap);
++ bend->shared_page = NULL;
++ bend->sh_pages_unmap = NULL;
++ fail2:
++ fail1:
++ return err;
++}
++
++
++static int read_nicname(struct xenbus_device *dev, struct netback_accel *bend)
++{
++ int len;
++
++ /* nic name used to select interface used for acceleration */
++ bend->nicname = xenbus_read(XBT_NIL, dev->nodename, "accel", &len);
++ if (IS_ERR(bend->nicname))
++ return PTR_ERR(bend->nicname);
++
++ return 0;
++}
++
++static const char *frontend_name = "sfc_netfront";
++
++static int publish_frontend_name(struct xenbus_device *dev)
++{
++ struct xenbus_transaction tr;
++ int err;
++
++ /* Publish the name of the frontend driver */
++ do {
++ err = xenbus_transaction_start(&tr);
++ if (err != 0) {
++ EPRINTK("%s: transaction start failed\n", __FUNCTION__);
++ return err;
++ }
++ err = xenbus_printf(tr, dev->nodename, "accel-frontend",
++ "%s", frontend_name);
++ if (err != 0) {
++ EPRINTK("%s: xenbus_printf failed\n", __FUNCTION__);
++ xenbus_transaction_end(tr, 1);
++ return err;
++ }
++ err = xenbus_transaction_end(tr, 0);
++ } while (err == -EAGAIN);
++
++ if (err != 0) {
++ EPRINTK("failed to end frontend name transaction\n");
++ return err;
++ }
++ return 0;
++}
++
++
++static int unpublish_frontend_name(struct xenbus_device *dev)
++{
++ struct xenbus_transaction tr;
++ int err;
++
++ do {
++ err = xenbus_transaction_start(&tr);
++ if (err != 0)
++ break;
++ err = xenbus_rm(tr, dev->nodename, "accel-frontend");
++ if (err != 0) {
++ xenbus_transaction_end(tr, 1);
++ break;
++ }
++ err = xenbus_transaction_end(tr, 0);
++ } while (err == -EAGAIN);
++
++ return err;
++}
++
++
++static void cleanup_vnic(struct netback_accel *bend)
++{
++ struct xenbus_device *dev;
++
++ dev = (struct xenbus_device *)bend->hdev_data;
++
++ DPRINTK("%s: bend %p dev %p\n", __FUNCTION__, bend, dev);
++
++ DPRINTK("%s: Remove %p's mac from fwd table...\n",
++ __FUNCTION__, bend);
++ netback_accel_fwd_remove(bend->mac, bend->fwd_priv);
++
++ /* Free buffer table allocations */
++ netback_accel_remove_buffers(bend);
++
++ DPRINTK("%s: Release hardware resources...\n", __FUNCTION__);
++ if (bend->accel_shutdown)
++ bend->accel_shutdown(bend);
++
++ if (bend->net_channel_irq) {
++ unbind_from_irqhandler(bend->net_channel_irq, dev);
++ bend->net_channel_irq = 0;
++ }
++
++ if (bend->msg_channel_irq) {
++ unbind_from_irqhandler(bend->msg_channel_irq, dev);
++ bend->msg_channel_irq = 0;
++ }
++
++ if (bend->sh_pages_unmap) {
++ DPRINTK("%s: Unmap grants %p\n", __FUNCTION__,
++ bend->sh_pages_unmap);
++ net_accel_unmap_grants_contig(dev, bend->sh_pages_unmap);
++ bend->sh_pages_unmap = NULL;
++ bend->shared_page = NULL;
++ }
++}
++
++
++/*************************************************************************/
++
++/*
++ * The following code handles accelstate changes between the frontend
++ * and the backend. It calls setup_vnic and cleanup_vnic in matching
++ * pairs in response to transitions.
++ *
++ * Valid state transitions for Dom0 are as follows:
++ *
++ * Closed->Init on probe or in response to Init from domU
++ * Closed->Closing on error/remove
++ *
++ * Init->Connected in response to Connected from domU
++ * Init->Closing on error/remove or in response to Closing from domU
++ *
++ * Connected->Closing on error/remove or in response to Closing from domU
++ *
++ * Closing->Closed in response to Closed from domU
++ *
++ */
++
++
++static void netback_accel_frontend_changed(struct xenbus_device *dev,
++ XenbusState frontend_state)
++{
++ struct netback_accel *bend = NETBACK_ACCEL_FROM_XENBUS_DEVICE(dev);
++ XenbusState backend_state;
++
++ DPRINTK("%s: changing from %s to %s. nodename %s, otherend %s\n",
++ __FUNCTION__, xenbus_strstate(bend->frontend_state),
++ xenbus_strstate(frontend_state),dev->nodename, dev->otherend);
++
++ /*
++ * Ignore duplicate state changes. This can happen if the
++ * frontend changes state twice in quick succession and the
++ * first watch fires in the backend after the second
++ * transition has completed.
++ */
++ if (bend->frontend_state == frontend_state)
++ return;
++
++ bend->frontend_state = frontend_state;
++ backend_state = bend->backend_state;
++
++ switch (frontend_state) {
++ case XenbusStateInitialising:
++ if (backend_state == XenbusStateClosed &&
++ !bend->removing)
++ backend_state = XenbusStateInitialising;
++ break;
++
++ case XenbusStateConnected:
++ if (backend_state == XenbusStateInitialising) {
++ if (!bend->vnic_is_setup &&
++ setup_vnic(dev) == 0) {
++ bend->vnic_is_setup = 1;
++ backend_state = XenbusStateConnected;
++ } else {
++ backend_state = XenbusStateClosing;
++ }
++ }
++ break;
++
++ case XenbusStateInitWait:
++ case XenbusStateInitialised:
++ default:
++ DPRINTK("Unknown state %s (%d) from frontend.\n",
++ xenbus_strstate(frontend_state), frontend_state);
++ /* Unknown state. Fall through. */
++ case XenbusStateClosing:
++ if (backend_state != XenbusStateClosed)
++ backend_state = XenbusStateClosing;
++
++ /*
++ * The bend will now persist (with watches active) in
++ * case the frontend comes back again, eg. after
++ * frontend module reload or suspend/resume
++ */
++
++ break;
++
++ case XenbusStateUnknown:
++ case XenbusStateClosed:
++ if (bend->vnic_is_setup) {
++ bend->vnic_is_setup = 0;
++ cleanup_vnic(bend);
++ }
++
++ if (backend_state == XenbusStateClosing)
++ backend_state = XenbusStateClosed;
++ break;
++ }
++
++ if (backend_state != bend->backend_state) {
++ DPRINTK("Switching from state %s (%d) to %s (%d)\n",
++ xenbus_strstate(bend->backend_state),
++ bend->backend_state,
++ xenbus_strstate(backend_state), backend_state);
++ bend->backend_state = backend_state;
++ net_accel_update_state(dev, backend_state);
++ }
++
++ wake_up(&bend->state_wait_queue);
++}
++
++
++/* accelstate on the frontend's xenbus node has changed */
++static void bend_domu_accel_change(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ int state;
++ struct netback_accel *bend;
++
++ bend = container_of(watch, struct netback_accel, domu_accel_watch);
++ if (bend->domu_accel_watch.node != NULL) {
++ struct xenbus_device *dev =
++ (struct xenbus_device *)bend->hdev_data;
++ VPRINTK("Watch matched, got dev %p otherend %p\n",
++ dev, dev->otherend);
++ /*
++ * dev->otherend != NULL check to protect against
++ * watch firing when domain goes away and we haven't
++ * yet cleaned up
++ */
++ if (!dev->otherend ||
++ !xenbus_exists(XBT_NIL, watch->node, "") ||
++ strncmp(dev->otherend, vec[XS_WATCH_PATH],
++ strlen(dev->otherend))) {
++ DPRINTK("Ignoring watch as otherend seems invalid\n");
++ return;
++ }
++
++ mutex_lock(&bend->bend_mutex);
++
++ xenbus_scanf(XBT_NIL, dev->otherend, "accelstate", "%d",
++ &state);
++ netback_accel_frontend_changed(dev, state);
++
++ mutex_unlock(&bend->bend_mutex);
++ }
++}
++
++/* Setup watch on frontend's accelstate */
++static int setup_domu_accel_watch(struct xenbus_device *dev,
++ struct netback_accel *bend)
++{
++ int err;
++
++ VPRINTK("Setting watch on %s/%s\n", dev->otherend, "accelstate");
++
++ err = xenbus_watch_path2(dev, dev->otherend, "accelstate",
++ &bend->domu_accel_watch,
++ bend_domu_accel_change);
++ if (err) {
++ EPRINTK("%s: Failed to register xenbus watch: %d\n",
++ __FUNCTION__, err);
++ goto fail;
++ }
++ return 0;
++ fail:
++ bend->domu_accel_watch.node = NULL;
++ return err;
++}
++
++
++int netback_accel_probe(struct xenbus_device *dev)
++{
++ struct netback_accel *bend;
++ struct backend_info *binfo;
++ int err;
++
++ DPRINTK("%s: passed device %s\n", __FUNCTION__, dev->nodename);
++
++ /* Allocate structure to store all our state... */
++ bend = kzalloc(sizeof(struct netback_accel), GFP_KERNEL);
++ if (bend == NULL) {
++ DPRINTK("%s: no memory for bend\n", __FUNCTION__);
++ return -ENOMEM;
++ }
++
++ mutex_init(&bend->bend_mutex);
++
++ mutex_lock(&bend->bend_mutex);
++
++ /* ...and store it where we can get at it */
++ binfo = (struct backend_info *) dev->dev.driver_data;
++ binfo->netback_accel_priv = bend;
++ /* And vice-versa */
++ bend->hdev_data = dev;
++
++ DPRINTK("%s: Adding bend %p to list\n", __FUNCTION__, bend);
++
++ init_waitqueue_head(&bend->state_wait_queue);
++ bend->vnic_is_setup = 0;
++ bend->frontend_state = XenbusStateUnknown;
++ bend->backend_state = XenbusStateClosed;
++ bend->removing = 0;
++
++ sscanf(dev->nodename, NODENAME_PATH_FMT, &bend->far_end,
++ &bend->vif_num);
++
++ err = read_nicname(dev, bend);
++ if (err) {
++ /*
++ * Technically not an error, just means we're not
++ * supposed to accelerate this
++ */
++ DPRINTK("failed to get device name\n");
++ goto fail_nicname;
++ }
++
++ /*
++ * Look up the device name in the list of NICs provided by
++ * driverlink to get the hardware type.
++ */
++ err = netback_accel_sf_hwtype(bend);
++ if (err) {
++ /*
++ * Technically not an error, just means we're not
++ * supposed to accelerate this, probably belongs to
++ * some other backend
++ */
++ DPRINTK("failed to match device name\n");
++ goto fail_init_type;
++ }
++
++ err = publish_frontend_name(dev);
++ if (err)
++ goto fail_publish;
++
++ err = netback_accel_debugfs_create(bend);
++ if (err)
++ goto fail_debugfs;
++
++ mutex_unlock(&bend->bend_mutex);
++
++ err = setup_config_accel_watch(dev, bend);
++ if (err)
++ goto fail_config_watch;
++
++ err = setup_domu_accel_watch(dev, bend);
++ if (err)
++ goto fail_domu_watch;
++
++ /*
++ * Indicate to the other end that we're ready to start unless
++ * the watch has already fired.
++ */
++ mutex_lock(&bend->bend_mutex);
++ if (bend->backend_state == XenbusStateClosed) {
++ bend->backend_state = XenbusStateInitialising;
++ net_accel_update_state(dev, XenbusStateInitialising);
++ }
++ mutex_unlock(&bend->bend_mutex);
++
++ mutex_lock(&bend_list_mutex);
++ link_bend(bend);
++ mutex_unlock(&bend_list_mutex);
++
++ return 0;
++
++fail_domu_watch:
++
++ unregister_xenbus_watch(&bend->config_accel_watch);
++ kfree(bend->config_accel_watch.node);
++fail_config_watch:
++
++ /*
++ * Flush the scheduled work queue before freeing bend to get
++ * rid of any pending netback_accel_msg_rx_handler()
++ */
++ flush_scheduled_work();
++
++ mutex_lock(&bend->bend_mutex);
++ net_accel_update_state(dev, XenbusStateUnknown);
++ netback_accel_debugfs_remove(bend);
++fail_debugfs:
++
++ unpublish_frontend_name(dev);
++fail_publish:
++
++ /* No need to reverse netback_accel_sf_hwtype. */
++fail_init_type:
++
++ kfree(bend->nicname);
++fail_nicname:
++ binfo->netback_accel_priv = NULL;
++ mutex_unlock(&bend->bend_mutex);
++ kfree(bend);
++ return err;
++}
++
++
++int netback_accel_remove(struct xenbus_device *dev)
++{
++ struct backend_info *binfo;
++ struct netback_accel *bend;
++ int frontend_state;
++
++ binfo = (struct backend_info *) dev->dev.driver_data;
++ bend = (struct netback_accel *) binfo->netback_accel_priv;
++
++ DPRINTK("%s: dev %p bend %p\n", __FUNCTION__, dev, bend);
++
++ BUG_ON(bend == NULL);
++
++ mutex_lock(&bend_list_mutex);
++ unlink_bend(bend);
++ mutex_unlock(&bend_list_mutex);
++
++ mutex_lock(&bend->bend_mutex);
++
++ /* Reject any requests to connect. */
++ bend->removing = 1;
++
++ /*
++ * Switch to closing to tell the other end that we're going
++ * away.
++ */
++ if (bend->backend_state != XenbusStateClosing) {
++ bend->backend_state = XenbusStateClosing;
++ net_accel_update_state(dev, XenbusStateClosing);
++ }
++
++ frontend_state = (int)XenbusStateUnknown;
++ xenbus_scanf(XBT_NIL, dev->otherend, "accelstate", "%d",
++ &frontend_state);
++
++ mutex_unlock(&bend->bend_mutex);
++
++ /*
++ * Wait until this end goes to the closed state. This happens
++ * in response to the other end going to the closed state.
++ * Don't bother doing this if the other end is already closed
++ * because if it is then there is nothing to do.
++ */
++ if (frontend_state != (int)XenbusStateClosed &&
++ frontend_state != (int)XenbusStateUnknown)
++ wait_event(bend->state_wait_queue,
++ bend->backend_state == XenbusStateClosed);
++
++ unregister_xenbus_watch(&bend->domu_accel_watch);
++ kfree(bend->domu_accel_watch.node);
++
++ unregister_xenbus_watch(&bend->config_accel_watch);
++ kfree(bend->config_accel_watch.node);
++
++ /*
++ * Flush the scheduled work queue before freeing bend to get
++ * rid of any pending netback_accel_msg_rx_handler()
++ */
++ flush_scheduled_work();
++
++ mutex_lock(&bend->bend_mutex);
++
++ /* Tear down the vnic if it was set up. */
++ if (bend->vnic_is_setup) {
++ bend->vnic_is_setup = 0;
++ cleanup_vnic(bend);
++ }
++
++ bend->backend_state = XenbusStateUnknown;
++ net_accel_update_state(dev, XenbusStateUnknown);
++
++ netback_accel_debugfs_remove(bend);
++
++ unpublish_frontend_name(dev);
++
++ kfree(bend->nicname);
++
++ binfo->netback_accel_priv = NULL;
++
++ mutex_unlock(&bend->bend_mutex);
++
++ kfree(bend);
++
++ return 0;
++}
++
++
++void netback_accel_shutdown_bends(void)
++{
++ mutex_lock(&bend_list_mutex);
++ /*
++ * I think we should have had a remove callback for all
++ * interfaces before being allowed to unload the module
++ */
++ BUG_ON(bend_list != NULL);
++ mutex_unlock(&bend_list_mutex);
++}
++
++
++void netback_accel_set_closing(struct netback_accel *bend)
++{
++
++ bend->backend_state = XenbusStateClosing;
++ net_accel_update_state((struct xenbus_device *)bend->hdev_data,
++ XenbusStateClosing);
++}
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/compat.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/compat.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,53 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr
++ * \brief Compatability layer. Provides definitions of fundamental
++ * types and definitions that are used throughout CI source
++ * code. It does not introduce any link time dependencies,
++ * or include any unnecessary system headers.
++ */
++/*! \cidoxg_include_ci */
++
++#ifndef __CI_COMPAT_H__
++#define __CI_COMPAT_H__
++
++#ifdef __cplusplus
++extern "C" {
++#endif
++
++#include <ci/compat/primitive.h>
++#include <ci/compat/sysdep.h>
++#include <ci/compat/utils.h>
++
++
++#ifdef __cplusplus
++}
++#endif
++
++#endif /* __CI_COMPAT_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/compat/gcc.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/compat/gcc.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,158 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*! \cidoxg_include_ci_compat */
++
++#ifndef __CI_COMPAT_GCC_H__
++#define __CI_COMPAT_GCC_H__
++
++
++#define CI_HAVE_INT64
++
++
++#if defined(__linux__) && defined(__KERNEL__)
++
++# include <linux/types.h>
++
++typedef __u64 ci_uint64;
++typedef __s64 ci_int64;
++# if BITS_PER_LONG == 32
++typedef __s32 ci_ptr_arith_t;
++typedef __u32 ci_uintptr_t;
++# else
++typedef __s64 ci_ptr_arith_t;
++typedef __u64 ci_uintptr_t;
++# endif
++
++
++/* it's not obvious to me why the below is wrong for x64_64, but
++ * gcc seems to complain on this platform
++ */
++# if defined(__ia64__)
++# define CI_PRId64 "ld"
++# define CI_PRIi64 "li"
++# define CI_PRIo64 "lo"
++# define CI_PRIu64 "lu"
++# define CI_PRIx64 "lx"
++# define CI_PRIX64 "lX"
++# else
++# define CI_PRId64 "lld"
++# define CI_PRIi64 "lli"
++# define CI_PRIo64 "llo"
++# define CI_PRIu64 "llu"
++# define CI_PRIx64 "llx"
++# define CI_PRIX64 "llX"
++# endif
++
++# define CI_PRId32 "d"
++# define CI_PRIi32 "i"
++# define CI_PRIo32 "o"
++# define CI_PRIu32 "u"
++# define CI_PRIx32 "x"
++# define CI_PRIX32 "X"
++
++#else
++
++# include <stdint.h>
++# include <inttypes.h>
++
++typedef uint64_t ci_uint64;
++typedef int64_t ci_int64;
++typedef intptr_t ci_ptr_arith_t;
++typedef uintptr_t ci_uintptr_t;
++
++# define CI_PRId64 PRId64
++# define CI_PRIi64 PRIi64
++# define CI_PRIo64 PRIo64
++# define CI_PRIu64 PRIu64
++# define CI_PRIx64 PRIx64
++# define CI_PRIX64 PRIX64
++
++# define CI_PRId32 PRId32
++# define CI_PRIi32 PRIi32
++# define CI_PRIo32 PRIo32
++# define CI_PRIu32 PRIu32
++# define CI_PRIx32 PRIx32
++# define CI_PRIX32 PRIX32
++
++#endif
++
++
++typedef ci_uint64 ci_fixed_descriptor_t;
++
++#define from_fixed_descriptor(desc) ((ci_uintptr_t)(desc))
++#define to_fixed_descriptor(desc) ((ci_fixed_descriptor_t)(ci_uintptr_t)(desc))
++
++
++#if __GNUC__ >= 3 && !defined(__cplusplus)
++/*
++** Checks that [p_mbr] has the same type as [&c_type::mbr_name].
++*/
++# define CI_CONTAINER(c_type, mbr_name, p_mbr) \
++ __builtin_choose_expr( \
++ __builtin_types_compatible_p(__typeof__(&((c_type*)0)->mbr_name), \
++ __typeof__(p_mbr)), \
++ __CI_CONTAINER(c_type, mbr_name, p_mbr), (void)0)
++
++# define ci_restrict __restrict__
++#endif
++
++
++#if !defined(__KERNEL__) || defined(__unix__)
++#define CI_HAVE_NPRINTF 1
++#endif
++
++
++/* At what version was this introduced? */
++#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ > 91)
++# define CI_LIKELY(t) __builtin_expect((t), 1)
++# define CI_UNLIKELY(t) __builtin_expect((t), 0)
++#endif
++
++/**********************************************************************
++ * Attributes
++ */
++#if __GNUC__ >= 3 && defined(NDEBUG)
++# define CI_HF __attribute__((visibility("hidden")))
++# define CI_HV __attribute__((visibility("hidden")))
++#else
++# define CI_HF
++# define CI_HV
++#endif
++
++#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
++# define ci_noinline static __attribute__((__noinline__))
++/* (Linux 2.6 defines its own "noinline", so we use the "__noinline__" form) */
++#else
++# define ci_noinline static
++#endif
++
++#define CI_ALIGN(x) __attribute__ ((aligned (x)))
++
++#define CI_PRINTF_LIKE(a,b) __attribute__((format(printf,a,b)))
++
++#endif /* __CI_COMPAT_GCC_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/compat/gcc_x86.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/compat/gcc_x86.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,115 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*! \cidoxg_include_ci_compat */
++
++#ifndef __CI_COMPAT_GCC_X86_H__
++#define __CI_COMPAT_GCC_X86_H__
++
++/*
++** The facts:
++**
++** SSE sfence
++** SSE2 lfence, mfence, pause
++*/
++
++/*
++ Barriers to enforce ordering with respect to:
++
++ normal memory use: ci_wmb, ci_rmb, ci_wmb
++ IO bus access use: ci_wiob, ci_riob, ci_iob
++*/
++#if defined(__x86_64__)
++# define ci_x86_mb() __asm__ __volatile__ ("lock; addl $0,0(%%rsp)":::"memory")
++#else
++# define ci_x86_mb() __asm__ __volatile__ ("lock; addl $0,0(%%esp)":::"memory")
++#endif
++
++/* ?? measure the impact of latency of sfence on a modern processor before we
++ take a decision on how to integrate with respect to writecombining */
++
++/* DJR: I don't think we need to add "memory" here. It means the asm does
++** something to memory that GCC doesn't understand. But all this does is
++** commit changes that GCC thinks have already happened. NB. GCC will not
++** reorder across a __volatile__ __asm__ anyway.
++*/
++#define ci_gcc_fence() __asm__ __volatile__ ("")
++
++#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
++# define ci_x86_sfence() __asm__ __volatile__ ("sfence")
++# define ci_x86_lfence() __asm__ __volatile__ ("lfence")
++# define ci_x86_mfence() __asm__ __volatile__ ("mfence")
++#else
++# define ci_x86_sfence() __asm__ __volatile__ (".byte 0x0F, 0xAE, 0xF8")
++# define ci_x86_lfence() __asm__ __volatile__ (".byte 0x0F, 0xAE, 0xE8")
++# define ci_x86_mfence() __asm__ __volatile__ (".byte 0x0F, 0xAE, 0xF0")
++#endif
++
++
++/* x86 processors to P4 Xeon store in-order unless executing streaming
++ extensions or when using writecombining
++
++ Hence we do not define ci_wmb to use sfence by default. Requirement is that
++ we do not use writecombining to memory and any code which uses SSE
++ extensions must call sfence directly
++
++ We need to track non intel clones which may support out of order store.
++
++*/
++
++#if CI_CPU_OOS
++# if CI_CPU_HAS_SSE
++# define ci_wmb() ci_x86_sfence()
++# else
++# define ci_wmb() ci_x86_mb()
++# endif
++#else
++# define ci_wmb() ci_gcc_fence()
++#endif
++
++#if CI_CPU_HAS_SSE2
++# define ci_rmb() ci_x86_lfence()
++# define ci_mb() ci_x86_mfence()
++# define ci_riob() ci_x86_lfence()
++# define ci_wiob() ci_x86_sfence()
++# define ci_iob() ci_x86_mfence()
++#else
++# if CI_CPU_HAS_SSE
++# define ci_wiob() ci_x86_sfence()
++# else
++# define ci_wiob() ci_x86_mb()
++# endif
++# define ci_rmb() ci_x86_mb()
++# define ci_mb() ci_x86_mb()
++# define ci_riob() ci_x86_mb()
++# define ci_iob() ci_x86_mb()
++#endif
++
++typedef unsigned long ci_phys_addr_t;
++#define ci_phys_addr_fmt "%lx"
++
++#endif /* __CI_COMPAT_GCC_X86_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/compat/primitive.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/compat/primitive.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,77 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++/*! \cidoxg_include_ci_compat */
++
++#ifndef __CI_COMPAT_PRIMITIVE_H__
++#define __CI_COMPAT_PRIMITIVE_H__
++
++
++/**********************************************************************
++ * Primitive types.
++ */
++
++typedef unsigned char ci_uint8;
++typedef char ci_int8;
++
++typedef unsigned short ci_uint16;
++typedef short ci_int16;
++
++typedef unsigned int ci_uint32;
++typedef int ci_int32;
++
++/* 64-bit support is platform dependent. */
++
++
++/**********************************************************************
++ * Other fancy types.
++ */
++
++typedef ci_uint8 ci_octet;
++
++typedef enum {
++ CI_FALSE = 0,
++ CI_TRUE
++} ci_boolean_t;
++
++
++/**********************************************************************
++ * Some nice types you'd always assumed were standards.
++ * (Really, they are SYSV "standards".)
++ */
++
++#ifdef _WIN32
++typedef unsigned long ulong;
++typedef unsigned int uint;
++typedef char* caddr_t;
++#elif defined(__linux__) && defined(__KERNEL__)
++#include <linux/types.h>
++#elif defined(__linux__)
++#include <sys/types.h>
++#endif
++
++
++#endif /* __CI_COMPAT_PRIMITIVE_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/compat/sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/compat/sysdep.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,166 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*! \cidoxg_include_ci_compat */
++
++#ifndef __CI_COMPAT_SYSDEP_H__
++#define __CI_COMPAT_SYSDEP_H__
++
++
++/**********************************************************************
++ * Platform definition fixups.
++ */
++
++#if defined(__ci_ul_driver__) && !defined(__ci_driver__)
++# define __ci_driver__
++#endif
++
++#if defined(__ci_driver__) && !defined(__ci_ul_driver__) && \
++ !defined(__KERNEL__)
++# define __KERNEL__
++#endif
++
++
++/**********************************************************************
++ * Sanity checks (no cheating!)
++ */
++
++#if defined(__KERNEL__) && !defined(__ci_driver__)
++# error Insane.
++#endif
++
++#if defined(__KERNEL__) && defined(__ci_ul_driver__)
++# error Madness.
++#endif
++
++#if defined(__unix__) && defined(_WIN32)
++# error Strange.
++#endif
++
++#if defined(__GNUC__) && defined(_MSC_VER)
++# error Crazy.
++#endif
++
++
++/**********************************************************************
++ * Compiler and processor dependencies.
++ */
++
++#if defined(__GNUC__)
++
++# include <ci/compat/gcc.h>
++
++# if defined(__i386__)
++# include <ci/compat/x86.h>
++# include <ci/compat/gcc_x86.h>
++# elif defined(__x86_64__)
++# include <ci/compat/x86_64.h>
++# include <ci/compat/gcc_x86.h>
++# elif defined(__PPC__)
++# include <ci/compat/ppc.h>
++# include <ci/compat/gcc_ppc.h>
++# elif defined(__ia64__)
++# include <ci/compat/ia64.h>
++# include <ci/compat/gcc_ia64.h>
++# else
++# error Unknown processor - GNU C
++# endif
++
++#elif defined(_MSC_VER)
++
++# include <ci/compat/msvc.h>
++
++# if defined(__i386__)
++# include <ci/compat/x86.h>
++# include <ci/compat/msvc_x86.h>
++# elif defined(__x86_64__)
++# include <ci/compat/x86_64.h>
++# include <ci/compat/msvc_x86_64.h>
++# else
++# error Unknown processor MSC
++# endif
++
++#elif defined(__PGI)
++
++# include <ci/compat/x86.h>
++# include <ci/compat/pg_x86.h>
++
++#elif defined(__INTEL_COMPILER)
++
++/* Intel compilers v7 claim to be very gcc compatible. */
++# if __INTEL_COMPILER >= 700
++# include <ci/compat/gcc.h>
++# include <ci/compat/x86.h>
++# include <ci/compat/gcc_x86.h>
++# else
++# error Old Intel compiler not supported. Yet.
++# endif
++
++#else
++# error Unknown compiler.
++#endif
++
++
++/**********************************************************************
++ * Misc stuff (that probably shouldn't be here).
++ */
++
++#ifdef __sun
++# ifdef __KERNEL__
++# define _KERNEL
++# define _SYSCALL32
++# ifdef _LP64
++# define _SYSCALL32_IMPL
++# endif
++# else
++# define _REENTRANT
++# endif
++#endif
++
++
++/**********************************************************************
++ * Defaults for anything left undefined.
++ */
++
++#ifndef CI_LIKELY
++# define CI_LIKELY(t) (t)
++# define CI_UNLIKELY(t) (t)
++#endif
++
++#ifndef ci_restrict
++# define ci_restrict
++#endif
++
++#ifndef ci_inline
++# define ci_inline static inline
++#endif
++
++#ifndef ci_noinline
++# define ci_noinline static
++#endif
++
++#endif /* __CI_COMPAT_SYSDEP_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/compat/utils.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/compat/utils.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,269 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr
++ * \brief Handy utility macros.
++ * \date 2003/01/17
++ */
++
++/*! \cidoxg_include_ci_compat */
++
++#ifndef __CI_COMPAT_UTILS_H__
++#define __CI_COMPAT_UTILS_H__
++
++
++/**********************************************************************
++ * Alignment -- [align] must be a power of 2.
++ **********************************************************************/
++
++ /*! Align forward onto next boundary. */
++
++#define CI_ALIGN_FWD(p, align) (((p)+(align)-1u) & ~((align)-1u))
++
++
++ /*! Align back onto prev boundary. */
++
++#define CI_ALIGN_BACK(p, align) ((p) & ~((align)-1u))
++
++
++ /*! How far to next boundary? */
++
++#define CI_ALIGN_NEEDED(p, align, signed_t) (-(signed_t)(p) & ((align)-1u))
++
++
++ /*! How far beyond prev boundary? */
++
++#define CI_OFFSET(p, align) ((p) & ((align)-1u))
++
++
++ /*! Does object fit in gap before next boundary? */
++
++#define CI_FITS(p, size, align, signed_t) \
++ (CI_ALIGN_NEEDED((p) + 1, (align), signed_t) + 1 >= (size))
++
++
++ /*! Align forward onto next boundary. */
++
++#define CI_PTR_ALIGN_FWD(p, align) \
++ ((char*) CI_ALIGN_FWD(((ci_ptr_arith_t)(p)), ((ci_ptr_arith_t)(align))))
++
++ /*! Align back onto prev boundary. */
++
++#define CI_PTR_ALIGN_BACK(p, align) \
++ ((char*) CI_ALIGN_BACK(((ci_ptr_arith_t)(p)), ((ci_ptr_arith_t)(align))))
++
++ /*! How far to next boundary? */
++
++#define CI_PTR_ALIGN_NEEDED(p, align) \
++ CI_ALIGN_NEEDED(((ci_ptr_arith_t)(p)), ((ci_ptr_arith_t)(align)), \
++ ci_ptr_arith_t)
++
++ /*! How far to next boundary? NZ = not zero i.e. give align if on boundary */
++
++#define CI_PTR_ALIGN_NEEDED_NZ(p, align) \
++ ((align) - (((char*)p) - \
++ ((char*) CI_ALIGN_BACK(((ci_ptr_arith_t)(p)), ((ci_ptr_arith_t)(align))))))
++
++ /*! How far beyond prev boundary? */
++
++#define CI_PTR_OFFSET(p, align) \
++ CI_OFFSET(((ci_ptr_arith_t)(p)), ((ci_ptr_arith_t)(align)))
++
++
++ /* Same as CI_ALIGN_FWD and CI_ALIGN_BACK. */
++
++#define CI_ROUND_UP(i, align) (((i)+(align)-1u) & ~((align)-1u))
++
++#define CI_ROUND_DOWN(i, align) ((i) & ~((align)-1u))
++
++
++/**********************************************************************
++ * Byte-order
++ **********************************************************************/
++
++/* These are not flags. They are enumeration values for use with
++ * CI_MY_BYTE_ORDER. */
++#define CI_BIG_ENDIAN 1
++#define CI_LITTLE_ENDIAN 0
++
++/*
++** Note that these byte-swapping primitives may leave junk in bits above
++** the range they operate on.
++**
++** The CI_BSWAP_nn() routines require that bits above [nn] are zero. Use
++** CI_BSWAPM_nn(x) if this cannot be guaranteed.
++*/
++
++/* ?? May be able to improve on some of these with inline assembler on some
++** platforms.
++*/
++
++#define CI_BSWAP_16(v) ((((v) & 0xff) << 8) | ((v) >> 8))
++#define CI_BSWAPM_16(v) ((((v) & 0xff) << 8) | (((v) & 0xff00) >> 8))
++
++#define CI_BSWAP_32(v) (((v) >> 24) | \
++ (((v) & 0x00ff0000) >> 8) | \
++ (((v) & 0x0000ff00) << 8) | \
++ ((v) << 24))
++#define CI_BSWAPM_32(v) ((((v) & 0xff000000) >> 24) | \
++ (((v) & 0x00ff0000) >> 8) | \
++ (((v) & 0x0000ff00) << 8) | \
++ ((v) << 24))
++
++#define CI_BSWAP_64(v) (((v) >> 56) | \
++ (((v) & 0x00ff000000000000) >> 40) | \
++ (((v) & 0x0000ff0000000000) >> 24) | \
++ (((v) & 0x000000ff00000000) >> 8) | \
++ (((v) & 0x00000000ff000000) << 8) | \
++ (((v) & 0x0000000000ff0000) << 24) | \
++ (((v) & 0x000000000000ff00) << 40) | \
++ ((v) << 56))
++
++# define CI_BSWAPPED_16_IF(c,v) ((c) ? CI_BSWAP_16(v) : (v))
++# define CI_BSWAPPED_32_IF(c,v) ((c) ? CI_BSWAP_32(v) : (v))
++# define CI_BSWAPPED_64_IF(c,v) ((c) ? CI_BSWAP_64(v) : (v))
++# define CI_BSWAP_16_IF(c,v) do{ if((c)) (v) = CI_BSWAP_16(v); }while(0)
++# define CI_BSWAP_32_IF(c,v) do{ if((c)) (v) = CI_BSWAP_32(v); }while(0)
++# define CI_BSWAP_64_IF(c,v) do{ if((c)) (v) = CI_BSWAP_64(v); }while(0)
++
++#if (CI_MY_BYTE_ORDER == CI_LITTLE_ENDIAN)
++# define CI_BSWAP_LE16(v) (v)
++# define CI_BSWAP_LE32(v) (v)
++# define CI_BSWAP_LE64(v) (v)
++# define CI_BSWAP_BE16(v) CI_BSWAP_16(v)
++# define CI_BSWAP_BE32(v) CI_BSWAP_32(v)
++# define CI_BSWAP_BE64(v) CI_BSWAP_64(v)
++# define CI_BSWAPM_LE16(v) (v)
++# define CI_BSWAPM_LE32(v) (v)
++# define CI_BSWAPM_LE64(v) (v)
++# define CI_BSWAPM_BE16(v) CI_BSWAPM_16(v)
++# define CI_BSWAPM_BE32(v) CI_BSWAPM_32(v)
++#elif (CI_MY_BYTE_ORDER == CI_BIG_ENDIAN)
++# define CI_BSWAP_BE16(v) (v)
++# define CI_BSWAP_BE32(v) (v)
++# define CI_BSWAP_BE64(v) (v)
++# define CI_BSWAP_LE16(v) CI_BSWAP_16(v)
++# define CI_BSWAP_LE32(v) CI_BSWAP_32(v)
++# define CI_BSWAP_LE64(v) CI_BSWAP_64(v)
++# define CI_BSWAPM_BE16(v) (v)
++# define CI_BSWAPM_BE32(v) (v)
++# define CI_BSWAPM_BE64(v) (v)
++# define CI_BSWAPM_LE16(v) CI_BSWAPM_16(v)
++# define CI_BSWAPM_LE32(v) CI_BSWAPM_32(v)
++#else
++# error Bad endian.
++#endif
++
++
++/**********************************************************************
++ * Get pointer to struct from pointer to member
++ **********************************************************************/
++
++#define CI_MEMBER_OFFSET(c_type, mbr_name) \
++ ((ci_uint32) (ci_uintptr_t)(&((c_type*)0)->mbr_name))
++
++#define CI_MEMBER_SIZE(c_type, mbr_name) \
++ sizeof(((c_type*)0)->mbr_name)
++
++#define __CI_CONTAINER(c_type, mbr_name, p_mbr) \
++ ( (c_type*) ((char*)(p_mbr) - CI_MEMBER_OFFSET(c_type, mbr_name)) )
++
++#ifndef CI_CONTAINER
++# define CI_CONTAINER(t,m,p) __CI_CONTAINER(t,m,p)
++#endif
++
++
++/**********************************************************************
++ * Structure member initialiser.
++ **********************************************************************/
++
++#ifndef CI_STRUCT_MBR
++# define CI_STRUCT_MBR(name, val) .name = val
++#endif
++
++
++/**********************************************************************
++ * min / max
++ **********************************************************************/
++
++#define CI_MIN(x,y) (((x) < (y)) ? (x) : (y))
++#define CI_MAX(x,y) (((x) > (y)) ? (x) : (y))
++
++/**********************************************************************
++ * abs
++ **********************************************************************/
++
++#define CI_ABS(x) (((x) < 0) ? -(x) : (x))
++
++/**********************************************************************
++ * Conditional debugging
++ **********************************************************************/
++
++#ifdef NDEBUG
++# define CI_DEBUG(x)
++# define CI_NDEBUG(x) x
++# define CI_IF_DEBUG(y,n) (n)
++# define CI_DEBUG_ARG(x)
++#else
++# define CI_DEBUG(x) x
++# define CI_NDEBUG(x)
++# define CI_IF_DEBUG(y,n) (y)
++# define CI_DEBUG_ARG(x) ,x
++#endif
++
++#ifdef __KERNEL__
++#define CI_KERNEL_ARG(x) ,x
++#else
++#define CI_KERNEL_ARG(x)
++#endif
++
++#ifdef _WIN32
++# define CI_KERNEL_ARG_WIN(x) CI_KERNEL_ARG(x)
++# define CI_ARG_WIN(x) ,x
++#else
++# define CI_KERNEL_ARG_WIN(x)
++# define CI_ARG_WIN(x)
++#endif
++
++#ifdef __unix__
++# define CI_KERNEL_ARG_UNIX(x) CI_KERNEL_ARG(x)
++# define CI_ARG_UNIX(x) ,x
++#else
++# define CI_KERNEL_ARG_UNIX(x)
++# define CI_ARG_UNIX(x)
++#endif
++
++#ifdef __linux__
++# define CI_KERNEL_ARG_LINUX(x) CI_KERNEL_ARG(x)
++# define CI_ARG_LINUX(x) ,x
++#else
++# define CI_KERNEL_ARG_LINUX(x)
++# define CI_ARG_LINUX(x)
++#endif
++
++
++#endif /* __CI_COMPAT_UTILS_H__ */
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/compat/x86.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/compat/x86.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,48 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*! \cidoxg_include_ci_compat */
++
++#ifndef __CI_COMPAT_X86_H__
++#define __CI_COMPAT_X86_H__
++
++
++#define CI_MY_BYTE_ORDER CI_LITTLE_ENDIAN
++
++#define CI_WORD_SIZE 4
++#define CI_PTR_SIZE 4
++
++#define CI_PAGE_SIZE 4096
++#define CI_PAGE_SHIFT 12
++#define CI_PAGE_MASK (~(CI_PAGE_SIZE - 1))
++
++#define CI_CPU_HAS_SSE 1 /* SSE extensions supported */
++#define CI_CPU_HAS_SSE2 0 /* SSE2 extensions supported */
++#define CI_CPU_OOS 0 /* CPU does out of order stores */
++
++
++#endif /* __CI_COMPAT_X86_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/compat/x86_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/compat/x86_64.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,54 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr
++ * \brief Arch stuff for AMD x86_64.
++ * \date 2004/08/17
++ */
++
++/*! \cidoxg_include_ci_compat */
++#ifndef __CI_COMPAT_X86_64_H__
++#define __CI_COMPAT_X86_64_H__
++
++
++#define CI_MY_BYTE_ORDER CI_LITTLE_ENDIAN
++
++#define CI_WORD_SIZE 8
++#define CI_PTR_SIZE 8
++
++#define CI_PAGE_SIZE 4096
++#define CI_PAGE_SHIFT 12
++#define CI_PAGE_MASK (~(CI_PAGE_SIZE - 1))
++
++#define CI_CPU_HAS_SSE 1 /* SSE extensions supported */
++
++/* SSE2 disabled while investigating BUG1060 */
++#define CI_CPU_HAS_SSE2 0 /* SSE2 extensions supported */
++#define CI_CPU_OOS 0 /* CPU does out of order stores */
++
++
++#endif /* __CI_COMPAT_X86_64_H__ */
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/driver/resource/efx_vi.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/driver/resource/efx_vi.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,276 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file contains public EFX VI API to Solarflare resource manager.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_DRIVER_RESOURCE_EFX_VI_H__
++#define __CI_DRIVER_RESOURCE_EFX_VI_H__
++
++/* Default size of event queue in the efx_vi resource. Copied from
++ * CI_CFG_NETIF_EVENTQ_SIZE */
++#define EFX_VI_EVENTQ_SIZE_DEFAULT 1024
++
++extern int efx_vi_eventq_size;
++
++/**************************************************************************
++ * efx_vi_state types, allocation and free
++ **************************************************************************/
++
++/*! Handle for refering to a efx_vi */
++struct efx_vi_state;
++
++/*!
++ * Allocate an efx_vi, including event queue and pt_endpoint
++ *
++ * \param vih_out Pointer to a handle that is set on success
++ * \param nic_index Index of NIC to apply this resource to
++ * \return Zero on success (and vih_out set), non-zero on failure.
++ */
++extern int
++efx_vi_alloc(struct efx_vi_state **vih_out, int nic_index);
++
++/*!
++ * Free a previously allocated efx_vi
++ *
++ * \param vih The handle of the efx_vi to free
++ */
++extern void
++efx_vi_free(struct efx_vi_state *vih);
++
++/*!
++ * Reset a previously allocated efx_vi
++ *
++ * \param vih The handle of the efx_vi to reset
++ */
++extern void
++efx_vi_reset(struct efx_vi_state *vih);
++
++/**************************************************************************
++ * efx_vi_eventq types and functions
++ **************************************************************************/
++
++/*!
++ * Register a function to receive callbacks when event queue timeouts
++ * or wakeups occur. Only one function per efx_vi can be registered
++ * at once.
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param callback The function to callback
++ * \param context An argument to pass to the callback function
++ * \return Zero on success, non-zero on failure.
++ */
++extern int
++efx_vi_eventq_register_callback(struct efx_vi_state *vih,
++ void (*callback)(void *context, int is_timeout),
++ void *context);
++
++/*!
++ * Remove the current eventq timeout or wakeup callback function
++ *
++ * \param vih The handle to identify the efx_vi
++ * \return Zero on success, non-zero on failure
++ */
++extern int
++efx_vi_eventq_kill_callback(struct efx_vi_state *vih);
++
++/**************************************************************************
++ * efx_vi_dma_map types and functions
++ **************************************************************************/
++
++/*!
++ * Handle for refering to a efx_vi
++ */
++struct efx_vi_dma_map_state;
++
++/*!
++ * Map a list of buffer pages so they are registered with the hardware
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param addrs An array of page pointers to map
++ * \param n_addrs Length of the page pointer array. Must be a power of two.
++ * \param dmh_out Set on success to a handle used to refer to this mapping
++ * \return Zero on success, non-zero on failure.
++ */
++extern int
++efx_vi_dma_map_pages(struct efx_vi_state *vih, struct page **pages,
++ int n_pages, struct efx_vi_dma_map_state **dmh_out);
++extern int
++efx_vi_dma_map_addrs(struct efx_vi_state *vih,
++ unsigned long long *dev_bus_addrs, int n_pages,
++ struct efx_vi_dma_map_state **dmh_out);
++
++/*!
++ * Unmap a previously mapped set of pages so they are no longer registered
++ * with the hardware.
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param dmh The handle to identify the dma mapping
++ */
++extern void
++efx_vi_dma_unmap_pages(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh);
++extern void
++efx_vi_dma_unmap_addrs(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh);
++
++/*!
++ * Retrieve the buffer address of the mapping
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param dmh The handle to identify the buffer mapping
++ * \return The buffer address on success, or zero on failure
++ */
++extern unsigned
++efx_vi_dma_get_map_addr(struct efx_vi_state *vih,
++ struct efx_vi_dma_map_state *dmh);
++
++/**************************************************************************
++ * efx_vi filter functions
++ **************************************************************************/
++
++#define EFX_VI_STATIC_FILTERS 32
++
++/*! Handle to refer to a filter instance */
++struct filter_resource_t;
++
++/*!
++ * Allocate and add a filter
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param protocol The protocol of the new filter: UDP or TCP
++ * \param ip_addr_be32 The local ip address of the filter
++ * \param port_le16 The local port of the filter
++ * \param fh_out Set on success to be a handle to refer to this filter
++ * \return Zero on success, non-zero on failure.
++ */
++extern int
++efx_vi_filter(struct efx_vi_state *vih, int protocol, unsigned ip_addr_be32,
++ int port_le16, struct filter_resource_t **fh_out);
++
++/*!
++ * Remove a filter and free resources associated with it
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param fh The handle to identify the filter
++ * \return Zero on success, non-zero on failure
++ */
++extern int
++efx_vi_filter_stop(struct efx_vi_state *vih, struct filter_resource_t *fh);
++
++/**************************************************************************
++ * efx_vi hw resources types and functions
++ **************************************************************************/
++
++/*! Constants for the type field in efx_vi_hw_resource */
++#define EFX_VI_HW_RESOURCE_TXDMAQ 0x0 /* PFN of TX DMA Q */
++#define EFX_VI_HW_RESOURCE_RXDMAQ 0x1 /* PFN of RX DMA Q */
++#define EFX_VI_HW_RESOURCE_TXBELL 0x2 /* PFN of TX Doorbell (EF1) */
++#define EFX_VI_HW_RESOURCE_RXBELL 0x3 /* PFN of RX Doorbell (EF1) */
++#define EFX_VI_HW_RESOURCE_EVQTIMER 0x4 /* Address of event q timer */
++
++/* Address of event q pointer (EF1) */
++#define EFX_VI_HW_RESOURCE_EVQPTR 0x5
++/* Address of register pointer (Falcon A) */
++#define EFX_VI_HW_RESOURCE_EVQRPTR 0x6
++/* Offset of register pointer (Falcon B) */
++#define EFX_VI_HW_RESOURCE_EVQRPTR_OFFSET 0x7
++/* Address of mem KVA */
++#define EFX_VI_HW_RESOURCE_EVQMEMKVA 0x8
++/* PFN of doorbell page (Falcon) */
++#define EFX_VI_HW_RESOURCE_BELLPAGE 0x9
++
++/*! How large an array to allocate for the get_() functions - smaller
++ than the total number of constants as some are mutually exclusive */
++#define EFX_VI_HW_RESOURCE_MAXSIZE 0x7
++
++/*! Constants for the mem_type field in efx_vi_hw_resource */
++#define EFX_VI_HW_RESOURCE_IOBUFFER 0 /* Host memory */
++#define EFX_VI_HW_RESOURCE_PERIPHERAL 1 /* Card memory/registers */
++
++/*!
++ * Data structure providing information on a hardware resource mapping
++ */
++struct efx_vi_hw_resource {
++ u8 type; /*!< What this resource represents */
++ u8 mem_type; /*!< What type of memory is it in, eg,
++ * host or iomem */
++ u8 more_to_follow; /*!< Is this part of a multi-region resource */
++ u32 length; /*!< Length of the resource in bytes */
++ unsigned long address; /*!< Address of this resource */
++};
++
++/*!
++ * Metadata concerning the list of hardware resource mappings
++ */
++struct efx_vi_hw_resource_metadata {
++ int version;
++ int evq_order;
++ int evq_offs;
++ int evq_capacity;
++ int instance;
++ unsigned rx_capacity;
++ unsigned tx_capacity;
++ int nic_arch;
++ int nic_revision;
++ char nic_variant;
++};
++
++/*!
++ * Obtain a list of hardware resource mappings, using virtual addresses
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param mdata Pointer to a structure to receive the metadata
++ * \param hw_res_array An array to receive the list of hardware resources
++ * \param length The length of hw_res_array. Updated on success to contain
++ * the number of entries in the supplied array that were used.
++ * \return Zero on success, non-zero on failure
++ */
++extern int
++efx_vi_hw_resource_get_virt(struct efx_vi_state *vih,
++ struct efx_vi_hw_resource_metadata *mdata,
++ struct efx_vi_hw_resource *hw_res_array,
++ int *length);
++
++/*!
++ * Obtain a list of hardware resource mappings, using physical addresses
++ *
++ * \param vih The handle to identify the efx_vi
++ * \param mdata Pointer to a structure to receive the metadata
++ * \param hw_res_array An array to receive the list of hardware resources
++ * \param length The length of hw_res_array. Updated on success to contain
++ * the number of entries in the supplied array that were used.
++ * \return Zero on success, non-zero on failure
++ */
++extern int
++efx_vi_hw_resource_get_phys(struct efx_vi_state *vih,
++ struct efx_vi_hw_resource_metadata *mdata,
++ struct efx_vi_hw_resource *hw_res_array,
++ int *length);
++
++#endif /* __CI_DRIVER_RESOURCE_EFX_VI_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/common.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,102 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides API of the efhw library which may be used both from
++ * the kernel and from the user-space code.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_COMMON_H__
++#define __CI_EFHW_COMMON_H__
++
++#include <ci/efhw/common_sysdep.h>
++
++enum efhw_arch {
++ EFHW_ARCH_FALCON,
++ EFHW_ARCH_SIENA,
++};
++
++typedef uint32_t efhw_buffer_addr_t;
++#define EFHW_BUFFER_ADDR_FMT "[ba:%"PRIx32"]"
++
++/*! Comment? */
++typedef union {
++ uint64_t u64;
++ struct {
++ uint32_t a;
++ uint32_t b;
++ } opaque;
++ struct {
++ uint32_t code;
++ uint32_t status;
++ } ev1002;
++} efhw_event_t;
++
++/* Flags for TX/RX queues */
++#define EFHW_VI_JUMBO_EN 0x01 /*! scatter RX over multiple desc */
++#define EFHW_VI_ISCSI_RX_HDIG_EN 0x02 /*! iscsi rx header digest */
++#define EFHW_VI_ISCSI_TX_HDIG_EN 0x04 /*! iscsi tx header digest */
++#define EFHW_VI_ISCSI_RX_DDIG_EN 0x08 /*! iscsi rx data digest */
++#define EFHW_VI_ISCSI_TX_DDIG_EN 0x10 /*! iscsi tx data digest */
++#define EFHW_VI_TX_PHYS_ADDR_EN 0x20 /*! TX physical address mode */
++#define EFHW_VI_RX_PHYS_ADDR_EN 0x40 /*! RX physical address mode */
++#define EFHW_VI_RM_WITH_INTERRUPT 0x80 /*! VI with an interrupt */
++#define EFHW_VI_TX_IP_CSUM_DIS 0x100 /*! enable ip checksum generation */
++#define EFHW_VI_TX_TCPUDP_CSUM_DIS 0x200 /*! enable tcp/udp checksum
++ generation */
++#define EFHW_VI_TX_TCPUDP_ONLY 0x400 /*! drop non-tcp/udp packets */
++
++/* Types of hardware filter */
++/* Each of these values implicitly selects scatter filters on B0 - or in
++ EFHW_IP_FILTER_TYPE_NOSCAT_B0_MASK if a non-scatter filter is required */
++#define EFHW_IP_FILTER_TYPE_UDP_WILDCARD (0) /* dest host only */
++#define EFHW_IP_FILTER_TYPE_UDP_FULL (1) /* dest host and port */
++#define EFHW_IP_FILTER_TYPE_TCP_WILDCARD (2) /* dest based filter */
++#define EFHW_IP_FILTER_TYPE_TCP_FULL (3) /* src filter */
++/* Same again, but with RSS (for B0 only) */
++#define EFHW_IP_FILTER_TYPE_UDP_WILDCARD_RSS_B0 (4)
++#define EFHW_IP_FILTER_TYPE_UDP_FULL_RSS_B0 (5)
++#define EFHW_IP_FILTER_TYPE_TCP_WILDCARD_RSS_B0 (6)
++#define EFHW_IP_FILTER_TYPE_TCP_FULL_RSS_B0 (7)
++
++#define EFHW_IP_FILTER_TYPE_FULL_MASK (0x1) /* Mask for full / wildcard */
++#define EFHW_IP_FILTER_TYPE_TCP_MASK (0x2) /* Mask for TCP type */
++#define EFHW_IP_FILTER_TYPE_RSS_B0_MASK (0x4) /* Mask for B0 RSS enable */
++#define EFHW_IP_FILTER_TYPE_NOSCAT_B0_MASK (0x8) /* Mask for B0 SCATTER dsbl */
++
++#define EFHW_IP_FILTER_TYPE_MASK (0xffff) /* Mask of types above */
++
++#define EFHW_IP_FILTER_BROADCAST (0x10000) /* driverlink filter
++ support */
++
++#endif /* __CI_EFHW_COMMON_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/common_sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/common_sysdep.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,67 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides version-independent Linux kernel API for
++ * userland-to-kernel interfaces.
++ * Only kernels >=2.6.9 are supported.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_COMMON_LINUX_H__
++#define __CI_EFHW_COMMON_LINUX_H__
++
++#include <linux/types.h>
++#include <linux/version.h>
++
++/* Dirty hack, but Linux kernel does not provide DMA_ADDR_T_FMT */
++#if BITS_PER_LONG == 64 || defined(CONFIG_HIGHMEM64G)
++#define DMA_ADDR_T_FMT "%llx"
++#else
++#define DMA_ADDR_T_FMT "%x"
++#endif
++
++/* Linux kernel also does not provide PRIx32... Sigh. */
++#define PRIx32 "x"
++#define PRIx64 "llx"
++
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
++enum {
++ false = 0,
++ true = 1
++};
++
++typedef _Bool bool;
++#endif /* LINUX_VERSION_CODE < 2.6.19 */
++
++#endif /* __CI_EFHW_COMMON_LINUX_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/debug.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/debug.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,84 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides debug-related API for efhw library using Linux kernel
++ * primitives.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_DEBUG_LINUX_H__
++#define __CI_EFHW_DEBUG_LINUX_H__
++
++#define EFHW_PRINTK_PREFIX "[sfc efhw] "
++
++#define EFHW_PRINTK(level, fmt, ...) \
++ printk(level EFHW_PRINTK_PREFIX fmt "\n", __VA_ARGS__)
++
++/* Following macros should be used with non-zero format parameters
++ * due to __VA_ARGS__ limitations. Use "%s" with __FUNCTION__ if you can't
++ * find better parameters. */
++#define EFHW_ERR(fmt, ...) EFHW_PRINTK(KERN_ERR, fmt, __VA_ARGS__)
++#define EFHW_WARN(fmt, ...) EFHW_PRINTK(KERN_WARNING, fmt, __VA_ARGS__)
++#define EFHW_NOTICE(fmt, ...) EFHW_PRINTK(KERN_NOTICE, fmt, __VA_ARGS__)
++#if 0 && !defined(NDEBUG)
++#define EFHW_TRACE(fmt, ...) EFHW_PRINTK(KERN_DEBUG, fmt, __VA_ARGS__)
++#else
++#define EFHW_TRACE(fmt, ...)
++#endif
++
++#ifndef NDEBUG
++#define EFHW_ASSERT(cond) BUG_ON((cond) == 0)
++#define EFHW_DO_DEBUG(expr) expr
++#else
++#define EFHW_ASSERT(cond)
++#define EFHW_DO_DEBUG(expr)
++#endif
++
++#define EFHW_TEST(expr) \
++ do { \
++ if (unlikely(!(expr))) \
++ BUG(); \
++ } while (0)
++
++/* Build time asserts. We paste the line number into the type name
++ * so that the macro can be used more than once per file even if the
++ * compiler objects to multiple identical typedefs. Collisions
++ * between use in different header files is still possible. */
++#ifndef EFHW_BUILD_ASSERT
++#define __EFHW_BUILD_ASSERT_NAME(_x) __EFHW_BUILD_ASSERT_ILOATHECPP(_x)
++#define __EFHW_BUILD_ASSERT_ILOATHECPP(_x) __EFHW_BUILD_ASSERT__ ##_x
++#define EFHW_BUILD_ASSERT(e) \
++ typedef char __EFHW_BUILD_ASSERT_NAME(__LINE__)[(e) ? 1 : -1]
++#endif
++
++#endif /* __CI_EFHW_DEBUG_LINUX_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/efhw_config.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/efhw_config.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,43 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides some limits used in both kernel and userland code.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_EFAB_CONFIG_H__
++#define __CI_EFHW_EFAB_CONFIG_H__
++
++#define EFHW_MAX_NR_DEVS 5 /* max number of efhw devices supported */
++
++#endif /* __CI_EFHW_EFAB_CONFIG_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/efhw_types.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/efhw_types.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,342 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides struct efhw_nic and some related types.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_EFAB_TYPES_H__
++#define __CI_EFHW_EFAB_TYPES_H__
++
++#include <ci/efhw/efhw_config.h>
++#include <ci/efhw/hardware_sysdep.h>
++#include <ci/efhw/iopage_types.h>
++#include <ci/efhw/sysdep.h>
++
++/*--------------------------------------------------------------------
++ *
++ * hardware limits used in the types
++ *
++ *--------------------------------------------------------------------*/
++
++#define EFHW_KEVENTQ_MAX 8
++
++/*--------------------------------------------------------------------
++ *
++ * forward type declarations
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_nic;
++
++/*--------------------------------------------------------------------
++ *
++ * Managed interface
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_buffer_table_allocation{
++ unsigned base;
++ unsigned order;
++};
++
++struct eventq_resource_hardware {
++ /*!iobuffer allocated for eventq - can be larger than eventq */
++ efhw_iopages_t iobuff;
++ unsigned iobuff_off;
++ struct efhw_buffer_table_allocation buf_tbl_alloc;
++ int capacity; /*!< capacity of event queue */
++};
++
++/*--------------------------------------------------------------------
++ *
++ * event queues and event driven callbacks
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_keventq {
++ volatile int lock;
++ caddr_t evq_base;
++ int32_t evq_ptr;
++ uint32_t evq_mask;
++ unsigned instance;
++ struct eventq_resource_hardware hw;
++ struct efhw_ev_handler *ev_handlers;
++};
++
++/**********************************************************************
++ * Portable HW interface. ***************************************
++ **********************************************************************/
++
++/*--------------------------------------------------------------------
++ *
++ * EtherFabric Functional units - configuration and control
++ *
++ *--------------------------------------------------------------------*/
++
++struct efhw_func_ops {
++
++ /*-------------- Initialisation ------------ */
++
++ /*! close down all hardware functional units - leaves NIC in a safe
++ state for driver unload */
++ void (*close_hardware) (struct efhw_nic *nic);
++
++ /*! initialise all hardware functional units */
++ int (*init_hardware) (struct efhw_nic *nic,
++ struct efhw_ev_handler *,
++ const uint8_t *mac_addr);
++
++ /*-------------- Interrupt support ------------ */
++
++ /*! Main interrupt routine
++ ** This function returns,
++ ** - zero, if the IRQ was not generated by EF1
++ ** - non-zero, if EF1 was the source of the IRQ
++ **
++ **
++ ** opaque is an OS provided pointer for use by the OS callbacks
++ ** e.g in Windows used to indicate DPC scheduled
++ */
++ int (*interrupt) (struct efhw_nic *nic);
++
++ /*! Enable given interrupt mask for the given IRQ unit */
++ void (*interrupt_enable) (struct efhw_nic *nic, uint idx);
++
++ /*! Disable given interrupt mask for the given IRQ unit */
++ void (*interrupt_disable) (struct efhw_nic *nic, uint idx);
++
++ /*! Set interrupt moderation strategy for the given IRQ unit
++ ** val is in usec
++ */
++ void (*set_interrupt_moderation)(struct efhw_nic *nic,
++ uint idx, uint val);
++
++ /*-------------- Event support ------------ */
++
++ /*! Enable the given event queue
++ depending on the underlying implementation (EF1 or Falcon) then
++ either a q_base_addr in host memory, or a buffer base id should
++ be proivded
++ */
++ void (*event_queue_enable) (struct efhw_nic *nic,
++ uint evq, /* evnt queue index */
++ uint evq_size, /* units of #entries */
++ dma_addr_t q_base_addr, uint buf_base_id);
++
++ /*! Disable the given event queue (and any associated timer) */
++ void (*event_queue_disable) (struct efhw_nic *nic, uint evq,
++ int timer_only);
++
++ /*! request wakeup from the NIC on a given event Q */
++ void (*wakeup_request) (struct efhw_nic *nic, dma_addr_t q_base_addr,
++ int next_i, int evq);
++
++ /*! Push a SW event on a given eventQ */
++ void (*sw_event) (struct efhw_nic *nic, int data, int evq);
++
++ /*-------------- Filter support ------------ */
++
++ /*! Setup a given filter - The software can request a filter_i,
++ * but some EtherFabric implementations will override with
++ * a more suitable index
++ */
++ int (*ipfilter_set) (struct efhw_nic *nic, int type,
++ int *filter_i, int dmaq,
++ unsigned saddr_be32, unsigned sport_be16,
++ unsigned daddr_be32, unsigned dport_be16);
++
++ /*! Attach a given filter to a DMAQ */
++ void (*ipfilter_attach) (struct efhw_nic *nic, int filter_idx,
++ int dmaq_idx);
++
++ /*! Detach a filter from its DMAQ */
++ void (*ipfilter_detach) (struct efhw_nic *nic, int filter_idx);
++
++ /*! Clear down a given filter */
++ void (*ipfilter_clear) (struct efhw_nic *nic, int filter_idx);
++
++ /*-------------- DMA support ------------ */
++
++ /*! Initialise NIC state for a given TX DMAQ */
++ void (*dmaq_tx_q_init) (struct efhw_nic *nic,
++ uint dmaq, uint evq, uint owner, uint tag,
++ uint dmaq_size, uint buf_idx, uint flags);
++
++ /*! Initialise NIC state for a given RX DMAQ */
++ void (*dmaq_rx_q_init) (struct efhw_nic *nic,
++ uint dmaq, uint evq, uint owner, uint tag,
++ uint dmaq_size, uint buf_idx, uint flags);
++
++ /*! Disable a given TX DMAQ */
++ void (*dmaq_tx_q_disable) (struct efhw_nic *nic, uint dmaq);
++
++ /*! Disable a given RX DMAQ */
++ void (*dmaq_rx_q_disable) (struct efhw_nic *nic, uint dmaq);
++
++ /*! Flush a given TX DMA channel */
++ int (*flush_tx_dma_channel) (struct efhw_nic *nic, uint dmaq);
++
++ /*! Flush a given RX DMA channel */
++ int (*flush_rx_dma_channel) (struct efhw_nic *nic, uint dmaq);
++
++ /*-------------- Buffer table Support ------------ */
++
++ /*! Initialise a buffer table page */
++ void (*buffer_table_set) (struct efhw_nic *nic,
++ dma_addr_t dma_addr,
++ uint bufsz, uint region,
++ int own_id, int buffer_id);
++
++ /*! Initialise a block of buffer table pages */
++ void (*buffer_table_set_n) (struct efhw_nic *nic, int buffer_id,
++ dma_addr_t dma_addr,
++ uint bufsz, uint region,
++ int n_pages, int own_id);
++
++ /*! Clear a block of buffer table pages */
++ void (*buffer_table_clear) (struct efhw_nic *nic, int buffer_id,
++ int num);
++
++ /*! Commit a buffer table update */
++ void (*buffer_table_commit) (struct efhw_nic *nic);
++
++};
++
++
++/*----------------------------------------------------------------------------
++ *
++ * NIC type
++ *
++ *---------------------------------------------------------------------------*/
++
++struct efhw_device_type {
++ int arch; /* enum efhw_arch */
++ char variant; /* 'A', 'B', ... */
++ int revision; /* 0, 1, ... */
++};
++
++
++/*----------------------------------------------------------------------------
++ *
++ * EtherFabric NIC instance - nic.c for HW independent functions
++ *
++ *---------------------------------------------------------------------------*/
++
++/*! */
++struct efhw_nic {
++ /*! zero base index in efrm_nic_table.nic array */
++ volatile int index;
++ int ifindex; /*!< OS level nic index */
++#ifdef HAS_NET_NAMESPACE
++ struct net *nd_net;
++#endif
++
++ struct efhw_device_type devtype;
++
++ /*! Options that can be set by user. */
++ unsigned options;
++# define NIC_OPT_EFTEST 0x1 /* owner is an eftest app */
++
++# define NIC_OPT_DEFAULT 0
++
++ /*! Internal flags that indicate hardware properties at runtime. */
++ unsigned flags;
++# define NIC_FLAG_NO_INTERRUPT 0x01 /* to be set at init time only */
++# define NIC_FLAG_TRY_MSI 0x02
++# define NIC_FLAG_MSI 0x04
++# define NIC_FLAG_OS_IRQ_EN 0x08
++# define NIC_FLAG_10G 0x10
++
++ unsigned mtu; /*!< MAC MTU (includes MAC hdr) */
++
++ /* hardware resources */
++
++ /*! I/O address of the start of the bar */
++ efhw_ioaddr_t bar_ioaddr;
++
++ /*! Bar number of control aperture. */
++ unsigned ctr_ap_bar;
++ /*! Length of control aperture in bytes. */
++ unsigned ctr_ap_bytes;
++
++ uint8_t mac_addr[ETH_ALEN]; /*!< mac address */
++
++ /*! EtherFabric Functional Units -- functions */
++ const struct efhw_func_ops *efhw_func;
++
++ /* Value read from FPGA version register. Zero for asic. */
++ unsigned fpga_version;
++
++ /*! This lock protects a number of misc NIC resources. It should
++ * only be used for things that can be at the bottom of the lock
++ * order. ie. You mustn't attempt to grab any other lock while
++ * holding this one.
++ */
++ spinlock_t *reg_lock;
++ spinlock_t the_reg_lock;
++
++ int buf_commit_outstanding; /*!< outstanding buffer commits */
++
++ /*! interrupt callbacks (hard-irq) */
++ void (*irq_handler) (struct efhw_nic *, int unit);
++
++ /*! event queues per driver */
++ struct efhw_keventq evq[EFHW_KEVENTQ_MAX];
++
++/* for marking when we are not using an IRQ unit
++ - 0 is a valid offset to an IRQ unit on EF1! */
++#define EFHW_IRQ_UNIT_UNUSED 0xffff
++ /*! interrupt unit in use */
++ unsigned int irq_unit[EFHW_KEVENTQ_MAX];
++ efhw_iopage_t irq_iobuff; /*!< Falcon SYSERR interrupt */
++
++ /* The new driverlink infrastructure. */
++ struct efx_dl_device *net_driver_dev;
++ struct efx_dlfilt_cb_s *dlfilter_cb;
++
++ /*! Bit masks of the sizes of event queues and dma queues supported
++ * by the nic. */
++ unsigned evq_sizes;
++ unsigned rxq_sizes;
++ unsigned txq_sizes;
++
++ /* Size of filter table (including odd and even banks). */
++ unsigned filter_tbl_size;
++};
++
++
++#define EFHW_KVA(nic) ((nic)->bar_ioaddr)
++
++
++#endif /* __CI_EFHW_EFHW_TYPES_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/hardware_sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/hardware_sysdep.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,84 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides version-independent Linux kernel API for header files
++ * with hardware-related definitions (in ci/driver/efab/hardware*).
++ * Only kernels >=2.6.9 are supported.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_HARDWARE_LINUX_H__
++#define __CI_EFHW_HARDWARE_LINUX_H__
++
++#include <asm/io.h>
++
++#ifdef __LITTLE_ENDIAN
++#define EFHW_IS_LITTLE_ENDIAN
++#elif __BIG_ENDIAN
++#define EFHW_IS_BIG_ENDIAN
++#else
++#error Unknown endianness
++#endif
++
++#ifndef mmiowb
++ #if defined(__i386__) || defined(__x86_64__)
++ #define mmiowb()
++ #elif defined(__ia64__)
++ #ifndef ia64_mfa
++ #define ia64_mfa() asm volatile ("mf.a" ::: "memory")
++ #endif
++ #define mmiowb ia64_mfa
++ #else
++ #error "Need definition for mmiowb()"
++ #endif
++#endif
++
++typedef char *efhw_ioaddr_t;
++
++#ifndef readq
++static inline uint64_t __readq(void __iomem *addr)
++{
++ return *(volatile uint64_t *)addr;
++}
++#define readq(x) __readq(x)
++#endif
++
++#ifndef writeq
++static inline void __writeq(uint64_t v, void __iomem *addr)
++{
++ *(volatile uint64_t *)addr = v;
++}
++#define writeq(val, addr) __writeq((val), (addr))
++#endif
++
++#endif /* __CI_EFHW_HARDWARE_LINUX_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/iopage_types.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/iopage_types.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,188 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides efhw_page_t and efhw_iopage_t for Linux kernel.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_IOPAGE_LINUX_H__
++#define __CI_EFHW_IOPAGE_LINUX_H__
++
++#include <linux/gfp.h>
++#include <linux/hardirq.h>
++#include <ci/efhw/debug.h>
++
++/*--------------------------------------------------------------------
++ *
++ * efhw_page_t: A single page of memory. Directly mapped in the driver,
++ * and can be mapped to userlevel.
++ *
++ *--------------------------------------------------------------------*/
++
++typedef struct {
++ unsigned long kva;
++} efhw_page_t;
++
++static inline int efhw_page_alloc(efhw_page_t *p)
++{
++ p->kva = __get_free_page(in_interrupt()? GFP_ATOMIC : GFP_KERNEL);
++ return p->kva ? 0 : -ENOMEM;
++}
++
++static inline int efhw_page_alloc_zeroed(efhw_page_t *p)
++{
++ p->kva = get_zeroed_page(in_interrupt()? GFP_ATOMIC : GFP_KERNEL);
++ return p->kva ? 0 : -ENOMEM;
++}
++
++static inline void efhw_page_free(efhw_page_t *p)
++{
++ free_page(p->kva);
++ EFHW_DO_DEBUG(memset(p, 0, sizeof(*p)));
++}
++
++static inline char *efhw_page_ptr(efhw_page_t *p)
++{
++ return (char *)p->kva;
++}
++
++static inline unsigned efhw_page_pfn(efhw_page_t *p)
++{
++ return (unsigned)(__pa(p->kva) >> PAGE_SHIFT);
++}
++
++static inline void efhw_page_mark_invalid(efhw_page_t *p)
++{
++ p->kva = 0;
++}
++
++static inline int efhw_page_is_valid(efhw_page_t *p)
++{
++ return p->kva != 0;
++}
++
++static inline void efhw_page_init_from_va(efhw_page_t *p, void *va)
++{
++ p->kva = (unsigned long)va;
++}
++
++/*--------------------------------------------------------------------
++ *
++ * efhw_iopage_t: A single page of memory. Directly mapped in the driver,
++ * and can be mapped to userlevel. Can also be accessed by the NIC.
++ *
++ *--------------------------------------------------------------------*/
++
++typedef struct {
++ efhw_page_t p;
++ dma_addr_t dma_addr;
++} efhw_iopage_t;
++
++static inline dma_addr_t efhw_iopage_dma_addr(efhw_iopage_t *p)
++{
++ return p->dma_addr;
++}
++
++#define efhw_iopage_ptr(iop) efhw_page_ptr(&(iop)->p)
++#define efhw_iopage_pfn(iop) efhw_page_pfn(&(iop)->p)
++#define efhw_iopage_mark_invalid(iop) efhw_page_mark_invalid(&(iop)->p)
++#define efhw_iopage_is_valid(iop) efhw_page_is_valid(&(iop)->p)
++
++/*--------------------------------------------------------------------
++ *
++ * efhw_iopages_t: A set of pages that are contiguous in physical memory.
++ * Directly mapped in the driver, and can be mapped to userlevel. Can also
++ * be accessed by the NIC.
++ *
++ * NB. The O/S may be unwilling to allocate many, or even any of these. So
++ * only use this type where the NIC really needs a physically contiguous
++ * buffer.
++ *
++ *--------------------------------------------------------------------*/
++
++typedef struct {
++ caddr_t kva;
++ unsigned order;
++ dma_addr_t dma_addr;
++} efhw_iopages_t;
++
++static inline caddr_t efhw_iopages_ptr(efhw_iopages_t *p)
++{
++ return p->kva;
++}
++
++static inline unsigned efhw_iopages_pfn(efhw_iopages_t *p)
++{
++ return (unsigned)(__pa(p->kva) >> PAGE_SHIFT);
++}
++
++static inline dma_addr_t efhw_iopages_dma_addr(efhw_iopages_t *p)
++{
++ return p->dma_addr;
++}
++
++static inline unsigned efhw_iopages_size(efhw_iopages_t *p)
++{
++ return 1u << (p->order + PAGE_SHIFT);
++}
++
++/* efhw_iopage_t <-> efhw_iopages_t conversions for handling physically
++ * contiguous allocations in iobufsets for iSCSI. This allows the
++ * essential information about contiguous allocations from
++ * efhw_iopages_alloc() to be saved away in the efhw_iopage_t array in an
++ * iobufset. (Changing the iobufset resource to use a union type would
++ * involve a lot of code changes, and make the iobufset's metadata larger
++ * which could be bad as it's supposed to fit into a single page on some
++ * platforms.)
++ */
++static inline void
++efhw_iopage_init_from_iopages(efhw_iopage_t *iopage,
++ efhw_iopages_t *iopages, unsigned pageno)
++{
++ iopage->p.kva = ((unsigned long)efhw_iopages_ptr(iopages))
++ + (pageno * PAGE_SIZE);
++ iopage->dma_addr = efhw_iopages_dma_addr(iopages) +
++ (pageno * PAGE_SIZE);
++}
++
++static inline void
++efhw_iopages_init_from_iopage(efhw_iopages_t *iopages,
++ efhw_iopage_t *iopage, unsigned order)
++{
++ iopages->kva = (caddr_t) efhw_iopage_ptr(iopage);
++ EFHW_ASSERT(iopages->kva);
++ iopages->order = order;
++ iopages->dma_addr = efhw_iopage_dma_addr(iopage);
++}
++
++#endif /* __CI_EFHW_IOPAGE_LINUX_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/public.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/public.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,83 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public API of efhw library exported from the SFC
++ * resource driver.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_PUBLIC_H__
++#define __CI_EFHW_PUBLIC_H__
++
++#include <ci/efhw/common.h>
++#include <ci/efhw/efhw_types.h>
++
++/*! Returns true if we have some EtherFabric functional units -
++ whether configured or not */
++static inline int efhw_nic_have_functional_units(struct efhw_nic *nic)
++{
++ return nic->efhw_func != 0;
++}
++
++/*! Returns true if the EtherFabric functional units have been configured */
++static inline int efhw_nic_have_hw(struct efhw_nic *nic)
++{
++ return efhw_nic_have_functional_units(nic) && (EFHW_KVA(nic) != 0);
++}
++
++/*! Helper function to allocate the iobuffer needed by an eventq
++ * - it ensures the eventq has the correct alignment for the NIC
++ *
++ * \param rm Event-queue resource manager
++ * \param instance Event-queue instance (index)
++ * \param buf_bytes Requested size of eventq
++ * \return < 0 if iobuffer allocation fails
++ */
++int efhw_nic_event_queue_alloc_iobuffer(struct efhw_nic *nic,
++ struct eventq_resource_hardware *h,
++ int evq_instance, unsigned buf_bytes);
++
++extern void falcon_nic_set_rx_usr_buf_size(struct efhw_nic *,
++ int rx_usr_buf_size);
++
++extern void
++falcon_nic_rx_filter_ctl_set(struct efhw_nic *nic, uint32_t tcp_full,
++ uint32_t tcp_wild,
++ uint32_t udp_full, uint32_t udp_wild);
++
++extern void
++falcon_nic_rx_filter_ctl_get(struct efhw_nic *nic, uint32_t *tcp_full,
++ uint32_t *tcp_wild,
++ uint32_t *udp_full, uint32_t *udp_wild);
++
++#endif /* __CI_EFHW_PUBLIC_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efhw/sysdep.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,72 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides version-independent Linux kernel API for efhw library.
++ * Only kernels >=2.6.9 are supported.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFHW_SYSDEP_LINUX_H__
++#define __CI_EFHW_SYSDEP_LINUX_H__
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/spinlock.h>
++#include <linux/delay.h>
++#include <linux/if_ether.h>
++
++#include <linux/netdevice.h> /* necessary for etherdevice.h on some kernels */
++#include <linux/etherdevice.h>
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,21)
++static inline int is_local_ether_addr(const u8 *addr)
++{
++ return (0x02 & addr[0]);
++}
++#endif
++
++typedef unsigned long irq_flags_t;
++
++#define spin_lock_destroy(l_) do {} while (0)
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++#define HAS_NET_NAMESPACE
++#endif
++
++/* Funny, but linux has round_up for x86 only, defined in
++ * x86-specific header */
++#ifndef round_up
++#define round_up(x, y) (((x) + (y) - 1) & ~((y)-1))
++#endif
++
++#endif /* __CI_EFHW_SYSDEP_LINUX_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efrm/nic_table.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efrm/nic_table.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,98 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides public API for NIC table.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_NIC_TABLE_H__
++#define __CI_EFRM_NIC_TABLE_H__
++
++#include <ci/efhw/efhw_types.h>
++#include <ci/efrm/sysdep.h>
++
++/*--------------------------------------------------------------------
++ *
++ * struct efrm_nic_table - top level driver object keeping all NICs -
++ * implemented in driver_object.c
++ *
++ *--------------------------------------------------------------------*/
++
++/*! Comment? */
++struct efrm_nic_table {
++ /*! nics attached to this driver */
++ struct efhw_nic *nic[EFHW_MAX_NR_DEVS];
++ /*! pointer to an arbitrary struct efhw_nic if one exists;
++ * for code which does not care which NIC it wants but
++ * still needs one. Note you cannot assume nic[0] exists. */
++ struct efhw_nic *a_nic;
++ uint32_t nic_count; /*!< number of nics attached to this driver */
++ spinlock_t lock; /*!< lock for table modifications */
++ atomic_t ref_count; /*!< refcount for users of nic table */
++};
++
++/* Resource driver structures used by other drivers as well */
++extern struct efrm_nic_table efrm_nic_table;
++
++static inline void efrm_nic_table_hold(void)
++{
++ atomic_inc(&efrm_nic_table.ref_count);
++}
++
++static inline void efrm_nic_table_rele(void)
++{
++ atomic_dec(&efrm_nic_table.ref_count);
++}
++
++static inline int efrm_nic_table_held(void)
++{
++ return (atomic_read(&efrm_nic_table.ref_count) != 0);
++}
++
++/* Run code block _x multiple times with variable nic set to each
++ * registered NIC in turn.
++ * DO NOT "break" out of this loop early. */
++#define EFRM_FOR_EACH_NIC(_nic_i, _nic) \
++ for ((_nic_i) = (efrm_nic_table_hold(), 0); \
++ (_nic_i) < EFHW_MAX_NR_DEVS || (efrm_nic_table_rele(), 0); \
++ (_nic_i)++) \
++ if (((_nic) = efrm_nic_table.nic[_nic_i]))
++
++#define EFRM_FOR_EACH_NIC_IN_SET(_set, _i, _nic) \
++ for ((_i) = (efrm_nic_table_hold(), 0); \
++ (_i) < EFHW_MAX_NR_DEVS || (efrm_nic_table_rele(), 0); \
++ ++(_i)) \
++ if (((_nic) = efrm_nic_table.nic[_i]) && \
++ efrm_nic_set_read((_set), (_i)))
++
++#endif /* __CI_EFRM_NIC_TABLE_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efrm/sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efrm/sysdep.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,54 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides Linux-like system-independent API for efrm library.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_SYSDEP_H__
++#define __CI_EFRM_SYSDEP_H__
++
++/* Spinlocks are defined in efhw/sysdep.h */
++#include <ci/efhw/sysdep.h>
++
++#if defined(__linux__) && defined(__KERNEL__)
++
++# include <ci/efrm/sysdep_linux.h>
++
++#else
++
++# include <ci/efrm/sysdep_ci2linux.h>
++
++#endif
++
++#endif /* __CI_EFRM_SYSDEP_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/efrm/sysdep_linux.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/efrm/sysdep_linux.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,248 @@
++/****************************************************************************
++ * Driver for Solarflare network controllers -
++ * resource management for Xen backend, OpenOnload, etc
++ * (including support for SFE4001 10GBT NIC)
++ *
++ * This file provides version-independent Linux kernel API for efrm library.
++ * Only kernels >=2.6.9 are supported.
++ *
++ * Copyright 2005-2007: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Kfifo API is partially stolen from linux-2.6.22/include/linux/list.h
++ * Copyright (C) 2004 Stelian Pop <stelian@popies.net>
++ *
++ * Developed and maintained by Solarflare Communications:
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * Certain parts of the driver were implemented by
++ * Alexandra Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
++ * OKTET Labs Ltd, Russia,
++ * http://oktetlabs.ru, <info@oktetlabs.ru>
++ * by request of Solarflare Communications
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef __CI_EFRM_SYSDEP_LINUX_H__
++#define __CI_EFRM_SYSDEP_LINUX_H__
++
++#include <linux/version.h>
++#include <linux/list.h>
++#include <linux/vmalloc.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/workqueue.h>
++#include <linux/gfp.h>
++#include <linux/slab.h>
++#include <linux/hardirq.h>
++#include <linux/kernel.h>
++#include <linux/if_ether.h>
++#include <linux/completion.h>
++#include <linux/in.h>
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++/* get roundup_pow_of_two(), which was in kernel.h in early kernel versions */
++#include <linux/log2.h>
++#endif
++
++/********************************************************************
++ *
++ * List API
++ *
++ ********************************************************************/
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
++static inline void
++list_replace_init(struct list_head *old, struct list_head *new)
++{
++ new->next = old->next;
++ new->next->prev = new;
++ new->prev = old->prev;
++ new->prev->next = new;
++ INIT_LIST_HEAD(old);
++}
++#endif
++
++static inline struct list_head *list_pop(struct list_head *list)
++{
++ struct list_head *link = list->next;
++ list_del(link);
++ return link;
++}
++
++static inline struct list_head *list_pop_tail(struct list_head *list)
++{
++ struct list_head *link = list->prev;
++ list_del(link);
++ return link;
++}
++
++/********************************************************************
++ *
++ * Workqueue API
++ *
++ ********************************************************************/
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
++#define NEED_OLD_WORK_API
++
++/**
++ * The old and new work function prototypes just change
++ * the type of the pointer in the only argument, so it's
++ * safe to cast one function type to the other
++ */
++typedef void (*efrm_old_work_func_t) (void *p);
++
++#undef INIT_WORK
++#define INIT_WORK(_work, _func) \
++ do { \
++ INIT_LIST_HEAD(&(_work)->entry); \
++ (_work)->pending = 0; \
++ PREPARE_WORK((_work), \
++ (efrm_old_work_func_t) (_func), \
++ (_work)); \
++ } while (0)
++
++#endif
++
++/********************************************************************
++ *
++ * Kfifo API
++ *
++ ********************************************************************/
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
++
++#if !defined(RHEL_RELEASE_CODE) || (RHEL_RELEASE_CODE < 1029)
++typedef unsigned gfp_t;
++#endif
++
++#define HAS_NO_KFIFO
++
++struct kfifo {
++ unsigned char *buffer; /* the buffer holding the data */
++ unsigned int size; /* the size of the allocated buffer */
++ unsigned int in; /* data is added at offset (in % size) */
++ unsigned int out; /* data is extracted from off. (out % size) */
++ spinlock_t *lock; /* protects concurrent modifications */
++};
++
++extern struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size,
++ gfp_t gfp_mask, spinlock_t *lock);
++extern struct kfifo *kfifo_alloc(unsigned int size, gfp_t gfp_mask,
++ spinlock_t *lock);
++extern void kfifo_free(struct kfifo *fifo);
++extern unsigned int __kfifo_put(struct kfifo *fifo,
++ unsigned char *buffer, unsigned int len);
++extern unsigned int __kfifo_get(struct kfifo *fifo,
++ unsigned char *buffer, unsigned int len);
++
++/**
++ * kfifo_put - puts some data into the FIFO
++ * @fifo: the fifo to be used.
++ * @buffer: the data to be added.
++ * @len: the length of the data to be added.
++ *
++ * This function copies at most @len bytes from the @buffer into
++ * the FIFO depending on the free space, and returns the number of
++ * bytes copied.
++ */
++static inline unsigned int
++kfifo_put(struct kfifo *fifo, unsigned char *buffer, unsigned int len)
++{
++ unsigned long flags;
++ unsigned int ret;
++
++ spin_lock_irqsave(fifo->lock, flags);
++
++ ret = __kfifo_put(fifo, buffer, len);
++
++ spin_unlock_irqrestore(fifo->lock, flags);
++
++ return ret;
++}
++
++/**
++ * kfifo_get - gets some data from the FIFO
++ * @fifo: the fifo to be used.
++ * @buffer: where the data must be copied.
++ * @len: the size of the destination buffer.
++ *
++ * This function copies at most @len bytes from the FIFO into the
++ * @buffer and returns the number of copied bytes.
++ */
++static inline unsigned int
++kfifo_get(struct kfifo *fifo, unsigned char *buffer, unsigned int len)
++{
++ unsigned long flags;
++ unsigned int ret;
++
++ spin_lock_irqsave(fifo->lock, flags);
++
++ ret = __kfifo_get(fifo, buffer, len);
++
++ /*
++ * optimization: if the FIFO is empty, set the indices to 0
++ * so we don't wrap the next time
++ */
++ if (fifo->in == fifo->out)
++ fifo->in = fifo->out = 0;
++
++ spin_unlock_irqrestore(fifo->lock, flags);
++
++ return ret;
++}
++
++/**
++ * __kfifo_len - returns the number of bytes available in the FIFO, no locking version
++ * @fifo: the fifo to be used.
++ */
++static inline unsigned int __kfifo_len(struct kfifo *fifo)
++{
++ return fifo->in - fifo->out;
++}
++
++/**
++ * kfifo_len - returns the number of bytes available in the FIFO
++ * @fifo: the fifo to be used.
++ */
++static inline unsigned int kfifo_len(struct kfifo *fifo)
++{
++ unsigned long flags;
++ unsigned int ret;
++
++ spin_lock_irqsave(fifo->lock, flags);
++
++ ret = __kfifo_len(fifo);
++
++ spin_unlock_irqrestore(fifo->lock, flags);
++
++ return ret;
++}
++
++#else
++#include <linux/kfifo.h>
++#endif
++
++static inline void kfifo_vfree(struct kfifo *fifo)
++{
++ vfree(fifo->buffer);
++ kfree(fifo);
++}
++
++#endif /* __CI_EFRM_SYSDEP_LINUX_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/tools/config.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/tools/config.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,49 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*! \cidoxg_include_ci_tools */
++
++#ifndef __CI_TOOLS_CONFIG_H__
++#define __CI_TOOLS_CONFIG_H__
++
++
++/**********************************************************************
++ * Debugging.
++ */
++
++#define CI_INCLUDE_ASSERT_VALID 0
++
++/* Set non-zero to allow info about who has allocated what to appear in
++ * /proc/drivers/level5/mem.
++ * However - Note that doing so can lead to segfault when you unload the
++ * driver, and other weirdness. i.e. I don't think the code for is quite
++ * right (written by Oktet, hacked by gel), but it does work well enough to be
++ * useful.
++ */
++#define CI_MEMLEAK_DEBUG_ALLOC_TABLE 0
++
++
++#endif /* __CI_TOOLS_CONFIG_H__ */
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/tools/debug.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/tools/debug.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,336 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*! \cidoxg_include_ci_tools */
++
++#ifndef __CI_TOOLS_DEBUG_H__
++#define __CI_TOOLS_DEBUG_H__
++
++#define CI_LOG_E(x) x /* errors */
++#define CI_LOG_W(x) x /* warnings */
++#define CI_LOG_I(x) x /* information */
++#define CI_LOG_V(x) x /* verbose */
++
++/* Build time asserts. We paste the line number into the type name
++ * so that the macro can be used more than once per file even if the
++ * compiler objects to multiple identical typedefs. Collisions
++ * between use in different header files is still possible. */
++#ifndef CI_BUILD_ASSERT
++#define __CI_BUILD_ASSERT_NAME(_x) __CI_BUILD_ASSERT_ILOATHECPP(_x)
++#define __CI_BUILD_ASSERT_ILOATHECPP(_x) __CI_BUILD_ASSERT__ ##_x
++#define CI_BUILD_ASSERT(e)\
++ typedef char __CI_BUILD_ASSERT_NAME(__LINE__)[(e)?1:-1]
++#endif
++
++
++#ifdef NDEBUG
++
++# define _ci_check(exp, file, line)
++# define _ci_assert2(e, x, y, file, line)
++# define _ci_assert(exp, file, line)
++# define _ci_assert_equal(exp1, exp2, file, line)
++# define _ci_assert_equiv(exp1, exp2, file, line)
++# define _ci_assert_nequal(exp1, exp2, file, line)
++# define _ci_assert_le(exp1, exp2, file, line)
++# define _ci_assert_lt(exp1, exp2, file, line)
++# define _ci_assert_ge(exp1, exp2, file, line)
++# define _ci_assert_gt(exp1, exp2, file, line)
++# define _ci_assert_impl(exp1, exp2, file, line)
++
++# define _ci_verify(exp, file, line) \
++ do { \
++ (void)(exp); \
++ } while (0)
++
++# define CI_DEBUG_TRY(exp) \
++ do { \
++ (void)(exp); \
++ } while (0)
++
++#define CI_TRACE(exp,fmt)
++#define CI_TRACE_INT(integer)
++#define CI_TRACE_INT32(integer)
++#define CI_TRACE_INT64(integer)
++#define CI_TRACE_UINT(integer)
++#define CI_TRACE_UINT32(integer)
++#define CI_TRACE_UINT64(integer)
++#define CI_TRACE_HEX(integer)
++#define CI_TRACE_HEX32(integer)
++#define CI_TRACE_HEX64(integer)
++#define CI_TRACE_PTR(pointer)
++#define CI_TRACE_STRING(string)
++#define CI_TRACE_MAC(mac)
++#define CI_TRACE_IP(ip_be32)
++#define CI_TRACE_ARP(arp_pkt)
++
++#else
++
++# define _CI_ASSERT_FMT "\nfrom %s:%d"
++
++# define _ci_check(exp, file, line) \
++ do { \
++ if (CI_UNLIKELY(!(exp))) \
++ ci_warn(("ci_check(%s)"_CI_ASSERT_FMT, #exp, \
++ (file), (line))); \
++ } while (0)
++
++/*
++ * NOTE: ci_fail() emits the file and line where the assert is actually
++ * coded.
++ */
++
++# define _ci_assert(exp, file, line) \
++ do { \
++ if (CI_UNLIKELY(!(exp))) \
++ ci_fail(("ci_assert(%s)"_CI_ASSERT_FMT, #exp, \
++ (file), (line))); \
++ } while (0)
++
++# define _ci_assert2(e, x, y, file, line) do { \
++ if(CI_UNLIKELY( ! (e) )) \
++ ci_fail(("ci_assert(%s)\nwhere [%s=%"CI_PRIx64"] " \
++ "[%s=%"CI_PRIx64"]\nat %s:%d\nfrom %s:%d", #e \
++ , #x, (ci_uint64)(ci_uintptr_t)(x) \
++ , #y, (ci_uint64)(ci_uintptr_t)(y), \
++ __FILE__, __LINE__, (file), (line))); \
++ } while (0)
++
++# define _ci_verify(exp, file, line) \
++ do { \
++ if (CI_UNLIKELY(!(exp))) \
++ ci_fail(("ci_verify(%s)"_CI_ASSERT_FMT, #exp, \
++ (file), (line))); \
++ } while (0)
++
++# define _ci_assert_equal(x, y, f, l) _ci_assert2((x)==(y), x, y, (f), (l))
++# define _ci_assert_nequal(x, y, f, l) _ci_assert2((x)!=(y), x, y, (f), (l))
++# define _ci_assert_le(x, y, f, l) _ci_assert2((x)<=(y), x, y, (f), (l))
++# define _ci_assert_lt(x, y, f, l) _ci_assert2((x)< (y), x, y, (f), (l))
++# define _ci_assert_ge(x, y, f, l) _ci_assert2((x)>=(y), x, y, (f), (l))
++# define _ci_assert_gt(x, y, f, l) _ci_assert2((x)> (y), x, y, (f), (l))
++# define _ci_assert_or(x, y, f, l) _ci_assert2((x)||(y), x, y, (f), (l))
++# define _ci_assert_impl(x, y, f, l) _ci_assert2(!(x) || (y), x, y, (f), (l))
++# define _ci_assert_equiv(x, y, f, l) _ci_assert2(!(x)== !(y), x, y, (f), (l))
++
++#define _ci_assert_equal_msg(exp1, exp2, msg, file, line) \
++ do { \
++ if (CI_UNLIKELY((exp1)!=(exp2))) \
++ ci_fail(("ci_assert_equal_msg(%s == %s) were " \
++ "(%"CI_PRIx64":%"CI_PRIx64") with msg[%c%c%c%c]" \
++ _CI_ASSERT_FMT, #exp1, #exp2, \
++ (ci_uint64)(ci_uintptr_t)(exp1), \
++ (ci_uint64)(ci_uintptr_t)(exp2), \
++ (((ci_uint32)msg) >> 24) && 0xff, \
++ (((ci_uint32)msg) >> 16) && 0xff, \
++ (((ci_uint32)msg) >> 8 ) && 0xff, \
++ (((ci_uint32)msg) ) && 0xff, \
++ (file), (line))); \
++ } while (0)
++
++# define CI_DEBUG_TRY(exp) CI_TRY(exp)
++
++#define CI_TRACE(exp,fmt) \
++ ci_log("%s:%d:%s] " #exp "=" fmt, \
++ __FILE__, __LINE__, __FUNCTION__, (exp))
++
++
++#define CI_TRACE_INT(integer) \
++ ci_log("%s:%d:%s] " #integer "=%d", \
++ __FILE__, __LINE__, __FUNCTION__, (integer))
++
++
++#define CI_TRACE_INT32(integer) \
++ ci_log("%s:%d:%s] " #integer "=%d", \
++ __FILE__, __LINE__, __FUNCTION__, ((ci_int32)integer))
++
++
++#define CI_TRACE_INT64(integer) \
++ ci_log("%s:%d:%s] " #integer "=%lld", \
++ __FILE__, __LINE__, __FUNCTION__, ((ci_int64)integer))
++
++
++#define CI_TRACE_UINT(integer) \
++ ci_log("%s:%d:%s] " #integer "=%ud", \
++ __FILE__, __LINE__, __FUNCTION__, (integer))
++
++
++#define CI_TRACE_UINT32(integer) \
++ ci_log("%s:%d:%s] " #integer "=%ud", \
++ __FILE__, __LINE__, __FUNCTION__, ((ci_uint32)integer))
++
++
++#define CI_TRACE_UINT64(integer) \
++ ci_log("%s:%d:%s] " #integer "=%ulld", \
++ __FILE__, __LINE__, __FUNCTION__, ((ci_uint64)integer))
++
++
++#define CI_TRACE_HEX(integer) \
++ ci_log("%s:%d:%s] " #integer "=0x%x", \
++ __FILE__, __LINE__, __FUNCTION__, (integer))
++
++
++#define CI_TRACE_HEX32(integer) \
++ ci_log("%s:%d:%s] " #integer "=0x%x", \
++ __FILE__, __LINE__, __FUNCTION__, ((ci_uint32)integer))
++
++
++#define CI_TRACE_HEX64(integer) \
++ ci_log("%s:%d:%s] " #integer "=0x%llx", \
++ __FILE__, __LINE__, __FUNCTION__, ((ci_uint64)integer))
++
++
++#define CI_TRACE_PTR(pointer) \
++ ci_log("%s:%d:%s] " #pointer "=0x%p", \
++ __FILE__, __LINE__, __FUNCTION__, (pointer))
++
++
++#define CI_TRACE_STRING(string) \
++ ci_log("%s:%d:%s] " #string "=%s", \
++ __FILE__, __LINE__, __FUNCTION__, (string))
++
++
++#define CI_TRACE_MAC(mac) \
++ ci_log("%s:%d:%s] " #mac "=" CI_MAC_PRINTF_FORMAT, \
++ __FILE__, __LINE__, __FUNCTION__, CI_MAC_PRINTF_ARGS(mac))
++
++
++#define CI_TRACE_IP(ip_be32) \
++ ci_log("%s:%d:%s] " #ip_be32 "=" CI_IP_PRINTF_FORMAT, __FILE__, \
++ __LINE__, __FUNCTION__, CI_IP_PRINTF_ARGS(&(ip_be32)))
++
++
++#define CI_TRACE_ARP(arp_pkt) \
++ ci_log("%s:%d:%s]\n"CI_ARP_PRINTF_FORMAT, \
++ __FILE__, __LINE__, __FUNCTION__, CI_ARP_PRINTF_ARGS(arp_pkt))
++
++#endif /* NDEBUG */
++
++#define ci_check(exp) \
++ _ci_check(exp, __FILE__, __LINE__)
++
++#define ci_assert(exp) \
++ _ci_assert(exp, __FILE__, __LINE__)
++
++#define ci_verify(exp) \
++ _ci_verify(exp, __FILE__, __LINE__)
++
++#define ci_assert_equal(exp1, exp2) \
++ _ci_assert_equal(exp1, exp2, __FILE__, __LINE__)
++
++#define ci_assert_equal_msg(exp1, exp2, msg) \
++ _ci_assert_equal_msg(exp1, exp2, msg, __FILE__, __LINE__)
++
++#define ci_assert_nequal(exp1, exp2) \
++ _ci_assert_nequal(exp1, exp2, __FILE__, __LINE__)
++
++#define ci_assert_le(exp1, exp2) \
++ _ci_assert_le(exp1, exp2, __FILE__, __LINE__)
++
++#define ci_assert_lt(exp1, exp2) \
++ _ci_assert_lt(exp1, exp2, __FILE__, __LINE__)
++
++#define ci_assert_ge(exp1, exp2) \
++ _ci_assert_ge(exp1, exp2, __FILE__, __LINE__)
++
++#define ci_assert_gt(exp1, exp2) \
++ _ci_assert_gt(exp1, exp2, __FILE__, __LINE__)
++
++#define ci_assert_impl(exp1, exp2) \
++ _ci_assert_impl(exp1, exp2, __FILE__, __LINE__)
++
++#define ci_assert_equiv(exp1, exp2) \
++ _ci_assert_equiv(exp1, exp2, __FILE__, __LINE__)
++
++
++#define CI_TEST(exp) \
++ do{ \
++ if( CI_UNLIKELY(!(exp)) ) \
++ ci_fail(("CI_TEST(%s)", #exp)); \
++ }while(0)
++
++
++#define CI_TRY(exp) \
++ do{ \
++ int _trc; \
++ _trc=(exp); \
++ if( CI_UNLIKELY(_trc < 0) ) \
++ ci_sys_fail(#exp, _trc); \
++ }while(0)
++
++
++#define CI_TRY_RET(exp) \
++ do{ \
++ int _trc; \
++ _trc=(exp); \
++ if( CI_UNLIKELY(_trc < 0) ) { \
++ ci_log("%s returned %d at %s:%d", #exp, _trc, __FILE__, __LINE__); \
++ return _trc; \
++ } \
++ }while(0)
++
++#define CI_LOGLEVEL_TRY_RET(logfn, exp) \
++ do{ \
++ int _trc; \
++ _trc=(exp); \
++ if( CI_UNLIKELY(_trc < 0) ) { \
++ logfn (ci_log("%s returned %d at %s:%d", #exp, _trc, __FILE__, __LINE__)); \
++ return _trc; \
++ } \
++ }while(0)
++
++
++#define CI_SOCK_TRY(exp) \
++ do{ \
++ ci_sock_err_t _trc; \
++ _trc=(exp); \
++ if( CI_UNLIKELY(!ci_sock_errok(_trc)) ) \
++ ci_sys_fail(#exp, _trc.val); \
++ }while(0)
++
++
++#define CI_SOCK_TRY_RET(exp) \
++ do{ \
++ ci_sock_err_t _trc; \
++ _trc=(exp); \
++ if( CI_UNLIKELY(!ci_sock_errok(_trc)) ) { \
++ ci_log("%s returned %d at %s:%d", #exp, _trc.val, __FILE__, __LINE__); \
++ return ci_sock_errcode(_trc); \
++ } \
++ }while(0)
++
++
++#define CI_SOCK_TRY_SOCK_RET(exp) \
++ do{ \
++ ci_sock_err_t _trc; \
++ _trc=(exp); \
++ if( CI_UNLIKELY(!ci_sock_errok(_trc)) ) { \
++ ci_log("%s returned %d at %s:%d", #exp, _trc.val, __FILE__, __LINE__); \
++ return _trc; \
++ } \
++ }while(0)
++
++#endif /* __CI_TOOLS_DEBUG_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/tools/log.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/tools/log.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,262 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr
++ * \brief Functions for logging and pretty-printing.
++ * \date 2002/08/07
++ */
++
++/*! \cidoxg_include_ci_tools */
++
++#ifndef __CI_TOOLS_LOG_H__
++#define __CI_TOOLS_LOG_H__
++
++#include <stdarg.h>
++
++
++/**********************************************************************
++ * Logging.
++ */
++
++/* size of internal log buffer */
++#define CI_LOG_MAX_LINE 512
++/* uses of ci_log must ensure that all trace messages are shorter than this */
++#define CI_LOG_MAX_MSG_LENGTH (CI_LOG_MAX_LINE-50)
++
++extern void ci_vlog(const char* fmt, va_list args) CI_HF;
++extern void ci_log(const char* fmt, ...) CI_PRINTF_LIKE(1,2) CI_HF;
++
++ /*! Set the prefix for log messages.
++ **
++ ** Uses the storage pointed to by \em prefix. Therefore \em prefix must
++ ** be allocated on the heap, or statically.
++ */
++extern void ci_set_log_prefix(const char* prefix) CI_HF;
++
++typedef void (*ci_log_fn_t)(const char* msg);
++extern ci_log_fn_t ci_log_fn CI_HV;
++
++/* Log functions. */
++extern void ci_log_null(const char* msg) CI_HF;
++extern void ci_log_stderr(const char* msg) CI_HF;
++extern void ci_log_stdout(const char* msg) CI_HF;
++extern void ci_log_syslog(const char* msg) CI_HF;
++
++/*! Call the following to install special logging behaviours. */
++extern void ci_log_buffer_till_fail(void) CI_HF;
++extern void ci_log_buffer_till_exit(void) CI_HF;
++
++extern void __ci_log_unique(const char* msg) CI_HF;
++extern ci_log_fn_t __ci_log_unique_fn CI_HV;
++ci_inline void ci_log_uniquify(void) {
++ if( ci_log_fn != __ci_log_unique ) {
++ __ci_log_unique_fn = ci_log_fn;
++ ci_log_fn = __ci_log_unique;
++ }
++}
++
++extern void ci_log_file(const char* msg) CI_HF;
++extern int ci_log_file_fd CI_HV;
++
++extern void __ci_log_nth(const char* msg) CI_HF;
++extern ci_log_fn_t __ci_log_nth_fn CI_HV;
++extern int ci_log_nth_n CI_HV; /* default 100 */
++ci_inline void ci_log_nth(void) {
++ if( ci_log_fn != __ci_log_nth ) {
++ __ci_log_nth_fn = ci_log_fn;
++ ci_log_fn = __ci_log_nth;
++ }
++}
++
++extern int ci_log_level CI_HV;
++
++extern int ci_log_options CI_HV;
++#define CI_LOG_PID 0x1
++#define CI_LOG_TID 0x2
++#define CI_LOG_TIME 0x4
++#define CI_LOG_DELTA 0x8
++
++/**********************************************************************
++ * Used to define which mode we are in
++ */
++#if (defined(_WIN32) && !defined(__KERNEL__))
++typedef enum {
++ ci_log_md_NULL=0,
++ ci_log_md_ioctl,
++ ci_log_md_stderr,
++ ci_log_md_stdout,
++ ci_log_md_file,
++ ci_log_md_serial,
++ ci_log_md_syslog,
++ ci_log_md_pidfile
++} ci_log_mode_t;
++extern ci_log_mode_t ci_log_mode;
++#endif
++
++/**********************************************************************
++ * Pretty-printing.
++ */
++
++extern char ci_printable_char(char c) CI_HF;
++
++extern void (*ci_hex_dump_formatter)(char* buf, const ci_octet* s,
++ int i, int off, int len) CI_HV;
++extern void ci_hex_dump_format_octets(char*,const ci_octet*,int,int,int) CI_HF;
++extern void ci_hex_dump_format_dwords(char*,const ci_octet*,int,int,int) CI_HF;
++
++extern void ci_hex_dump_row(char* buf, volatile const void* s, int len,
++ ci_ptr_arith_t address) CI_HF;
++ /*!< A row contains up to 16 bytes. Row starts at [address & 15u], so
++ ** therefore [len + (address & 15u)] must be <= 16.
++ */
++
++extern void ci_hex_dump(ci_log_fn_t, volatile const void*,
++ int len, ci_ptr_arith_t address) CI_HF;
++
++extern int ci_hex_dump_to_raw(const char* src_hex, void* buf,
++ unsigned* addr_out_opt, int* skip) CI_HF;
++ /*!< Recovers raw data from a single line of a hex dump. [buf] must be at
++ ** least 16 bytes long. Returns the number of bytes written to [buf] (in
++ ** range 1 -> 16), or -1 if [src_hex] doesn't contain hex data. Does not
++ ** cope with missing bytes at the start of a line.
++ */
++
++extern int ci_format_eth_addr(char* buf, const void* eth_mac_addr,
++ char sep) CI_HF;
++ /*!< This will write 18 characters to <buf> including terminating null.
++ ** Returns number of bytes written excluding null. If [sep] is zero, ':'
++ ** is used.
++ */
++
++extern int ci_parse_eth_addr(void* eth_mac_addr,
++ const char* str, char sep) CI_HF;
++ /*!< If [sep] is zero, absolutely any separator is accepted (even
++ ** inconsistent separators). Returns 0 on success, -1 on error.
++ */
++
++extern int ci_format_ip4_addr(char* buf, unsigned addr_be32) CI_HF;
++ /*!< Formats the IP address (in network endian) in dotted-quad. Returns
++ ** the number of bytes written (up to 15), excluding the null. [buf]
++ ** must be at least 16 bytes long.
++ */
++
++
++/**********************************************************************
++ * Error checking.
++ */
++
++extern void (*ci_fail_stop_fn)(void) CI_HV;
++
++extern void ci_fail_stop(void) CI_HF;
++extern void ci_fail_hang(void) CI_HF;
++extern void ci_fail_bomb(void) CI_HF;
++extern void ci_backtrace(void) CI_HF;
++
++#if defined __linux__ && !defined __KERNEL__
++extern void ci_fail_abort (void) CI_HF;
++#endif
++
++#ifdef __GNUC__
++extern void
++__ci_fail(const char*, ...) CI_PRINTF_LIKE(1,2) CI_HF;
++#else
++# if _PREFAST_
++ extern void _declspec(noreturn) __ci_fail(const char* fmt, ...);
++# else
++ extern void __ci_fail(const char* fmt, ...);
++# endif
++
++#endif
++
++#define ci_warn(x) \
++ do{ ci_log("WARN at %s:%d", __FILE__, __LINE__); }while(0)
++
++#define ci_fail(x) \
++ do{ ci_log("FAIL at %s:%d", __FILE__, __LINE__); __ci_fail x; }while(0)
++
++extern void __ci_sys_fail(const char* fn, int rc,
++ const char* file, int line) CI_HF;
++#define ci_sys_fail(fn, rc) __ci_sys_fail(fn, rc, __FILE__, __LINE__)
++
++/**********************************************************************
++ * Logging to buffer (src/citools/log_buffer.c)
++ */
++
++/*! Divert ci_log() messages to the log buffer
++ * normally they go to the system console */
++extern void ci_log_buffer_till_fail(void) CI_HF;
++
++/*! Dump the contents of the log buffer to the system console */
++extern void ci_log_buffer_dump(void) CI_HF;
++
++
++/**********************************************************************
++ * Some useful pretty-printing.
++ */
++
++#ifdef __linux__
++# define CI_SOCKCALL_FLAGS_FMT "%s%s%s%s%s%s%s%s%s%s%s"
++
++# define CI_SOCKCALL_FLAGS_PRI_ARG(x) \
++ (((x) & MSG_OOB ) ? "OOB " :""), \
++ (((x) & MSG_PEEK ) ? "PEEK " :""), \
++ (((x) & MSG_DONTROUTE ) ? "DONTROUTE " :""), \
++ (((x) & MSG_EOR ) ? "EOR " :""), \
++ (((x) & MSG_CTRUNC ) ? "CTRUNC " :""), \
++ (((x) & MSG_TRUNC ) ? "TRUNC " :""), \
++ (((x) & MSG_WAITALL ) ? "WAITALL " :""), \
++ (((x) & MSG_DONTWAIT ) ? "DONTWAIT " :""), \
++ (((x) & MSG_NOSIGNAL ) ? "NOSIGNAL " :""), \
++ (((x) & MSG_ERRQUEUE ) ? "ERRQUEUE " :""), \
++ (((x) & MSG_CONFIRM ) ? "CONFIRM " :"")
++#endif
++
++#ifdef _WIN32
++# define CI_SOCKCALL_FLAGS_FMT "%s%s%s"
++
++# define CI_SOCKCALL_FLAGS_PRI_ARG(x) \
++ (((x) & MSG_OOB ) ? "OOB " :""), \
++ (((x) & MSG_PEEK ) ? "PEEK " :""), \
++ (((x) & MSG_DONTROUTE ) ? "DONTROUTE " :"")
++#endif
++
++#ifdef __sun__
++# define CI_SOCKCALL_FLAGS_FMT "%s%s%s%s%s%s%s%s%s"
++
++# define CI_SOCKCALL_FLAGS_PRI_ARG(x) \
++ (((x) & MSG_OOB ) ? "OOB " :""), \
++ (((x) & MSG_PEEK ) ? "PEEK " :""), \
++ (((x) & MSG_DONTROUTE ) ? "DONTROUTE " :""), \
++ (((x) & MSG_EOR ) ? "EOR " :""), \
++ (((x) & MSG_CTRUNC ) ? "CTRUNC " :""), \
++ (((x) & MSG_TRUNC ) ? "TRUNC " :""), \
++ (((x) & MSG_WAITALL ) ? "WAITALL " :""), \
++ (((x) & MSG_DONTWAIT ) ? "DONTWAIT " :""), \
++ (((x) & MSG_NOTIFICATION) ? "NOTIFICATION" :"")
++#endif
++
++#endif /* __CI_TOOLS_LOG_H__ */
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/tools/platform/gcc_x86.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/tools/platform/gcc_x86.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,361 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*! \cidoxg_include_ci_tools_platform */
++
++#ifndef __CI_TOOLS_GCC_X86_H__
++#define __CI_TOOLS_GCC_X86_H__
++
++
++/**********************************************************************
++ * Free-running cycle counters.
++ */
++
++#define CI_HAVE_FRC64
++#define CI_HAVE_FRC32
++
++#define ci_frc32(pval) __asm__ __volatile__("rdtsc" : "=a" (*pval) : : "edx")
++
++#if defined(__x86_64__)
++ci_inline void ci_frc64(ci_uint64* pval) {
++ /* temp fix until we figure how to get this out in one bite */
++ ci_uint64 low, high;
++ __asm__ __volatile__("rdtsc" : "=a" (low) , "=d" (high));
++ *pval = (high << 32) | low;
++}
++
++#else
++#define ci_frc64(pval) __asm__ __volatile__("rdtsc" : "=A" (*pval))
++#endif
++
++#define ci_frc_flush() /* ?? Need a pipeline barrier. */
++
++
++/**********************************************************************
++ * Atomic integer.
++ */
++
++/*
++** int ci_atomic_read(a) { return a->n; }
++** void ci_atomic_set(a, v) { a->n = v; }
++** void ci_atomic_inc(a) { ++a->n; }
++** void ci_atomic_dec(a) { --a->n; }
++** int ci_atomic_inc_and_test(a) { return ++a->n == 0; }
++** int ci_atomic_dec_and_test(a) { return --a->n == 0; }
++** void ci_atomic_and(a, v) { a->n &= v; }
++** void ci_atomic_or(a, v) { a->n |= v; }
++*/
++
++typedef struct { volatile ci_int32 n; } ci_atomic_t;
++
++#define CI_ATOMIC_INITIALISER(i) {(i)}
++
++static inline ci_int32 ci_atomic_read(const ci_atomic_t* a) { return a->n; }
++static inline void ci_atomic_set(ci_atomic_t* a, int v) { a->n = v; ci_wmb(); }
++
++static inline void ci_atomic_inc(ci_atomic_t* a)
++{ __asm__ __volatile__("lock; incl %0" : "+m" (a->n)); }
++
++
++static inline void ci_atomic_dec(ci_atomic_t* a)
++{ __asm__ __volatile__("lock; decl %0" : "+m" (a->n)); }
++
++static inline int ci_atomic_inc_and_test(ci_atomic_t* a) {
++ char r;
++ __asm__ __volatile__("lock; incl %0; sete %1"
++ : "+m" (a->n), "=qm" (r));
++ return r;
++}
++
++static inline int ci_atomic_dec_and_test(ci_atomic_t* a) {
++ char r;
++ __asm__ __volatile__("lock; decl %0; sete %1"
++ : "+m" (a->n), "=qm" (r));
++ return r;
++}
++
++ci_inline int
++ci_atomic_xadd (ci_atomic_t *a, int v) {
++ __asm__ ("lock xadd %0, %1" : "=r" (v), "+m" (a->n) : "0" (v));
++ return v;
++}
++ci_inline int
++ci_atomic_xchg (ci_atomic_t *a, int v) {
++ __asm__ ("lock xchg %0, %1" : "=r" (v), "+m" (a->n) : "0" (v));
++ return v;
++}
++
++ci_inline void ci_atomic32_or(volatile ci_uint32* p, ci_uint32 mask)
++{ __asm__ __volatile__("lock; orl %1, %0" : "+m" (*p) : "ir" (mask)); }
++
++ci_inline void ci_atomic32_and(volatile ci_uint32* p, ci_uint32 mask)
++{ __asm__ __volatile__("lock; andl %1, %0" : "+m" (*p) : "ir" (mask)); }
++
++ci_inline void ci_atomic32_add(volatile ci_uint32* p, ci_uint32 v)
++{ __asm__ __volatile__("lock; addl %1, %0" : "+m" (*p) : "ir" (v)); }
++
++#define ci_atomic_or(a, v) ci_atomic32_or ((ci_uint32*) &(a)->n, (v))
++#define ci_atomic_and(a, v) ci_atomic32_and((ci_uint32*) &(a)->n, (v))
++#define ci_atomic_add(a, v) ci_atomic32_add((ci_uint32*) &(a)->n, (v))
++
++extern int ci_glibc_uses_nptl (void) CI_HF;
++extern int ci_glibc_nptl_broken(void) CI_HF;
++extern int ci_glibc_gs_get_is_multihreaded_offset (void) CI_HF;
++extern int ci_glibc_gs_is_multihreaded_offset CI_HV;
++
++#if !defined(__x86_64__)
++#ifdef __GLIBC__
++/* Returns non-zero if the calling process might be mulithreaded, returns 0 if
++ * it definitely isn't (i.e. if reimplementing this function for other
++ * architectures and platforms, you can safely just return 1).
++ */
++static inline int ci_is_multithreaded (void) {
++
++ while (1) {
++ if (ci_glibc_gs_is_multihreaded_offset >= 0) {
++ /* NPTL keeps a variable that tells us this hanging off gs (i.e. in thread-
++ * local storage); just return this
++ */
++ int r;
++ __asm__ __volatile__ ("movl %%gs:(%1), %0"
++ : "=r" (r)
++ : "r" (ci_glibc_gs_is_multihreaded_offset));
++ return r;
++ }
++
++ if (ci_glibc_gs_is_multihreaded_offset == -2) {
++ /* This means we've already determined that the libc version is NOT good
++ * for our funky "is multithreaded" hack
++ */
++ return 1;
++ }
++
++ /* If we get here, it means this is the first time the function has been
++ * called -- detect the libc version and go around again.
++ */
++ ci_glibc_gs_is_multihreaded_offset = ci_glibc_gs_get_is_multihreaded_offset ();
++
++ /* Go around again. We do the test here rather than at the top so that we go
++ * quicker in the common the case
++ */
++ }
++}
++
++#else /* def __GLIBC__ */
++
++#define ci_is_multithreaded() 1 /* ?? Is the the POSIX way of finding out */
++ /* whether the appication is single */
++ /* threaded? */
++
++#endif /* def __GLIBC__ */
++
++#else /* defined __x86_64__ */
++
++static inline int ci_is_multithreaded (void) {
++ /* Now easy way to tell on x86_64; so assume we're multithreaded */
++ return 1;
++}
++
++#endif /* defined __x86_64__ */
++
++
++/**********************************************************************
++ * Compare and swap.
++ */
++
++#define CI_HAVE_COMPARE_AND_SWAP
++
++ci_inline int ci_cas32_succeed(volatile ci_int32* p, ci_int32 oldval,
++ ci_int32 newval) {
++ char ret;
++ ci_int32 prevval;
++ __asm__ __volatile__("lock; cmpxchgl %3, %1; sete %0"
++ : "=q"(ret), "+m"(*p), "=a"(prevval)
++ : "r"(newval), "a"(oldval));
++ return ret;
++}
++
++ci_inline int ci_cas32_fail(volatile ci_int32* p, ci_int32 oldval,
++ ci_int32 newval) {
++ char ret;
++ ci_int32 prevval;
++ __asm__ __volatile__("lock; cmpxchgl %3, %1; setne %0"
++ : "=q"(ret), "+m"(*p), "=a"(prevval)
++ : "r"(newval), "a"(oldval));
++ return ret;
++}
++
++#ifdef __x86_64__
++ci_inline int ci_cas64_succeed(volatile ci_int64* p, ci_int64 oldval,
++ ci_int64 newval) {
++ char ret;
++ ci_int64 prevval;
++ __asm__ __volatile__("lock; cmpxchgq %3, %1; sete %0"
++ : "=q"(ret), "+m"(*p), "=a"(prevval)
++ : "r"(newval), "a"(oldval));
++ return ret;
++}
++
++ci_inline int ci_cas64_fail(volatile ci_int64* p, ci_int64 oldval,
++ ci_int64 newval) {
++ char ret;
++ ci_int64 prevval;
++ __asm__ __volatile__("lock; cmpxchgq %3, %1; setne %0"
++ : "=q"(ret), "+m"(*p), "=a"(prevval)
++ : "r"(newval), "a"(oldval));
++ return ret;
++}
++#endif
++
++ci_inline int ci_cas32u_succeed(volatile ci_uint32* p, ci_uint32 oldval, ci_uint32 newval) {
++ char ret;
++ ci_uint32 prevval;
++ __asm__ __volatile__("lock; cmpxchgl %3, %1; sete %0"
++ : "=q"(ret), "+m"(*p), "=a"(prevval)
++ : "r"(newval), "a"(oldval));
++ return ret;
++}
++
++ci_inline int ci_cas32u_fail(volatile ci_uint32* p, ci_uint32 oldval, ci_uint32 newval) {
++ char ret;
++ ci_uint32 prevval;
++ __asm__ __volatile__("lock; cmpxchgl %3, %1; setne %0"
++ : "=q"(ret), "+m"(*p), "=a"(prevval)
++ : "r"(newval), "a"(oldval));
++ return ret;
++}
++
++ci_inline int ci_cas64u_succeed(volatile ci_uint64* p, ci_uint64 oldval,
++ ci_uint64 newval) {
++ char ret;
++ ci_uint64 prevval;
++ __asm__ __volatile__("lock; cmpxchgq %3, %1; sete %0"
++ : "=q"(ret), "+m"(*p), "=a"(prevval)
++ : "r"(newval), "a"(oldval));
++ return ret;
++}
++
++ci_inline int ci_cas64u_fail(volatile ci_uint64* p, ci_uint64 oldval,
++ ci_uint64 newval) {
++ char ret;
++ ci_uint64 prevval;
++ __asm__ __volatile__("lock; cmpxchgq %3, %1; setne %0"
++ : "=q"(ret), "+m"(*p), "=a"(prevval)
++ : "r"(newval), "a"(oldval));
++ return ret;
++}
++
++#ifdef __x86_64__
++
++# define ci_cas_uintptr_succeed(p,o,n) \
++ ci_cas64u_succeed((volatile ci_uint64*) (p), (o), (n))
++# define ci_cas_uintptr_fail(p,o,n) \
++ ci_cas64u_fail((volatile ci_uint64*) (p), (o), (n))
++
++#else
++
++# define ci_cas_uintptr_succeed(p,o,n) \
++ ci_cas32u_succeed((volatile ci_uint32*) (p), (o), (n))
++# define ci_cas_uintptr_fail(p,o,n) \
++ ci_cas32u_fail((volatile ci_uint32*) (p), (o), (n))
++
++#endif
++
++
++/**********************************************************************
++ * Atomic bit field.
++ */
++
++typedef ci_uint32 ci_bits;
++#define CI_BITS_N 32u
++
++#define CI_BITS_DECLARE(name, n) \
++ ci_bits name[((n) + CI_BITS_N - 1u) / CI_BITS_N]
++
++ci_inline void ci_bits_clear_all(volatile ci_bits* b, int n_bits)
++{ memset((void*) b, 0, (n_bits+CI_BITS_N-1u) / CI_BITS_N * sizeof(ci_bits)); }
++
++ci_inline void ci_bit_set(volatile ci_bits* b, int i) {
++ __asm__ __volatile__("lock; btsl %1, %0"
++ : "=m" (*b)
++ : "Ir" (i));
++}
++
++ci_inline void ci_bit_clear(volatile ci_bits* b, int i) {
++ __asm__ __volatile__("lock; btrl %1, %0"
++ : "=m" (*b)
++ : "Ir" (i));
++}
++
++ci_inline int ci_bit_test(volatile ci_bits* b, int i) {
++ char rc;
++ __asm__("btl %2, %1; setc %0"
++ : "=r" (rc)
++ : "m" (*b), "Ir" (i));
++ return rc;
++}
++
++ci_inline int ci_bit_test_and_set(volatile ci_bits* b, int i) {
++ char rc;
++ __asm__ __volatile__("lock; btsl %2, %1; setc %0"
++ : "=r" (rc), "+m" (*b)
++ : "Ir" (i));
++ return rc;
++}
++
++ci_inline int ci_bit_test_and_clear(volatile ci_bits* b, int i) {
++ char rc;
++ __asm__ __volatile__("lock; btrl %2, %1; setc %0"
++ : "=r" (rc), "+m" (*b)
++ : "Ir" (i));
++ return rc;
++}
++
++/* These mask ops only work within a single ci_bits word. */
++#define ci_bit_mask_set(b,m) ci_atomic32_or((b), (m))
++#define ci_bit_mask_clear(b,m) ci_atomic32_and((b), ~(m))
++
++
++/**********************************************************************
++ * Misc.
++ */
++
++#if __GNUC__ >= 3
++# define ci_spinloop_pause() __asm__("pause")
++#else
++# define ci_spinloop_pause() __asm__(".byte 0xf3, 0x90")
++#endif
++
++
++#define CI_HAVE_ADDC32
++#define ci_add_carry32(sum, v) __asm__("addl %1, %0 ;" \
++ "adcl $0, %0 ;" \
++ : "=r" (sum) \
++ : "g" ((ci_uint32) v), "0" (sum))
++
++
++#endif /* __CI_TOOLS_GCC_X86_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/tools/platform/linux_kernel.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/tools/platform/linux_kernel.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,362 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++
++/*! \cidoxg_include_ci_tools_platform */
++
++#ifndef __CI_TOOLS_LINUX_KERNEL_H__
++#define __CI_TOOLS_LINUX_KERNEL_H__
++
++/**********************************************************************
++ * Need to know the kernel version.
++ */
++
++#ifndef LINUX_VERSION_CODE
++# include <linux/version.h>
++# ifndef UTS_RELEASE
++ /* 2.6.18 onwards defines UTS_RELEASE in a separate header */
++# include <linux/utsrelease.h>
++# endif
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) || \
++ LINUX_VERSION_CODE >= KERNEL_VERSION(2,7,0)
++# error "Linux 2.6 required"
++#endif
++
++
++#include <linux/slab.h> /* kmalloc / kfree */
++#include <linux/vmalloc.h> /* vmalloc / vfree */
++#include <linux/interrupt.h>/* in_interrupt() */
++#include <linux/in.h>
++#include <linux/in6.h>
++#include <linux/spinlock.h>
++#include <linux/highmem.h>
++#include <linux/smp_lock.h>
++#include <linux/ctype.h>
++#include <linux/uio.h>
++#include <asm/current.h>
++#include <asm/errno.h>
++#include <asm/kmap_types.h>
++#include <asm/semaphore.h>
++
++#include <ci/tools/config.h>
++
++#define ci_in_irq in_irq
++#define ci_in_interrupt in_interrupt
++#define ci_in_atomic in_atomic
++
++
++/**********************************************************************
++ * Misc stuff.
++ */
++
++#ifdef BUG
++# define CI_BOMB BUG
++#endif
++
++ci_inline void* __ci_alloc(size_t n)
++{ return kmalloc(n, (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL)); }
++
++ci_inline void* __ci_atomic_alloc(size_t n)
++{ return kmalloc(n, GFP_ATOMIC ); }
++
++ci_inline void __ci_free(void* p) { return kfree(p); }
++ci_inline void* __ci_vmalloc(size_t n) { return vmalloc(n); }
++ci_inline void __ci_vfree(void* p) { return vfree(p); }
++
++
++#if CI_MEMLEAK_DEBUG_ALLOC_TABLE
++ #define ci_alloc(s) ci_alloc_memleak_debug (s, __FILE__, __LINE__)
++ #define ci_atomic_alloc(s) ci_atomic_alloc_memleak_debug(s, __FILE__, __LINE__)
++ #define ci_free ci_free_memleak_debug
++ #define ci_vmalloc(s) ci_vmalloc_memleak_debug (s, __FILE__,__LINE__)
++ #define ci_vfree ci_vfree_memleak_debug
++ #define ci_alloc_fn ci_alloc_fn_memleak_debug
++ #define ci_vmalloc_fn ci_vmalloc_fn_memleak_debug
++#else /* !CI_MEMLEAK_DEBUG_ALLOC_TABLE */
++ #define ci_alloc_fn __ci_alloc
++ #define ci_vmalloc_fn __ci_vmalloc
++#endif
++
++#ifndef ci_alloc
++ #define ci_atomic_alloc __ci_atomic_alloc
++ #define ci_alloc __ci_alloc
++ #define ci_free __ci_free
++ #define ci_vmalloc __ci_vmalloc
++ #define ci_vmalloc_fn __ci_vmalloc
++ #define ci_vfree __ci_vfree
++#endif
++
++#define ci_sprintf sprintf
++#define ci_vsprintf vsprintf
++#define ci_snprintf snprintf
++#define ci_vsnprintf vsnprintf
++#define ci_sscanf sscanf
++
++
++#define CI_LOG_FN_DEFAULT ci_log_syslog
++
++
++/*--------------------------------------------------------------------
++ *
++ * irqs_disabled - needed for kmap helpers on some kernels
++ *
++ *--------------------------------------------------------------------*/
++#ifdef irqs_disabled
++# define ci_irqs_disabled irqs_disabled
++#else
++# if defined(__i386__) | defined(__x86_64__)
++# define ci_irqs_disabled(x) \
++ ({ \
++ unsigned long flags; \
++ local_save_flags(flags); \
++ !(flags & (1<<9)); \
++ })
++# else
++# error "Need to implement irqs_disabled() for your architecture"
++# endif
++#endif
++
++
++/**********************************************************************
++ * kmap helpers.
++ *
++ * Use ci_k(un)map for code paths which are not in an atomic context.
++ * For atomic code you need to use ci_k(un)map_in_atomic. This will grab
++ * one of the per-CPU kmap slots.
++ *
++ * NB in_interrupt != in_irq. If you don't know the difference then
++ * don't use kmap_in_atomic
++ *
++ * 2.4 allocates kmap slots by function. We are going to re-use the
++ * skb module's slot - we also use the same interlock
++ *
++ * 2.6 allocates kmap slots by type as well as by function. We are
++ * going to use the currently (2.6.10) unsused SOFTIRQ slot
++ *
++ */
++
++ci_inline void* ci_kmap(struct page *page) {
++ CI_DEBUG(if( ci_in_atomic() | ci_in_interrupt() | ci_in_irq() ) BUG());
++ return kmap(page);
++}
++
++ci_inline void ci_kunmap(struct page *page) {
++ kunmap(page);
++}
++
++#define CI_KM_SLOT KM_SOFTIRQ0
++
++
++typedef struct semaphore ci_semaphore_t;
++
++ci_inline void
++ci_sem_init (ci_semaphore_t *sem, int val) {
++ sema_init (sem, val);
++}
++
++ci_inline void
++ci_sem_down (ci_semaphore_t *sem) {
++ down (sem);
++}
++
++ci_inline int
++ci_sem_trydown (ci_semaphore_t *sem) {
++ return down_trylock (sem);
++}
++
++ci_inline void
++ci_sem_up (ci_semaphore_t *sem) {
++ up (sem);
++}
++
++ci_inline int
++ci_sem_get_count(ci_semaphore_t *sem) {
++ return sem->count.counter;
++}
++
++ci_inline void* ci_kmap_in_atomic(struct page *page)
++{
++ CI_DEBUG(if( ci_in_irq() ) BUG());
++
++ /* iSCSI can call without in_interrupt() but with irqs_disabled()
++ and in a context that can't sleep, so we need to check that
++ too */
++ if(ci_in_interrupt() || ci_irqs_disabled())
++ return kmap_atomic(page, CI_KM_SLOT);
++ else
++ return kmap(page);
++}
++
++ci_inline void ci_kunmap_in_atomic(struct page *page, void* kaddr)
++{
++ CI_DEBUG(if( ci_in_irq() ) BUG());
++
++ /* iSCSI can call without in_interrupt() but with irqs_disabled()
++ and in a context that can't sleep, so we need to check that
++ too */
++ if(ci_in_interrupt() || ci_irqs_disabled())
++ kunmap_atomic(kaddr, CI_KM_SLOT);
++ else
++ kunmap(page);
++}
++
++/**********************************************************************
++ * spinlock implementation: used by <ci/tools/spinlock.h>
++ */
++
++#define CI_HAVE_SPINLOCKS
++
++typedef ci_uintptr_t ci_lock_holder_t;
++#define ci_lock_thisthread (ci_lock_holder_t)current
++#define ci_lock_no_holder (ci_lock_holder_t)NULL
++
++typedef spinlock_t ci_lock_i;
++typedef spinlock_t ci_irqlock_i;
++typedef unsigned long ci_irqlock_state_t;
++
++#define IRQLOCK_CYCLES 500000
++
++#define ci_lock_ctor_i(l) spin_lock_init(l)
++#define ci_lock_dtor_i(l) do{}while(0)
++#define ci_lock_lock_i(l) spin_lock(l)
++#define ci_lock_trylock_i(l) spin_trylock(l)
++#define ci_lock_unlock_i(l) spin_unlock(l)
++
++#define ci_irqlock_ctor_i(l) spin_lock_init(l)
++#define ci_irqlock_dtor_i(l) do{}while(0)
++#define ci_irqlock_lock_i(l,s) spin_lock_irqsave(l,*(s))
++#define ci_irqlock_unlock_i(l,s) spin_unlock_irqrestore(l, *(s))
++
++
++/**********************************************************************
++ * register access
++ */
++
++#include <asm/io.h>
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,9)
++typedef volatile void __iomem* ioaddr_t;
++#else
++typedef unsigned long ioaddr_t;
++#endif
++
++
++
++/**********************************************************************
++ * thread implementation -- kernel dependancies probably should be
++ * moved to driver/linux_kernel.h
++ */
++
++#define ci_linux_daemonize(name) daemonize(name)
++
++#include <linux/workqueue.h>
++
++
++typedef struct {
++ void* (*fn)(void* arg);
++ void* arg;
++ const char* name;
++ int thrd_id;
++ struct completion exit_event;
++ struct work_struct keventd_witem;
++} ci_kernel_thread_t;
++
++
++typedef ci_kernel_thread_t* cithread_t;
++
++
++extern int cithread_create(cithread_t* tid, void* (*fn)(void*), void* arg,
++ const char* name);
++extern int cithread_detach(cithread_t kt);
++extern int cithread_join(cithread_t kt);
++
++
++/* Kernel sysctl variables. */
++extern int sysctl_tcp_wmem[3];
++extern int sysctl_tcp_rmem[3];
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
++#define LINUX_HAS_SYSCTL_MEM_MAX
++extern ci_uint32 sysctl_wmem_max;
++extern ci_uint32 sysctl_rmem_max;
++#endif
++
++
++/*--------------------------------------------------------------------
++ *
++ * ci_bigbuf_t: An abstraction of a large buffer. Needed because in the
++ * Linux kernel, large buffers need to be allocated with vmalloc(), whereas
++ * smaller buffers should use kmalloc(). This abstraction chooses the
++ * appropriate mechansim.
++ *
++ *--------------------------------------------------------------------*/
++
++typedef struct {
++ char* p;
++ int is_vmalloc;
++} ci_bigbuf_t;
++
++
++ci_inline int ci_bigbuf_alloc(ci_bigbuf_t* bb, size_t bytes) {
++ if( bytes >= CI_PAGE_SIZE && ! ci_in_atomic() ) {
++ bb->is_vmalloc = 1;
++ if( (bb->p = vmalloc(bytes)) ) return 0;
++ }
++ bb->is_vmalloc = 0;
++ bb->p = kmalloc(bytes, ci_in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
++ return bb->p ? 0 : -ENOMEM;
++}
++
++ci_inline void ci_bigbuf_free(ci_bigbuf_t* bb) {
++ if( bb->is_vmalloc ) vfree(bb->p);
++ else kfree(bb->p);
++}
++
++ci_inline char* ci_bigbuf_ptr(ci_bigbuf_t* bb)
++{ return bb->p; }
++
++/**********************************************************************
++ * struct iovec abstraction (for Windows port)
++ */
++
++typedef struct iovec ci_iovec;
++
++/* Accessors for buffer/length */
++#define CI_IOVEC_BASE(i) ((i)->iov_base)
++#define CI_IOVEC_LEN(i) ((i)->iov_len)
++
++/**********************************************************************
++ * Signals
++ */
++
++ci_inline void
++ci_send_sig(int signum)
++{
++ send_sig(signum, current, 0);
++}
++
++#endif /* __CI_TOOLS_LINUX_KERNEL_H__ */
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netback/ci/tools/sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netback/ci/tools/sysdep.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,132 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*! \cidoxg_include_ci_tools */
++
++#ifndef __CI_TOOLS_SYSDEP_H__
++#define __CI_TOOLS_SYSDEP_H__
++
++/* Make this header self-sufficient */
++#include <ci/compat.h>
++#include <ci/tools/log.h>
++#include <ci/tools/debug.h>
++
++
++/**********************************************************************
++ * Platform dependencies.
++ */
++
++#if defined(__KERNEL__)
++
++# if defined(__linux__)
++# include <ci/tools/platform/linux_kernel.h>
++# elif defined(_WIN32)
++# include <ci/tools/platform/win32_kernel.h>
++# elif defined(__sun__)
++# include <ci/tools/platform/sunos_kernel.h>
++# else
++# error Unknown platform.
++# endif
++
++#elif defined(_WIN32)
++
++# include <ci/tools/platform/win32.h>
++
++#elif defined(__unix__)
++
++# include <ci/tools/platform/unix.h>
++
++#else
++
++# error Unknown platform.
++
++#endif
++
++#if defined(__linux__)
++/*! Linux sendfile() support enable/disable. */
++# define CI_HAVE_SENDFILE /* provide sendfile i/f */
++
++# define CI_HAVE_OS_NOPAGE
++#endif
++
++#if defined(__sun__)
++# define CI_HAVE_SENDFILE /* provide sendfile i/f */
++# define CI_HAVE_SENDFILEV /* provide sendfilev i/f */
++
++# define CI_IOCTL_SENDFILE /* use efrm CI_SENDFILEV ioctl */
++#endif
++
++#if defined(_WIN32)
++typedef ci_uint32 ci_uerr_t; /* range of OS user-mode return codes */
++typedef ci_uint32 ci_kerr_t; /* range of OS kernel-mode return codes */
++#elif defined(__unix__)
++typedef ci_int32 ci_uerr_t; /* range of OS user-mode return codes */
++typedef ci_int32 ci_kerr_t; /* range of OS kernel-mode return codes */
++#endif
++
++
++/**********************************************************************
++ * Compiler and processor dependencies.
++ */
++
++#if defined(__GNUC__)
++
++#if defined(__i386__) || defined(__x86_64__)
++# include <ci/tools/platform/gcc_x86.h>
++#elif defined(__PPC__)
++# include <ci/tools/platform/gcc_ppc.h>
++#elif defined(__ia64__)
++# include <ci/tools/platform/gcc_ia64.h>
++#else
++# error Unknown processor.
++#endif
++
++#elif defined(_MSC_VER)
++
++#if defined(__i386__)
++# include <ci/tools/platform/msvc_x86.h>
++# elif defined(__x86_64__)
++# include <ci/tools/platform/msvc_x86_64.h>
++#else
++# error Unknown processor.
++#endif
++
++#elif defined(__PGI)
++
++# include <ci/tools/platform/pg_x86.h>
++
++#elif defined(__INTEL_COMPILER)
++
++/* Intel compilers v7 claim to be very gcc compatible. */
++# include <ci/tools/platform/gcc_x86.h>
++
++#else
++# error Unknown compiler.
++#endif
++
++
++#endif /* __CI_TOOLS_SYSDEP_H__ */
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/Makefile 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,11 @@
++EXTRA_CFLAGS += -Idrivers/xen/sfc_netfront -Idrivers/xen/sfc_netutil -Idrivers/xen/netfront
++EXTRA_CFLAGS += -D__ci_driver__
++EXTRA_CFLAGS += -Werror
++
++ifdef GCOV
++EXTRA_CFLAGS += -fprofile-arcs -ftest-coverage -DEFX_GCOV
++endif
++
++obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_FRONTEND) := sfc_netfront.o
++
++sfc_netfront-objs := accel_msg.o accel_bufs.o accel_netfront.o accel_vi.o accel_xenbus.o accel_tso.o accel_ssr.o accel_debugfs.o falcon_event.o falcon_vi.o pt_tx.o vi_init.o
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel.h 2008-02-26 10:54:11.000000000 +0100
+@@ -0,0 +1,477 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NETFRONT_ACCEL_H
++#define NETFRONT_ACCEL_H
++
++#include "accel_msg_iface.h"
++#include "accel_cuckoo_hash.h"
++#include "accel_bufs.h"
++
++#include "etherfabric/ef_vi.h"
++
++#include <xen/xenbus.h>
++#include <xen/evtchn.h>
++
++#include <linux/kernel.h>
++#include <linux/list.h>
++
++enum netfront_accel_post_status {
++ NETFRONT_ACCEL_STATUS_GOOD,
++ NETFRONT_ACCEL_STATUS_BUSY,
++ NETFRONT_ACCEL_STATUS_CANT
++};
++
++#define NETFRONT_ACCEL_STATS 1
++#if NETFRONT_ACCEL_STATS
++#define NETFRONT_ACCEL_STATS_OP(x) x
++#else
++#define NETFRONT_ACCEL_STATS_OP(x)
++#endif
++
++
++enum netfront_accel_msg_state {
++ NETFRONT_ACCEL_MSG_NONE = 0,
++ NETFRONT_ACCEL_MSG_HELLO = 1,
++ NETFRONT_ACCEL_MSG_HW = 2
++};
++
++
++typedef struct {
++ u32 in_progress;
++ u32 total_len;
++ struct sk_buff *skb;
++} netfront_accel_jumbo_state;
++
++
++struct netfront_accel_ssr_state {
++ /** List of tracked connections. */
++ struct list_head conns;
++
++ /** Free efx_ssr_conn instances. */
++ struct list_head free_conns;
++};
++
++
++struct netfront_accel_netdev_stats {
++ /* Fastpath stats. */
++ u32 fastpath_rx_pkts;
++ u32 fastpath_rx_bytes;
++ u32 fastpath_rx_errors;
++ u32 fastpath_tx_pkts;
++ u32 fastpath_tx_bytes;
++ u32 fastpath_tx_errors;
++};
++
++
++struct netfront_accel_netdev_dbfs {
++ struct dentry *fastpath_rx_pkts;
++ struct dentry *fastpath_rx_bytes;
++ struct dentry *fastpath_rx_errors;
++ struct dentry *fastpath_tx_pkts;
++ struct dentry *fastpath_tx_bytes;
++ struct dentry *fastpath_tx_errors;
++};
++
++
++struct netfront_accel_stats {
++ /** Fast path events */
++ u64 fastpath_tx_busy;
++
++ /** TX DMA queue status */
++ u64 fastpath_tx_completions;
++
++ /** The number of events processed. */
++ u64 event_count;
++
++ /** Number of frame trunc events seen on fastpath */
++ u64 fastpath_frm_trunc;
++
++ /** Number of no rx descriptor trunc events seen on fastpath */
++ u64 rx_no_desc_trunc;
++
++ /** The number of misc bad events (e.g. RX_DISCARD) processed. */
++ u64 bad_event_count;
++
++ /** Number of events dealt with in poll loop */
++ u32 events_per_poll_max;
++ u32 events_per_poll_tx_max;
++ u32 events_per_poll_rx_max;
++
++ /** Largest number of concurrently outstanding tx descriptors */
++ u32 fastpath_tx_pending_max;
++
++ /** The number of events since the last interrupts. */
++ u32 event_count_since_irq;
++
++ /** The max number of events between interrupts. */
++ u32 events_per_irq_max;
++
++ /** The number of interrupts. */
++ u64 irq_count;
++
++ /** The number of useless interrupts. */
++ u64 useless_irq_count;
++
++ /** The number of polls scheduled. */
++ u64 poll_schedule_count;
++
++ /** The number of polls called. */
++ u64 poll_call_count;
++
++ /** The number of rechecks. */
++ u64 poll_reschedule_count;
++
++ /** Number of times we've called netif_stop_queue/netif_wake_queue */
++ u64 queue_stops;
++ u64 queue_wakes;
++
++ /** SSR stats */
++ u64 ssr_bursts;
++ u64 ssr_drop_stream;
++ u64 ssr_misorder;
++ u64 ssr_slow_start;
++ u64 ssr_merges;
++ u64 ssr_too_many;
++ u64 ssr_new_stream;
++};
++
++
++struct netfront_accel_dbfs {
++ struct dentry *fastpath_tx_busy;
++ struct dentry *fastpath_tx_completions;
++ struct dentry *fastpath_tx_pending_max;
++ struct dentry *fastpath_frm_trunc;
++ struct dentry *rx_no_desc_trunc;
++ struct dentry *event_count;
++ struct dentry *bad_event_count;
++ struct dentry *events_per_poll_max;
++ struct dentry *events_per_poll_rx_max;
++ struct dentry *events_per_poll_tx_max;
++ struct dentry *event_count_since_irq;
++ struct dentry *events_per_irq_max;
++ struct dentry *irq_count;
++ struct dentry *useless_irq_count;
++ struct dentry *poll_schedule_count;
++ struct dentry *poll_call_count;
++ struct dentry *poll_reschedule_count;
++ struct dentry *queue_stops;
++ struct dentry *queue_wakes;
++ struct dentry *ssr_bursts;
++ struct dentry *ssr_drop_stream;
++ struct dentry *ssr_misorder;
++ struct dentry *ssr_slow_start;
++ struct dentry *ssr_merges;
++ struct dentry *ssr_too_many;
++ struct dentry *ssr_new_stream;
++};
++
++
++typedef struct netfront_accel_vnic {
++ struct netfront_accel_vnic *next;
++
++ struct mutex vnic_mutex;
++
++ spinlock_t tx_lock;
++
++ struct netfront_accel_bufpages bufpages;
++ struct netfront_accel_bufinfo *rx_bufs;
++ struct netfront_accel_bufinfo *tx_bufs;
++
++ /** Hardware & VI state */
++ ef_vi vi;
++
++ ef_vi_state *vi_state;
++
++ ef_eventq_state evq_state;
++
++ void *evq_mapping;
++
++ /** Hardware dependant state */
++ union {
++ struct {
++ /** Falcon A or B */
++ enum net_accel_hw_type type;
++ u32 *evq_rptr;
++ u32 *doorbell;
++ void *evq_rptr_mapping;
++ void *doorbell_mapping;
++ void *txdmaq_mapping;
++ void *rxdmaq_mapping;
++ } falcon;
++ } hw;
++
++ /** RX DMA queue status */
++ u32 rx_dma_level;
++
++ /** Number of RX descriptors waiting to be pushed to the card. */
++ u32 rx_dma_batched;
++#define NETFRONT_ACCEL_RX_DESC_BATCH 16
++
++ /**
++ * Hash table of remote mac addresses to decide whether to try
++ * fast path
++ */
++ cuckoo_hash_table fastpath_table;
++ spinlock_t table_lock;
++
++ /** the local mac address of virtual interface we're accelerating */
++ u8 mac[ETH_ALEN];
++
++ int rx_pkt_stride;
++ int rx_skb_stride;
++
++ /**
++ * Keep track of fragments of jumbo packets as events are
++ * delivered by NIC
++ */
++ netfront_accel_jumbo_state jumbo_state;
++
++ struct net_device *net_dev;
++
++ /** These two gate the enabling of fast path operations */
++ int frontend_ready;
++ int backend_netdev_up;
++
++ int irq_enabled;
++ spinlock_t irq_enabled_lock;
++
++ int tx_enabled;
++
++ int poll_enabled;
++
++ /** A spare slot for a TX packet. This is treated as an extension
++ * of the DMA queue. */
++ struct sk_buff *tx_skb;
++
++ /** Keep track of fragments of SSR packets */
++ struct netfront_accel_ssr_state ssr_state;
++
++ struct xenbus_device *dev;
++
++ /** Event channel for messages */
++ int msg_channel;
++ int msg_channel_irq;
++
++ /** Event channel for network interrupts. */
++ int net_channel;
++ int net_channel_irq;
++
++ struct net_accel_shared_page *shared_page;
++
++ grant_ref_t ctrl_page_gnt;
++ grant_ref_t msg_page_gnt;
++
++ /** Message Qs, 1 each way. */
++ sh_msg_fifo2 to_dom0;
++ sh_msg_fifo2 from_dom0;
++
++ enum netfront_accel_msg_state msg_state;
++
++ /** Watch on accelstate */
++ struct xenbus_watch backend_accel_watch;
++ /** Watch on frontend's MAC address */
++ struct xenbus_watch mac_address_watch;
++
++ /** Work to process received irq/msg */
++ struct work_struct msg_from_bend;
++
++ /** Wait queue for changes in accelstate. */
++ wait_queue_head_t state_wait_queue;
++
++ /** The current accelstate of this driver. */
++ XenbusState frontend_state;
++
++ /** The most recent accelstate seen by the xenbus watch. */
++ XenbusState backend_state;
++
++ /** Non-zero if we should reject requests to connect. */
++ int removing;
++
++ /** Non-zero if the domU shared state has been initialised. */
++ int domU_state_is_setup;
++
++ /** Non-zero if the dom0 shared state has been initialised. */
++ int dom0_state_is_setup;
++
++ /* Those statistics that are added to the netdev stats */
++ struct netfront_accel_netdev_stats netdev_stats;
++ struct netfront_accel_netdev_stats stats_last_read;
++#ifdef CONFIG_DEBUG_FS
++ struct netfront_accel_netdev_dbfs netdev_dbfs;
++#endif
++
++ /* These statistics are internal and optional */
++#if NETFRONT_ACCEL_STATS
++ struct netfront_accel_stats stats;
++#ifdef CONFIG_DEBUG_FS
++ struct netfront_accel_dbfs dbfs;
++#endif
++#endif
++
++ /** Debufs fs dir for this interface */
++ struct dentry *dbfs_dir;
++} netfront_accel_vnic;
++
++
++/* Module parameters */
++extern unsigned sfc_netfront_max_pages;
++extern unsigned sfc_netfront_buffer_split;
++
++extern const char *frontend_name;
++extern struct netfront_accel_hooks accel_hooks;
++extern struct workqueue_struct *netfront_accel_workqueue;
++
++
++extern
++void netfront_accel_vi_ctor(netfront_accel_vnic *vnic);
++
++extern
++int netfront_accel_vi_init(netfront_accel_vnic *vnic,
++ struct net_accel_msg_hw *hw_msg);
++
++extern
++void netfront_accel_vi_dtor(netfront_accel_vnic *vnic);
++
++
++/**
++ * Add new buffers which have been registered with the NIC.
++ *
++ * @v vnic The vnic instance to process the response.
++ *
++ * The buffers contained in the message are added to the buffer pool.
++ */
++extern
++void netfront_accel_vi_add_bufs(netfront_accel_vnic *vnic, int is_rx);
++
++/**
++ * Put a packet on the tx DMA queue.
++ *
++ * @v vnic The vnic instance to accept the packet.
++ * @v skb A sk_buff to send.
++ *
++ * Attempt to send a packet. On success, the skb is owned by the DMA
++ * queue and will be released when the completion event arrives.
++ */
++extern enum netfront_accel_post_status
++netfront_accel_vi_tx_post(netfront_accel_vnic *vnic,
++ struct sk_buff *skb);
++
++
++/**
++ * Process events in response to an interrupt.
++ *
++ * @v vnic The vnic instance to poll.
++ * @v rx_packets The maximum number of rx packets to process.
++ * @ret rx_done The number of rx packets processed.
++ *
++ * The vnic will process events until there are no more events
++ * remaining or the specified number of rx packets has been processed.
++ * The split from the interrupt call is to allow Linux NAPI
++ * polling.
++ */
++extern
++int netfront_accel_vi_poll(netfront_accel_vnic *vnic, int rx_packets);
++
++
++/**
++ * Iterate over the fragments of a packet buffer.
++ *
++ * @v skb The packet buffer to examine.
++ * @v idx A variable name for the fragment index.
++ * @v data A variable name for the address of the fragment data.
++ * @v length A variable name for the fragment length.
++ * @v code A section of code to execute for each fragment.
++ *
++ * This macro iterates over the fragments in a packet buffer and
++ * executes the code for each of them.
++ */
++#define NETFRONT_ACCEL_PKTBUFF_FOR_EACH_FRAGMENT(skb, frag_idx, \
++ frag_data, frag_len, \
++ code) \
++ do { \
++ int frag_idx; \
++ void *frag_data; \
++ unsigned int frag_len; \
++ \
++ frag_data = skb->data; \
++ frag_len = skb_headlen(skb); \
++ frag_idx = 0; \
++ while (1) { /* For each fragment */ \
++ code; \
++ if (frag_idx >= skb_shinfo(skb)->nr_frags) { \
++ break; \
++ } else { \
++ skb_frag_t *fragment; \
++ fragment = &skb_shinfo(skb)->frags[frag_idx]; \
++ frag_len = fragment->size; \
++ frag_data = ((void*)page_address(fragment->page) \
++ + fragment->page_offset); \
++ }; \
++ frag_idx++; \
++ } \
++ } while(0)
++
++static inline
++void netfront_accel_disable_net_interrupts(netfront_accel_vnic *vnic)
++{
++ mask_evtchn(vnic->net_channel);
++}
++
++static inline
++void netfront_accel_enable_net_interrupts(netfront_accel_vnic *vnic)
++{
++ unmask_evtchn(vnic->net_channel);
++}
++
++void netfront_accel_msg_tx_fastpath(netfront_accel_vnic *vnic, const void *mac,
++ u32 ip, u16 port, u8 protocol);
++
++/* Process an IRQ received from back end driver */
++irqreturn_t netfront_accel_msg_channel_irq_from_bend(int irq, void *context,
++ struct pt_regs *unused);
++irqreturn_t netfront_accel_net_channel_irq_from_bend(int irq, void *context,
++ struct pt_regs *unused);
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++extern void netfront_accel_msg_from_bend(struct work_struct *context);
++#else
++extern void netfront_accel_msg_from_bend(void *context);
++#endif
++
++extern void vnic_stop_fastpath(netfront_accel_vnic *vnic);
++
++extern int netfront_accel_probe(struct net_device *net_dev,
++ struct xenbus_device *dev);
++extern int netfront_accel_remove(struct xenbus_device *dev);
++extern void netfront_accel_set_closing(netfront_accel_vnic *vnic);
++
++extern int netfront_accel_vi_enable_interrupts(netfront_accel_vnic *vnic);
++
++extern void netfront_accel_debugfs_init(void);
++extern void netfront_accel_debugfs_fini(void);
++extern int netfront_accel_debugfs_create(netfront_accel_vnic *vnic);
++extern int netfront_accel_debugfs_remove(netfront_accel_vnic *vnic);
++
++#endif /* NETFRONT_ACCEL_H */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_bufs.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_bufs.c 2008-02-26 10:54:12.000000000 +0100
+@@ -0,0 +1,393 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <xen/gnttab.h>
++
++#include "accel_bufs.h"
++#include "accel_util.h"
++
++#include "accel.h"
++
++
++static int
++netfront_accel_alloc_buf_desc_blocks(struct netfront_accel_bufinfo *manager,
++ int pages)
++{
++ manager->desc_blocks =
++ kzalloc(sizeof(struct netfront_accel_pkt_desc *) *
++ NETFRONT_ACCEL_BUF_NUM_BLOCKS(pages), GFP_KERNEL);
++ if (manager->desc_blocks == NULL) {
++ return -ENOMEM;
++ }
++
++ return 0;
++}
++
++static int
++netfront_accel_alloc_buf_lists(struct netfront_accel_bufpages *bufpages,
++ int pages)
++{
++ bufpages->page_list = kmalloc(pages * sizeof(void *), GFP_KERNEL);
++ if (bufpages->page_list == NULL) {
++ return -ENOMEM;
++ }
++
++ bufpages->grant_list = kzalloc(pages * sizeof(grant_ref_t), GFP_KERNEL);
++ if (bufpages->grant_list == NULL) {
++ kfree(bufpages->page_list);
++ bufpages->page_list = NULL;
++ return -ENOMEM;
++ }
++
++ return 0;
++}
++
++
++int netfront_accel_alloc_buffer_mem(struct netfront_accel_bufpages *bufpages,
++ struct netfront_accel_bufinfo *rx_manager,
++ struct netfront_accel_bufinfo *tx_manager,
++ int pages)
++{
++ int n, rc;
++
++ if ((rc = netfront_accel_alloc_buf_desc_blocks
++ (rx_manager, pages - (pages / sfc_netfront_buffer_split))) < 0) {
++ goto rx_fail;
++ }
++
++ if ((rc = netfront_accel_alloc_buf_desc_blocks
++ (tx_manager, pages / sfc_netfront_buffer_split)) < 0) {
++ goto tx_fail;
++ }
++
++ if ((rc = netfront_accel_alloc_buf_lists(bufpages, pages)) < 0) {
++ goto lists_fail;
++ }
++
++ for (n = 0; n < pages; n++) {
++ void *tmp = (void*)__get_free_page(GFP_KERNEL);
++ if (tmp == NULL)
++ break;
++
++ bufpages->page_list[n] = tmp;
++ }
++
++ if (n != pages) {
++ EPRINTK("%s: not enough pages: %d != %d\n", __FUNCTION__, n,
++ pages);
++ for (; n >= 0; n--)
++ free_page((unsigned long)(bufpages->page_list[n]));
++ rc = -ENOMEM;
++ goto pages_fail;
++ }
++
++ bufpages->max_pages = pages;
++ bufpages->page_reqs = 0;
++
++ return 0;
++
++ pages_fail:
++ kfree(bufpages->page_list);
++ kfree(bufpages->grant_list);
++
++ bufpages->page_list = NULL;
++ bufpages->grant_list = NULL;
++ lists_fail:
++ kfree(tx_manager->desc_blocks);
++ tx_manager->desc_blocks = NULL;
++
++ tx_fail:
++ kfree(rx_manager->desc_blocks);
++ rx_manager->desc_blocks = NULL;
++ rx_fail:
++ return rc;
++}
++
++
++void netfront_accel_free_buffer_mem(struct netfront_accel_bufpages *bufpages,
++ struct netfront_accel_bufinfo *rx_manager,
++ struct netfront_accel_bufinfo *tx_manager)
++{
++ int i;
++
++ for (i = 0; i < bufpages->max_pages; i++) {
++ if (bufpages->grant_list[i] != 0)
++ net_accel_ungrant_page(bufpages->grant_list[i]);
++ free_page((unsigned long)(bufpages->page_list[i]));
++ }
++
++ if (bufpages->max_pages) {
++ kfree(bufpages->page_list);
++ kfree(bufpages->grant_list);
++ kfree(rx_manager->desc_blocks);
++ kfree(tx_manager->desc_blocks);
++ }
++}
++
++
++/*
++ * Allocate memory for the buffer manager and create a lock. If no
++ * lock is supplied its own is allocated.
++ */
++struct netfront_accel_bufinfo *netfront_accel_init_bufs(spinlock_t *lock)
++{
++ struct netfront_accel_bufinfo *res = kmalloc(sizeof(*res), GFP_KERNEL);
++ if (res != NULL) {
++ res->npages = res->nused = 0;
++ res->first_free = -1;
++
++ if (lock == NULL) {
++ res->lock = kmalloc(sizeof(*res->lock), GFP_KERNEL);
++ if (res->lock == NULL) {
++ kfree(res);
++ return NULL;
++ }
++ spin_lock_init(res->lock);
++ res->internally_locked = 1;
++ } else {
++ res->lock = lock;
++ res->internally_locked = 0;
++ }
++
++ res->desc_blocks = NULL;
++ }
++
++ return res;
++}
++
++
++void netfront_accel_fini_bufs(struct netfront_accel_bufinfo *bufs)
++{
++ if (bufs->internally_locked)
++ kfree(bufs->lock);
++ kfree(bufs);
++}
++
++
++int netfront_accel_buf_map_request(struct xenbus_device *dev,
++ struct netfront_accel_bufpages *bufpages,
++ struct net_accel_msg *msg,
++ int pages, int offset)
++{
++ int i, mfn;
++ int err;
++
++ net_accel_msg_init(msg, NET_ACCEL_MSG_MAPBUF);
++
++ BUG_ON(pages > NET_ACCEL_MSG_MAX_PAGE_REQ);
++
++ msg->u.mapbufs.pages = pages;
++
++ for (i = 0; i < msg->u.mapbufs.pages; i++) {
++ /*
++ * This can happen if we tried to send this message
++ * earlier but the queue was full.
++ */
++ if (bufpages->grant_list[offset+i] != 0) {
++ msg->u.mapbufs.grants[i] =
++ bufpages->grant_list[offset+i];
++ continue;
++ }
++
++ mfn = virt_to_mfn(bufpages->page_list[offset+i]);
++ VPRINTK("%s: Granting page %d, mfn %08x\n",
++ __FUNCTION__, i, mfn);
++
++ bufpages->grant_list[offset+i] =
++ net_accel_grant_page(dev, mfn, 0);
++ msg->u.mapbufs.grants[i] = bufpages->grant_list[offset+i];
++
++ if (msg->u.mapbufs.grants[i] < 0) {
++ EPRINTK("%s: Failed to grant buffer: %d\n",
++ __FUNCTION__, msg->u.mapbufs.grants[i]);
++ err = -EIO;
++ goto error;
++ }
++ }
++
++ /* This is interpreted on return as the offset in the the page_list */
++ msg->u.mapbufs.reqid = offset;
++
++ return 0;
++
++error:
++ /* Ungrant all the pages we've successfully granted. */
++ for (i--; i >= 0; i--) {
++ net_accel_ungrant_page(bufpages->grant_list[offset+i]);
++ bufpages->grant_list[offset+i] = 0;
++ }
++ return err;
++}
++
++
++/* Process a response to a buffer request. */
++int netfront_accel_add_bufs(struct netfront_accel_bufpages *bufpages,
++ struct netfront_accel_bufinfo *manager,
++ struct net_accel_msg *msg)
++{
++ int msg_pages, page_offset, i, newtot;
++ int old_block_count, new_block_count;
++ u32 msg_buf;
++ unsigned long flags;
++
++ VPRINTK("%s: manager %p msg %p\n", __FUNCTION__, manager, msg);
++
++ BUG_ON(msg->id != (NET_ACCEL_MSG_MAPBUF | NET_ACCEL_MSG_REPLY));
++
++ msg_pages = msg->u.mapbufs.pages;
++ msg_buf = msg->u.mapbufs.buf;
++ page_offset = msg->u.mapbufs.reqid;
++
++ spin_lock_irqsave(manager->lock, flags);
++ newtot = manager->npages + msg_pages;
++ old_block_count =
++ (manager->npages + NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK - 1) >>
++ NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK_SHIFT;
++ new_block_count =
++ (newtot + NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK - 1) >>
++ NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK_SHIFT;
++
++ for (i = old_block_count; i < new_block_count; i++) {
++ struct netfront_accel_pkt_desc *block;
++ if (manager->desc_blocks[i] != NULL) {
++ VPRINTK("Not needed\n");
++ continue;
++ }
++ block = kzalloc(NETFRONT_ACCEL_BUFS_PER_BLOCK *
++ sizeof(netfront_accel_pkt_desc), GFP_ATOMIC);
++ if (block == NULL) {
++ spin_unlock_irqrestore(manager->lock, flags);
++ return -ENOMEM;
++ }
++ manager->desc_blocks[i] = block;
++ }
++ for (i = manager->npages; i < newtot; i++) {
++ int k, j = i - manager->npages;
++ int block_num;
++ int block_idx;
++ struct netfront_accel_pkt_desc *pkt;
++
++ block_num = i >> NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK_SHIFT;
++ block_idx = (NETFRONT_ACCEL_BUFS_PER_PAGE*i)
++ & (NETFRONT_ACCEL_BUFS_PER_BLOCK-1);
++
++ pkt = manager->desc_blocks[block_num] + block_idx;
++
++ for (k = 0; k < NETFRONT_ACCEL_BUFS_PER_PAGE; k++) {
++ BUG_ON(page_offset + j >= bufpages->max_pages);
++
++ pkt[k].buf_id = NETFRONT_ACCEL_BUFS_PER_PAGE * i + k;
++ pkt[k].pkt_kva = bufpages->page_list[page_offset + j] +
++ (PAGE_SIZE/NETFRONT_ACCEL_BUFS_PER_PAGE) * k;
++ pkt[k].pkt_buff_addr = msg_buf +
++ (PAGE_SIZE/NETFRONT_ACCEL_BUFS_PER_PAGE) *
++ (NETFRONT_ACCEL_BUFS_PER_PAGE * j + k);
++ pkt[k].next_free = manager->first_free;
++ manager->first_free = pkt[k].buf_id;
++ *(int*)(pkt[k].pkt_kva) = pkt[k].buf_id;
++
++ VPRINTK("buf %d desc %p kva %p buffaddr %x\n",
++ pkt[k].buf_id, &(pkt[k]), pkt[k].pkt_kva,
++ pkt[k].pkt_buff_addr);
++ }
++ }
++ manager->npages = newtot;
++ spin_unlock_irqrestore(manager->lock, flags);
++ VPRINTK("Added %d pages. Total is now %d\n", msg_pages,
++ manager->npages);
++ return 0;
++}
++
++
++netfront_accel_pkt_desc *
++netfront_accel_buf_find(struct netfront_accel_bufinfo *manager, u16 id)
++{
++ netfront_accel_pkt_desc *pkt;
++ int block_num = id >> NETFRONT_ACCEL_BUFS_PER_BLOCK_SHIFT;
++ int block_idx = id & (NETFRONT_ACCEL_BUFS_PER_BLOCK - 1);
++ BUG_ON(id >= manager->npages * NETFRONT_ACCEL_BUFS_PER_PAGE);
++ BUG_ON(block_idx >= NETFRONT_ACCEL_BUFS_PER_BLOCK);
++ pkt = manager->desc_blocks[block_num] + block_idx;
++ return pkt;
++}
++
++
++/* Allocate a buffer from the buffer manager */
++netfront_accel_pkt_desc *
++netfront_accel_buf_get(struct netfront_accel_bufinfo *manager)
++{
++ int bufno = -1;
++ netfront_accel_pkt_desc *buf = NULL;
++ unsigned long flags = 0;
++
++ /* Any spare? */
++ if (manager->first_free == -1)
++ return NULL;
++ /* Take lock */
++ if (manager->internally_locked)
++ spin_lock_irqsave(manager->lock, flags);
++ bufno = manager->first_free;
++ if (bufno != -1) {
++ buf = netfront_accel_buf_find(manager, bufno);
++ manager->first_free = buf->next_free;
++ manager->nused++;
++ }
++ /* Release lock */
++ if (manager->internally_locked)
++ spin_unlock_irqrestore(manager->lock, flags);
++
++ /* Tell the world */
++ VPRINTK("Allocated buffer %i, buffaddr %x\n", bufno,
++ buf->pkt_buff_addr);
++
++ return buf;
++}
++
++
++/* Release a buffer back to the buffer manager pool */
++int netfront_accel_buf_put(struct netfront_accel_bufinfo *manager, u16 id)
++{
++ netfront_accel_pkt_desc *buf = netfront_accel_buf_find(manager, id);
++ unsigned long flags = 0;
++ unsigned was_empty = 0;
++ int bufno = id;
++
++ VPRINTK("Freeing buffer %i\n", id);
++ BUG_ON(id == (u16)-1);
++
++ if (manager->internally_locked)
++ spin_lock_irqsave(manager->lock, flags);
++
++ if (manager->first_free == -1)
++ was_empty = 1;
++
++ buf->next_free = manager->first_free;
++ manager->first_free = bufno;
++ manager->nused--;
++
++ if (manager->internally_locked)
++ spin_unlock_irqrestore(manager->lock, flags);
++
++ return was_empty;
++}
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_bufs.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_bufs.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,181 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NETFRONT_ACCEL_BUFS_H
++#define NETFRONT_ACCEL_BUFS_H
++
++#include <linux/skbuff.h>
++#include <linux/spinlock.h>
++#include <xen/xenbus.h>
++
++#include "accel_msg_iface.h"
++
++
++/*! Buffer descriptor structure */
++typedef struct netfront_accel_pkt_desc {
++ int buf_id;
++ u32 pkt_buff_addr;
++ void *pkt_kva;
++ /* This is the socket buffer currently married to this buffer */
++ struct sk_buff *skb;
++ int next_free;
++} netfront_accel_pkt_desc;
++
++
++#define NETFRONT_ACCEL_DEFAULT_BUF_PAGES (384)
++#define NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK_SHIFT (4)
++#define NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK \
++ (1 << (NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK_SHIFT))
++#define NETFRONT_ACCEL_BUFS_PER_PAGE_SHIFT (1)
++#define NETFRONT_ACCEL_BUFS_PER_PAGE \
++ (1 << (NETFRONT_ACCEL_BUFS_PER_PAGE_SHIFT))
++#define NETFRONT_ACCEL_BUFS_PER_BLOCK_SHIFT \
++ (NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK_SHIFT + \
++ NETFRONT_ACCEL_BUFS_PER_PAGE_SHIFT)
++#define NETFRONT_ACCEL_BUFS_PER_BLOCK \
++ (1 << NETFRONT_ACCEL_BUFS_PER_BLOCK_SHIFT)
++#define NETFRONT_ACCEL_BUF_NUM_BLOCKS(max_pages) \
++ (((max_pages)+NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK-1) / \
++ NETFRONT_ACCEL_BUF_PAGES_PER_BLOCK)
++
++/*! Buffer management structure. */
++struct netfront_accel_bufinfo {
++ /* number added to this manager */
++ unsigned npages;
++ /* number currently used from this manager */
++ unsigned nused;
++
++ int first_free;
++
++ int internally_locked;
++ spinlock_t *lock;
++
++ /*
++ * array of pointers (length NETFRONT_ACCEL_BUF_NUM_BLOCKS) to
++ * pkt descs
++ */
++ struct netfront_accel_pkt_desc **desc_blocks;
++};
++
++
++struct netfront_accel_bufpages {
++ /* length of lists of pages/grants */
++ int max_pages;
++ /* list of pages allocated for network buffers */
++ void **page_list;
++ /* list of grants for the above pages */
++ grant_ref_t *grant_list;
++
++ /* number of page requests that have been made */
++ unsigned page_reqs;
++};
++
++
++/*! Allocate memory for the buffer manager, set up locks etc.
++ * Optionally takes a lock to use, if not supplied it makes its own.
++ *
++ * \return pointer to netfront_accel_bufinfo structure that represents the
++ * buffer manager
++ */
++extern struct netfront_accel_bufinfo *
++netfront_accel_init_bufs(spinlock_t *lock);
++
++/*! Allocate memory for the buffers
++ */
++extern int
++netfront_accel_alloc_buffer_mem(struct netfront_accel_bufpages *bufpages,
++ struct netfront_accel_bufinfo *rx_res,
++ struct netfront_accel_bufinfo *tx_res,
++ int pages);
++extern void
++netfront_accel_free_buffer_mem(struct netfront_accel_bufpages *bufpages,
++ struct netfront_accel_bufinfo *rx_res,
++ struct netfront_accel_bufinfo *tx_res);
++
++/*! Release memory for the buffer manager, buffers, etc.
++ *
++ * \param manager pointer to netfront_accel_bufinfo structure that
++ * represents the buffer manager
++ */
++extern void netfront_accel_fini_bufs(struct netfront_accel_bufinfo *manager);
++
++/*! Release a buffer.
++ *
++ * \param manager The buffer manager which owns the buffer.
++ * \param id The buffer identifier.
++ */
++extern int netfront_accel_buf_put(struct netfront_accel_bufinfo *manager,
++ u16 id);
++
++/*! Get the packet descriptor associated with a buffer id.
++ *
++ * \param manager The buffer manager which owns the buffer.
++ * \param id The buffer identifier.
++ *
++ * The returned value is the packet descriptor for this buffer.
++ */
++extern netfront_accel_pkt_desc *
++netfront_accel_buf_find(struct netfront_accel_bufinfo *manager, u16 id);
++
++
++/*! Fill out a message request for some buffers to be mapped by the
++ * back end driver
++ *
++ * \param manager The buffer manager
++ * \param msg Pointer to an ef_msg to complete.
++ * \return 0 on success
++ */
++extern int
++netfront_accel_buf_map_request(struct xenbus_device *dev,
++ struct netfront_accel_bufpages *bufpages,
++ struct net_accel_msg *msg,
++ int pages, int offset);
++
++/*! Process a response to a buffer request.
++ *
++ * Deal with a received message from the back end in response to our
++ * request for buffers
++ *
++ * \param manager The buffer manager
++ * \param msg The received message from the back end describing new
++ * buffers
++ * \return 0 on success
++ */
++extern int
++netfront_accel_add_bufs(struct netfront_accel_bufpages *bufpages,
++ struct netfront_accel_bufinfo *manager,
++ struct net_accel_msg *msg);
++
++
++/*! Allocate a buffer from the buffer manager
++ *
++ * \param manager The buffer manager data structure
++ * \param id On exit, the id of the buffer allocated
++ * \return Pointer to buffer descriptor.
++ */
++struct netfront_accel_pkt_desc *
++netfront_accel_buf_get(struct netfront_accel_bufinfo *manager);
++
++#endif /* NETFRONT_ACCEL_BUFS_H */
++
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_debugfs.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_debugfs.c 2008-02-26 10:54:12.000000000 +0100
+@@ -0,0 +1,211 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/fs.h>
++#include <linux/debugfs.h>
++
++#include "accel.h"
++
++#if defined(CONFIG_DEBUG_FS)
++static struct dentry *sfc_debugfs_root = NULL;
++#endif
++
++void netfront_accel_debugfs_init(void)
++{
++#if defined(CONFIG_DEBUG_FS)
++ sfc_debugfs_root = debugfs_create_dir(frontend_name, NULL);
++#endif
++}
++
++
++void netfront_accel_debugfs_fini(void)
++{
++#if defined(CONFIG_DEBUG_FS)
++ if (sfc_debugfs_root)
++ debugfs_remove(sfc_debugfs_root);
++#endif
++}
++
++
++int netfront_accel_debugfs_create(netfront_accel_vnic *vnic)
++{
++#if defined(CONFIG_DEBUG_FS)
++ if (sfc_debugfs_root == NULL)
++ return -ENOENT;
++
++ vnic->dbfs_dir = debugfs_create_dir(vnic->net_dev->name,
++ sfc_debugfs_root);
++ if (vnic->dbfs_dir == NULL)
++ return -ENOMEM;
++
++ vnic->netdev_dbfs.fastpath_rx_pkts = debugfs_create_u32
++ ("fastpath_rx_pkts", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->netdev_stats.fastpath_rx_pkts);
++ vnic->netdev_dbfs.fastpath_rx_bytes = debugfs_create_u32
++ ("fastpath_rx_bytes", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->netdev_stats.fastpath_rx_bytes);
++ vnic->netdev_dbfs.fastpath_rx_errors = debugfs_create_u32
++ ("fastpath_rx_errors", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->netdev_stats.fastpath_rx_errors);
++ vnic->netdev_dbfs.fastpath_tx_pkts = debugfs_create_u32
++ ("fastpath_tx_pkts", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->netdev_stats.fastpath_tx_pkts);
++ vnic->netdev_dbfs.fastpath_tx_bytes = debugfs_create_u32
++ ("fastpath_tx_bytes", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->netdev_stats.fastpath_tx_bytes);
++ vnic->netdev_dbfs.fastpath_tx_errors = debugfs_create_u32
++ ("fastpath_tx_errors", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->netdev_stats.fastpath_tx_errors);
++
++#if NETFRONT_ACCEL_STATS
++ vnic->dbfs.irq_count = debugfs_create_u64
++ ("irq_count", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.irq_count);
++ vnic->dbfs.useless_irq_count = debugfs_create_u64
++ ("useless_irq_count", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.useless_irq_count);
++ vnic->dbfs.poll_schedule_count = debugfs_create_u64
++ ("poll_schedule_count", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.poll_schedule_count);
++ vnic->dbfs.poll_call_count = debugfs_create_u64
++ ("poll_call_count", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.poll_call_count);
++ vnic->dbfs.poll_reschedule_count = debugfs_create_u64
++ ("poll_reschedule_count", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.poll_reschedule_count);
++ vnic->dbfs.queue_stops = debugfs_create_u64
++ ("queue_stops", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.queue_stops);
++ vnic->dbfs.queue_wakes = debugfs_create_u64
++ ("queue_wakes", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.queue_wakes);
++ vnic->dbfs.ssr_bursts = debugfs_create_u64
++ ("ssr_bursts", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.ssr_bursts);
++ vnic->dbfs.ssr_drop_stream = debugfs_create_u64
++ ("ssr_drop_stream", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.ssr_drop_stream);
++ vnic->dbfs.ssr_misorder = debugfs_create_u64
++ ("ssr_misorder", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.ssr_misorder);
++ vnic->dbfs.ssr_slow_start = debugfs_create_u64
++ ("ssr_slow_start", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.ssr_slow_start);
++ vnic->dbfs.ssr_merges = debugfs_create_u64
++ ("ssr_merges", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.ssr_merges);
++ vnic->dbfs.ssr_too_many = debugfs_create_u64
++ ("ssr_too_many", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.ssr_too_many);
++ vnic->dbfs.ssr_new_stream = debugfs_create_u64
++ ("ssr_new_stream", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.ssr_new_stream);
++
++ vnic->dbfs.fastpath_tx_busy = debugfs_create_u64
++ ("fastpath_tx_busy", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.fastpath_tx_busy);
++ vnic->dbfs.fastpath_tx_completions = debugfs_create_u64
++ ("fastpath_tx_completions", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.fastpath_tx_completions);
++ vnic->dbfs.fastpath_tx_pending_max = debugfs_create_u32
++ ("fastpath_tx_pending_max", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.fastpath_tx_pending_max);
++ vnic->dbfs.event_count = debugfs_create_u64
++ ("event_count", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.event_count);
++ vnic->dbfs.bad_event_count = debugfs_create_u64
++ ("bad_event_count", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.bad_event_count);
++ vnic->dbfs.event_count_since_irq = debugfs_create_u32
++ ("event_count_since_irq", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.event_count_since_irq);
++ vnic->dbfs.events_per_irq_max = debugfs_create_u32
++ ("events_per_irq_max", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.events_per_irq_max);
++ vnic->dbfs.fastpath_frm_trunc = debugfs_create_u64
++ ("fastpath_frm_trunc", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.fastpath_frm_trunc);
++ vnic->dbfs.rx_no_desc_trunc = debugfs_create_u64
++ ("rx_no_desc_trunc", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.rx_no_desc_trunc);
++ vnic->dbfs.events_per_poll_max = debugfs_create_u32
++ ("events_per_poll_max", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.events_per_poll_max);
++ vnic->dbfs.events_per_poll_rx_max = debugfs_create_u32
++ ("events_per_poll_rx_max", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.events_per_poll_rx_max);
++ vnic->dbfs.events_per_poll_tx_max = debugfs_create_u32
++ ("events_per_poll_tx_max", S_IRUSR | S_IRGRP | S_IROTH,
++ vnic->dbfs_dir, &vnic->stats.events_per_poll_tx_max);
++#endif
++#endif
++ return 0;
++}
++
++
++int netfront_accel_debugfs_remove(netfront_accel_vnic *vnic)
++{
++#if defined(CONFIG_DEBUG_FS)
++ if (vnic->dbfs_dir != NULL) {
++ debugfs_remove(vnic->netdev_dbfs.fastpath_rx_pkts);
++ debugfs_remove(vnic->netdev_dbfs.fastpath_rx_bytes);
++ debugfs_remove(vnic->netdev_dbfs.fastpath_rx_errors);
++ debugfs_remove(vnic->netdev_dbfs.fastpath_tx_pkts);
++ debugfs_remove(vnic->netdev_dbfs.fastpath_tx_bytes);
++ debugfs_remove(vnic->netdev_dbfs.fastpath_tx_errors);
++
++#if NETFRONT_ACCEL_STATS
++ debugfs_remove(vnic->dbfs.irq_count);
++ debugfs_remove(vnic->dbfs.useless_irq_count);
++ debugfs_remove(vnic->dbfs.poll_schedule_count);
++ debugfs_remove(vnic->dbfs.poll_call_count);
++ debugfs_remove(vnic->dbfs.poll_reschedule_count);
++ debugfs_remove(vnic->dbfs.queue_stops);
++ debugfs_remove(vnic->dbfs.queue_wakes);
++ debugfs_remove(vnic->dbfs.ssr_bursts);
++ debugfs_remove(vnic->dbfs.ssr_drop_stream);
++ debugfs_remove(vnic->dbfs.ssr_misorder);
++ debugfs_remove(vnic->dbfs.ssr_slow_start);
++ debugfs_remove(vnic->dbfs.ssr_merges);
++ debugfs_remove(vnic->dbfs.ssr_too_many);
++ debugfs_remove(vnic->dbfs.ssr_new_stream);
++
++ debugfs_remove(vnic->dbfs.fastpath_tx_busy);
++ debugfs_remove(vnic->dbfs.fastpath_tx_completions);
++ debugfs_remove(vnic->dbfs.fastpath_tx_pending_max);
++ debugfs_remove(vnic->dbfs.event_count);
++ debugfs_remove(vnic->dbfs.bad_event_count);
++ debugfs_remove(vnic->dbfs.event_count_since_irq);
++ debugfs_remove(vnic->dbfs.events_per_irq_max);
++ debugfs_remove(vnic->dbfs.fastpath_frm_trunc);
++ debugfs_remove(vnic->dbfs.rx_no_desc_trunc);
++ debugfs_remove(vnic->dbfs.events_per_poll_max);
++ debugfs_remove(vnic->dbfs.events_per_poll_rx_max);
++ debugfs_remove(vnic->dbfs.events_per_poll_tx_max);
++#endif
++ debugfs_remove(vnic->dbfs_dir);
++ }
++#endif
++ return 0;
++}
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_msg.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_msg.c 2008-02-26 10:54:12.000000000 +0100
+@@ -0,0 +1,566 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/stddef.h>
++#include <linux/errno.h>
++
++#include <xen/xenbus.h>
++
++#include "accel.h"
++#include "accel_msg_iface.h"
++#include "accel_util.h"
++#include "accel_bufs.h"
++
++#include "netfront.h" /* drivers/xen/netfront/netfront.h */
++
++static void vnic_start_interrupts(netfront_accel_vnic *vnic)
++{
++ unsigned long flags;
++
++ /* Prime our interrupt */
++ spin_lock_irqsave(&vnic->irq_enabled_lock, flags);
++ if (!netfront_accel_vi_enable_interrupts(vnic)) {
++ /* Cripes, that was quick, better pass it up */
++ netfront_accel_disable_net_interrupts(vnic);
++ vnic->irq_enabled = 0;
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.poll_schedule_count++);
++ netif_rx_schedule(vnic->net_dev);
++ } else {
++ /*
++ * Nothing yet, make sure we get interrupts through
++ * back end
++ */
++ vnic->irq_enabled = 1;
++ netfront_accel_enable_net_interrupts(vnic);
++ }
++ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
++}
++
++
++static void vnic_stop_interrupts(netfront_accel_vnic *vnic)
++{
++ unsigned long flags;
++
++ spin_lock_irqsave(&vnic->irq_enabled_lock, flags);
++ netfront_accel_disable_net_interrupts(vnic);
++ vnic->irq_enabled = 0;
++ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
++}
++
++
++static void vnic_start_fastpath(netfront_accel_vnic *vnic)
++{
++ struct net_device *net_dev = vnic->net_dev;
++ unsigned long flags;
++
++ DPRINTK("%s\n", __FUNCTION__);
++
++ spin_lock_irqsave(&vnic->tx_lock, flags);
++ vnic->tx_enabled = 1;
++ spin_unlock_irqrestore(&vnic->tx_lock, flags);
++
++ netif_poll_disable(net_dev);
++ vnic->poll_enabled = 1;
++ netif_poll_enable(net_dev);
++
++ vnic_start_interrupts(vnic);
++}
++
++
++void vnic_stop_fastpath(netfront_accel_vnic *vnic)
++{
++ struct net_device *net_dev = vnic->net_dev;
++ struct netfront_info *np = (struct netfront_info *)netdev_priv(net_dev);
++ unsigned long flags1, flags2;
++
++ DPRINTK("%s\n", __FUNCTION__);
++
++ vnic_stop_interrupts(vnic);
++
++ spin_lock_irqsave(&vnic->tx_lock, flags1);
++ vnic->tx_enabled = 0;
++ spin_lock_irqsave(&np->tx_lock, flags2);
++ if (vnic->tx_skb != NULL) {
++ dev_kfree_skb_any(vnic->tx_skb);
++ vnic->tx_skb = NULL;
++ if (netfront_check_queue_ready(net_dev)) {
++ netif_wake_queue(net_dev);
++ NETFRONT_ACCEL_STATS_OP
++ (vnic->stats.queue_wakes++);
++ }
++ }
++ spin_unlock_irqrestore(&np->tx_lock, flags2);
++ spin_unlock_irqrestore(&vnic->tx_lock, flags1);
++
++ /* Must prevent polls and hold lock to modify poll_enabled */
++ netif_poll_disable(net_dev);
++ spin_lock_irqsave(&vnic->irq_enabled_lock, flags1);
++ vnic->poll_enabled = 0;
++ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags1);
++ netif_poll_enable(net_dev);
++}
++
++
++static void netfront_accel_interface_up(netfront_accel_vnic *vnic)
++{
++
++ if (!vnic->backend_netdev_up) {
++ vnic->backend_netdev_up = 1;
++
++ if (vnic->frontend_ready)
++ vnic_start_fastpath(vnic);
++ }
++}
++
++
++static void netfront_accel_interface_down(netfront_accel_vnic *vnic)
++{
++
++ if (vnic->backend_netdev_up) {
++ vnic->backend_netdev_up = 0;
++
++ if (vnic->frontend_ready)
++ vnic_stop_fastpath(vnic);
++ }
++}
++
++
++static int vnic_add_bufs(netfront_accel_vnic *vnic,
++ struct net_accel_msg *msg)
++{
++ int rc, offset;
++ struct netfront_accel_bufinfo *bufinfo;
++
++ BUG_ON(msg->u.mapbufs.pages > NET_ACCEL_MSG_MAX_PAGE_REQ);
++
++ offset = msg->u.mapbufs.reqid;
++
++ if (offset < vnic->bufpages.max_pages -
++ (vnic->bufpages.max_pages / sfc_netfront_buffer_split)) {
++ bufinfo = vnic->rx_bufs;
++ } else
++ bufinfo = vnic->tx_bufs;
++
++ /* Queue up some Rx buffers to start things off. */
++ if ((rc = netfront_accel_add_bufs(&vnic->bufpages, bufinfo, msg)) == 0) {
++ netfront_accel_vi_add_bufs(vnic, bufinfo == vnic->rx_bufs);
++
++ if (offset + msg->u.mapbufs.pages == vnic->bufpages.max_pages) {
++ VPRINTK("%s: got all buffers back\n", __FUNCTION__);
++ vnic->frontend_ready = 1;
++ if (vnic->backend_netdev_up)
++ vnic_start_fastpath(vnic);
++ } else {
++ VPRINTK("%s: got buffers back %d %d\n", __FUNCTION__,
++ offset, msg->u.mapbufs.pages);
++ }
++ }
++
++ return rc;
++}
++
++
++/* The largest [o] such that (1u << o) <= n. Requires n > 0. */
++
++inline unsigned log2_le(unsigned long n) {
++ unsigned order = 1;
++ while ((1ul << order) <= n) ++order;
++ return (order - 1);
++}
++
++static int vnic_send_buffer_requests(netfront_accel_vnic *vnic,
++ struct netfront_accel_bufpages *bufpages)
++{
++ int pages, offset, rc = 0, sent = 0;
++ struct net_accel_msg msg;
++
++ while (bufpages->page_reqs < bufpages->max_pages) {
++ offset = bufpages->page_reqs;
++
++ pages = pow2(log2_le(bufpages->max_pages -
++ bufpages->page_reqs));
++ pages = pages < NET_ACCEL_MSG_MAX_PAGE_REQ ?
++ pages : NET_ACCEL_MSG_MAX_PAGE_REQ;
++
++ BUG_ON(offset < 0);
++ BUG_ON(pages <= 0);
++
++ rc = netfront_accel_buf_map_request(vnic->dev, bufpages,
++ &msg, pages, offset);
++ if (rc == 0) {
++ rc = net_accel_msg_send(vnic->shared_page,
++ &vnic->to_dom0, &msg);
++ if (rc < 0) {
++ VPRINTK("%s: queue full, stopping for now\n",
++ __FUNCTION__);
++ break;
++ }
++ sent++;
++ } else {
++ EPRINTK("%s: problem with grant, stopping for now\n",
++ __FUNCTION__);
++ break;
++ }
++
++ bufpages->page_reqs += pages;
++ }
++
++ if (sent)
++ net_accel_msg_notify(vnic->msg_channel_irq);
++
++ return rc;
++}
++
++
++/*
++ * In response to dom0 saying "my queue is full", we reply with this
++ * when it is no longer full
++ */
++inline void vnic_set_queue_not_full(netfront_accel_vnic *vnic)
++{
++
++ if (test_and_set_bit(NET_ACCEL_MSG_AFLAGS_QUEUE0NOTFULL_B,
++ (unsigned long *)&vnic->shared_page->aflags))
++ notify_remote_via_irq(vnic->msg_channel_irq);
++ else
++ VPRINTK("queue not full bit already set, not signalling\n");
++}
++
++/*
++ * Notify dom0 that the queue we want to use is full, it should
++ * respond by setting MSG_AFLAGS_QUEUEUNOTFULL in due course
++ */
++inline void vnic_set_queue_full(netfront_accel_vnic *vnic)
++{
++
++ if (!test_and_set_bit(NET_ACCEL_MSG_AFLAGS_QUEUEUFULL_B,
++ (unsigned long *)&vnic->shared_page->aflags))
++ notify_remote_via_irq(vnic->msg_channel_irq);
++ else
++ VPRINTK("queue full bit already set, not signalling\n");
++}
++
++
++static int vnic_check_hello_version(unsigned version)
++{
++ if (version > NET_ACCEL_MSG_VERSION) {
++ /* Newer protocol, we must refuse */
++ return -EPROTO;
++ }
++
++ if (version < NET_ACCEL_MSG_VERSION) {
++ /*
++ * We are newer, so have discretion to accept if we
++ * wish. For now however, just reject
++ */
++ return -EPROTO;
++ }
++
++ BUG_ON(version != NET_ACCEL_MSG_VERSION);
++ return 0;
++}
++
++
++static int vnic_process_hello_msg(netfront_accel_vnic *vnic,
++ struct net_accel_msg *msg)
++{
++ int err = 0;
++ unsigned pages = sfc_netfront_max_pages;
++
++ if (vnic_check_hello_version(msg->u.hello.version) < 0) {
++ msg->id = NET_ACCEL_MSG_HELLO | NET_ACCEL_MSG_REPLY
++ | NET_ACCEL_MSG_ERROR;
++ msg->u.hello.version = NET_ACCEL_MSG_VERSION;
++ } else {
++ vnic->backend_netdev_up
++ = vnic->shared_page->net_dev_up;
++
++ msg->id = NET_ACCEL_MSG_HELLO | NET_ACCEL_MSG_REPLY;
++ msg->u.hello.version = NET_ACCEL_MSG_VERSION;
++ if (msg->u.hello.max_pages &&
++ msg->u.hello.max_pages < pages)
++ pages = msg->u.hello.max_pages;
++ msg->u.hello.max_pages = pages;
++
++ /* Half of pages for rx, half for tx */
++ err = netfront_accel_alloc_buffer_mem(&vnic->bufpages,
++ vnic->rx_bufs,
++ vnic->tx_bufs,
++ pages);
++ if (err)
++ msg->id |= NET_ACCEL_MSG_ERROR;
++ }
++
++ /* Send reply */
++ net_accel_msg_reply_notify(vnic->shared_page, vnic->msg_channel_irq,
++ &vnic->to_dom0, msg);
++ return err;
++}
++
++
++static int vnic_process_localmac_msg(netfront_accel_vnic *vnic,
++ struct net_accel_msg *msg)
++{
++ unsigned long flags;
++ cuckoo_hash_mac_key key;
++
++ if (msg->u.localmac.flags & NET_ACCEL_MSG_ADD) {
++ DPRINTK("MAC has moved, could be local: " MAC_FMT "\n",
++ MAC_ARG(msg->u.localmac.mac));
++ key = cuckoo_mac_to_key(msg->u.localmac.mac);
++ spin_lock_irqsave(&vnic->table_lock, flags);
++ /* Try to remove it, not a big deal if not there */
++ cuckoo_hash_remove(&vnic->fastpath_table,
++ (cuckoo_hash_key *)&key);
++ spin_unlock_irqrestore(&vnic->table_lock, flags);
++ }
++
++ return 0;
++}
++
++
++static
++int vnic_process_rx_msg(netfront_accel_vnic *vnic,
++ struct net_accel_msg *msg)
++{
++ int err;
++
++ switch (msg->id) {
++ case NET_ACCEL_MSG_HELLO:
++ /* Hello, reply with Reply */
++ DPRINTK("got Hello, with version %.8x\n",
++ msg->u.hello.version);
++ BUG_ON(vnic->msg_state != NETFRONT_ACCEL_MSG_NONE);
++ err = vnic_process_hello_msg(vnic, msg);
++ if (err == 0)
++ vnic->msg_state = NETFRONT_ACCEL_MSG_HELLO;
++ break;
++ case NET_ACCEL_MSG_SETHW:
++ /* Hardware info message */
++ DPRINTK("got H/W info\n");
++ BUG_ON(vnic->msg_state != NETFRONT_ACCEL_MSG_HELLO);
++ err = netfront_accel_vi_init(vnic, &msg->u.hw);
++ if (err == 0)
++ vnic->msg_state = NETFRONT_ACCEL_MSG_HW;
++ break;
++ case NET_ACCEL_MSG_MAPBUF | NET_ACCEL_MSG_REPLY:
++ VPRINTK("Got mapped buffers back\n");
++ BUG_ON(vnic->msg_state != NETFRONT_ACCEL_MSG_HW);
++ err = vnic_add_bufs(vnic, msg);
++ break;
++ case NET_ACCEL_MSG_MAPBUF | NET_ACCEL_MSG_REPLY | NET_ACCEL_MSG_ERROR:
++ /* No buffers. Can't use the fast path. */
++ EPRINTK("Got mapped buffers error. Cannot accelerate.\n");
++ BUG_ON(vnic->msg_state != NETFRONT_ACCEL_MSG_HW);
++ err = -EIO;
++ break;
++ case NET_ACCEL_MSG_LOCALMAC:
++ /* Should be add, remove not currently used */
++ EPRINTK_ON(!(msg->u.localmac.flags & NET_ACCEL_MSG_ADD));
++ BUG_ON(vnic->msg_state != NETFRONT_ACCEL_MSG_HW);
++ err = vnic_process_localmac_msg(vnic, msg);
++ break;
++ default:
++ EPRINTK("Huh? Message code is 0x%x\n", msg->id);
++ err = -EPROTO;
++ break;
++ }
++
++ return err;
++}
++
++
++/* Process an IRQ received from back end driver */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++void netfront_accel_msg_from_bend(struct work_struct *context)
++#else
++void netfront_accel_msg_from_bend(void *context)
++#endif
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ netfront_accel_vnic *vnic =
++ container_of(context, netfront_accel_vnic, msg_from_bend);
++#else
++ netfront_accel_vnic *vnic = (netfront_accel_vnic *)context;
++#endif
++ struct net_accel_msg msg;
++ int err, queue_was_full = 0;
++
++ mutex_lock(&vnic->vnic_mutex);
++
++ /*
++ * This happens when the shared pages have been unmapped but
++ * the workqueue has yet to be flushed
++ */
++ if (!vnic->dom0_state_is_setup)
++ goto unlock_out;
++
++ while ((vnic->shared_page->aflags & NET_ACCEL_MSG_AFLAGS_TO_DOMU_MASK)
++ != 0) {
++ if (vnic->shared_page->aflags &
++ NET_ACCEL_MSG_AFLAGS_QUEUEUNOTFULL) {
++ /* We've been told there may now be space. */
++ clear_bit(NET_ACCEL_MSG_AFLAGS_QUEUEUNOTFULL_B,
++ (unsigned long *)&vnic->shared_page->aflags);
++ }
++
++ if (vnic->shared_page->aflags &
++ NET_ACCEL_MSG_AFLAGS_QUEUE0FULL) {
++ /*
++ * There will be space at the end of this
++ * function if we can make any.
++ */
++ clear_bit(NET_ACCEL_MSG_AFLAGS_QUEUE0FULL_B,
++ (unsigned long *)&vnic->shared_page->aflags);
++ queue_was_full = 1;
++ }
++
++ if (vnic->shared_page->aflags &
++ NET_ACCEL_MSG_AFLAGS_NETUPDOWN) {
++ DPRINTK("%s: net interface change\n", __FUNCTION__);
++ clear_bit(NET_ACCEL_MSG_AFLAGS_NETUPDOWN_B,
++ (unsigned long *)&vnic->shared_page->aflags);
++ if (vnic->shared_page->net_dev_up)
++ netfront_accel_interface_up(vnic);
++ else
++ netfront_accel_interface_down(vnic);
++ }
++ }
++
++ /* Pull msg out of shared memory */
++ while ((err = net_accel_msg_recv(vnic->shared_page, &vnic->from_dom0,
++ &msg)) == 0) {
++ err = vnic_process_rx_msg(vnic, &msg);
++
++ if (err != 0)
++ goto done;
++ }
++
++ /*
++ * Send any pending buffer map request messages that we can,
++ * and mark domU->dom0 as full if necessary.
++ */
++ if (vnic->msg_state == NETFRONT_ACCEL_MSG_HW &&
++ vnic->bufpages.page_reqs < vnic->bufpages.max_pages) {
++ if (vnic_send_buffer_requests(vnic, &vnic->bufpages) == -ENOSPC)
++ vnic_set_queue_full(vnic);
++ }
++
++ /*
++ * If there are no messages then this is not an error. It
++ * just means that we've finished processing the queue.
++ */
++ if (err == -ENOENT)
++ err = 0;
++ done:
++ /* We will now have made space in the dom0->domU queue if we can */
++ if (queue_was_full)
++ vnic_set_queue_not_full(vnic);
++
++ if (err != 0) {
++ EPRINTK("%s returned %d\n", __FUNCTION__, err);
++ netfront_accel_set_closing(vnic);
++ }
++
++ unlock_out:
++ mutex_unlock(&vnic->vnic_mutex);
++
++ return;
++}
++
++
++irqreturn_t netfront_accel_msg_channel_irq_from_bend(int irq, void *context,
++ struct pt_regs *unused)
++{
++ netfront_accel_vnic *vnic = (netfront_accel_vnic *)context;
++ VPRINTK("irq %d from device %s\n", irq, vnic->dev->nodename);
++
++ queue_work(netfront_accel_workqueue, &vnic->msg_from_bend);
++
++ return IRQ_HANDLED;
++}
++
++/* Process an interrupt received from the NIC via backend */
++irqreturn_t netfront_accel_net_channel_irq_from_bend(int irq, void *context,
++ struct pt_regs *unused)
++{
++ netfront_accel_vnic *vnic = (netfront_accel_vnic *)context;
++ struct net_device *net_dev = vnic->net_dev;
++ unsigned long flags;
++
++ VPRINTK("net irq %d from device %s\n", irq, vnic->dev->nodename);
++
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.irq_count++);
++
++ BUG_ON(net_dev==NULL);
++
++ spin_lock_irqsave(&vnic->irq_enabled_lock, flags);
++ if (vnic->irq_enabled) {
++ netfront_accel_disable_net_interrupts(vnic);
++ vnic->irq_enabled = 0;
++ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
++
++#if NETFRONT_ACCEL_STATS
++ vnic->stats.poll_schedule_count++;
++ if (vnic->stats.event_count_since_irq >
++ vnic->stats.events_per_irq_max)
++ vnic->stats.events_per_irq_max =
++ vnic->stats.event_count_since_irq;
++ vnic->stats.event_count_since_irq = 0;
++#endif
++ netif_rx_schedule(net_dev);
++ }
++ else {
++ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.useless_irq_count++);
++ DPRINTK("%s: irq when disabled\n", __FUNCTION__);
++ }
++
++ return IRQ_HANDLED;
++}
++
++
++void netfront_accel_msg_tx_fastpath(netfront_accel_vnic *vnic, const void *mac,
++ u32 ip, u16 port, u8 protocol)
++{
++ unsigned long lock_state;
++ struct net_accel_msg *msg;
++
++ msg = net_accel_msg_start_send(vnic->shared_page, &vnic->to_dom0,
++ &lock_state);
++
++ if (msg == NULL)
++ return;
++
++ net_accel_msg_init(msg, NET_ACCEL_MSG_FASTPATH);
++ msg->u.fastpath.flags = NET_ACCEL_MSG_REMOVE;
++ memcpy(msg->u.fastpath.mac, mac, ETH_ALEN);
++
++ msg->u.fastpath.port = port;
++ msg->u.fastpath.ip = ip;
++ msg->u.fastpath.proto = protocol;
++
++ net_accel_msg_complete_send_notify(vnic->shared_page, &vnic->to_dom0,
++ &lock_state, vnic->msg_channel_irq);
++}
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_netfront.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_netfront.c 2008-02-26 10:54:12.000000000 +0100
+@@ -0,0 +1,319 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/skbuff.h>
++#include <linux/netdevice.h>
++
++/* drivers/xen/netfront/netfront.h */
++#include "netfront.h"
++
++#include "accel.h"
++#include "accel_bufs.h"
++#include "accel_util.h"
++#include "accel_msg_iface.h"
++#include "accel_ssr.h"
++
++#ifdef EFX_GCOV
++#include "gcov.h"
++#endif
++
++#define NETFRONT_ACCEL_VNIC_FROM_NETDEV(_nd) \
++ ((netfront_accel_vnic *)((struct netfront_info *)netdev_priv(net_dev))->accel_priv)
++
++static int netfront_accel_netdev_start_xmit(struct sk_buff *skb,
++ struct net_device *net_dev)
++{
++ netfront_accel_vnic *vnic = NETFRONT_ACCEL_VNIC_FROM_NETDEV(net_dev);
++ struct netfront_info *np =
++ (struct netfront_info *)netdev_priv(net_dev);
++ int handled, rc;
++ unsigned long flags1, flags2;
++
++ BUG_ON(vnic == NULL);
++
++ /* Take our tx lock and hold for the duration */
++ spin_lock_irqsave(&vnic->tx_lock, flags1);
++
++ if (!vnic->tx_enabled) {
++ rc = 0;
++ goto unlock_out;
++ }
++
++ handled = netfront_accel_vi_tx_post(vnic, skb);
++ if (handled == NETFRONT_ACCEL_STATUS_BUSY) {
++ BUG_ON(vnic->net_dev != net_dev);
++ DPRINTK("%s stopping queue\n", __FUNCTION__);
++
++ /* Netfront's lock protects tx_skb */
++ spin_lock_irqsave(&np->tx_lock, flags2);
++ BUG_ON(vnic->tx_skb != NULL);
++ vnic->tx_skb = skb;
++ netif_stop_queue(net_dev);
++ spin_unlock_irqrestore(&np->tx_lock, flags2);
++
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.queue_stops++);
++ }
++
++ if (handled == NETFRONT_ACCEL_STATUS_CANT)
++ rc = 0;
++ else
++ rc = 1;
++
++unlock_out:
++ spin_unlock_irqrestore(&vnic->tx_lock, flags1);
++
++ return rc;
++}
++
++
++static int netfront_accel_netdev_poll(struct net_device *net_dev, int *budget)
++{
++ netfront_accel_vnic *vnic = NETFRONT_ACCEL_VNIC_FROM_NETDEV(net_dev);
++ int rx_allowed = *budget, rx_done;
++
++ BUG_ON(vnic == NULL);
++
++ /* Can check this without lock as modifier excludes polls */
++ if (!vnic->poll_enabled)
++ return 0;
++
++ rx_done = netfront_accel_vi_poll(vnic, rx_allowed);
++ *budget -= rx_done;
++
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.poll_call_count++);
++
++ VPRINTK("%s: done %d allowed %d\n",
++ __FUNCTION__, rx_done, rx_allowed);
++
++ netfront_accel_ssr_end_of_burst(vnic, &vnic->ssr_state);
++
++ if (rx_done < rx_allowed) {
++ return 0; /* Done */
++ }
++
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.poll_reschedule_count++);
++
++ return 1; /* More to do. */
++}
++
++
++/*
++ * Process request from netfront to start napi interrupt
++ * mode. (i.e. enable interrupts as it's finished polling)
++ */
++static int netfront_accel_start_napi_interrupts(struct net_device *net_dev)
++{
++ netfront_accel_vnic *vnic = NETFRONT_ACCEL_VNIC_FROM_NETDEV(net_dev);
++ unsigned long flags;
++
++ BUG_ON(vnic == NULL);
++
++ /*
++ * Can check this without lock as writer excludes poll before
++ * modifying
++ */
++ if (!vnic->poll_enabled)
++ return 0;
++
++ if (!netfront_accel_vi_enable_interrupts(vnic)) {
++ /*
++ * There was something there, tell caller we had
++ * something to do.
++ */
++ return 1;
++ }
++
++ spin_lock_irqsave(&vnic->irq_enabled_lock, flags);
++ vnic->irq_enabled = 1;
++ netfront_accel_enable_net_interrupts(vnic);
++ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
++
++ return 0;
++}
++
++
++/*
++ * Process request from netfront to stop napi interrupt
++ * mode. (i.e. disable interrupts as it's starting to poll
++ */
++static void netfront_accel_stop_napi_interrupts(struct net_device *net_dev)
++{
++ netfront_accel_vnic *vnic = NETFRONT_ACCEL_VNIC_FROM_NETDEV(net_dev);
++ unsigned long flags;
++
++ BUG_ON(vnic == NULL);
++
++ spin_lock_irqsave(&vnic->irq_enabled_lock, flags);
++
++ if (!vnic->poll_enabled) {
++ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
++ return;
++ }
++
++ netfront_accel_disable_net_interrupts(vnic);
++ vnic->irq_enabled = 0;
++ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
++}
++
++
++static int netfront_accel_check_ready(struct net_device *net_dev)
++{
++ netfront_accel_vnic *vnic = NETFRONT_ACCEL_VNIC_FROM_NETDEV(net_dev);
++
++ BUG_ON(vnic == NULL);
++
++ /* This is protected by netfront's lock */
++ return vnic->tx_skb == NULL;
++}
++
++
++static int netfront_accel_get_stats(struct net_device *net_dev,
++ struct net_device_stats *stats)
++{
++ netfront_accel_vnic *vnic = NETFRONT_ACCEL_VNIC_FROM_NETDEV(net_dev);
++ struct netfront_accel_netdev_stats now;
++
++ BUG_ON(vnic == NULL);
++
++ now.fastpath_rx_pkts = vnic->netdev_stats.fastpath_rx_pkts;
++ now.fastpath_rx_bytes = vnic->netdev_stats.fastpath_rx_bytes;
++ now.fastpath_rx_errors = vnic->netdev_stats.fastpath_rx_errors;
++ now.fastpath_tx_pkts = vnic->netdev_stats.fastpath_tx_pkts;
++ now.fastpath_tx_bytes = vnic->netdev_stats.fastpath_tx_bytes;
++ now.fastpath_tx_errors = vnic->netdev_stats.fastpath_tx_errors;
++
++ stats->rx_packets += (now.fastpath_rx_pkts -
++ vnic->stats_last_read.fastpath_rx_pkts);
++ stats->rx_bytes += (now.fastpath_rx_bytes -
++ vnic->stats_last_read.fastpath_rx_bytes);
++ stats->rx_errors += (now.fastpath_rx_errors -
++ vnic->stats_last_read.fastpath_rx_errors);
++ stats->tx_packets += (now.fastpath_tx_pkts -
++ vnic->stats_last_read.fastpath_tx_pkts);
++ stats->tx_bytes += (now.fastpath_tx_bytes -
++ vnic->stats_last_read.fastpath_tx_bytes);
++ stats->tx_errors += (now.fastpath_tx_errors -
++ vnic->stats_last_read.fastpath_tx_errors);
++
++ vnic->stats_last_read = now;
++
++ return 0;
++}
++
++
++struct netfront_accel_hooks accel_hooks = {
++ .new_device = &netfront_accel_probe,
++ .remove = &netfront_accel_remove,
++ .netdev_poll = &netfront_accel_netdev_poll,
++ .start_xmit = &netfront_accel_netdev_start_xmit,
++ .start_napi_irq = &netfront_accel_start_napi_interrupts,
++ .stop_napi_irq = &netfront_accel_stop_napi_interrupts,
++ .check_ready = &netfront_accel_check_ready,
++ .get_stats = &netfront_accel_get_stats
++};
++
++
++unsigned sfc_netfront_max_pages = NETFRONT_ACCEL_DEFAULT_BUF_PAGES;
++module_param_named (max_pages, sfc_netfront_max_pages, uint, 0644);
++MODULE_PARM_DESC(max_pages, "Number of buffer pages to request");
++
++unsigned sfc_netfront_buffer_split = 2;
++module_param_named (buffer_split, sfc_netfront_buffer_split, uint, 0644);
++MODULE_PARM_DESC(buffer_split,
++ "Fraction of buffers to use for TX, rest for RX");
++
++
++const char *frontend_name = "sfc_netfront";
++
++struct workqueue_struct *netfront_accel_workqueue;
++
++static int __init netfront_accel_init(void)
++{
++ int rc;
++#ifdef EFX_GCOV
++ gcov_provider_init(THIS_MODULE);
++#endif
++
++ /*
++ * If we're running on dom0, netfront hasn't initialised
++ * itself, so we need to keep away
++ */
++ if (is_initial_xendomain())
++ return 0;
++
++ if (!is_pow2(sizeof(struct net_accel_msg)))
++ EPRINTK("%s: bad structure size\n", __FUNCTION__);
++
++ netfront_accel_workqueue = create_workqueue(frontend_name);
++
++ netfront_accel_debugfs_init();
++
++ rc = netfront_accelerator_loaded(NETFRONT_ACCEL_VERSION,
++ frontend_name, &accel_hooks);
++
++ if (rc < 0) {
++ EPRINTK("Xen netfront accelerator version mismatch\n");
++ return -EINVAL;
++ }
++
++ if (rc > 0) {
++ /*
++ * In future may want to add backwards compatibility
++ * and accept certain subsets of previous versions
++ */
++ EPRINTK("Xen netfront accelerator version mismatch\n");
++ return -EINVAL;
++ }
++
++ return 0;
++}
++module_init(netfront_accel_init);
++
++static void __exit netfront_accel_exit(void)
++{
++ if (is_initial_xendomain())
++ return;
++
++ DPRINTK("%s: unhooking\n", __FUNCTION__);
++
++ /* Unhook from normal netfront */
++ netfront_accelerator_stop(frontend_name);
++
++ DPRINTK("%s: done\n", __FUNCTION__);
++
++ netfront_accel_debugfs_fini();
++
++ flush_workqueue(netfront_accel_workqueue);
++
++ destroy_workqueue(netfront_accel_workqueue);
++
++#ifdef EFX_GCOV
++ gcov_provider_fini(THIS_MODULE);
++#endif
++ return;
++}
++module_exit(netfront_accel_exit);
++
++MODULE_LICENSE("GPL");
++
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_ssr.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_ssr.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,308 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/socket.h>
++#include <linux/in.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <linux/list.h>
++#include <net/ip.h>
++#include <net/checksum.h>
++
++#include "accel.h"
++#include "accel_util.h"
++#include "accel_bufs.h"
++
++#include "accel_ssr.h"
++
++static inline int list_valid(struct list_head *lh) {
++ return(lh->next != NULL);
++}
++
++static void netfront_accel_ssr_deliver (struct netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st,
++ struct netfront_accel_ssr_conn *c);
++
++/** Construct an efx_ssr_state.
++ *
++ * @v st The SSR state (per channel per port)
++ * @v port The port.
++ */
++void netfront_accel_ssr_init(struct netfront_accel_ssr_state *st) {
++ unsigned i;
++
++ INIT_LIST_HEAD(&st->conns);
++ INIT_LIST_HEAD(&st->free_conns);
++ for (i = 0; i < 8; ++i) {
++ struct netfront_accel_ssr_conn *c =
++ kmalloc(sizeof(*c), GFP_KERNEL);
++ if (c == NULL) break;
++ c->n_in_order_pkts = 0;
++ c->skb = NULL;
++ list_add(&c->link, &st->free_conns);
++ }
++
++}
++
++
++/** Destructor for an efx_ssr_state.
++ *
++ * @v st The SSR state (per channel per port)
++ */
++void netfront_accel_ssr_fini(netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st) {
++ struct netfront_accel_ssr_conn *c;
++
++ /* Return cleanly if efx_ssr_init() not previously called */
++ BUG_ON(list_valid(&st->conns) != list_valid(&st->free_conns));
++ if (! list_valid(&st->conns))
++ return;
++
++ while ( ! list_empty(&st->free_conns)) {
++ c = list_entry(st->free_conns.prev,
++ struct netfront_accel_ssr_conn, link);
++ list_del(&c->link);
++ BUG_ON(c->skb != NULL);
++ kfree(c);
++ }
++ while ( ! list_empty(&st->conns)) {
++ c = list_entry(st->conns.prev,
++ struct netfront_accel_ssr_conn, link);
++ list_del(&c->link);
++ if (c->skb)
++ netfront_accel_ssr_deliver(vnic, st, c);
++ kfree(c);
++ }
++}
++
++
++/** Calc IP checksum and deliver to the OS
++ *
++ * @v st The SSR state (per channel per port)
++ * @v c The SSR connection state
++ */
++static void netfront_accel_ssr_deliver(netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st,
++ struct netfront_accel_ssr_conn *c) {
++ BUG_ON(c->skb == NULL);
++
++ /*
++ * If we've chained packets together, recalculate the IP
++ * checksum.
++ */
++ if (skb_shinfo(c->skb)->frag_list) {
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.ssr_bursts);
++ c->iph->check = 0;
++ c->iph->check = ip_fast_csum((unsigned char *) c->iph,
++ c->iph->ihl);
++ }
++
++ VPRINTK("%s: %d\n", __FUNCTION__, c->skb->len);
++
++ netif_receive_skb(c->skb);
++ c->skb = NULL;
++}
++
++
++/** Push held skbs down into network stack.
++ *
++ * @v st SSR state
++ *
++ * Only called if we are tracking one or more connections.
++ */
++void __netfront_accel_ssr_end_of_burst(netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st) {
++ struct netfront_accel_ssr_conn *c;
++
++ BUG_ON(list_empty(&st->conns));
++
++ list_for_each_entry(c, &st->conns, link)
++ if (c->skb)
++ netfront_accel_ssr_deliver(vnic, st, c);
++
++ /* Time-out connections that have received no traffic for 20ms. */
++ c = list_entry(st->conns.prev, struct netfront_accel_ssr_conn,
++ link);
++ if (jiffies - c->last_pkt_jiffies > (HZ / 50 + 1)) {
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.ssr_drop_stream);
++ list_del(&c->link);
++ list_add(&c->link, &st->free_conns);
++ }
++}
++
++
++/** Process SKB and decide whether to dispatch it to the stack now or
++ * later.
++ *
++ * @v st SSR state
++ * @v skb SKB to exmaine
++ * @ret rc 0 => deliver SKB to kernel now, otherwise the SKB belongs
++ * us.
++ */
++int netfront_accel_ssr_skb(struct netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st,
++ struct sk_buff *skb) {
++ int data_length, dont_merge;
++ struct netfront_accel_ssr_conn *c;
++ struct iphdr *iph;
++ struct tcphdr *th;
++ unsigned th_seq;
++
++ BUG_ON(skb_shinfo(skb)->frag_list != NULL);
++ BUG_ON(skb->next != NULL);
++
++ /* We're not interested if it isn't TCP over IPv4. */
++ iph = (struct iphdr *) skb->data;
++ if (skb->protocol != htons(ETH_P_IP) ||
++ iph->protocol != IPPROTO_TCP) {
++ return 0;
++ }
++
++ /* Ignore segments that fail csum or are fragmented. */
++ if (unlikely((skb->ip_summed - CHECKSUM_UNNECESSARY) |
++ (iph->frag_off & htons(IP_MF | IP_OFFSET)))) {
++ return 0;
++ }
++
++ th = (struct tcphdr*)(skb->data + iph->ihl * 4);
++ data_length = ntohs(iph->tot_len) - iph->ihl * 4 - th->doff * 4;
++ th_seq = ntohl(th->seq);
++ dont_merge = (data_length == 0) | th->urg | th->syn | th->rst;
++
++ list_for_each_entry(c, &st->conns, link) {
++ if ((c->saddr - iph->saddr) |
++ (c->daddr - iph->daddr) |
++ (c->source - th->source) |
++ (c->dest - th->dest ))
++ continue;
++
++ /* Re-insert at head of list to reduce lookup time. */
++ list_del(&c->link);
++ list_add(&c->link, &st->conns);
++ c->last_pkt_jiffies = jiffies;
++
++ if (unlikely(th_seq - c->next_seq)) {
++ /* Out-of-order, so start counting again. */
++ if (c->skb)
++ netfront_accel_ssr_deliver(vnic, st, c);
++ c->n_in_order_pkts = 0;
++ c->next_seq = th_seq + data_length;
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.ssr_misorder);
++ return 0;
++ }
++ c->next_seq = th_seq + data_length;
++
++ if (++c->n_in_order_pkts < 300) {
++ /* May be in slow-start, so don't merge. */
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.ssr_slow_start);
++ return 0;
++ }
++
++ if (unlikely(dont_merge)) {
++ if (c->skb)
++ netfront_accel_ssr_deliver(vnic, st, c);
++ return 0;
++ }
++
++ if (c->skb) {
++ c->iph->tot_len = ntohs(c->iph->tot_len);
++ c->iph->tot_len += data_length;
++ c->iph->tot_len = htons(c->iph->tot_len);
++ c->th->ack_seq = th->ack_seq;
++ c->th->fin |= th->fin;
++ c->th->psh |= th->psh;
++ c->th->window = th->window;
++
++ /* Remove the headers from this skb. */
++ skb_pull(skb, skb->len - data_length);
++
++ /*
++ * Tack the new skb onto the head skb's frag_list.
++ * This is exactly the format that fragmented IP
++ * datagrams are reassembled into.
++ */
++ BUG_ON(skb->next != 0);
++ if ( ! skb_shinfo(c->skb)->frag_list)
++ skb_shinfo(c->skb)->frag_list = skb;
++ else
++ c->skb_tail->next = skb;
++ c->skb_tail = skb;
++ c->skb->len += skb->len;
++ c->skb->data_len += skb->len;
++ c->skb->truesize += skb->truesize;
++
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.ssr_merges);
++
++ /*
++ * If the next packet might push this super-packet
++ * over the limit for an IP packet, deliver it now.
++ * This is slightly conservative, but close enough.
++ */
++ if (c->skb->len +
++ (PAGE_SIZE / NETFRONT_ACCEL_BUFS_PER_PAGE)
++ > 16384)
++ netfront_accel_ssr_deliver(vnic, st, c);
++
++ return 1;
++ }
++ else {
++ c->iph = iph;
++ c->th = th;
++ c->skb = skb;
++ return 1;
++ }
++ }
++
++ /* We're not yet tracking this connection. */
++
++ if (dont_merge) {
++ return 0;
++ }
++
++ if (list_empty(&st->free_conns)) {
++ c = list_entry(st->conns.prev,
++ struct netfront_accel_ssr_conn,
++ link);
++ if (c->skb) {
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.ssr_too_many);
++ return 0;
++ }
++ }
++ else {
++ c = list_entry(st->free_conns.next,
++ struct netfront_accel_ssr_conn,
++ link);
++ }
++ list_del(&c->link);
++ list_add(&c->link, &st->conns);
++ c->saddr = iph->saddr;
++ c->daddr = iph->daddr;
++ c->source = th->source;
++ c->dest = th->dest;
++ c->next_seq = th_seq + data_length;
++ c->n_in_order_pkts = 0;
++ BUG_ON(c->skb != NULL);
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.ssr_new_stream);
++ return 0;
++}
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_ssr.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_ssr.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,88 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NETFRONT_ACCEL_SSR_H
++#define NETFRONT_ACCEL_SSR_H
++
++#include <linux/skbuff.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <linux/list.h>
++
++#include "accel.h"
++
++/** State for Soft Segment Reassembly (SSR). */
++
++struct netfront_accel_ssr_conn {
++ struct list_head link;
++
++ unsigned saddr, daddr;
++ unsigned short source, dest;
++
++ /** Number of in-order packets we've seen with payload. */
++ unsigned n_in_order_pkts;
++
++ /** Next in-order sequence number. */
++ unsigned next_seq;
++
++ /** Time we last saw a packet on this connection. */
++ unsigned long last_pkt_jiffies;
++
++ /** The SKB we are currently holding. If NULL, then all following
++ * fields are undefined.
++ */
++ struct sk_buff *skb;
++
++ /** The tail of the frag_list of SKBs we're holding. Only valid
++ * after at least one merge.
++ */
++ struct sk_buff *skb_tail;
++
++ /** The IP header of the skb we are holding. */
++ struct iphdr *iph;
++
++ /** The TCP header of the skb we are holding. */
++ struct tcphdr *th;
++};
++
++extern void netfront_accel_ssr_init(struct netfront_accel_ssr_state *st);
++extern void netfront_accel_ssr_fini(netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st);
++
++extern void
++__netfront_accel_ssr_end_of_burst(netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st);
++
++extern int netfront_accel_ssr_skb(netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st,
++ struct sk_buff *skb);
++
++static inline void
++netfront_accel_ssr_end_of_burst (netfront_accel_vnic *vnic,
++ struct netfront_accel_ssr_state *st) {
++ if ( ! list_empty(&st->conns) )
++ __netfront_accel_ssr_end_of_burst(vnic, st);
++}
++
++#endif /* NETFRONT_ACCEL_SSR_H */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_tso.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_tso.c 2008-02-26 10:54:12.000000000 +0100
+@@ -0,0 +1,511 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/pci.h>
++#include <linux/tcp.h>
++#include <linux/ip.h>
++#include <linux/in.h>
++#include <linux/if_ether.h>
++
++#include "accel.h"
++#include "accel_util.h"
++
++#include "accel_tso.h"
++
++#define PTR_DIFF(p1, p2) ((u8*)(p1) - (u8*)(p2))
++#define ETH_HDR_LEN(skb) ((skb)->nh.raw - (skb)->data)
++#define SKB_TCP_OFF(skb) PTR_DIFF ((skb)->h.th, (skb)->data)
++#define SKB_IP_OFF(skb) PTR_DIFF ((skb)->nh.iph, (skb)->data)
++
++/*
++ * Set a maximum number of buffers in each output packet to make life
++ * a little simpler - if this is reached it will just move on to
++ * another packet
++ */
++#define ACCEL_TSO_MAX_BUFFERS (6)
++
++/** TSO State.
++ *
++ * The state used during segmentation. It is put into this data structure
++ * just to make it easy to pass into inline functions.
++ */
++struct netfront_accel_tso_state {
++ /** bytes of data we've yet to segment */
++ unsigned remaining_len;
++
++ /** current sequence number */
++ unsigned seqnum;
++
++ /** remaining space in current packet */
++ unsigned packet_space;
++
++ /** List of packets to be output, containing the buffers and
++ * iovecs to describe each packet
++ */
++ struct netfront_accel_tso_output_packet *output_packets;
++
++ /** Total number of buffers in output_packets */
++ unsigned buffers;
++
++ /** Total number of packets in output_packets */
++ unsigned packets;
++
++ /** Input Fragment Cursor.
++ *
++ * Where we are in the current fragment of the incoming SKB. These
++ * values get updated in place when we split a fragment over
++ * multiple packets.
++ */
++ struct {
++ /** address of current position */
++ void *addr;
++ /** remaining length */
++ unsigned int len;
++ } ifc; /* == ifc Input Fragment Cursor */
++
++ /** Parameters.
++ *
++ * These values are set once at the start of the TSO send and do
++ * not get changed as the routine progresses.
++ */
++ struct {
++ /* the number of bytes of header */
++ unsigned int header_length;
++
++ /* The number of bytes to put in each outgoing segment. */
++ int full_packet_size;
++
++ /* Current IP ID, host endian. */
++ unsigned ip_id;
++
++ /* Max size of each output packet payload */
++ int gso_size;
++ } p;
++};
++
++
++/**
++ * Verify that our various assumptions about sk_buffs and the conditions
++ * under which TSO will be attempted hold true.
++ *
++ * @v skb The sk_buff to check.
++ */
++static inline void tso_check_safe(struct sk_buff *skb) {
++ EPRINTK_ON(skb->protocol != htons (ETH_P_IP));
++ EPRINTK_ON(((struct ethhdr*) skb->data)->h_proto != htons (ETH_P_IP));
++ EPRINTK_ON(skb->nh.iph->protocol != IPPROTO_TCP);
++ EPRINTK_ON((SKB_TCP_OFF(skb)
++ + (skb->h.th->doff << 2u)) > skb_headlen(skb));
++}
++
++
++
++/** Parse the SKB header and initialise state. */
++static inline void tso_start(struct netfront_accel_tso_state *st,
++ struct sk_buff *skb) {
++
++ /*
++ * All ethernet/IP/TCP headers combined size is TCP header size
++ * plus offset of TCP header relative to start of packet.
++ */
++ st->p.header_length = (skb->h.th->doff << 2u) + SKB_TCP_OFF(skb);
++ st->p.full_packet_size = (st->p.header_length
++ + skb_shinfo(skb)->gso_size);
++ st->p.gso_size = skb_shinfo(skb)->gso_size;
++
++ st->p.ip_id = htons(skb->nh.iph->id);
++ st->seqnum = ntohl(skb->h.th->seq);
++
++ EPRINTK_ON(skb->h.th->urg);
++ EPRINTK_ON(skb->h.th->syn);
++ EPRINTK_ON(skb->h.th->rst);
++
++ st->remaining_len = skb->len - st->p.header_length;
++
++ st->output_packets = NULL;
++ st->buffers = 0;
++ st->packets = 0;
++
++ VPRINTK("Starting new TSO: hl %d ps %d gso %d seq %x len %d\n",
++ st->p.header_length, st->p.full_packet_size, st->p.gso_size,
++ st->seqnum, skb->len);
++}
++
++/**
++ * Add another NIC mapped buffer onto an output packet
++ */
++static inline int tso_start_new_buffer(netfront_accel_vnic *vnic,
++ struct netfront_accel_tso_state *st,
++ int first)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++ struct netfront_accel_pkt_desc *buf;
++
++ /* Get a mapped packet buffer */
++ buf = netfront_accel_buf_get(vnic->tx_bufs);
++ if (buf == NULL) {
++ DPRINTK("%s: No buffer for TX\n", __FUNCTION__);
++ return -1;
++ }
++
++ /* Store a bit of meta-data at the end */
++ tso_buf =(struct netfront_accel_tso_buffer *)
++ (buf->pkt_kva + NETFRONT_ACCEL_TSO_BUF_LENGTH
++ + sizeof(struct netfront_accel_tso_output_packet));
++
++ tso_buf->buf = buf;
++
++ tso_buf->length = 0;
++
++ if (first) {
++ struct netfront_accel_tso_output_packet *output_packet
++ = (struct netfront_accel_tso_output_packet *)
++ (buf->pkt_kva + NETFRONT_ACCEL_TSO_BUF_LENGTH);
++ output_packet->next = st->output_packets;
++ st->output_packets = output_packet;
++ tso_buf->next = NULL;
++ st->output_packets->tso_bufs = tso_buf;
++ st->output_packets->tso_bufs_len = 1;
++ } else {
++ tso_buf->next = st->output_packets->tso_bufs;
++ st->output_packets->tso_bufs = tso_buf;
++ st->output_packets->tso_bufs_len ++;
++ }
++
++ BUG_ON(st->output_packets->tso_bufs_len > ACCEL_TSO_MAX_BUFFERS);
++
++ st->buffers ++;
++
++ /*
++ * Store the context, set to NULL, last packet buffer will get
++ * non-NULL later
++ */
++ tso_buf->buf->skb = NULL;
++
++ return 0;
++}
++
++
++/* Generate a new header, and prepare for the new packet.
++ *
++ * @v vnic VNIC
++ * @v skb Socket buffer
++ * @v st TSO state
++ * @ret rc 0 on success, or -1 if failed to alloc header
++ */
++
++static inline
++int tso_start_new_packet(netfront_accel_vnic *vnic,
++ struct sk_buff *skb,
++ struct netfront_accel_tso_state *st)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++ struct iphdr *tsoh_iph;
++ struct tcphdr *tsoh_th;
++ unsigned ip_length;
++
++ if (tso_start_new_buffer(vnic, st, 1) < 0) {
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.fastpath_tx_busy++);
++ return -1;
++ }
++
++ /* This has been set up by tso_start_new_buffer() */
++ tso_buf = st->output_packets->tso_bufs;
++
++ /* Copy in the header */
++ memcpy(tso_buf->buf->pkt_kva, skb->data, st->p.header_length);
++ tso_buf->length = st->p.header_length;
++
++ tsoh_th = (struct tcphdr*)
++ (tso_buf->buf->pkt_kva + SKB_TCP_OFF(skb));
++ tsoh_iph = (struct iphdr*)
++ (tso_buf->buf->pkt_kva + SKB_IP_OFF(skb));
++
++ /* Set to zero to encourage falcon to fill these in */
++ tsoh_th->check = 0;
++ tsoh_iph->check = 0;
++
++ tsoh_th->seq = htonl(st->seqnum);
++ st->seqnum += st->p.gso_size;
++
++ if (st->remaining_len > st->p.gso_size) {
++ /* This packet will not finish the TSO burst. */
++ ip_length = st->p.full_packet_size - ETH_HDR_LEN(skb);
++ tsoh_th->fin = 0;
++ tsoh_th->psh = 0;
++ } else {
++ /* This packet will be the last in the TSO burst. */
++ ip_length = (st->p.header_length - ETH_HDR_LEN(skb)
++ + st->remaining_len);
++ tsoh_th->fin = skb->h.th->fin;
++ tsoh_th->psh = skb->h.th->psh;
++ }
++
++ tsoh_iph->tot_len = htons(ip_length);
++
++ /* Linux leaves suitable gaps in the IP ID space for us to fill. */
++ tsoh_iph->id = st->p.ip_id++;
++ tsoh_iph->id = htons(tsoh_iph->id);
++
++ st->packet_space = st->p.gso_size;
++
++ st->packets++;
++
++ return 0;
++}
++
++
++
++static inline void tso_get_fragment(struct netfront_accel_tso_state *st,
++ int len, void *addr)
++{
++ st->ifc.len = len;
++ st->ifc.addr = addr;
++ return;
++}
++
++
++static inline void tso_unwind(netfront_accel_vnic *vnic,
++ struct netfront_accel_tso_state *st)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++ struct netfront_accel_tso_output_packet *output_packet;
++
++ DPRINTK("%s\n", __FUNCTION__);
++
++ while (st->output_packets != NULL) {
++ output_packet = st->output_packets;
++ st->output_packets = output_packet->next;
++ while (output_packet->tso_bufs != NULL) {
++ tso_buf = output_packet->tso_bufs;
++ output_packet->tso_bufs = tso_buf->next;
++
++ st->buffers --;
++ output_packet->tso_bufs_len --;
++
++ netfront_accel_buf_put(vnic->tx_bufs,
++ tso_buf->buf->buf_id);
++ }
++ }
++ BUG_ON(st->buffers != 0);
++}
++
++
++
++static inline
++void tso_fill_packet_with_fragment(netfront_accel_vnic *vnic,
++ struct netfront_accel_tso_state *st)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++ int n, space;
++
++ BUG_ON(st->output_packets == NULL);
++ BUG_ON(st->output_packets->tso_bufs == NULL);
++
++ tso_buf = st->output_packets->tso_bufs;
++
++ if (st->ifc.len == 0) return;
++ if (st->packet_space == 0) return;
++ if (tso_buf->length == NETFRONT_ACCEL_TSO_BUF_LENGTH) return;
++
++ n = min(st->ifc.len, st->packet_space);
++
++ space = NETFRONT_ACCEL_TSO_BUF_LENGTH - tso_buf->length;
++ n = min(n, space);
++
++ st->packet_space -= n;
++ st->remaining_len -= n;
++ st->ifc.len -= n;
++
++ memcpy(tso_buf->buf->pkt_kva + tso_buf->length, st->ifc.addr, n);
++
++ tso_buf->length += n;
++
++ BUG_ON(tso_buf->length > NETFRONT_ACCEL_TSO_BUF_LENGTH);
++
++ st->ifc.addr += n;
++
++ return;
++}
++
++
++int netfront_accel_enqueue_skb_tso(netfront_accel_vnic *vnic,
++ struct sk_buff *skb)
++{
++ struct netfront_accel_tso_state state;
++ struct netfront_accel_tso_buffer *tso_buf = NULL;
++ struct netfront_accel_tso_output_packet *reversed_list = NULL;
++ struct netfront_accel_tso_output_packet *tmp_pkt;
++ ef_iovec iovecs[ACCEL_TSO_MAX_BUFFERS];
++ int frag_i, rc, dma_id;
++ skb_frag_t *f;
++
++ tso_check_safe(skb);
++
++ if (skb->ip_summed != CHECKSUM_HW)
++ EPRINTK("Trying to TSO send a packet without HW checksum\n");
++
++ tso_start(&state, skb);
++
++ /*
++ * Setup the first payload fragment. If the skb header area
++ * contains exactly the headers and all payload is in the frag
++ * list things are little simpler
++ */
++ if (skb_headlen(skb) == state.p.header_length) {
++ /* Grab the first payload fragment. */
++ BUG_ON(skb_shinfo(skb)->nr_frags < 1);
++ frag_i = 0;
++ f = &skb_shinfo(skb)->frags[frag_i];
++ tso_get_fragment(&state, f->size,
++ page_address(f->page) + f->page_offset);
++ } else {
++ int hl = state.p.header_length;
++ tso_get_fragment(&state, skb_headlen(skb) - hl,
++ skb->data + hl);
++ frag_i = -1;
++ }
++
++ if (tso_start_new_packet(vnic, skb, &state) < 0) {
++ DPRINTK("%s: out of first start-packet memory\n",
++ __FUNCTION__);
++ goto unwind;
++ }
++
++ while (1) {
++ tso_fill_packet_with_fragment(vnic, &state);
++
++ /* Move onto the next fragment? */
++ if (state.ifc.len == 0) {
++ if (++frag_i >= skb_shinfo(skb)->nr_frags)
++ /* End of payload reached. */
++ break;
++ f = &skb_shinfo(skb)->frags[frag_i];
++ tso_get_fragment(&state, f->size,
++ page_address(f->page) +
++ f->page_offset);
++ }
++
++ /* Start a new buffer? */
++ if ((state.output_packets->tso_bufs->length ==
++ NETFRONT_ACCEL_TSO_BUF_LENGTH) &&
++ tso_start_new_buffer(vnic, &state, 0)) {
++ DPRINTK("%s: out of start-buffer memory\n",
++ __FUNCTION__);
++ goto unwind;
++ }
++
++ /* Start at new packet? */
++ if ((state.packet_space == 0 ||
++ ((state.output_packets->tso_bufs_len >=
++ ACCEL_TSO_MAX_BUFFERS) &&
++ (state.output_packets->tso_bufs->length >=
++ NETFRONT_ACCEL_TSO_BUF_LENGTH))) &&
++ tso_start_new_packet(vnic, skb, &state) < 0) {
++ DPRINTK("%s: out of start-packet memory\n",
++ __FUNCTION__);
++ goto unwind;
++ }
++
++ }
++
++ /* Check for space */
++ if (ef_vi_transmit_space(&vnic->vi) < state.buffers) {
++ DPRINTK("%s: Not enough TX space (%d)\n",
++ __FUNCTION__, state.buffers);
++ goto unwind;
++ }
++
++ /*
++ * Store the skb context in the most recent buffer (i.e. the
++ * last buffer that will be sent)
++ */
++ state.output_packets->tso_bufs->buf->skb = skb;
++
++ /* Reverse the list of packets as we construct it on a stack */
++ while (state.output_packets != NULL) {
++ tmp_pkt = state.output_packets;
++ state.output_packets = tmp_pkt->next;
++ tmp_pkt->next = reversed_list;
++ reversed_list = tmp_pkt;
++ }
++
++ /* Pass off to hardware */
++ while (reversed_list != NULL) {
++ tmp_pkt = reversed_list;
++ reversed_list = tmp_pkt->next;
++
++ BUG_ON(tmp_pkt->tso_bufs_len > ACCEL_TSO_MAX_BUFFERS);
++ BUG_ON(tmp_pkt->tso_bufs_len == 0);
++
++ dma_id = tmp_pkt->tso_bufs->buf->buf_id;
++
++ /*
++ * Make an iovec of the buffers in the list, reversing
++ * the buffers as we go as they are constructed on a
++ * stack
++ */
++ tso_buf = tmp_pkt->tso_bufs;
++ for (frag_i = tmp_pkt->tso_bufs_len - 1;
++ frag_i >= 0;
++ frag_i--) {
++ iovecs[frag_i].iov_base = tso_buf->buf->pkt_buff_addr;
++ iovecs[frag_i].iov_len = tso_buf->length;
++ tso_buf = tso_buf->next;
++ }
++
++ rc = ef_vi_transmitv(&vnic->vi, iovecs, tmp_pkt->tso_bufs_len,
++ dma_id);
++ /*
++ * We checked for space already, so it really should
++ * succeed
++ */
++ BUG_ON(rc != 0);
++ }
++
++ /* Track number of tx fastpath stats */
++ vnic->netdev_stats.fastpath_tx_bytes += skb->len;
++ vnic->netdev_stats.fastpath_tx_pkts += state.packets;
++#if NETFRONT_ACCEL_STATS
++ {
++ unsigned n;
++ n = vnic->netdev_stats.fastpath_tx_pkts -
++ vnic->stats.fastpath_tx_completions;
++ if (n > vnic->stats.fastpath_tx_pending_max)
++ vnic->stats.fastpath_tx_pending_max = n;
++ }
++#endif
++
++ return NETFRONT_ACCEL_STATUS_GOOD;
++
++ unwind:
++ tso_unwind(vnic, &state);
++
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.fastpath_tx_busy++);
++
++ return NETFRONT_ACCEL_STATUS_BUSY;
++}
++
++
++
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_tso.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_tso.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,57 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NETFRONT_ACCEL_TSO_H
++#define NETFRONT_ACCEL_TSO_H
++
++#include "accel_bufs.h"
++
++/* Track the buffers used in each output packet */
++struct netfront_accel_tso_buffer {
++ struct netfront_accel_tso_buffer *next;
++ struct netfront_accel_pkt_desc *buf;
++ unsigned length;
++};
++
++/* Track the output packets formed from each input packet */
++struct netfront_accel_tso_output_packet {
++ struct netfront_accel_tso_output_packet *next;
++ struct netfront_accel_tso_buffer *tso_bufs;
++ unsigned tso_bufs_len;
++};
++
++
++/*
++ * Max available space in a buffer for data once meta-data has taken
++ * its place
++ */
++#define NETFRONT_ACCEL_TSO_BUF_LENGTH \
++ ((PAGE_SIZE / NETFRONT_ACCEL_BUFS_PER_PAGE) \
++ - sizeof(struct netfront_accel_tso_buffer) \
++ - sizeof(struct netfront_accel_tso_output_packet))
++
++int netfront_accel_enqueue_skb_tso(netfront_accel_vnic *vnic,
++ struct sk_buff *skb);
++
++#endif /* NETFRONT_ACCEL_TSO_H */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_vi.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_vi.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,1194 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/if_ether.h>
++#include <linux/ip.h>
++#include <net/checksum.h>
++#include <asm/io.h>
++
++#include "accel.h"
++#include "accel_util.h"
++#include "accel_bufs.h"
++#include "accel_tso.h"
++#include "accel_ssr.h"
++#include "netfront.h"
++
++#include "etherfabric/ef_vi.h"
++
++/*
++ * Max available space in a buffer for data once meta-data has taken
++ * its place
++ */
++#define NETFRONT_ACCEL_TX_BUF_LENGTH \
++ ((PAGE_SIZE / NETFRONT_ACCEL_BUFS_PER_PAGE) \
++ - sizeof(struct netfront_accel_tso_buffer))
++
++#define ACCEL_TX_MAX_BUFFERS (6)
++#define ACCEL_VI_POLL_EVENTS (8)
++
++static
++int netfront_accel_vi_init_fini(netfront_accel_vnic *vnic,
++ struct net_accel_msg_hw *hw_msg)
++{
++ struct ef_vi_nic_type nic_type;
++ struct net_accel_hw_falcon_b *hw_info;
++ void *io_kva, *evq_base, *rx_dma_kva, *tx_dma_kva, *doorbell_kva;
++ u32 *evq_gnts;
++ u32 evq_order;
++ int vi_state_size;
++ u8 vi_data[VI_MAPPINGS_SIZE];
++
++ if (hw_msg == NULL)
++ goto fini;
++
++ /* And create the local macs table lock */
++ spin_lock_init(&vnic->table_lock);
++
++ /* Create fastpath table, initial size 8, key length 8 */
++ if (cuckoo_hash_init(&vnic->fastpath_table, 3, 8)) {
++ EPRINTK("failed to allocate fastpath table\n");
++ goto fail_cuckoo;
++ }
++
++ vnic->hw.falcon.type = hw_msg->type;
++
++ switch (hw_msg->type) {
++ case NET_ACCEL_MSG_HWTYPE_FALCON_A:
++ hw_info = &hw_msg->resources.falcon_a.common;
++ /* Need the extra rptr register page on A1 */
++ io_kva = net_accel_map_iomem_page
++ (vnic->dev, hw_msg->resources.falcon_a.evq_rptr_gnt,
++ &vnic->hw.falcon.evq_rptr_mapping);
++ if (io_kva == NULL) {
++ EPRINTK("%s: evq_rptr permission failed\n", __FUNCTION__);
++ goto evq_rptr_fail;
++ }
++
++ vnic->hw.falcon.evq_rptr = io_kva +
++ (hw_info->evq_rptr & (PAGE_SIZE - 1));
++ break;
++ case NET_ACCEL_MSG_HWTYPE_FALCON_B:
++ hw_info = &hw_msg->resources.falcon_b;
++ break;
++ default:
++ goto bad_type;
++ }
++
++ /**** Event Queue ****/
++
++ /* Map the event queue pages */
++ evq_gnts = hw_info->evq_mem_gnts;
++ evq_order = hw_info->evq_order;
++
++ EPRINTK_ON(hw_info->evq_offs != 0);
++
++ DPRINTK("Will map evq %d pages\n", 1 << evq_order);
++
++ evq_base =
++ net_accel_map_grants_contig(vnic->dev, evq_gnts, 1 << evq_order,
++ &vnic->evq_mapping);
++ if (evq_base == NULL) {
++ EPRINTK("%s: evq_base failed\n", __FUNCTION__);
++ goto evq_fail;
++ }
++
++ /**** Doorbells ****/
++ /* Set up the doorbell mappings. */
++ doorbell_kva =
++ net_accel_map_iomem_page(vnic->dev, hw_info->doorbell_gnt,
++ &vnic->hw.falcon.doorbell_mapping);
++ if (doorbell_kva == NULL) {
++ EPRINTK("%s: doorbell permission failed\n", __FUNCTION__);
++ goto doorbell_fail;
++ }
++ vnic->hw.falcon.doorbell = doorbell_kva;
++
++ /* On Falcon_B we get the rptr from the doorbell page */
++ if (hw_msg->type == NET_ACCEL_MSG_HWTYPE_FALCON_B) {
++ vnic->hw.falcon.evq_rptr =
++ (u32 *)((char *)vnic->hw.falcon.doorbell
++ + hw_info->evq_rptr);
++ }
++
++ /**** DMA Queue ****/
++
++ /* Set up the DMA Queues from the message. */
++ tx_dma_kva = net_accel_map_grants_contig
++ (vnic->dev, &(hw_info->txdmaq_gnt), 1,
++ &vnic->hw.falcon.txdmaq_mapping);
++ if (tx_dma_kva == NULL) {
++ EPRINTK("%s: TX dma failed\n", __FUNCTION__);
++ goto tx_dma_fail;
++ }
++
++ rx_dma_kva = net_accel_map_grants_contig
++ (vnic->dev, &(hw_info->rxdmaq_gnt), 1,
++ &vnic->hw.falcon.rxdmaq_mapping);
++ if (rx_dma_kva == NULL) {
++ EPRINTK("%s: RX dma failed\n", __FUNCTION__);
++ goto rx_dma_fail;
++ }
++
++ /* Full confession */
++ DPRINTK("Mapped H/W"
++ " Tx DMAQ grant %x -> %p\n"
++ " Rx DMAQ grant %x -> %p\n"
++ " EVQ grant %x -> %p\n",
++ hw_info->txdmaq_gnt, tx_dma_kva,
++ hw_info->rxdmaq_gnt, rx_dma_kva,
++ evq_gnts[0], evq_base
++ );
++
++ memset(vi_data, 0, sizeof(vi_data));
++
++ /* TODO BUG11305: convert efhw_arch to ef_vi_arch
++ * e.g.
++ * arch = ef_vi_arch_from_efhw_arch(hw_info->nic_arch);
++ * assert(arch >= 0);
++ * nic_type.arch = arch;
++ */
++ nic_type.arch = (unsigned char)hw_info->nic_arch;
++ nic_type.variant = (char)hw_info->nic_variant;
++ nic_type.revision = (unsigned char)hw_info->nic_revision;
++
++ ef_vi_init_mapping_evq(vi_data, nic_type, hw_info->instance,
++ 1 << (evq_order + PAGE_SHIFT), evq_base,
++ (void *)0xdeadbeef);
++
++ ef_vi_init_mapping_vi(vi_data, nic_type, hw_info->rx_capacity,
++ hw_info->tx_capacity, hw_info->instance,
++ doorbell_kva, rx_dma_kva, tx_dma_kva, 0);
++
++ vi_state_size = ef_vi_calc_state_bytes(hw_info->rx_capacity,
++ hw_info->tx_capacity);
++ vnic->vi_state = (ef_vi_state *)kmalloc(vi_state_size, GFP_KERNEL);
++ if (vnic->vi_state == NULL) {
++ EPRINTK("%s: kmalloc for VI state failed\n", __FUNCTION__);
++ goto vi_state_fail;
++ }
++ ef_vi_init(&vnic->vi, vi_data, vnic->vi_state, &vnic->evq_state, 0);
++
++ ef_eventq_state_init(&vnic->vi);
++
++ ef_vi_state_init(&vnic->vi);
++
++ return 0;
++
++fini:
++ kfree(vnic->vi_state);
++ vnic->vi_state = NULL;
++vi_state_fail:
++ net_accel_unmap_grants_contig(vnic->dev, vnic->hw.falcon.rxdmaq_mapping);
++rx_dma_fail:
++ net_accel_unmap_grants_contig(vnic->dev, vnic->hw.falcon.txdmaq_mapping);
++tx_dma_fail:
++ net_accel_unmap_iomem_page(vnic->dev, vnic->hw.falcon.doorbell_mapping);
++ vnic->hw.falcon.doorbell = NULL;
++doorbell_fail:
++ net_accel_unmap_grants_contig(vnic->dev, vnic->evq_mapping);
++evq_fail:
++ if (vnic->hw.falcon.type == NET_ACCEL_MSG_HWTYPE_FALCON_A)
++ net_accel_unmap_iomem_page(vnic->dev,
++ vnic->hw.falcon.evq_rptr_mapping);
++ vnic->hw.falcon.evq_rptr = NULL;
++evq_rptr_fail:
++bad_type:
++ cuckoo_hash_destroy(&vnic->fastpath_table);
++fail_cuckoo:
++ return -EIO;
++}
++
++
++void netfront_accel_vi_ctor(netfront_accel_vnic *vnic)
++{
++ /* Just mark the VI as uninitialised. */
++ vnic->vi_state = NULL;
++}
++
++
++int netfront_accel_vi_init(netfront_accel_vnic *vnic, struct net_accel_msg_hw *hw_msg)
++{
++ BUG_ON(hw_msg == NULL);
++ return netfront_accel_vi_init_fini(vnic, hw_msg);
++}
++
++
++void netfront_accel_vi_dtor(netfront_accel_vnic *vnic)
++{
++ if (vnic->vi_state != NULL)
++ netfront_accel_vi_init_fini(vnic, NULL);
++}
++
++
++static
++void netfront_accel_vi_post_rx(netfront_accel_vnic *vnic, u16 id,
++ netfront_accel_pkt_desc *buf)
++{
++
++ int idx = vnic->rx_dma_batched;
++
++#if 0
++ VPRINTK("Posting buffer %d (0x%08x) for rx at index %d, space is %d\n",
++ id, buf->pkt_buff_addr, idx, ef_vi_receive_space(&vnic->vi));
++#endif
++ /* Set up a virtual buffer descriptor */
++ ef_vi_receive_init(&vnic->vi, buf->pkt_buff_addr, id,
++ /*rx_bytes=max*/0);
++
++ idx++;
++
++ vnic->rx_dma_level++;
++
++ /*
++ * Only push the descriptor to the card if we've reached the
++ * batch size. Otherwise, the descriptors can sit around for
++ * a while. There will be plenty available.
++ */
++ if (idx >= NETFRONT_ACCEL_RX_DESC_BATCH ||
++ vnic->rx_dma_level < NETFRONT_ACCEL_RX_DESC_BATCH) {
++#if 0
++ VPRINTK("Flushing %d rx descriptors.\n", idx);
++#endif
++
++ /* Push buffer to hardware */
++ ef_vi_receive_push(&vnic->vi);
++
++ idx = 0;
++ }
++
++ vnic->rx_dma_batched = idx;
++}
++
++
++inline
++void netfront_accel_vi_post_rx_or_free(netfront_accel_vnic *vnic, u16 id,
++ netfront_accel_pkt_desc *buf)
++{
++
++ VPRINTK("%s: %d\n", __FUNCTION__, id);
++
++ if (ef_vi_receive_space(&vnic->vi) <= vnic->rx_dma_batched) {
++ VPRINTK("RX space is full\n");
++ netfront_accel_buf_put(vnic->rx_bufs, id);
++ return;
++ }
++
++ VPRINTK("Completed buffer %d is reposted\n", id);
++ netfront_accel_vi_post_rx(vnic, id, buf);
++
++ /*
++ * Let's see if there's any more to be pushed out to the NIC
++ * while we're here
++ */
++ while (ef_vi_receive_space(&vnic->vi) > vnic->rx_dma_batched) {
++ /* Try to allocate a buffer. */
++ buf = netfront_accel_buf_get(vnic->rx_bufs);
++ if (buf == NULL)
++ break;
++
++ /* Add it to the rx dma queue. */
++ netfront_accel_vi_post_rx(vnic, buf->buf_id, buf);
++ }
++}
++
++
++void netfront_accel_vi_add_bufs(netfront_accel_vnic *vnic, int is_rx)
++{
++
++ while (is_rx &&
++ ef_vi_receive_space(&vnic->vi) > vnic->rx_dma_batched) {
++ netfront_accel_pkt_desc *buf;
++
++ VPRINTK("%s: %d\n", __FUNCTION__, vnic->rx_dma_level);
++
++ /* Try to allocate a buffer. */
++ buf = netfront_accel_buf_get(vnic->rx_bufs);
++
++ if (buf == NULL)
++ break;
++
++ /* Add it to the rx dma queue. */
++ netfront_accel_vi_post_rx(vnic, buf->buf_id, buf);
++ }
++
++ VPRINTK("%s: done\n", __FUNCTION__);
++}
++
++
++struct netfront_accel_multi_state {
++ unsigned remaining_len;
++
++ unsigned buffers;
++
++ struct netfront_accel_tso_buffer *output_buffers;
++
++ /* Where we are in the current fragment of the SKB. */
++ struct {
++ /* address of current position */
++ void *addr;
++ /* remaining length */
++ unsigned int len;
++ } ifc; /* == Input Fragment Cursor */
++};
++
++
++static inline void multi_post_start(struct netfront_accel_multi_state *st,
++ struct sk_buff *skb)
++{
++ st->remaining_len = skb->len;
++ st->output_buffers = NULL;
++ st->buffers = 0;
++ st->ifc.len = skb_headlen(skb);
++ st->ifc.addr = skb->data;
++}
++
++static int multi_post_start_new_buffer(netfront_accel_vnic *vnic,
++ struct netfront_accel_multi_state *st)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++ struct netfront_accel_pkt_desc *buf;
++
++ /* Get a mapped packet buffer */
++ buf = netfront_accel_buf_get(vnic->tx_bufs);
++ if (buf == NULL) {
++ DPRINTK("%s: No buffer for TX\n", __FUNCTION__);
++ return -1;
++ }
++
++ /* Store a bit of meta-data at the end */
++ tso_buf = (struct netfront_accel_tso_buffer *)
++ (buf->pkt_kva + NETFRONT_ACCEL_TX_BUF_LENGTH);
++
++ tso_buf->buf = buf;
++
++ tso_buf->length = 0;
++
++ tso_buf->next = st->output_buffers;
++ st->output_buffers = tso_buf;
++ st->buffers++;
++
++ BUG_ON(st->buffers >= ACCEL_TX_MAX_BUFFERS);
++
++ /*
++ * Store the context, set to NULL, last packet buffer will get
++ * non-NULL later
++ */
++ tso_buf->buf->skb = NULL;
++
++ return 0;
++}
++
++
++static void
++multi_post_fill_buffer_with_fragment(netfront_accel_vnic *vnic,
++ struct netfront_accel_multi_state *st)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++ unsigned n, space;
++
++ BUG_ON(st->output_buffers == NULL);
++ tso_buf = st->output_buffers;
++
++ if (st->ifc.len == 0) return;
++ if (tso_buf->length == NETFRONT_ACCEL_TX_BUF_LENGTH) return;
++
++ BUG_ON(tso_buf->length > NETFRONT_ACCEL_TX_BUF_LENGTH);
++
++ space = NETFRONT_ACCEL_TX_BUF_LENGTH - tso_buf->length;
++ n = min(st->ifc.len, space);
++
++ memcpy(tso_buf->buf->pkt_kva + tso_buf->length, st->ifc.addr, n);
++
++ st->remaining_len -= n;
++ st->ifc.len -= n;
++ tso_buf->length += n;
++ st->ifc.addr += n;
++
++ BUG_ON(tso_buf->length > NETFRONT_ACCEL_TX_BUF_LENGTH);
++
++ return;
++}
++
++
++static inline void multi_post_unwind(netfront_accel_vnic *vnic,
++ struct netfront_accel_multi_state *st)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++
++ DPRINTK("%s\n", __FUNCTION__);
++
++ while (st->output_buffers != NULL) {
++ tso_buf = st->output_buffers;
++ st->output_buffers = tso_buf->next;
++ st->buffers--;
++ netfront_accel_buf_put(vnic->tx_bufs, tso_buf->buf->buf_id);
++ }
++ BUG_ON(st->buffers != 0);
++}
++
++
++static enum netfront_accel_post_status
++netfront_accel_enqueue_skb_multi(netfront_accel_vnic *vnic, struct sk_buff *skb)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++ struct netfront_accel_multi_state state;
++ ef_iovec iovecs[ACCEL_TX_MAX_BUFFERS];
++ skb_frag_t *f;
++ int frag_i, rc, dma_id;
++
++ multi_post_start(&state, skb);
++
++ frag_i = -1;
++
++ if (skb->ip_summed == CHECKSUM_HW) {
++ /* Set to zero to encourage falcon to work it out for us */
++ *(u16*)(skb->h.raw + skb->csum) = 0;
++ }
++
++ if (multi_post_start_new_buffer(vnic, &state)) {
++ DPRINTK("%s: out of buffers\n", __FUNCTION__);
++ goto unwind;
++ }
++
++ while (1) {
++ multi_post_fill_buffer_with_fragment(vnic, &state);
++
++ /* Move onto the next fragment? */
++ if (state.ifc.len == 0) {
++ if (++frag_i >= skb_shinfo(skb)->nr_frags)
++ /* End of payload reached. */
++ break;
++ f = &skb_shinfo(skb)->frags[frag_i];
++ state.ifc.len = f->size;
++ state.ifc.addr = page_address(f->page) + f->page_offset;
++ }
++
++ /* Start a new buffer? */
++ if ((state.output_buffers->length ==
++ NETFRONT_ACCEL_TX_BUF_LENGTH) &&
++ multi_post_start_new_buffer(vnic, &state)) {
++ DPRINTK("%s: out of buffers\n", __FUNCTION__);
++ goto unwind;
++ }
++ }
++
++ /* Check for space */
++ if (ef_vi_transmit_space(&vnic->vi) < state.buffers) {
++ DPRINTK("%s: Not enough TX space (%d)\n", __FUNCTION__, state.buffers);
++ goto unwind;
++ }
++
++ /* Store the skb in what will be the last buffer's context */
++ state.output_buffers->buf->skb = skb;
++ /* Remember dma_id of what will be the last buffer */
++ dma_id = state.output_buffers->buf->buf_id;
++
++ /*
++ * Make an iovec of the buffers in the list, reversing the
++ * buffers as we go as they are constructed on a stack
++ */
++ tso_buf = state.output_buffers;
++ for (frag_i = state.buffers-1; frag_i >= 0; frag_i--) {
++ iovecs[frag_i].iov_base = tso_buf->buf->pkt_buff_addr;
++ iovecs[frag_i].iov_len = tso_buf->length;
++ tso_buf = tso_buf->next;
++ }
++
++ rc = ef_vi_transmitv(&vnic->vi, iovecs, state.buffers, dma_id);
++
++ /* Track number of tx fastpath stats */
++ vnic->netdev_stats.fastpath_tx_bytes += skb->len;
++ vnic->netdev_stats.fastpath_tx_pkts ++;
++#if NETFRONT_ACCEL_STATS
++ {
++ u32 n;
++ n = vnic->netdev_stats.fastpath_tx_pkts -
++ (u32)vnic->stats.fastpath_tx_completions;
++ if (n > vnic->stats.fastpath_tx_pending_max)
++ vnic->stats.fastpath_tx_pending_max = n;
++ }
++#endif
++ return NETFRONT_ACCEL_STATUS_GOOD;
++
++unwind:
++ multi_post_unwind(vnic, &state);
++
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.fastpath_tx_busy++);
++
++ return NETFRONT_ACCEL_STATUS_BUSY;
++}
++
++
++static enum netfront_accel_post_status
++netfront_accel_enqueue_skb_single(netfront_accel_vnic *vnic, struct sk_buff *skb)
++{
++ struct netfront_accel_tso_buffer *tso_buf;
++ struct netfront_accel_pkt_desc *buf;
++ u8 *kva;
++ int rc;
++
++ if (ef_vi_transmit_space(&vnic->vi) < 1) {
++ DPRINTK("%s: No TX space\n", __FUNCTION__);
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.fastpath_tx_busy++);
++ return NETFRONT_ACCEL_STATUS_BUSY;
++ }
++
++ buf = netfront_accel_buf_get(vnic->tx_bufs);
++ if (buf == NULL) {
++ DPRINTK("%s: No buffer for TX\n", __FUNCTION__);
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.fastpath_tx_busy++);
++ return NETFRONT_ACCEL_STATUS_BUSY;
++ }
++
++ /* Track number of tx fastpath stats */
++ vnic->netdev_stats.fastpath_tx_pkts++;
++ vnic->netdev_stats.fastpath_tx_bytes += skb->len;
++
++#if NETFRONT_ACCEL_STATS
++ {
++ u32 n;
++ n = vnic->netdev_stats.fastpath_tx_pkts -
++ (u32)vnic->stats.fastpath_tx_completions;
++ if (n > vnic->stats.fastpath_tx_pending_max)
++ vnic->stats.fastpath_tx_pending_max = n;
++ }
++#endif
++
++ /* Store the context */
++ buf->skb = skb;
++
++ kva = buf->pkt_kva;
++
++ if (skb->ip_summed == CHECKSUM_HW) {
++ /* Set to zero to encourage falcon to work it out for us */
++ *(u16*)(skb->h.raw + skb->csum) = 0;
++ }
++ NETFRONT_ACCEL_PKTBUFF_FOR_EACH_FRAGMENT
++ (skb, idx, frag_data, frag_len, {
++ /* Copy in payload */
++ VPRINTK("*** Copying %d bytes to %p\n", frag_len, kva);
++ memcpy(kva, frag_data, frag_len);
++ kva += frag_len;
++ });
++
++ VPRINTK("%s: id %d pkt %p kva %p buff_addr 0x%08x\n", __FUNCTION__,
++ buf->buf_id, buf, buf->pkt_kva, buf->pkt_buff_addr);
++
++
++ /* Set up the TSO meta-data for a single buffer/packet */
++ tso_buf = (struct netfront_accel_tso_buffer *)
++ (buf->pkt_kva + NETFRONT_ACCEL_TX_BUF_LENGTH);
++ tso_buf->next = NULL;
++ tso_buf->buf = buf;
++ tso_buf->length = skb->len;
++
++ rc = ef_vi_transmit(&vnic->vi, buf->pkt_buff_addr, skb->len,
++ buf->buf_id);
++ /* We checked for space already, so it really should succeed */
++ BUG_ON(rc != 0);
++
++ return NETFRONT_ACCEL_STATUS_GOOD;
++}
++
++
++enum netfront_accel_post_status
++netfront_accel_vi_tx_post(netfront_accel_vnic *vnic, struct sk_buff *skb)
++{
++ struct ethhdr *pkt_eth_hdr;
++ struct iphdr *pkt_ipv4_hdr;
++ int value, try_fastpath;
++
++ /*
++ * This assumes that the data field points to the dest mac
++ * address.
++ */
++ cuckoo_hash_mac_key key = cuckoo_mac_to_key(skb->data);
++
++ /*
++ * NB very important that all things that could return "CANT"
++ * are tested before things that return "BUSY" as if it it
++ * returns "BUSY" it is assumed that it won't return "CANT"
++ * next time it is tried
++ */
++
++ /*
++ * Do a fastpath send if fast path table lookup returns true.
++ * We do this without the table lock and so may get the wrong
++ * answer, but current opinion is that's not a big problem
++ */
++ try_fastpath = cuckoo_hash_lookup(&vnic->fastpath_table,
++ (cuckoo_hash_key *)(&key), &value);
++
++ if (!try_fastpath) {
++ VPRINTK("try fast path false for mac: " MAC_FMT "\n",
++ MAC_ARG(skb->data));
++
++ return NETFRONT_ACCEL_STATUS_CANT;
++ }
++
++ /* Check to see if the packet can be sent. */
++ if (skb_headlen(skb) < sizeof(*pkt_eth_hdr) + sizeof(*pkt_ipv4_hdr)) {
++ EPRINTK("%s: Packet header is too small\n", __FUNCTION__);
++ return NETFRONT_ACCEL_STATUS_CANT;
++ }
++
++ pkt_eth_hdr = (void*)skb->data;
++ pkt_ipv4_hdr = (void*)(pkt_eth_hdr+1);
++
++ if (be16_to_cpu(pkt_eth_hdr->h_proto) != ETH_P_IP) {
++ DPRINTK("%s: Packet is not IPV4 (ether_type=0x%04x)\n", __FUNCTION__,
++ be16_to_cpu(pkt_eth_hdr->h_proto));
++ return NETFRONT_ACCEL_STATUS_CANT;
++ }
++
++ if (pkt_ipv4_hdr->protocol != IPPROTO_TCP &&
++ pkt_ipv4_hdr->protocol != IPPROTO_UDP) {
++ DPRINTK("%s: Packet is not TCP/UDP (ip_protocol=0x%02x)\n",
++ __FUNCTION__, pkt_ipv4_hdr->protocol);
++ return NETFRONT_ACCEL_STATUS_CANT;
++ }
++
++ VPRINTK("%s: %d bytes, gso %d\n", __FUNCTION__, skb->len,
++ skb_shinfo(skb)->gso_size);
++
++ if (skb_shinfo(skb)->gso_size) {
++ return netfront_accel_enqueue_skb_tso(vnic, skb);
++ }
++
++ if (skb->len <= NETFRONT_ACCEL_TX_BUF_LENGTH) {
++ return netfront_accel_enqueue_skb_single(vnic, skb);
++ }
++
++ return netfront_accel_enqueue_skb_multi(vnic, skb);
++}
++
++
++/*
++ * Copy the data to required end destination. NB. len is the total new
++ * length of the socket buffer, not the amount of data to copy
++ */
++inline
++int ef_vnic_copy_to_skb(netfront_accel_vnic *vnic, struct sk_buff *skb,
++ struct netfront_accel_pkt_desc *buf, int len)
++{
++ int i, extra = len - skb->len;
++ char c;
++ int pkt_stride = vnic->rx_pkt_stride;
++ int skb_stride = vnic->rx_skb_stride;
++ char *skb_start;
++
++ /*
++ * This pulls stuff into the cache - have seen performance
++ * benefit in this, but disabled by default
++ */
++ skb_start = skb->data;
++ if (pkt_stride) {
++ for (i = 0; i < len; i += pkt_stride) {
++ c += ((volatile char*)(buf->pkt_kva))[i];
++ }
++ }
++ if (skb_stride) {
++ for (i = skb->len; i < len ; i += skb_stride) {
++ c += ((volatile char*)(skb_start))[i];
++ }
++ }
++
++ if (skb_tailroom(skb) >= extra) {
++ memcpy(skb_put(skb, extra), buf->pkt_kva, extra);
++ return 0;
++ }
++
++ return -ENOSPC;
++}
++
++
++static void discard_jumbo_state(netfront_accel_vnic *vnic)
++{
++
++ if (vnic->jumbo_state.skb != NULL) {
++ dev_kfree_skb_any(vnic->jumbo_state.skb);
++
++ vnic->jumbo_state.skb = NULL;
++ }
++ vnic->jumbo_state.in_progress = 0;
++}
++
++
++static void netfront_accel_vi_rx_complete(netfront_accel_vnic *vnic,
++ struct sk_buff *skb)
++{
++ cuckoo_hash_mac_key key;
++ unsigned long flags;
++ int value;
++ struct net_device *net_dev;
++
++
++ key = cuckoo_mac_to_key(skb->data + ETH_ALEN);
++
++ /*
++ * If this is a MAC address that we want to do fast path TX
++ * to, and we don't already, add it to the fastpath table.
++ * The initial lookup is done without the table lock and so
++ * may get the wrong answer, but current opinion is that's not
++ * a big problem
++ */
++ if (is_valid_ether_addr(skb->data + ETH_ALEN) &&
++ !cuckoo_hash_lookup(&vnic->fastpath_table, (cuckoo_hash_key *)&key,
++ &value)) {
++ spin_lock_irqsave(&vnic->table_lock, flags);
++
++ cuckoo_hash_add_check(&vnic->fastpath_table,
++ (cuckoo_hash_key *)&key,
++ 1, 1);
++
++ spin_unlock_irqrestore(&vnic->table_lock, flags);
++ }
++
++ if (compare_ether_addr(skb->data, vnic->mac)) {
++ struct iphdr *ip = (struct iphdr *)(skb->data + ETH_HLEN);
++ u16 port;
++
++ DPRINTK("%s: saw wrong MAC address " MAC_FMT "\n",
++ __FUNCTION__, MAC_ARG(skb->data));
++
++ if (ip->protocol == IPPROTO_TCP) {
++ struct tcphdr *tcp = (struct tcphdr *)
++ ((char *)ip + 4 * ip->ihl);
++ port = tcp->dest;
++ } else {
++ struct udphdr *udp = (struct udphdr *)
++ ((char *)ip + 4 * ip->ihl);
++ EPRINTK_ON(ip->protocol != IPPROTO_UDP);
++ port = udp->dest;
++ }
++
++ netfront_accel_msg_tx_fastpath(vnic, skb->data,
++ ip->daddr, port,
++ ip->protocol);
++ }
++
++ net_dev = vnic->net_dev;
++ skb->dev = net_dev;
++ skb->protocol = eth_type_trans(skb, net_dev);
++ /* CHECKSUM_UNNECESSARY as hardware has done it already */
++ skb->ip_summed = CHECKSUM_UNNECESSARY;
++
++ if (!netfront_accel_ssr_skb(vnic, &vnic->ssr_state, skb))
++ netif_receive_skb(skb);
++}
++
++
++static int netfront_accel_vi_poll_process_rx(netfront_accel_vnic *vnic,
++ ef_event *ev)
++{
++ struct netfront_accel_bufinfo *bufinfo = vnic->rx_bufs;
++ struct netfront_accel_pkt_desc *buf = NULL;
++ struct sk_buff *skb;
++ int id, len, sop = 0, cont = 0;
++
++ VPRINTK("Rx event.\n");
++ /*
++ * Complete the receive operation, and get the request id of
++ * the buffer
++ */
++ id = ef_vi_receive_done(&vnic->vi, ev);
++
++ if (id < 0 || id >= bufinfo->npages*NETFRONT_ACCEL_BUFS_PER_PAGE) {
++ EPRINTK("Rx packet %d is invalid\n", id);
++ /* Carry on round the loop if more events */
++ goto bad_packet;
++ }
++ /* Get our buffer descriptor */
++ buf = netfront_accel_buf_find(bufinfo, id);
++
++ len = EF_EVENT_RX_BYTES(*ev);
++
++ /* An RX buffer has been removed from the DMA ring. */
++ vnic->rx_dma_level--;
++
++ if (EF_EVENT_TYPE(*ev) == EF_EVENT_TYPE_RX) {
++ sop = EF_EVENT_RX_SOP(*ev);
++ cont = EF_EVENT_RX_CONT(*ev);
++
++ skb = vnic->jumbo_state.skb;
++
++ VPRINTK("Rx packet %d: %d bytes so far; sop %d; cont %d\n",
++ id, len, sop, cont);
++
++ if (sop) {
++ if (!vnic->jumbo_state.in_progress) {
++ vnic->jumbo_state.in_progress = 1;
++ BUG_ON(vnic->jumbo_state.skb != NULL);
++ } else {
++ /*
++ * This fragment shows a missing tail in
++ * previous one, but is itself possibly OK
++ */
++ DPRINTK("sop and in_progress => no tail\n");
++
++ /* Release the socket buffer we already had */
++ discard_jumbo_state(vnic);
++
++ /* Now start processing this fragment */
++ vnic->jumbo_state.in_progress = 1;
++ skb = NULL;
++ }
++ } else if (!vnic->jumbo_state.in_progress) {
++ DPRINTK("!sop and !in_progress => missing head\n");
++ goto missing_head;
++ }
++
++ if (!cont) {
++ /* Update state for next time */
++ vnic->jumbo_state.in_progress = 0;
++ vnic->jumbo_state.skb = NULL;
++ } else if (!vnic->jumbo_state.in_progress) {
++ DPRINTK("cont and !in_progress => missing head\n");
++ goto missing_head;
++ }
++
++ if (skb == NULL) {
++ BUG_ON(!sop);
++
++ if (!cont)
++ skb = alloc_skb(len+NET_IP_ALIGN, GFP_ATOMIC);
++ else
++ skb = alloc_skb(vnic->net_dev->mtu+NET_IP_ALIGN,
++ GFP_ATOMIC);
++
++ if (skb == NULL) {
++ DPRINTK("%s: Couldn't get an rx skb.\n",
++ __FUNCTION__);
++ netfront_accel_vi_post_rx_or_free(vnic, (u16)id, buf);
++ /*
++ * Dropping this fragment means we
++ * should discard the rest too
++ */
++ discard_jumbo_state(vnic);
++
++ /* Carry on round the loop if more events */
++ return 0;
++ }
++
++ }
++
++ /* Copy the data to required end destination */
++ if (ef_vnic_copy_to_skb(vnic, skb, buf, len) != 0) {
++ /*
++ * No space in the skb - suggests > MTU packet
++ * received
++ */
++ EPRINTK("%s: Rx packet too large (%d)\n",
++ __FUNCTION__, len);
++ netfront_accel_vi_post_rx_or_free(vnic, (u16)id, buf);
++ discard_jumbo_state(vnic);
++ return 0;
++ }
++
++ /* Put the buffer back in the DMA queue. */
++ netfront_accel_vi_post_rx_or_free(vnic, (u16)id, buf);
++
++ if (cont) {
++ vnic->jumbo_state.skb = skb;
++
++ return 0;
++ } else {
++ /* Track number of rx fastpath packets */
++ vnic->netdev_stats.fastpath_rx_pkts++;
++ vnic->netdev_stats.fastpath_rx_bytes += len;
++
++ netfront_accel_vi_rx_complete(vnic, skb);
++
++ return 1;
++ }
++ } else {
++ BUG_ON(EF_EVENT_TYPE(*ev) != EF_EVENT_TYPE_RX_DISCARD);
++
++ if (EF_EVENT_RX_DISCARD_TYPE(*ev)
++ == EF_EVENT_RX_DISCARD_TRUNC) {
++ DPRINTK("%s: " EF_EVENT_FMT
++ " buffer %d FRM_TRUNC q_id %d\n",
++ __FUNCTION__, EF_EVENT_PRI_ARG(*ev), id,
++ EF_EVENT_RX_DISCARD_Q_ID(*ev) );
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.fastpath_frm_trunc);
++ } else if (EF_EVENT_RX_DISCARD_TYPE(*ev)
++ == EF_EVENT_RX_DISCARD_OTHER) {
++ DPRINTK("%s: " EF_EVENT_FMT
++ " buffer %d RX_DISCARD_OTHER q_id %d\n",
++ __FUNCTION__, EF_EVENT_PRI_ARG(*ev), id,
++ EF_EVENT_RX_DISCARD_Q_ID(*ev) );
++ /*
++ * Probably tail of packet for which error has
++ * already been logged, so don't count in
++ * stats
++ */
++ } else {
++ EPRINTK("%s: " EF_EVENT_FMT
++ " buffer %d rx discard type %d q_id %d\n",
++ __FUNCTION__, EF_EVENT_PRI_ARG(*ev), id,
++ EF_EVENT_RX_DISCARD_TYPE(*ev),
++ EF_EVENT_RX_DISCARD_Q_ID(*ev) );
++ NETFRONT_ACCEL_STATS_OP(++vnic->stats.bad_event_count);
++ }
++ }
++
++ /* discard type drops through here */
++
++bad_packet:
++ /* Release the socket buffer we already had */
++ discard_jumbo_state(vnic);
++
++missing_head:
++ BUG_ON(vnic->jumbo_state.in_progress != 0);
++ BUG_ON(vnic->jumbo_state.skb != NULL);
++
++ if (id >= 0 && id < bufinfo->npages*NETFRONT_ACCEL_BUFS_PER_PAGE)
++ /* Put the buffer back in the DMA queue. */
++ netfront_accel_vi_post_rx_or_free(vnic, (u16)id, buf);
++
++ vnic->netdev_stats.fastpath_rx_errors++;
++
++ DPRINTK("%s experienced bad packet/missing fragment error: %d \n",
++ __FUNCTION__, ev->rx.flags);
++
++ return 0;
++}
++
++
++static void netfront_accel_vi_not_busy(netfront_accel_vnic *vnic)
++{
++ struct netfront_info *np = ((struct netfront_info *)
++ netdev_priv(vnic->net_dev));
++ struct sk_buff *skb;
++ int handled;
++ unsigned long flags;
++
++ /*
++ * TODO if we could safely check tx_skb == NULL and return
++ * early without taking the lock, that would obviously help
++ * performance
++ */
++
++ /* Take the netfront lock which protects tx_skb. */
++ spin_lock_irqsave(&np->tx_lock, flags);
++ if (vnic->tx_skb != NULL) {
++ DPRINTK("%s trying to send spare buffer\n", __FUNCTION__);
++
++ skb = vnic->tx_skb;
++ vnic->tx_skb = NULL;
++
++ spin_unlock_irqrestore(&np->tx_lock, flags);
++
++ handled = netfront_accel_vi_tx_post(vnic, skb);
++
++ spin_lock_irqsave(&np->tx_lock, flags);
++
++ if (handled != NETFRONT_ACCEL_STATUS_BUSY) {
++ DPRINTK("%s restarting tx\n", __FUNCTION__);
++ if (netfront_check_queue_ready(vnic->net_dev)) {
++ netif_wake_queue(vnic->net_dev);
++ NETFRONT_ACCEL_STATS_OP
++ (vnic->stats.queue_wakes++);
++ }
++ } else {
++ vnic->tx_skb = skb;
++ }
++
++ /*
++ * Should never get a CANT, as it checks that before
++ * deciding it was BUSY first time round
++ */
++ BUG_ON(handled == NETFRONT_ACCEL_STATUS_CANT);
++ }
++ spin_unlock_irqrestore(&np->tx_lock, flags);
++}
++
++
++static void netfront_accel_vi_tx_complete(netfront_accel_vnic *vnic,
++ struct netfront_accel_tso_buffer *tso_buf,
++ int is_last)
++{
++ struct netfront_accel_tso_buffer *next;
++
++ /*
++ * We get a single completion for every call to
++ * ef_vi_transmitv so handle any other buffers which are part
++ * of the same packet
++ */
++ while (tso_buf != NULL) {
++ if (tso_buf->buf->skb != NULL) {
++ dev_kfree_skb_any(tso_buf->buf->skb);
++ tso_buf->buf->skb = NULL;
++ }
++
++ next = tso_buf->next;
++
++ netfront_accel_buf_put(vnic->tx_bufs, tso_buf->buf->buf_id);
++
++ tso_buf = next;
++ }
++
++ /*
++ * If this was the last one in the batch, we try and send any
++ * pending tx_skb. There should now be buffers and
++ * descriptors
++ */
++ if (is_last)
++ netfront_accel_vi_not_busy(vnic);
++}
++
++
++static void netfront_accel_vi_poll_process_tx(netfront_accel_vnic *vnic,
++ ef_event *ev)
++{
++ struct netfront_accel_pkt_desc *buf;
++ struct netfront_accel_tso_buffer *tso_buf;
++ ef_request_id ids[EF_VI_TRANSMIT_BATCH];
++ int i, n_ids;
++ unsigned long flags;
++
++ /* Get the request ids for this tx completion event. */
++ n_ids = ef_vi_transmit_unbundle(&vnic->vi, ev, ids);
++
++ /* Take the tx buffer spin lock and hold for the duration */
++ spin_lock_irqsave(&vnic->tx_lock, flags);
++
++ for (i = 0; i < n_ids; ++i) {
++ VPRINTK("Tx packet %d complete\n", ids[i]);
++ buf = netfront_accel_buf_find(vnic->tx_bufs, ids[i]);
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.fastpath_tx_completions++);
++
++ tso_buf = (struct netfront_accel_tso_buffer *)
++ (buf->pkt_kva + NETFRONT_ACCEL_TX_BUF_LENGTH);
++ BUG_ON(tso_buf->buf != buf);
++
++ netfront_accel_vi_tx_complete(vnic, tso_buf, i == (n_ids-1));
++ }
++
++ spin_unlock_irqrestore(&vnic->tx_lock, flags);
++}
++
++
++int netfront_accel_vi_poll(netfront_accel_vnic *vnic, int rx_packets)
++{
++ ef_event ev[ACCEL_VI_POLL_EVENTS];
++ int rx_remain = rx_packets, rc, events, i;
++#if NETFRONT_ACCEL_STATS
++ int n_evs_polled = 0, rx_evs_polled = 0, tx_evs_polled = 0;
++#endif
++ BUG_ON(rx_packets <= 0);
++
++ events = ef_eventq_poll(&vnic->vi, ev,
++ min(rx_remain, ACCEL_VI_POLL_EVENTS));
++ i = 0;
++ NETFRONT_ACCEL_STATS_OP(n_evs_polled += events);
++
++ VPRINTK("%s: %d events\n", __FUNCTION__, events);
++
++ /* Loop over each event */
++ while (events) {
++ VPRINTK("%s: Event "EF_EVENT_FMT", index %lu\n", __FUNCTION__,
++ EF_EVENT_PRI_ARG(ev[i]),
++ (unsigned long)(vnic->vi.evq_state->evq_ptr));
++
++ if ((EF_EVENT_TYPE(ev[i]) == EF_EVENT_TYPE_RX) ||
++ (EF_EVENT_TYPE(ev[i]) == EF_EVENT_TYPE_RX_DISCARD)) {
++ rc = netfront_accel_vi_poll_process_rx(vnic, &ev[i]);
++ rx_remain -= rc;
++ BUG_ON(rx_remain < 0);
++ NETFRONT_ACCEL_STATS_OP(rx_evs_polled++);
++ } else if (EF_EVENT_TYPE(ev[i]) == EF_EVENT_TYPE_TX) {
++ netfront_accel_vi_poll_process_tx(vnic, &ev[i]);
++ NETFRONT_ACCEL_STATS_OP(tx_evs_polled++);
++ } else if (EF_EVENT_TYPE(ev[i]) ==
++ EF_EVENT_TYPE_RX_NO_DESC_TRUNC) {
++ DPRINTK("%s: RX_NO_DESC_TRUNC " EF_EVENT_FMT "\n",
++ __FUNCTION__, EF_EVENT_PRI_ARG(ev[i]));
++ discard_jumbo_state(vnic);
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.rx_no_desc_trunc++);
++ } else {
++ EPRINTK("Unexpected event " EF_EVENT_FMT "\n",
++ EF_EVENT_PRI_ARG(ev[i]));
++ NETFRONT_ACCEL_STATS_OP(vnic->stats.bad_event_count++);
++ }
++
++ i++;
++
++ /* Carry on round the loop if more events and more space */
++ if (i == events) {
++ if (rx_remain == 0)
++ break;
++
++ events = ef_eventq_poll(&vnic->vi, ev,
++ min(rx_remain,
++ ACCEL_VI_POLL_EVENTS));
++ i = 0;
++ NETFRONT_ACCEL_STATS_OP(n_evs_polled += events);
++ }
++ }
++
++#if NETFRONT_ACCEL_STATS
++ vnic->stats.event_count += n_evs_polled;
++ vnic->stats.event_count_since_irq += n_evs_polled;
++ if (n_evs_polled > vnic->stats.events_per_poll_max)
++ vnic->stats.events_per_poll_max = n_evs_polled;
++ if (rx_evs_polled > vnic->stats.events_per_poll_rx_max)
++ vnic->stats.events_per_poll_rx_max = rx_evs_polled;
++ if (tx_evs_polled > vnic->stats.events_per_poll_tx_max)
++ vnic->stats.events_per_poll_tx_max = tx_evs_polled;
++#endif
++
++ return rx_packets - rx_remain;
++}
++
++
++int netfront_accel_vi_enable_interrupts(netfront_accel_vnic *vnic)
++{
++ u32 sw_evq_ptr;
++
++ VPRINTK("%s: checking for event on %p\n", __FUNCTION__, &vnic->vi.evq_state);
++
++ BUG_ON(vnic == NULL);
++ BUG_ON(vnic->vi.evq_state == NULL);
++
++ /* Do a quick check for an event. */
++ if (ef_eventq_has_event(&vnic->vi)) {
++ VPRINTK("%s: found event\n", __FUNCTION__);
++ return 0;
++ }
++
++ VPRINTK("evq_ptr=0x%08x evq_mask=0x%08x\n",
++ vnic->evq_state.evq_ptr, vnic->vi.evq_mask);
++
++ /* Request a wakeup from the hardware. */
++ sw_evq_ptr = vnic->evq_state.evq_ptr & vnic->vi.evq_mask;
++
++ BUG_ON(vnic->hw.falcon.evq_rptr == NULL);
++
++ VPRINTK("Requesting wakeup at 0x%08x, rptr %p\n", sw_evq_ptr,
++ vnic->hw.falcon.evq_rptr);
++ *(volatile u32 *)(vnic->hw.falcon.evq_rptr) = (sw_evq_ptr >> 3);
++
++ return 1;
++}
+Index: head-2008-11-25/drivers/xen/sfc_netfront/accel_xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/accel_xenbus.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,776 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/stddef.h>
++#include <linux/errno.h>
++
++#include <xen/xenbus.h>
++#include <xen/evtchn.h>
++#include <xen/gnttab.h>
++
++#include "accel.h"
++#include "accel_util.h"
++#include "accel_msg_iface.h"
++#include "accel_bufs.h"
++#include "accel_ssr.h"
++/* drivers/xen/netfront/netfront.h */
++#include "netfront.h"
++
++void netfront_accel_set_closing(netfront_accel_vnic *vnic)
++{
++
++ vnic->frontend_state = XenbusStateClosing;
++ net_accel_update_state(vnic->dev, XenbusStateClosing);
++}
++
++
++static void mac_address_change(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ netfront_accel_vnic *vnic;
++ struct xenbus_device *dev;
++ int rc;
++
++ DPRINTK("%s\n", __FUNCTION__);
++
++ vnic = container_of(watch, netfront_accel_vnic,
++ mac_address_watch);
++ dev = vnic->dev;
++
++ rc = net_accel_xen_net_read_mac(dev, vnic->mac);
++
++ if (rc != 0)
++ EPRINTK("%s: failed to read mac (%d)\n", __FUNCTION__, rc);
++}
++
++
++static int setup_mac_address_watch(struct xenbus_device *dev,
++ netfront_accel_vnic *vnic)
++{
++ int err;
++
++ DPRINTK("Setting watch on %s/%s\n", dev->nodename, "mac");
++
++ err = xenbus_watch_path2(dev, dev->nodename, "mac",
++ &vnic->mac_address_watch,
++ mac_address_change);
++ if (err) {
++ EPRINTK("%s: Failed to register xenbus watch: %d\n",
++ __FUNCTION__, err);
++ goto fail;
++ }
++
++ return 0;
++ fail:
++ vnic->mac_address_watch.node = NULL;
++ return err;
++}
++
++
++/* Grant access to some pages and publish through xenbus */
++static int make_named_grant(struct xenbus_device *dev, void *page,
++ const char *name, grant_ref_t *gnt_ref)
++{
++ struct xenbus_transaction tr;
++ int err;
++ grant_ref_t gnt;
++
++ gnt = net_accel_grant_page(dev, virt_to_mfn(page), 0);
++ if (gnt < 0)
++ return gnt;
++
++ do {
++ err = xenbus_transaction_start(&tr);
++ if (err != 0) {
++ EPRINTK("%s: transaction start failed %d\n",
++ __FUNCTION__, err);
++ return err;
++ }
++ err = xenbus_printf(tr, dev->nodename, name, "%d", gnt);
++ if (err != 0) {
++ EPRINTK("%s: xenbus_printf failed %d\n", __FUNCTION__,
++ err);
++ xenbus_transaction_end(tr, 1);
++ return err;
++ }
++ err = xenbus_transaction_end(tr, 0);
++ } while (err == -EAGAIN);
++
++ if (err != 0) {
++ EPRINTK("%s: transaction end failed %d\n", __FUNCTION__, err);
++ return err;
++ }
++
++ *gnt_ref = gnt;
++
++ return 0;
++}
++
++
++static int remove_named_grant(struct xenbus_device *dev,
++ const char *name, grant_ref_t gnt_ref)
++{
++ struct xenbus_transaction tr;
++ int err;
++
++ net_accel_ungrant_page(gnt_ref);
++
++ do {
++ err = xenbus_transaction_start(&tr);
++ if (err != 0) {
++ EPRINTK("%s: transaction start failed %d\n",
++ __FUNCTION__, err);
++ return err;
++ }
++ err = xenbus_rm(tr, dev->nodename, name);
++ if (err != 0) {
++ EPRINTK("%s: xenbus_rm failed %d\n", __FUNCTION__,
++ err);
++ xenbus_transaction_end(tr, 1);
++ return err;
++ }
++ err = xenbus_transaction_end(tr, 0);
++ } while (err == -EAGAIN);
++
++ if (err != 0) {
++ EPRINTK("%s: transaction end failed %d\n", __FUNCTION__, err);
++ return err;
++ }
++
++ return 0;
++}
++
++
++static
++netfront_accel_vnic *netfront_accel_vnic_ctor(struct net_device *net_dev,
++ struct xenbus_device *dev)
++{
++ struct netfront_info *np =
++ (struct netfront_info *)netdev_priv(net_dev);
++ netfront_accel_vnic *vnic;
++ int err;
++
++ /*
++ * A bug in earlier versions of Xen accel plugin system meant
++ * you could be probed twice for the same device on suspend
++ * cancel. Be tolerant of that.
++ */
++ if (np->accel_priv != NULL)
++ return ERR_PTR(-EALREADY);
++
++ /* Alloc mem for state */
++ vnic = kzalloc(sizeof(netfront_accel_vnic), GFP_KERNEL);
++ if (vnic == NULL) {
++ EPRINTK("%s: no memory for vnic state\n", __FUNCTION__);
++ return ERR_PTR(-ENOMEM);
++ }
++
++ spin_lock_init(&vnic->tx_lock);
++
++ mutex_init(&vnic->vnic_mutex);
++ mutex_lock(&vnic->vnic_mutex);
++
++ /* Store so state can be retrieved from device */
++ BUG_ON(np->accel_priv != NULL);
++ np->accel_priv = vnic;
++ vnic->dev = dev;
++ vnic->net_dev = net_dev;
++ spin_lock_init(&vnic->irq_enabled_lock);
++ netfront_accel_ssr_init(&vnic->ssr_state);
++
++ init_waitqueue_head(&vnic->state_wait_queue);
++ vnic->backend_state = XenbusStateUnknown;
++ vnic->frontend_state = XenbusStateClosed;
++ vnic->removing = 0;
++ vnic->domU_state_is_setup = 0;
++ vnic->dom0_state_is_setup = 0;
++ vnic->poll_enabled = 0;
++ vnic->tx_enabled = 0;
++ vnic->tx_skb = NULL;
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
++ INIT_WORK(&vnic->msg_from_bend, netfront_accel_msg_from_bend);
++#else
++ INIT_WORK(&vnic->msg_from_bend, netfront_accel_msg_from_bend, vnic);
++#endif
++
++ netfront_accel_debugfs_create(vnic);
++
++ mutex_unlock(&vnic->vnic_mutex);
++
++ err = net_accel_xen_net_read_mac(dev, vnic->mac);
++ if (err)
++ goto fail_mac;
++
++ /* Setup a watch on the frontend's MAC address */
++ err = setup_mac_address_watch(dev, vnic);
++ if (err)
++ goto fail_mac;
++
++ return vnic;
++
++fail_mac:
++
++ mutex_lock(&vnic->vnic_mutex);
++
++ netfront_accel_debugfs_remove(vnic);
++
++ netfront_accel_ssr_fini(vnic, &vnic->ssr_state);
++
++ EPRINTK_ON(vnic->tx_skb != NULL);
++
++ vnic->frontend_state = XenbusStateUnknown;
++ net_accel_update_state(dev, XenbusStateUnknown);
++
++ mutex_unlock(&vnic->vnic_mutex);
++
++ np->accel_priv = NULL;
++ kfree(vnic);
++
++ return ERR_PTR(err);
++}
++
++
++static void netfront_accel_vnic_dtor(netfront_accel_vnic *vnic)
++{
++ struct net_device *net_dev = vnic->net_dev;
++ struct netfront_info *np =
++ (struct netfront_info *)netdev_priv(net_dev);
++
++ /*
++ * Now we don't hold the lock any more it is safe to remove
++ * this watch and synchonrise with the completion of
++ * watches
++ */
++ DPRINTK("%s: unregistering xenbus mac watch\n", __FUNCTION__);
++ unregister_xenbus_watch(&vnic->mac_address_watch);
++ kfree(vnic->mac_address_watch.node);
++
++ flush_workqueue(netfront_accel_workqueue);
++
++ mutex_lock(&vnic->vnic_mutex);
++
++ netfront_accel_debugfs_remove(vnic);
++
++ netfront_accel_ssr_fini(vnic, &vnic->ssr_state);
++
++ EPRINTK_ON(vnic->tx_skb != NULL);
++
++ vnic->frontend_state = XenbusStateUnknown;
++ net_accel_update_state(vnic->dev, XenbusStateUnknown);
++
++ mutex_unlock(&vnic->vnic_mutex);
++
++ np->accel_priv = NULL;
++ kfree(vnic);
++}
++
++
++static int vnic_setup_domU_shared_state(struct xenbus_device *dev,
++ netfront_accel_vnic *vnic)
++{
++ struct xenbus_transaction tr;
++ int err;
++ int msgs_per_queue;
++
++
++ DPRINTK("Setting up domU shared state.\n");
++
++ msgs_per_queue = (PAGE_SIZE/2) / sizeof(struct net_accel_msg);
++
++ /* Allocate buffer state */
++ vnic->tx_bufs = netfront_accel_init_bufs(&vnic->tx_lock);
++ if (vnic->tx_bufs == NULL) {
++ err = -ENOMEM;
++ EPRINTK("%s: Failed to allocate tx buffers\n", __FUNCTION__);
++ goto fail_tx_bufs;
++ }
++
++ vnic->rx_bufs = netfront_accel_init_bufs(NULL);
++ if (vnic->rx_bufs == NULL) {
++ err = -ENOMEM;
++ EPRINTK("%s: Failed to allocate rx buffers\n", __FUNCTION__);
++ goto fail_rx_bufs;
++ }
++
++ /*
++ * This allocates two pages, one for the shared page and one
++ * for the message queue.
++ */
++ vnic->shared_page = (struct net_accel_shared_page *)
++ __get_free_pages(GFP_KERNEL, 1);
++ if (vnic->shared_page == NULL) {
++ EPRINTK("%s: no memory for shared pages\n", __FUNCTION__);
++ err = -ENOMEM;
++ goto fail_shared_page;
++ }
++
++ net_accel_msg_init_queue
++ (&vnic->from_dom0, &vnic->shared_page->queue0,
++ (struct net_accel_msg *)((u8*)vnic->shared_page + PAGE_SIZE),
++ msgs_per_queue);
++
++ net_accel_msg_init_queue
++ (&vnic->to_dom0, &vnic->shared_page->queue1,
++ (struct net_accel_msg *)((u8*)vnic->shared_page +
++ (3 * PAGE_SIZE / 2)),
++ msgs_per_queue);
++
++ vnic->msg_state = NETFRONT_ACCEL_MSG_NONE;
++
++ err = make_named_grant(dev, vnic->shared_page, "accel-ctrl-page",
++ &vnic->ctrl_page_gnt);
++ if (err) {
++ EPRINTK("couldn't make ctrl-page named grant\n");
++ goto fail_ctrl_page_grant;
++ }
++
++ err = make_named_grant(dev, (u8*)vnic->shared_page + PAGE_SIZE,
++ "accel-msg-page", &vnic->msg_page_gnt);
++ if (err) {
++ EPRINTK("couldn't make msg-page named grant\n");
++ goto fail_msg_page_grant;
++ }
++
++ /* Create xenbus msg event channel */
++ err = bind_listening_port_to_irqhandler
++ (dev->otherend_id, netfront_accel_msg_channel_irq_from_bend,
++ SA_SAMPLE_RANDOM, "vnicctrl", vnic);
++ if (err < 0) {
++ EPRINTK("Couldn't bind msg event channel\n");
++ goto fail_msg_irq;
++ }
++ vnic->msg_channel_irq = err;
++ vnic->msg_channel = irq_to_evtchn_port(vnic->msg_channel_irq);
++
++ /* Create xenbus net event channel */
++ err = bind_listening_port_to_irqhandler
++ (dev->otherend_id, netfront_accel_net_channel_irq_from_bend,
++ SA_SAMPLE_RANDOM, "vnicfront", vnic);
++ if (err < 0) {
++ EPRINTK("Couldn't bind net event channel\n");
++ goto fail_net_irq;
++ }
++ vnic->net_channel_irq = err;
++ vnic->net_channel = irq_to_evtchn_port(vnic->net_channel_irq);
++ /* Want to ensure we don't get interrupts before we're ready */
++ netfront_accel_disable_net_interrupts(vnic);
++
++ DPRINTK("otherend %d has msg ch %u (%u) and net ch %u (%u)\n",
++ dev->otherend_id, vnic->msg_channel, vnic->msg_channel_irq,
++ vnic->net_channel, vnic->net_channel_irq);
++
++ do {
++ err = xenbus_transaction_start(&tr);
++ if (err != 0) {
++ EPRINTK("%s: Transaction start failed %d\n",
++ __FUNCTION__, err);
++ goto fail_transaction;
++ }
++
++ err = xenbus_printf(tr, dev->nodename, "accel-msg-channel",
++ "%u", vnic->msg_channel);
++ if (err != 0) {
++ EPRINTK("%s: event channel xenbus write failed %d\n",
++ __FUNCTION__, err);
++ xenbus_transaction_end(tr, 1);
++ goto fail_transaction;
++ }
++
++ err = xenbus_printf(tr, dev->nodename, "accel-net-channel",
++ "%u", vnic->net_channel);
++ if (err != 0) {
++ EPRINTK("%s: net channel xenbus write failed %d\n",
++ __FUNCTION__, err);
++ xenbus_transaction_end(tr, 1);
++ goto fail_transaction;
++ }
++
++ err = xenbus_transaction_end(tr, 0);
++ } while (err == -EAGAIN);
++
++ if (err != 0) {
++ EPRINTK("%s: Transaction end failed %d\n", __FUNCTION__, err);
++ goto fail_transaction;
++ }
++
++ DPRINTK("Completed setting up domU shared state\n");
++
++ return 0;
++
++fail_transaction:
++
++ unbind_from_irqhandler(vnic->net_channel_irq, vnic);
++fail_net_irq:
++
++ unbind_from_irqhandler(vnic->msg_channel_irq, vnic);
++fail_msg_irq:
++
++ remove_named_grant(dev, "accel-ctrl-page", vnic->ctrl_page_gnt);
++fail_msg_page_grant:
++
++ remove_named_grant(dev, "accel-msg-page", vnic->msg_page_gnt);
++fail_ctrl_page_grant:
++
++ free_pages((unsigned long)vnic->shared_page, 1);
++ vnic->shared_page = NULL;
++fail_shared_page:
++
++ netfront_accel_fini_bufs(vnic->rx_bufs);
++fail_rx_bufs:
++
++ netfront_accel_fini_bufs(vnic->tx_bufs);
++fail_tx_bufs:
++
++ /* Undo the memory allocation created when we got the HELLO */
++ netfront_accel_free_buffer_mem(&vnic->bufpages,
++ vnic->rx_bufs,
++ vnic->tx_bufs);
++
++ DPRINTK("Failed to setup domU shared state with code %d\n", err);
++
++ return err;
++}
++
++
++static void vnic_remove_domU_shared_state(struct xenbus_device *dev,
++ netfront_accel_vnic *vnic)
++{
++ struct xenbus_transaction tr;
++
++ /*
++ * Don't remove any watches because we currently hold the
++ * mutex and the watches take the mutex.
++ */
++
++ DPRINTK("%s: removing event channel irq handlers %d %d\n",
++ __FUNCTION__, vnic->net_channel_irq, vnic->msg_channel_irq);
++ do {
++ if (xenbus_transaction_start(&tr) != 0)
++ break;
++ xenbus_rm(tr, dev->nodename, "accel-msg-channel");
++ xenbus_rm(tr, dev->nodename, "accel-net-channel");
++ } while (xenbus_transaction_end(tr, 0) == -EAGAIN);
++
++ unbind_from_irqhandler(vnic->net_channel_irq, vnic);
++ unbind_from_irqhandler(vnic->msg_channel_irq, vnic);
++
++ /* ungrant pages for msg channel */
++ remove_named_grant(dev, "accel-ctrl-page", vnic->ctrl_page_gnt);
++ remove_named_grant(dev, "accel-msg-page", vnic->msg_page_gnt);
++ free_pages((unsigned long)vnic->shared_page, 1);
++ vnic->shared_page = NULL;
++
++ /* ungrant pages for buffers, and free buffer memory */
++ netfront_accel_free_buffer_mem(&vnic->bufpages,
++ vnic->rx_bufs,
++ vnic->tx_bufs);
++ netfront_accel_fini_bufs(vnic->rx_bufs);
++ netfront_accel_fini_bufs(vnic->tx_bufs);
++}
++
++
++static void vnic_setup_dom0_shared_state(struct xenbus_device *dev,
++ netfront_accel_vnic *vnic)
++{
++ DPRINTK("Setting up dom0 shared state\n");
++
++ netfront_accel_vi_ctor(vnic);
++
++ /*
++ * Message processing will be enabled when this function
++ * returns, but we might have missed an interrupt. Schedule a
++ * check just in case.
++ */
++ queue_work(netfront_accel_workqueue, &vnic->msg_from_bend);
++}
++
++
++static void vnic_remove_dom0_shared_state(struct xenbus_device *dev,
++ netfront_accel_vnic *vnic)
++{
++ DPRINTK("Removing dom0 shared state\n");
++
++ vnic_stop_fastpath(vnic);
++
++ netfront_accel_vi_dtor(vnic);
++}
++
++
++/*************************************************************************/
++
++/*
++ * The following code handles accelstate changes between the frontend
++ * and the backend. In response to transitions, calls the following
++ * functions in matching pairs:
++ *
++ * vnic_setup_domU_shared_state
++ * vnic_remove_domU_shared_state
++ *
++ * vnic_setup_dom0_shared_state
++ * vnic_remove_dom0_shared_state
++ *
++ * Valid state transitions for DomU are as follows:
++ *
++ * Closed->Init on probe or in response to Init from dom0
++ *
++ * Init->Connected in response to Init from dom0
++ * Init->Closing on error providing dom0 is in Init
++ * Init->Closed on remove or in response to Closing from dom0
++ *
++ * Connected->Closing on error/remove
++ * Connected->Closed in response to Closing from dom0
++ *
++ * Closing->Closed in response to Closing from dom0
++ *
++ */
++
++
++/* Function to deal with Xenbus accel state change in backend */
++static void netfront_accel_backend_accel_changed(netfront_accel_vnic *vnic,
++ XenbusState backend_state)
++{
++ struct xenbus_device *dev = vnic->dev;
++ XenbusState frontend_state;
++ int state;
++
++ DPRINTK("%s: changing from %s to %s. nodename %s, otherend %s\n",
++ __FUNCTION__, xenbus_strstate(vnic->backend_state),
++ xenbus_strstate(backend_state), dev->nodename, dev->otherend);
++
++ /*
++ * Ignore duplicate state changes. This can happen if the
++ * backend changes state twice in quick succession and the
++ * first watch fires in the frontend after the second
++ * transition has completed.
++ */
++ if (vnic->backend_state == backend_state)
++ return;
++
++ vnic->backend_state = backend_state;
++ frontend_state = vnic->frontend_state;
++
++ switch (backend_state) {
++ case XenbusStateInitialising:
++ /*
++ * It's possible for us to miss the closed state from
++ * dom0, so do the work here.
++ */
++ if (vnic->domU_state_is_setup) {
++ vnic_remove_domU_shared_state(dev, vnic);
++ vnic->domU_state_is_setup = 0;
++ }
++
++ if (frontend_state != XenbusStateInitialising) {
++ /* Make sure the backend doesn't go away. */
++ frontend_state = XenbusStateInitialising;
++ net_accel_update_state(dev, frontend_state);
++ xenbus_scanf(XBT_NIL, dev->otherend, "accelstate", "%d", &state);
++ backend_state = (XenbusState)state;
++ if (backend_state != XenbusStateInitialising)
++ break;
++ }
++
++ /* Start the new connection. */
++ if (!vnic->removing) {
++ BUG_ON(vnic->domU_state_is_setup);
++ if (vnic_setup_domU_shared_state(dev, vnic) == 0) {
++ vnic->domU_state_is_setup = 1;
++ frontend_state = XenbusStateConnected;
++ } else
++ frontend_state = XenbusStateClosing;
++ }
++ break;
++ case XenbusStateConnected:
++ if (vnic->domU_state_is_setup &&
++ !vnic->dom0_state_is_setup) {
++ vnic_setup_dom0_shared_state(dev, vnic);
++ vnic->dom0_state_is_setup = 1;
++ }
++ break;
++ default:
++ case XenbusStateClosing:
++ if (vnic->dom0_state_is_setup) {
++ vnic_remove_dom0_shared_state(dev, vnic);
++ vnic->dom0_state_is_setup = 0;
++ }
++ frontend_state = XenbusStateClosed;
++ break;
++ case XenbusStateUnknown:
++ case XenbusStateClosed:
++ if (vnic->domU_state_is_setup) {
++ vnic_remove_domU_shared_state(dev, vnic);
++ vnic->domU_state_is_setup = 0;
++ }
++ break;
++ }
++
++ if (frontend_state != vnic->frontend_state) {
++ DPRINTK("Switching from state %s (%d) to %s (%d)\n",
++ xenbus_strstate(vnic->frontend_state),
++ vnic->frontend_state,
++ xenbus_strstate(frontend_state), frontend_state);
++ vnic->frontend_state = frontend_state;
++ net_accel_update_state(dev, frontend_state);
++ }
++
++ wake_up(&vnic->state_wait_queue);
++}
++
++
++static void backend_accel_state_change(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ int state;
++ netfront_accel_vnic *vnic;
++ struct xenbus_device *dev;
++
++ DPRINTK("%s\n", __FUNCTION__);
++
++ vnic = container_of(watch, struct netfront_accel_vnic,
++ backend_accel_watch);
++
++ mutex_lock(&vnic->vnic_mutex);
++
++ dev = vnic->dev;
++
++ state = (int)XenbusStateUnknown;
++ xenbus_scanf(XBT_NIL, dev->otherend, "accelstate", "%d", &state);
++ netfront_accel_backend_accel_changed(vnic, state);
++
++ mutex_unlock(&vnic->vnic_mutex);
++}
++
++
++static int setup_dom0_accel_watch(struct xenbus_device *dev,
++ netfront_accel_vnic *vnic)
++{
++ int err;
++
++ DPRINTK("Setting watch on %s/%s\n", dev->otherend, "accelstate");
++
++ err = xenbus_watch_path2(dev, dev->otherend, "accelstate",
++ &vnic->backend_accel_watch,
++ backend_accel_state_change);
++ if (err) {
++ EPRINTK("%s: Failed to register xenbus watch: %d\n",
++ __FUNCTION__, err);
++ goto fail;
++ }
++ return 0;
++ fail:
++ vnic->backend_accel_watch.node = NULL;
++ return err;
++}
++
++
++int netfront_accel_probe(struct net_device *net_dev, struct xenbus_device *dev)
++{
++ netfront_accel_vnic *vnic;
++ int err;
++
++ DPRINTK("Probe passed device %s\n", dev->nodename);
++
++ vnic = netfront_accel_vnic_ctor(net_dev, dev);
++ if (IS_ERR(vnic))
++ return PTR_ERR(vnic);
++
++ /*
++ * Setup a watch on the backend accel state. This sets things
++ * going.
++ */
++ err = setup_dom0_accel_watch(dev, vnic);
++ if (err) {
++ netfront_accel_vnic_dtor(vnic);
++ EPRINTK("%s: probe failed with code %d\n", __FUNCTION__, err);
++ return err;
++ }
++
++ /*
++ * Indicate to the other end that we're ready to start unless
++ * the watch has already fired.
++ */
++ mutex_lock(&vnic->vnic_mutex);
++ VPRINTK("setup success, updating accelstate\n");
++ if (vnic->frontend_state == XenbusStateClosed) {
++ vnic->frontend_state = XenbusStateInitialising;
++ net_accel_update_state(dev, XenbusStateInitialising);
++ }
++ mutex_unlock(&vnic->vnic_mutex);
++
++ DPRINTK("Probe done device %s\n", dev->nodename);
++
++ return 0;
++}
++
++
++int netfront_accel_remove(struct xenbus_device *dev)
++{
++ struct netfront_info *np =
++ (struct netfront_info *)dev->dev.driver_data;
++ netfront_accel_vnic *vnic = (netfront_accel_vnic *)np->accel_priv;
++
++ DPRINTK("%s %s\n", __FUNCTION__, dev->nodename);
++
++ BUG_ON(vnic == NULL);
++
++ mutex_lock(&vnic->vnic_mutex);
++
++ /* Reject any attempts to connect. */
++ vnic->removing = 1;
++
++ /* Close any existing connection. */
++ if (vnic->frontend_state == XenbusStateConnected) {
++ vnic->frontend_state = XenbusStateClosing;
++ net_accel_update_state(dev, XenbusStateClosing);
++ }
++
++ mutex_unlock(&vnic->vnic_mutex);
++
++ DPRINTK("%s waiting for release of %s\n", __FUNCTION__, dev->nodename);
++
++ /*
++ * Wait for the xenbus watch to release the shared resources.
++ * This indicates that dom0 has made the transition
++ * Closing->Closed or that dom0 was in Closed or Init and no
++ * resources were mapped.
++ */
++ wait_event(vnic->state_wait_queue,
++ !vnic->domU_state_is_setup);
++
++ /*
++ * Now we don't need this watch anymore it is safe to remove
++ * it (and so synchronise with it completing if outstanding)
++ */
++ DPRINTK("%s: unregistering xenbus accel watch\n",
++ __FUNCTION__);
++ unregister_xenbus_watch(&vnic->backend_accel_watch);
++ kfree(vnic->backend_accel_watch.node);
++
++ netfront_accel_vnic_dtor(vnic);
++
++ DPRINTK("%s done %s\n", __FUNCTION__, dev->nodename);
++
++ return 0;
++}
+Index: head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_falcon.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_falcon.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,172 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author slp
++ * \brief Falcon specific definitions
++ * \date 2004/08
++ */
++
++#ifndef __EF_VI_FALCON_H__
++#define __EF_VI_FALCON_H__
++
++#define EFHW_4K 0x00001000u
++#define EFHW_8K 0x00002000u
++
++/* include the autogenerated register definitions */
++
++#include "ef_vi_falcon_core.h"
++#include "ef_vi_falcon_desc.h"
++#include "ef_vi_falcon_event.h"
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Helpers to turn bit shifts into dword shifts and check that the bit fields
++ * haven't overflown the dword etc. Aim is to preserve consistency with the
++ * autogenerated headers - once stable we could hard code.
++ *
++ *---------------------------------------------------------------------------*/
++
++/* mask constructors */
++#define __FALCON_MASK(WIDTH,T) ((((T)1) << (WIDTH)) - 1)
++#define __EFVI_MASK32(WIDTH) __FALCON_MASK((WIDTH),uint32_t)
++#define __EFVI_MASK64(WIDTH) __FALCON_MASK((WIDTH),uint64_t)
++
++#define __EFVI_FALCON_MASKFIELD32(LBN, WIDTH) ((uint32_t) \
++ (__EFVI_MASK32(WIDTH) << (LBN)))
++
++/* constructors for fields which span the first and second dwords */
++#define __LW(LBN) (32 - LBN)
++#define LOW(v, LBN, WIDTH) ((uint32_t) \
++ (((v) & __EFVI_MASK64(__LW((LBN)))) << (LBN)))
++#define HIGH(v, LBN, WIDTH) ((uint32_t)(((v) >> __LW((LBN))) & \
++ __EFVI_MASK64((WIDTH - __LW((LBN))))))
++/* constructors for fields within the second dword */
++#define __DW2(LBN) ((LBN) - 32)
++
++/* constructors for fields which span the second and third dwords */
++#define __LW2(LBN) (64 - LBN)
++#define LOW2(v, LBN, WIDTH) ((uint32_t) \
++ (((v) & __EFVI_MASK64(__LW2((LBN)))) << ((LBN) - 32)))
++#define HIGH2(v, LBN, WIDTH) ((uint32_t) \
++ (((v) >> __LW2((LBN))) & __EFVI_MASK64((WIDTH - __LW2((LBN))))))
++
++/* constructors for fields within the third dword */
++#define __DW3(LBN) ((LBN) - 64)
++
++
++/* constructors for fields which span the third and fourth dwords */
++#define __LW3(LBN) (96 - LBN)
++#define LOW3(v, LBN, WIDTH) ((uint32_t) \
++ (((v) & __EFVI_MASK64(__LW3((LBN)))) << ((LBN) - 64)))
++#define HIGH3(v, LBN, WIDTH) ((unit32_t) \
++ (((v) >> __LW3((LBN))) & __EFVI_MASK64((WIDTH - __LW3((LBN))))))
++
++/* constructors for fields within the fourth dword */
++#define __DW4(LBN) ((LBN) - 96)
++
++/* checks that the autogenerated headers our consistent with our model */
++#define WIDTHCHCK(a, b) ef_assert((a) == (b))
++#define RANGECHCK(v, WIDTH) \
++ ef_assert(((uint64_t)(v) & ~(__EFVI_MASK64((WIDTH)))) == 0)
++
++/* fields within the first dword */
++#define DWCHCK(LBN, WIDTH) ef_assert(((LBN) >= 0) &&(((LBN)+(WIDTH)) <= 32))
++
++/* fields which span the first and second dwords */
++#define LWCHK(LBN, WIDTH) ef_assert(WIDTH >= __LW(LBN))
++
++/*----------------------------------------------------------------------------
++ *
++ * Buffer virtual addresses (4K buffers)
++ *
++ *---------------------------------------------------------------------------*/
++
++/* Form a buffer virtual address from buffer ID and offset. If the offset
++** is larger than the buffer size, then the buffer indexed will be
++** calculated appropriately. It is the responsibility of the caller to
++** ensure that they have valid buffers programmed at that address.
++*/
++#define EFVI_FALCON_VADDR_4K_S (12)
++#define EFVI_FALCON_VADDR_M 0xfffff /* post shift mask */
++
++
++#define EFVI_FALCON_BUFFER_4K_ADDR(id,off) \
++ (((id) << EFVI_FALCON_VADDR_4K_S) + (off))
++
++#define EFVI_FALCON_BUFFER_4K_PAGE(vaddr) \
++ (((vaddr) >> EFVI_FALCON_VADDR_4K_S) & EFVI_FALCON_VADDR_M)
++
++#define EFVI_FALCON_BUFFER_4K_OFF(vaddr) \
++ ((vaddr) & __EFVI_MASK32(EFVI_FALCON_VADDR_4K_S))
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Masks
++ *
++ *---------------------------------------------------------------------------*/
++
++#define EFVI_FALCON_CLOCK_ASIC_HZ (125000)
++#define EFVI_FALCON_CLOCK_FPGA_HZ (62500)
++#define EFVI_FALCON_CLOCK_HZ EFVI_FALCON_CLOCK_ASIC_HZ
++
++
++/*----------------------------------------------------------------------------
++ *
++ * Timers
++ *
++ *---------------------------------------------------------------------------*/
++
++/* Event-Queue Timer granularity - measured in us
++ Given by: 4096 * 3 cycle * clock period */
++
++#define EFVI_FALCON_EVQTIMER_PERIOD_US ((4096 * 3 * 1000) / EFVI_FALCON_CLOCK_HZ)
++
++/* mode bits */
++#define EFVI_FALCON_TIMER_MODE_DIS 0 /* disabled */
++#define EFVI_FALCON_TIMER_MODE_RUN 1 /* started counting right away */
++#define EFVI_FALCON_TIMER_MODE_HOLD 2 /* trigger mode (user queues) */
++
++#define EFVI_FALCON_EVQTIMER_HOLD (EFVI_FALCON_TIMER_MODE_HOLD << TIMER_MODE_LBN)
++#define EFVI_FALCON_EVQTIMER_RUN (EFVI_FALCON_TIMER_MODE_RUN << TIMER_MODE_LBN)
++#define EFVI_FALCON_EVQTIMER_DISABLE (EFVI_FALCON_TIMER_MODE_DIS << TIMER_MODE_LBN)
++
++
++/* ---- efhw_event_t helpers --- */
++
++#define EFVI_FALCON_EVENT_CODE(evp) \
++ ((evp)->u64 & EFVI_FALCON_EVENT_CODE_MASK)
++
++#define EFVI_FALCON_EVENT_SW_DATA_MASK 0x0000ffff
++
++#define __EFVI_FALCON_OPEN_MASK(WIDTH) ((((uint64_t)1) << (WIDTH)) - 1)
++
++#define EFVI_FALCON_EVENT_CODE_MASK \
++ (__EFVI_FALCON_OPEN_MASK(EV_CODE_WIDTH) << EV_CODE_LBN)
++
++
++#endif /* __EF_VI_FALCON_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_falcon_core.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_falcon_core.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,1075 @@
++
++#define EFVI_FALCON_EXTENDED_P_BAR 1
++
++//////////////---- Bus Interface Unit Registers C Header ----//////////////
++#define IOM_IND_ADR_REG_OFST 0x0 // IO-mapped indirect access address register
++ #define IOM_AUTO_ADR_INC_EN_LBN 16
++ #define IOM_AUTO_ADR_INC_EN_WIDTH 1
++ #define IOM_IND_ADR_LBN 0
++ #define IOM_IND_ADR_WIDTH 16
++#define IOM_IND_DAT_REG_OFST 0x4 // IO-mapped indirect access data register
++ #define IOM_IND_DAT_LBN 0
++ #define IOM_IND_DAT_WIDTH 32
++#define ADR_REGION_REG_KER_OFST 0x0 // Address region register
++#define ADR_REGION_REG_OFST 0x0 // Address region register
++ #define ADR_REGION3_LBN 96
++ #define ADR_REGION3_WIDTH 18
++ #define ADR_REGION2_LBN 64
++ #define ADR_REGION2_WIDTH 18
++ #define ADR_REGION1_LBN 32
++ #define ADR_REGION1_WIDTH 18
++ #define ADR_REGION0_LBN 0
++ #define ADR_REGION0_WIDTH 18
++#define INT_EN_REG_KER_OFST 0x10 // Kernel driver Interrupt enable register
++ #define KER_INT_CHAR_LBN 4
++ #define KER_INT_CHAR_WIDTH 1
++ #define KER_INT_KER_LBN 3
++ #define KER_INT_KER_WIDTH 1
++ #define ILL_ADR_ERR_INT_EN_KER_LBN 2
++ #define ILL_ADR_ERR_INT_EN_KER_WIDTH 1
++ #define SRM_PERR_INT_EN_KER_LBN 1
++ #define SRM_PERR_INT_EN_KER_WIDTH 1
++ #define DRV_INT_EN_KER_LBN 0
++ #define DRV_INT_EN_KER_WIDTH 1
++#define INT_EN_REG_CHAR_OFST 0x20 // Char Driver interrupt enable register
++ #define CHAR_INT_CHAR_LBN 4
++ #define CHAR_INT_CHAR_WIDTH 1
++ #define CHAR_INT_KER_LBN 3
++ #define CHAR_INT_KER_WIDTH 1
++ #define ILL_ADR_ERR_INT_EN_CHAR_LBN 2
++ #define ILL_ADR_ERR_INT_EN_CHAR_WIDTH 1
++ #define SRM_PERR_INT_EN_CHAR_LBN 1
++ #define SRM_PERR_INT_EN_CHAR_WIDTH 1
++ #define DRV_INT_EN_CHAR_LBN 0
++ #define DRV_INT_EN_CHAR_WIDTH 1
++#define INT_ADR_REG_KER_OFST 0x30 // Interrupt host address for Kernel driver
++ #define INT_ADR_KER_LBN 0
++ #define INT_ADR_KER_WIDTH 64
++ #define DRV_INT_KER_LBN 32
++ #define DRV_INT_KER_WIDTH 1
++ #define EV_FF_HALF_INT_KER_LBN 3
++ #define EV_FF_HALF_INT_KER_WIDTH 1
++ #define EV_FF_FULL_INT_KER_LBN 2
++ #define EV_FF_FULL_INT_KER_WIDTH 1
++ #define ILL_ADR_ERR_INT_KER_LBN 1
++ #define ILL_ADR_ERR_INT_KER_WIDTH 1
++ #define SRAM_PERR_INT_KER_LBN 0
++ #define SRAM_PERR_INT_KER_WIDTH 1
++#define INT_ADR_REG_CHAR_OFST 0x40 // Interrupt host address for Char driver
++ #define INT_ADR_CHAR_LBN 0
++ #define INT_ADR_CHAR_WIDTH 64
++ #define DRV_INT_CHAR_LBN 32
++ #define DRV_INT_CHAR_WIDTH 1
++ #define EV_FF_HALF_INT_CHAR_LBN 3
++ #define EV_FF_HALF_INT_CHAR_WIDTH 1
++ #define EV_FF_FULL_INT_CHAR_LBN 2
++ #define EV_FF_FULL_INT_CHAR_WIDTH 1
++ #define ILL_ADR_ERR_INT_CHAR_LBN 1
++ #define ILL_ADR_ERR_INT_CHAR_WIDTH 1
++ #define SRAM_PERR_INT_CHAR_LBN 0
++ #define SRAM_PERR_INT_CHAR_WIDTH 1
++#define INT_ISR0_B0_OFST 0x90 // B0 only
++#define INT_ISR1_B0_OFST 0xA0
++#define INT_ACK_REG_KER_A1_OFST 0x50 // Kernel interrupt acknowledge register
++ #define RESERVED_LBN 0
++ #define RESERVED_WIDTH 32
++#define INT_ACK_REG_CHAR_A1_OFST 0x60 // CHAR interrupt acknowledge register
++ #define RESERVED_LBN 0
++ #define RESERVED_WIDTH 32
++//////////////---- Global CSR Registers C Header ----//////////////
++#define STRAP_REG_KER_OFST 0x200 // ASIC strap status register
++#define STRAP_REG_OFST 0x200 // ASIC strap status register
++ #define ONCHIP_SRAM_LBN 16
++ #define ONCHIP_SRAM_WIDTH 0
++ #define STRAP_ISCSI_EN_LBN 3
++ #define STRAP_ISCSI_EN_WIDTH 1
++ #define STRAP_PINS_LBN 0
++ #define STRAP_PINS_WIDTH 3
++#define GPIO_CTL_REG_KER_OFST 0x210 // GPIO control register
++#define GPIO_CTL_REG_OFST 0x210 // GPIO control register
++ #define GPIO_OEN_LBN 24
++ #define GPIO_OEN_WIDTH 4
++ #define GPIO_OUT_LBN 16
++ #define GPIO_OUT_WIDTH 4
++ #define GPIO_IN_LBN 8
++ #define GPIO_IN_WIDTH 4
++ #define GPIO_PWRUP_VALUE_LBN 0
++ #define GPIO_PWRUP_VALUE_WIDTH 4
++#define GLB_CTL_REG_KER_OFST 0x220 // Global control register
++#define GLB_CTL_REG_OFST 0x220 // Global control register
++ #define SWRST_LBN 0
++ #define SWRST_WIDTH 1
++#define FATAL_INTR_REG_KER_OFST 0x230 // Fatal interrupt register for Kernel
++ #define PCI_BUSERR_INT_KER_EN_LBN 43
++ #define PCI_BUSERR_INT_KER_EN_WIDTH 1
++ #define SRAM_OOB_INT_KER_EN_LBN 42
++ #define SRAM_OOB_INT_KER_EN_WIDTH 1
++ #define BUFID_OOB_INT_KER_EN_LBN 41
++ #define BUFID_OOB_INT_KER_EN_WIDTH 1
++ #define MEM_PERR_INT_KER_EN_LBN 40
++ #define MEM_PERR_INT_KER_EN_WIDTH 1
++ #define RBUF_OWN_INT_KER_EN_LBN 39
++ #define RBUF_OWN_INT_KER_EN_WIDTH 1
++ #define TBUF_OWN_INT_KER_EN_LBN 38
++ #define TBUF_OWN_INT_KER_EN_WIDTH 1
++ #define RDESCQ_OWN_INT_KER_EN_LBN 37
++ #define RDESCQ_OWN_INT_KER_EN_WIDTH 1
++ #define TDESCQ_OWN_INT_KER_EN_LBN 36
++ #define TDESCQ_OWN_INT_KER_EN_WIDTH 1
++ #define EVQ_OWN_INT_KER_EN_LBN 35
++ #define EVQ_OWN_INT_KER_EN_WIDTH 1
++ #define EVFF_OFLO_INT_KER_EN_LBN 34
++ #define EVFF_OFLO_INT_KER_EN_WIDTH 1
++ #define ILL_ADR_INT_KER_EN_LBN 33
++ #define ILL_ADR_INT_KER_EN_WIDTH 1
++ #define SRM_PERR_INT_KER_EN_LBN 32
++ #define SRM_PERR_INT_KER_EN_WIDTH 1
++ #define PCI_BUSERR_INT_KER_LBN 11
++ #define PCI_BUSERR_INT_KER_WIDTH 1
++ #define SRAM_OOB_INT_KER_LBN 10
++ #define SRAM_OOB_INT_KER_WIDTH 1
++ #define BUFID_OOB_INT_KER_LBN 9
++ #define BUFID_OOB_INT_KER_WIDTH 1
++ #define MEM_PERR_INT_KER_LBN 8
++ #define MEM_PERR_INT_KER_WIDTH 1
++ #define RBUF_OWN_INT_KER_LBN 7
++ #define RBUF_OWN_INT_KER_WIDTH 1
++ #define TBUF_OWN_INT_KER_LBN 6
++ #define TBUF_OWN_INT_KER_WIDTH 1
++ #define RDESCQ_OWN_INT_KER_LBN 5
++ #define RDESCQ_OWN_INT_KER_WIDTH 1
++ #define TDESCQ_OWN_INT_KER_LBN 4
++ #define TDESCQ_OWN_INT_KER_WIDTH 1
++ #define EVQ_OWN_INT_KER_LBN 3
++ #define EVQ_OWN_INT_KER_WIDTH 1
++ #define EVFF_OFLO_INT_KER_LBN 2
++ #define EVFF_OFLO_INT_KER_WIDTH 1
++ #define ILL_ADR_INT_KER_LBN 1
++ #define ILL_ADR_INT_KER_WIDTH 1
++ #define SRM_PERR_INT_KER_LBN 0
++ #define SRM_PERR_INT_KER_WIDTH 1
++#define FATAL_INTR_REG_OFST 0x240 // Fatal interrupt register for Char
++ #define PCI_BUSERR_INT_CHAR_EN_LBN 43
++ #define PCI_BUSERR_INT_CHAR_EN_WIDTH 1
++ #define SRAM_OOB_INT_CHAR_EN_LBN 42
++ #define SRAM_OOB_INT_CHAR_EN_WIDTH 1
++ #define BUFID_OOB_INT_CHAR_EN_LBN 41
++ #define BUFID_OOB_INT_CHAR_EN_WIDTH 1
++ #define MEM_PERR_INT_CHAR_EN_LBN 40
++ #define MEM_PERR_INT_CHAR_EN_WIDTH 1
++ #define RBUF_OWN_INT_CHAR_EN_LBN 39
++ #define RBUF_OWN_INT_CHAR_EN_WIDTH 1
++ #define TBUF_OWN_INT_CHAR_EN_LBN 38
++ #define TBUF_OWN_INT_CHAR_EN_WIDTH 1
++ #define RDESCQ_OWN_INT_CHAR_EN_LBN 37
++ #define RDESCQ_OWN_INT_CHAR_EN_WIDTH 1
++ #define TDESCQ_OWN_INT_CHAR_EN_LBN 36
++ #define TDESCQ_OWN_INT_CHAR_EN_WIDTH 1
++ #define EVQ_OWN_INT_CHAR_EN_LBN 35
++ #define EVQ_OWN_INT_CHAR_EN_WIDTH 1
++ #define EVFF_OFLO_INT_CHAR_EN_LBN 34
++ #define EVFF_OFLO_INT_CHAR_EN_WIDTH 1
++ #define ILL_ADR_INT_CHAR_EN_LBN 33
++ #define ILL_ADR_INT_CHAR_EN_WIDTH 1
++ #define SRM_PERR_INT_CHAR_EN_LBN 32
++ #define SRM_PERR_INT_CHAR_EN_WIDTH 1
++ #define FATAL_INTR_REG_EN_BITS 0xffffffffffffffffULL
++ #define PCI_BUSERR_INT_CHAR_LBN 11
++ #define PCI_BUSERR_INT_CHAR_WIDTH 1
++ #define SRAM_OOB_INT_CHAR_LBN 10
++ #define SRAM_OOB_INT_CHAR_WIDTH 1
++ #define BUFID_OOB_INT_CHAR_LBN 9
++ #define BUFID_OOB_INT_CHAR_WIDTH 1
++ #define MEM_PERR_INT_CHAR_LBN 8
++ #define MEM_PERR_INT_CHAR_WIDTH 1
++ #define RBUF_OWN_INT_CHAR_LBN 7
++ #define RBUF_OWN_INT_CHAR_WIDTH 1
++ #define TBUF_OWN_INT_CHAR_LBN 6
++ #define TBUF_OWN_INT_CHAR_WIDTH 1
++ #define RDESCQ_OWN_INT_CHAR_LBN 5
++ #define RDESCQ_OWN_INT_CHAR_WIDTH 1
++ #define TDESCQ_OWN_INT_CHAR_LBN 4
++ #define TDESCQ_OWN_INT_CHAR_WIDTH 1
++ #define EVQ_OWN_INT_CHAR_LBN 3
++ #define EVQ_OWN_INT_CHAR_WIDTH 1
++ #define EVFF_OFLO_INT_CHAR_LBN 2
++ #define EVFF_OFLO_INT_CHAR_WIDTH 1
++ #define ILL_ADR_INT_CHAR_LBN 1
++ #define ILL_ADR_INT_CHAR_WIDTH 1
++ #define SRM_PERR_INT_CHAR_LBN 0
++ #define SRM_PERR_INT_CHAR_WIDTH 1
++#define DP_CTRL_REG_OFST 0x250 // Datapath control register
++ #define FLS_EVQ_ID_LBN 0
++ #define FLS_EVQ_ID_WIDTH 12
++#define MEM_STAT_REG_KER_OFST 0x260 // Memory status register
++#define MEM_STAT_REG_OFST 0x260 // Memory status register
++ #define MEM_PERR_VEC_LBN 53
++ #define MEM_PERR_VEC_WIDTH 38
++ #define MBIST_CORR_LBN 38
++ #define MBIST_CORR_WIDTH 15
++ #define MBIST_ERR_LBN 0
++ #define MBIST_ERR_WIDTH 38
++#define DEBUG_REG_KER_OFST 0x270 // Debug register
++#define DEBUG_REG_OFST 0x270 // Debug register
++ #define DEBUG_BLK_SEL2_LBN 47
++ #define DEBUG_BLK_SEL2_WIDTH 3
++ #define DEBUG_BLK_SEL1_LBN 44
++ #define DEBUG_BLK_SEL1_WIDTH 3
++ #define DEBUG_BLK_SEL0_LBN 41
++ #define DEBUG_BLK_SEL0_WIDTH 3
++ #define MISC_DEBUG_ADDR_LBN 36
++ #define MISC_DEBUG_ADDR_WIDTH 5
++ #define SERDES_DEBUG_ADDR_LBN 31
++ #define SERDES_DEBUG_ADDR_WIDTH 5
++ #define EM_DEBUG_ADDR_LBN 26
++ #define EM_DEBUG_ADDR_WIDTH 5
++ #define SR_DEBUG_ADDR_LBN 21
++ #define SR_DEBUG_ADDR_WIDTH 5
++ #define EV_DEBUG_ADDR_LBN 16
++ #define EV_DEBUG_ADDR_WIDTH 5
++ #define RX_DEBUG_ADDR_LBN 11
++ #define RX_DEBUG_ADDR_WIDTH 5
++ #define TX_DEBUG_ADDR_LBN 6
++ #define TX_DEBUG_ADDR_WIDTH 5
++ #define BIU_DEBUG_ADDR_LBN 1
++ #define BIU_DEBUG_ADDR_WIDTH 5
++ #define DEBUG_EN_LBN 0
++ #define DEBUG_EN_WIDTH 1
++#define DRIVER_REG0_KER_OFST 0x280 // Driver scratch register 0
++#define DRIVER_REG0_OFST 0x280 // Driver scratch register 0
++ #define DRIVER_DW0_LBN 0
++ #define DRIVER_DW0_WIDTH 32
++#define DRIVER_REG1_KER_OFST 0x290 // Driver scratch register 1
++#define DRIVER_REG1_OFST 0x290 // Driver scratch register 1
++ #define DRIVER_DW1_LBN 0
++ #define DRIVER_DW1_WIDTH 32
++#define DRIVER_REG2_KER_OFST 0x2A0 // Driver scratch register 2
++#define DRIVER_REG2_OFST 0x2A0 // Driver scratch register 2
++ #define DRIVER_DW2_LBN 0
++ #define DRIVER_DW2_WIDTH 32
++#define DRIVER_REG3_KER_OFST 0x2B0 // Driver scratch register 3
++#define DRIVER_REG3_OFST 0x2B0 // Driver scratch register 3
++ #define DRIVER_DW3_LBN 0
++ #define DRIVER_DW3_WIDTH 32
++#define DRIVER_REG4_KER_OFST 0x2C0 // Driver scratch register 4
++#define DRIVER_REG4_OFST 0x2C0 // Driver scratch register 4
++ #define DRIVER_DW4_LBN 0
++ #define DRIVER_DW4_WIDTH 32
++#define DRIVER_REG5_KER_OFST 0x2D0 // Driver scratch register 5
++#define DRIVER_REG5_OFST 0x2D0 // Driver scratch register 5
++ #define DRIVER_DW5_LBN 0
++ #define DRIVER_DW5_WIDTH 32
++#define DRIVER_REG6_KER_OFST 0x2E0 // Driver scratch register 6
++#define DRIVER_REG6_OFST 0x2E0 // Driver scratch register 6
++ #define DRIVER_DW6_LBN 0
++ #define DRIVER_DW6_WIDTH 32
++#define DRIVER_REG7_KER_OFST 0x2F0 // Driver scratch register 7
++#define DRIVER_REG7_OFST 0x2F0 // Driver scratch register 7
++ #define DRIVER_DW7_LBN 0
++ #define DRIVER_DW7_WIDTH 32
++#define ALTERA_BUILD_REG_OFST 0x300 // Altera build register
++#define ALTERA_BUILD_REG_OFST 0x300 // Altera build register
++ #define ALTERA_BUILD_VER_LBN 0
++ #define ALTERA_BUILD_VER_WIDTH 32
++
++/* so called CSR spare register
++ - contains separate parity enable bits for the various internal memory blocks */
++#define MEM_PARITY_ERR_EN_REG_KER 0x310
++#define MEM_PARITY_ALL_BLOCKS_EN_LBN 64
++#define MEM_PARITY_ALL_BLOCKS_EN_WIDTH 38
++#define MEM_PARITY_TX_DATA_EN_LBN 72
++#define MEM_PARITY_TX_DATA_EN_WIDTH 2
++
++//////////////---- Event & Timer Module Registers C Header ----//////////////
++
++#if EFVI_FALCON_EXTENDED_P_BAR
++#define EVQ_RPTR_REG_KER_OFST 0x11B00 // Event queue read pointer register
++#else
++#define EVQ_RPTR_REG_KER_OFST 0x1B00 // Event queue read pointer register
++#endif
++
++#define EVQ_RPTR_REG_OFST 0xFA0000 // Event queue read pointer register array.
++ #define EVQ_RPTR_LBN 0
++ #define EVQ_RPTR_WIDTH 15
++
++#if EFVI_FALCON_EXTENDED_P_BAR
++#define EVQ_PTR_TBL_KER_OFST 0x11A00 // Event queue pointer table for kernel access
++#else
++#define EVQ_PTR_TBL_KER_OFST 0x1A00 // Event queue pointer table for kernel access
++#endif
++
++#define EVQ_PTR_TBL_CHAR_OFST 0xF60000 // Event queue pointer table for char direct access
++ #define EVQ_WKUP_OR_INT_EN_LBN 39
++ #define EVQ_WKUP_OR_INT_EN_WIDTH 1
++ #define EVQ_NXT_WPTR_LBN 24
++ #define EVQ_NXT_WPTR_WIDTH 15
++ #define EVQ_EN_LBN 23
++ #define EVQ_EN_WIDTH 1
++ #define EVQ_SIZE_LBN 20
++ #define EVQ_SIZE_WIDTH 3
++ #define EVQ_BUF_BASE_ID_LBN 0
++ #define EVQ_BUF_BASE_ID_WIDTH 20
++#define TIMER_CMD_REG_KER_OFST 0x420 // Timer table for kernel access. Page-mapped
++#define TIMER_CMD_REG_PAGE4_OFST 0x8420 // Timer table for user-level access. Page-mapped. For lowest 1K queues.
++#define TIMER_CMD_REG_PAGE123K_OFST 0x1000420 // Timer table for user-level access. Page-mapped. For upper 3K queues.
++#define TIMER_TBL_OFST 0xF70000 // Timer table for char driver direct access
++ #define TIMER_MODE_LBN 12
++ #define TIMER_MODE_WIDTH 2
++ #define TIMER_VAL_LBN 0
++ #define TIMER_VAL_WIDTH 12
++ #define TIMER_MODE_INT_HLDOFF 2
++ #define EVQ_BUF_SIZE_LBN 0
++ #define EVQ_BUF_SIZE_WIDTH 1
++#define DRV_EV_REG_KER_OFST 0x440 // Driver generated event register
++#define DRV_EV_REG_OFST 0x440 // Driver generated event register
++ #define DRV_EV_QID_LBN 64
++ #define DRV_EV_QID_WIDTH 12
++ #define DRV_EV_DATA_LBN 0
++ #define DRV_EV_DATA_WIDTH 64
++#define EVQ_CTL_REG_KER_OFST 0x450 // Event queue control register
++#define EVQ_CTL_REG_OFST 0x450 // Event queue control register
++ #define RX_EVQ_WAKEUP_MASK_B0_LBN 15
++ #define RX_EVQ_WAKEUP_MASK_B0_WIDTH 6
++ #define EVQ_OWNERR_CTL_LBN 14
++ #define EVQ_OWNERR_CTL_WIDTH 1
++ #define EVQ_FIFO_AF_TH_LBN 8
++ #define EVQ_FIFO_AF_TH_WIDTH 6
++ #define EVQ_FIFO_NOTAF_TH_LBN 0
++ #define EVQ_FIFO_NOTAF_TH_WIDTH 6
++//////////////---- SRAM Module Registers C Header ----//////////////
++#define BUF_TBL_CFG_REG_KER_OFST 0x600 // Buffer table configuration register
++#define BUF_TBL_CFG_REG_OFST 0x600 // Buffer table configuration register
++ #define BUF_TBL_MODE_LBN 3
++ #define BUF_TBL_MODE_WIDTH 1
++#define SRM_RX_DC_CFG_REG_KER_OFST 0x610 // SRAM receive descriptor cache configuration register
++#define SRM_RX_DC_CFG_REG_OFST 0x610 // SRAM receive descriptor cache configuration register
++ #define SRM_RX_DC_BASE_ADR_LBN 0
++ #define SRM_RX_DC_BASE_ADR_WIDTH 21
++#define SRM_TX_DC_CFG_REG_KER_OFST 0x620 // SRAM transmit descriptor cache configuration register
++#define SRM_TX_DC_CFG_REG_OFST 0x620 // SRAM transmit descriptor cache configuration register
++ #define SRM_TX_DC_BASE_ADR_LBN 0
++ #define SRM_TX_DC_BASE_ADR_WIDTH 21
++#define SRM_CFG_REG_KER_OFST 0x630 // SRAM configuration register
++#define SRM_CFG_REG_OFST 0x630 // SRAM configuration register
++ #define SRAM_OOB_ADR_INTEN_LBN 5
++ #define SRAM_OOB_ADR_INTEN_WIDTH 1
++ #define SRAM_OOB_BUF_INTEN_LBN 4
++ #define SRAM_OOB_BUF_INTEN_WIDTH 1
++ #define SRAM_BT_INIT_EN_LBN 3
++ #define SRAM_BT_INIT_EN_WIDTH 1
++ #define SRM_NUM_BANK_LBN 2
++ #define SRM_NUM_BANK_WIDTH 1
++ #define SRM_BANK_SIZE_LBN 0
++ #define SRM_BANK_SIZE_WIDTH 2
++#define BUF_TBL_UPD_REG_KER_OFST 0x650 // Buffer table update register
++#define BUF_TBL_UPD_REG_OFST 0x650 // Buffer table update register
++ #define BUF_UPD_CMD_LBN 63
++ #define BUF_UPD_CMD_WIDTH 1
++ #define BUF_CLR_CMD_LBN 62
++ #define BUF_CLR_CMD_WIDTH 1
++ #define BUF_CLR_END_ID_LBN 32
++ #define BUF_CLR_END_ID_WIDTH 20
++ #define BUF_CLR_START_ID_LBN 0
++ #define BUF_CLR_START_ID_WIDTH 20
++#define SRM_UPD_EVQ_REG_KER_OFST 0x660 // Buffer table update register
++#define SRM_UPD_EVQ_REG_OFST 0x660 // Buffer table update register
++ #define SRM_UPD_EVQ_ID_LBN 0
++ #define SRM_UPD_EVQ_ID_WIDTH 12
++#define SRAM_PARITY_REG_KER_OFST 0x670 // SRAM parity register.
++#define SRAM_PARITY_REG_OFST 0x670 // SRAM parity register.
++ #define FORCE_SRAM_PERR_LBN 0
++ #define FORCE_SRAM_PERR_WIDTH 1
++
++#if EFVI_FALCON_EXTENDED_P_BAR
++#define BUF_HALF_TBL_KER_OFST 0x18000 // Buffer table in half buffer table mode direct access by kernel driver
++#else
++#define BUF_HALF_TBL_KER_OFST 0x8000 // Buffer table in half buffer table mode direct access by kernel driver
++#endif
++
++
++#define BUF_HALF_TBL_OFST 0x800000 // Buffer table in half buffer table mode direct access by char driver
++ #define BUF_ADR_HBUF_ODD_LBN 44
++ #define BUF_ADR_HBUF_ODD_WIDTH 20
++ #define BUF_OWNER_ID_HBUF_ODD_LBN 32
++ #define BUF_OWNER_ID_HBUF_ODD_WIDTH 12
++ #define BUF_ADR_HBUF_EVEN_LBN 12
++ #define BUF_ADR_HBUF_EVEN_WIDTH 20
++ #define BUF_OWNER_ID_HBUF_EVEN_LBN 0
++ #define BUF_OWNER_ID_HBUF_EVEN_WIDTH 12
++
++
++#if EFVI_FALCON_EXTENDED_P_BAR
++#define BUF_FULL_TBL_KER_OFST 0x18000 // Buffer table in full buffer table mode direct access by kernel driver
++#else
++#define BUF_FULL_TBL_KER_OFST 0x8000 // Buffer table in full buffer table mode direct access by kernel driver
++#endif
++
++
++
++
++#define BUF_FULL_TBL_OFST 0x800000 // Buffer table in full buffer table mode direct access by char driver
++ #define IP_DAT_BUF_SIZE_LBN 50
++ #define IP_DAT_BUF_SIZE_WIDTH 1
++ #define BUF_ADR_REGION_LBN 48
++ #define BUF_ADR_REGION_WIDTH 2
++ #define BUF_ADR_FBUF_LBN 14
++ #define BUF_ADR_FBUF_WIDTH 34
++ #define BUF_OWNER_ID_FBUF_LBN 0
++ #define BUF_OWNER_ID_FBUF_WIDTH 14
++#define SRM_DBG_REG_OFST 0x3000000 // SRAM debug access
++ #define SRM_DBG_LBN 0
++ #define SRM_DBG_WIDTH 64
++//////////////---- RX Datapath Registers C Header ----//////////////
++
++#define RX_CFG_REG_KER_OFST 0x800 // Receive configuration register
++#define RX_CFG_REG_OFST 0x800 // Receive configuration register
++
++#if !defined(FALCON_64K_RXFIFO) && !defined(FALCON_PRE_02020029)
++# if !defined(FALCON_128K_RXFIFO)
++# define FALCON_128K_RXFIFO
++# endif
++#endif
++
++#if defined(FALCON_128K_RXFIFO)
++
++/* new for B0 */
++ #define RX_TOEP_TCP_SUPPRESS_B0_LBN 48
++ #define RX_TOEP_TCP_SUPPRESS_B0_WIDTH 1
++ #define RX_INGR_EN_B0_LBN 47
++ #define RX_INGR_EN_B0_WIDTH 1
++ #define RX_TOEP_IPV4_B0_LBN 46
++ #define RX_TOEP_IPV4_B0_WIDTH 1
++ #define RX_HASH_ALG_B0_LBN 45
++ #define RX_HASH_ALG_B0_WIDTH 1
++ #define RX_HASH_INSERT_HDR_B0_LBN 44
++ #define RX_HASH_INSERT_HDR_B0_WIDTH 1
++/* moved for B0 */
++ #define RX_DESC_PUSH_EN_B0_LBN 43
++ #define RX_DESC_PUSH_EN_B0_WIDTH 1
++ #define RX_RDW_PATCH_EN_LBN 42 /* Non head of line blocking */
++ #define RX_RDW_PATCH_EN_WIDTH 1
++ #define RX_PCI_BURST_SIZE_B0_LBN 39
++ #define RX_PCI_BURST_SIZE_B0_WIDTH 3
++ #define RX_OWNERR_CTL_B0_LBN 38
++ #define RX_OWNERR_CTL_B0_WIDTH 1
++ #define RX_XON_TX_TH_B0_LBN 33
++ #define RX_XON_TX_TH_B0_WIDTH 5
++ #define RX_XOFF_TX_TH_B0_LBN 28
++ #define RX_XOFF_TX_TH_B0_WIDTH 5
++ #define RX_USR_BUF_SIZE_B0_LBN 19
++ #define RX_USR_BUF_SIZE_B0_WIDTH 9
++ #define RX_XON_MAC_TH_B0_LBN 10
++ #define RX_XON_MAC_TH_B0_WIDTH 9
++ #define RX_XOFF_MAC_TH_B0_LBN 1
++ #define RX_XOFF_MAC_TH_B0_WIDTH 9
++ #define RX_XOFF_MAC_EN_B0_LBN 0
++ #define RX_XOFF_MAC_EN_B0_WIDTH 1
++
++#elif !defined(FALCON_PRE_02020029)
++/* new for B0 */
++ #define RX_TOEP_TCP_SUPPRESS_B0_LBN 46
++ #define RX_TOEP_TCP_SUPPRESS_B0_WIDTH 1
++ #define RX_INGR_EN_B0_LBN 45
++ #define RX_INGR_EN_B0_WIDTH 1
++ #define RX_TOEP_IPV4_B0_LBN 44
++ #define RX_TOEP_IPV4_B0_WIDTH 1
++ #define RX_HASH_ALG_B0_LBN 43
++ #define RX_HASH_ALG_B0_WIDTH 41
++ #define RX_HASH_INSERT_HDR_B0_LBN 42
++ #define RX_HASH_INSERT_HDR_B0_WIDTH 1
++/* moved for B0 */
++ #define RX_DESC_PUSH_EN_B0_LBN 41
++ #define RX_DESC_PUSH_EN_B0_WIDTH 1
++ #define RX_PCI_BURST_SIZE_B0_LBN 37
++ #define RX_PCI_BURST_SIZE_B0_WIDTH 3
++ #define RX_OWNERR_CTL_B0_LBN 36
++ #define RX_OWNERR_CTL_B0_WIDTH 1
++ #define RX_XON_TX_TH_B0_LBN 31
++ #define RX_XON_TX_TH_B0_WIDTH 5
++ #define RX_XOFF_TX_TH_B0_LBN 26
++ #define RX_XOFF_TX_TH_B0_WIDTH 5
++ #define RX_USR_BUF_SIZE_B0_LBN 17
++ #define RX_USR_BUF_SIZE_B0_WIDTH 9
++ #define RX_XON_MAC_TH_B0_LBN 9
++ #define RX_XON_MAC_TH_B0_WIDTH 8
++ #define RX_XOFF_MAC_TH_B0_LBN 1
++ #define RX_XOFF_MAC_TH_B0_WIDTH 8
++ #define RX_XOFF_MAC_EN_B0_LBN 0
++ #define RX_XOFF_MAC_EN_B0_WIDTH 1
++
++#else
++/* new for B0 */
++ #define RX_TOEP_TCP_SUPPRESS_B0_LBN 44
++ #define RX_TOEP_TCP_SUPPRESS_B0_WIDTH 1
++ #define RX_INGR_EN_B0_LBN 43
++ #define RX_INGR_EN_B0_WIDTH 1
++ #define RX_TOEP_IPV4_B0_LBN 42
++ #define RX_TOEP_IPV4_B0_WIDTH 1
++ #define RX_HASH_ALG_B0_LBN 41
++ #define RX_HASH_ALG_B0_WIDTH 41
++ #define RX_HASH_INSERT_HDR_B0_LBN 40
++ #define RX_HASH_INSERT_HDR_B0_WIDTH 1
++/* moved for B0 */
++ #define RX_DESC_PUSH_EN_B0_LBN 35
++ #define RX_DESC_PUSH_EN_B0_WIDTH 1
++ #define RX_PCI_BURST_SIZE_B0_LBN 35
++ #define RX_PCI_BURST_SIZE_B0_WIDTH 2
++ #define RX_OWNERR_CTL_B0_LBN 34
++ #define RX_OWNERR_CTL_B0_WIDTH 1
++ #define RX_XON_TX_TH_B0_LBN 29
++ #define RX_XON_TX_TH_B0_WIDTH 5
++ #define RX_XOFF_TX_TH_B0_LBN 24
++ #define RX_XOFF_TX_TH_B0_WIDTH 5
++ #define RX_USR_BUF_SIZE_B0_LBN 15
++ #define RX_USR_BUF_SIZE_B0_WIDTH 9
++ #define RX_XON_MAC_TH_B0_LBN 8
++ #define RX_XON_MAC_TH_B0_WIDTH 7
++ #define RX_XOFF_MAC_TH_B0_LBN 1
++ #define RX_XOFF_MAC_TH_B0_WIDTH 7
++ #define RX_XOFF_MAC_EN_B0_LBN 0
++ #define RX_XOFF_MAC_EN_B0_WIDTH 1
++
++#endif
++
++/* A0/A1 */
++ #define RX_PUSH_EN_A1_LBN 35
++ #define RX_PUSH_EN_A1_WIDTH 1
++ #define RX_PCI_BURST_SIZE_A1_LBN 31
++ #define RX_PCI_BURST_SIZE_A1_WIDTH 3
++ #define RX_OWNERR_CTL_A1_LBN 30
++ #define RX_OWNERR_CTL_A1_WIDTH 1
++ #define RX_XON_TX_TH_A1_LBN 25
++ #define RX_XON_TX_TH_A1_WIDTH 5
++ #define RX_XOFF_TX_TH_A1_LBN 20
++ #define RX_XOFF_TX_TH_A1_WIDTH 5
++ #define RX_USR_BUF_SIZE_A1_LBN 11
++ #define RX_USR_BUF_SIZE_A1_WIDTH 9
++ #define RX_XON_MAC_TH_A1_LBN 6
++ #define RX_XON_MAC_TH_A1_WIDTH 5
++ #define RX_XOFF_MAC_TH_A1_LBN 1
++ #define RX_XOFF_MAC_TH_A1_WIDTH 5
++ #define RX_XOFF_MAC_EN_A1_LBN 0
++ #define RX_XOFF_MAC_EN_A1_WIDTH 1
++
++#define RX_FILTER_CTL_REG_OFST 0x810 // Receive filter control registers
++ #define SCATTER_ENBL_NO_MATCH_Q_B0_LBN 40
++ #define SCATTER_ENBL_NO_MATCH_Q_B0_WIDTH 1
++ #define UDP_FULL_SRCH_LIMIT_LBN 32
++ #define UDP_FULL_SRCH_LIMIT_WIDTH 8
++ #define NUM_KER_LBN 24
++ #define NUM_KER_WIDTH 2
++ #define UDP_WILD_SRCH_LIMIT_LBN 16
++ #define UDP_WILD_SRCH_LIMIT_WIDTH 8
++ #define TCP_WILD_SRCH_LIMIT_LBN 8
++ #define TCP_WILD_SRCH_LIMIT_WIDTH 8
++ #define TCP_FULL_SRCH_LIMIT_LBN 0
++ #define TCP_FULL_SRCH_LIMIT_WIDTH 8
++#define RX_FLUSH_DESCQ_REG_KER_OFST 0x820 // Receive flush descriptor queue register
++#define RX_FLUSH_DESCQ_REG_OFST 0x820 // Receive flush descriptor queue register
++ #define RX_FLUSH_DESCQ_CMD_LBN 24
++ #define RX_FLUSH_DESCQ_CMD_WIDTH 1
++ #define RX_FLUSH_EVQ_ID_LBN 12
++ #define RX_FLUSH_EVQ_ID_WIDTH 12
++ #define RX_FLUSH_DESCQ_LBN 0
++ #define RX_FLUSH_DESCQ_WIDTH 12
++#define RX_DESC_UPD_REG_KER_OFST 0x830 // Kernel receive descriptor update register. Page-mapped
++#define RX_DESC_UPD_REG_PAGE4_OFST 0x8830 // Char & user receive descriptor update register. Page-mapped. For lowest 1K queues.
++#define RX_DESC_UPD_REG_PAGE123K_OFST 0x1000830 // Char & user receive descriptor update register. Page-mapped. For upper 3K queues.
++ #define RX_DESC_WPTR_LBN 96
++ #define RX_DESC_WPTR_WIDTH 12
++ #define RX_DESC_PUSH_CMD_LBN 95
++ #define RX_DESC_PUSH_CMD_WIDTH 1
++ #define RX_DESC_LBN 0
++ #define RX_DESC_WIDTH 64
++ #define RX_KER_DESC_LBN 0
++ #define RX_KER_DESC_WIDTH 64
++ #define RX_USR_DESC_LBN 0
++ #define RX_USR_DESC_WIDTH 32
++#define RX_DC_CFG_REG_KER_OFST 0x840 // Receive descriptor cache configuration register
++#define RX_DC_CFG_REG_OFST 0x840 // Receive descriptor cache configuration register
++ #define RX_DC_SIZE_LBN 0
++ #define RX_DC_SIZE_WIDTH 2
++#define RX_DC_PF_WM_REG_KER_OFST 0x850 // Receive descriptor cache pre-fetch watermark register
++#define RX_DC_PF_WM_REG_OFST 0x850 // Receive descriptor cache pre-fetch watermark register
++ #define RX_DC_PF_LWM_LO_LBN 0
++ #define RX_DC_PF_LWM_LO_WIDTH 6
++
++#define RX_RSS_TKEY_B0_OFST 0x860 // RSS Toeplitz hash key (B0 only)
++
++#define RX_NODESC_DROP_REG 0x880
++ #define RX_NODESC_DROP_CNT_LBN 0
++ #define RX_NODESC_DROP_CNT_WIDTH 16
++
++#define XM_TX_CFG_REG_OFST 0x1230
++ #define XM_AUTO_PAD_LBN 5
++ #define XM_AUTO_PAD_WIDTH 1
++
++#define RX_FILTER_TBL0_OFST 0xF00000 // Receive filter table - even entries
++ #define RSS_EN_0_B0_LBN 110
++ #define RSS_EN_0_B0_WIDTH 1
++ #define SCATTER_EN_0_B0_LBN 109
++ #define SCATTER_EN_0_B0_WIDTH 1
++ #define TCP_UDP_0_LBN 108
++ #define TCP_UDP_0_WIDTH 1
++ #define RXQ_ID_0_LBN 96
++ #define RXQ_ID_0_WIDTH 12
++ #define DEST_IP_0_LBN 64
++ #define DEST_IP_0_WIDTH 32
++ #define DEST_PORT_TCP_0_LBN 48
++ #define DEST_PORT_TCP_0_WIDTH 16
++ #define SRC_IP_0_LBN 16
++ #define SRC_IP_0_WIDTH 32
++ #define SRC_TCP_DEST_UDP_0_LBN 0
++ #define SRC_TCP_DEST_UDP_0_WIDTH 16
++#define RX_FILTER_TBL1_OFST 0xF00010 // Receive filter table - odd entries
++ #define RSS_EN_1_B0_LBN 110
++ #define RSS_EN_1_B0_WIDTH 1
++ #define SCATTER_EN_1_B0_LBN 109
++ #define SCATTER_EN_1_B0_WIDTH 1
++ #define TCP_UDP_1_LBN 108
++ #define TCP_UDP_1_WIDTH 1
++ #define RXQ_ID_1_LBN 96
++ #define RXQ_ID_1_WIDTH 12
++ #define DEST_IP_1_LBN 64
++ #define DEST_IP_1_WIDTH 32
++ #define DEST_PORT_TCP_1_LBN 48
++ #define DEST_PORT_TCP_1_WIDTH 16
++ #define SRC_IP_1_LBN 16
++ #define SRC_IP_1_WIDTH 32
++ #define SRC_TCP_DEST_UDP_1_LBN 0
++ #define SRC_TCP_DEST_UDP_1_WIDTH 16
++
++#if EFVI_FALCON_EXTENDED_P_BAR
++#define RX_DESC_PTR_TBL_KER_OFST 0x11800 // Receive descriptor pointer kernel access
++#else
++#define RX_DESC_PTR_TBL_KER_OFST 0x1800 // Receive descriptor pointer kernel access
++#endif
++
++
++#define RX_DESC_PTR_TBL_OFST 0xF40000 // Receive descriptor pointer table
++ #define RX_ISCSI_DDIG_EN_LBN 88
++ #define RX_ISCSI_DDIG_EN_WIDTH 1
++ #define RX_ISCSI_HDIG_EN_LBN 87
++ #define RX_ISCSI_HDIG_EN_WIDTH 1
++ #define RX_DESC_PREF_ACT_LBN 86
++ #define RX_DESC_PREF_ACT_WIDTH 1
++ #define RX_DC_HW_RPTR_LBN 80
++ #define RX_DC_HW_RPTR_WIDTH 6
++ #define RX_DESCQ_HW_RPTR_LBN 68
++ #define RX_DESCQ_HW_RPTR_WIDTH 12
++ #define RX_DESCQ_SW_WPTR_LBN 56
++ #define RX_DESCQ_SW_WPTR_WIDTH 12
++ #define RX_DESCQ_BUF_BASE_ID_LBN 36
++ #define RX_DESCQ_BUF_BASE_ID_WIDTH 20
++ #define RX_DESCQ_EVQ_ID_LBN 24
++ #define RX_DESCQ_EVQ_ID_WIDTH 12
++ #define RX_DESCQ_OWNER_ID_LBN 10
++ #define RX_DESCQ_OWNER_ID_WIDTH 14
++ #define RX_DESCQ_LABEL_LBN 5
++ #define RX_DESCQ_LABEL_WIDTH 5
++ #define RX_DESCQ_SIZE_LBN 3
++ #define RX_DESCQ_SIZE_WIDTH 2
++ #define RX_DESCQ_TYPE_LBN 2
++ #define RX_DESCQ_TYPE_WIDTH 1
++ #define RX_DESCQ_JUMBO_LBN 1
++ #define RX_DESCQ_JUMBO_WIDTH 1
++ #define RX_DESCQ_EN_LBN 0
++ #define RX_DESCQ_EN_WIDTH 1
++
++
++#define RX_RSS_INDIR_TBL_B0_OFST 0xFB0000 // RSS indirection table (B0 only)
++ #define RX_RSS_INDIR_ENT_B0_LBN 0
++ #define RX_RSS_INDIR_ENT_B0_WIDTH 6
++
++//////////////---- TX Datapath Registers C Header ----//////////////
++#define TX_FLUSH_DESCQ_REG_KER_OFST 0xA00 // Transmit flush descriptor queue register
++#define TX_FLUSH_DESCQ_REG_OFST 0xA00 // Transmit flush descriptor queue register
++ #define TX_FLUSH_DESCQ_CMD_LBN 12
++ #define TX_FLUSH_DESCQ_CMD_WIDTH 1
++ #define TX_FLUSH_DESCQ_LBN 0
++ #define TX_FLUSH_DESCQ_WIDTH 12
++#define TX_DESC_UPD_REG_KER_OFST 0xA10 // Kernel transmit descriptor update register. Page-mapped
++#define TX_DESC_UPD_REG_PAGE4_OFST 0x8A10 // Char & user transmit descriptor update register. Page-mapped
++#define TX_DESC_UPD_REG_PAGE123K_OFST 0x1000A10 // Char & user transmit descriptor update register. Page-mapped
++ #define TX_DESC_WPTR_LBN 96
++ #define TX_DESC_WPTR_WIDTH 12
++ #define TX_DESC_PUSH_CMD_LBN 95
++ #define TX_DESC_PUSH_CMD_WIDTH 1
++ #define TX_DESC_LBN 0
++ #define TX_DESC_WIDTH 95
++ #define TX_KER_DESC_LBN 0
++ #define TX_KER_DESC_WIDTH 64
++ #define TX_USR_DESC_LBN 0
++ #define TX_USR_DESC_WIDTH 64
++#define TX_DC_CFG_REG_KER_OFST 0xA20 // Transmit descriptor cache configuration register
++#define TX_DC_CFG_REG_OFST 0xA20 // Transmit descriptor cache configuration register
++ #define TX_DC_SIZE_LBN 0
++ #define TX_DC_SIZE_WIDTH 2
++
++#if EFVI_FALCON_EXTENDED_P_BAR
++#define TX_DESC_PTR_TBL_KER_OFST 0x11900 // Transmit descriptor pointer.
++#else
++#define TX_DESC_PTR_TBL_KER_OFST 0x1900 // Transmit descriptor pointer.
++#endif
++
++
++#define TX_DESC_PTR_TBL_OFST 0xF50000 // Transmit descriptor pointer
++ #define TX_NON_IP_DROP_DIS_B0_LBN 91
++ #define TX_NON_IP_DROP_DIS_B0_WIDTH 1
++ #define TX_IP_CHKSM_DIS_B0_LBN 90
++ #define TX_IP_CHKSM_DIS_B0_WIDTH 1
++ #define TX_TCP_CHKSM_DIS_B0_LBN 89
++ #define TX_TCP_CHKSM_DIS_B0_WIDTH 1
++ #define TX_DESCQ_EN_LBN 88
++ #define TX_DESCQ_EN_WIDTH 1
++ #define TX_ISCSI_DDIG_EN_LBN 87
++ #define TX_ISCSI_DDIG_EN_WIDTH 1
++ #define TX_ISCSI_HDIG_EN_LBN 86
++ #define TX_ISCSI_HDIG_EN_WIDTH 1
++ #define TX_DC_HW_RPTR_LBN 80
++ #define TX_DC_HW_RPTR_WIDTH 6
++ #define TX_DESCQ_HW_RPTR_LBN 68
++ #define TX_DESCQ_HW_RPTR_WIDTH 12
++ #define TX_DESCQ_SW_WPTR_LBN 56
++ #define TX_DESCQ_SW_WPTR_WIDTH 12
++ #define TX_DESCQ_BUF_BASE_ID_LBN 36
++ #define TX_DESCQ_BUF_BASE_ID_WIDTH 20
++ #define TX_DESCQ_EVQ_ID_LBN 24
++ #define TX_DESCQ_EVQ_ID_WIDTH 12
++ #define TX_DESCQ_OWNER_ID_LBN 10
++ #define TX_DESCQ_OWNER_ID_WIDTH 14
++ #define TX_DESCQ_LABEL_LBN 5
++ #define TX_DESCQ_LABEL_WIDTH 5
++ #define TX_DESCQ_SIZE_LBN 3
++ #define TX_DESCQ_SIZE_WIDTH 2
++ #define TX_DESCQ_TYPE_LBN 1
++ #define TX_DESCQ_TYPE_WIDTH 2
++ #define TX_DESCQ_FLUSH_LBN 0
++ #define TX_DESCQ_FLUSH_WIDTH 1
++#define TX_CFG_REG_KER_OFST 0xA50 // Transmit configuration register
++#define TX_CFG_REG_OFST 0xA50 // Transmit configuration register
++ #define TX_IP_ID_P1_OFS_LBN 32
++ #define TX_IP_ID_P1_OFS_WIDTH 15
++ #define TX_IP_ID_P0_OFS_LBN 16
++ #define TX_IP_ID_P0_OFS_WIDTH 15
++ #define TX_TURBO_EN_LBN 3
++ #define TX_TURBO_EN_WIDTH 1
++ #define TX_OWNERR_CTL_LBN 2
++ #define TX_OWNERR_CTL_WIDTH 2
++ #define TX_NON_IP_DROP_DIS_LBN 1
++ #define TX_NON_IP_DROP_DIS_WIDTH 1
++ #define TX_IP_ID_REP_EN_LBN 0
++ #define TX_IP_ID_REP_EN_WIDTH 1
++#define TX_RESERVED_REG_KER_OFST 0xA80 // Transmit configuration register
++#define TX_RESERVED_REG_OFST 0xA80 // Transmit configuration register
++ #define TX_CSR_PUSH_EN_LBN 89
++ #define TX_CSR_PUSH_EN_WIDTH 1
++ #define TX_RX_SPACER_LBN 64
++ #define TX_RX_SPACER_WIDTH 8
++ #define TX_SW_EV_EN_LBN 59
++ #define TX_SW_EV_EN_WIDTH 1
++ #define TX_RX_SPACER_EN_LBN 57
++ #define TX_RX_SPACER_EN_WIDTH 1
++ #define TX_CSR_PREF_WD_TMR_LBN 24
++ #define TX_CSR_PREF_WD_TMR_WIDTH 16
++ #define TX_CSR_ONLY1TAG_LBN 21
++ #define TX_CSR_ONLY1TAG_WIDTH 1
++ #define TX_PREF_THRESHOLD_LBN 19
++ #define TX_PREF_THRESHOLD_WIDTH 2
++ #define TX_ONE_PKT_PER_Q_LBN 18
++ #define TX_ONE_PKT_PER_Q_WIDTH 1
++ #define TX_DIS_NON_IP_EV_LBN 17
++ #define TX_DIS_NON_IP_EV_WIDTH 1
++ #define TX_DMA_SPACER_LBN 8
++ #define TX_DMA_SPACER_WIDTH 8
++ #define TX_FLUSH_MIN_LEN_EN_B0_LBN 7
++ #define TX_FLUSH_MIN_LEN_EN_B0_WIDTH 1
++ #define TX_TCP_DIS_A1_LBN 7
++ #define TX_TCP_DIS_A1_WIDTH 1
++ #define TX_IP_DIS_A1_LBN 6
++ #define TX_IP_DIS_A1_WIDTH 1
++ #define TX_MAX_CPL_LBN 2
++ #define TX_MAX_CPL_WIDTH 2
++ #define TX_MAX_PREF_LBN 0
++ #define TX_MAX_PREF_WIDTH 2
++#define TX_VLAN_REG_OFST 0xAE0 // Transmit VLAN tag register
++ #define TX_VLAN_EN_LBN 127
++ #define TX_VLAN_EN_WIDTH 1
++ #define TX_VLAN7_PORT1_EN_LBN 125
++ #define TX_VLAN7_PORT1_EN_WIDTH 1
++ #define TX_VLAN7_PORT0_EN_LBN 124
++ #define TX_VLAN7_PORT0_EN_WIDTH 1
++ #define TX_VLAN7_LBN 112
++ #define TX_VLAN7_WIDTH 12
++ #define TX_VLAN6_PORT1_EN_LBN 109
++ #define TX_VLAN6_PORT1_EN_WIDTH 1
++ #define TX_VLAN6_PORT0_EN_LBN 108
++ #define TX_VLAN6_PORT0_EN_WIDTH 1
++ #define TX_VLAN6_LBN 96
++ #define TX_VLAN6_WIDTH 12
++ #define TX_VLAN5_PORT1_EN_LBN 93
++ #define TX_VLAN5_PORT1_EN_WIDTH 1
++ #define TX_VLAN5_PORT0_EN_LBN 92
++ #define TX_VLAN5_PORT0_EN_WIDTH 1
++ #define TX_VLAN5_LBN 80
++ #define TX_VLAN5_WIDTH 12
++ #define TX_VLAN4_PORT1_EN_LBN 77
++ #define TX_VLAN4_PORT1_EN_WIDTH 1
++ #define TX_VLAN4_PORT0_EN_LBN 76
++ #define TX_VLAN4_PORT0_EN_WIDTH 1
++ #define TX_VLAN4_LBN 64
++ #define TX_VLAN4_WIDTH 12
++ #define TX_VLAN3_PORT1_EN_LBN 61
++ #define TX_VLAN3_PORT1_EN_WIDTH 1
++ #define TX_VLAN3_PORT0_EN_LBN 60
++ #define TX_VLAN3_PORT0_EN_WIDTH 1
++ #define TX_VLAN3_LBN 48
++ #define TX_VLAN3_WIDTH 12
++ #define TX_VLAN2_PORT1_EN_LBN 45
++ #define TX_VLAN2_PORT1_EN_WIDTH 1
++ #define TX_VLAN2_PORT0_EN_LBN 44
++ #define TX_VLAN2_PORT0_EN_WIDTH 1
++ #define TX_VLAN2_LBN 32
++ #define TX_VLAN2_WIDTH 12
++ #define TX_VLAN1_PORT1_EN_LBN 29
++ #define TX_VLAN1_PORT1_EN_WIDTH 1
++ #define TX_VLAN1_PORT0_EN_LBN 28
++ #define TX_VLAN1_PORT0_EN_WIDTH 1
++ #define TX_VLAN1_LBN 16
++ #define TX_VLAN1_WIDTH 12
++ #define TX_VLAN0_PORT1_EN_LBN 13
++ #define TX_VLAN0_PORT1_EN_WIDTH 1
++ #define TX_VLAN0_PORT0_EN_LBN 12
++ #define TX_VLAN0_PORT0_EN_WIDTH 1
++ #define TX_VLAN0_LBN 0
++ #define TX_VLAN0_WIDTH 12
++#define TX_FIL_CTL_REG_OFST 0xAF0 // Transmit filter control register
++ #define TX_MADR1_FIL_EN_LBN 65
++ #define TX_MADR1_FIL_EN_WIDTH 1
++ #define TX_MADR0_FIL_EN_LBN 64
++ #define TX_MADR0_FIL_EN_WIDTH 1
++ #define TX_IPFIL31_PORT1_EN_LBN 63
++ #define TX_IPFIL31_PORT1_EN_WIDTH 1
++ #define TX_IPFIL31_PORT0_EN_LBN 62
++ #define TX_IPFIL31_PORT0_EN_WIDTH 1
++ #define TX_IPFIL30_PORT1_EN_LBN 61
++ #define TX_IPFIL30_PORT1_EN_WIDTH 1
++ #define TX_IPFIL30_PORT0_EN_LBN 60
++ #define TX_IPFIL30_PORT0_EN_WIDTH 1
++ #define TX_IPFIL29_PORT1_EN_LBN 59
++ #define TX_IPFIL29_PORT1_EN_WIDTH 1
++ #define TX_IPFIL29_PORT0_EN_LBN 58
++ #define TX_IPFIL29_PORT0_EN_WIDTH 1
++ #define TX_IPFIL28_PORT1_EN_LBN 57
++ #define TX_IPFIL28_PORT1_EN_WIDTH 1
++ #define TX_IPFIL28_PORT0_EN_LBN 56
++ #define TX_IPFIL28_PORT0_EN_WIDTH 1
++ #define TX_IPFIL27_PORT1_EN_LBN 55
++ #define TX_IPFIL27_PORT1_EN_WIDTH 1
++ #define TX_IPFIL27_PORT0_EN_LBN 54
++ #define TX_IPFIL27_PORT0_EN_WIDTH 1
++ #define TX_IPFIL26_PORT1_EN_LBN 53
++ #define TX_IPFIL26_PORT1_EN_WIDTH 1
++ #define TX_IPFIL26_PORT0_EN_LBN 52
++ #define TX_IPFIL26_PORT0_EN_WIDTH 1
++ #define TX_IPFIL25_PORT1_EN_LBN 51
++ #define TX_IPFIL25_PORT1_EN_WIDTH 1
++ #define TX_IPFIL25_PORT0_EN_LBN 50
++ #define TX_IPFIL25_PORT0_EN_WIDTH 1
++ #define TX_IPFIL24_PORT1_EN_LBN 49
++ #define TX_IPFIL24_PORT1_EN_WIDTH 1
++ #define TX_IPFIL24_PORT0_EN_LBN 48
++ #define TX_IPFIL24_PORT0_EN_WIDTH 1
++ #define TX_IPFIL23_PORT1_EN_LBN 47
++ #define TX_IPFIL23_PORT1_EN_WIDTH 1
++ #define TX_IPFIL23_PORT0_EN_LBN 46
++ #define TX_IPFIL23_PORT0_EN_WIDTH 1
++ #define TX_IPFIL22_PORT1_EN_LBN 45
++ #define TX_IPFIL22_PORT1_EN_WIDTH 1
++ #define TX_IPFIL22_PORT0_EN_LBN 44
++ #define TX_IPFIL22_PORT0_EN_WIDTH 1
++ #define TX_IPFIL21_PORT1_EN_LBN 43
++ #define TX_IPFIL21_PORT1_EN_WIDTH 1
++ #define TX_IPFIL21_PORT0_EN_LBN 42
++ #define TX_IPFIL21_PORT0_EN_WIDTH 1
++ #define TX_IPFIL20_PORT1_EN_LBN 41
++ #define TX_IPFIL20_PORT1_EN_WIDTH 1
++ #define TX_IPFIL20_PORT0_EN_LBN 40
++ #define TX_IPFIL20_PORT0_EN_WIDTH 1
++ #define TX_IPFIL19_PORT1_EN_LBN 39
++ #define TX_IPFIL19_PORT1_EN_WIDTH 1
++ #define TX_IPFIL19_PORT0_EN_LBN 38
++ #define TX_IPFIL19_PORT0_EN_WIDTH 1
++ #define TX_IPFIL18_PORT1_EN_LBN 37
++ #define TX_IPFIL18_PORT1_EN_WIDTH 1
++ #define TX_IPFIL18_PORT0_EN_LBN 36
++ #define TX_IPFIL18_PORT0_EN_WIDTH 1
++ #define TX_IPFIL17_PORT1_EN_LBN 35
++ #define TX_IPFIL17_PORT1_EN_WIDTH 1
++ #define TX_IPFIL17_PORT0_EN_LBN 34
++ #define TX_IPFIL17_PORT0_EN_WIDTH 1
++ #define TX_IPFIL16_PORT1_EN_LBN 33
++ #define TX_IPFIL16_PORT1_EN_WIDTH 1
++ #define TX_IPFIL16_PORT0_EN_LBN 32
++ #define TX_IPFIL16_PORT0_EN_WIDTH 1
++ #define TX_IPFIL15_PORT1_EN_LBN 31
++ #define TX_IPFIL15_PORT1_EN_WIDTH 1
++ #define TX_IPFIL15_PORT0_EN_LBN 30
++ #define TX_IPFIL15_PORT0_EN_WIDTH 1
++ #define TX_IPFIL14_PORT1_EN_LBN 29
++ #define TX_IPFIL14_PORT1_EN_WIDTH 1
++ #define TX_IPFIL14_PORT0_EN_LBN 28
++ #define TX_IPFIL14_PORT0_EN_WIDTH 1
++ #define TX_IPFIL13_PORT1_EN_LBN 27
++ #define TX_IPFIL13_PORT1_EN_WIDTH 1
++ #define TX_IPFIL13_PORT0_EN_LBN 26
++ #define TX_IPFIL13_PORT0_EN_WIDTH 1
++ #define TX_IPFIL12_PORT1_EN_LBN 25
++ #define TX_IPFIL12_PORT1_EN_WIDTH 1
++ #define TX_IPFIL12_PORT0_EN_LBN 24
++ #define TX_IPFIL12_PORT0_EN_WIDTH 1
++ #define TX_IPFIL11_PORT1_EN_LBN 23
++ #define TX_IPFIL11_PORT1_EN_WIDTH 1
++ #define TX_IPFIL11_PORT0_EN_LBN 22
++ #define TX_IPFIL11_PORT0_EN_WIDTH 1
++ #define TX_IPFIL10_PORT1_EN_LBN 21
++ #define TX_IPFIL10_PORT1_EN_WIDTH 1
++ #define TX_IPFIL10_PORT0_EN_LBN 20
++ #define TX_IPFIL10_PORT0_EN_WIDTH 1
++ #define TX_IPFIL9_PORT1_EN_LBN 19
++ #define TX_IPFIL9_PORT1_EN_WIDTH 1
++ #define TX_IPFIL9_PORT0_EN_LBN 18
++ #define TX_IPFIL9_PORT0_EN_WIDTH 1
++ #define TX_IPFIL8_PORT1_EN_LBN 17
++ #define TX_IPFIL8_PORT1_EN_WIDTH 1
++ #define TX_IPFIL8_PORT0_EN_LBN 16
++ #define TX_IPFIL8_PORT0_EN_WIDTH 1
++ #define TX_IPFIL7_PORT1_EN_LBN 15
++ #define TX_IPFIL7_PORT1_EN_WIDTH 1
++ #define TX_IPFIL7_PORT0_EN_LBN 14
++ #define TX_IPFIL7_PORT0_EN_WIDTH 1
++ #define TX_IPFIL6_PORT1_EN_LBN 13
++ #define TX_IPFIL6_PORT1_EN_WIDTH 1
++ #define TX_IPFIL6_PORT0_EN_LBN 12
++ #define TX_IPFIL6_PORT0_EN_WIDTH 1
++ #define TX_IPFIL5_PORT1_EN_LBN 11
++ #define TX_IPFIL5_PORT1_EN_WIDTH 1
++ #define TX_IPFIL5_PORT0_EN_LBN 10
++ #define TX_IPFIL5_PORT0_EN_WIDTH 1
++ #define TX_IPFIL4_PORT1_EN_LBN 9
++ #define TX_IPFIL4_PORT1_EN_WIDTH 1
++ #define TX_IPFIL4_PORT0_EN_LBN 8
++ #define TX_IPFIL4_PORT0_EN_WIDTH 1
++ #define TX_IPFIL3_PORT1_EN_LBN 7
++ #define TX_IPFIL3_PORT1_EN_WIDTH 1
++ #define TX_IPFIL3_PORT0_EN_LBN 6
++ #define TX_IPFIL3_PORT0_EN_WIDTH 1
++ #define TX_IPFIL2_PORT1_EN_LBN 5
++ #define TX_IPFIL2_PORT1_EN_WIDTH 1
++ #define TX_IPFIL2_PORT0_EN_LBN 4
++ #define TX_IPFIL2_PORT0_EN_WIDTH 1
++ #define TX_IPFIL1_PORT1_EN_LBN 3
++ #define TX_IPFIL1_PORT1_EN_WIDTH 1
++ #define TX_IPFIL1_PORT0_EN_LBN 2
++ #define TX_IPFIL1_PORT0_EN_WIDTH 1
++ #define TX_IPFIL0_PORT1_EN_LBN 1
++ #define TX_IPFIL0_PORT1_EN_WIDTH 1
++ #define TX_IPFIL0_PORT0_EN_LBN 0
++ #define TX_IPFIL0_PORT0_EN_WIDTH 1
++#define TX_IPFIL_TBL_OFST 0xB00 // Transmit IP source address filter table
++ #define TX_IPFIL_MASK_LBN 32
++ #define TX_IPFIL_MASK_WIDTH 32
++ #define TX_IP_SRC_ADR_LBN 0
++ #define TX_IP_SRC_ADR_WIDTH 32
++#define TX_PACE_REG_A1_OFST 0xF80000 // Transmit pace control register
++#define TX_PACE_REG_B0_OFST 0xA90 // Transmit pace control register
++ #define TX_PACE_SB_AF_LBN 19
++ #define TX_PACE_SB_AF_WIDTH 10
++ #define TX_PACE_SB_NOTAF_LBN 9
++ #define TX_PACE_SB_NOTAF_WIDTH 10
++ #define TX_PACE_FB_BASE_LBN 5
++ #define TX_PACE_FB_BASE_WIDTH 4
++ #define TX_PACE_BIN_TH_LBN 0
++ #define TX_PACE_BIN_TH_WIDTH 5
++#define TX_PACE_TBL_A1_OFST 0xF80040 // Transmit pacing table
++#define TX_PACE_TBL_FIRST_QUEUE_A1 4
++#define TX_PACE_TBL_B0_OFST 0xF80000 // Transmit pacing table
++#define TX_PACE_TBL_FIRST_QUEUE_B0 0
++ #define TX_PACE_LBN 0
++ #define TX_PACE_WIDTH 5
++
++//////////////---- EE/Flash Registers C Header ----//////////////
++#define EE_SPI_HCMD_REG_KER_OFST 0x100 // SPI host command register
++#define EE_SPI_HCMD_REG_OFST 0x100 // SPI host command register
++ #define EE_SPI_HCMD_CMD_EN_LBN 31
++ #define EE_SPI_HCMD_CMD_EN_WIDTH 1
++ #define EE_WR_TIMER_ACTIVE_LBN 28
++ #define EE_WR_TIMER_ACTIVE_WIDTH 1
++ #define EE_SPI_HCMD_SF_SEL_LBN 24
++ #define EE_SPI_HCMD_SF_SEL_WIDTH 1
++ #define EE_SPI_HCMD_DABCNT_LBN 16
++ #define EE_SPI_HCMD_DABCNT_WIDTH 5
++ #define EE_SPI_HCMD_READ_LBN 15
++ #define EE_SPI_HCMD_READ_WIDTH 1
++ #define EE_SPI_HCMD_DUBCNT_LBN 12
++ #define EE_SPI_HCMD_DUBCNT_WIDTH 2
++ #define EE_SPI_HCMD_ADBCNT_LBN 8
++ #define EE_SPI_HCMD_ADBCNT_WIDTH 2
++ #define EE_SPI_HCMD_ENC_LBN 0
++ #define EE_SPI_HCMD_ENC_WIDTH 8
++#define EE_SPI_HADR_REG_KER_OFST 0X110 // SPI host address register
++#define EE_SPI_HADR_REG_OFST 0X110 // SPI host address register
++ #define EE_SPI_HADR_DUBYTE_LBN 24
++ #define EE_SPI_HADR_DUBYTE_WIDTH 8
++ #define EE_SPI_HADR_ADR_LBN 0
++ #define EE_SPI_HADR_ADR_WIDTH 24
++#define EE_SPI_HDATA_REG_KER_OFST 0x120 // SPI host data register
++#define EE_SPI_HDATA_REG_OFST 0x120 // SPI host data register
++ #define EE_SPI_HDATA3_LBN 96
++ #define EE_SPI_HDATA3_WIDTH 32
++ #define EE_SPI_HDATA2_LBN 64
++ #define EE_SPI_HDATA2_WIDTH 32
++ #define EE_SPI_HDATA1_LBN 32
++ #define EE_SPI_HDATA1_WIDTH 32
++ #define EE_SPI_HDATA0_LBN 0
++ #define EE_SPI_HDATA0_WIDTH 32
++#define EE_BASE_PAGE_REG_KER_OFST 0x130 // Expansion ROM base mirror register
++#define EE_BASE_PAGE_REG_OFST 0x130 // Expansion ROM base mirror register
++ #define EE_EXP_ROM_WINDOW_BASE_LBN 16
++ #define EE_EXP_ROM_WINDOW_BASE_WIDTH 13
++ #define EE_EXPROM_MASK_LBN 0
++ #define EE_EXPROM_MASK_WIDTH 13
++#define EE_VPD_CFG0_REG_KER_OFST 0X140 // SPI/VPD configuration register
++#define EE_VPD_CFG0_REG_OFST 0X140 // SPI/VPD configuration register
++ #define EE_SF_FASTRD_EN_LBN 127
++ #define EE_SF_FASTRD_EN_WIDTH 1
++ #define EE_SF_CLOCK_DIV_LBN 120
++ #define EE_SF_CLOCK_DIV_WIDTH 7
++ #define EE_VPD_WIP_POLL_LBN 119
++ #define EE_VPD_WIP_POLL_WIDTH 1
++ #define EE_VPDW_LENGTH_LBN 80
++ #define EE_VPDW_LENGTH_WIDTH 15
++ #define EE_VPDW_BASE_LBN 64
++ #define EE_VPDW_BASE_WIDTH 15
++ #define EE_VPD_WR_CMD_EN_LBN 56
++ #define EE_VPD_WR_CMD_EN_WIDTH 8
++ #define EE_VPD_BASE_LBN 32
++ #define EE_VPD_BASE_WIDTH 24
++ #define EE_VPD_LENGTH_LBN 16
++ #define EE_VPD_LENGTH_WIDTH 13
++ #define EE_VPD_AD_SIZE_LBN 8
++ #define EE_VPD_AD_SIZE_WIDTH 5
++ #define EE_VPD_ACCESS_ON_LBN 5
++ #define EE_VPD_ACCESS_ON_WIDTH 1
++#define EE_VPD_SW_CNTL_REG_KER_OFST 0X150 // VPD access SW control register
++#define EE_VPD_SW_CNTL_REG_OFST 0X150 // VPD access SW control register
++ #define EE_VPD_CYCLE_PENDING_LBN 31
++ #define EE_VPD_CYCLE_PENDING_WIDTH 1
++ #define EE_VPD_CYC_WRITE_LBN 28
++ #define EE_VPD_CYC_WRITE_WIDTH 1
++ #define EE_VPD_CYC_ADR_LBN 0
++ #define EE_VPD_CYC_ADR_WIDTH 15
++#define EE_VPD_SW_DATA_REG_KER_OFST 0x160 // VPD access SW data register
++#define EE_VPD_SW_DATA_REG_OFST 0x160 // VPD access SW data register
++ #define EE_VPD_CYC_DAT_LBN 0
++ #define EE_VPD_CYC_DAT_WIDTH 32
+Index: head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_falcon_desc.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_falcon_desc.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,43 @@
++//////////////---- Descriptors C Headers ----//////////////
++// Receive Kernel IP Descriptor
++ #define RX_KER_BUF_SIZE_LBN 48
++ #define RX_KER_BUF_SIZE_WIDTH 14
++ #define RX_KER_BUF_REGION_LBN 46
++ #define RX_KER_BUF_REGION_WIDTH 2
++ #define RX_KER_BUF_REGION0_DECODE 0
++ #define RX_KER_BUF_REGION1_DECODE 1
++ #define RX_KER_BUF_REGION2_DECODE 2
++ #define RX_KER_BUF_REGION3_DECODE 3
++ #define RX_KER_BUF_ADR_LBN 0
++ #define RX_KER_BUF_ADR_WIDTH 46
++// Receive User IP Descriptor
++ #define RX_USR_2BYTE_OFS_LBN 20
++ #define RX_USR_2BYTE_OFS_WIDTH 12
++ #define RX_USR_BUF_ID_LBN 0
++ #define RX_USR_BUF_ID_WIDTH 20
++// Transmit Kernel IP Descriptor
++ #define TX_KER_PORT_LBN 63
++ #define TX_KER_PORT_WIDTH 1
++ #define TX_KER_CONT_LBN 62
++ #define TX_KER_CONT_WIDTH 1
++ #define TX_KER_BYTE_CNT_LBN 48
++ #define TX_KER_BYTE_CNT_WIDTH 14
++ #define TX_KER_BUF_REGION_LBN 46
++ #define TX_KER_BUF_REGION_WIDTH 2
++ #define TX_KER_BUF_REGION0_DECODE 0
++ #define TX_KER_BUF_REGION1_DECODE 1
++ #define TX_KER_BUF_REGION2_DECODE 2
++ #define TX_KER_BUF_REGION3_DECODE 3
++ #define TX_KER_BUF_ADR_LBN 0
++ #define TX_KER_BUF_ADR_WIDTH 46
++// Transmit User IP Descriptor
++ #define TX_USR_PORT_LBN 47
++ #define TX_USR_PORT_WIDTH 1
++ #define TX_USR_CONT_LBN 46
++ #define TX_USR_CONT_WIDTH 1
++ #define TX_USR_BYTE_CNT_LBN 33
++ #define TX_USR_BYTE_CNT_WIDTH 13
++ #define TX_USR_BUF_ID_LBN 13
++ #define TX_USR_BUF_ID_WIDTH 20
++ #define TX_USR_BYTE_OFS_LBN 0
++ #define TX_USR_BYTE_OFS_WIDTH 13
+Index: head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_falcon_event.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_falcon_event.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,123 @@
++//////////////---- Events Format C Header ----//////////////
++//////////////---- Event entry ----//////////////
++ #define EV_CODE_LBN 60
++ #define EV_CODE_WIDTH 4
++ #define RX_IP_EV_DECODE 0
++ #define TX_IP_EV_DECODE 2
++ #define DRIVER_EV_DECODE 5
++ #define GLOBAL_EV_DECODE 6
++ #define DRV_GEN_EV_DECODE 7
++ #define EV_DATA_LBN 0
++ #define EV_DATA_WIDTH 60
++//////////////---- Receive IP events for both Kernel & User event queues ----//////////////
++ #define RX_EV_PKT_OK_LBN 56
++ #define RX_EV_PKT_OK_WIDTH 1
++ #define RX_EV_BUF_OWNER_ID_ERR_LBN 54
++ #define RX_EV_BUF_OWNER_ID_ERR_WIDTH 1
++ #define RX_EV_IP_HDR_CHKSUM_ERR_LBN 52
++ #define RX_EV_IP_HDR_CHKSUM_ERR_WIDTH 1
++ #define RX_EV_TCP_UDP_CHKSUM_ERR_LBN 51
++ #define RX_EV_TCP_UDP_CHKSUM_ERR_WIDTH 1
++ #define RX_EV_ETH_CRC_ERR_LBN 50
++ #define RX_EV_ETH_CRC_ERR_WIDTH 1
++ #define RX_EV_FRM_TRUNC_LBN 49
++ #define RX_EV_FRM_TRUNC_WIDTH 1
++ #define RX_EV_DRIB_NIB_LBN 48
++ #define RX_EV_DRIB_NIB_WIDTH 1
++ #define RX_EV_TOBE_DISC_LBN 47
++ #define RX_EV_TOBE_DISC_WIDTH 1
++ #define RX_EV_PKT_TYPE_LBN 44
++ #define RX_EV_PKT_TYPE_WIDTH 3
++ #define RX_EV_PKT_TYPE_ETH_DECODE 0
++ #define RX_EV_PKT_TYPE_LLC_DECODE 1
++ #define RX_EV_PKT_TYPE_JUMBO_DECODE 2
++ #define RX_EV_PKT_TYPE_VLAN_DECODE 3
++ #define RX_EV_PKT_TYPE_VLAN_LLC_DECODE 4
++ #define RX_EV_PKT_TYPE_VLAN_JUMBO_DECODE 5
++ #define RX_EV_HDR_TYPE_LBN 42
++ #define RX_EV_HDR_TYPE_WIDTH 2
++ #define RX_EV_HDR_TYPE_TCP_IPV4_DECODE 0
++ #define RX_EV_HDR_TYPE_UDP_IPV4_DECODE 1
++ #define RX_EV_HDR_TYPE_OTHER_IP_DECODE 2
++ #define RX_EV_HDR_TYPE_NON_IP_DECODE 3
++ #define RX_EV_DESC_Q_EMPTY_LBN 41
++ #define RX_EV_DESC_Q_EMPTY_WIDTH 1
++ #define RX_EV_MCAST_HASH_MATCH_LBN 40
++ #define RX_EV_MCAST_HASH_MATCH_WIDTH 1
++ #define RX_EV_MCAST_PKT_LBN 39
++ #define RX_EV_MCAST_PKT_WIDTH 1
++ #define RX_EV_Q_LABEL_LBN 32
++ #define RX_EV_Q_LABEL_WIDTH 5
++ #define RX_JUMBO_CONT_LBN 31
++ #define RX_JUMBO_CONT_WIDTH 1
++ #define RX_SOP_LBN 15
++ #define RX_SOP_WIDTH 1
++ #define RX_PORT_LBN 30
++ #define RX_PORT_WIDTH 1
++ #define RX_EV_BYTE_CNT_LBN 16
++ #define RX_EV_BYTE_CNT_WIDTH 14
++ #define RX_iSCSI_PKT_OK_LBN 14
++ #define RX_iSCSI_PKT_OK_WIDTH 1
++ #define RX_ISCSI_DDIG_ERR_LBN 13
++ #define RX_ISCSI_DDIG_ERR_WIDTH 1
++ #define RX_ISCSI_HDIG_ERR_LBN 12
++ #define RX_ISCSI_HDIG_ERR_WIDTH 1
++ #define RX_EV_DESC_PTR_LBN 0
++ #define RX_EV_DESC_PTR_WIDTH 12
++//////////////---- Transmit IP events for both Kernel & User event queues ----//////////////
++ #define TX_EV_PKT_ERR_LBN 38
++ #define TX_EV_PKT_ERR_WIDTH 1
++ #define TX_EV_PKT_TOO_BIG_LBN 37
++ #define TX_EV_PKT_TOO_BIG_WIDTH 1
++ #define TX_EV_Q_LABEL_LBN 32
++ #define TX_EV_Q_LABEL_WIDTH 5
++ #define TX_EV_PORT_LBN 16
++ #define TX_EV_PORT_WIDTH 1
++ #define TX_EV_WQ_FF_FULL_LBN 15
++ #define TX_EV_WQ_FF_FULL_WIDTH 1
++ #define TX_EV_BUF_OWNER_ID_ERR_LBN 14
++ #define TX_EV_BUF_OWNER_ID_ERR_WIDTH 1
++ #define TX_EV_COMP_LBN 12
++ #define TX_EV_COMP_WIDTH 1
++ #define TX_EV_DESC_PTR_LBN 0
++ #define TX_EV_DESC_PTR_WIDTH 12
++//////////////---- Char or Kernel driver events ----//////////////
++ #define DRIVER_EV_SUB_CODE_LBN 56
++ #define DRIVER_EV_SUB_CODE_WIDTH 4
++ #define TX_DESCQ_FLS_DONE_EV_DECODE 0x0
++ #define RX_DESCQ_FLS_DONE_EV_DECODE 0x1
++ #define EVQ_INIT_DONE_EV_DECODE 0x2
++ #define EVQ_NOT_EN_EV_DECODE 0x3
++ #define RX_DESCQ_FLSFF_OVFL_EV_DECODE 0x4
++ #define SRM_UPD_DONE_EV_DECODE 0x5
++ #define WAKE_UP_EV_DECODE 0x6
++ #define TX_PKT_NON_TCP_UDP_DECODE 0x9
++ #define TIMER_EV_DECODE 0xA
++ #define RX_DSC_ERROR_EV_DECODE 0xE
++ #define DRIVER_EV_TX_DESCQ_ID_LBN 0
++ #define DRIVER_EV_TX_DESCQ_ID_WIDTH 12
++ #define DRIVER_EV_RX_DESCQ_ID_LBN 0
++ #define DRIVER_EV_RX_DESCQ_ID_WIDTH 12
++ #define DRIVER_EV_EVQ_ID_LBN 0
++ #define DRIVER_EV_EVQ_ID_WIDTH 12
++ #define DRIVER_TMR_ID_LBN 0
++ #define DRIVER_TMR_ID_WIDTH 12
++ #define DRIVER_EV_SRM_UPD_LBN 0
++ #define DRIVER_EV_SRM_UPD_WIDTH 2
++ #define SRM_CLR_EV_DECODE 0
++ #define SRM_UPD_EV_DECODE 1
++ #define SRM_ILLCLR_EV_DECODE 2
++//////////////---- Global events. Sent to both event queue 0 and 4. ----//////////////
++ #define XFP_PHY_INTR_LBN 10
++ #define XFP_PHY_INTR_WIDTH 1
++ #define XG_PHY_INTR_LBN 9
++ #define XG_PHY_INTR_WIDTH 1
++ #define G_PHY1_INTR_LBN 8
++ #define G_PHY1_INTR_WIDTH 1
++ #define G_PHY0_INTR_LBN 7
++ #define G_PHY0_INTR_WIDTH 1
++//////////////---- Driver generated events ----//////////////
++ #define DRV_GEN_EV_CODE_LBN 60
++ #define DRV_GEN_EV_CODE_WIDTH 4
++ #define DRV_GEN_EV_DATA_LBN 0
++ #define DRV_GEN_EV_DATA_WIDTH 60
+Index: head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_internal.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/ef_vi_internal.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,256 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr
++ * \brief Really-and-truely-honestly internal stuff for libef.
++ * \date 2004/06/13
++ */
++
++/*! \cidoxg_include_ci_ul */
++#ifndef __CI_EF_VI_INTERNAL_H__
++#define __CI_EF_VI_INTERNAL_H__
++
++
++/* These flags share space with enum ef_vi_flags. */
++#define EF_VI_BUG5692_WORKAROUND 0x10000
++
++
++/* ***********************************************************************
++ * COMPILATION CONTROL FLAGS (see ef_vi.h for "workaround" controls)
++ */
++
++#define EF_VI_DO_MAGIC_CHECKS 1
++
++
++/**********************************************************************
++ * Headers
++ */
++
++#include <etherfabric/ef_vi.h>
++#include "sysdep.h"
++#include "ef_vi_falcon.h"
++
++
++/**********************************************************************
++ * Debugging.
++ */
++
++#ifndef NDEBUG
++
++# define _ef_assert(exp, file, line) BUG_ON(!(exp));
++
++# define _ef_assert2(exp, x, y, file, line) do { \
++ if (unlikely(!(exp))) \
++ BUG(); \
++ } while (0)
++
++#else
++
++# define _ef_assert(exp, file, line)
++# define _ef_assert2(e, x, y, file, line)
++
++#endif
++
++#define ef_assert(a) do{ _ef_assert((a),__FILE__,__LINE__); } while(0)
++#define ef_assert_equal(a,b) _ef_assert2((a)==(b),(a),(b),__FILE__,__LINE__)
++#define ef_assert_eq ef_assert_equal
++#define ef_assert_lt(a,b) _ef_assert2((a)<(b),(a),(b),__FILE__,__LINE__)
++#define ef_assert_le(a,b) _ef_assert2((a)<=(b),(a),(b),__FILE__,__LINE__)
++#define ef_assert_nequal(a,b) _ef_assert2((a)!=(b),(a),(b),__FILE__,__LINE__)
++#define ef_assert_ne ef_assert_nequal
++#define ef_assert_ge(a,b) _ef_assert2((a)>=(b),(a),(b),__FILE__,__LINE__)
++#define ef_assert_gt(a,b) _ef_assert2((a)>(b),(a),(b),__FILE__,__LINE__)
++
++/**********************************************************************
++ * Debug checks. ******************************************************
++ **********************************************************************/
++
++#ifdef NDEBUG
++# define EF_VI_MAGIC_SET(p, type)
++# define EF_VI_CHECK_VI(p)
++# define EF_VI_CHECK_EVENT_Q(p)
++# define EF_VI_CHECK_IOBUFSET(p)
++# define EF_VI_CHECK_FILTER(p)
++# define EF_VI_CHECK_SHMBUF(p)
++# define EF_VI_CHECK_PT_EP(p)
++#else
++# define EF_VI 0x3
++# define EF_EPLOCK 0x6
++# define EF_IOBUFSET 0x9
++# define EF_FILTER 0xa
++# define EF_SHMBUF 0x11
++
++# define EF_VI_MAGIC(p, type) \
++ (((unsigned)(type) << 28) | \
++ (((unsigned)(intptr_t)(p)) & 0x0fffffffu))
++
++# if !EF_VI_DO_MAGIC_CHECKS
++# define EF_VI_MAGIC_SET(p, type)
++# define EF_VI_MAGIC_CHECK(p, type)
++# else
++# define EF_VI_MAGIC_SET(p, type) \
++ do { \
++ (p)->magic = EF_VI_MAGIC((p), (type)); \
++ } while (0)
++
++# define EF_VI_MAGIC_OKAY(p, type) \
++ ((p)->magic == EF_VI_MAGIC((p), (type)))
++
++# define EF_VI_MAGIC_CHECK(p, type) \
++ ef_assert(EF_VI_MAGIC_OKAY((p), (type)))
++
++#endif /* EF_VI_DO_MAGIC_CHECKS */
++
++# define EF_VI_CHECK_VI(p) \
++ ef_assert(p); \
++ EF_VI_MAGIC_CHECK((p), EF_VI);
++
++# define EF_VI_CHECK_EVENT_Q(p) \
++ ef_assert(p); \
++ EF_VI_MAGIC_CHECK((p), EF_VI); \
++ ef_assert((p)->evq_base); \
++ ef_assert((p)->evq_mask);
++
++# define EF_VI_CHECK_PT_EP(p) \
++ ef_assert(p); \
++ EF_VI_MAGIC_CHECK((p), EF_VI); \
++ ef_assert((p)->ep_state);
++
++# define EF_VI_CHECK_IOBUFSET(p) \
++ ef_assert(p); \
++ EF_VI_MAGIC_CHECK((p), EF_IOBUFSET)
++
++# define EF_VI_CHECK_FILTER(p) \
++ ef_assert(p); \
++ EF_VI_MAGIC_CHECK((p), EF_FILTER);
++
++# define EF_VI_CHECK_SHMBUF(p) \
++ ef_assert(p); \
++ EF_VI_MAGIC_CHECK((p), EF_SHMBUF);
++
++#endif
++
++#ifndef NDEBUG
++# define EF_DRIVER_MAGIC 0x00f00ba4
++# define EF_ASSERT_THIS_DRIVER_VALID(driver) \
++ do{ ef_assert(driver); \
++ EF_VI_MAGIC_CHECK((driver), EF_DRIVER_MAGIC); \
++ ef_assert((driver)->init); }while(0)
++
++# define EF_ASSERT_DRIVER_VALID() EF_ASSERT_THIS_DRIVER_VALID(&ci_driver)
++#else
++# define EF_ASSERT_THIS_DRIVER_VALID(driver)
++# define EF_ASSERT_DRIVER_VALID()
++#endif
++
++
++/* *************************************
++ * Power of 2 FIFO
++ */
++
++#define EF_VI_FIFO2_M(f, x) ((x) & ((f)->fifo_mask))
++#define ef_vi_fifo2_valid(f) ((f) && (f)->fifo && (f)->fifo_mask > 0 && \
++ (f)->fifo_rd_i <= (f)->fifo_mask && \
++ (f)->fifo_wr_i <= (f)->fifo_mask && \
++ EF_VI_IS_POW2((f)->fifo_mask+1u))
++
++#define ef_vi_fifo2_init(f, cap) \
++ do{ ef_assert(EF_VI_IS_POW2((cap) + 1)); \
++ (f)->fifo_rd_i = (f)->fifo_wr_i = 0u; \
++ (f)->fifo_mask = (cap); \
++ }while(0)
++
++#define ef_vi_fifo2_is_empty(f) ((f)->fifo_rd_i == (f)->fifo_wr_i)
++#define ef_vi_fifo2_capacity(f) ((f)->fifo_mask)
++#define ef_vi_fifo2_buf_size(f) ((f)->fifo_mask + 1u)
++#define ef_vi_fifo2_end(f) ((f)->fifo + ef_vi_fifo2_buf_size(f))
++#define ef_vi_fifo2_peek(f) ((f)->fifo[(f)->fifo_rd_i])
++#define ef_vi_fifo2_poke(f) ((f)->fifo[(f)->fifo_wr_i])
++#define ef_vi_fifo2_num(f) EF_VI_FIFO2_M((f),(f)->fifo_wr_i-(f)->fifo_rd_i)
++
++#define ef_vi_fifo2_wr_prev(f) \
++ do{ (f)->fifo_wr_i = EF_VI_FIFO2_M((f), (f)->fifo_wr_i - 1u); }while(0)
++#define ef_vi_fifo2_wr_next(f) \
++ do{ (f)->fifo_wr_i = EF_VI_FIFO2_M((f), (f)->fifo_wr_i + 1u); }while(0)
++#define ef_vi_fifo2_rd_adv(f, n) \
++ do{ (f)->fifo_rd_i = EF_VI_FIFO2_M((f), (f)->fifo_rd_i + (n)); }while(0)
++#define ef_vi_fifo2_rd_prev(f) \
++ do{ (f)->fifo_rd_i = EF_VI_FIFO2_M((f), (f)->fifo_rd_i - 1u); }while(0)
++#define ef_vi_fifo2_rd_next(f) \
++ do{ (f)->fifo_rd_i = EF_VI_FIFO2_M((f), (f)->fifo_rd_i + 1u); }while(0)
++
++#define ef_vi_fifo2_put(f, v) \
++ do{ ef_vi_fifo2_poke(f) = (v); ef_vi_fifo2_wr_next(f); }while(0)
++#define ef_vi_fifo2_get(f, pv) \
++ do{ *(pv) = ef_vi_fifo2_peek(f); ef_vi_fifo2_rd_next(f); }while(0)
++
++
++/* *********************************************************************
++ * Eventq handling
++ */
++
++typedef union {
++ uint64_t u64;
++ struct {
++ uint32_t a;
++ uint32_t b;
++ } opaque;
++} ef_vi_event;
++
++
++#define EF_VI_EVENT_OFFSET(q, i) \
++ (((q)->evq_state->evq_ptr - (i) * sizeof(ef_vi_event)) & (q)->evq_mask)
++
++#define EF_VI_EVENT_PTR(q, i) \
++ ((ef_vi_event*) ((q)->evq_base + EF_VI_EVENT_OFFSET((q), (i))))
++
++/* *********************************************************************
++ * Miscellaneous goodies
++ */
++#ifdef NDEBUG
++# define EF_VI_DEBUG(x)
++#else
++# define EF_VI_DEBUG(x) x
++#endif
++
++#define EF_VI_ROUND_UP(i, align) (((i)+(align)-1u) & ~((align)-1u))
++#define EF_VI_ALIGN_FWD(p, align) (((p)+(align)-1u) & ~((align)-1u))
++#define EF_VI_ALIGN_BACK(p, align) ((p) & ~((align)-1u))
++#define EF_VI_PTR_ALIGN_BACK(p, align) \
++ ((char*)EF_VI_ALIGN_BACK(((intptr_t)(p)), ((intptr_t)(align))))
++#define EF_VI_IS_POW2(x) ((x) && ! ((x) & ((x) - 1)))
++
++
++/* ********************************************************************
++ */
++
++extern void falcon_vi_init(ef_vi*, void* vvis ) EF_VI_HF;
++extern void ef_eventq_state_init(ef_vi* evq) EF_VI_HF;
++extern void __ef_init(void) EF_VI_HF;
++
++
++#endif /* __CI_EF_VI_INTERNAL_H__ */
++
+Index: head-2008-11-25/drivers/xen/sfc_netfront/etherfabric/ef_vi.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/etherfabric/ef_vi.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,665 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \brief Virtual Interface
++ * \date 2007/05/16
++ */
++
++#ifndef __EFAB_EF_VI_H__
++#define __EFAB_EF_VI_H__
++
++
++/**********************************************************************
++ * Primitive types ****************************************************
++ **********************************************************************/
++
++/* We standardise on the types from stdint.h and synthesise these types
++ * for compilers/platforms that don't provide them */
++
++# include <linux/types.h>
++# define EF_VI_ALIGN(x) __attribute__ ((aligned (x)))
++# define ef_vi_inline static inline
++
++
++
++/**********************************************************************
++ * Types **************************************************************
++ **********************************************************************/
++
++typedef uint32_t ef_eventq_ptr;
++
++typedef uint64_t ef_addr;
++typedef char* ef_vi_ioaddr_t;
++
++/**********************************************************************
++ * ef_event ***********************************************************
++ **********************************************************************/
++
++/*! \i_ef_vi A DMA request identifier.
++**
++** This is an integer token specified by the transport and associated
++** with a DMA request. It is returned to the VI user with DMA completion
++** events. It is typically used to identify the buffer associated with
++** the transfer.
++*/
++typedef int ef_request_id;
++
++typedef union {
++ uint64_t u64[1];
++ uint32_t u32[2];
++} ef_vi_qword;
++
++typedef ef_vi_qword ef_hw_event;
++
++#define EF_REQUEST_ID_BITS 16u
++#define EF_REQUEST_ID_MASK ((1u << EF_REQUEST_ID_BITS) - 1u)
++
++/*! \i_ef_event An [ef_event] is a token that identifies something that
++** has happened. Examples include packets received, packets transmitted
++** and errors.
++*/
++typedef union {
++ struct {
++ ef_hw_event ev;
++ unsigned type :16;
++ } generic;
++ struct {
++ ef_hw_event ev;
++ unsigned type :16;
++ /*ef_request_id request_id :EF_REQUEST_ID_BITS;*/
++ unsigned q_id :16;
++ unsigned len :16;
++ unsigned flags :16;
++ } rx;
++ struct { /* This *must* have same layout as [rx]. */
++ ef_hw_event ev;
++ unsigned type :16;
++ /*ef_request_id request_id :EF_REQUEST_ID_BITS;*/
++ unsigned q_id :16;
++ unsigned len :16;
++ unsigned flags :16;
++ unsigned subtype :16;
++ } rx_discard;
++ struct {
++ ef_hw_event ev;
++ unsigned type :16;
++ /*ef_request_id request_id :EF_REQUEST_ID_BITS;*/
++ unsigned q_id :16;
++ } tx;
++ struct {
++ ef_hw_event ev;
++ unsigned type :16;
++ /*ef_request_id request_id :EF_REQUEST_ID_BITS;*/
++ unsigned q_id :16;
++ unsigned subtype :16;
++ } tx_error;
++ struct {
++ ef_hw_event ev;
++ unsigned type :16;
++ unsigned q_id :16;
++ } rx_no_desc_trunc;
++ struct {
++ ef_hw_event ev;
++ unsigned type :16;
++ unsigned data;
++ } sw;
++} ef_event;
++
++
++#define EF_EVENT_TYPE(e) ((e).generic.type)
++enum {
++ /** Good data was received. */
++ EF_EVENT_TYPE_RX,
++ /** Packets have been sent. */
++ EF_EVENT_TYPE_TX,
++ /** Data received and buffer consumed, but something is wrong. */
++ EF_EVENT_TYPE_RX_DISCARD,
++ /** Transmit of packet failed. */
++ EF_EVENT_TYPE_TX_ERROR,
++ /** Received packet was truncated due to lack of descriptors. */
++ EF_EVENT_TYPE_RX_NO_DESC_TRUNC,
++ /** Software generated event. */
++ EF_EVENT_TYPE_SW,
++ /** Event queue overflow. */
++ EF_EVENT_TYPE_OFLOW,
++};
++
++#define EF_EVENT_RX_BYTES(e) ((e).rx.len)
++#define EF_EVENT_RX_Q_ID(e) ((e).rx.q_id)
++#define EF_EVENT_RX_CONT(e) ((e).rx.flags & EF_EVENT_FLAG_CONT)
++#define EF_EVENT_RX_SOP(e) ((e).rx.flags & EF_EVENT_FLAG_SOP)
++#define EF_EVENT_RX_ISCSI_OKAY(e) ((e).rx.flags & EF_EVENT_FLAG_ISCSI_OK)
++#define EF_EVENT_FLAG_SOP 0x1
++#define EF_EVENT_FLAG_CONT 0x2
++#define EF_EVENT_FLAG_ISCSI_OK 0x4
++
++#define EF_EVENT_TX_Q_ID(e) ((e).tx.q_id)
++
++#define EF_EVENT_RX_DISCARD_Q_ID(e) ((e).rx_discard.q_id)
++#define EF_EVENT_RX_DISCARD_LEN(e) ((e).rx_discard.len)
++#define EF_EVENT_RX_DISCARD_TYPE(e) ((e).rx_discard.subtype)
++enum {
++ EF_EVENT_RX_DISCARD_CSUM_BAD,
++ EF_EVENT_RX_DISCARD_CRC_BAD,
++ EF_EVENT_RX_DISCARD_TRUNC,
++ EF_EVENT_RX_DISCARD_RIGHTS,
++ EF_EVENT_RX_DISCARD_OTHER,
++};
++
++#define EF_EVENT_TX_ERROR_Q_ID(e) ((e).tx_error.q_id)
++#define EF_EVENT_TX_ERROR_TYPE(e) ((e).tx_error.subtype)
++enum {
++ EF_EVENT_TX_ERROR_RIGHTS,
++ EF_EVENT_TX_ERROR_OFLOW,
++ EF_EVENT_TX_ERROR_2BIG,
++ EF_EVENT_TX_ERROR_BUS,
++};
++
++#define EF_EVENT_RX_NO_DESC_TRUNC_Q_ID(e) ((e).rx_no_desc_trunc.q_id)
++
++#define EF_EVENT_SW_DATA_MASK 0xffff
++#define EF_EVENT_SW_DATA(e) ((e).sw.data)
++
++#define EF_EVENT_FMT "[ev:%x:%08x:%08x]"
++#define EF_EVENT_PRI_ARG(e) (unsigned) (e).generic.type, \
++ (unsigned) (e).generic.ev.u32[1], \
++ (unsigned) (e).generic.ev.u32[0]
++
++#define EF_GET_HW_EV(e) ((e).generic.ev)
++#define EF_GET_HW_EV_PTR(e) (&(e).generic.ev)
++#define EF_GET_HW_EV_U64(e) ((e).generic.ev.u64[0])
++
++
++/* ***************** */
++
++/*! Used by netif shared state. Must use types of explicit size. */
++typedef struct {
++ uint16_t rx_last_desc_ptr; /* for RX duplicates */
++ uint8_t bad_sop; /* bad SOP detected */
++ uint8_t frag_num; /* next fragment #, 0=>SOP */
++} ef_rx_dup_state_t;
++
++
++/* Max number of ports on any SF NIC. */
++#define EFAB_DMAQS_PER_EVQ_MAX 32
++
++typedef struct {
++ ef_eventq_ptr evq_ptr;
++ int32_t trashed;
++ ef_rx_dup_state_t rx_dup_state[EFAB_DMAQS_PER_EVQ_MAX];
++} ef_eventq_state;
++
++
++/*! \i_ef_base [ef_iovec] is similar the standard [struct iovec]. An
++** array of these is used to designate a scatter/gather list of I/O
++** buffers.
++*/
++typedef struct {
++ ef_addr iov_base EF_VI_ALIGN(8);
++ unsigned iov_len;
++} ef_iovec;
++
++/* Falcon constants */
++#define TX_EV_DESC_PTR_LBN 0
++
++/**********************************************************************
++ * ef_iobufset ********************************************************
++ **********************************************************************/
++
++/*! \i_ef_bufs An [ef_iobufset] is a collection of buffers to be used
++** with the NIC.
++*/
++typedef struct ef_iobufset {
++ unsigned magic;
++ unsigned bufs_mmap_bytes;
++ unsigned bufs_handle;
++ int bufs_ptr_off;
++ ef_addr bufs_addr;
++ unsigned bufs_size; /* size rounded to pow2 */
++ int bufs_num;
++ int faultonaccess;
++} ef_iobufset;
++
++
++/**********************************************************************
++ * ef_vi **************************************************************
++ **********************************************************************/
++
++enum ef_vi_flags {
++ EF_VI_RX_SCATTER = 0x1,
++ EF_VI_ISCSI_RX_HDIG = 0x2,
++ EF_VI_ISCSI_TX_HDIG = 0x4,
++ EF_VI_ISCSI_RX_DDIG = 0x8,
++ EF_VI_ISCSI_TX_DDIG = 0x10,
++ EF_VI_TX_PHYS_ADDR = 0x20,
++ EF_VI_RX_PHYS_ADDR = 0x40,
++ EF_VI_TX_IP_CSUM_DIS = 0x80,
++ EF_VI_TX_TCPUDP_CSUM_DIS= 0x100,
++ EF_VI_TX_TCPUDP_ONLY = 0x200,
++ /* Flags in range 0xXXXX0000 are for internal use. */
++};
++
++typedef struct {
++ uint32_t added;
++ uint32_t removed;
++} ef_vi_txq_state;
++
++typedef struct {
++ uint32_t added;
++ uint32_t removed;
++} ef_vi_rxq_state;
++
++typedef struct {
++ uint32_t mask;
++ void* doorbell;
++ void* descriptors;
++ uint16_t* ids;
++ unsigned misalign_mask;
++} ef_vi_txq;
++
++typedef struct {
++ uint32_t mask;
++ void* doorbell;
++ void* descriptors;
++ uint16_t* ids;
++} ef_vi_rxq;
++
++typedef struct {
++ ef_eventq_state evq;
++ ef_vi_txq_state txq;
++ ef_vi_rxq_state rxq;
++ /* Followed by request id fifos. */
++} ef_vi_state;
++
++/*! \i_ef_vi A virtual interface.
++**
++** An [ef_vi] represents a virtual interface on a specific NIC. A
++** virtual interface is a collection of an event queue and two DMA queues
++** used to pass Ethernet frames between the transport implementation and
++** the network.
++*/
++typedef struct ef_vi {
++ unsigned magic;
++
++ unsigned vi_resource_id;
++ unsigned vi_resource_handle_hack;
++ unsigned vi_i;
++
++ char* vi_mem_mmap_ptr;
++ int vi_mem_mmap_bytes;
++ char* vi_io_mmap_ptr;
++ int vi_io_mmap_bytes;
++
++ ef_eventq_state* evq_state;
++ char* evq_base;
++ unsigned evq_mask;
++ ef_vi_ioaddr_t evq_timer_reg;
++
++ ef_vi_txq vi_txq;
++ ef_vi_rxq vi_rxq;
++ ef_vi_state* ep_state;
++ enum ef_vi_flags vi_flags;
++} ef_vi;
++
++
++enum ef_vi_arch {
++ EF_VI_ARCH_FALCON,
++};
++
++
++struct ef_vi_nic_type {
++ unsigned char arch;
++ char variant;
++ unsigned char revision;
++};
++
++
++/* This structure is opaque to the client & used to pass mapping data
++ * from the resource manager to the ef_vi lib. for ef_vi_init().
++ */
++struct vi_mappings {
++ uint32_t signature;
++# define VI_MAPPING_VERSION 0x02 /*Byte: Increment me if struct altered*/
++# define VI_MAPPING_SIGNATURE (0xBA1150 + VI_MAPPING_VERSION)
++
++ struct ef_vi_nic_type nic_type;
++
++ int vi_instance;
++
++ unsigned evq_bytes;
++ char* evq_base;
++ ef_vi_ioaddr_t evq_timer_reg;
++
++ unsigned rx_queue_capacity;
++ ef_vi_ioaddr_t rx_dma_ef1;
++ char* rx_dma_falcon;
++ ef_vi_ioaddr_t rx_bell;
++
++ unsigned tx_queue_capacity;
++ ef_vi_ioaddr_t tx_dma_ef1;
++ char* tx_dma_falcon;
++ ef_vi_ioaddr_t tx_bell;
++};
++/* This is used by clients to allocate a suitably sized buffer for the
++ * resource manager to fill & ef_vi_init() to use. */
++#define VI_MAPPINGS_SIZE (sizeof(struct vi_mappings))
++
++
++/**********************************************************************
++ * ef_config **********************************************************
++ **********************************************************************/
++
++struct ef_config_t {
++ int log; /* debug logging level */
++};
++
++extern struct ef_config_t ef_config;
++
++
++/**********************************************************************
++ * ef_vi **************************************************************
++ **********************************************************************/
++
++/* Initialise [data_area] with information required to initialise an ef_vi.
++ * In the following, an unused param should be set to NULL. Note the case
++ * marked (*) of [iobuf_mmap] for falcon/driver; for normal driver this
++ * must be NULL.
++ *
++ * \param data_area [in,out] required, must ref at least VI_MAPPINGS_SIZE
++ * bytes
++ * \param evq_capacity [in] number of events in event queue. Specify 0 for
++ * no event queue.
++ * \param rxq_capacity [in] number of descriptors in RX DMA queue. Specify
++ * 0 for no RX queue.
++ * \param txq_capacity [in] number of descriptors in TX DMA queue. Specify
++ * 0 for no TX queue.
++ * \param mmap_info [in] mem-map info for resource
++ * \param io_mmap [in] ef1, required
++ * falcon, required
++ * \param iobuf_mmap [in] ef1, UL: unused
++ * falcon, UL: required
++ */
++extern void ef_vi_init_mapping_vi(void* data_area, struct ef_vi_nic_type,
++ unsigned rxq_capacity,
++ unsigned txq_capacity, int instance,
++ void* io_mmap, void* iobuf_mmap_rx,
++ void* iobuf_mmap_tx, enum ef_vi_flags);
++
++
++extern void ef_vi_init_mapping_evq(void* data_area, struct ef_vi_nic_type,
++ int instance, unsigned evq_bytes,
++ void* base, void* timer_reg);
++
++ef_vi_inline unsigned ef_vi_resource_id(ef_vi* vi)
++{
++ return vi->vi_resource_id;
++}
++
++ef_vi_inline enum ef_vi_flags ef_vi_flags(ef_vi* vi)
++{
++ return vi->vi_flags;
++}
++
++
++/**********************************************************************
++ * Receive interface **************************************************
++ **********************************************************************/
++
++/*! \i_ef_vi Returns the amount of space in the RX descriptor ring.
++**
++** \return the amount of space in the queue.
++*/
++ef_vi_inline int ef_vi_receive_space(ef_vi* vi)
++{
++ ef_vi_rxq_state* qs = &vi->ep_state->rxq;
++ return vi->vi_rxq.mask - (qs->added - qs->removed);
++}
++
++
++/*! \i_ef_vi Returns the fill level of the RX descriptor ring.
++**
++** \return the fill level of the queue.
++*/
++ef_vi_inline int ef_vi_receive_fill_level(ef_vi* vi)
++{
++ ef_vi_rxq_state* qs = &vi->ep_state->rxq;
++ return qs->added - qs->removed;
++}
++
++
++ef_vi_inline int ef_vi_receive_capacity(ef_vi* vi)
++{
++ return vi->vi_rxq.mask;
++}
++
++/*! \i_ef_vi Complete a receive operation.
++**
++** When a receive completion event is received, it should be passed to
++** this function. The request-id for the buffer that the packet was
++** delivered to is returned.
++**
++** After this function returns, more space may be available in the
++** receive queue.
++*/
++extern ef_request_id ef_vi_receive_done(const ef_vi*, const ef_event*);
++
++/*! \i_ef_vi Return request ID indicated by a receive event
++ */
++ef_vi_inline ef_request_id ef_vi_receive_request_id(const ef_vi* vi,
++ const ef_event* ef_ev)
++{
++ const ef_vi_qword* ev = EF_GET_HW_EV_PTR(*ef_ev);
++ return ev->u32[0] & vi->vi_rxq.mask;
++}
++
++
++/*! \i_ef_vi Form a receive descriptor.
++**
++** If \c initial_rx_bytes is zero use a reception size at least as large
++** as an MTU.
++*/
++extern int ef_vi_receive_init(ef_vi* vi, ef_addr addr, ef_request_id dma_id,
++ int intial_rx_bytes);
++
++/*! \i_ef_vi Submit initialised receive descriptors to the NIC. */
++extern void ef_vi_receive_push(ef_vi* vi);
++
++/*! \i_ef_vi Post a buffer on the receive queue.
++**
++** \return 0 on success, or -EAGAIN if the receive queue is full
++*/
++extern int ef_vi_receive_post(ef_vi*, ef_addr addr,
++ ef_request_id dma_id);
++
++/**********************************************************************
++ * Transmit interface *************************************************
++ **********************************************************************/
++
++/*! \i_ef_vi Return the amount of space (in descriptors) in the transmit
++** queue.
++**
++** \return the amount of space in the queue (in descriptors)
++*/
++ef_vi_inline int ef_vi_transmit_space(ef_vi* vi)
++{
++ ef_vi_txq_state* qs = &vi->ep_state->txq;
++ return vi->vi_txq.mask - (qs->added - qs->removed);
++}
++
++
++/*! \i_ef_vi Returns the fill level of the TX descriptor ring.
++**
++** \return the fill level of the queue.
++*/
++ef_vi_inline int ef_vi_transmit_fill_level(ef_vi* vi)
++{
++ ef_vi_txq_state* qs = &vi->ep_state->txq;
++ return qs->added - qs->removed;
++}
++
++
++/*! \i_ef_vi Returns the total capacity of the TX descriptor ring.
++**
++** \return the capacity of the queue.
++*/
++ef_vi_inline int ef_vi_transmit_capacity(ef_vi* vi)
++{
++ return vi->vi_txq.mask;
++}
++
++
++/*! \i_ef_vi Transmit a packet.
++**
++** \param bytes must be greater than ETH_ZLEN.
++** \return -EAGAIN if the transmit queue is full, or 0 on success
++*/
++extern int ef_vi_transmit(ef_vi*, ef_addr, int bytes, ef_request_id dma_id);
++
++/*! \i_ef_vi Transmit a packet using a gather list.
++**
++** \param iov_len must be greater than zero
++** \param iov the first must be non-zero in length (but others need not)
++**
++** \return -EAGAIN if the queue is full, or 0 on success
++*/
++extern int ef_vi_transmitv(ef_vi*, const ef_iovec* iov, int iov_len,
++ ef_request_id dma_id);
++
++/*! \i_ef_vi Initialise a DMA request.
++**
++** \return -EAGAIN if the queue is full, or 0 on success
++*/
++extern int ef_vi_transmit_init(ef_vi*, ef_addr, int bytes,
++ ef_request_id dma_id);
++
++/*! \i_ef_vi Initialise a DMA request.
++**
++** \return -EAGAIN if the queue is full, or 0 on success
++*/
++extern int ef_vi_transmitv_init(ef_vi*, const ef_iovec*, int iov_len,
++ ef_request_id dma_id);
++
++/*! \i_ef_vi Submit DMA requests to the NIC.
++**
++** The DMA requests must have been initialised using
++** ef_vi_transmit_init() or ef_vi_transmitv_init().
++*/
++extern void ef_vi_transmit_push(ef_vi*);
++
++
++/*! \i_ef_vi Maximum number of transmit completions per transmit event. */
++#define EF_VI_TRANSMIT_BATCH 64
++
++/*! \i_ef_vi Determine the set of [ef_request_id]s for each DMA request
++** which has been completed by a given transmit completion
++** event.
++**
++** \param ids must point to an array of length EF_VI_TRANSMIT_BATCH
++** \return the number of valid [ef_request_id]s (can be zero)
++*/
++extern int ef_vi_transmit_unbundle(ef_vi* ep, const ef_event*,
++ ef_request_id* ids);
++
++
++/*! \i_ef_event Returns true if ef_eventq_poll() will return event(s). */
++extern int ef_eventq_has_event(ef_vi* vi);
++
++/*! \i_ef_event Returns true if there are quite a few events in the event
++** queue.
++**
++** This looks ahead in the event queue, so has the property that it will
++** not ping-pong a cache-line when it is called concurrently with events
++** being delivered.
++*/
++extern int ef_eventq_has_many_events(ef_vi* evq, int look_ahead);
++
++/*! Type of function to handle unknown events arriving on event queue
++** Return CI_TRUE iff the event has been handled.
++*/
++typedef int/*bool*/ ef_event_handler_fn(void* priv, ef_vi* evq, ef_event* ev);
++
++/*! Standard poll exception routine */
++extern int/*bool*/ ef_eventq_poll_exception(void* priv, ef_vi* evq,
++ ef_event* ev);
++
++/*! \i_ef_event Retrieve events from the event queue, handle RX/TX events
++** and pass any others to an exception handler function
++**
++** \return The number of events retrieved.
++*/
++extern int ef_eventq_poll_evs(ef_vi* evq, ef_event* evs, int evs_len,
++ ef_event_handler_fn *exception, void *expt_priv);
++
++/*! \i_ef_event Retrieve events from the event queue.
++**
++** \return The number of events retrieved.
++*/
++ef_vi_inline int ef_eventq_poll(ef_vi* evq, ef_event* evs, int evs_len)
++{
++ return ef_eventq_poll_evs(evq, evs, evs_len,
++ &ef_eventq_poll_exception, (void*)0);
++}
++
++/*! \i_ef_event Returns the capacity of an event queue. */
++ef_vi_inline int ef_eventq_capacity(ef_vi* vi)
++{
++ return (vi->evq_mask + 1u) / sizeof(ef_hw_event);
++}
++
++/* Returns the instance ID of [vi] */
++ef_vi_inline unsigned ef_vi_instance(ef_vi* vi)
++{ return vi->vi_i; }
++
++
++/**********************************************************************
++ * Initialisation *****************************************************
++ **********************************************************************/
++
++/*! Return size of state buffer of an initialised VI. */
++extern int ef_vi_state_bytes(ef_vi*);
++
++/*! Return size of buffer needed for VI state given sizes of RX and TX
++** DMA queues. Queue sizes must be legal sizes (power of 2), or 0 (no
++** queue).
++*/
++extern int ef_vi_calc_state_bytes(int rxq_size, int txq_size);
++
++/*! Initialise [ef_vi] from the provided resources. [vvis] must have been
++** created by ef_make_vi_data() & remains owned by the caller.
++*/
++extern void ef_vi_init(ef_vi*, void* vi_info, ef_vi_state* state,
++ ef_eventq_state* evq_state, enum ef_vi_flags);
++
++extern void ef_vi_state_init(ef_vi*);
++extern void ef_eventq_state_init(ef_vi*);
++
++/*! Convert an efhw device arch to ef_vi_arch, or returns -1 if not
++** recognised.
++*/
++extern int ef_vi_arch_from_efhw_arch(int efhw_arch);
++
++
++#endif /* __EFAB_EF_VI_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/falcon_event.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/falcon_event.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,346 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr
++ * \brief Routine to poll event queues.
++ * \date 2003/03/04
++ */
++
++/*! \cidoxg_lib_ef */
++#include "ef_vi_internal.h"
++
++/* Be worried about this on byteswapped machines */
++/* Due to crazy chipsets, we see the event words being written in
++** arbitrary order (bug4539). So test for presence of event must ensure
++** that both halves have changed from the null.
++*/
++# define EF_VI_IS_EVENT(evp) \
++ ( (((evp)->opaque.a != (uint32_t)-1) && \
++ ((evp)->opaque.b != (uint32_t)-1)) )
++
++
++#ifdef NDEBUG
++# define IS_DEBUG 0
++#else
++# define IS_DEBUG 1
++#endif
++
++
++/*! Check for RX events with inconsistent SOP/CONT
++**
++** Returns true if this event should be discarded
++*/
++ef_vi_inline int ef_eventq_is_rx_sop_cont_bad_efab(ef_vi* vi,
++ const ef_vi_qword* ev)
++{
++ ef_rx_dup_state_t* rx_dup_state;
++ uint8_t* bad_sop;
++
++ unsigned label = QWORD_GET_U(RX_EV_Q_LABEL, *ev);
++ unsigned sop = QWORD_TEST_BIT(RX_SOP, *ev);
++
++ ef_assert(vi);
++ ef_assert_lt(label, EFAB_DMAQS_PER_EVQ_MAX);
++
++ rx_dup_state = &vi->evq_state->rx_dup_state[label];
++ bad_sop = &rx_dup_state->bad_sop;
++
++ if( ! ((vi->vi_flags & EF_VI_BUG5692_WORKAROUND) || IS_DEBUG) ) {
++ *bad_sop = (*bad_sop && !sop);
++ }
++ else {
++ unsigned cont = QWORD_TEST_BIT(RX_JUMBO_CONT, *ev);
++ uint8_t *frag_num = &rx_dup_state->frag_num;
++
++ /* bad_sop should latch till the next sop */
++ *bad_sop = (*bad_sop && !sop) || ( !!sop != (*frag_num==0) );
++
++ /* we do not check the number of bytes relative to the
++ * fragment number and size of the user rx buffer here
++ * because we don't know the size of the user rx
++ * buffer - we probably should perform this check in
++ * the nearest code calling this though.
++ */
++ *frag_num = cont ? (*frag_num + 1) : 0;
++ }
++
++ return *bad_sop;
++}
++
++
++ef_vi_inline int falcon_rx_check_dup(ef_vi* evq, ef_event* ev_out,
++ const ef_vi_qword* ev)
++{
++ unsigned q_id = QWORD_GET_U(RX_EV_Q_LABEL, *ev);
++ unsigned desc_ptr = QWORD_GET_U(RX_EV_DESC_PTR, *ev);
++ ef_rx_dup_state_t* rx_dup_state = &evq->evq_state->rx_dup_state[q_id];
++
++ if(likely( desc_ptr != rx_dup_state->rx_last_desc_ptr )) {
++ rx_dup_state->rx_last_desc_ptr = desc_ptr;
++ return 0;
++ }
++
++ rx_dup_state->rx_last_desc_ptr = desc_ptr;
++ rx_dup_state->bad_sop = 1;
++#ifndef NDEBUG
++ rx_dup_state->frag_num = 0;
++#endif
++ BUG_ON(!QWORD_TEST_BIT(RX_EV_FRM_TRUNC, *ev));
++ BUG_ON( QWORD_TEST_BIT(RX_EV_PKT_OK, *ev));
++ BUG_ON(!QWORD_GET_U(RX_EV_BYTE_CNT, *ev) == 0);
++ ev_out->rx_no_desc_trunc.type = EF_EVENT_TYPE_RX_NO_DESC_TRUNC;
++ ev_out->rx_no_desc_trunc.q_id = q_id;
++ return 1;
++}
++
++
++ef_vi_inline void falcon_rx_event(ef_event* ev_out, const ef_vi_qword* ev)
++{
++ if(likely( QWORD_TEST_BIT(RX_EV_PKT_OK, *ev) )) {
++ ev_out->rx.type = EF_EVENT_TYPE_RX;
++ ev_out->rx.q_id = QWORD_GET_U(RX_EV_Q_LABEL, *ev);
++ ev_out->rx.len = QWORD_GET_U(RX_EV_BYTE_CNT, *ev);
++ if( QWORD_TEST_BIT(RX_SOP, *ev) )
++ ev_out->rx.flags = EF_EVENT_FLAG_SOP;
++ else
++ ev_out->rx.flags = 0;
++ if( QWORD_TEST_BIT(RX_JUMBO_CONT, *ev) )
++ ev_out->rx.flags |= EF_EVENT_FLAG_CONT;
++ if( QWORD_TEST_BIT(RX_iSCSI_PKT_OK, *ev) )
++ ev_out->rx.flags |= EF_EVENT_FLAG_ISCSI_OK;
++ }
++ else {
++ ev_out->rx_discard.type = EF_EVENT_TYPE_RX_DISCARD;
++ ev_out->rx_discard.q_id = QWORD_GET_U(RX_EV_Q_LABEL, *ev);
++ ev_out->rx_discard.len = QWORD_GET_U(RX_EV_BYTE_CNT, *ev);
++#if 1 /* hack for ptloop compatability: ?? TODO purge */
++ if( QWORD_TEST_BIT(RX_SOP, *ev) )
++ ev_out->rx_discard.flags = EF_EVENT_FLAG_SOP;
++ else
++ ev_out->rx_discard.flags = 0;
++ if( QWORD_TEST_BIT(RX_JUMBO_CONT, *ev) )
++ ev_out->rx_discard.flags |= EF_EVENT_FLAG_CONT;
++ if( QWORD_TEST_BIT(RX_iSCSI_PKT_OK, *ev) )
++ ev_out->rx_discard.flags |= EF_EVENT_FLAG_ISCSI_OK;
++#endif
++ /* Order matters here: more fundamental errors first. */
++ if( QWORD_TEST_BIT(RX_EV_BUF_OWNER_ID_ERR, *ev) )
++ ev_out->rx_discard.subtype =
++ EF_EVENT_RX_DISCARD_RIGHTS;
++ else if( QWORD_TEST_BIT(RX_EV_FRM_TRUNC, *ev) )
++ ev_out->rx_discard.subtype =
++ EF_EVENT_RX_DISCARD_TRUNC;
++ else if( QWORD_TEST_BIT(RX_EV_ETH_CRC_ERR, *ev) )
++ ev_out->rx_discard.subtype =
++ EF_EVENT_RX_DISCARD_CRC_BAD;
++ else if( QWORD_TEST_BIT(RX_EV_IP_HDR_CHKSUM_ERR, *ev) )
++ ev_out->rx_discard.subtype =
++ EF_EVENT_RX_DISCARD_CSUM_BAD;
++ else if( QWORD_TEST_BIT(RX_EV_TCP_UDP_CHKSUM_ERR, *ev) )
++ ev_out->rx_discard.subtype =
++ EF_EVENT_RX_DISCARD_CSUM_BAD;
++ else
++ ev_out->rx_discard.subtype =
++ EF_EVENT_RX_DISCARD_OTHER;
++ }
++}
++
++
++ef_vi_inline void falcon_tx_event(ef_event* ev_out, const ef_vi_qword* ev)
++{
++ /* Danger danger! No matter what we ask for wrt batching, we
++ ** will get a batched event every 16 descriptors, and we also
++ ** get dma-queue-empty events. i.e. Duplicates are expected.
++ **
++ ** In addition, if it's been requested in the descriptor, we
++ ** get an event per descriptor. (We don't currently request
++ ** this).
++ */
++ if(likely( QWORD_TEST_BIT(TX_EV_COMP, *ev) )) {
++ ev_out->tx.type = EF_EVENT_TYPE_TX;
++ ev_out->tx.q_id = QWORD_GET_U(TX_EV_Q_LABEL, *ev);
++ }
++ else {
++ ev_out->tx_error.type = EF_EVENT_TYPE_TX_ERROR;
++ ev_out->tx_error.q_id = QWORD_GET_U(TX_EV_Q_LABEL, *ev);
++ if(likely( QWORD_TEST_BIT(TX_EV_BUF_OWNER_ID_ERR, *ev) ))
++ ev_out->tx_error.subtype = EF_EVENT_TX_ERROR_RIGHTS;
++ else if(likely( QWORD_TEST_BIT(TX_EV_WQ_FF_FULL, *ev) ))
++ ev_out->tx_error.subtype = EF_EVENT_TX_ERROR_OFLOW;
++ else if(likely( QWORD_TEST_BIT(TX_EV_PKT_TOO_BIG, *ev) ))
++ ev_out->tx_error.subtype = EF_EVENT_TX_ERROR_2BIG;
++ else if(likely( QWORD_TEST_BIT(TX_EV_PKT_ERR, *ev) ))
++ ev_out->tx_error.subtype = EF_EVENT_TX_ERROR_BUS;
++ }
++}
++
++
++static void mark_bad(ef_event* ev)
++{
++ ev->generic.ev.u64[0] &=~ ((uint64_t) 1u << RX_EV_PKT_OK_LBN);
++}
++
++
++int ef_eventq_poll_evs(ef_vi* evq, ef_event* evs, int evs_len,
++ ef_event_handler_fn *exception, void *expt_priv)
++{
++ int evs_len_orig = evs_len;
++
++ EF_VI_CHECK_EVENT_Q(evq);
++ ef_assert(evs);
++ ef_assert_gt(evs_len, 0);
++
++ if(unlikely( EF_VI_IS_EVENT(EF_VI_EVENT_PTR(evq, 1)) ))
++ goto overflow;
++
++ do {
++ { /* Read the event out of the ring, then fiddle with
++ * copied version. Reason is that the ring is
++ * likely to get pushed out of cache by another
++ * event being delivered by hardware. */
++ ef_vi_event* ev = EF_VI_EVENT_PTR(evq, 0);
++ if( ! EF_VI_IS_EVENT(ev) )
++ break;
++ evs->generic.ev.u64[0] = cpu_to_le64 (ev->u64);
++ evq->evq_state->evq_ptr += sizeof(ef_vi_event);
++ ev->u64 = (uint64_t)(int64_t) -1;
++ }
++
++ /* Ugly: Exploit the fact that event code lies in top
++ * bits of event. */
++ ef_assert_ge(EV_CODE_LBN, 32u);
++ switch( evs->generic.ev.u32[1] >> (EV_CODE_LBN - 32u) ) {
++ case RX_IP_EV_DECODE:
++ /* Look for duplicate desc_ptr: it signals
++ * that a jumbo frame was truncated because we
++ * ran out of descriptors. */
++ if(unlikely( falcon_rx_check_dup
++ (evq, evs, &evs->generic.ev) )) {
++ --evs_len;
++ ++evs;
++ break;
++ }
++ else {
++ /* Cope with FalconA1 bugs where RX
++ * gives inconsistent RX events Mark
++ * events as bad until SOP becomes
++ * consistent again
++ * ef_eventq_is_rx_sop_cont_bad() has
++ * side effects - order is important
++ */
++ if(unlikely
++ (ef_eventq_is_rx_sop_cont_bad_efab
++ (evq, &evs->generic.ev) )) {
++ mark_bad(evs);
++ }
++ }
++ falcon_rx_event(evs, &evs->generic.ev);
++ --evs_len;
++ ++evs;
++ break;
++
++ case TX_IP_EV_DECODE:
++ falcon_tx_event(evs, &evs->generic.ev);
++ --evs_len;
++ ++evs;
++ break;
++
++ default:
++ break;
++ }
++ } while( evs_len );
++
++ return evs_len_orig - evs_len;
++
++
++ overflow:
++ evs->generic.type = EF_EVENT_TYPE_OFLOW;
++ evs->generic.ev.u64[0] = (uint64_t)((int64_t)-1);
++ return 1;
++}
++
++
++int/*bool*/ ef_eventq_poll_exception(void* priv, ef_vi* evq, ef_event* ev)
++{
++ int /*bool*/ handled = 0;
++
++ switch( ev->generic.ev.u32[1] >> (EV_CODE_LBN - 32u) ) {
++ case DRIVER_EV_DECODE:
++ if( QWORD_GET_U(DRIVER_EV_SUB_CODE, ev->generic.ev) ==
++ EVQ_INIT_DONE_EV_DECODE )
++ /* EVQ initialised event: ignore. */
++ handled = 1;
++ break;
++ }
++ return handled;
++}
++
++
++void ef_eventq_iterate(ef_vi* vi,
++ void (*fn)(void* arg, ef_vi*, int rel_pos,
++ int abs_pos, void* event),
++ void* arg, int stop_at_end)
++{
++ int i, size_evs = (vi->evq_mask + 1) / sizeof(ef_vi_event);
++
++ for( i = 0; i < size_evs; ++i ) {
++ ef_vi_event* e = EF_VI_EVENT_PTR(vi, -i);
++ if( EF_VI_IS_EVENT(e) )
++ fn(arg, vi, i,
++ EF_VI_EVENT_OFFSET(vi, -i) / sizeof(ef_vi_event),
++ e);
++ else if( stop_at_end )
++ break;
++ }
++}
++
++
++int ef_eventq_has_event(ef_vi* vi)
++{
++ return EF_VI_IS_EVENT(EF_VI_EVENT_PTR(vi, 0));
++}
++
++
++int ef_eventq_has_many_events(ef_vi* vi, int look_ahead)
++{
++ ef_assert_ge(look_ahead, 0);
++ return EF_VI_IS_EVENT(EF_VI_EVENT_PTR(vi, -look_ahead));
++}
++
++
++int ef_eventq_has_rx_event(ef_vi* vi)
++{
++ ef_vi_event* ev;
++ int i, n_evs = 0;
++
++ for( i = 0; EF_VI_IS_EVENT(EF_VI_EVENT_PTR(vi, i)); --i ) {
++ ev = EF_VI_EVENT_PTR(vi, i);
++ if( EFVI_FALCON_EVENT_CODE(ev) == EF_EVENT_TYPE_RX ) n_evs++;
++ }
++ return n_evs;
++}
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/falcon_vi.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/falcon_vi.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,465 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr, stg
++ * \brief Falcon-specific VI
++ * \date 2006/11/30
++ */
++
++#include "ef_vi_internal.h"
++
++
++#define EFVI_FALCON_DMA_TX_FRAG 1
++
++
++/* TX descriptor for both physical and virtual packet transfers */
++typedef union {
++ uint32_t dword[2];
++} ef_vi_falcon_dma_tx_buf_desc;
++typedef ef_vi_falcon_dma_tx_buf_desc ef_vi_falcon_dma_tx_phys_desc;
++
++
++/* RX descriptor for physical addressed transfers */
++typedef union {
++ uint32_t dword[2];
++} ef_vi_falcon_dma_rx_phys_desc;
++
++
++/* RX descriptor for virtual packet transfers */
++typedef struct {
++ uint32_t dword[1];
++} ef_vi_falcon_dma_rx_buf_desc;
++
++/* Buffer table index */
++typedef uint32_t ef_vi_buffer_addr_t;
++
++ef_vi_inline int64_t dma_addr_to_u46(int64_t src_dma_addr)
++{
++ return (src_dma_addr & __FALCON_MASK(46, int64_t));
++}
++
++/*! Setup a physical address based descriptor with a specified length */
++ef_vi_inline void
++__falcon_dma_rx_calc_ip_phys(ef_vi_dma_addr_t dest_pa,
++ ef_vi_falcon_dma_rx_phys_desc *desc,
++ int bytes)
++{
++ int region = 0; /* TODO fixme */
++ int64_t dest = dma_addr_to_u46(dest_pa); /* lower 46 bits */
++
++ DWCHCK(__DW2(RX_KER_BUF_SIZE_LBN), RX_KER_BUF_SIZE_WIDTH);
++ DWCHCK(__DW2(RX_KER_BUF_REGION_LBN),RX_KER_BUF_REGION_WIDTH);
++
++ LWCHK(RX_KER_BUF_ADR_LBN, RX_KER_BUF_ADR_WIDTH);
++
++ RANGECHCK(bytes, RX_KER_BUF_SIZE_WIDTH);
++ RANGECHCK(region, RX_KER_BUF_REGION_WIDTH);
++
++ ef_assert(desc);
++
++ desc->dword[1] = ((bytes << __DW2(RX_KER_BUF_SIZE_LBN)) |
++ (region << __DW2(RX_KER_BUF_REGION_LBN)) |
++ (HIGH(dest,
++ RX_KER_BUF_ADR_LBN,
++ RX_KER_BUF_ADR_WIDTH)));
++
++ desc->dword[0] = LOW(dest,
++ RX_KER_BUF_ADR_LBN,
++ RX_KER_BUF_ADR_WIDTH);
++}
++
++/*! Setup a virtual buffer descriptor for an IPMODE transfer */
++ef_vi_inline void
++__falcon_dma_tx_calc_ip_buf(unsigned buf_id, unsigned buf_ofs, unsigned bytes,
++ int port, int frag,
++ ef_vi_falcon_dma_tx_buf_desc *desc)
++{
++ DWCHCK(__DW2(TX_USR_PORT_LBN), TX_USR_PORT_WIDTH);
++ DWCHCK(__DW2(TX_USR_CONT_LBN), TX_USR_CONT_WIDTH);
++ DWCHCK(__DW2(TX_USR_BYTE_CNT_LBN), TX_USR_BYTE_CNT_WIDTH);
++ LWCHK(RX_KER_BUF_ADR_LBN, RX_KER_BUF_ADR_WIDTH);
++ DWCHCK(TX_USR_BYTE_OFS_LBN, TX_USR_BYTE_OFS_WIDTH);
++
++ RANGECHCK(bytes, TX_USR_BYTE_CNT_WIDTH);
++ RANGECHCK(port, TX_USR_PORT_WIDTH);
++ RANGECHCK(frag, TX_USR_CONT_WIDTH);
++ RANGECHCK(buf_id, TX_USR_BUF_ID_WIDTH);
++ RANGECHCK(buf_ofs, TX_USR_BYTE_OFS_WIDTH);
++
++ ef_assert(desc);
++
++ desc->dword[1] = ((port << __DW2(TX_USR_PORT_LBN)) |
++ (frag << __DW2(TX_USR_CONT_LBN)) |
++ (bytes << __DW2(TX_USR_BYTE_CNT_LBN)) |
++ (HIGH(buf_id,
++ TX_USR_BUF_ID_LBN,
++ TX_USR_BUF_ID_WIDTH)));
++
++ desc->dword[0] = ((LOW(buf_id,
++ TX_USR_BUF_ID_LBN,
++ (TX_USR_BUF_ID_WIDTH))) |
++ (buf_ofs << TX_USR_BYTE_OFS_LBN));
++}
++
++ef_vi_inline void
++falcon_dma_tx_calc_ip_buf_4k(unsigned buf_vaddr, unsigned bytes,
++ int port, int frag,
++ ef_vi_falcon_dma_tx_buf_desc *desc)
++{
++ /* TODO FIXME [buf_vaddr] consists of the buffer index in the
++ ** high bits, and an offset in the low bits. Assumptions
++ ** permate the code that these can be rolled into one 32bit
++ ** value, so this is currently preserved for Falcon. But we
++ ** should change to support 8K pages
++ */
++ unsigned buf_id = EFVI_FALCON_BUFFER_4K_PAGE(buf_vaddr);
++ unsigned buf_ofs = EFVI_FALCON_BUFFER_4K_OFF(buf_vaddr);
++
++ __falcon_dma_tx_calc_ip_buf( buf_id, buf_ofs, bytes, port, frag, desc);
++}
++
++ef_vi_inline void
++falcon_dma_tx_calc_ip_buf(unsigned buf_vaddr, unsigned bytes, int port,
++ int frag, ef_vi_falcon_dma_tx_buf_desc *desc)
++{
++ falcon_dma_tx_calc_ip_buf_4k(buf_vaddr, bytes, port, frag, desc);
++}
++
++/*! Setup a virtual buffer based descriptor */
++ef_vi_inline void
++__falcon_dma_rx_calc_ip_buf(unsigned buf_id, unsigned buf_ofs,
++ ef_vi_falcon_dma_rx_buf_desc *desc)
++{
++ /* check alignment of buffer offset and pack */
++ ef_assert((buf_ofs & 0x1) == 0);
++
++ buf_ofs >>= 1;
++
++ DWCHCK(RX_USR_2BYTE_OFS_LBN, RX_USR_2BYTE_OFS_WIDTH);
++ DWCHCK(RX_USR_BUF_ID_LBN, RX_USR_BUF_ID_WIDTH);
++
++ RANGECHCK(buf_ofs, RX_USR_2BYTE_OFS_WIDTH);
++ RANGECHCK(buf_id, RX_USR_BUF_ID_WIDTH);
++
++ ef_assert(desc);
++
++ desc->dword[0] = ((buf_ofs << RX_USR_2BYTE_OFS_LBN) |
++ (buf_id << RX_USR_BUF_ID_LBN));
++}
++
++ef_vi_inline void
++falcon_dma_rx_calc_ip_buf_4k(unsigned buf_vaddr,
++ ef_vi_falcon_dma_rx_buf_desc *desc)
++{
++ /* TODO FIXME [buf_vaddr] consists of the buffer index in the
++ ** high bits, and an offset in the low bits. Assumptions
++ ** permeate the code that these can be rolled into one 32bit
++ ** value, so this is currently preserved for Falcon. But we
++ ** should change to support 8K pages
++ */
++ unsigned buf_id = EFVI_FALCON_BUFFER_4K_PAGE(buf_vaddr);
++ unsigned buf_ofs = EFVI_FALCON_BUFFER_4K_OFF(buf_vaddr);
++
++ __falcon_dma_rx_calc_ip_buf(buf_id, buf_ofs, desc);
++}
++
++ef_vi_inline void
++falcon_dma_rx_calc_ip_buf(unsigned buf_vaddr,
++ ef_vi_falcon_dma_rx_buf_desc *desc)
++{
++ falcon_dma_rx_calc_ip_buf_4k(buf_vaddr, desc);
++}
++
++
++ef_vi_inline ef_vi_dma_addr_t ef_physaddr(ef_addr efaddr)
++{
++ return (ef_vi_dma_addr_t) efaddr;
++}
++
++
++/*! Convert between an ef_addr and a buffer table index
++** Assert that this was not a physical address
++*/
++ef_vi_inline ef_vi_buffer_addr_t ef_bufaddr(ef_addr efaddr)
++{
++ ef_assert(efaddr < ((uint64_t)1 << 32) );
++
++ return (ef_vi_buffer_addr_t) efaddr;
++}
++
++
++/*! Setup an physical address based descriptor for an IPMODE transfer */
++ef_vi_inline void
++falcon_dma_tx_calc_ip_phys(ef_vi_dma_addr_t src_dma_addr, unsigned bytes,
++ int port, int frag,
++ ef_vi_falcon_dma_tx_phys_desc *desc)
++{
++
++ int region = 0; /* FIXME */
++ int64_t src = dma_addr_to_u46(src_dma_addr); /* lower 46 bits */
++
++ DWCHCK(__DW2(TX_KER_PORT_LBN), TX_KER_PORT_WIDTH);
++ DWCHCK(__DW2(TX_KER_CONT_LBN), TX_KER_CONT_WIDTH);
++ DWCHCK(__DW2(TX_KER_BYTE_CNT_LBN), TX_KER_BYTE_CNT_WIDTH);
++ DWCHCK(__DW2(TX_KER_BUF_REGION_LBN),TX_KER_BUF_REGION_WIDTH);
++
++ LWCHK(TX_KER_BUF_ADR_LBN, TX_KER_BUF_ADR_WIDTH);
++
++ RANGECHCK(port, TX_KER_PORT_WIDTH);
++ RANGECHCK(frag, TX_KER_CONT_WIDTH);
++ RANGECHCK(bytes, TX_KER_BYTE_CNT_WIDTH);
++ RANGECHCK(region, TX_KER_BUF_REGION_WIDTH);
++
++ desc->dword[1] = ((port << __DW2(TX_KER_PORT_LBN)) |
++ (frag << __DW2(TX_KER_CONT_LBN)) |
++ (bytes << __DW2(TX_KER_BYTE_CNT_LBN)) |
++ (region << __DW2(TX_KER_BUF_REGION_LBN)) |
++ (HIGH(src,
++ TX_KER_BUF_ADR_LBN,
++ TX_KER_BUF_ADR_WIDTH)));
++
++ ef_assert_equal(TX_KER_BUF_ADR_LBN, 0);
++ desc->dword[0] = (uint32_t) src_dma_addr;
++}
++
++
++void falcon_vi_init(ef_vi* vi, void* vvis)
++{
++ struct vi_mappings *vm = (struct vi_mappings*)vvis;
++ uint16_t* ids;
++
++ ef_assert(vi);
++ ef_assert(vvis);
++ ef_assert_equal(vm->signature, VI_MAPPING_SIGNATURE);
++ ef_assert_equal(vm->nic_type.arch, EF_VI_ARCH_FALCON);
++
++ /* Initialise masks to zero, so that ef_vi_state_init() will
++ ** not do any harm when we don't have DMA queues. */
++ vi->vi_rxq.mask = vi->vi_txq.mask = 0;
++
++ /* Used for BUG5391_WORKAROUND. */
++ vi->vi_txq.misalign_mask = 0;
++
++ /* Initialise doorbell addresses to a distinctive small value
++ ** which will cause a segfault, to trap doorbell pushes to VIs
++ ** without DMA queues. */
++ vi->vi_rxq.doorbell = vi->vi_txq.doorbell = (ef_vi_ioaddr_t)0xdb;
++
++ ids = (uint16_t*) (vi->ep_state + 1);
++
++ if( vm->tx_queue_capacity ) {
++ vi->vi_txq.mask = vm->tx_queue_capacity - 1;
++ vi->vi_txq.doorbell = vm->tx_bell + 12;
++ vi->vi_txq.descriptors = vm->tx_dma_falcon;
++ vi->vi_txq.ids = ids;
++ ids += vi->vi_txq.mask + 1;
++ /* Check that the id fifo fits in the space allocated. */
++ ef_assert_le((char*) (vi->vi_txq.ids + vm->tx_queue_capacity),
++ (char*) vi->ep_state
++ + ef_vi_calc_state_bytes(vm->rx_queue_capacity,
++ vm->tx_queue_capacity));
++ }
++ if( vm->rx_queue_capacity ) {
++ vi->vi_rxq.mask = vm->rx_queue_capacity - 1;
++ vi->vi_rxq.doorbell = vm->rx_bell + 12;
++ vi->vi_rxq.descriptors = vm->rx_dma_falcon;
++ vi->vi_rxq.ids = ids;
++ /* Check that the id fifo fits in the space allocated. */
++ ef_assert_le((char*) (vi->vi_rxq.ids + vm->rx_queue_capacity),
++ (char*) vi->ep_state
++ + ef_vi_calc_state_bytes(vm->rx_queue_capacity,
++ vm->tx_queue_capacity));
++ }
++
++ if( vm->nic_type.variant == 'A' ) {
++ vi->vi_txq.misalign_mask = 15; /* BUG5391_WORKAROUND */
++ vi->vi_flags |= EF_VI_BUG5692_WORKAROUND;
++ }
++}
++
++
++int ef_vi_transmitv_init(ef_vi* vi, const ef_iovec* iov, int iov_len,
++ ef_request_id dma_id)
++{
++ ef_vi_txq* q = &vi->vi_txq;
++ ef_vi_txq_state* qs = &vi->ep_state->txq;
++ ef_vi_falcon_dma_tx_buf_desc* dp;
++ unsigned len, dma_len, di;
++ unsigned added_save = qs->added;
++ ef_addr dma_addr;
++ unsigned last_len = 0;
++
++ ef_assert(iov_len > 0);
++ ef_assert(iov);
++ ef_assert_equal((dma_id & EF_REQUEST_ID_MASK), dma_id);
++ ef_assert_nequal(dma_id, 0xffff);
++
++ dma_addr = iov->iov_base;
++ len = iov->iov_len;
++
++ if( vi->vi_flags & EF_VI_ISCSI_TX_DDIG ) {
++ /* Last 4 bytes of placeholder for digest must be
++ * removed for h/w */
++ ef_assert(len > 4);
++ last_len = iov[iov_len - 1].iov_len;
++ if( last_len <= 4 ) {
++ ef_assert(iov_len > 1);
++ --iov_len;
++ last_len = iov[iov_len - 1].iov_len - (4 - last_len);
++ }
++ else {
++ last_len = iov[iov_len - 1].iov_len - 4;
++ }
++ if( iov_len == 1 )
++ len = last_len;
++ }
++
++ while( 1 ) {
++ if( qs->added - qs->removed >= q->mask ) {
++ qs->added = added_save;
++ return -EAGAIN;
++ }
++
++ dma_len = (~((unsigned) dma_addr) & 0xfff) + 1;
++ if( dma_len > len ) dma_len = len;
++ { /* BUG5391_WORKAROUND */
++ unsigned misalign =
++ (unsigned) dma_addr & q->misalign_mask;
++ if( misalign && dma_len + misalign > 512 )
++ dma_len = 512 - misalign;
++ }
++
++ di = qs->added++ & q->mask;
++ dp = (ef_vi_falcon_dma_tx_buf_desc*) q->descriptors + di;
++ if( vi->vi_flags & EF_VI_TX_PHYS_ADDR )
++ falcon_dma_tx_calc_ip_phys
++ (ef_physaddr(dma_addr), dma_len, /*port*/ 0,
++ (iov_len == 1 && dma_len == len) ? 0 :
++ EFVI_FALCON_DMA_TX_FRAG, dp);
++ else
++ falcon_dma_tx_calc_ip_buf
++ (ef_bufaddr(dma_addr), dma_len, /*port*/ 0,
++ (iov_len == 1 && dma_len == len) ? 0 :
++ EFVI_FALCON_DMA_TX_FRAG, dp);
++
++ dma_addr += dma_len;
++ len -= dma_len;
++
++ if( len == 0 ) {
++ if( --iov_len == 0 ) break;
++ ++iov;
++ dma_addr = iov->iov_base;
++ len = iov->iov_len;
++ if( (vi->vi_flags & EF_VI_ISCSI_TX_DDIG) &&
++ (iov_len == 1) )
++ len = last_len;
++ }
++ }
++
++ q->ids[di] = (uint16_t) dma_id;
++ return 0;
++}
++
++
++void ef_vi_transmit_push(ef_vi* vi)
++{
++ ef_vi_wiob();
++ writel((vi->ep_state->txq.added & vi->vi_txq.mask) <<
++ __DW4(TX_DESC_WPTR_LBN),
++ vi->vi_txq.doorbell);
++}
++
++
++/*! The value of initial_rx_bytes is used to set RX_KER_BUF_SIZE in an initial
++** receive descriptor here if physical addressing is being used. A value of
++** zero represents 16384 bytes. This is okay, because caller must provide a
++** buffer than is > MTU, and mac should filter anything bigger than that.
++*/
++int ef_vi_receive_init(ef_vi* vi, ef_addr addr, ef_request_id dma_id,
++ int initial_rx_bytes)
++{
++ ef_vi_rxq* q = &vi->vi_rxq;
++ ef_vi_rxq_state* qs = &vi->ep_state->rxq;
++ unsigned di;
++
++ if( ef_vi_receive_space(vi) ) {
++ di = qs->added++ & q->mask;
++ ef_assert_equal(q->ids[di], 0xffff);
++ q->ids[di] = (uint16_t) dma_id;
++
++ if( ! (vi->vi_flags & EF_VI_RX_PHYS_ADDR) ) {
++ ef_vi_falcon_dma_rx_buf_desc* dp;
++ dp = (ef_vi_falcon_dma_rx_buf_desc*)
++ q->descriptors + di;
++ falcon_dma_rx_calc_ip_buf(ef_bufaddr(addr), dp);
++ }
++ else {
++ ef_vi_falcon_dma_rx_phys_desc* dp;
++ dp = (ef_vi_falcon_dma_rx_phys_desc*)
++ q->descriptors + di;
++ __falcon_dma_rx_calc_ip_phys(addr, dp,
++ initial_rx_bytes);
++ }
++
++ return 0;
++ }
++
++ return -EAGAIN;
++}
++
++
++void ef_vi_receive_push(ef_vi* vi)
++{
++ ef_vi_wiob();
++ writel ((vi->ep_state->rxq.added & vi->vi_rxq.mask) <<
++ __DW4(RX_DESC_WPTR_LBN),
++ vi->vi_rxq.doorbell);
++}
++
++
++ef_request_id ef_vi_receive_done(const ef_vi* vi, const ef_event* ef_ev)
++{
++ const ef_vi_qword* ev = EF_GET_HW_EV_PTR(*ef_ev);
++ unsigned di = ev->u32[0] & vi->vi_rxq.mask;
++ ef_request_id rq_id;
++
++ ef_assert(EF_EVENT_TYPE(*ef_ev) == EF_EVENT_TYPE_RX ||
++ EF_EVENT_TYPE(*ef_ev) == EF_EVENT_TYPE_RX_DISCARD);
++
++ /* Detect spurious / duplicate RX events. We may need to modify this
++ ** code so that we are robust if they happen. */
++ ef_assert_equal(di, vi->ep_state->rxq.removed & vi->vi_rxq.mask);
++
++ /* We only support 1 port: so events should be in order. */
++ ef_assert(vi->vi_rxq.ids[di] != 0xffff);
++
++ rq_id = vi->vi_rxq.ids[di];
++ vi->vi_rxq.ids[di] = 0xffff;
++ ++vi->ep_state->rxq.removed;
++ return rq_id;
++}
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/pt_tx.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/pt_tx.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,91 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr
++ * \brief Packet-mode transmit interface.
++ * \date 2003/04/02
++ */
++
++/*! \cidoxg_lib_ef */
++#include "ef_vi_internal.h"
++
++
++int ef_vi_transmit_init(ef_vi* vi, ef_addr base, int len, ef_request_id dma_id)
++{
++ ef_iovec iov = { base, len };
++ return ef_vi_transmitv_init(vi, &iov, 1, dma_id);
++}
++
++
++int ef_vi_transmit(ef_vi* vi, ef_addr base, int len, ef_request_id dma_id)
++{
++ ef_iovec iov = { base, len };
++ int rc = ef_vi_transmitv_init(vi, &iov, 1, dma_id);
++ if( rc == 0 ) ef_vi_transmit_push(vi);
++ return rc;
++}
++
++
++int ef_vi_transmitv(ef_vi* vi, const ef_iovec* iov, int iov_len,
++ ef_request_id dma_id)
++{
++ int rc = ef_vi_transmitv_init(vi, iov, iov_len, dma_id);
++ if( rc == 0 ) ef_vi_transmit_push(vi);
++ return rc;
++}
++
++
++int ef_vi_transmit_unbundle(ef_vi* vi, const ef_event* __ev,
++ ef_request_id* ids)
++{
++ ef_request_id* ids_in = ids;
++ ef_vi_txq* q = &vi->vi_txq;
++ ef_vi_txq_state* qs = &vi->ep_state->txq;
++ const ef_vi_qword* ev = EF_GET_HW_EV_PTR(*__ev);
++ unsigned i, stop = (ev->u32[0] + 1) & q->mask;
++
++ ef_assert(EF_EVENT_TYPE(*__ev) == EF_EVENT_TYPE_TX ||
++ EF_EVENT_TYPE(*__ev) == EF_EVENT_TYPE_TX_ERROR);
++
++ /* Shouldn't be batching more than 64 descriptors, and should not go
++ ** backwards. */
++ ef_assert_le((((ev->u32[0] + 1) - qs->removed) & q->mask), 64);
++ /* Should not complete more than we've posted. */
++ ef_assert_le((((ev->u32[0] + 1) - qs->removed) & q->mask),
++ qs->added - qs->removed);
++
++ for( i = qs->removed & q->mask; i != stop; i = ++qs->removed & q->mask )
++ if( q->ids[i] != 0xffff ) {
++ *ids++ = q->ids[i];
++ q->ids[i] = 0xffff;
++ }
++
++ ef_assert_le(ids - ids_in, EF_VI_TRANSMIT_BATCH);
++
++ return (int) (ids - ids_in);
++}
++
++/*! \cidoxg_end */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/sysdep.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/sysdep.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,184 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author stg
++ * \brief System dependent support for ef vi lib
++ * \date 2007/05/10
++ */
++
++/*! \cidoxg_include_ci_ul */
++#ifndef __CI_CIUL_SYSDEP_LINUX_H__
++#define __CI_CIUL_SYSDEP_LINUX_H__
++
++/**********************************************************************
++ * Kernel version compatability
++ */
++
++#if defined(__GNUC__)
++
++/* Linux kernel doesn't have stdint.h or [u]intptr_t. */
++# if !defined(LINUX_VERSION_CODE)
++# include <linux/version.h>
++# endif
++# include <asm/io.h>
++
++/* In Linux 2.6.24, linux/types.h has uintptr_t */
++# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
++# if BITS_PER_LONG == 32
++ typedef __u32 uintptr_t;
++# else
++ typedef __u64 uintptr_t;
++# endif
++# endif
++
++/* But even 2.6.24 doesn't define intptr_t */
++# if BITS_PER_LONG == 32
++ typedef __s32 intptr_t;
++# else
++ typedef __s64 intptr_t;
++# endif
++
++# if defined(__ia64__)
++# define EF_VI_PRIx64 "lx"
++# else
++# define EF_VI_PRIx64 "llx"
++# endif
++
++# define EF_VI_HF __attribute__((visibility("hidden")))
++# define EF_VI_HV __attribute__((visibility("hidden")))
++
++# if defined(__i386__) || defined(__x86_64__) /* GCC x86/x64 */
++ typedef unsigned long long ef_vi_dma_addr_t;
++# if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
++# define ef_vi_wiob() __asm__ __volatile__ ("sfence")
++# else
++# define ef_vi_wiob() __asm__ __volatile__ (".byte 0x0F, 0xAE, 0xF8")
++# endif
++
++# endif
++#endif
++
++#ifdef EFX_NOT_UPSTREAM
++
++/* Stuff for architectures/compilers not officially supported */
++
++#if !defined(__GNUC__)
++# if defined(__PPC__) /* GCC, PPC */
++ typedef unsigned long ef_vi_dma_addr_t;
++# define ef_vi_wiob() wmb()
++
++# ifdef __powerpc64__
++# ifdef CONFIG_SMP
++# define CI_SMP_SYNC "\n eieio \n" /* memory cache sync */
++# define CI_SMP_ISYNC "\n isync \n" /* instr cache sync */
++# else
++# define CI_SMP_SYNC
++# define CI_SMP_ISYNC
++# endif
++# else /* for ppc32 systems */
++# ifdef CONFIG_SMP
++# define CI_SMP_SYNC "\n eieio \n"
++# define CI_SMP_ISYNC "\n sync \n"
++# else
++# define CI_SMP_SYNC
++# define CI_SMP_ISYNC
++# endif
++# endif
++
++# elif defined(__ia64__) /* GCC, IA64 */
++ typedef unsigned long ef_vi_dma_addr_t;
++# define ef_vi_wiob() __asm__ __volatile__("mf.a": : :"memory")
++
++# else
++# error Unknown processor - GNU C
++# endif
++
++#elif defined(__PGI)
++# error PGI not supported
++
++#elif defined(__INTEL_COMPILER)
++
++/* Intel compilers v7 claim to be very gcc compatible. */
++# if __INTEL_COMPILER >= 700
++# if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ > 91)
++# define EF_VI_LIKELY(t) __builtin_expect((t), 1)
++# define EF_VI_UNLIKELY(t) __builtin_expect((t), 0)
++# endif
++
++# if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
++# define ef_vi_wiob() __asm__ __volatile__ ("sfence")
++# else
++# define ef_vi_wiob() __asm__ __volatile__ (".byte 0x0F, 0xAE, 0xF8")
++# endif
++
++# else
++# error Old Intel compiler not supported.
++# endif
++
++#else
++# error Unknown compiler.
++#endif
++
++#endif
++
++
++# include <linux/errno.h>
++
++
++/**********************************************************************
++ * Extracting bit fields.
++ */
++
++#define _QWORD_GET_LOW(f, v) \
++ (((v).u32[0] >> (f##_LBN)) & ((1u << f##_WIDTH) - 1u))
++#define _QWORD_GET_HIGH(f, v) \
++ (((v).u32[1] >> (f##_LBN - 32u)) & ((1u << f##_WIDTH) - 1u))
++#define _QWORD_GET_ANY(f, v) \
++ (((v).u64[0] >> f##_LBN) & (((uint64_t) 1u << f##_WIDTH) - 1u))
++
++#define QWORD_GET(f, v) \
++ ((f##_LBN + f##_WIDTH) <= 32u \
++ ? _QWORD_GET_LOW(f, (v)) \
++ : ((f##_LBN >= 32u) ? _QWORD_GET_HIGH(f, (v)) : _QWORD_GET_ANY(f, (v))))
++
++#define QWORD_GET_U(f, v) ((unsigned) QWORD_GET(f, (v)))
++
++#define _QWORD_TEST_BIT_LOW(f, v) ((v).u32[0] & (1u << (f##_LBN)))
++#define _QWORD_TEST_BIT_HIGH(f, v) ((v).u32[1] & (1u << (f##_LBN - 32u)))
++
++#define QWORD_TEST_BIT(f, v) \
++ (f##_LBN < 32 ? _QWORD_TEST_BIT_LOW(f, (v)) : _QWORD_TEST_BIT_HIGH(f, (v)))
++
++
++
++
++#ifndef DECLSPEC_NORETURN
++/* normally defined on Windows to expand to a declaration that the
++ function will not return */
++# define DECLSPEC_NORETURN
++#endif
++
++#endif /* __CI_CIUL_SYSDEP_LINUX_H__ */
+Index: head-2008-11-25/drivers/xen/sfc_netfront/vi_init.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netfront/vi_init.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,183 @@
++/****************************************************************************
++ * Copyright 2002-2005: Level 5 Networks Inc.
++ * Copyright 2005-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications
++ * <linux-xen-drivers@solarflare.com>
++ * <onload-dev@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * \author djr
++ * \brief Initialisation of VIs.
++ * \date 2007/06/08
++ */
++
++#include "ef_vi_internal.h"
++
++#define EF_VI_STATE_BYTES(rxq_sz, txq_sz) \
++ (sizeof(ef_vi_state) + (rxq_sz) * sizeof(uint16_t) \
++ + (txq_sz) * sizeof(uint16_t))
++
++int ef_vi_calc_state_bytes(int rxq_sz, int txq_sz)
++{
++ ef_assert(rxq_sz == 0 || EF_VI_IS_POW2(rxq_sz));
++ ef_assert(txq_sz == 0 || EF_VI_IS_POW2(txq_sz));
++
++ return EF_VI_STATE_BYTES(rxq_sz, txq_sz);
++}
++
++
++int ef_vi_state_bytes(ef_vi* vi)
++{
++ int rxq_sz = 0, txq_sz = 0;
++ if( ef_vi_receive_capacity(vi) )
++ rxq_sz = ef_vi_receive_capacity(vi) + 1;
++ if( ef_vi_transmit_capacity(vi) )
++ txq_sz = ef_vi_transmit_capacity(vi) + 1;
++
++ ef_assert(rxq_sz == 0 || EF_VI_IS_POW2(rxq_sz));
++ ef_assert(txq_sz == 0 || EF_VI_IS_POW2(txq_sz));
++
++ return EF_VI_STATE_BYTES(rxq_sz, txq_sz);
++}
++
++
++void ef_eventq_state_init(ef_vi* evq)
++{
++ int j;
++
++ for (j = 0; j<EFAB_DMAQS_PER_EVQ_MAX; j++) {
++ ef_rx_dup_state_t *rx_dup_state =
++ &evq->evq_state->rx_dup_state[j];
++ rx_dup_state->bad_sop = 0;
++ rx_dup_state->rx_last_desc_ptr = -1;
++ rx_dup_state->frag_num = 0;
++ }
++
++ evq->evq_state->evq_ptr = 0;
++}
++
++
++void ef_vi_state_init(ef_vi* vi)
++{
++ ef_vi_state* state = vi->ep_state;
++ unsigned i;
++
++ state->txq.added = state->txq.removed = 0;
++ state->rxq.added = state->rxq.removed = 0;
++
++ if( vi->vi_rxq.mask )
++ for( i = 0; i <= vi->vi_rxq.mask; ++i )
++ vi->vi_rxq.ids[i] = (uint16_t) -1;
++ if( vi->vi_txq.mask )
++ for( i = 0; i <= vi->vi_txq.mask; ++i )
++ vi->vi_txq.ids[i] = (uint16_t) -1;
++}
++
++
++void ef_vi_init_mapping_evq(void* data_area, struct ef_vi_nic_type nic_type,
++ int instance, unsigned evq_bytes, void* base,
++ void* timer_reg)
++{
++ struct vi_mappings* vm = (struct vi_mappings*) data_area;
++
++ vm->signature = VI_MAPPING_SIGNATURE;
++ vm->vi_instance = instance;
++ vm->nic_type = nic_type;
++ vm->evq_bytes = evq_bytes;
++ vm->evq_base = base;
++ vm->evq_timer_reg = timer_reg;
++}
++
++
++void ef_vi_init(ef_vi* vi, void* vvis, ef_vi_state* state,
++ ef_eventq_state* evq_state, enum ef_vi_flags vi_flags)
++{
++ struct vi_mappings* vm = (struct vi_mappings*) vvis;
++
++ vi->vi_i = vm->vi_instance;
++ vi->ep_state = state;
++ vi->vi_flags = vi_flags;
++
++ switch( vm->nic_type.arch ) {
++ case EF_VI_ARCH_FALCON:
++ falcon_vi_init(vi, vvis);
++ break;
++ default:
++ /* ?? TODO: We should return an error code. */
++ ef_assert(0);
++ break;
++ }
++
++ if( vm->evq_bytes ) {
++ vi->evq_state = evq_state;
++ vi->evq_mask = vm->evq_bytes - 1u;
++ vi->evq_base = vm->evq_base;
++ vi->evq_timer_reg = vm->evq_timer_reg;
++ }
++
++ EF_VI_MAGIC_SET(vi, EF_VI);
++}
++
++
++/* Initialise [data_area] with information required to initialise an ef_vi.
++ * In the following, an unused param should be set to NULL. Note the case
++ * marked (*) of [iobuf_mmap] for falcon/driver; for the normal driver this
++ * must be NULL.
++ *
++ * \param data_area [in,out] required, must ref at least VI_MAPPING_SIZE
++ * bytes
++ * \param io_mmap [in] ef1, required
++ * falcon, required
++ * \param iobuf_mmap [in] ef1, unused
++ * falcon, required
++ */
++void ef_vi_init_mapping_vi(void* data_area, struct ef_vi_nic_type nic_type,
++ unsigned rxq_capacity, unsigned txq_capacity,
++ int instance, void* io_mmap,
++ void* iobuf_mmap_rx, void* iobuf_mmap_tx,
++ enum ef_vi_flags vi_flags)
++{
++ struct vi_mappings* vm = (struct vi_mappings*) data_area;
++ int rx_desc_bytes, rxq_bytes;
++
++ ef_assert(rxq_capacity > 0 || txq_capacity > 0);
++ ef_assert(vm);
++ ef_assert(io_mmap);
++ ef_assert(iobuf_mmap_rx || iobuf_mmap_tx);
++
++ vm->signature = VI_MAPPING_SIGNATURE;
++ vm->vi_instance = instance;
++ vm->nic_type = nic_type;
++
++ rx_desc_bytes = (vi_flags & EF_VI_RX_PHYS_ADDR) ? 8 : 4;
++ rxq_bytes = rxq_capacity * rx_desc_bytes;
++ rxq_bytes = (rxq_bytes + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
++
++ if( iobuf_mmap_rx == iobuf_mmap_tx )
++ iobuf_mmap_tx = (char*) iobuf_mmap_rx + rxq_bytes;
++
++ vm->rx_queue_capacity = rxq_capacity;
++ vm->rx_dma_falcon = iobuf_mmap_rx;
++ vm->rx_bell = (char*) io_mmap + (RX_DESC_UPD_REG_KER_OFST & 4095);
++ vm->tx_queue_capacity = txq_capacity;
++ vm->tx_dma_falcon = iobuf_mmap_tx;
++ vm->tx_bell = (char*) io_mmap + (TX_DESC_UPD_REG_KER_OFST & 4095);
++}
+Index: head-2008-11-25/drivers/xen/sfc_netutil/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netutil/Makefile 2008-02-26 10:54:12.000000000 +0100
+@@ -0,0 +1,11 @@
++EXTRA_CFLAGS += -Idrivers/xen/sfc_netutil
++EXTRA_CFLAGS += -Werror
++
++ifdef GGOV
++EXTRA_CFLAGS += -fprofile-arcs -ftest-coverage -DEFX_GCOV
++endif
++
++obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_UTIL) := sfc_netutil.o
++
++sfc_netutil-objs := accel_cuckoo_hash.o accel_msg_iface.o accel_util.o
++
+Index: head-2008-11-25/drivers/xen/sfc_netutil/accel_cuckoo_hash.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netutil/accel_cuckoo_hash.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,651 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/types.h> /* needed for linux/random.h */
++#include <linux/random.h>
++
++#include "accel_cuckoo_hash.h"
++#include "accel_util.h"
++
++static inline int cuckoo_hash_key_compare(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key1,
++ cuckoo_hash_key *key2)
++{
++ return !memcmp(key1, key2, hashtab->key_length);
++}
++
++
++static inline void cuckoo_hash_key_set(cuckoo_hash_key *key1,
++ cuckoo_hash_key *key2)
++{
++ *key1 = *key2;
++}
++
++
++/*
++ * Sets hash function parameters. Chooses "a" to be odd, 0 < a < 2^w
++ * where w is the length of the key
++ */
++static void set_hash_parameters(cuckoo_hash_table *hashtab)
++{
++ again:
++ hashtab->a0 = hashtab->a1 = 0;
++
++ /* Make sure random */
++ get_random_bytes(&hashtab->a0, hashtab->key_length);
++ get_random_bytes(&hashtab->a1, hashtab->key_length);
++
++ /* Make sure odd */
++ hashtab->a0 |= 1;
++ hashtab->a1 |= 1;
++
++ /* Being different is good */
++ if (hashtab->a0 != hashtab->a1)
++ return;
++
++ goto again;
++}
++
++int cuckoo_hash_init(cuckoo_hash_table *hashtab, unsigned length_bits,
++ unsigned key_length)
++{
++ char *table_mem;
++ unsigned length = 1 << length_bits;
++
++ BUG_ON(length_bits >= sizeof(unsigned) * 8);
++ BUG_ON(key_length > sizeof(cuckoo_hash_key));
++
++ table_mem = kmalloc(sizeof(cuckoo_hash_entry) * 2 * length, GFP_KERNEL);
++
++ if (table_mem == NULL)
++ return -ENOMEM;
++
++ hashtab->length = length;
++ hashtab->length_bits = length_bits;
++ hashtab->key_length = key_length;
++ hashtab->entries = 0;
++
++ hashtab->table0 = (cuckoo_hash_entry *)table_mem;
++ hashtab->table1 = (cuckoo_hash_entry *)
++ (table_mem + length * sizeof(cuckoo_hash_entry));
++
++ set_hash_parameters(hashtab);
++
++ /* Zero the table */
++ memset(hashtab->table0, 0, length * 2 * sizeof(cuckoo_hash_entry));
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_init);
++
++void cuckoo_hash_destroy(cuckoo_hash_table *hashtab)
++{
++ if (hashtab->table0 != NULL)
++ kfree(hashtab->table0);
++}
++
++EXPORT_SYMBOL_GPL(cuckoo_hash_destroy);
++
++/*
++ * This computes sizeof(cuckoo_hash) bits of hash, not all will be
++ * necessarily used, but the hash function throws away any that
++ * aren't
++ */
++static inline void cuckoo_compute_hash_helper(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *a,
++ cuckoo_hash_key *x,
++ cuckoo_hash *result)
++{
++ u64 multiply_result = 0, a_temp, x_temp;
++ u32 carry = 0;
++ u32 *a_words;
++ u32 *x_words;
++ int i;
++
++ /*
++ * As the mod and div operations in the function effectively
++ * reduce and shift the bits of the product down to just the
++ * third word, we need only compute that and return it as a
++ * result.
++ *
++ * Do enough long multiplication to get the word we need
++ */
++
++ /* This assumes things about the sizes of the key and hash */
++ BUG_ON(hashtab->key_length % sizeof(u32) != 0);
++ BUG_ON(sizeof(cuckoo_hash) != sizeof(u32));
++
++ a_words = (u32 *)a;
++ x_words = (u32 *)x;
++
++ for (i = 0; i < hashtab->key_length / sizeof(u32); i++) {
++ a_temp = a_words[i];
++ x_temp = x_words[i];
++
++ multiply_result = (a_temp * x_temp) + carry;
++ carry = (multiply_result >> 32) & 0xffffffff;
++ }
++
++ *result = multiply_result & 0xffffffff;
++}
++
++
++/*
++ * Want to implement (ax mod 2^w) div 2^(w-q) for odd a, 0 < a < 2^w;
++ * w is the length of the key, q is the length of the hash, I think.
++ * See http://www.it-c.dk/people/pagh/papers/cuckoo-jour.pdf
++ */
++static cuckoo_hash cuckoo_compute_hash(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key,
++ cuckoo_hash_key *a)
++{
++ unsigned q = hashtab->length_bits;
++ unsigned shift = 32 - q;
++ unsigned mask = ((1 << q) - 1) << shift;
++ cuckoo_hash hash;
++
++ cuckoo_compute_hash_helper(hashtab, a, key, &hash);
++
++ /*
++ * Take the top few bits to get the right length for this
++ * hash table
++ */
++ hash = (hash & mask) >> shift;
++
++ BUG_ON(hash >= hashtab->length);
++
++ return hash;
++}
++
++
++static int cuckoo_hash_lookup0(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key,
++ cuckoo_hash_value *value)
++{
++ cuckoo_hash hash = cuckoo_compute_hash(hashtab, key, &hashtab->a0);
++
++ if ((hashtab->table0[hash].state == CUCKOO_HASH_STATE_OCCUPIED)
++ && cuckoo_hash_key_compare(hashtab, &(hashtab->table0[hash].key),
++ key)) {
++ *value = hashtab->table0[hash].value;
++ return 1;
++ }
++
++ return 0;
++}
++
++static int cuckoo_hash_lookup1(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key,
++ cuckoo_hash_value *value)
++{
++ cuckoo_hash hash = cuckoo_compute_hash(hashtab, key, &hashtab->a1);
++
++ if ((hashtab->table1[hash].state == CUCKOO_HASH_STATE_OCCUPIED)
++ && cuckoo_hash_key_compare(hashtab, &(hashtab->table1[hash].key),
++ key)) {
++ *value = hashtab->table1[hash].value;
++ return 1;
++ }
++
++ return 0;
++}
++
++
++int cuckoo_hash_lookup(cuckoo_hash_table *hashtab, cuckoo_hash_key *key,
++ cuckoo_hash_value *value)
++{
++ return cuckoo_hash_lookup0(hashtab, key, value)
++ || cuckoo_hash_lookup1(hashtab, key, value);
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_lookup);
++
++
++/* Transfer any active entries from "old_table" into hashtab */
++static int cuckoo_hash_transfer_entries(cuckoo_hash_table *hashtab,
++ cuckoo_hash_entry *old_table,
++ unsigned capacity)
++{
++ int i, rc;
++ cuckoo_hash_entry *entry;
++
++ hashtab->entries = 0;
++
++ for (i = 0; i < capacity; i++) {
++ entry = &old_table[i];
++ if (entry->state == CUCKOO_HASH_STATE_OCCUPIED) {
++ rc = cuckoo_hash_add(hashtab, &(entry->key),
++ entry->value, 0);
++ if (rc != 0) {
++ return rc;
++ }
++ }
++ }
++
++ return 0;
++}
++
++
++int cuckoo_hash_rehash(cuckoo_hash_table *hashtab)
++{
++ cuckoo_hash_entry *new_table;
++ cuckoo_hash_table old_hashtab;
++ int resize = 0, rc, rehash_count;
++
++ /*
++ * Store old tables so we can access the existing values and
++ * copy across
++ */
++ memcpy(&old_hashtab, hashtab, sizeof(cuckoo_hash_table));
++
++ /* resize if hashtable is more than half full */
++ if (old_hashtab.entries > old_hashtab.length &&
++ old_hashtab.length_bits < 32)
++ resize = 1;
++
++ resize:
++ if (resize) {
++ new_table = kmalloc(sizeof(cuckoo_hash_entry) * 4 * hashtab->length,
++ GFP_ATOMIC);
++ if (new_table == NULL) {
++ rc = -ENOMEM;
++ goto err;
++ }
++
++ hashtab->length = 2 * hashtab->length;
++ hashtab->length_bits++;
++ } else {
++ new_table = kmalloc(sizeof(cuckoo_hash_entry) * 2 * hashtab->length,
++ GFP_ATOMIC);
++ if (new_table == NULL) {
++ rc = -ENOMEM;
++ goto err;
++ }
++ }
++
++ /*
++ * Point hashtab to new memory region so we can try to
++ * construct new table
++ */
++ hashtab->table0 = new_table;
++ hashtab->table1 = (cuckoo_hash_entry *)
++ ((char *)new_table + hashtab->length * sizeof(cuckoo_hash_entry));
++
++ rehash_count = 0;
++
++ again:
++ /* Zero the new tables */
++ memset(new_table, 0, hashtab->length * 2 * sizeof(cuckoo_hash_entry));
++
++ /* Choose new parameters for the hash functions */
++ set_hash_parameters(hashtab);
++
++ /*
++ * Multiply old_table_length by 2 as the length refers to each
++ * table, and there are two of them. This assumes that they
++ * are arranged sequentially in memory, so assert it
++ */
++ BUG_ON(((char *)old_hashtab.table1) !=
++ ((char *)old_hashtab.table0 + old_hashtab.length
++ * sizeof(cuckoo_hash_entry)));
++ rc = cuckoo_hash_transfer_entries(hashtab, old_hashtab.table0,
++ old_hashtab.length * 2);
++ if (rc < 0) {
++ /* Problem */
++ if (rc == -ENOSPC) {
++ ++rehash_count;
++ if (rehash_count < CUCKOO_HASH_MAX_LOOP) {
++ /*
++ * Wanted to rehash, but rather than
++ * recurse we can just do it here
++ */
++ goto again;
++ } else {
++ /*
++ * Didn't manage to rehash, so let's
++ * go up a size (if we haven't already
++ * and there's space)
++ */
++ if (!resize && hashtab->length_bits < 32) {
++ resize = 1;
++ kfree(new_table);
++ goto resize;
++ }
++ else
++ goto err;
++ }
++ }
++ else
++ goto err;
++ }
++
++ /* Success, I think. Free up the old table */
++ kfree(old_hashtab.table0);
++
++ /* We should have put all the entries from old table in the new one */
++ BUG_ON(hashtab->entries != old_hashtab.entries);
++
++ return 0;
++ err:
++ EPRINTK("%s: Rehash failed, giving up\n", __FUNCTION__);
++ /* Some other error, give up, at least restore table to how it was */
++ memcpy(hashtab, &old_hashtab, sizeof(cuckoo_hash_table));
++ if (new_table)
++ kfree(new_table);
++ return rc;
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_rehash);
++
++
++static int
++cuckoo_hash_insert_or_displace(cuckoo_hash_entry *table, unsigned hash,
++ cuckoo_hash_key *key,
++ cuckoo_hash_value value,
++ cuckoo_hash_key *displaced_key,
++ cuckoo_hash_value *displaced_value)
++{
++ if (table[hash].state == CUCKOO_HASH_STATE_VACANT) {
++ cuckoo_hash_key_set(&(table[hash].key), key);
++ table[hash].value = value;
++ table[hash].state = CUCKOO_HASH_STATE_OCCUPIED;
++
++ return 1;
++ } else {
++ cuckoo_hash_key_set(displaced_key, &(table[hash].key));
++ *displaced_value = table[hash].value;
++ cuckoo_hash_key_set(&(table[hash].key), key);
++ table[hash].value = value;
++
++ return 0;
++ }
++}
++
++
++int cuckoo_hash_add(cuckoo_hash_table *hashtab, cuckoo_hash_key *key,
++ cuckoo_hash_value value, int can_rehash)
++{
++ cuckoo_hash hash0, hash1;
++ int i, rc;
++ cuckoo_hash_key key1, key2;
++
++ cuckoo_hash_key_set(&key1, key);
++
++ again:
++ i = 0;
++ do {
++ hash0 = cuckoo_compute_hash(hashtab, &key1, &hashtab->a0);
++ if (cuckoo_hash_insert_or_displace(hashtab->table0, hash0,
++ &key1, value, &key2,
++ &value)) {
++ /* Success */
++ hashtab->entries++;
++ return 0;
++ }
++
++ hash1 = cuckoo_compute_hash(hashtab, &key2, &hashtab->a1);
++ if (cuckoo_hash_insert_or_displace(hashtab->table1, hash1,
++ &key2, value, &key1,
++ &value)) {
++ /* Success */
++ hashtab->entries++;
++ return 0;
++ }
++ } while (++i < CUCKOO_HASH_MAX_LOOP);
++
++ if (can_rehash) {
++ if ((rc = cuckoo_hash_rehash(hashtab)) < 0) {
++ /*
++ * Give up - this will drop whichever
++ * key/value pair we have currently displaced
++ * on the floor
++ */
++ return rc;
++ }
++ goto again;
++ }
++
++ EPRINTK("%s: failed hash add\n", __FUNCTION__);
++ /*
++ * Couldn't do it - bad as we've now removed some random thing
++ * from the table, and will just drop it on the floor. Better
++ * would be to somehow revert the table to the state it was in
++ * at the start
++ */
++ return -ENOSPC;
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_add);
++
++
++int cuckoo_hash_add_check(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key, cuckoo_hash_value value,
++ int can_rehash)
++{
++ int stored_value;
++
++ if (cuckoo_hash_lookup(hashtab, key, &stored_value))
++ return -EBUSY;
++
++ return cuckoo_hash_add(hashtab, key, value, can_rehash);
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_add_check);
++
++
++int cuckoo_hash_remove(cuckoo_hash_table *hashtab, cuckoo_hash_key *key)
++{
++ cuckoo_hash hash;
++
++ hash = cuckoo_compute_hash(hashtab, key, &hashtab->a0);
++ if ((hashtab->table0[hash].state == CUCKOO_HASH_STATE_OCCUPIED) &&
++ cuckoo_hash_key_compare(hashtab, &(hashtab->table0[hash].key),
++ key)) {
++ hashtab->table0[hash].state = CUCKOO_HASH_STATE_VACANT;
++ hashtab->entries--;
++ return 0;
++ }
++
++ hash = cuckoo_compute_hash(hashtab, key, &hashtab->a1);
++ if ((hashtab->table1[hash].state == CUCKOO_HASH_STATE_OCCUPIED) &&
++ cuckoo_hash_key_compare(hashtab, &(hashtab->table1[hash].key),
++ key)) {
++ hashtab->table1[hash].state = CUCKOO_HASH_STATE_VACANT;
++ hashtab->entries--;
++ return 0;
++ }
++
++ return -EINVAL;
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_remove);
++
++
++int cuckoo_hash_update(cuckoo_hash_table *hashtab, cuckoo_hash_key *key,
++ cuckoo_hash_value value)
++{
++ cuckoo_hash hash;
++
++ hash = cuckoo_compute_hash(hashtab, key, &hashtab->a0);
++ if ((hashtab->table0[hash].state == CUCKOO_HASH_STATE_OCCUPIED) &&
++ cuckoo_hash_key_compare(hashtab, &(hashtab->table0[hash].key),
++ key)) {
++ hashtab->table0[hash].value = value;
++ return 0;
++ }
++
++ hash = cuckoo_compute_hash(hashtab, key, &hashtab->a1);
++ if ((hashtab->table1[hash].state == CUCKOO_HASH_STATE_OCCUPIED) &&
++ cuckoo_hash_key_compare(hashtab, &(hashtab->table1[hash].key),
++ key)) {
++ hashtab->table1[hash].value = value;
++ return 0;
++ }
++
++ return -EINVAL;
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_update);
++
++
++void cuckoo_hash_iterate_reset(cuckoo_hash_table *hashtab)
++{
++ hashtab->iterate_index = 0;
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_iterate_reset);
++
++
++int cuckoo_hash_iterate(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key, cuckoo_hash_value *value)
++{
++ unsigned index;
++
++ while (hashtab->iterate_index < hashtab->length) {
++ index = hashtab->iterate_index;
++ ++hashtab->iterate_index;
++ if (hashtab->table0[index].state == CUCKOO_HASH_STATE_OCCUPIED) {
++ *key = hashtab->table0[index].key;
++ *value = hashtab->table0[index].value;
++ return 0;
++ }
++ }
++
++ while (hashtab->iterate_index >= hashtab->length &&
++ hashtab->iterate_index < hashtab->length * 2) {
++ index = hashtab->iterate_index - hashtab->length;
++ ++hashtab->iterate_index;
++ if (hashtab->table1[index].state == CUCKOO_HASH_STATE_OCCUPIED) {
++ *key = hashtab->table1[index].key;
++ *value = hashtab->table1[index].value;
++ return 0;
++ }
++ }
++
++ return -ENOSPC;
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_iterate);
++
++
++#if 0
++void cuckoo_hash_valid(cuckoo_hash_table *hashtab)
++{
++ int i, entry_count = 0;
++
++ for (i=0; i < hashtab->length; i++) {
++ EPRINTK_ON(hashtab->table0[i].state != CUCKOO_HASH_STATE_VACANT &&
++ hashtab->table0[i].state != CUCKOO_HASH_STATE_OCCUPIED);
++ if (hashtab->table0[i].state == CUCKOO_HASH_STATE_OCCUPIED)
++ entry_count++;
++ EPRINTK_ON(hashtab->table1[i].state != CUCKOO_HASH_STATE_VACANT &&
++ hashtab->table1[i].state != CUCKOO_HASH_STATE_OCCUPIED);
++ if (hashtab->table1[i].state == CUCKOO_HASH_STATE_OCCUPIED)
++ entry_count++;
++ }
++
++ if (entry_count != hashtab->entries) {
++ EPRINTK("%s: bad count\n", __FUNCTION__);
++ cuckoo_hash_dump(hashtab);
++ return;
++ }
++
++ for (i=0; i< hashtab->length; i++) {
++ if (hashtab->table0[i].state == CUCKOO_HASH_STATE_OCCUPIED)
++ if (i != cuckoo_compute_hash(hashtab,
++ &hashtab->table0[i].key,
++ &hashtab->a0)) {
++ EPRINTK("%s: Bad key table 0 index %d\n",
++ __FUNCTION__, i);
++ cuckoo_hash_dump(hashtab);
++ return;
++ }
++ if (hashtab->table1[i].state == CUCKOO_HASH_STATE_OCCUPIED)
++ if (i != cuckoo_compute_hash(hashtab,
++ &hashtab->table1[i].key,
++ &hashtab->a1)) {
++ EPRINTK("%s: Bad key table 1 index %d\n",
++ __FUNCTION__, i);
++ cuckoo_hash_dump(hashtab);
++ return;
++ }
++ }
++
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_valid);
++
++
++void cuckoo_hash_dump(cuckoo_hash_table *hashtab)
++{
++ int i, entry_count;
++
++ entry_count = 0;
++ for (i=0; i < hashtab->length; i++) {
++ EPRINTK_ON(hashtab->table0[i].state != CUCKOO_HASH_STATE_VACANT &&
++ hashtab->table0[i].state != CUCKOO_HASH_STATE_OCCUPIED);
++ if (hashtab->table0[i].state == CUCKOO_HASH_STATE_OCCUPIED)
++ entry_count++;
++ EPRINTK_ON(hashtab->table1[i].state != CUCKOO_HASH_STATE_VACANT &&
++ hashtab->table1[i].state != CUCKOO_HASH_STATE_OCCUPIED);
++ if (hashtab->table1[i].state == CUCKOO_HASH_STATE_OCCUPIED)
++ entry_count++;
++ }
++
++ EPRINTK("======================\n");
++ EPRINTK("Cuckoo hash table dump\n");
++ EPRINTK("======================\n");
++ EPRINTK("length: %d; length_bits: %d; key_length: %d\n", hashtab->length,
++ hashtab->length_bits, hashtab->key_length);
++ EPRINTK("Recorded entries: %d\n", hashtab->entries);
++ EPRINTK("Counted entries: %d\n", entry_count);
++ EPRINTK("a0: %llx; a1: %llx\n", hashtab->a0, hashtab->a1);
++ EPRINTK("-----------------------------------------\n");
++ EPRINTK("Index Occupied Key Value Index0 Index1\n");
++ EPRINTK("-----------------------------------------\n");
++ for (i=0; i< hashtab->length; i++) {
++ if (hashtab->table0[i].state == CUCKOO_HASH_STATE_OCCUPIED)
++ EPRINTK("%d %d %llx %d %d %d\n", i,
++ hashtab->table0[i].state == CUCKOO_HASH_STATE_OCCUPIED,
++ hashtab->table0[i].key, hashtab->table0[i].value,
++ cuckoo_compute_hash(hashtab, &hashtab->table0[i].key,
++ &hashtab->a0),
++ cuckoo_compute_hash(hashtab, &hashtab->table0[i].key,
++ &hashtab->a1));
++ else
++ EPRINTK("%d %d - - - -\n", i,
++ hashtab->table0[i].state == CUCKOO_HASH_STATE_OCCUPIED);
++
++ }
++ EPRINTK("-----------------------------------------\n");
++ EPRINTK("Index Occupied Key Value Index0 Index1\n");
++ EPRINTK("-----------------------------------------\n");
++ for (i=0; i< hashtab->length; i++) {
++ if (hashtab->table1[i].state == CUCKOO_HASH_STATE_OCCUPIED)
++ EPRINTK("%d %d %llx %d %d %d\n", i,
++ hashtab->table1[i].state == CUCKOO_HASH_STATE_OCCUPIED,
++ hashtab->table1[i].key, hashtab->table1[i].value,
++ cuckoo_compute_hash(hashtab, &hashtab->table1[i].key,
++ &hashtab->a0),
++ cuckoo_compute_hash(hashtab, &hashtab->table1[i].key,
++ &hashtab->a1));
++ else
++ EPRINTK("%d %d - - - -\n", i,
++ hashtab->table1[i].state == CUCKOO_HASH_STATE_OCCUPIED);
++ }
++ EPRINTK("======================\n");
++}
++EXPORT_SYMBOL_GPL(cuckoo_hash_dump);
++#endif
+Index: head-2008-11-25/drivers/xen/sfc_netutil/accel_cuckoo_hash.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netutil/accel_cuckoo_hash.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,227 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++/*
++ * A cuckoo hash table consists of two sub tables. Each entry can
++ * hash to a position in each table. If, on entry, its position is
++ * found to be occupied, the existing element is moved to it's other
++ * location. This recurses until success or a loop is found. If a
++ * loop is found the table is rehashed.
++ *
++ * See http://www.it-c.dk/people/pagh/papers/cuckoo-jour.pdf
++ */
++
++#ifndef NET_ACCEL_CUCKOO_HASH_H
++#define NET_ACCEL_CUCKOO_HASH_H
++
++/*! Type used for hash table keys of ip pairs */
++typedef struct {
++ u32 local_ip;
++ //u32 remote_ip;
++ u16 local_port;
++ //u16 remote_port;
++ /* Technically only 1 bit, but use 16 to make key a round
++ number size */
++ u16 proto;
++} cuckoo_hash_ip_key;
++
++/*! Type used for hash table keys of mac addresses */
++typedef u64 cuckoo_hash_mac_key;
++
++/*! This type is designed to be large enough to hold all supported key
++ * sizes to avoid having to malloc storage for them.
++ */
++typedef u64 cuckoo_hash_key;
++
++/*! Type used for the values stored in the hash table */
++typedef int cuckoo_hash_value;
++
++/*! Type used for the hash used to index the table */
++typedef u32 cuckoo_hash;
++
++/*! How long to spend displacing values when adding before giving up
++ * and rehashing */
++#define CUCKOO_HASH_MAX_LOOP (hashtab->length)
++
++/*! State of hash table entry */
++typedef enum {
++ CUCKOO_HASH_STATE_VACANT = 0,
++ CUCKOO_HASH_STATE_OCCUPIED
++} cuckoo_hash_state;
++
++/*! An entry in the hash table */
++typedef struct {
++ cuckoo_hash_state state;
++ cuckoo_hash_key key;
++ cuckoo_hash_value value;
++} cuckoo_hash_entry;
++
++/*! A cuckoo hash table */
++typedef struct {
++ /*! The length of each table (NB. there are two tables of this
++ * length) */
++ unsigned length;
++ /*! The length of each table in bits */
++ unsigned length_bits;
++ /*! The length of the key in bytes */
++ unsigned key_length;
++ /*! The number of entries currently stored in the table */
++ unsigned entries;
++ /*! Index into table used by cuckoo_hash_iterate */
++ unsigned iterate_index;
++
++ /* parameter of hash functions */
++ /*! The "a" parameter of the first hash function */
++ cuckoo_hash_key a0;
++ /*! The "a" parameter of the second hash function */
++ cuckoo_hash_key a1;
++
++ /*! The first table */
++ cuckoo_hash_entry *table0;
++ /*! The second table */
++ cuckoo_hash_entry *table1;
++} cuckoo_hash_table;
++
++/*! Initialise the cuckoo has table
++ *
++ * \param hashtab A pointer to an unitialised hash table structure
++ * \param length_bits The number of elements in each table equals
++ * 2**length_bits
++ * \param key_length The length of the key in bytes
++ *
++ * \return 0 on success, -ENOMEM if it couldn't allocate the tables
++ */
++extern
++int cuckoo_hash_init(cuckoo_hash_table *hashtab, unsigned length_bits,
++ unsigned key_length);
++
++
++/*! Destroy a hash table
++ *
++ * \param hashtab A hash table that has previously been passed to a
++ * successful call of cuckoo_hash_init()
++ */
++extern
++void cuckoo_hash_destroy(cuckoo_hash_table *hashtab);
++
++
++/*! Lookup an entry in the hash table
++ *
++ * \param hashtab The hash table in which to look.
++ * \param key Pointer to a mac address to use as the key
++ * \param value On exit set to the value stored if key was present
++ *
++ * \return 0 if not present in the table, non-zero if it is (and value
++ * is set accordingly)
++ */
++extern
++int cuckoo_hash_lookup(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key,
++ cuckoo_hash_value *value);
++
++/*! Add an entry to the hash table. Key must not be a duplicate of
++ * anything already in the table. If this is a risk, see
++ * cuckoo_hash_add_check
++ *
++ * \param hashtab The hash table to add the entry to
++ * \param key Pointer to a mac address to use as a key
++ * \param value The value to store
++ * \param can_rehash Flag to allow the add function to rehash the
++ * table if necessary
++ *
++ * \return 0 on success, non-zero on failure. -ENOSPC means it just
++ * couldn't find anywhere to put it - this is bad and probably means
++ * an entry has been dropped on the floor (but the entry you just
++ * tried to add may now be included)
++ */
++extern
++int cuckoo_hash_add(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key,
++ cuckoo_hash_value value,
++ int can_rehash);
++
++/*! Same as cuckoo_hash_add but first checks to ensure entry is not
++ * already there
++ * \return -EBUSY if already there
++ */
++
++extern
++int cuckoo_hash_add_check(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key,
++ cuckoo_hash_value value,
++ int can_rehash);
++/*! Remove an entry from the table
++ *
++ * \param hashtab The hash table to remove the entry from
++ * \param key The key that was used to previously add the entry
++ *
++ * \return 0 on success, -EINVAL if the entry couldn't be found
++ */
++extern
++int cuckoo_hash_remove(cuckoo_hash_table *hashtab, cuckoo_hash_key *key);
++
++
++/*! Helper for those using mac addresses to convert to a key for the
++ * hash table
++ */
++static inline cuckoo_hash_mac_key cuckoo_mac_to_key(const u8 *mac)
++{
++ return (cuckoo_hash_mac_key)(mac[0])
++ | (cuckoo_hash_mac_key)(mac[1]) << 8
++ | (cuckoo_hash_mac_key)(mac[2]) << 16
++ | (cuckoo_hash_mac_key)(mac[3]) << 24
++ | (cuckoo_hash_mac_key)(mac[4]) << 32
++ | (cuckoo_hash_mac_key)(mac[5]) << 40;
++}
++
++
++/*! Update an entry already in the hash table to take a new value
++ *
++ * \param hashtab The hash table to add the entry to
++ * \param key Pointer to a mac address to use as a key
++ * \param value The value to store
++ *
++ * \return 0 on success, non-zero on failure.
++ */
++int cuckoo_hash_update(cuckoo_hash_table *hashtab, cuckoo_hash_key *key,
++ cuckoo_hash_value value);
++
++
++/*! Go through the hash table and return all used entries (one per call)
++ *
++ * \param hashtab The hash table to iterate over
++ * \param key Pointer to a key to take the returned key
++ * \param value Pointer to a value to take the returned value
++ *
++ * \return 0 on success (key, value set), non-zero on failure.
++ */
++int cuckoo_hash_iterate(cuckoo_hash_table *hashtab,
++ cuckoo_hash_key *key, cuckoo_hash_value *value);
++void cuckoo_hash_iterate_reset(cuckoo_hash_table *hashtab);
++
++/* debug, not compiled by default */
++void cuckoo_hash_valid(cuckoo_hash_table *hashtab);
++void cuckoo_hash_dump(cuckoo_hash_table *hashtab);
++
++#endif /* NET_ACCEL_CUCKOO_HASH_H */
+Index: head-2008-11-25/drivers/xen/sfc_netutil/accel_msg_iface.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netutil/accel_msg_iface.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,301 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <xen/evtchn.h>
++
++#include "accel_util.h"
++#include "accel_msg_iface.h"
++
++#define NET_ACCEL_MSG_Q_SIZE (1024)
++#define NET_ACCEL_MSG_Q_MASK (NET_ACCEL_MSG_Q_SIZE - 1)
++
++#ifdef NDEBUG
++#define NET_ACCEL_CHECK_MAGIC(_p, _errval)
++#define NET_ACCEL_SHOW_QUEUE(_t, _q, _id)
++#else
++#define NET_ACCEL_CHECK_MAGIC(_p, _errval) \
++ if (_p->magic != NET_ACCEL_MSG_MAGIC) { \
++ printk(KERN_ERR "%s: passed invalid shared page %p!\n", \
++ __FUNCTION__, _p); \
++ return _errval; \
++ }
++#define NET_ACCEL_SHOW_QUEUE(_t, _q, _id) \
++ printk(_t ": queue %d write %x read %x base %x limit %x\n", \
++ _id, _q->write, _q->read, _q->base, _q->limit);
++#endif
++
++/*
++ * We've been passed at least 2 pages. 1 control page and 1 or more
++ * data pages.
++ */
++int net_accel_msg_init_page(void *mem, int len, int up)
++{
++ struct net_accel_shared_page *shared_page =
++ (struct net_accel_shared_page*)mem;
++
++ if ((unsigned long)shared_page & NET_ACCEL_MSG_Q_MASK)
++ return -EINVAL;
++
++ shared_page->magic = NET_ACCEL_MSG_MAGIC;
++
++ shared_page->aflags = 0;
++
++ shared_page->net_dev_up = up;
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_init_page);
++
++
++void net_accel_msg_init_queue(sh_msg_fifo2 *queue,
++ struct net_accel_msg_queue *indices,
++ struct net_accel_msg *base, int size)
++{
++ queue->fifo = base;
++ spin_lock_init(&queue->lock);
++ sh_fifo2_init(queue, size-1, &indices->read, &indices->write);
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_init_queue);
++
++
++static inline int _net_accel_msg_send(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ struct net_accel_msg *msg,
++ int is_reply)
++{
++ int rc = 0;
++ NET_ACCEL_CHECK_MAGIC(sp, -EINVAL);
++ rmb();
++ if (is_reply) {
++ EPRINTK_ON(sh_fifo2_is_full(queue));
++ sh_fifo2_put(queue, *msg);
++ } else {
++ if (sh_fifo2_not_half_full(queue)) {
++ sh_fifo2_put(queue, *msg);
++ } else {
++ rc = -ENOSPC;
++ }
++ }
++ wmb();
++ return rc;
++}
++
++/* Notify after a batch of messages have been sent */
++void net_accel_msg_notify(int irq)
++{
++ notify_remote_via_irq(irq);
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_notify);
++
++/*
++ * Send a message on the specified FIFO. Returns 0 on success, -errno
++ * on failure. The message in msg is copied to the current slot of the
++ * FIFO.
++ */
++int net_accel_msg_send(struct net_accel_shared_page *sp, sh_msg_fifo2 *q,
++ struct net_accel_msg *msg)
++{
++ unsigned long flags;
++ int rc;
++ net_accel_msg_lock_queue(q, &flags);
++ rc = _net_accel_msg_send(sp, q, msg, 0);
++ net_accel_msg_unlock_queue(q, &flags);
++ return rc;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_send);
++
++
++/* As net_accel_msg_send but also posts a notification to the far end. */
++int net_accel_msg_send_notify(struct net_accel_shared_page *sp, int irq,
++ sh_msg_fifo2 *q, struct net_accel_msg *msg)
++{
++ unsigned long flags;
++ int rc;
++ net_accel_msg_lock_queue(q, &flags);
++ rc = _net_accel_msg_send(sp, q, msg, 0);
++ net_accel_msg_unlock_queue(q, &flags);
++ if (rc >= 0)
++ notify_remote_via_irq(irq);
++ return rc;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_send_notify);
++
++
++int net_accel_msg_reply(struct net_accel_shared_page *sp, sh_msg_fifo2 *q,
++ struct net_accel_msg *msg)
++{
++ unsigned long flags;
++ int rc;
++ net_accel_msg_lock_queue(q, &flags);
++ rc = _net_accel_msg_send(sp, q, msg, 1);
++ net_accel_msg_unlock_queue(q, &flags);
++ return rc;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_reply);
++
++
++/* As net_accel_msg_send but also posts a notification to the far end. */
++int net_accel_msg_reply_notify(struct net_accel_shared_page *sp, int irq,
++ sh_msg_fifo2 *q, struct net_accel_msg *msg)
++{
++ unsigned long flags;
++ int rc;
++ net_accel_msg_lock_queue(q, &flags);
++ rc = _net_accel_msg_send(sp, q, msg, 1);
++ net_accel_msg_unlock_queue(q, &flags);
++ if (rc >= 0)
++ notify_remote_via_irq(irq);
++ return rc;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_reply_notify);
++
++
++/*
++ * Look at a received message, if any, so a decision can be made about
++ * whether to read it now or not. Cookie is a bit of debug which is
++ * set here and checked when passed to net_accel_msg_recv_next()
++ */
++int net_accel_msg_peek(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ struct net_accel_msg *msg, int *cookie)
++{
++ unsigned long flags;
++ int rc = 0;
++ NET_ACCEL_CHECK_MAGIC(sp, -EINVAL);
++ net_accel_msg_lock_queue(queue, &flags);
++ rmb();
++ if (sh_fifo2_is_empty(queue)) {
++ rc = -ENOENT;
++ } else {
++ *msg = sh_fifo2_peek(queue);
++ *cookie = *(queue->fifo_rd_i);
++ }
++ net_accel_msg_unlock_queue(queue, &flags);
++ return rc;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_peek);
++
++
++/*
++ * Move the queue onto the next element, used after finished with a
++ * peeked msg
++ */
++int net_accel_msg_recv_next(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue, int cookie)
++{
++ unsigned long flags;
++ NET_ACCEL_CHECK_MAGIC(sp, -EINVAL);
++ net_accel_msg_lock_queue(queue, &flags);
++ rmb();
++ /* Mustn't be empty */
++ BUG_ON(sh_fifo2_is_empty(queue));
++ /*
++ * Check cookie matches, i.e. we're advancing over the same message
++ * as was got using peek
++ */
++ BUG_ON(cookie != *(queue->fifo_rd_i));
++ sh_fifo2_rd_next(queue);
++ wmb();
++ net_accel_msg_unlock_queue(queue, &flags);
++ return 0;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_recv_next);
++
++
++/*
++ * Receive a message on the specified FIFO. Returns 0 on success,
++ * -errno on failure.
++ */
++int net_accel_msg_recv(struct net_accel_shared_page *sp, sh_msg_fifo2 *queue,
++ struct net_accel_msg *msg)
++{
++ unsigned long flags;
++ int rc = 0;
++ NET_ACCEL_CHECK_MAGIC(sp, -EINVAL);
++ net_accel_msg_lock_queue(queue, &flags);
++ rmb();
++ if (sh_fifo2_is_empty(queue)) {
++ rc = -ENOENT;
++ } else {
++ sh_fifo2_get(queue, msg);
++ }
++ wmb();
++ net_accel_msg_unlock_queue(queue, &flags);
++ return rc;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_recv);
++
++
++/*
++ * Start sending a message without copying. returns a pointer to a message
++ * that will be filled out in place. The queue is locked until the message
++ * is sent.
++ */
++struct net_accel_msg *net_accel_msg_start_send(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue, unsigned long *flags)
++{
++ struct net_accel_msg *msg;
++ NET_ACCEL_CHECK_MAGIC(sp, NULL);
++ net_accel_msg_lock_queue(queue, flags);
++ rmb();
++ if (sh_fifo2_not_half_full(queue)) {
++ msg = sh_fifo2_pokep(queue);
++ } else {
++ net_accel_msg_unlock_queue(queue, flags);
++ msg = NULL;
++ }
++ return msg;
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_start_send);
++
++
++static inline void _msg_complete(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ unsigned long *flags)
++{
++ sh_fifo2_wr_next(queue);
++ net_accel_msg_unlock_queue(queue, flags);
++}
++
++/*
++ * Complete the sending of a message started with net_accel_msg_start_send. The
++ * message is implicit since the queue was locked by _start
++ */
++void net_accel_msg_complete_send(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ unsigned long *flags)
++{
++ _msg_complete(sp, queue, flags);
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_complete_send);
++
++/* As net_accel_msg_complete_send but does the notify. */
++void net_accel_msg_complete_send_notify(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ unsigned long *flags, int irq)
++{
++ _msg_complete(sp, queue, flags);
++ notify_remote_via_irq(irq);
++}
++EXPORT_SYMBOL_GPL(net_accel_msg_complete_send_notify);
+Index: head-2008-11-25/drivers/xen/sfc_netutil/accel_msg_iface.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netutil/accel_msg_iface.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,414 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NET_ACCEL_MSG_IFACE_H
++#define NET_ACCEL_MSG_IFACE_H
++
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <linux/udp.h>
++#include <linux/in.h>
++#include <linux/netdevice.h>
++#include <linux/etherdevice.h>
++
++#include "accel_shared_fifo.h"
++
++#define NET_ACCEL_MSG_MAGIC (0x85465479)
++
++/*! We talk version 0.010 of the interdomain protocol */
++#define NET_ACCEL_MSG_VERSION (0x00001000)
++
++/*! Shared memory portion of inter-domain FIFO */
++struct net_accel_msg_queue {
++ u32 read;
++ u32 write;
++};
++
++
++/*
++ * The aflags in the following structure is used as follows:
++ *
++ * - each bit is set when one of the corresponding variables is
++ * changed by either end.
++ *
++ * - the end that has made the change then forwards an IRQ to the
++ * other
++ *
++ * - the IRQ handler deals with these bits either on the fast path, or
++ * for less common changes, by jumping onto the slow path.
++ *
++ * - once it has seen a change, it clears the relevant bit.
++ *
++ * aflags is accessed atomically using clear_bit, test_bit,
++ * test_and_set_bit etc
++ */
++
++/*
++ * The following used to signify to the other domain when the queue
++ * they want to use is full, and when it is no longer full. Could be
++ * compressed to use fewer bits but done this way for simplicity and
++ * clarity
++ */
++
++/* "dom0->domU queue" is full */
++#define NET_ACCEL_MSG_AFLAGS_QUEUE0FULL 0x1
++#define NET_ACCEL_MSG_AFLAGS_QUEUE0FULL_B 0
++/* "dom0->domU queue" is not full */
++#define NET_ACCEL_MSG_AFLAGS_QUEUE0NOTFULL 0x2
++#define NET_ACCEL_MSG_AFLAGS_QUEUE0NOTFULL_B 1
++/* "domU->dom0 queue" is full */
++#define NET_ACCEL_MSG_AFLAGS_QUEUEUFULL 0x4
++#define NET_ACCEL_MSG_AFLAGS_QUEUEUFULL_B 2
++/* "domU->dom0 queue" is not full */
++#define NET_ACCEL_MSG_AFLAGS_QUEUEUNOTFULL 0x8
++#define NET_ACCEL_MSG_AFLAGS_QUEUEUNOTFULL_B 3
++/* dom0 -> domU net_dev up/down events */
++#define NET_ACCEL_MSG_AFLAGS_NETUPDOWN 0x10
++#define NET_ACCEL_MSG_AFLAGS_NETUPDOWN_B 4
++
++/*
++ * Masks used to test if there are any messages for domU and dom0
++ * respectively
++ */
++#define NET_ACCEL_MSG_AFLAGS_TO_DOMU_MASK \
++ (NET_ACCEL_MSG_AFLAGS_QUEUE0FULL | \
++ NET_ACCEL_MSG_AFLAGS_QUEUEUNOTFULL | \
++ NET_ACCEL_MSG_AFLAGS_NETUPDOWN)
++#define NET_ACCEL_MSG_AFLAGS_TO_DOM0_MASK \
++ (NET_ACCEL_MSG_AFLAGS_QUEUE0NOTFULL | \
++ NET_ACCEL_MSG_AFLAGS_QUEUEUFULL)
++
++/*! The shared data structure used for inter-VM communication. */
++struct net_accel_shared_page {
++ /*! Sanity check */
++ u32 magic;
++ /*! Used by host/Dom0 */
++ struct net_accel_msg_queue queue0;
++ /*! Used by guest/DomU */
++ struct net_accel_msg_queue queue1;
++ /*! Atomic flags, used to communicate simple state changes */
++ u32 aflags;
++ /*! State of net_dev used for acceleration */
++ u32 net_dev_up;
++};
++
++
++enum net_accel_hw_type {
++ /*! Not a virtualisable NIC: use slow path. */
++ NET_ACCEL_MSG_HWTYPE_NONE = 0,
++ /*! NIC is Falcon-based */
++ NET_ACCEL_MSG_HWTYPE_FALCON_A = 1,
++ NET_ACCEL_MSG_HWTYPE_FALCON_B = 2,
++};
++
++/*! The maximum number of pages used by an event queue. */
++#define EF_HW_FALCON_EVQ_PAGES 8
++
++struct net_accel_hw_falcon_b {
++ /* VI */
++ /*! Grant for Tx DMA Q */
++ u32 txdmaq_gnt;
++ /*! Grant for Rx DMA Q */
++ u32 rxdmaq_gnt;
++ /*! Machine frame number for Tx/Rx doorbell page */
++ u32 doorbell_mfn;
++ /*! Grant for Tx/Rx doorbell page */
++ u32 doorbell_gnt;
++
++ /* Event Q */
++ /*! Grants for the pages of the EVQ */
++ u32 evq_mem_gnts[EF_HW_FALCON_EVQ_PAGES];
++ u32 evq_offs;
++ /*! log2(pages in event Q) */
++ u32 evq_order;
++ /*! Capacity in events */
++ u32 evq_capacity;
++ /*! Eventq pointer register physical address */
++ u32 evq_rptr;
++ /*! Interface instance */
++ u32 instance;
++ /*! Capacity of RX queue */
++ u32 rx_capacity;
++ /*! Capacity of TX queue */
++ u32 tx_capacity;
++
++ /* NIC */
++ s32 nic_arch;
++ s32 nic_revision;
++ u8 nic_variant;
++};
++
++struct net_accel_hw_falcon_a {
++ struct net_accel_hw_falcon_b common;
++ u32 evq_rptr_gnt;
++};
++
++
++/*! Description of the hardware that the DomU is being given. */
++struct net_accel_msg_hw {
++ u32 type; /*!< Hardware type */
++ union {
++ struct net_accel_hw_falcon_a falcon_a;
++ struct net_accel_hw_falcon_b falcon_b;
++ } resources;
++};
++
++/*! Start-of-day handshake message. Dom0 fills in its version and
++ * sends, DomU checks, inserts its version and replies
++ */
++struct net_accel_msg_hello {
++ /*! Sender's version (set by each side in turn) */
++ u32 version;
++ /*! max pages allocated/allowed for buffers */
++ u32 max_pages;
++};
++
++/*! Maximum number of page requests that can fit in a message. */
++#define NET_ACCEL_MSG_MAX_PAGE_REQ (8)
++
++/*! Request for NIC buffers. DomU fils out pages and grants (and
++ * optionally) reqid, dom0 fills out buf and sends reply
++ */
++struct net_accel_msg_map_buffers {
++ u32 reqid; /*!< Optional request ID */
++ u32 pages; /*!< Number of pages to map */
++ u32 grants[NET_ACCEL_MSG_MAX_PAGE_REQ]; /*!< Grant ids to map */
++ u32 buf; /*!< NIC buffer address of pages obtained */
++};
++
++/*! Notification of a change to local mac address, used to filter
++ locally destined packets off the fast path */
++struct net_accel_msg_localmac {
++ u32 flags; /*!< Should this be added or removed? */
++ u8 mac[ETH_ALEN]; /*!< The mac address to filter onto slow path */
++};
++
++struct net_accel_msg_fastpath {
++ u32 flags; /*!< Should this be added or removed? */
++ u8 mac[ETH_ALEN];/*!< The mac address to filter onto fast path */
++ u16 port; /*!< The port of the connection */
++ u32 ip; /*!< The IP address of the connection */
++ u8 proto; /*!< The protocol of connection (TCP/UDP) */
++};
++
++/*! Values for struct ef_msg_localmac/fastpath.flags */
++#define NET_ACCEL_MSG_ADD 0x1
++#define NET_ACCEL_MSG_REMOVE 0x2
++
++/*! Overall message structure */
++struct net_accel_msg {
++ /*! ID specifying type of messge */
++ u32 id;
++ union {
++ /*! handshake */
++ struct net_accel_msg_hello hello;
++ /*! hardware description */
++ struct net_accel_msg_hw hw;
++ /*! buffer map request */
++ struct net_accel_msg_map_buffers mapbufs;
++ /*! mac address of a local interface */
++ struct net_accel_msg_localmac localmac;
++ /*! address of a new fastpath connection */
++ struct net_accel_msg_fastpath fastpath;
++ /*! make the message a fixed size */
++ u8 pad[128 - sizeof(u32)];
++ } u;
++};
++
++
++#define NET_ACCEL_MSG_HW_TO_MSG(_u) container_of(_u, struct net_accel_msg, u.hw)
++
++/*! Inter-domain message FIFO */
++typedef struct {
++ struct net_accel_msg *fifo;
++ u32 fifo_mask;
++ u32 *fifo_rd_i;
++ u32 *fifo_wr_i;
++ spinlock_t lock;
++ u32 is_locked; /* Debug flag */
++} sh_msg_fifo2;
++
++
++#define NET_ACCEL_MSG_OFFSET_MASK PAGE_MASK
++
++/* Modifiers */
++#define NET_ACCEL_MSG_REPLY (0x80000000)
++#define NET_ACCEL_MSG_ERROR (0x40000000)
++
++/* Dom0 -> DomU and reply. Handshake/version check. */
++#define NET_ACCEL_MSG_HELLO (0x00000001)
++/* Dom0 -> DomU : hardware setup (VI info.) */
++#define NET_ACCEL_MSG_SETHW (0x00000002)
++/*
++ * Dom0 -> DomU. Notification of a local mac to add/remove from slow
++ * path filter
++ */
++#define NET_ACCEL_MSG_LOCALMAC (0x00000003)
++/*
++ * DomU -> Dom0 and reply. Request for buffer table entries for
++ * preallocated pages.
++ */
++#define NET_ACCEL_MSG_MAPBUF (0x00000004)
++/*
++ * Dom0 -> DomU. Notification of a local mac to add/remove from fast
++ * path filter
++ */
++#define NET_ACCEL_MSG_FASTPATH (0x00000005)
++
++/*! Initialise a message and set the type
++ * \param message : the message
++ * \param code : the message type
++ */
++static inline void net_accel_msg_init(struct net_accel_msg *msg, int code) {
++ msg->id = (u32)code;
++}
++
++/*! initialise a shared page structure
++ * \param shared_page : mapped memory in which the structure resides
++ * \param len : size of the message FIFO area that follows
++ * \param up : initial up/down state of netdev
++ * \return 0 or an error code
++ */
++extern int net_accel_msg_init_page(void *shared_page, int len, int up);
++
++/*! initialise a message queue
++ * \param queue : the message FIFO to initialise
++ * \param indices : the read and write indices in shared memory
++ * \param base : the start of the memory area for the FIFO
++ * \param size : the size of the FIFO in bytes
++ */
++extern void net_accel_msg_init_queue(sh_msg_fifo2 *queue,
++ struct net_accel_msg_queue *indices,
++ struct net_accel_msg *base, int size);
++
++/* Notify after a batch of messages have been sent */
++extern void net_accel_msg_notify(int irq);
++
++/*! Send a message on the specified FIFO. The message is copied to the
++ * current slot of the FIFO.
++ * \param sp : pointer to shared page
++ * \param q : pointer to message FIFO to use
++ * \param msg : pointer to message
++ * \return 0 on success, -errno on
++ */
++extern int net_accel_msg_send(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *q,
++ struct net_accel_msg *msg);
++extern int net_accel_msg_reply(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *q,
++ struct net_accel_msg *msg);
++
++/*! As net_accel_msg_send but also posts a notification to the far end. */
++extern int net_accel_msg_send_notify(struct net_accel_shared_page *sp,
++ int irq, sh_msg_fifo2 *q,
++ struct net_accel_msg *msg);
++/*! As net_accel_msg_send but also posts a notification to the far end. */
++extern int net_accel_msg_reply_notify(struct net_accel_shared_page *sp,
++ int irq, sh_msg_fifo2 *q,
++ struct net_accel_msg *msg);
++
++/*! Receive a message on the specified FIFO. Returns 0 on success,
++ * -errno on failure.
++ */
++extern int net_accel_msg_recv(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *q,
++ struct net_accel_msg *msg);
++
++/*! Look at a received message, if any, so a decision can be made
++ * about whether to read it now or not. Cookie is a bit of debug
++ * which is set here and checked when passed to
++ * net_accel_msg_recv_next()
++ */
++extern int net_accel_msg_peek(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ struct net_accel_msg *msg, int *cookie);
++/*! Move the queue onto the next element, used after finished with a
++ * peeked msg
++ */
++extern int net_accel_msg_recv_next(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue, int cookie);
++
++/*! Start sending a message without copying. returns a pointer to a
++ * message that will be filled out in place. The queue is locked
++ * until the message is sent.
++ */
++extern
++struct net_accel_msg *net_accel_msg_start_send(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ unsigned long *flags);
++
++
++/*! Complete the sending of a message started with
++ * net_accel_msg_start_send. The message is implicit since the queue
++ * was locked by _start
++ */
++extern void net_accel_msg_complete_send(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ unsigned long *flags);
++
++/*! As net_accel_msg_complete_send but does the notify. */
++extern void net_accel_msg_complete_send_notify(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue,
++ unsigned long *flags, int irq);
++
++/*! Lock the queue so that multiple "_locked" functions can be called
++ * without the queue being modified by others
++ */
++static inline
++void net_accel_msg_lock_queue(sh_msg_fifo2 *queue, unsigned long *flags)
++{
++ spin_lock_irqsave(&queue->lock, (*flags));
++ rmb();
++ BUG_ON(queue->is_locked);
++ queue->is_locked = 1;
++}
++
++/*! Unlock the queue */
++static inline
++void net_accel_msg_unlock_queue(sh_msg_fifo2 *queue, unsigned long *flags)
++{
++ BUG_ON(!queue->is_locked);
++ queue->is_locked = 0;
++ wmb();
++ spin_unlock_irqrestore(&queue->lock, (*flags));
++}
++
++/*! Give up without sending a message that was started with
++ * net_accel_msg_start_send()
++ */
++static inline
++void net_accel_msg_abort_send(struct net_accel_shared_page *sp,
++ sh_msg_fifo2 *queue, unsigned long *flags)
++{
++ net_accel_msg_unlock_queue(queue, flags);
++}
++
++/*! Test the queue to ensure there is sufficient space */
++static inline
++int net_accel_msg_check_space(sh_msg_fifo2 *queue, unsigned space)
++{
++ return sh_fifo2_space(queue) >= space;
++}
++
++#endif /* NET_ACCEL_MSG_IFACE_H */
+Index: head-2008-11-25/drivers/xen/sfc_netutil/accel_shared_fifo.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netutil/accel_shared_fifo.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,127 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NET_ACCEL_SHARED_FIFO_H
++#define NET_ACCEL_SHARED_FIFO_H
++
++/*
++ * This is based on fifo.h, but handles sharing between address spaces
++ * that don't trust each other, by splitting out the read and write
++ * indices. This costs at least one pointer indirection more than the
++ * vanilla version per access.
++ */
++
++typedef struct {
++ char* fifo;
++ unsigned fifo_mask;
++ unsigned *fifo_rd_i;
++ unsigned *fifo_wr_i;
++} sh_byte_fifo2;
++
++#define SH_FIFO2_M(f, x) ((x) & ((f)->fifo_mask))
++
++static inline unsigned log2_ge(unsigned long n, unsigned min_order) {
++ unsigned order = min_order;
++ while((1ul << order) < n) ++order;
++ return order;
++}
++
++static inline unsigned long pow2(unsigned order) {
++ return (1ul << order);
++}
++
++#define is_pow2(x) (pow2(log2_ge((x), 0)) == (x))
++
++#define sh_fifo2_valid(f) ((f) && (f)->fifo && (f)->fifo_mask > 0 && \
++ is_pow2((f)->fifo_mask+1u))
++
++#define sh_fifo2_init(f, cap, _rptr, _wptr) \
++ do { \
++ BUG_ON(!is_pow2((cap) + 1)); \
++ (f)->fifo_rd_i = _rptr; \
++ (f)->fifo_wr_i = _wptr; \
++ *(f)->fifo_rd_i = *(f)->fifo_wr_i = 0u; \
++ (f)->fifo_mask = (cap); \
++ } while(0)
++
++#define sh_fifo2_num(f) SH_FIFO2_M((f),*(f)->fifo_wr_i - *(f)->fifo_rd_i)
++#define sh_fifo2_space(f) SH_FIFO2_M((f),*(f)->fifo_rd_i - *(f)->fifo_wr_i-1u)
++#define sh_fifo2_is_empty(f) (sh_fifo2_num(f)==0)
++#define sh_fifo2_not_empty(f) (sh_fifo2_num(f)!=0)
++#define sh_fifo2_is_full(f) (sh_fifo2_space(f)==0u)
++#define sh_fifo2_not_full(f) (sh_fifo2_space(f)!=0u)
++#define sh_fifo2_buf_size(f) ((f)->fifo_mask + 1u)
++#define sh_fifo2_capacity(f) ((f)->fifo_mask)
++#define sh_fifo2_end(f) ((f)->fifo + sh_fifo2_buf_size(f))
++#define sh_fifo2_not_half_full(f) (sh_fifo2_space(f) > (sh_fifo2_capacity(f) >> 1))
++
++#define sh_fifo2_peek(f) ((f)->fifo[SH_FIFO2_M((f), *(f)->fifo_rd_i)])
++#define sh_fifo2_peekp(f) ((f)->fifo + SH_FIFO2_M((f), *(f)->fifo_rd_i))
++#define sh_fifo2_poke(f) ((f)->fifo[SH_FIFO2_M((f), *(f)->fifo_wr_i)])
++#define sh_fifo2_pokep(f) ((f)->fifo + SH_FIFO2_M((f), *(f)->fifo_wr_i))
++#define sh_fifo2_peek_i(f,i) ((f)->fifo[SH_FIFO2_M((f), *(f)->fifo_rd_i+(i))])
++#define sh_fifo2_poke_i(f,i) ((f)->fifo[SH_FIFO2_M((f), *(f)->fifo_wr_i+(i))])
++
++#define sh_fifo2_rd_next(f) \
++ do {*(f)->fifo_rd_i = *(f)->fifo_rd_i + 1u;} while(0)
++#define sh_fifo2_wr_next(f) \
++ do {*(f)->fifo_wr_i = *(f)->fifo_wr_i + 1u;} while(0)
++#define sh_fifo2_rd_adv(f, n) \
++ do {*(f)->fifo_rd_i = *(f)->fifo_rd_i + (n);} while(0)
++#define sh_fifo2_wr_adv(f, n) \
++ do {*(f)->fifo_wr_i = *(f)->fifo_wr_i + (n);} while(0)
++
++#define sh_fifo2_put(f, v) \
++ do {sh_fifo2_poke(f) = (v); wmb(); sh_fifo2_wr_next(f);} while(0)
++
++#define sh_fifo2_get(f, pv) \
++ do {*(pv) = sh_fifo2_peek(f); mb(); sh_fifo2_rd_next(f);} while(0)
++
++static inline unsigned sh_fifo2_contig_num(sh_byte_fifo2 *f)
++{
++ unsigned fifo_wr_i = SH_FIFO2_M(f, *f->fifo_wr_i);
++ unsigned fifo_rd_i = SH_FIFO2_M(f, *f->fifo_rd_i);
++
++ return (fifo_wr_i >= fifo_rd_i)
++ ? fifo_wr_i - fifo_rd_i
++ : f->fifo_mask + 1u - *(f)->fifo_rd_i;
++}
++
++static inline unsigned sh_fifo2_contig_space(sh_byte_fifo2 *f)
++{
++ unsigned fifo_wr_i = SH_FIFO2_M(f, *f->fifo_wr_i);
++ unsigned fifo_rd_i = SH_FIFO2_M(f, *f->fifo_rd_i);
++
++ return (fifo_rd_i > fifo_wr_i)
++ ? fifo_rd_i - fifo_wr_i - 1
++ : (f->fifo_mask + 1u - fifo_wr_i
++ /*
++ * The last byte can't be used if the read pointer
++ * is at zero.
++ */
++ - (fifo_rd_i==0));
++}
++
++
++#endif /* NET_ACCEL_SHARED_FIFO_H */
+Index: head-2008-11-25/drivers/xen/sfc_netutil/accel_util.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netutil/accel_util.c 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,333 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#include <linux/if_ether.h>
++#include <asm/io.h>
++#include <asm/pgtable.h>
++#include <asm/hypercall.h>
++#include <xen/xenbus.h>
++#include <xen/driver_util.h>
++#include <xen/gnttab.h>
++
++#include "accel_util.h"
++
++#ifdef EFX_GCOV
++#include "gcov.h"
++
++static int __init net_accel_init(void)
++{
++ gcov_provider_init(THIS_MODULE);
++ return 0;
++}
++module_init(net_accel_init);
++
++static void __exit net_accel_exit(void)
++{
++ gcov_provider_fini(THIS_MODULE);
++}
++module_exit(net_accel_exit);
++#endif
++
++/* Shutdown remote domain that is misbehaving */
++int net_accel_shutdown_remote(int domain)
++{
++ struct sched_remote_shutdown sched_shutdown = {
++ .domain_id = domain,
++ .reason = SHUTDOWN_crash
++ };
++
++ EPRINTK("Crashing domain %d\n", domain);
++
++ return HYPERVISOR_sched_op(SCHEDOP_remote_shutdown, &sched_shutdown);
++}
++EXPORT_SYMBOL(net_accel_shutdown_remote);
++
++
++/* Based on xenbus_backend_client.c:xenbus_map_ring() */
++static int net_accel_map_grant(struct xenbus_device *dev, int gnt_ref,
++ grant_handle_t *handle, void *vaddr,
++ u64 *dev_bus_addr, unsigned flags)
++{
++ struct gnttab_map_grant_ref op;
++
++ gnttab_set_map_op(&op, (unsigned long)vaddr, flags,
++ gnt_ref, dev->otherend_id);
++
++ BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1));
++
++ if (op.status != GNTST_okay) {
++ xenbus_dev_error
++ (dev, op.status,
++ "failed mapping in shared page %d from domain %d\n",
++ gnt_ref, dev->otherend_id);
++ } else {
++ *handle = op.handle;
++ if (dev_bus_addr)
++ *dev_bus_addr = op.dev_bus_addr;
++ }
++
++ return op.status;
++}
++
++
++/* Based on xenbus_backend_client.c:xenbus_unmap_ring() */
++static int net_accel_unmap_grant(struct xenbus_device *dev,
++ grant_handle_t handle,
++ void *vaddr, u64 dev_bus_addr,
++ unsigned flags)
++{
++ struct gnttab_unmap_grant_ref op;
++
++ gnttab_set_unmap_op(&op, (unsigned long)vaddr, flags, handle);
++
++ if (dev_bus_addr)
++ op.dev_bus_addr = dev_bus_addr;
++
++ BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1));
++
++ if (op.status != GNTST_okay)
++ xenbus_dev_error(dev, op.status,
++ "failed unmapping page at handle %d error %d\n",
++ handle, op.status);
++
++ return op.status;
++}
++
++
++int net_accel_map_device_page(struct xenbus_device *dev,
++ int gnt_ref, grant_handle_t *handle,
++ u64 *dev_bus_addr)
++{
++ return net_accel_map_grant(dev, gnt_ref, handle, 0, dev_bus_addr,
++ GNTMAP_device_map);
++}
++EXPORT_SYMBOL_GPL(net_accel_map_device_page);
++
++
++int net_accel_unmap_device_page(struct xenbus_device *dev,
++ grant_handle_t handle, u64 dev_bus_addr)
++{
++ return net_accel_unmap_grant(dev, handle, 0, dev_bus_addr,
++ GNTMAP_device_map);
++}
++EXPORT_SYMBOL_GPL(net_accel_unmap_device_page);
++
++
++struct net_accel_valloc_grant_mapping {
++ struct vm_struct *vm;
++ int pages;
++ grant_handle_t grant_handles[0];
++};
++
++/* Map a series of grants into a contiguous virtual area */
++static void *net_accel_map_grants_valloc(struct xenbus_device *dev,
++ unsigned *grants, int npages,
++ unsigned flags, void **priv)
++{
++ struct net_accel_valloc_grant_mapping *map;
++ struct vm_struct *vm;
++ void *addr;
++ int i, j, rc;
++
++ vm = alloc_vm_area(PAGE_SIZE * npages);
++ if (vm == NULL) {
++ EPRINTK("No memory from alloc_vm_area.\n");
++ return NULL;
++ }
++ /*
++ * Get a structure in which we will record all the info needed
++ * to undo the mapping.
++ */
++ map = kzalloc(sizeof(struct net_accel_valloc_grant_mapping) +
++ npages * sizeof(grant_handle_t), GFP_KERNEL);
++ if (map == NULL) {
++ EPRINTK("No memory for net_accel_valloc_grant_mapping\n");
++ free_vm_area(vm);
++ return NULL;
++ }
++ map->vm = vm;
++ map->pages = npages;
++
++ /* Do the actual mapping */
++ addr = vm->addr;
++ for (i = 0; i < npages; i++) {
++ rc = net_accel_map_grant(dev, grants[i], map->grant_handles + i,
++ addr, NULL, flags);
++ if (rc != 0)
++ goto undo;
++ addr = (void*)((unsigned long)addr + PAGE_SIZE);
++ }
++
++ if (priv)
++ *priv = (void *)map;
++ else
++ kfree(map);
++
++ return vm->addr;
++
++ undo:
++ EPRINTK("Aborting contig map due to single map failure %d (%d of %d)\n",
++ rc, i+1, npages);
++ for (j = 0; j < i; j++) {
++ addr = (void*)((unsigned long)vm->addr + (j * PAGE_SIZE));
++ net_accel_unmap_grant(dev, map->grant_handles[j], addr, 0,
++ flags);
++ }
++ free_vm_area(vm);
++ kfree(map);
++ return NULL;
++}
++
++/* Undo the result of the mapping */
++static void net_accel_unmap_grants_vfree(struct xenbus_device *dev,
++ unsigned flags, void *priv)
++{
++ struct net_accel_valloc_grant_mapping *map =
++ (struct net_accel_valloc_grant_mapping *)priv;
++
++ void *addr = map->vm->addr;
++ int npages = map->pages;
++ int i;
++
++ for (i = 0; i < npages; i++) {
++ net_accel_unmap_grant(dev, map->grant_handles[i], addr, 0,
++ flags);
++ addr = (void*)((unsigned long)addr + PAGE_SIZE);
++ }
++ free_vm_area(map->vm);
++ kfree(map);
++}
++
++
++void *net_accel_map_grants_contig(struct xenbus_device *dev,
++ unsigned *grants, int npages,
++ void **priv)
++{
++ return net_accel_map_grants_valloc(dev, grants, npages,
++ GNTMAP_host_map, priv);
++}
++EXPORT_SYMBOL(net_accel_map_grants_contig);
++
++
++void net_accel_unmap_grants_contig(struct xenbus_device *dev,
++ void *priv)
++{
++ net_accel_unmap_grants_vfree(dev, GNTMAP_host_map, priv);
++}
++EXPORT_SYMBOL(net_accel_unmap_grants_contig);
++
++
++void *net_accel_map_iomem_page(struct xenbus_device *dev, int gnt_ref,
++ void **priv)
++{
++ return net_accel_map_grants_valloc(dev, &gnt_ref, 1,
++ GNTMAP_host_map, priv);
++}
++EXPORT_SYMBOL(net_accel_map_iomem_page);
++
++
++void net_accel_unmap_iomem_page(struct xenbus_device *dev, void *priv)
++{
++ net_accel_unmap_grants_vfree(dev, GNTMAP_host_map, priv);
++}
++EXPORT_SYMBOL(net_accel_unmap_iomem_page);
++
++
++int net_accel_grant_page(struct xenbus_device *dev, unsigned long mfn,
++ int is_iomem)
++{
++ int err = gnttab_grant_foreign_access(dev->otherend_id, mfn,
++ is_iomem ? GTF_PCD : 0);
++ if (err < 0)
++ xenbus_dev_error(dev, err, "failed granting access to page\n");
++ return err;
++}
++EXPORT_SYMBOL_GPL(net_accel_grant_page);
++
++
++int net_accel_ungrant_page(grant_ref_t gntref)
++{
++ if (unlikely(gnttab_query_foreign_access(gntref) != 0)) {
++ EPRINTK("%s: remote domain still using grant %d\n", __FUNCTION__,
++ gntref);
++ return -EBUSY;
++ }
++
++ gnttab_end_foreign_access(gntref, 0);
++ return 0;
++}
++EXPORT_SYMBOL_GPL(net_accel_ungrant_page);
++
++
++int net_accel_xen_net_read_mac(struct xenbus_device *dev, u8 mac[])
++{
++ char *s, *e, *macstr;
++ int i;
++
++ macstr = s = xenbus_read(XBT_NIL, dev->nodename, "mac", NULL);
++ if (IS_ERR(macstr))
++ return PTR_ERR(macstr);
++
++ for (i = 0; i < ETH_ALEN; i++) {
++ mac[i] = simple_strtoul(s, &e, 16);
++ if ((s == e) || (*e != ((i == ETH_ALEN-1) ? '\0' : ':'))) {
++ kfree(macstr);
++ return -ENOENT;
++ }
++ s = e+1;
++ }
++
++ kfree(macstr);
++ return 0;
++}
++EXPORT_SYMBOL_GPL(net_accel_xen_net_read_mac);
++
++
++void net_accel_update_state(struct xenbus_device *dev, int state)
++{
++ struct xenbus_transaction tr;
++ int err;
++
++ DPRINTK("%s: setting accelstate to %s\n", __FUNCTION__,
++ xenbus_strstate(state));
++
++ if (xenbus_exists(XBT_NIL, dev->nodename, "")) {
++ VPRINTK("%s: nodename %s\n", __FUNCTION__, dev->nodename);
++ again:
++ err = xenbus_transaction_start(&tr);
++ if (err == 0)
++ err = xenbus_printf(tr, dev->nodename, "accelstate",
++ "%d", state);
++ if (err != 0) {
++ xenbus_transaction_end(tr, 1);
++ } else {
++ err = xenbus_transaction_end(tr, 0);
++ if (err == -EAGAIN)
++ goto again;
++ }
++ }
++}
++EXPORT_SYMBOL_GPL(net_accel_update_state);
++
++MODULE_LICENSE("GPL");
+Index: head-2008-11-25/drivers/xen/sfc_netutil/accel_util.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/sfc_netutil/accel_util.h 2008-02-20 09:32:49.000000000 +0100
+@@ -0,0 +1,127 @@
++/****************************************************************************
++ * Solarflare driver for Xen network acceleration
++ *
++ * Copyright 2006-2008: Solarflare Communications Inc,
++ * 9501 Jeronimo Road, Suite 250,
++ * Irvine, CA 92618, USA
++ *
++ * Maintained by Solarflare Communications <linux-xen-drivers@solarflare.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation, incorporated herein by reference.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++ ****************************************************************************
++ */
++
++#ifndef NETBACK_ACCEL_UTIL_H
++#define NETBACK_ACCEL_UTIL_H
++
++#ifdef DPRINTK
++#undef DPRINTK
++#endif
++
++#define FILE_LEAF strrchr(__FILE__, '/') ? strrchr(__FILE__, '/') + 1 : __FILE__
++
++#if 1
++#define VPRINTK(_f, _a...)
++#else
++#define VPRINTK(_f, _a...) \
++ printk("(file=%s, line=%d) " _f, \
++ FILE_LEAF , __LINE__ , ## _a )
++#endif
++
++#if 1
++#define DPRINTK(_f, _a...)
++#else
++#define DPRINTK(_f, _a...) \
++ printk("(file=%s, line=%d) " _f, \
++ FILE_LEAF , __LINE__ , ## _a )
++#endif
++
++#define EPRINTK(_f, _a...) \
++ printk("(file=%s, line=%d) " _f, \
++ FILE_LEAF , __LINE__ , ## _a )
++
++#define EPRINTK_ON(exp) \
++ do { \
++ if (exp) \
++ EPRINTK("%s at %s:%d\n", #exp, __FILE__, __LINE__); \
++ } while(0)
++
++#define DPRINTK_ON(exp) \
++ do { \
++ if (exp) \
++ DPRINTK("%s at %s:%d\n", #exp, __FILE__, __LINE__); \
++ } while(0)
++
++#define MAC_FMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
++#define MAC_ARG(_mac) (_mac)[0], (_mac)[1], (_mac)[2], (_mac)[3], (_mac)[4], (_mac)[5]
++
++#include <xen/xenbus.h>
++
++/*! Map a set of pages from another domain
++ * \param dev The xenbus device context
++ * \param priv The private data returned by the mapping function
++ */
++extern
++void *net_accel_map_grants_contig(struct xenbus_device *dev,
++ unsigned *grants, int npages,
++ void **priv);
++
++/*! Unmap a set of pages mapped using net_accel_map_grants_contig.
++ * \param dev The xenbus device context
++ * \param priv The private data returned by the mapping function
++ */
++extern
++void net_accel_unmap_grants_contig(struct xenbus_device *dev, void *priv);
++
++/*! Read the MAC address of a device from xenstore */
++extern
++int net_accel_xen_net_read_mac(struct xenbus_device *dev, u8 mac[]);
++
++/*! Update the accelstate field for a device in xenstore */
++extern
++void net_accel_update_state(struct xenbus_device *dev, int state);
++
++/* These four map/unmap functions are based on
++ * xenbus_backend_client.c:xenbus_map_ring(). However, they are not
++ * used for ring buffers, instead just to map pages between domains,
++ * or to map a page so that it is accessible by a device
++ */
++extern
++int net_accel_map_device_page(struct xenbus_device *dev,
++ int gnt_ref, grant_handle_t *handle,
++ u64 *dev_bus_addr);
++extern
++int net_accel_unmap_device_page(struct xenbus_device *dev,
++ grant_handle_t handle, u64 dev_bus_addr);
++extern
++void *net_accel_map_iomem_page(struct xenbus_device *dev, int gnt_ref,
++ void **priv);
++extern
++void net_accel_unmap_iomem_page(struct xenbus_device *dev, void *priv);
++
++/*! Grrant a page to remote domain */
++extern
++int net_accel_grant_page(struct xenbus_device *dev, unsigned long mfn,
++ int is_iomem);
++/*! Undo a net_accel_grant_page */
++extern
++int net_accel_ungrant_page(grant_ref_t gntref);
++
++
++/*! Shutdown remote domain that is misbehaving */
++extern
++int net_accel_shutdown_remote(int domain);
++
++
++#endif
+Index: head-2008-11-25/drivers/xen/tpmback/Makefile
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/tpmback/Makefile 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,4 @@
++
++obj-$(CONFIG_XEN_TPMDEV_BACKEND) += tpmbk.o
++
++tpmbk-y += tpmback.o interface.o xenbus.o
+Index: head-2008-11-25/drivers/xen/tpmback/common.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/tpmback/common.h 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,85 @@
++/******************************************************************************
++ * drivers/xen/tpmback/common.h
++ */
++
++#ifndef __TPM__BACKEND__COMMON_H__
++#define __TPM__BACKEND__COMMON_H__
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/interrupt.h>
++#include <linux/slab.h>
++#include <xen/evtchn.h>
++#include <xen/driver_util.h>
++#include <xen/interface/grant_table.h>
++#include <xen/interface/io/tpmif.h>
++#include <asm/io.h>
++#include <asm/pgalloc.h>
++
++#define DPRINTK(_f, _a...) \
++ pr_debug("(file=%s, line=%d) " _f, \
++ __FILE__ , __LINE__ , ## _a )
++
++struct backend_info;
++
++typedef struct tpmif_st {
++ struct list_head tpmif_list;
++ /* Unique identifier for this interface. */
++ domid_t domid;
++ unsigned int handle;
++
++ /* Physical parameters of the comms window. */
++ unsigned int irq;
++
++ /* The shared rings and indexes. */
++ tpmif_tx_interface_t *tx;
++ struct vm_struct *tx_area;
++
++ /* Miscellaneous private stuff. */
++ enum { DISCONNECTED, DISCONNECTING, CONNECTED } status;
++ int active;
++
++ struct tpmif_st *hash_next;
++ struct list_head list; /* scheduling list */
++ atomic_t refcnt;
++
++ struct backend_info *bi;
++
++ grant_handle_t shmem_handle;
++ grant_ref_t shmem_ref;
++ struct page **mmap_pages;
++
++ char devname[20];
++} tpmif_t;
++
++void tpmif_disconnect_complete(tpmif_t * tpmif);
++tpmif_t *tpmif_find(domid_t domid, struct backend_info *bi);
++void tpmif_interface_init(void);
++void tpmif_interface_exit(void);
++void tpmif_schedule_work(tpmif_t * tpmif);
++void tpmif_deschedule_work(tpmif_t * tpmif);
++void tpmif_xenbus_init(void);
++void tpmif_xenbus_exit(void);
++int tpmif_map(tpmif_t *tpmif, unsigned long shared_page, unsigned int evtchn);
++irqreturn_t tpmif_be_int(int irq, void *dev_id, struct pt_regs *regs);
++
++long int tpmback_get_instance(struct backend_info *bi);
++
++int vtpm_release_packets(tpmif_t * tpmif, int send_msgs);
++
++
++#define tpmif_get(_b) (atomic_inc(&(_b)->refcnt))
++#define tpmif_put(_b) \
++ do { \
++ if (atomic_dec_and_test(&(_b)->refcnt)) \
++ tpmif_disconnect_complete(_b); \
++ } while (0)
++
++extern int num_frontends;
++
++static inline unsigned long idx_to_kaddr(tpmif_t *t, unsigned int idx)
++{
++ return (unsigned long)pfn_to_kaddr(page_to_pfn(t->mmap_pages[idx]));
++}
++
++#endif /* __TPMIF__BACKEND__COMMON_H__ */
+Index: head-2008-11-25/drivers/xen/tpmback/interface.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/tpmback/interface.c 2008-01-21 11:15:26.000000000 +0100
+@@ -0,0 +1,168 @@
++ /*****************************************************************************
++ * drivers/xen/tpmback/interface.c
++ *
++ * Vritual TPM interface management.
++ *
++ * Copyright (c) 2005, IBM Corporation
++ *
++ * Author: Stefan Berger, stefanb@us.ibm.com
++ *
++ * This code has been derived from drivers/xen/netback/interface.c
++ * Copyright (c) 2004, Keir Fraser
++ */
++
++#include "common.h"
++#include <xen/balloon.h>
++#include <xen/gnttab.h>
++
++static kmem_cache_t *tpmif_cachep;
++int num_frontends = 0;
++
++LIST_HEAD(tpmif_list);
++
++static tpmif_t *alloc_tpmif(domid_t domid, struct backend_info *bi)
++{
++ tpmif_t *tpmif;
++
++ tpmif = kmem_cache_alloc(tpmif_cachep, GFP_KERNEL);
++ if (tpmif == NULL)
++ goto out_of_memory;
++
++ memset(tpmif, 0, sizeof (*tpmif));
++ tpmif->domid = domid;
++ tpmif->status = DISCONNECTED;
++ tpmif->bi = bi;
++ snprintf(tpmif->devname, sizeof(tpmif->devname), "tpmif%d", domid);
++ atomic_set(&tpmif->refcnt, 1);
++
++ tpmif->mmap_pages = alloc_empty_pages_and_pagevec(TPMIF_TX_RING_SIZE);
++ if (tpmif->mmap_pages == NULL)
++ goto out_of_memory;
++
++ list_add(&tpmif->tpmif_list, &tpmif_list);
++ num_frontends++;
++
++ return tpmif;
++
++ out_of_memory:
++ if (tpmif != NULL)
++ kmem_cache_free(tpmif_cachep, tpmif);
++ printk("%s: out of memory\n", __FUNCTION__);
++ return ERR_PTR(-ENOMEM);
++}
++
++static void free_tpmif(tpmif_t * tpmif)
++{
++ num_frontends--;
++ list_del(&tpmif->tpmif_list);
++ free_empty_pages_and_pagevec(tpmif->mmap_pages, TPMIF_TX_RING_SIZE);
++ kmem_cache_free(tpmif_cachep, tpmif);
++}
++
++tpmif_t *tpmif_find(domid_t domid, struct backend_info *bi)
++{
++ tpmif_t *tpmif;
++
++ list_for_each_entry(tpmif, &tpmif_list, tpmif_list) {
++ if (tpmif->bi == bi) {
++ if (tpmif->domid == domid) {
++ tpmif_get(tpmif);
++ return tpmif;
++ } else {
++ return ERR_PTR(-EEXIST);
++ }
++ }
++ }
++
++ return alloc_tpmif(domid, bi);
++}
++
++static int map_frontend_page(tpmif_t *tpmif, unsigned long shared_page)
++{
++ struct gnttab_map_grant_ref op;
++
++ gnttab_set_map_op(&op, (unsigned long)tpmif->tx_area->addr,
++ GNTMAP_host_map, shared_page, tpmif->domid);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status) {
++ DPRINTK(" Grant table operation failure !\n");
++ return op.status;
++ }
++
++ tpmif->shmem_ref = shared_page;
++ tpmif->shmem_handle = op.handle;
++
++ return 0;
++}
++
++static void unmap_frontend_page(tpmif_t *tpmif)
++{
++ struct gnttab_unmap_grant_ref op;
++
++ gnttab_set_unmap_op(&op, (unsigned long)tpmif->tx_area->addr,
++ GNTMAP_host_map, tpmif->shmem_handle);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++}
++
++int tpmif_map(tpmif_t *tpmif, unsigned long shared_page, unsigned int evtchn)
++{
++ int err;
++
++ if (tpmif->irq)
++ return 0;
++
++ if ((tpmif->tx_area = alloc_vm_area(PAGE_SIZE)) == NULL)
++ return -ENOMEM;
++
++ err = map_frontend_page(tpmif, shared_page);
++ if (err) {
++ free_vm_area(tpmif->tx_area);
++ return err;
++ }
++
++ tpmif->tx = (tpmif_tx_interface_t *)tpmif->tx_area->addr;
++ memset(tpmif->tx, 0, PAGE_SIZE);
++
++ err = bind_interdomain_evtchn_to_irqhandler(
++ tpmif->domid, evtchn, tpmif_be_int, 0, tpmif->devname, tpmif);
++ if (err < 0) {
++ unmap_frontend_page(tpmif);
++ free_vm_area(tpmif->tx_area);
++ return err;
++ }
++ tpmif->irq = err;
++
++ tpmif->shmem_ref = shared_page;
++ tpmif->active = 1;
++
++ return 0;
++}
++
++void tpmif_disconnect_complete(tpmif_t *tpmif)
++{
++ if (tpmif->irq)
++ unbind_from_irqhandler(tpmif->irq, tpmif);
++
++ if (tpmif->tx) {
++ unmap_frontend_page(tpmif);
++ free_vm_area(tpmif->tx_area);
++ }
++
++ free_tpmif(tpmif);
++}
++
++void __init tpmif_interface_init(void)
++{
++ tpmif_cachep = kmem_cache_create("tpmif_cache", sizeof (tpmif_t),
++ 0, 0, NULL, NULL);
++}
++
++void __exit tpmif_interface_exit(void)
++{
++ kmem_cache_destroy(tpmif_cachep);
++}
+Index: head-2008-11-25/drivers/xen/tpmback/tpmback.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/tpmback/tpmback.c 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,944 @@
++/******************************************************************************
++ * drivers/xen/tpmback/tpmback.c
++ *
++ * Copyright (c) 2005, IBM Corporation
++ *
++ * Author: Stefan Berger, stefanb@us.ibm.com
++ * Grant table support: Mahadevan Gomathisankaran
++ *
++ * This code has been derived from drivers/xen/netback/netback.c
++ * Copyright (c) 2002-2004, K A Fraser
++ *
++ */
++
++#include "common.h"
++#include <xen/evtchn.h>
++
++#include <linux/types.h>
++#include <linux/list.h>
++#include <linux/miscdevice.h>
++#include <linux/poll.h>
++#include <asm/uaccess.h>
++#include <xen/xenbus.h>
++#include <xen/interface/grant_table.h>
++#include <xen/gnttab.h>
++
++/* local data structures */
++struct data_exchange {
++ struct list_head pending_pak;
++ struct list_head current_pak;
++ unsigned int copied_so_far;
++ u8 has_opener:1;
++ u8 aborted:1;
++ rwlock_t pak_lock; // protects all of the previous fields
++ wait_queue_head_t wait_queue;
++};
++
++struct vtpm_resp_hdr {
++ uint32_t instance_no;
++ uint16_t tag_no;
++ uint32_t len_no;
++ uint32_t ordinal_no;
++} __attribute__ ((packed));
++
++struct packet {
++ struct list_head next;
++ unsigned int data_len;
++ u8 *data_buffer;
++ tpmif_t *tpmif;
++ u32 tpm_instance;
++ u8 req_tag;
++ u32 last_read;
++ u8 flags;
++ struct timer_list processing_timer;
++};
++
++enum {
++ PACKET_FLAG_DISCARD_RESPONSE = 1,
++};
++
++/* local variables */
++static struct data_exchange dataex;
++
++/* local function prototypes */
++static int _packet_write(struct packet *pak,
++ const char *data, size_t size, int userbuffer);
++static void processing_timeout(unsigned long ptr);
++static int packet_read_shmem(struct packet *pak,
++ tpmif_t * tpmif,
++ u32 offset,
++ char *buffer, int isuserbuffer, u32 left);
++static int vtpm_queue_packet(struct packet *pak);
++
++/***************************************************************
++ Buffer copying fo user and kernel space buffes.
++***************************************************************/
++static inline int copy_from_buffer(void *to,
++ const void *from, unsigned long size,
++ int isuserbuffer)
++{
++ if (isuserbuffer) {
++ if (copy_from_user(to, (void __user *)from, size))
++ return -EFAULT;
++ } else {
++ memcpy(to, from, size);
++ }
++ return 0;
++}
++
++static inline int copy_to_buffer(void *to,
++ const void *from, unsigned long size,
++ int isuserbuffer)
++{
++ if (isuserbuffer) {
++ if (copy_to_user((void __user *)to, from, size))
++ return -EFAULT;
++ } else {
++ memcpy(to, from, size);
++ }
++ return 0;
++}
++
++
++static void dataex_init(struct data_exchange *dataex)
++{
++ INIT_LIST_HEAD(&dataex->pending_pak);
++ INIT_LIST_HEAD(&dataex->current_pak);
++ dataex->has_opener = 0;
++ rwlock_init(&dataex->pak_lock);
++ init_waitqueue_head(&dataex->wait_queue);
++}
++
++/***************************************************************
++ Packet-related functions
++***************************************************************/
++
++static struct packet *packet_find_instance(struct list_head *head,
++ u32 tpm_instance)
++{
++ struct packet *pak;
++ struct list_head *p;
++
++ /*
++ * traverse the list of packets and return the first
++ * one with the given instance number
++ */
++ list_for_each(p, head) {
++ pak = list_entry(p, struct packet, next);
++
++ if (pak->tpm_instance == tpm_instance) {
++ return pak;
++ }
++ }
++ return NULL;
++}
++
++static struct packet *packet_find_packet(struct list_head *head, void *packet)
++{
++ struct packet *pak;
++ struct list_head *p;
++
++ /*
++ * traverse the list of packets and return the first
++ * one with the given instance number
++ */
++ list_for_each(p, head) {
++ pak = list_entry(p, struct packet, next);
++
++ if (pak == packet) {
++ return pak;
++ }
++ }
++ return NULL;
++}
++
++static struct packet *packet_alloc(tpmif_t * tpmif,
++ u32 size, u8 req_tag, u8 flags)
++{
++ struct packet *pak = NULL;
++ pak = kzalloc(sizeof (struct packet), GFP_ATOMIC);
++ if (NULL != pak) {
++ if (tpmif) {
++ pak->tpmif = tpmif;
++ pak->tpm_instance = tpmback_get_instance(tpmif->bi);
++ tpmif_get(tpmif);
++ }
++ pak->data_len = size;
++ pak->req_tag = req_tag;
++ pak->last_read = 0;
++ pak->flags = flags;
++
++ /*
++ * cannot do tpmif_get(tpmif); bad things happen
++ * on the last tpmif_put()
++ */
++ init_timer(&pak->processing_timer);
++ pak->processing_timer.function = processing_timeout;
++ pak->processing_timer.data = (unsigned long)pak;
++ }
++ return pak;
++}
++
++static void inline packet_reset(struct packet *pak)
++{
++ pak->last_read = 0;
++}
++
++static void packet_free(struct packet *pak)
++{
++ if (timer_pending(&pak->processing_timer)) {
++ BUG();
++ }
++
++ if (pak->tpmif)
++ tpmif_put(pak->tpmif);
++ kfree(pak->data_buffer);
++ /*
++ * cannot do tpmif_put(pak->tpmif); bad things happen
++ * on the last tpmif_put()
++ */
++ kfree(pak);
++}
++
++
++/*
++ * Write data to the shared memory and send it to the FE.
++ */
++static int packet_write(struct packet *pak,
++ const char *data, size_t size, int isuserbuffer)
++{
++ int rc = 0;
++
++ if (0 != (pak->flags & PACKET_FLAG_DISCARD_RESPONSE)) {
++ /* Don't send a respone to this packet. Just acknowledge it. */
++ rc = size;
++ } else {
++ rc = _packet_write(pak, data, size, isuserbuffer);
++ }
++
++ return rc;
++}
++
++int _packet_write(struct packet *pak,
++ const char *data, size_t size, int isuserbuffer)
++{
++ /*
++ * Write into the shared memory pages directly
++ * and send it to the front end.
++ */
++ tpmif_t *tpmif = pak->tpmif;
++ grant_handle_t handle;
++ int rc = 0;
++ unsigned int i = 0;
++ unsigned int offset = 0;
++
++ if (tpmif == NULL) {
++ return -EFAULT;
++ }
++
++ if (tpmif->status == DISCONNECTED) {
++ return size;
++ }
++
++ while (offset < size && i < TPMIF_TX_RING_SIZE) {
++ unsigned int tocopy;
++ struct gnttab_map_grant_ref map_op;
++ struct gnttab_unmap_grant_ref unmap_op;
++ tpmif_tx_request_t *tx;
++
++ tx = &tpmif->tx->ring[i].req;
++
++ if (0 == tx->addr) {
++ DPRINTK("ERROR: Buffer for outgoing packet NULL?! i=%d\n", i);
++ return 0;
++ }
++
++ gnttab_set_map_op(&map_op, idx_to_kaddr(tpmif, i),
++ GNTMAP_host_map, tx->ref, tpmif->domid);
++
++ if (unlikely(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref,
++ &map_op, 1))) {
++ BUG();
++ }
++
++ handle = map_op.handle;
++
++ if (map_op.status) {
++ DPRINTK(" Grant table operation failure !\n");
++ return 0;
++ }
++
++ tocopy = min_t(size_t, size - offset, PAGE_SIZE);
++
++ if (copy_from_buffer((void *)(idx_to_kaddr(tpmif, i) |
++ (tx->addr & ~PAGE_MASK)),
++ &data[offset], tocopy, isuserbuffer)) {
++ tpmif_put(tpmif);
++ return -EFAULT;
++ }
++ tx->size = tocopy;
++
++ gnttab_set_unmap_op(&unmap_op, idx_to_kaddr(tpmif, i),
++ GNTMAP_host_map, handle);
++
++ if (unlikely
++ (HYPERVISOR_grant_table_op
++ (GNTTABOP_unmap_grant_ref, &unmap_op, 1))) {
++ BUG();
++ }
++
++ offset += tocopy;
++ i++;
++ }
++
++ rc = offset;
++ DPRINTK("Notifying frontend via irq %d\n", tpmif->irq);
++ notify_remote_via_irq(tpmif->irq);
++
++ return rc;
++}
++
++/*
++ * Read data from the shared memory and copy it directly into the
++ * provided buffer. Advance the read_last indicator which tells
++ * how many bytes have already been read.
++ */
++static int packet_read(struct packet *pak, size_t numbytes,
++ char *buffer, size_t buffersize, int isuserbuffer)
++{
++ tpmif_t *tpmif = pak->tpmif;
++
++ /*
++ * Read 'numbytes' of data from the buffer. The first 4
++ * bytes are the instance number in network byte order,
++ * after that come the data from the shared memory buffer.
++ */
++ u32 to_copy;
++ u32 offset = 0;
++ u32 room_left = buffersize;
++
++ if (pak->last_read < 4) {
++ /*
++ * copy the instance number into the buffer
++ */
++ u32 instance_no = htonl(pak->tpm_instance);
++ u32 last_read = pak->last_read;
++
++ to_copy = min_t(size_t, 4 - last_read, numbytes);
++
++ if (copy_to_buffer(&buffer[0],
++ &(((u8 *) & instance_no)[last_read]),
++ to_copy, isuserbuffer)) {
++ return -EFAULT;
++ }
++
++ pak->last_read += to_copy;
++ offset += to_copy;
++ room_left -= to_copy;
++ }
++
++ /*
++ * If the packet has a data buffer appended, read from it...
++ */
++
++ if (room_left > 0) {
++ if (pak->data_buffer) {
++ u32 to_copy = min_t(u32, pak->data_len - offset, room_left);
++ u32 last_read = pak->last_read - 4;
++
++ if (copy_to_buffer(&buffer[offset],
++ &pak->data_buffer[last_read],
++ to_copy, isuserbuffer)) {
++ return -EFAULT;
++ }
++ pak->last_read += to_copy;
++ offset += to_copy;
++ } else {
++ offset = packet_read_shmem(pak,
++ tpmif,
++ offset,
++ buffer,
++ isuserbuffer, room_left);
++ }
++ }
++ return offset;
++}
++
++static int packet_read_shmem(struct packet *pak,
++ tpmif_t * tpmif,
++ u32 offset, char *buffer, int isuserbuffer,
++ u32 room_left)
++{
++ u32 last_read = pak->last_read - 4;
++ u32 i = (last_read / PAGE_SIZE);
++ u32 pg_offset = last_read & (PAGE_SIZE - 1);
++ u32 to_copy;
++ grant_handle_t handle;
++
++ tpmif_tx_request_t *tx;
++
++ tx = &tpmif->tx->ring[0].req;
++ /*
++ * Start copying data at the page with index 'index'
++ * and within that page at offset 'offset'.
++ * Copy a maximum of 'room_left' bytes.
++ */
++ to_copy = min_t(u32, PAGE_SIZE - pg_offset, room_left);
++ while (to_copy > 0) {
++ void *src;
++ struct gnttab_map_grant_ref map_op;
++ struct gnttab_unmap_grant_ref unmap_op;
++
++ tx = &tpmif->tx->ring[i].req;
++
++ gnttab_set_map_op(&map_op, idx_to_kaddr(tpmif, i),
++ GNTMAP_host_map, tx->ref, tpmif->domid);
++
++ if (unlikely(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref,
++ &map_op, 1))) {
++ BUG();
++ }
++
++ if (map_op.status) {
++ DPRINTK(" Grant table operation failure !\n");
++ return -EFAULT;
++ }
++
++ handle = map_op.handle;
++
++ if (to_copy > tx->size) {
++ /*
++ * User requests more than what's available
++ */
++ to_copy = min_t(u32, tx->size, to_copy);
++ }
++
++ DPRINTK("Copying from mapped memory at %08lx\n",
++ (unsigned long)(idx_to_kaddr(tpmif, i) |
++ (tx->addr & ~PAGE_MASK)));
++
++ src = (void *)(idx_to_kaddr(tpmif, i) |
++ ((tx->addr & ~PAGE_MASK) + pg_offset));
++ if (copy_to_buffer(&buffer[offset],
++ src, to_copy, isuserbuffer)) {
++ return -EFAULT;
++ }
++
++ DPRINTK("Data from TPM-FE of domain %d are %d %d %d %d\n",
++ tpmif->domid, buffer[offset], buffer[offset + 1],
++ buffer[offset + 2], buffer[offset + 3]);
++
++ gnttab_set_unmap_op(&unmap_op, idx_to_kaddr(tpmif, i),
++ GNTMAP_host_map, handle);
++
++ if (unlikely
++ (HYPERVISOR_grant_table_op
++ (GNTTABOP_unmap_grant_ref, &unmap_op, 1))) {
++ BUG();
++ }
++
++ offset += to_copy;
++ pg_offset = 0;
++ last_read += to_copy;
++ room_left -= to_copy;
++
++ to_copy = min_t(u32, PAGE_SIZE, room_left);
++ i++;
++ } /* while (to_copy > 0) */
++ /*
++ * Adjust the last_read pointer
++ */
++ pak->last_read = last_read + 4;
++ return offset;
++}
++
++/* ============================================================
++ * The file layer for reading data from this device
++ * ============================================================
++ */
++static int vtpm_op_open(struct inode *inode, struct file *f)
++{
++ int rc = 0;
++ unsigned long flags;
++
++ write_lock_irqsave(&dataex.pak_lock, flags);
++ if (dataex.has_opener == 0) {
++ dataex.has_opener = 1;
++ } else {
++ rc = -EPERM;
++ }
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++ return rc;
++}
++
++static ssize_t vtpm_op_read(struct file *file,
++ char __user * data, size_t size, loff_t * offset)
++{
++ int ret_size = -ENODATA;
++ struct packet *pak = NULL;
++ unsigned long flags;
++
++ write_lock_irqsave(&dataex.pak_lock, flags);
++ if (dataex.aborted) {
++ dataex.aborted = 0;
++ dataex.copied_so_far = 0;
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++ return -EIO;
++ }
++
++ if (list_empty(&dataex.pending_pak)) {
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++ wait_event_interruptible(dataex.wait_queue,
++ !list_empty(&dataex.pending_pak));
++ write_lock_irqsave(&dataex.pak_lock, flags);
++ dataex.copied_so_far = 0;
++ }
++
++ if (!list_empty(&dataex.pending_pak)) {
++ unsigned int left;
++
++ pak = list_entry(dataex.pending_pak.next, struct packet, next);
++ left = pak->data_len - dataex.copied_so_far;
++ list_del(&pak->next);
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++
++ DPRINTK("size given by app: %d, available: %d\n", size, left);
++
++ ret_size = min_t(size_t, size, left);
++
++ ret_size = packet_read(pak, ret_size, data, size, 1);
++
++ write_lock_irqsave(&dataex.pak_lock, flags);
++
++ if (ret_size < 0) {
++ del_singleshot_timer_sync(&pak->processing_timer);
++ packet_free(pak);
++ dataex.copied_so_far = 0;
++ } else {
++ DPRINTK("Copied %d bytes to user buffer\n", ret_size);
++
++ dataex.copied_so_far += ret_size;
++ if (dataex.copied_so_far >= pak->data_len + 4) {
++ DPRINTK("All data from this packet given to app.\n");
++ /* All data given to app */
++
++ del_singleshot_timer_sync(&pak->
++ processing_timer);
++ list_add_tail(&pak->next, &dataex.current_pak);
++ /*
++ * The more fontends that are handled at the same time,
++ * the more time we give the TPM to process the request.
++ */
++ mod_timer(&pak->processing_timer,
++ jiffies + (num_frontends * 60 * HZ));
++ dataex.copied_so_far = 0;
++ } else {
++ list_add(&pak->next, &dataex.pending_pak);
++ }
++ }
++ }
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++
++ DPRINTK("Returning result from read to app: %d\n", ret_size);
++
++ return ret_size;
++}
++
++/*
++ * Write operation - only works after a previous read operation!
++ */
++static ssize_t vtpm_op_write(struct file *file,
++ const char __user * data, size_t size,
++ loff_t * offset)
++{
++ struct packet *pak;
++ int rc = 0;
++ unsigned int off = 4;
++ unsigned long flags;
++ struct vtpm_resp_hdr vrh;
++
++ /*
++ * Minimum required packet size is:
++ * 4 bytes for instance number
++ * 2 bytes for tag
++ * 4 bytes for paramSize
++ * 4 bytes for the ordinal
++ * sum: 14 bytes
++ */
++ if (size < sizeof (vrh))
++ return -EFAULT;
++
++ if (copy_from_user(&vrh, data, sizeof (vrh)))
++ return -EFAULT;
++
++ /* malformed packet? */
++ if ((off + ntohl(vrh.len_no)) != size)
++ return -EFAULT;
++
++ write_lock_irqsave(&dataex.pak_lock, flags);
++ pak = packet_find_instance(&dataex.current_pak,
++ ntohl(vrh.instance_no));
++
++ if (pak == NULL) {
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++ DPRINTK(KERN_ALERT "No associated packet! (inst=%d)\n",
++ ntohl(vrh.instance_no));
++ return -EFAULT;
++ }
++
++ del_singleshot_timer_sync(&pak->processing_timer);
++ list_del(&pak->next);
++
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++
++ /*
++ * The first 'offset' bytes must be the instance number - skip them.
++ */
++ size -= off;
++
++ rc = packet_write(pak, &data[off], size, 1);
++
++ if (rc > 0) {
++ /* I neglected the first 4 bytes */
++ rc += off;
++ }
++ packet_free(pak);
++ return rc;
++}
++
++static int vtpm_op_release(struct inode *inode, struct file *file)
++{
++ unsigned long flags;
++
++ vtpm_release_packets(NULL, 1);
++ write_lock_irqsave(&dataex.pak_lock, flags);
++ dataex.has_opener = 0;
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++ return 0;
++}
++
++static unsigned int vtpm_op_poll(struct file *file,
++ struct poll_table_struct *pts)
++{
++ unsigned int flags = POLLOUT | POLLWRNORM;
++
++ poll_wait(file, &dataex.wait_queue, pts);
++ if (!list_empty(&dataex.pending_pak)) {
++ flags |= POLLIN | POLLRDNORM;
++ }
++ return flags;
++}
++
++static const struct file_operations vtpm_ops = {
++ .owner = THIS_MODULE,
++ .llseek = no_llseek,
++ .open = vtpm_op_open,
++ .read = vtpm_op_read,
++ .write = vtpm_op_write,
++ .release = vtpm_op_release,
++ .poll = vtpm_op_poll,
++};
++
++static struct miscdevice vtpms_miscdevice = {
++ .minor = 225,
++ .name = "vtpm",
++ .fops = &vtpm_ops,
++};
++
++/***************************************************************
++ Utility functions
++***************************************************************/
++
++static int tpm_send_fail_message(struct packet *pak, u8 req_tag)
++{
++ int rc;
++ static const unsigned char tpm_error_message_fail[] = {
++ 0x00, 0x00,
++ 0x00, 0x00, 0x00, 0x0a,
++ 0x00, 0x00, 0x00, 0x09 /* TPM_FAIL */
++ };
++ unsigned char buffer[sizeof (tpm_error_message_fail)];
++
++ memcpy(buffer, tpm_error_message_fail,
++ sizeof (tpm_error_message_fail));
++ /*
++ * Insert the right response tag depending on the given tag
++ * All response tags are '+3' to the request tag.
++ */
++ buffer[1] = req_tag + 3;
++
++ /*
++ * Write the data to shared memory and notify the front-end
++ */
++ rc = packet_write(pak, buffer, sizeof (buffer), 0);
++
++ return rc;
++}
++
++static int _vtpm_release_packets(struct list_head *head,
++ tpmif_t * tpmif, int send_msgs)
++{
++ int aborted = 0;
++ int c = 0;
++ struct packet *pak;
++ struct list_head *pos, *tmp;
++
++ list_for_each_safe(pos, tmp, head) {
++ pak = list_entry(pos, struct packet, next);
++ c += 1;
++
++ if (tpmif == NULL || pak->tpmif == tpmif) {
++ int can_send = 0;
++
++ del_singleshot_timer_sync(&pak->processing_timer);
++ list_del(&pak->next);
++
++ if (pak->tpmif && pak->tpmif->status == CONNECTED) {
++ can_send = 1;
++ }
++
++ if (send_msgs && can_send) {
++ tpm_send_fail_message(pak, pak->req_tag);
++ }
++ packet_free(pak);
++ if (c == 1)
++ aborted = 1;
++ }
++ }
++ return aborted;
++}
++
++int vtpm_release_packets(tpmif_t * tpmif, int send_msgs)
++{
++ unsigned long flags;
++
++ write_lock_irqsave(&dataex.pak_lock, flags);
++
++ dataex.aborted = _vtpm_release_packets(&dataex.pending_pak,
++ tpmif,
++ send_msgs);
++ _vtpm_release_packets(&dataex.current_pak, tpmif, send_msgs);
++
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++ return 0;
++}
++
++static int vtpm_queue_packet(struct packet *pak)
++{
++ int rc = 0;
++
++ if (dataex.has_opener) {
++ unsigned long flags;
++
++ write_lock_irqsave(&dataex.pak_lock, flags);
++ list_add_tail(&pak->next, &dataex.pending_pak);
++ /* give the TPM some time to pick up the request */
++ mod_timer(&pak->processing_timer, jiffies + (30 * HZ));
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++
++ wake_up_interruptible(&dataex.wait_queue);
++ } else {
++ rc = -EFAULT;
++ }
++ return rc;
++}
++
++static int vtpm_receive(tpmif_t * tpmif, u32 size)
++{
++ int rc = 0;
++ unsigned char buffer[10];
++ __be32 *native_size;
++ struct packet *pak = packet_alloc(tpmif, size, 0, 0);
++
++ if (!pak)
++ return -ENOMEM;
++ /*
++ * Read 10 bytes from the received buffer to test its
++ * content for validity.
++ */
++ if (sizeof (buffer) != packet_read(pak,
++ sizeof (buffer), buffer,
++ sizeof (buffer), 0)) {
++ goto failexit;
++ }
++ /*
++ * Reset the packet read pointer so we can read all its
++ * contents again.
++ */
++ packet_reset(pak);
++
++ native_size = (__force __be32 *) (&buffer[4 + 2]);
++ /*
++ * Verify that the size of the packet is correct
++ * as indicated and that there's actually someone reading packets.
++ * The minimum size of the packet is '10' for tag, size indicator
++ * and ordinal.
++ */
++ if (size < 10 ||
++ be32_to_cpu(*native_size) != size ||
++ 0 == dataex.has_opener || tpmif->status != CONNECTED) {
++ rc = -EINVAL;
++ goto failexit;
++ } else {
++ rc = vtpm_queue_packet(pak);
++ if (rc < 0)
++ goto failexit;
++ }
++ return 0;
++
++ failexit:
++ if (pak) {
++ tpm_send_fail_message(pak, buffer[4 + 1]);
++ packet_free(pak);
++ }
++ return rc;
++}
++
++/*
++ * Timeout function that gets invoked when a packet has not been processed
++ * during the timeout period.
++ * The packet must be on a list when this function is invoked. This
++ * also means that once its taken off a list, the timer must be
++ * destroyed as well.
++ */
++static void processing_timeout(unsigned long ptr)
++{
++ struct packet *pak = (struct packet *)ptr;
++ unsigned long flags;
++
++ write_lock_irqsave(&dataex.pak_lock, flags);
++ /*
++ * The packet needs to be searched whether it
++ * is still on the list.
++ */
++ if (pak == packet_find_packet(&dataex.pending_pak, pak) ||
++ pak == packet_find_packet(&dataex.current_pak, pak)) {
++ if ((pak->flags & PACKET_FLAG_DISCARD_RESPONSE) == 0) {
++ tpm_send_fail_message(pak, pak->req_tag);
++ }
++ /* discard future responses */
++ pak->flags |= PACKET_FLAG_DISCARD_RESPONSE;
++ }
++
++ write_unlock_irqrestore(&dataex.pak_lock, flags);
++}
++
++static void tpm_tx_action(unsigned long unused);
++static DECLARE_TASKLET(tpm_tx_tasklet, tpm_tx_action, 0);
++
++static struct list_head tpm_schedule_list;
++static spinlock_t tpm_schedule_list_lock;
++
++static inline void maybe_schedule_tx_action(void)
++{
++ smp_mb();
++ tasklet_schedule(&tpm_tx_tasklet);
++}
++
++static inline int __on_tpm_schedule_list(tpmif_t * tpmif)
++{
++ return tpmif->list.next != NULL;
++}
++
++static void remove_from_tpm_schedule_list(tpmif_t * tpmif)
++{
++ spin_lock_irq(&tpm_schedule_list_lock);
++ if (likely(__on_tpm_schedule_list(tpmif))) {
++ list_del(&tpmif->list);
++ tpmif->list.next = NULL;
++ tpmif_put(tpmif);
++ }
++ spin_unlock_irq(&tpm_schedule_list_lock);
++}
++
++static void add_to_tpm_schedule_list_tail(tpmif_t * tpmif)
++{
++ if (__on_tpm_schedule_list(tpmif))
++ return;
++
++ spin_lock_irq(&tpm_schedule_list_lock);
++ if (!__on_tpm_schedule_list(tpmif) && tpmif->active) {
++ list_add_tail(&tpmif->list, &tpm_schedule_list);
++ tpmif_get(tpmif);
++ }
++ spin_unlock_irq(&tpm_schedule_list_lock);
++}
++
++void tpmif_schedule_work(tpmif_t * tpmif)
++{
++ add_to_tpm_schedule_list_tail(tpmif);
++ maybe_schedule_tx_action();
++}
++
++void tpmif_deschedule_work(tpmif_t * tpmif)
++{
++ remove_from_tpm_schedule_list(tpmif);
++}
++
++static void tpm_tx_action(unsigned long unused)
++{
++ struct list_head *ent;
++ tpmif_t *tpmif;
++ tpmif_tx_request_t *tx;
++
++ DPRINTK("%s: Getting data from front-end(s)!\n", __FUNCTION__);
++
++ while (!list_empty(&tpm_schedule_list)) {
++ /* Get a tpmif from the list with work to do. */
++ ent = tpm_schedule_list.next;
++ tpmif = list_entry(ent, tpmif_t, list);
++ tpmif_get(tpmif);
++ remove_from_tpm_schedule_list(tpmif);
++
++ tx = &tpmif->tx->ring[0].req;
++
++ /* pass it up */
++ vtpm_receive(tpmif, tx->size);
++
++ tpmif_put(tpmif);
++ }
++}
++
++irqreturn_t tpmif_be_int(int irq, void *dev_id, struct pt_regs *regs)
++{
++ tpmif_t *tpmif = (tpmif_t *) dev_id;
++
++ add_to_tpm_schedule_list_tail(tpmif);
++ maybe_schedule_tx_action();
++ return IRQ_HANDLED;
++}
++
++static int __init tpmback_init(void)
++{
++ int rc;
++
++ if ((rc = misc_register(&vtpms_miscdevice)) != 0) {
++ printk(KERN_ALERT
++ "Could not register misc device for TPM BE.\n");
++ return rc;
++ }
++
++ dataex_init(&dataex);
++
++ spin_lock_init(&tpm_schedule_list_lock);
++ INIT_LIST_HEAD(&tpm_schedule_list);
++
++ tpmif_interface_init();
++ tpmif_xenbus_init();
++
++ printk(KERN_ALERT "Successfully initialized TPM backend driver.\n");
++
++ return 0;
++}
++
++module_init(tpmback_init);
++
++void __exit tpmback_exit(void)
++{
++ vtpm_release_packets(NULL, 0);
++ tpmif_xenbus_exit();
++ tpmif_interface_exit();
++ misc_deregister(&vtpms_miscdevice);
++}
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/tpmback/xenbus.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/tpmback/xenbus.c 2008-03-06 08:54:32.000000000 +0100
+@@ -0,0 +1,289 @@
++/* Xenbus code for tpmif backend
++ Copyright (C) 2005 IBM Corporation
++ Copyright (C) 2005 Rusty Russell <rusty@rustcorp.com.au>
++
++ This program is free software; you can redistribute it and/or modify
++ it under the terms of the GNU General Public License as published by
++ the Free Software Foundation; either version 2 of the License, or
++ (at your option) any later version.
++
++ This program is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ GNU General Public License for more details.
++
++ You should have received a copy of the GNU General Public License
++ along with this program; if not, write to the Free Software
++ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++*/
++#include <stdarg.h>
++#include <linux/module.h>
++#include <xen/xenbus.h>
++#include "common.h"
++
++struct backend_info
++{
++ struct xenbus_device *dev;
++
++ /* our communications channel */
++ tpmif_t *tpmif;
++
++ long int frontend_id;
++ long int instance; // instance of TPM
++ u8 is_instance_set;// whether instance number has been set
++
++ /* watch front end for changes */
++ struct xenbus_watch backend_watch;
++};
++
++static void maybe_connect(struct backend_info *be);
++static void connect(struct backend_info *be);
++static int connect_ring(struct backend_info *be);
++static void backend_changed(struct xenbus_watch *watch,
++ const char **vec, unsigned int len);
++static void frontend_changed(struct xenbus_device *dev,
++ enum xenbus_state frontend_state);
++
++long int tpmback_get_instance(struct backend_info *bi)
++{
++ long int res = -1;
++ if (bi && bi->is_instance_set)
++ res = bi->instance;
++ return res;
++}
++
++static int tpmback_remove(struct xenbus_device *dev)
++{
++ struct backend_info *be = dev->dev.driver_data;
++
++ if (!be) return 0;
++
++ if (be->backend_watch.node) {
++ unregister_xenbus_watch(&be->backend_watch);
++ kfree(be->backend_watch.node);
++ be->backend_watch.node = NULL;
++ }
++ if (be->tpmif) {
++ be->tpmif->bi = NULL;
++ vtpm_release_packets(be->tpmif, 0);
++ tpmif_put(be->tpmif);
++ be->tpmif = NULL;
++ }
++ kfree(be);
++ dev->dev.driver_data = NULL;
++ return 0;
++}
++
++static int tpmback_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int err;
++ struct backend_info *be = kzalloc(sizeof(struct backend_info),
++ GFP_KERNEL);
++
++ if (!be) {
++ xenbus_dev_fatal(dev, -ENOMEM,
++ "allocating backend structure");
++ return -ENOMEM;
++ }
++
++ be->is_instance_set = 0;
++ be->dev = dev;
++ dev->dev.driver_data = be;
++
++ err = xenbus_watch_path2(dev, dev->nodename,
++ "instance", &be->backend_watch,
++ backend_changed);
++ if (err) {
++ goto fail;
++ }
++
++ err = xenbus_switch_state(dev, XenbusStateInitWait);
++ if (err) {
++ goto fail;
++ }
++ return 0;
++fail:
++ tpmback_remove(dev);
++ return err;
++}
++
++
++static void backend_changed(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ int err;
++ long instance;
++ struct backend_info *be
++ = container_of(watch, struct backend_info, backend_watch);
++ struct xenbus_device *dev = be->dev;
++
++ err = xenbus_scanf(XBT_NIL, dev->nodename,
++ "instance","%li", &instance);
++ if (XENBUS_EXIST_ERR(err)) {
++ return;
++ }
++
++ if (err != 1) {
++ xenbus_dev_fatal(dev, err, "reading instance");
++ return;
++ }
++
++ if (be->is_instance_set == 0) {
++ be->instance = instance;
++ be->is_instance_set = 1;
++ }
++}
++
++
++static void frontend_changed(struct xenbus_device *dev,
++ enum xenbus_state frontend_state)
++{
++ struct backend_info *be = dev->dev.driver_data;
++ int err;
++
++ switch (frontend_state) {
++ case XenbusStateInitialising:
++ case XenbusStateInitialised:
++ break;
++
++ case XenbusStateConnected:
++ err = connect_ring(be);
++ if (err) {
++ return;
++ }
++ maybe_connect(be);
++ break;
++
++ case XenbusStateClosing:
++ be->instance = -1;
++ xenbus_switch_state(dev, XenbusStateClosing);
++ break;
++
++ case XenbusStateUnknown: /* keep it here */
++ case XenbusStateClosed:
++ xenbus_switch_state(dev, XenbusStateClosed);
++ device_unregister(&be->dev->dev);
++ tpmback_remove(dev);
++ break;
++
++ default:
++ xenbus_dev_fatal(dev, -EINVAL,
++ "saw state %d at frontend",
++ frontend_state);
++ break;
++ }
++}
++
++
++
++static void maybe_connect(struct backend_info *be)
++{
++ if (be->tpmif == NULL || be->tpmif->status == CONNECTED)
++ return;
++
++ connect(be);
++}
++
++
++static void connect(struct backend_info *be)
++{
++ struct xenbus_transaction xbt;
++ int err;
++ struct xenbus_device *dev = be->dev;
++ unsigned long ready = 1;
++
++again:
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(be->dev, err, "starting transaction");
++ return;
++ }
++
++ err = xenbus_printf(xbt, be->dev->nodename,
++ "ready", "%lu", ready);
++ if (err) {
++ xenbus_dev_fatal(be->dev, err, "writing 'ready'");
++ goto abort;
++ }
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err == -EAGAIN)
++ goto again;
++ if (err)
++ xenbus_dev_fatal(be->dev, err, "end of transaction");
++
++ err = xenbus_switch_state(dev, XenbusStateConnected);
++ if (!err)
++ be->tpmif->status = CONNECTED;
++ return;
++abort:
++ xenbus_transaction_end(xbt, 1);
++}
++
++
++static int connect_ring(struct backend_info *be)
++{
++ struct xenbus_device *dev = be->dev;
++ unsigned long ring_ref;
++ unsigned int evtchn;
++ int err;
++
++ err = xenbus_gather(XBT_NIL, dev->otherend,
++ "ring-ref", "%lu", &ring_ref,
++ "event-channel", "%u", &evtchn, NULL);
++ if (err) {
++ xenbus_dev_error(dev, err,
++ "reading %s/ring-ref and event-channel",
++ dev->otherend);
++ return err;
++ }
++
++ if (!be->tpmif) {
++ be->tpmif = tpmif_find(dev->otherend_id, be);
++ if (IS_ERR(be->tpmif)) {
++ err = PTR_ERR(be->tpmif);
++ be->tpmif = NULL;
++ xenbus_dev_fatal(dev,err,"creating vtpm interface");
++ return err;
++ }
++ }
++
++ if (be->tpmif != NULL) {
++ err = tpmif_map(be->tpmif, ring_ref, evtchn);
++ if (err) {
++ xenbus_dev_error(dev, err,
++ "mapping shared-frame %lu port %u",
++ ring_ref, evtchn);
++ return err;
++ }
++ }
++ return 0;
++}
++
++
++static const struct xenbus_device_id tpmback_ids[] = {
++ { "vtpm" },
++ { "" }
++};
++
++
++static struct xenbus_driver tpmback = {
++ .name = "vtpm",
++ .owner = THIS_MODULE,
++ .ids = tpmback_ids,
++ .probe = tpmback_probe,
++ .remove = tpmback_remove,
++ .otherend_changed = frontend_changed,
++};
++
++
++void tpmif_xenbus_init(void)
++{
++ xenbus_register_backend(&tpmback);
++}
++
++void tpmif_xenbus_exit(void)
++{
++ xenbus_unregister_driver(&tpmback);
++}
+Index: head-2008-11-25/drivers/xen/util.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/util.c 2007-07-10 09:42:30.000000000 +0200
+@@ -0,0 +1,65 @@
++#include <linux/mm.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/vmalloc.h>
++#include <asm/uaccess.h>
++#include <xen/driver_util.h>
++
++struct class *get_xen_class(void)
++{
++ static struct class *xen_class;
++
++ if (xen_class)
++ return xen_class;
++
++ xen_class = class_create(THIS_MODULE, "xen");
++ if (IS_ERR(xen_class)) {
++ printk("Failed to create xen sysfs class.\n");
++ xen_class = NULL;
++ }
++
++ return xen_class;
++}
++EXPORT_SYMBOL_GPL(get_xen_class);
++
++#ifdef CONFIG_X86
++static int f(pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
++{
++ /* apply_to_page_range() does all the hard work. */
++ return 0;
++}
++
++struct vm_struct *alloc_vm_area(unsigned long size)
++{
++ struct vm_struct *area;
++
++ area = get_vm_area(size, VM_IOREMAP);
++ if (area == NULL)
++ return NULL;
++
++ /*
++ * This ensures that page tables are constructed for this region
++ * of kernel virtual address space and mapped into init_mm.
++ */
++ if (apply_to_page_range(&init_mm, (unsigned long)area->addr,
++ area->size, f, NULL)) {
++ free_vm_area(area);
++ return NULL;
++ }
++
++ /* Map page directories into every address space. */
++ vmalloc_sync_all();
++
++ return area;
++}
++EXPORT_SYMBOL_GPL(alloc_vm_area);
++
++void free_vm_area(struct vm_struct *area)
++{
++ struct vm_struct *ret;
++ ret = remove_vm_area(area->addr);
++ BUG_ON(ret != area);
++ kfree(area);
++}
++EXPORT_SYMBOL_GPL(free_vm_area);
++#endif /* CONFIG_X86 */
+Index: head-2008-11-25/drivers/xen/xenbus/xenbus_backend_client.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/xenbus/xenbus_backend_client.c 2007-06-12 13:13:45.000000000 +0200
+@@ -0,0 +1,147 @@
++/******************************************************************************
++ * Backend-client-facing interface for the Xenbus driver. In other words, the
++ * interface between the Xenbus and the device-specific code in the backend
++ * driver.
++ *
++ * Copyright (C) 2005-2006 XenSource Ltd
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/err.h>
++#include <xen/gnttab.h>
++#include <xen/xenbus.h>
++#include <xen/driver_util.h>
++
++/* Based on Rusty Russell's skeleton driver's map_page */
++struct vm_struct *xenbus_map_ring_valloc(struct xenbus_device *dev, int gnt_ref)
++{
++ struct gnttab_map_grant_ref op;
++ struct vm_struct *area;
++
++ area = alloc_vm_area(PAGE_SIZE);
++ if (!area)
++ return ERR_PTR(-ENOMEM);
++
++ gnttab_set_map_op(&op, (unsigned long)area->addr, GNTMAP_host_map,
++ gnt_ref, dev->otherend_id);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status != GNTST_okay) {
++ free_vm_area(area);
++ xenbus_dev_fatal(dev, op.status,
++ "mapping in shared page %d from domain %d",
++ gnt_ref, dev->otherend_id);
++ BUG_ON(!IS_ERR(ERR_PTR(op.status)));
++ return ERR_PTR(op.status);
++ }
++
++ /* Stuff the handle in an unused field */
++ area->phys_addr = (unsigned long)op.handle;
++
++ return area;
++}
++EXPORT_SYMBOL_GPL(xenbus_map_ring_valloc);
++
++
++int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref,
++ grant_handle_t *handle, void *vaddr)
++{
++ struct gnttab_map_grant_ref op;
++
++ gnttab_set_map_op(&op, (unsigned long)vaddr, GNTMAP_host_map,
++ gnt_ref, dev->otherend_id);
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status != GNTST_okay) {
++ xenbus_dev_fatal(dev, op.status,
++ "mapping in shared page %d from domain %d",
++ gnt_ref, dev->otherend_id);
++ } else
++ *handle = op.handle;
++
++ return op.status;
++}
++EXPORT_SYMBOL_GPL(xenbus_map_ring);
++
++
++/* Based on Rusty Russell's skeleton driver's unmap_page */
++int xenbus_unmap_ring_vfree(struct xenbus_device *dev, struct vm_struct *area)
++{
++ struct gnttab_unmap_grant_ref op;
++
++ gnttab_set_unmap_op(&op, (unsigned long)area->addr, GNTMAP_host_map,
++ (grant_handle_t)area->phys_addr);
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status == GNTST_okay)
++ free_vm_area(area);
++ else
++ xenbus_dev_error(dev, op.status,
++ "unmapping page at handle %d error %d",
++ (int16_t)area->phys_addr, op.status);
++
++ return op.status;
++}
++EXPORT_SYMBOL_GPL(xenbus_unmap_ring_vfree);
++
++
++int xenbus_unmap_ring(struct xenbus_device *dev,
++ grant_handle_t handle, void *vaddr)
++{
++ struct gnttab_unmap_grant_ref op;
++
++ gnttab_set_unmap_op(&op, (unsigned long)vaddr, GNTMAP_host_map,
++ handle);
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status != GNTST_okay)
++ xenbus_dev_error(dev, op.status,
++ "unmapping page at handle %d error %d",
++ handle, op.status);
++
++ return op.status;
++}
++EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
++
++int xenbus_dev_is_online(struct xenbus_device *dev)
++{
++ int rc, val;
++
++ rc = xenbus_scanf(XBT_NIL, dev->nodename, "online", "%d", &val);
++ if (rc != 1)
++ val = 0; /* no online node present */
++
++ return val;
++}
++EXPORT_SYMBOL_GPL(xenbus_dev_is_online);
++
++MODULE_LICENSE("Dual BSD/GPL");
+Index: head-2008-11-25/drivers/xen/xenbus/xenbus_dev.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/xenbus/xenbus_dev.c 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,408 @@
++/*
++ * xenbus_dev.c
++ *
++ * Driver giving user-space access to the kernel's xenbus connection
++ * to xenstore.
++ *
++ * Copyright (c) 2005, Christian Limpach
++ * Copyright (c) 2005, Rusty Russell, IBM Corporation
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/uio.h>
++#include <linux/notifier.h>
++#include <linux/wait.h>
++#include <linux/fs.h>
++#include <linux/poll.h>
++#include <linux/mutex.h>
++
++#include "xenbus_comms.h"
++
++#include <asm/uaccess.h>
++#include <asm/hypervisor.h>
++#include <xen/xenbus.h>
++#include <xen/xen_proc.h>
++#include <asm/hypervisor.h>
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++struct xenbus_dev_transaction {
++ struct list_head list;
++ struct xenbus_transaction handle;
++};
++
++struct read_buffer {
++ struct list_head list;
++ unsigned int cons;
++ unsigned int len;
++ char msg[];
++};
++
++struct xenbus_dev_data {
++ /* In-progress transaction. */
++ struct list_head transactions;
++
++ /* Active watches. */
++ struct list_head watches;
++
++ /* Partial request. */
++ unsigned int len;
++ union {
++ struct xsd_sockmsg msg;
++ char buffer[PAGE_SIZE];
++ } u;
++
++ /* Response queue. */
++ struct list_head read_buffers;
++ wait_queue_head_t read_waitq;
++
++ struct mutex reply_mutex;
++};
++
++static struct proc_dir_entry *xenbus_dev_intf;
++
++static ssize_t xenbus_dev_read(struct file *filp,
++ char __user *ubuf,
++ size_t len, loff_t *ppos)
++{
++ struct xenbus_dev_data *u = filp->private_data;
++ struct read_buffer *rb;
++ int i, ret;
++
++ mutex_lock(&u->reply_mutex);
++ while (list_empty(&u->read_buffers)) {
++ mutex_unlock(&u->reply_mutex);
++ ret = wait_event_interruptible(u->read_waitq,
++ !list_empty(&u->read_buffers));
++ if (ret)
++ return ret;
++ mutex_lock(&u->reply_mutex);
++ }
++
++ rb = list_entry(u->read_buffers.next, struct read_buffer, list);
++ for (i = 0; i < len;) {
++ put_user(rb->msg[rb->cons], ubuf + i);
++ i++;
++ rb->cons++;
++ if (rb->cons == rb->len) {
++ list_del(&rb->list);
++ kfree(rb);
++ if (list_empty(&u->read_buffers))
++ break;
++ rb = list_entry(u->read_buffers.next,
++ struct read_buffer, list);
++ }
++ }
++ mutex_unlock(&u->reply_mutex);
++
++ return i;
++}
++
++static void queue_reply(struct xenbus_dev_data *u,
++ char *data, unsigned int len)
++{
++ struct read_buffer *rb;
++
++ if (len == 0)
++ return;
++
++ rb = kmalloc(sizeof(*rb) + len, GFP_KERNEL);
++ BUG_ON(rb == NULL);
++
++ rb->cons = 0;
++ rb->len = len;
++
++ memcpy(rb->msg, data, len);
++
++ list_add_tail(&rb->list, &u->read_buffers);
++
++ wake_up(&u->read_waitq);
++}
++
++struct watch_adapter
++{
++ struct list_head list;
++ struct xenbus_watch watch;
++ struct xenbus_dev_data *dev_data;
++ char *token;
++};
++
++static void free_watch_adapter (struct watch_adapter *watch)
++{
++ kfree(watch->watch.node);
++ kfree(watch->token);
++ kfree(watch);
++}
++
++static void watch_fired(struct xenbus_watch *watch,
++ const char **vec,
++ unsigned int len)
++{
++ struct watch_adapter *adap =
++ container_of(watch, struct watch_adapter, watch);
++ struct xsd_sockmsg hdr;
++ const char *path, *token;
++ int path_len, tok_len, body_len, data_len = 0;
++
++ path = vec[XS_WATCH_PATH];
++ token = adap->token;
++
++ path_len = strlen(path) + 1;
++ tok_len = strlen(token) + 1;
++ if (len > 2)
++ data_len = vec[len] - vec[2] + 1;
++ body_len = path_len + tok_len + data_len;
++
++ hdr.type = XS_WATCH_EVENT;
++ hdr.len = body_len;
++
++ mutex_lock(&adap->dev_data->reply_mutex);
++ queue_reply(adap->dev_data, (char *)&hdr, sizeof(hdr));
++ queue_reply(adap->dev_data, (char *)path, path_len);
++ queue_reply(adap->dev_data, (char *)token, tok_len);
++ if (len > 2)
++ queue_reply(adap->dev_data, (char *)vec[2], data_len);
++ mutex_unlock(&adap->dev_data->reply_mutex);
++}
++
++static LIST_HEAD(watch_list);
++
++static ssize_t xenbus_dev_write(struct file *filp,
++ const char __user *ubuf,
++ size_t len, loff_t *ppos)
++{
++ struct xenbus_dev_data *u = filp->private_data;
++ struct xenbus_dev_transaction *trans = NULL;
++ uint32_t msg_type;
++ void *reply;
++ char *path, *token;
++ struct watch_adapter *watch, *tmp_watch;
++ int err, rc = len;
++
++ if ((len + u->len) > sizeof(u->u.buffer)) {
++ rc = -EINVAL;
++ goto out;
++ }
++
++ if (copy_from_user(u->u.buffer + u->len, ubuf, len) != 0) {
++ rc = -EFAULT;
++ goto out;
++ }
++
++ u->len += len;
++ if ((u->len < sizeof(u->u.msg)) ||
++ (u->len < (sizeof(u->u.msg) + u->u.msg.len)))
++ return rc;
++
++ msg_type = u->u.msg.type;
++
++ switch (msg_type) {
++ case XS_TRANSACTION_START:
++ case XS_TRANSACTION_END:
++ case XS_DIRECTORY:
++ case XS_READ:
++ case XS_GET_PERMS:
++ case XS_RELEASE:
++ case XS_GET_DOMAIN_PATH:
++ case XS_WRITE:
++ case XS_MKDIR:
++ case XS_RM:
++ case XS_SET_PERMS:
++ if (msg_type == XS_TRANSACTION_START) {
++ trans = kmalloc(sizeof(*trans), GFP_KERNEL);
++ if (!trans) {
++ rc = -ENOMEM;
++ goto out;
++ }
++ }
++
++ reply = xenbus_dev_request_and_reply(&u->u.msg);
++ if (IS_ERR(reply)) {
++ kfree(trans);
++ rc = PTR_ERR(reply);
++ goto out;
++ }
++
++ if (msg_type == XS_TRANSACTION_START) {
++ trans->handle.id = simple_strtoul(reply, NULL, 0);
++ list_add(&trans->list, &u->transactions);
++ } else if (msg_type == XS_TRANSACTION_END) {
++ list_for_each_entry(trans, &u->transactions, list)
++ if (trans->handle.id == u->u.msg.tx_id)
++ break;
++ BUG_ON(&trans->list == &u->transactions);
++ list_del(&trans->list);
++ kfree(trans);
++ }
++ mutex_lock(&u->reply_mutex);
++ queue_reply(u, (char *)&u->u.msg, sizeof(u->u.msg));
++ queue_reply(u, (char *)reply, u->u.msg.len);
++ mutex_unlock(&u->reply_mutex);
++ kfree(reply);
++ break;
++
++ case XS_WATCH:
++ case XS_UNWATCH: {
++ static const char *XS_RESP = "OK";
++ struct xsd_sockmsg hdr;
++
++ path = u->u.buffer + sizeof(u->u.msg);
++ token = memchr(path, 0, u->u.msg.len);
++ if (token == NULL) {
++ rc = -EILSEQ;
++ goto out;
++ }
++ token++;
++
++ if (msg_type == XS_WATCH) {
++ watch = kzalloc(sizeof(*watch), GFP_KERNEL);
++ watch->watch.node = kmalloc(strlen(path)+1,
++ GFP_KERNEL);
++ strcpy((char *)watch->watch.node, path);
++ watch->watch.callback = watch_fired;
++ watch->token = kmalloc(strlen(token)+1, GFP_KERNEL);
++ strcpy(watch->token, token);
++ watch->dev_data = u;
++
++ err = register_xenbus_watch(&watch->watch);
++ if (err) {
++ free_watch_adapter(watch);
++ rc = err;
++ goto out;
++ }
++
++ list_add(&watch->list, &u->watches);
++ } else {
++ list_for_each_entry_safe(watch, tmp_watch,
++ &u->watches, list) {
++ if (!strcmp(watch->token, token) &&
++ !strcmp(watch->watch.node, path))
++ {
++ unregister_xenbus_watch(&watch->watch);
++ list_del(&watch->list);
++ free_watch_adapter(watch);
++ break;
++ }
++ }
++ }
++
++ hdr.type = msg_type;
++ hdr.len = strlen(XS_RESP) + 1;
++ mutex_lock(&u->reply_mutex);
++ queue_reply(u, (char *)&hdr, sizeof(hdr));
++ queue_reply(u, (char *)XS_RESP, hdr.len);
++ mutex_unlock(&u->reply_mutex);
++ break;
++ }
++
++ default:
++ rc = -EINVAL;
++ break;
++ }
++
++ out:
++ u->len = 0;
++ return rc;
++}
++
++static int xenbus_dev_open(struct inode *inode, struct file *filp)
++{
++ struct xenbus_dev_data *u;
++
++ if (xen_store_evtchn == 0)
++ return -ENOENT;
++
++ nonseekable_open(inode, filp);
++
++ u = kzalloc(sizeof(*u), GFP_KERNEL);
++ if (u == NULL)
++ return -ENOMEM;
++
++ INIT_LIST_HEAD(&u->transactions);
++ INIT_LIST_HEAD(&u->watches);
++ INIT_LIST_HEAD(&u->read_buffers);
++ init_waitqueue_head(&u->read_waitq);
++
++ mutex_init(&u->reply_mutex);
++
++ filp->private_data = u;
++
++ return 0;
++}
++
++static int xenbus_dev_release(struct inode *inode, struct file *filp)
++{
++ struct xenbus_dev_data *u = filp->private_data;
++ struct xenbus_dev_transaction *trans, *tmp;
++ struct watch_adapter *watch, *tmp_watch;
++
++ list_for_each_entry_safe(trans, tmp, &u->transactions, list) {
++ xenbus_transaction_end(trans->handle, 1);
++ list_del(&trans->list);
++ kfree(trans);
++ }
++
++ list_for_each_entry_safe(watch, tmp_watch, &u->watches, list) {
++ unregister_xenbus_watch(&watch->watch);
++ list_del(&watch->list);
++ free_watch_adapter(watch);
++ }
++
++ kfree(u);
++
++ return 0;
++}
++
++static unsigned int xenbus_dev_poll(struct file *file, poll_table *wait)
++{
++ struct xenbus_dev_data *u = file->private_data;
++
++ poll_wait(file, &u->read_waitq, wait);
++ if (!list_empty(&u->read_buffers))
++ return POLLIN | POLLRDNORM;
++ return 0;
++}
++
++static const struct file_operations xenbus_dev_file_ops = {
++ .read = xenbus_dev_read,
++ .write = xenbus_dev_write,
++ .open = xenbus_dev_open,
++ .release = xenbus_dev_release,
++ .poll = xenbus_dev_poll,
++};
++
++int xenbus_dev_init(void)
++{
++ xenbus_dev_intf = create_xen_proc_entry("xenbus", 0400);
++ if (xenbus_dev_intf)
++ xenbus_dev_intf->proc_fops = &xenbus_dev_file_ops;
++
++ return 0;
++}
+Index: head-2008-11-25/drivers/xen/xenbus/xenbus_probe_backend.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/xenbus/xenbus_probe_backend.c 2008-01-21 11:15:26.000000000 +0100
+@@ -0,0 +1,292 @@
++/******************************************************************************
++ * Talks to Xen Store to figure out what devices we have (backend half).
++ *
++ * Copyright (C) 2005 Rusty Russell, IBM Corporation
++ * Copyright (C) 2005 Mike Wray, Hewlett-Packard
++ * Copyright (C) 2005, 2006 XenSource Ltd
++ * Copyright (C) 2007 Solarflare Communications, Inc.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#define DPRINTK(fmt, args...) \
++ pr_debug("xenbus_probe (%s:%d) " fmt ".\n", \
++ __FUNCTION__, __LINE__, ##args)
++
++#include <linux/kernel.h>
++#include <linux/err.h>
++#include <linux/string.h>
++#include <linux/ctype.h>
++#include <linux/fcntl.h>
++#include <linux/mm.h>
++#include <linux/notifier.h>
++
++#include <asm/io.h>
++#include <asm/page.h>
++#include <asm/maddr.h>
++#include <asm/pgtable.h>
++#include <asm/hypervisor.h>
++#include <xen/xenbus.h>
++#include <xen/xen_proc.h>
++#include <xen/evtchn.h>
++#include <xen/features.h>
++
++#include "xenbus_comms.h"
++#include "xenbus_probe.h"
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++static int xenbus_uevent_backend(struct device *dev, char **envp,
++ int num_envp, char *buffer, int buffer_size);
++static int xenbus_probe_backend(const char *type, const char *domid);
++
++extern int read_otherend_details(struct xenbus_device *xendev,
++ char *id_node, char *path_node);
++
++static int read_frontend_details(struct xenbus_device *xendev)
++{
++ return read_otherend_details(xendev, "frontend-id", "frontend");
++}
++
++/* backend/<type>/<fe-uuid>/<id> => <type>-<fe-domid>-<id> */
++static int backend_bus_id(char bus_id[BUS_ID_SIZE], const char *nodename)
++{
++ int domid, err;
++ const char *devid, *type, *frontend;
++ unsigned int typelen;
++
++ type = strchr(nodename, '/');
++ if (!type)
++ return -EINVAL;
++ type++;
++ typelen = strcspn(type, "/");
++ if (!typelen || type[typelen] != '/')
++ return -EINVAL;
++
++ devid = strrchr(nodename, '/') + 1;
++
++ err = xenbus_gather(XBT_NIL, nodename, "frontend-id", "%i", &domid,
++ "frontend", NULL, &frontend,
++ NULL);
++ if (err)
++ return err;
++ if (strlen(frontend) == 0)
++ err = -ERANGE;
++ if (!err && !xenbus_exists(XBT_NIL, frontend, ""))
++ err = -ENOENT;
++ kfree(frontend);
++
++ if (err)
++ return err;
++
++ if (snprintf(bus_id, BUS_ID_SIZE,
++ "%.*s-%i-%s", typelen, type, domid, devid) >= BUS_ID_SIZE)
++ return -ENOSPC;
++ return 0;
++}
++
++static struct xen_bus_type xenbus_backend = {
++ .root = "backend",
++ .levels = 3, /* backend/type/<frontend>/<id> */
++ .get_bus_id = backend_bus_id,
++ .probe = xenbus_probe_backend,
++ .error = -ENODEV,
++ .bus = {
++ .name = "xen-backend",
++ .match = xenbus_match,
++ .probe = xenbus_dev_probe,
++ .remove = xenbus_dev_remove,
++// .shutdown = xenbus_dev_shutdown,
++ .uevent = xenbus_uevent_backend,
++ },
++ .dev = {
++ .bus_id = "xen-backend",
++ },
++};
++
++static int xenbus_uevent_backend(struct device *dev, char **envp,
++ int num_envp, char *buffer, int buffer_size)
++{
++ struct xenbus_device *xdev;
++ struct xenbus_driver *drv;
++ int i = 0;
++ int length = 0;
++
++ DPRINTK("");
++
++ if (dev == NULL)
++ return -ENODEV;
++
++ xdev = to_xenbus_device(dev);
++ if (xdev == NULL)
++ return -ENODEV;
++
++ /* stuff we want to pass to /sbin/hotplug */
++ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++ "XENBUS_TYPE=%s", xdev->devicetype);
++
++ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++ "XENBUS_PATH=%s", xdev->nodename);
++
++ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++ "XENBUS_BASE_PATH=%s", xenbus_backend.root);
++
++ /* terminate, set to next free slot, shrink available space */
++ envp[i] = NULL;
++ envp = &envp[i];
++ num_envp -= i;
++ buffer = &buffer[length];
++ buffer_size -= length;
++
++ if (dev->driver) {
++ drv = to_xenbus_driver(dev->driver);
++ if (drv && drv->uevent)
++ return drv->uevent(xdev, envp, num_envp, buffer,
++ buffer_size);
++ }
++
++ return 0;
++}
++
++int xenbus_register_backend(struct xenbus_driver *drv)
++{
++ drv->read_otherend_details = read_frontend_details;
++
++ return xenbus_register_driver_common(drv, &xenbus_backend);
++}
++EXPORT_SYMBOL_GPL(xenbus_register_backend);
++
++/* backend/<typename>/<frontend-uuid>/<name> */
++static int xenbus_probe_backend_unit(const char *dir,
++ const char *type,
++ const char *name)
++{
++ char *nodename;
++ int err;
++
++ nodename = kasprintf(GFP_KERNEL, "%s/%s", dir, name);
++ if (!nodename)
++ return -ENOMEM;
++
++ DPRINTK("%s\n", nodename);
++
++ err = xenbus_probe_node(&xenbus_backend, type, nodename);
++ kfree(nodename);
++ return err;
++}
++
++/* backend/<typename>/<frontend-domid> */
++static int xenbus_probe_backend(const char *type, const char *domid)
++{
++ char *nodename;
++ int err = 0;
++ char **dir;
++ unsigned int i, dir_n = 0;
++
++ DPRINTK("");
++
++ nodename = kasprintf(GFP_KERNEL, "%s/%s/%s", xenbus_backend.root, type, domid);
++ if (!nodename)
++ return -ENOMEM;
++
++ dir = xenbus_directory(XBT_NIL, nodename, "", &dir_n);
++ if (IS_ERR(dir)) {
++ kfree(nodename);
++ return PTR_ERR(dir);
++ }
++
++ for (i = 0; i < dir_n; i++) {
++ err = xenbus_probe_backend_unit(nodename, type, dir[i]);
++ if (err)
++ break;
++ }
++ kfree(dir);
++ kfree(nodename);
++ return err;
++}
++
++static void backend_changed(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ DPRINTK("");
++
++ dev_changed(vec[XS_WATCH_PATH], &xenbus_backend);
++}
++
++static struct xenbus_watch be_watch = {
++ .node = "backend",
++ .callback = backend_changed,
++};
++
++void xenbus_backend_suspend(int (*fn)(struct device *, void *))
++{
++ DPRINTK("");
++ if (!xenbus_backend.error)
++ bus_for_each_dev(&xenbus_backend.bus, NULL, NULL, fn);
++}
++
++void xenbus_backend_resume(int (*fn)(struct device *, void *))
++{
++ DPRINTK("");
++ if (!xenbus_backend.error)
++ bus_for_each_dev(&xenbus_backend.bus, NULL, NULL, fn);
++}
++
++void xenbus_backend_probe_and_watch(void)
++{
++ xenbus_probe_devices(&xenbus_backend);
++ register_xenbus_watch(&be_watch);
++}
++
++void xenbus_backend_bus_register(void)
++{
++ xenbus_backend.error = bus_register(&xenbus_backend.bus);
++ if (xenbus_backend.error)
++ printk(KERN_WARNING
++ "XENBUS: Error registering backend bus: %i\n",
++ xenbus_backend.error);
++}
++
++void xenbus_backend_device_register(void)
++{
++ if (xenbus_backend.error)
++ return;
++
++ xenbus_backend.error = device_register(&xenbus_backend.dev);
++ if (xenbus_backend.error) {
++ bus_unregister(&xenbus_backend.bus);
++ printk(KERN_WARNING
++ "XENBUS: Error registering backend device: %i\n",
++ xenbus_backend.error);
++ }
++}
++
++int xenbus_for_each_backend(void *arg, int (*fn)(struct device *, void *))
++{
++ return bus_for_each_dev(&xenbus_backend.bus, NULL, arg, fn);
++}
++EXPORT_SYMBOL_GPL(xenbus_for_each_backend);
+Index: head-2008-11-25/drivers/xen/xenoprof/xenoprofile.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/drivers/xen/xenoprof/xenoprofile.c 2008-09-15 13:40:15.000000000 +0200
+@@ -0,0 +1,545 @@
++/**
++ * @file xenoprofile.c
++ *
++ * @remark Copyright 2002 OProfile authors
++ * @remark Read the file COPYING
++ *
++ * @author John Levon <levon@movementarian.org>
++ *
++ * Modified by Aravind Menon and Jose Renato Santos for Xen
++ * These modifications are:
++ * Copyright (C) 2005 Hewlett-Packard Co.
++ *
++ * Separated out arch-generic part
++ * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
++ * VA Linux Systems Japan K.K.
++ */
++
++#include <linux/init.h>
++#include <linux/notifier.h>
++#include <linux/smp.h>
++#include <linux/oprofile.h>
++#include <linux/sysdev.h>
++#include <linux/slab.h>
++#include <linux/interrupt.h>
++#include <linux/vmalloc.h>
++#include <asm/pgtable.h>
++#include <xen/evtchn.h>
++#include <xen/xenoprof.h>
++#include <xen/driver_util.h>
++#include <xen/interface/xen.h>
++#include <xen/interface/xenoprof.h>
++#include "../../../drivers/oprofile/cpu_buffer.h"
++#include "../../../drivers/oprofile/event_buffer.h"
++
++#define MAX_XENOPROF_SAMPLES 16
++
++/* sample buffers shared with Xen */
++static xenoprof_buf_t *xenoprof_buf[MAX_VIRT_CPUS];
++/* Shared buffer area */
++static struct xenoprof_shared_buffer shared_buffer;
++
++/* Passive sample buffers shared with Xen */
++static xenoprof_buf_t *p_xenoprof_buf[MAX_OPROF_DOMAINS][MAX_VIRT_CPUS];
++/* Passive shared buffer area */
++static struct xenoprof_shared_buffer p_shared_buffer[MAX_OPROF_DOMAINS];
++
++static int xenoprof_start(void);
++static void xenoprof_stop(void);
++
++static int xenoprof_enabled = 0;
++static int xenoprof_is_primary = 0;
++static int active_defined;
++
++extern unsigned long backtrace_depth;
++
++/* Number of buffers in shared area (one per VCPU) */
++static int nbuf;
++/* Mappings of VIRQ_XENOPROF to irq number (per cpu) */
++static int ovf_irq[NR_CPUS];
++/* cpu model type string - copied from Xen on XENOPROF_init command */
++static char cpu_type[XENOPROF_CPU_TYPE_SIZE];
++
++#ifdef CONFIG_PM
++
++static int xenoprof_suspend(struct sys_device * dev, pm_message_t state)
++{
++ if (xenoprof_enabled == 1)
++ xenoprof_stop();
++ return 0;
++}
++
++
++static int xenoprof_resume(struct sys_device * dev)
++{
++ if (xenoprof_enabled == 1)
++ xenoprof_start();
++ return 0;
++}
++
++
++static struct sysdev_class oprofile_sysclass = {
++ set_kset_name("oprofile"),
++ .resume = xenoprof_resume,
++ .suspend = xenoprof_suspend
++};
++
++
++static struct sys_device device_oprofile = {
++ .id = 0,
++ .cls = &oprofile_sysclass,
++};
++
++
++static int __init init_driverfs(void)
++{
++ int error;
++ if (!(error = sysdev_class_register(&oprofile_sysclass)))
++ error = sysdev_register(&device_oprofile);
++ return error;
++}
++
++
++static void exit_driverfs(void)
++{
++ sysdev_unregister(&device_oprofile);
++ sysdev_class_unregister(&oprofile_sysclass);
++}
++
++#else
++#define init_driverfs() do { } while (0)
++#define exit_driverfs() do { } while (0)
++#endif /* CONFIG_PM */
++
++static unsigned long long oprofile_samples;
++static unsigned long long p_oprofile_samples;
++
++static unsigned int pdomains;
++static struct xenoprof_passive passive_domains[MAX_OPROF_DOMAINS];
++
++/* Check whether the given entry is an escape code */
++static int xenoprof_is_escape(xenoprof_buf_t * buf, int tail)
++{
++ return (buf->event_log[tail].eip == XENOPROF_ESCAPE_CODE);
++}
++
++/* Get the event at the given entry */
++static uint8_t xenoprof_get_event(xenoprof_buf_t * buf, int tail)
++{
++ return (buf->event_log[tail].event);
++}
++
++static void xenoprof_add_pc(xenoprof_buf_t *buf, int is_passive)
++{
++ int head, tail, size;
++ int tracing = 0;
++
++ head = buf->event_head;
++ tail = buf->event_tail;
++ size = buf->event_size;
++
++ while (tail != head) {
++ if (xenoprof_is_escape(buf, tail) &&
++ xenoprof_get_event(buf, tail) == XENOPROF_TRACE_BEGIN) {
++ tracing=1;
++ oprofile_add_pc(ESCAPE_CODE, buf->event_log[tail].mode,
++ CPU_TRACE_BEGIN);
++ if (!is_passive)
++ oprofile_samples++;
++ else
++ p_oprofile_samples++;
++
++ } else {
++ oprofile_add_pc(buf->event_log[tail].eip,
++ buf->event_log[tail].mode,
++ buf->event_log[tail].event);
++ if (!tracing) {
++ if (!is_passive)
++ oprofile_samples++;
++ else
++ p_oprofile_samples++;
++ }
++
++ }
++ tail++;
++ if(tail==size)
++ tail=0;
++ }
++ buf->event_tail = tail;
++}
++
++static void xenoprof_handle_passive(void)
++{
++ int i, j;
++ int flag_domain, flag_switch = 0;
++
++ for (i = 0; i < pdomains; i++) {
++ flag_domain = 0;
++ for (j = 0; j < passive_domains[i].nbuf; j++) {
++ xenoprof_buf_t *buf = p_xenoprof_buf[i][j];
++ if (buf->event_head == buf->event_tail)
++ continue;
++ if (!flag_domain) {
++ if (!oprofile_add_domain_switch(
++ passive_domains[i].domain_id))
++ goto done;
++ flag_domain = 1;
++ }
++ xenoprof_add_pc(buf, 1);
++ flag_switch = 1;
++ }
++ }
++done:
++ if (flag_switch)
++ oprofile_add_domain_switch(COORDINATOR_DOMAIN);
++}
++
++static irqreturn_t
++xenoprof_ovf_interrupt(int irq, void * dev_id, struct pt_regs * regs)
++{
++ struct xenoprof_buf * buf;
++ static unsigned long flag;
++
++ buf = xenoprof_buf[smp_processor_id()];
++
++ xenoprof_add_pc(buf, 0);
++
++ if (xenoprof_is_primary && !test_and_set_bit(0, &flag)) {
++ xenoprof_handle_passive();
++ smp_mb__before_clear_bit();
++ clear_bit(0, &flag);
++ }
++
++ return IRQ_HANDLED;
++}
++
++
++static void unbind_virq(void)
++{
++ unsigned int i;
++
++ for_each_online_cpu(i) {
++ if (ovf_irq[i] >= 0) {
++ unbind_from_irqhandler(ovf_irq[i], NULL);
++ ovf_irq[i] = -1;
++ }
++ }
++}
++
++
++static int bind_virq(void)
++{
++ unsigned int i;
++ int result;
++
++ for_each_online_cpu(i) {
++ result = bind_virq_to_irqhandler(VIRQ_XENOPROF,
++ i,
++ xenoprof_ovf_interrupt,
++ SA_INTERRUPT,
++ "xenoprof",
++ NULL);
++
++ if (result < 0) {
++ unbind_virq();
++ return result;
++ }
++
++ ovf_irq[i] = result;
++ }
++
++ return 0;
++}
++
++
++static void unmap_passive_list(void)
++{
++ int i;
++ for (i = 0; i < pdomains; i++)
++ xenoprof_arch_unmap_shared_buffer(&p_shared_buffer[i]);
++ pdomains = 0;
++}
++
++
++static int map_xenoprof_buffer(int max_samples)
++{
++ struct xenoprof_get_buffer get_buffer;
++ struct xenoprof_buf *buf;
++ int ret, i;
++
++ if ( shared_buffer.buffer )
++ return 0;
++
++ get_buffer.max_samples = max_samples;
++ ret = xenoprof_arch_map_shared_buffer(&get_buffer, &shared_buffer);
++ if (ret)
++ return ret;
++ nbuf = get_buffer.nbuf;
++
++ for (i=0; i< nbuf; i++) {
++ buf = (struct xenoprof_buf*)
++ &shared_buffer.buffer[i * get_buffer.bufsize];
++ BUG_ON(buf->vcpu_id >= MAX_VIRT_CPUS);
++ xenoprof_buf[buf->vcpu_id] = buf;
++ }
++
++ return 0;
++}
++
++
++static int xenoprof_setup(void)
++{
++ int ret;
++
++ if ( (ret = map_xenoprof_buffer(MAX_XENOPROF_SAMPLES)) )
++ return ret;
++
++ if ( (ret = bind_virq()) )
++ return ret;
++
++ if (xenoprof_is_primary) {
++ /* Define dom0 as an active domain if not done yet */
++ if (!active_defined) {
++ domid_t domid;
++ ret = HYPERVISOR_xenoprof_op(
++ XENOPROF_reset_active_list, NULL);
++ if (ret)
++ goto err;
++ domid = 0;
++ ret = HYPERVISOR_xenoprof_op(
++ XENOPROF_set_active, &domid);
++ if (ret)
++ goto err;
++ active_defined = 1;
++ }
++
++ if (backtrace_depth > 0) {
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_set_backtrace,
++ &backtrace_depth);
++ if (ret)
++ backtrace_depth = 0;
++ }
++
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_reserve_counters, NULL);
++ if (ret)
++ goto err;
++
++ xenoprof_arch_counter();
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_setup_events, NULL);
++ if (ret)
++ goto err;
++ }
++
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_enable_virq, NULL);
++ if (ret)
++ goto err;
++
++ xenoprof_enabled = 1;
++ return 0;
++ err:
++ unbind_virq();
++ return ret;
++}
++
++
++static void xenoprof_shutdown(void)
++{
++ xenoprof_enabled = 0;
++
++ WARN_ON(HYPERVISOR_xenoprof_op(XENOPROF_disable_virq, NULL));
++
++ if (xenoprof_is_primary) {
++ WARN_ON(HYPERVISOR_xenoprof_op(XENOPROF_release_counters,
++ NULL));
++ active_defined = 0;
++ }
++
++ unbind_virq();
++
++ xenoprof_arch_unmap_shared_buffer(&shared_buffer);
++ if (xenoprof_is_primary)
++ unmap_passive_list();
++}
++
++
++static int xenoprof_start(void)
++{
++ int ret = 0;
++
++ if (xenoprof_is_primary)
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_start, NULL);
++ if (!ret)
++ xenoprof_arch_start();
++ return ret;
++}
++
++
++static void xenoprof_stop(void)
++{
++ if (xenoprof_is_primary)
++ WARN_ON(HYPERVISOR_xenoprof_op(XENOPROF_stop, NULL));
++ xenoprof_arch_stop();
++}
++
++
++static int xenoprof_set_active(int * active_domains,
++ unsigned int adomains)
++{
++ int ret = 0;
++ int i;
++ int set_dom0 = 0;
++ domid_t domid;
++
++ if (!xenoprof_is_primary)
++ return 0;
++
++ if (adomains > MAX_OPROF_DOMAINS)
++ return -E2BIG;
++
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_reset_active_list, NULL);
++ if (ret)
++ return ret;
++
++ for (i=0; i<adomains; i++) {
++ domid = active_domains[i];
++ if (domid != active_domains[i]) {
++ ret = -EINVAL;
++ goto out;
++ }
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_set_active, &domid);
++ if (ret)
++ goto out;
++ if (active_domains[i] == 0)
++ set_dom0 = 1;
++ }
++ /* dom0 must always be active but may not be in the list */
++ if (!set_dom0) {
++ domid = 0;
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_set_active, &domid);
++ }
++
++out:
++ if (ret)
++ WARN_ON(HYPERVISOR_xenoprof_op(XENOPROF_reset_active_list,
++ NULL));
++ active_defined = !ret;
++ return ret;
++}
++
++static int xenoprof_set_passive(int * p_domains,
++ unsigned int pdoms)
++{
++ int ret;
++ unsigned int i, j;
++ struct xenoprof_buf *buf;
++
++ if (!xenoprof_is_primary)
++ return 0;
++
++ if (pdoms > MAX_OPROF_DOMAINS)
++ return -E2BIG;
++
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_reset_passive_list, NULL);
++ if (ret)
++ return ret;
++ unmap_passive_list();
++
++ for (i = 0; i < pdoms; i++) {
++ passive_domains[i].domain_id = p_domains[i];
++ passive_domains[i].max_samples = 2048;
++ ret = xenoprof_arch_set_passive(&passive_domains[i],
++ &p_shared_buffer[i]);
++ if (ret)
++ goto out;
++ for (j = 0; j < passive_domains[i].nbuf; j++) {
++ buf = (struct xenoprof_buf *)
++ &p_shared_buffer[i].buffer[
++ j * passive_domains[i].bufsize];
++ BUG_ON(buf->vcpu_id >= MAX_VIRT_CPUS);
++ p_xenoprof_buf[i][buf->vcpu_id] = buf;
++ }
++ }
++
++ pdomains = pdoms;
++ return 0;
++
++out:
++ for (j = 0; j < i; j++)
++ xenoprof_arch_unmap_shared_buffer(&p_shared_buffer[i]);
++
++ return ret;
++}
++
++
++/* The dummy backtrace function to keep oprofile happy
++ * The real backtrace is done in xen
++ */
++static void xenoprof_dummy_backtrace(struct pt_regs * const regs,
++ unsigned int depth)
++{
++ /* this should never be called */
++ BUG();
++ return;
++}
++
++
++static struct oprofile_operations xenoprof_ops = {
++#ifdef HAVE_XENOPROF_CREATE_FILES
++ .create_files = xenoprof_create_files,
++#endif
++ .set_active = xenoprof_set_active,
++ .set_passive = xenoprof_set_passive,
++ .setup = xenoprof_setup,
++ .shutdown = xenoprof_shutdown,
++ .start = xenoprof_start,
++ .stop = xenoprof_stop,
++ .backtrace = xenoprof_dummy_backtrace
++};
++
++
++/* in order to get driverfs right */
++static int using_xenoprof;
++
++int __init xenoprofile_init(struct oprofile_operations * ops)
++{
++ struct xenoprof_init init;
++ unsigned int i;
++ int ret;
++
++ ret = HYPERVISOR_xenoprof_op(XENOPROF_init, &init);
++ if (!ret) {
++ xenoprof_arch_init_counter(&init);
++ xenoprof_is_primary = init.is_primary;
++
++ /* cpu_type is detected by Xen */
++ cpu_type[XENOPROF_CPU_TYPE_SIZE-1] = 0;
++ strncpy(cpu_type, init.cpu_type, XENOPROF_CPU_TYPE_SIZE - 1);
++ xenoprof_ops.cpu_type = cpu_type;
++
++ init_driverfs();
++ using_xenoprof = 1;
++ *ops = xenoprof_ops;
++
++ for (i=0; i<NR_CPUS; i++)
++ ovf_irq[i] = -1;
++
++ active_defined = 0;
++ }
++
++ printk(KERN_INFO "%s: ret %d, events %d, xenoprof_is_primary %d\n",
++ __func__, ret, init.num_events, xenoprof_is_primary);
++ return ret;
++}
++
++
++void xenoprofile_exit(void)
++{
++ if (using_xenoprof)
++ exit_driverfs();
++
++ xenoprof_arch_unmap_shared_buffer(&shared_buffer);
++ if (xenoprof_is_primary) {
++ unmap_passive_list();
++ WARN_ON(HYPERVISOR_xenoprof_op(XENOPROF_shutdown, NULL));
++ }
++}
--- /dev/null
+Subject: xen3 include-xen-interface
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-11-25/include/xen/interface/COPYING
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/COPYING 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,38 @@
++XEN NOTICE
++==========
++
++This copyright applies to all files within this subdirectory and its
++subdirectories:
++ include/public/*.h
++ include/public/hvm/*.h
++ include/public/io/*.h
++
++The intention is that these files can be freely copied into the source
++tree of an operating system when porting that OS to run on Xen. Doing
++so does *not* cause the OS to become subject to the terms of the GPL.
++
++All other files in the Xen source distribution are covered by version
++2 of the GNU General Public License except where explicitly stated
++otherwise within individual source files.
++
++ -- Keir Fraser (on behalf of the Xen team)
++
++=====================================================================
++
++Permission is hereby granted, free of charge, to any person obtaining a copy
++of this software and associated documentation files (the "Software"), to
++deal in the Software without restriction, including without limitation the
++rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++sell copies of the Software, and to permit persons to whom the Software is
++furnished to do so, subject to the following conditions:
++
++The above copyright notice and this permission notice shall be included in
++all copies or substantial portions of the Software.
++
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++DEALINGS IN THE SOFTWARE.
+Index: head-2008-11-25/include/xen/interface/acm.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/acm.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,228 @@
++/*
++ * acm.h: Xen access control module interface defintions
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Reiner Sailer <sailer@watson.ibm.com>
++ * Copyright (c) 2005, International Business Machines Corporation.
++ */
++
++#ifndef _XEN_PUBLIC_ACM_H
++#define _XEN_PUBLIC_ACM_H
++
++#include "xen.h"
++
++/* if ACM_DEBUG defined, all hooks should
++ * print a short trace message (comment it out
++ * when not in testing mode )
++ */
++/* #define ACM_DEBUG */
++
++#ifdef ACM_DEBUG
++# define printkd(fmt, args...) printk(fmt,## args)
++#else
++# define printkd(fmt, args...)
++#endif
++
++/* default ssid reference value if not supplied */
++#define ACM_DEFAULT_SSID 0x0
++#define ACM_DEFAULT_LOCAL_SSID 0x0
++
++/* Internal ACM ERROR types */
++#define ACM_OK 0
++#define ACM_UNDEF -1
++#define ACM_INIT_SSID_ERROR -2
++#define ACM_INIT_SOID_ERROR -3
++#define ACM_ERROR -4
++
++/* External ACCESS DECISIONS */
++#define ACM_ACCESS_PERMITTED 0
++#define ACM_ACCESS_DENIED -111
++#define ACM_NULL_POINTER_ERROR -200
++
++/*
++ Error codes reported in when trying to test for a new policy
++ These error codes are reported in an array of tuples where
++ each error code is followed by a parameter describing the error
++ more closely, such as a domain id.
++*/
++#define ACM_EVTCHN_SHARING_VIOLATION 0x100
++#define ACM_GNTTAB_SHARING_VIOLATION 0x101
++#define ACM_DOMAIN_LOOKUP 0x102
++#define ACM_CHWALL_CONFLICT 0x103
++#define ACM_SSIDREF_IN_USE 0x104
++
++
++/* primary policy in lower 4 bits */
++#define ACM_NULL_POLICY 0
++#define ACM_CHINESE_WALL_POLICY 1
++#define ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY 2
++#define ACM_POLICY_UNDEFINED 15
++
++/* combinations have secondary policy component in higher 4bit */
++#define ACM_CHINESE_WALL_AND_SIMPLE_TYPE_ENFORCEMENT_POLICY \
++ ((ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY << 4) | ACM_CHINESE_WALL_POLICY)
++
++/* policy: */
++#define ACM_POLICY_NAME(X) \
++ ((X) == (ACM_NULL_POLICY)) ? "NULL" : \
++ ((X) == (ACM_CHINESE_WALL_POLICY)) ? "CHINESE WALL" : \
++ ((X) == (ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY)) ? "SIMPLE TYPE ENFORCEMENT" : \
++ ((X) == (ACM_CHINESE_WALL_AND_SIMPLE_TYPE_ENFORCEMENT_POLICY)) ? "CHINESE WALL AND SIMPLE TYPE ENFORCEMENT" : \
++ "UNDEFINED"
++
++/* the following policy versions must be increased
++ * whenever the interpretation of the related
++ * policy's data structure changes
++ */
++#define ACM_POLICY_VERSION 3
++#define ACM_CHWALL_VERSION 1
++#define ACM_STE_VERSION 1
++
++/* defines a ssid reference used by xen */
++typedef uint32_t ssidref_t;
++
++/* hooks that are known to domains */
++#define ACMHOOK_none 0
++#define ACMHOOK_sharing 1
++
++/* -------security policy relevant type definitions-------- */
++
++/* type identifier; compares to "equal" or "not equal" */
++typedef uint16_t domaintype_t;
++
++/* CHINESE WALL POLICY DATA STRUCTURES
++ *
++ * current accumulated conflict type set:
++ * When a domain is started and has a type that is in
++ * a conflict set, the conflicting types are incremented in
++ * the aggregate set. When a domain is destroyed, the
++ * conflicting types to its type are decremented.
++ * If a domain has multiple types, this procedure works over
++ * all those types.
++ *
++ * conflict_aggregate_set[i] holds the number of
++ * running domains that have a conflict with type i.
++ *
++ * running_types[i] holds the number of running domains
++ * that include type i in their ssidref-referenced type set
++ *
++ * conflict_sets[i][j] is "0" if type j has no conflict
++ * with type i and is "1" otherwise.
++ */
++/* high-16 = version, low-16 = check magic */
++#define ACM_MAGIC 0x0001debc
++
++/* each offset in bytes from start of the struct they
++ * are part of */
++
++/* V3 of the policy buffer aded a version structure */
++struct acm_policy_version
++{
++ uint32_t major;
++ uint32_t minor;
++};
++
++
++/* each buffer consists of all policy information for
++ * the respective policy given in the policy code
++ *
++ * acm_policy_buffer, acm_chwall_policy_buffer,
++ * and acm_ste_policy_buffer need to stay 32-bit aligned
++ * because we create binary policies also with external
++ * tools that assume packed representations (e.g. the java tool)
++ */
++struct acm_policy_buffer {
++ uint32_t policy_version; /* ACM_POLICY_VERSION */
++ uint32_t magic;
++ uint32_t len;
++ uint32_t policy_reference_offset;
++ uint32_t primary_policy_code;
++ uint32_t primary_buffer_offset;
++ uint32_t secondary_policy_code;
++ uint32_t secondary_buffer_offset;
++ struct acm_policy_version xml_pol_version; /* add in V3 */
++};
++
++
++struct acm_policy_reference_buffer {
++ uint32_t len;
++};
++
++struct acm_chwall_policy_buffer {
++ uint32_t policy_version; /* ACM_CHWALL_VERSION */
++ uint32_t policy_code;
++ uint32_t chwall_max_types;
++ uint32_t chwall_max_ssidrefs;
++ uint32_t chwall_max_conflictsets;
++ uint32_t chwall_ssid_offset;
++ uint32_t chwall_conflict_sets_offset;
++ uint32_t chwall_running_types_offset;
++ uint32_t chwall_conflict_aggregate_offset;
++};
++
++struct acm_ste_policy_buffer {
++ uint32_t policy_version; /* ACM_STE_VERSION */
++ uint32_t policy_code;
++ uint32_t ste_max_types;
++ uint32_t ste_max_ssidrefs;
++ uint32_t ste_ssid_offset;
++};
++
++struct acm_stats_buffer {
++ uint32_t magic;
++ uint32_t len;
++ uint32_t primary_policy_code;
++ uint32_t primary_stats_offset;
++ uint32_t secondary_policy_code;
++ uint32_t secondary_stats_offset;
++};
++
++struct acm_ste_stats_buffer {
++ uint32_t ec_eval_count;
++ uint32_t gt_eval_count;
++ uint32_t ec_denied_count;
++ uint32_t gt_denied_count;
++ uint32_t ec_cachehit_count;
++ uint32_t gt_cachehit_count;
++};
++
++struct acm_ssid_buffer {
++ uint32_t len;
++ ssidref_t ssidref;
++ uint32_t policy_reference_offset;
++ uint32_t primary_policy_code;
++ uint32_t primary_max_types;
++ uint32_t primary_types_offset;
++ uint32_t secondary_policy_code;
++ uint32_t secondary_max_types;
++ uint32_t secondary_types_offset;
++};
++
++#endif
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/acm_ops.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/acm_ops.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,159 @@
++/*
++ * acm_ops.h: Xen access control module hypervisor commands
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Reiner Sailer <sailer@watson.ibm.com>
++ * Copyright (c) 2005,2006 International Business Machines Corporation.
++ */
++
++#ifndef __XEN_PUBLIC_ACM_OPS_H__
++#define __XEN_PUBLIC_ACM_OPS_H__
++
++#include "xen.h"
++#include "acm.h"
++
++/*
++ * Make sure you increment the interface version whenever you modify this file!
++ * This makes sure that old versions of acm tools will stop working in a
++ * well-defined way (rather than crashing the machine, for instance).
++ */
++#define ACM_INTERFACE_VERSION 0xAAAA000A
++
++/************************************************************************/
++
++/*
++ * Prototype for this hypercall is:
++ * int acm_op(int cmd, void *args)
++ * @cmd == ACMOP_??? (access control module operation).
++ * @args == Operation-specific extra arguments (NULL if none).
++ */
++
++
++#define ACMOP_setpolicy 1
++struct acm_setpolicy {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) pushcache;
++ uint32_t pushcache_size;
++};
++
++
++#define ACMOP_getpolicy 2
++struct acm_getpolicy {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) pullcache;
++ uint32_t pullcache_size;
++};
++
++
++#define ACMOP_dumpstats 3
++struct acm_dumpstats {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) pullcache;
++ uint32_t pullcache_size;
++};
++
++
++#define ACMOP_getssid 4
++#define ACM_GETBY_ssidref 1
++#define ACM_GETBY_domainid 2
++struct acm_getssid {
++ /* IN */
++ uint32_t get_ssid_by; /* ACM_GETBY_* */
++ union {
++ domaintype_t domainid;
++ ssidref_t ssidref;
++ } id;
++ XEN_GUEST_HANDLE_64(void) ssidbuf;
++ uint32_t ssidbuf_size;
++};
++
++#define ACMOP_getdecision 5
++struct acm_getdecision {
++ /* IN */
++ uint32_t get_decision_by1; /* ACM_GETBY_* */
++ uint32_t get_decision_by2; /* ACM_GETBY_* */
++ union {
++ domaintype_t domainid;
++ ssidref_t ssidref;
++ } id1;
++ union {
++ domaintype_t domainid;
++ ssidref_t ssidref;
++ } id2;
++ uint32_t hook;
++ /* OUT */
++ uint32_t acm_decision;
++};
++
++
++#define ACMOP_chgpolicy 6
++struct acm_change_policy {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) policy_pushcache;
++ uint32_t policy_pushcache_size;
++ XEN_GUEST_HANDLE_64(void) del_array;
++ uint32_t delarray_size;
++ XEN_GUEST_HANDLE_64(void) chg_array;
++ uint32_t chgarray_size;
++ /* OUT */
++ /* array with error code */
++ XEN_GUEST_HANDLE_64(void) err_array;
++ uint32_t errarray_size;
++};
++
++#define ACMOP_relabeldoms 7
++struct acm_relabel_doms {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) relabel_map;
++ uint32_t relabel_map_size;
++ /* OUT */
++ XEN_GUEST_HANDLE_64(void) err_array;
++ uint32_t errarray_size;
++};
++
++/* future interface to Xen */
++struct xen_acmctl {
++ uint32_t cmd;
++ uint32_t interface_version;
++ union {
++ struct acm_setpolicy setpolicy;
++ struct acm_getpolicy getpolicy;
++ struct acm_dumpstats dumpstats;
++ struct acm_getssid getssid;
++ struct acm_getdecision getdecision;
++ struct acm_change_policy change_policy;
++ struct acm_relabel_doms relabel_doms;
++ } u;
++};
++
++typedef struct xen_acmctl xen_acmctl_t;
++DEFINE_XEN_GUEST_HANDLE(xen_acmctl_t);
++
++#endif /* __XEN_PUBLIC_ACM_OPS_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/arch-x86/cpuid.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/arch-x86/cpuid.h 2008-01-21 11:15:27.000000000 +0100
+@@ -0,0 +1,68 @@
++/******************************************************************************
++ * arch-x86/cpuid.h
++ *
++ * CPUID interface to Xen.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2007 Citrix Systems, Inc.
++ *
++ * Authors:
++ * Keir Fraser <keir.fraser@citrix.com>
++ */
++
++#ifndef __XEN_PUBLIC_ARCH_X86_CPUID_H__
++#define __XEN_PUBLIC_ARCH_X86_CPUID_H__
++
++/* Xen identification leaves start at 0x40000000. */
++#define XEN_CPUID_FIRST_LEAF 0x40000000
++#define XEN_CPUID_LEAF(i) (XEN_CPUID_FIRST_LEAF + (i))
++
++/*
++ * Leaf 1 (0x40000000)
++ * EAX: Largest Xen-information leaf. All leaves up to an including @EAX
++ * are supported by the Xen host.
++ * EBX-EDX: "XenVMMXenVMM" signature, allowing positive identification
++ * of a Xen host.
++ */
++#define XEN_CPUID_SIGNATURE_EBX 0x566e6558 /* "XenV" */
++#define XEN_CPUID_SIGNATURE_ECX 0x65584d4d /* "MMXe" */
++#define XEN_CPUID_SIGNATURE_EDX 0x4d4d566e /* "nVMM" */
++
++/*
++ * Leaf 2 (0x40000001)
++ * EAX[31:16]: Xen major version.
++ * EAX[15: 0]: Xen minor version.
++ * EBX-EDX: Reserved (currently all zeroes).
++ */
++
++/*
++ * Leaf 3 (0x40000002)
++ * EAX: Number of hypercall transfer pages. This register is always guaranteed
++ * to specify one hypercall page.
++ * EBX: Base address of Xen-specific MSRs.
++ * ECX: Features 1. Unused bits are set to zero.
++ * EDX: Features 2. Unused bits are set to zero.
++ */
++
++/* Does the host support MMU_PT_UPDATE_PRESERVE_AD for this guest? */
++#define _XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD 0
++#define XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD (1u<<0)
++
++#endif /* __XEN_PUBLIC_ARCH_X86_CPUID_H__ */
+Index: head-2008-11-25/include/xen/interface/arch-x86/hvm/save.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/arch-x86/hvm/save.h 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,440 @@
++/*
++ * Structure definitions for HVM state that is held by Xen and must
++ * be saved along with the domain's memory and device-model state.
++ *
++ * Copyright (c) 2007 XenSource Ltd.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_PUBLIC_HVM_SAVE_X86_H__
++#define __XEN_PUBLIC_HVM_SAVE_X86_H__
++
++/*
++ * Save/restore header: general info about the save file.
++ */
++
++#define HVM_FILE_MAGIC 0x54381286
++#define HVM_FILE_VERSION 0x00000001
++
++struct hvm_save_header {
++ uint32_t magic; /* Must be HVM_FILE_MAGIC */
++ uint32_t version; /* File format version */
++ uint64_t changeset; /* Version of Xen that saved this file */
++ uint32_t cpuid; /* CPUID[0x01][%eax] on the saving machine */
++ uint32_t pad0;
++};
++
++DECLARE_HVM_SAVE_TYPE(HEADER, 1, struct hvm_save_header);
++
++
++/*
++ * Processor
++ */
++
++struct hvm_hw_cpu {
++ uint8_t fpu_regs[512];
++
++ uint64_t rax;
++ uint64_t rbx;
++ uint64_t rcx;
++ uint64_t rdx;
++ uint64_t rbp;
++ uint64_t rsi;
++ uint64_t rdi;
++ uint64_t rsp;
++ uint64_t r8;
++ uint64_t r9;
++ uint64_t r10;
++ uint64_t r11;
++ uint64_t r12;
++ uint64_t r13;
++ uint64_t r14;
++ uint64_t r15;
++
++ uint64_t rip;
++ uint64_t rflags;
++
++ uint64_t cr0;
++ uint64_t cr2;
++ uint64_t cr3;
++ uint64_t cr4;
++
++ uint64_t dr0;
++ uint64_t dr1;
++ uint64_t dr2;
++ uint64_t dr3;
++ uint64_t dr6;
++ uint64_t dr7;
++
++ uint32_t cs_sel;
++ uint32_t ds_sel;
++ uint32_t es_sel;
++ uint32_t fs_sel;
++ uint32_t gs_sel;
++ uint32_t ss_sel;
++ uint32_t tr_sel;
++ uint32_t ldtr_sel;
++
++ uint32_t cs_limit;
++ uint32_t ds_limit;
++ uint32_t es_limit;
++ uint32_t fs_limit;
++ uint32_t gs_limit;
++ uint32_t ss_limit;
++ uint32_t tr_limit;
++ uint32_t ldtr_limit;
++ uint32_t idtr_limit;
++ uint32_t gdtr_limit;
++
++ uint64_t cs_base;
++ uint64_t ds_base;
++ uint64_t es_base;
++ uint64_t fs_base;
++ uint64_t gs_base;
++ uint64_t ss_base;
++ uint64_t tr_base;
++ uint64_t ldtr_base;
++ uint64_t idtr_base;
++ uint64_t gdtr_base;
++
++ uint32_t cs_arbytes;
++ uint32_t ds_arbytes;
++ uint32_t es_arbytes;
++ uint32_t fs_arbytes;
++ uint32_t gs_arbytes;
++ uint32_t ss_arbytes;
++ uint32_t tr_arbytes;
++ uint32_t ldtr_arbytes;
++
++ uint32_t sysenter_cs;
++ uint32_t padding0;
++
++ uint64_t sysenter_esp;
++ uint64_t sysenter_eip;
++
++ /* msr for em64t */
++ uint64_t shadow_gs;
++
++ /* msr content saved/restored. */
++ uint64_t msr_flags;
++ uint64_t msr_lstar;
++ uint64_t msr_star;
++ uint64_t msr_cstar;
++ uint64_t msr_syscall_mask;
++ uint64_t msr_efer;
++
++ /* guest's idea of what rdtsc() would return */
++ uint64_t tsc;
++
++ /* pending event, if any */
++ union {
++ uint32_t pending_event;
++ struct {
++ uint8_t pending_vector:8;
++ uint8_t pending_type:3;
++ uint8_t pending_error_valid:1;
++ uint32_t pending_reserved:19;
++ uint8_t pending_valid:1;
++ };
++ };
++ /* error code for pending event */
++ uint32_t error_code;
++};
++
++DECLARE_HVM_SAVE_TYPE(CPU, 2, struct hvm_hw_cpu);
++
++
++/*
++ * PIC
++ */
++
++struct hvm_hw_vpic {
++ /* IR line bitmasks. */
++ uint8_t irr;
++ uint8_t imr;
++ uint8_t isr;
++
++ /* Line IRx maps to IRQ irq_base+x */
++ uint8_t irq_base;
++
++ /*
++ * Where are we in ICW2-4 initialisation (0 means no init in progress)?
++ * Bits 0-1 (=x): Next write at A=1 sets ICW(x+1).
++ * Bit 2: ICW1.IC4 (1 == ICW4 included in init sequence)
++ * Bit 3: ICW1.SNGL (0 == ICW3 included in init sequence)
++ */
++ uint8_t init_state:4;
++
++ /* IR line with highest priority. */
++ uint8_t priority_add:4;
++
++ /* Reads from A=0 obtain ISR or IRR? */
++ uint8_t readsel_isr:1;
++
++ /* Reads perform a polling read? */
++ uint8_t poll:1;
++
++ /* Automatically clear IRQs from the ISR during INTA? */
++ uint8_t auto_eoi:1;
++
++ /* Automatically rotate IRQ priorities during AEOI? */
++ uint8_t rotate_on_auto_eoi:1;
++
++ /* Exclude slave inputs when considering in-service IRQs? */
++ uint8_t special_fully_nested_mode:1;
++
++ /* Special mask mode excludes masked IRs from AEOI and priority checks. */
++ uint8_t special_mask_mode:1;
++
++ /* Is this a master PIC or slave PIC? (NB. This is not programmable.) */
++ uint8_t is_master:1;
++
++ /* Edge/trigger selection. */
++ uint8_t elcr;
++
++ /* Virtual INT output. */
++ uint8_t int_output;
++};
++
++DECLARE_HVM_SAVE_TYPE(PIC, 3, struct hvm_hw_vpic);
++
++
++/*
++ * IO-APIC
++ */
++
++#ifdef __ia64__
++#define VIOAPIC_IS_IOSAPIC 1
++#define VIOAPIC_NUM_PINS 24
++#else
++#define VIOAPIC_NUM_PINS 48 /* 16 ISA IRQs, 32 non-legacy PCI IRQS. */
++#endif
++
++struct hvm_hw_vioapic {
++ uint64_t base_address;
++ uint32_t ioregsel;
++ uint32_t id;
++ union vioapic_redir_entry
++ {
++ uint64_t bits;
++ struct {
++ uint8_t vector;
++ uint8_t delivery_mode:3;
++ uint8_t dest_mode:1;
++ uint8_t delivery_status:1;
++ uint8_t polarity:1;
++ uint8_t remote_irr:1;
++ uint8_t trig_mode:1;
++ uint8_t mask:1;
++ uint8_t reserve:7;
++#if !VIOAPIC_IS_IOSAPIC
++ uint8_t reserved[4];
++ uint8_t dest_id;
++#else
++ uint8_t reserved[3];
++ uint16_t dest_id;
++#endif
++ } fields;
++ } redirtbl[VIOAPIC_NUM_PINS];
++};
++
++DECLARE_HVM_SAVE_TYPE(IOAPIC, 4, struct hvm_hw_vioapic);
++
++
++/*
++ * LAPIC
++ */
++
++struct hvm_hw_lapic {
++ uint64_t apic_base_msr;
++ uint32_t disabled; /* VLAPIC_xx_DISABLED */
++ uint32_t timer_divisor;
++};
++
++DECLARE_HVM_SAVE_TYPE(LAPIC, 5, struct hvm_hw_lapic);
++
++struct hvm_hw_lapic_regs {
++ uint8_t data[1024];
++};
++
++DECLARE_HVM_SAVE_TYPE(LAPIC_REGS, 6, struct hvm_hw_lapic_regs);
++
++
++/*
++ * IRQs
++ */
++
++struct hvm_hw_pci_irqs {
++ /*
++ * Virtual interrupt wires for a single PCI bus.
++ * Indexed by: device*4 + INTx#.
++ */
++ union {
++ DECLARE_BITMAP(i, 32*4);
++ uint64_t pad[2];
++ };
++};
++
++DECLARE_HVM_SAVE_TYPE(PCI_IRQ, 7, struct hvm_hw_pci_irqs);
++
++struct hvm_hw_isa_irqs {
++ /*
++ * Virtual interrupt wires for ISA devices.
++ * Indexed by ISA IRQ (assumes no ISA-device IRQ sharing).
++ */
++ union {
++ DECLARE_BITMAP(i, 16);
++ uint64_t pad[1];
++ };
++};
++
++DECLARE_HVM_SAVE_TYPE(ISA_IRQ, 8, struct hvm_hw_isa_irqs);
++
++struct hvm_hw_pci_link {
++ /*
++ * PCI-ISA interrupt router.
++ * Each PCI <device:INTx#> is 'wire-ORed' into one of four links using
++ * the traditional 'barber's pole' mapping ((device + INTx#) & 3).
++ * The router provides a programmable mapping from each link to a GSI.
++ */
++ uint8_t route[4];
++ uint8_t pad0[4];
++};
++
++DECLARE_HVM_SAVE_TYPE(PCI_LINK, 9, struct hvm_hw_pci_link);
++
++/*
++ * PIT
++ */
++
++struct hvm_hw_pit {
++ struct hvm_hw_pit_channel {
++ uint32_t count; /* can be 65536 */
++ uint16_t latched_count;
++ uint8_t count_latched;
++ uint8_t status_latched;
++ uint8_t status;
++ uint8_t read_state;
++ uint8_t write_state;
++ uint8_t write_latch;
++ uint8_t rw_mode;
++ uint8_t mode;
++ uint8_t bcd; /* not supported */
++ uint8_t gate; /* timer start */
++ } channels[3]; /* 3 x 16 bytes */
++ uint32_t speaker_data_on;
++ uint32_t pad0;
++};
++
++DECLARE_HVM_SAVE_TYPE(PIT, 10, struct hvm_hw_pit);
++
++
++/*
++ * RTC
++ */
++
++#define RTC_CMOS_SIZE 14
++struct hvm_hw_rtc {
++ /* CMOS bytes */
++ uint8_t cmos_data[RTC_CMOS_SIZE];
++ /* Index register for 2-part operations */
++ uint8_t cmos_index;
++ uint8_t pad0;
++};
++
++DECLARE_HVM_SAVE_TYPE(RTC, 11, struct hvm_hw_rtc);
++
++
++/*
++ * HPET
++ */
++
++#define HPET_TIMER_NUM 3 /* 3 timers supported now */
++struct hvm_hw_hpet {
++ /* Memory-mapped, software visible registers */
++ uint64_t capability; /* capabilities */
++ uint64_t res0; /* reserved */
++ uint64_t config; /* configuration */
++ uint64_t res1; /* reserved */
++ uint64_t isr; /* interrupt status reg */
++ uint64_t res2[25]; /* reserved */
++ uint64_t mc64; /* main counter */
++ uint64_t res3; /* reserved */
++ struct { /* timers */
++ uint64_t config; /* configuration/cap */
++ uint64_t cmp; /* comparator */
++ uint64_t fsb; /* FSB route, not supported now */
++ uint64_t res4; /* reserved */
++ } timers[HPET_TIMER_NUM];
++ uint64_t res5[4*(24-HPET_TIMER_NUM)]; /* reserved, up to 0x3ff */
++
++ /* Hidden register state */
++ uint64_t period[HPET_TIMER_NUM]; /* Last value written to comparator */
++};
++
++DECLARE_HVM_SAVE_TYPE(HPET, 12, struct hvm_hw_hpet);
++
++
++/*
++ * PM timer
++ */
++
++struct hvm_hw_pmtimer {
++ uint32_t tmr_val; /* PM_TMR_BLK.TMR_VAL: 32bit free-running counter */
++ uint16_t pm1a_sts; /* PM1a_EVT_BLK.PM1a_STS: status register */
++ uint16_t pm1a_en; /* PM1a_EVT_BLK.PM1a_EN: enable register */
++};
++
++DECLARE_HVM_SAVE_TYPE(PMTIMER, 13, struct hvm_hw_pmtimer);
++
++/*
++ * MTRR MSRs
++ */
++
++struct hvm_hw_mtrr {
++#define MTRR_VCNT 8
++#define NUM_FIXED_MSR 11
++ uint64_t msr_pat_cr;
++ /* mtrr physbase & physmask msr pair*/
++ uint64_t msr_mtrr_var[MTRR_VCNT*2];
++ uint64_t msr_mtrr_fixed[NUM_FIXED_MSR];
++ uint64_t msr_mtrr_cap;
++ uint64_t msr_mtrr_def_type;
++};
++
++DECLARE_HVM_SAVE_TYPE(MTRR, 14, struct hvm_hw_mtrr);
++
++/*
++ * Viridian hypervisor context.
++ */
++
++struct hvm_viridian_context {
++ uint64_t hypercall_gpa;
++ uint64_t guest_os_id;
++};
++
++DECLARE_HVM_SAVE_TYPE(VIRIDIAN, 15, struct hvm_viridian_context);
++
++/*
++ * Largest type-code in use
++ */
++#define HVM_SAVE_CODE_MAX 15
++
++#endif /* __XEN_PUBLIC_HVM_SAVE_X86_H__ */
+Index: head-2008-11-25/include/xen/interface/arch-x86/xen-mca.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/arch-x86/xen-mca.h 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,279 @@
++/******************************************************************************
++ * arch-x86/mca.h
++ *
++ * Contributed by Advanced Micro Devices, Inc.
++ * Author: Christoph Egger <Christoph.Egger@amd.com>
++ *
++ * Guest OS machine check interface to x86 Xen.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++/* Full MCA functionality has the following Usecases from the guest side:
++ *
++ * Must have's:
++ * 1. Dom0 and DomU register machine check trap callback handlers
++ * (already done via "set_trap_table" hypercall)
++ * 2. Dom0 registers machine check event callback handler
++ * (doable via EVTCHNOP_bind_virq)
++ * 3. Dom0 and DomU fetches machine check data
++ * 4. Dom0 wants Xen to notify a DomU
++ * 5. Dom0 gets DomU ID from physical address
++ * 6. Dom0 wants Xen to kill DomU (already done for "xm destroy")
++ *
++ * Nice to have's:
++ * 7. Dom0 wants Xen to deactivate a physical CPU
++ * This is better done as separate task, physical CPU hotplugging,
++ * and hypercall(s) should be sysctl's
++ * 8. Page migration proposed from Xen NUMA work, where Dom0 can tell Xen to
++ * move a DomU (or Dom0 itself) away from a malicious page
++ * producing correctable errors.
++ * 9. offlining physical page:
++ * Xen free's and never re-uses a certain physical page.
++ * 10. Testfacility: Allow Dom0 to write values into machine check MSR's
++ * and tell Xen to trigger a machine check
++ */
++
++#ifndef __XEN_PUBLIC_ARCH_X86_MCA_H__
++#define __XEN_PUBLIC_ARCH_X86_MCA_H__
++
++/* Hypercall */
++#define __HYPERVISOR_mca __HYPERVISOR_arch_0
++
++#define XEN_MCA_INTERFACE_VERSION 0x03000001
++
++/* IN: Dom0 calls hypercall from MC event handler. */
++#define XEN_MC_CORRECTABLE 0x0
++/* IN: Dom0/DomU calls hypercall from MC trap handler. */
++#define XEN_MC_TRAP 0x1
++/* XEN_MC_CORRECTABLE and XEN_MC_TRAP are mutually exclusive. */
++
++/* OUT: All is ok */
++#define XEN_MC_OK 0x0
++/* OUT: Domain could not fetch data. */
++#define XEN_MC_FETCHFAILED 0x1
++/* OUT: There was no machine check data to fetch. */
++#define XEN_MC_NODATA 0x2
++/* OUT: Between notification time and this hypercall an other
++ * (most likely) correctable error happened. The fetched data,
++ * does not match the original machine check data. */
++#define XEN_MC_NOMATCH 0x4
++
++/* OUT: DomU did not register MC NMI handler. Try something else. */
++#define XEN_MC_CANNOTHANDLE 0x8
++/* OUT: Notifying DomU failed. Retry later or try something else. */
++#define XEN_MC_NOTDELIVERED 0x10
++/* Note, XEN_MC_CANNOTHANDLE and XEN_MC_NOTDELIVERED are mutually exclusive. */
++
++
++#ifndef __ASSEMBLY__
++
++#define VIRQ_MCA VIRQ_ARCH_0 /* G. (DOM0) Machine Check Architecture */
++
++/*
++ * Machine Check Architecure:
++ * structs are read-only and used to report all kinds of
++ * correctable and uncorrectable errors detected by the HW.
++ * Dom0 and DomU: register a handler to get notified.
++ * Dom0 only: Correctable errors are reported via VIRQ_MCA
++ * Dom0 and DomU: Uncorrectable errors are reported via nmi handlers
++ */
++#define MC_TYPE_GLOBAL 0
++#define MC_TYPE_BANK 1
++#define MC_TYPE_EXTENDED 2
++
++struct mcinfo_common {
++ uint16_t type; /* structure type */
++ uint16_t size; /* size of this struct in bytes */
++};
++
++
++#define MC_FLAG_CORRECTABLE (1 << 0)
++#define MC_FLAG_UNCORRECTABLE (1 << 1)
++
++/* contains global x86 mc information */
++struct mcinfo_global {
++ struct mcinfo_common common;
++
++ /* running domain at the time in error (most likely the impacted one) */
++ uint16_t mc_domid;
++ uint32_t mc_socketid; /* physical socket of the physical core */
++ uint16_t mc_coreid; /* physical impacted core */
++ uint16_t mc_core_threadid; /* core thread of physical core */
++ uint16_t mc_vcpuid; /* virtual cpu scheduled for mc_domid */
++ uint64_t mc_gstatus; /* global status */
++ uint32_t mc_flags;
++};
++
++/* contains bank local x86 mc information */
++struct mcinfo_bank {
++ struct mcinfo_common common;
++
++ uint16_t mc_bank; /* bank nr */
++ uint16_t mc_domid; /* Usecase 5: domain referenced by mc_addr on dom0
++ * and if mc_addr is valid. Never valid on DomU. */
++ uint64_t mc_status; /* bank status */
++ uint64_t mc_addr; /* bank address, only valid
++ * if addr bit is set in mc_status */
++ uint64_t mc_misc;
++};
++
++
++struct mcinfo_msr {
++ uint64_t reg; /* MSR */
++ uint64_t value; /* MSR value */
++};
++
++/* contains mc information from other
++ * or additional mc MSRs */
++struct mcinfo_extended {
++ struct mcinfo_common common;
++
++ /* You can fill up to five registers.
++ * If you need more, then use this structure
++ * multiple times. */
++
++ uint32_t mc_msrs; /* Number of msr with valid values. */
++ struct mcinfo_msr mc_msr[5];
++};
++
++#define MCINFO_HYPERCALLSIZE 1024
++#define MCINFO_MAXSIZE 768
++
++struct mc_info {
++ /* Number of mcinfo_* entries in mi_data */
++ uint32_t mi_nentries;
++
++ uint8_t mi_data[MCINFO_MAXSIZE - sizeof(uint32_t)];
++};
++typedef struct mc_info mc_info_t;
++
++
++
++/*
++ * OS's should use these instead of writing their own lookup function
++ * each with its own bugs and drawbacks.
++ * We use macros instead of static inline functions to allow guests
++ * to include this header in assembly files (*.S).
++ */
++/* Prototype:
++ * uint32_t x86_mcinfo_nentries(struct mc_info *mi);
++ */
++#define x86_mcinfo_nentries(_mi) \
++ (_mi)->mi_nentries
++/* Prototype:
++ * struct mcinfo_common *x86_mcinfo_first(struct mc_info *mi);
++ */
++#define x86_mcinfo_first(_mi) \
++ (struct mcinfo_common *)((_mi)->mi_data)
++/* Prototype:
++ * struct mcinfo_common *x86_mcinfo_next(struct mcinfo_common *mic);
++ */
++#define x86_mcinfo_next(_mic) \
++ (struct mcinfo_common *)((uint8_t *)(_mic) + (_mic)->size)
++
++/* Prototype:
++ * void x86_mcinfo_lookup(void *ret, struct mc_info *mi, uint16_t type);
++ */
++#define x86_mcinfo_lookup(_ret, _mi, _type) \
++ do { \
++ uint32_t found, i; \
++ struct mcinfo_common *_mic; \
++ \
++ found = 0; \
++ (_ret) = NULL; \
++ if (_mi == NULL) break; \
++ _mic = x86_mcinfo_first(_mi); \
++ for (i = 0; i < x86_mcinfo_nentries(_mi); i++) { \
++ if (_mic->type == (_type)) { \
++ found = 1; \
++ break; \
++ } \
++ _mic = x86_mcinfo_next(_mic); \
++ } \
++ (_ret) = found ? _mic : NULL; \
++ } while (0)
++
++
++/* Usecase 1
++ * Register machine check trap callback handler
++ * (already done via "set_trap_table" hypercall)
++ */
++
++/* Usecase 2
++ * Dom0 registers machine check event callback handler
++ * done by EVTCHNOP_bind_virq
++ */
++
++/* Usecase 3
++ * Fetch machine check data from hypervisor.
++ * Note, this hypercall is special, because both Dom0 and DomU must use this.
++ */
++#define XEN_MC_fetch 1
++struct xen_mc_fetch {
++ /* IN/OUT variables. */
++ uint32_t flags;
++
++/* IN: XEN_MC_CORRECTABLE, XEN_MC_TRAP */
++/* OUT: XEN_MC_OK, XEN_MC_FETCHFAILED, XEN_MC_NODATA, XEN_MC_NOMATCH */
++
++ /* OUT variables. */
++ uint32_t fetch_idx; /* only useful for Dom0 for the notify hypercall */
++ struct mc_info mc_info;
++};
++typedef struct xen_mc_fetch xen_mc_fetch_t;
++DEFINE_XEN_GUEST_HANDLE(xen_mc_fetch_t);
++
++
++/* Usecase 4
++ * This tells the hypervisor to notify a DomU about the machine check error
++ */
++#define XEN_MC_notifydomain 2
++struct xen_mc_notifydomain {
++ /* IN variables. */
++ uint16_t mc_domid; /* The unprivileged domain to notify. */
++ uint16_t mc_vcpuid; /* The vcpu in mc_domid to notify.
++ * Usually echo'd value from the fetch hypercall. */
++ uint32_t fetch_idx; /* echo'd value from the fetch hypercall. */
++
++ /* IN/OUT variables. */
++ uint32_t flags;
++
++/* IN: XEN_MC_CORRECTABLE, XEN_MC_TRAP */
++/* OUT: XEN_MC_OK, XEN_MC_CANNOTHANDLE, XEN_MC_NOTDELIVERED, XEN_MC_NOMATCH */
++};
++typedef struct xen_mc_notifydomain xen_mc_notifydomain_t;
++DEFINE_XEN_GUEST_HANDLE(xen_mc_notifydomain_t);
++
++
++struct xen_mc {
++ uint32_t cmd;
++ uint32_t interface_version; /* XEN_MCA_INTERFACE_VERSION */
++ union {
++ struct xen_mc_fetch mc_fetch;
++ struct xen_mc_notifydomain mc_notifydomain;
++ uint8_t pad[MCINFO_HYPERCALLSIZE];
++ } u;
++};
++typedef struct xen_mc xen_mc_t;
++DEFINE_XEN_GUEST_HANDLE(xen_mc_t);
++
++#endif /* __ASSEMBLY__ */
++
++#endif /* __XEN_PUBLIC_ARCH_X86_MCA_H__ */
+Index: head-2008-11-25/include/xen/interface/arch-x86/xen-x86_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/arch-x86/xen-x86_32.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,180 @@
++/******************************************************************************
++ * xen-x86_32.h
++ *
++ * Guest OS interface to x86 32-bit Xen.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2004-2007, K A Fraser
++ */
++
++#ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__
++#define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__
++
++/*
++ * Hypercall interface:
++ * Input: %ebx, %ecx, %edx, %esi, %edi (arguments 1-5)
++ * Output: %eax
++ * Access is via hypercall page (set up by guest loader or via a Xen MSR):
++ * call hypercall_page + hypercall-number * 32
++ * Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx)
++ */
++
++#if __XEN_INTERFACE_VERSION__ < 0x00030203
++/*
++ * Legacy hypercall interface:
++ * As above, except the entry sequence to the hypervisor is:
++ * mov $hypercall-number*32,%eax ; int $0x82
++ */
++#define TRAP_INSTR "int $0x82"
++#endif
++
++/*
++ * These flat segments are in the Xen-private section of every GDT. Since these
++ * are also present in the initial GDT, many OSes will be able to avoid
++ * installing their own GDT.
++ */
++#define FLAT_RING1_CS 0xe019 /* GDT index 259 */
++#define FLAT_RING1_DS 0xe021 /* GDT index 260 */
++#define FLAT_RING1_SS 0xe021 /* GDT index 260 */
++#define FLAT_RING3_CS 0xe02b /* GDT index 261 */
++#define FLAT_RING3_DS 0xe033 /* GDT index 262 */
++#define FLAT_RING3_SS 0xe033 /* GDT index 262 */
++
++#define FLAT_KERNEL_CS FLAT_RING1_CS
++#define FLAT_KERNEL_DS FLAT_RING1_DS
++#define FLAT_KERNEL_SS FLAT_RING1_SS
++#define FLAT_USER_CS FLAT_RING3_CS
++#define FLAT_USER_DS FLAT_RING3_DS
++#define FLAT_USER_SS FLAT_RING3_SS
++
++#define __HYPERVISOR_VIRT_START_PAE 0xF5800000
++#define __MACH2PHYS_VIRT_START_PAE 0xF5800000
++#define __MACH2PHYS_VIRT_END_PAE 0xF6800000
++#define HYPERVISOR_VIRT_START_PAE \
++ mk_unsigned_long(__HYPERVISOR_VIRT_START_PAE)
++#define MACH2PHYS_VIRT_START_PAE \
++ mk_unsigned_long(__MACH2PHYS_VIRT_START_PAE)
++#define MACH2PHYS_VIRT_END_PAE \
++ mk_unsigned_long(__MACH2PHYS_VIRT_END_PAE)
++
++/* Non-PAE bounds are obsolete. */
++#define __HYPERVISOR_VIRT_START_NONPAE 0xFC000000
++#define __MACH2PHYS_VIRT_START_NONPAE 0xFC000000
++#define __MACH2PHYS_VIRT_END_NONPAE 0xFC400000
++#define HYPERVISOR_VIRT_START_NONPAE \
++ mk_unsigned_long(__HYPERVISOR_VIRT_START_NONPAE)
++#define MACH2PHYS_VIRT_START_NONPAE \
++ mk_unsigned_long(__MACH2PHYS_VIRT_START_NONPAE)
++#define MACH2PHYS_VIRT_END_NONPAE \
++ mk_unsigned_long(__MACH2PHYS_VIRT_END_NONPAE)
++
++#define __HYPERVISOR_VIRT_START __HYPERVISOR_VIRT_START_PAE
++#define __MACH2PHYS_VIRT_START __MACH2PHYS_VIRT_START_PAE
++#define __MACH2PHYS_VIRT_END __MACH2PHYS_VIRT_END_PAE
++
++#ifndef HYPERVISOR_VIRT_START
++#define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START)
++#endif
++
++#define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START)
++#define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END)
++#define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2)
++#ifndef machine_to_phys_mapping
++#define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START)
++#endif
++
++/* 32-/64-bit invariability for control interfaces (domctl/sysctl). */
++#if defined(__XEN__) || defined(__XEN_TOOLS__)
++#undef ___DEFINE_XEN_GUEST_HANDLE
++#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
++ typedef struct { type *p; } \
++ __guest_handle_ ## name; \
++ typedef struct { union { type *p; uint64_aligned_t q; }; } \
++ __guest_handle_64_ ## name
++#undef set_xen_guest_handle
++#define set_xen_guest_handle(hnd, val) \
++ do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \
++ (hnd).p = val; \
++ } while ( 0 )
++#define uint64_aligned_t uint64_t __attribute__((aligned(8)))
++#define __XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name
++#define XEN_GUEST_HANDLE_64(name) __XEN_GUEST_HANDLE_64(name)
++#endif
++
++#ifndef __ASSEMBLY__
++
++struct cpu_user_regs {
++ uint32_t ebx;
++ uint32_t ecx;
++ uint32_t edx;
++ uint32_t esi;
++ uint32_t edi;
++ uint32_t ebp;
++ uint32_t eax;
++ uint16_t error_code; /* private */
++ uint16_t entry_vector; /* private */
++ uint32_t eip;
++ uint16_t cs;
++ uint8_t saved_upcall_mask;
++ uint8_t _pad0;
++ uint32_t eflags; /* eflags.IF == !saved_upcall_mask */
++ uint32_t esp;
++ uint16_t ss, _pad1;
++ uint16_t es, _pad2;
++ uint16_t ds, _pad3;
++ uint16_t fs, _pad4;
++ uint16_t gs, _pad5;
++};
++typedef struct cpu_user_regs cpu_user_regs_t;
++DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t);
++
++/*
++ * Page-directory addresses above 4GB do not fit into architectural %cr3.
++ * When accessing %cr3, or equivalent field in vcpu_guest_context, guests
++ * must use the following accessor macros to pack/unpack valid MFNs.
++ */
++#define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20))
++#define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20))
++
++struct arch_vcpu_info {
++ unsigned long cr2;
++ unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */
++};
++typedef struct arch_vcpu_info arch_vcpu_info_t;
++
++struct xen_callback {
++ unsigned long cs;
++ unsigned long eip;
++};
++typedef struct xen_callback xen_callback_t;
++
++#endif /* !__ASSEMBLY__ */
++
++#endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/arch-x86/xen-x86_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/arch-x86/xen-x86_64.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,212 @@
++/******************************************************************************
++ * xen-x86_64.h
++ *
++ * Guest OS interface to x86 64-bit Xen.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2004-2006, K A Fraser
++ */
++
++#ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_64_H__
++#define __XEN_PUBLIC_ARCH_X86_XEN_X86_64_H__
++
++/*
++ * Hypercall interface:
++ * Input: %rdi, %rsi, %rdx, %r10, %r8 (arguments 1-5)
++ * Output: %rax
++ * Access is via hypercall page (set up by guest loader or via a Xen MSR):
++ * call hypercall_page + hypercall-number * 32
++ * Clobbered: argument registers (e.g., 2-arg hypercall clobbers %rdi,%rsi)
++ */
++
++#if __XEN_INTERFACE_VERSION__ < 0x00030203
++/*
++ * Legacy hypercall interface:
++ * As above, except the entry sequence to the hypervisor is:
++ * mov $hypercall-number*32,%eax ; syscall
++ * Clobbered: %rcx, %r11, argument registers (as above)
++ */
++#define TRAP_INSTR "syscall"
++#endif
++
++/*
++ * 64-bit segment selectors
++ * These flat segments are in the Xen-private section of every GDT. Since these
++ * are also present in the initial GDT, many OSes will be able to avoid
++ * installing their own GDT.
++ */
++
++#define FLAT_RING3_CS32 0xe023 /* GDT index 260 */
++#define FLAT_RING3_CS64 0xe033 /* GDT index 261 */
++#define FLAT_RING3_DS32 0xe02b /* GDT index 262 */
++#define FLAT_RING3_DS64 0x0000 /* NULL selector */
++#define FLAT_RING3_SS32 0xe02b /* GDT index 262 */
++#define FLAT_RING3_SS64 0xe02b /* GDT index 262 */
++
++#define FLAT_KERNEL_DS64 FLAT_RING3_DS64
++#define FLAT_KERNEL_DS32 FLAT_RING3_DS32
++#define FLAT_KERNEL_DS FLAT_KERNEL_DS64
++#define FLAT_KERNEL_CS64 FLAT_RING3_CS64
++#define FLAT_KERNEL_CS32 FLAT_RING3_CS32
++#define FLAT_KERNEL_CS FLAT_KERNEL_CS64
++#define FLAT_KERNEL_SS64 FLAT_RING3_SS64
++#define FLAT_KERNEL_SS32 FLAT_RING3_SS32
++#define FLAT_KERNEL_SS FLAT_KERNEL_SS64
++
++#define FLAT_USER_DS64 FLAT_RING3_DS64
++#define FLAT_USER_DS32 FLAT_RING3_DS32
++#define FLAT_USER_DS FLAT_USER_DS64
++#define FLAT_USER_CS64 FLAT_RING3_CS64
++#define FLAT_USER_CS32 FLAT_RING3_CS32
++#define FLAT_USER_CS FLAT_USER_CS64
++#define FLAT_USER_SS64 FLAT_RING3_SS64
++#define FLAT_USER_SS32 FLAT_RING3_SS32
++#define FLAT_USER_SS FLAT_USER_SS64
++
++#define __HYPERVISOR_VIRT_START 0xFFFF800000000000
++#define __HYPERVISOR_VIRT_END 0xFFFF880000000000
++#define __MACH2PHYS_VIRT_START 0xFFFF800000000000
++#define __MACH2PHYS_VIRT_END 0xFFFF804000000000
++
++#ifndef HYPERVISOR_VIRT_START
++#define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START)
++#define HYPERVISOR_VIRT_END mk_unsigned_long(__HYPERVISOR_VIRT_END)
++#endif
++
++#define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START)
++#define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END)
++#define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>3)
++#ifndef machine_to_phys_mapping
++#define machine_to_phys_mapping ((unsigned long *)HYPERVISOR_VIRT_START)
++#endif
++
++/*
++ * int HYPERVISOR_set_segment_base(unsigned int which, unsigned long base)
++ * @which == SEGBASE_* ; @base == 64-bit base address
++ * Returns 0 on success.
++ */
++#define SEGBASE_FS 0
++#define SEGBASE_GS_USER 1
++#define SEGBASE_GS_KERNEL 2
++#define SEGBASE_GS_USER_SEL 3 /* Set user %gs specified in base[15:0] */
++
++/*
++ * int HYPERVISOR_iret(void)
++ * All arguments are on the kernel stack, in the following format.
++ * Never returns if successful. Current kernel context is lost.
++ * The saved CS is mapped as follows:
++ * RING0 -> RING3 kernel mode.
++ * RING1 -> RING3 kernel mode.
++ * RING2 -> RING3 kernel mode.
++ * RING3 -> RING3 user mode.
++ * However RING0 indicates that the guest kernel should return to iteself
++ * directly with
++ * orb $3,1*8(%rsp)
++ * iretq
++ * If flags contains VGCF_in_syscall:
++ * Restore RAX, RIP, RFLAGS, RSP.
++ * Discard R11, RCX, CS, SS.
++ * Otherwise:
++ * Restore RAX, R11, RCX, CS:RIP, RFLAGS, SS:RSP.
++ * All other registers are saved on hypercall entry and restored to user.
++ */
++/* Guest exited in SYSCALL context? Return to guest with SYSRET? */
++#define _VGCF_in_syscall 8
++#define VGCF_in_syscall (1<<_VGCF_in_syscall)
++#define VGCF_IN_SYSCALL VGCF_in_syscall
++
++#ifndef __ASSEMBLY__
++
++struct iret_context {
++ /* Top of stack (%rsp at point of hypercall). */
++ uint64_t rax, r11, rcx, flags, rip, cs, rflags, rsp, ss;
++ /* Bottom of iret stack frame. */
++};
++
++#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
++/* Anonymous union includes both 32- and 64-bit names (e.g., eax/rax). */
++#define __DECL_REG(name) union { \
++ uint64_t r ## name, e ## name; \
++ uint32_t _e ## name; \
++}
++#else
++/* Non-gcc sources must always use the proper 64-bit name (e.g., rax). */
++#define __DECL_REG(name) uint64_t r ## name
++#endif
++
++struct cpu_user_regs {
++ uint64_t r15;
++ uint64_t r14;
++ uint64_t r13;
++ uint64_t r12;
++ __DECL_REG(bp);
++ __DECL_REG(bx);
++ uint64_t r11;
++ uint64_t r10;
++ uint64_t r9;
++ uint64_t r8;
++ __DECL_REG(ax);
++ __DECL_REG(cx);
++ __DECL_REG(dx);
++ __DECL_REG(si);
++ __DECL_REG(di);
++ uint32_t error_code; /* private */
++ uint32_t entry_vector; /* private */
++ __DECL_REG(ip);
++ uint16_t cs, _pad0[1];
++ uint8_t saved_upcall_mask;
++ uint8_t _pad1[3];
++ __DECL_REG(flags); /* rflags.IF == !saved_upcall_mask */
++ __DECL_REG(sp);
++ uint16_t ss, _pad2[3];
++ uint16_t es, _pad3[3];
++ uint16_t ds, _pad4[3];
++ uint16_t fs, _pad5[3]; /* Non-zero => takes precedence over fs_base. */
++ uint16_t gs, _pad6[3]; /* Non-zero => takes precedence over gs_base_usr. */
++};
++typedef struct cpu_user_regs cpu_user_regs_t;
++DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t);
++
++#undef __DECL_REG
++
++#define xen_pfn_to_cr3(pfn) ((unsigned long)(pfn) << 12)
++#define xen_cr3_to_pfn(cr3) ((unsigned long)(cr3) >> 12)
++
++struct arch_vcpu_info {
++ unsigned long cr2;
++ unsigned long pad; /* sizeof(vcpu_info_t) == 64 */
++};
++typedef struct arch_vcpu_info arch_vcpu_info_t;
++
++typedef unsigned long xen_callback_t;
++
++#endif /* !__ASSEMBLY__ */
++
++#endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_64_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/arch-x86/xen.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/arch-x86/xen.h 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,204 @@
++/******************************************************************************
++ * arch-x86/xen.h
++ *
++ * Guest OS interface to x86 Xen.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2004-2006, K A Fraser
++ */
++
++#include "../xen.h"
++
++#ifndef __XEN_PUBLIC_ARCH_X86_XEN_H__
++#define __XEN_PUBLIC_ARCH_X86_XEN_H__
++
++/* Structural guest handles introduced in 0x00030201. */
++#if __XEN_INTERFACE_VERSION__ >= 0x00030201
++#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
++ typedef struct { type *p; } __guest_handle_ ## name
++#else
++#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
++ typedef type * __guest_handle_ ## name
++#endif
++
++#define __DEFINE_XEN_GUEST_HANDLE(name, type) \
++ ___DEFINE_XEN_GUEST_HANDLE(name, type); \
++ ___DEFINE_XEN_GUEST_HANDLE(const_##name, const type)
++#define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name)
++#define __XEN_GUEST_HANDLE(name) __guest_handle_ ## name
++#define XEN_GUEST_HANDLE(name) __XEN_GUEST_HANDLE(name)
++#define set_xen_guest_handle(hnd, val) do { (hnd).p = val; } while (0)
++#ifdef __XEN_TOOLS__
++#define get_xen_guest_handle(val, hnd) do { val = (hnd).p; } while (0)
++#endif
++
++#if defined(__i386__)
++#include "xen-x86_32.h"
++#elif defined(__x86_64__)
++#include "xen-x86_64.h"
++#endif
++
++#ifndef __ASSEMBLY__
++typedef unsigned long xen_pfn_t;
++#define PRI_xen_pfn "lx"
++#endif
++
++/*
++ * SEGMENT DESCRIPTOR TABLES
++ */
++/*
++ * A number of GDT entries are reserved by Xen. These are not situated at the
++ * start of the GDT because some stupid OSes export hard-coded selector values
++ * in their ABI. These hard-coded values are always near the start of the GDT,
++ * so Xen places itself out of the way, at the far end of the GDT.
++ */
++#define FIRST_RESERVED_GDT_PAGE 14
++#define FIRST_RESERVED_GDT_BYTE (FIRST_RESERVED_GDT_PAGE * 4096)
++#define FIRST_RESERVED_GDT_ENTRY (FIRST_RESERVED_GDT_BYTE / 8)
++
++/* Maximum number of virtual CPUs in multi-processor guests. */
++#define MAX_VIRT_CPUS 32
++
++
++/* Machine check support */
++#include "xen-mca.h"
++
++#ifndef __ASSEMBLY__
++
++typedef unsigned long xen_ulong_t;
++
++/*
++ * Send an array of these to HYPERVISOR_set_trap_table().
++ * The privilege level specifies which modes may enter a trap via a software
++ * interrupt. On x86/64, since rings 1 and 2 are unavailable, we allocate
++ * privilege levels as follows:
++ * Level == 0: Noone may enter
++ * Level == 1: Kernel may enter
++ * Level == 2: Kernel may enter
++ * Level == 3: Everyone may enter
++ */
++#define TI_GET_DPL(_ti) ((_ti)->flags & 3)
++#define TI_GET_IF(_ti) ((_ti)->flags & 4)
++#define TI_SET_DPL(_ti,_dpl) ((_ti)->flags |= (_dpl))
++#define TI_SET_IF(_ti,_if) ((_ti)->flags |= ((!!(_if))<<2))
++struct trap_info {
++ uint8_t vector; /* exception vector */
++ uint8_t flags; /* 0-3: privilege level; 4: clear event enable? */
++ uint16_t cs; /* code selector */
++ unsigned long address; /* code offset */
++};
++typedef struct trap_info trap_info_t;
++DEFINE_XEN_GUEST_HANDLE(trap_info_t);
++
++typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */
++
++/*
++ * The following is all CPU context. Note that the fpu_ctxt block is filled
++ * in by FXSAVE if the CPU has feature FXSR; otherwise FSAVE is used.
++ */
++struct vcpu_guest_context {
++ /* FPU registers come first so they can be aligned for FXSAVE/FXRSTOR. */
++ struct { char x[512]; } fpu_ctxt; /* User-level FPU registers */
++#define VGCF_I387_VALID (1<<0)
++#define VGCF_IN_KERNEL (1<<2)
++#define _VGCF_i387_valid 0
++#define VGCF_i387_valid (1<<_VGCF_i387_valid)
++#define _VGCF_in_kernel 2
++#define VGCF_in_kernel (1<<_VGCF_in_kernel)
++#define _VGCF_failsafe_disables_events 3
++#define VGCF_failsafe_disables_events (1<<_VGCF_failsafe_disables_events)
++#define _VGCF_syscall_disables_events 4
++#define VGCF_syscall_disables_events (1<<_VGCF_syscall_disables_events)
++#define _VGCF_online 5
++#define VGCF_online (1<<_VGCF_online)
++ unsigned long flags; /* VGCF_* flags */
++ struct cpu_user_regs user_regs; /* User-level CPU registers */
++ struct trap_info trap_ctxt[256]; /* Virtual IDT */
++ unsigned long ldt_base, ldt_ents; /* LDT (linear address, # ents) */
++ unsigned long gdt_frames[16], gdt_ents; /* GDT (machine frames, # ents) */
++ unsigned long kernel_ss, kernel_sp; /* Virtual TSS (only SS1/SP1) */
++ /* NB. User pagetable on x86/64 is placed in ctrlreg[1]. */
++ unsigned long ctrlreg[8]; /* CR0-CR7 (control registers) */
++ unsigned long debugreg[8]; /* DB0-DB7 (debug registers) */
++#ifdef __i386__
++ unsigned long event_callback_cs; /* CS:EIP of event callback */
++ unsigned long event_callback_eip;
++ unsigned long failsafe_callback_cs; /* CS:EIP of failsafe callback */
++ unsigned long failsafe_callback_eip;
++#else
++ unsigned long event_callback_eip;
++ unsigned long failsafe_callback_eip;
++#ifdef __XEN__
++ union {
++ unsigned long syscall_callback_eip;
++ struct {
++ unsigned int event_callback_cs; /* compat CS of event cb */
++ unsigned int failsafe_callback_cs; /* compat CS of failsafe cb */
++ };
++ };
++#else
++ unsigned long syscall_callback_eip;
++#endif
++#endif
++ unsigned long vm_assist; /* VMASST_TYPE_* bitmap */
++#ifdef __x86_64__
++ /* Segment base addresses. */
++ uint64_t fs_base;
++ uint64_t gs_base_kernel;
++ uint64_t gs_base_user;
++#endif
++};
++typedef struct vcpu_guest_context vcpu_guest_context_t;
++DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t);
++
++struct arch_shared_info {
++ unsigned long max_pfn; /* max pfn that appears in table */
++ /* Frame containing list of mfns containing list of mfns containing p2m. */
++ xen_pfn_t pfn_to_mfn_frame_list_list;
++ unsigned long nmi_reason;
++ uint64_t pad[32];
++};
++typedef struct arch_shared_info arch_shared_info_t;
++
++#endif /* !__ASSEMBLY__ */
++
++/*
++ * Prefix forces emulation of some non-trapping instructions.
++ * Currently only CPUID.
++ */
++#ifdef __ASSEMBLY__
++#define XEN_EMULATE_PREFIX .byte 0x0f,0x0b,0x78,0x65,0x6e ;
++#define XEN_CPUID XEN_EMULATE_PREFIX cpuid
++#else
++#define XEN_EMULATE_PREFIX ".byte 0x0f,0x0b,0x78,0x65,0x6e ; "
++#define XEN_CPUID XEN_EMULATE_PREFIX "cpuid"
++#endif
++
++#endif /* __XEN_PUBLIC_ARCH_X86_XEN_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/arch-x86_32.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/arch-x86_32.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,27 @@
++/******************************************************************************
++ * arch-x86_32.h
++ *
++ * Guest OS interface to x86 32-bit Xen.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2004-2006, K A Fraser
++ */
++
++#include "arch-x86/xen.h"
+Index: head-2008-11-25/include/xen/interface/arch-x86_64.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/arch-x86_64.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,27 @@
++/******************************************************************************
++ * arch-x86_64.h
++ *
++ * Guest OS interface to x86 64-bit Xen.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2004-2006, K A Fraser
++ */
++
++#include "arch-x86/xen.h"
+Index: head-2008-11-25/include/xen/interface/dom0_ops.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/dom0_ops.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,120 @@
++/******************************************************************************
++ * dom0_ops.h
++ *
++ * Process command requests from domain-0 guest OS.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2002-2003, B Dragovic
++ * Copyright (c) 2002-2006, K Fraser
++ */
++
++#ifndef __XEN_PUBLIC_DOM0_OPS_H__
++#define __XEN_PUBLIC_DOM0_OPS_H__
++
++#include "xen.h"
++#include "platform.h"
++
++#if __XEN_INTERFACE_VERSION__ >= 0x00030204
++#error "dom0_ops.h is a compatibility interface only"
++#endif
++
++#define DOM0_INTERFACE_VERSION XENPF_INTERFACE_VERSION
++
++#define DOM0_SETTIME XENPF_settime
++#define dom0_settime xenpf_settime
++#define dom0_settime_t xenpf_settime_t
++
++#define DOM0_ADD_MEMTYPE XENPF_add_memtype
++#define dom0_add_memtype xenpf_add_memtype
++#define dom0_add_memtype_t xenpf_add_memtype_t
++
++#define DOM0_DEL_MEMTYPE XENPF_del_memtype
++#define dom0_del_memtype xenpf_del_memtype
++#define dom0_del_memtype_t xenpf_del_memtype_t
++
++#define DOM0_READ_MEMTYPE XENPF_read_memtype
++#define dom0_read_memtype xenpf_read_memtype
++#define dom0_read_memtype_t xenpf_read_memtype_t
++
++#define DOM0_MICROCODE XENPF_microcode_update
++#define dom0_microcode xenpf_microcode_update
++#define dom0_microcode_t xenpf_microcode_update_t
++
++#define DOM0_PLATFORM_QUIRK XENPF_platform_quirk
++#define dom0_platform_quirk xenpf_platform_quirk
++#define dom0_platform_quirk_t xenpf_platform_quirk_t
++
++typedef uint64_t cpumap_t;
++
++/* Unsupported legacy operation -- defined for API compatibility. */
++#define DOM0_MSR 15
++struct dom0_msr {
++ /* IN variables. */
++ uint32_t write;
++ cpumap_t cpu_mask;
++ uint32_t msr;
++ uint32_t in1;
++ uint32_t in2;
++ /* OUT variables. */
++ uint32_t out1;
++ uint32_t out2;
++};
++typedef struct dom0_msr dom0_msr_t;
++DEFINE_XEN_GUEST_HANDLE(dom0_msr_t);
++
++/* Unsupported legacy operation -- defined for API compatibility. */
++#define DOM0_PHYSICAL_MEMORY_MAP 40
++struct dom0_memory_map_entry {
++ uint64_t start, end;
++ uint32_t flags; /* reserved */
++ uint8_t is_ram;
++};
++typedef struct dom0_memory_map_entry dom0_memory_map_entry_t;
++DEFINE_XEN_GUEST_HANDLE(dom0_memory_map_entry_t);
++
++struct dom0_op {
++ uint32_t cmd;
++ uint32_t interface_version; /* DOM0_INTERFACE_VERSION */
++ union {
++ struct dom0_msr msr;
++ struct dom0_settime settime;
++ struct dom0_add_memtype add_memtype;
++ struct dom0_del_memtype del_memtype;
++ struct dom0_read_memtype read_memtype;
++ struct dom0_microcode microcode;
++ struct dom0_platform_quirk platform_quirk;
++ struct dom0_memory_map_entry physical_memory_map;
++ uint8_t pad[128];
++ } u;
++};
++typedef struct dom0_op dom0_op_t;
++DEFINE_XEN_GUEST_HANDLE(dom0_op_t);
++
++#endif /* __XEN_PUBLIC_DOM0_OPS_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/domctl.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/domctl.h 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,680 @@
++/******************************************************************************
++ * domctl.h
++ *
++ * Domain management operations. For use by node control stack.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2002-2003, B Dragovic
++ * Copyright (c) 2002-2006, K Fraser
++ */
++
++#ifndef __XEN_PUBLIC_DOMCTL_H__
++#define __XEN_PUBLIC_DOMCTL_H__
++
++#if !defined(__XEN__) && !defined(__XEN_TOOLS__)
++#error "domctl operations are intended for use by node control tools only"
++#endif
++
++#include "xen.h"
++
++#define XEN_DOMCTL_INTERFACE_VERSION 0x00000005
++
++struct xenctl_cpumap {
++ XEN_GUEST_HANDLE_64(uint8) bitmap;
++ uint32_t nr_cpus;
++};
++
++/*
++ * NB. xen_domctl.domain is an IN/OUT parameter for this operation.
++ * If it is specified as zero, an id is auto-allocated and returned.
++ */
++#define XEN_DOMCTL_createdomain 1
++struct xen_domctl_createdomain {
++ /* IN parameters */
++ uint32_t ssidref;
++ xen_domain_handle_t handle;
++ /* Is this an HVM guest (as opposed to a PV guest)? */
++#define _XEN_DOMCTL_CDF_hvm_guest 0
++#define XEN_DOMCTL_CDF_hvm_guest (1U<<_XEN_DOMCTL_CDF_hvm_guest)
++ /* Use hardware-assisted paging if available? */
++#define _XEN_DOMCTL_CDF_hap 1
++#define XEN_DOMCTL_CDF_hap (1U<<_XEN_DOMCTL_CDF_hap)
++ uint32_t flags;
++};
++typedef struct xen_domctl_createdomain xen_domctl_createdomain_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_createdomain_t);
++
++#define XEN_DOMCTL_destroydomain 2
++#define XEN_DOMCTL_pausedomain 3
++#define XEN_DOMCTL_unpausedomain 4
++#define XEN_DOMCTL_resumedomain 27
++
++#define XEN_DOMCTL_getdomaininfo 5
++struct xen_domctl_getdomaininfo {
++ /* OUT variables. */
++ domid_t domain; /* Also echoed in domctl.domain */
++ /* Domain is scheduled to die. */
++#define _XEN_DOMINF_dying 0
++#define XEN_DOMINF_dying (1U<<_XEN_DOMINF_dying)
++ /* Domain is an HVM guest (as opposed to a PV guest). */
++#define _XEN_DOMINF_hvm_guest 1
++#define XEN_DOMINF_hvm_guest (1U<<_XEN_DOMINF_hvm_guest)
++ /* The guest OS has shut down. */
++#define _XEN_DOMINF_shutdown 2
++#define XEN_DOMINF_shutdown (1U<<_XEN_DOMINF_shutdown)
++ /* Currently paused by control software. */
++#define _XEN_DOMINF_paused 3
++#define XEN_DOMINF_paused (1U<<_XEN_DOMINF_paused)
++ /* Currently blocked pending an event. */
++#define _XEN_DOMINF_blocked 4
++#define XEN_DOMINF_blocked (1U<<_XEN_DOMINF_blocked)
++ /* Domain is currently running. */
++#define _XEN_DOMINF_running 5
++#define XEN_DOMINF_running (1U<<_XEN_DOMINF_running)
++ /* Being debugged. */
++#define _XEN_DOMINF_debugged 6
++#define XEN_DOMINF_debugged (1U<<_XEN_DOMINF_debugged)
++ /* CPU to which this domain is bound. */
++#define XEN_DOMINF_cpumask 255
++#define XEN_DOMINF_cpushift 8
++ /* XEN_DOMINF_shutdown guest-supplied code. */
++#define XEN_DOMINF_shutdownmask 255
++#define XEN_DOMINF_shutdownshift 16
++ uint32_t flags; /* XEN_DOMINF_* */
++ uint64_aligned_t tot_pages;
++ uint64_aligned_t max_pages;
++ uint64_aligned_t shared_info_frame; /* GMFN of shared_info struct */
++ uint64_aligned_t cpu_time;
++ uint32_t nr_online_vcpus; /* Number of VCPUs currently online. */
++ uint32_t max_vcpu_id; /* Maximum VCPUID in use by this domain. */
++ uint32_t ssidref;
++ xen_domain_handle_t handle;
++};
++typedef struct xen_domctl_getdomaininfo xen_domctl_getdomaininfo_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_getdomaininfo_t);
++
++
++#define XEN_DOMCTL_getmemlist 6
++struct xen_domctl_getmemlist {
++ /* IN variables. */
++ /* Max entries to write to output buffer. */
++ uint64_aligned_t max_pfns;
++ /* Start index in guest's page list. */
++ uint64_aligned_t start_pfn;
++ XEN_GUEST_HANDLE_64(uint64) buffer;
++ /* OUT variables. */
++ uint64_aligned_t num_pfns;
++};
++typedef struct xen_domctl_getmemlist xen_domctl_getmemlist_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_getmemlist_t);
++
++
++#define XEN_DOMCTL_getpageframeinfo 7
++
++#define XEN_DOMCTL_PFINFO_LTAB_SHIFT 28
++#define XEN_DOMCTL_PFINFO_NOTAB (0x0U<<28)
++#define XEN_DOMCTL_PFINFO_L1TAB (0x1U<<28)
++#define XEN_DOMCTL_PFINFO_L2TAB (0x2U<<28)
++#define XEN_DOMCTL_PFINFO_L3TAB (0x3U<<28)
++#define XEN_DOMCTL_PFINFO_L4TAB (0x4U<<28)
++#define XEN_DOMCTL_PFINFO_LTABTYPE_MASK (0x7U<<28)
++#define XEN_DOMCTL_PFINFO_LPINTAB (0x1U<<31)
++#define XEN_DOMCTL_PFINFO_XTAB (0xfU<<28) /* invalid page */
++#define XEN_DOMCTL_PFINFO_LTAB_MASK (0xfU<<28)
++
++struct xen_domctl_getpageframeinfo {
++ /* IN variables. */
++ uint64_aligned_t gmfn; /* GMFN to query */
++ /* OUT variables. */
++ /* Is the page PINNED to a type? */
++ uint32_t type; /* see above type defs */
++};
++typedef struct xen_domctl_getpageframeinfo xen_domctl_getpageframeinfo_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_getpageframeinfo_t);
++
++
++#define XEN_DOMCTL_getpageframeinfo2 8
++struct xen_domctl_getpageframeinfo2 {
++ /* IN variables. */
++ uint64_aligned_t num;
++ /* IN/OUT variables. */
++ XEN_GUEST_HANDLE_64(uint32) array;
++};
++typedef struct xen_domctl_getpageframeinfo2 xen_domctl_getpageframeinfo2_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_getpageframeinfo2_t);
++
++
++/*
++ * Control shadow pagetables operation
++ */
++#define XEN_DOMCTL_shadow_op 10
++
++/* Disable shadow mode. */
++#define XEN_DOMCTL_SHADOW_OP_OFF 0
++
++/* Enable shadow mode (mode contains ORed XEN_DOMCTL_SHADOW_ENABLE_* flags). */
++#define XEN_DOMCTL_SHADOW_OP_ENABLE 32
++
++/* Log-dirty bitmap operations. */
++ /* Return the bitmap and clean internal copy for next round. */
++#define XEN_DOMCTL_SHADOW_OP_CLEAN 11
++ /* Return the bitmap but do not modify internal copy. */
++#define XEN_DOMCTL_SHADOW_OP_PEEK 12
++
++/* Memory allocation accessors. */
++#define XEN_DOMCTL_SHADOW_OP_GET_ALLOCATION 30
++#define XEN_DOMCTL_SHADOW_OP_SET_ALLOCATION 31
++
++/* Legacy enable operations. */
++ /* Equiv. to ENABLE with no mode flags. */
++#define XEN_DOMCTL_SHADOW_OP_ENABLE_TEST 1
++ /* Equiv. to ENABLE with mode flag ENABLE_LOG_DIRTY. */
++#define XEN_DOMCTL_SHADOW_OP_ENABLE_LOGDIRTY 2
++ /* Equiv. to ENABLE with mode flags ENABLE_REFCOUNT and ENABLE_TRANSLATE. */
++#define XEN_DOMCTL_SHADOW_OP_ENABLE_TRANSLATE 3
++
++/* Mode flags for XEN_DOMCTL_SHADOW_OP_ENABLE. */
++ /*
++ * Shadow pagetables are refcounted: guest does not use explicit mmu
++ * operations nor write-protect its pagetables.
++ */
++#define XEN_DOMCTL_SHADOW_ENABLE_REFCOUNT (1 << 1)
++ /*
++ * Log pages in a bitmap as they are dirtied.
++ * Used for live relocation to determine which pages must be re-sent.
++ */
++#define XEN_DOMCTL_SHADOW_ENABLE_LOG_DIRTY (1 << 2)
++ /*
++ * Automatically translate GPFNs into MFNs.
++ */
++#define XEN_DOMCTL_SHADOW_ENABLE_TRANSLATE (1 << 3)
++ /*
++ * Xen does not steal virtual address space from the guest.
++ * Requires HVM support.
++ */
++#define XEN_DOMCTL_SHADOW_ENABLE_EXTERNAL (1 << 4)
++
++struct xen_domctl_shadow_op_stats {
++ uint32_t fault_count;
++ uint32_t dirty_count;
++};
++typedef struct xen_domctl_shadow_op_stats xen_domctl_shadow_op_stats_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_shadow_op_stats_t);
++
++struct xen_domctl_shadow_op {
++ /* IN variables. */
++ uint32_t op; /* XEN_DOMCTL_SHADOW_OP_* */
++
++ /* OP_ENABLE */
++ uint32_t mode; /* XEN_DOMCTL_SHADOW_ENABLE_* */
++
++ /* OP_GET_ALLOCATION / OP_SET_ALLOCATION */
++ uint32_t mb; /* Shadow memory allocation in MB */
++
++ /* OP_PEEK / OP_CLEAN */
++ XEN_GUEST_HANDLE_64(uint8) dirty_bitmap;
++ uint64_aligned_t pages; /* Size of buffer. Updated with actual size. */
++ struct xen_domctl_shadow_op_stats stats;
++};
++typedef struct xen_domctl_shadow_op xen_domctl_shadow_op_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_shadow_op_t);
++
++
++#define XEN_DOMCTL_max_mem 11
++struct xen_domctl_max_mem {
++ /* IN variables. */
++ uint64_aligned_t max_memkb;
++};
++typedef struct xen_domctl_max_mem xen_domctl_max_mem_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_max_mem_t);
++
++
++#define XEN_DOMCTL_setvcpucontext 12
++#define XEN_DOMCTL_getvcpucontext 13
++struct xen_domctl_vcpucontext {
++ uint32_t vcpu; /* IN */
++ XEN_GUEST_HANDLE_64(vcpu_guest_context_t) ctxt; /* IN/OUT */
++};
++typedef struct xen_domctl_vcpucontext xen_domctl_vcpucontext_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_vcpucontext_t);
++
++
++#define XEN_DOMCTL_getvcpuinfo 14
++struct xen_domctl_getvcpuinfo {
++ /* IN variables. */
++ uint32_t vcpu;
++ /* OUT variables. */
++ uint8_t online; /* currently online (not hotplugged)? */
++ uint8_t blocked; /* blocked waiting for an event? */
++ uint8_t running; /* currently scheduled on its CPU? */
++ uint64_aligned_t cpu_time; /* total cpu time consumed (ns) */
++ uint32_t cpu; /* current mapping */
++};
++typedef struct xen_domctl_getvcpuinfo xen_domctl_getvcpuinfo_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_getvcpuinfo_t);
++
++
++/* Get/set which physical cpus a vcpu can execute on. */
++#define XEN_DOMCTL_setvcpuaffinity 9
++#define XEN_DOMCTL_getvcpuaffinity 25
++struct xen_domctl_vcpuaffinity {
++ uint32_t vcpu; /* IN */
++ struct xenctl_cpumap cpumap; /* IN/OUT */
++};
++typedef struct xen_domctl_vcpuaffinity xen_domctl_vcpuaffinity_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_vcpuaffinity_t);
++
++
++#define XEN_DOMCTL_max_vcpus 15
++struct xen_domctl_max_vcpus {
++ uint32_t max; /* maximum number of vcpus */
++};
++typedef struct xen_domctl_max_vcpus xen_domctl_max_vcpus_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_max_vcpus_t);
++
++
++#define XEN_DOMCTL_scheduler_op 16
++/* Scheduler types. */
++#define XEN_SCHEDULER_SEDF 4
++#define XEN_SCHEDULER_CREDIT 5
++/* Set or get info? */
++#define XEN_DOMCTL_SCHEDOP_putinfo 0
++#define XEN_DOMCTL_SCHEDOP_getinfo 1
++struct xen_domctl_scheduler_op {
++ uint32_t sched_id; /* XEN_SCHEDULER_* */
++ uint32_t cmd; /* XEN_DOMCTL_SCHEDOP_* */
++ union {
++ struct xen_domctl_sched_sedf {
++ uint64_aligned_t period;
++ uint64_aligned_t slice;
++ uint64_aligned_t latency;
++ uint32_t extratime;
++ uint32_t weight;
++ } sedf;
++ struct xen_domctl_sched_credit {
++ uint16_t weight;
++ uint16_t cap;
++ } credit;
++ } u;
++};
++typedef struct xen_domctl_scheduler_op xen_domctl_scheduler_op_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_scheduler_op_t);
++
++
++#define XEN_DOMCTL_setdomainhandle 17
++struct xen_domctl_setdomainhandle {
++ xen_domain_handle_t handle;
++};
++typedef struct xen_domctl_setdomainhandle xen_domctl_setdomainhandle_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_setdomainhandle_t);
++
++
++#define XEN_DOMCTL_setdebugging 18
++struct xen_domctl_setdebugging {
++ uint8_t enable;
++};
++typedef struct xen_domctl_setdebugging xen_domctl_setdebugging_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_setdebugging_t);
++
++
++#define XEN_DOMCTL_irq_permission 19
++struct xen_domctl_irq_permission {
++ uint8_t pirq;
++ uint8_t allow_access; /* flag to specify enable/disable of IRQ access */
++};
++typedef struct xen_domctl_irq_permission xen_domctl_irq_permission_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_irq_permission_t);
++
++
++#define XEN_DOMCTL_iomem_permission 20
++struct xen_domctl_iomem_permission {
++ uint64_aligned_t first_mfn;/* first page (physical page number) in range */
++ uint64_aligned_t nr_mfns; /* number of pages in range (>0) */
++ uint8_t allow_access; /* allow (!0) or deny (0) access to range? */
++};
++typedef struct xen_domctl_iomem_permission xen_domctl_iomem_permission_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_iomem_permission_t);
++
++
++#define XEN_DOMCTL_ioport_permission 21
++struct xen_domctl_ioport_permission {
++ uint32_t first_port; /* first port int range */
++ uint32_t nr_ports; /* size of port range */
++ uint8_t allow_access; /* allow or deny access to range? */
++};
++typedef struct xen_domctl_ioport_permission xen_domctl_ioport_permission_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_ioport_permission_t);
++
++
++#define XEN_DOMCTL_hypercall_init 22
++struct xen_domctl_hypercall_init {
++ uint64_aligned_t gmfn; /* GMFN to be initialised */
++};
++typedef struct xen_domctl_hypercall_init xen_domctl_hypercall_init_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_hypercall_init_t);
++
++
++#define XEN_DOMCTL_arch_setup 23
++#define _XEN_DOMAINSETUP_hvm_guest 0
++#define XEN_DOMAINSETUP_hvm_guest (1UL<<_XEN_DOMAINSETUP_hvm_guest)
++#define _XEN_DOMAINSETUP_query 1 /* Get parameters (for save) */
++#define XEN_DOMAINSETUP_query (1UL<<_XEN_DOMAINSETUP_query)
++#define _XEN_DOMAINSETUP_sioemu_guest 2
++#define XEN_DOMAINSETUP_sioemu_guest (1UL<<_XEN_DOMAINSETUP_sioemu_guest)
++typedef struct xen_domctl_arch_setup {
++ uint64_aligned_t flags; /* XEN_DOMAINSETUP_* */
++#ifdef __ia64__
++ uint64_aligned_t bp; /* mpaddr of boot param area */
++ uint64_aligned_t maxmem; /* Highest memory address for MDT. */
++ uint64_aligned_t xsi_va; /* Xen shared_info area virtual address. */
++ uint32_t hypercall_imm; /* Break imm for Xen hypercalls. */
++ int8_t vhpt_size_log2; /* Log2 of VHPT size. */
++#endif
++} xen_domctl_arch_setup_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_arch_setup_t);
++
++
++#define XEN_DOMCTL_settimeoffset 24
++struct xen_domctl_settimeoffset {
++ int32_t time_offset_seconds; /* applied to domain wallclock time */
++};
++typedef struct xen_domctl_settimeoffset xen_domctl_settimeoffset_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_settimeoffset_t);
++
++
++#define XEN_DOMCTL_gethvmcontext 33
++#define XEN_DOMCTL_sethvmcontext 34
++typedef struct xen_domctl_hvmcontext {
++ uint32_t size; /* IN/OUT: size of buffer / bytes filled */
++ XEN_GUEST_HANDLE_64(uint8) buffer; /* IN/OUT: data, or call
++ * gethvmcontext with NULL
++ * buffer to get size req'd */
++} xen_domctl_hvmcontext_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_hvmcontext_t);
++
++
++#define XEN_DOMCTL_set_address_size 35
++#define XEN_DOMCTL_get_address_size 36
++typedef struct xen_domctl_address_size {
++ uint32_t size;
++} xen_domctl_address_size_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_address_size_t);
++
++
++#define XEN_DOMCTL_real_mode_area 26
++struct xen_domctl_real_mode_area {
++ uint32_t log; /* log2 of Real Mode Area size */
++};
++typedef struct xen_domctl_real_mode_area xen_domctl_real_mode_area_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_real_mode_area_t);
++
++
++#define XEN_DOMCTL_sendtrigger 28
++#define XEN_DOMCTL_SENDTRIGGER_NMI 0
++#define XEN_DOMCTL_SENDTRIGGER_RESET 1
++#define XEN_DOMCTL_SENDTRIGGER_INIT 2
++struct xen_domctl_sendtrigger {
++ uint32_t trigger; /* IN */
++ uint32_t vcpu; /* IN */
++};
++typedef struct xen_domctl_sendtrigger xen_domctl_sendtrigger_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_sendtrigger_t);
++
++
++/* Assign PCI device to HVM guest. Sets up IOMMU structures. */
++#define XEN_DOMCTL_assign_device 37
++#define XEN_DOMCTL_test_assign_device 45
++#define XEN_DOMCTL_deassign_device 47
++struct xen_domctl_assign_device {
++ uint32_t machine_bdf; /* machine PCI ID of assigned device */
++};
++typedef struct xen_domctl_assign_device xen_domctl_assign_device_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_assign_device_t);
++
++/* Retrieve sibling devices infomation of machine_bdf */
++#define XEN_DOMCTL_get_device_group 50
++struct xen_domctl_get_device_group {
++ uint32_t machine_bdf; /* IN */
++ uint32_t max_sdevs; /* IN */
++ uint32_t num_sdevs; /* OUT */
++ XEN_GUEST_HANDLE_64(uint32) sdev_array; /* OUT */
++};
++typedef struct xen_domctl_get_device_group xen_domctl_get_device_group_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_get_device_group_t);
++
++/* Pass-through interrupts: bind real irq -> hvm devfn. */
++#define XEN_DOMCTL_bind_pt_irq 38
++#define XEN_DOMCTL_unbind_pt_irq 48
++typedef enum pt_irq_type_e {
++ PT_IRQ_TYPE_PCI,
++ PT_IRQ_TYPE_ISA,
++ PT_IRQ_TYPE_MSI,
++} pt_irq_type_t;
++struct xen_domctl_bind_pt_irq {
++ uint32_t machine_irq;
++ pt_irq_type_t irq_type;
++ uint32_t hvm_domid;
++
++ union {
++ struct {
++ uint8_t isa_irq;
++ } isa;
++ struct {
++ uint8_t bus;
++ uint8_t device;
++ uint8_t intx;
++ } pci;
++ struct {
++ uint8_t gvec;
++ uint32_t gflags;
++ } msi;
++ } u;
++};
++typedef struct xen_domctl_bind_pt_irq xen_domctl_bind_pt_irq_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_bind_pt_irq_t);
++
++
++/* Bind machine I/O address range -> HVM address range. */
++#define XEN_DOMCTL_memory_mapping 39
++#define DPCI_ADD_MAPPING 1
++#define DPCI_REMOVE_MAPPING 0
++struct xen_domctl_memory_mapping {
++ uint64_aligned_t first_gfn; /* first page (hvm guest phys page) in range */
++ uint64_aligned_t first_mfn; /* first page (machine page) in range */
++ uint64_aligned_t nr_mfns; /* number of pages in range (>0) */
++ uint32_t add_mapping; /* add or remove mapping */
++ uint32_t padding; /* padding for 64-bit aligned structure */
++};
++typedef struct xen_domctl_memory_mapping xen_domctl_memory_mapping_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_memory_mapping_t);
++
++
++/* Bind machine I/O port range -> HVM I/O port range. */
++#define XEN_DOMCTL_ioport_mapping 40
++struct xen_domctl_ioport_mapping {
++ uint32_t first_gport; /* first guest IO port*/
++ uint32_t first_mport; /* first machine IO port */
++ uint32_t nr_ports; /* size of port range */
++ uint32_t add_mapping; /* add or remove mapping */
++};
++typedef struct xen_domctl_ioport_mapping xen_domctl_ioport_mapping_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_ioport_mapping_t);
++
++
++/*
++ * Pin caching type of RAM space for x86 HVM domU.
++ */
++#define XEN_DOMCTL_pin_mem_cacheattr 41
++/* Caching types: these happen to be the same as x86 MTRR/PAT type codes. */
++#define XEN_DOMCTL_MEM_CACHEATTR_UC 0
++#define XEN_DOMCTL_MEM_CACHEATTR_WC 1
++#define XEN_DOMCTL_MEM_CACHEATTR_WT 4
++#define XEN_DOMCTL_MEM_CACHEATTR_WP 5
++#define XEN_DOMCTL_MEM_CACHEATTR_WB 6
++#define XEN_DOMCTL_MEM_CACHEATTR_UCM 7
++struct xen_domctl_pin_mem_cacheattr {
++ uint64_aligned_t start, end;
++ unsigned int type; /* XEN_DOMCTL_MEM_CACHEATTR_* */
++};
++typedef struct xen_domctl_pin_mem_cacheattr xen_domctl_pin_mem_cacheattr_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_pin_mem_cacheattr_t);
++
++
++#define XEN_DOMCTL_set_ext_vcpucontext 42
++#define XEN_DOMCTL_get_ext_vcpucontext 43
++struct xen_domctl_ext_vcpucontext {
++ /* IN: VCPU that this call applies to. */
++ uint32_t vcpu;
++ /*
++ * SET: Size of struct (IN)
++ * GET: Size of struct (OUT)
++ */
++ uint32_t size;
++#if defined(__i386__) || defined(__x86_64__)
++ /* SYSCALL from 32-bit mode and SYSENTER callback information. */
++ /* NB. SYSCALL from 64-bit mode is contained in vcpu_guest_context_t */
++ uint64_aligned_t syscall32_callback_eip;
++ uint64_aligned_t sysenter_callback_eip;
++ uint16_t syscall32_callback_cs;
++ uint16_t sysenter_callback_cs;
++ uint8_t syscall32_disables_events;
++ uint8_t sysenter_disables_events;
++#endif
++};
++typedef struct xen_domctl_ext_vcpucontext xen_domctl_ext_vcpucontext_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_ext_vcpucontext_t);
++
++/*
++ * Set optimizaton features for a domain
++ */
++#define XEN_DOMCTL_set_opt_feature 44
++struct xen_domctl_set_opt_feature {
++#if defined(__ia64__)
++ struct xen_ia64_opt_feature optf;
++#else
++ /* Make struct non-empty: do not depend on this field name! */
++ uint64_t dummy;
++#endif
++};
++typedef struct xen_domctl_set_opt_feature xen_domctl_set_opt_feature_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_set_opt_feature_t);
++
++/*
++ * Set the target domain for a domain
++ */
++#define XEN_DOMCTL_set_target 46
++struct xen_domctl_set_target {
++ domid_t target;
++};
++typedef struct xen_domctl_set_target xen_domctl_set_target_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_set_target_t);
++
++#if defined(__i386__) || defined(__x86_64__)
++# define XEN_CPUID_INPUT_UNUSED 0xFFFFFFFF
++# define XEN_DOMCTL_set_cpuid 49
++struct xen_domctl_cpuid {
++ unsigned int input[2];
++ unsigned int eax;
++ unsigned int ebx;
++ unsigned int ecx;
++ unsigned int edx;
++};
++typedef struct xen_domctl_cpuid xen_domctl_cpuid_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_cpuid_t);
++#endif
++
++#define XEN_DOMCTL_subscribe 29
++struct xen_domctl_subscribe {
++ uint32_t port; /* IN */
++};
++typedef struct xen_domctl_subscribe xen_domctl_subscribe_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_subscribe_t);
++
++/*
++ * Define the maximum machine address size which should be allocated
++ * to a guest.
++ */
++#define XEN_DOMCTL_set_machine_address_size 51
++#define XEN_DOMCTL_get_machine_address_size 52
++
++/*
++ * Do not inject spurious page faults into this domain.
++ */
++#define XEN_DOMCTL_suppress_spurious_page_faults 53
++
++struct xen_domctl {
++ uint32_t cmd;
++ uint32_t interface_version; /* XEN_DOMCTL_INTERFACE_VERSION */
++ domid_t domain;
++ union {
++ struct xen_domctl_createdomain createdomain;
++ struct xen_domctl_getdomaininfo getdomaininfo;
++ struct xen_domctl_getmemlist getmemlist;
++ struct xen_domctl_getpageframeinfo getpageframeinfo;
++ struct xen_domctl_getpageframeinfo2 getpageframeinfo2;
++ struct xen_domctl_vcpuaffinity vcpuaffinity;
++ struct xen_domctl_shadow_op shadow_op;
++ struct xen_domctl_max_mem max_mem;
++ struct xen_domctl_vcpucontext vcpucontext;
++ struct xen_domctl_getvcpuinfo getvcpuinfo;
++ struct xen_domctl_max_vcpus max_vcpus;
++ struct xen_domctl_scheduler_op scheduler_op;
++ struct xen_domctl_setdomainhandle setdomainhandle;
++ struct xen_domctl_setdebugging setdebugging;
++ struct xen_domctl_irq_permission irq_permission;
++ struct xen_domctl_iomem_permission iomem_permission;
++ struct xen_domctl_ioport_permission ioport_permission;
++ struct xen_domctl_hypercall_init hypercall_init;
++ struct xen_domctl_arch_setup arch_setup;
++ struct xen_domctl_settimeoffset settimeoffset;
++ struct xen_domctl_real_mode_area real_mode_area;
++ struct xen_domctl_hvmcontext hvmcontext;
++ struct xen_domctl_address_size address_size;
++ struct xen_domctl_sendtrigger sendtrigger;
++ struct xen_domctl_get_device_group get_device_group;
++ struct xen_domctl_assign_device assign_device;
++ struct xen_domctl_bind_pt_irq bind_pt_irq;
++ struct xen_domctl_memory_mapping memory_mapping;
++ struct xen_domctl_ioport_mapping ioport_mapping;
++ struct xen_domctl_pin_mem_cacheattr pin_mem_cacheattr;
++ struct xen_domctl_ext_vcpucontext ext_vcpucontext;
++ struct xen_domctl_set_opt_feature set_opt_feature;
++ struct xen_domctl_set_target set_target;
++ struct xen_domctl_subscribe subscribe;
++#if defined(__i386__) || defined(__x86_64__)
++ struct xen_domctl_cpuid cpuid;
++#endif
++ uint8_t pad[128];
++ } u;
++};
++typedef struct xen_domctl xen_domctl_t;
++DEFINE_XEN_GUEST_HANDLE(xen_domctl_t);
++
++#endif /* __XEN_PUBLIC_DOMCTL_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/elfstructs.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/elfstructs.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,527 @@
++#ifndef __XEN_PUBLIC_ELFSTRUCTS_H__
++#define __XEN_PUBLIC_ELFSTRUCTS_H__ 1
++/*
++ * Copyright (c) 1995, 1996 Erik Theisen. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions and the following disclaimer.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The name of the author may not be used to endorse or promote products
++ * derived from this software without specific prior written permission
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
++ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
++ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
++ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
++ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
++ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++typedef uint8_t Elf_Byte;
++
++typedef uint32_t Elf32_Addr; /* Unsigned program address */
++typedef uint32_t Elf32_Off; /* Unsigned file offset */
++typedef int32_t Elf32_Sword; /* Signed large integer */
++typedef uint32_t Elf32_Word; /* Unsigned large integer */
++typedef uint16_t Elf32_Half; /* Unsigned medium integer */
++
++typedef uint64_t Elf64_Addr;
++typedef uint64_t Elf64_Off;
++typedef int32_t Elf64_Shalf;
++
++typedef int32_t Elf64_Sword;
++typedef uint32_t Elf64_Word;
++
++typedef int64_t Elf64_Sxword;
++typedef uint64_t Elf64_Xword;
++
++typedef uint32_t Elf64_Half;
++typedef uint16_t Elf64_Quarter;
++
++/*
++ * e_ident[] identification indexes
++ * See http://www.caldera.com/developers/gabi/2000-07-17/ch4.eheader.html
++ */
++#define EI_MAG0 0 /* file ID */
++#define EI_MAG1 1 /* file ID */
++#define EI_MAG2 2 /* file ID */
++#define EI_MAG3 3 /* file ID */
++#define EI_CLASS 4 /* file class */
++#define EI_DATA 5 /* data encoding */
++#define EI_VERSION 6 /* ELF header version */
++#define EI_OSABI 7 /* OS/ABI ID */
++#define EI_ABIVERSION 8 /* ABI version */
++#define EI_PAD 9 /* start of pad bytes */
++#define EI_NIDENT 16 /* Size of e_ident[] */
++
++/* e_ident[] magic number */
++#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */
++#define ELFMAG1 'E' /* e_ident[EI_MAG1] */
++#define ELFMAG2 'L' /* e_ident[EI_MAG2] */
++#define ELFMAG3 'F' /* e_ident[EI_MAG3] */
++#define ELFMAG "\177ELF" /* magic */
++#define SELFMAG 4 /* size of magic */
++
++/* e_ident[] file class */
++#define ELFCLASSNONE 0 /* invalid */
++#define ELFCLASS32 1 /* 32-bit objs */
++#define ELFCLASS64 2 /* 64-bit objs */
++#define ELFCLASSNUM 3 /* number of classes */
++
++/* e_ident[] data encoding */
++#define ELFDATANONE 0 /* invalid */
++#define ELFDATA2LSB 1 /* Little-Endian */
++#define ELFDATA2MSB 2 /* Big-Endian */
++#define ELFDATANUM 3 /* number of data encode defines */
++
++/* e_ident[] Operating System/ABI */
++#define ELFOSABI_SYSV 0 /* UNIX System V ABI */
++#define ELFOSABI_HPUX 1 /* HP-UX operating system */
++#define ELFOSABI_NETBSD 2 /* NetBSD */
++#define ELFOSABI_LINUX 3 /* GNU/Linux */
++#define ELFOSABI_HURD 4 /* GNU/Hurd */
++#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */
++#define ELFOSABI_SOLARIS 6 /* Solaris */
++#define ELFOSABI_MONTEREY 7 /* Monterey */
++#define ELFOSABI_IRIX 8 /* IRIX */
++#define ELFOSABI_FREEBSD 9 /* FreeBSD */
++#define ELFOSABI_TRU64 10 /* TRU64 UNIX */
++#define ELFOSABI_MODESTO 11 /* Novell Modesto */
++#define ELFOSABI_OPENBSD 12 /* OpenBSD */
++#define ELFOSABI_ARM 97 /* ARM */
++#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
++
++/* e_ident */
++#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
++ (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
++ (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
++ (ehdr).e_ident[EI_MAG3] == ELFMAG3)
++
++/* ELF Header */
++typedef struct elfhdr {
++ unsigned char e_ident[EI_NIDENT]; /* ELF Identification */
++ Elf32_Half e_type; /* object file type */
++ Elf32_Half e_machine; /* machine */
++ Elf32_Word e_version; /* object file version */
++ Elf32_Addr e_entry; /* virtual entry point */
++ Elf32_Off e_phoff; /* program header table offset */
++ Elf32_Off e_shoff; /* section header table offset */
++ Elf32_Word e_flags; /* processor-specific flags */
++ Elf32_Half e_ehsize; /* ELF header size */
++ Elf32_Half e_phentsize; /* program header entry size */
++ Elf32_Half e_phnum; /* number of program header entries */
++ Elf32_Half e_shentsize; /* section header entry size */
++ Elf32_Half e_shnum; /* number of section header entries */
++ Elf32_Half e_shstrndx; /* section header table's "section
++ header string table" entry offset */
++} Elf32_Ehdr;
++
++typedef struct {
++ unsigned char e_ident[EI_NIDENT]; /* Id bytes */
++ Elf64_Quarter e_type; /* file type */
++ Elf64_Quarter e_machine; /* machine type */
++ Elf64_Half e_version; /* version number */
++ Elf64_Addr e_entry; /* entry point */
++ Elf64_Off e_phoff; /* Program hdr offset */
++ Elf64_Off e_shoff; /* Section hdr offset */
++ Elf64_Half e_flags; /* Processor flags */
++ Elf64_Quarter e_ehsize; /* sizeof ehdr */
++ Elf64_Quarter e_phentsize; /* Program header entry size */
++ Elf64_Quarter e_phnum; /* Number of program headers */
++ Elf64_Quarter e_shentsize; /* Section header entry size */
++ Elf64_Quarter e_shnum; /* Number of section headers */
++ Elf64_Quarter e_shstrndx; /* String table index */
++} Elf64_Ehdr;
++
++/* e_type */
++#define ET_NONE 0 /* No file type */
++#define ET_REL 1 /* relocatable file */
++#define ET_EXEC 2 /* executable file */
++#define ET_DYN 3 /* shared object file */
++#define ET_CORE 4 /* core file */
++#define ET_NUM 5 /* number of types */
++#define ET_LOPROC 0xff00 /* reserved range for processor */
++#define ET_HIPROC 0xffff /* specific e_type */
++
++/* e_machine */
++#define EM_NONE 0 /* No Machine */
++#define EM_M32 1 /* AT&T WE 32100 */
++#define EM_SPARC 2 /* SPARC */
++#define EM_386 3 /* Intel 80386 */
++#define EM_68K 4 /* Motorola 68000 */
++#define EM_88K 5 /* Motorola 88000 */
++#define EM_486 6 /* Intel 80486 - unused? */
++#define EM_860 7 /* Intel 80860 */
++#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */
++/*
++ * Don't know if EM_MIPS_RS4_BE,
++ * EM_SPARC64, EM_PARISC,
++ * or EM_PPC are ABI compliant
++ */
++#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
++#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */
++#define EM_PARISC 15 /* HPPA */
++#define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */
++#define EM_PPC 20 /* PowerPC */
++#define EM_PPC64 21 /* PowerPC 64-bit */
++#define EM_ARM 40 /* Advanced RISC Machines ARM */
++#define EM_ALPHA 41 /* DEC ALPHA */
++#define EM_SPARCV9 43 /* SPARC version 9 */
++#define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */
++#define EM_IA_64 50 /* Intel Merced */
++#define EM_X86_64 62 /* AMD x86-64 architecture */
++#define EM_VAX 75 /* DEC VAX */
++
++/* Version */
++#define EV_NONE 0 /* Invalid */
++#define EV_CURRENT 1 /* Current */
++#define EV_NUM 2 /* number of versions */
++
++/* Section Header */
++typedef struct {
++ Elf32_Word sh_name; /* name - index into section header
++ string table section */
++ Elf32_Word sh_type; /* type */
++ Elf32_Word sh_flags; /* flags */
++ Elf32_Addr sh_addr; /* address */
++ Elf32_Off sh_offset; /* file offset */
++ Elf32_Word sh_size; /* section size */
++ Elf32_Word sh_link; /* section header table index link */
++ Elf32_Word sh_info; /* extra information */
++ Elf32_Word sh_addralign; /* address alignment */
++ Elf32_Word sh_entsize; /* section entry size */
++} Elf32_Shdr;
++
++typedef struct {
++ Elf64_Half sh_name; /* section name */
++ Elf64_Half sh_type; /* section type */
++ Elf64_Xword sh_flags; /* section flags */
++ Elf64_Addr sh_addr; /* virtual address */
++ Elf64_Off sh_offset; /* file offset */
++ Elf64_Xword sh_size; /* section size */
++ Elf64_Half sh_link; /* link to another */
++ Elf64_Half sh_info; /* misc info */
++ Elf64_Xword sh_addralign; /* memory alignment */
++ Elf64_Xword sh_entsize; /* table entry size */
++} Elf64_Shdr;
++
++/* Special Section Indexes */
++#define SHN_UNDEF 0 /* undefined */
++#define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */
++#define SHN_LOPROC 0xff00 /* reserved range for processor */
++#define SHN_HIPROC 0xff1f /* specific section indexes */
++#define SHN_ABS 0xfff1 /* absolute value */
++#define SHN_COMMON 0xfff2 /* common symbol */
++#define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */
++
++/* sh_type */
++#define SHT_NULL 0 /* inactive */
++#define SHT_PROGBITS 1 /* program defined information */
++#define SHT_SYMTAB 2 /* symbol table section */
++#define SHT_STRTAB 3 /* string table section */
++#define SHT_RELA 4 /* relocation section with addends*/
++#define SHT_HASH 5 /* symbol hash table section */
++#define SHT_DYNAMIC 6 /* dynamic section */
++#define SHT_NOTE 7 /* note section */
++#define SHT_NOBITS 8 /* no space section */
++#define SHT_REL 9 /* relation section without addends */
++#define SHT_SHLIB 10 /* reserved - purpose unknown */
++#define SHT_DYNSYM 11 /* dynamic symbol table section */
++#define SHT_NUM 12 /* number of section types */
++#define SHT_LOPROC 0x70000000 /* reserved range for processor */
++#define SHT_HIPROC 0x7fffffff /* specific section header types */
++#define SHT_LOUSER 0x80000000 /* reserved range for application */
++#define SHT_HIUSER 0xffffffff /* specific indexes */
++
++/* Section names */
++#define ELF_BSS ".bss" /* uninitialized data */
++#define ELF_DATA ".data" /* initialized data */
++#define ELF_DEBUG ".debug" /* debug */
++#define ELF_DYNAMIC ".dynamic" /* dynamic linking information */
++#define ELF_DYNSTR ".dynstr" /* dynamic string table */
++#define ELF_DYNSYM ".dynsym" /* dynamic symbol table */
++#define ELF_FINI ".fini" /* termination code */
++#define ELF_GOT ".got" /* global offset table */
++#define ELF_HASH ".hash" /* symbol hash table */
++#define ELF_INIT ".init" /* initialization code */
++#define ELF_REL_DATA ".rel.data" /* relocation data */
++#define ELF_REL_FINI ".rel.fini" /* relocation termination code */
++#define ELF_REL_INIT ".rel.init" /* relocation initialization code */
++#define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */
++#define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */
++#define ELF_REL_TEXT ".rel.text" /* relocation code */
++#define ELF_RODATA ".rodata" /* read-only data */
++#define ELF_SHSTRTAB ".shstrtab" /* section header string table */
++#define ELF_STRTAB ".strtab" /* string table */
++#define ELF_SYMTAB ".symtab" /* symbol table */
++#define ELF_TEXT ".text" /* code */
++
++
++/* Section Attribute Flags - sh_flags */
++#define SHF_WRITE 0x1 /* Writable */
++#define SHF_ALLOC 0x2 /* occupies memory */
++#define SHF_EXECINSTR 0x4 /* executable */
++#define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */
++ /* specific section attributes */
++
++/* Symbol Table Entry */
++typedef struct elf32_sym {
++ Elf32_Word st_name; /* name - index into string table */
++ Elf32_Addr st_value; /* symbol value */
++ Elf32_Word st_size; /* symbol size */
++ unsigned char st_info; /* type and binding */
++ unsigned char st_other; /* 0 - no defined meaning */
++ Elf32_Half st_shndx; /* section header index */
++} Elf32_Sym;
++
++typedef struct {
++ Elf64_Half st_name; /* Symbol name index in str table */
++ Elf_Byte st_info; /* type / binding attrs */
++ Elf_Byte st_other; /* unused */
++ Elf64_Quarter st_shndx; /* section index of symbol */
++ Elf64_Xword st_value; /* value of symbol */
++ Elf64_Xword st_size; /* size of symbol */
++} Elf64_Sym;
++
++/* Symbol table index */
++#define STN_UNDEF 0 /* undefined */
++
++/* Extract symbol info - st_info */
++#define ELF32_ST_BIND(x) ((x) >> 4)
++#define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf)
++#define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf))
++
++#define ELF64_ST_BIND(x) ((x) >> 4)
++#define ELF64_ST_TYPE(x) (((unsigned int) x) & 0xf)
++#define ELF64_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf))
++
++/* Symbol Binding - ELF32_ST_BIND - st_info */
++#define STB_LOCAL 0 /* Local symbol */
++#define STB_GLOBAL 1 /* Global symbol */
++#define STB_WEAK 2 /* like global - lower precedence */
++#define STB_NUM 3 /* number of symbol bindings */
++#define STB_LOPROC 13 /* reserved range for processor */
++#define STB_HIPROC 15 /* specific symbol bindings */
++
++/* Symbol type - ELF32_ST_TYPE - st_info */
++#define STT_NOTYPE 0 /* not specified */
++#define STT_OBJECT 1 /* data object */
++#define STT_FUNC 2 /* function */
++#define STT_SECTION 3 /* section */
++#define STT_FILE 4 /* file */
++#define STT_NUM 5 /* number of symbol types */
++#define STT_LOPROC 13 /* reserved range for processor */
++#define STT_HIPROC 15 /* specific symbol types */
++
++/* Relocation entry with implicit addend */
++typedef struct {
++ Elf32_Addr r_offset; /* offset of relocation */
++ Elf32_Word r_info; /* symbol table index and type */
++} Elf32_Rel;
++
++/* Relocation entry with explicit addend */
++typedef struct {
++ Elf32_Addr r_offset; /* offset of relocation */
++ Elf32_Word r_info; /* symbol table index and type */
++ Elf32_Sword r_addend;
++} Elf32_Rela;
++
++/* Extract relocation info - r_info */
++#define ELF32_R_SYM(i) ((i) >> 8)
++#define ELF32_R_TYPE(i) ((unsigned char) (i))
++#define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t))
++
++typedef struct {
++ Elf64_Xword r_offset; /* where to do it */
++ Elf64_Xword r_info; /* index & type of relocation */
++} Elf64_Rel;
++
++typedef struct {
++ Elf64_Xword r_offset; /* where to do it */
++ Elf64_Xword r_info; /* index & type of relocation */
++ Elf64_Sxword r_addend; /* adjustment value */
++} Elf64_Rela;
++
++#define ELF64_R_SYM(info) ((info) >> 32)
++#define ELF64_R_TYPE(info) ((info) & 0xFFFFFFFF)
++#define ELF64_R_INFO(s,t) (((s) << 32) + (u_int32_t)(t))
++
++/* Program Header */
++typedef struct {
++ Elf32_Word p_type; /* segment type */
++ Elf32_Off p_offset; /* segment offset */
++ Elf32_Addr p_vaddr; /* virtual address of segment */
++ Elf32_Addr p_paddr; /* physical address - ignored? */
++ Elf32_Word p_filesz; /* number of bytes in file for seg. */
++ Elf32_Word p_memsz; /* number of bytes in mem. for seg. */
++ Elf32_Word p_flags; /* flags */
++ Elf32_Word p_align; /* memory alignment */
++} Elf32_Phdr;
++
++typedef struct {
++ Elf64_Half p_type; /* entry type */
++ Elf64_Half p_flags; /* flags */
++ Elf64_Off p_offset; /* offset */
++ Elf64_Addr p_vaddr; /* virtual address */
++ Elf64_Addr p_paddr; /* physical address */
++ Elf64_Xword p_filesz; /* file size */
++ Elf64_Xword p_memsz; /* memory size */
++ Elf64_Xword p_align; /* memory & file alignment */
++} Elf64_Phdr;
++
++/* Segment types - p_type */
++#define PT_NULL 0 /* unused */
++#define PT_LOAD 1 /* loadable segment */
++#define PT_DYNAMIC 2 /* dynamic linking section */
++#define PT_INTERP 3 /* the RTLD */
++#define PT_NOTE 4 /* auxiliary information */
++#define PT_SHLIB 5 /* reserved - purpose undefined */
++#define PT_PHDR 6 /* program header */
++#define PT_NUM 7 /* Number of segment types */
++#define PT_LOPROC 0x70000000 /* reserved range for processor */
++#define PT_HIPROC 0x7fffffff /* specific segment types */
++
++/* Segment flags - p_flags */
++#define PF_X 0x1 /* Executable */
++#define PF_W 0x2 /* Writable */
++#define PF_R 0x4 /* Readable */
++#define PF_MASKPROC 0xf0000000 /* reserved bits for processor */
++ /* specific segment flags */
++
++/* Dynamic structure */
++typedef struct {
++ Elf32_Sword d_tag; /* controls meaning of d_val */
++ union {
++ Elf32_Word d_val; /* Multiple meanings - see d_tag */
++ Elf32_Addr d_ptr; /* program virtual address */
++ } d_un;
++} Elf32_Dyn;
++
++typedef struct {
++ Elf64_Xword d_tag; /* controls meaning of d_val */
++ union {
++ Elf64_Addr d_ptr;
++ Elf64_Xword d_val;
++ } d_un;
++} Elf64_Dyn;
++
++/* Dynamic Array Tags - d_tag */
++#define DT_NULL 0 /* marks end of _DYNAMIC array */
++#define DT_NEEDED 1 /* string table offset of needed lib */
++#define DT_PLTRELSZ 2 /* size of relocation entries in PLT */
++#define DT_PLTGOT 3 /* address PLT/GOT */
++#define DT_HASH 4 /* address of symbol hash table */
++#define DT_STRTAB 5 /* address of string table */
++#define DT_SYMTAB 6 /* address of symbol table */
++#define DT_RELA 7 /* address of relocation table */
++#define DT_RELASZ 8 /* size of relocation table */
++#define DT_RELAENT 9 /* size of relocation entry */
++#define DT_STRSZ 10 /* size of string table */
++#define DT_SYMENT 11 /* size of symbol table entry */
++#define DT_INIT 12 /* address of initialization func. */
++#define DT_FINI 13 /* address of termination function */
++#define DT_SONAME 14 /* string table offset of shared obj */
++#define DT_RPATH 15 /* string table offset of library
++ search path */
++#define DT_SYMBOLIC 16 /* start sym search in shared obj. */
++#define DT_REL 17 /* address of rel. tbl. w addends */
++#define DT_RELSZ 18 /* size of DT_REL relocation table */
++#define DT_RELENT 19 /* size of DT_REL relocation entry */
++#define DT_PLTREL 20 /* PLT referenced relocation entry */
++#define DT_DEBUG 21 /* bugger */
++#define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */
++#define DT_JMPREL 23 /* add. of PLT's relocation entries */
++#define DT_BIND_NOW 24 /* Bind now regardless of env setting */
++#define DT_NUM 25 /* Number used. */
++#define DT_LOPROC 0x70000000 /* reserved range for processor */
++#define DT_HIPROC 0x7fffffff /* specific dynamic array tags */
++
++/* Standard ELF hashing function */
++unsigned int elf_hash(const unsigned char *name);
++
++/*
++ * Note Definitions
++ */
++typedef struct {
++ Elf32_Word namesz;
++ Elf32_Word descsz;
++ Elf32_Word type;
++} Elf32_Note;
++
++typedef struct {
++ Elf64_Half namesz;
++ Elf64_Half descsz;
++ Elf64_Half type;
++} Elf64_Note;
++
++
++#if defined(ELFSIZE)
++#define CONCAT(x,y) __CONCAT(x,y)
++#define ELFNAME(x) CONCAT(elf,CONCAT(ELFSIZE,CONCAT(_,x)))
++#define ELFNAME2(x,y) CONCAT(x,CONCAT(_elf,CONCAT(ELFSIZE,CONCAT(_,y))))
++#define ELFNAMEEND(x) CONCAT(x,CONCAT(_elf,ELFSIZE))
++#define ELFDEFNNAME(x) CONCAT(ELF,CONCAT(ELFSIZE,CONCAT(_,x)))
++#endif
++
++#if defined(ELFSIZE) && (ELFSIZE == 32)
++#define Elf_Ehdr Elf32_Ehdr
++#define Elf_Phdr Elf32_Phdr
++#define Elf_Shdr Elf32_Shdr
++#define Elf_Sym Elf32_Sym
++#define Elf_Rel Elf32_Rel
++#define Elf_RelA Elf32_Rela
++#define Elf_Dyn Elf32_Dyn
++#define Elf_Word Elf32_Word
++#define Elf_Sword Elf32_Sword
++#define Elf_Addr Elf32_Addr
++#define Elf_Off Elf32_Off
++#define Elf_Nhdr Elf32_Nhdr
++#define Elf_Note Elf32_Note
++
++#define ELF_R_SYM ELF32_R_SYM
++#define ELF_R_TYPE ELF32_R_TYPE
++#define ELF_R_INFO ELF32_R_INFO
++#define ELFCLASS ELFCLASS32
++
++#define ELF_ST_BIND ELF32_ST_BIND
++#define ELF_ST_TYPE ELF32_ST_TYPE
++#define ELF_ST_INFO ELF32_ST_INFO
++
++#define AuxInfo Aux32Info
++#elif defined(ELFSIZE) && (ELFSIZE == 64)
++#define Elf_Ehdr Elf64_Ehdr
++#define Elf_Phdr Elf64_Phdr
++#define Elf_Shdr Elf64_Shdr
++#define Elf_Sym Elf64_Sym
++#define Elf_Rel Elf64_Rel
++#define Elf_RelA Elf64_Rela
++#define Elf_Dyn Elf64_Dyn
++#define Elf_Word Elf64_Word
++#define Elf_Sword Elf64_Sword
++#define Elf_Addr Elf64_Addr
++#define Elf_Off Elf64_Off
++#define Elf_Nhdr Elf64_Nhdr
++#define Elf_Note Elf64_Note
++
++#define ELF_R_SYM ELF64_R_SYM
++#define ELF_R_TYPE ELF64_R_TYPE
++#define ELF_R_INFO ELF64_R_INFO
++#define ELFCLASS ELFCLASS64
++
++#define ELF_ST_BIND ELF64_ST_BIND
++#define ELF_ST_TYPE ELF64_ST_TYPE
++#define ELF_ST_INFO ELF64_ST_INFO
++
++#define AuxInfo Aux64Info
++#endif
++
++#endif /* __XEN_PUBLIC_ELFSTRUCTS_H__ */
+Index: head-2008-11-25/include/xen/interface/hvm/e820.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/hvm/e820.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,34 @@
++
++/*
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_PUBLIC_HVM_E820_H__
++#define __XEN_PUBLIC_HVM_E820_H__
++
++/* E820 location in HVM virtual address space. */
++#define HVM_E820_PAGE 0x00090000
++#define HVM_E820_NR_OFFSET 0x000001E8
++#define HVM_E820_OFFSET 0x000002D0
++
++#define HVM_BELOW_4G_RAM_END 0xF0000000
++#define HVM_BELOW_4G_MMIO_START HVM_BELOW_4G_RAM_END
++#define HVM_BELOW_4G_MMIO_LENGTH ((1ULL << 32) - HVM_BELOW_4G_MMIO_START)
++
++#endif /* __XEN_PUBLIC_HVM_E820_H__ */
+Index: head-2008-11-25/include/xen/interface/hvm/hvm_info_table.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/hvm/hvm_info_table.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,41 @@
++/******************************************************************************
++ * hvm/hvm_info_table.h
++ *
++ * HVM parameter and information table, written into guest memory map.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__
++#define __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__
++
++#define HVM_INFO_PFN 0x09F
++#define HVM_INFO_OFFSET 0x800
++#define HVM_INFO_PADDR ((HVM_INFO_PFN << 12) + HVM_INFO_OFFSET)
++
++struct hvm_info_table {
++ char signature[8]; /* "HVM INFO" */
++ uint32_t length;
++ uint8_t checksum;
++ uint8_t acpi_enabled;
++ uint8_t apic_mode;
++ uint32_t nr_vcpus;
++};
++
++#endif /* __XEN_PUBLIC_HVM_HVM_INFO_TABLE_H__ */
+Index: head-2008-11-25/include/xen/interface/hvm/hvm_op.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/hvm/hvm_op.h 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,131 @@
++/*
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_PUBLIC_HVM_HVM_OP_H__
++#define __XEN_PUBLIC_HVM_HVM_OP_H__
++
++/* Get/set subcommands: extra argument == pointer to xen_hvm_param struct. */
++#define HVMOP_set_param 0
++#define HVMOP_get_param 1
++struct xen_hvm_param {
++ domid_t domid; /* IN */
++ uint32_t index; /* IN */
++ uint64_t value; /* IN/OUT */
++};
++typedef struct xen_hvm_param xen_hvm_param_t;
++DEFINE_XEN_GUEST_HANDLE(xen_hvm_param_t);
++
++/* Set the logical level of one of a domain's PCI INTx wires. */
++#define HVMOP_set_pci_intx_level 2
++struct xen_hvm_set_pci_intx_level {
++ /* Domain to be updated. */
++ domid_t domid;
++ /* PCI INTx identification in PCI topology (domain:bus:device:intx). */
++ uint8_t domain, bus, device, intx;
++ /* Assertion level (0 = unasserted, 1 = asserted). */
++ uint8_t level;
++};
++typedef struct xen_hvm_set_pci_intx_level xen_hvm_set_pci_intx_level_t;
++DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_pci_intx_level_t);
++
++/* Set the logical level of one of a domain's ISA IRQ wires. */
++#define HVMOP_set_isa_irq_level 3
++struct xen_hvm_set_isa_irq_level {
++ /* Domain to be updated. */
++ domid_t domid;
++ /* ISA device identification, by ISA IRQ (0-15). */
++ uint8_t isa_irq;
++ /* Assertion level (0 = unasserted, 1 = asserted). */
++ uint8_t level;
++};
++typedef struct xen_hvm_set_isa_irq_level xen_hvm_set_isa_irq_level_t;
++DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_isa_irq_level_t);
++
++#define HVMOP_set_pci_link_route 4
++struct xen_hvm_set_pci_link_route {
++ /* Domain to be updated. */
++ domid_t domid;
++ /* PCI link identifier (0-3). */
++ uint8_t link;
++ /* ISA IRQ (1-15), or 0 (disable link). */
++ uint8_t isa_irq;
++};
++typedef struct xen_hvm_set_pci_link_route xen_hvm_set_pci_link_route_t;
++DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_pci_link_route_t);
++
++/* Flushes all VCPU TLBs: @arg must be NULL. */
++#define HVMOP_flush_tlbs 5
++
++/* Following tools-only interfaces may change in future. */
++#if defined(__XEN__) || defined(__XEN_TOOLS__)
++
++/* Track dirty VRAM. */
++#define HVMOP_track_dirty_vram 6
++struct xen_hvm_track_dirty_vram {
++ /* Domain to be tracked. */
++ domid_t domid;
++ /* First pfn to track. */
++ uint64_aligned_t first_pfn;
++ /* Number of pages to track. */
++ uint64_aligned_t nr;
++ /* OUT variable. */
++ /* Dirty bitmap buffer. */
++ XEN_GUEST_HANDLE_64(uint8) dirty_bitmap;
++};
++typedef struct xen_hvm_track_dirty_vram xen_hvm_track_dirty_vram_t;
++DEFINE_XEN_GUEST_HANDLE(xen_hvm_track_dirty_vram_t);
++
++/* Notify that some pages got modified by the Device Model. */
++#define HVMOP_modified_memory 7
++struct xen_hvm_modified_memory {
++ /* Domain to be updated. */
++ domid_t domid;
++ /* First pfn. */
++ uint64_aligned_t first_pfn;
++ /* Number of pages. */
++ uint64_aligned_t nr;
++};
++typedef struct xen_hvm_modified_memory xen_hvm_modified_memory_t;
++DEFINE_XEN_GUEST_HANDLE(xen_hvm_modified_memory_t);
++
++#define HVMOP_set_mem_type 8
++typedef enum {
++ HVMMEM_ram_rw, /* Normal read/write guest RAM */
++ HVMMEM_ram_ro, /* Read-only; writes are discarded */
++ HVMMEM_mmio_dm, /* Reads and write go to the device model */
++} hvmmem_type_t;
++/* Notify that a region of memory is to be treated in a specific way. */
++struct xen_hvm_set_mem_type {
++ /* Domain to be updated. */
++ domid_t domid;
++ /* Memory type */
++ hvmmem_type_t hvmmem_type;
++ /* First pfn. */
++ uint64_aligned_t first_pfn;
++ /* Number of pages. */
++ uint64_aligned_t nr;
++};
++typedef struct xen_hvm_set_mem_type xen_hvm_set_mem_type_t;
++DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_mem_type_t);
++
++
++#endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */
++
++#endif /* __XEN_PUBLIC_HVM_HVM_OP_H__ */
+Index: head-2008-11-25/include/xen/interface/hvm/ioreq.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/hvm/ioreq.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,127 @@
++/*
++ * ioreq.h: I/O request definitions for device models
++ * Copyright (c) 2004, Intel Corporation.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef _IOREQ_H_
++#define _IOREQ_H_
++
++#define IOREQ_READ 1
++#define IOREQ_WRITE 0
++
++#define STATE_IOREQ_NONE 0
++#define STATE_IOREQ_READY 1
++#define STATE_IOREQ_INPROCESS 2
++#define STATE_IORESP_READY 3
++
++#define IOREQ_TYPE_PIO 0 /* pio */
++#define IOREQ_TYPE_COPY 1 /* mmio ops */
++#define IOREQ_TYPE_TIMEOFFSET 7
++#define IOREQ_TYPE_INVALIDATE 8 /* mapcache */
++
++/*
++ * VMExit dispatcher should cooperate with instruction decoder to
++ * prepare this structure and notify service OS and DM by sending
++ * virq
++ */
++struct ioreq {
++ uint64_t addr; /* physical address */
++ uint64_t size; /* size in bytes */
++ uint64_t count; /* for rep prefixes */
++ uint64_t data; /* data (or paddr of data) */
++ uint8_t state:4;
++ uint8_t data_is_ptr:1; /* if 1, data above is the guest paddr
++ * of the real data to use. */
++ uint8_t dir:1; /* 1=read, 0=write */
++ uint8_t df:1;
++ uint8_t pad:1;
++ uint8_t type; /* I/O type */
++ uint8_t _pad0[6];
++ uint64_t io_count; /* How many IO done on a vcpu */
++};
++typedef struct ioreq ioreq_t;
++
++struct vcpu_iodata {
++ struct ioreq vp_ioreq;
++ /* Event channel port, used for notifications to/from the device model. */
++ uint32_t vp_eport;
++ uint32_t _pad0;
++};
++typedef struct vcpu_iodata vcpu_iodata_t;
++
++struct shared_iopage {
++ struct vcpu_iodata vcpu_iodata[1];
++};
++typedef struct shared_iopage shared_iopage_t;
++
++struct buf_ioreq {
++ uint8_t type; /* I/O type */
++ uint8_t pad:1;
++ uint8_t dir:1; /* 1=read, 0=write */
++ uint8_t size:2; /* 0=>1, 1=>2, 2=>4, 3=>8. If 8, use two buf_ioreqs */
++ uint32_t addr:20;/* physical address */
++ uint32_t data; /* data */
++};
++typedef struct buf_ioreq buf_ioreq_t;
++
++#define IOREQ_BUFFER_SLOT_NUM 511 /* 8 bytes each, plus 2 4-byte indexes */
++struct buffered_iopage {
++ unsigned int read_pointer;
++ unsigned int write_pointer;
++ buf_ioreq_t buf_ioreq[IOREQ_BUFFER_SLOT_NUM];
++}; /* NB. Size of this structure must be no greater than one page. */
++typedef struct buffered_iopage buffered_iopage_t;
++
++#if defined(__ia64__)
++struct pio_buffer {
++ uint32_t page_offset;
++ uint32_t pointer;
++ uint32_t data_end;
++ uint32_t buf_size;
++ void *opaque;
++};
++
++#define PIO_BUFFER_IDE_PRIMARY 0 /* I/O port = 0x1F0 */
++#define PIO_BUFFER_IDE_SECONDARY 1 /* I/O port = 0x170 */
++#define PIO_BUFFER_ENTRY_NUM 2
++struct buffered_piopage {
++ struct pio_buffer pio[PIO_BUFFER_ENTRY_NUM];
++ uint8_t buffer[1];
++};
++#endif /* defined(__ia64__) */
++
++#define ACPI_PM1A_EVT_BLK_ADDRESS 0x0000000000001f40
++#define ACPI_PM1A_CNT_BLK_ADDRESS (ACPI_PM1A_EVT_BLK_ADDRESS + 0x04)
++#define ACPI_PM_TMR_BLK_ADDRESS (ACPI_PM1A_EVT_BLK_ADDRESS + 0x08)
++#define ACPI_GPE0_BLK_ADDRESS (ACPI_PM_TMR_BLK_ADDRESS + 0x20)
++#define ACPI_GPE0_BLK_LEN 0x08
++
++#endif /* _IOREQ_H_ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/hvm/params.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/hvm/params.h 2008-10-29 09:55:56.000000000 +0100
+@@ -0,0 +1,105 @@
++/*
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_PUBLIC_HVM_PARAMS_H__
++#define __XEN_PUBLIC_HVM_PARAMS_H__
++
++#include "hvm_op.h"
++
++/*
++ * Parameter space for HVMOP_{set,get}_param.
++ */
++
++/*
++ * How should CPU0 event-channel notifications be delivered?
++ * val[63:56] == 0: val[55:0] is a delivery GSI (Global System Interrupt).
++ * val[63:56] == 1: val[55:0] is a delivery PCI INTx line, as follows:
++ * Domain = val[47:32], Bus = val[31:16],
++ * DevFn = val[15: 8], IntX = val[ 1: 0]
++ * If val == 0 then CPU0 event-channel notifications are not delivered.
++ */
++#define HVM_PARAM_CALLBACK_IRQ 0
++
++/*
++ * These are not used by Xen. They are here for convenience of HVM-guest
++ * xenbus implementations.
++ */
++#define HVM_PARAM_STORE_PFN 1
++#define HVM_PARAM_STORE_EVTCHN 2
++
++#define HVM_PARAM_PAE_ENABLED 4
++
++#define HVM_PARAM_IOREQ_PFN 5
++
++#define HVM_PARAM_BUFIOREQ_PFN 6
++
++#ifdef __ia64__
++
++#define HVM_PARAM_NVRAM_FD 7
++#define HVM_PARAM_VHPT_SIZE 8
++#define HVM_PARAM_BUFPIOREQ_PFN 9
++
++#elif defined(__i386__) || defined(__x86_64__)
++
++/* Expose Viridian interfaces to this HVM guest? */
++#define HVM_PARAM_VIRIDIAN 9
++
++#endif
++
++/*
++ * Set mode for virtual timers (currently x86 only):
++ * delay_for_missed_ticks (default):
++ * Do not advance a vcpu's time beyond the correct delivery time for
++ * interrupts that have been missed due to preemption. Deliver missed
++ * interrupts when the vcpu is rescheduled and advance the vcpu's virtual
++ * time stepwise for each one.
++ * no_delay_for_missed_ticks:
++ * As above, missed interrupts are delivered, but guest time always tracks
++ * wallclock (i.e., real) time while doing so.
++ * no_missed_ticks_pending:
++ * No missed interrupts are held pending. Instead, to ensure ticks are
++ * delivered at some non-zero rate, if we detect missed ticks then the
++ * internal tick alarm is not disabled if the VCPU is preempted during the
++ * next tick period.
++ * one_missed_tick_pending:
++ * Missed interrupts are collapsed together and delivered as one 'late tick'.
++ * Guest time always tracks wallclock (i.e., real) time.
++ */
++#define HVM_PARAM_TIMER_MODE 10
++#define HVMPTM_delay_for_missed_ticks 0
++#define HVMPTM_no_delay_for_missed_ticks 1
++#define HVMPTM_no_missed_ticks_pending 2
++#define HVMPTM_one_missed_tick_pending 3
++
++/* Boolean: Enable virtual HPET (high-precision event timer)? (x86-only) */
++#define HVM_PARAM_HPET_ENABLED 11
++
++/* Identity-map page directory used by Intel EPT when CR0.PG=0. */
++#define HVM_PARAM_IDENT_PT 12
++
++/* Device Model domain, defaults to 0. */
++#define HVM_PARAM_DM_DOMAIN 13
++
++/* ACPI S state: currently support S0 and S3 on x86. */
++#define HVM_PARAM_ACPI_S_STATE 14
++
++#define HVM_NR_PARAMS 15
++
++#endif /* __XEN_PUBLIC_HVM_PARAMS_H__ */
+Index: head-2008-11-25/include/xen/interface/hvm/save.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/hvm/save.h 2008-04-02 12:34:02.000000000 +0200
+@@ -0,0 +1,88 @@
++/*
++ * hvm/save.h
++ *
++ * Structure definitions for HVM state that is held by Xen and must
++ * be saved along with the domain's memory and device-model state.
++ *
++ * Copyright (c) 2007 XenSource Ltd.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_PUBLIC_HVM_SAVE_H__
++#define __XEN_PUBLIC_HVM_SAVE_H__
++
++/*
++ * Structures in this header *must* have the same layout in 32bit
++ * and 64bit environments: this means that all fields must be explicitly
++ * sized types and aligned to their sizes, and the structs must be
++ * a multiple of eight bytes long.
++ *
++ * Only the state necessary for saving and restoring (i.e. fields
++ * that are analogous to actual hardware state) should go in this file.
++ * Internal mechanisms should be kept in Xen-private headers.
++ */
++
++#if !defined(__GNUC__) || defined(__STRICT_ANSI__)
++#error "Anonymous structs/unions are a GNU extension."
++#endif
++
++/*
++ * Each entry is preceded by a descriptor giving its type and length
++ */
++struct hvm_save_descriptor {
++ uint16_t typecode; /* Used to demux the various types below */
++ uint16_t instance; /* Further demux within a type */
++ uint32_t length; /* In bytes, *not* including this descriptor */
++};
++
++
++/*
++ * Each entry has a datatype associated with it: for example, the CPU state
++ * is saved as a HVM_SAVE_TYPE(CPU), which has HVM_SAVE_LENGTH(CPU),
++ * and is identified by a descriptor with typecode HVM_SAVE_CODE(CPU).
++ * DECLARE_HVM_SAVE_TYPE binds these things together with some type-system
++ * ugliness.
++ */
++
++#define DECLARE_HVM_SAVE_TYPE(_x, _code, _type) \
++ struct __HVM_SAVE_TYPE_##_x { _type t; char c[_code]; }
++
++#define HVM_SAVE_TYPE(_x) typeof (((struct __HVM_SAVE_TYPE_##_x *)(0))->t)
++#define HVM_SAVE_LENGTH(_x) (sizeof (HVM_SAVE_TYPE(_x)))
++#define HVM_SAVE_CODE(_x) (sizeof (((struct __HVM_SAVE_TYPE_##_x *)(0))->c))
++
++
++/*
++ * The series of save records is teminated by a zero-type, zero-length
++ * descriptor.
++ */
++
++struct hvm_save_end {};
++DECLARE_HVM_SAVE_TYPE(END, 0, struct hvm_save_end);
++
++#if defined(__i386__) || defined(__x86_64__)
++#include "../arch-x86/hvm/save.h"
++#elif defined(__ia64__)
++#include "../arch-ia64/hvm/save.h"
++#else
++#error "unsupported architecture"
++#endif
++
++#endif /* __XEN_PUBLIC_HVM_SAVE_H__ */
+Index: head-2008-11-25/include/xen/interface/hvm/vmx_assist.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/hvm/vmx_assist.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,122 @@
++/*
++ * vmx_assist.h: Context definitions for the VMXASSIST world switch.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Leendert van Doorn, leendert@watson.ibm.com
++ * Copyright (c) 2005, International Business Machines Corporation.
++ */
++
++#ifndef _VMX_ASSIST_H_
++#define _VMX_ASSIST_H_
++
++#define VMXASSIST_BASE 0xD0000
++#define VMXASSIST_MAGIC 0x17101966
++#define VMXASSIST_MAGIC_OFFSET (VMXASSIST_BASE+8)
++
++#define VMXASSIST_NEW_CONTEXT (VMXASSIST_BASE + 12)
++#define VMXASSIST_OLD_CONTEXT (VMXASSIST_NEW_CONTEXT + 4)
++
++#ifndef __ASSEMBLY__
++
++#define NR_EXCEPTION_HANDLER 32
++#define NR_INTERRUPT_HANDLERS 16
++#define NR_TRAPS (NR_EXCEPTION_HANDLER+NR_INTERRUPT_HANDLERS)
++
++union vmcs_arbytes {
++ struct arbyte_fields {
++ unsigned int seg_type : 4,
++ s : 1,
++ dpl : 2,
++ p : 1,
++ reserved0 : 4,
++ avl : 1,
++ reserved1 : 1,
++ default_ops_size: 1,
++ g : 1,
++ null_bit : 1,
++ reserved2 : 15;
++ } fields;
++ unsigned int bytes;
++};
++
++/*
++ * World switch state
++ */
++struct vmx_assist_context {
++ uint32_t eip; /* execution pointer */
++ uint32_t esp; /* stack pointer */
++ uint32_t eflags; /* flags register */
++ uint32_t cr0;
++ uint32_t cr3; /* page table directory */
++ uint32_t cr4;
++ uint32_t idtr_limit; /* idt */
++ uint32_t idtr_base;
++ uint32_t gdtr_limit; /* gdt */
++ uint32_t gdtr_base;
++ uint32_t cs_sel; /* cs selector */
++ uint32_t cs_limit;
++ uint32_t cs_base;
++ union vmcs_arbytes cs_arbytes;
++ uint32_t ds_sel; /* ds selector */
++ uint32_t ds_limit;
++ uint32_t ds_base;
++ union vmcs_arbytes ds_arbytes;
++ uint32_t es_sel; /* es selector */
++ uint32_t es_limit;
++ uint32_t es_base;
++ union vmcs_arbytes es_arbytes;
++ uint32_t ss_sel; /* ss selector */
++ uint32_t ss_limit;
++ uint32_t ss_base;
++ union vmcs_arbytes ss_arbytes;
++ uint32_t fs_sel; /* fs selector */
++ uint32_t fs_limit;
++ uint32_t fs_base;
++ union vmcs_arbytes fs_arbytes;
++ uint32_t gs_sel; /* gs selector */
++ uint32_t gs_limit;
++ uint32_t gs_base;
++ union vmcs_arbytes gs_arbytes;
++ uint32_t tr_sel; /* task selector */
++ uint32_t tr_limit;
++ uint32_t tr_base;
++ union vmcs_arbytes tr_arbytes;
++ uint32_t ldtr_sel; /* ldtr selector */
++ uint32_t ldtr_limit;
++ uint32_t ldtr_base;
++ union vmcs_arbytes ldtr_arbytes;
++
++ unsigned char rm_irqbase[2];
++};
++typedef struct vmx_assist_context vmx_assist_context_t;
++
++#endif /* __ASSEMBLY__ */
++
++#endif /* _VMX_ASSIST_H_ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/fsif.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/io/fsif.h 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,191 @@
++/******************************************************************************
++ * fsif.h
++ *
++ * Interface to FS level split device drivers.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2007, Grzegorz Milos, <gm281@cam.ac.uk>.
++ */
++
++#ifndef __XEN_PUBLIC_IO_FSIF_H__
++#define __XEN_PUBLIC_IO_FSIF_H__
++
++#include "ring.h"
++#include "../grant_table.h"
++
++#define REQ_FILE_OPEN 1
++#define REQ_FILE_CLOSE 2
++#define REQ_FILE_READ 3
++#define REQ_FILE_WRITE 4
++#define REQ_STAT 5
++#define REQ_FILE_TRUNCATE 6
++#define REQ_REMOVE 7
++#define REQ_RENAME 8
++#define REQ_CREATE 9
++#define REQ_DIR_LIST 10
++#define REQ_CHMOD 11
++#define REQ_FS_SPACE 12
++#define REQ_FILE_SYNC 13
++
++struct fsif_open_request {
++ grant_ref_t gref;
++};
++
++struct fsif_close_request {
++ uint32_t fd;
++};
++
++struct fsif_read_request {
++ uint32_t fd;
++ int32_t pad;
++ uint64_t len;
++ uint64_t offset;
++ grant_ref_t grefs[1]; /* Variable length */
++};
++
++struct fsif_write_request {
++ uint32_t fd;
++ int32_t pad;
++ uint64_t len;
++ uint64_t offset;
++ grant_ref_t grefs[1]; /* Variable length */
++};
++
++struct fsif_stat_request {
++ uint32_t fd;
++};
++
++/* This structure is a copy of some fields from stat structure, returned
++ * via the ring. */
++struct fsif_stat_response {
++ int32_t stat_mode;
++ uint32_t stat_uid;
++ uint32_t stat_gid;
++ int32_t stat_ret;
++ int64_t stat_size;
++ int64_t stat_atime;
++ int64_t stat_mtime;
++ int64_t stat_ctime;
++};
++
++struct fsif_truncate_request {
++ uint32_t fd;
++ int32_t pad;
++ int64_t length;
++};
++
++struct fsif_remove_request {
++ grant_ref_t gref;
++};
++
++struct fsif_rename_request {
++ uint16_t old_name_offset;
++ uint16_t new_name_offset;
++ grant_ref_t gref;
++};
++
++struct fsif_create_request {
++ int8_t directory;
++ int8_t pad;
++ int16_t pad2;
++ int32_t mode;
++ grant_ref_t gref;
++};
++
++struct fsif_list_request {
++ uint32_t offset;
++ grant_ref_t gref;
++};
++
++#define NR_FILES_SHIFT 0
++#define NR_FILES_SIZE 16 /* 16 bits for the number of files mask */
++#define NR_FILES_MASK (((1ULL << NR_FILES_SIZE) - 1) << NR_FILES_SHIFT)
++#define ERROR_SIZE 32 /* 32 bits for the error mask */
++#define ERROR_SHIFT (NR_FILES_SIZE + NR_FILES_SHIFT)
++#define ERROR_MASK (((1ULL << ERROR_SIZE) - 1) << ERROR_SHIFT)
++#define HAS_MORE_SHIFT (ERROR_SHIFT + ERROR_SIZE)
++#define HAS_MORE_FLAG (1ULL << HAS_MORE_SHIFT)
++
++struct fsif_chmod_request {
++ uint32_t fd;
++ int32_t mode;
++};
++
++struct fsif_space_request {
++ grant_ref_t gref;
++};
++
++struct fsif_sync_request {
++ uint32_t fd;
++};
++
++
++/* FS operation request */
++struct fsif_request {
++ uint8_t type; /* Type of the request */
++ uint8_t pad;
++ uint16_t id; /* Request ID, copied to the response */
++ uint32_t pad2;
++ union {
++ struct fsif_open_request fopen;
++ struct fsif_close_request fclose;
++ struct fsif_read_request fread;
++ struct fsif_write_request fwrite;
++ struct fsif_stat_request fstat;
++ struct fsif_truncate_request ftruncate;
++ struct fsif_remove_request fremove;
++ struct fsif_rename_request frename;
++ struct fsif_create_request fcreate;
++ struct fsif_list_request flist;
++ struct fsif_chmod_request fchmod;
++ struct fsif_space_request fspace;
++ struct fsif_sync_request fsync;
++ } u;
++};
++typedef struct fsif_request fsif_request_t;
++
++/* FS operation response */
++struct fsif_response {
++ uint16_t id;
++ uint16_t pad1;
++ uint32_t pad2;
++ union {
++ uint64_t ret_val;
++ struct fsif_stat_response fstat;
++ };
++};
++
++typedef struct fsif_response fsif_response_t;
++
++#define FSIF_RING_ENTRY_SIZE 64
++
++#define FSIF_NR_READ_GNTS ((FSIF_RING_ENTRY_SIZE - sizeof(struct fsif_read_request)) / \
++ sizeof(grant_ref_t) + 1)
++#define FSIF_NR_WRITE_GNTS ((FSIF_RING_ENTRY_SIZE - sizeof(struct fsif_write_request)) / \
++ sizeof(grant_ref_t) + 1)
++
++DEFINE_RING_TYPES(fsif, struct fsif_request, struct fsif_response);
++
++#define STATE_INITIALISED "init"
++#define STATE_READY "ready"
++
++
++
++#endif
+Index: head-2008-11-25/include/xen/interface/io/pciif.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/io/pciif.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,101 @@
++/*
++ * PCI Backend/Frontend Common Data Structures & Macros
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
++ */
++#ifndef __XEN_PCI_COMMON_H__
++#define __XEN_PCI_COMMON_H__
++
++/* Be sure to bump this number if you change this file */
++#define XEN_PCI_MAGIC "7"
++
++/* xen_pci_sharedinfo flags */
++#define _XEN_PCIF_active (0)
++#define XEN_PCIF_active (1<<_XEN_PCI_active)
++
++/* xen_pci_op commands */
++#define XEN_PCI_OP_conf_read (0)
++#define XEN_PCI_OP_conf_write (1)
++#define XEN_PCI_OP_enable_msi (2)
++#define XEN_PCI_OP_disable_msi (3)
++#define XEN_PCI_OP_enable_msix (4)
++#define XEN_PCI_OP_disable_msix (5)
++
++/* xen_pci_op error numbers */
++#define XEN_PCI_ERR_success (0)
++#define XEN_PCI_ERR_dev_not_found (-1)
++#define XEN_PCI_ERR_invalid_offset (-2)
++#define XEN_PCI_ERR_access_denied (-3)
++#define XEN_PCI_ERR_not_implemented (-4)
++/* XEN_PCI_ERR_op_failed - backend failed to complete the operation */
++#define XEN_PCI_ERR_op_failed (-5)
++
++/*
++ * it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry))
++ * Should not exceed 128
++ */
++#define SH_INFO_MAX_VEC 128
++
++struct xen_msix_entry {
++ uint16_t vector;
++ uint16_t entry;
++};
++struct xen_pci_op {
++ /* IN: what action to perform: XEN_PCI_OP_* */
++ uint32_t cmd;
++
++ /* OUT: will contain an error number (if any) from errno.h */
++ int32_t err;
++
++ /* IN: which device to touch */
++ uint32_t domain; /* PCI Domain/Segment */
++ uint32_t bus;
++ uint32_t devfn;
++
++ /* IN: which configuration registers to touch */
++ int32_t offset;
++ int32_t size;
++
++ /* IN/OUT: Contains the result after a READ or the value to WRITE */
++ uint32_t value;
++ /* IN: Contains extra infor for this operation */
++ uint32_t info;
++ /*IN: param for msi-x */
++ struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC];
++};
++
++struct xen_pci_sharedinfo {
++ /* flags - XEN_PCIF_* */
++ uint32_t flags;
++ struct xen_pci_op op;
++};
++
++#endif /* __XEN_PCI_COMMON_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/tpmif.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/io/tpmif.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,77 @@
++/******************************************************************************
++ * tpmif.h
++ *
++ * TPM I/O interface for Xen guest OSes.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2005, IBM Corporation
++ *
++ * Author: Stefan Berger, stefanb@us.ibm.com
++ * Grant table support: Mahadevan Gomathisankaran
++ *
++ * This code has been derived from tools/libxc/xen/io/netif.h
++ *
++ * Copyright (c) 2003-2004, Keir Fraser
++ */
++
++#ifndef __XEN_PUBLIC_IO_TPMIF_H__
++#define __XEN_PUBLIC_IO_TPMIF_H__
++
++#include "../grant_table.h"
++
++struct tpmif_tx_request {
++ unsigned long addr; /* Machine address of packet. */
++ grant_ref_t ref; /* grant table access reference */
++ uint16_t unused;
++ uint16_t size; /* Packet size in bytes. */
++};
++typedef struct tpmif_tx_request tpmif_tx_request_t;
++
++/*
++ * The TPMIF_TX_RING_SIZE defines the number of pages the
++ * front-end and backend can exchange (= size of array).
++ */
++typedef uint32_t TPMIF_RING_IDX;
++
++#define TPMIF_TX_RING_SIZE 1
++
++/* This structure must fit in a memory page. */
++
++struct tpmif_ring {
++ struct tpmif_tx_request req;
++};
++typedef struct tpmif_ring tpmif_ring_t;
++
++struct tpmif_tx_interface {
++ struct tpmif_ring ring[TPMIF_TX_RING_SIZE];
++};
++typedef struct tpmif_tx_interface tpmif_tx_interface_t;
++
++#endif
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/vscsiif.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/io/vscsiif.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,105 @@
++/******************************************************************************
++ * vscsiif.h
++ *
++ * Based on the blkif.h code.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright(c) FUJITSU Limited 2008.
++ */
++
++#ifndef __XEN__PUBLIC_IO_SCSI_H__
++#define __XEN__PUBLIC_IO_SCSI_H__
++
++#include "ring.h"
++#include "../grant_table.h"
++
++/* command between backend and frontend */
++#define VSCSIIF_ACT_SCSI_CDB 1 /* SCSI CDB command */
++#define VSCSIIF_ACT_SCSI_ABORT 2 /* SCSI Device(Lun) Abort*/
++#define VSCSIIF_ACT_SCSI_RESET 3 /* SCSI Device(Lun) Reset*/
++
++
++#define VSCSIIF_BACK_MAX_PENDING_REQS 128
++
++/*
++ * Maximum scatter/gather segments per request.
++ *
++ * Considering balance between allocating al least 16 "vscsiif_request"
++ * structures on one page (4096bytes) and number of scatter gather
++ * needed, we decided to use 26 as a magic number.
++ */
++#define VSCSIIF_SG_TABLESIZE 26
++
++/*
++ * base on linux kernel 2.6.18
++ */
++#define VSCSIIF_MAX_COMMAND_SIZE 16
++#define VSCSIIF_SENSE_BUFFERSIZE 96
++
++
++struct vscsiif_request {
++ uint16_t rqid; /* private guest value, echoed in resp */
++ uint8_t act; /* command between backend and frontend */
++ uint8_t cmd_len;
++
++ uint8_t cmnd[VSCSIIF_MAX_COMMAND_SIZE];
++ uint16_t timeout_per_command; /* The command is issued by twice
++ the value in Backend. */
++ uint16_t channel, id, lun;
++ uint16_t padding;
++ uint8_t sc_data_direction; /* for DMA_TO_DEVICE(1)
++ DMA_FROM_DEVICE(2)
++ DMA_NONE(3) requests */
++ uint8_t nr_segments; /* Number of pieces of scatter-gather */
++
++ struct scsiif_request_segment {
++ grant_ref_t gref;
++ uint16_t offset;
++ uint16_t length;
++ } seg[VSCSIIF_SG_TABLESIZE];
++ uint32_t reserved[3];
++};
++typedef struct vscsiif_request vscsiif_request_t;
++
++struct vscsiif_response {
++ uint16_t rqid;
++ uint8_t padding;
++ uint8_t sense_len;
++ uint8_t sense_buffer[VSCSIIF_SENSE_BUFFERSIZE];
++ int32_t rslt;
++ uint32_t residual_len; /* request bufflen -
++ return the value from physical device */
++ uint32_t reserved[36];
++};
++typedef struct vscsiif_response vscsiif_response_t;
++
++DEFINE_RING_TYPES(vscsiif, struct vscsiif_request, struct vscsiif_response);
++
++
++#endif /*__XEN__PUBLIC_IO_SCSI_H__*/
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/kexec.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/kexec.h 2008-11-25 12:22:34.000000000 +0100
+@@ -0,0 +1,168 @@
++/******************************************************************************
++ * kexec.h - Public portion
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Xen port written by:
++ * - Simon 'Horms' Horman <horms@verge.net.au>
++ * - Magnus Damm <magnus@valinux.co.jp>
++ */
++
++#ifndef _XEN_PUBLIC_KEXEC_H
++#define _XEN_PUBLIC_KEXEC_H
++
++
++/* This file describes the Kexec / Kdump hypercall interface for Xen.
++ *
++ * Kexec under vanilla Linux allows a user to reboot the physical machine
++ * into a new user-specified kernel. The Xen port extends this idea
++ * to allow rebooting of the machine from dom0. When kexec for dom0
++ * is used to reboot, both the hypervisor and the domains get replaced
++ * with some other kernel. It is possible to kexec between vanilla
++ * Linux and Xen and back again. Xen to Xen works well too.
++ *
++ * The hypercall interface for kexec can be divided into three main
++ * types of hypercall operations:
++ *
++ * 1) Range information:
++ * This is used by the dom0 kernel to ask the hypervisor about various
++ * address information. This information is needed to allow kexec-tools
++ * to fill in the ELF headers for /proc/vmcore properly.
++ *
++ * 2) Load and unload of images:
++ * There are no big surprises here, the kexec binary from kexec-tools
++ * runs in userspace in dom0. The tool loads/unloads data into the
++ * dom0 kernel such as new kernel, initramfs and hypervisor. When
++ * loaded the dom0 kernel performs a load hypercall operation, and
++ * before releasing all page references the dom0 kernel calls unload.
++ *
++ * 3) Kexec operation:
++ * This is used to start a previously loaded kernel.
++ */
++
++#include "xen.h"
++
++#if defined(__i386__) || defined(__x86_64__)
++#define KEXEC_XEN_NO_PAGES 17
++#endif
++
++/*
++ * Prototype for this hypercall is:
++ * int kexec_op(int cmd, void *args)
++ * @cmd == KEXEC_CMD_...
++ * KEXEC operation to perform
++ * @args == Operation-specific extra arguments (NULL if none).
++ */
++
++/*
++ * Kexec supports two types of operation:
++ * - kexec into a regular kernel, very similar to a standard reboot
++ * - KEXEC_TYPE_DEFAULT is used to specify this type
++ * - kexec into a special "crash kernel", aka kexec-on-panic
++ * - KEXEC_TYPE_CRASH is used to specify this type
++ * - parts of our system may be broken at kexec-on-panic time
++ * - the code should be kept as simple and self-contained as possible
++ */
++
++#define KEXEC_TYPE_DEFAULT 0
++#define KEXEC_TYPE_CRASH 1
++
++
++/* The kexec implementation for Xen allows the user to load two
++ * types of kernels, KEXEC_TYPE_DEFAULT and KEXEC_TYPE_CRASH.
++ * All data needed for a kexec reboot is kept in one xen_kexec_image_t
++ * per "instance". The data mainly consists of machine address lists to pages
++ * together with destination addresses. The data in xen_kexec_image_t
++ * is passed to the "code page" which is one page of code that performs
++ * the final relocations before jumping to the new kernel.
++ */
++
++typedef struct xen_kexec_image {
++#if defined(__i386__) || defined(__x86_64__)
++ unsigned long page_list[KEXEC_XEN_NO_PAGES];
++#endif
++#if defined(__ia64__)
++ unsigned long reboot_code_buffer;
++#endif
++ unsigned long indirection_page;
++ unsigned long start_address;
++} xen_kexec_image_t;
++
++/*
++ * Perform kexec having previously loaded a kexec or kdump kernel
++ * as appropriate.
++ * type == KEXEC_TYPE_DEFAULT or KEXEC_TYPE_CRASH [in]
++ */
++#define KEXEC_CMD_kexec 0
++typedef struct xen_kexec_exec {
++ int type;
++} xen_kexec_exec_t;
++
++/*
++ * Load/Unload kernel image for kexec or kdump.
++ * type == KEXEC_TYPE_DEFAULT or KEXEC_TYPE_CRASH [in]
++ * image == relocation information for kexec (ignored for unload) [in]
++ */
++#define KEXEC_CMD_kexec_load 1
++#define KEXEC_CMD_kexec_unload 2
++typedef struct xen_kexec_load {
++ int type;
++ xen_kexec_image_t image;
++} xen_kexec_load_t;
++
++#define KEXEC_RANGE_MA_CRASH 0 /* machine address and size of crash area */
++#define KEXEC_RANGE_MA_XEN 1 /* machine address and size of Xen itself */
++#define KEXEC_RANGE_MA_CPU 2 /* machine address and size of a CPU note */
++#define KEXEC_RANGE_MA_XENHEAP 3 /* machine address and size of xenheap
++ * Note that although this is adjacent
++ * to Xen it exists in a separate EFI
++ * region on ia64, and thus needs to be
++ * inserted into iomem_machine separately */
++#define KEXEC_RANGE_MA_BOOT_PARAM 4 /* machine address and size of
++ * the ia64_boot_param */
++#define KEXEC_RANGE_MA_EFI_MEMMAP 5 /* machine address and size of
++ * of the EFI Memory Map */
++#define KEXEC_RANGE_MA_VMCOREINFO 6 /* machine address and size of vmcoreinfo */
++
++/*
++ * Find the address and size of certain memory areas
++ * range == KEXEC_RANGE_... [in]
++ * nr == physical CPU number (starting from 0) if KEXEC_RANGE_MA_CPU [in]
++ * size == number of bytes reserved in window [out]
++ * start == address of the first byte in the window [out]
++ */
++#define KEXEC_CMD_kexec_get_range 3
++typedef struct xen_kexec_range {
++ int range;
++ int nr;
++ unsigned long size;
++ unsigned long start;
++} xen_kexec_range_t;
++
++#endif /* _XEN_PUBLIC_KEXEC_H */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/libelf.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/libelf.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,265 @@
++/******************************************************************************
++ * libelf.h
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
++#ifndef __XC_LIBELF__
++#define __XC_LIBELF__ 1
++
++#if defined(__i386__) || defined(__x86_64__) || defined(__ia64__)
++#define XEN_ELF_LITTLE_ENDIAN
++#else
++#error define architectural endianness
++#endif
++
++#undef ELFSIZE
++#include "elfnote.h"
++#include "elfstructs.h"
++#include "features.h"
++
++/* ------------------------------------------------------------------------ */
++
++typedef union {
++ Elf32_Ehdr e32;
++ Elf64_Ehdr e64;
++} elf_ehdr;
++
++typedef union {
++ Elf32_Phdr e32;
++ Elf64_Phdr e64;
++} elf_phdr;
++
++typedef union {
++ Elf32_Shdr e32;
++ Elf64_Shdr e64;
++} elf_shdr;
++
++typedef union {
++ Elf32_Sym e32;
++ Elf64_Sym e64;
++} elf_sym;
++
++typedef union {
++ Elf32_Rel e32;
++ Elf64_Rel e64;
++} elf_rel;
++
++typedef union {
++ Elf32_Rela e32;
++ Elf64_Rela e64;
++} elf_rela;
++
++typedef union {
++ Elf32_Note e32;
++ Elf64_Note e64;
++} elf_note;
++
++struct elf_binary {
++ /* elf binary */
++ const char *image;
++ size_t size;
++ char class;
++ char data;
++
++ const elf_ehdr *ehdr;
++ const char *sec_strtab;
++ const elf_shdr *sym_tab;
++ const char *sym_strtab;
++
++ /* loaded to */
++ char *dest;
++ uint64_t pstart;
++ uint64_t pend;
++ uint64_t reloc_offset;
++
++ uint64_t bsd_symtab_pstart;
++ uint64_t bsd_symtab_pend;
++
++#ifndef __XEN__
++ /* misc */
++ FILE *log;
++#endif
++ int verbose;
++};
++
++/* ------------------------------------------------------------------------ */
++/* accessing elf header fields */
++
++#ifdef XEN_ELF_BIG_ENDIAN
++# define NATIVE_ELFDATA ELFDATA2MSB
++#else
++# define NATIVE_ELFDATA ELFDATA2LSB
++#endif
++
++#define elf_32bit(elf) (ELFCLASS32 == (elf)->class)
++#define elf_64bit(elf) (ELFCLASS64 == (elf)->class)
++#define elf_msb(elf) (ELFDATA2MSB == (elf)->data)
++#define elf_lsb(elf) (ELFDATA2LSB == (elf)->data)
++#define elf_swap(elf) (NATIVE_ELFDATA != (elf)->data)
++
++#define elf_uval(elf, str, elem) \
++ ((ELFCLASS64 == (elf)->class) \
++ ? elf_access_unsigned((elf), (str), \
++ offsetof(typeof(*(str)),e64.elem), \
++ sizeof((str)->e64.elem)) \
++ : elf_access_unsigned((elf), (str), \
++ offsetof(typeof(*(str)),e32.elem), \
++ sizeof((str)->e32.elem)))
++
++#define elf_sval(elf, str, elem) \
++ ((ELFCLASS64 == (elf)->class) \
++ ? elf_access_signed((elf), (str), \
++ offsetof(typeof(*(str)),e64.elem), \
++ sizeof((str)->e64.elem)) \
++ : elf_access_signed((elf), (str), \
++ offsetof(typeof(*(str)),e32.elem), \
++ sizeof((str)->e32.elem)))
++
++#define elf_size(elf, str) \
++ ((ELFCLASS64 == (elf)->class) \
++ ? sizeof((str)->e64) : sizeof((str)->e32))
++
++uint64_t elf_access_unsigned(struct elf_binary *elf, const void *ptr,
++ uint64_t offset, size_t size);
++int64_t elf_access_signed(struct elf_binary *elf, const void *ptr,
++ uint64_t offset, size_t size);
++
++uint64_t elf_round_up(struct elf_binary *elf, uint64_t addr);
++
++/* ------------------------------------------------------------------------ */
++/* xc_libelf_tools.c */
++
++int elf_shdr_count(struct elf_binary *elf);
++int elf_phdr_count(struct elf_binary *elf);
++
++const elf_shdr *elf_shdr_by_name(struct elf_binary *elf, const char *name);
++const elf_shdr *elf_shdr_by_index(struct elf_binary *elf, int index);
++const elf_phdr *elf_phdr_by_index(struct elf_binary *elf, int index);
++
++const char *elf_section_name(struct elf_binary *elf, const elf_shdr * shdr);
++const void *elf_section_start(struct elf_binary *elf, const elf_shdr * shdr);
++const void *elf_section_end(struct elf_binary *elf, const elf_shdr * shdr);
++
++const void *elf_segment_start(struct elf_binary *elf, const elf_phdr * phdr);
++const void *elf_segment_end(struct elf_binary *elf, const elf_phdr * phdr);
++
++const elf_sym *elf_sym_by_name(struct elf_binary *elf, const char *symbol);
++const elf_sym *elf_sym_by_index(struct elf_binary *elf, int index);
++
++const char *elf_note_name(struct elf_binary *elf, const elf_note * note);
++const void *elf_note_desc(struct elf_binary *elf, const elf_note * note);
++uint64_t elf_note_numeric(struct elf_binary *elf, const elf_note * note);
++const elf_note *elf_note_next(struct elf_binary *elf, const elf_note * note);
++
++int elf_is_elfbinary(const void *image);
++int elf_phdr_is_loadable(struct elf_binary *elf, const elf_phdr * phdr);
++
++/* ------------------------------------------------------------------------ */
++/* xc_libelf_loader.c */
++
++int elf_init(struct elf_binary *elf, const char *image, size_t size);
++#ifdef __XEN__
++void elf_set_verbose(struct elf_binary *elf);
++#else
++void elf_set_logfile(struct elf_binary *elf, FILE * log, int verbose);
++#endif
++
++void elf_parse_binary(struct elf_binary *elf);
++void elf_load_binary(struct elf_binary *elf);
++
++void *elf_get_ptr(struct elf_binary *elf, unsigned long addr);
++uint64_t elf_lookup_addr(struct elf_binary *elf, const char *symbol);
++
++void elf_parse_bsdsyms(struct elf_binary *elf, uint64_t pstart); /* private */
++
++/* ------------------------------------------------------------------------ */
++/* xc_libelf_relocate.c */
++
++int elf_reloc(struct elf_binary *elf);
++
++/* ------------------------------------------------------------------------ */
++/* xc_libelf_dominfo.c */
++
++#define UNSET_ADDR ((uint64_t)-1)
++
++enum xen_elfnote_type {
++ XEN_ENT_NONE = 0,
++ XEN_ENT_LONG = 1,
++ XEN_ENT_STR = 2
++};
++
++struct xen_elfnote {
++ enum xen_elfnote_type type;
++ const char *name;
++ union {
++ const char *str;
++ uint64_t num;
++ } data;
++};
++
++struct elf_dom_parms {
++ /* raw */
++ const char *guest_info;
++ const void *elf_note_start;
++ const void *elf_note_end;
++ struct xen_elfnote elf_notes[XEN_ELFNOTE_MAX + 1];
++
++ /* parsed */
++ char guest_os[16];
++ char guest_ver[16];
++ char xen_ver[16];
++ char loader[16];
++ int pae;
++ int bsd_symtab;
++ uint64_t virt_base;
++ uint64_t virt_entry;
++ uint64_t virt_hypercall;
++ uint64_t virt_hv_start_low;
++ uint64_t elf_paddr_offset;
++ uint32_t f_supported[XENFEAT_NR_SUBMAPS];
++ uint32_t f_required[XENFEAT_NR_SUBMAPS];
++
++ /* calculated */
++ uint64_t virt_offset;
++ uint64_t virt_kstart;
++ uint64_t virt_kend;
++};
++
++static inline void elf_xen_feature_set(int nr, uint32_t * addr)
++{
++ addr[nr >> 5] |= 1 << (nr & 31);
++}
++static inline int elf_xen_feature_get(int nr, uint32_t * addr)
++{
++ return !!(addr[nr >> 5] & (1 << (nr & 31)));
++}
++
++int elf_xen_parse_features(const char *features,
++ uint32_t *supported,
++ uint32_t *required);
++int elf_xen_parse_note(struct elf_binary *elf,
++ struct elf_dom_parms *parms,
++ const elf_note *note);
++int elf_xen_parse_guest_info(struct elf_binary *elf,
++ struct elf_dom_parms *parms);
++int elf_xen_parse(struct elf_binary *elf,
++ struct elf_dom_parms *parms);
++
++#endif /* __XC_LIBELF__ */
+Index: head-2008-11-25/include/xen/interface/nmi.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/nmi.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,78 @@
++/******************************************************************************
++ * nmi.h
++ *
++ * NMI callback registration and reason codes.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
++ */
++
++#ifndef __XEN_PUBLIC_NMI_H__
++#define __XEN_PUBLIC_NMI_H__
++
++/*
++ * NMI reason codes:
++ * Currently these are x86-specific, stored in arch_shared_info.nmi_reason.
++ */
++ /* I/O-check error reported via ISA port 0x61, bit 6. */
++#define _XEN_NMIREASON_io_error 0
++#define XEN_NMIREASON_io_error (1UL << _XEN_NMIREASON_io_error)
++ /* Parity error reported via ISA port 0x61, bit 7. */
++#define _XEN_NMIREASON_parity_error 1
++#define XEN_NMIREASON_parity_error (1UL << _XEN_NMIREASON_parity_error)
++ /* Unknown hardware-generated NMI. */
++#define _XEN_NMIREASON_unknown 2
++#define XEN_NMIREASON_unknown (1UL << _XEN_NMIREASON_unknown)
++
++/*
++ * long nmi_op(unsigned int cmd, void *arg)
++ * NB. All ops return zero on success, else a negative error code.
++ */
++
++/*
++ * Register NMI callback for this (calling) VCPU. Currently this only makes
++ * sense for domain 0, vcpu 0. All other callers will be returned EINVAL.
++ * arg == pointer to xennmi_callback structure.
++ */
++#define XENNMI_register_callback 0
++struct xennmi_callback {
++ unsigned long handler_address;
++ unsigned long pad;
++};
++typedef struct xennmi_callback xennmi_callback_t;
++DEFINE_XEN_GUEST_HANDLE(xennmi_callback_t);
++
++/*
++ * Deregister NMI callback for this (calling) VCPU.
++ * arg == NULL.
++ */
++#define XENNMI_unregister_callback 1
++
++#endif /* __XEN_PUBLIC_NMI_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/platform.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/platform.h 2008-09-25 13:55:33.000000000 +0200
+@@ -0,0 +1,346 @@
++/******************************************************************************
++ * platform.h
++ *
++ * Hardware platform operations. Intended for use by domain-0 kernel.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2002-2006, K Fraser
++ */
++
++#ifndef __XEN_PUBLIC_PLATFORM_H__
++#define __XEN_PUBLIC_PLATFORM_H__
++
++#include "xen.h"
++
++#define XENPF_INTERFACE_VERSION 0x03000001
++
++/*
++ * Set clock such that it would read <secs,nsecs> after 00:00:00 UTC,
++ * 1 January, 1970 if the current system time was <system_time>.
++ */
++#define XENPF_settime 17
++struct xenpf_settime {
++ /* IN variables. */
++ uint32_t secs;
++ uint32_t nsecs;
++ uint64_t system_time;
++};
++typedef struct xenpf_settime xenpf_settime_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_settime_t);
++
++/*
++ * Request memory range (@mfn, @mfn+@nr_mfns-1) to have type @type.
++ * On x86, @type is an architecture-defined MTRR memory type.
++ * On success, returns the MTRR that was used (@reg) and a handle that can
++ * be passed to XENPF_DEL_MEMTYPE to accurately tear down the new setting.
++ * (x86-specific).
++ */
++#define XENPF_add_memtype 31
++struct xenpf_add_memtype {
++ /* IN variables. */
++ xen_pfn_t mfn;
++ uint64_t nr_mfns;
++ uint32_t type;
++ /* OUT variables. */
++ uint32_t handle;
++ uint32_t reg;
++};
++typedef struct xenpf_add_memtype xenpf_add_memtype_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_add_memtype_t);
++
++/*
++ * Tear down an existing memory-range type. If @handle is remembered then it
++ * should be passed in to accurately tear down the correct setting (in case
++ * of overlapping memory regions with differing types). If it is not known
++ * then @handle should be set to zero. In all cases @reg must be set.
++ * (x86-specific).
++ */
++#define XENPF_del_memtype 32
++struct xenpf_del_memtype {
++ /* IN variables. */
++ uint32_t handle;
++ uint32_t reg;
++};
++typedef struct xenpf_del_memtype xenpf_del_memtype_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_del_memtype_t);
++
++/* Read current type of an MTRR (x86-specific). */
++#define XENPF_read_memtype 33
++struct xenpf_read_memtype {
++ /* IN variables. */
++ uint32_t reg;
++ /* OUT variables. */
++ xen_pfn_t mfn;
++ uint64_t nr_mfns;
++ uint32_t type;
++};
++typedef struct xenpf_read_memtype xenpf_read_memtype_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_read_memtype_t);
++
++#define XENPF_microcode_update 35
++struct xenpf_microcode_update {
++ /* IN variables. */
++ XEN_GUEST_HANDLE(const_void) data;/* Pointer to microcode data */
++ uint32_t length; /* Length of microcode data. */
++};
++typedef struct xenpf_microcode_update xenpf_microcode_update_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_microcode_update_t);
++
++#define XENPF_platform_quirk 39
++#define QUIRK_NOIRQBALANCING 1 /* Do not restrict IO-APIC RTE targets */
++#define QUIRK_IOAPIC_BAD_REGSEL 2 /* IO-APIC REGSEL forgets its value */
++#define QUIRK_IOAPIC_GOOD_REGSEL 3 /* IO-APIC REGSEL behaves properly */
++struct xenpf_platform_quirk {
++ /* IN variables. */
++ uint32_t quirk_id;
++};
++typedef struct xenpf_platform_quirk xenpf_platform_quirk_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_platform_quirk_t);
++
++#define XENPF_firmware_info 50
++#define XEN_FW_DISK_INFO 1 /* from int 13 AH=08/41/48 */
++#define XEN_FW_DISK_MBR_SIGNATURE 2 /* from MBR offset 0x1b8 */
++#define XEN_FW_VBEDDC_INFO 3 /* from int 10 AX=4f15 */
++struct xenpf_firmware_info {
++ /* IN variables. */
++ uint32_t type;
++ uint32_t index;
++ /* OUT variables. */
++ union {
++ struct {
++ /* Int13, Fn48: Check Extensions Present. */
++ uint8_t device; /* %dl: bios device number */
++ uint8_t version; /* %ah: major version */
++ uint16_t interface_support; /* %cx: support bitmap */
++ /* Int13, Fn08: Legacy Get Device Parameters. */
++ uint16_t legacy_max_cylinder; /* %cl[7:6]:%ch: max cyl # */
++ uint8_t legacy_max_head; /* %dh: max head # */
++ uint8_t legacy_sectors_per_track; /* %cl[5:0]: max sector # */
++ /* Int13, Fn41: Get Device Parameters (as filled into %ds:%esi). */
++ /* NB. First uint16_t of buffer must be set to buffer size. */
++ XEN_GUEST_HANDLE(void) edd_params;
++ } disk_info; /* XEN_FW_DISK_INFO */
++ struct {
++ uint8_t device; /* bios device number */
++ uint32_t mbr_signature; /* offset 0x1b8 in mbr */
++ } disk_mbr_signature; /* XEN_FW_DISK_MBR_SIGNATURE */
++ struct {
++ /* Int10, AX=4F15: Get EDID info. */
++ uint8_t capabilities;
++ uint8_t edid_transfer_time;
++ /* must refer to 128-byte buffer */
++ XEN_GUEST_HANDLE(uint8) edid;
++ } vbeddc_info; /* XEN_FW_VBEDDC_INFO */
++ } u;
++};
++typedef struct xenpf_firmware_info xenpf_firmware_info_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_firmware_info_t);
++
++#define XENPF_enter_acpi_sleep 51
++struct xenpf_enter_acpi_sleep {
++ /* IN variables */
++ uint16_t pm1a_cnt_val; /* PM1a control value. */
++ uint16_t pm1b_cnt_val; /* PM1b control value. */
++ uint32_t sleep_state; /* Which state to enter (Sn). */
++ uint32_t flags; /* Must be zero. */
++};
++typedef struct xenpf_enter_acpi_sleep xenpf_enter_acpi_sleep_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_enter_acpi_sleep_t);
++
++#define XENPF_change_freq 52
++struct xenpf_change_freq {
++ /* IN variables */
++ uint32_t flags; /* Must be zero. */
++ uint32_t cpu; /* Physical cpu. */
++ uint64_t freq; /* New frequency (Hz). */
++};
++typedef struct xenpf_change_freq xenpf_change_freq_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_change_freq_t);
++
++/*
++ * Get idle times (nanoseconds since boot) for physical CPUs specified in the
++ * @cpumap_bitmap with range [0..@cpumap_nr_cpus-1]. The @idletime array is
++ * indexed by CPU number; only entries with the corresponding @cpumap_bitmap
++ * bit set are written to. On return, @cpumap_bitmap is modified so that any
++ * non-existent CPUs are cleared. Such CPUs have their @idletime array entry
++ * cleared.
++ */
++#define XENPF_getidletime 53
++struct xenpf_getidletime {
++ /* IN/OUT variables */
++ /* IN: CPUs to interrogate; OUT: subset of IN which are present */
++ XEN_GUEST_HANDLE(uint8) cpumap_bitmap;
++ /* IN variables */
++ /* Size of cpumap bitmap. */
++ uint32_t cpumap_nr_cpus;
++ /* Must be indexable for every cpu in cpumap_bitmap. */
++ XEN_GUEST_HANDLE(uint64) idletime;
++ /* OUT variables */
++ /* System time when the idletime snapshots were taken. */
++ uint64_t now;
++};
++typedef struct xenpf_getidletime xenpf_getidletime_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_getidletime_t);
++
++#define XENPF_set_processor_pminfo 54
++
++/* ability bits */
++#define XEN_PROCESSOR_PM_CX 1
++#define XEN_PROCESSOR_PM_PX 2
++#define XEN_PROCESSOR_PM_TX 4
++
++/* cmd type */
++#define XEN_PM_CX 0
++#define XEN_PM_PX 1
++#define XEN_PM_TX 2
++
++/* Px sub info type */
++#define XEN_PX_PCT 1
++#define XEN_PX_PSS 2
++#define XEN_PX_PPC 4
++#define XEN_PX_PSD 8
++
++struct xen_power_register {
++ uint32_t space_id;
++ uint32_t bit_width;
++ uint32_t bit_offset;
++ uint32_t access_size;
++ uint64_t address;
++};
++
++struct xen_processor_csd {
++ uint32_t domain; /* domain number of one dependent group */
++ uint32_t coord_type; /* coordination type */
++ uint32_t num; /* number of processors in same domain */
++};
++typedef struct xen_processor_csd xen_processor_csd_t;
++DEFINE_XEN_GUEST_HANDLE(xen_processor_csd_t);
++
++struct xen_processor_cx {
++ struct xen_power_register reg; /* GAS for Cx trigger register */
++ uint8_t type; /* cstate value, c0: 0, c1: 1, ... */
++ uint32_t latency; /* worst latency (ms) to enter/exit this cstate */
++ uint32_t power; /* average power consumption(mW) */
++ uint32_t dpcnt; /* number of dependency entries */
++ XEN_GUEST_HANDLE(xen_processor_csd_t) dp; /* NULL if no dependency */
++};
++typedef struct xen_processor_cx xen_processor_cx_t;
++DEFINE_XEN_GUEST_HANDLE(xen_processor_cx_t);
++
++struct xen_processor_flags {
++ uint32_t bm_control:1;
++ uint32_t bm_check:1;
++ uint32_t has_cst:1;
++ uint32_t power_setup_done:1;
++ uint32_t bm_rld_set:1;
++};
++
++struct xen_processor_power {
++ uint32_t count; /* number of C state entries in array below */
++ struct xen_processor_flags flags; /* global flags of this processor */
++ XEN_GUEST_HANDLE(xen_processor_cx_t) states; /* supported c states */
++};
++
++struct xen_pct_register {
++ uint8_t descriptor;
++ uint16_t length;
++ uint8_t space_id;
++ uint8_t bit_width;
++ uint8_t bit_offset;
++ uint8_t reserved;
++ uint64_t address;
++};
++
++struct xen_processor_px {
++ uint64_t core_frequency; /* megahertz */
++ uint64_t power; /* milliWatts */
++ uint64_t transition_latency; /* microseconds */
++ uint64_t bus_master_latency; /* microseconds */
++ uint64_t control; /* control value */
++ uint64_t status; /* success indicator */
++};
++typedef struct xen_processor_px xen_processor_px_t;
++DEFINE_XEN_GUEST_HANDLE(xen_processor_px_t);
++
++struct xen_psd_package {
++ uint64_t num_entries;
++ uint64_t revision;
++ uint64_t domain;
++ uint64_t coord_type;
++ uint64_t num_processors;
++};
++
++struct xen_processor_performance {
++ uint32_t flags; /* flag for Px sub info type */
++ uint32_t platform_limit; /* Platform limitation on freq usage */
++ struct xen_pct_register control_register;
++ struct xen_pct_register status_register;
++ uint32_t state_count; /* total available performance states */
++ XEN_GUEST_HANDLE(xen_processor_px_t) states;
++ struct xen_psd_package domain_info;
++ uint32_t shared_type; /* coordination type of this processor */
++};
++typedef struct xen_processor_performance xen_processor_performance_t;
++DEFINE_XEN_GUEST_HANDLE(xen_processor_performance_t);
++
++struct xenpf_set_processor_pminfo {
++ /* IN variables */
++ uint32_t id; /* ACPI CPU ID */
++ uint32_t type; /* {XEN_PM_CX, XEN_PM_PX} */
++ union {
++ struct xen_processor_power power;/* Cx: _CST/_CSD */
++ struct xen_processor_performance perf; /* Px: _PPC/_PCT/_PSS/_PSD */
++ };
++};
++typedef struct xenpf_set_processor_pminfo xenpf_set_processor_pminfo_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_set_processor_pminfo_t);
++
++struct xen_platform_op {
++ uint32_t cmd;
++ uint32_t interface_version; /* XENPF_INTERFACE_VERSION */
++ union {
++ struct xenpf_settime settime;
++ struct xenpf_add_memtype add_memtype;
++ struct xenpf_del_memtype del_memtype;
++ struct xenpf_read_memtype read_memtype;
++ struct xenpf_microcode_update microcode;
++ struct xenpf_platform_quirk platform_quirk;
++ struct xenpf_firmware_info firmware_info;
++ struct xenpf_enter_acpi_sleep enter_acpi_sleep;
++ struct xenpf_change_freq change_freq;
++ struct xenpf_getidletime getidletime;
++ struct xenpf_set_processor_pminfo set_pminfo;
++ uint8_t pad[128];
++ } u;
++};
++typedef struct xen_platform_op xen_platform_op_t;
++DEFINE_XEN_GUEST_HANDLE(xen_platform_op_t);
++
++#endif /* __XEN_PUBLIC_PLATFORM_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/sysctl.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/sysctl.h 2008-09-25 13:55:33.000000000 +0200
+@@ -0,0 +1,308 @@
++/******************************************************************************
++ * sysctl.h
++ *
++ * System management operations. For use by node control stack.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2002-2006, K Fraser
++ */
++
++#ifndef __XEN_PUBLIC_SYSCTL_H__
++#define __XEN_PUBLIC_SYSCTL_H__
++
++#if !defined(__XEN__) && !defined(__XEN_TOOLS__)
++#error "sysctl operations are intended for use by node control tools only"
++#endif
++
++#include "xen.h"
++#include "domctl.h"
++
++#define XEN_SYSCTL_INTERFACE_VERSION 0x00000006
++
++/*
++ * Read console content from Xen buffer ring.
++ */
++#define XEN_SYSCTL_readconsole 1
++struct xen_sysctl_readconsole {
++ /* IN: Non-zero -> clear after reading. */
++ uint8_t clear;
++ /* IN: Non-zero -> start index specified by @index field. */
++ uint8_t incremental;
++ uint8_t pad0, pad1;
++ /*
++ * IN: Start index for consuming from ring buffer (if @incremental);
++ * OUT: End index after consuming from ring buffer.
++ */
++ uint32_t index;
++ /* IN: Virtual address to write console data. */
++ XEN_GUEST_HANDLE_64(char) buffer;
++ /* IN: Size of buffer; OUT: Bytes written to buffer. */
++ uint32_t count;
++};
++typedef struct xen_sysctl_readconsole xen_sysctl_readconsole_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_readconsole_t);
++
++/* Get trace buffers machine base address */
++#define XEN_SYSCTL_tbuf_op 2
++struct xen_sysctl_tbuf_op {
++ /* IN variables */
++#define XEN_SYSCTL_TBUFOP_get_info 0
++#define XEN_SYSCTL_TBUFOP_set_cpu_mask 1
++#define XEN_SYSCTL_TBUFOP_set_evt_mask 2
++#define XEN_SYSCTL_TBUFOP_set_size 3
++#define XEN_SYSCTL_TBUFOP_enable 4
++#define XEN_SYSCTL_TBUFOP_disable 5
++ uint32_t cmd;
++ /* IN/OUT variables */
++ struct xenctl_cpumap cpu_mask;
++ uint32_t evt_mask;
++ /* OUT variables */
++ uint64_aligned_t buffer_mfn;
++ uint32_t size;
++};
++typedef struct xen_sysctl_tbuf_op xen_sysctl_tbuf_op_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_tbuf_op_t);
++
++/*
++ * Get physical information about the host machine
++ */
++#define XEN_SYSCTL_physinfo 3
++ /* (x86) The platform supports HVM guests. */
++#define _XEN_SYSCTL_PHYSCAP_hvm 0
++#define XEN_SYSCTL_PHYSCAP_hvm (1u<<_XEN_SYSCTL_PHYSCAP_hvm)
++ /* (x86) The platform supports HVM-guest direct access to I/O devices. */
++#define _XEN_SYSCTL_PHYSCAP_hvm_directio 1
++#define XEN_SYSCTL_PHYSCAP_hvm_directio (1u<<_XEN_SYSCTL_PHYSCAP_hvm_directio)
++struct xen_sysctl_physinfo {
++ uint32_t threads_per_core;
++ uint32_t cores_per_socket;
++ uint32_t nr_cpus;
++ uint32_t nr_nodes;
++ uint32_t cpu_khz;
++ uint64_aligned_t total_pages;
++ uint64_aligned_t free_pages;
++ uint64_aligned_t scrub_pages;
++ uint32_t hw_cap[8];
++
++ /*
++ * IN: maximum addressable entry in the caller-provided cpu_to_node array.
++ * OUT: largest cpu identifier in the system.
++ * If OUT is greater than IN then the cpu_to_node array is truncated!
++ */
++ uint32_t max_cpu_id;
++ /*
++ * If not NULL, this array is filled with node identifier for each cpu.
++ * If a cpu has no node information (e.g., cpu not present) then the
++ * sentinel value ~0u is written.
++ * The size of this array is specified by the caller in @max_cpu_id.
++ * If the actual @max_cpu_id is smaller than the array then the trailing
++ * elements of the array will not be written by the sysctl.
++ */
++ XEN_GUEST_HANDLE_64(uint32) cpu_to_node;
++
++ /* XEN_SYSCTL_PHYSCAP_??? */
++ uint32_t capabilities;
++};
++typedef struct xen_sysctl_physinfo xen_sysctl_physinfo_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_physinfo_t);
++
++/*
++ * Get the ID of the current scheduler.
++ */
++#define XEN_SYSCTL_sched_id 4
++struct xen_sysctl_sched_id {
++ /* OUT variable */
++ uint32_t sched_id;
++};
++typedef struct xen_sysctl_sched_id xen_sysctl_sched_id_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_sched_id_t);
++
++/* Interface for controlling Xen software performance counters. */
++#define XEN_SYSCTL_perfc_op 5
++/* Sub-operations: */
++#define XEN_SYSCTL_PERFCOP_reset 1 /* Reset all counters to zero. */
++#define XEN_SYSCTL_PERFCOP_query 2 /* Get perfctr information. */
++struct xen_sysctl_perfc_desc {
++ char name[80]; /* name of perf counter */
++ uint32_t nr_vals; /* number of values for this counter */
++};
++typedef struct xen_sysctl_perfc_desc xen_sysctl_perfc_desc_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_perfc_desc_t);
++typedef uint32_t xen_sysctl_perfc_val_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_perfc_val_t);
++
++struct xen_sysctl_perfc_op {
++ /* IN variables. */
++ uint32_t cmd; /* XEN_SYSCTL_PERFCOP_??? */
++ /* OUT variables. */
++ uint32_t nr_counters; /* number of counters description */
++ uint32_t nr_vals; /* number of values */
++ /* counter information (or NULL) */
++ XEN_GUEST_HANDLE_64(xen_sysctl_perfc_desc_t) desc;
++ /* counter values (or NULL) */
++ XEN_GUEST_HANDLE_64(xen_sysctl_perfc_val_t) val;
++};
++typedef struct xen_sysctl_perfc_op xen_sysctl_perfc_op_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_perfc_op_t);
++
++#define XEN_SYSCTL_getdomaininfolist 6
++struct xen_sysctl_getdomaininfolist {
++ /* IN variables. */
++ domid_t first_domain;
++ uint32_t max_domains;
++ XEN_GUEST_HANDLE_64(xen_domctl_getdomaininfo_t) buffer;
++ /* OUT variables. */
++ uint32_t num_domains;
++};
++typedef struct xen_sysctl_getdomaininfolist xen_sysctl_getdomaininfolist_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_getdomaininfolist_t);
++
++/* Inject debug keys into Xen. */
++#define XEN_SYSCTL_debug_keys 7
++struct xen_sysctl_debug_keys {
++ /* IN variables. */
++ XEN_GUEST_HANDLE_64(char) keys;
++ uint32_t nr_keys;
++};
++typedef struct xen_sysctl_debug_keys xen_sysctl_debug_keys_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_debug_keys_t);
++
++/* Get physical CPU information. */
++#define XEN_SYSCTL_getcpuinfo 8
++struct xen_sysctl_cpuinfo {
++ uint64_aligned_t idletime;
++};
++typedef struct xen_sysctl_cpuinfo xen_sysctl_cpuinfo_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_cpuinfo_t);
++struct xen_sysctl_getcpuinfo {
++ /* IN variables. */
++ uint32_t max_cpus;
++ XEN_GUEST_HANDLE_64(xen_sysctl_cpuinfo_t) info;
++ /* OUT variables. */
++ uint32_t nr_cpus;
++};
++typedef struct xen_sysctl_getcpuinfo xen_sysctl_getcpuinfo_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_getcpuinfo_t);
++
++#define XEN_SYSCTL_availheap 9
++struct xen_sysctl_availheap {
++ /* IN variables. */
++ uint32_t min_bitwidth; /* Smallest address width (zero if don't care). */
++ uint32_t max_bitwidth; /* Largest address width (zero if don't care). */
++ int32_t node; /* NUMA node of interest (-1 for all nodes). */
++ /* OUT variables. */
++ uint64_aligned_t avail_bytes;/* Bytes available in the specified region. */
++};
++typedef struct xen_sysctl_availheap xen_sysctl_availheap_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_availheap_t);
++
++#define XEN_SYSCTL_get_pmstat 10
++struct pm_px_val {
++ uint64_aligned_t freq; /* Px core frequency */
++ uint64_aligned_t residency; /* Px residency time */
++ uint64_aligned_t count; /* Px transition count */
++};
++typedef struct pm_px_val pm_px_val_t;
++DEFINE_XEN_GUEST_HANDLE(pm_px_val_t);
++
++struct pm_px_stat {
++ uint8_t total; /* total Px states */
++ uint8_t usable; /* usable Px states */
++ uint8_t last; /* last Px state */
++ uint8_t cur; /* current Px state */
++ XEN_GUEST_HANDLE_64(uint64) trans_pt; /* Px transition table */
++ XEN_GUEST_HANDLE_64(pm_px_val_t) pt;
++};
++typedef struct pm_px_stat pm_px_stat_t;
++DEFINE_XEN_GUEST_HANDLE(pm_px_stat_t);
++
++struct pm_cx_stat {
++ uint32_t nr; /* entry nr in triggers & residencies, including C0 */
++ uint32_t last; /* last Cx state */
++ uint64_aligned_t idle_time; /* idle time from boot */
++ XEN_GUEST_HANDLE_64(uint64) triggers; /* Cx trigger counts */
++ XEN_GUEST_HANDLE_64(uint64) residencies; /* Cx residencies */
++};
++
++struct xen_sysctl_get_pmstat {
++#define PMSTAT_CATEGORY_MASK 0xf0
++#define PMSTAT_PX 0x10
++#define PMSTAT_CX 0x20
++#define PMSTAT_get_max_px (PMSTAT_PX | 0x1)
++#define PMSTAT_get_pxstat (PMSTAT_PX | 0x2)
++#define PMSTAT_reset_pxstat (PMSTAT_PX | 0x3)
++#define PMSTAT_get_max_cx (PMSTAT_CX | 0x1)
++#define PMSTAT_get_cxstat (PMSTAT_CX | 0x2)
++#define PMSTAT_reset_cxstat (PMSTAT_CX | 0x3)
++ uint32_t type;
++ uint32_t cpuid;
++ union {
++ struct pm_px_stat getpx;
++ struct pm_cx_stat getcx;
++ /* other struct for tx, etc */
++ } u;
++};
++typedef struct xen_sysctl_get_pmstat xen_sysctl_get_pmstat_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_get_pmstat_t);
++
++#define XEN_SYSCTL_cpu_hotplug 11
++struct xen_sysctl_cpu_hotplug {
++ /* IN variables */
++ uint32_t cpu; /* Physical cpu. */
++#define XEN_SYSCTL_CPU_HOTPLUG_ONLINE 0
++#define XEN_SYSCTL_CPU_HOTPLUG_OFFLINE 1
++ uint32_t op; /* hotplug opcode */
++};
++typedef struct xen_sysctl_cpu_hotplug xen_sysctl_cpu_hotplug_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_cpu_hotplug_t);
++
++
++struct xen_sysctl {
++ uint32_t cmd;
++ uint32_t interface_version; /* XEN_SYSCTL_INTERFACE_VERSION */
++ union {
++ struct xen_sysctl_readconsole readconsole;
++ struct xen_sysctl_tbuf_op tbuf_op;
++ struct xen_sysctl_physinfo physinfo;
++ struct xen_sysctl_sched_id sched_id;
++ struct xen_sysctl_perfc_op perfc_op;
++ struct xen_sysctl_getdomaininfolist getdomaininfolist;
++ struct xen_sysctl_debug_keys debug_keys;
++ struct xen_sysctl_getcpuinfo getcpuinfo;
++ struct xen_sysctl_availheap availheap;
++ struct xen_sysctl_get_pmstat get_pmstat;
++ struct xen_sysctl_cpu_hotplug cpu_hotplug;
++ uint8_t pad[128];
++ } u;
++};
++typedef struct xen_sysctl xen_sysctl_t;
++DEFINE_XEN_GUEST_HANDLE(xen_sysctl_t);
++
++#endif /* __XEN_PUBLIC_SYSCTL_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/trace.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/trace.h 2008-11-25 12:22:34.000000000 +0100
+@@ -0,0 +1,205 @@
++/******************************************************************************
++ * include/public/trace.h
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Mark Williamson, (C) 2004 Intel Research Cambridge
++ * Copyright (C) 2005 Bin Ren
++ */
++
++#ifndef __XEN_PUBLIC_TRACE_H__
++#define __XEN_PUBLIC_TRACE_H__
++
++#define TRACE_EXTRA_MAX 7
++#define TRACE_EXTRA_SHIFT 28
++
++/* Trace classes */
++#define TRC_CLS_SHIFT 16
++#define TRC_GEN 0x0001f000 /* General trace */
++#define TRC_SCHED 0x0002f000 /* Xen Scheduler trace */
++#define TRC_DOM0OP 0x0004f000 /* Xen DOM0 operation trace */
++#define TRC_HVM 0x0008f000 /* Xen HVM trace */
++#define TRC_MEM 0x0010f000 /* Xen memory trace */
++#define TRC_PV 0x0020f000 /* Xen PV traces */
++#define TRC_SHADOW 0x0040f000 /* Xen shadow tracing */
++#define TRC_PM 0x0080f000 /* Xen power management trace */
++#define TRC_ALL 0x0ffff000
++#define TRC_HD_TO_EVENT(x) ((x)&0x0fffffff)
++#define TRC_HD_CYCLE_FLAG (1UL<<31)
++#define TRC_HD_INCLUDES_CYCLE_COUNT(x) ( !!( (x) & TRC_HD_CYCLE_FLAG ) )
++#define TRC_HD_EXTRA(x) (((x)>>TRACE_EXTRA_SHIFT)&TRACE_EXTRA_MAX)
++
++/* Trace subclasses */
++#define TRC_SUBCLS_SHIFT 12
++
++/* trace subclasses for SVM */
++#define TRC_HVM_ENTRYEXIT 0x00081000 /* VMENTRY and #VMEXIT */
++#define TRC_HVM_HANDLER 0x00082000 /* various HVM handlers */
++
++#define TRC_SCHED_MIN 0x00021000 /* Just runstate changes */
++#define TRC_SCHED_VERBOSE 0x00028000 /* More inclusive scheduling */
++
++/* Trace events per class */
++#define TRC_LOST_RECORDS (TRC_GEN + 1)
++#define TRC_TRACE_WRAP_BUFFER (TRC_GEN + 2)
++#define TRC_TRACE_CPU_CHANGE (TRC_GEN + 3)
++
++#define TRC_SCHED_RUNSTATE_CHANGE (TRC_SCHED_MIN + 1)
++#define TRC_SCHED_DOM_ADD (TRC_SCHED_VERBOSE + 1)
++#define TRC_SCHED_DOM_REM (TRC_SCHED_VERBOSE + 2)
++#define TRC_SCHED_SLEEP (TRC_SCHED_VERBOSE + 3)
++#define TRC_SCHED_WAKE (TRC_SCHED_VERBOSE + 4)
++#define TRC_SCHED_YIELD (TRC_SCHED_VERBOSE + 5)
++#define TRC_SCHED_BLOCK (TRC_SCHED_VERBOSE + 6)
++#define TRC_SCHED_SHUTDOWN (TRC_SCHED_VERBOSE + 7)
++#define TRC_SCHED_CTL (TRC_SCHED_VERBOSE + 8)
++#define TRC_SCHED_ADJDOM (TRC_SCHED_VERBOSE + 9)
++#define TRC_SCHED_SWITCH (TRC_SCHED_VERBOSE + 10)
++#define TRC_SCHED_S_TIMER_FN (TRC_SCHED_VERBOSE + 11)
++#define TRC_SCHED_T_TIMER_FN (TRC_SCHED_VERBOSE + 12)
++#define TRC_SCHED_DOM_TIMER_FN (TRC_SCHED_VERBOSE + 13)
++#define TRC_SCHED_SWITCH_INFPREV (TRC_SCHED_VERBOSE + 14)
++#define TRC_SCHED_SWITCH_INFNEXT (TRC_SCHED_VERBOSE + 15)
++
++#define TRC_MEM_PAGE_GRANT_MAP (TRC_MEM + 1)
++#define TRC_MEM_PAGE_GRANT_UNMAP (TRC_MEM + 2)
++#define TRC_MEM_PAGE_GRANT_TRANSFER (TRC_MEM + 3)
++
++#define TRC_PV_HYPERCALL (TRC_PV + 1)
++#define TRC_PV_TRAP (TRC_PV + 3)
++#define TRC_PV_PAGE_FAULT (TRC_PV + 4)
++#define TRC_PV_FORCED_INVALID_OP (TRC_PV + 5)
++#define TRC_PV_EMULATE_PRIVOP (TRC_PV + 6)
++#define TRC_PV_EMULATE_4GB (TRC_PV + 7)
++#define TRC_PV_MATH_STATE_RESTORE (TRC_PV + 8)
++#define TRC_PV_PAGING_FIXUP (TRC_PV + 9)
++#define TRC_PV_GDT_LDT_MAPPING_FAULT (TRC_PV + 10)
++#define TRC_PV_PTWR_EMULATION (TRC_PV + 11)
++#define TRC_PV_PTWR_EMULATION_PAE (TRC_PV + 12)
++ /* Indicates that addresses in trace record are 64 bits */
++#define TRC_64_FLAG (0x100)
++
++#define TRC_SHADOW_NOT_SHADOW (TRC_SHADOW + 1)
++#define TRC_SHADOW_FAST_PROPAGATE (TRC_SHADOW + 2)
++#define TRC_SHADOW_FAST_MMIO (TRC_SHADOW + 3)
++#define TRC_SHADOW_FALSE_FAST_PATH (TRC_SHADOW + 4)
++#define TRC_SHADOW_MMIO (TRC_SHADOW + 5)
++#define TRC_SHADOW_FIXUP (TRC_SHADOW + 6)
++#define TRC_SHADOW_DOMF_DYING (TRC_SHADOW + 7)
++#define TRC_SHADOW_EMULATE (TRC_SHADOW + 8)
++#define TRC_SHADOW_EMULATE_UNSHADOW_USER (TRC_SHADOW + 9)
++#define TRC_SHADOW_EMULATE_UNSHADOW_EVTINJ (TRC_SHADOW + 10)
++#define TRC_SHADOW_EMULATE_UNSHADOW_UNHANDLED (TRC_SHADOW + 11)
++#define TRC_SHADOW_WRMAP_BF (TRC_SHADOW + 12)
++#define TRC_SHADOW_PREALLOC_UNPIN (TRC_SHADOW + 13)
++#define TRC_SHADOW_RESYNC_FULL (TRC_SHADOW + 14)
++#define TRC_SHADOW_RESYNC_ONLY (TRC_SHADOW + 15)
++
++/* trace events per subclass */
++#define TRC_HVM_VMENTRY (TRC_HVM_ENTRYEXIT + 0x01)
++#define TRC_HVM_VMEXIT (TRC_HVM_ENTRYEXIT + 0x02)
++#define TRC_HVM_VMEXIT64 (TRC_HVM_ENTRYEXIT + TRC_64_FLAG + 0x02)
++#define TRC_HVM_PF_XEN (TRC_HVM_HANDLER + 0x01)
++#define TRC_HVM_PF_XEN64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x01)
++#define TRC_HVM_PF_INJECT (TRC_HVM_HANDLER + 0x02)
++#define TRC_HVM_PF_INJECT64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x02)
++#define TRC_HVM_INJ_EXC (TRC_HVM_HANDLER + 0x03)
++#define TRC_HVM_INJ_VIRQ (TRC_HVM_HANDLER + 0x04)
++#define TRC_HVM_REINJ_VIRQ (TRC_HVM_HANDLER + 0x05)
++#define TRC_HVM_IO_READ (TRC_HVM_HANDLER + 0x06)
++#define TRC_HVM_IO_WRITE (TRC_HVM_HANDLER + 0x07)
++#define TRC_HVM_CR_READ (TRC_HVM_HANDLER + 0x08)
++#define TRC_HVM_CR_READ64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x08)
++#define TRC_HVM_CR_WRITE (TRC_HVM_HANDLER + 0x09)
++#define TRC_HVM_CR_WRITE64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x09)
++#define TRC_HVM_DR_READ (TRC_HVM_HANDLER + 0x0A)
++#define TRC_HVM_DR_WRITE (TRC_HVM_HANDLER + 0x0B)
++#define TRC_HVM_MSR_READ (TRC_HVM_HANDLER + 0x0C)
++#define TRC_HVM_MSR_WRITE (TRC_HVM_HANDLER + 0x0D)
++#define TRC_HVM_CPUID (TRC_HVM_HANDLER + 0x0E)
++#define TRC_HVM_INTR (TRC_HVM_HANDLER + 0x0F)
++#define TRC_HVM_NMI (TRC_HVM_HANDLER + 0x10)
++#define TRC_HVM_SMI (TRC_HVM_HANDLER + 0x11)
++#define TRC_HVM_VMMCALL (TRC_HVM_HANDLER + 0x12)
++#define TRC_HVM_HLT (TRC_HVM_HANDLER + 0x13)
++#define TRC_HVM_INVLPG (TRC_HVM_HANDLER + 0x14)
++#define TRC_HVM_INVLPG64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x14)
++#define TRC_HVM_MCE (TRC_HVM_HANDLER + 0x15)
++#define TRC_HVM_IO_ASSIST (TRC_HVM_HANDLER + 0x16)
++#define TRC_HVM_IO_ASSIST64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x16)
++#define TRC_HVM_MMIO_ASSIST (TRC_HVM_HANDLER + 0x17)
++#define TRC_HVM_MMIO_ASSIST64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x17)
++#define TRC_HVM_CLTS (TRC_HVM_HANDLER + 0x18)
++#define TRC_HVM_LMSW (TRC_HVM_HANDLER + 0x19)
++#define TRC_HVM_LMSW64 (TRC_HVM_HANDLER + TRC_64_FLAG + 0x19)
++
++/* trace subclasses for power management */
++#define TRC_PM_FREQ 0x00801000 /* xen cpu freq events */
++#define TRC_PM_IDLE 0x00802000 /* xen cpu idle events */
++
++/* trace events for per class */
++#define TRC_PM_FREQ_CHANGE (TRC_PM_FREQ + 0x01)
++#define TRC_PM_IDLE_ENTRY (TRC_PM_IDLE + 0x01)
++#define TRC_PM_IDLE_EXIT (TRC_PM_IDLE + 0x02)
++
++/* This structure represents a single trace buffer record. */
++struct t_rec {
++ uint32_t event:28;
++ uint32_t extra_u32:3; /* # entries in trailing extra_u32[] array */
++ uint32_t cycles_included:1; /* u.cycles or u.no_cycles? */
++ union {
++ struct {
++ uint32_t cycles_lo, cycles_hi; /* cycle counter timestamp */
++ uint32_t extra_u32[7]; /* event data items */
++ } cycles;
++ struct {
++ uint32_t extra_u32[7]; /* event data items */
++ } nocycles;
++ } u;
++};
++
++/*
++ * This structure contains the metadata for a single trace buffer. The head
++ * field, indexes into an array of struct t_rec's.
++ */
++struct t_buf {
++ /* Assume the data buffer size is X. X is generally not a power of 2.
++ * CONS and PROD are incremented modulo (2*X):
++ * 0 <= cons < 2*X
++ * 0 <= prod < 2*X
++ * This is done because addition modulo X breaks at 2^32 when X is not a
++ * power of 2:
++ * (((2^32 - 1) % X) + 1) % X != (2^32) % X
++ */
++ uint32_t cons; /* Offset of next item to be consumed by control tools. */
++ uint32_t prod; /* Offset of next item to be produced by Xen. */
++ /* Records follow immediately after the meta-data header. */
++};
++
++#endif /* __XEN_PUBLIC_TRACE_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/xen-compat.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/xen-compat.h 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,44 @@
++/******************************************************************************
++ * xen-compat.h
++ *
++ * Guest OS interface to Xen. Compatibility layer.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (c) 2006, Christian Limpach
++ */
++
++#ifndef __XEN_PUBLIC_XEN_COMPAT_H__
++#define __XEN_PUBLIC_XEN_COMPAT_H__
++
++#define __XEN_LATEST_INTERFACE_VERSION__ 0x00030209
++
++#if defined(__XEN__) || defined(__XEN_TOOLS__)
++/* Xen is built with matching headers and implements the latest interface. */
++#define __XEN_INTERFACE_VERSION__ __XEN_LATEST_INTERFACE_VERSION__
++#elif !defined(__XEN_INTERFACE_VERSION__)
++/* Guests which do not specify a version get the legacy interface. */
++#define __XEN_INTERFACE_VERSION__ 0x00000000
++#endif
++
++#if __XEN_INTERFACE_VERSION__ > __XEN_LATEST_INTERFACE_VERSION__
++#error "These header files do not support the requested interface version."
++#endif
++
++#endif /* __XEN_PUBLIC_XEN_COMPAT_H__ */
+Index: head-2008-11-25/include/xen/interface/xenoprof.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/xenoprof.h 2007-06-12 13:14:19.000000000 +0200
+@@ -0,0 +1,138 @@
++/******************************************************************************
++ * xenoprof.h
++ *
++ * Interface for enabling system wide profiling based on hardware performance
++ * counters
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Copyright (C) 2005 Hewlett-Packard Co.
++ * Written by Aravind Menon & Jose Renato Santos
++ */
++
++#ifndef __XEN_PUBLIC_XENOPROF_H__
++#define __XEN_PUBLIC_XENOPROF_H__
++
++#include "xen.h"
++
++/*
++ * Commands to HYPERVISOR_xenoprof_op().
++ */
++#define XENOPROF_init 0
++#define XENOPROF_reset_active_list 1
++#define XENOPROF_reset_passive_list 2
++#define XENOPROF_set_active 3
++#define XENOPROF_set_passive 4
++#define XENOPROF_reserve_counters 5
++#define XENOPROF_counter 6
++#define XENOPROF_setup_events 7
++#define XENOPROF_enable_virq 8
++#define XENOPROF_start 9
++#define XENOPROF_stop 10
++#define XENOPROF_disable_virq 11
++#define XENOPROF_release_counters 12
++#define XENOPROF_shutdown 13
++#define XENOPROF_get_buffer 14
++#define XENOPROF_set_backtrace 15
++#define XENOPROF_last_op 15
++
++#define MAX_OPROF_EVENTS 32
++#define MAX_OPROF_DOMAINS 25
++#define XENOPROF_CPU_TYPE_SIZE 64
++
++/* Xenoprof performance events (not Xen events) */
++struct event_log {
++ uint64_t eip;
++ uint8_t mode;
++ uint8_t event;
++};
++
++/* PC value that indicates a special code */
++#define XENOPROF_ESCAPE_CODE ~0UL
++/* Transient events for the xenoprof->oprofile cpu buf */
++#define XENOPROF_TRACE_BEGIN 1
++
++/* Xenoprof buffer shared between Xen and domain - 1 per VCPU */
++struct xenoprof_buf {
++ uint32_t event_head;
++ uint32_t event_tail;
++ uint32_t event_size;
++ uint32_t vcpu_id;
++ uint64_t xen_samples;
++ uint64_t kernel_samples;
++ uint64_t user_samples;
++ uint64_t lost_samples;
++ struct event_log event_log[1];
++};
++#ifndef __XEN__
++typedef struct xenoprof_buf xenoprof_buf_t;
++DEFINE_XEN_GUEST_HANDLE(xenoprof_buf_t);
++#endif
++
++struct xenoprof_init {
++ int32_t num_events;
++ int32_t is_primary;
++ char cpu_type[XENOPROF_CPU_TYPE_SIZE];
++};
++typedef struct xenoprof_init xenoprof_init_t;
++DEFINE_XEN_GUEST_HANDLE(xenoprof_init_t);
++
++struct xenoprof_get_buffer {
++ int32_t max_samples;
++ int32_t nbuf;
++ int32_t bufsize;
++ uint64_t buf_gmaddr;
++};
++typedef struct xenoprof_get_buffer xenoprof_get_buffer_t;
++DEFINE_XEN_GUEST_HANDLE(xenoprof_get_buffer_t);
++
++struct xenoprof_counter {
++ uint32_t ind;
++ uint64_t count;
++ uint32_t enabled;
++ uint32_t event;
++ uint32_t hypervisor;
++ uint32_t kernel;
++ uint32_t user;
++ uint64_t unit_mask;
++};
++typedef struct xenoprof_counter xenoprof_counter_t;
++DEFINE_XEN_GUEST_HANDLE(xenoprof_counter_t);
++
++typedef struct xenoprof_passive {
++ uint16_t domain_id;
++ int32_t max_samples;
++ int32_t nbuf;
++ int32_t bufsize;
++ uint64_t buf_gmaddr;
++} xenoprof_passive_t;
++DEFINE_XEN_GUEST_HANDLE(xenoprof_passive_t);
++
++
++#endif /* __XEN_PUBLIC_XENOPROF_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/xsm/acm.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/xsm/acm.h 2008-07-21 11:00:33.000000000 +0200
+@@ -0,0 +1,235 @@
++/*
++ * acm.h: Xen access control module interface defintions
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Reiner Sailer <sailer@watson.ibm.com>
++ * Copyright (c) 2005, International Business Machines Corporation.
++ */
++
++#ifndef _XEN_PUBLIC_ACM_H
++#define _XEN_PUBLIC_ACM_H
++
++#include "../xen.h"
++
++/* if ACM_DEBUG defined, all hooks should
++ * print a short trace message (comment it out
++ * when not in testing mode )
++ */
++/* #define ACM_DEBUG */
++
++#ifdef ACM_DEBUG
++# define printkd(fmt, args...) printk(fmt,## args)
++#else
++# define printkd(fmt, args...)
++#endif
++
++/* default ssid reference value if not supplied */
++#define ACM_DEFAULT_SSID 0x0
++#define ACM_DEFAULT_LOCAL_SSID 0x0
++
++/* Internal ACM ERROR types */
++#define ACM_OK 0
++#define ACM_UNDEF -1
++#define ACM_INIT_SSID_ERROR -2
++#define ACM_INIT_SOID_ERROR -3
++#define ACM_ERROR -4
++
++/* External ACCESS DECISIONS */
++#define ACM_ACCESS_PERMITTED 0
++#define ACM_ACCESS_DENIED -111
++#define ACM_NULL_POINTER_ERROR -200
++
++/*
++ Error codes reported in when trying to test for a new policy
++ These error codes are reported in an array of tuples where
++ each error code is followed by a parameter describing the error
++ more closely, such as a domain id.
++*/
++#define ACM_EVTCHN_SHARING_VIOLATION 0x100
++#define ACM_GNTTAB_SHARING_VIOLATION 0x101
++#define ACM_DOMAIN_LOOKUP 0x102
++#define ACM_CHWALL_CONFLICT 0x103
++#define ACM_SSIDREF_IN_USE 0x104
++
++
++/* primary policy in lower 4 bits */
++#define ACM_NULL_POLICY 0
++#define ACM_CHINESE_WALL_POLICY 1
++#define ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY 2
++#define ACM_POLICY_UNDEFINED 15
++
++/* combinations have secondary policy component in higher 4bit */
++#define ACM_CHINESE_WALL_AND_SIMPLE_TYPE_ENFORCEMENT_POLICY \
++ ((ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY << 4) | ACM_CHINESE_WALL_POLICY)
++
++/* policy: */
++#define ACM_POLICY_NAME(X) \
++ ((X) == (ACM_NULL_POLICY)) ? "NULL" : \
++ ((X) == (ACM_CHINESE_WALL_POLICY)) ? "CHINESE WALL" : \
++ ((X) == (ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY)) ? "SIMPLE TYPE ENFORCEMENT" : \
++ ((X) == (ACM_CHINESE_WALL_AND_SIMPLE_TYPE_ENFORCEMENT_POLICY)) ? "CHINESE WALL AND SIMPLE TYPE ENFORCEMENT" : \
++ "UNDEFINED"
++
++/* the following policy versions must be increased
++ * whenever the interpretation of the related
++ * policy's data structure changes
++ */
++#define ACM_POLICY_VERSION 4
++#define ACM_CHWALL_VERSION 1
++#define ACM_STE_VERSION 1
++
++/* defines a ssid reference used by xen */
++typedef uint32_t ssidref_t;
++
++/* hooks that are known to domains */
++#define ACMHOOK_none 0
++#define ACMHOOK_sharing 1
++#define ACMHOOK_authorization 2
++#define ACMHOOK_conflictset 3
++
++/* -------security policy relevant type definitions-------- */
++
++/* type identifier; compares to "equal" or "not equal" */
++typedef uint16_t domaintype_t;
++
++/* CHINESE WALL POLICY DATA STRUCTURES
++ *
++ * current accumulated conflict type set:
++ * When a domain is started and has a type that is in
++ * a conflict set, the conflicting types are incremented in
++ * the aggregate set. When a domain is destroyed, the
++ * conflicting types to its type are decremented.
++ * If a domain has multiple types, this procedure works over
++ * all those types.
++ *
++ * conflict_aggregate_set[i] holds the number of
++ * running domains that have a conflict with type i.
++ *
++ * running_types[i] holds the number of running domains
++ * that include type i in their ssidref-referenced type set
++ *
++ * conflict_sets[i][j] is "0" if type j has no conflict
++ * with type i and is "1" otherwise.
++ */
++/* high-16 = version, low-16 = check magic */
++#define ACM_MAGIC 0x0001debc
++
++/* size of the SHA1 hash identifying the XML policy from which the
++ binary policy was created */
++#define ACM_SHA1_HASH_SIZE 20
++
++/* each offset in bytes from start of the struct they
++ * are part of */
++
++/* V3 of the policy buffer aded a version structure */
++struct acm_policy_version
++{
++ uint32_t major;
++ uint32_t minor;
++};
++
++
++/* each buffer consists of all policy information for
++ * the respective policy given in the policy code
++ *
++ * acm_policy_buffer, acm_chwall_policy_buffer,
++ * and acm_ste_policy_buffer need to stay 32-bit aligned
++ * because we create binary policies also with external
++ * tools that assume packed representations (e.g. the java tool)
++ */
++struct acm_policy_buffer {
++ uint32_t magic;
++ uint32_t policy_version; /* ACM_POLICY_VERSION */
++ uint32_t len;
++ uint32_t policy_reference_offset;
++ uint32_t primary_policy_code;
++ uint32_t primary_buffer_offset;
++ uint32_t secondary_policy_code;
++ uint32_t secondary_buffer_offset;
++ struct acm_policy_version xml_pol_version; /* add in V3 */
++ uint8_t xml_policy_hash[ACM_SHA1_HASH_SIZE]; /* added in V4 */
++};
++
++
++struct acm_policy_reference_buffer {
++ uint32_t len;
++};
++
++struct acm_chwall_policy_buffer {
++ uint32_t policy_version; /* ACM_CHWALL_VERSION */
++ uint32_t policy_code;
++ uint32_t chwall_max_types;
++ uint32_t chwall_max_ssidrefs;
++ uint32_t chwall_max_conflictsets;
++ uint32_t chwall_ssid_offset;
++ uint32_t chwall_conflict_sets_offset;
++ uint32_t chwall_running_types_offset;
++ uint32_t chwall_conflict_aggregate_offset;
++};
++
++struct acm_ste_policy_buffer {
++ uint32_t policy_version; /* ACM_STE_VERSION */
++ uint32_t policy_code;
++ uint32_t ste_max_types;
++ uint32_t ste_max_ssidrefs;
++ uint32_t ste_ssid_offset;
++};
++
++struct acm_stats_buffer {
++ uint32_t magic;
++ uint32_t len;
++ uint32_t primary_policy_code;
++ uint32_t primary_stats_offset;
++ uint32_t secondary_policy_code;
++ uint32_t secondary_stats_offset;
++};
++
++struct acm_ste_stats_buffer {
++ uint32_t ec_eval_count;
++ uint32_t gt_eval_count;
++ uint32_t ec_denied_count;
++ uint32_t gt_denied_count;
++ uint32_t ec_cachehit_count;
++ uint32_t gt_cachehit_count;
++};
++
++struct acm_ssid_buffer {
++ uint32_t len;
++ ssidref_t ssidref;
++ uint32_t policy_reference_offset;
++ uint32_t primary_policy_code;
++ uint32_t primary_max_types;
++ uint32_t primary_types_offset;
++ uint32_t secondary_policy_code;
++ uint32_t secondary_max_types;
++ uint32_t secondary_types_offset;
++};
++
++#endif
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/xsm/acm_ops.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/xsm/acm_ops.h 2007-10-22 13:39:15.000000000 +0200
+@@ -0,0 +1,159 @@
++/*
++ * acm_ops.h: Xen access control module hypervisor commands
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
++ * Reiner Sailer <sailer@watson.ibm.com>
++ * Copyright (c) 2005,2006 International Business Machines Corporation.
++ */
++
++#ifndef __XEN_PUBLIC_ACM_OPS_H__
++#define __XEN_PUBLIC_ACM_OPS_H__
++
++#include "../xen.h"
++#include "acm.h"
++
++/*
++ * Make sure you increment the interface version whenever you modify this file!
++ * This makes sure that old versions of acm tools will stop working in a
++ * well-defined way (rather than crashing the machine, for instance).
++ */
++#define ACM_INTERFACE_VERSION 0xAAAA000A
++
++/************************************************************************/
++
++/*
++ * Prototype for this hypercall is:
++ * int acm_op(int cmd, void *args)
++ * @cmd == ACMOP_??? (access control module operation).
++ * @args == Operation-specific extra arguments (NULL if none).
++ */
++
++
++#define ACMOP_setpolicy 1
++struct acm_setpolicy {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) pushcache;
++ uint32_t pushcache_size;
++};
++
++
++#define ACMOP_getpolicy 2
++struct acm_getpolicy {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) pullcache;
++ uint32_t pullcache_size;
++};
++
++
++#define ACMOP_dumpstats 3
++struct acm_dumpstats {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) pullcache;
++ uint32_t pullcache_size;
++};
++
++
++#define ACMOP_getssid 4
++#define ACM_GETBY_ssidref 1
++#define ACM_GETBY_domainid 2
++struct acm_getssid {
++ /* IN */
++ uint32_t get_ssid_by; /* ACM_GETBY_* */
++ union {
++ domaintype_t domainid;
++ ssidref_t ssidref;
++ } id;
++ XEN_GUEST_HANDLE_64(void) ssidbuf;
++ uint32_t ssidbuf_size;
++};
++
++#define ACMOP_getdecision 5
++struct acm_getdecision {
++ /* IN */
++ uint32_t get_decision_by1; /* ACM_GETBY_* */
++ uint32_t get_decision_by2; /* ACM_GETBY_* */
++ union {
++ domaintype_t domainid;
++ ssidref_t ssidref;
++ } id1;
++ union {
++ domaintype_t domainid;
++ ssidref_t ssidref;
++ } id2;
++ uint32_t hook;
++ /* OUT */
++ uint32_t acm_decision;
++};
++
++
++#define ACMOP_chgpolicy 6
++struct acm_change_policy {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) policy_pushcache;
++ uint32_t policy_pushcache_size;
++ XEN_GUEST_HANDLE_64(void) del_array;
++ uint32_t delarray_size;
++ XEN_GUEST_HANDLE_64(void) chg_array;
++ uint32_t chgarray_size;
++ /* OUT */
++ /* array with error code */
++ XEN_GUEST_HANDLE_64(void) err_array;
++ uint32_t errarray_size;
++};
++
++#define ACMOP_relabeldoms 7
++struct acm_relabel_doms {
++ /* IN */
++ XEN_GUEST_HANDLE_64(void) relabel_map;
++ uint32_t relabel_map_size;
++ /* OUT */
++ XEN_GUEST_HANDLE_64(void) err_array;
++ uint32_t errarray_size;
++};
++
++/* future interface to Xen */
++struct xen_acmctl {
++ uint32_t cmd;
++ uint32_t interface_version;
++ union {
++ struct acm_setpolicy setpolicy;
++ struct acm_getpolicy getpolicy;
++ struct acm_dumpstats dumpstats;
++ struct acm_getssid getssid;
++ struct acm_getdecision getdecision;
++ struct acm_change_policy change_policy;
++ struct acm_relabel_doms relabel_doms;
++ } u;
++};
++
++typedef struct xen_acmctl xen_acmctl_t;
++DEFINE_XEN_GUEST_HANDLE(xen_acmctl_t);
++
++#endif /* __XEN_PUBLIC_ACM_OPS_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/xsm/flask_op.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-11-25/include/xen/interface/xsm/flask_op.h 2008-09-01 12:07:31.000000000 +0200
+@@ -0,0 +1,45 @@
++/*
++ * This file contains the flask_op hypercall commands and definitions.
++ *
++ * Author: George Coker, <gscoker@alpha.ncsc.mil>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2,
++ * as published by the Free Software Foundation.
++ */
++
++#ifndef __FLASK_OP_H__
++#define __FLASK_OP_H__
++
++#define FLASK_LOAD 1
++#define FLASK_GETENFORCE 2
++#define FLASK_SETENFORCE 3
++#define FLASK_CONTEXT_TO_SID 4
++#define FLASK_SID_TO_CONTEXT 5
++#define FLASK_ACCESS 6
++#define FLASK_CREATE 7
++#define FLASK_RELABEL 8
++#define FLASK_USER 9
++#define FLASK_POLICYVERS 10
++#define FLASK_GETBOOL 11
++#define FLASK_SETBOOL 12
++#define FLASK_COMMITBOOLS 13
++#define FLASK_MLS 14
++#define FLASK_DISABLE 15
++#define FLASK_GETAVC_THRESHOLD 16
++#define FLASK_SETAVC_THRESHOLD 17
++#define FLASK_AVC_HASHSTATS 18
++#define FLASK_AVC_CACHESTATS 19
++#define FLASK_MEMBER 20
++
++#define FLASK_LAST FLASK_MEMBER
++
++typedef struct flask_op {
++ uint32_t cmd;
++ uint32_t size;
++ char *buf;
++} flask_op_t;
++
++DEFINE_XEN_GUEST_HANDLE(flask_op_t);
++
++#endif
--- /dev/null
+Subject: xen3 xen-kconfig
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-11-25/arch/x86/Kconfig
+===================================================================
+--- head-2008-11-25.orig/arch/x86/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/Kconfig 2008-11-17 13:39:31.000000000 +0100
+@@ -44,6 +44,7 @@ config GENERIC_LOCKBREAK
+
+ config GENERIC_TIME
+ def_bool y
++ depends on !X86_XEN
+
+ config GENERIC_CMOS_UPDATE
+ def_bool y
+@@ -188,7 +189,7 @@ config X86_64_SMP
+
+ config X86_HT
+ bool
+- depends on SMP
++ depends on SMP && !XEN
+ depends on (X86_32 && !X86_VOYAGER) || X86_64
+ default y
+
+@@ -200,6 +201,17 @@ config X86_BIOS_REBOOT
+ config X86_TRAMPOLINE
+ bool
+ depends on X86_SMP || (X86_VOYAGER && SMP) || (64BIT && ACPI_SLEEP)
++ depends on !XEN
++ default y
++
++config X86_NO_TSS
++ bool
++ depends on X86_XEN || X86_64_XEN
++ default y
++
++config X86_NO_IDT
++ bool
++ depends on X86_XEN || X86_64_XEN
+ default y
+
+ config KTIME_SCALAR
+@@ -267,6 +279,17 @@ config X86_PC
+ help
+ Choose this option if your computer is a standard PC or compatible.
+
++config X86_XEN
++ bool "Xen-compatible"
++ select XEN
++ select X86_PAE
++ select X86_UP_APIC if !SMP && XEN_PRIVILEGED_GUEST
++ select X86_UP_IOAPIC if !SMP && XEN_PRIVILEGED_GUEST
++ select SWIOTLB
++ help
++ Choose this option if you plan to run this kernel on top of the
++ Xen Hypervisor.
++
+ config X86_ELAN
+ bool "AMD Elan"
+ depends on X86_32
+@@ -334,6 +357,13 @@ config X86_BIGSMP
+
+ endif
+
++config X86_64_XEN
++ bool "Enable Xen compatible kernel"
++ select XEN
++ select SWIOTLB
++ help
++ This option will compile a kernel compatible with Xen hypervisor
++
+ config X86_VSMP
+ bool "Support for ScaleMP vSMP"
+ select PARAVIRT
+@@ -474,6 +504,7 @@ source "arch/x86/Kconfig.cpu"
+ config HPET_TIMER
+ def_bool X86_64
+ prompt "HPET Timer Support" if X86_32
++ depends on !X86_XEN && !X86_64_XEN
+ help
+ Use the IA-PC HPET (High Precision Event Timer) to manage
+ time in preference to the PIT and RTC, if a HPET is
+@@ -510,7 +541,7 @@ config GART_IOMMU
+ default y
+ select SWIOTLB
+ select AGP
+- depends on X86_64 && PCI
++ depends on X86_64 && PCI && !X86_64_XEN
+ help
+ Support for full DMA access of devices with 32bit memory access only
+ on systems with more than 3GB. This is usually needed for USB,
+@@ -525,7 +556,7 @@ config GART_IOMMU
+ config CALGARY_IOMMU
+ bool "IBM Calgary IOMMU support"
+ select SWIOTLB
+- depends on X86_64 && PCI && EXPERIMENTAL
++ depends on X86_64 && PCI && !X86_64_XEN && EXPERIMENTAL
+ help
+ Support for hardware IOMMUs in IBM's xSeries x366 and x460
+ systems. Needed to run systems with more than 3GB of memory
+@@ -593,6 +624,7 @@ config NR_CPUS
+ depends on SMP
+ default "4096" if MAXSMP
+ default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
++ default "16" if X86_64_XEN
+ default "8"
+ help
+ This allows you to specify the maximum number of CPUs which this
+@@ -648,7 +680,7 @@ config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
+
+ config X86_UP_APIC
+ bool "Local APIC support on uniprocessors"
+- depends on X86_32 && !SMP && !(X86_VOYAGER || X86_GENERICARCH)
++ depends on X86_32 && !SMP && !(X86_VOYAGER || X86_GENERICARCH || XEN_UNPRIVILEGED_GUEST)
+ help
+ A local APIC (Advanced Programmable Interrupt Controller) is an
+ integrated interrupt controller in the CPU. If you have a single-CPU
+@@ -674,18 +706,25 @@ config X86_UP_IOAPIC
+ config X86_LOCAL_APIC
+ def_bool y
+ depends on X86_64 || (X86_32 && (X86_UP_APIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
++ depends on !XEN_UNPRIVILEGED_GUEST
+
+ config X86_IO_APIC
+ def_bool y
+ depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
++ depends on !XEN_UNPRIVILEGED_GUEST
+
+ config X86_VISWS_APIC
+ def_bool y
+ depends on X86_32 && X86_VISWS
+
++config X86_XEN_GENAPIC
++ bool
++ depends on X86_64_XEN
++ default y
++
+ config X86_MCE
+ bool "Machine Check Exception"
+- depends on !X86_VOYAGER
++ depends on !(X86_VOYAGER || XEN)
+ ---help---
+ Machine Check Exception support allows the processor to notify the
+ kernel if it detects a problem (e.g. overheating, component failure).
+@@ -785,7 +824,7 @@ config I8K
+ config X86_REBOOTFIXUPS
+ def_bool n
+ prompt "Enable X86 board specific fixups for reboot"
+- depends on X86_32 && X86
++ depends on X86_32 && !X86_XEN
+ ---help---
+ This enables chipset and/or board specific fixups to be done
+ in order to get reboot to work correctly. This is only needed on
+@@ -802,6 +841,7 @@ config X86_REBOOTFIXUPS
+
+ config MICROCODE
+ tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
++ depends on !XEN_UNPRIVILEGED_GUEST
+ select FW_LOADER
+ ---help---
+ If you say Y here, you will be able to update the microcode on
+@@ -969,7 +1009,7 @@ config DIRECT_GBPAGES
+ # Common NUMA Features
+ config NUMA
+ bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"
+- depends on SMP
++ depends on SMP && !XEN
+ depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
+ default n if X86_PC
+ default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
+@@ -1071,7 +1111,7 @@ config ARCH_SPARSEMEM_DEFAULT
+
+ config ARCH_SPARSEMEM_ENABLE
+ def_bool y
+- depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC)
++ depends on (X86_64 && !X86_64_XEN) || NUMA || (EXPERIMENTAL && X86_PC)
+ select SPARSEMEM_STATIC if X86_32
+ select SPARSEMEM_VMEMMAP_ENABLE if X86_64
+
+@@ -1117,6 +1157,7 @@ config X86_RESERVE_LOW_64K
+ config MATH_EMULATION
+ bool
+ prompt "Math emulation" if X86_32
++ depends on !X86_XEN
+ ---help---
+ Linux can emulate a math coprocessor (used for floating point
+ operations) if you don't have one. 486DX and Pentium processors have
+@@ -1142,6 +1183,7 @@ config MATH_EMULATION
+
+ config MTRR
+ bool "MTRR (Memory Type Range Register) support"
++ depends on !XEN_UNPRIVILEGED_GUEST
+ ---help---
+ On Intel P6 family processors (Pentium Pro, Pentium II and later)
+ the Memory Type Range Registers (MTRRs) may be used to control
+@@ -1223,7 +1265,7 @@ config X86_PAT
+ config EFI
+ def_bool n
+ prompt "EFI runtime service support"
+- depends on ACPI
++ depends on ACPI && !X86_XEN && !X86_64_XEN
+ ---help---
+ This enables the kernel to use EFI runtime services that are
+ available (such as the EFI variable services).
+@@ -1238,7 +1280,7 @@ config EFI
+ config IRQBALANCE
+ def_bool y
+ prompt "Enable kernel irq balancing"
+- depends on X86_32 && SMP && X86_IO_APIC
++ depends on X86_32 && SMP && X86_IO_APIC && !X86_XEN
+ help
+ The default yes will allow the kernel to do irq load balancing.
+ Saying no will keep the kernel from doing irq load balancing.
+@@ -1301,6 +1343,7 @@ source kernel/Kconfig.hz
+ config KEXEC
+ bool "kexec system call"
+ depends on X86_BIOS_REBOOT
++ depends on !XEN_UNPRIVILEGED_GUEST
+ help
+ kexec is a system call that implements the ability to shutdown your
+ current kernel, and to start another kernel. It is like a reboot
+@@ -1318,6 +1361,7 @@ config KEXEC
+ config CRASH_DUMP
+ bool "kernel crash dumps"
+ depends on X86_64 || (X86_32 && HIGHMEM)
++ depends on !XEN
+ help
+ Generate crash dump after being started by kexec.
+ This should be normally only set in special crash dump kernels
+@@ -1436,6 +1480,7 @@ config COMPAT_VDSO
+ def_bool y
+ prompt "Compat VDSO support"
+ depends on X86_32 || IA32_EMULATION
++ depends on !X86_XEN
+ help
+ Map the 32-bit VDSO to the predictable old-style address too.
+ ---help---
+@@ -1458,7 +1503,7 @@ config HAVE_ARCH_EARLY_PFN_TO_NID
+ depends on NUMA
+
+ menu "Power management options"
+- depends on !X86_VOYAGER
++ depends on !(X86_VOYAGER || XEN_UNPRIVILEGED_GUEST)
+
+ config ARCH_HIBERNATION_HEADER
+ def_bool y
+@@ -1475,7 +1520,7 @@ config X86_APM_BOOT
+
+ menuconfig APM
+ tristate "APM (Advanced Power Management) BIOS support"
+- depends on X86_32 && PM_SLEEP
++ depends on X86_32 && PM_SLEEP && !XEN
+ ---help---
+ APM is a BIOS specification for saving power using several different
+ techniques. This is mostly useful for battery powered laptops with
+@@ -1641,6 +1686,7 @@ choice
+
+ config PCI_GOBIOS
+ bool "BIOS"
++ depends on !X86_XEN
+
+ config PCI_GOMMCONFIG
+ bool "MMConfig"
+@@ -1652,6 +1698,13 @@ config PCI_GOOLPC
+ bool "OLPC"
+ depends on OLPC
+
++config PCI_GOXEN_FE
++ bool "Xen PCI Frontend"
++ depends on X86_XEN
++ help
++ The PCI device frontend driver allows the kernel to import arbitrary
++ PCI devices from a PCI backend to support PCI driver domains.
++
+ config PCI_GOANY
+ bool "Any"
+
+@@ -1659,7 +1712,7 @@ endchoice
+
+ config PCI_BIOS
+ def_bool y
+- depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
++ depends on X86_32 && PCI && !XEN && (PCI_GOBIOS || PCI_GOANY)
+
+ # x86-64 doesn't support PCI BIOS access from long mode so always go direct.
+ config PCI_DIRECT
+@@ -1682,6 +1735,22 @@ config PCI_MMCONFIG
+ bool "Support mmconfig PCI config space access"
+ depends on X86_64 && PCI && ACPI
+
++config XEN_PCIDEV_FRONTEND
++ bool "Xen PCI Frontend" if X86_64
++ depends on PCI && ((X86_XEN && (PCI_GOXEN_FE || PCI_GOANY)) || X86_64_XEN)
++ select HOTPLUG
++ default y
++ help
++ The PCI device frontend driver allows the kernel to import arbitrary
++ PCI devices from a PCI backend to support PCI driver domains.
++
++config XEN_PCIDEV_FE_DEBUG
++ bool "Xen PCI Frontend Debugging"
++ depends on XEN_PCIDEV_FRONTEND
++ default n
++ help
++ Enables some debug statements within the PCI Frontend.
++
+ config DMAR
+ bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
+ depends on X86_64 && PCI_MSI && ACPI && EXPERIMENTAL
+@@ -1732,7 +1801,7 @@ if X86_32
+
+ config ISA
+ bool "ISA support"
+- depends on !X86_VOYAGER
++ depends on !X86_VOYAGER && !XEN
+ help
+ Find out whether you have ISA slots on your motherboard. ISA is the
+ name of a bus system, i.e. the way the CPU talks to the other stuff
+@@ -1759,7 +1828,7 @@ config EISA
+ source "drivers/eisa/Kconfig"
+
+ config MCA
+- bool "MCA support" if !X86_VOYAGER
++ bool "MCA support" if !X86_VOYAGER && !XEN
+ default y if X86_VOYAGER
+ help
+ MicroChannel Architecture is found in some IBM PS/2 machines and
+@@ -1871,4 +1940,6 @@ source "crypto/Kconfig"
+
+ source "arch/x86/kvm/Kconfig"
+
++source "drivers/xen/Kconfig"
++
+ source "lib/Kconfig"
+Index: head-2008-11-25/arch/x86/Kconfig.cpu
+===================================================================
+--- head-2008-11-25.orig/arch/x86/Kconfig.cpu 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/Kconfig.cpu 2008-11-10 11:49:15.000000000 +0100
+@@ -340,7 +340,7 @@ config X86_PPRO_FENCE
+
+ config X86_F00F_BUG
+ def_bool y
+- depends on M586MMX || M586TSC || M586 || M486 || M386
++ depends on (M586MMX || M586TSC || M586 || M486 || M386) && !X86_NO_IDT
+
+ config X86_WP_WORKS_OK
+ def_bool y
+@@ -397,6 +397,7 @@ config X86_P6_NOP
+ config X86_TSC
+ def_bool y
+ depends on ((MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
++ depends on !XEN
+
+ config X86_CMPXCHG64
+ def_bool y
+Index: head-2008-11-25/arch/x86/Kconfig.debug
+===================================================================
+--- head-2008-11-25.orig/arch/x86/Kconfig.debug 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/Kconfig.debug 2008-11-10 11:49:15.000000000 +0100
+@@ -130,7 +130,7 @@ config 4KSTACKS
+ config DOUBLEFAULT
+ default y
+ bool "Enable doublefault exception handler" if EMBEDDED
+- depends on X86_32
++ depends on X86_32 && !X86_NO_TSS
+ help
+ This option allows trapping of rare doublefault exceptions that
+ would otherwise cause a system to silently reboot. Disabling this
+Index: head-2008-11-25/drivers/acpi/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/acpi/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/acpi/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -362,6 +362,7 @@ config ACPI_SYSTEM
+ config X86_PM_TIMER
+ bool "Power Management Timer Support" if EMBEDDED
+ depends on X86
++ depends on !XEN
+ default y
+ help
+ The Power Management Timer is available on all ACPI-capable,
+@@ -415,4 +416,13 @@ config ACPI_SBS
+ This driver adds support for the Smart Battery System, another
+ type of access to battery information, found on some laptops.
+
++config ACPI_PV_SLEEP
++ bool
++ depends on X86 && XEN && ACPI_SLEEP
++ default y
++
++config PROCESSOR_EXTERNAL_CONTROL
++ bool
++ depends on (X86 || IA64) && XEN
++ default y
+ endif # ACPI
+Index: head-2008-11-25/drivers/char/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/char/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/char/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -1037,7 +1037,7 @@ config MAX_RAW_DEVS
+ config HPET
+ bool "HPET - High Precision Event Timer" if (X86 || IA64)
+ default n
+- depends on ACPI
++ depends on ACPI && !XEN
+ help
+ If you say Y here, you will have a miscdevice named "/dev/hpet/". Each
+ open selects one of the timers supported by the HPET. The timers are
+Index: head-2008-11-25/drivers/char/tpm/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/char/tpm/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/char/tpm/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -57,4 +57,13 @@ config TCG_INFINEON
+ Further information on this driver and the supported hardware
+ can be found at http://www.prosec.rub.de/tpm
+
++config TCG_XEN
++ tristate "XEN TPM Interface"
++ depends on XEN
++ ---help---
++ If you want to make TPM support available to a Xen user domain,
++ say Yes and it will be accessible from within Linux.
++ To compile this driver as a module, choose M here; the module
++ will be called tpm_xenu.
++
+ endif # TCG_TPM
+Index: head-2008-11-25/drivers/cpufreq/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/cpufreq/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/cpufreq/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -1,5 +1,6 @@
+ config CPU_FREQ
+ bool "CPU Frequency scaling"
++ depends on !PROCESSOR_EXTERNAL_CONTROL
+ help
+ CPU Frequency scaling allows you to change the clock speed of
+ CPUs on the fly. This is a nice method to save power, because
+Index: head-2008-11-25/drivers/pci/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/pci/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/pci/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -21,6 +21,9 @@ config PCI_MSI
+
+ If you don't know what to do here, say N.
+
++config PCI_REASSIGN
++ bool
++
+ config PCI_LEGACY
+ bool "Enable deprecated pci_find_* API"
+ depends on PCI
+Index: head-2008-11-25/drivers/serial/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/serial/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/serial/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -10,6 +10,7 @@ menu "Serial drivers"
+ config SERIAL_8250
+ tristate "8250/16550 and compatible serial support"
+ depends on (BROKEN || !SPARC)
++ depends on !XEN_DISABLE_SERIAL
+ select SERIAL_CORE
+ ---help---
+ This selects whether you want to include the driver for the standard
+Index: head-2008-11-25/drivers/video/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/video/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/video/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -1601,7 +1601,7 @@ config FB_CYBLA
+ tristate "Cyberblade/i1 support"
+ depends on FB && PCI && X86_32 && !64BIT
+ select FB_CFB_IMAGEBLIT
+- select VIDEO_SELECT
++ select VIDEO_SELECT if !XEN
+ ---help---
+ This driver is supposed to support the Trident Cyberblade/i1
+ graphics core integrated in the VIA VT8601A North Bridge,
+Index: head-2008-11-25/drivers/video/console/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/video/console/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/video/console/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -46,6 +46,7 @@ config VGACON_SOFT_SCROLLBACK_SIZE
+ config VIDEO_SELECT
+ bool "Video mode selection support"
+ depends on X86 && VGA_CONSOLE
++ depends on !XEN
+ ---help---
+ This enables support for text mode selection on kernel startup. If
+ you want to take advantage of some high-resolution text mode your
+Index: head-2008-11-25/drivers/xen/Kconfig
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/xen/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -1,6 +1,307 @@
++#
++# This Kconfig describe xen options
++#
++
++mainmenu "Xen Configuration"
++
++config XEN
++ bool
++
++if XEN
++config XEN_INTERFACE_VERSION
++ hex
++ default 0x00030207
++
++menu "XEN"
++
++config XEN_PRIVILEGED_GUEST
++ bool "Privileged Guest (domain 0)"
++ select PCI_REASSIGN if PCI
++ help
++ Support for privileged operation (domain 0)
++
++config XEN_UNPRIVILEGED_GUEST
++ def_bool !XEN_PRIVILEGED_GUEST
++
++config XEN_PRIVCMD
++ def_bool y
++ depends on PROC_FS
++
++config XEN_XENBUS_DEV
++ def_bool y
++ depends on PROC_FS
++
++config XEN_NETDEV_ACCEL_SFC_UTIL
++ depends on X86
++ tristate
++
++config XEN_BACKEND
++ tristate "Backend driver support"
++ default XEN_PRIVILEGED_GUEST
++ help
++ Support for backend device drivers that provide I/O services
++ to other virtual machines.
++
++config XEN_BLKDEV_BACKEND
++ tristate "Block-device backend driver"
++ depends on XEN_BACKEND
++ default XEN_BACKEND
++ help
++ The block-device backend driver allows the kernel to export its
++ block devices to other guests via a high-performance shared-memory
++ interface.
++
++config XEN_BLKDEV_TAP
++ tristate "Block-device tap backend driver"
++ depends on XEN_BACKEND
++ default XEN_BACKEND
++ help
++ The block tap driver is an alternative to the block back driver
++ and allows VM block requests to be redirected to userspace through
++ a device interface. The tap allows user-space development of
++ high-performance block backends, where disk images may be implemented
++ as files, in memory, or on other hosts across the network. This
++ driver can safely coexist with the existing blockback driver.
++
++config XEN_NETDEV_BACKEND
++ tristate "Network-device backend driver"
++ depends on XEN_BACKEND && NET
++ default XEN_BACKEND
++ help
++ The network-device backend driver allows the kernel to export its
++ network devices to other guests via a high-performance shared-memory
++ interface.
++
++config XEN_NETDEV_PIPELINED_TRANSMITTER
++ bool "Pipelined transmitter (DANGEROUS)"
++ depends on XEN_NETDEV_BACKEND
++ help
++ If the net backend is a dumb domain, such as a transparent Ethernet
++ bridge with no local IP interface, it is safe to say Y here to get
++ slightly lower network overhead.
++ If the backend has a local IP interface; or may be doing smart things
++ like reassembling packets to perform firewall filtering; or if you
++ are unsure; or if you experience network hangs when this option is
++ enabled; then you must say N here.
++
++config XEN_NETDEV_ACCEL_SFC_BACKEND
++ tristate "Network-device backend driver acceleration for Solarflare NICs"
++ depends on XEN_NETDEV_BACKEND && SFC && SFC_RESOURCE && X86
++ select XEN_NETDEV_ACCEL_SFC_UTIL
++ default m
++
++config XEN_NETDEV_LOOPBACK
++ tristate "Network-device loopback driver"
++ depends on XEN_NETDEV_BACKEND
++ help
++ A two-interface loopback device to emulate a local netfront-netback
++ connection. If unsure, it is probably safe to say N here.
++
++config XEN_PCIDEV_BACKEND
++ tristate "PCI-device backend driver"
++ depends on PCI && XEN_BACKEND
++ default XEN_BACKEND
++ help
++ The PCI device backend driver allows the kernel to export arbitrary
++ PCI devices to other guests. If you select this to be a module, you
++ will need to make sure no other driver has bound to the device(s)
++ you want to make visible to other guests.
++
++choice
++ prompt "PCI Backend Mode"
++ depends on XEN_PCIDEV_BACKEND
++ default XEN_PCIDEV_BACKEND_VPCI if !IA64
++ default XEN_PCIDEV_BACKEND_CONTROLLER if IA64
++
++config XEN_PCIDEV_BACKEND_VPCI
++ bool "Virtual PCI"
++ ---help---
++ This PCI Backend hides the true PCI topology and makes the frontend
++ think there is a single PCI bus with only the exported devices on it.
++ For example, a device at 03:05.0 will be re-assigned to 00:00.0. A
++ second device at 02:1a.1 will be re-assigned to 00:01.1.
++
++config XEN_PCIDEV_BACKEND_PASS
++ bool "Passthrough"
++ ---help---
++ This PCI Backend provides a real view of the PCI topology to the
++ frontend (for example, a device at 06:01.b will still appear at
++ 06:01.b to the frontend). This is similar to how Xen 2.0.x exposed
++ PCI devices to its driver domains. This may be required for drivers
++ which depend on finding their hardward in certain bus/slot
++ locations.
++
++config XEN_PCIDEV_BACKEND_SLOT
++ bool "Slot"
++ ---help---
++ This PCI Backend hides the true PCI topology and makes the frontend
++ think there is a single PCI bus with only the exported devices on it.
++ Contrary to the virtual PCI backend, a function becomes a new slot.
++ For example, a device at 03:05.2 will be re-assigned to 00:00.0. A
++ second device at 02:1a.1 will be re-assigned to 00:01.0.
++
++config XEN_PCIDEV_BACKEND_CONTROLLER
++ bool "Controller"
++ depends on IA64
++ ---help---
++ This PCI backend virtualizes the PCI bus topology by providing a
++ virtual bus per PCI root device. Devices which are physically under
++ the same root bus will appear on the same virtual bus. For systems
++ with complex I/O addressing, this is the only backend which supports
++ extended I/O port spaces and MMIO translation offsets. This backend
++ also supports slot virtualization. For example, a device at
++ 0000:01:02.1 will be re-assigned to 0000:00:00.0. A second device
++ at 0000:02:05.0 (behind a P2P bridge on bus 0000:01) will be
++ re-assigned to 0000:00:01.0. A third device at 0000:16:05.0 (under
++ a different PCI root bus) will be re-assigned to 0000:01:00.0.
++
++endchoice
++
++config XEN_PCIDEV_BE_DEBUG
++ bool "PCI Backend Debugging"
++ depends on XEN_PCIDEV_BACKEND
++
++config XEN_TPMDEV_BACKEND
++ tristate "TPM-device backend driver"
++ depends on XEN_BACKEND
++ help
++ The TPM-device backend driver
++
++config XEN_SCSI_BACKEND
++ tristate "SCSI backend driver"
++ depends on SCSI && XEN_BACKEND
++ default m
++ help
++ The SCSI backend driver allows the kernel to export its SCSI Devices
++ to other guests via a high-performance shared-memory interface.
++
++config XEN_BLKDEV_FRONTEND
++ tristate "Block-device frontend driver"
++ default y
++ help
++ The block-device frontend driver allows the kernel to access block
++ devices mounted within another guest OS. Unless you are building a
++ dedicated device-driver domain, or your master control domain
++ (domain 0), then you almost certainly want to say Y here.
++
++config XEN_NETDEV_FRONTEND
++ tristate "Network-device frontend driver"
++ depends on NET
++ default y
++ help
++ The network-device frontend driver allows the kernel to access
++ network interfaces within another guest OS. Unless you are building a
++ dedicated device-driver domain, or your master control domain
++ (domain 0), then you almost certainly want to say Y here.
++
++config XEN_NETDEV_ACCEL_SFC_FRONTEND
++ tristate "Network-device frontend driver acceleration for Solarflare NICs"
++ depends on XEN_NETDEV_FRONTEND && X86
++ select XEN_NETDEV_ACCEL_SFC_UTIL
++ default m
++
++config XEN_SCSI_FRONTEND
++ tristate "SCSI frontend driver"
++ depends on SCSI
++ default m
++ help
++ The SCSI frontend driver allows the kernel to access SCSI Devices
++ within another guest OS.
++
++config XEN_GRANT_DEV
++ tristate "User-space granted page access driver"
++ default XEN_PRIVILEGED_GUEST
++ help
++ Device for accessing (in user-space) pages that have been granted
++ by other domains.
++
++config XEN_FRAMEBUFFER
++ tristate "Framebuffer-device frontend driver"
++ depends on FB
++ select FB_CFB_FILLRECT
++ select FB_CFB_COPYAREA
++ select FB_CFB_IMAGEBLIT
++ default y
++ help
++ The framebuffer-device frontend drivers allows the kernel to create a
++ virtual framebuffer. This framebuffer can be viewed in another
++ domain. Unless this domain has access to a real video card, you
++ probably want to say Y here.
++
++config XEN_KEYBOARD
++ tristate "Keyboard-device frontend driver"
++ depends on XEN_FRAMEBUFFER && INPUT
++ default y
++ help
++ The keyboard-device frontend driver allows the kernel to create a
++ virtual keyboard. This keyboard can then be driven by another
++ domain. If you've said Y to CONFIG_XEN_FRAMEBUFFER, you probably
++ want to say Y here.
++
++config XEN_DISABLE_SERIAL
++ bool "Disable serial port drivers"
++ default y
++ help
++ Disable serial port drivers, allowing the Xen console driver
++ to provide a serial console at ttyS0.
++
++config XEN_SYSFS
++ tristate "Export Xen attributes in sysfs"
++ depends on SYSFS
++ select SYS_HYPERVISOR
++ default y
++ help
++ Xen hypervisor attributes will show up under /sys/hypervisor/.
++
++choice
++ prompt "Xen version compatibility"
++ default XEN_COMPAT_030002_AND_LATER
++
++ config XEN_COMPAT_030002_AND_LATER
++ bool "3.0.2 and later"
++
++ config XEN_COMPAT_030004_AND_LATER
++ bool "3.0.4 and later"
++
++ config XEN_COMPAT_030100_AND_LATER
++ bool "3.1.0 and later"
++
++ config XEN_COMPAT_LATEST_ONLY
++ bool "no compatibility code"
++
++endchoice
++
++config XEN_COMPAT
++ hex
++ default 0xffffff if XEN_COMPAT_LATEST_ONLY
++ default 0x030100 if XEN_COMPAT_030100_AND_LATER
++ default 0x030004 if XEN_COMPAT_030004_AND_LATER
++ default 0x030002 if XEN_COMPAT_030002_AND_LATER
++ default 0
++
++endmenu
++
++config HAVE_IRQ_IGNORE_UNHANDLED
++ def_bool y
++
++config NO_IDLE_HZ
++ def_bool y
++
++config XEN_SMPBOOT
++ def_bool y
++ depends on SMP && !PPC_XEN
++
++config XEN_XENCOMM
++ bool
++
++config XEN_DEVMEM
++ def_bool y
++
++endif
++
+ config XEN_BALLOON
+- bool "Xen memory balloon driver"
+- depends on XEN
++ bool "Xen memory balloon driver" if PARAVIRT_XEN
++ depends on (XEN && !PPC_XEN) || PARAVIRT_XEN
+ default y
+ help
+ The balloon driver allows the Xen domain to request more memory from
+@@ -8,12 +309,14 @@ config XEN_BALLOON
+ return unneeded memory to the system.
+
+ config XEN_SCRUB_PAGES
+- bool "Scrub pages before returning them to system"
+- depends on XEN_BALLOON
++ bool "Scrub memory before freeing it to Xen"
++ depends on XEN || XEN_BALLOON
+ default y
+ help
+- Scrub pages before returning them to the system for reuse by
+- other domains. This makes sure that any confidential data
+- is not accidentally visible to other domains. Is it more
+- secure, but slightly less efficient.
++ Erase memory contents before freeing it back to Xen's global
++ pool. This ensures that any secrets contained within that
++ memory (e.g., private keys) cannot be found by other guests that
++ may be running on the machine. Most people will want to say Y here.
++ If security is not a concern then you may increase performance by
++ saying N.
+ If in doubt, say yes.
+Index: head-2008-11-25/fs/Kconfig
+===================================================================
+--- head-2008-11-25.orig/fs/Kconfig 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/fs/Kconfig 2008-11-10 11:49:15.000000000 +0100
+@@ -1011,6 +1011,7 @@ config HUGETLBFS
+ bool "HugeTLB file system support"
+ depends on X86 || IA64 || PPC64 || SPARC64 || (SUPERH && MMU) || \
+ (S390 && 64BIT) || BROKEN
++ depends on !XEN
+ help
+ hugetlbfs is a filesystem backing for HugeTLB pages, based on
+ ramfs. For architectures that support it, say Y here and read
+Index: head-2008-11-25/kernel/Kconfig.preempt
+===================================================================
+--- head-2008-11-25.orig/kernel/Kconfig.preempt 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/kernel/Kconfig.preempt 2008-11-10 11:49:15.000000000 +0100
+@@ -35,6 +35,7 @@ config PREEMPT_VOLUNTARY
+
+ config PREEMPT
+ bool "Preemptible Kernel (Low-Latency Desktop)"
++ depends on !XEN
+ help
+ This option reduces the latency of the kernel by making
+ all kernel code (that is not executing in a critical section)
--- /dev/null
+Subject: xen3 common
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+List of files that don't require modification anymore (and hence
+removed from this patch), for reference and in case upstream wants to
+take the forward porting patches:
+2.6.22/include/linux/sched.h
+2.6.22/kernel/softlockup.c
+2.6.22/kernel/timer.c
+2.6.25/mm/highmem.c
+
+---
+ drivers/Makefile | 1
+ drivers/acpi/Makefile | 3
+ drivers/acpi/hardware/hwsleep.c | 15
+ drivers/acpi/processor_core.c | 72 +++
+ drivers/acpi/processor_extcntl.c | 241 +++++++++++
+ drivers/acpi/processor_idle.c | 24 -
+ drivers/acpi/processor_perflib.c | 21
+ drivers/acpi/sleep/main.c | 9
+ drivers/char/agp/intel-agp.c | 10
+ drivers/char/mem.c | 16
+ drivers/char/tpm/Makefile | 2
+ drivers/char/tpm/tpm.h | 15
+ drivers/char/tpm/tpm_vtpm.c | 542 +++++++++++++++++++++++++
+ drivers/char/tpm/tpm_vtpm.h | 55 ++
+ drivers/char/tpm/tpm_xen.c | 722 ++++++++++++++++++++++++++++++++++
+ drivers/ide/ide-lib.c | 8
+ drivers/oprofile/buffer_sync.c | 87 +++-
+ drivers/oprofile/cpu_buffer.c | 51 +-
+ drivers/oprofile/cpu_buffer.h | 9
+ drivers/oprofile/event_buffer.h | 3
+ drivers/oprofile/oprof.c | 30 +
+ drivers/oprofile/oprof.h | 3
+ drivers/oprofile/oprofile_files.c | 201 +++++++++
+ fs/compat_ioctl.c | 19
+ include/acpi/processor.h | 143 ++++++
+ include/asm-generic/pci.h | 2
+ include/asm-generic/pgtable.h | 4
+ include/linux/aio.h | 5
+ include/linux/highmem.h | 8
+ include/linux/interrupt.h | 6
+ include/linux/kexec.h | 13
+ include/linux/mm.h | 8
+ include/linux/oprofile.h | 12
+ include/linux/page-flags.h | 26 +
+ include/linux/pci.h | 11
+ include/linux/vermagic.h | 7
+ kernel/irq/spurious.c | 2
+ kernel/kexec.c | 71 ++-
+ kernel/sysctl.c | 2
+ mm/memory.c | 42 +
+ mm/mprotect.c | 2
+ mm/page_alloc.c | 12
+ net/core/dev.c | 62 ++
+ net/core/skbuff.c | 4
+ net/ipv4/netfilter/nf_nat_proto_tcp.c | 3
+ net/ipv4/netfilter/nf_nat_proto_udp.c | 4
+ net/ipv4/xfrm4_output.c | 2
+ scripts/Makefile.build | 14
+ scripts/Makefile.lib | 6
+ 51 files changed, 2671 insertions(+), 86 deletions(-)
+
+--- a/drivers/acpi/hardware/hwsleep.c
++++ b/drivers/acpi/hardware/hwsleep.c
+@@ -241,7 +241,11 @@ acpi_status asmlinkage acpi_enter_sleep_
+ u32 PM1Bcontrol;
+ struct acpi_bit_register_info *sleep_type_reg_info;
+ struct acpi_bit_register_info *sleep_enable_reg_info;
++#if !(defined(CONFIG_XEN) && defined(CONFIG_X86))
+ u32 in_value;
++#else
++ int err;
++#endif
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
+@@ -351,6 +355,7 @@ acpi_status asmlinkage acpi_enter_sleep_
+
+ ACPI_FLUSH_CPU_CACHE();
+
++#if !(defined(CONFIG_XEN) && defined(CONFIG_X86))
+ status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
+ PM1Acontrol);
+ if (ACPI_FAILURE(status)) {
+@@ -397,6 +402,16 @@ acpi_status asmlinkage acpi_enter_sleep_
+ /* Spin until we wake */
+
+ } while (!in_value);
++#else
++ /* PV ACPI just need check hypercall return value */
++ err = acpi_notify_hypervisor_state(sleep_state,
++ PM1Acontrol, PM1Bcontrol);
++ if (err) {
++ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
++ "Hypervisor failure [%d]\n", err));
++ return_ACPI_STATUS(AE_ERROR);
++ }
++#endif
+
+ return_ACPI_STATUS(AE_OK);
+ }
+--- a/drivers/acpi/Makefile
++++ b/drivers/acpi/Makefile
+@@ -34,6 +34,9 @@ processor-objs += processor_core.o proce
+ ifdef CONFIG_CPU_FREQ
+ processor-objs += processor_perflib.o
+ endif
++ifdef CONFIG_PROCESSOR_EXTERNAL_CONTROL
++processor-objs += processor_perflib.o processor_extcntl.o
++endif
+
+ obj-y += sleep/
+ obj-y += bus.o glue.o
+--- a/drivers/acpi/processor_core.c
++++ b/drivers/acpi/processor_core.c
+@@ -620,7 +620,8 @@ static int acpi_processor_get_info(struc
+ */
+ if (pr->id == -1) {
+ if (ACPI_FAILURE
+- (acpi_processor_hotadd_init(pr->handle, &pr->id))) {
++ (acpi_processor_hotadd_init(pr->handle, &pr->id)) &&
++ !processor_cntl_external()) {
+ return -ENODEV;
+ }
+ }
+@@ -662,7 +663,11 @@ static int acpi_processor_get_info(struc
+ return 0;
+ }
+
++#ifndef CONFIG_XEN
+ static DEFINE_PER_CPU(void *, processor_device_array);
++#else
++static void *processor_device_array[NR_ACPI_CPUS];
++#endif
+
+ static int __cpuinit acpi_processor_start(struct acpi_device *device)
+ {
+@@ -671,30 +676,46 @@ static int __cpuinit acpi_processor_star
+ struct acpi_processor *pr;
+ struct sys_device *sysdev;
+
++ processor_extcntl_init();
++
+ pr = acpi_driver_data(device);
+
+ result = acpi_processor_get_info(pr, device->flags.unique_id);
+- if (result) {
++ if (result ||
++ ((pr->id == -1) && !processor_cntl_external())) {
+ /* Processor is physically not present */
+ return 0;
+ }
+
+- BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0));
++ BUG_ON(!processor_cntl_external() &&
++ ((pr->id >= nr_cpu_ids) || (pr->id < 0)));
+
+ /*
+ * Buggy BIOS check
+ * ACPI id of processors can be reported wrongly by the BIOS.
+ * Don't trust it blindly
+ */
++#ifndef CONFIG_XEN
+ if (per_cpu(processor_device_array, pr->id) != NULL &&
+ per_cpu(processor_device_array, pr->id) != device) {
++#else
++ BUG_ON(pr->acpi_id >= NR_ACPI_CPUS);
++ if (processor_device_array[pr->acpi_id] != NULL &&
++ processor_device_array[pr->acpi_id] != device) {
++#endif
+ printk(KERN_WARNING "BIOS reported wrong ACPI id "
+ "for the processor\n");
+ return -ENODEV;
+ }
++#ifndef CONFIG_XEN
+ per_cpu(processor_device_array, pr->id) = device;
+
+ per_cpu(processors, pr->id) = pr;
++#else
++ processor_device_array[pr->acpi_id] = device;
++ if (pr->id != -1)
++ per_cpu(processors, pr->id) = pr;
++#endif
+
+ result = acpi_processor_add_fs(device);
+ if (result)
+@@ -710,15 +731,28 @@ static int __cpuinit acpi_processor_star
+ /* _PDC call should be done before doing anything else (if reqd.). */
+ arch_acpi_processor_init_pdc(pr);
+ acpi_processor_set_pdc(pr);
+-#ifdef CONFIG_CPU_FREQ
++#if defined(CONFIG_CPU_FREQ) || defined(CONFIG_PROCESSOR_EXTERNAL_CONTROL)
+ acpi_processor_ppc_has_changed(pr);
+ #endif
+- acpi_processor_get_throttling_info(pr);
+- acpi_processor_get_limit_info(pr);
++
++ /*
++ * pr->id may equal to -1 while processor_cntl_external enabled.
++ * throttle and thermal module don't support this case.
++ * Tx only works when dom0 vcpu == pcpu num by far, as we give
++ * control to dom0.
++ */
++ if (pr->id != -1) {
++ acpi_processor_get_throttling_info(pr);
++ acpi_processor_get_limit_info(pr);
++ }
+
+
+ acpi_processor_power_init(pr, device);
+
++ result = processor_extcntl_prepare(pr);
++ if (result)
++ goto end;
++
+ pr->cdev = thermal_cooling_device_register("Processor", device,
+ &processor_cooling_ops);
+ if (IS_ERR(pr->cdev)) {
+@@ -846,7 +880,7 @@ static int acpi_processor_remove(struct
+
+ pr = acpi_driver_data(device);
+
+- if (pr->id >= nr_cpu_ids) {
++ if (!processor_cntl_external() && pr->id >= nr_cpu_ids) {
+ kfree(pr);
+ return 0;
+ }
+@@ -872,8 +906,14 @@ static int acpi_processor_remove(struct
+ pr->cdev = NULL;
+ }
+
++#ifndef CONFIG_XEN
+ per_cpu(processors, pr->id) = NULL;
+ per_cpu(processor_device_array, pr->id) = NULL;
++#else
++ if (pr->id != -1)
++ per_cpu(processors, pr->id) = NULL;
++ processor_device_array[pr->acpi_id] = NULL;
++#endif
+ kfree(pr);
+
+ return 0;
+@@ -933,6 +973,10 @@ int acpi_processor_device_add(acpi_handl
+ if (!pr)
+ return -ENODEV;
+
++ if (processor_cntl_external())
++ processor_notify_external(pr,
++ PROCESSOR_HOTPLUG, HOTPLUG_TYPE_ADD);
++
+ if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) {
+ kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE);
+ }
+@@ -972,6 +1016,10 @@ static void __ref acpi_processor_hotplug
+ break;
+ }
+
++ if (processor_cntl_external())
++ processor_notify_external(pr,
++ PROCESSOR_HOTPLUG, HOTPLUG_TYPE_ADD);
++
+ if (pr->id >= 0 && (pr->id < nr_cpu_ids)) {
+ kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
+ break;
+@@ -1003,6 +1051,11 @@ static void __ref acpi_processor_hotplug
+
+ if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id)))
+ kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
++
++ if (processor_cntl_external())
++ processor_notify_external(pr, PROCESSOR_HOTPLUG,
++ HOTPLUG_TYPE_REMOVE);
++
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+@@ -1067,6 +1120,11 @@ static acpi_status acpi_processor_hotadd
+
+ static int acpi_processor_handle_eject(struct acpi_processor *pr)
+ {
++#ifdef CONFIG_XEN
++ if (pr->id == -1)
++ return (0);
++#endif
++
+ if (cpu_online(pr->id))
+ cpu_down(pr->id);
+
+--- /dev/null
++++ b/drivers/acpi/processor_extcntl.c
+@@ -0,0 +1,241 @@
++/*
++ * processor_extcntl.c - channel to external control logic
++ *
++ * Copyright (C) 2008, Intel corporation
++ *
++ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or (at
++ * your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful, but
++ * WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ * General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/types.h>
++#include <linux/acpi.h>
++#include <linux/pm.h>
++#include <linux/cpu.h>
++
++#include <acpi/processor.h>
++
++#define ACPI_PROCESSOR_COMPONENT 0x01000000
++#define ACPI_PROCESSOR_CLASS "processor"
++#define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver"
++#define _COMPONENT ACPI_PROCESSOR_COMPONENT
++ACPI_MODULE_NAME("acpi_processor")
++
++static int processor_extcntl_parse_csd(struct acpi_processor *pr);
++static int processor_extcntl_get_performance(struct acpi_processor *pr);
++/*
++ * External processor control logic may register with its own set of
++ * ops to get ACPI related notification. One example is like VMM.
++ */
++const struct processor_extcntl_ops *processor_extcntl_ops;
++EXPORT_SYMBOL(processor_extcntl_ops);
++
++static int processor_notify_smm(void)
++{
++ acpi_status status;
++ static int is_done = 0;
++
++ /* only need successfully notify BIOS once */
++ /* avoid double notification which may lead to unexpected result */
++ if (is_done)
++ return 0;
++
++ /* Can't write pstate_cnt to smi_cmd if either value is zero */
++ if ((!acpi_fadt.smi_cmd) || (!acpi_fadt.pstate_cnt)) {
++ ACPI_DEBUG_PRINT((ACPI_DB_INFO,"No SMI port or pstate_cnt\n"));
++ return 0;
++ }
++
++ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
++ "Writing pstate_cnt [0x%x] to smi_cmd [0x%x]\n",
++ acpi_fadt.pstate_cnt, acpi_fadt.smi_cmd));
++
++ /* FADT v1 doesn't support pstate_cnt, many BIOS vendors use
++ * it anyway, so we need to support it... */
++ if (acpi_fadt_is_v1) {
++ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
++ "Using v1.0 FADT reserved value for pstate_cnt\n"));
++ }
++
++ status = acpi_os_write_port(acpi_fadt.smi_cmd,
++ (u32) acpi_fadt.pstate_cnt, 8);
++ if (ACPI_FAILURE(status))
++ return status;
++
++ is_done = 1;
++
++ return 0;
++}
++
++int processor_notify_external(struct acpi_processor *pr, int event, int type)
++{
++ int ret = -EINVAL;
++
++ if (!processor_cntl_external())
++ return -EINVAL;
++
++ switch (event) {
++ case PROCESSOR_PM_INIT:
++ case PROCESSOR_PM_CHANGE:
++ if ((type >= PM_TYPE_MAX) ||
++ !processor_extcntl_ops->pm_ops[type])
++ break;
++
++ ret = processor_extcntl_ops->pm_ops[type](pr, event);
++ break;
++ case PROCESSOR_HOTPLUG:
++ if (processor_extcntl_ops->hotplug)
++ ret = processor_extcntl_ops->hotplug(pr, type);
++ break;
++ default:
++ printk(KERN_ERR "Unsupport processor events %d.\n", event);
++ break;
++ }
++
++ return ret;
++}
++
++/*
++ * External control logic can decide to grab full or part of physical
++ * processor control bits. Take a VMM for example, physical processors
++ * are owned by VMM and thus existence information like hotplug is
++ * always required to be notified to VMM. Similar is processor idle
++ * state which is also necessarily controlled by VMM. But for other
++ * control bits like performance/throttle states, VMM may choose to
++ * control or not upon its own policy.
++ */
++void processor_extcntl_init(void)
++{
++ if (!processor_extcntl_ops)
++ arch_acpi_processor_init_extcntl(&processor_extcntl_ops);
++}
++
++/*
++ * This is called from ACPI processor init, and targeted to hold
++ * some tricky housekeeping jobs to satisfy external control model.
++ * For example, we may put dependency parse stub here for idle
++ * and performance state. Those information may be not available
++ * if splitting from dom0 control logic like cpufreq driver.
++ */
++int processor_extcntl_prepare(struct acpi_processor *pr)
++{
++ /* parse cstate dependency information */
++ if (processor_pm_external())
++ processor_extcntl_parse_csd(pr);
++
++ /* Initialize performance states */
++ if (processor_pmperf_external())
++ processor_extcntl_get_performance(pr);
++
++ return 0;
++}
++
++/*
++ * Currently no _CSD is implemented which is why existing ACPI code
++ * doesn't parse _CSD at all. But to keep interface complete with
++ * external control logic, we put a placeholder here for future
++ * compatibility.
++ */
++static int processor_extcntl_parse_csd(struct acpi_processor *pr)
++{
++ int i;
++
++ for (i = 0; i < pr->power.count; i++) {
++ if (!pr->power.states[i].valid)
++ continue;
++
++ /* No dependency by default */
++ pr->power.states[i].domain_info = NULL;
++ pr->power.states[i].csd_count = 0;
++ }
++
++ return 0;
++}
++
++/*
++ * Existing ACPI module does parse performance states at some point,
++ * when acpi-cpufreq driver is loaded which however is something
++ * we'd like to disable to avoid confliction with external control
++ * logic. So we have to collect raw performance information here
++ * when ACPI processor object is found and started.
++ */
++static int processor_extcntl_get_performance(struct acpi_processor *pr)
++{
++ int ret;
++ struct acpi_processor_performance *perf;
++ struct acpi_psd_package *pdomain;
++
++ if (pr->performance)
++ return -EBUSY;
++
++ perf = kzalloc(sizeof(struct acpi_processor_performance), GFP_KERNEL);
++ if (!perf)
++ return -ENOMEM;
++
++ pr->performance = perf;
++ /* Get basic performance state information */
++ ret = acpi_processor_get_performance_info(pr);
++ if (ret < 0)
++ goto err_out;
++
++ /*
++ * Well, here we need retrieve performance dependency information
++ * from _PSD object. The reason why existing interface is not used
++ * is due to the reason that existing interface sticks to Linux cpu
++ * id to construct some bitmap, however we want to split ACPI
++ * processor objects from Linux cpu id logic. For example, even
++ * when Linux is configured as UP, we still want to parse all ACPI
++ * processor objects to external logic. In this case, it's preferred
++ * to use ACPI ID instead.
++ */
++ pdomain = &pr->performance->domain_info;
++ pdomain->num_processors = 0;
++ ret = acpi_processor_get_psd(pr);
++ if (ret < 0) {
++ /*
++ * _PSD is optional - assume no coordination if absent (or
++ * broken), matching native kernels' behavior.
++ */
++ pdomain->num_entries = ACPI_PSD_REV0_ENTRIES;
++ pdomain->revision = ACPI_PSD_REV0_REVISION;
++ pdomain->domain = pr->acpi_id;
++ pdomain->coord_type = DOMAIN_COORD_TYPE_SW_ALL;
++ pdomain->num_processors = 1;
++ }
++
++ /* Some sanity check */
++ if ((pdomain->revision != ACPI_PSD_REV0_REVISION) ||
++ (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) ||
++ ((pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL) &&
++ (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY) &&
++ (pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL))) {
++ ret = -EINVAL;
++ goto err_out;
++ }
++
++ /* Last step is to notify BIOS that external logic exists */
++ processor_notify_smm();
++
++ processor_notify_external(pr, PROCESSOR_PM_INIT, PM_TYPE_PERF);
++
++ return 0;
++err_out:
++ pr->performance = NULL;
++ kfree(perf);
++ return ret;
++}
+--- a/drivers/acpi/processor_idle.c
++++ b/drivers/acpi/processor_idle.c
+@@ -905,7 +905,8 @@ static int acpi_processor_get_power_info
+ */
+ cx.entry_method = ACPI_CSTATE_HALT;
+ snprintf(cx.desc, ACPI_CX_DESC_LEN, "ACPI HLT");
+- } else {
++ /* This doesn't apply to external control case */
++ } else if (!processor_pm_external()) {
+ continue;
+ }
+ if (cx.type == ACPI_STATE_C1 &&
+@@ -944,6 +945,12 @@ static int acpi_processor_get_power_info
+
+ cx.power = obj->integer.value;
+
++#ifdef CONFIG_PROCESSOR_EXTERNAL_CONTROL
++ /* cache control methods to notify external logic */
++ if (processor_pm_external())
++ memcpy(&cx.reg, reg, sizeof(*reg));
++#endif
++
+ current_count++;
+ memcpy(&(pr->power.states[current_count]), &cx, sizeof(cx));
+
+@@ -1285,14 +1292,18 @@ int acpi_processor_cst_has_changed(struc
+ * been initialized.
+ */
+ if (pm_idle_save) {
+- pm_idle = pm_idle_save;
++ if (!processor_pm_external())
++ pm_idle = pm_idle_save;
+ /* Relies on interrupts forcing exit from idle. */
+ synchronize_sched();
+ }
+
+ pr->flags.power = 0;
+ result = acpi_processor_get_power_info(pr);
+- if ((pr->flags.power == 1) && (pr->flags.power_setup_done))
++ if (processor_pm_external())
++ processor_notify_external(pr,
++ PROCESSOR_PM_CHANGE, PM_TYPE_IDLE);
++ else if ((pr->flags.power == 1) && (pr->flags.power_setup_done))
+ pm_idle = acpi_processor_idle;
+
+ return result;
+@@ -1814,7 +1825,7 @@ int __cpuinit acpi_processor_power_init(
+ printk(")\n");
+
+ #ifndef CONFIG_CPU_IDLE
+- if (pr->id == 0) {
++ if (!processor_pm_external() && (pr->id == 0)) {
+ pm_idle_save = pm_idle;
+ pm_idle = acpi_processor_idle;
+ }
+@@ -1828,6 +1839,11 @@ int __cpuinit acpi_processor_power_init(
+ acpi_driver_data(device));
+ if (!entry)
+ return -EIO;
++
++ if (processor_pm_external())
++ processor_notify_external(pr,
++ PROCESSOR_PM_INIT, PM_TYPE_IDLE);
++
+ return 0;
+ }
+
+--- a/drivers/acpi/processor_perflib.c
++++ b/drivers/acpi/processor_perflib.c
+@@ -80,6 +80,7 @@ MODULE_PARM_DESC(ignore_ppc, "If the fre
+
+ static int acpi_processor_ppc_status;
+
++#ifdef CONFIG_CPU_FREQ
+ static int acpi_processor_ppc_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
+ {
+@@ -122,6 +123,7 @@ static int acpi_processor_ppc_notifier(s
+ static struct notifier_block acpi_ppc_notifier_block = {
+ .notifier_call = acpi_processor_ppc_notifier,
+ };
++#endif /* CONFIG_CPU_FREQ */
+
+ static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
+ {
+@@ -166,9 +168,15 @@ int acpi_processor_ppc_has_changed(struc
+ if (ret < 0)
+ return (ret);
+ else
++#ifdef CONFIG_CPU_FREQ
+ return cpufreq_update_policy(pr->id);
++#elif CONFIG_PROCESSOR_EXTERNAL_CONTROL
++ return processor_notify_external(pr,
++ PROCESSOR_PM_CHANGE, PM_TYPE_PERF);
++#endif
+ }
+
++#ifdef CONFIG_CPU_FREQ
+ void acpi_processor_ppc_init(void)
+ {
+ if (!cpufreq_register_notifier
+@@ -187,6 +195,7 @@ void acpi_processor_ppc_exit(void)
+
+ acpi_processor_ppc_status &= ~PPC_REGISTERED;
+ }
++#endif /* CONFIG_CPU_FREQ */
+
+ static int acpi_processor_get_performance_control(struct acpi_processor *pr)
+ {
+@@ -328,7 +337,10 @@ static int acpi_processor_get_performanc
+ return result;
+ }
+
+-static int acpi_processor_get_performance_info(struct acpi_processor *pr)
++#ifndef CONFIG_PROCESSOR_EXTERNAL_CONTROL
++static
++#endif
++int acpi_processor_get_performance_info(struct acpi_processor *pr)
+ {
+ int result = 0;
+ acpi_status status = AE_OK;
+@@ -356,6 +368,7 @@ static int acpi_processor_get_performanc
+ return 0;
+ }
+
++#ifdef CONFIG_CPU_FREQ
+ int acpi_processor_notify_smm(struct module *calling_module)
+ {
+ acpi_status status;
+@@ -416,6 +429,7 @@ int acpi_processor_notify_smm(struct mod
+ }
+
+ EXPORT_SYMBOL(acpi_processor_notify_smm);
++#endif /* CONFIG_CPU_FREQ */
+
+ #ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF
+ /* /proc/acpi/processor/../performance interface (DEPRECATED) */
+@@ -507,7 +521,10 @@ static void acpi_cpufreq_remove_file(str
+ }
+ #endif /* CONFIG_X86_ACPI_CPUFREQ_PROC_INTF */
+
+-static int acpi_processor_get_psd(struct acpi_processor *pr)
++#ifndef CONFIG_PROCESSOR_EXTERNAL_CONTROL
++static
++#endif
++int acpi_processor_get_psd(struct acpi_processor *pr)
+ {
+ int result = 0;
+ acpi_status status = AE_OK;
+--- a/drivers/acpi/sleep/main.c
++++ b/drivers/acpi/sleep/main.c
+@@ -27,6 +27,7 @@ u8 sleep_states[ACPI_S_STATE_COUNT];
+ static int acpi_sleep_prepare(u32 acpi_state)
+ {
+ #ifdef CONFIG_ACPI_SLEEP
++#ifndef CONFIG_ACPI_PV_SLEEP
+ /* do we have a wakeup address for S2 and S3? */
+ if (acpi_state == ACPI_STATE_S3) {
+ if (!acpi_wakeup_address) {
+@@ -36,6 +37,7 @@ static int acpi_sleep_prepare(u32 acpi_s
+ (acpi_physical_address)acpi_wakeup_address);
+
+ }
++#endif
+ ACPI_FLUSH_CPU_CACHE();
+ acpi_enable_wakeup_device_prep(acpi_state);
+ #endif
+@@ -208,7 +210,14 @@ static int acpi_suspend_enter(suspend_st
+ break;
+
+ case ACPI_STATE_S3:
++#ifdef CONFIG_ACPI_PV_SLEEP
++ /* Hyperviosr will save and restore CPU context
++ * and then we can skip low level housekeeping here.
++ */
++ acpi_enter_sleep_state(acpi_state);
++#else
+ do_suspend_lowlevel();
++#endif
+ break;
+ }
+
+--- a/drivers/char/agp/intel-agp.c
++++ b/drivers/char/agp/intel-agp.c
+@@ -247,6 +247,13 @@ static void *i8xx_alloc_pages(void)
+ if (page == NULL)
+ return NULL;
+
++#ifdef CONFIG_XEN
++ if (xen_create_contiguous_region((unsigned long)page_address(page), 2, 32)) {
++ __free_pages(page, 2);
++ return NULL;
++ }
++#endif
++
+ if (set_pages_uc(page, 4) < 0) {
+ set_pages_wb(page, 4);
+ __free_pages(page, 2);
+@@ -266,6 +273,9 @@ static void i8xx_destroy_pages(void *add
+
+ page = virt_to_page(addr);
+ set_pages_wb(page, 4);
++#ifdef CONFIG_XEN
++ xen_destroy_contiguous_region((unsigned long)page_address(page), 2);
++#endif
+ put_page(page);
+ __free_pages(page, 2);
+ atomic_dec(&agp_bridge->current_memory_agp);
+--- a/drivers/char/mem.c
++++ b/drivers/char/mem.c
+@@ -110,6 +110,7 @@ void __attribute__((weak)) unxlate_dev_m
+ {
+ }
+
++#ifndef ARCH_HAS_DEV_MEM
+ /*
+ * This funcion reads the *physical* memory. The f_pos points directly to the
+ * memory location.
+@@ -254,6 +255,7 @@ static ssize_t write_mem(struct file * f
+ *ppos += written;
+ return written;
+ }
++#endif
+
+ int __attribute__((weak)) phys_mem_access_prot_allowed(struct file *file,
+ unsigned long pfn, unsigned long size, pgprot_t *vma_prot)
+@@ -372,6 +374,9 @@ static int mmap_mem(struct file * file,
+ static int mmap_kmem(struct file * file, struct vm_area_struct * vma)
+ {
+ unsigned long pfn;
++#ifdef CONFIG_XEN
++ unsigned long i, count;
++#endif
+
+ /* Turn a kernel-virtual address into a physical page frame */
+ pfn = __pa((u64)vma->vm_pgoff << PAGE_SHIFT) >> PAGE_SHIFT;
+@@ -386,6 +391,13 @@ static int mmap_kmem(struct file * file,
+ if (!pfn_valid(pfn))
+ return -EIO;
+
++#ifdef CONFIG_XEN
++ count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
++ for (i = 0; i < count; i++)
++ if ((pfn + i) != mfn_to_local_pfn(pfn_to_mfn(pfn + i)))
++ return -EIO;
++#endif
++
+ vma->vm_pgoff = pfn;
+ return mmap_mem(file, vma);
+ }
+@@ -802,6 +814,7 @@ static int open_port(struct inode * inod
+ #define open_kmem open_mem
+ #define open_oldmem open_mem
+
++#ifndef ARCH_HAS_DEV_MEM
+ static const struct file_operations mem_fops = {
+ .llseek = memory_lseek,
+ .read = read_mem,
+@@ -810,6 +823,9 @@ static const struct file_operations mem_
+ .open = open_mem,
+ .get_unmapped_area = get_unmapped_area_mem,
+ };
++#else
++extern const struct file_operations mem_fops;
++#endif
+
+ #ifdef CONFIG_DEVKMEM
+ static const struct file_operations kmem_fops = {
+--- a/drivers/char/tpm/Makefile
++++ b/drivers/char/tpm/Makefile
+@@ -9,3 +9,5 @@ obj-$(CONFIG_TCG_TIS) += tpm_tis.o
+ obj-$(CONFIG_TCG_NSC) += tpm_nsc.o
+ obj-$(CONFIG_TCG_ATMEL) += tpm_atmel.o
+ obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o
++obj-$(CONFIG_TCG_XEN) += tpm_xenu.o
++tpm_xenu-y = tpm_xen.o tpm_vtpm.o
+--- a/drivers/char/tpm/tpm.h
++++ b/drivers/char/tpm/tpm.h
+@@ -107,6 +107,9 @@ struct tpm_chip {
+ struct dentry **bios_dir;
+
+ struct list_head list;
++#ifdef CONFIG_XEN
++ void *priv;
++#endif
+ void (*release) (struct device *);
+ };
+
+@@ -124,6 +127,18 @@ static inline void tpm_write_index(int b
+ outb(value & 0xFF, base+1);
+ }
+
++#ifdef CONFIG_XEN
++static inline void *chip_get_private(const struct tpm_chip *chip)
++{
++ return chip->priv;
++}
++
++static inline void chip_set_private(struct tpm_chip *chip, void *priv)
++{
++ chip->priv = priv;
++}
++#endif
++
+ extern void tpm_get_timeouts(struct tpm_chip *);
+ extern void tpm_gen_interrupt(struct tpm_chip *);
+ extern void tpm_continue_selftest(struct tpm_chip *);
+--- /dev/null
++++ b/drivers/char/tpm/tpm_vtpm.c
+@@ -0,0 +1,542 @@
++/*
++ * Copyright (C) 2006 IBM Corporation
++ *
++ * Authors:
++ * Stefan Berger <stefanb@us.ibm.com>
++ *
++ * Generic device driver part for device drivers in a virtualized
++ * environment.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License as
++ * published by the Free Software Foundation, version 2 of the
++ * License.
++ *
++ */
++
++#include <asm/uaccess.h>
++#include <linux/list.h>
++#include <linux/device.h>
++#include <linux/interrupt.h>
++#include <linux/platform_device.h>
++#include "tpm.h"
++#include "tpm_vtpm.h"
++
++/* read status bits */
++enum {
++ STATUS_BUSY = 0x01,
++ STATUS_DATA_AVAIL = 0x02,
++ STATUS_READY = 0x04
++};
++
++struct transmission {
++ struct list_head next;
++
++ unsigned char *request;
++ size_t request_len;
++ size_t request_buflen;
++
++ unsigned char *response;
++ size_t response_len;
++ size_t response_buflen;
++
++ unsigned int flags;
++};
++
++enum {
++ TRANSMISSION_FLAG_WAS_QUEUED = 0x1
++};
++
++
++enum {
++ DATAEX_FLAG_QUEUED_ONLY = 0x1
++};
++
++
++/* local variables */
++
++/* local function prototypes */
++static int _vtpm_send_queued(struct tpm_chip *chip);
++
++
++/* =============================================================
++ * Some utility functions
++ * =============================================================
++ */
++static void vtpm_state_init(struct vtpm_state *vtpms)
++{
++ vtpms->current_request = NULL;
++ spin_lock_init(&vtpms->req_list_lock);
++ init_waitqueue_head(&vtpms->req_wait_queue);
++ INIT_LIST_HEAD(&vtpms->queued_requests);
++
++ vtpms->current_response = NULL;
++ spin_lock_init(&vtpms->resp_list_lock);
++ init_waitqueue_head(&vtpms->resp_wait_queue);
++
++ vtpms->disconnect_time = jiffies;
++}
++
++
++static inline struct transmission *transmission_alloc(void)
++{
++ return kzalloc(sizeof(struct transmission), GFP_ATOMIC);
++}
++
++static unsigned char *
++transmission_set_req_buffer(struct transmission *t,
++ unsigned char *buffer, size_t len)
++{
++ if (t->request_buflen < len) {
++ kfree(t->request);
++ t->request = kmalloc(len, GFP_KERNEL);
++ if (!t->request) {
++ t->request_buflen = 0;
++ return NULL;
++ }
++ t->request_buflen = len;
++ }
++
++ memcpy(t->request, buffer, len);
++ t->request_len = len;
++
++ return t->request;
++}
++
++static unsigned char *
++transmission_set_res_buffer(struct transmission *t,
++ const unsigned char *buffer, size_t len)
++{
++ if (t->response_buflen < len) {
++ kfree(t->response);
++ t->response = kmalloc(len, GFP_ATOMIC);
++ if (!t->response) {
++ t->response_buflen = 0;
++ return NULL;
++ }
++ t->response_buflen = len;
++ }
++
++ memcpy(t->response, buffer, len);
++ t->response_len = len;
++
++ return t->response;
++}
++
++static inline void transmission_free(struct transmission *t)
++{
++ kfree(t->request);
++ kfree(t->response);
++ kfree(t);
++}
++
++/* =============================================================
++ * Interface with the lower layer driver
++ * =============================================================
++ */
++/*
++ * Lower layer uses this function to make a response available.
++ */
++int vtpm_vd_recv(const struct tpm_chip *chip,
++ const unsigned char *buffer, size_t count,
++ void *ptr)
++{
++ unsigned long flags;
++ int ret_size = 0;
++ struct transmission *t;
++ struct vtpm_state *vtpms;
++
++ vtpms = (struct vtpm_state *)chip_get_private(chip);
++
++ /*
++ * The list with requests must contain one request
++ * only and the element there must be the one that
++ * was passed to me from the front-end.
++ */
++ spin_lock_irqsave(&vtpms->resp_list_lock, flags);
++ if (vtpms->current_request != ptr) {
++ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
++ return 0;
++ }
++
++ if ((t = vtpms->current_request)) {
++ transmission_free(t);
++ vtpms->current_request = NULL;
++ }
++
++ t = transmission_alloc();
++ if (t) {
++ if (!transmission_set_res_buffer(t, buffer, count)) {
++ transmission_free(t);
++ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
++ return -ENOMEM;
++ }
++ ret_size = count;
++ vtpms->current_response = t;
++ wake_up_interruptible(&vtpms->resp_wait_queue);
++ }
++ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
++
++ return ret_size;
++}
++
++
++/*
++ * Lower layer indicates its status (connected/disconnected)
++ */
++void vtpm_vd_status(const struct tpm_chip *chip, u8 vd_status)
++{
++ struct vtpm_state *vtpms;
++
++ vtpms = (struct vtpm_state *)chip_get_private(chip);
++
++ vtpms->vd_status = vd_status;
++ if ((vtpms->vd_status & TPM_VD_STATUS_CONNECTED) == 0) {
++ vtpms->disconnect_time = jiffies;
++ }
++}
++
++/* =============================================================
++ * Interface with the generic TPM driver
++ * =============================================================
++ */
++static int vtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count)
++{
++ int rc = 0;
++ unsigned long flags;
++ struct vtpm_state *vtpms;
++
++ vtpms = (struct vtpm_state *)chip_get_private(chip);
++
++ /*
++ * Check if the previous operation only queued the command
++ * In this case there won't be a response, so I just
++ * return from here and reset that flag. In any other
++ * case I should receive a response from the back-end.
++ */
++ spin_lock_irqsave(&vtpms->resp_list_lock, flags);
++ if ((vtpms->flags & DATAEX_FLAG_QUEUED_ONLY) != 0) {
++ vtpms->flags &= ~DATAEX_FLAG_QUEUED_ONLY;
++ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
++ /*
++ * The first few commands (measurements) must be
++ * queued since it might not be possible to talk to the
++ * TPM, yet.
++ * Return a response of up to 30 '0's.
++ */
++
++ count = min_t(size_t, count, 30);
++ memset(buf, 0x0, count);
++ return count;
++ }
++ /*
++ * Check whether something is in the responselist and if
++ * there's nothing in the list wait for something to appear.
++ */
++
++ if (!vtpms->current_response) {
++ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
++ interruptible_sleep_on_timeout(&vtpms->resp_wait_queue,
++ 1000);
++ spin_lock_irqsave(&vtpms->resp_list_lock ,flags);
++ }
++
++ if (vtpms->current_response) {
++ struct transmission *t = vtpms->current_response;
++ vtpms->current_response = NULL;
++ rc = min(count, t->response_len);
++ memcpy(buf, t->response, rc);
++ transmission_free(t);
++ }
++
++ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
++ return rc;
++}
++
++static int vtpm_send(struct tpm_chip *chip, u8 *buf, size_t count)
++{
++ int rc = 0;
++ unsigned long flags;
++ struct transmission *t = transmission_alloc();
++ struct vtpm_state *vtpms;
++
++ vtpms = (struct vtpm_state *)chip_get_private(chip);
++
++ if (!t)
++ return -ENOMEM;
++ /*
++ * If there's a current request, it must be the
++ * previous request that has timed out.
++ */
++ spin_lock_irqsave(&vtpms->req_list_lock, flags);
++ if (vtpms->current_request != NULL) {
++ printk("WARNING: Sending although there is a request outstanding.\n"
++ " Previous request must have timed out.\n");
++ transmission_free(vtpms->current_request);
++ vtpms->current_request = NULL;
++ }
++ spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
++
++ /*
++ * Queue the packet if the driver below is not
++ * ready, yet, or there is any packet already
++ * in the queue.
++ * If the driver below is ready, unqueue all
++ * packets first before sending our current
++ * packet.
++ * For each unqueued packet, except for the
++ * last (=current) packet, call the function
++ * tpm_xen_recv to wait for the response to come
++ * back.
++ */
++ if ((vtpms->vd_status & TPM_VD_STATUS_CONNECTED) == 0) {
++ if (time_after(jiffies,
++ vtpms->disconnect_time + HZ * 10)) {
++ rc = -ENOENT;
++ } else {
++ goto queue_it;
++ }
++ } else {
++ /*
++ * Send all queued packets.
++ */
++ if (_vtpm_send_queued(chip) == 0) {
++
++ vtpms->current_request = t;
++
++ rc = vtpm_vd_send(vtpms->tpm_private,
++ buf,
++ count,
++ t);
++ /*
++ * The generic TPM driver will call
++ * the function to receive the response.
++ */
++ if (rc < 0) {
++ vtpms->current_request = NULL;
++ goto queue_it;
++ }
++ } else {
++queue_it:
++ if (!transmission_set_req_buffer(t, buf, count)) {
++ transmission_free(t);
++ rc = -ENOMEM;
++ goto exit;
++ }
++ /*
++ * An error occurred. Don't event try
++ * to send the current request. Just
++ * queue it.
++ */
++ spin_lock_irqsave(&vtpms->req_list_lock, flags);
++ vtpms->flags |= DATAEX_FLAG_QUEUED_ONLY;
++ list_add_tail(&t->next, &vtpms->queued_requests);
++ spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
++ }
++ }
++
++exit:
++ return rc;
++}
++
++
++/*
++ * Send all queued requests.
++ */
++static int _vtpm_send_queued(struct tpm_chip *chip)
++{
++ int rc;
++ int error = 0;
++ long flags;
++ unsigned char buffer[1];
++ struct vtpm_state *vtpms;
++ vtpms = (struct vtpm_state *)chip_get_private(chip);
++
++ spin_lock_irqsave(&vtpms->req_list_lock, flags);
++
++ while (!list_empty(&vtpms->queued_requests)) {
++ /*
++ * Need to dequeue them.
++ * Read the result into a dummy buffer.
++ */
++ struct transmission *qt = (struct transmission *)
++ vtpms->queued_requests.next;
++ list_del(&qt->next);
++ vtpms->current_request = qt;
++ spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
++
++ rc = vtpm_vd_send(vtpms->tpm_private,
++ qt->request,
++ qt->request_len,
++ qt);
++
++ if (rc < 0) {
++ spin_lock_irqsave(&vtpms->req_list_lock, flags);
++ if ((qt = vtpms->current_request) != NULL) {
++ /*
++ * requeue it at the beginning
++ * of the list
++ */
++ list_add(&qt->next,
++ &vtpms->queued_requests);
++ }
++ vtpms->current_request = NULL;
++ error = 1;
++ break;
++ }
++ /*
++ * After this point qt is not valid anymore!
++ * It is freed when the front-end is delivering
++ * the data by calling tpm_recv
++ */
++ /*
++ * Receive response into provided dummy buffer
++ */
++ rc = vtpm_recv(chip, buffer, sizeof(buffer));
++ spin_lock_irqsave(&vtpms->req_list_lock, flags);
++ }
++
++ spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
++
++ return error;
++}
++
++static void vtpm_cancel(struct tpm_chip *chip)
++{
++ unsigned long flags;
++ struct vtpm_state *vtpms = (struct vtpm_state *)chip_get_private(chip);
++
++ spin_lock_irqsave(&vtpms->resp_list_lock,flags);
++
++ if (!vtpms->current_response && vtpms->current_request) {
++ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
++ interruptible_sleep_on(&vtpms->resp_wait_queue);
++ spin_lock_irqsave(&vtpms->resp_list_lock,flags);
++ }
++
++ if (vtpms->current_response) {
++ struct transmission *t = vtpms->current_response;
++ vtpms->current_response = NULL;
++ transmission_free(t);
++ }
++
++ spin_unlock_irqrestore(&vtpms->resp_list_lock,flags);
++}
++
++static u8 vtpm_status(struct tpm_chip *chip)
++{
++ u8 rc = 0;
++ unsigned long flags;
++ struct vtpm_state *vtpms;
++
++ vtpms = (struct vtpm_state *)chip_get_private(chip);
++
++ spin_lock_irqsave(&vtpms->resp_list_lock, flags);
++ /*
++ * Data are available if:
++ * - there's a current response
++ * - the last packet was queued only (this is fake, but necessary to
++ * get the generic TPM layer to call the receive function.)
++ */
++ if (vtpms->current_response ||
++ 0 != (vtpms->flags & DATAEX_FLAG_QUEUED_ONLY)) {
++ rc = STATUS_DATA_AVAIL;
++ } else if (!vtpms->current_response && !vtpms->current_request) {
++ rc = STATUS_READY;
++ }
++
++ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
++ return rc;
++}
++
++static struct file_operations vtpm_ops = {
++ .owner = THIS_MODULE,
++ .llseek = no_llseek,
++ .open = tpm_open,
++ .read = tpm_read,
++ .write = tpm_write,
++ .release = tpm_release,
++};
++
++static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
++static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
++static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
++static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
++static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
++static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated,
++ NULL);
++static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
++static DEVICE_ATTR(cancel, S_IWUSR |S_IWGRP, NULL, tpm_store_cancel);
++
++static struct attribute *vtpm_attrs[] = {
++ &dev_attr_pubek.attr,
++ &dev_attr_pcrs.attr,
++ &dev_attr_enabled.attr,
++ &dev_attr_active.attr,
++ &dev_attr_owned.attr,
++ &dev_attr_temp_deactivated.attr,
++ &dev_attr_caps.attr,
++ &dev_attr_cancel.attr,
++ NULL,
++};
++
++static struct attribute_group vtpm_attr_grp = { .attrs = vtpm_attrs };
++
++#define TPM_LONG_TIMEOUT (10 * 60 * HZ)
++
++static struct tpm_vendor_specific tpm_vtpm = {
++ .recv = vtpm_recv,
++ .send = vtpm_send,
++ .cancel = vtpm_cancel,
++ .status = vtpm_status,
++ .req_complete_mask = STATUS_BUSY | STATUS_DATA_AVAIL,
++ .req_complete_val = STATUS_DATA_AVAIL,
++ .req_canceled = STATUS_READY,
++ .attr_group = &vtpm_attr_grp,
++ .miscdev = {
++ .fops = &vtpm_ops,
++ },
++ .duration = {
++ TPM_LONG_TIMEOUT,
++ TPM_LONG_TIMEOUT,
++ TPM_LONG_TIMEOUT,
++ },
++};
++
++struct tpm_chip *init_vtpm(struct device *dev,
++ struct tpm_private *tp)
++{
++ long rc;
++ struct tpm_chip *chip;
++ struct vtpm_state *vtpms;
++
++ vtpms = kzalloc(sizeof(struct vtpm_state), GFP_KERNEL);
++ if (!vtpms)
++ return ERR_PTR(-ENOMEM);
++
++ vtpm_state_init(vtpms);
++ vtpms->tpm_private = tp;
++
++ chip = tpm_register_hardware(dev, &tpm_vtpm);
++ if (!chip) {
++ rc = -ENODEV;
++ goto err_free_mem;
++ }
++
++ chip_set_private(chip, vtpms);
++
++ return chip;
++
++err_free_mem:
++ kfree(vtpms);
++
++ return ERR_PTR(rc);
++}
++
++void cleanup_vtpm(struct device *dev)
++{
++ struct tpm_chip *chip = dev_get_drvdata(dev);
++ struct vtpm_state *vtpms = (struct vtpm_state*)chip_get_private(chip);
++ tpm_remove_hardware(dev);
++ kfree(vtpms);
++}
+--- /dev/null
++++ b/drivers/char/tpm/tpm_vtpm.h
+@@ -0,0 +1,55 @@
++#ifndef TPM_VTPM_H
++#define TPM_VTPM_H
++
++struct tpm_chip;
++struct tpm_private;
++
++struct vtpm_state {
++ struct transmission *current_request;
++ spinlock_t req_list_lock;
++ wait_queue_head_t req_wait_queue;
++
++ struct list_head queued_requests;
++
++ struct transmission *current_response;
++ spinlock_t resp_list_lock;
++ wait_queue_head_t resp_wait_queue; // processes waiting for responses
++
++ u8 vd_status;
++ u8 flags;
++
++ unsigned long disconnect_time;
++
++ /*
++ * The following is a private structure of the underlying
++ * driver. It is passed as parameter in the send function.
++ */
++ struct tpm_private *tpm_private;
++};
++
++
++enum vdev_status {
++ TPM_VD_STATUS_DISCONNECTED = 0x0,
++ TPM_VD_STATUS_CONNECTED = 0x1
++};
++
++/* this function is called from tpm_vtpm.c */
++int vtpm_vd_send(struct tpm_private * tp,
++ const u8 * buf, size_t count, void *ptr);
++
++/* these functions are offered by tpm_vtpm.c */
++struct tpm_chip *init_vtpm(struct device *,
++ struct tpm_private *);
++void cleanup_vtpm(struct device *);
++int vtpm_vd_recv(const struct tpm_chip* chip,
++ const unsigned char *buffer, size_t count, void *ptr);
++void vtpm_vd_status(const struct tpm_chip *, u8 status);
++
++static inline struct tpm_private *tpm_private_from_dev(struct device *dev)
++{
++ struct tpm_chip *chip = dev_get_drvdata(dev);
++ struct vtpm_state *vtpms = chip_get_private(chip);
++ return vtpms->tpm_private;
++}
++
++#endif
+--- /dev/null
++++ b/drivers/char/tpm/tpm_xen.c
+@@ -0,0 +1,722 @@
++/*
++ * Copyright (c) 2005, IBM Corporation
++ *
++ * Author: Stefan Berger, stefanb@us.ibm.com
++ * Grant table support: Mahadevan Gomathisankaran
++ *
++ * This code has been derived from drivers/xen/netfront/netfront.c
++ *
++ * Copyright (c) 2002-2004, K A Fraser
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include <linux/errno.h>
++#include <linux/err.h>
++#include <linux/interrupt.h>
++#include <linux/mutex.h>
++#include <asm/uaccess.h>
++#include <xen/evtchn.h>
++#include <xen/interface/grant_table.h>
++#include <xen/interface/io/tpmif.h>
++#include <xen/gnttab.h>
++#include <xen/xenbus.h>
++#include "tpm.h"
++#include "tpm_vtpm.h"
++
++#undef DEBUG
++
++/* local structures */
++struct tpm_private {
++ struct tpm_chip *chip;
++
++ tpmif_tx_interface_t *tx;
++ atomic_t refcnt;
++ unsigned int irq;
++ u8 is_connected;
++ u8 is_suspended;
++
++ spinlock_t tx_lock;
++
++ struct tx_buffer *tx_buffers[TPMIF_TX_RING_SIZE];
++
++ atomic_t tx_busy;
++ void *tx_remember;
++
++ domid_t backend_id;
++ wait_queue_head_t wait_q;
++
++ struct xenbus_device *dev;
++ int ring_ref;
++};
++
++struct tx_buffer {
++ unsigned int size; // available space in data
++ unsigned int len; // used space in data
++ unsigned char *data; // pointer to a page
++};
++
++
++/* locally visible variables */
++static grant_ref_t gref_head;
++static struct tpm_private *my_priv;
++
++/* local function prototypes */
++static irqreturn_t tpmif_int(int irq,
++ void *tpm_priv,
++ struct pt_regs *ptregs);
++static void tpmif_rx_action(unsigned long unused);
++static int tpmif_connect(struct xenbus_device *dev,
++ struct tpm_private *tp,
++ domid_t domid);
++static DECLARE_TASKLET(tpmif_rx_tasklet, tpmif_rx_action, 0);
++static int tpmif_allocate_tx_buffers(struct tpm_private *tp);
++static void tpmif_free_tx_buffers(struct tpm_private *tp);
++static void tpmif_set_connected_state(struct tpm_private *tp,
++ u8 newstate);
++static int tpm_xmit(struct tpm_private *tp,
++ const u8 * buf, size_t count, int userbuffer,
++ void *remember);
++static void destroy_tpmring(struct tpm_private *tp);
++void __exit tpmif_exit(void);
++
++#define DPRINTK(fmt, args...) \
++ pr_debug("xen_tpm_fr (%s:%d) " fmt, __FUNCTION__, __LINE__, ##args)
++#define IPRINTK(fmt, args...) \
++ printk(KERN_INFO "xen_tpm_fr: " fmt, ##args)
++#define WPRINTK(fmt, args...) \
++ printk(KERN_WARNING "xen_tpm_fr: " fmt, ##args)
++
++#define GRANT_INVALID_REF 0
++
++
++static inline int
++tx_buffer_copy(struct tx_buffer *txb, const u8 *src, int len,
++ int isuserbuffer)
++{
++ int copied = len;
++
++ if (len > txb->size)
++ copied = txb->size;
++ if (isuserbuffer) {
++ if (copy_from_user(txb->data, src, copied))
++ return -EFAULT;
++ } else {
++ memcpy(txb->data, src, copied);
++ }
++ txb->len = len;
++ return copied;
++}
++
++static inline struct tx_buffer *tx_buffer_alloc(void)
++{
++ struct tx_buffer *txb;
++
++ txb = kzalloc(sizeof(struct tx_buffer), GFP_KERNEL);
++ if (!txb)
++ return NULL;
++
++ txb->len = 0;
++ txb->size = PAGE_SIZE;
++ txb->data = (unsigned char *)__get_free_page(GFP_KERNEL);
++ if (txb->data == NULL) {
++ kfree(txb);
++ txb = NULL;
++ }
++
++ return txb;
++}
++
++
++static inline void tx_buffer_free(struct tx_buffer *txb)
++{
++ if (txb) {
++ free_page((long)txb->data);
++ kfree(txb);
++ }
++}
++
++/**************************************************************
++ Utility function for the tpm_private structure
++**************************************************************/
++static void tpm_private_init(struct tpm_private *tp)
++{
++ spin_lock_init(&tp->tx_lock);
++ init_waitqueue_head(&tp->wait_q);
++ atomic_set(&tp->refcnt, 1);
++}
++
++static void tpm_private_put(void)
++{
++ if (!atomic_dec_and_test(&my_priv->refcnt))
++ return;
++
++ tpmif_free_tx_buffers(my_priv);
++ kfree(my_priv);
++ my_priv = NULL;
++}
++
++static struct tpm_private *tpm_private_get(void)
++{
++ int err;
++
++ if (my_priv) {
++ atomic_inc(&my_priv->refcnt);
++ return my_priv;
++ }
++
++ my_priv = kzalloc(sizeof(struct tpm_private), GFP_KERNEL);
++ if (!my_priv)
++ return NULL;
++
++ tpm_private_init(my_priv);
++ err = tpmif_allocate_tx_buffers(my_priv);
++ if (err < 0)
++ tpm_private_put();
++
++ return my_priv;
++}
++
++/**************************************************************
++
++ The interface to let the tpm plugin register its callback
++ function and send data to another partition using this module
++
++**************************************************************/
++
++static DEFINE_MUTEX(suspend_lock);
++/*
++ * Send data via this module by calling this function
++ */
++int vtpm_vd_send(struct tpm_private *tp,
++ const u8 * buf, size_t count, void *ptr)
++{
++ int sent;
++
++ mutex_lock(&suspend_lock);
++ sent = tpm_xmit(tp, buf, count, 0, ptr);
++ mutex_unlock(&suspend_lock);
++
++ return sent;
++}
++
++/**************************************************************
++ XENBUS support code
++**************************************************************/
++
++static int setup_tpmring(struct xenbus_device *dev,
++ struct tpm_private *tp)
++{
++ tpmif_tx_interface_t *sring;
++ int err;
++
++ tp->ring_ref = GRANT_INVALID_REF;
++
++ sring = (void *)__get_free_page(GFP_KERNEL);
++ if (!sring) {
++ xenbus_dev_fatal(dev, -ENOMEM, "allocating shared ring");
++ return -ENOMEM;
++ }
++ tp->tx = sring;
++
++ err = xenbus_grant_ring(dev, virt_to_mfn(tp->tx));
++ if (err < 0) {
++ free_page((unsigned long)sring);
++ tp->tx = NULL;
++ xenbus_dev_fatal(dev, err, "allocating grant reference");
++ goto fail;
++ }
++ tp->ring_ref = err;
++
++ err = tpmif_connect(dev, tp, dev->otherend_id);
++ if (err)
++ goto fail;
++
++ return 0;
++fail:
++ destroy_tpmring(tp);
++ return err;
++}
++
++
++static void destroy_tpmring(struct tpm_private *tp)
++{
++ tpmif_set_connected_state(tp, 0);
++
++ if (tp->ring_ref != GRANT_INVALID_REF) {
++ gnttab_end_foreign_access(tp->ring_ref, (unsigned long)tp->tx);
++ tp->ring_ref = GRANT_INVALID_REF;
++ tp->tx = NULL;
++ }
++
++ if (tp->irq)
++ unbind_from_irqhandler(tp->irq, tp);
++
++ tp->irq = 0;
++}
++
++
++static int talk_to_backend(struct xenbus_device *dev,
++ struct tpm_private *tp)
++{
++ const char *message = NULL;
++ int err;
++ struct xenbus_transaction xbt;
++
++ err = setup_tpmring(dev, tp);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "setting up ring");
++ goto out;
++ }
++
++again:
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "starting transaction");
++ goto destroy_tpmring;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename,
++ "ring-ref","%u", tp->ring_ref);
++ if (err) {
++ message = "writing ring-ref";
++ goto abort_transaction;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
++ irq_to_evtchn_port(tp->irq));
++ if (err) {
++ message = "writing event-channel";
++ goto abort_transaction;
++ }
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err == -EAGAIN)
++ goto again;
++ if (err) {
++ xenbus_dev_fatal(dev, err, "completing transaction");
++ goto destroy_tpmring;
++ }
++
++ xenbus_switch_state(dev, XenbusStateConnected);
++
++ return 0;
++
++abort_transaction:
++ xenbus_transaction_end(xbt, 1);
++ if (message)
++ xenbus_dev_error(dev, err, "%s", message);
++destroy_tpmring:
++ destroy_tpmring(tp);
++out:
++ return err;
++}
++
++/**
++ * Callback received when the backend's state changes.
++ */
++static void backend_changed(struct xenbus_device *dev,
++ enum xenbus_state backend_state)
++{
++ struct tpm_private *tp = tpm_private_from_dev(&dev->dev);
++ DPRINTK("\n");
++
++ switch (backend_state) {
++ case XenbusStateInitialising:
++ case XenbusStateInitWait:
++ case XenbusStateInitialised:
++ case XenbusStateReconfiguring:
++ case XenbusStateReconfigured:
++ case XenbusStateUnknown:
++ break;
++
++ case XenbusStateConnected:
++ tpmif_set_connected_state(tp, 1);
++ break;
++
++ case XenbusStateClosing:
++ tpmif_set_connected_state(tp, 0);
++ xenbus_frontend_closed(dev);
++ break;
++
++ case XenbusStateClosed:
++ tpmif_set_connected_state(tp, 0);
++ if (tp->is_suspended == 0)
++ device_unregister(&dev->dev);
++ xenbus_frontend_closed(dev);
++ break;
++ }
++}
++
++static int tpmfront_probe(struct xenbus_device *dev,
++ const struct xenbus_device_id *id)
++{
++ int err;
++ int handle;
++ struct tpm_private *tp = tpm_private_get();
++
++ if (!tp)
++ return -ENOMEM;
++
++ tp->chip = init_vtpm(&dev->dev, tp);
++ if (IS_ERR(tp->chip))
++ return PTR_ERR(tp->chip);
++
++ err = xenbus_scanf(XBT_NIL, dev->nodename,
++ "handle", "%i", &handle);
++ if (XENBUS_EXIST_ERR(err))
++ return err;
++
++ if (err < 0) {
++ xenbus_dev_fatal(dev,err,"reading virtual-device");
++ return err;
++ }
++
++ tp->dev = dev;
++
++ err = talk_to_backend(dev, tp);
++ if (err) {
++ tpm_private_put();
++ return err;
++ }
++
++ return 0;
++}
++
++
++static int tpmfront_remove(struct xenbus_device *dev)
++{
++ struct tpm_private *tp = tpm_private_from_dev(&dev->dev);
++ destroy_tpmring(tp);
++ cleanup_vtpm(&dev->dev);
++ return 0;
++}
++
++static int tpmfront_suspend(struct xenbus_device *dev)
++{
++ struct tpm_private *tp = tpm_private_from_dev(&dev->dev);
++ u32 ctr;
++
++ /* Take the lock, preventing any application from sending. */
++ mutex_lock(&suspend_lock);
++ tp->is_suspended = 1;
++
++ for (ctr = 0; atomic_read(&tp->tx_busy); ctr++) {
++ if ((ctr % 10) == 0)
++ printk("TPM-FE [INFO]: Waiting for outstanding "
++ "request.\n");
++ /* Wait for a request to be responded to. */
++ interruptible_sleep_on_timeout(&tp->wait_q, 100);
++ }
++
++ return 0;
++}
++
++static int tpmfront_suspend_finish(struct tpm_private *tp)
++{
++ tp->is_suspended = 0;
++ /* Allow applications to send again. */
++ mutex_unlock(&suspend_lock);
++ return 0;
++}
++
++static int tpmfront_suspend_cancel(struct xenbus_device *dev)
++{
++ struct tpm_private *tp = tpm_private_from_dev(&dev->dev);
++ return tpmfront_suspend_finish(tp);
++}
++
++static int tpmfront_resume(struct xenbus_device *dev)
++{
++ struct tpm_private *tp = tpm_private_from_dev(&dev->dev);
++ destroy_tpmring(tp);
++ return talk_to_backend(dev, tp);
++}
++
++static int tpmif_connect(struct xenbus_device *dev,
++ struct tpm_private *tp,
++ domid_t domid)
++{
++ int err;
++
++ tp->backend_id = domid;
++
++ err = bind_listening_port_to_irqhandler(
++ domid, tpmif_int, SA_SAMPLE_RANDOM, "tpmif", tp);
++ if (err <= 0) {
++ WPRINTK("bind_listening_port_to_irqhandler failed "
++ "(err=%d)\n", err);
++ return err;
++ }
++ tp->irq = err;
++
++ return 0;
++}
++
++static struct xenbus_device_id tpmfront_ids[] = {
++ { "vtpm" },
++ { "" }
++};
++
++static struct xenbus_driver tpmfront = {
++ .name = "vtpm",
++ .owner = THIS_MODULE,
++ .ids = tpmfront_ids,
++ .probe = tpmfront_probe,
++ .remove = tpmfront_remove,
++ .resume = tpmfront_resume,
++ .otherend_changed = backend_changed,
++ .suspend = tpmfront_suspend,
++ .suspend_cancel = tpmfront_suspend_cancel,
++};
++
++static void __init init_tpm_xenbus(void)
++{
++ xenbus_register_frontend(&tpmfront);
++}
++
++static int tpmif_allocate_tx_buffers(struct tpm_private *tp)
++{
++ unsigned int i;
++
++ for (i = 0; i < TPMIF_TX_RING_SIZE; i++) {
++ tp->tx_buffers[i] = tx_buffer_alloc();
++ if (!tp->tx_buffers[i]) {
++ tpmif_free_tx_buffers(tp);
++ return -ENOMEM;
++ }
++ }
++ return 0;
++}
++
++static void tpmif_free_tx_buffers(struct tpm_private *tp)
++{
++ unsigned int i;
++
++ for (i = 0; i < TPMIF_TX_RING_SIZE; i++)
++ tx_buffer_free(tp->tx_buffers[i]);
++}
++
++static void tpmif_rx_action(unsigned long priv)
++{
++ struct tpm_private *tp = (struct tpm_private *)priv;
++ int i = 0;
++ unsigned int received;
++ unsigned int offset = 0;
++ u8 *buffer;
++ tpmif_tx_request_t *tx = &tp->tx->ring[i].req;
++
++ atomic_set(&tp->tx_busy, 0);
++ wake_up_interruptible(&tp->wait_q);
++
++ received = tx->size;
++
++ buffer = kmalloc(received, GFP_ATOMIC);
++ if (!buffer)
++ return;
++
++ for (i = 0; i < TPMIF_TX_RING_SIZE && offset < received; i++) {
++ struct tx_buffer *txb = tp->tx_buffers[i];
++ tpmif_tx_request_t *tx;
++ unsigned int tocopy;
++
++ tx = &tp->tx->ring[i].req;
++ tocopy = tx->size;
++ if (tocopy > PAGE_SIZE)
++ tocopy = PAGE_SIZE;
++
++ memcpy(&buffer[offset], txb->data, tocopy);
++
++ gnttab_release_grant_reference(&gref_head, tx->ref);
++
++ offset += tocopy;
++ }
++
++ vtpm_vd_recv(tp->chip, buffer, received, tp->tx_remember);
++ kfree(buffer);
++}
++
++
++static irqreturn_t tpmif_int(int irq, void *tpm_priv, struct pt_regs *ptregs)
++{
++ struct tpm_private *tp = tpm_priv;
++ unsigned long flags;
++
++ spin_lock_irqsave(&tp->tx_lock, flags);
++ tpmif_rx_tasklet.data = (unsigned long)tp;
++ tasklet_schedule(&tpmif_rx_tasklet);
++ spin_unlock_irqrestore(&tp->tx_lock, flags);
++
++ return IRQ_HANDLED;
++}
++
++
++static int tpm_xmit(struct tpm_private *tp,
++ const u8 * buf, size_t count, int isuserbuffer,
++ void *remember)
++{
++ tpmif_tx_request_t *tx;
++ TPMIF_RING_IDX i;
++ unsigned int offset = 0;
++
++ spin_lock_irq(&tp->tx_lock);
++
++ if (unlikely(atomic_read(&tp->tx_busy))) {
++ printk("tpm_xmit: There's an outstanding request/response "
++ "on the way!\n");
++ spin_unlock_irq(&tp->tx_lock);
++ return -EBUSY;
++ }
++
++ if (tp->is_connected != 1) {
++ spin_unlock_irq(&tp->tx_lock);
++ return -EIO;
++ }
++
++ for (i = 0; count > 0 && i < TPMIF_TX_RING_SIZE; i++) {
++ struct tx_buffer *txb = tp->tx_buffers[i];
++ int copied;
++
++ if (!txb) {
++ DPRINTK("txb (i=%d) is NULL. buffers initilized?\n"
++ "Not transmitting anything!\n", i);
++ spin_unlock_irq(&tp->tx_lock);
++ return -EFAULT;
++ }
++
++ copied = tx_buffer_copy(txb, &buf[offset], count,
++ isuserbuffer);
++ if (copied < 0) {
++ /* An error occurred */
++ spin_unlock_irq(&tp->tx_lock);
++ return copied;
++ }
++ count -= copied;
++ offset += copied;
++
++ tx = &tp->tx->ring[i].req;
++ tx->addr = virt_to_machine(txb->data);
++ tx->size = txb->len;
++ tx->unused = 0;
++
++ DPRINTK("First 4 characters sent by TPM-FE are "
++ "0x%02x 0x%02x 0x%02x 0x%02x\n",
++ txb->data[0],txb->data[1],txb->data[2],txb->data[3]);
++
++ /* Get the granttable reference for this page. */
++ tx->ref = gnttab_claim_grant_reference(&gref_head);
++ if (tx->ref == -ENOSPC) {
++ spin_unlock_irq(&tp->tx_lock);
++ DPRINTK("Grant table claim reference failed in "
++ "func:%s line:%d file:%s\n",
++ __FUNCTION__, __LINE__, __FILE__);
++ return -ENOSPC;
++ }
++ gnttab_grant_foreign_access_ref(tx->ref,
++ tp->backend_id,
++ virt_to_mfn(txb->data),
++ 0 /*RW*/);
++ wmb();
++ }
++
++ atomic_set(&tp->tx_busy, 1);
++ tp->tx_remember = remember;
++
++ mb();
++
++ notify_remote_via_irq(tp->irq);
++
++ spin_unlock_irq(&tp->tx_lock);
++ return offset;
++}
++
++
++static void tpmif_notify_upperlayer(struct tpm_private *tp)
++{
++ /* Notify upper layer about the state of the connection to the BE. */
++ vtpm_vd_status(tp->chip, (tp->is_connected
++ ? TPM_VD_STATUS_CONNECTED
++ : TPM_VD_STATUS_DISCONNECTED));
++}
++
++
++static void tpmif_set_connected_state(struct tpm_private *tp, u8 is_connected)
++{
++ /*
++ * Don't notify upper layer if we are in suspend mode and
++ * should disconnect - assumption is that we will resume
++ * The mutex keeps apps from sending.
++ */
++ if (is_connected == 0 && tp->is_suspended == 1)
++ return;
++
++ /*
++ * Unlock the mutex if we are connected again
++ * after being suspended - now resuming.
++ * This also removes the suspend state.
++ */
++ if (is_connected == 1 && tp->is_suspended == 1)
++ tpmfront_suspend_finish(tp);
++
++ if (is_connected != tp->is_connected) {
++ tp->is_connected = is_connected;
++ tpmif_notify_upperlayer(tp);
++ }
++}
++
++
++
++/* =================================================================
++ * Initialization function.
++ * =================================================================
++ */
++
++
++static int __init tpmif_init(void)
++{
++ struct tpm_private *tp;
++
++ if (is_initial_xendomain())
++ return -EPERM;
++
++ tp = tpm_private_get();
++ if (!tp)
++ return -ENOMEM;
++
++ IPRINTK("Initialising the vTPM driver.\n");
++ if (gnttab_alloc_grant_references(TPMIF_TX_RING_SIZE,
++ &gref_head) < 0) {
++ tpm_private_put();
++ return -EFAULT;
++ }
++
++ init_tpm_xenbus();
++ return 0;
++}
++
++
++module_init(tpmif_init);
++
++MODULE_LICENSE("Dual BSD/GPL");
+--- a/drivers/ide/ide-lib.c
++++ b/drivers/ide/ide-lib.c
+@@ -177,12 +177,12 @@ void ide_toggle_bounce(ide_drive_t *driv
+ {
+ u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
+
+- if (!PCI_DMA_BUS_IS_PHYS) {
+- addr = BLK_BOUNCE_ANY;
+- } else if (on && drive->media == ide_disk) {
++ if (on && drive->media == ide_disk) {
+ struct device *dev = drive->hwif->dev;
+
+- if (dev && dev->dma_mask)
++ if (!PCI_DMA_BUS_IS_PHYS)
++ addr = BLK_BOUNCE_ANY;
++ else if (dev && dev->dma_mask)
+ addr = *dev->dma_mask;
+ }
+
+--- a/drivers/Makefile
++++ b/drivers/Makefile
+@@ -37,6 +37,7 @@ obj-y += base/ block/ misc/ mfd/ net/
+ obj-$(CONFIG_NUBUS) += nubus/
+ obj-$(CONFIG_ATM) += atm/
+ obj-y += macintosh/
++obj-$(CONFIG_XEN) += xen/
+ obj-$(CONFIG_IDE) += ide/
+ obj-$(CONFIG_SCSI) += scsi/
+ obj-$(CONFIG_ATA) += ata/
+--- a/drivers/oprofile/buffer_sync.c
++++ b/drivers/oprofile/buffer_sync.c
+@@ -6,6 +6,10 @@
+ *
+ * @author John Levon <levon@movementarian.org>
+ *
++ * Modified by Aravind Menon for Xen
++ * These modifications are:
++ * Copyright (C) 2005 Hewlett-Packard Co.
++ *
+ * This is the core of the buffer management. Each
+ * CPU buffer is processed and entered into the
+ * global event buffer. Such processing is necessary
+@@ -40,6 +44,7 @@ static cpumask_t marked_cpus = CPU_MASK_
+ static DEFINE_SPINLOCK(task_mortuary);
+ static void process_task_mortuary(void);
+
++static int cpu_current_domain[NR_CPUS];
+
+ /* Take ownership of the task struct and place it on the
+ * list for processing. Only after two full buffer syncs
+@@ -148,6 +153,11 @@ static void end_sync(void)
+ int sync_start(void)
+ {
+ int err;
++ int i;
++
++ for (i = 0; i < NR_CPUS; i++) {
++ cpu_current_domain[i] = COORDINATOR_DOMAIN;
++ }
+
+ start_cpu_work();
+
+@@ -274,15 +284,31 @@ static void add_cpu_switch(int i)
+ last_cookie = INVALID_COOKIE;
+ }
+
+-static void add_kernel_ctx_switch(unsigned int in_kernel)
++static void add_cpu_mode_switch(unsigned int cpu_mode)
+ {
+ add_event_entry(ESCAPE_CODE);
+- if (in_kernel)
+- add_event_entry(KERNEL_ENTER_SWITCH_CODE);
+- else
+- add_event_entry(KERNEL_EXIT_SWITCH_CODE);
++ switch (cpu_mode) {
++ case CPU_MODE_USER:
++ add_event_entry(USER_ENTER_SWITCH_CODE);
++ break;
++ case CPU_MODE_KERNEL:
++ add_event_entry(KERNEL_ENTER_SWITCH_CODE);
++ break;
++ case CPU_MODE_XEN:
++ add_event_entry(XEN_ENTER_SWITCH_CODE);
++ break;
++ default:
++ break;
++ }
+ }
+-
++
++static void add_domain_switch(unsigned long domain_id)
++{
++ add_event_entry(ESCAPE_CODE);
++ add_event_entry(DOMAIN_SWITCH_CODE);
++ add_event_entry(domain_id);
++}
++
+ static void
+ add_user_ctx_switch(struct task_struct const * task, unsigned long cookie)
+ {
+@@ -347,9 +373,9 @@ static int add_us_sample(struct mm_struc
+ * for later lookup from userspace.
+ */
+ static int
+-add_sample(struct mm_struct * mm, struct op_sample * s, int in_kernel)
++add_sample(struct mm_struct * mm, struct op_sample * s, int cpu_mode)
+ {
+- if (in_kernel) {
++ if (cpu_mode >= CPU_MODE_KERNEL) {
+ add_sample_entry(s->eip, s->event);
+ return 1;
+ } else if (mm) {
+@@ -495,15 +521,21 @@ void sync_buffer(int cpu)
+ struct mm_struct *mm = NULL;
+ struct task_struct * new;
+ unsigned long cookie = 0;
+- int in_kernel = 1;
++ int cpu_mode = 1;
+ unsigned int i;
+ sync_buffer_state state = sb_buffer_start;
+ unsigned long available;
++ int domain_switch = 0;
+
+ mutex_lock(&buffer_mutex);
+
+ add_cpu_switch(cpu);
+
++ /* We need to assign the first samples in this CPU buffer to the
++ same domain that we were processing at the last sync_buffer */
++ if (cpu_current_domain[cpu] != COORDINATOR_DOMAIN) {
++ add_domain_switch(cpu_current_domain[cpu]);
++ }
+ /* Remember, only we can modify tail_pos */
+
+ available = get_slots(cpu_buf);
+@@ -511,16 +543,18 @@ void sync_buffer(int cpu)
+ for (i = 0; i < available; ++i) {
+ struct op_sample * s = &cpu_buf->buffer[cpu_buf->tail_pos];
+
+- if (is_code(s->eip)) {
+- if (s->event <= CPU_IS_KERNEL) {
+- /* kernel/userspace switch */
+- in_kernel = s->event;
++ if (is_code(s->eip) && !domain_switch) {
++ if (s->event <= CPU_MODE_XEN) {
++ /* xen/kernel/userspace switch */
++ cpu_mode = s->event;
+ if (state == sb_buffer_start)
+ state = sb_sample_start;
+- add_kernel_ctx_switch(s->event);
++ add_cpu_mode_switch(s->event);
+ } else if (s->event == CPU_TRACE_BEGIN) {
+ state = sb_bt_start;
+ add_trace_begin();
++ } else if (s->event == CPU_DOMAIN_SWITCH) {
++ domain_switch = 1;
+ } else {
+ struct mm_struct * oldmm = mm;
+
+@@ -534,11 +568,21 @@ void sync_buffer(int cpu)
+ add_user_ctx_switch(new, cookie);
+ }
+ } else {
+- if (state >= sb_bt_start &&
+- !add_sample(mm, s, in_kernel)) {
+- if (state == sb_bt_start) {
+- state = sb_bt_ignore;
+- atomic_inc(&oprofile_stats.bt_lost_no_mapping);
++ if (domain_switch) {
++ cpu_current_domain[cpu] = s->eip;
++ add_domain_switch(s->eip);
++ domain_switch = 0;
++ } else {
++ if (cpu_current_domain[cpu] !=
++ COORDINATOR_DOMAIN) {
++ add_sample_entry(s->eip, s->event);
++ }
++ else if (state >= sb_bt_start &&
++ !add_sample(mm, s, cpu_mode)) {
++ if (state == sb_bt_start) {
++ state = sb_bt_ignore;
++ atomic_inc(&oprofile_stats.bt_lost_no_mapping);
++ }
+ }
+ }
+ }
+@@ -547,6 +591,11 @@ void sync_buffer(int cpu)
+ }
+ release_mm(mm);
+
++ /* We reset domain to COORDINATOR at each CPU switch */
++ if (cpu_current_domain[cpu] != COORDINATOR_DOMAIN) {
++ add_domain_switch(COORDINATOR_DOMAIN);
++ }
++
+ mark_done(cpu);
+
+ mutex_unlock(&buffer_mutex);
+--- a/drivers/oprofile/cpu_buffer.c
++++ b/drivers/oprofile/cpu_buffer.c
+@@ -6,6 +6,10 @@
+ *
+ * @author John Levon <levon@movementarian.org>
+ *
++ * Modified by Aravind Menon for Xen
++ * These modifications are:
++ * Copyright (C) 2005 Hewlett-Packard Co.
++ *
+ * Each CPU has a local buffer that stores PC value/event
+ * pairs. We also log context switches when we notice them.
+ * Eventually each CPU's buffer is processed into the global
+@@ -34,6 +38,8 @@ static void wq_sync_buffer(struct work_s
+ #define DEFAULT_TIMER_EXPIRE (HZ / 10)
+ static int work_enabled;
+
++static int32_t current_domain = COORDINATOR_DOMAIN;
++
+ void free_cpu_buffers(void)
+ {
+ int i;
+@@ -72,7 +78,7 @@ int alloc_cpu_buffers(void)
+ goto fail;
+
+ b->last_task = NULL;
+- b->last_is_kernel = -1;
++ b->last_cpu_mode = -1;
+ b->tracing = 0;
+ b->buffer_size = buffer_size;
+ b->tail_pos = 0;
+@@ -130,7 +136,7 @@ void cpu_buffer_reset(struct oprofile_cp
+ * collected will populate the buffer with proper
+ * values to initialize the buffer
+ */
+- cpu_buf->last_is_kernel = -1;
++ cpu_buf->last_cpu_mode = -1;
+ cpu_buf->last_task = NULL;
+ }
+
+@@ -180,13 +186,13 @@ add_code(struct oprofile_cpu_buffer * bu
+ * because of the head/tail separation of the writer and reader
+ * of the CPU buffer.
+ *
+- * is_kernel is needed because on some architectures you cannot
++ * cpu_mode is needed because on some architectures you cannot
+ * tell if you are in kernel or user space simply by looking at
+- * pc. We tag this in the buffer by generating kernel enter/exit
+- * events whenever is_kernel changes
++ * pc. We tag this in the buffer by generating kernel/user (and xen)
++ * enter events whenever cpu_mode changes
+ */
+ static int log_sample(struct oprofile_cpu_buffer * cpu_buf, unsigned long pc,
+- int is_kernel, unsigned long event)
++ int cpu_mode, unsigned long event)
+ {
+ struct task_struct * task;
+
+@@ -202,18 +208,18 @@ static int log_sample(struct oprofile_cp
+ return 0;
+ }
+
+- is_kernel = !!is_kernel;
+-
+ task = current;
+
+ /* notice a switch from user->kernel or vice versa */
+- if (cpu_buf->last_is_kernel != is_kernel) {
+- cpu_buf->last_is_kernel = is_kernel;
+- add_code(cpu_buf, is_kernel);
++ if (cpu_buf->last_cpu_mode != cpu_mode) {
++ cpu_buf->last_cpu_mode = cpu_mode;
++ add_code(cpu_buf, cpu_mode);
+ }
+-
++
+ /* notice a task switch */
+- if (cpu_buf->last_task != task) {
++ /* if not processing other domain samples */
++ if ((cpu_buf->last_task != task) &&
++ (current_domain == COORDINATOR_DOMAIN)) {
+ cpu_buf->last_task = task;
+ add_code(cpu_buf, (unsigned long)task);
+ }
+@@ -297,6 +303,25 @@ void oprofile_add_trace(unsigned long pc
+ add_sample(cpu_buf, pc, 0);
+ }
+
++int oprofile_add_domain_switch(int32_t domain_id)
++{
++ struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[smp_processor_id()];
++
++ /* should have space for switching into and out of domain
++ (2 slots each) plus one sample and one cpu mode switch */
++ if (((nr_available_slots(cpu_buf) < 6) &&
++ (domain_id != COORDINATOR_DOMAIN)) ||
++ (nr_available_slots(cpu_buf) < 2))
++ return 0;
++
++ add_code(cpu_buf, CPU_DOMAIN_SWITCH);
++ add_sample(cpu_buf, domain_id, 0);
++
++ current_domain = domain_id;
++
++ return 1;
++}
++
+ /*
+ * This serves to avoid cpu buffer overflow, and makes sure
+ * the task mortuary progresses
+--- a/drivers/oprofile/cpu_buffer.h
++++ b/drivers/oprofile/cpu_buffer.h
+@@ -37,7 +37,7 @@ struct oprofile_cpu_buffer {
+ volatile unsigned long tail_pos;
+ unsigned long buffer_size;
+ struct task_struct * last_task;
+- int last_is_kernel;
++ int last_cpu_mode;
+ int tracing;
+ struct op_sample * buffer;
+ unsigned long sample_received;
+@@ -53,7 +53,10 @@ DECLARE_PER_CPU(struct oprofile_cpu_buff
+ void cpu_buffer_reset(struct oprofile_cpu_buffer * cpu_buf);
+
+ /* transient events for the CPU buffer -> event buffer */
+-#define CPU_IS_KERNEL 1
+-#define CPU_TRACE_BEGIN 2
++#define CPU_MODE_USER 0
++#define CPU_MODE_KERNEL 1
++#define CPU_MODE_XEN 2
++#define CPU_TRACE_BEGIN 3
++#define CPU_DOMAIN_SWITCH 4
+
+ #endif /* OPROFILE_CPU_BUFFER_H */
+--- a/drivers/oprofile/event_buffer.h
++++ b/drivers/oprofile/event_buffer.h
+@@ -30,6 +30,9 @@ void wake_up_buffer_waiter(void);
+ #define INVALID_COOKIE ~0UL
+ #define NO_COOKIE 0UL
+
++/* Constant used to refer to coordinator domain (Xen) */
++#define COORDINATOR_DOMAIN -1
++
+ extern const struct file_operations event_buffer_fops;
+
+ /* mutex between sync_cpu_buffers() and the
+--- a/drivers/oprofile/oprof.c
++++ b/drivers/oprofile/oprof.c
+@@ -5,6 +5,10 @@
+ * @remark Read the file COPYING
+ *
+ * @author John Levon <levon@movementarian.org>
++ *
++ * Modified by Aravind Menon for Xen
++ * These modifications are:
++ * Copyright (C) 2005 Hewlett-Packard Co.
+ */
+
+ #include <linux/kernel.h>
+@@ -33,6 +37,32 @@ static DEFINE_MUTEX(start_mutex);
+ */
+ static int timer = 0;
+
++int oprofile_set_active(int active_domains[], unsigned int adomains)
++{
++ int err;
++
++ if (!oprofile_ops.set_active)
++ return -EINVAL;
++
++ mutex_lock(&start_mutex);
++ err = oprofile_ops.set_active(active_domains, adomains);
++ mutex_unlock(&start_mutex);
++ return err;
++}
++
++int oprofile_set_passive(int passive_domains[], unsigned int pdomains)
++{
++ int err;
++
++ if (!oprofile_ops.set_passive)
++ return -EINVAL;
++
++ mutex_lock(&start_mutex);
++ err = oprofile_ops.set_passive(passive_domains, pdomains);
++ mutex_unlock(&start_mutex);
++ return err;
++}
++
+ int oprofile_setup(void)
+ {
+ int err;
+--- a/drivers/oprofile/oprof.h
++++ b/drivers/oprofile/oprof.h
+@@ -35,5 +35,8 @@ void oprofile_create_files(struct super_
+ void oprofile_timer_init(struct oprofile_operations * ops);
+
+ int oprofile_set_backtrace(unsigned long depth);
++
++int oprofile_set_active(int active_domains[], unsigned int adomains);
++int oprofile_set_passive(int passive_domains[], unsigned int pdomains);
+
+ #endif /* OPROF_H */
+--- a/drivers/oprofile/oprofile_files.c
++++ b/drivers/oprofile/oprofile_files.c
+@@ -5,15 +5,21 @@
+ * @remark Read the file COPYING
+ *
+ * @author John Levon <levon@movementarian.org>
++ *
++ * Modified by Aravind Menon for Xen
++ * These modifications are:
++ * Copyright (C) 2005 Hewlett-Packard Co.
+ */
+
+ #include <linux/fs.h>
+ #include <linux/oprofile.h>
++#include <asm/uaccess.h>
++#include <linux/ctype.h>
+
+ #include "event_buffer.h"
+ #include "oprofile_stats.h"
+ #include "oprof.h"
+-
++
+ unsigned long fs_buffer_size = 131072;
+ unsigned long fs_cpu_buffer_size = 8192;
+ unsigned long fs_buffer_watershed = 32768; /* FIXME: tune */
+@@ -117,11 +123,202 @@ static ssize_t dump_write(struct file *
+ static const struct file_operations dump_fops = {
+ .write = dump_write,
+ };
+-
++
++#define TMPBUFSIZE 512
++
++static unsigned int adomains = 0;
++static int active_domains[MAX_OPROF_DOMAINS + 1];
++static DEFINE_MUTEX(adom_mutex);
++
++static ssize_t adomain_write(struct file * file, char const __user * buf,
++ size_t count, loff_t * offset)
++{
++ char *tmpbuf;
++ char *startp, *endp;
++ int i;
++ unsigned long val;
++ ssize_t retval = count;
++
++ if (*offset)
++ return -EINVAL;
++ if (count > TMPBUFSIZE - 1)
++ return -EINVAL;
++
++ if (!(tmpbuf = kmalloc(TMPBUFSIZE, GFP_KERNEL)))
++ return -ENOMEM;
++
++ if (copy_from_user(tmpbuf, buf, count)) {
++ kfree(tmpbuf);
++ return -EFAULT;
++ }
++ tmpbuf[count] = 0;
++
++ mutex_lock(&adom_mutex);
++
++ startp = tmpbuf;
++ /* Parse one more than MAX_OPROF_DOMAINS, for easy error checking */
++ for (i = 0; i <= MAX_OPROF_DOMAINS; i++) {
++ val = simple_strtoul(startp, &endp, 0);
++ if (endp == startp)
++ break;
++ while (ispunct(*endp) || isspace(*endp))
++ endp++;
++ active_domains[i] = val;
++ if (active_domains[i] != val)
++ /* Overflow, force error below */
++ i = MAX_OPROF_DOMAINS + 1;
++ startp = endp;
++ }
++ /* Force error on trailing junk */
++ adomains = *startp ? MAX_OPROF_DOMAINS + 1 : i;
++
++ kfree(tmpbuf);
++
++ if (adomains > MAX_OPROF_DOMAINS
++ || oprofile_set_active(active_domains, adomains)) {
++ adomains = 0;
++ retval = -EINVAL;
++ }
++
++ mutex_unlock(&adom_mutex);
++ return retval;
++}
++
++static ssize_t adomain_read(struct file * file, char __user * buf,
++ size_t count, loff_t * offset)
++{
++ char * tmpbuf;
++ size_t len;
++ int i;
++ ssize_t retval;
++
++ if (!(tmpbuf = kmalloc(TMPBUFSIZE, GFP_KERNEL)))
++ return -ENOMEM;
++
++ mutex_lock(&adom_mutex);
++
++ len = 0;
++ for (i = 0; i < adomains; i++)
++ len += snprintf(tmpbuf + len,
++ len < TMPBUFSIZE ? TMPBUFSIZE - len : 0,
++ "%u ", active_domains[i]);
++ WARN_ON(len > TMPBUFSIZE);
++ if (len != 0 && len <= TMPBUFSIZE)
++ tmpbuf[len-1] = '\n';
++
++ mutex_unlock(&adom_mutex);
++
++ retval = simple_read_from_buffer(buf, count, offset, tmpbuf, len);
++
++ kfree(tmpbuf);
++ return retval;
++}
++
++
++static struct file_operations active_domain_ops = {
++ .read = adomain_read,
++ .write = adomain_write,
++};
++
++static unsigned int pdomains = 0;
++static int passive_domains[MAX_OPROF_DOMAINS];
++static DEFINE_MUTEX(pdom_mutex);
++
++static ssize_t pdomain_write(struct file * file, char const __user * buf,
++ size_t count, loff_t * offset)
++{
++ char *tmpbuf;
++ char *startp, *endp;
++ int i;
++ unsigned long val;
++ ssize_t retval = count;
++
++ if (*offset)
++ return -EINVAL;
++ if (count > TMPBUFSIZE - 1)
++ return -EINVAL;
++
++ if (!(tmpbuf = kmalloc(TMPBUFSIZE, GFP_KERNEL)))
++ return -ENOMEM;
++
++ if (copy_from_user(tmpbuf, buf, count)) {
++ kfree(tmpbuf);
++ return -EFAULT;
++ }
++ tmpbuf[count] = 0;
++
++ mutex_lock(&pdom_mutex);
++
++ startp = tmpbuf;
++ /* Parse one more than MAX_OPROF_DOMAINS, for easy error checking */
++ for (i = 0; i <= MAX_OPROF_DOMAINS; i++) {
++ val = simple_strtoul(startp, &endp, 0);
++ if (endp == startp)
++ break;
++ while (ispunct(*endp) || isspace(*endp))
++ endp++;
++ passive_domains[i] = val;
++ if (passive_domains[i] != val)
++ /* Overflow, force error below */
++ i = MAX_OPROF_DOMAINS + 1;
++ startp = endp;
++ }
++ /* Force error on trailing junk */
++ pdomains = *startp ? MAX_OPROF_DOMAINS + 1 : i;
++
++ kfree(tmpbuf);
++
++ if (pdomains > MAX_OPROF_DOMAINS
++ || oprofile_set_passive(passive_domains, pdomains)) {
++ pdomains = 0;
++ retval = -EINVAL;
++ }
++
++ mutex_unlock(&pdom_mutex);
++ return retval;
++}
++
++static ssize_t pdomain_read(struct file * file, char __user * buf,
++ size_t count, loff_t * offset)
++{
++ char * tmpbuf;
++ size_t len;
++ int i;
++ ssize_t retval;
++
++ if (!(tmpbuf = kmalloc(TMPBUFSIZE, GFP_KERNEL)))
++ return -ENOMEM;
++
++ mutex_lock(&pdom_mutex);
++
++ len = 0;
++ for (i = 0; i < pdomains; i++)
++ len += snprintf(tmpbuf + len,
++ len < TMPBUFSIZE ? TMPBUFSIZE - len : 0,
++ "%u ", passive_domains[i]);
++ WARN_ON(len > TMPBUFSIZE);
++ if (len != 0 && len <= TMPBUFSIZE)
++ tmpbuf[len-1] = '\n';
++
++ mutex_unlock(&pdom_mutex);
++
++ retval = simple_read_from_buffer(buf, count, offset, tmpbuf, len);
++
++ kfree(tmpbuf);
++ return retval;
++}
++
++static struct file_operations passive_domain_ops = {
++ .read = pdomain_read,
++ .write = pdomain_write,
++};
++
+ void oprofile_create_files(struct super_block * sb, struct dentry * root)
+ {
+ oprofilefs_create_file(sb, root, "enable", &enable_fops);
+ oprofilefs_create_file_perm(sb, root, "dump", &dump_fops, 0666);
++ oprofilefs_create_file(sb, root, "active_domains", &active_domain_ops);
++ oprofilefs_create_file(sb, root, "passive_domains", &passive_domain_ops);
+ oprofilefs_create_file(sb, root, "buffer", &event_buffer_fops);
+ oprofilefs_create_ulong(sb, root, "buffer_size", &fs_buffer_size);
+ oprofilefs_create_ulong(sb, root, "buffer_watershed", &fs_buffer_watershed);
+#--- a/fs/aio.c
+#+++ b/fs/aio.c
+#@@ -36,6 +36,11 @@
+# #include <asm/uaccess.h>
+# #include <asm/mmu_context.h>
+
+#+#ifdef CONFIG_EPOLL
+#+#include <linux/poll.h>
+#+#include <linux/eventpoll.h>
+#+#endif
+#+
+# #if DEBUG > 1
+# #define dprintk printk
+# #else
+#@@ -1010,6 +1015,11 @@ put_rq:
+# if (waitqueue_active(&ctx->wait))
+# wake_up(&ctx->wait);
+#
+#+#ifdef CONFIG_EPOLL
+#+ if (ctx->file && waitqueue_active(&ctx->poll_wait))
+#+ wake_up(&ctx->poll_wait);
+#+#endif
+#+
+# spin_unlock_irqrestore(&ctx->ctx_lock, flags);
+# return ret;
+# }
+#@@ -1017,6 +1027,8 @@ put_rq:
+# /* aio_read_evt
+# * Pull an event off of the ioctx's event ring. Returns the number of
+# * events fetched (0 or 1 ;-)
+#+ * If ent parameter is 0, just returns the number of events that would
+#+ * be fetched.
+# * FIXME: make this use cmpxchg.
+# * TODO: make the ringbuffer user mmap()able (requires FIXME).
+# */
+#@@ -1039,13 +1051,18 @@ static int aio_read_evt(struct kioctx *i
+#
+# head = ring->head % info->nr;
+# if (head != ring->tail) {
+#- struct io_event *evp = aio_ring_event(info, head, KM_USER1);
+#- *ent = *evp;
+#- head = (head + 1) % info->nr;
+#- smp_mb(); /* finish reading the event before updatng the head */
+#- ring->head = head;
+#- ret = 1;
+#- put_aio_ring_event(evp, KM_USER1);
+#+ if (ent) { /* event requested */
+#+ struct io_event *evp =
+#+ aio_ring_event(info, head, KM_USER1);
+#+ *ent = *evp;
+#+ head = (head + 1) % info->nr;
+#+ /* finish reading the event before updatng the head */
+#+ smp_mb();
+#+ ring->head = head;
+#+ ret = 1;
+#+ put_aio_ring_event(evp, KM_USER1);
+#+ } else /* only need to know availability */
+#+ ret = 1;
+# }
+# spin_unlock(&info->ring_lock);
+#
+#@@ -1235,6 +1252,13 @@ static void io_destroy(struct kioctx *io
+#
+# aio_cancel_all(ioctx);
+# wait_for_all_aios(ioctx);
+#+#ifdef CONFIG_EPOLL
+#+ /* forget the poll file, but it's up to the user to close it */
+#+ if (ioctx->file) {
+#+ ioctx->file->private_data = 0;
+#+ ioctx->file = 0;
+#+ }
+#+#endif
+#
+# /*
+# * Wake up any waiters. The setting of ctx->dead must be seen
+#@@ -1245,6 +1269,67 @@ static void io_destroy(struct kioctx *io
+# put_ioctx(ioctx); /* once for the lookup */
+# }
+#
+#+#ifdef CONFIG_EPOLL
+#+
+#+static int aio_queue_fd_close(struct inode *inode, struct file *file)
+#+{
+#+ struct kioctx *ioctx = file->private_data;
+#+ if (ioctx) {
+#+ file->private_data = 0;
+#+ spin_lock_irq(&ioctx->ctx_lock);
+#+ ioctx->file = 0;
+#+ spin_unlock_irq(&ioctx->ctx_lock);
+#+ }
+#+ return 0;
+#+}
+#+
+#+static unsigned int aio_queue_fd_poll(struct file *file, poll_table *wait)
+#+{ unsigned int pollflags = 0;
+#+ struct kioctx *ioctx = file->private_data;
+#+
+#+ if (ioctx) {
+#+
+#+ spin_lock_irq(&ioctx->ctx_lock);
+#+ /* Insert inside our poll wait queue */
+#+ poll_wait(file, &ioctx->poll_wait, wait);
+#+
+#+ /* Check our condition */
+#+ if (aio_read_evt(ioctx, 0))
+#+ pollflags = POLLIN | POLLRDNORM;
+#+ spin_unlock_irq(&ioctx->ctx_lock);
+#+ }
+#+
+#+ return pollflags;
+#+}
+#+
+#+static const struct file_operations aioq_fops = {
+#+ .release = aio_queue_fd_close,
+#+ .poll = aio_queue_fd_poll
+#+};
+#+
+#+/* make_aio_fd:
+#+ * Create a file descriptor that can be used to poll the event queue.
+#+ * Based and piggybacked on the excellent epoll code.
+#+ */
+#+
+#+static int make_aio_fd(struct kioctx *ioctx)
+#+{
+#+ int error, fd;
+#+ struct inode *inode;
+#+ struct file *file;
+#+
+#+ error = ep_getfd(&fd, &inode, &file, NULL, &aioq_fops);
+#+ if (error)
+#+ return error;
+#+
+#+ /* associate the file with the IO context */
+#+ file->private_data = ioctx;
+#+ ioctx->file = file;
+#+ init_waitqueue_head(&ioctx->poll_wait);
+#+ return fd;
+#+}
+#+#endif
+#+
+# /* sys_io_setup:
+# * Create an aio_context capable of receiving at least nr_events.
+# * ctxp must not point to an aio_context that already exists, and
+#@@ -1257,18 +1342,30 @@ static void io_destroy(struct kioctx *io
+# * resources are available. May fail with -EFAULT if an invalid
+# * pointer is passed for ctxp. Will fail with -ENOSYS if not
+# * implemented.
+#+ *
+#+ * To request a selectable fd, the user context has to be initialized
+#+ * to 1, instead of 0, and the return value is the fd.
+#+ * This keeps the system call compatible, since a non-zero value
+#+ * was not allowed so far.
+# */
+# asmlinkage long sys_io_setup(unsigned nr_events, aio_context_t __user *ctxp)
+# {
+# struct kioctx *ioctx = NULL;
+# unsigned long ctx;
+# long ret;
+#+ int make_fd = 0;
+#
+# ret = get_user(ctx, ctxp);
+# if (unlikely(ret))
+# goto out;
+#
+# ret = -EINVAL;
+#+#ifdef CONFIG_EPOLL
+#+ if (ctx == 1) {
+#+ make_fd = 1;
+#+ ctx = 0;
+#+ }
+#+#endif
+# if (unlikely(ctx || nr_events == 0)) {
+# pr_debug("EINVAL: io_setup: ctx %lu nr_events %u\n",
+# ctx, nr_events);
+#@@ -1279,8 +1376,12 @@ asmlinkage long sys_io_setup(unsigned nr
+# ret = PTR_ERR(ioctx);
+# if (!IS_ERR(ioctx)) {
+# ret = put_user(ioctx->user_id, ctxp);
+#- if (!ret)
+#- return 0;
+#+#ifdef CONFIG_EPOLL
+#+ if (make_fd && ret >= 0)
+#+ ret = make_aio_fd(ioctx);
+#+#endif
+#+ if (ret >= 0)
+#+ return ret;
+#
+# get_ioctx(ioctx); /* io_destroy() expects us to hold a ref */
+# io_destroy(ioctx);
+--- a/fs/compat_ioctl.c
++++ b/fs/compat_ioctl.c
+@@ -114,6 +114,13 @@
+ #include <asm/fbio.h>
+ #endif
+
++#ifdef CONFIG_XEN
++#include <xen/interface/xen.h>
++#include <xen/public/evtchn.h>
++#include <xen/public/privcmd.h>
++#include <xen/compat_ioctl.h>
++#endif
++
+ static int do_ioctl32_pointer(unsigned int fd, unsigned int cmd,
+ unsigned long arg, struct file *f)
+ {
+@@ -2727,6 +2734,18 @@ IGNORE_IOCTL(FBIOGETCMAP32)
+ IGNORE_IOCTL(FBIOSCURSOR32)
+ IGNORE_IOCTL(FBIOGCURSOR32)
+ #endif
++
++#ifdef CONFIG_XEN
++HANDLE_IOCTL(IOCTL_PRIVCMD_MMAP_32, privcmd_ioctl_32)
++HANDLE_IOCTL(IOCTL_PRIVCMD_MMAPBATCH_32, privcmd_ioctl_32)
++COMPATIBLE_IOCTL(IOCTL_PRIVCMD_HYPERCALL)
++COMPATIBLE_IOCTL(IOCTL_EVTCHN_BIND_VIRQ)
++COMPATIBLE_IOCTL(IOCTL_EVTCHN_BIND_INTERDOMAIN)
++COMPATIBLE_IOCTL(IOCTL_EVTCHN_BIND_UNBOUND_PORT)
++COMPATIBLE_IOCTL(IOCTL_EVTCHN_UNBIND)
++COMPATIBLE_IOCTL(IOCTL_EVTCHN_NOTIFY)
++COMPATIBLE_IOCTL(IOCTL_EVTCHN_RESET)
++#endif
+ };
+
+ #define IOCTL_HASHSIZE 256
+--- a/include/acpi/processor.h
++++ b/include/acpi/processor.h
+@@ -17,6 +17,12 @@
+ #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
+ #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
+
++#ifdef CONFIG_XEN
++#define NR_ACPI_CPUS (NR_CPUS < 256 ? 256 : NR_CPUS)
++#else
++#define NR_ACPI_CPUS NR_CPUS
++#endif /* CONFIG_XEN */
++
+ #define ACPI_PDC_REVISION_ID 0x1
+
+ #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
+@@ -42,6 +48,17 @@
+
+ struct acpi_processor_cx;
+
++#ifdef CONFIG_PROCESSOR_EXTERNAL_CONTROL
++struct acpi_csd_package {
++ acpi_integer num_entries;
++ acpi_integer revision;
++ acpi_integer domain;
++ acpi_integer coord_type;
++ acpi_integer num_processors;
++ acpi_integer index;
++} __attribute__ ((packed));
++#endif
++
+ struct acpi_power_register {
+ u8 descriptor;
+ u16 length;
+@@ -74,6 +91,12 @@ struct acpi_processor_cx {
+ u32 power;
+ u32 usage;
+ u64 time;
++#ifdef CONFIG_PROCESSOR_EXTERNAL_CONTROL
++ /* Require raw information for external control logic */
++ struct acpi_power_register reg;
++ u32 csd_count;
++ struct acpi_csd_package *domain_info;
++#endif
+ struct acpi_processor_cx_policy promotion;
+ struct acpi_processor_cx_policy demotion;
+ char desc[ACPI_CX_DESC_LEN];
+@@ -304,6 +327,9 @@ static inline void acpi_processor_ppc_ex
+ {
+ return;
+ }
++#ifdef CONFIG_PROCESSOR_EXTERNAL_CONTROL
++int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
++#else
+ static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
+ {
+ static unsigned int printout = 1;
+@@ -316,6 +342,7 @@ static inline int acpi_processor_ppc_has
+ }
+ return 0;
+ }
++#endif /* CONFIG_PROCESSOR_EXTERNAL_CONTROL */
+ #endif /* CONFIG_CPU_FREQ */
+
+ /* in processor_throttling.c */
+@@ -352,4 +379,120 @@ static inline void acpi_thermal_cpufreq_
+ }
+ #endif
+
++/*
++ * Following are interfaces geared to external processor PM control
++ * logic like a VMM
++ */
++/* Events notified to external control logic */
++#define PROCESSOR_PM_INIT 1
++#define PROCESSOR_PM_CHANGE 2
++#define PROCESSOR_HOTPLUG 3
++
++/* Objects for the PM events */
++#define PM_TYPE_IDLE 0
++#define PM_TYPE_PERF 1
++#define PM_TYPE_THR 2
++#define PM_TYPE_MAX 3
++
++/* Processor hotplug events */
++#define HOTPLUG_TYPE_ADD 0
++#define HOTPLUG_TYPE_REMOVE 1
++
++#ifdef CONFIG_PROCESSOR_EXTERNAL_CONTROL
++struct processor_extcntl_ops {
++ /* Transfer processor PM events to external control logic */
++ int (*pm_ops[PM_TYPE_MAX])(struct acpi_processor *pr, int event);
++ /* Notify physical processor status to external control logic */
++ int (*hotplug)(struct acpi_processor *pr, int type);
++};
++extern const struct processor_extcntl_ops *processor_extcntl_ops;
++
++static inline int processor_cntl_external(void)
++{
++ return (processor_extcntl_ops != NULL);
++}
++
++static inline int processor_pm_external(void)
++{
++ return processor_cntl_external() &&
++ (processor_extcntl_ops->pm_ops[PM_TYPE_IDLE] != NULL);
++}
++
++static inline int processor_pmperf_external(void)
++{
++ return processor_cntl_external() &&
++ (processor_extcntl_ops->pm_ops[PM_TYPE_PERF] != NULL);
++}
++
++static inline int processor_pmthr_external(void)
++{
++ return processor_cntl_external() &&
++ (processor_extcntl_ops->pm_ops[PM_TYPE_THR] != NULL);
++}
++
++extern int processor_notify_external(struct acpi_processor *pr,
++ int event, int type);
++extern void processor_extcntl_init(void);
++extern int processor_extcntl_prepare(struct acpi_processor *pr);
++extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
++extern int acpi_processor_get_psd(struct acpi_processor *pr);
++void arch_acpi_processor_init_extcntl(const struct processor_extcntl_ops **);
++#else
++static inline int processor_cntl_external(void) {return 0;}
++static inline int processor_pm_external(void) {return 0;}
++static inline int processor_pmperf_external(void) {return 0;}
++static inline int processor_pmthr_external(void) {return 0;}
++static inline int processor_notify_external(struct acpi_processor *pr,
++ int event, int type)
++{
++ return 0;
++}
++static inline void processor_extcntl_init(void) {}
++static inline int processor_extcntl_prepare(struct acpi_processor *pr)
++{
++ return 0;
++}
++#endif /* CONFIG_PROCESSOR_EXTERNAL_CONTROL */
++
++#ifdef CONFIG_XEN
++static inline void xen_convert_pct_reg(struct xen_pct_register *xpct,
++ struct acpi_pct_register *apct)
++{
++ xpct->descriptor = apct->descriptor;
++ xpct->length = apct->length;
++ xpct->space_id = apct->space_id;
++ xpct->bit_width = apct->bit_width;
++ xpct->bit_offset = apct->bit_offset;
++ xpct->reserved = apct->reserved;
++ xpct->address = apct->address;
++}
++
++static inline void xen_convert_pss_states(struct xen_processor_px *xpss,
++ struct acpi_processor_px *apss, int state_count)
++{
++ int i;
++ for(i=0; i<state_count; i++) {
++ xpss->core_frequency = apss->core_frequency;
++ xpss->power = apss->power;
++ xpss->transition_latency = apss->transition_latency;
++ xpss->bus_master_latency = apss->bus_master_latency;
++ xpss->control = apss->control;
++ xpss->status = apss->status;
++ xpss++;
++ apss++;
++ }
++}
++
++static inline void xen_convert_psd_pack(struct xen_psd_package *xpsd,
++ struct acpi_psd_package *apsd)
++{
++ xpsd->num_entries = apsd->num_entries;
++ xpsd->revision = apsd->revision;
++ xpsd->domain = apsd->domain;
++ xpsd->coord_type = apsd->coord_type;
++ xpsd->num_processors = apsd->num_processors;
++}
++
++#endif /* CONFIG_XEN */
++
+ #endif
+--- a/include/asm-generic/pci.h
++++ b/include/asm-generic/pci.h
+@@ -43,7 +43,9 @@ pcibios_select_root(struct pci_dev *pdev
+ return root;
+ }
+
++#ifndef pcibios_scan_all_fns
+ #define pcibios_scan_all_fns(a, b) 0
++#endif
+
+ #ifndef HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
+ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+--- a/include/asm-generic/pgtable.h
++++ b/include/asm-generic/pgtable.h
+@@ -99,6 +99,10 @@ static inline void ptep_set_wrprotect(st
+ }
+ #endif
+
++#ifndef arch_change_pte_range
++#define arch_change_pte_range(mm, pmd, addr, end, newprot) 0
++#endif
++
+ #ifndef __HAVE_ARCH_PTE_SAME
+ #define pte_same(A,B) (pte_val(A) == pte_val(B))
+ #endif
+--- a/include/linux/aio.h
++++ b/include/linux/aio.h
+@@ -199,6 +199,11 @@ struct kioctx {
+ struct aio_ring_info ring_info;
+
+ struct delayed_work wq;
++#ifdef CONFIG_EPOLL
++ // poll integration
++ wait_queue_head_t poll_wait;
++ struct file *file;
++#endif
+ };
+
+ /* prototypes */
+--- a/include/linux/highmem.h
++++ b/include/linux/highmem.h
+@@ -62,6 +62,7 @@ static inline void *kmap_atomic(struct p
+
+ #endif /* CONFIG_HIGHMEM */
+
++#ifndef __HAVE_ARCH_CLEAR_USER_HIGHPAGE
+ /* when CONFIG_HIGHMEM is not set these will be plain clear/copy_page */
+ static inline void clear_user_highpage(struct page *page, unsigned long vaddr)
+ {
+@@ -69,6 +70,7 @@ static inline void clear_user_highpage(s
+ clear_user_page(addr, vaddr, page);
+ kunmap_atomic(addr, KM_USER0);
+ }
++#endif
+
+ #ifndef __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+ /**
+@@ -115,12 +117,14 @@ alloc_zeroed_user_highpage_movable(struc
+ return __alloc_zeroed_user_highpage(__GFP_MOVABLE, vma, vaddr);
+ }
+
++#ifndef __HAVE_ARCH_CLEAR_HIGHPAGE
+ static inline void clear_highpage(struct page *page)
+ {
+ void *kaddr = kmap_atomic(page, KM_USER0);
+ clear_page(kaddr);
+ kunmap_atomic(kaddr, KM_USER0);
+ }
++#endif
+
+ static inline void zero_user_segments(struct page *page,
+ unsigned start1, unsigned end1,
+@@ -174,6 +178,8 @@ static inline void copy_user_highpage(st
+
+ #endif
+
++#ifndef __HAVE_ARCH_COPY_HIGHPAGE
++
+ static inline void copy_highpage(struct page *to, struct page *from)
+ {
+ char *vfrom, *vto;
+@@ -185,4 +191,6 @@ static inline void copy_highpage(struct
+ kunmap_atomic(vto, KM_USER1);
+ }
+
++#endif
++
+ #endif /* _LINUX_HIGHMEM_H */
+--- a/include/linux/interrupt.h
++++ b/include/linux/interrupt.h
+@@ -218,6 +218,12 @@ static inline int disable_irq_wake(unsig
+ }
+ #endif /* CONFIG_GENERIC_HARDIRQS */
+
++#ifdef CONFIG_HAVE_IRQ_IGNORE_UNHANDLED
++int irq_ignore_unhandled(unsigned int irq);
++#else
++#define irq_ignore_unhandled(irq) 0
++#endif
++
+ #ifndef __ARCH_SET_SOFTIRQ_PENDING
+ #define set_softirq_pending(x) (local_softirq_pending() = (x))
+ #define or_softirq_pending(x) (local_softirq_pending() |= (x))
+--- a/include/linux/kexec.h
++++ b/include/linux/kexec.h
+@@ -46,6 +46,13 @@
+ KEXEC_CORE_NOTE_NAME_BYTES + \
+ KEXEC_CORE_NOTE_DESC_BYTES )
+
++#ifndef KEXEC_ARCH_HAS_PAGE_MACROS
++#define kexec_page_to_pfn(page) page_to_pfn(page)
++#define kexec_pfn_to_page(pfn) pfn_to_page(pfn)
++#define kexec_virt_to_phys(addr) virt_to_phys(addr)
++#define kexec_phys_to_virt(addr) phys_to_virt(addr)
++#endif
++
+ /*
+ * This structure is used to hold the arguments that are used when loading
+ * kernel binaries.
+@@ -108,6 +115,12 @@ struct kimage {
+ extern void machine_kexec(struct kimage *image);
+ extern int machine_kexec_prepare(struct kimage *image);
+ extern void machine_kexec_cleanup(struct kimage *image);
++#ifdef CONFIG_XEN
++extern int xen_machine_kexec_load(struct kimage *image);
++extern void xen_machine_kexec_unload(struct kimage *image);
++extern void xen_machine_kexec_setup_resources(void);
++extern void xen_machine_kexec_register_resources(struct resource *res);
++#endif
+ extern asmlinkage long sys_kexec_load(unsigned long entry,
+ unsigned long nr_segments,
+ struct kexec_segment __user *segments,
+--- a/include/linux/mm.h
++++ b/include/linux/mm.h
+@@ -113,6 +113,9 @@ extern unsigned int kobjsize(const void
+ #define VM_CAN_NONLINEAR 0x08000000 /* Has ->fault & does nonlinear pages */
+ #define VM_MIXEDMAP 0x10000000 /* Can contain "struct page" and pure PFN pages */
+ #define VM_SAO 0x20000000 /* Strong Access Ordering (powerpc) */
++#ifdef CONFIG_XEN
++#define VM_FOREIGN 0x40000000 /* Has pages belonging to another VM */
++#endif
+
+ #ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */
+ #define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS
+@@ -183,6 +186,11 @@ struct vm_operations_struct {
+ */
+ int (*access)(struct vm_area_struct *vma, unsigned long addr,
+ void *buf, int len, int write);
++
++ /* Area-specific function for clearing the PTE at @ptep. Returns the
++ * original value of @ptep. */
++ pte_t (*zap_pte)(struct vm_area_struct *vma,
++ unsigned long addr, pte_t *ptep, int is_fullmm);
+ #ifdef CONFIG_NUMA
+ /*
+ * set_policy() op must add a reference to any non-NULL @new mempolicy
+--- a/include/linux/oprofile.h
++++ b/include/linux/oprofile.h
+@@ -16,6 +16,8 @@
+ #include <linux/types.h>
+ #include <linux/spinlock.h>
+ #include <asm/atomic.h>
++
++#include <xen/interface/xenoprof.h>
+
+ /* Each escaped entry is prefixed by ESCAPE_CODE
+ * then one of the following codes, then the
+@@ -28,7 +30,7 @@
+ #define CPU_SWITCH_CODE 2
+ #define COOKIE_SWITCH_CODE 3
+ #define KERNEL_ENTER_SWITCH_CODE 4
+-#define KERNEL_EXIT_SWITCH_CODE 5
++#define USER_ENTER_SWITCH_CODE 5
+ #define MODULE_LOADED_CODE 6
+ #define CTX_TGID_CODE 7
+ #define TRACE_BEGIN_CODE 8
+@@ -36,6 +38,7 @@
+ #define XEN_ENTER_SWITCH_CODE 10
+ #define SPU_PROFILING_CODE 11
+ #define SPU_CTX_SWITCH_CODE 12
++#define DOMAIN_SWITCH_CODE 13
+
+ struct super_block;
+ struct dentry;
+@@ -47,6 +50,11 @@ struct oprofile_operations {
+ /* create any necessary configuration files in the oprofile fs.
+ * Optional. */
+ int (*create_files)(struct super_block * sb, struct dentry * root);
++ /* setup active domains with Xen */
++ int (*set_active)(int *active_domains, unsigned int adomains);
++ /* setup passive domains with Xen */
++ int (*set_passive)(int *passive_domains, unsigned int pdomains);
++
+ /* Do any necessary interrupt setup. Optional. */
+ int (*setup)(void);
+ /* Do any necessary interrupt shutdown. Optional. */
+@@ -106,6 +114,8 @@ void oprofile_add_pc(unsigned long pc, i
+ /* add a backtrace entry, to be called from the ->backtrace callback */
+ void oprofile_add_trace(unsigned long eip);
+
++/* add a domain switch entry */
++int oprofile_add_domain_switch(int32_t domain_id);
+
+ /**
+ * Create a file of the given name as a child of the given root, with
+--- a/include/linux/page-flags.h
++++ b/include/linux/page-flags.h
+@@ -97,6 +97,9 @@ enum pageflags {
+ #ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
+ PG_uncached, /* Page has been mapped as uncached */
+ #endif
++#ifdef CONFIG_XEN
++ PG_foreign, /* Page is owned by foreign allocator. */
++#endif
+ __NR_PAGEFLAGS,
+
+ /* Filesystems */
+@@ -269,6 +272,19 @@ static inline void SetPageUptodate(struc
+
+ CLEARPAGEFLAG(Uptodate, uptodate)
+
++#define PageForeign(page) test_bit(PG_foreign, &(page)->flags)
++#define SetPageForeign(_page, dtor) do { \
++ set_bit(PG_foreign, &(_page)->flags); \
++ BUG_ON((dtor) == (void (*)(struct page *))0); \
++ (_page)->index = (long)(dtor); \
++} while (0)
++#define ClearPageForeign(page) do { \
++ clear_bit(PG_foreign, &(page)->flags); \
++ (page)->index = 0; \
++} while (0)
++#define PageForeignDestructor(_page) \
++ ((void (*)(struct page *))(_page)->index)(_page)
++
+ extern void cancel_dirty_page(struct page *page, unsigned int account_size);
+
+ int test_clear_page_writeback(struct page *page);
+@@ -339,8 +355,16 @@ PAGEFLAG(MemError, memerror)
+ PAGEFLAG_FALSE(MemError)
+ #endif
+
++#if !defined(CONFIG_XEN)
++# define PAGE_FLAGS_XEN 0
++#elif defined(CONFIG_X86)
++# define PAGE_FLAGS_XEN ((1 << PG_pinned) | (1 << PG_foreign))
++#else
++# define PAGE_FLAGS_XEN (1 << PG_foreign)
++#endif
++
+ #define PAGE_FLAGS (1 << PG_lru | 1 << PG_private | 1 << PG_locked | \
+- 1 << PG_buddy | 1 << PG_writeback | \
++ 1 << PG_buddy | 1 << PG_writeback | PAGE_FLAGS_XEN | \
+ 1 << PG_slab | 1 << PG_swapcache | 1 << PG_active)
+
+ /*
+--- a/include/linux/pci.h
++++ b/include/linux/pci.h
+@@ -211,6 +211,9 @@ struct pci_dev {
+ * directly, use the values stored here. They might be different!
+ */
+ unsigned int irq;
++#ifdef CONFIG_XEN
++ unsigned int irq_old;
++#endif
+ struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
+
+ /* These fields are used by common fixups */
+@@ -767,6 +770,10 @@ static inline void msi_remove_pci_irq_ve
+
+ static inline void pci_restore_msi_state(struct pci_dev *dev)
+ { }
++#ifdef CONFIG_XEN
++#define register_msi_get_owner(func) 0
++#define unregister_msi_get_owner(func) 0
++#endif
+ #else
+ extern int pci_enable_msi(struct pci_dev *dev);
+ extern void pci_msi_shutdown(struct pci_dev *dev);
+@@ -777,6 +784,10 @@ extern void pci_msix_shutdown(struct pci
+ extern void pci_disable_msix(struct pci_dev *dev);
+ extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
+ extern void pci_restore_msi_state(struct pci_dev *dev);
++#ifdef CONFIG_XEN
++extern int register_msi_get_owner(int (*func)(struct pci_dev *dev));
++extern int unregister_msi_get_owner(int (*func)(struct pci_dev *dev));
++#endif
+ #endif
+
+ #ifdef CONFIG_HT_IRQ
+#--- a/include/linux/skbuff.h
+#+++ b/include/linux/skbuff.h
+#@@ -217,6 +217,8 @@ typedef unsigned char *sk_buff_data_t;
+# * @local_df: allow local fragmentation
+# * @cloned: Head may be cloned (check refcnt to be sure)
+# * @nohdr: Payload reference only, must not modify header
+#+ * @proto_data_valid: Protocol data validated since arriving at localhost
+#+ * @proto_csum_blank: Protocol csum must be added before leaving localhost
+# * @pkt_type: Packet class
+# * @fclone: skbuff clone status
+# * @ip_summed: Driver fed us an IP checksum
+#@@ -323,7 +325,11 @@ struct sk_buff {
+# #if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
+# __u8 do_not_encrypt:1;
+# #endif
+#- /* 0/13/14 bit hole */
+#+#ifdef CONFIG_XEN
+#+ __u8 proto_data_valid:1,
+#+ proto_csum_blank:1;
+#+#endif
+#+ /* 10-16 bit hole */
+
+ #ifdef CONFIG_NET_DMA
+# dma_cookie_t dma_cookie;
+--- a/include/linux/vermagic.h
++++ b/include/linux/vermagic.h
+@@ -22,6 +22,11 @@
+ #else
+ #define MODULE_VERMAGIC_MODVERSIONS ""
+ #endif
++#ifdef CONFIG_XEN
++#define MODULE_VERMAGIC_XEN "Xen "
++#else
++#define MODULE_VERMAGIC_XEN
++#endif
+ #ifndef MODULE_ARCH_VERMAGIC
+ #define MODULE_ARCH_VERMAGIC ""
+ #endif
+@@ -30,5 +35,5 @@
+ UTS_RELEASE " " \
+ MODULE_VERMAGIC_SMP MODULE_VERMAGIC_PREEMPT \
+ MODULE_VERMAGIC_MODULE_UNLOAD MODULE_VERMAGIC_MODVERSIONS \
+- MODULE_ARCH_VERMAGIC
++ MODULE_VERMAGIC_XEN MODULE_ARCH_VERMAGIC
+
+--- a/kernel/irq/spurious.c
++++ b/kernel/irq/spurious.c
+@@ -182,7 +182,7 @@ void note_interrupt(unsigned int irq, st
+ */
+ if (time_after(jiffies, desc->last_unhandled + HZ/10))
+ desc->irqs_unhandled = 1;
+- else
++ else if (!irq_ignore_unhandled(irq))
+ desc->irqs_unhandled++;
+ desc->last_unhandled = jiffies;
+ if (unlikely(action_ret != IRQ_NONE))
+--- a/kernel/kexec.c
++++ b/kernel/kexec.c
+@@ -359,13 +359,26 @@ static int kimage_is_destination_range(s
+ return 0;
+ }
+
+-static struct page *kimage_alloc_pages(gfp_t gfp_mask, unsigned int order)
++static struct page *kimage_alloc_pages(gfp_t gfp_mask, unsigned int order, unsigned long limit)
+ {
+ struct page *pages;
+
+ pages = alloc_pages(gfp_mask, order);
+ if (pages) {
+ unsigned int count, i;
++#ifdef CONFIG_XEN
++ int address_bits;
++
++ if (limit == ~0UL)
++ address_bits = BITS_PER_LONG;
++ else
++ address_bits = long_log2(limit);
++
++ if (xen_limit_pages_to_max_mfn(pages, order, address_bits) < 0) {
++ __free_pages(pages, order);
++ return NULL;
++ }
++#endif
+ pages->mapping = NULL;
+ set_page_private(pages, order);
+ count = 1 << order;
+@@ -384,6 +397,9 @@ static void kimage_free_pages(struct pag
+ count = 1 << order;
+ for (i = 0; i < count; i++)
+ ClearPageReserved(page + i);
++#ifdef CONFIG_XEN
++ xen_destroy_contiguous_region((unsigned long)page_address(page), order);
++#endif
+ __free_pages(page, order);
+ }
+
+@@ -429,10 +445,10 @@ static struct page *kimage_alloc_normal_
+ do {
+ unsigned long pfn, epfn, addr, eaddr;
+
+- pages = kimage_alloc_pages(GFP_KERNEL, order);
++ pages = kimage_alloc_pages(GFP_KERNEL, order, KEXEC_CONTROL_MEMORY_LIMIT);
+ if (!pages)
+ break;
+- pfn = page_to_pfn(pages);
++ pfn = kexec_page_to_pfn(pages);
+ epfn = pfn + count;
+ addr = pfn << PAGE_SHIFT;
+ eaddr = epfn << PAGE_SHIFT;
+@@ -466,6 +482,7 @@ static struct page *kimage_alloc_normal_
+ return pages;
+ }
+
++#ifndef CONFIG_XEN
+ static struct page *kimage_alloc_crash_control_pages(struct kimage *image,
+ unsigned int order)
+ {
+@@ -519,7 +536,7 @@ static struct page *kimage_alloc_crash_c
+ }
+ /* If I don't overlap any segments I have found my hole! */
+ if (i == image->nr_segments) {
+- pages = pfn_to_page(hole_start >> PAGE_SHIFT);
++ pages = kexec_pfn_to_page(hole_start >> PAGE_SHIFT);
+ break;
+ }
+ }
+@@ -546,6 +563,13 @@ struct page *kimage_alloc_control_pages(
+
+ return pages;
+ }
++#else /* !CONFIG_XEN */
++struct page *kimage_alloc_control_pages(struct kimage *image,
++ unsigned int order)
++{
++ return kimage_alloc_normal_control_pages(image, order);
++}
++#endif
+
+ static int kimage_add_entry(struct kimage *image, kimage_entry_t entry)
+ {
+@@ -561,7 +585,7 @@ static int kimage_add_entry(struct kimag
+ return -ENOMEM;
+
+ ind_page = page_address(page);
+- *image->entry = virt_to_phys(ind_page) | IND_INDIRECTION;
++ *image->entry = kexec_virt_to_phys(ind_page) | IND_INDIRECTION;
+ image->entry = ind_page;
+ image->last_entry = ind_page +
+ ((PAGE_SIZE/sizeof(kimage_entry_t)) - 1);
+@@ -620,13 +644,13 @@ static void kimage_terminate(struct kima
+ #define for_each_kimage_entry(image, ptr, entry) \
+ for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); \
+ ptr = (entry & IND_INDIRECTION)? \
+- phys_to_virt((entry & PAGE_MASK)): ptr +1)
++ kexec_phys_to_virt((entry & PAGE_MASK)): ptr +1)
+
+ static void kimage_free_entry(kimage_entry_t entry)
+ {
+ struct page *page;
+
+- page = pfn_to_page(entry >> PAGE_SHIFT);
++ page = kexec_pfn_to_page(entry >> PAGE_SHIFT);
+ kimage_free_pages(page);
+ }
+
+@@ -638,6 +662,10 @@ static void kimage_free(struct kimage *i
+ if (!image)
+ return;
+
++#ifdef CONFIG_XEN
++ xen_machine_kexec_unload(image);
++#endif
++
+ kimage_free_extra_pages(image);
+ for_each_kimage_entry(image, ptr, entry) {
+ if (entry & IND_INDIRECTION) {
+@@ -713,7 +741,7 @@ static struct page *kimage_alloc_page(st
+ * have a match.
+ */
+ list_for_each_entry(page, &image->dest_pages, lru) {
+- addr = page_to_pfn(page) << PAGE_SHIFT;
++ addr = kexec_page_to_pfn(page) << PAGE_SHIFT;
+ if (addr == destination) {
+ list_del(&page->lru);
+ return page;
+@@ -724,16 +752,16 @@ static struct page *kimage_alloc_page(st
+ kimage_entry_t *old;
+
+ /* Allocate a page, if we run out of memory give up */
+- page = kimage_alloc_pages(gfp_mask, 0);
++ page = kimage_alloc_pages(gfp_mask, 0, KEXEC_SOURCE_MEMORY_LIMIT);
+ if (!page)
+ return NULL;
+ /* If the page cannot be used file it away */
+- if (page_to_pfn(page) >
++ if (kexec_page_to_pfn(page) >
+ (KEXEC_SOURCE_MEMORY_LIMIT >> PAGE_SHIFT)) {
+ list_add(&page->lru, &image->unuseable_pages);
+ continue;
+ }
+- addr = page_to_pfn(page) << PAGE_SHIFT;
++ addr = kexec_page_to_pfn(page) << PAGE_SHIFT;
+
+ /* If it is the destination page we want use it */
+ if (addr == destination)
+@@ -756,7 +784,7 @@ static struct page *kimage_alloc_page(st
+ struct page *old_page;
+
+ old_addr = *old & PAGE_MASK;
+- old_page = pfn_to_page(old_addr >> PAGE_SHIFT);
++ old_page = kexec_pfn_to_page(old_addr >> PAGE_SHIFT);
+ copy_highpage(page, old_page);
+ *old = addr | (*old & ~PAGE_MASK);
+
+@@ -812,7 +840,7 @@ static int kimage_load_normal_segment(st
+ result = -ENOMEM;
+ goto out;
+ }
+- result = kimage_add_page(image, page_to_pfn(page)
++ result = kimage_add_page(image, kexec_page_to_pfn(page)
+ << PAGE_SHIFT);
+ if (result < 0)
+ goto out;
+@@ -844,6 +872,7 @@ out:
+ return result;
+ }
+
++#ifndef CONFIG_XEN
+ static int kimage_load_crash_segment(struct kimage *image,
+ struct kexec_segment *segment)
+ {
+@@ -866,7 +895,7 @@ static int kimage_load_crash_segment(str
+ char *ptr;
+ size_t uchunk, mchunk;
+
+- page = pfn_to_page(maddr >> PAGE_SHIFT);
++ page = kexec_pfn_to_page(maddr >> PAGE_SHIFT);
+ if (!page) {
+ result = -ENOMEM;
+ goto out;
+@@ -915,6 +944,13 @@ static int kimage_load_segment(struct ki
+
+ return result;
+ }
++#else /* CONFIG_XEN */
++static int kimage_load_segment(struct kimage *image,
++ struct kexec_segment *segment)
++{
++ return kimage_load_normal_segment(image, segment);
++}
++#endif
+
+ /*
+ * Exec Kernel system call: for obvious reasons only root may call it.
+@@ -1019,6 +1055,13 @@ asmlinkage long sys_kexec_load(unsigned
+ }
+ kimage_terminate(image);
+ }
++#ifdef CONFIG_XEN
++ if (image) {
++ result = xen_machine_kexec_load(image);
++ if (result)
++ goto out;
++ }
++#endif
+ /* Install the new kernel, and Uninstall the old */
+ image = xchg(dest_image, image);
+
+--- a/kernel/sysctl.c
++++ b/kernel/sysctl.c
+@@ -751,7 +751,7 @@ static struct ctl_table kern_table[] = {
+ .proc_handler = &proc_dointvec,
+ },
+ #endif
+-#if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
++#if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) && !defined(CONFIG_ACPI_PV_SLEEP)
+ {
+ .procname = "acpi_video_flags",
+ .data = &acpi_realmode_flags,
+--- a/mm/memory.c
++++ b/mm/memory.c
+@@ -446,6 +446,12 @@ struct page *vm_normal_page(struct vm_ar
+ {
+ unsigned long pfn;
+
++#if defined(CONFIG_XEN) && defined(CONFIG_X86)
++ /* XEN: Covers user-space grant mappings (even of local pages). */
++ if (unlikely(vma->vm_flags & VM_FOREIGN))
++ return NULL;
++#endif
++
+ if (HAVE_PTE_SPECIAL) {
+ if (likely(!pte_special(pte))) {
+ VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
+@@ -474,7 +480,14 @@ struct page *vm_normal_page(struct vm_ar
+ }
+ }
+
++#ifndef CONFIG_XEN
+ VM_BUG_ON(!pfn_valid(pfn));
++#else
++ if (unlikely(!pfn_valid(pfn))) {
++ VM_BUG_ON(!(vma->vm_flags & VM_RESERVED));
++ return NULL;
++ }
++#endif
+
+ /*
+ * NOTE! We still have PageReserved() pages in the page tables.
+@@ -745,8 +758,12 @@ static unsigned long zap_pte_range(struc
+ page->index > details->last_index))
+ continue;
+ }
+- ptent = ptep_get_and_clear_full(mm, addr, pte,
+- tlb->fullmm);
++ if (unlikely(vma->vm_ops && vma->vm_ops->zap_pte))
++ ptent = vma->vm_ops->zap_pte(vma, addr, pte,
++ tlb->fullmm);
++ else
++ ptent = ptep_get_and_clear_full(mm, addr, pte,
++ tlb->fullmm);
+ tlb_remove_tlb_entry(tlb, pte, addr);
+ if (unlikely(!page))
+ continue;
+@@ -996,6 +1013,7 @@ unsigned long zap_page_range(struct vm_a
+ tlb_finish_mmu(tlb, address, end);
+ return end;
+ }
++EXPORT_SYMBOL(zap_page_range);
+
+ /**
+ * zap_vma_ptes - remove ptes mapping the vma
+@@ -1193,6 +1211,26 @@ int get_user_pages(struct task_struct *t
+ continue;
+ }
+
++#ifdef CONFIG_XEN
++ if (vma && (vma->vm_flags & VM_FOREIGN)) {
++ struct page **map = vma->vm_private_data;
++ int offset = (start - vma->vm_start) >> PAGE_SHIFT;
++ if (map[offset] != NULL) {
++ if (pages) {
++ struct page *page = map[offset];
++
++ pages[i] = page;
++ get_page(page);
++ }
++ if (vmas)
++ vmas[i] = vma;
++ i++;
++ start += PAGE_SIZE;
++ len--;
++ continue;
++ }
++ }
++#endif
+ if (!vma || (vma->vm_flags & (VM_IO | VM_PFNMAP))
+ || !(vm_flags & vma->vm_flags))
+ return i ? : -EFAULT;
+--- a/mm/mprotect.c
++++ b/mm/mprotect.c
+@@ -92,6 +92,8 @@ static inline void change_pmd_range(stru
+ next = pmd_addr_end(addr, end);
+ if (pmd_none_or_clear_bad(pmd))
+ continue;
++ if (arch_change_pte_range(mm, pmd, addr, next, newprot))
++ continue;
+ change_pte_range(mm, pmd, addr, next, newprot, dirty_accountable);
+ } while (pmd++, addr = next, addr != end);
+ }
+--- a/mm/page_alloc.c
++++ b/mm/page_alloc.c
+@@ -533,7 +533,14 @@ static void __free_pages_ok(struct page
+ unsigned long flags;
+ int i;
+ int reserved = 0;
+
++#ifdef CONFIG_XEN
++ if (PageForeign(page)) {
++ PageForeignDestructor(page);
++ return;
++ }
++#endif
++
+ for (i = 0 ; i < (1 << order) ; ++i)
+ reserved += free_pages_check(page + i);
+ if (reserved)
+@@ -995,6 +1001,12 @@ static void free_hot_cold_page(struct pa
+ struct per_cpu_pages *pcp;
+ unsigned long flags;
+
++#ifdef CONFIG_XEN
++ if (PageForeign(page)) {
++ PageForeignDestructor(page);
++ return;
++ }
++#endif
+ if (PageAnon(page))
+ page->mapping = NULL;
+ if (free_pages_check(page))
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -131,6 +131,12 @@
+
+ #include "net-sysfs.h"
+
++#ifdef CONFIG_XEN
++#include <net/ip.h>
++#include <linux/tcp.h>
++#include <linux/udp.h>
++#endif
++
+ /*
+ * The list of packet types we will receive (as opposed to discard)
+ * and the routines to invoke.
+@@ -1734,6 +1740,42 @@ static struct netdev_queue *dev_pick_tx(
+ return netdev_get_tx_queue(dev, queue_index);
+ }
+
++#ifdef CONFIG_XEN
++inline int skb_checksum_setup(struct sk_buff *skb)
++{
++ if (skb->proto_csum_blank) {
++ if (skb->protocol != htons(ETH_P_IP))
++ goto out;
++ skb->h.raw = (unsigned char *)skb->nh.iph + 4*skb->nh.iph->ihl;
++ if (skb->h.raw >= skb->tail)
++ goto out;
++ switch (skb->nh.iph->protocol) {
++ case IPPROTO_TCP:
++ skb->csum = offsetof(struct tcphdr, check);
++ break;
++ case IPPROTO_UDP:
++ skb->csum = offsetof(struct udphdr, check);
++ break;
++ default:
++ if (net_ratelimit())
++ printk(KERN_ERR "Attempting to checksum a non-"
++ "TCP/UDP packet, dropping a protocol"
++ " %d packet", skb->nh.iph->protocol);
++ goto out;
++ }
++ if ((skb->h.raw + skb->csum + 2) > skb->tail)
++ goto out;
++ skb->ip_summed = CHECKSUM_HW;
++ skb->proto_csum_blank = 0;
++ }
++ return 0;
++out:
++ return -EPROTO;
++}
++#else
++inline int skb_checksum_setup(struct sk_buff *skb) { return 0; }
++#endif
++
+ /**
+ * dev_queue_xmit - transmit a buffer
+ * @skb: buffer to transmit
+@@ -1766,6 +1808,12 @@ int dev_queue_xmit(struct sk_buff *skb)
+ struct Qdisc *q;
+ int rc = -ENOMEM;
+
++ /* If a checksum-deferred packet is forwarded to a device that needs a
++ * checksum, correct the pointers and force checksumming.
++ */
++ if (skb_checksum_setup(skb))
++ goto out_kfree_skb;
++
+ /* GSO will handle the following emulations directly. */
+ if (netif_needs_gso(dev, skb))
+ goto gso;
+@@ -2271,6 +2319,19 @@ int netif_receive_skb(struct sk_buff *sk
+ }
+ #endif
+
++#ifdef CONFIG_XEN
++ switch (skb->ip_summed) {
++ case CHECKSUM_UNNECESSARY:
++ skb->proto_data_valid = 1;
++ break;
++ case CHECKSUM_HW:
++ /* XXX Implement me. */
++ default:
++ skb->proto_data_valid = 0;
++ break;
++ }
++#endif
++
+ list_for_each_entry_rcu(ptype, &ptype_all, list) {
+ if (ptype->dev == null_or_orig || ptype->dev == skb->dev ||
+
+@@ -4925,6 +4986,7 @@ EXPORT_SYMBOL(unregister_netdevice_notif
+ EXPORT_SYMBOL(net_enable_timestamp);
+ EXPORT_SYMBOL(net_disable_timestamp);
+ EXPORT_SYMBOL(dev_get_flags);
++EXPORT_SYMBOL(skb_checksum_setup);
+
+ #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ EXPORT_SYMBOL(br_handle_frame_hook);
+--- a/net/core/skbuff.c
++++ b/net/core/skbuff.c
+@@ -559,6 +559,10 @@ static struct sk_buff *__skb_clone(struc
+ n->hdr_len = skb->nohdr ? skb_headroom(skb) : skb->hdr_len;
+ n->cloned = 1;
+ n->nohdr = 0;
++#ifdef CONFIG_XEN
++ C(proto_data_valid);
++ C(proto_csum_blank);
++#endif
+ n->destructor = NULL;
+ C(iif);
+ C(tail);
+--- a/net/ipv4/netfilter/nf_nat_proto_tcp.c
++++ b/net/ipv4/netfilter/nf_nat_proto_tcp.c
+@@ -75,6 +75,9 @@ tcp_manip_pkt(struct sk_buff *skb,
+ if (hdrsize < sizeof(*hdr))
+ return true;
+
++ if (skb_checksum_setup(skb))
++ return false;
++
+ inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1);
+ inet_proto_csum_replace2(&hdr->check, skb, oldport, newport, 0);
+ return true;
+--- a/net/ipv4/netfilter/nf_nat_proto_udp.c
++++ b/net/ipv4/netfilter/nf_nat_proto_udp.c
+@@ -60,6 +60,10 @@ udp_manip_pkt(struct sk_buff *skb,
+ newport = tuple->dst.u.udp.port;
+ portptr = &hdr->dest;
+ }
++
++ if (skb_checksum_setup(skb))
++ return false;
++
+ if (hdr->check || skb->ip_summed == CHECKSUM_PARTIAL) {
+ inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1);
+ inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport,
+--- a/net/ipv4/xfrm4_output.c
++++ b/net/ipv4/xfrm4_output.c
+@@ -81,7 +81,7 @@ static int xfrm4_output_finish(struct sk
+ #endif
+
+ skb->protocol = htons(ETH_P_IP);
+- return xfrm_output(skb);
++ return skb_checksum_setup(skb) ?: xfrm_output(skb);
+ }
+
+ int xfrm4_output(struct sk_buff *skb)
+--- a/scripts/Makefile.build
++++ b/scripts/Makefile.build
+@@ -73,6 +73,20 @@ ifndef obj
+ $(warning kbuild: Makefile.build is included improperly)
+ endif
+
++ifeq ($(CONFIG_XEN),y)
++$(objtree)/scripts/Makefile.xen: $(srctree)/scripts/Makefile.xen.awk $(srctree)/scripts/Makefile.build
++ @echo ' Updating $@'
++ $(if $(shell echo a | $(AWK) '{ print gensub(/a/, "AA", "g"); }'),\
++ ,$(error 'Your awk program does not define gensub. Use gawk or another awk with gensub'))
++ @$(AWK) -f $< $(filter-out $<,$^) >$@
++
++xen-src-single-used-m := $(patsubst $(srctree)/%,%,$(wildcard $(addprefix $(srctree)/,$(single-used-m:.o=-xen.c))))
++xen-single-used-m := $(xen-src-single-used-m:-xen.c=.o)
++single-used-m := $(filter-out $(xen-single-used-m),$(single-used-m))
++
++-include $(objtree)/scripts/Makefile.xen
++endif
++
+ # ===========================================================================
+
+ ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),)
+--- a/scripts/Makefile.lib
++++ b/scripts/Makefile.lib
+@@ -17,6 +17,12 @@ obj-m := $(filter-out $(obj-y),$(obj-m))
+
+ lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
+
++# Remove objects forcibly disabled
++
++obj-y := $(filter-out $(disabled-obj-y),$(obj-y))
++obj-m := $(filter-out $(disabled-obj-y),$(obj-m))
++lib-y := $(filter-out $(disabled-obj-y),$(lib-y))
++
+
+ # Handle objects in subdirs
+ # ---------------------------------------------------------------------------
--- /dev/null
+Subject: xen3 arch-x86
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-12-01/arch/x86/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/Makefile 2008-12-01 11:11:08.000000000 +0100
+@@ -115,6 +115,10 @@ mcore-y := arch/x86/mach-default/
+ mflags-$(CONFIG_X86_VOYAGER) := -Iinclude/asm-x86/mach-voyager
+ mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
+
++# Xen subarch support
++mflags-$(CONFIG_X86_XEN) := -Iinclude/asm-x86/mach-xen
++mcore-$(CONFIG_X86_XEN) := arch/x86/mach-xen/
++
+ # generic subarchitecture
+ mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic
+ fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
+@@ -183,9 +187,26 @@ drivers-$(CONFIG_KDB) += arch/x86/kdb/
+
+ boot := arch/x86/boot
+
+-PHONY += zImage bzImage compressed zlilo bzlilo \
++PHONY += zImage bzImage vmlinuz compressed zlilo bzlilo \
+ zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
+
++ifdef CONFIG_XEN
++CPPFLAGS := -D__XEN_INTERFACE_VERSION__=$(CONFIG_XEN_INTERFACE_VERSION) \
++ -Iinclude$(if $(KBUILD_SRC),2)/asm/mach-xen $(CPPFLAGS)
++
++ifdef CONFIG_X86_64
++LDFLAGS_vmlinux := -e startup_64
++endif
++
++# Default kernel to build
++all: vmlinuz
++
++# KBUILD_IMAGE specifies the target image being built
++KBUILD_IMAGE := $(boot)/vmlinuz
++
++vmlinuz: vmlinux
++ $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
++else
+ # Default kernel to build
+ all: bzImage
+
+@@ -208,6 +229,7 @@ zdisk bzdisk: vmlinux
+
+ fdimage fdimage144 fdimage288 isoimage: vmlinux
+ $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
++endif
+
+ install:
+ $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
+Index: head-2008-12-01/arch/x86/boot/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/boot/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/boot/Makefile 2008-12-01 11:11:08.000000000 +0100
+@@ -25,7 +25,7 @@ SVGA_MODE := -DSVGA_MODE=NORMAL_VGA
+
+ #RAMDISK := -DRAMDISK=512
+
+-targets := vmlinux.bin setup.bin setup.elf zImage bzImage
++targets := vmlinux.bin setup.bin setup.elf zImage bzImage vmlinuz vmlinux-stripped
+ subdir- := compressed
+
+ setup-y += a20.o cmdline.o copy.o cpu.o cpucheck.o edd.o
+@@ -190,5 +190,13 @@ zlilo: $(BOOTIMAGE)
+ cp System.map $(INSTALL_PATH)/
+ if [ -x /sbin/lilo ]; then /sbin/lilo; else /etc/lilo/install; fi
+
++$(obj)/vmlinuz: $(obj)/vmlinux-stripped FORCE
++ $(call if_changed,gzip)
++ @echo 'Kernel: $@ is ready' ' (#'`cat .version`')'
++
++$(obj)/vmlinux-stripped: OBJCOPYFLAGS := -g --strip-unneeded
++$(obj)/vmlinux-stripped: vmlinux FORCE
++ $(call if_changed,objcopy)
++
+ install:
+ sh $(srctree)/$(src)/install.sh $(KERNELRELEASE) $(BOOTIMAGE) System.map "$(INSTALL_PATH)"
+Index: head-2008-12-01/arch/x86/kernel/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/Makefile 2008-12-01 11:14:33.000000000 +0100
+@@ -99,10 +99,13 @@ scx200-y += scx200_32.o
+
+ obj-$(CONFIG_OLPC) += olpc.o
+
++obj-$(CONFIG_X86_XEN) += fixup.o
++
+ ###
+ # 64 bit specific files
+ ifeq ($(CONFIG_X86_64),y)
+ obj-y += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o
++ obj-$(CONFIG_X86_XEN_GENAPIC) += genapic_xen_64.o
+ obj-y += bios_uv.o
+ obj-$(CONFIG_X86_PM_TIMER) += pmtimer_64.o
+ obj-$(CONFIG_AUDIT) += audit_64.o
+@@ -116,4 +119,10 @@ ifeq ($(CONFIG_X86_64),y)
+ obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o
+
+ obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
++
++ time_64-$(CONFIG_XEN) += time_32.o
++ pci-dma_64-$(CONFIG_XEN) += pci-dma_32.o
+ endif
++
++disabled-obj-$(CONFIG_XEN) := i8259_$(BITS).o reboot.o smpboot_$(BITS).o
++%/head_$(BITS).o %/head_$(BITS).s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
+Index: head-2008-12-01/arch/x86/kernel/acpi/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/acpi/Makefile 2008-12-01 11:11:08.000000000 +0100
+@@ -5,6 +5,9 @@ obj-$(CONFIG_ACPI_SLEEP) += sleep.o wake
+
+ ifneq ($(CONFIG_ACPI_PROCESSOR),)
+ obj-y += cstate.o processor.o
++ifneq ($(CONFIG_PROCESSOR_EXTERNAL_CONTROL),)
++obj-$(CONFIG_XEN) += processor_extcntl_xen.o
++endif
+ endif
+
+ $(obj)/wakeup_rm.o: $(obj)/realmode/wakeup.bin
+@@ -12,3 +15,4 @@ $(obj)/wakeup_rm.o: $(obj)/realmode/w
+ $(obj)/realmode/wakeup.bin: FORCE
+ $(Q)$(MAKE) $(build)=$(obj)/realmode
+
++disabled-obj-$(CONFIG_XEN) := cstate.o wakeup_$(BITS).o
+Index: head-2008-12-01/arch/x86/kernel/acpi/boot.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/boot.c 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/acpi/boot.c 2008-12-01 11:11:08.000000000 +0100
+@@ -130,8 +130,10 @@ char *__init __acpi_map_table(unsigned l
+ if (!phys || !size)
+ return NULL;
+
++#ifndef CONFIG_XEN
+ if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
+ return __va(phys);
++#endif
+
+ offset = phys & (PAGE_SIZE - 1);
+ mapped_size = PAGE_SIZE - offset;
+Index: head-2008-12-01/arch/x86/kernel/acpi/processor.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/processor.c 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/acpi/processor.c 2008-12-01 11:11:08.000000000 +0100
+@@ -75,7 +75,18 @@ static void init_intel_pdc(struct acpi_p
+ /* Initialize _PDC data based on the CPU vendor */
+ void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
+ {
++#ifdef CONFIG_XEN
++ /*
++ * As a work-around, just use cpu0's cpuinfo for all processors.
++ * Further work is required to expose xen hypervisor interface of
++ * getting physical cpuinfo to dom0 kernel and then
++ * arch_acpi_processor_init_pdc can set _PDC parameters according
++ * to Xen's phys information.
++ */
++ struct cpuinfo_x86 *c = &boot_cpu_data;
++#else
+ struct cpuinfo_x86 *c = &cpu_data(pr->id);
++#endif
+
+ pr->pdc = NULL;
+ if (c->x86_vendor == X86_VENDOR_INTEL)
+Index: head-2008-12-01/arch/x86/kernel/cpu/mtrr/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/mtrr/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/mtrr/Makefile 2008-12-01 11:11:08.000000000 +0100
+@@ -1,3 +1,4 @@
+ obj-y := main.o if.o generic.o state.o
+ obj-$(CONFIG_X86_32) += amd.o cyrix.o centaur.o
+
++obj-$(CONFIG_XEN) := main.o if.o
+Index: head-2008-12-01/arch/x86/kernel/crash.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/crash.c 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/crash.c 2008-12-01 11:11:08.000000000 +0100
+@@ -32,6 +32,7 @@
+ /* This keeps a track of which one is crashing cpu. */
+ static int crashing_cpu;
+
++#ifndef CONFIG_XEN
+ #if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
+ static atomic_t waiting_for_crash_ipi;
+
+@@ -190,6 +191,7 @@ static void halt_current_cpu(struct pt_r
+ /* There are no cpus to shootdown */
+ }
+ #endif
++#endif /* CONFIG_XEN */
+
+ void native_machine_crash_shutdown(struct pt_regs *regs)
+ {
+@@ -206,11 +208,13 @@ void native_machine_crash_shutdown(struc
+
+ /* Make a note of crashing cpu. Will be used in NMI callback.*/
+ crashing_cpu = safe_smp_processor_id();
++#ifndef CONFIG_XEN
+ nmi_shootdown_cpus();
+ lapic_shutdown();
+ #if defined(CONFIG_X86_IO_APIC)
+ disable_IO_APIC();
+ #endif
++#endif /* CONFIG_XEN */
+ #ifdef CONFIG_HPET_TIMER
+ hpet_disable();
+ #endif
+Index: head-2008-12-01/arch/x86/lib/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/lib/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/lib/Makefile 2008-12-01 11:11:08.000000000 +0100
+@@ -25,3 +25,5 @@ else
+ lib-y += memmove_64.o memset_64.o
+ lib-y += copy_user_64.o rwlock_64.o copy_user_nocache_64.o
+ endif
++
++lib-$(CONFIG_XEN_SCRUB_PAGES) += scrub.o
+Index: head-2008-12-01/arch/x86/mm/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/Makefile 2008-12-01 11:11:08.000000000 +0100
+@@ -21,4 +21,6 @@ obj-$(CONFIG_K8_NUMA) += k8topology_64.
+ endif
+ obj-$(CONFIG_ACPI_NUMA) += srat_$(BITS).o
+
++obj-$(CONFIG_XEN) += hypervisor.o
++
+ obj-$(CONFIG_MEMTEST) += memtest.o
+Index: head-2008-12-01/arch/x86/oprofile/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/oprofile/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/oprofile/Makefile 2008-12-01 11:11:08.000000000 +0100
+@@ -6,7 +6,14 @@ DRIVER_OBJS = $(addprefix ../../../drive
+ oprofilefs.o oprofile_stats.o \
+ timer_int.o )
+
++ifdef CONFIG_XEN
++XENOPROF_COMMON_OBJS = $(addprefix ../../../drivers/xen/xenoprof/, \
++ xenoprofile.o)
++oprofile-y := $(DRIVER_OBJS) \
++ $(XENOPROF_COMMON_OBJS) xenoprof.o
++else
+ oprofile-y := $(DRIVER_OBJS) init.o backtrace.o
+ oprofile-$(CONFIG_X86_LOCAL_APIC) += nmi_int.o op_model_athlon.o \
+ op_model_ppro.o op_model_p4.o
+ oprofile-$(CONFIG_X86_IO_APIC) += nmi_timer_int.o
++endif
+Index: head-2008-12-01/arch/x86/pci/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/pci/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/pci/Makefile 2008-12-01 11:11:08.000000000 +0100
+@@ -4,6 +4,9 @@ obj-$(CONFIG_PCI_BIOS) += pcbios.o
+ obj-$(CONFIG_PCI_MMCONFIG) += mmconfig_$(BITS).o direct.o mmconfig-shared.o
+ obj-$(CONFIG_PCI_DIRECT) += direct.o
+ obj-$(CONFIG_PCI_OLPC) += olpc.o
++# pcifront should be after mmconfig.o and direct.o as it should only
++# take over if direct access to the PCI bus is unavailable
++obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += pcifront.o
+
+ obj-y += fixup.o
+ obj-$(CONFIG_ACPI) += acpi.o
+Index: head-2008-12-01/include/asm-x86/acpi.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/acpi.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/acpi.h 2008-12-01 11:11:08.000000000 +0100
+@@ -30,6 +30,10 @@
+ #include <asm/mmu.h>
+ #include <asm/mpspec.h>
+
++#ifdef CONFIG_XEN
++#include <xen/interface/platform.h>
++#endif
++
+ #define COMPILER_DEPENDENT_INT64 long long
+ #define COMPILER_DEPENDENT_UINT64 unsigned long long
+
+@@ -124,6 +128,27 @@ extern unsigned long acpi_wakeup_address
+ /* early initialization routine */
+ extern void acpi_reserve_bootmem(void);
+
++#ifdef CONFIG_XEN
++static inline int acpi_notify_hypervisor_state(u8 sleep_state,
++ u32 pm1a_cnt_val,
++ u32 pm1b_cnt_val)
++{
++ struct xen_platform_op op = {
++ .cmd = XENPF_enter_acpi_sleep,
++ .interface_version = XENPF_INTERFACE_VERSION,
++ .u = {
++ .enter_acpi_sleep = {
++ .pm1a_cnt_val = pm1a_cnt_val,
++ .pm1b_cnt_val = pm1b_cnt_val,
++ .sleep_state = sleep_state,
++ },
++ },
++ };
++
++ return HYPERVISOR_platform_op(&op);
++}
++#endif /* CONFIG_XEN */
++
+ /*
+ * Check if the CPU can handle C2 and deeper
+ */
+@@ -156,7 +181,9 @@ static inline void disable_acpi(void) {
+
+ #endif /* !CONFIG_ACPI */
+
++#ifndef CONFIG_XEN
+ #define ARCH_HAS_POWER_INIT 1
++#endif
+
+ struct bootnode;
+
+Index: head-2008-12-01/include/asm-x86/apic.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/apic.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/apic.h 2008-12-01 11:11:08.000000000 +0100
+@@ -12,7 +12,9 @@
+ #include <asm/cpufeature.h>
+ #include <asm/msr.h>
+
++#ifndef CONFIG_XEN
+ #define ARCH_APICTIMER_STOPS_ON_C3 1
++#endif
+
+ /*
+ * Debugging macros
+Index: head-2008-12-01/include/asm-x86/kexec.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/kexec.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/kexec.h 2008-12-01 11:11:08.000000000 +0100
+@@ -170,6 +170,19 @@ relocate_kernel(unsigned long indirectio
+ unsigned long start_address) ATTRIB_NORET;
+ #endif
+
++/* Under Xen we need to work with machine addresses. These macros give the
++ * machine address of a certain page to the generic kexec code instead of
++ * the pseudo physical address which would be given by the default macros.
++ */
++
++#ifdef CONFIG_XEN
++#define KEXEC_ARCH_HAS_PAGE_MACROS
++#define kexec_page_to_pfn(page) pfn_to_mfn(page_to_pfn(page))
++#define kexec_pfn_to_page(pfn) pfn_to_page(mfn_to_pfn(pfn))
++#define kexec_virt_to_phys(addr) virt_to_machine(addr)
++#define kexec_phys_to_virt(addr) phys_to_virt(machine_to_phys(addr))
++#endif
++
+ #endif /* __ASSEMBLY__ */
+
+ #endif /* _KEXEC_H */
--- /dev/null
+Subject: xen3 arch-i386
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-11-25/arch/x86/kernel/asm-offsets_32.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/asm-offsets_32.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/asm-offsets_32.c 2008-11-25 12:35:53.000000000 +0100
+@@ -91,9 +91,14 @@ void foo(void)
+ OFFSET(pbe_orig_address, pbe, orig_address);
+ OFFSET(pbe_next, pbe, next);
+
++#ifndef CONFIG_X86_NO_TSS
+ /* Offset from the sysenter stack to tss.sp0 */
+- DEFINE(TSS_sysenter_sp0, offsetof(struct tss_struct, x86_tss.sp0) -
++ DEFINE(SYSENTER_stack_sp0, offsetof(struct tss_struct, x86_tss.sp0) -
+ sizeof(struct tss_struct));
++#else
++ /* sysenter stack points directly to sp0 */
++ DEFINE(SYSENTER_stack_sp0, 0);
++#endif
+
+ DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
+ DEFINE(PAGE_SHIFT_asm, PAGE_SHIFT);
+Index: head-2008-11-25/arch/x86/kernel/entry_32.S
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/entry_32.S 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/entry_32.S 2008-11-25 12:35:53.000000000 +0100
+@@ -293,7 +293,7 @@ ENTRY(ia32_sysenter_target)
+ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA esp, 0
+ CFI_REGISTER esp, ebp
+- movl TSS_sysenter_sp0(%esp),%esp
++ movl SYSENTER_stack_sp0(%esp),%esp
+ sysenter_past_esp:
+ /*
+ * Interrupts are disabled here, but we can't trace it until
+@@ -782,7 +782,7 @@ END(device_not_available)
+ * that sets up the real kernel stack. Check here, since we can't
+ * allow the wrong stack to be used.
+ *
+- * "TSS_sysenter_sp0+12" is because the NMI/debug handler will have
++ * "SYSENTER_stack_sp0+12" is because the NMI/debug handler will have
+ * already pushed 3 words if it hits on the sysenter instruction:
+ * eflags, cs and eip.
+ *
+@@ -794,7 +794,7 @@ END(device_not_available)
+ cmpw $__KERNEL_CS,4(%esp); \
+ jne ok; \
+ label: \
+- movl TSS_sysenter_sp0+offset(%esp),%esp; \
++ movl SYSENTER_stack_sp0+offset(%esp),%esp; \
+ CFI_DEF_CFA esp, 0; \
+ CFI_UNDEFINED eip; \
+ pushfl; \
+Index: head-2008-11-25/arch/x86/kernel/machine_kexec_32.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/machine_kexec_32.c 2008-11-17 13:38:03.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/machine_kexec_32.c 2008-11-25 12:35:53.000000000 +0100
+@@ -25,6 +25,10 @@
+ #include <asm/system.h>
+ #include <asm/cacheflush.h>
+
++#ifdef CONFIG_XEN
++#include <xen/interface/kexec.h>
++#endif
++
+ #define PAGE_ALIGNED __attribute__ ((__aligned__(PAGE_SIZE)))
+ static u32 kexec_pgd[1024] PAGE_ALIGNED;
+ #ifdef CONFIG_X86_PAE
+@@ -34,6 +38,55 @@ static u32 kexec_pmd1[1024] PAGE_ALIGNED
+ static u32 kexec_pte0[1024] PAGE_ALIGNED;
+ static u32 kexec_pte1[1024] PAGE_ALIGNED;
+
++#ifdef CONFIG_XEN
++
++#define __ma(x) (pfn_to_mfn(__pa((x)) >> PAGE_SHIFT) << PAGE_SHIFT)
++
++#if PAGES_NR > KEXEC_XEN_NO_PAGES
++#error PAGES_NR is greater than KEXEC_XEN_NO_PAGES - Xen support will break
++#endif
++
++#if PA_CONTROL_PAGE != 0
++#error PA_CONTROL_PAGE is non zero - Xen support will break
++#endif
++
++void machine_kexec_setup_load_arg(xen_kexec_image_t *xki, struct kimage *image)
++{
++ void *control_page;
++
++ memset(xki->page_list, 0, sizeof(xki->page_list));
++
++ control_page = page_address(image->control_code_page);
++ memcpy(control_page, relocate_kernel, PAGE_SIZE);
++
++ xki->page_list[PA_CONTROL_PAGE] = __ma(control_page);
++ xki->page_list[PA_PGD] = __ma(kexec_pgd);
++#ifdef CONFIG_X86_PAE
++ xki->page_list[PA_PMD_0] = __ma(kexec_pmd0);
++ xki->page_list[PA_PMD_1] = __ma(kexec_pmd1);
++#endif
++ xki->page_list[PA_PTE_0] = __ma(kexec_pte0);
++ xki->page_list[PA_PTE_1] = __ma(kexec_pte1);
++
++}
++
++int __init machine_kexec_setup_resources(struct resource *hypervisor,
++ struct resource *phys_cpus,
++ int nr_phys_cpus)
++{
++ int k;
++
++ /* The per-cpu crash note resources belong to the hypervisor resource */
++ for (k = 0; k < nr_phys_cpus; k++)
++ request_resource(hypervisor, phys_cpus + k);
++
++ return 0;
++}
++
++void machine_kexec_register_resources(struct resource *res) { ; }
++
++#endif /* CONFIG_XEN */
++
+ /*
+ * A architecture hook called to validate the
+ * proposed image and prepare the control pages
+@@ -64,6 +117,7 @@ void machine_kexec_cleanup(struct kimage
+ set_pages_nx(image->control_code_page, 1);
+ }
+
++#ifndef CONFIG_XEN
+ /*
+ * Do not allocate memory (or fail in any way) in machine_kexec().
+ * We are past the point of no return, committed to rebooting now.
+@@ -137,6 +191,7 @@ void machine_kexec(struct kimage *image)
+
+ __ftrace_enabled_restore(save_ftrace_enabled);
+ }
++#endif
+
+ void arch_crash_save_vmcoreinfo(void)
+ {
+Index: head-2008-11-25/arch/x86/kernel/vm86_32.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/vm86_32.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/vm86_32.c 2008-11-25 12:35:53.000000000 +0100
+@@ -124,7 +124,9 @@ static int copy_vm86_regs_from_user(stru
+
+ struct pt_regs *save_v86_state(struct kernel_vm86_regs *regs)
+ {
++#ifndef CONFIG_X86_NO_TSS
+ struct tss_struct *tss;
++#endif
+ struct pt_regs *ret;
+ unsigned long tmp;
+
+@@ -147,12 +149,16 @@ struct pt_regs *save_v86_state(struct ke
+ do_exit(SIGSEGV);
+ }
+
++#ifndef CONFIG_X86_NO_TSS
+ tss = &per_cpu(init_tss, get_cpu());
++#endif
+ current->thread.sp0 = current->thread.saved_sp0;
+ current->thread.sysenter_cs = __KERNEL_CS;
+ load_sp0(tss, ¤t->thread);
+ current->thread.saved_sp0 = 0;
++#ifndef CONFIG_X86_NO_TSS
+ put_cpu();
++#endif
+
+ ret = KVM86->regs32;
+
+@@ -279,7 +285,9 @@ out:
+
+ static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk)
+ {
++#ifndef CONFIG_X86_NO_TSS
+ struct tss_struct *tss;
++#endif
+ /*
+ * make sure the vm86() system call doesn't try to do anything silly
+ */
+@@ -324,12 +332,16 @@ static void do_sys_vm86(struct kernel_vm
+ tsk->thread.saved_fs = info->regs32->fs;
+ savesegment(gs, tsk->thread.saved_gs);
+
++#ifndef CONFIG_X86_NO_TSS
+ tss = &per_cpu(init_tss, get_cpu());
++#endif
+ tsk->thread.sp0 = (unsigned long) &info->VM86_TSS_ESP0;
+ if (cpu_has_sep)
+ tsk->thread.sysenter_cs = 0;
+ load_sp0(tss, &tsk->thread);
++#ifndef CONFIG_X86_NO_TSS
+ put_cpu();
++#endif
+
+ tsk->thread.screen_bitmap = info->screen_bitmap;
+ if (info->flags & VM86_SCREEN_BITMAP)
+Index: head-2008-11-25/arch/x86/power/cpu_32.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/power/cpu_32.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/power/cpu_32.c 2008-11-25 12:35:53.000000000 +0100
+@@ -65,6 +65,7 @@ static void do_fpu_end(void)
+
+ static void fix_processor_context(void)
+ {
++#ifndef CONFIG_X86_NO_TSS
+ int cpu = smp_processor_id();
+ struct tss_struct *t = &per_cpu(init_tss, cpu);
+
+@@ -74,6 +75,7 @@ static void fix_processor_context(void)
+ * 386 hardware has concept of busy TSS or some
+ * similar stupidity.
+ */
++#endif
+
+ load_TR_desc(); /* This does ltr */
+ load_LDT(¤t->active_mm->context); /* This does lldt */
+Index: head-2008-11-25/arch/x86/vdso/vdso32-setup.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/vdso/vdso32-setup.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/vdso/vdso32-setup.c 2008-11-25 12:35:53.000000000 +0100
+@@ -26,6 +26,10 @@
+ #include <asm/vdso.h>
+ #include <asm/proto.h>
+
++#ifdef CONFIG_XEN
++#include <xen/interface/callback.h>
++#endif
++
+ enum {
+ VDSO_DISABLED = 0,
+ VDSO_ENABLED = 1,
+@@ -225,6 +229,7 @@ static inline void map_compat_vdso(int m
+
+ void enable_sep_cpu(void)
+ {
++#ifndef CONFIG_XEN
+ int cpu = get_cpu();
+ struct tss_struct *tss = &per_cpu(init_tss, cpu);
+
+@@ -239,6 +244,35 @@ void enable_sep_cpu(void)
+ wrmsr(MSR_IA32_SYSENTER_ESP, tss->x86_tss.sp1, 0);
+ wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long) ia32_sysenter_target, 0);
+ put_cpu();
++#else
++ extern asmlinkage void ia32pv_sysenter_target(void);
++ static struct callback_register sysenter = {
++ .type = CALLBACKTYPE_sysenter,
++ .address = { __KERNEL_CS, (unsigned long)ia32pv_sysenter_target },
++ };
++
++ if (!boot_cpu_has(X86_FEATURE_SEP))
++ return;
++
++ get_cpu();
++
++ if (xen_feature(XENFEAT_supervisor_mode_kernel))
++ sysenter.address.eip = (unsigned long)ia32_sysenter_target;
++
++ switch (HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter)) {
++ case 0:
++ break;
++#if CONFIG_XEN_COMPAT < 0x030200
++ case -ENOSYS:
++ sysenter.type = CALLBACKTYPE_sysenter_deprecated;
++ if (HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter) == 0)
++ break;
++#endif
++ default:
++ clear_bit(X86_FEATURE_SEP, boot_cpu_data.x86_capability);
++ break;
++ }
++#endif
+ }
+
+ static struct vm_area_struct gate_vma;
--- /dev/null
+Subject: xen3 arch-x86_64
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-11-25/arch/x86/kernel/asm-offsets_64.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/asm-offsets_64.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/asm-offsets_64.c 2008-11-25 12:35:54.000000000 +0100
+@@ -122,8 +122,10 @@ int main(void)
+ ENTRY(cr8);
+ BLANK();
+ #undef ENTRY
++#ifndef CONFIG_X86_NO_TSS
+ DEFINE(TSS_ist, offsetof(struct tss_struct, x86_tss.ist));
+ BLANK();
++#endif
+ DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
+ BLANK();
+ DEFINE(__NR_syscall_max, sizeof(syscalls) - 1);
+Index: head-2008-11-25/arch/x86/kernel/machine_kexec_64.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/machine_kexec_64.c 2008-08-18 10:13:08.000000000 +0200
++++ head-2008-11-25/arch/x86/kernel/machine_kexec_64.c 2008-11-25 12:35:54.000000000 +0100
+@@ -27,6 +27,119 @@ static u64 kexec_pud1[512] PAGE_ALIGNED;
+ static u64 kexec_pmd1[512] PAGE_ALIGNED;
+ static u64 kexec_pte1[512] PAGE_ALIGNED;
+
++#ifdef CONFIG_XEN
++
++/* In the case of Xen, override hypervisor functions to be able to create
++ * a regular identity mapping page table...
++ */
++
++#include <xen/interface/kexec.h>
++#include <xen/interface/memory.h>
++
++#define x__pmd(x) ((pmd_t) { (x) } )
++#define x__pud(x) ((pud_t) { (x) } )
++#define x__pgd(x) ((pgd_t) { (x) } )
++
++#define x_pmd_val(x) ((x).pmd)
++#define x_pud_val(x) ((x).pud)
++#define x_pgd_val(x) ((x).pgd)
++
++static inline void x_set_pmd(pmd_t *dst, pmd_t val)
++{
++ x_pmd_val(*dst) = x_pmd_val(val);
++}
++
++static inline void x_set_pud(pud_t *dst, pud_t val)
++{
++ x_pud_val(*dst) = phys_to_machine(x_pud_val(val));
++}
++
++static inline void x_pud_clear (pud_t *pud)
++{
++ x_pud_val(*pud) = 0;
++}
++
++static inline void x_set_pgd(pgd_t *dst, pgd_t val)
++{
++ x_pgd_val(*dst) = phys_to_machine(x_pgd_val(val));
++}
++
++static inline void x_pgd_clear (pgd_t * pgd)
++{
++ x_pgd_val(*pgd) = 0;
++}
++
++#define X__PAGE_KERNEL_LARGE_EXEC \
++ _PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_PSE
++#define X_KERNPG_TABLE _PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY
++
++#define __ma(x) (pfn_to_mfn(__pa((x)) >> PAGE_SHIFT) << PAGE_SHIFT)
++
++#if PAGES_NR > KEXEC_XEN_NO_PAGES
++#error PAGES_NR is greater than KEXEC_XEN_NO_PAGES - Xen support will break
++#endif
++
++#if PA_CONTROL_PAGE != 0
++#error PA_CONTROL_PAGE is non zero - Xen support will break
++#endif
++
++void machine_kexec_setup_load_arg(xen_kexec_image_t *xki, struct kimage *image)
++{
++ void *control_page;
++ void *table_page;
++
++ memset(xki->page_list, 0, sizeof(xki->page_list));
++
++ control_page = page_address(image->control_code_page) + PAGE_SIZE;
++ memcpy(control_page, relocate_kernel, PAGE_SIZE);
++
++ table_page = page_address(image->control_code_page);
++
++ xki->page_list[PA_CONTROL_PAGE] = __ma(control_page);
++ xki->page_list[PA_TABLE_PAGE] = __ma(table_page);
++
++ xki->page_list[PA_PGD] = __ma(kexec_pgd);
++ xki->page_list[PA_PUD_0] = __ma(kexec_pud0);
++ xki->page_list[PA_PUD_1] = __ma(kexec_pud1);
++ xki->page_list[PA_PMD_0] = __ma(kexec_pmd0);
++ xki->page_list[PA_PMD_1] = __ma(kexec_pmd1);
++ xki->page_list[PA_PTE_0] = __ma(kexec_pte0);
++ xki->page_list[PA_PTE_1] = __ma(kexec_pte1);
++}
++
++int __init machine_kexec_setup_resources(struct resource *hypervisor,
++ struct resource *phys_cpus,
++ int nr_phys_cpus)
++{
++ int k;
++
++ /* The per-cpu crash note resources belong to the hypervisor resource */
++ for (k = 0; k < nr_phys_cpus; k++)
++ request_resource(hypervisor, phys_cpus + k);
++
++ return 0;
++}
++
++void machine_kexec_register_resources(struct resource *res) { ; }
++
++#else /* CONFIG_XEN */
++
++#define x__pmd(x) __pmd(x)
++#define x__pud(x) __pud(x)
++#define x__pgd(x) __pgd(x)
++
++#define x_set_pmd(x, y) set_pmd(x, y)
++#define x_set_pud(x, y) set_pud(x, y)
++#define x_set_pgd(x, y) set_pgd(x, y)
++
++#define x_pud_clear(x) pud_clear(x)
++#define x_pgd_clear(x) pgd_clear(x)
++
++#define X__PAGE_KERNEL_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
++#define X_KERNPG_TABLE _KERNPG_TABLE
++
++#endif /* CONFIG_XEN */
++
+ static void init_level2_page(pmd_t *level2p, unsigned long addr)
+ {
+ unsigned long end_addr;
+@@ -34,7 +147,7 @@ static void init_level2_page(pmd_t *leve
+ addr &= PAGE_MASK;
+ end_addr = addr + PUD_SIZE;
+ while (addr < end_addr) {
+- set_pmd(level2p++, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC));
++ x_set_pmd(level2p++, x__pmd(addr | X__PAGE_KERNEL_LARGE_EXEC));
+ addr += PMD_SIZE;
+ }
+ }
+@@ -59,12 +172,12 @@ static int init_level3_page(struct kimag
+ }
+ level2p = (pmd_t *)page_address(page);
+ init_level2_page(level2p, addr);
+- set_pud(level3p++, __pud(__pa(level2p) | _KERNPG_TABLE));
++ x_set_pud(level3p++, x__pud(__pa(level2p) | X_KERNPG_TABLE));
+ addr += PUD_SIZE;
+ }
+ /* clear the unused entries */
+ while (addr < end_addr) {
+- pud_clear(level3p++);
++ x_pud_clear(level3p++);
+ addr += PUD_SIZE;
+ }
+ out:
+@@ -95,12 +208,12 @@ static int init_level4_page(struct kimag
+ if (result) {
+ goto out;
+ }
+- set_pgd(level4p++, __pgd(__pa(level3p) | _KERNPG_TABLE));
++ x_set_pgd(level4p++, x__pgd(__pa(level3p) | X_KERNPG_TABLE));
+ addr += PGDIR_SIZE;
+ }
+ /* clear the unused entries */
+ while (addr < end_addr) {
+- pgd_clear(level4p++);
++ x_pgd_clear(level4p++);
+ addr += PGDIR_SIZE;
+ }
+ out:
+@@ -111,8 +224,14 @@ out:
+ static int init_pgtable(struct kimage *image, unsigned long start_pgtable)
+ {
+ pgd_t *level4p;
++ unsigned long x_max_pfn = max_pfn;
++
++#ifdef CONFIG_XEN
++ x_max_pfn = HYPERVISOR_memory_op(XENMEM_maximum_ram_page, NULL);
++#endif
++
+ level4p = (pgd_t *)__va(start_pgtable);
+- return init_level4_page(image, level4p, 0, max_pfn << PAGE_SHIFT);
++ return init_level4_page(image, level4p, 0, x_max_pfn << PAGE_SHIFT);
+ }
+
+ int machine_kexec_prepare(struct kimage *image)
+@@ -136,6 +255,7 @@ void machine_kexec_cleanup(struct kimage
+ return;
+ }
+
++#ifndef CONFIG_XEN
+ /*
+ * Do not allocate memory (or fail in any way) in machine_kexec().
+ * We are past the point of no return, committed to rebooting now.
+@@ -176,6 +296,7 @@ void machine_kexec(struct kimage *image)
+ relocate_kernel((unsigned long)image->head, (unsigned long)page_list,
+ image->start);
+ }
++#endif
+
+ void arch_crash_save_vmcoreinfo(void)
+ {
+Index: head-2008-11-25/arch/x86/power/cpu_64.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/power/cpu_64.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/power/cpu_64.c 2008-11-25 12:35:54.000000000 +0100
+@@ -135,6 +135,7 @@ void restore_processor_state(void)
+
+ static void fix_processor_context(void)
+ {
++#ifndef CONFIG_X86_NO_TSS
+ int cpu = smp_processor_id();
+ struct tss_struct *t = &per_cpu(init_tss, cpu);
+
+@@ -146,6 +147,7 @@ static void fix_processor_context(void)
+ set_tss_desc(cpu, t);
+
+ get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
++#endif
+
+ syscall_init(); /* This sets MSR_*STAR and related */
+ load_TR_desc(); /* This does ltr */
+Index: head-2008-11-25/arch/x86/vdso/Makefile
+===================================================================
+--- head-2008-11-25.orig/arch/x86/vdso/Makefile 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/arch/x86/vdso/Makefile 2008-11-25 12:35:54.000000000 +0100
+@@ -65,6 +65,8 @@ obj-$(VDSO32-y) += vdso32-syms.lds
+ vdso32.so-$(VDSO32-y) += int80
+ vdso32.so-$(CONFIG_COMPAT) += syscall
+ vdso32.so-$(VDSO32-y) += sysenter
++xen-vdso32-$(subst 1,$(CONFIG_COMPAT),$(shell expr $(CONFIG_XEN_COMPAT)0 '<' 0x0302000)) += int80
++vdso32.so-$(CONFIG_XEN) += $(xen-vdso32-y)
+
+ vdso32-images = $(vdso32.so-y:%=vdso32-%.so)
+
--- /dev/null
+Subject: Fix Xen build wrt. Xen files coming from mainline.
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg (tip 728:832aac894efd)
+Patch-mainline: obsolete
+
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-11-25/drivers/xen/Makefile
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/Makefile 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/xen/Makefile 2008-11-25 12:35:56.000000000 +0100
+@@ -1,4 +1,25 @@
+-obj-y += grant-table.o features.o events.o manage.o
++obj-y += core/
++obj-y += console/
++obj-y += evtchn/
+ obj-y += xenbus/
+-obj-$(CONFIG_XEN_XENCOMM) += xencomm.o
+-obj-$(CONFIG_XEN_BALLOON) += balloon.o
++obj-y += char/
++
++obj-y += util.o
++obj-$(CONFIG_XEN_BALLOON) += balloon/
++obj-$(CONFIG_XEN_BLKDEV_BACKEND) += blkback/
++obj-$(CONFIG_XEN_BLKDEV_TAP) += blktap/
++obj-$(CONFIG_XEN_NETDEV_BACKEND) += netback/
++obj-$(CONFIG_XEN_TPMDEV_BACKEND) += tpmback/
++obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += blkfront/
++obj-$(CONFIG_XEN_NETDEV_FRONTEND) += netfront/
++obj-$(CONFIG_XEN_PCIDEV_BACKEND) += pciback/
++obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += pcifront/
++obj-$(CONFIG_XEN_FRAMEBUFFER) += fbfront/
++obj-$(CONFIG_XEN_KEYBOARD) += fbfront/
++obj-$(CONFIG_XEN_SCSI_BACKEND) += scsiback/
++obj-$(CONFIG_XEN_SCSI_FRONTEND) += scsifront/
++obj-$(CONFIG_XEN_PRIVCMD) += privcmd/
++obj-$(CONFIG_XEN_GRANT_DEV) += gntdev/
++obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_UTIL) += sfc_netutil/
++obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_FRONTEND) += sfc_netfront/
++obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_BACKEND) += sfc_netback/
+Index: head-2008-11-25/drivers/xen/xenbus/Makefile
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/xenbus/Makefile 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/xen/xenbus/Makefile 2008-11-25 12:35:56.000000000 +0100
+@@ -1,7 +1,9 @@
+-obj-y += xenbus.o
++obj-y += xenbus_client.o xenbus_comms.o xenbus_xs.o xenbus_probe.o
++obj-$(CONFIG_XEN_BACKEND) += xenbus_be.o
+
+-xenbus-objs =
+-xenbus-objs += xenbus_client.o
+-xenbus-objs += xenbus_comms.o
+-xenbus-objs += xenbus_xs.o
+-xenbus-objs += xenbus_probe.o
++xenbus_be-objs =
++xenbus_be-objs += xenbus_backend_client.o
++
++xenbus-$(CONFIG_XEN_BACKEND) += xenbus_probe_backend.o
++obj-y += $(xenbus-y) $(xenbus-m)
++obj-$(CONFIG_XEN_XENBUS_DEV) += xenbus_dev.o
+Index: head-2008-11-25/drivers/xen/xenbus/xenbus_client.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/xenbus/xenbus_client.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/xen/xenbus/xenbus_client.c 2008-11-25 12:35:56.000000000 +0100
+@@ -30,14 +30,18 @@
+ * IN THE SOFTWARE.
+ */
+
+-#include <linux/types.h>
+-#include <linux/vmalloc.h>
+-#include <asm/xen/hypervisor.h>
+-#include <xen/interface/xen.h>
+-#include <xen/interface/event_channel.h>
+-#include <xen/events.h>
+-#include <xen/grant_table.h>
++#include <linux/slab.h>
++#include <xen/evtchn.h>
++#include <xen/gnttab.h>
+ #include <xen/xenbus.h>
++#include <xen/driver_util.h>
++
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++#define DPRINTK(fmt, args...) \
++ pr_debug("xenbus_client (%s:%d) " fmt ".\n", __FUNCTION__, __LINE__, ##args)
+
+ const char *xenbus_strstate(enum xenbus_state state)
+ {
+@@ -54,20 +58,6 @@ const char *xenbus_strstate(enum xenbus_
+ }
+ EXPORT_SYMBOL_GPL(xenbus_strstate);
+
+-/**
+- * xenbus_watch_path - register a watch
+- * @dev: xenbus device
+- * @path: path to watch
+- * @watch: watch to register
+- * @callback: callback to register
+- *
+- * Register a @watch on the given path, using the given xenbus_watch structure
+- * for storage, and the given @callback function as the callback. Return 0 on
+- * success, or -errno on error. On success, the given @path will be saved as
+- * @watch->node, and remains the caller's to free. On error, @watch->node will
+- * be NULL, the device will switch to %XenbusStateClosing, and the error will
+- * be saved in the store.
+- */
+ int xenbus_watch_path(struct xenbus_device *dev, const char *path,
+ struct xenbus_watch *watch,
+ void (*callback)(struct xenbus_watch *,
+@@ -91,58 +81,26 @@ int xenbus_watch_path(struct xenbus_devi
+ EXPORT_SYMBOL_GPL(xenbus_watch_path);
+
+
+-/**
+- * xenbus_watch_pathfmt - register a watch on a sprintf-formatted path
+- * @dev: xenbus device
+- * @watch: watch to register
+- * @callback: callback to register
+- * @pathfmt: format of path to watch
+- *
+- * Register a watch on the given @path, using the given xenbus_watch
+- * structure for storage, and the given @callback function as the callback.
+- * Return 0 on success, or -errno on error. On success, the watched path
+- * (@path/@path2) will be saved as @watch->node, and becomes the caller's to
+- * kfree(). On error, watch->node will be NULL, so the caller has nothing to
+- * free, the device will switch to %XenbusStateClosing, and the error will be
+- * saved in the store.
+- */
+-int xenbus_watch_pathfmt(struct xenbus_device *dev,
+- struct xenbus_watch *watch,
+- void (*callback)(struct xenbus_watch *,
+- const char **, unsigned int),
+- const char *pathfmt, ...)
++int xenbus_watch_path2(struct xenbus_device *dev, const char *path,
++ const char *path2, struct xenbus_watch *watch,
++ void (*callback)(struct xenbus_watch *,
++ const char **, unsigned int))
+ {
+ int err;
+- va_list ap;
+- char *path;
+-
+- va_start(ap, pathfmt);
+- path = kvasprintf(GFP_NOIO | __GFP_HIGH, pathfmt, ap);
+- va_end(ap);
+-
+- if (!path) {
++ char *state = kasprintf(GFP_NOIO | __GFP_HIGH, "%s/%s", path, path2);
++ if (!state) {
+ xenbus_dev_fatal(dev, -ENOMEM, "allocating path for watch");
+ return -ENOMEM;
+ }
+- err = xenbus_watch_path(dev, path, watch, callback);
++ err = xenbus_watch_path(dev, state, watch, callback);
+
+ if (err)
+- kfree(path);
++ kfree(state);
+ return err;
+ }
+-EXPORT_SYMBOL_GPL(xenbus_watch_pathfmt);
++EXPORT_SYMBOL_GPL(xenbus_watch_path2);
+
+
+-/**
+- * xenbus_switch_state
+- * @dev: xenbus device
+- * @xbt: transaction handle
+- * @state: new state
+- *
+- * Advertise in the store a change of the given driver to the given new_state.
+- * Return 0 on success, or -errno on error. On error, the device will switch
+- * to XenbusStateClosing, and the error will be saved in the store.
+- */
+ int xenbus_switch_state(struct xenbus_device *dev, enum xenbus_state state)
+ {
+ /* We check whether the state is currently set to the given value, and
+@@ -201,13 +159,12 @@ static char *error_path(struct xenbus_de
+ }
+
+
+-static void xenbus_va_dev_error(struct xenbus_device *dev, int err,
+- const char *fmt, va_list ap)
++void _dev_error(struct xenbus_device *dev, int err, const char *fmt,
++ va_list ap)
+ {
+ int ret;
+ unsigned int len;
+- char *printf_buffer = NULL;
+- char *path_buffer = NULL;
++ char *printf_buffer = NULL, *path_buffer = NULL;
+
+ #define PRINTF_BUFFER_SIZE 4096
+ printf_buffer = kmalloc(PRINTF_BUFFER_SIZE, GFP_KERNEL);
+@@ -224,74 +181,51 @@ static void xenbus_va_dev_error(struct x
+ path_buffer = error_path(dev);
+
+ if (path_buffer == NULL) {
+- dev_err(&dev->dev, "failed to write error node for %s (%s)\n",
++ printk("xenbus: failed to write error node for %s (%s)\n",
+ dev->nodename, printf_buffer);
+ goto fail;
+ }
+
+ if (xenbus_write(XBT_NIL, path_buffer, "error", printf_buffer) != 0) {
+- dev_err(&dev->dev, "failed to write error node for %s (%s)\n",
++ printk("xenbus: failed to write error node for %s (%s)\n",
+ dev->nodename, printf_buffer);
+ goto fail;
+ }
+
+ fail:
+- kfree(printf_buffer);
+- kfree(path_buffer);
++ if (printf_buffer)
++ kfree(printf_buffer);
++ if (path_buffer)
++ kfree(path_buffer);
+ }
+
+
+-/**
+- * xenbus_dev_error
+- * @dev: xenbus device
+- * @err: error to report
+- * @fmt: error message format
+- *
+- * Report the given negative errno into the store, along with the given
+- * formatted message.
+- */
+-void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...)
++void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt,
++ ...)
+ {
+ va_list ap;
+
+ va_start(ap, fmt);
+- xenbus_va_dev_error(dev, err, fmt, ap);
++ _dev_error(dev, err, fmt, ap);
+ va_end(ap);
+ }
+ EXPORT_SYMBOL_GPL(xenbus_dev_error);
+
+-/**
+- * xenbus_dev_fatal
+- * @dev: xenbus device
+- * @err: error to report
+- * @fmt: error message format
+- *
+- * Equivalent to xenbus_dev_error(dev, err, fmt, args), followed by
+- * xenbus_switch_state(dev, NULL, XenbusStateClosing) to schedule an orderly
+- * closedown of this driver and its peer.
+- */
+
+-void xenbus_dev_fatal(struct xenbus_device *dev, int err, const char *fmt, ...)
++void xenbus_dev_fatal(struct xenbus_device *dev, int err, const char *fmt,
++ ...)
+ {
+ va_list ap;
+
+ va_start(ap, fmt);
+- xenbus_va_dev_error(dev, err, fmt, ap);
++ _dev_error(dev, err, fmt, ap);
+ va_end(ap);
+
+ xenbus_switch_state(dev, XenbusStateClosing);
+ }
+ EXPORT_SYMBOL_GPL(xenbus_dev_fatal);
+
+-/**
+- * xenbus_grant_ring
+- * @dev: xenbus device
+- * @ring_mfn: mfn of ring to grant
+-
+- * Grant access to the given @ring_mfn to the peer of the given device. Return
+- * 0 on success, or -errno on error. On error, the device will switch to
+- * XenbusStateClosing, and the error will be saved in the store.
+- */
++
+ int xenbus_grant_ring(struct xenbus_device *dev, unsigned long ring_mfn)
+ {
+ int err = gnttab_grant_foreign_access(dev->otherend_id, ring_mfn, 0);
+@@ -302,18 +236,12 @@ int xenbus_grant_ring(struct xenbus_devi
+ EXPORT_SYMBOL_GPL(xenbus_grant_ring);
+
+
+-/**
+- * Allocate an event channel for the given xenbus_device, assigning the newly
+- * created local port to *port. Return 0 on success, or -errno on error. On
+- * error, the device will switch to XenbusStateClosing, and the error will be
+- * saved in the store.
+- */
+ int xenbus_alloc_evtchn(struct xenbus_device *dev, int *port)
+ {
+ struct evtchn_alloc_unbound alloc_unbound;
+ int err;
+
+- alloc_unbound.dom = DOMID_SELF;
++ alloc_unbound.dom = DOMID_SELF;
+ alloc_unbound.remote_dom = dev->otherend_id;
+
+ err = HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound,
+@@ -328,36 +256,6 @@ int xenbus_alloc_evtchn(struct xenbus_de
+ EXPORT_SYMBOL_GPL(xenbus_alloc_evtchn);
+
+
+-/**
+- * Bind to an existing interdomain event channel in another domain. Returns 0
+- * on success and stores the local port in *port. On error, returns -errno,
+- * switches the device to XenbusStateClosing, and saves the error in XenStore.
+- */
+-int xenbus_bind_evtchn(struct xenbus_device *dev, int remote_port, int *port)
+-{
+- struct evtchn_bind_interdomain bind_interdomain;
+- int err;
+-
+- bind_interdomain.remote_dom = dev->otherend_id;
+- bind_interdomain.remote_port = remote_port;
+-
+- err = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain,
+- &bind_interdomain);
+- if (err)
+- xenbus_dev_fatal(dev, err,
+- "binding to event channel %d from domain %d",
+- remote_port, dev->otherend_id);
+- else
+- *port = bind_interdomain.local_port;
+-
+- return err;
+-}
+-EXPORT_SYMBOL_GPL(xenbus_bind_evtchn);
+-
+-
+-/**
+- * Free an existing event channel. Returns 0 on success or -errno on error.
+- */
+ int xenbus_free_evtchn(struct xenbus_device *dev, int port)
+ {
+ struct evtchn_close close;
+@@ -374,189 +272,6 @@ int xenbus_free_evtchn(struct xenbus_dev
+ EXPORT_SYMBOL_GPL(xenbus_free_evtchn);
+
+
+-/**
+- * xenbus_map_ring_valloc
+- * @dev: xenbus device
+- * @gnt_ref: grant reference
+- * @vaddr: pointer to address to be filled out by mapping
+- *
+- * Based on Rusty Russell's skeleton driver's map_page.
+- * Map a page of memory into this domain from another domain's grant table.
+- * xenbus_map_ring_valloc allocates a page of virtual address space, maps the
+- * page to that address, and sets *vaddr to that address.
+- * Returns 0 on success, and GNTST_* (see xen/include/interface/grant_table.h)
+- * or -ENOMEM on error. If an error is returned, device will switch to
+- * XenbusStateClosing and the error message will be saved in XenStore.
+- */
+-int xenbus_map_ring_valloc(struct xenbus_device *dev, int gnt_ref, void **vaddr)
+-{
+- struct gnttab_map_grant_ref op = {
+- .flags = GNTMAP_host_map,
+- .ref = gnt_ref,
+- .dom = dev->otherend_id,
+- };
+- struct vm_struct *area;
+-
+- *vaddr = NULL;
+-
+- area = xen_alloc_vm_area(PAGE_SIZE);
+- if (!area)
+- return -ENOMEM;
+-
+- op.host_addr = (unsigned long)area->addr;
+-
+- if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
+- BUG();
+-
+- if (op.status != GNTST_okay) {
+- xen_free_vm_area(area);
+- xenbus_dev_fatal(dev, op.status,
+- "mapping in shared page %d from domain %d",
+- gnt_ref, dev->otherend_id);
+- return op.status;
+- }
+-
+- /* Stuff the handle in an unused field */
+- area->phys_addr = (unsigned long)op.handle;
+-
+- *vaddr = area->addr;
+- return 0;
+-}
+-EXPORT_SYMBOL_GPL(xenbus_map_ring_valloc);
+-
+-
+-/**
+- * xenbus_map_ring
+- * @dev: xenbus device
+- * @gnt_ref: grant reference
+- * @handle: pointer to grant handle to be filled
+- * @vaddr: address to be mapped to
+- *
+- * Map a page of memory into this domain from another domain's grant table.
+- * xenbus_map_ring does not allocate the virtual address space (you must do
+- * this yourself!). It only maps in the page to the specified address.
+- * Returns 0 on success, and GNTST_* (see xen/include/interface/grant_table.h)
+- * or -ENOMEM on error. If an error is returned, device will switch to
+- * XenbusStateClosing and the error message will be saved in XenStore.
+- */
+-int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref,
+- grant_handle_t *handle, void *vaddr)
+-{
+- struct gnttab_map_grant_ref op = {
+- .host_addr = (unsigned long)vaddr,
+- .flags = GNTMAP_host_map,
+- .ref = gnt_ref,
+- .dom = dev->otherend_id,
+- };
+-
+- if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
+- BUG();
+-
+- if (op.status != GNTST_okay) {
+- xenbus_dev_fatal(dev, op.status,
+- "mapping in shared page %d from domain %d",
+- gnt_ref, dev->otherend_id);
+- } else
+- *handle = op.handle;
+-
+- return op.status;
+-}
+-EXPORT_SYMBOL_GPL(xenbus_map_ring);
+-
+-
+-/**
+- * xenbus_unmap_ring_vfree
+- * @dev: xenbus device
+- * @vaddr: addr to unmap
+- *
+- * Based on Rusty Russell's skeleton driver's unmap_page.
+- * Unmap a page of memory in this domain that was imported from another domain.
+- * Use xenbus_unmap_ring_vfree if you mapped in your memory with
+- * xenbus_map_ring_valloc (it will free the virtual address space).
+- * Returns 0 on success and returns GNTST_* on error
+- * (see xen/include/interface/grant_table.h).
+- */
+-int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr)
+-{
+- struct vm_struct *area;
+- struct gnttab_unmap_grant_ref op = {
+- .host_addr = (unsigned long)vaddr,
+- };
+-
+- /* It'd be nice if linux/vmalloc.h provided a find_vm_area(void *addr)
+- * method so that we don't have to muck with vmalloc internals here.
+- * We could force the user to hang on to their struct vm_struct from
+- * xenbus_map_ring_valloc, but these 6 lines considerably simplify
+- * this API.
+- */
+- read_lock(&vmlist_lock);
+- for (area = vmlist; area != NULL; area = area->next) {
+- if (area->addr == vaddr)
+- break;
+- }
+- read_unlock(&vmlist_lock);
+-
+- if (!area) {
+- xenbus_dev_error(dev, -ENOENT,
+- "can't find mapped virtual address %p", vaddr);
+- return GNTST_bad_virt_addr;
+- }
+-
+- op.handle = (grant_handle_t)area->phys_addr;
+-
+- if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
+- BUG();
+-
+- if (op.status == GNTST_okay)
+- xen_free_vm_area(area);
+- else
+- xenbus_dev_error(dev, op.status,
+- "unmapping page at handle %d error %d",
+- (int16_t)area->phys_addr, op.status);
+-
+- return op.status;
+-}
+-EXPORT_SYMBOL_GPL(xenbus_unmap_ring_vfree);
+-
+-
+-/**
+- * xenbus_unmap_ring
+- * @dev: xenbus device
+- * @handle: grant handle
+- * @vaddr: addr to unmap
+- *
+- * Unmap a page of memory in this domain that was imported from another domain.
+- * Returns 0 on success and returns GNTST_* on error
+- * (see xen/include/interface/grant_table.h).
+- */
+-int xenbus_unmap_ring(struct xenbus_device *dev,
+- grant_handle_t handle, void *vaddr)
+-{
+- struct gnttab_unmap_grant_ref op = {
+- .host_addr = (unsigned long)vaddr,
+- .handle = handle,
+- };
+-
+- if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
+- BUG();
+-
+- if (op.status != GNTST_okay)
+- xenbus_dev_error(dev, op.status,
+- "unmapping page at handle %d error %d",
+- handle, op.status);
+-
+- return op.status;
+-}
+-EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
+-
+-
+-/**
+- * xenbus_read_driver_state
+- * @path: path for driver
+- *
+- * Return the state of the driver rooted at the given store path, or
+- * XenbusStateUnknown if no state can be read.
+- */
+ enum xenbus_state xenbus_read_driver_state(const char *path)
+ {
+ enum xenbus_state result;
+Index: head-2008-11-25/drivers/xen/xenbus/xenbus_comms.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/xenbus/xenbus_comms.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/xen/xenbus/xenbus_comms.c 2008-11-25 12:35:56.000000000 +0100
+@@ -34,19 +34,28 @@
+ #include <linux/interrupt.h>
+ #include <linux/sched.h>
+ #include <linux/err.h>
++#include <linux/ptrace.h>
++#include <linux/workqueue.h>
++#include <xen/evtchn.h>
+ #include <xen/xenbus.h>
+-#include <asm/xen/hypervisor.h>
+-#include <xen/events.h>
+-#include <xen/page.h>
++
++#include <asm/hypervisor.h>
++
+ #include "xenbus_comms.h"
+
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
+ static int xenbus_irq;
+
+-static DECLARE_WORK(probe_work, xenbus_probe);
++extern void xenbus_probe(void *);
++extern int xenstored_ready;
++static DECLARE_WORK(probe_work, xenbus_probe, NULL);
+
+ static DECLARE_WAIT_QUEUE_HEAD(xb_waitq);
+
+-static irqreturn_t wake_waiting(int irq, void *unused)
++static irqreturn_t wake_waiting(int irq, void *unused, struct pt_regs *regs)
+ {
+ if (unlikely(xenstored_ready == 0)) {
+ xenstored_ready = 1;
+@@ -82,13 +91,6 @@ static const void *get_input_chunk(XENST
+ return buf + MASK_XENSTORE_IDX(cons);
+ }
+
+-/**
+- * xb_write - low level write
+- * @data: buffer to send
+- * @len: length of buffer
+- *
+- * Returns 0 on success, error otherwise.
+- */
+ int xb_write(const void *data, unsigned len)
+ {
+ struct xenstore_domain_interface *intf = xen_store_interface;
+@@ -197,12 +199,11 @@ int xb_read(void *data, unsigned len)
+ return 0;
+ }
+
+-/**
+- * xb_init_comms - Set up interrupt handler off store event channel.
+- */
++/* Set up interrupt handler off store event channel. */
+ int xb_init_comms(void)
+ {
+ struct xenstore_domain_interface *intf = xen_store_interface;
++ int err;
+
+ if (intf->req_prod != intf->req_cons)
+ printk(KERN_ERR "XENBUS request ring is not quiescent "
+@@ -215,20 +216,18 @@ int xb_init_comms(void)
+ intf->rsp_cons = intf->rsp_prod;
+ }
+
+- if (xenbus_irq) {
+- /* Already have an irq; assume we're resuming */
+- rebind_evtchn_irq(xen_store_evtchn, xenbus_irq);
+- } else {
+- int err;
+- err = bind_evtchn_to_irqhandler(xen_store_evtchn, wake_waiting,
+- 0, "xenbus", &xb_waitq);
+- if (err <= 0) {
+- printk(KERN_ERR "XENBUS request irq failed %i\n", err);
+- return err;
+- }
++ if (xenbus_irq)
++ unbind_from_irqhandler(xenbus_irq, &xb_waitq);
+
+- xenbus_irq = err;
++ err = bind_caller_port_to_irqhandler(
++ xen_store_evtchn, wake_waiting,
++ 0, "xenbus", &xb_waitq);
++ if (err <= 0) {
++ printk(KERN_ERR "XENBUS request irq failed %i\n", err);
++ return err;
+ }
+
++ xenbus_irq = err;
++
+ return 0;
+ }
+Index: head-2008-11-25/drivers/xen/xenbus/xenbus_probe.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/xenbus/xenbus_probe.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/xen/xenbus/xenbus_probe.c 2008-11-25 12:35:56.000000000 +0100
+@@ -4,6 +4,7 @@
+ * Copyright (C) 2005 Rusty Russell, IBM Corporation
+ * Copyright (C) 2005 Mike Wray, Hewlett-Packard
+ * Copyright (C) 2005, 2006 XenSource Ltd
++ * Copyright (C) 2007 Solarflare Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+@@ -32,7 +33,7 @@
+
+ #define DPRINTK(fmt, args...) \
+ pr_debug("xenbus_probe (%s:%d) " fmt ".\n", \
+- __func__, __LINE__, ##args)
++ __FUNCTION__, __LINE__, ##args)
+
+ #include <linux/kernel.h>
+ #include <linux/err.h>
+@@ -41,24 +42,35 @@
+ #include <linux/fcntl.h>
+ #include <linux/mm.h>
+ #include <linux/notifier.h>
+-#include <linux/kthread.h>
+ #include <linux/mutex.h>
+-#include <linux/io.h>
++#include <linux/module.h>
+
++#include <asm/io.h>
+ #include <asm/page.h>
++#include <asm/maddr.h>
+ #include <asm/pgtable.h>
+-#include <asm/xen/hypervisor.h>
++#include <asm/hypervisor.h>
+ #include <xen/xenbus.h>
+-#include <xen/events.h>
+-#include <xen/page.h>
++#include <xen/xen_proc.h>
++#include <xen/evtchn.h>
++#include <xen/features.h>
++#ifdef MODULE
++#include <xen/hvm.h>
++#endif
+
+ #include "xenbus_comms.h"
+ #include "xenbus_probe.h"
+
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
+ int xen_store_evtchn;
+ struct xenstore_domain_interface *xen_store_interface;
+ static unsigned long xen_store_mfn;
+
++extern struct mutex xenwatch_mutex;
++
+ static BLOCKING_NOTIFIER_HEAD(xenstore_chain);
+
+ static void wait_for_devices(struct xenbus_driver *xendrv);
+@@ -88,16 +100,6 @@ int xenbus_match(struct device *_dev, st
+ return match_device(drv->ids, to_xenbus_device(_dev)) != NULL;
+ }
+
+-static int xenbus_uevent(struct device *_dev, struct kobj_uevent_env *env)
+-{
+- struct xenbus_device *dev = to_xenbus_device(_dev);
+-
+- if (add_uevent_var(env, "MODALIAS=xen:%s", dev->devicetype))
+- return -ENOMEM;
+-
+- return 0;
+-}
+-
+ /* device/<type>/<id> => <type>-<id> */
+ static int frontend_bus_id(char bus_id[BUS_ID_SIZE], const char *nodename)
+ {
+@@ -166,6 +168,30 @@ static int read_backend_details(struct x
+ return read_otherend_details(xendev, "backend-id", "backend");
+ }
+
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
++static int xenbus_uevent_frontend(struct device *dev, char **envp,
++ int num_envp, char *buffer, int buffer_size)
++{
++ struct xenbus_device *xdev;
++ int length = 0, i = 0;
++
++ if (dev == NULL)
++ return -ENODEV;
++ xdev = to_xenbus_device(dev);
++ if (xdev == NULL)
++ return -ENODEV;
++
++ /* stuff we want to pass to /sbin/hotplug */
++ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++ "XENBUS_TYPE=%s", xdev->devicetype);
++ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++ "XENBUS_PATH=%s", xdev->nodename);
++ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++ "MODALIAS=xen:%s", xdev->devicetype);
++
++ return 0;
++}
++#endif
+
+ /* Bus type for frontend drivers. */
+ static struct xen_bus_type xenbus_frontend = {
+@@ -173,13 +199,19 @@ static struct xen_bus_type xenbus_fronte
+ .levels = 2, /* device/type/<id> */
+ .get_bus_id = frontend_bus_id,
+ .probe = xenbus_probe_frontend,
++ .error = -ENODEV,
+ .bus = {
+ .name = "xen",
+ .match = xenbus_match,
+- .uevent = xenbus_uevent,
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+ .probe = xenbus_dev_probe,
+ .remove = xenbus_dev_remove,
+ .shutdown = xenbus_dev_shutdown,
++ .uevent = xenbus_uevent_frontend,
++#endif
++ },
++ .dev = {
++ .bus_id = "xen",
+ },
+ };
+
+@@ -196,17 +228,16 @@ static void otherend_changed(struct xenb
+ if (!dev->otherend ||
+ strncmp(dev->otherend, vec[XS_WATCH_PATH],
+ strlen(dev->otherend))) {
+- dev_dbg(&dev->dev, "Ignoring watch at %s\n",
+- vec[XS_WATCH_PATH]);
++ DPRINTK("Ignoring watch at %s", vec[XS_WATCH_PATH]);
+ return;
+ }
+
+ state = xenbus_read_driver_state(dev->otherend);
+
+- dev_dbg(&dev->dev, "state is %d, (%s), %s, %s\n",
+- state, xenbus_strstate(state), dev->otherend_watch.node,
+- vec[XS_WATCH_PATH]);
++ DPRINTK("state is %d (%s), %s, %s", state, xenbus_strstate(state),
++ dev->otherend_watch.node, vec[XS_WATCH_PATH]);
+
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+ /*
+ * Ignore xenbus transitions during shutdown. This prevents us doing
+ * work that can fail e.g., when the rootfs is gone.
+@@ -220,6 +251,7 @@ static void otherend_changed(struct xenb
+ xenbus_frontend_closed(dev);
+ return;
+ }
++#endif
+
+ if (drv->otherend_changed)
+ drv->otherend_changed(dev, state);
+@@ -239,8 +271,8 @@ static int talk_to_otherend(struct xenbu
+
+ static int watch_otherend(struct xenbus_device *dev)
+ {
+- return xenbus_watch_pathfmt(dev, &dev->otherend_watch, otherend_changed,
+- "%s/%s", dev->otherend, "state");
++ return xenbus_watch_path2(dev, dev->otherend, "state",
++ &dev->otherend_watch, otherend_changed);
+ }
+
+
+@@ -266,8 +298,9 @@ int xenbus_dev_probe(struct device *_dev
+
+ err = talk_to_otherend(dev);
+ if (err) {
+- dev_warn(&dev->dev, "talk_to_otherend on %s failed.\n",
+- dev->nodename);
++ printk(KERN_WARNING
++ "xenbus_probe: talk_to_otherend on %s failed.\n",
++ dev->nodename);
+ return err;
+ }
+
+@@ -277,7 +310,8 @@ int xenbus_dev_probe(struct device *_dev
+
+ err = watch_otherend(dev);
+ if (err) {
+- dev_warn(&dev->dev, "watch_otherend on %s failed.\n",
++ printk(KERN_WARNING
++ "xenbus_probe: watch_otherend on %s failed.\n",
+ dev->nodename);
+ return err;
+ }
+@@ -313,43 +347,55 @@ static void xenbus_dev_shutdown(struct d
+
+ DPRINTK("%s", dev->nodename);
+
++ if (is_initial_xendomain())
++ return;
++
+ get_device(&dev->dev);
+ if (dev->state != XenbusStateConnected) {
+- printk(KERN_INFO "%s: %s: %s != Connected, skipping\n", __func__,
++ printk("%s: %s: %s != Connected, skipping\n", __FUNCTION__,
+ dev->nodename, xenbus_strstate(dev->state));
+ goto out;
+ }
+ xenbus_switch_state(dev, XenbusStateClosing);
+ timeout = wait_for_completion_timeout(&dev->down, timeout);
+ if (!timeout)
+- printk(KERN_INFO "%s: %s timeout closing device\n",
+- __func__, dev->nodename);
++ printk("%s: %s timeout closing device\n", __FUNCTION__, dev->nodename);
+ out:
+ put_device(&dev->dev);
+ }
+
+ int xenbus_register_driver_common(struct xenbus_driver *drv,
+- struct xen_bus_type *bus,
+- struct module *owner,
+- const char *mod_name)
++ struct xen_bus_type *bus)
+ {
++ int ret;
++
++ if (bus->error)
++ return bus->error;
++
+ drv->driver.name = drv->name;
+ drv->driver.bus = &bus->bus;
+- drv->driver.owner = owner;
+- drv->driver.mod_name = mod_name;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10)
++ drv->driver.owner = drv->owner;
++#endif
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
++ drv->driver.probe = xenbus_dev_probe;
++ drv->driver.remove = xenbus_dev_remove;
++ drv->driver.shutdown = xenbus_dev_shutdown;
++#endif
+
+- return driver_register(&drv->driver);
++ mutex_lock(&xenwatch_mutex);
++ ret = driver_register(&drv->driver);
++ mutex_unlock(&xenwatch_mutex);
++ return ret;
+ }
+
+-int __xenbus_register_frontend(struct xenbus_driver *drv,
+- struct module *owner, const char *mod_name)
++int xenbus_register_frontend(struct xenbus_driver *drv)
+ {
+ int ret;
+
+ drv->read_otherend_details = read_backend_details;
+
+- ret = xenbus_register_driver_common(drv, &xenbus_frontend,
+- owner, mod_name);
++ ret = xenbus_register_driver_common(drv, &xenbus_frontend);
+ if (ret)
+ return ret;
+
+@@ -358,7 +404,7 @@ int __xenbus_register_frontend(struct xe
+
+ return 0;
+ }
+-EXPORT_SYMBOL_GPL(__xenbus_register_frontend);
++EXPORT_SYMBOL_GPL(xenbus_register_frontend);
+
+ void xenbus_unregister_driver(struct xenbus_driver *drv)
+ {
+@@ -436,25 +482,25 @@ static void xenbus_dev_release(struct de
+ }
+
+ static ssize_t xendev_show_nodename(struct device *dev,
+- struct device_attribute *attr, char *buf)
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
++ struct device_attribute *attr,
++#endif
++ char *buf)
+ {
+ return sprintf(buf, "%s\n", to_xenbus_device(dev)->nodename);
+ }
+ DEVICE_ATTR(nodename, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_nodename, NULL);
+
+ static ssize_t xendev_show_devtype(struct device *dev,
+- struct device_attribute *attr, char *buf)
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
++ struct device_attribute *attr,
++#endif
++ char *buf)
+ {
+ return sprintf(buf, "%s\n", to_xenbus_device(dev)->devicetype);
+ }
+ DEVICE_ATTR(devtype, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_devtype, NULL);
+
+-static ssize_t xendev_show_modalias(struct device *dev,
+- struct device_attribute *attr, char *buf)
+-{
+- return sprintf(buf, "xen:%s\n", to_xenbus_device(dev)->devicetype);
+-}
+-DEVICE_ATTR(modalias, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_modalias, NULL);
+
+ int xenbus_probe_node(struct xen_bus_type *bus,
+ const char *type,
+@@ -467,6 +513,9 @@ int xenbus_probe_node(struct xen_bus_typ
+
+ enum xenbus_state state = xenbus_read_driver_state(nodename);
+
++ if (bus->error)
++ return bus->error;
++
+ if (state != XenbusStateInitialising) {
+ /* Device is not new, so ignore it. This can happen if a
+ device is going away after switching to Closed. */
+@@ -491,6 +540,7 @@ int xenbus_probe_node(struct xen_bus_typ
+ xendev->devicetype = tmpstring;
+ init_completion(&xendev->down);
+
++ xendev->dev.parent = &bus->dev;
+ xendev->dev.bus = &bus->bus;
+ xendev->dev.release = xenbus_dev_release;
+
+@@ -505,22 +555,15 @@ int xenbus_probe_node(struct xen_bus_typ
+
+ err = device_create_file(&xendev->dev, &dev_attr_nodename);
+ if (err)
+- goto fail_unregister;
+-
++ goto unregister;
+ err = device_create_file(&xendev->dev, &dev_attr_devtype);
+ if (err)
+- goto fail_remove_nodename;
+-
+- err = device_create_file(&xendev->dev, &dev_attr_modalias);
+- if (err)
+- goto fail_remove_devtype;
++ goto unregister;
+
+ return 0;
+-fail_remove_devtype:
+- device_remove_file(&xendev->dev, &dev_attr_devtype);
+-fail_remove_nodename:
++unregister:
+ device_remove_file(&xendev->dev, &dev_attr_nodename);
+-fail_unregister:
++ device_remove_file(&xendev->dev, &dev_attr_devtype);
+ device_unregister(&xendev->dev);
+ fail:
+ kfree(xendev);
+@@ -533,8 +576,7 @@ static int xenbus_probe_frontend(const c
+ char *nodename;
+ int err;
+
+- nodename = kasprintf(GFP_KERNEL, "%s/%s/%s",
+- xenbus_frontend.root, type, name);
++ nodename = kasprintf(GFP_KERNEL, "%s/%s/%s", xenbus_frontend.root, type, name);
+ if (!nodename)
+ return -ENOMEM;
+
+@@ -571,6 +613,9 @@ int xenbus_probe_devices(struct xen_bus_
+ char **dir;
+ unsigned int i, dir_n;
+
++ if (bus->error)
++ return bus->error;
++
+ dir = xenbus_directory(XBT_NIL, bus->root, "", &dir_n);
+ if (IS_ERR(dir))
+ return PTR_ERR(dir);
+@@ -607,15 +652,15 @@ static int strsep_len(const char *str, c
+ return (len == 0) ? i : -ERANGE;
+ }
+
+-void xenbus_dev_changed(const char *node, struct xen_bus_type *bus)
++void dev_changed(const char *node, struct xen_bus_type *bus)
+ {
+ int exists, rootlen;
+ struct xenbus_device *dev;
+ char type[BUS_ID_SIZE];
+ const char *p, *root;
+
+- if (char_count(node, '/') < 2)
+- return;
++ if (bus->error || char_count(node, '/') < 2)
++ return;
+
+ exists = xenbus_exists(XBT_NIL, node, "");
+ if (!exists) {
+@@ -649,7 +694,7 @@ static void frontend_changed(struct xenb
+ {
+ DPRINTK("");
+
+- xenbus_dev_changed(vec[XS_WATCH_PATH], &xenbus_frontend);
++ dev_changed(vec[XS_WATCH_PATH], &xenbus_frontend);
+ }
+
+ /* We watch for devices appearing and vanishing. */
+@@ -748,7 +793,8 @@ void xenbus_suspend(void)
+ {
+ DPRINTK("");
+
+- bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, suspend_dev);
++ if (!xenbus_frontend.error)
++ bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, suspend_dev);
+ xenbus_backend_suspend(suspend_dev);
+ xs_suspend();
+ }
+@@ -758,7 +804,8 @@ void xenbus_resume(void)
+ {
+ xb_init_comms();
+ xs_resume();
+- bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, resume_dev);
++ if (!xenbus_frontend.error)
++ bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, resume_dev);
+ xenbus_backend_resume(resume_dev);
+ }
+ EXPORT_SYMBOL_GPL(xenbus_resume);
+@@ -766,7 +813,8 @@ EXPORT_SYMBOL_GPL(xenbus_resume);
+ void xenbus_suspend_cancel(void)
+ {
+ xs_suspend_cancel();
+- bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, suspend_cancel_dev);
++ if (!xenbus_frontend.error)
++ bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, suspend_cancel_dev);
+ xenbus_backend_resume(suspend_cancel_dev);
+ }
+ EXPORT_SYMBOL_GPL(xenbus_suspend_cancel);
+@@ -794,7 +842,8 @@ void unregister_xenstore_notifier(struct
+ }
+ EXPORT_SYMBOL_GPL(unregister_xenstore_notifier);
+
+-void xenbus_probe(struct work_struct *unused)
++
++void xenbus_probe(void *unused)
+ {
+ BUG_ON((xenstored_ready <= 0));
+
+@@ -807,63 +856,171 @@ void xenbus_probe(struct work_struct *un
+ blocking_notifier_call_chain(&xenstore_chain, 0, NULL);
+ }
+
+-static int __init xenbus_probe_init(void)
++
++#if defined(CONFIG_PROC_FS) && defined(CONFIG_XEN_PRIVILEGED_GUEST)
++static struct file_operations xsd_kva_fops;
++static struct proc_dir_entry *xsd_kva_intf;
++static struct proc_dir_entry *xsd_port_intf;
++
++static int xsd_kva_mmap(struct file *file, struct vm_area_struct *vma)
++{
++ size_t size = vma->vm_end - vma->vm_start;
++
++ if ((size > PAGE_SIZE) || (vma->vm_pgoff != 0))
++ return -EINVAL;
++
++ if (remap_pfn_range(vma, vma->vm_start, mfn_to_pfn(xen_store_mfn),
++ size, vma->vm_page_prot))
++ return -EAGAIN;
++
++ return 0;
++}
++
++static int xsd_kva_read(char *page, char **start, off_t off,
++ int count, int *eof, void *data)
++{
++ int len;
++
++ len = sprintf(page, "0x%p", xen_store_interface);
++ *eof = 1;
++ return len;
++}
++
++static int xsd_port_read(char *page, char **start, off_t off,
++ int count, int *eof, void *data)
++{
++ int len;
++
++ len = sprintf(page, "%d", xen_store_evtchn);
++ *eof = 1;
++ return len;
++}
++#endif
++
++static int xenbus_probe_init(void)
+ {
+ int err = 0;
++ unsigned long page = 0;
+
+ DPRINTK("");
+
+- err = -ENODEV;
+ if (!is_running_on_xen())
+- goto out_error;
++ return -ENODEV;
+
+ /* Register ourselves with the kernel bus subsystem */
+- err = bus_register(&xenbus_frontend.bus);
+- if (err)
+- goto out_error;
+-
+- err = xenbus_backend_bus_register();
+- if (err)
+- goto out_unreg_front;
++ xenbus_frontend.error = bus_register(&xenbus_frontend.bus);
++ if (xenbus_frontend.error)
++ printk(KERN_WARNING
++ "XENBUS: Error registering frontend bus: %i\n",
++ xenbus_frontend.error);
++ xenbus_backend_bus_register();
+
+ /*
+ * Domain0 doesn't have a store_evtchn or store_mfn yet.
+ */
+ if (is_initial_xendomain()) {
+- /* dom0 not yet supported */
++ struct evtchn_alloc_unbound alloc_unbound;
++
++ /* Allocate page. */
++ page = get_zeroed_page(GFP_KERNEL);
++ if (!page)
++ return -ENOMEM;
++
++ xen_store_mfn = xen_start_info->store_mfn =
++ pfn_to_mfn(virt_to_phys((void *)page) >>
++ PAGE_SHIFT);
++
++ /* Next allocate a local port which xenstored can bind to */
++ alloc_unbound.dom = DOMID_SELF;
++ alloc_unbound.remote_dom = 0;
++
++ err = HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound,
++ &alloc_unbound);
++ if (err == -ENOSYS)
++ goto err;
++ BUG_ON(err);
++ xen_store_evtchn = xen_start_info->store_evtchn =
++ alloc_unbound.port;
++
++#if defined(CONFIG_PROC_FS) && defined(CONFIG_XEN_PRIVILEGED_GUEST)
++ /* And finally publish the above info in /proc/xen */
++ xsd_kva_intf = create_xen_proc_entry("xsd_kva", 0600);
++ if (xsd_kva_intf) {
++ memcpy(&xsd_kva_fops, xsd_kva_intf->proc_fops,
++ sizeof(xsd_kva_fops));
++ xsd_kva_fops.mmap = xsd_kva_mmap;
++ xsd_kva_intf->proc_fops = &xsd_kva_fops;
++ xsd_kva_intf->read_proc = xsd_kva_read;
++ }
++ xsd_port_intf = create_xen_proc_entry("xsd_port", 0400);
++ if (xsd_port_intf)
++ xsd_port_intf->read_proc = xsd_port_read;
++#endif
++ xen_store_interface = mfn_to_virt(xen_store_mfn);
+ } else {
+ xenstored_ready = 1;
++#ifdef CONFIG_XEN
+ xen_store_evtchn = xen_start_info->store_evtchn;
+ xen_store_mfn = xen_start_info->store_mfn;
++ xen_store_interface = mfn_to_virt(xen_store_mfn);
++#else
++ xen_store_evtchn = hvm_get_parameter(HVM_PARAM_STORE_EVTCHN);
++ xen_store_mfn = hvm_get_parameter(HVM_PARAM_STORE_PFN);
++ xen_store_interface = ioremap(xen_store_mfn << PAGE_SHIFT,
++ PAGE_SIZE);
++#endif
+ }
+- xen_store_interface = mfn_to_virt(xen_store_mfn);
++
++
++ xenbus_dev_init();
+
+ /* Initialize the interface to xenstore. */
+ err = xs_init();
+ if (err) {
+ printk(KERN_WARNING
+ "XENBUS: Error initializing xenstore comms: %i\n", err);
+- goto out_unreg_back;
++ goto err;
+ }
+
++ /* Register ourselves with the kernel device subsystem */
++ if (!xenbus_frontend.error) {
++ xenbus_frontend.error = device_register(&xenbus_frontend.dev);
++ if (xenbus_frontend.error) {
++ bus_unregister(&xenbus_frontend.bus);
++ printk(KERN_WARNING
++ "XENBUS: Error registering frontend device: %i\n",
++ xenbus_frontend.error);
++ }
++ }
++ xenbus_backend_device_register();
++
+ if (!is_initial_xendomain())
+ xenbus_probe(NULL);
+
+ return 0;
+
+- out_unreg_back:
+- xenbus_backend_bus_unregister();
++ err:
++ if (page)
++ free_page(page);
+
+- out_unreg_front:
+- bus_unregister(&xenbus_frontend.bus);
++ /*
++ * Do not unregister the xenbus front/backend buses here. The buses
++ * must exist because front/backend drivers will use them when they are
++ * registered.
++ */
+
+- out_error:
+ return err;
+ }
+
++#ifdef CONFIG_XEN
+ postcore_initcall(xenbus_probe_init);
+-
+-MODULE_LICENSE("GPL");
++MODULE_LICENSE("Dual BSD/GPL");
++#else
++int xenbus_init(void)
++{
++ return xenbus_probe_init();
++}
++#endif
+
+ static int is_disconnected_device(struct device *dev, void *data)
+ {
+@@ -883,12 +1040,14 @@ static int is_disconnected_device(struct
+ return 0;
+
+ xendrv = to_xenbus_driver(dev->driver);
+- return (xendev->state != XenbusStateConnected ||
++ return (xendev->state < XenbusStateConnected ||
+ (xendrv->is_ready && !xendrv->is_ready(xendev)));
+ }
+
+ static int exists_disconnected_device(struct device_driver *drv)
+ {
++ if (xenbus_frontend.error)
++ return xenbus_frontend.error;
+ return bus_for_each_dev(&xenbus_frontend.bus, NULL, drv,
+ is_disconnected_device);
+ }
+@@ -897,6 +1056,7 @@ static int print_device_status(struct de
+ {
+ struct xenbus_device *xendev = to_xenbus_device(dev);
+ struct device_driver *drv = data;
++ struct xenbus_driver *xendrv;
+
+ /* Is this operation limited to a particular driver? */
+ if (drv && (dev->driver != drv))
+@@ -906,12 +1066,23 @@ static int print_device_status(struct de
+ /* Information only: is this too noisy? */
+ printk(KERN_INFO "XENBUS: Device with no driver: %s\n",
+ xendev->nodename);
+- } else if (xendev->state != XenbusStateConnected) {
++ return 0;
++ }
++
++ if (xendev->state < XenbusStateConnected) {
++ enum xenbus_state rstate = XenbusStateUnknown;
++ if (xendev->otherend)
++ rstate = xenbus_read_driver_state(xendev->otherend);
+ printk(KERN_WARNING "XENBUS: Timeout connecting "
+- "to device: %s (state %d)\n",
+- xendev->nodename, xendev->state);
++ "to device: %s (local state %d, remote state %d)\n",
++ xendev->nodename, xendev->state, rstate);
+ }
+
++ xendrv = to_xenbus_driver(dev->driver);
++ if (xendrv->is_ready && !xendrv->is_ready(xendev))
++ printk(KERN_WARNING "XENBUS: Device not ready: %s\n",
++ xendev->nodename);
++
+ return 0;
+ }
+
+@@ -919,7 +1090,7 @@ static int print_device_status(struct de
+ static int ready_to_wait_for_devices;
+
+ /*
+- * On a 10 second timeout, wait for all devices currently configured. We need
++ * On a 5-minute timeout, wait for all devices currently configured. We need
+ * to do this to guarantee that the filesystems and / or network devices
+ * needed for boot are available, before we can allow the boot to proceed.
+ *
+@@ -934,18 +1105,30 @@ static int ready_to_wait_for_devices;
+ */
+ static void wait_for_devices(struct xenbus_driver *xendrv)
+ {
+- unsigned long timeout = jiffies + 10*HZ;
++ unsigned long start = jiffies;
+ struct device_driver *drv = xendrv ? &xendrv->driver : NULL;
++ unsigned int seconds_waited = 0;
+
+ if (!ready_to_wait_for_devices || !is_running_on_xen())
+ return;
+
+ while (exists_disconnected_device(drv)) {
+- if (time_after(jiffies, timeout))
+- break;
++ if (time_after(jiffies, start + (seconds_waited+5)*HZ)) {
++ if (!seconds_waited)
++ printk(KERN_WARNING "XENBUS: Waiting for "
++ "devices to initialise: ");
++ seconds_waited += 5;
++ printk("%us...", 300 - seconds_waited);
++ if (seconds_waited == 300)
++ break;
++ }
++
+ schedule_timeout_interruptible(HZ/10);
+ }
+
++ if (seconds_waited)
++ printk("\n");
++
+ bus_for_each_dev(&xenbus_frontend.bus, NULL, drv,
+ print_device_status);
+ }
+@@ -953,10 +1136,18 @@ static void wait_for_devices(struct xenb
+ #ifndef MODULE
+ static int __init boot_wait_for_devices(void)
+ {
+- ready_to_wait_for_devices = 1;
+- wait_for_devices(NULL);
++ if (!xenbus_frontend.error) {
++ ready_to_wait_for_devices = 1;
++ wait_for_devices(NULL);
++ }
+ return 0;
+ }
+
+ late_initcall(boot_wait_for_devices);
+ #endif
++
++int xenbus_for_each_frontend(void *arg, int (*fn)(struct device *, void *))
++{
++ return bus_for_each_dev(&xenbus_frontend.bus, NULL, arg, fn);
++}
++EXPORT_SYMBOL_GPL(xenbus_for_each_frontend);
+Index: head-2008-11-25/drivers/xen/xenbus/xenbus_probe.h
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/xenbus/xenbus_probe.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/xen/xenbus/xenbus_probe.h 2008-11-25 12:35:56.000000000 +0100
+@@ -34,41 +34,42 @@
+ #ifndef _XENBUS_PROBE_H
+ #define _XENBUS_PROBE_H
+
+-#ifdef CONFIG_XEN_BACKEND
++#if defined(CONFIG_XEN_BACKEND) || defined(CONFIG_XEN_BACKEND_MODULE)
+ extern void xenbus_backend_suspend(int (*fn)(struct device *, void *));
+ extern void xenbus_backend_resume(int (*fn)(struct device *, void *));
+ extern void xenbus_backend_probe_and_watch(void);
+-extern int xenbus_backend_bus_register(void);
+-extern void xenbus_backend_bus_unregister(void);
++extern void xenbus_backend_bus_register(void);
++extern void xenbus_backend_device_register(void);
+ #else
+ static inline void xenbus_backend_suspend(int (*fn)(struct device *, void *)) {}
+ static inline void xenbus_backend_resume(int (*fn)(struct device *, void *)) {}
+ static inline void xenbus_backend_probe_and_watch(void) {}
+-static inline int xenbus_backend_bus_register(void) { return 0; }
+-static inline void xenbus_backend_bus_unregister(void) {}
++static inline void xenbus_backend_bus_register(void) {}
++static inline void xenbus_backend_device_register(void) {}
+ #endif
+
+ struct xen_bus_type
+ {
+ char *root;
++ int error;
+ unsigned int levels;
+ int (*get_bus_id)(char bus_id[BUS_ID_SIZE], const char *nodename);
+ int (*probe)(const char *type, const char *dir);
+ struct bus_type bus;
++ struct device dev;
+ };
+
+ extern int xenbus_match(struct device *_dev, struct device_driver *_drv);
+ extern int xenbus_dev_probe(struct device *_dev);
+ extern int xenbus_dev_remove(struct device *_dev);
+ extern int xenbus_register_driver_common(struct xenbus_driver *drv,
+- struct xen_bus_type *bus,
+- struct module *owner,
+- const char *mod_name);
++ struct xen_bus_type *bus);
+ extern int xenbus_probe_node(struct xen_bus_type *bus,
+ const char *type,
+ const char *nodename);
+ extern int xenbus_probe_devices(struct xen_bus_type *bus);
+
+-extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
++extern void dev_changed(const char *node, struct xen_bus_type *bus);
+
+ #endif
++
+Index: head-2008-11-25/drivers/xen/xenbus/xenbus_xs.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/xenbus/xenbus_xs.c 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/drivers/xen/xenbus/xenbus_xs.c 2008-11-25 12:35:56.000000000 +0100
+@@ -47,6 +47,14 @@
+ #include <xen/xenbus.h>
+ #include "xenbus_comms.h"
+
++#ifdef HAVE_XEN_PLATFORM_COMPAT_H
++#include <xen/platform-compat.h>
++#endif
++
++#ifndef PF_NOFREEZE /* Old kernel (pre-2.6.6). */
++#define PF_NOFREEZE 0
++#endif
++
+ struct xs_stored_msg {
+ struct list_head list;
+
+@@ -108,7 +116,7 @@ static DEFINE_SPINLOCK(watch_events_lock
+ * carrying out work.
+ */
+ static pid_t xenwatch_pid;
+-static DEFINE_MUTEX(xenwatch_mutex);
++/* static */ DEFINE_MUTEX(xenwatch_mutex);
+ static DECLARE_WAIT_QUEUE_HEAD(watch_events_waitq);
+
+ static int get_error(const char *errorstring)
+@@ -177,7 +185,7 @@ void *xenbus_dev_request_and_reply(struc
+
+ mutex_unlock(&xs_state.request_mutex);
+
+- if ((msg->type == XS_TRANSACTION_END) ||
++ if ((req_msg.type == XS_TRANSACTION_END) ||
+ ((req_msg.type == XS_TRANSACTION_START) &&
+ (msg->type == XS_ERROR)))
+ up_read(&xs_state.transaction_mutex);
+@@ -213,7 +221,7 @@ static void *xs_talkv(struct xenbus_tran
+ }
+
+ for (i = 0; i < num_vecs; i++) {
+- err = xb_write(iovec[i].iov_base, iovec[i].iov_len);
++ err = xb_write(iovec[i].iov_base, iovec[i].iov_len);;
+ if (err) {
+ mutex_unlock(&xs_state.request_mutex);
+ return ERR_PTR(err);
+@@ -294,7 +302,7 @@ static char **split(char *strings, unsig
+ char *p, **ret;
+
+ /* Count the strings. */
+- *num = count_strings(strings, len);
++ *num = count_strings(strings, len) + 1;
+
+ /* Transfer to one big alloc for easy freeing. */
+ ret = kmalloc(*num * sizeof(char *) + len, GFP_NOIO | __GFP_HIGH);
+@@ -308,6 +316,7 @@ static char **split(char *strings, unsig
+ strings = (char *)&ret[*num];
+ for (p = strings, *num = 0; p < strings + len; p += strlen(p) + 1)
+ ret[(*num)++] = p;
++ ret[*num] = strings + len;
+
+ return ret;
+ }
+@@ -498,7 +507,7 @@ int xenbus_printf(struct xenbus_transact
+ #define PRINTF_BUFFER_SIZE 4096
+ char *printf_buffer;
+
+- printf_buffer = kmalloc(PRINTF_BUFFER_SIZE, GFP_KERNEL);
++ printf_buffer = kmalloc(PRINTF_BUFFER_SIZE, GFP_NOIO | __GFP_HIGH);
+ if (printf_buffer == NULL)
+ return -ENOMEM;
+
+@@ -621,6 +630,8 @@ void unregister_xenbus_watch(struct xenb
+ char token[sizeof(watch) * 2 + 1];
+ int err;
+
++ BUG_ON(watch->flags & XBWF_new_thread);
++
+ sprintf(token, "%lX", (long)watch);
+
+ down_read(&xs_state.watch_mutex);
+@@ -638,11 +649,6 @@ void unregister_xenbus_watch(struct xenb
+
+ up_read(&xs_state.watch_mutex);
+
+- /* Make sure there are no callbacks running currently (unless
+- its us) */
+- if (current->pid != xenwatch_pid)
+- mutex_lock(&xenwatch_mutex);
+-
+ /* Cancel pending watch events. */
+ spin_lock(&watch_events_lock);
+ list_for_each_entry_safe(msg, tmp, &watch_events, list) {
+@@ -654,8 +660,11 @@ void unregister_xenbus_watch(struct xenb
+ }
+ spin_unlock(&watch_events_lock);
+
+- if (current->pid != xenwatch_pid)
++ /* Flush any currently-executing callback, unless we are it. :-) */
++ if (current->pid != xenwatch_pid) {
++ mutex_lock(&xenwatch_mutex);
+ mutex_unlock(&xenwatch_mutex);
++ }
+ }
+ EXPORT_SYMBOL_GPL(unregister_xenbus_watch);
+
+@@ -693,11 +702,30 @@ void xs_suspend_cancel(void)
+ up_write(&xs_state.transaction_mutex);
+ }
+
++static int xenwatch_handle_callback(void *data)
++{
++ struct xs_stored_msg *msg = data;
++
++ msg->u.watch.handle->callback(msg->u.watch.handle,
++ (const char **)msg->u.watch.vec,
++ msg->u.watch.vec_size);
++
++ kfree(msg->u.watch.vec);
++ kfree(msg);
++
++ /* Kill this kthread if we were spawned just for this callback. */
++ if (current->pid != xenwatch_pid)
++ do_exit(0);
++
++ return 0;
++}
++
+ static int xenwatch_thread(void *unused)
+ {
+ struct list_head *ent;
+ struct xs_stored_msg *msg;
+
++ current->flags |= PF_NOFREEZE;
+ for (;;) {
+ wait_event_interruptible(watch_events_waitq,
+ !list_empty(&watch_events));
+@@ -713,17 +741,29 @@ static int xenwatch_thread(void *unused)
+ list_del(ent);
+ spin_unlock(&watch_events_lock);
+
+- if (ent != &watch_events) {
+- msg = list_entry(ent, struct xs_stored_msg, list);
+- msg->u.watch.handle->callback(
+- msg->u.watch.handle,
+- (const char **)msg->u.watch.vec,
+- msg->u.watch.vec_size);
+- kfree(msg->u.watch.vec);
+- kfree(msg);
++ if (ent == &watch_events) {
++ mutex_unlock(&xenwatch_mutex);
++ continue;
+ }
+
+- mutex_unlock(&xenwatch_mutex);
++ msg = list_entry(ent, struct xs_stored_msg, list);
++
++ /*
++ * Unlock the mutex before running an XBWF_new_thread
++ * handler. kthread_run can block which can deadlock
++ * against unregister_xenbus_watch() if we need to
++ * unregister other watches in order to make
++ * progress. This can occur on resume before the swap
++ * device is attached.
++ */
++ if (msg->u.watch.handle->flags & XBWF_new_thread) {
++ mutex_unlock(&xenwatch_mutex);
++ kthread_run(xenwatch_handle_callback,
++ msg, "xenwatch_cb");
++ } else {
++ xenwatch_handle_callback(msg);
++ mutex_unlock(&xenwatch_mutex);
++ }
+ }
+
+ return 0;
+@@ -817,6 +857,7 @@ static int xenbus_thread(void *unused)
+ {
+ int err;
+
++ current->flags |= PF_NOFREEZE;
+ for (;;) {
+ err = process_msg();
+ if (err)
+Index: head-2008-11-25/include/xen/balloon.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/balloon.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/balloon.h 2008-11-25 12:35:56.000000000 +0100
+@@ -31,12 +31,9 @@
+ * IN THE SOFTWARE.
+ */
+
+-#ifndef __XEN_BALLOON_H__
+-#define __XEN_BALLOON_H__
++#ifndef __ASM_BALLOON_H__
++#define __ASM_BALLOON_H__
+
+-#include <linux/spinlock.h>
+-
+-#if 0
+ /*
+ * Inform the balloon driver that it should allow some slop for device-driver
+ * memory activities.
+@@ -56,6 +53,5 @@ void balloon_release_driver_page(struct
+ extern spinlock_t balloon_lock;
+ #define balloon_lock(__flags) spin_lock_irqsave(&balloon_lock, __flags)
+ #define balloon_unlock(__flags) spin_unlock_irqrestore(&balloon_lock, __flags)
+-#endif
+
+-#endif /* __XEN_BALLOON_H__ */
++#endif /* __ASM_BALLOON_H__ */
+Index: head-2008-11-25/include/xen/interface/callback.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/callback.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/callback.h 2008-11-25 12:35:56.000000000 +0100
+@@ -86,6 +86,8 @@ struct callback_register {
+ uint16_t flags;
+ xen_callback_t address;
+ };
++typedef struct callback_register callback_register_t;
++DEFINE_XEN_GUEST_HANDLE(callback_register_t);
+
+ /*
+ * Unregister a callback.
+@@ -98,5 +100,22 @@ struct callback_unregister {
+ uint16_t type;
+ uint16_t _unused;
+ };
++typedef struct callback_unregister callback_unregister_t;
++DEFINE_XEN_GUEST_HANDLE(callback_unregister_t);
++
++#if __XEN_INTERFACE_VERSION__ < 0x00030207
++#undef CALLBACKTYPE_sysenter
++#define CALLBACKTYPE_sysenter CALLBACKTYPE_sysenter_deprecated
++#endif
+
+ #endif /* __XEN_PUBLIC_CALLBACK_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/elfnote.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/elfnote.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/elfnote.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,6 +3,24 @@
+ *
+ * Definitions used for the Xen ELF notes.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2006, Ian Campbell, XenSource Ltd.
+ */
+
+@@ -10,7 +28,7 @@
+ #define __XEN_PUBLIC_ELFNOTE_H__
+
+ /*
+- * The notes should live in a SHT_NOTE segment and have "Xen" in the
++ * The notes should live in a PT_NOTE segment and have "Xen" in the
+ * name field.
+ *
+ * Numeric types are either 4 or 8 bytes depending on the content of
+@@ -22,8 +40,6 @@
+
+ /*
+ * NAME=VALUE pair (string).
+- *
+- * LEGACY: FEATURES and PAE
+ */
+ #define XEN_ELFNOTE_INFO 0
+
+@@ -90,7 +106,12 @@
+ #define XEN_ELFNOTE_LOADER 8
+
+ /*
+- * The kernel supports PAE (x86/32 only, string = "yes" or "no").
++ * The kernel supports PAE (x86/32 only, string = "yes", "no" or
++ * "bimodal").
++ *
++ * For compatibility with Xen 3.0.3 and earlier the "bimodal" setting
++ * may be given as "yes,bimodal" which will cause older Xen to treat
++ * this kernel as PAE.
+ *
+ * LEGACY: PAE (n.b. The legacy interface included a provision to
+ * indicate 'extended-cr3' support allowing L3 page tables to be
+@@ -140,6 +161,65 @@
+ */
+ #define XEN_ELFNOTE_SUSPEND_CANCEL 14
+
++/*
++ * The number of the highest elfnote defined.
++ */
++#define XEN_ELFNOTE_MAX XEN_ELFNOTE_SUSPEND_CANCEL
++
++/*
++ * System information exported through crash notes.
++ *
++ * The kexec / kdump code will create one XEN_ELFNOTE_CRASH_INFO
++ * note in case of a system crash. This note will contain various
++ * information about the system, see xen/include/xen/elfcore.h.
++ */
++#define XEN_ELFNOTE_CRASH_INFO 0x1000001
++
++/*
++ * System registers exported through crash notes.
++ *
++ * The kexec / kdump code will create one XEN_ELFNOTE_CRASH_REGS
++ * note per cpu in case of a system crash. This note is architecture
++ * specific and will contain registers not saved in the "CORE" note.
++ * See xen/include/xen/elfcore.h for more information.
++ */
++#define XEN_ELFNOTE_CRASH_REGS 0x1000002
++
++
++/*
++ * xen dump-core none note.
++ * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_NONE
++ * in its dump file to indicate that the file is xen dump-core
++ * file. This note doesn't have any other information.
++ * See tools/libxc/xc_core.h for more information.
++ */
++#define XEN_ELFNOTE_DUMPCORE_NONE 0x2000000
++
++/*
++ * xen dump-core header note.
++ * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_HEADER
++ * in its dump file.
++ * See tools/libxc/xc_core.h for more information.
++ */
++#define XEN_ELFNOTE_DUMPCORE_HEADER 0x2000001
++
++/*
++ * xen dump-core xen version note.
++ * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_XEN_VERSION
++ * in its dump file. It contains the xen version obtained via the
++ * XENVER hypercall.
++ * See tools/libxc/xc_core.h for more information.
++ */
++#define XEN_ELFNOTE_DUMPCORE_XEN_VERSION 0x2000002
++
++/*
++ * xen dump-core format version note.
++ * xm dump-core code will create one XEN_ELFNOTE_DUMPCORE_FORMAT_VERSION
++ * in its dump file. It contains a format version identifier.
++ * See tools/libxc/xc_core.h for more information.
++ */
++#define XEN_ELFNOTE_DUMPCORE_FORMAT_VERSION 0x2000003
++
+ #endif /* __XEN_PUBLIC_ELFNOTE_H__ */
+
+ /*
+Index: head-2008-11-25/include/xen/interface/event_channel.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/event_channel.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/event_channel.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,14 +3,39 @@
+ *
+ * Event channels between domains.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2003-2004, K A Fraser.
+ */
+
+ #ifndef __XEN_PUBLIC_EVENT_CHANNEL_H__
+ #define __XEN_PUBLIC_EVENT_CHANNEL_H__
+
++/*
++ * Prototype for this hypercall is:
++ * int event_channel_op(int cmd, void *args)
++ * @cmd == EVTCHNOP_??? (event-channel operation).
++ * @args == Operation-specific extra arguments (NULL if none).
++ */
++
+ typedef uint32_t evtchn_port_t;
+-DEFINE_GUEST_HANDLE(evtchn_port_t);
++DEFINE_XEN_GUEST_HANDLE(evtchn_port_t);
+
+ /*
+ * EVTCHNOP_alloc_unbound: Allocate a port in domain <dom> and mark as
+@@ -20,13 +45,14 @@ DEFINE_GUEST_HANDLE(evtchn_port_t);
+ * 1. If the caller is unprivileged then <dom> must be DOMID_SELF.
+ * 2. <rdom> may be DOMID_SELF, allowing loopback connections.
+ */
+-#define EVTCHNOP_alloc_unbound 6
++#define EVTCHNOP_alloc_unbound 6
+ struct evtchn_alloc_unbound {
+- /* IN parameters */
+- domid_t dom, remote_dom;
+- /* OUT parameters */
+- evtchn_port_t port;
++ /* IN parameters */
++ domid_t dom, remote_dom;
++ /* OUT parameters */
++ evtchn_port_t port;
+ };
++typedef struct evtchn_alloc_unbound evtchn_alloc_unbound_t;
+
+ /*
+ * EVTCHNOP_bind_interdomain: Construct an interdomain event channel between
+@@ -39,29 +65,35 @@ struct evtchn_alloc_unbound {
+ */
+ #define EVTCHNOP_bind_interdomain 0
+ struct evtchn_bind_interdomain {
+- /* IN parameters. */
+- domid_t remote_dom;
+- evtchn_port_t remote_port;
+- /* OUT parameters. */
+- evtchn_port_t local_port;
++ /* IN parameters. */
++ domid_t remote_dom;
++ evtchn_port_t remote_port;
++ /* OUT parameters. */
++ evtchn_port_t local_port;
+ };
++typedef struct evtchn_bind_interdomain evtchn_bind_interdomain_t;
+
+ /*
+ * EVTCHNOP_bind_virq: Bind a local event channel to VIRQ <irq> on specified
+ * vcpu.
+ * NOTES:
+- * 1. A virtual IRQ may be bound to at most one event channel per vcpu.
+- * 2. The allocated event channel is bound to the specified vcpu. The binding
+- * may not be changed.
++ * 1. Virtual IRQs are classified as per-vcpu or global. See the VIRQ list
++ * in xen.h for the classification of each VIRQ.
++ * 2. Global VIRQs must be allocated on VCPU0 but can subsequently be
++ * re-bound via EVTCHNOP_bind_vcpu.
++ * 3. Per-vcpu VIRQs may be bound to at most one event channel per vcpu.
++ * The allocated event channel is bound to the specified vcpu and the
++ * binding cannot be changed.
+ */
+-#define EVTCHNOP_bind_virq 1
++#define EVTCHNOP_bind_virq 1
+ struct evtchn_bind_virq {
+- /* IN parameters. */
+- uint32_t virq;
+- uint32_t vcpu;
+- /* OUT parameters. */
+- evtchn_port_t port;
++ /* IN parameters. */
++ uint32_t virq;
++ uint32_t vcpu;
++ /* OUT parameters. */
++ evtchn_port_t port;
+ };
++typedef struct evtchn_bind_virq evtchn_bind_virq_t;
+
+ /*
+ * EVTCHNOP_bind_pirq: Bind a local event channel to PIRQ <irq>.
+@@ -69,15 +101,16 @@ struct evtchn_bind_virq {
+ * 1. A physical IRQ may be bound to at most one event channel per domain.
+ * 2. Only a sufficiently-privileged domain may bind to a physical IRQ.
+ */
+-#define EVTCHNOP_bind_pirq 2
++#define EVTCHNOP_bind_pirq 2
+ struct evtchn_bind_pirq {
+- /* IN parameters. */
+- uint32_t pirq;
++ /* IN parameters. */
++ uint32_t pirq;
+ #define BIND_PIRQ__WILL_SHARE 1
+- uint32_t flags; /* BIND_PIRQ__* */
+- /* OUT parameters. */
+- evtchn_port_t port;
++ uint32_t flags; /* BIND_PIRQ__* */
++ /* OUT parameters. */
++ evtchn_port_t port;
+ };
++typedef struct evtchn_bind_pirq evtchn_bind_pirq_t;
+
+ /*
+ * EVTCHNOP_bind_ipi: Bind a local event channel to receive events.
+@@ -85,33 +118,36 @@ struct evtchn_bind_pirq {
+ * 1. The allocated event channel is bound to the specified vcpu. The binding
+ * may not be changed.
+ */
+-#define EVTCHNOP_bind_ipi 7
++#define EVTCHNOP_bind_ipi 7
+ struct evtchn_bind_ipi {
+- uint32_t vcpu;
+- /* OUT parameters. */
+- evtchn_port_t port;
++ uint32_t vcpu;
++ /* OUT parameters. */
++ evtchn_port_t port;
+ };
++typedef struct evtchn_bind_ipi evtchn_bind_ipi_t;
+
+ /*
+ * EVTCHNOP_close: Close a local event channel <port>. If the channel is
+ * interdomain then the remote end is placed in the unbound state
+ * (EVTCHNSTAT_unbound), awaiting a new connection.
+ */
+-#define EVTCHNOP_close 3
++#define EVTCHNOP_close 3
+ struct evtchn_close {
+- /* IN parameters. */
+- evtchn_port_t port;
++ /* IN parameters. */
++ evtchn_port_t port;
+ };
++typedef struct evtchn_close evtchn_close_t;
+
+ /*
+ * EVTCHNOP_send: Send an event to the remote end of the channel whose local
+ * endpoint is <port>.
+ */
+-#define EVTCHNOP_send 4
++#define EVTCHNOP_send 4
+ struct evtchn_send {
+- /* IN parameters. */
+- evtchn_port_t port;
++ /* IN parameters. */
++ evtchn_port_t port;
+ };
++typedef struct evtchn_send evtchn_send_t;
+
+ /*
+ * EVTCHNOP_status: Get the current status of the communication channel which
+@@ -121,75 +157,108 @@ struct evtchn_send {
+ * 2. Only a sufficiently-privileged domain may obtain the status of an event
+ * channel for which <dom> is not DOMID_SELF.
+ */
+-#define EVTCHNOP_status 5
++#define EVTCHNOP_status 5
+ struct evtchn_status {
+- /* IN parameters */
+- domid_t dom;
+- evtchn_port_t port;
+- /* OUT parameters */
+-#define EVTCHNSTAT_closed 0 /* Channel is not in use. */
+-#define EVTCHNSTAT_unbound 1 /* Channel is waiting interdom connection.*/
+-#define EVTCHNSTAT_interdomain 2 /* Channel is connected to remote domain. */
+-#define EVTCHNSTAT_pirq 3 /* Channel is bound to a phys IRQ line. */
+-#define EVTCHNSTAT_virq 4 /* Channel is bound to a virtual IRQ line */
+-#define EVTCHNSTAT_ipi 5 /* Channel is bound to a virtual IPI line */
+- uint32_t status;
+- uint32_t vcpu; /* VCPU to which this channel is bound. */
+- union {
+- struct {
+- domid_t dom;
+- } unbound; /* EVTCHNSTAT_unbound */
+- struct {
+- domid_t dom;
+- evtchn_port_t port;
+- } interdomain; /* EVTCHNSTAT_interdomain */
+- uint32_t pirq; /* EVTCHNSTAT_pirq */
+- uint32_t virq; /* EVTCHNSTAT_virq */
+- } u;
++ /* IN parameters */
++ domid_t dom;
++ evtchn_port_t port;
++ /* OUT parameters */
++#define EVTCHNSTAT_closed 0 /* Channel is not in use. */
++#define EVTCHNSTAT_unbound 1 /* Channel is waiting interdom connection.*/
++#define EVTCHNSTAT_interdomain 2 /* Channel is connected to remote domain. */
++#define EVTCHNSTAT_pirq 3 /* Channel is bound to a phys IRQ line. */
++#define EVTCHNSTAT_virq 4 /* Channel is bound to a virtual IRQ line */
++#define EVTCHNSTAT_ipi 5 /* Channel is bound to a virtual IPI line */
++ uint32_t status;
++ uint32_t vcpu; /* VCPU to which this channel is bound. */
++ union {
++ struct {
++ domid_t dom;
++ } unbound; /* EVTCHNSTAT_unbound */
++ struct {
++ domid_t dom;
++ evtchn_port_t port;
++ } interdomain; /* EVTCHNSTAT_interdomain */
++ uint32_t pirq; /* EVTCHNSTAT_pirq */
++ uint32_t virq; /* EVTCHNSTAT_virq */
++ } u;
+ };
++typedef struct evtchn_status evtchn_status_t;
+
+ /*
+ * EVTCHNOP_bind_vcpu: Specify which vcpu a channel should notify when an
+ * event is pending.
+ * NOTES:
+- * 1. IPI- and VIRQ-bound channels always notify the vcpu that initialised
+- * the binding. This binding cannot be changed.
+- * 2. All other channels notify vcpu0 by default. This default is set when
++ * 1. IPI-bound channels always notify the vcpu specified at bind time.
++ * This binding cannot be changed.
++ * 2. Per-VCPU VIRQ channels always notify the vcpu specified at bind time.
++ * This binding cannot be changed.
++ * 3. All other channels notify vcpu0 by default. This default is set when
+ * the channel is allocated (a port that is freed and subsequently reused
+ * has its binding reset to vcpu0).
+ */
+-#define EVTCHNOP_bind_vcpu 8
++#define EVTCHNOP_bind_vcpu 8
+ struct evtchn_bind_vcpu {
+- /* IN parameters. */
+- evtchn_port_t port;
+- uint32_t vcpu;
++ /* IN parameters. */
++ evtchn_port_t port;
++ uint32_t vcpu;
+ };
++typedef struct evtchn_bind_vcpu evtchn_bind_vcpu_t;
+
+ /*
+ * EVTCHNOP_unmask: Unmask the specified local event-channel port and deliver
+ * a notification to the appropriate VCPU if an event is pending.
+ */
+-#define EVTCHNOP_unmask 9
++#define EVTCHNOP_unmask 9
+ struct evtchn_unmask {
+- /* IN parameters. */
+- evtchn_port_t port;
++ /* IN parameters. */
++ evtchn_port_t port;
++};
++typedef struct evtchn_unmask evtchn_unmask_t;
++
++/*
++ * EVTCHNOP_reset: Close all event channels associated with specified domain.
++ * NOTES:
++ * 1. <dom> may be specified as DOMID_SELF.
++ * 2. Only a sufficiently-privileged domain may specify other than DOMID_SELF.
++ */
++#define EVTCHNOP_reset 10
++struct evtchn_reset {
++ /* IN parameters. */
++ domid_t dom;
+ };
++typedef struct evtchn_reset evtchn_reset_t;
+
++/*
++ * Argument to event_channel_op_compat() hypercall. Superceded by new
++ * event_channel_op() hypercall since 0x00030202.
++ */
+ struct evtchn_op {
+- uint32_t cmd; /* EVTCHNOP_* */
+- union {
+- struct evtchn_alloc_unbound alloc_unbound;
+- struct evtchn_bind_interdomain bind_interdomain;
+- struct evtchn_bind_virq bind_virq;
+- struct evtchn_bind_pirq bind_pirq;
+- struct evtchn_bind_ipi bind_ipi;
+- struct evtchn_close close;
+- struct evtchn_send send;
+- struct evtchn_status status;
+- struct evtchn_bind_vcpu bind_vcpu;
+- struct evtchn_unmask unmask;
+- } u;
++ uint32_t cmd; /* EVTCHNOP_* */
++ union {
++ struct evtchn_alloc_unbound alloc_unbound;
++ struct evtchn_bind_interdomain bind_interdomain;
++ struct evtchn_bind_virq bind_virq;
++ struct evtchn_bind_pirq bind_pirq;
++ struct evtchn_bind_ipi bind_ipi;
++ struct evtchn_close close;
++ struct evtchn_send send;
++ struct evtchn_status status;
++ struct evtchn_bind_vcpu bind_vcpu;
++ struct evtchn_unmask unmask;
++ } u;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(evtchn_op);
++typedef struct evtchn_op evtchn_op_t;
++DEFINE_XEN_GUEST_HANDLE(evtchn_op_t);
+
+ #endif /* __XEN_PUBLIC_EVENT_CHANNEL_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/features.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/features.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/features.h 2008-11-25 12:22:34.000000000 +0100
+@@ -3,6 +3,24 @@
+ *
+ * Feature flags, reported by XENVER_get_features.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2006, Keir Fraser <keir@xensource.com>
+ */
+
+@@ -41,6 +59,25 @@
+ /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */
+ #define XENFEAT_mmu_pt_update_preserve_ad 5
+
++/* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */
++#define XENFEAT_highmem_assist 6
++
++/*
++ * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel
++ * available pte bits.
++ */
++#define XENFEAT_gnttab_map_avail_bits 7
++
+ #define XENFEAT_NR_SUBMAPS 1
+
+ #endif /* __XEN_PUBLIC_FEATURES_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/grant_table.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/grant_table.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/grant_table.h 2008-11-25 12:22:34.000000000 +0100
+@@ -100,6 +100,7 @@ struct grant_entry {
+ */
+ uint32_t frame;
+ };
++typedef struct grant_entry grant_entry_t;
+
+ /*
+ * Type of grant entry.
+@@ -118,6 +119,7 @@ struct grant_entry {
+ * GTF_readonly: Restrict @domid to read-only mappings and accesses. [GST]
+ * GTF_reading: Grant entry is currently mapped for reading by @domid. [XEN]
+ * GTF_writing: Grant entry is currently mapped for writing by @domid. [XEN]
++ * GTF_PAT, GTF_PWT, GTF_PCD: (x86) cache attribute flags for the grant [GST]
+ */
+ #define _GTF_readonly (2)
+ #define GTF_readonly (1U<<_GTF_readonly)
+@@ -125,6 +127,12 @@ struct grant_entry {
+ #define GTF_reading (1U<<_GTF_reading)
+ #define _GTF_writing (4)
+ #define GTF_writing (1U<<_GTF_writing)
++#define _GTF_PWT (5)
++#define GTF_PWT (1U<<_GTF_PWT)
++#define _GTF_PCD (6)
++#define GTF_PCD (1U<<_GTF_PCD)
++#define _GTF_PAT (7)
++#define GTF_PAT (1U<<_GTF_PAT)
+
+ /*
+ * Subflags for GTF_accept_transfer:
+@@ -185,7 +193,8 @@ struct gnttab_map_grant_ref {
+ grant_handle_t handle;
+ uint64_t dev_bus_addr;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(gnttab_map_grant_ref);
++typedef struct gnttab_map_grant_ref gnttab_map_grant_ref_t;
++DEFINE_XEN_GUEST_HANDLE(gnttab_map_grant_ref_t);
+
+ /*
+ * GNTTABOP_unmap_grant_ref: Destroy one or more grant-reference mappings
+@@ -207,7 +216,8 @@ struct gnttab_unmap_grant_ref {
+ /* OUT parameters. */
+ int16_t status; /* GNTST_* */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_grant_ref);
++typedef struct gnttab_unmap_grant_ref gnttab_unmap_grant_ref_t;
++DEFINE_XEN_GUEST_HANDLE(gnttab_unmap_grant_ref_t);
+
+ /*
+ * GNTTABOP_setup_table: Set up a grant table for <dom> comprising at least
+@@ -225,9 +235,10 @@ struct gnttab_setup_table {
+ uint32_t nr_frames;
+ /* OUT parameters. */
+ int16_t status; /* GNTST_* */
+- GUEST_HANDLE(ulong) frame_list;
++ XEN_GUEST_HANDLE(ulong) frame_list;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(gnttab_setup_table);
++typedef struct gnttab_setup_table gnttab_setup_table_t;
++DEFINE_XEN_GUEST_HANDLE(gnttab_setup_table_t);
+
+ /*
+ * GNTTABOP_dump_table: Dump the contents of the grant table to the
+@@ -240,7 +251,8 @@ struct gnttab_dump_table {
+ /* OUT parameters. */
+ int16_t status; /* GNTST_* */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(gnttab_dump_table);
++typedef struct gnttab_dump_table gnttab_dump_table_t;
++DEFINE_XEN_GUEST_HANDLE(gnttab_dump_table_t);
+
+ /*
+ * GNTTABOP_transfer_grant_ref: Transfer <frame> to a foreign domain. The
+@@ -253,13 +265,15 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_dump_t
+ #define GNTTABOP_transfer 4
+ struct gnttab_transfer {
+ /* IN parameters. */
+- unsigned long mfn;
++ xen_pfn_t mfn;
+ domid_t domid;
+ grant_ref_t ref;
+ /* OUT parameters. */
+ int16_t status;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(gnttab_transfer);
++typedef struct gnttab_transfer gnttab_transfer_t;
++DEFINE_XEN_GUEST_HANDLE(gnttab_transfer_t);
++
+
+ /*
+ * GNTTABOP_copy: Hypervisor based copy
+@@ -285,22 +299,22 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_transf
+ #define GNTCOPY_dest_gref (1<<_GNTCOPY_dest_gref)
+
+ #define GNTTABOP_copy 5
+-struct gnttab_copy {
+- /* IN parameters. */
+- struct {
+- union {
+- grant_ref_t ref;
+- unsigned long gmfn;
+- } u;
+- domid_t domid;
+- uint16_t offset;
+- } source, dest;
+- uint16_t len;
+- uint16_t flags; /* GNTCOPY_* */
+- /* OUT parameters. */
+- int16_t status;
+-};
+-DEFINE_GUEST_HANDLE_STRUCT(gnttab_copy);
++typedef struct gnttab_copy {
++ /* IN parameters. */
++ struct {
++ union {
++ grant_ref_t ref;
++ xen_pfn_t gmfn;
++ } u;
++ domid_t domid;
++ uint16_t offset;
++ } source, dest;
++ uint16_t len;
++ uint16_t flags; /* GNTCOPY_* */
++ /* OUT parameters. */
++ int16_t status;
++} gnttab_copy_t;
++DEFINE_XEN_GUEST_HANDLE(gnttab_copy_t);
+
+ /*
+ * GNTTABOP_query_size: Query the current and maximum sizes of the shared
+@@ -318,10 +332,35 @@ struct gnttab_query_size {
+ uint32_t max_nr_frames;
+ int16_t status; /* GNTST_* */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_size);
++typedef struct gnttab_query_size gnttab_query_size_t;
++DEFINE_XEN_GUEST_HANDLE(gnttab_query_size_t);
+
+ /*
+- * Bitfield values for update_pin_status.flags.
++ * GNTTABOP_unmap_and_replace: Destroy one or more grant-reference mappings
++ * tracked by <handle> but atomically replace the page table entry with one
++ * pointing to the machine address under <new_addr>. <new_addr> will be
++ * redirected to the null entry.
++ * NOTES:
++ * 1. The call may fail in an undefined manner if either mapping is not
++ * tracked by <handle>.
++ * 2. After executing a batch of unmaps, it is guaranteed that no stale
++ * mappings will remain in the device or host TLBs.
++ */
++#define GNTTABOP_unmap_and_replace 7
++struct gnttab_unmap_and_replace {
++ /* IN parameters. */
++ uint64_t host_addr;
++ uint64_t new_addr;
++ grant_handle_t handle;
++ /* OUT parameters. */
++ int16_t status; /* GNTST_* */
++};
++typedef struct gnttab_unmap_and_replace gnttab_unmap_and_replace_t;
++DEFINE_XEN_GUEST_HANDLE(gnttab_unmap_and_replace_t);
++
++
++/*
++ * Bitfield values for gnttab_map_grant_ref.flags.
+ */
+ /* Map the grant entry for access by I/O devices. */
+ #define _GNTMAP_device_map (0)
+@@ -349,6 +388,13 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_
+ #define GNTMAP_contains_pte (1<<_GNTMAP_contains_pte)
+
+ /*
++ * Bits to be placed in guest kernel available PTE bits (architecture
++ * dependent; only supported when XENFEAT_gnttab_map_avail_bits is set).
++ */
++#define _GNTMAP_guest_avail0 (16)
++#define GNTMAP_guest_avail_mask ((uint32_t)~0 << _GNTMAP_guest_avail0)
++
++/*
+ * Values for error status returns. All errors are -ve.
+ */
+ #define GNTST_okay (0) /* Normal return. */
+@@ -361,7 +407,8 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_
+ #define GNTST_no_device_space (-7) /* Out of space in I/O MMU. */
+ #define GNTST_permission_denied (-8) /* Not enough privilege for operation. */
+ #define GNTST_bad_page (-9) /* Specified page was invalid for op. */
+-#define GNTST_bad_copy_arg (-10) /* copy arguments cross page boundary */
++#define GNTST_bad_copy_arg (-10) /* copy arguments cross page boundary. */
++#define GNTST_address_too_big (-11) /* transfer page address too large. */
+
+ #define GNTTABOP_error_msgs { \
+ "okay", \
+@@ -374,7 +421,18 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_
+ "no spare translation slot in the I/O MMU", \
+ "permission denied", \
+ "bad page", \
+- "copy arguments cross page boundary" \
++ "copy arguments cross page boundary", \
++ "page address size too large" \
+ }
+
+ #endif /* __XEN_PUBLIC_GRANT_TABLE_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/blkif.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/blkif.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/blkif.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,6 +3,24 @@
+ *
+ * Unified block-device I/O interface for Xen guest OSes.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2003-2004, Keir Fraser
+ */
+
+@@ -24,8 +42,10 @@
+ * rsp_event appropriately (e.g., using RING_FINAL_CHECK_FOR_RESPONSES()).
+ */
+
+-typedef uint16_t blkif_vdev_t;
+-typedef uint64_t blkif_sector_t;
++#ifndef blkif_vdev_t
++#define blkif_vdev_t uint16_t
++#endif
++#define blkif_sector_t uint64_t
+
+ /*
+ * REQUEST CODES.
+@@ -34,7 +54,7 @@ typedef uint64_t blkif_sector_t;
+ #define BLKIF_OP_WRITE 1
+ /*
+ * Recognised only if "feature-barrier" is present in backend xenbus info.
+- * The "feature_barrier" node contains a boolean indicating whether barrier
++ * The "feature-barrier" node contains a boolean indicating whether barrier
+ * requests are likely to succeed or fail. Either way, a barrier request
+ * may fail at any time with BLKIF_RSP_EOPNOTSUPP if it is unsupported by
+ * the underlying block-device hardware. The boolean simply indicates whether
+@@ -43,33 +63,50 @@ typedef uint64_t blkif_sector_t;
+ * create the "feature-barrier" node!
+ */
+ #define BLKIF_OP_WRITE_BARRIER 2
++/*
++ * Recognised if "feature-flush-cache" is present in backend xenbus
++ * info. A flush will ask the underlying storage hardware to flush its
++ * non-volatile caches as appropriate. The "feature-flush-cache" node
++ * contains a boolean indicating whether flush requests are likely to
++ * succeed or fail. Either way, a flush request may fail at any time
++ * with BLKIF_RSP_EOPNOTSUPP if it is unsupported by the underlying
++ * block-device hardware. The boolean simply indicates whether or not it
++ * is worthwhile for the frontend to attempt flushes. If a backend does
++ * not recognise BLKIF_OP_WRITE_FLUSH_CACHE, it should *not* create the
++ * "feature-flush-cache" node!
++ */
++#define BLKIF_OP_FLUSH_DISKCACHE 3
+
+ /*
+ * Maximum scatter/gather segments per request.
+- * This is carefully chosen so that sizeof(struct blkif_ring) <= PAGE_SIZE.
++ * This is carefully chosen so that sizeof(blkif_ring_t) <= PAGE_SIZE.
+ * NB. This could be 12 if the ring indexes weren't stored in the same page.
+ */
+ #define BLKIF_MAX_SEGMENTS_PER_REQUEST 11
+
++struct blkif_request_segment {
++ grant_ref_t gref; /* reference to I/O buffer frame */
++ /* @first_sect: first sector in frame to transfer (inclusive). */
++ /* @last_sect: last sector in frame to transfer (inclusive). */
++ uint8_t first_sect, last_sect;
++};
++
+ struct blkif_request {
+- uint8_t operation; /* BLKIF_OP_??? */
+- uint8_t nr_segments; /* number of segments */
+- blkif_vdev_t handle; /* only for read/write requests */
+- uint64_t id; /* private guest value, echoed in resp */
+- blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */
+- struct blkif_request_segment {
+- grant_ref_t gref; /* reference to I/O buffer frame */
+- /* @first_sect: first sector in frame to transfer (inclusive). */
+- /* @last_sect: last sector in frame to transfer (inclusive). */
+- uint8_t first_sect, last_sect;
+- } seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
++ uint8_t operation; /* BLKIF_OP_??? */
++ uint8_t nr_segments; /* number of segments */
++ blkif_vdev_t handle; /* only for read/write requests */
++ uint64_t id; /* private guest value, echoed in resp */
++ blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */
++ struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
+ };
++typedef struct blkif_request blkif_request_t;
+
+ struct blkif_response {
+- uint64_t id; /* copied from request */
+- uint8_t operation; /* copied from request */
+- int16_t status; /* BLKIF_RSP_??? */
++ uint64_t id; /* copied from request */
++ uint8_t operation; /* copied from request */
++ int16_t status; /* BLKIF_RSP_??? */
+ };
++typedef struct blkif_response blkif_response_t;
+
+ /*
+ * STATUS RETURN CODES.
+@@ -92,3 +129,13 @@ DEFINE_RING_TYPES(blkif, struct blkif_re
+ #define VDISK_READONLY 0x4
+
+ #endif /* __XEN_PUBLIC_IO_BLKIF_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/console.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/console.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/console.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,6 +3,24 @@
+ *
+ * Console I/O interface for Xen guest OSes.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2005, Keir Fraser
+ */
+
+@@ -21,3 +39,13 @@ struct xencons_interface {
+ };
+
+ #endif /* __XEN_PUBLIC_IO_CONSOLE_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/fbif.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/fbif.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/fbif.h 2008-11-25 12:35:56.000000000 +0100
+@@ -41,12 +41,13 @@
+ */
+ #define XENFB_TYPE_UPDATE 2
+
+-struct xenfb_update {
+- uint8_t type; /* XENFB_TYPE_UPDATE */
+- int32_t x; /* source x */
+- int32_t y; /* source y */
+- int32_t width; /* rect width */
+- int32_t height; /* rect height */
++struct xenfb_update
++{
++ uint8_t type; /* XENFB_TYPE_UPDATE */
++ int32_t x; /* source x */
++ int32_t y; /* source y */
++ int32_t width; /* rect width */
++ int32_t height; /* rect height */
+ };
+
+ /*
+@@ -55,36 +56,58 @@ struct xenfb_update {
+ */
+ #define XENFB_TYPE_RESIZE 3
+
+-struct xenfb_resize {
+- uint8_t type; /* XENFB_TYPE_RESIZE */
+- int32_t width; /* width in pixels */
+- int32_t height; /* height in pixels */
+- int32_t stride; /* stride in bytes */
+- int32_t depth; /* depth in bits */
+- int32_t offset; /* start offset within framebuffer */
++struct xenfb_resize
++{
++ uint8_t type; /* XENFB_TYPE_RESIZE */
++ int32_t width; /* width in pixels */
++ int32_t height; /* height in pixels */
++ int32_t stride; /* stride in bytes */
++ int32_t depth; /* depth in bits */
++ int32_t offset; /* offset of the framebuffer in bytes */
+ };
+
+ #define XENFB_OUT_EVENT_SIZE 40
+
+-union xenfb_out_event {
+- uint8_t type;
+- struct xenfb_update update;
+- struct xenfb_resize resize;
+- char pad[XENFB_OUT_EVENT_SIZE];
++union xenfb_out_event
++{
++ uint8_t type;
++ struct xenfb_update update;
++ struct xenfb_resize resize;
++ char pad[XENFB_OUT_EVENT_SIZE];
+ };
+
+ /* In events (backend -> frontend) */
+
+ /*
+ * Frontends should ignore unknown in events.
+- * No in events currently defined.
+ */
+
++/*
++ * Framebuffer refresh period advice
++ * Backend sends it to advise the frontend their preferred period of
++ * refresh. Frontends that keep the framebuffer constantly up-to-date
++ * just ignore it. Frontends that use the advice should immediately
++ * refresh the framebuffer (and send an update notification event if
++ * those have been requested), then use the update frequency to guide
++ * their periodical refreshs.
++ */
++#define XENFB_TYPE_REFRESH_PERIOD 1
++#define XENFB_NO_REFRESH 0
++
++struct xenfb_refresh_period
++{
++ uint8_t type; /* XENFB_TYPE_UPDATE_PERIOD */
++ uint32_t period; /* period of refresh, in ms,
++ * XENFB_NO_REFRESH if no refresh is needed */
++};
++
+ #define XENFB_IN_EVENT_SIZE 40
+
+-union xenfb_in_event {
+- uint8_t type;
+- char pad[XENFB_IN_EVENT_SIZE];
++union xenfb_in_event
++{
++ uint8_t type;
++ struct xenfb_refresh_period refresh_period;
++ char pad[XENFB_IN_EVENT_SIZE];
+ };
+
+ /* shared page */
+@@ -93,41 +116,41 @@ union xenfb_in_event {
+ #define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE)
+ #define XENFB_IN_RING_OFFS 1024
+ #define XENFB_IN_RING(page) \
+- ((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS))
++ ((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS))
+ #define XENFB_IN_RING_REF(page, idx) \
+- (XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN])
++ (XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN])
+
+ #define XENFB_OUT_RING_SIZE 2048
+ #define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE)
+ #define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE)
+ #define XENFB_OUT_RING(page) \
+- ((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS))
++ ((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS))
+ #define XENFB_OUT_RING_REF(page, idx) \
+- (XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN])
++ (XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN])
+
+-struct xenfb_page {
+- uint32_t in_cons, in_prod;
+- uint32_t out_cons, out_prod;
+-
+- int32_t width; /* width of the framebuffer (in pixels) */
+- int32_t height; /* height of the framebuffer (in pixels) */
+- uint32_t line_length; /* length of a row of pixels (in bytes) */
+- uint32_t mem_length; /* length of the framebuffer (in bytes) */
+- uint8_t depth; /* depth of a pixel (in bits) */
+-
+- /*
+- * Framebuffer page directory
+- *
+- * Each directory page holds PAGE_SIZE / sizeof(*pd)
+- * framebuffer pages, and can thus map up to PAGE_SIZE *
+- * PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and
+- * sizeof(unsigned long) == 4/8, that's 4 Megs 32 bit and 2
+- * Megs 64 bit. 256 directories give enough room for a 512
+- * Meg framebuffer with a max resolution of 12,800x10,240.
+- * Should be enough for a while with room leftover for
+- * expansion.
+- */
+- unsigned long pd[256];
++struct xenfb_page
++{
++ uint32_t in_cons, in_prod;
++ uint32_t out_cons, out_prod;
++
++ int32_t width; /* the width of the framebuffer (in pixels) */
++ int32_t height; /* the height of the framebuffer (in pixels) */
++ uint32_t line_length; /* the length of a row of pixels (in bytes) */
++ uint32_t mem_length; /* the length of the framebuffer (in bytes) */
++ uint8_t depth; /* the depth of a pixel (in bits) */
++
++ /*
++ * Framebuffer page directory
++ *
++ * Each directory page holds PAGE_SIZE / sizeof(*pd)
++ * framebuffer pages, and can thus map up to PAGE_SIZE *
++ * PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and
++ * sizeof(unsigned long) == 4/8, that's 4 Megs 32 bit and 2 Megs
++ * 64 bit. 256 directories give enough room for a 512 Meg
++ * framebuffer with a max resolution of 12,800x10,240. Should
++ * be enough for a while with room leftover for expansion.
++ */
++ unsigned long pd[256];
+ };
+
+ /*
+@@ -141,3 +164,13 @@ struct xenfb_page {
+ #endif
+
+ #endif
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/kbdif.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/kbdif.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/kbdif.h 2008-11-25 12:35:56.000000000 +0100
+@@ -45,34 +45,38 @@
+ */
+ #define XENKBD_TYPE_POS 4
+
+-struct xenkbd_motion {
+- uint8_t type; /* XENKBD_TYPE_MOTION */
+- int32_t rel_x; /* relative X motion */
+- int32_t rel_y; /* relative Y motion */
+- int32_t rel_z; /* relative Z motion (wheel) */
+-};
+-
+-struct xenkbd_key {
+- uint8_t type; /* XENKBD_TYPE_KEY */
+- uint8_t pressed; /* 1 if pressed; 0 otherwise */
+- uint32_t keycode; /* KEY_* from linux/input.h */
+-};
+-
+-struct xenkbd_position {
+- uint8_t type; /* XENKBD_TYPE_POS */
+- int32_t abs_x; /* absolute X position (in FB pixels) */
+- int32_t abs_y; /* absolute Y position (in FB pixels) */
+- int32_t rel_z; /* relative Z motion (wheel) */
++struct xenkbd_motion
++{
++ uint8_t type; /* XENKBD_TYPE_MOTION */
++ int32_t rel_x; /* relative X motion */
++ int32_t rel_y; /* relative Y motion */
++ int32_t rel_z; /* relative Z motion (wheel) */
++};
++
++struct xenkbd_key
++{
++ uint8_t type; /* XENKBD_TYPE_KEY */
++ uint8_t pressed; /* 1 if pressed; 0 otherwise */
++ uint32_t keycode; /* KEY_* from linux/input.h */
++};
++
++struct xenkbd_position
++{
++ uint8_t type; /* XENKBD_TYPE_POS */
++ int32_t abs_x; /* absolute X position (in FB pixels) */
++ int32_t abs_y; /* absolute Y position (in FB pixels) */
++ int32_t rel_z; /* relative Z motion (wheel) */
+ };
+
+ #define XENKBD_IN_EVENT_SIZE 40
+
+-union xenkbd_in_event {
+- uint8_t type;
+- struct xenkbd_motion motion;
+- struct xenkbd_key key;
+- struct xenkbd_position pos;
+- char pad[XENKBD_IN_EVENT_SIZE];
++union xenkbd_in_event
++{
++ uint8_t type;
++ struct xenkbd_motion motion;
++ struct xenkbd_key key;
++ struct xenkbd_position pos;
++ char pad[XENKBD_IN_EVENT_SIZE];
+ };
+
+ /* Out events (frontend -> backend) */
+@@ -85,9 +89,10 @@ union xenkbd_in_event {
+
+ #define XENKBD_OUT_EVENT_SIZE 40
+
+-union xenkbd_out_event {
+- uint8_t type;
+- char pad[XENKBD_OUT_EVENT_SIZE];
++union xenkbd_out_event
++{
++ uint8_t type;
++ char pad[XENKBD_OUT_EVENT_SIZE];
+ };
+
+ /* shared page */
+@@ -96,21 +101,32 @@ union xenkbd_out_event {
+ #define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
+ #define XENKBD_IN_RING_OFFS 1024
+ #define XENKBD_IN_RING(page) \
+- ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
++ ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
+ #define XENKBD_IN_RING_REF(page, idx) \
+- (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
++ (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
+
+ #define XENKBD_OUT_RING_SIZE 1024
+ #define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
+ #define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
+ #define XENKBD_OUT_RING(page) \
+- ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
++ ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
+ #define XENKBD_OUT_RING_REF(page, idx) \
+- (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
++ (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
+
+-struct xenkbd_page {
+- uint32_t in_cons, in_prod;
+- uint32_t out_cons, out_prod;
++struct xenkbd_page
++{
++ uint32_t in_cons, in_prod;
++ uint32_t out_cons, out_prod;
+ };
+
+ #endif
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/netif.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/netif.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/netif.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,6 +3,24 @@
+ *
+ * Unified network-device I/O interface for Xen guest OSes.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2003-2004, Keir Fraser
+ */
+
+@@ -47,18 +65,21 @@
+ #define _NETTXF_extra_info (3)
+ #define NETTXF_extra_info (1U<<_NETTXF_extra_info)
+
+-struct xen_netif_tx_request {
++struct netif_tx_request {
+ grant_ref_t gref; /* Reference to buffer page */
+ uint16_t offset; /* Offset within buffer page */
+ uint16_t flags; /* NETTXF_* */
+ uint16_t id; /* Echoed in response message. */
+ uint16_t size; /* Packet size in bytes. */
+ };
++typedef struct netif_tx_request netif_tx_request_t;
+
+ /* Types of netif_extra_info descriptors. */
+-#define XEN_NETIF_EXTRA_TYPE_NONE (0) /* Never used - invalid */
+-#define XEN_NETIF_EXTRA_TYPE_GSO (1) /* u.gso */
+-#define XEN_NETIF_EXTRA_TYPE_MAX (2)
++#define XEN_NETIF_EXTRA_TYPE_NONE (0) /* Never used - invalid */
++#define XEN_NETIF_EXTRA_TYPE_GSO (1) /* u.gso */
++#define XEN_NETIF_EXTRA_TYPE_MCAST_ADD (2) /* u.mcast */
++#define XEN_NETIF_EXTRA_TYPE_MCAST_DEL (3) /* u.mcast */
++#define XEN_NETIF_EXTRA_TYPE_MAX (4)
+
+ /* netif_extra_info flags. */
+ #define _XEN_NETIF_EXTRA_FLAG_MORE (0)
+@@ -71,49 +92,68 @@ struct xen_netif_tx_request {
+ * This structure needs to fit within both netif_tx_request and
+ * netif_rx_response for compatibility.
+ */
+-struct xen_netif_extra_info {
+- uint8_t type; /* XEN_NETIF_EXTRA_TYPE_* */
+- uint8_t flags; /* XEN_NETIF_EXTRA_FLAG_* */
+-
+- union {
+- struct {
+- /*
+- * Maximum payload size of each segment. For
+- * example, for TCP this is just the path MSS.
+- */
+- uint16_t size;
+-
+- /*
+- * GSO type. This determines the protocol of
+- * the packet and any extra features required
+- * to segment the packet properly.
+- */
+- uint8_t type; /* XEN_NETIF_GSO_TYPE_* */
+-
+- /* Future expansion. */
+- uint8_t pad;
+-
+- /*
+- * GSO features. This specifies any extra GSO
+- * features required to process this packet,
+- * such as ECN support for TCPv4.
+- */
+- uint16_t features; /* XEN_NETIF_GSO_FEAT_* */
+- } gso;
++struct netif_extra_info {
++ uint8_t type; /* XEN_NETIF_EXTRA_TYPE_* */
++ uint8_t flags; /* XEN_NETIF_EXTRA_FLAG_* */
++
++ union {
++ /*
++ * XEN_NETIF_EXTRA_TYPE_GSO:
++ */
++ struct {
++ /*
++ * Maximum payload size of each segment. For example, for TCP this
++ * is just the path MSS.
++ */
++ uint16_t size;
++
++ /*
++ * GSO type. This determines the protocol of the packet and any
++ * extra features required to segment the packet properly.
++ */
++ uint8_t type; /* XEN_NETIF_GSO_TYPE_* */
++
++ /* Future expansion. */
++ uint8_t pad;
++
++ /*
++ * GSO features. This specifies any extra GSO features required
++ * to process this packet, such as ECN support for TCPv4.
++ */
++ uint16_t features; /* XEN_NETIF_GSO_FEAT_* */
++ } gso;
++
++ /*
++ * XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL}:
++ * Backend advertises availability via 'feature-multicast-control'
++ * xenbus node containing value '1'.
++ * Frontend requests this feature by advertising
++ * 'request-multicast-control' xenbus node containing value '1'.
++ * If multicast control is requested then multicast flooding is
++ * disabled and the frontend must explicitly register its interest
++ * in multicast groups using dummy transmit requests containing
++ * MCAST_{ADD,DEL} extra-info fragments.
++ */
++ struct {
++ uint8_t addr[6]; /* Address to add/remove. */
++ } mcast;
+
+- uint16_t pad[3];
+- } u;
++ uint16_t pad[3];
++ } u;
+ };
++typedef struct netif_extra_info netif_extra_info_t;
+
+-struct xen_netif_tx_response {
+- uint16_t id;
+- int16_t status; /* NETIF_RSP_* */
++struct netif_tx_response {
++ uint16_t id;
++ int16_t status; /* NETIF_RSP_* */
+ };
++typedef struct netif_tx_response netif_tx_response_t;
+
+-struct xen_netif_rx_request {
+- uint16_t id; /* Echoed in response message. */
+- grant_ref_t gref; /* Reference to incoming granted frame */
++struct netif_rx_request {
++ uint16_t id; /* Echoed in response message. */
++ grant_ref_t gref; /* Reference to incoming granted frame */
+ };
++typedef struct netif_rx_request netif_rx_request_t;
+
+ /* Packet data has been validated against protocol checksum. */
+ #define _NETRXF_data_validated (0)
+@@ -131,23 +171,20 @@ struct xen_netif_rx_request {
+ #define _NETRXF_extra_info (3)
+ #define NETRXF_extra_info (1U<<_NETRXF_extra_info)
+
+-struct xen_netif_rx_response {
++struct netif_rx_response {
+ uint16_t id;
+ uint16_t offset; /* Offset in page of start of received packet */
+ uint16_t flags; /* NETRXF_* */
+ int16_t status; /* -ve: BLKIF_RSP_* ; +ve: Rx'ed pkt size. */
+ };
++typedef struct netif_rx_response netif_rx_response_t;
+
+ /*
+ * Generate netif ring structures and types.
+ */
+
+-DEFINE_RING_TYPES(xen_netif_tx,
+- struct xen_netif_tx_request,
+- struct xen_netif_tx_response);
+-DEFINE_RING_TYPES(xen_netif_rx,
+- struct xen_netif_rx_request,
+- struct xen_netif_rx_response);
++DEFINE_RING_TYPES(netif_tx, struct netif_tx_request, struct netif_tx_response);
++DEFINE_RING_TYPES(netif_rx, struct netif_rx_request, struct netif_rx_response);
+
+ #define NETIF_RSP_DROPPED -2
+ #define NETIF_RSP_ERROR -1
+@@ -156,3 +193,13 @@ DEFINE_RING_TYPES(xen_netif_rx,
+ #define NETIF_RSP_NULL 1
+
+ #endif
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/protocols.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/protocols.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/protocols.h 2008-11-25 12:35:56.000000000 +0100
+@@ -1,10 +1,31 @@
++/******************************************************************************
++ * protocols.h
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ */
++
+ #ifndef __XEN_PROTOCOLS_H__
+ #define __XEN_PROTOCOLS_H__
+
+ #define XEN_IO_PROTO_ABI_X86_32 "x86_32-abi"
+ #define XEN_IO_PROTO_ABI_X86_64 "x86_64-abi"
+ #define XEN_IO_PROTO_ABI_IA64 "ia64-abi"
+-#define XEN_IO_PROTO_ABI_POWERPC64 "powerpc64-abi"
+
+ #if defined(__i386__)
+ # define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_X86_32
+@@ -12,8 +33,6 @@
+ # define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_X86_64
+ #elif defined(__ia64__)
+ # define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_IA64
+-#elif defined(__powerpc64__)
+-# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_POWERPC64
+ #else
+ # error arch fixup needed here
+ #endif
+Index: head-2008-11-25/include/xen/interface/io/ring.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/ring.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/ring.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,16 +3,42 @@
+ *
+ * Shared producer-consumer ring macros.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Tim Deegan and Andrew Warfield November 2004.
+ */
+
+ #ifndef __XEN_PUBLIC_IO_RING_H__
+ #define __XEN_PUBLIC_IO_RING_H__
+
++#include "../xen-compat.h"
++
++#if __XEN_INTERFACE_VERSION__ < 0x00030208
++#define xen_mb() mb()
++#define xen_rmb() rmb()
++#define xen_wmb() wmb()
++#endif
++
+ typedef unsigned int RING_IDX;
+
+ /* Round a 32-bit unsigned constant down to the nearest power of two. */
+-#define __RD2(_x) (((_x) & 0x00000002) ? 0x2 : ((_x) & 0x1))
++#define __RD2(_x) (((_x) & 0x00000002) ? 0x2 : ((_x) & 0x1))
+ #define __RD4(_x) (((_x) & 0x0000000c) ? __RD2((_x)>>2)<<2 : __RD2(_x))
+ #define __RD8(_x) (((_x) & 0x000000f0) ? __RD4((_x)>>4)<<4 : __RD4(_x))
+ #define __RD16(_x) (((_x) & 0x0000ff00) ? __RD8((_x)>>8)<<8 : __RD8(_x))
+@@ -25,73 +51,76 @@ typedef unsigned int RING_IDX;
+ * power of two (so we can mask with (size-1) to loop around).
+ */
+ #define __RING_SIZE(_s, _sz) \
+- (__RD32(((_sz) - (long)&(_s)->ring + (long)(_s)) / sizeof((_s)->ring[0])))
++ (__RD32(((_sz) - (long)(_s)->ring + (long)(_s)) / sizeof((_s)->ring[0])))
+
+ /*
+ * Macros to make the correct C datatypes for a new kind of ring.
+ *
+ * To make a new ring datatype, you need to have two message structures,
+- * let's say struct request, and struct response already defined.
++ * let's say request_t, and response_t already defined.
+ *
+ * In a header where you want the ring datatype declared, you then do:
+ *
+- * DEFINE_RING_TYPES(mytag, struct request, struct response);
++ * DEFINE_RING_TYPES(mytag, request_t, response_t);
+ *
+ * These expand out to give you a set of types, as you can see below.
+ * The most important of these are:
+ *
+- * struct mytag_sring - The shared ring.
+- * struct mytag_front_ring - The 'front' half of the ring.
+- * struct mytag_back_ring - The 'back' half of the ring.
++ * mytag_sring_t - The shared ring.
++ * mytag_front_ring_t - The 'front' half of the ring.
++ * mytag_back_ring_t - The 'back' half of the ring.
+ *
+ * To initialize a ring in your code you need to know the location and size
+ * of the shared memory area (PAGE_SIZE, for instance). To initialise
+ * the front half:
+ *
+- * struct mytag_front_ring front_ring;
+- * SHARED_RING_INIT((struct mytag_sring *)shared_page);
+- * FRONT_RING_INIT(&front_ring, (struct mytag_sring *)shared_page,
+- * PAGE_SIZE);
++ * mytag_front_ring_t front_ring;
++ * SHARED_RING_INIT((mytag_sring_t *)shared_page);
++ * FRONT_RING_INIT(&front_ring, (mytag_sring_t *)shared_page, PAGE_SIZE);
+ *
+ * Initializing the back follows similarly (note that only the front
+ * initializes the shared ring):
+ *
+- * struct mytag_back_ring back_ring;
+- * BACK_RING_INIT(&back_ring, (struct mytag_sring *)shared_page,
+- * PAGE_SIZE);
++ * mytag_back_ring_t back_ring;
++ * BACK_RING_INIT(&back_ring, (mytag_sring_t *)shared_page, PAGE_SIZE);
+ */
+
+-#define DEFINE_RING_TYPES(__name, __req_t, __rsp_t) \
+- \
+-/* Shared ring entry */ \
+-union __name##_sring_entry { \
+- __req_t req; \
+- __rsp_t rsp; \
+-}; \
+- \
+-/* Shared ring page */ \
+-struct __name##_sring { \
+- RING_IDX req_prod, req_event; \
+- RING_IDX rsp_prod, rsp_event; \
+- uint8_t pad[48]; \
+- union __name##_sring_entry ring[1]; /* variable-length */ \
+-}; \
+- \
+-/* "Front" end's private variables */ \
+-struct __name##_front_ring { \
+- RING_IDX req_prod_pvt; \
+- RING_IDX rsp_cons; \
+- unsigned int nr_ents; \
+- struct __name##_sring *sring; \
+-}; \
+- \
+-/* "Back" end's private variables */ \
+-struct __name##_back_ring { \
+- RING_IDX rsp_prod_pvt; \
+- RING_IDX req_cons; \
+- unsigned int nr_ents; \
+- struct __name##_sring *sring; \
+-};
++#define DEFINE_RING_TYPES(__name, __req_t, __rsp_t) \
++ \
++/* Shared ring entry */ \
++union __name##_sring_entry { \
++ __req_t req; \
++ __rsp_t rsp; \
++}; \
++ \
++/* Shared ring page */ \
++struct __name##_sring { \
++ RING_IDX req_prod, req_event; \
++ RING_IDX rsp_prod, rsp_event; \
++ uint8_t pad[48]; \
++ union __name##_sring_entry ring[1]; /* variable-length */ \
++}; \
++ \
++/* "Front" end's private variables */ \
++struct __name##_front_ring { \
++ RING_IDX req_prod_pvt; \
++ RING_IDX rsp_cons; \
++ unsigned int nr_ents; \
++ struct __name##_sring *sring; \
++}; \
++ \
++/* "Back" end's private variables */ \
++struct __name##_back_ring { \
++ RING_IDX rsp_prod_pvt; \
++ RING_IDX req_cons; \
++ unsigned int nr_ents; \
++ struct __name##_sring *sring; \
++}; \
++ \
++/* Syntactic sugar */ \
++typedef struct __name##_sring __name##_sring_t; \
++typedef struct __name##_front_ring __name##_front_ring_t; \
++typedef struct __name##_back_ring __name##_back_ring_t
+
+ /*
+ * Macros for manipulating rings.
+@@ -109,86 +138,94 @@ struct __name##_back_ring { \
+ */
+
+ /* Initialising empty rings */
+-#define SHARED_RING_INIT(_s) do { \
+- (_s)->req_prod = (_s)->rsp_prod = 0; \
+- (_s)->req_event = (_s)->rsp_event = 1; \
+- memset((_s)->pad, 0, sizeof((_s)->pad)); \
++#define SHARED_RING_INIT(_s) do { \
++ (_s)->req_prod = (_s)->rsp_prod = 0; \
++ (_s)->req_event = (_s)->rsp_event = 1; \
++ (void)memset((_s)->pad, 0, sizeof((_s)->pad)); \
+ } while(0)
+
+-#define FRONT_RING_INIT(_r, _s, __size) do { \
+- (_r)->req_prod_pvt = 0; \
+- (_r)->rsp_cons = 0; \
+- (_r)->nr_ents = __RING_SIZE(_s, __size); \
+- (_r)->sring = (_s); \
++#define FRONT_RING_INIT(_r, _s, __size) do { \
++ (_r)->req_prod_pvt = 0; \
++ (_r)->rsp_cons = 0; \
++ (_r)->nr_ents = __RING_SIZE(_s, __size); \
++ (_r)->sring = (_s); \
+ } while (0)
+
+-#define BACK_RING_INIT(_r, _s, __size) do { \
+- (_r)->rsp_prod_pvt = 0; \
+- (_r)->req_cons = 0; \
+- (_r)->nr_ents = __RING_SIZE(_s, __size); \
+- (_r)->sring = (_s); \
++#define BACK_RING_INIT(_r, _s, __size) do { \
++ (_r)->rsp_prod_pvt = 0; \
++ (_r)->req_cons = 0; \
++ (_r)->nr_ents = __RING_SIZE(_s, __size); \
++ (_r)->sring = (_s); \
+ } while (0)
+
+ /* Initialize to existing shared indexes -- for recovery */
+-#define FRONT_RING_ATTACH(_r, _s, __size) do { \
+- (_r)->sring = (_s); \
+- (_r)->req_prod_pvt = (_s)->req_prod; \
+- (_r)->rsp_cons = (_s)->rsp_prod; \
+- (_r)->nr_ents = __RING_SIZE(_s, __size); \
++#define FRONT_RING_ATTACH(_r, _s, __size) do { \
++ (_r)->sring = (_s); \
++ (_r)->req_prod_pvt = (_s)->req_prod; \
++ (_r)->rsp_cons = (_s)->rsp_prod; \
++ (_r)->nr_ents = __RING_SIZE(_s, __size); \
+ } while (0)
+
+-#define BACK_RING_ATTACH(_r, _s, __size) do { \
+- (_r)->sring = (_s); \
+- (_r)->rsp_prod_pvt = (_s)->rsp_prod; \
+- (_r)->req_cons = (_s)->req_prod; \
+- (_r)->nr_ents = __RING_SIZE(_s, __size); \
++#define BACK_RING_ATTACH(_r, _s, __size) do { \
++ (_r)->sring = (_s); \
++ (_r)->rsp_prod_pvt = (_s)->rsp_prod; \
++ (_r)->req_cons = (_s)->req_prod; \
++ (_r)->nr_ents = __RING_SIZE(_s, __size); \
+ } while (0)
+
+ /* How big is this ring? */
+-#define RING_SIZE(_r) \
++#define RING_SIZE(_r) \
+ ((_r)->nr_ents)
+
+ /* Number of free requests (for use on front side only). */
+-#define RING_FREE_REQUESTS(_r) \
++#define RING_FREE_REQUESTS(_r) \
+ (RING_SIZE(_r) - ((_r)->req_prod_pvt - (_r)->rsp_cons))
+
+ /* Test if there is an empty slot available on the front ring.
+ * (This is only meaningful from the front. )
+ */
+-#define RING_FULL(_r) \
++#define RING_FULL(_r) \
+ (RING_FREE_REQUESTS(_r) == 0)
+
+ /* Test if there are outstanding messages to be processed on a ring. */
+-#define RING_HAS_UNCONSUMED_RESPONSES(_r) \
++#define RING_HAS_UNCONSUMED_RESPONSES(_r) \
+ ((_r)->sring->rsp_prod - (_r)->rsp_cons)
+
+-#define RING_HAS_UNCONSUMED_REQUESTS(_r) \
+- ({ \
+- unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \
+- unsigned int rsp = RING_SIZE(_r) - \
+- ((_r)->req_cons - (_r)->rsp_prod_pvt); \
+- req < rsp ? req : rsp; \
+- })
++#ifdef __GNUC__
++#define RING_HAS_UNCONSUMED_REQUESTS(_r) ({ \
++ unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \
++ unsigned int rsp = RING_SIZE(_r) - \
++ ((_r)->req_cons - (_r)->rsp_prod_pvt); \
++ req < rsp ? req : rsp; \
++})
++#else
++/* Same as above, but without the nice GCC ({ ... }) syntax. */
++#define RING_HAS_UNCONSUMED_REQUESTS(_r) \
++ ((((_r)->sring->req_prod - (_r)->req_cons) < \
++ (RING_SIZE(_r) - ((_r)->req_cons - (_r)->rsp_prod_pvt))) ? \
++ ((_r)->sring->req_prod - (_r)->req_cons) : \
++ (RING_SIZE(_r) - ((_r)->req_cons - (_r)->rsp_prod_pvt)))
++#endif
+
+ /* Direct access to individual ring elements, by index. */
+-#define RING_GET_REQUEST(_r, _idx) \
++#define RING_GET_REQUEST(_r, _idx) \
+ (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req))
+
+-#define RING_GET_RESPONSE(_r, _idx) \
++#define RING_GET_RESPONSE(_r, _idx) \
+ (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp))
+
+ /* Loop termination condition: Would the specified index overflow the ring? */
+-#define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \
++#define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \
+ (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r))
+
+-#define RING_PUSH_REQUESTS(_r) do { \
+- wmb(); /* back sees requests /before/ updated producer index */ \
+- (_r)->sring->req_prod = (_r)->req_prod_pvt; \
++#define RING_PUSH_REQUESTS(_r) do { \
++ xen_wmb(); /* back sees requests /before/ updated producer index */ \
++ (_r)->sring->req_prod = (_r)->req_prod_pvt; \
+ } while (0)
+
+-#define RING_PUSH_RESPONSES(_r) do { \
+- wmb(); /* front sees responses /before/ updated producer index */ \
+- (_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \
++#define RING_PUSH_RESPONSES(_r) do { \
++ xen_wmb(); /* front sees resps /before/ updated producer index */ \
++ (_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \
+ } while (0)
+
+ /*
+@@ -221,40 +258,50 @@ struct __name##_back_ring { \
+ * field appropriately.
+ */
+
+-#define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \
+- RING_IDX __old = (_r)->sring->req_prod; \
+- RING_IDX __new = (_r)->req_prod_pvt; \
+- wmb(); /* back sees requests /before/ updated producer index */ \
+- (_r)->sring->req_prod = __new; \
+- mb(); /* back sees new requests /before/ we check req_event */ \
+- (_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \
+- (RING_IDX)(__new - __old)); \
++#define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \
++ RING_IDX __old = (_r)->sring->req_prod; \
++ RING_IDX __new = (_r)->req_prod_pvt; \
++ xen_wmb(); /* back sees requests /before/ updated producer index */ \
++ (_r)->sring->req_prod = __new; \
++ xen_mb(); /* back sees new requests /before/ we check req_event */ \
++ (_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \
++ (RING_IDX)(__new - __old)); \
+ } while (0)
+
+-#define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \
+- RING_IDX __old = (_r)->sring->rsp_prod; \
+- RING_IDX __new = (_r)->rsp_prod_pvt; \
+- wmb(); /* front sees responses /before/ updated producer index */ \
+- (_r)->sring->rsp_prod = __new; \
+- mb(); /* front sees new responses /before/ we check rsp_event */ \
+- (_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \
+- (RING_IDX)(__new - __old)); \
++#define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \
++ RING_IDX __old = (_r)->sring->rsp_prod; \
++ RING_IDX __new = (_r)->rsp_prod_pvt; \
++ xen_wmb(); /* front sees resps /before/ updated producer index */ \
++ (_r)->sring->rsp_prod = __new; \
++ xen_mb(); /* front sees new resps /before/ we check rsp_event */ \
++ (_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \
++ (RING_IDX)(__new - __old)); \
+ } while (0)
+
+-#define RING_FINAL_CHECK_FOR_REQUESTS(_r, _work_to_do) do { \
+- (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
+- if (_work_to_do) break; \
+- (_r)->sring->req_event = (_r)->req_cons + 1; \
+- mb(); \
+- (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
++#define RING_FINAL_CHECK_FOR_REQUESTS(_r, _work_to_do) do { \
++ (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
++ if (_work_to_do) break; \
++ (_r)->sring->req_event = (_r)->req_cons + 1; \
++ xen_mb(); \
++ (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
+ } while (0)
+
+-#define RING_FINAL_CHECK_FOR_RESPONSES(_r, _work_to_do) do { \
+- (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \
+- if (_work_to_do) break; \
+- (_r)->sring->rsp_event = (_r)->rsp_cons + 1; \
+- mb(); \
+- (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \
++#define RING_FINAL_CHECK_FOR_RESPONSES(_r, _work_to_do) do { \
++ (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \
++ if (_work_to_do) break; \
++ (_r)->sring->rsp_event = (_r)->rsp_cons + 1; \
++ xen_mb(); \
++ (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \
+ } while (0)
+
+ #endif /* __XEN_PUBLIC_IO_RING_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/io/xenbus.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/xenbus.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/xenbus.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,42 +3,78 @@
+ *
+ * Xenbus protocol details.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (C) 2005 XenSource Ltd.
+ */
+
+ #ifndef _XEN_PUBLIC_IO_XENBUS_H
+ #define _XEN_PUBLIC_IO_XENBUS_H
+
+-/* The state of either end of the Xenbus, i.e. the current communication
+- status of initialisation across the bus. States here imply nothing about
+- the state of the connection between the driver and the kernel's device
+- layers. */
+-enum xenbus_state
+-{
+- XenbusStateUnknown = 0,
+- XenbusStateInitialising = 1,
+- XenbusStateInitWait = 2, /* Finished early
+- initialisation, but waiting
+- for information from the peer
+- or hotplug scripts. */
+- XenbusStateInitialised = 3, /* Initialised and waiting for a
+- connection from the peer. */
+- XenbusStateConnected = 4,
+- XenbusStateClosing = 5, /* The device is being closed
+- due to an error or an unplug
+- event. */
+- XenbusStateClosed = 6
++/*
++ * The state of either end of the Xenbus, i.e. the current communication
++ * status of initialisation across the bus. States here imply nothing about
++ * the state of the connection between the driver and the kernel's device
++ * layers.
++ */
++enum xenbus_state {
++ XenbusStateUnknown = 0,
++
++ XenbusStateInitialising = 1,
++
++ /*
++ * InitWait: Finished early initialisation but waiting for information
++ * from the peer or hotplug scripts.
++ */
++ XenbusStateInitWait = 2,
++
++ /*
++ * Initialised: Waiting for a connection from the peer.
++ */
++ XenbusStateInitialised = 3,
++
++ XenbusStateConnected = 4,
++
++ /*
++ * Closing: The device is being closed due to an error or an unplug event.
++ */
++ XenbusStateClosing = 5,
++
++ XenbusStateClosed = 6,
++
++ /*
++ * Reconfiguring: The device is being reconfigured.
++ */
++ XenbusStateReconfiguring = 7,
+
++ XenbusStateReconfigured = 8
+ };
++typedef enum xenbus_state XenbusState;
+
+ #endif /* _XEN_PUBLIC_IO_XENBUS_H */
+
+ /*
+ * Local variables:
+- * c-file-style: "linux"
+- * indent-tabs-mode: t
+- * c-indent-level: 8
+- * c-basic-offset: 8
+- * tab-width: 8
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
+ * End:
+ */
+Index: head-2008-11-25/include/xen/interface/io/xs_wire.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/io/xs_wire.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/io/xs_wire.h 2008-11-25 12:35:56.000000000 +0100
+@@ -1,6 +1,25 @@
+ /*
+ * Details of the "wire" protocol between Xen Store Daemon and client
+ * library or guest kernel.
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (C) 2005 Rusty Russell IBM Corporation
+ */
+
+@@ -26,7 +45,9 @@ enum xsd_sockmsg_type
+ XS_SET_PERMS,
+ XS_WATCH_EVENT,
+ XS_ERROR,
+- XS_IS_DOMAIN_INTRODUCED
++ XS_IS_DOMAIN_INTRODUCED,
++ XS_RESUME,
++ XS_SET_TARGET
+ };
+
+ #define XS_WRITE_NONE "NONE"
+@@ -40,7 +61,12 @@ struct xsd_errors
+ const char *errstring;
+ };
+ #define XSD_ERROR(x) { x, #x }
+-static struct xsd_errors xsd_errors[] __attribute__((unused)) = {
++/* LINTED: static unused */
++static struct xsd_errors xsd_errors[]
++#if defined(__GNUC__)
++__attribute__((unused))
++#endif
++ = {
+ XSD_ERROR(EINVAL),
+ XSD_ERROR(EACCES),
+ XSD_ERROR(EEXIST),
+@@ -84,4 +110,21 @@ struct xenstore_domain_interface {
+ XENSTORE_RING_IDX rsp_cons, rsp_prod;
+ };
+
++/* Violating this is very bad. See docs/misc/xenstore.txt. */
++#define XENSTORE_PAYLOAD_MAX 4096
++
++/* Violating these just gets you an error back */
++#define XENSTORE_ABS_PATH_MAX 3072
++#define XENSTORE_REL_PATH_MAX 2048
++
+ #endif /* _XS_WIRE_H */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/memory.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/memory.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/memory.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,6 +3,24 @@
+ *
+ * Memory reservation and information.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
+ */
+
+@@ -10,13 +28,28 @@
+ #define __XEN_PUBLIC_MEMORY_H__
+
+ /*
+- * Increase or decrease the specified domain's memory reservation. Returns a
+- * -ve errcode on failure, or the # extents successfully allocated or freed.
++ * Increase or decrease the specified domain's memory reservation. Returns the
++ * number of extents successfully allocated or freed.
+ * arg == addr of struct xen_memory_reservation.
+ */
+ #define XENMEM_increase_reservation 0
+ #define XENMEM_decrease_reservation 1
+ #define XENMEM_populate_physmap 6
++
++#if __XEN_INTERFACE_VERSION__ >= 0x00030209
++/*
++ * Maximum # bits addressable by the user of the allocated region (e.g., I/O
++ * devices often have a 32-bit limitation even in 64-bit systems). If zero
++ * then the user has no addressing restriction. This field is not used by
++ * XENMEM_decrease_reservation.
++ */
++#define XENMEMF_address_bits(x) (x)
++#define XENMEMF_get_address_bits(x) ((x) & 0xffu)
++/* NUMA node to allocate from. */
++#define XENMEMF_node(x) (((x) + 1) << 8)
++#define XENMEMF_get_node(x) ((((x) >> 8) - 1) & 0xffu)
++#endif
++
+ struct xen_memory_reservation {
+
+ /*
+@@ -29,19 +62,18 @@ struct xen_memory_reservation {
+ * OUT: GMFN bases of extents that were allocated
+ * (NB. This command also updates the mach_to_phys translation table)
+ */
+- GUEST_HANDLE(ulong) extent_start;
++ XEN_GUEST_HANDLE(ulong) extent_start;
+
+ /* Number of extents, and size/alignment of each (2^extent_order pages). */
+- unsigned long nr_extents;
++ xen_ulong_t nr_extents;
+ unsigned int extent_order;
+
+- /*
+- * Maximum # bits addressable by the user of the allocated region (e.g.,
+- * I/O devices often have a 32-bit limitation even in 64-bit systems). If
+- * zero then the user has no addressing restriction.
+- * This field is not used by XENMEM_decrease_reservation.
+- */
++#if __XEN_INTERFACE_VERSION__ >= 0x00030209
++ /* XENMEMF flags. */
++ unsigned int mem_flags;
++#else
+ unsigned int address_bits;
++#endif
+
+ /*
+ * Domain whose reservation is being changed.
+@@ -50,7 +82,51 @@ struct xen_memory_reservation {
+ domid_t domid;
+
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(xen_memory_reservation);
++typedef struct xen_memory_reservation xen_memory_reservation_t;
++DEFINE_XEN_GUEST_HANDLE(xen_memory_reservation_t);
++
++/*
++ * An atomic exchange of memory pages. If return code is zero then
++ * @out.extent_list provides GMFNs of the newly-allocated memory.
++ * Returns zero on complete success, otherwise a negative error code.
++ * On complete success then always @nr_exchanged == @in.nr_extents.
++ * On partial success @nr_exchanged indicates how much work was done.
++ */
++#define XENMEM_exchange 11
++struct xen_memory_exchange {
++ /*
++ * [IN] Details of memory extents to be exchanged (GMFN bases).
++ * Note that @in.address_bits is ignored and unused.
++ */
++ struct xen_memory_reservation in;
++
++ /*
++ * [IN/OUT] Details of new memory extents.
++ * We require that:
++ * 1. @in.domid == @out.domid
++ * 2. @in.nr_extents << @in.extent_order ==
++ * @out.nr_extents << @out.extent_order
++ * 3. @in.extent_start and @out.extent_start lists must not overlap
++ * 4. @out.extent_start lists GPFN bases to be populated
++ * 5. @out.extent_start is overwritten with allocated GMFN bases
++ */
++ struct xen_memory_reservation out;
++
++ /*
++ * [OUT] Number of input extents that were successfully exchanged:
++ * 1. The first @nr_exchanged input extents were successfully
++ * deallocated.
++ * 2. The corresponding first entries in the output extent list correctly
++ * indicate the GMFNs that were successfully exchanged.
++ * 3. All other input and output extents are untouched.
++ * 4. If not all input exents are exchanged then the return code of this
++ * command will be non-zero.
++ * 5. THIS FIELD MUST BE INITIALISED TO ZERO BY THE CALLER!
++ */
++ xen_ulong_t nr_exchanged;
++};
++typedef struct xen_memory_exchange xen_memory_exchange_t;
++DEFINE_XEN_GUEST_HANDLE(xen_memory_exchange_t);
+
+ /*
+ * Returns the maximum machine frame number of mapped RAM in this system.
+@@ -68,6 +144,11 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_memory_re
+ #define XENMEM_maximum_reservation 4
+
+ /*
++ * Returns the maximum GPFN in use by the guest, or -ve errcode on failure.
++ */
++#define XENMEM_maximum_gpfn 14
++
++/*
+ * Returns a list of MFN bases of 2MB extents comprising the machine_to_phys
+ * mapping table. Architectures which do not have a m2p table do not implement
+ * this command.
+@@ -86,7 +167,7 @@ struct xen_machphys_mfn_list {
+ * any large discontiguities in the machine address space, 2MB gaps in
+ * the machphys table will be represented by an MFN base of zero.
+ */
+- GUEST_HANDLE(ulong) extent_start;
++ XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
+
+ /*
+ * Number of extents written to the above array. This will be smaller
+@@ -94,7 +175,22 @@ struct xen_machphys_mfn_list {
+ */
+ unsigned int nr_extents;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list);
++typedef struct xen_machphys_mfn_list xen_machphys_mfn_list_t;
++DEFINE_XEN_GUEST_HANDLE(xen_machphys_mfn_list_t);
++
++/*
++ * Returns the location in virtual address space of the machine_to_phys
++ * mapping table. Architectures which do not have a m2p table, or which do not
++ * map it by default into guest address space, do not implement this command.
++ * arg == addr of xen_machphys_mapping_t.
++ */
++#define XENMEM_machphys_mapping 12
++struct xen_machphys_mapping {
++ xen_ulong_t v_start, v_end; /* Start and end virtual addresses. */
++ xen_ulong_t max_mfn; /* Maximum MFN that can be looked up. */
++};
++typedef struct xen_machphys_mapping xen_machphys_mapping_t;
++DEFINE_XEN_GUEST_HANDLE(xen_machphys_mapping_t);
+
+ /*
+ * Sets the GPFN at which a particular page appears in the specified guest's
+@@ -109,15 +205,33 @@ struct xen_add_to_physmap {
+ /* Source mapping space. */
+ #define XENMAPSPACE_shared_info 0 /* shared info page */
+ #define XENMAPSPACE_grant_table 1 /* grant table page */
++#define XENMAPSPACE_mfn 2 /* usual MFN */
+ unsigned int space;
+
+ /* Index into source mapping space. */
+- unsigned long idx;
++ xen_ulong_t idx;
+
+ /* GPFN where the source mapping page should appear. */
+- unsigned long gpfn;
++ xen_pfn_t gpfn;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
++typedef struct xen_add_to_physmap xen_add_to_physmap_t;
++DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
++
++/*
++ * Unmaps the page appearing at a particular GPFN from the specified guest's
++ * pseudophysical address space.
++ * arg == addr of xen_remove_from_physmap_t.
++ */
++#define XENMEM_remove_from_physmap 15
++struct xen_remove_from_physmap {
++ /* Which domain to change the mapping for. */
++ domid_t domid;
++
++ /* GPFN of the current mapping of the page. */
++ xen_pfn_t gpfn;
++};
++typedef struct xen_remove_from_physmap xen_remove_from_physmap_t;
++DEFINE_XEN_GUEST_HANDLE(xen_remove_from_physmap_t);
+
+ /*
+ * Translates a list of domain-specific GPFNs into MFNs. Returns a -ve error
+@@ -129,17 +243,71 @@ struct xen_translate_gpfn_list {
+ domid_t domid;
+
+ /* Length of list. */
+- unsigned long nr_gpfns;
++ xen_ulong_t nr_gpfns;
+
+ /* List of GPFNs to translate. */
+- GUEST_HANDLE(ulong) gpfn_list;
++ XEN_GUEST_HANDLE(xen_pfn_t) gpfn_list;
+
+ /*
+ * Output list to contain MFN translations. May be the same as the input
+ * list (in which case each input GPFN is overwritten with the output MFN).
+ */
+- GUEST_HANDLE(ulong) mfn_list;
++ XEN_GUEST_HANDLE(xen_pfn_t) mfn_list;
++};
++typedef struct xen_translate_gpfn_list xen_translate_gpfn_list_t;
++DEFINE_XEN_GUEST_HANDLE(xen_translate_gpfn_list_t);
++
++/*
++ * Returns the pseudo-physical memory map as it was when the domain
++ * was started (specified by XENMEM_set_memory_map).
++ * arg == addr of xen_memory_map_t.
++ */
++#define XENMEM_memory_map 9
++struct xen_memory_map {
++ /*
++ * On call the number of entries which can be stored in buffer. On
++ * return the number of entries which have been stored in
++ * buffer.
++ */
++ unsigned int nr_entries;
++
++ /*
++ * Entries in the buffer are in the same format as returned by the
++ * BIOS INT 0x15 EAX=0xE820 call.
++ */
++ XEN_GUEST_HANDLE(void) buffer;
++};
++typedef struct xen_memory_map xen_memory_map_t;
++DEFINE_XEN_GUEST_HANDLE(xen_memory_map_t);
++
++/*
++ * Returns the real physical memory map. Passes the same structure as
++ * XENMEM_memory_map.
++ * arg == addr of xen_memory_map_t.
++ */
++#define XENMEM_machine_memory_map 10
++
++/*
++ * Set the pseudo-physical memory map of a domain, as returned by
++ * XENMEM_memory_map.
++ * arg == addr of xen_foreign_memory_map_t.
++ */
++#define XENMEM_set_memory_map 13
++struct xen_foreign_memory_map {
++ domid_t domid;
++ struct xen_memory_map map;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(xen_translate_gpfn_list);
++typedef struct xen_foreign_memory_map xen_foreign_memory_map_t;
++DEFINE_XEN_GUEST_HANDLE(xen_foreign_memory_map_t);
+
+ #endif /* __XEN_PUBLIC_MEMORY_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/physdev.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/physdev.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/physdev.h 2008-11-25 12:35:56.000000000 +0100
+@@ -24,7 +24,7 @@
+ /*
+ * Prototype for this hypercall is:
+ * int physdev_op(int cmd, void *args)
+- * @cmd == PHYSDEVOP_??? (physdev operation).
++ * @cmd == PHYSDEVOP_??? (physdev operation).
+ * @args == Operation-specific extra arguments (NULL if none).
+ */
+
+@@ -32,114 +32,188 @@
+ * Notify end-of-interrupt (EOI) for the specified IRQ.
+ * @arg == pointer to physdev_eoi structure.
+ */
+-#define PHYSDEVOP_eoi 12
++#define PHYSDEVOP_eoi 12
+ struct physdev_eoi {
+- /* IN */
+- uint32_t irq;
++ /* IN */
++ uint32_t irq;
+ };
++typedef struct physdev_eoi physdev_eoi_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_eoi_t);
+
+ /*
+ * Query the status of an IRQ line.
+ * @arg == pointer to physdev_irq_status_query structure.
+ */
+-#define PHYSDEVOP_irq_status_query 5
++#define PHYSDEVOP_irq_status_query 5
+ struct physdev_irq_status_query {
+- /* IN */
+- uint32_t irq;
+- /* OUT */
+- uint32_t flags; /* XENIRQSTAT_* */
++ /* IN */
++ uint32_t irq;
++ /* OUT */
++ uint32_t flags; /* XENIRQSTAT_* */
+ };
++typedef struct physdev_irq_status_query physdev_irq_status_query_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_irq_status_query_t);
+
+ /* Need to call PHYSDEVOP_eoi when the IRQ has been serviced? */
+-#define _XENIRQSTAT_needs_eoi (0)
+-#define XENIRQSTAT_needs_eoi (1U<<_XENIRQSTAT_needs_eoi)
++#define _XENIRQSTAT_needs_eoi (0)
++#define XENIRQSTAT_needs_eoi (1U<<_XENIRQSTAT_needs_eoi)
+
+ /* IRQ shared by multiple guests? */
+-#define _XENIRQSTAT_shared (1)
+-#define XENIRQSTAT_shared (1U<<_XENIRQSTAT_shared)
++#define _XENIRQSTAT_shared (1)
++#define XENIRQSTAT_shared (1U<<_XENIRQSTAT_shared)
+
+ /*
+ * Set the current VCPU's I/O privilege level.
+ * @arg == pointer to physdev_set_iopl structure.
+ */
+-#define PHYSDEVOP_set_iopl 6
++#define PHYSDEVOP_set_iopl 6
+ struct physdev_set_iopl {
+- /* IN */
+- uint32_t iopl;
++ /* IN */
++ uint32_t iopl;
+ };
++typedef struct physdev_set_iopl physdev_set_iopl_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_set_iopl_t);
+
+ /*
+ * Set the current VCPU's I/O-port permissions bitmap.
+ * @arg == pointer to physdev_set_iobitmap structure.
+ */
+-#define PHYSDEVOP_set_iobitmap 7
++#define PHYSDEVOP_set_iobitmap 7
+ struct physdev_set_iobitmap {
+- /* IN */
+- uint8_t * bitmap;
+- uint32_t nr_ports;
++ /* IN */
++#if __XEN_INTERFACE_VERSION__ >= 0x00030205
++ XEN_GUEST_HANDLE(uint8) bitmap;
++#else
++ uint8_t *bitmap;
++#endif
++ uint32_t nr_ports;
+ };
++typedef struct physdev_set_iobitmap physdev_set_iobitmap_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_set_iobitmap_t);
+
+ /*
+ * Read or write an IO-APIC register.
+ * @arg == pointer to physdev_apic structure.
+ */
+-#define PHYSDEVOP_apic_read 8
+-#define PHYSDEVOP_apic_write 9
++#define PHYSDEVOP_apic_read 8
++#define PHYSDEVOP_apic_write 9
+ struct physdev_apic {
+- /* IN */
+- unsigned long apic_physbase;
+- uint32_t reg;
+- /* IN or OUT */
+- uint32_t value;
++ /* IN */
++ unsigned long apic_physbase;
++ uint32_t reg;
++ /* IN or OUT */
++ uint32_t value;
+ };
++typedef struct physdev_apic physdev_apic_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_apic_t);
+
+ /*
+ * Allocate or free a physical upcall vector for the specified IRQ line.
+ * @arg == pointer to physdev_irq structure.
+ */
+-#define PHYSDEVOP_alloc_irq_vector 10
+-#define PHYSDEVOP_free_irq_vector 11
++#define PHYSDEVOP_alloc_irq_vector 10
++#define PHYSDEVOP_free_irq_vector 11
+ struct physdev_irq {
+- /* IN */
+- uint32_t irq;
+- /* IN or OUT */
+- uint32_t vector;
++ /* IN */
++ uint32_t irq;
++ /* IN or OUT */
++ uint32_t vector;
++};
++typedef struct physdev_irq physdev_irq_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_irq_t);
++
++#define MAP_PIRQ_TYPE_MSI 0x0
++#define MAP_PIRQ_TYPE_GSI 0x1
++#define MAP_PIRQ_TYPE_UNKNOWN 0x2
++
++#define PHYSDEVOP_map_pirq 13
++struct physdev_map_pirq {
++ domid_t domid;
++ /* IN */
++ int type;
++ /* IN */
++ int index;
++ /* IN or OUT */
++ int pirq;
++ /* IN */
++ int bus;
++ /* IN */
++ int devfn;
++ /* IN */
++ int entry_nr;
++ /* IN */
++ uint64_t table_base;
++};
++typedef struct physdev_map_pirq physdev_map_pirq_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_map_pirq_t);
++
++#define PHYSDEVOP_unmap_pirq 14
++struct physdev_unmap_pirq {
++ domid_t domid;
++ /* IN */
++ int pirq;
++};
++
++typedef struct physdev_unmap_pirq physdev_unmap_pirq_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_unmap_pirq_t);
++
++#define PHYSDEVOP_manage_pci_add 15
++#define PHYSDEVOP_manage_pci_remove 16
++struct physdev_manage_pci {
++ /* IN */
++ uint8_t bus;
++ uint8_t devfn;
+ };
+
++typedef struct physdev_manage_pci physdev_manage_pci_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_manage_pci_t);
++
+ /*
+ * Argument to physdev_op_compat() hypercall. Superceded by new physdev_op()
+ * hypercall since 0x00030202.
+ */
+ struct physdev_op {
+- uint32_t cmd;
+- union {
+- struct physdev_irq_status_query irq_status_query;
+- struct physdev_set_iopl set_iopl;
+- struct physdev_set_iobitmap set_iobitmap;
+- struct physdev_apic apic_op;
+- struct physdev_irq irq_op;
+- } u;
++ uint32_t cmd;
++ union {
++ struct physdev_irq_status_query irq_status_query;
++ struct physdev_set_iopl set_iopl;
++ struct physdev_set_iobitmap set_iobitmap;
++ struct physdev_apic apic_op;
++ struct physdev_irq irq_op;
++ } u;
+ };
++typedef struct physdev_op physdev_op_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_op_t);
+
+ /*
+ * Notify that some PIRQ-bound event channels have been unmasked.
+ * ** This command is obsolete since interface version 0x00030202 and is **
+- * ** unsupported by newer versions of Xen. **
++ * ** unsupported by newer versions of Xen. **
+ */
+-#define PHYSDEVOP_IRQ_UNMASK_NOTIFY 4
++#define PHYSDEVOP_IRQ_UNMASK_NOTIFY 4
+
+ /*
+ * These all-capitals physdev operation names are superceded by the new names
+ * (defined above) since interface version 0x00030202.
+ */
+-#define PHYSDEVOP_IRQ_STATUS_QUERY PHYSDEVOP_irq_status_query
+-#define PHYSDEVOP_SET_IOPL PHYSDEVOP_set_iopl
+-#define PHYSDEVOP_SET_IOBITMAP PHYSDEVOP_set_iobitmap
+-#define PHYSDEVOP_APIC_READ PHYSDEVOP_apic_read
+-#define PHYSDEVOP_APIC_WRITE PHYSDEVOP_apic_write
+-#define PHYSDEVOP_ASSIGN_VECTOR PHYSDEVOP_alloc_irq_vector
+-#define PHYSDEVOP_FREE_VECTOR PHYSDEVOP_free_irq_vector
++#define PHYSDEVOP_IRQ_STATUS_QUERY PHYSDEVOP_irq_status_query
++#define PHYSDEVOP_SET_IOPL PHYSDEVOP_set_iopl
++#define PHYSDEVOP_SET_IOBITMAP PHYSDEVOP_set_iobitmap
++#define PHYSDEVOP_APIC_READ PHYSDEVOP_apic_read
++#define PHYSDEVOP_APIC_WRITE PHYSDEVOP_apic_write
++#define PHYSDEVOP_ASSIGN_VECTOR PHYSDEVOP_alloc_irq_vector
++#define PHYSDEVOP_FREE_VECTOR PHYSDEVOP_free_irq_vector
+ #define PHYSDEVOP_IRQ_NEEDS_UNMASK_NOTIFY XENIRQSTAT_needs_eoi
+-#define PHYSDEVOP_IRQ_SHARED XENIRQSTAT_shared
++#define PHYSDEVOP_IRQ_SHARED XENIRQSTAT_shared
+
+ #endif /* __XEN_PUBLIC_PHYSDEV_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/sched.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/sched.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/sched.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,6 +3,24 @@
+ *
+ * Scheduler state interactions
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
+ */
+
+@@ -13,17 +31,17 @@
+
+ /*
+ * The prototype for this hypercall is:
+- * long sched_op_new(int cmd, void *arg)
++ * long sched_op(int cmd, void *arg)
+ * @cmd == SCHEDOP_??? (scheduler operation).
+ * @arg == Operation-specific extra argument(s), as described below.
+ *
+- * **NOTE**:
+- * Versions of Xen prior to 3.0.2 provide only the following legacy version
++ * Versions of Xen prior to 3.0.2 provided only the following legacy version
+ * of this hypercall, supporting only the commands yield, block and shutdown:
+ * long sched_op(int cmd, unsigned long arg)
+ * @cmd == SCHEDOP_??? (scheduler operation).
+ * @arg == 0 (SCHEDOP_yield and SCHEDOP_block)
+ * == SHUTDOWN_* code (SCHEDOP_shutdown)
++ * This legacy version is available to new guests as sched_op_compat().
+ */
+
+ /*
+@@ -49,7 +67,8 @@
+ struct sched_shutdown {
+ unsigned int reason; /* SHUTDOWN_* */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(sched_shutdown);
++typedef struct sched_shutdown sched_shutdown_t;
++DEFINE_XEN_GUEST_HANDLE(sched_shutdown_t);
+
+ /*
+ * Poll a set of event-channel ports. Return when one or more are pending. An
+@@ -58,11 +77,26 @@ DEFINE_GUEST_HANDLE_STRUCT(sched_shutdow
+ */
+ #define SCHEDOP_poll 3
+ struct sched_poll {
+- GUEST_HANDLE(evtchn_port_t) ports;
++ XEN_GUEST_HANDLE(evtchn_port_t) ports;
+ unsigned int nr_ports;
+ uint64_t timeout;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(sched_poll);
++typedef struct sched_poll sched_poll_t;
++DEFINE_XEN_GUEST_HANDLE(sched_poll_t);
++
++/*
++ * Declare a shutdown for another domain. The main use of this function is
++ * in interpreting shutdown requests and reasons for fully-virtualized
++ * domains. A para-virtualized domain may use SCHEDOP_shutdown directly.
++ * @arg == pointer to sched_remote_shutdown structure.
++ */
++#define SCHEDOP_remote_shutdown 4
++struct sched_remote_shutdown {
++ domid_t domain_id; /* Remote domain ID */
++ unsigned int reason; /* SHUTDOWN_xxx reason */
++};
++typedef struct sched_remote_shutdown sched_remote_shutdown_t;
++DEFINE_XEN_GUEST_HANDLE(sched_remote_shutdown_t);
+
+ /*
+ * Reason codes for SCHEDOP_shutdown. These may be interpreted by control
+@@ -75,3 +109,13 @@ DEFINE_GUEST_HANDLE_STRUCT(sched_poll);
+ #define SHUTDOWN_crash 3 /* Tell controller we've crashed. */
+
+ #endif /* __XEN_PUBLIC_SCHED_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/vcpu.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/vcpu.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/vcpu.h 2008-11-25 12:35:56.000000000 +0100
+@@ -29,9 +29,9 @@
+
+ /*
+ * Prototype for this hypercall is:
+- * int vcpu_op(int cmd, int vcpuid, void *extra_args)
+- * @cmd == VCPUOP_??? (VCPU operation).
+- * @vcpuid == VCPU to operate on.
++ * int vcpu_op(int cmd, int vcpuid, void *extra_args)
++ * @cmd == VCPUOP_??? (VCPU operation).
++ * @vcpuid == VCPU to operate on.
+ * @extra_args == Operation-specific extra arguments (NULL if none).
+ */
+
+@@ -40,52 +40,53 @@
+ * newly-initialised VCPU will not run until it is brought up by VCPUOP_up.
+ *
+ * @extra_arg == pointer to vcpu_guest_context structure containing initial
+- * state for the VCPU.
++ * state for the VCPU.
+ */
+-#define VCPUOP_initialise 0
++#define VCPUOP_initialise 0
+
+ /*
+ * Bring up a VCPU. This makes the VCPU runnable. This operation will fail
+ * if the VCPU has not been initialised (VCPUOP_initialise).
+ */
+-#define VCPUOP_up 1
++#define VCPUOP_up 1
+
+ /*
+ * Bring down a VCPU (i.e., make it non-runnable).
+ * There are a few caveats that callers should observe:
+- * 1. This operation may return, and VCPU_is_up may return false, before the
+- * VCPU stops running (i.e., the command is asynchronous). It is a good
+- * idea to ensure that the VCPU has entered a non-critical loop before
+- * bringing it down. Alternatively, this operation is guaranteed
+- * synchronous if invoked by the VCPU itself.
+- * 2. After a VCPU is initialised, there is currently no way to drop all its
+- * references to domain memory. Even a VCPU that is down still holds
+- * memory references via its pagetable base pointer and GDT. It is good
+- * practise to move a VCPU onto an 'idle' or default page table, LDT and
+- * GDT before bringing it down.
++ * 1. This operation may return, and VCPU_is_up may return false, before the
++ * VCPU stops running (i.e., the command is asynchronous). It is a good
++ * idea to ensure that the VCPU has entered a non-critical loop before
++ * bringing it down. Alternatively, this operation is guaranteed
++ * synchronous if invoked by the VCPU itself.
++ * 2. After a VCPU is initialised, there is currently no way to drop all its
++ * references to domain memory. Even a VCPU that is down still holds
++ * memory references via its pagetable base pointer and GDT. It is good
++ * practise to move a VCPU onto an 'idle' or default page table, LDT and
++ * GDT before bringing it down.
+ */
+-#define VCPUOP_down 2
++#define VCPUOP_down 2
+
+ /* Returns 1 if the given VCPU is up. */
+-#define VCPUOP_is_up 3
++#define VCPUOP_is_up 3
+
+ /*
+ * Return information about the state and running time of a VCPU.
+ * @extra_arg == pointer to vcpu_runstate_info structure.
+ */
+-#define VCPUOP_get_runstate_info 4
++#define VCPUOP_get_runstate_info 4
+ struct vcpu_runstate_info {
+- /* VCPU's current state (RUNSTATE_*). */
+- int state;
+- /* When was current state entered (system time, ns)? */
+- uint64_t state_entry_time;
+- /*
+- * Time spent in each RUNSTATE_* (ns). The sum of these times is
+- * guaranteed not to drift from system time.
+- */
+- uint64_t time[4];
++ /* VCPU's current state (RUNSTATE_*). */
++ int state;
++ /* When was current state entered (system time, ns)? */
++ uint64_t state_entry_time;
++ /*
++ * Time spent in each RUNSTATE_* (ns). The sum of these times is
++ * guaranteed not to drift from system time.
++ */
++ uint64_t time[4];
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(vcpu_runstate_info);
++typedef struct vcpu_runstate_info vcpu_runstate_info_t;
++DEFINE_XEN_GUEST_HANDLE(vcpu_runstate_info_t);
+
+ /* VCPU is currently running on a physical CPU. */
+ #define RUNSTATE_running 0
+@@ -108,47 +109,52 @@ DEFINE_GUEST_HANDLE_STRUCT(vcpu_runstate
+ * Register a shared memory area from which the guest may obtain its own
+ * runstate information without needing to execute a hypercall.
+ * Notes:
+- * 1. The registered address may be virtual or physical, depending on the
+- * platform. The virtual address should be registered on x86 systems.
+- * 2. Only one shared area may be registered per VCPU. The shared area is
+- * updated by the hypervisor each time the VCPU is scheduled. Thus
+- * runstate.state will always be RUNSTATE_running and
+- * runstate.state_entry_time will indicate the system time at which the
+- * VCPU was last scheduled to run.
++ * 1. The registered address may be virtual or physical or guest handle,
++ * depending on the platform. Virtual address or guest handle should be
++ * registered on x86 systems.
++ * 2. Only one shared area may be registered per VCPU. The shared area is
++ * updated by the hypervisor each time the VCPU is scheduled. Thus
++ * runstate.state will always be RUNSTATE_running and
++ * runstate.state_entry_time will indicate the system time at which the
++ * VCPU was last scheduled to run.
+ * @extra_arg == pointer to vcpu_register_runstate_memory_area structure.
+ */
+ #define VCPUOP_register_runstate_memory_area 5
+ struct vcpu_register_runstate_memory_area {
+- union {
+- GUEST_HANDLE(vcpu_runstate_info) h;
+- struct vcpu_runstate_info *v;
+- uint64_t p;
+- } addr;
++ union {
++ XEN_GUEST_HANDLE(vcpu_runstate_info_t) h;
++ struct vcpu_runstate_info *v;
++ uint64_t p;
++ } addr;
+ };
++typedef struct vcpu_register_runstate_memory_area vcpu_register_runstate_memory_area_t;
++DEFINE_XEN_GUEST_HANDLE(vcpu_register_runstate_memory_area_t);
+
+ /*
+ * Set or stop a VCPU's periodic timer. Every VCPU has one periodic timer
+ * which can be set via these commands. Periods smaller than one millisecond
+ * may not be supported.
+ */
+-#define VCPUOP_set_periodic_timer 6 /* arg == vcpu_set_periodic_timer_t */
+-#define VCPUOP_stop_periodic_timer 7 /* arg == NULL */
++#define VCPUOP_set_periodic_timer 6 /* arg == vcpu_set_periodic_timer_t */
++#define VCPUOP_stop_periodic_timer 7 /* arg == NULL */
+ struct vcpu_set_periodic_timer {
+- uint64_t period_ns;
++ uint64_t period_ns;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(vcpu_set_periodic_timer);
++typedef struct vcpu_set_periodic_timer vcpu_set_periodic_timer_t;
++DEFINE_XEN_GUEST_HANDLE(vcpu_set_periodic_timer_t);
+
+ /*
+ * Set or stop a VCPU's single-shot timer. Every VCPU has one single-shot
+ * timer which can be set via these commands.
+ */
+-#define VCPUOP_set_singleshot_timer 8 /* arg == vcpu_set_singleshot_timer_t */
++#define VCPUOP_set_singleshot_timer 8 /* arg == vcpu_set_singleshot_timer_t */
+ #define VCPUOP_stop_singleshot_timer 9 /* arg == NULL */
+ struct vcpu_set_singleshot_timer {
+- uint64_t timeout_abs_ns;
+- uint32_t flags; /* VCPU_SSHOTTMR_??? */
++ uint64_t timeout_abs_ns; /* Absolute system time value in nanoseconds. */
++ uint32_t flags; /* VCPU_SSHOTTMR_??? */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(vcpu_set_singleshot_timer);
++typedef struct vcpu_set_singleshot_timer vcpu_set_singleshot_timer_t;
++DEFINE_XEN_GUEST_HANDLE(vcpu_set_singleshot_timer_t);
+
+ /* Flags to VCPUOP_set_singleshot_timer. */
+ /* Require the timeout to be in the future (return -ETIME if it's passed). */
+@@ -161,13 +167,47 @@ DEFINE_GUEST_HANDLE_STRUCT(vcpu_set_sing
+ * structure in a convenient place, such as in a per-cpu data area.
+ * The pointer need not be page aligned, but the structure must not
+ * cross a page boundary.
++ *
++ * This may be called only once per vcpu.
+ */
+-#define VCPUOP_register_vcpu_info 10 /* arg == struct vcpu_info */
++#define VCPUOP_register_vcpu_info 10 /* arg == vcpu_register_vcpu_info_t */
+ struct vcpu_register_vcpu_info {
+ uint64_t mfn; /* mfn of page to place vcpu_info */
+ uint32_t offset; /* offset within page */
+ uint32_t rsvd; /* unused */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(vcpu_register_vcpu_info);
++typedef struct vcpu_register_vcpu_info vcpu_register_vcpu_info_t;
++DEFINE_XEN_GUEST_HANDLE(vcpu_register_vcpu_info_t);
++
++/* Send an NMI to the specified VCPU. @extra_arg == NULL. */
++#define VCPUOP_send_nmi 11
++
++/*
++ * Get the physical ID information for a pinned vcpu's underlying physical
++ * processor. The physical ID informmation is architecture-specific.
++ * On x86: id[31:0]=apic_id, id[63:32]=acpi_id, and all values 0xff and
++ * greater are reserved.
++ * This command returns -EINVAL if it is not a valid operation for this VCPU.
++ */
++#define VCPUOP_get_physid 12 /* arg == vcpu_get_physid_t */
++struct vcpu_get_physid {
++ uint64_t phys_id;
++};
++typedef struct vcpu_get_physid vcpu_get_physid_t;
++DEFINE_XEN_GUEST_HANDLE(vcpu_get_physid_t);
++#define xen_vcpu_physid_to_x86_apicid(physid) \
++ ((((uint32_t)(physid)) >= 0xff) ? 0xff : ((uint8_t)(physid)))
++#define xen_vcpu_physid_to_x86_acpiid(physid) \
++ ((((uint32_t)((physid)>>32)) >= 0xff) ? 0xff : ((uint8_t)((physid)>>32)))
+
+ #endif /* __XEN_PUBLIC_VCPU_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/version.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/version.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/version.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,6 +3,24 @@
+ *
+ * Xen version, type, and compile information.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2005, Nguyen Anh Quynh <aquynh@gmail.com>
+ * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
+ */
+@@ -10,17 +28,15 @@
+ #ifndef __XEN_PUBLIC_VERSION_H__
+ #define __XEN_PUBLIC_VERSION_H__
+
+-/* NB. All ops return zero on success, except XENVER_version. */
++/* NB. All ops return zero on success, except XENVER_{version,pagesize} */
+
+ /* arg == NULL; returns major:minor (16:16). */
+ #define XENVER_version 0
+
+ /* arg == xen_extraversion_t. */
+ #define XENVER_extraversion 1
+-struct xen_extraversion {
+- char extraversion[16];
+-};
+-#define XEN_EXTRAVERSION_LEN (sizeof(struct xen_extraversion))
++typedef char xen_extraversion_t[16];
++#define XEN_EXTRAVERSION_LEN (sizeof(xen_extraversion_t))
+
+ /* arg == xen_compile_info_t. */
+ #define XENVER_compile_info 2
+@@ -30,31 +46,46 @@ struct xen_compile_info {
+ char compile_domain[32];
+ char compile_date[32];
+ };
++typedef struct xen_compile_info xen_compile_info_t;
+
+ #define XENVER_capabilities 3
+-struct xen_capabilities_info {
+- char info[1024];
+-};
+-#define XEN_CAPABILITIES_INFO_LEN (sizeof(struct xen_capabilities_info))
++typedef char xen_capabilities_info_t[1024];
++#define XEN_CAPABILITIES_INFO_LEN (sizeof(xen_capabilities_info_t))
+
+ #define XENVER_changeset 4
+-struct xen_changeset_info {
+- char info[64];
+-};
+-#define XEN_CHANGESET_INFO_LEN (sizeof(struct xen_changeset_info))
++typedef char xen_changeset_info_t[64];
++#define XEN_CHANGESET_INFO_LEN (sizeof(xen_changeset_info_t))
+
+ #define XENVER_platform_parameters 5
+ struct xen_platform_parameters {
+ unsigned long virt_start;
+ };
++typedef struct xen_platform_parameters xen_platform_parameters_t;
+
+ #define XENVER_get_features 6
+ struct xen_feature_info {
+ unsigned int submap_idx; /* IN: which 32-bit submap to return */
+ uint32_t submap; /* OUT: 32-bit submap */
+ };
++typedef struct xen_feature_info xen_feature_info_t;
+
+ /* Declares the features reported by XENVER_get_features. */
+ #include "features.h"
+
++/* arg == NULL; returns host memory page size. */
++#define XENVER_pagesize 7
++
++/* arg == xen_domain_handle_t. */
++#define XENVER_guest_handle 8
++
+ #endif /* __XEN_PUBLIC_VERSION_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/interface/xen.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/interface/xen.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/interface/xen.h 2008-11-25 12:35:56.000000000 +0100
+@@ -3,35 +3,68 @@
+ *
+ * Guest OS interface to Xen.
+ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to
++ * deal in the Software without restriction, including without limitation the
++ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
++ * sell copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
++ * DEALINGS IN THE SOFTWARE.
++ *
+ * Copyright (c) 2004, K A Fraser
+ */
+
+ #ifndef __XEN_PUBLIC_XEN_H__
+ #define __XEN_PUBLIC_XEN_H__
+
+-#include <asm/xen/interface.h>
++#include "xen-compat.h"
++#ifdef CONFIG_PARAVIRT_XEN
+ #include <asm/pvclock-abi.h>
++#endif
+
+-/*
+- * XEN "SYSTEM CALLS" (a.k.a. HYPERCALLS).
+- */
++#if defined(__i386__) || defined(__x86_64__)
++#include "arch-x86/xen.h"
++#elif defined(__ia64__)
++#include "arch-ia64.h"
++#else
++#error "Unsupported architecture"
++#endif
++
++#ifndef __ASSEMBLY__
++/* Guest handles for primitive C types. */
++DEFINE_XEN_GUEST_HANDLE(char);
++__DEFINE_XEN_GUEST_HANDLE(uchar, unsigned char);
++DEFINE_XEN_GUEST_HANDLE(int);
++__DEFINE_XEN_GUEST_HANDLE(uint, unsigned int);
++DEFINE_XEN_GUEST_HANDLE(long);
++__DEFINE_XEN_GUEST_HANDLE(ulong, unsigned long);
++DEFINE_XEN_GUEST_HANDLE(void);
++
++DEFINE_XEN_GUEST_HANDLE(xen_pfn_t);
++#endif
+
+ /*
+- * x86_32: EAX = vector; EBX, ECX, EDX, ESI, EDI = args 1, 2, 3, 4, 5.
+- * EAX = return value
+- * (argument registers may be clobbered on return)
+- * x86_64: RAX = vector; RDI, RSI, RDX, R10, R8, R9 = args 1, 2, 3, 4, 5, 6.
+- * RAX = return value
+- * (argument registers not clobbered on return; RCX, R11 are)
++ * HYPERCALLS
+ */
++
+ #define __HYPERVISOR_set_trap_table 0
+ #define __HYPERVISOR_mmu_update 1
+ #define __HYPERVISOR_set_gdt 2
+ #define __HYPERVISOR_stack_switch 3
+ #define __HYPERVISOR_set_callbacks 4
+ #define __HYPERVISOR_fpu_taskswitch 5
+-#define __HYPERVISOR_sched_op 6
+-#define __HYPERVISOR_dom0_op 7
++#define __HYPERVISOR_sched_op_compat 6 /* compat since 0x00030101 */
++#define __HYPERVISOR_platform_op 7
+ #define __HYPERVISOR_set_debugreg 8
+ #define __HYPERVISOR_get_debugreg 9
+ #define __HYPERVISOR_update_descriptor 10
+@@ -39,10 +72,10 @@
+ #define __HYPERVISOR_multicall 13
+ #define __HYPERVISOR_update_va_mapping 14
+ #define __HYPERVISOR_set_timer_op 15
+-#define __HYPERVISOR_event_channel_op_compat 16
++#define __HYPERVISOR_event_channel_op_compat 16 /* compat since 0x00030202 */
+ #define __HYPERVISOR_xen_version 17
+ #define __HYPERVISOR_console_io 18
+-#define __HYPERVISOR_physdev_op_compat 19
++#define __HYPERVISOR_physdev_op_compat 19 /* compat since 0x00030202 */
+ #define __HYPERVISOR_grant_table_op 20
+ #define __HYPERVISOR_vm_assist 21
+ #define __HYPERVISOR_update_va_mapping_otherdomain 22
+@@ -50,14 +83,17 @@
+ #define __HYPERVISOR_vcpu_op 24
+ #define __HYPERVISOR_set_segment_base 25 /* x86/64 only */
+ #define __HYPERVISOR_mmuext_op 26
+-#define __HYPERVISOR_acm_op 27
++#define __HYPERVISOR_xsm_op 27
+ #define __HYPERVISOR_nmi_op 28
+-#define __HYPERVISOR_sched_op_new 29
++#define __HYPERVISOR_sched_op 29
+ #define __HYPERVISOR_callback_op 30
+ #define __HYPERVISOR_xenoprof_op 31
+ #define __HYPERVISOR_event_channel_op 32
+ #define __HYPERVISOR_physdev_op 33
+ #define __HYPERVISOR_hvm_op 34
++#define __HYPERVISOR_sysctl 35
++#define __HYPERVISOR_domctl 36
++#define __HYPERVISOR_kexec_op 37
+
+ /* Architecture-specific hypercall definitions. */
+ #define __HYPERVISOR_arch_0 48
+@@ -70,15 +106,46 @@
+ #define __HYPERVISOR_arch_7 55
+
+ /*
++ * HYPERCALL COMPATIBILITY.
++ */
++
++/* New sched_op hypercall introduced in 0x00030101. */
++#if __XEN_INTERFACE_VERSION__ < 0x00030101
++#undef __HYPERVISOR_sched_op
++#define __HYPERVISOR_sched_op __HYPERVISOR_sched_op_compat
++#endif
++
++/* New event-channel and physdev hypercalls introduced in 0x00030202. */
++#if __XEN_INTERFACE_VERSION__ < 0x00030202
++#undef __HYPERVISOR_event_channel_op
++#define __HYPERVISOR_event_channel_op __HYPERVISOR_event_channel_op_compat
++#undef __HYPERVISOR_physdev_op
++#define __HYPERVISOR_physdev_op __HYPERVISOR_physdev_op_compat
++#endif
++
++/* New platform_op hypercall introduced in 0x00030204. */
++#if __XEN_INTERFACE_VERSION__ < 0x00030204
++#define __HYPERVISOR_dom0_op __HYPERVISOR_platform_op
++#endif
++
++/*
+ * VIRTUAL INTERRUPTS
+ *
+ * Virtual interrupts that a guest OS may receive from Xen.
+- */
+-#define VIRQ_TIMER 0 /* Timebase update, and/or requested timeout. */
+-#define VIRQ_DEBUG 1 /* Request guest to dump debug info. */
+-#define VIRQ_CONSOLE 2 /* (DOM0) Bytes received on emergency console. */
+-#define VIRQ_DOM_EXC 3 /* (DOM0) Exceptional event for some domain. */
+-#define VIRQ_DEBUGGER 6 /* (DOM0) A domain has paused for debugging. */
++ *
++ * In the side comments, 'V.' denotes a per-VCPU VIRQ while 'G.' denotes a
++ * global VIRQ. The former can be bound once per VCPU and cannot be re-bound.
++ * The latter can be allocated only once per guest: they must initially be
++ * allocated to VCPU0 but can subsequently be re-bound.
++ */
++#define VIRQ_TIMER 0 /* V. Timebase update, and/or requested timeout. */
++#define VIRQ_DEBUG 1 /* V. Request guest to dump debug info. */
++#define VIRQ_CONSOLE 2 /* G. (DOM0) Bytes received on emergency console. */
++#define VIRQ_DOM_EXC 3 /* G. (DOM0) Exceptional event for some domain. */
++#define VIRQ_TBUF 4 /* G. (DOM0) Trace buffer has records available. */
++#define VIRQ_DEBUGGER 6 /* G. (DOM0) A domain has paused for debugging. */
++#define VIRQ_XENOPROF 7 /* V. XenOprofile interrupt: new sample available */
++#define VIRQ_CON_RING 8 /* G. (DOM0) Bytes received on console */
+
+ /* Architecture-specific VIRQ definitions. */
+ #define VIRQ_ARCH_0 16
+@@ -91,6 +158,7 @@
+ #define VIRQ_ARCH_7 23
+
+ #define NR_VIRQS 24
++
+ /*
+ * MMU-UPDATE REQUESTS
+ *
+@@ -166,6 +234,13 @@
+ * cmd: MMUEXT_SET_LDT
+ * linear_addr: Linear address of LDT base (NB. must be page-aligned).
+ * nr_ents: Number of entries in LDT.
++ *
++ * cmd: MMUEXT_CLEAR_PAGE
++ * mfn: Machine frame number to be cleared.
++ *
++ * cmd: MMUEXT_COPY_PAGE
++ * mfn: Machine frame number of the destination page.
++ * src_mfn: Machine frame number of the source page.
+ */
+ #define MMUEXT_PIN_L1_TABLE 0
+ #define MMUEXT_PIN_L2_TABLE 1
+@@ -182,24 +257,34 @@
+ #define MMUEXT_FLUSH_CACHE 12
+ #define MMUEXT_SET_LDT 13
+ #define MMUEXT_NEW_USER_BASEPTR 15
++#define MMUEXT_CLEAR_PAGE 16
++#define MMUEXT_COPY_PAGE 17
+
+ #ifndef __ASSEMBLY__
+ struct mmuext_op {
+- unsigned int cmd;
+- union {
+- /* [UN]PIN_TABLE, NEW_BASEPTR, NEW_USER_BASEPTR */
+- unsigned long mfn;
+- /* INVLPG_LOCAL, INVLPG_ALL, SET_LDT */
+- unsigned long linear_addr;
+- } arg1;
+- union {
+- /* SET_LDT */
+- unsigned int nr_ents;
+- /* TLB_FLUSH_MULTI, INVLPG_MULTI */
+- void *vcpumask;
+- } arg2;
++ unsigned int cmd;
++ union {
++ /* [UN]PIN_TABLE, NEW_BASEPTR, NEW_USER_BASEPTR
++ * CLEAR_PAGE, COPY_PAGE */
++ xen_pfn_t mfn;
++ /* INVLPG_LOCAL, INVLPG_ALL, SET_LDT */
++ unsigned long linear_addr;
++ } arg1;
++ union {
++ /* SET_LDT */
++ unsigned int nr_ents;
++ /* TLB_FLUSH_MULTI, INVLPG_MULTI */
++#if __XEN_INTERFACE_VERSION__ >= 0x00030205
++ XEN_GUEST_HANDLE(void) vcpumask;
++#else
++ void *vcpumask;
++#endif
++ /* COPY_PAGE */
++ xen_pfn_t src_mfn;
++ } arg2;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(mmuext_op);
++typedef struct mmuext_op mmuext_op_t;
++DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
+ #endif
+
+ /* These are passed as 'flags' to update_va_mapping. They can be ORed. */
+@@ -224,11 +309,24 @@ DEFINE_GUEST_HANDLE_STRUCT(mmuext_op);
+ */
+ #define VMASST_CMD_enable 0
+ #define VMASST_CMD_disable 1
++
++/* x86/32 guests: simulate full 4GB segment limits. */
+ #define VMASST_TYPE_4gb_segments 0
++
++/* x86/32 guests: trap (vector 15) whenever above vmassist is used. */
+ #define VMASST_TYPE_4gb_segments_notify 1
++
++/*
++ * x86 guests: support writes to bottom-level PTEs.
++ * NB1. Page-directory entries cannot be written.
++ * NB2. Guest must continue to remove all writable mappings of PTEs.
++ */
+ #define VMASST_TYPE_writable_pagetables 2
++
++/* x86/PAE guests: support PDPTs above 4GB. */
+ #define VMASST_TYPE_pae_extended_cr3 3
+-#define MAX_VMASST_TYPE 3
++
++#define MAX_VMASST_TYPE 3
+
+ #ifndef __ASSEMBLY__
+
+@@ -267,18 +365,19 @@ struct mmu_update {
+ uint64_t ptr; /* Machine address of PTE. */
+ uint64_t val; /* New contents of PTE. */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(mmu_update);
++typedef struct mmu_update mmu_update_t;
++DEFINE_XEN_GUEST_HANDLE(mmu_update_t);
+
+ /*
+ * Send an array of these to HYPERVISOR_multicall().
+ * NB. The fields are natural register size for this architecture.
+ */
+ struct multicall_entry {
+- unsigned long op;
+- long result;
++ unsigned long op, result;
+ unsigned long args[6];
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(multicall_entry);
++typedef struct multicall_entry multicall_entry_t;
++DEFINE_XEN_GUEST_HANDLE(multicall_entry_t);
+
+ /*
+ * Event channel endpoints per domain:
+@@ -287,173 +386,240 @@ DEFINE_GUEST_HANDLE_STRUCT(multicall_ent
+ #define NR_EVENT_CHANNELS (sizeof(unsigned long) * sizeof(unsigned long) * 64)
+
+ struct vcpu_time_info {
+- /*
+- * Updates to the following values are preceded and followed
+- * by an increment of 'version'. The guest can therefore
+- * detect updates by looking for changes to 'version'. If the
+- * least-significant bit of the version number is set then an
+- * update is in progress and the guest must wait to read a
+- * consistent set of values. The correct way to interact with
+- * the version number is similar to Linux's seqlock: see the
+- * implementations of read_seqbegin/read_seqretry.
+- */
+- uint32_t version;
+- uint32_t pad0;
+- uint64_t tsc_timestamp; /* TSC at last update of time vals. */
+- uint64_t system_time; /* Time, in nanosecs, since boot. */
+- /*
+- * Current system time:
+- * system_time + ((tsc - tsc_timestamp) << tsc_shift) * tsc_to_system_mul
+- * CPU frequency (Hz):
+- * ((10^9 << 32) / tsc_to_system_mul) >> tsc_shift
+- */
+- uint32_t tsc_to_system_mul;
+- int8_t tsc_shift;
+- int8_t pad1[3];
++ /*
++ * Updates to the following values are preceded and followed by an
++ * increment of 'version'. The guest can therefore detect updates by
++ * looking for changes to 'version'. If the least-significant bit of
++ * the version number is set then an update is in progress and the guest
++ * must wait to read a consistent set of values.
++ * The correct way to interact with the version number is similar to
++ * Linux's seqlock: see the implementations of read_seqbegin/read_seqretry.
++ */
++ uint32_t version;
++ uint32_t pad0;
++ uint64_t tsc_timestamp; /* TSC at last update of time vals. */
++ uint64_t system_time; /* Time, in nanosecs, since boot. */
++ /*
++ * Current system time:
++ * system_time +
++ * ((((tsc - tsc_timestamp) << tsc_shift) * tsc_to_system_mul) >> 32)
++ * CPU frequency (Hz):
++ * ((10^9 << 32) / tsc_to_system_mul) >> tsc_shift
++ */
++ uint32_t tsc_to_system_mul;
++ int8_t tsc_shift;
++ int8_t pad1[3];
+ }; /* 32 bytes */
++typedef struct vcpu_time_info vcpu_time_info_t;
+
+ struct vcpu_info {
+- /*
+- * 'evtchn_upcall_pending' is written non-zero by Xen to indicate
+- * a pending notification for a particular VCPU. It is then cleared
+- * by the guest OS /before/ checking for pending work, thus avoiding
+- * a set-and-check race. Note that the mask is only accessed by Xen
+- * on the CPU that is currently hosting the VCPU. This means that the
+- * pending and mask flags can be updated by the guest without special
+- * synchronisation (i.e., no need for the x86 LOCK prefix).
+- * This may seem suboptimal because if the pending flag is set by
+- * a different CPU then an IPI may be scheduled even when the mask
+- * is set. However, note:
+- * 1. The task of 'interrupt holdoff' is covered by the per-event-
+- * channel mask bits. A 'noisy' event that is continually being
+- * triggered can be masked at source at this very precise
+- * granularity.
+- * 2. The main purpose of the per-VCPU mask is therefore to restrict
+- * reentrant execution: whether for concurrency control, or to
+- * prevent unbounded stack usage. Whatever the purpose, we expect
+- * that the mask will be asserted only for short periods at a time,
+- * and so the likelihood of a 'spurious' IPI is suitably small.
+- * The mask is read before making an event upcall to the guest: a
+- * non-zero mask therefore guarantees that the VCPU will not receive
+- * an upcall activation. The mask is cleared when the VCPU requests
+- * to block: this avoids wakeup-waiting races.
+- */
+- uint8_t evtchn_upcall_pending;
+- uint8_t evtchn_upcall_mask;
+- unsigned long evtchn_pending_sel;
+- struct arch_vcpu_info arch;
+- struct pvclock_vcpu_time_info time;
++ /*
++ * 'evtchn_upcall_pending' is written non-zero by Xen to indicate
++ * a pending notification for a particular VCPU. It is then cleared
++ * by the guest OS /before/ checking for pending work, thus avoiding
++ * a set-and-check race. Note that the mask is only accessed by Xen
++ * on the CPU that is currently hosting the VCPU. This means that the
++ * pending and mask flags can be updated by the guest without special
++ * synchronisation (i.e., no need for the x86 LOCK prefix).
++ * This may seem suboptimal because if the pending flag is set by
++ * a different CPU then an IPI may be scheduled even when the mask
++ * is set. However, note:
++ * 1. The task of 'interrupt holdoff' is covered by the per-event-
++ * channel mask bits. A 'noisy' event that is continually being
++ * triggered can be masked at source at this very precise
++ * granularity.
++ * 2. The main purpose of the per-VCPU mask is therefore to restrict
++ * reentrant execution: whether for concurrency control, or to
++ * prevent unbounded stack usage. Whatever the purpose, we expect
++ * that the mask will be asserted only for short periods at a time,
++ * and so the likelihood of a 'spurious' IPI is suitably small.
++ * The mask is read before making an event upcall to the guest: a
++ * non-zero mask therefore guarantees that the VCPU will not receive
++ * an upcall activation. The mask is cleared when the VCPU requests
++ * to block: this avoids wakeup-waiting races.
++ */
++ uint8_t evtchn_upcall_pending;
++ uint8_t evtchn_upcall_mask;
++ unsigned long evtchn_pending_sel;
++ struct arch_vcpu_info arch;
++#ifdef CONFIG_PARAVIRT_XEN
++ struct pvclock_vcpu_time_info time;
++#else
++ struct vcpu_time_info time;
++#endif
+ }; /* 64 bytes (x86) */
++#ifndef __XEN__
++typedef struct vcpu_info vcpu_info_t;
++#endif
+
+ /*
+ * Xen/kernel shared data -- pointer provided in start_info.
+- * NB. We expect that this struct is smaller than a page.
++ *
++ * This structure is defined to be both smaller than a page, and the
++ * only data on the shared page, but may vary in actual size even within
++ * compatible Xen versions; guests should not rely on the size
++ * of this structure remaining constant.
+ */
+ struct shared_info {
+- struct vcpu_info vcpu_info[MAX_VIRT_CPUS];
++ struct vcpu_info vcpu_info[MAX_VIRT_CPUS];
+
+- /*
+- * A domain can create "event channels" on which it can send and receive
+- * asynchronous event notifications. There are three classes of event that
+- * are delivered by this mechanism:
+- * 1. Bi-directional inter- and intra-domain connections. Domains must
+- * arrange out-of-band to set up a connection (usually by allocating
+- * an unbound 'listener' port and avertising that via a storage service
+- * such as xenstore).
+- * 2. Physical interrupts. A domain with suitable hardware-access
+- * privileges can bind an event-channel port to a physical interrupt
+- * source.
+- * 3. Virtual interrupts ('events'). A domain can bind an event-channel
+- * port to a virtual interrupt source, such as the virtual-timer
+- * device or the emergency console.
+- *
+- * Event channels are addressed by a "port index". Each channel is
+- * associated with two bits of information:
+- * 1. PENDING -- notifies the domain that there is a pending notification
+- * to be processed. This bit is cleared by the guest.
+- * 2. MASK -- if this bit is clear then a 0->1 transition of PENDING
+- * will cause an asynchronous upcall to be scheduled. This bit is only
+- * updated by the guest. It is read-only within Xen. If a channel
+- * becomes pending while the channel is masked then the 'edge' is lost
+- * (i.e., when the channel is unmasked, the guest must manually handle
+- * pending notifications as no upcall will be scheduled by Xen).
+- *
+- * To expedite scanning of pending notifications, any 0->1 pending
+- * transition on an unmasked channel causes a corresponding bit in a
+- * per-vcpu selector word to be set. Each bit in the selector covers a
+- * 'C long' in the PENDING bitfield array.
+- */
+- unsigned long evtchn_pending[sizeof(unsigned long) * 8];
+- unsigned long evtchn_mask[sizeof(unsigned long) * 8];
+-
+- /*
+- * Wallclock time: updated only by control software. Guests should base
+- * their gettimeofday() syscall on this wallclock-base value.
+- */
+- struct pvclock_wall_clock wc;
++ /*
++ * A domain can create "event channels" on which it can send and receive
++ * asynchronous event notifications. There are three classes of event that
++ * are delivered by this mechanism:
++ * 1. Bi-directional inter- and intra-domain connections. Domains must
++ * arrange out-of-band to set up a connection (usually by allocating
++ * an unbound 'listener' port and avertising that via a storage service
++ * such as xenstore).
++ * 2. Physical interrupts. A domain with suitable hardware-access
++ * privileges can bind an event-channel port to a physical interrupt
++ * source.
++ * 3. Virtual interrupts ('events'). A domain can bind an event-channel
++ * port to a virtual interrupt source, such as the virtual-timer
++ * device or the emergency console.
++ *
++ * Event channels are addressed by a "port index". Each channel is
++ * associated with two bits of information:
++ * 1. PENDING -- notifies the domain that there is a pending notification
++ * to be processed. This bit is cleared by the guest.
++ * 2. MASK -- if this bit is clear then a 0->1 transition of PENDING
++ * will cause an asynchronous upcall to be scheduled. This bit is only
++ * updated by the guest. It is read-only within Xen. If a channel
++ * becomes pending while the channel is masked then the 'edge' is lost
++ * (i.e., when the channel is unmasked, the guest must manually handle
++ * pending notifications as no upcall will be scheduled by Xen).
++ *
++ * To expedite scanning of pending notifications, any 0->1 pending
++ * transition on an unmasked channel causes a corresponding bit in a
++ * per-vcpu selector word to be set. Each bit in the selector covers a
++ * 'C long' in the PENDING bitfield array.
++ */
++ unsigned long evtchn_pending[sizeof(unsigned long) * 8];
++ unsigned long evtchn_mask[sizeof(unsigned long) * 8];
++
++ /*
++ * Wallclock time: updated only by control software. Guests should base
++ * their gettimeofday() syscall on this wallclock-base value.
++ */
++#ifdef CONFIG_PARAVIRT_XEN
++ struct pvclock_wall_clock wc;
++#else
++ uint32_t wc_version; /* Version counter: see vcpu_time_info_t. */
++ uint32_t wc_sec; /* Secs 00:00:00 UTC, Jan 1, 1970. */
++ uint32_t wc_nsec; /* Nsecs 00:00:00 UTC, Jan 1, 1970. */
++#endif
+
+- struct arch_shared_info arch;
++ struct arch_shared_info arch;
+
+ };
++#ifndef __XEN__
++typedef struct shared_info shared_info_t;
++#endif
+
+ /*
+- * Start-of-day memory layout for the initial domain (DOM0):
++ * Start-of-day memory layout:
+ * 1. The domain is started within contiguous virtual-memory region.
+- * 2. The contiguous region begins and ends on an aligned 4MB boundary.
+- * 3. The region start corresponds to the load address of the OS image.
+- * If the load address is not 4MB aligned then the address is rounded down.
+- * 4. This the order of bootstrap elements in the initial virtual region:
++ * 2. The contiguous region ends on an aligned 4MB boundary.
++ * 3. This the order of bootstrap elements in the initial virtual region:
+ * a. relocated kernel image
+ * b. initial ram disk [mod_start, mod_len]
+ * c. list of allocated page frames [mfn_list, nr_pages]
+ * d. start_info_t structure [register ESI (x86)]
+ * e. bootstrap page tables [pt_base, CR3 (x86)]
+ * f. bootstrap stack [register ESP (x86)]
+- * 5. Bootstrap elements are packed together, but each is 4kB-aligned.
+- * 6. The initial ram disk may be omitted.
+- * 7. The list of page frames forms a contiguous 'pseudo-physical' memory
++ * 4. Bootstrap elements are packed together, but each is 4kB-aligned.
++ * 5. The initial ram disk may be omitted.
++ * 6. The list of page frames forms a contiguous 'pseudo-physical' memory
+ * layout for the domain. In particular, the bootstrap virtual-memory
+ * region is a 1:1 mapping to the first section of the pseudo-physical map.
+- * 8. All bootstrap elements are mapped read-writable for the guest OS. The
++ * 7. All bootstrap elements are mapped read-writable for the guest OS. The
+ * only exception is the bootstrap page table, which is mapped read-only.
+- * 9. There is guaranteed to be at least 512kB padding after the final
++ * 8. There is guaranteed to be at least 512kB padding after the final
+ * bootstrap element. If necessary, the bootstrap virtual region is
+ * extended by an extra 4MB to ensure this.
+ */
+
+ #define MAX_GUEST_CMDLINE 1024
+ struct start_info {
+- /* THE FOLLOWING ARE FILLED IN BOTH ON INITIAL BOOT AND ON RESUME. */
+- char magic[32]; /* "xen-<version>-<platform>". */
+- unsigned long nr_pages; /* Total pages allocated to this domain. */
+- unsigned long shared_info; /* MACHINE address of shared info struct. */
+- uint32_t flags; /* SIF_xxx flags. */
+- unsigned long store_mfn; /* MACHINE page number of shared page. */
+- uint32_t store_evtchn; /* Event channel for store communication. */
+- union {
+- struct {
+- unsigned long mfn; /* MACHINE page number of console page. */
+- uint32_t evtchn; /* Event channel for console page. */
+- } domU;
+- struct {
+- uint32_t info_off; /* Offset of console_info struct. */
+- uint32_t info_size; /* Size of console_info struct from start.*/
+- } dom0;
+- } console;
+- /* THE FOLLOWING ARE ONLY FILLED IN ON INITIAL BOOT (NOT RESUME). */
+- unsigned long pt_base; /* VIRTUAL address of page directory. */
+- unsigned long nr_pt_frames; /* Number of bootstrap p.t. frames. */
+- unsigned long mfn_list; /* VIRTUAL address of page-frame list. */
+- unsigned long mod_start; /* VIRTUAL address of pre-loaded module. */
+- unsigned long mod_len; /* Size (bytes) of pre-loaded module. */
+- int8_t cmd_line[MAX_GUEST_CMDLINE];
++ /* THE FOLLOWING ARE FILLED IN BOTH ON INITIAL BOOT AND ON RESUME. */
++ char magic[32]; /* "xen-<version>-<platform>". */
++ unsigned long nr_pages; /* Total pages allocated to this domain. */
++ unsigned long shared_info; /* MACHINE address of shared info struct. */
++ uint32_t flags; /* SIF_xxx flags. */
++ xen_pfn_t store_mfn; /* MACHINE page number of shared page. */
++ uint32_t store_evtchn; /* Event channel for store communication. */
++ union {
++ struct {
++ xen_pfn_t mfn; /* MACHINE page number of console page. */
++ uint32_t evtchn; /* Event channel for console page. */
++ } domU;
++ struct {
++ uint32_t info_off; /* Offset of console_info struct. */
++ uint32_t info_size; /* Size of console_info struct from start.*/
++ } dom0;
++ } console;
++ /* THE FOLLOWING ARE ONLY FILLED IN ON INITIAL BOOT (NOT RESUME). */
++ unsigned long pt_base; /* VIRTUAL address of page directory. */
++ unsigned long nr_pt_frames; /* Number of bootstrap p.t. frames. */
++ unsigned long mfn_list; /* VIRTUAL address of page-frame list. */
++ unsigned long mod_start; /* VIRTUAL address of pre-loaded module. */
++ unsigned long mod_len; /* Size (bytes) of pre-loaded module. */
++ int8_t cmd_line[MAX_GUEST_CMDLINE];
+ };
++typedef struct start_info start_info_t;
++
++/* New console union for dom0 introduced in 0x00030203. */
++#if __XEN_INTERFACE_VERSION__ < 0x00030203
++#define console_mfn console.domU.mfn
++#define console_evtchn console.domU.evtchn
++#endif
+
+ /* These flags are passed in the 'flags' field of start_info_t. */
+ #define SIF_PRIVILEGED (1<<0) /* Is the domain privileged? */
+ #define SIF_INITDOMAIN (1<<1) /* Is this the initial control domain? */
++#define SIF_PM_MASK (0xFF<<8) /* reserve 1 byte for xen-pm options */
+
+-typedef uint64_t cpumap_t;
++typedef struct dom0_vga_console_info {
++ uint8_t video_type; /* DOM0_VGA_CONSOLE_??? */
++#define XEN_VGATYPE_TEXT_MODE_3 0x03
++#define XEN_VGATYPE_VESA_LFB 0x23
++
++ union {
++ struct {
++ /* Font height, in pixels. */
++ uint16_t font_height;
++ /* Cursor location (column, row). */
++ uint16_t cursor_x, cursor_y;
++ /* Number of rows and columns (dimensions in characters). */
++ uint16_t rows, columns;
++ } text_mode_3;
++
++ struct {
++ /* Width and height, in pixels. */
++ uint16_t width, height;
++ /* Bytes per scan line. */
++ uint16_t bytes_per_line;
++ /* Bits per pixel. */
++ uint16_t bits_per_pixel;
++ /* LFB physical address, and size (in units of 64kB). */
++ uint32_t lfb_base;
++ uint32_t lfb_size;
++ /* RGB mask offsets and sizes, as defined by VBE 1.2+ */
++ uint8_t red_pos, red_size;
++ uint8_t green_pos, green_size;
++ uint8_t blue_pos, blue_size;
++ uint8_t rsvd_pos, rsvd_size;
++#if __XEN_INTERFACE_VERSION__ >= 0x00030206
++ /* VESA capabilities (offset 0xa, VESA command 0x4f00). */
++ uint32_t gbl_caps;
++ /* Mode attributes (offset 0x0, VESA command 0x4f01). */
++ uint16_t mode_attrs;
++#endif
++ } vesa_lfb;
++ } u;
++} dom0_vga_console_info_t;
++#define xen_vga_console_info dom0_vga_console_info
++#define xen_vga_console_info_t dom0_vga_console_info_t
+
+ typedef uint8_t xen_domain_handle_t[16];
+
+@@ -461,6 +627,11 @@ typedef uint8_t xen_domain_handle_t[16];
+ #define __mk_unsigned_long(x) x ## UL
+ #define mk_unsigned_long(x) __mk_unsigned_long(x)
+
++__DEFINE_XEN_GUEST_HANDLE(uint8, uint8_t);
++__DEFINE_XEN_GUEST_HANDLE(uint16, uint16_t);
++__DEFINE_XEN_GUEST_HANDLE(uint32, uint32_t);
++__DEFINE_XEN_GUEST_HANDLE(uint64, uint64_t);
++
+ #else /* __ASSEMBLY__ */
+
+ /* In assembly code we cannot use C numeric constant suffixes. */
+@@ -468,4 +639,24 @@ typedef uint8_t xen_domain_handle_t[16];
+
+ #endif /* !__ASSEMBLY__ */
+
++/* Default definitions for macros used by domctl/sysctl. */
++#if defined(__XEN__) || defined(__XEN_TOOLS__)
++#ifndef uint64_aligned_t
++#define uint64_aligned_t uint64_t
++#endif
++#ifndef XEN_GUEST_HANDLE_64
++#define XEN_GUEST_HANDLE_64(name) XEN_GUEST_HANDLE(name)
++#endif
++#endif
++
+ #endif /* __XEN_PUBLIC_XEN_H__ */
++
++/*
++ * Local variables:
++ * mode: C
++ * c-set-style: "BSD"
++ * c-basic-offset: 4
++ * tab-width: 4
++ * indent-tabs-mode: nil
++ * End:
++ */
+Index: head-2008-11-25/include/xen/xenbus.h
+===================================================================
+--- head-2008-11-25.orig/include/xen/xenbus.h 2008-11-25 12:33:06.000000000 +0100
++++ head-2008-11-25/include/xen/xenbus.h 2008-11-25 12:35:56.000000000 +0100
+@@ -39,6 +39,7 @@
+ #include <linux/mutex.h>
+ #include <linux/completion.h>
+ #include <linux/init.h>
++#include <linux/err.h>
+ #include <xen/interface/xen.h>
+ #include <xen/interface/grant_table.h>
+ #include <xen/interface/io/xenbus.h>
+@@ -55,8 +56,17 @@ struct xenbus_watch
+ /* Callback (executed in a process context with no locks held). */
+ void (*callback)(struct xenbus_watch *,
+ const char **vec, unsigned int len);
++
++ /* See XBWF_ definitions below. */
++ unsigned long flags;
+ };
+
++/*
++ * Execute callback in its own kthread. Useful if the callback is long
++ * running or heavily serialised, to avoid taking out the main xenwatch thread
++ * for a long period of time (or even unwittingly causing a deadlock).
++ */
++#define XBWF_new_thread 1
+
+ /* A xenbus device. */
+ struct xenbus_device {
+@@ -105,27 +115,8 @@ static inline struct xenbus_driver *to_x
+ return container_of(drv, struct xenbus_driver, driver);
+ }
+
+-int __must_check __xenbus_register_frontend(struct xenbus_driver *drv,
+- struct module *owner,
+- const char *mod_name);
+-
+-static inline int __must_check
+-xenbus_register_frontend(struct xenbus_driver *drv)
+-{
+- WARN_ON(drv->owner != THIS_MODULE);
+- return __xenbus_register_frontend(drv, THIS_MODULE, KBUILD_MODNAME);
+-}
+-
+-int __must_check __xenbus_register_backend(struct xenbus_driver *drv,
+- struct module *owner,
+- const char *mod_name);
+-static inline int __must_check
+-xenbus_register_backend(struct xenbus_driver *drv)
+-{
+- WARN_ON(drv->owner != THIS_MODULE);
+- return __xenbus_register_backend(drv, THIS_MODULE, KBUILD_MODNAME);
+-}
+-
++int xenbus_register_frontend(struct xenbus_driver *drv);
++int xenbus_register_backend(struct xenbus_driver *drv);
+ void xenbus_unregister_driver(struct xenbus_driver *drv);
+
+ struct xenbus_transaction
+@@ -136,8 +127,6 @@ struct xenbus_transaction
+ /* Nil transaction ID. */
+ #define XBT_NIL ((struct xenbus_transaction) { 0 })
+
+-int __init xenbus_dev_init(void);
+-
+ char **xenbus_directory(struct xenbus_transaction t,
+ const char *dir, const char *node, unsigned int *num);
+ void *xenbus_read(struct xenbus_transaction t,
+@@ -167,7 +156,6 @@ int xenbus_printf(struct xenbus_transact
+ int xenbus_gather(struct xenbus_transaction t, const char *dir, ...);
+
+ /* notifer routines for when the xenstore comes up */
+-extern int xenstored_ready;
+ int register_xenstore_notifier(struct notifier_block *nb);
+ void unregister_xenstore_notifier(struct notifier_block *nb);
+
+@@ -180,12 +168,9 @@ void xs_suspend_cancel(void);
+ /* Used by xenbus_dev to borrow kernel's store connection. */
+ void *xenbus_dev_request_and_reply(struct xsd_sockmsg *msg);
+
+-struct work_struct;
+-
+ /* Prepare for domain suspend: then resume or cancel the suspend. */
+ void xenbus_suspend(void);
+ void xenbus_resume(void);
+-void xenbus_probe(struct work_struct *);
+ void xenbus_suspend_cancel(void);
+
+ #define XENBUS_IS_ERR_READ(str) ({ \
+@@ -198,38 +183,125 @@ void xenbus_suspend_cancel(void);
+
+ #define XENBUS_EXIST_ERR(err) ((err) == -ENOENT || (err) == -ERANGE)
+
++
++/**
++ * Register a watch on the given path, using the given xenbus_watch structure
++ * for storage, and the given callback function as the callback. Return 0 on
++ * success, or -errno on error. On success, the given path will be saved as
++ * watch->node, and remains the caller's to free. On error, watch->node will
++ * be NULL, the device will switch to XenbusStateClosing, and the error will
++ * be saved in the store.
++ */
+ int xenbus_watch_path(struct xenbus_device *dev, const char *path,
+ struct xenbus_watch *watch,
+ void (*callback)(struct xenbus_watch *,
+ const char **, unsigned int));
+-int xenbus_watch_pathfmt(struct xenbus_device *dev, struct xenbus_watch *watch,
+- void (*callback)(struct xenbus_watch *,
+- const char **, unsigned int),
+- const char *pathfmt, ...)
+- __attribute__ ((format (printf, 4, 5)));
+
++
++/**
++ * Register a watch on the given path/path2, using the given xenbus_watch
++ * structure for storage, and the given callback function as the callback.
++ * Return 0 on success, or -errno on error. On success, the watched path
++ * (path/path2) will be saved as watch->node, and becomes the caller's to
++ * kfree(). On error, watch->node will be NULL, so the caller has nothing to
++ * free, the device will switch to XenbusStateClosing, and the error will be
++ * saved in the store.
++ */
++int xenbus_watch_path2(struct xenbus_device *dev, const char *path,
++ const char *path2, struct xenbus_watch *watch,
++ void (*callback)(struct xenbus_watch *,
++ const char **, unsigned int));
++
++
++/**
++ * Advertise in the store a change of the given driver to the given new_state.
++ * Return 0 on success, or -errno on error. On error, the device will switch
++ * to XenbusStateClosing, and the error will be saved in the store.
++ */
+ int xenbus_switch_state(struct xenbus_device *dev, enum xenbus_state new_state);
++
++
++/**
++ * Grant access to the given ring_mfn to the peer of the given device. Return
++ * 0 on success, or -errno on error. On error, the device will switch to
++ * XenbusStateClosing, and the error will be saved in the store.
++ */
+ int xenbus_grant_ring(struct xenbus_device *dev, unsigned long ring_mfn);
+-int xenbus_map_ring_valloc(struct xenbus_device *dev,
+- int gnt_ref, void **vaddr);
++
++
++/**
++ * Map a page of memory into this domain from another domain's grant table.
++ * xenbus_map_ring_valloc allocates a page of virtual address space, maps the
++ * page to that address, and sets *vaddr to that address.
++ * xenbus_map_ring does not allocate the virtual address space (you must do
++ * this yourself!). It only maps in the page to the specified address.
++ * Returns 0 on success, and GNTST_* (see xen/include/interface/grant_table.h)
++ * or -ENOMEM on error. If an error is returned, device will switch to
++ * XenbusStateClosing and the error message will be saved in XenStore.
++ */
++struct vm_struct *xenbus_map_ring_valloc(struct xenbus_device *dev,
++ int gnt_ref);
+ int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref,
+ grant_handle_t *handle, void *vaddr);
+
+-int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr);
++
++/**
++ * Unmap a page of memory in this domain that was imported from another domain.
++ * Use xenbus_unmap_ring_vfree if you mapped in your memory with
++ * xenbus_map_ring_valloc (it will free the virtual address space).
++ * Returns 0 on success and returns GNTST_* on error
++ * (see xen/include/interface/grant_table.h).
++ */
++int xenbus_unmap_ring_vfree(struct xenbus_device *dev, struct vm_struct *);
+ int xenbus_unmap_ring(struct xenbus_device *dev,
+ grant_handle_t handle, void *vaddr);
+
++
++/**
++ * Allocate an event channel for the given xenbus_device, assigning the newly
++ * created local port to *port. Return 0 on success, or -errno on error. On
++ * error, the device will switch to XenbusStateClosing, and the error will be
++ * saved in the store.
++ */
+ int xenbus_alloc_evtchn(struct xenbus_device *dev, int *port);
+-int xenbus_bind_evtchn(struct xenbus_device *dev, int remote_port, int *port);
++
++
++/**
++ * Free an existing event channel. Returns 0 on success or -errno on error.
++ */
+ int xenbus_free_evtchn(struct xenbus_device *dev, int port);
+
++
++/**
++ * Return the state of the driver rooted at the given store path, or
++ * XenbusStateUnknown if no state can be read.
++ */
+ enum xenbus_state xenbus_read_driver_state(const char *path);
+
+-void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
+-void xenbus_dev_fatal(struct xenbus_device *dev, int err, const char *fmt, ...);
++
++/***
++ * Report the given negative errno into the store, along with the given
++ * formatted message.
++ */
++void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt,
++ ...);
++
++
++/***
++ * Equivalent to xenbus_dev_error(dev, err, fmt, args), followed by
++ * xenbus_switch_state(dev, NULL, XenbusStateClosing) to schedule an orderly
++ * closedown of this driver and its peer.
++ */
++void xenbus_dev_fatal(struct xenbus_device *dev, int err, const char *fmt,
++ ...);
++
++int xenbus_dev_init(void);
+
+ const char *xenbus_strstate(enum xenbus_state state);
+ int xenbus_dev_is_online(struct xenbus_device *dev);
+ int xenbus_frontend_closed(struct xenbus_device *dev);
+
++int xenbus_for_each_backend(void *arg, int (*fn)(struct device *, void *));
++int xenbus_for_each_frontend(void *arg, int (*fn)(struct device *, void *));
++
+ #endif /* _XEN_XENBUS_H */
--- /dev/null
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/163a3807cb1f
+# HG changeset 735+738 patch
+# User Keir Fraser <keir.fraser@citrix.com>
+# Date 1227525200 0
+# Node ID 163a3807cb1fb4f35304a99c63f4deac322df2da
+# Parent 412b24a36929b7cbedc793b4aad06b334bea021b
+Subject: linux: remove sysfs files during balloon module exit
+Patch-mainline: obsolete
+
+Relevant when building pv drivers.
+
+Also adjust some section attributes of the sysfs code.
+
+Signed-off-by: Jan Beulich <jbeulich@novell.com>
+
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/bf8b1ee634e2
+balloon: Fix the build by including <linux/init.h>
+
+Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
+
+Index: head-2008-11-25/drivers/xen/balloon/balloon.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/balloon/balloon.c 2008-07-21 11:00:33.000000000 +0200
++++ head-2008-11-25/drivers/xen/balloon/balloon.c 2008-11-25 13:31:07.000000000 +0100
+@@ -577,8 +577,8 @@ subsys_initcall(balloon_init);
+
+ static void __exit balloon_exit(void)
+ {
+- /* XXX - release balloon here */
+- return;
++ balloon_sysfs_exit();
++ /* XXX - release balloon here */
+ }
+
+ module_exit(balloon_exit);
+Index: head-2008-11-25/drivers/xen/balloon/sysfs.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/balloon/sysfs.c 2008-04-02 12:34:02.000000000 +0200
++++ head-2008-11-25/drivers/xen/balloon/sysfs.c 2008-11-25 13:31:07.000000000 +0100
+@@ -30,6 +30,7 @@
+
+ #include <linux/capability.h>
+ #include <linux/errno.h>
++#include <linux/init.h>
+ #include <linux/stat.h>
+ #include <linux/string.h>
+ #include <linux/sysdev.h>
+@@ -111,7 +112,7 @@ static struct sysdev_class balloon_sysde
+
+ static struct sys_device balloon_sysdev;
+
+-static int register_balloon(struct sys_device *sysdev)
++static int __init register_balloon(struct sys_device *sysdev)
+ {
+ int i, error;
+
+@@ -148,7 +149,7 @@ static int register_balloon(struct sys_d
+ return error;
+ }
+
+-static void unregister_balloon(struct sys_device *sysdev)
++static __exit void unregister_balloon(struct sys_device *sysdev)
+ {
+ int i;
+
+@@ -159,12 +160,12 @@ static void unregister_balloon(struct sy
+ sysdev_class_unregister(&balloon_sysdev_class);
+ }
+
+-int balloon_sysfs_init(void)
++int __init balloon_sysfs_init(void)
+ {
+ return register_balloon(&balloon_sysdev);
+ }
+
+-void balloon_sysfs_exit(void)
++void __exit balloon_sysfs_exit(void)
+ {
+ unregister_balloon(&balloon_sysdev);
+ }
--- /dev/null
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/6bb7f500d5e4
+# HG changeset 737 patch
+# User Keir Fraser <keir.fraser@citrix.com>
+# Date 1227611796 0
+# Node ID 6bb7f500d5e4a68007607863fa7bfe0c69d6eec7
+# Parent 1b68d09b868fdcd724c6b86eb2790748a9fd0bb7
+Subject: kexec: Don't pass limit_pages_to_max_mfn() regions to xen_destroy_contiguous_region().
+Patch-mainline: obsolete
+
+Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-11-25/kernel/kexec.c
+===================================================================
+--- head-2008-11-25.orig/kernel/kexec.c 2008-11-25 12:35:50.000000000 +0100
++++ head-2008-11-25/kernel/kexec.c 2008-11-25 13:31:12.000000000 +0100
+@@ -397,9 +397,6 @@ static void kimage_free_pages(struct pag
+ count = 1 << order;
+ for (i = 0; i < count; i++)
+ ClearPageReserved(page + i);
+-#ifdef CONFIG_XEN
+- xen_destroy_contiguous_region((unsigned long)page_address(page), order);
+-#endif
+ __free_pages(page, order);
+ }
+
--- /dev/null
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/5012c470f875
+# HG changeset 740 patch
+# User Keir Fraser <keir.fraser@citrix.com>
+# Date 1227697833 0
+# Node ID 5012c470f8757e97c2e0f7eccfafcb1e2367443e
+# Parent f236d7def9944909bf40015ff4a08817b0803ed9
+Subject: blkback, blktap: Fix potential resource leak.
+Patch-mainline: obsolete
+
+Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-12-01/drivers/xen/blkback/blkback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/blkback.c 2008-11-10 11:44:21.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkback/blkback.c 2008-12-01 11:21:10.000000000 +0100
+@@ -317,14 +317,14 @@ static int do_block_io_op(blkif_t *blkif
+ if (RING_REQUEST_CONS_OVERFLOW(&blk_rings->common, rc))
+ break;
+
+- pending_req = alloc_req();
+- if (NULL == pending_req) {
+- blkif->st_oo_req++;
++ if (kthread_should_stop()) {
+ more_to_do = 1;
+ break;
+ }
+
+- if (kthread_should_stop()) {
++ pending_req = alloc_req();
++ if (NULL == pending_req) {
++ blkif->st_oo_req++;
+ more_to_do = 1;
+ break;
+ }
+Index: head-2008-12-01/drivers/xen/blktap/blktap.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blktap/blktap.c 2008-11-10 11:44:21.000000000 +0100
++++ head-2008-12-01/drivers/xen/blktap/blktap.c 2008-12-01 11:21:10.000000000 +0100
+@@ -1286,14 +1286,14 @@ static int do_block_io_op(blkif_t *blkif
+ break;
+ }
+
+- pending_req = alloc_req();
+- if (NULL == pending_req) {
+- blkif->st_oo_req++;
++ if (kthread_should_stop()) {
+ more_to_do = 1;
+ break;
+ }
+
+- if (kthread_should_stop()) {
++ pending_req = alloc_req();
++ if (NULL == pending_req) {
++ blkif->st_oo_req++;
+ more_to_do = 1;
+ break;
+ }
--- /dev/null
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/d545a95fca73
+# HG changeset 746+749 patch
+# User Keir Fraser <keir.fraser@citrix.com>
+# Date 1227879027 0
+# Node ID d545a95fca739d0b1963b73a9eb64ea64a244e76
+# Parent 2268be46c75ec6eddb7cd387af8a236a565f6140
+Subject: linux/x86: use shared page indicating the need for an EOI notification
+Patch-mainline: obsolete
+
+Signed-off-by: Jan Beulich <jbeulich@novell.com>
+
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/cdc6729dc702
+Subject: evtchn: Fix the build.
+Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
+
+Index: head-2008-12-01/drivers/xen/core/evtchn.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/evtchn.c 2008-12-01 11:22:35.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/evtchn.c 2008-12-01 11:23:06.000000000 +0100
+@@ -123,9 +123,6 @@ DEFINE_PER_CPU(int, ipi_to_irq[NR_IPIS])
+ /* Reference counts for bindings to IRQs. */
+ static int irq_bindcount[NR_IRQS];
+
+-/* Bitmap indicating which PIRQs require Xen to be notified on unmask. */
+-static DECLARE_BITMAP(pirq_needs_eoi, NR_PIRQS);
+-
+ #ifdef CONFIG_SMP
+
+ static u8 cpu_evtchn[NR_EVENT_CHANNELS];
+@@ -756,16 +753,48 @@ static struct hw_interrupt_type dynirq_t
+ .retrigger = resend_irq_on_evtchn,
+ };
+
+-static inline void pirq_unmask_notify(int irq)
++/* Bitmap indicating which PIRQs require Xen to be notified on unmask. */
++static int pirq_eoi_does_unmask;
++static DECLARE_BITMAP(pirq_needs_eoi, ALIGN(NR_PIRQS, PAGE_SIZE * 8))
++ __attribute__ ((__section__(".bss.page_aligned"), __aligned__(PAGE_SIZE)));
++
++static void pirq_unmask_and_notify(unsigned int evtchn, unsigned int irq)
+ {
+ struct physdev_eoi eoi = { .irq = evtchn_get_xen_pirq(irq) };
+- if (unlikely(test_bit(irq - PIRQ_BASE, pirq_needs_eoi)))
+- VOID(HYPERVISOR_physdev_op(PHYSDEVOP_eoi, &eoi));
++
++ if (pirq_eoi_does_unmask) {
++ if (test_bit(eoi.irq, pirq_needs_eoi))
++ VOID(HYPERVISOR_physdev_op(PHYSDEVOP_eoi, &eoi));
++ else
++ unmask_evtchn(evtchn);
++ } else if (test_bit(irq - PIRQ_BASE, pirq_needs_eoi)) {
++ if (smp_processor_id() != cpu_from_evtchn(evtchn)) {
++ struct evtchn_unmask unmask = { .port = evtchn };
++ struct multicall_entry mcl[2];
++
++ mcl[0].op = __HYPERVISOR_event_channel_op;
++ mcl[0].args[0] = EVTCHNOP_unmask;
++ mcl[0].args[1] = (unsigned long)&unmask;
++ mcl[1].op = __HYPERVISOR_physdev_op;
++ mcl[1].args[0] = PHYSDEVOP_eoi;
++ mcl[1].args[1] = (unsigned long)&eoi;
++
++ if (HYPERVISOR_multicall(mcl, 2))
++ BUG();
++ } else {
++ unmask_evtchn(evtchn);
++ VOID(HYPERVISOR_physdev_op(PHYSDEVOP_eoi, &eoi));
++ }
++ } else
++ unmask_evtchn(evtchn);
+ }
+
+ static inline void pirq_query_unmask(int irq)
+ {
+ struct physdev_irq_status_query irq_status;
++
++ if (pirq_eoi_does_unmask)
++ return;
+ irq_status.irq = evtchn_get_xen_pirq(irq);
+ if (HYPERVISOR_physdev_op(PHYSDEVOP_irq_status_query, &irq_status))
+ irq_status.flags = 0;
+@@ -806,8 +835,7 @@ static unsigned int startup_pirq(unsigne
+ irq_info[irq] = mk_irq_info(IRQT_PIRQ, bind_pirq.pirq, evtchn);
+
+ out:
+- unmask_evtchn(evtchn);
+- pirq_unmask_notify(irq);
++ pirq_unmask_and_notify(evtchn, irq);
+
+ return 0;
+ }
+@@ -859,10 +887,8 @@ static void end_pirq(unsigned int irq)
+ if ((irq_desc[irq].status & (IRQ_DISABLED|IRQ_PENDING)) ==
+ (IRQ_DISABLED|IRQ_PENDING)) {
+ shutdown_pirq(irq);
+- } else if (VALID_EVTCHN(evtchn)) {
+- unmask_evtchn(evtchn);
+- pirq_unmask_notify(irq);
+- }
++ } else if (VALID_EVTCHN(evtchn))
++ pirq_unmask_and_notify(evtchn, irq);
+ }
+
+ static struct hw_interrupt_type pirq_type = {
+@@ -1012,6 +1038,14 @@ void irq_resume(void)
+
+ init_evtchn_cpu_bindings();
+
++ if (pirq_eoi_does_unmask) {
++ struct physdev_pirq_eoi_mfn eoi_mfn;
++
++ eoi_mfn.mfn = virt_to_bus(pirq_needs_eoi) >> PAGE_SHIFT;
++ if (HYPERVISOR_physdev_op(PHYSDEVOP_pirq_eoi_mfn, &eoi_mfn))
++ BUG();
++ }
++
+ /* New event-channel space is not 'live' yet. */
+ for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++)
+ mask_evtchn(evtchn);
+@@ -1098,9 +1132,15 @@ int evtchn_get_xen_pirq(int irq)
+ void __init xen_init_IRQ(void)
+ {
+ unsigned int i;
++ struct physdev_pirq_eoi_mfn eoi_mfn;
+
+ init_evtchn_cpu_bindings();
+
++ BUG_ON(!bitmap_empty(pirq_needs_eoi, PAGE_SIZE * 8));
++ eoi_mfn.mfn = virt_to_bus(pirq_needs_eoi) >> PAGE_SHIFT;
++ if (HYPERVISOR_physdev_op(PHYSDEVOP_pirq_eoi_mfn, &eoi_mfn) == 0)
++ pirq_eoi_does_unmask = 1;
++
+ /* No event channels are 'live' right now. */
+ for (i = 0; i < NR_EVENT_CHANNELS; i++)
+ mask_evtchn(i);
+Index: head-2008-12-01/include/xen/interface/physdev.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/physdev.h 2008-12-01 11:22:59.000000000 +0100
++++ head-2008-12-01/include/xen/interface/physdev.h 2008-12-01 11:23:06.000000000 +0100
+@@ -41,6 +41,21 @@ typedef struct physdev_eoi physdev_eoi_t
+ DEFINE_XEN_GUEST_HANDLE(physdev_eoi_t);
+
+ /*
++ * Register a shared page for the hypervisor to indicate whether the guest
++ * must issue PHYSDEVOP_eoi. The semantics of PHYSDEVOP_eoi change slightly
++ * once the guest used this function in that the associated event channel
++ * will automatically get unmasked. The page registered is used as a bit
++ * array indexed by Xen's PIRQ value.
++ */
++#define PHYSDEVOP_pirq_eoi_mfn 17
++struct physdev_pirq_eoi_mfn {
++ /* IN */
++ xen_pfn_t mfn;
++};
++typedef struct physdev_pirq_eoi_mfn physdev_pirq_eoi_mfn_t;
++DEFINE_XEN_GUEST_HANDLE(physdev_pirq_eoi_mfn_t);
++
++/*
+ * Query the status of an IRQ line.
+ * @arg == pointer to physdev_irq_status_query structure.
+ */
--- /dev/null
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/39a8680e7a70
+# HG changeset 747 patch
+# User Keir Fraser <keir.fraser@citrix.com>
+# Date 1227879058 0
+# Node ID 39a8680e7a70a28ce639c507fb6a9bc0aa7d8f14
+# Parent d545a95fca739d0b1963b73a9eb64ea64a244e76
+Subject: linux/x86: revert the effect of xen_limit_pages_to_max_mfn()
+Patch-mainline: obsolete
+
+Signed-off-by: Jan Beulich <jbeulich@novell.com>
+
+Index: head-2008-12-01/arch/x86/mm/hypervisor.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/hypervisor.c 2008-10-29 09:55:56.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/hypervisor.c 2008-12-01 11:25:57.000000000 +0100
+@@ -374,6 +374,15 @@ void xen_destroy_contiguous_region(unsig
+ }
+ EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region);
+
++static void undo_limit_pages(struct page *pages, unsigned int order)
++{
++ BUG_ON(xen_feature(XENFEAT_auto_translated_physmap));
++ BUG_ON(order > MAX_CONTIG_ORDER);
++ xen_limit_pages_to_max_mfn(pages, order, 0);
++ ClearPageForeign(pages);
++ __free_pages(pages, order);
++}
++
+ int xen_limit_pages_to_max_mfn(
+ struct page *pages, unsigned int order, unsigned int address_bits)
+ {
+@@ -402,16 +411,28 @@ int xen_limit_pages_to_max_mfn(
+ if (unlikely(order > MAX_CONTIG_ORDER))
+ return -ENOMEM;
+
+- bitmap_zero(limit_map, 1U << order);
++ if (address_bits) {
++ if (address_bits < PAGE_SHIFT)
++ return -EINVAL;
++ bitmap_zero(limit_map, 1U << order);
++ } else if (order) {
++ BUILD_BUG_ON(sizeof(pages->index) != sizeof(*limit_map));
++ for (i = 0; i < BITS_TO_LONGS(1U << order); ++i)
++ limit_map[i] = pages[i + 1].index;
++ } else
++ __set_bit(0, limit_map);
++
+ set_xen_guest_handle(exchange.in.extent_start, in_frames);
+ set_xen_guest_handle(exchange.out.extent_start, out_frames);
+
+ /* 0. Scrub the pages. */
+ for (i = 0, n = 0; i < 1U<<order ; i++) {
+ page = &pages[i];
+- if (!(pfn_to_mfn(page_to_pfn(page)) >> (address_bits - PAGE_SHIFT)))
+- continue;
+- __set_bit(i, limit_map);
++ if (address_bits) {
++ if (!(pfn_to_mfn(page_to_pfn(page)) >> (address_bits - PAGE_SHIFT)))
++ continue;
++ __set_bit(i, limit_map);
++ }
+
+ if (!PageHighMem(page))
+ scrub_pages(page_address(page), 1);
+@@ -497,7 +518,19 @@ int xen_limit_pages_to_max_mfn(
+
+ balloon_unlock(flags);
+
+- return success ? 0 : -ENOMEM;
++ if (!success)
++ return -ENOMEM;
++
++ if (address_bits) {
++ if (order) {
++ BUILD_BUG_ON(sizeof(*limit_map) != sizeof(pages->index));
++ for (i = 0; i < BITS_TO_LONGS(1U << order); ++i)
++ pages[i + 1].index = limit_map[i];
++ }
++ SetPageForeign(pages, undo_limit_pages);
++ }
++
++ return 0;
+ }
+ EXPORT_SYMBOL_GPL(xen_limit_pages_to_max_mfn);
+
+Index: head-2008-12-01/arch/x86/mm/pgtable_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable_32-xen.c 2007-10-09 11:48:25.000000000 +0200
++++ head-2008-12-01/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:25:57.000000000 +0100
+@@ -152,6 +152,12 @@ pte_t *pte_alloc_one_kernel(struct mm_st
+ return pte;
+ }
+
++static void _pte_free(struct page *page, unsigned int order)
++{
++ BUG_ON(order);
++ pte_free(page);
++}
++
+ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+ {
+ struct page *pte;
+@@ -162,7 +168,7 @@ struct page *pte_alloc_one(struct mm_str
+ pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+ #endif
+ if (pte) {
+- SetPageForeign(pte, pte_free);
++ SetPageForeign(pte, _pte_free);
+ init_page_count(pte);
+ }
+ return pte;
+Index: head-2008-12-01/arch/x86/mm/pageattr_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pageattr_64-xen.c 2008-07-21 11:00:32.000000000 +0200
++++ head-2008-12-01/arch/x86/mm/pageattr_64-xen.c 2008-12-01 11:25:57.000000000 +0100
+@@ -248,13 +248,19 @@ void _arch_exit_mmap(struct mm_struct *m
+ mm_unpin(mm);
+ }
+
++static void _pte_free(struct page *page, unsigned int order)
++{
++ BUG_ON(order);
++ pte_free(page);
++}
++
+ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+ {
+ struct page *pte;
+
+ pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+ if (pte) {
+- SetPageForeign(pte, pte_free);
++ SetPageForeign(pte, _pte_free);
+ init_page_count(pte);
+ }
+ return pte;
+Index: head-2008-12-01/drivers/xen/core/gnttab.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/gnttab.c 2008-12-01 11:23:17.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/gnttab.c 2008-12-01 11:25:57.000000000 +0100
+@@ -505,8 +505,9 @@ static int gnttab_map(unsigned int start
+ return 0;
+ }
+
+-static void gnttab_page_free(struct page *page)
++static void gnttab_page_free(struct page *page, unsigned int order)
+ {
++ BUG_ON(order);
+ ClearPageForeign(page);
+ gnttab_reset_grant_page(page);
+ put_page(page);
+Index: head-2008-12-01/drivers/xen/netback/netback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/netback.c 2008-12-01 11:23:17.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/netback.c 2008-12-01 11:25:57.000000000 +0100
+@@ -55,7 +55,6 @@ struct netbk_tx_pending_inuse {
+ };
+
+ static void netif_idx_release(u16 pending_idx);
+-static void netif_page_release(struct page *page);
+ static void make_tx_response(netif_t *netif,
+ netif_tx_request_t *txp,
+ s8 st);
+@@ -1436,8 +1435,9 @@ static void netif_idx_release(u16 pendin
+ tasklet_schedule(&net_tx_tasklet);
+ }
+
+-static void netif_page_release(struct page *page)
++static void netif_page_release(struct page *page, unsigned int order)
+ {
++ BUG_ON(order);
+ netif_idx_release(netif_page_index(page));
+ }
+
+Index: head-2008-12-01/include/linux/page-flags.h
+===================================================================
+--- head-2008-12-01.orig/include/linux/page-flags.h 2008-12-01 11:23:17.000000000 +0100
++++ head-2008-12-01/include/linux/page-flags.h 2008-12-01 11:25:57.000000000 +0100
+@@ -275,15 +275,15 @@ CLEARPAGEFLAG(Uptodate, uptodate)
+ #define PageForeign(page) test_bit(PG_foreign, &(page)->flags)
+ #define SetPageForeign(_page, dtor) do { \
+ set_bit(PG_foreign, &(_page)->flags); \
+- BUG_ON((dtor) == (void (*)(struct page *))0); \
++ BUG_ON((dtor) == (void (*)(struct page *, unsigned int))0); \
+ (_page)->index = (long)(dtor); \
+ } while (0)
+ #define ClearPageForeign(page) do { \
+ clear_bit(PG_foreign, &(page)->flags); \
+ (page)->index = 0; \
+ } while (0)
+-#define PageForeignDestructor(_page) \
+- ((void (*)(struct page *))(_page)->index)(_page)
++#define PageForeignDestructor(_page, order) \
++ ((void (*)(struct page *, unsigned int))(_page)->index)(_page, order)
+
+ extern void cancel_dirty_page(struct page *page, unsigned int account_size);
+
+Index: head-2008-12-01/mm/page_alloc.c
+===================================================================
+--- head-2008-12-01.orig/mm/page_alloc.c 2008-12-01 11:23:17.000000000 +0100
++++ head-2008-12-01/mm/page_alloc.c 2008-12-01 11:25:57.000000000 +0100
+@@ -535,7 +535,7 @@ static void __free_pages_ok(struct page
+
+ #ifdef CONFIG_XEN
+ if (PageForeign(page)) {
+- PageForeignDestructor(page);
++ PageForeignDestructor(page, order);
+ return;
+ }
+ #endif
+@@ -1003,7 +1003,7 @@ static void free_hot_cold_page(struct pa
+
+ #ifdef CONFIG_XEN
+ if (PageForeign(page)) {
+- PageForeignDestructor(page);
++ PageForeignDestructor(page, 0);
+ return;
+ }
+ #endif
--- /dev/null
+From: http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/2892ca2b9c17
+# HG changeset 748 patch
+# User Keir Fraser <keir.fraser@citrix.com>
+# Date 1227879081 0
+# Node ID 2892ca2b9c17857f6922e803406711881988d850
+# Parent 39a8680e7a70a28ce639c507fb6a9bc0aa7d8f14
+Subject: linux/x86: cleanup IO-APIC code
+Patch-mainline: obsolete
+
+- get 32-bit code in sync with 64-bit wrt ExtINT pin detection being
+ unnecessary
+- eliminate build warnings resulting from c/s 725
+
+Signed-off-by: Jan Beulich <jbeulich@novell.com>
+
+Index: head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_32-xen.c 2008-11-25 12:22:34.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:28:17.000000000 +0100
+@@ -87,8 +87,10 @@ static inline void xen_io_apic_write(uns
+ int (*ioapic_renumber_irq)(int ioapic, int irq);
+ atomic_t irq_mis_count;
+
++#ifndef CONFIG_XEN
+ /* Where if anywhere is the i8259 connect in external int mode */
+ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
++#endif
+
+ static DEFINE_SPINLOCK(ioapic_lock);
+ static DEFINE_SPINLOCK(vector_lock);
+@@ -793,6 +795,7 @@ static int find_irq_entry(int apic, int
+ return -1;
+ }
+
++#ifndef CONFIG_XEN
+ /*
+ * Find the pin to which IRQ[irq] (ISA) is connected
+ */
+@@ -842,6 +845,7 @@ static int __init find_isa_irq_apic(int
+
+ return -1;
+ }
++#endif
+
+ /*
+ * Find a specific PCI IRQ entry.
+@@ -1687,7 +1691,9 @@ void /*__init*/ print_PIC(void)
+ static void __init enable_IO_APIC(void)
+ {
+ union IO_APIC_reg_01 reg_01;
++#ifndef CONFIG_XEN
+ int i8259_apic, i8259_pin;
++#endif
+ int i, apic;
+ unsigned long flags;
+
+@@ -1708,6 +1714,7 @@ static void __init enable_IO_APIC(void)
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ nr_ioapic_registers[apic] = reg_01.bits.entries+1;
+ }
++#ifndef CONFIG_XEN
+ for(apic = 0; apic < nr_ioapics; apic++) {
+ int pin;
+ /* See if any of the pins is in ExtINT mode */
+@@ -1749,6 +1756,7 @@ static void __init enable_IO_APIC(void)
+ {
+ printk(KERN_WARNING "ExtINT in hardware and MP table differ\n");
+ }
++#endif
+
+ /*
+ * Do not trust the IO-APIC being empty at bootup
+@@ -2517,6 +2525,8 @@ static int __init io_apic_bug_finalize(v
+
+ late_initcall(io_apic_bug_finalize);
+
++#ifndef CONFIG_XEN
++
+ struct sysfs_ioapic_data {
+ struct sys_device dev;
+ struct IO_APIC_route_entry entry[0];
+@@ -2570,10 +2580,8 @@ static int ioapic_resume(struct sys_devi
+
+ static struct sysdev_class ioapic_sysdev_class = {
+ set_kset_name("ioapic"),
+-#ifndef CONFIG_XEN
+ .suspend = ioapic_suspend,
+ .resume = ioapic_resume,
+-#endif
+ };
+
+ static int __init ioapic_init_sysfs(void)
+@@ -2611,6 +2619,8 @@ static int __init ioapic_init_sysfs(void
+
+ device_initcall(ioapic_init_sysfs);
+
++#endif /* CONFIG_XEN */
++
+ /* --------------------------------------------------------------------------
+ ACPI-based IOAPIC Configuration
+ -------------------------------------------------------------------------- */
+Index: head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_64-xen.c 2008-11-25 12:22:34.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:28:17.000000000 +0100
+@@ -2054,6 +2054,8 @@ void __init setup_IO_APIC(void)
+ print_IO_APIC();
+ }
+
++#ifndef CONFIG_XEN
++
+ struct sysfs_ioapic_data {
+ struct sys_device dev;
+ struct IO_APIC_route_entry entry[0];
+@@ -2107,10 +2109,8 @@ static int ioapic_resume(struct sys_devi
+
+ static struct sysdev_class ioapic_sysdev_class = {
+ set_kset_name("ioapic"),
+-#ifndef CONFIG_XEN
+ .suspend = ioapic_suspend,
+ .resume = ioapic_resume,
+-#endif
+ };
+
+ static int __init ioapic_init_sysfs(void)
+@@ -2148,6 +2148,8 @@ static int __init ioapic_init_sysfs(void
+
+ device_initcall(ioapic_init_sysfs);
+
++#endif /* CONFIG_XEN */
++
+ /* --------------------------------------------------------------------------
+ ACPI-based IOAPIC Configuration
+ -------------------------------------------------------------------------- */
--- /dev/null
+Subject: Fix xen configuration.
+From: jbeulich@novell.com
+Patch-mainline: obsolete
+
+Index: head-2008-10-24/arch/x86/Kconfig
+===================================================================
+--- head-2008-10-24.orig/arch/x86/Kconfig 2008-10-24 10:43:32.000000000 +0200
++++ head-2008-10-24/arch/x86/Kconfig 2008-10-24 10:44:52.000000000 +0200
+@@ -137,6 +137,7 @@ config HAVE_CPUMASK_OF_CPU_MAP
+ config ARCH_HIBERNATION_POSSIBLE
+ def_bool y
+ depends on !SMP || !X86_VOYAGER
++ depends on !XEN
+
+ config ARCH_SUSPEND_POSSIBLE
+ def_bool y
+@@ -195,7 +196,7 @@ config X86_HT
+
+ config X86_BIOS_REBOOT
+ bool
+- depends on !X86_VOYAGER
++ depends on !X86_VOYAGER && !XEN
+ default y
+
+ config X86_TRAMPOLINE
+Index: head-2008-10-24/drivers/xen/Kconfig
+===================================================================
+--- head-2008-10-24.orig/drivers/xen/Kconfig 2008-10-24 10:43:32.000000000 +0200
++++ head-2008-10-24/drivers/xen/Kconfig 2008-10-24 10:44:52.000000000 +0200
+@@ -22,6 +22,9 @@ config XEN_PRIVILEGED_GUEST
+
+ config XEN_UNPRIVILEGED_GUEST
+ def_bool !XEN_PRIVILEGED_GUEST
++ select PM
++ select PM_SLEEP
++ select PM_SLEEP_SMP if SMP
+
+ config XEN_PRIVCMD
+ def_bool y
--- /dev/null
+Subject: Fix xen build.
+From: jbeulich@novell.com
+Patch-mainline: obsolete
+
+---
+ drivers/acpi/hardware/hwsleep.c | 2 ++
+ drivers/ide/ide-lib.c | 11 +++++++++++
+ drivers/oprofile/buffer_sync.c | 35 ++++++++++++++++++++++++-----------
+ drivers/oprofile/cpu_buffer.c | 6 ++++++
+ drivers/oprofile/oprof.c | 2 ++
+ drivers/oprofile/oprofile_files.c | 6 ++++++
+ include/linux/mm.h | 2 ++
+ include/linux/oprofile.h | 6 ++++--
+ mm/memory.c | 2 ++
+ 9 files changed, 59 insertions(+), 13 deletions(-)
+
+--- a/drivers/acpi/hardware/hwsleep.c
++++ b/drivers/acpi/hardware/hwsleep.c
+@@ -430,6 +430,7 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_stat
+ * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
++#ifndef CONFIG_XEN
+ acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
+ {
+ u32 in_value;
+@@ -479,6 +480,7 @@ acpi_status asmlinkage acpi_enter_sleep_
+ }
+
+ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
++#endif
+
+ /*******************************************************************************
+ *
+--- a/drivers/ide/ide-lib.c
++++ b/drivers/ide/ide-lib.c
+@@ -177,6 +177,16 @@ void ide_toggle_bounce(ide_drive_t *driv
+ {
+ u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
+
++#ifndef CONFIG_XEN
++ if (!PCI_DMA_BUS_IS_PHYS) {
++ addr = BLK_BOUNCE_ANY;
++ } else if (on && drive->media == ide_disk) {
++ struct device *dev = drive->hwif->dev;
++
++ if (dev && dev->dma_mask)
++ addr = *dev->dma_mask;
++ }
++#else
+ if (on && drive->media == ide_disk) {
+ struct device *dev = drive->hwif->dev;
+
+@@ -185,6 +195,7 @@ void ide_toggle_bounce(ide_drive_t *driv
+ else if (dev && dev->dma_mask)
+ addr = *dev->dma_mask;
+ }
++#endif
+
+ if (drive->queue)
+ blk_queue_bounce_limit(drive->queue, addr);
+--- a/drivers/oprofile/buffer_sync.c
++++ b/drivers/oprofile/buffer_sync.c
+@@ -44,7 +44,9 @@ static cpumask_t marked_cpus = CPU_MASK_
+ static DEFINE_SPINLOCK(task_mortuary);
+ static void process_task_mortuary(void);
+
++#ifdef CONFIG_XEN
+ static int cpu_current_domain[NR_CPUS];
++#endif
+
+ /* Take ownership of the task struct and place it on the
+ * list for processing. Only after two full buffer syncs
+@@ -153,11 +155,13 @@ static void end_sync(void)
+ int sync_start(void)
+ {
+ int err;
++#ifdef CONFIG_XEN
+ int i;
+
+ for (i = 0; i < NR_CPUS; i++) {
+ cpu_current_domain[i] = COORDINATOR_DOMAIN;
+ }
++#endif
+
+ start_cpu_work();
+
+@@ -302,12 +306,14 @@ static void add_cpu_mode_switch(unsigned
+ }
+ }
+
++#ifdef CONFIG_XEN
+ static void add_domain_switch(unsigned long domain_id)
+ {
+ add_event_entry(ESCAPE_CODE);
+ add_event_entry(DOMAIN_SWITCH_CODE);
+ add_event_entry(domain_id);
+ }
++#endif
+
+ static void
+ add_user_ctx_switch(struct task_struct const * task, unsigned long cookie)
+@@ -531,11 +537,14 @@ void sync_buffer(int cpu)
+
+ add_cpu_switch(cpu);
+
++#ifdef CONFIG_XEN
+ /* We need to assign the first samples in this CPU buffer to the
+ same domain that we were processing at the last sync_buffer */
+ if (cpu_current_domain[cpu] != COORDINATOR_DOMAIN) {
+ add_domain_switch(cpu_current_domain[cpu]);
+ }
++#endif
++
+ /* Remember, only we can modify tail_pos */
+
+ available = get_slots(cpu_buf);
+@@ -553,8 +562,10 @@ void sync_buffer(int cpu)
+ } else if (s->event == CPU_TRACE_BEGIN) {
+ state = sb_bt_start;
+ add_trace_begin();
++#ifdef CONFIG_XEN
+ } else if (s->event == CPU_DOMAIN_SWITCH) {
+- domain_switch = 1;
++ domain_switch = 1;
++#endif
+ } else {
+ struct mm_struct * oldmm = mm;
+
+@@ -568,21 +579,21 @@ void sync_buffer(int cpu)
+ add_user_ctx_switch(new, cookie);
+ }
+ } else {
++#ifdef CONFIG_XEN
+ if (domain_switch) {
+ cpu_current_domain[cpu] = s->eip;
+ add_domain_switch(s->eip);
+ domain_switch = 0;
+- } else {
+- if (cpu_current_domain[cpu] !=
++ } else if (cpu_current_domain[cpu] !=
+ COORDINATOR_DOMAIN) {
+- add_sample_entry(s->eip, s->event);
+- }
+- else if (state >= sb_bt_start &&
+- !add_sample(mm, s, cpu_mode)) {
+- if (state == sb_bt_start) {
+- state = sb_bt_ignore;
+- atomic_inc(&oprofile_stats.bt_lost_no_mapping);
+- }
++ add_sample_entry(s->eip, s->event);
++ } else
++#endif
++ if (state >= sb_bt_start &&
++ !add_sample(mm, s, cpu_mode)) {
++ if (state == sb_bt_start) {
++ state = sb_bt_ignore;
++ atomic_inc(&oprofile_stats.bt_lost_no_mapping);
+ }
+ }
+ }
+@@ -591,10 +602,12 @@ void sync_buffer(int cpu)
+ }
+ release_mm(mm);
+
++#ifdef CONFIG_XEN
+ /* We reset domain to COORDINATOR at each CPU switch */
+ if (cpu_current_domain[cpu] != COORDINATOR_DOMAIN) {
+ add_domain_switch(COORDINATOR_DOMAIN);
+ }
++#endif
+
+ mark_done(cpu);
+
+--- a/drivers/oprofile/cpu_buffer.c
++++ b/drivers/oprofile/cpu_buffer.c
+@@ -38,7 +38,11 @@ static void wq_sync_buffer(struct work_s
+ #define DEFAULT_TIMER_EXPIRE (HZ / 10)
+ static int work_enabled;
+
++#ifndef CONFIG_XEN
++#define current_domain COORDINATOR_DOMAIN
++#else
+ static int32_t current_domain = COORDINATOR_DOMAIN;
++#endif
+
+ void free_cpu_buffers(void)
+ {
+@@ -303,6 +307,7 @@ void oprofile_add_trace(unsigned long pc
+ add_sample(cpu_buf, pc, 0);
+ }
+
++#ifdef CONFIG_XEN
+ int oprofile_add_domain_switch(int32_t domain_id)
+ {
+ struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[smp_processor_id()];
+@@ -321,6 +326,7 @@ int oprofile_add_domain_switch(int32_t d
+
+ return 1;
+ }
++#endif
+
+ /*
+ * This serves to avoid cpu buffer overflow, and makes sure
+--- a/drivers/oprofile/oprof.c
++++ b/drivers/oprofile/oprof.c
+@@ -37,6 +37,7 @@ static DEFINE_MUTEX(start_mutex);
+ */
+ static int timer = 0;
+
++#ifdef CONFIG_XEN
+ int oprofile_set_active(int active_domains[], unsigned int adomains)
+ {
+ int err;
+@@ -62,6 +63,7 @@ int oprofile_set_passive(int passive_dom
+ mutex_unlock(&start_mutex);
+ return err;
+ }
++#endif
+
+ int oprofile_setup(void)
+ {
+--- a/drivers/oprofile/oprofile_files.c
++++ b/drivers/oprofile/oprofile_files.c
+@@ -124,6 +124,8 @@ static const struct file_operations dump
+ .write = dump_write,
+ };
+
++#ifdef CONFIG_XEN
++
+ #define TMPBUFSIZE 512
+
+ static unsigned int adomains = 0;
+@@ -313,12 +315,16 @@ static struct file_operations passive_do
+ .write = pdomain_write,
+ };
+
++#endif /* CONFIG_XEN */
++
+ void oprofile_create_files(struct super_block * sb, struct dentry * root)
+ {
+ oprofilefs_create_file(sb, root, "enable", &enable_fops);
+ oprofilefs_create_file_perm(sb, root, "dump", &dump_fops, 0666);
++#ifdef CONFIG_XEN
+ oprofilefs_create_file(sb, root, "active_domains", &active_domain_ops);
+ oprofilefs_create_file(sb, root, "passive_domains", &passive_domain_ops);
++#endif
+ oprofilefs_create_file(sb, root, "buffer", &event_buffer_fops);
+ oprofilefs_create_ulong(sb, root, "buffer_size", &fs_buffer_size);
+ oprofilefs_create_ulong(sb, root, "buffer_watershed", &fs_buffer_watershed);
+--- a/include/linux/mm.h
++++ b/include/linux/mm.h
+@@ -187,10 +187,12 @@ struct vm_operations_struct {
+ int (*access)(struct vm_area_struct *vma, unsigned long addr,
+ void *buf, int len, int write);
+
++#ifdef CONFIG_XEN
+ /* Area-specific function for clearing the PTE at @ptep. Returns the
+ * original value of @ptep. */
+ pte_t (*zap_pte)(struct vm_area_struct *vma,
+ unsigned long addr, pte_t *ptep, int is_fullmm);
++#endif
+ #ifdef CONFIG_NUMA
+ /*
+ * set_policy() op must add a reference to any non-NULL @new mempolicy
+--- a/include/linux/oprofile.h
++++ b/include/linux/oprofile.h
+@@ -16,8 +16,9 @@
+ #include <linux/types.h>
+ #include <linux/spinlock.h>
+ #include <asm/atomic.h>
+-
++#ifdef CONFIG_XEN
+ #include <xen/interface/xenoprof.h>
++#endif
+
+ /* Each escaped entry is prefixed by ESCAPE_CODE
+ * then one of the following codes, then the
+@@ -50,11 +51,12 @@ struct oprofile_operations {
+ /* create any necessary configuration files in the oprofile fs.
+ * Optional. */
+ int (*create_files)(struct super_block * sb, struct dentry * root);
++#ifdef CONFIG_XEN
+ /* setup active domains with Xen */
+ int (*set_active)(int *active_domains, unsigned int adomains);
+ /* setup passive domains with Xen */
+ int (*set_passive)(int *passive_domains, unsigned int pdomains);
+-
++#endif
+ /* Do any necessary interrupt setup. Optional. */
+ int (*setup)(void);
+ /* Do any necessary interrupt shutdown. Optional. */
+--- a/mm/memory.c
++++ b/mm/memory.c
+@@ -758,10 +758,12 @@ static unsigned long zap_pte_range(struc
+ page->index > details->last_index))
+ continue;
+ }
++#ifdef CONFIG_XEN
+ if (unlikely(vma->vm_ops && vma->vm_ops->zap_pte))
+ ptent = vma->vm_ops->zap_pte(vma, addr, pte,
+ tlb->fullmm);
+ else
++#endif
+ ptent = ptep_get_and_clear_full(mm, addr, pte,
+ tlb->fullmm);
+ tlb_remove_tlb_entry(tlb, pte, addr);
--- /dev/null
+Subject: xen3 x86 build fixes.
+From: jbeulich@novell.com
+Patch-mainline: obsolete
+
+Index: head-2008-11-25/arch/x86/kernel/crash.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/crash.c 2008-11-25 14:34:12.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/crash.c 2008-11-25 12:41:33.000000000 +0100
+@@ -29,10 +29,10 @@
+
+ #include <mach_ipi.h>
+
++#ifndef CONFIG_XEN
+ /* This keeps a track of which one is crashing cpu. */
+ static int crashing_cpu;
+
+-#ifndef CONFIG_XEN
+ #if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
+ static atomic_t waiting_for_crash_ipi;
+
+@@ -206,9 +206,9 @@ void native_machine_crash_shutdown(struc
+ /* The kernel is broken so disable interrupts */
+ local_irq_disable();
+
++#ifndef CONFIG_XEN
+ /* Make a note of crashing cpu. Will be used in NMI callback.*/
+ crashing_cpu = safe_smp_processor_id();
+-#ifndef CONFIG_XEN
+ nmi_shootdown_cpus();
+ lapic_shutdown();
+ #if defined(CONFIG_X86_IO_APIC)
+Index: head-2008-11-25/arch/x86/power/Makefile
+===================================================================
+--- head-2008-11-25.orig/arch/x86/power/Makefile 2008-11-25 14:34:12.000000000 +0100
++++ head-2008-11-25/arch/x86/power/Makefile 2008-11-25 12:41:33.000000000 +0100
+@@ -1,2 +1,4 @@
+ obj-$(CONFIG_PM_SLEEP) += cpu_$(BITS).o
+ obj-$(CONFIG_HIBERNATION) += hibernate_$(BITS).o hibernate_asm_$(BITS).o
++
++disabled-obj-$(CONFIG_XEN) := cpu_$(BITS).o
+Index: head-2008-11-25/arch/x86/power/cpu_64.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/power/cpu_64.c 2008-11-25 14:34:12.000000000 +0100
++++ head-2008-11-25/arch/x86/power/cpu_64.c 2008-11-25 12:41:33.000000000 +0100
+@@ -135,7 +135,6 @@ void restore_processor_state(void)
+
+ static void fix_processor_context(void)
+ {
+-#ifndef CONFIG_X86_NO_TSS
+ int cpu = smp_processor_id();
+ struct tss_struct *t = &per_cpu(init_tss, cpu);
+
+@@ -147,7 +146,6 @@ static void fix_processor_context(void)
+ set_tss_desc(cpu, t);
+
+ get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
+-#endif
+
+ syscall_init(); /* This sets MSR_*STAR and related */
+ load_TR_desc(); /* This does ltr */
--- /dev/null
+Subject: Fix Xen build wrt. SFC files coming from Solarflare.
+From: jbeulich@novell.com
+Patch-mainline: obsolete
+
+Index: head-2008-04-15/drivers/xen/sfc_netback/accel_solarflare.c
+===================================================================
+--- head-2008-04-15.orig/drivers/xen/sfc_netback/accel_solarflare.c 2008-04-18 18:23:11.000000000 +0200
++++ head-2008-04-15/drivers/xen/sfc_netback/accel_solarflare.c 2008-04-18 18:24:46.000000000 +0200
+@@ -173,7 +173,7 @@ static int efx_device_to_efab_nic_index(
+ int i;
+
+ for (i = 0; i < EFHW_MAX_NR_DEVS; i++) {
+- struct efhw_nic *nic = efrm_nic_table.nic[i];
++ struct efhw_nic *nic = efrm_nic_tablep->nic[i];
+
+ /*
+ * It's possible for the nic structure to have not
+Index: head-2008-04-15/drivers/xen/sfc_netback/ci/efrm/nic_table.h
+===================================================================
+--- head-2008-04-15.orig/drivers/xen/sfc_netback/ci/efrm/nic_table.h 2008-02-20 09:32:49.000000000 +0100
++++ head-2008-04-15/drivers/xen/sfc_netback/ci/efrm/nic_table.h 2008-04-18 18:25:47.000000000 +0200
+@@ -62,21 +62,21 @@ struct efrm_nic_table {
+ };
+
+ /* Resource driver structures used by other drivers as well */
+-extern struct efrm_nic_table efrm_nic_table;
++extern struct efrm_nic_table *efrm_nic_tablep;
+
+ static inline void efrm_nic_table_hold(void)
+ {
+- atomic_inc(&efrm_nic_table.ref_count);
++ atomic_inc(&efrm_nic_tablep->ref_count);
+ }
+
+ static inline void efrm_nic_table_rele(void)
+ {
+- atomic_dec(&efrm_nic_table.ref_count);
++ atomic_dec(&efrm_nic_tablep->ref_count);
+ }
+
+ static inline int efrm_nic_table_held(void)
+ {
+- return (atomic_read(&efrm_nic_table.ref_count) != 0);
++ return (atomic_read(&efrm_nic_tablep->ref_count) != 0);
+ }
+
+ /* Run code block _x multiple times with variable nic set to each
+@@ -86,13 +86,13 @@ static inline int efrm_nic_table_held(vo
+ for ((_nic_i) = (efrm_nic_table_hold(), 0); \
+ (_nic_i) < EFHW_MAX_NR_DEVS || (efrm_nic_table_rele(), 0); \
+ (_nic_i)++) \
+- if (((_nic) = efrm_nic_table.nic[_nic_i]))
++ if (((_nic) = efrm_nic_tablep->nic[_nic_i]))
+
+ #define EFRM_FOR_EACH_NIC_IN_SET(_set, _i, _nic) \
+ for ((_i) = (efrm_nic_table_hold(), 0); \
+ (_i) < EFHW_MAX_NR_DEVS || (efrm_nic_table_rele(), 0); \
+ ++(_i)) \
+- if (((_nic) = efrm_nic_table.nic[_i]) && \
++ if (((_nic) = efrm_nic_tablep->nic[_i]) && \
+ efrm_nic_set_read((_set), (_i)))
+
+ #endif /* __CI_EFRM_NIC_TABLE_H__ */
--- /dev/null
+From: www.kernel.org
+Subject: Linux 2.6.18
+Patch-mainline: 2.6.18
+
+Automatically created from "patches.kernel.org/patch-2.6.18" by xen-port-patches.py
+
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-12-01/arch/x86/Kconfig
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Kconfig 2008-12-01 11:28:20.000000000 +0100
++++ head-2008-12-01/arch/x86/Kconfig 2008-12-01 11:28:55.000000000 +0100
+@@ -44,7 +44,6 @@ config GENERIC_LOCKBREAK
+
+ config GENERIC_TIME
+ def_bool y
+- depends on !X86_XEN
+
+ config GENERIC_CMOS_UPDATE
+ def_bool y
+Index: head-2008-12-01/arch/x86/kernel/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/Makefile 2008-12-01 11:14:33.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/Makefile 2008-12-01 11:28:55.000000000 +0100
+@@ -124,5 +124,5 @@ ifeq ($(CONFIG_X86_64),y)
+ pci-dma_64-$(CONFIG_XEN) += pci-dma_32.o
+ endif
+
+-disabled-obj-$(CONFIG_XEN) := i8259_$(BITS).o reboot.o smpboot_$(BITS).o
++disabled-obj-$(CONFIG_XEN) := i8253.o i8259_$(BITS).o reboot.o smpboot_$(BITS).o tsc_$(BITS).o
+ %/head_$(BITS).o %/head_$(BITS).s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
+Index: head-2008-12-01/arch/x86/kernel/entry_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_32-xen.S 2007-12-10 08:47:31.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:28:55.000000000 +0100
+@@ -388,8 +388,10 @@ ENTRY(sysenter_entry_pv)
+ movl %ebp,12(%esp)
+ movl $__USER_CS,4(%esp)
+ addl $4,%esp
++ CFI_ADJUST_CFA_OFFSET -4
+ /* +5*4 is SS:ESP,EFLAGS,CS:EIP. +8 is esp0 setting. */
+ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp)
++ CFI_ADJUST_CFA_OFFSET 4
+ /*
+ * Load the potential sixth argument from user stack.
+ * Careful about security.
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-09-01 12:07:31.000000000 +0200
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 11:28:55.000000000 +0100
+@@ -76,8 +76,13 @@
+
+ #if defined (__i386__)
+ #include <asm/i8259.h>
++#include <asm/i8253.h>
++DEFINE_SPINLOCK(i8253_lock);
++EXPORT_SYMBOL(i8253_lock);
+ #endif
+
++#define XEN_SHIFT 22
++
+ int pit_latch_buggy; /* extern */
+
+ #if defined(__x86_64__)
+@@ -97,10 +102,6 @@ extern unsigned long wall_jiffies;
+ DEFINE_SPINLOCK(rtc_lock);
+ EXPORT_SYMBOL(rtc_lock);
+
+-extern struct init_timer_opts timer_tsc_init;
+-extern struct timer_opts timer_tsc;
+-#define timer_none timer_tsc
+-
+ /* These are peridically updated in shared_info, and then copied here. */
+ struct shadow_time_info {
+ u64 tsc_timestamp; /* TSC at last update of time vals. */
+@@ -229,14 +230,6 @@ static inline u64 scale_delta(u64 delta,
+ return product;
+ }
+
+-#if 0 /* defined (__i386__) */
+-int read_current_timer(unsigned long *timer_val)
+-{
+- rdtscl(*timer_val);
+- return 0;
+-}
+-#endif
+-
+ void init_cpu_khz(void)
+ {
+ u64 __cpu_khz = 1000000ULL << 32;
+@@ -256,6 +249,7 @@ static u64 get_nsec_offset(struct shadow
+ return scale_delta(delta, shadow->tsc_to_nsec_mul, shadow->tsc_shift);
+ }
+
++#ifdef CONFIG_X86_64
+ static unsigned long get_usec_offset(struct shadow_time_info *shadow)
+ {
+ u64 now, delta;
+@@ -263,6 +257,7 @@ static unsigned long get_usec_offset(str
+ delta = now - shadow->tsc_timestamp;
+ return scale_delta(delta, shadow->tsc_to_usec_mul, shadow->tsc_shift);
+ }
++#endif
+
+ static void __update_wallclock(time_t sec, long nsec)
+ {
+@@ -379,6 +374,8 @@ void rtc_cmos_write(unsigned char val, u
+ }
+ EXPORT_SYMBOL(rtc_cmos_write);
+
++#ifdef CONFIG_X86_64
++
+ /*
+ * This version of gettimeofday has microsecond resolution
+ * and better than microsecond precision on fast x86 machines with TSC.
+@@ -513,6 +510,8 @@ int do_settimeofday(struct timespec *tv)
+
+ EXPORT_SYMBOL(do_settimeofday);
+
++#endif
++
+ static void sync_xen_wallclock(unsigned long dummy);
+ static DEFINE_TIMER(sync_xen_wallclock_timer, sync_xen_wallclock, 0, 0);
+ static void sync_xen_wallclock(unsigned long dummy)
+@@ -564,11 +563,15 @@ static int set_rtc_mmss(unsigned long no
+ return retval;
+ }
+
++#ifdef CONFIG_X86_64
+ /* monotonic_clock(): returns # of nanoseconds passed since time_init()
+ * Note: This function is required to return accurate
+ * time even in the absence of multiple timer ticks.
+ */
+ unsigned long long monotonic_clock(void)
++#else
++unsigned long long sched_clock(void)
++#endif
+ {
+ unsigned int cpu = get_cpu();
+ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
+@@ -588,9 +591,9 @@ unsigned long long monotonic_clock(void)
+
+ return time;
+ }
++#ifdef CONFIG_X86_64
+ EXPORT_SYMBOL(monotonic_clock);
+
+-#ifdef __x86_64__
+ unsigned long long sched_clock(void)
+ {
+ return monotonic_clock();
+@@ -760,6 +763,89 @@ irqreturn_t timer_interrupt(int irq, voi
+ return IRQ_HANDLED;
+ }
+
++#ifndef CONFIG_X86_64
++
++void tsc_init(void)
++{
++ init_cpu_khz();
++ printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
++ cpu_khz / 1000, cpu_khz % 1000);
++
++ use_tsc_delay();
++}
++
++#include <linux/clocksource.h>
++
++void mark_tsc_unstable(void)
++{
++#ifndef CONFIG_XEN /* XXX Should tell the hypervisor about this fact. */
++ tsc_unstable = 1;
++#endif
++}
++EXPORT_SYMBOL_GPL(mark_tsc_unstable);
++
++static cycle_t xen_clocksource_read(void)
++{
++#ifdef CONFIG_SMP
++ static cycle_t last_ret;
++#ifndef CONFIG_64BIT
++ cycle_t last = cmpxchg64(&last_ret, 0, 0);
++#else
++ cycle_t last = last_ret;
++#define cmpxchg64 cmpxchg
++#endif
++ cycle_t ret = sched_clock();
++
++ if (unlikely((s64)(ret - last) < 0)) {
++ if (last - ret > permitted_clock_jitter
++ && printk_ratelimit()) {
++ unsigned int cpu = get_cpu();
++ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
++
++ printk(KERN_WARNING "clocksource/%u: "
++ "Time went backwards: "
++ "ret=%Lx delta=%Ld shadow=%Lx offset=%Lx\n",
++ cpu, ret, ret - last, shadow->system_timestamp,
++ get_nsec_offset(shadow));
++ put_cpu();
++ }
++ return last;
++ }
++
++ for (;;) {
++ cycle_t cur = cmpxchg64(&last_ret, last, ret);
++
++ if (cur == last || (s64)(ret - cur) < 0)
++ return ret;
++ last = cur;
++ }
++#else
++ return sched_clock();
++#endif
++}
++
++static struct clocksource clocksource_xen = {
++ .name = "xen",
++ .rating = 400,
++ .read = xen_clocksource_read,
++ .mask = CLOCKSOURCE_MASK(64),
++ .mult = 1 << XEN_SHIFT, /* time directly in nanoseconds */
++ .shift = XEN_SHIFT,
++ .is_continuous = 1,
++};
++
++static int __init init_xen_clocksource(void)
++{
++ clocksource_xen.mult = clocksource_khz2mult(cpu_khz,
++ clocksource_xen.shift);
++
++ return clocksource_register(&clocksource_xen);
++}
++
++module_init(init_xen_clocksource);
++
++#endif
++
+ static void init_missing_ticks_accounting(unsigned int cpu)
+ {
+ struct vcpu_register_runstate_memory_area area;
+@@ -948,11 +1034,11 @@ void __init time_init(void)
+
+ update_wallclock();
+
++#ifdef CONFIG_X86_64
+ init_cpu_khz();
+ printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
+ cpu_khz / 1000, cpu_khz % 1000);
+
+-#if defined(__x86_64__)
+ vxtime.mode = VXTIME_TSC;
+ vxtime.quot = (1000000L << 32) / vxtime_hz;
+ vxtime.tsc_quot = (1000L << 32) / cpu_khz;
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-07-21 11:00:33.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:28:55.000000000 +0100
+@@ -392,7 +392,6 @@ static inline int pmd_large(pmd_t pte) {
+
+ /*
+ * Level 4 access.
+- * Never use these in the common code.
+ */
+ #define pgd_page(pgd) ((unsigned long) __va(pgd_val(pgd) & PTE_MASK))
+ #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_32.h 2008-01-28 12:24:19.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-01 11:28:55.000000000 +0100
+@@ -23,7 +23,7 @@
+ #include <xen/interface/physdev.h>
+
+ /* flag for disabling the tsc */
+-extern int tsc_disable;
++#define tsc_disable 0
+
+ struct desc_struct {
+ unsigned long a,b;
+Index: head-2008-12-01/include/asm-x86/thread_info.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/thread_info.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/thread_info.h 2008-12-01 11:28:55.000000000 +0100
+@@ -142,12 +142,16 @@ struct thread_info {
+ (_TIF_SIGPENDING|_TIF_MCE_NOTIFY|_TIF_NOTIFY_RESUME|_TIF_PERFMON_WORK)
+
+ /* flags to check in __switch_to() */
++#ifndef CONFIG_XEN
+ #define _TIF_WORK_CTXSW \
+ (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS| \
+ _TIF_NOTSC)
+
+ #define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
+ #define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
++#else
++#define _TIF_WORK_CTXSW _TIF_DEBUG
++#endif
+
+ #define PREEMPT_ACTIVE 0x10000000
+
+Index: head-2008-12-01/arch/x86/kernel/setup64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup64-xen.c 2008-01-28 12:24:19.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup64-xen.c 2008-12-01 11:28:55.000000000 +0100
+@@ -363,5 +363,7 @@ void __cpuinit cpu_init (void)
+
+ fpu_init();
+
+- raw_local_save_flags(kernel_eflags);
++ asm ("pushfq; popq %0" : "=rm" (kernel_eflags));
++ if (raw_irqs_disabled())
++ kernel_eflags &= ~X86_EFLAGS_IF;
+ }
--- /dev/null
+From: www.kernel.org
+Subject: Linux 2.6.19
+Patch-mainline: 2.6.19
+
+Automatically created from "patches.kernel.org/patch-2.6.19" by xen-port-patches.py
+
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-12-01/arch/x86/Kconfig
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Kconfig 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/Kconfig 2008-12-01 11:29:05.000000000 +0100
+@@ -411,6 +411,7 @@ config SCHED_NO_NO_OMIT_FRAME_POINTER
+
+ menuconfig PARAVIRT_GUEST
+ bool "Paravirtualized guest support"
++ depends on !X86_XEN && !X86_64_XEN
+ help
+ Say Y here to get to see options related to running Linux under
+ various hypervisors. This option alone does not add any kernel code.
+Index: head-2008-12-01/arch/x86/kernel/apic_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/apic_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/apic_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -54,7 +54,6 @@ static cpumask_t timer_bcast_ipi;
+ /*
+ * Knob to control our willingness to enable the local APIC.
+ */
+-int enable_local_apic __initdata = 0; /* -1=force-disable, +1=force-enable */
+
+ /*
+ * Debug level
+@@ -102,7 +101,7 @@ int get_physical_broadcast(void)
+
+ #ifndef CONFIG_XEN
+ #ifndef CONFIG_SMP
+-static void up_apic_timer_interrupt_call(struct pt_regs *regs)
++static void up_apic_timer_interrupt_call(void)
+ {
+ int cpu = smp_processor_id();
+
+@@ -111,11 +110,11 @@ static void up_apic_timer_interrupt_call
+ */
+ per_cpu(irq_stat, cpu).apic_timer_irqs++;
+
+- smp_local_timer_interrupt(regs);
++ smp_local_timer_interrupt();
+ }
+ #endif
+
+-void smp_send_timer_broadcast_ipi(struct pt_regs *regs)
++void smp_send_timer_broadcast_ipi(void)
+ {
+ cpumask_t mask;
+
+@@ -128,7 +127,7 @@ void smp_send_timer_broadcast_ipi(struct
+ * We can directly call the apic timer interrupt handler
+ * in UP case. Minus all irq related functions
+ */
+- up_apic_timer_interrupt_call(regs);
++ up_apic_timer_interrupt_call();
+ #endif
+ }
+ }
+Index: head-2008-12-01/arch/x86/kernel/cpu/common-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/common-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -43,7 +43,7 @@ struct cpu_dev * cpu_devs[X86_VENDOR_NUM
+
+ extern int disable_pse;
+
+-static void default_init(struct cpuinfo_x86 * c)
++static void __cpuinit default_init(struct cpuinfo_x86 * c)
+ {
+ /* Not much we can do here... */
+ /* Check if at least it has cpuid */
+@@ -56,7 +56,7 @@ static void default_init(struct cpuinfo_
+ }
+ }
+
+-static struct cpu_dev default_cpu = {
++static struct cpu_dev __cpuinitdata default_cpu = {
+ .c_init = default_init,
+ .c_vendor = "Unknown",
+ };
+@@ -191,7 +191,16 @@ static void __cpuinit get_cpu_vendor(str
+
+ static int __init x86_fxsr_setup(char * s)
+ {
++ /* Tell all the other CPU's to not use it... */
+ disable_x86_fxsr = 1;
++
++ /*
++ * ... and clear the bits early in the boot_cpu_data
++ * so that the bootup process doesn't try to do this
++ * either.
++ */
++ clear_bit(X86_FEATURE_FXSR, boot_cpu_data.x86_capability);
++ clear_bit(X86_FEATURE_XMM, boot_cpu_data.x86_capability);
+ return 1;
+ }
+ __setup("nofxsr", x86_fxsr_setup);
+@@ -272,7 +281,7 @@ static void __init early_cpu_detect(void
+ }
+ }
+
+-void __cpuinit generic_identify(struct cpuinfo_x86 * c)
++static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
+ {
+ u32 tfms, xlvl;
+ int ebx;
+@@ -698,8 +707,7 @@ old_gdt:
+ */
+ atomic_inc(&init_mm.mm_count);
+ current->active_mm = &init_mm;
+- if (current->mm)
+- BUG();
++ BUG_ON(current->mm);
+ enter_lazy_tlb(&init_mm, current);
+
+ load_esp0(t, thread);
+@@ -712,7 +720,7 @@ old_gdt:
+ #endif
+
+ /* Clear %fs and %gs. */
+- asm volatile ("xorl %eax, %eax; movl %eax, %fs; movl %eax, %gs");
++ asm volatile ("movl %0, %%fs; movl %0, %%gs" : : "r" (0));
+
+ /* Clear all 6 debug registers: */
+ set_debugreg(0, 0);
+Index: head-2008-12-01/arch/x86/kernel/entry_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_32-xen.S 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:29:05.000000000 +0100
+@@ -80,8 +80,12 @@ VM_MASK = 0x00020000
+ NMI_MASK = 0x80000000
+
+ #ifndef CONFIG_XEN
+-#define DISABLE_INTERRUPTS cli
+-#define ENABLE_INTERRUPTS sti
++/* These are replaces for paravirtualization */
++#define DISABLE_INTERRUPTS cli
++#define ENABLE_INTERRUPTS sti
++#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
++#define INTERRUPT_RETURN iret
++#define GET_CR0_INTO_EAX movl %cr0, %eax
+ #else
+ /* Offsets into shared_info_t. */
+ #define evtchn_upcall_pending /* 0 */
+@@ -99,15 +103,29 @@ NMI_MASK = 0x80000000
+
+ #define __DISABLE_INTERRUPTS movb $1,evtchn_upcall_mask(%esi)
+ #define __ENABLE_INTERRUPTS movb $0,evtchn_upcall_mask(%esi)
++#define __TEST_PENDING testb $0xFF,evtchn_upcall_pending(%esi)
+ #define DISABLE_INTERRUPTS GET_VCPU_INFO ; \
+ __DISABLE_INTERRUPTS
+ #define ENABLE_INTERRUPTS GET_VCPU_INFO ; \
+ __ENABLE_INTERRUPTS
+-#define __TEST_PENDING testb $0xFF,evtchn_upcall_pending(%esi)
++#define ENABLE_INTERRUPTS_SYSEXIT __ENABLE_INTERRUPTS ; \
++sysexit_scrit: /**** START OF SYSEXIT CRITICAL REGION ****/ ; \
++ __TEST_PENDING ; \
++ jnz 14f # process more events if necessary... ; \
++ movl ESI(%esp), %esi ; \
++ sysexit ; \
++14: __DISABLE_INTERRUPTS ; \
++ TRACE_IRQS_OFF ; \
++sysexit_ecrit: /**** END OF SYSEXIT CRITICAL REGION ****/ ; \
++ push %esp ; \
++ call evtchn_do_upcall ; \
++ add $4,%esp ; \
++ jmp ret_from_intr
++#define INTERRUPT_RETURN iret
+ #endif
+
+ #ifdef CONFIG_PREEMPT
+-#define preempt_stop cli; TRACE_IRQS_OFF
++#define preempt_stop DISABLE_INTERRUPTS; TRACE_IRQS_OFF
+ #else
+ #define preempt_stop
+ #define resume_kernel restore_nocheck
+@@ -206,18 +224,21 @@ NMI_MASK = 0x80000000
+
+ #define RING0_INT_FRAME \
+ CFI_STARTPROC simple;\
++ CFI_SIGNAL_FRAME;\
+ CFI_DEF_CFA esp, 3*4;\
+ /*CFI_OFFSET cs, -2*4;*/\
+ CFI_OFFSET eip, -3*4
+
+ #define RING0_EC_FRAME \
+ CFI_STARTPROC simple;\
++ CFI_SIGNAL_FRAME;\
+ CFI_DEF_CFA esp, 4*4;\
+ /*CFI_OFFSET cs, -2*4;*/\
+ CFI_OFFSET eip, -3*4
+
+ #define RING0_PTREGS_FRAME \
+ CFI_STARTPROC simple;\
++ CFI_SIGNAL_FRAME;\
+ CFI_DEF_CFA esp, OLDESP-EBX;\
+ /*CFI_OFFSET cs, CS-OLDESP;*/\
+ CFI_OFFSET eip, EIP-OLDESP;\
+@@ -263,8 +284,9 @@ ret_from_intr:
+ check_userspace:
+ movl EFLAGS(%esp), %eax # mix EFLAGS and CS
+ movb CS(%esp), %al
+- testl $(VM_MASK | 2), %eax
+- jz resume_kernel
++ andl $(VM_MASK | SEGMENT_RPL_MASK), %eax
++ cmpl $USER_RPL, %eax
++ jb resume_kernel # not returning to v8086 or userspace
+ ENTRY(resume_userspace)
+ DISABLE_INTERRUPTS # make sure we don't miss an interrupt
+ # setting need_resched or sigpending
+@@ -277,7 +299,7 @@ ENTRY(resume_userspace)
+
+ #ifdef CONFIG_PREEMPT
+ ENTRY(resume_kernel)
+- cli
++ DISABLE_INTERRUPTS
+ cmpl $0,TI_preempt_count(%ebp) # non-zero preempt_count ?
+ jnz restore_nocheck
+ need_resched:
+@@ -297,6 +319,7 @@ need_resched:
+ # sysenter call handler stub
+ ENTRY(sysenter_entry)
+ CFI_STARTPROC simple
++ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA esp, 0
+ CFI_REGISTER esp, ebp
+ movl SYSENTER_stack_esp0(%esp),%esp
+@@ -305,7 +328,7 @@ sysenter_past_esp:
+ * No need to follow this irqs on/off section: the syscall
+ * disabled irqs and here we enable it straight after entry:
+ */
+- sti
++ ENABLE_INTERRUPTS
+ pushl $(__USER_DS)
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET ss, 0*/
+@@ -359,26 +382,8 @@ sysenter_past_esp:
+ movl EIP(%esp), %edx
+ movl OLDESP(%esp), %ecx
+ xorl %ebp,%ebp
+-#ifdef CONFIG_XEN
+ TRACE_IRQS_ON
+- __ENABLE_INTERRUPTS
+-sysexit_scrit: /**** START OF SYSEXIT CRITICAL REGION ****/
+- __TEST_PENDING
+- jnz 14f # process more events if necessary...
+- movl ESI(%esp), %esi
+- sysexit
+-14: __DISABLE_INTERRUPTS
+- TRACE_IRQS_OFF
+-sysexit_ecrit: /**** END OF SYSEXIT CRITICAL REGION ****/
+- push %esp
+- call evtchn_do_upcall
+- add $4,%esp
+- jmp ret_from_intr
+-#else
+- TRACE_IRQS_ON
+- sti
+- sysexit
+-#endif /* !CONFIG_XEN */
++ ENABLE_INTERRUPTS_SYSEXIT
+ CFI_ENDPROC
+
+ # pv sysenter call handler stub
+@@ -444,8 +449,8 @@ restore_all:
+ # See comments in process.c:copy_thread() for details.
+ movb OLDSS(%esp), %ah
+ movb CS(%esp), %al
+- andl $(VM_MASK | (4 << 8) | 3), %eax
+- cmpl $((4 << 8) | 3), %eax
++ andl $(VM_MASK | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax
++ cmpl $((SEGMENT_LDT << 8) | USER_RPL), %eax
+ CFI_REMEMBER_STATE
+ je ldt_ss # returning to user-space with LDT SS
+ restore_nocheck:
+@@ -467,12 +472,11 @@ restore_nocheck_notrace:
+ RESTORE_REGS
+ addl $4, %esp
+ CFI_ADJUST_CFA_OFFSET -4
+-1: iret
++1: INTERRUPT_RETURN
+ .section .fixup,"ax"
+ iret_exc:
+ #ifndef CONFIG_XEN
+- TRACE_IRQS_ON
+- sti
++ ENABLE_INTERRUPTS
+ #endif
+ pushl $0 # no error code
+ pushl $do_iret_error
+@@ -498,7 +502,7 @@ ldt_ss:
+ * dosemu and wine happy. */
+ subl $8, %esp # reserve space for switch16 pointer
+ CFI_ADJUST_CFA_OFFSET 8
+- cli
++ DISABLE_INTERRUPTS
+ TRACE_IRQS_OFF
+ movl %esp, %eax
+ /* Set up the 16bit stack frame with switch32 pointer on top,
+@@ -508,7 +512,7 @@ ldt_ss:
+ TRACE_IRQS_IRET
+ RESTORE_REGS
+ lss 20+4(%esp), %esp # switch to 16bit stack
+-1: iret
++1: INTERRUPT_RETURN
+ .section __ex_table,"a"
+ .align 4
+ .long 1b,iret_exc
+@@ -524,7 +528,7 @@ scrit: /**** START OF CRITICAL REGION **
+ RESTORE_REGS
+ addl $4, %esp
+ CFI_ADJUST_CFA_OFFSET -4
+-1: iret
++1: INTERRUPT_RETURN
+ .section __ex_table,"a"
+ .align 4
+ .long 1b,iret_exc
+@@ -713,11 +717,9 @@ ENTRY(name) \
+ #define UNWIND_ESPFIX_STACK
+ #endif
+
+-ENTRY(divide_error)
+- RING0_INT_FRAME
+- pushl $0 # no error code
+- CFI_ADJUST_CFA_OFFSET 4
+- pushl $do_divide_error
++KPROBE_ENTRY(page_fault)
++ RING0_EC_FRAME
++ pushl $do_page_fault
+ CFI_ADJUST_CFA_OFFSET 4
+ ALIGN
+ error_code:
+@@ -767,6 +769,7 @@ error_code:
+ call *%edi
+ jmp ret_from_exception
+ CFI_ENDPROC
++KPROBE_END(page_fault)
+
+ #ifdef CONFIG_XEN
+ # A note on the "critical region" in our callback handler.
+@@ -926,7 +929,7 @@ ENTRY(device_not_available)
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ #ifndef CONFIG_XEN
+- movl %cr0, %eax
++ GET_CR0_INTO_EAX
+ testl $0x4, %eax # EM (math emulation bit)
+ je device_available_emulate
+ pushl $0 # temporary storage for ORIG_EIP
+@@ -961,9 +964,15 @@ device_available_emulate:
+ jne ok; \
+ label: \
+ movl SYSENTER_stack_esp0+offset(%esp),%esp; \
++ CFI_DEF_CFA esp, 0; \
++ CFI_UNDEFINED eip; \
+ pushfl; \
++ CFI_ADJUST_CFA_OFFSET 4; \
+ pushl $__KERNEL_CS; \
+- pushl $sysenter_past_esp
++ CFI_ADJUST_CFA_OFFSET 4; \
++ pushl $sysenter_past_esp; \
++ CFI_ADJUST_CFA_OFFSET 4; \
++ CFI_REL_OFFSET eip, 0
+ #endif /* CONFIG_XEN */
+
+ KPROBE_ENTRY(debug)
+@@ -982,7 +991,8 @@ debug_stack_correct:
+ call do_debug
+ jmp ret_from_exception
+ CFI_ENDPROC
+- .previous .text
++KPROBE_END(debug)
++
+ #ifndef CONFIG_XEN
+ /*
+ * NMI is doubly nasty. It can happen _while_ we're handling
+@@ -992,7 +1002,7 @@ debug_stack_correct:
+ * check whether we got an NMI on the debug path where the debug
+ * fault happened on the sysenter path.
+ */
+-ENTRY(nmi)
++KPROBE_ENTRY(nmi)
+ RING0_INT_FRAME
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+@@ -1017,6 +1027,7 @@ ENTRY(nmi)
+ cmpl $sysenter_entry,12(%esp)
+ je nmi_debug_stack_check
+ nmi_stack_correct:
++ /* We have a RING0_INT_FRAME here */
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+@@ -1027,9 +1038,12 @@ nmi_stack_correct:
+ CFI_ENDPROC
+
+ nmi_stack_fixup:
++ RING0_INT_FRAME
+ FIX_STACK(12,nmi_stack_correct, 1)
+ jmp nmi_stack_correct
++
+ nmi_debug_stack_check:
++ /* We have a RING0_INT_FRAME here */
+ cmpw $__KERNEL_CS,16(%esp)
+ jne nmi_stack_correct
+ cmpl $debug,(%esp)
+@@ -1040,8 +1054,10 @@ nmi_debug_stack_check:
+ jmp nmi_stack_correct
+
+ nmi_16bit_stack:
+- RING0_INT_FRAME
+- /* create the pointer to lss back */
++ /* We have a RING0_INT_FRAME here.
++ *
++ * create the pointer to lss back
++ */
+ pushl %ss
+ CFI_ADJUST_CFA_OFFSET 4
+ pushl %esp
+@@ -1062,14 +1078,14 @@ nmi_16bit_stack:
+ call do_nmi
+ RESTORE_REGS
+ lss 12+4(%esp), %esp # back to 16bit stack
+-1: iret
++1: INTERRUPT_RETURN
+ CFI_ENDPROC
+ .section __ex_table,"a"
+ .align 4
+ .long 1b,iret_exc
+ .previous
+ #else
+-ENTRY(nmi)
++KPROBE_ENTRY(nmi)
+ RING0_INT_FRAME
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+@@ -1081,6 +1097,7 @@ ENTRY(nmi)
+ jmp restore_all
+ CFI_ENDPROC
+ #endif
++KPROBE_END(nmi)
+
+ KPROBE_ENTRY(int3)
+ RING0_INT_FRAME
+@@ -1092,7 +1109,7 @@ KPROBE_ENTRY(int3)
+ call do_int3
+ jmp ret_from_exception
+ CFI_ENDPROC
+- .previous .text
++KPROBE_END(int3)
+
+ ENTRY(overflow)
+ RING0_INT_FRAME
+@@ -1157,7 +1174,7 @@ KPROBE_ENTRY(general_protection)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
+- .previous .text
++KPROBE_END(general_protection)
+
+ ENTRY(alignment_check)
+ RING0_EC_FRAME
+@@ -1166,13 +1183,14 @@ ENTRY(alignment_check)
+ jmp error_code
+ CFI_ENDPROC
+
+-KPROBE_ENTRY(page_fault)
+- RING0_EC_FRAME
+- pushl $do_page_fault
++ENTRY(divide_error)
++ RING0_INT_FRAME
++ pushl $0 # no error code
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl $do_divide_error
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
+- .previous .text
+
+ #ifdef CONFIG_X86_MCE
+ ENTRY(machine_check)
+@@ -1234,6 +1252,19 @@ ENTRY(fixup_4gb_segment)
+ jmp error_code
+ CFI_ENDPROC
+
++ENTRY(kernel_thread_helper)
++ pushl $0 # fake return address for unwinder
++ CFI_STARTPROC
++ movl %edx,%eax
++ push %edx
++ CFI_ADJUST_CFA_OFFSET 4
++ call *%ebx
++ push %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ call do_exit
++ CFI_ENDPROC
++ENDPROC(kernel_thread_helper)
++
+ .section .rodata,"a"
+ #include "syscall_table.S"
+
+Index: head-2008-12-01/arch/x86/kernel/head_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head_32-xen.S 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head_32-xen.S 2008-12-01 11:29:05.000000000 +0100
+@@ -62,7 +62,7 @@ ENTRY(startup_32)
+ movl %eax,%gs
+ cld # gcc2 wants the direction flag cleared at all times
+
+- pushl %eax # fake return address
++ pushl $0 # fake return address for unwinder
+ jmp start_kernel
+
+ #define HYPERCALL_PAGE_OFFSET 0x1000
+Index: head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -31,6 +31,9 @@
+ #include <linux/acpi.h>
+ #include <linux/module.h>
+ #include <linux/sysdev.h>
++#include <linux/pci.h>
++#include <linux/msi.h>
++#include <linux/htirq.h>
+
+ #include <asm/io.h>
+ #include <asm/smp.h>
+@@ -38,13 +41,15 @@
+ #include <asm/timer.h>
+ #include <asm/i8259.h>
+ #include <asm/nmi.h>
++#include <asm/msidef.h>
++#include <asm/hypertransport.h>
+
+ #include <mach_apic.h>
++#include <mach_apicdef.h>
+
+ #include "io_ports.h"
+
+ #ifdef CONFIG_XEN
+-
+ #include <xen/interface/xen.h>
+ #include <xen/interface/physdev.h>
+ #include <xen/evtchn.h>
+@@ -56,32 +61,7 @@
+
+ unsigned long io_apic_irqs;
+
+-static inline unsigned int xen_io_apic_read(unsigned int apic, unsigned int reg)
+-{
+- struct physdev_apic apic_op;
+- int ret;
+-
+- apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
+- apic_op.reg = reg;
+- ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
+- if (ret)
+- return ret;
+- return apic_op.value;
+-}
+-
+-static inline void xen_io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
+-{
+- struct physdev_apic apic_op;
+-
+- apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
+- apic_op.reg = reg;
+- apic_op.value = value;
+- WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op));
+-}
+-
+-#define io_apic_read(a,r) xen_io_apic_read(a,r)
+-#define io_apic_write(a,r,v) xen_io_apic_write(a,r,v)
+-
++#define clear_IO_APIC() ((void)0)
+ #endif /* CONFIG_XEN */
+
+ int (*ioapic_renumber_irq)(int ioapic, int irq);
+@@ -108,7 +88,7 @@ int sis_apic_bug = -1;
+ */
+ int nr_ioapic_registers[MAX_IO_APICS];
+
+-int disable_timer_pin_1 __initdata;
++static int disable_timer_pin_1 __initdata;
+
+ /*
+ * Rough estimation of how many shared IRQs there are, can
+@@ -128,12 +108,124 @@ static struct irq_pin_list {
+ int apic, pin, next;
+ } irq_2_pin[PIN_MAP_SIZE];
+
+-int vector_irq[NR_VECTORS] __read_mostly = { [0 ... NR_VECTORS - 1] = -1};
+-#ifdef CONFIG_PCI_MSI
+-#define vector_to_irq(vector) \
+- (platform_legacy_irq(vector) ? vector : vector_irq[vector])
++#ifndef CONFIG_XEN
++struct io_apic {
++ unsigned int index;
++ unsigned int unused[3];
++ unsigned int data;
++};
++
++static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx)
++{
++ return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx)
++ + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK);
++}
++#endif
++
++static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
++{
++#ifndef CONFIG_XEN
++ struct io_apic __iomem *io_apic = io_apic_base(apic);
++ writel(reg, &io_apic->index);
++ return readl(&io_apic->data);
++#else
++ struct physdev_apic apic_op;
++ int ret;
++
++ apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.reg = reg;
++ ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
++ if (ret)
++ return ret;
++ return apic_op.value;
++#endif
++}
++
++static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
++{
++#ifndef CONFIG_XEN
++ struct io_apic __iomem *io_apic = io_apic_base(apic);
++ writel(reg, &io_apic->index);
++ writel(value, &io_apic->data);
++#else
++ struct physdev_apic apic_op;
++
++ apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.reg = reg;
++ apic_op.value = value;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op));
++#endif
++}
++
++#ifndef CONFIG_XEN
++/*
++ * Re-write a value: to be used for read-modify-write
++ * cycles where the read already set up the index register.
++ *
++ * Older SiS APIC requires we rewrite the index register
++ */
++static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
++{
++ volatile struct io_apic *io_apic = io_apic_base(apic);
++ if (sis_apic_bug)
++ writel(reg, &io_apic->index);
++ writel(value, &io_apic->data);
++}
+ #else
+-#define vector_to_irq(vector) (vector)
++#define io_apic_modify io_apic_write
++#endif
++
++union entry_union {
++ struct { u32 w1, w2; };
++ struct IO_APIC_route_entry entry;
++};
++
++#ifndef CONFIG_XEN
++static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin)
++{
++ union entry_union eu;
++ unsigned long flags;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ eu.w1 = io_apic_read(apic, 0x10 + 2 * pin);
++ eu.w2 = io_apic_read(apic, 0x11 + 2 * pin);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ return eu.entry;
++}
++#endif
++
++/*
++ * When we write a new IO APIC routing entry, we need to write the high
++ * word first! If the mask bit in the low word is clear, we will enable
++ * the interrupt, and we need to make sure the entry is fully populated
++ * before that happens.
++ */
++static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
++{
++ unsigned long flags;
++ union entry_union eu;
++ eu.entry = e;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11 + 2*pin, eu.w2);
++ io_apic_write(apic, 0x10 + 2*pin, eu.w1);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++#ifndef CONFIG_XEN
++/*
++ * When we mask an IO APIC routing entry, we need to write the low
++ * word first, in order to set the mask bit before we change the
++ * high bits!
++ */
++static void ioapic_mask_entry(int apic, int pin)
++{
++ unsigned long flags;
++ union entry_union eu = { .entry.mask = 1 };
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x10 + 2*pin, eu.w1);
++ io_apic_write(apic, 0x11 + 2*pin, eu.w2);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
+ #endif
+
+ /*
+@@ -159,9 +251,7 @@ static void add_pin_to_irq(unsigned int
+ entry->pin = pin;
+ }
+
+-#ifdef CONFIG_XEN
+-#define clear_IO_APIC() ((void)0)
+-#else
++#ifndef CONFIG_XEN
+ /*
+ * Reroute an IRQ to a different pin.
+ */
+@@ -246,25 +336,16 @@ static void unmask_IO_APIC_irq (unsigned
+ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
+ {
+ struct IO_APIC_route_entry entry;
+- unsigned long flags;
+
+ /* Check delivery_mode to be sure we're not clearing an SMI pin */
+- spin_lock_irqsave(&ioapic_lock, flags);
+- *(((int*)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
+- *(((int*)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ entry = ioapic_read_entry(apic, pin);
+ if (entry.delivery_mode == dest_SMI)
+ return;
+
+ /*
+ * Disable it in the IO-APIC irq-routing table:
+ */
+- memset(&entry, 0, sizeof(entry));
+- entry.mask = 1;
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry) + 0));
+- io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry) + 1));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_mask_entry(apic, pin);
+ }
+
+ static void clear_IO_APIC (void)
+@@ -304,7 +385,7 @@ static void set_ioapic_affinity_irq(unsi
+ break;
+ entry = irq_2_pin + entry->next;
+ }
+- set_irq_info(irq, cpumask);
++ set_native_irq_info(irq, cpumask);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+
+@@ -1212,43 +1293,43 @@ static inline int IO_APIC_irq_trigger(in
+ /* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
+ u8 irq_vector[NR_IRQ_VECTORS] __read_mostly; /* = { FIRST_DEVICE_VECTOR , 0 }; */
+
+-int assign_irq_vector(int irq)
++static int __assign_irq_vector(int irq)
+ {
+- unsigned long flags;
+ int vector;
+ struct physdev_irq irq_op;
+
+- BUG_ON(irq != AUTO_ASSIGN && (unsigned)irq >= NR_IRQ_VECTORS);
++ BUG_ON((unsigned)irq >= NR_IRQ_VECTORS);
+
+ if (irq < PIRQ_BASE || irq - PIRQ_BASE > NR_PIRQS)
+ return -EINVAL;
+
+- spin_lock_irqsave(&vector_lock, flags);
+-
+- if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0) {
+- spin_unlock_irqrestore(&vector_lock, flags);
+- return IO_APIC_VECTOR(irq);
+- }
++ if (irq_vector[irq] > 0)
++ return irq_vector[irq];
+
+ irq_op.irq = irq;
+- if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op)) {
+- spin_unlock_irqrestore(&vector_lock, flags);
++ if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op))
+ return -ENOSPC;
+- }
+
+ vector = irq_op.vector;
+- vector_irq[vector] = irq;
+- if (irq != AUTO_ASSIGN)
+- IO_APIC_VECTOR(irq) = vector;
++ irq_vector[irq] = vector;
++
++ return vector;
++}
++
++static int assign_irq_vector(int irq)
++{
++ unsigned long flags;
++ int vector;
+
++ spin_lock_irqsave(&vector_lock, flags);
++ vector = __assign_irq_vector(irq);
+ spin_unlock_irqrestore(&vector_lock, flags);
+
+ return vector;
+ }
+
+ #ifndef CONFIG_XEN
+-static struct hw_interrupt_type ioapic_level_type;
+-static struct hw_interrupt_type ioapic_edge_type;
++static struct irq_chip ioapic_chip;
+
+ #define IOAPIC_AUTO -1
+ #define IOAPIC_EDGE 0
+@@ -1256,16 +1337,16 @@ static struct hw_interrupt_type ioapic_e
+
+ static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
+ {
+- unsigned idx;
+-
+- idx = use_pci_vector() && !platform_legacy_irq(irq) ? vector : irq;
+-
+ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+ trigger == IOAPIC_LEVEL)
+- irq_desc[idx].chip = &ioapic_level_type;
+- else
+- irq_desc[idx].chip = &ioapic_edge_type;
+- set_intr_gate(vector, interrupt[idx]);
++ set_irq_chip_and_handler_name(irq, &ioapic_chip,
++ handle_fasteoi_irq, "fasteoi");
++ else {
++ irq_desc[irq].status |= IRQ_DELAYED_DISABLE;
++ set_irq_chip_and_handler_name(irq, &ioapic_chip,
++ handle_edge_irq, "edge");
++ }
++ set_intr_gate(vector, interrupt[irq]);
+ }
+ #else
+ #define ioapic_register_intr(irq, vector, trigger) evtchn_register_pirq(irq)
+@@ -1336,9 +1417,8 @@ static void __init setup_IO_APIC_irqs(vo
+ if (!apic && (irq < 16))
+ disable_8259A_irq(irq);
+ }
++ ioapic_write_entry(apic, pin, entry);
+ spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1));
+- io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0));
+ set_native_irq_info(irq, TARGET_CPUS);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+@@ -1355,7 +1435,6 @@ static void __init setup_IO_APIC_irqs(vo
+ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, int vector)
+ {
+ struct IO_APIC_route_entry entry;
+- unsigned long flags;
+
+ memset(&entry,0,sizeof(entry));
+
+@@ -1380,15 +1459,13 @@ static void __init setup_ExtINT_IRQ0_pin
+ * The timer IRQ doesn't have to know that behind the
+ * scene we have a 8259A-master in AEOI mode ...
+ */
+- irq_desc[0].chip = &ioapic_edge_type;
++ irq_desc[0].chip = &ioapic_chip;
++ set_irq_handler(0, handle_edge_irq);
+
+ /*
+ * Add it to the IO-APIC irq-routing table:
+ */
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1));
+- io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(apic, pin, entry);
+
+ enable_8259A_irq(0);
+ }
+@@ -1498,10 +1575,7 @@ void __init print_IO_APIC(void)
+ for (i = 0; i <= reg_01.bits.entries; i++) {
+ struct IO_APIC_route_entry entry;
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- *(((int *)&entry)+0) = io_apic_read(apic, 0x10+i*2);
+- *(((int *)&entry)+1) = io_apic_read(apic, 0x11+i*2);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ entry = ioapic_read_entry(apic, i);
+
+ printk(KERN_DEBUG " %02x %03X %02X ",
+ i,
+@@ -1521,17 +1595,12 @@ void __init print_IO_APIC(void)
+ );
+ }
+ }
+- if (use_pci_vector())
+- printk(KERN_INFO "Using vector-based indexing\n");
+ printk(KERN_DEBUG "IRQ to pin mappings:\n");
+ for (i = 0; i < NR_IRQS; i++) {
+ struct irq_pin_list *entry = irq_2_pin + i;
+ if (entry->pin < 0)
+ continue;
+- if (use_pci_vector() && !platform_legacy_irq(i))
+- printk(KERN_DEBUG "IRQ%d ", IO_APIC_VECTOR(i));
+- else
+- printk(KERN_DEBUG "IRQ%d ", i);
++ printk(KERN_DEBUG "IRQ%d ", i);
+ for (;;) {
+ printk("-> %d:%d", entry->apic, entry->pin);
+ if (!entry->next)
+@@ -1720,10 +1789,7 @@ static void __init enable_IO_APIC(void)
+ /* See if any of the pins is in ExtINT mode */
+ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+ struct IO_APIC_route_entry entry;
+- spin_lock_irqsave(&ioapic_lock, flags);
+- *(((int *)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
+- *(((int *)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ entry = ioapic_read_entry(apic, pin);
+
+
+ /* If the interrupt line is enabled and in ExtInt mode
+@@ -1782,7 +1848,6 @@ void disable_IO_APIC(void)
+ */
+ if (ioapic_i8259.pin != -1) {
+ struct IO_APIC_route_entry entry;
+- unsigned long flags;
+
+ memset(&entry, 0, sizeof(entry));
+ entry.mask = 0; /* Enabled */
+@@ -1799,12 +1864,7 @@ void disable_IO_APIC(void)
+ /*
+ * Add it to the IO-APIC irq-routing table:
+ */
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(ioapic_i8259.apic, 0x11+2*ioapic_i8259.pin,
+- *(((int *)&entry)+1));
+- io_apic_write(ioapic_i8259.apic, 0x10+2*ioapic_i8259.pin,
+- *(((int *)&entry)+0));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(ioapic_i8259.apic, ioapic_i8259.pin, entry);
+ }
+ disconnect_bsp_APIC(ioapic_i8259.pin != -1);
+ #endif
+@@ -1971,6 +2031,8 @@ static int __init timer_irq_works(void)
+ */
+
+ /*
++ * Startup quirk:
++ *
+ * Starting up a edge-triggered IO-APIC interrupt is
+ * nasty - we need to make sure that we get the edge.
+ * If it is already asserted for some reason, we need
+@@ -1978,8 +2040,10 @@ static int __init timer_irq_works(void)
+ *
+ * This is not complete - we should be able to fake
+ * an edge even if it isn't on the 8259A...
++ *
++ * (We do this for level-triggered IRQs too - it cannot hurt.)
+ */
+-static unsigned int startup_edge_ioapic_irq(unsigned int irq)
++static unsigned int startup_ioapic_irq(unsigned int irq)
+ {
+ int was_pending = 0;
+ unsigned long flags;
+@@ -1996,47 +2060,18 @@ static unsigned int startup_edge_ioapic_
+ return was_pending;
+ }
+
+-/*
+- * Once we have recorded IRQ_PENDING already, we can mask the
+- * interrupt for real. This prevents IRQ storms from unhandled
+- * devices.
+- */
+-static void ack_edge_ioapic_irq(unsigned int irq)
+-{
+- move_irq(irq);
+- if ((irq_desc[irq].status & (IRQ_PENDING | IRQ_DISABLED))
+- == (IRQ_PENDING | IRQ_DISABLED))
+- mask_IO_APIC_irq(irq);
+- ack_APIC_irq();
+-}
+-
+-/*
+- * Level triggered interrupts can just be masked,
+- * and shutting down and starting up the interrupt
+- * is the same as enabling and disabling them -- except
+- * with a startup need to return a "was pending" value.
+- *
+- * Level triggered interrupts are special because we
+- * do not touch any IO-APIC register while handling
+- * them. We ack the APIC in the end-IRQ handler, not
+- * in the start-IRQ-handler. Protection against reentrance
+- * from the same interrupt is still provided, both by the
+- * generic IRQ layer and by the fact that an unacked local
+- * APIC does not accept IRQs.
+- */
+-static unsigned int startup_level_ioapic_irq (unsigned int irq)
++static void ack_ioapic_irq(unsigned int irq)
+ {
+- unmask_IO_APIC_irq(irq);
+-
+- return 0; /* don't check for pending */
++ move_native_irq(irq);
++ ack_APIC_irq();
+ }
+
+-static void end_level_ioapic_irq (unsigned int irq)
++static void ack_ioapic_quirk_irq(unsigned int irq)
+ {
+ unsigned long v;
+ int i;
+
+- move_irq(irq);
++ move_native_irq(irq);
+ /*
+ * It appears there is an erratum which affects at least version 0x11
+ * of I/O APIC (that's the 82093AA and cores integrated into various
+@@ -2056,7 +2091,7 @@ static void end_level_ioapic_irq (unsign
+ * operation to prevent an edge-triggered interrupt escaping meanwhile.
+ * The idea is from Manfred Spraul. --macro
+ */
+- i = IO_APIC_VECTOR(irq);
++ i = irq_vector[irq];
+
+ v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1));
+
+@@ -2071,104 +2106,24 @@ static void end_level_ioapic_irq (unsign
+ }
+ }
+
+-#ifdef CONFIG_PCI_MSI
+-static unsigned int startup_edge_ioapic_vector(unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- return startup_edge_ioapic_irq(irq);
+-}
+-
+-static void ack_edge_ioapic_vector(unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- move_native_irq(vector);
+- ack_edge_ioapic_irq(irq);
+-}
+-
+-static unsigned int startup_level_ioapic_vector (unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- return startup_level_ioapic_irq (irq);
+-}
+-
+-static void end_level_ioapic_vector (unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- move_native_irq(vector);
+- end_level_ioapic_irq(irq);
+-}
+-
+-static void mask_IO_APIC_vector (unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- mask_IO_APIC_irq(irq);
+-}
+-
+-static void unmask_IO_APIC_vector (unsigned int vector)
++static int ioapic_retrigger_irq(unsigned int irq)
+ {
+- int irq = vector_to_irq(vector);
+-
+- unmask_IO_APIC_irq(irq);
+-}
+-
+-#ifdef CONFIG_SMP
+-static void set_ioapic_affinity_vector (unsigned int vector,
+- cpumask_t cpu_mask)
+-{
+- int irq = vector_to_irq(vector);
+-
+- set_native_irq_info(vector, cpu_mask);
+- set_ioapic_affinity_irq(irq, cpu_mask);
+-}
+-#endif
+-#endif
+-
+-static int ioapic_retrigger(unsigned int irq)
+-{
+- send_IPI_self(IO_APIC_VECTOR(irq));
++ send_IPI_self(irq_vector[irq]);
+
+ return 1;
+ }
+
+-/*
+- * Level and edge triggered IO-APIC interrupts need different handling,
+- * so we use two separate IRQ descriptors. Edge triggered IRQs can be
+- * handled with the level-triggered descriptor, but that one has slightly
+- * more overhead. Level-triggered interrupts cannot be handled with the
+- * edge-triggered handler, without risking IRQ storms and other ugly
+- * races.
+- */
+-static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
+- .typename = "IO-APIC-edge",
+- .startup = startup_edge_ioapic,
+- .shutdown = shutdown_edge_ioapic,
+- .enable = enable_edge_ioapic,
+- .disable = disable_edge_ioapic,
+- .ack = ack_edge_ioapic,
+- .end = end_edge_ioapic,
+-#ifdef CONFIG_SMP
+- .set_affinity = set_ioapic_affinity,
+-#endif
+- .retrigger = ioapic_retrigger,
+-};
+-
+-static struct hw_interrupt_type ioapic_level_type __read_mostly = {
+- .typename = "IO-APIC-level",
+- .startup = startup_level_ioapic,
+- .shutdown = shutdown_level_ioapic,
+- .enable = enable_level_ioapic,
+- .disable = disable_level_ioapic,
+- .ack = mask_and_ack_level_ioapic,
+- .end = end_level_ioapic,
++static struct irq_chip ioapic_chip __read_mostly = {
++ .name = "IO-APIC",
++ .startup = startup_ioapic_irq,
++ .mask = mask_IO_APIC_irq,
++ .unmask = unmask_IO_APIC_irq,
++ .ack = ack_ioapic_irq,
++ .eoi = ack_ioapic_quirk_irq,
+ #ifdef CONFIG_SMP
+- .set_affinity = set_ioapic_affinity,
++ .set_affinity = set_ioapic_affinity_irq,
+ #endif
+- .retrigger = ioapic_retrigger,
++ .retrigger = ioapic_retrigger_irq,
+ };
+ #endif /* !CONFIG_XEN */
+
+@@ -2189,12 +2144,7 @@ static inline void init_IO_APIC_traps(vo
+ */
+ for (irq = 0; irq < NR_IRQS ; irq++) {
+ int tmp = irq;
+- if (use_pci_vector()) {
+- if (!platform_legacy_irq(tmp))
+- if ((tmp = vector_to_irq(tmp)) == -1)
+- continue;
+- }
+- if (IO_APIC_IRQ(tmp) && !IO_APIC_VECTOR(tmp)) {
++ if (IO_APIC_IRQ(tmp) && !irq_vector[tmp]) {
+ /*
+ * Hmm.. We don't have an entry for this,
+ * so default to an old-fashioned 8259
+@@ -2205,22 +2155,23 @@ static inline void init_IO_APIC_traps(vo
+ #ifndef CONFIG_XEN
+ else
+ /* Strange. Oh, well.. */
+- irq_desc[irq].chip = &no_irq_type;
++ irq_desc[irq].chip = &no_irq_chip;
+ #endif
+ }
+ }
+ }
+
+ #ifndef CONFIG_XEN
+-static void enable_lapic_irq (unsigned int irq)
+-{
+- unsigned long v;
++/*
++ * The local APIC irq-chip implementation:
++ */
+
+- v = apic_read(APIC_LVT0);
+- apic_write_around(APIC_LVT0, v & ~APIC_LVT_MASKED);
++static void ack_apic(unsigned int irq)
++{
++ ack_APIC_irq();
+ }
+
+-static void disable_lapic_irq (unsigned int irq)
++static void mask_lapic_irq (unsigned int irq)
+ {
+ unsigned long v;
+
+@@ -2228,21 +2179,19 @@ static void disable_lapic_irq (unsigned
+ apic_write_around(APIC_LVT0, v | APIC_LVT_MASKED);
+ }
+
+-static void ack_lapic_irq (unsigned int irq)
++static void unmask_lapic_irq (unsigned int irq)
+ {
+- ack_APIC_irq();
+-}
++ unsigned long v;
+
+-static void end_lapic_irq (unsigned int i) { /* nothing */ }
++ v = apic_read(APIC_LVT0);
++ apic_write_around(APIC_LVT0, v & ~APIC_LVT_MASKED);
++}
+
+-static struct hw_interrupt_type lapic_irq_type __read_mostly = {
+- .typename = "local-APIC-edge",
+- .startup = NULL, /* startup_irq() not used for IRQ0 */
+- .shutdown = NULL, /* shutdown_irq() not used for IRQ0 */
+- .enable = enable_lapic_irq,
+- .disable = disable_lapic_irq,
+- .ack = ack_lapic_irq,
+- .end = end_lapic_irq
++static struct irq_chip lapic_chip __read_mostly = {
++ .name = "local-APIC-edge",
++ .mask = mask_lapic_irq,
++ .unmask = unmask_lapic_irq,
++ .eoi = ack_apic,
+ };
+
+ static void setup_nmi (void)
+@@ -2275,17 +2224,13 @@ static inline void unlock_ExtINT_logic(v
+ int apic, pin, i;
+ struct IO_APIC_route_entry entry0, entry1;
+ unsigned char save_control, save_freq_select;
+- unsigned long flags;
+
+ pin = find_isa_irq_pin(8, mp_INT);
+ apic = find_isa_irq_apic(8, mp_INT);
+ if (pin == -1)
+ return;
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- *(((int *)&entry0) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
+- *(((int *)&entry0) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ entry0 = ioapic_read_entry(apic, pin);
+ clear_IO_APIC_pin(apic, pin);
+
+ memset(&entry1, 0, sizeof(entry1));
+@@ -2298,10 +2243,7 @@ static inline void unlock_ExtINT_logic(v
+ entry1.trigger = 0;
+ entry1.vector = 0;
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry1) + 1));
+- io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry1) + 0));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(apic, pin, entry1);
+
+ save_control = CMOS_READ(RTC_CONTROL);
+ save_freq_select = CMOS_READ(RTC_FREQ_SELECT);
+@@ -2320,10 +2262,7 @@ static inline void unlock_ExtINT_logic(v
+ CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
+ clear_IO_APIC_pin(apic, pin);
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry0) + 1));
+- io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry0) + 0));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(apic, pin, entry0);
+ }
+
+ int timer_uses_ioapic_pin_0;
+@@ -2423,7 +2362,8 @@ static inline void check_timer(void)
+ printk(KERN_INFO "...trying to set up timer as Virtual Wire IRQ...");
+
+ disable_8259A_irq(0);
+- irq_desc[0].chip = &lapic_irq_type;
++ set_irq_chip_and_handler_name(0, &lapic_chip, handle_fasteoi_irq,
++ "fasteio");
+ apic_write_around(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
+ enable_8259A_irq(0);
+
+@@ -2537,17 +2477,12 @@ static int ioapic_suspend(struct sys_dev
+ {
+ struct IO_APIC_route_entry *entry;
+ struct sysfs_ioapic_data *data;
+- unsigned long flags;
+ int i;
+
+ data = container_of(dev, struct sysfs_ioapic_data, dev);
+ entry = data->entry;
+- spin_lock_irqsave(&ioapic_lock, flags);
+- for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) {
+- *(((int *)entry) + 1) = io_apic_read(dev->id, 0x11 + 2 * i);
+- *(((int *)entry) + 0) = io_apic_read(dev->id, 0x10 + 2 * i);
+- }
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i ++)
++ entry[i] = ioapic_read_entry(dev->id, i);
+
+ return 0;
+ }
+@@ -2569,11 +2504,9 @@ static int ioapic_resume(struct sys_devi
+ reg_00.bits.ID = mp_ioapics[dev->id].mpc_apicid;
+ io_apic_write(dev->id, 0, reg_00.raw);
+ }
+- for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) {
+- io_apic_write(dev->id, 0x11+2*i, *(((int *)entry)+1));
+- io_apic_write(dev->id, 0x10+2*i, *(((int *)entry)+0));
+- }
+ spin_unlock_irqrestore(&ioapic_lock, flags);
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i ++)
++ ioapic_write_entry(dev->id, i, entry[i]);
+
+ return 0;
+ }
+@@ -2619,8 +2552,240 @@ static int __init ioapic_init_sysfs(void
+
+ device_initcall(ioapic_init_sysfs);
+
++/*
++ * Dynamic irq allocate and deallocation
++ */
++int create_irq(void)
++{
++ /* Allocate an unused irq */
++ int irq, new, vector;
++ unsigned long flags;
++
++ irq = -ENOSPC;
++ spin_lock_irqsave(&vector_lock, flags);
++ for (new = (NR_IRQS - 1); new >= 0; new--) {
++ if (platform_legacy_irq(new))
++ continue;
++ if (irq_vector[new] != 0)
++ continue;
++ vector = __assign_irq_vector(new);
++ if (likely(vector > 0))
++ irq = new;
++ break;
++ }
++ spin_unlock_irqrestore(&vector_lock, flags);
++
++ if (irq >= 0) {
++ set_intr_gate(vector, interrupt[irq]);
++ dynamic_irq_init(irq);
++ }
++ return irq;
++}
++
++void destroy_irq(unsigned int irq)
++{
++ unsigned long flags;
++
++ dynamic_irq_cleanup(irq);
++
++ spin_lock_irqsave(&vector_lock, flags);
++ irq_vector[irq] = 0;
++ spin_unlock_irqrestore(&vector_lock, flags);
++}
++
+ #endif /* CONFIG_XEN */
+
++/*
++ * MSI mesage composition
++ */
++#if defined(CONFIG_PCI_MSI) && !defined(CONFIG_XEN)
++static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
++{
++ int vector;
++ unsigned dest;
++
++ vector = assign_irq_vector(irq);
++ if (vector >= 0) {
++ dest = cpu_mask_to_apicid(TARGET_CPUS);
++
++ msg->address_hi = MSI_ADDR_BASE_HI;
++ msg->address_lo =
++ MSI_ADDR_BASE_LO |
++ ((INT_DEST_MODE == 0) ?
++ MSI_ADDR_DEST_MODE_PHYSICAL:
++ MSI_ADDR_DEST_MODE_LOGICAL) |
++ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
++ MSI_ADDR_REDIRECTION_CPU:
++ MSI_ADDR_REDIRECTION_LOWPRI) |
++ MSI_ADDR_DEST_ID(dest);
++
++ msg->data =
++ MSI_DATA_TRIGGER_EDGE |
++ MSI_DATA_LEVEL_ASSERT |
++ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
++ MSI_DATA_DELIVERY_FIXED:
++ MSI_DATA_DELIVERY_LOWPRI) |
++ MSI_DATA_VECTOR(vector);
++ }
++ return vector;
++}
++
++#ifdef CONFIG_SMP
++static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
++{
++ struct msi_msg msg;
++ unsigned int dest;
++ cpumask_t tmp;
++ int vector;
++
++ cpus_and(tmp, mask, cpu_online_map);
++ if (cpus_empty(tmp))
++ tmp = TARGET_CPUS;
++
++ vector = assign_irq_vector(irq);
++ if (vector < 0)
++ return;
++
++ dest = cpu_mask_to_apicid(mask);
++
++ read_msi_msg(irq, &msg);
++
++ msg.data &= ~MSI_DATA_VECTOR_MASK;
++ msg.data |= MSI_DATA_VECTOR(vector);
++ msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
++ msg.address_lo |= MSI_ADDR_DEST_ID(dest);
++
++ write_msi_msg(irq, &msg);
++ set_native_irq_info(irq, mask);
++}
++#endif /* CONFIG_SMP */
++
++/*
++ * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices,
++ * which implement the MSI or MSI-X Capability Structure.
++ */
++static struct irq_chip msi_chip = {
++ .name = "PCI-MSI",
++ .unmask = unmask_msi_irq,
++ .mask = mask_msi_irq,
++ .ack = ack_ioapic_irq,
++#ifdef CONFIG_SMP
++ .set_affinity = set_msi_irq_affinity,
++#endif
++ .retrigger = ioapic_retrigger_irq,
++};
++
++int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev)
++{
++ struct msi_msg msg;
++ int ret;
++ ret = msi_compose_msg(dev, irq, &msg);
++ if (ret < 0)
++ return ret;
++
++ write_msi_msg(irq, &msg);
++
++ set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq,
++ "edge");
++
++ return 0;
++}
++
++void arch_teardown_msi_irq(unsigned int irq)
++{
++ return;
++}
++
++#endif /* CONFIG_PCI_MSI */
++
++/*
++ * Hypertransport interrupt support
++ */
++#ifdef CONFIG_HT_IRQ
++
++#ifdef CONFIG_SMP
++
++static void target_ht_irq(unsigned int irq, unsigned int dest)
++{
++ struct ht_irq_msg msg;
++ fetch_ht_irq_msg(irq, &msg);
++
++ msg.address_lo &= ~(HT_IRQ_LOW_DEST_ID_MASK);
++ msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK);
++
++ msg.address_lo |= HT_IRQ_LOW_DEST_ID(dest);
++ msg.address_hi |= HT_IRQ_HIGH_DEST_ID(dest);
++
++ write_ht_irq_msg(irq, &msg);
++}
++
++static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
++{
++ unsigned int dest;
++ cpumask_t tmp;
++
++ cpus_and(tmp, mask, cpu_online_map);
++ if (cpus_empty(tmp))
++ tmp = TARGET_CPUS;
++
++ cpus_and(mask, tmp, CPU_MASK_ALL);
++
++ dest = cpu_mask_to_apicid(mask);
++
++ target_ht_irq(irq, dest);
++ set_native_irq_info(irq, mask);
++}
++#endif
++
++static struct irq_chip ht_irq_chip = {
++ .name = "PCI-HT",
++ .mask = mask_ht_irq,
++ .unmask = unmask_ht_irq,
++ .ack = ack_ioapic_irq,
++#ifdef CONFIG_SMP
++ .set_affinity = set_ht_irq_affinity,
++#endif
++ .retrigger = ioapic_retrigger_irq,
++};
++
++int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
++{
++ int vector;
++
++ vector = assign_irq_vector(irq);
++ if (vector >= 0) {
++ struct ht_irq_msg msg;
++ unsigned dest;
++ cpumask_t tmp;
++
++ cpus_clear(tmp);
++ cpu_set(vector >> 8, tmp);
++ dest = cpu_mask_to_apicid(tmp);
++
++ msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest);
++
++ msg.address_lo =
++ HT_IRQ_LOW_BASE |
++ HT_IRQ_LOW_DEST_ID(dest) |
++ HT_IRQ_LOW_VECTOR(vector) |
++ ((INT_DEST_MODE == 0) ?
++ HT_IRQ_LOW_DM_PHYSICAL :
++ HT_IRQ_LOW_DM_LOGICAL) |
++ HT_IRQ_LOW_RQEOI_EDGE |
++ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
++ HT_IRQ_LOW_MT_FIXED :
++ HT_IRQ_LOW_MT_ARBITRATED) |
++ HT_IRQ_LOW_IRQ_MASKED;
++
++ write_ht_irq_msg(irq, &msg);
++
++ set_irq_chip_and_handler_name(irq, &ht_irq_chip,
++ handle_edge_irq, "edge");
++ }
++ return vector;
++}
++#endif /* CONFIG_HT_IRQ */
++
+ /* --------------------------------------------------------------------------
+ ACPI-based IOAPIC Configuration
+ -------------------------------------------------------------------------- */
+@@ -2774,13 +2939,34 @@ int io_apic_set_pci_routing (int ioapic,
+ if (!ioapic && (irq < 16))
+ disable_8259A_irq(irq);
+
++ ioapic_write_entry(ioapic, pin, entry);
+ spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(ioapic, 0x11+2*pin, *(((int *)&entry)+1));
+- io_apic_write(ioapic, 0x10+2*pin, *(((int *)&entry)+0));
+- set_native_irq_info(use_pci_vector() ? entry.vector : irq, TARGET_CPUS);
++ set_native_irq_info(irq, TARGET_CPUS);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ return 0;
+ }
+
+ #endif /* CONFIG_ACPI */
++
++static int __init parse_disable_timer_pin_1(char *arg)
++{
++ disable_timer_pin_1 = 1;
++ return 0;
++}
++early_param("disable_timer_pin_1", parse_disable_timer_pin_1);
++
++static int __init parse_enable_timer_pin_1(char *arg)
++{
++ disable_timer_pin_1 = -1;
++ return 0;
++}
++early_param("enable_timer_pin_1", parse_enable_timer_pin_1);
++
++static int __init parse_noapic(char *arg)
++{
++ /* disable IO-APIC */
++ disable_ioapic_setup();
++ return 0;
++}
++early_param("noapic", parse_noapic);
+Index: head-2008-12-01/arch/x86/kernel/irq_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -53,8 +53,10 @@ static union irq_ctx *softirq_ctx[NR_CPU
+ */
+ fastcall unsigned int do_IRQ(struct pt_regs *regs)
+ {
++ struct pt_regs *old_regs;
+ /* high bit used in ret_from_ code */
+ int irq = ~regs->orig_eax;
++ struct irq_desc *desc = irq_desc + irq;
+ #ifdef CONFIG_4KSTACKS
+ union irq_ctx *curctx, *irqctx;
+ u32 *isp;
+@@ -66,6 +68,7 @@ fastcall unsigned int do_IRQ(struct pt_r
+ BUG();
+ }
+
++ old_regs = set_irq_regs(regs);
+ /*irq_enter();*/
+ #ifdef CONFIG_DEBUG_STACKOVERFLOW
+ /* Debugging check for stack overflow: is there less than 1KB free? */
+@@ -110,19 +113,20 @@ fastcall unsigned int do_IRQ(struct pt_r
+ (curctx->tinfo.preempt_count & SOFTIRQ_MASK);
+
+ asm volatile(
+- " xchgl %%ebx,%%esp \n"
+- " call __do_IRQ \n"
++ " xchgl %%ebx,%%esp \n"
++ " call *%%edi \n"
+ " movl %%ebx,%%esp \n"
+ : "=a" (arg1), "=d" (arg2), "=b" (ebx)
+- : "0" (irq), "1" (regs), "2" (isp)
+- : "memory", "cc", "ecx"
++ : "0" (irq), "1" (desc), "2" (isp),
++ "D" (desc->handle_irq)
++ : "memory", "cc"
+ );
+ } else
+ #endif
+- __do_IRQ(irq, regs);
++ desc->handle_irq(irq, desc);
+
+ /*irq_exit();*/
+-
++ set_irq_regs(old_regs);
+ return 1;
+ }
+
+@@ -253,7 +257,8 @@ int show_interrupts(struct seq_file *p,
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+ #endif
+- seq_printf(p, " %14s", irq_desc[i].chip->typename);
++ seq_printf(p, " %8s", irq_desc[i].chip->name);
++ seq_printf(p, "-%-8s", irq_desc[i].name);
+ seq_printf(p, " %s", action->name);
+
+ for (action=action->next; action; action = action->next)
+Index: head-2008-12-01/arch/x86/kernel/ldt_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ldt_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ldt_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -1,5 +1,5 @@
+ /*
+- * linux/kernel/ldt.c
++ * linux/arch/i386/kernel/ldt.c
+ *
+ * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
+ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
+Index: head-2008-12-01/arch/x86/kernel/microcode-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/microcode-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/microcode-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -2,6 +2,7 @@
+ * Intel CPU Microcode Update Driver for Linux
+ *
+ * Copyright (C) 2000-2004 Tigran Aivazian
++ * 2006 Shaohua Li <shaohua.li@intel.com>
+ *
+ * This driver allows to upgrade microcode on Intel processors
+ * belonging to IA-32 family - PentiumPro, Pentium II,
+@@ -33,7 +34,9 @@
+ #include <linux/spinlock.h>
+ #include <linux/mm.h>
+ #include <linux/mutex.h>
+-#include <linux/syscalls.h>
++#include <linux/cpu.h>
++#include <linux/firmware.h>
++#include <linux/platform_device.h>
+
+ #include <asm/msr.h>
+ #include <asm/uaccess.h>
+@@ -55,12 +58,7 @@ module_param(verbose, int, 0644);
+ /* no concurrent ->write()s are allowed on /dev/cpu/microcode */
+ static DEFINE_MUTEX(microcode_mutex);
+
+-static int microcode_open (struct inode *unused1, struct file *unused2)
+-{
+- return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+-}
+-
+-
++#ifdef CONFIG_MICROCODE_OLD_INTERFACE
+ static int do_microcode_update (const void __user *ubuf, size_t len)
+ {
+ int err;
+@@ -85,6 +83,11 @@ static int do_microcode_update (const vo
+ return err;
+ }
+
++static int microcode_open (struct inode *unused1, struct file *unused2)
++{
++ return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
++}
++
+ static ssize_t microcode_write (struct file *file, const char __user *buf, size_t len, loff_t *ppos)
+ {
+ ssize_t ret;
+@@ -117,7 +120,7 @@ static struct miscdevice microcode_dev =
+ .fops = µcode_fops,
+ };
+
+-static int __init microcode_init (void)
++static int __init microcode_dev_init (void)
+ {
+ int error;
+
+@@ -129,6 +132,68 @@ static int __init microcode_init (void)
+ return error;
+ }
+
++ return 0;
++}
++
++static void __exit microcode_dev_exit (void)
++{
++ misc_deregister(µcode_dev);
++}
++
++MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
++#else
++#define microcode_dev_init() 0
++#define microcode_dev_exit() do { } while(0)
++#endif
++
++/* fake device for request_firmware */
++static struct platform_device *microcode_pdev;
++
++static int request_microcode(void)
++{
++ char name[30];
++ const struct cpuinfo_x86 *c = &boot_cpu_data;
++ const struct firmware *firmware;
++ int error;
++ struct xen_platform_op op;
++
++ sprintf(name,"intel-ucode/%02x-%02x-%02x",
++ c->x86, c->x86_model, c->x86_mask);
++ error = request_firmware(&firmware, name, µcode_pdev->dev);
++ if (error) {
++ pr_debug("ucode data file %s load failed\n", name);
++ return error;
++ }
++
++ op.cmd = XENPF_microcode_update;
++ set_xen_guest_handle(op.u.microcode.data, (void *)firmware->data);
++ op.u.microcode.length = firmware->size;
++ error = HYPERVISOR_platform_op(&op);
++
++ release_firmware(firmware);
++
++ if (error)
++ pr_debug("ucode load failed\n");
++
++ return error;
++}
++
++static int __init microcode_init (void)
++{
++ int error;
++
++ error = microcode_dev_init();
++ if (error)
++ return error;
++ microcode_pdev = platform_device_register_simple("microcode", -1,
++ NULL, 0);
++ if (IS_ERR(microcode_pdev)) {
++ microcode_dev_exit();
++ return PTR_ERR(microcode_pdev);
++ }
++
++ request_microcode();
++
+ printk(KERN_INFO
+ "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@veritas.com>\n");
+ return 0;
+@@ -136,9 +201,9 @@ static int __init microcode_init (void)
+
+ static void __exit microcode_exit (void)
+ {
+- misc_deregister(µcode_dev);
++ microcode_dev_exit();
++ platform_device_unregister(microcode_pdev);
+ }
+
+ module_init(microcode_init)
+ module_exit(microcode_exit)
+-MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
+Index: head-2008-12-01/arch/x86/kernel/mpparse_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/mpparse_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/mpparse_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -30,6 +30,7 @@
+ #include <asm/io_apic.h>
+
+ #include <mach_apic.h>
++#include <mach_apicdef.h>
+ #include <mach_mpparse.h>
+ #include <bios_ebda.h>
+
+@@ -68,7 +69,7 @@ unsigned int def_to_bigsmp = 0;
+ /* Processor that is doing the boot up */
+ unsigned int boot_cpu_physical_apicid = -1U;
+ /* Internal processor count */
+-static unsigned int __devinitdata num_processors;
++unsigned int __cpuinitdata num_processors;
+
+ /* Bitmask of physically existing CPUs */
+ physid_mask_t phys_cpu_present_map;
+@@ -235,12 +236,14 @@ static void __init MP_bus_info (struct m
+
+ mpc_oem_bus_info(m, str, translation_table[mpc_record]);
+
++#if MAX_MP_BUSSES < 256
+ if (m->mpc_busid >= MAX_MP_BUSSES) {
+ printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
+ " is too large, max. supported is %d\n",
+ m->mpc_busid, str, MAX_MP_BUSSES - 1);
+ return;
+ }
++#endif
+
+ if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA)-1) == 0) {
+ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
+@@ -300,19 +303,6 @@ static void __init MP_lintsrc_info (stru
+ m->mpc_irqtype, m->mpc_irqflag & 3,
+ (m->mpc_irqflag >> 2) &3, m->mpc_srcbusid,
+ m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
+- /*
+- * Well it seems all SMP boards in existence
+- * use ExtINT/LVT1 == LINT0 and
+- * NMI/LVT2 == LINT1 - the following check
+- * will show us if this assumptions is false.
+- * Until then we do not have to add baggage.
+- */
+- if ((m->mpc_irqtype == mp_ExtINT) &&
+- (m->mpc_destapiclint != 0))
+- BUG();
+- if ((m->mpc_irqtype == mp_NMI) &&
+- (m->mpc_destapiclint != 1))
+- BUG();
+ }
+
+ #ifdef CONFIG_X86_NUMAQ
+@@ -838,8 +828,7 @@ int es7000_plat;
+
+ #ifdef CONFIG_ACPI
+
+-void __init mp_register_lapic_address (
+- u64 address)
++void __init mp_register_lapic_address(u64 address)
+ {
+ #ifndef CONFIG_XEN
+ mp_lapic_addr = (unsigned long) address;
+@@ -853,13 +842,10 @@ void __init mp_register_lapic_address (
+ #endif
+ }
+
+-
+-void __devinit mp_register_lapic (
+- u8 id,
+- u8 enabled)
++void __devinit mp_register_lapic (u8 id, u8 enabled)
+ {
+ struct mpc_config_processor processor;
+- int boot_cpu = 0;
++ int boot_cpu = 0;
+
+ if (MAX_APICS - id <= 0) {
+ printk(KERN_WARNING "Processor #%d invalid (max %d)\n",
+@@ -898,11 +884,9 @@ static struct mp_ioapic_routing {
+ u32 pin_programmed[4];
+ } mp_ioapic_routing[MAX_IO_APICS];
+
+-
+-static int mp_find_ioapic (
+- int gsi)
++static int mp_find_ioapic (int gsi)
+ {
+- int i = 0;
++ int i = 0;
+
+ /* Find the IOAPIC that manages this GSI. */
+ for (i = 0; i < nr_ioapics; i++) {
+@@ -915,15 +899,11 @@ static int mp_find_ioapic (
+
+ return -1;
+ }
+-
+
+-void __init mp_register_ioapic (
+- u8 id,
+- u32 address,
+- u32 gsi_base)
++void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
+ {
+- int idx = 0;
+- int tmpid;
++ int idx = 0;
++ int tmpid;
+
+ if (nr_ioapics >= MAX_IO_APICS) {
+ printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
+@@ -971,16 +951,10 @@ void __init mp_register_ioapic (
+ mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
+ mp_ioapic_routing[idx].gsi_base,
+ mp_ioapic_routing[idx].gsi_end);
+-
+- return;
+ }
+
+-
+-void __init mp_override_legacy_irq (
+- u8 bus_irq,
+- u8 polarity,
+- u8 trigger,
+- u32 gsi)
++void __init
++mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
+ {
+ struct mpc_config_intsrc intsrc;
+ int ioapic = -1;
+@@ -1018,15 +992,13 @@ void __init mp_override_legacy_irq (
+ mp_irqs[mp_irq_entries] = intsrc;
+ if (++mp_irq_entries == MAX_IRQ_SOURCES)
+ panic("Max # of irq sources exceeded!\n");
+-
+- return;
+ }
+
+ void __init mp_config_acpi_legacy_irqs (void)
+ {
+ struct mpc_config_intsrc intsrc;
+- int i = 0;
+- int ioapic = -1;
++ int i = 0;
++ int ioapic = -1;
+
+ /*
+ * Fabricate the legacy ISA bus (bus #31).
+@@ -1095,12 +1067,12 @@ void __init mp_config_acpi_legacy_irqs (
+
+ #define MAX_GSI_NUM 4096
+
+-int mp_register_gsi (u32 gsi, int triggering, int polarity)
++int mp_register_gsi(u32 gsi, int triggering, int polarity)
+ {
+- int ioapic = -1;
+- int ioapic_pin = 0;
+- int idx, bit = 0;
+- static int pci_irq = 16;
++ int ioapic = -1;
++ int ioapic_pin = 0;
++ int idx, bit = 0;
++ static int pci_irq = 16;
+ /*
+ * Mapping between Global System Interrups, which
+ * represent all possible interrupts, and IRQs
+Index: head-2008-12-01/arch/x86/kernel/pci-dma-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/pci-dma-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -110,8 +110,7 @@ dma_map_sg(struct device *hwdev, struct
+ {
+ int i, rc;
+
+- if (direction == DMA_NONE)
+- BUG();
++ BUG_ON(!valid_dma_direction(direction));
+ WARN_ON(nents == 0 || sg[0].length == 0);
+
+ if (swiotlb) {
+@@ -142,7 +141,7 @@ dma_unmap_sg(struct device *hwdev, struc
+ {
+ int i;
+
+- BUG_ON(direction == DMA_NONE);
++ BUG_ON(!valid_dma_direction(direction));
+ if (swiotlb)
+ swiotlb_unmap_sg(hwdev, sg, nents, direction);
+ else {
+@@ -159,8 +158,7 @@ dma_map_page(struct device *dev, struct
+ {
+ dma_addr_t dma_addr;
+
+- BUG_ON(direction == DMA_NONE);
+-
++ BUG_ON(!valid_dma_direction(direction));
+ if (swiotlb) {
+ dma_addr = swiotlb_map_page(
+ dev, page, offset, size, direction);
+@@ -177,7 +175,7 @@ void
+ dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+ enum dma_data_direction direction)
+ {
+- BUG_ON(direction == DMA_NONE);
++ BUG_ON(!valid_dma_direction(direction));
+ if (swiotlb)
+ swiotlb_unmap_page(dev, dma_address, size, direction);
+ else
+@@ -359,8 +357,7 @@ dma_map_single(struct device *dev, void
+ {
+ dma_addr_t dma;
+
+- if (direction == DMA_NONE)
+- BUG();
++ BUG_ON(!valid_dma_direction(direction));
+ WARN_ON(size == 0);
+
+ if (swiotlb) {
+@@ -381,8 +378,7 @@ void
+ dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+ enum dma_data_direction direction)
+ {
+- if (direction == DMA_NONE)
+- BUG();
++ BUG_ON(!valid_dma_direction(direction));
+ if (swiotlb)
+ swiotlb_unmap_single(dev, dma_addr, size, direction);
+ else
+Index: head-2008-12-01/arch/x86/kernel/process_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -37,6 +37,7 @@
+ #include <linux/kallsyms.h>
+ #include <linux/ptrace.h>
+ #include <linux/random.h>
++#include <linux/personality.h>
+
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -186,7 +187,7 @@ void cpu_idle(void)
+ void cpu_idle_wait(void)
+ {
+ unsigned int cpu, this_cpu = get_cpu();
+- cpumask_t map;
++ cpumask_t map, tmp = current->cpus_allowed;
+
+ set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
+ put_cpu();
+@@ -208,6 +209,8 @@ void cpu_idle_wait(void)
+ }
+ cpus_and(map, map, cpu_online_map);
+ } while (!cpus_empty(map));
++
++ set_cpus_allowed(current, tmp);
+ }
+ EXPORT_SYMBOL_GPL(cpu_idle_wait);
+
+@@ -240,9 +243,9 @@ void show_regs(struct pt_regs * regs)
+ if (user_mode_vm(regs))
+ printk(" ESP: %04x:%08lx",0xffff & regs->xss,regs->esp);
+ printk(" EFLAGS: %08lx %s (%s %.*s)\n",
+- regs->eflags, print_tainted(), system_utsname.release,
+- (int)strcspn(system_utsname.version, " "),
+- system_utsname.version);
++ regs->eflags, print_tainted(), init_utsname()->release,
++ (int)strcspn(init_utsname()->version, " "),
++ init_utsname()->version);
+ printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
+ regs->eax,regs->ebx,regs->ecx,regs->edx);
+ printk("ESI: %08lx EDI: %08lx EBP: %08lx",
+@@ -264,15 +267,6 @@ void show_regs(struct pt_regs * regs)
+ * the "args".
+ */
+ extern void kernel_thread_helper(void);
+-__asm__(".section .text\n"
+- ".align 4\n"
+- "kernel_thread_helper:\n\t"
+- "movl %edx,%eax\n\t"
+- "pushl %edx\n\t"
+- "call *%ebx\n\t"
+- "pushl %eax\n\t"
+- "call do_exit\n"
+- ".previous");
+
+ /*
+ * Create a kernel thread
+@@ -290,7 +284,7 @@ int kernel_thread(int (*fn)(void *), voi
+ regs.xes = __USER_DS;
+ regs.orig_eax = -1;
+ regs.eip = (unsigned long) kernel_thread_helper;
+- regs.xcs = GET_KERNEL_CS();
++ regs.xcs = __KERNEL_CS | get_kernel_rpl();
+ regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
+
+ /* Ok, create the new process.. */
+@@ -369,13 +363,12 @@ int copy_thread(int nr, unsigned long cl
+
+ tsk = current;
+ if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
+- p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
++ p->thread.io_bitmap_ptr = kmemdup(tsk->thread.io_bitmap_ptr,
++ IO_BITMAP_BYTES, GFP_KERNEL);
+ if (!p->thread.io_bitmap_ptr) {
+ p->thread.io_bitmap_max = 0;
+ return -ENOMEM;
+ }
+- memcpy(p->thread.io_bitmap_ptr, tsk->thread.io_bitmap_ptr,
+- IO_BITMAP_BYTES);
+ set_tsk_thread_flag(p, TIF_IO_BITMAP);
+ }
+
+@@ -871,7 +864,7 @@ asmlinkage int sys_get_thread_area(struc
+
+ unsigned long arch_align_stack(unsigned long sp)
+ {
+- if (randomize_va_space)
++ if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+ sp -= get_random_int() % 8192;
+ return sp & ~0xf;
+ }
+Index: head-2008-12-01/arch/x86/kernel/setup_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -56,6 +56,7 @@
+ #include <asm/apic.h>
+ #include <asm/e820.h>
+ #include <asm/mpspec.h>
++#include <asm/mmzone.h>
+ #include <asm/setup.h>
+ #include <asm/arch_hooks.h>
+ #include <asm/sections.h>
+@@ -83,9 +84,6 @@ static struct notifier_block xen_panic_b
+ xen_panic_event, NULL, 0 /* try to go last */
+ };
+
+-extern char hypercall_page[PAGE_SIZE];
+-EXPORT_SYMBOL(hypercall_page);
+-
+ int disable_pse __devinitdata = 0;
+
+ /*
+@@ -105,18 +103,6 @@ EXPORT_SYMBOL(boot_cpu_data);
+
+ unsigned long mmu_cr4_features;
+
+-#ifdef CONFIG_ACPI
+- int acpi_disabled = 0;
+-#else
+- int acpi_disabled = 1;
+-#endif
+-EXPORT_SYMBOL(acpi_disabled);
+-
+-#ifdef CONFIG_ACPI
+-int __initdata acpi_force = 0;
+-extern acpi_interrupt_flags acpi_sci_flags;
+-#endif
+-
+ /* for MCA, but anyone else can use it if they want */
+ unsigned int machine_id;
+ #ifdef CONFIG_MCA
+@@ -170,7 +156,6 @@ struct e820map machine_e820;
+ #endif
+
+ extern void early_cpu_init(void);
+-extern void generic_apic_probe(char *);
+ extern int root_mountflags;
+
+ unsigned long saved_videomode;
+@@ -243,9 +228,6 @@ static struct resource adapter_rom_resou
+ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+ } };
+
+-#define ADAPTER_ROM_RESOURCES \
+- (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
+-
+ static struct resource video_rom_resource = {
+ .name = "Video ROM",
+ .start = 0xc0000,
+@@ -307,9 +289,6 @@ static struct resource standard_io_resou
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO
+ } };
+
+-#define STANDARD_IO_RESOURCES \
+- (sizeof standard_io_resources / sizeof standard_io_resources[0])
+-
+ #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
+
+ static int __init romchecksum(unsigned char *rom, unsigned long length)
+@@ -372,7 +351,7 @@ static void __init probe_roms(void)
+ }
+
+ /* check for adapter roms on 2k boundaries */
+- for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
++ for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
+ rom = isa_bus_to_virt(start);
+ if (!romsignature(rom))
+ continue;
+@@ -779,246 +758,152 @@ static inline void copy_edd(void)
+ }
+ #endif
+
+-static void __init parse_cmdline_early (char ** cmdline_p)
++static int __initdata user_defined_memmap = 0;
++
++/*
++ * "mem=nopentium" disables the 4MB page tables.
++ * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
++ * to <mem>, overriding the bios size.
++ * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
++ * <start> to <start>+<mem>, overriding the bios size.
++ *
++ * HPA tells me bootloaders need to parse mem=, so no new
++ * option should be mem= [also see Documentation/i386/boot.txt]
++ */
++static int __init parse_mem(char *arg)
+ {
+- char c = ' ', *to = command_line, *from = saved_command_line;
+- int len = 0, max_cmdline;
+- int userdef = 0;
+-
+- if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
+- max_cmdline = COMMAND_LINE_SIZE;
+- memcpy(saved_command_line, xen_start_info->cmd_line, max_cmdline);
+- /* Save unparsed command line copy for /proc/cmdline */
+- saved_command_line[max_cmdline-1] = '\0';
+-
+- for (;;) {
+- if (c != ' ')
+- goto next_char;
+- /*
+- * "mem=nopentium" disables the 4MB page tables.
+- * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
+- * to <mem>, overriding the bios size.
+- * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
+- * <start> to <start>+<mem>, overriding the bios size.
+- *
+- * HPA tells me bootloaders need to parse mem=, so no new
+- * option should be mem= [also see Documentation/i386/boot.txt]
+- */
+- if (!memcmp(from, "mem=", 4)) {
+- if (to != command_line)
+- to--;
+- if (!memcmp(from+4, "nopentium", 9)) {
+- from += 9+4;
+- clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
+- disable_pse = 1;
+- } else {
+- /* If the user specifies memory size, we
+- * limit the BIOS-provided memory map to
+- * that size. exactmap can be used to specify
+- * the exact map. mem=number can be used to
+- * trim the existing memory map.
+- */
+- unsigned long long mem_size;
+-
+- mem_size = memparse(from+4, &from);
+- limit_regions(mem_size);
+- userdef=1;
+- }
+- }
++ if (!arg)
++ return -EINVAL;
+
+- else if (!memcmp(from, "memmap=", 7)) {
+- if (to != command_line)
+- to--;
+- if (!memcmp(from+7, "exactmap", 8)) {
+-#ifdef CONFIG_CRASH_DUMP
+- /* If we are doing a crash dump, we
+- * still need to know the real mem
+- * size before original memory map is
+- * reset.
+- */
+- find_max_pfn();
+- saved_max_pfn = max_pfn;
+-#endif
+- from += 8+7;
+- e820.nr_map = 0;
+- userdef = 1;
+- } else {
+- /* If the user specifies memory size, we
+- * limit the BIOS-provided memory map to
+- * that size. exactmap can be used to specify
+- * the exact map. mem=number can be used to
+- * trim the existing memory map.
+- */
+- unsigned long long start_at, mem_size;
++ if (strcmp(arg, "nopentium") == 0) {
++ clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
++ disable_pse = 1;
++ } else {
++ /* If the user specifies memory size, we
++ * limit the BIOS-provided memory map to
++ * that size. exactmap can be used to specify
++ * the exact map. mem=number can be used to
++ * trim the existing memory map.
++ */
++ unsigned long long mem_size;
+
+- mem_size = memparse(from+7, &from);
+- if (*from == '@') {
+- start_at = memparse(from+1, &from);
+- add_memory_region(start_at, mem_size, E820_RAM);
+- } else if (*from == '#') {
+- start_at = memparse(from+1, &from);
+- add_memory_region(start_at, mem_size, E820_ACPI);
+- } else if (*from == '$') {
+- start_at = memparse(from+1, &from);
+- add_memory_region(start_at, mem_size, E820_RESERVED);
+- } else {
+- limit_regions(mem_size);
+- userdef=1;
+- }
+- }
+- }
+-
+- else if (!memcmp(from, "noexec=", 7))
+- noexec_setup(from + 7);
++ mem_size = memparse(arg, &arg);
++ limit_regions(mem_size);
++ user_defined_memmap = 1;
++ }
++ return 0;
++}
++early_param("mem", parse_mem);
+
++static int __init parse_memmap(char *arg)
++{
++ if (!arg)
++ return -EINVAL;
+
+-#ifdef CONFIG_X86_MPPARSE
+- /*
+- * If the BIOS enumerates physical processors before logical,
+- * maxcpus=N at enumeration-time can be used to disable HT.
++ if (strcmp(arg, "exactmap") == 0) {
++#ifdef CONFIG_CRASH_DUMP
++ /* If we are doing a crash dump, we
++ * still need to know the real mem
++ * size before original memory map is
++ * reset.
+ */
+- else if (!memcmp(from, "maxcpus=", 8)) {
+- extern unsigned int maxcpus;
+-
+- maxcpus = simple_strtoul(from + 8, NULL, 0);
+- }
++ find_max_pfn();
++ saved_max_pfn = max_pfn;
+ #endif
++ e820.nr_map = 0;
++ user_defined_memmap = 1;
++ } else {
++ /* If the user specifies memory size, we
++ * limit the BIOS-provided memory map to
++ * that size. exactmap can be used to specify
++ * the exact map. mem=number can be used to
++ * trim the existing memory map.
++ */
++ unsigned long long start_at, mem_size;
+
+-#ifdef CONFIG_ACPI
+- /* "acpi=off" disables both ACPI table parsing and interpreter */
+- else if (!memcmp(from, "acpi=off", 8)) {
+- disable_acpi();
+- }
+-
+- /* acpi=force to over-ride black-list */
+- else if (!memcmp(from, "acpi=force", 10)) {
+- acpi_force = 1;
+- acpi_ht = 1;
+- acpi_disabled = 0;
+- }
+-
+- /* acpi=strict disables out-of-spec workarounds */
+- else if (!memcmp(from, "acpi=strict", 11)) {
+- acpi_strict = 1;
+- }
+-
+- /* Limit ACPI just to boot-time to enable HT */
+- else if (!memcmp(from, "acpi=ht", 7)) {
+- if (!acpi_force)
+- disable_acpi();
+- acpi_ht = 1;
+- }
+-
+- /* "pci=noacpi" disable ACPI IRQ routing and PCI scan */
+- else if (!memcmp(from, "pci=noacpi", 10)) {
+- acpi_disable_pci();
+- }
+- /* "acpi=noirq" disables ACPI interrupt routing */
+- else if (!memcmp(from, "acpi=noirq", 10)) {
+- acpi_noirq_set();
++ mem_size = memparse(arg, &arg);
++ if (*arg == '@') {
++ start_at = memparse(arg+1, &arg);
++ add_memory_region(start_at, mem_size, E820_RAM);
++ } else if (*arg == '#') {
++ start_at = memparse(arg+1, &arg);
++ add_memory_region(start_at, mem_size, E820_ACPI);
++ } else if (*arg == '$') {
++ start_at = memparse(arg+1, &arg);
++ add_memory_region(start_at, mem_size, E820_RESERVED);
++ } else {
++ limit_regions(mem_size);
++ user_defined_memmap = 1;
+ }
++ }
++ return 0;
++}
++early_param("memmap", parse_memmap);
+
+- else if (!memcmp(from, "acpi_sci=edge", 13))
+- acpi_sci_flags.trigger = 1;
+-
+- else if (!memcmp(from, "acpi_sci=level", 14))
+- acpi_sci_flags.trigger = 3;
++#ifdef CONFIG_PROC_VMCORE
++/* elfcorehdr= specifies the location of elf core header
++ * stored by the crashed kernel.
++ */
++static int __init parse_elfcorehdr(char *arg)
++{
++ if (!arg)
++ return -EINVAL;
+
+- else if (!memcmp(from, "acpi_sci=high", 13))
+- acpi_sci_flags.polarity = 1;
++ elfcorehdr_addr = memparse(arg, &arg);
++ return 0;
++}
++early_param("elfcorehdr", parse_elfcorehdr);
++#endif /* CONFIG_PROC_VMCORE */
+
+- else if (!memcmp(from, "acpi_sci=low", 12))
+- acpi_sci_flags.polarity = 3;
++/*
++ * highmem=size forces highmem to be exactly 'size' bytes.
++ * This works even on boxes that have no highmem otherwise.
++ * This also works to reduce highmem size on bigger boxes.
++ */
++static int __init parse_highmem(char *arg)
++{
++ if (!arg)
++ return -EINVAL;
+
+-#ifdef CONFIG_X86_IO_APIC
+- else if (!memcmp(from, "acpi_skip_timer_override", 24))
+- acpi_skip_timer_override = 1;
++ highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
++ return 0;
++}
++early_param("highmem", parse_highmem);
+
+- if (!memcmp(from, "disable_timer_pin_1", 19))
+- disable_timer_pin_1 = 1;
+- if (!memcmp(from, "enable_timer_pin_1", 18))
+- disable_timer_pin_1 = -1;
+-
+- /* disable IO-APIC */
+- else if (!memcmp(from, "noapic", 6))
+- disable_ioapic_setup();
+-#endif /* CONFIG_X86_IO_APIC */
+-#endif /* CONFIG_ACPI */
++/*
++ * vmalloc=size forces the vmalloc area to be exactly 'size'
++ * bytes. This can be used to increase (or decrease) the
++ * vmalloc area - the default is 128m.
++ */
++static int __init parse_vmalloc(char *arg)
++{
++ if (!arg)
++ return -EINVAL;
+
+-#ifdef CONFIG_X86_LOCAL_APIC
+- /* enable local APIC */
+- else if (!memcmp(from, "lapic", 5))
+- lapic_enable();
+-
+- /* disable local APIC */
+- else if (!memcmp(from, "nolapic", 6))
+- lapic_disable();
+-#endif /* CONFIG_X86_LOCAL_APIC */
++ __VMALLOC_RESERVE = memparse(arg, &arg);
++ return 0;
++}
++early_param("vmalloc", parse_vmalloc);
+
+-#ifdef CONFIG_KEXEC
+- /* crashkernel=size@addr specifies the location to reserve for
+- * a crash kernel. By reserving this memory we guarantee
+- * that linux never set's it up as a DMA target.
+- * Useful for holding code to do something appropriate
+- * after a kernel panic.
+- */
+- else if (!memcmp(from, "crashkernel=", 12)) {
+ #ifndef CONFIG_XEN
+- unsigned long size, base;
+- size = memparse(from+12, &from);
+- if (*from == '@') {
+- base = memparse(from+1, &from);
+- /* FIXME: Do I want a sanity check
+- * to validate the memory range?
+- */
+- crashk_res.start = base;
+- crashk_res.end = base + size - 1;
+- }
+-#else
+- printk("Ignoring crashkernel command line, "
+- "parameter will be supplied by xen\n");
+-#endif
+- }
+-#endif
+-#ifdef CONFIG_PROC_VMCORE
+- /* elfcorehdr= specifies the location of elf core header
+- * stored by the crashed kernel.
+- */
+- else if (!memcmp(from, "elfcorehdr=", 11))
+- elfcorehdr_addr = memparse(from+11, &from);
+-#endif
++/*
++ * reservetop=size reserves a hole at the top of the kernel address space which
++ * a hypervisor can load into later. Needed for dynamically loaded hypervisors,
++ * so relocating the fixmap can be done before paging initialization.
++ */
++static int __init parse_reservetop(char *arg)
++{
++ unsigned long address;
+
+- /*
+- * highmem=size forces highmem to be exactly 'size' bytes.
+- * This works even on boxes that have no highmem otherwise.
+- * This also works to reduce highmem size on bigger boxes.
+- */
+- else if (!memcmp(from, "highmem=", 8))
+- highmem_pages = memparse(from+8, &from) >> PAGE_SHIFT;
+-
+- /*
+- * vmalloc=size forces the vmalloc area to be exactly 'size'
+- * bytes. This can be used to increase (or decrease) the
+- * vmalloc area - the default is 128m.
+- */
+- else if (!memcmp(from, "vmalloc=", 8))
+- __VMALLOC_RESERVE = memparse(from+8, &from);
++ if (!arg)
++ return -EINVAL;
+
+- next_char:
+- c = *(from++);
+- if (!c)
+- break;
+- if (COMMAND_LINE_SIZE <= ++len)
+- break;
+- *(to++) = c;
+- }
+- *to = '\0';
+- *cmdline_p = command_line;
+- if (userdef) {
+- printk(KERN_INFO "user-defined physical RAM map:\n");
+- print_memory_map("user");
+- }
++ address = memparse(arg, &arg);
++ reserve_top_address(address);
++ return 0;
+ }
++early_param("reservetop", parse_reservetop);
++#endif
+
+ /*
+ * Callback for efi_memory_walk.
+@@ -1039,7 +924,7 @@ efi_find_max_pfn(unsigned long start, un
+ static int __init
+ efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
+ {
+- memory_present(0, start, end);
++ memory_present(0, PFN_UP(start), PFN_DOWN(end));
+ return 0;
+ }
+
+@@ -1306,6 +1191,14 @@ static unsigned long __init setup_memory
+ }
+ printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
+ pages_to_mb(highend_pfn - highstart_pfn));
++ num_physpages = highend_pfn;
++ high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
++#else
++ num_physpages = max_low_pfn;
++ high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
++#endif
++#ifdef CONFIG_FLATMEM
++ max_mapnr = num_physpages;
+ #endif
+ printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
+ pages_to_mb(max_low_pfn));
+@@ -1317,22 +1210,19 @@ static unsigned long __init setup_memory
+
+ void __init zone_sizes_init(void)
+ {
+- unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};
+- unsigned int max_dma, low;
+-
+- max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+- low = max_low_pfn;
+-
+- if (low < max_dma)
+- zones_size[ZONE_DMA] = low;
+- else {
+- zones_size[ZONE_DMA] = max_dma;
+- zones_size[ZONE_NORMAL] = low - max_dma;
++ unsigned long max_zone_pfns[MAX_NR_ZONES];
++ memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
++ max_zone_pfns[ZONE_DMA] =
++ virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
++ max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+ #ifdef CONFIG_HIGHMEM
+- zones_size[ZONE_HIGHMEM] = highend_pfn - low;
++ max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
++ add_active_range(0, 0, highend_pfn);
++#else
++ add_active_range(0, 0, max_low_pfn);
+ #endif
+- }
+- free_area_init(zones_size);
++
++ free_area_init_nodes(max_zone_pfns);
+ }
+ #else
+ extern unsigned long __init setup_memory(void);
+@@ -1389,6 +1279,7 @@ void __init setup_bootmem_allocator(void
+ */
+ acpi_reserve_bootmem();
+ #endif
++ numa_kva_reserve();
+ #endif /* !CONFIG_XEN */
+
+ #ifdef CONFIG_BLK_DEV_INITRD
+@@ -1574,7 +1465,7 @@ static int __init request_standard_resou
+ request_resource(&iomem_resource, &video_ram_resource);
+
+ /* request I/O space for devices used on all i[345]86 PCs */
+- for (i = 0; i < STANDARD_IO_RESOURCES; i++)
++ for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+ request_resource(&ioport_resource, &standard_io_resources[i]);
+ return 0;
+ }
+@@ -1705,17 +1596,19 @@ void __init setup_arch(char **cmdline_p)
+ data_resource.start = virt_to_phys(_etext);
+ data_resource.end = virt_to_phys(_edata)-1;
+
+- parse_cmdline_early(cmdline_p);
++ if ((i = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
++ i = COMMAND_LINE_SIZE;
++ memcpy(saved_command_line, xen_start_info->cmd_line, i);
++ saved_command_line[i - 1] = '\0';
++ parse_early_param();
+
+-#ifdef CONFIG_EARLY_PRINTK
+- {
+- char *s = strstr(*cmdline_p, "earlyprintk=");
+- if (s) {
+- setup_early_printk(strchr(s, '=') + 1);
+- printk("early console enabled\n");
+- }
++ if (user_defined_memmap) {
++ printk(KERN_INFO "user-defined physical RAM map:\n");
++ print_memory_map("user");
+ }
+-#endif
++
++ strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
++ *cmdline_p = command_line;
+
+ max_low_pfn = setup_memory();
+
+@@ -1822,7 +1715,7 @@ void __init setup_arch(char **cmdline_p)
+ dmi_scan_machine();
+
+ #ifdef CONFIG_X86_GENERICARCH
+- generic_apic_probe(*cmdline_p);
++ generic_apic_probe();
+ #endif
+ if (efi_enabled)
+ efi_map_memmap();
+@@ -1843,9 +1736,11 @@ void __init setup_arch(char **cmdline_p)
+ acpi_boot_table_init();
+ #endif
+
++#ifdef CONFIG_PCI
+ #ifdef CONFIG_X86_IO_APIC
+ check_acpi_pci(); /* Checks more than just ACPI actually */
+ #endif
++#endif
+
+ #ifdef CONFIG_ACPI
+ acpi_boot_init();
+Index: head-2008-12-01/arch/x86/kernel/smp_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -279,8 +279,7 @@ static inline void leave_mm (unsigned lo
+ * 2) Leave the mm if we are in the lazy tlb mode.
+ */
+
+-irqreturn_t smp_invalidate_interrupt(int irq, void *dev_id,
+- struct pt_regs *regs)
++irqreturn_t smp_invalidate_interrupt(int irq, void *dev_id)
+ {
+ unsigned long cpu;
+
+@@ -567,16 +566,14 @@ void smp_send_stop(void)
+ * all the work is done automatically when
+ * we return from the interrupt.
+ */
+-irqreturn_t smp_reschedule_interrupt(int irq, void *dev_id,
+- struct pt_regs *regs)
++irqreturn_t smp_reschedule_interrupt(int irq, void *dev_id)
+ {
+
+ return IRQ_HANDLED;
+ }
+
+ #include <linux/kallsyms.h>
+-irqreturn_t smp_call_function_interrupt(int irq, void *dev_id,
+- struct pt_regs *regs)
++irqreturn_t smp_call_function_interrupt(int irq, void *dev_id)
+ {
+ void (*func) (void *info) = call_data->func;
+ void *info = call_data->info;
+@@ -603,3 +600,69 @@ irqreturn_t smp_call_function_interrupt(
+ return IRQ_HANDLED;
+ }
+
++/*
++ * this function sends a 'generic call function' IPI to one other CPU
++ * in the system.
++ *
++ * cpu is a standard Linux logical CPU number.
++ */
++static void
++__smp_call_function_single(int cpu, void (*func) (void *info), void *info,
++ int nonatomic, int wait)
++{
++ struct call_data_struct data;
++ int cpus = 1;
++
++ data.func = func;
++ data.info = info;
++ atomic_set(&data.started, 0);
++ data.wait = wait;
++ if (wait)
++ atomic_set(&data.finished, 0);
++
++ call_data = &data;
++ wmb();
++ /* Send a message to all other CPUs and wait for them to respond */
++ send_IPI_mask(cpumask_of_cpu(cpu), CALL_FUNCTION_VECTOR);
++
++ /* Wait for response */
++ while (atomic_read(&data.started) != cpus)
++ cpu_relax();
++
++ if (!wait)
++ return;
++
++ while (atomic_read(&data.finished) != cpus)
++ cpu_relax();
++}
++
++/*
++ * smp_call_function_single - Run a function on another CPU
++ * @func: The function to run. This must be fast and non-blocking.
++ * @info: An arbitrary pointer to pass to the function.
++ * @nonatomic: Currently unused.
++ * @wait: If true, wait until function has completed on other CPUs.
++ *
++ * Retrurns 0 on success, else a negative status code.
++ *
++ * Does not return until the remote CPU is nearly ready to execute <func>
++ * or is or has executed.
++ */
++
++int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
++ int nonatomic, int wait)
++{
++ /* prevent preemption and reschedule on another processor */
++ int me = get_cpu();
++ if (cpu == me) {
++ WARN_ON(1);
++ put_cpu();
++ return -EBUSY;
++ }
++ spin_lock_bh(&call_lock);
++ __smp_call_function_single(cpu, func, info, nonatomic, wait);
++ spin_unlock_bh(&call_lock);
++ put_cpu();
++ return 0;
++}
++EXPORT_SYMBOL(smp_call_function_single);
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -89,7 +89,6 @@ int pit_latch_buggy; /* ext
+ unsigned long vxtime_hz = PIT_TICK_RATE;
+ struct vxtime_data __vxtime __section_vxtime; /* for vsyscalls */
+ volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
+-unsigned long __wall_jiffies __section_wall_jiffies = INITIAL_JIFFIES;
+ struct timespec __xtime __section_xtime;
+ struct timezone __sys_tz __section_sys_tz;
+ #endif
+@@ -97,8 +96,6 @@ struct timezone __sys_tz __section_sys_t
+ unsigned int cpu_khz; /* Detected as we calibrate the TSC */
+ EXPORT_SYMBOL(cpu_khz);
+
+-extern unsigned long wall_jiffies;
+-
+ DEFINE_SPINLOCK(rtc_lock);
+ EXPORT_SYMBOL(rtc_lock);
+
+@@ -265,11 +262,10 @@ static void __update_wallclock(time_t se
+ time_t wtm_sec, xtime_sec;
+ u64 tmp, wc_nsec;
+
+- /* Adjust wall-clock time base based on wall_jiffies ticks. */
++ /* Adjust wall-clock time base. */
+ wc_nsec = processed_system_time;
+ wc_nsec += sec * (u64)NSEC_PER_SEC;
+ wc_nsec += nsec;
+- wc_nsec -= (jiffies - wall_jiffies) * (u64)NS_PER_TICK;
+
+ /* Split wallclock base into seconds and nanoseconds. */
+ tmp = wc_nsec;
+@@ -394,16 +390,10 @@ void do_gettimeofday(struct timeval *tv)
+ shadow = &per_cpu(shadow_time, cpu);
+
+ do {
+- unsigned long lost;
+-
+ local_time_version = shadow->version;
+ seq = read_seqbegin(&xtime_lock);
+
+ usec = get_usec_offset(shadow);
+- lost = jiffies - wall_jiffies;
+-
+- if (unlikely(lost))
+- usec += lost * (USEC_PER_SEC / HZ);
+
+ sec = xtime.tv_sec;
+ usec += (xtime.tv_nsec / NSEC_PER_USEC);
+@@ -526,7 +516,7 @@ static void sync_xen_wallclock(unsigned
+ write_seqlock_irq(&xtime_lock);
+
+ sec = xtime.tv_sec;
+- nsec = xtime.tv_nsec + ((jiffies - wall_jiffies) * (u64)NS_PER_TICK);
++ nsec = xtime.tv_nsec;
+ __normalize_time(&sec, &nsec);
+
+ op.cmd = XENPF_settime;
+@@ -600,42 +590,49 @@ unsigned long long sched_clock(void)
+ }
+ #endif
+
+-#if defined(CONFIG_SMP) && defined(CONFIG_FRAME_POINTER)
+ unsigned long profile_pc(struct pt_regs *regs)
+ {
+ unsigned long pc = instruction_pointer(regs);
+
+-#ifdef __x86_64__
+- /* Assume the lock function has either no stack frame or only a single word.
+- This checks if the address on the stack looks like a kernel text address.
+- There is a small window for false hits, but in that case the tick
+- is just accounted to the spinlock function.
+- Better would be to write these functions in assembler again
+- and check exactly. */
++#if defined(CONFIG_SMP) || defined(__x86_64__)
+ if (!user_mode_vm(regs) && in_lock_functions(pc)) {
+- char *v = *(char **)regs->rsp;
+- if ((v >= _stext && v <= _etext) ||
+- (v >= _sinittext && v <= _einittext) ||
+- (v >= (char *)MODULES_VADDR && v <= (char *)MODULES_END))
+- return (unsigned long)v;
+- return ((unsigned long *)regs->rsp)[1];
++# ifdef CONFIG_FRAME_POINTER
++# ifdef __i386__
++ return ((unsigned long *)regs->ebp)[1];
++# else
++ return ((unsigned long *)regs->rbp)[1];
++# endif
++# else
++# ifdef __i386__
++ unsigned long *sp;
++ if ((regs->xcs & 2) == 0)
++ sp = (unsigned long *)®s->esp;
++ else
++ sp = (unsigned long *)regs->esp;
++# else
++ unsigned long *sp = (unsigned long *)regs->rsp;
++# endif
++ /* Return address is either directly at stack pointer
++ or above a saved eflags. Eflags has bits 22-31 zero,
++ kernel addresses don't. */
++ if (sp[0] >> 22)
++ return sp[0];
++ if (sp[1] >> 22)
++ return sp[1];
++# endif
+ }
+-#else
+- if (!user_mode_vm(regs) && in_lock_functions(pc))
+- return *(unsigned long *)(regs->ebp + 4);
+ #endif
+
+ return pc;
+ }
+ EXPORT_SYMBOL(profile_pc);
+-#endif
+
+ /*
+ * This is the same as the above, except we _also_ save the current
+ * Time Stamp Counter value at the time of the timer interrupt, so that
+ * we later on can estimate the time of day more exactly.
+ */
+-irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
++irqreturn_t timer_interrupt(int irq, void *dev_id)
+ {
+ s64 delta, delta_cpu, stolen, blocked;
+ u64 sched_time;
+@@ -693,10 +690,14 @@ irqreturn_t timer_interrupt(int irq, voi
+ }
+
+ /* System-wide jiffy work. */
+- while (delta >= NS_PER_TICK) {
+- delta -= NS_PER_TICK;
+- processed_system_time += NS_PER_TICK;
+- do_timer(regs);
++ if (delta >= NS_PER_TICK) {
++ do_div(delta, NS_PER_TICK);
++ processed_system_time += delta * NS_PER_TICK;
++ while (delta > HZ) {
++ do_timer(HZ);
++ delta -= HZ;
++ }
++ do_timer(delta);
+ }
+
+ if (shadow_tv_version != HYPERVISOR_shared_info->wc_version) {
+@@ -741,7 +742,7 @@ irqreturn_t timer_interrupt(int irq, voi
+ if (delta_cpu > 0) {
+ do_div(delta_cpu, NS_PER_TICK);
+ per_cpu(processed_system_time, cpu) += delta_cpu * NS_PER_TICK;
+- if (user_mode_vm(regs))
++ if (user_mode_vm(get_irq_regs()))
+ account_user_time(current, (cputime_t)delta_cpu);
+ else
+ account_system_time(current, HARDIRQ_OFFSET,
+@@ -755,10 +756,10 @@ irqreturn_t timer_interrupt(int irq, voi
+ /* Local timer processing (see update_process_times()). */
+ run_local_timers();
+ if (rcu_pending(cpu))
+- rcu_check_callbacks(cpu, user_mode_vm(regs));
++ rcu_check_callbacks(cpu, user_mode_vm(get_irq_regs()));
+ scheduler_tick();
+ run_posix_cpu_timers(current);
+- profile_tick(CPU_PROFILING, regs);
++ profile_tick(CPU_PROFILING);
+
+ return IRQ_HANDLED;
+ }
+@@ -968,10 +969,11 @@ extern void (*late_time_init)(void);
+ /* Duplicate of time_init() below, with hpet_enable part added */
+ static void __init hpet_time_init(void)
+ {
+- xtime.tv_sec = get_cmos_time();
+- xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
+- set_normalized_timespec(&wall_to_monotonic,
+- -xtime.tv_sec, -xtime.tv_nsec);
++ struct timespec ts;
++ ts.tv_sec = get_cmos_time();
++ ts.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
++
++ do_settimeofday(&ts);
+
+ if ((hpet_enable() >= 0) && hpet_use_timer) {
+ printk("Using HPET for base-timer\n");
+Index: head-2008-12-01/arch/x86/kernel/traps_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -28,6 +28,7 @@
+ #include <linux/kprobes.h>
+ #include <linux/kexec.h>
+ #include <linux/unwind.h>
++#include <linux/uaccess.h>
+
+ #ifdef CONFIG_EISA
+ #include <linux/ioport.h>
+@@ -40,7 +41,6 @@
+
+ #include <asm/processor.h>
+ #include <asm/system.h>
+-#include <asm/uaccess.h>
+ #include <asm/io.h>
+ #include <asm/atomic.h>
+ #include <asm/debugreg.h>
+@@ -51,11 +51,14 @@
+ #include <asm/smp.h>
+ #include <asm/arch_hooks.h>
+ #include <asm/kdebug.h>
++#include <asm/stacktrace.h>
+
+ #include <linux/module.h>
+
+ #include "mach_traps.h"
+
++int panic_on_unrecovered_nmi;
++
+ asmlinkage int system_call(void);
+
+ struct desc_struct default_ldt[] = { { 0, 0 }, { 0, 0 }, { 0, 0 },
+@@ -124,62 +127,63 @@ static inline int valid_stack_ptr(struct
+ p < (void *)tinfo + THREAD_SIZE - 3;
+ }
+
+-/*
+- * Print one address/symbol entries per line.
+- */
+-static inline void print_addr_and_symbol(unsigned long addr, char *log_lvl)
+-{
+- printk(" [<%08lx>] ", addr);
+-
+- print_symbol("%s\n", addr);
+-}
+-
+ static inline unsigned long print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long ebp,
+- char *log_lvl)
++ struct stacktrace_ops *ops, void *data)
+ {
+ unsigned long addr;
+
+ #ifdef CONFIG_FRAME_POINTER
+ while (valid_stack_ptr(tinfo, (void *)ebp)) {
++ unsigned long new_ebp;
+ addr = *(unsigned long *)(ebp + 4);
+- print_addr_and_symbol(addr, log_lvl);
++ ops->address(data, addr);
+ /*
+ * break out of recursive entries (such as
+- * end_of_stack_stop_unwind_function):
++ * end_of_stack_stop_unwind_function). Also,
++ * we can never allow a frame pointer to
++ * move downwards!
+ */
+- if (ebp == *(unsigned long *)ebp)
++ new_ebp = *(unsigned long *)ebp;
++ if (new_ebp <= ebp)
+ break;
+- ebp = *(unsigned long *)ebp;
++ ebp = new_ebp;
+ }
+ #else
+ while (valid_stack_ptr(tinfo, stack)) {
+ addr = *stack++;
+ if (__kernel_text_address(addr))
+- print_addr_and_symbol(addr, log_lvl);
++ ops->address(data, addr);
+ }
+ #endif
+ return ebp;
+ }
+
++struct ops_and_data {
++ struct stacktrace_ops *ops;
++ void *data;
++};
++
+ static asmlinkage int
+-show_trace_unwind(struct unwind_frame_info *info, void *log_lvl)
++dump_trace_unwind(struct unwind_frame_info *info, void *data)
+ {
++ struct ops_and_data *oad = (struct ops_and_data *)data;
+ int n = 0;
+
+ while (unwind(info) == 0 && UNW_PC(info)) {
+ n++;
+- print_addr_and_symbol(UNW_PC(info), log_lvl);
++ oad->ops->address(oad->data, UNW_PC(info));
+ if (arch_unw_user_mode(info))
+ break;
+ }
+ return n;
+ }
+
+-static void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+- unsigned long *stack, char *log_lvl)
++void dump_trace(struct task_struct *task, struct pt_regs *regs,
++ unsigned long *stack,
++ struct stacktrace_ops *ops, void *data)
+ {
+- unsigned long ebp;
++ unsigned long ebp = 0;
+
+ if (!task)
+ task = current;
+@@ -187,54 +191,116 @@ static void show_trace_log_lvl(struct ta
+ if (call_trace >= 0) {
+ int unw_ret = 0;
+ struct unwind_frame_info info;
++ struct ops_and_data oad = { .ops = ops, .data = data };
+
+ if (regs) {
+ if (unwind_init_frame_info(&info, task, regs) == 0)
+- unw_ret = show_trace_unwind(&info, log_lvl);
++ unw_ret = dump_trace_unwind(&info, &oad);
+ } else if (task == current)
+- unw_ret = unwind_init_running(&info, show_trace_unwind, log_lvl);
++ unw_ret = unwind_init_running(&info, dump_trace_unwind, &oad);
+ else {
+ if (unwind_init_blocked(&info, task) == 0)
+- unw_ret = show_trace_unwind(&info, log_lvl);
++ unw_ret = dump_trace_unwind(&info, &oad);
+ }
+ if (unw_ret > 0) {
+ if (call_trace == 1 && !arch_unw_user_mode(&info)) {
+- print_symbol("DWARF2 unwinder stuck at %s\n",
++ ops->warning_symbol(data, "DWARF2 unwinder stuck at %s\n",
+ UNW_PC(&info));
+ if (UNW_SP(&info) >= PAGE_OFFSET) {
+- printk("Leftover inexact backtrace:\n");
++ ops->warning(data, "Leftover inexact backtrace:\n");
+ stack = (void *)UNW_SP(&info);
++ if (!stack)
++ return;
++ ebp = UNW_FP(&info);
+ } else
+- printk("Full inexact backtrace again:\n");
++ ops->warning(data, "Full inexact backtrace again:\n");
+ } else if (call_trace >= 1)
+ return;
+ else
+- printk("Full inexact backtrace again:\n");
++ ops->warning(data, "Full inexact backtrace again:\n");
+ } else
+- printk("Inexact backtrace:\n");
++ ops->warning(data, "Inexact backtrace:\n");
+ }
+-
+- if (task == current) {
+- /* Grab ebp right from our regs */
+- asm ("movl %%ebp, %0" : "=r" (ebp) : );
+- } else {
+- /* ebp is the last reg pushed by switch_to */
+- ebp = *(unsigned long *) task->thread.esp;
++ if (!stack) {
++ unsigned long dummy;
++ stack = &dummy;
++ if (task && task != current)
++ stack = (unsigned long *)task->thread.esp;
++ }
++
++#ifdef CONFIG_FRAME_POINTER
++ if (!ebp) {
++ if (task == current) {
++ /* Grab ebp right from our regs */
++ asm ("movl %%ebp, %0" : "=r" (ebp) : );
++ } else {
++ /* ebp is the last reg pushed by switch_to */
++ ebp = *(unsigned long *) task->thread.esp;
++ }
+ }
++#endif
+
+ while (1) {
+ struct thread_info *context;
+ context = (struct thread_info *)
+ ((unsigned long)stack & (~(THREAD_SIZE - 1)));
+- ebp = print_context_stack(context, stack, ebp, log_lvl);
++ ebp = print_context_stack(context, stack, ebp, ops, data);
++ /* Should be after the line below, but somewhere
++ in early boot context comes out corrupted and we
++ can't reference it -AK */
++ if (ops->stack(data, "IRQ") < 0)
++ break;
+ stack = (unsigned long*)context->previous_esp;
+ if (!stack)
+ break;
+- printk("%s =======================\n", log_lvl);
+ }
+ }
++EXPORT_SYMBOL(dump_trace);
++
++static void
++print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
++{
++ printk(data);
++ print_symbol(msg, symbol);
++ printk("\n");
++}
++
++static void print_trace_warning(void *data, char *msg)
++{
++ printk("%s%s\n", (char *)data, msg);
++}
+
+-void show_trace(struct task_struct *task, struct pt_regs *regs, unsigned long * stack)
++static int print_trace_stack(void *data, char *name)
++{
++ return 0;
++}
++
++/*
++ * Print one address/symbol entries per line.
++ */
++static void print_trace_address(void *data, unsigned long addr)
++{
++ printk("%s [<%08lx>] ", (char *)data, addr);
++ print_symbol("%s\n", addr);
++}
++
++static struct stacktrace_ops print_trace_ops = {
++ .warning = print_trace_warning,
++ .warning_symbol = print_trace_warning_symbol,
++ .stack = print_trace_stack,
++ .address = print_trace_address,
++};
++
++static void
++show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
++ unsigned long * stack, char *log_lvl)
++{
++ dump_trace(task, regs, stack, &print_trace_ops, log_lvl);
++ printk("%s =======================\n", log_lvl);
++}
++
++void show_trace(struct task_struct *task, struct pt_regs *regs,
++ unsigned long * stack)
+ {
+ show_trace_log_lvl(task, regs, stack, "");
+ }
+@@ -297,12 +363,13 @@ void show_registers(struct pt_regs *regs
+ ss = regs->xss & 0xffff;
+ }
+ print_modules();
+- printk(KERN_EMERG "CPU: %d\nEIP: %04x:[<%08lx>] %s VLI\n"
+- "EFLAGS: %08lx (%s %.*s) \n",
++ printk(KERN_EMERG "CPU: %d\n"
++ KERN_EMERG "EIP: %04x:[<%08lx>] %s VLI\n"
++ KERN_EMERG "EFLAGS: %08lx (%s %.*s)\n",
+ smp_processor_id(), 0xffff & regs->xcs, regs->eip,
+- print_tainted(), regs->eflags, system_utsname.release,
+- (int)strcspn(system_utsname.version, " "),
+- system_utsname.version);
++ print_tainted(), regs->eflags, init_utsname()->release,
++ (int)strcspn(init_utsname()->version, " "),
++ init_utsname()->version);
+ print_symbol(KERN_EMERG "EIP is at %s\n", regs->eip);
+ printk(KERN_EMERG "eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
+ regs->eax, regs->ebx, regs->ecx, regs->edx);
+@@ -319,6 +386,8 @@ void show_registers(struct pt_regs *regs
+ */
+ if (in_kernel) {
+ u8 __user *eip;
++ int code_bytes = 64;
++ unsigned char c;
+
+ printk("\n" KERN_EMERG "Stack: ");
+ show_stack_log_lvl(NULL, regs, (unsigned long *)esp, KERN_EMERG);
+@@ -326,9 +395,12 @@ void show_registers(struct pt_regs *regs
+ printk(KERN_EMERG "Code: ");
+
+ eip = (u8 __user *)regs->eip - 43;
+- for (i = 0; i < 64; i++, eip++) {
+- unsigned char c;
+-
++ if (eip < (u8 __user *)PAGE_OFFSET || __get_user(c, eip)) {
++ /* try starting at EIP */
++ eip = (u8 __user *)regs->eip;
++ code_bytes = 32;
++ }
++ for (i = 0; i < code_bytes; i++, eip++) {
+ if (eip < (u8 __user *)PAGE_OFFSET || __get_user(c, eip)) {
+ printk(" Bad EIP value.");
+ break;
+@@ -349,7 +421,7 @@ static void handle_BUG(struct pt_regs *r
+
+ if (eip < PAGE_OFFSET)
+ return;
+- if (__get_user(ud2, (unsigned short __user *)eip))
++ if (probe_kernel_address((unsigned short __user *)eip, ud2))
+ return;
+ if (ud2 != 0x0b0f)
+ return;
+@@ -362,7 +434,8 @@ static void handle_BUG(struct pt_regs *r
+ char *file;
+ char c;
+
+- if (__get_user(line, (unsigned short __user *)(eip + 2)))
++ if (probe_kernel_address((unsigned short __user *)(eip + 2),
++ line))
+ break;
+ if (__get_user(file, (char * __user *)(eip + 4)) ||
+ (unsigned long)file < PAGE_OFFSET || __get_user(c, file))
+@@ -604,18 +677,24 @@ gp_in_kernel:
+ }
+ }
+
+-static void mem_parity_error(unsigned char reason, struct pt_regs * regs)
++static __kprobes void
++mem_parity_error(unsigned char reason, struct pt_regs * regs)
+ {
+- printk(KERN_EMERG "Uhhuh. NMI received. Dazed and confused, but trying "
+- "to continue\n");
++ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
++ "CPU %d.\n", reason, smp_processor_id());
+ printk(KERN_EMERG "You probably have a hardware problem with your RAM "
+ "chips\n");
++ if (panic_on_unrecovered_nmi)
++ panic("NMI: Not continuing");
++
++ printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+
+ /* Clear and disable the memory parity error line. */
+ clear_mem_error(reason);
+ }
+
+-static void io_check_error(unsigned char reason, struct pt_regs * regs)
++static __kprobes void
++io_check_error(unsigned char reason, struct pt_regs * regs)
+ {
+ printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
+ show_registers(regs);
+@@ -624,7 +703,8 @@ static void io_check_error(unsigned char
+ clear_io_check_error(reason);
+ }
+
+-static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
++static __kprobes void
++unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
+ {
+ #ifdef CONFIG_MCA
+ /* Might actually be able to figure out what the guilty party
+@@ -634,15 +714,18 @@ static void unknown_nmi_error(unsigned c
+ return;
+ }
+ #endif
+- printk("Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
+- reason, smp_processor_id());
+- printk("Dazed and confused, but trying to continue\n");
+- printk("Do you have a strange power saving mode enabled?\n");
++ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
++ "CPU %d.\n", reason, smp_processor_id());
++ printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
++ if (panic_on_unrecovered_nmi)
++ panic("NMI: Not continuing");
++
++ printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+ }
+
+ static DEFINE_SPINLOCK(nmi_print_lock);
+
+-void die_nmi (struct pt_regs *regs, const char *msg)
++void __kprobes die_nmi(struct pt_regs *regs, const char *msg)
+ {
+ if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 2, SIGINT) ==
+ NOTIFY_STOP)
+@@ -674,7 +757,7 @@ void die_nmi (struct pt_regs *regs, cons
+ do_exit(SIGSEGV);
+ }
+
+-static void default_do_nmi(struct pt_regs * regs)
++static __kprobes void default_do_nmi(struct pt_regs * regs)
+ {
+ unsigned char reason = 0;
+
+@@ -691,12 +774,12 @@ static void default_do_nmi(struct pt_reg
+ * Ok, so this is none of the documented NMI sources,
+ * so it must be the NMI watchdog.
+ */
+- if (nmi_watchdog) {
+- nmi_watchdog_tick(regs);
++ if (nmi_watchdog_tick(regs, reason))
+ return;
+- }
++ if (!do_nmi_callback(regs, smp_processor_id()))
+ #endif
+- unknown_nmi_error(reason, regs);
++ unknown_nmi_error(reason, regs);
++
+ return;
+ }
+ if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
+@@ -712,14 +795,7 @@ static void default_do_nmi(struct pt_reg
+ reassert_nmi();
+ }
+
+-static int dummy_nmi_callback(struct pt_regs * regs, int cpu)
+-{
+- return 0;
+-}
+-
+-static nmi_callback_t nmi_callback = dummy_nmi_callback;
+-
+-fastcall void do_nmi(struct pt_regs * regs, long error_code)
++fastcall __kprobes void do_nmi(struct pt_regs * regs, long error_code)
+ {
+ int cpu;
+
+@@ -729,25 +805,11 @@ fastcall void do_nmi(struct pt_regs * re
+
+ ++nmi_count(cpu);
+
+- if (!rcu_dereference(nmi_callback)(regs, cpu))
+- default_do_nmi(regs);
++ default_do_nmi(regs);
+
+ nmi_exit();
+ }
+
+-void set_nmi_callback(nmi_callback_t callback)
+-{
+- vmalloc_sync_all();
+- rcu_assign_pointer(nmi_callback, callback);
+-}
+-EXPORT_SYMBOL_GPL(set_nmi_callback);
+-
+-void unset_nmi_callback(void)
+-{
+- nmi_callback = dummy_nmi_callback;
+-}
+-EXPORT_SYMBOL_GPL(unset_nmi_callback);
+-
+ #ifdef CONFIG_KPROBES
+ fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
+ {
+Index: head-2008-12-01/arch/x86/mach-xen/setup.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mach-xen/setup.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mach-xen/setup.c 2008-12-01 11:29:05.000000000 +0100
+@@ -103,8 +103,10 @@ void __init pre_setup_arch_hook(void)
+
+ setup_xen_features();
+
+- if (HYPERVISOR_xen_version(XENVER_platform_parameters, &pp) == 0)
+- set_fixaddr_top(pp.virt_start);
++ if (HYPERVISOR_xen_version(XENVER_platform_parameters, &pp) == 0) {
++ hypervisor_virt_start = pp.virt_start;
++ reserve_top_address(0UL - pp.virt_start);
++ }
+
+ if (HYPERVISOR_memory_op(XENMEM_machphys_mapping, &mapping) == 0) {
+ machine_to_phys_mapping = (unsigned long *)mapping.v_start;
+Index: head-2008-12-01/arch/x86/mm/fault_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -27,21 +27,24 @@
+ #include <asm/uaccess.h>
+ #include <asm/desc.h>
+ #include <asm/kdebug.h>
++#include <asm/segment.h>
+
+ extern void die(const char *,struct pt_regs *,long);
+
+-#ifdef CONFIG_KPROBES
+-ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
++static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
++
+ int register_page_fault_notifier(struct notifier_block *nb)
+ {
+ vmalloc_sync_all();
+ return atomic_notifier_chain_register(¬ify_page_fault_chain, nb);
+ }
++EXPORT_SYMBOL_GPL(register_page_fault_notifier);
+
+ int unregister_page_fault_notifier(struct notifier_block *nb)
+ {
+ return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb);
+ }
++EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
+
+ static inline int notify_page_fault(enum die_val val, const char *str,
+ struct pt_regs *regs, long err, int trap, int sig)
+@@ -55,14 +58,6 @@ static inline int notify_page_fault(enum
+ };
+ return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args);
+ }
+-#else
+-static inline int notify_page_fault(enum die_val val, const char *str,
+- struct pt_regs *regs, long err, int trap, int sig)
+-{
+- return NOTIFY_DONE;
+-}
+-#endif
+-
+
+ /*
+ * Unlock any spinlocks which will prevent us from getting the
+@@ -119,10 +114,10 @@ static inline unsigned long get_segment_
+ }
+
+ /* The standard kernel/user address space limit. */
+- *eip_limit = (seg & 2) ? USER_DS.seg : KERNEL_DS.seg;
++ *eip_limit = user_mode(regs) ? USER_DS.seg : KERNEL_DS.seg;
+
+ /* By far the most common cases. */
+- if (likely(seg == __USER_CS || seg == GET_KERNEL_CS()))
++ if (likely(SEGMENT_IS_FLAT_CODE(seg)))
+ return eip;
+
+ /* Check the segment exists, is within the current LDT/GDT size,
+@@ -559,11 +554,7 @@ good_area:
+ write = 0;
+ switch (error_code & 3) {
+ default: /* 3: write, present */
+-#ifdef TEST_VERIFY_AREA
+- if (regs->cs == GET_KERNEL_CS())
+- printk("WP fault at %08lx\n", regs->eip);
+-#endif
+- /* fall through */
++ /* fall through */
+ case 2: /* write, not present */
+ if (!(vma->vm_flags & VM_WRITE))
+ goto bad_area;
+@@ -572,7 +563,7 @@ good_area:
+ case 1: /* read, present */
+ goto bad_area;
+ case 0: /* read, not present */
+- if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
++ if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
+ goto bad_area;
+ }
+
+@@ -704,7 +695,7 @@ no_context:
+ */
+ out_of_memory:
+ up_read(&mm->mmap_sem);
+- if (tsk->pid == 1) {
++ if (is_init(tsk)) {
+ yield();
+ down_read(&mm->mmap_sem);
+ goto survive;
+Index: head-2008-12-01/arch/x86/mm/highmem_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/highmem_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/highmem_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -38,11 +38,9 @@ static void *__kmap_atomic(struct page *
+
+ idx = type + KM_TYPE_NR*smp_processor_id();
+ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
+-#ifdef CONFIG_DEBUG_HIGHMEM
+ if (!pte_none(*(kmap_pte-idx)))
+ BUG();
+-#endif
+- set_pte_at_sync(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
++ set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
+
+ return (void*) vaddr;
+ }
+@@ -62,36 +60,26 @@ void *kmap_atomic_pte(struct page *page,
+
+ void kunmap_atomic(void *kvaddr, enum km_type type)
+ {
+-#if defined(CONFIG_DEBUG_HIGHMEM) || defined(CONFIG_XEN)
+ unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
+ enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
+
+- if (vaddr < FIXADDR_START) { // FIXME
++#ifdef CONFIG_DEBUG_HIGHMEM
++ if (vaddr >= PAGE_OFFSET && vaddr < (unsigned long)high_memory) {
+ dec_preempt_count();
+ preempt_check_resched();
+ return;
+ }
+-#endif
+
+-#if defined(CONFIG_DEBUG_HIGHMEM)
+ if (vaddr != __fix_to_virt(FIX_KMAP_BEGIN+idx))
+ BUG();
+-
+- /*
+- * force other mappings to Oops if they'll try to access
+- * this pte without first remap it
+- */
+- pte_clear(&init_mm, vaddr, kmap_pte-idx);
+- __flush_tlb_one(vaddr);
+-#elif defined(CONFIG_XEN)
++#endif
+ /*
+- * We must ensure there are no dangling pagetable references when
+- * returning memory to Xen (decrease_reservation).
+- * XXX TODO: We could make this faster by only zapping when
+- * kmap_flush_unused is called but that is trickier and more invasive.
++ * Force other mappings to Oops if they'll try to access this pte
++ * without first remap it. Keeping stale mappings around is a bad idea
++ * also, in case the page changes cacheability attributes or becomes
++ * a protected page in a hypervisor.
+ */
+- pte_clear(&init_mm, vaddr, kmap_pte-idx);
+-#endif
++ kpte_clear_flush(kmap_pte-idx, vaddr);
+
+ dec_preempt_count();
+ preempt_check_resched();
+@@ -110,7 +98,6 @@ void *kmap_atomic_pfn(unsigned long pfn,
+ idx = type + KM_TYPE_NR*smp_processor_id();
+ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
+ set_pte(kmap_pte-idx, pfn_pte(pfn, kmap_prot));
+- __flush_tlb_one(vaddr);
+
+ return (void*) vaddr;
+ }
+Index: head-2008-12-01/arch/x86/mm/hypervisor.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/hypervisor.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/hypervisor.c 2008-12-01 11:29:05.000000000 +0100
+@@ -31,6 +31,7 @@
+ */
+
+ #include <linux/sched.h>
++#include <linux/hardirq.h>
+ #include <linux/mm.h>
+ #include <linux/vmalloc.h>
+ #include <asm/page.h>
+@@ -44,6 +45,302 @@
+ #include <asm/tlbflush.h>
+ #include <linux/highmem.h>
+
++EXPORT_SYMBOL(hypercall_page);
++
++#define NR_MC BITS_PER_LONG
++#define NR_MMU BITS_PER_LONG
++#define NR_MMUEXT (BITS_PER_LONG / 4)
++
++DEFINE_PER_CPU(bool, xen_lazy_mmu);
++EXPORT_PER_CPU_SYMBOL(xen_lazy_mmu);
++struct lazy_mmu {
++ unsigned int nr_mc, nr_mmu, nr_mmuext;
++ multicall_entry_t mc[NR_MC];
++ mmu_update_t mmu[NR_MMU];
++ struct mmuext_op mmuext[NR_MMUEXT];
++};
++static DEFINE_PER_CPU(struct lazy_mmu, lazy_mmu);
++
++static inline bool use_lazy_mmu_mode(void)
++{
++#ifdef CONFIG_PREEMPT
++ if (!preempt_count())
++ return false;
++#endif
++ return !irq_count();
++}
++
++static void multicall_failed(const multicall_entry_t *mc, int rc)
++{
++ printk(KERN_EMERG "hypercall#%lu(%lx, %lx, %lx, %lx)"
++ " failed: %d (caller %lx)\n",
++ mc->op, mc->args[0], mc->args[1], mc->args[2], mc->args[3],
++ rc, mc->args[5]);
++ BUG();
++}
++
++int xen_multicall_flush(bool ret_last) {
++ struct lazy_mmu *lazy = &__get_cpu_var(lazy_mmu);
++ multicall_entry_t *mc = lazy->mc;
++ unsigned int count = lazy->nr_mc;
++
++ if (!count || !use_lazy_mmu_mode())
++ return 0;
++
++ lazy->nr_mc = 0;
++ lazy->nr_mmu = 0;
++ lazy->nr_mmuext = 0;
++
++ if (count == 1) {
++ int rc = _hypercall(int, mc->op, mc->args[0], mc->args[1],
++ mc->args[2], mc->args[3], mc->args[4]);
++
++ if (unlikely(rc)) {
++ if (ret_last)
++ return rc;
++ multicall_failed(mc, rc);
++ }
++ } else {
++ if (HYPERVISOR_multicall(mc, count))
++ BUG();
++ while (count-- > ret_last)
++ if (unlikely(mc++->result))
++ multicall_failed(mc - 1, mc[-1].result);
++ if (ret_last)
++ return mc->result;
++ }
++
++ return 0;
++}
++EXPORT_SYMBOL(xen_multicall_flush);
++
++int xen_multi_update_va_mapping(unsigned long va, pte_t pte,
++ unsigned long uvmf)
++{
++ struct lazy_mmu *lazy = &__get_cpu_var(lazy_mmu);
++ multicall_entry_t *mc;
++
++ if (unlikely(!use_lazy_mmu_mode()))
++#ifdef CONFIG_X86_PAE
++ return _hypercall4(int, update_va_mapping, va,
++ pte.pte_low, pte.pte_high, uvmf);
++#else
++ return _hypercall3(int, update_va_mapping, va,
++ pte.pte, uvmf);
++#endif
++
++ if (unlikely(lazy->nr_mc == NR_MC))
++ xen_multicall_flush(false);
++
++ mc = lazy->mc + lazy->nr_mc++;
++ mc->op = __HYPERVISOR_update_va_mapping;
++ mc->args[0] = va;
++#ifndef CONFIG_X86_PAE
++ mc->args[1] = pte.pte;
++#else
++ mc->args[1] = pte.pte_low;
++ mc->args[2] = pte.pte_high;
++#endif
++ mc->args[MULTI_UVMFLAGS_INDEX] = uvmf;
++ mc->args[5] = (long)__builtin_return_address(0);
++
++ return 0;
++}
++
++static inline bool mmu_may_merge(const multicall_entry_t *mc,
++ unsigned int op, domid_t domid)
++{
++ return mc->op == op && !mc->args[2] && mc->args[3] == domid;
++}
++
++int xen_multi_mmu_update(mmu_update_t *src, unsigned int count,
++ unsigned int *success_count, domid_t domid)
++{
++ struct lazy_mmu *lazy = &__get_cpu_var(lazy_mmu);
++ multicall_entry_t *mc = lazy->mc + lazy->nr_mc;
++ mmu_update_t *dst;
++ bool commit, merge;
++
++ if (unlikely(!use_lazy_mmu_mode()))
++ return _hypercall4(int, mmu_update, src, count,
++ success_count, domid);
++
++ commit = (lazy->nr_mmu + count) > NR_MMU || success_count;
++ merge = lazy->nr_mc && !commit
++ && mmu_may_merge(mc - 1, __HYPERVISOR_mmu_update, domid);
++ if (unlikely(lazy->nr_mc == NR_MC) && !merge) {
++ xen_multicall_flush(false);
++ mc = lazy->mc;
++ commit = count > NR_MMU || success_count;
++ }
++
++ if (!lazy->nr_mc && unlikely(commit))
++ return _hypercall4(int, mmu_update, src, count,
++ success_count, domid);
++
++ dst = lazy->mmu + lazy->nr_mmu;
++ lazy->nr_mmu += count;
++ if (merge) {
++ mc[-1].args[1] += count;
++ memcpy(dst, src, count * sizeof(*src));
++ } else {
++ ++lazy->nr_mc;
++ mc->op = __HYPERVISOR_mmu_update;
++ if (!commit) {
++ mc->args[0] = (unsigned long)dst;
++ memcpy(dst, src, count * sizeof(*src));
++ } else
++ mc->args[0] = (unsigned long)src;
++ mc->args[1] = count;
++ mc->args[2] = (unsigned long)success_count;
++ mc->args[3] = domid;
++ mc->args[5] = (long)__builtin_return_address(0);
++ }
++
++ while (!commit && count--)
++ switch (src++->ptr & (sizeof(pteval_t) - 1)) {
++ case MMU_NORMAL_PT_UPDATE:
++ case MMU_PT_UPDATE_PRESERVE_AD:
++ break;
++ default:
++ commit = true;
++ break;
++ }
++
++ return commit ? xen_multicall_flush(true) : 0;
++}
++
++int xen_multi_mmuext_op(struct mmuext_op *src, unsigned int count,
++ unsigned int *success_count, domid_t domid)
++{
++ struct lazy_mmu *lazy = &__get_cpu_var(lazy_mmu);
++ multicall_entry_t *mc;
++ struct mmuext_op *dst;
++ bool commit, merge;
++
++ if (unlikely(!use_lazy_mmu_mode()))
++ return _hypercall4(int, mmuext_op, src, count,
++ success_count, domid);
++
++ /*
++ * While it could be useful in theory, I've never seen the body of
++ * this conditional to be reached, hence it seems more reasonable
++ * to disable it for the time being.
++ */
++ if (0 && likely(count)
++ && likely(!success_count)
++ && likely(domid == DOMID_SELF)
++ && likely(lazy->nr_mc)
++ && lazy->mc[lazy->nr_mc - 1].op == __HYPERVISOR_update_va_mapping) {
++ unsigned long oldf, newf = UVMF_NONE;
++
++ switch (src->cmd) {
++ case MMUEXT_TLB_FLUSH_ALL:
++ newf = UVMF_TLB_FLUSH | UVMF_ALL;
++ break;
++ case MMUEXT_INVLPG_ALL:
++ newf = UVMF_INVLPG | UVMF_ALL;
++ break;
++ case MMUEXT_TLB_FLUSH_MULTI:
++ newf = UVMF_TLB_FLUSH | UVMF_MULTI
++ | (unsigned long)src->arg2.vcpumask.p;
++ break;
++ case MMUEXT_INVLPG_MULTI:
++ newf = UVMF_INVLPG | UVMF_MULTI
++ | (unsigned long)src->arg2.vcpumask.p;
++ break;
++ case MMUEXT_TLB_FLUSH_LOCAL:
++ newf = UVMF_TLB_FLUSH | UVMF_LOCAL;
++ break;
++ case MMUEXT_INVLPG_LOCAL:
++ newf = UVMF_INVLPG | UVMF_LOCAL;
++ break;
++ }
++ mc = lazy->mc + lazy->nr_mc - 1;
++ oldf = mc->args[MULTI_UVMFLAGS_INDEX];
++ if (newf == UVMF_NONE || oldf == UVMF_NONE
++ || newf == (UVMF_TLB_FLUSH | UVMF_ALL))
++ ;
++ else if (oldf == (UVMF_TLB_FLUSH | UVMF_ALL))
++ newf = UVMF_TLB_FLUSH | UVMF_ALL;
++ else if ((newf & UVMF_FLUSHTYPE_MASK) == UVMF_INVLPG
++ && (oldf & UVMF_FLUSHTYPE_MASK) == UVMF_INVLPG
++ && ((src->arg1.linear_addr ^ mc->args[0])
++ >> PAGE_SHIFT))
++ newf = UVMF_NONE;
++ else if (((oldf | newf) & UVMF_ALL)
++ && !((oldf ^ newf) & UVMF_FLUSHTYPE_MASK))
++ newf |= UVMF_ALL;
++ else if ((oldf ^ newf) & ~UVMF_FLUSHTYPE_MASK)
++ newf = UVMF_NONE;
++ else if ((oldf & UVMF_FLUSHTYPE_MASK) == UVMF_TLB_FLUSH)
++ newf = (newf & ~UVMF_FLUSHTYPE_MASK) | UVMF_TLB_FLUSH;
++ else if ((newf & UVMF_FLUSHTYPE_MASK) != UVMF_TLB_FLUSH
++ && ((newf ^ oldf) & UVMF_FLUSHTYPE_MASK))
++ newf = UVMF_NONE;
++ if (newf != UVMF_NONE) {
++ mc->args[MULTI_UVMFLAGS_INDEX] = newf;
++ ++src;
++ if (!--count)
++ return 0;
++ }
++ }
++
++ mc = lazy->mc + lazy->nr_mc;
++ commit = (lazy->nr_mmuext + count) > NR_MMUEXT || success_count;
++ merge = lazy->nr_mc && !commit
++ && mmu_may_merge(mc - 1, __HYPERVISOR_mmuext_op, domid);
++ if (unlikely(lazy->nr_mc == NR_MC) && !merge) {
++ xen_multicall_flush(false);
++ mc = lazy->mc;
++ commit = count > NR_MMUEXT || success_count;
++ }
++
++ if (!lazy->nr_mc && unlikely(commit))
++ return _hypercall4(int, mmuext_op, src, count,
++ success_count, domid);
++
++ dst = lazy->mmuext + lazy->nr_mmuext;
++ lazy->nr_mmuext += count;
++ if (merge) {
++ mc[-1].args[1] += count;
++ memcpy(dst, src, count * sizeof(*src));
++ } else {
++ ++lazy->nr_mc;
++ mc->op = __HYPERVISOR_mmuext_op;
++ if (!commit) {
++ mc->args[0] = (unsigned long)dst;
++ memcpy(dst, src, count * sizeof(*src));
++ } else
++ mc->args[0] = (unsigned long)src;
++ mc->args[1] = count;
++ mc->args[2] = (unsigned long)success_count;
++ mc->args[3] = domid;
++ mc->args[5] = (long)__builtin_return_address(0);
++ }
++
++ while (!commit && count--)
++ switch (src++->cmd) {
++ case MMUEXT_PIN_L1_TABLE:
++ case MMUEXT_PIN_L2_TABLE:
++ case MMUEXT_PIN_L3_TABLE:
++ case MMUEXT_PIN_L4_TABLE:
++ case MMUEXT_UNPIN_TABLE:
++ case MMUEXT_TLB_FLUSH_LOCAL:
++ case MMUEXT_INVLPG_LOCAL:
++ case MMUEXT_TLB_FLUSH_MULTI:
++ case MMUEXT_INVLPG_MULTI:
++ case MMUEXT_TLB_FLUSH_ALL:
++ case MMUEXT_INVLPG_ALL:
++ break;
++ default:
++ commit = true;
++ break;
++ }
++
++ return commit ? xen_multicall_flush(true) : 0;
++}
++
+ void xen_l1_entry_update(pte_t *ptr, pte_t val)
+ {
+ mmu_update_t u;
+@@ -547,7 +844,8 @@ int write_ldt_entry(void *ldt, int entry
+ #define MAX_BATCHED_FULL_PTES 32
+
+ int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
+- unsigned long addr, unsigned long end, pgprot_t newprot)
++ unsigned long addr, unsigned long end, pgprot_t newprot,
++ int dirty_accountable)
+ {
+ int rc = 0, i = 0;
+ mmu_update_t u[MAX_BATCHED_FULL_PTES];
+@@ -560,10 +858,14 @@ int xen_change_pte_range(struct mm_struc
+ pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
+ do {
+ if (pte_present(*pte)) {
++ pte_t ptent = pte_modify(*pte, newprot);
++
++ if (dirty_accountable && pte_dirty(ptent))
++ ptent = pte_mkwrite(ptent);
+ u[i].ptr = (__pmd_val(*pmd) & PHYSICAL_PAGE_MASK)
+ | ((unsigned long)pte & ~PAGE_MASK)
+ | MMU_PT_UPDATE_PRESERVE_AD;
+- u[i].val = __pte_val(pte_modify(*pte, newprot));
++ u[i].val = __pte_val(ptent);
+ if (++i == MAX_BATCHED_FULL_PTES) {
+ if ((rc = HYPERVISOR_mmu_update(
+ &u[0], i, NULL, DOMID_SELF)) != 0)
+Index: head-2008-12-01/arch/x86/mm/init_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -462,16 +462,22 @@ EXPORT_SYMBOL(__supported_pte_mask);
+ * on Enable
+ * off Disable
+ */
+-void __init noexec_setup(const char *str)
++static int __init noexec_setup(char *str)
+ {
+- if (!strncmp(str, "on",2) && cpu_has_nx) {
+- __supported_pte_mask |= _PAGE_NX;
+- disable_nx = 0;
+- } else if (!strncmp(str,"off",3)) {
++ if (!str || !strcmp(str, "on")) {
++ if (cpu_has_nx) {
++ __supported_pte_mask |= _PAGE_NX;
++ disable_nx = 0;
++ }
++ } else if (!strcmp(str,"off")) {
+ disable_nx = 1;
+ __supported_pte_mask &= ~_PAGE_NX;
+- }
++ } else
++ return -EINVAL;
++
++ return 0;
+ }
++early_param("noexec", noexec_setup);
+
+ int nx_enabled = 0;
+ #ifdef CONFIG_X86_PAE
+@@ -514,6 +520,7 @@ int __init set_kernel_exec(unsigned long
+ pte->pte_high &= ~(1 << (_PAGE_BIT_NX - 32));
+ else
+ pte->pte_high |= 1 << (_PAGE_BIT_NX - 32);
++ pte_update_defer(&init_mm, vaddr, pte);
+ __flush_tlb_all();
+ out:
+ return ret;
+@@ -596,18 +603,6 @@ static void __init test_wp_bit(void)
+ }
+ }
+
+-static void __init set_max_mapnr_init(void)
+-{
+-#ifdef CONFIG_HIGHMEM
+- num_physpages = highend_pfn;
+-#else
+- num_physpages = max_low_pfn;
+-#endif
+-#ifdef CONFIG_FLATMEM
+- max_mapnr = num_physpages;
+-#endif
+-}
+-
+ static struct kcore_list kcore_mem, kcore_vmalloc;
+
+ void __init mem_init(void)
+@@ -623,8 +618,7 @@ void __init mem_init(void)
+ #endif
+
+ #ifdef CONFIG_FLATMEM
+- if (!mem_map)
+- BUG();
++ BUG_ON(!mem_map);
+ #endif
+
+ bad_ppro = ppro_with_ram_bug();
+@@ -639,17 +633,6 @@ void __init mem_init(void)
+ }
+ #endif
+
+- set_max_mapnr_init();
+-
+-#ifdef CONFIG_HIGHMEM
+- high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
+-#else
+- high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
+-#endif
+- printk("vmalloc area: %lx-%lx, maxmem %lx\n",
+- VMALLOC_START,VMALLOC_END,MAXMEM);
+- BUG_ON(VMALLOC_START > VMALLOC_END);
+-
+ /* this will put all low memory onto the freelists */
+ totalram_pages += free_all_bootmem();
+ /* XEN: init and count low-mem pages outside initial allocation. */
+@@ -687,6 +670,48 @@ void __init mem_init(void)
+ (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))
+ );
+
++#if 1 /* double-sanity-check paranoia */
++ printk("virtual kernel memory layout:\n"
++ " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
++#ifdef CONFIG_HIGHMEM
++ " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
++#endif
++ " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
++ " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
++ " .init : 0x%08lx - 0x%08lx (%4ld kB)\n"
++ " .data : 0x%08lx - 0x%08lx (%4ld kB)\n"
++ " .text : 0x%08lx - 0x%08lx (%4ld kB)\n",
++ FIXADDR_START, FIXADDR_TOP,
++ (FIXADDR_TOP - FIXADDR_START) >> 10,
++
++#ifdef CONFIG_HIGHMEM
++ PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
++ (LAST_PKMAP*PAGE_SIZE) >> 10,
++#endif
++
++ VMALLOC_START, VMALLOC_END,
++ (VMALLOC_END - VMALLOC_START) >> 20,
++
++ (unsigned long)__va(0), (unsigned long)high_memory,
++ ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20,
++
++ (unsigned long)&__init_begin, (unsigned long)&__init_end,
++ ((unsigned long)&__init_end - (unsigned long)&__init_begin) >> 10,
++
++ (unsigned long)&_etext, (unsigned long)&_edata,
++ ((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
++
++ (unsigned long)&_text, (unsigned long)&_etext,
++ ((unsigned long)&_etext - (unsigned long)&_text) >> 10);
++
++#ifdef CONFIG_HIGHMEM
++ BUG_ON(PKMAP_BASE+LAST_PKMAP*PAGE_SIZE > FIXADDR_START);
++ BUG_ON(VMALLOC_END > PKMAP_BASE);
++#endif
++ BUG_ON(VMALLOC_START > VMALLOC_END);
++ BUG_ON((unsigned long)high_memory > VMALLOC_START);
++#endif /* double-sanity-check paranoia */
++
+ #ifdef CONFIG_X86_PAE
+ if (!cpu_has_pae)
+ panic("cannot execute a PAE-enabled kernel on a PAE-less CPU!");
+@@ -717,7 +742,7 @@ void __init mem_init(void)
+ int arch_add_memory(int nid, u64 start, u64 size)
+ {
+ struct pglist_data *pgdata = &contig_page_data;
+- struct zone *zone = pgdata->node_zones + MAX_NR_ZONES-1;
++ struct zone *zone = pgdata->node_zones + ZONE_HIGHMEM;
+ unsigned long start_pfn = start >> PAGE_SHIFT;
+ unsigned long nr_pages = size >> PAGE_SHIFT;
+
+Index: head-2008-12-01/arch/x86/mm/ioremap_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/ioremap_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/ioremap_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -12,7 +12,7 @@
+ #include <linux/init.h>
+ #include <linux/slab.h>
+ #include <linux/module.h>
+-#include <asm/io.h>
++#include <linux/io.h>
+ #include <asm/fixmap.h>
+ #include <asm/cacheflush.h>
+ #include <asm/tlbflush.h>
+@@ -118,7 +118,7 @@ int direct_remap_pfn_range(struct vm_are
+ if (domid == DOMID_SELF)
+ return -EINVAL;
+
+- vma->vm_flags |= VM_IO | VM_RESERVED;
++ vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
+
+ vma->vm_mm->context.has_foreign_mappings = 1;
+
+@@ -203,6 +203,7 @@ void __iomem * __ioremap(unsigned long p
+ void __iomem * addr;
+ struct vm_struct * area;
+ unsigned long offset, last_addr;
++ pgprot_t prot;
+ domid_t domid = DOMID_IO;
+
+ /* Don't allow wraparound or zero size */
+@@ -234,6 +235,8 @@ void __iomem * __ioremap(unsigned long p
+ domid = DOMID_SELF;
+ }
+
++ prot = __pgprot(_KERNPG_TABLE | flags);
++
+ /*
+ * Mappings have to be page-aligned
+ */
+@@ -249,10 +252,9 @@ void __iomem * __ioremap(unsigned long p
+ return NULL;
+ area->phys_addr = phys_addr;
+ addr = (void __iomem *) area->addr;
+- flags |= _KERNPG_TABLE;
+ if (__direct_remap_pfn_range(&init_mm, (unsigned long)addr,
+ phys_addr>>PAGE_SHIFT,
+- size, __pgprot(flags), domid)) {
++ size, prot, domid)) {
+ vunmap((void __force *) addr);
+ return NULL;
+ }
+Index: head-2008-12-01/arch/x86/mm/pgtable_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable_32-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -68,7 +68,9 @@ void show_mem(void)
+ printk(KERN_INFO "%lu pages writeback\n",
+ global_page_state(NR_WRITEBACK));
+ printk(KERN_INFO "%lu pages mapped\n", global_page_state(NR_FILE_MAPPED));
+- printk(KERN_INFO "%lu pages slab\n", global_page_state(NR_SLAB));
++ printk(KERN_INFO "%lu pages slab\n",
++ global_page_state(NR_SLAB_RECLAIMABLE) +
++ global_page_state(NR_SLAB_UNRECLAIMABLE));
+ printk(KERN_INFO "%lu pages pagetables\n",
+ global_page_state(NR_PAGETABLE));
+ }
+@@ -108,18 +110,11 @@ void set_pmd_pfn(unsigned long vaddr, un
+ __flush_tlb_one(vaddr);
+ }
+
+-static int nr_fixmaps = 0;
++static int fixmaps;
+ unsigned long hypervisor_virt_start = HYPERVISOR_VIRT_START;
+-unsigned long __FIXADDR_TOP = (HYPERVISOR_VIRT_START - 2 * PAGE_SIZE);
++unsigned long __FIXADDR_TOP = (HYPERVISOR_VIRT_START - PAGE_SIZE);
+ EXPORT_SYMBOL(__FIXADDR_TOP);
+
+-void __init set_fixaddr_top(unsigned long top)
+-{
+- BUG_ON(nr_fixmaps > 0);
+- hypervisor_virt_start = top;
+- __FIXADDR_TOP = hypervisor_virt_start - 2 * PAGE_SIZE;
+-}
+-
+ void __set_fixmap (enum fixed_addresses idx, maddr_t phys, pgprot_t flags)
+ {
+ unsigned long address = __fix_to_virt(idx);
+@@ -141,7 +136,21 @@ void __set_fixmap (enum fixed_addresses
+ if (HYPERVISOR_update_va_mapping(address, pte,
+ UVMF_INVLPG|UVMF_ALL))
+ BUG();
+- nr_fixmaps++;
++ fixmaps++;
++}
++
++/**
++ * reserve_top_address - reserves a hole in the top of kernel address space
++ * @reserve - size of hole to reserve
++ *
++ * Can be used to relocate the fixmap area and poke a hole in the top
++ * of kernel address space to make room for a hypervisor.
++ */
++void __init reserve_top_address(unsigned long reserve)
++{
++ BUG_ON(fixmaps > 0);
++ __FIXADDR_TOP = -reserve - PAGE_SIZE;
++ __VMALLOC_RESERVE += reserve;
+ }
+
+ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+Index: head-2008-12-01/arch/x86/pci/irq-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/pci/irq-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/pci/irq-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -991,10 +991,6 @@ static void __init pcibios_fixup_irqs(vo
+ pci_name(bridge), 'A' + pin, irq);
+ }
+ if (irq >= 0) {
+- if (use_pci_vector() &&
+- !platform_legacy_irq(irq))
+- irq = IO_APIC_VECTOR(irq);
+-
+ printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n",
+ pci_name(dev), 'A' + pin, irq);
+ dev->irq = irq;
+@@ -1155,10 +1151,6 @@ static int pirq_enable_irq(struct pci_de
+ }
+ dev = temp_dev;
+ if (irq >= 0) {
+-#ifdef CONFIG_PCI_MSI
+- if (!platform_legacy_irq(irq))
+- irq = IO_APIC_VECTOR(irq);
+-#endif
+ printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n",
+ pci_name(dev), 'A' + pin, irq);
+ dev->irq = irq;
+@@ -1179,33 +1171,3 @@ static int pirq_enable_irq(struct pci_de
+ }
+ return 0;
+ }
+-
+-int pci_vector_resources(int last, int nr_released)
+-{
+- int count = nr_released;
+-
+- int next = last;
+- int offset = (last % 8);
+-
+- while (next < FIRST_SYSTEM_VECTOR) {
+- next += 8;
+-#ifdef CONFIG_X86_64
+- if (next == IA32_SYSCALL_VECTOR)
+- continue;
+-#else
+- if (next == SYSCALL_VECTOR)
+- continue;
+-#endif
+- count++;
+- if (next >= FIRST_SYSTEM_VECTOR) {
+- if (offset%8) {
+- next = FIRST_DEVICE_VECTOR + offset;
+- offset++;
+- continue;
+- }
+- count--;
+- }
+- }
+-
+- return count;
+-}
+Index: head-2008-12-01/arch/x86/ia32/ia32entry-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/ia32/ia32entry-xen.S 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/ia32/ia32entry-xen.S 2008-12-01 11:29:05.000000000 +0100
+@@ -83,6 +83,7 @@
+ */
+ ENTRY(ia32_sysenter_target)
+ CFI_STARTPROC32 simple
++ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-RIP+16
+ /*CFI_REL_OFFSET ss,SS-RIP+16*/
+ CFI_REL_OFFSET rsp,RSP-RIP+16
+@@ -164,6 +165,7 @@ ENDPROC(ia32_sysenter_target)
+ */
+ ENTRY(ia32_cstar_target)
+ CFI_STARTPROC32 simple
++ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-RIP+16
+ /*CFI_REL_OFFSET ss,SS-RIP+16*/
+ CFI_REL_OFFSET rsp,RSP-RIP+16
+@@ -243,6 +245,7 @@ ia32_badarg:
+
+ ENTRY(ia32_syscall)
+ CFI_STARTPROC simple
++ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-RIP+16
+ /*CFI_REL_OFFSET ss,SS-RIP+16*/
+ CFI_REL_OFFSET rsp,RSP-RIP+16
+@@ -320,6 +323,7 @@ ENTRY(ia32_ptregs_common)
+ popq %r11
+ CFI_ENDPROC
+ CFI_STARTPROC32 simple
++ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-ARGOFFSET
+ CFI_REL_OFFSET rax,RAX-ARGOFFSET
+ CFI_REL_OFFSET rcx,RCX-ARGOFFSET
+@@ -653,8 +657,8 @@ ia32_sys_call_table:
+ .quad sys_readlinkat /* 305 */
+ .quad sys_fchmodat
+ .quad sys_faccessat
+- .quad quiet_ni_syscall /* pselect6 for now */
+- .quad quiet_ni_syscall /* ppoll for now */
++ .quad compat_sys_pselect6
++ .quad compat_sys_ppoll
+ .quad sys_unshare /* 310 */
+ .quad compat_sys_set_robust_list
+ .quad compat_sys_get_robust_list
+@@ -663,4 +667,5 @@ ia32_sys_call_table:
+ .quad sys_tee
+ .quad compat_sys_vmsplice
+ .quad compat_sys_move_pages
++ .quad sys_getcpu
+ ia32_syscall_end:
+Index: head-2008-12-01/arch/x86/kernel/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/Makefile 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/Makefile 2008-12-01 11:32:33.000000000 +0100
+@@ -104,9 +104,9 @@ obj-$(CONFIG_X86_XEN) += fixup.o
+ ###
+ # 64 bit specific files
+ ifeq ($(CONFIG_X86_64),y)
+- obj-y += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o
+- obj-$(CONFIG_X86_XEN_GENAPIC) += genapic_xen_64.o
+- obj-y += bios_uv.o
++ obj-$(CONFIG_X86_LOCAL_APIC) += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o
++ obj-$(CONFIG_X86_XEN_GENAPIC) += genapic_64.o genapic_xen_64.o
++ obj-y += tlb_uv.o bios_uv.o
+ obj-$(CONFIG_X86_PM_TIMER) += pmtimer_64.o
+ obj-$(CONFIG_AUDIT) += audit_64.o
+
+@@ -124,5 +124,7 @@ ifeq ($(CONFIG_X86_64),y)
+ pci-dma_64-$(CONFIG_XEN) += pci-dma_32.o
+ endif
+
+-disabled-obj-$(CONFIG_XEN) := i8253.o i8259_$(BITS).o reboot.o smpboot_$(BITS).o tsc_$(BITS).o
++disabled-obj-$(CONFIG_XEN) := early-quirks.o i8253.o i8259_$(BITS).o reboot.o \
++ smpboot_$(BITS).o tsc_$(BITS).o
++disabled-obj-$(CONFIG_XEN_UNPRIVILEGED_GUEST) += mpparse_64.o
+ %/head_$(BITS).o %/head_$(BITS).s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
+Index: head-2008-12-01/arch/x86/kernel/apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/apic_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/apic_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -43,7 +43,7 @@ int apic_verbosity;
+ */
+ void ack_bad_irq(unsigned int irq)
+ {
+- printk("unexpected IRQ trap at vector %02x\n", irq);
++ printk("unexpected IRQ trap at irq %02x\n", irq);
+ /*
+ * Currently unexpected vectors happen only on SMP and APIC.
+ * We _must_ ack these because every local APIC has only N
+@@ -62,19 +62,19 @@ int setup_profiling_timer(unsigned int m
+ return -EINVAL;
+ }
+
+-void smp_local_timer_interrupt(struct pt_regs *regs)
++void smp_local_timer_interrupt(void)
+ {
+- profile_tick(CPU_PROFILING, regs);
++ profile_tick(CPU_PROFILING);
+ #ifndef CONFIG_XEN
+ #ifdef CONFIG_SMP
+- update_process_times(user_mode(regs));
++ update_process_times(user_mode(get_irq_regs()));
+ #endif
+ #endif
+ /*
+ * We take the 'long' return path, and there every subsystem
+ * grabs the appropriate locks (kernel lock/ irq lock).
+ *
+- * we might want to decouple profiling from the 'long path',
++ * We might want to decouple profiling from the 'long path',
+ * and do the profiling totally in assembly.
+ *
+ * Currently this isn't too much of an issue (performance wise),
+@@ -92,6 +92,8 @@ void smp_local_timer_interrupt(struct pt
+ */
+ void smp_apic_timer_interrupt(struct pt_regs *regs)
+ {
++ struct pt_regs *old_regs = set_irq_regs(regs);
++
+ /*
+ * the NMI deadlock-detector uses this.
+ */
+@@ -109,8 +111,9 @@ void smp_apic_timer_interrupt(struct pt_
+ */
+ exit_idle();
+ irq_enter();
+- smp_local_timer_interrupt(regs);
++ smp_local_timer_interrupt();
+ irq_exit();
++ set_irq_regs(old_regs);
+ }
+
+ /*
+@@ -188,9 +191,8 @@ int disable_apic;
+ int __init APIC_init_uniprocessor (void)
+ {
+ #ifdef CONFIG_X86_IO_APIC
+- if (smp_found_config)
+- if (!skip_ioapic_setup && nr_ioapics)
+- setup_IO_APIC();
++ if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
++ setup_IO_APIC();
+ #endif
+
+ return 1;
+Index: head-2008-12-01/arch/x86/kernel/e820_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/e820_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/e820_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -16,6 +16,7 @@
+ #include <linux/string.h>
+ #include <linux/kexec.h>
+ #include <linux/module.h>
++#include <linux/mm.h>
+
+ #include <asm/pgtable.h>
+ #include <asm/page.h>
+@@ -25,6 +26,11 @@
+ #include <asm/sections.h>
+ #include <xen/interface/memory.h>
+
++struct e820map e820 __initdata;
++#ifdef CONFIG_XEN
++struct e820map machine_e820 __initdata;
++#endif
++
+ /*
+ * PFN of last memory page.
+ */
+@@ -41,14 +47,10 @@ unsigned long end_pfn_map;
+ /*
+ * Last pfn which the user wants to use.
+ */
+-unsigned long end_user_pfn = MAXMEM>>PAGE_SHIFT;
++static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
+
+ extern struct resource code_resource, data_resource;
+
+-#ifdef CONFIG_XEN
+-extern struct e820map machine_e820;
+-#endif
+-
+ /* Check for some hardcoded bad areas that early boot is not allowed to touch */
+ static inline int bad_addr(unsigned long *addrp, unsigned long size)
+ {
+@@ -57,13 +59,13 @@ static inline int bad_addr(unsigned long
+ #ifndef CONFIG_XEN
+ /* various gunk below that needed for SMP startup */
+ if (addr < 0x8000) {
+- *addrp = 0x8000;
++ *addrp = PAGE_ALIGN(0x8000);
+ return 1;
+ }
+
+ /* direct mapping tables of the kernel */
+ if (last >= table_start<<PAGE_SHIFT && addr < table_end<<PAGE_SHIFT) {
+- *addrp = table_end << PAGE_SHIFT;
++ *addrp = PAGE_ALIGN(table_end << PAGE_SHIFT);
+ return 1;
+ }
+
+@@ -71,23 +73,18 @@ static inline int bad_addr(unsigned long
+ #ifdef CONFIG_BLK_DEV_INITRD
+ if (LOADER_TYPE && INITRD_START && last >= INITRD_START &&
+ addr < INITRD_START+INITRD_SIZE) {
+- *addrp = INITRD_START + INITRD_SIZE;
++ *addrp = PAGE_ALIGN(INITRD_START + INITRD_SIZE);
+ return 1;
+ }
+ #endif
+- /* kernel code + 640k memory hole (later should not be needed, but
+- be paranoid for now) */
+- if (last >= 640*1024 && addr < 1024*1024) {
+- *addrp = 1024*1024;
+- return 1;
+- }
+- if (last >= __pa_symbol(&_text) && last < __pa_symbol(&_end)) {
+- *addrp = __pa_symbol(&_end);
++ /* kernel code */
++ if (last >= __pa_symbol(&_text) && addr < __pa_symbol(&_end)) {
++ *addrp = PAGE_ALIGN(__pa_symbol(&_end));
+ return 1;
+ }
+
+ if (last >= ebda_addr && addr < ebda_addr + ebda_size) {
+- *addrp = ebda_addr + ebda_size;
++ *addrp = PAGE_ALIGN(ebda_addr + ebda_size);
+ return 1;
+ }
+
+@@ -184,7 +181,7 @@ unsigned long __init find_e820_area(unsi
+ continue;
+ while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size)
+ ;
+- last = addr + size;
++ last = PAGE_ALIGN(addr) + size;
+ if (last > ei->addr + ei->size)
+ continue;
+ if (last > end)
+@@ -194,59 +191,14 @@ unsigned long __init find_e820_area(unsi
+ return -1UL;
+ }
+
+-/*
+- * Free bootmem based on the e820 table for a node.
+- */
+-void __init e820_bootmem_free(pg_data_t *pgdat, unsigned long start,unsigned long end)
+-{
+- int i;
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- unsigned long last, addr;
+-
+- if (ei->type != E820_RAM ||
+- ei->addr+ei->size <= start ||
+- ei->addr >= end)
+- continue;
+-
+- addr = round_up(ei->addr, PAGE_SIZE);
+- if (addr < start)
+- addr = start;
+-
+- last = round_down(ei->addr + ei->size, PAGE_SIZE);
+- if (last >= end)
+- last = end;
+-
+- if (last > addr && last-addr >= PAGE_SIZE)
+- free_bootmem_node(pgdat, addr, last-addr);
+- }
+-}
+-
+ /*
+ * Find the highest page frame number we have available
+ */
+ unsigned long __init e820_end_of_ram(void)
+ {
+- int i;
+ unsigned long end_pfn = 0;
++ end_pfn = find_max_pfn_with_active_regions();
+
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- unsigned long start, end;
+-
+- start = round_up(ei->addr, PAGE_SIZE);
+- end = round_down(ei->addr + ei->size, PAGE_SIZE);
+- if (start >= end)
+- continue;
+- if (ei->type == E820_RAM) {
+- if (end > end_pfn<<PAGE_SHIFT)
+- end_pfn = end>>PAGE_SHIFT;
+- } else {
+- if (end > end_pfn_map<<PAGE_SHIFT)
+- end_pfn_map = end>>PAGE_SHIFT;
+- }
+- }
+-
+ if (end_pfn > end_pfn_map)
+ end_pfn_map = end_pfn;
+ if (end_pfn_map > MAXMEM>>PAGE_SHIFT)
+@@ -256,43 +208,10 @@ unsigned long __init e820_end_of_ram(voi
+ if (end_pfn > end_pfn_map)
+ end_pfn = end_pfn_map;
+
++ printk("end_pfn_map = %lu\n", end_pfn_map);
+ return end_pfn;
+ }
+
+-/*
+- * Compute how much memory is missing in a range.
+- * Unlike the other functions in this file the arguments are in page numbers.
+- */
+-unsigned long __init
+-e820_hole_size(unsigned long start_pfn, unsigned long end_pfn)
+-{
+- unsigned long ram = 0;
+- unsigned long start = start_pfn << PAGE_SHIFT;
+- unsigned long end = end_pfn << PAGE_SHIFT;
+- int i;
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- unsigned long last, addr;
+-
+- if (ei->type != E820_RAM ||
+- ei->addr+ei->size <= start ||
+- ei->addr >= end)
+- continue;
+-
+- addr = round_up(ei->addr, PAGE_SIZE);
+- if (addr < start)
+- addr = start;
+-
+- last = round_down(ei->addr + ei->size, PAGE_SIZE);
+- if (last >= end)
+- last = end;
+-
+- if (last > addr)
+- ram += last - addr;
+- }
+- return ((end - start) - ram) >> PAGE_SHIFT;
+-}
+-
+ /*
+ * Mark e820 reserved areas as busy for the resource manager.
+ */
+@@ -333,6 +252,98 @@ void __init e820_reserve_resources(struc
+ }
+ }
+
++#ifndef CONFIG_XEN
++/* Mark pages corresponding to given address range as nosave */
++static void __init
++e820_mark_nosave_range(unsigned long start, unsigned long end)
++{
++ unsigned long pfn, max_pfn;
++
++ if (start >= end)
++ return;
++
++ printk("Nosave address range: %016lx - %016lx\n", start, end);
++ max_pfn = end >> PAGE_SHIFT;
++ for (pfn = start >> PAGE_SHIFT; pfn < max_pfn; pfn++)
++ if (pfn_valid(pfn))
++ SetPageNosave(pfn_to_page(pfn));
++}
++
++/*
++ * Find the ranges of physical addresses that do not correspond to
++ * e820 RAM areas and mark the corresponding pages as nosave for software
++ * suspend and suspend to RAM.
++ *
++ * This function requires the e820 map to be sorted and without any
++ * overlapping entries and assumes the first e820 area to be RAM.
++ */
++void __init e820_mark_nosave_regions(void)
++{
++ int i;
++ unsigned long paddr;
++
++ paddr = round_down(e820.map[0].addr + e820.map[0].size, PAGE_SIZE);
++ for (i = 1; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++
++ if (paddr < ei->addr)
++ e820_mark_nosave_range(paddr,
++ round_up(ei->addr, PAGE_SIZE));
++
++ paddr = round_down(ei->addr + ei->size, PAGE_SIZE);
++ if (ei->type != E820_RAM)
++ e820_mark_nosave_range(round_up(ei->addr, PAGE_SIZE),
++ paddr);
++
++ if (paddr >= (end_pfn << PAGE_SHIFT))
++ break;
++ }
++}
++#endif
++
++/* Walk the e820 map and register active regions within a node */
++void __init
++e820_register_active_regions(int nid, unsigned long start_pfn,
++ unsigned long end_pfn)
++{
++ int i;
++ unsigned long ei_startpfn, ei_endpfn;
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ ei_startpfn = round_up(ei->addr, PAGE_SIZE) >> PAGE_SHIFT;
++ ei_endpfn = round_down(ei->addr + ei->size, PAGE_SIZE)
++ >> PAGE_SHIFT;
++
++ /* Skip map entries smaller than a page */
++ if (ei_startpfn >= ei_endpfn)
++ continue;
++
++ /* Check if end_pfn_map should be updated */
++ if (ei->type != E820_RAM && ei_endpfn > end_pfn_map)
++ end_pfn_map = ei_endpfn;
++
++ /* Skip if map is outside the node */
++ if (ei->type != E820_RAM ||
++ ei_endpfn <= start_pfn ||
++ ei_startpfn >= end_pfn)
++ continue;
++
++ /* Check for overlaps */
++ if (ei_startpfn < start_pfn)
++ ei_startpfn = start_pfn;
++ if (ei_endpfn > end_pfn)
++ ei_endpfn = end_pfn;
++
++ /* Obey end_user_pfn to save on memmap */
++ if (ei_startpfn >= end_user_pfn)
++ continue;
++ if (ei_endpfn > end_user_pfn)
++ ei_endpfn = end_user_pfn;
++
++ add_active_range(nid, ei_startpfn, ei_endpfn);
++ }
++}
++
+ /*
+ * Add a memory region to the kernel e820 map.
+ */
+@@ -553,13 +564,6 @@ static int __init sanitize_e820_map(stru
+ * If we're lucky and live on a modern system, the setup code
+ * will have given us a memory map that we can use to properly
+ * set up memory. If we aren't, we'll fake a memory map.
+- *
+- * We check to see that the memory map contains at least 2 elements
+- * before we'll use it, because the detection code in setup.S may
+- * not be perfect and most every PC known to man has two memory
+- * regions: one from 0 to 640k, and one from 1mb up. (The IBM
+- * thinkpad 560x, for example, does not cooperate with the memory
+- * detection code.)
+ */
+ static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
+ {
+@@ -581,27 +585,6 @@ static int __init copy_e820_map(struct e
+ if (start > end)
+ return -1;
+
+-#ifndef CONFIG_XEN
+- /*
+- * Some BIOSes claim RAM in the 640k - 1M region.
+- * Not right. Fix it up.
+- *
+- * This should be removed on Hammer which is supposed to not
+- * have non e820 covered ISA mappings there, but I had some strange
+- * problems so it stays for now. -AK
+- */
+- if (type == E820_RAM) {
+- if (start < 0x100000ULL && end > 0xA0000ULL) {
+- if (start < 0xA0000ULL)
+- add_memory_region(start, 0xA0000ULL-start, type);
+- if (end <= 0x100000ULL)
+- continue;
+- start = 0x100000ULL;
+- size = end - start;
+- }
+- }
+-#endif
+-
+ add_memory_region(start, size, type);
+ } while (biosmap++,--nr_map);
+
+@@ -622,11 +605,15 @@ static int __init copy_e820_map(struct e
+ return 0;
+ }
+
++void early_panic(char *msg)
++{
++ early_printk(msg);
++ panic(msg);
++}
++
+ #ifndef CONFIG_XEN
+ void __init setup_memory_region(void)
+ {
+- char *who = "BIOS-e820";
+-
+ /*
+ * Try to copy the BIOS-supplied E820-map.
+ *
+@@ -634,24 +621,10 @@ void __init setup_memory_region(void)
+ * the next section from 1mb->appropriate_mem_k
+ */
+ sanitize_e820_map(E820_MAP, &E820_MAP_NR);
+- if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
+- unsigned long mem_size;
+-
+- /* compare results from other methods and take the greater */
+- if (ALT_MEM_K < EXT_MEM_K) {
+- mem_size = EXT_MEM_K;
+- who = "BIOS-88";
+- } else {
+- mem_size = ALT_MEM_K;
+- who = "BIOS-e801";
+- }
+-
+- e820.nr_map = 0;
+- add_memory_region(0, LOWMEMSIZE(), E820_RAM);
+- add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
+- }
++ if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0)
++ early_panic("Cannot find a valid memory map");
+ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+- e820_print_map(who);
++ e820_print_map("BIOS-e820");
+ }
+
+ #else /* CONFIG_XEN */
+@@ -683,20 +656,23 @@ void __init setup_memory_region(void)
+
+ sanitize_e820_map(map, (char *)&memmap.nr_entries);
+
+- BUG_ON(copy_e820_map(map, (char)memmap.nr_entries) < 0);
++ if (copy_e820_map(map, (char)memmap.nr_entries) < 0)
++ early_panic("Cannot find a valid memory map");
+
+ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+ e820_print_map("Xen");
+ }
+ #endif
+
+-void __init parse_memopt(char *p, char **from)
+-{
++static int __init parse_memopt(char *p)
++{
+ int i;
+ unsigned long current_end;
+ unsigned long end;
+
+- end_user_pfn = memparse(p, from);
++ if (!p)
++ return -EINVAL;
++ end_user_pfn = memparse(p, &p);
+ end_user_pfn >>= PAGE_SHIFT;
+
+ end = end_user_pfn<<PAGE_SHIFT;
+@@ -713,27 +689,61 @@ void __init parse_memopt(char *p, char *
+ else
+ add_memory_region(current_end, end - current_end, E820_RAM);
+ }
++
++ return 0;
+ }
++early_param("mem", parse_memopt);
++
++static int userdef __initdata;
+
+-void __init parse_memmapopt(char *p, char **from)
++static int __init parse_memmap_opt(char *p)
+ {
++ char *oldp;
+ unsigned long long start_at, mem_size;
+
+- mem_size = memparse(p, from);
+- p = *from;
++ if (!strcmp(p, "exactmap")) {
++#ifdef CONFIG_CRASH_DUMP
++ /* If we are doing a crash dump, we
++ * still need to know the real mem
++ * size before original memory map is
++ * reset.
++ */
++ e820_register_active_regions(0, 0, -1UL);
++ saved_max_pfn = e820_end_of_ram();
++ remove_all_active_ranges();
++#endif
++ end_pfn_map = 0;
++ e820.nr_map = 0;
++ userdef = 1;
++ return 0;
++ }
++
++ oldp = p;
++ mem_size = memparse(p, &p);
++ if (p == oldp)
++ return -EINVAL;
+ if (*p == '@') {
+- start_at = memparse(p+1, from);
++ start_at = memparse(p+1, &p);
+ add_memory_region(start_at, mem_size, E820_RAM);
+ } else if (*p == '#') {
+- start_at = memparse(p+1, from);
++ start_at = memparse(p+1, &p);
+ add_memory_region(start_at, mem_size, E820_ACPI);
+ } else if (*p == '$') {
+- start_at = memparse(p+1, from);
++ start_at = memparse(p+1, &p);
+ add_memory_region(start_at, mem_size, E820_RESERVED);
+ } else {
+ end_user_pfn = (mem_size >> PAGE_SHIFT);
+ }
+- p = *from;
++ return *p == '\0' ? 0 : -EINVAL;
++}
++early_param("memmap", parse_memmap_opt);
++
++void finish_e820_parsing(void)
++{
++ if (userdef) {
++ printk(KERN_INFO "user-defined physical RAM map:\n");
++ e820_print_map("user");
++ }
+ }
+
+ unsigned long pci_mem_start = 0xaeedbabe;
+Index: head-2008-12-01/arch/x86/kernel/early_printk-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/early_printk-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/early_printk-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -244,20 +244,16 @@ void early_printk(const char *fmt, ...)
+
+ static int __initdata keep_early;
+
+-int __init setup_early_printk(char *opt)
++static int __init setup_early_printk(char *buf)
+ {
+- char *space;
+- char buf[256];
++ if (!buf)
++ return 0;
+
+ if (early_console_initialized)
+- return 1;
+-
+- strlcpy(buf,opt,sizeof(buf));
+- space = strchr(buf, ' ');
+- if (space)
+- *space = 0;
++ return 0;
++ early_console_initialized = 1;
+
+- if (strstr(buf,"keep"))
++ if (strstr(buf, "keep"))
+ keep_early = 1;
+
+ if (!strncmp(buf, "serial", 6)) {
+@@ -281,11 +277,12 @@ int __init setup_early_printk(char *opt)
+ early_console = &simnow_console;
+ keep_early = 1;
+ }
+- early_console_initialized = 1;
+ register_console(early_console);
+ return 0;
+ }
+
++early_param("earlyprintk", setup_early_printk);
++
+ void __init disable_early_printk(void)
+ {
+ if (!early_console_initialized || !early_console)
+@@ -299,4 +296,3 @@ void __init disable_early_printk(void)
+ }
+ }
+
+-__setup("earlyprintk=", setup_early_printk);
+Index: head-2008-12-01/arch/x86/kernel/entry_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_64-xen.S 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:29:05.000000000 +0100
+@@ -4,9 +4,6 @@
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen SuSE Labs
+ * Copyright (C) 2000 Pavel Machek <pavel@suse.cz>
+- *
+- * $Id$
+- *
+ * Jun Nakajima <jun.nakajima@intel.com>
+ * Asit Mallick <asit.k.mallick@intel.com>
+ * Modified for Xen
+@@ -26,15 +23,25 @@
+ * at the top of the kernel process stack.
+ * - partial stack frame: partially saved registers upto R11.
+ * - full stack frame: Like partial stack frame, but all register saved.
+- *
+- * TODO:
+- * - schedule it carefully for the final hardware.
++ *
++ * Some macro usage:
++ * - CFI macros are used to generate dwarf2 unwind information for better
++ * backtraces. They don't change any code.
++ * - SAVE_ALL/RESTORE_ALL - Save/restore all registers
++ * - SAVE_ARGS/RESTORE_ARGS - Save/restore registers that C functions modify.
++ * There are unfortunately lots of special cases where some registers
++ * not touched. The macro is a big mess that should be cleaned up.
++ * - SAVE_REST/RESTORE_REST - Handle the registers not saved by SAVE_ARGS.
++ * Gives a full stack frame.
++ * - ENTRY/END Define functions in the symbol table.
++ * - FIXUP_TOP_OF_STACK/RESTORE_TOP_OF_STACK - Fix up the hardware stack
++ * frame that is otherwise undefined after a SYSCALL
++ * - TRACE_IRQ_* - Trace hard interrupt state for lock debugging.
++ * - errorentry/paranoidentry/zeroentry - Define exception entry points.
+ */
+
+-#define ASSEMBLY 1
+ #include <linux/linkage.h>
+ #include <asm/segment.h>
+-#include <asm/smp.h>
+ #include <asm/cache.h>
+ #include <asm/errno.h>
+ #include <asm/dwarf2.h>
+@@ -117,6 +124,7 @@ NMI_MASK = 0x80000000
+ .macro CFI_DEFAULT_STACK start=1,adj=0
+ .if \start
+ CFI_STARTPROC simple
++ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8 - \adj*ARGOFFSET
+ .else
+ CFI_DEF_CFA_OFFSET SS+8 - \adj*ARGOFFSET
+@@ -207,6 +215,7 @@ END(ret_from_fork)
+ */
+ .macro _frame ref
+ CFI_STARTPROC simple
++ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-\ref
+ /*CFI_REL_OFFSET ss,SS-\ref*/
+ CFI_REL_OFFSET rsp,RSP-\ref
+@@ -334,6 +343,8 @@ tracesys:
+ LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
+ cmpq $__NR_syscall_max,%rax
++ movq $-ENOSYS,%rcx
++ cmova %rcx,%rax
+ ja 1f
+ movq %r10,%rcx /* fixup for C */
+ call *sys_call_table(,%rax,8)
+@@ -349,6 +360,7 @@ END(system_call)
+ */
+ ENTRY(int_ret_from_sys_call)
+ CFI_STARTPROC simple
++ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-ARGOFFSET
+ /*CFI_REL_OFFSET ss,SS-ARGOFFSET*/
+ CFI_REL_OFFSET rsp,RSP-ARGOFFSET
+@@ -583,8 +595,7 @@ retint_signal:
+ #ifdef CONFIG_PREEMPT
+ /* Returning to kernel space. Check if we need preemption */
+ /* rcx: threadinfo. interrupts off. */
+- .p2align
+-retint_kernel:
++ENTRY(retint_kernel)
+ cmpl $0,threadinfo_preempt_count(%rcx)
+ jnz retint_restore_args
+ bt $TIF_NEED_RESCHED,threadinfo_flags(%rcx)
+@@ -644,7 +655,6 @@ ENTRY(call_function_interrupt)
+ END(call_function_interrupt)
+ #endif
+
+-#ifdef CONFIG_X86_LOCAL_APIC
+ ENTRY(apic_timer_interrupt)
+ apicinterrupt LOCAL_TIMER_VECTOR,smp_apic_timer_interrupt
+ END(apic_timer_interrupt)
+@@ -656,7 +666,6 @@ END(error_interrupt)
+ ENTRY(spurious_interrupt)
+ apicinterrupt SPURIOUS_APIC_VECTOR,smp_spurious_interrupt
+ END(spurious_interrupt)
+-#endif
+ #endif /* !CONFIG_XEN */
+
+ /*
+@@ -755,7 +764,9 @@ paranoid_exit\trace:
+ testl $3,CS(%rsp)
+ jnz paranoid_userspace\trace
+ paranoid_swapgs\trace:
++ .if \trace
+ TRACE_IRQS_IRETQ 0
++ .endif
+ swapgs
+ paranoid_restore\trace:
+ RESTORE_ALL 8
+@@ -802,7 +813,7 @@ paranoid_schedule\trace:
+ * Exception entry point. This expects an error code/orig_rax on the stack
+ * and the exception handler in %rax.
+ */
+-ENTRY(error_entry)
++KPROBE_ENTRY(error_entry)
+ _frame RDI
+ CFI_REL_OFFSET rax,0
+ /* rdi slot contains rax, oldrax contains error code */
+@@ -896,7 +907,7 @@ error_kernelspace:
+ jmp error_sti
+ #endif
+ CFI_ENDPROC
+-END(error_entry)
++KPROBE_END(error_entry)
+
+ ENTRY(hypervisor_callback)
+ zeroentry do_hypervisor_callback
+@@ -936,26 +947,6 @@ ENTRY(do_hypervisor_callback) # do_hyp
+ CFI_ENDPROC
+ END(do_hypervisor_callback)
+
+-#ifdef CONFIG_X86_LOCAL_APIC
+-KPROBE_ENTRY(nmi)
+- zeroentry do_nmi_callback
+-ENTRY(do_nmi_callback)
+- CFI_STARTPROC
+- addq $8, %rsp
+- CFI_ENDPROC
+- CFI_DEFAULT_STACK
+- call do_nmi
+- orl $NMI_MASK,EFLAGS(%rsp)
+- RESTORE_REST
+- XEN_BLOCK_EVENTS(%rsi)
+- TRACE_IRQS_OFF
+- GET_THREAD_INFO(%rcx)
+- jmp retint_restore_args
+- CFI_ENDPROC
+- .previous .text
+-END(nmi)
+-#endif
+-
+ ALIGN
+ restore_all_enable_events:
+ CFI_DEFAULT_STACK adj=1
+@@ -1121,7 +1112,7 @@ ENDPROC(child_rip)
+ * do_sys_execve asm fallback arguments:
+ * rdi: name, rsi: argv, rdx: envp, fake frame on the stack
+ */
+-ENTRY(execve)
++ENTRY(kernel_execve)
+ CFI_STARTPROC
+ FAKE_STACK_FRAME $0
+ SAVE_ALL
+@@ -1135,12 +1126,11 @@ ENTRY(execve)
+ UNFAKE_STACK_FRAME
+ ret
+ CFI_ENDPROC
+-ENDPROC(execve)
++ENDPROC(kernel_execve)
+
+ KPROBE_ENTRY(page_fault)
+ errorentry do_page_fault
+-END(page_fault)
+- .previous .text
++KPROBE_END(page_fault)
+
+ ENTRY(coprocessor_error)
+ zeroentry do_coprocessor_error
+@@ -1162,25 +1152,25 @@ KPROBE_ENTRY(debug)
+ zeroentry do_debug
+ /* paranoidexit
+ CFI_ENDPROC */
+-END(debug)
+- .previous .text
++KPROBE_END(debug)
+
+-#if 0
+- /* runs on exception stack */
+ KPROBE_ENTRY(nmi)
+- INTR_FRAME
+- pushq $-1
+- CFI_ADJUST_CFA_OFFSET 8
+- paranoidentry do_nmi, 0, 0
+-#ifdef CONFIG_TRACE_IRQFLAGS
+- paranoidexit 0
+-#else
+- jmp paranoid_exit1
+- CFI_ENDPROC
+-#endif
+-END(nmi)
+- .previous .text
+-#endif
++ zeroentry do_nmi_callback
++KPROBE_END(nmi)
++do_nmi_callback:
++ CFI_STARTPROC
++ addq $8, %rsp
++ CFI_ENDPROC
++ CFI_DEFAULT_STACK
++ call do_nmi
++ orl $NMI_MASK,EFLAGS(%rsp)
++ RESTORE_REST
++ XEN_BLOCK_EVENTS(%rsi)
++ TRACE_IRQS_OFF
++ GET_THREAD_INFO(%rcx)
++ jmp retint_restore_args
++ CFI_ENDPROC
++END(do_nmi_callback)
+
+ KPROBE_ENTRY(int3)
+ /* INTR_FRAME
+@@ -1189,8 +1179,7 @@ KPROBE_ENTRY(int3)
+ zeroentry do_int3
+ /* jmp paranoid_exit1
+ CFI_ENDPROC */
+-END(int3)
+- .previous .text
++KPROBE_END(int3)
+
+ ENTRY(overflow)
+ zeroentry do_overflow
+@@ -1241,8 +1230,7 @@ END(stack_segment)
+
+ KPROBE_ENTRY(general_protection)
+ errorentry do_general_protection
+-END(general_protection)
+- .previous .text
++KPROBE_END(general_protection)
+
+ ENTRY(alignment_check)
+ errorentry do_alignment_check
+Index: head-2008-12-01/arch/x86/kernel/genapic_xen_64.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/genapic_xen_64.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/genapic_xen_64.c 2008-12-01 11:29:05.000000000 +0100
+@@ -71,6 +71,13 @@ static cpumask_t xen_target_cpus(void)
+ return cpu_online_map;
+ }
+
++static cpumask_t xen_vector_allocation_domain(int cpu)
++{
++ cpumask_t domain = CPU_MASK_NONE;
++ cpu_set(cpu, domain);
++ return domain;
++}
++
+ /*
+ * Set up the logical destination ID.
+ * Do nothing, not called now.
+@@ -147,8 +154,8 @@ struct genapic apic_xen = {
+ .int_delivery_mode = dest_LowestPrio,
+ #endif
+ .int_dest_mode = (APIC_DEST_LOGICAL != 0),
+- .int_delivery_dest = APIC_DEST_LOGICAL | APIC_DM_LOWEST,
+ .target_cpus = xen_target_cpus,
++ .vector_allocation_domain = xen_vector_allocation_domain,
+ #ifdef CONFIG_XEN_PRIVILEGED_GUEST
+ .apic_id_registered = xen_apic_id_registered,
+ #endif
+Index: head-2008-12-01/arch/x86/kernel/head_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head_64-xen.S 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head_64-xen.S 2008-12-01 11:29:05.000000000 +0100
+@@ -5,9 +5,6 @@
+ * Copyright (C) 2000 Pavel Machek <pavel@suse.cz>
+ * Copyright (C) 2000 Karsten Keil <kkeil@suse.de>
+ * Copyright (C) 2001,2002 Andi Kleen <ak@suse.de>
+- *
+- * $Id: head.S,v 1.49 2002/03/19 17:39:25 ak Exp $
+- *
+ * Jun Nakajima <jun.nakajima@intel.com>
+ * Modified for Xen
+ */
+@@ -149,7 +146,7 @@ ENTRY(cpu_gdt_table)
+ .quad 0,0 /* TSS */
+ .quad 0,0 /* LDT */
+ .quad 0,0,0 /* three TLS descriptors */
+- .quad 0 /* unused */
++ .quad 0x0000f40000000000 /* node/CPU stored in limit */
+ gdt_end:
+ /* asm/segment.h:GDT_ENTRIES must match this */
+ /* This should be a multiple of the cache line size */
+Index: head-2008-12-01/arch/x86/kernel/head64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -7,6 +7,9 @@
+ * Modified for Xen.
+ */
+
++/* PDA is not ready to be used until the end of x86_64_start_kernel(). */
++#define arch_use_lazy_mmu_mode() false
++
+ #include <linux/init.h>
+ #include <linux/linkage.h>
+ #include <linux/types.h>
+@@ -54,11 +57,9 @@ static void __init copy_bootdata(char *r
+ new_data = *(int *) (x86_boot_params + NEW_CL_POINTER);
+ if (!new_data) {
+ if (OLD_CL_MAGIC != * (u16 *) OLD_CL_MAGIC_ADDR) {
+- printk("so old bootloader that it does not support commandline?!\n");
+ return;
+ }
+ new_data = OLD_CL_BASE_ADDR + * (u16 *) OLD_CL_OFFSET;
+- printk("old bootloader convention, maybe loadlin?\n");
+ }
+ command_line = (char *) ((u64)(new_data));
+ memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
+@@ -70,25 +71,6 @@ static void __init copy_bootdata(char *r
+ memcpy(saved_command_line, xen_start_info->cmd_line, max_cmdline);
+ saved_command_line[max_cmdline-1] = '\0';
+ #endif
+- printk("Bootdata ok (command line is %s)\n", saved_command_line);
+-}
+-
+-static void __init setup_boot_cpu_data(void)
+-{
+- unsigned int dummy, eax;
+-
+- /* get vendor info */
+- cpuid(0, (unsigned int *)&boot_cpu_data.cpuid_level,
+- (unsigned int *)&boot_cpu_data.x86_vendor_id[0],
+- (unsigned int *)&boot_cpu_data.x86_vendor_id[8],
+- (unsigned int *)&boot_cpu_data.x86_vendor_id[4]);
+-
+- /* get cpu type */
+- cpuid(1, &eax, &dummy, &dummy,
+- (unsigned int *) &boot_cpu_data.x86_capability);
+- boot_cpu_data.x86 = (eax >> 8) & 0xf;
+- boot_cpu_data.x86_model = (eax >> 4) & 0xf;
+- boot_cpu_data.x86_mask = eax & 0xf;
+ }
+
+ #include <xen/interface/memory.h>
+@@ -101,7 +83,6 @@ void __init x86_64_start_kernel(char * r
+ {
+ struct xen_machphys_mapping mapping;
+ unsigned long machine_to_phys_nr_ents;
+- char *s;
+ int i;
+
+ setup_xen_features();
+@@ -128,10 +109,7 @@ void __init x86_64_start_kernel(char * r
+ asm volatile("lidt %0" :: "m" (idt_descr));
+ #endif
+
+- /*
+- * This must be called really, really early:
+- */
+- lockdep_init();
++ early_printk("Kernel alive\n");
+
+ for (i = 0; i < NR_CPUS; i++)
+ cpu_pda(i) = &boot_cpu_pda[i];
+@@ -141,22 +119,5 @@ void __init x86_64_start_kernel(char * r
+ #ifdef CONFIG_SMP
+ cpu_set(0, cpu_online_map);
+ #endif
+- s = strstr(saved_command_line, "earlyprintk=");
+- if (s != NULL)
+- setup_early_printk(strchr(s, '=') + 1);
+-#ifdef CONFIG_NUMA
+- s = strstr(saved_command_line, "numa=");
+- if (s != NULL)
+- numa_setup(s+5);
+-#endif
+-#ifdef CONFIG_X86_IO_APIC
+- if (strstr(saved_command_line, "disableapic"))
+- disable_apic = 1;
+-#endif
+- /* You need early console to see that */
+- if (__pa_symbol(&_end) >= KERNEL_TEXT_SIZE)
+- panic("Kernel too big for kernel mapping\n");
+-
+- setup_boot_cpu_data();
+ start_kernel();
+ }
+Index: head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -26,9 +26,12 @@
+ #include <linux/delay.h>
+ #include <linux/sched.h>
+ #include <linux/smp_lock.h>
++#include <linux/pci.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/acpi.h>
+ #include <linux/sysdev.h>
++#include <linux/msi.h>
++#include <linux/htirq.h>
+ #ifdef CONFIG_ACPI
+ #include <acpi/acpi_bus.h>
+ #endif
+@@ -41,6 +44,10 @@
+ #include <asm/acpi.h>
+ #include <asm/dma.h>
+ #include <asm/nmi.h>
++#include <asm/msidef.h>
++#include <asm/hypertransport.h>
++
++static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result);
+
+ #define __apicdebuginit __init
+
+@@ -48,17 +55,30 @@ int sis_apic_bug; /* not actually suppor
+
+ static int no_timer_check;
+
+-int disable_timer_pin_1 __initdata;
++static int disable_timer_pin_1 __initdata;
+
+-#ifndef CONFIG_XEN
+-int timer_over_8254 __initdata = 0;
++#ifdef CONFIG_XEN
++#include <xen/interface/xen.h>
++#include <xen/interface/physdev.h>
++#include <xen/evtchn.h>
++
++/* Fake i8259 */
++#define make_8259A_irq(_irq) (io_apic_irqs &= ~(1UL<<(_irq)))
++#define disable_8259A_irq(_irq) ((void)0)
++#define i8259A_irq_pending(_irq) (0)
++
++unsigned long io_apic_irqs;
++
++#define clear_IO_APIC() ((void)0)
++#else
++int timer_over_8254 __initdata = 1;
+
+ /* Where if anywhere is the i8259 connect in external int mode */
+ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
+ #endif
+
+ static DEFINE_SPINLOCK(ioapic_lock);
+-static DEFINE_SPINLOCK(vector_lock);
++DEFINE_SPINLOCK(vector_lock);
+
+ /*
+ * # of IRQ routing registers
+@@ -83,29 +103,27 @@ static struct irq_pin_list {
+ short apic, pin, next;
+ } irq_2_pin[PIN_MAP_SIZE];
+
+-int vector_irq[NR_VECTORS] __read_mostly = { [0 ... NR_VECTORS - 1] = -1};
+-#ifdef CONFIG_PCI_MSI
+-#define vector_to_irq(vector) \
+- (platform_legacy_irq(vector) ? vector : vector_irq[vector])
+-#else
+-#define vector_to_irq(vector) (vector)
+-#endif
+-
+-#ifdef CONFIG_XEN
+-
+-#include <xen/interface/xen.h>
+-#include <xen/interface/physdev.h>
+-#include <xen/evtchn.h>
+-
+-/* Fake i8259 */
+-#define make_8259A_irq(_irq) (io_apic_irqs &= ~(1UL<<(_irq)))
+-#define disable_8259A_irq(_irq) ((void)0)
+-#define i8259A_irq_pending(_irq) (0)
++#ifndef CONFIG_XEN
++struct io_apic {
++ unsigned int index;
++ unsigned int unused[3];
++ unsigned int data;
++};
+
+-unsigned long io_apic_irqs;
++static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx)
++{
++ return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx)
++ + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK);
++}
++#endif
+
+-static inline unsigned int xen_io_apic_read(unsigned int apic, unsigned int reg)
++static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
+ {
++#ifndef CONFIG_XEN
++ struct io_apic __iomem *io_apic = io_apic_base(apic);
++ writel(reg, &io_apic->index);
++ return readl(&io_apic->data);
++#else
+ struct physdev_apic apic_op;
+ int ret;
+
+@@ -115,31 +133,133 @@ static inline unsigned int xen_io_apic_r
+ if (ret)
+ return ret;
+ return apic_op.value;
++#endif
+ }
+
+-static inline void xen_io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
++static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
+ {
++#ifndef CONFIG_XEN
++ struct io_apic __iomem *io_apic = io_apic_base(apic);
++ writel(reg, &io_apic->index);
++ writel(value, &io_apic->data);
++#else
+ struct physdev_apic apic_op;
+
+ apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
+ apic_op.reg = reg;
+ apic_op.value = value;
+ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op));
++#endif
++}
++
++#ifndef CONFIG_XEN
++/*
++ * Re-write a value: to be used for read-modify-write
++ * cycles where the read already set up the index register.
++ */
++static inline void io_apic_modify(unsigned int apic, unsigned int value)
++{
++ struct io_apic __iomem *io_apic = io_apic_base(apic);
++ writel(value, &io_apic->data);
+ }
++#else
++#define io_apic_modify io_apic_write
++#endif
+
+-#define io_apic_read(a,r) xen_io_apic_read(a,r)
+-#define io_apic_write(a,r,v) xen_io_apic_write(a,r,v)
++/*
++ * Synchronize the IO-APIC and the CPU by doing
++ * a dummy read from the IO-APIC
++ */
++static inline void io_apic_sync(unsigned int apic)
++{
++#ifndef CONFIG_XEN
++ struct io_apic __iomem *io_apic = io_apic_base(apic);
++ readl(&io_apic->data);
++#endif
++}
+
+-#define clear_IO_APIC() ((void)0)
++union entry_union {
++ struct { u32 w1, w2; };
++ struct IO_APIC_route_entry entry;
++};
+
+-#else
++#ifndef CONFIG_XEN
++static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin)
++{
++ union entry_union eu;
++ unsigned long flags;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ eu.w1 = io_apic_read(apic, 0x10 + 2 * pin);
++ eu.w2 = io_apic_read(apic, 0x11 + 2 * pin);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ return eu.entry;
++}
++#endif
++
++/*
++ * When we write a new IO APIC routing entry, we need to write the high
++ * word first! If the mask bit in the low word is clear, we will enable
++ * the interrupt, and we need to make sure the entry is fully populated
++ * before that happens.
++ */
++static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
++{
++ unsigned long flags;
++ union entry_union eu;
++ eu.entry = e;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x11 + 2*pin, eu.w2);
++ io_apic_write(apic, 0x10 + 2*pin, eu.w1);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
++
++#ifndef CONFIG_XEN
++/*
++ * When we mask an IO APIC routing entry, we need to write the low
++ * word first, in order to set the mask bit before we change the
++ * high bits!
++ */
++static void ioapic_mask_entry(int apic, int pin)
++{
++ unsigned long flags;
++ union entry_union eu = { .entry.mask = 1 };
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ io_apic_write(apic, 0x10 + 2*pin, eu.w1);
++ io_apic_write(apic, 0x11 + 2*pin, eu.w2);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++}
+
+ #ifdef CONFIG_SMP
++static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, u8 vector)
++{
++ int apic, pin;
++ struct irq_pin_list *entry = irq_2_pin + irq;
++
++ BUG_ON(irq >= NR_IRQS);
++ for (;;) {
++ unsigned int reg;
++ apic = entry->apic;
++ pin = entry->pin;
++ if (pin == -1)
++ break;
++ io_apic_write(apic, 0x11 + pin*2, dest);
++ reg = io_apic_read(apic, 0x10 + pin*2);
++ reg &= ~0x000000ff;
++ reg |= vector;
++ io_apic_modify(apic, reg);
++ if (!entry->next)
++ break;
++ entry = irq_2_pin + entry->next;
++ }
++}
++
+ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
+ {
+ unsigned long flags;
+ unsigned int dest;
+ cpumask_t tmp;
++ int vector;
+
+ cpus_and(tmp, mask, cpu_online_map);
+ if (cpus_empty(tmp))
+@@ -147,7 +267,11 @@ static void set_ioapic_affinity_irq(unsi
+
+ cpus_and(mask, tmp, CPU_MASK_ALL);
+
+- dest = cpu_mask_to_apicid(mask);
++ vector = assign_irq_vector(irq, mask, &tmp);
++ if (vector < 0)
++ return;
++
++ dest = cpu_mask_to_apicid(tmp);
+
+ /*
+ * Only the high 8 bits are valid.
+@@ -155,13 +279,12 @@ static void set_ioapic_affinity_irq(unsi
+ dest = SET_APIC_LOGICAL_ID(dest);
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+- __DO_ACTION(1, = dest, )
+- set_irq_info(irq, mask);
++ __target_IO_APIC_irq(irq, dest, vector);
++ set_native_irq_info(irq, mask);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+ #endif
+-
+-#endif /* !CONFIG_XEN */
++#endif
+
+ /*
+ * The common case is 1:1 IRQ<->pin mappings. Sometimes there are
+@@ -241,24 +364,15 @@ static void unmask_IO_APIC_irq (unsigned
+ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
+ {
+ struct IO_APIC_route_entry entry;
+- unsigned long flags;
+
+ /* Check delivery_mode to be sure we're not clearing an SMI pin */
+- spin_lock_irqsave(&ioapic_lock, flags);
+- *(((int*)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
+- *(((int*)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ entry = ioapic_read_entry(apic, pin);
+ if (entry.delivery_mode == dest_SMI)
+ return;
+ /*
+ * Disable it in the IO-APIC irq-routing table:
+ */
+- memset(&entry, 0, sizeof(entry));
+- entry.mask = 1;
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry) + 0));
+- io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry) + 1));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_mask_entry(apic, pin);
+ }
+
+ static void clear_IO_APIC (void)
+@@ -272,16 +386,6 @@ static void clear_IO_APIC (void)
+
+ #endif /* !CONFIG_XEN */
+
+-static u8 gsi_2_irq[NR_IRQ_VECTORS] = { [0 ... NR_IRQ_VECTORS-1] = 0xFF };
+-
+-/*
+- * support for broken MP BIOSs, enables hand-redirection of PIRQ0-7 to
+- * specific CPU-side IRQs.
+- */
+-
+-#define MAX_PIRQS 8
+-static int pirq_entries [MAX_PIRQS];
+-static int pirqs_enabled;
+ int skip_ioapic_setup;
+ int ioapic_force;
+
+@@ -290,18 +394,17 @@ int ioapic_force;
+ static int __init disable_ioapic_setup(char *str)
+ {
+ skip_ioapic_setup = 1;
+- return 1;
++ return 0;
+ }
++early_param("noapic", disable_ioapic_setup);
+
+-static int __init enable_ioapic_setup(char *str)
++/* Actually the next is obsolete, but keep it for paranoid reasons -AK */
++static int __init disable_timer_pin_setup(char *arg)
+ {
+- ioapic_force = 1;
+- skip_ioapic_setup = 0;
++ disable_timer_pin_1 = 1;
+ return 1;
+ }
+-
+-__setup("noapic", disable_ioapic_setup);
+-__setup("apic", enable_ioapic_setup);
++__setup("disable_timer_pin_1", disable_timer_pin_setup);
+
+ #ifndef CONFIG_XEN
+ static int __init setup_disable_8254_timer(char *s)
+@@ -319,137 +422,6 @@ __setup("disable_8254_timer", setup_disa
+ __setup("enable_8254_timer", setup_enable_8254_timer);
+ #endif /* !CONFIG_XEN */
+
+-#include <asm/pci-direct.h>
+-#include <linux/pci_ids.h>
+-#include <linux/pci.h>
+-
+-
+-#ifdef CONFIG_ACPI
+-
+-static int nvidia_hpet_detected __initdata;
+-
+-static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
+-{
+- nvidia_hpet_detected = 1;
+- return 0;
+-}
+-#endif
+-
+-/* Temporary Hack. Nvidia and VIA boards currently only work with IO-APIC
+- off. Check for an Nvidia or VIA PCI bridge and turn it off.
+- Use pci direct infrastructure because this runs before the PCI subsystem.
+-
+- Can be overwritten with "apic"
+-
+- And another hack to disable the IOMMU on VIA chipsets.
+-
+- ... and others. Really should move this somewhere else.
+-
+- Kludge-O-Rama. */
+-void __init check_ioapic(void)
+-{
+- int num,slot,func;
+- /* Poor man's PCI discovery */
+- for (num = 0; num < 32; num++) {
+- for (slot = 0; slot < 32; slot++) {
+- for (func = 0; func < 8; func++) {
+- u32 class;
+- u32 vendor;
+- u8 type;
+- class = read_pci_config(num,slot,func,
+- PCI_CLASS_REVISION);
+- if (class == 0xffffffff)
+- break;
+-
+- if ((class >> 16) != PCI_CLASS_BRIDGE_PCI)
+- continue;
+-
+- vendor = read_pci_config(num, slot, func,
+- PCI_VENDOR_ID);
+- vendor &= 0xffff;
+- switch (vendor) {
+- case PCI_VENDOR_ID_VIA:
+-#ifdef CONFIG_IOMMU
+- if ((end_pfn > MAX_DMA32_PFN ||
+- force_iommu) &&
+- !iommu_aperture_allowed) {
+- printk(KERN_INFO
+- "Looks like a VIA chipset. Disabling IOMMU. Override with \"iommu=allowed\"\n");
+- iommu_aperture_disabled = 1;
+- }
+-#endif
+- return;
+- case PCI_VENDOR_ID_NVIDIA:
+-#ifdef CONFIG_ACPI
+- /*
+- * All timer overrides on Nvidia are
+- * wrong unless HPET is enabled.
+- */
+- nvidia_hpet_detected = 0;
+- acpi_table_parse(ACPI_HPET,
+- nvidia_hpet_check);
+- if (nvidia_hpet_detected == 0) {
+- acpi_skip_timer_override = 1;
+- printk(KERN_INFO "Nvidia board "
+- "detected. Ignoring ACPI "
+- "timer override.\n");
+- }
+-#endif
+- /* RED-PEN skip them on mptables too? */
+- return;
+- case PCI_VENDOR_ID_ATI:
+-
+- /* This should be actually default, but
+- for 2.6.16 let's do it for ATI only where
+- it's really needed. */
+-#ifndef CONFIG_XEN
+- if (timer_over_8254 == 1) {
+- timer_over_8254 = 0;
+- printk(KERN_INFO
+- "ATI board detected. Disabling timer routing over 8254.\n");
+- }
+-#endif
+- return;
+- }
+-
+-
+- /* No multi-function device? */
+- type = read_pci_config_byte(num,slot,func,
+- PCI_HEADER_TYPE);
+- if (!(type & 0x80))
+- break;
+- }
+- }
+- }
+-}
+-
+-static int __init ioapic_pirq_setup(char *str)
+-{
+- int i, max;
+- int ints[MAX_PIRQS+1];
+-
+- get_options(str, ARRAY_SIZE(ints), ints);
+-
+- for (i = 0; i < MAX_PIRQS; i++)
+- pirq_entries[i] = -1;
+-
+- pirqs_enabled = 1;
+- apic_printk(APIC_VERBOSE, "PIRQ redirection, working around broken MP-BIOS.\n");
+- max = MAX_PIRQS;
+- if (ints[0] < MAX_PIRQS)
+- max = ints[0];
+-
+- for (i = 0; i < max; i++) {
+- apic_printk(APIC_VERBOSE, "... PIRQ%d -> IRQ %d\n", i, ints[i+1]);
+- /*
+- * PIRQs are mapped upside down, usually.
+- */
+- pirq_entries[MAX_PIRQS-i-1] = ints[i+1];
+- }
+- return 1;
+-}
+-
+-__setup("pirq=", ioapic_pirq_setup);
+
+ /*
+ * Find the IRQ entry number of a certain pin.
+@@ -479,9 +451,7 @@ static int __init find_isa_irq_pin(int i
+ for (i = 0; i < mp_irq_entries; i++) {
+ int lbus = mp_irqs[i].mpc_srcbus;
+
+- if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_MCA) &&
++ if (test_bit(lbus, mp_bus_not_pci) &&
+ (mp_irqs[i].mpc_irqtype == type) &&
+ (mp_irqs[i].mpc_srcbusirq == irq))
+
+@@ -497,9 +467,7 @@ static int __init find_isa_irq_apic(int
+ for (i = 0; i < mp_irq_entries; i++) {
+ int lbus = mp_irqs[i].mpc_srcbus;
+
+- if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_MCA) &&
++ if (test_bit(lbus, mp_bus_not_pci) &&
+ (mp_irqs[i].mpc_irqtype == type) &&
+ (mp_irqs[i].mpc_srcbusirq == irq))
+ break;
+@@ -540,7 +508,7 @@ int IO_APIC_get_PCI_irq_vector(int bus,
+ mp_irqs[i].mpc_dstapic == MP_APIC_ALL)
+ break;
+
+- if ((mp_bus_id_to_type[lbus] == MP_BUS_PCI) &&
++ if (!test_bit(lbus, mp_bus_not_pci) &&
+ !mp_irqs[i].mpc_irqtype &&
+ (bus == lbus) &&
+ (slot == ((mp_irqs[i].mpc_srcbusirq >> 2) & 0x1f))) {
+@@ -563,27 +531,6 @@ int IO_APIC_get_PCI_irq_vector(int bus,
+ return best_guess;
+ }
+
+-/*
+- * EISA Edge/Level control register, ELCR
+- */
+-static int EISA_ELCR(unsigned int irq)
+-{
+- if (irq < 16) {
+- unsigned int port = 0x4d0 + (irq >> 3);
+- return (inb(port) >> (irq & 7)) & 1;
+- }
+- apic_printk(APIC_VERBOSE, "Broken MPtable reports ISA irq %d\n", irq);
+- return 0;
+-}
+-
+-/* EISA interrupts are always polarity zero and can be edge or level
+- * trigger depending on the ELCR value. If an interrupt is listed as
+- * EISA conforming in the MP table, that means its trigger type must
+- * be read in from the ELCR */
+-
+-#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mpc_srcbusirq))
+-#define default_EISA_polarity(idx) (0)
+-
+ /* ISA interrupts are always polarity zero edge triggered,
+ * when listed as conforming in the MP table. */
+
+@@ -596,12 +543,6 @@ static int EISA_ELCR(unsigned int irq)
+ #define default_PCI_trigger(idx) (1)
+ #define default_PCI_polarity(idx) (1)
+
+-/* MCA interrupts are always polarity zero level triggered,
+- * when listed as conforming in the MP table. */
+-
+-#define default_MCA_trigger(idx) (1)
+-#define default_MCA_polarity(idx) (0)
+-
+ static int __init MPBIOS_polarity(int idx)
+ {
+ int bus = mp_irqs[idx].mpc_srcbus;
+@@ -613,38 +554,11 @@ static int __init MPBIOS_polarity(int id
+ switch (mp_irqs[idx].mpc_irqflag & 3)
+ {
+ case 0: /* conforms, ie. bus-type dependent polarity */
+- {
+- switch (mp_bus_id_to_type[bus])
+- {
+- case MP_BUS_ISA: /* ISA pin */
+- {
+- polarity = default_ISA_polarity(idx);
+- break;
+- }
+- case MP_BUS_EISA: /* EISA pin */
+- {
+- polarity = default_EISA_polarity(idx);
+- break;
+- }
+- case MP_BUS_PCI: /* PCI pin */
+- {
+- polarity = default_PCI_polarity(idx);
+- break;
+- }
+- case MP_BUS_MCA: /* MCA pin */
+- {
+- polarity = default_MCA_polarity(idx);
+- break;
+- }
+- default:
+- {
+- printk(KERN_WARNING "broken BIOS!!\n");
+- polarity = 1;
+- break;
+- }
+- }
++ if (test_bit(bus, mp_bus_not_pci))
++ polarity = default_ISA_polarity(idx);
++ else
++ polarity = default_PCI_polarity(idx);
+ break;
+- }
+ case 1: /* high active */
+ {
+ polarity = 0;
+@@ -682,38 +596,11 @@ static int MPBIOS_trigger(int idx)
+ switch ((mp_irqs[idx].mpc_irqflag>>2) & 3)
+ {
+ case 0: /* conforms, ie. bus-type dependent */
+- {
+- switch (mp_bus_id_to_type[bus])
+- {
+- case MP_BUS_ISA: /* ISA pin */
+- {
+- trigger = default_ISA_trigger(idx);
+- break;
+- }
+- case MP_BUS_EISA: /* EISA pin */
+- {
+- trigger = default_EISA_trigger(idx);
+- break;
+- }
+- case MP_BUS_PCI: /* PCI pin */
+- {
+- trigger = default_PCI_trigger(idx);
+- break;
+- }
+- case MP_BUS_MCA: /* MCA pin */
+- {
+- trigger = default_MCA_trigger(idx);
+- break;
+- }
+- default:
+- {
+- printk(KERN_WARNING "broken BIOS!!\n");
+- trigger = 1;
+- break;
+- }
+- }
++ if (test_bit(bus, mp_bus_not_pci))
++ trigger = default_ISA_trigger(idx);
++ else
++ trigger = default_PCI_trigger(idx);
+ break;
+- }
+ case 1: /* edge */
+ {
+ trigger = 0;
+@@ -750,64 +637,6 @@ static inline int irq_trigger(int idx)
+ return MPBIOS_trigger(idx);
+ }
+
+-static int next_irq = 16;
+-
+-/*
+- * gsi_irq_sharing -- Name overload! "irq" can be either a legacy IRQ
+- * in the range 0-15, a linux IRQ in the range 0-223, or a GSI number
+- * from ACPI, which can reach 800 in large boxen.
+- *
+- * Compact the sparse GSI space into a sequential IRQ series and reuse
+- * vectors if possible.
+- */
+-int gsi_irq_sharing(int gsi)
+-{
+- int i, tries, vector;
+-
+- BUG_ON(gsi >= NR_IRQ_VECTORS);
+-
+- if (platform_legacy_irq(gsi))
+- return gsi;
+-
+- if (gsi_2_irq[gsi] != 0xFF)
+- return (int)gsi_2_irq[gsi];
+-
+- tries = NR_IRQS;
+- try_again:
+- vector = assign_irq_vector(gsi);
+-
+- /*
+- * Sharing vectors means sharing IRQs, so scan irq_vectors for previous
+- * use of vector and if found, return that IRQ. However, we never want
+- * to share legacy IRQs, which usually have a different trigger mode
+- * than PCI.
+- */
+- for (i = 0; i < NR_IRQS; i++)
+- if (IO_APIC_VECTOR(i) == vector)
+- break;
+- if (platform_legacy_irq(i)) {
+- if (--tries >= 0) {
+- IO_APIC_VECTOR(i) = 0;
+- goto try_again;
+- }
+- panic("gsi_irq_sharing: didn't find an IRQ using vector 0x%02X for GSI %d", vector, gsi);
+- }
+- if (i < NR_IRQS) {
+- gsi_2_irq[gsi] = i;
+- printk(KERN_INFO "GSI %d sharing vector 0x%02X and IRQ %d\n",
+- gsi, vector, i);
+- return i;
+- }
+-
+- i = next_irq++;
+- BUG_ON(i >= NR_IRQS);
+- gsi_2_irq[gsi] = i;
+- IO_APIC_VECTOR(i) = vector;
+- printk(KERN_INFO "GSI %d assigned vector 0x%02X and IRQ %d\n",
+- gsi, vector, i);
+- return i;
+-}
+-
+ static int pin_2_irq(int idx, int apic, int pin)
+ {
+ int irq, i;
+@@ -819,49 +648,16 @@ static int pin_2_irq(int idx, int apic,
+ if (mp_irqs[idx].mpc_dstirq != pin)
+ printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n");
+
+- switch (mp_bus_id_to_type[bus])
+- {
+- case MP_BUS_ISA: /* ISA pin */
+- case MP_BUS_EISA:
+- case MP_BUS_MCA:
+- {
+- irq = mp_irqs[idx].mpc_srcbusirq;
+- break;
+- }
+- case MP_BUS_PCI: /* PCI pin */
+- {
+- /*
+- * PCI IRQs are mapped in order
+- */
+- i = irq = 0;
+- while (i < apic)
+- irq += nr_ioapic_registers[i++];
+- irq += pin;
+- irq = gsi_irq_sharing(irq);
+- break;
+- }
+- default:
+- {
+- printk(KERN_ERR "unknown bus type %d.\n",bus);
+- irq = 0;
+- break;
+- }
+- }
+- BUG_ON(irq >= NR_IRQS);
+-
+- /*
+- * PCI IRQ command line redirection. Yes, limits are hardcoded.
+- */
+- if ((pin >= 16) && (pin <= 23)) {
+- if (pirq_entries[pin-16] != -1) {
+- if (!pirq_entries[pin-16]) {
+- apic_printk(APIC_VERBOSE, "disabling PIRQ%d\n", pin-16);
+- } else {
+- irq = pirq_entries[pin-16];
+- apic_printk(APIC_VERBOSE, "using PIRQ%d -> IRQ %d\n",
+- pin-16, irq);
+- }
+- }
++ if (test_bit(bus, mp_bus_not_pci)) {
++ irq = mp_irqs[idx].mpc_srcbusirq;
++ } else {
++ /*
++ * PCI IRQs are mapped in order
++ */
++ i = irq = 0;
++ while (i < apic)
++ irq += nr_ioapic_registers[i++];
++ irq += pin;
+ }
+ BUG_ON(irq >= NR_IRQS);
+ return irq;
+@@ -885,46 +681,71 @@ static inline int IO_APIC_irq_trigger(in
+ }
+
+ /* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
+-u8 irq_vector[NR_IRQ_VECTORS] __read_mostly;
++static u8 irq_vector[NR_IRQ_VECTORS] __read_mostly;
+
+-int assign_irq_vector(int irq)
++static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
+ {
+- unsigned long flags;
+ int vector;
+ struct physdev_irq irq_op;
+
+- BUG_ON(irq != AUTO_ASSIGN && (unsigned)irq >= NR_IRQ_VECTORS);
++ BUG_ON((unsigned)irq >= NR_IRQ_VECTORS);
+
+ if (irq < PIRQ_BASE || irq - PIRQ_BASE > NR_PIRQS)
+ return -EINVAL;
+
+- spin_lock_irqsave(&vector_lock, flags);
++ cpus_and(*result, mask, cpu_online_map);
+
+- if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0) {
+- spin_unlock_irqrestore(&vector_lock, flags);
+- return IO_APIC_VECTOR(irq);
+- }
++ if (irq_vector[irq] > 0)
++ return irq_vector[irq];
+
+ irq_op.irq = irq;
+- if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op)) {
+- spin_unlock_irqrestore(&vector_lock, flags);
++ if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op))
+ return -ENOSPC;
+- }
+
+ vector = irq_op.vector;
+- vector_irq[vector] = irq;
+- if (irq != AUTO_ASSIGN)
+- IO_APIC_VECTOR(irq) = vector;
++ irq_vector[irq] = vector;
+
+- spin_unlock_irqrestore(&vector_lock, flags);
++ return vector;
++}
++
++static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
++{
++ int vector;
++ unsigned long flags;
+
++ spin_lock_irqsave(&vector_lock, flags);
++ vector = __assign_irq_vector(irq, mask, result);
++ spin_unlock_irqrestore(&vector_lock, flags);
+ return vector;
+ }
+
+-extern void (*interrupt[NR_IRQS])(void);
+ #ifndef CONFIG_XEN
+-static struct hw_interrupt_type ioapic_level_type;
+-static struct hw_interrupt_type ioapic_edge_type;
++void __setup_vector_irq(int cpu)
++{
++ /* Initialize vector_irq on a new cpu */
++ /* This function must be called with vector_lock held */
++ int irq, vector;
++
++ /* Mark the inuse vectors */
++ for (irq = 0; irq < NR_IRQ_VECTORS; ++irq) {
++ if (!cpu_isset(cpu, irq_domain[irq]))
++ continue;
++ vector = irq_vector[irq];
++ per_cpu(vector_irq, cpu)[vector] = irq;
++ }
++ /* Mark the free vectors */
++ for (vector = 0; vector < NR_VECTORS; ++vector) {
++ irq = per_cpu(vector_irq, cpu)[vector];
++ if (irq < 0)
++ continue;
++ if (!cpu_isset(cpu, irq_domain[irq]))
++ per_cpu(vector_irq, cpu)[vector] = -1;
++ }
++}
++
++extern void (*interrupt[NR_IRQS])(void);
++
++static struct irq_chip ioapic_chip;
+
+ #define IOAPIC_AUTO -1
+ #define IOAPIC_EDGE 0
+@@ -932,16 +753,15 @@ static struct hw_interrupt_type ioapic_e
+
+ static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
+ {
+- unsigned idx;
+-
+- idx = use_pci_vector() && !platform_legacy_irq(irq) ? vector : irq;
+-
+ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+ trigger == IOAPIC_LEVEL)
+- irq_desc[idx].chip = &ioapic_level_type;
+- else
+- irq_desc[idx].chip = &ioapic_edge_type;
+- set_intr_gate(vector, interrupt[idx]);
++ set_irq_chip_and_handler_name(irq, &ioapic_chip,
++ handle_fasteoi_irq, "fasteoi");
++ else {
++ irq_desc[irq].status |= IRQ_DELAYED_DISABLE;
++ set_irq_chip_and_handler_name(irq, &ioapic_chip,
++ handle_edge_irq, "edge");
++ }
+ }
+ #else
+ #define ioapic_register_intr(irq, vector, trigger) evtchn_register_pirq(irq)
+@@ -994,16 +814,21 @@ static void __init setup_IO_APIC_irqs(vo
+ continue;
+
+ if (IO_APIC_IRQ(irq)) {
+- vector = assign_irq_vector(irq);
++ cpumask_t mask;
++ vector = assign_irq_vector(irq, TARGET_CPUS, &mask);
++ if (vector < 0)
++ continue;
++
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(mask);
+ entry.vector = vector;
+
+ ioapic_register_intr(irq, vector, IOAPIC_AUTO);
+ if (!apic && (irq < 16))
+ disable_8259A_irq(irq);
+ }
++ ioapic_write_entry(apic, pin, entry);
++
+ spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1));
+- io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0));
+ set_native_irq_info(irq, TARGET_CPUS);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+@@ -1046,7 +871,7 @@ static void __init setup_ExtINT_IRQ0_pin
+ * The timer IRQ doesn't have to know that behind the
+ * scene we have a 8259A-master in AEOI mode ...
+ */
+- irq_desc[0].chip = &ioapic_edge_type;
++ set_irq_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, "edge");
+
+ /*
+ * Add it to the IO-APIC irq-routing table:
+@@ -1142,10 +967,7 @@ void __apicdebuginit print_IO_APIC(void)
+ for (i = 0; i <= reg_01.bits.entries; i++) {
+ struct IO_APIC_route_entry entry;
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- *(((int *)&entry)+0) = io_apic_read(apic, 0x10+i*2);
+- *(((int *)&entry)+1) = io_apic_read(apic, 0x11+i*2);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ entry = ioapic_read_entry(apic, i);
+
+ printk(KERN_DEBUG " %02x %03X %02X ",
+ i,
+@@ -1165,17 +987,12 @@ void __apicdebuginit print_IO_APIC(void)
+ );
+ }
+ }
+- if (use_pci_vector())
+- printk(KERN_INFO "Using vector-based indexing\n");
+ printk(KERN_DEBUG "IRQ to pin mappings:\n");
+ for (i = 0; i < NR_IRQS; i++) {
+ struct irq_pin_list *entry = irq_2_pin + i;
+ if (entry->pin < 0)
+ continue;
+- if (use_pci_vector() && !platform_legacy_irq(i))
+- printk(KERN_DEBUG "IRQ%d ", IO_APIC_VECTOR(i));
+- else
+- printk(KERN_DEBUG "IRQ%d ", i);
++ printk(KERN_DEBUG "IRQ%d ", i);
+ for (;;) {
+ printk("-> %d:%d", entry->apic, entry->pin);
+ if (!entry->next)
+@@ -1339,9 +1156,6 @@ static void __init enable_IO_APIC(void)
+ irq_2_pin[i].pin = -1;
+ irq_2_pin[i].next = 0;
+ }
+- if (!pirqs_enabled)
+- for (i = 0; i < MAX_PIRQS; i++)
+- pirq_entries[i] = -1;
+
+ /*
+ * The number of IO-APIC IRQ registers (== #pins):
+@@ -1358,11 +1172,7 @@ static void __init enable_IO_APIC(void)
+ /* See if any of the pins is in ExtINT mode */
+ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+ struct IO_APIC_route_entry entry;
+- spin_lock_irqsave(&ioapic_lock, flags);
+- *(((int *)&entry) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
+- *(((int *)&entry) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
+-
++ entry = ioapic_read_entry(apic, pin);
+
+ /* If the interrupt line is enabled and in ExtInt mode
+ * I have found the pin where the i8259 is connected.
+@@ -1416,7 +1226,6 @@ void disable_IO_APIC(void)
+ */
+ if (ioapic_i8259.pin != -1) {
+ struct IO_APIC_route_entry entry;
+- unsigned long flags;
+
+ memset(&entry, 0, sizeof(entry));
+ entry.mask = 0; /* Enabled */
+@@ -1433,12 +1242,7 @@ void disable_IO_APIC(void)
+ /*
+ * Add it to the IO-APIC irq-routing table:
+ */
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(ioapic_i8259.apic, 0x11+2*ioapic_i8259.pin,
+- *(((int *)&entry)+1));
+- io_apic_write(ioapic_i8259.apic, 0x10+2*ioapic_i8259.pin,
+- *(((int *)&entry)+0));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(ioapic_i8259.apic, ioapic_i8259.pin, entry);
+ }
+
+ disconnect_bsp_APIC(ioapic_i8259.pin != -1);
+@@ -1446,76 +1250,6 @@ void disable_IO_APIC(void)
+ }
+
+ /*
+- * function to set the IO-APIC physical IDs based on the
+- * values stored in the MPC table.
+- *
+- * by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999
+- */
+-
+-#ifndef CONFIG_XEN
+-static void __init setup_ioapic_ids_from_mpc (void)
+-{
+- union IO_APIC_reg_00 reg_00;
+- int apic;
+- int i;
+- unsigned char old_id;
+- unsigned long flags;
+-
+- /*
+- * Set the IOAPIC ID to the value stored in the MPC table.
+- */
+- for (apic = 0; apic < nr_ioapics; apic++) {
+-
+- /* Read the register 0 value */
+- spin_lock_irqsave(&ioapic_lock, flags);
+- reg_00.raw = io_apic_read(apic, 0);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
+-
+- old_id = mp_ioapics[apic].mpc_apicid;
+-
+-
+- printk(KERN_INFO "Using IO-APIC %d\n", mp_ioapics[apic].mpc_apicid);
+-
+-
+- /*
+- * We need to adjust the IRQ routing table
+- * if the ID changed.
+- */
+- if (old_id != mp_ioapics[apic].mpc_apicid)
+- for (i = 0; i < mp_irq_entries; i++)
+- if (mp_irqs[i].mpc_dstapic == old_id)
+- mp_irqs[i].mpc_dstapic
+- = mp_ioapics[apic].mpc_apicid;
+-
+- /*
+- * Read the right value from the MPC table and
+- * write it into the ID register.
+- */
+- apic_printk(APIC_VERBOSE,KERN_INFO "...changing IO-APIC physical APIC ID to %d ...",
+- mp_ioapics[apic].mpc_apicid);
+-
+- reg_00.bits.ID = mp_ioapics[apic].mpc_apicid;
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0, reg_00.raw);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
+-
+- /*
+- * Sanity check
+- */
+- spin_lock_irqsave(&ioapic_lock, flags);
+- reg_00.raw = io_apic_read(apic, 0);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
+- if (reg_00.bits.ID != mp_ioapics[apic].mpc_apicid)
+- printk("could not set ID!\n");
+- else
+- apic_printk(APIC_VERBOSE," ok.\n");
+- }
+-}
+-#else
+-static void __init setup_ioapic_ids_from_mpc(void) { }
+-#endif
+-
+-/*
+ * There is a nasty bug in some older SMP boards, their mptable lies
+ * about the timer IRQ. We do the following to work around the situation:
+ *
+@@ -1569,7 +1303,7 @@ static int __init timer_irq_works(void)
+ * an edge even if it isn't on the 8259A...
+ */
+
+-static unsigned int startup_edge_ioapic_irq(unsigned int irq)
++static unsigned int startup_ioapic_irq(unsigned int irq)
+ {
+ int was_pending = 0;
+ unsigned long flags;
+@@ -1586,107 +1320,19 @@ static unsigned int startup_edge_ioapic_
+ return was_pending;
+ }
+
+-/*
+- * Once we have recorded IRQ_PENDING already, we can mask the
+- * interrupt for real. This prevents IRQ storms from unhandled
+- * devices.
+- */
+-static void ack_edge_ioapic_irq(unsigned int irq)
+-{
+- move_irq(irq);
+- if ((irq_desc[irq].status & (IRQ_PENDING | IRQ_DISABLED))
+- == (IRQ_PENDING | IRQ_DISABLED))
+- mask_IO_APIC_irq(irq);
+- ack_APIC_irq();
+-}
+-
+-/*
+- * Level triggered interrupts can just be masked,
+- * and shutting down and starting up the interrupt
+- * is the same as enabling and disabling them -- except
+- * with a startup need to return a "was pending" value.
+- *
+- * Level triggered interrupts are special because we
+- * do not touch any IO-APIC register while handling
+- * them. We ack the APIC in the end-IRQ handler, not
+- * in the start-IRQ-handler. Protection against reentrance
+- * from the same interrupt is still provided, both by the
+- * generic IRQ layer and by the fact that an unacked local
+- * APIC does not accept IRQs.
+- */
+-static unsigned int startup_level_ioapic_irq (unsigned int irq)
+-{
+- unmask_IO_APIC_irq(irq);
+-
+- return 0; /* don't check for pending */
+-}
+-
+-static void end_level_ioapic_irq (unsigned int irq)
+-{
+- move_irq(irq);
+- ack_APIC_irq();
+-}
+-
+-#ifdef CONFIG_PCI_MSI
+-static unsigned int startup_edge_ioapic_vector(unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- return startup_edge_ioapic_irq(irq);
+-}
+-
+-static void ack_edge_ioapic_vector(unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- move_native_irq(vector);
+- ack_edge_ioapic_irq(irq);
+-}
+-
+-static unsigned int startup_level_ioapic_vector (unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- return startup_level_ioapic_irq (irq);
+-}
+-
+-static void end_level_ioapic_vector (unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- move_native_irq(vector);
+- end_level_ioapic_irq(irq);
+-}
+-
+-static void mask_IO_APIC_vector (unsigned int vector)
+-{
+- int irq = vector_to_irq(vector);
+-
+- mask_IO_APIC_irq(irq);
+-}
+-
+-static void unmask_IO_APIC_vector (unsigned int vector)
++static int ioapic_retrigger_irq(unsigned int irq)
+ {
+- int irq = vector_to_irq(vector);
+-
+- unmask_IO_APIC_irq(irq);
+-}
+-
+-#ifdef CONFIG_SMP
+-static void set_ioapic_affinity_vector (unsigned int vector,
+- cpumask_t cpu_mask)
+-{
+- int irq = vector_to_irq(vector);
++ cpumask_t mask;
++ unsigned vector;
++ unsigned long flags;
+
+- set_native_irq_info(vector, cpu_mask);
+- set_ioapic_affinity_irq(irq, cpu_mask);
+-}
+-#endif // CONFIG_SMP
+-#endif // CONFIG_PCI_MSI
++ spin_lock_irqsave(&vector_lock, flags);
++ vector = irq_vector[irq];
++ cpus_clear(mask);
++ cpu_set(first_cpu(irq_domain[irq]), mask);
+
+-static int ioapic_retrigger(unsigned int irq)
+-{
+- send_IPI_self(IO_APIC_VECTOR(irq));
++ send_IPI_mask(mask, vector);
++ spin_unlock_irqrestore(&vector_lock, flags);
+
+ return 1;
+ }
+@@ -1700,32 +1346,47 @@ static int ioapic_retrigger(unsigned int
+ * races.
+ */
+
+-static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
+- .typename = "IO-APIC-edge",
+- .startup = startup_edge_ioapic,
+- .shutdown = shutdown_edge_ioapic,
+- .enable = enable_edge_ioapic,
+- .disable = disable_edge_ioapic,
+- .ack = ack_edge_ioapic,
+- .end = end_edge_ioapic,
+-#ifdef CONFIG_SMP
+- .set_affinity = set_ioapic_affinity,
++static void ack_apic_edge(unsigned int irq)
++{
++ move_native_irq(irq);
++ ack_APIC_irq();
++}
++
++static void ack_apic_level(unsigned int irq)
++{
++ int do_unmask_irq = 0;
++
++#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
++ /* If we are moving the irq we need to mask it */
++ if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) {
++ do_unmask_irq = 1;
++ mask_IO_APIC_irq(irq);
++ }
+ #endif
+- .retrigger = ioapic_retrigger,
+-};
+
+-static struct hw_interrupt_type ioapic_level_type __read_mostly = {
+- .typename = "IO-APIC-level",
+- .startup = startup_level_ioapic,
+- .shutdown = shutdown_level_ioapic,
+- .enable = enable_level_ioapic,
+- .disable = disable_level_ioapic,
+- .ack = mask_and_ack_level_ioapic,
+- .end = end_level_ioapic,
++ /*
++ * We must acknowledge the irq before we move it or the acknowledge will
++ * not propogate properly.
++ */
++ ack_APIC_irq();
++
++ /* Now we can move and renable the irq */
++ move_masked_irq(irq);
++ if (unlikely(do_unmask_irq))
++ unmask_IO_APIC_irq(irq);
++}
++
++static struct irq_chip ioapic_chip __read_mostly = {
++ .name = "IO-APIC",
++ .startup = startup_ioapic_irq,
++ .mask = mask_IO_APIC_irq,
++ .unmask = unmask_IO_APIC_irq,
++ .ack = ack_apic_edge,
++ .eoi = ack_apic_level,
+ #ifdef CONFIG_SMP
+- .set_affinity = set_ioapic_affinity,
++ .set_affinity = set_ioapic_affinity_irq,
+ #endif
+- .retrigger = ioapic_retrigger,
++ .retrigger = ioapic_retrigger_irq,
+ };
+ #endif /* !CONFIG_XEN */
+
+@@ -1746,12 +1407,7 @@ static inline void init_IO_APIC_traps(vo
+ */
+ for (irq = 0; irq < NR_IRQS ; irq++) {
+ int tmp = irq;
+- if (use_pci_vector()) {
+- if (!platform_legacy_irq(tmp))
+- if ((tmp = vector_to_irq(tmp)) == -1)
+- continue;
+- }
+- if (IO_APIC_IRQ(tmp) && !IO_APIC_VECTOR(tmp)) {
++ if (IO_APIC_IRQ(tmp) && !irq_vector[tmp]) {
+ /*
+ * Hmm.. We don't have an entry for this,
+ * so default to an old-fashioned 8259
+@@ -1762,7 +1418,7 @@ static inline void init_IO_APIC_traps(vo
+ #ifndef CONFIG_XEN
+ else
+ /* Strange. Oh, well.. */
+- irq_desc[irq].chip = &no_irq_type;
++ irq_desc[irq].chip = &no_irq_chip;
+ #endif
+ }
+ }
+@@ -1883,8 +1539,6 @@ static inline void unlock_ExtINT_logic(v
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+
+-int timer_uses_ioapic_pin_0;
+-
+ /*
+ * This code may look a bit paranoid, but it's supposed to cooperate with
+ * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ
+@@ -1897,13 +1551,13 @@ static inline void check_timer(void)
+ {
+ int apic1, pin1, apic2, pin2;
+ int vector;
++ cpumask_t mask;
+
+ /*
+ * get/set the timer IRQ vector:
+ */
+ disable_8259A_irq(0);
+- vector = assign_irq_vector(0);
+- set_intr_gate(vector, interrupt[0]);
++ vector = assign_irq_vector(0, TARGET_CPUS, &mask);
+
+ /*
+ * Subtle, code in do_timer_interrupt() expects an AEOI
+@@ -1922,9 +1576,6 @@ static inline void check_timer(void)
+ pin2 = ioapic_i8259.pin;
+ apic2 = ioapic_i8259.apic;
+
+- if (pin1 == 0)
+- timer_uses_ioapic_pin_0 = 1;
+-
+ apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
+ vector, apic1, pin1, apic2, pin2);
+
+@@ -2039,11 +1690,6 @@ void __init setup_IO_APIC(void)
+
+ apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
+
+- /*
+- * Set up the IO-APIC IRQ routing table.
+- */
+- if (!acpi_ioapic)
+- setup_ioapic_ids_from_mpc();
+ #ifndef CONFIG_XEN
+ sync_Arb_IDs();
+ #endif /* !CONFIG_XEN */
+@@ -2066,17 +1712,12 @@ static int ioapic_suspend(struct sys_dev
+ {
+ struct IO_APIC_route_entry *entry;
+ struct sysfs_ioapic_data *data;
+- unsigned long flags;
+ int i;
+
+ data = container_of(dev, struct sysfs_ioapic_data, dev);
+ entry = data->entry;
+- spin_lock_irqsave(&ioapic_lock, flags);
+- for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) {
+- *(((int *)entry) + 1) = io_apic_read(dev->id, 0x11 + 2 * i);
+- *(((int *)entry) + 0) = io_apic_read(dev->id, 0x10 + 2 * i);
+- }
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ )
++ *entry = ioapic_read_entry(dev->id, i);
+
+ return 0;
+ }
+@@ -2098,11 +1739,9 @@ static int ioapic_resume(struct sys_devi
+ reg_00.bits.ID = mp_ioapics[dev->id].mpc_apicid;
+ io_apic_write(dev->id, 0, reg_00.raw);
+ }
+- for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) {
+- io_apic_write(dev->id, 0x11+2*i, *(((int *)entry)+1));
+- io_apic_write(dev->id, 0x10+2*i, *(((int *)entry)+0));
+- }
+ spin_unlock_irqrestore(&ioapic_lock, flags);
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i++)
++ ioapic_write_entry(dev->id, i, entry[i]);
+
+ return 0;
+ }
+@@ -2148,28 +1787,254 @@ static int __init ioapic_init_sysfs(void
+
+ device_initcall(ioapic_init_sysfs);
+
++/*
++ * Dynamic irq allocate and deallocation
++ */
++int create_irq(void)
++{
++ /* Allocate an unused irq */
++ int irq;
++ int new;
++ int vector = 0;
++ unsigned long flags;
++ cpumask_t mask;
++
++ irq = -ENOSPC;
++ spin_lock_irqsave(&vector_lock, flags);
++ for (new = (NR_IRQS - 1); new >= 0; new--) {
++ if (platform_legacy_irq(new))
++ continue;
++ if (irq_vector[new] != 0)
++ continue;
++ vector = __assign_irq_vector(new, TARGET_CPUS, &mask);
++ if (likely(vector > 0))
++ irq = new;
++ break;
++ }
++ spin_unlock_irqrestore(&vector_lock, flags);
++
++ if (irq >= 0) {
++ dynamic_irq_init(irq);
++ }
++ return irq;
++}
++
++void destroy_irq(unsigned int irq)
++{
++ unsigned long flags;
++
++ dynamic_irq_cleanup(irq);
++
++ spin_lock_irqsave(&vector_lock, flags);
++ irq_vector[irq] = 0;
++ spin_unlock_irqrestore(&vector_lock, flags);
++}
++
+ #endif /* CONFIG_XEN */
+
+-/* --------------------------------------------------------------------------
+- ACPI-based IOAPIC Configuration
+- -------------------------------------------------------------------------- */
++/*
++ * MSI mesage composition
++ */
++#if defined(CONFIG_PCI_MSI) && !defined(CONFIG_XEN)
++static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
++{
++ int vector;
++ unsigned dest;
++ cpumask_t tmp;
+
+-#ifdef CONFIG_ACPI
++ vector = assign_irq_vector(irq, TARGET_CPUS, &tmp);
++ if (vector >= 0) {
++ dest = cpu_mask_to_apicid(tmp);
++
++ msg->address_hi = MSI_ADDR_BASE_HI;
++ msg->address_lo =
++ MSI_ADDR_BASE_LO |
++ ((INT_DEST_MODE == 0) ?
++ MSI_ADDR_DEST_MODE_PHYSICAL:
++ MSI_ADDR_DEST_MODE_LOGICAL) |
++ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
++ MSI_ADDR_REDIRECTION_CPU:
++ MSI_ADDR_REDIRECTION_LOWPRI) |
++ MSI_ADDR_DEST_ID(dest);
++
++ msg->data =
++ MSI_DATA_TRIGGER_EDGE |
++ MSI_DATA_LEVEL_ASSERT |
++ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
++ MSI_DATA_DELIVERY_FIXED:
++ MSI_DATA_DELIVERY_LOWPRI) |
++ MSI_DATA_VECTOR(vector);
++ }
++ return vector;
++}
+
+-#define IO_APIC_MAX_ID 0xFE
++#ifdef CONFIG_SMP
++static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
++{
++ struct msi_msg msg;
++ unsigned int dest;
++ cpumask_t tmp;
++ int vector;
++
++ cpus_and(tmp, mask, cpu_online_map);
++ if (cpus_empty(tmp))
++ tmp = TARGET_CPUS;
++
++ cpus_and(mask, tmp, CPU_MASK_ALL);
++
++ vector = assign_irq_vector(irq, mask, &tmp);
++ if (vector < 0)
++ return;
++
++ dest = cpu_mask_to_apicid(tmp);
++
++ read_msi_msg(irq, &msg);
++
++ msg.data &= ~MSI_DATA_VECTOR_MASK;
++ msg.data |= MSI_DATA_VECTOR(vector);
++ msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
++ msg.address_lo |= MSI_ADDR_DEST_ID(dest);
+
+-int __init io_apic_get_version (int ioapic)
++ write_msi_msg(irq, &msg);
++ set_native_irq_info(irq, mask);
++}
++#endif /* CONFIG_SMP */
++
++/*
++ * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices,
++ * which implement the MSI or MSI-X Capability Structure.
++ */
++static struct irq_chip msi_chip = {
++ .name = "PCI-MSI",
++ .unmask = unmask_msi_irq,
++ .mask = mask_msi_irq,
++ .ack = ack_apic_edge,
++#ifdef CONFIG_SMP
++ .set_affinity = set_msi_irq_affinity,
++#endif
++ .retrigger = ioapic_retrigger_irq,
++};
++
++int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev)
+ {
+- union IO_APIC_reg_01 reg_01;
+- unsigned long flags;
++ struct msi_msg msg;
++ int ret;
++ ret = msi_compose_msg(dev, irq, &msg);
++ if (ret < 0)
++ return ret;
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- reg_01.raw = io_apic_read(ioapic, 1);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ write_msi_msg(irq, &msg);
+
+- return reg_01.bits.version;
++ set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq, "edge");
++
++ return 0;
++}
++
++void arch_teardown_msi_irq(unsigned int irq)
++{
++ return;
+ }
+
++#endif /* CONFIG_PCI_MSI */
++
++/*
++ * Hypertransport interrupt support
++ */
++#ifdef CONFIG_HT_IRQ
++
++#ifdef CONFIG_SMP
++
++static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector)
++{
++ struct ht_irq_msg msg;
++ fetch_ht_irq_msg(irq, &msg);
++
++ msg.address_lo &= ~(HT_IRQ_LOW_VECTOR_MASK | HT_IRQ_LOW_DEST_ID_MASK);
++ msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK);
++
++ msg.address_lo |= HT_IRQ_LOW_VECTOR(vector) | HT_IRQ_LOW_DEST_ID(dest);
++ msg.address_hi |= HT_IRQ_HIGH_DEST_ID(dest);
++
++ write_ht_irq_msg(irq, &msg);
++}
++
++static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
++{
++ unsigned int dest;
++ cpumask_t tmp;
++ int vector;
++
++ cpus_and(tmp, mask, cpu_online_map);
++ if (cpus_empty(tmp))
++ tmp = TARGET_CPUS;
++
++ cpus_and(mask, tmp, CPU_MASK_ALL);
++
++ vector = assign_irq_vector(irq, mask, &tmp);
++ if (vector < 0)
++ return;
++
++ dest = cpu_mask_to_apicid(tmp);
++
++ target_ht_irq(irq, dest, vector);
++ set_native_irq_info(irq, mask);
++}
++#endif
++
++static struct irq_chip ht_irq_chip = {
++ .name = "PCI-HT",
++ .mask = mask_ht_irq,
++ .unmask = unmask_ht_irq,
++ .ack = ack_apic_edge,
++#ifdef CONFIG_SMP
++ .set_affinity = set_ht_irq_affinity,
++#endif
++ .retrigger = ioapic_retrigger_irq,
++};
++
++int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
++{
++ int vector;
++ cpumask_t tmp;
++
++ vector = assign_irq_vector(irq, TARGET_CPUS, &tmp);
++ if (vector >= 0) {
++ struct ht_irq_msg msg;
++ unsigned dest;
++
++ dest = cpu_mask_to_apicid(tmp);
++
++ msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest);
++
++ msg.address_lo =
++ HT_IRQ_LOW_BASE |
++ HT_IRQ_LOW_DEST_ID(dest) |
++ HT_IRQ_LOW_VECTOR(vector) |
++ ((INT_DEST_MODE == 0) ?
++ HT_IRQ_LOW_DM_PHYSICAL :
++ HT_IRQ_LOW_DM_LOGICAL) |
++ HT_IRQ_LOW_RQEOI_EDGE |
++ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
++ HT_IRQ_LOW_MT_FIXED :
++ HT_IRQ_LOW_MT_ARBITRATED) |
++ HT_IRQ_LOW_IRQ_MASKED;
++
++ write_ht_irq_msg(irq, &msg);
++
++ set_irq_chip_and_handler_name(irq, &ht_irq_chip,
++ handle_edge_irq, "edge");
++ }
++ return vector;
++}
++#endif /* CONFIG_HT_IRQ */
++
++/* --------------------------------------------------------------------------
++ ACPI-based IOAPIC Configuration
++ -------------------------------------------------------------------------- */
++
++#ifdef CONFIG_ACPI
++
++#define IO_APIC_MAX_ID 0xFE
+
+ int __init io_apic_get_redir_entries (int ioapic)
+ {
+@@ -2188,6 +2053,8 @@ int io_apic_set_pci_routing (int ioapic,
+ {
+ struct IO_APIC_route_entry entry;
+ unsigned long flags;
++ int vector;
++ cpumask_t mask;
+
+ if (!IO_APIC_IRQ(irq)) {
+ apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
+@@ -2196,6 +2063,17 @@ int io_apic_set_pci_routing (int ioapic,
+ }
+
+ /*
++ * IRQs < 16 are already in the irq_2_pin[] map
++ */
++ if (irq >= 16)
++ add_pin_to_irq(irq, ioapic, pin);
++
++
++ vector = assign_irq_vector(irq, TARGET_CPUS, &mask);
++ if (vector < 0)
++ return vector;
++
++ /*
+ * Generate a PCI IRQ routing entry and program the IOAPIC accordingly.
+ * Note that we mask (disable) IRQs now -- these get enabled when the
+ * corresponding device driver registers for this IRQ.
+@@ -2205,19 +2083,11 @@ int io_apic_set_pci_routing (int ioapic,
+
+ entry.delivery_mode = INT_DELIVERY_MODE;
+ entry.dest_mode = INT_DEST_MODE;
+- entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(mask);
+ entry.trigger = edge_level;
+ entry.polarity = active_high_low;
+ entry.mask = 1; /* Disabled (masked) */
+-
+- irq = gsi_irq_sharing(irq);
+- /*
+- * IRQs < 16 are already in the irq_2_pin[] map
+- */
+- if (irq >= 16)
+- add_pin_to_irq(irq, ioapic, pin);
+-
+- entry.vector = assign_irq_vector(irq);
++ entry.vector = vector & 0xff;
+
+ apic_printk(APIC_VERBOSE,KERN_DEBUG "IOAPIC[%d]: Set PCI routing entry (%d-%d -> 0x%x -> "
+ "IRQ %d Mode:%i Active:%i)\n", ioapic,
+@@ -2229,10 +2099,10 @@ int io_apic_set_pci_routing (int ioapic,
+ if (!ioapic && (irq < 16))
+ disable_8259A_irq(irq);
+
++ ioapic_write_entry(ioapic, pin, entry);
++
+ spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(ioapic, 0x11+2*pin, *(((int *)&entry)+1));
+- io_apic_write(ioapic, 0x10+2*pin, *(((int *)&entry)+0));
+- set_native_irq_info(use_pci_vector() ? entry.vector : irq, TARGET_CPUS);
++ set_native_irq_info(irq, TARGET_CPUS);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ return 0;
+Index: head-2008-12-01/arch/x86/kernel/ioport_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ioport_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ioport_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -58,6 +58,7 @@ asmlinkage long sys_ioperm(unsigned long
+
+ memset(bitmap, 0xff, IO_BITMAP_BYTES);
+ t->io_bitmap_ptr = bitmap;
++ set_thread_flag(TIF_IO_BITMAP);
+
+ set_xen_guest_handle(set_iobitmap.bitmap, (char *)bitmap);
+ set_iobitmap.nr_ports = IO_BITMAP_BITS;
+Index: head-2008-12-01/arch/x86/kernel/irq_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -20,11 +20,6 @@
+ #include <asm/idle.h>
+
+ atomic_t irq_err_count;
+-#ifdef CONFIG_X86_IO_APIC
+-#ifdef APIC_MISMATCH_DEBUG
+-atomic_t irq_mis_count;
+-#endif
+-#endif
+
+ #ifdef CONFIG_DEBUG_STACKOVERFLOW
+ /*
+@@ -79,7 +74,8 @@ int show_interrupts(struct seq_file *p,
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+ #endif
+- seq_printf(p, " %14s", irq_desc[i].chip->typename);
++ seq_printf(p, " %8s", irq_desc[i].chip->name);
++ seq_printf(p, "-%-8s", irq_desc[i].name);
+
+ seq_printf(p, " %s", action->name);
+ for (action=action->next; action; action = action->next)
+@@ -99,11 +95,6 @@ skip:
+ seq_putc(p, '\n');
+ #endif
+ seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
+-#ifdef CONFIG_X86_IO_APIC
+-#ifdef APIC_MISMATCH_DEBUG
+- seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
+-#endif
+-#endif
+ }
+ return 0;
+ }
+@@ -114,24 +105,28 @@ skip:
+ * handlers).
+ */
+ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
+-{
++{
++ struct pt_regs *old_regs = set_irq_regs(regs);
++
+ /* high bit used in ret_from_ code */
+ unsigned irq = ~regs->orig_rax;
+
+- if (unlikely(irq >= NR_IRQS)) {
+- printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
+- __FUNCTION__, irq);
+- BUG();
+- }
+-
+ /*exit_idle();*/
+ /*irq_enter();*/
++
+ #ifdef CONFIG_DEBUG_STACKOVERFLOW
+ stack_overflow_check(regs);
+ #endif
+- __do_IRQ(irq, regs);
++
++ if (likely(irq < NR_IRQS))
++ generic_handle_irq(irq);
++ else
++ printk(KERN_EMERG "%s: %d.%d No irq handler for irq\n",
++ __func__, smp_processor_id(), irq);
++
+ /*irq_exit();*/
+
++ set_irq_regs(old_regs);
+ return 1;
+ }
+
+@@ -192,6 +187,6 @@ EXPORT_SYMBOL(do_softirq);
+ */
+ void ack_bad_irq(unsigned int irq)
+ {
+- printk("unexpected IRQ trap at vector %02x\n", irq);
++ printk("unexpected IRQ trap at irq %02x\n", irq);
+ }
+ #endif
+Index: head-2008-12-01/arch/x86/kernel/mpparse_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/mpparse_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/mpparse_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -41,8 +41,7 @@ int acpi_found_madt;
+ * Various Linux-internal data structures created from the
+ * MP-table.
+ */
+-unsigned char apic_version [MAX_APICS];
+-unsigned char mp_bus_id_to_type [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
++DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
+ int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
+
+ static int mp_current_pci_id = 0;
+@@ -56,7 +55,6 @@ struct mpc_config_intsrc mp_irqs[MAX_IRQ
+ int mp_irq_entries;
+
+ int nr_ioapics;
+-int pic_mode;
+ unsigned long mp_lapic_addr = 0;
+
+
+@@ -71,19 +69,6 @@ unsigned disabled_cpus __initdata;
+ /* Bitmask of physically existing CPUs */
+ physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
+
+-/* ACPI MADT entry parsing functions */
+-#ifdef CONFIG_ACPI
+-extern struct acpi_boot_flags acpi_boot;
+-#ifdef CONFIG_X86_LOCAL_APIC
+-extern int acpi_parse_lapic (acpi_table_entry_header *header);
+-extern int acpi_parse_lapic_addr_ovr (acpi_table_entry_header *header);
+-extern int acpi_parse_lapic_nmi (acpi_table_entry_header *header);
+-#endif /*CONFIG_X86_LOCAL_APIC*/
+-#ifdef CONFIG_X86_IO_APIC
+-extern int acpi_parse_ioapic (acpi_table_entry_header *header);
+-#endif /*CONFIG_X86_IO_APIC*/
+-#endif /*CONFIG_ACPI*/
+-
+ u8 bios_cpu_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
+
+
+@@ -109,24 +94,20 @@ static int __init mpf_checksum(unsigned
+ static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
+ {
+ int cpu;
+- unsigned char ver;
+ cpumask_t tmp_map;
++ char *bootup_cpu = "";
+
+ if (!(m->mpc_cpuflag & CPU_ENABLED)) {
+ disabled_cpus++;
+ return;
+ }
+-
+- printk(KERN_INFO "Processor #%d %d:%d APIC version %d\n",
+- m->mpc_apicid,
+- (m->mpc_cpufeature & CPU_FAMILY_MASK)>>8,
+- (m->mpc_cpufeature & CPU_MODEL_MASK)>>4,
+- m->mpc_apicver);
+-
+ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
+- Dprintk(" Bootup CPU\n");
++ bootup_cpu = " (Bootup-CPU)";
+ boot_cpu_id = m->mpc_apicid;
+ }
++
++ printk(KERN_INFO "Processor #%d%s\n", m->mpc_apicid, bootup_cpu);
++
+ if (num_processors >= NR_CPUS) {
+ printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
+ " Processor ignored.\n", NR_CPUS);
+@@ -137,24 +118,7 @@ static void __cpuinit MP_processor_info
+ cpus_complement(tmp_map, cpu_present_map);
+ cpu = first_cpu(tmp_map);
+
+-#if MAX_APICS < 255
+- if ((int)m->mpc_apicid > MAX_APICS) {
+- printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
+- m->mpc_apicid, MAX_APICS);
+- return;
+- }
+-#endif
+- ver = m->mpc_apicver;
+-
+ physid_set(m->mpc_apicid, phys_cpu_present_map);
+- /*
+- * Validate version
+- */
+- if (ver == 0x0) {
+- printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! fixing up to 0x10. (tell your hw vendor)\n", m->mpc_apicid);
+- ver = 0x10;
+- }
+- apic_version[m->mpc_apicid] = ver;
+ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
+ /*
+ * bios_cpu_apicid is required to have processors listed
+@@ -185,37 +149,42 @@ static void __init MP_bus_info (struct m
+ Dprintk("Bus #%d is %s\n", m->mpc_busid, str);
+
+ if (strncmp(str, "ISA", 3) == 0) {
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
+- } else if (strncmp(str, "EISA", 4) == 0) {
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_EISA;
++ set_bit(m->mpc_busid, mp_bus_not_pci);
+ } else if (strncmp(str, "PCI", 3) == 0) {
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI;
++ clear_bit(m->mpc_busid, mp_bus_not_pci);
+ mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
+ mp_current_pci_id++;
+- } else if (strncmp(str, "MCA", 3) == 0) {
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
+ } else {
+ printk(KERN_ERR "Unknown bustype %s\n", str);
+ }
+ }
+
++static int bad_ioapic(unsigned long address)
++{
++ if (nr_ioapics >= MAX_IO_APICS) {
++ printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
++ "(found %d)\n", MAX_IO_APICS, nr_ioapics);
++ panic("Recompile kernel with bigger MAX_IO_APICS!\n");
++ }
++ if (!address) {
++ printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
++ " found in table, skipping!\n");
++ return 1;
++ }
++ return 0;
++}
++
+ static void __init MP_ioapic_info (struct mpc_config_ioapic *m)
+ {
+ if (!(m->mpc_flags & MPC_APIC_USABLE))
+ return;
+
+- printk("I/O APIC #%d Version %d at 0x%X.\n",
+- m->mpc_apicid, m->mpc_apicver, m->mpc_apicaddr);
+- if (nr_ioapics >= MAX_IO_APICS) {
+- printk(KERN_ERR "Max # of I/O APICs (%d) exceeded (found %d).\n",
+- MAX_IO_APICS, nr_ioapics);
+- panic("Recompile kernel with bigger MAX_IO_APICS!.\n");
+- }
+- if (!m->mpc_apicaddr) {
+- printk(KERN_ERR "WARNING: bogus zero I/O APIC address"
+- " found in MP table, skipping!\n");
++ printk("I/O APIC #%d at 0x%X.\n",
++ m->mpc_apicid, m->mpc_apicaddr);
++
++ if (bad_ioapic(m->mpc_apicaddr))
+ return;
+- }
++
+ mp_ioapics[nr_ioapics] = *m;
+ nr_ioapics++;
+ }
+@@ -239,19 +208,6 @@ static void __init MP_lintsrc_info (stru
+ m->mpc_irqtype, m->mpc_irqflag & 3,
+ (m->mpc_irqflag >> 2) &3, m->mpc_srcbusid,
+ m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
+- /*
+- * Well it seems all SMP boards in existence
+- * use ExtINT/LVT1 == LINT0 and
+- * NMI/LVT2 == LINT1 - the following check
+- * will show us if this assumptions is false.
+- * Until then we do not have to add baggage.
+- */
+- if ((m->mpc_irqtype == mp_ExtINT) &&
+- (m->mpc_destapiclint != 0))
+- BUG();
+- if ((m->mpc_irqtype == mp_NMI) &&
+- (m->mpc_destapiclint != 1))
+- BUG();
+ }
+
+ /*
+@@ -265,7 +221,7 @@ static int __init smp_read_mpc(struct mp
+ unsigned char *mpt=((unsigned char *)mpc)+count;
+
+ if (memcmp(mpc->mpc_signature,MPC_SIGNATURE,4)) {
+- printk("SMP mptable: bad signature [%c%c%c%c]!\n",
++ printk("MPTABLE: bad signature [%c%c%c%c]!\n",
+ mpc->mpc_signature[0],
+ mpc->mpc_signature[1],
+ mpc->mpc_signature[2],
+@@ -273,31 +229,31 @@ static int __init smp_read_mpc(struct mp
+ return 0;
+ }
+ if (mpf_checksum((unsigned char *)mpc,mpc->mpc_length)) {
+- printk("SMP mptable: checksum error!\n");
++ printk("MPTABLE: checksum error!\n");
+ return 0;
+ }
+ if (mpc->mpc_spec!=0x01 && mpc->mpc_spec!=0x04) {
+- printk(KERN_ERR "SMP mptable: bad table version (%d)!!\n",
++ printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
+ mpc->mpc_spec);
+ return 0;
+ }
+ if (!mpc->mpc_lapic) {
+- printk(KERN_ERR "SMP mptable: null local APIC address!\n");
++ printk(KERN_ERR "MPTABLE: null local APIC address!\n");
+ return 0;
+ }
+ memcpy(str,mpc->mpc_oem,8);
+- str[8]=0;
+- printk(KERN_INFO "OEM ID: %s ",str);
++ str[8] = 0;
++ printk(KERN_INFO "MPTABLE: OEM ID: %s ",str);
+
+ memcpy(str,mpc->mpc_productid,12);
+- str[12]=0;
+- printk("Product ID: %s ",str);
++ str[12] = 0;
++ printk("MPTABLE: Product ID: %s ",str);
+
+- printk("APIC at: 0x%X\n",mpc->mpc_lapic);
++ printk("MPTABLE: APIC at: 0x%X\n",mpc->mpc_lapic);
+
+ /* save the local APIC address, it might be non-default */
+ if (!acpi_lapic)
+- mp_lapic_addr = mpc->mpc_lapic;
++ mp_lapic_addr = mpc->mpc_lapic;
+
+ /*
+ * Now process the configuration blocks.
+@@ -309,7 +265,7 @@ static int __init smp_read_mpc(struct mp
+ struct mpc_config_processor *m=
+ (struct mpc_config_processor *)mpt;
+ if (!acpi_lapic)
+- MP_processor_info(m);
++ MP_processor_info(m);
+ mpt += sizeof(*m);
+ count += sizeof(*m);
+ break;
+@@ -328,8 +284,8 @@ static int __init smp_read_mpc(struct mp
+ struct mpc_config_ioapic *m=
+ (struct mpc_config_ioapic *)mpt;
+ MP_ioapic_info(m);
+- mpt+=sizeof(*m);
+- count+=sizeof(*m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
+ break;
+ }
+ case MP_INTSRC:
+@@ -338,8 +294,8 @@ static int __init smp_read_mpc(struct mp
+ (struct mpc_config_intsrc *)mpt;
+
+ MP_intsrc_info(m);
+- mpt+=sizeof(*m);
+- count+=sizeof(*m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
+ break;
+ }
+ case MP_LINTSRC:
+@@ -347,15 +303,15 @@ static int __init smp_read_mpc(struct mp
+ struct mpc_config_lintsrc *m=
+ (struct mpc_config_lintsrc *)mpt;
+ MP_lintsrc_info(m);
+- mpt+=sizeof(*m);
+- count+=sizeof(*m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
+ break;
+ }
+ }
+ }
+ clustered_apic_check();
+ if (!num_processors)
+- printk(KERN_ERR "SMP mptable: no processors registered!\n");
++ printk(KERN_ERR "MPTABLE: no processors registered!\n");
+ return num_processors;
+ }
+
+@@ -451,13 +407,10 @@ static inline void __init construct_defa
+ * 2 CPUs, numbered 0 & 1.
+ */
+ processor.mpc_type = MP_PROCESSOR;
+- /* Either an integrated APIC or a discrete 82489DX. */
+- processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ processor.mpc_apicver = 0;
+ processor.mpc_cpuflag = CPU_ENABLED;
+- processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
+- (boot_cpu_data.x86_model << 4) |
+- boot_cpu_data.x86_mask;
+- processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
++ processor.mpc_cpufeature = 0;
++ processor.mpc_featureflag = 0;
+ processor.mpc_reserved[0] = 0;
+ processor.mpc_reserved[1] = 0;
+ for (i = 0; i < 2; i++) {
+@@ -476,14 +429,6 @@ static inline void __init construct_defa
+ case 5:
+ memcpy(bus.mpc_bustype, "ISA ", 6);
+ break;
+- case 2:
+- case 6:
+- case 3:
+- memcpy(bus.mpc_bustype, "EISA ", 6);
+- break;
+- case 4:
+- case 7:
+- memcpy(bus.mpc_bustype, "MCA ", 6);
+ }
+ MP_bus_info(&bus);
+ if (mpc_default_type > 4) {
+@@ -494,7 +439,7 @@ static inline void __init construct_defa
+
+ ioapic.mpc_type = MP_IOAPIC;
+ ioapic.mpc_apicid = 2;
+- ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ ioapic.mpc_apicver = 0;
+ ioapic.mpc_flags = MPC_APIC_USABLE;
+ ioapic.mpc_apicaddr = 0xFEC00000;
+ MP_ioapic_info(&ioapic);
+@@ -537,13 +482,6 @@ void __init get_smp_config (void)
+ printk(KERN_INFO "Using ACPI for processor (LAPIC) configuration information\n");
+
+ printk("Intel MultiProcessor Specification v1.%d\n", mpf->mpf_specification);
+- if (mpf->mpf_feature2 & (1<<7)) {
+- printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
+- pic_mode = 1;
+- } else {
+- printk(KERN_INFO " Virtual Wire compatibility mode.\n");
+- pic_mode = 0;
+- }
+
+ /*
+ * Now see if we need to read further.
+@@ -620,7 +558,7 @@ static int __init smp_scan_config (unsig
+ return 0;
+ }
+
+-void __init find_intel_smp (void)
++void __init find_smp_config(void)
+ {
+ unsigned int address;
+
+@@ -637,9 +575,7 @@ void __init find_intel_smp (void)
+ smp_scan_config(0xF0000,0x10000))
+ return;
+ /*
+- * If it is an SMP machine we should know now, unless the
+- * configuration is in an EISA/MCA bus machine with an
+- * extended bios data area.
++ * If it is an SMP machine we should know now.
+ *
+ * there is a real-mode segmented pointer pointing to the
+ * 4K EBDA area at 0x40E, calculate and scan it here.
+@@ -660,64 +596,38 @@ void __init find_intel_smp (void)
+ printk(KERN_INFO "No mptable found.\n");
+ }
+
+-/*
+- * - Intel MP Configuration Table
+- */
+-void __init find_smp_config (void)
+-{
+-#ifdef CONFIG_X86_LOCAL_APIC
+- find_intel_smp();
+-#endif
+-}
+-
+-
+ /* --------------------------------------------------------------------------
+ ACPI-based MP Configuration
+ -------------------------------------------------------------------------- */
+
+ #ifdef CONFIG_ACPI
+
+-void __init mp_register_lapic_address (
+- u64 address)
++void __init mp_register_lapic_address(u64 address)
+ {
+ #ifndef CONFIG_XEN
+ mp_lapic_addr = (unsigned long) address;
+-
+ set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
+-
+ if (boot_cpu_id == -1U)
+ boot_cpu_id = GET_APIC_ID(apic_read(APIC_ID));
+-
+- Dprintk("Boot CPU = %d\n", boot_cpu_physical_apicid);
+ #endif
+ }
+
+-
+-void __cpuinit mp_register_lapic (
+- u8 id,
+- u8 enabled)
++void __cpuinit mp_register_lapic (u8 id, u8 enabled)
+ {
+ struct mpc_config_processor processor;
+ int boot_cpu = 0;
+
+- if (id >= MAX_APICS) {
+- printk(KERN_WARNING "Processor #%d invalid (max %d)\n",
+- id, MAX_APICS);
+- return;
+- }
+-
+- if (id == boot_cpu_physical_apicid)
++ if (id == boot_cpu_id)
+ boot_cpu = 1;
+
+ #ifndef CONFIG_XEN
+ processor.mpc_type = MP_PROCESSOR;
+ processor.mpc_apicid = id;
+- processor.mpc_apicver = GET_APIC_VERSION(apic_read(APIC_LVR));
++ processor.mpc_apicver = 0;
+ processor.mpc_cpuflag = (enabled ? CPU_ENABLED : 0);
+ processor.mpc_cpuflag |= (boot_cpu ? CPU_BOOTPROCESSOR : 0);
+- processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
+- (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
+- processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
++ processor.mpc_cpufeature = 0;
++ processor.mpc_featureflag = 0;
+ processor.mpc_reserved[0] = 0;
+ processor.mpc_reserved[1] = 0;
+ #endif
+@@ -725,8 +635,6 @@ void __cpuinit mp_register_lapic (
+ MP_processor_info(&processor);
+ }
+
+-#ifdef CONFIG_X86_IO_APIC
+-
+ #define MP_ISA_BUS 0
+ #define MP_MAX_IOAPIC_PIN 127
+
+@@ -737,11 +645,9 @@ static struct mp_ioapic_routing {
+ u32 pin_programmed[4];
+ } mp_ioapic_routing[MAX_IO_APICS];
+
+-
+-static int mp_find_ioapic (
+- int gsi)
++static int mp_find_ioapic(int gsi)
+ {
+- int i = 0;
++ int i = 0;
+
+ /* Find the IOAPIC that manages this GSI. */
+ for (i = 0; i < nr_ioapics; i++) {
+@@ -751,28 +657,15 @@ static int mp_find_ioapic (
+ }
+
+ printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
+-
+ return -1;
+ }
+-
+
+-void __init mp_register_ioapic (
+- u8 id,
+- u32 address,
+- u32 gsi_base)
++void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
+ {
+- int idx = 0;
++ int idx = 0;
+
+- if (nr_ioapics >= MAX_IO_APICS) {
+- printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
+- "(found %d)\n", MAX_IO_APICS, nr_ioapics);
+- panic("Recompile kernel with bigger MAX_IO_APICS!\n");
+- }
+- if (!address) {
+- printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
+- " found in MADT table, skipping!\n");
++ if (bad_ioapic(address))
+ return;
+- }
+
+ idx = nr_ioapics++;
+
+@@ -784,7 +677,7 @@ void __init mp_register_ioapic (
+ set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
+ #endif
+ mp_ioapics[idx].mpc_apicid = id;
+- mp_ioapics[idx].mpc_apicver = io_apic_get_version(idx);
++ mp_ioapics[idx].mpc_apicver = 0;
+
+ /*
+ * Build basic IRQ lookup table to facilitate gsi->io_apic lookups
+@@ -795,21 +688,15 @@ void __init mp_register_ioapic (
+ mp_ioapic_routing[idx].gsi_end = gsi_base +
+ io_apic_get_redir_entries(idx);
+
+- printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
++ printk(KERN_INFO "IOAPIC[%d]: apic_id %d, address 0x%x, "
+ "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
+- mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
++ mp_ioapics[idx].mpc_apicaddr,
+ mp_ioapic_routing[idx].gsi_start,
+ mp_ioapic_routing[idx].gsi_end);
+-
+- return;
+ }
+
+-
+-void __init mp_override_legacy_irq (
+- u8 bus_irq,
+- u8 polarity,
+- u8 trigger,
+- u32 gsi)
++void __init
++mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
+ {
+ struct mpc_config_intsrc intsrc;
+ int ioapic = -1;
+@@ -847,22 +734,18 @@ void __init mp_override_legacy_irq (
+ mp_irqs[mp_irq_entries] = intsrc;
+ if (++mp_irq_entries == MAX_IRQ_SOURCES)
+ panic("Max # of irq sources exceeded!\n");
+-
+- return;
+ }
+
+-
+-void __init mp_config_acpi_legacy_irqs (void)
++void __init mp_config_acpi_legacy_irqs(void)
+ {
+ struct mpc_config_intsrc intsrc;
+- int i = 0;
+- int ioapic = -1;
++ int i = 0;
++ int ioapic = -1;
+
+ /*
+ * Fabricate the legacy ISA bus (bus #31).
+ */
+- mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
+- Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
++ set_bit(MP_ISA_BUS, mp_bus_not_pci);
+
+ /*
+ * Locate the IOAPIC that manages the ISA IRQs (0-15).
+@@ -915,24 +798,13 @@ void __init mp_config_acpi_legacy_irqs (
+ if (++mp_irq_entries == MAX_IRQ_SOURCES)
+ panic("Max # of irq sources exceeded!\n");
+ }
+-
+- return;
+ }
+
+-#define MAX_GSI_NUM 4096
+-
+ int mp_register_gsi(u32 gsi, int triggering, int polarity)
+ {
+- int ioapic = -1;
+- int ioapic_pin = 0;
+- int idx, bit = 0;
+- static int pci_irq = 16;
+- /*
+- * Mapping between Global System Interrupts, which
+- * represent all possible interrupts, to the IRQs
+- * assigned to actual devices.
+- */
+- static int gsi_to_irq[MAX_GSI_NUM];
++ int ioapic = -1;
++ int ioapic_pin = 0;
++ int idx, bit = 0;
+
+ if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
+ return gsi;
+@@ -965,47 +837,14 @@ int mp_register_gsi(u32 gsi, int trigger
+ if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
+ Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
+ mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
+- return gsi_to_irq[gsi];
++ return gsi;
+ }
+
+ mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit);
+
+- if (triggering == ACPI_LEVEL_SENSITIVE) {
+- /*
+- * For PCI devices assign IRQs in order, avoiding gaps
+- * due to unused I/O APIC pins.
+- */
+- int irq = gsi;
+- if (gsi < MAX_GSI_NUM) {
+- /*
+- * Retain the VIA chipset work-around (gsi > 15), but
+- * avoid a problem where the 8254 timer (IRQ0) is setup
+- * via an override (so it's not on pin 0 of the ioapic),
+- * and at the same time, the pin 0 interrupt is a PCI
+- * type. The gsi > 15 test could cause these two pins
+- * to be shared as IRQ0, and they are not shareable.
+- * So test for this condition, and if necessary, avoid
+- * the pin collision.
+- */
+- if (gsi > 15 || (gsi == 0 && !timer_uses_ioapic_pin_0))
+- gsi = pci_irq++;
+- /*
+- * Don't assign IRQ used by ACPI SCI
+- */
+- if (gsi == acpi_fadt.sci_int)
+- gsi = pci_irq++;
+- gsi_to_irq[irq] = gsi;
+- } else {
+- printk(KERN_ERR "GSI %u is too high\n", gsi);
+- return gsi;
+- }
+- }
+-
+ io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
+ triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
+ polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
+ return gsi;
+ }
+-
+-#endif /*CONFIG_X86_IO_APIC*/
+ #endif /*CONFIG_ACPI*/
+Index: head-2008-12-01/arch/x86/kernel/process_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -89,25 +89,24 @@ void idle_notifier_unregister(struct not
+ }
+ EXPORT_SYMBOL(idle_notifier_unregister);
+
+-enum idle_state { CPU_IDLE, CPU_NOT_IDLE };
+-static DEFINE_PER_CPU(enum idle_state, idle_state) = CPU_NOT_IDLE;
+-
+ void enter_idle(void)
+ {
+- __get_cpu_var(idle_state) = CPU_IDLE;
++ write_pda(isidle, 1);
+ atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
+ }
+
+ static void __exit_idle(void)
+ {
+- __get_cpu_var(idle_state) = CPU_NOT_IDLE;
++ if (test_and_clear_bit_pda(0, isidle) == 0)
++ return;
+ atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
+ }
+
+ /* Called from interrupts to signify idle end */
+ void exit_idle(void)
+ {
+- if (current->pid | read_pda(irqcount))
++ /* idle loop has pid 0 */
++ if (current->pid)
+ return;
+ __exit_idle();
+ }
+@@ -184,6 +183,9 @@ void cpu_idle (void)
+ play_dead();
+ enter_idle();
+ idle();
++ /* In many cases the interrupt that ended idle
++ has already called exit_idle. But some idle
++ loops can be woken up without interrupt. */
+ __exit_idle();
+ }
+
+@@ -196,7 +198,7 @@ void cpu_idle (void)
+ void cpu_idle_wait(void)
+ {
+ unsigned int cpu, this_cpu = get_cpu();
+- cpumask_t map;
++ cpumask_t map, tmp = current->cpus_allowed;
+
+ set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
+ put_cpu();
+@@ -219,6 +221,8 @@ void cpu_idle_wait(void)
+ }
+ cpus_and(map, map, cpu_online_map);
+ } while (!cpus_empty(map));
++
++ set_cpus_allowed(current, tmp);
+ }
+ EXPORT_SYMBOL_GPL(cpu_idle_wait);
+
+@@ -250,9 +254,9 @@ void __show_regs(struct pt_regs * regs)
+ print_modules();
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+- system_utsname.release,
+- (int)strcspn(system_utsname.version, " "),
+- system_utsname.version);
++ init_utsname()->release,
++ (int)strcspn(init_utsname()->version, " "),
++ init_utsname()->version);
+ printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
+ printk_address(regs->rip);
+ printk("RSP: %04lx:%016lx EFLAGS: %08lx\n", regs->ss, regs->rsp,
+@@ -310,6 +314,7 @@ void exit_thread(void)
+
+ kfree(t->io_bitmap_ptr);
+ t->io_bitmap_ptr = NULL;
++ clear_thread_flag(TIF_IO_BITMAP);
+ /*
+ * Careful, clear this in the TSS too:
+ */
+@@ -340,6 +345,7 @@ void flush_thread(void)
+ if (t->flags & _TIF_IA32)
+ current_thread_info()->status |= TS_COMPAT;
+ }
++ t->flags &= ~_TIF_DEBUG;
+
+ tsk->thread.debugreg0 = 0;
+ tsk->thread.debugreg1 = 0;
+@@ -432,7 +438,7 @@ int copy_thread(int nr, unsigned long cl
+ asm("mov %%es,%0" : "=m" (p->thread.es));
+ asm("mov %%ds,%0" : "=m" (p->thread.ds));
+
+- if (unlikely(me->thread.io_bitmap_ptr != NULL)) {
++ if (unlikely(test_tsk_thread_flag(me, TIF_IO_BITMAP))) {
+ p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
+ if (!p->thread.io_bitmap_ptr) {
+ p->thread.io_bitmap_max = 0;
+@@ -440,6 +446,7 @@ int copy_thread(int nr, unsigned long cl
+ }
+ memcpy(p->thread.io_bitmap_ptr, me->thread.io_bitmap_ptr,
+ IO_BITMAP_BYTES);
++ set_tsk_thread_flag(p, TIF_IO_BITMAP);
+ }
+
+ /*
+@@ -474,6 +481,30 @@ static inline void __save_init_fpu( stru
+ }
+
+ /*
++ * This special macro can be used to load a debugging register
++ */
++#define loaddebug(thread,r) set_debugreg(thread->debugreg ## r, r)
++
++static inline void __switch_to_xtra(struct task_struct *prev_p,
++ struct task_struct *next_p)
++{
++ struct thread_struct *prev, *next;
++
++ prev = &prev_p->thread,
++ next = &next_p->thread;
++
++ if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
++ loaddebug(next, 0);
++ loaddebug(next, 1);
++ loaddebug(next, 2);
++ loaddebug(next, 3);
++ /* no 4 and 5 */
++ loaddebug(next, 6);
++ loaddebug(next, 7);
++ }
++}
++
++/*
+ * switch_to(x,y) should switch tasks from x to y.
+ *
+ * This could still be optimized:
+@@ -501,6 +532,10 @@ __switch_to(struct task_struct *prev_p,
+ #endif
+ multicall_entry_t _mcl[8], *mcl = _mcl;
+
++ /* we're going to use this soon, after a few expensive things */
++ if (next_p->fpu_counter>5)
++ prefetch(&next->i387.fxsave);
++
+ /*
+ * This is basically '__unlazy_fpu', except that we queue a
+ * multicall to indicate FPU task switch, rather than
+@@ -513,7 +548,8 @@ __switch_to(struct task_struct *prev_p,
+ mcl->op = __HYPERVISOR_fpu_taskswitch;
+ mcl->args[0] = 1;
+ mcl++;
+- }
++ } else
++ prev_p->fpu_counter = 0;
+
+ /*
+ * Reload esp0, LDT and the page table pointer:
+@@ -608,21 +644,29 @@ __switch_to(struct task_struct *prev_p,
+ write_pda(oldrsp, next->userrsp);
+ write_pda(pcurrent, next_p);
+ write_pda(kernelstack,
+- task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET);
++ (unsigned long)task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET);
++#ifdef CONFIG_CC_STACKPROTECTOR
++ write_pda(stack_canary, next_p->stack_canary);
++
++ /*
++ * Build time only check to make sure the stack_canary is at
++ * offset 40 in the pda; this is a gcc ABI requirement
++ */
++ BUILD_BUG_ON(offsetof(struct x8664_pda, stack_canary) != 40);
++#endif
+
+ /*
+ * Now maybe reload the debug registers
+ */
+- if (unlikely(next->debugreg7)) {
+- set_debugreg(next->debugreg0, 0);
+- set_debugreg(next->debugreg1, 1);
+- set_debugreg(next->debugreg2, 2);
+- set_debugreg(next->debugreg3, 3);
+- /* no 4 and 5 */
+- set_debugreg(next->debugreg6, 6);
+- set_debugreg(next->debugreg7, 7);
+- }
++ if (unlikely(task_thread_info(next_p)->flags & _TIF_WORK_CTXSW))
++ __switch_to_xtra(prev_p, next_p);
+
++ /* If the task has used fpu the last 5 timeslices, just do a full
++ * restore of the math state immediately to avoid the trap; the
++ * chances of needing FPU soon are obviously high now
++ */
++ if (next_p->fpu_counter>5)
++ math_state_restore();
+ return prev_p;
+ }
+
+@@ -842,7 +886,7 @@ int dump_task_regs(struct task_struct *t
+
+ unsigned long arch_align_stack(unsigned long sp)
+ {
+- if (randomize_va_space)
++ if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+ sp -= get_random_int() % 8192;
+ return sp & ~0xf;
+ }
+Index: head-2008-12-01/arch/x86/kernel/setup_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -88,9 +88,6 @@ extern struct edid_info edid_info;
+ shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
+ EXPORT_SYMBOL(HYPERVISOR_shared_info);
+
+-extern char hypercall_page[PAGE_SIZE];
+-EXPORT_SYMBOL(hypercall_page);
+-
+ static int xen_panic_event(struct notifier_block *, unsigned long, void *);
+ static struct notifier_block xen_panic_block = {
+ xen_panic_event, NULL, 0 /* try to go last */
+@@ -118,16 +115,6 @@ EXPORT_SYMBOL(boot_cpu_data);
+
+ unsigned long mmu_cr4_features;
+
+-int acpi_disabled;
+-EXPORT_SYMBOL(acpi_disabled);
+-#ifdef CONFIG_ACPI
+-extern int __initdata acpi_ht;
+-extern acpi_interrupt_flags acpi_sci_flags;
+-int __initdata acpi_force = 0;
+-#endif
+-
+-int acpi_numa __initdata;
+-
+ /* Boot loader ID as an integer, for the benefit of proc_dointvec */
+ int bootloader_type;
+
+@@ -151,10 +138,6 @@ struct sys_desc_table_struct {
+
+ struct edid_info edid_info;
+ EXPORT_SYMBOL_GPL(edid_info);
+-struct e820map e820;
+-#ifdef CONFIG_XEN
+-struct e820map machine_e820;
+-#endif
+
+ extern int root_mountflags;
+
+@@ -181,9 +164,6 @@ struct resource standard_io_resources[]
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO }
+ };
+
+-#define STANDARD_IO_RESOURCES \
+- (sizeof standard_io_resources / sizeof standard_io_resources[0])
+-
+ #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
+
+ struct resource data_resource = {
+@@ -230,9 +210,6 @@ static struct resource adapter_rom_resou
+ .flags = IORESOURCE_ROM }
+ };
+
+-#define ADAPTER_ROM_RESOURCES \
+- (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
+-
+ static struct resource video_rom_resource = {
+ .name = "Video ROM",
+ .start = 0xc0000,
+@@ -309,7 +286,8 @@ static void __init probe_roms(void)
+ }
+
+ /* check for adapter roms on 2k boundaries */
+- for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
++ for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper;
++ start += 2048) {
+ rom = isa_bus_to_virt(start);
+ if (!romsignature(rom))
+ continue;
+@@ -329,187 +307,22 @@ static void __init probe_roms(void)
+ }
+ }
+
+-/* Check for full argument with no trailing characters */
+-static int fullarg(char *p, char *arg)
++#ifdef CONFIG_PROC_VMCORE
++/* elfcorehdr= specifies the location of elf core header
++ * stored by the crashed kernel. This option will be passed
++ * by kexec loader to the capture kernel.
++ */
++static int __init setup_elfcorehdr(char *arg)
+ {
+- int l = strlen(arg);
+- return !memcmp(p, arg, l) && (p[l] == 0 || isspace(p[l]));
++ char *end;
++ if (!arg)
++ return -EINVAL;
++ elfcorehdr_addr = memparse(arg, &end);
++ return end > arg ? 0 : -EINVAL;
+ }
+-
+-static __init void parse_cmdline_early (char ** cmdline_p)
+-{
+- char c = ' ', *to = command_line, *from = COMMAND_LINE;
+- int len = 0;
+- int userdef = 0;
+-
+- for (;;) {
+- if (c != ' ')
+- goto next_char;
+-
+-#ifdef CONFIG_SMP
+- /*
+- * If the BIOS enumerates physical processors before logical,
+- * maxcpus=N at enumeration-time can be used to disable HT.
+- */
+- else if (!memcmp(from, "maxcpus=", 8)) {
+- extern unsigned int maxcpus;
+-
+- maxcpus = simple_strtoul(from + 8, NULL, 0);
+- }
+-#endif
+-#ifdef CONFIG_ACPI
+- /* "acpi=off" disables both ACPI table parsing and interpreter init */
+- if (fullarg(from,"acpi=off"))
+- disable_acpi();
+-
+- if (fullarg(from, "acpi=force")) {
+- /* add later when we do DMI horrors: */
+- acpi_force = 1;
+- acpi_disabled = 0;
+- }
+-
+- /* acpi=ht just means: do ACPI MADT parsing
+- at bootup, but don't enable the full ACPI interpreter */
+- if (fullarg(from, "acpi=ht")) {
+- if (!acpi_force)
+- disable_acpi();
+- acpi_ht = 1;
+- }
+- else if (fullarg(from, "pci=noacpi"))
+- acpi_disable_pci();
+- else if (fullarg(from, "acpi=noirq"))
+- acpi_noirq_set();
+-
+- else if (fullarg(from, "acpi_sci=edge"))
+- acpi_sci_flags.trigger = 1;
+- else if (fullarg(from, "acpi_sci=level"))
+- acpi_sci_flags.trigger = 3;
+- else if (fullarg(from, "acpi_sci=high"))
+- acpi_sci_flags.polarity = 1;
+- else if (fullarg(from, "acpi_sci=low"))
+- acpi_sci_flags.polarity = 3;
+-
+- /* acpi=strict disables out-of-spec workarounds */
+- else if (fullarg(from, "acpi=strict")) {
+- acpi_strict = 1;
+- }
+-#ifdef CONFIG_X86_IO_APIC
+- else if (fullarg(from, "acpi_skip_timer_override"))
+- acpi_skip_timer_override = 1;
+-#endif
+-#endif
+-
+-#ifndef CONFIG_XEN
+- if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) {
+- clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
+- disable_apic = 1;
+- }
+-
+- if (fullarg(from, "noapic"))
+- skip_ioapic_setup = 1;
+-
+- if (fullarg(from,"apic")) {
+- skip_ioapic_setup = 0;
+- ioapic_force = 1;
+- }
+-#endif
+-
+- if (!memcmp(from, "mem=", 4))
+- parse_memopt(from+4, &from);
+-
+- if (!memcmp(from, "memmap=", 7)) {
+- /* exactmap option is for used defined memory */
+- if (!memcmp(from+7, "exactmap", 8)) {
+-#ifdef CONFIG_CRASH_DUMP
+- /* If we are doing a crash dump, we
+- * still need to know the real mem
+- * size before original memory map is
+- * reset.
+- */
+- saved_max_pfn = e820_end_of_ram();
+-#endif
+- from += 8+7;
+- end_pfn_map = 0;
+- e820.nr_map = 0;
+- userdef = 1;
+- }
+- else {
+- parse_memmapopt(from+7, &from);
+- userdef = 1;
+- }
+- }
+-
+-#ifdef CONFIG_NUMA
+- if (!memcmp(from, "numa=", 5))
+- numa_setup(from+5);
++early_param("elfcorehdr", setup_elfcorehdr);
+ #endif
+
+- if (!memcmp(from,"iommu=",6)) {
+- iommu_setup(from+6);
+- }
+-
+- if (fullarg(from,"oops=panic"))
+- panic_on_oops = 1;
+-
+- if (!memcmp(from, "noexec=", 7))
+- nonx_setup(from + 7);
+-
+-#ifdef CONFIG_KEXEC
+- /* crashkernel=size@addr specifies the location to reserve for
+- * a crash kernel. By reserving this memory we guarantee
+- * that linux never set's it up as a DMA target.
+- * Useful for holding code to do something appropriate
+- * after a kernel panic.
+- */
+- else if (!memcmp(from, "crashkernel=", 12)) {
+-#ifndef CONFIG_XEN
+- unsigned long size, base;
+- size = memparse(from+12, &from);
+- if (*from == '@') {
+- base = memparse(from+1, &from);
+- /* FIXME: Do I want a sanity check
+- * to validate the memory range?
+- */
+- crashk_res.start = base;
+- crashk_res.end = base + size - 1;
+- }
+-#else
+- printk("Ignoring crashkernel command line, "
+- "parameter will be supplied by xen\n");
+-#endif
+- }
+-#endif
+-
+-#ifdef CONFIG_PROC_VMCORE
+- /* elfcorehdr= specifies the location of elf core header
+- * stored by the crashed kernel. This option will be passed
+- * by kexec loader to the capture kernel.
+- */
+- else if(!memcmp(from, "elfcorehdr=", 11))
+- elfcorehdr_addr = memparse(from+11, &from);
+-#endif
+-
+-#if defined(CONFIG_HOTPLUG_CPU) && !defined(CONFIG_XEN)
+- else if (!memcmp(from, "additional_cpus=", 16))
+- setup_additional_cpus(from+16);
+-#endif
+-
+- next_char:
+- c = *(from++);
+- if (!c)
+- break;
+- if (COMMAND_LINE_SIZE <= ++len)
+- break;
+- *(to++) = c;
+- }
+- if (userdef) {
+- printk(KERN_INFO "user-defined physical RAM map:\n");
+- e820_print_map("user");
+- }
+- *to = '\0';
+- *cmdline_p = command_line;
+-}
+-
+ #ifndef CONFIG_NUMA
+ static void __init
+ contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
+@@ -521,10 +334,11 @@ contig_initmem_init(unsigned long start_
+ if (bootmap == -1L)
+ panic("Cannot find bootmem map of size %ld\n",bootmap_size);
+ bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
++ e820_register_active_regions(0, start_pfn, end_pfn);
+ #ifdef CONFIG_XEN
+- e820_bootmem_free(NODE_DATA(0), 0, xen_start_info->nr_pages<<PAGE_SHIFT);
++ free_bootmem_with_active_regions(0, xen_start_info->nr_pages);
+ #else
+- e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
++ free_bootmem_with_active_regions(0, end_pfn);
+ #endif
+ reserve_bootmem(bootmap, bootmap_size);
+ }
+@@ -587,6 +401,10 @@ static void discover_ebda(void)
+ void __init setup_arch(char **cmdline_p)
+ {
+ #ifdef CONFIG_XEN
++ extern struct e820map machine_e820;
++
++ printk(KERN_INFO "Command line: %s\n", saved_command_line);
++
+ /* Register a call for panic conditions. */
+ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+
+@@ -612,6 +430,8 @@ void __init setup_arch(char **cmdline_p)
+
+ ARCH_SETUP
+ #else
++ printk(KERN_INFO "Command line: %s\n", saved_command_line);
++
+ ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
+ screen_info = SCREEN_INFO;
+ edid_info = EDID_INFO;
+@@ -639,16 +459,22 @@ void __init setup_arch(char **cmdline_p)
+ data_resource.start = virt_to_phys(&_etext);
+ data_resource.end = virt_to_phys(&_edata)-1;
+
+- parse_cmdline_early(cmdline_p);
+-
+ early_identify_cpu(&boot_cpu_data);
+
++ strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
++ *cmdline_p = command_line;
++
++ parse_early_param();
++
++ finish_e820_parsing();
++
++ e820_register_active_regions(0, 0, -1UL);
+ /*
+ * partially used pages are not usable - thus
+ * we are rounding upwards:
+ */
+ end_pfn = e820_end_of_ram();
+- num_physpages = end_pfn; /* for pfn_valid */
++ num_physpages = end_pfn;
+
+ check_efer();
+
+@@ -659,6 +485,14 @@ void __init setup_arch(char **cmdline_p)
+ if (is_initial_xendomain())
+ dmi_scan_machine();
+
++ /* How many end-of-memory variables you have, grandma! */
++ max_low_pfn = end_pfn;
++ max_pfn = end_pfn;
++ high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
++
++ /* Remove active ranges so rediscovery with NUMA-awareness happens */
++ remove_all_active_ranges();
++
+ #ifdef CONFIG_ACPI_NUMA
+ /*
+ * Parse SRAT to discover nodes.
+@@ -848,16 +682,16 @@ void __init setup_arch(char **cmdline_p)
+ BUG();
+ }
+
++#ifdef CONFIG_ACPI
+ if (!is_initial_xendomain()) {
+ acpi_disabled = 1;
+-#ifdef CONFIG_ACPI
+ acpi_ht = 0;
+-#endif
+ }
+ #endif
++#endif
+
+-#ifndef CONFIG_XEN
+- check_ioapic();
++#if defined(CONFIG_PCI) && !defined(CONFIG_XEN)
++ early_quirks();
+ #endif
+
+ zap_low_mappings(0);
+@@ -907,6 +741,7 @@ void __init setup_arch(char **cmdline_p)
+ e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
+ #else
+ e820_reserve_resources(e820.map, e820.nr_map);
++ e820_mark_nosave_regions();
+ #endif
+
+ request_resource(&iomem_resource, &video_ram_resource);
+@@ -914,7 +749,7 @@ void __init setup_arch(char **cmdline_p)
+ {
+ unsigned i;
+ /* request I/O space for devices used on all i[345]86 PCs */
+- for (i = 0; i < STANDARD_IO_RESOURCES; i++)
++ for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+ request_resource(&ioport_resource, &standard_io_resources[i]);
+ }
+
+@@ -1098,7 +933,7 @@ static void __init amd_detect_cmp(struct
+ #endif
+ }
+
+-static void __init init_amd(struct cpuinfo_x86 *c)
++static void __cpuinit init_amd(struct cpuinfo_x86 *c)
+ {
+ unsigned level;
+
+@@ -1154,6 +989,12 @@ static void __init init_amd(struct cpuin
+
+ /* Fix cpuid4 emulation for more */
+ num_cache_leaves = 3;
++
++ /* When there is only one core no need to synchronize RDTSC */
++ if (num_possible_cpus() == 1)
++ set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
++ else
++ clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
+ }
+
+ static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
+@@ -1235,8 +1076,7 @@ static void srat_detect_node(void)
+ node = first_node(node_online_map);
+ numa_set_node(cpu, node);
+
+- if (acpi_numa > 0)
+- printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
++ printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
+ #endif
+ }
+
+@@ -1270,6 +1110,8 @@ static void __cpuinit init_intel(struct
+ if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
+ (c->x86 == 0x6 && c->x86_model >= 0x0e))
+ set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
++ if (c->x86 == 6)
++ set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
+ set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
+ c->x86_max_cores = intel_num_cpu_cores(c);
+
+@@ -1488,8 +1330,8 @@ static int show_cpuinfo(struct seq_file
+
+ /* Intel-defined (#2) */
+ "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
+- "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ "tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
++ NULL, NULL, "dca", NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* VIA/Cyrix/Centaur-defined */
+Index: head-2008-12-01/arch/x86/kernel/setup64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -31,7 +31,7 @@
+ #include <asm/hypervisor.h>
+ #endif
+
+-char x86_boot_params[BOOT_PARAM_SIZE] __initdata = {0,};
++char x86_boot_params[BOOT_PARAM_SIZE] __initdata;
+
+ cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
+
+@@ -55,8 +55,10 @@ Control non executable mappings for 64bi
+ on Enable(default)
+ off Disable
+ */
+-int __init nonx_setup(char *str)
++static int __init nonx_setup(char *str)
+ {
++ if (!str)
++ return -EINVAL;
+ if (!strncmp(str, "on", 2)) {
+ __supported_pte_mask |= _PAGE_NX;
+ do_not_nx = 0;
+@@ -64,9 +66,9 @@ int __init nonx_setup(char *str)
+ do_not_nx = 1;
+ __supported_pte_mask &= ~_PAGE_NX;
+ }
+- return 1;
++ return 0;
+ }
+-__setup("noexec=", nonx_setup); /* parsed early actually */
++early_param("noexec", nonx_setup);
+
+ int force_personality32 = 0;
+
+@@ -102,12 +104,9 @@ void __init setup_per_cpu_areas(void)
+ #endif
+
+ /* Copy section for each CPU (we discard the original) */
+- size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
+-#ifdef CONFIG_MODULES
+- if (size < PERCPU_ENOUGH_ROOM)
+- size = PERCPU_ENOUGH_ROOM;
+-#endif
++ size = PERCPU_ENOUGH_ROOM;
+
++ printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n", size);
+ for_each_cpu_mask (i, cpu_possible_map) {
+ char *ptr;
+
+@@ -169,7 +168,10 @@ void pda_init(int cpu)
+ /* Setup up data that may be needed in __get_free_pages early */
+ asm volatile("movl %0,%%fs ; movl %0,%%gs" :: "r" (0));
+ #ifndef CONFIG_XEN
++ /* Memory clobbers used to order PDA accessed */
++ mb();
+ wrmsrl(MSR_GS_BASE, pda);
++ mb();
+ #else
+ if (HYPERVISOR_set_segment_base(SEGBASE_GS_KERNEL,
+ (unsigned long)pda))
+@@ -302,28 +304,17 @@ void __cpuinit cpu_init (void)
+ * set up and load the per-CPU TSS
+ */
+ for (v = 0; v < N_EXCEPTION_STACKS; v++) {
++ static const unsigned int order[N_EXCEPTION_STACKS] = {
++ [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
++ [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
++ };
+ if (cpu) {
+- static const unsigned int order[N_EXCEPTION_STACKS] = {
+- [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
+- [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
+- };
+-
+ estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
+ if (!estacks)
+ panic("Cannot allocate exception stack %ld %d\n",
+ v, cpu);
+ }
+- switch (v + 1) {
+-#if DEBUG_STKSZ > EXCEPTION_STKSZ
+- case DEBUG_STACK:
+- cpu_pda(cpu)->debugstack = (unsigned long)estacks;
+- estacks += DEBUG_STKSZ;
+- break;
+-#endif
+- default:
+- estacks += EXCEPTION_STKSZ;
+- break;
+- }
++ estacks += PAGE_SIZE << order[v];
+ orig_ist->ist[v] = t->ist[v] = (unsigned long)estacks;
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/smp_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -381,9 +381,8 @@ int smp_call_function_single (int cpu, v
+ /* prevent preemption and reschedule on another processor */
+ int me = get_cpu();
+ if (cpu == me) {
+- WARN_ON(1);
+ put_cpu();
+- return -EBUSY;
++ return 0;
+ }
+ spin_lock_bh(&call_lock);
+ __smp_call_function_single(cpu, func, info, nonatomic, wait);
+@@ -501,7 +500,7 @@ void smp_send_stop(void)
+ #ifndef CONFIG_XEN
+ asmlinkage void smp_reschedule_interrupt(void)
+ #else
+-asmlinkage irqreturn_t smp_reschedule_interrupt(void)
++asmlinkage irqreturn_t smp_reschedule_interrupt(int irq, void *ctx)
+ #endif
+ {
+ #ifndef CONFIG_XEN
+@@ -514,7 +513,7 @@ asmlinkage irqreturn_t smp_reschedule_in
+ #ifndef CONFIG_XEN
+ asmlinkage void smp_call_function_interrupt(void)
+ #else
+-asmlinkage irqreturn_t smp_call_function_interrupt(void)
++asmlinkage irqreturn_t smp_call_function_interrupt(int irq, void *ctx)
+ #endif
+ {
+ void (*func) (void *info) = call_data->func;
+@@ -545,31 +544,3 @@ asmlinkage irqreturn_t smp_call_function
+ return IRQ_HANDLED;
+ #endif
+ }
+-
+-int safe_smp_processor_id(void)
+-{
+-#ifdef CONFIG_XEN
+- return smp_processor_id();
+-#else
+- unsigned apicid, i;
+-
+- if (disable_apic)
+- return 0;
+-
+- apicid = hard_smp_processor_id();
+- if (apicid < NR_CPUS && x86_cpu_to_apicid[apicid] == apicid)
+- return apicid;
+-
+- for (i = 0; i < NR_CPUS; ++i) {
+- if (x86_cpu_to_apicid[i] == apicid)
+- return i;
+- }
+-
+- /* No entries in x86_cpu_to_apicid? Either no MPS|ACPI,
+- * or called too early. Either way, we must be CPU 0. */
+- if (x86_cpu_to_apicid[0] == BAD_APICID)
+- return 0;
+-
+- return 0; /* Should not happen */
+-#endif
+-}
+Index: head-2008-12-01/arch/x86/kernel/traps_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -23,6 +23,7 @@
+ #include <linux/delay.h>
+ #include <linux/spinlock.h>
+ #include <linux/interrupt.h>
++#include <linux/kallsyms.h>
+ #include <linux/module.h>
+ #include <linux/moduleparam.h>
+ #include <linux/nmi.h>
+@@ -45,6 +46,7 @@
+ #include <asm/pda.h>
+ #include <asm/proto.h>
+ #include <asm/nmi.h>
++#include <asm/stacktrace.h>
+
+ asmlinkage void divide_error(void);
+ asmlinkage void debug(void);
+@@ -114,7 +116,6 @@ static int call_trace = 1;
+ #endif
+
+ #ifdef CONFIG_KALLSYMS
+-# include <linux/kallsyms.h>
+ void printk_address(unsigned long address)
+ {
+ unsigned long offset = 0, symsize;
+@@ -142,7 +143,7 @@ void printk_address(unsigned long addres
+ #endif
+
+ static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
+- unsigned *usedp, const char **idp)
++ unsigned *usedp, char **idp)
+ {
+ #ifndef CONFIG_X86_NO_TSS
+ static char ids[][8] = {
+@@ -162,26 +163,7 @@ static unsigned long *in_exception_stack
+ * 'stack' is in one of them:
+ */
+ for (k = 0; k < N_EXCEPTION_STACKS; k++) {
+- unsigned long end;
+-
+- /*
+- * set 'end' to the end of the exception stack.
+- */
+- switch (k + 1) {
+- /*
+- * TODO: this block is not needed i think, because
+- * setup64.c:cpu_init() sets up t->ist[DEBUG_STACK]
+- * properly too.
+- */
+-#if DEBUG_STKSZ > EXCEPTION_STKSZ
+- case DEBUG_STACK:
+- end = cpu_pda(cpu)->debugstack + DEBUG_STKSZ;
+- break;
+-#endif
+- default:
+- end = per_cpu(orig_ist, cpu).ist[k];
+- break;
+- }
++ unsigned long end = per_cpu(orig_ist, cpu).ist[k];
+ /*
+ * Is 'stack' above this exception frame's end?
+ * If yes then skip to the next frame.
+@@ -236,13 +218,19 @@ static unsigned long *in_exception_stack
+ return NULL;
+ }
+
+-static int show_trace_unwind(struct unwind_frame_info *info, void *context)
++struct ops_and_data {
++ struct stacktrace_ops *ops;
++ void *data;
++};
++
++static int dump_trace_unwind(struct unwind_frame_info *info, void *context)
+ {
++ struct ops_and_data *oad = (struct ops_and_data *)context;
+ int n = 0;
+
+ while (unwind(info) == 0 && UNW_PC(info)) {
+ n++;
+- printk_address(UNW_PC(info));
++ oad->ops->address(oad->data, UNW_PC(info));
+ if (arch_unw_user_mode(info))
+ break;
+ }
+@@ -256,13 +244,19 @@ static int show_trace_unwind(struct unwi
+ * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
+ */
+
+-void show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * stack)
++static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
+ {
+- const unsigned cpu = safe_smp_processor_id();
++ void *t = (void *)tinfo;
++ return p > t && p < t + THREAD_SIZE - 3;
++}
++
++void dump_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * stack,
++ struct stacktrace_ops *ops, void *data)
++{
++ const unsigned cpu = smp_processor_id();
+ unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
+ unsigned used = 0;
+-
+- printk("\nCall Trace:\n");
++ struct thread_info *tinfo;
+
+ if (!tsk)
+ tsk = current;
+@@ -270,32 +264,47 @@ void show_trace(struct task_struct *tsk,
+ if (call_trace >= 0) {
+ int unw_ret = 0;
+ struct unwind_frame_info info;
++ struct ops_and_data oad = { .ops = ops, .data = data };
+
+ if (regs) {
+ if (unwind_init_frame_info(&info, tsk, regs) == 0)
+- unw_ret = show_trace_unwind(&info, NULL);
++ unw_ret = dump_trace_unwind(&info, &oad);
+ } else if (tsk == current)
+- unw_ret = unwind_init_running(&info, show_trace_unwind, NULL);
++ unw_ret = unwind_init_running(&info, dump_trace_unwind, &oad);
+ else {
+ if (unwind_init_blocked(&info, tsk) == 0)
+- unw_ret = show_trace_unwind(&info, NULL);
++ unw_ret = dump_trace_unwind(&info, &oad);
+ }
+ if (unw_ret > 0) {
+ if (call_trace == 1 && !arch_unw_user_mode(&info)) {
+- print_symbol("DWARF2 unwinder stuck at %s\n",
++ ops->warning_symbol(data, "DWARF2 unwinder stuck at %s\n",
+ UNW_PC(&info));
+ if ((long)UNW_SP(&info) < 0) {
+- printk("Leftover inexact backtrace:\n");
++ ops->warning(data, "Leftover inexact backtrace:\n");
+ stack = (unsigned long *)UNW_SP(&info);
++ if (!stack)
++ return;
+ } else
+- printk("Full inexact backtrace again:\n");
++ ops->warning(data, "Full inexact backtrace again:\n");
+ } else if (call_trace >= 1)
+ return;
+ else
+- printk("Full inexact backtrace again:\n");
++ ops->warning(data, "Full inexact backtrace again:\n");
+ } else
+- printk("Inexact backtrace:\n");
++ ops->warning(data, "Inexact backtrace:\n");
+ }
++ if (!stack) {
++ unsigned long dummy;
++ stack = &dummy;
++ if (tsk && tsk != current)
++ stack = (unsigned long *)tsk->thread.rsp;
++ }
++ /*
++ * Align the stack pointer on word boundary, later loops
++ * rely on that (and corruption / debug info bugs can cause
++ * unaligned values here):
++ */
++ stack = (unsigned long *)((unsigned long)stack & ~(sizeof(long)-1));
+
+ /*
+ * Print function call entries within a stack. 'cond' is the
+@@ -305,7 +314,9 @@ void show_trace(struct task_struct *tsk,
+ #define HANDLE_STACK(cond) \
+ do while (cond) { \
+ unsigned long addr = *stack++; \
+- if (kernel_text_address(addr)) { \
++ if (oops_in_progress ? \
++ __kernel_text_address(addr) : \
++ kernel_text_address(addr)) { \
+ /* \
+ * If the address is either in the text segment of the \
+ * kernel, or in the region which contains vmalloc'ed \
+@@ -314,7 +325,7 @@ void show_trace(struct task_struct *tsk,
+ * down the cause of the crash will be able to figure \
+ * out the call path that was taken. \
+ */ \
+- printk_address(addr); \
++ ops->address(data, addr); \
+ } \
+ } while (0)
+
+@@ -323,16 +334,17 @@ void show_trace(struct task_struct *tsk,
+ * current stack address. If the stacks consist of nested
+ * exceptions
+ */
+- for ( ; ; ) {
+- const char *id;
++ for (;;) {
++ char *id;
+ unsigned long *estack_end;
+ estack_end = in_exception_stack(cpu, (unsigned long)stack,
+ &used, &id);
+
+ if (estack_end) {
+- printk(" <%s>", id);
++ if (ops->stack(data, id) < 0)
++ break;
+ HANDLE_STACK (stack < estack_end);
+- printk(" <EOE>");
++ ops->stack(data, "<EOE>");
+ /*
+ * We link to the next stack via the
+ * second-to-last pointer (index -2 to end) in the
+@@ -347,7 +359,8 @@ void show_trace(struct task_struct *tsk,
+ (IRQSTACKSIZE - 64) / sizeof(*irqstack);
+
+ if (stack >= irqstack && stack < irqstack_end) {
+- printk(" <IRQ>");
++ if (ops->stack(data, "IRQ") < 0)
++ break;
+ HANDLE_STACK (stack < irqstack_end);
+ /*
+ * We link to the next stack (which would be
+@@ -356,7 +369,7 @@ void show_trace(struct task_struct *tsk,
+ */
+ stack = (unsigned long *) (irqstack_end[-1]);
+ irqstack_end = NULL;
+- printk(" <EOI>");
++ ops->stack(data, "EOI");
+ continue;
+ }
+ }
+@@ -364,19 +377,58 @@ void show_trace(struct task_struct *tsk,
+ }
+
+ /*
+- * This prints the process stack:
++ * This handles the process stack:
+ */
+- HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
++ tinfo = current_thread_info();
++ HANDLE_STACK (valid_stack_ptr(tinfo, stack));
+ #undef HANDLE_STACK
++}
++EXPORT_SYMBOL(dump_trace);
+
++static void
++print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
++{
++ print_symbol(msg, symbol);
+ printk("\n");
+ }
+
+-static void _show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long * rsp)
++static void print_trace_warning(void *data, char *msg)
++{
++ printk("%s\n", msg);
++}
++
++static int print_trace_stack(void *data, char *name)
++{
++ printk(" <%s> ", name);
++ return 0;
++}
++
++static void print_trace_address(void *data, unsigned long addr)
++{
++ printk_address(addr);
++}
++
++static struct stacktrace_ops print_trace_ops = {
++ .warning = print_trace_warning,
++ .warning_symbol = print_trace_warning_symbol,
++ .stack = print_trace_stack,
++ .address = print_trace_address,
++};
++
++void
++show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long *stack)
++{
++ printk("\nCall Trace:\n");
++ dump_trace(tsk, regs, stack, &print_trace_ops, NULL);
++ printk("\n");
++}
++
++static void
++_show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *rsp)
+ {
+ unsigned long *stack;
+ int i;
+- const int cpu = safe_smp_processor_id();
++ const int cpu = smp_processor_id();
+ unsigned long *irqstack_end = (unsigned long *) (cpu_pda(cpu)->irqstackptr);
+ unsigned long *irqstack = (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
+
+@@ -430,7 +482,7 @@ void show_registers(struct pt_regs *regs
+ int i;
+ int in_kernel = !user_mode(regs);
+ unsigned long rsp;
+- const int cpu = safe_smp_processor_id();
++ const int cpu = smp_processor_id();
+ struct task_struct *cur = cpu_pda(cpu)->pcurrent;
+
+ rsp = regs->rsp;
+@@ -505,9 +557,11 @@ static unsigned int die_nest_count;
+
+ unsigned __kprobes long oops_begin(void)
+ {
+- int cpu = safe_smp_processor_id();
++ int cpu = smp_processor_id();
+ unsigned long flags;
+
++ oops_enter();
++
+ /* racy, but better than risking deadlock. */
+ local_irq_save(flags);
+ if (!spin_trylock(&die_lock)) {
+@@ -536,6 +590,7 @@ void __kprobes oops_end(unsigned long fl
+ spin_unlock_irqrestore(&die_lock, flags);
+ if (panic_on_oops)
+ panic("Fatal exception");
++ oops_exit();
+ }
+
+ void __kprobes __die(const char * str, struct pt_regs * regs, long err)
+@@ -572,8 +627,8 @@ void die(const char * str, struct pt_reg
+ do_exit(SIGSEGV);
+ }
+
+-#ifdef CONFIG_X86_LOCAL_APIC
+-void __kprobes die_nmi(char *str, struct pt_regs *regs)
++#if defined(CONFIG_X86_LOCAL_APIC) || defined(CONFIG_SYSCTL)
++void __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
+ {
+ unsigned long flags = oops_begin();
+
+@@ -581,13 +636,12 @@ void __kprobes die_nmi(char *str, struct
+ * We are in trouble anyway, lets at least try
+ * to get a message out.
+ */
+- printk(str, safe_smp_processor_id());
++ printk(str, smp_processor_id());
+ show_registers(regs);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+- if (panic_on_timeout || panic_on_oops)
+- panic("nmi watchdog");
+- printk("console shuts up ...\n");
++ if (do_panic || panic_on_oops)
++ panic("Non maskable interrupt");
+ oops_end(flags);
+ nmi_exit();
+ local_irq_enable();
+@@ -734,8 +788,15 @@ asmlinkage void __kprobes do_general_pro
+ static __kprobes void
+ mem_parity_error(unsigned char reason, struct pt_regs * regs)
+ {
+- printk("Uhhuh. NMI received. Dazed and confused, but trying to continue\n");
+- printk("You probably have a hardware problem with your RAM chips\n");
++ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
++ reason);
++ printk(KERN_EMERG "You probably have a hardware problem with your "
++ "RAM chips\n");
++
++ if (panic_on_unrecovered_nmi)
++ panic("NMI: Not continuing");
++
++ printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+
+ #if 0 /* XEN */
+ /* Clear and disable the memory parity error line. */
+@@ -762,9 +823,15 @@ io_check_error(unsigned char reason, str
+
+ static __kprobes void
+ unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
+-{ printk("Uhhuh. NMI received for unknown reason %02x.\n", reason);
+- printk("Dazed and confused, but trying to continue\n");
+- printk("Do you have a strange power saving mode enabled?\n");
++{
++ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
++ reason);
++ printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
++
++ if (panic_on_unrecovered_nmi)
++ panic("NMI: Not continuing");
++
++ printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+ }
+
+ /* Runs on IST stack. This code must keep interrupts off all the time.
+@@ -789,12 +856,12 @@ asmlinkage __kprobes void default_do_nmi
+ * Ok, so this is none of the documented NMI sources,
+ * so it must be the NMI watchdog.
+ */
+- if (nmi_watchdog > 0) {
+- nmi_watchdog_tick(regs,reason);
++ if (nmi_watchdog_tick(regs,reason))
+ return;
+- }
+ #endif
+- unknown_nmi_error(reason, regs);
++ if (!do_nmi_callback(regs,cpu))
++ unknown_nmi_error(reason, regs);
++
+ return;
+ }
+ if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
+@@ -1081,6 +1148,7 @@ asmlinkage void math_state_restore(void)
+ init_fpu(me);
+ restore_fpu_checking(&me->thread.i387.fxsave);
+ task_thread_info(me)->status |= TS_USEDFPU;
++ me->fpu_counter++;
+ }
+
+
+@@ -1141,24 +1209,30 @@ void __cpuinit smp_trap_init(trap_info_t
+ }
+
+
+-/* Actual parsing is done early in setup.c. */
+-static int __init oops_dummy(char *s)
++static int __init oops_setup(char *s)
+ {
+- panic_on_oops = 1;
+- return 1;
++ if (!s)
++ return -EINVAL;
++ if (!strcmp(s, "panic"))
++ panic_on_oops = 1;
++ return 0;
+ }
+-__setup("oops=", oops_dummy);
++early_param("oops", oops_setup);
+
+ static int __init kstack_setup(char *s)
+ {
++ if (!s)
++ return -EINVAL;
+ kstack_depth_to_print = simple_strtoul(s,NULL,0);
+- return 1;
++ return 0;
+ }
+-__setup("kstack=", kstack_setup);
++early_param("kstack", kstack_setup);
+
+ #ifdef CONFIG_STACK_UNWIND
+ static int __init call_trace_setup(char *s)
+ {
++ if (!s)
++ return -EINVAL;
+ if (strcmp(s, "old") == 0)
+ call_trace = -1;
+ else if (strcmp(s, "both") == 0)
+@@ -1167,7 +1241,7 @@ static int __init call_trace_setup(char
+ call_trace = 1;
+ else if (strcmp(s, "new") == 0)
+ call_trace = 2;
+- return 1;
++ return 0;
+ }
+-__setup("call_trace=", call_trace_setup);
++early_param("call_trace", call_trace_setup);
+ #endif
+Index: head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/vsyscall_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -26,6 +26,10 @@
+ #include <linux/seqlock.h>
+ #include <linux/jiffies.h>
+ #include <linux/sysctl.h>
++#include <linux/getcpu.h>
++#include <linux/cpu.h>
++#include <linux/smp.h>
++#include <linux/notifier.h>
+
+ #include <asm/vsyscall.h>
+ #include <asm/pgtable.h>
+@@ -33,11 +37,15 @@
+ #include <asm/fixmap.h>
+ #include <asm/errno.h>
+ #include <asm/io.h>
++#include <asm/segment.h>
++#include <asm/desc.h>
++#include <asm/topology.h>
+
+ #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
+
+ int __sysctl_vsyscall __section_sysctl_vsyscall = 1;
+ seqlock_t __xtime_lock __section_xtime_lock = SEQLOCK_UNLOCKED;
++int __vgetcpu_mode __section_vgetcpu_mode;
+
+ #include <asm/unistd.h>
+
+@@ -61,8 +69,7 @@ static __always_inline void do_vgettimeo
+ sequence = read_seqbegin(&__xtime_lock);
+
+ sec = __xtime.tv_sec;
+- usec = (__xtime.tv_nsec / 1000) +
+- (__jiffies - __wall_jiffies) * (1000000 / HZ);
++ usec = __xtime.tv_nsec / 1000;
+
+ if (__vxtime.mode != VXTIME_HPET) {
+ t = get_cycles_sync();
+@@ -72,7 +79,8 @@ static __always_inline void do_vgettimeo
+ __vxtime.tsc_quot) >> 32;
+ /* See comment in x86_64 do_gettimeofday. */
+ } else {
+- usec += ((readl((void *)fix_to_virt(VSYSCALL_HPET) + 0xf0) -
++ usec += ((readl((void __iomem *)
++ fix_to_virt(VSYSCALL_HPET) + 0xf0) -
+ __vxtime.last) * __vxtime.quot) >> 32;
+ }
+ } while (read_seqretry(&__xtime_lock, sequence));
+@@ -127,9 +135,46 @@ time_t __vsyscall(1) vtime(time_t *t)
+ return __xtime.tv_sec;
+ }
+
+-long __vsyscall(2) venosys_0(void)
+-{
+- return -ENOSYS;
++/* Fast way to get current CPU and node.
++ This helps to do per node and per CPU caches in user space.
++ The result is not guaranteed without CPU affinity, but usually
++ works out because the scheduler tries to keep a thread on the same
++ CPU.
++
++ tcache must point to a two element sized long array.
++ All arguments can be NULL. */
++long __vsyscall(2)
++vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
++{
++ unsigned int dummy, p;
++ unsigned long j = 0;
++
++ /* Fast cache - only recompute value once per jiffies and avoid
++ relatively costly rdtscp/cpuid otherwise.
++ This works because the scheduler usually keeps the process
++ on the same CPU and this syscall doesn't guarantee its
++ results anyways.
++ We do this here because otherwise user space would do it on
++ its own in a likely inferior way (no access to jiffies).
++ If you don't like it pass NULL. */
++ if (tcache && tcache->blob[0] == (j = __jiffies)) {
++ p = tcache->blob[1];
++ } else if (__vgetcpu_mode == VGETCPU_RDTSCP) {
++ /* Load per CPU data from RDTSCP */
++ rdtscp(dummy, dummy, p);
++ } else {
++ /* Load per CPU data from GDT */
++ asm("lsl %1,%0" : "=r" (p) : "r" (__PER_CPU_SEG));
++ }
++ if (tcache) {
++ tcache->blob[0] = j;
++ tcache->blob[1] = p;
++ }
++ if (cpu)
++ *cpu = p & 0xfff;
++ if (node)
++ *node = p >> 12;
++ return 0;
+ }
+
+ long __vsyscall(3) venosys_1(void)
+@@ -149,7 +194,8 @@ static int vsyscall_sysctl_change(ctl_ta
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+ {
+ extern u16 vsysc1, vsysc2;
+- u16 *map1, *map2;
++ u16 __iomem *map1;
++ u16 __iomem *map2;
+ int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+ if (!write)
+ return ret;
+@@ -164,11 +210,11 @@ static int vsyscall_sysctl_change(ctl_ta
+ goto out;
+ }
+ if (!sysctl_vsyscall) {
+- *map1 = SYSCALL;
+- *map2 = SYSCALL;
++ writew(SYSCALL, map1);
++ writew(SYSCALL, map2);
+ } else {
+- *map1 = NOP2;
+- *map2 = NOP2;
++ writew(NOP2, map1);
++ writew(NOP2, map2);
+ }
+ iounmap(map2);
+ out:
+@@ -200,6 +246,48 @@ static ctl_table kernel_root_table2[] =
+
+ #endif
+
++/* Assume __initcall executes before all user space. Hopefully kmod
++ doesn't violate that. We'll find out if it does. */
++static void __cpuinit vsyscall_set_cpu(int cpu)
++{
++ unsigned long d;
++ unsigned long node = 0;
++#ifdef CONFIG_NUMA
++ node = cpu_to_node[cpu];
++#endif
++ if (cpu_has(&cpu_data[cpu], X86_FEATURE_RDTSCP))
++ write_rdtscp_aux((node << 12) | cpu);
++
++ /* Store cpu number in limit so that it can be loaded quickly
++ in user space in vgetcpu.
++ 12 bits for the CPU and 8 bits for the node. */
++ d = 0x0f40000000000ULL;
++ d |= cpu;
++ d |= (node & 0xf) << 12;
++ d |= (node >> 4) << 48;
++ if (HYPERVISOR_update_descriptor(virt_to_machine(cpu_gdt(cpu)
++ + GDT_ENTRY_PER_CPU),
++ d))
++ BUG();
++}
++
++static void __cpuinit cpu_vsyscall_init(void *arg)
++{
++ /* preemption should be already off */
++ vsyscall_set_cpu(raw_smp_processor_id());
++}
++
++#ifdef CONFIG_HOTPLUG_CPU
++static int __cpuinit
++cpu_vsyscall_notifier(struct notifier_block *n, unsigned long action, void *arg)
++{
++ long cpu = (long)arg;
++ if (action == CPU_ONLINE)
++ smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 0, 1);
++ return NOTIFY_DONE;
++}
++#endif
++
+ static void __init map_vsyscall(void)
+ {
+ extern char __vsyscall_0;
+@@ -214,13 +302,20 @@ static int __init vsyscall_init(void)
+ VSYSCALL_ADDR(__NR_vgettimeofday)));
+ BUG_ON((unsigned long) &vtime != VSYSCALL_ADDR(__NR_vtime));
+ BUG_ON((VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE)));
++ BUG_ON((unsigned long) &vgetcpu != VSYSCALL_ADDR(__NR_vgetcpu));
+ map_vsyscall();
+ #ifdef CONFIG_XEN
+ sysctl_vsyscall = 0; /* disable vgettimeofay() */
++ if (boot_cpu_has(X86_FEATURE_RDTSCP))
++ vgetcpu_mode = VGETCPU_RDTSCP;
++ else
++ vgetcpu_mode = VGETCPU_LSL;
+ #endif
+ #ifdef CONFIG_SYSCTL
+ register_sysctl_table(kernel_root_table2, 0);
+ #endif
++ on_each_cpu(cpu_vsyscall_init, NULL, 0, 1);
++ hotcpu_notifier(cpu_vsyscall_notifier, 0);
+ return 0;
+ }
+
+Index: head-2008-12-01/arch/x86/mm/fault_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -40,8 +40,7 @@
+ #define PF_RSVD (1<<3)
+ #define PF_INSTR (1<<4)
+
+-#ifdef CONFIG_KPROBES
+-ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
++static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
+
+ /* Hook to register for page fault notifications */
+ int register_page_fault_notifier(struct notifier_block *nb)
+@@ -49,11 +48,13 @@ int register_page_fault_notifier(struct
+ vmalloc_sync_all();
+ return atomic_notifier_chain_register(¬ify_page_fault_chain, nb);
+ }
++EXPORT_SYMBOL_GPL(register_page_fault_notifier);
+
+ int unregister_page_fault_notifier(struct notifier_block *nb)
+ {
+ return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb);
+ }
++EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
+
+ static inline int notify_page_fault(enum die_val val, const char *str,
+ struct pt_regs *regs, long err, int trap, int sig)
+@@ -67,13 +68,6 @@ static inline int notify_page_fault(enum
+ };
+ return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args);
+ }
+-#else
+-static inline int notify_page_fault(enum die_val val, const char *str,
+- struct pt_regs *regs, long err, int trap, int sig)
+-{
+- return NOTIFY_DONE;
+-}
+-#endif
+
+ void bust_spinlocks(int yes)
+ {
+@@ -102,7 +96,7 @@ void bust_spinlocks(int yes)
+ static noinline int is_prefetch(struct pt_regs *regs, unsigned long addr,
+ unsigned long error_code)
+ {
+- unsigned char *instr;
++ unsigned char __user *instr;
+ int scan_more = 1;
+ int prefetch = 0;
+ unsigned char *max_instr;
+@@ -111,7 +105,7 @@ static noinline int is_prefetch(struct p
+ if (error_code & PF_INSTR)
+ return 0;
+
+- instr = (unsigned char *)convert_rip_to_linear(current, regs);
++ instr = (unsigned char __user *)convert_rip_to_linear(current, regs);
+ max_instr = instr + 15;
+
+ if (user_mode(regs) && instr >= (unsigned char *)TASK_SIZE)
+@@ -122,7 +116,7 @@ static noinline int is_prefetch(struct p
+ unsigned char instr_hi;
+ unsigned char instr_lo;
+
+- if (__get_user(opcode, instr))
++ if (__get_user(opcode, (char __user *)instr))
+ break;
+
+ instr_hi = opcode & 0xf0;
+@@ -160,7 +154,7 @@ static noinline int is_prefetch(struct p
+ case 0x00:
+ /* Prefetch instruction is 0x0F0D or 0x0F18 */
+ scan_more = 0;
+- if (__get_user(opcode, instr))
++ if (__get_user(opcode, (char __user *)instr))
+ break;
+ prefetch = (instr_lo == 0xF) &&
+ (opcode == 0x0D || opcode == 0x18);
+@@ -176,7 +170,7 @@ static noinline int is_prefetch(struct p
+ static int bad_address(void *p)
+ {
+ unsigned long dummy;
+- return __get_user(dummy, (unsigned long *)p);
++ return __get_user(dummy, (unsigned long __user *)p);
+ }
+
+ void dump_pagetable(unsigned long address)
+@@ -248,7 +242,7 @@ static int is_errata93(struct pt_regs *r
+
+ int unhandled_signal(struct task_struct *tsk, int sig)
+ {
+- if (tsk->pid == 1)
++ if (is_init(tsk))
+ return 1;
+ if (tsk->ptrace & PT_PTRACED)
+ return 0;
+@@ -300,7 +294,7 @@ static int vmalloc_fault(unsigned long a
+ if (pgd_none(*pgd))
+ set_pgd(pgd, *pgd_ref);
+ else
+- BUG_ON(pgd_page(*pgd) != pgd_page(*pgd_ref));
++ BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+
+ /* Below here mismatches are bugs because these lower tables
+ are shared */
+@@ -309,7 +303,7 @@ static int vmalloc_fault(unsigned long a
+ pud_ref = pud_offset(pgd_ref, address);
+ if (pud_none(*pud_ref))
+ return -1;
+- if (pud_none(*pud) || pud_page(*pud) != pud_page(*pud_ref))
++ if (pud_none(*pud) || pud_page_vaddr(*pud) != pud_page_vaddr(*pud_ref))
+ BUG();
+ pmd = pmd_offset(pud, address);
+ pmd_ref = pmd_offset(pud_ref, address);
+@@ -531,7 +525,7 @@ good_area:
+ case PF_PROT: /* read, present */
+ goto bad_area;
+ case 0: /* read, not present */
+- if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
++ if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
+ goto bad_area;
+ }
+
+@@ -647,7 +641,7 @@ no_context:
+ */
+ out_of_memory:
+ up_read(&mm->mmap_sem);
+- if (current->pid == 1) {
++ if (is_init(current)) {
+ yield();
+ goto again;
+ }
+@@ -702,7 +696,7 @@ void vmalloc_sync_all(void)
+ if (pgd_none(*pgd))
+ set_pgd(pgd, *pgd_ref);
+ else
+- BUG_ON(pgd_page(*pgd) != pgd_page(*pgd_ref));
++ BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+ }
+ spin_unlock(&pgd_lock);
+ set_bit(pgd_index(address), insync);
+Index: head-2008-12-01/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -61,8 +61,6 @@ EXPORT_SYMBOL(__kernel_page_user);
+
+ int after_bootmem;
+
+-static unsigned long dma_reserve __initdata;
+-
+ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+ extern unsigned long start_pfn;
+
+@@ -420,7 +418,6 @@ __init void *early_ioremap(unsigned long
+
+ /* actually usually some more */
+ if (size >= LARGE_PAGE_SIZE) {
+- printk("SMBIOS area too long %lu\n", size);
+ return NULL;
+ }
+ set_pmd(temp_mappings[0].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
+@@ -442,16 +439,24 @@ __init void early_iounmap(void *addr, un
+ #endif
+
+ static void __meminit
+-phys_pmd_init(pmd_t *pmd, unsigned long address, unsigned long end)
++phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end)
+ {
+- int i, k;
++ int i = pmd_index(address);
+
+- for (i = 0; i < PTRS_PER_PMD; pmd++, i++) {
++ for (; i < PTRS_PER_PMD; i++) {
+ unsigned long pte_phys;
++ pmd_t *pmd = pmd_page + i;
+ pte_t *pte, *pte_save;
++ int k;
+
+ if (address >= end)
+ break;
++
++ if (__pmd_val(*pmd)) {
++ address += PMD_SIZE;
++ continue;
++ }
++
+ pte = alloc_static_page(&pte_phys);
+ pte_save = pte;
+ for (k = 0; k < PTRS_PER_PTE; pte++, k++, address += PTE_SIZE) {
+@@ -478,40 +483,35 @@ phys_pmd_init(pmd_t *pmd, unsigned long
+ static void __meminit
+ phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end)
+ {
+- pmd_t *pmd = pmd_offset(pud, (unsigned long)__va(address));
+-
+- if (pmd_none(*pmd)) {
+- spin_lock(&init_mm.page_table_lock);
+- phys_pmd_init(pmd, address, end);
+- spin_unlock(&init_mm.page_table_lock);
+- __flush_tlb_all();
+- }
++ pmd_t *pmd = pmd_offset(pud,0);
++ spin_lock(&init_mm.page_table_lock);
++ phys_pmd_init(pmd, address, end);
++ spin_unlock(&init_mm.page_table_lock);
++ __flush_tlb_all();
+ }
+
+-static void __meminit phys_pud_init(pud_t *pud, unsigned long address, unsigned long end)
++static void __meminit phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end)
+ {
+- long i = pud_index(address);
+-
+- pud = pud + i;
+-
+- if (after_bootmem && pud_val(*pud)) {
+- phys_pmd_update(pud, address, end);
+- return;
+- }
++ int i = pud_index(addr);
+
+- for (; i < PTRS_PER_PUD; pud++, i++) {
+- unsigned long paddr, pmd_phys;
++ for (; i < PTRS_PER_PUD; i++, addr = (addr & PUD_MASK) + PUD_SIZE ) {
++ unsigned long pmd_phys;
++ pud_t *pud = pud_page + pud_index(addr);
+ pmd_t *pmd;
+
+- paddr = (address & PGDIR_MASK) + i*PUD_SIZE;
+- if (paddr >= end)
++ if (addr >= end)
+ break;
+
++ if (__pud_val(*pud)) {
++ phys_pmd_update(pud, addr, end);
++ continue;
++ }
++
+ pmd = alloc_static_page(&pmd_phys);
+
+ spin_lock(&init_mm.page_table_lock);
+ *pud = __pud(pmd_phys | _KERNPG_TABLE);
+- phys_pmd_init(pmd, paddr, end);
++ phys_pmd_init(pmd, addr, end);
+ spin_unlock(&init_mm.page_table_lock);
+
+ early_make_page_readonly(pmd, XENFEAT_writable_page_tables);
+@@ -775,69 +775,18 @@ void __cpuinit zap_low_mappings(int cpu)
+ #endif
+ }
+
+-/* Compute zone sizes for the DMA and DMA32 zones in a node. */
+-__init void
+-size_zones(unsigned long *z, unsigned long *h,
+- unsigned long start_pfn, unsigned long end_pfn)
+-{
+- int i;
+- unsigned long w;
+-
+- for (i = 0; i < MAX_NR_ZONES; i++)
+- z[i] = 0;
+-
+- if (start_pfn < MAX_DMA_PFN)
+- z[ZONE_DMA] = MAX_DMA_PFN - start_pfn;
+- if (start_pfn < MAX_DMA32_PFN) {
+- unsigned long dma32_pfn = MAX_DMA32_PFN;
+- if (dma32_pfn > end_pfn)
+- dma32_pfn = end_pfn;
+- z[ZONE_DMA32] = dma32_pfn - start_pfn;
+- }
+- z[ZONE_NORMAL] = end_pfn - start_pfn;
+-
+- /* Remove lower zones from higher ones. */
+- w = 0;
+- for (i = 0; i < MAX_NR_ZONES; i++) {
+- if (z[i])
+- z[i] -= w;
+- w += z[i];
+- }
+-
+- /* Compute holes */
+- w = start_pfn;
+- for (i = 0; i < MAX_NR_ZONES; i++) {
+- unsigned long s = w;
+- w += z[i];
+- h[i] = e820_hole_size(s, w);
+- }
+-
+- /* Add the space pace needed for mem_map to the holes too. */
+- for (i = 0; i < MAX_NR_ZONES; i++)
+- h[i] += (z[i] * sizeof(struct page)) / PAGE_SIZE;
+-
+- /* The 16MB DMA zone has the kernel and other misc mappings.
+- Account them too */
+- if (h[ZONE_DMA]) {
+- h[ZONE_DMA] += dma_reserve;
+- if (h[ZONE_DMA] >= z[ZONE_DMA]) {
+- printk(KERN_WARNING
+- "Kernel too large and filling up ZONE_DMA?\n");
+- h[ZONE_DMA] = z[ZONE_DMA];
+- }
+- }
+-}
+-
+ #ifndef CONFIG_NUMA
+ void __init paging_init(void)
+ {
+- unsigned long zones[MAX_NR_ZONES], holes[MAX_NR_ZONES];
++ unsigned long max_zone_pfns[MAX_NR_ZONES];
++ memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
++ max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
++ max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
++ max_zone_pfns[ZONE_NORMAL] = end_pfn;
+
+ memory_present(0, 0, end_pfn);
+ sparse_init();
+- size_zones(zones, holes, 0, end_pfn);
+- free_area_init_node(0, NODE_DATA(0), zones,
+- __pa(PAGE_OFFSET) >> PAGE_SHIFT, holes);
++ free_area_init_nodes(max_zone_pfns);
+
+ init_mm.context.pinned = 1;
+ }
+@@ -891,36 +840,23 @@ void online_page(struct page *page)
+
+ #ifdef CONFIG_MEMORY_HOTPLUG
+ /*
+- * XXX: memory_add_physaddr_to_nid() is to find node id from physical address
+- * via probe interface of sysfs. If acpi notifies hot-add event, then it
+- * can tell node id by searching dsdt. But, probe interface doesn't have
+- * node id. So, return 0 as node id at this time.
+- */
+-#ifdef CONFIG_NUMA
+-int memory_add_physaddr_to_nid(u64 start)
+-{
+- return 0;
+-}
+-#endif
+-
+-/*
+ * Memory is added always to NORMAL zone. This means you will never get
+ * additional DMA/DMA32 memory.
+ */
+ int arch_add_memory(int nid, u64 start, u64 size)
+ {
+ struct pglist_data *pgdat = NODE_DATA(nid);
+- struct zone *zone = pgdat->node_zones + MAX_NR_ZONES-2;
++ struct zone *zone = pgdat->node_zones + ZONE_NORMAL;
+ unsigned long start_pfn = start >> PAGE_SHIFT;
+ unsigned long nr_pages = size >> PAGE_SHIFT;
+ int ret;
+
++ init_memory_mapping(start, (start + size -1));
++
+ ret = __add_pages(zone, start_pfn, nr_pages);
+ if (ret)
+ goto error;
+
+- init_memory_mapping(start, (start + size -1));
+-
+ return ret;
+ error:
+ printk("%s: Problem encountered in __add_pages!\n", __func__);
+@@ -934,7 +870,17 @@ int remove_memory(u64 start, u64 size)
+ }
+ EXPORT_SYMBOL_GPL(remove_memory);
+
+-#else /* CONFIG_MEMORY_HOTPLUG */
++#if !defined(CONFIG_ACPI_NUMA) && defined(CONFIG_NUMA)
++int memory_add_physaddr_to_nid(u64 start)
++{
++ return 0;
++}
++EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
++#endif
++
++#endif /* CONFIG_MEMORY_HOTPLUG */
++
++#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE
+ /*
+ * Memory Hotadd without sparsemem. The mem_maps have been allocated in advance,
+ * just online the pages.
+@@ -960,7 +906,7 @@ int __add_pages(struct zone *z, unsigned
+ }
+ return err;
+ }
+-#endif /* CONFIG_MEMORY_HOTPLUG */
++#endif
+
+ static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, kcore_modules,
+ kcore_vsyscall;
+@@ -972,12 +918,6 @@ void __init mem_init(void)
+
+ pci_iommu_alloc();
+
+- /* How many end-of-memory variables you have, grandma! */
+- max_low_pfn = end_pfn;
+- max_pfn = end_pfn;
+- num_physpages = end_pfn;
+- high_memory = (void *) __va(end_pfn * PAGE_SIZE);
+-
+ /* clear the zero-page */
+ memset(empty_zero_page, 0, PAGE_SIZE);
+
+@@ -995,7 +935,8 @@ void __init mem_init(void)
+ init_page_count(pfn_to_page(pfn));
+ totalram_pages++;
+ }
+- reservedpages = end_pfn - totalram_pages - e820_hole_size(0, end_pfn);
++ reservedpages = end_pfn - totalram_pages -
++ absent_pages_in_range(0, end_pfn);
+
+ after_bootmem = 1;
+
+@@ -1102,15 +1043,34 @@ void free_initrd_mem(unsigned long start
+
+ void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
+ {
+- /* Should check here against the e820 map to avoid double free */
+ #ifdef CONFIG_NUMA
+ int nid = phys_to_nid(phys);
++#endif
++ unsigned long pfn = phys >> PAGE_SHIFT;
++ if (pfn >= end_pfn) {
++ /* This can happen with kdump kernels when accessing firmware
++ tables. */
++ if (pfn < end_pfn_map)
++ return;
++ printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %u\n",
++ phys, len);
++ return;
++ }
++
++ /* Should check here against the e820 map to avoid double free */
++#ifdef CONFIG_NUMA
+ reserve_bootmem_node(NODE_DATA(nid), phys, len);
+ #else
+ reserve_bootmem(phys, len);
+ #endif
+- if (phys+len <= MAX_DMA_PFN*PAGE_SIZE)
++#ifndef CONFIG_XEN
++ if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {
++ static unsigned long dma_reserve __initdata;
++
+ dma_reserve += len / PAGE_SIZE;
++ set_dma_reserve(dma_reserve);
++ }
++#endif
+ }
+
+ int kern_addr_valid(unsigned long addr)
+Index: head-2008-12-01/arch/x86/mm/pageattr_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pageattr_64-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pageattr_64-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -377,8 +377,8 @@ static void revert_page(unsigned long ad
+ BUG_ON(pud_none(*pud));
+ pmd = pmd_offset(pud, address);
+ BUG_ON(__pmd_val(*pmd) & _PAGE_PSE);
+- pgprot_val(ref_prot) |= _PAGE_PSE;
+ large_pte = mk_pte_phys(__pa(address) & LARGE_PAGE_MASK, ref_prot);
++ large_pte = pte_mkhuge(large_pte);
+ set_pte((pte_t *)pmd, large_pte);
+ }
+
+@@ -388,32 +388,28 @@ __change_page_attr(unsigned long address
+ {
+ pte_t *kpte;
+ struct page *kpte_page;
+- unsigned kpte_flags;
+ pgprot_t ref_prot2;
+ kpte = lookup_address(address);
+ if (!kpte) return 0;
+ kpte_page = virt_to_page(((unsigned long)kpte) & PAGE_MASK);
+- kpte_flags = pte_val(*kpte);
+ if (pgprot_val(prot) != pgprot_val(ref_prot)) {
+- if ((kpte_flags & _PAGE_PSE) == 0) {
++ if (!pte_huge(*kpte)) {
+ set_pte(kpte, pfn_pte(pfn, prot));
+ } else {
+ /*
+ * split_large_page will take the reference for this
+ * change_page_attr on the split page.
+ */
+-
+ struct page *split;
+- ref_prot2 = __pgprot(pgprot_val(pte_pgprot(*lookup_address(address))) & ~(1<<_PAGE_BIT_PSE));
+-
++ ref_prot2 = pte_pgprot(pte_clrhuge(*kpte));
+ split = split_large_page(address, prot, ref_prot2);
+ if (!split)
+ return -ENOMEM;
+- set_pte(kpte,mk_pte(split, ref_prot2));
++ set_pte(kpte, mk_pte(split, ref_prot2));
+ kpte_page = split;
+- }
++ }
+ page_private(kpte_page)++;
+- } else if ((kpte_flags & _PAGE_PSE) == 0) {
++ } else if (!pte_huge(*kpte)) {
+ set_pte(kpte, pfn_pte(pfn, ref_prot));
+ BUG_ON(page_private(kpte_page) == 0);
+ page_private(kpte_page)--;
+@@ -470,10 +466,12 @@ int change_page_attr_addr(unsigned long
+ * lowmem */
+ if (__pa(address) < KERNEL_TEXT_SIZE) {
+ unsigned long addr2;
+- pgprot_t prot2 = prot;
++ pgprot_t prot2;
+ addr2 = __START_KERNEL_map + __pa(address);
+- pgprot_val(prot2) &= ~_PAGE_NX;
+- err = __change_page_attr(addr2, pfn, prot2, PAGE_KERNEL_EXEC);
++ /* Make sure the kernel mappings stay executable */
++ prot2 = pte_pgprot(pte_mkexec(pfn_pte(0, prot)));
++ err = __change_page_attr(addr2, pfn, prot2,
++ PAGE_KERNEL_EXEC);
+ }
+ }
+ up_write(&init_mm.mmap_sem);
+Index: head-2008-12-01/drivers/char/tpm/tpm_xen.c
+===================================================================
+--- head-2008-12-01.orig/drivers/char/tpm/tpm_xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/char/tpm/tpm_xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -85,8 +85,7 @@ static struct tpm_private *my_priv;
+
+ /* local function prototypes */
+ static irqreturn_t tpmif_int(int irq,
+- void *tpm_priv,
+- struct pt_regs *ptregs);
++ void *tpm_priv);
+ static void tpmif_rx_action(unsigned long unused);
+ static int tpmif_connect(struct xenbus_device *dev,
+ struct tpm_private *tp,
+@@ -559,7 +558,7 @@ static void tpmif_rx_action(unsigned lon
+ }
+
+
+-static irqreturn_t tpmif_int(int irq, void *tpm_priv, struct pt_regs *ptregs)
++static irqreturn_t tpmif_int(int irq, void *tpm_priv)
+ {
+ struct tpm_private *tp = tpm_priv;
+ unsigned long flags;
+Index: head-2008-12-01/drivers/pci/Kconfig
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/Kconfig 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/pci/Kconfig 2008-12-01 11:29:05.000000000 +0100
+@@ -48,7 +48,7 @@ config PCI_DEBUG
+ config HT_IRQ
+ bool "Interrupts on hypertransport devices"
+ default y
+- depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
++ depends on PCI && X86_LOCAL_APIC && X86_IO_APIC && !XEN
+ help
+ This allows native hypertransport devices to use interrupts.
+
+Index: head-2008-12-01/drivers/pci/msi-xen.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/msi-xen.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/pci/msi-xen.c 2008-12-01 11:29:05.000000000 +0100
+@@ -6,6 +6,7 @@
+ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
+ */
+
++#include <linux/err.h>
+ #include <linux/mm.h>
+ #include <linux/irq.h>
+ #include <linux/interrupt.h>
+@@ -14,6 +15,7 @@
+ #include <linux/smp_lock.h>
+ #include <linux/pci.h>
+ #include <linux/proc_fs.h>
++#include <linux/msi.h>
+
+ #include <xen/evtchn.h>
+
+@@ -26,14 +28,6 @@
+
+ static int pci_msi_enable = 1;
+
+-static struct msi_ops *msi_ops;
+-
+-int msi_register(struct msi_ops *ops)
+-{
+- msi_ops = ops;
+- return 0;
+-}
+-
+ static LIST_HEAD(msi_dev_head);
+ DEFINE_SPINLOCK(msi_dev_lock);
+
+@@ -406,9 +400,9 @@ void pci_restore_msix_state(struct pci_d
+ * @dev: pointer to the pci_dev data structure of MSI device function
+ *
+ * Setup the MSI capability structure of device function with a single
+- * MSI vector, regardless of device function is capable of handling
++ * MSI irq, regardless of device function is capable of handling
+ * multiple messages. A return of zero indicates the successful setup
+- * of an entry zero with the new MSI vector or non-zero for otherwise.
++ * of an entry zero with the new MSI irq or non-zero for otherwise.
+ **/
+ static int msi_capability_init(struct pci_dev *dev)
+ {
+@@ -422,11 +416,11 @@ static int msi_capability_init(struct pc
+ if (pirq < 0)
+ return -EBUSY;
+
+- dev->irq = pirq;
+ /* Set MSI enabled bits */
+ enable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
+ dev->msi_enabled = 1;
+
++ dev->irq = pirq;
+ return 0;
+ }
+
+@@ -437,8 +431,8 @@ static int msi_capability_init(struct pc
+ * @nvec: number of @entries
+ *
+ * Setup the MSI-X capability structure of device function with a
+- * single MSI-X vector. A return of zero indicates the successful setup of
+- * requested MSI-X entries with allocated vectors or non-zero for otherwise.
++ * single MSI-X irq. A return of zero indicates the successful setup of
++ * requested MSI-X entries with allocated irqs or non-zero for otherwise.
+ **/
+ static int msix_capability_init(struct pci_dev *dev,
+ struct msix_entry *entries, int nvec)
+@@ -480,12 +474,18 @@ static int msix_capability_init(struct p
+ }
+
+ if (i != nvec) {
++ int avail = i - 1;
+ for (j = --i; j >= 0; j--) {
+ msi_unmap_pirq(dev, entries[j].vector);
+ detach_pirq_entry(entries[j].entry, msi_dev_entry);
+ entries[j].vector = 0;
+ }
+- return -EBUSY;
++ /* If we had some success report the number of irqs
++ * we succeeded in setting up.
++ */
++ if (avail <= 0)
++ avail = -EBUSY;
++ return avail;
+ }
+
+ enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
+@@ -495,11 +495,40 @@ static int msix_capability_init(struct p
+ }
+
+ /**
++ * pci_msi_supported - check whether MSI may be enabled on device
++ * @dev: pointer to the pci_dev data structure of MSI device function
++ *
++ * Look at global flags, the device itself, and its parent busses
++ * to return 0 if MSI are supported for the device.
++ **/
++static
++int pci_msi_supported(struct pci_dev * dev)
++{
++ struct pci_bus *bus;
++
++ /* MSI must be globally enabled and supported by the device */
++ if (!pci_msi_enable || !dev || dev->no_msi)
++ return -EINVAL;
++
++ /* Any bridge which does NOT route MSI transactions from it's
++ * secondary bus to it's primary bus must set NO_MSI flag on
++ * the secondary pci_bus.
++ * We expect only arch-specific PCI host bus controller driver
++ * or quirks for specific PCI bridges to be setting NO_MSI.
++ */
++ for (bus = dev->bus; bus; bus = bus->parent)
++ if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
++ return -EINVAL;
++
++ return 0;
++}
++
++/**
+ * pci_enable_msi - configure device's MSI capability structure
+ * @dev: pointer to the pci_dev data structure of MSI device function
+ *
+ * Setup the MSI capability structure of device function with
+- * a single MSI vector upon its software driver call to request for
++ * a single MSI irq upon its software driver call to request for
+ * MSI mode enabled on its hardware device function. A return of zero
+ * indicates the successful setup of an entry zero with the new MSI
+ * vector or non-zero for otherwise.
+@@ -508,13 +537,10 @@ extern int pci_frontend_enable_msi(struc
+ int pci_enable_msi(struct pci_dev* dev)
+ {
+ struct pci_bus *bus;
+- int pos, temp, status = -EINVAL;
+-
+- if (!pci_msi_enable || !dev)
+- return status;
++ int pos, temp, status;
+
+- if (dev->no_msi)
+- return status;
++ if (pci_msi_supported(dev) < 0)
++ return -EINVAL;
+
+ for (bus = dev->bus; bus; bus = bus->parent)
+ if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
+@@ -547,10 +573,10 @@ int pci_enable_msi(struct pci_dev* dev)
+ if (!pos)
+ return -EINVAL;
+
+- /* Check whether driver already requested for MSI-X vectors */
++ /* Check whether driver already requested for MSI-X irqs */
+ if (dev->msix_enabled) {
+ printk(KERN_INFO "PCI: %s: Can't enable MSI. "
+- "Device already has MSI-X vectors assigned\n",
++ "Device already has MSI-X irq assigned\n",
+ pci_name(dev));
+ dev->irq = temp;
+ return -EINVAL;
+@@ -602,36 +628,28 @@ void pci_disable_msi(struct pci_dev* dev
+ * pci_enable_msix - configure device's MSI-X capability structure
+ * @dev: pointer to the pci_dev data structure of MSI-X device function
+ * @entries: pointer to an array of MSI-X entries
+- * @nvec: number of MSI-X vectors requested for allocation by device driver
++ * @nvec: number of MSI-X irqs requested for allocation by device driver
+ *
+ * Setup the MSI-X capability structure of device function with the number
+- * of requested vectors upon its software driver call to request for
++ * of requested irqs upon its software driver call to request for
+ * MSI-X mode enabled on its hardware device function. A return of zero
+ * indicates the successful configuration of MSI-X capability structure
+- * with new allocated MSI-X vectors. A return of < 0 indicates a failure.
++ * with new allocated MSI-X irqs. A return of < 0 indicates a failure.
+ * Or a return of > 0 indicates that driver request is exceeding the number
+- * of vectors available. Driver should use the returned value to re-send
++ * of irqs available. Driver should use the returned value to re-send
+ * its request.
+ **/
+ extern int pci_frontend_enable_msix(struct pci_dev *dev,
+ struct msix_entry *entries, int nvec);
+ int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec)
+ {
+- struct pci_bus *bus;
+ int status, pos, nr_entries;
+ int i, j, temp;
+ u16 control;
+
+- if (!pci_msi_enable || !dev || !entries)
++ if (!entries || pci_msi_supported(dev) < 0)
+ return -EINVAL;
+
+- if (dev->no_msi)
+- return -EINVAL;
+-
+- for (bus = dev->bus; bus; bus = bus->parent)
+- if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
+- return -EINVAL;
+-
+ #ifdef CONFIG_XEN_PCIDEV_FRONTEND
+ if (!is_initial_xendomain()) {
+ struct msi_dev_list *msi_dev_entry;
+@@ -694,7 +712,7 @@ int pci_enable_msix(struct pci_dev* dev,
+ /* Check whether driver already requested for MSI vector */
+ if (dev->msi_enabled) {
+ printk(KERN_INFO "PCI: %s: Can't enable MSI-X. "
+- "Device already has an MSI vector assigned\n",
++ "Device already has an MSI irq assigned\n",
+ pci_name(dev));
+ dev->irq = temp;
+ return -EINVAL;
+@@ -757,11 +775,11 @@ void pci_disable_msix(struct pci_dev* de
+ }
+
+ /**
+- * msi_remove_pci_irq_vectors - reclaim MSI(X) vectors to unused state
++ * msi_remove_pci_irq_vectors - reclaim MSI(X) irqs to unused state
+ * @dev: pointer to the pci_dev data structure of MSI(X) device function
+ *
+ * Being called during hotplug remove, from which the device function
+- * is hot-removed. All previous assigned MSI/MSI-X vectors, if
++ * is hot-removed. All previous assigned MSI/MSI-X irqs, if
+ * allocated for this device function, are reclaimed to unused state,
+ * which may be used later on.
+ **/
+Index: head-2008-12-01/drivers/xen/Kconfig
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/Kconfig 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/Kconfig 2008-12-01 11:29:05.000000000 +0100
+@@ -287,6 +287,9 @@ endmenu
+ config HAVE_IRQ_IGNORE_UNHANDLED
+ def_bool y
+
++config GENERIC_HARDIRQS_NO__DO_IRQ
++ def_bool y
++
+ config NO_IDLE_HZ
+ def_bool y
+
+Index: head-2008-12-01/drivers/xen/balloon/balloon.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/balloon/balloon.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/balloon/balloon.c 2008-12-01 11:29:05.000000000 +0100
+@@ -84,7 +84,7 @@ static unsigned long frame_list[PAGE_SIZ
+ /* VM /proc information for memory */
+ extern unsigned long totalram_pages;
+
+-#ifndef MODULE
++#if !defined(MODULE) && defined(CONFIG_HIGHMEM)
+ extern unsigned long totalhigh_pages;
+ #define inc_totalhigh_pages() (totalhigh_pages++)
+ #define dec_totalhigh_pages() (totalhigh_pages--)
+Index: head-2008-12-01/drivers/xen/blkback/blkback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/blkback.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkback/blkback.c 2008-12-01 11:29:05.000000000 +0100
+@@ -288,7 +288,7 @@ static void blkif_notify_work(blkif_t *b
+ wake_up(&blkif->wq);
+ }
+
+-irqreturn_t blkif_be_int(int irq, void *dev_id, struct pt_regs *regs)
++irqreturn_t blkif_be_int(int irq, void *dev_id)
+ {
+ blkif_notify_work(dev_id);
+ return IRQ_HANDLED;
+Index: head-2008-12-01/drivers/xen/blkback/common.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/common.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkback/common.h 2008-12-01 11:29:05.000000000 +0100
+@@ -130,7 +130,7 @@ void blkif_interface_init(void);
+
+ void blkif_xenbus_init(void);
+
+-irqreturn_t blkif_be_int(int irq, void *dev_id, struct pt_regs *regs);
++irqreturn_t blkif_be_int(int irq, void *dev_id);
+ int blkif_schedule(void *arg);
+
+ int blkback_barrier(struct xenbus_transaction xbt,
+Index: head-2008-12-01/drivers/xen/blkfront/blkfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkfront/blkfront.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkfront/blkfront.c 2008-12-01 11:29:05.000000000 +0100
+@@ -69,7 +69,7 @@ static int setup_blkring(struct xenbus_d
+
+ static void kick_pending_request_queues(struct blkfront_info *);
+
+-static irqreturn_t blkif_int(int irq, void *dev_id, struct pt_regs *ptregs);
++static irqreturn_t blkif_int(int irq, void *dev_id);
+ static void blkif_restart_queue(void *arg);
+ static void blkif_recover(struct blkfront_info *);
+ static void blkif_completion(struct blk_shadow *);
+@@ -712,7 +712,7 @@ void do_blkif_request(request_queue_t *r
+ }
+
+
+-static irqreturn_t blkif_int(int irq, void *dev_id, struct pt_regs *ptregs)
++static irqreturn_t blkif_int(int irq, void *dev_id)
+ {
+ struct request *req;
+ blkif_response_t *bret;
+Index: head-2008-12-01/drivers/xen/blktap/blktap.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blktap/blktap.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/blktap/blktap.c 2008-12-01 11:29:05.000000000 +0100
+@@ -1225,7 +1225,7 @@ static void blkif_notify_work(blkif_t *b
+ wake_up(&blkif->wq);
+ }
+
+-irqreturn_t tap_blkif_be_int(int irq, void *dev_id, struct pt_regs *regs)
++irqreturn_t tap_blkif_be_int(int irq, void *dev_id)
+ {
+ blkif_notify_work(dev_id);
+ return IRQ_HANDLED;
+Index: head-2008-12-01/drivers/xen/blktap/common.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blktap/common.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/blktap/common.h 2008-12-01 11:29:05.000000000 +0100
+@@ -113,7 +113,7 @@ void tap_blkif_interface_init(void);
+
+ void tap_blkif_xenbus_init(void);
+
+-irqreturn_t tap_blkif_be_int(int irq, void *dev_id, struct pt_regs *regs);
++irqreturn_t tap_blkif_be_int(int irq, void *dev_id);
+ int tap_blkif_schedule(void *arg);
+
+ int dom_to_devid(domid_t domid, int xenbus_id, blkif_t *blkif);
+Index: head-2008-12-01/drivers/xen/console/console.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/console/console.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/console/console.c 2008-12-01 11:29:05.000000000 +0100
+@@ -345,7 +345,7 @@ static struct tty_struct *xencons_tty;
+ static int xencons_priv_irq;
+ static char x_char;
+
+-void xencons_rx(char *buf, unsigned len, struct pt_regs *regs)
++void xencons_rx(char *buf, unsigned len)
+ {
+ int i;
+ unsigned long flags;
+@@ -370,8 +370,7 @@ void xencons_rx(char *buf, unsigned len,
+ if (time_before(jiffies, sysrq_timeout)) {
+ spin_unlock_irqrestore(
+ &xencons_lock, flags);
+- handle_sysrq(
+- buf[i], regs, xencons_tty);
++ handle_sysrq(buf[i], xencons_tty);
+ spin_lock_irqsave(
+ &xencons_lock, flags);
+ continue;
+@@ -436,14 +435,13 @@ void xencons_tx(void)
+ }
+
+ /* Privileged receive callback and transmit kicker. */
+-static irqreturn_t xencons_priv_interrupt(int irq, void *dev_id,
+- struct pt_regs *regs)
++static irqreturn_t xencons_priv_interrupt(int irq, void *dev_id)
+ {
+ static char rbuf[16];
+ int l;
+
+ while ((l = HYPERVISOR_console_io(CONSOLEIO_read, 16, rbuf)) > 0)
+- xencons_rx(rbuf, l, regs);
++ xencons_rx(rbuf, l);
+
+ xencons_tx();
+
+@@ -631,7 +629,7 @@ static void xencons_close(struct tty_str
+ spin_unlock_irqrestore(&xencons_lock, flags);
+ }
+
+-static struct tty_operations xencons_ops = {
++static const struct tty_operations xencons_ops = {
+ .open = xencons_open,
+ .close = xencons_close,
+ .write = xencons_write,
+Index: head-2008-12-01/drivers/xen/console/xencons_ring.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/console/xencons_ring.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/console/xencons_ring.c 2008-12-01 11:29:05.000000000 +0100
+@@ -83,7 +83,7 @@ int xencons_ring_send(const char *data,
+ return sent;
+ }
+
+-static irqreturn_t handle_input(int irq, void *unused, struct pt_regs *regs)
++static irqreturn_t handle_input(int irq, void *unused)
+ {
+ struct xencons_interface *intf = xencons_interface();
+ XENCONS_RING_IDX cons, prod;
+@@ -94,7 +94,7 @@ static irqreturn_t handle_input(int irq,
+ BUG_ON((prod - cons) > sizeof(intf->in));
+
+ while (cons != prod) {
+- xencons_rx(intf->in+MASK_XENCONS_IDX(cons,intf->in), 1, regs);
++ xencons_rx(intf->in+MASK_XENCONS_IDX(cons,intf->in), 1);
+ cons++;
+ }
+
+Index: head-2008-12-01/drivers/xen/core/evtchn.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/evtchn.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/evtchn.c 2008-12-03 15:52:42.000000000 +0100
+@@ -515,7 +515,7 @@ static void unbind_from_irq(unsigned int
+
+ int bind_caller_port_to_irqhandler(
+ unsigned int caller_port,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id)
+@@ -538,7 +538,7 @@ EXPORT_SYMBOL_GPL(bind_caller_port_to_ir
+
+ int bind_listening_port_to_irqhandler(
+ unsigned int remote_domain,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id)
+@@ -562,7 +562,7 @@ EXPORT_SYMBOL_GPL(bind_listening_port_to
+ int bind_interdomain_evtchn_to_irqhandler(
+ unsigned int remote_domain,
+ unsigned int remote_port,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id)
+@@ -586,7 +586,7 @@ EXPORT_SYMBOL_GPL(bind_interdomain_evtch
+ int bind_virq_to_irqhandler(
+ unsigned int virq,
+ unsigned int cpu,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id)
+@@ -610,7 +610,7 @@ EXPORT_SYMBOL_GPL(bind_virq_to_irqhandle
+ int bind_ipi_to_irqhandler(
+ unsigned int ipi,
+ unsigned int cpu,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id)
+@@ -695,15 +695,7 @@ static unsigned int startup_dynirq(unsig
+ return 0;
+ }
+
+-static void shutdown_dynirq(unsigned int irq)
+-{
+- int evtchn = evtchn_from_irq(irq);
+-
+- if (VALID_EVTCHN(evtchn))
+- mask_evtchn(evtchn);
+-}
+-
+-static void enable_dynirq(unsigned int irq)
++static void unmask_dynirq(unsigned int irq)
+ {
+ int evtchn = evtchn_from_irq(irq);
+
+@@ -711,7 +703,7 @@ static void enable_dynirq(unsigned int i
+ unmask_evtchn(evtchn);
+ }
+
+-static void disable_dynirq(unsigned int irq)
++static void mask_dynirq(unsigned int irq)
+ {
+ int evtchn = evtchn_from_irq(irq);
+
+@@ -739,12 +731,13 @@ static void end_dynirq(unsigned int irq)
+ unmask_evtchn(evtchn);
+ }
+
+-static struct hw_interrupt_type dynirq_type = {
+- .typename = "Dynamic-irq",
++static struct irq_chip dynirq_chip = {
++ .name = "Dynamic",
+ .startup = startup_dynirq,
+- .shutdown = shutdown_dynirq,
+- .enable = enable_dynirq,
+- .disable = disable_dynirq,
++ .shutdown = mask_dynirq,
++ .mask = mask_dynirq,
++ .unmask = unmask_dynirq,
++ .mask_ack = ack_dynirq,
+ .ack = ack_dynirq,
+ .end = end_dynirq,
+ #ifdef CONFIG_SMP
+@@ -859,12 +852,12 @@ static void shutdown_pirq(unsigned int i
+ irq_info[irq] = mk_irq_info(IRQT_PIRQ, index_from_irq(irq), 0);
+ }
+
+-static void enable_pirq(unsigned int irq)
++static void unmask_pirq(unsigned int irq)
+ {
+ startup_pirq(irq);
+ }
+
+-static void disable_pirq(unsigned int irq)
++static void mask_pirq(unsigned int irq)
+ {
+ }
+
+@@ -891,12 +884,13 @@ static void end_pirq(unsigned int irq)
+ pirq_unmask_and_notify(evtchn, irq);
+ }
+
+-static struct hw_interrupt_type pirq_type = {
+- .typename = "Phys-irq",
++static struct irq_chip pirq_chip = {
++ .name = "Phys",
+ .startup = startup_pirq,
+ .shutdown = shutdown_pirq,
+- .enable = enable_pirq,
+- .disable = disable_pirq,
++ .mask = mask_pirq,
++ .unmask = unmask_pirq,
++ .mask_ack = ack_pirq,
+ .ack = ack_pirq,
+ .end = end_pirq,
+ #ifdef CONFIG_SMP
+@@ -1081,7 +1075,8 @@ void evtchn_register_pirq(int irq)
+ if (identity_mapped_irq(irq))
+ return;
+ irq_info[irq] = mk_irq_info(IRQT_PIRQ, irq, 0);
+- irq_desc[irq].chip = &pirq_type;
++ set_irq_chip_and_handler_name(irq, &pirq_chip, handle_level_irq,
++ "level");
+ }
+
+ int evtchn_map_pirq(int irq, int xen_pirq)
+@@ -1104,11 +1099,18 @@ int evtchn_map_pirq(int irq, int xen_pir
+ spin_unlock(&irq_alloc_lock);
+ if (irq < PIRQ_BASE)
+ return -ENOSPC;
+- irq_desc[irq].chip = &pirq_type;
++ set_irq_chip_and_handler_name(irq, &pirq_chip,
++ handle_level_irq, "level");
+ } else if (!xen_pirq) {
+ if (unlikely(type_from_irq(irq) != IRQT_PIRQ))
+ return -EINVAL;
+- irq_desc[irq].chip = &no_irq_type;
++ /*
++ * dynamic_irq_cleanup(irq) would seem to be the correct thing
++ * here, but cannot be used as we get here also during shutdown
++ * when a driver didn't free_irq() its MSI(-X) IRQ(s), which
++ * then causes a warning in dynamic_irq_cleanup().
++ */
++ set_irq_chip_and_handler(irq, NULL, NULL);
+ irq_info[irq] = IRQ_UNBOUND;
+ return 0;
+ } else if (type_from_irq(irq) != IRQT_PIRQ
+@@ -1153,10 +1155,9 @@ void __init xen_init_IRQ(void)
+ for (i = DYNIRQ_BASE; i < (DYNIRQ_BASE + NR_DYNIRQS); i++) {
+ irq_bindcount[i] = 0;
+
+- irq_desc[i].status = IRQ_DISABLED|IRQ_NOPROBE;
+- irq_desc[i].action = NULL;
+- irq_desc[i].depth = 1;
+- irq_desc[i].chip = &dynirq_type;
++ irq_desc[i].status |= IRQ_NOPROBE;
++ set_irq_chip_and_handler_name(i, &dynirq_chip,
++ handle_level_irq, "level");
+ }
+
+ /* Phys IRQ space is statically bound (1:1 mapping). Nail refcnts. */
+@@ -1172,9 +1173,7 @@ void __init xen_init_IRQ(void)
+ continue;
+ #endif
+
+- irq_desc[i].status = IRQ_DISABLED;
+- irq_desc[i].action = NULL;
+- irq_desc[i].depth = 1;
+- irq_desc[i].chip = &pirq_type;
++ set_irq_chip_and_handler_name(i, &pirq_chip,
++ handle_level_irq, "level");
+ }
+ }
+Index: head-2008-12-01/drivers/xen/core/reboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/reboot.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/reboot.c 2008-12-01 11:29:05.000000000 +0100
+@@ -14,6 +14,7 @@
+
+ #ifdef HAVE_XEN_PLATFORM_COMPAT_H
+ #include <xen/platform-compat.h>
++#undef handle_sysrq
+ #endif
+
+ MODULE_LICENSE("Dual BSD/GPL");
+@@ -231,7 +232,7 @@ static void sysrq_handler(struct xenbus_
+
+ #ifdef CONFIG_MAGIC_SYSRQ
+ if (sysrq_key != '\0')
+- handle_sysrq(sysrq_key, NULL, NULL);
++ handle_sysrq(sysrq_key, NULL);
+ #endif
+ }
+
+@@ -245,7 +246,7 @@ static struct xenbus_watch sysrq_watch =
+ .callback = sysrq_handler
+ };
+
+-static irqreturn_t suspend_int(int irq, void* dev_id, struct pt_regs *ptregs)
++static irqreturn_t suspend_int(int irq, void* dev_id)
+ {
+ switch_shutdown_state(SHUTDOWN_SUSPEND);
+ return IRQ_HANDLED;
+Index: head-2008-12-01/drivers/xen/core/smpboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/smpboot.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/smpboot.c 2008-12-01 11:29:05.000000000 +0100
+@@ -25,8 +25,8 @@
+ #include <xen/cpu_hotplug.h>
+ #include <xen/xenbus.h>
+
+-extern irqreturn_t smp_reschedule_interrupt(int, void *, struct pt_regs *);
+-extern irqreturn_t smp_call_function_interrupt(int, void *, struct pt_regs *);
++extern irqreturn_t smp_reschedule_interrupt(int, void *);
++extern irqreturn_t smp_call_function_interrupt(int, void *);
+
+ extern int local_setup_timer(unsigned int cpu);
+ extern void local_teardown_timer(unsigned int cpu);
+@@ -66,8 +66,6 @@ EXPORT_SYMBOL(cpu_core_map);
+ #if defined(__i386__)
+ u8 x86_cpu_to_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = 0xff };
+ EXPORT_SYMBOL(x86_cpu_to_apicid);
+-#elif !defined(CONFIG_X86_IO_APIC)
+-unsigned int maxcpus = NR_CPUS;
+ #endif
+
+ void __init prefill_possible_map(void)
+Index: head-2008-12-01/drivers/xen/fbfront/xenfb.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/fbfront/xenfb.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/fbfront/xenfb.c 2008-12-01 11:29:05.000000000 +0100
+@@ -523,8 +523,7 @@ static struct fb_ops xenfb_fb_ops = {
+ .fb_set_par = xenfb_set_par,
+ };
+
+-static irqreturn_t xenfb_event_handler(int rq, void *dev_id,
+- struct pt_regs *regs)
++static irqreturn_t xenfb_event_handler(int rq, void *dev_id)
+ {
+ /*
+ * No in events recognized, simply ignore them all.
+Index: head-2008-12-01/drivers/xen/fbfront/xenkbd.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/fbfront/xenkbd.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/fbfront/xenkbd.c 2008-12-01 11:29:05.000000000 +0100
+@@ -46,7 +46,7 @@ static void xenkbd_disconnect_backend(st
+ * to do that.
+ */
+
+-static irqreturn_t input_handler(int rq, void *dev_id, struct pt_regs *regs)
++static irqreturn_t input_handler(int rq, void *dev_id)
+ {
+ struct xenkbd_info *info = dev_id;
+ struct xenkbd_page *page = info->page;
+Index: head-2008-12-01/drivers/xen/gntdev/gntdev.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/gntdev/gntdev.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/gntdev/gntdev.c 2008-12-01 11:29:05.000000000 +0100
+@@ -752,9 +752,6 @@ static pte_t gntdev_clear_pte(struct vm_
+ BUG();
+ }
+
+- /* Copy the existing value of the PTE for returning. */
+- copy = *ptep;
+-
+ /* Calculate the grant relating to this PTE. */
+ slot_index = vma->vm_pgoff + ((addr - vma->vm_start) >> PAGE_SHIFT);
+
+@@ -769,6 +766,10 @@ static pte_t gntdev_clear_pte(struct vm_
+ GNTDEV_INVALID_HANDLE &&
+ !xen_feature(XENFEAT_auto_translated_physmap)) {
+ /* NOT USING SHADOW PAGE TABLES. */
++
++ /* Copy the existing value of the PTE for returning. */
++ copy = *ptep;
++
+ gnttab_set_unmap_op(&op, virt_to_machine(ptep),
+ GNTMAP_contains_pte,
+ private_data->grants[slot_index]
+@@ -781,7 +782,7 @@ static pte_t gntdev_clear_pte(struct vm_
+ op.status);
+ } else {
+ /* USING SHADOW PAGE TABLES. */
+- pte_clear_full(vma->vm_mm, addr, ptep, is_fullmm);
++ copy = ptep_get_and_clear_full(vma->vm_mm, addr, ptep, is_fullmm);
+ }
+
+ /* Finally, we unmap the grant from kernel space. */
+@@ -809,7 +810,7 @@ static pte_t gntdev_clear_pte(struct vm_
+ >> PAGE_SHIFT, INVALID_P2M_ENTRY);
+
+ } else {
+- pte_clear_full(vma->vm_mm, addr, ptep, is_fullmm);
++ copy = ptep_get_and_clear_full(vma->vm_mm, addr, ptep, is_fullmm);
+ }
+
+ return copy;
+Index: head-2008-12-01/drivers/xen/netback/accel.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/accel.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/accel.c 2008-12-01 11:29:05.000000000 +0100
+@@ -65,7 +65,7 @@ static int match_accelerator(struct xenb
+
+ if (IS_ERR(eth_name)) {
+ /* Probably means not present */
+- DPRINTK("%s: no match due to xenbus_read accel error %d\n",
++ DPRINTK("%s: no match due to xenbus_read accel error %ld\n",
+ __FUNCTION__, PTR_ERR(eth_name));
+ return 0;
+ } else {
+Index: head-2008-12-01/drivers/xen/netback/common.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/common.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/common.h 2008-12-01 11:29:05.000000000 +0100
+@@ -200,7 +200,7 @@ void netif_deschedule_work(netif_t *neti
+
+ int netif_be_start_xmit(struct sk_buff *skb, struct net_device *dev);
+ struct net_device_stats *netif_be_get_stats(struct net_device *dev);
+-irqreturn_t netif_be_int(int irq, void *dev_id, struct pt_regs *regs);
++irqreturn_t netif_be_int(int irq, void *dev_id);
+
+ static inline int netbk_can_queue(struct net_device *dev)
+ {
+Index: head-2008-12-01/drivers/xen/netback/loopback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/loopback.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/loopback.c 2008-12-01 11:29:05.000000000 +0100
+@@ -151,7 +151,7 @@ static int loopback_start_xmit(struct sk
+ np->stats.rx_bytes += skb->len;
+ np->stats.rx_packets++;
+
+- if (skb->ip_summed == CHECKSUM_HW) {
++ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ /* Defer checksum calculation. */
+ skb->proto_csum_blank = 1;
+ /* Must be a local packet: assert its integrity. */
+Index: head-2008-12-01/drivers/xen/netback/netback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/netback.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/netback.c 2008-12-01 11:29:05.000000000 +0100
+@@ -676,7 +676,7 @@ static void net_rx_action(unsigned long
+ id = meta[npo.meta_cons].id;
+ flags = nr_frags ? NETRXF_more_data : 0;
+
+- if (skb->ip_summed == CHECKSUM_HW) /* local packet? */
++ if (skb->ip_summed == CHECKSUM_PARTIAL) /* local packet? */
+ flags |= NETRXF_csum_blank | NETRXF_data_validated;
+ else if (skb->proto_data_valid) /* remote but checksummed? */
+ flags |= NETRXF_data_validated;
+@@ -1441,7 +1441,7 @@ static void netif_page_release(struct pa
+ netif_idx_release(netif_page_index(page));
+ }
+
+-irqreturn_t netif_be_int(int irq, void *dev_id, struct pt_regs *regs)
++irqreturn_t netif_be_int(int irq, void *dev_id)
+ {
+ netif_t *netif = dev_id;
+
+@@ -1508,7 +1508,7 @@ static netif_rx_response_t *make_rx_resp
+ }
+
+ #ifdef NETBE_DEBUG_INTERRUPT
+-static irqreturn_t netif_be_dbg(int irq, void *dev_id, struct pt_regs *regs)
++static irqreturn_t netif_be_dbg(int irq, void *dev_id)
+ {
+ struct list_head *ent;
+ netif_t *netif;
+Index: head-2008-12-01/drivers/xen/netfront/netfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netfront/netfront.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/netfront/netfront.c 2008-12-01 11:29:05.000000000 +0100
+@@ -136,7 +136,7 @@ static inline int netif_needs_gso(struct
+ {
+ return skb_is_gso(skb) &&
+ (!skb_gso_ok(skb, dev->features) ||
+- unlikely(skb->ip_summed != CHECKSUM_HW));
++ unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
+ }
+ #else
+ #define HAVE_GSO 0
+@@ -222,7 +222,7 @@ static void network_tx_buf_gc(struct net
+ static void network_alloc_rx_buffers(struct net_device *);
+ static void send_fake_arp(struct net_device *);
+
+-static irqreturn_t netif_int(int irq, void *dev_id, struct pt_regs *ptregs);
++static irqreturn_t netif_int(int irq, void *dev_id);
+
+ #ifdef CONFIG_SYSFS
+ static int xennet_sysfs_addif(struct net_device *netdev);
+@@ -992,7 +992,7 @@ static int network_start_xmit(struct sk_
+ tx->flags = 0;
+ extra = NULL;
+
+- if (skb->ip_summed == CHECKSUM_HW) /* local packet? */
++ if (skb->ip_summed == CHECKSUM_PARTIAL) /* local packet? */
+ tx->flags |= NETTXF_csum_blank | NETTXF_data_validated;
+ #ifdef CONFIG_XEN
+ if (skb->proto_data_valid) /* remote but checksummed? */
+@@ -1049,7 +1049,7 @@ static int network_start_xmit(struct sk_
+ return 0;
+ }
+
+-static irqreturn_t netif_int(int irq, void *dev_id, struct pt_regs *ptregs)
++static irqreturn_t netif_int(int irq, void *dev_id)
+ {
+ struct net_device *dev = dev_id;
+ struct netfront_info *np = netdev_priv(dev);
+Index: head-2008-12-01/drivers/xen/pciback/pciback.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pciback/pciback.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/pciback/pciback.h 2008-12-01 11:29:05.000000000 +0100
+@@ -87,7 +87,7 @@ int pciback_publish_pci_roots(struct pci
+ void pciback_release_devices(struct pciback_device *pdev);
+
+ /* Handles events from front-end */
+-irqreturn_t pciback_handle_event(int irq, void *dev_id, struct pt_regs *regs);
++irqreturn_t pciback_handle_event(int irq, void *dev_id);
+ void pciback_do_op(void *data);
+
+ int pciback_xenbus_register(void);
+Index: head-2008-12-01/drivers/xen/pciback/pciback_ops.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pciback/pciback_ops.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/pciback/pciback_ops.c 2008-12-01 11:29:05.000000000 +0100
+@@ -107,7 +107,7 @@ void pciback_do_op(void *data)
+ test_and_schedule_op(pdev);
+ }
+
+-irqreturn_t pciback_handle_event(int irq, void *dev_id, struct pt_regs *regs)
++irqreturn_t pciback_handle_event(int irq, void *dev_id)
+ {
+ struct pciback_device *pdev = dev_id;
+
+Index: head-2008-12-01/drivers/xen/pcifront/pci_op.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pcifront/pci_op.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/pcifront/pci_op.c 2008-12-01 11:29:05.000000000 +0100
+@@ -508,10 +508,16 @@ int __devinit pcifront_rescan_root(struc
+
+ d = pci_scan_single_device(b, devfn);
+ if (d) {
++ int err;
++
+ dev_info(&pdev->xdev->dev, "New device on "
+ "%04x:%02x:%02x.%02x found.\n", domain, bus,
+ PCI_SLOT(devfn), PCI_FUNC(devfn));
+- pci_bus_add_device(d);
++ err = pci_bus_add_device(d);
++ if (err)
++ dev_err(&pdev->xdev->dev,
++ "error %d adding device, continuing.\n",
++ err);
+ }
+ }
+
+Index: head-2008-12-01/drivers/xen/privcmd/compat_privcmd.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/privcmd/compat_privcmd.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/privcmd/compat_privcmd.c 2008-12-01 11:29:05.000000000 +0100
+@@ -18,7 +18,6 @@
+ * Authors: Jimi Xenidis <jimix@watson.ibm.com>
+ */
+
+-#include <linux/config.h>
+ #include <linux/compat.h>
+ #include <linux/ioctl.h>
+ #include <linux/syscalls.h>
+Index: head-2008-12-01/drivers/xen/privcmd/privcmd.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/privcmd/privcmd.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/privcmd/privcmd.c 2008-12-01 11:29:05.000000000 +0100
+@@ -40,7 +40,7 @@ static int privcmd_enforce_singleshot_ma
+ static long privcmd_ioctl(struct file *file,
+ unsigned int cmd, unsigned long data)
+ {
+- int ret = -ENOSYS;
++ long ret = -ENOSYS;
+ void __user *udata = (void __user *) data;
+
+ switch (cmd) {
+@@ -50,42 +50,15 @@ static long privcmd_ioctl(struct file *f
+ if (copy_from_user(&hypercall, udata, sizeof(hypercall)))
+ return -EFAULT;
+
+-#if defined(__i386__)
++#ifdef CONFIG_X86
+ if (hypercall.op >= (PAGE_SIZE >> 5))
+ break;
+- __asm__ __volatile__ (
+- "pushl %%ebx; pushl %%ecx; pushl %%edx; "
+- "pushl %%esi; pushl %%edi; "
+- "movl 8(%%eax),%%ebx ;"
+- "movl 16(%%eax),%%ecx ;"
+- "movl 24(%%eax),%%edx ;"
+- "movl 32(%%eax),%%esi ;"
+- "movl 40(%%eax),%%edi ;"
+- "movl (%%eax),%%eax ;"
+- "shll $5,%%eax ;"
+- "addl $hypercall_page,%%eax ;"
+- "call *%%eax ;"
+- "popl %%edi; popl %%esi; popl %%edx; "
+- "popl %%ecx; popl %%ebx"
+- : "=a" (ret) : "0" (&hypercall) : "memory" );
+-#elif defined (__x86_64__)
+- if (hypercall.op < (PAGE_SIZE >> 5)) {
+- long ign1, ign2, ign3;
+- __asm__ __volatile__ (
+- "movq %8,%%r10; movq %9,%%r8;"
+- "shll $5,%%eax ;"
+- "addq $hypercall_page,%%rax ;"
+- "call *%%rax"
+- : "=a" (ret), "=D" (ign1),
+- "=S" (ign2), "=d" (ign3)
+- : "0" ((unsigned int)hypercall.op),
+- "1" (hypercall.arg[0]),
+- "2" (hypercall.arg[1]),
+- "3" (hypercall.arg[2]),
+- "g" (hypercall.arg[3]),
+- "g" (hypercall.arg[4])
+- : "r8", "r10", "memory" );
+- }
++ ret = _hypercall(long, (unsigned int)hypercall.op,
++ (unsigned long)hypercall.arg[0],
++ (unsigned long)hypercall.arg[1],
++ (unsigned long)hypercall.arg[2],
++ (unsigned long)hypercall.arg[3],
++ (unsigned long)hypercall.arg[4]);
+ #else
+ ret = privcmd_hypercall(&hypercall);
+ #endif
+@@ -306,7 +279,7 @@ static int privcmd_mmap(struct file * fi
+ return -ENOSYS;
+
+ /* DONTCOPY is essential for Xen as copy_page_range is broken. */
+- vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY;
++ vma->vm_flags |= VM_RESERVED | VM_IO | VM_PFNMAP | VM_DONTCOPY;
+ vma->vm_ops = &privcmd_vm_ops;
+ vma->vm_private_data = NULL;
+
+Index: head-2008-12-01/drivers/xen/scsiback/common.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsiback/common.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsiback/common.h 2008-12-01 11:29:05.000000000 +0100
+@@ -142,7 +142,7 @@ typedef struct {
+ #define VSCSIIF_TIMEOUT (900*HZ)
+
+
+-irqreturn_t scsiback_intr(int, void *, struct pt_regs *);
++irqreturn_t scsiback_intr(int, void *);
+ int scsiback_init_sring(struct vscsibk_info *info,
+ unsigned long ring_ref, unsigned int evtchn);
+ int scsiback_schedule(void *data);
+Index: head-2008-12-01/drivers/xen/scsiback/scsiback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsiback/scsiback.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsiback/scsiback.c 2008-12-01 11:29:05.000000000 +0100
+@@ -440,7 +440,7 @@ void scsiback_cmd_exec(pending_req_t *pe
+ write = (data_dir == DMA_TO_DEVICE);
+ rq = blk_get_request(pending_req->sdev->request_queue, write, GFP_KERNEL);
+
+- rq->flags |= REQ_BLOCK_PC;
++ rq->cmd_type = REQ_TYPE_BLOCK_PC;
+ rq->cmd_len = cmd_len;
+ memcpy(rq->cmd, pending_req->cmnd, cmd_len);
+
+@@ -484,7 +484,7 @@ static void scsiback_device_reset_exec(p
+ }
+
+
+-irqreturn_t scsiback_intr(int irq, void *dev_id, struct pt_regs *regs)
++irqreturn_t scsiback_intr(int irq, void *dev_id)
+ {
+ scsiback_notify_work((struct vscsibk_info *)dev_id);
+ return IRQ_HANDLED;
+Index: head-2008-12-01/drivers/xen/scsifront/common.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsifront/common.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsifront/common.h 2008-12-01 11:29:05.000000000 +0100
+@@ -122,7 +122,7 @@ struct vscsifrnt_info {
+ int scsifront_xenbus_init(void);
+ void scsifront_xenbus_unregister(void);
+ int scsifront_schedule(void *data);
+-irqreturn_t scsifront_intr(int irq, void *dev_id, struct pt_regs *ptregs);
++irqreturn_t scsifront_intr(int irq, void *dev_id);
+ int scsifront_cmd_done(struct vscsifrnt_info *info);
+
+
+Index: head-2008-12-01/drivers/xen/scsifront/scsifront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsifront/scsifront.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsifront/scsifront.c 2008-12-01 11:29:05.000000000 +0100
+@@ -100,7 +100,7 @@ static void scsifront_do_request(struct
+ notify_remote_via_irq(irq);
+ }
+
+-irqreturn_t scsifront_intr(int irq, void *dev_id, struct pt_regs *ptregs)
++irqreturn_t scsifront_intr(int irq, void *dev_id)
+ {
+ scsifront_notify_work((struct vscsifrnt_info *)dev_id);
+ return IRQ_HANDLED;
+Index: head-2008-12-01/drivers/xen/sfc_netback/accel_xenbus.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netback/accel_xenbus.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netback/accel_xenbus.c 2008-12-01 11:29:05.000000000 +0100
+@@ -68,8 +68,7 @@ static void unlink_bend(struct netback_a
+
+
+ /* Demultiplex a message IRQ from the frontend driver. */
+-static irqreturn_t msgirq_from_frontend(int irq, void *context,
+- struct pt_regs *unused)
++static irqreturn_t msgirq_from_frontend(int irq, void *context)
+ {
+ struct xenbus_device *dev = context;
+ struct netback_accel *bend = NETBACK_ACCEL_FROM_XENBUS_DEVICE(dev);
+@@ -84,8 +83,7 @@ static irqreturn_t msgirq_from_frontend(
+ * functionally, but we need it to pass to the bind function, and may
+ * get called spuriously
+ */
+-static irqreturn_t netirq_from_frontend(int irq, void *context,
+- struct pt_regs *unused)
++static irqreturn_t netirq_from_frontend(int irq, void *context)
+ {
+ VPRINTK("netirq %d from device %s\n", irq,
+ ((struct xenbus_device *)context)->nodename);
+Index: head-2008-12-01/drivers/xen/sfc_netfront/accel.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netfront/accel.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netfront/accel.h 2008-12-01 11:29:05.000000000 +0100
+@@ -449,10 +449,8 @@ void netfront_accel_msg_tx_fastpath(netf
+ u32 ip, u16 port, u8 protocol);
+
+ /* Process an IRQ received from back end driver */
+-irqreturn_t netfront_accel_msg_channel_irq_from_bend(int irq, void *context,
+- struct pt_regs *unused);
+-irqreturn_t netfront_accel_net_channel_irq_from_bend(int irq, void *context,
+- struct pt_regs *unused);
++irqreturn_t netfront_accel_msg_channel_irq_from_bend(int irq, void *context);
++irqreturn_t netfront_accel_net_channel_irq_from_bend(int irq, void *context);
+
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+ extern void netfront_accel_msg_from_bend(struct work_struct *context);
+Index: head-2008-12-01/drivers/xen/sfc_netfront/accel_msg.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netfront/accel_msg.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netfront/accel_msg.c 2008-12-01 11:29:05.000000000 +0100
+@@ -490,8 +490,7 @@ void netfront_accel_msg_from_bend(void *
+ }
+
+
+-irqreturn_t netfront_accel_msg_channel_irq_from_bend(int irq, void *context,
+- struct pt_regs *unused)
++irqreturn_t netfront_accel_msg_channel_irq_from_bend(int irq, void *context)
+ {
+ netfront_accel_vnic *vnic = (netfront_accel_vnic *)context;
+ VPRINTK("irq %d from device %s\n", irq, vnic->dev->nodename);
+@@ -502,8 +501,7 @@ irqreturn_t netfront_accel_msg_channel_i
+ }
+
+ /* Process an interrupt received from the NIC via backend */
+-irqreturn_t netfront_accel_net_channel_irq_from_bend(int irq, void *context,
+- struct pt_regs *unused)
++irqreturn_t netfront_accel_net_channel_irq_from_bend(int irq, void *context)
+ {
+ netfront_accel_vnic *vnic = (netfront_accel_vnic *)context;
+ struct net_device *net_dev = vnic->net_dev;
+Index: head-2008-12-01/drivers/xen/sfc_netfront/accel_tso.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netfront/accel_tso.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netfront/accel_tso.c 2008-12-01 11:29:05.000000000 +0100
+@@ -363,7 +363,7 @@ int netfront_accel_enqueue_skb_tso(netfr
+
+ tso_check_safe(skb);
+
+- if (skb->ip_summed != CHECKSUM_HW)
++ if (skb->ip_summed != CHECKSUM_PARTIAL)
+ EPRINTK("Trying to TSO send a packet without HW checksum\n");
+
+ tso_start(&state, skb);
+Index: head-2008-12-01/drivers/xen/sfc_netfront/accel_vi.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netfront/accel_vi.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netfront/accel_vi.c 2008-12-01 11:29:05.000000000 +0100
+@@ -461,7 +461,7 @@ netfront_accel_enqueue_skb_multi(netfron
+
+ frag_i = -1;
+
+- if (skb->ip_summed == CHECKSUM_HW) {
++ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ /* Set to zero to encourage falcon to work it out for us */
+ *(u16*)(skb->h.raw + skb->csum) = 0;
+ }
+@@ -580,7 +580,7 @@ netfront_accel_enqueue_skb_single(netfro
+
+ kva = buf->pkt_kva;
+
+- if (skb->ip_summed == CHECKSUM_HW) {
++ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ /* Set to zero to encourage falcon to work it out for us */
+ *(u16*)(skb->h.raw + skb->csum) = 0;
+ }
+Index: head-2008-12-01/drivers/xen/tpmback/common.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/tpmback/common.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/tpmback/common.h 2008-12-01 11:29:05.000000000 +0100
+@@ -61,7 +61,7 @@ void tpmif_deschedule_work(tpmif_t * tpm
+ void tpmif_xenbus_init(void);
+ void tpmif_xenbus_exit(void);
+ int tpmif_map(tpmif_t *tpmif, unsigned long shared_page, unsigned int evtchn);
+-irqreturn_t tpmif_be_int(int irq, void *dev_id, struct pt_regs *regs);
++irqreturn_t tpmif_be_int(int irq, void *dev_id);
+
+ long int tpmback_get_instance(struct backend_info *bi);
+
+Index: head-2008-12-01/drivers/xen/tpmback/tpmback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/tpmback/tpmback.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/tpmback/tpmback.c 2008-12-01 11:29:05.000000000 +0100
+@@ -502,7 +502,7 @@ static ssize_t vtpm_op_read(struct file
+ list_del(&pak->next);
+ write_unlock_irqrestore(&dataex.pak_lock, flags);
+
+- DPRINTK("size given by app: %d, available: %d\n", size, left);
++ DPRINTK("size given by app: %zu, available: %u\n", size, left);
+
+ ret_size = min_t(size_t, size, left);
+
+@@ -899,7 +899,7 @@ static void tpm_tx_action(unsigned long
+ }
+ }
+
+-irqreturn_t tpmif_be_int(int irq, void *dev_id, struct pt_regs *regs)
++irqreturn_t tpmif_be_int(int irq, void *dev_id)
+ {
+ tpmif_t *tpmif = (tpmif_t *) dev_id;
+
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_comms.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_comms.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_comms.c 2008-12-01 11:29:05.000000000 +0100
+@@ -55,7 +55,7 @@ static DECLARE_WORK(probe_work, xenbus_p
+
+ static DECLARE_WAIT_QUEUE_HEAD(xb_waitq);
+
+-static irqreturn_t wake_waiting(int irq, void *unused, struct pt_regs *regs)
++static irqreturn_t wake_waiting(int irq, void *unused)
+ {
+ if (unlikely(xenstored_ready == 0)) {
+ xenstored_ready = 1;
+Index: head-2008-12-01/drivers/xen/xenoprof/xenoprofile.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenoprof/xenoprofile.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenoprof/xenoprofile.c 2008-12-01 11:29:05.000000000 +0100
+@@ -194,8 +194,7 @@ done:
+ oprofile_add_domain_switch(COORDINATOR_DOMAIN);
+ }
+
+-static irqreturn_t
+-xenoprof_ovf_interrupt(int irq, void * dev_id, struct pt_regs * regs)
++static irqreturn_t xenoprof_ovf_interrupt(int irq, void *dev_id)
+ {
+ struct xenoprof_buf * buf;
+ static unsigned long flag;
+Index: head-2008-12-01/include/asm-generic/pgtable.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-generic/pgtable.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-generic/pgtable.h 2008-12-01 11:29:05.000000000 +0100
+@@ -100,7 +100,7 @@ static inline void ptep_set_wrprotect(st
+ #endif
+
+ #ifndef arch_change_pte_range
+-#define arch_change_pte_range(mm, pmd, addr, end, newprot) 0
++#define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) 0
+ #endif
+
+ #ifndef __HAVE_ARCH_PTE_SAME
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/desc_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/desc_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/desc_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -32,52 +32,110 @@ static inline struct desc_struct *get_cp
+ return (struct desc_struct *)per_cpu(cpu_gdt_descr, cpu).address;
+ }
+
++/*
++ * This is the ldt that every process will get unless we need
++ * something other than this.
++ */
++extern struct desc_struct default_ldt[];
++extern struct desc_struct idt_table[];
++extern void set_intr_gate(unsigned int irq, void * addr);
++
++static inline void pack_descriptor(__u32 *a, __u32 *b,
++ unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
++{
++ *a = ((base & 0xffff) << 16) | (limit & 0xffff);
++ *b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
++ (limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
++}
++
++static inline void pack_gate(__u32 *a, __u32 *b,
++ unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
++{
++ *a = (seg << 16) | (base & 0xffff);
++ *b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
++}
++
++#define DESCTYPE_LDT 0x82 /* present, system, DPL-0, LDT */
++#define DESCTYPE_TSS 0x89 /* present, system, DPL-0, 32-bit TSS */
++#define DESCTYPE_TASK 0x85 /* present, system, DPL-0, task gate */
++#define DESCTYPE_INT 0x8e /* present, system, DPL-0, interrupt gate */
++#define DESCTYPE_TRAP 0x8f /* present, system, DPL-0, trap gate */
++#define DESCTYPE_DPL3 0x60 /* DPL-3 */
++#define DESCTYPE_S 0x10 /* !system */
++
+ #define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
+ #define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8))
+
+ #define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr))
+ #define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr))
+-#define load_tr(tr) __asm__ __volatile("ltr %0"::"mr" (tr))
+-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"mr" (ldt))
++#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
++#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+ #define store_gdt(dtr) __asm__ ("sgdt %0":"=m" (*dtr))
+ #define store_idt(dtr) __asm__ ("sidt %0":"=m" (*dtr))
+-#define store_tr(tr) __asm__ ("str %0":"=mr" (tr))
+-#define store_ldt(ldt) __asm__ ("sldt %0":"=mr" (ldt))
++#define store_tr(tr) __asm__ ("str %0":"=m" (tr))
++#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+
+-/*
+- * This is the ldt that every process will get unless we need
+- * something other than this.
+- */
+-extern struct desc_struct default_ldt[];
+-extern void set_intr_gate(unsigned int irq, void * addr);
++#if TLS_SIZE != 24
++# error update this code.
++#endif
++
++static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
++{
++#define C(i) if (HYPERVISOR_update_descriptor(virt_to_machine(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i]), \
++ *(u64 *)&t->tls_array[i]) \
++ BUG()
++ C(0); C(1); C(2);
++#undef C
++}
+
+-#define _set_tssldt_desc(n,addr,limit,type) \
+-__asm__ __volatile__ ("movw %w3,0(%2)\n\t" \
+- "movw %w1,2(%2)\n\t" \
+- "rorl $16,%1\n\t" \
+- "movb %b1,4(%2)\n\t" \
+- "movb %4,5(%2)\n\t" \
+- "movb $0,6(%2)\n\t" \
+- "movb %h1,7(%2)\n\t" \
+- "rorl $16,%1" \
+- : "=m"(*(n)) : "q" (addr), "r"(n), "ir"(limit), "i"(type))
++#ifndef CONFIG_XEN
++static inline void write_dt_entry(void *dt, int entry, __u32 entry_a, __u32 entry_b)
++{
++ __u32 *lp = (__u32 *)((char *)dt + entry*8);
++ *lp = entry_a;
++ *(lp+1) = entry_b;
++}
+
+-#ifndef CONFIG_X86_NO_TSS
+-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, void *addr)
++#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
++#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
++#else
++extern int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b);
++extern int write_gdt_entry(void *gdt, int entry, __u32 entry_a, __u32 entry_b);
++#endif
++#ifndef CONFIG_X86_NO_IDT
++#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
++
++static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
+ {
+- _set_tssldt_desc(&get_cpu_gdt_table(cpu)[entry], (int)addr,
+- offsetof(struct tss_struct, __cacheline_filler) - 1, 0x89);
++ __u32 a, b;
++ pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
++ write_idt_entry(idt_table, gate, a, b);
+ }
++#endif
+
+-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
++#ifndef CONFIG_X86_NO_TSS
++static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
++{
++ __u32 a, b;
++ pack_descriptor(&a, &b, (unsigned long)addr,
++ offsetof(struct tss_struct, __cacheline_filler) - 1,
++ DESCTYPE_TSS, 0);
++ write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
++}
+ #endif
+
+-static inline void set_ldt_desc(unsigned int cpu, void *addr, unsigned int size)
++static inline void set_ldt_desc(unsigned int cpu, void *addr, unsigned int entries)
+ {
+- _set_tssldt_desc(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT], (int)addr, ((size << 3)-1), 0x82);
++ __u32 a, b;
++ pack_descriptor(&a, &b, (unsigned long)addr,
++ entries * sizeof(struct desc_struct) - 1,
++ DESCTYPE_LDT, 0);
++ write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+ }
+
++#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
++
+ #define LDT_entry_a(info) \
+ ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
+
+@@ -103,21 +161,6 @@ static inline void set_ldt_desc(unsigned
+ (info)->seg_not_present == 1 && \
+ (info)->useable == 0 )
+
+-extern int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b);
+-
+-#if TLS_SIZE != 24
+-# error update this code.
+-#endif
+-
+-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
+-{
+-#define C(i) if (HYPERVISOR_update_descriptor(virt_to_machine(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i]), \
+- *(u64 *)&t->tls_array[i])) \
+- BUG();
+- C(0); C(1); C(2);
+-#undef C
+-}
+-
+ static inline void clear_LDT(void)
+ {
+ int cpu = get_cpu();
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -55,7 +55,7 @@ enum fixed_addresses {
+ #ifdef CONFIG_X86_LOCAL_APIC
+ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+ #endif
+-#ifdef CONFIG_X86_IO_APIC
++#if defined(CONFIG_X86_IO_APIC) && !defined(CONFIG_XEN)
+ FIX_IO_APIC_BASE_0,
+ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
+ #endif
+@@ -95,10 +95,9 @@ enum fixed_addresses {
+ __end_of_fixed_addresses
+ };
+
+-extern void set_fixaddr_top(unsigned long top);
+-
+ extern void __set_fixmap(enum fixed_addresses idx,
+ maddr_t phys, pgprot_t flags);
++extern void reserve_top_address(unsigned long reserve);
+
+ #define set_fixmap(idx, phys) \
+ __set_fixmap(idx, phys, PAGE_KERNEL)
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypercall_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -128,6 +128,23 @@
+ __res; \
+ })
+
++#define _hypercall(type, op, a1, a2, a3, a4, a5) \
++({ \
++ type __res; \
++ register typeof((a1)+0) __arg1 asm("ebx") = (a1); \
++ register typeof((a2)+0) __arg2 asm("ecx") = (a2); \
++ register typeof((a3)+0) __arg3 asm("edx") = (a3); \
++ register typeof((a4)+0) __arg4 asm("esi") = (a4); \
++ register typeof((a5)+0) __arg5 asm("edi") = (a5); \
++ asm volatile ( \
++ "call *%6" \
++ : "=a" (__res), "+r" (__arg1), "+r" (__arg2), \
++ "+r" (__arg3), "+r" (__arg4), "+r" (__arg5) \
++ : "0" (hypercall_page + (op) * 32) \
++ : "memory" ); \
++ __res; \
++})
++
+ static inline int __must_check
+ HYPERVISOR_set_trap_table(
+ const trap_info_t *table)
+@@ -140,6 +157,8 @@ HYPERVISOR_mmu_update(
+ mmu_update_t *req, unsigned int count, unsigned int *success_count,
+ domid_t domid)
+ {
++ if (arch_use_lazy_mmu_mode())
++ return xen_multi_mmu_update(req, count, success_count, domid);
+ return _hypercall4(int, mmu_update, req, count, success_count, domid);
+ }
+
+@@ -148,6 +167,8 @@ HYPERVISOR_mmuext_op(
+ struct mmuext_op *op, unsigned int count, unsigned int *success_count,
+ domid_t domid)
+ {
++ if (arch_use_lazy_mmu_mode())
++ return xen_multi_mmuext_op(op, count, success_count, domid);
+ return _hypercall4(int, mmuext_op, op, count, success_count, domid);
+ }
+
+@@ -238,6 +259,8 @@ static inline int __must_check
+ HYPERVISOR_memory_op(
+ unsigned int cmd, void *arg)
+ {
++ if (arch_use_lazy_mmu_mode())
++ xen_multicall_flush(false);
+ return _hypercall2(int, memory_op, cmd, arg);
+ }
+
+@@ -253,6 +276,9 @@ HYPERVISOR_update_va_mapping(
+ unsigned long va, pte_t new_val, unsigned long flags)
+ {
+ unsigned long pte_hi = 0;
++
++ if (arch_use_lazy_mmu_mode())
++ return xen_multi_update_va_mapping(va, new_val, flags);
+ #ifdef CONFIG_X86_PAE
+ pte_hi = new_val.pte_high;
+ #endif
+@@ -316,6 +342,8 @@ static inline int __must_check
+ HYPERVISOR_grant_table_op(
+ unsigned int cmd, void *uop, unsigned int count)
+ {
++ if (arch_use_lazy_mmu_mode())
++ xen_multicall_flush(false);
+ return _hypercall3(int, grant_table_op, cmd, uop, count);
+ }
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypercall_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -134,6 +134,23 @@
+ __res; \
+ })
+
++#define _hypercall(type, op, a1, a2, a3, a4, a5) \
++({ \
++ type __res; \
++ register typeof((a1)+0) __arg1 asm("rdi") = (a1); \
++ register typeof((a2)+0) __arg2 asm("rsi") = (a2); \
++ register typeof((a3)+0) __arg3 asm("rdx") = (a3); \
++ register typeof((a4)+0) __arg4 asm("r10") = (a4); \
++ register typeof((a5)+0) __arg5 asm("r8") = (a5); \
++ asm volatile ( \
++ "call *%6" \
++ : "=a" (__res), "+r" (__arg1), "+r" (__arg2), \
++ "+r" (__arg3), "+r" (__arg4), "+r" (__arg5) \
++ : "0" (hypercall_page + (op) * 32) \
++ : "memory" ); \
++ __res; \
++})
++
+ static inline int __must_check
+ HYPERVISOR_set_trap_table(
+ const trap_info_t *table)
+@@ -146,6 +163,8 @@ HYPERVISOR_mmu_update(
+ mmu_update_t *req, unsigned int count, unsigned int *success_count,
+ domid_t domid)
+ {
++ if (arch_use_lazy_mmu_mode())
++ return xen_multi_mmu_update(req, count, success_count, domid);
+ return _hypercall4(int, mmu_update, req, count, success_count, domid);
+ }
+
+@@ -154,6 +173,8 @@ HYPERVISOR_mmuext_op(
+ struct mmuext_op *op, unsigned int count, unsigned int *success_count,
+ domid_t domid)
+ {
++ if (arch_use_lazy_mmu_mode())
++ return xen_multi_mmuext_op(op, count, success_count, domid);
+ return _hypercall4(int, mmuext_op, op, count, success_count, domid);
+ }
+
+@@ -241,6 +262,8 @@ static inline int __must_check
+ HYPERVISOR_memory_op(
+ unsigned int cmd, void *arg)
+ {
++ if (arch_use_lazy_mmu_mode())
++ xen_multicall_flush(false);
+ return _hypercall2(int, memory_op, cmd, arg);
+ }
+
+@@ -255,6 +278,8 @@ static inline int __must_check
+ HYPERVISOR_update_va_mapping(
+ unsigned long va, pte_t new_val, unsigned long flags)
+ {
++ if (arch_use_lazy_mmu_mode())
++ return xen_multi_update_va_mapping(va, new_val, flags);
+ return _hypercall3(int, update_va_mapping, va, new_val.pte, flags);
+ }
+
+@@ -314,6 +339,8 @@ static inline int __must_check
+ HYPERVISOR_grant_table_op(
+ unsigned int cmd, void *uop, unsigned int count)
+ {
++ if (arch_use_lazy_mmu_mode())
++ xen_multicall_flush(false);
+ return _hypercall3(int, grant_table_op, cmd, uop, count);
+ }
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 11:29:05.000000000 +0100
+@@ -43,6 +43,7 @@
+ #include <xen/interface/physdev.h>
+ #include <xen/interface/sched.h>
+ #include <xen/interface/nmi.h>
++#include <asm/percpu.h>
+ #include <asm/ptrace.h>
+ #include <asm/page.h>
+ #if defined(__i386__)
+@@ -135,7 +136,46 @@ void scrub_pages(void *, unsigned int);
+ #define scrub_pages(_p,_n) ((void)0)
+ #endif
+
+-#include <xen/hypercall.h>
++#ifdef CONFIG_XEN
++
++DECLARE_PER_CPU(bool, xen_lazy_mmu);
++
++int xen_multicall_flush(bool);
++
++int __must_check xen_multi_update_va_mapping(unsigned long va, pte_t,
++ unsigned long flags);
++int __must_check xen_multi_mmu_update(mmu_update_t *, unsigned int count,
++ unsigned int *success_count, domid_t);
++int __must_check xen_multi_mmuext_op(struct mmuext_op *, unsigned int count,
++ unsigned int *success_count, domid_t);
++
++#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
++static inline void arch_enter_lazy_mmu_mode(void)
++{
++ __get_cpu_var(xen_lazy_mmu) = true;
++}
++
++static inline void arch_leave_lazy_mmu_mode(void)
++{
++ __get_cpu_var(xen_lazy_mmu) = false;
++ xen_multicall_flush(false);
++}
++
++#if defined(CONFIG_X86_32)
++#define arch_use_lazy_mmu_mode() unlikely(x86_read_percpu(xen_lazy_mmu))
++#elif !defined(arch_use_lazy_mmu_mode)
++#define arch_use_lazy_mmu_mode() unlikely(__get_cpu_var(xen_lazy_mmu))
++#endif
++
++#else /* CONFIG_XEN */
++
++static inline void xen_multicall_flush(bool ignore) {}
++#define arch_use_lazy_mmu_mode() false
++#define xen_multi_update_va_mapping(...) ({ BUG(); -ENOSYS; })
++#define xen_multi_mmu_update(...) ({ BUG(); -ENOSYS; })
++#define xen_multi_mmuext_op(...) ({ BUG(); -ENOSYS; })
++
++#endif /* CONFIG_XEN */
+
+ #if defined(CONFIG_X86_64)
+ #define MULTI_UVMFLAGS_INDEX 2
+@@ -147,11 +187,15 @@ void scrub_pages(void *, unsigned int);
+
+ #ifdef CONFIG_XEN
+ #define is_running_on_xen() 1
++extern char hypercall_page[PAGE_SIZE];
+ #else
+ extern char *hypercall_stubs;
++#define hypercall_page hypercall_stubs
+ #define is_running_on_xen() (!!hypercall_stubs)
+ #endif
+
++#include <xen/hypercall.h>
++
+ static inline int
+ HYPERVISOR_yield(
+ void)
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -237,33 +237,6 @@ static inline void memcpy_toio(volatile
+
+ #define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void __force *)(b),(c),(d))
+
+-/**
+- * check_signature - find BIOS signatures
+- * @io_addr: mmio address to check
+- * @signature: signature block
+- * @length: length of signature
+- *
+- * Perform a signature comparison with the mmio address io_addr. This
+- * address should have been obtained by ioremap.
+- * Returns 1 on a match.
+- */
+-
+-static inline int check_signature(volatile void __iomem * io_addr,
+- const unsigned char *signature, int length)
+-{
+- int retval = 0;
+- do {
+- if (readb(io_addr) != *signature)
+- goto out;
+- io_addr++;
+- signature++;
+- length--;
+- } while (length);
+- retval = 1;
+-out:
+- return retval;
+-}
+-
+ /*
+ * Cache management
+ *
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 11:29:05.000000000 +0100
+@@ -53,7 +53,6 @@ static inline int pte_exec_kernel(pte_t
+ * not possible, use pte_get_and_clear to obtain the old pte
+ * value and then use set_pte to update it. -ben
+ */
+-#define __HAVE_ARCH_SET_PTE_ATOMIC
+
+ static inline void set_pte(pte_t *ptep, pte_t pte)
+ {
+@@ -70,14 +69,6 @@ static inline void set_pte(pte_t *ptep,
+ set_pte((ptep), (pteval)); \
+ } while (0)
+
+-#define set_pte_at_sync(_mm,addr,ptep,pteval) do { \
+- if (((_mm) != current->mm && (_mm) != &init_mm) || \
+- HYPERVISOR_update_va_mapping((addr), (pteval), UVMF_INVLPG)) { \
+- set_pte((ptep), (pteval)); \
+- xen_invlpg((addr)); \
+- } \
+-} while (0)
+-
+ #define set_pmd(pmdptr,pmdval) \
+ xen_l2_entry_update((pmdptr), (pmdval))
+ #define set_pud(pudptr,pudval) \
+@@ -94,7 +85,7 @@ static inline void pud_clear (pud_t * pu
+ #define pud_page(pud) \
+ ((struct page *) __va(pud_val(pud) & PAGE_MASK))
+
+-#define pud_page_kernel(pud) \
++#define pud_page_vaddr(pud) \
+ ((unsigned long) __va(pud_val(pud) & PAGE_MASK))
+
+
+@@ -124,6 +115,7 @@ static inline void pte_clear(struct mm_s
+
+ #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
+
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+ {
+ pte_t pte = *ptep;
+@@ -142,6 +134,7 @@ static inline pte_t ptep_get_and_clear(s
+ return pte;
+ }
+
++#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+ #define ptep_clear_flush(vma, addr, ptep) \
+ ({ \
+ pte_t *__ptep = (ptep); \
+@@ -159,6 +152,7 @@ static inline pte_t ptep_get_and_clear(s
+ __res; \
+ })
+
++#define __HAVE_ARCH_PTE_SAME
+ static inline int pte_same(pte_t a, pte_t b)
+ {
+ return a.pte_low == b.pte_low && a.pte_high == b.pte_high;
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -260,31 +260,89 @@ static inline pte_t pte_mkhuge(pte_t pte
+ # include <asm/pgtable-2level.h>
+ #endif
+
+-#define ptep_test_and_clear_dirty(vma, addr, ptep) \
++/*
++ * Rules for using pte_update - it must be called after any PTE update which
++ * has not been done using the set_pte / clear_pte interfaces. It is used by
++ * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
++ * updates should either be sets, clears, or set_pte_atomic for P->P
++ * transitions, which means this hook should only be called for user PTEs.
++ * This hook implies a P->P protection or access change has taken place, which
++ * requires a subsequent TLB flush. The notification can optionally be delayed
++ * until the TLB flush event by using the pte_update_defer form of the
++ * interface, but care must be taken to assure that the flush happens while
++ * still holding the same page table lock so that the shadow and primary pages
++ * do not become out of sync on SMP.
++ */
++#define pte_update(mm, addr, ptep) do { } while (0)
++#define pte_update_defer(mm, addr, ptep) do { } while (0)
++
++
++/*
++ * We only update the dirty/accessed state if we set
++ * the dirty bit by hand in the kernel, since the hardware
++ * will do the accessed bit for us, and we don't want to
++ * race with other CPU's that might be updating the dirty
++ * bit at the same time.
++ */
++#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
++#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
++do { \
++ if (dirty) \
++ ptep_establish(vma, address, ptep, entry); \
++} while (0)
++
++/*
++ * We don't actually have these, but we want to advertise them so that
++ * we can encompass the flush here.
++ */
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
++
++/*
++ * Rules for using ptep_establish: the pte MUST be a user pte, and
++ * must be a present->present transition.
++ */
++#define __HAVE_ARCH_PTEP_ESTABLISH
++#define ptep_establish(vma, address, ptep, pteval) \
++do { \
++ if ( likely((vma)->vm_mm == current->mm) ) { \
++ BUG_ON(HYPERVISOR_update_va_mapping(address, \
++ pteval, \
++ (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
++ UVMF_INVLPG|UVMF_MULTI)); \
++ } else { \
++ xen_l1_entry_update(ptep, pteval); \
++ flush_tlb_page(vma, address); \
++ } \
++} while (0)
++
++#define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
++#define ptep_clear_flush_dirty(vma, address, ptep) \
+ ({ \
+ pte_t __pte = *(ptep); \
+- int __ret = pte_dirty(__pte); \
+- if (__ret) { \
+- __pte = pte_mkclean(__pte); \
+- if ((vma)->vm_mm != current->mm || \
+- HYPERVISOR_update_va_mapping(addr, __pte, 0)) \
+- (ptep)->pte_low = __pte.pte_low; \
+- } \
+- __ret; \
++ int __dirty = pte_dirty(__pte); \
++ __pte = pte_mkclean(__pte); \
++ if (test_bit(PG_pinned, &virt_to_page((vma)->vm_mm->pgd)->flags)) \
++ ptep_set_access_flags(vma, address, ptep, __pte, __dirty); \
++ else if (__dirty) \
++ (ptep)->pte_low = __pte.pte_low; \
++ __dirty; \
+ })
+
+-#define ptep_test_and_clear_young(vma, addr, ptep) \
++#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
++#define ptep_clear_flush_young(vma, address, ptep) \
+ ({ \
+ pte_t __pte = *(ptep); \
+- int __ret = pte_young(__pte); \
+- if (__ret) \
+- __pte = pte_mkold(__pte); \
+- if ((vma)->vm_mm != current->mm || \
+- HYPERVISOR_update_va_mapping(addr, __pte, 0)) \
+- (ptep)->pte_low = __pte.pte_low; \
+- __ret; \
++ int __young = pte_young(__pte); \
++ __pte = pte_mkold(__pte); \
++ if (test_bit(PG_pinned, &virt_to_page((vma)->vm_mm->pgd)->flags)) \
++ ptep_set_access_flags(vma, address, ptep, __pte, __young); \
++ else if (__young) \
++ (ptep)->pte_low = __pte.pte_low; \
++ __young; \
+ })
+
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
+ #define ptep_get_and_clear_full(mm, addr, ptep, full) \
+ ((full) ? ({ \
+ pte_t __res = *(ptep); \
+@@ -296,6 +354,7 @@ static inline pte_t pte_mkhuge(pte_t pte
+ }) : \
+ ptep_get_and_clear(mm, addr, ptep))
+
++#define __HAVE_ARCH_PTEP_SET_WRPROTECT
+ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+ {
+ pte_t pte = *ptep;
+@@ -391,11 +450,11 @@ static inline pte_t pte_modify(pte_t pte
+ #define pte_index(address) \
+ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+ #define pte_offset_kernel(dir, address) \
+- ((pte_t *) pmd_page_kernel(*(dir)) + pte_index(address))
++ ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
+
+ #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+
+-#define pmd_page_kernel(pmd) \
++#define pmd_page_vaddr(pmd) \
+ ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
+
+ /*
+@@ -418,8 +477,6 @@ extern pte_t *lookup_address(unsigned lo
+ static inline int set_kernel_exec(unsigned long vaddr, int enable) { return 0;}
+ #endif
+
+-extern void noexec_setup(const char *str);
+-
+ #if defined(CONFIG_HIGHPTE)
+ #define pte_offset_map(dir, address) \
+ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + \
+@@ -437,37 +494,17 @@ extern void noexec_setup(const char *str
+ #define pte_unmap_nested(pte) do { } while (0)
+ #endif
+
+-#define __HAVE_ARCH_PTEP_ESTABLISH
+-#define ptep_establish(vma, address, ptep, pteval) \
+- do { \
+- if ( likely((vma)->vm_mm == current->mm) ) { \
+- BUG_ON(HYPERVISOR_update_va_mapping(address, \
+- pteval, \
+- (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
+- UVMF_INVLPG|UVMF_MULTI)); \
+- } else { \
+- xen_l1_entry_update(ptep, pteval); \
+- flush_tlb_page(vma, address); \
+- } \
+- } while (0)
++/* Clear a kernel PTE and flush it from the TLB */
++#define kpte_clear_flush(ptep, vaddr) do { \
++ if (HYPERVISOR_update_va_mapping(vaddr, __pte(0), UVMF_INVLPG)) \
++ BUG(); \
++} while (0)
+
+ /*
+ * The i386 doesn't have any external MMU info: the kernel page
+ * tables contain all the necessary information.
+- *
+- * Also, we only update the dirty/accessed state if we set
+- * the dirty bit by hand in the kernel, since the hardware
+- * will do the accessed bit for us, and we don't want to
+- * race with other CPU's that might be updating the dirty
+- * bit at the same time.
+ */
+ #define update_mmu_cache(vma,address,pte) do { } while (0)
+-#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+-#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
+- do { \
+- if (dirty) \
+- ptep_establish(vma, address, ptep, entry); \
+- } while (0)
+
+ #include <xen/features.h>
+ void make_lowmem_page_readonly(void *va, unsigned int feature);
+@@ -513,10 +550,11 @@ int touch_pte_range(struct mm_struct *mm
+ unsigned long size);
+
+ int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
+- unsigned long addr, unsigned long end, pgprot_t newprot);
++ unsigned long addr, unsigned long end, pgprot_t newprot,
++ int dirty_accountable);
+
+-#define arch_change_pte_range(mm, pmd, addr, end, newprot) \
+- xen_change_pte_range(mm, pmd, addr, end, newprot)
++#define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) \
++ xen_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable)
+
+ #define io_remap_pfn_range(vma,from,pfn,size,prot) \
+ direct_remap_pfn_range(vma,from,pfn,size,prot,DOMID_IO)
+@@ -525,13 +563,6 @@ direct_remap_pfn_range(vma,from,pfn,size
+ #define GET_IOSPACE(pfn) 0
+ #define GET_PFN(pfn) (pfn)
+
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
+-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
+-#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
+-#define __HAVE_ARCH_PTE_SAME
+ #include <asm-generic/pgtable.h>
+
+ #endif /* _I386_PGTABLE_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -146,6 +146,18 @@ static inline void detect_ht(struct cpui
+ #define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
+ #define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
+
++static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
++ unsigned int *ecx, unsigned int *edx)
++{
++ /* ecx is often an input as well as an output. */
++ __asm__(XEN_CPUID
++ : "=a" (*eax),
++ "=b" (*ebx),
++ "=c" (*ecx),
++ "=d" (*edx)
++ : "0" (*eax), "2" (*ecx));
++}
++
+ /*
+ * Generic CPUID function
+ * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
+@@ -153,24 +165,18 @@ static inline void detect_ht(struct cpui
+ */
+ static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx)
+ {
+- __asm__(XEN_CPUID
+- : "=a" (*eax),
+- "=b" (*ebx),
+- "=c" (*ecx),
+- "=d" (*edx)
+- : "0" (op), "c"(0));
++ *eax = op;
++ *ecx = 0;
++ __cpuid(eax, ebx, ecx, edx);
+ }
+
+ /* Some CPUID calls want 'count' to be placed in ecx */
+ static inline void cpuid_count(int op, int count, int *eax, int *ebx, int *ecx,
+- int *edx)
++ int *edx)
+ {
+- __asm__(XEN_CPUID
+- : "=a" (*eax),
+- "=b" (*ebx),
+- "=c" (*ecx),
+- "=d" (*edx)
+- : "0" (op), "c" (count));
++ *eax = op;
++ *ecx = count;
++ __cpuid(eax, ebx, ecx, edx);
+ }
+
+ /*
+@@ -178,42 +184,30 @@ static inline void cpuid_count(int op, i
+ */
+ static inline unsigned int cpuid_eax(unsigned int op)
+ {
+- unsigned int eax;
++ unsigned int eax, ebx, ecx, edx;
+
+- __asm__(XEN_CPUID
+- : "=a" (eax)
+- : "0" (op)
+- : "bx", "cx", "dx");
++ cpuid(op, &eax, &ebx, &ecx, &edx);
+ return eax;
+ }
+ static inline unsigned int cpuid_ebx(unsigned int op)
+ {
+- unsigned int eax, ebx;
++ unsigned int eax, ebx, ecx, edx;
+
+- __asm__(XEN_CPUID
+- : "=a" (eax), "=b" (ebx)
+- : "0" (op)
+- : "cx", "dx" );
++ cpuid(op, &eax, &ebx, &ecx, &edx);
+ return ebx;
+ }
+ static inline unsigned int cpuid_ecx(unsigned int op)
+ {
+- unsigned int eax, ecx;
++ unsigned int eax, ebx, ecx, edx;
+
+- __asm__(XEN_CPUID
+- : "=a" (eax), "=c" (ecx)
+- : "0" (op)
+- : "bx", "dx" );
++ cpuid(op, &eax, &ebx, &ecx, &edx);
+ return ecx;
+ }
+ static inline unsigned int cpuid_edx(unsigned int op)
+ {
+- unsigned int eax, edx;
++ unsigned int eax, ebx, ecx, edx;
+
+- __asm__(XEN_CPUID
+- : "=a" (eax), "=d" (edx)
+- : "0" (op)
+- : "bx", "cx");
++ cpuid(op, &eax, &ebx, &ecx, &edx);
+ return edx;
+ }
+
+@@ -315,6 +309,8 @@ static inline void __mwait(unsigned long
+ : :"a" (eax), "c" (ecx));
+ }
+
++extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
++
+ /* from system description table in BIOS. Mostly for MCA use, but
+ others may find it useful. */
+ extern unsigned int machine_id;
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/segment_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/segment_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/segment_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -61,11 +61,9 @@
+
+ #define GDT_ENTRY_KERNEL_CS (GDT_ENTRY_KERNEL_BASE + 0)
+ #define __KERNEL_CS (GDT_ENTRY_KERNEL_CS * 8)
+-#define GET_KERNEL_CS() (__KERNEL_CS | (xen_feature(XENFEAT_supervisor_mode_kernel)?0:1) )
+
+ #define GDT_ENTRY_KERNEL_DS (GDT_ENTRY_KERNEL_BASE + 1)
+ #define __KERNEL_DS (GDT_ENTRY_KERNEL_DS * 8)
+-#define GET_KERNEL_DS() (__KERNEL_DS | (xen_feature(XENFEAT_supervisor_mode_kernel)?0:1) )
+
+ #define GDT_ENTRY_TSS (GDT_ENTRY_KERNEL_BASE + 4)
+ #define GDT_ENTRY_LDT (GDT_ENTRY_KERNEL_BASE + 5)
+@@ -85,6 +83,11 @@
+
+ #define GDT_SIZE (GDT_ENTRIES * 8)
+
++/* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */
++#define SEGMENT_IS_FLAT_CODE(x) (((x) & 0xec) == GDT_ENTRY_KERNEL_CS * 8)
++/* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
++#define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8)
++
+ /* Simple and small GDT entries for booting only */
+
+ #define GDT_ENTRY_BOOT_CS 2
+@@ -114,4 +117,16 @@
+ */
+ #define IDT_ENTRIES 256
+
++/* Bottom two bits of selector give the ring privilege level */
++#define SEGMENT_RPL_MASK 0x3
++/* Bit 2 is table indicator (LDT/GDT) */
++#define SEGMENT_TI_MASK 0x4
++
++/* User mode is privilege level 3 */
++#define USER_RPL 0x3
++/* LDT segment has TI set, GDT has it cleared */
++#define SEGMENT_LDT 0x4
++#define SEGMENT_GDT 0x0
++
++#define get_kernel_rpl() (xen_feature(XENFEAT_supervisor_mode_kernel)?0:1)
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/smp_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/smp_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/smp_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -79,25 +79,36 @@ static inline int hard_smp_processor_id(
+ return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
+ }
+ #endif
+-
+-static __inline int logical_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
+-}
+-
+ #endif
+
++#define safe_smp_processor_id() smp_processor_id()
+ extern int __cpu_disable(void);
+ extern void __cpu_die(unsigned int cpu);
+ extern void prefill_possible_map(void);
++extern unsigned int num_processors;
++
+ #endif /* !__ASSEMBLY__ */
+
+ #else /* CONFIG_SMP */
+
++#define safe_smp_processor_id() 0
+ #define cpu_physical_id(cpu) boot_cpu_physical_apicid
+
+ #define NO_PROC_ID 0xFF /* No processor magic marker */
+
+ #endif
++
++#ifndef __ASSEMBLY__
++
++extern u8 apicid_2_node[];
++
++#ifdef CONFIG_X86_LOCAL_APIC
++static __inline int logical_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
++}
++#endif
++#endif
++
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/system_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -267,6 +267,9 @@ static inline unsigned long __xchg(unsig
+ #define cmpxchg(ptr,o,n)\
+ ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
+ (unsigned long)(n),sizeof(*(ptr))))
++#define sync_cmpxchg(ptr,o,n)\
++ ((__typeof__(*(ptr)))__sync_cmpxchg((ptr),(unsigned long)(o),\
++ (unsigned long)(n),sizeof(*(ptr))))
+ #endif
+
+ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
+@@ -296,6 +299,39 @@ static inline unsigned long __cmpxchg(vo
+ return old;
+ }
+
++/*
++ * Always use locked operations when touching memory shared with a
++ * hypervisor, since the system may be SMP even if the guest kernel
++ * isn't.
++ */
++static inline unsigned long __sync_cmpxchg(volatile void *ptr,
++ unsigned long old,
++ unsigned long new, int size)
++{
++ unsigned long prev;
++ switch (size) {
++ case 1:
++ __asm__ __volatile__("lock; cmpxchgb %b1,%2"
++ : "=a"(prev)
++ : "q"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ case 2:
++ __asm__ __volatile__("lock; cmpxchgw %w1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ case 4:
++ __asm__ __volatile__("lock; cmpxchgl %1,%2"
++ : "=a"(prev)
++ : "r"(new), "m"(*__xg(ptr)), "0"(old)
++ : "memory");
++ return prev;
++ }
++ return old;
++}
++
+ #ifndef CONFIG_X86_CMPXCHG
+ /*
+ * Building a kernel capable running on 80386. It may be necessary to
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/tlbflush_32.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_32.h 2008-12-01 11:29:05.000000000 +0100
+@@ -8,8 +8,6 @@
+ #define __flush_tlb_global() xen_tlb_flush()
+ #define __flush_tlb_all() xen_tlb_flush()
+
+-extern unsigned long pgkern_mask;
+-
+ #define cpu_has_invlpg (boot_cpu_data.x86 > 3)
+
+ #define __flush_tlb_single(addr) xen_invlpg(addr)
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/dma-mapping_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -55,13 +55,6 @@ extern dma_addr_t bad_dma_address;
+ extern struct dma_mapping_ops* dma_ops;
+ extern int iommu_merge;
+
+-static inline int valid_dma_direction(int dma_direction)
+-{
+- return ((dma_direction == DMA_BIDIRECTIONAL) ||
+- (dma_direction == DMA_TO_DEVICE) ||
+- (dma_direction == DMA_FROM_DEVICE));
+-}
+-
+ #if 0
+ static inline int dma_mapping_error(dma_addr_t dma_addr)
+ {
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/fixmap_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -41,7 +41,7 @@ enum fixed_addresses {
+ #ifdef CONFIG_X86_LOCAL_APIC
+ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+ #endif
+-#ifdef CONFIG_X86_IO_APIC
++#ifndef CONFIG_XEN
+ FIX_IO_APIC_BASE_0,
+ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -273,33 +273,6 @@ void memset_io(volatile void __iomem *a,
+
+ #define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void *)(b),(c),(d))
+
+-/**
+- * check_signature - find BIOS signatures
+- * @io_addr: mmio address to check
+- * @signature: signature block
+- * @length: length of signature
+- *
+- * Perform a signature comparison with the mmio address io_addr. This
+- * address should have been obtained by ioremap.
+- * Returns 1 on a match.
+- */
+-
+-static inline int check_signature(void __iomem *io_addr,
+- const unsigned char *signature, int length)
+-{
+- int retval = 0;
+- do {
+- if (readb(io_addr) != *signature)
+- goto out;
+- io_addr++;
+- signature++;
+- length--;
+- } while (length);
+- retval = 1;
+-out:
+- return retval;
+-}
+-
+ /* Nothing to do */
+
+ #define dma_cache_inv(_start,_size) do { } while (0)
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -42,12 +42,9 @@ extern unsigned long __supported_pte_mas
+
+ #define swapper_pg_dir init_level4_pgt
+
+-extern int nonx_setup(char *str);
+ extern void paging_init(void);
+ extern void clear_kernel_mapping(unsigned long addr, unsigned long size);
+
+-extern unsigned long pgkern_mask;
+-
+ /*
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+@@ -117,9 +114,6 @@ static inline void pgd_clear (pgd_t * pg
+ set_pgd(__user_pgd(pgd), __pgd(0));
+ }
+
+-#define pud_page(pud) \
+- ((unsigned long) __va(pud_val(pud) & PHYSICAL_PAGE_MASK))
+-
+ #define pte_same(a, b) ((a).pte == (b).pte)
+
+ #define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK))
+@@ -331,7 +325,7 @@ static inline pte_t ptep_get_and_clear_f
+ #define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT)
+ static inline int pte_user(pte_t pte) { return __pte_val(pte) & _PAGE_USER; }
+ static inline int pte_read(pte_t pte) { return __pte_val(pte) & _PAGE_USER; }
+-static inline int pte_exec(pte_t pte) { return __pte_val(pte) & _PAGE_USER; }
++static inline int pte_exec(pte_t pte) { return !(__pte_val(pte) & _PAGE_NX); }
+ static inline int pte_dirty(pte_t pte) { return __pte_val(pte) & _PAGE_DIRTY; }
+ static inline int pte_young(pte_t pte) { return __pte_val(pte) & _PAGE_ACCESSED; }
+ static inline int pte_write(pte_t pte) { return __pte_val(pte) & _PAGE_RW; }
+@@ -344,29 +338,12 @@ static inline pte_t pte_mkclean(pte_t pt
+ static inline pte_t pte_mkold(pte_t pte) { __pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
+ static inline pte_t pte_wrprotect(pte_t pte) { __pte_val(pte) &= ~_PAGE_RW; return pte; }
+ static inline pte_t pte_mkread(pte_t pte) { __pte_val(pte) |= _PAGE_USER; return pte; }
+-static inline pte_t pte_mkexec(pte_t pte) { __pte_val(pte) |= _PAGE_USER; return pte; }
++static inline pte_t pte_mkexec(pte_t pte) { __pte_val(pte) &= ~_PAGE_NX; return pte; }
+ static inline pte_t pte_mkdirty(pte_t pte) { __pte_val(pte) |= _PAGE_DIRTY; return pte; }
+ static inline pte_t pte_mkyoung(pte_t pte) { __pte_val(pte) |= _PAGE_ACCESSED; return pte; }
+ static inline pte_t pte_mkwrite(pte_t pte) { __pte_val(pte) |= _PAGE_RW; return pte; }
+ static inline pte_t pte_mkhuge(pte_t pte) { __pte_val(pte) |= _PAGE_PSE; return pte; }
+-
+-#define ptep_test_and_clear_dirty(vma, addr, ptep) \
+-({ \
+- pte_t __pte = *(ptep); \
+- int __ret = pte_dirty(__pte); \
+- if (__ret) \
+- set_pte_at((vma)->vm_mm, addr, ptep, pte_mkclean(__pte)); \
+- __ret; \
+-})
+-
+-#define ptep_test_and_clear_young(vma, addr, ptep) \
+-({ \
+- pte_t __pte = *(ptep); \
+- int __ret = pte_young(__pte); \
+- if (__ret) \
+- set_pte_at((vma)->vm_mm, addr, ptep, pte_mkold(__pte)); \
+- __ret; \
+-})
++static inline pte_t pte_clrhuge(pte_t pte) { __pte_val(pte) &= ~_PAGE_PSE; return pte; }
+
+ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+ {
+@@ -393,7 +370,8 @@ static inline int pmd_large(pmd_t pte) {
+ /*
+ * Level 4 access.
+ */
+-#define pgd_page(pgd) ((unsigned long) __va(pgd_val(pgd) & PTE_MASK))
++#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_val(pgd) & PTE_MASK))
++#define pgd_page(pgd) (pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT))
+ #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+ #define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
+ #define pgd_offset_k(address) (init_level4_pgt + pgd_index(address))
+@@ -402,16 +380,18 @@ static inline int pmd_large(pmd_t pte) {
+
+ /* PUD - Level3 access */
+ /* to find an entry in a page-table-directory. */
++#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PHYSICAL_PAGE_MASK))
++#define pud_page(pud) (pfn_to_page(pud_val(pud) >> PAGE_SHIFT))
+ #define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
+-#define pud_offset(pgd, address) ((pud_t *) pgd_page(*(pgd)) + pud_index(address))
++#define pud_offset(pgd, address) ((pud_t *) pgd_page_vaddr(*(pgd)) + pud_index(address))
+ #define pud_present(pud) (__pud_val(pud) & _PAGE_PRESENT)
+
+ /* PMD - Level 2 access */
+-#define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK))
++#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK))
+ #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+
+ #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
+-#define pmd_offset(dir, address) ((pmd_t *) pud_page(*(dir)) + \
++#define pmd_offset(dir, address) ((pmd_t *) pud_page_vaddr(*(dir)) + \
+ pmd_index(address))
+ #define pmd_none(x) (!__pmd_val(x))
+ #if CONFIG_XEN_COMPAT <= 0x030002
+@@ -442,6 +422,7 @@ static inline pte_t mk_pte_phys(unsigned
+ {
+ unsigned long pteval;
+ pteval = physpage | pgprot_val(pgprot);
++ pteval &= __supported_pte_mask;
+ return __pte(pteval);
+ }
+
+@@ -463,7 +444,7 @@ static inline pte_t pte_modify(pte_t pte
+
+ #define pte_index(address) \
+ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+-#define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_kernel(*(dir)) + \
++#define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_vaddr(*(dir)) + \
+ pte_index(address))
+
+ /* x86-64 always has all page tables mapped. */
+@@ -504,6 +485,40 @@ static inline pte_t pte_modify(pte_t pte
+ ptep_establish(vma, address, ptep, entry); \
+ } while (0)
+
++
++/*
++ * i386 says: We don't actually have these, but we want to advertise
++ * them so that we can encompass the flush here.
++ */
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
++
++#define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
++#define ptep_clear_flush_dirty(vma, address, ptep) \
++({ \
++ pte_t __pte = *(ptep); \
++ int __dirty = pte_dirty(__pte); \
++ __pte = pte_mkclean(__pte); \
++ if ((vma)->vm_mm->context.pinned) \
++ ptep_set_access_flags(vma, address, ptep, __pte, __dirty); \
++ else if (__dirty) \
++ set_pte(ptep, __pte); \
++ __dirty; \
++})
++
++#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
++#define ptep_clear_flush_young(vma, address, ptep) \
++({ \
++ pte_t __pte = *(ptep); \
++ int __young = pte_young(__pte); \
++ __pte = pte_mkold(__pte); \
++ if ((vma)->vm_mm->context.pinned) \
++ ptep_set_access_flags(vma, address, ptep, __pte, __young); \
++ else if (__young) \
++ set_pte(ptep, __pte); \
++ __young; \
++})
++
+ /* Encode and de-code a swap entry */
+ #define __swp_type(x) (((x).val >> 1) & 0x3f)
+ #define __swp_offset(x) ((x).val >> 8)
+@@ -545,10 +560,11 @@ int touch_pte_range(struct mm_struct *mm
+ unsigned long size);
+
+ int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
+- unsigned long addr, unsigned long end, pgprot_t newprot);
++ unsigned long addr, unsigned long end, pgprot_t newprot,
++ int dirty_accountable);
+
+-#define arch_change_pte_range(mm, pmd, addr, end, newprot) \
+- xen_change_pte_range(mm, pmd, addr, end, newprot)
++#define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) \
++ xen_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable)
+
+ #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
+ direct_remap_pfn_range(vma,vaddr,pfn,size,prot,DOMID_IO)
+@@ -570,8 +586,6 @@ int xen_change_pte_range(struct mm_struc
+ #define kc_offset_to_vaddr(o) \
+ (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))
+
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
+ #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+ #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
+ #define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -484,6 +484,8 @@ static inline void __mwait(unsigned long
+ : :"a" (eax), "c" (ecx));
+ }
+
++extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
++
+ #define stack_current() \
+ ({ \
+ struct thread_info *ti; \
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/smp_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/smp_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/smp_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -4,15 +4,12 @@
+ /*
+ * We need the APIC definitions automatically as part of 'smp.h'
+ */
+-#ifndef __ASSEMBLY__
+ #include <linux/threads.h>
+ #include <linux/cpumask.h>
+ #include <linux/bitops.h>
+ extern int disable_apic;
+-#endif
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+-#ifndef __ASSEMBLY__
+ #include <asm/fixmap.h>
+ #include <asm/mpspec.h>
+ #ifdef CONFIG_X86_IO_APIC
+@@ -21,10 +18,8 @@ extern int disable_apic;
+ #include <asm/apic.h>
+ #include <asm/thread_info.h>
+ #endif
+-#endif
+
+ #ifdef CONFIG_SMP
+-#ifndef ASSEMBLY
+
+ #include <asm/pda.h>
+
+@@ -41,14 +36,11 @@ extern cpumask_t cpu_initialized;
+
+ extern void smp_alloc_memory(void);
+ extern volatile unsigned long smp_invalidate_needed;
+-extern int pic_mode;
+ extern void lock_ipi_call_lock(void);
+ extern void unlock_ipi_call_lock(void);
+ extern int smp_num_siblings;
+ extern void smp_send_reschedule(int cpu);
+ void smp_stop_cpu(void);
+-extern int smp_call_function_single(int cpuid, void (*func) (void *info),
+- void *info, int retry, int wait);
+
+ extern cpumask_t cpu_sibling_map[NR_CPUS];
+ extern cpumask_t cpu_core_map[NR_CPUS];
+@@ -77,20 +69,16 @@ static inline int hard_smp_processor_id(
+ }
+ #endif
+
+-extern int safe_smp_processor_id(void);
+ extern int __cpu_disable(void);
+ extern void __cpu_die(unsigned int cpu);
+ extern void prefill_possible_map(void);
+ extern unsigned num_processors;
+ extern unsigned disabled_cpus;
+
+-#endif /* !ASSEMBLY */
+-
+ #define NO_PROC_ID 0xFF /* No processor magic marker */
+
+ #endif
+
+-#ifndef ASSEMBLY
+ /*
+ * Some lowlevel functions might want to know about
+ * the real APIC ID <-> CPU # mapping.
+@@ -114,11 +102,8 @@ static inline int cpu_present_to_apicid(
+ }
+ #endif
+
+-#endif /* !ASSEMBLY */
+-
+ #ifndef CONFIG_SMP
+ #define stack_smp_processor_id() 0
+-#define safe_smp_processor_id() 0
+ #define cpu_logical_map(x) (x)
+ #else
+ #include <asm/thread_info.h>
+@@ -130,7 +115,6 @@ static inline int cpu_present_to_apicid(
+ })
+ #endif
+
+-#ifndef __ASSEMBLY__
+ #ifdef CONFIG_X86_LOCAL_APIC
+ static __inline int logical_smp_processor_id(void)
+ {
+@@ -138,13 +122,18 @@ static __inline int logical_smp_processo
+ return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
+ }
+ #endif
+-#endif
+
+ #ifdef CONFIG_SMP
+ #define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
+ #else
+ #define cpu_physical_id(cpu) boot_cpu_id
+-#endif
+-
++static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
++ void *info, int retry, int wait)
++{
++ /* Disable interrupts here? */
++ func(info);
++ return 0;
++}
++#endif /* !CONFIG_SMP */
+ #endif
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/system_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -24,6 +24,7 @@
+ #define __EXTRA_CLOBBER \
+ ,"rcx","rbx","rdx","r8","r9","r10","r11","r12","r13","r14","r15"
+
++/* Save restore flags to clear handle leaking NT */
+ #define switch_to(prev,next,last) \
+ asm volatile(SAVE_CONTEXT \
+ "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */ \
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/tlbflush_64.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_64.h 2008-12-01 11:29:05.000000000 +0100
+@@ -12,9 +12,6 @@
+ */
+ #define __flush_tlb_global() xen_tlb_flush()
+
+-
+-extern unsigned long pgkern_mask;
+-
+ #define __flush_tlb_all() __flush_tlb_global()
+
+ #define __flush_tlb_one(addr) xen_invlpg((unsigned long)addr)
+Index: head-2008-12-01/include/linux/skbuff.h
+===================================================================
+--- head-2008-12-01.orig/include/linux/skbuff.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/linux/skbuff.h 2008-12-01 11:29:05.000000000 +0100
+@@ -1771,5 +1771,12 @@ static inline void skb_forward_csum(stru
+ }
+
+ bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off);
++
++#ifdef CONFIG_XEN
++int skb_checksum_setup(struct sk_buff *skb);
++#else
++static inline int skb_checksum_setup(struct sk_buff *skb) { return 0; }
++#endif
++
+ #endif /* __KERNEL__ */
+ #endif /* _LINUX_SKBUFF_H */
+Index: head-2008-12-01/include/xen/evtchn.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/evtchn.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/xen/evtchn.h 2008-12-01 11:29:05.000000000 +0100
+@@ -54,34 +54,34 @@
+ */
+ int bind_caller_port_to_irqhandler(
+ unsigned int caller_port,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
+ int bind_listening_port_to_irqhandler(
+ unsigned int remote_domain,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
+ int bind_interdomain_evtchn_to_irqhandler(
+ unsigned int remote_domain,
+ unsigned int remote_port,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
+ int bind_virq_to_irqhandler(
+ unsigned int virq,
+ unsigned int cpu,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
+ int bind_ipi_to_irqhandler(
+ unsigned int ipi,
+ unsigned int cpu,
+- irqreturn_t (*handler)(int, void *, struct pt_regs *),
++ irq_handler_t handler,
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
+Index: head-2008-12-01/include/xen/xencons.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/xencons.h 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/include/xen/xencons.h 2008-12-01 11:29:05.000000000 +0100
+@@ -8,7 +8,7 @@ void xencons_force_flush(void);
+ void xencons_resume(void);
+
+ /* Interrupt work hooks. Receive data, or kick data out. */
+-void xencons_rx(char *buf, unsigned len, struct pt_regs *regs);
++void xencons_rx(char *buf, unsigned len);
+ void xencons_tx(void);
+
+ int xencons_ring_init(void);
+Index: head-2008-12-01/mm/mprotect.c
+===================================================================
+--- head-2008-12-01.orig/mm/mprotect.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/mm/mprotect.c 2008-12-01 11:29:05.000000000 +0100
+@@ -92,7 +92,7 @@ static inline void change_pmd_range(stru
+ next = pmd_addr_end(addr, end);
+ if (pmd_none_or_clear_bad(pmd))
+ continue;
+- if (arch_change_pte_range(mm, pmd, addr, next, newprot))
++ if (arch_change_pte_range(mm, pmd, addr, next, newprot, dirty_accountable))
+ continue;
+ change_pte_range(mm, pmd, addr, next, newprot, dirty_accountable);
+ } while (pmd++, addr = next, addr != end);
+Index: head-2008-12-01/net/core/dev.c
+===================================================================
+--- head-2008-12-01.orig/net/core/dev.c 2008-12-03 15:49:14.000000000 +0100
++++ head-2008-12-01/net/core/dev.c 2008-12-01 11:29:05.000000000 +0100
+@@ -1765,15 +1765,14 @@ inline int skb_checksum_setup(struct sk_
+ }
+ if ((skb->h.raw + skb->csum + 2) > skb->tail)
+ goto out;
+- skb->ip_summed = CHECKSUM_HW;
++ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->proto_csum_blank = 0;
+ }
+ return 0;
+ out:
+ return -EPROTO;
+ }
+-#else
+-inline int skb_checksum_setup(struct sk_buff *skb) { return 0; }
++EXPORT_SYMBOL(skb_checksum_setup);
+ #endif
+
+ /**
+@@ -2324,7 +2323,7 @@ int netif_receive_skb(struct sk_buff *sk
+ case CHECKSUM_UNNECESSARY:
+ skb->proto_data_valid = 1;
+ break;
+- case CHECKSUM_HW:
++ case CHECKSUM_PARTIAL:
+ /* XXX Implement me. */
+ default:
+ skb->proto_data_valid = 0;
+@@ -4986,7 +4985,6 @@ EXPORT_SYMBOL(unregister_netdevice_notif
+ EXPORT_SYMBOL(net_enable_timestamp);
+ EXPORT_SYMBOL(net_disable_timestamp);
+ EXPORT_SYMBOL(dev_get_flags);
+-EXPORT_SYMBOL(skb_checksum_setup);
+
+ #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ EXPORT_SYMBOL(br_handle_frame_hook);
--- /dev/null
+From: www.kernel.org
+Subject: Linux 2.6.20
+Patch-mainline: 2.6.20
+
+Automatically created from "patches.kernel.org/patch-2.6.20" by xen-port-patches.py
+
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-12-01/arch/x86/Kconfig
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Kconfig 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/Kconfig 2008-12-01 11:32:38.000000000 +0100
+@@ -1427,7 +1427,7 @@ config PHYSICAL_START
+
+ config RELOCATABLE
+ bool "Build a relocatable kernel (EXPERIMENTAL)"
+- depends on EXPERIMENTAL
++ depends on EXPERIMENTAL && !X86_XEN
+ help
+ This builds a kernel image that retains relocation information
+ so it can be loaded someplace besides the default 1MB.
+Index: head-2008-12-01/arch/x86/kernel/asm-offsets_32.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/asm-offsets_32.c 2008-12-01 11:21:02.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/asm-offsets_32.c 2008-12-01 11:32:38.000000000 +0100
+@@ -54,6 +54,7 @@ void foo(void)
+ OFFSET(TI_exec_domain, thread_info, exec_domain);
+ OFFSET(TI_flags, thread_info, flags);
+ OFFSET(TI_status, thread_info, status);
++ OFFSET(TI_cpu, thread_info, cpu);
+ OFFSET(TI_preempt_count, thread_info, preempt_count);
+ OFFSET(TI_addr_limit, thread_info, addr_limit);
+ OFFSET(TI_restart_block, thread_info, restart_block);
+@@ -108,6 +109,11 @@ void foo(void)
+
+ OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
+
++#ifdef CONFIG_XEN
++ BLANK();
++ OFFSET(XEN_START_mfn_list, start_info, mfn_list);
++#endif
++
+ #ifdef CONFIG_PARAVIRT
+ BLANK();
+ OFFSET(PARAVIRT_enabled, pv_info, paravirt_enabled);
+Index: head-2008-12-01/arch/x86/kernel/cpu/common-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -22,6 +22,7 @@
+ #define phys_pkg_id(a,b) a
+ #endif
+ #endif
++#include <asm/pda.h>
+ #include <asm/hypervisor.h>
+
+ #include "cpu.h"
+@@ -29,10 +30,8 @@
+ DEFINE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
+ EXPORT_PER_CPU_SYMBOL(cpu_gdt_descr);
+
+-#ifndef CONFIG_XEN
+-DEFINE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
+-EXPORT_PER_CPU_SYMBOL(cpu_16bit_stack);
+-#endif
++struct i386_pda *_cpu_pda[NR_CPUS] __read_mostly;
++EXPORT_SYMBOL(_cpu_pda);
+
+ static int cachesize_override __cpuinitdata = -1;
+ static int disable_x86_fxsr __cpuinitdata;
+@@ -60,7 +59,7 @@ static struct cpu_dev __cpuinitdata defa
+ .c_init = default_init,
+ .c_vendor = "Unknown",
+ };
+-static struct cpu_dev * this_cpu = &default_cpu;
++static struct cpu_dev * this_cpu __cpuinitdata = &default_cpu;
+
+ static int __init cachesize_setup(char *str)
+ {
+@@ -242,29 +241,14 @@ static int __cpuinit have_cpuid_p(void)
+ return flag_is_changeable_p(X86_EFLAGS_ID);
+ }
+
+-/* Do minimum CPU detection early.
+- Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment.
+- The others are not touched to avoid unwanted side effects.
+-
+- WARNING: this function is only called on the BP. Don't add code here
+- that is supposed to run on all CPUs. */
+-static void __init early_cpu_detect(void)
++void __init cpu_detect(struct cpuinfo_x86 *c)
+ {
+- struct cpuinfo_x86 *c = &boot_cpu_data;
+-
+- c->x86_cache_alignment = 32;
+-
+- if (!have_cpuid_p())
+- return;
+-
+ /* Get vendor name */
+ cpuid(0x00000000, &c->cpuid_level,
+ (int *)&c->x86_vendor_id[0],
+ (int *)&c->x86_vendor_id[8],
+ (int *)&c->x86_vendor_id[4]);
+
+- get_cpu_vendor(c, 1);
+-
+ c->x86 = 4;
+ if (c->cpuid_level >= 0x00000001) {
+ u32 junk, tfms, cap0, misc;
+@@ -281,6 +265,26 @@ static void __init early_cpu_detect(void
+ }
+ }
+
++/* Do minimum CPU detection early.
++ Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment.
++ The others are not touched to avoid unwanted side effects.
++
++ WARNING: this function is only called on the BP. Don't add code here
++ that is supposed to run on all CPUs. */
++static void __init early_cpu_detect(void)
++{
++ struct cpuinfo_x86 *c = &boot_cpu_data;
++
++ c->x86_cache_alignment = 32;
++
++ if (!have_cpuid_p())
++ return;
++
++ cpu_detect(c);
++
++ get_cpu_vendor(c, 1);
++}
++
+ static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
+ {
+ u32 tfms, xlvl;
+@@ -315,6 +319,8 @@ static void __cpuinit generic_identify(s
+ #else
+ c->apicid = (ebx >> 24) & 0xFF;
+ #endif
++ if (c->x86_capability[0] & (1<<19))
++ c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
+ } else {
+ /* Have CPUID level 0 only - unheard of */
+ c->x86 = 4;
+@@ -379,6 +385,7 @@ void __cpuinit identify_cpu(struct cpuin
+ c->x86_vendor_id[0] = '\0'; /* Unset */
+ c->x86_model_id[0] = '\0'; /* Unset */
+ c->x86_max_cores = 1;
++ c->x86_clflush_size = 32;
+ memset(&c->x86_capability, 0, sizeof c->x86_capability);
+
+ if (!have_cpuid_p()) {
+@@ -599,61 +606,23 @@ void __init early_cpu_init(void)
+ #endif
+ }
+
+-static void __cpuinit cpu_gdt_init(const struct Xgt_desc_struct *gdt_descr)
++/* Make sure %gs is initialized properly in idle threads */
++struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
+ {
+- unsigned long frames[16];
+- unsigned long va;
+- int f;
+-
+- for (va = gdt_descr->address, f = 0;
+- va < gdt_descr->address + gdt_descr->size;
+- va += PAGE_SIZE, f++) {
+- frames[f] = virt_to_mfn(va);
+- make_lowmem_page_readonly(
+- (void *)va, XENFEAT_writable_descriptor_tables);
+- }
+- if (HYPERVISOR_set_gdt(frames, (gdt_descr->size + 1) / 8))
+- BUG();
++ memset(regs, 0, sizeof(struct pt_regs));
++ regs->xgs = __KERNEL_PDA;
++ return regs;
+ }
+
+-/*
+- * cpu_init() initializes state that is per-CPU. Some data is already
+- * initialized (naturally) in the bootstrap process, such as the GDT
+- * and IDT. We reload them nevertheless, this function acts as a
+- * 'CPU state barrier', nothing should get across.
+- */
+-void __cpuinit cpu_init(void)
++static __cpuinit int alloc_gdt(int cpu)
+ {
+- int cpu = smp_processor_id();
+-#ifndef CONFIG_X86_NO_TSS
+- struct tss_struct * t = &per_cpu(init_tss, cpu);
+-#endif
+- struct thread_struct *thread = ¤t->thread;
+- struct desc_struct *gdt;
+ struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++ struct desc_struct *gdt;
++ struct i386_pda *pda;
+
+- if (cpu_test_and_set(cpu, cpu_initialized)) {
+- printk(KERN_WARNING "CPU#%d already initialized!\n", cpu);
+- for (;;) local_irq_enable();
+- }
+- printk(KERN_INFO "Initializing CPU#%d\n", cpu);
+-
+- if (cpu_has_vme || cpu_has_de)
+- clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
+- if (tsc_disable && cpu_has_tsc) {
+- printk(KERN_NOTICE "Disabling TSC...\n");
+- /**** FIX-HPA: DOES THIS REALLY BELONG HERE? ****/
+- clear_bit(X86_FEATURE_TSC, boot_cpu_data.x86_capability);
+- set_in_cr4(X86_CR4_TSD);
+- }
++ gdt = (struct desc_struct *)cpu_gdt_descr->address;
++ pda = cpu_pda(cpu);
+
+-#ifndef CONFIG_XEN
+- /* The CPU hotplug case */
+- if (cpu_gdt_descr->address) {
+- gdt = (struct desc_struct *)cpu_gdt_descr->address;
+- memset(gdt, 0, PAGE_SIZE);
+- goto old_gdt;
+- }
+ /*
+ * This is a horrible hack to allocate the GDT. The problem
+ * is that cpu_init() is called really early for the boot CPU
+@@ -661,54 +630,141 @@ void __cpuinit cpu_init(void)
+ * CPUs, when bootmem will have gone away
+ */
+ if (NODE_DATA(0)->bdata->node_bootmem_map) {
+- gdt = (struct desc_struct *)alloc_bootmem_pages(PAGE_SIZE);
+- /* alloc_bootmem_pages panics on failure, so no check */
++ BUG_ON(gdt != NULL || pda != NULL);
++
++ gdt = alloc_bootmem_pages(PAGE_SIZE);
++ pda = alloc_bootmem(sizeof(*pda));
++ /* alloc_bootmem(_pages) panics on failure, so no check */
++
+ memset(gdt, 0, PAGE_SIZE);
++ memset(pda, 0, sizeof(*pda));
+ } else {
+- gdt = (struct desc_struct *)get_zeroed_page(GFP_KERNEL);
+- if (unlikely(!gdt)) {
+- printk(KERN_CRIT "CPU%d failed to allocate GDT\n", cpu);
+- for (;;)
+- local_irq_enable();
++ /* GDT and PDA might already have been allocated if
++ this is a CPU hotplug re-insertion. */
++ if (gdt == NULL)
++ gdt = (struct desc_struct *)get_zeroed_page(GFP_KERNEL);
++
++ if (pda == NULL)
++ pda = kmalloc_node(sizeof(*pda), GFP_KERNEL, cpu_to_node(cpu));
++
++ if (unlikely(!gdt || !pda)) {
++ free_pages((unsigned long)gdt, 0);
++ kfree(pda);
++ return 0;
+ }
+ }
+-old_gdt:
++
++ cpu_gdt_descr->address = (unsigned long)gdt;
++ cpu_pda(cpu) = pda;
++
++ return 1;
++}
++
++/* Initial PDA used by boot CPU */
++struct i386_pda boot_pda = {
++ ._pda = &boot_pda,
++ .cpu_number = 0,
++ .pcurrent = &init_task,
++};
++
++static inline void set_kernel_gs(void)
++{
++ /* Set %gs for this CPU's PDA. Memory clobber is to create a
++ barrier with respect to any PDA operations, so the compiler
++ doesn't move any before here. */
++ asm volatile ("mov %0, %%gs" : : "r" (__KERNEL_PDA) : "memory");
++}
++
++/* Initialize the CPU's GDT and PDA. The boot CPU does this for
++ itself, but secondaries find this done for them. */
++__cpuinit int init_gdt(int cpu, struct task_struct *idle)
++{
++ struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++ struct desc_struct *gdt;
++ struct i386_pda *pda;
++
++ /* For non-boot CPUs, the GDT and PDA should already have been
++ allocated. */
++ if (!alloc_gdt(cpu)) {
++ printk(KERN_CRIT "CPU%d failed to allocate GDT or PDA\n", cpu);
++ return 0;
++ }
++
++ gdt = (struct desc_struct *)cpu_gdt_descr->address;
++ pda = cpu_pda(cpu);
++
++ BUG_ON(gdt == NULL || pda == NULL);
++
+ /*
+ * Initialize the per-CPU GDT with the boot GDT,
+ * and set up the GDT descriptor:
+ */
+ memcpy(gdt, cpu_gdt_table, GDT_SIZE);
++ cpu_gdt_descr->size = GDT_SIZE - 1;
+
+- /* Set up GDT entry for 16bit stack */
+- *(__u64 *)(&gdt[GDT_ENTRY_ESPFIX_SS]) |=
+- ((((__u64)stk16_off) << 16) & 0x000000ffffff0000ULL) |
+- ((((__u64)stk16_off) << 32) & 0xff00000000000000ULL) |
+- (CPU_16BIT_STACK_SIZE - 1);
++ pack_descriptor((u32 *)&gdt[GDT_ENTRY_PDA].a,
++ (u32 *)&gdt[GDT_ENTRY_PDA].b,
++ (unsigned long)pda, sizeof(*pda) - 1,
++ 0x80 | DESCTYPE_S | 0x2, 0); /* present read-write data segment */
++
++ memset(pda, 0, sizeof(*pda));
++ pda->_pda = pda;
++ pda->cpu_number = cpu;
++ pda->pcurrent = idle;
+
+- cpu_gdt_descr->size = GDT_SIZE - 1;
+- cpu_gdt_descr->address = (unsigned long)gdt;
+-#else
+- if (cpu == 0 && cpu_gdt_descr->address == 0) {
+- gdt = (struct desc_struct *)alloc_bootmem_pages(PAGE_SIZE);
+- /* alloc_bootmem_pages panics on failure, so no check */
+- memset(gdt, 0, PAGE_SIZE);
++ return 1;
++}
+
+- memcpy(gdt, cpu_gdt_table, GDT_SIZE);
+-
+- cpu_gdt_descr->size = GDT_SIZE;
+- cpu_gdt_descr->address = (unsigned long)gdt;
++void __cpuinit cpu_set_gdt(int cpu)
++{
++ struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++ unsigned long va, frames[16];
++ int f;
++
++ for (va = cpu_gdt_descr->address, f = 0;
++ va < cpu_gdt_descr->address + cpu_gdt_descr->size;
++ va += PAGE_SIZE, f++) {
++ frames[f] = virt_to_mfn(va);
++ make_lowmem_page_readonly(
++ (void *)va, XENFEAT_writable_descriptor_tables);
+ }
++ BUG_ON(HYPERVISOR_set_gdt(frames, (cpu_gdt_descr->size + 1) / 8));
++
++ set_kernel_gs();
++}
++
++/* Common CPU init for both boot and secondary CPUs */
++static void __cpuinit _cpu_init(int cpu, struct task_struct *curr)
++{
++#ifndef CONFIG_X86_NO_TSS
++ struct tss_struct * t = &per_cpu(init_tss, cpu);
+ #endif
++ struct thread_struct *thread = &curr->thread;
++
++ if (cpu_test_and_set(cpu, cpu_initialized)) {
++ printk(KERN_WARNING "CPU#%d already initialized!\n", cpu);
++ for (;;) local_irq_enable();
++ }
+
+- cpu_gdt_init(cpu_gdt_descr);
++ printk(KERN_INFO "Initializing CPU#%d\n", cpu);
++
++ if (cpu_has_vme || cpu_has_de)
++ clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
++ if (tsc_disable && cpu_has_tsc) {
++ printk(KERN_NOTICE "Disabling TSC...\n");
++ /**** FIX-HPA: DOES THIS REALLY BELONG HERE? ****/
++ clear_bit(X86_FEATURE_TSC, boot_cpu_data.x86_capability);
++ set_in_cr4(X86_CR4_TSD);
++ }
+
+ /*
+ * Set up and load the per-CPU TSS and LDT
+ */
+ atomic_inc(&init_mm.mm_count);
+- current->active_mm = &init_mm;
+- BUG_ON(current->mm);
+- enter_lazy_tlb(&init_mm, current);
++ curr->active_mm = &init_mm;
++ if (curr->mm)
++ BUG();
++ enter_lazy_tlb(&init_mm, curr);
+
+ load_esp0(t, thread);
+
+@@ -719,8 +775,8 @@ old_gdt:
+ __set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);
+ #endif
+
+- /* Clear %fs and %gs. */
+- asm volatile ("movl %0, %%fs; movl %0, %%gs" : : "r" (0));
++ /* Clear %fs. */
++ asm volatile ("mov %0, %%fs" : : "r" (0));
+
+ /* Clear all 6 debug registers: */
+ set_debugreg(0, 0);
+@@ -738,6 +794,38 @@ old_gdt:
+ mxcsr_feature_mask_init();
+ }
+
++/* Entrypoint to initialize secondary CPU */
++void __cpuinit secondary_cpu_init(void)
++{
++ int cpu = smp_processor_id();
++ struct task_struct *curr = current;
++
++ _cpu_init(cpu, curr);
++}
++
++/*
++ * cpu_init() initializes state that is per-CPU. Some data is already
++ * initialized (naturally) in the bootstrap process, such as the GDT
++ * and IDT. We reload them nevertheless, this function acts as a
++ * 'CPU state barrier', nothing should get across.
++ */
++void __cpuinit cpu_init(void)
++{
++ int cpu = smp_processor_id();
++ struct task_struct *curr = current;
++
++ /* Set up the real GDT and PDA, so we can transition from the
++ boot versions. */
++ if (!init_gdt(cpu, curr)) {
++ /* failed to allocate something; not much we can do... */
++ for (;;)
++ local_irq_enable();
++ }
++
++ cpu_set_gdt(cpu);
++ _cpu_init(cpu, curr);
++}
++
+ #ifdef CONFIG_HOTPLUG_CPU
+ void __cpuinit cpu_uninit(void)
+ {
+Index: head-2008-12-01/arch/x86/kernel/cpu/mtrr/main-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/mtrr/main-xen.c 2008-01-28 12:24:18.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/mtrr/main-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -12,7 +12,7 @@
+ static DEFINE_MUTEX(mtrr_mutex);
+
+ void generic_get_mtrr(unsigned int reg, unsigned long *base,
+- unsigned int *size, mtrr_type * type)
++ unsigned long *size, mtrr_type * type)
+ {
+ struct xen_platform_op op;
+
+@@ -115,8 +115,7 @@ int mtrr_del_page(int reg, unsigned long
+ {
+ unsigned i;
+ mtrr_type ltype;
+- unsigned long lbase;
+- unsigned int lsize;
++ unsigned long lbase, lsize;
+ int error = -EINVAL;
+ struct xen_platform_op op;
+
+Index: head-2008-12-01/arch/x86/kernel/e820_32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/arch/x86/kernel/e820_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -0,0 +1,1015 @@
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/init.h>
++#include <linux/bootmem.h>
++#include <linux/ioport.h>
++#include <linux/string.h>
++#include <linux/kexec.h>
++#include <linux/module.h>
++#include <linux/mm.h>
++#include <linux/efi.h>
++#include <linux/pfn.h>
++#include <linux/uaccess.h>
++
++#include <asm/pgtable.h>
++#include <asm/page.h>
++#include <asm/e820.h>
++#include <xen/interface/memory.h>
++
++#ifdef CONFIG_EFI
++int efi_enabled = 0;
++EXPORT_SYMBOL(efi_enabled);
++#endif
++
++struct e820map e820;
++struct change_member {
++ struct e820entry *pbios; /* pointer to original bios entry */
++ unsigned long long addr; /* address for this change point */
++};
++static struct change_member change_point_list[2*E820MAX] __initdata;
++static struct change_member *change_point[2*E820MAX] __initdata;
++static struct e820entry *overlap_list[E820MAX] __initdata;
++static struct e820entry new_bios[E820MAX] __initdata;
++/* For PCI or other memory-mapped resources */
++unsigned long pci_mem_start = 0x10000000;
++#ifdef CONFIG_PCI
++EXPORT_SYMBOL(pci_mem_start);
++#endif
++extern int user_defined_memmap;
++struct resource data_resource = {
++ .name = "Kernel data",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++struct resource code_resource = {
++ .name = "Kernel code",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource system_rom_resource = {
++ .name = "System ROM",
++ .start = 0xf0000,
++ .end = 0xfffff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++};
++
++static struct resource extension_rom_resource = {
++ .name = "Extension ROM",
++ .start = 0xe0000,
++ .end = 0xeffff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++};
++
++static struct resource adapter_rom_resources[] = { {
++ .name = "Adapter ROM",
++ .start = 0xc8000,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++}, {
++ .name = "Adapter ROM",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++} };
++
++static struct resource video_rom_resource = {
++ .name = "Video ROM",
++ .start = 0xc0000,
++ .end = 0xc7fff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
++};
++
++static struct resource video_ram_resource = {
++ .name = "Video RAM area",
++ .start = 0xa0000,
++ .end = 0xbffff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource standard_io_resources[] = { {
++ .name = "dma1",
++ .start = 0x0000,
++ .end = 0x001f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "pic1",
++ .start = 0x0020,
++ .end = 0x0021,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "timer0",
++ .start = 0x0040,
++ .end = 0x0043,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "timer1",
++ .start = 0x0050,
++ .end = 0x0053,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "keyboard",
++ .start = 0x0060,
++ .end = 0x006f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "dma page reg",
++ .start = 0x0080,
++ .end = 0x008f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "pic2",
++ .start = 0x00a0,
++ .end = 0x00a1,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "dma2",
++ .start = 0x00c0,
++ .end = 0x00df,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "fpu",
++ .start = 0x00f0,
++ .end = 0x00ff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++} };
++
++static int romsignature(const unsigned char *x)
++{
++ unsigned short sig;
++ int ret = 0;
++ if (probe_kernel_address((const unsigned short *)x, sig) == 0)
++ ret = (sig == 0xaa55);
++ return ret;
++}
++
++static int __init romchecksum(unsigned char *rom, unsigned long length)
++{
++ unsigned char *p, sum = 0;
++
++ for (p = rom; p < rom + length; p++)
++ sum += *p;
++ return sum == 0;
++}
++
++static void __init probe_roms(void)
++{
++ unsigned long start, length, upper;
++ unsigned char *rom;
++ int i;
++
++#ifdef CONFIG_XEN
++ /* Nothing to do if not running in dom0. */
++ if (!is_initial_xendomain())
++ return;
++#endif
++
++ /* video rom */
++ upper = adapter_rom_resources[0].start;
++ for (start = video_rom_resource.start; start < upper; start += 2048) {
++ rom = isa_bus_to_virt(start);
++ if (!romsignature(rom))
++ continue;
++
++ video_rom_resource.start = start;
++
++ /* 0 < length <= 0x7f * 512, historically */
++ length = rom[2] * 512;
++
++ /* if checksum okay, trust length byte */
++ if (length && romchecksum(rom, length))
++ video_rom_resource.end = start + length - 1;
++
++ request_resource(&iomem_resource, &video_rom_resource);
++ break;
++ }
++
++ start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
++ if (start < upper)
++ start = upper;
++
++ /* system rom */
++ request_resource(&iomem_resource, &system_rom_resource);
++ upper = system_rom_resource.start;
++
++ /* check for extension rom (ignore length byte!) */
++ rom = isa_bus_to_virt((unsigned long)extension_rom_resource.start);
++ if (romsignature(rom)) {
++ length = extension_rom_resource.end - extension_rom_resource.start + 1;
++ if (romchecksum(rom, length)) {
++ request_resource(&iomem_resource, &extension_rom_resource);
++ upper = extension_rom_resource.start;
++ }
++ }
++
++ /* check for adapter roms on 2k boundaries */
++ for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
++ rom = isa_bus_to_virt(start);
++ if (!romsignature(rom))
++ continue;
++
++ /* 0 < length <= 0x7f * 512, historically */
++ length = rom[2] * 512;
++
++ /* but accept any length that fits if checksum okay */
++ if (!length || start + length > upper || !romchecksum(rom, length))
++ continue;
++
++ adapter_rom_resources[i].start = start;
++ adapter_rom_resources[i].end = start + length - 1;
++ request_resource(&iomem_resource, &adapter_rom_resources[i]);
++
++ start = adapter_rom_resources[i++].end & ~2047UL;
++ }
++}
++
++#ifdef CONFIG_XEN
++static struct e820map machine_e820 __initdata;
++#define e820 machine_e820
++#endif
++
++/*
++ * Request address space for all standard RAM and ROM resources
++ * and also for regions reported as reserved by the e820.
++ */
++static void __init
++legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
++{
++ int i;
++
++ probe_roms();
++ for (i = 0; i < e820.nr_map; i++) {
++ struct resource *res;
++#ifndef CONFIG_RESOURCES_64BIT
++ if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL)
++ continue;
++#endif
++ res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
++ switch (e820.map[i].type) {
++ case E820_RAM: res->name = "System RAM"; break;
++ case E820_ACPI: res->name = "ACPI Tables"; break;
++ case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
++ default: res->name = "reserved";
++ }
++ res->start = e820.map[i].addr;
++ res->end = res->start + e820.map[i].size - 1;
++ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
++ if (request_resource(&iomem_resource, res)) {
++ kfree(res);
++ continue;
++ }
++ if (e820.map[i].type == E820_RAM) {
++ /*
++ * We don't know which RAM region contains kernel data,
++ * so we try it repeatedly and let the resource manager
++ * test it.
++ */
++#ifndef CONFIG_XEN
++ request_resource(res, code_resource);
++ request_resource(res, data_resource);
++#endif
++#ifdef CONFIG_KEXEC
++ request_resource(res, &crashk_res);
++#ifdef CONFIG_XEN
++ xen_machine_kexec_register_resources(res);
++#endif
++#endif
++ }
++ }
++}
++
++#undef e820
++
++/*
++ * Request address space for all standard resources
++ *
++ * This is called just before pcibios_init(), which is also a
++ * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
++ */
++static int __init request_standard_resources(void)
++{
++ int i;
++
++ /* Nothing to do if not running in dom0. */
++ if (!is_initial_xendomain())
++ return 0;
++
++ printk("Setting up standard PCI resources\n");
++ if (efi_enabled)
++ efi_initialize_iomem_resources(&code_resource, &data_resource);
++ else
++ legacy_init_iomem_resources(&code_resource, &data_resource);
++
++ /* EFI systems may still have VGA */
++ request_resource(&iomem_resource, &video_ram_resource);
++
++ /* request I/O space for devices used on all i[345]86 PCs */
++ for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
++ request_resource(&ioport_resource, &standard_io_resources[i]);
++ return 0;
++}
++
++subsys_initcall(request_standard_resources);
++
++void __init add_memory_region(unsigned long long start,
++ unsigned long long size, int type)
++{
++ int x;
++
++ if (!efi_enabled) {
++ x = e820.nr_map;
++
++ if (x == E820MAX) {
++ printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
++ return;
++ }
++
++ e820.map[x].addr = start;
++ e820.map[x].size = size;
++ e820.map[x].type = type;
++ e820.nr_map++;
++ }
++} /* add_memory_region */
++
++/*
++ * Sanitize the BIOS e820 map.
++ *
++ * Some e820 responses include overlapping entries. The following
++ * replaces the original e820 map with a new one, removing overlaps.
++ *
++ */
++int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
++{
++ struct change_member *change_tmp;
++ unsigned long current_type, last_type;
++ unsigned long long last_addr;
++ int chgidx, still_changing;
++ int overlap_entries;
++ int new_bios_entry;
++ int old_nr, new_nr, chg_nr;
++ int i;
++
++ /*
++ Visually we're performing the following (1,2,3,4 = memory types)...
++
++ Sample memory map (w/overlaps):
++ ____22__________________
++ ______________________4_
++ ____1111________________
++ _44_____________________
++ 11111111________________
++ ____________________33__
++ ___________44___________
++ __________33333_________
++ ______________22________
++ ___________________2222_
++ _________111111111______
++ _____________________11_
++ _________________4______
++
++ Sanitized equivalent (no overlap):
++ 1_______________________
++ _44_____________________
++ ___1____________________
++ ____22__________________
++ ______11________________
++ _________1______________
++ __________3_____________
++ ___________44___________
++ _____________33_________
++ _______________2________
++ ________________1_______
++ _________________4______
++ ___________________2____
++ ____________________33__
++ ______________________4_
++ */
++ printk("sanitize start\n");
++ /* if there's only one memory region, don't bother */
++ if (*pnr_map < 2) {
++ printk("sanitize bail 0\n");
++ return -1;
++ }
++
++ old_nr = *pnr_map;
++
++ /* bail out if we find any unreasonable addresses in bios map */
++ for (i=0; i<old_nr; i++)
++ if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr) {
++ printk("sanitize bail 1\n");
++ return -1;
++ }
++
++ /* create pointers for initial change-point information (for sorting) */
++ for (i=0; i < 2*old_nr; i++)
++ change_point[i] = &change_point_list[i];
++
++ /* record all known change-points (starting and ending addresses),
++ omitting those that are for empty memory regions */
++ chgidx = 0;
++ for (i=0; i < old_nr; i++) {
++ if (biosmap[i].size != 0) {
++ change_point[chgidx]->addr = biosmap[i].addr;
++ change_point[chgidx++]->pbios = &biosmap[i];
++ change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
++ change_point[chgidx++]->pbios = &biosmap[i];
++ }
++ }
++ chg_nr = chgidx; /* true number of change-points */
++
++ /* sort change-point list by memory addresses (low -> high) */
++ still_changing = 1;
++ while (still_changing) {
++ still_changing = 0;
++ for (i=1; i < chg_nr; i++) {
++ /* if <current_addr> > <last_addr>, swap */
++ /* or, if current=<start_addr> & last=<end_addr>, swap */
++ if ((change_point[i]->addr < change_point[i-1]->addr) ||
++ ((change_point[i]->addr == change_point[i-1]->addr) &&
++ (change_point[i]->addr == change_point[i]->pbios->addr) &&
++ (change_point[i-1]->addr != change_point[i-1]->pbios->addr))
++ )
++ {
++ change_tmp = change_point[i];
++ change_point[i] = change_point[i-1];
++ change_point[i-1] = change_tmp;
++ still_changing=1;
++ }
++ }
++ }
++
++ /* create a new bios memory map, removing overlaps */
++ overlap_entries=0; /* number of entries in the overlap table */
++ new_bios_entry=0; /* index for creating new bios map entries */
++ last_type = 0; /* start with undefined memory type */
++ last_addr = 0; /* start with 0 as last starting address */
++ /* loop through change-points, determining affect on the new bios map */
++ for (chgidx=0; chgidx < chg_nr; chgidx++)
++ {
++ /* keep track of all overlapping bios entries */
++ if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
++ {
++ /* add map entry to overlap list (> 1 entry implies an overlap) */
++ overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
++ }
++ else
++ {
++ /* remove entry from list (order independent, so swap with last) */
++ for (i=0; i<overlap_entries; i++)
++ {
++ if (overlap_list[i] == change_point[chgidx]->pbios)
++ overlap_list[i] = overlap_list[overlap_entries-1];
++ }
++ overlap_entries--;
++ }
++ /* if there are overlapping entries, decide which "type" to use */
++ /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
++ current_type = 0;
++ for (i=0; i<overlap_entries; i++)
++ if (overlap_list[i]->type > current_type)
++ current_type = overlap_list[i]->type;
++ /* continue building up new bios map based on this information */
++ if (current_type != last_type) {
++ if (last_type != 0) {
++ new_bios[new_bios_entry].size =
++ change_point[chgidx]->addr - last_addr;
++ /* move forward only if the new size was non-zero */
++ if (new_bios[new_bios_entry].size != 0)
++ if (++new_bios_entry >= E820MAX)
++ break; /* no more space left for new bios entries */
++ }
++ if (current_type != 0) {
++ new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
++ new_bios[new_bios_entry].type = current_type;
++ last_addr=change_point[chgidx]->addr;
++ }
++ last_type = current_type;
++ }
++ }
++ new_nr = new_bios_entry; /* retain count for new bios entries */
++
++ /* copy new bios mapping into original location */
++ memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
++ *pnr_map = new_nr;
++
++ printk("sanitize end\n");
++ return 0;
++}
++
++/*
++ * Copy the BIOS e820 map into a safe place.
++ *
++ * Sanity-check it while we're at it..
++ *
++ * If we're lucky and live on a modern system, the setup code
++ * will have given us a memory map that we can use to properly
++ * set up memory. If we aren't, we'll fake a memory map.
++ *
++ * We check to see that the memory map contains at least 2 elements
++ * before we'll use it, because the detection code in setup.S may
++ * not be perfect and most every PC known to man has two memory
++ * regions: one from 0 to 640k, and one from 1mb up. (The IBM
++ * thinkpad 560x, for example, does not cooperate with the memory
++ * detection code.)
++ */
++int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
++{
++#ifndef CONFIG_XEN
++ /* Only one memory region (or negative)? Ignore it */
++ if (nr_map < 2)
++ return -1;
++#else
++ BUG_ON(nr_map < 1);
++#endif
++
++ do {
++ unsigned long long start = biosmap->addr;
++ unsigned long long size = biosmap->size;
++ unsigned long long end = start + size;
++ unsigned long type = biosmap->type;
++ printk("copy_e820_map() start: %016Lx size: %016Lx end: %016Lx type: %ld\n", start, size, end, type);
++
++ /* Overflow in 64 bits? Ignore the memory map. */
++ if (start > end)
++ return -1;
++
++#ifndef CONFIG_XEN
++ /*
++ * Some BIOSes claim RAM in the 640k - 1M region.
++ * Not right. Fix it up.
++ */
++ if (type == E820_RAM) {
++ printk("copy_e820_map() type is E820_RAM\n");
++ if (start < 0x100000ULL && end > 0xA0000ULL) {
++ printk("copy_e820_map() lies in range...\n");
++ if (start < 0xA0000ULL) {
++ printk("copy_e820_map() start < 0xA0000ULL\n");
++ add_memory_region(start, 0xA0000ULL-start, type);
++ }
++ if (end <= 0x100000ULL) {
++ printk("copy_e820_map() end <= 0x100000ULL\n");
++ continue;
++ }
++ start = 0x100000ULL;
++ size = end - start;
++ }
++ }
++#endif
++ add_memory_region(start, size, type);
++ } while (biosmap++,--nr_map);
++
++#ifdef CONFIG_XEN
++ if (is_initial_xendomain()) {
++ struct xen_memory_map memmap;
++
++ memmap.nr_entries = E820MAX;
++ set_xen_guest_handle(memmap.buffer, machine_e820.map);
++
++ if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
++ BUG();
++ machine_e820.nr_map = memmap.nr_entries;
++ } else
++ machine_e820 = e820;
++#endif
++
++ return 0;
++}
++
++/*
++ * Callback for efi_memory_walk.
++ */
++static int __init
++efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
++{
++ unsigned long *max_pfn = arg, pfn;
++
++ if (start < end) {
++ pfn = PFN_UP(end -1);
++ if (pfn > *max_pfn)
++ *max_pfn = pfn;
++ }
++ return 0;
++}
++
++static int __init
++efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
++{
++ memory_present(0, PFN_UP(start), PFN_DOWN(end));
++ return 0;
++}
++
++/*
++ * Find the highest page frame number we have available
++ */
++void __init find_max_pfn(void)
++{
++ int i;
++
++ max_pfn = 0;
++ if (efi_enabled) {
++ efi_memmap_walk(efi_find_max_pfn, &max_pfn);
++ efi_memmap_walk(efi_memory_present_wrapper, NULL);
++ return;
++ }
++
++ for (i = 0; i < e820.nr_map; i++) {
++ unsigned long start, end;
++ /* RAM? */
++ if (e820.map[i].type != E820_RAM)
++ continue;
++ start = PFN_UP(e820.map[i].addr);
++ end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
++ if (start >= end)
++ continue;
++ if (end > max_pfn)
++ max_pfn = end;
++ memory_present(0, start, end);
++ }
++}
++
++/*
++ * Free all available memory for boot time allocation. Used
++ * as a callback function by efi_memory_walk()
++ */
++
++static int __init
++free_available_memory(unsigned long start, unsigned long end, void *arg)
++{
++ /* check max_low_pfn */
++ if (start >= (max_low_pfn << PAGE_SHIFT))
++ return 0;
++ if (end >= (max_low_pfn << PAGE_SHIFT))
++ end = max_low_pfn << PAGE_SHIFT;
++ if (start < end)
++ free_bootmem(start, end - start);
++
++ return 0;
++}
++/*
++ * Register fully available low RAM pages with the bootmem allocator.
++ */
++void __init register_bootmem_low_pages(unsigned long max_low_pfn)
++{
++ int i;
++
++ if (efi_enabled) {
++ efi_memmap_walk(free_available_memory, NULL);
++ return;
++ }
++ for (i = 0; i < e820.nr_map; i++) {
++ unsigned long curr_pfn, last_pfn, size;
++ /*
++ * Reserve usable low memory
++ */
++ if (e820.map[i].type != E820_RAM)
++ continue;
++ /*
++ * We are rounding up the start address of usable memory:
++ */
++ curr_pfn = PFN_UP(e820.map[i].addr);
++ if (curr_pfn >= max_low_pfn)
++ continue;
++ /*
++ * ... and at the end of the usable range downwards:
++ */
++ last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
++
++#ifdef CONFIG_XEN
++ /*
++ * Truncate to the number of actual pages currently
++ * present.
++ */
++ if (last_pfn > xen_start_info->nr_pages)
++ last_pfn = xen_start_info->nr_pages;
++#endif
++
++ if (last_pfn > max_low_pfn)
++ last_pfn = max_low_pfn;
++
++ /*
++ * .. finally, did all the rounding and playing
++ * around just make the area go away?
++ */
++ if (last_pfn <= curr_pfn)
++ continue;
++
++ size = last_pfn - curr_pfn;
++ free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
++ }
++}
++
++void __init e820_register_memory(void)
++{
++ unsigned long gapstart, gapsize, round;
++ unsigned long long last;
++ int i;
++
++#ifdef CONFIG_XEN
++ if (is_initial_xendomain()) {
++ struct xen_memory_map memmap;
++
++ memmap.nr_entries = E820MAX;
++ set_xen_guest_handle(memmap.buffer, machine_e820.map);
++
++ if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
++ BUG();
++ machine_e820.nr_map = memmap.nr_entries;
++ }
++ else
++ machine_e820 = e820;
++#define e820 machine_e820
++#endif
++
++ /*
++ * Search for the bigest gap in the low 32 bits of the e820
++ * memory space.
++ */
++ last = 0x100000000ull;
++ gapstart = 0x10000000;
++ gapsize = 0x400000;
++ i = e820.nr_map;
++ while (--i >= 0) {
++ unsigned long long start = e820.map[i].addr;
++ unsigned long long end = start + e820.map[i].size;
++
++ /*
++ * Since "last" is at most 4GB, we know we'll
++ * fit in 32 bits if this condition is true
++ */
++ if (last > end) {
++ unsigned long gap = last - end;
++
++ if (gap > gapsize) {
++ gapsize = gap;
++ gapstart = end;
++ }
++ }
++ if (start < last)
++ last = start;
++ }
++#undef e820
++
++ /*
++ * See how much we want to round up: start off with
++ * rounding to the next 1MB area.
++ */
++ round = 0x100000;
++ while ((gapsize >> 4) > round)
++ round += round;
++ /* Fun with two's complement */
++ pci_mem_start = (gapstart + round) & -round;
++
++ printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
++ pci_mem_start, gapstart, gapsize);
++}
++
++void __init print_memory_map(char *who)
++{
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ printk(" %s: %016Lx - %016Lx ", who,
++ e820.map[i].addr,
++ e820.map[i].addr + e820.map[i].size);
++ switch (e820.map[i].type) {
++ case E820_RAM: printk("(usable)\n");
++ break;
++ case E820_RESERVED:
++ printk("(reserved)\n");
++ break;
++ case E820_ACPI:
++ printk("(ACPI data)\n");
++ break;
++ case E820_NVS:
++ printk("(ACPI NVS)\n");
++ break;
++ default: printk("type %lu\n", e820.map[i].type);
++ break;
++ }
++ }
++}
++
++static __init __always_inline void efi_limit_regions(unsigned long long size)
++{
++ unsigned long long current_addr = 0;
++ efi_memory_desc_t *md, *next_md;
++ void *p, *p1;
++ int i, j;
++
++ j = 0;
++ p1 = memmap.map;
++ for (p = p1, i = 0; p < memmap.map_end; p += memmap.desc_size, i++) {
++ md = p;
++ next_md = p1;
++ current_addr = md->phys_addr +
++ PFN_PHYS(md->num_pages);
++ if (is_available_memory(md)) {
++ if (md->phys_addr >= size) continue;
++ memcpy(next_md, md, memmap.desc_size);
++ if (current_addr >= size) {
++ next_md->num_pages -=
++ PFN_UP(current_addr-size);
++ }
++ p1 += memmap.desc_size;
++ next_md = p1;
++ j++;
++ } else if ((md->attribute & EFI_MEMORY_RUNTIME) ==
++ EFI_MEMORY_RUNTIME) {
++ /* In order to make runtime services
++ * available we have to include runtime
++ * memory regions in memory map */
++ memcpy(next_md, md, memmap.desc_size);
++ p1 += memmap.desc_size;
++ next_md = p1;
++ j++;
++ }
++ }
++ memmap.nr_map = j;
++ memmap.map_end = memmap.map +
++ (memmap.nr_map * memmap.desc_size);
++}
++
++void __init limit_regions(unsigned long long size)
++{
++ unsigned long long current_addr = 0;
++ int i;
++
++ print_memory_map("limit_regions start");
++ if (efi_enabled) {
++ efi_limit_regions(size);
++ return;
++ }
++ for (i = 0; i < e820.nr_map; i++) {
++ current_addr = e820.map[i].addr + e820.map[i].size;
++ if (current_addr < size)
++ continue;
++
++ if (e820.map[i].type != E820_RAM)
++ continue;
++
++ if (e820.map[i].addr >= size) {
++ /*
++ * This region starts past the end of the
++ * requested size, skip it completely.
++ */
++ e820.nr_map = i;
++ } else {
++ e820.nr_map = i + 1;
++ e820.map[i].size -= current_addr - size;
++ }
++ print_memory_map("limit_regions endfor");
++ return;
++ }
++#ifdef CONFIG_XEN
++ if (current_addr < size) {
++ /*
++ * The e820 map finished before our requested size so
++ * extend the final entry to the requested address.
++ */
++ --i;
++ if (e820.map[i].type == E820_RAM)
++ e820.map[i].size -= current_addr - size;
++ else
++ add_memory_region(current_addr, size - current_addr, E820_RAM);
++ }
++#endif
++ print_memory_map("limit_regions endfunc");
++}
++
++/*
++ * This function checks if any part of the range <start,end> is mapped
++ * with type.
++ */
++int
++e820_any_mapped(u64 start, u64 end, unsigned type)
++{
++ int i;
++
++#ifndef CONFIG_XEN
++ for (i = 0; i < e820.nr_map; i++) {
++ const struct e820entry *ei = &e820.map[i];
++#else
++ if (!is_initial_xendomain())
++ return 0;
++ for (i = 0; i < machine_e820.nr_map; ++i) {
++ const struct e820entry *ei = &machine_e820.map[i];
++#endif
++
++ if (type && ei->type != type)
++ continue;
++ if (ei->addr >= end || ei->addr + ei->size <= start)
++ continue;
++ return 1;
++ }
++ return 0;
++}
++EXPORT_SYMBOL_GPL(e820_any_mapped);
++
++ /*
++ * This function checks if the entire range <start,end> is mapped with type.
++ *
++ * Note: this function only works correct if the e820 table is sorted and
++ * not-overlapping, which is the case
++ */
++int __init
++e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
++{
++ u64 start = s;
++ u64 end = e;
++ int i;
++
++#ifndef CONFIG_XEN
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++#else
++ if (!is_initial_xendomain())
++ return 0;
++ for (i = 0; i < machine_e820.nr_map; ++i) {
++ const struct e820entry *ei = &machine_e820.map[i];
++#endif
++
++ if (type && ei->type != type)
++ continue;
++ /* is the region (part) in overlap with the current region ?*/
++ if (ei->addr >= end || ei->addr + ei->size <= start)
++ continue;
++ /* if the region is at the beginning of <start,end> we move
++ * start to the end of the region since it's ok until there
++ */
++ if (ei->addr <= start)
++ start = ei->addr + ei->size;
++ /* if start is now at or beyond end, we're done, full
++ * coverage */
++ if (start >= end)
++ return 1; /* we're done */
++ }
++ return 0;
++}
++
++static int __init parse_memmap(char *arg)
++{
++ if (!arg)
++ return -EINVAL;
++
++ if (strcmp(arg, "exactmap") == 0) {
++#ifdef CONFIG_CRASH_DUMP
++ /* If we are doing a crash dump, we
++ * still need to know the real mem
++ * size before original memory map is
++ * reset.
++ */
++ find_max_pfn();
++ saved_max_pfn = max_pfn;
++#endif
++ e820.nr_map = 0;
++ user_defined_memmap = 1;
++ } else {
++ /* If the user specifies memory size, we
++ * limit the BIOS-provided memory map to
++ * that size. exactmap can be used to specify
++ * the exact map. mem=number can be used to
++ * trim the existing memory map.
++ */
++ unsigned long long start_at, mem_size;
++
++ mem_size = memparse(arg, &arg);
++ if (*arg == '@') {
++ start_at = memparse(arg+1, &arg);
++ add_memory_region(start_at, mem_size, E820_RAM);
++ } else if (*arg == '#') {
++ start_at = memparse(arg+1, &arg);
++ add_memory_region(start_at, mem_size, E820_ACPI);
++ } else if (*arg == '$') {
++ start_at = memparse(arg+1, &arg);
++ add_memory_region(start_at, mem_size, E820_RESERVED);
++ } else {
++ limit_regions(mem_size);
++ user_defined_memmap = 1;
++ }
++ }
++ return 0;
++}
++early_param("memmap", parse_memmap);
+Index: head-2008-12-01/arch/x86/kernel/entry_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:32:38.000000000 +0100
+@@ -30,12 +30,13 @@
+ * 18(%esp) - %eax
+ * 1C(%esp) - %ds
+ * 20(%esp) - %es
+- * 24(%esp) - orig_eax
+- * 28(%esp) - %eip
+- * 2C(%esp) - %cs
+- * 30(%esp) - %eflags
+- * 34(%esp) - %oldesp
+- * 38(%esp) - %oldss
++ * 24(%esp) - %gs
++ * 28(%esp) - orig_eax
++ * 2C(%esp) - %eip
++ * 30(%esp) - %cs
++ * 34(%esp) - %eflags
++ * 38(%esp) - %oldesp
++ * 3C(%esp) - %oldss
+ *
+ * "current" is in register %ebx during any slow entries.
+ */
+@@ -48,27 +49,25 @@
+ #include <asm/smp.h>
+ #include <asm/page.h>
+ #include <asm/desc.h>
++#include <asm/percpu.h>
+ #include <asm/dwarf2.h>
+ #include "irq_vectors.h"
+ #include <xen/interface/xen.h>
+
+-#define nr_syscalls ((syscall_table_size)/4)
++/*
++ * We use macros for low-level operations which need to be overridden
++ * for paravirtualization. The following will never clobber any registers:
++ * INTERRUPT_RETURN (aka. "iret")
++ * GET_CR0_INTO_EAX (aka. "movl %cr0, %eax")
++ * ENABLE_INTERRUPTS_SYSEXIT (aka "sti; sysexit").
++ *
++ * For DISABLE_INTERRUPTS/ENABLE_INTERRUPTS (aka "cli"/"sti"), you must
++ * specify what registers can be overwritten (CLBR_NONE, CLBR_EAX/EDX/ECX/ANY).
++ * Allowing a register to be clobbered can shrink the paravirt replacement
++ * enough to patch inline, increasing performance.
++ */
+
+-EBX = 0x00
+-ECX = 0x04
+-EDX = 0x08
+-ESI = 0x0C
+-EDI = 0x10
+-EBP = 0x14
+-EAX = 0x18
+-DS = 0x1C
+-ES = 0x20
+-ORIG_EAX = 0x24
+-EIP = 0x28
+-CS = 0x2C
+-EFLAGS = 0x30
+-OLDESP = 0x34
+-OLDSS = 0x38
++#define nr_syscalls ((syscall_table_size)/4)
+
+ CF_MASK = 0x00000001
+ TF_MASK = 0x00000100
+@@ -79,61 +78,16 @@ VM_MASK = 0x00020000
+ /* Pseudo-eflags. */
+ NMI_MASK = 0x80000000
+
+-#ifndef CONFIG_XEN
+-/* These are replaces for paravirtualization */
+-#define DISABLE_INTERRUPTS cli
+-#define ENABLE_INTERRUPTS sti
+-#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
+-#define INTERRUPT_RETURN iret
+-#define GET_CR0_INTO_EAX movl %cr0, %eax
+-#else
+-/* Offsets into shared_info_t. */
+-#define evtchn_upcall_pending /* 0 */
+-#define evtchn_upcall_mask 1
+-
+-#define sizeof_vcpu_shift 6
+-
+-#ifdef CONFIG_SMP
+-#define GET_VCPU_INFO movl TI_cpu(%ebp),%esi ; \
+- shl $sizeof_vcpu_shift,%esi ; \
+- addl HYPERVISOR_shared_info,%esi
+-#else
+-#define GET_VCPU_INFO movl HYPERVISOR_shared_info,%esi
+-#endif
+-
+-#define __DISABLE_INTERRUPTS movb $1,evtchn_upcall_mask(%esi)
+-#define __ENABLE_INTERRUPTS movb $0,evtchn_upcall_mask(%esi)
+-#define __TEST_PENDING testb $0xFF,evtchn_upcall_pending(%esi)
+-#define DISABLE_INTERRUPTS GET_VCPU_INFO ; \
+- __DISABLE_INTERRUPTS
+-#define ENABLE_INTERRUPTS GET_VCPU_INFO ; \
+- __ENABLE_INTERRUPTS
+-#define ENABLE_INTERRUPTS_SYSEXIT __ENABLE_INTERRUPTS ; \
+-sysexit_scrit: /**** START OF SYSEXIT CRITICAL REGION ****/ ; \
+- __TEST_PENDING ; \
+- jnz 14f # process more events if necessary... ; \
+- movl ESI(%esp), %esi ; \
+- sysexit ; \
+-14: __DISABLE_INTERRUPTS ; \
+- TRACE_IRQS_OFF ; \
+-sysexit_ecrit: /**** END OF SYSEXIT CRITICAL REGION ****/ ; \
+- push %esp ; \
+- call evtchn_do_upcall ; \
+- add $4,%esp ; \
+- jmp ret_from_intr
+-#define INTERRUPT_RETURN iret
+-#endif
+-
+ #ifdef CONFIG_PREEMPT
+-#define preempt_stop DISABLE_INTERRUPTS; TRACE_IRQS_OFF
++#define preempt_stop(clobbers) DISABLE_INTERRUPTS(clobbers); TRACE_IRQS_OFF
+ #else
+-#define preempt_stop
++#define preempt_stop(clobbers)
+ #define resume_kernel restore_nocheck
+ #endif
+
+ .macro TRACE_IRQS_IRET
+ #ifdef CONFIG_TRACE_IRQFLAGS
+- testl $IF_MASK,EFLAGS(%esp) # interrupts off?
++ testl $IF_MASK,PT_EFLAGS(%esp) # interrupts off?
+ jz 1f
+ TRACE_IRQS_ON
+ 1:
+@@ -148,6 +102,9 @@ sysexit_ecrit: /**** END OF SYSEXIT CRIT
+
+ #define SAVE_ALL \
+ cld; \
++ pushl %gs; \
++ CFI_ADJUST_CFA_OFFSET 4;\
++ /*CFI_REL_OFFSET gs, 0;*/\
+ pushl %es; \
+ CFI_ADJUST_CFA_OFFSET 4;\
+ /*CFI_REL_OFFSET es, 0;*/\
+@@ -177,7 +134,9 @@ sysexit_ecrit: /**** END OF SYSEXIT CRIT
+ CFI_REL_OFFSET ebx, 0;\
+ movl $(__USER_DS), %edx; \
+ movl %edx, %ds; \
+- movl %edx, %es;
++ movl %edx, %es; \
++ movl $(__KERNEL_PDA), %edx; \
++ movl %edx, %gs
+
+ #define RESTORE_INT_REGS \
+ popl %ebx; \
+@@ -210,17 +169,22 @@ sysexit_ecrit: /**** END OF SYSEXIT CRIT
+ 2: popl %es; \
+ CFI_ADJUST_CFA_OFFSET -4;\
+ /*CFI_RESTORE es;*/\
+-.section .fixup,"ax"; \
+-3: movl $0,(%esp); \
+- jmp 1b; \
++3: popl %gs; \
++ CFI_ADJUST_CFA_OFFSET -4;\
++ /*CFI_RESTORE gs;*/\
++.pushsection .fixup,"ax"; \
+ 4: movl $0,(%esp); \
++ jmp 1b; \
++5: movl $0,(%esp); \
+ jmp 2b; \
+-.previous; \
++6: movl $0,(%esp); \
++ jmp 3b; \
+ .section __ex_table,"a";\
+ .align 4; \
+- .long 1b,3b; \
+- .long 2b,4b; \
+-.previous
++ .long 1b,4b; \
++ .long 2b,5b; \
++ .long 3b,6b; \
++.popsection
+
+ #define RING0_INT_FRAME \
+ CFI_STARTPROC simple;\
+@@ -239,18 +203,18 @@ sysexit_ecrit: /**** END OF SYSEXIT CRIT
+ #define RING0_PTREGS_FRAME \
+ CFI_STARTPROC simple;\
+ CFI_SIGNAL_FRAME;\
+- CFI_DEF_CFA esp, OLDESP-EBX;\
+- /*CFI_OFFSET cs, CS-OLDESP;*/\
+- CFI_OFFSET eip, EIP-OLDESP;\
+- /*CFI_OFFSET es, ES-OLDESP;*/\
+- /*CFI_OFFSET ds, DS-OLDESP;*/\
+- CFI_OFFSET eax, EAX-OLDESP;\
+- CFI_OFFSET ebp, EBP-OLDESP;\
+- CFI_OFFSET edi, EDI-OLDESP;\
+- CFI_OFFSET esi, ESI-OLDESP;\
+- CFI_OFFSET edx, EDX-OLDESP;\
+- CFI_OFFSET ecx, ECX-OLDESP;\
+- CFI_OFFSET ebx, EBX-OLDESP
++ CFI_DEF_CFA esp, PT_OLDESP-PT_EBX;\
++ /*CFI_OFFSET cs, PT_CS-PT_OLDESP;*/\
++ CFI_OFFSET eip, PT_EIP-PT_OLDESP;\
++ /*CFI_OFFSET es, PT_ES-PT_OLDESP;*/\
++ /*CFI_OFFSET ds, PT_DS-PT_OLDESP;*/\
++ CFI_OFFSET eax, PT_EAX-PT_OLDESP;\
++ CFI_OFFSET ebp, PT_EBP-PT_OLDESP;\
++ CFI_OFFSET edi, PT_EDI-PT_OLDESP;\
++ CFI_OFFSET esi, PT_ESI-PT_OLDESP;\
++ CFI_OFFSET edx, PT_EDX-PT_OLDESP;\
++ CFI_OFFSET ecx, PT_ECX-PT_OLDESP;\
++ CFI_OFFSET ebx, PT_EBX-PT_OLDESP
+
+ ENTRY(ret_from_fork)
+ CFI_STARTPROC
+@@ -278,17 +242,18 @@ ENTRY(ret_from_fork)
+ ALIGN
+ RING0_PTREGS_FRAME
+ ret_from_exception:
+- preempt_stop
++ preempt_stop(CLBR_ANY)
+ ret_from_intr:
+ GET_THREAD_INFO(%ebp)
+ check_userspace:
+- movl EFLAGS(%esp), %eax # mix EFLAGS and CS
+- movb CS(%esp), %al
++ movl PT_EFLAGS(%esp), %eax # mix EFLAGS and CS
++ movb PT_CS(%esp), %al
+ andl $(VM_MASK | SEGMENT_RPL_MASK), %eax
+ cmpl $USER_RPL, %eax
+ jb resume_kernel # not returning to v8086 or userspace
++
+ ENTRY(resume_userspace)
+- DISABLE_INTERRUPTS # make sure we don't miss an interrupt
++ DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
+ # setting need_resched or sigpending
+ # between sampling and the iret
+ movl TI_flags(%ebp), %ecx
+@@ -299,14 +264,14 @@ ENTRY(resume_userspace)
+
+ #ifdef CONFIG_PREEMPT
+ ENTRY(resume_kernel)
+- DISABLE_INTERRUPTS
++ DISABLE_INTERRUPTS(CLBR_ANY)
+ cmpl $0,TI_preempt_count(%ebp) # non-zero preempt_count ?
+ jnz restore_nocheck
+ need_resched:
+ movl TI_flags(%ebp), %ecx # need_resched set ?
+ testb $_TIF_NEED_RESCHED, %cl
+ jz restore_all
+- testl $IF_MASK,EFLAGS(%esp) # interrupts off (exception path) ?
++ testl $IF_MASK,PT_EFLAGS(%esp) # interrupts off (exception path) ?
+ jz restore_all
+ call preempt_schedule_irq
+ jmp need_resched
+@@ -328,7 +293,7 @@ sysenter_past_esp:
+ * No need to follow this irqs on/off section: the syscall
+ * disabled irqs and here we enable it straight after entry:
+ */
+- ENABLE_INTERRUPTS
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ pushl $(__USER_DS)
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET ss, 0*/
+@@ -340,12 +305,16 @@ sysenter_past_esp:
+ pushl $(__USER_CS)
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET cs, 0*/
++#ifndef CONFIG_COMPAT_VDSO
+ /*
+ * Push current_thread_info()->sysenter_return to the stack.
+ * A tiny bit of offset fixup is necessary - 4*4 means the 4 words
+ * pushed above; +8 corresponds to copy_thread's esp0 setting.
+ */
+ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp)
++#else
++ pushl $SYSENTER_RETURN
++#endif
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET eip, 0
+
+@@ -372,19 +341,27 @@ sysenter_past_esp:
+ cmpl $(nr_syscalls), %eax
+ jae syscall_badsys
+ call *sys_call_table(,%eax,4)
+- movl %eax,EAX(%esp)
+- DISABLE_INTERRUPTS
++ movl %eax,PT_EAX(%esp)
++ DISABLE_INTERRUPTS(CLBR_ECX|CLBR_EDX)
+ TRACE_IRQS_OFF
+ movl TI_flags(%ebp), %ecx
+ testw $_TIF_ALLWORK_MASK, %cx
+ jne syscall_exit_work
+ /* if something modifies registers it must also disable sysexit */
+- movl EIP(%esp), %edx
+- movl OLDESP(%esp), %ecx
++ movl PT_EIP(%esp), %edx
++ movl PT_OLDESP(%esp), %ecx
+ xorl %ebp,%ebp
+ TRACE_IRQS_ON
++1: mov PT_GS(%esp), %gs
+ ENABLE_INTERRUPTS_SYSEXIT
+ CFI_ENDPROC
++.pushsection .fixup,"ax"
++2: movl $0,PT_GS(%esp)
++ jmp 1b
++.section __ex_table,"a"
++ .align 4
++ .long 1b,2b
++.popsection
+
+ # pv sysenter call handler stub
+ ENTRY(sysenter_entry_pv)
+@@ -419,7 +396,7 @@ ENTRY(system_call)
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+- testl $TF_MASK,EFLAGS(%esp)
++ testl $TF_MASK,PT_EFLAGS(%esp)
+ jz no_singlestep
+ orl $_TIF_SINGLESTEP,TI_flags(%ebp)
+ no_singlestep:
+@@ -431,9 +408,9 @@ no_singlestep:
+ jae syscall_badsys
+ syscall_call:
+ call *sys_call_table(,%eax,4)
+- movl %eax,EAX(%esp) # store the return value
++ movl %eax,PT_EAX(%esp) # store the return value
+ syscall_exit:
+- DISABLE_INTERRUPTS # make sure we don't miss an interrupt
++ DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
+ # setting need_resched or sigpending
+ # between sampling and the iret
+ TRACE_IRQS_OFF
+@@ -443,12 +420,12 @@ syscall_exit:
+
+ restore_all:
+ #ifndef CONFIG_XEN
+- movl EFLAGS(%esp), %eax # mix EFLAGS, SS and CS
+- # Warning: OLDSS(%esp) contains the wrong/random values if we
++ movl PT_EFLAGS(%esp), %eax # mix EFLAGS, SS and CS
++ # Warning: PT_OLDSS(%esp) contains the wrong/random values if we
+ # are returning to the kernel.
+ # See comments in process.c:copy_thread() for details.
+- movb OLDSS(%esp), %ah
+- movb CS(%esp), %al
++ movb PT_OLDSS(%esp), %ah
++ movb PT_CS(%esp), %al
+ andl $(VM_MASK | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax
+ cmpl $((SEGMENT_LDT << 8) | USER_RPL), %eax
+ CFI_REMEMBER_STATE
+@@ -456,7 +433,7 @@ restore_all:
+ restore_nocheck:
+ #else
+ restore_nocheck:
+- movl EFLAGS(%esp), %eax
++ movl PT_EFLAGS(%esp), %eax
+ testl $(VM_MASK|NMI_MASK), %eax
+ CFI_REMEMBER_STATE
+ jnz hypervisor_iret
+@@ -470,13 +447,13 @@ restore_nocheck:
+ TRACE_IRQS_IRET
+ restore_nocheck_notrace:
+ RESTORE_REGS
+- addl $4, %esp
++ addl $4, %esp # skip orig_eax/error_code
+ CFI_ADJUST_CFA_OFFSET -4
+ 1: INTERRUPT_RETURN
+ .section .fixup,"ax"
+ iret_exc:
+ #ifndef CONFIG_XEN
+- ENABLE_INTERRUPTS
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ #endif
+ pushl $0 # no error code
+ pushl $do_iret_error
+@@ -490,33 +467,42 @@ iret_exc:
+ CFI_RESTORE_STATE
+ #ifndef CONFIG_XEN
+ ldt_ss:
+- larl OLDSS(%esp), %eax
++ larl PT_OLDSS(%esp), %eax
+ jnz restore_nocheck
+ testl $0x00400000, %eax # returning to 32bit stack?
+ jnz restore_nocheck # allright, normal return
++
++#ifdef CONFIG_PARAVIRT
++ /*
++ * The kernel can't run on a non-flat stack if paravirt mode
++ * is active. Rather than try to fixup the high bits of
++ * ESP, bypass this code entirely. This may break DOSemu
++ * and/or Wine support in a paravirt VM, although the option
++ * is still available to implement the setting of the high
++ * 16-bits in the INTERRUPT_RETURN paravirt-op.
++ */
++ cmpl $0, paravirt_ops+PARAVIRT_enabled
++ jne restore_nocheck
++#endif
++
+ /* If returning to userspace with 16bit stack,
+ * try to fix the higher word of ESP, as the CPU
+ * won't restore it.
+ * This is an "official" bug of all the x86-compatible
+ * CPUs, which we can try to work around to make
+ * dosemu and wine happy. */
+- subl $8, %esp # reserve space for switch16 pointer
+- CFI_ADJUST_CFA_OFFSET 8
+- DISABLE_INTERRUPTS
++ movl PT_OLDESP(%esp), %eax
++ movl %esp, %edx
++ call patch_espfix_desc
++ pushl $__ESPFIX_SS
++ CFI_ADJUST_CFA_OFFSET 4
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ DISABLE_INTERRUPTS(CLBR_EAX)
+ TRACE_IRQS_OFF
+- movl %esp, %eax
+- /* Set up the 16bit stack frame with switch32 pointer on top,
+- * and a switch16 pointer on top of the current frame. */
+- call setup_x86_bogus_stack
+- CFI_ADJUST_CFA_OFFSET -8 # frame has moved
+- TRACE_IRQS_IRET
+- RESTORE_REGS
+- lss 20+4(%esp), %esp # switch to 16bit stack
+-1: INTERRUPT_RETURN
+-.section __ex_table,"a"
+- .align 4
+- .long 1b,iret_exc
+-.previous
++ lss (%esp), %esp
++ CFI_ADJUST_CFA_OFFSET -8
++ jmp restore_nocheck
+ #else
+ ALIGN
+ restore_all_enable_events:
+@@ -540,7 +526,7 @@ ecrit: /**** END OF CRITICAL REGION ***
+
+ CFI_RESTORE_STATE
+ hypervisor_iret:
+- andl $~NMI_MASK, EFLAGS(%esp)
++ andl $~NMI_MASK, PT_EFLAGS(%esp)
+ RESTORE_REGS
+ addl $4, %esp
+ CFI_ADJUST_CFA_OFFSET -4
+@@ -556,7 +542,7 @@ work_pending:
+ jz work_notifysig
+ work_resched:
+ call schedule
+- DISABLE_INTERRUPTS # make sure we don't miss an interrupt
++ DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
+ # setting need_resched or sigpending
+ # between sampling and the iret
+ TRACE_IRQS_OFF
+@@ -569,7 +555,8 @@ work_resched:
+
+ work_notifysig: # deal with pending signals and
+ # notify-resume requests
+- testl $VM_MASK, EFLAGS(%esp)
++#ifdef CONFIG_VM86
++ testl $VM_MASK, PT_EFLAGS(%esp)
+ movl %esp, %eax
+ jne work_notifysig_v86 # returning to kernel-space or
+ # vm86-space
+@@ -579,29 +566,30 @@ work_notifysig: # deal with pending s
+
+ ALIGN
+ work_notifysig_v86:
+-#ifdef CONFIG_VM86
+ pushl %ecx # save ti_flags for do_notify_resume
+ CFI_ADJUST_CFA_OFFSET 4
+ call save_v86_state # %eax contains pt_regs pointer
+ popl %ecx
+ CFI_ADJUST_CFA_OFFSET -4
+ movl %eax, %esp
++#else
++ movl %esp, %eax
++#endif
+ xorl %edx, %edx
+ call do_notify_resume
+ jmp resume_userspace_sig
+-#endif
+
+ # perform syscall exit tracing
+ ALIGN
+ syscall_trace_entry:
+- movl $-ENOSYS,EAX(%esp)
++ movl $-ENOSYS,PT_EAX(%esp)
+ movl %esp, %eax
+ xorl %edx,%edx
+ call do_syscall_trace
+ cmpl $0, %eax
+ jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU,
+ # so must skip actual syscall
+- movl ORIG_EAX(%esp), %eax
++ movl PT_ORIG_EAX(%esp), %eax
+ cmpl $(nr_syscalls), %eax
+ jnae syscall_call
+ jmp syscall_exit
+@@ -612,7 +600,7 @@ syscall_exit_work:
+ testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl
+ jz work_pending
+ TRACE_IRQS_ON
+- ENABLE_INTERRUPTS # could let do_syscall_trace() call
++ ENABLE_INTERRUPTS(CLBR_ANY) # could let do_syscall_trace() call
+ # schedule() instead
+ movl %esp, %eax
+ movl $1, %edx
+@@ -626,40 +614,39 @@ syscall_fault:
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+- movl $-EFAULT,EAX(%esp)
++ movl $-EFAULT,PT_EAX(%esp)
+ jmp resume_userspace
+
+ syscall_badsys:
+- movl $-ENOSYS,EAX(%esp)
++ movl $-ENOSYS,PT_EAX(%esp)
+ jmp resume_userspace
+ CFI_ENDPROC
+
+ #ifndef CONFIG_XEN
+ #define FIXUP_ESPFIX_STACK \
+- movl %esp, %eax; \
+- /* switch to 32bit stack using the pointer on top of 16bit stack */ \
+- lss %ss:CPU_16BIT_STACK_SIZE-8, %esp; \
+- /* copy data from 16bit stack to 32bit stack */ \
+- call fixup_x86_bogus_stack; \
+- /* put ESP to the proper location */ \
+- movl %eax, %esp;
+-#define UNWIND_ESPFIX_STACK \
++ /* since we are on a wrong stack, we cant make it a C code :( */ \
++ movl %gs:PDA_cpu, %ebx; \
++ PER_CPU(cpu_gdt_descr, %ebx); \
++ movl GDS_address(%ebx), %ebx; \
++ GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah); \
++ addl %esp, %eax; \
++ pushl $__KERNEL_DS; \
++ CFI_ADJUST_CFA_OFFSET 4; \
+ pushl %eax; \
+ CFI_ADJUST_CFA_OFFSET 4; \
++ lss (%esp), %esp; \
++ CFI_ADJUST_CFA_OFFSET -8;
++#define UNWIND_ESPFIX_STACK \
+ movl %ss, %eax; \
+- /* see if on 16bit stack */ \
++ /* see if on espfix stack */ \
+ cmpw $__ESPFIX_SS, %ax; \
+- je 28f; \
+-27: popl %eax; \
+- CFI_ADJUST_CFA_OFFSET -4; \
+-.section .fixup,"ax"; \
+-28: movl $__KERNEL_DS, %eax; \
++ jne 27f; \
++ movl $__KERNEL_DS, %eax; \
+ movl %eax, %ds; \
+ movl %eax, %es; \
+- /* switch to 32bit stack */ \
++ /* switch to normal stack */ \
+ FIXUP_ESPFIX_STACK; \
+- jmp 27b; \
+-.previous
++27:;
+
+ /*
+ * Build the entry stubs and pointer table with
+@@ -723,13 +710,16 @@ KPROBE_ENTRY(page_fault)
+ CFI_ADJUST_CFA_OFFSET 4
+ ALIGN
+ error_code:
++ /* the function address is in %gs's slot on the stack */
++ pushl %es
++ CFI_ADJUST_CFA_OFFSET 4
++ /*CFI_REL_OFFSET es, 0*/
+ pushl %ds
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET ds, 0*/
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET eax, 0
+- xorl %eax, %eax
+ pushl %ebp
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebp, 0
+@@ -742,7 +732,6 @@ error_code:
+ pushl %edx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edx, 0
+- decl %eax # eax = -1
+ pushl %ecx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ecx, 0
+@@ -750,18 +739,20 @@ error_code:
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebx, 0
+ cld
+- pushl %es
++ pushl %gs
+ CFI_ADJUST_CFA_OFFSET 4
+- /*CFI_REL_OFFSET es, 0*/
++ /*CFI_REL_OFFSET gs, 0*/
++ movl $(__KERNEL_PDA), %ecx
++ movl %ecx, %gs
+ UNWIND_ESPFIX_STACK
+ popl %ecx
+ CFI_ADJUST_CFA_OFFSET -4
+ /*CFI_REGISTER es, ecx*/
+- movl ES(%esp), %edi # get the function address
+- movl ORIG_EAX(%esp), %edx # get the error code
+- movl %eax, ORIG_EAX(%esp)
+- movl %ecx, ES(%esp)
+- /*CFI_REL_OFFSET es, ES*/
++ movl PT_GS(%esp), %edi # get the function address
++ movl PT_ORIG_EAX(%esp), %edx # get the error code
++ movl $-1, PT_ORIG_EAX(%esp) # no syscall to restart
++ mov %ecx, PT_GS(%esp)
++ /*CFI_REL_OFFSET gs, ES*/
+ movl $(__USER_DS), %ecx
+ movl %ecx, %ds
+ movl %ecx, %es
+@@ -793,7 +784,7 @@ ENTRY(hypervisor_callback)
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+- movl EIP(%esp),%eax
++ movl PT_EIP(%esp),%eax
+ cmpl $scrit,%eax
+ jb 11f
+ cmpl $ecrit,%eax
+@@ -802,7 +793,7 @@ ENTRY(hypervisor_callback)
+ jb 11f
+ cmpl $sysexit_ecrit,%eax
+ ja 11f
+- addl $OLDESP,%esp # Remove eflags...ebx from stack frame.
++ addl $PT_OLDESP,%esp # Remove eflags...ebx from stack frame.
+ 11: push %esp
+ CFI_ADJUST_CFA_OFFSET 4
+ call evtchn_do_upcall
+@@ -824,7 +815,7 @@ critical_region_fixup:
+ jne 15f
+ xorl %ecx,%ecx
+ 15: leal (%esp,%ecx),%esi # %esi points at end of src region
+- leal OLDESP(%esp),%edi # %edi points at end of dst region
++ leal PT_OLDESP(%esp),%edi # %edi points at end of dst region
+ shrl $2,%ecx # convert words to bytes
+ je 17f # skip loop if nothing to copy
+ 16: subl $4,%esi # pre-decrementing copy loop
+@@ -848,8 +839,9 @@ critical_fixup_table:
+ .byte 0x18 # pop %eax
+ .byte 0x1c # pop %ds
+ .byte 0x20 # pop %es
+- .byte 0x24,0x24,0x24 # add $4,%esp
+- .byte 0x28 # iret
++ .byte 0x24,0x24 # pop %gs
++ .byte 0x28,0x28,0x28 # add $4,%esp
++ .byte 0x2c # iret
+ .byte 0xff,0xff,0xff,0xff # movb $1,1(%esi)
+ .byte 0x00,0x00 # jmp 11b
+ .previous
+@@ -940,7 +932,7 @@ ENTRY(device_not_available)
+ jmp ret_from_exception
+ device_available_emulate:
+ #endif
+- preempt_stop
++ preempt_stop(CLBR_ANY)
+ call math_state_restore
+ jmp ret_from_exception
+ CFI_ENDPROC
+@@ -1010,7 +1002,7 @@ KPROBE_ENTRY(nmi)
+ cmpw $__ESPFIX_SS, %ax
+ popl %eax
+ CFI_ADJUST_CFA_OFFSET -4
+- je nmi_16bit_stack
++ je nmi_espfix_stack
+ cmpl $sysenter_entry,(%esp)
+ je nmi_stack_fixup
+ pushl %eax
+@@ -1053,7 +1045,7 @@ nmi_debug_stack_check:
+ FIX_STACK(24,nmi_stack_correct, 1)
+ jmp nmi_stack_correct
+
+-nmi_16bit_stack:
++nmi_espfix_stack:
+ /* We have a RING0_INT_FRAME here.
+ *
+ * create the pointer to lss back
+@@ -1062,7 +1054,6 @@ nmi_16bit_stack:
+ CFI_ADJUST_CFA_OFFSET 4
+ pushl %esp
+ CFI_ADJUST_CFA_OFFSET 4
+- movzwl %sp, %esp
+ addw $4, (%esp)
+ /* copy the iret frame of 12 bytes */
+ .rept 3
+@@ -1073,11 +1064,11 @@ nmi_16bit_stack:
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ FIXUP_ESPFIX_STACK # %eax == %esp
+- CFI_ADJUST_CFA_OFFSET -20 # the frame has now moved
+ xorl %edx,%edx # zero error code
+ call do_nmi
+ RESTORE_REGS
+- lss 12+4(%esp), %esp # back to 16bit stack
++ lss 12+4(%esp), %esp # back to espfix stack
++ CFI_ADJUST_CFA_OFFSET -24
+ 1: INTERRUPT_RETURN
+ CFI_ENDPROC
+ .section __ex_table,"a"
+@@ -1093,12 +1084,25 @@ KPROBE_ENTRY(nmi)
+ xorl %edx,%edx # zero error code
+ movl %esp,%eax # pt_regs pointer
+ call do_nmi
+- orl $NMI_MASK, EFLAGS(%esp)
++ orl $NMI_MASK, PT_EFLAGS(%esp)
+ jmp restore_all
+ CFI_ENDPROC
+ #endif
+ KPROBE_END(nmi)
+
++#ifdef CONFIG_PARAVIRT
++ENTRY(native_iret)
++1: iret
++.section __ex_table,"a"
++ .align 4
++ .long 1b,iret_exc
++.previous
++
++ENTRY(native_irq_enable_sysexit)
++ sti
++ sysexit
++#endif
++
+ KPROBE_ENTRY(int3)
+ RING0_INT_FRAME
+ pushl $-1 # mark this as an int
+@@ -1214,37 +1218,6 @@ ENTRY(spurious_interrupt_bug)
+ CFI_ENDPROC
+ #endif /* !CONFIG_XEN */
+
+-#ifdef CONFIG_STACK_UNWIND
+-ENTRY(arch_unwind_init_running)
+- CFI_STARTPROC
+- movl 4(%esp), %edx
+- movl (%esp), %ecx
+- leal 4(%esp), %eax
+- movl %ebx, EBX(%edx)
+- xorl %ebx, %ebx
+- movl %ebx, ECX(%edx)
+- movl %ebx, EDX(%edx)
+- movl %esi, ESI(%edx)
+- movl %edi, EDI(%edx)
+- movl %ebp, EBP(%edx)
+- movl %ebx, EAX(%edx)
+- movl $__USER_DS, DS(%edx)
+- movl $__USER_DS, ES(%edx)
+- movl %ebx, ORIG_EAX(%edx)
+- movl %ecx, EIP(%edx)
+- movl 12(%esp), %ecx
+- movl $__KERNEL_CS, CS(%edx)
+- movl %ebx, EFLAGS(%edx)
+- movl %eax, OLDESP(%edx)
+- movl 8(%esp), %eax
+- movl %ecx, 8(%esp)
+- movl EBX(%edx), %ebx
+- movl $__KERNEL_DS, OLDSS(%edx)
+- jmpl *%eax
+- CFI_ENDPROC
+-ENDPROC(arch_unwind_init_running)
+-#endif
+-
+ ENTRY(fixup_4gb_segment)
+ RING0_EC_FRAME
+ pushl $do_fixup_4gb_segment
+Index: head-2008-12-01/arch/x86/kernel/head_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head_32-xen.S 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head_32-xen.S 2008-12-01 11:32:38.000000000 +0100
+@@ -9,6 +9,7 @@
+ #include <asm/cache.h>
+ #include <asm/thread_info.h>
+ #include <asm/asm-offsets.h>
++#include <asm/boot.h>
+ #include <asm/dwarf2.h>
+ #include <xen/interface/xen.h>
+ #include <xen/interface/elfnote.h>
+@@ -35,6 +36,8 @@ ENTRY(startup_32)
+ /* Set up the stack pointer */
+ movl $(init_thread_union+THREAD_SIZE),%esp
+
++ call setup_pda
++
+ /* get vendor info */
+ xorl %eax,%eax # call CPUID with 0 -> return vendor ID
+ XEN_CPUID
+@@ -57,14 +60,58 @@ ENTRY(startup_32)
+
+ movb $1,X86_HARD_MATH
+
+- xorl %eax,%eax # Clear FS/GS and LDT
++ xorl %eax,%eax # Clear FS
+ movl %eax,%fs
+- movl %eax,%gs
++
++ movl $(__KERNEL_PDA),%eax
++ mov %eax,%gs
++
+ cld # gcc2 wants the direction flag cleared at all times
+
+ pushl $0 # fake return address for unwinder
+ jmp start_kernel
+
++/*
++ * Point the GDT at this CPU's PDA. This will be
++ * cpu_gdt_table and boot_pda.
++ */
++setup_pda:
++ /* get the PDA pointer */
++ movl $boot_pda, %eax
++
++ /* slot the PDA address into the GDT */
++ mov $cpu_gdt_table, %ecx
++ mov %ax, (__KERNEL_PDA+0+2)(%ecx) /* base & 0x0000ffff */
++ shr $16, %eax
++ mov %al, (__KERNEL_PDA+4+0)(%ecx) /* base & 0x00ff0000 */
++ mov %ah, (__KERNEL_PDA+4+3)(%ecx) /* base & 0xff000000 */
++
++ # %esi still points to start_info, and no registers
++ # need to be preserved.
++
++ movl XEN_START_mfn_list(%esi), %ebx
++ movl $(cpu_gdt_table - __PAGE_OFFSET), %eax
++ shrl $PAGE_SHIFT, %eax
++ movl (%ebx,%eax,4), %ecx
++ pushl %ecx # frame number for set_gdt below
++
++ xorl %esi, %esi
++ xorl %edx, %edx
++ shldl $PAGE_SHIFT, %ecx, %edx
++ shll $PAGE_SHIFT, %ecx
++ orl $0x61, %ecx
++ movl $cpu_gdt_table, %ebx
++ movl $__HYPERVISOR_update_va_mapping, %eax
++ int $0x82
++
++ movl $(PAGE_SIZE_asm / 8), %ecx
++ movl %esp, %ebx
++ movl $__HYPERVISOR_set_gdt, %eax
++ int $0x82
++
++ popl %ecx
++ ret
++
+ #define HYPERCALL_PAGE_OFFSET 0x1000
+ .org HYPERCALL_PAGE_OFFSET
+ ENTRY(hypercall_page)
+@@ -93,7 +140,8 @@ ENTRY(empty_zero_page)
+ /*
+ * The Global Descriptor Table contains 28 quadwords, per-CPU.
+ */
+- .align L1_CACHE_BYTES
++ .section .data.page_aligned, "aw"
++ .align PAGE_SIZE_asm
+ ENTRY(cpu_gdt_table)
+ .quad 0x0000000000000000 /* NULL descriptor */
+ .quad 0x0000000000000000 /* 0x0b reserved */
+@@ -135,12 +183,13 @@ ENTRY(cpu_gdt_table)
+ .quad 0x0000000000000000 /* 0xc0 APM CS 16 code (16 bit) */
+ .quad 0x0000000000000000 /* 0xc8 APM DS data */
+
+- .quad 0x0000000000000000 /* 0xd0 - ESPFIX 16-bit SS */
+- .quad 0x0000000000000000 /* 0xd8 - unused */
++ .quad 0x0000000000000000 /* 0xd0 - ESPFIX SS */
++ .quad 0x00cf92000000ffff /* 0xd8 - PDA */
+ .quad 0x0000000000000000 /* 0xe0 - unused */
+ .quad 0x0000000000000000 /* 0xe8 - unused */
+ .quad 0x0000000000000000 /* 0xf0 - unused */
+ .quad 0x0000000000000000 /* 0xf8 - GDT entry 31: double-fault TSS */
++ .align PAGE_SIZE_asm
+
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ /*
+@@ -165,9 +214,9 @@ ENTRY(cpu_gdt_table)
+ .ascii ",ELF_PADDR_OFFSET=0x"
+ utoa __PAGE_OFFSET
+ .ascii ",VIRT_ENTRY=0x"
+- utoa (__PAGE_OFFSET + __PHYSICAL_START + VIRT_ENTRY_OFFSET)
++ utoa (__PAGE_OFFSET + LOAD_PHYSICAL_ADDR + VIRT_ENTRY_OFFSET)
+ .ascii ",HYPERCALL_PAGE=0x"
+- utoa ((__PHYSICAL_START+HYPERCALL_PAGE_OFFSET)>>PAGE_SHIFT)
++ utoa ((LOAD_PHYSICAL_ADDR+HYPERCALL_PAGE_OFFSET)>>PAGE_SHIFT)
+ .ascii ",FEATURES=writable_page_tables"
+ .ascii "|writable_descriptor_tables"
+ .ascii "|auto_translated_physmap"
+Index: head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -34,6 +34,7 @@
+ #include <linux/pci.h>
+ #include <linux/msi.h>
+ #include <linux/htirq.h>
++#include <linux/freezer.h>
+
+ #include <asm/io.h>
+ #include <asm/smp.h>
+@@ -199,14 +200,20 @@ static struct IO_APIC_route_entry ioapic
+ * the interrupt, and we need to make sure the entry is fully populated
+ * before that happens.
+ */
+-static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
++static void
++__ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
+ {
+- unsigned long flags;
+ union entry_union eu;
+ eu.entry = e;
+- spin_lock_irqsave(&ioapic_lock, flags);
+ io_apic_write(apic, 0x11 + 2*pin, eu.w2);
+ io_apic_write(apic, 0x10 + 2*pin, eu.w1);
++}
++
++static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
++{
++ unsigned long flags;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ __ioapic_write_entry(apic, pin, e);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+
+@@ -889,8 +896,7 @@ static int __init find_isa_irq_pin(int i
+
+ if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
+ mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_MCA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_NEC98
++ mp_bus_id_to_type[lbus] == MP_BUS_MCA
+ ) &&
+ (mp_irqs[i].mpc_irqtype == type) &&
+ (mp_irqs[i].mpc_srcbusirq == irq))
+@@ -909,8 +915,7 @@ static int __init find_isa_irq_apic(int
+
+ if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
+ mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_MCA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_NEC98
++ mp_bus_id_to_type[lbus] == MP_BUS_MCA
+ ) &&
+ (mp_irqs[i].mpc_irqtype == type) &&
+ (mp_irqs[i].mpc_srcbusirq == irq))
+@@ -1043,12 +1048,6 @@ static int EISA_ELCR(unsigned int irq)
+ #define default_MCA_trigger(idx) (1)
+ #define default_MCA_polarity(idx) (0)
+
+-/* NEC98 interrupts are always polarity zero edge triggered,
+- * when listed as conforming in the MP table. */
+-
+-#define default_NEC98_trigger(idx) (0)
+-#define default_NEC98_polarity(idx) (0)
+-
+ static int __init MPBIOS_polarity(int idx)
+ {
+ int bus = mp_irqs[idx].mpc_srcbus;
+@@ -1083,11 +1082,6 @@ static int __init MPBIOS_polarity(int id
+ polarity = default_MCA_polarity(idx);
+ break;
+ }
+- case MP_BUS_NEC98: /* NEC 98 pin */
+- {
+- polarity = default_NEC98_polarity(idx);
+- break;
+- }
+ default:
+ {
+ printk(KERN_WARNING "broken BIOS!!\n");
+@@ -1157,11 +1151,6 @@ static int MPBIOS_trigger(int idx)
+ trigger = default_MCA_trigger(idx);
+ break;
+ }
+- case MP_BUS_NEC98: /* NEC 98 pin */
+- {
+- trigger = default_NEC98_trigger(idx);
+- break;
+- }
+ default:
+ {
+ printk(KERN_WARNING "broken BIOS!!\n");
+@@ -1223,7 +1212,6 @@ static int pin_2_irq(int idx, int apic,
+ case MP_BUS_ISA: /* ISA pin */
+ case MP_BUS_EISA:
+ case MP_BUS_MCA:
+- case MP_BUS_NEC98:
+ {
+ irq = mp_irqs[idx].mpc_srcbusirq;
+ break;
+@@ -1291,7 +1279,7 @@ static inline int IO_APIC_irq_trigger(in
+ }
+
+ /* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
+-u8 irq_vector[NR_IRQ_VECTORS] __read_mostly; /* = { FIRST_DEVICE_VECTOR , 0 }; */
++static u8 irq_vector[NR_IRQ_VECTORS] __read_mostly; /* = { FIRST_DEVICE_VECTOR , 0 }; */
+
+ static int __assign_irq_vector(int irq)
+ {
+@@ -1417,8 +1405,8 @@ static void __init setup_IO_APIC_irqs(vo
+ if (!apic && (irq < 16))
+ disable_8259A_irq(irq);
+ }
+- ioapic_write_entry(apic, pin, entry);
+ spin_lock_irqsave(&ioapic_lock, flags);
++ __ioapic_write_entry(apic, pin, entry);
+ set_native_irq_info(irq, TARGET_CPUS);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+@@ -1988,6 +1976,15 @@ static void __init setup_ioapic_ids_from
+ #endif
+
+ #ifndef CONFIG_XEN
++static int no_timer_check __initdata;
++
++static int __init notimercheck(char *s)
++{
++ no_timer_check = 1;
++ return 1;
++}
++__setup("no_timer_check", notimercheck);
++
+ /*
+ * There is a nasty bug in some older SMP boards, their mptable lies
+ * about the timer IRQ. We do the following to work around the situation:
+@@ -1996,10 +1993,13 @@ static void __init setup_ioapic_ids_from
+ * - if this function detects that timer IRQs are defunct, then we fall
+ * back to ISA timer IRQs
+ */
+-static int __init timer_irq_works(void)
++int __init timer_irq_works(void)
+ {
+ unsigned long t1 = jiffies;
+
++ if (no_timer_check)
++ return 1;
++
+ local_irq_enable();
+ /* Let ten ticks pass... */
+ mdelay((10 * 1000) / HZ);
+@@ -2226,9 +2226,15 @@ static inline void unlock_ExtINT_logic(v
+ unsigned char save_control, save_freq_select;
+
+ pin = find_isa_irq_pin(8, mp_INT);
++ if (pin == -1) {
++ WARN_ON_ONCE(1);
++ return;
++ }
+ apic = find_isa_irq_apic(8, mp_INT);
+- if (pin == -1)
++ if (apic == -1) {
++ WARN_ON_ONCE(1);
+ return;
++ }
+
+ entry0 = ioapic_read_entry(apic, pin);
+ clear_IO_APIC_pin(apic, pin);
+@@ -2273,7 +2279,7 @@ int timer_uses_ioapic_pin_0;
+ * is so screwy. Thanks to Brian Perkins for testing/hacking this beast
+ * fanatically on his truly buggy board.
+ */
+-static inline void check_timer(void)
++static inline void __init check_timer(void)
+ {
+ int apic1, pin1, apic2, pin2;
+ int vector;
+@@ -2558,7 +2564,7 @@ device_initcall(ioapic_init_sysfs);
+ int create_irq(void)
+ {
+ /* Allocate an unused irq */
+- int irq, new, vector;
++ int irq, new, vector = 0;
+ unsigned long flags;
+
+ irq = -ENOSPC;
+@@ -2939,8 +2945,8 @@ int io_apic_set_pci_routing (int ioapic,
+ if (!ioapic && (irq < 16))
+ disable_8259A_irq(irq);
+
+- ioapic_write_entry(ioapic, pin, entry);
+ spin_lock_irqsave(&ioapic_lock, flags);
++ __ioapic_write_entry(ioapic, pin, entry);
+ set_native_irq_info(irq, TARGET_CPUS);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+Index: head-2008-12-01/arch/x86/kernel/ldt_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ldt_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ldt_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -177,16 +177,14 @@ static int read_default_ldt(void __user
+ {
+ int err;
+ unsigned long size;
+- void *address;
+
+ err = 0;
+- address = &default_ldt[0];
+ size = 5*sizeof(struct desc_struct);
+ if (size > bytecount)
+ size = bytecount;
+
+ err = size;
+- if (copy_to_user(ptr, address, size))
++ if (clear_user(ptr, size))
+ err = -EFAULT;
+
+ return err;
+Index: head-2008-12-01/arch/x86/kernel/microcode-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/microcode-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/microcode-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -1,7 +1,7 @@
+ /*
+ * Intel CPU Microcode Update Driver for Linux
+ *
+- * Copyright (C) 2000-2004 Tigran Aivazian
++ * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
+ * 2006 Shaohua Li <shaohua.li@intel.com>
+ *
+ * This driver allows to upgrade microcode on Intel processors
+@@ -43,7 +43,7 @@
+ #include <asm/processor.h>
+
+ MODULE_DESCRIPTION("Intel CPU (IA-32) Microcode Update Driver");
+-MODULE_AUTHOR("Tigran Aivazian <tigran@veritas.com>");
++MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
+ MODULE_LICENSE("GPL");
+
+ static int verbose;
+@@ -195,7 +195,7 @@ static int __init microcode_init (void)
+ request_microcode();
+
+ printk(KERN_INFO
+- "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@veritas.com>\n");
++ "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
+ return 0;
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/mpparse_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/mpparse_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/mpparse_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -36,7 +36,7 @@
+
+ /* Have we found an MP table */
+ int smp_found_config;
+-unsigned int __initdata maxcpus = NR_CPUS;
++unsigned int __cpuinitdata maxcpus = NR_CPUS;
+
+ /*
+ * Various Linux-internal data structures created from the
+@@ -102,10 +102,10 @@ static int __init mpf_checksum(unsigned
+ */
+
+ static int mpc_record;
+-static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY] __initdata;
++static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY] __cpuinitdata;
+
+ #ifndef CONFIG_XEN
+-static void __devinit MP_processor_info (struct mpc_config_processor *m)
++static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
+ {
+ int ver, apicid;
+ physid_mask_t phys_cpu;
+@@ -221,7 +221,7 @@ static void __devinit MP_processor_info
+ bios_cpu_apicid[num_processors - 1] = m->mpc_apicid;
+ }
+ #else
+-void __init MP_processor_info (struct mpc_config_processor *m)
++static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
+ {
+ num_processors++;
+ }
+@@ -256,8 +256,6 @@ static void __init MP_bus_info (struct m
+ mp_current_pci_id++;
+ } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA)-1) == 0) {
+ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
+- } else if (strncmp(str, BUSTYPE_NEC98, sizeof(BUSTYPE_NEC98)-1) == 0) {
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_NEC98;
+ } else {
+ printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
+ }
+@@ -842,7 +840,7 @@ void __init mp_register_lapic_address(u6
+ #endif
+ }
+
+-void __devinit mp_register_lapic (u8 id, u8 enabled)
++void __cpuinit mp_register_lapic (u8 id, u8 enabled)
+ {
+ struct mpc_config_processor processor;
+ int boot_cpu = 0;
+Index: head-2008-12-01/arch/x86/kernel/pci-dma-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -276,7 +276,7 @@ EXPORT_SYMBOL(dma_free_coherent);
+ int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+ dma_addr_t device_addr, size_t size, int flags)
+ {
+- void __iomem *mem_base;
++ void __iomem *mem_base = NULL;
+ int pages = size >> PAGE_SHIFT;
+ int bitmap_size = (pages + 31)/32;
+
+@@ -293,14 +293,12 @@ int dma_declare_coherent_memory(struct d
+ if (!mem_base)
+ goto out;
+
+- dev->dma_mem = kmalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL);
++ dev->dma_mem = kzalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL);
+ if (!dev->dma_mem)
+ goto out;
+- memset(dev->dma_mem, 0, sizeof(struct dma_coherent_mem));
+- dev->dma_mem->bitmap = kmalloc(bitmap_size, GFP_KERNEL);
++ dev->dma_mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+ if (!dev->dma_mem->bitmap)
+ goto free1_out;
+- memset(dev->dma_mem->bitmap, 0, bitmap_size);
+
+ dev->dma_mem->virt_base = mem_base;
+ dev->dma_mem->device_base = device_addr;
+@@ -315,6 +313,8 @@ int dma_declare_coherent_memory(struct d
+ free1_out:
+ kfree(dev->dma_mem->bitmap);
+ out:
++ if (mem_base)
++ iounmap(mem_base);
+ return 0;
+ }
+ EXPORT_SYMBOL(dma_declare_coherent_memory);
+Index: head-2008-12-01/arch/x86/kernel/process_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -60,6 +60,7 @@
+
+ #include <asm/tlbflush.h>
+ #include <asm/cpu.h>
++#include <asm/pda.h>
+
+ asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
+
+@@ -104,28 +105,24 @@ EXPORT_SYMBOL(enable_hlt);
+ */
+ static void poll_idle (void)
+ {
+- local_irq_enable();
+-
+- asm volatile(
+- "2:"
+- "testl %0, %1;"
+- "rep; nop;"
+- "je 2b;"
+- : : "i"(_TIF_NEED_RESCHED), "m" (current_thread_info()->flags));
++ cpu_relax();
+ }
+
+ static void xen_idle(void)
+ {
+- local_irq_disable();
++ current_thread_info()->status &= ~TS_POLLING;
++ /*
++ * TS_POLLING-cleared state must be visible before we
++ * test NEED_RESCHED:
++ */
++ smp_mb();
+
+- if (need_resched())
++ local_irq_disable();
++ if (!need_resched())
++ safe_halt(); /* enables interrupts racelessly */
++ else
+ local_irq_enable();
+- else {
+- current_thread_info()->status &= ~TS_POLLING;
+- smp_mb__after_clear_bit();
+- safe_halt();
+- current_thread_info()->status |= TS_POLLING;
+- }
++ current_thread_info()->status |= TS_POLLING;
+ }
+ #ifdef CONFIG_APM_MODULE
+ EXPORT_SYMBOL(default_idle);
+@@ -250,8 +247,8 @@ void show_regs(struct pt_regs * regs)
+ regs->eax,regs->ebx,regs->ecx,regs->edx);
+ printk("ESI: %08lx EDI: %08lx EBP: %08lx",
+ regs->esi, regs->edi, regs->ebp);
+- printk(" DS: %04x ES: %04x\n",
+- 0xffff & regs->xds,0xffff & regs->xes);
++ printk(" DS: %04x ES: %04x GS: %04x\n",
++ 0xffff & regs->xds,0xffff & regs->xes, 0xffff & regs->xgs);
+
+ cr0 = read_cr0();
+ cr2 = read_cr2();
+@@ -282,6 +279,7 @@ int kernel_thread(int (*fn)(void *), voi
+
+ regs.xds = __USER_DS;
+ regs.xes = __USER_DS;
++ regs.xgs = __KERNEL_PDA;
+ regs.orig_eax = -1;
+ regs.eip = (unsigned long) kernel_thread_helper;
+ regs.xcs = __KERNEL_CS | get_kernel_rpl();
+@@ -359,7 +357,6 @@ int copy_thread(int nr, unsigned long cl
+ p->thread.eip = (unsigned long) ret_from_fork;
+
+ savesegment(fs,p->thread.fs);
+- savesegment(gs,p->thread.gs);
+
+ tsk = current;
+ if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
+@@ -438,7 +435,7 @@ void dump_thread(struct pt_regs * regs,
+ dump->regs.ds = regs->xds;
+ dump->regs.es = regs->xes;
+ savesegment(fs,dump->regs.fs);
+- savesegment(gs,dump->regs.gs);
++ dump->regs.gs = regs->xgs;
+ dump->regs.orig_eax = regs->orig_eax;
+ dump->regs.eip = regs->eip;
+ dump->regs.cs = regs->xcs;
+@@ -635,17 +632,19 @@ struct task_struct fastcall * __switch_t
+ if (unlikely(HYPERVISOR_multicall_check(_mcl, mcl - _mcl, NULL)))
+ BUG();
+
++ /* we're going to use this soon, after a few expensive things */
++ if (next_p->fpu_counter > 5)
++ prefetch(&next->i387.fxsave);
++
+ /*
+- * Restore %fs and %gs if needed.
++ * Restore %fs if needed.
+ *
+- * Glibc normally makes %fs be zero, and %gs is one of
+- * the TLS segments.
++ * Glibc normally makes %fs be zero.
+ */
+ if (unlikely(next->fs))
+ loadsegment(fs, next->fs);
+
+- if (next->gs)
+- loadsegment(gs, next->gs);
++ write_pda(pcurrent, next_p);
+
+ /*
+ * Now maybe handle debug registers
+@@ -655,6 +654,13 @@ struct task_struct fastcall * __switch_t
+
+ disable_tsc(prev_p, next_p);
+
++ /* If the task has used fpu the last 5 timeslices, just do a full
++ * restore of the math state immediately to avoid the trap; the
++ * chances of needing FPU soon are obviously high now
++ */
++ if (next_p->fpu_counter > 5)
++ math_state_restore();
++
+ return prev_p;
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/quirks-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/quirks-xen.c 2008-01-28 12:24:19.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/quirks-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -3,10 +3,12 @@
+ */
+ #include <linux/pci.h>
+ #include <linux/irq.h>
++#include <asm/pci-direct.h>
++#include <asm/genapic.h>
++#include <asm/cpu.h>
+
+ #if defined(CONFIG_X86_IO_APIC) && (defined(CONFIG_SMP) || defined(CONFIG_XEN)) && defined(CONFIG_PCI)
+-
+-static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
++static void __devinit verify_quirk_intel_irqbalance(struct pci_dev *dev)
+ {
+ u8 config, rev;
+ u32 word;
+@@ -14,14 +16,12 @@ static void __devinit quirk_intel_irqbal
+ /* BIOS may enable hardware IRQ balancing for
+ * E7520/E7320/E7525(revision ID 0x9 and below)
+ * based platforms.
+- * Disable SW irqbalance/affinity on those platforms.
++ * For those platforms, make sure that the genapic is set to 'flat'
+ */
+ pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
+ if (rev > 0x9)
+ return;
+
+- printk(KERN_INFO "Intel E7520/7320/7525 detected.");
+-
+ /* enable access to config space*/
+ pci_read_config_byte(dev, 0xf4, &config);
+ pci_write_config_byte(dev, 0xf4, config|0x2);
+@@ -30,6 +30,46 @@ static void __devinit quirk_intel_irqbal
+ raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
+
+ if (!(word & (1 << 13))) {
++#ifndef CONFIG_XEN
++#ifdef CONFIG_X86_64
++ if (genapic != &apic_flat)
++ panic("APIC mode must be flat on this system\n");
++#elif defined(CONFIG_X86_GENERICARCH)
++ if (genapic != &apic_default)
++ panic("APIC mode must be default(flat) on this system. Use apic=default\n");
++#endif
++#endif
++ }
++
++ /* put back the original value for config space*/
++ if (!(config & 0x2))
++ pci_write_config_byte(dev, 0xf4, config);
++}
++
++void __init quirk_intel_irqbalance(void)
++{
++ u8 config, rev;
++ u32 word;
++
++ /* BIOS may enable hardware IRQ balancing for
++ * E7520/E7320/E7525(revision ID 0x9 and below)
++ * based platforms.
++ * Disable SW irqbalance/affinity on those platforms.
++ */
++ rev = read_pci_config_byte(0, 0, 0, PCI_CLASS_REVISION);
++ if (rev > 0x9)
++ return;
++
++ printk(KERN_INFO "Intel E7520/7320/7525 detected.");
++
++ /* enable access to config space */
++ config = read_pci_config_byte(0, 0, 0, 0xf4);
++ write_pci_config_byte(0, 0, 0, 0xf4, config|0x2);
++
++ /* read xTPR register */
++ word = read_pci_config_16(0, 0, 0x40, 0x4c);
++
++ if (!(word & (1 << 13))) {
+ struct xen_platform_op op;
+ printk(KERN_INFO "Disabling irq balancing and affinity\n");
+ op.cmd = XENPF_platform_quirk;
+@@ -37,11 +77,12 @@ static void __devinit quirk_intel_irqbal
+ WARN_ON(HYPERVISOR_platform_op(&op));
+ }
+
+- /* put back the original value for config space*/
++ /* put back the original value for config space */
+ if (!(config & 0x2))
+- pci_write_config_byte(dev, 0xf4, config);
++ write_pci_config_byte(0, 0, 0, 0xf4, config);
+ }
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_intel_irqbalance);
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_intel_irqbalance);
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, verify_quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, verify_quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, verify_quirk_intel_irqbalance);
++
+ #endif
+Index: head-2008-12-01/arch/x86/kernel/setup_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -76,9 +76,6 @@
+ #include <xen/interface/kexec.h>
+ #endif
+
+-/* Forward Declaration. */
+-void __init find_max_pfn(void);
+-
+ static int xen_panic_event(struct notifier_block *, unsigned long, void *);
+ static struct notifier_block xen_panic_block = {
+ xen_panic_event, NULL, 0 /* try to go last */
+@@ -89,14 +86,11 @@ int disable_pse __devinitdata = 0;
+ /*
+ * Machine setup..
+ */
+-
+-#ifdef CONFIG_EFI
+-int efi_enabled = 0;
+-EXPORT_SYMBOL(efi_enabled);
+-#endif
++extern struct resource code_resource;
++extern struct resource data_resource;
+
+ /* cpu data as detected by the assembly code in head.S */
+-struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
++struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
+ /* common cpu data for all cpus */
+ struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
+ EXPORT_SYMBOL(boot_cpu_data);
+@@ -112,12 +106,6 @@ unsigned int machine_submodel_id;
+ unsigned int BIOS_revision;
+ unsigned int mca_pentium_flag;
+
+-/* For PCI or other memory-mapped resources */
+-unsigned long pci_mem_start = 0x10000000;
+-#ifdef CONFIG_PCI
+-EXPORT_SYMBOL(pci_mem_start);
+-#endif
+-
+ /* Boot loader ID as an integer, for the benefit of proc_dointvec */
+ int bootloader_type;
+
+@@ -150,10 +138,6 @@ struct ist_info ist_info;
+ defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
+ EXPORT_SYMBOL(ist_info);
+ #endif
+-struct e820map e820;
+-#ifdef CONFIG_XEN
+-struct e820map machine_e820;
+-#endif
+
+ extern void early_cpu_init(void);
+ extern int root_mountflags;
+@@ -168,209 +152,6 @@ static char command_line[COMMAND_LINE_SI
+
+ unsigned char __initdata boot_params[PARAM_SIZE];
+
+-static struct resource data_resource = {
+- .name = "Kernel data",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-static struct resource code_resource = {
+- .name = "Kernel code",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-static struct resource system_rom_resource = {
+- .name = "System ROM",
+- .start = 0xf0000,
+- .end = 0xfffff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-};
+-
+-static struct resource extension_rom_resource = {
+- .name = "Extension ROM",
+- .start = 0xe0000,
+- .end = 0xeffff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-};
+-
+-static struct resource adapter_rom_resources[] = { {
+- .name = "Adapter ROM",
+- .start = 0xc8000,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-} };
+-
+-static struct resource video_rom_resource = {
+- .name = "Video ROM",
+- .start = 0xc0000,
+- .end = 0xc7fff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-};
+-
+-static struct resource video_ram_resource = {
+- .name = "Video RAM area",
+- .start = 0xa0000,
+- .end = 0xbffff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-static struct resource standard_io_resources[] = { {
+- .name = "dma1",
+- .start = 0x0000,
+- .end = 0x001f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "pic1",
+- .start = 0x0020,
+- .end = 0x0021,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "timer0",
+- .start = 0x0040,
+- .end = 0x0043,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "timer1",
+- .start = 0x0050,
+- .end = 0x0053,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "keyboard",
+- .start = 0x0060,
+- .end = 0x006f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "dma page reg",
+- .start = 0x0080,
+- .end = 0x008f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "pic2",
+- .start = 0x00a0,
+- .end = 0x00a1,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "dma2",
+- .start = 0x00c0,
+- .end = 0x00df,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "fpu",
+- .start = 0x00f0,
+- .end = 0x00ff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-} };
+-
+-#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
+-
+-static int __init romchecksum(unsigned char *rom, unsigned long length)
+-{
+- unsigned char *p, sum = 0;
+-
+- for (p = rom; p < rom + length; p++)
+- sum += *p;
+- return sum == 0;
+-}
+-
+-static void __init probe_roms(void)
+-{
+- unsigned long start, length, upper;
+- unsigned char *rom;
+- int i;
+-
+-#ifdef CONFIG_XEN
+- /* Nothing to do if not running in dom0. */
+- if (!is_initial_xendomain())
+- return;
+-#endif
+-
+- /* video rom */
+- upper = adapter_rom_resources[0].start;
+- for (start = video_rom_resource.start; start < upper; start += 2048) {
+- rom = isa_bus_to_virt(start);
+- if (!romsignature(rom))
+- continue;
+-
+- video_rom_resource.start = start;
+-
+- /* 0 < length <= 0x7f * 512, historically */
+- length = rom[2] * 512;
+-
+- /* if checksum okay, trust length byte */
+- if (length && romchecksum(rom, length))
+- video_rom_resource.end = start + length - 1;
+-
+- request_resource(&iomem_resource, &video_rom_resource);
+- break;
+- }
+-
+- start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
+- if (start < upper)
+- start = upper;
+-
+- /* system rom */
+- request_resource(&iomem_resource, &system_rom_resource);
+- upper = system_rom_resource.start;
+-
+- /* check for extension rom (ignore length byte!) */
+- rom = isa_bus_to_virt(extension_rom_resource.start);
+- if (romsignature(rom)) {
+- length = extension_rom_resource.end - extension_rom_resource.start + 1;
+- if (romchecksum(rom, length)) {
+- request_resource(&iomem_resource, &extension_rom_resource);
+- upper = extension_rom_resource.start;
+- }
+- }
+-
+- /* check for adapter roms on 2k boundaries */
+- for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
+- rom = isa_bus_to_virt(start);
+- if (!romsignature(rom))
+- continue;
+-
+- /* 0 < length <= 0x7f * 512, historically */
+- length = rom[2] * 512;
+-
+- /* but accept any length that fits if checksum okay */
+- if (!length || start + length > upper || !romchecksum(rom, length))
+- continue;
+-
+- adapter_rom_resources[i].start = start;
+- adapter_rom_resources[i].end = start + length - 1;
+- request_resource(&iomem_resource, &adapter_rom_resources[i]);
+-
+- start = adapter_rom_resources[i++].end & ~2047UL;
+- }
+-}
+-
+ /*
+ * Point at the empty zero page to start with. We map the real shared_info
+ * page as soon as fixmap is up and running.
+@@ -386,353 +167,6 @@ EXPORT_SYMBOL(phys_to_machine_mapping);
+ start_info_t *xen_start_info;
+ EXPORT_SYMBOL(xen_start_info);
+
+-void __init add_memory_region(unsigned long long start,
+- unsigned long long size, int type)
+-{
+- int x;
+-
+- if (!efi_enabled) {
+- x = e820.nr_map;
+-
+- if (x == E820MAX) {
+- printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
+- return;
+- }
+-
+- e820.map[x].addr = start;
+- e820.map[x].size = size;
+- e820.map[x].type = type;
+- e820.nr_map++;
+- }
+-} /* add_memory_region */
+-
+-static void __init limit_regions(unsigned long long size)
+-{
+- unsigned long long current_addr = 0;
+- int i;
+-
+- if (efi_enabled) {
+- efi_memory_desc_t *md;
+- void *p;
+-
+- for (p = memmap.map, i = 0; p < memmap.map_end;
+- p += memmap.desc_size, i++) {
+- md = p;
+- current_addr = md->phys_addr + (md->num_pages << 12);
+- if (md->type == EFI_CONVENTIONAL_MEMORY) {
+- if (current_addr >= size) {
+- md->num_pages -=
+- (((current_addr-size) + PAGE_SIZE-1) >> PAGE_SHIFT);
+- memmap.nr_map = i + 1;
+- return;
+- }
+- }
+- }
+- }
+- for (i = 0; i < e820.nr_map; i++) {
+- current_addr = e820.map[i].addr + e820.map[i].size;
+- if (current_addr < size)
+- continue;
+-
+- if (e820.map[i].type != E820_RAM)
+- continue;
+-
+- if (e820.map[i].addr >= size) {
+- /*
+- * This region starts past the end of the
+- * requested size, skip it completely.
+- */
+- e820.nr_map = i;
+- } else {
+- e820.nr_map = i + 1;
+- e820.map[i].size -= current_addr - size;
+- }
+- return;
+- }
+-#ifdef CONFIG_XEN
+- if (i==e820.nr_map && current_addr < size) {
+- /*
+- * The e820 map finished before our requested size so
+- * extend the final entry to the requested address.
+- */
+- --i;
+- if (e820.map[i].type == E820_RAM)
+- e820.map[i].size -= current_addr - size;
+- else
+- add_memory_region(current_addr, size - current_addr, E820_RAM);
+- }
+-#endif
+-}
+-
+-#define E820_DEBUG 1
+-
+-static void __init print_memory_map(char *who)
+-{
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- printk(" %s: %016Lx - %016Lx ", who,
+- e820.map[i].addr,
+- e820.map[i].addr + e820.map[i].size);
+- switch (e820.map[i].type) {
+- case E820_RAM: printk("(usable)\n");
+- break;
+- case E820_RESERVED:
+- printk("(reserved)\n");
+- break;
+- case E820_ACPI:
+- printk("(ACPI data)\n");
+- break;
+- case E820_NVS:
+- printk("(ACPI NVS)\n");
+- break;
+- default: printk("type %lu\n", e820.map[i].type);
+- break;
+- }
+- }
+-}
+-
+-/*
+- * Sanitize the BIOS e820 map.
+- *
+- * Some e820 responses include overlapping entries. The following
+- * replaces the original e820 map with a new one, removing overlaps.
+- *
+- */
+-struct change_member {
+- struct e820entry *pbios; /* pointer to original bios entry */
+- unsigned long long addr; /* address for this change point */
+-};
+-static struct change_member change_point_list[2*E820MAX] __initdata;
+-static struct change_member *change_point[2*E820MAX] __initdata;
+-static struct e820entry *overlap_list[E820MAX] __initdata;
+-static struct e820entry new_bios[E820MAX] __initdata;
+-
+-int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
+-{
+- struct change_member *change_tmp;
+- unsigned long current_type, last_type;
+- unsigned long long last_addr;
+- int chgidx, still_changing;
+- int overlap_entries;
+- int new_bios_entry;
+- int old_nr, new_nr, chg_nr;
+- int i;
+-
+- /*
+- Visually we're performing the following (1,2,3,4 = memory types)...
+-
+- Sample memory map (w/overlaps):
+- ____22__________________
+- ______________________4_
+- ____1111________________
+- _44_____________________
+- 11111111________________
+- ____________________33__
+- ___________44___________
+- __________33333_________
+- ______________22________
+- ___________________2222_
+- _________111111111______
+- _____________________11_
+- _________________4______
+-
+- Sanitized equivalent (no overlap):
+- 1_______________________
+- _44_____________________
+- ___1____________________
+- ____22__________________
+- ______11________________
+- _________1______________
+- __________3_____________
+- ___________44___________
+- _____________33_________
+- _______________2________
+- ________________1_______
+- _________________4______
+- ___________________2____
+- ____________________33__
+- ______________________4_
+- */
+-
+- /* if there's only one memory region, don't bother */
+- if (*pnr_map < 2)
+- return -1;
+-
+- old_nr = *pnr_map;
+-
+- /* bail out if we find any unreasonable addresses in bios map */
+- for (i=0; i<old_nr; i++)
+- if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
+- return -1;
+-
+- /* create pointers for initial change-point information (for sorting) */
+- for (i=0; i < 2*old_nr; i++)
+- change_point[i] = &change_point_list[i];
+-
+- /* record all known change-points (starting and ending addresses),
+- omitting those that are for empty memory regions */
+- chgidx = 0;
+- for (i=0; i < old_nr; i++) {
+- if (biosmap[i].size != 0) {
+- change_point[chgidx]->addr = biosmap[i].addr;
+- change_point[chgidx++]->pbios = &biosmap[i];
+- change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
+- change_point[chgidx++]->pbios = &biosmap[i];
+- }
+- }
+- chg_nr = chgidx; /* true number of change-points */
+-
+- /* sort change-point list by memory addresses (low -> high) */
+- still_changing = 1;
+- while (still_changing) {
+- still_changing = 0;
+- for (i=1; i < chg_nr; i++) {
+- /* if <current_addr> > <last_addr>, swap */
+- /* or, if current=<start_addr> & last=<end_addr>, swap */
+- if ((change_point[i]->addr < change_point[i-1]->addr) ||
+- ((change_point[i]->addr == change_point[i-1]->addr) &&
+- (change_point[i]->addr == change_point[i]->pbios->addr) &&
+- (change_point[i-1]->addr != change_point[i-1]->pbios->addr))
+- )
+- {
+- change_tmp = change_point[i];
+- change_point[i] = change_point[i-1];
+- change_point[i-1] = change_tmp;
+- still_changing=1;
+- }
+- }
+- }
+-
+- /* create a new bios memory map, removing overlaps */
+- overlap_entries=0; /* number of entries in the overlap table */
+- new_bios_entry=0; /* index for creating new bios map entries */
+- last_type = 0; /* start with undefined memory type */
+- last_addr = 0; /* start with 0 as last starting address */
+- /* loop through change-points, determining affect on the new bios map */
+- for (chgidx=0; chgidx < chg_nr; chgidx++)
+- {
+- /* keep track of all overlapping bios entries */
+- if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
+- {
+- /* add map entry to overlap list (> 1 entry implies an overlap) */
+- overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
+- }
+- else
+- {
+- /* remove entry from list (order independent, so swap with last) */
+- for (i=0; i<overlap_entries; i++)
+- {
+- if (overlap_list[i] == change_point[chgidx]->pbios)
+- overlap_list[i] = overlap_list[overlap_entries-1];
+- }
+- overlap_entries--;
+- }
+- /* if there are overlapping entries, decide which "type" to use */
+- /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
+- current_type = 0;
+- for (i=0; i<overlap_entries; i++)
+- if (overlap_list[i]->type > current_type)
+- current_type = overlap_list[i]->type;
+- /* continue building up new bios map based on this information */
+- if (current_type != last_type) {
+- if (last_type != 0) {
+- new_bios[new_bios_entry].size =
+- change_point[chgidx]->addr - last_addr;
+- /* move forward only if the new size was non-zero */
+- if (new_bios[new_bios_entry].size != 0)
+- if (++new_bios_entry >= E820MAX)
+- break; /* no more space left for new bios entries */
+- }
+- if (current_type != 0) {
+- new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
+- new_bios[new_bios_entry].type = current_type;
+- last_addr=change_point[chgidx]->addr;
+- }
+- last_type = current_type;
+- }
+- }
+- new_nr = new_bios_entry; /* retain count for new bios entries */
+-
+- /* copy new bios mapping into original location */
+- memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
+- *pnr_map = new_nr;
+-
+- return 0;
+-}
+-
+-/*
+- * Copy the BIOS e820 map into a safe place.
+- *
+- * Sanity-check it while we're at it..
+- *
+- * If we're lucky and live on a modern system, the setup code
+- * will have given us a memory map that we can use to properly
+- * set up memory. If we aren't, we'll fake a memory map.
+- *
+- * We check to see that the memory map contains at least 2 elements
+- * before we'll use it, because the detection code in setup.S may
+- * not be perfect and most every PC known to man has two memory
+- * regions: one from 0 to 640k, and one from 1mb up. (The IBM
+- * thinkpad 560x, for example, does not cooperate with the memory
+- * detection code.)
+- */
+-int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
+-{
+-#ifndef CONFIG_XEN
+- /* Only one memory region (or negative)? Ignore it */
+- if (nr_map < 2)
+- return -1;
+-#else
+- BUG_ON(nr_map < 1);
+-#endif
+-
+- do {
+- unsigned long long start = biosmap->addr;
+- unsigned long long size = biosmap->size;
+- unsigned long long end = start + size;
+- unsigned long type = biosmap->type;
+-
+- /* Overflow in 64 bits? Ignore the memory map. */
+- if (start > end)
+- return -1;
+-
+-#ifndef CONFIG_XEN
+- /*
+- * Some BIOSes claim RAM in the 640k - 1M region.
+- * Not right. Fix it up.
+- */
+- if (type == E820_RAM) {
+- if (start < 0x100000ULL && end > 0xA0000ULL) {
+- if (start < 0xA0000ULL)
+- add_memory_region(start, 0xA0000ULL-start, type);
+- if (end <= 0x100000ULL)
+- continue;
+- start = 0x100000ULL;
+- size = end - start;
+- }
+- }
+-#endif
+- add_memory_region(start, size, type);
+- } while (biosmap++,--nr_map);
+-
+-#ifdef CONFIG_XEN
+- if (is_initial_xendomain()) {
+- struct xen_memory_map memmap;
+-
+- memmap.nr_entries = E820MAX;
+- set_xen_guest_handle(memmap.buffer, machine_e820.map);
+-
+- if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
+- BUG();
+- machine_e820.nr_map = memmap.nr_entries;
+- } else
+- machine_e820 = e820;
+-#endif
+-
+- return 0;
+-}
+-
+ #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
+ struct edd edd;
+ #ifdef CONFIG_EDD_MODULE
+@@ -758,7 +192,7 @@ static inline void copy_edd(void)
+ }
+ #endif
+
+-static int __initdata user_defined_memmap = 0;
++int __initdata user_defined_memmap = 0;
+
+ /*
+ * "mem=nopentium" disables the 4MB page tables.
+@@ -795,51 +229,6 @@ static int __init parse_mem(char *arg)
+ }
+ early_param("mem", parse_mem);
+
+-static int __init parse_memmap(char *arg)
+-{
+- if (!arg)
+- return -EINVAL;
+-
+- if (strcmp(arg, "exactmap") == 0) {
+-#ifdef CONFIG_CRASH_DUMP
+- /* If we are doing a crash dump, we
+- * still need to know the real mem
+- * size before original memory map is
+- * reset.
+- */
+- find_max_pfn();
+- saved_max_pfn = max_pfn;
+-#endif
+- e820.nr_map = 0;
+- user_defined_memmap = 1;
+- } else {
+- /* If the user specifies memory size, we
+- * limit the BIOS-provided memory map to
+- * that size. exactmap can be used to specify
+- * the exact map. mem=number can be used to
+- * trim the existing memory map.
+- */
+- unsigned long long start_at, mem_size;
+-
+- mem_size = memparse(arg, &arg);
+- if (*arg == '@') {
+- start_at = memparse(arg+1, &arg);
+- add_memory_region(start_at, mem_size, E820_RAM);
+- } else if (*arg == '#') {
+- start_at = memparse(arg+1, &arg);
+- add_memory_region(start_at, mem_size, E820_ACPI);
+- } else if (*arg == '$') {
+- start_at = memparse(arg+1, &arg);
+- add_memory_region(start_at, mem_size, E820_RESERVED);
+- } else {
+- limit_regions(mem_size);
+- user_defined_memmap = 1;
+- }
+- }
+- return 0;
+-}
+-early_param("memmap", parse_memmap);
+-
+ #ifdef CONFIG_PROC_VMCORE
+ /* elfcorehdr= specifies the location of elf core header
+ * stored by the crashed kernel.
+@@ -906,127 +295,6 @@ early_param("reservetop", parse_reservet
+ #endif
+
+ /*
+- * Callback for efi_memory_walk.
+- */
+-static int __init
+-efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
+-{
+- unsigned long *max_pfn = arg, pfn;
+-
+- if (start < end) {
+- pfn = PFN_UP(end -1);
+- if (pfn > *max_pfn)
+- *max_pfn = pfn;
+- }
+- return 0;
+-}
+-
+-static int __init
+-efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
+-{
+- memory_present(0, PFN_UP(start), PFN_DOWN(end));
+- return 0;
+-}
+-
+-/*
+- * This function checks if any part of the range <start,end> is mapped
+- * with type.
+- */
+-int
+-e820_any_mapped(u64 start, u64 end, unsigned type)
+-{
+- int i;
+-
+-#ifndef CONFIG_XEN
+- for (i = 0; i < e820.nr_map; i++) {
+- const struct e820entry *ei = &e820.map[i];
+-#else
+- if (!is_initial_xendomain())
+- return 0;
+- for (i = 0; i < machine_e820.nr_map; ++i) {
+- const struct e820entry *ei = &machine_e820.map[i];
+-#endif
+-
+- if (type && ei->type != type)
+- continue;
+- if (ei->addr >= end || ei->addr + ei->size <= start)
+- continue;
+- return 1;
+- }
+- return 0;
+-}
+-EXPORT_SYMBOL_GPL(e820_any_mapped);
+-
+- /*
+- * This function checks if the entire range <start,end> is mapped with type.
+- *
+- * Note: this function only works correct if the e820 table is sorted and
+- * not-overlapping, which is the case
+- */
+-int __init
+-e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
+-{
+- u64 start = s;
+- u64 end = e;
+- int i;
+-
+-#ifndef CONFIG_XEN
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+-#else
+- if (!is_initial_xendomain())
+- return 0;
+- for (i = 0; i < machine_e820.nr_map; ++i) {
+- const struct e820entry *ei = &machine_e820.map[i];
+-#endif
+- if (type && ei->type != type)
+- continue;
+- /* is the region (part) in overlap with the current region ?*/
+- if (ei->addr >= end || ei->addr + ei->size <= start)
+- continue;
+- /* if the region is at the beginning of <start,end> we move
+- * start to the end of the region since it's ok until there
+- */
+- if (ei->addr <= start)
+- start = ei->addr + ei->size;
+- /* if start is now at or beyond end, we're done, full
+- * coverage */
+- if (start >= end)
+- return 1; /* we're done */
+- }
+- return 0;
+-}
+-
+-/*
+- * Find the highest page frame number we have available
+- */
+-void __init find_max_pfn(void)
+-{
+- int i;
+-
+- max_pfn = 0;
+- if (efi_enabled) {
+- efi_memmap_walk(efi_find_max_pfn, &max_pfn);
+- efi_memmap_walk(efi_memory_present_wrapper, NULL);
+- return;
+- }
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- unsigned long start, end;
+- /* RAM? */
+- if (e820.map[i].type != E820_RAM)
+- continue;
+- start = PFN_UP(e820.map[i].addr);
+- end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
+- if (start >= end)
+- continue;
+- if (end > max_pfn)
+- max_pfn = end;
+- memory_present(0, start, end);
+- }
+-}
+-
+-/*
+ * Determine low and high memory ranges:
+ */
+ unsigned long __init find_max_low_pfn(void)
+@@ -1085,77 +353,6 @@ unsigned long __init find_max_low_pfn(vo
+ return max_low_pfn;
+ }
+
+-/*
+- * Free all available memory for boot time allocation. Used
+- * as a callback function by efi_memory_walk()
+- */
+-
+-static int __init
+-free_available_memory(unsigned long start, unsigned long end, void *arg)
+-{
+- /* check max_low_pfn */
+- if (start >= (max_low_pfn << PAGE_SHIFT))
+- return 0;
+- if (end >= (max_low_pfn << PAGE_SHIFT))
+- end = max_low_pfn << PAGE_SHIFT;
+- if (start < end)
+- free_bootmem(start, end - start);
+-
+- return 0;
+-}
+-/*
+- * Register fully available low RAM pages with the bootmem allocator.
+- */
+-static void __init register_bootmem_low_pages(unsigned long max_low_pfn)
+-{
+- int i;
+-
+- if (efi_enabled) {
+- efi_memmap_walk(free_available_memory, NULL);
+- return;
+- }
+- for (i = 0; i < e820.nr_map; i++) {
+- unsigned long curr_pfn, last_pfn, size;
+- /*
+- * Reserve usable low memory
+- */
+- if (e820.map[i].type != E820_RAM)
+- continue;
+- /*
+- * We are rounding up the start address of usable memory:
+- */
+- curr_pfn = PFN_UP(e820.map[i].addr);
+- if (curr_pfn >= max_low_pfn)
+- continue;
+- /*
+- * ... and at the end of the usable range downwards:
+- */
+- last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
+-
+-#ifdef CONFIG_XEN
+- /*
+- * Truncate to the number of actual pages currently
+- * present.
+- */
+- if (last_pfn > xen_start_info->nr_pages)
+- last_pfn = xen_start_info->nr_pages;
+-#endif
+-
+- if (last_pfn > max_low_pfn)
+- last_pfn = max_low_pfn;
+-
+- /*
+- * .. finally, did all the rounding and playing
+- * around just make the area go away?
+- */
+- if (last_pfn <= curr_pfn)
+- continue;
+-
+- size = last_pfn - curr_pfn;
+- free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
+- }
+-}
+-
+ #ifndef CONFIG_XEN
+ /*
+ * workaround for Dell systems that neglect to reserve EBDA
+@@ -1245,8 +442,8 @@ void __init setup_bootmem_allocator(void
+ * the (very unlikely) case of us accidentally initializing the
+ * bootmem allocator with an invalid RAM area.
+ */
+- reserve_bootmem(__PHYSICAL_START, (PFN_PHYS(min_low_pfn) +
+- bootmap_size + PAGE_SIZE-1) - (__PHYSICAL_START));
++ reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
++ bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
+
+ #ifndef CONFIG_XEN
+ /*
+@@ -1328,160 +525,6 @@ void __init remapped_pgdat_init(void)
+ }
+ }
+
+-/*
+- * Request address space for all standard RAM and ROM resources
+- * and also for regions reported as reserved by the e820.
+- */
+-static void __init
+-legacy_init_iomem_resources(struct e820entry *e820, int nr_map,
+- struct resource *code_resource,
+- struct resource *data_resource)
+-{
+- int i;
+-
+- probe_roms();
+-
+- for (i = 0; i < nr_map; i++) {
+- struct resource *res;
+-#ifndef CONFIG_RESOURCES_64BIT
+- if (e820[i].addr + e820[i].size > 0x100000000ULL)
+- continue;
+-#endif
+- res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
+- switch (e820[i].type) {
+- case E820_RAM: res->name = "System RAM"; break;
+- case E820_ACPI: res->name = "ACPI Tables"; break;
+- case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
+- default: res->name = "reserved";
+- }
+- res->start = e820[i].addr;
+- res->end = res->start + e820[i].size - 1;
+- res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+- if (request_resource(&iomem_resource, res)) {
+- kfree(res);
+- continue;
+- }
+- if (e820[i].type == E820_RAM) {
+- /*
+- * We don't know which RAM region contains kernel data,
+- * so we try it repeatedly and let the resource manager
+- * test it.
+- */
+-#ifndef CONFIG_XEN
+- request_resource(res, code_resource);
+- request_resource(res, data_resource);
+-#endif
+-#ifdef CONFIG_KEXEC
+- if (crashk_res.start != crashk_res.end)
+- request_resource(res, &crashk_res);
+-#ifdef CONFIG_XEN
+- xen_machine_kexec_register_resources(res);
+-#endif
+-#endif
+- }
+- }
+-}
+-
+-/*
+- * Locate a unused range of the physical address space below 4G which
+- * can be used for PCI mappings.
+- */
+-static void __init
+-e820_setup_gap(struct e820entry *e820, int nr_map)
+-{
+- unsigned long gapstart, gapsize, round;
+- unsigned long long last;
+- int i;
+-
+- /*
+- * Search for the bigest gap in the low 32 bits of the e820
+- * memory space.
+- */
+- last = 0x100000000ull;
+- gapstart = 0x10000000;
+- gapsize = 0x400000;
+- i = nr_map;
+- while (--i >= 0) {
+- unsigned long long start = e820[i].addr;
+- unsigned long long end = start + e820[i].size;
+-
+- /*
+- * Since "last" is at most 4GB, we know we'll
+- * fit in 32 bits if this condition is true
+- */
+- if (last > end) {
+- unsigned long gap = last - end;
+-
+- if (gap > gapsize) {
+- gapsize = gap;
+- gapstart = end;
+- }
+- }
+- if (start < last)
+- last = start;
+- }
+-
+- /*
+- * See how much we want to round up: start off with
+- * rounding to the next 1MB area.
+- */
+- round = 0x100000;
+- while ((gapsize >> 4) > round)
+- round += round;
+- /* Fun with two's complement */
+- pci_mem_start = (gapstart + round) & -round;
+-
+- printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
+- pci_mem_start, gapstart, gapsize);
+-}
+-
+-/*
+- * Request address space for all standard resources
+- *
+- * This is called just before pcibios_init(), which is also a
+- * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
+- */
+-static int __init request_standard_resources(void)
+-{
+- int i;
+-
+- /* Nothing to do if not running in dom0. */
+- if (!is_initial_xendomain())
+- return 0;
+-
+- printk("Setting up standard PCI resources\n");
+-#ifdef CONFIG_XEN
+- legacy_init_iomem_resources(machine_e820.map, machine_e820.nr_map,
+- &code_resource, &data_resource);
+-#else
+- if (efi_enabled)
+- efi_initialize_iomem_resources(&code_resource, &data_resource);
+- else
+- legacy_init_iomem_resources(e820.map, e820.nr_map,
+- &code_resource, &data_resource);
+-#endif
+-
+- /* EFI systems may still have VGA */
+- request_resource(&iomem_resource, &video_ram_resource);
+-
+- /* request I/O space for devices used on all i[345]86 PCs */
+- for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+- request_resource(&ioport_resource, &standard_io_resources[i]);
+- return 0;
+-}
+-
+-subsys_initcall(request_standard_resources);
+-
+-static void __init register_memory(void)
+-{
+-#ifdef CONFIG_XEN
+- if (is_initial_xendomain())
+- e820_setup_gap(machine_e820.map, machine_e820.nr_map);
+- else
+-#endif
+- e820_setup_gap(e820.map, e820.nr_map);
+-}
+-
+ #ifdef CONFIG_MCA
+ static void set_mca_bus(int x)
+ {
+@@ -1491,6 +534,12 @@ static void set_mca_bus(int x)
+ static void set_mca_bus(int x) { }
+ #endif
+
++/* Overridden in paravirt.c if CONFIG_PARAVIRT */
++char * __init __attribute__((weak)) memory_setup(void)
++{
++ return machine_specific_memory_setup();
++}
++
+ /*
+ * Determine if we were loaded by an EFI loader. If so, then we have also been
+ * passed the efi memmap, systab, etc., so we should use these data structures
+@@ -1578,7 +627,7 @@ void __init setup_arch(char **cmdline_p)
+ efi_init();
+ else {
+ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+- print_memory_map(machine_specific_memory_setup());
++ print_memory_map(memory_setup());
+ }
+
+ copy_edd();
+@@ -1757,7 +806,7 @@ void __init setup_arch(char **cmdline_p)
+ get_smp_config();
+ #endif
+
+- register_memory();
++ e820_register_memory();
+
+ if (is_initial_xendomain()) {
+ #ifdef CONFIG_VT
+Index: head-2008-12-01/arch/x86/kernel/smp_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -659,6 +659,10 @@ int smp_call_function_single(int cpu, vo
+ put_cpu();
+ return -EBUSY;
+ }
++
++ /* Can deadlock when called with interrupts disabled */
++ WARN_ON(irqs_disabled());
++
+ spin_lock_bh(&call_lock);
+ __smp_call_function_single(cpu, func, info, nonatomic, wait);
+ spin_unlock_bh(&call_lock);
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -61,6 +61,7 @@
+ #include <asm/uaccess.h>
+ #include <asm/processor.h>
+ #include <asm/timer.h>
++#include <asm/time.h>
+ #include <asm/sections.h>
+
+ #include "mach_time.h"
+@@ -129,11 +130,11 @@ static DEFINE_PER_CPU(struct vcpu_runsta
+ /* Must be signed, as it's compared with s64 quantities which can be -ve. */
+ #define NS_PER_TICK (1000000000LL/HZ)
+
+-static void __clock_was_set(void *unused)
++static void __clock_was_set(struct work_struct *unused)
+ {
+ clock_was_set();
+ }
+-static DECLARE_WORK(clock_was_set_work, __clock_was_set, NULL);
++static DECLARE_WORK(clock_was_set_work, __clock_was_set);
+
+ /*
+ * GCC 4.3 can turn loops over an induction variable into division. We do
+@@ -544,10 +545,7 @@ static int set_rtc_mmss(unsigned long no
+ /* gets recalled with irq locally disabled */
+ /* XXX - does irqsave resolve this? -johnstul */
+ spin_lock_irqsave(&rtc_lock, flags);
+- if (efi_enabled)
+- retval = efi_set_rtc_mmss(nowtime);
+- else
+- retval = mach_set_rtc_mmss(nowtime);
++ retval = set_wallclock(nowtime);
+ spin_unlock_irqrestore(&rtc_lock, flags);
+
+ return retval;
+@@ -874,10 +872,7 @@ unsigned long get_cmos_time(void)
+
+ spin_lock_irqsave(&rtc_lock, flags);
+
+- if (efi_enabled)
+- retval = efi_get_time();
+- else
+- retval = mach_get_cmos_time();
++ retval = get_wallclock();
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+
+@@ -979,7 +974,7 @@ static void __init hpet_time_init(void)
+ printk("Using HPET for base-timer\n");
+ }
+
+- time_init_hook();
++ do_time_init();
+ }
+ #endif
+
+Index: head-2008-12-01/arch/x86/kernel/traps_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -29,6 +29,8 @@
+ #include <linux/kexec.h>
+ #include <linux/unwind.h>
+ #include <linux/uaccess.h>
++#include <linux/nmi.h>
++#include <linux/bug.h>
+
+ #ifdef CONFIG_EISA
+ #include <linux/ioport.h>
+@@ -61,9 +63,6 @@ int panic_on_unrecovered_nmi;
+
+ asmlinkage int system_call(void);
+
+-struct desc_struct default_ldt[] = { { 0, 0 }, { 0, 0 }, { 0, 0 },
+- { 0, 0 }, { 0, 0 } };
+-
+ /* Do we ignore FPU interrupts ? */
+ char ignore_fpu_irq = 0;
+
+@@ -100,12 +99,7 @@ asmlinkage void fixup_4gb_segment(void);
+ #endif
+ asmlinkage void machine_check(void);
+
+-static int kstack_depth_to_print = 24;
+-#ifdef CONFIG_STACK_UNWIND
+-static int call_trace = 1;
+-#else
+-#define call_trace (-1)
+-#endif
++int kstack_depth_to_print = 24;
+ ATOMIC_NOTIFIER_HEAD(i386die_chain);
+
+ int register_die_notifier(struct notifier_block *nb)
+@@ -159,25 +153,7 @@ static inline unsigned long print_contex
+ return ebp;
+ }
+
+-struct ops_and_data {
+- struct stacktrace_ops *ops;
+- void *data;
+-};
+-
+-static asmlinkage int
+-dump_trace_unwind(struct unwind_frame_info *info, void *data)
+-{
+- struct ops_and_data *oad = (struct ops_and_data *)data;
+- int n = 0;
+-
+- while (unwind(info) == 0 && UNW_PC(info)) {
+- n++;
+- oad->ops->address(oad->data, UNW_PC(info));
+- if (arch_unw_user_mode(info))
+- break;
+- }
+- return n;
+-}
++#define MSG(msg) ops->warning(data, msg)
+
+ void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack,
+@@ -188,39 +164,6 @@ void dump_trace(struct task_struct *task
+ if (!task)
+ task = current;
+
+- if (call_trace >= 0) {
+- int unw_ret = 0;
+- struct unwind_frame_info info;
+- struct ops_and_data oad = { .ops = ops, .data = data };
+-
+- if (regs) {
+- if (unwind_init_frame_info(&info, task, regs) == 0)
+- unw_ret = dump_trace_unwind(&info, &oad);
+- } else if (task == current)
+- unw_ret = unwind_init_running(&info, dump_trace_unwind, &oad);
+- else {
+- if (unwind_init_blocked(&info, task) == 0)
+- unw_ret = dump_trace_unwind(&info, &oad);
+- }
+- if (unw_ret > 0) {
+- if (call_trace == 1 && !arch_unw_user_mode(&info)) {
+- ops->warning_symbol(data, "DWARF2 unwinder stuck at %s\n",
+- UNW_PC(&info));
+- if (UNW_SP(&info) >= PAGE_OFFSET) {
+- ops->warning(data, "Leftover inexact backtrace:\n");
+- stack = (void *)UNW_SP(&info);
+- if (!stack)
+- return;
+- ebp = UNW_FP(&info);
+- } else
+- ops->warning(data, "Full inexact backtrace again:\n");
+- } else if (call_trace >= 1)
+- return;
+- else
+- ops->warning(data, "Full inexact backtrace again:\n");
+- } else
+- ops->warning(data, "Inexact backtrace:\n");
+- }
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+@@ -253,6 +196,7 @@ void dump_trace(struct task_struct *task
+ stack = (unsigned long*)context->previous_esp;
+ if (!stack)
+ break;
++ touch_nmi_watchdog();
+ }
+ }
+ EXPORT_SYMBOL(dump_trace);
+@@ -385,7 +329,7 @@ void show_registers(struct pt_regs *regs
+ * time of the fault..
+ */
+ if (in_kernel) {
+- u8 __user *eip;
++ u8 *eip;
+ int code_bytes = 64;
+ unsigned char c;
+
+@@ -394,18 +338,20 @@ void show_registers(struct pt_regs *regs
+
+ printk(KERN_EMERG "Code: ");
+
+- eip = (u8 __user *)regs->eip - 43;
+- if (eip < (u8 __user *)PAGE_OFFSET || __get_user(c, eip)) {
++ eip = (u8 *)regs->eip - 43;
++ if (eip < (u8 *)PAGE_OFFSET ||
++ probe_kernel_address(eip, c)) {
+ /* try starting at EIP */
+- eip = (u8 __user *)regs->eip;
++ eip = (u8 *)regs->eip;
+ code_bytes = 32;
+ }
+ for (i = 0; i < code_bytes; i++, eip++) {
+- if (eip < (u8 __user *)PAGE_OFFSET || __get_user(c, eip)) {
++ if (eip < (u8 *)PAGE_OFFSET ||
++ probe_kernel_address(eip, c)) {
+ printk(" Bad EIP value.");
+ break;
+ }
+- if (eip == (u8 __user *)regs->eip)
++ if (eip == (u8 *)regs->eip)
+ printk("<%02x> ", c);
+ else
+ printk("%02x ", c);
+@@ -414,43 +360,22 @@ void show_registers(struct pt_regs *regs
+ printk("\n");
+ }
+
+-static void handle_BUG(struct pt_regs *regs)
++int is_valid_bugaddr(unsigned long eip)
+ {
+- unsigned long eip = regs->eip;
+ unsigned short ud2;
+
+ if (eip < PAGE_OFFSET)
+- return;
+- if (probe_kernel_address((unsigned short __user *)eip, ud2))
+- return;
+- if (ud2 != 0x0b0f)
+- return;
++ return 0;
++ if (probe_kernel_address((unsigned short *)eip, ud2))
++ return 0;
+
+- printk(KERN_EMERG "------------[ cut here ]------------\n");
+-
+-#ifdef CONFIG_DEBUG_BUGVERBOSE
+- do {
+- unsigned short line;
+- char *file;
+- char c;
+-
+- if (probe_kernel_address((unsigned short __user *)(eip + 2),
+- line))
+- break;
+- if (__get_user(file, (char * __user *)(eip + 4)) ||
+- (unsigned long)file < PAGE_OFFSET || __get_user(c, file))
+- file = "<bad filename>";
+-
+- printk(KERN_EMERG "kernel BUG at %s:%d!\n", file, line);
+- return;
+- } while (0);
+-#endif
+- printk(KERN_EMERG "Kernel BUG at [verbose debug info unavailable]\n");
++ return ud2 == 0x0b0f;
+ }
+
+-/* This is gone through when something in the kernel
+- * has done something bad and is about to be terminated.
+-*/
++/*
++ * This is gone through when something in the kernel has done something bad and
++ * is about to be terminated.
++ */
+ void die(const char * str, struct pt_regs * regs, long err)
+ {
+ static struct {
+@@ -458,7 +383,7 @@ void die(const char * str, struct pt_reg
+ u32 lock_owner;
+ int lock_owner_depth;
+ } die = {
+- .lock = SPIN_LOCK_UNLOCKED,
++ .lock = __SPIN_LOCK_UNLOCKED(die.lock),
+ .lock_owner = -1,
+ .lock_owner_depth = 0
+ };
+@@ -482,7 +407,8 @@ void die(const char * str, struct pt_reg
+ unsigned long esp;
+ unsigned short ss;
+
+- handle_BUG(regs);
++ report_bug(regs->eip);
++
+ printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
+ #ifdef CONFIG_PREEMPT
+ printk(KERN_EMERG "PREEMPT ");
+@@ -682,8 +608,7 @@ mem_parity_error(unsigned char reason, s
+ {
+ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
+ "CPU %d.\n", reason, smp_processor_id());
+- printk(KERN_EMERG "You probably have a hardware problem with your RAM "
+- "chips\n");
++ printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
+ if (panic_on_unrecovered_nmi)
+ panic("NMI: Not continuing");
+
+@@ -741,7 +666,6 @@ void __kprobes die_nmi(struct pt_regs *r
+ printk(" on CPU%d, eip %08lx, registers:\n",
+ smp_processor_id(), regs->eip);
+ show_registers(regs);
+- printk(KERN_EMERG "console shuts up ...\n");
+ console_silent();
+ spin_unlock(&nmi_print_lock);
+ bust_spinlocks(0);
+@@ -1057,49 +981,24 @@ fastcall void do_spurious_interrupt_bug(
+ #endif
+ }
+
+-fastcall void setup_x86_bogus_stack(unsigned char * stk)
++fastcall unsigned long patch_espfix_desc(unsigned long uesp,
++ unsigned long kesp)
+ {
+- unsigned long *switch16_ptr, *switch32_ptr;
+- struct pt_regs *regs;
+- unsigned long stack_top, stack_bot;
+- unsigned short iret_frame16_off;
+- int cpu = smp_processor_id();
+- /* reserve the space on 32bit stack for the magic switch16 pointer */
+- memmove(stk, stk + 8, sizeof(struct pt_regs));
+- switch16_ptr = (unsigned long *)(stk + sizeof(struct pt_regs));
+- regs = (struct pt_regs *)stk;
+- /* now the switch32 on 16bit stack */
+- stack_bot = (unsigned long)&per_cpu(cpu_16bit_stack, cpu);
+- stack_top = stack_bot + CPU_16BIT_STACK_SIZE;
+- switch32_ptr = (unsigned long *)(stack_top - 8);
+- iret_frame16_off = CPU_16BIT_STACK_SIZE - 8 - 20;
+- /* copy iret frame on 16bit stack */
+- memcpy((void *)(stack_bot + iret_frame16_off), ®s->eip, 20);
+- /* fill in the switch pointers */
+- switch16_ptr[0] = (regs->esp & 0xffff0000) | iret_frame16_off;
+- switch16_ptr[1] = __ESPFIX_SS;
+- switch32_ptr[0] = (unsigned long)stk + sizeof(struct pt_regs) +
+- 8 - CPU_16BIT_STACK_SIZE;
+- switch32_ptr[1] = __KERNEL_DS;
+-}
+-
+-fastcall unsigned char * fixup_x86_bogus_stack(unsigned short sp)
+-{
+- unsigned long *switch32_ptr;
+- unsigned char *stack16, *stack32;
+- unsigned long stack_top, stack_bot;
+- int len;
+ int cpu = smp_processor_id();
+- stack_bot = (unsigned long)&per_cpu(cpu_16bit_stack, cpu);
+- stack_top = stack_bot + CPU_16BIT_STACK_SIZE;
+- switch32_ptr = (unsigned long *)(stack_top - 8);
+- /* copy the data from 16bit stack to 32bit stack */
+- len = CPU_16BIT_STACK_SIZE - 8 - sp;
+- stack16 = (unsigned char *)(stack_bot + sp);
+- stack32 = (unsigned char *)
+- (switch32_ptr[0] + CPU_16BIT_STACK_SIZE - 8 - len);
+- memcpy(stack32, stack16, len);
+- return stack32;
++ struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++ struct desc_struct *gdt = (struct desc_struct *)cpu_gdt_descr->address;
++ unsigned long base = (kesp - uesp) & -THREAD_SIZE;
++ unsigned long new_kesp = kesp - base;
++ unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT;
++ __u64 desc = *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS];
++ /* Set up base for espfix segment */
++ desc &= 0x00f0ff0000000000ULL;
++ desc |= ((((__u64)base) << 16) & 0x000000ffffff0000ULL) |
++ ((((__u64)base) << 32) & 0xff00000000000000ULL) |
++ ((((__u64)lim_pages) << 32) & 0x000f000000000000ULL) |
++ (lim_pages & 0xffff);
++ *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS] = desc;
++ return new_kesp;
+ }
+ #endif
+
+@@ -1113,7 +1012,7 @@ fastcall unsigned char * fixup_x86_bogus
+ * Must be called with kernel preemption disabled (in this case,
+ * local interrupts are disabled at the call-site in entry.S).
+ */
+-asmlinkage void math_state_restore(struct pt_regs regs)
++asmlinkage void math_state_restore(void)
+ {
+ struct thread_info *thread = current_thread_info();
+ struct task_struct *tsk = thread->task;
+@@ -1123,6 +1022,7 @@ asmlinkage void math_state_restore(struc
+ init_fpu(tsk);
+ restore_fpu(tsk);
+ thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
++ tsk->fpu_counter++;
+ }
+
+ #ifndef CONFIG_MATH_EMULATION
+@@ -1234,19 +1134,3 @@ static int __init kstack_setup(char *s)
+ return 1;
+ }
+ __setup("kstack=", kstack_setup);
+-
+-#ifdef CONFIG_STACK_UNWIND
+-static int __init call_trace_setup(char *s)
+-{
+- if (strcmp(s, "old") == 0)
+- call_trace = -1;
+- else if (strcmp(s, "both") == 0)
+- call_trace = 0;
+- else if (strcmp(s, "newfallback") == 0)
+- call_trace = 1;
+- else if (strcmp(s, "new") == 2)
+- call_trace = 2;
+- return 1;
+-}
+-__setup("call_trace=", call_trace_setup);
+-#endif
+Index: head-2008-12-01/arch/x86/kernel/vmlinux_32.lds.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/vmlinux_32.lds.S 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/vmlinux_32.lds.S 2008-12-01 11:32:38.000000000 +0100
+@@ -29,6 +29,12 @@ PHDRS {
+ SECTIONS
+ {
+ . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR;
++
++#if defined(CONFIG_XEN) && CONFIG_XEN_COMPAT <= 0x030002
++#undef LOAD_OFFSET
++#define LOAD_OFFSET 0
++#endif
++
+ phys_startup_32 = startup_32 - LOAD_OFFSET;
+
+ .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) {
+Index: head-2008-12-01/arch/x86/kvm/Kconfig
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kvm/Kconfig 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/kvm/Kconfig 2008-12-01 11:32:38.000000000 +0100
+@@ -7,6 +7,7 @@ config HAVE_KVM
+ menuconfig VIRTUALIZATION
+ bool "Virtualization"
+ depends on HAVE_KVM || X86
++ depends on !XEN
+ default y
+ ---help---
+ Say Y here to get to see options for using your Linux host to run other
+Index: head-2008-12-01/arch/x86/mm/fault_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -22,9 +22,9 @@
+ #include <linux/highmem.h>
+ #include <linux/module.h>
+ #include <linux/kprobes.h>
++#include <linux/uaccess.h>
+
+ #include <asm/system.h>
+-#include <asm/uaccess.h>
+ #include <asm/desc.h>
+ #include <asm/kdebug.h>
+ #include <asm/segment.h>
+@@ -167,7 +167,7 @@ static inline unsigned long get_segment_
+ static int __is_prefetch(struct pt_regs *regs, unsigned long addr)
+ {
+ unsigned long limit;
+- unsigned long instr = get_segment_eip (regs, &limit);
++ unsigned char *instr = (unsigned char *)get_segment_eip (regs, &limit);
+ int scan_more = 1;
+ int prefetch = 0;
+ int i;
+@@ -177,9 +177,9 @@ static int __is_prefetch(struct pt_regs
+ unsigned char instr_hi;
+ unsigned char instr_lo;
+
+- if (instr > limit)
++ if (instr > (unsigned char *)limit)
+ break;
+- if (__get_user(opcode, (unsigned char __user *) instr))
++ if (probe_kernel_address(instr, opcode))
+ break;
+
+ instr_hi = opcode & 0xf0;
+@@ -204,9 +204,9 @@ static int __is_prefetch(struct pt_regs
+ case 0x00:
+ /* Prefetch instruction is 0x0F0D or 0x0F18 */
+ scan_more = 0;
+- if (instr > limit)
++ if (instr > (unsigned char *)limit)
+ break;
+- if (__get_user(opcode, (unsigned char __user *) instr))
++ if (probe_kernel_address(instr, opcode))
+ break;
+ prefetch = (instr_lo == 0xF) &&
+ (opcode == 0x0D || opcode == 0x18);
+Index: head-2008-12-01/arch/x86/mm/highmem_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/highmem_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/highmem_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -32,7 +32,7 @@ static void *__kmap_atomic(struct page *
+ unsigned long vaddr;
+
+ /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
+- inc_preempt_count();
++ pagefault_disable();
+ if (!PageHighMem(page))
+ return page_address(page);
+
+@@ -63,26 +63,22 @@ void kunmap_atomic(void *kvaddr, enum km
+ unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
+ enum fixed_addresses idx = type + KM_TYPE_NR*smp_processor_id();
+
+-#ifdef CONFIG_DEBUG_HIGHMEM
+- if (vaddr >= PAGE_OFFSET && vaddr < (unsigned long)high_memory) {
+- dec_preempt_count();
+- preempt_check_resched();
+- return;
+- }
+-
+- if (vaddr != __fix_to_virt(FIX_KMAP_BEGIN+idx))
+- BUG();
+-#endif
+ /*
+ * Force other mappings to Oops if they'll try to access this pte
+ * without first remap it. Keeping stale mappings around is a bad idea
+ * also, in case the page changes cacheability attributes or becomes
+ * a protected page in a hypervisor.
+ */
+- kpte_clear_flush(kmap_pte-idx, vaddr);
++ if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx))
++ kpte_clear_flush(kmap_pte-idx, vaddr);
++ else {
++#ifdef CONFIG_DEBUG_HIGHMEM
++ BUG_ON(vaddr < PAGE_OFFSET);
++ BUG_ON(vaddr >= (unsigned long)high_memory);
++#endif
++ }
+
+- dec_preempt_count();
+- preempt_check_resched();
++ pagefault_enable();
+ }
+
+ /* This is the same as kmap_atomic() but can map memory that doesn't
+@@ -93,7 +89,7 @@ void *kmap_atomic_pfn(unsigned long pfn,
+ enum fixed_addresses idx;
+ unsigned long vaddr;
+
+- inc_preempt_count();
++ pagefault_disable();
+
+ idx = type + KM_TYPE_NR*smp_processor_id();
+ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
+Index: head-2008-12-01/arch/x86/mm/init_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -233,8 +233,6 @@ static inline int page_kills_ppro(unsign
+
+ #endif
+
+-extern int is_available_memory(efi_memory_desc_t *);
+-
+ int page_is_ram(unsigned long pagenr)
+ {
+ int i;
+@@ -327,7 +325,7 @@ void __init add_one_highpage_init(struct
+ SetPageReserved(page);
+ }
+
+-static int add_one_highpage_hotplug(struct page *page, unsigned long pfn)
++static int __meminit add_one_highpage_hotplug(struct page *page, unsigned long pfn)
+ {
+ free_new_highpage(page, pfn);
+ totalram_pages++;
+@@ -344,7 +342,7 @@ static int add_one_highpage_hotplug(stru
+ * has been added dynamically that would be
+ * onlined here is in HIGHMEM
+ */
+-void online_page(struct page *page)
++void __meminit online_page(struct page *page)
+ {
+ ClearPageReserved(page);
+ add_one_highpage_hotplug(page, page_to_pfn(page));
+@@ -732,16 +730,10 @@ void __init mem_init(void)
+ set_bit(PG_pinned, &virt_to_page(init_mm.pgd)->flags);
+ }
+
+-/*
+- * this is for the non-NUMA, single node SMP system case.
+- * Specifically, in the case of x86, we will always add
+- * memory to the highmem for now.
+- */
+ #ifdef CONFIG_MEMORY_HOTPLUG
+-#ifndef CONFIG_NEED_MULTIPLE_NODES
+ int arch_add_memory(int nid, u64 start, u64 size)
+ {
+- struct pglist_data *pgdata = &contig_page_data;
++ struct pglist_data *pgdata = NODE_DATA(nid);
+ struct zone *zone = pgdata->node_zones + ZONE_HIGHMEM;
+ unsigned long start_pfn = start >> PAGE_SHIFT;
+ unsigned long nr_pages = size >> PAGE_SHIFT;
+@@ -753,11 +745,11 @@ int remove_memory(u64 start, u64 size)
+ {
+ return -EINVAL;
+ }
+-#endif
++EXPORT_SYMBOL_GPL(remove_memory);
+ #endif
+
+-kmem_cache_t *pgd_cache;
+-kmem_cache_t *pmd_cache;
++struct kmem_cache *pgd_cache;
++struct kmem_cache *pmd_cache;
+
+ void __init pgtable_cache_init(void)
+ {
+Index: head-2008-12-01/arch/x86/mm/pgtable_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -203,7 +203,7 @@ void pte_free(struct page *pte)
+ __free_page(pte);
+ }
+
+-void pmd_ctor(void *pmd, kmem_cache_t *cache, unsigned long flags)
++void pmd_ctor(void *pmd, struct kmem_cache *cache, unsigned long flags)
+ {
+ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
+ }
+@@ -243,7 +243,7 @@ static inline void pgd_list_del(pgd_t *p
+ set_page_private(next, (unsigned long)pprev);
+ }
+
+-void pgd_ctor(void *pgd, kmem_cache_t *cache, unsigned long unused)
++void pgd_ctor(void *pgd, struct kmem_cache *cache, unsigned long unused)
+ {
+ unsigned long flags;
+
+@@ -264,7 +264,7 @@ void pgd_ctor(void *pgd, kmem_cache_t *c
+ }
+
+ /* never called when PTRS_PER_PMD > 1 */
+-void pgd_dtor(void *pgd, kmem_cache_t *cache, unsigned long unused)
++void pgd_dtor(void *pgd, struct kmem_cache *cache, unsigned long unused)
+ {
+ unsigned long flags; /* can be called from interrupt context */
+
+Index: head-2008-12-01/arch/x86/pci/irq-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/pci/irq-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/pci/irq-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -768,7 +768,7 @@ static void __init pirq_find_router(stru
+ DBG(KERN_DEBUG "PCI: Attempting to find IRQ router for %04x:%04x\n",
+ rt->rtr_vendor, rt->rtr_device);
+
+- pirq_router_dev = pci_find_slot(rt->rtr_bus, rt->rtr_devfn);
++ pirq_router_dev = pci_get_bus_and_slot(rt->rtr_bus, rt->rtr_devfn);
+ if (!pirq_router_dev) {
+ DBG(KERN_DEBUG "PCI: Interrupt router not found at "
+ "%02x:%02x\n", rt->rtr_bus, rt->rtr_devfn);
+@@ -788,6 +788,8 @@ static void __init pirq_find_router(stru
+ pirq_router_dev->vendor,
+ pirq_router_dev->device,
+ pci_name(pirq_router_dev));
++
++ /* The device remains referenced for the kernel lifetime */
+ }
+
+ static struct irq_info *pirq_get_info(struct pci_dev *dev)
+Index: head-2008-12-01/arch/x86/kernel/entry_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:32:38.000000000 +0100
+@@ -261,7 +261,6 @@ ENTRY(system_call)
+ movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
+ GET_THREAD_INFO(%rcx)
+ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%rcx)
+- CFI_REMEMBER_STATE
+ jnz tracesys
+ cmpq $__NR_syscall_max,%rax
+ ja badsys
+@@ -272,7 +271,6 @@ ENTRY(system_call)
+ * Syscall return path ending with SYSRET (fast path)
+ * Has incomplete stack frame and undefined top of stack.
+ */
+- .globl ret_from_sys_call
+ ret_from_sys_call:
+ movl $_TIF_ALLWORK_MASK,%edi
+ /* edi: flagmask */
+@@ -282,8 +280,8 @@ sysret_check:
+ TRACE_IRQS_OFF
+ movl threadinfo_flags(%rcx),%edx
+ andl %edi,%edx
+- CFI_REMEMBER_STATE
+ jnz sysret_careful
++ CFI_REMEMBER_STATE
+ /*
+ * sysretq will re-enable interrupts:
+ */
+@@ -292,10 +290,10 @@ sysret_check:
+ RESTORE_ARGS 0,8,0
+ HYPERVISOR_IRET VGCF_IN_SYSCALL
+
++ CFI_RESTORE_STATE
+ /* Handle reschedules */
+ /* edx: work, edi: workmask */
+ sysret_careful:
+- CFI_RESTORE_STATE
+ bt $TIF_NEED_RESCHED,%edx
+ jnc sysret_signal
+ TRACE_IRQS_ON
+@@ -334,7 +332,6 @@ badsys:
+
+ /* Do syscall tracing */
+ tracesys:
+- CFI_RESTORE_STATE
+ SAVE_REST
+ movq $-ENOSYS,RAX(%rsp)
+ FIXUP_TOP_OF_STACK %rdi
+@@ -350,32 +347,13 @@ tracesys:
+ call *sys_call_table(,%rax,8)
+ 1: movq %rax,RAX-ARGOFFSET(%rsp)
+ /* Use IRET because user could have changed frame */
+- jmp int_ret_from_sys_call
+- CFI_ENDPROC
+-END(system_call)
+
+ /*
+ * Syscall return path ending with IRET.
+ * Has correct top of stack, but partial stack frame.
+- */
+-ENTRY(int_ret_from_sys_call)
+- CFI_STARTPROC simple
+- CFI_SIGNAL_FRAME
+- CFI_DEF_CFA rsp,SS+8-ARGOFFSET
+- /*CFI_REL_OFFSET ss,SS-ARGOFFSET*/
+- CFI_REL_OFFSET rsp,RSP-ARGOFFSET
+- /*CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
+- /*CFI_REL_OFFSET cs,CS-ARGOFFSET*/
+- CFI_REL_OFFSET rip,RIP-ARGOFFSET
+- CFI_REL_OFFSET rdx,RDX-ARGOFFSET
+- CFI_REL_OFFSET rcx,RCX-ARGOFFSET
+- CFI_REL_OFFSET rax,RAX-ARGOFFSET
+- CFI_REL_OFFSET rdi,RDI-ARGOFFSET
+- CFI_REL_OFFSET rsi,RSI-ARGOFFSET
+- CFI_REL_OFFSET r8,R8-ARGOFFSET
+- CFI_REL_OFFSET r9,R9-ARGOFFSET
+- CFI_REL_OFFSET r10,R10-ARGOFFSET
+- CFI_REL_OFFSET r11,R11-ARGOFFSET
++ */
++ .globl int_ret_from_sys_call
++int_ret_from_sys_call:
+ XEN_BLOCK_EVENTS(%rsi)
+ TRACE_IRQS_OFF
+ testb $3,CS-ARGOFFSET(%rsp)
+@@ -428,8 +406,6 @@ int_very_careful:
+ popq %rdi
+ CFI_ADJUST_CFA_OFFSET -8
+ andl $~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edi
+- XEN_BLOCK_EVENTS(%rsi)
+- TRACE_IRQS_OFF
+ jmp int_restore_rest
+
+ int_signal:
+@@ -445,7 +421,7 @@ int_restore_rest:
+ TRACE_IRQS_OFF
+ jmp int_with_check
+ CFI_ENDPROC
+-END(int_ret_from_sys_call)
++END(system_call)
+
+ /*
+ * Certain special system calls that need to save a complete full stack frame.
+@@ -1275,36 +1251,3 @@ ENTRY(call_softirq)
+ ret
+ CFI_ENDPROC
+ ENDPROC(call_softirq)
+-
+-#ifdef CONFIG_STACK_UNWIND
+-ENTRY(arch_unwind_init_running)
+- CFI_STARTPROC
+- movq %r15, R15(%rdi)
+- movq %r14, R14(%rdi)
+- xchgq %rsi, %rdx
+- movq %r13, R13(%rdi)
+- movq %r12, R12(%rdi)
+- xorl %eax, %eax
+- movq %rbp, RBP(%rdi)
+- movq %rbx, RBX(%rdi)
+- movq (%rsp), %rcx
+- movq %rax, R11(%rdi)
+- movq %rax, R10(%rdi)
+- movq %rax, R9(%rdi)
+- movq %rax, R8(%rdi)
+- movq %rax, RAX(%rdi)
+- movq %rax, RCX(%rdi)
+- movq %rax, RDX(%rdi)
+- movq %rax, RSI(%rdi)
+- movq %rax, RDI(%rdi)
+- movq %rax, ORIG_RAX(%rdi)
+- movq %rcx, RIP(%rdi)
+- leaq 8(%rsp), %rcx
+- movq $__KERNEL_CS, CS(%rdi)
+- movq %rax, EFLAGS(%rdi)
+- movq %rcx, RSP(%rdi)
+- movq $__KERNEL_DS, SS(%rdi)
+- jmpq *%rdx
+- CFI_ENDPROC
+-ENDPROC(arch_unwind_init_running)
+-#endif
+Index: head-2008-12-01/arch/x86/kernel/genapic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/genapic_64-xen.c 2007-06-12 13:13:01.000000000 +0200
++++ head-2008-12-01/arch/x86/kernel/genapic_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -34,6 +34,7 @@ extern struct genapic apic_physflat;
+
+ #ifndef CONFIG_XEN
+ struct genapic *genapic = &apic_flat;
++struct genapic *genapic_force;
+ #else
+ extern struct genapic apic_xen;
+ struct genapic *genapic = &apic_xen;
+@@ -52,6 +53,13 @@ void __init clustered_apic_check(void)
+ u8 cluster_cnt[NUM_APIC_CLUSTERS];
+ int max_apic = 0;
+
++ /* genapic selection can be forced because of certain quirks.
++ */
++ if (genapic_force) {
++ genapic = genapic_force;
++ goto print;
++ }
++
+ #if defined(CONFIG_ACPI)
+ /*
+ * Some x86_64 machines use physical APIC mode regardless of how many
+Index: head-2008-12-01/arch/x86/kernel/head64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -104,7 +104,10 @@ void __init x86_64_start_kernel(char * r
+ machine_to_phys_order++;
+
+ #if 0
+- for (i = 0; i < 256; i++)
++ /* clear bss before set_intr_gate with early_idt_handler */
++ clear_bss();
++
++ for (i = 0; i < IDT_ENTRIES; i++)
+ set_intr_gate(i, early_idt_handler);
+ asm volatile("lidt %0" :: "m" (idt_descr));
+ #endif
+Index: head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -202,14 +202,20 @@ static struct IO_APIC_route_entry ioapic
+ * the interrupt, and we need to make sure the entry is fully populated
+ * before that happens.
+ */
+-static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
++static void
++__ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
+ {
+- unsigned long flags;
+ union entry_union eu;
+ eu.entry = e;
+- spin_lock_irqsave(&ioapic_lock, flags);
+ io_apic_write(apic, 0x11 + 2*pin, eu.w2);
+ io_apic_write(apic, 0x10 + 2*pin, eu.w1);
++}
++
++static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
++{
++ unsigned long flags;
++ spin_lock_irqsave(&ioapic_lock, flags);
++ __ioapic_write_entry(apic, pin, e);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+
+@@ -720,6 +726,22 @@ static int assign_irq_vector(int irq, cp
+ }
+
+ #ifndef CONFIG_XEN
++static void __clear_irq_vector(int irq)
++{
++ cpumask_t mask;
++ int cpu, vector;
++
++ BUG_ON(!irq_vector[irq]);
++
++ vector = irq_vector[irq];
++ cpus_and(mask, irq_domain[irq], cpu_online_map);
++ for_each_cpu_mask(cpu, mask)
++ per_cpu(vector_irq, cpu)[vector] = -1;
++
++ irq_vector[irq] = 0;
++ irq_domain[irq] = CPU_MASK_NONE;
++}
++
+ void __setup_vector_irq(int cpu)
+ {
+ /* Initialize vector_irq on a new cpu */
+@@ -767,26 +789,65 @@ static void ioapic_register_intr(int irq
+ #define ioapic_register_intr(irq, vector, trigger) evtchn_register_pirq(irq)
+ #endif /* !CONFIG_XEN */
+
+-static void __init setup_IO_APIC_irqs(void)
++static void __init setup_IO_APIC_irq(int apic, int pin, int idx, int irq)
+ {
+ struct IO_APIC_route_entry entry;
+- int apic, pin, idx, irq, first_notcon = 1, vector;
++ int vector;
+ unsigned long flags;
+
+- apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
+
+- for (apic = 0; apic < nr_ioapics; apic++) {
+- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
++ /*
++ * add it to the IO-APIC irq-routing table:
++ */
++ memset(&entry,0,sizeof(entry));
+
+- /*
+- * add it to the IO-APIC irq-routing table:
+- */
+- memset(&entry,0,sizeof(entry));
++ entry.delivery_mode = INT_DELIVERY_MODE;
++ entry.dest_mode = INT_DEST_MODE;
++ entry.mask = 0; /* enable IRQ */
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
+
+- entry.delivery_mode = INT_DELIVERY_MODE;
+- entry.dest_mode = INT_DEST_MODE;
+- entry.mask = 0; /* enable IRQ */
++ entry.trigger = irq_trigger(idx);
++ entry.polarity = irq_polarity(idx);
++
++ if (irq_trigger(idx)) {
++ entry.trigger = 1;
++ entry.mask = 1;
+ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++ }
++
++ if (/* !apic && */ !IO_APIC_IRQ(irq))
++ return;
++
++ if (IO_APIC_IRQ(irq)) {
++ cpumask_t mask;
++ vector = assign_irq_vector(irq, TARGET_CPUS, &mask);
++ if (vector < 0)
++ return;
++
++ entry.dest.logical.logical_dest = cpu_mask_to_apicid(mask);
++ entry.vector = vector;
++
++ ioapic_register_intr(irq, vector, IOAPIC_AUTO);
++ if (!apic && (irq < 16))
++ disable_8259A_irq(irq);
++ }
++
++ ioapic_write_entry(apic, pin, entry);
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ set_native_irq_info(irq, TARGET_CPUS);
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++
++}
++
++static void __init setup_IO_APIC_irqs(void)
++{
++ int apic, pin, idx, irq, first_notcon = 1;
++
++ apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
++
++ for (apic = 0; apic < nr_ioapics; apic++) {
++ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+
+ idx = find_irq_entry(apic,pin,mp_INT);
+ if (idx == -1) {
+@@ -798,39 +859,11 @@ static void __init setup_IO_APIC_irqs(vo
+ continue;
+ }
+
+- entry.trigger = irq_trigger(idx);
+- entry.polarity = irq_polarity(idx);
+-
+- if (irq_trigger(idx)) {
+- entry.trigger = 1;
+- entry.mask = 1;
+- entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
+- }
+-
+ irq = pin_2_irq(idx, apic, pin);
+ add_pin_to_irq(irq, apic, pin);
+
+- if (/* !apic && */ !IO_APIC_IRQ(irq))
+- continue;
+-
+- if (IO_APIC_IRQ(irq)) {
+- cpumask_t mask;
+- vector = assign_irq_vector(irq, TARGET_CPUS, &mask);
+- if (vector < 0)
+- continue;
+-
+- entry.dest.logical.logical_dest = cpu_mask_to_apicid(mask);
+- entry.vector = vector;
++ setup_IO_APIC_irq(apic, pin, idx, irq);
+
+- ioapic_register_intr(irq, vector, IOAPIC_AUTO);
+- if (!apic && (irq < 16))
+- disable_8259A_irq(irq);
+- }
+- ioapic_write_entry(apic, pin, entry);
+-
+- spin_lock_irqsave(&ioapic_lock, flags);
+- set_native_irq_info(irq, TARGET_CPUS);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+ }
+
+@@ -1826,7 +1859,7 @@ void destroy_irq(unsigned int irq)
+ dynamic_irq_cleanup(irq);
+
+ spin_lock_irqsave(&vector_lock, flags);
+- irq_vector[irq] = 0;
++ __clear_irq_vector(irq);
+ spin_unlock_irqrestore(&vector_lock, flags);
+ }
+
+@@ -2131,7 +2164,15 @@ void __init setup_ioapic_dest(void)
+ if (irq_entry == -1)
+ continue;
+ irq = pin_2_irq(irq_entry, ioapic, pin);
+- set_ioapic_affinity_irq(irq, TARGET_CPUS);
++
++ /* setup_IO_APIC_irqs could fail to get vector for some device
++ * when you have too many devices, because at that time only boot
++ * cpu is online.
++ */
++ if(!irq_vector[irq])
++ setup_IO_APIC_irq(ioapic, pin, irq_entry, irq);
++ else
++ set_ioapic_affinity_irq(irq, TARGET_CPUS);
+ }
+
+ }
+Index: head-2008-12-01/arch/x86/kernel/irq_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -120,7 +120,7 @@ asmlinkage unsigned int do_IRQ(struct pt
+
+ if (likely(irq < NR_IRQS))
+ generic_handle_irq(irq);
+- else
++ else if (printk_ratelimit())
+ printk(KERN_EMERG "%s: %d.%d No irq handler for irq\n",
+ __func__, smp_processor_id(), irq);
+
+Index: head-2008-12-01/arch/x86/kernel/mpparse_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/mpparse_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/mpparse_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -35,8 +35,6 @@
+ int smp_found_config;
+ unsigned int __initdata maxcpus = NR_CPUS;
+
+-int acpi_found_madt;
+-
+ /*
+ * Various Linux-internal data structures created from the
+ * MP-table.
+Index: head-2008-12-01/arch/x86/kernel/process_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -119,29 +119,23 @@ void exit_idle(void)
+ static void poll_idle (void)
+ {
+ local_irq_enable();
+-
+- asm volatile(
+- "2:"
+- "testl %0,%1;"
+- "rep; nop;"
+- "je 2b;"
+- : :
+- "i" (_TIF_NEED_RESCHED),
+- "m" (current_thread_info()->flags));
++ cpu_relax();
+ }
+
+ static void xen_idle(void)
+ {
++ current_thread_info()->status &= ~TS_POLLING;
++ /*
++ * TS_POLLING-cleared state must be visible before we
++ * test NEED_RESCHED:
++ */
++ smp_mb();
+ local_irq_disable();
+-
+- if (need_resched())
+- local_irq_enable();
+- else {
+- current_thread_info()->status &= ~TS_POLLING;
+- smp_mb__after_clear_bit();
++ if (!need_resched())
+ safe_halt();
+- current_thread_info()->status |= TS_POLLING;
+- }
++ else
++ local_irq_enable();
++ current_thread_info()->status |= TS_POLLING;
+ }
+
+ #ifdef CONFIG_HOTPLUG_CPU
+@@ -181,6 +175,12 @@ void cpu_idle (void)
+ idle = xen_idle; /* no alternatives */
+ if (cpu_is_offline(smp_processor_id()))
+ play_dead();
++ /*
++ * Idle routines should keep interrupts disabled
++ * from here on, until they go to idle.
++ * Otherwise, idle callbacks can misfire.
++ */
++ local_irq_disable();
+ enter_idle();
+ idle();
+ /* In many cases the interrupt that ended idle
+Index: head-2008-12-01/arch/x86/kernel/setup_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -573,8 +573,7 @@ void __init setup_arch(char **cmdline_p)
+ if (LOADER_TYPE && INITRD_START) {
+ if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
+ reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
+- initrd_start =
+- INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
++ initrd_start = INITRD_START + PAGE_OFFSET;
+ initrd_end = initrd_start+INITRD_SIZE;
+ }
+ else {
+@@ -990,11 +989,8 @@ static void __cpuinit init_amd(struct cp
+ /* Fix cpuid4 emulation for more */
+ num_cache_leaves = 3;
+
+- /* When there is only one core no need to synchronize RDTSC */
+- if (num_possible_cpus() == 1)
+- set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
+- else
+- clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
++ /* RDTSC can be speculated around */
++ clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
+ }
+
+ static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
+@@ -1093,6 +1089,15 @@ static void __cpuinit init_intel(struct
+ set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
+ }
+
++ if (cpu_has_ds) {
++ unsigned int l1, l2;
++ rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
++ if (!(l1 & (1<<11)))
++ set_bit(X86_FEATURE_BTS, c->x86_capability);
++ if (!(l1 & (1<<12)))
++ set_bit(X86_FEATURE_PEBS, c->x86_capability);
++ }
++
+ n = c->extended_cpuid_level;
+ if (n >= 0x80000008) {
+ unsigned eax = cpuid_eax(0x80000008);
+@@ -1112,7 +1117,10 @@ static void __cpuinit init_intel(struct
+ set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
+ if (c->x86 == 6)
+ set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
+- set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
++ if (c->x86 == 15)
++ set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
++ else
++ clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
+ c->x86_max_cores = intel_num_cpu_cores(c);
+
+ srat_detect_node();
+Index: head-2008-12-01/arch/x86/kernel/smp_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -384,12 +384,17 @@ int smp_call_function_single (int cpu, v
+ put_cpu();
+ return 0;
+ }
++
++ /* Can deadlock when called with interrupts disabled */
++ WARN_ON(irqs_disabled());
++
+ spin_lock_bh(&call_lock);
+ __smp_call_function_single(cpu, func, info, nonatomic, wait);
+ spin_unlock_bh(&call_lock);
+ put_cpu();
+ return 0;
+ }
++EXPORT_SYMBOL(smp_call_function_single);
+
+ /*
+ * this function sends a 'generic call function' IPI to all other CPUs
+Index: head-2008-12-01/arch/x86/kernel/traps_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -30,9 +30,10 @@
+ #include <linux/kprobes.h>
+ #include <linux/kexec.h>
+ #include <linux/unwind.h>
++#include <linux/uaccess.h>
++#include <linux/bug.h>
+
+ #include <asm/system.h>
+-#include <asm/uaccess.h>
+ #include <asm/io.h>
+ #include <asm/atomic.h>
+ #include <asm/debugreg.h>
+@@ -108,12 +109,7 @@ static inline void preempt_conditional_c
+ preempt_enable_no_resched();
+ }
+
+-static int kstack_depth_to_print = 12;
+-#ifdef CONFIG_STACK_UNWIND
+-static int call_trace = 1;
+-#else
+-#define call_trace (-1)
+-#endif
++int kstack_depth_to_print = 12;
+
+ #ifdef CONFIG_KALLSYMS
+ void printk_address(unsigned long address)
+@@ -218,24 +214,7 @@ static unsigned long *in_exception_stack
+ return NULL;
+ }
+
+-struct ops_and_data {
+- struct stacktrace_ops *ops;
+- void *data;
+-};
+-
+-static int dump_trace_unwind(struct unwind_frame_info *info, void *context)
+-{
+- struct ops_and_data *oad = (struct ops_and_data *)context;
+- int n = 0;
+-
+- while (unwind(info) == 0 && UNW_PC(info)) {
+- n++;
+- oad->ops->address(oad->data, UNW_PC(info));
+- if (arch_unw_user_mode(info))
+- break;
+- }
+- return n;
+-}
++#define MSG(txt) ops->warning(data, txt)
+
+ /*
+ * x86-64 can have upto three kernel stacks:
+@@ -250,61 +229,24 @@ static inline int valid_stack_ptr(struct
+ return p > t && p < t + THREAD_SIZE - 3;
+ }
+
+-void dump_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long * stack,
++void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
++ unsigned long *stack,
+ struct stacktrace_ops *ops, void *data)
+ {
+- const unsigned cpu = smp_processor_id();
+- unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
++ const unsigned cpu = get_cpu();
++ unsigned long *irqstack_end = (unsigned long*)cpu_pda(cpu)->irqstackptr;
+ unsigned used = 0;
+ struct thread_info *tinfo;
+
+ if (!tsk)
+ tsk = current;
+
+- if (call_trace >= 0) {
+- int unw_ret = 0;
+- struct unwind_frame_info info;
+- struct ops_and_data oad = { .ops = ops, .data = data };
+-
+- if (regs) {
+- if (unwind_init_frame_info(&info, tsk, regs) == 0)
+- unw_ret = dump_trace_unwind(&info, &oad);
+- } else if (tsk == current)
+- unw_ret = unwind_init_running(&info, dump_trace_unwind, &oad);
+- else {
+- if (unwind_init_blocked(&info, tsk) == 0)
+- unw_ret = dump_trace_unwind(&info, &oad);
+- }
+- if (unw_ret > 0) {
+- if (call_trace == 1 && !arch_unw_user_mode(&info)) {
+- ops->warning_symbol(data, "DWARF2 unwinder stuck at %s\n",
+- UNW_PC(&info));
+- if ((long)UNW_SP(&info) < 0) {
+- ops->warning(data, "Leftover inexact backtrace:\n");
+- stack = (unsigned long *)UNW_SP(&info);
+- if (!stack)
+- return;
+- } else
+- ops->warning(data, "Full inexact backtrace again:\n");
+- } else if (call_trace >= 1)
+- return;
+- else
+- ops->warning(data, "Full inexact backtrace again:\n");
+- } else
+- ops->warning(data, "Inexact backtrace:\n");
+- }
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+ if (tsk && tsk != current)
+ stack = (unsigned long *)tsk->thread.rsp;
+ }
+- /*
+- * Align the stack pointer on word boundary, later loops
+- * rely on that (and corruption / debug info bugs can cause
+- * unaligned values here):
+- */
+- stack = (unsigned long *)((unsigned long)stack & ~(sizeof(long)-1));
+
+ /*
+ * Print function call entries within a stack. 'cond' is the
+@@ -314,9 +256,9 @@ void dump_trace(struct task_struct *tsk,
+ #define HANDLE_STACK(cond) \
+ do while (cond) { \
+ unsigned long addr = *stack++; \
+- if (oops_in_progress ? \
+- __kernel_text_address(addr) : \
+- kernel_text_address(addr)) { \
++ /* Use unlocked access here because except for NMIs \
++ we should be already protected against module unloads */ \
++ if (__kernel_text_address(addr)) { \
+ /* \
+ * If the address is either in the text segment of the \
+ * kernel, or in the region which contains vmalloc'ed \
+@@ -379,9 +321,10 @@ void dump_trace(struct task_struct *tsk,
+ /*
+ * This handles the process stack:
+ */
+- tinfo = current_thread_info();
++ tinfo = task_thread_info(tsk);
+ HANDLE_STACK (valid_stack_ptr(tinfo, stack));
+ #undef HANDLE_STACK
++ put_cpu();
+ }
+ EXPORT_SYMBOL(dump_trace);
+
+@@ -518,30 +461,15 @@ bad:
+ printk("\n");
+ }
+
+-void handle_BUG(struct pt_regs *regs)
+-{
+- struct bug_frame f;
+- long len;
+- const char *prefix = "";
++int is_valid_bugaddr(unsigned long rip)
++{
++ unsigned short ud2;
+
+- if (user_mode(regs))
+- return;
+- if (__copy_from_user(&f, (const void __user *) regs->rip,
+- sizeof(struct bug_frame)))
+- return;
+- if (f.filename >= 0 ||
+- f.ud2[0] != 0x0f || f.ud2[1] != 0x0b)
+- return;
+- len = __strnlen_user((char *)(long)f.filename, PATH_MAX) - 1;
+- if (len < 0 || len >= PATH_MAX)
+- f.filename = (int)(long)"unmapped filename";
+- else if (len > 50) {
+- f.filename += len - 50;
+- prefix = "...";
+- }
+- printk("----------- [cut here ] --------- [please bite here ] ---------\n");
+- printk(KERN_ALERT "Kernel BUG at %s%.50s:%d\n", prefix, (char *)(long)f.filename, f.line);
+-}
++ if (__copy_from_user(&ud2, (const void __user *) rip, sizeof(ud2)))
++ return 0;
++
++ return ud2 == 0x0b0f;
++}
+
+ #ifdef CONFIG_BUG
+ void out_of_line_bug(void)
+@@ -621,7 +549,9 @@ void die(const char * str, struct pt_reg
+ {
+ unsigned long flags = oops_begin();
+
+- handle_BUG(regs);
++ if (!user_mode(regs))
++ report_bug(regs->rip);
++
+ __die(str, regs, err);
+ oops_end(flags);
+ do_exit(SIGSEGV);
+@@ -790,8 +720,7 @@ mem_parity_error(unsigned char reason, s
+ {
+ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
+ reason);
+- printk(KERN_EMERG "You probably have a hardware problem with your "
+- "RAM chips\n");
++ printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
+
+ if (panic_on_unrecovered_nmi)
+ panic("NMI: Not continuing");
+@@ -1227,21 +1156,3 @@ static int __init kstack_setup(char *s)
+ return 0;
+ }
+ early_param("kstack", kstack_setup);
+-
+-#ifdef CONFIG_STACK_UNWIND
+-static int __init call_trace_setup(char *s)
+-{
+- if (!s)
+- return -EINVAL;
+- if (strcmp(s, "old") == 0)
+- call_trace = -1;
+- else if (strcmp(s, "both") == 0)
+- call_trace = 0;
+- else if (strcmp(s, "newfallback") == 0)
+- call_trace = 1;
+- else if (strcmp(s, "new") == 0)
+- call_trace = 2;
+- return 0;
+-}
+-early_param("call_trace", call_trace_setup);
+-#endif
+Index: head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -42,6 +42,7 @@
+ #include <asm/topology.h>
+
+ #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
++#define __syscall_clobber "r11","rcx","memory"
+
+ int __sysctl_vsyscall __section_sysctl_vsyscall = 1;
+ seqlock_t __xtime_lock __section_xtime_lock = SEQLOCK_UNLOCKED;
+@@ -224,8 +225,7 @@ out:
+
+ static int vsyscall_sysctl_nostrat(ctl_table *t, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+- void __user *newval, size_t newlen,
+- void **context)
++ void __user *newval, size_t newlen)
+ {
+ return -ENOSYS;
+ }
+@@ -277,7 +277,6 @@ static void __cpuinit cpu_vsyscall_init(
+ vsyscall_set_cpu(raw_smp_processor_id());
+ }
+
+-#ifdef CONFIG_HOTPLUG_CPU
+ static int __cpuinit
+ cpu_vsyscall_notifier(struct notifier_block *n, unsigned long action, void *arg)
+ {
+@@ -286,13 +285,13 @@ cpu_vsyscall_notifier(struct notifier_bl
+ smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 0, 1);
+ return NOTIFY_DONE;
+ }
+-#endif
+
+ static void __init map_vsyscall(void)
+ {
+ extern char __vsyscall_0;
+ unsigned long physaddr_page0 = __pa_symbol(&__vsyscall_0);
+
++ /* Note that VSYSCALL_MAPPED_PAGES must agree with the code below. */
+ __set_fixmap(VSYSCALL_FIRST_PAGE, physaddr_page0, PAGE_KERNEL_VSYSCALL);
+ }
+
+Index: head-2008-12-01/arch/x86/mm/fault_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -23,9 +23,9 @@
+ #include <linux/compiler.h>
+ #include <linux/module.h>
+ #include <linux/kprobes.h>
++#include <linux/uaccess.h>
+
+ #include <asm/system.h>
+-#include <asm/uaccess.h>
+ #include <asm/pgalloc.h>
+ #include <asm/smp.h>
+ #include <asm/tlbflush.h>
+@@ -96,7 +96,7 @@ void bust_spinlocks(int yes)
+ static noinline int is_prefetch(struct pt_regs *regs, unsigned long addr,
+ unsigned long error_code)
+ {
+- unsigned char __user *instr;
++ unsigned char *instr;
+ int scan_more = 1;
+ int prefetch = 0;
+ unsigned char *max_instr;
+@@ -116,7 +116,7 @@ static noinline int is_prefetch(struct p
+ unsigned char instr_hi;
+ unsigned char instr_lo;
+
+- if (__get_user(opcode, (char __user *)instr))
++ if (probe_kernel_address(instr, opcode))
+ break;
+
+ instr_hi = opcode & 0xf0;
+@@ -154,7 +154,7 @@ static noinline int is_prefetch(struct p
+ case 0x00:
+ /* Prefetch instruction is 0x0F0D or 0x0F18 */
+ scan_more = 0;
+- if (__get_user(opcode, (char __user *)instr))
++ if (probe_kernel_address(instr, opcode))
+ break;
+ prefetch = (instr_lo == 0xF) &&
+ (opcode == 0x0D || opcode == 0x18);
+@@ -170,7 +170,7 @@ static noinline int is_prefetch(struct p
+ static int bad_address(void *p)
+ {
+ unsigned long dummy;
+- return __get_user(dummy, (unsigned long __user *)p);
++ return probe_kernel_address((unsigned long *)p, dummy);
+ }
+
+ void dump_pagetable(unsigned long address)
+Index: head-2008-12-01/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -1129,14 +1129,15 @@ static __init int x8664_sysctl_init(void
+ __initcall(x8664_sysctl_init);
+ #endif
+
+-/* A pseudo VMAs to allow ptrace access for the vsyscall page. This only
++/* A pseudo VMA to allow ptrace access for the vsyscall page. This only
+ covers the 64bit vsyscall page now. 32bit has a real VMA now and does
+ not need special handling anymore. */
+
+ static struct vm_area_struct gate_vma = {
+ .vm_start = VSYSCALL_START,
+- .vm_end = VSYSCALL_END,
+- .vm_page_prot = PAGE_READONLY
++ .vm_end = VSYSCALL_START + (VSYSCALL_MAPPED_PAGES << PAGE_SHIFT),
++ .vm_page_prot = PAGE_READONLY_EXEC,
++ .vm_flags = VM_READ | VM_EXEC
+ };
+
+ struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
+Index: head-2008-12-01/arch/x86/mm/pageattr_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pageattr_64-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pageattr_64-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -330,34 +330,40 @@ static struct page *split_large_page(uns
+ return base;
+ }
+
+-
+-static void flush_kernel_map(void *address)
++static void cache_flush_page(void *adr)
+ {
+- if (0 && address && cpu_has_clflush) {
+- /* is this worth it? */
+- int i;
+- for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
+- asm volatile("clflush (%0)" :: "r" (address + i));
+- } else
+- asm volatile("wbinvd":::"memory");
+- if (address)
+- __flush_tlb_one(address);
+- else
+- __flush_tlb_all();
++ int i;
++ for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
++ asm volatile("clflush (%0)" :: "r" (adr + i));
+ }
+
++static void flush_kernel_map(void *arg)
++{
++ struct list_head *l = (struct list_head *)arg;
++ struct page *pg;
+
+-static inline void flush_map(unsigned long address)
++ /* When clflush is available always use it because it is
++ much cheaper than WBINVD */
++ if (!cpu_has_clflush)
++ asm volatile("wbinvd" ::: "memory");
++ list_for_each_entry(pg, l, lru) {
++ void *adr = page_address(pg);
++ if (cpu_has_clflush)
++ cache_flush_page(adr);
++ __flush_tlb_one(adr);
++ }
++}
++
++static inline void flush_map(struct list_head *l)
+ {
+- on_each_cpu(flush_kernel_map, (void *)address, 1, 1);
++ on_each_cpu(flush_kernel_map, l, 1, 1);
+ }
+
+-static struct page *deferred_pages; /* protected by init_mm.mmap_sem */
++static LIST_HEAD(deferred_pages); /* protected by init_mm.mmap_sem */
+
+ static inline void save_page(struct page *fpage)
+ {
+- fpage->lru.next = (struct list_head *)deferred_pages;
+- deferred_pages = fpage;
++ list_add(&fpage->lru, &deferred_pages);
+ }
+
+ /*
+@@ -487,18 +493,18 @@ int change_page_attr(struct page *page,
+
+ void global_flush_tlb(void)
+ {
+- struct page *dpage;
++ struct page *pg, *next;
++ struct list_head l;
+
+ down_read(&init_mm.mmap_sem);
+- dpage = xchg(&deferred_pages, NULL);
++ list_replace_init(&deferred_pages, &l);
+ up_read(&init_mm.mmap_sem);
+
+- flush_map((dpage && !dpage->lru.next) ? (unsigned long)page_address(dpage) : 0);
+- while (dpage) {
+- struct page *tmp = dpage;
+- dpage = (struct page *)dpage->lru.next;
+- ClearPagePrivate(tmp);
+- __free_page(tmp);
++ flush_map(&l);
++
++ list_for_each_entry_safe(pg, next, &l, lru) {
++ ClearPagePrivate(pg);
++ __free_page(pg);
+ }
+ }
+
+Index: head-2008-12-01/drivers/pci/msi-xen.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/msi-xen.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/pci/msi-xen.c 2008-12-01 11:32:38.000000000 +0100
+@@ -263,10 +263,8 @@ void disable_msi_mode(struct pci_dev *de
+ pci_write_config_word(dev, msi_control_reg(pos), control);
+ dev->msix_enabled = 0;
+ }
+- if (pci_find_capability(dev, PCI_CAP_ID_EXP)) {
+- /* PCI Express Endpoint device detected */
+- pci_intx(dev, 1); /* enable intx */
+- }
++
++ pci_intx(dev, 1); /* enable intx */
+ }
+
+ static void enable_msi_mode(struct pci_dev *dev, int pos, int type)
+@@ -284,10 +282,8 @@ static void enable_msi_mode(struct pci_d
+ pci_write_config_word(dev, msi_control_reg(pos), control);
+ dev->msix_enabled = 1;
+ }
+- if (pci_find_capability(dev, PCI_CAP_ID_EXP)) {
+- /* PCI Express Endpoint device detected */
+- pci_intx(dev, 0); /* disable intx */
+- }
++
++ pci_intx(dev, 0); /* disable intx */
+ }
+
+ #ifdef CONFIG_PM
+Index: head-2008-12-01/drivers/xen/balloon/balloon.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/balloon/balloon.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/balloon/balloon.c 2008-12-01 11:32:38.000000000 +0100
+@@ -97,8 +97,8 @@ extern unsigned long totalhigh_pages;
+ static LIST_HEAD(ballooned_pages);
+
+ /* Main work function, always executed in process context. */
+-static void balloon_process(void *unused);
+-static DECLARE_WORK(balloon_worker, balloon_process, NULL);
++static void balloon_process(struct work_struct *unused);
++static DECLARE_WORK(balloon_worker, balloon_process);
+ static struct timer_list balloon_timer;
+
+ /* When ballooning out (allocating memory to return to Xen) we don't really
+@@ -389,7 +389,7 @@ static int decrease_reservation(unsigned
+ * by the balloon lock), or with changes to the Xen hard limit, but we will
+ * recover from these in time.
+ */
+-static void balloon_process(void *unused)
++static void balloon_process(struct work_struct *unused)
+ {
+ int need_sleep = 0;
+ long credit;
+Index: head-2008-12-01/drivers/xen/blkback/blkback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/blkback.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkback/blkback.c 2008-12-01 11:32:38.000000000 +0100
+@@ -37,6 +37,7 @@
+
+ #include <linux/spinlock.h>
+ #include <linux/kthread.h>
++#include <linux/freezer.h>
+ #include <linux/list.h>
+ #include <linux/delay.h>
+ #include <xen/balloon.h>
+Index: head-2008-12-01/drivers/xen/blkback/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/interface.c 2007-06-12 13:13:44.000000000 +0200
++++ head-2008-12-01/drivers/xen/blkback/interface.c 2008-12-01 11:32:38.000000000 +0100
+@@ -34,7 +34,7 @@
+ #include <xen/evtchn.h>
+ #include <linux/kthread.h>
+
+-static kmem_cache_t *blkif_cachep;
++static struct kmem_cache *blkif_cachep;
+
+ blkif_t *blkif_alloc(domid_t domid)
+ {
+Index: head-2008-12-01/drivers/xen/blkfront/blkfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkfront/blkfront.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkfront/blkfront.c 2008-12-01 11:32:38.000000000 +0100
+@@ -70,7 +70,7 @@ static int setup_blkring(struct xenbus_d
+ static void kick_pending_request_queues(struct blkfront_info *);
+
+ static irqreturn_t blkif_int(int irq, void *dev_id);
+-static void blkif_restart_queue(void *arg);
++static void blkif_restart_queue(struct work_struct *arg);
+ static void blkif_recover(struct blkfront_info *);
+ static void blkif_completion(struct blk_shadow *);
+ static void blkif_free(struct blkfront_info *, int);
+@@ -110,7 +110,7 @@ static int blkfront_probe(struct xenbus_
+ info->xbdev = dev;
+ info->vdevice = vdevice;
+ info->connected = BLKIF_STATE_DISCONNECTED;
+- INIT_WORK(&info->work, blkif_restart_queue, (void *)info);
++ INIT_WORK(&info->work, blkif_restart_queue);
+
+ for (i = 0; i < BLK_RING_SIZE; i++)
+ info->shadow[i].req.id = i+1;
+@@ -459,9 +459,9 @@ static void kick_pending_request_queues(
+ }
+ }
+
+-static void blkif_restart_queue(void *arg)
++static void blkif_restart_queue(struct work_struct *arg)
+ {
+- struct blkfront_info *info = (struct blkfront_info *)arg;
++ struct blkfront_info *info = container_of(arg, struct blkfront_info, work);
+ spin_lock_irq(&blkif_io_lock);
+ if (info->connected == BLKIF_STATE_CONNECTED)
+ kick_pending_request_queues(info);
+Index: head-2008-12-01/drivers/xen/blktap/blktap.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blktap/blktap.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/blktap/blktap.c 2008-12-01 11:32:38.000000000 +0100
+@@ -40,6 +40,7 @@
+
+ #include <linux/spinlock.h>
+ #include <linux/kthread.h>
++#include <linux/freezer.h>
+ #include <linux/list.h>
+ #include <asm/hypervisor.h>
+ #include "common.h"
+Index: head-2008-12-01/drivers/xen/blktap/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blktap/interface.c 2008-09-15 13:40:15.000000000 +0200
++++ head-2008-12-01/drivers/xen/blktap/interface.c 2008-12-01 11:32:38.000000000 +0100
+@@ -34,7 +34,7 @@
+ #include "common.h"
+ #include <xen/evtchn.h>
+
+-static kmem_cache_t *blkif_cachep;
++static struct kmem_cache *blkif_cachep;
+
+ blkif_t *tap_alloc_blkif(domid_t domid)
+ {
+Index: head-2008-12-01/drivers/xen/char/mem.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/char/mem.c 2007-08-06 15:10:49.000000000 +0200
++++ head-2008-12-01/drivers/xen/char/mem.c 2008-12-01 11:32:38.000000000 +0100
+@@ -157,7 +157,7 @@ static loff_t memory_lseek(struct file *
+ {
+ loff_t ret;
+
+- mutex_lock(&file->f_dentry->d_inode->i_mutex);
++ mutex_lock(&file->f_path.dentry->d_inode->i_mutex);
+ switch (orig) {
+ case 0:
+ file->f_pos = offset;
+@@ -172,7 +172,7 @@ static loff_t memory_lseek(struct file *
+ default:
+ ret = -EINVAL;
+ }
+- mutex_unlock(&file->f_dentry->d_inode->i_mutex);
++ mutex_unlock(&file->f_path.dentry->d_inode->i_mutex);
+ return ret;
+ }
+
+Index: head-2008-12-01/drivers/xen/console/console.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/console/console.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/console/console.c 2008-12-01 11:32:38.000000000 +0100
+@@ -80,11 +80,6 @@ static int xc_num = -1;
+ #define XEN_XVC_MAJOR 204
+ #define XEN_XVC_MINOR 191
+
+-#ifdef CONFIG_MAGIC_SYSRQ
+-static unsigned long sysrq_requested;
+-extern int sysrq_enabled;
+-#endif
+-
+ static int __init xencons_setup(char *str)
+ {
+ char *q;
+@@ -339,8 +334,8 @@ void __init dom0_init_screen_info(const
+ #define DUMMY_TTY(_tty) ((xc_mode == XC_TTY) && \
+ ((_tty)->index != (xc_num - 1)))
+
+-static struct termios *xencons_termios[MAX_NR_CONSOLES];
+-static struct termios *xencons_termios_locked[MAX_NR_CONSOLES];
++static struct ktermios *xencons_termios[MAX_NR_CONSOLES];
++static struct ktermios *xencons_termios_locked[MAX_NR_CONSOLES];
+ static struct tty_struct *xencons_tty;
+ static int xencons_priv_irq;
+ static char x_char;
+@@ -356,7 +351,9 @@ void xencons_rx(char *buf, unsigned len)
+
+ for (i = 0; i < len; i++) {
+ #ifdef CONFIG_MAGIC_SYSRQ
+- if (sysrq_enabled) {
++ if (sysrq_on()) {
++ static unsigned long sysrq_requested;
++
+ if (buf[i] == '\x0f') { /* ^O */
+ if (!sysrq_requested) {
+ sysrq_requested = jiffies;
+Index: head-2008-12-01/drivers/xen/core/reboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/reboot.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/reboot.c 2008-12-01 11:32:38.000000000 +0100
+@@ -34,8 +34,8 @@ static int suspend_cancelled;
+ /* Can we leave APs online when we suspend? */
+ static int fast_suspend;
+
+-static void __shutdown_handler(void *unused);
+-static DECLARE_WORK(shutdown_work, __shutdown_handler, NULL);
++static void __shutdown_handler(struct work_struct *unused);
++static DECLARE_DELAYED_WORK(shutdown_work, __shutdown_handler);
+
+ static int setup_suspend_evtchn(void);
+
+@@ -105,7 +105,7 @@ static int xen_suspend(void *__unused)
+ case SHUTDOWN_RESUMING:
+ break;
+ default:
+- schedule_work(&shutdown_work);
++ schedule_delayed_work(&shutdown_work, 0);
+ break;
+ }
+
+@@ -137,12 +137,12 @@ static void switch_shutdown_state(int ne
+
+ /* Either we kick off the work, or we leave it to xen_suspend(). */
+ if (old_state == SHUTDOWN_INVALID)
+- schedule_work(&shutdown_work);
++ schedule_delayed_work(&shutdown_work, 0);
+ else
+ BUG_ON(old_state != SHUTDOWN_RESUMING);
+ }
+
+-static void __shutdown_handler(void *unused)
++static void __shutdown_handler(struct work_struct *unused)
+ {
+ int err;
+
+Index: head-2008-12-01/drivers/xen/core/smpboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/smpboot.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/smpboot.c 2008-12-01 11:32:38.000000000 +0100
+@@ -165,7 +165,12 @@ static void xen_smp_intr_exit(unsigned i
+
+ void __cpuinit cpu_bringup(void)
+ {
++#ifdef __i386__
++ cpu_set_gdt(current_thread_info()->cpu);
++ secondary_cpu_init();
++#else
+ cpu_init();
++#endif
+ identify_cpu(cpu_data + smp_processor_id());
+ touch_softlockup_watchdog();
+ preempt_disable();
+@@ -304,11 +309,12 @@ void __init smp_prepare_cpus(unsigned in
+ if (cpu == 0)
+ continue;
+
++ idle = fork_idle(cpu);
++ if (IS_ERR(idle))
++ panic("failed fork for CPU %d", cpu);
++
+ #ifdef __x86_64__
+ gdt_descr = &cpu_gdt_descr[cpu];
+-#else
+- gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
+-#endif
+ gdt_descr->address = get_zeroed_page(GFP_KERNEL);
+ if (unlikely(!gdt_descr->address)) {
+ printk(KERN_CRIT "CPU%d failed to allocate GDT\n",
+@@ -317,6 +323,11 @@ void __init smp_prepare_cpus(unsigned in
+ }
+ gdt_descr->size = GDT_SIZE;
+ memcpy((void *)gdt_descr->address, cpu_gdt_table, GDT_SIZE);
++#else
++ if (unlikely(!init_gdt(cpu, idle)))
++ continue;
++ gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++#endif
+ make_page_readonly(
+ (void *)gdt_descr->address,
+ XENFEAT_writable_descriptor_tables);
+@@ -336,10 +347,6 @@ void __init smp_prepare_cpus(unsigned in
+ cpu_2_logical_apicid[cpu] = apicid;
+ x86_cpu_to_apicid[cpu] = apicid;
+
+- idle = fork_idle(cpu);
+- if (IS_ERR(idle))
+- panic("failed fork for CPU %d", cpu);
+-
+ #ifdef __x86_64__
+ cpu_pda(cpu)->pcurrent = idle;
+ cpu_pda(cpu)->cpunumber = cpu;
+Index: head-2008-12-01/drivers/xen/fbfront/xenfb.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/fbfront/xenfb.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/fbfront/xenfb.c 2008-12-01 11:32:38.000000000 +0100
+@@ -25,6 +25,7 @@
+ #include <linux/vmalloc.h>
+ #include <linux/mm.h>
+ #include <linux/mutex.h>
++#include <linux/freezer.h>
+ #include <asm/hypervisor.h>
+ #include <xen/evtchn.h>
+ #include <xen/interface/io/fbif.h>
+Index: head-2008-12-01/drivers/xen/netback/loopback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/loopback.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/loopback.c 2008-12-01 11:32:38.000000000 +0100
+@@ -54,6 +54,7 @@
+ #include <net/dst.h>
+ #include <net/xfrm.h> /* secpath_reset() */
+ #include <asm/hypervisor.h> /* is_initial_xendomain() */
++#include <../net/core/kmap_skb.h> /* k{,un}map_skb_frag() */
+
+ static int nloopbacks = -1;
+ module_param(nloopbacks, int, 0);
+Index: head-2008-12-01/drivers/xen/pciback/conf_space_header.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pciback/conf_space_header.c 2008-10-29 09:55:56.000000000 +0100
++++ head-2008-12-01/drivers/xen/pciback/conf_space_header.c 2008-12-01 11:32:38.000000000 +0100
+@@ -22,14 +22,14 @@ static int command_write(struct pci_dev
+ {
+ int err;
+
+- if (!dev->is_enabled && is_enable_cmd(value)) {
++ if (!atomic_read(&dev->enable_cnt) && is_enable_cmd(value)) {
+ if (unlikely(verbose_request))
+ printk(KERN_DEBUG "pciback: %s: enable\n",
+ pci_name(dev));
+ err = pci_enable_device(dev);
+ if (err)
+ return err;
+- } else if (dev->is_enabled && !is_enable_cmd(value)) {
++ } else if (atomic_read(&dev->enable_cnt) && !is_enable_cmd(value)) {
+ if (unlikely(verbose_request))
+ printk(KERN_DEBUG "pciback: %s: disable\n",
+ pci_name(dev));
+Index: head-2008-12-01/drivers/xen/pciback/pciback.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pciback/pciback.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/pciback/pciback.h 2008-12-01 11:32:38.000000000 +0100
+@@ -88,7 +88,7 @@ void pciback_release_devices(struct pcib
+
+ /* Handles events from front-end */
+ irqreturn_t pciback_handle_event(int irq, void *dev_id);
+-void pciback_do_op(void *data);
++void pciback_do_op(struct work_struct *work);
+
+ int pciback_xenbus_register(void);
+ void pciback_xenbus_unregister(void);
+Index: head-2008-12-01/drivers/xen/pciback/pciback_ops.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pciback/pciback_ops.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/pciback/pciback_ops.c 2008-12-01 11:32:38.000000000 +0100
+@@ -25,7 +25,7 @@ void pciback_reset_device(struct pci_dev
+
+ pci_write_config_word(dev, PCI_COMMAND, 0);
+
+- dev->is_enabled = 0;
++ atomic_set(&dev->enable_cnt, 0);
+ dev->is_busmaster = 0;
+ } else {
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+@@ -51,9 +51,9 @@ static inline void test_and_schedule_op(
+ * context because some of the pci_* functions can sleep (mostly due to ACPI
+ * use of semaphores). This function is intended to be called from a work
+ * queue in process context taking a struct pciback_device as a parameter */
+-void pciback_do_op(void *data)
++void pciback_do_op(struct work_struct *work)
+ {
+- struct pciback_device *pdev = data;
++ struct pciback_device *pdev = container_of(work, struct pciback_device, op_work);
+ struct pci_dev *dev;
+ struct xen_pci_op *op = &pdev->sh_info->op;
+
+Index: head-2008-12-01/drivers/xen/pciback/xenbus.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pciback/xenbus.c 2008-07-21 11:00:33.000000000 +0200
++++ head-2008-12-01/drivers/xen/pciback/xenbus.c 2008-12-01 11:32:38.000000000 +0100
+@@ -32,7 +32,7 @@ static struct pciback_device *alloc_pdev
+ pdev->evtchn_irq = INVALID_EVTCHN_IRQ;
+ pdev->be_watching = 0;
+
+- INIT_WORK(&pdev->op_work, pciback_do_op, pdev);
++ INIT_WORK(&pdev->op_work, pciback_do_op);
+
+ if (pciback_init_devices(pdev)) {
+ kfree(pdev);
+@@ -54,7 +54,6 @@ static void pciback_disconnect(struct pc
+
+ /* If the driver domain started an op, make sure we complete it or
+ * delete it before releasing the shared memory */
+- cancel_delayed_work(&pdev->op_work);
+ flush_scheduled_work();
+
+ if (pdev->sh_info != NULL) {
+Index: head-2008-12-01/drivers/xen/scsiback/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsiback/interface.c 2008-07-21 11:00:33.000000000 +0200
++++ head-2008-12-01/drivers/xen/scsiback/interface.c 2008-12-01 11:32:38.000000000 +0100
+@@ -39,7 +39,7 @@
+ #include <linux/kthread.h>
+
+
+-static kmem_cache_t *scsiback_cachep;
++static struct kmem_cache *scsiback_cachep;
+
+ struct vscsibk_info *vscsibk_info_alloc(domid_t domid)
+ {
+Index: head-2008-12-01/drivers/xen/scsiback/scsiback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsiback/scsiback.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsiback/scsiback.c 2008-12-01 11:32:38.000000000 +0100
+@@ -322,13 +322,11 @@ static int scsiback_merge_bio(struct req
+
+ if (!rq->bio)
+ blk_rq_bio_prep(q, rq, bio);
+- else if (!q->back_merge_fn(q, rq, bio))
++ else if (!ll_back_merge_fn(q, rq, bio))
+ return -EINVAL;
+ else {
+ rq->biotail->bi_next = bio;
+ rq->biotail = bio;
+- rq->hard_nr_sectors += bio_sectors(bio);
+- rq->nr_sectors = rq->hard_nr_sectors;
+ }
+
+ return 0;
+Index: head-2008-12-01/drivers/xen/sfc_netfront/accel_vi.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netfront/accel_vi.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netfront/accel_vi.c 2008-12-01 11:32:38.000000000 +0100
+@@ -463,7 +463,7 @@ netfront_accel_enqueue_skb_multi(netfron
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ /* Set to zero to encourage falcon to work it out for us */
+- *(u16*)(skb->h.raw + skb->csum) = 0;
++ *(u16*)(skb->h.raw + skb->csum_offset) = 0;
+ }
+
+ if (multi_post_start_new_buffer(vnic, &state)) {
+@@ -582,7 +582,7 @@ netfront_accel_enqueue_skb_single(netfro
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ /* Set to zero to encourage falcon to work it out for us */
+- *(u16*)(skb->h.raw + skb->csum) = 0;
++ *(u16*)(skb->h.raw + skb->csum_offset) = 0;
+ }
+ NETFRONT_ACCEL_PKTBUFF_FOR_EACH_FRAGMENT
+ (skb, idx, frag_data, frag_len, {
+Index: head-2008-12-01/drivers/xen/tpmback/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/tpmback/interface.c 2008-01-21 11:15:26.000000000 +0100
++++ head-2008-12-01/drivers/xen/tpmback/interface.c 2008-12-01 11:32:38.000000000 +0100
+@@ -15,7 +15,7 @@
+ #include <xen/balloon.h>
+ #include <xen/gnttab.h>
+
+-static kmem_cache_t *tpmif_cachep;
++static struct kmem_cache *tpmif_cachep;
+ int num_frontends = 0;
+
+ LIST_HEAD(tpmif_list);
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_comms.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_comms.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_comms.c 2008-12-01 11:32:38.000000000 +0100
+@@ -49,9 +49,9 @@
+
+ static int xenbus_irq;
+
+-extern void xenbus_probe(void *);
++extern void xenbus_probe(struct work_struct *);
+ extern int xenstored_ready;
+-static DECLARE_WORK(probe_work, xenbus_probe, NULL);
++static DECLARE_WORK(probe_work, xenbus_probe);
+
+ static DECLARE_WAIT_QUEUE_HEAD(xb_waitq);
+
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_probe.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_probe.c 2008-12-01 11:22:58.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_probe.c 2008-12-01 11:32:38.000000000 +0100
+@@ -843,7 +843,7 @@ void unregister_xenstore_notifier(struct
+ EXPORT_SYMBOL_GPL(unregister_xenstore_notifier);
+
+
+-void xenbus_probe(void *unused)
++void xenbus_probe(struct work_struct *unused)
+ {
+ BUG_ON((xenstored_ready <= 0));
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/desc_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/desc_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/desc_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -4,8 +4,6 @@
+ #include <asm/ldt.h>
+ #include <asm/segment.h>
+
+-#define CPU_16BIT_STACK_SIZE 1024
+-
+ #ifndef __ASSEMBLY__
+
+ #include <linux/preempt.h>
+@@ -15,8 +13,6 @@
+
+ extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+
+-DECLARE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
+-
+ struct Xgt_desc_struct {
+ unsigned short size;
+ unsigned long address __attribute__((packed));
+@@ -32,11 +28,6 @@ static inline struct desc_struct *get_cp
+ return (struct desc_struct *)per_cpu(cpu_gdt_descr, cpu).address;
+ }
+
+-/*
+- * This is the ldt that every process will get unless we need
+- * something other than this.
+- */
+-extern struct desc_struct default_ldt[];
+ extern struct desc_struct idt_table[];
+ extern void set_intr_gate(unsigned int irq, void * addr);
+
+@@ -63,8 +54,8 @@ static inline void pack_gate(__u32 *a, _
+ #define DESCTYPE_DPL3 0x60 /* DPL-3 */
+ #define DESCTYPE_S 0x10 /* !system */
+
++#ifndef CONFIG_XEN
+ #define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
+-#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8))
+
+ #define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr))
+ #define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr))
+@@ -75,6 +66,7 @@ static inline void pack_gate(__u32 *a, _
+ #define store_idt(dtr) __asm__ ("sidt %0":"=m" (*dtr))
+ #define store_tr(tr) __asm__ ("str %0":"=m" (tr))
+ #define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
++#endif
+
+ #if TLS_SIZE != 24
+ # error update this code.
+@@ -90,22 +82,43 @@ static inline void load_TLS(struct threa
+ }
+
+ #ifndef CONFIG_XEN
++#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
++#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
++#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
++
+ static inline void write_dt_entry(void *dt, int entry, __u32 entry_a, __u32 entry_b)
+ {
+ __u32 *lp = (__u32 *)((char *)dt + entry*8);
+ *lp = entry_a;
+ *(lp+1) = entry_b;
+ }
+-
+-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
++#define set_ldt native_set_ldt
+ #else
+ extern int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b);
+ extern int write_gdt_entry(void *gdt, int entry, __u32 entry_a, __u32 entry_b);
++#define set_ldt xen_set_ldt
++#endif
++
++#ifndef CONFIG_XEN
++static inline fastcall void native_set_ldt(const void *addr,
++ unsigned int entries)
++{
++ if (likely(entries == 0))
++ __asm__ __volatile__("lldt %w0"::"q" (0));
++ else {
++ unsigned cpu = smp_processor_id();
++ __u32 a, b;
++
++ pack_descriptor(&a, &b, (unsigned long)addr,
++ entries * sizeof(struct desc_struct) - 1,
++ DESCTYPE_LDT, 0);
++ write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
++ __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
++ }
++}
+ #endif
+-#ifndef CONFIG_X86_NO_IDT
+-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+
++#ifndef CONFIG_X86_NO_IDT
+ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
+ {
+ __u32 a, b;
+@@ -125,14 +138,6 @@ static inline void __set_tss_desc(unsign
+ }
+ #endif
+
+-static inline void set_ldt_desc(unsigned int cpu, void *addr, unsigned int entries)
+-{
+- __u32 a, b;
+- pack_descriptor(&a, &b, (unsigned long)addr,
+- entries * sizeof(struct desc_struct) - 1,
+- DESCTYPE_LDT, 0);
+- write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+-}
+
+ #define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
+@@ -163,36 +168,22 @@ static inline void set_ldt_desc(unsigned
+
+ static inline void clear_LDT(void)
+ {
+- int cpu = get_cpu();
+-
+- /*
+- * NB. We load the default_ldt for lcall7/27 handling on demand, as
+- * it slows down context switching. Noone uses it anyway.
+- */
+- cpu = cpu; /* XXX avoid compiler warning */
+- xen_set_ldt(NULL, 0);
+- put_cpu();
++ set_ldt(NULL, 0);
+ }
+
+ /*
+ * load one particular LDT into the current CPU
+ */
+-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
++static inline void load_LDT_nolock(mm_context_t *pc)
+ {
+- void *segments = pc->ldt;
+- int count = pc->size;
+-
+- if (likely(!count))
+- segments = NULL;
+-
+- xen_set_ldt(segments, count);
++ set_ldt(pc->ldt, pc->size);
+ }
+
+ static inline void load_LDT(mm_context_t *pc)
+ {
+- int cpu = get_cpu();
+- load_LDT_nolock(pc, cpu);
+- put_cpu();
++ preempt_disable();
++ load_LDT_nolock(pc);
++ preempt_enable();
+ }
+
+ static inline unsigned long get_desc_base(unsigned long *desc)
+@@ -204,6 +195,29 @@ static inline unsigned long get_desc_bas
+ return base;
+ }
+
++#else /* __ASSEMBLY__ */
++
++/*
++ * GET_DESC_BASE reads the descriptor base of the specified segment.
++ *
++ * Args:
++ * idx - descriptor index
++ * gdt - GDT pointer
++ * base - 32bit register to which the base will be written
++ * lo_w - lo word of the "base" register
++ * lo_b - lo byte of the "base" register
++ * hi_b - hi byte of the low word of the "base" register
++ *
++ * Example:
++ * GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
++ * Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
++ */
++#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
++ movb idx*8+4(gdt), lo_b; \
++ movb idx*8+7(gdt), hi_b; \
++ shll $16, base; \
++ movw idx*8+2(gdt), lo_w;
++
+ #endif /* !__ASSEMBLY__ */
+
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/dma-mapping_32.h 2008-04-02 12:34:02.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -127,10 +127,10 @@ dma_get_cache_alignment(void)
+ return (1 << INTERNODE_CACHE_SHIFT);
+ }
+
+-#define dma_is_consistent(d) (1)
++#define dma_is_consistent(d, h) (1)
+
+ static inline void
+-dma_cache_sync(void *vaddr, size_t size,
++dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+ enum dma_data_direction direction)
+ {
+ flush_write_buffers();
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -13,13 +13,16 @@
+ #ifndef _ASM_FIXMAP_H
+ #define _ASM_FIXMAP_H
+
+-
+ /* used by vmalloc.c, vsyscall.lds.S.
+ *
+ * Leave one empty page between vmalloc'ed areas and
+ * the start of the fixmap.
+ */
+ extern unsigned long __FIXADDR_TOP;
++#ifdef CONFIG_COMPAT_VDSO
++#define FIXADDR_USER_START __fix_to_virt(FIX_VDSO)
++#define FIXADDR_USER_END __fix_to_virt(FIX_VDSO - 1)
++#endif
+
+ #ifndef __ASSEMBLY__
+ #include <linux/kernel.h>
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/highmem.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/highmem.h 2008-10-29 09:55:56.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/highmem.h 2008-12-01 11:32:38.000000000 +0100
+@@ -85,7 +85,7 @@ static inline void clear_user_highpage(s
+
+ void copy_highpage(struct page *to, struct page *from);
+ static inline void copy_user_highpage(struct page *to, struct page *from,
+- unsigned long vaddr)
++ unsigned long vaddr, struct vm_area_struct *vma)
+ {
+ copy_highpage(to, from);
+ }
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 11:32:38.000000000 +0100
+@@ -46,15 +46,6 @@
+ #include <asm/percpu.h>
+ #include <asm/ptrace.h>
+ #include <asm/page.h>
+-#if defined(__i386__)
+-# ifdef CONFIG_X86_PAE
+-# include <asm-generic/pgtable-nopud.h>
+-# else
+-# include <asm-generic/pgtable-nopmd.h>
+-# endif
+-#elif defined(__x86_64__) && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
+-# include <asm-generic/pgtable-nopud.h>
+-#endif
+
+ extern shared_info_t *HYPERVISOR_shared_info;
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -269,11 +269,7 @@ static inline void flush_write_buffers(v
+
+ #endif /* __KERNEL__ */
+
+-#ifdef SLOW_IO_BY_JUMPING
+-#define __SLOW_DOWN_IO "jmp 1f; 1: jmp 1f; 1:"
+-#else
+ #define __SLOW_DOWN_IO "outb %%al,$0x80;"
+-#endif
+
+ static inline void slow_down_io(void) {
+ __asm__ __volatile__(
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/irqflags_32.h 2007-06-12 13:14:02.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -22,9 +22,6 @@
+
+ #define __raw_local_save_flags() (current_vcpu_info()->evtchn_upcall_mask)
+
+-#define raw_local_save_flags(flags) \
+- do { (flags) = __raw_local_save_flags(); } while (0)
+-
+ #define raw_local_irq_restore(x) \
+ do { \
+ vcpu_info_t *_vcpu; \
+@@ -66,18 +63,6 @@ void raw_safe_halt(void);
+ */
+ void halt(void);
+
+-static inline int raw_irqs_disabled_flags(unsigned long flags)
+-{
+- return (flags != 0);
+-}
+-
+-#define raw_irqs_disabled() \
+-({ \
+- unsigned long flags = __raw_local_save_flags(); \
+- \
+- raw_irqs_disabled_flags(flags); \
+-})
+-
+ /*
+ * For spinlocks, etc:
+ */
+@@ -90,9 +75,62 @@ static inline int raw_irqs_disabled_flag
+ flags; \
+ })
+
++#else
++/* Offsets into shared_info_t. */
++#define evtchn_upcall_pending /* 0 */
++#define evtchn_upcall_mask 1
++
++#define sizeof_vcpu_shift 6
++
++#ifdef CONFIG_SMP
++#define GET_VCPU_INFO movl TI_cpu(%ebp),%esi ; \
++ shl $sizeof_vcpu_shift,%esi ; \
++ addl HYPERVISOR_shared_info,%esi
++#else
++#define GET_VCPU_INFO movl HYPERVISOR_shared_info,%esi
++#endif
++
++#define __DISABLE_INTERRUPTS movb $1,evtchn_upcall_mask(%esi)
++#define __ENABLE_INTERRUPTS movb $0,evtchn_upcall_mask(%esi)
++#define __TEST_PENDING testb $0xFF,evtchn_upcall_pending(%esi)
++#define DISABLE_INTERRUPTS(clb) GET_VCPU_INFO ; \
++ __DISABLE_INTERRUPTS
++#define ENABLE_INTERRUPTS(clb) GET_VCPU_INFO ; \
++ __ENABLE_INTERRUPTS
++#define ENABLE_INTERRUPTS_SYSEXIT __ENABLE_INTERRUPTS ; \
++sysexit_scrit: /**** START OF SYSEXIT CRITICAL REGION ****/ ; \
++ __TEST_PENDING ; \
++ jnz 14f /* process more events if necessary... */ ; \
++ movl PT_ESI(%esp), %esi ; \
++ sysexit ; \
++14: __DISABLE_INTERRUPTS ; \
++ TRACE_IRQS_OFF ; \
++sysexit_ecrit: /**** END OF SYSEXIT CRITICAL REGION ****/ ; \
++ push %esp ; \
++ call evtchn_do_upcall ; \
++ add $4,%esp ; \
++ jmp ret_from_intr
++#define INTERRUPT_RETURN iret
++#endif /* __ASSEMBLY__ */
++
++#ifndef __ASSEMBLY__
++#define raw_local_save_flags(flags) \
++ do { (flags) = __raw_local_save_flags(); } while (0)
++
+ #define raw_local_irq_save(flags) \
+ do { (flags) = __raw_local_irq_save(); } while (0)
+
++static inline int raw_irqs_disabled_flags(unsigned long flags)
++{
++ return (flags != 0);
++}
++
++#define raw_irqs_disabled() \
++({ \
++ unsigned long flags = __raw_local_save_flags(); \
++ \
++ raw_irqs_disabled_flags(flags); \
++})
+ #endif /* __ASSEMBLY__ */
+
+ /*
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/mmu_context_32.h 2007-06-12 13:14:02.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -27,14 +27,13 @@ static inline void enter_lazy_tlb(struct
+ static inline void __prepare_arch_switch(void)
+ {
+ /*
+- * Save away %fs and %gs. No need to save %es and %ds, as those
+- * are always kernel segments while inside the kernel. Must
+- * happen before reload of cr3/ldt (i.e., not in __switch_to).
++ * Save away %fs. No need to save %gs, as it was saved on the
++ * stack on entry. No need to save %es and %ds, as those are
++ * always kernel segments while inside the kernel.
+ */
+- asm volatile ( "mov %%fs,%0 ; mov %%gs,%1"
+- : "=m" (current->thread.fs),
+- "=m" (current->thread.gs));
+- asm volatile ( "movl %0,%%fs ; movl %0,%%gs"
++ asm volatile ( "mov %%fs,%0"
++ : "=m" (current->thread.fs));
++ asm volatile ( "movl %0,%%fs"
+ : : "r" (0) );
+ }
+
+@@ -89,14 +88,14 @@ static inline void switch_mm(struct mm_s
+ * tlb flush IPI delivery. We must reload %cr3.
+ */
+ load_cr3(next->pgd);
+- load_LDT_nolock(&next->context, cpu);
++ load_LDT_nolock(&next->context);
+ }
+ }
+ #endif
+ }
+
+-#define deactivate_mm(tsk, mm) \
+- asm("movl %0,%%fs ; movl %0,%%gs": :"r" (0))
++#define deactivate_mm(tsk, mm) \
++ asm("movl %0,%%fs": :"r" (0));
+
+ static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
+ {
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 11:32:38.000000000 +0100
+@@ -1,8 +1,6 @@
+ #ifndef _I386_PGTABLE_3LEVEL_H
+ #define _I386_PGTABLE_3LEVEL_H
+
+-#include <asm-generic/pgtable-nopud.h>
+-
+ /*
+ * Intel Physical Address Extension (PAE) Mode - three-level page
+ * tables on PPro+ CPUs.
+@@ -75,6 +73,23 @@ static inline void set_pte(pte_t *ptep,
+ xen_l3_entry_update((pudptr), (pudval))
+
+ /*
++ * For PTEs and PDEs, we must clear the P-bit first when clearing a page table
++ * entry, so clear the bottom half first and enforce ordering with a compiler
++ * barrier.
++ */
++static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ if ((mm != current->mm && mm != &init_mm)
++ || HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
++ ptep->pte_low = 0;
++ smp_wmb();
++ ptep->pte_high = 0;
++ }
++}
++
++#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
++
++/*
+ * Pentium-II erratum A13: in PAE mode we explicitly have to flush
+ * the TLB via cr3 if the top-level pgd is changed...
+ * We do not let the generic code free and clear pgd entries due to
+@@ -93,45 +108,16 @@ static inline void pud_clear (pud_t * pu
+ #define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
+ pmd_index(address))
+
+-static inline int pte_none(pte_t pte)
+-{
+- return !(pte.pte_low | pte.pte_high);
+-}
+-
+-/*
+- * For PTEs and PDEs, we must clear the P-bit first when clearing a page table
+- * entry, so clear the bottom half first and enforce ordering with a compiler
+- * barrier.
+- */
+-static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++static inline pte_t raw_ptep_get_and_clear(pte_t *ptep, pte_t res)
+ {
+- if ((mm != current->mm && mm != &init_mm)
+- || HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
+- ptep->pte_low = 0;
+- smp_wmb();
++ uint64_t val = __pte_val(res);
++ if (__cmpxchg64(ptep, val, 0) != val) {
++ /* xchg acts as a barrier before the setting of the high bits */
++ res.pte_low = xchg(&ptep->pte_low, 0);
++ res.pte_high = ptep->pte_high;
+ ptep->pte_high = 0;
+ }
+-}
+-
+-#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
+-
+-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+-static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+-{
+- pte_t pte = *ptep;
+- if (!pte_none(pte)) {
+- if ((mm != &init_mm) ||
+- HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
+- uint64_t val = __pte_val(pte);
+- if (__cmpxchg64(ptep, val, 0) != val) {
+- /* xchg acts as a barrier before the setting of the high bits */
+- pte.pte_low = xchg(&ptep->pte_low, 0);
+- pte.pte_high = ptep->pte_high;
+- ptep->pte_high = 0;
+- }
+- }
+- }
+- return pte;
++ return res;
+ }
+
+ #define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+@@ -160,6 +146,11 @@ static inline int pte_same(pte_t a, pte_
+
+ #define pte_page(x) pfn_to_page(pte_pfn(x))
+
++static inline int pte_none(pte_t pte)
++{
++ return !(pte.pte_low | pte.pte_high);
++}
++
+ #define __pte_mfn(_pte) (((_pte).pte_low >> PAGE_SHIFT) | \
+ ((_pte).pte_high << (32-PAGE_SHIFT)))
+ #define pte_mfn(_pte) ((_pte).pte_low & _PAGE_PRESENT ? \
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -38,14 +38,14 @@ struct vm_area_struct;
+ #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+ extern unsigned long empty_zero_page[1024];
+ extern pgd_t *swapper_pg_dir;
+-extern kmem_cache_t *pgd_cache;
+-extern kmem_cache_t *pmd_cache;
++extern struct kmem_cache *pgd_cache;
++extern struct kmem_cache *pmd_cache;
+ extern spinlock_t pgd_lock;
+ extern struct page *pgd_list;
+
+-void pmd_ctor(void *, kmem_cache_t *, unsigned long);
+-void pgd_ctor(void *, kmem_cache_t *, unsigned long);
+-void pgd_dtor(void *, kmem_cache_t *, unsigned long);
++void pmd_ctor(void *, struct kmem_cache *, unsigned long);
++void pgd_ctor(void *, struct kmem_cache *, unsigned long);
++void pgd_dtor(void *, struct kmem_cache *, unsigned long);
+ void pgtable_cache_init(void);
+ void paging_init(void);
+
+@@ -276,7 +276,6 @@ static inline pte_t pte_mkhuge(pte_t pte
+ #define pte_update(mm, addr, ptep) do { } while (0)
+ #define pte_update_defer(mm, addr, ptep) do { } while (0)
+
+-
+ /*
+ * We only update the dirty/accessed state if we set
+ * the dirty bit by hand in the kernel, since the hardware
+@@ -342,6 +341,19 @@ do { \
+ __young; \
+ })
+
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
++static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ pte_t pte = *ptep;
++ if (!pte_none(pte)
++ && (mm != &init_mm
++ || HYPERVISOR_update_va_mapping(addr, __pte(0), 0))) {
++ pte = raw_ptep_get_and_clear(ptep, pte);
++ pte_update(mm, addr, ptep);
++ }
++ return pte;
++}
++
+ #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
+ #define ptep_get_and_clear_full(mm, addr, ptep, full) \
+ ((full) ? ({ \
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -20,6 +20,7 @@
+ #include <linux/threads.h>
+ #include <asm/percpu.h>
+ #include <linux/cpumask.h>
++#include <linux/init.h>
+ #include <xen/interface/physdev.h>
+
+ /* flag for disabling the tsc */
+@@ -73,6 +74,7 @@ struct cpuinfo_x86 {
+ #endif
+ unsigned char x86_max_cores; /* cpuid returned max cores value */
+ unsigned char apicid;
++ unsigned short x86_clflush_size;
+ #ifdef CONFIG_SMP
+ unsigned char booted_cores; /* number of cores as seen by OS */
+ __u8 phys_proc_id; /* Physical processor id. */
+@@ -114,6 +116,8 @@ extern struct cpuinfo_x86 cpu_data[];
+ extern int cpu_llc_id[NR_CPUS];
+ extern char ignore_fpu_irq;
+
++void __init cpu_detect(struct cpuinfo_x86 *c);
++
+ extern void identify_cpu(struct cpuinfo_x86 *);
+ extern void print_cpu_info(struct cpuinfo_x86 *);
+ extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
+@@ -146,8 +150,8 @@ static inline void detect_ht(struct cpui
+ #define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
+ #define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
+
+-static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
+- unsigned int *ecx, unsigned int *edx)
++static inline fastcall void xen_cpuid(unsigned int *eax, unsigned int *ebx,
++ unsigned int *ecx, unsigned int *edx)
+ {
+ /* ecx is often an input as well as an output. */
+ __asm__(XEN_CPUID
+@@ -158,59 +162,6 @@ static inline void __cpuid(unsigned int
+ : "0" (*eax), "2" (*ecx));
+ }
+
+-/*
+- * Generic CPUID function
+- * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
+- * resulting in stale register contents being returned.
+- */
+-static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx)
+-{
+- *eax = op;
+- *ecx = 0;
+- __cpuid(eax, ebx, ecx, edx);
+-}
+-
+-/* Some CPUID calls want 'count' to be placed in ecx */
+-static inline void cpuid_count(int op, int count, int *eax, int *ebx, int *ecx,
+- int *edx)
+-{
+- *eax = op;
+- *ecx = count;
+- __cpuid(eax, ebx, ecx, edx);
+-}
+-
+-/*
+- * CPUID functions returning a single datum
+- */
+-static inline unsigned int cpuid_eax(unsigned int op)
+-{
+- unsigned int eax, ebx, ecx, edx;
+-
+- cpuid(op, &eax, &ebx, &ecx, &edx);
+- return eax;
+-}
+-static inline unsigned int cpuid_ebx(unsigned int op)
+-{
+- unsigned int eax, ebx, ecx, edx;
+-
+- cpuid(op, &eax, &ebx, &ecx, &edx);
+- return ebx;
+-}
+-static inline unsigned int cpuid_ecx(unsigned int op)
+-{
+- unsigned int eax, ebx, ecx, edx;
+-
+- cpuid(op, &eax, &ebx, &ecx, &edx);
+- return ecx;
+-}
+-static inline unsigned int cpuid_edx(unsigned int op)
+-{
+- unsigned int eax, ebx, ecx, edx;
+-
+- cpuid(op, &eax, &ebx, &ecx, &edx);
+- return edx;
+-}
+-
+ #define load_cr3(pgdir) write_cr3(__pa(pgdir))
+
+ /*
+@@ -480,9 +431,9 @@ struct thread_struct {
+ .vm86_info = NULL, \
+ .sysenter_cs = __KERNEL_CS, \
+ .io_bitmap_ptr = NULL, \
++ .gs = __KERNEL_PDA, \
+ }
+
+-#ifndef CONFIG_X86_NO_TSS
+ /*
+ * Note that the .io_bitmap member must be extra-big. This is because
+ * the CPU will access an additional byte beyond the end of the IO
+@@ -497,26 +448,9 @@ struct thread_struct {
+ .io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
+ }
+
+-static inline void __load_esp0(struct tss_struct *tss, struct thread_struct *thread)
+-{
+- tss->esp0 = thread->esp0;
+- /* This can only happen when SEP is enabled, no need to test "SEP"arately */
+- if (unlikely(tss->ss1 != thread->sysenter_cs)) {
+- tss->ss1 = thread->sysenter_cs;
+- wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
+- }
+-}
+-#define load_esp0(tss, thread) \
+- __load_esp0(tss, thread)
+-#else
+-#define load_esp0(tss, thread) do { \
+- if (HYPERVISOR_stack_switch(__KERNEL_DS, (thread)->esp0)) \
+- BUG(); \
+-} while (0)
+-#endif
+-
+ #define start_thread(regs, new_eip, new_esp) do { \
+- __asm__("movl %0,%%fs ; movl %0,%%gs": :"r" (0)); \
++ __asm__("movl %0,%%fs": :"r" (0)); \
++ regs->xgs = 0; \
+ set_fs(USER_DS); \
+ regs->xds = __USER_DS; \
+ regs->xes = __USER_DS; \
+@@ -526,26 +460,6 @@ static inline void __load_esp0(struct ts
+ regs->esp = new_esp; \
+ } while (0)
+
+-/*
+- * These special macros can be used to get or set a debugging register
+- */
+-#define get_debugreg(var, register) \
+- (var) = HYPERVISOR_get_debugreg((register))
+-#define set_debugreg(value, register) \
+- WARN_ON(HYPERVISOR_set_debugreg((register), (value)))
+-
+-/*
+- * Set IOPL bits in EFLAGS from given mask
+- */
+-static inline void set_iopl_mask(unsigned mask)
+-{
+- struct physdev_set_iopl set_iopl;
+-
+- /* Force the change at ring 0. */
+- set_iopl.iopl = (mask == 0) ? 1 : (mask >> 12) & 3;
+- WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
+-}
+-
+ /* Forward declaration, a strange C thing */
+ struct task_struct;
+ struct mm_struct;
+@@ -637,6 +551,105 @@ static inline void rep_nop(void)
+
+ #define cpu_relax() rep_nop()
+
++#define paravirt_enabled() 0
++#define __cpuid xen_cpuid
++
++#ifndef CONFIG_X86_NO_TSS
++static inline void __load_esp0(struct tss_struct *tss, struct thread_struct *thread)
++{
++ tss->esp0 = thread->esp0;
++ /* This can only happen when SEP is enabled, no need to test "SEP"arately */
++ if (unlikely(tss->ss1 != thread->sysenter_cs)) {
++ tss->ss1 = thread->sysenter_cs;
++ wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
++ }
++}
++#define load_esp0(tss, thread) \
++ __load_esp0(tss, thread)
++#else
++#define load_esp0(tss, thread) do { \
++ if (HYPERVISOR_stack_switch(__KERNEL_DS, (thread)->esp0)) \
++ BUG(); \
++} while (0)
++#endif
++
++
++/*
++ * These special macros can be used to get or set a debugging register
++ */
++#define get_debugreg(var, register) \
++ (var) = HYPERVISOR_get_debugreg(register)
++#define set_debugreg(value, register) \
++ WARN_ON(HYPERVISOR_set_debugreg(register, value))
++
++#define set_iopl_mask xen_set_iopl_mask
++
++/*
++ * Set IOPL bits in EFLAGS from given mask
++ */
++static inline void xen_set_iopl_mask(unsigned mask)
++{
++ struct physdev_set_iopl set_iopl;
++
++ /* Force the change at ring 0. */
++ set_iopl.iopl = (mask == 0) ? 1 : (mask >> 12) & 3;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
++}
++
++
++/*
++ * Generic CPUID function
++ * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
++ * resulting in stale register contents being returned.
++ */
++static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx)
++{
++ *eax = op;
++ *ecx = 0;
++ __cpuid(eax, ebx, ecx, edx);
++}
++
++/* Some CPUID calls want 'count' to be placed in ecx */
++static inline void cpuid_count(int op, int count, int *eax, int *ebx, int *ecx,
++ int *edx)
++{
++ *eax = op;
++ *ecx = count;
++ __cpuid(eax, ebx, ecx, edx);
++}
++
++/*
++ * CPUID functions returning a single datum
++ */
++static inline unsigned int cpuid_eax(unsigned int op)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ cpuid(op, &eax, &ebx, &ecx, &edx);
++ return eax;
++}
++static inline unsigned int cpuid_ebx(unsigned int op)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ cpuid(op, &eax, &ebx, &ecx, &edx);
++ return ebx;
++}
++static inline unsigned int cpuid_ecx(unsigned int op)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ cpuid(op, &eax, &ebx, &ecx, &edx);
++ return ecx;
++}
++static inline unsigned int cpuid_edx(unsigned int op)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ cpuid(op, &eax, &ebx, &ecx, &edx);
++ return edx;
++}
++
+ /* generic versions from gas */
+ #define GENERIC_NOP1 ".byte 0x90\n"
+ #define GENERIC_NOP2 ".byte 0x89,0xf6\n"
+@@ -736,4 +749,8 @@ extern unsigned long boot_option_idle_ov
+ extern void enable_sep_cpu(void);
+ extern int sysenter_setup(void);
+
++extern int init_gdt(int cpu, struct task_struct *idle);
++extern void cpu_set_gdt(int);
++extern void secondary_cpu_init(void);
++
+ #endif /* __ASM_I386_PROCESSOR_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/segment_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/segment_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/segment_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -39,7 +39,7 @@
+ * 25 - APM BIOS support
+ *
+ * 26 - ESPFIX small SS
+- * 27 - unused
++ * 27 - PDA [ per-cpu private data area ]
+ * 28 - unused
+ * 29 - unused
+ * 30 - unused
+@@ -74,6 +74,9 @@
+ #define GDT_ENTRY_ESPFIX_SS (GDT_ENTRY_KERNEL_BASE + 14)
+ #define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8)
+
++#define GDT_ENTRY_PDA (GDT_ENTRY_KERNEL_BASE + 15)
++#define __KERNEL_PDA (GDT_ENTRY_PDA * 8)
++
+ #define GDT_ENTRY_DOUBLEFAULT_TSS 31
+
+ /*
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/smp_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/smp_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/smp_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -8,6 +8,7 @@
+ #include <linux/kernel.h>
+ #include <linux/threads.h>
+ #include <linux/cpumask.h>
++#include <asm/pda.h>
+ #endif
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+@@ -56,7 +57,7 @@ extern void cpu_uninit(void);
+ * from the initial startup. We map APIC_BASE very early in page_setup(),
+ * so this is correct in the x86 case.
+ */
+-#define raw_smp_processor_id() (current_thread_info()->cpu)
++#define raw_smp_processor_id() (read_pda(cpu_number))
+
+ extern cpumask_t cpu_possible_map;
+ #define cpu_callin_map cpu_possible_map
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/system_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system_32.h 2008-12-01 11:32:38.000000000 +0100
+@@ -139,17 +139,17 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t"
+ #define write_cr4(x) \
+ __asm__ __volatile__("movl %0,%%cr4": :"r" (x))
+
+-/*
+- * Clear and set 'TS' bit respectively
+- */
++#define wbinvd() \
++ __asm__ __volatile__ ("wbinvd": : :"memory")
++
++/* Clear the 'TS' bit */
+ #define clts() (HYPERVISOR_fpu_taskswitch(0))
++
++/* Set the 'TS' bit */
+ #define stts() (HYPERVISOR_fpu_taskswitch(1))
+
+ #endif /* __KERNEL__ */
+
+-#define wbinvd() \
+- __asm__ __volatile__ ("wbinvd": : :"memory")
+-
+ static inline unsigned long get_limit(unsigned long segment)
+ {
+ unsigned long __limit;
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/desc_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/desc_64.h 2008-01-28 12:24:19.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/desc_64.h 2008-12-01 11:32:38.000000000 +0100
+@@ -9,62 +9,11 @@
+
+ #include <linux/string.h>
+ #include <linux/smp.h>
++#include <asm/desc_defs.h>
+
+ #include <asm/segment.h>
+ #include <asm/mmu.h>
+
+-// 8 byte segment descriptor
+-struct desc_struct {
+- u16 limit0;
+- u16 base0;
+- unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
+- unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
+-} __attribute__((packed));
+-
+-struct n_desc_struct {
+- unsigned int a,b;
+-};
+-
+-enum {
+- GATE_INTERRUPT = 0xE,
+- GATE_TRAP = 0xF,
+- GATE_CALL = 0xC,
+-};
+-
+-// 16byte gate
+-struct gate_struct {
+- u16 offset_low;
+- u16 segment;
+- unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
+- u16 offset_middle;
+- u32 offset_high;
+- u32 zero1;
+-} __attribute__((packed));
+-
+-#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
+-#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
+-#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
+-
+-enum {
+- DESC_TSS = 0x9,
+- DESC_LDT = 0x2,
+-};
+-
+-// LDT or TSS descriptor in the GDT. 16 bytes.
+-struct ldttss_desc {
+- u16 limit0;
+- u16 base0;
+- unsigned base1 : 8, type : 5, dpl : 2, p : 1;
+- unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
+- u32 base3;
+- u32 zero1;
+-} __attribute__((packed));
+-
+-struct desc_ptr {
+- unsigned short size;
+- unsigned long address;
+-} __attribute__((packed)) ;
+-
+ extern struct desc_ptr idt_descr, cpu_gdt_descr[NR_CPUS];
+
+ extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/dma-mapping_64.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_64.h 2008-12-01 11:32:38.000000000 +0100
+@@ -64,6 +64,9 @@ static inline int dma_mapping_error(dma_
+ return (dma_addr == bad_dma_address);
+ }
+
++#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
++#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
++
+ extern void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp);
+ extern void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+@@ -181,12 +184,13 @@ static inline int dma_get_cache_alignmen
+ return boot_cpu_data.x86_clflush_size;
+ }
+
+-#define dma_is_consistent(h) 1
++#define dma_is_consistent(d, h) 1
+
+ extern int dma_set_mask(struct device *dev, u64 mask);
+
+ static inline void
+-dma_cache_sync(void *vaddr, size_t size, enum dma_data_direction dir)
++dma_cache_sync(struct device *dev, void *vaddr, size_t size,
++ enum dma_data_direction dir)
+ {
+ flush_write_buffers();
+ }
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:32:38.000000000 +0100
+@@ -235,19 +235,18 @@ extern unsigned int __kernel_page_user;
+
+ static inline unsigned long pgd_bad(pgd_t pgd)
+ {
+- unsigned long val = __pgd_val(pgd);
+- val &= ~PTE_MASK;
+- val &= ~(_PAGE_USER | _PAGE_DIRTY);
+- return val & ~(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED);
++ return __pgd_val(pgd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
+ }
+
+-static inline unsigned long pud_bad(pud_t pud)
+-{
+- unsigned long val = __pud_val(pud);
+- val &= ~PTE_MASK;
+- val &= ~(_PAGE_USER | _PAGE_DIRTY);
+- return val & ~(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED);
+-}
++static inline unsigned long pud_bad(pud_t pud)
++{
++ return __pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
++}
++
++static inline unsigned long pmd_bad(pmd_t pmd)
++{
++ return __pmd_val(pmd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
++}
+
+ #define set_pte_at(_mm,addr,ptep,pteval) do { \
+ if (((_mm) != current->mm && (_mm) != &init_mm) || \
+@@ -402,8 +401,6 @@ static inline int pmd_large(pmd_t pte) {
+ #define pmd_present(x) (__pmd_val(x) & _PAGE_PRESENT)
+ #endif
+ #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
+-#define pmd_bad(x) ((__pmd_val(x) & ~(PTE_MASK | _PAGE_USER | _PAGE_PRESENT)) \
+- != (_KERNPG_TABLE & ~(_PAGE_USER | _PAGE_PRESENT)))
+ #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot)))
+ #define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_64.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_64.h 2008-12-01 11:32:38.000000000 +0100
+@@ -484,6 +484,14 @@ static inline void __mwait(unsigned long
+ : :"a" (eax), "c" (ecx));
+ }
+
++static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
++{
++ /* "mwait %eax,%ecx;" */
++ asm volatile(
++ "sti; .byte 0x0f,0x01,0xc9;"
++ : :"a" (eax), "c" (ecx));
++}
++
+ extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
+
+ #define stack_current() \
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/smp_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/smp_64.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/smp_64.h 2008-12-01 11:32:38.000000000 +0100
+@@ -88,11 +88,6 @@ extern u8 x86_cpu_to_log_apicid[NR_CPUS]
+ extern u8 bios_cpu_apicid[];
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+-static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
+-{
+- return cpus_addr(cpumask)[0];
+-}
+-
+ static inline int cpu_present_to_apicid(int mps_cpu)
+ {
+ if (mps_cpu < NR_CPUS)
+@@ -127,13 +122,6 @@ static __inline int logical_smp_processo
+ #define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
+ #else
+ #define cpu_physical_id(cpu) boot_cpu_id
+-static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
+- void *info, int retry, int wait)
+-{
+- /* Disable interrupts here? */
+- func(info);
+- return 0;
+-}
+ #endif /* !CONFIG_SMP */
+ #endif
+
+Index: head-2008-12-01/kernel/kexec.c
+===================================================================
+--- head-2008-12-01.orig/kernel/kexec.c 2008-12-01 11:23:01.000000000 +0100
++++ head-2008-12-01/kernel/kexec.c 2008-12-01 11:32:38.000000000 +0100
+@@ -372,7 +372,7 @@ static struct page *kimage_alloc_pages(g
+ if (limit == ~0UL)
+ address_bits = BITS_PER_LONG;
+ else
+- address_bits = long_log2(limit);
++ address_bits = ilog2(limit);
+
+ if (xen_limit_pages_to_max_mfn(pages, order, address_bits) < 0) {
+ __free_pages(pages, order);
+Index: head-2008-12-01/net/core/dev.c
+===================================================================
+--- head-2008-12-01.orig/net/core/dev.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/net/core/dev.c 2008-12-01 11:32:38.000000000 +0100
+@@ -1751,10 +1751,10 @@ inline int skb_checksum_setup(struct sk_
+ goto out;
+ switch (skb->nh.iph->protocol) {
+ case IPPROTO_TCP:
+- skb->csum = offsetof(struct tcphdr, check);
++ skb->csum_offset = offsetof(struct tcphdr, check);
+ break;
+ case IPPROTO_UDP:
+- skb->csum = offsetof(struct udphdr, check);
++ skb->csum_offset = offsetof(struct udphdr, check);
+ break;
+ default:
+ if (net_ratelimit())
+@@ -1763,7 +1763,7 @@ inline int skb_checksum_setup(struct sk_
+ " %d packet", skb->nh.iph->protocol);
+ goto out;
+ }
+- if ((skb->h.raw + skb->csum + 2) > skb->tail)
++ if ((skb->h.raw + skb->csum_offset + 2) > skb->tail)
+ goto out;
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->proto_csum_blank = 0;
--- /dev/null
+From: www.kernel.org
+Subject: Linux 2.6.21
+Patch-mainline: 2.6.21
+
+Automatically created from "patches.kernel.org/patch-2.6.21" by xen-port-patches.py
+
+Acked-by: jbeulich@novell.com
+
+---
+ arch/x86/Kconfig | 4
+ arch/x86/ia32/ia32entry-xen.S | 5
+ arch/x86/kernel/Makefile | 4
+ arch/x86/kernel/acpi/sleep_64-xen.c | 6
+ arch/x86/kernel/apic_32-xen.c | 65 ----
+ arch/x86/kernel/cpu/common-xen.c | 14
+ arch/x86/kernel/e820_32-xen.c | 18 -
+ arch/x86/kernel/e820_64-xen.c | 40 ++
+ arch/x86/kernel/entry_32-xen.S | 80 +++--
+ arch/x86/kernel/entry_64-xen.S | 3
+ arch/x86/kernel/genapic_64-xen.c | 4
+ arch/x86/kernel/head64-xen.c | 8
+ arch/x86/kernel/head_32-xen.S | 9
+ arch/x86/kernel/io_apic_32-xen.c | 43 +-
+ arch/x86/kernel/io_apic_64-xen.c | 414 +++++++++++++-------------
+ arch/x86/kernel/irq_32-xen.c | 22 +
+ arch/x86/kernel/irq_64-xen.c | 13
+ arch/x86/kernel/microcode-xen.c | 2
+ arch/x86/kernel/mpparse_32-xen.c | 4
+ arch/x86/kernel/mpparse_64-xen.c | 6
+ arch/x86/kernel/pci-dma-xen.c | 2
+ arch/x86/kernel/pcspeaker.c | 5
+ arch/x86/kernel/process_32-xen.c | 42 +-
+ arch/x86/kernel/process_64-xen.c | 13
+ arch/x86/kernel/setup_32-xen.c | 46 --
+ arch/x86/kernel/setup_64-xen.c | 184 +----------
+ arch/x86/kernel/smp_32-xen.c | 5
+ arch/x86/kernel/time_32-xen.c | 279 +----------------
+ arch/x86/kernel/traps_32-xen.c | 27 +
+ arch/x86/kernel/vsyscall_64-xen.c | 127 ++++---
+ arch/x86/mm/fault_32-xen.c | 44 --
+ arch/x86/mm/fault_64-xen.c | 39 --
+ arch/x86/mm/highmem_32-xen.c | 9
+ arch/x86/mm/init_32-xen.c | 2
+ arch/x86/mm/init_64-xen.c | 24 +
+ arch/x86/mm/pageattr_64-xen.c | 6
+ arch/x86/mm/pgtable_32-xen.c | 28 +
+ drivers/acpi/processor_extcntl.c | 18 -
+ drivers/char/tpm/tpm_xen.c | 5
+ drivers/pci/msi-xen.c | 196 +++---------
+ drivers/xen/balloon/sysfs.c | 1
+ drivers/xen/blkback/xenbus.c | 4
+ drivers/xen/blkfront/blkfront.c | 1
+ drivers/xen/blktap/xenbus.c | 4
+ drivers/xen/core/evtchn.c | 4
+ drivers/xen/core/smpboot.c | 22 -
+ drivers/xen/fbfront/xenfb.c | 1
+ drivers/xen/fbfront/xenkbd.c | 1
+ drivers/xen/netback/xenbus.c | 4
+ drivers/xen/netfront/netfront.c | 49 +--
+ drivers/xen/pciback/xenbus.c | 1
+ drivers/xen/pcifront/xenbus.c | 1
+ drivers/xen/scsiback/xenbus.c | 1
+ drivers/xen/scsifront/xenbus.c | 1
+ drivers/xen/tpmback/common.h | 4
+ drivers/xen/tpmback/interface.c | 5
+ drivers/xen/tpmback/tpmback.c | 16 -
+ drivers/xen/tpmback/xenbus.c | 5
+ drivers/xen/xenbus/xenbus_probe.c | 17 -
+ drivers/xen/xenbus/xenbus_probe.h | 4
+ drivers/xen/xenbus/xenbus_probe_backend.c | 8
+ drivers/xen/xenoprof/xenoprofile.c | 2
+ include/asm-x86/i8253.h | 4
+ include/asm-x86/mach-xen/asm/desc_32.h | 2
+ include/asm-x86/mach-xen/asm/dma-mapping_64.h | 4
+ include/asm-x86/mach-xen/asm/hypervisor.h | 15
+ include/asm-x86/mach-xen/asm/io_32.h | 6
+ include/asm-x86/mach-xen/asm/io_64.h | 8
+ include/asm-x86/mach-xen/asm/mmu_context_32.h | 10
+ include/asm-x86/mach-xen/asm/pgalloc_32.h | 21 +
+ include/asm-x86/mach-xen/asm/pgtable_32.h | 25 +
+ include/asm-x86/mach-xen/asm/pgtable_64.h | 9
+ include/asm-x86/mach-xen/asm/processor_32.h | 6
+ include/asm-x86/mach-xen/asm/segment_32.h | 23 +
+ include/asm-x86/mach-xen/asm/smp_32.h | 5
+ include/asm-x86/mach-xen/asm/smp_64.h | 3
+ include/xen/xenbus.h | 24 +
+ lib/swiotlb-xen.c | 19 -
+ 78 files changed, 946 insertions(+), 1259 deletions(-)
+
+--- a/arch/x86/ia32/ia32entry-xen.S
++++ b/arch/x86/ia32/ia32entry-xen.S
+@@ -465,7 +465,7 @@ ia32_sys_call_table:
+ .quad sys32_vm86_warning /* vm86old */
+ .quad compat_sys_wait4
+ .quad sys_swapoff /* 115 */
+- .quad sys32_sysinfo
++ .quad compat_sys_sysinfo
+ .quad sys32_ipc
+ .quad sys_fsync
+ .quad stub32_sigreturn
+@@ -510,7 +510,7 @@ ia32_sys_call_table:
+ .quad sys_sched_yield
+ .quad sys_sched_get_priority_max
+ .quad sys_sched_get_priority_min /* 160 */
+- .quad sys_sched_rr_get_interval
++ .quad sys32_sched_rr_get_interval
+ .quad compat_sys_nanosleep
+ .quad sys_mremap
+ .quad sys_setresuid16
+@@ -668,4 +668,5 @@ ia32_sys_call_table:
+ .quad compat_sys_vmsplice
+ .quad compat_sys_move_pages
+ .quad sys_getcpu
++ .quad sys_epoll_pwait
+ ia32_syscall_end:
+--- a/arch/x86/Kconfig
++++ b/arch/x86/Kconfig
+@@ -50,13 +50,15 @@ config GENERIC_CMOS_UPDATE
+
+ config CLOCKSOURCE_WATCHDOG
+ def_bool y
++ depends on !X86_XEN
+
+ config GENERIC_CLOCKEVENTS
+ def_bool y
++ depends on !X86_XEN
+
+ config GENERIC_CLOCKEVENTS_BROADCAST
+ def_bool y
+- depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
++ depends on X86_64 || (X86_32 && X86_LOCAL_APIC && !X86_XEN)
+
+ config LOCKDEP_SUPPORT
+ def_bool y
+--- a/arch/x86/kernel/acpi/sleep_64-xen.c
++++ b/arch/x86/kernel/acpi/sleep_64-xen.c
+@@ -59,7 +59,7 @@ unsigned long acpi_wakeup_address = 0;
+ unsigned long acpi_video_flags;
+ extern char wakeup_start, wakeup_end;
+
+-extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
++extern unsigned long acpi_copy_wakeup_routine(unsigned long);
+
+ static pgd_t low_ptr;
+
+@@ -67,8 +67,10 @@ static void init_low_mapping(void)
+ {
+ pgd_t *slot0 = pgd_offset(current->mm, 0UL);
+ low_ptr = *slot0;
++ /* FIXME: We're playing with the current task's page tables here, which
++ * is potentially dangerous on SMP systems.
++ */
+ set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET));
+- WARN_ON(num_online_cpus() != 1);
+ local_flush_tlb();
+ }
+ #endif
+--- a/arch/x86/kernel/apic_32-xen.c
++++ b/arch/x86/kernel/apic_32-xen.c
+@@ -25,6 +25,8 @@
+ #include <linux/kernel_stat.h>
+ #include <linux/sysdev.h>
+ #include <linux/cpu.h>
++#include <linux/clockchips.h>
++#include <linux/acpi_pmtmr.h>
+ #include <linux/module.h>
+
+ #include <asm/atomic.h>
+@@ -56,83 +58,26 @@ static cpumask_t timer_bcast_ipi;
+ */
+
+ /*
+- * Debug level
++ * Debug level, exported for io_apic.c
+ */
+ int apic_verbosity;
+
+ #ifndef CONFIG_XEN
+ static int modern_apic(void)
+ {
+- unsigned int lvr, version;
+ /* AMD systems use old APIC versions, so check the CPU */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
+- boot_cpu_data.x86 >= 0xf)
++ boot_cpu_data.x86 >= 0xf)
+ return 1;
+- lvr = apic_read(APIC_LVR);
+- version = GET_APIC_VERSION(lvr);
+- return version >= 0x14;
++ return lapic_get_version() >= 0x14;
+ }
+ #endif /* !CONFIG_XEN */
+
+-/*
+- * 'what should we do if we get a hw irq event on an illegal vector'.
+- * each architecture has to answer this themselves.
+- */
+-void ack_bad_irq(unsigned int irq)
+-{
+- printk("unexpected IRQ trap at vector %02x\n", irq);
+- /*
+- * Currently unexpected vectors happen only on SMP and APIC.
+- * We _must_ ack these because every local APIC has only N
+- * irq slots per priority level, and a 'hanging, unacked' IRQ
+- * holds up an irq slot - in excessive cases (when multiple
+- * unexpected vectors occur) that might lock up the APIC
+- * completely.
+- * But only ack when the APIC is enabled -AK
+- */
+- if (cpu_has_apic)
+- ack_APIC_irq();
+-}
+-
+ int get_physical_broadcast(void)
+ {
+ return 0xff;
+ }
+
+-#ifndef CONFIG_XEN
+-#ifndef CONFIG_SMP
+-static void up_apic_timer_interrupt_call(void)
+-{
+- int cpu = smp_processor_id();
+-
+- /*
+- * the NMI deadlock-detector uses this.
+- */
+- per_cpu(irq_stat, cpu).apic_timer_irqs++;
+-
+- smp_local_timer_interrupt();
+-}
+-#endif
+-
+-void smp_send_timer_broadcast_ipi(void)
+-{
+- cpumask_t mask;
+-
+- cpus_and(mask, cpu_online_map, timer_bcast_ipi);
+- if (!cpus_empty(mask)) {
+-#ifdef CONFIG_SMP
+- send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
+-#else
+- /*
+- * We can directly call the apic timer interrupt handler
+- * in UP case. Minus all irq related functions
+- */
+- up_apic_timer_interrupt_call();
+-#endif
+- }
+-}
+-#endif
+-
+ int setup_profiling_timer(unsigned int multiplier)
+ {
+ return -EINVAL;
+--- a/arch/x86/kernel/cpu/common-xen.c
++++ b/arch/x86/kernel/cpu/common-xen.c
+@@ -610,7 +610,7 @@ void __init early_cpu_init(void)
+ struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
+ {
+ memset(regs, 0, sizeof(struct pt_regs));
+- regs->xgs = __KERNEL_PDA;
++ regs->xfs = __KERNEL_PDA;
+ return regs;
+ }
+
+@@ -667,12 +667,12 @@ struct i386_pda boot_pda = {
+ .pcurrent = &init_task,
+ };
+
+-static inline void set_kernel_gs(void)
++static inline void set_kernel_fs(void)
+ {
+- /* Set %gs for this CPU's PDA. Memory clobber is to create a
++ /* Set %fs for this CPU's PDA. Memory clobber is to create a
+ barrier with respect to any PDA operations, so the compiler
+ doesn't move any before here. */
+- asm volatile ("mov %0, %%gs" : : "r" (__KERNEL_PDA) : "memory");
++ asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_PDA) : "memory");
+ }
+
+ /* Initialize the CPU's GDT and PDA. The boot CPU does this for
+@@ -730,7 +730,7 @@ void __cpuinit cpu_set_gdt(int cpu)
+ }
+ BUG_ON(HYPERVISOR_set_gdt(frames, (cpu_gdt_descr->size + 1) / 8));
+
+- set_kernel_gs();
++ set_kernel_fs();
+ }
+
+ /* Common CPU init for both boot and secondary CPUs */
+@@ -775,8 +775,8 @@ static void __cpuinit _cpu_init(int cpu,
+ __set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);
+ #endif
+
+- /* Clear %fs. */
+- asm volatile ("mov %0, %%fs" : : "r" (0));
++ /* Clear %gs. */
++ asm volatile ("mov %0, %%gs" : : "r" (0));
+
+ /* Clear all 6 debug registers: */
+ set_debugreg(0, 0);
+--- a/arch/x86/kernel/e820_32-xen.c
++++ b/arch/x86/kernel/e820_32-xen.c
+@@ -14,6 +14,7 @@
+ #include <asm/pgtable.h>
+ #include <asm/page.h>
+ #include <asm/e820.h>
++#include <asm/setup.h>
+ #include <xen/interface/memory.h>
+
+ #ifdef CONFIG_EFI
+@@ -157,21 +158,22 @@ static struct resource standard_io_resou
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO
+ } };
+
+-static int romsignature(const unsigned char *x)
++#define ROMSIGNATURE 0xaa55
++
++static int __init romsignature(const unsigned char *rom)
+ {
+ unsigned short sig;
+- int ret = 0;
+- if (probe_kernel_address((const unsigned short *)x, sig) == 0)
+- ret = (sig == 0xaa55);
+- return ret;
++
++ return probe_kernel_address((const unsigned short *)rom, sig) == 0 &&
++ sig == ROMSIGNATURE;
+ }
+
+ static int __init romchecksum(unsigned char *rom, unsigned long length)
+ {
+- unsigned char *p, sum = 0;
++ unsigned char sum;
+
+- for (p = rom; p < rom + length; p++)
+- sum += *p;
++ for (sum = 0; length; length--)
++ sum += *rom++;
+ return sum == 0;
+ }
+
+--- a/arch/x86/kernel/e820_64-xen.c
++++ b/arch/x86/kernel/e820_64-xen.c
+@@ -88,6 +88,13 @@ static inline int bad_addr(unsigned long
+ return 1;
+ }
+
++#ifdef CONFIG_NUMA
++ /* NUMA memory to node map */
++ if (last >= nodemap_addr && addr < nodemap_addr + nodemap_size) {
++ *addrp = nodemap_addr + nodemap_size;
++ return 1;
++ }
++#endif
+ /* XXX ramdisk image here? */
+ #else
+ if (last < (table_end<<PAGE_SHIFT)) {
+@@ -213,6 +220,37 @@ unsigned long __init e820_end_of_ram(voi
+ }
+
+ /*
++ * Find the hole size in the range.
++ */
++unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
++{
++ unsigned long ram = 0;
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ unsigned long last, addr;
++
++ if (ei->type != E820_RAM ||
++ ei->addr+ei->size <= start ||
++ ei->addr >= end)
++ continue;
++
++ addr = round_up(ei->addr, PAGE_SIZE);
++ if (addr < start)
++ addr = start;
++
++ last = round_down(ei->addr + ei->size, PAGE_SIZE);
++ if (last >= end)
++ last = end;
++
++ if (last > addr)
++ ram += last - addr;
++ }
++ return ((end - start) - ram);
++}
++
++/*
+ * Mark e820 reserved areas as busy for the resource manager.
+ */
+ void __init e820_reserve_resources(struct e820entry *e820, int nr_map)
+@@ -738,7 +776,7 @@ static int __init parse_memmap_opt(char
+ }
+ early_param("memmap", parse_memmap_opt);
+
+-void finish_e820_parsing(void)
++void __init finish_e820_parsing(void)
+ {
+ if (userdef) {
+ printk(KERN_INFO "user-defined physical RAM map:\n");
+--- a/arch/x86/kernel/entry_32-xen.S
++++ b/arch/x86/kernel/entry_32-xen.S
+@@ -30,7 +30,7 @@
+ * 18(%esp) - %eax
+ * 1C(%esp) - %ds
+ * 20(%esp) - %es
+- * 24(%esp) - %gs
++ * 24(%esp) - %fs
+ * 28(%esp) - orig_eax
+ * 2C(%esp) - %eip
+ * 30(%esp) - %cs
+@@ -102,9 +102,9 @@ NMI_MASK = 0x80000000
+
+ #define SAVE_ALL \
+ cld; \
+- pushl %gs; \
++ pushl %fs; \
+ CFI_ADJUST_CFA_OFFSET 4;\
+- /*CFI_REL_OFFSET gs, 0;*/\
++ /*CFI_REL_OFFSET fs, 0;*/\
+ pushl %es; \
+ CFI_ADJUST_CFA_OFFSET 4;\
+ /*CFI_REL_OFFSET es, 0;*/\
+@@ -136,7 +136,7 @@ NMI_MASK = 0x80000000
+ movl %edx, %ds; \
+ movl %edx, %es; \
+ movl $(__KERNEL_PDA), %edx; \
+- movl %edx, %gs
++ movl %edx, %fs
+
+ #define RESTORE_INT_REGS \
+ popl %ebx; \
+@@ -169,9 +169,9 @@ NMI_MASK = 0x80000000
+ 2: popl %es; \
+ CFI_ADJUST_CFA_OFFSET -4;\
+ /*CFI_RESTORE es;*/\
+-3: popl %gs; \
++3: popl %fs; \
+ CFI_ADJUST_CFA_OFFSET -4;\
+- /*CFI_RESTORE gs;*/\
++ /*CFI_RESTORE fs;*/\
+ .pushsection .fixup,"ax"; \
+ 4: movl $0,(%esp); \
+ jmp 1b; \
+@@ -230,6 +230,7 @@ ENTRY(ret_from_fork)
+ CFI_ADJUST_CFA_OFFSET -4
+ jmp syscall_exit
+ CFI_ENDPROC
++END(ret_from_fork)
+
+ /*
+ * Return to user mode is not as complex as all this looks,
+@@ -261,6 +262,7 @@ ENTRY(resume_userspace)
+ # int/exception return?
+ jne work_pending
+ jmp restore_all
++END(ret_from_exception)
+
+ #ifdef CONFIG_PREEMPT
+ ENTRY(resume_kernel)
+@@ -275,6 +277,7 @@ need_resched:
+ jz restore_all
+ call preempt_schedule_irq
+ jmp need_resched
++END(resume_kernel)
+ #endif
+ CFI_ENDPROC
+
+@@ -352,16 +355,17 @@ sysenter_past_esp:
+ movl PT_OLDESP(%esp), %ecx
+ xorl %ebp,%ebp
+ TRACE_IRQS_ON
+-1: mov PT_GS(%esp), %gs
++1: mov PT_FS(%esp), %fs
+ ENABLE_INTERRUPTS_SYSEXIT
+ CFI_ENDPROC
+ .pushsection .fixup,"ax"
+-2: movl $0,PT_GS(%esp)
++2: movl $0,PT_FS(%esp)
+ jmp 1b
+ .section __ex_table,"a"
+ .align 4
+ .long 1b,2b
+ .popsection
++ENDPROC(sysenter_entry)
+
+ # pv sysenter call handler stub
+ ENTRY(sysenter_entry_pv)
+@@ -533,6 +537,7 @@ hypervisor_iret:
+ jmp hypercall_page + (__HYPERVISOR_iret * 32)
+ #endif
+ CFI_ENDPROC
++ENDPROC(system_call)
+
+ # perform work that needs to be done immediately before resumption
+ ALIGN
+@@ -578,6 +583,7 @@ work_notifysig_v86:
+ xorl %edx, %edx
+ call do_notify_resume
+ jmp resume_userspace_sig
++END(work_pending)
+
+ # perform syscall exit tracing
+ ALIGN
+@@ -593,6 +599,7 @@ syscall_trace_entry:
+ cmpl $(nr_syscalls), %eax
+ jnae syscall_call
+ jmp syscall_exit
++END(syscall_trace_entry)
+
+ # perform syscall exit tracing
+ ALIGN
+@@ -606,6 +613,7 @@ syscall_exit_work:
+ movl $1, %edx
+ call do_syscall_trace
+ jmp resume_userspace
++END(syscall_exit_work)
+ CFI_ENDPROC
+
+ RING0_INT_FRAME # can't unwind into user space anyway
+@@ -616,16 +624,18 @@ syscall_fault:
+ GET_THREAD_INFO(%ebp)
+ movl $-EFAULT,PT_EAX(%esp)
+ jmp resume_userspace
++END(syscall_fault)
+
+ syscall_badsys:
+ movl $-ENOSYS,PT_EAX(%esp)
+ jmp resume_userspace
++END(syscall_badsys)
+ CFI_ENDPROC
+
+ #ifndef CONFIG_XEN
+ #define FIXUP_ESPFIX_STACK \
+ /* since we are on a wrong stack, we cant make it a C code :( */ \
+- movl %gs:PDA_cpu, %ebx; \
++ movl %fs:PDA_cpu, %ebx; \
+ PER_CPU(cpu_gdt_descr, %ebx); \
+ movl GDS_address(%ebx), %ebx; \
+ GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah); \
+@@ -656,9 +666,9 @@ syscall_badsys:
+ ENTRY(interrupt)
+ .text
+
+-vector=0
+ ENTRY(irq_entries_start)
+ RING0_INT_FRAME
++vector=0
+ .rept NR_IRQS
+ ALIGN
+ .if vector
+@@ -667,11 +677,16 @@ ENTRY(irq_entries_start)
+ 1: pushl $~(vector)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp common_interrupt
+-.data
++ .previous
+ .long 1b
+-.text
++ .text
+ vector=vector+1
+ .endr
++END(irq_entries_start)
++
++.previous
++END(interrupt)
++.previous
+
+ /*
+ * the CPU automatically disables interrupts when executing an IRQ vector,
+@@ -684,6 +699,7 @@ common_interrupt:
+ movl %esp,%eax
+ call do_IRQ
+ jmp ret_from_intr
++ENDPROC(common_interrupt)
+ CFI_ENDPROC
+
+ #define BUILD_INTERRUPT(name, nr) \
+@@ -696,10 +712,16 @@ ENTRY(name) \
+ movl %esp,%eax; \
+ call smp_/**/name; \
+ jmp ret_from_intr; \
+- CFI_ENDPROC
++ CFI_ENDPROC; \
++ENDPROC(name)
+
+ /* The include is where all of the SMP etc. interrupts come from */
+ #include "entry_arch.h"
++
++/* This alternate entry is needed because we hijack the apic LVTT */
++#if defined(CONFIG_VMI) && defined(CONFIG_X86_LOCAL_APIC)
++BUILD_INTERRUPT(apic_vmi_timer_interrupt,LOCAL_TIMER_VECTOR)
++#endif
+ #else
+ #define UNWIND_ESPFIX_STACK
+ #endif
+@@ -710,7 +732,7 @@ KPROBE_ENTRY(page_fault)
+ CFI_ADJUST_CFA_OFFSET 4
+ ALIGN
+ error_code:
+- /* the function address is in %gs's slot on the stack */
++ /* the function address is in %fs's slot on the stack */
+ pushl %es
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET es, 0*/
+@@ -739,20 +761,20 @@ error_code:
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebx, 0
+ cld
+- pushl %gs
++ pushl %fs
+ CFI_ADJUST_CFA_OFFSET 4
+- /*CFI_REL_OFFSET gs, 0*/
++ /*CFI_REL_OFFSET fs, 0*/
+ movl $(__KERNEL_PDA), %ecx
+- movl %ecx, %gs
++ movl %ecx, %fs
+ UNWIND_ESPFIX_STACK
+ popl %ecx
+ CFI_ADJUST_CFA_OFFSET -4
+ /*CFI_REGISTER es, ecx*/
+- movl PT_GS(%esp), %edi # get the function address
++ movl PT_FS(%esp), %edi # get the function address
+ movl PT_ORIG_EAX(%esp), %edx # get the error code
+ movl $-1, PT_ORIG_EAX(%esp) # no syscall to restart
+- mov %ecx, PT_GS(%esp)
+- /*CFI_REL_OFFSET gs, ES*/
++ mov %ecx, PT_FS(%esp)
++ /*CFI_REL_OFFSET fs, ES*/
+ movl $(__USER_DS), %ecx
+ movl %ecx, %ds
+ movl %ecx, %es
+@@ -839,7 +861,7 @@ critical_fixup_table:
+ .byte 0x18 # pop %eax
+ .byte 0x1c # pop %ds
+ .byte 0x20 # pop %es
+- .byte 0x24,0x24 # pop %gs
++ .byte 0x24,0x24 # pop %fs
+ .byte 0x28,0x28,0x28 # add $4,%esp
+ .byte 0x2c # iret
+ .byte 0xff,0xff,0xff,0xff # movb $1,1(%esi)
+@@ -905,6 +927,7 @@ ENTRY(coprocessor_error)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(coprocessor_error)
+
+ ENTRY(simd_coprocessor_error)
+ RING0_INT_FRAME
+@@ -914,6 +937,7 @@ ENTRY(simd_coprocessor_error)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(simd_coprocessor_error)
+
+ ENTRY(device_not_available)
+ RING0_INT_FRAME
+@@ -936,6 +960,7 @@ device_available_emulate:
+ call math_state_restore
+ jmp ret_from_exception
+ CFI_ENDPROC
++END(device_not_available)
+
+ #ifndef CONFIG_XEN
+ /*
+@@ -1097,10 +1122,12 @@ ENTRY(native_iret)
+ .align 4
+ .long 1b,iret_exc
+ .previous
++END(native_iret)
+
+ ENTRY(native_irq_enable_sysexit)
+ sti
+ sysexit
++END(native_irq_enable_sysexit)
+ #endif
+
+ KPROBE_ENTRY(int3)
+@@ -1123,6 +1150,7 @@ ENTRY(overflow)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(overflow)
+
+ ENTRY(bounds)
+ RING0_INT_FRAME
+@@ -1132,6 +1160,7 @@ ENTRY(bounds)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(bounds)
+
+ ENTRY(invalid_op)
+ RING0_INT_FRAME
+@@ -1141,6 +1170,7 @@ ENTRY(invalid_op)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(invalid_op)
+
+ ENTRY(coprocessor_segment_overrun)
+ RING0_INT_FRAME
+@@ -1150,6 +1180,7 @@ ENTRY(coprocessor_segment_overrun)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(coprocessor_segment_overrun)
+
+ ENTRY(invalid_TSS)
+ RING0_EC_FRAME
+@@ -1157,6 +1188,7 @@ ENTRY(invalid_TSS)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(invalid_TSS)
+
+ ENTRY(segment_not_present)
+ RING0_EC_FRAME
+@@ -1164,6 +1196,7 @@ ENTRY(segment_not_present)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(segment_not_present)
+
+ ENTRY(stack_segment)
+ RING0_EC_FRAME
+@@ -1171,6 +1204,7 @@ ENTRY(stack_segment)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(stack_segment)
+
+ KPROBE_ENTRY(general_protection)
+ RING0_EC_FRAME
+@@ -1186,6 +1220,7 @@ ENTRY(alignment_check)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(alignment_check)
+
+ ENTRY(divide_error)
+ RING0_INT_FRAME
+@@ -1195,6 +1230,7 @@ ENTRY(divide_error)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(divide_error)
+
+ #ifdef CONFIG_X86_MCE
+ ENTRY(machine_check)
+@@ -1205,6 +1241,7 @@ ENTRY(machine_check)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(machine_check)
+ #endif
+
+ #ifndef CONFIG_XEN
+@@ -1224,6 +1261,7 @@ ENTRY(fixup_4gb_segment)
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
++END(spurious_interrupt_bug)
+
+ ENTRY(kernel_thread_helper)
+ pushl $0 # fake return address for unwinder
+--- a/arch/x86/kernel/entry_64-xen.S
++++ b/arch/x86/kernel/entry_64-xen.S
+@@ -629,6 +629,9 @@ END(invalidate_interrupt\num)
+ ENTRY(call_function_interrupt)
+ apicinterrupt CALL_FUNCTION_VECTOR,smp_call_function_interrupt
+ END(call_function_interrupt)
++ENTRY(irq_move_cleanup_interrupt)
++ apicinterrupt IRQ_MOVE_CLEANUP_VECTOR,smp_irq_move_cleanup_interrupt
++END(irq_move_cleanup_interrupt)
+ #endif
+
+ ENTRY(apic_timer_interrupt)
+--- a/arch/x86/kernel/genapic_64-xen.c
++++ b/arch/x86/kernel/genapic_64-xen.c
+@@ -65,8 +65,8 @@ void __init clustered_apic_check(void)
+ * Some x86_64 machines use physical APIC mode regardless of how many
+ * procs/clusters are present (x86_64 ES7000 is an example).
+ */
+- if (acpi_fadt.revision > FADT2_REVISION_ID)
+- if (acpi_fadt.force_apic_physical_destination_mode) {
++ if (acpi_gbl_FADT.header.revision > FADT2_REVISION_ID)
++ if (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL) {
+ genapic = &apic_cluster;
+ goto print;
+ }
+--- a/arch/x86/kernel/head_32-xen.S
++++ b/arch/x86/kernel/head_32-xen.S
+@@ -27,6 +27,7 @@
+ #define X86_CAPABILITY new_cpu_data+CPUINFO_x86_capability
+ #define X86_VENDOR_ID new_cpu_data+CPUINFO_x86_vendor_id
+
++.section .text.head,"ax",@progbits
+ #define VIRT_ENTRY_OFFSET 0x0
+ .org VIRT_ENTRY_OFFSET
+ ENTRY(startup_32)
+@@ -60,11 +61,11 @@ ENTRY(startup_32)
+
+ movb $1,X86_HARD_MATH
+
+- xorl %eax,%eax # Clear FS
+- movl %eax,%fs
++ xorl %eax,%eax # Clear GS
++ movl %eax,%gs
+
+ movl $(__KERNEL_PDA),%eax
+- mov %eax,%gs
++ mov %eax,%fs
+
+ cld # gcc2 wants the direction flag cleared at all times
+
+@@ -75,7 +76,7 @@ ENTRY(startup_32)
+ * Point the GDT at this CPU's PDA. This will be
+ * cpu_gdt_table and boot_pda.
+ */
+-setup_pda:
++ENTRY(setup_pda)
+ /* get the PDA pointer */
+ movl $boot_pda, %eax
+
+--- a/arch/x86/kernel/head64-xen.c
++++ b/arch/x86/kernel/head64-xen.c
+@@ -45,8 +45,6 @@ static void __init clear_bss(void)
+ #define OLD_CL_BASE_ADDR 0x90000
+ #define OLD_CL_OFFSET 0x90022
+
+-extern char saved_command_line[];
+-
+ static void __init copy_bootdata(char *real_mode_data)
+ {
+ #ifndef CONFIG_XEN
+@@ -62,14 +60,14 @@ static void __init copy_bootdata(char *r
+ new_data = OLD_CL_BASE_ADDR + * (u16 *) OLD_CL_OFFSET;
+ }
+ command_line = (char *) ((u64)(new_data));
+- memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
++ memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+ #else
+ int max_cmdline;
+
+ if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
+ max_cmdline = COMMAND_LINE_SIZE;
+- memcpy(saved_command_line, xen_start_info->cmd_line, max_cmdline);
+- saved_command_line[max_cmdline-1] = '\0';
++ memcpy(boot_command_line, xen_start_info->cmd_line, max_cmdline);
++ boot_command_line[max_cmdline-1] = '\0';
+ #endif
+ }
+
+--- a/arch/x86/kernel/io_apic_32-xen.c
++++ b/arch/x86/kernel/io_apic_32-xen.c
+@@ -167,7 +167,7 @@ static inline void io_apic_write(unsigne
+ */
+ static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
+ {
+- volatile struct io_apic *io_apic = io_apic_base(apic);
++ volatile struct io_apic __iomem *io_apic = io_apic_base(apic);
+ if (sis_apic_bug)
+ writel(reg, &io_apic->index);
+ writel(value, &io_apic->data);
+@@ -392,7 +392,7 @@ static void set_ioapic_affinity_irq(unsi
+ break;
+ entry = irq_2_pin + entry->next;
+ }
+- set_native_irq_info(irq, cpumask);
++ irq_desc[irq].affinity = cpumask;
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+
+@@ -531,8 +531,8 @@ static void do_irq_balance(void)
+ package_index = CPU_TO_PACKAGEINDEX(i);
+ for (j = 0; j < NR_IRQS; j++) {
+ unsigned long value_now, delta;
+- /* Is this an active IRQ? */
+- if (!irq_desc[j].action)
++ /* Is this an active IRQ or balancing disabled ? */
++ if (!irq_desc[j].action || irq_balancing_disabled(j))
+ continue;
+ if ( package_index == i )
+ IRQ_DELTA(package_index,j) = 0;
+@@ -785,7 +785,7 @@ failed:
+ return 0;
+ }
+
+-int __init irqbalance_disable(char *str)
++int __devinit irqbalance_disable(char *str)
+ {
+ irqbalance_disabled = 1;
+ return 1;
+@@ -1329,11 +1329,9 @@ static void ioapic_register_intr(int irq
+ trigger == IOAPIC_LEVEL)
+ set_irq_chip_and_handler_name(irq, &ioapic_chip,
+ handle_fasteoi_irq, "fasteoi");
+- else {
+- irq_desc[irq].status |= IRQ_DELAYED_DISABLE;
++ else
+ set_irq_chip_and_handler_name(irq, &ioapic_chip,
+ handle_edge_irq, "edge");
+- }
+ set_intr_gate(vector, interrupt[irq]);
+ }
+ #else
+@@ -1407,7 +1405,6 @@ static void __init setup_IO_APIC_irqs(vo
+ }
+ spin_lock_irqsave(&ioapic_lock, flags);
+ __ioapic_write_entry(apic, pin, entry);
+- set_native_irq_info(irq, TARGET_CPUS);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+ }
+@@ -1638,7 +1635,7 @@ void /*__init*/ print_local_APIC(void *
+ v = apic_read(APIC_LVR);
+ printk(KERN_INFO "... APIC VERSION: %08x\n", v);
+ ver = GET_APIC_VERSION(v);
+- maxlvt = get_maxlvt();
++ maxlvt = lapic_get_maxlvt();
+
+ v = apic_read(APIC_TASKPRI);
+ printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
+@@ -1976,7 +1973,7 @@ static void __init setup_ioapic_ids_from
+ #endif
+
+ #ifndef CONFIG_XEN
+-static int no_timer_check __initdata;
++int no_timer_check __initdata;
+
+ static int __init notimercheck(char *s)
+ {
+@@ -2369,7 +2366,7 @@ static inline void __init check_timer(vo
+
+ disable_8259A_irq(0);
+ set_irq_chip_and_handler_name(0, &lapic_chip, handle_fasteoi_irq,
+- "fasteio");
++ "fasteoi");
+ apic_write_around(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
+ enable_8259A_irq(0);
+
+@@ -2662,7 +2659,7 @@ static void set_msi_irq_affinity(unsigne
+ msg.address_lo |= MSI_ADDR_DEST_ID(dest);
+
+ write_msi_msg(irq, &msg);
+- set_native_irq_info(irq, mask);
++ irq_desc[irq].affinity = mask;
+ }
+ #endif /* CONFIG_SMP */
+
+@@ -2681,25 +2678,32 @@ static struct irq_chip msi_chip = {
+ .retrigger = ioapic_retrigger_irq,
+ };
+
+-int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev)
++int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
+ {
+ struct msi_msg msg;
+- int ret;
++ int irq, ret;
++ irq = create_irq();
++ if (irq < 0)
++ return irq;
++
++ set_irq_msi(irq, desc);
+ ret = msi_compose_msg(dev, irq, &msg);
+- if (ret < 0)
++ if (ret < 0) {
++ destroy_irq(irq);
+ return ret;
++ }
+
+ write_msi_msg(irq, &msg);
+
+ set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq,
+ "edge");
+
+- return 0;
++ return irq;
+ }
+
+ void arch_teardown_msi_irq(unsigned int irq)
+ {
+- return;
++ destroy_irq(irq);
+ }
+
+ #endif /* CONFIG_PCI_MSI */
+@@ -2739,7 +2743,7 @@ static void set_ht_irq_affinity(unsigned
+ dest = cpu_mask_to_apicid(mask);
+
+ target_ht_irq(irq, dest);
+- set_native_irq_info(irq, mask);
++ irq_desc[irq].affinity = mask;
+ }
+ #endif
+
+@@ -2947,7 +2951,6 @@ int io_apic_set_pci_routing (int ioapic,
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ __ioapic_write_entry(ioapic, pin, entry);
+- set_native_irq_info(irq, TARGET_CPUS);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ return 0;
+--- a/arch/x86/kernel/io_apic_64-xen.c
++++ b/arch/x86/kernel/io_apic_64-xen.c
+@@ -36,6 +36,7 @@
+ #include <acpi/acpi_bus.h>
+ #endif
+
++#include <asm/idle.h>
+ #include <asm/io.h>
+ #include <asm/smp.h>
+ #include <asm/desc.h>
+@@ -47,7 +48,20 @@
+ #include <asm/msidef.h>
+ #include <asm/hypertransport.h>
+
+-static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result);
++struct irq_cfg {
++#ifndef CONFIG_XEN
++ cpumask_t domain;
++ cpumask_t old_domain;
++#endif
++ unsigned move_cleanup_count;
++ u8 vector;
++ u8 move_in_progress : 1;
++};
++
++/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
++struct irq_cfg irq_cfg[NR_IRQS] __read_mostly;
++
++static int assign_irq_vector(int irq, cpumask_t mask);
+
+ #define __apicdebuginit __init
+
+@@ -89,7 +103,7 @@ int nr_ioapic_registers[MAX_IO_APICS];
+ * Rough estimation of how many shared IRQs there are, can
+ * be changed anytime.
+ */
+-#define MAX_PLUS_SHARED_IRQS NR_IRQ_VECTORS
++#define MAX_PLUS_SHARED_IRQS NR_IRQS
+ #define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS)
+
+ /*
+@@ -262,21 +276,19 @@ static void __target_IO_APIC_irq(unsigne
+
+ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
+ {
++ struct irq_cfg *cfg = irq_cfg + irq;
+ unsigned long flags;
+ unsigned int dest;
+ cpumask_t tmp;
+- int vector;
+
+ cpus_and(tmp, mask, cpu_online_map);
+ if (cpus_empty(tmp))
+- tmp = TARGET_CPUS;
+-
+- cpus_and(mask, tmp, CPU_MASK_ALL);
++ return;
+
+- vector = assign_irq_vector(irq, mask, &tmp);
+- if (vector < 0)
++ if (assign_irq_vector(irq, mask))
+ return;
+
++ cpus_and(tmp, cfg->domain, mask);
+ dest = cpu_mask_to_apicid(tmp);
+
+ /*
+@@ -285,8 +297,8 @@ static void set_ioapic_affinity_irq(unsi
+ dest = SET_APIC_LOGICAL_ID(dest);
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+- __target_IO_APIC_irq(irq, dest, vector);
+- set_native_irq_info(irq, mask);
++ __target_IO_APIC_irq(irq, dest, cfg->vector);
++ irq_desc[irq].affinity = mask;
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+ #endif
+@@ -332,11 +344,11 @@ static void add_pin_to_irq(unsigned int
+ reg = io_apic_read(entry->apic, 0x10 + R + pin*2); \
+ reg ACTION; \
+ io_apic_modify(entry->apic, reg); \
++ FINAL; \
+ if (!entry->next) \
+ break; \
+ entry = irq_2_pin + entry->next; \
+ } \
+- FINAL; \
+ }
+
+ #define DO_ACTION(name,R,ACTION, FINAL) \
+@@ -669,77 +681,62 @@ static int pin_2_irq(int idx, int apic,
+ return irq;
+ }
+
+-static inline int IO_APIC_irq_trigger(int irq)
+-{
+- int apic, idx, pin;
+-
+- for (apic = 0; apic < nr_ioapics; apic++) {
+- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+- idx = find_irq_entry(apic,pin,mp_INT);
+- if ((idx != -1) && (irq == pin_2_irq(idx,apic,pin)))
+- return irq_trigger(idx);
+- }
+- }
+- /*
+- * nonexistent IRQs are edge default
+- */
+- return 0;
+-}
+-
+-/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
+-static u8 irq_vector[NR_IRQ_VECTORS] __read_mostly;
+-
+-static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
++static int __assign_irq_vector(int irq, cpumask_t mask)
+ {
+- int vector;
+ struct physdev_irq irq_op;
++ struct irq_cfg *cfg;
+
+- BUG_ON((unsigned)irq >= NR_IRQ_VECTORS);
++ BUG_ON((unsigned)irq >= NR_IRQS);
+
+ if (irq < PIRQ_BASE || irq - PIRQ_BASE > NR_PIRQS)
+ return -EINVAL;
+
+- cpus_and(*result, mask, cpu_online_map);
++ cfg = &irq_cfg[irq];
++
++ if ((cfg->move_in_progress) || cfg->move_cleanup_count)
++ return -EBUSY;
+
+- if (irq_vector[irq] > 0)
+- return irq_vector[irq];
++ if (cfg->vector)
++ return 0;
+
+ irq_op.irq = irq;
+ if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op))
+ return -ENOSPC;
+
+- vector = irq_op.vector;
+- irq_vector[irq] = vector;
++ cfg->vector = irq_op.vector;
+
+- return vector;
++ return 0;
+ }
+
+-static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
++static int assign_irq_vector(int irq, cpumask_t mask)
+ {
+- int vector;
++ int err;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vector_lock, flags);
+- vector = __assign_irq_vector(irq, mask, result);
++ err = __assign_irq_vector(irq, mask);
+ spin_unlock_irqrestore(&vector_lock, flags);
+- return vector;
++ return err;
+ }
+
+ #ifndef CONFIG_XEN
+ static void __clear_irq_vector(int irq)
+ {
++ struct irq_cfg *cfg;
+ cpumask_t mask;
+ int cpu, vector;
+
+- BUG_ON(!irq_vector[irq]);
++ BUG_ON((unsigned)irq >= NR_IRQS);
++ cfg = &irq_cfg[irq];
++ BUG_ON(!cfg->vector);
+
+- vector = irq_vector[irq];
+- cpus_and(mask, irq_domain[irq], cpu_online_map);
++ vector = cfg->vector;
++ cpus_and(mask, cfg->domain, cpu_online_map);
+ for_each_cpu_mask(cpu, mask)
+ per_cpu(vector_irq, cpu)[vector] = -1;
+
+- irq_vector[irq] = 0;
+- irq_domain[irq] = CPU_MASK_NONE;
++ cfg->vector = 0;
++ cfg->domain = CPU_MASK_NONE;
+ }
+
+ void __setup_vector_irq(int cpu)
+@@ -749,10 +746,10 @@ void __setup_vector_irq(int cpu)
+ int irq, vector;
+
+ /* Mark the inuse vectors */
+- for (irq = 0; irq < NR_IRQ_VECTORS; ++irq) {
+- if (!cpu_isset(cpu, irq_domain[irq]))
++ for (irq = 0; irq < NR_IRQS; ++irq) {
++ if (!cpu_isset(cpu, irq_cfg[irq].domain))
+ continue;
+- vector = irq_vector[irq];
++ vector = irq_cfg[irq].vector;
+ per_cpu(vector_irq, cpu)[vector] = irq;
+ }
+ /* Mark the free vectors */
+@@ -760,41 +757,49 @@ void __setup_vector_irq(int cpu)
+ irq = per_cpu(vector_irq, cpu)[vector];
+ if (irq < 0)
+ continue;
+- if (!cpu_isset(cpu, irq_domain[irq]))
++ if (!cpu_isset(cpu, irq_cfg[irq].domain))
+ per_cpu(vector_irq, cpu)[vector] = -1;
+ }
+ }
+
+-extern void (*interrupt[NR_IRQS])(void);
+-
+ static struct irq_chip ioapic_chip;
+
+-#define IOAPIC_AUTO -1
+-#define IOAPIC_EDGE 0
+-#define IOAPIC_LEVEL 1
+-
+-static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
++static void ioapic_register_intr(int irq, unsigned long trigger)
+ {
+- if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+- trigger == IOAPIC_LEVEL)
++ if (trigger)
+ set_irq_chip_and_handler_name(irq, &ioapic_chip,
+ handle_fasteoi_irq, "fasteoi");
+- else {
+- irq_desc[irq].status |= IRQ_DELAYED_DISABLE;
++ else
+ set_irq_chip_and_handler_name(irq, &ioapic_chip,
+ handle_edge_irq, "edge");
+- }
+ }
+ #else
+-#define ioapic_register_intr(irq, vector, trigger) evtchn_register_pirq(irq)
++#define ioapic_register_intr(irq, trigger) evtchn_register_pirq(irq)
+ #endif /* !CONFIG_XEN */
+
+-static void __init setup_IO_APIC_irq(int apic, int pin, int idx, int irq)
++static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq,
++ int trigger, int polarity)
+ {
++ struct irq_cfg *cfg = irq_cfg + irq;
+ struct IO_APIC_route_entry entry;
+- int vector;
+- unsigned long flags;
++ cpumask_t mask;
++
++ if (!IO_APIC_IRQ(irq))
++ return;
+
++ mask = TARGET_CPUS;
++ if (assign_irq_vector(irq, mask))
++ return;
++
++#ifndef CONFIG_XEN
++ cpus_and(mask, cfg->domain, mask);
++#endif
++
++ apic_printk(APIC_VERBOSE,KERN_DEBUG
++ "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> "
++ "IRQ %d Mode:%i Active:%i)\n",
++ apic, mp_ioapics[apic].mpc_apicid, pin, cfg->vector,
++ irq, trigger, polarity);
+
+ /*
+ * add it to the IO-APIC irq-routing table:
+@@ -803,41 +808,23 @@ static void __init setup_IO_APIC_irq(int
+
+ entry.delivery_mode = INT_DELIVERY_MODE;
+ entry.dest_mode = INT_DEST_MODE;
++ entry.dest = cpu_mask_to_apicid(mask);
+ entry.mask = 0; /* enable IRQ */
+- entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
+-
+- entry.trigger = irq_trigger(idx);
+- entry.polarity = irq_polarity(idx);
++ entry.trigger = trigger;
++ entry.polarity = polarity;
++ entry.vector = cfg->vector;
+
+- if (irq_trigger(idx)) {
+- entry.trigger = 1;
++ /* Mask level triggered irqs.
++ * Use IRQ_DELAYED_DISABLE for edge triggered irqs.
++ */
++ if (trigger)
+ entry.mask = 1;
+- entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
+- }
+-
+- if (/* !apic && */ !IO_APIC_IRQ(irq))
+- return;
+
+- if (IO_APIC_IRQ(irq)) {
+- cpumask_t mask;
+- vector = assign_irq_vector(irq, TARGET_CPUS, &mask);
+- if (vector < 0)
+- return;
+-
+- entry.dest.logical.logical_dest = cpu_mask_to_apicid(mask);
+- entry.vector = vector;
+-
+- ioapic_register_intr(irq, vector, IOAPIC_AUTO);
+- if (!apic && (irq < 16))
+- disable_8259A_irq(irq);
+- }
++ ioapic_register_intr(irq, trigger);
++ if (irq < 16)
++ disable_8259A_irq(irq);
+
+ ioapic_write_entry(apic, pin, entry);
+-
+- spin_lock_irqsave(&ioapic_lock, flags);
+- set_native_irq_info(irq, TARGET_CPUS);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
+-
+ }
+
+ static void __init setup_IO_APIC_irqs(void)
+@@ -862,8 +849,8 @@ static void __init setup_IO_APIC_irqs(vo
+ irq = pin_2_irq(idx, apic, pin);
+ add_pin_to_irq(irq, apic, pin);
+
+- setup_IO_APIC_irq(apic, pin, idx, irq);
+-
++ setup_IO_APIC_irq(apic, pin, irq,
++ irq_trigger(idx), irq_polarity(idx));
+ }
+ }
+
+@@ -894,7 +881,7 @@ static void __init setup_ExtINT_IRQ0_pin
+ */
+ entry.dest_mode = INT_DEST_MODE;
+ entry.mask = 0; /* unmask IRQ now */
+- entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
++ entry.dest = cpu_mask_to_apicid(TARGET_CPUS);
+ entry.delivery_mode = INT_DELIVERY_MODE;
+ entry.polarity = 0;
+ entry.trigger = 0;
+@@ -994,18 +981,17 @@ void __apicdebuginit print_IO_APIC(void)
+
+ printk(KERN_DEBUG ".... IRQ redirection table:\n");
+
+- printk(KERN_DEBUG " NR Log Phy Mask Trig IRR Pol"
+- " Stat Dest Deli Vect: \n");
++ printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol"
++ " Stat Dmod Deli Vect: \n");
+
+ for (i = 0; i <= reg_01.bits.entries; i++) {
+ struct IO_APIC_route_entry entry;
+
+ entry = ioapic_read_entry(apic, i);
+
+- printk(KERN_DEBUG " %02x %03X %02X ",
++ printk(KERN_DEBUG " %02x %03X ",
+ i,
+- entry.dest.logical.logical_dest,
+- entry.dest.physical.physical_dest
++ entry.dest
+ );
+
+ printk("%1d %1d %1d %1d %1d %1d %1d %02X\n",
+@@ -1269,8 +1255,7 @@ void disable_IO_APIC(void)
+ entry.dest_mode = 0; /* Physical */
+ entry.delivery_mode = dest_ExtINT; /* ExtInt */
+ entry.vector = 0;
+- entry.dest.physical.physical_dest =
+- GET_APIC_ID(apic_read(APIC_ID));
++ entry.dest = GET_APIC_ID(apic_read(APIC_ID));
+
+ /*
+ * Add it to the IO-APIC irq-routing table:
+@@ -1355,16 +1340,15 @@ static unsigned int startup_ioapic_irq(u
+
+ static int ioapic_retrigger_irq(unsigned int irq)
+ {
++ struct irq_cfg *cfg = &irq_cfg[irq];
+ cpumask_t mask;
+- unsigned vector;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vector_lock, flags);
+- vector = irq_vector[irq];
+ cpus_clear(mask);
+- cpu_set(first_cpu(irq_domain[irq]), mask);
++ cpu_set(first_cpu(cfg->domain), mask);
+
+- send_IPI_mask(mask, vector);
++ send_IPI_mask(mask, cfg->vector);
+ spin_unlock_irqrestore(&vector_lock, flags);
+
+ return 1;
+@@ -1379,8 +1363,68 @@ static int ioapic_retrigger_irq(unsigned
+ * races.
+ */
+
++#ifdef CONFIG_SMP
++asmlinkage void smp_irq_move_cleanup_interrupt(void)
++{
++ unsigned vector, me;
++ ack_APIC_irq();
++ exit_idle();
++ irq_enter();
++
++ me = smp_processor_id();
++ for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
++ unsigned int irq;
++ struct irq_desc *desc;
++ struct irq_cfg *cfg;
++ irq = __get_cpu_var(vector_irq)[vector];
++ if (irq >= NR_IRQS)
++ continue;
++
++ desc = irq_desc + irq;
++ cfg = irq_cfg + irq;
++ spin_lock(&desc->lock);
++ if (!cfg->move_cleanup_count)
++ goto unlock;
++
++ if ((vector == cfg->vector) && cpu_isset(me, cfg->domain))
++ goto unlock;
++
++ __get_cpu_var(vector_irq)[vector] = -1;
++ cfg->move_cleanup_count--;
++unlock:
++ spin_unlock(&desc->lock);
++ }
++
++ irq_exit();
++}
++
++static void irq_complete_move(unsigned int irq)
++{
++ struct irq_cfg *cfg = irq_cfg + irq;
++ unsigned vector, me;
++
++ if (likely(!cfg->move_in_progress))
++ return;
++
++ vector = ~get_irq_regs()->orig_rax;
++ me = smp_processor_id();
++ if ((vector == cfg->vector) &&
++ cpu_isset(smp_processor_id(), cfg->domain)) {
++ cpumask_t cleanup_mask;
++
++ cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map);
++ cfg->move_cleanup_count = cpus_weight(cleanup_mask);
++ send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
++ cfg->move_in_progress = 0;
++ }
++}
++#else
++static inline void irq_complete_move(unsigned int irq) {}
++#endif
++
+ static void ack_apic_edge(unsigned int irq)
+ {
++ irq_complete_move(irq);
+ move_native_irq(irq);
+ ack_APIC_irq();
+ }
+@@ -1389,6 +1433,7 @@ static void ack_apic_level(unsigned int
+ {
+ int do_unmask_irq = 0;
+
++ irq_complete_move(irq);
+ #if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
+ /* If we are moving the irq we need to mask it */
+ if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) {
+@@ -1440,7 +1485,7 @@ static inline void init_IO_APIC_traps(vo
+ */
+ for (irq = 0; irq < NR_IRQS ; irq++) {
+ int tmp = irq;
+- if (IO_APIC_IRQ(tmp) && !irq_vector[tmp]) {
++ if (IO_APIC_IRQ(tmp) && !irq_cfg[tmp].vector) {
+ /*
+ * Hmm.. We don't have an entry for this,
+ * so default to an old-fashioned 8259
+@@ -1538,7 +1583,7 @@ static inline void unlock_ExtINT_logic(v
+
+ entry1.dest_mode = 0; /* physical delivery */
+ entry1.mask = 0; /* unmask IRQ now */
+- entry1.dest.physical.physical_dest = hard_smp_processor_id();
++ entry1.dest = hard_smp_processor_id();
+ entry1.delivery_mode = dest_ExtINT;
+ entry1.polarity = entry0.polarity;
+ entry1.trigger = 0;
+@@ -1582,15 +1627,14 @@ static inline void unlock_ExtINT_logic(v
+ */
+ static inline void check_timer(void)
+ {
++ struct irq_cfg *cfg = irq_cfg + 0;
+ int apic1, pin1, apic2, pin2;
+- int vector;
+- cpumask_t mask;
+
+ /*
+ * get/set the timer IRQ vector:
+ */
+ disable_8259A_irq(0);
+- vector = assign_irq_vector(0, TARGET_CPUS, &mask);
++ assign_irq_vector(0, TARGET_CPUS);
+
+ /*
+ * Subtle, code in do_timer_interrupt() expects an AEOI
+@@ -1610,7 +1654,7 @@ static inline void check_timer(void)
+ apic2 = ioapic_i8259.apic;
+
+ apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
+- vector, apic1, pin1, apic2, pin2);
++ cfg->vector, apic1, pin1, apic2, pin2);
+
+ if (pin1 != -1) {
+ /*
+@@ -1641,7 +1685,7 @@ static inline void check_timer(void)
+ /*
+ * legacy devices should be connected to IO APIC #0
+ */
+- setup_ExtINT_IRQ0_pin(apic2, pin2, vector);
++ setup_ExtINT_IRQ0_pin(apic2, pin2, cfg->vector);
+ if (timer_irq_works()) {
+ apic_printk(APIC_VERBOSE," works.\n");
+ nmi_watchdog_default();
+@@ -1666,14 +1710,14 @@ static inline void check_timer(void)
+
+ disable_8259A_irq(0);
+ irq_desc[0].chip = &lapic_irq_type;
+- apic_write(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
++ apic_write(APIC_LVT0, APIC_DM_FIXED | cfg->vector); /* Fixed mode */
+ enable_8259A_irq(0);
+
+ if (timer_irq_works()) {
+ apic_printk(APIC_VERBOSE," works.\n");
+ return;
+ }
+- apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
++ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector);
+ apic_printk(APIC_VERBOSE," failed.\n");
+
+ apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as ExtINT IRQ...");
+@@ -1828,19 +1872,16 @@ int create_irq(void)
+ /* Allocate an unused irq */
+ int irq;
+ int new;
+- int vector = 0;
+ unsigned long flags;
+- cpumask_t mask;
+
+ irq = -ENOSPC;
+ spin_lock_irqsave(&vector_lock, flags);
+ for (new = (NR_IRQS - 1); new >= 0; new--) {
+ if (platform_legacy_irq(new))
+ continue;
+- if (irq_vector[new] != 0)
++ if (irq_cfg[new].vector != 0)
+ continue;
+- vector = __assign_irq_vector(new, TARGET_CPUS, &mask);
+- if (likely(vector > 0))
++ if (__assign_irq_vector(new, TARGET_CPUS) == 0)
+ irq = new;
+ break;
+ }
+@@ -1871,12 +1912,15 @@ void destroy_irq(unsigned int irq)
+ #if defined(CONFIG_PCI_MSI) && !defined(CONFIG_XEN)
+ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
+ {
+- int vector;
++ struct irq_cfg *cfg = irq_cfg + irq;
++ int err;
+ unsigned dest;
+ cpumask_t tmp;
+
+- vector = assign_irq_vector(irq, TARGET_CPUS, &tmp);
+- if (vector >= 0) {
++ tmp = TARGET_CPUS;
++ err = assign_irq_vector(irq, tmp);
++ if (!err) {
++ cpus_and(tmp, cfg->domain, tmp);
+ dest = cpu_mask_to_apicid(tmp);
+
+ msg->address_hi = MSI_ADDR_BASE_HI;
+@@ -1896,40 +1940,38 @@ static int msi_compose_msg(struct pci_de
+ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
+ MSI_DATA_DELIVERY_FIXED:
+ MSI_DATA_DELIVERY_LOWPRI) |
+- MSI_DATA_VECTOR(vector);
++ MSI_DATA_VECTOR(cfg->vector);
+ }
+- return vector;
++ return err;
+ }
+
+ #ifdef CONFIG_SMP
+ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
+ {
++ struct irq_cfg *cfg = irq_cfg + irq;
+ struct msi_msg msg;
+ unsigned int dest;
+ cpumask_t tmp;
+- int vector;
+
+ cpus_and(tmp, mask, cpu_online_map);
+ if (cpus_empty(tmp))
+- tmp = TARGET_CPUS;
+-
+- cpus_and(mask, tmp, CPU_MASK_ALL);
++ return;
+
+- vector = assign_irq_vector(irq, mask, &tmp);
+- if (vector < 0)
++ if (assign_irq_vector(irq, mask))
+ return;
+
++ cpus_and(tmp, cfg->domain, mask);
+ dest = cpu_mask_to_apicid(tmp);
+
+ read_msi_msg(irq, &msg);
+
+ msg.data &= ~MSI_DATA_VECTOR_MASK;
+- msg.data |= MSI_DATA_VECTOR(vector);
++ msg.data |= MSI_DATA_VECTOR(cfg->vector);
+ msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
+ msg.address_lo |= MSI_ADDR_DEST_ID(dest);
+
+ write_msi_msg(irq, &msg);
+- set_native_irq_info(irq, mask);
++ irq_desc[irq].affinity = mask;
+ }
+ #endif /* CONFIG_SMP */
+
+@@ -1948,24 +1990,31 @@ static struct irq_chip msi_chip = {
+ .retrigger = ioapic_retrigger_irq,
+ };
+
+-int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev)
++int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
+ {
+ struct msi_msg msg;
+- int ret;
++ int irq, ret;
++ irq = create_irq();
++ if (irq < 0)
++ return irq;
++
++ set_irq_msi(irq, desc);
+ ret = msi_compose_msg(dev, irq, &msg);
+- if (ret < 0)
++ if (ret < 0) {
++ destroy_irq(irq);
+ return ret;
++ }
+
+ write_msi_msg(irq, &msg);
+
+ set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq, "edge");
+
+- return 0;
++ return irq;
+ }
+
+ void arch_teardown_msi_irq(unsigned int irq)
+ {
+- return;
++ destroy_irq(irq);
+ }
+
+ #endif /* CONFIG_PCI_MSI */
+@@ -1993,24 +2042,22 @@ static void target_ht_irq(unsigned int i
+
+ static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
+ {
++ struct irq_cfg *cfg = irq_cfg + irq;
+ unsigned int dest;
+ cpumask_t tmp;
+- int vector;
+
+ cpus_and(tmp, mask, cpu_online_map);
+ if (cpus_empty(tmp))
+- tmp = TARGET_CPUS;
+-
+- cpus_and(mask, tmp, CPU_MASK_ALL);
++ return;
+
+- vector = assign_irq_vector(irq, mask, &tmp);
+- if (vector < 0)
++ if (assign_irq_vector(irq, mask))
+ return;
+
++ cpus_and(tmp, cfg->domain, mask);
+ dest = cpu_mask_to_apicid(tmp);
+
+- target_ht_irq(irq, dest, vector);
+- set_native_irq_info(irq, mask);
++ target_ht_irq(irq, dest, cfg->vector);
++ irq_desc[irq].affinity = mask;
+ }
+ #endif
+
+@@ -2027,14 +2074,17 @@ static struct irq_chip ht_irq_chip = {
+
+ int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
+ {
+- int vector;
++ struct irq_cfg *cfg = irq_cfg + irq;
++ int err;
+ cpumask_t tmp;
+
+- vector = assign_irq_vector(irq, TARGET_CPUS, &tmp);
+- if (vector >= 0) {
++ tmp = TARGET_CPUS;
++ err = assign_irq_vector(irq, tmp);
++ if (!err) {
+ struct ht_irq_msg msg;
+ unsigned dest;
+
++ cpus_and(tmp, cfg->domain, tmp);
+ dest = cpu_mask_to_apicid(tmp);
+
+ msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest);
+@@ -2042,7 +2092,7 @@ int arch_setup_ht_irq(unsigned int irq,
+ msg.address_lo =
+ HT_IRQ_LOW_BASE |
+ HT_IRQ_LOW_DEST_ID(dest) |
+- HT_IRQ_LOW_VECTOR(vector) |
++ HT_IRQ_LOW_VECTOR(cfg->vector) |
+ ((INT_DEST_MODE == 0) ?
+ HT_IRQ_LOW_DM_PHYSICAL :
+ HT_IRQ_LOW_DM_LOGICAL) |
+@@ -2057,7 +2107,7 @@ int arch_setup_ht_irq(unsigned int irq,
+ set_irq_chip_and_handler_name(irq, &ht_irq_chip,
+ handle_edge_irq, "edge");
+ }
+- return vector;
++ return err;
+ }
+ #endif /* CONFIG_HT_IRQ */
+
+@@ -2082,13 +2132,8 @@ int __init io_apic_get_redir_entries (in
+ }
+
+
+-int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low)
++int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int polarity)
+ {
+- struct IO_APIC_route_entry entry;
+- unsigned long flags;
+- int vector;
+- cpumask_t mask;
+-
+ if (!IO_APIC_IRQ(irq)) {
+ apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
+ ioapic);
+@@ -2101,42 +2146,7 @@ int io_apic_set_pci_routing (int ioapic,
+ if (irq >= 16)
+ add_pin_to_irq(irq, ioapic, pin);
+
+-
+- vector = assign_irq_vector(irq, TARGET_CPUS, &mask);
+- if (vector < 0)
+- return vector;
+-
+- /*
+- * Generate a PCI IRQ routing entry and program the IOAPIC accordingly.
+- * Note that we mask (disable) IRQs now -- these get enabled when the
+- * corresponding device driver registers for this IRQ.
+- */
+-
+- memset(&entry,0,sizeof(entry));
+-
+- entry.delivery_mode = INT_DELIVERY_MODE;
+- entry.dest_mode = INT_DEST_MODE;
+- entry.dest.logical.logical_dest = cpu_mask_to_apicid(mask);
+- entry.trigger = edge_level;
+- entry.polarity = active_high_low;
+- entry.mask = 1; /* Disabled (masked) */
+- entry.vector = vector & 0xff;
+-
+- apic_printk(APIC_VERBOSE,KERN_DEBUG "IOAPIC[%d]: Set PCI routing entry (%d-%d -> 0x%x -> "
+- "IRQ %d Mode:%i Active:%i)\n", ioapic,
+- mp_ioapics[ioapic].mpc_apicid, pin, entry.vector, irq,
+- edge_level, active_high_low);
+-
+- ioapic_register_intr(irq, entry.vector, edge_level);
+-
+- if (!ioapic && (irq < 16))
+- disable_8259A_irq(irq);
+-
+- ioapic_write_entry(ioapic, pin, entry);
+-
+- spin_lock_irqsave(&ioapic_lock, flags);
+- set_native_irq_info(irq, TARGET_CPUS);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ setup_IO_APIC_irq(ioapic, pin, irq, triggering, polarity);
+
+ return 0;
+ }
+@@ -2169,8 +2179,10 @@ void __init setup_ioapic_dest(void)
+ * when you have too many devices, because at that time only boot
+ * cpu is online.
+ */
+- if(!irq_vector[irq])
+- setup_IO_APIC_irq(ioapic, pin, irq_entry, irq);
++ if (!irq_cfg[irq].vector)
++ setup_IO_APIC_irq(ioapic, pin, irq,
++ irq_trigger(irq_entry),
++ irq_polarity(irq_entry));
+ else
+ set_ioapic_affinity_irq(irq, TARGET_CPUS);
+ }
+--- a/arch/x86/kernel/irq_32-xen.c
++++ b/arch/x86/kernel/irq_32-xen.c
+@@ -10,7 +10,6 @@
+ * io_apic.c.)
+ */
+
+-#include <asm/uaccess.h>
+ #include <linux/module.h>
+ #include <linux/seq_file.h>
+ #include <linux/interrupt.h>
+@@ -19,19 +18,34 @@
+ #include <linux/cpu.h>
+ #include <linux/delay.h>
+
++#include <asm/apic.h>
++#include <asm/uaccess.h>
++
+ DEFINE_PER_CPU(irq_cpustat_t, irq_stat) ____cacheline_internodealigned_in_smp;
+ EXPORT_PER_CPU_SYMBOL(irq_stat);
+
+-#ifndef CONFIG_X86_LOCAL_APIC
+ /*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves.
+ */
+ void ack_bad_irq(unsigned int irq)
+ {
+- printk("unexpected IRQ trap at vector %02x\n", irq);
+-}
++ printk(KERN_ERR "unexpected IRQ trap at vector %02x\n", irq);
++
++#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
++ /*
++ * Currently unexpected vectors happen only on SMP and APIC.
++ * We _must_ ack these because every local APIC has only N
++ * irq slots per priority level, and a 'hanging, unacked' IRQ
++ * holds up an irq slot - in excessive cases (when multiple
++ * unexpected vectors occur) that might lock up the APIC
++ * completely.
++ * But only ack when the APIC is enabled -AK
++ */
++ if (cpu_has_apic)
++ ack_APIC_irq();
+ #endif
++}
+
+ #ifdef CONFIG_4KSTACKS
+ /*
+--- a/arch/x86/kernel/irq_64-xen.c
++++ b/arch/x86/kernel/irq_64-xen.c
+@@ -18,6 +18,7 @@
+ #include <asm/uaccess.h>
+ #include <asm/io_apic.h>
+ #include <asm/idle.h>
++#include <asm/smp.h>
+
+ atomic_t irq_err_count;
+
+@@ -120,9 +121,15 @@ asmlinkage unsigned int do_IRQ(struct pt
+
+ if (likely(irq < NR_IRQS))
+ generic_handle_irq(irq);
+- else if (printk_ratelimit())
+- printk(KERN_EMERG "%s: %d.%d No irq handler for irq\n",
+- __func__, smp_processor_id(), irq);
++ else {
++#ifndef CONFIG_XEN
++ if (!disable_apic)
++ ack_APIC_irq();
++#endif
++ if (printk_ratelimit())
++ printk(KERN_EMERG "%s: %d.%d No irq handler for irq\n",
++ __func__, smp_processor_id(), irq);
++ }
+
+ /*irq_exit();*/
+
+--- a/arch/x86/kernel/Makefile
++++ b/arch/x86/kernel/Makefile
+@@ -124,7 +124,7 @@ ifeq ($(CONFIG_X86_64),y)
+ pci-dma_64-$(CONFIG_XEN) += pci-dma_32.o
+ endif
+
+-disabled-obj-$(CONFIG_XEN) := early-quirks.o i8253.o i8259_$(BITS).o reboot.o \
+- smpboot_$(BITS).o tsc_$(BITS).o
++disabled-obj-$(CONFIG_XEN) := early-quirks.o hpet.o i8253.o i8259_$(BITS).o reboot.o \
++ smpboot_$(BITS).o tsc_$(BITS).o tsc_sync.o
+ disabled-obj-$(CONFIG_XEN_UNPRIVILEGED_GUEST) += mpparse_64.o
+ %/head_$(BITS).o %/head_$(BITS).s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
+--- a/arch/x86/kernel/microcode-xen.c
++++ b/arch/x86/kernel/microcode-xen.c
+@@ -108,7 +108,7 @@ static ssize_t microcode_write (struct f
+ return ret;
+ }
+
+-static struct file_operations microcode_fops = {
++static const struct file_operations microcode_fops = {
+ .owner = THIS_MODULE,
+ .write = microcode_write,
+ .open = microcode_open,
+--- a/arch/x86/kernel/mpparse_32-xen.c
++++ b/arch/x86/kernel/mpparse_32-xen.c
+@@ -1079,7 +1079,7 @@ int mp_register_gsi(u32 gsi, int trigger
+ static int gsi_to_irq[MAX_GSI_NUM];
+
+ /* Don't set up the ACPI SCI because it's already set up */
+- if (acpi_fadt.sci_int == gsi)
++ if (acpi_gbl_FADT.sci_interrupt == gsi)
+ return gsi;
+
+ ioapic = mp_find_ioapic(gsi);
+@@ -1136,7 +1136,7 @@ int mp_register_gsi(u32 gsi, int trigger
+ /*
+ * Don't assign IRQ used by ACPI SCI
+ */
+- if (gsi == acpi_fadt.sci_int)
++ if (gsi == acpi_gbl_FADT.sci_interrupt)
+ gsi = pci_irq++;
+ gsi_to_irq[irq] = gsi;
+ } else {
+--- a/arch/x86/kernel/mpparse_64-xen.c
++++ b/arch/x86/kernel/mpparse_64-xen.c
+@@ -60,9 +60,9 @@ unsigned long mp_lapic_addr = 0;
+ /* Processor that is doing the boot up */
+ unsigned int boot_cpu_id = -1U;
+ /* Internal processor count */
+-unsigned int num_processors __initdata = 0;
++unsigned int num_processors __cpuinitdata = 0;
+
+-unsigned disabled_cpus __initdata;
++unsigned disabled_cpus __cpuinitdata;
+
+ /* Bitmask of physically existing CPUs */
+ physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
+@@ -808,7 +808,7 @@ int mp_register_gsi(u32 gsi, int trigger
+ return gsi;
+
+ /* Don't set up the ACPI SCI because it's already set up */
+- if (acpi_fadt.sci_int == gsi)
++ if (acpi_gbl_FADT.sci_interrupt == gsi)
+ return gsi;
+
+ ioapic = mp_find_ioapic(gsi);
+--- a/arch/x86/kernel/pci-dma-xen.c
++++ b/arch/x86/kernel/pci-dma-xen.c
+@@ -311,7 +311,7 @@ int dma_declare_coherent_memory(struct d
+ return DMA_MEMORY_IO;
+
+ free1_out:
+- kfree(dev->dma_mem->bitmap);
++ kfree(dev->dma_mem);
+ out:
+ if (mem_base)
+ iounmap(mem_base);
+--- a/arch/x86/kernel/pcspeaker.c
++++ b/arch/x86/kernel/pcspeaker.c
+@@ -7,6 +7,11 @@ static __init int add_pcspkr(void)
+ struct platform_device *pd;
+ int ret;
+
++#ifdef CONFIG_XEN
++ if (!is_initial_xendomain())
++ return 0;
++#endif
++
+ pd = platform_device_alloc("pcspkr", -1);
+ if (!pd)
+ return -ENOMEM;
+--- a/arch/x86/kernel/process_32-xen.c
++++ b/arch/x86/kernel/process_32-xen.c
+@@ -38,6 +38,7 @@
+ #include <linux/ptrace.h>
+ #include <linux/random.h>
+ #include <linux/personality.h>
++#include <linux/tick.h>
+
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -160,6 +161,7 @@ void cpu_idle(void)
+
+ /* endless idle loop with no priority at all */
+ while (1) {
++ tick_nohz_stop_sched_tick();
+ while (!need_resched()) {
+ void (*idle)(void);
+
+@@ -175,6 +177,7 @@ void cpu_idle(void)
+ __get_cpu_var(irq_stat).idle_timestamp = jiffies;
+ idle();
+ }
++ tick_nohz_restart_sched_tick();
+ preempt_enable_no_resched();
+ schedule();
+ preempt_disable();
+@@ -247,8 +250,8 @@ void show_regs(struct pt_regs * regs)
+ regs->eax,regs->ebx,regs->ecx,regs->edx);
+ printk("ESI: %08lx EDI: %08lx EBP: %08lx",
+ regs->esi, regs->edi, regs->ebp);
+- printk(" DS: %04x ES: %04x GS: %04x\n",
+- 0xffff & regs->xds,0xffff & regs->xes, 0xffff & regs->xgs);
++ printk(" DS: %04x ES: %04x FS: %04x\n",
++ 0xffff & regs->xds,0xffff & regs->xes, 0xffff & regs->xfs);
+
+ cr0 = read_cr0();
+ cr2 = read_cr2();
+@@ -279,7 +282,7 @@ int kernel_thread(int (*fn)(void *), voi
+
+ regs.xds = __USER_DS;
+ regs.xes = __USER_DS;
+- regs.xgs = __KERNEL_PDA;
++ regs.xfs = __KERNEL_PDA;
+ regs.orig_eax = -1;
+ regs.eip = (unsigned long) kernel_thread_helper;
+ regs.xcs = __KERNEL_CS | get_kernel_rpl();
+@@ -356,7 +359,7 @@ int copy_thread(int nr, unsigned long cl
+
+ p->thread.eip = (unsigned long) ret_from_fork;
+
+- savesegment(fs,p->thread.fs);
++ savesegment(gs,p->thread.gs);
+
+ tsk = current;
+ if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
+@@ -434,8 +437,8 @@ void dump_thread(struct pt_regs * regs,
+ dump->regs.eax = regs->eax;
+ dump->regs.ds = regs->xds;
+ dump->regs.es = regs->xes;
+- savesegment(fs,dump->regs.fs);
+- dump->regs.gs = regs->xgs;
++ dump->regs.fs = regs->xfs;
++ savesegment(gs,dump->regs.gs);
+ dump->regs.orig_eax = regs->orig_eax;
+ dump->regs.eip = regs->eip;
+ dump->regs.cs = regs->xcs;
+@@ -637,16 +640,6 @@ struct task_struct fastcall * __switch_t
+ prefetch(&next->i387.fxsave);
+
+ /*
+- * Restore %fs if needed.
+- *
+- * Glibc normally makes %fs be zero.
+- */
+- if (unlikely(next->fs))
+- loadsegment(fs, next->fs);
+-
+- write_pda(pcurrent, next_p);
+-
+- /*
+ * Now maybe handle debug registers
+ */
+ if (unlikely(task_thread_info(next_p)->flags & _TIF_WORK_CTXSW))
+@@ -654,6 +647,15 @@ struct task_struct fastcall * __switch_t
+
+ disable_tsc(prev_p, next_p);
+
++ /*
++ * Leave lazy mode, flushing any hypercalls made here.
++ * This must be done before restoring TLS segments so
++ * the GDT and LDT are properly updated, and must be
++ * done before math_state_restore, so the TS bit is up
++ * to date.
++ */
++ arch_leave_lazy_cpu_mode();
++
+ /* If the task has used fpu the last 5 timeslices, just do a full
+ * restore of the math state immediately to avoid the trap; the
+ * chances of needing FPU soon are obviously high now
+@@ -661,6 +663,14 @@ struct task_struct fastcall * __switch_t
+ if (next_p->fpu_counter > 5)
+ math_state_restore();
+
++ /*
++ * Restore %gs if needed (which is common)
++ */
++ if (prev->gs | next->gs)
++ loadsegment(gs, next->gs);
++
++ write_pda(pcurrent, next_p);
++
+ return prev_p;
+ }
+
+--- a/arch/x86/kernel/process_64-xen.c
++++ b/arch/x86/kernel/process_64-xen.c
+@@ -338,14 +338,17 @@ void load_gs_index(unsigned gs)
+ void flush_thread(void)
+ {
+ struct task_struct *tsk = current;
+- struct thread_info *t = current_thread_info();
+
+- if (t->flags & _TIF_ABI_PENDING) {
+- t->flags ^= (_TIF_ABI_PENDING | _TIF_IA32);
+- if (t->flags & _TIF_IA32)
++ if (test_tsk_thread_flag(tsk, TIF_ABI_PENDING)) {
++ clear_tsk_thread_flag(tsk, TIF_ABI_PENDING);
++ if (test_tsk_thread_flag(tsk, TIF_IA32)) {
++ clear_tsk_thread_flag(tsk, TIF_IA32);
++ } else {
++ set_tsk_thread_flag(tsk, TIF_IA32);
+ current_thread_info()->status |= TS_COMPAT;
++ }
+ }
+- t->flags &= ~_TIF_DEBUG;
++ clear_tsk_thread_flag(tsk, TIF_DEBUG);
+
+ tsk->thread.debugreg0 = 0;
+ tsk->thread.debugreg1 = 0;
+--- a/arch/x86/kernel/setup_32-xen.c
++++ b/arch/x86/kernel/setup_32-xen.c
+@@ -33,7 +33,6 @@
+ #include <linux/initrd.h>
+ #include <linux/bootmem.h>
+ #include <linux/seq_file.h>
+-#include <linux/platform_device.h>
+ #include <linux/console.h>
+ #include <linux/mca.h>
+ #include <linux/root_dev.h>
+@@ -148,7 +147,7 @@ unsigned long saved_videomode;
+ #define RAMDISK_PROMPT_FLAG 0x8000
+ #define RAMDISK_LOAD_FLAG 0x4000
+
+-static char command_line[COMMAND_LINE_SIZE];
++static char __initdata command_line[COMMAND_LINE_SIZE];
+
+ unsigned char __initdata boot_params[PARAM_SIZE];
+
+@@ -647,8 +646,8 @@ void __init setup_arch(char **cmdline_p)
+
+ if ((i = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
+ i = COMMAND_LINE_SIZE;
+- memcpy(saved_command_line, xen_start_info->cmd_line, i);
+- saved_command_line[i - 1] = '\0';
++ memcpy(boot_command_line, xen_start_info->cmd_line, i);
++ boot_command_line[i - 1] = '\0';
+ parse_early_param();
+
+ if (user_defined_memmap) {
+@@ -656,11 +655,19 @@ void __init setup_arch(char **cmdline_p)
+ print_memory_map("user");
+ }
+
+- strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
++ strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+ *cmdline_p = command_line;
+
+ max_low_pfn = setup_memory();
+
++#ifdef CONFIG_VMI
++ /*
++ * Must be after max_low_pfn is determined, and before kernel
++ * pagetables are setup.
++ */
++ vmi_init();
++#endif
++
+ /*
+ * NOTE: before this point _nobody_ is allowed to allocate
+ * any memory using the bootmem allocator. Although the
+@@ -823,7 +830,6 @@ void __init setup_arch(char **cmdline_p)
+ conswitchp = &dummy_con;
+ #endif
+ }
+- tsc_init();
+ }
+
+ static int
+@@ -833,31 +839,3 @@ xen_panic_event(struct notifier_block *t
+ /* we're never actually going to get here... */
+ return NOTIFY_DONE;
+ }
+-
+-static __init int add_pcspkr(void)
+-{
+- struct platform_device *pd;
+- int ret;
+-
+- if (!is_initial_xendomain())
+- return 0;
+-
+- pd = platform_device_alloc("pcspkr", -1);
+- if (!pd)
+- return -ENOMEM;
+-
+- ret = platform_device_add(pd);
+- if (ret)
+- platform_device_put(pd);
+-
+- return ret;
+-}
+-device_initcall(add_pcspkr);
+-
+-/*
+- * Local Variables:
+- * mode:c
+- * c-file-style:"k&r"
+- * c-basic-offset:8
+- * End:
+- */
+--- a/arch/x86/kernel/setup_64-xen.c
++++ b/arch/x86/kernel/setup_64-xen.c
+@@ -141,7 +141,7 @@ EXPORT_SYMBOL_GPL(edid_info);
+
+ extern int root_mountflags;
+
+-char command_line[COMMAND_LINE_SIZE];
++char __initdata command_line[COMMAND_LINE_SIZE];
+
+ struct resource standard_io_resources[] = {
+ { .name = "dma1", .start = 0x00, .end = 0x1f,
+@@ -179,134 +179,6 @@ struct resource code_resource = {
+ .flags = IORESOURCE_RAM,
+ };
+
+-#define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
+-
+-static struct resource system_rom_resource = {
+- .name = "System ROM",
+- .start = 0xf0000,
+- .end = 0xfffff,
+- .flags = IORESOURCE_ROM,
+-};
+-
+-static struct resource extension_rom_resource = {
+- .name = "Extension ROM",
+- .start = 0xe0000,
+- .end = 0xeffff,
+- .flags = IORESOURCE_ROM,
+-};
+-
+-static struct resource adapter_rom_resources[] = {
+- { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
+- .flags = IORESOURCE_ROM },
+- { .name = "Adapter ROM", .start = 0, .end = 0,
+- .flags = IORESOURCE_ROM },
+- { .name = "Adapter ROM", .start = 0, .end = 0,
+- .flags = IORESOURCE_ROM },
+- { .name = "Adapter ROM", .start = 0, .end = 0,
+- .flags = IORESOURCE_ROM },
+- { .name = "Adapter ROM", .start = 0, .end = 0,
+- .flags = IORESOURCE_ROM },
+- { .name = "Adapter ROM", .start = 0, .end = 0,
+- .flags = IORESOURCE_ROM }
+-};
+-
+-static struct resource video_rom_resource = {
+- .name = "Video ROM",
+- .start = 0xc0000,
+- .end = 0xc7fff,
+- .flags = IORESOURCE_ROM,
+-};
+-
+-static struct resource video_ram_resource = {
+- .name = "Video RAM area",
+- .start = 0xa0000,
+- .end = 0xbffff,
+- .flags = IORESOURCE_RAM,
+-};
+-
+-#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
+-
+-static int __init romchecksum(unsigned char *rom, unsigned long length)
+-{
+- unsigned char *p, sum = 0;
+-
+- for (p = rom; p < rom + length; p++)
+- sum += *p;
+- return sum == 0;
+-}
+-
+-static void __init probe_roms(void)
+-{
+- unsigned long start, length, upper;
+- unsigned char *rom;
+- int i;
+-
+-#ifdef CONFIG_XEN
+- /* Nothing to do if not running in dom0. */
+- if (!is_initial_xendomain())
+- return;
+-#endif
+-
+- /* video rom */
+- upper = adapter_rom_resources[0].start;
+- for (start = video_rom_resource.start; start < upper; start += 2048) {
+- rom = isa_bus_to_virt(start);
+- if (!romsignature(rom))
+- continue;
+-
+- video_rom_resource.start = start;
+-
+- /* 0 < length <= 0x7f * 512, historically */
+- length = rom[2] * 512;
+-
+- /* if checksum okay, trust length byte */
+- if (length && romchecksum(rom, length))
+- video_rom_resource.end = start + length - 1;
+-
+- request_resource(&iomem_resource, &video_rom_resource);
+- break;
+- }
+-
+- start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
+- if (start < upper)
+- start = upper;
+-
+- /* system rom */
+- request_resource(&iomem_resource, &system_rom_resource);
+- upper = system_rom_resource.start;
+-
+- /* check for extension rom (ignore length byte!) */
+- rom = isa_bus_to_virt(extension_rom_resource.start);
+- if (romsignature(rom)) {
+- length = extension_rom_resource.end - extension_rom_resource.start + 1;
+- if (romchecksum(rom, length)) {
+- request_resource(&iomem_resource, &extension_rom_resource);
+- upper = extension_rom_resource.start;
+- }
+- }
+-
+- /* check for adapter roms on 2k boundaries */
+- for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper;
+- start += 2048) {
+- rom = isa_bus_to_virt(start);
+- if (!romsignature(rom))
+- continue;
+-
+- /* 0 < length <= 0x7f * 512, historically */
+- length = rom[2] * 512;
+-
+- /* but accept any length that fits if checksum okay */
+- if (!length || start + length > upper || !romchecksum(rom, length))
+- continue;
+-
+- adapter_rom_resources[i].start = start;
+- adapter_rom_resources[i].end = start + length - 1;
+- request_resource(&iomem_resource, &adapter_rom_resources[i]);
+-
+- start = adapter_rom_resources[i++].end & ~2047UL;
+- }
+-}
+-
+ #ifdef CONFIG_PROC_VMCORE
+ /* elfcorehdr= specifies the location of elf core header
+ * stored by the crashed kernel. This option will be passed
+@@ -403,7 +275,7 @@ void __init setup_arch(char **cmdline_p)
+ #ifdef CONFIG_XEN
+ extern struct e820map machine_e820;
+
+- printk(KERN_INFO "Command line: %s\n", saved_command_line);
++ printk(KERN_INFO "Command line: %s\n", boot_command_line);
+
+ /* Register a call for panic conditions. */
+ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+@@ -430,7 +302,7 @@ void __init setup_arch(char **cmdline_p)
+
+ ARCH_SETUP
+ #else
+- printk(KERN_INFO "Command line: %s\n", saved_command_line);
++ printk(KERN_INFO "Command line: %s\n", boot_command_line);
+
+ ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
+ screen_info = SCREEN_INFO;
+@@ -461,7 +333,7 @@ void __init setup_arch(char **cmdline_p)
+
+ early_identify_cpu(&boot_cpu_data);
+
+- strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
++ strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+ *cmdline_p = command_line;
+
+ parse_early_param();
+@@ -531,6 +403,11 @@ void __init setup_arch(char **cmdline_p)
+ /* reserve ebda region */
+ if (ebda_addr)
+ reserve_bootmem_generic(ebda_addr, ebda_size);
++#ifdef CONFIG_NUMA
++ /* reserve nodemap region */
++ if (nodemap_addr)
++ reserve_bootmem_generic(nodemap_addr, nodemap_size);
++#endif
+
+ #ifdef CONFIG_SMP
+ /*
+@@ -731,10 +608,8 @@ void __init setup_arch(char **cmdline_p)
+ #endif
+
+ /*
+- * Request address space for all standard RAM and ROM resources
+- * and also for regions reported as reserved by the e820.
++ * We trust e820 completely. No explicit ROM probing in memory.
+ */
+- probe_roms();
+ #ifdef CONFIG_XEN
+ if (is_initial_xendomain())
+ e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
+@@ -743,8 +618,6 @@ void __init setup_arch(char **cmdline_p)
+ e820_mark_nosave_regions();
+ #endif
+
+- request_resource(&iomem_resource, &video_ram_resource);
+-
+ {
+ unsigned i;
+ /* request I/O space for devices used on all i[345]86 PCs */
+@@ -1321,7 +1194,8 @@ static int show_cpuinfo(struct seq_file
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
+- NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",
++ NULL, "fxsr_opt", "pdpe1gb", "rdtscp", NULL, "lm",
++ "3dnowext", "3dnow",
+
+ /* Transmeta-defined */
+ "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
+@@ -1339,7 +1213,7 @@ static int show_cpuinfo(struct seq_file
+ /* Intel-defined (#2) */
+ "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
+ "tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
+- NULL, NULL, "dca", NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, "dca", NULL, NULL, NULL, NULL, "popcnt",
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* VIA/Cyrix/Centaur-defined */
+@@ -1349,8 +1223,10 @@ static int show_cpuinfo(struct seq_file
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* AMD-defined (#2) */
+- "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ "lahf_lm", "cmp_legacy", "svm", "extapic", "cr8_legacy",
++ "altmovcr8", "abm", "sse4a",
++ "misalignsse", "3dnowprefetch",
++ "osvw", "ibs", NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ };
+@@ -1361,6 +1237,9 @@ static int show_cpuinfo(struct seq_file
+ "ttp", /* thermal trip */
+ "tm",
+ "stc",
++ "100mhzsteps",
++ "hwpstate",
++ NULL, /* tsc invariant mapped to constant_tsc */
+ NULL,
+ /* nothing */ /* constant_tsc - moved to flags */
+ };
+@@ -1477,26 +1356,3 @@ struct seq_operations cpuinfo_op = {
+ .stop = c_stop,
+ .show = show_cpuinfo,
+ };
+-
+-#if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
+-#include <linux/platform_device.h>
+-static __init int add_pcspkr(void)
+-{
+- struct platform_device *pd;
+- int ret;
+-
+- if (!is_initial_xendomain())
+- return 0;
+-
+- pd = platform_device_alloc("pcspkr", -1);
+- if (!pd)
+- return -ENOMEM;
+-
+- ret = platform_device_add(pd);
+- if (ret)
+- platform_device_put(pd);
+-
+- return ret;
+-}
+-device_initcall(add_pcspkr);
+-#endif
+--- a/arch/x86/kernel/smp_32-xen.c
++++ b/arch/x86/kernel/smp_32-xen.c
+@@ -335,8 +335,7 @@ static void flush_tlb_others(cpumask_t c
+ /*
+ * i'm not happy about this global shared spinlock in the
+ * MM hot path, but we'll see how contended it is.
+- * Temporarily this turns IRQs off, so that lockups are
+- * detected by the NMI watchdog.
++ * AK: x86-64 has a faster method that could be ported.
+ */
+ spin_lock(&tlbstate_lock);
+
+@@ -361,7 +360,7 @@ static void flush_tlb_others(cpumask_t c
+
+ while (!cpus_empty(flush_cpumask))
+ /* nothing. lockup detection does not belong here */
+- mb();
++ cpu_relax();
+
+ flush_mm = NULL;
+ flush_va = 0;
+--- a/arch/x86/kernel/time_32-xen.c
++++ b/arch/x86/kernel/time_32-xen.c
+@@ -51,6 +51,7 @@
+ #include <linux/kernel_stat.h>
+ #include <linux/posix-timers.h>
+ #include <linux/cpufreq.h>
++#include <linux/clocksource.h>
+
+ #include <asm/io.h>
+ #include <asm/smp.h>
+@@ -75,25 +76,17 @@
+ #include <xen/evtchn.h>
+ #include <xen/interface/vcpu.h>
+
+-#if defined (__i386__)
+-#include <asm/i8259.h>
++#ifdef CONFIG_X86_32
+ #include <asm/i8253.h>
+ DEFINE_SPINLOCK(i8253_lock);
+ EXPORT_SYMBOL(i8253_lock);
+-#endif
+-
+-#define XEN_SHIFT 22
+-
+ int pit_latch_buggy; /* extern */
+-
+-#if defined(__x86_64__)
+-unsigned long vxtime_hz = PIT_TICK_RATE;
+-struct vxtime_data __vxtime __section_vxtime; /* for vsyscalls */
++#else
+ volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
+-struct timespec __xtime __section_xtime;
+-struct timezone __sys_tz __section_sys_tz;
+ #endif
+
++#define XEN_SHIFT 22
++
+ unsigned int cpu_khz; /* Detected as we calibrate the TSC */
+ EXPORT_SYMBOL(cpu_khz);
+
+@@ -113,9 +106,6 @@ static DEFINE_PER_CPU(struct shadow_time
+ static struct timespec shadow_tv;
+ static u32 shadow_tv_version;
+
+-static struct timeval monotonic_tv;
+-static spinlock_t monotonic_lock = SPIN_LOCK_UNLOCKED;
+-
+ /* Keep track of last time we did processing/updating of jiffies and xtime. */
+ static u64 processed_system_time; /* System time (ns) at last processing. */
+ static DEFINE_PER_CPU(u64, processed_system_time);
+@@ -228,7 +218,7 @@ static inline u64 scale_delta(u64 delta,
+ return product;
+ }
+
+-void init_cpu_khz(void)
++static void init_cpu_khz(void)
+ {
+ u64 __cpu_khz = 1000000ULL << 32;
+ struct vcpu_time_info *info = &vcpu_info(0)->time;
+@@ -247,16 +237,6 @@ static u64 get_nsec_offset(struct shadow
+ return scale_delta(delta, shadow->tsc_to_nsec_mul, shadow->tsc_shift);
+ }
+
+-#ifdef CONFIG_X86_64
+-static unsigned long get_usec_offset(struct shadow_time_info *shadow)
+-{
+- u64 now, delta;
+- rdtscll(now);
+- delta = now - shadow->tsc_timestamp;
+- return scale_delta(delta, shadow->tsc_to_usec_mul, shadow->tsc_shift);
+-}
+-#endif
+-
+ static void __update_wallclock(time_t sec, long nsec)
+ {
+ long wtm_nsec, xtime_nsec;
+@@ -371,138 +351,6 @@ void rtc_cmos_write(unsigned char val, u
+ }
+ EXPORT_SYMBOL(rtc_cmos_write);
+
+-#ifdef CONFIG_X86_64
+-
+-/*
+- * This version of gettimeofday has microsecond resolution
+- * and better than microsecond precision on fast x86 machines with TSC.
+- */
+-void do_gettimeofday(struct timeval *tv)
+-{
+- unsigned long seq;
+- unsigned long usec, sec;
+- unsigned long flags;
+- s64 nsec;
+- unsigned int cpu;
+- struct shadow_time_info *shadow;
+- u32 local_time_version;
+-
+- cpu = get_cpu();
+- shadow = &per_cpu(shadow_time, cpu);
+-
+- do {
+- local_time_version = shadow->version;
+- seq = read_seqbegin(&xtime_lock);
+-
+- usec = get_usec_offset(shadow);
+-
+- sec = xtime.tv_sec;
+- usec += (xtime.tv_nsec / NSEC_PER_USEC);
+-
+- nsec = shadow->system_timestamp - processed_system_time;
+- __normalize_time(&sec, &nsec);
+- usec += (long)nsec / NSEC_PER_USEC;
+-
+- if (unlikely(!time_values_up_to_date(cpu))) {
+- /*
+- * We may have blocked for a long time,
+- * rendering our calculations invalid
+- * (e.g. the time delta may have
+- * overflowed). Detect that and recalculate
+- * with fresh values.
+- */
+- get_time_values_from_xen(cpu);
+- continue;
+- }
+- } while (read_seqretry(&xtime_lock, seq) ||
+- (local_time_version != shadow->version));
+-
+- put_cpu();
+-
+- while (usec >= USEC_PER_SEC) {
+- usec -= USEC_PER_SEC;
+- sec++;
+- }
+-
+- spin_lock_irqsave(&monotonic_lock, flags);
+- if ((sec > monotonic_tv.tv_sec) ||
+- ((sec == monotonic_tv.tv_sec) && (usec > monotonic_tv.tv_usec)))
+- {
+- monotonic_tv.tv_sec = sec;
+- monotonic_tv.tv_usec = usec;
+- } else {
+- sec = monotonic_tv.tv_sec;
+- usec = monotonic_tv.tv_usec;
+- }
+- spin_unlock_irqrestore(&monotonic_lock, flags);
+-
+- tv->tv_sec = sec;
+- tv->tv_usec = usec;
+-}
+-
+-EXPORT_SYMBOL(do_gettimeofday);
+-
+-int do_settimeofday(struct timespec *tv)
+-{
+- time_t sec;
+- s64 nsec;
+- unsigned int cpu;
+- struct shadow_time_info *shadow;
+- struct xen_platform_op op;
+-
+- if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
+- return -EINVAL;
+-
+- cpu = get_cpu();
+- shadow = &per_cpu(shadow_time, cpu);
+-
+- write_seqlock_irq(&xtime_lock);
+-
+- /*
+- * Ensure we don't get blocked for a long time so that our time delta
+- * overflows. If that were to happen then our shadow time values would
+- * be stale, so we can retry with fresh ones.
+- */
+- for (;;) {
+- nsec = tv->tv_nsec - get_nsec_offset(shadow);
+- if (time_values_up_to_date(cpu))
+- break;
+- get_time_values_from_xen(cpu);
+- }
+- sec = tv->tv_sec;
+- __normalize_time(&sec, &nsec);
+-
+- if (is_initial_xendomain() && !independent_wallclock) {
+- op.cmd = XENPF_settime;
+- op.u.settime.secs = sec;
+- op.u.settime.nsecs = nsec;
+- op.u.settime.system_time = shadow->system_timestamp;
+- WARN_ON(HYPERVISOR_platform_op(&op));
+- update_wallclock();
+- } else if (independent_wallclock) {
+- nsec -= shadow->system_timestamp;
+- __normalize_time(&sec, &nsec);
+- __update_wallclock(sec, nsec);
+- }
+-
+- /* Reset monotonic gettimeofday() timeval. */
+- spin_lock(&monotonic_lock);
+- monotonic_tv.tv_sec = 0;
+- monotonic_tv.tv_usec = 0;
+- spin_unlock(&monotonic_lock);
+-
+- write_sequnlock_irq(&xtime_lock);
+-
+- put_cpu();
+-
+- clock_was_set();
+- return 0;
+-}
+-
+-EXPORT_SYMBOL(do_settimeofday);
+-
+-#endif
+-
+ static void sync_xen_wallclock(unsigned long dummy);
+ static DEFINE_TIMER(sync_xen_wallclock_timer, sync_xen_wallclock, 0, 0);
+ static void sync_xen_wallclock(unsigned long dummy)
+@@ -551,15 +399,7 @@ static int set_rtc_mmss(unsigned long no
+ return retval;
+ }
+
+-#ifdef CONFIG_X86_64
+-/* monotonic_clock(): returns # of nanoseconds passed since time_init()
+- * Note: This function is required to return accurate
+- * time even in the absence of multiple timer ticks.
+- */
+-unsigned long long monotonic_clock(void)
+-#else
+ unsigned long long sched_clock(void)
+-#endif
+ {
+ unsigned int cpu = get_cpu();
+ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
+@@ -579,21 +419,18 @@ unsigned long long sched_clock(void)
+
+ return time;
+ }
+-#ifdef CONFIG_X86_64
+-EXPORT_SYMBOL(monotonic_clock);
+-
+-unsigned long long sched_clock(void)
+-{
+- return monotonic_clock();
+-}
+-#endif
+
+ unsigned long profile_pc(struct pt_regs *regs)
+ {
+ unsigned long pc = instruction_pointer(regs);
+
+ #if defined(CONFIG_SMP) || defined(__x86_64__)
+- if (!user_mode_vm(regs) && in_lock_functions(pc)) {
++# ifdef __i386__
++ if (!v8086_mode(regs) && SEGMENT_IS_KERNEL_CODE(regs->xcs)
++# else
++ if (!user_mode(regs)
++# endif
++ && in_lock_functions(pc)) {
+ # ifdef CONFIG_FRAME_POINTER
+ # ifdef __i386__
+ return ((unsigned long *)regs->ebp)[1];
+@@ -602,14 +439,11 @@ unsigned long profile_pc(struct pt_regs
+ # endif
+ # else
+ # ifdef __i386__
+- unsigned long *sp;
+- if ((regs->xcs & 2) == 0)
+- sp = (unsigned long *)®s->esp;
+- else
+- sp = (unsigned long *)regs->esp;
++ unsigned long *sp = (unsigned long *)®s->esp;
+ # else
+ unsigned long *sp = (unsigned long *)regs->rsp;
+ # endif
++
+ /* Return address is either directly at stack pointer
+ or above a saved eflags. Eflags has bits 22-31 zero,
+ kernel addresses don't. */
+@@ -762,19 +596,6 @@ irqreturn_t timer_interrupt(int irq, voi
+ return IRQ_HANDLED;
+ }
+
+-#ifndef CONFIG_X86_64
+-
+-void tsc_init(void)
+-{
+- init_cpu_khz();
+- printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
+- cpu_khz / 1000, cpu_khz % 1000);
+-
+- use_tsc_delay();
+-}
+-
+-#include <linux/clocksource.h>
+-
+ void mark_tsc_unstable(void)
+ {
+ #ifndef CONFIG_XEN /* XXX Should tell the hypervisor about this fact. */
+@@ -830,21 +651,9 @@ static struct clocksource clocksource_xe
+ .mask = CLOCKSOURCE_MASK(64),
+ .mult = 1 << XEN_SHIFT, /* time directly in nanoseconds */
+ .shift = XEN_SHIFT,
+- .is_continuous = 1,
++ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+ };
+
+-static int __init init_xen_clocksource(void)
+-{
+- clocksource_xen.mult = clocksource_khz2mult(cpu_khz,
+- clocksource_xen.shift);
+-
+- return clocksource_register(&clocksource_xen);
+-}
+-
+-module_init(init_xen_clocksource);
+-
+-#endif
+-
+ static void init_missing_ticks_accounting(unsigned int cpu)
+ {
+ struct vcpu_register_runstate_memory_area area;
+@@ -865,7 +674,7 @@ static void init_missing_ticks_accountin
+ }
+
+ /* not static: needed by APM */
+-unsigned long get_cmos_time(void)
++unsigned long read_persistent_clock(void)
+ {
+ unsigned long retval;
+ unsigned long flags;
+@@ -878,11 +687,11 @@ unsigned long get_cmos_time(void)
+
+ return retval;
+ }
+-EXPORT_SYMBOL(get_cmos_time);
+
+ static void sync_cmos_clock(unsigned long dummy);
+
+ static DEFINE_TIMER(sync_cmos_timer, sync_cmos_clock, 0, 0);
++int no_sync_cmos_clock;
+
+ static void sync_cmos_clock(unsigned long dummy)
+ {
+@@ -926,7 +735,8 @@ static void sync_cmos_clock(unsigned lon
+
+ void notify_arch_cmos_timer(void)
+ {
+- mod_timer(&sync_cmos_timer, jiffies + 1);
++ if (!no_sync_cmos_clock)
++ mod_timer(&sync_cmos_timer, jiffies + 1);
+ mod_timer(&sync_xen_wallclock_timer, jiffies + 1);
+ }
+
+@@ -959,29 +769,11 @@ static int time_init_device(void)
+
+ device_initcall(time_init_device);
+
+-#ifdef CONFIG_HPET_TIMER
+ extern void (*late_time_init)(void);
+-/* Duplicate of time_init() below, with hpet_enable part added */
+-static void __init hpet_time_init(void)
+-{
+- struct timespec ts;
+- ts.tv_sec = get_cmos_time();
+- ts.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
+-
+- do_settimeofday(&ts);
+-
+- if ((hpet_enable() >= 0) && hpet_use_timer) {
+- printk("Using HPET for base-timer\n");
+- }
+-
+- do_time_init();
+-}
+-#endif
+
+ /* Dynamically-mapped IRQ. */
+ DEFINE_PER_CPU(int, timer_irq);
+
+-extern void (*late_time_init)(void);
+ static void setup_cpu0_timer_irq(void)
+ {
+ per_cpu(timer_irq, 0) =
+@@ -989,7 +781,7 @@ static void setup_cpu0_timer_irq(void)
+ VIRQ_TIMER,
+ 0,
+ timer_interrupt,
+- SA_INTERRUPT,
++ IRQF_DISABLED|IRQF_NOBALANCING,
+ "timer0",
+ NULL);
+ BUG_ON(per_cpu(timer_irq, 0) < 0);
+@@ -1001,16 +793,9 @@ static struct vcpu_set_periodic_timer xe
+
+ void __init time_init(void)
+ {
+-#ifdef CONFIG_HPET_TIMER
+- if (is_hpet_capable()) {
+- /*
+- * HPET initialization needs to do memory-mapped io. So, let
+- * us do a late initialization after mem_init().
+- */
+- late_time_init = hpet_time_init;
+- return;
+- }
+-#endif
++ init_cpu_khz();
++ printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
++ cpu_khz / 1000, cpu_khz % 1000);
+
+ switch (HYPERVISOR_vcpu_op(VCPUOP_set_periodic_timer, 0,
+ &xen_set_periodic_tick)) {
+@@ -1029,18 +814,12 @@ void __init time_init(void)
+ per_cpu(processed_system_time, 0) = processed_system_time;
+ init_missing_ticks_accounting(0);
+
+- update_wallclock();
++ clocksource_register(&clocksource_xen);
+
+-#ifdef CONFIG_X86_64
+- init_cpu_khz();
+- printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
+- cpu_khz / 1000, cpu_khz % 1000);
++ update_wallclock();
+
+- vxtime.mode = VXTIME_TSC;
+- vxtime.quot = (1000000L << 32) / vxtime_hz;
+- vxtime.tsc_quot = (1000L << 32) / cpu_khz;
+- sync_core();
+- rdtscll(vxtime.last_tsc);
++#ifndef CONFIG_X86_64
++ use_tsc_delay();
+ #endif
+
+ /* Cannot request_irq() until kmem is initialised. */
+@@ -1197,7 +976,7 @@ int __cpuinit local_setup_timer(unsigned
+ irq = bind_virq_to_irqhandler(VIRQ_TIMER,
+ cpu,
+ timer_interrupt,
+- SA_INTERRUPT,
++ IRQF_DISABLED|IRQF_NOBALANCING,
+ timer_name[cpu],
+ NULL);
+ if (irq < 0)
+@@ -1286,7 +1065,7 @@ static ctl_table xen_table[] = {
+ };
+ static int __init xen_sysctl_init(void)
+ {
+- (void)register_sysctl_table(xen_table, 0);
++ (void)register_sysctl_table(xen_table);
+ return 0;
+ }
+ __initcall(xen_sysctl_init);
+--- a/arch/x86/kernel/traps_32-xen.c
++++ b/arch/x86/kernel/traps_32-xen.c
+@@ -100,6 +100,7 @@ asmlinkage void fixup_4gb_segment(void);
+ asmlinkage void machine_check(void);
+
+ int kstack_depth_to_print = 24;
++static unsigned int code_bytes = 64;
+ ATOMIC_NOTIFIER_HEAD(i386die_chain);
+
+ int register_die_notifier(struct notifier_block *nb)
+@@ -297,10 +298,11 @@ void show_registers(struct pt_regs *regs
+ int i;
+ int in_kernel = 1;
+ unsigned long esp;
+- unsigned short ss;
++ unsigned short ss, gs;
+
+ esp = (unsigned long) (®s->esp);
+ savesegment(ss, ss);
++ savesegment(gs, gs);
+ if (user_mode_vm(regs)) {
+ in_kernel = 0;
+ esp = regs->esp;
+@@ -319,8 +321,8 @@ void show_registers(struct pt_regs *regs
+ regs->eax, regs->ebx, regs->ecx, regs->edx);
+ printk(KERN_EMERG "esi: %08lx edi: %08lx ebp: %08lx esp: %08lx\n",
+ regs->esi, regs->edi, regs->ebp, esp);
+- printk(KERN_EMERG "ds: %04x es: %04x ss: %04x\n",
+- regs->xds & 0xffff, regs->xes & 0xffff, ss);
++ printk(KERN_EMERG "ds: %04x es: %04x fs: %04x gs: %04x ss: %04x\n",
++ regs->xds & 0xffff, regs->xes & 0xffff, regs->xfs & 0xffff, gs, ss);
+ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+ TASK_COMM_LEN, current->comm, current->pid,
+ current_thread_info(), current, current->thread_info);
+@@ -330,7 +332,8 @@ void show_registers(struct pt_regs *regs
+ */
+ if (in_kernel) {
+ u8 *eip;
+- int code_bytes = 64;
++ unsigned int code_prologue = code_bytes * 43 / 64;
++ unsigned int code_len = code_bytes;
+ unsigned char c;
+
+ printk("\n" KERN_EMERG "Stack: ");
+@@ -338,14 +341,14 @@ void show_registers(struct pt_regs *regs
+
+ printk(KERN_EMERG "Code: ");
+
+- eip = (u8 *)regs->eip - 43;
++ eip = (u8 *)regs->eip - code_prologue;
+ if (eip < (u8 *)PAGE_OFFSET ||
+ probe_kernel_address(eip, c)) {
+ /* try starting at EIP */
+ eip = (u8 *)regs->eip;
+- code_bytes = 32;
++ code_len = code_len - code_prologue + 1;
+ }
+- for (i = 0; i < code_bytes; i++, eip++) {
++ for (i = 0; i < code_len; i++, eip++) {
+ if (eip < (u8 *)PAGE_OFFSET ||
+ probe_kernel_address(eip, c)) {
+ printk(" Bad EIP value.");
+@@ -1134,3 +1137,13 @@ static int __init kstack_setup(char *s)
+ return 1;
+ }
+ __setup("kstack=", kstack_setup);
++
++static int __init code_bytes_setup(char *s)
++{
++ code_bytes = simple_strtoul(s, NULL, 0);
++ if (code_bytes > 8192)
++ code_bytes = 8192;
++
++ return 1;
++}
++__setup("code_bytes=", code_bytes_setup);
+--- a/arch/x86/kernel/vsyscall_64-xen.c
++++ b/arch/x86/kernel/vsyscall_64-xen.c
+@@ -26,6 +26,7 @@
+ #include <linux/seqlock.h>
+ #include <linux/jiffies.h>
+ #include <linux/sysctl.h>
++#include <linux/clocksource.h>
+ #include <linux/getcpu.h>
+ #include <linux/cpu.h>
+ #include <linux/smp.h>
+@@ -34,6 +35,7 @@
+ #include <asm/vsyscall.h>
+ #include <asm/pgtable.h>
+ #include <asm/page.h>
++#include <asm/unistd.h>
+ #include <asm/fixmap.h>
+ #include <asm/errno.h>
+ #include <asm/io.h>
+@@ -44,56 +46,41 @@
+ #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
+ #define __syscall_clobber "r11","rcx","memory"
+
+-int __sysctl_vsyscall __section_sysctl_vsyscall = 1;
+-seqlock_t __xtime_lock __section_xtime_lock = SEQLOCK_UNLOCKED;
++struct vsyscall_gtod_data_t {
++ seqlock_t lock;
++ int sysctl_enabled;
++ struct timeval wall_time_tv;
++ struct timezone sys_tz;
++ cycle_t offset_base;
++ struct clocksource clock;
++};
+ int __vgetcpu_mode __section_vgetcpu_mode;
+
+-#include <asm/unistd.h>
+-
+-static __always_inline void timeval_normalize(struct timeval * tv)
++struct vsyscall_gtod_data_t __vsyscall_gtod_data __section_vsyscall_gtod_data =
+ {
+- time_t __sec;
+-
+- __sec = tv->tv_usec / 1000000;
+- if (__sec) {
+- tv->tv_usec %= 1000000;
+- tv->tv_sec += __sec;
+- }
+-}
++ .lock = SEQLOCK_UNLOCKED,
++ .sysctl_enabled = 1,
++};
+
+-static __always_inline void do_vgettimeofday(struct timeval * tv)
++void update_vsyscall(struct timespec *wall_time, struct clocksource *clock)
+ {
+- long sequence, t;
+- unsigned long sec, usec;
++ unsigned long flags;
+
+- do {
+- sequence = read_seqbegin(&__xtime_lock);
+-
+- sec = __xtime.tv_sec;
+- usec = __xtime.tv_nsec / 1000;
+-
+- if (__vxtime.mode != VXTIME_HPET) {
+- t = get_cycles_sync();
+- if (t < __vxtime.last_tsc)
+- t = __vxtime.last_tsc;
+- usec += ((t - __vxtime.last_tsc) *
+- __vxtime.tsc_quot) >> 32;
+- /* See comment in x86_64 do_gettimeofday. */
+- } else {
+- usec += ((readl((void __iomem *)
+- fix_to_virt(VSYSCALL_HPET) + 0xf0) -
+- __vxtime.last) * __vxtime.quot) >> 32;
+- }
+- } while (read_seqretry(&__xtime_lock, sequence));
+-
+- tv->tv_sec = sec + usec / 1000000;
+- tv->tv_usec = usec % 1000000;
++ write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
++ /* copy vsyscall data */
++ vsyscall_gtod_data.clock = *clock;
++ vsyscall_gtod_data.wall_time_tv.tv_sec = wall_time->tv_sec;
++ vsyscall_gtod_data.wall_time_tv.tv_usec = wall_time->tv_nsec/1000;
++ vsyscall_gtod_data.sys_tz = sys_tz;
++ write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
+ }
+
+-/* RED-PEN may want to readd seq locking, but then the variable should be write-once. */
++/* RED-PEN may want to readd seq locking, but then the variable should be
++ * write-once.
++ */
+ static __always_inline void do_get_tz(struct timezone * tz)
+ {
+- *tz = __sys_tz;
++ *tz = __vsyscall_gtod_data.sys_tz;
+ }
+
+ static __always_inline int gettimeofday(struct timeval *tv, struct timezone *tz)
+@@ -101,7 +88,8 @@ static __always_inline int gettimeofday(
+ int ret;
+ asm volatile("vsysc2: syscall"
+ : "=a" (ret)
+- : "0" (__NR_gettimeofday),"D" (tv),"S" (tz) : __syscall_clobber );
++ : "0" (__NR_gettimeofday),"D" (tv),"S" (tz)
++ : __syscall_clobber );
+ return ret;
+ }
+
+@@ -114,10 +102,44 @@ static __always_inline long time_syscall
+ return secs;
+ }
+
++static __always_inline void do_vgettimeofday(struct timeval * tv)
++{
++ cycle_t now, base, mask, cycle_delta;
++ unsigned long seq, mult, shift, nsec_delta;
++ cycle_t (*vread)(void);
++ do {
++ seq = read_seqbegin(&__vsyscall_gtod_data.lock);
++
++ vread = __vsyscall_gtod_data.clock.vread;
++ if (unlikely(!__vsyscall_gtod_data.sysctl_enabled || !vread)) {
++ gettimeofday(tv,NULL);
++ return;
++ }
++ now = vread();
++ base = __vsyscall_gtod_data.clock.cycle_last;
++ mask = __vsyscall_gtod_data.clock.mask;
++ mult = __vsyscall_gtod_data.clock.mult;
++ shift = __vsyscall_gtod_data.clock.shift;
++
++ *tv = __vsyscall_gtod_data.wall_time_tv;
++
++ } while (read_seqretry(&__vsyscall_gtod_data.lock, seq));
++
++ /* calculate interval: */
++ cycle_delta = (now - base) & mask;
++ /* convert to nsecs: */
++ nsec_delta = (cycle_delta * mult) >> shift;
++
++ /* convert to usecs and add to timespec: */
++ tv->tv_usec += nsec_delta / NSEC_PER_USEC;
++ while (tv->tv_usec > USEC_PER_SEC) {
++ tv->tv_sec += 1;
++ tv->tv_usec -= USEC_PER_SEC;
++ }
++}
++
+ int __vsyscall(0) vgettimeofday(struct timeval * tv, struct timezone * tz)
+ {
+- if (!__sysctl_vsyscall)
+- return gettimeofday(tv,tz);
+ if (tv)
+ do_vgettimeofday(tv);
+ if (tz)
+@@ -129,11 +151,11 @@ int __vsyscall(0) vgettimeofday(struct t
+ * unlikely */
+ time_t __vsyscall(1) vtime(time_t *t)
+ {
+- if (!__sysctl_vsyscall)
++ if (unlikely(!__vsyscall_gtod_data.sysctl_enabled))
+ return time_syscall(t);
+ else if (t)
+- *t = __xtime.tv_sec;
+- return __xtime.tv_sec;
++ *t = __vsyscall_gtod_data.wall_time_tv.tv_sec;
++ return __vsyscall_gtod_data.wall_time_tv.tv_sec;
+ }
+
+ /* Fast way to get current CPU and node.
+@@ -210,7 +232,7 @@ static int vsyscall_sysctl_change(ctl_ta
+ ret = -ENOMEM;
+ goto out;
+ }
+- if (!sysctl_vsyscall) {
++ if (!vsyscall_gtod_data.sysctl_enabled) {
+ writew(SYSCALL, map1);
+ writew(SYSCALL, map2);
+ } else {
+@@ -232,16 +254,17 @@ static int vsyscall_sysctl_nostrat(ctl_t
+
+ static ctl_table kernel_table2[] = {
+ { .ctl_name = 99, .procname = "vsyscall64",
+- .data = &sysctl_vsyscall, .maxlen = sizeof(int), .mode = 0644,
++ .data = &vsyscall_gtod_data.sysctl_enabled, .maxlen = sizeof(int),
++ .mode = 0644,
+ .strategy = vsyscall_sysctl_nostrat,
+ .proc_handler = vsyscall_sysctl_change },
+- { 0, }
++ {}
+ };
+
+ static ctl_table kernel_root_table2[] = {
+ { .ctl_name = CTL_KERN, .procname = "kernel", .mode = 0555,
+ .child = kernel_table2 },
+- { 0 },
++ {}
+ };
+
+ #endif
+@@ -304,14 +327,14 @@ static int __init vsyscall_init(void)
+ BUG_ON((unsigned long) &vgetcpu != VSYSCALL_ADDR(__NR_vgetcpu));
+ map_vsyscall();
+ #ifdef CONFIG_XEN
+- sysctl_vsyscall = 0; /* disable vgettimeofay() */
++ vsyscall_gtod_data.sysctl_enabled = 0; /* disable vgettimeofay() */
+ if (boot_cpu_has(X86_FEATURE_RDTSCP))
+ vgetcpu_mode = VGETCPU_RDTSCP;
+ else
+ vgetcpu_mode = VGETCPU_LSL;
+ #endif
+ #ifdef CONFIG_SYSCTL
+- register_sysctl_table(kernel_root_table2, 0);
++ register_sysctl_table(kernel_root_table2);
+ #endif
+ on_each_cpu(cpu_vsyscall_init, NULL, 0, 1);
+ hotcpu_notifier(cpu_vsyscall_notifier, 0);
+--- a/arch/x86/mm/fault_32-xen.c
++++ b/arch/x86/mm/fault_32-xen.c
+@@ -46,43 +46,17 @@ int unregister_page_fault_notifier(struc
+ }
+ EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
+
+-static inline int notify_page_fault(enum die_val val, const char *str,
+- struct pt_regs *regs, long err, int trap, int sig)
++static inline int notify_page_fault(struct pt_regs *regs, long err)
+ {
+ struct die_args args = {
+ .regs = regs,
+- .str = str,
++ .str = "page fault",
+ .err = err,
+- .trapnr = trap,
+- .signr = sig
++ .trapnr = 14,
++ .signr = SIGSEGV
+ };
+- return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args);
+-}
+-
+-/*
+- * Unlock any spinlocks which will prevent us from getting the
+- * message out
+- */
+-void bust_spinlocks(int yes)
+-{
+- int loglevel_save = console_loglevel;
+-
+- if (yes) {
+- oops_in_progress = 1;
+- return;
+- }
+-#ifdef CONFIG_VT
+- unblank_screen();
+-#endif
+- oops_in_progress = 0;
+- /*
+- * OK, the message is on the console. Now we call printk()
+- * without oops_in_progress set so that printk will give klogd
+- * a poke. Hold onto your hats...
+- */
+- console_loglevel = 15; /* NMI oopser may have shut the console up */
+- printk(" ");
+- console_loglevel = loglevel_save;
++ return atomic_notifier_call_chain(¬ify_page_fault_chain,
++ DIE_PAGE_FAULT, &args);
+ }
+
+ /*
+@@ -476,8 +450,7 @@ fastcall void __kprobes do_page_fault(st
+ /* Can take a spurious fault if mapping changes R/O -> R/W. */
+ if (spurious_fault(regs, address, error_code))
+ return;
+- if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
+- SIGSEGV) == NOTIFY_STOP)
++ if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
+ return;
+ /*
+ * Don't take the mm semaphore here. If we fixup a prefetch
+@@ -486,8 +459,7 @@ fastcall void __kprobes do_page_fault(st
+ goto bad_area_nosemaphore;
+ }
+
+- if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
+- SIGSEGV) == NOTIFY_STOP)
++ if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
+ return;
+
+ /* It's safe to allow irq's after cr2 has been saved and the vmalloc
+--- a/arch/x86/mm/fault_64-xen.c
++++ b/arch/x86/mm/fault_64-xen.c
+@@ -56,38 +56,17 @@ int unregister_page_fault_notifier(struc
+ }
+ EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
+
+-static inline int notify_page_fault(enum die_val val, const char *str,
+- struct pt_regs *regs, long err, int trap, int sig)
++static inline int notify_page_fault(struct pt_regs *regs, long err)
+ {
+ struct die_args args = {
+ .regs = regs,
+- .str = str,
++ .str = "page fault",
+ .err = err,
+- .trapnr = trap,
+- .signr = sig
++ .trapnr = 14,
++ .signr = SIGSEGV
+ };
+- return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args);
+-}
+-
+-void bust_spinlocks(int yes)
+-{
+- int loglevel_save = console_loglevel;
+- if (yes) {
+- oops_in_progress = 1;
+- } else {
+-#ifdef CONFIG_VT
+- unblank_screen();
+-#endif
+- oops_in_progress = 0;
+- /*
+- * OK, the message is on the console. Now we call printk()
+- * without oops_in_progress set so that printk will give klogd
+- * a poke. Hold onto your hats...
+- */
+- console_loglevel = 15; /* NMI oopser may have shut the console up */
+- printk(" ");
+- console_loglevel = loglevel_save;
+- }
++ return atomic_notifier_call_chain(¬ify_page_fault_chain,
++ DIE_PAGE_FAULT, &args);
+ }
+
+ /* Sometimes the CPU reports invalid exceptions on prefetch.
+@@ -437,8 +416,7 @@ asmlinkage void __kprobes do_page_fault(
+ /* Can take a spurious fault if mapping changes R/O -> R/W. */
+ if (spurious_fault(regs, address, error_code))
+ return;
+- if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
+- SIGSEGV) == NOTIFY_STOP)
++ if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
+ return;
+ /*
+ * Don't take the mm semaphore here. If we fixup a prefetch
+@@ -447,8 +425,7 @@ asmlinkage void __kprobes do_page_fault(
+ goto bad_area_nosemaphore;
+ }
+
+- if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
+- SIGSEGV) == NOTIFY_STOP)
++ if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
+ return;
+
+ if (likely(regs->eflags & X86_EFLAGS_IF))
+--- a/arch/x86/mm/highmem_32-xen.c
++++ b/arch/x86/mm/highmem_32-xen.c
+@@ -33,14 +33,16 @@ static void *__kmap_atomic(struct page *
+
+ /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
+ pagefault_disable();
++
++ idx = type + KM_TYPE_NR*smp_processor_id();
++ BUG_ON(!pte_none(*(kmap_pte-idx)));
++
+ if (!PageHighMem(page))
+ return page_address(page);
+
+- idx = type + KM_TYPE_NR*smp_processor_id();
+ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
+- if (!pte_none(*(kmap_pte-idx)))
+- BUG();
+ set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
++ /*arch_flush_lazy_mmu_mode();*/
+
+ return (void*) vaddr;
+ }
+@@ -94,6 +96,7 @@ void *kmap_atomic_pfn(unsigned long pfn,
+ idx = type + KM_TYPE_NR*smp_processor_id();
+ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
+ set_pte(kmap_pte-idx, pfn_pte(pfn, kmap_prot));
++ /*arch_flush_lazy_mmu_mode();*/
+
+ return (void*) vaddr;
+ }
+--- a/arch/x86/mm/init_32-xen.c
++++ b/arch/x86/mm/init_32-xen.c
+@@ -66,6 +66,7 @@ static pmd_t * __init one_md_table_init(
+
+ #ifdef CONFIG_X86_PAE
+ pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
++ paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(pmd_table, XENFEAT_writable_page_tables);
+ set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
+ pud = pud_offset(pgd, 0);
+@@ -87,6 +88,7 @@ static pte_t * __init one_page_table_ini
+ {
+ if (pmd_none(*pmd)) {
+ pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
++ paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(page_table,
+ XENFEAT_writable_page_tables);
+ set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
+--- a/arch/x86/mm/init_64-xen.c
++++ b/arch/x86/mm/init_64-xen.c
+@@ -1110,20 +1110,30 @@ int kern_addr_valid(unsigned long addr)
+ extern int exception_trace, page_fault_trace;
+
+ static ctl_table debug_table2[] = {
+- { 99, "exception-trace", &exception_trace, sizeof(int), 0644, NULL,
+- proc_dointvec },
+- { 0, }
++ {
++ .ctl_name = 99,
++ .procname = "exception-trace",
++ .data = &exception_trace,
++ .maxlen = sizeof(int),
++ .mode = 0644,
++ .proc_handler = proc_dointvec
++ },
++ {}
+ };
+
+ static ctl_table debug_root_table2[] = {
+- { .ctl_name = CTL_DEBUG, .procname = "debug", .mode = 0555,
+- .child = debug_table2 },
+- { 0 },
++ {
++ .ctl_name = CTL_DEBUG,
++ .procname = "debug",
++ .mode = 0555,
++ .child = debug_table2
++ },
++ {}
+ };
+
+ static __init int x8664_sysctl_init(void)
+ {
+- register_sysctl_table(debug_root_table2, 1);
++ register_sysctl_table(debug_root_table2);
+ return 0;
+ }
+ __initcall(x8664_sysctl_init);
+--- a/arch/x86/mm/pageattr_64-xen.c
++++ b/arch/x86/mm/pageattr_64-xen.c
+@@ -350,8 +350,8 @@ static void flush_kernel_map(void *arg)
+ void *adr = page_address(pg);
+ if (cpu_has_clflush)
+ cache_flush_page(adr);
+- __flush_tlb_one(adr);
+ }
++ __flush_tlb_all();
+ }
+
+ static inline void flush_map(struct list_head *l)
+@@ -376,6 +376,7 @@ static void revert_page(unsigned long ad
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t large_pte;
++ unsigned long pfn;
+
+ pgd = pgd_offset_k(address);
+ BUG_ON(pgd_none(*pgd));
+@@ -383,7 +384,8 @@ static void revert_page(unsigned long ad
+ BUG_ON(pud_none(*pud));
+ pmd = pmd_offset(pud, address);
+ BUG_ON(__pmd_val(*pmd) & _PAGE_PSE);
+- large_pte = mk_pte_phys(__pa(address) & LARGE_PAGE_MASK, ref_prot);
++ pfn = (__pa(address) & LARGE_PAGE_MASK) >> PAGE_SHIFT;
++ large_pte = pfn_pte(pfn, ref_prot);
+ large_pte = pte_mkhuge(large_pte);
+ set_pte((pte_t *)pmd, large_pte);
+ }
+--- a/arch/x86/mm/pgtable_32-xen.c
++++ b/arch/x86/mm/pgtable_32-xen.c
+@@ -149,6 +149,8 @@ void __set_fixmap (enum fixed_addresses
+ void __init reserve_top_address(unsigned long reserve)
+ {
+ BUG_ON(fixmaps > 0);
++ printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
++ (int)-reserve);
+ __FIXADDR_TOP = -reserve - PAGE_SIZE;
+ __VMALLOC_RESERVE += reserve;
+ }
+@@ -258,6 +260,12 @@ void pgd_ctor(void *pgd, struct kmem_cac
+ swapper_pg_dir + USER_PTRS_PER_PGD,
+ KERNEL_PGD_PTRS);
+ memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
++
++ /* must happen under lock */
++ paravirt_alloc_pd_clone(__pa(pgd) >> PAGE_SHIFT,
++ __pa(swapper_pg_dir) >> PAGE_SHIFT,
++ USER_PTRS_PER_PGD, PTRS_PER_PGD - USER_PTRS_PER_PGD);
++
+ pgd_list_add(pgd);
+ spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+@@ -268,6 +276,7 @@ void pgd_dtor(void *pgd, struct kmem_cac
+ {
+ unsigned long flags; /* can be called from interrupt context */
+
++ paravirt_release_pd(__pa(pgd) >> PAGE_SHIFT);
+ spin_lock_irqsave(&pgd_lock, flags);
+ pgd_list_del(pgd);
+ spin_unlock_irqrestore(&pgd_lock, flags);
+@@ -292,6 +301,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+ pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
+ if (!pmd)
+ goto out_oom;
++ paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
+ set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
+ }
+ return pgd;
+@@ -314,6 +324,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+ pmd[i] = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
+ if (!pmd[i])
+ goto out_oom;
++ paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
+ }
+
+ spin_lock_irqsave(&pgd_lock, flags);
+@@ -354,12 +365,17 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+
+ out_oom:
+ if (HAVE_SHARED_KERNEL_PMD) {
+- for (i--; i >= 0; i--)
+- kmem_cache_free(pmd_cache,
+- (void *)__va(pgd_val(pgd[i])-1));
++ for (i--; i >= 0; i--) {
++ pgd_t pgdent = pgd[i];
++ void* pmd = (void *)__va(pgd_val(pgdent)-1);
++ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
++ kmem_cache_free(pmd_cache, pmd);
++ }
+ } else {
+- for (i--; i >= 0; i--)
++ for (i--; i >= 0; i--) {
++ paravirt_release_pd(__pa(pmd[i]) >> PAGE_SHIFT);
+ kmem_cache_free(pmd_cache, pmd[i]);
++ }
+ kfree(pmd);
+ }
+ kmem_cache_free(pgd_cache, pgd);
+@@ -383,7 +399,9 @@ void pgd_free(pgd_t *pgd)
+ /* in the PAE case user pgd entries are overwritten before usage */
+ if (PTRS_PER_PMD > 1) {
+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
+- pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ pgd_t pgdent = pgd[i];
++ void* pmd = (void *)__va(pgd_val(pgdent)-1);
++ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+ kmem_cache_free(pmd_cache, pmd);
+ }
+
+--- a/drivers/acpi/processor_extcntl.c
++++ b/drivers/acpi/processor_extcntl.c
+@@ -32,9 +32,8 @@
+
+ #define ACPI_PROCESSOR_COMPONENT 0x01000000
+ #define ACPI_PROCESSOR_CLASS "processor"
+-#define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver"
+ #define _COMPONENT ACPI_PROCESSOR_COMPONENT
+-ACPI_MODULE_NAME("acpi_processor")
++ACPI_MODULE_NAME("processor_extcntl")
+
+ static int processor_extcntl_parse_csd(struct acpi_processor *pr);
+ static int processor_extcntl_get_performance(struct acpi_processor *pr);
+@@ -56,24 +55,17 @@ static int processor_notify_smm(void)
+ return 0;
+
+ /* Can't write pstate_cnt to smi_cmd if either value is zero */
+- if ((!acpi_fadt.smi_cmd) || (!acpi_fadt.pstate_cnt)) {
++ if (!acpi_gbl_FADT.smi_command || !acpi_gbl_FADT.pstate_control) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,"No SMI port or pstate_cnt\n"));
+ return 0;
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Writing pstate_cnt [0x%x] to smi_cmd [0x%x]\n",
+- acpi_fadt.pstate_cnt, acpi_fadt.smi_cmd));
++ acpi_gbl_FADT.pstate_control, acpi_gbl_FADT.smi_command));
+
+- /* FADT v1 doesn't support pstate_cnt, many BIOS vendors use
+- * it anyway, so we need to support it... */
+- if (acpi_fadt_is_v1) {
+- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+- "Using v1.0 FADT reserved value for pstate_cnt\n"));
+- }
+-
+- status = acpi_os_write_port(acpi_fadt.smi_cmd,
+- (u32) acpi_fadt.pstate_cnt, 8);
++ status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
++ acpi_gbl_FADT.pstate_control, 8);
+ if (ACPI_FAILURE(status))
+ return status;
+
+--- a/drivers/char/tpm/tpm_xen.c
++++ b/drivers/char/tpm/tpm_xen.c
+@@ -481,7 +481,6 @@ static struct xenbus_device_id tpmfront_
+
+ static struct xenbus_driver tpmfront = {
+ .name = "vtpm",
+- .owner = THIS_MODULE,
+ .ids = tpmfront_ids,
+ .probe = tpmfront_probe,
+ .remove = tpmfront_remove,
+@@ -491,9 +490,9 @@ static struct xenbus_driver tpmfront = {
+ .suspend_cancel = tpmfront_suspend_cancel,
+ };
+
+-static void __init init_tpm_xenbus(void)
++static int __init init_tpm_xenbus(void)
+ {
+- xenbus_register_frontend(&tpmfront);
++ return xenbus_register_frontend(&tpmfront);
+ }
+
+ static int tpmif_allocate_tx_buffers(struct tpm_private *tp)
+--- a/drivers/pci/msi-xen.c
++++ b/drivers/pci/msi-xen.c
+@@ -44,6 +44,36 @@ struct msi_pirq_entry {
+ int entry_nr;
+ };
+
++static void msi_set_enable(struct pci_dev *dev, int enable)
++{
++ int pos;
++ u16 control;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
++ if (pos) {
++ pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
++ control &= ~PCI_MSI_FLAGS_ENABLE;
++ if (enable)
++ control |= PCI_MSI_FLAGS_ENABLE;
++ pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
++ }
++}
++
++static void msix_set_enable(struct pci_dev *dev, int enable)
++{
++ int pos;
++ u16 control;
++
++ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
++ if (pos) {
++ pci_read_config_word(dev, pos + PCI_MSIX_FLAGS, &control);
++ control &= ~PCI_MSIX_FLAGS_ENABLE;
++ if (enable)
++ control |= PCI_MSIX_FLAGS_ENABLE;
++ pci_write_config_word(dev, pos + PCI_MSIX_FLAGS, control);
++ }
++}
++
+ static struct msi_dev_list *get_msi_dev_pirq_list(struct pci_dev *dev)
+ {
+ struct msi_dev_list *msi_dev_list, *ret = NULL;
+@@ -235,85 +265,13 @@ static int msi_map_vector(struct pci_dev
+
+ static int msi_init(void)
+ {
+- static int status = 0;
+-
+- if (pci_msi_quirk) {
+- pci_msi_enable = 0;
+- printk(KERN_WARNING "PCI: MSI quirk detected. MSI disabled.\n");
+- status = -EINVAL;
+- }
+-
+- return status;
+-}
+-
+-void pci_scan_msi_device(struct pci_dev *dev) { }
+-
+-void disable_msi_mode(struct pci_dev *dev, int pos, int type)
+-{
+- u16 control;
+-
+- pci_read_config_word(dev, msi_control_reg(pos), &control);
+- if (type == PCI_CAP_ID_MSI) {
+- /* Set enabled bits to single MSI & enable MSI_enable bit */
+- msi_disable(control);
+- pci_write_config_word(dev, msi_control_reg(pos), control);
+- dev->msi_enabled = 0;
+- } else {
+- msix_disable(control);
+- pci_write_config_word(dev, msi_control_reg(pos), control);
+- dev->msix_enabled = 0;
+- }
+-
+- pci_intx(dev, 1); /* enable intx */
+-}
+-
+-static void enable_msi_mode(struct pci_dev *dev, int pos, int type)
+-{
+- u16 control;
+-
+- pci_read_config_word(dev, msi_control_reg(pos), &control);
+- if (type == PCI_CAP_ID_MSI) {
+- /* Set enabled bits to single MSI & enable MSI_enable bit */
+- msi_enable(control, 1);
+- pci_write_config_word(dev, msi_control_reg(pos), control);
+- dev->msi_enabled = 1;
+- } else {
+- msix_enable(control);
+- pci_write_config_word(dev, msi_control_reg(pos), control);
+- dev->msix_enabled = 1;
+- }
+-
+- pci_intx(dev, 0); /* disable intx */
+-}
+-
+-#ifdef CONFIG_PM
+-int pci_save_msi_state(struct pci_dev *dev)
+-{
+- int pos;
+-
+- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+- if (pos <= 0 || dev->no_msi)
+- return 0;
+-
+- if (!dev->msi_enabled)
+- return 0;
+-
+- /* Restore dev->irq to its default pin-assertion vector */
+- msi_unmap_pirq(dev, dev->irq);
+- /* Disable MSI mode */
+- disable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
+- /* Set the flags for use of restore */
+- dev->msi_enabled = 1;
+ return 0;
+ }
+
+-void pci_restore_msi_state(struct pci_dev *dev)
++#ifdef CONFIG_PM
++static void __pci_restore_msi_state(struct pci_dev *dev)
+ {
+- int pos, pirq;
+-
+- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+- if (pos <= 0)
+- return;
++ int pirq;
+
+ if (!dev->msi_enabled)
+ return;
+@@ -321,40 +279,12 @@ void pci_restore_msi_state(struct pci_de
+ pirq = msi_map_pirq_to_vector(dev, dev->irq, 0, 0);
+ if (pirq < 0)
+ return;
+- enable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
+-}
+-
+-int pci_save_msix_state(struct pci_dev *dev)
+-{
+- int pos;
+- unsigned long flags;
+- struct msi_dev_list *msi_dev_entry;
+- struct msi_pirq_entry *pirq_entry, *tmp;
+
+- pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+- if (pos <= 0 || dev->no_msi)
+- return 0;
+-
+- /* save the capability */
+- if (!dev->msix_enabled)
+- return 0;
+-
+- msi_dev_entry = get_msi_dev_pirq_list(dev);
+-
+- spin_lock_irqsave(&msi_dev_entry->pirq_list_lock, flags);
+- list_for_each_entry_safe(pirq_entry, tmp,
+- &msi_dev_entry->pirq_list_head, list)
+- msi_unmap_pirq(dev, pirq_entry->pirq);
+- spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
+-
+- disable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
+- /* Set the flags for use of restore */
+- dev->msix_enabled = 1;
+-
+- return 0;
++ pci_intx(dev, 0); /* disable intx */
++ msi_set_enable(dev, 0);
+ }
+
+-void pci_restore_msix_state(struct pci_dev *dev)
++static void __pci_restore_msix_state(struct pci_dev *dev)
+ {
+ int pos;
+ unsigned long flags;
+@@ -387,9 +317,16 @@ void pci_restore_msix_state(struct pci_d
+ }
+ spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
+
+- enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
++ pci_intx(dev, 0); /* disable intx */
++ msix_set_enable(dev, 0);
+ }
+-#endif
++
++void pci_restore_msi_state(struct pci_dev *dev)
++{
++ __pci_restore_msi_state(dev);
++ __pci_restore_msix_state(dev);
++}
++#endif /* CONFIG_PM */
+
+ /**
+ * msi_capability_init - configure device's MSI capability structure
+@@ -405,6 +342,8 @@ static int msi_capability_init(struct pc
+ int pos, pirq;
+ u16 control;
+
++ msi_set_enable(dev, 0); /* Ensure msi is disabled as I set it up */
++
+ pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+ pci_read_config_word(dev, msi_control_reg(pos), &control);
+
+@@ -413,7 +352,8 @@ static int msi_capability_init(struct pc
+ return -EBUSY;
+
+ /* Set MSI enabled bits */
+- enable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
++ pci_intx(dev, 0); /* disable intx */
++ msi_set_enable(dev, 1);
+ dev->msi_enabled = 1;
+
+ dev->irq = pirq;
+@@ -441,6 +381,8 @@ static int msix_capability_init(struct p
+ if (!msi_dev_entry)
+ return -ENOMEM;
+
++ msix_set_enable(dev, 0);/* Ensure msix is disabled as I set it up */
++
+ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+ table_base = find_table_base(dev, pos);
+ if (!table_base)
+@@ -484,7 +426,8 @@ static int msix_capability_init(struct p
+ return avail;
+ }
+
+- enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
++ pci_intx(dev, 0); /* disable intx */
++ msix_set_enable(dev, 1);
+ dev->msix_enabled = 1;
+
+ return 0;
+@@ -572,17 +515,14 @@ int pci_enable_msi(struct pci_dev* dev)
+ /* Check whether driver already requested for MSI-X irqs */
+ if (dev->msix_enabled) {
+ printk(KERN_INFO "PCI: %s: Can't enable MSI. "
+- "Device already has MSI-X irq assigned\n",
+- pci_name(dev));
+- dev->irq = temp;
++ "Device already has MSI-X enabled\n",
++ pci_name(dev));
+ return -EINVAL;
+ }
+
+ status = msi_capability_init(dev);
+ if ( !status )
+ dev->irq_old = temp;
+- else
+- dev->irq = temp;
+
+ return status;
+ }
+@@ -590,7 +530,6 @@ int pci_enable_msi(struct pci_dev* dev)
+ extern void pci_frontend_disable_msi(struct pci_dev* dev);
+ void pci_disable_msi(struct pci_dev* dev)
+ {
+- int pos;
+ int pirq;
+
+ if (!pci_msi_enable)
+@@ -607,8 +546,7 @@ void pci_disable_msi(struct pci_dev* dev
+ }
+ #endif
+
+- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+- if (!pos)
++ if (!dev->msi_enabled)
+ return;
+
+ pirq = dev->irq;
+@@ -617,7 +555,9 @@ void pci_disable_msi(struct pci_dev* dev
+ msi_unmap_pirq(dev, pirq);
+
+ /* Disable MSI mode */
+- disable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
++ msi_set_enable(dev, 0);
++ pci_intx(dev, 1); /* enable intx */
++ dev->msi_enabled = 0;
+ }
+
+ /**
+@@ -710,7 +650,6 @@ int pci_enable_msix(struct pci_dev* dev,
+ printk(KERN_INFO "PCI: %s: Can't enable MSI-X. "
+ "Device already has an MSI irq assigned\n",
+ pci_name(dev));
+- dev->irq = temp;
+ return -EINVAL;
+ }
+
+@@ -718,8 +657,6 @@ int pci_enable_msix(struct pci_dev* dev,
+
+ if ( !status )
+ dev->irq_old = temp;
+- else
+- dev->irq = temp;
+
+ return status;
+ }
+@@ -727,10 +664,6 @@ int pci_enable_msix(struct pci_dev* dev,
+ extern void pci_frontend_disable_msix(struct pci_dev* dev);
+ void pci_disable_msix(struct pci_dev* dev)
+ {
+- int pos;
+- u16 control;
+-
+-
+ if (!pci_msi_enable)
+ return;
+ if (!dev)
+@@ -756,18 +689,15 @@ void pci_disable_msix(struct pci_dev* de
+ }
+ #endif
+
+- pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+- if (!pos)
+- return;
+-
+- pci_read_config_word(dev, msi_control_reg(pos), &control);
+- if (!(control & PCI_MSIX_FLAGS_ENABLE))
++ if (!dev->msix_enabled)
+ return;
+
+ msi_remove_pci_irq_vectors(dev);
+
+ /* Disable MSI mode */
+- disable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
++ msix_set_enable(dev, 0);
++ pci_intx(dev, 1); /* enable intx */
++ dev->msix_enabled = 0;
+ }
+
+ /**
+--- a/drivers/xen/balloon/sysfs.c
++++ b/drivers/xen/balloon/sysfs.c
+@@ -34,6 +34,7 @@
+ #include <linux/stat.h>
+ #include <linux/string.h>
+ #include <linux/sysdev.h>
++#include <linux/module.h>
+ #include "common.h"
+
+ #ifdef HAVE_XEN_PLATFORM_COMPAT_H
+--- a/drivers/xen/blkback/xenbus.c
++++ b/drivers/xen/blkback/xenbus.c
+@@ -527,7 +527,6 @@ static const struct xenbus_device_id blk
+
+ static struct xenbus_driver blkback = {
+ .name = "vbd",
+- .owner = THIS_MODULE,
+ .ids = blkback_ids,
+ .probe = blkback_probe,
+ .remove = blkback_remove,
+@@ -537,5 +536,6 @@ static struct xenbus_driver blkback = {
+
+ void blkif_xenbus_init(void)
+ {
+- xenbus_register_backend(&blkback);
++ if (xenbus_register_backend(&blkback))
++ BUG();
+ }
+--- a/drivers/xen/blkfront/blkfront.c
++++ b/drivers/xen/blkfront/blkfront.c
+@@ -907,7 +907,6 @@ MODULE_ALIAS("xen:vbd");
+
+ static struct xenbus_driver blkfront = {
+ .name = "vbd",
+- .owner = THIS_MODULE,
+ .ids = blkfront_ids,
+ .probe = blkfront_probe,
+ .remove = blkfront_remove,
+--- a/drivers/xen/blktap/xenbus.c
++++ b/drivers/xen/blktap/xenbus.c
+@@ -465,7 +465,6 @@ static const struct xenbus_device_id blk
+
+ static struct xenbus_driver blktap = {
+ .name = "tap",
+- .owner = THIS_MODULE,
+ .ids = blktap_ids,
+ .probe = blktap_probe,
+ .remove = blktap_remove,
+@@ -475,5 +474,6 @@ static struct xenbus_driver blktap = {
+
+ void tap_blkif_xenbus_init(void)
+ {
+- xenbus_register_backend(&blktap);
++ if (xenbus_register_backend(&blktap))
++ BUG();
+ }
+--- a/drivers/xen/core/evtchn.c
++++ b/drivers/xen/core/evtchn.c
+@@ -144,7 +144,7 @@ static void bind_evtchn_to_cpu(unsigned
+ BUG_ON(!test_bit(chn, s->evtchn_mask));
+
+ if (irq != -1)
+- set_native_irq_info(irq, cpumask_of_cpu(cpu));
++ irq_desc[irq].affinity = cpumask_of_cpu(cpu);
+
+ clear_bit(chn, (unsigned long *)cpu_evtchn_mask[cpu_evtchn[chn]]);
+ set_bit(chn, (unsigned long *)cpu_evtchn_mask[cpu]);
+@@ -157,7 +157,7 @@ static void init_evtchn_cpu_bindings(voi
+
+ /* By default all event channels notify CPU#0. */
+ for (i = 0; i < NR_IRQS; i++)
+- set_native_irq_info(i, cpumask_of_cpu(0));
++ irq_desc[i].affinity = cpumask_of_cpu(0);
+
+ memset(cpu_evtchn, 0, sizeof(cpu_evtchn));
+ memset(cpu_evtchn_mask[0], ~0, sizeof(cpu_evtchn_mask[0]));
+--- a/drivers/xen/core/smpboot.c
++++ b/drivers/xen/core/smpboot.c
+@@ -121,7 +121,7 @@ static int __cpuinit xen_smp_intr_init(u
+ rc = bind_ipi_to_irqhandler(RESCHEDULE_VECTOR,
+ cpu,
+ smp_reschedule_interrupt,
+- SA_INTERRUPT,
++ IRQF_DISABLED|IRQF_NOBALANCING,
+ resched_name[cpu],
+ NULL);
+ if (rc < 0)
+@@ -132,7 +132,7 @@ static int __cpuinit xen_smp_intr_init(u
+ rc = bind_ipi_to_irqhandler(CALL_FUNCTION_VECTOR,
+ cpu,
+ smp_call_function_interrupt,
+- SA_INTERRUPT,
++ IRQF_DISABLED|IRQF_NOBALANCING,
+ callfunc_name[cpu],
+ NULL);
+ if (rc < 0)
+@@ -261,7 +261,7 @@ void __init smp_prepare_cpus(unsigned in
+ {
+ unsigned int cpu;
+ struct task_struct *idle;
+- int apicid, acpiid;
++ int apicid;
+ struct vcpu_get_physid cpu_id;
+ #ifdef __x86_64__
+ struct desc_ptr *gdt_descr;
+@@ -270,14 +270,8 @@ void __init smp_prepare_cpus(unsigned in
+ #endif
+
+ apicid = 0;
+- if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, 0, &cpu_id) == 0) {
++ if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, 0, &cpu_id) == 0)
+ apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id);
+- acpiid = xen_vcpu_physid_to_x86_acpiid(cpu_id.phys_id);
+-#ifdef CONFIG_ACPI
+- if (acpiid != 0xff)
+- x86_acpiid_to_apicid[acpiid] = apicid;
+-#endif
+- }
+ boot_cpu_data.apicid = apicid;
+ cpu_data[0] = boot_cpu_data;
+
+@@ -333,14 +327,8 @@ void __init smp_prepare_cpus(unsigned in
+ XENFEAT_writable_descriptor_tables);
+
+ apicid = cpu;
+- if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, cpu, &cpu_id) == 0) {
++ if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, cpu, &cpu_id) == 0)
+ apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id);
+- acpiid = xen_vcpu_physid_to_x86_acpiid(cpu_id.phys_id);
+-#ifdef CONFIG_ACPI
+- if (acpiid != 0xff)
+- x86_acpiid_to_apicid[acpiid] = apicid;
+-#endif
+- }
+ cpu_data[cpu] = boot_cpu_data;
+ cpu_data[cpu].apicid = apicid;
+
+--- a/drivers/xen/fbfront/xenfb.c
++++ b/drivers/xen/fbfront/xenfb.c
+@@ -856,7 +856,6 @@ MODULE_ALIAS("xen:vfb");
+
+ static struct xenbus_driver xenfb_driver = {
+ .name = "vfb",
+- .owner = THIS_MODULE,
+ .ids = xenfb_ids,
+ .probe = xenfb_probe,
+ .remove = xenfb_remove,
+--- a/drivers/xen/fbfront/xenkbd.c
++++ b/drivers/xen/fbfront/xenkbd.c
+@@ -323,7 +323,6 @@ MODULE_ALIAS("xen:vkbd");
+
+ static struct xenbus_driver xenkbd_driver = {
+ .name = "vkbd",
+- .owner = THIS_MODULE,
+ .ids = xenkbd_ids,
+ .probe = xenkbd_probe,
+ .remove = xenkbd_remove,
+--- a/drivers/xen/netback/xenbus.c
++++ b/drivers/xen/netback/xenbus.c
+@@ -439,7 +439,6 @@ static const struct xenbus_device_id net
+
+ static struct xenbus_driver netback = {
+ .name = "vif",
+- .owner = THIS_MODULE,
+ .ids = netback_ids,
+ .probe = netback_probe,
+ .remove = netback_remove,
+@@ -450,5 +449,6 @@ static struct xenbus_driver netback = {
+
+ void netif_xenbus_init(void)
+ {
+- xenbus_register_backend(&netback);
++ if (xenbus_register_backend(&netback))
++ BUG();
+ }
+--- a/drivers/xen/netfront/netfront.c
++++ b/drivers/xen/netfront/netfront.c
+@@ -1892,20 +1892,19 @@ static struct ethtool_ops network_ethtoo
+ };
+
+ #ifdef CONFIG_SYSFS
+-static ssize_t show_rxbuf_min(struct class_device *cd, char *buf)
++static ssize_t show_rxbuf_min(struct device *dev,
++ struct device_attribute *attr, char *buf)
+ {
+- struct net_device *netdev = container_of(cd, struct net_device,
+- class_dev);
+- struct netfront_info *info = netdev_priv(netdev);
++ struct netfront_info *info = netdev_priv(to_net_dev(dev));
+
+ return sprintf(buf, "%u\n", info->rx_min_target);
+ }
+
+-static ssize_t store_rxbuf_min(struct class_device *cd,
++static ssize_t store_rxbuf_min(struct device *dev,
++ struct device_attribute *attr,
+ const char *buf, size_t len)
+ {
+- struct net_device *netdev = container_of(cd, struct net_device,
+- class_dev);
++ struct net_device *netdev = to_net_dev(dev);
+ struct netfront_info *np = netdev_priv(netdev);
+ char *endp;
+ unsigned long target;
+@@ -1935,20 +1934,19 @@ static ssize_t store_rxbuf_min(struct cl
+ return len;
+ }
+
+-static ssize_t show_rxbuf_max(struct class_device *cd, char *buf)
++static ssize_t show_rxbuf_max(struct device *dev,
++ struct device_attribute *attr, char *buf)
+ {
+- struct net_device *netdev = container_of(cd, struct net_device,
+- class_dev);
+- struct netfront_info *info = netdev_priv(netdev);
++ struct netfront_info *info = netdev_priv(to_net_dev(dev));
+
+ return sprintf(buf, "%u\n", info->rx_max_target);
+ }
+
+-static ssize_t store_rxbuf_max(struct class_device *cd,
++static ssize_t store_rxbuf_max(struct device *dev,
++ struct device_attribute *attr,
+ const char *buf, size_t len)
+ {
+- struct net_device *netdev = container_of(cd, struct net_device,
+- class_dev);
++ struct net_device *netdev = to_net_dev(dev);
+ struct netfront_info *np = netdev_priv(netdev);
+ char *endp;
+ unsigned long target;
+@@ -1978,16 +1976,15 @@ static ssize_t store_rxbuf_max(struct cl
+ return len;
+ }
+
+-static ssize_t show_rxbuf_cur(struct class_device *cd, char *buf)
++static ssize_t show_rxbuf_cur(struct device *dev,
++ struct device_attribute *attr, char *buf)
+ {
+- struct net_device *netdev = container_of(cd, struct net_device,
+- class_dev);
+- struct netfront_info *info = netdev_priv(netdev);
++ struct netfront_info *info = netdev_priv(to_net_dev(dev));
+
+ return sprintf(buf, "%u\n", info->rx_target);
+ }
+
+-static const struct class_device_attribute xennet_attrs[] = {
++static struct device_attribute xennet_attrs[] = {
+ __ATTR(rxbuf_min, S_IRUGO|S_IWUSR, show_rxbuf_min, store_rxbuf_min),
+ __ATTR(rxbuf_max, S_IRUGO|S_IWUSR, show_rxbuf_max, store_rxbuf_max),
+ __ATTR(rxbuf_cur, S_IRUGO, show_rxbuf_cur, NULL),
+@@ -1999,8 +1996,8 @@ static int xennet_sysfs_addif(struct net
+ int error = 0;
+
+ for (i = 0; i < ARRAY_SIZE(xennet_attrs); i++) {
+- error = class_device_create_file(&netdev->class_dev,
+- &xennet_attrs[i]);
++ error = device_create_file(&netdev->dev,
++ &xennet_attrs[i]);
+ if (error)
+ goto fail;
+ }
+@@ -2008,8 +2005,7 @@ static int xennet_sysfs_addif(struct net
+
+ fail:
+ while (--i >= 0)
+- class_device_remove_file(&netdev->class_dev,
+- &xennet_attrs[i]);
++ device_remove_file(&netdev->dev, &xennet_attrs[i]);
+ return error;
+ }
+
+@@ -2017,10 +2013,8 @@ static void xennet_sysfs_delif(struct ne
+ {
+ int i;
+
+- for (i = 0; i < ARRAY_SIZE(xennet_attrs); i++) {
+- class_device_remove_file(&netdev->class_dev,
+- &xennet_attrs[i]);
+- }
++ for (i = 0; i < ARRAY_SIZE(xennet_attrs); i++)
++ device_remove_file(&netdev->dev, &xennet_attrs[i]);
+ }
+
+ #endif /* CONFIG_SYSFS */
+@@ -2186,7 +2180,6 @@ MODULE_ALIAS("xen:vif");
+
+ static struct xenbus_driver netfront_driver = {
+ .name = "vif",
+- .owner = THIS_MODULE,
+ .ids = netfront_ids,
+ .probe = netfront_probe,
+ .remove = __devexit_p(netfront_remove),
+--- a/drivers/xen/pciback/xenbus.c
++++ b/drivers/xen/pciback/xenbus.c
+@@ -682,7 +682,6 @@ static const struct xenbus_device_id xen
+
+ static struct xenbus_driver xenbus_pciback_driver = {
+ .name = "pciback",
+- .owner = THIS_MODULE,
+ .ids = xenpci_ids,
+ .probe = pciback_xenbus_probe,
+ .remove = pciback_xenbus_remove,
+--- a/drivers/xen/pcifront/xenbus.c
++++ b/drivers/xen/pcifront/xenbus.c
+@@ -436,7 +436,6 @@ MODULE_ALIAS("xen:pci");
+
+ static struct xenbus_driver xenbus_pcifront_driver = {
+ .name = "pcifront",
+- .owner = THIS_MODULE,
+ .ids = xenpci_ids,
+ .probe = pcifront_xenbus_probe,
+ .remove = pcifront_xenbus_remove,
+--- a/drivers/xen/scsiback/xenbus.c
++++ b/drivers/xen/scsiback/xenbus.c
+@@ -350,7 +350,6 @@ static struct xenbus_device_id scsiback_
+
+ static struct xenbus_driver scsiback = {
+ .name = "vscsi",
+- .owner = THIS_MODULE,
+ .ids = scsiback_ids,
+ .probe = scsiback_probe,
+ .remove = scsiback_remove,
+--- a/drivers/xen/scsifront/xenbus.c
++++ b/drivers/xen/scsifront/xenbus.c
+@@ -401,7 +401,6 @@ static struct xenbus_device_id scsifront
+
+ static struct xenbus_driver scsifront_driver = {
+ .name = "vscsi",
+- .owner = THIS_MODULE,
+ .ids = scsifront_ids,
+ .probe = scsifront_probe,
+ .remove = scsifront_remove,
+--- a/drivers/xen/tpmback/common.h
++++ b/drivers/xen/tpmback/common.h
+@@ -54,11 +54,11 @@ typedef struct tpmif_st {
+
+ void tpmif_disconnect_complete(tpmif_t * tpmif);
+ tpmif_t *tpmif_find(domid_t domid, struct backend_info *bi);
+-void tpmif_interface_init(void);
++int tpmif_interface_init(void);
+ void tpmif_interface_exit(void);
+ void tpmif_schedule_work(tpmif_t * tpmif);
+ void tpmif_deschedule_work(tpmif_t * tpmif);
+-void tpmif_xenbus_init(void);
++int tpmif_xenbus_init(void);
+ void tpmif_xenbus_exit(void);
+ int tpmif_map(tpmif_t *tpmif, unsigned long shared_page, unsigned int evtchn);
+ irqreturn_t tpmif_be_int(int irq, void *dev_id);
+--- a/drivers/xen/tpmback/interface.c
++++ b/drivers/xen/tpmback/interface.c
+@@ -156,13 +156,14 @@ void tpmif_disconnect_complete(tpmif_t *
+ free_tpmif(tpmif);
+ }
+
+-void __init tpmif_interface_init(void)
++int __init tpmif_interface_init(void)
+ {
+ tpmif_cachep = kmem_cache_create("tpmif_cache", sizeof (tpmif_t),
+ 0, 0, NULL, NULL);
++ return tpmif_cachep ? 0 : -ENOMEM;
+ }
+
+-void __exit tpmif_interface_exit(void)
++void tpmif_interface_exit(void)
+ {
+ kmem_cache_destroy(tpmif_cachep);
+ }
+--- a/drivers/xen/tpmback/tpmback.c
++++ b/drivers/xen/tpmback/tpmback.c
+@@ -923,22 +923,30 @@ static int __init tpmback_init(void)
+ spin_lock_init(&tpm_schedule_list_lock);
+ INIT_LIST_HEAD(&tpm_schedule_list);
+
+- tpmif_interface_init();
+- tpmif_xenbus_init();
++ rc = tpmif_interface_init();
++ if (!rc) {
++ rc = tpmif_xenbus_init();
++ if (rc)
++ tpmif_interface_exit();
++ }
++ if (rc) {
++ misc_deregister(&vtpms_miscdevice);
++ return rc;
++ }
+
+ printk(KERN_ALERT "Successfully initialized TPM backend driver.\n");
+
+ return 0;
+ }
+-
+ module_init(tpmback_init);
+
+-void __exit tpmback_exit(void)
++static void __exit tpmback_exit(void)
+ {
+ vtpm_release_packets(NULL, 0);
+ tpmif_xenbus_exit();
+ tpmif_interface_exit();
+ misc_deregister(&vtpms_miscdevice);
+ }
++module_exit(tpmback_exit)
+
+ MODULE_LICENSE("Dual BSD/GPL");
+--- a/drivers/xen/tpmback/xenbus.c
++++ b/drivers/xen/tpmback/xenbus.c
+@@ -270,7 +270,6 @@ static const struct xenbus_device_id tpm
+
+ static struct xenbus_driver tpmback = {
+ .name = "vtpm",
+- .owner = THIS_MODULE,
+ .ids = tpmback_ids,
+ .probe = tpmback_probe,
+ .remove = tpmback_remove,
+@@ -278,9 +277,9 @@ static struct xenbus_driver tpmback = {
+ };
+
+
+-void tpmif_xenbus_init(void)
++int tpmif_xenbus_init(void)
+ {
+- xenbus_register_backend(&tpmback);
++ return xenbus_register_backend(&tpmback);
+ }
+
+ void tpmif_xenbus_exit(void)
+--- a/drivers/xen/xenbus/xenbus_probe_backend.c
++++ b/drivers/xen/xenbus/xenbus_probe_backend.c
+@@ -172,13 +172,15 @@ static int xenbus_uevent_backend(struct
+ return 0;
+ }
+
+-int xenbus_register_backend(struct xenbus_driver *drv)
++int __xenbus_register_backend(struct xenbus_driver *drv,
++ struct module *owner, const char *mod_name)
+ {
+ drv->read_otherend_details = read_frontend_details;
+
+- return xenbus_register_driver_common(drv, &xenbus_backend);
++ return xenbus_register_driver_common(drv, &xenbus_backend,
++ owner, mod_name);
+ }
+-EXPORT_SYMBOL_GPL(xenbus_register_backend);
++EXPORT_SYMBOL_GPL(__xenbus_register_backend);
+
+ /* backend/<typename>/<frontend-uuid>/<name> */
+ static int xenbus_probe_backend_unit(const char *dir,
+--- a/drivers/xen/xenbus/xenbus_probe.c
++++ b/drivers/xen/xenbus/xenbus_probe.c
+@@ -365,7 +365,9 @@ static void xenbus_dev_shutdown(struct d
+ }
+
+ int xenbus_register_driver_common(struct xenbus_driver *drv,
+- struct xen_bus_type *bus)
++ struct xen_bus_type *bus,
++ struct module *owner,
++ const char *mod_name)
+ {
+ int ret;
+
+@@ -375,7 +377,10 @@ int xenbus_register_driver_common(struct
+ drv->driver.name = drv->name;
+ drv->driver.bus = &bus->bus;
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10)
+- drv->driver.owner = drv->owner;
++ drv->driver.owner = owner;
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
++ drv->driver.mod_name = mod_name;
+ #endif
+ #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
+ drv->driver.probe = xenbus_dev_probe;
+@@ -389,13 +394,15 @@ int xenbus_register_driver_common(struct
+ return ret;
+ }
+
+-int xenbus_register_frontend(struct xenbus_driver *drv)
++int __xenbus_register_frontend(struct xenbus_driver *drv,
++ struct module *owner, const char *mod_name)
+ {
+ int ret;
+
+ drv->read_otherend_details = read_backend_details;
+
+- ret = xenbus_register_driver_common(drv, &xenbus_frontend);
++ ret = xenbus_register_driver_common(drv, &xenbus_frontend,
++ owner, mod_name);
+ if (ret)
+ return ret;
+
+@@ -404,7 +411,7 @@ int xenbus_register_frontend(struct xenb
+
+ return 0;
+ }
+-EXPORT_SYMBOL_GPL(xenbus_register_frontend);
++EXPORT_SYMBOL_GPL(__xenbus_register_frontend);
+
+ void xenbus_unregister_driver(struct xenbus_driver *drv)
+ {
+--- a/drivers/xen/xenbus/xenbus_probe.h
++++ b/drivers/xen/xenbus/xenbus_probe.h
+@@ -63,7 +63,9 @@ extern int xenbus_match(struct device *_
+ extern int xenbus_dev_probe(struct device *_dev);
+ extern int xenbus_dev_remove(struct device *_dev);
+ extern int xenbus_register_driver_common(struct xenbus_driver *drv,
+- struct xen_bus_type *bus);
++ struct xen_bus_type *bus,
++ struct module *owner,
++ const char *mod_name);
+ extern int xenbus_probe_node(struct xen_bus_type *bus,
+ const char *type,
+ const char *nodename);
+--- a/drivers/xen/xenoprof/xenoprofile.c
++++ b/drivers/xen/xenoprof/xenoprofile.c
+@@ -235,7 +235,7 @@ static int bind_virq(void)
+ result = bind_virq_to_irqhandler(VIRQ_XENOPROF,
+ i,
+ xenoprof_ovf_interrupt,
+- SA_INTERRUPT,
++ IRQF_DISABLED|IRQF_NOBALANCING,
+ "xenoprof",
+ NULL);
+
+--- a/include/asm-x86/i8253.h
++++ b/include/asm-x86/i8253.h
+@@ -8,10 +8,14 @@
+
+ extern spinlock_t i8253_lock;
+
++#ifdef CONFIG_GENERIC_CLOCKEVENTS
++
+ extern struct clock_event_device *global_clock_event;
+
+ extern void setup_pit_timer(void);
+
++#endif
++
+ #define inb_pit inb_p
+ #define outb_pit outb_p
+
+--- a/include/asm-x86/mach-xen/asm/desc_32.h
++++ b/include/asm-x86/mach-xen/asm/desc_32.h
+@@ -21,7 +21,7 @@ struct Xgt_desc_struct {
+
+ extern struct Xgt_desc_struct idt_descr;
+ DECLARE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
+-
++extern struct Xgt_desc_struct early_gdt_descr;
+
+ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+ {
+--- a/include/asm-x86/mach-xen/asm/dma-mapping_64.h
++++ b/include/asm-x86/mach-xen/asm/dma-mapping_64.h
+@@ -9,7 +9,6 @@
+
+ #include <asm/scatterlist.h>
+ #include <asm/io.h>
+-#include <asm/swiotlb.h>
+
+ struct dma_mapping_ops {
+ int (*mapping_error)(dma_addr_t dma_addr);
+@@ -67,6 +66,9 @@ static inline int dma_mapping_error(dma_
+ #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+ #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+
++#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
++#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
++
+ extern void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp);
+ extern void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+--- a/include/asm-x86/mach-xen/asm/hypervisor.h
++++ b/include/asm-x86/mach-xen/asm/hypervisor.h
+@@ -158,6 +158,19 @@ static inline void arch_leave_lazy_mmu_m
+ #define arch_use_lazy_mmu_mode() unlikely(__get_cpu_var(xen_lazy_mmu))
+ #endif
+
++#if 0 /* All uses are in places potentially called asynchronously, but
++ * asynchronous code should rather not make use of lazy mode at all.
++ * Therefore, all uses of this function get commented out, proper
++ * detection of asynchronous invocations is added whereever needed,
++ * and this function is disabled to catch any new (improper) uses.
++ */
++static inline void arch_flush_lazy_mmu_mode(void)
++{
++ if (arch_use_lazy_mmu_mode())
++ xen_multicall_flush(false);
++}
++#endif
++
+ #else /* CONFIG_XEN */
+
+ static inline void xen_multicall_flush(bool ignore) {}
+@@ -215,7 +228,7 @@ HYPERVISOR_block(
+ return rc;
+ }
+
+-static inline void /*__noreturn*/
++static inline void __noreturn
+ HYPERVISOR_shutdown(
+ unsigned int reason)
+ {
+--- a/include/asm-x86/mach-xen/asm/io_32.h
++++ b/include/asm-x86/mach-xen/asm/io_32.h
+@@ -232,12 +232,6 @@ static inline void memcpy_toio(volatile
+ #define __ISA_IO_base ((char __iomem *)(fix_to_virt(FIX_ISAMAP_BEGIN)))
+
+ /*
+- * Again, i386 does not require mem IO specific function.
+- */
+-
+-#define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void __force *)(b),(c),(d))
+-
+-/*
+ * Cache management
+ *
+ * This needed for two cases
+--- a/include/asm-x86/mach-xen/asm/io_64.h
++++ b/include/asm-x86/mach-xen/asm/io_64.h
+@@ -101,7 +101,7 @@ __OUTS(l)
+
+ #define IO_SPACE_LIMIT 0xffff
+
+-#if defined(__KERNEL__) && __x86_64__
++#if defined(__KERNEL__) && defined(__x86_64__)
+
+ #include <linux/vmalloc.h>
+
+@@ -267,12 +267,6 @@ void memset_io(volatile void __iomem *a,
+ */
+ #define __ISA_IO_base ((char __iomem *)(fix_to_virt(FIX_ISAMAP_BEGIN)))
+
+-/*
+- * Again, x86-64 does not require mem IO specific function.
+- */
+-
+-#define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void *)(b),(c),(d))
+-
+ /* Nothing to do */
+
+ #define dma_cache_inv(_start,_size) do { } while (0)
+--- a/include/asm-x86/mach-xen/asm/mmu_context_32.h
++++ b/include/asm-x86/mach-xen/asm/mmu_context_32.h
+@@ -27,13 +27,13 @@ static inline void enter_lazy_tlb(struct
+ static inline void __prepare_arch_switch(void)
+ {
+ /*
+- * Save away %fs. No need to save %gs, as it was saved on the
++ * Save away %gs. No need to save %fs, as it was saved on the
+ * stack on entry. No need to save %es and %ds, as those are
+ * always kernel segments while inside the kernel.
+ */
+- asm volatile ( "mov %%fs,%0"
+- : "=m" (current->thread.fs));
+- asm volatile ( "movl %0,%%fs"
++ asm volatile ( "mov %%gs,%0"
++ : "=m" (current->thread.gs));
++ asm volatile ( "movl %0,%%gs"
+ : : "r" (0) );
+ }
+
+@@ -95,7 +95,7 @@ static inline void switch_mm(struct mm_s
+ }
+
+ #define deactivate_mm(tsk, mm) \
+- asm("movl %0,%%fs": :"r" (0));
++ asm("movl %0,%%gs": :"r" (0));
+
+ static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
+ {
+--- a/include/asm-x86/mach-xen/asm/pgalloc_32.h
++++ b/include/asm-x86/mach-xen/asm/pgalloc_32.h
+@@ -6,12 +6,23 @@
+ #include <linux/mm.h> /* for struct page */
+ #include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
+
+-#define pmd_populate_kernel(mm, pmd, pte) \
+- set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
++#define paravirt_alloc_pt(pfn) do { } while (0)
++#define paravirt_alloc_pd(pfn) do { } while (0)
++#define paravirt_alloc_pd(pfn) do { } while (0)
++#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
++#define paravirt_release_pt(pfn) do { } while (0)
++#define paravirt_release_pd(pfn) do { } while (0)
++
++#define pmd_populate_kernel(mm, pmd, pte) \
++do { \
++ paravirt_alloc_pt(__pa(pte) >> PAGE_SHIFT); \
++ set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \
++} while (0)
+
+ #define pmd_populate(mm, pmd, pte) \
+ do { \
+ unsigned long pfn = page_to_pfn(pte); \
++ paravirt_alloc_pt(pfn); \
+ if (test_bit(PG_pinned, &virt_to_page((mm)->pgd)->flags)) { \
+ if (!PageHighMem(pte)) \
+ BUG_ON(HYPERVISOR_update_va_mapping( \
+@@ -42,7 +53,11 @@ static inline void pte_free_kernel(pte_t
+
+ extern void pte_free(struct page *pte);
+
+-#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
++#define __pte_free_tlb(tlb,pte) \
++do { \
++ paravirt_release_pt(page_to_pfn(pte)); \
++ tlb_remove_page((tlb),(pte)); \
++} while (0)
+
+ #ifdef CONFIG_X86_PAE
+ /*
+--- a/include/asm-x86/mach-xen/asm/pgtable_32.h
++++ b/include/asm-x86/mach-xen/asm/pgtable_32.h
+@@ -275,6 +275,7 @@ static inline pte_t pte_mkhuge(pte_t pte
+ */
+ #define pte_update(mm, addr, ptep) do { } while (0)
+ #define pte_update_defer(mm, addr, ptep) do { } while (0)
++#define paravirt_map_pt_hook(slot, va, pfn) do { } while (0)
+
+ /*
+ * We only update the dirty/accessed state if we set
+@@ -490,12 +491,24 @@ extern pte_t *lookup_address(unsigned lo
+ #endif
+
+ #if defined(CONFIG_HIGHPTE)
+-#define pte_offset_map(dir, address) \
+- ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + \
+- pte_index(address))
+-#define pte_offset_map_nested(dir, address) \
+- ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + \
+- pte_index(address))
++#define pte_offset_map(dir, address) \
++({ \
++ pte_t *__ptep; \
++ unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \
++ __ptep = (pte_t *)kmap_atomic_pte(pfn_to_page(pfn),KM_PTE0); \
++ paravirt_map_pt_hook(KM_PTE0,__ptep, pfn); \
++ __ptep = __ptep + pte_index(address); \
++ __ptep; \
++})
++#define pte_offset_map_nested(dir, address) \
++({ \
++ pte_t *__ptep; \
++ unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \
++ __ptep = (pte_t *)kmap_atomic_pte(pfn_to_page(pfn),KM_PTE1); \
++ paravirt_map_pt_hook(KM_PTE1,__ptep, pfn); \
++ __ptep = __ptep + pte_index(address); \
++ __ptep; \
++})
+ #define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
+ #define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
+ #else
+--- a/include/asm-x86/mach-xen/asm/pgtable_64.h
++++ b/include/asm-x86/mach-xen/asm/pgtable_64.h
+@@ -414,15 +414,6 @@ static inline int pmd_large(pmd_t pte) {
+ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+ #define mk_pte_huge(entry) (__pte_val(entry) |= _PAGE_PRESENT | _PAGE_PSE)
+
+-/* physical address -> PTE */
+-static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot)
+-{
+- unsigned long pteval;
+- pteval = physpage | pgprot_val(pgprot);
+- pteval &= __supported_pte_mask;
+- return __pte(pteval);
+-}
+-
+ /* Change flags of a PTE */
+ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+ {
+--- a/include/asm-x86/mach-xen/asm/processor_32.h
++++ b/include/asm-x86/mach-xen/asm/processor_32.h
+@@ -431,7 +431,7 @@ struct thread_struct {
+ .vm86_info = NULL, \
+ .sysenter_cs = __KERNEL_CS, \
+ .io_bitmap_ptr = NULL, \
+- .gs = __KERNEL_PDA, \
++ .fs = __KERNEL_PDA, \
+ }
+
+ /*
+@@ -449,8 +449,8 @@ struct thread_struct {
+ }
+
+ #define start_thread(regs, new_eip, new_esp) do { \
+- __asm__("movl %0,%%fs": :"r" (0)); \
+- regs->xgs = 0; \
++ __asm__("movl %0,%%gs": :"r" (0)); \
++ regs->xfs = 0; \
+ set_fs(USER_DS); \
+ regs->xds = __USER_DS; \
+ regs->xes = __USER_DS; \
+--- a/include/asm-x86/mach-xen/asm/segment_32.h
++++ b/include/asm-x86/mach-xen/asm/segment_32.h
+@@ -83,14 +83,8 @@
+ * The GDT has 32 entries
+ */
+ #define GDT_ENTRIES 32
+-
+ #define GDT_SIZE (GDT_ENTRIES * 8)
+
+-/* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */
+-#define SEGMENT_IS_FLAT_CODE(x) (((x) & 0xec) == GDT_ENTRY_KERNEL_CS * 8)
+-/* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
+-#define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8)
+-
+ /* Simple and small GDT entries for booting only */
+
+ #define GDT_ENTRY_BOOT_CS 2
+@@ -132,4 +126,21 @@
+ #define SEGMENT_GDT 0x0
+
+ #define get_kernel_rpl() (xen_feature(XENFEAT_supervisor_mode_kernel)?0:1)
++
++/*
++ * Matching rules for certain types of segments.
++ */
++
++/* Matches only __KERNEL_CS, ignoring PnP / USER / APM segments */
++#define SEGMENT_IS_KERNEL_CODE(x) (((x) & ~3) == GDT_ENTRY_KERNEL_CS * 8 \
++ || ((x) & ~3) == (FLAT_KERNEL_CS & ~3))
++
++/* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */
++#define SEGMENT_IS_FLAT_CODE(x) (((x) & ~0x13) == GDT_ENTRY_KERNEL_CS * 8 \
++ || ((x) & ~3) == (FLAT_KERNEL_CS & ~3) \
++ || ((x) & ~3) == (FLAT_USER_CS & ~3))
++
++/* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
++#define SEGMENT_IS_PNP_CODE(x) (((x) & ~0x0b) == GDT_ENTRY_PNPBIOS_BASE * 8)
++
+ #endif
+--- a/include/asm-x86/mach-xen/asm/smp_32.h
++++ b/include/asm-x86/mach-xen/asm/smp_32.h
+@@ -52,6 +52,11 @@ extern void cpu_exit_clear(void);
+ extern void cpu_uninit(void);
+ #endif
+
++#ifndef CONFIG_PARAVIRT
++#define startup_ipi_hook(phys_apicid, start_eip, start_esp) \
++do { } while (0)
++#endif
++
+ /*
+ * This function is needed by all SMP systems. It must _always_ be valid
+ * from the initial startup. We map APIC_BASE very early in page_setup(),
+--- a/include/asm-x86/mach-xen/asm/smp_64.h
++++ b/include/asm-x86/mach-xen/asm/smp_64.h
+@@ -7,6 +7,7 @@
+ #include <linux/threads.h>
+ #include <linux/cpumask.h>
+ #include <linux/bitops.h>
++#include <linux/init.h>
+ extern int disable_apic;
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+@@ -73,7 +74,7 @@ extern int __cpu_disable(void);
+ extern void __cpu_die(unsigned int cpu);
+ extern void prefill_possible_map(void);
+ extern unsigned num_processors;
+-extern unsigned disabled_cpus;
++extern unsigned __cpuinitdata disabled_cpus;
+
+ #define NO_PROC_ID 0xFF /* No processor magic marker */
+
+--- a/include/xen/xenbus.h
++++ b/include/xen/xenbus.h
+@@ -93,8 +93,7 @@ struct xenbus_device_id
+
+ /* A xenbus driver. */
+ struct xenbus_driver {
+- char *name;
+- struct module *owner;
++ const char *name;
+ const struct xenbus_device_id *ids;
+ int (*probe)(struct xenbus_device *dev,
+ const struct xenbus_device_id *id);
+@@ -115,8 +114,25 @@ static inline struct xenbus_driver *to_x
+ return container_of(drv, struct xenbus_driver, driver);
+ }
+
+-int xenbus_register_frontend(struct xenbus_driver *drv);
+-int xenbus_register_backend(struct xenbus_driver *drv);
++int __must_check __xenbus_register_frontend(struct xenbus_driver *drv,
++ struct module *owner,
++ const char *mod_name);
++
++static inline int __must_check
++xenbus_register_frontend(struct xenbus_driver *drv)
++{
++ return __xenbus_register_frontend(drv, THIS_MODULE, KBUILD_MODNAME);
++}
++
++int __must_check __xenbus_register_backend(struct xenbus_driver *drv,
++ struct module *owner,
++ const char *mod_name);
++static inline int __must_check
++xenbus_register_backend(struct xenbus_driver *drv)
++{
++ return __xenbus_register_backend(drv, THIS_MODULE, KBUILD_MODNAME);
++}
++
+ void xenbus_unregister_driver(struct xenbus_driver *drv);
+
+ struct xenbus_transaction
+--- a/lib/swiotlb-xen.c
++++ b/lib/swiotlb-xen.c
+@@ -135,8 +135,8 @@ __setup("swiotlb=", setup_io_tlb_npages)
+ * Statically reserve bounce buffer space and initialize bounce buffer data
+ * structures for the software IO TLB used to implement the PCI DMA API.
+ */
+-void
+-swiotlb_init_with_default_size (size_t default_size)
++void __init
++swiotlb_init_with_default_size(size_t default_size)
+ {
+ unsigned long i, bytes;
+ int rc;
+@@ -221,7 +221,7 @@ swiotlb_init_with_default_size (size_t d
+ dma_bits);
+ }
+
+-void
++void __init
+ swiotlb_init(void)
+ {
+ long ram_end;
+@@ -457,7 +457,7 @@ swiotlb_full(struct device *dev, size_t
+ * When the mapping is small enough return a static buffer to limit
+ * the damage, or panic when the transfer is too big.
+ */
+- printk(KERN_ERR "PCI-DMA: Out of SW-IOMMU space for %lu bytes at "
++ printk(KERN_ERR "PCI-DMA: Out of SW-IOMMU space for %zu bytes at "
+ "device %s\n", (unsigned long)size, dev ? dev->bus_id : "?");
+
+ if (size > io_tlb_overflow && do_panic) {
+@@ -602,7 +602,7 @@ swiotlb_map_sg(struct device *hwdev, str
+ sg[0].dma_length = 0;
+ return 0;
+ }
+- sg->dma_address = (dma_addr_t)virt_to_bus(map);
++ sg->dma_address = virt_to_bus(map);
+ } else
+ sg->dma_address = dev_addr;
+ sg->dma_length = sg->length;
+@@ -624,8 +624,7 @@ swiotlb_unmap_sg(struct device *hwdev, s
+
+ for (i = 0; i < nelems; i++, sg++)
+ if (in_swiotlb_aperture(sg->dma_address))
+- unmap_single(hwdev,
+- (void *)bus_to_virt(sg->dma_address),
++ unmap_single(hwdev, bus_to_virt(sg->dma_address),
+ sg->dma_length, dir);
+ else
+ gnttab_dma_unmap_page(sg->dma_address);
+@@ -648,8 +647,7 @@ swiotlb_sync_sg_for_cpu(struct device *h
+
+ for (i = 0; i < nelems; i++, sg++)
+ if (in_swiotlb_aperture(sg->dma_address))
+- sync_single(hwdev,
+- (void *)bus_to_virt(sg->dma_address),
++ sync_single(hwdev, bus_to_virt(sg->dma_address),
+ sg->dma_length, dir);
+ }
+
+@@ -663,8 +661,7 @@ swiotlb_sync_sg_for_device(struct device
+
+ for (i = 0; i < nelems; i++, sg++)
+ if (in_swiotlb_aperture(sg->dma_address))
+- sync_single(hwdev,
+- (void *)bus_to_virt(sg->dma_address),
++ sync_single(hwdev, bus_to_virt(sg->dma_address),
+ sg->dma_length, dir);
+ }
+
--- /dev/null
+From: www.kernel.org
+Subject: Update to 2.6.22
+Patch-mainline: 2.6.22
+
+Automatically created from "patches.kernel.org/patch-2.6.22" by xen-port-patches.py
+
+Acked-by: jbeulich@novell.com
+
+---
+ arch/x86/Kconfig | 4
+ arch/x86/ia32/ia32entry-xen.S | 18 -
+ arch/x86/kernel/Makefile | 2
+ arch/x86/kernel/acpi/sleep_64-xen.c | 26 -
+ arch/x86/kernel/apic_32-xen.c | 1
+ arch/x86/kernel/apic_64-xen.c | 1
+ arch/x86/kernel/asm-offsets_32.c | 5
+ arch/x86/kernel/cpu/common-xen.c | 224 ++++---------
+ arch/x86/kernel/cpu/mtrr/main-xen.c | 2
+ arch/x86/kernel/e820_32-xen.c | 46 +-
+ arch/x86/kernel/e820_64-xen.c | 28 -
+ arch/x86/kernel/early_printk-xen.c | 27 -
+ arch/x86/kernel/entry_32-xen.S | 30 -
+ arch/x86/kernel/entry_64-xen.S | 7
+ arch/x86/kernel/genapic_64-xen.c | 108 +-----
+ arch/x86/kernel/genapic_xen_64.c | 3
+ arch/x86/kernel/head64-xen.c | 32 +
+ arch/x86/kernel/head_32-xen.S | 101 ------
+ arch/x86/kernel/head_64-xen.S | 52 ---
+ arch/x86/kernel/io_apic_32-xen.c | 43 --
+ arch/x86/kernel/io_apic_64-xen.c | 39 --
+ arch/x86/kernel/ioport_32-xen.c | 2
+ arch/x86/kernel/ioport_64-xen.c | 2
+ arch/x86/kernel/irq_32-xen.c | 3
+ arch/x86/kernel/irq_64-xen.c | 34 +-
+ arch/x86/kernel/ldt_32-xen.c | 1
+ arch/x86/kernel/ldt_64-xen.c | 1
+ arch/x86/kernel/microcode-xen.c | 2
+ arch/x86/kernel/mpparse_32-xen.c | 3
+ arch/x86/kernel/mpparse_64-xen.c | 3
+ arch/x86/kernel/pci-dma-xen.c | 29 +
+ arch/x86/kernel/process_32-xen.c | 27 +
+ arch/x86/kernel/process_64-xen.c | 16
+ arch/x86/kernel/quirks-xen.c | 63 ---
+ arch/x86/kernel/setup64-xen.c | 17 -
+ arch/x86/kernel/setup_64-xen.c | 30 -
+ arch/x86/kernel/smp_32-xen.c | 191 ++++-------
+ arch/x86/kernel/smp_64-xen.c | 29 -
+ arch/x86/kernel/time_32-xen.c | 165 ++++++----
+ arch/x86/kernel/traps_32-xen.c | 46 +-
+ arch/x86/kernel/traps_64-xen.c | 55 +--
+ arch/x86/kernel/vsyscall_64-xen.c | 73 +++-
+ arch/x86/mm/fault_32-xen.c | 42 +-
+ arch/x86/mm/fault_64-xen.c | 15
+ arch/x86/mm/highmem_32-xen.c | 14
+ arch/x86/mm/init_32-xen.c | 157 ++++++---
+ arch/x86/mm/init_64-xen.c | 132 ++++----
+ arch/x86/mm/ioremap_32-xen.c | 1
+ arch/x86/mm/pageattr_64-xen.c | 27 +
+ arch/x86/mm/pgtable_32-xen.c | 206 +++++++-----
+ drivers/char/tpm/tpm_xen.c | 2
+ drivers/pci/msi-xen.c | 127 +++++--
+ drivers/xen/blkfront/blkfront.c | 2
+ drivers/xen/char/mem.c | 1
+ drivers/xen/core/hypervisor_sysfs.c | 2
+ drivers/xen/core/smpboot.c | 45 +-
+ drivers/xen/core/xen_sysfs.c | 24 -
+ drivers/xen/netback/netback.c | 14
+ drivers/xen/netfront/netfront.c | 2
+ drivers/xen/pciback/xenbus.c | 2
+ drivers/xen/pcifront/xenbus.c | 4
+ drivers/xen/scsifront/xenbus.c | 2
+ drivers/xen/sfc_netback/accel_fwd.c | 7
+ drivers/xen/sfc_netback/accel_solarflare.c | 2
+ drivers/xen/sfc_netfront/accel_tso.c | 28 -
+ drivers/xen/sfc_netfront/accel_vi.c | 4
+ drivers/xen/sfc_netfront/accel_xenbus.c | 4
+ fs/aio.c | 7
+ include/asm-x86/mach-xen/asm/desc_32.h | 119 ++++---
+ include/asm-x86/mach-xen/asm/desc_64.h | 30 -
+ include/asm-x86/mach-xen/asm/dma-mapping_64.h | 2
+ include/asm-x86/mach-xen/asm/fixmap_32.h | 9
+ include/asm-x86/mach-xen/asm/fixmap_64.h | 1
+ include/asm-x86/mach-xen/asm/highmem.h | 6
+ include/asm-x86/mach-xen/asm/io_32.h | 13
+ include/asm-x86/mach-xen/asm/irqflags_32.h | 75 ++--
+ include/asm-x86/mach-xen/asm/irqflags_64.h | 19 -
+ include/asm-x86/mach-xen/asm/mmu_context_32.h | 29 +
+ include/asm-x86/mach-xen/asm/mmu_context_64.h | 3
+ include/asm-x86/mach-xen/asm/page_64.h | 61 +--
+ include/asm-x86/mach-xen/asm/pgalloc_32.h | 3
+ include/asm-x86/mach-xen/asm/pgalloc_64.h | 15
+ include/asm-x86/mach-xen/asm/pgtable-3level-defs.h | 2
+ include/asm-x86/mach-xen/asm/pgtable-3level.h | 61 ++-
+ include/asm-x86/mach-xen/asm/pgtable_32.h | 80 ++--
+ include/asm-x86/mach-xen/asm/pgtable_64.h | 83 ++---
+ include/asm-x86/mach-xen/asm/processor_32.h | 141 +++-----
+ include/asm-x86/mach-xen/asm/processor_64.h | 55 ---
+ include/asm-x86/mach-xen/asm/segment_32.h | 10
+ include/asm-x86/mach-xen/asm/smp_32.h | 117 +++++--
+ include/asm-x86/mach-xen/asm/smp_64.h | 20 -
+ include/asm-x86/mach-xen/asm/system_32.h | 342 ++++-----------------
+ include/asm-x86/mach-xen/asm/system_64.h | 106 ------
+ include/asm-x86/mach-xen/asm/tlbflush_32.h | 11
+ include/asm-x86/mach-xen/asm/tlbflush_64.h | 2
+ include/linux/pci.h | 2
+ lib/swiotlb-xen.c | 1
+ net/core/dev.c | 15
+ scripts/Makefile.xen.awk | 2
+ 99 files changed, 1771 insertions(+), 2128 deletions(-)
+
+--- a/arch/x86/ia32/ia32entry-xen.S
++++ b/arch/x86/ia32/ia32entry-xen.S
+@@ -431,11 +431,7 @@ ia32_sys_call_table:
+ .quad sys_symlink
+ .quad sys_lstat
+ .quad sys_readlink /* 85 */
+-#ifdef CONFIG_IA32_AOUT
+ .quad sys_uselib
+-#else
+- .quad quiet_ni_syscall
+-#endif
+ .quad sys_swapon
+ .quad sys_reboot
+ .quad compat_sys_old_readdir
+@@ -574,7 +570,7 @@ ia32_sys_call_table:
+ .quad quiet_ni_syscall /* tux */
+ .quad quiet_ni_syscall /* security */
+ .quad sys_gettid
+- .quad sys_readahead /* 225 */
++ .quad sys32_readahead /* 225 */
+ .quad sys_setxattr
+ .quad sys_lsetxattr
+ .quad sys_fsetxattr
+@@ -599,7 +595,7 @@ ia32_sys_call_table:
+ .quad compat_sys_io_getevents
+ .quad compat_sys_io_submit
+ .quad sys_io_cancel
+- .quad sys_fadvise64 /* 250 */
++ .quad sys32_fadvise64 /* 250 */
+ .quad quiet_ni_syscall /* free_huge_pages */
+ .quad sys_exit_group
+ .quad sys32_lookup_dcookie
+@@ -663,10 +659,14 @@ ia32_sys_call_table:
+ .quad compat_sys_set_robust_list
+ .quad compat_sys_get_robust_list
+ .quad sys_splice
+- .quad sys_sync_file_range
+- .quad sys_tee
++ .quad sys32_sync_file_range
++ .quad sys_tee /* 315 */
+ .quad compat_sys_vmsplice
+ .quad compat_sys_move_pages
+ .quad sys_getcpu
+ .quad sys_epoll_pwait
+-ia32_syscall_end:
++ .quad compat_sys_utimensat /* 320 */
++ .quad compat_sys_signalfd
++ .quad compat_sys_timerfd
++ .quad sys_eventfd
++ia32_syscall_end:
+--- a/arch/x86/Kconfig
++++ b/arch/x86/Kconfig
+@@ -1429,7 +1429,7 @@ config PHYSICAL_START
+
+ config RELOCATABLE
+ bool "Build a relocatable kernel (EXPERIMENTAL)"
+- depends on EXPERIMENTAL && !X86_XEN
++ depends on EXPERIMENTAL && !X86_XEN && !X86_64_XEN
+ help
+ This builds a kernel image that retains relocation information
+ so it can be loaded someplace besides the default 1MB.
+@@ -1483,7 +1483,6 @@ config COMPAT_VDSO
+ def_bool y
+ prompt "Compat VDSO support"
+ depends on X86_32 || IA32_EMULATION
+- depends on !X86_XEN
+ help
+ Map the 32-bit VDSO to the predictable old-style address too.
+ ---help---
+@@ -1662,6 +1661,7 @@ config PCI
+ bool "PCI support"
+ default y
+ select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
++ select ARCH_SUPPORTS_MSI if (XEN_UNPRIVILEGED_GUEST && XEN_PCIDEV_FRONTEND)
+ help
+ Find out whether you have a PCI motherboard. PCI is the name of a
+ bus system, i.e. the way the CPU talks to the other stuff inside
+--- a/arch/x86/kernel/acpi/sleep_64-xen.c
++++ b/arch/x86/kernel/acpi/sleep_64-xen.c
+@@ -60,19 +60,6 @@ unsigned long acpi_video_flags;
+ extern char wakeup_start, wakeup_end;
+
+ extern unsigned long acpi_copy_wakeup_routine(unsigned long);
+-
+-static pgd_t low_ptr;
+-
+-static void init_low_mapping(void)
+-{
+- pgd_t *slot0 = pgd_offset(current->mm, 0UL);
+- low_ptr = *slot0;
+- /* FIXME: We're playing with the current task's page tables here, which
+- * is potentially dangerous on SMP systems.
+- */
+- set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET));
+- local_flush_tlb();
+-}
+ #endif
+
+ /**
+@@ -84,8 +71,6 @@ static void init_low_mapping(void)
+ int acpi_save_state_mem(void)
+ {
+ #ifndef CONFIG_ACPI_PV_SLEEP
+- init_low_mapping();
+-
+ memcpy((void *)acpi_wakeup_address, &wakeup_start,
+ &wakeup_end - &wakeup_start);
+ acpi_copy_wakeup_routine(acpi_wakeup_address);
+@@ -98,10 +83,6 @@ int acpi_save_state_mem(void)
+ */
+ void acpi_restore_state_mem(void)
+ {
+-#ifndef CONFIG_ACPI_PV_SLEEP
+- set_pgd(pgd_offset(current->mm, 0UL), low_ptr);
+- local_flush_tlb();
+-#endif
+ }
+
+ /**
+@@ -115,10 +96,11 @@ void acpi_restore_state_mem(void)
+ void __init acpi_reserve_bootmem(void)
+ {
+ #ifndef CONFIG_ACPI_PV_SLEEP
+- acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE);
+- if ((&wakeup_end - &wakeup_start) > PAGE_SIZE)
++ acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE*2);
++ if ((&wakeup_end - &wakeup_start) > (PAGE_SIZE*2))
+ printk(KERN_CRIT
+- "ACPI: Wakeup code way too big, will crash on attempt to suspend\n");
++ "ACPI: Wakeup code way too big, will crash on attempt"
++ " to suspend\n");
+ #endif
+ }
+
+--- a/arch/x86/kernel/apic_32-xen.c
++++ b/arch/x86/kernel/apic_32-xen.c
+@@ -19,7 +19,6 @@
+ #include <linux/mm.h>
+ #include <linux/delay.h>
+ #include <linux/bootmem.h>
+-#include <linux/smp_lock.h>
+ #include <linux/interrupt.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/kernel_stat.h>
+--- a/arch/x86/kernel/apic_64-xen.c
++++ b/arch/x86/kernel/apic_64-xen.c
+@@ -19,7 +19,6 @@
+ #include <linux/mm.h>
+ #include <linux/delay.h>
+ #include <linux/bootmem.h>
+-#include <linux/smp_lock.h>
+ #include <linux/interrupt.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/kernel_stat.h>
+--- a/arch/x86/kernel/asm-offsets_32.c
++++ b/arch/x86/kernel/asm-offsets_32.c
+@@ -109,11 +109,6 @@ void foo(void)
+
+ OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
+
+-#ifdef CONFIG_XEN
+- BLANK();
+- OFFSET(XEN_START_mfn_list, start_info, mfn_list);
+-#endif
+-
+ #ifdef CONFIG_PARAVIRT
+ BLANK();
+ OFFSET(PARAVIRT_enabled, pv_info, paravirt_enabled);
+--- a/arch/x86/kernel/cpu/common-xen.c
++++ b/arch/x86/kernel/cpu/common-xen.c
+@@ -22,16 +22,40 @@
+ #define phys_pkg_id(a,b) a
+ #endif
+ #endif
+-#include <asm/pda.h>
+ #include <asm/hypervisor.h>
+
+ #include "cpu.h"
+
+-DEFINE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
+-EXPORT_PER_CPU_SYMBOL(cpu_gdt_descr);
++DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
++ [GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
++ [GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
++ [GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
++ [GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
++#ifndef CONFIG_XEN
++ /*
++ * Segments used for calling PnP BIOS have byte granularity.
++ * They code segments and data segments have fixed 64k limits,
++ * the transfer segment sizes are set at run time.
++ */
++ [GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
++ [GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
++ [GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
++ [GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
++ [GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
++ /*
++ * The APM segments have byte granularity and their bases
++ * are set at run time. All have 64k limits.
++ */
++ [GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
++ /* 16-bit code */
++ [GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
++ [GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
+
+-struct i386_pda *_cpu_pda[NR_CPUS] __read_mostly;
+-EXPORT_SYMBOL(_cpu_pda);
++ [GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
++#endif
++ [GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
++} };
++EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
+
+ static int cachesize_override __cpuinitdata = -1;
+ static int disable_x86_fxsr __cpuinitdata;
+@@ -373,7 +397,7 @@ __setup("serialnumber", x86_serial_nr_se
+ /*
+ * This does the hard work of actually picking apart the CPU stuff...
+ */
+-void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
++static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+ {
+ int i;
+
+@@ -484,15 +508,22 @@ void __cpuinit identify_cpu(struct cpuin
+
+ /* Init Machine Check Exception if available. */
+ mcheck_init(c);
++}
+
+- if (c == &boot_cpu_data)
+- sysenter_setup();
++void __init identify_boot_cpu(void)
++{
++ identify_cpu(&boot_cpu_data);
++ sysenter_setup();
+ enable_sep_cpu();
++ mtrr_bp_init();
++}
+
+- if (c == &boot_cpu_data)
+- mtrr_bp_init();
+- else
+- mtrr_ap_init();
++void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
++{
++ BUG_ON(c == &boot_cpu_data);
++ identify_cpu(c);
++ enable_sep_cpu();
++ mtrr_ap_init();
+ }
+
+ #ifdef CONFIG_X86_HT
+@@ -606,136 +637,47 @@ void __init early_cpu_init(void)
+ #endif
+ }
+
+-/* Make sure %gs is initialized properly in idle threads */
++/* Make sure %fs is initialized properly in idle threads */
+ struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
+ {
+ memset(regs, 0, sizeof(struct pt_regs));
+- regs->xfs = __KERNEL_PDA;
++ regs->xfs = __KERNEL_PERCPU;
+ return regs;
+ }
+
+-static __cpuinit int alloc_gdt(int cpu)
++/* Current gdt points %fs at the "master" per-cpu area: after this,
++ * it's on the real one. */
++void switch_to_new_gdt(void)
+ {
+- struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
+- struct desc_struct *gdt;
+- struct i386_pda *pda;
+-
+- gdt = (struct desc_struct *)cpu_gdt_descr->address;
+- pda = cpu_pda(cpu);
+-
+- /*
+- * This is a horrible hack to allocate the GDT. The problem
+- * is that cpu_init() is called really early for the boot CPU
+- * (and hence needs bootmem) but much later for the secondary
+- * CPUs, when bootmem will have gone away
+- */
+- if (NODE_DATA(0)->bdata->node_bootmem_map) {
+- BUG_ON(gdt != NULL || pda != NULL);
+-
+- gdt = alloc_bootmem_pages(PAGE_SIZE);
+- pda = alloc_bootmem(sizeof(*pda));
+- /* alloc_bootmem(_pages) panics on failure, so no check */
+-
+- memset(gdt, 0, PAGE_SIZE);
+- memset(pda, 0, sizeof(*pda));
+- } else {
+- /* GDT and PDA might already have been allocated if
+- this is a CPU hotplug re-insertion. */
+- if (gdt == NULL)
+- gdt = (struct desc_struct *)get_zeroed_page(GFP_KERNEL);
+-
+- if (pda == NULL)
+- pda = kmalloc_node(sizeof(*pda), GFP_KERNEL, cpu_to_node(cpu));
+-
+- if (unlikely(!gdt || !pda)) {
+- free_pages((unsigned long)gdt, 0);
+- kfree(pda);
+- return 0;
+- }
+- }
+-
+- cpu_gdt_descr->address = (unsigned long)gdt;
+- cpu_pda(cpu) = pda;
+-
+- return 1;
+-}
+-
+-/* Initial PDA used by boot CPU */
+-struct i386_pda boot_pda = {
+- ._pda = &boot_pda,
+- .cpu_number = 0,
+- .pcurrent = &init_task,
+-};
+-
+-static inline void set_kernel_fs(void)
+-{
+- /* Set %fs for this CPU's PDA. Memory clobber is to create a
+- barrier with respect to any PDA operations, so the compiler
+- doesn't move any before here. */
+- asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_PDA) : "memory");
+-}
+-
+-/* Initialize the CPU's GDT and PDA. The boot CPU does this for
+- itself, but secondaries find this done for them. */
+-__cpuinit int init_gdt(int cpu, struct task_struct *idle)
+-{
+- struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
+- struct desc_struct *gdt;
+- struct i386_pda *pda;
+-
+- /* For non-boot CPUs, the GDT and PDA should already have been
+- allocated. */
+- if (!alloc_gdt(cpu)) {
+- printk(KERN_CRIT "CPU%d failed to allocate GDT or PDA\n", cpu);
+- return 0;
+- }
+-
+- gdt = (struct desc_struct *)cpu_gdt_descr->address;
+- pda = cpu_pda(cpu);
+-
+- BUG_ON(gdt == NULL || pda == NULL);
+-
+- /*
+- * Initialize the per-CPU GDT with the boot GDT,
+- * and set up the GDT descriptor:
+- */
+- memcpy(gdt, cpu_gdt_table, GDT_SIZE);
+- cpu_gdt_descr->size = GDT_SIZE - 1;
+-
+- pack_descriptor((u32 *)&gdt[GDT_ENTRY_PDA].a,
+- (u32 *)&gdt[GDT_ENTRY_PDA].b,
+- (unsigned long)pda, sizeof(*pda) - 1,
+- 0x80 | DESCTYPE_S | 0x2, 0); /* present read-write data segment */
+-
+- memset(pda, 0, sizeof(*pda));
+- pda->_pda = pda;
+- pda->cpu_number = cpu;
+- pda->pcurrent = idle;
+-
+- return 1;
+-}
+-
+-void __cpuinit cpu_set_gdt(int cpu)
+-{
+- struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++ struct Xgt_desc_struct gdt_descr;
+ unsigned long va, frames[16];
+ int f;
+
+- for (va = cpu_gdt_descr->address, f = 0;
+- va < cpu_gdt_descr->address + cpu_gdt_descr->size;
++ gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
++ gdt_descr.size = GDT_SIZE - 1;
++
++ for (va = gdt_descr.address, f = 0;
++ va < gdt_descr.address + gdt_descr.size;
+ va += PAGE_SIZE, f++) {
+ frames[f] = virt_to_mfn(va);
+ make_lowmem_page_readonly(
+ (void *)va, XENFEAT_writable_descriptor_tables);
+ }
+- BUG_ON(HYPERVISOR_set_gdt(frames, (cpu_gdt_descr->size + 1) / 8));
+-
+- set_kernel_fs();
++ if (HYPERVISOR_set_gdt(frames, (gdt_descr.size + 1) / 8))
++ BUG();
++ asm("mov %0, %%fs" : : "r" (__KERNEL_PERCPU) : "memory");
+ }
+
+-/* Common CPU init for both boot and secondary CPUs */
+-static void __cpuinit _cpu_init(int cpu, struct task_struct *curr)
++/*
++ * cpu_init() initializes state that is per-CPU. Some data is already
++ * initialized (naturally) in the bootstrap process, such as the GDT
++ * and IDT. We reload them nevertheless, this function acts as a
++ * 'CPU state barrier', nothing should get across.
++ */
++void __cpuinit cpu_init(void)
+ {
++ int cpu = smp_processor_id();
++ struct task_struct *curr = current;
+ #ifndef CONFIG_X86_NO_TSS
+ struct tss_struct * t = &per_cpu(init_tss, cpu);
+ #endif
+@@ -757,6 +699,8 @@ static void __cpuinit _cpu_init(int cpu,
+ set_in_cr4(X86_CR4_TSD);
+ }
+
++ switch_to_new_gdt();
++
+ /*
+ * Set up and load the per-CPU TSS and LDT
+ */
+@@ -794,38 +738,6 @@ static void __cpuinit _cpu_init(int cpu,
+ mxcsr_feature_mask_init();
+ }
+
+-/* Entrypoint to initialize secondary CPU */
+-void __cpuinit secondary_cpu_init(void)
+-{
+- int cpu = smp_processor_id();
+- struct task_struct *curr = current;
+-
+- _cpu_init(cpu, curr);
+-}
+-
+-/*
+- * cpu_init() initializes state that is per-CPU. Some data is already
+- * initialized (naturally) in the bootstrap process, such as the GDT
+- * and IDT. We reload them nevertheless, this function acts as a
+- * 'CPU state barrier', nothing should get across.
+- */
+-void __cpuinit cpu_init(void)
+-{
+- int cpu = smp_processor_id();
+- struct task_struct *curr = current;
+-
+- /* Set up the real GDT and PDA, so we can transition from the
+- boot versions. */
+- if (!init_gdt(cpu, curr)) {
+- /* failed to allocate something; not much we can do... */
+- for (;;)
+- local_irq_enable();
+- }
+-
+- cpu_set_gdt(cpu);
+- _cpu_init(cpu, curr);
+-}
+-
+ #ifdef CONFIG_HOTPLUG_CPU
+ void __cpuinit cpu_uninit(void)
+ {
+--- a/arch/x86/kernel/cpu/mtrr/main-xen.c
++++ b/arch/x86/kernel/cpu/mtrr/main-xen.c
+@@ -167,7 +167,7 @@ mtrr_del(int reg, unsigned long base, un
+ EXPORT_SYMBOL(mtrr_add);
+ EXPORT_SYMBOL(mtrr_del);
+
+-void __init mtrr_bp_init(void)
++__init void mtrr_bp_init(void)
+ {
+ }
+
+--- a/arch/x86/kernel/e820_32-xen.c
++++ b/arch/x86/kernel/e820_32-xen.c
+@@ -162,26 +162,27 @@ static struct resource standard_io_resou
+
+ static int __init romsignature(const unsigned char *rom)
+ {
++ const unsigned short * const ptr = (const unsigned short *)rom;
+ unsigned short sig;
+
+- return probe_kernel_address((const unsigned short *)rom, sig) == 0 &&
+- sig == ROMSIGNATURE;
++ return probe_kernel_address(ptr, sig) == 0 && sig == ROMSIGNATURE;
+ }
+
+-static int __init romchecksum(unsigned char *rom, unsigned long length)
++static int __init romchecksum(const unsigned char *rom, unsigned long length)
+ {
+- unsigned char sum;
++ unsigned char sum, c;
+
+- for (sum = 0; length; length--)
+- sum += *rom++;
+- return sum == 0;
++ for (sum = 0; length && probe_kernel_address(rom++, c) == 0; length--)
++ sum += c;
++ return !length && !sum;
+ }
+
+ static void __init probe_roms(void)
+ {
++ const unsigned char *rom;
+ unsigned long start, length, upper;
+- unsigned char *rom;
+- int i;
++ unsigned char c;
++ int i;
+
+ #ifdef CONFIG_XEN
+ /* Nothing to do if not running in dom0. */
+@@ -198,8 +199,11 @@ static void __init probe_roms(void)
+
+ video_rom_resource.start = start;
+
++ if (probe_kernel_address(rom + 2, c) != 0)
++ continue;
++
+ /* 0 < length <= 0x7f * 512, historically */
+- length = rom[2] * 512;
++ length = c * 512;
+
+ /* if checksum okay, trust length byte */
+ if (length && romchecksum(rom, length))
+@@ -233,8 +237,11 @@ static void __init probe_roms(void)
+ if (!romsignature(rom))
+ continue;
+
++ if (probe_kernel_address(rom + 2, c) != 0)
++ continue;
++
+ /* 0 < length <= 0x7f * 512, historically */
+- length = rom[2] * 512;
++ length = c * 512;
+
+ /* but accept any length that fits if checksum okay */
+ if (!length || start + length > upper || !romchecksum(rom, length))
+@@ -249,7 +256,7 @@ static void __init probe_roms(void)
+ }
+
+ #ifdef CONFIG_XEN
+-static struct e820map machine_e820 __initdata;
++static struct e820map machine_e820;
+ #define e820 machine_e820
+ #endif
+
+@@ -409,10 +416,8 @@ int __init sanitize_e820_map(struct e820
+ ____________________33__
+ ______________________4_
+ */
+- printk("sanitize start\n");
+ /* if there's only one memory region, don't bother */
+ if (*pnr_map < 2) {
+- printk("sanitize bail 0\n");
+ return -1;
+ }
+
+@@ -421,7 +426,6 @@ int __init sanitize_e820_map(struct e820
+ /* bail out if we find any unreasonable addresses in bios map */
+ for (i=0; i<old_nr; i++)
+ if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr) {
+- printk("sanitize bail 1\n");
+ return -1;
+ }
+
+@@ -517,7 +521,6 @@ int __init sanitize_e820_map(struct e820
+ memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
+ *pnr_map = new_nr;
+
+- printk("sanitize end\n");
+ return 0;
+ }
+
+@@ -552,7 +555,6 @@ int __init copy_e820_map(struct e820entr
+ unsigned long long size = biosmap->size;
+ unsigned long long end = start + size;
+ unsigned long type = biosmap->type;
+- printk("copy_e820_map() start: %016Lx size: %016Lx end: %016Lx type: %ld\n", start, size, end, type);
+
+ /* Overflow in 64 bits? Ignore the memory map. */
+ if (start > end)
+@@ -564,17 +566,11 @@ int __init copy_e820_map(struct e820entr
+ * Not right. Fix it up.
+ */
+ if (type == E820_RAM) {
+- printk("copy_e820_map() type is E820_RAM\n");
+ if (start < 0x100000ULL && end > 0xA0000ULL) {
+- printk("copy_e820_map() lies in range...\n");
+- if (start < 0xA0000ULL) {
+- printk("copy_e820_map() start < 0xA0000ULL\n");
++ if (start < 0xA0000ULL)
+ add_memory_region(start, 0xA0000ULL-start, type);
+- }
+- if (end <= 0x100000ULL) {
+- printk("copy_e820_map() end <= 0x100000ULL\n");
++ if (end <= 0x100000ULL)
+ continue;
+- }
+ start = 0x100000ULL;
+ size = end - start;
+ }
+--- a/arch/x86/kernel/e820_64-xen.c
++++ b/arch/x86/kernel/e820_64-xen.c
+@@ -17,6 +17,8 @@
+ #include <linux/kexec.h>
+ #include <linux/module.h>
+ #include <linux/mm.h>
++#include <linux/suspend.h>
++#include <linux/pfn.h>
+
+ #include <asm/pgtable.h>
+ #include <asm/page.h>
+@@ -28,7 +30,7 @@
+
+ struct e820map e820 __initdata;
+ #ifdef CONFIG_XEN
+-struct e820map machine_e820 __initdata;
++struct e820map machine_e820;
+ #endif
+
+ /*
+@@ -291,22 +293,6 @@ void __init e820_reserve_resources(struc
+ }
+
+ #ifndef CONFIG_XEN
+-/* Mark pages corresponding to given address range as nosave */
+-static void __init
+-e820_mark_nosave_range(unsigned long start, unsigned long end)
+-{
+- unsigned long pfn, max_pfn;
+-
+- if (start >= end)
+- return;
+-
+- printk("Nosave address range: %016lx - %016lx\n", start, end);
+- max_pfn = end >> PAGE_SHIFT;
+- for (pfn = start >> PAGE_SHIFT; pfn < max_pfn; pfn++)
+- if (pfn_valid(pfn))
+- SetPageNosave(pfn_to_page(pfn));
+-}
+-
+ /*
+ * Find the ranges of physical addresses that do not correspond to
+ * e820 RAM areas and mark the corresponding pages as nosave for software
+@@ -325,13 +311,13 @@ void __init e820_mark_nosave_regions(voi
+ struct e820entry *ei = &e820.map[i];
+
+ if (paddr < ei->addr)
+- e820_mark_nosave_range(paddr,
+- round_up(ei->addr, PAGE_SIZE));
++ register_nosave_region(PFN_DOWN(paddr),
++ PFN_UP(ei->addr));
+
+ paddr = round_down(ei->addr + ei->size, PAGE_SIZE);
+ if (ei->type != E820_RAM)
+- e820_mark_nosave_range(round_up(ei->addr, PAGE_SIZE),
+- paddr);
++ register_nosave_region(PFN_UP(ei->addr),
++ PFN_DOWN(paddr));
+
+ if (paddr >= (end_pfn << PAGE_SHIFT))
+ break;
+--- a/arch/x86/kernel/early_printk-xen.c
++++ b/arch/x86/kernel/early_printk-xen.c
+@@ -11,11 +11,10 @@
+
+ #ifdef __i386__
+ #include <asm/setup.h>
+-#define VGABASE (__ISA_IO_base + 0xb8000)
+ #else
+ #include <asm/bootsetup.h>
+-#define VGABASE ((void __iomem *)0xffffffff800b8000UL)
+ #endif
++#define VGABASE (__ISA_IO_base + 0xb8000)
+
+ #ifndef CONFIG_XEN
+ static int max_ypos = 25, max_xpos = 80;
+@@ -93,9 +92,9 @@ static int early_serial_putc(unsigned ch
+ static void early_serial_write(struct console *con, const char *s, unsigned n)
+ {
+ while (*s && n-- > 0) {
+- early_serial_putc(*s);
+ if (*s == '\n')
+ early_serial_putc('\r');
++ early_serial_putc(*s);
+ s++;
+ }
+ }
+@@ -205,7 +204,7 @@ static noinline long simnow(long cmd, lo
+ return ret;
+ }
+
+-void __init simnow_init(char *str)
++static void __init simnow_init(char *str)
+ {
+ char *fn = "klog";
+ if (*str == '=')
+@@ -277,22 +276,12 @@ static int __init setup_early_printk(cha
+ early_console = &simnow_console;
+ keep_early = 1;
+ }
++
++ if (keep_early)
++ early_console->flags &= ~CON_BOOT;
++ else
++ early_console->flags |= CON_BOOT;
+ register_console(early_console);
+ return 0;
+ }
+-
+ early_param("earlyprintk", setup_early_printk);
+-
+-void __init disable_early_printk(void)
+-{
+- if (!early_console_initialized || !early_console)
+- return;
+- if (!keep_early) {
+- printk("disabling early console\n");
+- unregister_console(early_console);
+- early_console_initialized = 0;
+- } else {
+- printk("keeping early console\n");
+- }
+-}
+-
+--- a/arch/x86/kernel/entry_32-xen.S
++++ b/arch/x86/kernel/entry_32-xen.S
+@@ -15,7 +15,7 @@
+ * I changed all the .align's to 4 (16 byte alignment), as that's faster
+ * on a 486.
+ *
+- * Stack layout in 'ret_from_system_call':
++ * Stack layout in 'syscall_exit':
+ * ptrace needs to have all regs on the stack.
+ * if the order here is changed, it needs to be
+ * updated in fork.c:copy_process, signal.c:do_signal,
+@@ -135,7 +135,7 @@ NMI_MASK = 0x80000000
+ movl $(__USER_DS), %edx; \
+ movl %edx, %ds; \
+ movl %edx, %es; \
+- movl $(__KERNEL_PDA), %edx; \
++ movl $(__KERNEL_PERCPU), %edx; \
+ movl %edx, %fs
+
+ #define RESTORE_INT_REGS \
+@@ -308,16 +308,12 @@ sysenter_past_esp:
+ pushl $(__USER_CS)
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET cs, 0*/
+-#ifndef CONFIG_COMPAT_VDSO
+ /*
+ * Push current_thread_info()->sysenter_return to the stack.
+ * A tiny bit of offset fixup is necessary - 4*4 means the 4 words
+ * pushed above; +8 corresponds to copy_thread's esp0 setting.
+ */
+ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp)
+-#else
+- pushl $SYSENTER_RETURN
+-#endif
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET eip, 0
+
+@@ -345,7 +341,7 @@ sysenter_past_esp:
+ jae syscall_badsys
+ call *sys_call_table(,%eax,4)
+ movl %eax,PT_EAX(%esp)
+- DISABLE_INTERRUPTS(CLBR_ECX|CLBR_EDX)
++ DISABLE_INTERRUPTS(CLBR_ANY)
+ TRACE_IRQS_OFF
+ movl TI_flags(%ebp), %ecx
+ testw $_TIF_ALLWORK_MASK, %cx
+@@ -400,10 +396,6 @@ ENTRY(system_call)
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+- testl $TF_MASK,PT_EFLAGS(%esp)
+- jz no_singlestep
+- orl $_TIF_SINGLESTEP,TI_flags(%ebp)
+-no_singlestep:
+ # system call tracing in operation / emulation
+ /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
+ testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
+@@ -418,6 +410,10 @@ syscall_exit:
+ # setting need_resched or sigpending
+ # between sampling and the iret
+ TRACE_IRQS_OFF
++ testl $TF_MASK,PT_EFLAGS(%esp) # If tracing set singlestep flag on exit
++ jz no_singlestep
++ orl $_TIF_SINGLESTEP,TI_flags(%ebp)
++no_singlestep:
+ movl TI_flags(%ebp), %ecx
+ testw $_TIF_ALLWORK_MASK, %cx # current->work
+ jne syscall_exit_work
+@@ -635,9 +631,7 @@ END(syscall_badsys)
+ #ifndef CONFIG_XEN
+ #define FIXUP_ESPFIX_STACK \
+ /* since we are on a wrong stack, we cant make it a C code :( */ \
+- movl %fs:PDA_cpu, %ebx; \
+- PER_CPU(cpu_gdt_descr, %ebx); \
+- movl GDS_address(%ebx), %ebx; \
++ PER_CPU(gdt_page, %ebx); \
+ GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah); \
+ addl %esp, %eax; \
+ pushl $__KERNEL_DS; \
+@@ -710,7 +704,7 @@ ENTRY(name) \
+ SAVE_ALL; \
+ TRACE_IRQS_OFF \
+ movl %esp,%eax; \
+- call smp_/**/name; \
++ call smp_##name; \
+ jmp ret_from_intr; \
+ CFI_ENDPROC; \
+ ENDPROC(name)
+@@ -718,10 +712,6 @@ ENDPROC(name)
+ /* The include is where all of the SMP etc. interrupts come from */
+ #include "entry_arch.h"
+
+-/* This alternate entry is needed because we hijack the apic LVTT */
+-#if defined(CONFIG_VMI) && defined(CONFIG_X86_LOCAL_APIC)
+-BUILD_INTERRUPT(apic_vmi_timer_interrupt,LOCAL_TIMER_VECTOR)
+-#endif
+ #else
+ #define UNWIND_ESPFIX_STACK
+ #endif
+@@ -764,7 +754,7 @@ error_code:
+ pushl %fs
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET fs, 0*/
+- movl $(__KERNEL_PDA), %ecx
++ movl $(__KERNEL_PERCPU), %ecx
+ movl %ecx, %fs
+ UNWIND_ESPFIX_STACK
+ popl %ecx
+--- a/arch/x86/kernel/entry_64-xen.S
++++ b/arch/x86/kernel/entry_64-xen.S
+@@ -1254,3 +1254,10 @@ ENTRY(call_softirq)
+ ret
+ CFI_ENDPROC
+ ENDPROC(call_softirq)
++
++KPROBE_ENTRY(ignore_sysret)
++ CFI_STARTPROC
++ mov $-ENOSYS,%eax
++ HYPERVISOR_IRET 0
++ CFI_ENDPROC
++ENDPROC(ignore_sysret)
+--- a/arch/x86/kernel/genapic_64-xen.c
++++ b/arch/x86/kernel/genapic_64-xen.c
+@@ -11,123 +11,57 @@
+ #include <linux/threads.h>
+ #include <linux/cpumask.h>
+ #include <linux/string.h>
++#include <linux/module.h>
+ #include <linux/kernel.h>
+ #include <linux/ctype.h>
+ #include <linux/init.h>
+-#include <linux/module.h>
+
+ #include <asm/smp.h>
+ #include <asm/ipi.h>
++#include <asm/genapic.h>
+
+-#if defined(CONFIG_ACPI)
++#ifdef CONFIG_ACPI
+ #include <acpi/acpi_bus.h>
+ #endif
+
+ /* which logical CPU number maps to which CPU (physical APIC ID) */
+-u8 x86_cpu_to_apicid[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
++u8 x86_cpu_to_apicid[NR_CPUS] __read_mostly
++ = { [0 ... NR_CPUS-1] = BAD_APICID };
+ EXPORT_SYMBOL(x86_cpu_to_apicid);
+-u8 x86_cpu_to_log_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
+
+-extern struct genapic apic_cluster;
+-extern struct genapic apic_flat;
+-extern struct genapic apic_physflat;
++u8 x86_cpu_to_log_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
+
+ #ifndef CONFIG_XEN
+-struct genapic *genapic = &apic_flat;
+-struct genapic *genapic_force;
++struct genapic __read_mostly *genapic = &apic_flat;
+ #else
+ extern struct genapic apic_xen;
+-struct genapic *genapic = &apic_xen;
++struct genapic __read_mostly *genapic = &apic_xen;
+ #endif
+
+
+ /*
+ * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
+ */
+-void __init clustered_apic_check(void)
++void __init setup_apic_routing(void)
+ {
+ #ifndef CONFIG_XEN
+- long i;
+- u8 clusters, max_cluster;
+- u8 id;
+- u8 cluster_cnt[NUM_APIC_CLUSTERS];
+- int max_apic = 0;
+-
+- /* genapic selection can be forced because of certain quirks.
+- */
+- if (genapic_force) {
+- genapic = genapic_force;
+- goto print;
+- }
+-
+-#if defined(CONFIG_ACPI)
++#ifdef CONFIG_ACPI
+ /*
+- * Some x86_64 machines use physical APIC mode regardless of how many
+- * procs/clusters are present (x86_64 ES7000 is an example).
++ * Quirk: some x86_64 machines can only use physical APIC mode
++ * regardless of how many processors are present (x86_64 ES7000
++ * is an example).
+ */
+- if (acpi_gbl_FADT.header.revision > FADT2_REVISION_ID)
+- if (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL) {
+- genapic = &apic_cluster;
+- goto print;
+- }
+-#endif
+-
+- memset(cluster_cnt, 0, sizeof(cluster_cnt));
+- for (i = 0; i < NR_CPUS; i++) {
+- id = bios_cpu_apicid[i];
+- if (id == BAD_APICID)
+- continue;
+- if (id > max_apic)
+- max_apic = id;
+- cluster_cnt[APIC_CLUSTERID(id)]++;
+- }
+-
+- /* Don't use clustered mode on AMD platforms. */
+- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
++ if (acpi_gbl_FADT.header.revision > FADT2_REVISION_ID &&
++ (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL))
+ genapic = &apic_physflat;
+-#ifndef CONFIG_HOTPLUG_CPU
+- /* In the CPU hotplug case we cannot use broadcast mode
+- because that opens a race when a CPU is removed.
+- Stay at physflat mode in this case.
+- It is bad to do this unconditionally though. Once
+- we have ACPI platform support for CPU hotplug
+- we should detect hotplug capablity from ACPI tables and
+- only do this when really needed. -AK */
+- if (max_apic <= 8)
+- genapic = &apic_flat;
+-#endif
+- goto print;
+- }
+-
+- clusters = 0;
+- max_cluster = 0;
+-
+- for (i = 0; i < NUM_APIC_CLUSTERS; i++) {
+- if (cluster_cnt[i] > 0) {
+- ++clusters;
+- if (cluster_cnt[i] > max_cluster)
+- max_cluster = cluster_cnt[i];
+- }
+- }
++ else
++#endif
+
+- /*
+- * If we have clusters <= 1 and CPUs <= 8 in cluster 0, then flat mode,
+- * else if max_cluster <= 4 and cluster_cnt[15] == 0, clustered logical
+- * else physical mode.
+- * (We don't use lowest priority delivery + HW APIC IRQ steering, so
+- * can ignore the clustered logical case and go straight to physical.)
+- */
+- if (clusters <= 1 && max_cluster <= 8 && cluster_cnt[0] == max_cluster) {
+-#ifdef CONFIG_HOTPLUG_CPU
+- /* Don't use APIC shortcuts in CPU hotplug to avoid races */
+- genapic = &apic_physflat;
+-#else
++ if (cpus_weight(cpu_possible_map) <= 8)
+ genapic = &apic_flat;
+-#endif
+- } else
+- genapic = &apic_cluster;
++ else
++ genapic = &apic_physflat;
+
+-print:
+ #else
+ /* hardcode to xen apic functions */
+ genapic = &apic_xen;
+@@ -135,7 +69,7 @@ print:
+ printk(KERN_INFO "Setting APIC routing to %s\n", genapic->name);
+ }
+
+-/* Same for both flat and clustered. */
++/* Same for both flat and physical. */
+
+ #ifdef CONFIG_XEN
+ extern void xen_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest);
+--- a/arch/x86/kernel/genapic_xen_64.c
++++ b/arch/x86/kernel/genapic_xen_64.c
+@@ -21,9 +21,8 @@
+ #include <asm/ipi.h>
+ #else
+ #include <asm/apic.h>
+-#include <asm/apicdef.h>
+-#include <asm/genapic.h>
+ #endif
++#include <asm/genapic.h>
+ #include <xen/evtchn.h>
+
+ DECLARE_PER_CPU(int, ipi_to_irq[NR_IPIS]);
+--- a/arch/x86/kernel/head_32-xen.S
++++ b/arch/x86/kernel/head_32-xen.S
+@@ -37,7 +37,8 @@ ENTRY(startup_32)
+ /* Set up the stack pointer */
+ movl $(init_thread_union+THREAD_SIZE),%esp
+
+- call setup_pda
++ movl %ss,%eax
++ movl %eax,%fs # gets reset once there's real percpu
+
+ /* get vendor info */
+ xorl %eax,%eax # call CPUID with 0 -> return vendor ID
+@@ -64,55 +65,11 @@ ENTRY(startup_32)
+ xorl %eax,%eax # Clear GS
+ movl %eax,%gs
+
+- movl $(__KERNEL_PDA),%eax
+- mov %eax,%fs
+-
+ cld # gcc2 wants the direction flag cleared at all times
+
+ pushl $0 # fake return address for unwinder
+ jmp start_kernel
+
+-/*
+- * Point the GDT at this CPU's PDA. This will be
+- * cpu_gdt_table and boot_pda.
+- */
+-ENTRY(setup_pda)
+- /* get the PDA pointer */
+- movl $boot_pda, %eax
+-
+- /* slot the PDA address into the GDT */
+- mov $cpu_gdt_table, %ecx
+- mov %ax, (__KERNEL_PDA+0+2)(%ecx) /* base & 0x0000ffff */
+- shr $16, %eax
+- mov %al, (__KERNEL_PDA+4+0)(%ecx) /* base & 0x00ff0000 */
+- mov %ah, (__KERNEL_PDA+4+3)(%ecx) /* base & 0xff000000 */
+-
+- # %esi still points to start_info, and no registers
+- # need to be preserved.
+-
+- movl XEN_START_mfn_list(%esi), %ebx
+- movl $(cpu_gdt_table - __PAGE_OFFSET), %eax
+- shrl $PAGE_SHIFT, %eax
+- movl (%ebx,%eax,4), %ecx
+- pushl %ecx # frame number for set_gdt below
+-
+- xorl %esi, %esi
+- xorl %edx, %edx
+- shldl $PAGE_SHIFT, %ecx, %edx
+- shll $PAGE_SHIFT, %ecx
+- orl $0x61, %ecx
+- movl $cpu_gdt_table, %ebx
+- movl $__HYPERVISOR_update_va_mapping, %eax
+- int $0x82
+-
+- movl $(PAGE_SIZE_asm / 8), %ecx
+- movl %esp, %ebx
+- movl $__HYPERVISOR_set_gdt, %eax
+- int $0x82
+-
+- popl %ecx
+- ret
+-
+ #define HYPERCALL_PAGE_OFFSET 0x1000
+ .org HYPERCALL_PAGE_OFFSET
+ ENTRY(hypercall_page)
+@@ -138,60 +95,6 @@ ENTRY(empty_zero_page)
+ */
+ .data
+
+-/*
+- * The Global Descriptor Table contains 28 quadwords, per-CPU.
+- */
+- .section .data.page_aligned, "aw"
+- .align PAGE_SIZE_asm
+-ENTRY(cpu_gdt_table)
+- .quad 0x0000000000000000 /* NULL descriptor */
+- .quad 0x0000000000000000 /* 0x0b reserved */
+- .quad 0x0000000000000000 /* 0x13 reserved */
+- .quad 0x0000000000000000 /* 0x1b reserved */
+- .quad 0x0000000000000000 /* 0x20 unused */
+- .quad 0x0000000000000000 /* 0x28 unused */
+- .quad 0x0000000000000000 /* 0x33 TLS entry 1 */
+- .quad 0x0000000000000000 /* 0x3b TLS entry 2 */
+- .quad 0x0000000000000000 /* 0x43 TLS entry 3 */
+- .quad 0x0000000000000000 /* 0x4b reserved */
+- .quad 0x0000000000000000 /* 0x53 reserved */
+- .quad 0x0000000000000000 /* 0x5b reserved */
+-
+- .quad 0x00cf9a000000ffff /* 0x60 kernel 4GB code at 0x00000000 */
+- .quad 0x00cf92000000ffff /* 0x68 kernel 4GB data at 0x00000000 */
+- .quad 0x00cffa000000ffff /* 0x73 user 4GB code at 0x00000000 */
+- .quad 0x00cff2000000ffff /* 0x7b user 4GB data at 0x00000000 */
+-
+- .quad 0x0000000000000000 /* 0x80 TSS descriptor */
+- .quad 0x0000000000000000 /* 0x88 LDT descriptor */
+-
+- /*
+- * Segments used for calling PnP BIOS have byte granularity.
+- * They code segments and data segments have fixed 64k limits,
+- * the transfer segment sizes are set at run time.
+- */
+- .quad 0x0000000000000000 /* 0x90 32-bit code */
+- .quad 0x0000000000000000 /* 0x98 16-bit code */
+- .quad 0x0000000000000000 /* 0xa0 16-bit data */
+- .quad 0x0000000000000000 /* 0xa8 16-bit data */
+- .quad 0x0000000000000000 /* 0xb0 16-bit data */
+-
+- /*
+- * The APM segments have byte granularity and their bases
+- * are set at run time. All have 64k limits.
+- */
+- .quad 0x0000000000000000 /* 0xb8 APM CS code */
+- .quad 0x0000000000000000 /* 0xc0 APM CS 16 code (16 bit) */
+- .quad 0x0000000000000000 /* 0xc8 APM DS data */
+-
+- .quad 0x0000000000000000 /* 0xd0 - ESPFIX SS */
+- .quad 0x00cf92000000ffff /* 0xd8 - PDA */
+- .quad 0x0000000000000000 /* 0xe0 - unused */
+- .quad 0x0000000000000000 /* 0xe8 - unused */
+- .quad 0x0000000000000000 /* 0xf0 - unused */
+- .quad 0x0000000000000000 /* 0xf8 - GDT entry 31: double-fault TSS */
+- .align PAGE_SIZE_asm
+-
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ /*
+ * __xen_guest information
+--- a/arch/x86/kernel/head64-xen.c
++++ b/arch/x86/kernel/head64-xen.c
+@@ -25,13 +25,21 @@
+ #include <asm/setup.h>
+ #include <asm/desc.h>
+ #include <asm/pgtable.h>
++#include <asm/tlbflush.h>
+ #include <asm/sections.h>
+
+ unsigned long start_pfn;
+
++#ifndef CONFIG_XEN
++static void __init zap_identity_mappings(void)
++{
++ pgd_t *pgd = pgd_offset_k(0UL);
++ pgd_clear(pgd);
++ __flush_tlb();
++}
++
+ /* Don't add a printk in there. printk relies on the PDA which is not initialized
+ yet. */
+-#if 0
+ static void __init clear_bss(void)
+ {
+ memset(__bss_start, 0,
+@@ -40,26 +48,25 @@ static void __init clear_bss(void)
+ #endif
+
+ #define NEW_CL_POINTER 0x228 /* Relative to real mode data */
+-#define OLD_CL_MAGIC_ADDR 0x90020
++#define OLD_CL_MAGIC_ADDR 0x20
+ #define OLD_CL_MAGIC 0xA33F
+-#define OLD_CL_BASE_ADDR 0x90000
+-#define OLD_CL_OFFSET 0x90022
++#define OLD_CL_OFFSET 0x22
+
+ static void __init copy_bootdata(char *real_mode_data)
+ {
+ #ifndef CONFIG_XEN
+- int new_data;
++ unsigned long new_data;
+ char * command_line;
+
+ memcpy(x86_boot_params, real_mode_data, BOOT_PARAM_SIZE);
+- new_data = *(int *) (x86_boot_params + NEW_CL_POINTER);
++ new_data = *(u32 *) (x86_boot_params + NEW_CL_POINTER);
+ if (!new_data) {
+- if (OLD_CL_MAGIC != * (u16 *) OLD_CL_MAGIC_ADDR) {
++ if (OLD_CL_MAGIC != *(u16 *)(real_mode_data + OLD_CL_MAGIC_ADDR)) {
+ return;
+ }
+- new_data = OLD_CL_BASE_ADDR + * (u16 *) OLD_CL_OFFSET;
++ new_data = __pa(real_mode_data) + *(u16 *)(real_mode_data + OLD_CL_OFFSET);
+ }
+- command_line = (char *) ((u64)(new_data));
++ command_line = __va(new_data);
+ memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+ #else
+ int max_cmdline;
+@@ -101,10 +108,13 @@ void __init x86_64_start_kernel(char * r
+ while ((1UL << machine_to_phys_order) < machine_to_phys_nr_ents )
+ machine_to_phys_order++;
+
+-#if 0
++#ifndef CONFIG_XEN
+ /* clear bss before set_intr_gate with early_idt_handler */
+ clear_bss();
+
++ /* Make NULL pointers segfault */
++ zap_identity_mappings();
++
+ for (i = 0; i < IDT_ENTRIES; i++)
+ set_intr_gate(i, early_idt_handler);
+ asm volatile("lidt %0" :: "m" (idt_descr));
+@@ -116,7 +126,7 @@ void __init x86_64_start_kernel(char * r
+ cpu_pda(i) = &boot_cpu_pda[i];
+
+ pda_init(0);
+- copy_bootdata(real_mode_data);
++ copy_bootdata(__va(real_mode_data));
+ #ifdef CONFIG_SMP
+ cpu_set(0, cpu_online_map);
+ #endif
+--- a/arch/x86/kernel/head_64-xen.S
++++ b/arch/x86/kernel/head_64-xen.S
+@@ -5,6 +5,7 @@
+ * Copyright (C) 2000 Pavel Machek <pavel@suse.cz>
+ * Copyright (C) 2000 Karsten Keil <kkeil@suse.de>
+ * Copyright (C) 2001,2002 Andi Kleen <ak@suse.de>
++ * Copyright (C) 2005 Eric Biederman <ebiederm@xmission.com>
+ * Jun Nakajima <jun.nakajima@intel.com>
+ * Modified for Xen
+ */
+@@ -34,27 +35,15 @@ startup_64:
+ pushq $0 # fake return address
+ jmp x86_64_start_kernel
+
+-#ifdef CONFIG_ACPI_SLEEP
+-.org 0xf00
+- .globl pGDT32
+-pGDT32:
+- .word gdt_end-cpu_gdt_table-1
+- .long cpu_gdt_table-__START_KERNEL_map
+-#endif
+-ENTRY(stext)
+-ENTRY(_stext)
++.balign PAGE_SIZE
+
+- $page = 0
+ #define NEXT_PAGE(name) \
+- $page = $page + 1; \
+- .org $page * 0x1000; \
+- phys_##name = $page * 0x1000 + __PHYSICAL_START; \
++ .balign PAGE_SIZE; \
++ phys_##name = . - .bootstrap.text; \
+ ENTRY(name)
+
+ NEXT_PAGE(init_level4_pgt)
+- /* This gets initialized in x86_64_start_kernel */
+ .fill 512,8,0
+-NEXT_PAGE(init_level4_user_pgt)
+ /*
+ * We update two pgd entries to make kernel and user pgd consistent
+ * at pgd_populate(). It can be used for kernel modules. So we place
+@@ -101,14 +90,6 @@ NEXT_PAGE(hypercall_page)
+ #undef NEXT_PAGE
+
+ .data
+-/* Just dummy symbol to allow compilation. Not used in sleep path */
+-#ifdef CONFIG_ACPI_SLEEP
+- .align PAGE_SIZE
+-ENTRY(wakeup_level4_pgt)
+- .fill 512,8,0
+-#endif
+-
+- .data
+
+ .align 16
+ .globl cpu_gdt_descr
+@@ -136,13 +117,13 @@ gdt:
+
+ ENTRY(cpu_gdt_table)
+ .quad 0x0000000000000000 /* NULL descriptor */
++ .quad 0x00cf9b000000ffff /* __KERNEL32_CS */
++ .quad 0x00af9b000000ffff /* __KERNEL_CS */
++ .quad 0x00cf93000000ffff /* __KERNEL_DS */
++ .quad 0x00cffb000000ffff /* __USER32_CS */
++ .quad 0x00cff3000000ffff /* __USER_DS, __USER32_DS */
++ .quad 0x00affb000000ffff /* __USER_CS */
+ .quad 0x0 /* unused */
+- .quad 0x00af9a000000ffff /* __KERNEL_CS */
+- .quad 0x00cf92000000ffff /* __KERNEL_DS */
+- .quad 0x00cffa000000ffff /* __USER32_CS */
+- .quad 0x00cff2000000ffff /* __USER_DS, __USER32_DS */
+- .quad 0x00affa000000ffff /* __USER_CS */
+- .quad 0x00cf9a000000ffff /* __KERNEL32_CS */
+ .quad 0,0 /* TSS */
+ .quad 0,0 /* LDT */
+ .quad 0,0,0 /* three TLS descriptors */
+@@ -165,14 +146,11 @@ ENTRY(empty_zero_page)
+ * __xen_guest information
+ */
+ .macro utoh value
+- .if (\value) < 0 || (\value) >= 0x10
+- utoh (((\value)>>4)&0x0fffffffffffffff)
+- .endif
+- .if ((\value) & 0xf) < 10
+- .byte '0' + ((\value) & 0xf)
+- .else
+- .byte 'A' + ((\value) & 0xf) - 10
+- .endif
++ i = 64
++ .rept 16
++ i = i - 4
++ .byte '0' + ((((\value) >> i) & 0xf) > 9) * ('0' - 'A' + 10) + (((\value) >> i) & 0xf)
++ .endr
+ .endm
+
+ .section __xen_guest
+--- a/arch/x86/kernel/io_apic_32-xen.c
++++ b/arch/x86/kernel/io_apic_32-xen.c
+@@ -25,7 +25,6 @@
+ #include <linux/init.h>
+ #include <linux/delay.h>
+ #include <linux/sched.h>
+-#include <linux/smp_lock.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/compiler.h>
+ #include <linux/acpi.h>
+@@ -35,6 +34,7 @@
+ #include <linux/msi.h>
+ #include <linux/htirq.h>
+ #include <linux/freezer.h>
++#include <linux/kthread.h>
+
+ #include <asm/io.h>
+ #include <asm/smp.h>
+@@ -710,8 +710,6 @@ static int balanced_irq(void *unused)
+ unsigned long prev_balance_time = jiffies;
+ long time_remaining = balanced_irq_interval;
+
+- daemonize("kirqd");
+-
+ /* push everything to CPU 0 to give us a starting point. */
+ for (i = 0 ; i < NR_IRQS ; i++) {
+ irq_desc[i].pending_mask = cpumask_of_cpu(0);
+@@ -771,10 +769,9 @@ static int __init balanced_irq_init(void
+ }
+
+ printk(KERN_INFO "Starting balanced_irq\n");
+- if (kernel_thread(balanced_irq, NULL, CLONE_KERNEL) >= 0)
++ if (!IS_ERR(kthread_run(balanced_irq, NULL, "kirqd")))
+ return 0;
+- else
+- printk(KERN_ERR "balanced_irq_init: failed to spawn balanced_irq");
++ printk(KERN_ERR "balanced_irq_init: failed to spawn balanced_irq");
+ failed:
+ for_each_possible_cpu(i) {
+ kfree(irq_cpu_data[i].irq_delta);
+@@ -1455,10 +1452,6 @@ static void __init setup_ExtINT_IRQ0_pin
+ enable_8259A_irq(0);
+ }
+
+-static inline void UNEXPECTED_IO_APIC(void)
+-{
+-}
+-
+ void __init print_IO_APIC(void)
+ {
+ int apic, i;
+@@ -1498,34 +1491,12 @@ void __init print_IO_APIC(void)
+ printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID);
+ printk(KERN_DEBUG "....... : Delivery Type: %X\n", reg_00.bits.delivery_type);
+ printk(KERN_DEBUG "....... : LTS : %X\n", reg_00.bits.LTS);
+- if (reg_00.bits.ID >= get_physical_broadcast())
+- UNEXPECTED_IO_APIC();
+- if (reg_00.bits.__reserved_1 || reg_00.bits.__reserved_2)
+- UNEXPECTED_IO_APIC();
+
+ printk(KERN_DEBUG ".... register #01: %08X\n", reg_01.raw);
+ printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries);
+- if ( (reg_01.bits.entries != 0x0f) && /* older (Neptune) boards */
+- (reg_01.bits.entries != 0x17) && /* typical ISA+PCI boards */
+- (reg_01.bits.entries != 0x1b) && /* Compaq Proliant boards */
+- (reg_01.bits.entries != 0x1f) && /* dual Xeon boards */
+- (reg_01.bits.entries != 0x22) && /* bigger Xeon boards */
+- (reg_01.bits.entries != 0x2E) &&
+- (reg_01.bits.entries != 0x3F)
+- )
+- UNEXPECTED_IO_APIC();
+
+ printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ);
+ printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version);
+- if ( (reg_01.bits.version != 0x01) && /* 82489DX IO-APICs */
+- (reg_01.bits.version != 0x10) && /* oldest IO-APICs */
+- (reg_01.bits.version != 0x11) && /* Pentium/Pro IO-APICs */
+- (reg_01.bits.version != 0x13) && /* Xeon IO-APICs */
+- (reg_01.bits.version != 0x20) /* Intel P64H (82806 AA) */
+- )
+- UNEXPECTED_IO_APIC();
+- if (reg_01.bits.__reserved_1 || reg_01.bits.__reserved_2)
+- UNEXPECTED_IO_APIC();
+
+ /*
+ * Some Intel chipsets with IO APIC VERSION of 0x1? don't have reg_02,
+@@ -1535,8 +1506,6 @@ void __init print_IO_APIC(void)
+ if (reg_01.bits.version >= 0x10 && reg_02.raw != reg_01.raw) {
+ printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw);
+ printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration);
+- if (reg_02.bits.__reserved_1 || reg_02.bits.__reserved_2)
+- UNEXPECTED_IO_APIC();
+ }
+
+ /*
+@@ -1548,8 +1517,6 @@ void __init print_IO_APIC(void)
+ reg_03.raw != reg_01.raw) {
+ printk(KERN_DEBUG ".... register #03: %08X\n", reg_03.raw);
+ printk(KERN_DEBUG "....... : Boot DT : %X\n", reg_03.bits.boot_DT);
+- if (reg_03.bits.__reserved_1)
+- UNEXPECTED_IO_APIC();
+ }
+
+ printk(KERN_DEBUG ".... IRQ redirection table:\n");
+@@ -2686,19 +2653,19 @@ int arch_setup_msi_irq(struct pci_dev *d
+ if (irq < 0)
+ return irq;
+
+- set_irq_msi(irq, desc);
+ ret = msi_compose_msg(dev, irq, &msg);
+ if (ret < 0) {
+ destroy_irq(irq);
+ return ret;
+ }
+
++ set_irq_msi(irq, desc);
+ write_msi_msg(irq, &msg);
+
+ set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq,
+ "edge");
+
+- return irq;
++ return 0;
+ }
+
+ void arch_teardown_msi_irq(unsigned int irq)
+--- a/arch/x86/kernel/io_apic_64-xen.c
++++ b/arch/x86/kernel/io_apic_64-xen.c
+@@ -25,7 +25,6 @@
+ #include <linux/init.h>
+ #include <linux/delay.h>
+ #include <linux/sched.h>
+-#include <linux/smp_lock.h>
+ #include <linux/pci.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/acpi.h>
+@@ -904,10 +903,6 @@ static void __init setup_ExtINT_IRQ0_pin
+ enable_8259A_irq(0);
+ }
+
+-void __init UNEXPECTED_IO_APIC(void)
+-{
+-}
+-
+ void __apicdebuginit print_IO_APIC(void)
+ {
+ int apic, i;
+@@ -943,40 +938,16 @@ void __apicdebuginit print_IO_APIC(void)
+ printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mpc_apicid);
+ printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw);
+ printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID);
+- if (reg_00.bits.__reserved_1 || reg_00.bits.__reserved_2)
+- UNEXPECTED_IO_APIC();
+
+ printk(KERN_DEBUG ".... register #01: %08X\n", *(int *)®_01);
+ printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries);
+- if ( (reg_01.bits.entries != 0x0f) && /* older (Neptune) boards */
+- (reg_01.bits.entries != 0x17) && /* typical ISA+PCI boards */
+- (reg_01.bits.entries != 0x1b) && /* Compaq Proliant boards */
+- (reg_01.bits.entries != 0x1f) && /* dual Xeon boards */
+- (reg_01.bits.entries != 0x22) && /* bigger Xeon boards */
+- (reg_01.bits.entries != 0x2E) &&
+- (reg_01.bits.entries != 0x3F) &&
+- (reg_01.bits.entries != 0x03)
+- )
+- UNEXPECTED_IO_APIC();
+
+ printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ);
+ printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version);
+- if ( (reg_01.bits.version != 0x01) && /* 82489DX IO-APICs */
+- (reg_01.bits.version != 0x02) && /* 82801BA IO-APICs (ICH2) */
+- (reg_01.bits.version != 0x10) && /* oldest IO-APICs */
+- (reg_01.bits.version != 0x11) && /* Pentium/Pro IO-APICs */
+- (reg_01.bits.version != 0x13) && /* Xeon IO-APICs */
+- (reg_01.bits.version != 0x20) /* Intel P64H (82806 AA) */
+- )
+- UNEXPECTED_IO_APIC();
+- if (reg_01.bits.__reserved_1 || reg_01.bits.__reserved_2)
+- UNEXPECTED_IO_APIC();
+
+ if (reg_01.bits.version >= 0x10) {
+ printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw);
+ printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration);
+- if (reg_02.bits.__reserved_1 || reg_02.bits.__reserved_2)
+- UNEXPECTED_IO_APIC();
+ }
+
+ printk(KERN_DEBUG ".... IRQ redirection table:\n");
+@@ -1408,8 +1379,7 @@ static void irq_complete_move(unsigned i
+
+ vector = ~get_irq_regs()->orig_rax;
+ me = smp_processor_id();
+- if ((vector == cfg->vector) &&
+- cpu_isset(smp_processor_id(), cfg->domain)) {
++ if ((vector == cfg->vector) && cpu_isset(me, cfg->domain)) {
+ cpumask_t cleanup_mask;
+
+ cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map);
+@@ -1444,7 +1414,7 @@ static void ack_apic_level(unsigned int
+
+ /*
+ * We must acknowledge the irq before we move it or the acknowledge will
+- * not propogate properly.
++ * not propagate properly.
+ */
+ ack_APIC_irq();
+
+@@ -1527,6 +1497,7 @@ static void ack_lapic_irq (unsigned int
+ static void end_lapic_irq (unsigned int i) { /* nothing */ }
+
+ static struct hw_interrupt_type lapic_irq_type __read_mostly = {
++ .name = "local-APIC",
+ .typename = "local-APIC-edge",
+ .startup = NULL, /* startup_irq() not used for IRQ0 */
+ .shutdown = NULL, /* shutdown_irq() not used for IRQ0 */
+@@ -1998,18 +1969,18 @@ int arch_setup_msi_irq(struct pci_dev *d
+ if (irq < 0)
+ return irq;
+
+- set_irq_msi(irq, desc);
+ ret = msi_compose_msg(dev, irq, &msg);
+ if (ret < 0) {
+ destroy_irq(irq);
+ return ret;
+ }
+
++ set_irq_msi(irq, desc);
+ write_msi_msg(irq, &msg);
+
+ set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq, "edge");
+
+- return irq;
++ return 0;
+ }
+
+ void arch_teardown_msi_irq(unsigned int irq)
+--- a/arch/x86/kernel/ioport_32-xen.c
++++ b/arch/x86/kernel/ioport_32-xen.c
+@@ -12,10 +12,10 @@
+ #include <linux/types.h>
+ #include <linux/ioport.h>
+ #include <linux/smp.h>
+-#include <linux/smp_lock.h>
+ #include <linux/stddef.h>
+ #include <linux/slab.h>
+ #include <linux/thread_info.h>
++#include <linux/syscalls.h>
+ #include <xen/interface/physdev.h>
+
+ /* Set EXTENT bits starting at BASE in BITMAP to value TURN_ON. */
+--- a/arch/x86/kernel/ioport_64-xen.c
++++ b/arch/x86/kernel/ioport_64-xen.c
+@@ -13,10 +13,10 @@
+ #include <linux/ioport.h>
+ #include <linux/mm.h>
+ #include <linux/smp.h>
+-#include <linux/smp_lock.h>
+ #include <linux/stddef.h>
+ #include <linux/slab.h>
+ #include <linux/thread_info.h>
++#include <linux/syscalls.h>
+ #include <xen/interface/physdev.h>
+
+ /* Set EXTENT bits starting at BASE in BITMAP to value TURN_ON. */
+--- a/arch/x86/kernel/irq_32-xen.c
++++ b/arch/x86/kernel/irq_32-xen.c
+@@ -24,6 +24,9 @@
+ DEFINE_PER_CPU(irq_cpustat_t, irq_stat) ____cacheline_internodealigned_in_smp;
+ EXPORT_PER_CPU_SYMBOL(irq_stat);
+
++DEFINE_PER_CPU(struct pt_regs *, irq_regs);
++EXPORT_PER_CPU_SYMBOL(irq_regs);
++
+ /*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves.
+--- a/arch/x86/kernel/irq_64-xen.c
++++ b/arch/x86/kernel/irq_64-xen.c
+@@ -32,7 +32,7 @@ atomic_t irq_err_count;
+ */
+ static inline void stack_overflow_check(struct pt_regs *regs)
+ {
+- u64 curbase = (u64) current->thread_info;
++ u64 curbase = (u64)task_stack_page(current);
+ static unsigned long warned = -60*HZ;
+
+ if (regs->rsp >= curbase && regs->rsp <= curbase + THREAD_SIZE &&
+@@ -145,17 +145,43 @@ void fixup_irqs(cpumask_t map)
+
+ for (irq = 0; irq < NR_IRQS; irq++) {
+ cpumask_t mask;
++ int break_affinity = 0;
++ int set_affinity = 1;
++
+ if (irq == 2)
+ continue;
+
++ /* interrupt's are disabled at this point */
++ spin_lock(&irq_desc[irq].lock);
++
++ if (!irq_has_action(irq) ||
++ cpus_equal(irq_desc[irq].affinity, map)) {
++ spin_unlock(&irq_desc[irq].lock);
++ continue;
++ }
++
+ cpus_and(mask, irq_desc[irq].affinity, map);
+- if (any_online_cpu(mask) == NR_CPUS) {
+- /*printk("Breaking affinity for irq %i\n", irq);*/
++ if (cpus_empty(mask)) {
++ break_affinity = 1;
+ mask = map;
+ }
++
++ if (irq_desc[irq].chip->mask)
++ irq_desc[irq].chip->mask(irq);
++
+ if (irq_desc[irq].chip->set_affinity)
+ irq_desc[irq].chip->set_affinity(irq, mask);
+- else if (irq_desc[irq].action && !(warned++))
++ else if (!(warned++))
++ set_affinity = 0;
++
++ if (irq_desc[irq].chip->unmask)
++ irq_desc[irq].chip->unmask(irq);
++
++ spin_unlock(&irq_desc[irq].lock);
++
++ if (break_affinity && set_affinity)
++ /*printk("Broke affinity for irq %i\n", irq)*/;
++ else if (!set_affinity)
+ printk("Cannot set affinity for irq %i\n", irq);
+ }
+
+--- a/arch/x86/kernel/ldt_32-xen.c
++++ b/arch/x86/kernel/ldt_32-xen.c
+@@ -10,7 +10,6 @@
+ #include <linux/string.h>
+ #include <linux/mm.h>
+ #include <linux/smp.h>
+-#include <linux/smp_lock.h>
+ #include <linux/vmalloc.h>
+ #include <linux/slab.h>
+
+--- a/arch/x86/kernel/ldt_64-xen.c
++++ b/arch/x86/kernel/ldt_64-xen.c
+@@ -13,7 +13,6 @@
+ #include <linux/string.h>
+ #include <linux/mm.h>
+ #include <linux/smp.h>
+-#include <linux/smp_lock.h>
+ #include <linux/vmalloc.h>
+ #include <linux/slab.h>
+
+--- a/arch/x86/kernel/Makefile
++++ b/arch/x86/kernel/Makefile
+@@ -127,4 +127,4 @@ endif
+ disabled-obj-$(CONFIG_XEN) := early-quirks.o hpet.o i8253.o i8259_$(BITS).o reboot.o \
+ smpboot_$(BITS).o tsc_$(BITS).o tsc_sync.o
+ disabled-obj-$(CONFIG_XEN_UNPRIVILEGED_GUEST) += mpparse_64.o
+-%/head_$(BITS).o %/head_$(BITS).s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
++%/head_64.o %/head_64.s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
+--- a/arch/x86/kernel/microcode-xen.c
++++ b/arch/x86/kernel/microcode-xen.c
+@@ -135,7 +135,7 @@ static int __init microcode_dev_init (vo
+ return 0;
+ }
+
+-static void __exit microcode_dev_exit (void)
++static void microcode_dev_exit (void)
+ {
+ misc_deregister(µcode_dev);
+ }
+--- a/arch/x86/kernel/mpparse_32-xen.c
++++ b/arch/x86/kernel/mpparse_32-xen.c
+@@ -18,7 +18,6 @@
+ #include <linux/acpi.h>
+ #include <linux/delay.h>
+ #include <linux/bootmem.h>
+-#include <linux/smp_lock.h>
+ #include <linux/kernel_stat.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/bitops.h>
+@@ -484,7 +483,7 @@ static int __init smp_read_mpc(struct mp
+ }
+ ++mpc_record;
+ }
+- clustered_apic_check();
++ setup_apic_routing();
+ if (!num_processors)
+ printk(KERN_ERR "SMP mptable: no processors registered!\n");
+ return num_processors;
+--- a/arch/x86/kernel/mpparse_64-xen.c
++++ b/arch/x86/kernel/mpparse_64-xen.c
+@@ -17,7 +17,6 @@
+ #include <linux/init.h>
+ #include <linux/delay.h>
+ #include <linux/bootmem.h>
+-#include <linux/smp_lock.h>
+ #include <linux/kernel_stat.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/acpi.h>
+@@ -307,7 +306,7 @@ static int __init smp_read_mpc(struct mp
+ }
+ }
+ }
+- clustered_apic_check();
++ setup_apic_routing();
+ if (!num_processors)
+ printk(KERN_ERR "MPTABLE: no processors registered!\n");
+ return num_processors;
+--- a/arch/x86/kernel/pci-dma-xen.c
++++ b/arch/x86/kernel/pci-dma-xen.c
+@@ -13,6 +13,7 @@
+ #include <linux/pci.h>
+ #include <linux/module.h>
+ #include <linux/version.h>
++#include <linux/pci.h>
+ #include <asm/io.h>
+ #include <xen/balloon.h>
+ #include <xen/gnttab.h>
+@@ -278,7 +279,7 @@ int dma_declare_coherent_memory(struct d
+ {
+ void __iomem *mem_base = NULL;
+ int pages = size >> PAGE_SHIFT;
+- int bitmap_size = (pages + 31)/32;
++ int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
+
+ if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0)
+ goto out;
+@@ -351,6 +352,32 @@ void *dma_mark_declared_memory_occupied(
+ EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
+ #endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
+
++#if defined(CONFIG_PCI) && !defined(CONFIG_XEN)
++/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
++
++int forbid_dac;
++EXPORT_SYMBOL(forbid_dac);
++
++static __devinit void via_no_dac(struct pci_dev *dev)
++{
++ if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
++ printk(KERN_INFO "PCI: VIA PCI bridge detected. Disabling DAC.\n");
++ forbid_dac = 1;
++ }
++}
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
++
++static int check_iommu(char *s)
++{
++ if (!strcmp(s, "usedac")) {
++ forbid_dac = -1;
++ return 1;
++ }
++ return 0;
++}
++__setup("iommu=", check_iommu);
++#endif
++
+ dma_addr_t
+ dma_map_single(struct device *dev, void *ptr, size_t size,
+ enum dma_data_direction direction)
+--- a/arch/x86/kernel/process_32-xen.c
++++ b/arch/x86/kernel/process_32-xen.c
+@@ -21,7 +21,6 @@
+ #include <linux/mm.h>
+ #include <linux/elfcore.h>
+ #include <linux/smp.h>
+-#include <linux/smp_lock.h>
+ #include <linux/stddef.h>
+ #include <linux/slab.h>
+ #include <linux/vmalloc.h>
+@@ -39,6 +38,7 @@
+ #include <linux/random.h>
+ #include <linux/personality.h>
+ #include <linux/tick.h>
++#include <linux/percpu.h>
+
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -61,7 +61,6 @@
+
+ #include <asm/tlbflush.h>
+ #include <asm/cpu.h>
+-#include <asm/pda.h>
+
+ asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
+
+@@ -70,6 +69,12 @@ static int hlt_counter;
+ unsigned long boot_option_idle_override = 0;
+ EXPORT_SYMBOL(boot_option_idle_override);
+
++DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
++EXPORT_PER_CPU_SYMBOL(current_task);
++
++DEFINE_PER_CPU(int, cpu_number);
++EXPORT_PER_CPU_SYMBOL(cpu_number);
++
+ /*
+ * Return saved PC of a blocked thread.
+ */
+@@ -168,6 +173,7 @@ void cpu_idle(void)
+ if (__get_cpu_var(cpu_idle_state))
+ __get_cpu_var(cpu_idle_state) = 0;
+
++ check_pgt_cache();
+ rmb();
+ idle = xen_idle; /* no alternatives */
+
+@@ -218,18 +224,19 @@ void __devinit select_idle_routine(const
+ {
+ }
+
+-static int __init idle_setup (char *str)
++static int __init idle_setup(char *str)
+ {
+- if (!strncmp(str, "poll", 4)) {
++ if (!strcmp(str, "poll")) {
+ printk("using polling idle threads.\n");
+ pm_idle = poll_idle;
+ }
++ else
++ return -1;
+
+ boot_option_idle_override = 1;
+- return 1;
++ return 0;
+ }
+-
+-__setup("idle=", idle_setup);
++early_param("idle", idle_setup);
+
+ void show_regs(struct pt_regs * regs)
+ {
+@@ -282,7 +289,7 @@ int kernel_thread(int (*fn)(void *), voi
+
+ regs.xds = __USER_DS;
+ regs.xes = __USER_DS;
+- regs.xfs = __KERNEL_PDA;
++ regs.xfs = __KERNEL_PERCPU;
+ regs.orig_eax = -1;
+ regs.eip = (unsigned long) kernel_thread_helper;
+ regs.xcs = __KERNEL_CS | get_kernel_rpl();
+@@ -562,7 +569,7 @@ struct task_struct fastcall * __switch_t
+ * multicall to indicate FPU task switch, rather than
+ * synchronously trapping to Xen.
+ */
+- if (prev_p->thread_info->status & TS_USEDFPU) {
++ if (task_thread_info(prev_p)->status & TS_USEDFPU) {
+ __save_init_fpu(prev_p); /* _not_ save_init_fpu() */
+ mcl->op = __HYPERVISOR_fpu_taskswitch;
+ mcl->args[0] = 1;
+@@ -669,7 +676,7 @@ struct task_struct fastcall * __switch_t
+ if (prev->gs | next->gs)
+ loadsegment(gs, next->gs);
+
+- write_pda(pcurrent, next_p);
++ x86_write_percpu(current_task, next_p);
+
+ return prev_p;
+ }
+--- a/arch/x86/kernel/process_64-xen.c
++++ b/arch/x86/kernel/process_64-xen.c
+@@ -39,6 +39,7 @@
+ #include <linux/random.h>
+ #include <linux/notifier.h>
+ #include <linux/kprobes.h>
++#include <linux/kdebug.h>
+
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -49,7 +50,6 @@
+ #include <asm/mmu_context.h>
+ #include <asm/pda.h>
+ #include <asm/prctl.h>
+-#include <asm/kdebug.h>
+ #include <xen/interface/platform.h>
+ #include <xen/interface/physdev.h>
+ #include <xen/interface/vcpu.h>
+@@ -232,16 +232,18 @@ void __cpuinit select_idle_routine(const
+
+ static int __init idle_setup (char *str)
+ {
+- if (!strncmp(str, "poll", 4)) {
++ if (!strcmp(str, "poll")) {
+ printk("using polling idle threads.\n");
+ pm_idle = poll_idle;
+- }
++ } else if (!strcmp(str, "mwait"))
++ force_mwait = 1;
++ else
++ return -1;
+
+ boot_option_idle_override = 1;
+- return 1;
++ return 0;
+ }
+-
+-__setup("idle=", idle_setup);
++early_param("idle", idle_setup);
+
+ /* Prints also some state that isn't saved in the pt_regs */
+ void __show_regs(struct pt_regs * regs)
+@@ -546,7 +548,7 @@ __switch_to(struct task_struct *prev_p,
+ * The AMD workaround requires it to be after DS reload, or
+ * after DS has been cleared, which we do in __prepare_arch_switch.
+ */
+- if (prev_p->thread_info->status & TS_USEDFPU) {
++ if (task_thread_info(prev_p)->status & TS_USEDFPU) {
+ __save_init_fpu(prev_p); /* _not_ save_init_fpu() */
+ mcl->op = __HYPERVISOR_fpu_taskswitch;
+ mcl->args[0] = 1;
+--- a/arch/x86/kernel/quirks-xen.c
++++ b/arch/x86/kernel/quirks-xen.c
+@@ -3,12 +3,10 @@
+ */
+ #include <linux/pci.h>
+ #include <linux/irq.h>
+-#include <asm/pci-direct.h>
+-#include <asm/genapic.h>
+-#include <asm/cpu.h>
+
+ #if defined(CONFIG_X86_IO_APIC) && (defined(CONFIG_SMP) || defined(CONFIG_XEN)) && defined(CONFIG_PCI)
+-static void __devinit verify_quirk_intel_irqbalance(struct pci_dev *dev)
++
++static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
+ {
+ u8 config, rev;
+ u32 word;
+@@ -16,7 +14,7 @@ static void __devinit verify_quirk_intel
+ /* BIOS may enable hardware IRQ balancing for
+ * E7520/E7320/E7525(revision ID 0x9 and below)
+ * based platforms.
+- * For those platforms, make sure that the genapic is set to 'flat'
++ * Disable SW irqbalance/affinity on those platforms.
+ */
+ pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
+ if (rev > 0x9)
+@@ -30,59 +28,20 @@ static void __devinit verify_quirk_intel
+ raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
+
+ if (!(word & (1 << 13))) {
+-#ifndef CONFIG_XEN
+-#ifdef CONFIG_X86_64
+- if (genapic != &apic_flat)
+- panic("APIC mode must be flat on this system\n");
+-#elif defined(CONFIG_X86_GENERICARCH)
+- if (genapic != &apic_default)
+- panic("APIC mode must be default(flat) on this system. Use apic=default\n");
+-#endif
+-#endif
+- }
+-
+- /* put back the original value for config space*/
+- if (!(config & 0x2))
+- pci_write_config_byte(dev, 0xf4, config);
+-}
+-
+-void __init quirk_intel_irqbalance(void)
+-{
+- u8 config, rev;
+- u32 word;
+-
+- /* BIOS may enable hardware IRQ balancing for
+- * E7520/E7320/E7525(revision ID 0x9 and below)
+- * based platforms.
+- * Disable SW irqbalance/affinity on those platforms.
+- */
+- rev = read_pci_config_byte(0, 0, 0, PCI_CLASS_REVISION);
+- if (rev > 0x9)
+- return;
+-
+- printk(KERN_INFO "Intel E7520/7320/7525 detected.");
+-
+- /* enable access to config space */
+- config = read_pci_config_byte(0, 0, 0, 0xf4);
+- write_pci_config_byte(0, 0, 0, 0xf4, config|0x2);
+-
+- /* read xTPR register */
+- word = read_pci_config_16(0, 0, 0x40, 0x4c);
+-
+- if (!(word & (1 << 13))) {
+ struct xen_platform_op op;
+- printk(KERN_INFO "Disabling irq balancing and affinity\n");
++
++ printk(KERN_INFO "Intel E7520/7320/7525 detected. "
++ "Disabling irq balancing and affinity\n");
+ op.cmd = XENPF_platform_quirk;
+ op.u.platform_quirk.quirk_id = QUIRK_NOIRQBALANCING;
+ WARN_ON(HYPERVISOR_platform_op(&op));
+ }
+
+- /* put back the original value for config space */
++ /* put back the original value for config space*/
+ if (!(config & 0x2))
+- write_pci_config_byte(0, 0, 0, 0xf4, config);
++ pci_write_config_byte(dev, 0xf4, config);
+ }
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, verify_quirk_intel_irqbalance);
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, verify_quirk_intel_irqbalance);
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, verify_quirk_intel_irqbalance);
+-
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_intel_irqbalance);
+ #endif
+--- a/arch/x86/kernel/setup_64-xen.c
++++ b/arch/x86/kernel/setup_64-xen.c
+@@ -120,6 +120,8 @@ int bootloader_type;
+
+ unsigned long saved_video_mode;
+
++int force_mwait __cpuinitdata;
++
+ /*
+ * Early DMI memory
+ */
+@@ -253,10 +255,10 @@ static void discover_ebda(void)
+ * there is a real-mode segmented pointer pointing to the
+ * 4K EBDA area at 0x40E
+ */
+- ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
++ ebda_addr = *(unsigned short *)__va(EBDA_ADDR_POINTER);
+ ebda_addr <<= 4;
+
+- ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
++ ebda_size = *(unsigned short *)__va(ebda_addr);
+
+ /* Round EBDA up to pages */
+ if (ebda_size == 0)
+@@ -410,15 +412,8 @@ void __init setup_arch(char **cmdline_p)
+ #endif
+
+ #ifdef CONFIG_SMP
+- /*
+- * But first pinch a few for the stack/trampoline stuff
+- * FIXME: Don't need the extra page at 4K, but need to fix
+- * trampoline before removing it. (see the GDT stuff)
+- */
+- reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
+-
+ /* Reserve SMP trampoline */
+- reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
++ reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, 2*PAGE_SIZE);
+ #endif
+ #endif
+
+@@ -570,8 +565,6 @@ void __init setup_arch(char **cmdline_p)
+ early_quirks();
+ #endif
+
+- zap_low_mappings(0);
+-
+ /*
+ * set this early, so we dont allocate cpu0
+ * if MADT list doesnt list BSP first
+@@ -864,6 +857,10 @@ static void __cpuinit init_amd(struct cp
+
+ /* RDTSC can be speculated around */
+ clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
++
++ /* Family 10 doesn't support C states in MWAIT so don't use it */
++ if (c->x86 == 0x10 && !force_mwait)
++ clear_bit(X86_FEATURE_MWAIT, &c->x86_capability);
+ }
+
+ static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
+@@ -1146,9 +1143,7 @@ void __cpuinit identify_cpu(struct cpuin
+ #ifdef CONFIG_X86_MCE
+ mcheck_init(c);
+ #endif
+- if (c == &boot_cpu_data)
+- mtrr_bp_init();
+- else
++ if (c != &boot_cpu_data)
+ mtrr_ap_init();
+ #ifdef CONFIG_NUMA
+ numa_add_cpu(smp_processor_id());
+@@ -1239,9 +1234,8 @@ static int show_cpuinfo(struct seq_file
+ "stc",
+ "100mhzsteps",
+ "hwpstate",
+- NULL, /* tsc invariant mapped to constant_tsc */
+- NULL,
+- /* nothing */ /* constant_tsc - moved to flags */
++ "", /* tsc invariant mapped to constant_tsc */
++ /* nothing */
+ };
+
+
+--- a/arch/x86/kernel/setup64-xen.c
++++ b/arch/x86/kernel/setup64-xen.c
+@@ -113,9 +113,9 @@ void __init setup_per_cpu_areas(void)
+ if (!NODE_DATA(cpu_to_node(i))) {
+ printk("cpu with no node %d, num_online_nodes %d\n",
+ i, num_online_nodes());
+- ptr = alloc_bootmem(size);
++ ptr = alloc_bootmem_pages(size);
+ } else {
+- ptr = alloc_bootmem_node(NODE_DATA(cpu_to_node(i)), size);
++ ptr = alloc_bootmem_pages_node(NODE_DATA(cpu_to_node(i)), size);
+ }
+ if (!ptr)
+ panic("Cannot allocate cpu data for CPU %d\n", i);
+@@ -208,6 +208,8 @@ char boot_exception_stacks[(N_EXCEPTION_
+ __attribute__((section(".bss.page_aligned")));
+ #endif
+
++extern asmlinkage void ignore_sysret(void);
++
+ /* May not be marked __init: used by software suspend */
+ void syscall_init(void)
+ {
+@@ -219,12 +221,22 @@ void syscall_init(void)
+ */
+ wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32);
+ wrmsrl(MSR_LSTAR, system_call);
++ wrmsrl(MSR_CSTAR, ignore_sysret);
+
+ /* Flags to clear on syscall */
+ wrmsrl(MSR_SYSCALL_MASK, EF_TF|EF_DF|EF_IE|0x3000);
+ #endif
+ #ifdef CONFIG_IA32_EMULATION
+ syscall32_cpu_init ();
++#else
++ {
++ static const struct callback_register cstar = {
++ .type = CALLBACKTYPE_syscall32,
++ .address = (unsigned long)ignore_sysret
++ };
++ if (HYPERVISOR_callback_op(CALLBACKOP_register, &cstar))
++ printk(KERN_WARN "Unable to register CSTAR callback\n");
++ }
+ #endif
+ }
+
+@@ -262,7 +274,6 @@ void __cpuinit cpu_init (void)
+ /* CPU 0 is initialised in head64.c */
+ if (cpu != 0) {
+ pda_init(cpu);
+- zap_low_mappings(cpu);
+ }
+ #ifndef CONFIG_X86_NO_TSS
+ else
+--- a/arch/x86/kernel/smp_32-xen.c
++++ b/arch/x86/kernel/smp_32-xen.c
+@@ -13,7 +13,6 @@
+ #include <linux/mm.h>
+ #include <linux/delay.h>
+ #include <linux/spinlock.h>
+-#include <linux/smp_lock.h>
+ #include <linux/kernel_stat.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/cache.h>
+@@ -216,7 +215,6 @@ static cpumask_t flush_cpumask;
+ static struct mm_struct * flush_mm;
+ static unsigned long flush_va;
+ static DEFINE_SPINLOCK(tlbstate_lock);
+-#define FLUSH_ALL 0xffffffff
+
+ /*
+ * We cannot call mmdrop() because we are in interrupt context,
+@@ -298,7 +296,7 @@ irqreturn_t smp_invalidate_interrupt(int
+
+ if (flush_mm == per_cpu(cpu_tlbstate, cpu).active_mm) {
+ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK) {
+- if (flush_va == FLUSH_ALL)
++ if (flush_va == TLB_FLUSH_ALL)
+ local_flush_tlb();
+ else
+ __flush_tlb_one(flush_va);
+@@ -314,9 +312,11 @@ out:
+ return IRQ_HANDLED;
+ }
+
+-static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
+- unsigned long va)
++void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
++ unsigned long va)
+ {
++ cpumask_t cpumask = *cpumaskp;
++
+ /*
+ * A couple of (to be removed) sanity checks:
+ *
+@@ -327,10 +327,12 @@ static void flush_tlb_others(cpumask_t c
+ BUG_ON(cpu_isset(smp_processor_id(), cpumask));
+ BUG_ON(!mm);
+
++#ifdef CONFIG_HOTPLUG_CPU
+ /* If a CPU which we ran on has gone down, OK. */
+ cpus_and(cpumask, cpumask, cpu_online_map);
+- if (cpus_empty(cpumask))
++ if (unlikely(cpus_empty(cpumask)))
+ return;
++#endif
+
+ /*
+ * i'm not happy about this global shared spinlock in the
+@@ -341,17 +343,7 @@ static void flush_tlb_others(cpumask_t c
+
+ flush_mm = mm;
+ flush_va = va;
+-#if NR_CPUS <= BITS_PER_LONG
+- atomic_set_mask(cpumask, &flush_cpumask);
+-#else
+- {
+- int k;
+- unsigned long *flush_mask = (unsigned long *)&flush_cpumask;
+- unsigned long *cpu_mask = (unsigned long *)&cpumask;
+- for (k = 0; k < BITS_TO_LONGS(NR_CPUS); ++k)
+- atomic_set_mask(cpu_mask[k], &flush_mask[k]);
+- }
+-#endif
++ cpus_or(flush_cpumask, cpumask, flush_cpumask);
+ /*
+ * We have to send the IPI only to
+ * CPUs affected.
+@@ -378,7 +370,7 @@ void flush_tlb_current_task(void)
+
+ local_flush_tlb();
+ if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
++ flush_tlb_others(cpu_mask, mm, TLB_FLUSH_ALL);
+ preempt_enable();
+ }
+
+@@ -397,7 +389,7 @@ void flush_tlb_mm (struct mm_struct * mm
+ leave_mm(smp_processor_id());
+ }
+ if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
++ flush_tlb_others(cpu_mask, mm, TLB_FLUSH_ALL);
+
+ preempt_enable();
+ }
+@@ -446,7 +438,7 @@ void flush_tlb_all(void)
+ * it goes straight through and wastes no time serializing
+ * anything. Worst case is that we lose a reschedule ...
+ */
+-void smp_send_reschedule(int cpu)
++void xen_smp_send_reschedule(int cpu)
+ {
+ WARN_ON(cpu_is_offline(cpu));
+ send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
+@@ -478,36 +470,79 @@ void unlock_ipi_call_lock(void)
+
+ static struct call_data_struct *call_data;
+
++static void __smp_call_function(void (*func) (void *info), void *info,
++ int nonatomic, int wait)
++{
++ struct call_data_struct data;
++ int cpus = num_online_cpus() - 1;
++
++ if (!cpus)
++ return;
++
++ data.func = func;
++ data.info = info;
++ atomic_set(&data.started, 0);
++ data.wait = wait;
++ if (wait)
++ atomic_set(&data.finished, 0);
++
++ call_data = &data;
++ mb();
++
++ /* Send a message to all other CPUs and wait for them to respond */
++ send_IPI_allbutself(CALL_FUNCTION_VECTOR);
++
++ /* Wait for response */
++ while (atomic_read(&data.started) != cpus)
++ cpu_relax();
++
++ if (wait)
++ while (atomic_read(&data.finished) != cpus)
++ cpu_relax();
++}
++
++
+ /**
+- * smp_call_function(): Run a function on all other CPUs.
++ * smp_call_function_mask(): Run a function on a set of other CPUs.
++ * @mask: The set of cpus to run on. Must not include the current cpu.
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+- * @nonatomic: currently unused.
+ * @wait: If true, wait (atomically) until function has completed on other CPUs.
+ *
+- * Returns 0 on success, else a negative status code. Does not return until
+- * remote CPUs are nearly ready to execute <<func>> or are or have executed.
++ * Returns 0 on success, else a negative status code.
++ *
++ * If @wait is true, then returns once @func has returned; otherwise
++ * it returns just before the target cpu calls @func.
+ *
+ * You must not call this function with disabled interrupts or from a
+ * hardware interrupt handler or from a bottom half handler.
+ */
+-int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
+- int wait)
++int
++xen_smp_call_function_mask(cpumask_t mask,
++ void (*func)(void *), void *info,
++ int wait)
+ {
+ struct call_data_struct data;
++ cpumask_t allbutself;
+ int cpus;
+
++ /* Can deadlock when called with interrupts disabled */
++ WARN_ON(irqs_disabled());
++
+ /* Holding any lock stops cpus from going down. */
+ spin_lock(&call_lock);
+- cpus = num_online_cpus() - 1;
++
++ allbutself = cpu_online_map;
++ cpu_clear(smp_processor_id(), allbutself);
++
++ cpus_and(mask, mask, allbutself);
++ cpus = cpus_weight(mask);
++
+ if (!cpus) {
+ spin_unlock(&call_lock);
+ return 0;
+ }
+
+- /* Can deadlock when called with interrupts disabled */
+- WARN_ON(irqs_disabled());
+-
+ data.func = func;
+ data.info = info;
+ atomic_set(&data.started, 0);
+@@ -517,9 +552,12 @@ int smp_call_function (void (*func) (voi
+
+ call_data = &data;
+ mb();
+-
+- /* Send a message to all other CPUs and wait for them to respond */
+- send_IPI_allbutself(CALL_FUNCTION_VECTOR);
++
++ /* Send a message to other CPUs */
++ if (cpus_equal(mask, allbutself))
++ send_IPI_allbutself(CALL_FUNCTION_VECTOR);
++ else
++ send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
+
+ /* Wait for response */
+ while (atomic_read(&data.started) != cpus)
+@@ -532,15 +570,14 @@ int smp_call_function (void (*func) (voi
+
+ return 0;
+ }
+-EXPORT_SYMBOL(smp_call_function);
+
+ static void stop_this_cpu (void * dummy)
+ {
++ local_irq_disable();
+ /*
+ * Remove this CPU:
+ */
+ cpu_clear(smp_processor_id(), cpu_online_map);
+- local_irq_disable();
+ disable_all_local_evtchn();
+ if (cpu_data[smp_processor_id()].hlt_works_ok)
+ for(;;) halt();
+@@ -551,13 +588,18 @@ static void stop_this_cpu (void * dummy)
+ * this function calls the 'stop' function on all other CPUs in the system.
+ */
+
+-void smp_send_stop(void)
++void xen_smp_send_stop(void)
+ {
+- smp_call_function(stop_this_cpu, NULL, 1, 0);
++ /* Don't deadlock on the call lock in panic */
++ int nolock = !spin_trylock(&call_lock);
++ unsigned long flags;
+
+- local_irq_disable();
++ local_irq_save(flags);
++ __smp_call_function(stop_this_cpu, NULL, 0, 0);
++ if (!nolock)
++ spin_unlock(&call_lock);
+ disable_all_local_evtchn();
+- local_irq_enable();
++ local_irq_restore(flags);
+ }
+
+ /*
+@@ -598,74 +640,3 @@ irqreturn_t smp_call_function_interrupt(
+
+ return IRQ_HANDLED;
+ }
+-
+-/*
+- * this function sends a 'generic call function' IPI to one other CPU
+- * in the system.
+- *
+- * cpu is a standard Linux logical CPU number.
+- */
+-static void
+-__smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+- int nonatomic, int wait)
+-{
+- struct call_data_struct data;
+- int cpus = 1;
+-
+- data.func = func;
+- data.info = info;
+- atomic_set(&data.started, 0);
+- data.wait = wait;
+- if (wait)
+- atomic_set(&data.finished, 0);
+-
+- call_data = &data;
+- wmb();
+- /* Send a message to all other CPUs and wait for them to respond */
+- send_IPI_mask(cpumask_of_cpu(cpu), CALL_FUNCTION_VECTOR);
+-
+- /* Wait for response */
+- while (atomic_read(&data.started) != cpus)
+- cpu_relax();
+-
+- if (!wait)
+- return;
+-
+- while (atomic_read(&data.finished) != cpus)
+- cpu_relax();
+-}
+-
+-/*
+- * smp_call_function_single - Run a function on another CPU
+- * @func: The function to run. This must be fast and non-blocking.
+- * @info: An arbitrary pointer to pass to the function.
+- * @nonatomic: Currently unused.
+- * @wait: If true, wait until function has completed on other CPUs.
+- *
+- * Retrurns 0 on success, else a negative status code.
+- *
+- * Does not return until the remote CPU is nearly ready to execute <func>
+- * or is or has executed.
+- */
+-
+-int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+- int nonatomic, int wait)
+-{
+- /* prevent preemption and reschedule on another processor */
+- int me = get_cpu();
+- if (cpu == me) {
+- WARN_ON(1);
+- put_cpu();
+- return -EBUSY;
+- }
+-
+- /* Can deadlock when called with interrupts disabled */
+- WARN_ON(irqs_disabled());
+-
+- spin_lock_bh(&call_lock);
+- __smp_call_function_single(cpu, func, info, nonatomic, wait);
+- spin_unlock_bh(&call_lock);
+- put_cpu();
+- return 0;
+-}
+-EXPORT_SYMBOL(smp_call_function_single);
+--- a/arch/x86/kernel/smp_64-xen.c
++++ b/arch/x86/kernel/smp_64-xen.c
+@@ -14,7 +14,6 @@
+ #include <linux/mm.h>
+ #include <linux/delay.h>
+ #include <linux/spinlock.h>
+-#include <linux/smp_lock.h>
+ #include <linux/smp.h>
+ #include <linux/kernel_stat.h>
+ #include <linux/mc146818rtc.h>
+@@ -457,44 +456,36 @@ int smp_call_function (void (*func) (voi
+ }
+ EXPORT_SYMBOL(smp_call_function);
+
+-void smp_stop_cpu(void)
++static void stop_this_cpu(void *dummy)
+ {
+- unsigned long flags;
++ local_irq_disable();
+ /*
+ * Remove this CPU:
+ */
+ cpu_clear(smp_processor_id(), cpu_online_map);
+- local_irq_save(flags);
+ disable_all_local_evtchn();
+- local_irq_restore(flags);
+-}
+-
+-static void smp_really_stop_cpu(void *dummy)
+-{
+- smp_stop_cpu();
+ for (;;)
+ halt();
+ }
+
+ void smp_send_stop(void)
+ {
+- int nolock = 0;
++ int nolock;
++ unsigned long flags;
++
+ #ifndef CONFIG_XEN
+ if (reboot_force)
+ return;
+ #endif
++
+ /* Don't deadlock on the call lock in panic */
+- if (!spin_trylock(&call_lock)) {
+- /* ignore locking because we have panicked anyways */
+- nolock = 1;
+- }
+- __smp_call_function(smp_really_stop_cpu, NULL, 0, 0);
++ nolock = !spin_trylock(&call_lock);
++ local_irq_save(flags);
++ __smp_call_function(stop_this_cpu, NULL, 0, 0);
+ if (!nolock)
+ spin_unlock(&call_lock);
+-
+- local_irq_disable();
+ disable_all_local_evtchn();
+- local_irq_enable();
++ local_irq_restore(flags);
+ }
+
+ /*
+--- a/arch/x86/kernel/time_32-xen.c
++++ b/arch/x86/kernel/time_32-xen.c
+@@ -80,7 +80,6 @@
+ #include <asm/i8253.h>
+ DEFINE_SPINLOCK(i8253_lock);
+ EXPORT_SYMBOL(i8253_lock);
+-int pit_latch_buggy; /* extern */
+ #else
+ volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
+ #endif
+@@ -218,6 +217,26 @@ static inline u64 scale_delta(u64 delta,
+ return product;
+ }
+
++static inline u64 get64(volatile u64 *ptr)
++{
++#ifndef CONFIG_64BIT
++ return cmpxchg64(ptr, 0, 0);
++#else
++ return *ptr;
++#define cmpxchg64 cmpxchg
++#endif
++}
++
++static inline u64 get64_local(volatile u64 *ptr)
++{
++#ifndef CONFIG_64BIT
++ return cmpxchg64_local(ptr, 0, 0);
++#else
++ return *ptr;
++#define cmpxchg64_local cmpxchg_local
++#endif
++}
++
+ static void init_cpu_khz(void)
+ {
+ u64 __cpu_khz = 1000000ULL << 32;
+@@ -399,7 +418,7 @@ static int set_rtc_mmss(unsigned long no
+ return retval;
+ }
+
+-unsigned long long sched_clock(void)
++static unsigned long long local_clock(void)
+ {
+ unsigned int cpu = get_cpu();
+ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
+@@ -420,6 +439,61 @@ unsigned long long sched_clock(void)
+ return time;
+ }
+
++/*
++ * Runstate accounting
++ */
++static void get_runstate_snapshot(struct vcpu_runstate_info *res)
++{
++ u64 state_time;
++ struct vcpu_runstate_info *state;
++
++ BUG_ON(preemptible());
++
++ state = &__get_cpu_var(runstate);
++
++ do {
++ state_time = get64_local(&state->state_entry_time);
++ *res = *state;
++ } while (get64_local(&state->state_entry_time) != state_time);
++
++ WARN_ON_ONCE(res->state != RUNSTATE_running);
++}
++
++/*
++ * Xen sched_clock implementation. Returns the number of unstolen
++ * nanoseconds, which is nanoseconds the VCPU spent in RUNNING+BLOCKED
++ * states.
++ */
++unsigned long long sched_clock(void)
++{
++ struct vcpu_runstate_info runstate;
++ cycle_t now;
++ u64 ret;
++ s64 offset;
++
++ /*
++ * Ideally sched_clock should be called on a per-cpu basis
++ * anyway, so preempt should already be disabled, but that's
++ * not current practice at the moment.
++ */
++ preempt_disable();
++
++ now = local_clock();
++
++ get_runstate_snapshot(&runstate);
++
++ offset = now - runstate.state_entry_time;
++ if (offset < 0)
++ offset = 0;
++
++ ret = offset + runstate.time[RUNSTATE_running]
++ + runstate.time[RUNSTATE_blocked];
++
++ preempt_enable();
++
++ return ret;
++}
++
+ unsigned long profile_pc(struct pt_regs *regs)
+ {
+ unsigned long pc = instruction_pointer(regs);
+@@ -467,10 +541,9 @@ EXPORT_SYMBOL(profile_pc);
+ irqreturn_t timer_interrupt(int irq, void *dev_id)
+ {
+ s64 delta, delta_cpu, stolen, blocked;
+- u64 sched_time;
+ unsigned int i, cpu = smp_processor_id();
+ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
+- struct vcpu_runstate_info *runstate = &per_cpu(runstate, cpu);
++ struct vcpu_runstate_info runstate;
+
+ /*
+ * Here we are in the timer irq handler. We just have irqs locally
+@@ -490,20 +563,7 @@ irqreturn_t timer_interrupt(int irq, voi
+ delta -= processed_system_time;
+ delta_cpu -= per_cpu(processed_system_time, cpu);
+
+- /*
+- * Obtain a consistent snapshot of stolen/blocked cycles. We
+- * can use state_entry_time to detect if we get preempted here.
+- */
+- do {
+- sched_time = runstate->state_entry_time;
+- barrier();
+- stolen = runstate->time[RUNSTATE_runnable] +
+- runstate->time[RUNSTATE_offline] -
+- per_cpu(processed_stolen_time, cpu);
+- blocked = runstate->time[RUNSTATE_blocked] -
+- per_cpu(processed_blocked_time, cpu);
+- barrier();
+- } while (sched_time != runstate->state_entry_time);
++ get_runstate_snapshot(&runstate);
+ } while (!time_values_up_to_date(cpu));
+
+ if ((unlikely(delta < -(s64)permitted_clock_jitter) ||
+@@ -545,6 +605,9 @@ irqreturn_t timer_interrupt(int irq, voi
+ * HACK: Passing NULL to account_steal_time()
+ * ensures that the ticks are accounted as stolen.
+ */
++ stolen = runstate.time[RUNSTATE_runnable]
++ + runstate.time[RUNSTATE_offline]
++ - per_cpu(processed_stolen_time, cpu);
+ if ((stolen > 0) && (delta_cpu > 0)) {
+ delta_cpu -= stolen;
+ if (unlikely(delta_cpu < 0))
+@@ -560,6 +623,8 @@ irqreturn_t timer_interrupt(int irq, voi
+ * HACK: Passing idle_task to account_steal_time()
+ * ensures that the ticks are accounted as idle/wait.
+ */
++ blocked = runstate.time[RUNSTATE_blocked]
++ - per_cpu(processed_blocked_time, cpu);
+ if ((blocked > 0) && (delta_cpu > 0)) {
+ delta_cpu -= blocked;
+ if (unlikely(delta_cpu < 0))
+@@ -596,7 +661,7 @@ irqreturn_t timer_interrupt(int irq, voi
+ return IRQ_HANDLED;
+ }
+
+-void mark_tsc_unstable(void)
++void mark_tsc_unstable(char *reason)
+ {
+ #ifndef CONFIG_XEN /* XXX Should tell the hypervisor about this fact. */
+ tsc_unstable = 1;
+@@ -604,17 +669,13 @@ void mark_tsc_unstable(void)
+ }
+ EXPORT_SYMBOL_GPL(mark_tsc_unstable);
+
++static cycle_t cs_last;
++
+ static cycle_t xen_clocksource_read(void)
+ {
+ #ifdef CONFIG_SMP
+- static cycle_t last_ret;
+-#ifndef CONFIG_64BIT
+- cycle_t last = cmpxchg64(&last_ret, 0, 0);
+-#else
+- cycle_t last = last_ret;
+-#define cmpxchg64 cmpxchg
+-#endif
+- cycle_t ret = sched_clock();
++ cycle_t last = get64(&cs_last);
++ cycle_t ret = local_clock();
+
+ if (unlikely((s64)(ret - last) < 0)) {
+ if (last - ret > permitted_clock_jitter
+@@ -633,17 +694,25 @@ static cycle_t xen_clocksource_read(void
+ }
+
+ for (;;) {
+- cycle_t cur = cmpxchg64(&last_ret, last, ret);
++ cycle_t cur = cmpxchg64(&cs_last, last, ret);
+
+ if (cur == last || (s64)(ret - cur) < 0)
+ return ret;
+ last = cur;
+ }
+ #else
+- return sched_clock();
++ return local_clock();
+ #endif
+ }
+
++static void xen_clocksource_resume(void)
++{
++ extern void time_resume(void);
++
++ time_resume();
++ cs_last = local_clock();
++}
++
+ static struct clocksource clocksource_xen = {
+ .name = "xen",
+ .rating = 400,
+@@ -652,6 +721,7 @@ static struct clocksource clocksource_xe
+ .mult = 1 << XEN_SHIFT, /* time directly in nanoseconds */
+ .shift = XEN_SHIFT,
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
++ .resume = xen_clocksource_resume,
+ };
+
+ static void init_missing_ticks_accounting(unsigned int cpu)
+@@ -740,35 +810,6 @@ void notify_arch_cmos_timer(void)
+ mod_timer(&sync_xen_wallclock_timer, jiffies + 1);
+ }
+
+-static int timer_resume(struct sys_device *dev)
+-{
+- extern void time_resume(void);
+- time_resume();
+- return 0;
+-}
+-
+-static struct sysdev_class timer_sysclass = {
+- .resume = timer_resume,
+- set_kset_name("timer"),
+-};
+-
+-
+-/* XXX this driverfs stuff should probably go elsewhere later -john */
+-static struct sys_device device_timer = {
+- .id = 0,
+- .cls = &timer_sysclass,
+-};
+-
+-static int time_init_device(void)
+-{
+- int error = sysdev_class_register(&timer_sysclass);
+- if (!error)
+- error = sysdev_register(&device_timer);
+- return error;
+-}
+-
+-device_initcall(time_init_device);
+-
+ extern void (*late_time_init)(void);
+
+ /* Dynamically-mapped IRQ. */
+@@ -899,21 +940,21 @@ static void start_hz_timer(void)
+ cpu_clear(smp_processor_id(), nohz_cpu_mask);
+ }
+
+-void raw_safe_halt(void)
++void xen_safe_halt(void)
+ {
+ stop_hz_timer();
+ /* Blocking includes an implicit local_irq_enable(). */
+ HYPERVISOR_block();
+ start_hz_timer();
+ }
+-EXPORT_SYMBOL(raw_safe_halt);
++EXPORT_SYMBOL(xen_safe_halt);
+
+-void halt(void)
++void xen_halt(void)
+ {
+ if (irqs_disabled())
+ VOID(HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL));
+ }
+-EXPORT_SYMBOL(halt);
++EXPORT_SYMBOL(xen_halt);
+
+ /* No locking required. Interrupts are disabled on all CPUs. */
+ void time_resume(void)
+--- a/arch/x86/kernel/traps_32-xen.c
++++ b/arch/x86/kernel/traps_32-xen.c
+@@ -52,7 +52,7 @@
+ #include <asm/unwind.h>
+ #include <asm/smp.h>
+ #include <asm/arch_hooks.h>
+-#include <asm/kdebug.h>
++#include <linux/kdebug.h>
+ #include <asm/stacktrace.h>
+
+ #include <linux/module.h>
+@@ -101,20 +101,6 @@ asmlinkage void machine_check(void);
+
+ int kstack_depth_to_print = 24;
+ static unsigned int code_bytes = 64;
+-ATOMIC_NOTIFIER_HEAD(i386die_chain);
+-
+-int register_die_notifier(struct notifier_block *nb)
+-{
+- vmalloc_sync_all();
+- return atomic_notifier_chain_register(&i386die_chain, nb);
+-}
+-EXPORT_SYMBOL(register_die_notifier); /* used modular by kdb */
+-
+-int unregister_die_notifier(struct notifier_block *nb)
+-{
+- return atomic_notifier_chain_unregister(&i386die_chain, nb);
+-}
+-EXPORT_SYMBOL(unregister_die_notifier); /* used modular by kdb */
+
+ static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
+ {
+@@ -325,7 +311,7 @@ void show_registers(struct pt_regs *regs
+ regs->xds & 0xffff, regs->xes & 0xffff, regs->xfs & 0xffff, gs, ss);
+ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+ TASK_COMM_LEN, current->comm, current->pid,
+- current_thread_info(), current, current->thread_info);
++ current_thread_info(), current, task_thread_info(current));
+ /*
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+@@ -482,8 +468,6 @@ static void __kprobes do_trap(int trapnr
+ siginfo_t *info)
+ {
+ struct task_struct *tsk = current;
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = trapnr;
+
+ if (regs->eflags & VM_MASK) {
+ if (vm86)
+@@ -495,6 +479,18 @@ static void __kprobes do_trap(int trapnr
+ goto kernel_trap;
+
+ trap_signal: {
++ /*
++ * We want error_code and trap_no set for userspace faults and
++ * kernelspace faults which result in die(), but not
++ * kernelspace faults which are fixed up. die() gives the
++ * process no chance to handle the signal and notice the
++ * kernel fault information, so that won't result in polluting
++ * the information about previously queued, but not yet
++ * delivered, faults. See also do_general_protection below.
++ */
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
++
+ if (info)
+ force_sig_info(signr, info, tsk);
+ else
+@@ -503,8 +499,11 @@ static void __kprobes do_trap(int trapnr
+ }
+
+ kernel_trap: {
+- if (!fixup_exception(regs))
++ if (!fixup_exception(regs)) {
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
+ die(str, regs, error_code);
++ }
+ return;
+ }
+
+@@ -578,9 +577,6 @@ DO_ERROR_INFO(32, SIGSEGV, "iret excepti
+ fastcall void __kprobes do_general_protection(struct pt_regs * regs,
+ long error_code)
+ {
+- current->thread.error_code = error_code;
+- current->thread.trap_no = 13;
+-
+ if (regs->eflags & VM_MASK)
+ goto gp_in_vm86;
+
+@@ -599,6 +595,8 @@ gp_in_vm86:
+
+ gp_in_kernel:
+ if (!fixup_exception(regs)) {
++ current->thread.error_code = error_code;
++ current->thread.trap_no = 13;
+ if (notify_die(DIE_GPF, "general protection fault", regs,
+ error_code, 13, SIGSEGV) == NOTIFY_STOP)
+ return;
+@@ -987,9 +985,7 @@ fastcall void do_spurious_interrupt_bug(
+ fastcall unsigned long patch_espfix_desc(unsigned long uesp,
+ unsigned long kesp)
+ {
+- int cpu = smp_processor_id();
+- struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
+- struct desc_struct *gdt = (struct desc_struct *)cpu_gdt_descr->address;
++ struct desc_struct *gdt = __get_cpu_var(gdt_page).gdt;
+ unsigned long base = (kesp - uesp) & -THREAD_SIZE;
+ unsigned long new_kesp = kesp - base;
+ unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT;
+--- a/arch/x86/kernel/traps_64-xen.c
++++ b/arch/x86/kernel/traps_64-xen.c
+@@ -32,6 +32,7 @@
+ #include <linux/unwind.h>
+ #include <linux/uaccess.h>
+ #include <linux/bug.h>
++#include <linux/kdebug.h>
+
+ #include <asm/system.h>
+ #include <asm/io.h>
+@@ -39,7 +40,6 @@
+ #include <asm/debugreg.h>
+ #include <asm/desc.h>
+ #include <asm/i387.h>
+-#include <asm/kdebug.h>
+ #include <asm/processor.h>
+ #include <asm/unwind.h>
+ #include <asm/smp.h>
+@@ -71,22 +71,6 @@ asmlinkage void alignment_check(void);
+ asmlinkage void machine_check(void);
+ asmlinkage void spurious_interrupt_bug(void);
+
+-ATOMIC_NOTIFIER_HEAD(die_chain);
+-EXPORT_SYMBOL(die_chain);
+-
+-int register_die_notifier(struct notifier_block *nb)
+-{
+- vmalloc_sync_all();
+- return atomic_notifier_chain_register(&die_chain, nb);
+-}
+-EXPORT_SYMBOL(register_die_notifier); /* used modular by kdb */
+-
+-int unregister_die_notifier(struct notifier_block *nb)
+-{
+- return atomic_notifier_chain_unregister(&die_chain, nb);
+-}
+-EXPORT_SYMBOL(unregister_die_notifier); /* used modular by kdb */
+-
+ static inline void conditional_sti(struct pt_regs *regs)
+ {
+ if (regs->eflags & X86_EFLAGS_IF)
+@@ -428,8 +412,7 @@ void show_registers(struct pt_regs *regs
+ const int cpu = smp_processor_id();
+ struct task_struct *cur = cpu_pda(cpu)->pcurrent;
+
+- rsp = regs->rsp;
+-
++ rsp = regs->rsp;
+ printk("CPU %d ", cpu);
+ __show_regs(regs);
+ printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
+@@ -440,7 +423,6 @@ void show_registers(struct pt_regs *regs
+ * time of the fault..
+ */
+ if (in_kernel) {
+-
+ printk("Stack: ");
+ _show_stack(NULL, regs, (unsigned long*)rsp);
+
+@@ -485,13 +467,14 @@ static unsigned int die_nest_count;
+
+ unsigned __kprobes long oops_begin(void)
+ {
+- int cpu = smp_processor_id();
++ int cpu;
+ unsigned long flags;
+
+ oops_enter();
+
+ /* racy, but better than risking deadlock. */
+ local_irq_save(flags);
++ cpu = smp_processor_id();
+ if (!spin_trylock(&die_lock)) {
+ if (cpu == die_owner)
+ /* nested oops. should stop eventually */;
+@@ -585,10 +568,20 @@ static void __kprobes do_trap(int trapnr
+ {
+ struct task_struct *tsk = current;
+
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = trapnr;
+-
+ if (user_mode(regs)) {
++ /*
++ * We want error_code and trap_no set for userspace
++ * faults and kernelspace faults which result in
++ * die(), but not kernelspace faults which are fixed
++ * up. die() gives the process no chance to handle
++ * the signal and notice the kernel fault information,
++ * so that won't result in polluting the information
++ * about previously queued, but not yet delivered,
++ * faults. See also do_general_protection below.
++ */
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
++
+ if (exception_trace && unhandled_signal(tsk, signr))
+ printk(KERN_INFO
+ "%s[%d] trap %s rip:%lx rsp:%lx error:%lx\n",
+@@ -609,8 +602,11 @@ static void __kprobes do_trap(int trapnr
+ fixup = search_exception_tables(regs->rip);
+ if (fixup)
+ regs->rip = fixup->fixup;
+- else
++ else {
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
+ die(str, regs, error_code);
++ }
+ return;
+ }
+ }
+@@ -686,10 +682,10 @@ asmlinkage void __kprobes do_general_pro
+
+ conditional_sti(regs);
+
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = 13;
+-
+ if (user_mode(regs)) {
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 13;
++
+ if (exception_trace && unhandled_signal(tsk, SIGSEGV))
+ printk(KERN_INFO
+ "%s[%d] general protection rip:%lx rsp:%lx error:%lx\n",
+@@ -708,6 +704,9 @@ asmlinkage void __kprobes do_general_pro
+ regs->rip = fixup->fixup;
+ return;
+ }
++
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 13;
+ if (notify_die(DIE_GPF, "general protection fault", regs,
+ error_code, 13, SIGSEGV) == NOTIFY_STOP)
+ return;
+--- a/arch/x86/kernel/vsyscall_64-xen.c
++++ b/arch/x86/kernel/vsyscall_64-xen.c
+@@ -45,14 +45,34 @@
+
+ #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
+ #define __syscall_clobber "r11","rcx","memory"
++#define __pa_vsymbol(x) \
++ ({unsigned long v; \
++ extern char __vsyscall_0; \
++ asm("" : "=r" (v) : "0" (x)); \
++ ((v - VSYSCALL_FIRST_PAGE) + __pa_symbol(&__vsyscall_0)); })
+
++/*
++ * vsyscall_gtod_data contains data that is :
++ * - readonly from vsyscalls
++ * - writen by timer interrupt or systcl (/proc/sys/kernel/vsyscall64)
++ * Try to keep this structure as small as possible to avoid cache line ping pongs
++ */
+ struct vsyscall_gtod_data_t {
+- seqlock_t lock;
+- int sysctl_enabled;
+- struct timeval wall_time_tv;
++ seqlock_t lock;
++
++ /* open coded 'struct timespec' */
++ time_t wall_time_sec;
++ u32 wall_time_nsec;
++
++ int sysctl_enabled;
+ struct timezone sys_tz;
+- cycle_t offset_base;
+- struct clocksource clock;
++ struct { /* extract of a clocksource struct */
++ cycle_t (*vread)(void);
++ cycle_t cycle_last;
++ cycle_t mask;
++ u32 mult;
++ u32 shift;
++ } clock;
+ };
+ int __vgetcpu_mode __section_vgetcpu_mode;
+
+@@ -68,9 +88,13 @@ void update_vsyscall(struct timespec *wa
+
+ write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
+ /* copy vsyscall data */
+- vsyscall_gtod_data.clock = *clock;
+- vsyscall_gtod_data.wall_time_tv.tv_sec = wall_time->tv_sec;
+- vsyscall_gtod_data.wall_time_tv.tv_usec = wall_time->tv_nsec/1000;
++ vsyscall_gtod_data.clock.vread = clock->vread;
++ vsyscall_gtod_data.clock.cycle_last = clock->cycle_last;
++ vsyscall_gtod_data.clock.mask = clock->mask;
++ vsyscall_gtod_data.clock.mult = clock->mult;
++ vsyscall_gtod_data.clock.shift = clock->shift;
++ vsyscall_gtod_data.wall_time_sec = wall_time->tv_sec;
++ vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
+ vsyscall_gtod_data.sys_tz = sys_tz;
+ write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
+ }
+@@ -105,7 +129,8 @@ static __always_inline long time_syscall
+ static __always_inline void do_vgettimeofday(struct timeval * tv)
+ {
+ cycle_t now, base, mask, cycle_delta;
+- unsigned long seq, mult, shift, nsec_delta;
++ unsigned seq;
++ unsigned long mult, shift, nsec;
+ cycle_t (*vread)(void);
+ do {
+ seq = read_seqbegin(&__vsyscall_gtod_data.lock);
+@@ -121,21 +146,20 @@ static __always_inline void do_vgettimeo
+ mult = __vsyscall_gtod_data.clock.mult;
+ shift = __vsyscall_gtod_data.clock.shift;
+
+- *tv = __vsyscall_gtod_data.wall_time_tv;
+-
++ tv->tv_sec = __vsyscall_gtod_data.wall_time_sec;
++ nsec = __vsyscall_gtod_data.wall_time_nsec;
+ } while (read_seqretry(&__vsyscall_gtod_data.lock, seq));
+
+ /* calculate interval: */
+ cycle_delta = (now - base) & mask;
+ /* convert to nsecs: */
+- nsec_delta = (cycle_delta * mult) >> shift;
++ nsec += (cycle_delta * mult) >> shift;
+
+- /* convert to usecs and add to timespec: */
+- tv->tv_usec += nsec_delta / NSEC_PER_USEC;
+- while (tv->tv_usec > USEC_PER_SEC) {
++ while (nsec >= NSEC_PER_SEC) {
+ tv->tv_sec += 1;
+- tv->tv_usec -= USEC_PER_SEC;
++ nsec -= NSEC_PER_SEC;
+ }
++ tv->tv_usec = nsec / NSEC_PER_USEC;
+ }
+
+ int __vsyscall(0) vgettimeofday(struct timeval * tv, struct timezone * tz)
+@@ -151,11 +175,16 @@ int __vsyscall(0) vgettimeofday(struct t
+ * unlikely */
+ time_t __vsyscall(1) vtime(time_t *t)
+ {
++ struct timeval tv;
++ time_t result;
+ if (unlikely(!__vsyscall_gtod_data.sysctl_enabled))
+ return time_syscall(t);
+- else if (t)
+- *t = __vsyscall_gtod_data.wall_time_tv.tv_sec;
+- return __vsyscall_gtod_data.wall_time_tv.tv_sec;
++
++ vgettimeofday(&tv, 0);
++ result = tv.tv_sec;
++ if (t)
++ *t = result;
++ return result;
+ }
+
+ /* Fast way to get current CPU and node.
+@@ -224,10 +253,10 @@ static int vsyscall_sysctl_change(ctl_ta
+ return ret;
+ /* gcc has some trouble with __va(__pa()), so just do it this
+ way. */
+- map1 = ioremap(__pa_symbol(&vsysc1), 2);
++ map1 = ioremap(__pa_vsymbol(&vsysc1), 2);
+ if (!map1)
+ return -ENOMEM;
+- map2 = ioremap(__pa_symbol(&vsysc2), 2);
++ map2 = ioremap(__pa_vsymbol(&vsysc2), 2);
+ if (!map2) {
+ ret = -ENOMEM;
+ goto out;
+@@ -304,7 +333,7 @@ static int __cpuinit
+ cpu_vsyscall_notifier(struct notifier_block *n, unsigned long action, void *arg)
+ {
+ long cpu = (long)arg;
+- if (action == CPU_ONLINE)
++ if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN)
+ smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 0, 1);
+ return NOTIFY_DONE;
+ }
+--- a/arch/x86/mm/fault_32-xen.c
++++ b/arch/x86/mm/fault_32-xen.c
+@@ -14,19 +14,20 @@
+ #include <linux/mman.h>
+ #include <linux/mm.h>
+ #include <linux/smp.h>
+-#include <linux/smp_lock.h>
+ #include <linux/interrupt.h>
+ #include <linux/init.h>
+ #include <linux/tty.h>
+ #include <linux/vt_kern.h> /* For unblank_screen() */
+ #include <linux/highmem.h>
++#include <linux/bootmem.h> /* for max_low_pfn */
++#include <linux/vmalloc.h>
+ #include <linux/module.h>
+ #include <linux/kprobes.h>
+ #include <linux/uaccess.h>
++#include <linux/kdebug.h>
+
+ #include <asm/system.h>
+ #include <asm/desc.h>
+-#include <asm/kdebug.h>
+ #include <asm/segment.h>
+
+ extern void die(const char *,struct pt_regs *,long);
+@@ -259,25 +260,20 @@ static void dump_fault_path(unsigned lon
+ unsigned long page;
+
+ page = read_cr3();
+- page = ((unsigned long *) __va(page))[address >> 22];
+- if (oops_may_print())
+- printk(KERN_ALERT "*pde = ma %08lx pa %08lx\n", page,
+- machine_to_phys(page));
++ page = ((unsigned long *) __va(page))[address >> PGDIR_SHIFT];
++ printk(KERN_ALERT "*pde = ma %08lx pa %08lx\n", page,
++ machine_to_phys(page));
+ /*
+ * We must not directly access the pte in the highpte
+ * case if the page table is located in highmem.
+ * And lets rather not kmap-atomic the pte, just in case
+ * it's allocated already.
+ */
+-#ifdef CONFIG_HIGHPTE
+- if ((page >> PAGE_SHIFT) >= highstart_pfn)
+- return;
+-#endif
+- if ((page & 1) && oops_may_print()) {
+- page &= PAGE_MASK;
+- address &= 0x003ff000;
+- page = machine_to_phys(page);
+- page = ((unsigned long *) __va(page))[address >> PAGE_SHIFT];
++ if ((machine_to_phys(page) >> PAGE_SHIFT) < max_low_pfn
++ && (page & _PAGE_PRESENT)) {
++ page = machine_to_phys(page & PAGE_MASK);
++ page = ((unsigned long *) __va(page))[(address >> PAGE_SHIFT)
++ & (PTRS_PER_PTE - 1)];
+ printk(KERN_ALERT "*pte = ma %08lx pa %08lx\n", page,
+ machine_to_phys(page));
+ }
+@@ -581,6 +577,11 @@ bad_area:
+ bad_area_nosemaphore:
+ /* User mode accesses just cause a SIGSEGV */
+ if (error_code & 4) {
++ /*
++ * It's possible to have interrupts off here.
++ */
++ local_irq_enable();
++
+ /*
+ * Valid to do another page fault here because this one came
+ * from user space.
+@@ -633,7 +634,7 @@ no_context:
+ bust_spinlocks(1);
+
+ if (oops_may_print()) {
+- #ifdef CONFIG_X86_PAE
++#ifdef CONFIG_X86_PAE
+ if (error_code & 16) {
+ pte_t *pte = lookup_address(address);
+
+@@ -642,7 +643,7 @@ no_context:
+ "NX-protected page - exploit attempt? "
+ "(uid: %d)\n", current->uid);
+ }
+- #endif
++#endif
+ if (address < PAGE_SIZE)
+ printk(KERN_ALERT "BUG: unable to handle kernel NULL "
+ "pointer dereference");
+@@ -652,8 +653,8 @@ no_context:
+ printk(" at virtual address %08lx\n",address);
+ printk(KERN_ALERT " printing eip:\n");
+ printk("%08lx\n", regs->eip);
++ dump_fault_path(address);
+ }
+- dump_fault_path(address);
+ tsk->thread.cr2 = address;
+ tsk->thread.trap_no = 14;
+ tsk->thread.error_code = error_code;
+@@ -694,7 +695,6 @@ do_sigbus:
+ force_sig_info_fault(SIGBUS, BUS_ADRERR, address, tsk);
+ }
+
+-#if !HAVE_SHARED_KERNEL_PMD
+ void vmalloc_sync_all(void)
+ {
+ /*
+@@ -710,6 +710,9 @@ void vmalloc_sync_all(void)
+ static unsigned long start = TASK_SIZE;
+ unsigned long address;
+
++ if (SHARED_KERNEL_PMD)
++ return;
++
+ BUILD_BUG_ON(TASK_SIZE & ~PGDIR_MASK);
+ for (address = start;
+ address >= TASK_SIZE && address < hypervisor_virt_start;
+@@ -739,4 +742,3 @@ void vmalloc_sync_all(void)
+ start = address + (1UL << PMD_SHIFT);
+ }
+ }
+-#endif
+--- a/arch/x86/mm/fault_64-xen.c
++++ b/arch/x86/mm/fault_64-xen.c
+@@ -15,22 +15,22 @@
+ #include <linux/mman.h>
+ #include <linux/mm.h>
+ #include <linux/smp.h>
+-#include <linux/smp_lock.h>
+ #include <linux/interrupt.h>
+ #include <linux/init.h>
+ #include <linux/tty.h>
+ #include <linux/vt_kern.h> /* For unblank_screen() */
+ #include <linux/compiler.h>
++#include <linux/vmalloc.h>
+ #include <linux/module.h>
+ #include <linux/kprobes.h>
+ #include <linux/uaccess.h>
++#include <linux/kdebug.h>
+
+ #include <asm/system.h>
+ #include <asm/pgalloc.h>
+ #include <asm/smp.h>
+ #include <asm/tlbflush.h>
+ #include <asm/proto.h>
+-#include <asm/kdebug.h>
+ #include <asm-generic/sections.h>
+
+ /* Page fault error code bits */
+@@ -537,6 +537,12 @@ bad_area:
+ bad_area_nosemaphore:
+ /* User mode accesses just cause a SIGSEGV */
+ if (error_code & PF_USER) {
++
++ /*
++ * It's possible to have interrupts off here.
++ */
++ local_irq_enable();
++
+ if (is_prefetch(regs, address, error_code))
+ return;
+
+@@ -646,7 +652,7 @@ do_sigbus:
+ }
+
+ DEFINE_SPINLOCK(pgd_lock);
+-struct page *pgd_list;
++LIST_HEAD(pgd_list);
+
+ void vmalloc_sync_all(void)
+ {
+@@ -666,8 +672,7 @@ void vmalloc_sync_all(void)
+ if (pgd_none(*pgd_ref))
+ continue;
+ spin_lock(&pgd_lock);
+- for (page = pgd_list; page;
+- page = (struct page *)page->index) {
++ list_for_each_entry(page, &pgd_list, lru) {
+ pgd_t *pgd;
+ pgd = (pgd_t *)page_address(page) + pgd_index(address);
+ if (pgd_none(*pgd))
+--- a/arch/x86/mm/highmem_32-xen.c
++++ b/arch/x86/mm/highmem_32-xen.c
+@@ -26,7 +26,7 @@ void kunmap(struct page *page)
+ * However when holding an atomic kmap is is not legal to sleep, so atomic
+ * kmaps are appropriate for short, tight code paths only.
+ */
+-static void *__kmap_atomic(struct page *page, enum km_type type, pgprot_t prot)
++void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot)
+ {
+ enum fixed_addresses idx;
+ unsigned long vaddr;
+@@ -49,15 +49,7 @@ static void *__kmap_atomic(struct page *
+
+ void *kmap_atomic(struct page *page, enum km_type type)
+ {
+- return __kmap_atomic(page, type, kmap_prot);
+-}
+-
+-/* Same as kmap_atomic but with PAGE_KERNEL_RO page protection. */
+-void *kmap_atomic_pte(struct page *page, enum km_type type)
+-{
+- return __kmap_atomic(page, type,
+- test_bit(PG_pinned, &page->flags)
+- ? PAGE_KERNEL_RO : kmap_prot);
++ return kmap_atomic_prot(page, type, kmap_prot);
+ }
+
+ void kunmap_atomic(void *kvaddr, enum km_type type)
+@@ -80,6 +72,7 @@ void kunmap_atomic(void *kvaddr, enum km
+ #endif
+ }
+
++ /*arch_flush_lazy_mmu_mode();*/
+ pagefault_enable();
+ }
+
+@@ -162,7 +155,6 @@ void copy_highpage(struct page *to, stru
+ EXPORT_SYMBOL(kmap);
+ EXPORT_SYMBOL(kunmap);
+ EXPORT_SYMBOL(kmap_atomic);
+-EXPORT_SYMBOL(kmap_atomic_pte);
+ EXPORT_SYMBOL(kunmap_atomic);
+ EXPORT_SYMBOL(kmap_atomic_to_page);
+ EXPORT_SYMBOL(clear_highpage);
+--- a/arch/x86/mm/init_32-xen.c
++++ b/arch/x86/mm/init_32-xen.c
+@@ -22,6 +22,7 @@
+ #include <linux/init.h>
+ #include <linux/highmem.h>
+ #include <linux/pagemap.h>
++#include <linux/pfn.h>
+ #include <linux/poison.h>
+ #include <linux/bootmem.h>
+ #include <linux/slab.h>
+@@ -65,17 +66,19 @@ static pmd_t * __init one_md_table_init(
+ pmd_t *pmd_table;
+
+ #ifdef CONFIG_X86_PAE
+- pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+- paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
+- make_lowmem_page_readonly(pmd_table, XENFEAT_writable_page_tables);
+- set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
+- pud = pud_offset(pgd, 0);
+- if (pmd_table != pmd_offset(pud, 0))
+- BUG();
+-#else
++ if (!(__pgd_val(*pgd) & _PAGE_PRESENT)) {
++ pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
++
++ paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
++ make_lowmem_page_readonly(pmd_table, XENFEAT_writable_page_tables);
++ set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
++ pud = pud_offset(pgd, 0);
++ if (pmd_table != pmd_offset(pud, 0))
++ BUG();
++ }
++#endif
+ pud = pud_offset(pgd, 0);
+ pmd_table = pmd_offset(pud, 0);
+-#endif
+
+ return pmd_table;
+ }
+@@ -86,16 +89,18 @@ static pmd_t * __init one_md_table_init(
+ */
+ static pte_t * __init one_page_table_init(pmd_t *pmd)
+ {
++#if CONFIG_XEN_COMPAT <= 0x030002
+ if (pmd_none(*pmd)) {
++#else
++ if (!(__pmd_val(*pmd) & _PAGE_PRESENT)) {
++#endif
+ pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
++
+ paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(page_table,
+ XENFEAT_writable_page_tables);
+ set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
+- if (page_table != pte_offset_kernel(pmd, 0))
+- BUG();
+-
+- return page_table;
++ BUG_ON(page_table != pte_offset_kernel(pmd, 0));
+ }
+
+ return pte_offset_kernel(pmd, 0);
+@@ -115,7 +120,6 @@ static pte_t * __init one_page_table_ini
+ static void __init page_table_range_init (unsigned long start, unsigned long end, pgd_t *pgd_base)
+ {
+ pgd_t *pgd;
+- pud_t *pud;
+ pmd_t *pmd;
+ int pgd_idx, pmd_idx;
+ unsigned long vaddr;
+@@ -126,12 +130,10 @@ static void __init page_table_range_init
+ pgd = pgd_base + pgd_idx;
+
+ for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd++, pgd_idx++) {
+- if (pgd_none(*pgd))
+- one_md_table_init(pgd);
+- pud = pud_offset(pgd, vaddr);
+- pmd = pmd_offset(pud, vaddr);
++ pmd = one_md_table_init(pgd);
++ pmd = pmd + pmd_index(vaddr);
+ for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end); pmd++, pmd_idx++) {
+- if (vaddr < hypervisor_virt_start && pmd_none(*pmd))
++ if (vaddr < hypervisor_virt_start)
+ one_page_table_init(pmd);
+
+ vaddr += PMD_SIZE;
+@@ -194,24 +196,25 @@ static void __init kernel_physical_mappi
+ /* Map with big pages if possible, otherwise create normal page tables. */
+ if (cpu_has_pse) {
+ unsigned int address2 = (pfn + PTRS_PER_PTE - 1) * PAGE_SIZE + PAGE_OFFSET + PAGE_SIZE-1;
+-
+ if (is_kernel_text(address) || is_kernel_text(address2))
+ set_pmd(pmd, pfn_pmd(pfn, PAGE_KERNEL_LARGE_EXEC));
+ else
+ set_pmd(pmd, pfn_pmd(pfn, PAGE_KERNEL_LARGE));
++
+ pfn += PTRS_PER_PTE;
+ } else {
+ pte = one_page_table_init(pmd);
+
+- pte += pte_ofs;
+- for (; pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn; pte++, pfn++, pte_ofs++) {
+- /* XEN: Only map initial RAM allocation. */
+- if ((pfn >= max_ram_pfn) || pte_present(*pte))
+- continue;
+- if (is_kernel_text(address))
+- set_pte(pte, pfn_pte(pfn, PAGE_KERNEL_EXEC));
+- else
+- set_pte(pte, pfn_pte(pfn, PAGE_KERNEL));
++ for (pte += pte_ofs;
++ pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn;
++ pte++, pfn++, pte_ofs++, address += PAGE_SIZE) {
++ /* XEN: Only map initial RAM allocation. */
++ if ((pfn >= max_ram_pfn) || pte_present(*pte))
++ continue;
++ if (is_kernel_text(address))
++ set_pte(pte, pfn_pte(pfn, PAGE_KERNEL_EXEC));
++ else
++ set_pte(pte, pfn_pte(pfn, PAGE_KERNEL));
+ }
+ pte_ofs = 0;
+ }
+@@ -381,15 +384,44 @@ extern void __init remap_numa_kva(void);
+
+ pgd_t *swapper_pg_dir;
+
++static void __init xen_pagetable_setup_start(pgd_t *base)
++{
++}
++
++static void __init xen_pagetable_setup_done(pgd_t *base)
++{
++}
++
++/*
++ * Build a proper pagetable for the kernel mappings. Up until this
++ * point, we've been running on some set of pagetables constructed by
++ * the boot process.
++ *
++ * If we're booting on native hardware, this will be a pagetable
++ * constructed in arch/i386/kernel/head.S, and not running in PAE mode
++ * (even if we'll end up running in PAE). The root of the pagetable
++ * will be swapper_pg_dir.
++ *
++ * If we're booting paravirtualized under a hypervisor, then there are
++ * more options: we may already be running PAE, and the pagetable may
++ * or may not be based in swapper_pg_dir. In any case,
++ * paravirt_pagetable_setup_start() will set up swapper_pg_dir
++ * appropriately for the rest of the initialization to work.
++ *
++ * In general, pagetable_init() assumes that the pagetable may already
++ * be partially populated, and so it avoids stomping on any existing
++ * mappings.
++ */
+ static void __init pagetable_init (void)
+ {
+- unsigned long vaddr;
++ unsigned long vaddr, end;
+ pgd_t *pgd_base = (pgd_t *)xen_start_info->pt_base;
+
++ xen_pagetable_setup_start(pgd_base);
++
+ /* Enable PSE if available */
+- if (cpu_has_pse) {
++ if (cpu_has_pse)
+ set_in_cr4(X86_CR4_PSE);
+- }
+
+ /* Enable PGE if available */
+ if (cpu_has_pge) {
+@@ -406,9 +438,12 @@ static void __init pagetable_init (void)
+ * created - mappings will be set by set_fixmap():
+ */
+ vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
+- page_table_range_init(vaddr, hypervisor_virt_start, pgd_base);
++ end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
++ page_table_range_init(vaddr, end, pgd_base);
+
+ permanent_kmaps_init(pgd_base);
++
++ xen_pagetable_setup_done(pgd_base);
+ }
+
+ #if defined(CONFIG_SOFTWARE_SUSPEND) || defined(CONFIG_ACPI_SLEEP)
+@@ -750,34 +785,29 @@ int remove_memory(u64 start, u64 size)
+ EXPORT_SYMBOL_GPL(remove_memory);
+ #endif
+
+-struct kmem_cache *pgd_cache;
+ struct kmem_cache *pmd_cache;
+
+ void __init pgtable_cache_init(void)
+ {
++ size_t pgd_size = PTRS_PER_PGD*sizeof(pgd_t);
++
+ if (PTRS_PER_PMD > 1) {
+ pmd_cache = kmem_cache_create("pmd",
+ PTRS_PER_PMD*sizeof(pmd_t),
+ PTRS_PER_PMD*sizeof(pmd_t),
+- 0,
++ SLAB_PANIC,
+ pmd_ctor,
+ NULL);
+- if (!pmd_cache)
+- panic("pgtable_cache_init(): cannot create pmd cache");
++ if (!SHARED_KERNEL_PMD) {
++ /* If we're in PAE mode and have a non-shared
++ kernel pmd, then the pgd size must be a
++ page size. This is because the pgd_list
++ links through the page structure, so there
++ can only be one pgd per page for this to
++ work. */
++ pgd_size = PAGE_SIZE;
++ }
+ }
+- pgd_cache = kmem_cache_create("pgd",
+-#ifndef CONFIG_XEN
+- PTRS_PER_PGD*sizeof(pgd_t),
+- PTRS_PER_PGD*sizeof(pgd_t),
+-#else
+- PAGE_SIZE,
+- PAGE_SIZE,
+-#endif
+- 0,
+- pgd_ctor,
+- PTRS_PER_PMD == 1 ? pgd_dtor : NULL);
+- if (!pgd_cache)
+- panic("pgtable_cache_init(): Cannot create pgd cache");
+ }
+
+ /*
+@@ -811,13 +841,26 @@ static int noinline do_test_wp_bit(void)
+
+ void mark_rodata_ro(void)
+ {
+- unsigned long addr = (unsigned long)__start_rodata;
+-
+- for (; addr < (unsigned long)__end_rodata; addr += PAGE_SIZE)
+- change_page_attr(virt_to_page(addr), 1, PAGE_KERNEL_RO);
++ unsigned long start = PFN_ALIGN(_text);
++ unsigned long size = PFN_ALIGN(_etext) - start;
+
+- printk("Write protecting the kernel read-only data: %uk\n",
+- (__end_rodata - __start_rodata) >> 10);
++#ifndef CONFIG_KPROBES
++#ifdef CONFIG_HOTPLUG_CPU
++ /* It must still be possible to apply SMP alternatives. */
++ if (num_possible_cpus() <= 1)
++#endif
++ {
++ change_page_attr(virt_to_page(start),
++ size >> PAGE_SHIFT, PAGE_KERNEL_RX);
++ printk("Write protecting the kernel text: %luk\n", size >> 10);
++ }
++#endif
++ start += size;
++ size = (unsigned long)__end_rodata - start;
++ change_page_attr(virt_to_page(start),
++ size >> PAGE_SHIFT, PAGE_KERNEL_RO);
++ printk("Write protecting the kernel read-only data: %luk\n",
++ size >> 10);
+
+ /*
+ * change_page_attr() requires a global_flush_tlb() call after it.
+@@ -840,7 +883,7 @@ void free_init_pages(char *what, unsigne
+ free_page(addr);
+ totalram_pages++;
+ }
+- printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
++ printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
+ }
+
+ void free_initmem(void)
+--- a/arch/x86/mm/init_64-xen.c
++++ b/arch/x86/mm/init_64-xen.c
+@@ -25,10 +25,12 @@
+ #include <linux/bootmem.h>
+ #include <linux/proc_fs.h>
+ #include <linux/pci.h>
++#include <linux/pfn.h>
+ #include <linux/poison.h>
+ #include <linux/dma-mapping.h>
+ #include <linux/module.h>
+ #include <linux/memory_hotplug.h>
++#include <linux/nmi.h>
+
+ #include <asm/processor.h>
+ #include <asm/system.h>
+@@ -51,7 +53,7 @@
+ #define Dprintk(x...)
+ #endif
+
+-struct dma_mapping_ops* dma_ops;
++const struct dma_mapping_ops* dma_ops;
+ EXPORT_SYMBOL(dma_ops);
+
+ #if CONFIG_XEN_COMPAT <= 0x030002
+@@ -191,6 +193,13 @@ void show_mem(void)
+
+ for_each_online_pgdat(pgdat) {
+ for (i = 0; i < pgdat->node_spanned_pages; ++i) {
++ /* this loop can take a while with 256 GB and 4k pages
++ so update the NMI watchdog */
++ if (unlikely(i % MAX_ORDER_NR_PAGES == 0)) {
++ touch_nmi_watchdog();
++ }
++ if (!pfn_valid(pgdat->node_start_pfn + i))
++ continue;
+ page = pfn_to_page(pgdat->node_start_pfn + i);
+ total++;
+ if (PageReserved(page))
+@@ -359,7 +368,7 @@ __set_fixmap (enum fixed_addresses idx,
+ }
+ }
+
+-unsigned long __initdata table_start, table_end;
++unsigned long __meminitdata table_start, table_end;
+
+ static __meminit void *alloc_static_page(unsigned long *phys)
+ {
+@@ -376,7 +385,7 @@ static __meminit void *alloc_static_page
+ start_pfn++;
+ memset((void *)va, 0, PAGE_SIZE);
+ return (void *)va;
+-}
++}
+
+ #define PTE_SIZE PAGE_SIZE
+
+@@ -412,28 +421,46 @@ static inline int make_readonly(unsigned
+
+ #ifndef CONFIG_XEN
+ /* Must run before zap_low_mappings */
+-__init void *early_ioremap(unsigned long addr, unsigned long size)
++__meminit void *early_ioremap(unsigned long addr, unsigned long size)
+ {
+- unsigned long map = round_down(addr, LARGE_PAGE_SIZE);
+-
+- /* actually usually some more */
+- if (size >= LARGE_PAGE_SIZE) {
+- return NULL;
++ unsigned long vaddr;
++ pmd_t *pmd, *last_pmd;
++ int i, pmds;
++
++ pmds = ((addr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
++ vaddr = __START_KERNEL_map;
++ pmd = level2_kernel_pgt;
++ last_pmd = level2_kernel_pgt + PTRS_PER_PMD - 1;
++ for (; pmd <= last_pmd; pmd++, vaddr += PMD_SIZE) {
++ for (i = 0; i < pmds; i++) {
++ if (pmd_present(pmd[i]))
++ goto next;
++ }
++ vaddr += addr & ~PMD_MASK;
++ addr &= PMD_MASK;
++ for (i = 0; i < pmds; i++, addr += PMD_SIZE)
++ set_pmd(pmd + i,__pmd(addr | _KERNPG_TABLE | _PAGE_PSE));
++ __flush_tlb();
++ return (void *)vaddr;
++ next:
++ ;
+ }
+- set_pmd(temp_mappings[0].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
+- map += LARGE_PAGE_SIZE;
+- set_pmd(temp_mappings[1].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE));
+- __flush_tlb();
+- return temp_mappings[0].address + (addr & (LARGE_PAGE_SIZE-1));
++ printk("early_ioremap(0x%lx, %lu) failed\n", addr, size);
++ return NULL;
+ }
+
+ /* To avoid virtual aliases later */
+-__init void early_iounmap(void *addr, unsigned long size)
++__meminit void early_iounmap(void *addr, unsigned long size)
+ {
+- if ((void *)round_down((unsigned long)addr, LARGE_PAGE_SIZE) != temp_mappings[0].address)
+- printk("early_iounmap: bad address %p\n", addr);
+- set_pmd(temp_mappings[0].pmd, __pmd(0));
+- set_pmd(temp_mappings[1].pmd, __pmd(0));
++ unsigned long vaddr;
++ pmd_t *pmd;
++ int i, pmds;
++
++ vaddr = (unsigned long)addr;
++ pmds = ((vaddr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
++ pmd = level2_kernel_pgt + pmd_index(vaddr);
++ for (i = 0; i < pmds; i++)
++ pmd_clear(pmd + i);
+ __flush_tlb();
+ }
+ #endif
+@@ -767,14 +794,6 @@ void __meminit init_memory_mapping(unsig
+ __flush_tlb_all();
+ }
+
+-void __cpuinit zap_low_mappings(int cpu)
+-{
+- /* this is not required for Xen */
+-#if 0
+- swap_low_mappings();
+-#endif
+-}
+-
+ #ifndef CONFIG_NUMA
+ void __init paging_init(void)
+ {
+@@ -960,17 +979,6 @@ void __init mem_init(void)
+ reservedpages << (PAGE_SHIFT-10),
+ datasize >> 10,
+ initsize >> 10);
+-
+-#ifndef CONFIG_XEN
+-#ifdef CONFIG_SMP
+- /*
+- * Sync boot_level4_pgt mappings with the init_level4_pgt
+- * except for the low identity mappings which are already zapped
+- * in init_level4_pgt. This sync-up is essential for AP's bringup
+- */
+- memcpy(boot_level4_pgt+1, init_level4_pgt+1, (PTRS_PER_PGD-1)*sizeof(pgd_t));
+-#endif
+-#endif
+ }
+
+ void free_init_pages(char *what, unsigned long begin, unsigned long end)
+@@ -980,7 +988,7 @@ void free_init_pages(char *what, unsigne
+ if (begin >= end)
+ return;
+
+- printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
++ printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
+ for (addr = begin; addr < end; addr += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(addr));
+ init_page_count(virt_to_page(addr));
+@@ -989,24 +997,17 @@ void free_init_pages(char *what, unsigne
+ if (addr >= __START_KERNEL_map) {
+ /* make_readonly() reports all kernel addresses. */
+ __make_page_writable(__va(__pa(addr)));
+- if (HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
+- pgd_t *pgd = pgd_offset_k(addr);
+- pud_t *pud = pud_offset(pgd, addr);
+- pmd_t *pmd = pmd_offset(pud, addr);
+- pte_t *pte = pte_offset_kernel(pmd, addr);
+-
+- xen_l1_entry_update(pte, __pte(0)); /* fallback */
+- }
++ change_page_attr_addr(addr, 1, __pgprot(0));
+ }
+ free_page(addr);
+ totalram_pages++;
+ }
++ if (addr > __START_KERNEL_map)
++ global_flush_tlb();
+ }
+
+ void free_initmem(void)
+ {
+- memset(__initdata_begin, POISON_FREE_INITDATA,
+- __initdata_end - __initdata_begin);
+ free_init_pages("unused kernel memory",
+ (unsigned long)(&__init_begin),
+ (unsigned long)(&__init_end));
+@@ -1016,13 +1017,28 @@ void free_initmem(void)
+
+ void mark_rodata_ro(void)
+ {
+- unsigned long addr = (unsigned long)__start_rodata;
++ unsigned long start = (unsigned long)_stext, end;
++
++#ifdef CONFIG_HOTPLUG_CPU
++ /* It must still be possible to apply SMP alternatives. */
++ if (num_possible_cpus() > 1)
++ start = (unsigned long)_etext;
++#endif
++
++#ifdef CONFIG_KPROBES
++ start = (unsigned long)__start_rodata;
++#endif
++
++ end = (unsigned long)__end_rodata;
++ start = (start + PAGE_SIZE - 1) & PAGE_MASK;
++ end &= PAGE_MASK;
++ if (end <= start)
++ return;
+
+- for (; addr < (unsigned long)__end_rodata; addr += PAGE_SIZE)
+- change_page_attr_addr(addr, 1, PAGE_KERNEL_RO);
++ change_page_attr_addr(start, (end - start) >> PAGE_SHIFT, PAGE_KERNEL_RO);
+
+- printk ("Write protecting the kernel read-only data: %luk\n",
+- (__end_rodata - __start_rodata) >> 10);
++ printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
++ (end - start) >> 10);
+
+ /*
+ * change_page_attr_addr() requires a global_flush_tlb() call after it.
+@@ -1175,3 +1191,11 @@ int in_gate_area_no_task(unsigned long a
+ {
+ return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END);
+ }
++
++#ifndef CONFIG_XEN
++void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
++{
++ return __alloc_bootmem_core(pgdat->bdata, size,
++ SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0);
++}
++#endif
+--- a/arch/x86/mm/ioremap_32-xen.c
++++ b/arch/x86/mm/ioremap_32-xen.c
+@@ -13,6 +13,7 @@
+ #include <linux/slab.h>
+ #include <linux/module.h>
+ #include <linux/io.h>
++#include <linux/sched.h>
+ #include <asm/fixmap.h>
+ #include <asm/cacheflush.h>
+ #include <asm/tlbflush.h>
+--- a/arch/x86/mm/pageattr_64-xen.c
++++ b/arch/x86/mm/pageattr_64-xen.c
+@@ -215,13 +215,13 @@ void mm_pin_all(void)
+ preempt_enable();
+ }
+
+-void _arch_dup_mmap(struct mm_struct *mm)
++void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+ {
+ if (!mm->context.pinned)
+ mm_pin(mm);
+ }
+
+-void _arch_exit_mmap(struct mm_struct *mm)
++void arch_exit_mmap(struct mm_struct *mm)
+ {
+ struct task_struct *tsk = current;
+
+@@ -343,10 +343,11 @@ static void flush_kernel_map(void *arg)
+ struct page *pg;
+
+ /* When clflush is available always use it because it is
+- much cheaper than WBINVD */
+- if (!cpu_has_clflush)
++ much cheaper than WBINVD. Disable clflush for now because
++ the high level code is not ready yet */
++ if (1 || !cpu_has_clflush)
+ asm volatile("wbinvd" ::: "memory");
+- list_for_each_entry(pg, l, lru) {
++ else list_for_each_entry(pg, l, lru) {
+ void *adr = page_address(pg);
+ if (cpu_has_clflush)
+ cache_flush_page(adr);
+@@ -460,16 +461,24 @@ __change_page_attr(unsigned long address
+ */
+ int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
+ {
+- int err = 0;
++ int err = 0, kernel_map = 0;
+ int i;
+
++ if (address >= __START_KERNEL_map
++ && address < __START_KERNEL_map + KERNEL_TEXT_SIZE) {
++ address = (unsigned long)__va(__pa(address));
++ kernel_map = 1;
++ }
++
+ down_write(&init_mm.mmap_sem);
+ for (i = 0; i < numpages; i++, address += PAGE_SIZE) {
+ unsigned long pfn = __pa(address) >> PAGE_SHIFT;
+
+- err = __change_page_attr(address, pfn, prot, PAGE_KERNEL);
+- if (err)
+- break;
++ if (!kernel_map || pte_present(pfn_pte(0, prot))) {
++ err = __change_page_attr(address, pfn, prot, PAGE_KERNEL);
++ if (err)
++ break;
++ }
+ /* Handle kernel mapping too which aliases part of the
+ * lowmem */
+ if (__pa(address) < KERNEL_TEXT_SIZE) {
+--- a/arch/x86/mm/pgtable_32-xen.c
++++ b/arch/x86/mm/pgtable_32-xen.c
+@@ -13,6 +13,7 @@
+ #include <linux/pagemap.h>
+ #include <linux/spinlock.h>
+ #include <linux/module.h>
++#include <linux/quicklist.h>
+
+ #include <asm/system.h>
+ #include <asm/pgtable.h>
+@@ -218,8 +219,6 @@ void pmd_ctor(void *pmd, struct kmem_cac
+ * against pageattr.c; it is the unique case in which a valid change
+ * of kernel pagetables can't be lazily synchronized by vmalloc faults.
+ * vmalloc faults work because attached pagetables are never freed.
+- * The locking scheme was chosen on the basis of manfred's
+- * recommendations and having no core impact whatsoever.
+ * -- wli
+ */
+ DEFINE_SPINLOCK(pgd_lock);
+@@ -245,37 +244,54 @@ static inline void pgd_list_del(pgd_t *p
+ set_page_private(next, (unsigned long)pprev);
+ }
+
+-void pgd_ctor(void *pgd, struct kmem_cache *cache, unsigned long unused)
++
++
++#if (PTRS_PER_PMD == 1)
++/* Non-PAE pgd constructor */
++void pgd_ctor(void *pgd)
+ {
+ unsigned long flags;
+
+- if (PTRS_PER_PMD > 1) {
+- if (HAVE_SHARED_KERNEL_PMD)
+- clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
+- swapper_pg_dir + USER_PTRS_PER_PGD,
+- KERNEL_PGD_PTRS);
+- } else {
+- spin_lock_irqsave(&pgd_lock, flags);
++ /* !PAE, no pagetable sharing */
++ memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
++
++ spin_lock_irqsave(&pgd_lock, flags);
++
++ /* must happen under lock */
++ clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
++ swapper_pg_dir + USER_PTRS_PER_PGD,
++ KERNEL_PGD_PTRS);
++
++ paravirt_alloc_pd_clone(__pa(pgd) >> PAGE_SHIFT,
++ __pa(swapper_pg_dir) >> PAGE_SHIFT,
++ USER_PTRS_PER_PGD,
++ KERNEL_PGD_PTRS);
++ pgd_list_add(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++}
++#else /* PTRS_PER_PMD > 1 */
++/* PAE pgd constructor */
++void pgd_ctor(void *pgd)
++{
++ /* PAE, kernel PMD may be shared */
++
++ if (SHARED_KERNEL_PMD) {
+ clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
+ swapper_pg_dir + USER_PTRS_PER_PGD,
+ KERNEL_PGD_PTRS);
++ } else {
+ memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
+-
+- /* must happen under lock */
+- paravirt_alloc_pd_clone(__pa(pgd) >> PAGE_SHIFT,
+- __pa(swapper_pg_dir) >> PAGE_SHIFT,
+- USER_PTRS_PER_PGD, PTRS_PER_PGD - USER_PTRS_PER_PGD);
+-
+- pgd_list_add(pgd);
+- spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+ }
++#endif /* PTRS_PER_PMD */
+
+-/* never called when PTRS_PER_PMD > 1 */
+-void pgd_dtor(void *pgd, struct kmem_cache *cache, unsigned long unused)
++void pgd_dtor(void *pgd)
+ {
+ unsigned long flags; /* can be called from interrupt context */
+
++ if (SHARED_KERNEL_PMD)
++ return;
++
+ paravirt_release_pd(__pa(pgd) >> PAGE_SHIFT);
+ spin_lock_irqsave(&pgd_lock, flags);
+ pgd_list_del(pgd);
+@@ -284,11 +300,46 @@ void pgd_dtor(void *pgd, struct kmem_cac
+ pgd_test_and_unpin(pgd);
+ }
+
++#define UNSHARED_PTRS_PER_PGD \
++ (SHARED_KERNEL_PMD ? USER_PTRS_PER_PGD : PTRS_PER_PGD)
++
++/* If we allocate a pmd for part of the kernel address space, then
++ make sure its initialized with the appropriate kernel mappings.
++ Otherwise use a cached zeroed pmd. */
++static pmd_t *pmd_cache_alloc(int idx)
++{
++ pmd_t *pmd;
++
++ if (idx >= USER_PTRS_PER_PGD) {
++ pmd = (pmd_t *)__get_free_page(GFP_KERNEL);
++
++#ifndef CONFIG_XEN
++ if (pmd)
++ memcpy(pmd,
++ (void *)pgd_page_vaddr(swapper_pg_dir[idx]),
++ sizeof(pmd_t) * PTRS_PER_PMD);
++#endif
++ } else
++ pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
++
++ return pmd;
++}
++
++static void pmd_cache_free(pmd_t *pmd, int idx)
++{
++ if (idx >= USER_PTRS_PER_PGD) {
++ make_lowmem_page_writable(pmd, XENFEAT_writable_page_tables);
++ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
++ free_page((unsigned long)pmd);
++ } else
++ kmem_cache_free(pmd_cache, pmd);
++}
++
+ pgd_t *pgd_alloc(struct mm_struct *mm)
+ {
+ int i;
+- pgd_t *pgd = kmem_cache_alloc(pgd_cache, GFP_KERNEL);
+- pmd_t **pmd;
++ pgd_t *pgd = quicklist_alloc(0, GFP_KERNEL, pgd_ctor);
++ pmd_t **pmds = NULL;
+ unsigned long flags;
+
+ pgd_test_and_unpin(pgd);
+@@ -296,37 +347,40 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+ if (PTRS_PER_PMD == 1 || !pgd)
+ return pgd;
+
+- if (HAVE_SHARED_KERNEL_PMD) {
+- for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
+- pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
+- if (!pmd)
+- goto out_oom;
+- paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
+- set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
++#ifdef CONFIG_XEN
++ if (!SHARED_KERNEL_PMD) {
++ /*
++ * We can race save/restore (if we sleep during a GFP_KERNEL memory
++ * allocation). We therefore store virtual addresses of pmds as they
++ * do not change across save/restore, and poke the machine addresses
++ * into the pgdir under the pgd_lock.
++ */
++ pmds = kmalloc(PTRS_PER_PGD * sizeof(pmd_t *), GFP_KERNEL);
++ if (!pmds) {
++ quicklist_free(0, pgd_dtor, pgd);
++ return NULL;
+ }
+- return pgd;
+- }
+-
+- /*
+- * We can race save/restore (if we sleep during a GFP_KERNEL memory
+- * allocation). We therefore store virtual addresses of pmds as they
+- * do not change across save/restore, and poke the machine addresses
+- * into the pgdir under the pgd_lock.
+- */
+- pmd = kmalloc(PTRS_PER_PGD * sizeof(pmd_t *), GFP_KERNEL);
+- if (!pmd) {
+- kmem_cache_free(pgd_cache, pgd);
+- return NULL;
+ }
++#endif
+
+ /* Allocate pmds, remember virtual addresses. */
+- for (i = 0; i < PTRS_PER_PGD; ++i) {
+- pmd[i] = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
+- if (!pmd[i])
++ for (i = 0; i < UNSHARED_PTRS_PER_PGD; ++i) {
++ pmd_t *pmd = pmd_cache_alloc(i);
++
++ if (!pmd)
+ goto out_oom;
++
+ paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
++ if (pmds)
++ pmds[i] = pmd;
++ else
++ set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
+ }
+
++#ifdef CONFIG_XEN
++ if (SHARED_KERNEL_PMD)
++ return pgd;
++
+ spin_lock_irqsave(&pgd_lock, flags);
+
+ /* Protect against save/restore: move below 4GB under pgd_lock. */
+@@ -341,44 +395,43 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+
+ /* Copy kernel pmd contents and write-protect the new pmds. */
+ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
+- unsigned long v = (unsigned long)i << PGDIR_SHIFT;
+- pgd_t *kpgd = pgd_offset_k(v);
+- pud_t *kpud = pud_offset(kpgd, v);
+- pmd_t *kpmd = pmd_offset(kpud, v);
+- memcpy(pmd[i], kpmd, PAGE_SIZE);
++ memcpy(pmds[i],
++ (void *)pgd_page_vaddr(swapper_pg_dir[i]),
++ sizeof(pmd_t) * PTRS_PER_PMD);
+ make_lowmem_page_readonly(
+- pmd[i], XENFEAT_writable_page_tables);
++ pmds[i], XENFEAT_writable_page_tables);
+ }
+
+ /* It is safe to poke machine addresses of pmds under the pmd_lock. */
+ for (i = 0; i < PTRS_PER_PGD; i++)
+- set_pgd(&pgd[i], __pgd(1 + __pa(pmd[i])));
++ set_pgd(&pgd[i], __pgd(1 + __pa(pmds[i])));
+
+ /* Ensure this pgd gets picked up and pinned on save/restore. */
+ pgd_list_add(pgd);
+
+ spin_unlock_irqrestore(&pgd_lock, flags);
+
+- kfree(pmd);
++ kfree(pmds);
++#endif
+
+ return pgd;
+
+ out_oom:
+- if (HAVE_SHARED_KERNEL_PMD) {
++ if (!pmds) {
+ for (i--; i >= 0; i--) {
+ pgd_t pgdent = pgd[i];
+ void* pmd = (void *)__va(pgd_val(pgdent)-1);
+ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+- kmem_cache_free(pmd_cache, pmd);
++ pmd_cache_free(pmd, i);
+ }
+ } else {
+ for (i--; i >= 0; i--) {
+- paravirt_release_pd(__pa(pmd[i]) >> PAGE_SHIFT);
+- kmem_cache_free(pmd_cache, pmd[i]);
++ paravirt_release_pd(__pa(pmds[i]) >> PAGE_SHIFT);
++ pmd_cache_free(pmds[i], i);
+ }
+- kfree(pmd);
++ kfree(pmds);
+ }
+- kmem_cache_free(pgd_cache, pgd);
++ quicklist_free(0, pgd_dtor, pgd);
+ return NULL;
+ }
+
+@@ -398,35 +451,24 @@ void pgd_free(pgd_t *pgd)
+
+ /* in the PAE case user pgd entries are overwritten before usage */
+ if (PTRS_PER_PMD > 1) {
+- for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
++ for (i = 0; i < UNSHARED_PTRS_PER_PGD; ++i) {
+ pgd_t pgdent = pgd[i];
+ void* pmd = (void *)__va(pgd_val(pgdent)-1);
+ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+- kmem_cache_free(pmd_cache, pmd);
++ pmd_cache_free(pmd, i);
+ }
+
+- if (!HAVE_SHARED_KERNEL_PMD) {
+- unsigned long flags;
+- spin_lock_irqsave(&pgd_lock, flags);
+- pgd_list_del(pgd);
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-
+- for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
+- pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
+- make_lowmem_page_writable(
+- pmd, XENFEAT_writable_page_tables);
+- memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
+- kmem_cache_free(pmd_cache, pmd);
+- }
+-
+- if (!xen_feature(XENFEAT_pae_pgdir_above_4gb))
+- xen_destroy_contiguous_region(
+- (unsigned long)pgd, 0);
+- }
++ if (!xen_feature(XENFEAT_pae_pgdir_above_4gb))
++ xen_destroy_contiguous_region((unsigned long)pgd, 0);
+ }
+
+ /* in the non-PAE case, free_pgtables() clears user pgd entries */
+- kmem_cache_free(pgd_cache, pgd);
++ quicklist_free(0, pgd_dtor, pgd);
++}
++
++void check_pgt_cache(void)
++{
++ quicklist_trim(0, pgd_dtor, 25, 16);
+ }
+
+ void make_lowmem_page_readonly(void *va, unsigned int feature)
+@@ -723,13 +765,13 @@ void mm_pin_all(void)
+ spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+
+-void _arch_dup_mmap(struct mm_struct *mm)
++void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+ {
+ if (!test_bit(PG_pinned, &virt_to_page(mm->pgd)->flags))
+ mm_pin(mm);
+ }
+
+-void _arch_exit_mmap(struct mm_struct *mm)
++void arch_exit_mmap(struct mm_struct *mm)
+ {
+ struct task_struct *tsk = current;
+
+--- a/drivers/char/tpm/tpm_xen.c
++++ b/drivers/char/tpm/tpm_xen.c
+@@ -463,7 +463,7 @@ static int tpmif_connect(struct xenbus_d
+ tp->backend_id = domid;
+
+ err = bind_listening_port_to_irqhandler(
+- domid, tpmif_int, SA_SAMPLE_RANDOM, "tpmif", tp);
++ domid, tpmif_int, IRQF_SAMPLE_RANDOM, "tpmif", tp);
+ if (err <= 0) {
+ WPRINTK("bind_listening_port_to_irqhandler failed "
+ "(err=%d)\n", err);
+--- a/drivers/pci/msi-xen.c
++++ b/drivers/pci/msi-xen.c
+@@ -12,16 +12,15 @@
+ #include <linux/interrupt.h>
+ #include <linux/init.h>
+ #include <linux/ioport.h>
+-#include <linux/smp_lock.h>
+ #include <linux/pci.h>
+ #include <linux/proc_fs.h>
+ #include <linux/msi.h>
++#include <linux/smp.h>
+
+ #include <xen/evtchn.h>
+
+ #include <asm/errno.h>
+ #include <asm/io.h>
+-#include <asm/smp.h>
+
+ #include "pci.h"
+ #include "msi.h"
+@@ -154,6 +153,7 @@ int register_msi_get_owner(int (*func)(s
+ get_owner = func;
+ return 0;
+ }
++EXPORT_SYMBOL(register_msi_get_owner);
+
+ int unregister_msi_get_owner(int (*func)(struct pci_dev *dev))
+ {
+@@ -162,6 +162,7 @@ int unregister_msi_get_owner(int (*func)
+ get_owner = NULL;
+ return 0;
+ }
++EXPORT_SYMBOL(unregister_msi_get_owner);
+
+ static int msi_get_dev_owner(struct pci_dev *dev)
+ {
+@@ -263,11 +264,6 @@ static int msi_map_vector(struct pci_dev
+ return msi_map_pirq_to_vector(dev, -1, entry_nr, table_base);
+ }
+
+-static int msi_init(void)
+-{
+- return 0;
+-}
+-
+ #ifdef CONFIG_PM
+ static void __pci_restore_msi_state(struct pci_dev *dev)
+ {
+@@ -434,21 +430,32 @@ static int msix_capability_init(struct p
+ }
+
+ /**
+- * pci_msi_supported - check whether MSI may be enabled on device
++ * pci_msi_check_device - check whether MSI may be enabled on a device
+ * @dev: pointer to the pci_dev data structure of MSI device function
++ * @nvec: how many MSIs have been requested ?
++ * @type: are we checking for MSI or MSI-X ?
+ *
+ * Look at global flags, the device itself, and its parent busses
+- * to return 0 if MSI are supported for the device.
++ * to determine if MSI/-X are supported for the device. If MSI/-X is
++ * supported return 0, else return an error code.
+ **/
+-static
+-int pci_msi_supported(struct pci_dev * dev)
++static int pci_msi_check_device(struct pci_dev* dev, int nvec, int type)
+ {
+ struct pci_bus *bus;
++ int ret;
+
+ /* MSI must be globally enabled and supported by the device */
+ if (!pci_msi_enable || !dev || dev->no_msi)
+ return -EINVAL;
+
++ /*
++ * You can't ask to have 0 or less MSIs configured.
++ * a) it's stupid ..
++ * b) the list manipulation code assumes nvec >= 1.
++ */
++ if (nvec < 1)
++ return -ERANGE;
++
+ /* Any bridge which does NOT route MSI transactions from it's
+ * secondary bus to it's primary bus must set NO_MSI flag on
+ * the secondary pci_bus.
+@@ -459,6 +466,13 @@ int pci_msi_supported(struct pci_dev * d
+ if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
+ return -EINVAL;
+
++ ret = arch_msi_check_device(dev, nvec, type);
++ if (ret)
++ return ret;
++
++ if (!pci_find_capability(dev, type))
++ return -EINVAL;
++
+ return 0;
+ }
+
+@@ -476,18 +490,15 @@ extern int pci_frontend_enable_msi(struc
+ int pci_enable_msi(struct pci_dev* dev)
+ {
+ struct pci_bus *bus;
+- int pos, temp, status;
+-
+- if (pci_msi_supported(dev) < 0)
+- return -EINVAL;
++ int temp, status;
+
+ for (bus = dev->bus; bus; bus = bus->parent)
+ if (bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
+ return -EINVAL;
+
+- status = msi_init();
+- if (status < 0)
+- return status;
++ status = pci_msi_check_device(dev, 1, PCI_CAP_ID_MSI);
++ if (status)
++ return status;
+
+ #ifdef CONFIG_XEN_PCIDEV_FRONTEND
+ if (!is_initial_xendomain())
+@@ -508,10 +519,6 @@ int pci_enable_msi(struct pci_dev* dev)
+
+ temp = dev->irq;
+
+- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+- if (!pos)
+- return -EINVAL;
+-
+ /* Check whether driver already requested for MSI-X irqs */
+ if (dev->msix_enabled) {
+ printk(KERN_INFO "PCI: %s: Can't enable MSI. "
+@@ -526,15 +533,14 @@ int pci_enable_msi(struct pci_dev* dev)
+
+ return status;
+ }
++EXPORT_SYMBOL(pci_enable_msi);
+
+ extern void pci_frontend_disable_msi(struct pci_dev* dev);
+ void pci_disable_msi(struct pci_dev* dev)
+ {
+ int pirq;
+
+- if (!pci_msi_enable)
+- return;
+- if (!dev)
++ if (!pci_msi_enable || !dev)
+ return;
+
+ #ifdef CONFIG_XEN_PCIDEV_FRONTEND
+@@ -559,6 +565,7 @@ void pci_disable_msi(struct pci_dev* dev
+ pci_intx(dev, 1); /* enable intx */
+ dev->msi_enabled = 0;
+ }
++EXPORT_SYMBOL(pci_disable_msi);
+
+ /**
+ * pci_enable_msix - configure device's MSI-X capability structure
+@@ -583,7 +590,7 @@ int pci_enable_msix(struct pci_dev* dev,
+ int i, j, temp;
+ u16 control;
+
+- if (!entries || pci_msi_supported(dev) < 0)
++ if (!entries)
+ return -EINVAL;
+
+ #ifdef CONFIG_XEN_PCIDEV_FRONTEND
+@@ -621,14 +628,11 @@ int pci_enable_msix(struct pci_dev* dev,
+ }
+ #endif
+
+- status = msi_init();
+- if (status < 0)
++ status = pci_msi_check_device(dev, nvec, PCI_CAP_ID_MSIX);
++ if (status)
+ return status;
+
+ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+- if (!pos)
+- return -EINVAL;
+-
+ pci_read_config_word(dev, msi_control_reg(pos), &control);
+ nr_entries = multi_msix_capable(control);
+ if (nvec > nr_entries)
+@@ -660,6 +664,7 @@ int pci_enable_msix(struct pci_dev* dev,
+
+ return status;
+ }
++EXPORT_SYMBOL(pci_enable_msix);
+
+ extern void pci_frontend_disable_msix(struct pci_dev* dev);
+ void pci_disable_msix(struct pci_dev* dev)
+@@ -699,6 +704,7 @@ void pci_disable_msix(struct pci_dev* de
+ pci_intx(dev, 1); /* enable intx */
+ dev->msix_enabled = 0;
+ }
++EXPORT_SYMBOL(pci_disable_msix);
+
+ /**
+ * msi_remove_pci_irq_vectors - reclaim MSI(X) irqs to unused state
+@@ -742,12 +748,57 @@ void pci_no_msi(void)
+ pci_msi_enable = 0;
+ }
+
+-EXPORT_SYMBOL(pci_enable_msi);
+-EXPORT_SYMBOL(pci_disable_msi);
+-EXPORT_SYMBOL(pci_enable_msix);
+-EXPORT_SYMBOL(pci_disable_msix);
+-#ifdef CONFIG_XEN
+-EXPORT_SYMBOL(register_msi_get_owner);
+-EXPORT_SYMBOL(unregister_msi_get_owner);
++void pci_msi_init_pci_dev(struct pci_dev *dev)
++{
++#ifndef CONFIG_XEN
++ INIT_LIST_HEAD(&dev->msi_list);
+ #endif
++}
++
++
++/* Arch hooks */
++
++int __attribute__ ((weak))
++arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
++{
++ return 0;
++}
++
++#ifndef CONFIG_XEN
++int __attribute__ ((weak))
++arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *entry)
++{
++ return 0;
++}
++
++int __attribute__ ((weak))
++arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
++{
++ struct msi_desc *entry;
++ int ret;
+
++ list_for_each_entry(entry, &dev->msi_list, list) {
++ ret = arch_setup_msi_irq(dev, entry);
++ if (ret)
++ return ret;
++ }
++
++ return 0;
++}
++
++void __attribute__ ((weak)) arch_teardown_msi_irq(unsigned int irq)
++{
++ return;
++}
++
++void __attribute__ ((weak))
++arch_teardown_msi_irqs(struct pci_dev *dev)
++{
++ struct msi_desc *entry;
++
++ list_for_each_entry(entry, &dev->msi_list, list) {
++ if (entry->irq != 0)
++ arch_teardown_msi_irq(entry->irq);
++ }
++}
++#endif
+--- a/drivers/xen/blkfront/blkfront.c
++++ b/drivers/xen/blkfront/blkfront.c
+@@ -241,7 +241,7 @@ static int setup_blkring(struct xenbus_d
+ info->ring_ref = err;
+
+ err = bind_listening_port_to_irqhandler(
+- dev->otherend_id, blkif_int, SA_SAMPLE_RANDOM, "blkif", info);
++ dev->otherend_id, blkif_int, IRQF_SAMPLE_RANDOM, "blkif", info);
+ if (err <= 0) {
+ xenbus_dev_fatal(dev, err,
+ "bind_listening_port_to_irqhandler");
+--- a/drivers/xen/char/mem.c
++++ b/drivers/xen/char/mem.c
+@@ -18,7 +18,6 @@
+ #include <linux/raw.h>
+ #include <linux/tty.h>
+ #include <linux/capability.h>
+-#include <linux/smp_lock.h>
+ #include <linux/ptrace.h>
+ #include <linux/device.h>
+ #include <asm/pgalloc.h>
+--- a/drivers/xen/core/hypervisor_sysfs.c
++++ b/drivers/xen/core/hypervisor_sysfs.c
+@@ -50,7 +50,7 @@ static int __init hypervisor_subsys_init
+ if (!is_running_on_xen())
+ return -ENODEV;
+
+- hypervisor_subsys.kset.kobj.ktype = &hyp_sysfs_kobj_type;
++ hypervisor_subsys.kobj.ktype = &hyp_sysfs_kobj_type;
+ return 0;
+ }
+
+--- a/drivers/xen/core/smpboot.c
++++ b/drivers/xen/core/smpboot.c
+@@ -165,13 +165,12 @@ static void xen_smp_intr_exit(unsigned i
+
+ void __cpuinit cpu_bringup(void)
+ {
++ cpu_init();
+ #ifdef __i386__
+- cpu_set_gdt(current_thread_info()->cpu);
+- secondary_cpu_init();
++ identify_secondary_cpu(cpu_data + smp_processor_id());
+ #else
+- cpu_init();
+-#endif
+ identify_cpu(cpu_data + smp_processor_id());
++#endif
+ touch_softlockup_watchdog();
+ preempt_disable();
+ local_irq_enable();
+@@ -191,11 +190,6 @@ static void __cpuinit cpu_initialize_con
+ static DEFINE_SPINLOCK(ctxt_lock);
+
+ struct task_struct *idle = idle_task(cpu);
+-#ifdef __x86_64__
+- struct desc_ptr *gdt_descr = &cpu_gdt_descr[cpu];
+-#else
+- struct Xgt_desc_struct *gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
+-#endif
+
+ if (cpu_test_and_set(cpu, cpu_initialized_map))
+ return;
+@@ -218,11 +212,11 @@ static void __cpuinit cpu_initialize_con
+ smp_trap_init(ctxt.trap_ctxt);
+
+ ctxt.ldt_ents = 0;
+-
+- ctxt.gdt_frames[0] = virt_to_mfn(gdt_descr->address);
+- ctxt.gdt_ents = gdt_descr->size / 8;
++ ctxt.gdt_ents = GDT_SIZE / 8;
+
+ #ifdef __i386__
++ ctxt.gdt_frames[0] = virt_to_mfn(get_cpu_gdt_table(cpu));
++
+ ctxt.user_regs.cs = __KERNEL_CS;
+ ctxt.user_regs.esp = idle->thread.esp0 - sizeof(struct pt_regs);
+
+@@ -235,7 +229,11 @@ static void __cpuinit cpu_initialize_con
+ ctxt.failsafe_callback_eip = (unsigned long)failsafe_callback;
+
+ ctxt.ctrlreg[3] = xen_pfn_to_cr3(virt_to_mfn(swapper_pg_dir));
++
++ ctxt.user_regs.fs = __KERNEL_PERCPU;
+ #else /* __x86_64__ */
++ ctxt.gdt_frames[0] = virt_to_mfn(cpu_gdt_descr[cpu].address);
++
+ ctxt.user_regs.cs = __KERNEL_CS;
+ ctxt.user_regs.esp = idle->thread.rsp0 - sizeof(struct pt_regs);
+
+@@ -265,9 +263,8 @@ void __init smp_prepare_cpus(unsigned in
+ struct vcpu_get_physid cpu_id;
+ #ifdef __x86_64__
+ struct desc_ptr *gdt_descr;
+-#else
+- struct Xgt_desc_struct *gdt_descr;
+ #endif
++ void *gdt_addr;
+
+ apicid = 0;
+ if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, 0, &cpu_id) == 0)
+@@ -317,14 +314,12 @@ void __init smp_prepare_cpus(unsigned in
+ }
+ gdt_descr->size = GDT_SIZE;
+ memcpy((void *)gdt_descr->address, cpu_gdt_table, GDT_SIZE);
++ gdt_addr = (void *)gdt_descr->address;
+ #else
+- if (unlikely(!init_gdt(cpu, idle)))
+- continue;
+- gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
++ init_gdt(cpu);
++ gdt_addr = get_cpu_gdt_table(cpu);
+ #endif
+- make_page_readonly(
+- (void *)gdt_descr->address,
+- XENFEAT_writable_descriptor_tables);
++ make_page_readonly(gdt_addr, XENFEAT_writable_descriptor_tables);
+
+ apicid = cpu;
+ if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, cpu, &cpu_id) == 0)
+@@ -338,7 +333,9 @@ void __init smp_prepare_cpus(unsigned in
+ #ifdef __x86_64__
+ cpu_pda(cpu)->pcurrent = idle;
+ cpu_pda(cpu)->cpunumber = cpu;
+- clear_ti_thread_flag(idle->thread_info, TIF_FORK);
++ clear_ti_thread_flag(task_thread_info(idle), TIF_FORK);
++#else
++ per_cpu(current_task, cpu) = idle;
+ #endif
+
+ irq_ctx_init(cpu);
+@@ -363,8 +360,12 @@ void __init smp_prepare_cpus(unsigned in
+ #endif
+ }
+
+-void __devinit smp_prepare_boot_cpu(void)
++void __init smp_prepare_boot_cpu(void)
+ {
++#ifdef __i386__
++ init_gdt(smp_processor_id());
++ switch_to_new_gdt();
++#endif
+ prefill_possible_map();
+ }
+
+--- a/drivers/xen/core/xen_sysfs.c
++++ b/drivers/xen/core/xen_sysfs.c
+@@ -29,12 +29,12 @@ HYPERVISOR_ATTR_RO(type);
+
+ static int __init xen_sysfs_type_init(void)
+ {
+- return sysfs_create_file(&hypervisor_subsys.kset.kobj, &type_attr.attr);
++ return sysfs_create_file(&hypervisor_subsys.kobj, &type_attr.attr);
+ }
+
+ static void xen_sysfs_type_destroy(void)
+ {
+- sysfs_remove_file(&hypervisor_subsys.kset.kobj, &type_attr.attr);
++ sysfs_remove_file(&hypervisor_subsys.kobj, &type_attr.attr);
+ }
+
+ /* xen version attributes */
+@@ -90,13 +90,13 @@ static struct attribute_group version_gr
+
+ static int __init xen_sysfs_version_init(void)
+ {
+- return sysfs_create_group(&hypervisor_subsys.kset.kobj,
++ return sysfs_create_group(&hypervisor_subsys.kobj,
+ &version_group);
+ }
+
+ static void xen_sysfs_version_destroy(void)
+ {
+- sysfs_remove_group(&hypervisor_subsys.kset.kobj, &version_group);
++ sysfs_remove_group(&hypervisor_subsys.kobj, &version_group);
+ }
+
+ /* UUID */
+@@ -126,12 +126,12 @@ HYPERVISOR_ATTR_RO(uuid);
+
+ static int __init xen_sysfs_uuid_init(void)
+ {
+- return sysfs_create_file(&hypervisor_subsys.kset.kobj, &uuid_attr.attr);
++ return sysfs_create_file(&hypervisor_subsys.kobj, &uuid_attr.attr);
+ }
+
+ static void xen_sysfs_uuid_destroy(void)
+ {
+- sysfs_remove_file(&hypervisor_subsys.kset.kobj, &uuid_attr.attr);
++ sysfs_remove_file(&hypervisor_subsys.kobj, &uuid_attr.attr);
+ }
+
+ /* xen compilation attributes */
+@@ -204,13 +204,13 @@ static struct attribute_group xen_compil
+
+ int __init static xen_compilation_init(void)
+ {
+- return sysfs_create_group(&hypervisor_subsys.kset.kobj,
++ return sysfs_create_group(&hypervisor_subsys.kobj,
+ &xen_compilation_group);
+ }
+
+ static void xen_compilation_destroy(void)
+ {
+- sysfs_remove_group(&hypervisor_subsys.kset.kobj,
++ sysfs_remove_group(&hypervisor_subsys.kobj,
+ &xen_compilation_group);
+ }
+
+@@ -325,13 +325,13 @@ static struct attribute_group xen_proper
+
+ static int __init xen_properties_init(void)
+ {
+- return sysfs_create_group(&hypervisor_subsys.kset.kobj,
++ return sysfs_create_group(&hypervisor_subsys.kobj,
+ &xen_properties_group);
+ }
+
+ static void xen_properties_destroy(void)
+ {
+- sysfs_remove_group(&hypervisor_subsys.kset.kobj,
++ sysfs_remove_group(&hypervisor_subsys.kobj,
+ &xen_properties_group);
+ }
+
+@@ -350,13 +350,13 @@ HYPERVISOR_ATTR_RO(vmcoreinfo);
+
+ static int __init xen_sysfs_vmcoreinfo_init(void)
+ {
+- return sysfs_create_file(&hypervisor_subsys.kset.kobj,
++ return sysfs_create_file(&hypervisor_subsys.kobj,
+ &vmcoreinfo_attr.attr);
+ }
+
+ static void xen_sysfs_vmcoreinfo_destroy(void)
+ {
+- sysfs_remove_file(&hypervisor_subsys.kset.kobj, &vmcoreinfo_attr.attr);
++ sysfs_remove_file(&hypervisor_subsys.kobj, &vmcoreinfo_attr.attr);
+ }
+
+ #endif
+--- a/drivers/xen/netback/netback.c
++++ b/drivers/xen/netback/netback.c
+@@ -179,7 +179,7 @@ static struct sk_buff *netbk_copy_skb(st
+ goto err;
+
+ skb_reserve(nskb, 16 + NET_IP_ALIGN);
+- headlen = nskb->end - nskb->data;
++ headlen = skb_end_pointer(nskb) - nskb->data;
+ if (headlen > skb_headlen(skb))
+ headlen = skb_headlen(skb);
+ ret = skb_copy_bits(skb, 0, __skb_put(nskb, headlen), headlen);
+@@ -225,11 +225,15 @@ static struct sk_buff *netbk_copy_skb(st
+ len -= copy;
+ }
+
++#ifdef NET_SKBUFF_DATA_USES_OFFSET
++ offset = 0;
++#else
+ offset = nskb->data - skb->data;
++#endif
+
+- nskb->h.raw = skb->h.raw + offset;
+- nskb->nh.raw = skb->nh.raw + offset;
+- nskb->mac.raw = skb->mac.raw + offset;
++ nskb->transport_header = skb->transport_header + offset;
++ nskb->network_header = skb->network_header + offset;
++ nskb->mac_header = skb->mac_header + offset;
+
+ return nskb;
+
+@@ -1601,7 +1605,7 @@ static int __init netback_init(void)
+ (void)bind_virq_to_irqhandler(VIRQ_DEBUG,
+ 0,
+ netif_be_dbg,
+- SA_SHIRQ,
++ IRQF_SHARED,
+ "net-be-dbg",
+ &netif_be_dbg);
+ #endif
+--- a/drivers/xen/netfront/netfront.c
++++ b/drivers/xen/netfront/netfront.c
+@@ -513,7 +513,7 @@ static int setup_device(struct xenbus_de
+ memcpy(netdev->dev_addr, info->mac, ETH_ALEN);
+
+ err = bind_listening_port_to_irqhandler(
+- dev->otherend_id, netif_int, SA_SAMPLE_RANDOM, netdev->name,
++ dev->otherend_id, netif_int, IRQF_SAMPLE_RANDOM, netdev->name,
+ netdev);
+ if (err < 0)
+ goto fail;
+--- a/drivers/xen/pciback/xenbus.c
++++ b/drivers/xen/pciback/xenbus.c
+@@ -99,7 +99,7 @@ static int pciback_do_attach(struct pcib
+
+ err = bind_interdomain_evtchn_to_irqhandler(
+ pdev->xdev->otherend_id, remote_evtchn, pciback_handle_event,
+- SA_SAMPLE_RANDOM, "pciback", pdev);
++ IRQF_SAMPLE_RANDOM, "pciback", pdev);
+ if (err < 0) {
+ xenbus_dev_fatal(pdev->xdev, err,
+ "Error binding event channel to IRQ");
+--- a/drivers/xen/pcifront/xenbus.c
++++ b/drivers/xen/pcifront/xenbus.c
+@@ -10,10 +10,6 @@
+ #include <xen/gnttab.h>
+ #include "pcifront.h"
+
+-#ifndef __init_refok
+-#define __init_refok
+-#endif
+-
+ #define INVALID_GRANT_REF (0)
+ #define INVALID_EVTCHN (-1)
+
+--- a/drivers/xen/scsifront/xenbus.c
++++ b/drivers/xen/scsifront/xenbus.c
+@@ -96,7 +96,7 @@ static int scsifront_alloc_ring(struct v
+
+ err = bind_listening_port_to_irqhandler(
+ dev->otherend_id, scsifront_intr,
+- SA_SAMPLE_RANDOM, "scsifront", info);
++ IRQF_SAMPLE_RANDOM, "scsifront", info);
+
+ if (err <= 0) {
+ xenbus_dev_fatal(dev, err, "bind_listening_port_to_irqhandler");
+--- a/drivers/xen/sfc_netback/accel_fwd.c
++++ b/drivers/xen/sfc_netback/accel_fwd.c
+@@ -308,7 +308,7 @@ static struct netback_accel *for_a_vnic(
+ static inline int packet_is_arp_reply(struct sk_buff *skb)
+ {
+ return skb->protocol == ntohs(ETH_P_ARP)
+- && skb->nh.arph->ar_op == ntohs(ARPOP_REPLY);
++ && arp_hdr(skb)->ar_op == ntohs(ARPOP_REPLY);
+ }
+
+
+@@ -392,12 +392,13 @@ void netback_accel_tx_packet(struct sk_b
+
+ BUG_ON(fwd_priv == NULL);
+
+- if (is_broadcast_ether_addr(skb->mac.raw) && packet_is_arp_reply(skb)) {
++ if (is_broadcast_ether_addr(skb_mac_header(skb))
++ && packet_is_arp_reply(skb)) {
+ /*
+ * update our fast path forwarding to reflect this
+ * gratuitous ARP
+ */
+- mac = skb->mac.raw+ETH_ALEN;
++ mac = skb_mac_header(skb)+ETH_ALEN;
+
+ DPRINTK("%s: found gratuitous ARP for " MAC_FMT "\n",
+ __FUNCTION__, MAC_ARG(mac));
+--- a/drivers/xen/sfc_netback/accel_solarflare.c
++++ b/drivers/xen/sfc_netback/accel_solarflare.c
+@@ -114,7 +114,7 @@ bend_dl_tx_packet(struct efx_dl_device *
+ BUG_ON(port == NULL);
+
+ NETBACK_ACCEL_STATS_OP(global_stats.dl_tx_packets++);
+- if (skb->mac.raw != NULL)
++ if (skb_mac_header_was_set(skb))
+ netback_accel_tx_packet(skb, port->fwd_priv);
+ else {
+ DPRINTK("Ignoring packet with missing mac address\n");
+--- a/drivers/xen/sfc_netfront/accel_tso.c
++++ b/drivers/xen/sfc_netfront/accel_tso.c
+@@ -33,10 +33,9 @@
+
+ #include "accel_tso.h"
+
+-#define PTR_DIFF(p1, p2) ((u8*)(p1) - (u8*)(p2))
+-#define ETH_HDR_LEN(skb) ((skb)->nh.raw - (skb)->data)
+-#define SKB_TCP_OFF(skb) PTR_DIFF ((skb)->h.th, (skb)->data)
+-#define SKB_IP_OFF(skb) PTR_DIFF ((skb)->nh.iph, (skb)->data)
++#define ETH_HDR_LEN(skb) skb_network_offset(skb)
++#define SKB_TCP_OFF(skb) skb_transport_offset(skb)
++#define SKB_IP_OFF(skb) skb_network_offset(skb)
+
+ /*
+ * Set a maximum number of buffers in each output packet to make life
+@@ -114,9 +113,8 @@ struct netfront_accel_tso_state {
+ static inline void tso_check_safe(struct sk_buff *skb) {
+ EPRINTK_ON(skb->protocol != htons (ETH_P_IP));
+ EPRINTK_ON(((struct ethhdr*) skb->data)->h_proto != htons (ETH_P_IP));
+- EPRINTK_ON(skb->nh.iph->protocol != IPPROTO_TCP);
+- EPRINTK_ON((SKB_TCP_OFF(skb)
+- + (skb->h.th->doff << 2u)) > skb_headlen(skb));
++ EPRINTK_ON(ip_hdr(skb)->protocol != IPPROTO_TCP);
++ EPRINTK_ON((SKB_TCP_OFF(skb) + tcp_hdrlen(skb)) > skb_headlen(skb));
+ }
+
+
+@@ -129,17 +127,17 @@ static inline void tso_start(struct netf
+ * All ethernet/IP/TCP headers combined size is TCP header size
+ * plus offset of TCP header relative to start of packet.
+ */
+- st->p.header_length = (skb->h.th->doff << 2u) + SKB_TCP_OFF(skb);
++ st->p.header_length = tcp_hdrlen(skb) + SKB_TCP_OFF(skb);
+ st->p.full_packet_size = (st->p.header_length
+ + skb_shinfo(skb)->gso_size);
+ st->p.gso_size = skb_shinfo(skb)->gso_size;
+
+- st->p.ip_id = htons(skb->nh.iph->id);
+- st->seqnum = ntohl(skb->h.th->seq);
++ st->p.ip_id = htons(ip_hdr(skb)->id);
++ st->seqnum = ntohl(tcp_hdr(skb)->seq);
+
+- EPRINTK_ON(skb->h.th->urg);
+- EPRINTK_ON(skb->h.th->syn);
+- EPRINTK_ON(skb->h.th->rst);
++ EPRINTK_ON(tcp_hdr(skb)->urg);
++ EPRINTK_ON(tcp_hdr(skb)->syn);
++ EPRINTK_ON(tcp_hdr(skb)->rst);
+
+ st->remaining_len = skb->len - st->p.header_length;
+
+@@ -258,8 +256,8 @@ int tso_start_new_packet(netfront_accel_
+ /* This packet will be the last in the TSO burst. */
+ ip_length = (st->p.header_length - ETH_HDR_LEN(skb)
+ + st->remaining_len);
+- tsoh_th->fin = skb->h.th->fin;
+- tsoh_th->psh = skb->h.th->psh;
++ tsoh_th->fin = tcp_hdr(skb)->fin;
++ tsoh_th->psh = tcp_hdr(skb)->psh;
+ }
+
+ tsoh_iph->tot_len = htons(ip_length);
+--- a/drivers/xen/sfc_netfront/accel_vi.c
++++ b/drivers/xen/sfc_netfront/accel_vi.c
+@@ -463,7 +463,7 @@ netfront_accel_enqueue_skb_multi(netfron
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ /* Set to zero to encourage falcon to work it out for us */
+- *(u16*)(skb->h.raw + skb->csum_offset) = 0;
++ *(u16*)(skb->head + skb->csum_start + skb->csum_offset) = 0;
+ }
+
+ if (multi_post_start_new_buffer(vnic, &state)) {
+@@ -582,7 +582,7 @@ netfront_accel_enqueue_skb_single(netfro
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ /* Set to zero to encourage falcon to work it out for us */
+- *(u16*)(skb->h.raw + skb->csum_offset) = 0;
++ *(u16*)(skb->head + skb->csum_start + skb->csum_offset) = 0;
+ }
+ NETFRONT_ACCEL_PKTBUFF_FOR_EACH_FRAGMENT
+ (skb, idx, frag_data, frag_len, {
+--- a/drivers/xen/sfc_netfront/accel_xenbus.c
++++ b/drivers/xen/sfc_netfront/accel_xenbus.c
+@@ -356,7 +356,7 @@ static int vnic_setup_domU_shared_state(
+ /* Create xenbus msg event channel */
+ err = bind_listening_port_to_irqhandler
+ (dev->otherend_id, netfront_accel_msg_channel_irq_from_bend,
+- SA_SAMPLE_RANDOM, "vnicctrl", vnic);
++ IRQF_SAMPLE_RANDOM, "vnicctrl", vnic);
+ if (err < 0) {
+ EPRINTK("Couldn't bind msg event channel\n");
+ goto fail_msg_irq;
+@@ -367,7 +367,7 @@ static int vnic_setup_domU_shared_state(
+ /* Create xenbus net event channel */
+ err = bind_listening_port_to_irqhandler
+ (dev->otherend_id, netfront_accel_net_channel_irq_from_bend,
+- SA_SAMPLE_RANDOM, "vnicfront", vnic);
++ IRQF_SAMPLE_RANDOM, "vnicfront", vnic);
+ if (err < 0) {
+ EPRINTK("Couldn't bind net event channel\n");
+ goto fail_net_irq;
+--- a/fs/aio.c
++++ b/fs/aio.c
+@@ -38,7 +38,7 @@
+
+ #ifdef CONFIG_EPOLL
+ #include <linux/poll.h>
+-#include <linux/eventpoll.h>
++#include <linux/anon_inodes.h>
+ #endif
+
+ #if DEBUG > 1
+@@ -1309,7 +1309,7 @@ static const struct file_operations aioq
+
+ /* make_aio_fd:
+ * Create a file descriptor that can be used to poll the event queue.
+- * Based and piggybacked on the excellent epoll code.
++ * Based on the excellent epoll code.
+ */
+
+ static int make_aio_fd(struct kioctx *ioctx)
+@@ -1318,7 +1318,8 @@ static int make_aio_fd(struct kioctx *io
+ struct inode *inode;
+ struct file *file;
+
+- error = ep_getfd(&fd, &inode, &file, NULL, &aioq_fops);
++ error = anon_inode_getfd(&fd, &inode, &file, "[aioq]",
++ &aioq_fops, ioctx);
+ if (error)
+ return error;
+
+--- a/include/asm-x86/mach-xen/asm/desc_32.h
++++ b/include/asm-x86/mach-xen/asm/desc_32.h
+@@ -11,23 +11,24 @@
+
+ #include <asm/mmu.h>
+
+-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+-
+ struct Xgt_desc_struct {
+ unsigned short size;
+ unsigned long address __attribute__((packed));
+ unsigned short pad;
+ } __attribute__ ((packed));
+
+-extern struct Xgt_desc_struct idt_descr;
+-DECLARE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
+-extern struct Xgt_desc_struct early_gdt_descr;
++struct gdt_page
++{
++ struct desc_struct gdt[GDT_ENTRIES];
++} __attribute__((aligned(PAGE_SIZE)));
++DECLARE_PER_CPU(struct gdt_page, gdt_page);
+
+ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+ {
+- return (struct desc_struct *)per_cpu(cpu_gdt_descr, cpu).address;
++ return per_cpu(gdt_page, cpu).gdt;
+ }
+
++extern struct Xgt_desc_struct idt_descr;
+ extern struct desc_struct idt_table[];
+ extern void set_intr_gate(unsigned int irq, void * addr);
+
+@@ -55,53 +56,32 @@ static inline void pack_gate(__u32 *a, _
+ #define DESCTYPE_S 0x10 /* !system */
+
+ #ifndef CONFIG_XEN
+-#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
+-
+-#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr))
+-#define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr))
++#define load_TR_desc() native_load_tr_desc()
++#define load_gdt(dtr) native_load_gdt(dtr)
++#define load_idt(dtr) native_load_idt(dtr)
+ #define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+ #define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+
+-#define store_gdt(dtr) __asm__ ("sgdt %0":"=m" (*dtr))
+-#define store_idt(dtr) __asm__ ("sidt %0":"=m" (*dtr))
+-#define store_tr(tr) __asm__ ("str %0":"=m" (tr))
++#define store_gdt(dtr) native_store_gdt(dtr)
++#define store_idt(dtr) native_store_idt(dtr)
++#define store_tr(tr) (tr = native_store_tr())
+ #define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+-#endif
+
+-#if TLS_SIZE != 24
+-# error update this code.
+-#endif
+-
+-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
+-{
+-#define C(i) if (HYPERVISOR_update_descriptor(virt_to_machine(&get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i]), \
+- *(u64 *)&t->tls_array[i]) \
+- BUG()
+- C(0); C(1); C(2);
+-#undef C
+-}
++#define load_TLS(t, cpu) native_load_tls(t, cpu)
++#define set_ldt native_set_ldt
+
+-#ifndef CONFIG_XEN
+ #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+ #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+ #define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+
+-static inline void write_dt_entry(void *dt, int entry, __u32 entry_a, __u32 entry_b)
++static inline void write_dt_entry(struct desc_struct *dt,
++ int entry, u32 entry_low, u32 entry_high)
+ {
+- __u32 *lp = (__u32 *)((char *)dt + entry*8);
+- *lp = entry_a;
+- *(lp+1) = entry_b;
++ dt[entry].a = entry_low;
++ dt[entry].b = entry_high;
+ }
+-#define set_ldt native_set_ldt
+-#else
+-extern int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b);
+-extern int write_gdt_entry(void *gdt, int entry, __u32 entry_a, __u32 entry_b);
+-#define set_ldt xen_set_ldt
+-#endif
+
+-#ifndef CONFIG_XEN
+-static inline fastcall void native_set_ldt(const void *addr,
+- unsigned int entries)
++static inline void native_set_ldt(const void *addr, unsigned int entries)
+ {
+ if (likely(entries == 0))
+ __asm__ __volatile__("lldt %w0"::"q" (0));
+@@ -116,6 +96,65 @@ static inline fastcall void native_set_l
+ __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+ }
+ }
++
++
++static inline void native_load_tr_desc(void)
++{
++ asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
++}
++
++static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
++{
++ asm volatile("lgdt %0"::"m" (*dtr));
++}
++
++static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
++{
++ asm volatile("lidt %0"::"m" (*dtr));
++}
++
++static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
++{
++ asm ("sgdt %0":"=m" (*dtr));
++}
++
++static inline void native_store_idt(struct Xgt_desc_struct *dtr)
++{
++ asm ("sidt %0":"=m" (*dtr));
++}
++
++static inline unsigned long native_store_tr(void)
++{
++ unsigned long tr;
++ asm ("str %0":"=r" (tr));
++ return tr;
++}
++
++static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
++{
++ unsigned int i;
++ struct desc_struct *gdt = get_cpu_gdt_table(cpu);
++
++ for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
++ gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
++}
++#else
++#define load_TLS(t, cpu) xen_load_tls(t, cpu)
++#define set_ldt xen_set_ldt
++
++extern int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b);
++extern int write_gdt_entry(void *gdt, int entry, __u32 entry_a, __u32 entry_b);
++
++static inline void xen_load_tls(struct thread_struct *t, unsigned int cpu)
++{
++ unsigned int i;
++ struct desc_struct *gdt = get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN;
++
++ for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
++ if (HYPERVISOR_update_descriptor(virt_to_machine(&gdt[i]),
++ *(u64 *)&t->tls_array[i]))
++ BUG();
++}
+ #endif
+
+ #ifndef CONFIG_X86_NO_IDT
+--- a/include/asm-x86/mach-xen/asm/desc_64.h
++++ b/include/asm-x86/mach-xen/asm/desc_64.h
+@@ -127,16 +127,6 @@ static inline void set_ldt_desc(unsigned
+ DESC_LDT, size * 8 - 1);
+ }
+
+-static inline void set_seg_base(unsigned cpu, int entry, void *base)
+-{
+- struct desc_struct *d = &cpu_gdt(cpu)[entry];
+- u32 addr = (u32)(u64)base;
+- BUG_ON((u64)base >> 32);
+- d->base0 = addr & 0xffff;
+- d->base1 = (addr >> 16) & 0xff;
+- d->base2 = (addr >> 24) & 0xff;
+-}
+-
+ #define LDT_entry_a(info) \
+ ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
+ /* Don't allow setting of the lm bit. It is useless anyways because
+@@ -165,25 +155,15 @@ static inline void set_seg_base(unsigned
+ (info)->useable == 0 && \
+ (info)->lm == 0)
+
+-#if TLS_SIZE != 24
+-# error update this code.
+-#endif
+-
+ static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
+ {
+-#if 0
++ unsigned int i;
+ u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+- gdt[0] = t->tls_array[0];
+- gdt[1] = t->tls_array[1];
+- gdt[2] = t->tls_array[2];
+-#endif
+-#define C(i) \
+- if (HYPERVISOR_update_descriptor(virt_to_machine(&cpu_gdt(cpu)[GDT_ENTRY_TLS_MIN + i]), \
+- t->tls_array[i])) \
+- BUG();
+
+- C(0); C(1); C(2);
+-#undef C
++ for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
++ if (HYPERVISOR_update_descriptor(virt_to_machine(&gdt[i]),
++ t->tls_array[i]))
++ BUG();
+ }
+
+ /*
+--- a/include/asm-x86/mach-xen/asm/dma-mapping_64.h
++++ b/include/asm-x86/mach-xen/asm/dma-mapping_64.h
+@@ -51,7 +51,7 @@ struct dma_mapping_ops {
+ };
+
+ extern dma_addr_t bad_dma_address;
+-extern struct dma_mapping_ops* dma_ops;
++extern const struct dma_mapping_ops* dma_ops;
+ extern int iommu_merge;
+
+ #if 0
+--- a/include/asm-x86/mach-xen/asm/fixmap_32.h
++++ b/include/asm-x86/mach-xen/asm/fixmap_32.h
+@@ -19,10 +19,8 @@
+ * the start of the fixmap.
+ */
+ extern unsigned long __FIXADDR_TOP;
+-#ifdef CONFIG_COMPAT_VDSO
+-#define FIXADDR_USER_START __fix_to_virt(FIX_VDSO)
+-#define FIXADDR_USER_END __fix_to_virt(FIX_VDSO - 1)
+-#endif
++#define FIXADDR_USER_START __fix_to_virt(FIX_VDSO)
++#define FIXADDR_USER_END __fix_to_virt(FIX_VDSO - 1)
+
+ #ifndef __ASSEMBLY__
+ #include <linux/kernel.h>
+@@ -85,6 +83,9 @@ enum fixed_addresses {
+ #ifdef CONFIG_PCI_MMCONFIG
+ FIX_PCIE_MCFG,
+ #endif
++#ifdef CONFIG_PARAVIRT
++ FIX_PARAVIRT_BOOTMAP,
++#endif
+ FIX_SHARED_INFO,
+ #define NR_FIX_ISAMAPS 256
+ FIX_ISAMAP_END,
+--- a/include/asm-x86/mach-xen/asm/fixmap_64.h
++++ b/include/asm-x86/mach-xen/asm/fixmap_64.h
+@@ -15,7 +15,6 @@
+ #include <asm/apicdef.h>
+ #include <asm/page.h>
+ #include <asm/vsyscall.h>
+-#include <asm/vsyscall32.h>
+ #include <asm/acpi.h>
+
+ /*
+--- a/include/asm-x86/mach-xen/asm/highmem.h
++++ b/include/asm-x86/mach-xen/asm/highmem.h
+@@ -67,12 +67,18 @@ extern void FASTCALL(kunmap_high(struct
+
+ void *kmap(struct page *page);
+ void kunmap(struct page *page);
++void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot);
+ void *kmap_atomic(struct page *page, enum km_type type);
+ void *kmap_atomic_pte(struct page *page, enum km_type type);
+ void kunmap_atomic(void *kvaddr, enum km_type type);
+ void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
+ struct page *kmap_atomic_to_page(void *ptr);
+
++#define kmap_atomic_pte(page, type) \
++ kmap_atomic_prot(page, type, \
++ test_bit(PG_pinned, &(page)->flags) \
++ ? PAGE_KERNEL_RO : kmap_prot)
++
+ #define flush_cache_kmaps() do { } while (0)
+
+ void clear_highpage(struct page *);
+--- a/include/asm-x86/mach-xen/asm/io_32.h
++++ b/include/asm-x86/mach-xen/asm/io_32.h
+@@ -263,15 +263,18 @@ static inline void flush_write_buffers(v
+
+ #endif /* __KERNEL__ */
+
+-#define __SLOW_DOWN_IO "outb %%al,$0x80;"
++static inline void xen_io_delay(void)
++{
++ asm volatile("outb %%al,$0x80" : : : "memory");
++}
+
+ static inline void slow_down_io(void) {
+- __asm__ __volatile__(
+- __SLOW_DOWN_IO
++ xen_io_delay();
+ #ifdef REALLY_SLOW_IO
+- __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
++ xen_io_delay();
++ xen_io_delay();
++ xen_io_delay();
+ #endif
+- : : );
+ }
+
+ #ifdef CONFIG_X86_NUMAQ
+--- a/include/asm-x86/mach-xen/asm/irqflags_32.h
++++ b/include/asm-x86/mach-xen/asm/irqflags_32.h
+@@ -11,6 +11,40 @@
+ #define _ASM_IRQFLAGS_H
+
+ #ifndef __ASSEMBLY__
++#define xen_save_fl(void) (current_vcpu_info()->evtchn_upcall_mask)
++
++#define xen_restore_fl(f) \
++do { \
++ vcpu_info_t *_vcpu; \
++ barrier(); \
++ _vcpu = current_vcpu_info(); \
++ if ((_vcpu->evtchn_upcall_mask = (f)) == 0) { \
++ barrier(); /* unmask then check (avoid races) */\
++ if (unlikely(_vcpu->evtchn_upcall_pending)) \
++ force_evtchn_callback(); \
++ } \
++} while (0)
++
++#define xen_irq_disable() \
++do { \
++ current_vcpu_info()->evtchn_upcall_mask = 1; \
++ barrier(); \
++} while (0)
++
++#define xen_irq_enable() \
++do { \
++ vcpu_info_t *_vcpu; \
++ barrier(); \
++ _vcpu = current_vcpu_info(); \
++ _vcpu->evtchn_upcall_mask = 0; \
++ barrier(); /* unmask then check (avoid races) */ \
++ if (unlikely(_vcpu->evtchn_upcall_pending)) \
++ force_evtchn_callback(); \
++} while (0)
++
++void xen_safe_halt(void);
++
++void xen_halt(void);
+
+ /*
+ * The use of 'barrier' in the following reflects their use as local-lock
+@@ -20,48 +54,31 @@
+ * includes these barriers, for example.
+ */
+
+-#define __raw_local_save_flags() (current_vcpu_info()->evtchn_upcall_mask)
++#define __raw_local_save_flags() xen_save_fl()
+
+-#define raw_local_irq_restore(x) \
+-do { \
+- vcpu_info_t *_vcpu; \
+- barrier(); \
+- _vcpu = current_vcpu_info(); \
+- if ((_vcpu->evtchn_upcall_mask = (x)) == 0) { \
+- barrier(); /* unmask then check (avoid races) */ \
+- if (unlikely(_vcpu->evtchn_upcall_pending)) \
+- force_evtchn_callback(); \
+- } \
+-} while (0)
++#define raw_local_irq_restore(flags) xen_restore_fl(flags)
+
+-#define raw_local_irq_disable() \
+-do { \
+- current_vcpu_info()->evtchn_upcall_mask = 1; \
+- barrier(); \
+-} while (0)
++#define raw_local_irq_disable() xen_irq_disable()
+
+-#define raw_local_irq_enable() \
+-do { \
+- vcpu_info_t *_vcpu; \
+- barrier(); \
+- _vcpu = current_vcpu_info(); \
+- _vcpu->evtchn_upcall_mask = 0; \
+- barrier(); /* unmask then check (avoid races) */ \
+- if (unlikely(_vcpu->evtchn_upcall_pending)) \
+- force_evtchn_callback(); \
+-} while (0)
++#define raw_local_irq_enable() xen_irq_enable()
+
+ /*
+ * Used in the idle loop; sti takes one instruction cycle
+ * to complete:
+ */
+-void raw_safe_halt(void);
++static inline void raw_safe_halt(void)
++{
++ xen_safe_halt();
++}
+
+ /*
+ * Used when interrupts are already enabled or to
+ * shutdown the processor:
+ */
+-void halt(void);
++static inline void halt(void)
++{
++ xen_halt();
++}
+
+ /*
+ * For spinlocks, etc:
+--- a/include/asm-x86/mach-xen/asm/irqflags_64.h
++++ b/include/asm-x86/mach-xen/asm/irqflags_64.h
+@@ -9,6 +9,7 @@
+ */
+ #ifndef _ASM_IRQFLAGS_H
+ #define _ASM_IRQFLAGS_H
++#include <asm/processor-flags.h>
+
+ #ifndef __ASSEMBLY__
+ /*
+@@ -50,19 +51,19 @@ static inline void raw_local_irq_disable
+ {
+ unsigned long flags = __raw_local_save_flags();
+
+- raw_local_irq_restore((flags & ~(1 << 9)) | (1 << 18));
++ raw_local_irq_restore((flags & ~X86_EFLAGS_IF) | X86_EFLAGS_AC);
+ }
+
+ static inline void raw_local_irq_enable(void)
+ {
+ unsigned long flags = __raw_local_save_flags();
+
+- raw_local_irq_restore((flags | (1 << 9)) & ~(1 << 18));
++ raw_local_irq_restore((flags | X86_EFLAGS_IF) & (~X86_EFLAGS_AC));
+ }
+
+ static inline int raw_irqs_disabled_flags(unsigned long flags)
+ {
+- return !(flags & (1<<9)) || (flags & (1 << 18));
++ return !(flags & X86_EFLAGS_IF) || (flags & X86_EFLAGS_AC);
+ }
+
+ #else /* CONFIG_X86_VSMP */
+@@ -118,13 +119,21 @@ static inline int raw_irqs_disabled_flag
+ * Used in the idle loop; sti takes one instruction cycle
+ * to complete:
+ */
+-void raw_safe_halt(void);
++void xen_safe_halt(void);
++static inline void raw_safe_halt(void)
++{
++ xen_safe_halt();
++}
+
+ /*
+ * Used when interrupts are already enabled or to
+ * shutdown the processor:
+ */
+-void halt(void);
++void xen_halt(void);
++static inline void halt(void)
++{
++ xen_halt();
++}
+
+ #else /* __ASSEMBLY__: */
+ # ifdef CONFIG_TRACE_IRQFLAGS
+--- a/include/asm-x86/mach-xen/asm/mmu_context_32.h
++++ b/include/asm-x86/mach-xen/asm/mmu_context_32.h
+@@ -6,6 +6,20 @@
+ #include <asm/pgalloc.h>
+ #include <asm/tlbflush.h>
+
++void arch_exit_mmap(struct mm_struct *mm);
++void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
++
++void mm_pin(struct mm_struct *mm);
++void mm_unpin(struct mm_struct *mm);
++void mm_pin_all(void);
++
++static inline void xen_activate_mm(struct mm_struct *prev,
++ struct mm_struct *next)
++{
++ if (!test_bit(PG_pinned, &virt_to_page(next->pgd)->flags))
++ mm_pin(next);
++}
++
+ /*
+ * Used for LDT copy/destruction.
+ */
+@@ -37,10 +51,6 @@ static inline void __prepare_arch_switch
+ : : "r" (0) );
+ }
+
+-extern void mm_pin(struct mm_struct *mm);
+-extern void mm_unpin(struct mm_struct *mm);
+-void mm_pin_all(void);
+-
+ static inline void switch_mm(struct mm_struct *prev,
+ struct mm_struct *next,
+ struct task_struct *tsk)
+@@ -97,11 +107,10 @@ static inline void switch_mm(struct mm_s
+ #define deactivate_mm(tsk, mm) \
+ asm("movl %0,%%gs": :"r" (0));
+
+-static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
+-{
+- if (!test_bit(PG_pinned, &virt_to_page(next->pgd)->flags))
+- mm_pin(next);
+- switch_mm(prev, next, NULL);
+-}
++#define activate_mm(prev, next) \
++ do { \
++ xen_activate_mm(prev, next); \
++ switch_mm((prev),(next),NULL); \
++ } while(0)
+
+ #endif
+--- a/include/asm-x86/mach-xen/asm/mmu_context_64.h
++++ b/include/asm-x86/mach-xen/asm/mmu_context_64.h
+@@ -9,6 +9,9 @@
+ #include <asm/pgtable.h>
+ #include <asm/tlbflush.h>
+
++void arch_exit_mmap(struct mm_struct *mm);
++void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
++
+ /*
+ * possibly do the LDT unload here?
+ */
+--- a/include/asm-x86/mach-xen/asm/page_64.h
++++ b/include/asm-x86/mach-xen/asm/page_64.h
+@@ -7,6 +7,7 @@
+ #include <linux/types.h>
+ #include <asm/bug.h>
+ #endif
++#include <linux/const.h>
+ #include <xen/interface/xen.h>
+
+ /*
+@@ -19,18 +20,14 @@
+
+ /* PAGE_SHIFT determines the page size */
+ #define PAGE_SHIFT 12
+-#ifdef __ASSEMBLY__
+-#define PAGE_SIZE (0x1 << PAGE_SHIFT)
+-#else
+-#define PAGE_SIZE (1UL << PAGE_SHIFT)
+-#endif
++#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
+ #define PAGE_MASK (~(PAGE_SIZE-1))
+
+ /* See Documentation/x86_64/mm.txt for a description of the memory map. */
+ #define __PHYSICAL_MASK_SHIFT 46
+-#define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
++#define __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1)
+ #define __VIRTUAL_MASK_SHIFT 48
+-#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
++#define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
+
+ #define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
+
+@@ -55,10 +52,10 @@
+ #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
+
+ #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
+-#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
++#define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
+
+ #define HPAGE_SHIFT PMD_SHIFT
+-#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
++#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
+ #define HPAGE_MASK (~(HPAGE_SIZE - 1))
+ #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
+
+@@ -152,17 +149,23 @@ static inline pgd_t __pgd(unsigned long
+
+ #define __pgprot(x) ((pgprot_t) { (x) } )
+
+-#define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START)
+-#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
+-#define __START_KERNEL_map 0xffffffff80000000UL
+-#define __PAGE_OFFSET 0xffff880000000000UL
++#endif /* !__ASSEMBLY__ */
+
+-#else
+ #define __PHYSICAL_START CONFIG_PHYSICAL_START
++#define __KERNEL_ALIGN 0x200000
++
++/*
++ * Make sure kernel is aligned to 2MB address. Catching it at compile
++ * time is better. Change your config file and compile the kernel
++ * for a 2MB aligned address (CONFIG_PHYSICAL_START)
++ */
++#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
++#error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
++#endif
++
+ #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
+-#define __START_KERNEL_map 0xffffffff80000000
+-#define __PAGE_OFFSET 0xffff880000000000
+-#endif /* !__ASSEMBLY__ */
++#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
++#define __PAGE_OFFSET _AC(0xffff880000000000, UL)
+
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ #undef LOAD_OFFSET
+@@ -172,20 +175,20 @@ static inline pgd_t __pgd(unsigned long
+ /* to align the pointer to the (next) page boundary */
+ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+-#define KERNEL_TEXT_SIZE (40UL*1024*1024)
+-#define KERNEL_TEXT_START 0xffffffff80000000UL
++#define KERNEL_TEXT_SIZE (40*1024*1024)
++#define KERNEL_TEXT_START _AC(0xffffffff80000000, UL)
++
++#define PAGE_OFFSET __PAGE_OFFSET
+
+-#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
++#ifndef __ASSEMBLY__
++static inline unsigned long __phys_addr(unsigned long x)
++{
++ return x - (x >= __START_KERNEL_map ? __START_KERNEL_map : PAGE_OFFSET);
++}
++#endif
+
+-/* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
+- Otherwise you risk miscompilation. */
+-#define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
+-/* __pa_symbol should be used for C visible symbols.
+- This seems to be the official gcc blessed way to do such arithmetic. */
+-#define __pa_symbol(x) \
+- ({unsigned long v; \
+- asm("" : "=r" (v) : "0" (x)); \
+- __pa(v); })
++#define __pa(x) __phys_addr((unsigned long)(x))
++#define __pa_symbol(x) __phys_addr((unsigned long)(x))
+
+ #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
+ #define __boot_va(x) __va(x)
+--- a/include/asm-x86/mach-xen/asm/pgalloc_32.h
++++ b/include/asm-x86/mach-xen/asm/pgalloc_32.h
+@@ -1,7 +1,6 @@
+ #ifndef _I386_PGALLOC_H
+ #define _I386_PGALLOC_H
+
+-#include <asm/fixmap.h>
+ #include <linux/threads.h>
+ #include <linux/mm.h> /* for struct page */
+ #include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
+@@ -69,6 +68,4 @@ do { \
+ #define pud_populate(mm, pmd, pte) BUG()
+ #endif
+
+-#define check_pgt_cache() do { } while (0)
+-
+ #endif /* _I386_PGALLOC_H */
+--- a/include/asm-x86/mach-xen/asm/pgalloc_64.h
++++ b/include/asm-x86/mach-xen/asm/pgalloc_64.h
+@@ -1,7 +1,6 @@
+ #ifndef _X86_64_PGALLOC_H
+ #define _X86_64_PGALLOC_H
+
+-#include <asm/fixmap.h>
+ #include <asm/pda.h>
+ #include <linux/threads.h>
+ #include <linux/mm.h>
+@@ -100,24 +99,16 @@ static inline void pgd_list_add(pgd_t *p
+ struct page *page = virt_to_page(pgd);
+
+ spin_lock(&pgd_lock);
+- page->index = (pgoff_t)pgd_list;
+- if (pgd_list)
+- pgd_list->private = (unsigned long)&page->index;
+- pgd_list = page;
+- page->private = (unsigned long)&pgd_list;
++ list_add(&page->lru, &pgd_list);
+ spin_unlock(&pgd_lock);
+ }
+
+ static inline void pgd_list_del(pgd_t *pgd)
+ {
+- struct page *next, **pprev, *page = virt_to_page(pgd);
++ struct page *page = virt_to_page(pgd);
+
+ spin_lock(&pgd_lock);
+- next = (struct page *)page->index;
+- pprev = (struct page **)page->private;
+- *pprev = next;
+- if (next)
+- next->private = (unsigned long)pprev;
++ list_del(&page->lru);
+ spin_unlock(&pgd_lock);
+ }
+
+--- a/include/asm-x86/mach-xen/asm/pgtable_32.h
++++ b/include/asm-x86/mach-xen/asm/pgtable_32.h
+@@ -24,11 +24,11 @@
+ #include <linux/slab.h>
+ #include <linux/list.h>
+ #include <linux/spinlock.h>
++#include <linux/sched.h>
+
+ /* Is this pagetable pinned? */
+ #define PG_pinned PG_arch_1
+
+-struct mm_struct;
+ struct vm_area_struct;
+
+ /*
+@@ -38,17 +38,16 @@ struct vm_area_struct;
+ #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+ extern unsigned long empty_zero_page[1024];
+ extern pgd_t *swapper_pg_dir;
+-extern struct kmem_cache *pgd_cache;
+ extern struct kmem_cache *pmd_cache;
+ extern spinlock_t pgd_lock;
+ extern struct page *pgd_list;
++void check_pgt_cache(void);
+
+ void pmd_ctor(void *, struct kmem_cache *, unsigned long);
+-void pgd_ctor(void *, struct kmem_cache *, unsigned long);
+-void pgd_dtor(void *, struct kmem_cache *, unsigned long);
+ void pgtable_cache_init(void);
+ void paging_init(void);
+
++
+ /*
+ * The Linux x86 paging architecture is 'compile-time dual-mode', it
+ * implements both the traditional 2-level x86 page tables and the
+@@ -165,6 +164,7 @@ void paging_init(void);
+
+ extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
+ #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
++#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
+ #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD)
+ #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
+ #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
+@@ -172,6 +172,7 @@ extern unsigned long long __PAGE_KERNEL,
+ #define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
+ #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
+ #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
++#define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
+ #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
+ #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
+ #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
+@@ -275,7 +276,13 @@ static inline pte_t pte_mkhuge(pte_t pte
+ */
+ #define pte_update(mm, addr, ptep) do { } while (0)
+ #define pte_update_defer(mm, addr, ptep) do { } while (0)
+-#define paravirt_map_pt_hook(slot, va, pfn) do { } while (0)
++
++/* local pte updates need not use xchg for locking */
++static inline pte_t xen_local_ptep_get_and_clear(pte_t *ptep, pte_t res)
++{
++ xen_set_pte(ptep, __pte(0));
++ return res;
++}
+
+ /*
+ * We only update the dirty/accessed state if we set
+@@ -286,17 +293,34 @@ static inline pte_t pte_mkhuge(pte_t pte
+ */
+ #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+ #define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
+-do { \
+- if (dirty) \
++({ \
++ int __changed = !pte_same(*(ptep), entry); \
++ if (__changed && (dirty)) \
+ ptep_establish(vma, address, ptep, entry); \
+-} while (0)
++ __changed; \
++})
+
+-/*
+- * We don't actually have these, but we want to advertise them so that
+- * we can encompass the flush here.
+- */
+ #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
++#define ptep_test_and_clear_dirty(vma, addr, ptep) ({ \
++ int __ret = 0; \
++ if (pte_dirty(*(ptep))) \
++ __ret = test_and_clear_bit(_PAGE_BIT_DIRTY, \
++ &(ptep)->pte_low); \
++ if (__ret) \
++ pte_update((vma)->vm_mm, addr, ptep); \
++ __ret; \
++})
++
+ #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
++#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
++ int __ret = 0; \
++ if (pte_young(*(ptep))) \
++ __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
++ &(ptep)->pte_low); \
++ if (__ret) \
++ pte_update((vma)->vm_mm, addr, ptep); \
++ __ret; \
++})
+
+ /*
+ * Rules for using ptep_establish: the pte MUST be a user pte, and
+@@ -323,7 +347,7 @@ do { \
+ int __dirty = pte_dirty(__pte); \
+ __pte = pte_mkclean(__pte); \
+ if (test_bit(PG_pinned, &virt_to_page((vma)->vm_mm->pgd)->flags)) \
+- ptep_set_access_flags(vma, address, ptep, __pte, __dirty); \
++ (void)ptep_set_access_flags(vma, address, ptep, __pte, __dirty); \
+ else if (__dirty) \
+ (ptep)->pte_low = __pte.pte_low; \
+ __dirty; \
+@@ -336,7 +360,7 @@ do { \
+ int __young = pte_young(__pte); \
+ __pte = pte_mkold(__pte); \
+ if (test_bit(PG_pinned, &virt_to_page((vma)->vm_mm->pgd)->flags)) \
+- ptep_set_access_flags(vma, address, ptep, __pte, __young); \
++ (void)ptep_set_access_flags(vma, address, ptep, __pte, __young); \
+ else if (__young) \
+ (ptep)->pte_low = __pte.pte_low; \
+ __young; \
+@@ -349,7 +373,7 @@ static inline pte_t ptep_get_and_clear(s
+ if (!pte_none(pte)
+ && (mm != &init_mm
+ || HYPERVISOR_update_va_mapping(addr, __pte(0), 0))) {
+- pte = raw_ptep_get_and_clear(ptep, pte);
++ pte = xen_ptep_get_and_clear(ptep, pte);
+ pte_update(mm, addr, ptep);
+ }
+ return pte;
+@@ -491,24 +515,10 @@ extern pte_t *lookup_address(unsigned lo
+ #endif
+
+ #if defined(CONFIG_HIGHPTE)
+-#define pte_offset_map(dir, address) \
+-({ \
+- pte_t *__ptep; \
+- unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \
+- __ptep = (pte_t *)kmap_atomic_pte(pfn_to_page(pfn),KM_PTE0); \
+- paravirt_map_pt_hook(KM_PTE0,__ptep, pfn); \
+- __ptep = __ptep + pte_index(address); \
+- __ptep; \
+-})
+-#define pte_offset_map_nested(dir, address) \
+-({ \
+- pte_t *__ptep; \
+- unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \
+- __ptep = (pte_t *)kmap_atomic_pte(pfn_to_page(pfn),KM_PTE1); \
+- paravirt_map_pt_hook(KM_PTE1,__ptep, pfn); \
+- __ptep = __ptep + pte_index(address); \
+- __ptep; \
+-})
++#define pte_offset_map(dir, address) \
++ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
++#define pte_offset_map_nested(dir, address) \
++ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
+ #define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
+ #define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
+ #else
+@@ -584,10 +594,6 @@ int xen_change_pte_range(struct mm_struc
+ #define io_remap_pfn_range(vma,from,pfn,size,prot) \
+ direct_remap_pfn_range(vma,from,pfn,size,prot,DOMID_IO)
+
+-#define MK_IOSPACE_PFN(space, pfn) (pfn)
+-#define GET_IOSPACE(pfn) 0
+-#define GET_PFN(pfn) (pfn)
+-
+ #include <asm-generic/pgtable.h>
+
+ #endif /* _I386_PGTABLE_H */
+--- a/include/asm-x86/mach-xen/asm/pgtable-3level-defs.h
++++ b/include/asm-x86/mach-xen/asm/pgtable-3level-defs.h
+@@ -1,7 +1,7 @@
+ #ifndef _I386_PGTABLE_3LEVEL_DEFS_H
+ #define _I386_PGTABLE_3LEVEL_DEFS_H
+
+-#define HAVE_SHARED_KERNEL_PMD 0
++#define SHARED_KERNEL_PMD 0
+
+ /*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+--- a/include/asm-x86/mach-xen/asm/pgtable-3level.h
++++ b/include/asm-x86/mach-xen/asm/pgtable-3level.h
+@@ -52,32 +52,40 @@ static inline int pte_exec_kernel(pte_t
+ * value and then use set_pte to update it. -ben
+ */
+
+-static inline void set_pte(pte_t *ptep, pte_t pte)
++static inline void xen_set_pte(pte_t *ptep, pte_t pte)
+ {
+ ptep->pte_high = pte.pte_high;
+ smp_wmb();
+ ptep->pte_low = pte.pte_low;
+ }
+-#define set_pte_atomic(pteptr,pteval) \
+- set_64bit((unsigned long long *)(pteptr),__pte_val(pteval))
+
+-#define set_pte_at(_mm,addr,ptep,pteval) do { \
+- if (((_mm) != current->mm && (_mm) != &init_mm) || \
+- HYPERVISOR_update_va_mapping((addr), (pteval), 0)) \
+- set_pte((ptep), (pteval)); \
+-} while (0)
+-
+-#define set_pmd(pmdptr,pmdval) \
+- xen_l2_entry_update((pmdptr), (pmdval))
+-#define set_pud(pudptr,pudval) \
+- xen_l3_entry_update((pudptr), (pudval))
++static inline void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
++ pte_t *ptep , pte_t pte)
++{
++ if ((mm != current->mm && mm != &init_mm) ||
++ HYPERVISOR_update_va_mapping(addr, pte, 0))
++ xen_set_pte(ptep, pte);
++}
++
++static inline void xen_set_pte_atomic(pte_t *ptep, pte_t pte)
++{
++ set_64bit((unsigned long long *)(ptep),__pte_val(pte));
++}
++static inline void xen_set_pmd(pmd_t *pmdp, pmd_t pmd)
++{
++ xen_l2_entry_update(pmdp, pmd);
++}
++static inline void xen_set_pud(pud_t *pudp, pud_t pud)
++{
++ xen_l3_entry_update(pudp, pud);
++}
+
+ /*
+ * For PTEs and PDEs, we must clear the P-bit first when clearing a page table
+ * entry, so clear the bottom half first and enforce ordering with a compiler
+ * barrier.
+ */
+-static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++static inline void xen_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+ {
+ if ((mm != current->mm && mm != &init_mm)
+ || HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
+@@ -87,7 +95,18 @@ static inline void pte_clear(struct mm_s
+ }
+ }
+
+-#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
++static inline void xen_pmd_clear(pmd_t *pmd)
++{
++ xen_l2_entry_update(pmd, __pmd(0));
++}
++
++#define set_pte(ptep, pte) xen_set_pte(ptep, pte)
++#define set_pte_at(mm, addr, ptep, pte) xen_set_pte_at(mm, addr, ptep, pte)
++#define set_pte_atomic(ptep, pte) xen_set_pte_atomic(ptep, pte)
++#define set_pmd(pmdp, pmd) xen_set_pmd(pmdp, pmd)
++#define set_pud(pudp, pud) xen_set_pud(pudp, pud)
++#define pte_clear(mm, addr, ptep) xen_pte_clear(mm, addr, ptep)
++#define pmd_clear(pmd) xen_pmd_clear(pmd)
+
+ /*
+ * Pentium-II erratum A13: in PAE mode we explicitly have to flush
+@@ -108,7 +127,8 @@ static inline void pud_clear (pud_t * pu
+ #define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
+ pmd_index(address))
+
+-static inline pte_t raw_ptep_get_and_clear(pte_t *ptep, pte_t res)
++#ifdef CONFIG_SMP
++static inline pte_t xen_ptep_get_and_clear(pte_t *ptep, pte_t res)
+ {
+ uint64_t val = __pte_val(res);
+ if (__cmpxchg64(ptep, val, 0) != val) {
+@@ -119,6 +139,9 @@ static inline pte_t raw_ptep_get_and_cle
+ }
+ return res;
+ }
++#else
++#define xen_ptep_get_and_clear(xp, pte) xen_local_ptep_get_and_clear(xp, pte)
++#endif
+
+ #define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+ #define ptep_clear_flush(vma, addr, ptep) \
+@@ -165,13 +188,13 @@ extern unsigned long long __supported_pt
+ static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
+ {
+ return __pte((((unsigned long long)page_nr << PAGE_SHIFT) |
+- pgprot_val(pgprot)) & __supported_pte_mask);
++ pgprot_val(pgprot)) & __supported_pte_mask);
+ }
+
+ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
+ {
+ return __pmd((((unsigned long long)page_nr << PAGE_SHIFT) |
+- pgprot_val(pgprot)) & __supported_pte_mask);
++ pgprot_val(pgprot)) & __supported_pte_mask);
+ }
+
+ /*
+@@ -191,6 +214,4 @@ static inline pmd_t pfn_pmd(unsigned lon
+
+ #define __pmd_free_tlb(tlb, x) do { } while (0)
+
+-void vmalloc_sync_all(void);
+-
+ #endif /* _I386_PGTABLE_3LEVEL_H */
+--- a/include/asm-x86/mach-xen/asm/pgtable_64.h
++++ b/include/asm-x86/mach-xen/asm/pgtable_64.h
+@@ -1,12 +1,14 @@
+ #ifndef _X86_64_PGTABLE_H
+ #define _X86_64_PGTABLE_H
+
++#include <linux/const.h>
++#ifndef __ASSEMBLY__
++
+ /*
+ * This file contains the functions and defines necessary to modify and use
+ * the x86-64 page table tree.
+ */
+ #include <asm/processor.h>
+-#include <asm/fixmap.h>
+ #include <asm/bitops.h>
+ #include <linux/threads.h>
+ #include <linux/sched.h>
+@@ -33,11 +35,9 @@ extern pte_t *lookup_address(unsigned lo
+ #endif
+
+ extern pud_t level3_kernel_pgt[512];
+-extern pud_t level3_physmem_pgt[512];
+ extern pud_t level3_ident_pgt[512];
+ extern pmd_t level2_kernel_pgt[512];
+ extern pgd_t init_level4_pgt[];
+-extern pgd_t boot_level4_pgt[];
+ extern unsigned long __supported_pte_mask;
+
+ #define swapper_pg_dir init_level4_pgt
+@@ -52,6 +52,8 @@ extern void clear_kernel_mapping(unsigne
+ extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
+ #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+
++#endif /* !__ASSEMBLY__ */
++
+ /*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+ */
+@@ -76,6 +78,8 @@ extern unsigned long empty_zero_page[PAG
+ */
+ #define PTRS_PER_PTE 512
+
++#ifndef __ASSEMBLY__
++
+ #define pte_ERROR(e) \
+ printk("%s:%d: bad pte %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
+ &(e), __pte_val(e), pte_pfn(e))
+@@ -118,22 +122,23 @@ static inline void pgd_clear (pgd_t * pg
+
+ #define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK))
+
+-#define PMD_SIZE (1UL << PMD_SHIFT)
++#endif /* !__ASSEMBLY__ */
++
++#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
+ #define PMD_MASK (~(PMD_SIZE-1))
+-#define PUD_SIZE (1UL << PUD_SHIFT)
++#define PUD_SIZE (_AC(1,UL) << PUD_SHIFT)
+ #define PUD_MASK (~(PUD_SIZE-1))
+-#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
++#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
+ #define PGDIR_MASK (~(PGDIR_SIZE-1))
+
+ #define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
+ #define FIRST_USER_ADDRESS 0
+
+-#ifndef __ASSEMBLY__
+-#define MAXMEM 0x3fffffffffffUL
+-#define VMALLOC_START 0xffffc20000000000UL
+-#define VMALLOC_END 0xffffe1ffffffffffUL
+-#define MODULES_VADDR 0xffffffff88000000UL
+-#define MODULES_END 0xfffffffffff00000UL
++#define MAXMEM _AC(0x3fffffffffff, UL)
++#define VMALLOC_START _AC(0xffffc20000000000, UL)
++#define VMALLOC_END _AC(0xffffe1ffffffffff, UL)
++#define MODULES_VADDR _AC(0xffffffff88000000, UL)
++#define MODULES_END _AC(0xfffffffffff00000, UL)
+ #define MODULES_LEN (MODULES_END - MODULES_VADDR)
+
+ #define _PAGE_BIT_PRESENT 0
+@@ -159,16 +164,18 @@ static inline void pgd_clear (pgd_t * pg
+ #define _PAGE_GLOBAL 0x100 /* Global TLB entry */
+
+ #define _PAGE_PROTNONE 0x080 /* If not present */
+-#define _PAGE_NX (1UL<<_PAGE_BIT_NX)
++#define _PAGE_NX (_AC(1,UL)<<_PAGE_BIT_NX)
+
+ /* Mapped page is I/O or foreign and has no associated page struct. */
+ #define _PAGE_IO 0x200
+
++#ifndef __ASSEMBLY__
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ extern unsigned int __kernel_page_user;
+ #else
+ #define __kernel_page_user 0
+ #endif
++#endif
+
+ #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
+ #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY | __kernel_page_user)
+@@ -233,6 +240,8 @@ extern unsigned int __kernel_page_user;
+ #define __S110 PAGE_SHARED_EXEC
+ #define __S111 PAGE_SHARED_EXEC
+
++#ifndef __ASSEMBLY__
++
+ static inline unsigned long pgd_bad(pgd_t pgd)
+ {
+ return __pgd_val(pgd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
+@@ -344,6 +353,20 @@ static inline pte_t pte_mkwrite(pte_t pt
+ static inline pte_t pte_mkhuge(pte_t pte) { __pte_val(pte) |= _PAGE_PSE; return pte; }
+ static inline pte_t pte_clrhuge(pte_t pte) { __pte_val(pte) &= ~_PAGE_PSE; return pte; }
+
++static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
++{
++ if (!pte_dirty(*ptep))
++ return 0;
++ return test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte);
++}
++
++static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
++{
++ if (!pte_young(*ptep))
++ return 0;
++ return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte);
++}
++
+ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+ {
+ pte_t pte = *ptep;
+@@ -468,18 +491,12 @@ static inline pte_t pte_modify(pte_t pte
+ * bit at the same time. */
+ #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+ #define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
+- do { \
+- if (dirty) \
+- ptep_establish(vma, address, ptep, entry); \
+- } while (0)
+-
+-
+-/*
+- * i386 says: We don't actually have these, but we want to advertise
+- * them so that we can encompass the flush here.
+- */
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
++({ \
++ int __changed = !pte_same(*(ptep), entry); \
++ if (__changed && (dirty)) \
++ ptep_establish(vma, address, ptep, entry); \
++ __changed; \
++})
+
+ #define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
+ #define ptep_clear_flush_dirty(vma, address, ptep) \
+@@ -488,7 +505,7 @@ static inline pte_t pte_modify(pte_t pte
+ int __dirty = pte_dirty(__pte); \
+ __pte = pte_mkclean(__pte); \
+ if ((vma)->vm_mm->context.pinned) \
+- ptep_set_access_flags(vma, address, ptep, __pte, __dirty); \
++ (void)ptep_set_access_flags(vma, address, ptep, __pte, __dirty); \
+ else if (__dirty) \
+ set_pte(ptep, __pte); \
+ __dirty; \
+@@ -501,7 +518,7 @@ static inline pte_t pte_modify(pte_t pte
+ int __young = pte_young(__pte); \
+ __pte = pte_mkold(__pte); \
+ if ((vma)->vm_mm->context.pinned) \
+- ptep_set_access_flags(vma, address, ptep, __pte, __young); \
++ (void)ptep_set_access_flags(vma, address, ptep, __pte, __young); \
+ else if (__young) \
+ set_pte(ptep, __pte); \
+ __young; \
+@@ -515,10 +532,7 @@ static inline pte_t pte_modify(pte_t pte
+ #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+
+ extern spinlock_t pgd_lock;
+-extern struct page *pgd_list;
+-void vmalloc_sync_all(void);
+-
+-#endif /* !__ASSEMBLY__ */
++extern struct list_head pgd_list;
+
+ extern int kern_addr_valid(unsigned long addr);
+
+@@ -557,10 +571,6 @@ int xen_change_pte_range(struct mm_struc
+ #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
+ direct_remap_pfn_range(vma,vaddr,pfn,size,prot,DOMID_IO)
+
+-#define MK_IOSPACE_PFN(space, pfn) (pfn)
+-#define GET_IOSPACE(pfn) 0
+-#define GET_PFN(pfn) (pfn)
+-
+ #define HAVE_ARCH_UNMAPPED_AREA
+
+ #define pgtable_cache_init() do { } while (0)
+@@ -574,11 +584,14 @@ int xen_change_pte_range(struct mm_struc
+ #define kc_offset_to_vaddr(o) \
+ (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))
+
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
+ #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+ #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
+ #define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+ #define __HAVE_ARCH_PTEP_SET_WRPROTECT
+ #define __HAVE_ARCH_PTE_SAME
+ #include <asm-generic/pgtable.h>
++#endif /* !__ASSEMBLY__ */
+
+ #endif /* _X86_64_PGTABLE_H */
+--- a/include/asm-x86/mach-xen/asm/processor_32.h
++++ b/include/asm-x86/mach-xen/asm/processor_32.h
+@@ -21,6 +21,7 @@
+ #include <asm/percpu.h>
+ #include <linux/cpumask.h>
+ #include <linux/init.h>
++#include <asm/processor-flags.h>
+ #include <xen/interface/physdev.h>
+
+ /* flag for disabling the tsc */
+@@ -118,7 +119,8 @@ extern char ignore_fpu_irq;
+
+ void __init cpu_detect(struct cpuinfo_x86 *c);
+
+-extern void identify_cpu(struct cpuinfo_x86 *);
++extern void identify_boot_cpu(void);
++extern void identify_secondary_cpu(struct cpuinfo_x86 *);
+ extern void print_cpu_info(struct cpuinfo_x86 *);
+ extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
+ extern unsigned short num_cache_leaves;
+@@ -129,29 +131,8 @@ extern void detect_ht(struct cpuinfo_x86
+ static inline void detect_ht(struct cpuinfo_x86 *c) {}
+ #endif
+
+-/*
+- * EFLAGS bits
+- */
+-#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */
+-#define X86_EFLAGS_PF 0x00000004 /* Parity Flag */
+-#define X86_EFLAGS_AF 0x00000010 /* Auxillary carry Flag */
+-#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */
+-#define X86_EFLAGS_SF 0x00000080 /* Sign Flag */
+-#define X86_EFLAGS_TF 0x00000100 /* Trap Flag */
+-#define X86_EFLAGS_IF 0x00000200 /* Interrupt Flag */
+-#define X86_EFLAGS_DF 0x00000400 /* Direction Flag */
+-#define X86_EFLAGS_OF 0x00000800 /* Overflow Flag */
+-#define X86_EFLAGS_IOPL 0x00003000 /* IOPL mask */
+-#define X86_EFLAGS_NT 0x00004000 /* Nested Task */
+-#define X86_EFLAGS_RF 0x00010000 /* Resume Flag */
+-#define X86_EFLAGS_VM 0x00020000 /* Virtual Mode */
+-#define X86_EFLAGS_AC 0x00040000 /* Alignment Check */
+-#define X86_EFLAGS_VIF 0x00080000 /* Virtual Interrupt Flag */
+-#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
+-#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
+-
+-static inline fastcall void xen_cpuid(unsigned int *eax, unsigned int *ebx,
+- unsigned int *ecx, unsigned int *edx)
++static inline void xen_cpuid(unsigned int *eax, unsigned int *ebx,
++ unsigned int *ecx, unsigned int *edx)
+ {
+ /* ecx is often an input as well as an output. */
+ __asm__(XEN_CPUID
+@@ -165,21 +146,6 @@ static inline fastcall void xen_cpuid(un
+ #define load_cr3(pgdir) write_cr3(__pa(pgdir))
+
+ /*
+- * Intel CPU features in CR4
+- */
+-#define X86_CR4_VME 0x0001 /* enable vm86 extensions */
+-#define X86_CR4_PVI 0x0002 /* virtual interrupts flag enable */
+-#define X86_CR4_TSD 0x0004 /* disable time stamp at ipl 3 */
+-#define X86_CR4_DE 0x0008 /* enable debugging extensions */
+-#define X86_CR4_PSE 0x0010 /* enable page size extensions */
+-#define X86_CR4_PAE 0x0020 /* enable physical address extensions */
+-#define X86_CR4_MCE 0x0040 /* Machine check enable */
+-#define X86_CR4_PGE 0x0080 /* enable global pages */
+-#define X86_CR4_PCE 0x0100 /* enable performance counters at ipl 3 */
+-#define X86_CR4_OSFXSR 0x0200 /* enable fast FPU save and restore */
+-#define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */
+-
+-/*
+ * Save the cr4 feature set we're using (ie
+ * Pentium 4MB enable and PPro Global page
+ * enable), so that any CPU's that boot up
+@@ -206,26 +172,6 @@ static inline void clear_in_cr4 (unsigne
+ }
+
+ /*
+- * NSC/Cyrix CPU configuration register indexes
+- */
+-
+-#define CX86_PCR0 0x20
+-#define CX86_GCR 0xb8
+-#define CX86_CCR0 0xc0
+-#define CX86_CCR1 0xc1
+-#define CX86_CCR2 0xc2
+-#define CX86_CCR3 0xc3
+-#define CX86_CCR4 0xe8
+-#define CX86_CCR5 0xe9
+-#define CX86_CCR6 0xea
+-#define CX86_CCR7 0xeb
+-#define CX86_PCR1 0xf0
+-#define CX86_DIR0 0xfe
+-#define CX86_DIR1 0xff
+-#define CX86_ARR_BASE 0xc4
+-#define CX86_RCR_BASE 0xdc
+-
+-/*
+ * NSC/Cyrix CPU indexed register access macros
+ */
+
+@@ -351,7 +297,8 @@ typedef struct {
+ struct thread_struct;
+
+ #ifndef CONFIG_X86_NO_TSS
+-struct tss_struct {
++/* This is the TSS defined by the hardware. */
++struct i386_hw_tss {
+ unsigned short back_link,__blh;
+ unsigned long esp0;
+ unsigned short ss0,__ss0h;
+@@ -375,6 +322,11 @@ struct tss_struct {
+ unsigned short gs, __gsh;
+ unsigned short ldt, __ldth;
+ unsigned short trace, io_bitmap_base;
++} __attribute__((packed));
++
++struct tss_struct {
++ struct i386_hw_tss x86_tss;
++
+ /*
+ * The extra 1 is there because the CPU will access an
+ * additional byte beyond the end of the IO permission
+@@ -428,10 +380,11 @@ struct thread_struct {
+ };
+
+ #define INIT_THREAD { \
++ .esp0 = sizeof(init_stack) + (long)&init_stack, \
+ .vm86_info = NULL, \
+ .sysenter_cs = __KERNEL_CS, \
+ .io_bitmap_ptr = NULL, \
+- .fs = __KERNEL_PDA, \
++ .fs = __KERNEL_PERCPU, \
+ }
+
+ /*
+@@ -441,10 +394,12 @@ struct thread_struct {
+ * be within the limit.
+ */
+ #define INIT_TSS { \
+- .esp0 = sizeof(init_stack) + (long)&init_stack, \
+- .ss0 = __KERNEL_DS, \
+- .ss1 = __KERNEL_CS, \
+- .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
++ .x86_tss = { \
++ .esp0 = sizeof(init_stack) + (long)&init_stack, \
++ .ss0 = __KERNEL_DS, \
++ .ss1 = __KERNEL_CS, \
++ .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
++ }, \
+ .io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
+ }
+
+@@ -551,38 +506,33 @@ static inline void rep_nop(void)
+
+ #define cpu_relax() rep_nop()
+
+-#define paravirt_enabled() 0
+-#define __cpuid xen_cpuid
+-
+ #ifndef CONFIG_X86_NO_TSS
+-static inline void __load_esp0(struct tss_struct *tss, struct thread_struct *thread)
++static inline void native_load_esp0(struct tss_struct *tss, struct thread_struct *thread)
+ {
+- tss->esp0 = thread->esp0;
++ tss->x86_tss.esp0 = thread->esp0;
+ /* This can only happen when SEP is enabled, no need to test "SEP"arately */
+- if (unlikely(tss->ss1 != thread->sysenter_cs)) {
+- tss->ss1 = thread->sysenter_cs;
++ if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) {
++ tss->x86_tss.ss1 = thread->sysenter_cs;
+ wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
+ }
+ }
+-#define load_esp0(tss, thread) \
+- __load_esp0(tss, thread)
+ #else
+-#define load_esp0(tss, thread) do { \
++#define xen_load_esp0(tss, thread) do { \
+ if (HYPERVISOR_stack_switch(__KERNEL_DS, (thread)->esp0)) \
+ BUG(); \
+ } while (0)
+ #endif
+
+
+-/*
+- * These special macros can be used to get or set a debugging register
+- */
+-#define get_debugreg(var, register) \
+- (var) = HYPERVISOR_get_debugreg(register)
+-#define set_debugreg(value, register) \
+- WARN_ON(HYPERVISOR_set_debugreg(register, value))
++static inline unsigned long xen_get_debugreg(int regno)
++{
++ return HYPERVISOR_get_debugreg(regno);
++}
+
+-#define set_iopl_mask xen_set_iopl_mask
++static inline void xen_set_debugreg(int regno, unsigned long value)
++{
++ WARN_ON(HYPERVISOR_set_debugreg(regno, value));
++}
+
+ /*
+ * Set IOPL bits in EFLAGS from given mask
+@@ -597,6 +547,21 @@ static inline void xen_set_iopl_mask(uns
+ }
+
+
++#define paravirt_enabled() 0
++#define __cpuid xen_cpuid
++
++#define load_esp0 xen_load_esp0
++
++/*
++ * These special macros can be used to get or set a debugging register
++ */
++#define get_debugreg(var, register) \
++ (var) = xen_get_debugreg(register)
++#define set_debugreg(value, register) \
++ xen_set_debugreg(register, value)
++
++#define set_iopl_mask xen_set_iopl_mask
++
+ /*
+ * Generic CPUID function
+ * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
+@@ -749,8 +714,14 @@ extern unsigned long boot_option_idle_ov
+ extern void enable_sep_cpu(void);
+ extern int sysenter_setup(void);
+
+-extern int init_gdt(int cpu, struct task_struct *idle);
++/* Defined in head.S */
++extern struct Xgt_desc_struct early_gdt_descr;
++
+ extern void cpu_set_gdt(int);
+-extern void secondary_cpu_init(void);
++extern void switch_to_new_gdt(void);
++extern void cpu_init(void);
++extern void init_gdt(int cpu);
++
++extern int force_mwait;
+
+ #endif /* __ASM_I386_PROCESSOR_H */
+--- a/include/asm-x86/mach-xen/asm/processor_64.h
++++ b/include/asm-x86/mach-xen/asm/processor_64.h
+@@ -20,6 +20,7 @@
+ #include <asm/percpu.h>
+ #include <linux/personality.h>
+ #include <linux/cpumask.h>
++#include <asm/processor-flags.h>
+
+ #define TF_MASK 0x00000100
+ #define IF_MASK 0x00000200
+@@ -103,42 +104,6 @@ extern unsigned int init_intel_cacheinfo
+ extern unsigned short num_cache_leaves;
+
+ /*
+- * EFLAGS bits
+- */
+-#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */
+-#define X86_EFLAGS_PF 0x00000004 /* Parity Flag */
+-#define X86_EFLAGS_AF 0x00000010 /* Auxillary carry Flag */
+-#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */
+-#define X86_EFLAGS_SF 0x00000080 /* Sign Flag */
+-#define X86_EFLAGS_TF 0x00000100 /* Trap Flag */
+-#define X86_EFLAGS_IF 0x00000200 /* Interrupt Flag */
+-#define X86_EFLAGS_DF 0x00000400 /* Direction Flag */
+-#define X86_EFLAGS_OF 0x00000800 /* Overflow Flag */
+-#define X86_EFLAGS_IOPL 0x00003000 /* IOPL mask */
+-#define X86_EFLAGS_NT 0x00004000 /* Nested Task */
+-#define X86_EFLAGS_RF 0x00010000 /* Resume Flag */
+-#define X86_EFLAGS_VM 0x00020000 /* Virtual Mode */
+-#define X86_EFLAGS_AC 0x00040000 /* Alignment Check */
+-#define X86_EFLAGS_VIF 0x00080000 /* Virtual Interrupt Flag */
+-#define X86_EFLAGS_VIP 0x00100000 /* Virtual Interrupt Pending */
+-#define X86_EFLAGS_ID 0x00200000 /* CPUID detection flag */
+-
+-/*
+- * Intel CPU features in CR4
+- */
+-#define X86_CR4_VME 0x0001 /* enable vm86 extensions */
+-#define X86_CR4_PVI 0x0002 /* virtual interrupts flag enable */
+-#define X86_CR4_TSD 0x0004 /* disable time stamp at ipl 3 */
+-#define X86_CR4_DE 0x0008 /* enable debugging extensions */
+-#define X86_CR4_PSE 0x0010 /* enable page size extensions */
+-#define X86_CR4_PAE 0x0020 /* enable physical address extensions */
+-#define X86_CR4_MCE 0x0040 /* Machine check enable */
+-#define X86_CR4_PGE 0x0080 /* enable global pages */
+-#define X86_CR4_PCE 0x0100 /* enable performance counters at ipl 3 */
+-#define X86_CR4_OSFXSR 0x0200 /* enable fast FPU save and restore */
+-#define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */
+-
+-/*
+ * Save the cr4 feature set we're using (ie
+ * Pentium 4MB enable and PPro Global page
+ * enable), so that any CPU's that boot up
+@@ -203,7 +168,7 @@ struct i387_fxsave_struct {
+ u32 mxcsr;
+ u32 mxcsr_mask;
+ u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
+- u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 128 bytes */
++ u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
+ u32 padding[24];
+ } __attribute__ ((aligned (16)));
+
+@@ -436,22 +401,6 @@ static inline void prefetchw(void *x)
+ #define cpu_relax() rep_nop()
+
+ /*
+- * NSC/Cyrix CPU configuration register indexes
+- */
+-#define CX86_CCR0 0xc0
+-#define CX86_CCR1 0xc1
+-#define CX86_CCR2 0xc2
+-#define CX86_CCR3 0xc3
+-#define CX86_CCR4 0xe8
+-#define CX86_CCR5 0xe9
+-#define CX86_CCR6 0xea
+-#define CX86_CCR7 0xeb
+-#define CX86_DIR0 0xfe
+-#define CX86_DIR1 0xff
+-#define CX86_ARR_BASE 0xc4
+-#define CX86_RCR_BASE 0xdc
+-
+-/*
+ * NSC/Cyrix CPU indexed register access macros
+ */
+
+--- a/include/asm-x86/mach-xen/asm/segment_32.h
++++ b/include/asm-x86/mach-xen/asm/segment_32.h
+@@ -39,7 +39,7 @@
+ * 25 - APM BIOS support
+ *
+ * 26 - ESPFIX small SS
+- * 27 - PDA [ per-cpu private data area ]
++ * 27 - per-cpu [ offset to per-cpu data area ]
+ * 28 - unused
+ * 29 - unused
+ * 30 - unused
+@@ -74,8 +74,12 @@
+ #define GDT_ENTRY_ESPFIX_SS (GDT_ENTRY_KERNEL_BASE + 14)
+ #define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8)
+
+-#define GDT_ENTRY_PDA (GDT_ENTRY_KERNEL_BASE + 15)
+-#define __KERNEL_PDA (GDT_ENTRY_PDA * 8)
++#define GDT_ENTRY_PERCPU (GDT_ENTRY_KERNEL_BASE + 15)
++#ifdef CONFIG_SMP
++#define __KERNEL_PERCPU (GDT_ENTRY_PERCPU * 8)
++#else
++#define __KERNEL_PERCPU 0
++#endif
+
+ #define GDT_ENTRY_DOUBLEFAULT_TSS 31
+
+--- a/include/asm-x86/mach-xen/asm/smp_32.h
++++ b/include/asm-x86/mach-xen/asm/smp_32.h
+@@ -8,19 +8,15 @@
+ #include <linux/kernel.h>
+ #include <linux/threads.h>
+ #include <linux/cpumask.h>
+-#include <asm/pda.h>
+ #endif
+
+-#ifdef CONFIG_X86_LOCAL_APIC
+-#ifndef __ASSEMBLY__
+-#include <asm/fixmap.h>
++#if defined(CONFIG_X86_LOCAL_APIC) && !defined(__ASSEMBLY__)
+ #include <asm/bitops.h>
+ #include <asm/mpspec.h>
++#include <asm/apic.h>
+ #ifdef CONFIG_X86_IO_APIC
+ #include <asm/io_apic.h>
+ #endif
+-#include <asm/apic.h>
+-#endif
+ #endif
+
+ #define BAD_APICID 0xFFu
+@@ -52,9 +48,76 @@ extern void cpu_exit_clear(void);
+ extern void cpu_uninit(void);
+ #endif
+
+-#ifndef CONFIG_PARAVIRT
++#ifndef CONFIG_XEN
++struct smp_ops
++{
++ void (*smp_prepare_boot_cpu)(void);
++ void (*smp_prepare_cpus)(unsigned max_cpus);
++ int (*cpu_up)(unsigned cpu);
++ void (*smp_cpus_done)(unsigned max_cpus);
++
++ void (*smp_send_stop)(void);
++ void (*smp_send_reschedule)(int cpu);
++ int (*smp_call_function_mask)(cpumask_t mask,
++ void (*func)(void *info), void *info,
++ int wait);
++};
++
++extern struct smp_ops smp_ops;
++
++static inline void smp_prepare_boot_cpu(void)
++{
++ smp_ops.smp_prepare_boot_cpu();
++}
++static inline void smp_prepare_cpus(unsigned int max_cpus)
++{
++ smp_ops.smp_prepare_cpus(max_cpus);
++}
++static inline int __cpu_up(unsigned int cpu)
++{
++ return smp_ops.cpu_up(cpu);
++}
++static inline void smp_cpus_done(unsigned int max_cpus)
++{
++ smp_ops.smp_cpus_done(max_cpus);
++}
++
++static inline void smp_send_stop(void)
++{
++ smp_ops.smp_send_stop();
++}
++static inline void smp_send_reschedule(int cpu)
++{
++ smp_ops.smp_send_reschedule(cpu);
++}
++static inline int smp_call_function_mask(cpumask_t mask,
++ void (*func) (void *info), void *info,
++ int wait)
++{
++ return smp_ops.smp_call_function_mask(mask, func, info, wait);
++}
++
++void native_smp_prepare_boot_cpu(void);
++void native_smp_prepare_cpus(unsigned int max_cpus);
++int native_cpu_up(unsigned int cpunum);
++void native_smp_cpus_done(unsigned int max_cpus);
++
+ #define startup_ipi_hook(phys_apicid, start_eip, start_esp) \
+ do { } while (0)
++
++#else
++
++
++void xen_smp_send_stop(void);
++void xen_smp_send_reschedule(int cpu);
++int xen_smp_call_function_mask(cpumask_t mask,
++ void (*func) (void *info), void *info,
++ int wait);
++
++#define smp_send_stop xen_smp_send_stop
++#define smp_send_reschedule xen_smp_send_reschedule
++#define smp_call_function_mask xen_smp_call_function_mask
++
+ #endif
+
+ /*
+@@ -62,7 +125,8 @@ do { } while (0)
+ * from the initial startup. We map APIC_BASE very early in page_setup(),
+ * so this is correct in the x86 case.
+ */
+-#define raw_smp_processor_id() (read_pda(cpu_number))
++DECLARE_PER_CPU(int, cpu_number);
++#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
+
+ extern cpumask_t cpu_possible_map;
+ #define cpu_callin_map cpu_possible_map
+@@ -73,20 +137,6 @@ static inline int num_booting_cpus(void)
+ return cpus_weight(cpu_possible_map);
+ }
+
+-#ifdef CONFIG_X86_LOCAL_APIC
+-
+-#ifdef APIC_DEFINITION
+-extern int hard_smp_processor_id(void);
+-#else
+-#include <mach_apicdef.h>
+-static inline int hard_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
+-}
+-#endif
+-#endif
+-
+ #define safe_smp_processor_id() smp_processor_id()
+ extern int __cpu_disable(void);
+ extern void __cpu_die(unsigned int cpu);
+@@ -102,10 +152,31 @@ extern unsigned int num_processors;
+
+ #define NO_PROC_ID 0xFF /* No processor magic marker */
+
+-#endif
++#endif /* CONFIG_SMP */
+
+ #ifndef __ASSEMBLY__
+
++#ifdef CONFIG_X86_LOCAL_APIC
++
++#ifdef APIC_DEFINITION
++extern int hard_smp_processor_id(void);
++#else
++#include <mach_apicdef.h>
++static inline int hard_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
++}
++#endif /* APIC_DEFINITION */
++
++#else /* CONFIG_X86_LOCAL_APIC */
++
++#ifndef CONFIG_SMP
++#define hard_smp_processor_id() 0
++#endif
++
++#endif /* CONFIG_X86_LOCAL_APIC */
++
+ extern u8 apicid_2_node[];
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+--- a/include/asm-x86/mach-xen/asm/smp_64.h
++++ b/include/asm-x86/mach-xen/asm/smp_64.h
+@@ -11,12 +11,11 @@
+ extern int disable_apic;
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+-#include <asm/fixmap.h>
+ #include <asm/mpspec.h>
++#include <asm/apic.h>
+ #ifdef CONFIG_X86_IO_APIC
+ #include <asm/io_apic.h>
+ #endif
+-#include <asm/apic.h>
+ #include <asm/thread_info.h>
+ #endif
+
+@@ -41,7 +40,6 @@ extern void lock_ipi_call_lock(void);
+ extern void unlock_ipi_call_lock(void);
+ extern int smp_num_siblings;
+ extern void smp_send_reschedule(int cpu);
+-void smp_stop_cpu(void);
+
+ extern cpumask_t cpu_sibling_map[NR_CPUS];
+ extern cpumask_t cpu_core_map[NR_CPUS];
+@@ -62,14 +60,6 @@ static inline int num_booting_cpus(void)
+
+ #define raw_smp_processor_id() read_pda(cpunumber)
+
+-#ifdef CONFIG_X86_LOCAL_APIC
+-static inline int hard_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
+-}
+-#endif
+-
+ extern int __cpu_disable(void);
+ extern void __cpu_die(unsigned int cpu);
+ extern void prefill_possible_map(void);
+@@ -78,6 +68,14 @@ extern unsigned __cpuinitdata disabled_c
+
+ #define NO_PROC_ID 0xFF /* No processor magic marker */
+
++#endif /* CONFIG_SMP */
++
++#ifdef CONFIG_X86_LOCAL_APIC
++static inline int hard_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
++}
+ #endif
+
+ /*
+--- a/include/asm-x86/mach-xen/asm/system_32.h
++++ b/include/asm-x86/mach-xen/asm/system_32.h
+@@ -4,7 +4,7 @@
+ #include <linux/kernel.h>
+ #include <asm/segment.h>
+ #include <asm/cpufeature.h>
+-#include <linux/bitops.h> /* for LOCK_PREFIX */
++#include <asm/cmpxchg.h>
+ #include <asm/synch_bitops.h>
+ #include <asm/hypervisor.h>
+
+@@ -90,308 +90,102 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t"
+ #define savesegment(seg, value) \
+ asm volatile("mov %%" #seg ",%0":"=rm" (value))
+
+-#define read_cr0() ({ \
+- unsigned int __dummy; \
+- __asm__ __volatile__( \
+- "movl %%cr0,%0\n\t" \
+- :"=r" (__dummy)); \
+- __dummy; \
+-})
+-#define write_cr0(x) \
+- __asm__ __volatile__("movl %0,%%cr0": :"r" (x))
+-
+-#define read_cr2() (current_vcpu_info()->arch.cr2)
+-#define write_cr2(x) \
+- __asm__ __volatile__("movl %0,%%cr2": :"r" (x))
+-
+-#define read_cr3() ({ \
+- unsigned int __dummy; \
+- __asm__ ( \
+- "movl %%cr3,%0\n\t" \
+- :"=r" (__dummy)); \
+- __dummy = xen_cr3_to_pfn(__dummy); \
+- mfn_to_pfn(__dummy) << PAGE_SHIFT; \
+-})
+-#define write_cr3(x) ({ \
+- unsigned int __dummy = pfn_to_mfn((x) >> PAGE_SHIFT); \
+- __dummy = xen_pfn_to_cr3(__dummy); \
+- __asm__ __volatile__("movl %0,%%cr3": :"r" (__dummy)); \
+-})
+-#define read_cr4() ({ \
+- unsigned int __dummy; \
+- __asm__( \
+- "movl %%cr4,%0\n\t" \
+- :"=r" (__dummy)); \
+- __dummy; \
+-})
+-#define read_cr4_safe() ({ \
+- unsigned int __dummy; \
+- /* This could fault if %cr4 does not exist */ \
+- __asm__("1: movl %%cr4, %0 \n" \
+- "2: \n" \
+- ".section __ex_table,\"a\" \n" \
+- ".long 1b,2b \n" \
+- ".previous \n" \
+- : "=r" (__dummy): "0" (0)); \
+- __dummy; \
+-})
+-
+-#define write_cr4(x) \
+- __asm__ __volatile__("movl %0,%%cr4": :"r" (x))
+-
+-#define wbinvd() \
+- __asm__ __volatile__ ("wbinvd": : :"memory")
+-
+-/* Clear the 'TS' bit */
+-#define clts() (HYPERVISOR_fpu_taskswitch(0))
+-
+-/* Set the 'TS' bit */
+-#define stts() (HYPERVISOR_fpu_taskswitch(1))
+-
+-#endif /* __KERNEL__ */
+-
+-static inline unsigned long get_limit(unsigned long segment)
++static inline void xen_clts(void)
+ {
+- unsigned long __limit;
+- __asm__("lsll %1,%0"
+- :"=r" (__limit):"r" (segment));
+- return __limit+1;
++ HYPERVISOR_fpu_taskswitch(0);
+ }
+
+-#define nop() __asm__ __volatile__ ("nop")
+-
+-#define xchg(ptr,v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr))))
+-
+-#define tas(ptr) (xchg((ptr),1))
+-
+-struct __xchg_dummy { unsigned long a[100]; };
+-#define __xg(x) ((struct __xchg_dummy *)(x))
++static inline unsigned long xen_read_cr0(void)
++{
++ unsigned long val;
++ asm volatile("movl %%cr0,%0\n\t" :"=r" (val));
++ return val;
++}
+
++static inline void xen_write_cr0(unsigned long val)
++{
++ asm volatile("movl %0,%%cr0": :"r" (val));
++}
+
+-#ifdef CONFIG_X86_CMPXCHG64
++#define xen_read_cr2() (current_vcpu_info()->arch.cr2)
+
+-/*
+- * The semantics of XCHGCMP8B are a bit strange, this is why
+- * there is a loop and the loading of %%eax and %%edx has to
+- * be inside. This inlines well in most cases, the cached
+- * cost is around ~38 cycles. (in the future we might want
+- * to do an SIMD/3DNOW!/MMX/FPU 64-bit store here, but that
+- * might have an implicit FPU-save as a cost, so it's not
+- * clear which path to go.)
+- *
+- * cmpxchg8b must be used with the lock prefix here to allow
+- * the instruction to be executed atomically, see page 3-102
+- * of the instruction set reference 24319102.pdf. We need
+- * the reader side to see the coherent 64bit value.
+- */
+-static inline void __set_64bit (unsigned long long * ptr,
+- unsigned int low, unsigned int high)
++static inline void xen_write_cr2(unsigned long val)
+ {
+- __asm__ __volatile__ (
+- "\n1:\t"
+- "movl (%0), %%eax\n\t"
+- "movl 4(%0), %%edx\n\t"
+- "lock cmpxchg8b (%0)\n\t"
+- "jnz 1b"
+- : /* no outputs */
+- : "D"(ptr),
+- "b"(low),
+- "c"(high)
+- : "ax","dx","memory");
++ asm volatile("movl %0,%%cr2": :"r" (val));
+ }
+
+-static inline void __set_64bit_constant (unsigned long long *ptr,
+- unsigned long long value)
++static inline unsigned long xen_read_cr3(void)
+ {
+- __set_64bit(ptr,(unsigned int)(value), (unsigned int)((value)>>32ULL));
++ unsigned long val;
++ asm volatile("movl %%cr3,%0\n\t" :"=r" (val));
++ return mfn_to_pfn(xen_cr3_to_pfn(val)) << PAGE_SHIFT;
+ }
+-#define ll_low(x) *(((unsigned int*)&(x))+0)
+-#define ll_high(x) *(((unsigned int*)&(x))+1)
+
+-static inline void __set_64bit_var (unsigned long long *ptr,
+- unsigned long long value)
++static inline void xen_write_cr3(unsigned long val)
+ {
+- __set_64bit(ptr,ll_low(value), ll_high(value));
++ val = xen_pfn_to_cr3(pfn_to_mfn(val >> PAGE_SHIFT));
++ asm volatile("movl %0,%%cr3": :"r" (val));
+ }
+
+-#define set_64bit(ptr,value) \
+-(__builtin_constant_p(value) ? \
+- __set_64bit_constant(ptr, value) : \
+- __set_64bit_var(ptr, value) )
+-
+-#define _set_64bit(ptr,value) \
+-(__builtin_constant_p(value) ? \
+- __set_64bit(ptr, (unsigned int)(value), (unsigned int)((value)>>32ULL) ) : \
+- __set_64bit(ptr, ll_low(value), ll_high(value)) )
+-
+-#endif
+-
+-/*
+- * Note: no "lock" prefix even on SMP: xchg always implies lock anyway
+- * Note 2: xchg has side effect, so that attribute volatile is necessary,
+- * but generally the primitive is invalid, *ptr is output argument. --ANK
+- */
+-static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
++static inline unsigned long xen_read_cr4(void)
+ {
+- switch (size) {
+- case 1:
+- __asm__ __volatile__("xchgb %b0,%1"
+- :"=q" (x)
+- :"m" (*__xg(ptr)), "0" (x)
+- :"memory");
+- break;
+- case 2:
+- __asm__ __volatile__("xchgw %w0,%1"
+- :"=r" (x)
+- :"m" (*__xg(ptr)), "0" (x)
+- :"memory");
+- break;
+- case 4:
+- __asm__ __volatile__("xchgl %0,%1"
+- :"=r" (x)
+- :"m" (*__xg(ptr)), "0" (x)
+- :"memory");
+- break;
+- }
+- return x;
++ unsigned long val;
++ asm volatile("movl %%cr4,%0\n\t" :"=r" (val));
++ return val;
+ }
+
+-/*
+- * Atomic compare and exchange. Compare OLD with MEM, if identical,
+- * store NEW in MEM. Return the initial value in MEM. Success is
+- * indicated by comparing RETURN with OLD.
+- */
+-
+-#ifdef CONFIG_X86_CMPXCHG
+-#define __HAVE_ARCH_CMPXCHG 1
+-#define cmpxchg(ptr,o,n)\
+- ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
+- (unsigned long)(n),sizeof(*(ptr))))
+-#define sync_cmpxchg(ptr,o,n)\
+- ((__typeof__(*(ptr)))__sync_cmpxchg((ptr),(unsigned long)(o),\
+- (unsigned long)(n),sizeof(*(ptr))))
+-#endif
++static inline unsigned long xen_read_cr4_safe(void)
++{
++ unsigned long val;
++ /* This could fault if %cr4 does not exist */
++ asm("1: movl %%cr4, %0 \n"
++ "2: \n"
++ ".section __ex_table,\"a\" \n"
++ ".long 1b,2b \n"
++ ".previous \n"
++ : "=r" (val): "0" (0));
++ return val;
++}
+
+-static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
+- unsigned long new, int size)
++static inline void xen_write_cr4(unsigned long val)
+ {
+- unsigned long prev;
+- switch (size) {
+- case 1:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
+- : "=a"(prev)
+- : "q"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- case 2:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
+- : "=a"(prev)
+- : "r"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- case 4:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
+- : "=a"(prev)
+- : "r"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- }
+- return old;
++ asm volatile("movl %0,%%cr4": :"r" (val));
+ }
+
+-/*
+- * Always use locked operations when touching memory shared with a
+- * hypervisor, since the system may be SMP even if the guest kernel
+- * isn't.
+- */
+-static inline unsigned long __sync_cmpxchg(volatile void *ptr,
+- unsigned long old,
+- unsigned long new, int size)
+-{
+- unsigned long prev;
+- switch (size) {
+- case 1:
+- __asm__ __volatile__("lock; cmpxchgb %b1,%2"
+- : "=a"(prev)
+- : "q"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- case 2:
+- __asm__ __volatile__("lock; cmpxchgw %w1,%2"
+- : "=a"(prev)
+- : "r"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- case 4:
+- __asm__ __volatile__("lock; cmpxchgl %1,%2"
+- : "=a"(prev)
+- : "r"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- }
+- return old;
++static inline void xen_wbinvd(void)
++{
++ asm volatile("wbinvd": : :"memory");
+ }
+
+-#ifndef CONFIG_X86_CMPXCHG
+-/*
+- * Building a kernel capable running on 80386. It may be necessary to
+- * simulate the cmpxchg on the 80386 CPU. For that purpose we define
+- * a function for each of the sizes we support.
+- */
++#define read_cr0() (xen_read_cr0())
++#define write_cr0(x) (xen_write_cr0(x))
++#define read_cr2() (xen_read_cr2())
++#define write_cr2(x) (xen_write_cr2(x))
++#define read_cr3() (xen_read_cr3())
++#define write_cr3(x) (xen_write_cr3(x))
++#define read_cr4() (xen_read_cr4())
++#define read_cr4_safe() (xen_read_cr4_safe())
++#define write_cr4(x) (xen_write_cr4(x))
++#define wbinvd() (xen_wbinvd())
+
+-extern unsigned long cmpxchg_386_u8(volatile void *, u8, u8);
+-extern unsigned long cmpxchg_386_u16(volatile void *, u16, u16);
+-extern unsigned long cmpxchg_386_u32(volatile void *, u32, u32);
+-
+-static inline unsigned long cmpxchg_386(volatile void *ptr, unsigned long old,
+- unsigned long new, int size)
+-{
+- switch (size) {
+- case 1:
+- return cmpxchg_386_u8(ptr, old, new);
+- case 2:
+- return cmpxchg_386_u16(ptr, old, new);
+- case 4:
+- return cmpxchg_386_u32(ptr, old, new);
+- }
+- return old;
+-}
+-
+-#define cmpxchg(ptr,o,n) \
+-({ \
+- __typeof__(*(ptr)) __ret; \
+- if (likely(boot_cpu_data.x86 > 3)) \
+- __ret = __cmpxchg((ptr), (unsigned long)(o), \
+- (unsigned long)(n), sizeof(*(ptr))); \
+- else \
+- __ret = cmpxchg_386((ptr), (unsigned long)(o), \
+- (unsigned long)(n), sizeof(*(ptr))); \
+- __ret; \
+-})
+-#endif
++/* Clear the 'TS' bit */
++#define clts() (xen_clts())
+
+-#ifdef CONFIG_X86_CMPXCHG64
++/* Set the 'TS' bit */
++#define stts() (HYPERVISOR_fpu_taskswitch(1))
+
+-static inline unsigned long long __cmpxchg64(volatile void *ptr, unsigned long long old,
+- unsigned long long new)
++#endif /* __KERNEL__ */
++
++static inline unsigned long get_limit(unsigned long segment)
+ {
+- unsigned long long prev;
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchg8b %3"
+- : "=A"(prev)
+- : "b"((unsigned long)new),
+- "c"((unsigned long)(new >> 32)),
+- "m"(*__xg(ptr)),
+- "0"(old)
+- : "memory");
+- return prev;
+-}
+-
+-#define cmpxchg64(ptr,o,n)\
+- ((__typeof__(*(ptr)))__cmpxchg64((ptr),(unsigned long long)(o),\
+- (unsigned long long)(n)))
++ unsigned long __limit;
++ __asm__("lsll %1,%0"
++ :"=r" (__limit):"r" (segment));
++ return __limit+1;
++}
++
++#define nop() __asm__ __volatile__ ("nop")
+
+-#endif
+-
+ /*
+ * Force strict CPU ordering.
+ * And yes, this is required on UP too when we're talking
+--- a/include/asm-x86/mach-xen/asm/system_64.h
++++ b/include/asm-x86/mach-xen/asm/system_64.h
+@@ -3,7 +3,7 @@
+
+ #include <linux/kernel.h>
+ #include <asm/segment.h>
+-#include <asm/alternative.h>
++#include <asm/cmpxchg.h>
+
+ #include <asm/synch_bitops.h>
+ #include <asm/hypervisor.h>
+@@ -43,7 +43,7 @@
+ [threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \
+ [ti_flags] "i" (offsetof(struct thread_info, flags)),\
+ [tif_fork] "i" (TIF_FORK), \
+- [thread_info] "i" (offsetof(struct task_struct, thread_info)), \
++ [thread_info] "i" (offsetof(struct task_struct, stack)), \
+ [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \
+ : "memory", "cc" __EXTRA_CLOBBER)
+
+@@ -92,6 +92,12 @@ static inline void write_cr0(unsigned lo
+ machine_to_phys(__dummy); \
+ })
+
++static inline void write_cr3(unsigned long val)
++{
++ val = phys_to_machine(val);
++ asm volatile("movq %0,%%cr3" :: "r" (val) : "memory");
++}
++
+ static inline unsigned long read_cr4(void)
+ {
+ unsigned long cr4;
+@@ -101,7 +107,7 @@ static inline unsigned long read_cr4(voi
+
+ static inline void write_cr4(unsigned long val)
+ {
+- asm volatile("movq %0,%%cr4" :: "r" (val));
++ asm volatile("movq %0,%%cr4" :: "r" (val) : "memory");
+ }
+
+ #define stts() (HYPERVISOR_fpu_taskswitch(1))
+@@ -122,100 +128,6 @@ static inline void sched_cacheflush(void
+
+ #define nop() __asm__ __volatile__ ("nop")
+
+-#define xchg(ptr,v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr))))
+-
+-#define tas(ptr) (xchg((ptr),1))
+-
+-#define __xg(x) ((volatile long *)(x))
+-
+-static inline void set_64bit(volatile unsigned long *ptr, unsigned long val)
+-{
+- *ptr = val;
+-}
+-
+-#define _set_64bit set_64bit
+-
+-/*
+- * Note: no "lock" prefix even on SMP: xchg always implies lock anyway
+- * Note 2: xchg has side effect, so that attribute volatile is necessary,
+- * but generally the primitive is invalid, *ptr is output argument. --ANK
+- */
+-static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+-{
+- switch (size) {
+- case 1:
+- __asm__ __volatile__("xchgb %b0,%1"
+- :"=q" (x)
+- :"m" (*__xg(ptr)), "0" (x)
+- :"memory");
+- break;
+- case 2:
+- __asm__ __volatile__("xchgw %w0,%1"
+- :"=r" (x)
+- :"m" (*__xg(ptr)), "0" (x)
+- :"memory");
+- break;
+- case 4:
+- __asm__ __volatile__("xchgl %k0,%1"
+- :"=r" (x)
+- :"m" (*__xg(ptr)), "0" (x)
+- :"memory");
+- break;
+- case 8:
+- __asm__ __volatile__("xchgq %0,%1"
+- :"=r" (x)
+- :"m" (*__xg(ptr)), "0" (x)
+- :"memory");
+- break;
+- }
+- return x;
+-}
+-
+-/*
+- * Atomic compare and exchange. Compare OLD with MEM, if identical,
+- * store NEW in MEM. Return the initial value in MEM. Success is
+- * indicated by comparing RETURN with OLD.
+- */
+-
+-#define __HAVE_ARCH_CMPXCHG 1
+-
+-static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
+- unsigned long new, int size)
+-{
+- unsigned long prev;
+- switch (size) {
+- case 1:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
+- : "=a"(prev)
+- : "q"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- case 2:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
+- : "=a"(prev)
+- : "r"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- case 4:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %k1,%2"
+- : "=a"(prev)
+- : "r"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- case 8:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgq %1,%2"
+- : "=a"(prev)
+- : "r"(new), "m"(*__xg(ptr)), "0"(old)
+- : "memory");
+- return prev;
+- }
+- return old;
+-}
+-
+-#define cmpxchg(ptr,o,n)\
+- ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
+- (unsigned long)(n),sizeof(*(ptr))))
+-
+ #ifdef CONFIG_SMP
+ #define smp_mb() mb()
+ #define smp_rmb() rmb()
+--- a/include/asm-x86/mach-xen/asm/tlbflush_32.h
++++ b/include/asm-x86/mach-xen/asm/tlbflush_32.h
+@@ -29,8 +29,13 @@
+ * and page-granular flushes are available only on i486 and up.
+ */
+
++#define TLB_FLUSH_ALL 0xffffffff
++
++
+ #ifndef CONFIG_SMP
+
++#include <linux/sched.h>
++
+ #define flush_tlb() __flush_tlb()
+ #define flush_tlb_all() __flush_tlb_all()
+ #define local_flush_tlb() __flush_tlb()
+@@ -55,7 +60,7 @@ static inline void flush_tlb_range(struc
+ __flush_tlb();
+ }
+
+-#else
++#else /* SMP */
+
+ #include <asm/smp.h>
+
+@@ -84,9 +89,7 @@ struct tlb_state
+ char __cacheline_padding[L1_CACHE_BYTES-8];
+ };
+ DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
+-
+-
+-#endif
++#endif /* SMP */
+
+ #define flush_tlb_kernel_range(start, end) flush_tlb_all()
+
+--- a/include/asm-x86/mach-xen/asm/tlbflush_64.h
++++ b/include/asm-x86/mach-xen/asm/tlbflush_64.h
+@@ -2,7 +2,9 @@
+ #define _X8664_TLBFLUSH_H
+
+ #include <linux/mm.h>
++#include <linux/sched.h>
+ #include <asm/processor.h>
++#include <asm/system.h>
+
+ #define __flush_tlb() xen_tlb_flush()
+
+--- a/include/linux/pci.h
++++ b/include/linux/pci.h
+@@ -239,7 +239,7 @@ struct pci_dev {
+ int rom_attr_enabled; /* has display of the rom attribute been enabled? */
+ struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
+ struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
+-#ifdef CONFIG_PCI_MSI
++#if defined(CONFIG_PCI_MSI) && !defined(CONFIG_XEN)
+ struct list_head msi_list;
+ #endif
+ struct pci_vpd *vpd;
+--- a/lib/swiotlb-xen.c
++++ b/lib/swiotlb-xen.c
+@@ -723,7 +723,6 @@ swiotlb_dma_supported (struct device *hw
+ return (mask >= ((1UL << dma_bits) - 1));
+ }
+
+-EXPORT_SYMBOL(swiotlb_init);
+ EXPORT_SYMBOL(swiotlb_map_single);
+ EXPORT_SYMBOL(swiotlb_unmap_single);
+ EXPORT_SYMBOL(swiotlb_map_sg);
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -1744,12 +1744,17 @@ static struct netdev_queue *dev_pick_tx(
+ inline int skb_checksum_setup(struct sk_buff *skb)
+ {
+ if (skb->proto_csum_blank) {
++ struct iphdr *iph;
++ unsigned char *th;
++
+ if (skb->protocol != htons(ETH_P_IP))
+ goto out;
+- skb->h.raw = (unsigned char *)skb->nh.iph + 4*skb->nh.iph->ihl;
+- if (skb->h.raw >= skb->tail)
++ iph = ip_hdr(skb);
++ th = skb_network_header(skb) + 4 * iph->ihl;
++ if (th >= skb_tail_pointer(skb))
+ goto out;
+- switch (skb->nh.iph->protocol) {
++ skb->csum_start = th - skb->head;
++ switch (iph->protocol) {
+ case IPPROTO_TCP:
+ skb->csum_offset = offsetof(struct tcphdr, check);
+ break;
+@@ -1760,10 +1765,10 @@ inline int skb_checksum_setup(struct sk_
+ if (net_ratelimit())
+ printk(KERN_ERR "Attempting to checksum a non-"
+ "TCP/UDP packet, dropping a protocol"
+- " %d packet", skb->nh.iph->protocol);
++ " %d packet", iph->protocol);
+ goto out;
+ }
+- if ((skb->h.raw + skb->csum_offset + 2) > skb->tail)
++ if ((th + skb->csum_offset + 2) > skb_tail_pointer(skb))
+ goto out;
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->proto_csum_blank = 0;
+--- a/scripts/Makefile.xen.awk
++++ b/scripts/Makefile.xen.awk
+@@ -13,7 +13,7 @@ BEGIN {
+ next
+ }
+
+-/:[[:space:]]*%\.[cS][[:space:]]/ {
++/:[[:space:]]*\$\(src\)\/%\.[cS][[:space:]]/ {
+ line = gensub(/%.([cS])/, "%-xen.\\1", "g", $0)
+ line = gensub(/(single-used-m)/, "xen-\\1", "g", line)
+ print line
--- /dev/null
+From: www.kernel.org
+Subject: Update to 2.6.23
+Patch-mainline: 2.6.23
+
+Automatically created from "patches.kernel.org/patch-2.6.23" by xen-port-patches.py
+
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-12-01/arch/x86/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Makefile 2008-12-01 11:11:08.000000000 +0100
++++ head-2008-12-01/arch/x86/Makefile 2008-12-01 11:36:47.000000000 +0100
+@@ -148,7 +148,7 @@ libs-y += arch/x86/lib/
+ core-y += $(fcore-y)
+
+ # Xen paravirtualization support
+-core-$(CONFIG_XEN) += arch/x86/xen/
++core-$(CONFIG_PARAVIRT_XEN) += arch/x86/xen/
+
+ # lguest paravirtualization support
+ core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
+Index: head-2008-12-01/arch/x86/kernel/acpi/sleep_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/sleep_32-xen.c 2008-04-15 09:29:41.000000000 +0200
++++ head-2008-12-01/arch/x86/kernel/acpi/sleep_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -15,7 +15,7 @@
+ #ifndef CONFIG_ACPI_PV_SLEEP
+ /* address in low memory of the wakeup routine. */
+ unsigned long acpi_wakeup_address = 0;
+-unsigned long acpi_video_flags;
++unsigned long acpi_realmode_flags;
+ extern char wakeup_start, wakeup_end;
+
+ extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
+@@ -74,9 +74,11 @@ static int __init acpi_sleep_setup(char
+ {
+ while ((str != NULL) && (*str != '\0')) {
+ if (strncmp(str, "s3_bios", 7) == 0)
+- acpi_video_flags = 1;
++ acpi_realmode_flags |= 1;
+ if (strncmp(str, "s3_mode", 7) == 0)
+- acpi_video_flags |= 2;
++ acpi_realmode_flags |= 2;
++ if (strncmp(str, "s3_beep", 7) == 0)
++ acpi_realmode_flags |= 4;
+ str = strchr(str, ',');
+ if (str != NULL)
+ str += strspn(str, ", \t");
+@@ -86,9 +88,11 @@ static int __init acpi_sleep_setup(char
+
+ __setup("acpi_sleep=", acpi_sleep_setup);
+
++/* Ouch, we want to delete this. We already have better version in userspace, in
++ s2ram from suspend.sf.net project */
+ static __init int reset_videomode_after_s3(struct dmi_system_id *d)
+ {
+- acpi_video_flags |= 2;
++ acpi_realmode_flags |= 2;
+ return 0;
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/asm-offsets_32.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/asm-offsets_32.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/asm-offsets_32.c 2008-12-01 11:36:47.000000000 +0100
+@@ -19,7 +19,9 @@
+ #include <asm/bootparam.h>
+ #include <asm/elf.h>
+
++#if defined(CONFIG_XEN) || defined(CONFIG_PARAVIRT_XEN)
+ #include <xen/interface/xen.h>
++#endif
+
+ #include <linux/lguest.h>
+ #include "../../../drivers/lguest/lg.h"
+@@ -121,7 +123,7 @@ void foo(void)
+ OFFSET(PV_CPU_read_cr0, pv_cpu_ops, read_cr0);
+ #endif
+
+-#ifdef CONFIG_XEN
++#ifdef CONFIG_PARAVIRT_XEN
+ BLANK();
+ OFFSET(XEN_vcpu_info_mask, vcpu_info, evtchn_upcall_mask);
+ OFFSET(XEN_vcpu_info_pending, vcpu_info, evtchn_upcall_pending);
+Index: head-2008-12-01/arch/x86/kernel/cpu/common-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -360,6 +360,8 @@ static void __cpuinit generic_identify(s
+ if ( xlvl >= 0x80000004 )
+ get_model_name(c); /* Default name */
+ }
++
++ init_scattered_cpuid_features(c);
+ }
+
+ early_intel_workaround(c);
+@@ -611,7 +613,6 @@ extern int nsc_init_cpu(void);
+ extern int amd_init_cpu(void);
+ extern int centaur_init_cpu(void);
+ extern int transmeta_init_cpu(void);
+-extern int rise_init_cpu(void);
+ extern int nexgen_init_cpu(void);
+ extern int umc_init_cpu(void);
+
+@@ -623,7 +624,6 @@ void __init early_cpu_init(void)
+ amd_init_cpu();
+ centaur_init_cpu();
+ transmeta_init_cpu();
+- rise_init_cpu();
+ nexgen_init_cpu();
+ umc_init_cpu();
+ early_cpu_detect();
+Index: head-2008-12-01/arch/x86/kernel/cpu/mtrr/main-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/mtrr/main-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/mtrr/main-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -167,7 +167,7 @@ mtrr_del(int reg, unsigned long base, un
+ EXPORT_SYMBOL(mtrr_add);
+ EXPORT_SYMBOL(mtrr_del);
+
+-__init void mtrr_bp_init(void)
++void __init mtrr_bp_init(void)
+ {
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/e820_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/e820_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/e820_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -10,6 +10,7 @@
+ #include <linux/efi.h>
+ #include <linux/pfn.h>
+ #include <linux/uaccess.h>
++#include <linux/suspend.h>
+
+ #include <asm/pgtable.h>
+ #include <asm/page.h>
+@@ -343,6 +344,37 @@ static int __init request_standard_resou
+
+ subsys_initcall(request_standard_resources);
+
++#if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
++/**
++ * e820_mark_nosave_regions - Find the ranges of physical addresses that do not
++ * correspond to e820 RAM areas and mark the corresponding pages as nosave for
++ * hibernation.
++ *
++ * This function requires the e820 map to be sorted and without any
++ * overlapping entries and assumes the first e820 area to be RAM.
++ */
++void __init e820_mark_nosave_regions(void)
++{
++ int i;
++ unsigned long pfn;
++
++ pfn = PFN_DOWN(e820.map[0].addr + e820.map[0].size);
++ for (i = 1; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++
++ if (pfn < PFN_UP(ei->addr))
++ register_nosave_region(pfn, PFN_UP(ei->addr));
++
++ pfn = PFN_DOWN(ei->addr + ei->size);
++ if (ei->type != E820_RAM)
++ register_nosave_region(PFN_UP(ei->addr), pfn);
++
++ if (pfn >= max_low_pfn)
++ break;
++ }
++}
++#endif
++
+ void __init add_memory_region(unsigned long long start,
+ unsigned long long size, int type)
+ {
+@@ -804,7 +836,7 @@ void __init print_memory_map(char *who)
+ case E820_NVS:
+ printk("(ACPI NVS)\n");
+ break;
+- default: printk("type %lu\n", e820.map[i].type);
++ default: printk("type %u\n", e820.map[i].type);
+ break;
+ }
+ }
+Index: head-2008-12-01/arch/x86/kernel/entry_32.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_32.S 2008-12-01 11:21:02.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_32.S 2008-12-01 11:36:47.000000000 +0100
+@@ -1112,7 +1112,7 @@ ENTRY(kernel_thread_helper)
+ CFI_ENDPROC
+ ENDPROC(kernel_thread_helper)
+
+-#ifdef CONFIG_XEN
++#ifdef CONFIG_PARAVIRT_XEN
+ /* Xen doesn't set %esp to be precisely what the normal sysenter
+ entrypoint expects, so fix it up before using the normal path. */
+ ENTRY(xen_sysenter_target)
+@@ -1205,7 +1205,7 @@ ENTRY(xen_failsafe_callback)
+ .previous
+ ENDPROC(xen_failsafe_callback)
+
+-#endif /* CONFIG_XEN */
++#endif /* CONFIG_PARAVIRT_XEN */
+
+ #ifdef CONFIG_FTRACE
+ #ifdef CONFIG_DYNAMIC_FTRACE
+Index: head-2008-12-01/arch/x86/kernel/entry_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:36:47.000000000 +0100
+@@ -452,9 +452,6 @@ restore_nocheck_notrace:
+ 1: INTERRUPT_RETURN
+ .section .fixup,"ax"
+ iret_exc:
+-#ifndef CONFIG_XEN
+- ENABLE_INTERRUPTS(CLBR_NONE)
+-#endif
+ pushl $0 # no error code
+ pushl $do_iret_error
+ jmp error_code
+Index: head-2008-12-01/arch/x86/kernel/head_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head_32-xen.S 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head_32-xen.S 2008-12-01 11:36:47.000000000 +0100
+@@ -86,7 +86,10 @@ ENTRY(_stext)
+ /*
+ * BSS section
+ */
+-.section ".bss.page_aligned","w"
++.section ".bss.page_aligned","wa"
++ .align PAGE_SIZE_asm
++ENTRY(swapper_pg_pmd)
++ .fill 1024,4,0
+ ENTRY(empty_zero_page)
+ .fill 4096,1,0
+
+@@ -136,25 +139,25 @@ ENTRY(empty_zero_page)
+ #endif /* CONFIG_XEN_COMPAT <= 0x030002 */
+
+
+- ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "linux")
+- ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, "2.6")
+- ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0")
+- ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .long, __PAGE_OFFSET)
++ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux")
++ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6")
++ ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0")
++ ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .long __PAGE_OFFSET)
+ #if CONFIG_XEN_COMPAT <= 0x030002
+- ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long, __PAGE_OFFSET)
++ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long __PAGE_OFFSET)
+ #else
+- ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long, 0)
++ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long 0)
+ #endif
+- ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .long, startup_32)
+- ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .long, hypercall_page)
+- ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, .long, HYPERVISOR_VIRT_START)
+- ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
++ ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .long startup_32)
++ ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .long hypercall_page)
++ ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, .long HYPERVISOR_VIRT_START)
++ ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
+ #ifdef CONFIG_X86_PAE
+- ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "yes")
+- ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .quad, _PAGE_PRESENT,_PAGE_PRESENT)
++ ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes")
++ ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .quad _PAGE_PRESENT, _PAGE_PRESENT)
+ #else
+- ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "no")
+- ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .long, _PAGE_PRESENT,_PAGE_PRESENT)
++ ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "no")
++ ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .long _PAGE_PRESENT, _PAGE_PRESENT)
+ #endif
+- ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic")
+- ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long, 1)
++ ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic")
++ ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
+Index: head-2008-12-01/arch/x86/kernel/init_task-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/init_task-xen.c 2007-06-12 13:12:48.000000000 +0200
++++ head-2008-12-01/arch/x86/kernel/init_task-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -46,6 +46,6 @@ EXPORT_SYMBOL(init_task);
+ * per-CPU TSS segments. Threads are completely 'soft' on Linux,
+ * no more per-task TSS's.
+ */
+-DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS;
++DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;
+ #endif
+
+Index: head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -402,14 +402,6 @@ static void set_ioapic_affinity_irq(unsi
+ # include <linux/slab.h> /* kmalloc() */
+ # include <linux/timer.h> /* time_after() */
+
+-#ifdef CONFIG_BALANCED_IRQ_DEBUG
+-# define TDprintk(x...) do { printk("<%ld:%s:%d>: ", jiffies, __FILE__, __LINE__); printk(x); } while (0)
+-# define Dprintk(x...) do { TDprintk(x); } while (0)
+-# else
+-# define TDprintk(x...)
+-# define Dprintk(x...)
+-# endif
+-
+ #define IRQBALANCE_CHECK_ARCH -999
+ #define MAX_BALANCED_IRQ_INTERVAL (5*HZ)
+ #define MIN_BALANCED_IRQ_INTERVAL (HZ/2)
+@@ -492,7 +484,7 @@ static inline void balance_irq(int cpu,
+ static inline void rotate_irqs_among_cpus(unsigned long useful_load_threshold)
+ {
+ int i, j;
+- Dprintk("Rotating IRQs among CPUs.\n");
++
+ for_each_online_cpu(i) {
+ for (j = 0; j < NR_IRQS; j++) {
+ if (!irq_desc[j].action)
+@@ -609,19 +601,11 @@ tryanothercpu:
+ max_loaded = tmp_loaded; /* processor */
+ imbalance = (max_cpu_irq - min_cpu_irq) / 2;
+
+- Dprintk("max_loaded cpu = %d\n", max_loaded);
+- Dprintk("min_loaded cpu = %d\n", min_loaded);
+- Dprintk("max_cpu_irq load = %ld\n", max_cpu_irq);
+- Dprintk("min_cpu_irq load = %ld\n", min_cpu_irq);
+- Dprintk("load imbalance = %lu\n", imbalance);
+-
+ /* if imbalance is less than approx 10% of max load, then
+ * observe diminishing returns action. - quit
+ */
+- if (imbalance < (max_cpu_irq >> 3)) {
+- Dprintk("Imbalance too trivial\n");
++ if (imbalance < (max_cpu_irq >> 3))
+ goto not_worth_the_effort;
+- }
+
+ tryanotherirq:
+ /* if we select an IRQ to move that can't go where we want, then
+@@ -678,9 +662,6 @@ tryanotherirq:
+ cpus_and(tmp, target_cpu_mask, allowed_mask);
+
+ if (!cpus_empty(tmp)) {
+-
+- Dprintk("irq = %d moved to cpu = %d\n",
+- selected_irq, min_loaded);
+ /* mark for change destination */
+ set_pending_irq(selected_irq, cpumask_of_cpu(min_loaded));
+
+@@ -700,7 +681,6 @@ not_worth_the_effort:
+ */
+ balanced_irq_interval = min((long)MAX_BALANCED_IRQ_INTERVAL,
+ balanced_irq_interval + BALANCED_IRQ_MORE_DELTA);
+- Dprintk("IRQ worth rotating not found\n");
+ return;
+ }
+
+@@ -716,6 +696,7 @@ static int balanced_irq(void *unused)
+ set_pending_irq(i, cpumask_of_cpu(0));
+ }
+
++ set_freezable();
+ for ( ; ; ) {
+ time_remaining = schedule_timeout_interruptible(time_remaining);
+ try_to_freeze();
+@@ -825,14 +806,6 @@ static int pirq_entries [MAX_PIRQS];
+ static int pirqs_enabled;
+ int skip_ioapic_setup;
+
+-static int __init ioapic_setup(char *str)
+-{
+- skip_ioapic_setup = 1;
+- return 1;
+-}
+-
+-__setup("noapic", ioapic_setup);
+-
+ static int __init ioapic_pirq_setup(char *str)
+ {
+ int i, max;
+@@ -1323,12 +1296,15 @@ static struct irq_chip ioapic_chip;
+ static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
+ {
+ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+- trigger == IOAPIC_LEVEL)
++ trigger == IOAPIC_LEVEL) {
++ irq_desc[irq].status |= IRQ_LEVEL;
+ set_irq_chip_and_handler_name(irq, &ioapic_chip,
+ handle_fasteoi_irq, "fasteoi");
+- else
++ } else {
++ irq_desc[irq].status &= ~IRQ_LEVEL;
+ set_irq_chip_and_handler_name(irq, &ioapic_chip,
+ handle_edge_irq, "edge");
++ }
+ set_intr_gate(vector, interrupt[irq]);
+ }
+ #else
+@@ -1957,7 +1933,7 @@ __setup("no_timer_check", notimercheck);
+ * - if this function detects that timer IRQs are defunct, then we fall
+ * back to ISA timer IRQs
+ */
+-int __init timer_irq_works(void)
++static int __init timer_irq_works(void)
+ {
+ unsigned long t1 = jiffies;
+
+Index: head-2008-12-01/arch/x86/kernel/irq_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -21,7 +21,7 @@
+ #include <asm/apic.h>
+ #include <asm/uaccess.h>
+
+-DEFINE_PER_CPU(irq_cpustat_t, irq_stat) ____cacheline_internodealigned_in_smp;
++DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
+ EXPORT_PER_CPU_SYMBOL(irq_stat);
+
+ DEFINE_PER_CPU(struct pt_regs *, irq_regs);
+@@ -149,15 +149,11 @@ fastcall unsigned int do_IRQ(struct pt_r
+
+ #ifdef CONFIG_4KSTACKS
+
+-/*
+- * These should really be __section__(".bss.page_aligned") as well, but
+- * gcc's 3.0 and earlier don't handle that correctly.
+- */
+ static char softirq_stack[NR_CPUS * THREAD_SIZE]
+- __attribute__((__aligned__(THREAD_SIZE)));
++ __attribute__((__section__(".bss.page_aligned")));
+
+ static char hardirq_stack[NR_CPUS * THREAD_SIZE]
+- __attribute__((__aligned__(THREAD_SIZE)));
++ __attribute__((__section__(".bss.page_aligned")));
+
+ /*
+ * allocate per-cpu stacks for hardirq and for softirq processing
+Index: head-2008-12-01/arch/x86/kernel/microcode-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/microcode-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/microcode-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -33,6 +33,7 @@
+ #include <linux/miscdevice.h>
+ #include <linux/spinlock.h>
+ #include <linux/mm.h>
++#include <linux/fs.h>
+ #include <linux/mutex.h>
+ #include <linux/cpu.h>
+ #include <linux/firmware.h>
+Index: head-2008-12-01/arch/x86/kernel/pci-dma-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -24,7 +24,7 @@
+ #include <asm/bug.h>
+
+ #ifdef __x86_64__
+-#include <asm/proto.h>
++#include <asm/iommu.h>
+
+ int iommu_merge __read_mostly = 0;
+ EXPORT_SYMBOL(iommu_merge);
+Index: head-2008-12-01/arch/x86/kernel/process_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -241,6 +241,7 @@ early_param("idle", idle_setup);
+ void show_regs(struct pt_regs * regs)
+ {
+ unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
++ unsigned long d0, d1, d2, d3, d6, d7;
+
+ printk("\n");
+ printk("Pid: %d, comm: %20s\n", current->pid, current->comm);
+@@ -265,6 +266,17 @@ void show_regs(struct pt_regs * regs)
+ cr3 = read_cr3();
+ cr4 = read_cr4_safe();
+ printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n", cr0, cr2, cr3, cr4);
++
++ get_debugreg(d0, 0);
++ get_debugreg(d1, 1);
++ get_debugreg(d2, 2);
++ get_debugreg(d3, 3);
++ printk("DR0: %08lx DR1: %08lx DR2: %08lx DR3: %08lx\n",
++ d0, d1, d2, d3);
++ get_debugreg(d6, 6);
++ get_debugreg(d7, 7);
++ printk("DR6: %08lx DR7: %08lx\n", d6, d7);
++
+ show_trace(NULL, regs, ®s->esp);
+ }
+
+@@ -473,7 +485,30 @@ int dump_task_regs(struct task_struct *t
+ return 1;
+ }
+
+-static noinline void __switch_to_xtra(struct task_struct *next_p)
++#ifdef CONFIG_SECCOMP
++void hard_disable_TSC(void)
++{
++ write_cr4(read_cr4() | X86_CR4_TSD);
++}
++void disable_TSC(void)
++{
++ preempt_disable();
++ if (!test_and_set_thread_flag(TIF_NOTSC))
++ /*
++ * Must flip the CPU state synchronously with
++ * TIF_NOTSC in the current running context.
++ */
++ hard_disable_TSC();
++ preempt_enable();
++}
++void hard_enable_TSC(void)
++{
++ write_cr4(read_cr4() & ~X86_CR4_TSD);
++}
++#endif /* CONFIG_SECCOMP */
++
++static noinline void
++__switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p)
+ {
+ struct thread_struct *next;
+
+@@ -488,33 +523,17 @@ static noinline void __switch_to_xtra(st
+ set_debugreg(next->debugreg[6], 6);
+ set_debugreg(next->debugreg[7], 7);
+ }
+-}
+
+-/*
+- * This function selects if the context switch from prev to next
+- * has to tweak the TSC disable bit in the cr4.
+- */
+-static inline void disable_tsc(struct task_struct *prev_p,
+- struct task_struct *next_p)
+-{
+- struct thread_info *prev, *next;
+-
+- /*
+- * gcc should eliminate the ->thread_info dereference if
+- * has_secure_computing returns 0 at compile time (SECCOMP=n).
+- */
+- prev = task_thread_info(prev_p);
+- next = task_thread_info(next_p);
+-
+- if (has_secure_computing(prev) || has_secure_computing(next)) {
+- /* slow path here */
+- if (has_secure_computing(prev) &&
+- !has_secure_computing(next)) {
+- write_cr4(read_cr4() & ~X86_CR4_TSD);
+- } else if (!has_secure_computing(prev) &&
+- has_secure_computing(next))
+- write_cr4(read_cr4() | X86_CR4_TSD);
++#ifdef CONFIG_SECCOMP
++ if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
++ test_tsk_thread_flag(next_p, TIF_NOTSC)) {
++ /* prev and next are different */
++ if (test_tsk_thread_flag(next_p, TIF_NOTSC))
++ hard_disable_TSC();
++ else
++ hard_enable_TSC();
+ }
++#endif
+ }
+
+ /*
+@@ -649,10 +668,9 @@ struct task_struct fastcall * __switch_t
+ /*
+ * Now maybe handle debug registers
+ */
+- if (unlikely(task_thread_info(next_p)->flags & _TIF_WORK_CTXSW))
+- __switch_to_xtra(next_p);
+-
+- disable_tsc(prev_p, next_p);
++ if (unlikely(task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW_PREV ||
++ task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT))
++ __switch_to_xtra(prev_p, next_p);
+
+ /*
+ * Leave lazy mode, flushing any hypercalls made here.
+Index: head-2008-12-01/arch/x86/kernel/setup_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_32-xen.c 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -114,19 +114,10 @@ static unsigned int highmem_pages = -1;
+ /*
+ * Setup options
+ */
+-struct drive_info_struct { char dummy[32]; } drive_info;
+-#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \
+- defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE)
+-EXPORT_SYMBOL(drive_info);
+-#endif
+ struct screen_info screen_info;
+ EXPORT_SYMBOL(screen_info);
+ struct apm_info apm_info;
+ EXPORT_SYMBOL(apm_info);
+-struct sys_desc_table_struct {
+- unsigned short length;
+- unsigned char table[0];
+-};
+ struct edid_info edid_info;
+ EXPORT_SYMBOL_GPL(edid_info);
+ #ifndef CONFIG_XEN
+@@ -149,7 +140,7 @@ unsigned long saved_videomode;
+
+ static char __initdata command_line[COMMAND_LINE_SIZE];
+
+-unsigned char __initdata boot_params[PARAM_SIZE];
++struct boot_params __initdata boot_params;
+
+ /*
+ * Point at the empty zero page to start with. We map the real shared_info
+@@ -316,18 +307,18 @@ unsigned long __init find_max_low_pfn(vo
+ printk(KERN_WARNING "Warning only %ldMB will be used.\n",
+ MAXMEM>>20);
+ if (max_pfn > MAX_NONPAE_PFN)
+- printk(KERN_WARNING "Use a PAE enabled kernel.\n");
++ printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
+ else
+ printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
+ max_pfn = MAXMEM_PFN;
+ #else /* !CONFIG_HIGHMEM */
+-#ifndef CONFIG_X86_PAE
++#ifndef CONFIG_HIGHMEM64G
+ if (max_pfn > MAX_NONPAE_PFN) {
+ max_pfn = MAX_NONPAE_PFN;
+ printk(KERN_WARNING "Warning only 4GB will be used.\n");
+- printk(KERN_WARNING "Use a PAE enabled kernel.\n");
++ printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
+ }
+-#endif /* !CONFIG_X86_PAE */
++#endif /* !CONFIG_HIGHMEM64G */
+ #endif /* !CONFIG_HIGHMEM */
+ } else {
+ if (highmem_pages == -1)
+@@ -514,7 +505,7 @@ void __init setup_bootmem_allocator(void
+ *
+ * This should all compile down to nothing when NUMA is off.
+ */
+-void __init remapped_pgdat_init(void)
++static void __init remapped_pgdat_init(void)
+ {
+ int nid;
+
+@@ -589,7 +580,6 @@ void __init setup_arch(char **cmdline_p)
+ properly. Setting ROOT_DEV to default to /dev/ram0 breaks initrd.
+ */
+ ROOT_DEV = MKDEV(UNNAMED_MAJOR,0);
+- drive_info = DRIVE_INFO;
+ screen_info = SCREEN_INFO;
+ copy_edid();
+ apm_info.bios = APM_BIOS_INFO;
+@@ -767,6 +757,8 @@ void __init setup_arch(char **cmdline_p)
+ * NOTE: at this point the bootmem allocator is fully available.
+ */
+
++ paravirt_post_allocator_init();
++
+ if (is_initial_xendomain())
+ dmi_scan_machine();
+
+@@ -814,6 +806,7 @@ void __init setup_arch(char **cmdline_p)
+ #endif
+
+ e820_register_memory();
++ e820_mark_nosave_regions();
+
+ if (is_initial_xendomain()) {
+ #ifdef CONFIG_VT
+Index: head-2008-12-01/arch/x86/kernel/smp_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -22,6 +22,7 @@
+
+ #include <asm/mtrr.h>
+ #include <asm/tlbflush.h>
++#include <asm/mmu_context.h>
+ #if 0
+ #include <mach_apic.h>
+ #endif
+@@ -217,13 +218,13 @@ static unsigned long flush_va;
+ static DEFINE_SPINLOCK(tlbstate_lock);
+
+ /*
+- * We cannot call mmdrop() because we are in interrupt context,
++ * We cannot call mmdrop() because we are in interrupt context,
+ * instead update mm->cpu_vm_mask.
+ *
+ * We need to reload %cr3 since the page tables may be going
+ * away from under us..
+ */
+-static inline void leave_mm (unsigned long cpu)
++void leave_mm(unsigned long cpu)
+ {
+ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
+ BUG();
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -76,11 +76,12 @@
+ #include <xen/evtchn.h>
+ #include <xen/interface/vcpu.h>
+
+-#ifdef CONFIG_X86_32
+ #include <asm/i8253.h>
+ DEFINE_SPINLOCK(i8253_lock);
+ EXPORT_SYMBOL(i8253_lock);
+-#else
++
++#ifdef CONFIG_X86_64
++#include <asm/vsyscall.h>
+ volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
+ #endif
+
+@@ -758,56 +759,10 @@ unsigned long read_persistent_clock(void
+ return retval;
+ }
+
+-static void sync_cmos_clock(unsigned long dummy);
+-
+-static DEFINE_TIMER(sync_cmos_timer, sync_cmos_clock, 0, 0);
+-int no_sync_cmos_clock;
+-
+-static void sync_cmos_clock(unsigned long dummy)
+-{
+- struct timeval now, next;
+- int fail = 1;
+-
+- /*
+- * If we have an externally synchronized Linux clock, then update
+- * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
+- * called as close as possible to 500 ms before the new second starts.
+- * This code is run on a timer. If the clock is set, that timer
+- * may not expire at the correct time. Thus, we adjust...
+- */
+- if (!ntp_synced())
+- /*
+- * Not synced, exit, do not restart a timer (if one is
+- * running, let it run out).
+- */
+- return;
+-
+- do_gettimeofday(&now);
+- if (now.tv_usec >= USEC_AFTER - ((unsigned) TICK_SIZE) / 2 &&
+- now.tv_usec <= USEC_BEFORE + ((unsigned) TICK_SIZE) / 2)
+- fail = set_rtc_mmss(now.tv_sec);
+-
+- next.tv_usec = USEC_AFTER - now.tv_usec;
+- if (next.tv_usec <= 0)
+- next.tv_usec += USEC_PER_SEC;
+-
+- if (!fail)
+- next.tv_sec = 659;
+- else
+- next.tv_sec = 0;
+-
+- if (next.tv_usec >= USEC_PER_SEC) {
+- next.tv_sec++;
+- next.tv_usec -= USEC_PER_SEC;
+- }
+- mod_timer(&sync_cmos_timer, jiffies + timeval_to_jiffies(&next));
+-}
+-
+-void notify_arch_cmos_timer(void)
++int update_persistent_clock(struct timespec now)
+ {
+- if (!no_sync_cmos_clock)
+- mod_timer(&sync_cmos_timer, jiffies + 1);
+ mod_timer(&sync_xen_wallclock_timer, jiffies + 1);
++ return set_rtc_mmss(now.tv_sec);
+ }
+
+ extern void (*late_time_init)(void);
+Index: head-2008-12-01/arch/x86/kernel/traps_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -41,6 +41,10 @@
+ #include <linux/mca.h>
+ #endif
+
++#if defined(CONFIG_EDAC)
++#include <linux/edac.h>
++#endif
++
+ #include <asm/processor.h>
+ #include <asm/system.h>
+ #include <asm/io.h>
+@@ -102,36 +106,45 @@ asmlinkage void machine_check(void);
+ int kstack_depth_to_print = 24;
+ static unsigned int code_bytes = 64;
+
+-static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
++static inline int valid_stack_ptr(struct thread_info *tinfo, void *p, unsigned size)
+ {
+ return p > (void *)tinfo &&
+- p < (void *)tinfo + THREAD_SIZE - 3;
++ p <= (void *)tinfo + THREAD_SIZE - size;
+ }
+
++/* The form of the top of the frame on the stack */
++struct stack_frame {
++ struct stack_frame *next_frame;
++ unsigned long return_address;
++};
++
+ static inline unsigned long print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long ebp,
+ struct stacktrace_ops *ops, void *data)
+ {
+- unsigned long addr;
+-
+ #ifdef CONFIG_FRAME_POINTER
+- while (valid_stack_ptr(tinfo, (void *)ebp)) {
+- unsigned long new_ebp;
+- addr = *(unsigned long *)(ebp + 4);
++ struct stack_frame *frame = (struct stack_frame *)ebp;
++ while (valid_stack_ptr(tinfo, frame, sizeof(*frame))) {
++ struct stack_frame *next;
++ unsigned long addr;
++
++ addr = frame->return_address;
+ ops->address(data, addr);
+ /*
+ * break out of recursive entries (such as
+ * end_of_stack_stop_unwind_function). Also,
+ * we can never allow a frame pointer to
+ * move downwards!
+- */
+- new_ebp = *(unsigned long *)ebp;
+- if (new_ebp <= ebp)
++ */
++ next = frame->next_frame;
++ if (next <= frame)
+ break;
+- ebp = new_ebp;
++ frame = next;
+ }
+ #else
+- while (valid_stack_ptr(tinfo, stack)) {
++ while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
++ unsigned long addr;
++
+ addr = *stack++;
+ if (__kernel_text_address(addr))
+ ops->address(data, addr);
+@@ -154,7 +167,7 @@ void dump_trace(struct task_struct *task
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+- if (task && task != current)
++ if (task != current)
+ stack = (unsigned long *)task->thread.esp;
+ }
+
+@@ -213,6 +226,7 @@ static void print_trace_address(void *da
+ {
+ printk("%s [<%08lx>] ", (char *)data, addr);
+ print_symbol("%s\n", addr);
++ touch_nmi_watchdog();
+ }
+
+ static struct stacktrace_ops print_trace_ops = {
+@@ -396,7 +410,7 @@ void die(const char * str, struct pt_reg
+ unsigned long esp;
+ unsigned short ss;
+
+- report_bug(regs->eip);
++ report_bug(regs->eip, regs);
+
+ printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
+ #ifdef CONFIG_PREEMPT
+@@ -439,6 +453,7 @@ void die(const char * str, struct pt_reg
+
+ bust_spinlocks(0);
+ die.lock_owner = -1;
++ add_taint(TAINT_DIE);
+ spin_unlock_irqrestore(&die.lock, flags);
+
+ if (!regs)
+@@ -523,10 +538,12 @@ fastcall void do_##name(struct pt_regs *
+ do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
+ }
+
+-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
++#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
+ fastcall void do_##name(struct pt_regs * regs, long error_code) \
+ { \
+ siginfo_t info; \
++ if (irq) \
++ local_irq_enable(); \
+ info.si_signo = signr; \
+ info.si_errno = 0; \
+ info.si_code = sicode; \
+@@ -566,13 +583,13 @@ DO_VM86_ERROR( 3, SIGTRAP, "int3", int3)
+ #endif
+ DO_VM86_ERROR( 4, SIGSEGV, "overflow", overflow)
+ DO_VM86_ERROR( 5, SIGSEGV, "bounds", bounds)
+-DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip)
++DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip, 0)
+ DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
+ DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
+ DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+ DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
+-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
+-DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0)
++DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
++DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0, 1)
+
+ fastcall void __kprobes do_general_protection(struct pt_regs * regs,
+ long error_code)
+@@ -585,6 +602,13 @@ fastcall void __kprobes do_general_prote
+
+ current->thread.error_code = error_code;
+ current->thread.trap_no = 13;
++ if (show_unhandled_signals && unhandled_signal(current, SIGSEGV) &&
++ printk_ratelimit())
++ printk(KERN_INFO
++ "%s[%d] general protection eip:%lx esp:%lx error:%lx\n",
++ current->comm, current->pid,
++ regs->eip, regs->esp, error_code);
++
+ force_sig(SIGSEGV, current);
+ return;
+
+@@ -610,6 +634,14 @@ mem_parity_error(unsigned char reason, s
+ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
+ "CPU %d.\n", reason, smp_processor_id());
+ printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
++
++#if defined(CONFIG_EDAC)
++ if(edac_handler_set()) {
++ edac_atomic_assert_error();
++ return;
++ }
++#endif
++
+ if (panic_on_unrecovered_nmi)
+ panic("NMI: Not continuing");
+
+@@ -720,6 +752,8 @@ static __kprobes void default_do_nmi(str
+ reassert_nmi();
+ }
+
++static int ignore_nmis;
++
+ fastcall __kprobes void do_nmi(struct pt_regs * regs, long error_code)
+ {
+ int cpu;
+@@ -730,11 +764,24 @@ fastcall __kprobes void do_nmi(struct pt
+
+ ++nmi_count(cpu);
+
+- default_do_nmi(regs);
++ if (!ignore_nmis)
++ default_do_nmi(regs);
+
+ nmi_exit();
+ }
+
++void stop_nmi(void)
++{
++ acpi_nmi_disable();
++ ignore_nmis++;
++}
++
++void restart_nmi(void)
++{
++ ignore_nmis--;
++ acpi_nmi_enable();
++}
++
+ #ifdef CONFIG_KPROBES
+ fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
+ {
+@@ -1023,6 +1070,7 @@ asmlinkage void math_state_restore(void)
+ thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
+ tsk->fpu_counter++;
+ }
++EXPORT_SYMBOL_GPL(math_state_restore);
+
+ #ifndef CONFIG_MATH_EMULATION
+
+Index: head-2008-12-01/arch/x86/mach-xen/setup.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mach-xen/setup.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/arch/x86/mach-xen/setup.c 2008-12-01 11:36:47.000000000 +0100
+@@ -12,6 +12,7 @@
+ #include <asm/e820.h>
+ #include <asm/setup.h>
+ #include <asm/fixmap.h>
++#include <asm/pgtable.h>
+
+ #include <xen/interface/callback.h>
+ #include <xen/interface/memory.h>
+@@ -101,7 +102,7 @@ void __init pre_setup_arch_hook(void)
+
+ init_mm.pgd = swapper_pg_dir = (pgd_t *)xen_start_info->pt_base;
+
+- setup_xen_features();
++ xen_setup_features();
+
+ if (HYPERVISOR_xen_version(XENVER_platform_parameters, &pp) == 0) {
+ hypervisor_virt_start = pp.virt_start;
+@@ -157,4 +158,18 @@ void __init machine_specific_arch_setup(
+ HYPERVISOR_nmi_op(XENNMI_register_callback, &cb);
+ }
+ #endif
++
++ /* Do an early initialization of the fixmap area */
++ {
++ extern pte_t swapper_pg_pmd[PTRS_PER_PTE];
++ unsigned long addr = __fix_to_virt(FIX_EARLYCON_MEM_BASE);
++ pgd_t *pgd = (pgd_t *)xen_start_info->pt_base;
++ pud_t *pud = pud_offset(pgd + pgd_index(addr), addr);
++ pmd_t *pmd = pmd_offset(pud, addr);
++
++ swapper_pg_dir = pgd;
++ init_mm.pgd = pgd;
++ make_lowmem_page_readonly(swapper_pg_pmd, XENFEAT_writable_page_tables);
++ set_pmd(pmd, __pmd(__pa_symbol(swapper_pg_pmd) | _PAGE_TABLE));
++ }
+ }
+Index: head-2008-12-01/arch/x86/mm/fault_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -346,7 +346,10 @@ static inline pmd_t *vmalloc_sync_one(pg
+ pmd_k = pmd_offset(pud_k, address);
+ if (!pmd_present(*pmd_k))
+ return NULL;
+- if (!pmd_present(*pmd))
++ if (!pmd_present(*pmd)) {
++ bool lazy = x86_read_percpu(xen_lazy_mmu);
++
++ x86_write_percpu(xen_lazy_mmu, false);
+ #if CONFIG_XEN_COMPAT > 0x030002
+ set_pmd(pmd, *pmd_k);
+ #else
+@@ -356,7 +359,8 @@ static inline pmd_t *vmalloc_sync_one(pg
+ */
+ set_pmd(pmd, __pmd(pmd_val(*pmd_k)));
+ #endif
+- else
++ x86_write_percpu(xen_lazy_mmu, lazy);
++ } else
+ BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
+ return pmd_k;
+ }
+@@ -388,6 +392,8 @@ static inline int vmalloc_fault(unsigned
+ return 0;
+ }
+
++int show_unhandled_signals = 1;
++
+ /*
+ * This routine handles page faults. It determines the address,
+ * and the problem, and then passes it off to one of the appropriate
+@@ -408,6 +414,7 @@ fastcall void __kprobes do_page_fault(st
+ struct vm_area_struct * vma;
+ unsigned long address;
+ int write, si_code;
++ int fault;
+
+ /* get the address */
+ address = read_cr2();
+@@ -541,20 +548,18 @@ good_area:
+ * make sure we exit gracefully rather than endlessly redo
+ * the fault.
+ */
+- switch (handle_mm_fault(mm, vma, address, write)) {
+- case VM_FAULT_MINOR:
+- tsk->min_flt++;
+- break;
+- case VM_FAULT_MAJOR:
+- tsk->maj_flt++;
+- break;
+- case VM_FAULT_SIGBUS:
+- goto do_sigbus;
+- case VM_FAULT_OOM:
++ fault = handle_mm_fault(mm, vma, address, write);
++ if (unlikely(fault & VM_FAULT_ERROR)) {
++ if (fault & VM_FAULT_OOM)
+ goto out_of_memory;
+- default:
+- BUG();
++ else if (fault & VM_FAULT_SIGBUS)
++ goto do_sigbus;
++ BUG();
+ }
++ if (fault & VM_FAULT_MAJOR)
++ tsk->maj_flt++;
++ else
++ tsk->min_flt++;
+
+ /*
+ * Did it hit the DOS screen memory VA from vm86 mode?
+@@ -589,6 +594,14 @@ bad_area_nosemaphore:
+ if (is_prefetch(regs, address, error_code))
+ return;
+
++ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
++ printk_ratelimit()) {
++ printk("%s%s[%d]: segfault at %08lx eip %08lx "
++ "esp %08lx error %lx\n",
++ tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
++ tsk->comm, tsk->pid, address, regs->eip,
++ regs->esp, error_code);
++ }
+ tsk->thread.cr2 = address;
+ /* Kernel addresses are always protection faults */
+ tsk->thread.error_code = error_code | (address >= TASK_SIZE);
+Index: head-2008-12-01/arch/x86/mm/highmem_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/highmem_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/highmem_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -34,17 +34,16 @@ void *kmap_atomic_prot(struct page *page
+ /* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
+ pagefault_disable();
+
+- idx = type + KM_TYPE_NR*smp_processor_id();
+- BUG_ON(!pte_none(*(kmap_pte-idx)));
+-
+ if (!PageHighMem(page))
+ return page_address(page);
+
++ idx = type + KM_TYPE_NR*smp_processor_id();
+ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
++ BUG_ON(!pte_none(*(kmap_pte-idx)));
+ set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
+ /*arch_flush_lazy_mmu_mode();*/
+
+- return (void*) vaddr;
++ return (void *)vaddr;
+ }
+
+ void *kmap_atomic(struct page *page, enum km_type type)
+Index: head-2008-12-01/arch/x86/mm/init_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -96,7 +96,7 @@ static pte_t * __init one_page_table_ini
+ #endif
+ pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+
+- paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
++ paravirt_alloc_pt(&init_mm, __pa(page_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(page_table,
+ XENFEAT_writable_page_tables);
+ set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
+@@ -446,7 +446,7 @@ static void __init pagetable_init (void)
+ xen_pagetable_setup_done(pgd_base);
+ }
+
+-#if defined(CONFIG_SOFTWARE_SUSPEND) || defined(CONFIG_ACPI_SLEEP)
++#if defined(CONFIG_HIBERNATION) || defined(CONFIG_ACPI)
+ /*
+ * Swap suspend & friends need this for resume because things like the intel-agp
+ * driver might have split up a kernel 4MB mapping.
+@@ -485,9 +485,13 @@ void zap_low_mappings (void)
+ flush_tlb_all();
+ }
+
++int nx_enabled = 0;
++
++#ifdef CONFIG_X86_PAE
++
+ static int disable_nx __initdata = 0;
+ u64 __supported_pte_mask __read_mostly = ~_PAGE_NX;
+-EXPORT_SYMBOL(__supported_pte_mask);
++EXPORT_SYMBOL_GPL(__supported_pte_mask);
+
+ /*
+ * noexec = on|off
+@@ -514,9 +518,6 @@ static int __init noexec_setup(char *str
+ }
+ early_param("noexec", noexec_setup);
+
+-int nx_enabled = 0;
+-#ifdef CONFIG_X86_PAE
+-
+ static void __init set_nx(void)
+ {
+ unsigned int v[4], l, h;
+@@ -764,7 +765,7 @@ void __init mem_init(void)
+ zap_low_mappings();
+ #endif
+
+- set_bit(PG_pinned, &virt_to_page(init_mm.pgd)->flags);
++ SetPagePinned(virt_to_page(init_mm.pgd));
+ }
+
+ #ifdef CONFIG_MEMORY_HOTPLUG
+@@ -796,8 +797,7 @@ void __init pgtable_cache_init(void)
+ PTRS_PER_PMD*sizeof(pmd_t),
+ PTRS_PER_PMD*sizeof(pmd_t),
+ SLAB_PANIC,
+- pmd_ctor,
+- NULL);
++ pmd_ctor);
+ if (!SHARED_KERNEL_PMD) {
+ /* If we're in PAE mode and have a non-shared
+ kernel pmd, then the pgd size must be a
+Index: head-2008-12-01/arch/x86/mm/ioremap_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/ioremap_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/ioremap_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -363,9 +363,8 @@ void iounmap(volatile void __iomem *addr
+
+ /* Reset the direct mapping. Can block */
+ if ((p->flags >> 20) && is_local_lowmem(p->phys_addr)) {
+- /* p->size includes the guard page, but cpa doesn't like that */
+ change_page_attr(virt_to_page(bus_to_virt(p->phys_addr)),
+- (p->size - PAGE_SIZE) >> PAGE_SHIFT,
++ get_vm_area_size(p) >> PAGE_SHIFT,
+ PAGE_KERNEL);
+ global_flush_tlb();
+ }
+Index: head-2008-12-01/arch/x86/mm/pgtable_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -198,7 +198,7 @@ void pte_free(struct page *pte)
+ va, pfn_pte(pfn, PAGE_KERNEL), 0))
+ BUG();
+ } else
+- clear_bit(PG_pinned, &pte->flags);
++ ClearPagePinned(pte);
+
+ ClearPageForeign(pte);
+ init_page_count(pte);
+@@ -248,7 +248,7 @@ static inline void pgd_list_del(pgd_t *p
+
+ #if (PTRS_PER_PMD == 1)
+ /* Non-PAE pgd constructor */
+-void pgd_ctor(void *pgd)
++static void pgd_ctor(void *pgd)
+ {
+ unsigned long flags;
+
+@@ -271,7 +271,7 @@ void pgd_ctor(void *pgd)
+ }
+ #else /* PTRS_PER_PMD > 1 */
+ /* PAE pgd constructor */
+-void pgd_ctor(void *pgd)
++static void pgd_ctor(void *pgd)
+ {
+ /* PAE, kernel PMD may be shared */
+
+@@ -285,7 +285,7 @@ void pgd_ctor(void *pgd)
+ }
+ #endif /* PTRS_PER_PMD */
+
+-void pgd_dtor(void *pgd)
++static void pgd_dtor(void *pgd)
+ {
+ unsigned long flags; /* can be called from interrupt context */
+
+@@ -637,9 +637,9 @@ static inline unsigned int pgd_walk_set_
+
+ if (PageHighMem(page)) {
+ if (pgprot_val(flags) & _PAGE_RW)
+- clear_bit(PG_pinned, &page->flags);
++ ClearPagePinned(page);
+ else
+- set_bit(PG_pinned, &page->flags);
++ SetPagePinned(page);
+ } else {
+ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
+ (unsigned long)__va(pfn << PAGE_SHIFT),
+@@ -709,19 +709,19 @@ static void __pgd_pin(pgd_t *pgd)
+ pgd_walk(pgd, PAGE_KERNEL_RO);
+ kmap_flush_unused();
+ xen_pgd_pin(__pa(pgd));
+- set_bit(PG_pinned, &virt_to_page(pgd)->flags);
++ SetPagePinned(virt_to_page(pgd));
+ }
+
+ static void __pgd_unpin(pgd_t *pgd)
+ {
+ xen_pgd_unpin(__pa(pgd));
+ pgd_walk(pgd, PAGE_KERNEL);
+- clear_bit(PG_pinned, &virt_to_page(pgd)->flags);
++ ClearPagePinned(virt_to_page(pgd));
+ }
+
+ static void pgd_test_and_unpin(pgd_t *pgd)
+ {
+- if (test_bit(PG_pinned, &virt_to_page(pgd)->flags))
++ if (PagePinned(virt_to_page(pgd)))
+ __pgd_unpin(pgd);
+ }
+
+@@ -759,7 +759,7 @@ void mm_pin_all(void)
+ */
+ spin_lock_irqsave(&pgd_lock, flags);
+ for (page = pgd_list; page; page = (struct page *)page->index) {
+- if (!test_bit(PG_pinned, &page->flags))
++ if (!PagePinned(page))
+ __pgd_pin((pgd_t *)page_address(page));
+ }
+ spin_unlock_irqrestore(&pgd_lock, flags);
+@@ -767,7 +767,7 @@ void mm_pin_all(void)
+
+ void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+ {
+- if (!test_bit(PG_pinned, &virt_to_page(mm->pgd)->flags))
++ if (!PagePinned(virt_to_page(mm->pgd)))
+ mm_pin(mm);
+ }
+
+@@ -793,7 +793,7 @@ void arch_exit_mmap(struct mm_struct *mm
+
+ task_unlock(tsk);
+
+- if (test_bit(PG_pinned, &virt_to_page(mm->pgd)->flags) &&
++ if (PagePinned(virt_to_page(mm->pgd)) &&
+ (atomic_read(&mm->mm_count) == 1) &&
+ !mm->context.has_foreign_mappings)
+ mm_unpin(mm);
+Index: head-2008-12-01/arch/x86/pci/irq-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/pci/irq-xen.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/arch/x86/pci/irq-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -142,8 +142,9 @@ static void __init pirq_peer_trick(void)
+ for(i = 1; i < 256; i++) {
+ if (!busmap[i] || pci_find_bus(0, i))
+ continue;
+- if (pci_scan_bus(i, &pci_root_ops, NULL))
+- printk(KERN_INFO "PCI: Discovered primary peer bus %02x [IRQ]\n", i);
++ if (pci_scan_bus_with_sysdata(i))
++ printk(KERN_INFO "PCI: Discovered primary peer "
++ "bus %02x [IRQ]\n", i);
+ }
+ pcibios_last_bus = -1;
+ }
+@@ -553,6 +554,7 @@ static __init int intel_router_probe(str
+ case PCI_DEVICE_ID_INTEL_ICH9_3:
+ case PCI_DEVICE_ID_INTEL_ICH9_4:
+ case PCI_DEVICE_ID_INTEL_ICH9_5:
++ case PCI_DEVICE_ID_INTEL_TOLAPAI_0:
+ r->name = "PIIX/ICH";
+ r->get = pirq_piix_get;
+ r->set = pirq_piix_set;
+Index: head-2008-12-01/arch/x86/xen/Kconfig
+===================================================================
+--- head-2008-12-01.orig/arch/x86/xen/Kconfig 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/xen/Kconfig 2008-12-01 11:36:47.000000000 +0100
+@@ -2,7 +2,7 @@
+ # This Kconfig describes xen options
+ #
+
+-config XEN
++config PARAVIRT_XEN
+ bool "Xen guest support"
+ select PARAVIRT
+ select PARAVIRT_CLOCK
+Index: head-2008-12-01/arch/x86/xen/xen-head.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/xen/xen-head.S 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/xen/xen-head.S 2008-12-01 11:36:47.000000000 +0100
+@@ -1,7 +1,7 @@
+ /* Xen-specific pieces of head.S, intended to be included in the right
+ place in head.S */
+
+-#ifdef CONFIG_XEN
++#ifdef CONFIG_PARAVIRT_XEN
+
+ #include <linux/elfnote.h>
+ #include <linux/init.h>
+@@ -52,4 +52,4 @@ ENTRY(hypercall_page)
+ ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START)
+ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0)
+
+-#endif /*CONFIG_XEN */
++#endif /* CONFIG_PARAVIRT_XEN */
+Index: head-2008-12-01/arch/x86/ia32/ia32entry-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/ia32/ia32entry-xen.S 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/ia32/ia32entry-xen.S 2008-12-01 11:36:47.000000000 +0100
+@@ -105,7 +105,7 @@ ENTRY(ia32_sysenter_target)
+ movl $VSYSCALL32_SYSEXIT,8(%rsp)
+ movq %rax,(%rsp)
+ cld
+- SAVE_ARGS 0,0,0
++ SAVE_ARGS 0,0,1
+ /* no need to do an access_ok check here because rbp has been
+ 32bit zero extended */
+ 1: movl (%rbp),%r9d
+@@ -244,7 +244,7 @@ ia32_badarg:
+ */
+
+ ENTRY(ia32_syscall)
+- CFI_STARTPROC simple
++ CFI_STARTPROC32 simple
+ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA rsp,SS+8-RIP+16
+ /*CFI_REL_OFFSET ss,SS-RIP+16*/
+@@ -280,6 +280,7 @@ ia32_sysret:
+
+ ia32_tracesys:
+ SAVE_REST
++ CLEAR_RREGS
+ movq $-ENOSYS,RAX(%rsp) /* really needed? */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+@@ -476,7 +477,7 @@ ia32_sys_call_table:
+ .quad sys_init_module
+ .quad sys_delete_module
+ .quad quiet_ni_syscall /* 130 get_kernel_syms */
+- .quad sys_quotactl
++ .quad sys32_quotactl
+ .quad sys_getpgid
+ .quad sys_fchdir
+ .quad quiet_ni_syscall /* bdflush */
+@@ -669,4 +670,5 @@ ia32_sys_call_table:
+ .quad compat_sys_signalfd
+ .quad compat_sys_timerfd
+ .quad sys_eventfd
++ .quad sys32_fallocate
+ ia32_syscall_end:
+Index: head-2008-12-01/arch/x86/kernel/acpi/sleep_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/sleep_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/acpi/sleep_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -51,12 +51,10 @@
+ Low-Level Sleep Support
+ -------------------------------------------------------------------------- */
+
+-#ifdef CONFIG_ACPI_SLEEP
+-
+ #ifndef CONFIG_ACPI_PV_SLEEP
+ /* address in low memory of the wakeup routine. */
+ unsigned long acpi_wakeup_address = 0;
+-unsigned long acpi_video_flags;
++unsigned long acpi_realmode_flags;
+ extern char wakeup_start, wakeup_end;
+
+ extern unsigned long acpi_copy_wakeup_routine(unsigned long);
+@@ -109,9 +107,11 @@ static int __init acpi_sleep_setup(char
+ {
+ while ((str != NULL) && (*str != '\0')) {
+ if (strncmp(str, "s3_bios", 7) == 0)
+- acpi_video_flags = 1;
++ acpi_realmode_flags |= 1;
+ if (strncmp(str, "s3_mode", 7) == 0)
+- acpi_video_flags |= 2;
++ acpi_realmode_flags |= 2;
++ if (strncmp(str, "s3_beep", 7) == 0)
++ acpi_realmode_flags |= 4;
+ str = strchr(str, ',');
+ if (str != NULL)
+ str += strspn(str, ", \t");
+@@ -123,8 +123,6 @@ static int __init acpi_sleep_setup(char
+ __setup("acpi_sleep=", acpi_sleep_setup);
+ #endif /* CONFIG_ACPI_PV_SLEEP */
+
+-#endif /*CONFIG_ACPI_SLEEP */
+-
+ void acpi_pci_link_exit(void)
+ {
+ }
+Index: head-2008-12-01/arch/x86/kernel/apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/apic_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/apic_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -50,7 +50,7 @@ void ack_bad_irq(unsigned int irq)
+ * holds up an irq slot - in excessive cases (when multiple
+ * unexpected vectors occur) that might lock up the APIC
+ * completely.
+- * But don't ack when the APIC is disabled. -AK
++ * But don't ack when the APIC is disabled. -AK
+ */
+ if (!disable_apic)
+ ack_APIC_irq();
+@@ -132,20 +132,6 @@ asmlinkage void smp_spurious_interrupt(v
+ if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
+ ack_APIC_irq();
+
+-#if 0
+- static unsigned long last_warning;
+- static unsigned long skipped;
+-
+- /* see sw-dev-man vol 3, chapter 7.4.13.5 */
+- if (time_before(last_warning+30*HZ,jiffies)) {
+- printk(KERN_INFO "spurious APIC interrupt on CPU#%d, %ld skipped.\n",
+- smp_processor_id(), skipped);
+- last_warning = jiffies;
+- skipped = 0;
+- } else {
+- skipped++;
+- }
+-#endif
+ irq_exit();
+ }
+
+@@ -177,7 +163,7 @@ asmlinkage void smp_error_interrupt(void
+ 7: Illegal register address
+ */
+ printk (KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
+- smp_processor_id(), v , v1);
++ smp_processor_id(), v , v1);
+ irq_exit();
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/e820_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/e820_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/e820_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -222,37 +222,6 @@ unsigned long __init e820_end_of_ram(voi
+ }
+
+ /*
+- * Find the hole size in the range.
+- */
+-unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
+-{
+- unsigned long ram = 0;
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- unsigned long last, addr;
+-
+- if (ei->type != E820_RAM ||
+- ei->addr+ei->size <= start ||
+- ei->addr >= end)
+- continue;
+-
+- addr = round_up(ei->addr, PAGE_SIZE);
+- if (addr < start)
+- addr = start;
+-
+- last = round_down(ei->addr + ei->size, PAGE_SIZE);
+- if (last >= end)
+- last = end;
+-
+- if (last > addr)
+- ram += last - addr;
+- }
+- return ((end - start) - ram);
+-}
+-
+-/*
+ * Mark e820 reserved areas as busy for the resource manager.
+ */
+ void __init e820_reserve_resources(struct e820entry *e820, int nr_map)
+@@ -325,47 +294,61 @@ void __init e820_mark_nosave_regions(voi
+ }
+ #endif
+
++/*
++ * Finds an active region in the address range from start_pfn to end_pfn and
++ * returns its range in ei_startpfn and ei_endpfn for the e820 entry.
++ */
++static int __init e820_find_active_region(const struct e820entry *ei,
++ unsigned long start_pfn,
++ unsigned long end_pfn,
++ unsigned long *ei_startpfn,
++ unsigned long *ei_endpfn)
++{
++ *ei_startpfn = round_up(ei->addr, PAGE_SIZE) >> PAGE_SHIFT;
++ *ei_endpfn = round_down(ei->addr + ei->size, PAGE_SIZE) >> PAGE_SHIFT;
++
++ /* Skip map entries smaller than a page */
++ if (*ei_startpfn >= *ei_endpfn)
++ return 0;
++
++ /* Check if end_pfn_map should be updated */
++ if (ei->type != E820_RAM && *ei_endpfn > end_pfn_map)
++ end_pfn_map = *ei_endpfn;
++
++ /* Skip if map is outside the node */
++ if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
++ *ei_startpfn >= end_pfn)
++ return 0;
++
++ /* Check for overlaps */
++ if (*ei_startpfn < start_pfn)
++ *ei_startpfn = start_pfn;
++ if (*ei_endpfn > end_pfn)
++ *ei_endpfn = end_pfn;
++
++ /* Obey end_user_pfn to save on memmap */
++ if (*ei_startpfn >= end_user_pfn)
++ return 0;
++ if (*ei_endpfn > end_user_pfn)
++ *ei_endpfn = end_user_pfn;
++
++ return 1;
++}
++
+ /* Walk the e820 map and register active regions within a node */
+ void __init
+ e820_register_active_regions(int nid, unsigned long start_pfn,
+ unsigned long end_pfn)
+ {
++ unsigned long ei_startpfn;
++ unsigned long ei_endpfn;
+ int i;
+- unsigned long ei_startpfn, ei_endpfn;
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- ei_startpfn = round_up(ei->addr, PAGE_SIZE) >> PAGE_SHIFT;
+- ei_endpfn = round_down(ei->addr + ei->size, PAGE_SIZE)
+- >> PAGE_SHIFT;
+-
+- /* Skip map entries smaller than a page */
+- if (ei_startpfn >= ei_endpfn)
+- continue;
+-
+- /* Check if end_pfn_map should be updated */
+- if (ei->type != E820_RAM && ei_endpfn > end_pfn_map)
+- end_pfn_map = ei_endpfn;
+-
+- /* Skip if map is outside the node */
+- if (ei->type != E820_RAM ||
+- ei_endpfn <= start_pfn ||
+- ei_startpfn >= end_pfn)
+- continue;
+-
+- /* Check for overlaps */
+- if (ei_startpfn < start_pfn)
+- ei_startpfn = start_pfn;
+- if (ei_endpfn > end_pfn)
+- ei_endpfn = end_pfn;
+-
+- /* Obey end_user_pfn to save on memmap */
+- if (ei_startpfn >= end_user_pfn)
+- continue;
+- if (ei_endpfn > end_user_pfn)
+- ei_endpfn = end_user_pfn;
+
+- add_active_range(nid, ei_startpfn, ei_endpfn);
+- }
++ for (i = 0; i < e820.nr_map; i++)
++ if (e820_find_active_region(&e820.map[i],
++ start_pfn, end_pfn,
++ &ei_startpfn, &ei_endpfn))
++ add_active_range(nid, ei_startpfn, ei_endpfn);
+ }
+
+ /*
+@@ -386,12 +369,35 @@ void __init add_memory_region(unsigned l
+ e820.nr_map++;
+ }
+
++/*
++ * Find the hole size (in bytes) in the memory range.
++ * @start: starting address of the memory range to scan
++ * @end: ending address of the memory range to scan
++ */
++unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
++{
++ unsigned long start_pfn = start >> PAGE_SHIFT;
++ unsigned long end_pfn = end >> PAGE_SHIFT;
++ unsigned long ei_startpfn;
++ unsigned long ei_endpfn;
++ unsigned long ram = 0;
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ if (e820_find_active_region(&e820.map[i],
++ start_pfn, end_pfn,
++ &ei_startpfn, &ei_endpfn))
++ ram += ei_endpfn - ei_startpfn;
++ }
++ return end - start - (ram << PAGE_SHIFT);
++}
++
+ void __init e820_print_map(char *who)
+ {
+ int i;
+
+ for (i = 0; i < e820.nr_map; i++) {
+- printk(" %s: %016Lx - %016Lx ", who,
++ printk(KERN_INFO " %s: %016Lx - %016Lx ", who,
+ (unsigned long long) e820.map[i].addr,
+ (unsigned long long) (e820.map[i].addr + e820.map[i].size));
+ switch (e820.map[i].type) {
+Index: head-2008-12-01/arch/x86/kernel/early_printk-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/early_printk-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/early_printk-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -174,6 +174,7 @@ static __init void early_serial_init(cha
+ * mappings. Someone should fix this for domain 0. For now, use fake serial.
+ */
+ #define early_vga_console early_serial_console
++#define xenboot_console early_serial_console
+
+ #endif
+
+@@ -261,20 +262,22 @@ static int __init setup_early_printk(cha
+ } else if (!strncmp(buf, "ttyS", 4)) {
+ early_serial_init(buf);
+ early_console = &early_serial_console;
+- } else if (!strncmp(buf, "vga", 3)
++ } else if (!strncmp(buf, "vga", 3)) {
+ #ifndef CONFIG_XEN
+ && SCREEN_INFO.orig_video_isVGA == 1) {
+ max_xpos = SCREEN_INFO.orig_video_cols;
+ max_ypos = SCREEN_INFO.orig_video_lines;
+ current_ypos = SCREEN_INFO.orig_y;
+-#else
+- || !strncmp(buf, "xen", 3)) {
+ #endif
+ early_console = &early_vga_console;
+ } else if (!strncmp(buf, "simnow", 6)) {
+ simnow_init(buf + 6);
+ early_console = &simnow_console;
+ keep_early = 1;
++#ifdef CONFIG_XEN
++ } else if (!strncmp(buf, "xen", 3)) {
++ early_console = &xenboot_console;
++#endif
+ }
+
+ if (keep_early)
+Index: head-2008-12-01/arch/x86/kernel/entry_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:36:47.000000000 +0100
+@@ -310,7 +310,7 @@ sysret_signal:
+ TRACE_IRQS_ON
+ /* sti */
+ XEN_UNBLOCK_EVENTS(%rsi)
+- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
++ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ jz 1f
+
+ /* Really a signal */
+@@ -409,7 +409,7 @@ int_very_careful:
+ jmp int_restore_rest
+
+ int_signal:
+- testl $(_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_SINGLESTEP),%edx
++ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ jz 1f
+ movq %rsp,%rdi # &ptregs -> arg1
+ xorl %esi,%esi # oldset -> arg2
+@@ -552,7 +552,7 @@ retint_careful:
+ jmp retint_check
+
+ retint_signal:
+- testl $(_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SINGLESTEP),%edx
++ testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
+ jz retint_restore_args
+ TRACE_IRQS_ON
+ XEN_UNBLOCK_EVENTS(%rsi)
+Index: head-2008-12-01/arch/x86/kernel/head_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head_64-xen.S 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head_64-xen.S 2008-12-01 11:36:47.000000000 +0100
+@@ -23,7 +23,7 @@
+ #include <asm/dwarf2.h>
+ #include <xen/interface/elfnote.h>
+
+- .section .bootstrap.text, "ax", @progbits
++ .section .text.head, "ax", @progbits
+ .code64
+ .globl startup_64
+ startup_64:
+@@ -39,7 +39,7 @@ startup_64:
+
+ #define NEXT_PAGE(name) \
+ .balign PAGE_SIZE; \
+- phys_##name = . - .bootstrap.text; \
++ phys_##name = . - .text.head; \
+ ENTRY(name)
+
+ NEXT_PAGE(init_level4_pgt)
+@@ -66,6 +66,12 @@ NEXT_PAGE(level3_user_pgt)
+ NEXT_PAGE(level2_kernel_pgt)
+ .fill 512,8,0
+
++NEXT_PAGE(level2_fixmap_pgt)
++ .fill 512,8,0
++
++NEXT_PAGE(level1_fixmap_pgt)
++ .fill 512,8,0
++
+ NEXT_PAGE(hypercall_page)
+ CFI_STARTPROC
+ .rept 0x1000 / 0x20
+@@ -172,18 +178,18 @@ ENTRY(empty_zero_page)
+ .byte 0
+ #endif /* CONFIG_XEN_COMPAT <= 0x030002 */
+
+- ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "linux")
+- ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, "2.6")
+- ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0")
+- ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .quad, __START_KERNEL_map)
++ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux")
++ ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6")
++ ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0")
++ ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .quad __START_KERNEL_map)
+ #if CONFIG_XEN_COMPAT <= 0x030002
+- ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .quad, __START_KERNEL_map)
++ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .quad __START_KERNEL_map)
+ #else
+- ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .quad, 0)
++ ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .quad 0)
+ #endif
+- ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .quad, startup_64)
+- ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .quad, hypercall_page)
+- ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .quad, _PAGE_PRESENT,_PAGE_PRESENT)
+- ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
+- ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic")
+- ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long, 1)
++ ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .quad startup_64)
++ ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .quad hypercall_page)
++ ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .quad _PAGE_PRESENT, _PAGE_PRESENT)
++ ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
++ ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic")
++ ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
+Index: head-2008-12-01/arch/x86/kernel/head64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -90,7 +90,7 @@ void __init x86_64_start_kernel(char * r
+ unsigned long machine_to_phys_nr_ents;
+ int i;
+
+- setup_xen_features();
++ xen_setup_features();
+
+ xen_start_info = (struct start_info *)real_mode_data;
+ if (!xen_feature(XENFEAT_auto_translated_physmap))
+Index: head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -165,7 +165,9 @@ static inline void io_apic_write(unsigne
+ #endif
+ }
+
+-#ifndef CONFIG_XEN
++#ifdef CONFIG_XEN
++#define io_apic_modify io_apic_write
++#else
+ /*
+ * Re-write a value: to be used for read-modify-write
+ * cycles where the read already set up the index register.
+@@ -175,8 +177,32 @@ static inline void io_apic_modify(unsign
+ struct io_apic __iomem *io_apic = io_apic_base(apic);
+ writel(value, &io_apic->data);
+ }
+-#else
+-#define io_apic_modify io_apic_write
++
++static int io_apic_level_ack_pending(unsigned int irq)
++{
++ struct irq_pin_list *entry;
++ unsigned long flags;
++ int pending = 0;
++
++ spin_lock_irqsave(&ioapic_lock, flags);
++ entry = irq_2_pin + irq;
++ for (;;) {
++ unsigned int reg;
++ int pin;
++
++ pin = entry->pin;
++ if (pin == -1)
++ break;
++ reg = io_apic_read(entry->apic, 0x10 + pin*2);
++ /* Is the remote IRR bit set? */
++ pending |= (reg >> 14) & 1;
++ if (!entry->next)
++ break;
++ entry = irq_2_pin + entry->next;
++ }
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ return pending;
++}
+ #endif
+
+ /*
+@@ -406,14 +432,12 @@ static void clear_IO_APIC (void)
+ int skip_ioapic_setup;
+ int ioapic_force;
+
+-/* dummy parsing: see setup.c */
+-
+-static int __init disable_ioapic_setup(char *str)
++static int __init parse_noapic(char *str)
+ {
+- skip_ioapic_setup = 1;
++ disable_ioapic_setup();
+ return 0;
+ }
+-early_param("noapic", disable_ioapic_setup);
++early_param("noapic", parse_noapic);
+
+ /* Actually the next is obsolete, but keep it for paranoid reasons -AK */
+ static int __init disable_timer_pin_setup(char *arg)
+@@ -765,12 +789,15 @@ static struct irq_chip ioapic_chip;
+
+ static void ioapic_register_intr(int irq, unsigned long trigger)
+ {
+- if (trigger)
++ if (trigger) {
++ irq_desc[irq].status |= IRQ_LEVEL;
+ set_irq_chip_and_handler_name(irq, &ioapic_chip,
+ handle_fasteoi_irq, "fasteoi");
+- else
++ } else {
++ irq_desc[irq].status &= ~IRQ_LEVEL;
+ set_irq_chip_and_handler_name(irq, &ioapic_chip,
+ handle_edge_irq, "edge");
++ }
+ }
+ #else
+ #define ioapic_register_intr(irq, trigger) evtchn_register_pirq(irq)
+@@ -1419,9 +1446,37 @@ static void ack_apic_level(unsigned int
+ ack_APIC_irq();
+
+ /* Now we can move and renable the irq */
+- move_masked_irq(irq);
+- if (unlikely(do_unmask_irq))
++ if (unlikely(do_unmask_irq)) {
++ /* Only migrate the irq if the ack has been received.
++ *
++ * On rare occasions the broadcast level triggered ack gets
++ * delayed going to ioapics, and if we reprogram the
++ * vector while Remote IRR is still set the irq will never
++ * fire again.
++ *
++ * To prevent this scenario we read the Remote IRR bit
++ * of the ioapic. This has two effects.
++ * - On any sane system the read of the ioapic will
++ * flush writes (and acks) going to the ioapic from
++ * this cpu.
++ * - We get to see if the ACK has actually been delivered.
++ *
++ * Based on failed experiments of reprogramming the
++ * ioapic entry from outside of irq context starting
++ * with masking the ioapic entry and then polling until
++ * Remote IRR was clear before reprogramming the
++ * ioapic I don't trust the Remote IRR bit to be
++ * completey accurate.
++ *
++ * However there appears to be no other way to plug
++ * this race, so if the Remote IRR bit is not
++ * accurate and is causing problems then it is a hardware bug
++ * and you can go talk to the chipset vendor about it.
++ */
++ if (!io_apic_level_ack_pending(irq))
++ move_masked_irq(irq);
+ unmask_IO_APIC_irq(irq);
++ }
+ }
+
+ static struct irq_chip ioapic_chip __read_mostly = {
+Index: head-2008-12-01/arch/x86/kernel/ldt_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ldt_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ldt_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -114,6 +114,8 @@ int init_new_context(struct task_struct
+ memset(&mm->context, 0, sizeof(mm->context));
+ init_MUTEX(&mm->context.sem);
+ old_mm = current->mm;
++ if (old_mm)
++ mm->context.vdso = old_mm->context.vdso;
+ if (old_mm && old_mm->context.size > 0) {
+ down(&old_mm->context.sem);
+ retval = copy_ldt(&mm->context, &old_mm->context);
+@@ -146,7 +148,7 @@ void destroy_context(struct mm_struct *m
+ kfree(mm->context.ldt);
+ mm->context.size = 0;
+ }
+- if (!mm->context.pinned) {
++ if (!PagePinned(virt_to_page(mm->pgd))) {
+ spin_lock(&mm_unpinned_lock);
+ list_del(&mm->context.unpinned);
+ spin_unlock(&mm_unpinned_lock);
+Index: head-2008-12-01/arch/x86/kernel/mpparse_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/mpparse_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/mpparse_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -32,7 +32,6 @@
+
+ /* Have we found an MP table */
+ int smp_found_config;
+-unsigned int __initdata maxcpus = NR_CPUS;
+
+ /*
+ * Various Linux-internal data structures created from the
+@@ -657,6 +656,20 @@ static int mp_find_ioapic(int gsi)
+ return -1;
+ }
+
++static u8 uniq_ioapic_id(u8 id)
++{
++ int i;
++ DECLARE_BITMAP(used, 256);
++ bitmap_zero(used, 256);
++ for (i = 0; i < nr_ioapics; i++) {
++ struct mpc_config_ioapic *ia = &mp_ioapics[i];
++ __set_bit(ia->mpc_apicid, used);
++ }
++ if (!test_bit(id, used))
++ return id;
++ return find_first_zero_bit(used, 256);
++}
++
+ void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
+ {
+ int idx = 0;
+@@ -664,7 +677,7 @@ void __init mp_register_ioapic(u8 id, u3
+ if (bad_ioapic(address))
+ return;
+
+- idx = nr_ioapics++;
++ idx = nr_ioapics;
+
+ mp_ioapics[idx].mpc_type = MP_IOAPIC;
+ mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
+@@ -673,7 +686,7 @@ void __init mp_register_ioapic(u8 id, u3
+ #ifndef CONFIG_XEN
+ set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
+ #endif
+- mp_ioapics[idx].mpc_apicid = id;
++ mp_ioapics[idx].mpc_apicid = uniq_ioapic_id(id);
+ mp_ioapics[idx].mpc_apicver = 0;
+
+ /*
+@@ -690,6 +703,8 @@ void __init mp_register_ioapic(u8 id, u3
+ mp_ioapics[idx].mpc_apicaddr,
+ mp_ioapic_routing[idx].gsi_start,
+ mp_ioapic_routing[idx].gsi_end);
++
++ nr_ioapics++;
+ }
+
+ void __init
+Index: head-2008-12-01/arch/x86/kernel/process_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -26,6 +26,7 @@
+ #include <linux/sched.h>
+ #include <linux/kernel.h>
+ #include <linux/mm.h>
++#include <linux/fs.h>
+ #include <linux/elfcore.h>
+ #include <linux/smp.h>
+ #include <linux/slab.h>
+@@ -249,6 +250,7 @@ early_param("idle", idle_setup);
+ void __show_regs(struct pt_regs * regs)
+ {
+ unsigned long fs, gs, shadowgs;
++ unsigned long d0, d1, d2, d3, d6, d7;
+ unsigned int fsindex,gsindex;
+ unsigned int ds,cs,es;
+
+@@ -288,6 +290,14 @@ void __show_regs(struct pt_regs * regs)
+ fs,fsindex,gs,gsindex,shadowgs);
+ printk("CS: %04x DS: %04x ES: %04x\n", cs, ds, es);
+
++ get_debugreg(d0, 0);
++ get_debugreg(d1, 1);
++ get_debugreg(d2, 2);
++ printk("DR0: %016lx DR1: %016lx DR2: %016lx\n", d0, d1, d2);
++ get_debugreg(d3, 3);
++ get_debugreg(d6, 6);
++ get_debugreg(d7, 7);
++ printk("DR3: %016lx DR6: %016lx DR7: %016lx\n", d3, d6, d7);
+ }
+
+ void show_regs(struct pt_regs *regs)
+Index: head-2008-12-01/arch/x86/kernel/setup_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -827,6 +827,8 @@ static void __cpuinit init_amd(struct cp
+ level = cpuid_eax(1);
+ if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
+ set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
++ if (c->x86 == 0x10)
++ set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
+
+ /* Enable workaround for FXSAVE leak */
+ if (c->x86 >= 6)
+@@ -852,8 +854,14 @@ static void __cpuinit init_amd(struct cp
+ if (c->extended_cpuid_level >= 0x80000008)
+ amd_detect_cmp(c);
+
+- /* Fix cpuid4 emulation for more */
+- num_cache_leaves = 3;
++ if (c->extended_cpuid_level >= 0x80000006 &&
++ (cpuid_edx(0x80000006) & 0xf000))
++ num_cache_leaves = 4;
++ else
++ num_cache_leaves = 3;
++
++ if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11)
++ set_bit(X86_FEATURE_K8, &c->x86_capability);
+
+ /* RDTSC can be speculated around */
+ clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
+@@ -1098,6 +1106,8 @@ void __cpuinit identify_cpu(struct cpuin
+ c->x86_capability[2] = cpuid_edx(0x80860001);
+ }
+
++ init_scattered_cpuid_features(c);
++
+ c->apicid = phys_pkg_id(0);
+
+ /*
+@@ -1183,7 +1193,7 @@ static int show_cpuinfo(struct seq_file
+ "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
+ "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
+ "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
+- "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
++ "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",
+
+ /* AMD-defined */
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+@@ -1199,10 +1209,11 @@ static int show_cpuinfo(struct seq_file
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* Other (Linux-defined) */
+- "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
+- "constant_tsc", NULL, NULL,
+- "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
++ NULL, NULL, NULL, NULL,
++ "constant_tsc", "up", NULL, "arch_perfmon",
++ "pebs", "bts", NULL, "sync_rdtsc",
++ "rep_good", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* Intel-defined (#2) */
+@@ -1213,7 +1224,7 @@ static int show_cpuinfo(struct seq_file
+
+ /* VIA/Cyrix/Centaur-defined */
+ NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ "ace2", "ace2_en", "phe", "phe_en", "pmm", "pmm_en", NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+@@ -1224,6 +1235,12 @@ static int show_cpuinfo(struct seq_file
+ "osvw", "ibs", NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++
++ /* Auxiliary (Linux-defined) */
++ "ida", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
++ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ };
+ static char *x86_power_flags[] = {
+ "ts", /* temperature sensor */
+Index: head-2008-12-01/arch/x86/kernel/setup64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -125,11 +125,14 @@ void __init setup_per_cpu_areas(void)
+ }
+
+ #ifdef CONFIG_XEN
+-static void switch_pt(void)
++static void __init_refok switch_pt(int cpu)
+ {
++ if (cpu == 0)
++ xen_init_pt();
+ xen_pt_switch(__pa_symbol(init_level4_pgt));
+ xen_new_user_pt(__pa_symbol(__user_pgd(init_level4_pgt)));
+ }
++#define switch_pt() switch_pt(cpu)
+
+ static void __cpuinit cpu_gdt_init(const struct desc_ptr *gdt_descr)
+ {
+@@ -185,9 +188,6 @@ void pda_init(int cpu)
+ pda->mmu_state = 0;
+
+ if (cpu == 0) {
+-#ifdef CONFIG_XEN
+- xen_init_pt();
+-#endif
+ /* others are initialized in smpboot.c */
+ pda->pcurrent = &init_task;
+ pda->irqstackptr = boot_cpu_stack;
+Index: head-2008-12-01/arch/x86/kernel/smp_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -362,7 +362,7 @@ __smp_call_function_single(int cpu, void
+ }
+
+ /*
+- * smp_call_function_single - Run a function on another CPU
++ * smp_call_function_single - Run a function on a specific CPU
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @nonatomic: Currently unused.
+@@ -379,17 +379,21 @@ int smp_call_function_single (int cpu, v
+ {
+ /* prevent preemption and reschedule on another processor */
+ int me = get_cpu();
++
++ /* Can deadlock when called with interrupts disabled */
++ WARN_ON(irqs_disabled());
++
+ if (cpu == me) {
++ local_irq_disable();
++ func(info);
++ local_irq_enable();
+ put_cpu();
+ return 0;
+ }
+
+- /* Can deadlock when called with interrupts disabled */
+- WARN_ON(irqs_disabled());
+-
+- spin_lock_bh(&call_lock);
++ spin_lock(&call_lock);
+ __smp_call_function_single(cpu, func, info, nonatomic, wait);
+- spin_unlock_bh(&call_lock);
++ spin_unlock(&call_lock);
+ put_cpu();
+ return 0;
+ }
+Index: head-2008-12-01/arch/x86/kernel/traps_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -34,6 +34,10 @@
+ #include <linux/bug.h>
+ #include <linux/kdebug.h>
+
++#if defined(CONFIG_EDAC)
++#include <linux/edac.h>
++#endif
++
+ #include <asm/system.h>
+ #include <asm/io.h>
+ #include <asm/atomic.h>
+@@ -332,6 +336,7 @@ static int print_trace_stack(void *data,
+
+ static void print_trace_address(void *data, unsigned long addr)
+ {
++ touch_nmi_watchdog();
+ printk_address(addr);
+ }
+
+@@ -520,6 +525,7 @@ void __kprobes __die(const char * str, s
+ printk("\n");
+ notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV);
+ show_registers(regs);
++ add_taint(TAINT_DIE);
+ /* Executive summary in case the oops scrolled away */
+ printk(KERN_ALERT "RIP ");
+ printk_address(regs->rip);
+@@ -533,7 +539,7 @@ void die(const char * str, struct pt_reg
+ unsigned long flags = oops_begin();
+
+ if (!user_mode(regs))
+- report_bug(regs->rip);
++ report_bug(regs->rip, regs);
+
+ __die(str, regs, err);
+ oops_end(flags);
+@@ -582,7 +588,8 @@ static void __kprobes do_trap(int trapnr
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_no = trapnr;
+
+- if (exception_trace && unhandled_signal(tsk, signr))
++ if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
++ printk_ratelimit())
+ printk(KERN_INFO
+ "%s[%d] trap %s rip:%lx rsp:%lx error:%lx\n",
+ tsk->comm, tsk->pid, str,
+@@ -686,7 +693,8 @@ asmlinkage void __kprobes do_general_pro
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_no = 13;
+
+- if (exception_trace && unhandled_signal(tsk, SIGSEGV))
++ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
++ printk_ratelimit())
+ printk(KERN_INFO
+ "%s[%d] general protection rip:%lx rsp:%lx error:%lx\n",
+ tsk->comm, tsk->pid,
+@@ -721,6 +729,13 @@ mem_parity_error(unsigned char reason, s
+ reason);
+ printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
+
++#if defined(CONFIG_EDAC)
++ if(edac_handler_set()) {
++ edac_atomic_assert_error();
++ return;
++ }
++#endif
++
+ if (panic_on_unrecovered_nmi)
+ panic("NMI: Not continuing");
+
+Index: head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -42,6 +42,7 @@
+ #include <asm/segment.h>
+ #include <asm/desc.h>
+ #include <asm/topology.h>
++#include <asm/vgtod.h>
+
+ #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
+ #define __syscall_clobber "r11","rcx","memory"
+@@ -57,26 +58,9 @@
+ * - writen by timer interrupt or systcl (/proc/sys/kernel/vsyscall64)
+ * Try to keep this structure as small as possible to avoid cache line ping pongs
+ */
+-struct vsyscall_gtod_data_t {
+- seqlock_t lock;
+-
+- /* open coded 'struct timespec' */
+- time_t wall_time_sec;
+- u32 wall_time_nsec;
+-
+- int sysctl_enabled;
+- struct timezone sys_tz;
+- struct { /* extract of a clocksource struct */
+- cycle_t (*vread)(void);
+- cycle_t cycle_last;
+- cycle_t mask;
+- u32 mult;
+- u32 shift;
+- } clock;
+-};
+ int __vgetcpu_mode __section_vgetcpu_mode;
+
+-struct vsyscall_gtod_data_t __vsyscall_gtod_data __section_vsyscall_gtod_data =
++struct vsyscall_gtod_data __vsyscall_gtod_data __section_vsyscall_gtod_data =
+ {
+ .lock = SEQLOCK_UNLOCKED,
+ .sysctl_enabled = 1,
+@@ -96,6 +80,8 @@ void update_vsyscall(struct timespec *wa
+ vsyscall_gtod_data.wall_time_sec = wall_time->tv_sec;
+ vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
+ vsyscall_gtod_data.sys_tz = sys_tz;
++ vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
++ vsyscall_gtod_data.wall_to_monotonic = wall_to_monotonic;
+ write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
+ }
+
+Index: head-2008-12-01/arch/x86/mm/fault_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -159,7 +159,9 @@ void dump_pagetable(unsigned long addres
+ pmd_t *pmd;
+ pte_t *pte;
+
+- pgd = __va(read_cr3() & PHYSICAL_PAGE_MASK);
++ pgd = (pgd_t *)read_cr3();
++
++ pgd = __va((unsigned long)pgd & PHYSICAL_PAGE_MASK);
+ pgd += pgd_index(address);
+ if (bad_address(pgd)) goto bad;
+ printk("PGD %lx ", pgd_val(*pgd));
+@@ -219,16 +221,6 @@ static int is_errata93(struct pt_regs *r
+ return 0;
+ }
+
+-int unhandled_signal(struct task_struct *tsk, int sig)
+-{
+- if (is_init(tsk))
+- return 1;
+- if (tsk->ptrace & PT_PTRACED)
+- return 0;
+- return (tsk->sighand->action[sig-1].sa.sa_handler == SIG_IGN) ||
+- (tsk->sighand->action[sig-1].sa.sa_handler == SIG_DFL);
+-}
+-
+ static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs,
+ unsigned long error_code)
+ {
+@@ -302,8 +294,8 @@ static int vmalloc_fault(unsigned long a
+ return 0;
+ }
+
+-int page_fault_trace = 0;
+-int exception_trace = 1;
++static int page_fault_trace;
++int show_unhandled_signals = 1;
+
+
+ #define MEM_VERBOSE 1
+@@ -372,7 +364,7 @@ asmlinkage void __kprobes do_page_fault(
+ struct vm_area_struct * vma;
+ unsigned long address;
+ const struct exception_table_entry *fixup;
+- int write;
++ int write, fault;
+ unsigned long flags;
+ siginfo_t info;
+
+@@ -384,7 +376,7 @@ asmlinkage void __kprobes do_page_fault(
+ prefetchw(&mm->mmap_sem);
+
+ /* get the address */
+- address = current_vcpu_info()->arch.cr2;
++ address = read_cr2();
+
+ info.si_code = SEGV_MAPERR;
+
+@@ -445,6 +437,13 @@ asmlinkage void __kprobes do_page_fault(
+ if (unlikely(in_atomic() || !mm))
+ goto bad_area_nosemaphore;
+
++ /*
++ * User-mode registers count as a user access even for any
++ * potential system fault or CPU buglet.
++ */
++ if (user_mode_vm(regs))
++ error_code |= PF_USER;
++
+ again:
+ /* When running in the kernel we expect faults to occur only to
+ * addresses in user space. All other faults represent errors in the
+@@ -511,19 +510,18 @@ good_area:
+ * make sure we exit gracefully rather than endlessly redo
+ * the fault.
+ */
+- switch (handle_mm_fault(mm, vma, address, write)) {
+- case VM_FAULT_MINOR:
+- tsk->min_flt++;
+- break;
+- case VM_FAULT_MAJOR:
+- tsk->maj_flt++;
+- break;
+- case VM_FAULT_SIGBUS:
+- goto do_sigbus;
+- default:
+- goto out_of_memory;
++ fault = handle_mm_fault(mm, vma, address, write);
++ if (unlikely(fault & VM_FAULT_ERROR)) {
++ if (fault & VM_FAULT_OOM)
++ goto out_of_memory;
++ else if (fault & VM_FAULT_SIGBUS)
++ goto do_sigbus;
++ BUG();
+ }
+-
++ if (fault & VM_FAULT_MAJOR)
++ tsk->maj_flt++;
++ else
++ tsk->min_flt++;
+ up_read(&mm->mmap_sem);
+ return;
+
+@@ -556,7 +554,8 @@ bad_area_nosemaphore:
+ (address >> 32))
+ return;
+
+- if (exception_trace && unhandled_signal(tsk, SIGSEGV)) {
++ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
++ printk_ratelimit()) {
+ printk(
+ "%s%s[%d]: segfault at %016lx rip %016lx rsp %016lx error %lx\n",
+ tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
+@@ -630,7 +629,7 @@ out_of_memory:
+ }
+ printk("VM: killing process %s\n", tsk->comm);
+ if (error_code & 4)
+- do_exit(SIGKILL);
++ do_group_exit(SIGKILL);
+ goto no_context;
+
+ do_sigbus:
+Index: head-2008-12-01/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -66,6 +66,9 @@ int after_bootmem;
+ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+ extern unsigned long start_pfn;
+
++extern pmd_t level2_fixmap_pgt[PTRS_PER_PMD];
++extern pte_t level1_fixmap_pgt[PTRS_PER_PTE];
++
+ /*
+ * Use this until direct mapping is established, i.e. before __va() is
+ * available in init_memory_mapping().
+@@ -362,6 +365,10 @@ __set_fixmap (enum fixed_addresses idx,
+ set_pte_phys(address, phys, prot, 0);
+ set_pte_phys(address, phys, prot, 1);
+ break;
++ case FIX_EARLYCON_MEM_BASE:
++ xen_l1_entry_update(level1_fixmap_pgt + pte_index(address),
++ pfn_pte_ma(phys >> PAGE_SHIFT, prot));
++ break;
+ default:
+ set_pte_phys_ma(address, phys, prot);
+ break;
+@@ -594,6 +601,13 @@ void __init xen_init_pt(void)
+ __user_pgd(init_level4_pgt)[pgd_index(VSYSCALL_START)] =
+ __pgd(__pa_symbol(level3_user_pgt) | _PAGE_TABLE);
+
++ /* Do an early initialization of the fixmap area. */
++ addr = __fix_to_virt(FIX_EARLYCON_MEM_BASE);
++ level3_kernel_pgt[pud_index(addr)] =
++ __pud(__pa_symbol(level2_fixmap_pgt) | _PAGE_TABLE);
++ level2_fixmap_pgt[pmd_index(addr)] =
++ __pmd(__pa_symbol(level1_fixmap_pgt) | _PAGE_TABLE);
++
+ early_make_page_readonly(init_level4_pgt,
+ XENFEAT_writable_page_tables);
+ early_make_page_readonly(__user_pgd(init_level4_pgt),
+@@ -604,6 +618,10 @@ void __init xen_init_pt(void)
+ XENFEAT_writable_page_tables);
+ early_make_page_readonly(level2_kernel_pgt,
+ XENFEAT_writable_page_tables);
++ early_make_page_readonly(level2_fixmap_pgt,
++ XENFEAT_writable_page_tables);
++ early_make_page_readonly(level1_fixmap_pgt,
++ XENFEAT_writable_page_tables);
+
+ if (!xen_feature(XENFEAT_writable_page_tables)) {
+ xen_pgd_pin(__pa_symbol(init_level4_pgt));
+@@ -807,7 +825,7 @@ void __init paging_init(void)
+ sparse_init();
+ free_area_init_nodes(max_zone_pfns);
+
+- init_mm.context.pinned = 1;
++ SetPagePinned(virt_to_page(init_mm.pgd));
+ }
+ #endif
+
+@@ -1120,41 +1138,6 @@ int kern_addr_valid(unsigned long addr)
+ return pfn_valid(pte_pfn(*pte));
+ }
+
+-#ifdef CONFIG_SYSCTL
+-#include <linux/sysctl.h>
+-
+-extern int exception_trace, page_fault_trace;
+-
+-static ctl_table debug_table2[] = {
+- {
+- .ctl_name = 99,
+- .procname = "exception-trace",
+- .data = &exception_trace,
+- .maxlen = sizeof(int),
+- .mode = 0644,
+- .proc_handler = proc_dointvec
+- },
+- {}
+-};
+-
+-static ctl_table debug_root_table2[] = {
+- {
+- .ctl_name = CTL_DEBUG,
+- .procname = "debug",
+- .mode = 0555,
+- .child = debug_table2
+- },
+- {}
+-};
+-
+-static __init int x8664_sysctl_init(void)
+-{
+- register_sysctl_table(debug_root_table2);
+- return 0;
+-}
+-__initcall(x8664_sysctl_init);
+-#endif
+-
+ /* A pseudo VMA to allow ptrace access for the vsyscall page. This only
+ covers the 64bit vsyscall page now. 32bit has a real VMA now and does
+ not need special handling anymore. */
+@@ -1193,9 +1176,18 @@ int in_gate_area_no_task(unsigned long a
+ }
+
+ #ifndef CONFIG_XEN
+-void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
++void * __init alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
+ {
+ return __alloc_bootmem_core(pgdat->bdata, size,
+ SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0);
+ }
+ #endif
++
++const char *arch_vma_name(struct vm_area_struct *vma)
++{
++ if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso)
++ return "[vdso]";
++ if (vma == &gate_vma)
++ return "[vsyscall]";
++ return NULL;
++}
+Index: head-2008-12-01/arch/x86/mm/pageattr_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pageattr_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pageattr_64-xen.c 2008-12-01 11:36:47.000000000 +0100
+@@ -171,7 +171,7 @@ void mm_pin(struct mm_struct *mm)
+ mm_walk(mm, PAGE_KERNEL_RO);
+ xen_pgd_pin(__pa(mm->pgd)); /* kernel */
+ xen_pgd_pin(__pa(__user_pgd(mm->pgd))); /* user */
+- mm->context.pinned = 1;
++ SetPagePinned(virt_to_page(mm->pgd));
+ spin_lock(&mm_unpinned_lock);
+ list_del(&mm->context.unpinned);
+ spin_unlock(&mm_unpinned_lock);
+@@ -189,7 +189,7 @@ void mm_unpin(struct mm_struct *mm)
+ xen_pgd_unpin(__pa(mm->pgd));
+ xen_pgd_unpin(__pa(__user_pgd(mm->pgd)));
+ mm_walk(mm, PAGE_KERNEL);
+- mm->context.pinned = 0;
++ ClearPagePinned(virt_to_page(mm->pgd));
+ spin_lock(&mm_unpinned_lock);
+ list_add(&mm->context.unpinned, &mm_unpinned);
+ spin_unlock(&mm_unpinned_lock);
+@@ -217,7 +217,7 @@ void mm_pin_all(void)
+
+ void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+ {
+- if (!mm->context.pinned)
++ if (!PagePinned(virt_to_page(mm->pgd)))
+ mm_pin(mm);
+ }
+
+@@ -243,8 +243,9 @@ void arch_exit_mmap(struct mm_struct *mm
+
+ task_unlock(tsk);
+
+- if ( mm->context.pinned && (atomic_read(&mm->mm_count) == 1) &&
+- !mm->context.has_foreign_mappings )
++ if (PagePinned(virt_to_page(mm->pgd))
++ && (atomic_read(&mm->mm_count) == 1)
++ && !mm->context.has_foreign_mappings)
+ mm_unpin(mm);
+ }
+
+@@ -343,14 +344,13 @@ static void flush_kernel_map(void *arg)
+ struct page *pg;
+
+ /* When clflush is available always use it because it is
+- much cheaper than WBINVD. Disable clflush for now because
+- the high level code is not ready yet */
++ much cheaper than WBINVD. */
++ /* clflush is still broken. Disable for now. */
+ if (1 || !cpu_has_clflush)
+ asm volatile("wbinvd" ::: "memory");
+ else list_for_each_entry(pg, l, lru) {
+ void *adr = page_address(pg);
+- if (cpu_has_clflush)
+- cache_flush_page(adr);
++ cache_flush_page(adr);
+ }
+ __flush_tlb_all();
+ }
+@@ -364,7 +364,8 @@ static LIST_HEAD(deferred_pages); /* pro
+
+ static inline void save_page(struct page *fpage)
+ {
+- list_add(&fpage->lru, &deferred_pages);
++ if (!test_and_set_bit(PG_arch_1, &fpage->flags))
++ list_add(&fpage->lru, &deferred_pages);
+ }
+
+ /*
+@@ -398,9 +399,12 @@ __change_page_attr(unsigned long address
+ pte_t *kpte;
+ struct page *kpte_page;
+ pgprot_t ref_prot2;
++
+ kpte = lookup_address(address);
+ if (!kpte) return 0;
+ kpte_page = virt_to_page(((unsigned long)kpte) & PAGE_MASK);
++ BUG_ON(PageLRU(kpte_page));
++ BUG_ON(PageCompound(kpte_page));
+ if (pgprot_val(prot) != pgprot_val(ref_prot)) {
+ if (!pte_huge(*kpte)) {
+ set_pte(kpte, pfn_pte(pfn, prot));
+@@ -439,10 +443,9 @@ __change_page_attr(unsigned long address
+ return 0;
+ #endif
+
+- if (page_private(kpte_page) == 0) {
+- save_page(kpte_page);
++ save_page(kpte_page);
++ if (page_private(kpte_page) == 0)
+ revert_page(address, ref_prot);
+- }
+ return 0;
+ }
+
+@@ -514,6 +517,10 @@ void global_flush_tlb(void)
+ flush_map(&l);
+
+ list_for_each_entry_safe(pg, next, &l, lru) {
++ list_del(&pg->lru);
++ clear_bit(PG_arch_1, &pg->flags);
++ if (page_private(pg) != 0)
++ continue;
+ ClearPagePrivate(pg);
+ __free_page(pg);
+ }
+Index: head-2008-12-01/arch/x86/vdso/vdso32/note.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/vdso/vdso32/note.S 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/arch/x86/vdso/vdso32/note.S 2008-12-01 11:36:47.000000000 +0100
+@@ -13,7 +13,7 @@ ELFNOTE_START(Linux, 0, "a")
+ .long LINUX_VERSION_CODE
+ ELFNOTE_END
+
+-#ifdef CONFIG_XEN
++#if defined(CONFIG_X86_XEN) || defined(CONFIG_PARAVIRT_XEN)
+ /*
+ * Add a special note telling glibc's dynamic linker a fake hardware
+ * flavor that it will use to choose the search path for libraries in the
+@@ -37,8 +37,12 @@ ELFNOTE_END
+
+ ELFNOTE_START(GNU, 2, "a")
+ .long 1 /* ncaps */
++#ifdef CONFIG_PARAVIRT_XEN
+ VDSO32_NOTE_MASK: /* Symbol used by arch/x86/xen/setup.c */
+ .long 0 /* mask */
++#else
++ .long 1 << VDSO_NOTE_NONEGSEG_BIT /* mask */
++#endif
+ .byte VDSO_NOTE_NONEGSEG_BIT; .asciz "nosegneg" /* bit, name */
+ ELFNOTE_END
+ #endif
+Index: head-2008-12-01/drivers/Makefile
+===================================================================
+--- head-2008-12-01.orig/drivers/Makefile 2008-12-01 11:11:03.000000000 +0100
++++ head-2008-12-01/drivers/Makefile 2008-12-01 11:36:47.000000000 +0100
+@@ -16,7 +16,7 @@ obj-$(CONFIG_ACPI) += acpi/
+ obj-$(CONFIG_PNP) += pnp/
+ obj-$(CONFIG_ARM_AMBA) += amba/
+
+-obj-$(CONFIG_XEN) += xen/
++obj-$(CONFIG_PARAVIRT_XEN) += xen/
+
+ # char/ comes before serial/ etc so that the VT console is the boot-time
+ # default.
+Index: head-2008-12-01/drivers/block/Kconfig
+===================================================================
+--- head-2008-12-01.orig/drivers/block/Kconfig 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/drivers/block/Kconfig 2008-12-01 11:36:47.000000000 +0100
+@@ -423,9 +423,9 @@ config XILINX_SYSACE
+ help
+ Include support for the Xilinx SystemACE CompactFlash interface
+
+-config XEN_BLKDEV_FRONTEND
++config XEN_BLKFRONT
+ tristate "Xen virtual block device support"
+- depends on XEN
++ depends on PARAVIRT_XEN
+ default y
+ help
+ This driver implements the front-end of the Xen virtual
+Index: head-2008-12-01/drivers/block/Makefile
+===================================================================
+--- head-2008-12-01.orig/drivers/block/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/drivers/block/Makefile 2008-12-01 11:36:47.000000000 +0100
+@@ -31,4 +31,4 @@ obj-$(CONFIG_BLK_DEV_SX8) += sx8.o
+ obj-$(CONFIG_BLK_DEV_UB) += ub.o
+ obj-$(CONFIG_BLK_DEV_HD) += hd.o
+
+-obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o
++obj-$(CONFIG_XEN_BLKFRONT) += xen-blkfront.o
+Index: head-2008-12-01/drivers/block/xen-blkfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/block/xen-blkfront.c 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/drivers/block/xen-blkfront.c 2008-12-01 11:36:47.000000000 +0100
+@@ -1021,7 +1021,6 @@ static struct xenbus_device_id blkfront_
+
+ static struct xenbus_driver blkfront = {
+ .name = "vbd",
+- .owner = THIS_MODULE,
+ .ids = blkfront_ids,
+ .probe = blkfront_probe,
+ .remove = blkfront_remove,
+Index: head-2008-12-01/drivers/char/Kconfig
+===================================================================
+--- head-2008-12-01.orig/drivers/char/Kconfig 2008-11-10 11:49:15.000000000 +0100
++++ head-2008-12-01/drivers/char/Kconfig 2008-12-01 11:36:47.000000000 +0100
+@@ -624,7 +624,7 @@ config HVC_BEAT
+
+ config HVC_XEN
+ bool "Xen Hypervisor Console support"
+- depends on XEN
++ depends on PARAVIRT_XEN
+ select HVC_DRIVER
+ select HVC_IRQ
+ default y
+Index: head-2008-12-01/drivers/net/Kconfig
+===================================================================
+--- head-2008-12-01.orig/drivers/net/Kconfig 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/drivers/net/Kconfig 2008-12-01 11:36:47.000000000 +0100
+@@ -2535,9 +2535,9 @@ source "drivers/atm/Kconfig"
+
+ source "drivers/s390/net/Kconfig"
+
+-config XEN_NETDEV_FRONTEND
++config XEN_NETFRONT
+ tristate "Xen network device frontend driver"
+- depends on XEN
++ depends on PARAVIRT_XEN
+ default y
+ help
+ The network device frontend driver allows the kernel to
+Index: head-2008-12-01/drivers/net/Makefile
+===================================================================
+--- head-2008-12-01.orig/drivers/net/Makefile 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/drivers/net/Makefile 2008-12-01 11:36:47.000000000 +0100
+@@ -142,7 +142,7 @@ obj-$(CONFIG_PPPOL2TP) += pppox.o pppol2
+ obj-$(CONFIG_SLIP) += slip.o
+ obj-$(CONFIG_SLHC) += slhc.o
+
+-obj-$(CONFIG_XEN_NETDEV_FRONTEND) += xen-netfront.o
++obj-$(CONFIG_XEN_NETFRONT) += xen-netfront.o
+
+ obj-$(CONFIG_DUMMY) += dummy.o
+ obj-$(CONFIG_IFB) += ifb.o
+Index: head-2008-12-01/drivers/net/xen-netfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/net/xen-netfront.c 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/drivers/net/xen-netfront.c 2008-12-01 11:36:47.000000000 +0100
+@@ -36,8 +36,6 @@
+ #include <linux/skbuff.h>
+ #include <linux/ethtool.h>
+ #include <linux/if_ether.h>
+-#include <linux/tcp.h>
+-#include <linux/udp.h>
+ #include <linux/moduleparam.h>
+ #include <linux/mm.h>
+ #include <net/ip.h>
+@@ -765,45 +763,6 @@ static RING_IDX xennet_fill_frags(struct
+ return cons;
+ }
+
+-static int skb_checksum_setup(struct sk_buff *skb)
+-{
+- struct iphdr *iph;
+- unsigned char *th;
+- int err = -EPROTO;
+-
+- if (skb->protocol != htons(ETH_P_IP))
+- goto out;
+-
+- iph = (void *)skb->data;
+- th = skb->data + 4 * iph->ihl;
+- if (th >= skb_tail_pointer(skb))
+- goto out;
+-
+- skb->csum_start = th - skb->head;
+- switch (iph->protocol) {
+- case IPPROTO_TCP:
+- skb->csum_offset = offsetof(struct tcphdr, check);
+- break;
+- case IPPROTO_UDP:
+- skb->csum_offset = offsetof(struct udphdr, check);
+- break;
+- default:
+- if (net_ratelimit())
+- printk(KERN_ERR "Attempting to checksum a non-"
+- "TCP/UDP packet, dropping a protocol"
+- " %d packet", iph->protocol);
+- goto out;
+- }
+-
+- if ((th + skb->csum_offset + 2) > skb_tail_pointer(skb))
+- goto out;
+-
+- err = 0;
+-
+-out:
+- return err;
+-}
+-
+ static int handle_incoming_queue(struct net_device *dev,
+ struct sk_buff_head *rxq)
+ {
+@@ -1784,7 +1743,6 @@ static int __devexit xennet_remove(struc
+
+ static struct xenbus_driver netfront = {
+ .name = "vif",
+- .owner = THIS_MODULE,
+ .ids = netfront_ids,
+ .probe = netfront_probe,
+ .remove = __devexit_p(xennet_remove),
+Index: head-2008-12-01/drivers/xen/Makefile
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/Makefile 2008-12-01 11:22:58.000000000 +0100
++++ head-2008-12-01/drivers/xen/Makefile 2008-12-01 11:36:47.000000000 +0100
+@@ -1,10 +1,12 @@
+-obj-y += core/
+-obj-y += console/
+-obj-y += evtchn/
+-obj-y += xenbus/
+-obj-y += char/
++obj-$(CONFIG_PARAVIRT_XEN) += grant-table.o
+
+-obj-y += util.o
++obj-$(CONFIG_XEN) += core/
++obj-$(CONFIG_XEN) += console/
++obj-$(CONFIG_XEN) += evtchn/
++obj-y += xenbus/
++obj-$(CONFIG_XEN) += char/
++
++obj-$(CONFIG_XEN) += util.o
+ obj-$(CONFIG_XEN_BALLOON) += balloon/
+ obj-$(CONFIG_XEN_BLKDEV_BACKEND) += blkback/
+ obj-$(CONFIG_XEN_BLKDEV_TAP) += blktap/
+Index: head-2008-12-01/drivers/xen/blkback/blkback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/blkback.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkback/blkback.c 2008-12-01 11:36:47.000000000 +0100
+@@ -154,7 +154,7 @@ static void unplug_queue(blkif_t *blkif)
+
+ static void plug_queue(blkif_t *blkif, struct block_device *bdev)
+ {
+- request_queue_t *q = bdev_get_queue(bdev);
++ struct request_queue *q = bdev_get_queue(bdev);
+
+ if (q == blkif->plug)
+ return;
+Index: head-2008-12-01/drivers/xen/blkback/common.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/common.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkback/common.h 2008-12-01 11:36:47.000000000 +0100
+@@ -79,7 +79,7 @@ typedef struct blkif_st {
+ wait_queue_head_t wq;
+ struct task_struct *xenblkd;
+ unsigned int waiting_reqs;
+- request_queue_t *plug;
++ struct request_queue *plug;
+
+ /* statistics */
+ unsigned long st_print;
+Index: head-2008-12-01/drivers/xen/blkback/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/interface.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkback/interface.c 2008-12-01 11:36:47.000000000 +0100
+@@ -177,5 +177,5 @@ void blkif_free(blkif_t *blkif)
+ void __init blkif_interface_init(void)
+ {
+ blkif_cachep = kmem_cache_create("blkif_cache", sizeof(blkif_t),
+- 0, 0, NULL, NULL);
++ 0, 0, NULL);
+ }
+Index: head-2008-12-01/drivers/xen/blkfront/blkfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkfront/blkfront.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkfront/blkfront.c 2008-12-01 11:36:47.000000000 +0100
+@@ -667,7 +667,7 @@ static int blkif_queue_request(struct re
+ * do_blkif_request
+ * read a block; request is in a request queue
+ */
+-void do_blkif_request(request_queue_t *rq)
++void do_blkif_request(struct request_queue *rq)
+ {
+ struct blkfront_info *info = NULL;
+ struct request *req;
+Index: head-2008-12-01/drivers/xen/blkfront/block.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkfront/block.h 2008-08-07 12:44:36.000000000 +0200
++++ head-2008-12-01/drivers/xen/blkfront/block.h 2008-12-01 11:36:47.000000000 +0100
+@@ -105,7 +105,7 @@ struct blkfront_info
+ blkif_front_ring_t ring;
+ unsigned int irq;
+ struct xlbd_major_info *mi;
+- request_queue_t *rq;
++ struct request_queue *rq;
+ struct work_struct work;
+ struct gnttab_free_callback callback;
+ struct blk_shadow shadow[BLK_RING_SIZE];
+@@ -129,7 +129,7 @@ extern int blkif_ioctl(struct inode *ino
+ extern int blkif_getgeo(struct block_device *, struct hd_geometry *);
+ extern int blkif_check(dev_t dev);
+ extern int blkif_revalidate(dev_t dev);
+-extern void do_blkif_request (request_queue_t *rq);
++extern void do_blkif_request (struct request_queue *rq);
+
+ /* Virtual block-device subsystem. */
+ /* Note that xlvbd_add doesn't call add_disk for you: you're expected
+Index: head-2008-12-01/drivers/xen/blkfront/vbd.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkfront/vbd.c 2008-08-07 12:44:36.000000000 +0200
++++ head-2008-12-01/drivers/xen/blkfront/vbd.c 2008-12-01 11:36:47.000000000 +0100
+@@ -211,7 +211,7 @@ xlbd_put_major_info(struct xlbd_major_in
+ static int
+ xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
+ {
+- request_queue_t *rq;
++ struct request_queue *rq;
+
+ rq = blk_init_queue(do_blkif_request, &blkif_io_lock);
+ if (rq == NULL)
+Index: head-2008-12-01/drivers/xen/blktap/common.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blktap/common.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/blktap/common.h 2008-12-01 11:36:47.000000000 +0100
+@@ -68,7 +68,7 @@ typedef struct blkif_st {
+ wait_queue_head_t wq;
+ struct task_struct *xenblkd;
+ unsigned int waiting_reqs;
+- request_queue_t *plug;
++ struct request_queue *plug;
+
+ /* statistics */
+ unsigned long st_print;
+Index: head-2008-12-01/drivers/xen/blktap/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blktap/interface.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/drivers/xen/blktap/interface.c 2008-12-01 11:36:47.000000000 +0100
+@@ -177,5 +177,5 @@ void tap_blkif_kmem_cache_free(blkif_t *
+ void __init tap_blkif_interface_init(void)
+ {
+ blkif_cachep = kmem_cache_create("blktapif_cache", sizeof(blkif_t),
+- 0, 0, NULL, NULL);
++ 0, 0, NULL);
+ }
+Index: head-2008-12-01/drivers/xen/core/features.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/features.c 2007-06-12 13:13:44.000000000 +0200
++++ head-2008-12-01/drivers/xen/core/features.c 2008-12-01 11:36:47.000000000 +0100
+@@ -19,7 +19,7 @@ u8 xen_features[XENFEAT_NR_SUBMAPS * 32]
+ /* Not a GPL symbol: used in ubiquitous macros, so too restrictive. */
+ EXPORT_SYMBOL(xen_features);
+
+-void setup_xen_features(void)
++void xen_setup_features(void)
+ {
+ xen_feature_info_t fi;
+ int i, j;
+Index: head-2008-12-01/drivers/xen/core/reboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/reboot.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/reboot.c 2008-12-01 11:36:47.000000000 +0100
+@@ -4,6 +4,7 @@
+ #include <linux/unistd.h>
+ #include <linux/module.h>
+ #include <linux/reboot.h>
++#include <linux/sched.h>
+ #include <linux/sysrq.h>
+ #include <asm/hypervisor.h>
+ #include <xen/xenbus.h>
+Index: head-2008-12-01/drivers/xen/scsiback/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsiback/interface.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsiback/interface.c 2008-12-01 11:36:47.000000000 +0100
+@@ -167,7 +167,7 @@ void scsiback_free(struct vscsibk_info *
+ int __init scsiback_interface_init(void)
+ {
+ scsiback_cachep = kmem_cache_create("vscsiif_cache",
+- sizeof(struct vscsibk_info), 0, 0, NULL, NULL);
++ sizeof(struct vscsibk_info), 0, 0, NULL);
+ if (!scsiback_cachep) {
+ printk(KERN_ERR "scsiback: can't init scsi cache\n");
+ return -ENOMEM;
+Index: head-2008-12-01/drivers/xen/scsifront/scsifront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsifront/scsifront.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsifront/scsifront.c 2008-12-01 11:36:47.000000000 +0100
+@@ -147,7 +147,7 @@ static void scsifront_cdb_cmd_done(struc
+ add_id_to_freelist(info, id);
+
+ sc->result = ring_res->rslt;
+- sc->resid = ring_res->residual_len;
++ scsi_set_resid(sc, ring_res->residual_len);
+
+ if (ring_res->sense_len > VSCSIIF_SENSE_BUFFERSIZE)
+ sense_len = VSCSIIF_SENSE_BUFFERSIZE;
+Index: head-2008-12-01/drivers/xen/tpmback/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/tpmback/interface.c 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/drivers/xen/tpmback/interface.c 2008-12-01 11:36:47.000000000 +0100
+@@ -12,6 +12,7 @@
+ */
+
+ #include "common.h"
++#include <linux/err.h>
+ #include <xen/balloon.h>
+ #include <xen/gnttab.h>
+
+@@ -159,7 +160,7 @@ void tpmif_disconnect_complete(tpmif_t *
+ int __init tpmif_interface_init(void)
+ {
+ tpmif_cachep = kmem_cache_create("tpmif_cache", sizeof (tpmif_t),
+- 0, 0, NULL, NULL);
++ 0, 0, NULL);
+ return tpmif_cachep ? 0 : -ENOMEM;
+ }
+
+Index: head-2008-12-01/drivers/xen/util.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/util.c 2007-07-10 09:42:30.000000000 +0200
++++ head-2008-12-01/drivers/xen/util.c 2008-12-01 11:36:47.000000000 +0100
+@@ -1,8 +1,5 @@
+-#include <linux/mm.h>
++#include <linux/err.h>
+ #include <linux/module.h>
+-#include <linux/slab.h>
+-#include <linux/vmalloc.h>
+-#include <asm/uaccess.h>
+ #include <xen/driver_util.h>
+
+ struct class *get_xen_class(void)
+@@ -21,45 +18,3 @@ struct class *get_xen_class(void)
+ return xen_class;
+ }
+ EXPORT_SYMBOL_GPL(get_xen_class);
+-
+-#ifdef CONFIG_X86
+-static int f(pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
+-{
+- /* apply_to_page_range() does all the hard work. */
+- return 0;
+-}
+-
+-struct vm_struct *alloc_vm_area(unsigned long size)
+-{
+- struct vm_struct *area;
+-
+- area = get_vm_area(size, VM_IOREMAP);
+- if (area == NULL)
+- return NULL;
+-
+- /*
+- * This ensures that page tables are constructed for this region
+- * of kernel virtual address space and mapped into init_mm.
+- */
+- if (apply_to_page_range(&init_mm, (unsigned long)area->addr,
+- area->size, f, NULL)) {
+- free_vm_area(area);
+- return NULL;
+- }
+-
+- /* Map page directories into every address space. */
+- vmalloc_sync_all();
+-
+- return area;
+-}
+-EXPORT_SYMBOL_GPL(alloc_vm_area);
+-
+-void free_vm_area(struct vm_struct *area)
+-{
+- struct vm_struct *ret;
+- ret = remove_vm_area(area->addr);
+- BUG_ON(ret != area);
+- kfree(area);
+-}
+-EXPORT_SYMBOL_GPL(free_vm_area);
+-#endif /* CONFIG_X86 */
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_client.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_client.c 2008-12-01 11:22:58.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_client.c 2008-12-01 11:36:47.000000000 +0100
+@@ -30,19 +30,26 @@
+ * IN THE SOFTWARE.
+ */
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ #include <linux/slab.h>
+ #include <xen/evtchn.h>
+ #include <xen/gnttab.h>
+-#include <xen/xenbus.h>
+ #include <xen/driver_util.h>
++#else
++#include <linux/types.h>
++#include <linux/vmalloc.h>
++#include <asm/xen/hypervisor.h>
++#include <xen/interface/xen.h>
++#include <xen/interface/event_channel.h>
++#include <xen/events.h>
++#include <xen/grant_table.h>
++#endif
++#include <xen/xenbus.h>
+
+ #ifdef HAVE_XEN_PLATFORM_COMPAT_H
+ #include <xen/platform-compat.h>
+ #endif
+
+-#define DPRINTK(fmt, args...) \
+- pr_debug("xenbus_client (%s:%d) " fmt ".\n", __FUNCTION__, __LINE__, ##args)
+-
+ const char *xenbus_strstate(enum xenbus_state state)
+ {
+ static const char *const name[] = {
+@@ -58,6 +65,20 @@ const char *xenbus_strstate(enum xenbus_
+ }
+ EXPORT_SYMBOL_GPL(xenbus_strstate);
+
++/**
++ * xenbus_watch_path - register a watch
++ * @dev: xenbus device
++ * @path: path to watch
++ * @watch: watch to register
++ * @callback: callback to register
++ *
++ * Register a @watch on the given path, using the given xenbus_watch structure
++ * for storage, and the given @callback function as the callback. Return 0 on
++ * success, or -errno on error. On success, the given @path will be saved as
++ * @watch->node, and remains the caller's to free. On error, @watch->node will
++ * be NULL, the device will switch to %XenbusStateClosing, and the error will
++ * be saved in the store.
++ */
+ int xenbus_watch_path(struct xenbus_device *dev, const char *path,
+ struct xenbus_watch *watch,
+ void (*callback)(struct xenbus_watch *,
+@@ -81,6 +102,7 @@ int xenbus_watch_path(struct xenbus_devi
+ EXPORT_SYMBOL_GPL(xenbus_watch_path);
+
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ int xenbus_watch_path2(struct xenbus_device *dev, const char *path,
+ const char *path2, struct xenbus_watch *watch,
+ void (*callback)(struct xenbus_watch *,
+@@ -99,8 +121,60 @@ int xenbus_watch_path2(struct xenbus_dev
+ return err;
+ }
+ EXPORT_SYMBOL_GPL(xenbus_watch_path2);
++#else
++/**
++ * xenbus_watch_pathfmt - register a watch on a sprintf-formatted path
++ * @dev: xenbus device
++ * @watch: watch to register
++ * @callback: callback to register
++ * @pathfmt: format of path to watch
++ *
++ * Register a watch on the given @path, using the given xenbus_watch
++ * structure for storage, and the given @callback function as the callback.
++ * Return 0 on success, or -errno on error. On success, the watched path
++ * (@path/@path2) will be saved as @watch->node, and becomes the caller's to
++ * kfree(). On error, watch->node will be NULL, so the caller has nothing to
++ * free, the device will switch to %XenbusStateClosing, and the error will be
++ * saved in the store.
++ */
++int xenbus_watch_pathfmt(struct xenbus_device *dev,
++ struct xenbus_watch *watch,
++ void (*callback)(struct xenbus_watch *,
++ const char **, unsigned int),
++ const char *pathfmt, ...)
++{
++ int err;
++ va_list ap;
++ char *path;
+
++ va_start(ap, pathfmt);
++ path = kvasprintf(GFP_KERNEL, pathfmt, ap);
++ va_end(ap);
+
++ if (!path) {
++ xenbus_dev_fatal(dev, -ENOMEM, "allocating path for watch");
++ return -ENOMEM;
++ }
++ err = xenbus_watch_path(dev, path, watch, callback);
++
++ if (err)
++ kfree(path);
++ return err;
++}
++EXPORT_SYMBOL_GPL(xenbus_watch_pathfmt);
++#endif
++
++
++/**
++ * xenbus_switch_state
++ * @dev: xenbus device
++ * @xbt: transaction handle
++ * @state: new state
++ *
++ * Advertise in the store a change of the given driver to the given new_state.
++ * Return 0 on success, or -errno on error. On error, the device will switch
++ * to XenbusStateClosing, and the error will be saved in the store.
++ */
+ int xenbus_switch_state(struct xenbus_device *dev, enum xenbus_state state)
+ {
+ /* We check whether the state is currently set to the given value, and
+@@ -159,8 +233,8 @@ static char *error_path(struct xenbus_de
+ }
+
+
+-void _dev_error(struct xenbus_device *dev, int err, const char *fmt,
+- va_list ap)
++static void _dev_error(struct xenbus_device *dev, int err,
++ const char *fmt, va_list ap)
+ {
+ int ret;
+ unsigned int len;
+@@ -181,14 +255,16 @@ void _dev_error(struct xenbus_device *de
+ path_buffer = error_path(dev);
+
+ if (path_buffer == NULL) {
+- printk("xenbus: failed to write error node for %s (%s)\n",
+- dev->nodename, printf_buffer);
++ dev_err(&dev->dev,
++ "xenbus: failed to write error node for %s (%s)\n",
++ dev->nodename, printf_buffer);
+ goto fail;
+ }
+
+ if (xenbus_write(XBT_NIL, path_buffer, "error", printf_buffer) != 0) {
+- printk("xenbus: failed to write error node for %s (%s)\n",
+- dev->nodename, printf_buffer);
++ dev_err(&dev->dev,
++ "xenbus: failed to write error node for %s (%s)\n",
++ dev->nodename, printf_buffer);
+ goto fail;
+ }
+
+@@ -200,6 +276,15 @@ fail:
+ }
+
+
++/**
++ * xenbus_dev_error
++ * @dev: xenbus device
++ * @err: error to report
++ * @fmt: error message format
++ *
++ * Report the given negative errno into the store, along with the given
++ * formatted message.
++ */
+ void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt,
+ ...)
+ {
+@@ -212,6 +297,16 @@ void xenbus_dev_error(struct xenbus_devi
+ EXPORT_SYMBOL_GPL(xenbus_dev_error);
+
+
++/**
++ * xenbus_dev_fatal
++ * @dev: xenbus device
++ * @err: error to report
++ * @fmt: error message format
++ *
++ * Equivalent to xenbus_dev_error(dev, err, fmt, args), followed by
++ * xenbus_switch_state(dev, NULL, XenbusStateClosing) to schedule an orderly
++ * closedown of this driver and its peer.
++ */
+ void xenbus_dev_fatal(struct xenbus_device *dev, int err, const char *fmt,
+ ...)
+ {
+@@ -226,6 +321,15 @@ void xenbus_dev_fatal(struct xenbus_devi
+ EXPORT_SYMBOL_GPL(xenbus_dev_fatal);
+
+
++/**
++ * xenbus_grant_ring
++ * @dev: xenbus device
++ * @ring_mfn: mfn of ring to grant
++ *
++ * Grant access to the given @ring_mfn to the peer of the given device. Return
++ * 0 on success, or -errno on error. On error, the device will switch to
++ * XenbusStateClosing, and the error will be saved in the store.
++ */
+ int xenbus_grant_ring(struct xenbus_device *dev, unsigned long ring_mfn)
+ {
+ int err = gnttab_grant_foreign_access(dev->otherend_id, ring_mfn, 0);
+@@ -236,6 +340,12 @@ int xenbus_grant_ring(struct xenbus_devi
+ EXPORT_SYMBOL_GPL(xenbus_grant_ring);
+
+
++/**
++ * Allocate an event channel for the given xenbus_device, assigning the newly
++ * created local port to *port. Return 0 on success, or -errno on error. On
++ * error, the device will switch to XenbusStateClosing, and the error will be
++ * saved in the store.
++ */
+ int xenbus_alloc_evtchn(struct xenbus_device *dev, int *port)
+ {
+ struct evtchn_alloc_unbound alloc_unbound;
+@@ -256,6 +366,38 @@ int xenbus_alloc_evtchn(struct xenbus_de
+ EXPORT_SYMBOL_GPL(xenbus_alloc_evtchn);
+
+
++#if 0 /* !defined(CONFIG_XEN) && !defined(MODULE) */
++/**
++ * Bind to an existing interdomain event channel in another domain. Returns 0
++ * on success and stores the local port in *port. On error, returns -errno,
++ * switches the device to XenbusStateClosing, and saves the error in XenStore.
++ */
++int xenbus_bind_evtchn(struct xenbus_device *dev, int remote_port, int *port)
++{
++ struct evtchn_bind_interdomain bind_interdomain;
++ int err;
++
++ bind_interdomain.remote_dom = dev->otherend_id;
++ bind_interdomain.remote_port = remote_port;
++
++ err = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain,
++ &bind_interdomain);
++ if (err)
++ xenbus_dev_fatal(dev, err,
++ "binding to event channel %d from domain %d",
++ remote_port, dev->otherend_id);
++ else
++ *port = bind_interdomain.local_port;
++
++ return err;
++}
++EXPORT_SYMBOL_GPL(xenbus_bind_evtchn);
++#endif
++
++
++/**
++ * Free an existing event channel. Returns 0 on success or -errno on error.
++ */
+ int xenbus_free_evtchn(struct xenbus_device *dev, int port)
+ {
+ struct evtchn_close close;
+@@ -272,6 +414,191 @@ int xenbus_free_evtchn(struct xenbus_dev
+ EXPORT_SYMBOL_GPL(xenbus_free_evtchn);
+
+
++#if 0 /* !defined(CONFIG_XEN) && !defined(MODULE) */
++/**
++ * xenbus_map_ring_valloc
++ * @dev: xenbus device
++ * @gnt_ref: grant reference
++ * @vaddr: pointer to address to be filled out by mapping
++ *
++ * Based on Rusty Russell's skeleton driver's map_page.
++ * Map a page of memory into this domain from another domain's grant table.
++ * xenbus_map_ring_valloc allocates a page of virtual address space, maps the
++ * page to that address, and sets *vaddr to that address.
++ * Returns 0 on success, and GNTST_* (see xen/include/interface/grant_table.h)
++ * or -ENOMEM on error. If an error is returned, device will switch to
++ * XenbusStateClosing and the error message will be saved in XenStore.
++ */
++int xenbus_map_ring_valloc(struct xenbus_device *dev, int gnt_ref, void **vaddr)
++{
++ struct gnttab_map_grant_ref op = {
++ .flags = GNTMAP_host_map,
++ .ref = gnt_ref,
++ .dom = dev->otherend_id,
++ };
++ struct vm_struct *area;
++
++ *vaddr = NULL;
++
++ area = alloc_vm_area(PAGE_SIZE);
++ if (!area)
++ return -ENOMEM;
++
++ op.host_addr = (unsigned long)area->addr;
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status != GNTST_okay) {
++ free_vm_area(area);
++ xenbus_dev_fatal(dev, op.status,
++ "mapping in shared page %d from domain %d",
++ gnt_ref, dev->otherend_id);
++ return op.status;
++ }
++
++ /* Stuff the handle in an unused field */
++ area->phys_addr = (unsigned long)op.handle;
++
++ *vaddr = area->addr;
++ return 0;
++}
++EXPORT_SYMBOL_GPL(xenbus_map_ring_valloc);
++
++
++/**
++ * xenbus_map_ring
++ * @dev: xenbus device
++ * @gnt_ref: grant reference
++ * @handle: pointer to grant handle to be filled
++ * @vaddr: address to be mapped to
++ *
++ * Map a page of memory into this domain from another domain's grant table.
++ * xenbus_map_ring does not allocate the virtual address space (you must do
++ * this yourself!). It only maps in the page to the specified address.
++ * Returns 0 on success, and GNTST_* (see xen/include/interface/grant_table.h)
++ * or -ENOMEM on error. If an error is returned, device will switch to
++ * XenbusStateClosing and the error message will be saved in XenStore.
++ */
++int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref,
++ grant_handle_t *handle, void *vaddr)
++{
++ struct gnttab_map_grant_ref op = {
++ .host_addr = (unsigned long)vaddr,
++ .flags = GNTMAP_host_map,
++ .ref = gnt_ref,
++ .dom = dev->otherend_id,
++ };
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status != GNTST_okay) {
++ xenbus_dev_fatal(dev, op.status,
++ "mapping in shared page %d from domain %d",
++ gnt_ref, dev->otherend_id);
++ } else
++ *handle = op.handle;
++
++ return op.status;
++}
++EXPORT_SYMBOL_GPL(xenbus_map_ring);
++
++
++/**
++ * xenbus_unmap_ring_vfree
++ * @dev: xenbus device
++ * @vaddr: addr to unmap
++ *
++ * Based on Rusty Russell's skeleton driver's unmap_page.
++ * Unmap a page of memory in this domain that was imported from another domain.
++ * Use xenbus_unmap_ring_vfree if you mapped in your memory with
++ * xenbus_map_ring_valloc (it will free the virtual address space).
++ * Returns 0 on success and returns GNTST_* on error
++ * (see xen/include/interface/grant_table.h).
++ */
++int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr)
++{
++ struct vm_struct *area;
++ struct gnttab_unmap_grant_ref op = {
++ .host_addr = (unsigned long)vaddr,
++ };
++
++ /* It'd be nice if linux/vmalloc.h provided a find_vm_area(void *addr)
++ * method so that we don't have to muck with vmalloc internals here.
++ * We could force the user to hang on to their struct vm_struct from
++ * xenbus_map_ring_valloc, but these 6 lines considerably simplify
++ * this API.
++ */
++ read_lock(&vmlist_lock);
++ for (area = vmlist; area != NULL; area = area->next) {
++ if (area->addr == vaddr)
++ break;
++ }
++ read_unlock(&vmlist_lock);
++
++ if (!area) {
++ xenbus_dev_error(dev, -ENOENT,
++ "can't find mapped virtual address %p", vaddr);
++ return GNTST_bad_virt_addr;
++ }
++
++ op.handle = (grant_handle_t)area->phys_addr;
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status == GNTST_okay)
++ free_vm_area(area);
++ else
++ xenbus_dev_error(dev, op.status,
++ "unmapping page at handle %d error %d",
++ (int16_t)area->phys_addr, op.status);
++
++ return op.status;
++}
++EXPORT_SYMBOL_GPL(xenbus_unmap_ring_vfree);
++
++
++/**
++ * xenbus_unmap_ring
++ * @dev: xenbus device
++ * @handle: grant handle
++ * @vaddr: addr to unmap
++ *
++ * Unmap a page of memory in this domain that was imported from another domain.
++ * Returns 0 on success and returns GNTST_* on error
++ * (see xen/include/interface/grant_table.h).
++ */
++int xenbus_unmap_ring(struct xenbus_device *dev,
++ grant_handle_t handle, void *vaddr)
++{
++ struct gnttab_unmap_grant_ref op = {
++ .host_addr = (unsigned long)vaddr,
++ .handle = handle,
++ };
++
++ if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
++ BUG();
++
++ if (op.status != GNTST_okay)
++ xenbus_dev_error(dev, op.status,
++ "unmapping page at handle %d error %d",
++ handle, op.status);
++
++ return op.status;
++}
++EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
++#endif
++
++
++/**
++ * xenbus_read_driver_state
++ * @path: path for driver
++ *
++ * Return the state of the driver rooted at the given store path, or
++ * XenbusStateUnknown if no state can be read.
++ */
+ enum xenbus_state xenbus_read_driver_state(const char *path)
+ {
+ enum xenbus_state result;
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_comms.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_comms.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_comms.c 2008-12-01 11:36:47.000000000 +0100
+@@ -34,12 +34,15 @@
+ #include <linux/interrupt.h>
+ #include <linux/sched.h>
+ #include <linux/err.h>
+-#include <linux/ptrace.h>
+-#include <linux/workqueue.h>
+-#include <xen/evtchn.h>
+ #include <xen/xenbus.h>
+-
++#if defined(CONFIG_XEN) || defined(MODULE)
++#include <xen/evtchn.h>
+ #include <asm/hypervisor.h>
++#else
++#include <asm/xen/hypervisor.h>
++#include <xen/events.h>
++#include <xen/page.h>
++#endif
+
+ #include "xenbus_comms.h"
+
+@@ -91,6 +94,13 @@ static const void *get_input_chunk(XENST
+ return buf + MASK_XENSTORE_IDX(cons);
+ }
+
++/**
++ * xb_write - low level write
++ * @data: buffer to send
++ * @len: length of buffer
++ *
++ * Returns 0 on success, error otherwise.
++ */
+ int xb_write(const void *data, unsigned len)
+ {
+ struct xenstore_domain_interface *intf = xen_store_interface;
+@@ -199,7 +209,9 @@ int xb_read(void *data, unsigned len)
+ return 0;
+ }
+
+-/* Set up interrupt handler off store event channel. */
++/**
++ * xb_init_comms - Set up interrupt handler off store event channel.
++ */
+ int xb_init_comms(void)
+ {
+ struct xenstore_domain_interface *intf = xen_store_interface;
+@@ -219,7 +231,11 @@ int xb_init_comms(void)
+ if (xenbus_irq)
+ unbind_from_irqhandler(xenbus_irq, &xb_waitq);
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ err = bind_caller_port_to_irqhandler(
++#else
++ err = bind_evtchn_to_irqhandler(
++#endif
+ xen_store_evtchn, wake_waiting,
+ 0, "xenbus", &xb_waitq);
+ if (err <= 0) {
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_probe.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_probe.c 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_probe.c 2008-12-01 11:36:47.000000000 +0100
+@@ -43,12 +43,11 @@
+ #include <linux/mm.h>
+ #include <linux/notifier.h>
+ #include <linux/mutex.h>
+-#include <linux/module.h>
++#include <linux/io.h>
+
+-#include <asm/io.h>
+ #include <asm/page.h>
+-#include <asm/maddr.h>
+ #include <asm/pgtable.h>
++#if defined(CONFIG_XEN) || defined(MODULE)
+ #include <asm/hypervisor.h>
+ #include <xen/xenbus.h>
+ #include <xen/xen_proc.h>
+@@ -57,6 +56,12 @@
+ #ifdef MODULE
+ #include <xen/hvm.h>
+ #endif
++#else
++#include <asm/xen/hypervisor.h>
++#include <xen/xenbus.h>
++#include <xen/events.h>
++#include <xen/page.h>
++#endif
+
+ #include "xenbus_comms.h"
+ #include "xenbus_probe.h"
+@@ -168,7 +173,7 @@ static int read_backend_details(struct x
+ return read_otherend_details(xendev, "backend-id", "backend");
+ }
+
+-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) && (defined(CONFIG_XEN) || defined(MODULE))
+ static int xenbus_uevent_frontend(struct device *dev, char **envp,
+ int num_envp, char *buffer, int buffer_size)
+ {
+@@ -207,12 +212,16 @@ static struct xen_bus_type xenbus_fronte
+ .probe = xenbus_dev_probe,
+ .remove = xenbus_dev_remove,
+ .shutdown = xenbus_dev_shutdown,
++#if defined(CONFIG_XEN) || defined(MODULE)
+ .uevent = xenbus_uevent_frontend,
+ #endif
++#endif
+ },
++#if defined(CONFIG_XEN) || defined(MODULE)
+ .dev = {
+ .bus_id = "xen",
+ },
++#endif
+ };
+
+ static void otherend_changed(struct xenbus_watch *watch,
+@@ -228,14 +237,15 @@ static void otherend_changed(struct xenb
+ if (!dev->otherend ||
+ strncmp(dev->otherend, vec[XS_WATCH_PATH],
+ strlen(dev->otherend))) {
+- DPRINTK("Ignoring watch at %s", vec[XS_WATCH_PATH]);
++ dev_dbg(&dev->dev, "Ignoring watch at %s", vec[XS_WATCH_PATH]);
+ return;
+ }
+
+ state = xenbus_read_driver_state(dev->otherend);
+
+- DPRINTK("state is %d (%s), %s, %s", state, xenbus_strstate(state),
+- dev->otherend_watch.node, vec[XS_WATCH_PATH]);
++ dev_dbg(&dev->dev, "state is %d (%s), %s, %s",
++ state, xenbus_strstate(state), dev->otherend_watch.node,
++ vec[XS_WATCH_PATH]);
+
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+ /*
+@@ -271,8 +281,13 @@ static int talk_to_otherend(struct xenbu
+
+ static int watch_otherend(struct xenbus_device *dev)
+ {
++#if defined(CONFIG_XEN) || defined(MODULE)
+ return xenbus_watch_path2(dev, dev->otherend, "state",
+ &dev->otherend_watch, otherend_changed);
++#else
++ return xenbus_watch_pathfmt(dev, &dev->otherend_watch, otherend_changed,
++ "%s/%s", dev->otherend, "state");
++#endif
+ }
+
+
+@@ -298,9 +313,9 @@ int xenbus_dev_probe(struct device *_dev
+
+ err = talk_to_otherend(dev);
+ if (err) {
+- printk(KERN_WARNING
+- "xenbus_probe: talk_to_otherend on %s failed.\n",
+- dev->nodename);
++ dev_warn(&dev->dev,
++ "xenbus_probe: talk_to_otherend on %s failed.\n",
++ dev->nodename);
+ return err;
+ }
+
+@@ -310,9 +325,9 @@ int xenbus_dev_probe(struct device *_dev
+
+ err = watch_otherend(dev);
+ if (err) {
+- printk(KERN_WARNING
+- "xenbus_probe: watch_otherend on %s failed.\n",
+- dev->nodename);
++ dev_warn(&dev->dev,
++ "xenbus_probe: watch_otherend on %s failed.\n",
++ dev->nodename);
+ return err;
+ }
+
+@@ -352,14 +367,15 @@ static void xenbus_dev_shutdown(struct d
+
+ get_device(&dev->dev);
+ if (dev->state != XenbusStateConnected) {
+- printk("%s: %s: %s != Connected, skipping\n", __FUNCTION__,
+- dev->nodename, xenbus_strstate(dev->state));
++ dev_info(&dev->dev, "%s: %s: %s != Connected, skipping\n", __FUNCTION__,
++ dev->nodename, xenbus_strstate(dev->state));
+ goto out;
+ }
+ xenbus_switch_state(dev, XenbusStateClosing);
+ timeout = wait_for_completion_timeout(&dev->down, timeout);
+ if (!timeout)
+- printk("%s: %s timeout closing device\n", __FUNCTION__, dev->nodename);
++ dev_info(&dev->dev, "%s: %s timeout closing device\n",
++ __FUNCTION__, dev->nodename);
+ out:
+ put_device(&dev->dev);
+ }
+@@ -547,7 +563,9 @@ int xenbus_probe_node(struct xen_bus_typ
+ xendev->devicetype = tmpstring;
+ init_completion(&xendev->down);
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ xendev->dev.parent = &bus->dev;
++#endif
+ xendev->dev.bus = &bus->bus;
+ xendev->dev.release = xenbus_dev_release;
+
+@@ -562,15 +580,16 @@ int xenbus_probe_node(struct xen_bus_typ
+
+ err = device_create_file(&xendev->dev, &dev_attr_nodename);
+ if (err)
+- goto unregister;
++ goto fail_unregister;
++
+ err = device_create_file(&xendev->dev, &dev_attr_devtype);
+ if (err)
+- goto unregister;
++ goto fail_remove_file;
+
+ return 0;
+-unregister:
++fail_remove_file:
+ device_remove_file(&xendev->dev, &dev_attr_nodename);
+- device_remove_file(&xendev->dev, &dev_attr_devtype);
++fail_unregister:
+ device_unregister(&xendev->dev);
+ fail:
+ kfree(xendev);
+@@ -583,7 +602,8 @@ static int xenbus_probe_frontend(const c
+ char *nodename;
+ int err;
+
+- nodename = kasprintf(GFP_KERNEL, "%s/%s/%s", xenbus_frontend.root, type, name);
++ nodename = kasprintf(GFP_KERNEL, "%s/%s/%s",
++ xenbus_frontend.root, type, name);
+ if (!nodename)
+ return -ENOMEM;
+
+@@ -659,7 +679,7 @@ static int strsep_len(const char *str, c
+ return (len == 0) ? i : -ERANGE;
+ }
+
+-void dev_changed(const char *node, struct xen_bus_type *bus)
++void xenbus_dev_changed(const char *node, struct xen_bus_type *bus)
+ {
+ int exists, rootlen;
+ struct xenbus_device *dev;
+@@ -667,7 +687,7 @@ void dev_changed(const char *node, struc
+ const char *p, *root;
+
+ if (bus->error || char_count(node, '/') < 2)
+- return;
++ return;
+
+ exists = xenbus_exists(XBT_NIL, node, "");
+ if (!exists) {
+@@ -701,7 +721,7 @@ static void frontend_changed(struct xenb
+ {
+ DPRINTK("");
+
+- dev_changed(vec[XS_WATCH_PATH], &xenbus_frontend);
++ xenbus_dev_changed(vec[XS_WATCH_PATH], &xenbus_frontend);
+ }
+
+ /* We watch for devices appearing and vanishing. */
+@@ -904,10 +924,16 @@ static int xsd_port_read(char *page, cha
+ }
+ #endif
+
+-static int xenbus_probe_init(void)
++#ifndef MODULE
++static int __init xenbus_probe_init(void)
++#else
++static int __devinit xenbus_probe_init(void)
++#endif
+ {
+ int err = 0;
++#if defined(CONFIG_XEN) || defined(MODULE)
+ unsigned long page = 0;
++#endif
+
+ DPRINTK("");
+
+@@ -926,6 +952,7 @@ static int xenbus_probe_init(void)
+ * Domain0 doesn't have a store_evtchn or store_mfn yet.
+ */
+ if (is_initial_xendomain()) {
++#if defined(CONFIG_XEN) || defined(MODULE)
+ struct evtchn_alloc_unbound alloc_unbound;
+
+ /* Allocate page. */
+@@ -963,10 +990,13 @@ static int xenbus_probe_init(void)
+ if (xsd_port_intf)
+ xsd_port_intf->read_proc = xsd_port_read;
+ #endif
++#else
++ /* dom0 not yet supported */
++#endif
+ xen_store_interface = mfn_to_virt(xen_store_mfn);
+ } else {
+ xenstored_ready = 1;
+-#ifdef CONFIG_XEN
++#ifndef MODULE
+ xen_store_evtchn = xen_start_info->store_evtchn;
+ xen_store_mfn = xen_start_info->store_mfn;
+ xen_store_interface = mfn_to_virt(xen_store_mfn);
+@@ -979,7 +1009,9 @@ static int xenbus_probe_init(void)
+ }
+
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ xenbus_dev_init();
++#endif
+
+ /* Initialize the interface to xenstore. */
+ err = xs_init();
+@@ -989,6 +1021,7 @@ static int xenbus_probe_init(void)
+ goto err;
+ }
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ /* Register ourselves with the kernel device subsystem */
+ if (!xenbus_frontend.error) {
+ xenbus_frontend.error = device_register(&xenbus_frontend.dev);
+@@ -999,6 +1032,7 @@ static int xenbus_probe_init(void)
+ xenbus_frontend.error);
+ }
+ }
++#endif
+ xenbus_backend_device_register();
+
+ if (!is_initial_xendomain())
+@@ -1007,8 +1041,10 @@ static int xenbus_probe_init(void)
+ return 0;
+
+ err:
++#if defined(CONFIG_XEN) || defined(MODULE)
+ if (page)
+ free_page(page);
++#endif
+
+ /*
+ * Do not unregister the xenbus front/backend buses here. The buses
+@@ -1019,11 +1055,15 @@ static int xenbus_probe_init(void)
+ return err;
+ }
+
+-#ifdef CONFIG_XEN
++#ifndef MODULE
+ postcore_initcall(xenbus_probe_init);
++#ifdef CONFIG_XEN
+ MODULE_LICENSE("Dual BSD/GPL");
+ #else
+-int xenbus_init(void)
++MODULE_LICENSE("GPL");
++#endif
++#else
++int __devinit xenbus_init(void)
+ {
+ return xenbus_probe_init();
+ }
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_probe.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_probe.h 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_probe.h 2008-12-01 11:36:47.000000000 +0100
+@@ -56,7 +56,9 @@ struct xen_bus_type
+ int (*get_bus_id)(char bus_id[BUS_ID_SIZE], const char *nodename);
+ int (*probe)(const char *type, const char *dir);
+ struct bus_type bus;
++#if defined(CONFIG_XEN) || defined(MODULE)
+ struct device dev;
++#endif
+ };
+
+ extern int xenbus_match(struct device *_dev, struct device_driver *_drv);
+@@ -71,7 +73,7 @@ extern int xenbus_probe_node(struct xen_
+ const char *nodename);
+ extern int xenbus_probe_devices(struct xen_bus_type *bus);
+
+-extern void dev_changed(const char *node, struct xen_bus_type *bus);
++extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
+
+ #endif
+
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_probe_backend.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_probe_backend.c 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_probe_backend.c 2008-12-01 11:36:47.000000000 +0100
+@@ -236,7 +236,7 @@ static void backend_changed(struct xenbu
+ {
+ DPRINTK("");
+
+- dev_changed(vec[XS_WATCH_PATH], &xenbus_backend);
++ xenbus_dev_changed(vec[XS_WATCH_PATH], &xenbus_backend);
+ }
+
+ static struct xenbus_watch be_watch = {
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_xs.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_xs.c 2008-12-01 11:22:58.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_xs.c 2008-12-01 11:36:47.000000000 +0100
+@@ -221,7 +221,7 @@ static void *xs_talkv(struct xenbus_tran
+ }
+
+ for (i = 0; i < num_vecs; i++) {
+- err = xb_write(iovec[i].iov_base, iovec[i].iov_len);;
++ err = xb_write(iovec[i].iov_base, iovec[i].iov_len);
+ if (err) {
+ mutex_unlock(&xs_state.request_mutex);
+ return ERR_PTR(err);
+@@ -630,7 +630,9 @@ void unregister_xenbus_watch(struct xenb
+ char token[sizeof(watch) * 2 + 1];
+ int err;
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ BUG_ON(watch->flags & XBWF_new_thread);
++#endif
+
+ sprintf(token, "%lX", (long)watch);
+
+@@ -649,6 +651,11 @@ void unregister_xenbus_watch(struct xenb
+
+ up_read(&xs_state.watch_mutex);
+
++ /* Make sure there are no callbacks running currently (unless
++ its us) */
++ if (current->pid != xenwatch_pid)
++ mutex_lock(&xenwatch_mutex);
++
+ /* Cancel pending watch events. */
+ spin_lock(&watch_events_lock);
+ list_for_each_entry_safe(msg, tmp, &watch_events, list) {
+@@ -660,11 +667,8 @@ void unregister_xenbus_watch(struct xenb
+ }
+ spin_unlock(&watch_events_lock);
+
+- /* Flush any currently-executing callback, unless we are it. :-) */
+- if (current->pid != xenwatch_pid) {
+- mutex_lock(&xenwatch_mutex);
++ if (current->pid != xenwatch_pid)
+ mutex_unlock(&xenwatch_mutex);
+- }
+ }
+ EXPORT_SYMBOL_GPL(unregister_xenbus_watch);
+
+@@ -702,6 +706,7 @@ void xs_suspend_cancel(void)
+ up_write(&xs_state.transaction_mutex);
+ }
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ static int xenwatch_handle_callback(void *data)
+ {
+ struct xs_stored_msg *msg = data;
+@@ -719,6 +724,7 @@ static int xenwatch_handle_callback(void
+
+ return 0;
+ }
++#endif
+
+ static int xenwatch_thread(void *unused)
+ {
+@@ -748,6 +754,7 @@ static int xenwatch_thread(void *unused)
+
+ msg = list_entry(ent, struct xs_stored_msg, list);
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ /*
+ * Unlock the mutex before running an XBWF_new_thread
+ * handler. kthread_run can block which can deadlock
+@@ -764,6 +771,15 @@ static int xenwatch_thread(void *unused)
+ xenwatch_handle_callback(msg);
+ mutex_unlock(&xenwatch_mutex);
+ }
++#else
++ msg->u.watch.handle->callback(
++ msg->u.watch.handle,
++ (const char **)msg->u.watch.vec,
++ msg->u.watch.vec_size);
++ mutex_unlock(&xenwatch_mutex);
++ kfree(msg->u.watch.vec);
++ kfree(msg);
++#endif
+ }
+
+ return 0;
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -53,6 +53,8 @@ extern unsigned long __FIXADDR_TOP;
+ enum fixed_addresses {
+ FIX_HOLE,
+ FIX_VDSO,
++ FIX_DBGP_BASE,
++ FIX_EARLYCON_MEM_BASE,
+ #ifdef CONFIG_X86_LOCAL_APIC
+ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/highmem.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/highmem.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/highmem.h 2008-12-01 11:36:47.000000000 +0100
+@@ -76,8 +76,7 @@ struct page *kmap_atomic_to_page(void *p
+
+ #define kmap_atomic_pte(page, type) \
+ kmap_atomic_prot(page, type, \
+- test_bit(PG_pinned, &(page)->flags) \
+- ? PAGE_KERNEL_RO : kmap_prot)
++ PagePinned(page) ? PAGE_KERNEL_RO : kmap_prot)
+
+ #define flush_cache_kmaps() do { } while (0)
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -125,6 +125,9 @@ extern void __iomem * __ioremap(unsigned
+ * writew/writel functions and the other mmio helpers. The returned
+ * address is not guaranteed to be usable directly as a virtual
+ * address.
++ *
++ * If the area you are trying to map is a PCI BAR you should have a
++ * look at pci_iomap().
+ */
+
+ static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
+@@ -142,6 +145,7 @@ extern void iounmap(volatile void __iome
+ */
+ extern void *bt_ioremap(unsigned long offset, unsigned long size);
+ extern void bt_iounmap(void *addr, unsigned long size);
++extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
+
+ /* Use early IO mappings for DMI because it's initialized early */
+ #define dmi_ioremap bt_ioremap
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/maddr_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/maddr_32.h 2008-04-02 12:34:02.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/maddr_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -155,6 +155,7 @@ static inline paddr_t pte_machine_to_phy
+
+ #ifdef CONFIG_X86_PAE
+ #define __pte_ma(x) ((pte_t) { (x), (maddr_t)(x) >> 32 } )
++extern unsigned long long __supported_pte_mask;
+ static inline pte_t pfn_pte_ma(unsigned long page_nr, pgprot_t pgprot)
+ {
+ pte_t pte;
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/mmu_context_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -16,7 +16,7 @@ void mm_pin_all(void);
+ static inline void xen_activate_mm(struct mm_struct *prev,
+ struct mm_struct *next)
+ {
+- if (!test_bit(PG_pinned, &virt_to_page(next->pgd)->flags))
++ if (!PagePinned(virt_to_page(next->pgd)))
+ mm_pin(next);
+ }
+
+@@ -51,6 +51,8 @@ static inline void __prepare_arch_switch
+ : : "r" (0) );
+ }
+
++void leave_mm(unsigned long cpu);
++
+ static inline void switch_mm(struct mm_struct *prev,
+ struct mm_struct *next,
+ struct task_struct *tsk)
+@@ -60,7 +62,7 @@ static inline void switch_mm(struct mm_s
+
+ if (likely(prev != next)) {
+ BUG_ON(!xen_feature(XENFEAT_writable_page_tables) &&
+- !test_bit(PG_pinned, &virt_to_page(next->pgd)->flags));
++ !PagePinned(virt_to_page(next->pgd)));
+
+ /* stop flush ipis for the previous mm */
+ cpu_clear(cpu, prev->cpu_vm_mask);
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pci_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pci_32.h 2007-09-14 11:14:51.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pci_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -3,6 +3,14 @@
+
+
+ #ifdef __KERNEL__
++
++struct pci_sysdata {
++ int node; /* NUMA node */
++};
++
++/* scan a bus after allocating a pci_sysdata for it */
++extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
++
+ #include <linux/mm.h> /* for struct page */
+
+ /* Can be used to override the logic in pci_scan_bus for skipping
+@@ -81,48 +89,11 @@ struct pci_dev;
+
+ #endif
+
+-/* This is always fine. */
+-#define pci_dac_dma_supported(pci_dev, mask) (1)
+-
+-static inline dma64_addr_t
+-pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
+-{
+- return ((dma64_addr_t) page_to_phys(page) +
+- (dma64_addr_t) offset);
+-}
+-
+-static inline struct page *
+-pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
+-{
+- return pfn_to_page(dma_addr >> PAGE_SHIFT);
+-}
+-
+-static inline unsigned long
+-pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
+-{
+- return (dma_addr & ~PAGE_MASK);
+-}
+-
+-static inline void
+-pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+-{
+-}
+-
+-static inline void
+-pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+-{
+- flush_write_buffers();
+-}
+-
+ #define HAVE_PCI_MMAP
+ extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state, int write_combine);
+
+
+-static inline void pcibios_add_platform_entries(struct pci_dev *dev)
+-{
+-}
+-
+ #ifdef CONFIG_PCI
+ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+ enum pci_dma_burst_strategy *strat,
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgalloc_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -5,7 +5,7 @@
+ #include <linux/mm.h> /* for struct page */
+ #include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
+
+-#define paravirt_alloc_pt(pfn) do { } while (0)
++#define paravirt_alloc_pt(mm, pfn) do { } while (0)
+ #define paravirt_alloc_pd(pfn) do { } while (0)
+ #define paravirt_alloc_pd(pfn) do { } while (0)
+ #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
+@@ -14,15 +14,15 @@
+
+ #define pmd_populate_kernel(mm, pmd, pte) \
+ do { \
+- paravirt_alloc_pt(__pa(pte) >> PAGE_SHIFT); \
++ paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \
+ set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \
+ } while (0)
+
+ #define pmd_populate(mm, pmd, pte) \
+ do { \
+ unsigned long pfn = page_to_pfn(pte); \
+- paravirt_alloc_pt(pfn); \
+- if (test_bit(PG_pinned, &virt_to_page((mm)->pgd)->flags)) { \
++ paravirt_alloc_pt(mm, pfn); \
++ if (PagePinned(virt_to_page((mm)->pgd))) { \
+ if (!PageHighMem(pte)) \
+ BUG_ON(HYPERVISOR_update_va_mapping( \
+ (unsigned long)__va(pfn << PAGE_SHIFT), \
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -26,9 +26,6 @@
+ #include <linux/spinlock.h>
+ #include <linux/sched.h>
+
+-/* Is this pagetable pinned? */
+-#define PG_pinned PG_arch_1
+-
+ struct vm_area_struct;
+
+ /*
+@@ -82,7 +79,7 @@ void paging_init(void);
+ * area for the same reason. ;)
+ */
+ #define VMALLOC_OFFSET (8*1024*1024)
+-#define VMALLOC_START (((unsigned long) high_memory + vmalloc_earlyreserve + \
++#define VMALLOC_START (((unsigned long) high_memory + \
+ 2*VMALLOC_OFFSET-1) & ~(VMALLOC_OFFSET-1))
+ #ifdef CONFIG_HIGHMEM
+ # define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
+@@ -231,8 +228,6 @@ extern unsigned long pg0[];
+ * The following only work if pte_present() is true.
+ * Undefined behaviour if not..
+ */
+-static inline int pte_user(pte_t pte) { return (pte).pte_low & _PAGE_USER; }
+-static inline int pte_read(pte_t pte) { return (pte).pte_low & _PAGE_USER; }
+ static inline int pte_dirty(pte_t pte) { return (pte).pte_low & _PAGE_DIRTY; }
+ static inline int pte_young(pte_t pte) { return (pte).pte_low & _PAGE_ACCESSED; }
+ static inline int pte_write(pte_t pte) { return (pte).pte_low & _PAGE_RW; }
+@@ -243,13 +238,9 @@ static inline int pte_huge(pte_t pte) {
+ */
+ static inline int pte_file(pte_t pte) { return (pte).pte_low & _PAGE_FILE; }
+
+-static inline pte_t pte_rdprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_USER; return pte; }
+-static inline pte_t pte_exprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_USER; return pte; }
+ static inline pte_t pte_mkclean(pte_t pte) { (pte).pte_low &= ~_PAGE_DIRTY; return pte; }
+ static inline pte_t pte_mkold(pte_t pte) { (pte).pte_low &= ~_PAGE_ACCESSED; return pte; }
+ static inline pte_t pte_wrprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_RW; return pte; }
+-static inline pte_t pte_mkread(pte_t pte) { (pte).pte_low |= _PAGE_USER; return pte; }
+-static inline pte_t pte_mkexec(pte_t pte) { (pte).pte_low |= _PAGE_USER; return pte; }
+ static inline pte_t pte_mkdirty(pte_t pte) { (pte).pte_low |= _PAGE_DIRTY; return pte; }
+ static inline pte_t pte_mkyoung(pte_t pte) { (pte).pte_low |= _PAGE_ACCESSED; return pte; }
+ static inline pte_t pte_mkwrite(pte_t pte) { (pte).pte_low |= _PAGE_RW; return pte; }
+@@ -295,22 +286,20 @@ static inline pte_t xen_local_ptep_get_a
+ #define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
+ ({ \
+ int __changed = !pte_same(*(ptep), entry); \
+- if (__changed && (dirty)) \
+- ptep_establish(vma, address, ptep, entry); \
++ if (__changed && (dirty)) { \
++ if ( likely((vma)->vm_mm == current->mm) ) { \
++ BUG_ON(HYPERVISOR_update_va_mapping(address, \
++ entry, \
++ (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
++ UVMF_INVLPG|UVMF_MULTI)); \
++ } else { \
++ xen_l1_entry_update(ptep, entry); \
++ flush_tlb_page(vma, address); \
++ } \
++ } \
+ __changed; \
+ })
+
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
+-#define ptep_test_and_clear_dirty(vma, addr, ptep) ({ \
+- int __ret = 0; \
+- if (pte_dirty(*(ptep))) \
+- __ret = test_and_clear_bit(_PAGE_BIT_DIRTY, \
+- &(ptep)->pte_low); \
+- if (__ret) \
+- pte_update((vma)->vm_mm, addr, ptep); \
+- __ret; \
+-})
+-
+ #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+ #define ptep_test_and_clear_young(vma, addr, ptep) ({ \
+ int __ret = 0; \
+@@ -322,44 +311,13 @@ static inline pte_t xen_local_ptep_get_a
+ __ret; \
+ })
+
+-/*
+- * Rules for using ptep_establish: the pte MUST be a user pte, and
+- * must be a present->present transition.
+- */
+-#define __HAVE_ARCH_PTEP_ESTABLISH
+-#define ptep_establish(vma, address, ptep, pteval) \
+-do { \
+- if ( likely((vma)->vm_mm == current->mm) ) { \
+- BUG_ON(HYPERVISOR_update_va_mapping(address, \
+- pteval, \
+- (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
+- UVMF_INVLPG|UVMF_MULTI)); \
+- } else { \
+- xen_l1_entry_update(ptep, pteval); \
+- flush_tlb_page(vma, address); \
+- } \
+-} while (0)
+-
+-#define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
+-#define ptep_clear_flush_dirty(vma, address, ptep) \
+-({ \
+- pte_t __pte = *(ptep); \
+- int __dirty = pte_dirty(__pte); \
+- __pte = pte_mkclean(__pte); \
+- if (test_bit(PG_pinned, &virt_to_page((vma)->vm_mm->pgd)->flags)) \
+- (void)ptep_set_access_flags(vma, address, ptep, __pte, __dirty); \
+- else if (__dirty) \
+- (ptep)->pte_low = __pte.pte_low; \
+- __dirty; \
+-})
+-
+ #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
+ #define ptep_clear_flush_young(vma, address, ptep) \
+ ({ \
+ pte_t __pte = *(ptep); \
+ int __young = pte_young(__pte); \
+ __pte = pte_mkold(__pte); \
+- if (test_bit(PG_pinned, &virt_to_page((vma)->vm_mm->pgd)->flags)) \
++ if (PagePinned(virt_to_page((vma)->vm_mm->pgd))) \
+ (void)ptep_set_access_flags(vma, address, ptep, __pte, __young); \
+ else if (__young) \
+ (ptep)->pte_low = __pte.pte_low; \
+@@ -383,7 +341,7 @@ static inline pte_t ptep_get_and_clear(s
+ #define ptep_get_and_clear_full(mm, addr, ptep, full) \
+ ((full) ? ({ \
+ pte_t __res = *(ptep); \
+- if (test_bit(PG_pinned, &virt_to_page((mm)->pgd)->flags)) \
++ if (PagePinned(virt_to_page((mm)->pgd))) \
+ xen_l1_entry_update(ptep, __pte(0)); \
+ else \
+ *(ptep) = __pte(0); \
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 11:36:47.000000000 +0100
+@@ -23,26 +23,11 @@
+ #define pud_present(pud) 1
+
+ /*
+- * Is the pte executable?
+- */
+-static inline int pte_x(pte_t pte)
+-{
+- return !(__pte_val(pte) & _PAGE_NX);
+-}
+-
+-/*
+- * All present user-pages with !NX bit are user-executable:
+- */
+-static inline int pte_exec(pte_t pte)
+-{
+- return pte_user(pte) && pte_x(pte);
+-}
+-/*
+ * All present pages with !NX bit are kernel-executable:
+ */
+ static inline int pte_exec_kernel(pte_t pte)
+ {
+- return pte_x(pte);
++ return !(__pte_val(pte) & _PAGE_NX);
+ }
+
+ /* Rules for using set_pte: the pte being assigned *must* be
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -89,7 +89,6 @@ struct cpuinfo_x86 {
+ #define X86_VENDOR_UMC 3
+ #define X86_VENDOR_NEXGEN 4
+ #define X86_VENDOR_CENTAUR 5
+-#define X86_VENDOR_RISE 6
+ #define X86_VENDOR_TRANSMETA 7
+ #define X86_VENDOR_NSC 8
+ #define X86_VENDOR_NUM 9
+@@ -122,6 +121,7 @@ void __init cpu_detect(struct cpuinfo_x8
+ extern void identify_boot_cpu(void);
+ extern void identify_secondary_cpu(struct cpuinfo_x86 *);
+ extern void print_cpu_info(struct cpuinfo_x86 *);
++extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
+ extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
+ extern unsigned short num_cache_leaves;
+
+@@ -171,17 +171,6 @@ static inline void clear_in_cr4 (unsigne
+ write_cr4(cr4);
+ }
+
+-/*
+- * NSC/Cyrix CPU indexed register access macros
+- */
+-
+-#define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); })
+-
+-#define setCx86(reg, data) do { \
+- outb((reg), 0x22); \
+- outb((data), 0x23); \
+-} while (0)
+-
+ /* Stop speculative execution */
+ static inline void sync_core(void)
+ {
+@@ -230,6 +219,10 @@ extern int bootloader_type;
+
+ #define HAVE_ARCH_PICK_MMAP_LAYOUT
+
++extern void hard_disable_TSC(void);
++extern void disable_TSC(void);
++extern void hard_enable_TSC(void);
++
+ /*
+ * Size of io_bitmap.
+ */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/system_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -205,11 +205,6 @@ static inline unsigned long get_limit(un
+ */
+
+
+-/*
+- * Actually only lfence would be needed for mb() because all stores done
+- * by the kernel should be already ordered. But keep a full barrier for now.
+- */
+-
+ #define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
+ #define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
+
+@@ -301,15 +296,6 @@ void enable_hlt(void);
+ extern int es7000_plat;
+ void cpu_idle_wait(void);
+
+-/*
+- * On SMP systems, when the scheduler does migration-cost autodetection,
+- * it needs a way to flush as much of the CPU's caches as possible:
+- */
+-static inline void sched_cacheflush(void)
+-{
+- wbinvd();
+-}
+-
+ extern unsigned long arch_align_stack(unsigned long sp);
+ extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/tlbflush_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -91,7 +91,11 @@ struct tlb_state
+ DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
+ #endif /* SMP */
+
+-#define flush_tlb_kernel_range(start, end) flush_tlb_all()
++static inline void flush_tlb_kernel_range(unsigned long start,
++ unsigned long end)
++{
++ flush_tlb_all();
++}
+
+ static inline void flush_tlb_pgtables(struct mm_struct *mm,
+ unsigned long start, unsigned long end)
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/fixmap_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -23,9 +23,9 @@
+ * compile time, but to set the physical address only
+ * in the boot process.
+ *
+- * these 'compile-time allocated' memory buffers are
+- * fixed-size 4k pages. (or larger if used with an increment
+- * highger than 1) use fixmap_set(idx,phys) to associate
++ * These 'compile-time allocated' memory buffers are
++ * fixed-size 4k pages (or larger if used with an increment
++ * higher than 1). Use set_fixmap(idx,phys) to associate
+ * physical memory with fixmap indices.
+ *
+ * TLB entries of such buffers will not be flushed across
+@@ -36,6 +36,8 @@ enum fixed_addresses {
+ VSYSCALL_LAST_PAGE,
+ VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE + ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1,
+ VSYSCALL_HPET,
++ FIX_DBGP_BASE,
++ FIX_EARLYCON_MEM_BASE,
+ FIX_HPET_BASE,
+ #ifdef CONFIG_X86_LOCAL_APIC
+ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+@@ -105,7 +107,7 @@ static __always_inline unsigned long fix
+ if (idx >= __end_of_fixed_addresses)
+ __this_fixmap_does_not_exist();
+
+- return __fix_to_virt(idx);
++ return __fix_to_virt(idx);
+ }
+
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_64.h 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -162,6 +162,7 @@ extern void bt_iounmap(void *addr, unsig
+ */
+ extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
+ extern void iounmap(volatile void __iomem *addr);
++extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
+
+ /*
+ * ISA I/O bus memory addresses are 1:1 with the physical address.
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/mmu_context_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -76,7 +76,7 @@ static inline void switch_mm(struct mm_s
+
+ if (likely(prev != next)) {
+ BUG_ON(!xen_feature(XENFEAT_writable_page_tables) &&
+- !next->context.pinned);
++ !PagePinned(virt_to_page(next->pgd)));
+
+ /* stop flush ipis for the previous mm */
+ cpu_clear(cpu, prev->cpu_vm_mask);
+@@ -131,7 +131,7 @@ static inline void switch_mm(struct mm_s
+
+ static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
+ {
+- if (!next->context.pinned)
++ if (!PagePinned(virt_to_page(next->pgd)))
+ mm_pin(next);
+ switch_mm(prev, next, NULL);
+ }
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/page_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/page_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/page_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -72,7 +72,8 @@ void copy_page(void *, void *);
+ #define clear_user_page(page, vaddr, pg) clear_page(page)
+ #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
+
+-#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
++#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
++ alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
+ #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+ /*
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pci_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pci_64.h 2007-09-14 11:14:51.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pci_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -5,6 +5,27 @@
+
+ #ifdef __KERNEL__
+
++struct pci_sysdata {
++ int node; /* NUMA node */
++ void* iommu; /* IOMMU private data */
++};
++
++extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
++
++#ifdef CONFIG_CALGARY_IOMMU
++static inline void* pci_iommu(struct pci_bus *bus)
++{
++ struct pci_sysdata *sd = bus->sysdata;
++ return sd->iommu;
++}
++
++static inline void set_pci_iommu(struct pci_bus *bus, void *val)
++{
++ struct pci_sysdata *sd = bus->sysdata;
++ sd->iommu = val;
++}
++#endif /* CONFIG_CALGARY_IOMMU */
++
+ #include <linux/mm.h> /* for struct page */
+
+ /* Can be used to override the logic in pci_scan_bus for skipping
+@@ -56,14 +77,6 @@ extern int iommu_setup(char *opt);
+
+ #if defined(CONFIG_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
+
+-/*
+- * x86-64 always supports DAC, but sometimes it is useful to force
+- * devices through the IOMMU to get automatic sg list merging.
+- * Optional right now.
+- */
+-extern int iommu_sac_force;
+-#define pci_dac_dma_supported(pci_dev, mask) (!iommu_sac_force)
+-
+ #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
+ dma_addr_t ADDR_NAME;
+ #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
+@@ -97,8 +110,6 @@ extern int iommu_sac_force;
+ #else
+ /* No IOMMU */
+
+-#define pci_dac_dma_supported(pci_dev, mask) 1
+-
+ #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
+ #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
+ #define pci_unmap_addr(PTR, ADDR_NAME) (0)
+@@ -110,36 +121,6 @@ extern int iommu_sac_force;
+
+ #include <asm-generic/pci-dma-compat.h>
+
+-static inline dma64_addr_t
+-pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
+-{
+- return ((dma64_addr_t) page_to_phys(page) +
+- (dma64_addr_t) offset);
+-}
+-
+-static inline struct page *
+-pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
+-{
+- return virt_to_page(__va(dma_addr));
+-}
+-
+-static inline unsigned long
+-pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
+-{
+- return (dma_addr & ~PAGE_MASK);
+-}
+-
+-static inline void
+-pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+-{
+-}
+-
+-static inline void
+-pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+-{
+- flush_write_buffers();
+-}
+-
+ #ifdef CONFIG_PCI
+ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+ enum pci_dma_burst_strategy *strat,
+@@ -154,10 +135,6 @@ static inline void pci_dma_burst_advice(
+ extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state, int write_combine);
+
+-static inline void pcibios_add_platform_entries(struct pci_dev *dev)
+-{
+-}
+-
+ #endif /* __KERNEL__ */
+
+ /* generic pci stuff */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgalloc_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -21,7 +21,7 @@ static inline void pmd_populate_kernel(s
+
+ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
+ {
+- if (unlikely((mm)->context.pinned)) {
++ if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+ BUG_ON(HYPERVISOR_update_va_mapping(
+ (unsigned long)__va(page_to_pfn(pte) << PAGE_SHIFT),
+ pfn_pte(page_to_pfn(pte), PAGE_KERNEL_RO), 0));
+@@ -33,7 +33,7 @@ static inline void pmd_populate(struct m
+
+ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+ {
+- if (unlikely((mm)->context.pinned)) {
++ if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+ BUG_ON(HYPERVISOR_update_va_mapping(
+ (unsigned long)pmd,
+ pfn_pte(virt_to_phys(pmd)>>PAGE_SHIFT,
+@@ -50,7 +50,7 @@ static inline void pud_populate(struct m
+ */
+ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
+ {
+- if (unlikely((mm)->context.pinned)) {
++ if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+ BUG_ON(HYPERVISOR_update_va_mapping(
+ (unsigned long)pud,
+ pfn_pte(virt_to_phys(pud)>>PAGE_SHIFT,
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -302,7 +302,7 @@ static inline pte_t ptep_get_and_clear_f
+ {
+ if (full) {
+ pte_t pte = *ptep;
+- if (mm->context.pinned)
++ if (PagePinned(virt_to_page(mm->pgd)))
+ xen_l1_entry_update(ptep, __pte(0));
+ else
+ *ptep = __pte(0);
+@@ -331,21 +331,15 @@ static inline pte_t ptep_get_and_clear_f
+ * Undefined behaviour if not..
+ */
+ #define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT)
+-static inline int pte_user(pte_t pte) { return __pte_val(pte) & _PAGE_USER; }
+-static inline int pte_read(pte_t pte) { return __pte_val(pte) & _PAGE_USER; }
+-static inline int pte_exec(pte_t pte) { return !(__pte_val(pte) & _PAGE_NX); }
+ static inline int pte_dirty(pte_t pte) { return __pte_val(pte) & _PAGE_DIRTY; }
+ static inline int pte_young(pte_t pte) { return __pte_val(pte) & _PAGE_ACCESSED; }
+ static inline int pte_write(pte_t pte) { return __pte_val(pte) & _PAGE_RW; }
+ static inline int pte_file(pte_t pte) { return __pte_val(pte) & _PAGE_FILE; }
+ static inline int pte_huge(pte_t pte) { return __pte_val(pte) & _PAGE_PSE; }
+
+-static inline pte_t pte_rdprotect(pte_t pte) { __pte_val(pte) &= ~_PAGE_USER; return pte; }
+-static inline pte_t pte_exprotect(pte_t pte) { __pte_val(pte) &= ~_PAGE_USER; return pte; }
+ static inline pte_t pte_mkclean(pte_t pte) { __pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
+ static inline pte_t pte_mkold(pte_t pte) { __pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
+ static inline pte_t pte_wrprotect(pte_t pte) { __pte_val(pte) &= ~_PAGE_RW; return pte; }
+-static inline pte_t pte_mkread(pte_t pte) { __pte_val(pte) |= _PAGE_USER; return pte; }
+ static inline pte_t pte_mkexec(pte_t pte) { __pte_val(pte) &= ~_PAGE_NX; return pte; }
+ static inline pte_t pte_mkdirty(pte_t pte) { __pte_val(pte) |= _PAGE_DIRTY; return pte; }
+ static inline pte_t pte_mkyoung(pte_t pte) { __pte_val(pte) |= _PAGE_ACCESSED; return pte; }
+@@ -353,13 +347,6 @@ static inline pte_t pte_mkwrite(pte_t pt
+ static inline pte_t pte_mkhuge(pte_t pte) { __pte_val(pte) |= _PAGE_PSE; return pte; }
+ static inline pte_t pte_clrhuge(pte_t pte) { __pte_val(pte) &= ~_PAGE_PSE; return pte; }
+
+-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
+-{
+- if (!pte_dirty(*ptep))
+- return 0;
+- return test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte);
+-}
+-
+ static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
+ {
+ if (!pte_young(*ptep))
+@@ -498,26 +485,13 @@ static inline pte_t pte_modify(pte_t pte
+ __changed; \
+ })
+
+-#define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
+-#define ptep_clear_flush_dirty(vma, address, ptep) \
+-({ \
+- pte_t __pte = *(ptep); \
+- int __dirty = pte_dirty(__pte); \
+- __pte = pte_mkclean(__pte); \
+- if ((vma)->vm_mm->context.pinned) \
+- (void)ptep_set_access_flags(vma, address, ptep, __pte, __dirty); \
+- else if (__dirty) \
+- set_pte(ptep, __pte); \
+- __dirty; \
+-})
+-
+ #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
+ #define ptep_clear_flush_young(vma, address, ptep) \
+ ({ \
+ pte_t __pte = *(ptep); \
+ int __young = pte_young(__pte); \
+ __pte = pte_mkold(__pte); \
+- if ((vma)->vm_mm->context.pinned) \
++ if (PagePinned(virt_to_page((vma)->vm_mm->pgd))) \
+ (void)ptep_set_access_flags(vma, address, ptep, __pte, __young); \
+ else if (__young) \
+ set_pte(ptep, __pte); \
+@@ -568,6 +542,8 @@ int xen_change_pte_range(struct mm_struc
+ #define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) \
+ xen_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable)
+
++pte_t *lookup_address(unsigned long addr);
++
+ #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
+ direct_remap_pfn_range(vma,vaddr,pfn,size,prot,DOMID_IO)
+
+@@ -585,7 +561,6 @@ int xen_change_pte_range(struct mm_struc
+ (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))
+
+ #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
+ #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+ #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
+ #define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -83,7 +83,6 @@ struct cpuinfo_x86 {
+ #define X86_VENDOR_UMC 3
+ #define X86_VENDOR_NEXGEN 4
+ #define X86_VENDOR_CENTAUR 5
+-#define X86_VENDOR_RISE 6
+ #define X86_VENDOR_TRANSMETA 7
+ #define X86_VENDOR_NUM 8
+ #define X86_VENDOR_UNKNOWN 0xff
+@@ -100,6 +99,7 @@ extern char ignore_irq13;
+
+ extern void identify_cpu(struct cpuinfo_x86 *);
+ extern void print_cpu_info(struct cpuinfo_x86 *);
++extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
+ extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
+ extern unsigned short num_cache_leaves;
+
+@@ -377,12 +377,10 @@ static inline void sync_core(void)
+ asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory");
+ }
+
+-#define cpu_has_fpu 1
+-
+ #define ARCH_HAS_PREFETCH
+ static inline void prefetch(void *x)
+ {
+- asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
++ asm volatile("prefetcht0 (%0)" :: "r" (x));
+ }
+
+ #define ARCH_HAS_PREFETCHW 1
+@@ -400,17 +398,6 @@ static inline void prefetchw(void *x)
+
+ #define cpu_relax() rep_nop()
+
+-/*
+- * NSC/Cyrix CPU indexed register access macros
+- */
+-
+-#define getCx86(reg) ({ outb((reg), 0x22); inb(0x23); })
+-
+-#define setCx86(reg, data) do { \
+- outb((reg), 0x22); \
+- outb((data), 0x23); \
+-} while (0)
+-
+ static inline void serialize_cpu(void)
+ {
+ __asm__ __volatile__ ("cpuid" : : : "ax", "bx", "cx", "dx");
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/system_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -79,12 +79,16 @@ static inline unsigned long read_cr0(voi
+ unsigned long cr0;
+ asm volatile("movq %%cr0,%0" : "=r" (cr0));
+ return cr0;
+-}
++}
+
+ static inline void write_cr0(unsigned long val)
+ {
+ asm volatile("movq %0,%%cr0" :: "r" (val));
+-}
++}
++
++#define read_cr2() current_vcpu_info()->arch.cr2
++
++#define write_cr2(val) ((void)(current_vcpu_info()->arch.cr2 = (val)))
+
+ #define read_cr3() ({ \
+ unsigned long __dummy; \
+@@ -103,27 +107,28 @@ static inline unsigned long read_cr4(voi
+ unsigned long cr4;
+ asm("movq %%cr4,%0" : "=r" (cr4));
+ return cr4;
+-}
++}
+
+ static inline void write_cr4(unsigned long val)
+ {
+ asm volatile("movq %0,%%cr4" :: "r" (val) : "memory");
+-}
+-
+-#define stts() (HYPERVISOR_fpu_taskswitch(1))
++}
+
+-#define wbinvd() \
+- __asm__ __volatile__ ("wbinvd": : :"memory");
++static inline unsigned long read_cr8(void)
++{
++ return 0;
++}
+
+-/*
+- * On SMP systems, when the scheduler does migration-cost autodetection,
+- * it needs a way to flush as much of the CPU's caches as possible.
+- */
+-static inline void sched_cacheflush(void)
++static inline void write_cr8(unsigned long val)
+ {
+- wbinvd();
++ BUG_ON(val);
+ }
+
++#define stts() (HYPERVISOR_fpu_taskswitch(1))
++
++#define wbinvd() \
++ __asm__ __volatile__ ("wbinvd": : :"memory")
++
+ #endif /* __KERNEL__ */
+
+ #define nop() __asm__ __volatile__ ("nop")
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/tlbflush_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_64.h 2008-12-01 11:36:47.000000000 +0100
+@@ -89,7 +89,11 @@ static inline void flush_tlb_range(struc
+
+ #endif
+
+-#define flush_tlb_kernel_range(start, end) flush_tlb_all()
++static inline void flush_tlb_kernel_range(unsigned long start,
++ unsigned long end)
++{
++ flush_tlb_all();
++}
+
+ static inline void flush_tlb_pgtables(struct mm_struct *mm,
+ unsigned long start, unsigned long end)
+Index: head-2008-12-01/include/asm-x86/thread_info.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/thread_info.h 2008-12-01 11:28:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/thread_info.h 2008-12-01 11:36:47.000000000 +0100
+@@ -150,7 +150,8 @@ struct thread_info {
+ #define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
+ #define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
+ #else
+-#define _TIF_WORK_CTXSW _TIF_DEBUG
++#define _TIF_WORK_CTXSW_NEXT (_TIF_NOTSC | _TIF_DEBUG)
++#define _TIF_WORK_CTXSW_PREV (_TIF_NOTSC)
+ #endif
+
+ #define PREEMPT_ACTIVE 0x10000000
+Index: head-2008-12-01/include/asm-x86/xen/interface.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/xen/interface.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/xen/interface.h 2008-12-01 11:36:47.000000000 +0100
+@@ -10,17 +10,17 @@
+ #define __ASM_X86_XEN_INTERFACE_H
+
+ #ifdef __XEN__
+-#define __DEFINE_GUEST_HANDLE(name, type) \
++#define __DEFINE_XEN_GUEST_HANDLE(name, type) \
+ typedef struct { type *p; } __guest_handle_ ## name
+ #else
+-#define __DEFINE_GUEST_HANDLE(name, type) \
++#define __DEFINE_XEN_GUEST_HANDLE(name, type) \
+ typedef type * __guest_handle_ ## name
+ #endif
+
+-#define DEFINE_GUEST_HANDLE_STRUCT(name) \
+- __DEFINE_GUEST_HANDLE(name, struct name)
+-#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name)
+-#define GUEST_HANDLE(name) __guest_handle_ ## name
++#define DEFINE_XEN_GUEST_HANDLE_STRUCT(name) \
++ __DEFINE_XEN_GUEST_HANDLE(name, struct name)
++#define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name)
++#define XEN_GUEST_HANDLE(name) __guest_handle_ ## name
+
+ #ifdef __XEN__
+ #if defined(__i386__)
+@@ -47,14 +47,8 @@
+ #endif
+
+ #ifndef __ASSEMBLY__
+-/* Guest handles for primitive C types. */
+-__DEFINE_GUEST_HANDLE(uchar, unsigned char);
+-__DEFINE_GUEST_HANDLE(uint, unsigned int);
+-__DEFINE_GUEST_HANDLE(ulong, unsigned long);
+-DEFINE_GUEST_HANDLE(char);
+-DEFINE_GUEST_HANDLE(int);
+-DEFINE_GUEST_HANDLE(long);
+-DEFINE_GUEST_HANDLE(void);
++typedef unsigned long xen_pfn_t;
++typedef unsigned long xen_ulong_t;
+ #endif
+
+ #ifndef HYPERVISOR_VIRT_START
+@@ -103,7 +97,7 @@ struct trap_info {
+ uint16_t cs; /* code selector */
+ unsigned long address; /* code offset */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(trap_info);
++DEFINE_XEN_GUEST_HANDLE_STRUCT(trap_info);
+
+ struct arch_shared_info {
+ unsigned long max_pfn; /* max pfn that appears in table */
+@@ -157,7 +151,7 @@ struct vcpu_guest_context {
+ uint64_t gs_base_user;
+ #endif
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(vcpu_guest_context);
++DEFINE_XEN_GUEST_HANDLE_STRUCT(vcpu_guest_context);
+ #endif /* !__ASSEMBLY__ */
+
+ /*
+Index: head-2008-12-01/include/asm-x86/xen/interface_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/xen/interface_32.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/xen/interface_32.h 2008-12-01 11:36:47.000000000 +0100
+@@ -62,7 +62,7 @@ struct cpu_user_regs {
+ uint16_t fs, _pad4;
+ uint16_t gs, _pad5;
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(cpu_user_regs);
++DEFINE_XEN_GUEST_HANDLE_STRUCT(cpu_user_regs);
+
+ typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */
+
+Index: head-2008-12-01/include/linux/elfnote.h
+===================================================================
+--- head-2008-12-01.orig/include/linux/elfnote.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/linux/elfnote.h 2008-12-01 11:36:47.000000000 +0100
+@@ -52,7 +52,7 @@
+ 4484:.balign 4 ; \
+ .popsection ;
+
+-#define ELFNOTE(name, type, desc) \
++#define ELFNOTE(name, type, desc...) \
+ ELFNOTE_START(name, type, "") \
+ desc ; \
+ ELFNOTE_END
+Index: head-2008-12-01/include/linux/page-flags.h
+===================================================================
+--- head-2008-12-01.orig/include/linux/page-flags.h 2008-12-01 11:25:57.000000000 +0100
++++ head-2008-12-01/include/linux/page-flags.h 2008-12-01 11:36:47.000000000 +0100
+@@ -99,6 +99,10 @@ enum pageflags {
+ #endif
+ #ifdef CONFIG_XEN
+ PG_foreign, /* Page is owned by foreign allocator. */
++ PG_pinned, /* Cannot alias with PG_owner_priv_1 since
++ * bad_page() checks include this bit.
++ * Also cannot use PG_arch_1 since that now
++ * has a different purpose on x86. */
+ #endif
+ __NR_PAGEFLAGS,
+
+Index: head-2008-12-01/include/linux/skbuff.h
+===================================================================
+--- head-2008-12-01.orig/include/linux/skbuff.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/linux/skbuff.h 2008-12-01 11:36:47.000000000 +0100
+@@ -1772,7 +1772,7 @@ static inline void skb_forward_csum(stru
+
+ bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off);
+
+-#ifdef CONFIG_XEN
++#if defined(CONFIG_XEN) || defined(CONFIG_PARAVIRT_XEN)
+ int skb_checksum_setup(struct sk_buff *skb);
+ #else
+ static inline int skb_checksum_setup(struct sk_buff *skb) { return 0; }
+Index: head-2008-12-01/include/xen/driver_util.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/driver_util.h 2007-06-12 13:14:19.000000000 +0200
++++ head-2008-12-01/include/xen/driver_util.h 2008-12-01 11:36:47.000000000 +0100
+@@ -5,10 +5,6 @@
+ #include <linux/vmalloc.h>
+ #include <linux/device.h>
+
+-/* Allocate/destroy a 'vmalloc' VM area. */
+-extern struct vm_struct *alloc_vm_area(unsigned long size);
+-extern void free_vm_area(struct vm_struct *area);
+-
+ extern struct class *get_xen_class(void);
+
+ #endif /* __ASM_XEN_DRIVER_UTIL_H__ */
+Index: head-2008-12-01/include/xen/features.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/features.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/xen/features.h 2008-12-01 11:36:47.000000000 +0100
+@@ -10,6 +10,7 @@
+ #define __XEN_FEATURES_H__
+
+ #include <xen/interface/features.h>
++#include <xen/interface/version.h>
+
+ void xen_setup_features(void);
+
+@@ -20,4 +21,4 @@ static inline int xen_feature(int flag)
+ return xen_features[flag];
+ }
+
+-#endif /* __ASM_XEN_FEATURES_H__ */
++#endif /* __XEN_FEATURES_H__ */
+Index: head-2008-12-01/include/xen/interface/arch-x86/xen.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/arch-x86/xen.h 2008-09-01 12:07:31.000000000 +0200
++++ head-2008-12-01/include/xen/interface/arch-x86/xen.h 2008-12-01 11:36:47.000000000 +0100
+@@ -49,6 +49,9 @@
+ #define get_xen_guest_handle(val, hnd) do { val = (hnd).p; } while (0)
+ #endif
+
++/* Allow co-existing Linux 2.6.23+ Xen interface definitions. */
++#define DEFINE_XEN_GUEST_HANDLE_STRUCT(name) struct name
++
+ #if defined(__i386__)
+ #include "xen-x86_32.h"
+ #elif defined(__x86_64__)
+Index: head-2008-12-01/include/xen/interface/event_channel.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/event_channel.h 2008-12-01 11:22:58.000000000 +0100
++++ head-2008-12-01/include/xen/interface/event_channel.h 2008-12-01 11:36:47.000000000 +0100
+@@ -248,6 +248,7 @@ struct evtchn_op {
+ struct evtchn_unmask unmask;
+ } u;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(evtchn_op);
+ typedef struct evtchn_op evtchn_op_t;
+ DEFINE_XEN_GUEST_HANDLE(evtchn_op_t);
+
+Index: head-2008-12-01/include/xen/interface/io/netif.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/io/netif.h 2008-12-01 11:22:58.000000000 +0100
++++ head-2008-12-01/include/xen/interface/io/netif.h 2008-12-01 11:36:47.000000000 +0100
+@@ -183,8 +183,22 @@ typedef struct netif_rx_response netif_r
+ * Generate netif ring structures and types.
+ */
+
++#if defined(CONFIG_XEN) || defined(HAVE_XEN_PLATFORM_COMPAT_H)
+ DEFINE_RING_TYPES(netif_tx, struct netif_tx_request, struct netif_tx_response);
+ DEFINE_RING_TYPES(netif_rx, struct netif_rx_request, struct netif_rx_response);
++#else
++#define xen_netif_tx_request netif_tx_request
++#define xen_netif_rx_request netif_rx_request
++#define xen_netif_tx_response netif_tx_response
++#define xen_netif_rx_response netif_rx_response
++DEFINE_RING_TYPES(xen_netif_tx,
++ struct xen_netif_tx_request,
++ struct xen_netif_tx_response);
++DEFINE_RING_TYPES(xen_netif_rx,
++ struct xen_netif_rx_request,
++ struct xen_netif_rx_response);
++#define xen_netif_extra_info netif_extra_info
++#endif
+
+ #define NETIF_RSP_DROPPED -2
+ #define NETIF_RSP_ERROR -1
+Index: head-2008-12-01/include/xen/interface/memory.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/memory.h 2008-12-01 11:22:59.000000000 +0100
++++ head-2008-12-01/include/xen/interface/memory.h 2008-12-01 11:36:47.000000000 +0100
+@@ -82,6 +82,7 @@ struct xen_memory_reservation {
+ domid_t domid;
+
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_memory_reservation);
+ typedef struct xen_memory_reservation xen_memory_reservation_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_memory_reservation_t);
+
+@@ -175,6 +176,7 @@ struct xen_machphys_mfn_list {
+ */
+ unsigned int nr_extents;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list);
+ typedef struct xen_machphys_mfn_list xen_machphys_mfn_list_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_machphys_mfn_list_t);
+
+@@ -214,6 +216,7 @@ struct xen_add_to_physmap {
+ /* GPFN where the source mapping page should appear. */
+ xen_pfn_t gpfn;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
+ typedef struct xen_add_to_physmap xen_add_to_physmap_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
+
+@@ -254,6 +257,7 @@ struct xen_translate_gpfn_list {
+ */
+ XEN_GUEST_HANDLE(xen_pfn_t) mfn_list;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_translate_gpfn_list);
+ typedef struct xen_translate_gpfn_list xen_translate_gpfn_list_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_translate_gpfn_list_t);
+
+Index: head-2008-12-01/include/xen/interface/sched.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/sched.h 2008-12-01 11:22:59.000000000 +0100
++++ head-2008-12-01/include/xen/interface/sched.h 2008-12-01 11:36:47.000000000 +0100
+@@ -67,6 +67,7 @@
+ struct sched_shutdown {
+ unsigned int reason; /* SHUTDOWN_* */
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(sched_shutdown);
+ typedef struct sched_shutdown sched_shutdown_t;
+ DEFINE_XEN_GUEST_HANDLE(sched_shutdown_t);
+
+@@ -81,6 +82,7 @@ struct sched_poll {
+ unsigned int nr_ports;
+ uint64_t timeout;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(sched_poll);
+ typedef struct sched_poll sched_poll_t;
+ DEFINE_XEN_GUEST_HANDLE(sched_poll_t);
+
+Index: head-2008-12-01/include/xen/interface/version.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/version.h 2008-12-01 11:22:59.000000000 +0100
++++ head-2008-12-01/include/xen/interface/version.h 2008-12-01 11:36:47.000000000 +0100
+@@ -36,6 +36,9 @@
+ /* arg == xen_extraversion_t. */
+ #define XENVER_extraversion 1
+ typedef char xen_extraversion_t[16];
++struct xen_extraversion {
++ xen_extraversion_t extraversion;
++};
+ #define XEN_EXTRAVERSION_LEN (sizeof(xen_extraversion_t))
+
+ /* arg == xen_compile_info_t. */
+@@ -50,10 +53,16 @@ typedef struct xen_compile_info xen_comp
+
+ #define XENVER_capabilities 3
+ typedef char xen_capabilities_info_t[1024];
++struct xen_capabilities_info {
++ xen_capabilities_info_t info;
++};
+ #define XEN_CAPABILITIES_INFO_LEN (sizeof(xen_capabilities_info_t))
+
+ #define XENVER_changeset 4
+ typedef char xen_changeset_info_t[64];
++struct xen_changeset_info {
++ xen_changeset_info_t info;
++};
+ #define XEN_CHANGESET_INFO_LEN (sizeof(xen_changeset_info_t))
+
+ #define XENVER_platform_parameters 5
+Index: head-2008-12-01/include/xen/interface/xen.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/xen.h 2008-12-01 11:22:59.000000000 +0100
++++ head-2008-12-01/include/xen/interface/xen.h 2008-12-01 11:36:47.000000000 +0100
+@@ -32,7 +32,9 @@
+ #include <asm/pvclock-abi.h>
+ #endif
+
+-#if defined(__i386__) || defined(__x86_64__)
++#if defined(CONFIG_PARAVIRT_XEN) && !defined(HAVE_XEN_PLATFORM_COMPAT_H)
++#include <asm/xen/interface.h>
++#elif defined(__i386__) || defined(__x86_64__)
+ #include "arch-x86/xen.h"
+ #elif defined(__ia64__)
+ #include "arch-ia64.h"
+@@ -110,7 +112,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_pfn_t);
+ */
+
+ /* New sched_op hypercall introduced in 0x00030101. */
+-#if __XEN_INTERFACE_VERSION__ < 0x00030101
++#if __XEN_INTERFACE_VERSION__ < 0x00030101 || (defined(CONFIG_PARAVIRT_XEN) && !defined(HAVE_XEN_PLATFORM_COMPAT_H))
+ #undef __HYPERVISOR_sched_op
+ #define __HYPERVISOR_sched_op __HYPERVISOR_sched_op_compat
+ #endif
+@@ -124,7 +126,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_pfn_t);
+ #endif
+
+ /* New platform_op hypercall introduced in 0x00030204. */
+-#if __XEN_INTERFACE_VERSION__ < 0x00030204
++#if __XEN_INTERFACE_VERSION__ < 0x00030204 || (defined(CONFIG_PARAVIRT_XEN) && !defined(HAVE_XEN_PLATFORM_COMPAT_H))
+ #define __HYPERVISOR_dom0_op __HYPERVISOR_platform_op
+ #endif
+
+@@ -283,6 +285,7 @@ struct mmuext_op {
+ xen_pfn_t src_mfn;
+ } arg2;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(mmuext_op);
+ typedef struct mmuext_op mmuext_op_t;
+ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
+ #endif
+@@ -365,6 +368,7 @@ struct mmu_update {
+ uint64_t ptr; /* Machine address of PTE. */
+ uint64_t val; /* New contents of PTE. */
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(mmu_update);
+ typedef struct mmu_update mmu_update_t;
+ DEFINE_XEN_GUEST_HANDLE(mmu_update_t);
+
+@@ -373,9 +377,15 @@ DEFINE_XEN_GUEST_HANDLE(mmu_update_t);
+ * NB. The fields are natural register size for this architecture.
+ */
+ struct multicall_entry {
+- unsigned long op, result;
++ unsigned long op;
++#if !defined(CONFIG_PARAVIRT_XEN) || defined(HAVE_XEN_PLATFORM_COMPAT_H)
++ unsigned long result;
++#else
++ long result;
++#endif
+ unsigned long args[6];
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(multicall_entry);
+ typedef struct multicall_entry multicall_entry_t;
+ DEFINE_XEN_GUEST_HANDLE(multicall_entry_t);
+
+Index: head-2008-12-01/include/xen/xenbus.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/xenbus.h 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/include/xen/xenbus.h 2008-12-01 11:36:47.000000000 +0100
+@@ -57,16 +57,20 @@ struct xenbus_watch
+ void (*callback)(struct xenbus_watch *,
+ const char **vec, unsigned int len);
+
++#if defined(CONFIG_XEN) || defined(HAVE_XEN_PLATFORM_COMPAT_H)
+ /* See XBWF_ definitions below. */
+ unsigned long flags;
++#endif
+ };
+
++#if defined(CONFIG_XEN) || defined(HAVE_XEN_PLATFORM_COMPAT_H)
+ /*
+ * Execute callback in its own kthread. Useful if the callback is long
+ * running or heavily serialised, to avoid taking out the main xenwatch thread
+ * for a long period of time (or even unwittingly causing a deadlock).
+ */
+ #define XBWF_new_thread 1
++#endif
+
+ /* A xenbus device. */
+ struct xenbus_device {
+@@ -214,6 +218,7 @@ int xenbus_watch_path(struct xenbus_devi
+ const char **, unsigned int));
+
+
++#if defined(CONFIG_XEN) || defined(HAVE_XEN_PLATFORM_COMPAT_H)
+ /**
+ * Register a watch on the given path/path2, using the given xenbus_watch
+ * structure for storage, and the given callback function as the callback.
+@@ -227,7 +232,13 @@ int xenbus_watch_path2(struct xenbus_dev
+ const char *path2, struct xenbus_watch *watch,
+ void (*callback)(struct xenbus_watch *,
+ const char **, unsigned int));
+-
++#else
++int xenbus_watch_pathfmt(struct xenbus_device *dev, struct xenbus_watch *watch,
++ void (*callback)(struct xenbus_watch *,
++ const char **, unsigned int),
++ const char *pathfmt, ...)
++ __attribute__ ((format (printf, 4, 5)));
++#endif
+
+ /**
+ * Advertise in the store a change of the given driver to the given new_state.
+Index: head-2008-12-01/net/core/dev.c
+===================================================================
+--- head-2008-12-01.orig/net/core/dev.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/net/core/dev.c 2008-12-01 11:36:47.000000000 +0100
+@@ -131,7 +131,7 @@
+
+ #include "net-sysfs.h"
+
+-#ifdef CONFIG_XEN
++#if defined(CONFIG_XEN) || defined(CONFIG_PARAVIRT_XEN)
+ #include <net/ip.h>
+ #include <linux/tcp.h>
+ #include <linux/udp.h>
+@@ -1740,42 +1740,54 @@ static struct netdev_queue *dev_pick_tx(
+ return netdev_get_tx_queue(dev, queue_index);
+ }
+
+-#ifdef CONFIG_XEN
++#if defined(CONFIG_XEN) || defined(CONFIG_PARAVIRT_XEN)
+ inline int skb_checksum_setup(struct sk_buff *skb)
+ {
+- if (skb->proto_csum_blank) {
+- struct iphdr *iph;
+- unsigned char *th;
++ struct iphdr *iph;
++ unsigned char *th;
++ int err = -EPROTO;
+
+- if (skb->protocol != htons(ETH_P_IP))
+- goto out;
+- iph = ip_hdr(skb);
+- th = skb_network_header(skb) + 4 * iph->ihl;
+- if (th >= skb_tail_pointer(skb))
+- goto out;
+- skb->csum_start = th - skb->head;
+- switch (iph->protocol) {
+- case IPPROTO_TCP:
+- skb->csum_offset = offsetof(struct tcphdr, check);
+- break;
+- case IPPROTO_UDP:
+- skb->csum_offset = offsetof(struct udphdr, check);
+- break;
+- default:
+- if (net_ratelimit())
+- printk(KERN_ERR "Attempting to checksum a non-"
+- "TCP/UDP packet, dropping a protocol"
+- " %d packet", iph->protocol);
+- goto out;
+- }
+- if ((th + skb->csum_offset + 2) > skb_tail_pointer(skb))
+- goto out;
+- skb->ip_summed = CHECKSUM_PARTIAL;
+- skb->proto_csum_blank = 0;
++#ifdef CONFIG_XEN
++ if (!skb->proto_csum_blank)
++ return 0;
++#endif
++
++ if (skb->protocol != htons(ETH_P_IP))
++ goto out;
++
++ iph = ip_hdr(skb);
++ th = skb_network_header(skb) + 4 * iph->ihl;
++ if (th >= skb_tail_pointer(skb))
++ goto out;
++
++ skb->csum_start = th - skb->head;
++ switch (iph->protocol) {
++ case IPPROTO_TCP:
++ skb->csum_offset = offsetof(struct tcphdr, check);
++ break;
++ case IPPROTO_UDP:
++ skb->csum_offset = offsetof(struct udphdr, check);
++ break;
++ default:
++ if (net_ratelimit())
++ printk(KERN_ERR "Attempting to checksum a non-"
++ "TCP/UDP packet, dropping a protocol"
++ " %d packet", iph->protocol);
++ goto out;
+ }
+- return 0;
++
++ if ((th + skb->csum_offset + 2) > skb_tail_pointer(skb))
++ goto out;
++
++#ifdef CONFIG_XEN
++ skb->ip_summed = CHECKSUM_PARTIAL;
++ skb->proto_csum_blank = 0;
++#endif
++
++ err = 0;
++
+ out:
+- return -EPROTO;
++ return err;
+ }
+ EXPORT_SYMBOL(skb_checksum_setup);
+ #endif
--- /dev/null
+From: www.kernel.org
+Subject: Update to 2.6.24
+Patch-mainline: 2.6.24
+
+Automatically created from "patches.kernel.org/patch-2.6.24" by xen-port-patches.py
+
+Acked-by: jbeulich@novell.com
+
+Index: head-2008-12-01/arch/x86/Kconfig
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Kconfig 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/Kconfig 2008-12-01 11:36:55.000000000 +0100
+@@ -50,15 +50,16 @@ config GENERIC_CMOS_UPDATE
+
+ config CLOCKSOURCE_WATCHDOG
+ def_bool y
+- depends on !X86_XEN
++ depends on !XEN
+
+ config GENERIC_CLOCKEVENTS
+ def_bool y
+- depends on !X86_XEN
++ depends on !XEN
+
+ config GENERIC_CLOCKEVENTS_BROADCAST
+ def_bool y
+- depends on X86_64 || (X86_32 && X86_LOCAL_APIC && !X86_XEN)
++ depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
++ depends on !XEN
+
+ config LOCKDEP_SUPPORT
+ def_bool y
+@@ -208,12 +209,12 @@ config X86_TRAMPOLINE
+
+ config X86_NO_TSS
+ bool
+- depends on X86_XEN || X86_64_XEN
++ depends on XEN
+ default y
+
+ config X86_NO_IDT
+ bool
+- depends on X86_XEN || X86_64_XEN
++ depends on XEN
+ default y
+
+ config KTIME_SCALAR
+@@ -283,6 +284,7 @@ config X86_PC
+
+ config X86_XEN
+ bool "Xen-compatible"
++ depends on X86_32
+ select XEN
+ select X86_PAE
+ select X86_UP_APIC if !SMP && XEN_PRIVILEGED_GUEST
+@@ -361,6 +363,7 @@ endif
+
+ config X86_64_XEN
+ bool "Enable Xen compatible kernel"
++ depends on X86_64
+ select XEN
+ select SWIOTLB
+ help
+@@ -413,7 +416,7 @@ config SCHED_NO_NO_OMIT_FRAME_POINTER
+
+ menuconfig PARAVIRT_GUEST
+ bool "Paravirtualized guest support"
+- depends on !X86_XEN && !X86_64_XEN
++ depends on !XEN
+ help
+ Say Y here to get to see options related to running Linux under
+ various hypervisors. This option alone does not add any kernel code.
+@@ -507,7 +510,7 @@ source "arch/x86/Kconfig.cpu"
+ config HPET_TIMER
+ def_bool X86_64
+ prompt "HPET Timer Support" if X86_32
+- depends on !X86_XEN && !X86_64_XEN
++ depends on !XEN
+ help
+ Use the IA-PC HPET (High Precision Event Timer) to manage
+ time in preference to the PIT and RTC, if a HPET is
+@@ -827,7 +830,7 @@ config I8K
+ config X86_REBOOTFIXUPS
+ def_bool n
+ prompt "Enable X86 board specific fixups for reboot"
+- depends on X86_32 && !X86_XEN
++ depends on X86_32 && !XEN
+ ---help---
+ This enables chipset and/or board specific fixups to be done
+ in order to get reboot to work correctly. This is only needed on
+@@ -1160,7 +1163,7 @@ config X86_RESERVE_LOW_64K
+ config MATH_EMULATION
+ bool
+ prompt "Math emulation" if X86_32
+- depends on !X86_XEN
++ depends on !XEN
+ ---help---
+ Linux can emulate a math coprocessor (used for floating point
+ operations) if you don't have one. 486DX and Pentium processors have
+@@ -1268,7 +1271,7 @@ config X86_PAT
+ config EFI
+ def_bool n
+ prompt "EFI runtime service support"
+- depends on ACPI && !X86_XEN && !X86_64_XEN
++ depends on ACPI && !XEN
+ ---help---
+ This enables the kernel to use EFI runtime services that are
+ available (such as the EFI variable services).
+@@ -1283,7 +1286,7 @@ config EFI
+ config IRQBALANCE
+ def_bool y
+ prompt "Enable kernel irq balancing"
+- depends on X86_32 && SMP && X86_IO_APIC && !X86_XEN
++ depends on X86_32 && SMP && X86_IO_APIC && !XEN
+ help
+ The default yes will allow the kernel to do irq load balancing.
+ Saying no will keep the kernel from doing irq load balancing.
+@@ -1429,7 +1432,7 @@ config PHYSICAL_START
+
+ config RELOCATABLE
+ bool "Build a relocatable kernel (EXPERIMENTAL)"
+- depends on EXPERIMENTAL && !X86_XEN && !X86_64_XEN
++ depends on EXPERIMENTAL && !XEN
+ help
+ This builds a kernel image that retains relocation information
+ so it can be loaded someplace besides the default 1MB.
+@@ -1499,6 +1502,7 @@ endmenu
+ config ARCH_ENABLE_MEMORY_HOTPLUG
+ def_bool y
+ depends on X86_64 || (X86_32 && HIGHMEM)
++ depends on !XEN
+
+ config HAVE_ARCH_EARLY_PFN_TO_NID
+ def_bool X86_64
+@@ -1689,7 +1693,7 @@ choice
+
+ config PCI_GOBIOS
+ bool "BIOS"
+- depends on !X86_XEN
++ depends on !XEN
+
+ config PCI_GOMMCONFIG
+ bool "MMConfig"
+@@ -1740,7 +1744,7 @@ config PCI_MMCONFIG
+
+ config XEN_PCIDEV_FRONTEND
+ bool "Xen PCI Frontend" if X86_64
+- depends on PCI && ((X86_XEN && (PCI_GOXEN_FE || PCI_GOANY)) || X86_64_XEN)
++ depends on PCI && XEN && (PCI_GOXEN_FE || PCI_GOANY || X86_64)
+ select HOTPLUG
+ default y
+ help
+@@ -1757,6 +1761,7 @@ config XEN_PCIDEV_FE_DEBUG
+ config DMAR
+ bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
+ depends on X86_64 && PCI_MSI && ACPI && EXPERIMENTAL
++ depends on !XEN
+ help
+ DMA remapping (DMAR) devices support enables independent address
+ translations for Direct Memory Access (DMA) from devices.
+Index: head-2008-12-01/arch/x86/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Makefile 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/Makefile 2008-12-01 11:36:55.000000000 +0100
+@@ -191,8 +191,8 @@ PHONY += zImage bzImage vmlinuz compress
+ zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
+
+ ifdef CONFIG_XEN
+-CPPFLAGS := -D__XEN_INTERFACE_VERSION__=$(CONFIG_XEN_INTERFACE_VERSION) \
+- -Iinclude$(if $(KBUILD_SRC),2)/asm/mach-xen $(CPPFLAGS)
++KBUILD_CPPFLAGS := -D__XEN_INTERFACE_VERSION__=$(CONFIG_XEN_INTERFACE_VERSION) \
++ -Iinclude$(if $(KBUILD_SRC),2)/asm/mach-xen $(KBUILD_CPPFLAGS)
+
+ ifdef CONFIG_X86_64
+ LDFLAGS_vmlinux := -e startup_64
+@@ -206,6 +206,8 @@ KBUILD_IMAGE := $(boot)/vmlinuz
+
+ vmlinuz: vmlinux
+ $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
++ $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
++ $(Q)ln -fsn ../../x86/boot/$@ $(objtree)/arch/$(UTS_MACHINE)/boot/$@
+ else
+ # Default kernel to build
+ all: bzImage
+Index: head-2008-12-01/arch/x86/ia32/ia32entry-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/ia32/ia32entry-xen.S 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/ia32/ia32entry-xen.S 2008-12-01 11:36:55.000000000 +0100
+@@ -125,20 +125,16 @@ sysenter_do_call:
+ jmp int_ret_from_sys_call
+
+ sysenter_tracesys:
++ xchgl %r9d,%ebp
+ SAVE_REST
+ CLEAR_RREGS
++ movq %r9,R9(%rsp)
+ movq $-ENOSYS,RAX(%rsp) /* really needed? */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
+- movl %ebp, %ebp
+- /* no need to do an access_ok check here because rbp has been
+- 32bit zero extended */
+-1: movl (%rbp),%r9d
+- .section __ex_table,"a"
+- .quad 1b,ia32_badarg
+- .previous
++ xchgl %ebp,%r9d
+ jmp sysenter_do_call
+ CFI_ENDPROC
+ ENDPROC(ia32_sysenter_target)
+@@ -200,20 +196,17 @@ cstar_do_call:
+ jmp int_ret_from_sys_call
+
+ cstar_tracesys:
++ xchgl %r9d,%ebp
+ SAVE_REST
+ CLEAR_RREGS
++ movq %r9,R9(%rsp)
+ movq $-ENOSYS,RAX(%rsp) /* really needed? */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
++ xchgl %ebp,%r9d
+ movl RSP-ARGOFFSET(%rsp), %r8d
+- /* no need to do an access_ok check here because r8 has been
+- 32bit zero extended */
+-1: movl (%r8),%r9d
+- .section __ex_table,"a"
+- .quad 1b,ia32_badarg
+- .previous
+ jmp cstar_do_call
+ END(ia32_cstar_target)
+
+Index: head-2008-12-01/arch/x86/kernel/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/Makefile 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/Makefile 2008-12-01 11:36:55.000000000 +0100
+@@ -127,4 +127,4 @@ endif
+ disabled-obj-$(CONFIG_XEN) := early-quirks.o hpet.o i8253.o i8259_$(BITS).o reboot.o \
+ smpboot_$(BITS).o tsc_$(BITS).o tsc_sync.o
+ disabled-obj-$(CONFIG_XEN_UNPRIVILEGED_GUEST) += mpparse_64.o
+-%/head_64.o %/head_64.s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
++%/head_64.o %/head_64.s: asflags-$(CONFIG_XEN) :=
+Index: head-2008-12-01/arch/x86/kernel/acpi/sleep_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/sleep_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/acpi/sleep_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -90,7 +90,7 @@ __setup("acpi_sleep=", acpi_sleep_setup)
+
+ /* Ouch, we want to delete this. We already have better version in userspace, in
+ s2ram from suspend.sf.net project */
+-static __init int reset_videomode_after_s3(struct dmi_system_id *d)
++static __init int reset_videomode_after_s3(const struct dmi_system_id *d)
+ {
+ acpi_realmode_flags |= 2;
+ return 0;
+Index: head-2008-12-01/arch/x86/kernel/acpi/sleep_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/sleep_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/acpi/sleep_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -123,6 +123,3 @@ static int __init acpi_sleep_setup(char
+ __setup("acpi_sleep=", acpi_sleep_setup);
+ #endif /* CONFIG_ACPI_PV_SLEEP */
+
+-void acpi_pci_link_exit(void)
+-{
+-}
+Index: head-2008-12-01/arch/x86/kernel/apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/apic_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/apic_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -63,22 +63,38 @@ int setup_profiling_timer(unsigned int m
+
+ void smp_local_timer_interrupt(void)
+ {
+- profile_tick(CPU_PROFILING);
+ #ifndef CONFIG_XEN
+-#ifdef CONFIG_SMP
+- update_process_times(user_mode(get_irq_regs()));
+-#endif
+-#endif
++ int cpu = smp_processor_id();
++ struct clock_event_device *evt = &per_cpu(lapic_events, cpu);
++
+ /*
+- * We take the 'long' return path, and there every subsystem
+- * grabs the appropriate locks (kernel lock/ irq lock).
++ * Normally we should not be here till LAPIC has been initialized but
++ * in some cases like kdump, its possible that there is a pending LAPIC
++ * timer interrupt from previous kernel's context and is delivered in
++ * new kernel the moment interrupts are enabled.
+ *
+- * We might want to decouple profiling from the 'long path',
+- * and do the profiling totally in assembly.
+- *
+- * Currently this isn't too much of an issue (performance wise),
+- * we can take more than 100K local irqs per second on a 100 MHz P5.
++ * Interrupts are enabled early and LAPIC is setup much later, hence
++ * its possible that when we get here evt->event_handler is NULL.
++ * Check for event_handler being NULL and discard the interrupt as
++ * spurious.
++ */
++ if (!evt->event_handler) {
++ printk(KERN_WARNING
++ "Spurious LAPIC timer interrupt on cpu %d\n", cpu);
++ /* Switch it off */
++ lapic_timer_setup(CLOCK_EVT_MODE_SHUTDOWN, evt);
++ return;
++ }
++#endif
++
++ /*
++ * the NMI deadlock-detector uses this.
+ */
++ add_pda(apic_timer_irqs, 1);
++
++#ifndef CONFIG_XEN
++ evt->event_handler(evt);
++#endif
+ }
+
+ /*
+@@ -94,11 +110,6 @@ void smp_apic_timer_interrupt(struct pt_
+ struct pt_regs *old_regs = set_irq_regs(regs);
+
+ /*
+- * the NMI deadlock-detector uses this.
+- */
+- add_pda(apic_timer_irqs, 1);
+-
+- /*
+ * NOTE! We'd better ACK the irq immediately,
+ * because timer handling can be slow.
+ */
+@@ -132,6 +143,7 @@ asmlinkage void smp_spurious_interrupt(v
+ if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
+ ack_APIC_irq();
+
++ add_pda(irq_spurious_count, 1);
+ irq_exit();
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/cpu/common-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -214,7 +214,7 @@ static void __cpuinit get_cpu_vendor(str
+
+ static int __init x86_fxsr_setup(char * s)
+ {
+- /* Tell all the other CPU's to not use it... */
++ /* Tell all the other CPUs to not use it... */
+ disable_x86_fxsr = 1;
+
+ /*
+Index: head-2008-12-01/arch/x86/kernel/e820_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/e820_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/e820_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -52,6 +52,13 @@ struct resource code_resource = {
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+ };
+
++struct resource bss_resource = {
++ .name = "Kernel bss",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
+ static struct resource system_rom_resource = {
+ .name = "System ROM",
+ .start = 0xf0000,
+@@ -266,7 +273,9 @@ static struct e820map machine_e820;
+ * and also for regions reported as reserved by the e820.
+ */
+ static void __init
+-legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
++legacy_init_iomem_resources(struct resource *code_resource,
++ struct resource *data_resource,
++ struct resource *bss_resource)
+ {
+ int i;
+
+@@ -300,9 +309,11 @@ legacy_init_iomem_resources(struct resou
+ #ifndef CONFIG_XEN
+ request_resource(res, code_resource);
+ request_resource(res, data_resource);
++ request_resource(res, bss_resource);
+ #endif
+ #ifdef CONFIG_KEXEC
+- request_resource(res, &crashk_res);
++ if (crashk_res.start != crashk_res.end)
++ request_resource(res, &crashk_res);
+ #ifdef CONFIG_XEN
+ xen_machine_kexec_register_resources(res);
+ #endif
+@@ -329,9 +340,11 @@ static int __init request_standard_resou
+
+ printk("Setting up standard PCI resources\n");
+ if (efi_enabled)
+- efi_initialize_iomem_resources(&code_resource, &data_resource);
++ efi_initialize_iomem_resources(&code_resource,
++ &data_resource, &bss_resource);
+ else
+- legacy_init_iomem_resources(&code_resource, &data_resource);
++ legacy_init_iomem_resources(&code_resource,
++ &data_resource, &bss_resource);
+
+ /* EFI systems may still have VGA */
+ request_resource(&iomem_resource, &video_ram_resource);
+@@ -774,7 +787,7 @@ void __init e820_register_memory(void)
+ #endif
+
+ /*
+- * Search for the bigest gap in the low 32 bits of the e820
++ * Search for the biggest gap in the low 32 bits of the e820
+ * memory space.
+ */
+ last = 0x100000000ull;
+Index: head-2008-12-01/arch/x86/kernel/e820_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/e820_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/e820_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -24,7 +24,7 @@
+ #include <asm/page.h>
+ #include <asm/e820.h>
+ #include <asm/proto.h>
+-#include <asm/bootsetup.h>
++#include <asm/setup.h>
+ #include <asm/sections.h>
+ #include <xen/interface/memory.h>
+
+@@ -51,7 +51,7 @@ unsigned long end_pfn_map;
+ */
+ static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
+
+-extern struct resource code_resource, data_resource;
++extern struct resource code_resource, data_resource, bss_resource;
+
+ /* Check for some hardcoded bad areas that early boot is not allowed to touch */
+ static inline int bad_addr(unsigned long *addrp, unsigned long size)
+@@ -73,10 +73,15 @@ static inline int bad_addr(unsigned long
+
+ /* initrd */
+ #ifdef CONFIG_BLK_DEV_INITRD
+- if (LOADER_TYPE && INITRD_START && last >= INITRD_START &&
+- addr < INITRD_START+INITRD_SIZE) {
+- *addrp = PAGE_ALIGN(INITRD_START + INITRD_SIZE);
+- return 1;
++ if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
++ unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
++ unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
++ unsigned long ramdisk_end = ramdisk_image+ramdisk_size;
++
++ if (last >= ramdisk_image && addr < ramdisk_end) {
++ *addrp = PAGE_ALIGN(ramdisk_end);
++ return 1;
++ }
+ }
+ #endif
+ /* kernel code */
+@@ -249,6 +254,7 @@ void __init e820_reserve_resources(struc
+ #ifndef CONFIG_XEN
+ request_resource(res, &code_resource);
+ request_resource(res, &data_resource);
++ request_resource(res, &bss_resource);
+ #endif
+ #ifdef CONFIG_KEXEC
+ if (crashk_res.start != crashk_res.end)
+@@ -650,8 +656,8 @@ void __init setup_memory_region(void)
+ * Otherwise fake a memory map; one section from 0k->640k,
+ * the next section from 1mb->appropriate_mem_k
+ */
+- sanitize_e820_map(E820_MAP, &E820_MAP_NR);
+- if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0)
++ sanitize_e820_map(boot_params.e820_map, &boot_params.e820_entries);
++ if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries) < 0)
+ early_panic("Cannot find a valid memory map");
+ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+ e820_print_map("BIOS-e820");
+@@ -836,3 +842,22 @@ __init void e820_setup_gap(struct e820en
+ printk(KERN_INFO "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
+ pci_mem_start, gapstart, gapsize);
+ }
++
++int __init arch_get_ram_range(int slot, u64 *addr, u64 *size)
++{
++ int i;
++
++ if (slot < 0 || slot >= e820.nr_map)
++ return -1;
++ for (i = slot; i < e820.nr_map; i++) {
++ if (e820.map[i].type != E820_RAM)
++ continue;
++ break;
++ }
++ if (i == e820.nr_map || e820.map[i].addr > (max_pfn << PAGE_SHIFT))
++ return -1;
++ *addr = e820.map[i].addr;
++ *size = min_t(u64, e820.map[i].size + e820.map[i].addr,
++ max_pfn << PAGE_SHIFT) - *addr;
++ return i + 1;
++}
+Index: head-2008-12-01/arch/x86/kernel/early_printk-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/early_printk-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/early_printk-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -6,14 +6,9 @@
+ #include <asm/io.h>
+ #include <asm/processor.h>
+ #include <asm/fcntl.h>
++#include <asm/setup.h>
+
+ /* Simple VGA output */
+-
+-#ifdef __i386__
+-#include <asm/setup.h>
+-#else
+-#include <asm/bootsetup.h>
+-#endif
+ #define VGABASE (__ISA_IO_base + 0xb8000)
+
+ #ifndef CONFIG_XEN
+@@ -264,10 +259,10 @@ static int __init setup_early_printk(cha
+ early_console = &early_serial_console;
+ } else if (!strncmp(buf, "vga", 3)) {
+ #ifndef CONFIG_XEN
+- && SCREEN_INFO.orig_video_isVGA == 1) {
+- max_xpos = SCREEN_INFO.orig_video_cols;
+- max_ypos = SCREEN_INFO.orig_video_lines;
+- current_ypos = SCREEN_INFO.orig_y;
++ && boot_params.screen_info.orig_video_isVGA == 1) {
++ max_xpos = boot_params.screen_info.orig_video_cols;
++ max_ypos = boot_params.screen_info.orig_video_lines;
++ current_ypos = boot_params.screen_info.orig_y;
+ #endif
+ early_console = &early_vga_console;
+ } else if (!strncmp(buf, "simnow", 6)) {
+Index: head-2008-12-01/arch/x86/kernel/entry_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:36:55.000000000 +0100
+@@ -254,6 +254,7 @@ check_userspace:
+ jb resume_kernel # not returning to v8086 or userspace
+
+ ENTRY(resume_userspace)
++ LOCKDEP_SYS_EXIT
+ DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
+ # setting need_resched or sigpending
+ # between sampling and the iret
+@@ -341,6 +342,7 @@ sysenter_past_esp:
+ jae syscall_badsys
+ call *sys_call_table(,%eax,4)
+ movl %eax,PT_EAX(%esp)
++ LOCKDEP_SYS_EXIT
+ DISABLE_INTERRUPTS(CLBR_ANY)
+ TRACE_IRQS_OFF
+ movl TI_flags(%ebp), %ecx
+@@ -406,6 +408,7 @@ syscall_call:
+ call *sys_call_table(,%eax,4)
+ movl %eax,PT_EAX(%esp) # store the return value
+ syscall_exit:
++ LOCKDEP_SYS_EXIT
+ DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
+ # setting need_resched or sigpending
+ # between sampling and the iret
+@@ -478,7 +481,7 @@ ldt_ss:
+ * is still available to implement the setting of the high
+ * 16-bits in the INTERRUPT_RETURN paravirt-op.
+ */
+- cmpl $0, paravirt_ops+PARAVIRT_enabled
++ cmpl $0, pv_info+PARAVIRT_enabled
+ jne restore_nocheck
+ #endif
+
+@@ -540,6 +543,7 @@ work_pending:
+ jz work_notifysig
+ work_resched:
+ call schedule
++ LOCKDEP_SYS_EXIT
+ DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
+ # setting need_resched or sigpending
+ # between sampling and the iret
+@@ -1264,6 +1268,6 @@ ENTRY(kernel_thread_helper)
+ ENDPROC(kernel_thread_helper)
+
+ .section .rodata,"a"
+-#include "syscall_table.S"
++#include "syscall_table_32.S"
+
+ syscall_table_size=(.-sys_call_table)
+Index: head-2008-12-01/arch/x86/kernel/entry_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:36:55.000000000 +0100
+@@ -57,7 +57,7 @@
+ #include <xen/interface/arch-x86_64.h>
+ #include <xen/interface/features.h>
+
+-#include "xen_entry.S"
++#include "xen_entry_64.S"
+
+ .code64
+
+@@ -275,6 +275,7 @@ ret_from_sys_call:
+ movl $_TIF_ALLWORK_MASK,%edi
+ /* edi: flagmask */
+ sysret_check:
++ LOCKDEP_SYS_EXIT
+ GET_THREAD_INFO(%rcx)
+ XEN_BLOCK_EVENTS(%rsi)
+ TRACE_IRQS_OFF
+@@ -365,6 +366,7 @@ int_ret_from_sys_call:
+ movl $_TIF_ALLWORK_MASK,%edi
+ /* edi: mask to check */
+ int_with_check:
++ LOCKDEP_SYS_EXIT_IRQ
+ GET_THREAD_INFO(%rcx)
+ movl threadinfo_flags(%rcx),%edx
+ andl %edi,%edx
+@@ -516,11 +518,12 @@ END(stub_rt_sigreturn)
+
+ retint_check:
+ CFI_DEFAULT_STACK adj=1
++ LOCKDEP_SYS_EXIT_IRQ
+ movl threadinfo_flags(%rcx),%edx
+ andl %edi,%edx
+ CFI_REMEMBER_STATE
+ jnz retint_careful
+-retint_restore_args:
++retint_restore_args: /* return to kernel space */
+ movl EFLAGS-REST_SKIP(%rsp), %eax
+ shr $9, %eax # EAX[0] == IRET_EFLAGS.IF
+ XEN_GET_VCPU_INFO(%rsi)
+@@ -841,7 +844,7 @@ error_call_handler:
+ movq ORIG_RAX(%rsp),%rsi # get error code
+ movq $-1,ORIG_RAX(%rsp)
+ call *%rax
+-error_exit:
++error_exit:
+ RESTORE_REST
+ /* cli */
+ XEN_BLOCK_EVENTS(%rsi)
+@@ -849,14 +852,11 @@ error_exit:
+ GET_THREAD_INFO(%rcx)
+ testb $3,CS-ARGOFFSET(%rsp)
+ jz retint_kernel
++ LOCKDEP_SYS_EXIT_IRQ
+ movl threadinfo_flags(%rcx),%edx
+ movl $_TIF_WORK_MASK,%edi
+ andl %edi,%edx
+ jnz retint_careful
+- /*
+- * The iret might restore flags:
+- */
+- TRACE_IRQS_IRETQ
+ jmp retint_restore_args
+
+ #if 0
+@@ -1071,7 +1071,7 @@ child_rip:
+ movq %rsi, %rdi
+ call *%rax
+ # exit
+- xorl %edi, %edi
++ mov %eax, %edi
+ call do_exit
+ CFI_ENDPROC
+ ENDPROC(child_rip)
+Index: head-2008-12-01/arch/x86/kernel/genapic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/genapic_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/genapic_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -24,12 +24,21 @@
+ #include <acpi/acpi_bus.h>
+ #endif
+
+-/* which logical CPU number maps to which CPU (physical APIC ID) */
+-u8 x86_cpu_to_apicid[NR_CPUS] __read_mostly
++/*
++ * which logical CPU number maps to which CPU (physical APIC ID)
++ *
++ * The following static array is used during kernel startup
++ * and the x86_cpu_to_apicid_ptr contains the address of the
++ * array during this time. Is it zeroed when the per_cpu
++ * data area is removed.
++ */
++#ifndef CONFIG_XEN
++u8 x86_cpu_to_apicid_init[NR_CPUS] __initdata
+ = { [0 ... NR_CPUS-1] = BAD_APICID };
+-EXPORT_SYMBOL(x86_cpu_to_apicid);
+-
+-u8 x86_cpu_to_log_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
++void *x86_cpu_to_apicid_ptr;
++#endif
++DEFINE_PER_CPU(u8, x86_cpu_to_apicid) = BAD_APICID;
++EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
+
+ #ifndef CONFIG_XEN
+ struct genapic __read_mostly *genapic = &apic_flat;
+Index: head-2008-12-01/arch/x86/kernel/head64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,5 +1,5 @@
+ /*
+- * linux/arch/x86_64/kernel/head64.c -- prepare to run common code
++ * prepare to run common code
+ *
+ * Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
+ *
+@@ -21,7 +21,6 @@
+ #include <asm/processor.h>
+ #include <asm/proto.h>
+ #include <asm/smp.h>
+-#include <asm/bootsetup.h>
+ #include <asm/setup.h>
+ #include <asm/desc.h>
+ #include <asm/pgtable.h>
+@@ -47,27 +46,16 @@ static void __init clear_bss(void)
+ }
+ #endif
+
+-#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
+-#define OLD_CL_MAGIC_ADDR 0x20
+-#define OLD_CL_MAGIC 0xA33F
+-#define OLD_CL_OFFSET 0x22
+-
+ static void __init copy_bootdata(char *real_mode_data)
+ {
+ #ifndef CONFIG_XEN
+- unsigned long new_data;
+ char * command_line;
+
+- memcpy(x86_boot_params, real_mode_data, BOOT_PARAM_SIZE);
+- new_data = *(u32 *) (x86_boot_params + NEW_CL_POINTER);
+- if (!new_data) {
+- if (OLD_CL_MAGIC != *(u16 *)(real_mode_data + OLD_CL_MAGIC_ADDR)) {
+- return;
+- }
+- new_data = __pa(real_mode_data) + *(u16 *)(real_mode_data + OLD_CL_OFFSET);
++ memcpy(&boot_params, real_mode_data, sizeof boot_params);
++ if (boot_params.hdr.cmd_line_ptr) {
++ command_line = __va(boot_params.hdr.cmd_line_ptr);
++ memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+ }
+- command_line = __va(new_data);
+- memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+ #else
+ int max_cmdline;
+
+@@ -117,7 +105,7 @@ void __init x86_64_start_kernel(char * r
+
+ for (i = 0; i < IDT_ENTRIES; i++)
+ set_intr_gate(i, early_idt_handler);
+- asm volatile("lidt %0" :: "m" (idt_descr));
++ load_idt((const struct desc_ptr *)&idt_descr);
+ #endif
+
+ early_printk("Kernel alive\n");
+Index: head-2008-12-01/arch/x86/kernel/init_task-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/init_task-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/init_task-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -14,11 +14,11 @@ static struct fs_struct init_fs = INIT_F
+ static struct files_struct init_files = INIT_FILES;
+ static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+ static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+-
++#ifdef CONFIG_X86_XEN
+ #define swapper_pg_dir ((pgd_t *)NULL)
++#endif
+ struct mm_struct init_mm = INIT_MM(init_mm);
+ #undef swapper_pg_dir
+-
+ EXPORT_SYMBOL(init_mm);
+
+ /*
+@@ -28,7 +28,7 @@ EXPORT_SYMBOL(init_mm);
+ * way process stacks are handled. This is done by having a special
+ * "init_task" linker map entry..
+ */
+-union thread_union init_thread_union
++union thread_union init_thread_union
+ __attribute__((__section__(".data.init_task"))) =
+ { INIT_THREAD_INFO(init_task) };
+
+@@ -38,14 +38,15 @@ union thread_union init_thread_union
+ * All other task structs will be allocated on slabs in fork.c
+ */
+ struct task_struct init_task = INIT_TASK(init_task);
+-
+ EXPORT_SYMBOL(init_task);
+
+ #ifndef CONFIG_X86_NO_TSS
+ /*
+- * per-CPU TSS segments. Threads are completely 'soft' on Linux,
+- * no more per-task TSS's.
+- */
++ * no more per-task TSS's. The TSS size is kept cacheline-aligned
++ * so they are allowed to end up in the .data.cacheline_aligned
++ * section. Since TSS's are completely CPU-local, we want them
++ * on exact cacheline boundaries, to eliminate cacheline ping-pong.
++ */
+ DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;
+ #endif
+
+Index: head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -427,7 +427,7 @@ static struct irq_cpu_info {
+
+ #define IRQ_ALLOWED(cpu, allowed_mask) cpu_isset(cpu, allowed_mask)
+
+-#define CPU_TO_PACKAGEINDEX(i) (first_cpu(cpu_sibling_map[i]))
++#define CPU_TO_PACKAGEINDEX(i) (first_cpu(per_cpu(cpu_sibling_map, i)))
+
+ static cpumask_t balance_irq_affinity[NR_IRQS] = {
+ [0 ... NR_IRQS-1] = CPU_MASK_ALL
+@@ -633,7 +633,7 @@ tryanotherirq:
+
+ imbalance = move_this_load;
+
+- /* For physical_balance case, we accumlated both load
++ /* For physical_balance case, we accumulated both load
+ * values in the one of the siblings cpu_irq[],
+ * to use the same code for physical and logical processors
+ * as much as possible.
+@@ -647,7 +647,7 @@ tryanotherirq:
+ * (A+B)/2 vs B
+ */
+ load = CPU_IRQ(min_loaded) >> 1;
+- for_each_cpu_mask(j, cpu_sibling_map[min_loaded]) {
++ for_each_cpu_mask(j, per_cpu(cpu_sibling_map, min_loaded)) {
+ if (load > CPU_IRQ(j)) {
+ /* This won't change cpu_sibling_map[min_loaded] */
+ load = CPU_IRQ(j);
+@@ -1018,7 +1018,7 @@ static int EISA_ELCR(unsigned int irq)
+ #define default_MCA_trigger(idx) (1)
+ #define default_MCA_polarity(idx) (0)
+
+-static int __init MPBIOS_polarity(int idx)
++static int MPBIOS_polarity(int idx)
+ {
+ int bus = mp_irqs[idx].mpc_srcbus;
+ int polarity;
+@@ -1347,6 +1347,11 @@ static void __init setup_IO_APIC_irqs(vo
+ continue;
+ }
+
++ if (!first_notcon) {
++ apic_printk(APIC_VERBOSE, " not connected.\n");
++ first_notcon = 1;
++ }
++
+ entry.trigger = irq_trigger(idx);
+ entry.polarity = irq_polarity(idx);
+
+@@ -1936,13 +1941,16 @@ __setup("no_timer_check", notimercheck);
+ static int __init timer_irq_works(void)
+ {
+ unsigned long t1 = jiffies;
++ unsigned long flags;
+
+ if (no_timer_check)
+ return 1;
+
++ local_save_flags(flags);
+ local_irq_enable();
+ /* Let ten ticks pass... */
+ mdelay((10 * 1000) / HZ);
++ local_irq_restore(flags);
+
+ /*
+ * Expect a few ticks at least, to be sure some possible
+@@ -2223,6 +2231,9 @@ static inline void __init check_timer(vo
+ {
+ int apic1, pin1, apic2, pin2;
+ int vector;
++ unsigned long flags;
++
++ local_irq_save(flags);
+
+ /*
+ * get/set the timer IRQ vector:
+@@ -2268,7 +2279,7 @@ static inline void __init check_timer(vo
+ }
+ if (disable_timer_pin_1 > 0)
+ clear_IO_APIC_pin(0, pin1);
+- return;
++ goto out;
+ }
+ clear_IO_APIC_pin(apic1, pin1);
+ printk(KERN_ERR "..MP-BIOS bug: 8254 timer not connected to "
+@@ -2291,7 +2302,7 @@ static inline void __init check_timer(vo
+ if (nmi_watchdog == NMI_IO_APIC) {
+ setup_nmi();
+ }
+- return;
++ goto out;
+ }
+ /*
+ * Cleanup, just in case ...
+@@ -2315,7 +2326,7 @@ static inline void __init check_timer(vo
+
+ if (timer_irq_works()) {
+ printk(" works.\n");
+- return;
++ goto out;
+ }
+ apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
+ printk(" failed.\n");
+@@ -2331,11 +2342,13 @@ static inline void __init check_timer(vo
+
+ if (timer_irq_works()) {
+ printk(" works.\n");
+- return;
++ goto out;
+ }
+ printk(" failed :(.\n");
+ panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a "
+ "report. Then try booting with the 'noapic' option");
++out:
++ local_irq_restore(flags);
+ }
+ #else
+ int timer_uses_ioapic_pin_0 = 0;
+@@ -2353,6 +2366,14 @@ int timer_uses_ioapic_pin_0 = 0;
+
+ void __init setup_IO_APIC(void)
+ {
++#ifndef CONFIG_XEN
++ int i;
++
++ /* Reserve all the system vectors. */
++ for (i = FIRST_SYSTEM_VECTOR; i < NR_VECTORS; i++)
++ set_bit(i, used_vectors);
++#endif
++
+ enable_IO_APIC();
+
+ if (acpi_ioapic)
+@@ -2542,7 +2563,7 @@ void destroy_irq(unsigned int irq)
+ #endif /* CONFIG_XEN */
+
+ /*
+- * MSI mesage composition
++ * MSI message composition
+ */
+ #if defined(CONFIG_PCI_MSI) && !defined(CONFIG_XEN)
+ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
+@@ -2899,6 +2920,25 @@ int io_apic_set_pci_routing (int ioapic,
+ return 0;
+ }
+
++int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
++{
++ int i;
++
++ if (skip_ioapic_setup)
++ return -1;
++
++ for (i = 0; i < mp_irq_entries; i++)
++ if (mp_irqs[i].mpc_irqtype == mp_INT &&
++ mp_irqs[i].mpc_srcbusirq == bus_irq)
++ break;
++ if (i >= mp_irq_entries)
++ return -1;
++
++ *trigger = irq_trigger(i);
++ *polarity = irq_polarity(i);
++ return 0;
++}
++
+ #endif /* CONFIG_ACPI */
+
+ static int __init parse_disable_timer_pin_1(char *arg)
+Index: head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -31,6 +31,7 @@
+ #include <linux/sysdev.h>
+ #include <linux/msi.h>
+ #include <linux/htirq.h>
++#include <linux/dmar.h>
+ #ifdef CONFIG_ACPI
+ #include <acpi/acpi_bus.h>
+ #endif
+@@ -584,7 +585,7 @@ int IO_APIC_get_PCI_irq_vector(int bus,
+ #define default_PCI_trigger(idx) (1)
+ #define default_PCI_polarity(idx) (1)
+
+-static int __init MPBIOS_polarity(int idx)
++static int MPBIOS_polarity(int idx)
+ {
+ int bus = mp_irqs[idx].mpc_srcbus;
+ int polarity;
+@@ -871,6 +872,10 @@ static void __init setup_IO_APIC_irqs(vo
+ apic_printk(APIC_VERBOSE, ", %d-%d", mp_ioapics[apic].mpc_apicid, pin);
+ continue;
+ }
++ if (!first_notcon) {
++ apic_printk(APIC_VERBOSE, " not connected.\n");
++ first_notcon = 1;
++ }
+
+ irq = pin_2_irq(idx, apic, pin);
+ add_pin_to_irq(irq, apic, pin);
+@@ -881,7 +886,7 @@ static void __init setup_IO_APIC_irqs(vo
+ }
+
+ if (!first_notcon)
+- apic_printk(APIC_VERBOSE," not connected.\n");
++ apic_printk(APIC_VERBOSE, " not connected.\n");
+ }
+
+ #ifndef CONFIG_XEN
+@@ -1277,10 +1282,13 @@ void disable_IO_APIC(void)
+ static int __init timer_irq_works(void)
+ {
+ unsigned long t1 = jiffies;
++ unsigned long flags;
+
++ local_save_flags(flags);
+ local_irq_enable();
+ /* Let ten ticks pass... */
+ mdelay((10 * 1000) / HZ);
++ local_irq_restore(flags);
+
+ /*
+ * Expect a few ticks at least, to be sure some possible
+@@ -1655,6 +1663,9 @@ static inline void check_timer(void)
+ {
+ struct irq_cfg *cfg = irq_cfg + 0;
+ int apic1, pin1, apic2, pin2;
++ unsigned long flags;
++
++ local_irq_save(flags);
+
+ /*
+ * get/set the timer IRQ vector:
+@@ -1696,7 +1707,7 @@ static inline void check_timer(void)
+ }
+ if (disable_timer_pin_1 > 0)
+ clear_IO_APIC_pin(0, pin1);
+- return;
++ goto out;
+ }
+ clear_IO_APIC_pin(apic1, pin1);
+ apic_printk(APIC_QUIET,KERN_ERR "..MP-BIOS bug: 8254 timer not "
+@@ -1718,7 +1729,7 @@ static inline void check_timer(void)
+ if (nmi_watchdog == NMI_IO_APIC) {
+ setup_nmi();
+ }
+- return;
++ goto out;
+ }
+ /*
+ * Cleanup, just in case ...
+@@ -1741,7 +1752,7 @@ static inline void check_timer(void)
+
+ if (timer_irq_works()) {
+ apic_printk(APIC_VERBOSE," works.\n");
+- return;
++ goto out;
+ }
+ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector);
+ apic_printk(APIC_VERBOSE," failed.\n");
+@@ -1756,10 +1767,12 @@ static inline void check_timer(void)
+
+ if (timer_irq_works()) {
+ apic_printk(APIC_VERBOSE," works.\n");
+- return;
++ goto out;
+ }
+ apic_printk(APIC_VERBOSE," failed :(.\n");
+ panic("IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter\n");
++out:
++ local_irq_restore(flags);
+ }
+ #else
+ #define check_timer() ((void)0)
+@@ -1775,7 +1788,7 @@ __setup("no_timer_check", notimercheck);
+
+ /*
+ *
+- * IRQ's that are handled by the PIC in the MPS IOAPIC case.
++ * IRQs that are handled by the PIC in the MPS IOAPIC case.
+ * - IRQ2 is the cascade IRQ, and cannot be a io-apic IRQ.
+ * Linux doesn't really care, as it's not actually used
+ * for any interrupt handling anyway.
+@@ -1858,7 +1871,7 @@ static struct sysdev_class ioapic_sysdev
+ static int __init ioapic_init_sysfs(void)
+ {
+ struct sys_device * dev;
+- int i, size, error = 0;
++ int i, size, error;
+
+ error = sysdev_class_register(&ioapic_sysdev_class);
+ if (error)
+@@ -1867,12 +1880,11 @@ static int __init ioapic_init_sysfs(void
+ for (i = 0; i < nr_ioapics; i++ ) {
+ size = sizeof(struct sys_device) + nr_ioapic_registers[i]
+ * sizeof(struct IO_APIC_route_entry);
+- mp_ioapic_data[i] = kmalloc(size, GFP_KERNEL);
++ mp_ioapic_data[i] = kzalloc(size, GFP_KERNEL);
+ if (!mp_ioapic_data[i]) {
+ printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i);
+ continue;
+ }
+- memset(mp_ioapic_data[i], 0, size);
+ dev = &mp_ioapic_data[i]->dev;
+ dev->id = i;
+ dev->cls = &ioapic_sysdev_class;
+@@ -1933,7 +1945,7 @@ void destroy_irq(unsigned int irq)
+ #endif /* CONFIG_XEN */
+
+ /*
+- * MSI mesage composition
++ * MSI message composition
+ */
+ #if defined(CONFIG_PCI_MSI) && !defined(CONFIG_XEN)
+ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
+@@ -2043,8 +2055,64 @@ void arch_teardown_msi_irq(unsigned int
+ destroy_irq(irq);
+ }
+
+-#endif /* CONFIG_PCI_MSI */
++#ifdef CONFIG_DMAR
++#ifdef CONFIG_SMP
++static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
++{
++ struct irq_cfg *cfg = irq_cfg + irq;
++ struct msi_msg msg;
++ unsigned int dest;
++ cpumask_t tmp;
++
++ cpus_and(tmp, mask, cpu_online_map);
++ if (cpus_empty(tmp))
++ return;
++
++ if (assign_irq_vector(irq, mask))
++ return;
++
++ cpus_and(tmp, cfg->domain, mask);
++ dest = cpu_mask_to_apicid(tmp);
++
++ dmar_msi_read(irq, &msg);
++
++ msg.data &= ~MSI_DATA_VECTOR_MASK;
++ msg.data |= MSI_DATA_VECTOR(cfg->vector);
++ msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
++ msg.address_lo |= MSI_ADDR_DEST_ID(dest);
++
++ dmar_msi_write(irq, &msg);
++ irq_desc[irq].affinity = mask;
++}
++#endif /* CONFIG_SMP */
++
++struct irq_chip dmar_msi_type = {
++ .name = "DMAR_MSI",
++ .unmask = dmar_msi_unmask,
++ .mask = dmar_msi_mask,
++ .ack = ack_apic_edge,
++#ifdef CONFIG_SMP
++ .set_affinity = dmar_msi_set_affinity,
++#endif
++ .retrigger = ioapic_retrigger_irq,
++};
++
++int arch_setup_dmar_msi(unsigned int irq)
++{
++ int ret;
++ struct msi_msg msg;
++
++ ret = msi_compose_msg(NULL, irq, &msg);
++ if (ret < 0)
++ return ret;
++ dmar_msi_write(irq, &msg);
++ set_irq_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq,
++ "edge");
++ return 0;
++}
++#endif
+
++#endif /* CONFIG_PCI_MSI */
+ /*
+ * Hypertransport interrupt support
+ */
+@@ -2177,8 +2245,27 @@ int io_apic_set_pci_routing (int ioapic,
+ return 0;
+ }
+
+-#endif /* CONFIG_ACPI */
+
++int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
++{
++ int i;
++
++ if (skip_ioapic_setup)
++ return -1;
++
++ for (i = 0; i < mp_irq_entries; i++)
++ if (mp_irqs[i].mpc_irqtype == mp_INT &&
++ mp_irqs[i].mpc_srcbusirq == bus_irq)
++ break;
++ if (i >= mp_irq_entries)
++ return -1;
++
++ *trigger = irq_trigger(i);
++ *polarity = irq_polarity(i);
++ return 0;
++}
++
++#endif /* CONFIG_ACPI */
+
+ #ifndef CONFIG_XEN
+ /*
+@@ -2217,3 +2304,4 @@ void __init setup_ioapic_dest(void)
+ }
+ #endif
+ #endif /* !CONFIG_XEN */
++
+Index: head-2008-12-01/arch/x86/kernel/ioport_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ioport_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ioport_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/i386/kernel/ioport.c
+- *
+ * This contains the io-permission bitmap code - written by obz, with changes
+ * by Linus.
+ */
+Index: head-2008-12-01/arch/x86/kernel/ioport_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ioport_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ioport_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/x86_64/kernel/ioport.c
+- *
+ * This contains the io-permission bitmap code - written by obz, with changes
+ * by Linus.
+ */
+Index: head-2008-12-01/arch/x86/kernel/irq_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/i386/kernel/irq.c
+- *
+ * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ *
+ * This file contains the lowest level x86-specific interrupt
+@@ -231,8 +229,6 @@ asmlinkage void do_softirq(void)
+
+ local_irq_restore(flags);
+ }
+-
+-EXPORT_SYMBOL(do_softirq);
+ #endif
+
+ /*
+@@ -259,9 +255,17 @@ int show_interrupts(struct seq_file *p,
+ }
+
+ if (i < NR_IRQS) {
++ unsigned any_count = 0;
++
+ spin_lock_irqsave(&irq_desc[i].lock, flags);
++#ifndef CONFIG_SMP
++ any_count = kstat_irqs(i);
++#else
++ for_each_online_cpu(j)
++ any_count |= kstat_cpu(j).irqs[i];
++#endif
+ action = irq_desc[i].action;
+- if (!action)
++ if (!action && !any_count)
+ goto skip;
+ seq_printf(p, "%3d: ",i);
+ #ifndef CONFIG_SMP
+@@ -272,10 +276,12 @@ int show_interrupts(struct seq_file *p,
+ #endif
+ seq_printf(p, " %8s", irq_desc[i].chip->name);
+ seq_printf(p, "-%-8s", irq_desc[i].name);
+- seq_printf(p, " %s", action->name);
+
+- for (action=action->next; action; action = action->next)
+- seq_printf(p, ", %s", action->name);
++ if (action) {
++ seq_printf(p, " %s", action->name);
++ while ((action = action->next) != NULL)
++ seq_printf(p, ", %s", action->name);
++ }
+
+ seq_putc(p, '\n');
+ skip:
+@@ -284,13 +290,46 @@ skip:
+ seq_printf(p, "NMI: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", nmi_count(j));
+- seq_putc(p, '\n');
++ seq_printf(p, " Non-maskable interrupts\n");
+ #ifdef CONFIG_X86_LOCAL_APIC
+ seq_printf(p, "LOC: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ",
+ per_cpu(irq_stat,j).apic_timer_irqs);
+- seq_putc(p, '\n');
++ seq_printf(p, " Local timer interrupts\n");
++#endif
++#ifdef CONFIG_SMP
++ seq_printf(p, "RES: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ",
++ per_cpu(irq_stat,j).irq_resched_count);
++ seq_printf(p, " Rescheduling interrupts\n");
++ seq_printf(p, "CAL: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ",
++ per_cpu(irq_stat,j).irq_call_count);
++ seq_printf(p, " function call interrupts\n");
++#ifndef CONFIG_XEN
++ seq_printf(p, "TLB: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ",
++ per_cpu(irq_stat,j).irq_tlb_count);
++ seq_printf(p, " TLB shootdowns\n");
++#endif
++#endif
++#ifdef CONFIG_X86_MCE
++ seq_printf(p, "TRM: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ",
++ per_cpu(irq_stat,j).irq_thermal_count);
++ seq_printf(p, " Thermal event interrupts\n");
++#endif
++#ifdef CONFIG_X86_LOCAL_APIC
++ seq_printf(p, "SPU: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ",
++ per_cpu(irq_stat,j).irq_spurious_count);
++ seq_printf(p, " Spurious interrupts\n");
+ #endif
+ seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
+ #if defined(CONFIG_X86_IO_APIC)
+Index: head-2008-12-01/arch/x86/kernel/irq_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_64-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/x86_64/kernel/irq.c
+- *
+ * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ *
+ * This file contains the lowest level x86_64-specific interrupt
+@@ -64,9 +62,17 @@ int show_interrupts(struct seq_file *p,
+ }
+
+ if (i < NR_IRQS) {
++ unsigned any_count = 0;
++
+ spin_lock_irqsave(&irq_desc[i].lock, flags);
++#ifndef CONFIG_SMP
++ any_count = kstat_irqs(i);
++#else
++ for_each_online_cpu(j)
++ any_count |= kstat_cpu(j).irqs[i];
++#endif
+ action = irq_desc[i].action;
+- if (!action)
++ if (!action && !any_count)
+ goto skip;
+ seq_printf(p, "%3d: ",i);
+ #ifndef CONFIG_SMP
+@@ -78,9 +84,11 @@ int show_interrupts(struct seq_file *p,
+ seq_printf(p, " %8s", irq_desc[i].chip->name);
+ seq_printf(p, "-%-8s", irq_desc[i].name);
+
+- seq_printf(p, " %s", action->name);
+- for (action=action->next; action; action = action->next)
+- seq_printf(p, ", %s", action->name);
++ if (action) {
++ seq_printf(p, " %s", action->name);
++ while ((action = action->next) != NULL)
++ seq_printf(p, ", %s", action->name);
++ }
+ seq_putc(p, '\n');
+ skip:
+ spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+@@ -88,12 +96,44 @@ skip:
+ seq_printf(p, "NMI: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", cpu_pda(j)->__nmi_count);
+- seq_putc(p, '\n');
++ seq_printf(p, " Non-maskable interrupts\n");
+ #ifdef CONFIG_X86_LOCAL_APIC
+ seq_printf(p, "LOC: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", cpu_pda(j)->apic_timer_irqs);
+- seq_putc(p, '\n');
++ seq_printf(p, " Local timer interrupts\n");
++#endif
++#ifdef CONFIG_SMP
++ seq_printf(p, "RES: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", cpu_pda(j)->irq_resched_count);
++ seq_printf(p, " Rescheduling interrupts\n");
++ seq_printf(p, "CAL: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", cpu_pda(j)->irq_call_count);
++ seq_printf(p, " function call interrupts\n");
++#ifndef CONFIG_XEN
++ seq_printf(p, "TLB: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", cpu_pda(j)->irq_tlb_count);
++ seq_printf(p, " TLB shootdowns\n");
++#endif
++#endif
++#ifdef CONFIG_X86_MCE
++ seq_printf(p, "TRM: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", cpu_pda(j)->irq_thermal_count);
++ seq_printf(p, " Thermal event interrupts\n");
++ seq_printf(p, "THR: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", cpu_pda(j)->irq_threshold_count);
++ seq_printf(p, " Threshold APIC interrupts\n");
++#endif
++#ifdef CONFIG_X86_LOCAL_APIC
++ seq_printf(p, "SPU: ");
++ for_each_online_cpu(j)
++ seq_printf(p, "%10u ", cpu_pda(j)->irq_spurious_count);
++ seq_printf(p, " Spurious interrupts\n");
+ #endif
+ seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
+ }
+@@ -211,7 +251,6 @@ asmlinkage void do_softirq(void)
+ }
+ local_irq_restore(flags);
+ }
+-EXPORT_SYMBOL(do_softirq);
+
+ #ifndef CONFIG_X86_LOCAL_APIC
+ /*
+Index: head-2008-12-01/arch/x86/kernel/ldt_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ldt_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ldt_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/i386/kernel/ldt.c
+- *
+ * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
+ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
+ */
+@@ -106,14 +104,14 @@ int init_new_context(struct task_struct
+ struct mm_struct * old_mm;
+ int retval = 0;
+
+- init_MUTEX(&mm->context.sem);
++ mutex_init(&mm->context.lock);
+ mm->context.size = 0;
+ mm->context.has_foreign_mappings = 0;
+ old_mm = current->mm;
+ if (old_mm && old_mm->context.size > 0) {
+- down(&old_mm->context.sem);
++ mutex_lock(&old_mm->context.lock);
+ retval = copy_ldt(&mm->context, &old_mm->context);
+- up(&old_mm->context.sem);
++ mutex_unlock(&old_mm->context.lock);
+ }
+ return retval;
+ }
+@@ -149,7 +147,7 @@ static int read_ldt(void __user * ptr, u
+ if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
+ bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
+
+- down(&mm->context.sem);
++ mutex_lock(&mm->context.lock);
+ size = mm->context.size*LDT_ENTRY_SIZE;
+ if (size > bytecount)
+ size = bytecount;
+@@ -157,7 +155,7 @@ static int read_ldt(void __user * ptr, u
+ err = 0;
+ if (copy_to_user(ptr, mm->context.ldt, size))
+ err = -EFAULT;
+- up(&mm->context.sem);
++ mutex_unlock(&mm->context.lock);
+ if (err < 0)
+ goto error_return;
+ if (size != bytecount) {
+@@ -213,7 +211,7 @@ static int write_ldt(void __user * ptr,
+ goto out;
+ }
+
+- down(&mm->context.sem);
++ mutex_lock(&mm->context.lock);
+ if (ldt_info.entry_number >= mm->context.size) {
+ error = alloc_ldt(¤t->mm->context, ldt_info.entry_number+1, 1);
+ if (error < 0)
+@@ -240,7 +238,7 @@ install:
+ entry_1, entry_2);
+
+ out_unlock:
+- up(&mm->context.sem);
++ mutex_unlock(&mm->context.lock);
+ out:
+ return error;
+ }
+Index: head-2008-12-01/arch/x86/kernel/ldt_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ldt_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ldt_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/x86_64/kernel/ldt.c
+- *
+ * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
+ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
+ * Copyright (C) 2002 Andi Kleen
+@@ -112,19 +110,14 @@ int init_new_context(struct task_struct
+ int retval = 0;
+
+ memset(&mm->context, 0, sizeof(mm->context));
+- init_MUTEX(&mm->context.sem);
++ mutex_init(&mm->context.lock);
+ old_mm = current->mm;
+ if (old_mm)
+ mm->context.vdso = old_mm->context.vdso;
+ if (old_mm && old_mm->context.size > 0) {
+- down(&old_mm->context.sem);
++ mutex_lock(&old_mm->context.lock);
+ retval = copy_ldt(&mm->context, &old_mm->context);
+- up(&old_mm->context.sem);
+- }
+- if (retval == 0) {
+- spin_lock(&mm_unpinned_lock);
+- list_add(&mm->context.unpinned, &mm_unpinned);
+- spin_unlock(&mm_unpinned_lock);
++ mutex_unlock(&old_mm->context.lock);
+ }
+ return retval;
+ }
+@@ -148,11 +141,6 @@ void destroy_context(struct mm_struct *m
+ kfree(mm->context.ldt);
+ mm->context.size = 0;
+ }
+- if (!PagePinned(virt_to_page(mm->pgd))) {
+- spin_lock(&mm_unpinned_lock);
+- list_del(&mm->context.unpinned);
+- spin_unlock(&mm_unpinned_lock);
+- }
+ }
+
+ static int read_ldt(void __user * ptr, unsigned long bytecount)
+@@ -166,7 +154,7 @@ static int read_ldt(void __user * ptr, u
+ if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
+ bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
+
+- down(&mm->context.sem);
++ mutex_lock(&mm->context.lock);
+ size = mm->context.size*LDT_ENTRY_SIZE;
+ if (size > bytecount)
+ size = bytecount;
+@@ -174,7 +162,7 @@ static int read_ldt(void __user * ptr, u
+ err = 0;
+ if (copy_to_user(ptr, mm->context.ldt, size))
+ err = -EFAULT;
+- up(&mm->context.sem);
++ mutex_unlock(&mm->context.lock);
+ if (err < 0)
+ goto error_return;
+ if (size != bytecount) {
+@@ -227,7 +215,7 @@ static int write_ldt(void __user * ptr,
+ goto out;
+ }
+
+- down(&mm->context.sem);
++ mutex_lock(&mm->context.lock);
+ if (ldt_info.entry_number >= (unsigned)mm->context.size) {
+ error = alloc_ldt(¤t->mm->context, ldt_info.entry_number+1, 1);
+ if (error < 0)
+@@ -256,7 +244,7 @@ install:
+ error = HYPERVISOR_update_descriptor(mach_lp, (unsigned long)((entry_1 | (unsigned long) entry_2 << 32)));
+
+ out_unlock:
+- up(&mm->context.sem);
++ mutex_unlock(&mm->context.lock);
+ out:
+ return error;
+ }
+Index: head-2008-12-01/arch/x86/kernel/mpparse_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/mpparse_32-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/mpparse_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1023,7 +1023,7 @@ void __init mp_config_acpi_legacy_irqs (
+
+ /*
+ * Use the default configuration for the IRQs 0-15. Unless
+- * overriden by (MADT) interrupt source override entries.
++ * overridden by (MADT) interrupt source override entries.
+ */
+ for (i = 0; i < 16; i++) {
+ int idx;
+Index: head-2008-12-01/arch/x86/kernel/mpparse_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/mpparse_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/mpparse_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -57,6 +57,8 @@ unsigned long mp_lapic_addr = 0;
+
+ /* Processor that is doing the boot up */
+ unsigned int boot_cpu_id = -1U;
++EXPORT_SYMBOL(boot_cpu_id);
++
+ /* Internal processor count */
+ unsigned int num_processors __cpuinitdata = 0;
+
+@@ -87,7 +89,7 @@ static int __init mpf_checksum(unsigned
+ }
+
+ #ifndef CONFIG_XEN
+-static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
++static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
+ {
+ int cpu;
+ cpumask_t tmp_map;
+@@ -124,13 +126,24 @@ static void __cpuinit MP_processor_info
+ cpu = 0;
+ }
+ bios_cpu_apicid[cpu] = m->mpc_apicid;
+- x86_cpu_to_apicid[cpu] = m->mpc_apicid;
++ /*
++ * We get called early in the the start_kernel initialization
++ * process when the per_cpu data area is not yet setup, so we
++ * use a static array that is removed after the per_cpu data
++ * area is created.
++ */
++ if (x86_cpu_to_apicid_ptr) {
++ u8 *x86_cpu_to_apicid = (u8 *)x86_cpu_to_apicid_ptr;
++ x86_cpu_to_apicid[cpu] = m->mpc_apicid;
++ } else {
++ per_cpu(x86_cpu_to_apicid, cpu) = m->mpc_apicid;
++ }
+
+ cpu_set(cpu, cpu_possible_map);
+ cpu_set(cpu, cpu_present_map);
+ }
+ #else
+-static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
++static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
+ {
+ num_processors++;
+ }
+Index: head-2008-12-01/arch/x86/kernel/pci-dma-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -13,14 +13,13 @@
+ #include <linux/pci.h>
+ #include <linux/module.h>
+ #include <linux/version.h>
+-#include <linux/pci.h>
+ #include <asm/io.h>
+ #include <xen/balloon.h>
+ #include <xen/gnttab.h>
+ #include <asm/swiotlb.h>
+ #include <asm/tlbflush.h>
+-#include <asm-i386/mach-xen/asm/swiotlb.h>
+-#include <asm-i386/mach-xen/asm/gnttab_dma.h>
++#include <asm/swiotlb_32.h>
++#include <asm/gnttab_dma.h>
+ #include <asm/bug.h>
+
+ #ifdef __x86_64__
+@@ -106,27 +105,29 @@ int range_straddles_page_boundary(paddr_
+ }
+
+ int
+-dma_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
++dma_map_sg(struct device *hwdev, struct scatterlist *sgl, int nents,
+ enum dma_data_direction direction)
+ {
+ int i, rc;
+
+ BUG_ON(!valid_dma_direction(direction));
+- WARN_ON(nents == 0 || sg[0].length == 0);
++ WARN_ON(nents == 0 || sgl->length == 0);
+
+ if (swiotlb) {
+- rc = swiotlb_map_sg(hwdev, sg, nents, direction);
++ rc = swiotlb_map_sg(hwdev, sgl, nents, direction);
+ } else {
+- for (i = 0; i < nents; i++ ) {
+- BUG_ON(!sg[i].page);
+- sg[i].dma_address =
+- gnttab_dma_map_page(sg[i].page) + sg[i].offset;
+- sg[i].dma_length = sg[i].length;
++ struct scatterlist *sg;
++
++ for_each_sg(sgl, sg, nents, i) {
++ BUG_ON(!sg_page(sg));
++ sg->dma_address =
++ gnttab_dma_map_page(sg_page(sg)) + sg->offset;
++ sg->dma_length = sg->length;
+ IOMMU_BUG_ON(address_needs_mapping(
+- hwdev, sg[i].dma_address));
++ hwdev, sg->dma_address));
+ IOMMU_BUG_ON(range_straddles_page_boundary(
+- page_to_pseudophys(sg[i].page) + sg[i].offset,
+- sg[i].length));
++ page_to_pseudophys(sg_page(sg)) + sg->offset,
++ sg->length));
+ }
+ rc = nents;
+ }
+@@ -137,17 +138,19 @@ dma_map_sg(struct device *hwdev, struct
+ EXPORT_SYMBOL(dma_map_sg);
+
+ void
+-dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
++dma_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nents,
+ enum dma_data_direction direction)
+ {
+ int i;
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (swiotlb)
+- swiotlb_unmap_sg(hwdev, sg, nents, direction);
++ swiotlb_unmap_sg(hwdev, sgl, nents, direction);
+ else {
+- for (i = 0; i < nents; i++ )
+- gnttab_dma_unmap_page(sg[i].dma_address);
++ struct scatterlist *sg;
++
++ for_each_sg(sgl, sg, nents, i)
++ gnttab_dma_unmap_page(sg->dma_address);
+ }
+ }
+ EXPORT_SYMBOL(dma_unmap_sg);
+@@ -261,7 +264,8 @@ void dma_free_coherent(struct device *de
+ {
+ struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
+ int order = get_order(size);
+-
++
++ WARN_ON(irqs_disabled()); /* for portability */
+ if (mem && vaddr >= mem->virt_base && vaddr < (mem->virt_base + (mem->size << PAGE_SHIFT))) {
+ int page = (vaddr - mem->virt_base) >> PAGE_SHIFT;
+
+Index: head-2008-12-01/arch/x86/kernel/process_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/i386/kernel/process.c
+- *
+ * Copyright (C) 1995 Linus Torvalds
+ *
+ * Pentium III FXSR, SSE support
+@@ -190,6 +188,10 @@ void cpu_idle(void)
+ }
+ }
+
++static void do_nothing(void *unused)
++{
++}
++
+ void cpu_idle_wait(void)
+ {
+ unsigned int cpu, this_cpu = get_cpu();
+@@ -214,13 +216,20 @@ void cpu_idle_wait(void)
+ cpu_clear(cpu, map);
+ }
+ cpus_and(map, map, cpu_online_map);
++ /*
++ * We waited 1 sec, if a CPU still did not call idle
++ * it may be because it is in idle and not waking up
++ * because it has nothing to do.
++ * Give all the remaining CPUS a kick.
++ */
++ smp_call_function_mask(map, do_nothing, 0, 0);
+ } while (!cpus_empty(map));
+
+ set_cpus_allowed(current, tmp);
+ }
+ EXPORT_SYMBOL_GPL(cpu_idle_wait);
+
+-void __devinit select_idle_routine(const struct cpuinfo_x86 *c)
++void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
+ {
+ }
+
+@@ -238,34 +247,52 @@ static int __init idle_setup(char *str)
+ }
+ early_param("idle", idle_setup);
+
+-void show_regs(struct pt_regs * regs)
++void __show_registers(struct pt_regs *regs, int all)
+ {
+ unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
+ unsigned long d0, d1, d2, d3, d6, d7;
++ unsigned long esp;
++ unsigned short ss, gs;
++
++ if (user_mode_vm(regs)) {
++ esp = regs->esp;
++ ss = regs->xss & 0xffff;
++ savesegment(gs, gs);
++ } else {
++ esp = (unsigned long) (®s->esp);
++ savesegment(ss, ss);
++ savesegment(gs, gs);
++ }
+
+ printk("\n");
+- printk("Pid: %d, comm: %20s\n", current->pid, current->comm);
+- printk("EIP: %04x:[<%08lx>] CPU: %d\n",0xffff & regs->xcs,regs->eip, smp_processor_id());
++ printk("Pid: %d, comm: %s %s (%s %.*s)\n",
++ task_pid_nr(current), current->comm,
++ print_tainted(), init_utsname()->release,
++ (int)strcspn(init_utsname()->version, " "),
++ init_utsname()->version);
++
++ printk("EIP: %04x:[<%08lx>] EFLAGS: %08lx CPU: %d\n",
++ 0xffff & regs->xcs, regs->eip, regs->eflags,
++ smp_processor_id());
+ print_symbol("EIP is at %s\n", regs->eip);
+
+- if (user_mode_vm(regs))
+- printk(" ESP: %04x:%08lx",0xffff & regs->xss,regs->esp);
+- printk(" EFLAGS: %08lx %s (%s %.*s)\n",
+- regs->eflags, print_tainted(), init_utsname()->release,
+- (int)strcspn(init_utsname()->version, " "),
+- init_utsname()->version);
+ printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
+- regs->eax,regs->ebx,regs->ecx,regs->edx);
+- printk("ESI: %08lx EDI: %08lx EBP: %08lx",
+- regs->esi, regs->edi, regs->ebp);
+- printk(" DS: %04x ES: %04x FS: %04x\n",
+- 0xffff & regs->xds,0xffff & regs->xes, 0xffff & regs->xfs);
++ regs->eax, regs->ebx, regs->ecx, regs->edx);
++ printk("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n",
++ regs->esi, regs->edi, regs->ebp, esp);
++ printk(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n",
++ regs->xds & 0xffff, regs->xes & 0xffff,
++ regs->xfs & 0xffff, gs, ss);
++
++ if (!all)
++ return;
+
+ cr0 = read_cr0();
+ cr2 = read_cr2();
+ cr3 = read_cr3();
+ cr4 = read_cr4_safe();
+- printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n", cr0, cr2, cr3, cr4);
++ printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n",
++ cr0, cr2, cr3, cr4);
+
+ get_debugreg(d0, 0);
+ get_debugreg(d1, 1);
+@@ -273,10 +300,16 @@ void show_regs(struct pt_regs * regs)
+ get_debugreg(d3, 3);
+ printk("DR0: %08lx DR1: %08lx DR2: %08lx DR3: %08lx\n",
+ d0, d1, d2, d3);
++
+ get_debugreg(d6, 6);
+ get_debugreg(d7, 7);
+- printk("DR6: %08lx DR7: %08lx\n", d6, d7);
++ printk("DR6: %08lx DR7: %08lx\n",
++ d6, d7);
++}
+
++void show_regs(struct pt_regs *regs)
++{
++ __show_registers(regs, 1);
+ show_trace(NULL, regs, ®s->esp);
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/process_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/x86-64/kernel/process.c
+- *
+ * Copyright (C) 1995 Linus Torvalds
+ *
+ * Pentium III FXSR, SSE support
+@@ -41,6 +39,7 @@
+ #include <linux/notifier.h>
+ #include <linux/kprobes.h>
+ #include <linux/kdebug.h>
++#include <linux/tick.h>
+
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -172,6 +171,9 @@ void cpu_idle (void)
+
+ if (__get_cpu_var(cpu_idle_state))
+ __get_cpu_var(cpu_idle_state) = 0;
++
++ tick_nohz_stop_sched_tick();
++
+ rmb();
+ idle = xen_idle; /* no alternatives */
+ if (cpu_is_offline(smp_processor_id()))
+@@ -190,12 +192,17 @@ void cpu_idle (void)
+ __exit_idle();
+ }
+
++ tick_nohz_restart_sched_tick();
+ preempt_enable_no_resched();
+ schedule();
+ preempt_disable();
+ }
+ }
+
++static void do_nothing(void *unused)
++{
++}
++
+ void cpu_idle_wait(void)
+ {
+ unsigned int cpu, this_cpu = get_cpu();
+@@ -221,6 +228,13 @@ void cpu_idle_wait(void)
+ cpu_clear(cpu, map);
+ }
+ cpus_and(map, map, cpu_online_map);
++ /*
++ * We waited 1 sec, if a CPU still did not call idle
++ * it may be because it is in idle and not waking up
++ * because it has nothing to do.
++ * Give all the remaining CPUS a kick.
++ */
++ smp_call_function_mask(map, do_nothing, 0, 0);
+ } while (!cpus_empty(map));
+
+ set_cpus_allowed(current, tmp);
+@@ -528,7 +542,7 @@ static inline void __switch_to_xtra(stru
+ *
+ * Kprobes not supported here. Set the probe on schedule instead.
+ */
+-__kprobes struct task_struct *
++struct task_struct *
+ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
+ {
+ struct thread_struct *prev = &prev_p->thread,
+Index: head-2008-12-01/arch/x86/kernel/quirks-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/quirks-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/quirks-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -41,7 +41,353 @@ static void __devinit quirk_intel_irqbal
+ if (!(config & 0x2))
+ pci_write_config_byte(dev, 0xf4, config);
+ }
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_intel_irqbalance);
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_intel_irqbalance);
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH,
++ quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH,
++ quirk_intel_irqbalance);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH,
++ quirk_intel_irqbalance);
++#endif
++
++#if defined(CONFIG_HPET_TIMER)
++#include <asm/hpet.h>
++
++unsigned long force_hpet_address;
++
++static enum {
++ NONE_FORCE_HPET_RESUME,
++ OLD_ICH_FORCE_HPET_RESUME,
++ ICH_FORCE_HPET_RESUME,
++ VT8237_FORCE_HPET_RESUME,
++ NVIDIA_FORCE_HPET_RESUME,
++} force_hpet_resume_type;
++
++static void __iomem *rcba_base;
++
++static void ich_force_hpet_resume(void)
++{
++ u32 val;
++
++ if (!force_hpet_address)
++ return;
++
++ if (rcba_base == NULL)
++ BUG();
++
++ /* read the Function Disable register, dword mode only */
++ val = readl(rcba_base + 0x3404);
++ if (!(val & 0x80)) {
++ /* HPET disabled in HPTC. Trying to enable */
++ writel(val | 0x80, rcba_base + 0x3404);
++ }
++
++ val = readl(rcba_base + 0x3404);
++ if (!(val & 0x80))
++ BUG();
++ else
++ printk(KERN_DEBUG "Force enabled HPET at resume\n");
++
++ return;
++}
++
++static void ich_force_enable_hpet(struct pci_dev *dev)
++{
++ u32 val;
++ u32 uninitialized_var(rcba);
++ int err = 0;
++
++ if (hpet_address || force_hpet_address)
++ return;
++
++ pci_read_config_dword(dev, 0xF0, &rcba);
++ rcba &= 0xFFFFC000;
++ if (rcba == 0) {
++ printk(KERN_DEBUG "RCBA disabled. Cannot force enable HPET\n");
++ return;
++ }
++
++ /* use bits 31:14, 16 kB aligned */
++ rcba_base = ioremap_nocache(rcba, 0x4000);
++ if (rcba_base == NULL) {
++ printk(KERN_DEBUG "ioremap failed. Cannot force enable HPET\n");
++ return;
++ }
++
++ /* read the Function Disable register, dword mode only */
++ val = readl(rcba_base + 0x3404);
++
++ if (val & 0x80) {
++ /* HPET is enabled in HPTC. Just not reported by BIOS */
++ val = val & 0x3;
++ force_hpet_address = 0xFED00000 | (val << 12);
++ printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
++ force_hpet_address);
++ iounmap(rcba_base);
++ return;
++ }
++
++ /* HPET disabled in HPTC. Trying to enable */
++ writel(val | 0x80, rcba_base + 0x3404);
++
++ val = readl(rcba_base + 0x3404);
++ if (!(val & 0x80)) {
++ err = 1;
++ } else {
++ val = val & 0x3;
++ force_hpet_address = 0xFED00000 | (val << 12);
++ }
++
++ if (err) {
++ force_hpet_address = 0;
++ iounmap(rcba_base);
++ printk(KERN_DEBUG "Failed to force enable HPET\n");
++ } else {
++ force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
++ printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
++ force_hpet_address);
++ }
++}
++
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
++ ich_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
++ ich_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
++ ich_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1,
++ ich_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
++ ich_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
++ ich_force_enable_hpet);
++
++
++static struct pci_dev *cached_dev;
++
++static void old_ich_force_hpet_resume(void)
++{
++ u32 val;
++ u32 uninitialized_var(gen_cntl);
++
++ if (!force_hpet_address || !cached_dev)
++ return;
++
++ pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
++ gen_cntl &= (~(0x7 << 15));
++ gen_cntl |= (0x4 << 15);
++
++ pci_write_config_dword(cached_dev, 0xD0, gen_cntl);
++ pci_read_config_dword(cached_dev, 0xD0, &gen_cntl);
++ val = gen_cntl >> 15;
++ val &= 0x7;
++ if (val == 0x4)
++ printk(KERN_DEBUG "Force enabled HPET at resume\n");
++ else
++ BUG();
++}
++
++static void old_ich_force_enable_hpet(struct pci_dev *dev)
++{
++ u32 val;
++ u32 uninitialized_var(gen_cntl);
++
++ if (hpet_address || force_hpet_address)
++ return;
++
++ pci_read_config_dword(dev, 0xD0, &gen_cntl);
++ /*
++ * Bit 17 is HPET enable bit.
++ * Bit 16:15 control the HPET base address.
++ */
++ val = gen_cntl >> 15;
++ val &= 0x7;
++ if (val & 0x4) {
++ val &= 0x3;
++ force_hpet_address = 0xFED00000 | (val << 12);
++ printk(KERN_DEBUG "HPET at base address 0x%lx\n",
++ force_hpet_address);
++ return;
++ }
++
++ /*
++ * HPET is disabled. Trying enabling at FED00000 and check
++ * whether it sticks
++ */
++ gen_cntl &= (~(0x7 << 15));
++ gen_cntl |= (0x4 << 15);
++ pci_write_config_dword(dev, 0xD0, gen_cntl);
++
++ pci_read_config_dword(dev, 0xD0, &gen_cntl);
++
++ val = gen_cntl >> 15;
++ val &= 0x7;
++ if (val & 0x4) {
++ /* HPET is enabled in HPTC. Just not reported by BIOS */
++ val &= 0x3;
++ force_hpet_address = 0xFED00000 | (val << 12);
++ printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
++ force_hpet_address);
++ cached_dev = dev;
++ force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
++ return;
++ }
++
++ printk(KERN_DEBUG "Failed to force enable HPET\n");
++}
++
++/*
++ * Undocumented chipset features. Make sure that the user enforced
++ * this.
++ */
++static void old_ich_force_enable_hpet_user(struct pci_dev *dev)
++{
++ if (hpet_force_user)
++ old_ich_force_enable_hpet(dev);
++}
++
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
++ old_ich_force_enable_hpet_user);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
++ old_ich_force_enable_hpet_user);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
++ old_ich_force_enable_hpet_user);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12,
++ old_ich_force_enable_hpet_user);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
++ old_ich_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_12,
++ old_ich_force_enable_hpet);
++
++
++static void vt8237_force_hpet_resume(void)
++{
++ u32 val;
++
++ if (!force_hpet_address || !cached_dev)
++ return;
++
++ val = 0xfed00000 | 0x80;
++ pci_write_config_dword(cached_dev, 0x68, val);
++
++ pci_read_config_dword(cached_dev, 0x68, &val);
++ if (val & 0x80)
++ printk(KERN_DEBUG "Force enabled HPET at resume\n");
++ else
++ BUG();
++}
++
++static void vt8237_force_enable_hpet(struct pci_dev *dev)
++{
++ u32 uninitialized_var(val);
++
++ if (!hpet_force_user || hpet_address || force_hpet_address)
++ return;
++
++ pci_read_config_dword(dev, 0x68, &val);
++ /*
++ * Bit 7 is HPET enable bit.
++ * Bit 31:10 is HPET base address (contrary to what datasheet claims)
++ */
++ if (val & 0x80) {
++ force_hpet_address = (val & ~0x3ff);
++ printk(KERN_DEBUG "HPET at base address 0x%lx\n",
++ force_hpet_address);
++ return;
++ }
++
++ /*
++ * HPET is disabled. Trying enabling at FED00000 and check
++ * whether it sticks
++ */
++ val = 0xfed00000 | 0x80;
++ pci_write_config_dword(dev, 0x68, val);
++
++ pci_read_config_dword(dev, 0x68, &val);
++ if (val & 0x80) {
++ force_hpet_address = (val & ~0x3ff);
++ printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
++ force_hpet_address);
++ cached_dev = dev;
++ force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
++ return;
++ }
++
++ printk(KERN_DEBUG "Failed to force enable HPET\n");
++}
++
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
++ vt8237_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
++ vt8237_force_enable_hpet);
++
++/*
++ * Undocumented chipset feature taken from LinuxBIOS.
++ */
++static void nvidia_force_hpet_resume(void)
++{
++ pci_write_config_dword(cached_dev, 0x44, 0xfed00001);
++ printk(KERN_DEBUG "Force enabled HPET at resume\n");
++}
++
++static void nvidia_force_enable_hpet(struct pci_dev *dev)
++{
++ u32 uninitialized_var(val);
++
++ if (!hpet_force_user || hpet_address || force_hpet_address)
++ return;
++
++ pci_write_config_dword(dev, 0x44, 0xfed00001);
++ pci_read_config_dword(dev, 0x44, &val);
++ force_hpet_address = val & 0xfffffffe;
++ force_hpet_resume_type = NVIDIA_FORCE_HPET_RESUME;
++ printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
++ force_hpet_address);
++ cached_dev = dev;
++ return;
++}
++
++/* ISA Bridges */
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0050,
++ nvidia_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0051,
++ nvidia_force_enable_hpet);
++
++/* LPC bridges */
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0360,
++ nvidia_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0361,
++ nvidia_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0362,
++ nvidia_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0363,
++ nvidia_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0364,
++ nvidia_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0365,
++ nvidia_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0366,
++ nvidia_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0367,
++ nvidia_force_enable_hpet);
++
++void force_hpet_resume(void)
++{
++ switch (force_hpet_resume_type) {
++ case ICH_FORCE_HPET_RESUME:
++ return ich_force_hpet_resume();
++
++ case OLD_ICH_FORCE_HPET_RESUME:
++ return old_ich_force_hpet_resume();
++
++ case VT8237_FORCE_HPET_RESUME:
++ return vt8237_force_hpet_resume();
++
++ case NVIDIA_FORCE_HPET_RESUME:
++ return nvidia_force_hpet_resume();
++
++ default:
++ break;
++ }
++}
++
+ #endif
+Index: head-2008-12-01/arch/x86/kernel/setup64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -15,7 +15,6 @@
+ #include <linux/bootmem.h>
+ #include <linux/bitops.h>
+ #include <linux/module.h>
+-#include <asm/bootsetup.h>
+ #include <asm/pda.h>
+ #include <asm/pgtable.h>
+ #include <asm/processor.h>
+@@ -27,11 +26,12 @@
+ #include <asm/percpu.h>
+ #include <asm/proto.h>
+ #include <asm/sections.h>
++#include <asm/setup.h>
+ #ifdef CONFIG_XEN
+ #include <asm/hypervisor.h>
+ #endif
+
+-char x86_boot_params[BOOT_PARAM_SIZE] __initdata;
++struct boot_params __initdata boot_params;
+
+ cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
+
+@@ -159,8 +159,8 @@ static void switch_pt(void)
+
+ static void __cpuinit cpu_gdt_init(const struct desc_ptr *gdt_descr)
+ {
+- asm volatile("lgdt %0" :: "m" (*gdt_descr));
+- asm volatile("lidt %0" :: "m" (idt_descr));
++ load_gdt(gdt_descr);
++ load_idt(idt_descr);
+ }
+ #endif
+
+@@ -252,6 +252,14 @@ void __cpuinit check_efer(void)
+
+ unsigned long kernel_eflags;
+
++#ifndef CONFIG_X86_NO_TSS
++/*
++ * Copies of the original ist values from the tss are only accessed during
++ * debugging, no special alignment required.
++ */
++DEFINE_PER_CPU(struct orig_ist, orig_ist);
++#endif
++
+ /*
+ * cpu_init() initializes state that is per-CPU. Some data is already
+ * initialized (naturally) in the bootstrap process, such as the GDT
+Index: head-2008-12-01/arch/x86/kernel/setup_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/i386/kernel/setup.c
+- *
+ * Copyright (C) 1995 Linus Torvalds
+ *
+ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
+@@ -70,6 +68,7 @@
+ #include <xen/xencons.h>
+ #include <setup_arch.h>
+ #include <bios_ebda.h>
++#include <asm/cacheflush.h>
+
+ #ifdef CONFIG_XEN
+ #include <xen/interface/kexec.h>
+@@ -80,13 +79,14 @@ static struct notifier_block xen_panic_b
+ xen_panic_event, NULL, 0 /* try to go last */
+ };
+
+-int disable_pse __devinitdata = 0;
++int disable_pse __cpuinitdata = 0;
+
+ /*
+ * Machine setup..
+ */
+ extern struct resource code_resource;
+ extern struct resource data_resource;
++extern struct resource bss_resource;
+
+ /* cpu data as detected by the assembly code in head.S */
+ struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
+@@ -98,9 +98,6 @@ unsigned long mmu_cr4_features;
+
+ /* for MCA, but anyone else can use it if they want */
+ unsigned int machine_id;
+-#ifdef CONFIG_MCA
+-EXPORT_SYMBOL(machine_id);
+-#endif
+ unsigned int machine_submodel_id;
+ unsigned int BIOS_revision;
+ unsigned int mca_pentium_flag;
+@@ -121,7 +118,7 @@ EXPORT_SYMBOL(apm_info);
+ struct edid_info edid_info;
+ EXPORT_SYMBOL_GPL(edid_info);
+ #ifndef CONFIG_XEN
+-#define copy_edid() (edid_info = EDID_INFO)
++#define copy_edid() (edid_info = boot_params.edid_info)
+ #endif
+ struct ist_info ist_info;
+ #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
+@@ -170,10 +167,11 @@ EXPORT_SYMBOL(edd);
+ */
+ static inline void copy_edd(void)
+ {
+- memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
+- memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
+- edd.mbr_signature_nr = EDD_MBR_SIG_NR;
+- edd.edd_info_nr = EDD_NR;
++ memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
++ sizeof(edd.mbr_signature));
++ memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
++ edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
++ edd.edd_info_nr = boot_params.eddbuf_entries;
+ }
+ #endif
+ #else
+@@ -416,6 +414,53 @@ extern unsigned long __init setup_memory
+ extern void zone_sizes_init(void);
+ #endif /* !CONFIG_NEED_MULTIPLE_NODES */
+
++static inline unsigned long long get_total_mem(void)
++{
++ unsigned long long total;
++
++ total = max_low_pfn - min_low_pfn;
++#ifdef CONFIG_HIGHMEM
++ total += highend_pfn - highstart_pfn;
++#endif
++
++ return total << PAGE_SHIFT;
++}
++
++#ifdef CONFIG_KEXEC
++#ifndef CONFIG_XEN
++static void __init reserve_crashkernel(void)
++{
++ unsigned long long total_mem;
++ unsigned long long crash_size, crash_base;
++ int ret;
++
++ total_mem = get_total_mem();
++
++ ret = parse_crashkernel(boot_command_line, total_mem,
++ &crash_size, &crash_base);
++ if (ret == 0 && crash_size > 0) {
++ if (crash_base > 0) {
++ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
++ "for crashkernel (System RAM: %ldMB)\n",
++ (unsigned long)(crash_size >> 20),
++ (unsigned long)(crash_base >> 20),
++ (unsigned long)(total_mem >> 20));
++ crashk_res.start = crash_base;
++ crashk_res.end = crash_base + crash_size - 1;
++ reserve_bootmem(crash_base, crash_size);
++ } else
++ printk(KERN_INFO "crashkernel reservation failed - "
++ "you have to specify a base address\n");
++ }
++}
++#else
++#define reserve_crashkernel xen_machine_kexec_setup_resources
++#endif
++#else
++static inline void __init reserve_crashkernel(void)
++{}
++#endif
++
+ void __init setup_bootmem_allocator(void)
+ {
+ unsigned long bootmap_size;
+@@ -471,30 +516,25 @@ void __init setup_bootmem_allocator(void
+
+ #ifdef CONFIG_BLK_DEV_INITRD
+ if (xen_start_info->mod_start) {
+- if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
+- /*reserve_bootmem(INITRD_START, INITRD_SIZE);*/
+- initrd_start = INITRD_START + PAGE_OFFSET;
+- initrd_end = initrd_start+INITRD_SIZE;
++ unsigned long ramdisk_image = __pa(xen_start_info->mod_start);
++ unsigned long ramdisk_size = xen_start_info->mod_len;
++ unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
++ unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
++
++ if (ramdisk_end <= end_of_lowmem) {
++ /*reserve_bootmem(ramdisk_image, ramdisk_size);*/
++ initrd_start = ramdisk_image + PAGE_OFFSET;
++ initrd_end = initrd_start+ramdisk_size;
+ initrd_below_start_ok = 1;
+- }
+- else {
++ } else {
+ printk(KERN_ERR "initrd extends beyond end of memory "
+- "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+- INITRD_START + INITRD_SIZE,
+- max_low_pfn << PAGE_SHIFT);
++ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
++ ramdisk_end, end_of_lowmem);
+ initrd_start = 0;
+ }
+ }
+ #endif
+-#ifdef CONFIG_KEXEC
+-#ifdef CONFIG_XEN
+- xen_machine_kexec_setup_resources();
+-#else
+- if (crashk_res.start != crashk_res.end)
+- reserve_bootmem(crashk_res.start,
+- crashk_res.end - crashk_res.start + 1);
+-#endif
+-#endif
++ reserve_crashkernel();
+ }
+
+ /*
+@@ -572,7 +612,8 @@ void __init setup_arch(char **cmdline_p)
+ * the system table is valid. If not, then initialize normally.
+ */
+ #ifdef CONFIG_EFI
+- if ((LOADER_TYPE == 0x50) && EFI_SYSTAB)
++ if ((boot_params.hdr.type_of_loader == 0x50) &&
++ boot_params.efi_info.efi_systab)
+ efi_enabled = 1;
+ #endif
+
+@@ -580,18 +621,18 @@ void __init setup_arch(char **cmdline_p)
+ properly. Setting ROOT_DEV to default to /dev/ram0 breaks initrd.
+ */
+ ROOT_DEV = MKDEV(UNNAMED_MAJOR,0);
+- screen_info = SCREEN_INFO;
++ screen_info = boot_params.screen_info;
+ copy_edid();
+- apm_info.bios = APM_BIOS_INFO;
+- ist_info = IST_INFO;
+- saved_videomode = VIDEO_MODE;
+- if( SYS_DESC_TABLE.length != 0 ) {
+- set_mca_bus(SYS_DESC_TABLE.table[3] & 0x2);
+- machine_id = SYS_DESC_TABLE.table[0];
+- machine_submodel_id = SYS_DESC_TABLE.table[1];
+- BIOS_revision = SYS_DESC_TABLE.table[2];
++ apm_info.bios = boot_params.apm_bios_info;
++ ist_info = boot_params.ist_info;
++ saved_videomode = boot_params.hdr.vid_mode;
++ if( boot_params.sys_desc_table.length != 0 ) {
++ set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
++ machine_id = boot_params.sys_desc_table.table[0];
++ machine_submodel_id = boot_params.sys_desc_table.table[1];
++ BIOS_revision = boot_params.sys_desc_table.table[2];
+ }
+- bootloader_type = LOADER_TYPE;
++ bootloader_type = boot_params.hdr.type_of_loader;
+
+ if (is_initial_xendomain()) {
+ const struct dom0_vga_console_info *info =
+@@ -606,9 +647,9 @@ void __init setup_arch(char **cmdline_p)
+ screen_info.orig_video_isVGA = 0;
+
+ #ifdef CONFIG_BLK_DEV_RAM
+- rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+- rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
+- rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
++ rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
++ rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
++ rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
+ #endif
+
+ ARCH_SETUP
+@@ -621,7 +662,7 @@ void __init setup_arch(char **cmdline_p)
+
+ copy_edd();
+
+- if (!MOUNT_ROOT_RDONLY)
++ if (!boot_params.hdr.root_flags)
+ root_mountflags &= ~MS_RDONLY;
+ init_mm.start_code = (unsigned long) _text;
+ init_mm.end_code = (unsigned long) _etext;
+@@ -633,6 +674,8 @@ void __init setup_arch(char **cmdline_p)
+ code_resource.end = virt_to_phys(_etext)-1;
+ data_resource.start = virt_to_phys(_etext);
+ data_resource.end = virt_to_phys(_edata)-1;
++ bss_resource.start = virt_to_phys(&__bss_start);
++ bss_resource.end = virt_to_phys(&__bss_stop)-1;
+
+ if ((i = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
+ i = COMMAND_LINE_SIZE;
+@@ -661,7 +704,7 @@ void __init setup_arch(char **cmdline_p)
+ /*
+ * NOTE: before this point _nobody_ is allowed to allocate
+ * any memory using the bootmem allocator. Although the
+- * alloctor is now initialised only the first 8Mb of the kernel
++ * allocator is now initialised only the first 8Mb of the kernel
+ * virtual address space has been mapped. All allocations before
+ * paging_init() has completed must use the alloc_bootmem_low_pages()
+ * variant (which allocates DMA'able memory) and care must be taken
+@@ -784,10 +827,8 @@ void __init setup_arch(char **cmdline_p)
+ acpi_boot_table_init();
+ #endif
+
+-#ifdef CONFIG_PCI
+-#ifdef CONFIG_X86_IO_APIC
+- check_acpi_pci(); /* Checks more than just ACPI actually */
+-#endif
++#if defined(CONFIG_PCI) && !defined(CONFIG_XEN)
++ early_quirks();
+ #endif
+
+ #ifdef CONFIG_ACPI
+Index: head-2008-12-01/arch/x86/kernel/setup_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,10 +1,5 @@
+ /*
+- * linux/arch/x86-64/kernel/setup.c
+- *
+ * Copyright (C) 1995 Linus Torvalds
+- *
+- * Nov 2001 Dave Jones <davej@suse.de>
+- * Forked from i386 setup code.
+ */
+
+ /*
+@@ -57,13 +52,13 @@
+ #include <asm/dma.h>
+ #include <asm/mpspec.h>
+ #include <asm/mmu_context.h>
+-#include <asm/bootsetup.h>
+ #include <asm/proto.h>
+ #include <asm/setup.h>
+ #include <asm/mach_apic.h>
+ #include <asm/numa.h>
+ #include <asm/sections.h>
+ #include <asm/dmi.h>
++#include <asm/cacheflush.h>
+ #ifdef CONFIG_XEN
+ #include <linux/percpu.h>
+ #include <xen/interface/physdev.h>
+@@ -180,6 +175,12 @@ struct resource code_resource = {
+ .end = 0,
+ .flags = IORESOURCE_RAM,
+ };
++struct resource bss_resource = {
++ .name = "Kernel bss",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_RAM,
++};
+
+ #ifdef CONFIG_PROC_VMCORE
+ /* elfcorehdr= specifies the location of elf core header
+@@ -231,10 +232,11 @@ EXPORT_SYMBOL(edd);
+ */
+ static inline void copy_edd(void)
+ {
+- memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
+- memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
+- edd.mbr_signature_nr = EDD_MBR_SIG_NR;
+- edd.edd_info_nr = EDD_NR;
++ memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
++ sizeof(edd.mbr_signature));
++ memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
++ edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
++ edd.edd_info_nr = boot_params.eddbuf_entries;
+ }
+ #endif
+ #else
+@@ -243,6 +245,41 @@ static inline void copy_edd(void)
+ }
+ #endif
+
++#ifdef CONFIG_KEXEC
++#ifndef CONFIG_XEN
++static void __init reserve_crashkernel(void)
++{
++ unsigned long long free_mem;
++ unsigned long long crash_size, crash_base;
++ int ret;
++
++ free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
++
++ ret = parse_crashkernel(boot_command_line, free_mem,
++ &crash_size, &crash_base);
++ if (ret == 0 && crash_size) {
++ if (crash_base > 0) {
++ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
++ "for crashkernel (System RAM: %ldMB)\n",
++ (unsigned long)(crash_size >> 20),
++ (unsigned long)(crash_base >> 20),
++ (unsigned long)(free_mem >> 20));
++ crashk_res.start = crash_base;
++ crashk_res.end = crash_base + crash_size - 1;
++ reserve_bootmem(crash_base, crash_size);
++ } else
++ printk(KERN_INFO "crashkernel reservation failed - "
++ "you have to specify a base address\n");
++ }
++}
++#else
++#define reserve_crashkernel xen_machine_kexec_setup_resources
++#endif
++#else
++static inline void __init reserve_crashkernel(void)
++{}
++#endif
++
+ #ifndef CONFIG_XEN
+ #define EBDA_ADDR_POINTER 0x40E
+
+@@ -283,7 +320,7 @@ void __init setup_arch(char **cmdline_p)
+ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+
+ ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
+- screen_info = SCREEN_INFO;
++ screen_info = boot_params.screen_info;
+
+ if (is_initial_xendomain()) {
+ const struct dom0_vga_console_info *info =
+@@ -306,22 +343,22 @@ void __init setup_arch(char **cmdline_p)
+ #else
+ printk(KERN_INFO "Command line: %s\n", boot_command_line);
+
+- ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
+- screen_info = SCREEN_INFO;
+- edid_info = EDID_INFO;
++ ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
++ screen_info = boot_params.screen_info;
++ edid_info = boot_params.edid_info;
+ #endif /* !CONFIG_XEN */
+- saved_video_mode = SAVED_VIDEO_MODE;
+- bootloader_type = LOADER_TYPE;
++ saved_video_mode = boot_params.hdr.vid_mode;
++ bootloader_type = boot_params.hdr.type_of_loader;
+
+ #ifdef CONFIG_BLK_DEV_RAM
+- rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+- rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
+- rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
++ rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
++ rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
++ rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
+ #endif
+ setup_memory_region();
+ copy_edd();
+
+- if (!MOUNT_ROOT_RDONLY)
++ if (!boot_params.hdr.root_flags)
+ root_mountflags &= ~MS_RDONLY;
+ init_mm.start_code = (unsigned long) &_text;
+ init_mm.end_code = (unsigned long) &_etext;
+@@ -332,6 +369,8 @@ void __init setup_arch(char **cmdline_p)
+ code_resource.end = virt_to_phys(&_etext)-1;
+ data_resource.start = virt_to_phys(&_etext);
+ data_resource.end = virt_to_phys(&_edata)-1;
++ bss_resource.start = virt_to_phys(&__bss_start);
++ bss_resource.end = virt_to_phys(&__bss_stop)-1;
+
+ early_identify_cpu(&boot_cpu_data);
+
+@@ -359,6 +398,11 @@ void __init setup_arch(char **cmdline_p)
+ if (is_initial_xendomain())
+ dmi_scan_machine();
+
++#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
++ /* setup to use the static apicid table during kernel startup */
++ x86_cpu_to_apicid_ptr = (void *)&x86_cpu_to_apicid_init;
++#endif
++
+ /* How many end-of-memory variables you have, grandma! */
+ max_low_pfn = end_pfn;
+ max_pfn = end_pfn;
+@@ -423,52 +467,37 @@ void __init setup_arch(char **cmdline_p)
+ */
+ acpi_reserve_bootmem();
+ #endif
+-#ifdef CONFIG_XEN
+ #ifdef CONFIG_BLK_DEV_INITRD
++#ifdef CONFIG_XEN
+ if (xen_start_info->mod_start) {
+- if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
+- /*reserve_bootmem_generic(INITRD_START, INITRD_SIZE);*/
+- initrd_start = INITRD_START + PAGE_OFFSET;
+- initrd_end = initrd_start+INITRD_SIZE;
++ unsigned long ramdisk_image = __pa(xen_start_info->mod_start);
++ unsigned long ramdisk_size = xen_start_info->mod_len;
++#else
++ if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
++ unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
++ unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
++#endif
++ unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
++ unsigned long end_of_mem = end_pfn << PAGE_SHIFT;
++
++ if (ramdisk_end <= end_of_mem) {
++#ifndef CONFIG_XEN
++ reserve_bootmem_generic(ramdisk_image, ramdisk_size);
++#endif
++ initrd_start = ramdisk_image + PAGE_OFFSET;
++ initrd_end = initrd_start+ramdisk_size;
++#ifdef CONFIG_XEN
+ initrd_below_start_ok = 1;
+- } else {
+- printk(KERN_ERR "initrd extends beyond end of memory "
+- "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+- (unsigned long)(INITRD_START + INITRD_SIZE),
+- (unsigned long)(end_pfn << PAGE_SHIFT));
+- initrd_start = 0;
+- }
+- }
+ #endif
+-#else /* CONFIG_XEN */
+-#ifdef CONFIG_BLK_DEV_INITRD
+- if (LOADER_TYPE && INITRD_START) {
+- if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
+- reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
+- initrd_start = INITRD_START + PAGE_OFFSET;
+- initrd_end = initrd_start+INITRD_SIZE;
+- }
+- else {
++ } else {
+ printk(KERN_ERR "initrd extends beyond end of memory "
+- "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+- (unsigned long)(INITRD_START + INITRD_SIZE),
+- (unsigned long)(end_pfn << PAGE_SHIFT));
++ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
++ ramdisk_end, end_of_mem);
+ initrd_start = 0;
+ }
+ }
+ #endif
+-#endif /* !CONFIG_XEN */
+-#ifdef CONFIG_KEXEC
+-#ifdef CONFIG_XEN
+- xen_machine_kexec_setup_resources();
+-#else
+- if (crashk_res.start != crashk_res.end) {
+- reserve_bootmem_generic(crashk_res.start,
+- crashk_res.end - crashk_res.start + 1);
+- }
+-#endif
+-#endif
+-
++ reserve_crashkernel();
+ paging_init();
+ #ifdef CONFIG_X86_LOCAL_APIC
+ /*
+@@ -783,7 +812,7 @@ static void __init amd_detect_cmp(struct
+ but in the same order as the HT nodeids.
+ If that doesn't result in a usable node fall back to the
+ path for the previous case. */
+- int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits);
++ int ht_nodeid = apicid - (cpu_data(0).phys_proc_id << bits);
+ if (ht_nodeid >= 0 &&
+ apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
+ node = apicid_to_node[ht_nodeid];
+@@ -798,6 +827,39 @@ static void __init amd_detect_cmp(struct
+ #endif
+ }
+
++#define ENABLE_C1E_MASK 0x18000000
++#define CPUID_PROCESSOR_SIGNATURE 1
++#define CPUID_XFAM 0x0ff00000
++#define CPUID_XFAM_K8 0x00000000
++#define CPUID_XFAM_10H 0x00100000
++#define CPUID_XFAM_11H 0x00200000
++#define CPUID_XMOD 0x000f0000
++#define CPUID_XMOD_REV_F 0x00040000
++
++#ifndef CONFIG_XEN
++/* AMD systems with C1E don't have a working lAPIC timer. Check for that. */
++static __cpuinit int amd_apic_timer_broken(void)
++{
++ u32 lo, hi;
++ u32 eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
++ switch (eax & CPUID_XFAM) {
++ case CPUID_XFAM_K8:
++ if ((eax & CPUID_XMOD) < CPUID_XMOD_REV_F)
++ break;
++ case CPUID_XFAM_10H:
++ case CPUID_XFAM_11H:
++ rdmsr(MSR_K8_ENABLE_C1E, lo, hi);
++ if (lo & ENABLE_C1E_MASK)
++ return 1;
++ break;
++ default:
++ /* err on the side of caution */
++ return 1;
++ }
++ return 0;
++}
++#endif
++
+ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
+ {
+ unsigned level;
+@@ -827,7 +889,7 @@ static void __cpuinit init_amd(struct cp
+ level = cpuid_eax(1);
+ if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
+ set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
+- if (c->x86 == 0x10)
++ if (c->x86 == 0x10 || c->x86 == 0x11)
+ set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
+
+ /* Enable workaround for FXSAVE leak */
+@@ -869,6 +931,11 @@ static void __cpuinit init_amd(struct cp
+ /* Family 10 doesn't support C states in MWAIT so don't use it */
+ if (c->x86 == 0x10 && !force_mwait)
+ clear_bit(X86_FEATURE_MWAIT, &c->x86_capability);
++
++#ifndef CONFIG_XEN
++ if (amd_apic_timer_broken())
++ disable_apic_timer = 1;
++#endif
+ }
+
+ static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
+@@ -1179,6 +1246,7 @@ void __cpuinit print_cpu_info(struct cpu
+ static int show_cpuinfo(struct seq_file *m, void *v)
+ {
+ struct cpuinfo_x86 *c = v;
++ int cpu = 0;
+
+ /*
+ * These flag bits must match the definitions in <asm/cpufeature.h>.
+@@ -1188,7 +1256,7 @@ static int show_cpuinfo(struct seq_file
+ * applications want to get the raw CPUID data, they should access
+ * /dev/cpu/<cpu_nr>/cpuid instead.
+ */
+- static char *x86_cap_flags[] = {
++ static const char *const x86_cap_flags[] = {
+ /* Intel-defined */
+ "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
+ "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
+@@ -1219,7 +1287,7 @@ static int show_cpuinfo(struct seq_file
+ /* Intel-defined (#2) */
+ "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
+ "tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
+- NULL, NULL, "dca", NULL, NULL, NULL, NULL, "popcnt",
++ NULL, NULL, "dca", "sse4_1", "sse4_2", NULL, NULL, "popcnt",
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* VIA/Cyrix/Centaur-defined */
+@@ -1229,10 +1297,10 @@ static int show_cpuinfo(struct seq_file
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* AMD-defined (#2) */
+- "lahf_lm", "cmp_legacy", "svm", "extapic", "cr8_legacy",
+- "altmovcr8", "abm", "sse4a",
+- "misalignsse", "3dnowprefetch",
+- "osvw", "ibs", NULL, NULL, NULL, NULL,
++ "lahf_lm", "cmp_legacy", "svm", "extapic",
++ "cr8_legacy", "abm", "sse4a", "misalignsse",
++ "3dnowprefetch", "osvw", "ibs", "sse5",
++ "skinit", "wdt", NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+@@ -1242,7 +1310,7 @@ static int show_cpuinfo(struct seq_file
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ };
+- static char *x86_power_flags[] = {
++ static const char *const x86_power_flags[] = {
+ "ts", /* temperature sensor */
+ "fid", /* frequency id control */
+ "vid", /* voltage id control */
+@@ -1257,8 +1325,7 @@ static int show_cpuinfo(struct seq_file
+
+
+ #ifdef CONFIG_SMP
+- if (!cpu_online(c-cpu_data))
+- return 0;
++ cpu = c->cpu_index;
+ #endif
+
+ seq_printf(m,"processor\t: %u\n"
+@@ -1266,7 +1333,7 @@ static int show_cpuinfo(struct seq_file
+ "cpu family\t: %d\n"
+ "model\t\t: %d\n"
+ "model name\t: %s\n",
+- (unsigned)(c-cpu_data),
++ (unsigned)cpu,
+ c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
+ c->x86,
+ (int)c->x86_model,
+@@ -1278,7 +1345,7 @@ static int show_cpuinfo(struct seq_file
+ seq_printf(m, "stepping\t: unknown\n");
+
+ if (cpu_has(c,X86_FEATURE_TSC)) {
+- unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
++ unsigned int freq = cpufreq_quick_get((unsigned)cpu);
+ if (!freq)
+ freq = cpu_khz;
+ seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
+@@ -1291,9 +1358,9 @@ static int show_cpuinfo(struct seq_file
+
+ #ifdef CONFIG_SMP
+ if (smp_num_siblings * c->x86_max_cores > 1) {
+- int cpu = c - cpu_data;
+ seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
+- seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
++ seq_printf(m, "siblings\t: %d\n",
++ cpus_weight(per_cpu(cpu_core_map, cpu)));
+ seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
+ seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
+ }
+@@ -1348,12 +1415,16 @@ static int show_cpuinfo(struct seq_file
+
+ static void *c_start(struct seq_file *m, loff_t *pos)
+ {
+- return *pos < NR_CPUS ? cpu_data + *pos : NULL;
++ if (*pos == 0) /* just in case, cpu 0 is not the first */
++ *pos = first_cpu(cpu_online_map);
++ if ((*pos) < NR_CPUS && cpu_online(*pos))
++ return &cpu_data(*pos);
++ return NULL;
+ }
+
+ static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+ {
+- ++*pos;
++ *pos = next_cpu(*pos, cpu_online_map);
+ return c_start(m, pos);
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/smp_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -72,7 +72,7 @@
+ *
+ * B stepping CPUs may hang. There are hardware work arounds
+ * for this. We warn about it in case your board doesn't have the work
+- * arounds. Basically thats so I can tell anyone with a B stepping
++ * arounds. Basically that's so I can tell anyone with a B stepping
+ * CPU and SMP problems "tough".
+ *
+ * Specific items [From Pentium Processor Specification Update]
+@@ -241,7 +241,7 @@ void leave_mm(unsigned long cpu)
+ * 1a1) cpu_clear(cpu, old_mm->cpu_vm_mask);
+ * Stop ipi delivery for the old mm. This is not synchronized with
+ * the other cpus, but smp_invalidate_interrupt ignore flush ipis
+- * for the wrong mm, and in the worst case we perform a superflous
++ * for the wrong mm, and in the worst case we perform a superfluous
+ * tlb flush.
+ * 1a2) set cpu_tlbstate to TLBSTATE_OK
+ * Now the smp_invalidate_interrupt won't call leave_mm if cpu0
+@@ -309,6 +309,7 @@ irqreturn_t smp_invalidate_interrupt(int
+ smp_mb__after_clear_bit();
+ out:
+ put_cpu_no_resched();
++ __get_cpu_var(irq_stat).irq_tlb_count++;
+
+ return IRQ_HANDLED;
+ }
+@@ -580,7 +581,7 @@ static void stop_this_cpu (void * dummy)
+ */
+ cpu_clear(smp_processor_id(), cpu_online_map);
+ disable_all_local_evtchn();
+- if (cpu_data[smp_processor_id()].hlt_works_ok)
++ if (cpu_data(smp_processor_id()).hlt_works_ok)
+ for(;;) halt();
+ for (;;);
+ }
+@@ -610,6 +611,7 @@ void xen_smp_send_stop(void)
+ */
+ irqreturn_t smp_reschedule_interrupt(int irq, void *dev_id)
+ {
++ __get_cpu_var(irq_stat).irq_resched_count++;
+
+ return IRQ_HANDLED;
+ }
+@@ -632,6 +634,7 @@ irqreturn_t smp_call_function_interrupt(
+ */
+ irq_enter();
+ (*func)(info);
++ __get_cpu_var(irq_stat).irq_call_count++;
+ irq_exit();
+
+ if (wait) {
+Index: head-2008-12-01/arch/x86/kernel/smp_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -167,6 +167,7 @@ asmlinkage void smp_invalidate_interrupt
+ out:
+ ack_APIC_irq();
+ cpu_clear(cpu, f->flush_cpumask);
++ add_pda(irq_tlb_count, 1);
+ }
+
+ static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
+@@ -326,17 +327,27 @@ void unlock_ipi_call_lock(void)
+ }
+
+ /*
+- * this function sends a 'generic call function' IPI to one other CPU
+- * in the system.
+- *
+- * cpu is a standard Linux logical CPU number.
++ * this function sends a 'generic call function' IPI to all other CPU
++ * of the system defined in the mask.
+ */
+-static void
+-__smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+- int nonatomic, int wait)
++
++static int
++__smp_call_function_mask(cpumask_t mask,
++ void (*func)(void *), void *info,
++ int wait)
+ {
+ struct call_data_struct data;
+- int cpus = 1;
++ cpumask_t allbutself;
++ int cpus;
++
++ allbutself = cpu_online_map;
++ cpu_clear(smp_processor_id(), allbutself);
++
++ cpus_and(mask, mask, allbutself);
++ cpus = cpus_weight(mask);
++
++ if (!cpus)
++ return 0;
+
+ data.func = func;
+ data.info = info;
+@@ -347,19 +358,55 @@ __smp_call_function_single(int cpu, void
+
+ call_data = &data;
+ wmb();
+- /* Send a message to all other CPUs and wait for them to respond */
+- send_IPI_mask(cpumask_of_cpu(cpu), CALL_FUNCTION_VECTOR);
++
++ /* Send a message to other CPUs */
++ if (cpus_equal(mask, allbutself))
++ send_IPI_allbutself(CALL_FUNCTION_VECTOR);
++ else
++ send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
+
+ /* Wait for response */
+ while (atomic_read(&data.started) != cpus)
+ cpu_relax();
+
+ if (!wait)
+- return;
++ return 0;
+
+ while (atomic_read(&data.finished) != cpus)
+ cpu_relax();
++
++ return 0;
++}
++/**
++ * smp_call_function_mask(): Run a function on a set of other CPUs.
++ * @mask: The set of cpus to run on. Must not include the current cpu.
++ * @func: The function to run. This must be fast and non-blocking.
++ * @info: An arbitrary pointer to pass to the function.
++ * @wait: If true, wait (atomically) until function has completed on other CPUs.
++ *
++ * Returns 0 on success, else a negative status code.
++ *
++ * If @wait is true, then returns once @func has returned; otherwise
++ * it returns just before the target cpu calls @func.
++ *
++ * You must not call this function with disabled interrupts or from a
++ * hardware interrupt handler or from a bottom half handler.
++ */
++int smp_call_function_mask(cpumask_t mask,
++ void (*func)(void *), void *info,
++ int wait)
++{
++ int ret;
++
++ /* Can deadlock when called with interrupts disabled */
++ WARN_ON(irqs_disabled());
++
++ spin_lock(&call_lock);
++ ret = __smp_call_function_mask(mask, func, info, wait);
++ spin_unlock(&call_lock);
++ return ret;
+ }
++EXPORT_SYMBOL(smp_call_function_mask);
+
+ /*
+ * smp_call_function_single - Run a function on a specific CPU
+@@ -378,6 +425,7 @@ int smp_call_function_single (int cpu, v
+ int nonatomic, int wait)
+ {
+ /* prevent preemption and reschedule on another processor */
++ int ret;
+ int me = get_cpu();
+
+ /* Can deadlock when called with interrupts disabled */
+@@ -391,51 +439,14 @@ int smp_call_function_single (int cpu, v
+ return 0;
+ }
+
+- spin_lock(&call_lock);
+- __smp_call_function_single(cpu, func, info, nonatomic, wait);
+- spin_unlock(&call_lock);
++ ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, wait);
++
+ put_cpu();
+- return 0;
++ return ret;
+ }
+ EXPORT_SYMBOL(smp_call_function_single);
+
+ /*
+- * this function sends a 'generic call function' IPI to all other CPUs
+- * in the system.
+- */
+-static void __smp_call_function (void (*func) (void *info), void *info,
+- int nonatomic, int wait)
+-{
+- struct call_data_struct data;
+- int cpus = num_online_cpus()-1;
+-
+- if (!cpus)
+- return;
+-
+- data.func = func;
+- data.info = info;
+- atomic_set(&data.started, 0);
+- data.wait = wait;
+- if (wait)
+- atomic_set(&data.finished, 0);
+-
+- call_data = &data;
+- wmb();
+- /* Send a message to all other CPUs and wait for them to respond */
+- send_IPI_allbutself(CALL_FUNCTION_VECTOR);
+-
+- /* Wait for response */
+- while (atomic_read(&data.started) != cpus)
+- cpu_relax();
+-
+- if (!wait)
+- return;
+-
+- while (atomic_read(&data.finished) != cpus)
+- cpu_relax();
+-}
+-
+-/*
+ * smp_call_function - run a function on all other CPUs.
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+@@ -453,10 +464,7 @@ static void __smp_call_function (void (*
+ int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
+ int wait)
+ {
+- spin_lock(&call_lock);
+- __smp_call_function(func,info,nonatomic,wait);
+- spin_unlock(&call_lock);
+- return 0;
++ return smp_call_function_mask(cpu_online_map, func, info, wait);
+ }
+ EXPORT_SYMBOL(smp_call_function);
+
+@@ -485,7 +493,7 @@ void smp_send_stop(void)
+ /* Don't deadlock on the call lock in panic */
+ nolock = !spin_trylock(&call_lock);
+ local_irq_save(flags);
+- __smp_call_function(stop_this_cpu, NULL, 0, 0);
++ __smp_call_function_mask(cpu_online_map, stop_this_cpu, NULL, 0);
+ if (!nolock)
+ spin_unlock(&call_lock);
+ disable_all_local_evtchn();
+@@ -505,7 +513,9 @@ asmlinkage irqreturn_t smp_reschedule_in
+ {
+ #ifndef CONFIG_XEN
+ ack_APIC_irq();
+-#else
++#endif
++ add_pda(irq_resched_count, 1);
++#ifdef CONFIG_XEN
+ return IRQ_HANDLED;
+ #endif
+ }
+@@ -535,6 +545,7 @@ asmlinkage irqreturn_t smp_call_function
+ exit_idle();
+ irq_enter();
+ (*func)(info);
++ add_pda(irq_call_count, 1);
+ irq_exit();
+ if (wait) {
+ mb();
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/i386/kernel/time.c
+- *
+ * Copyright (C) 1991, 1992, 1995 Linus Torvalds
+ *
+ * This file contains the PC-specific time handling details:
+@@ -74,6 +72,7 @@
+ #include <asm/arch_hooks.h>
+
+ #include <xen/evtchn.h>
++#include <xen/sysctl.h>
+ #include <xen/interface/vcpu.h>
+
+ #include <asm/i8253.h>
+@@ -546,6 +545,13 @@ irqreturn_t timer_interrupt(int irq, voi
+ struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
+ struct vcpu_runstate_info runstate;
+
++ /* Keep nmi watchdog up to date */
++#ifdef __i386__
++ per_cpu(irq_stat, smp_processor_id()).irq0_irqs++;
++#else
++ add_pda(irq0_irqs, 1);
++#endif
++
+ /*
+ * Here we are in the timer irq handler. We just have irqs locally
+ * disabled but we don't know if the timer_bh is running on the other
+@@ -996,7 +1002,7 @@ static int time_cpufreq_notifier(struct
+ struct cpufreq_freqs *freq = data;
+ struct xen_platform_op op;
+
+- if (cpu_has(&cpu_data[freq->cpu], X86_FEATURE_CONSTANT_TSC))
++ if (cpu_has(&cpu_data(freq->cpu), X86_FEATURE_CONSTANT_TSC))
+ return 0;
+
+ if (val == CPUFREQ_PRECHANGE)
+@@ -1034,30 +1040,33 @@ core_initcall(cpufreq_time_setup);
+ */
+ static ctl_table xen_subtable[] = {
+ {
+- .ctl_name = 1,
++ .ctl_name = CTL_XEN_INDEPENDENT_WALLCLOCK,
+ .procname = "independent_wallclock",
+ .data = &independent_wallclock,
+ .maxlen = sizeof(independent_wallclock),
+ .mode = 0644,
++ .strategy = sysctl_data,
+ .proc_handler = proc_dointvec
+ },
+ {
+- .ctl_name = 2,
++ .ctl_name = CTL_XEN_PERMITTED_CLOCK_JITTER,
+ .procname = "permitted_clock_jitter",
+ .data = &permitted_clock_jitter,
+ .maxlen = sizeof(permitted_clock_jitter),
+ .mode = 0644,
++ .strategy = sysctl_data,
+ .proc_handler = proc_doulongvec_minmax
+ },
+- { 0 }
++ { }
+ };
+ static ctl_table xen_table[] = {
+ {
+- .ctl_name = 123,
++ .ctl_name = CTL_XEN,
+ .procname = "xen",
+ .mode = 0555,
+- .child = xen_subtable},
+- { 0 }
++ .child = xen_subtable
++ },
++ { }
+ };
+ static int __init xen_sysctl_init(void)
+ {
+Index: head-2008-12-01/arch/x86/kernel/traps_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/i386/traps.c
+- *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * Pentium III FXSR, SSE support
+@@ -65,6 +63,11 @@
+
+ int panic_on_unrecovered_nmi;
+
++#ifndef CONFIG_XEN
++DECLARE_BITMAP(used_vectors, NR_VECTORS);
++EXPORT_SYMBOL_GPL(used_vectors);
++#endif
++
+ asmlinkage int system_call(void);
+
+ /* Do we ignore FPU interrupts ? */
+@@ -120,7 +123,7 @@ struct stack_frame {
+
+ static inline unsigned long print_context_stack(struct thread_info *tinfo,
+ unsigned long *stack, unsigned long ebp,
+- struct stacktrace_ops *ops, void *data)
++ const struct stacktrace_ops *ops, void *data)
+ {
+ #ifdef CONFIG_FRAME_POINTER
+ struct stack_frame *frame = (struct stack_frame *)ebp;
+@@ -157,7 +160,7 @@ static inline unsigned long print_contex
+
+ void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack,
+- struct stacktrace_ops *ops, void *data)
++ const struct stacktrace_ops *ops, void *data)
+ {
+ unsigned long ebp = 0;
+
+@@ -229,7 +232,7 @@ static void print_trace_address(void *da
+ touch_nmi_watchdog();
+ }
+
+-static struct stacktrace_ops print_trace_ops = {
++static const struct stacktrace_ops print_trace_ops = {
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+ .stack = print_trace_stack,
+@@ -288,6 +291,11 @@ void dump_stack(void)
+ {
+ unsigned long stack;
+
++ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
++ current->pid, current->comm, print_tainted(),
++ init_utsname()->release,
++ (int)strcspn(init_utsname()->version, " "),
++ init_utsname()->version);
+ show_trace(current, NULL, &stack);
+ }
+
+@@ -296,48 +304,24 @@ EXPORT_SYMBOL(dump_stack);
+ void show_registers(struct pt_regs *regs)
+ {
+ int i;
+- int in_kernel = 1;
+- unsigned long esp;
+- unsigned short ss, gs;
+-
+- esp = (unsigned long) (®s->esp);
+- savesegment(ss, ss);
+- savesegment(gs, gs);
+- if (user_mode_vm(regs)) {
+- in_kernel = 0;
+- esp = regs->esp;
+- ss = regs->xss & 0xffff;
+- }
++
+ print_modules();
+- printk(KERN_EMERG "CPU: %d\n"
+- KERN_EMERG "EIP: %04x:[<%08lx>] %s VLI\n"
+- KERN_EMERG "EFLAGS: %08lx (%s %.*s)\n",
+- smp_processor_id(), 0xffff & regs->xcs, regs->eip,
+- print_tainted(), regs->eflags, init_utsname()->release,
+- (int)strcspn(init_utsname()->version, " "),
+- init_utsname()->version);
+- print_symbol(KERN_EMERG "EIP is at %s\n", regs->eip);
+- printk(KERN_EMERG "eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
+- regs->eax, regs->ebx, regs->ecx, regs->edx);
+- printk(KERN_EMERG "esi: %08lx edi: %08lx ebp: %08lx esp: %08lx\n",
+- regs->esi, regs->edi, regs->ebp, esp);
+- printk(KERN_EMERG "ds: %04x es: %04x fs: %04x gs: %04x ss: %04x\n",
+- regs->xds & 0xffff, regs->xes & 0xffff, regs->xfs & 0xffff, gs, ss);
++ __show_registers(regs, 0);
+ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+- TASK_COMM_LEN, current->comm, current->pid,
++ TASK_COMM_LEN, current->comm, task_pid_nr(current),
+ current_thread_info(), current, task_thread_info(current));
+ /*
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+ */
+- if (in_kernel) {
++ if (!user_mode_vm(regs)) {
+ u8 *eip;
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
+
+ printk("\n" KERN_EMERG "Stack: ");
+- show_stack_log_lvl(NULL, regs, (unsigned long *)esp, KERN_EMERG);
++ show_stack_log_lvl(NULL, regs, ®s->esp, KERN_EMERG);
+
+ printk(KERN_EMERG "Code: ");
+
+@@ -382,11 +366,11 @@ int is_valid_bugaddr(unsigned long eip)
+ void die(const char * str, struct pt_regs * regs, long err)
+ {
+ static struct {
+- spinlock_t lock;
++ raw_spinlock_t lock;
+ u32 lock_owner;
+ int lock_owner_depth;
+ } die = {
+- .lock = __SPIN_LOCK_UNLOCKED(die.lock),
++ .lock = __RAW_SPIN_LOCK_UNLOCKED,
+ .lock_owner = -1,
+ .lock_owner_depth = 0
+ };
+@@ -397,40 +381,33 @@ void die(const char * str, struct pt_reg
+
+ if (die.lock_owner != raw_smp_processor_id()) {
+ console_verbose();
+- spin_lock_irqsave(&die.lock, flags);
++ raw_local_irq_save(flags);
++ __raw_spin_lock(&die.lock);
+ die.lock_owner = smp_processor_id();
+ die.lock_owner_depth = 0;
+ bust_spinlocks(1);
+- }
+- else
+- local_save_flags(flags);
++ } else
++ raw_local_irq_save(flags);
+
+ if (++die.lock_owner_depth < 3) {
+- int nl = 0;
+ unsigned long esp;
+ unsigned short ss;
+
+ report_bug(regs->eip, regs);
+
+- printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
++ printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff,
++ ++die_counter);
+ #ifdef CONFIG_PREEMPT
+- printk(KERN_EMERG "PREEMPT ");
+- nl = 1;
++ printk("PREEMPT ");
+ #endif
+ #ifdef CONFIG_SMP
+- if (!nl)
+- printk(KERN_EMERG);
+ printk("SMP ");
+- nl = 1;
+ #endif
+ #ifdef CONFIG_DEBUG_PAGEALLOC
+- if (!nl)
+- printk(KERN_EMERG);
+ printk("DEBUG_PAGEALLOC");
+- nl = 1;
+ #endif
+- if (nl)
+- printk("\n");
++ printk("\n");
++
+ if (notify_die(DIE_OOPS, str, regs, err,
+ current->thread.trap_no, SIGSEGV) !=
+ NOTIFY_STOP) {
+@@ -454,7 +431,8 @@ void die(const char * str, struct pt_reg
+ bust_spinlocks(0);
+ die.lock_owner = -1;
+ add_taint(TAINT_DIE);
+- spin_unlock_irqrestore(&die.lock, flags);
++ __raw_spin_unlock(&die.lock);
++ raw_local_irq_restore(flags);
+
+ if (!regs)
+ return;
+@@ -571,6 +549,7 @@ fastcall void do_##name(struct pt_regs *
+ info.si_errno = 0; \
+ info.si_code = sicode; \
+ info.si_addr = (void __user *)siaddr; \
++ trace_hardirqs_fixup(); \
+ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+ == NOTIFY_STOP) \
+ return; \
+@@ -606,7 +585,7 @@ fastcall void __kprobes do_general_prote
+ printk_ratelimit())
+ printk(KERN_INFO
+ "%s[%d] general protection eip:%lx esp:%lx error:%lx\n",
+- current->comm, current->pid,
++ current->comm, task_pid_nr(current),
+ regs->eip, regs->esp, error_code);
+
+ force_sig(SIGSEGV, current);
+@@ -785,6 +764,8 @@ void restart_nmi(void)
+ #ifdef CONFIG_KPROBES
+ fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
+ {
++ trace_hardirqs_fixup();
++
+ if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
+ == NOTIFY_STOP)
+ return;
+@@ -822,6 +803,8 @@ fastcall void __kprobes do_debug(struct
+ unsigned int condition;
+ struct task_struct *tsk = current;
+
++ trace_hardirqs_fixup();
++
+ get_debugreg(condition, 6);
+
+ if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
+@@ -1084,20 +1067,6 @@ asmlinkage void math_emulate(long arg)
+
+ #endif /* CONFIG_MATH_EMULATION */
+
+-#ifdef CONFIG_X86_F00F_BUG
+-void __init trap_init_f00f_bug(void)
+-{
+- __set_fixmap(FIX_F00F_IDT, __pa(&idt_table), PAGE_KERNEL_RO);
+-
+- /*
+- * Update the IDT descriptor and reload the IDT so that
+- * it uses the read-only mapped virtual address.
+- */
+- idt_descr.address = fix_to_virt(FIX_F00F_IDT);
+- load_idt(&idt_descr);
+-}
+-#endif
+-
+
+ /*
+ * NB. All these are "trap gates" (i.e. events_mask isn't set) except
+Index: head-2008-12-01/arch/x86/kernel/traps_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/x86-64/traps.c
+- *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ *
+@@ -33,6 +31,7 @@
+ #include <linux/uaccess.h>
+ #include <linux/bug.h>
+ #include <linux/kdebug.h>
++#include <linux/utsname.h>
+
+ #if defined(CONFIG_EDAC)
+ #include <linux/edac.h>
+@@ -205,7 +204,7 @@ static unsigned long *in_exception_stack
+ #define MSG(txt) ops->warning(data, txt)
+
+ /*
+- * x86-64 can have upto three kernel stacks:
++ * x86-64 can have up to three kernel stacks:
+ * process stack
+ * interrupt stack
+ * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
+@@ -219,7 +218,7 @@ static inline int valid_stack_ptr(struct
+
+ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
+ unsigned long *stack,
+- struct stacktrace_ops *ops, void *data)
++ const struct stacktrace_ops *ops, void *data)
+ {
+ const unsigned cpu = get_cpu();
+ unsigned long *irqstack_end = (unsigned long*)cpu_pda(cpu)->irqstackptr;
+@@ -340,7 +339,7 @@ static void print_trace_address(void *da
+ printk_address(addr);
+ }
+
+-static struct stacktrace_ops print_trace_ops = {
++static const struct stacktrace_ops print_trace_ops = {
+ .warning = print_trace_warning,
+ .warning_symbol = print_trace_warning_symbol,
+ .stack = print_trace_stack,
+@@ -404,6 +403,12 @@ void show_stack(struct task_struct *tsk,
+ void dump_stack(void)
+ {
+ unsigned long dummy;
++
++ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
++ current->pid, current->comm, print_tainted(),
++ init_utsname()->release,
++ (int)strcspn(init_utsname()->version, " "),
++ init_utsname()->version);
+ show_trace(NULL, NULL, &dummy);
+ }
+
+@@ -466,7 +471,7 @@ void out_of_line_bug(void)
+ EXPORT_SYMBOL(out_of_line_bug);
+ #endif
+
+-static DEFINE_SPINLOCK(die_lock);
++static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+ static int die_owner = -1;
+ static unsigned int die_nest_count;
+
+@@ -478,13 +483,13 @@ unsigned __kprobes long oops_begin(void)
+ oops_enter();
+
+ /* racy, but better than risking deadlock. */
+- local_irq_save(flags);
++ raw_local_irq_save(flags);
+ cpu = smp_processor_id();
+- if (!spin_trylock(&die_lock)) {
++ if (!__raw_spin_trylock(&die_lock)) {
+ if (cpu == die_owner)
+ /* nested oops. should stop eventually */;
+ else
+- spin_lock(&die_lock);
++ __raw_spin_lock(&die_lock);
+ }
+ die_nest_count++;
+ die_owner = cpu;
+@@ -498,12 +503,10 @@ void __kprobes oops_end(unsigned long fl
+ die_owner = -1;
+ bust_spinlocks(0);
+ die_nest_count--;
+- if (die_nest_count)
+- /* We still own the lock */
+- local_irq_restore(flags);
+- else
++ if (!die_nest_count)
+ /* Nest count reaches zero, release the lock. */
+- spin_unlock_irqrestore(&die_lock, flags);
++ __raw_spin_unlock(&die_lock);
++ raw_local_irq_restore(flags);
+ if (panic_on_oops)
+ panic("Fatal exception");
+ oops_exit();
+@@ -636,6 +639,7 @@ asmlinkage void do_##name(struct pt_regs
+ info.si_errno = 0; \
+ info.si_code = sicode; \
+ info.si_addr = (void __user *)siaddr; \
++ trace_hardirqs_fixup(); \
+ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+ == NOTIFY_STOP) \
+ return; \
+@@ -741,11 +745,8 @@ mem_parity_error(unsigned char reason, s
+
+ printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+
+-#if 0 /* XEN */
+ /* Clear and disable the memory parity error line. */
+- reason = (reason & 0xf) | 4;
+- outb(reason, 0x61);
+-#endif /* XEN */
++ clear_mem_error(reason);
+ }
+
+ static __kprobes void
+@@ -754,14 +755,8 @@ io_check_error(unsigned char reason, str
+ printk("NMI: IOCK error (debug interrupt?)\n");
+ show_registers(regs);
+
+-#if 0 /* XEN */
+ /* Re-enable the IOCK line, wait for a few seconds */
+- reason = (reason & 0xf) | 8;
+- outb(reason, 0x61);
+- mdelay(2000);
+- reason &= ~8;
+- outb(reason, 0x61);
+-#endif /* XEN */
++ clear_io_check_error(reason);
+ }
+
+ static __kprobes void
+@@ -821,6 +816,8 @@ asmlinkage __kprobes void default_do_nmi
+ /* runs on IST stack. */
+ asmlinkage void __kprobes do_int3(struct pt_regs * regs, long error_code)
+ {
++ trace_hardirqs_fixup();
++
+ if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) == NOTIFY_STOP) {
+ return;
+ }
+@@ -858,6 +855,8 @@ asmlinkage void __kprobes do_debug(struc
+ struct task_struct *tsk = current;
+ siginfo_t info;
+
++ trace_hardirqs_fixup();
++
+ get_debugreg(condition, 6);
+
+ if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
+Index: head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,4 @@
+ /*
+- * linux/arch/x86_64/kernel/vsyscall.c
+- *
+ * Copyright (C) 2001 Andrea Arcangeli <andrea@suse.de> SuSE
+ * Copyright 2003 Andi Kleen, SuSE Labs.
+ *
+@@ -50,12 +48,12 @@
+ ({unsigned long v; \
+ extern char __vsyscall_0; \
+ asm("" : "=r" (v) : "0" (x)); \
+- ((v - VSYSCALL_FIRST_PAGE) + __pa_symbol(&__vsyscall_0)); })
++ ((v - VSYSCALL_START) + __pa_symbol(&__vsyscall_0)); })
+
+ /*
+ * vsyscall_gtod_data contains data that is :
+ * - readonly from vsyscalls
+- * - writen by timer interrupt or systcl (/proc/sys/kernel/vsyscall64)
++ * - written by timer interrupt or systcl (/proc/sys/kernel/vsyscall64)
+ * Try to keep this structure as small as possible to avoid cache line ping pongs
+ */
+ int __vgetcpu_mode __section_vgetcpu_mode;
+@@ -66,6 +64,16 @@ struct vsyscall_gtod_data __vsyscall_gto
+ .sysctl_enabled = 1,
+ };
+
++void update_vsyscall_tz(void)
++{
++ unsigned long flags;
++
++ write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
++ /* sys_tz has changed */
++ vsyscall_gtod_data.sys_tz = sys_tz;
++ write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
++}
++
+ void update_vsyscall(struct timespec *wall_time, struct clocksource *clock)
+ {
+ unsigned long flags;
+@@ -79,8 +87,6 @@ void update_vsyscall(struct timespec *wa
+ vsyscall_gtod_data.clock.shift = clock->shift;
+ vsyscall_gtod_data.wall_time_sec = wall_time->tv_sec;
+ vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
+- vsyscall_gtod_data.sys_tz = sys_tz;
+- vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
+ vsyscall_gtod_data.wall_to_monotonic = wall_to_monotonic;
+ write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
+ }
+@@ -166,7 +172,7 @@ time_t __vsyscall(1) vtime(time_t *t)
+ if (unlikely(!__vsyscall_gtod_data.sysctl_enabled))
+ return time_syscall(t);
+
+- vgettimeofday(&tv, 0);
++ vgettimeofday(&tv, NULL);
+ result = tv.tv_sec;
+ if (t)
+ *t = result;
+@@ -260,18 +266,10 @@ out:
+ return ret;
+ }
+
+-static int vsyscall_sysctl_nostrat(ctl_table *t, int __user *name, int nlen,
+- void __user *oldval, size_t __user *oldlenp,
+- void __user *newval, size_t newlen)
+-{
+- return -ENOSYS;
+-}
+-
+ static ctl_table kernel_table2[] = {
+- { .ctl_name = 99, .procname = "vsyscall64",
++ { .procname = "vsyscall64",
+ .data = &vsyscall_gtod_data.sysctl_enabled, .maxlen = sizeof(int),
+ .mode = 0644,
+- .strategy = vsyscall_sysctl_nostrat,
+ .proc_handler = vsyscall_sysctl_change },
+ {}
+ };
+@@ -291,9 +289,9 @@ static void __cpuinit vsyscall_set_cpu(i
+ unsigned long d;
+ unsigned long node = 0;
+ #ifdef CONFIG_NUMA
+- node = cpu_to_node[cpu];
++ node = cpu_to_node(cpu);
+ #endif
+- if (cpu_has(&cpu_data[cpu], X86_FEATURE_RDTSCP))
++ if (cpu_has(&cpu_data(cpu), X86_FEATURE_RDTSCP))
+ write_rdtscp_aux((node << 12) | cpu);
+
+ /* Store cpu number in limit so that it can be loaded quickly
+Index: head-2008-12-01/arch/x86/mm/fault_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -25,6 +25,7 @@
+ #include <linux/kprobes.h>
+ #include <linux/uaccess.h>
+ #include <linux/kdebug.h>
++#include <linux/kprobes.h>
+
+ #include <asm/system.h>
+ #include <asm/desc.h>
+@@ -32,33 +33,27 @@
+
+ extern void die(const char *,struct pt_regs *,long);
+
+-static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
+-
+-int register_page_fault_notifier(struct notifier_block *nb)
++#ifdef CONFIG_KPROBES
++static inline int notify_page_fault(struct pt_regs *regs)
+ {
+- vmalloc_sync_all();
+- return atomic_notifier_chain_register(¬ify_page_fault_chain, nb);
+-}
+-EXPORT_SYMBOL_GPL(register_page_fault_notifier);
++ int ret = 0;
+
+-int unregister_page_fault_notifier(struct notifier_block *nb)
+-{
+- return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb);
+-}
+-EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
++ /* kprobe_running() needs smp_processor_id() */
++ if (!user_mode_vm(regs)) {
++ preempt_disable();
++ if (kprobe_running() && kprobe_fault_handler(regs, 14))
++ ret = 1;
++ preempt_enable();
++ }
+
+-static inline int notify_page_fault(struct pt_regs *regs, long err)
++ return ret;
++}
++#else
++static inline int notify_page_fault(struct pt_regs *regs)
+ {
+- struct die_args args = {
+- .regs = regs,
+- .str = "page fault",
+- .err = err,
+- .trapnr = 14,
+- .signr = SIGSEGV
+- };
+- return atomic_notifier_call_chain(¬ify_page_fault_chain,
+- DIE_PAGE_FAULT, &args);
++ return 0;
+ }
++#endif
+
+ /*
+ * Return EIP plus the CS segment base. The segment limit is also
+@@ -110,7 +105,7 @@ static inline unsigned long get_segment_
+ LDT and other horrors are only used in user space. */
+ if (seg & (1<<2)) {
+ /* Must lock the LDT while reading it. */
+- down(¤t->mm->context.sem);
++ mutex_lock(¤t->mm->context.lock);
+ desc = current->mm->context.ldt;
+ desc = (void *)desc + (seg & ~7);
+ } else {
+@@ -123,7 +118,7 @@ static inline unsigned long get_segment_
+ base = get_desc_base((unsigned long *)desc);
+
+ if (seg & (1<<2)) {
+- up(¤t->mm->context.sem);
++ mutex_unlock(¤t->mm->context.lock);
+ } else
+ put_cpu();
+
+@@ -244,7 +239,7 @@ static void dump_fault_path(unsigned lon
+ if (mfn_to_pfn(mfn) >= highstart_pfn)
+ return;
+ #endif
+- if (p[0] & _PAGE_PRESENT) {
++ if ((p[0] & _PAGE_PRESENT) && !(p[0] & _PAGE_PSE)) {
+ page = mfn_to_pfn(mfn) << PAGE_SHIFT;
+ p = (unsigned long *) __va(page);
+ address &= 0x001fffff;
+@@ -270,7 +265,8 @@ static void dump_fault_path(unsigned lon
+ * it's allocated already.
+ */
+ if ((machine_to_phys(page) >> PAGE_SHIFT) < max_low_pfn
+- && (page & _PAGE_PRESENT)) {
++ && (page & _PAGE_PRESENT)
++ && !(page & _PAGE_PSE)) {
+ page = machine_to_phys(page & PAGE_MASK);
+ page = ((unsigned long *) __va(page))[(address >> PAGE_SHIFT)
+ & (PTRS_PER_PTE - 1)];
+@@ -416,6 +412,11 @@ fastcall void __kprobes do_page_fault(st
+ int write, si_code;
+ int fault;
+
++ /*
++ * We can fault from pretty much anywhere, with unknown IRQ state.
++ */
++ trace_hardirqs_fixup();
++
+ /* get the address */
+ address = read_cr2();
+
+@@ -453,7 +454,7 @@ fastcall void __kprobes do_page_fault(st
+ /* Can take a spurious fault if mapping changes R/O -> R/W. */
+ if (spurious_fault(regs, address, error_code))
+ return;
+- if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
++ if (notify_page_fault(regs))
+ return;
+ /*
+ * Don't take the mm semaphore here. If we fixup a prefetch
+@@ -462,7 +463,7 @@ fastcall void __kprobes do_page_fault(st
+ goto bad_area_nosemaphore;
+ }
+
+- if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
++ if (notify_page_fault(regs))
+ return;
+
+ /* It's safe to allow irq's after cr2 has been saved and the vmalloc
+@@ -481,7 +482,7 @@ fastcall void __kprobes do_page_fault(st
+
+ /* When running in the kernel we expect faults to occur only to
+ * addresses in user space. All other faults represent errors in the
+- * kernel and should generate an OOPS. Unfortunatly, in the case of an
++ * kernel and should generate an OOPS. Unfortunately, in the case of an
+ * erroneous fault occurring in a code path which already holds mmap_sem
+ * we will deadlock attempting to validate the fault against the
+ * address space. Luckily the kernel only validly references user
+@@ -489,7 +490,7 @@ fastcall void __kprobes do_page_fault(st
+ * exceptions table.
+ *
+ * As the vast majority of faults will be valid we will only perform
+- * the source reference check when there is a possibilty of a deadlock.
++ * the source reference check when there is a possibility of a deadlock.
+ * Attempt to lock the address space, if we cannot we then validate the
+ * source. If this is invalid we can skip the address space check,
+ * thus avoiding the deadlock.
+@@ -598,8 +599,8 @@ bad_area_nosemaphore:
+ printk_ratelimit()) {
+ printk("%s%s[%d]: segfault at %08lx eip %08lx "
+ "esp %08lx error %lx\n",
+- tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
+- tsk->comm, tsk->pid, address, regs->eip,
++ task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
++ tsk->comm, task_pid_nr(tsk), address, regs->eip,
+ regs->esp, error_code);
+ }
+ tsk->thread.cr2 = address;
+@@ -664,8 +665,7 @@ no_context:
+ printk(KERN_ALERT "BUG: unable to handle kernel paging"
+ " request");
+ printk(" at virtual address %08lx\n",address);
+- printk(KERN_ALERT " printing eip:\n");
+- printk("%08lx\n", regs->eip);
++ printk(KERN_ALERT "printing eip: %08lx\n", regs->eip);
+ dump_fault_path(address);
+ }
+ tsk->thread.cr2 = address;
+@@ -681,14 +681,14 @@ no_context:
+ */
+ out_of_memory:
+ up_read(&mm->mmap_sem);
+- if (is_init(tsk)) {
++ if (is_global_init(tsk)) {
+ yield();
+ down_read(&mm->mmap_sem);
+ goto survive;
+ }
+ printk("VM: killing process %s\n", tsk->comm);
+ if (error_code & 4)
+- do_exit(SIGKILL);
++ do_group_exit(SIGKILL);
+ goto no_context;
+
+ do_sigbus:
+Index: head-2008-12-01/arch/x86/mm/fault_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -25,6 +25,7 @@
+ #include <linux/kprobes.h>
+ #include <linux/uaccess.h>
+ #include <linux/kdebug.h>
++#include <linux/kprobes.h>
+
+ #include <asm/system.h>
+ #include <asm/pgalloc.h>
+@@ -40,34 +41,27 @@
+ #define PF_RSVD (1<<3)
+ #define PF_INSTR (1<<4)
+
+-static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
+-
+-/* Hook to register for page fault notifications */
+-int register_page_fault_notifier(struct notifier_block *nb)
++#ifdef CONFIG_KPROBES
++static inline int notify_page_fault(struct pt_regs *regs)
+ {
+- vmalloc_sync_all();
+- return atomic_notifier_chain_register(¬ify_page_fault_chain, nb);
+-}
+-EXPORT_SYMBOL_GPL(register_page_fault_notifier);
++ int ret = 0;
+
+-int unregister_page_fault_notifier(struct notifier_block *nb)
+-{
+- return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb);
+-}
+-EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
++ /* kprobe_running() needs smp_processor_id() */
++ if (!user_mode(regs)) {
++ preempt_disable();
++ if (kprobe_running() && kprobe_fault_handler(regs, 14))
++ ret = 1;
++ preempt_enable();
++ }
+
+-static inline int notify_page_fault(struct pt_regs *regs, long err)
++ return ret;
++}
++#else
++static inline int notify_page_fault(struct pt_regs *regs)
+ {
+- struct die_args args = {
+- .regs = regs,
+- .str = "page fault",
+- .err = err,
+- .trapnr = 14,
+- .signr = SIGSEGV
+- };
+- return atomic_notifier_call_chain(¬ify_page_fault_chain,
+- DIE_PAGE_FAULT, &args);
++ return 0;
+ }
++#endif
+
+ /* Sometimes the CPU reports invalid exceptions on prefetch.
+ Check that here and ignore.
+@@ -175,7 +169,7 @@ void dump_pagetable(unsigned long addres
+ pmd = pmd_offset(pud, address);
+ if (bad_address(pmd)) goto bad;
+ printk("PMD %lx ", pmd_val(*pmd));
+- if (!pmd_present(*pmd)) goto ret;
++ if (!pmd_present(*pmd) || pmd_large(*pmd)) goto ret;
+
+ pte = pte_offset_kernel(pmd, address);
+ if (bad_address(pte)) goto bad;
+@@ -294,7 +288,6 @@ static int vmalloc_fault(unsigned long a
+ return 0;
+ }
+
+-static int page_fault_trace;
+ int show_unhandled_signals = 1;
+
+
+@@ -371,6 +364,11 @@ asmlinkage void __kprobes do_page_fault(
+ if (!user_mode(regs))
+ error_code &= ~PF_USER; /* means kernel */
+
++ /*
++ * We can fault from pretty much anywhere, with unknown IRQ state.
++ */
++ trace_hardirqs_fixup();
++
+ tsk = current;
+ mm = tsk->mm;
+ prefetchw(&mm->mmap_sem);
+@@ -408,7 +406,7 @@ asmlinkage void __kprobes do_page_fault(
+ /* Can take a spurious fault if mapping changes R/O -> R/W. */
+ if (spurious_fault(regs, address, error_code))
+ return;
+- if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
++ if (notify_page_fault(regs))
+ return;
+ /*
+ * Don't take the mm semaphore here. If we fixup a prefetch
+@@ -417,16 +415,12 @@ asmlinkage void __kprobes do_page_fault(
+ goto bad_area_nosemaphore;
+ }
+
+- if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
++ if (notify_page_fault(regs))
+ return;
+
+ if (likely(regs->eflags & X86_EFLAGS_IF))
+ local_irq_enable();
+
+- if (unlikely(page_fault_trace))
+- printk("pagefault rip:%lx rsp:%lx cs:%lu ss:%lu address %lx error %lx\n",
+- regs->rip,regs->rsp,regs->cs,regs->ss,address,error_code);
+-
+ if (unlikely(error_code & PF_RSVD))
+ pgtable_bad(address, regs, error_code);
+
+@@ -447,7 +441,7 @@ asmlinkage void __kprobes do_page_fault(
+ again:
+ /* When running in the kernel we expect faults to occur only to
+ * addresses in user space. All other faults represent errors in the
+- * kernel and should generate an OOPS. Unfortunatly, in the case of an
++ * kernel and should generate an OOPS. Unfortunately, in the case of an
+ * erroneous fault occurring in a code path which already holds mmap_sem
+ * we will deadlock attempting to validate the fault against the
+ * address space. Luckily the kernel only validly references user
+@@ -455,7 +449,7 @@ asmlinkage void __kprobes do_page_fault(
+ * exceptions table.
+ *
+ * As the vast majority of faults will be valid we will only perform
+- * the source reference check when there is a possibilty of a deadlock.
++ * the source reference check when there is a possibility of a deadlock.
+ * Attempt to lock the address space, if we cannot we then validate the
+ * source. If this is invalid we can skip the address space check,
+ * thus avoiding the deadlock.
+@@ -557,7 +551,7 @@ bad_area_nosemaphore:
+ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+ printk_ratelimit()) {
+ printk(
+- "%s%s[%d]: segfault at %016lx rip %016lx rsp %016lx error %lx\n",
++ "%s%s[%d]: segfault at %lx rip %lx rsp %lx error %lx\n",
+ tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
+ tsk->comm, tsk->pid, address, regs->rip,
+ regs->rsp, error_code);
+@@ -623,7 +617,7 @@ no_context:
+ */
+ out_of_memory:
+ up_read(&mm->mmap_sem);
+- if (is_init(current)) {
++ if (is_global_init(current)) {
+ yield();
+ goto again;
+ }
+@@ -690,10 +684,3 @@ void vmalloc_sync_all(void)
+ BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
+ (__START_KERNEL & PGDIR_MASK)));
+ }
+-
+-static int __init enable_pagefaulttrace(char *str)
+-{
+- page_fault_trace = 1;
+- return 1;
+-}
+-__setup("pagefaulttrace", enable_pagefaulttrace);
+Index: head-2008-12-01/arch/x86/mm/init_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -94,7 +94,14 @@ static pte_t * __init one_page_table_ini
+ #else
+ if (!(__pmd_val(*pmd) & _PAGE_PRESENT)) {
+ #endif
+- pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
++ pte_t *page_table = NULL;
++
++#ifdef CONFIG_DEBUG_PAGEALLOC
++ page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
++#endif
++ if (!page_table)
++ page_table =
++ (pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+
+ paravirt_alloc_pt(&init_mm, __pa(page_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(page_table,
+@@ -102,7 +109,7 @@ static pte_t * __init one_page_table_ini
+ set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
+ BUG_ON(page_table != pte_offset_kernel(pmd, 0));
+ }
+-
++
+ return pte_offset_kernel(pmd, 0);
+ }
+
+@@ -360,8 +367,13 @@ extern void set_highmem_pages_init(int);
+ static void __init set_highmem_pages_init(int bad_ppro)
+ {
+ int pfn;
+- for (pfn = highstart_pfn; pfn < highend_pfn; pfn++)
+- add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
++ for (pfn = highstart_pfn; pfn < highend_pfn; pfn++) {
++ /*
++ * Holes under sparsemem might not have no mem_map[]:
++ */
++ if (pfn_valid(pfn))
++ add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
++ }
+ totalram_pages += totalhigh_pages;
+ }
+ #endif /* CONFIG_FLATMEM */
+@@ -779,35 +791,18 @@ int arch_add_memory(int nid, u64 start,
+ return __add_pages(zone, start_pfn, nr_pages);
+ }
+
+-int remove_memory(u64 start, u64 size)
+-{
+- return -EINVAL;
+-}
+-EXPORT_SYMBOL_GPL(remove_memory);
+ #endif
+
+ struct kmem_cache *pmd_cache;
+
+ void __init pgtable_cache_init(void)
+ {
+- size_t pgd_size = PTRS_PER_PGD*sizeof(pgd_t);
+-
+- if (PTRS_PER_PMD > 1) {
++ if (PTRS_PER_PMD > 1)
+ pmd_cache = kmem_cache_create("pmd",
+- PTRS_PER_PMD*sizeof(pmd_t),
+- PTRS_PER_PMD*sizeof(pmd_t),
+- SLAB_PANIC,
+- pmd_ctor);
+- if (!SHARED_KERNEL_PMD) {
+- /* If we're in PAE mode and have a non-shared
+- kernel pmd, then the pgd size must be a
+- page size. This is because the pgd_list
+- links through the page structure, so there
+- can only be one pgd per page for this to
+- work. */
+- pgd_size = PAGE_SIZE;
+- }
+- }
++ PTRS_PER_PMD*sizeof(pmd_t),
++ PTRS_PER_PMD*sizeof(pmd_t),
++ SLAB_PANIC,
++ pmd_ctor);
+ }
+
+ /*
+Index: head-2008-12-01/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -767,7 +767,7 @@ static void xen_finish_init_mapping(void
+ /* Setup the direct mapping of the physical memory at PAGE_OFFSET.
+ This runs before bootmem is initialized and gets pages directly from the
+ physical memory. To access them they are temporarily mapped. */
+-void __meminit init_memory_mapping(unsigned long start, unsigned long end)
++void __init_refok init_memory_mapping(unsigned long start, unsigned long end)
+ {
+ unsigned long next;
+
+@@ -901,12 +901,6 @@ error:
+ }
+ EXPORT_SYMBOL_GPL(arch_add_memory);
+
+-int remove_memory(u64 start, u64 size)
+-{
+- return -EINVAL;
+-}
+-EXPORT_SYMBOL_GPL(remove_memory);
+-
+ #if !defined(CONFIG_ACPI_NUMA) && defined(CONFIG_NUMA)
+ int memory_add_physaddr_to_nid(u64 start)
+ {
+@@ -1175,14 +1169,6 @@ int in_gate_area_no_task(unsigned long a
+ return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END);
+ }
+
+-#ifndef CONFIG_XEN
+-void * __init alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
+-{
+- return __alloc_bootmem_core(pgdat->bdata, size,
+- SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0);
+-}
+-#endif
+-
+ const char *arch_vma_name(struct vm_area_struct *vma)
+ {
+ if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso)
+@@ -1191,3 +1177,48 @@ const char *arch_vma_name(struct vm_area
+ return "[vsyscall]";
+ return NULL;
+ }
++
++#ifdef CONFIG_SPARSEMEM_VMEMMAP
++/*
++ * Initialise the sparsemem vmemmap using huge-pages at the PMD level.
++ */
++int __meminit vmemmap_populate(struct page *start_page,
++ unsigned long size, int node)
++{
++ unsigned long addr = (unsigned long)start_page;
++ unsigned long end = (unsigned long)(start_page + size);
++ unsigned long next;
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++
++ for (; addr < end; addr = next) {
++ next = pmd_addr_end(addr, end);
++
++ pgd = vmemmap_pgd_populate(addr, node);
++ if (!pgd)
++ return -ENOMEM;
++ pud = vmemmap_pud_populate(pgd, addr, node);
++ if (!pud)
++ return -ENOMEM;
++
++ pmd = pmd_offset(pud, addr);
++ if (pmd_none(*pmd)) {
++ pte_t entry;
++ void *p = vmemmap_alloc_block(PMD_SIZE, node);
++ if (!p)
++ return -ENOMEM;
++
++ entry = pfn_pte(__pa(p) >> PAGE_SHIFT, PAGE_KERNEL);
++ mk_pte_huge(entry);
++ set_pmd(pmd, __pmd(pte_val(entry)));
++
++ printk(KERN_DEBUG " [%lx-%lx] PMD ->%p on node %d\n",
++ addr, addr + PMD_SIZE - 1, p, node);
++ } else
++ vmemmap_verify((pte_t *)pmd, node, addr, next);
++ }
++
++ return 0;
++}
++#endif
+Index: head-2008-12-01/arch/x86/mm/pageattr_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pageattr_64-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pageattr_64-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -17,9 +17,6 @@
+ #include <asm/pgalloc.h>
+ #include <asm/mmu_context.h>
+
+-LIST_HEAD(mm_unpinned);
+-DEFINE_SPINLOCK(mm_unpinned_lock);
+-
+ static void _pin_lock(struct mm_struct *mm, int lock) {
+ if (lock)
+ spin_lock(&mm->page_table_lock);
+@@ -81,8 +78,8 @@ static void _pin_lock(struct mm_struct *
+ #define PIN_BATCH 8
+ static DEFINE_PER_CPU(multicall_entry_t[PIN_BATCH], pb_mcl);
+
+-static inline unsigned int mm_walk_set_prot(void *pt, pgprot_t flags,
+- unsigned int cpu, unsigned int seq)
++static inline unsigned int pgd_walk_set_prot(void *pt, pgprot_t flags,
++ unsigned int cpu, unsigned int seq)
+ {
+ struct page *page = virt_to_page(pt);
+ unsigned long pfn = page_to_pfn(page);
+@@ -100,9 +97,9 @@ static inline unsigned int mm_walk_set_p
+ return seq;
+ }
+
+-static void mm_walk(struct mm_struct *mm, pgprot_t flags)
++static void pgd_walk(pgd_t *pgd_base, pgprot_t flags)
+ {
+- pgd_t *pgd;
++ pgd_t *pgd = pgd_base;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+@@ -110,7 +107,6 @@ static void mm_walk(struct mm_struct *mm
+ unsigned int cpu, seq;
+ multicall_entry_t *mcl;
+
+- pgd = mm->pgd;
+ cpu = get_cpu();
+
+ /*
+@@ -125,18 +121,18 @@ static void mm_walk(struct mm_struct *mm
+ continue;
+ pud = pud_offset(pgd, 0);
+ if (PTRS_PER_PUD > 1) /* not folded */
+- seq = mm_walk_set_prot(pud,flags,cpu,seq);
++ seq = pgd_walk_set_prot(pud,flags,cpu,seq);
+ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
+ if (pud_none(*pud))
+ continue;
+ pmd = pmd_offset(pud, 0);
+ if (PTRS_PER_PMD > 1) /* not folded */
+- seq = mm_walk_set_prot(pmd,flags,cpu,seq);
++ seq = pgd_walk_set_prot(pmd,flags,cpu,seq);
+ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
+ if (pmd_none(*pmd))
+ continue;
+ pte = pte_offset_kernel(pmd,0);
+- seq = mm_walk_set_prot(pte,flags,cpu,seq);
++ seq = pgd_walk_set_prot(pte,flags,cpu,seq);
+ }
+ }
+ }
+@@ -148,12 +144,12 @@ static void mm_walk(struct mm_struct *mm
+ seq = 0;
+ }
+ MULTI_update_va_mapping(mcl + seq,
+- (unsigned long)__user_pgd(mm->pgd),
+- pfn_pte(virt_to_phys(__user_pgd(mm->pgd))>>PAGE_SHIFT, flags),
++ (unsigned long)__user_pgd(pgd_base),
++ pfn_pte(virt_to_phys(__user_pgd(pgd_base))>>PAGE_SHIFT, flags),
+ 0);
+ MULTI_update_va_mapping(mcl + seq + 1,
+- (unsigned long)mm->pgd,
+- pfn_pte(virt_to_phys(mm->pgd)>>PAGE_SHIFT, flags),
++ (unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
+ UVMF_TLB_FLUSH);
+ if (unlikely(HYPERVISOR_multicall_check(mcl, seq + 2, NULL)))
+ BUG();
+@@ -161,21 +157,35 @@ static void mm_walk(struct mm_struct *mm
+ put_cpu();
+ }
+
++static void __pgd_pin(pgd_t *pgd)
++{
++ pgd_walk(pgd, PAGE_KERNEL_RO);
++ xen_pgd_pin(__pa(pgd)); /* kernel */
++ xen_pgd_pin(__pa(__user_pgd(pgd))); /* user */
++ SetPagePinned(virt_to_page(pgd));
++}
++
++static void __pgd_unpin(pgd_t *pgd)
++{
++ xen_pgd_unpin(__pa(pgd));
++ xen_pgd_unpin(__pa(__user_pgd(pgd)));
++ pgd_walk(pgd, PAGE_KERNEL);
++ ClearPagePinned(virt_to_page(pgd));
++}
++
++void pgd_test_and_unpin(pgd_t *pgd)
++{
++ if (PagePinned(virt_to_page(pgd)))
++ __pgd_unpin(pgd);
++}
++
+ void mm_pin(struct mm_struct *mm)
+ {
+ if (xen_feature(XENFEAT_writable_page_tables))
+ return;
+
+ pin_lock(mm);
+-
+- mm_walk(mm, PAGE_KERNEL_RO);
+- xen_pgd_pin(__pa(mm->pgd)); /* kernel */
+- xen_pgd_pin(__pa(__user_pgd(mm->pgd))); /* user */
+- SetPagePinned(virt_to_page(mm->pgd));
+- spin_lock(&mm_unpinned_lock);
+- list_del(&mm->context.unpinned);
+- spin_unlock(&mm_unpinned_lock);
+-
++ __pgd_pin(mm->pgd);
+ pin_unlock(mm);
+ }
+
+@@ -185,34 +195,30 @@ void mm_unpin(struct mm_struct *mm)
+ return;
+
+ pin_lock(mm);
+-
+- xen_pgd_unpin(__pa(mm->pgd));
+- xen_pgd_unpin(__pa(__user_pgd(mm->pgd)));
+- mm_walk(mm, PAGE_KERNEL);
+- ClearPagePinned(virt_to_page(mm->pgd));
+- spin_lock(&mm_unpinned_lock);
+- list_add(&mm->context.unpinned, &mm_unpinned);
+- spin_unlock(&mm_unpinned_lock);
+-
++ __pgd_unpin(mm->pgd);
+ pin_unlock(mm);
+ }
+
+ void mm_pin_all(void)
+ {
++ struct page *page;
++ unsigned long flags;
++
+ if (xen_feature(XENFEAT_writable_page_tables))
+ return;
+
+ /*
+- * Allow uninterrupted access to the mm_unpinned list. We don't
+- * actually take the mm_unpinned_lock as it is taken inside mm_pin().
++ * Allow uninterrupted access to the pgd_list. Also protects
++ * __pgd_pin() by disabling preemption.
+ * All other CPUs must be at a safe point (e.g., in stop_machine
+ * or offlined entirely).
+ */
+- preempt_disable();
+- while (!list_empty(&mm_unpinned))
+- mm_pin(list_entry(mm_unpinned.next, struct mm_struct,
+- context.unpinned));
+- preempt_enable();
++ spin_lock_irqsave(&pgd_lock, flags);
++ list_for_each_entry(page, &pgd_list, lru) {
++ if (!PagePinned(page))
++ __pgd_pin((pgd_t *)page_address(page));
++ }
++ spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+
+ void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+@@ -331,11 +337,11 @@ static struct page *split_large_page(uns
+ return base;
+ }
+
+-static void cache_flush_page(void *adr)
++void clflush_cache_range(void *adr, int size)
+ {
+ int i;
+- for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
+- asm volatile("clflush (%0)" :: "r" (adr + i));
++ for (i = 0; i < size; i += boot_cpu_data.x86_clflush_size)
++ clflush(adr+i);
+ }
+
+ static void flush_kernel_map(void *arg)
+@@ -350,7 +356,7 @@ static void flush_kernel_map(void *arg)
+ asm volatile("wbinvd" ::: "memory");
+ else list_for_each_entry(pg, l, lru) {
+ void *adr = page_address(pg);
+- cache_flush_page(adr);
++ clflush_cache_range(adr, PAGE_SIZE);
+ }
+ __flush_tlb_all();
+ }
+@@ -418,6 +424,7 @@ __change_page_attr(unsigned long address
+ split = split_large_page(address, prot, ref_prot2);
+ if (!split)
+ return -ENOMEM;
++ pgprot_val(ref_prot2) &= ~_PAGE_NX;
+ set_pte(kpte, mk_pte(split, ref_prot2));
+ kpte_page = split;
+ }
+@@ -510,9 +517,14 @@ void global_flush_tlb(void)
+ struct page *pg, *next;
+ struct list_head l;
+
+- down_read(&init_mm.mmap_sem);
++ /*
++ * Write-protect the semaphore, to exclude two contexts
++ * doing a list_replace_init() call in parallel and to
++ * exclude new additions to the deferred_pages list:
++ */
++ down_write(&init_mm.mmap_sem);
+ list_replace_init(&deferred_pages, &l);
+- up_read(&init_mm.mmap_sem);
++ up_write(&init_mm.mmap_sem);
+
+ flush_map(&l);
+
+Index: head-2008-12-01/arch/x86/mm/pgtable_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -6,6 +6,7 @@
+ #include <linux/kernel.h>
+ #include <linux/errno.h>
+ #include <linux/mm.h>
++#include <linux/nmi.h>
+ #include <linux/swap.h>
+ #include <linux/smp.h>
+ #include <linux/highmem.h>
+@@ -46,6 +47,8 @@ void show_mem(void)
+ for_each_online_pgdat(pgdat) {
+ pgdat_resize_lock(pgdat, &flags);
+ for (i = 0; i < pgdat->node_spanned_pages; ++i) {
++ if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
++ touch_nmi_watchdog();
+ page = pgdat_page_nr(pgdat, i);
+ total++;
+ if (PageHighMem(page))
+@@ -206,7 +209,7 @@ void pte_free(struct page *pte)
+ __free_page(pte);
+ }
+
+-void pmd_ctor(void *pmd, struct kmem_cache *cache, unsigned long flags)
++void pmd_ctor(struct kmem_cache *cache, void *pmd)
+ {
+ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
+ }
+Index: head-2008-12-01/arch/x86/pci/irq-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/pci/irq-xen.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/pci/irq-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -173,7 +173,7 @@ void eisa_set_level_irq(unsigned int irq
+ }
+
+ /*
+- * Common IRQ routing practice: nybbles in config space,
++ * Common IRQ routing practice: nibbles in config space,
+ * offset by some magic constant.
+ */
+ static unsigned int read_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr)
+@@ -496,6 +496,26 @@ static int pirq_amd756_set(struct pci_de
+ return 1;
+ }
+
++/*
++ * PicoPower PT86C523
++ */
++static int pirq_pico_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
++{
++ outb(0x10 + ((pirq - 1) >> 1), 0x24);
++ return ((pirq - 1) & 1) ? (inb(0x26) >> 4) : (inb(0x26) & 0xf);
++}
++
++static int pirq_pico_set(struct pci_dev *router, struct pci_dev *dev, int pirq,
++ int irq)
++{
++ unsigned int x;
++ outb(0x10 + ((pirq - 1) >> 1), 0x24);
++ x = inb(0x26);
++ x = ((pirq - 1) & 1) ? ((x & 0x0f) | (irq << 4)) : ((x & 0xf0) | (irq));
++ outb(x, 0x26);
++ return 1;
++}
++
+ #ifdef CONFIG_PCI_BIOS
+
+ static int pirq_bios_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+@@ -569,7 +589,7 @@ static __init int via_router_probe(struc
+ /* FIXME: We should move some of the quirk fixup stuff here */
+
+ /*
+- * work arounds for some buggy BIOSes
++ * workarounds for some buggy BIOSes
+ */
+ if (device == PCI_DEVICE_ID_VIA_82C586_0) {
+ switch(router->device) {
+@@ -725,6 +745,24 @@ static __init int amd_router_probe(struc
+ return 1;
+ }
+
++static __init int pico_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++{
++ switch (device) {
++ case PCI_DEVICE_ID_PICOPOWER_PT86C523:
++ r->name = "PicoPower PT86C523";
++ r->get = pirq_pico_get;
++ r->set = pirq_pico_set;
++ return 1;
++
++ case PCI_DEVICE_ID_PICOPOWER_PT86C523BBP:
++ r->name = "PicoPower PT86C523 rev. BB+";
++ r->get = pirq_pico_get;
++ r->set = pirq_pico_set;
++ return 1;
++ }
++ return 0;
++}
++
+ static __initdata struct irq_router_handler pirq_routers[] = {
+ { PCI_VENDOR_ID_INTEL, intel_router_probe },
+ { PCI_VENDOR_ID_AL, ali_router_probe },
+@@ -736,6 +774,7 @@ static __initdata struct irq_router_hand
+ { PCI_VENDOR_ID_VLSI, vlsi_router_probe },
+ { PCI_VENDOR_ID_SERVERWORKS, serverworks_router_probe },
+ { PCI_VENDOR_ID_AMD, amd_router_probe },
++ { PCI_VENDOR_ID_PICOPOWER, pico_router_probe },
+ /* Someone with docs needs to add the ATI Radeon IGP */
+ { 0, NULL }
+ };
+@@ -1014,7 +1053,7 @@ static void __init pcibios_fixup_irqs(vo
+ * Work around broken HP Pavilion Notebooks which assign USB to
+ * IRQ 9 even though it is actually wired to IRQ 11
+ */
+-static int __init fix_broken_hp_bios_irq9(struct dmi_system_id *d)
++static int __init fix_broken_hp_bios_irq9(const struct dmi_system_id *d)
+ {
+ if (!broken_hp_bios_irq9) {
+ broken_hp_bios_irq9 = 1;
+@@ -1027,7 +1066,7 @@ static int __init fix_broken_hp_bios_irq
+ * Work around broken Acer TravelMate 360 Notebooks which assign
+ * Cardbus to IRQ 11 even though it is actually wired to IRQ 10
+ */
+-static int __init fix_acer_tm360_irqrouting(struct dmi_system_id *d)
++static int __init fix_acer_tm360_irqrouting(const struct dmi_system_id *d)
+ {
+ if (!acer_tm360_irqrouting) {
+ acer_tm360_irqrouting = 1;
+Index: head-2008-12-01/drivers/acpi/processor_idle.c
+===================================================================
+--- head-2008-12-01.orig/drivers/acpi/processor_idle.c 2008-12-01 11:11:03.000000000 +0100
++++ head-2008-12-01/drivers/acpi/processor_idle.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1742,6 +1742,13 @@ int acpi_processor_cst_has_changed(struc
+ if (!pr->flags.power_setup_done)
+ return -ENODEV;
+
++ if (processor_pm_external()) {
++ acpi_processor_get_power_info(pr);
++ processor_notify_external(pr,
++ PROCESSOR_PM_CHANGE, PM_TYPE_IDLE);
++ return ret;
++ }
++
+ cpuidle_pause_and_lock();
+ cpuidle_disable_device(&pr->power.dev);
+ acpi_processor_get_power_info(pr);
+Index: head-2008-12-01/drivers/cpuidle/Kconfig
+===================================================================
+--- head-2008-12-01.orig/drivers/cpuidle/Kconfig 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/drivers/cpuidle/Kconfig 2008-12-01 11:36:55.000000000 +0100
+@@ -1,6 +1,7 @@
+
+ config CPU_IDLE
+ bool "CPU idle PM support"
++ depends on !PROCESSOR_EXTERNAL_CONTROL
+ default ACPI
+ help
+ CPU idle is a generic framework for supporting software-controlled
+Index: head-2008-12-01/drivers/pci/msi-xen.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/msi-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/drivers/pci/msi-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -264,6 +264,12 @@ static int msi_map_vector(struct pci_dev
+ return msi_map_pirq_to_vector(dev, -1, entry_nr, table_base);
+ }
+
++static void pci_intx_for_msi(struct pci_dev *dev, int enable)
++{
++ if (!(dev->dev_flags & PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG))
++ pci_intx(dev, enable);
++}
++
+ #ifdef CONFIG_PM
+ static void __pci_restore_msi_state(struct pci_dev *dev)
+ {
+@@ -276,7 +282,7 @@ static void __pci_restore_msi_state(stru
+ if (pirq < 0)
+ return;
+
+- pci_intx(dev, 0); /* disable intx */
++ pci_intx_for_msi(dev, 0);
+ msi_set_enable(dev, 0);
+ }
+
+@@ -313,7 +319,7 @@ static void __pci_restore_msix_state(str
+ }
+ spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
+
+- pci_intx(dev, 0); /* disable intx */
++ pci_intx_for_msi(dev, 0);
+ msix_set_enable(dev, 0);
+ }
+
+@@ -348,7 +354,7 @@ static int msi_capability_init(struct pc
+ return -EBUSY;
+
+ /* Set MSI enabled bits */
+- pci_intx(dev, 0); /* disable intx */
++ pci_intx_for_msi(dev, 0);
+ msi_set_enable(dev, 1);
+ dev->msi_enabled = 1;
+
+@@ -422,7 +428,7 @@ static int msix_capability_init(struct p
+ return avail;
+ }
+
+- pci_intx(dev, 0); /* disable intx */
++ pci_intx_for_msi(dev, 0);
+ msix_set_enable(dev, 1);
+ dev->msix_enabled = 1;
+
+@@ -562,7 +568,7 @@ void pci_disable_msi(struct pci_dev* dev
+
+ /* Disable MSI mode */
+ msi_set_enable(dev, 0);
+- pci_intx(dev, 1); /* enable intx */
++ pci_intx_for_msi(dev, 1);
+ dev->msi_enabled = 0;
+ }
+ EXPORT_SYMBOL(pci_disable_msi);
+@@ -701,7 +707,7 @@ void pci_disable_msix(struct pci_dev* de
+
+ /* Disable MSI mode */
+ msix_set_enable(dev, 0);
+- pci_intx(dev, 1); /* enable intx */
++ pci_intx_for_msi(dev, 1);
+ dev->msix_enabled = 0;
+ }
+ EXPORT_SYMBOL(pci_disable_msix);
+Index: head-2008-12-01/drivers/xen/blkback/blkback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkback/blkback.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkback/blkback.c 2008-12-01 11:36:55.000000000 +0100
+@@ -269,13 +269,10 @@ static void __end_block_io_op(pending_re
+ }
+ }
+
+-static int end_block_io_op(struct bio *bio, unsigned int done, int error)
++static void end_block_io_op(struct bio *bio, int error)
+ {
+- if (bio->bi_size != 0)
+- return 1;
+ __end_block_io_op(bio->bi_private, error);
+ bio_put(bio);
+- return error;
+ }
+
+
+Index: head-2008-12-01/drivers/xen/blkfront/blkfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blkfront/blkfront.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/drivers/xen/blkfront/blkfront.c 2008-12-01 11:36:55.000000000 +0100
+@@ -587,9 +587,8 @@ static int blkif_queue_request(struct re
+ struct blkfront_info *info = req->rq_disk->private_data;
+ unsigned long buffer_mfn;
+ blkif_request_t *ring_req;
+- struct bio *bio;
+ struct bio_vec *bvec;
+- int idx;
++ struct req_iterator iter;
+ unsigned long id;
+ unsigned int fsect, lsect;
+ int ref;
+@@ -623,34 +622,32 @@ static int blkif_queue_request(struct re
+ ring_req->operation = BLKIF_OP_WRITE_BARRIER;
+
+ ring_req->nr_segments = 0;
+- rq_for_each_bio (bio, req) {
+- bio_for_each_segment (bvec, bio, idx) {
+- BUG_ON(ring_req->nr_segments
+- == BLKIF_MAX_SEGMENTS_PER_REQUEST);
+- buffer_mfn = page_to_phys(bvec->bv_page) >> PAGE_SHIFT;
+- fsect = bvec->bv_offset >> 9;
+- lsect = fsect + (bvec->bv_len >> 9) - 1;
+- /* install a grant reference. */
+- ref = gnttab_claim_grant_reference(&gref_head);
+- BUG_ON(ref == -ENOSPC);
++ rq_for_each_segment(bvec, req, iter) {
++ BUG_ON(ring_req->nr_segments
++ == BLKIF_MAX_SEGMENTS_PER_REQUEST);
++ buffer_mfn = page_to_phys(bvec->bv_page) >> PAGE_SHIFT;
++ fsect = bvec->bv_offset >> 9;
++ lsect = fsect + (bvec->bv_len >> 9) - 1;
++ /* install a grant reference. */
++ ref = gnttab_claim_grant_reference(&gref_head);
++ BUG_ON(ref == -ENOSPC);
++
++ gnttab_grant_foreign_access_ref(
++ ref,
++ info->xbdev->otherend_id,
++ buffer_mfn,
++ rq_data_dir(req) ? GTF_readonly : 0 );
++
++ info->shadow[id].frame[ring_req->nr_segments] =
++ mfn_to_pfn(buffer_mfn);
++
++ ring_req->seg[ring_req->nr_segments] =
++ (struct blkif_request_segment) {
++ .gref = ref,
++ .first_sect = fsect,
++ .last_sect = lsect };
+
+- gnttab_grant_foreign_access_ref(
+- ref,
+- info->xbdev->otherend_id,
+- buffer_mfn,
+- rq_data_dir(req) ? GTF_readonly : 0 );
+-
+- info->shadow[id].frame[ring_req->nr_segments] =
+- mfn_to_pfn(buffer_mfn);
+-
+- ring_req->seg[ring_req->nr_segments] =
+- (struct blkif_request_segment) {
+- .gref = ref,
+- .first_sect = fsect,
+- .last_sect = lsect };
+-
+- ring_req->nr_segments++;
+- }
++ ring_req->nr_segments++;
+ }
+
+ info->ring.req_prod_pvt++;
+Index: head-2008-12-01/drivers/xen/core/machine_kexec.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/machine_kexec.c 2008-10-13 13:43:45.000000000 +0200
++++ head-2008-12-01/drivers/xen/core/machine_kexec.c 2008-12-01 11:36:55.000000000 +0100
+@@ -29,6 +29,10 @@ void __init xen_machine_kexec_setup_reso
+ int k = 0;
+ int rc;
+
++ if (strstr(boot_command_line, "crashkernel="))
++ printk(KERN_WARNING "Ignoring crashkernel command line, "
++ "parameter will be supplied by xen\n");
++
+ if (!is_initial_xendomain())
+ return;
+
+Index: head-2008-12-01/drivers/xen/core/smpboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/smpboot.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/smpboot.c 2008-12-01 11:36:55.000000000 +0100
+@@ -45,8 +45,8 @@ cpumask_t cpu_possible_map;
+ EXPORT_SYMBOL(cpu_possible_map);
+ cpumask_t cpu_initialized_map;
+
+-struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
+-EXPORT_SYMBOL(cpu_data);
++DEFINE_PER_CPU(struct cpuinfo_x86, cpu_info);
++EXPORT_PER_CPU_SYMBOL(cpu_info);
+
+ #ifdef CONFIG_HOTPLUG_CPU
+ DEFINE_PER_CPU(int, cpu_state) = { 0 };
+@@ -59,13 +59,13 @@ static char callfunc_name[NR_CPUS][15];
+
+ u8 cpu_2_logical_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
+
+-cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
+-cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned;
+-EXPORT_SYMBOL(cpu_core_map);
++DEFINE_PER_CPU(cpumask_t, cpu_sibling_map);
++DEFINE_PER_CPU(cpumask_t, cpu_core_map);
++EXPORT_PER_CPU_SYMBOL(cpu_core_map);
+
+ #if defined(__i386__)
+-u8 x86_cpu_to_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = 0xff };
+-EXPORT_SYMBOL(x86_cpu_to_apicid);
++DEFINE_PER_CPU(u8, x86_cpu_to_apicid) = BAD_APICID;
++EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
+ #endif
+
+ void __init prefill_possible_map(void)
+@@ -90,25 +90,25 @@ void __init smp_alloc_memory(void)
+ static inline void
+ set_cpu_sibling_map(unsigned int cpu)
+ {
+- cpu_data[cpu].phys_proc_id = cpu;
+- cpu_data[cpu].cpu_core_id = 0;
++ cpu_data(cpu).phys_proc_id = cpu;
++ cpu_data(cpu).cpu_core_id = 0;
+
+- cpu_sibling_map[cpu] = cpumask_of_cpu(cpu);
+- cpu_core_map[cpu] = cpumask_of_cpu(cpu);
++ per_cpu(cpu_sibling_map, cpu) = cpumask_of_cpu(cpu);
++ per_cpu(cpu_core_map, cpu) = cpumask_of_cpu(cpu);
+
+- cpu_data[cpu].booted_cores = 1;
++ cpu_data(cpu).booted_cores = 1;
+ }
+
+ static void
+ remove_siblinginfo(unsigned int cpu)
+ {
+- cpu_data[cpu].phys_proc_id = BAD_APICID;
+- cpu_data[cpu].cpu_core_id = BAD_APICID;
++ cpu_data(cpu).phys_proc_id = BAD_APICID;
++ cpu_data(cpu).cpu_core_id = BAD_APICID;
+
+- cpus_clear(cpu_sibling_map[cpu]);
+- cpus_clear(cpu_core_map[cpu]);
++ cpus_clear(per_cpu(cpu_sibling_map, cpu));
++ cpus_clear(per_cpu(cpu_core_map, cpu));
+
+- cpu_data[cpu].booted_cores = 0;
++ cpu_data(cpu).booted_cores = 0;
+ }
+
+ static int __cpuinit xen_smp_intr_init(unsigned int cpu)
+@@ -167,9 +167,9 @@ void __cpuinit cpu_bringup(void)
+ {
+ cpu_init();
+ #ifdef __i386__
+- identify_secondary_cpu(cpu_data + smp_processor_id());
++ identify_secondary_cpu(¤t_cpu_data);
+ #else
+- identify_cpu(cpu_data + smp_processor_id());
++ identify_cpu(¤t_cpu_data);
+ #endif
+ touch_softlockup_watchdog();
+ preempt_disable();
+@@ -270,16 +270,16 @@ void __init smp_prepare_cpus(unsigned in
+ if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, 0, &cpu_id) == 0)
+ apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id);
+ boot_cpu_data.apicid = apicid;
+- cpu_data[0] = boot_cpu_data;
++ cpu_data(0) = boot_cpu_data;
+
+ cpu_2_logical_apicid[0] = apicid;
+- x86_cpu_to_apicid[0] = apicid;
++ per_cpu(x86_cpu_to_apicid, 0) = apicid;
+
+ current_thread_info()->cpu = 0;
+
+ for (cpu = 0; cpu < NR_CPUS; cpu++) {
+- cpus_clear(cpu_sibling_map[cpu]);
+- cpus_clear(cpu_core_map[cpu]);
++ cpus_clear(per_cpu(cpu_sibling_map, cpu));
++ cpus_clear(per_cpu(cpu_core_map, cpu));
+ }
+
+ set_cpu_sibling_map(0);
+@@ -324,11 +324,12 @@ void __init smp_prepare_cpus(unsigned in
+ apicid = cpu;
+ if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, cpu, &cpu_id) == 0)
+ apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id);
+- cpu_data[cpu] = boot_cpu_data;
+- cpu_data[cpu].apicid = apicid;
++ cpu_data(cpu) = boot_cpu_data;
++ cpu_data(cpu).cpu_index = cpu;
++ cpu_data(cpu).apicid = apicid;
+
+ cpu_2_logical_apicid[cpu] = apicid;
+- x86_cpu_to_apicid[cpu] = apicid;
++ per_cpu(x86_cpu_to_apicid, cpu) = apicid;
+
+ #ifdef __x86_64__
+ cpu_pda(cpu)->pcurrent = idle;
+Index: head-2008-12-01/drivers/xen/netback/loopback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/loopback.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/loopback.c 2008-12-01 11:36:55.000000000 +0100
+@@ -285,9 +285,9 @@ static void __exit clean_loopback(int i)
+ char dev_name[IFNAMSIZ];
+
+ sprintf(dev_name, "vif0.%d", i);
+- dev1 = dev_get_by_name(dev_name);
++ dev1 = dev_get_by_name(&init_net, dev_name);
+ sprintf(dev_name, "veth%d", i);
+- dev2 = dev_get_by_name(dev_name);
++ dev2 = dev_get_by_name(&init_net, dev_name);
+ if (dev1 && dev2) {
+ unregister_netdev(dev2);
+ unregister_netdev(dev1);
+Index: head-2008-12-01/drivers/xen/netback/netback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/netback.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/netback.c 2008-12-01 11:36:55.000000000 +0100
+@@ -334,8 +334,8 @@ static void xen_network_done_notify(void
+ {
+ static struct net_device *eth0_dev = NULL;
+ if (unlikely(eth0_dev == NULL))
+- eth0_dev = __dev_get_by_name("eth0");
+- netif_rx_schedule(eth0_dev);
++ eth0_dev = __dev_get_by_name(&init_net, "eth0");
++ netif_rx_schedule(eth0_dev, ???);
+ }
+ /*
+ * Add following to poll() function in NAPI driver (Tigon3 is example):
+Index: head-2008-12-01/drivers/xen/netback/xenbus.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/xenbus.c 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/xenbus.c 2008-12-01 11:36:55.000000000 +0100
+@@ -149,12 +149,10 @@ fail:
+ * and vif variables to the environment, for the benefit of the vif-* hotplug
+ * scripts.
+ */
+-static int netback_uevent(struct xenbus_device *xdev, char **envp,
+- int num_envp, char *buffer, int buffer_size)
++static int netback_uevent(struct xenbus_device *xdev, struct kobj_uevent_env *env)
+ {
+ struct backend_info *be = xdev->dev.driver_data;
+ netif_t *netif = be->netif;
+- int i = 0, length = 0;
+ char *val;
+
+ DPRINTK("netback_uevent");
+@@ -166,15 +164,11 @@ static int netback_uevent(struct xenbus_
+ return err;
+ }
+ else {
+- add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
+- &length, "script=%s", val);
++ add_uevent_var(env, "script=%s", val);
+ kfree(val);
+ }
+
+- add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+- "vif=%s", netif->dev->name);
+-
+- envp[i] = NULL;
++ add_uevent_var(env, "vif=%s", netif->dev->name);
+
+ return 0;
+ }
+Index: head-2008-12-01/drivers/xen/netfront/accel.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netfront/accel.c 2008-08-07 12:44:36.000000000 +0200
++++ head-2008-12-01/drivers/xen/netfront/accel.c 2008-12-01 11:36:55.000000000 +0100
+@@ -325,13 +325,13 @@ accelerator_set_vif_state_hooks(struct n
+ DPRINTK("%p\n",vif_state);
+
+ /* Make sure there are no data path operations going on */
+- netif_poll_disable(vif_state->np->netdev);
++ napi_disable(&vif_state->np->napi);
+ netif_tx_lock_bh(vif_state->np->netdev);
+
+ vif_state->hooks = vif_state->np->accelerator->hooks;
+
+ netif_tx_unlock_bh(vif_state->np->netdev);
+- netif_poll_enable(vif_state->np->netdev);
++ napi_enable(&vif_state->np->napi);
+ }
+
+
+@@ -509,7 +509,7 @@ accelerator_remove_single_hook(struct ne
+ struct netfront_accel_vif_state *vif_state)
+ {
+ /* Make sure there are no data path operations going on */
+- netif_poll_disable(vif_state->np->netdev);
++ napi_disable(&vif_state->np->napi);
+ netif_tx_lock_bh(vif_state->np->netdev);
+
+ /*
+@@ -521,7 +521,7 @@ accelerator_remove_single_hook(struct ne
+ vif_state->hooks = NULL;
+
+ netif_tx_unlock_bh(vif_state->np->netdev);
+- netif_poll_enable(vif_state->np->netdev);
++ napi_enable(&vif_state->np->napi);
+ }
+
+
+Index: head-2008-12-01/drivers/xen/netfront/netfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netfront/netfront.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/drivers/xen/netfront/netfront.c 2008-12-01 11:36:55.000000000 +0100
+@@ -626,6 +626,7 @@ static int network_open(struct net_devic
+ struct netfront_info *np = netdev_priv(dev);
+
+ memset(&np->stats, 0, sizeof(np->stats));
++ napi_enable(&np->napi);
+
+ spin_lock_bh(&np->rx_lock);
+ if (netfront_carrier_ok(np)) {
+@@ -634,7 +635,7 @@ static int network_open(struct net_devic
+ if (RING_HAS_UNCONSUMED_RESPONSES(&np->rx)){
+ netfront_accelerator_call_stop_napi_irq(np, dev);
+
+- netif_rx_schedule(dev);
++ netif_rx_schedule(dev, &np->napi);
+ }
+ }
+ spin_unlock_bh(&np->rx_lock);
+@@ -706,7 +707,7 @@ static void rx_refill_timeout(unsigned l
+
+ netfront_accelerator_call_stop_napi_irq(np, dev);
+
+- netif_rx_schedule(dev);
++ netif_rx_schedule(dev, &np->napi);
+ }
+
+ static void network_alloc_rx_buffers(struct net_device *dev)
+@@ -1063,7 +1064,7 @@ static irqreturn_t netif_int(int irq, vo
+ if (RING_HAS_UNCONSUMED_RESPONSES(&np->rx)) {
+ netfront_accelerator_call_stop_napi_irq(np, dev);
+
+- netif_rx_schedule(dev);
++ netif_rx_schedule(dev, &np->napi);
+ dev->last_rx = jiffies;
+ }
+ }
+@@ -1316,16 +1317,17 @@ static int xennet_set_skb_gso(struct sk_
+ #endif
+ }
+
+-static int netif_poll(struct net_device *dev, int *pbudget)
++static int netif_poll(struct napi_struct *napi, int budget)
+ {
+- struct netfront_info *np = netdev_priv(dev);
++ struct netfront_info *np = container_of(napi, struct netfront_info, napi);
++ struct net_device *dev = np->netdev;
+ struct sk_buff *skb;
+ struct netfront_rx_info rinfo;
+ struct netif_rx_response *rx = &rinfo.rx;
+ struct netif_extra_info *extras = rinfo.extras;
+ RING_IDX i, rp;
+ struct multicall_entry *mcl;
+- int work_done, budget, more_to_do = 1, accel_more_to_do = 1;
++ int work_done, more_to_do = 1, accel_more_to_do = 1;
+ struct sk_buff_head rxq;
+ struct sk_buff_head errq;
+ struct sk_buff_head tmpq;
+@@ -1345,8 +1347,6 @@ static int netif_poll(struct net_device
+ skb_queue_head_init(&errq);
+ skb_queue_head_init(&tmpq);
+
+- if ((budget = *pbudget) > dev->quota)
+- budget = dev->quota;
+ rp = np->rx.sring->rsp_prod;
+ rmb(); /* Ensure we see queued responses up to 'rp'. */
+
+@@ -1508,9 +1508,6 @@ err:
+ accel_more_to_do = 0;
+ }
+
+- *pbudget -= work_done;
+- dev->quota -= work_done;
+-
+ if (work_done < budget) {
+ local_irq_save(flags);
+
+@@ -1527,14 +1524,14 @@ err:
+ }
+
+ if (!more_to_do && !accel_more_to_do)
+- __netif_rx_complete(dev);
++ __netif_rx_complete(dev, napi);
+
+ local_irq_restore(flags);
+ }
+
+ spin_unlock(&np->rx_lock);
+
+- return more_to_do | accel_more_to_do;
++ return work_done;
+ }
+
+ static void netif_release_tx_bufs(struct netfront_info *np)
+@@ -1681,6 +1678,7 @@ static int network_close(struct net_devi
+ {
+ struct netfront_info *np = netdev_priv(dev);
+ netif_stop_queue(np->netdev);
++ napi_disable(&np->napi);
+ return 0;
+ }
+
+@@ -2088,16 +2086,14 @@ static struct net_device * __devinit cre
+ netdev->hard_start_xmit = network_start_xmit;
+ netdev->stop = network_close;
+ netdev->get_stats = network_get_stats;
+- netdev->poll = netif_poll;
++ netif_napi_add(netdev, &np->napi, netif_poll, 64);
+ netdev->set_multicast_list = network_set_multicast_list;
+ netdev->uninit = netif_uninit;
+ netdev->set_mac_address = xennet_set_mac_address;
+ netdev->change_mtu = xennet_change_mtu;
+- netdev->weight = 64;
+ netdev->features = NETIF_F_IP_CSUM;
+
+ SET_ETHTOOL_OPS(netdev, &network_ethtool_ops);
+- SET_MODULE_OWNER(netdev);
+ SET_NETDEV_DEV(netdev, &dev->dev);
+
+ np->netdev = netdev;
+Index: head-2008-12-01/drivers/xen/netfront/netfront.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netfront/netfront.h 2008-01-07 13:19:18.000000000 +0100
++++ head-2008-12-01/drivers/xen/netfront/netfront.h 2008-12-01 11:36:55.000000000 +0100
+@@ -157,6 +157,8 @@ struct netfront_info {
+ spinlock_t tx_lock;
+ spinlock_t rx_lock;
+
++ struct napi_struct napi;
++
+ unsigned int irq;
+ unsigned int copying_receiver;
+ unsigned int carrier;
+Index: head-2008-12-01/drivers/xen/pciback/Makefile
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pciback/Makefile 2008-07-21 11:00:33.000000000 +0200
++++ head-2008-12-01/drivers/xen/pciback/Makefile 2008-12-01 11:36:55.000000000 +0100
+@@ -12,6 +12,4 @@ pciback-$(CONFIG_XEN_PCIDEV_BACKEND_SLOT
+ pciback-$(CONFIG_XEN_PCIDEV_BACKEND_PASS) += passthrough.o
+ pciback-$(CONFIG_XEN_PCIDEV_BACKEND_CONTROLLER) += controller.o
+
+-ifeq ($(CONFIG_XEN_PCIDEV_BE_DEBUG),y)
+-EXTRA_CFLAGS += -DDEBUG
+-endif
++ccflags-$(CONFIG_XEN_PCIDEV_BE_DEBUG) += -DDEBUG
+Index: head-2008-12-01/drivers/xen/pcifront/Makefile
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/pcifront/Makefile 2007-06-12 13:13:45.000000000 +0200
++++ head-2008-12-01/drivers/xen/pcifront/Makefile 2008-12-01 11:36:55.000000000 +0100
+@@ -2,6 +2,4 @@ obj-y += pcifront.o
+
+ pcifront-y := pci_op.o xenbus.o pci.o
+
+-ifeq ($(CONFIG_XEN_PCIDEV_FE_DEBUG),y)
+-EXTRA_CFLAGS += -DDEBUG
+-endif
++ccflags-$(CONFIG_XEN_PCIDEV_FE_DEBUG) += -DDEBUG
+Index: head-2008-12-01/drivers/xen/scsiback/emulate.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsiback/emulate.c 2008-08-07 12:44:36.000000000 +0200
++++ head-2008-12-01/drivers/xen/scsiback/emulate.c 2008-12-01 11:36:55.000000000 +0100
+@@ -104,9 +104,10 @@ static void resp_not_supported_cmd(pendi
+ }
+
+
+-static int __copy_to_sg(struct scatterlist *sg, unsigned int nr_sg,
++static int __copy_to_sg(struct scatterlist *sgl, unsigned int nr_sg,
+ void *buf, unsigned int buflen)
+ {
++ struct scatterlist *sg;
+ void *from = buf;
+ void *to;
+ unsigned int from_rest = buflen;
+@@ -115,8 +116,8 @@ static int __copy_to_sg(struct scatterli
+ unsigned int i;
+ unsigned long pfn;
+
+- for (i = 0; i < nr_sg; i++) {
+- if (sg->page == NULL) {
++ for_each_sg (sgl, sg, nr_sg, i) {
++ if (sg_page(sg) == NULL) {
+ printk(KERN_WARNING "%s: inconsistent length field in "
+ "scatterlist\n", __FUNCTION__);
+ return -ENOMEM;
+@@ -125,7 +126,7 @@ static int __copy_to_sg(struct scatterli
+ to_capa = sg->length;
+ copy_size = min_t(unsigned int, to_capa, from_rest);
+
+- pfn = page_to_pfn(sg->page);
++ pfn = page_to_pfn(sg_page(sg));
+ to = pfn_to_kaddr(pfn) + (sg->offset);
+ memcpy(to, from, copy_size);
+
+@@ -134,7 +135,6 @@ static int __copy_to_sg(struct scatterli
+ return 0;
+ }
+
+- sg++;
+ from += copy_size;
+ }
+
+@@ -143,9 +143,10 @@ static int __copy_to_sg(struct scatterli
+ return -ENOMEM;
+ }
+
+-static int __copy_from_sg(struct scatterlist *sg, unsigned int nr_sg,
++static int __copy_from_sg(struct scatterlist *sgl, unsigned int nr_sg,
+ void *buf, unsigned int buflen)
+ {
++ struct scatterlist *sg;
+ void *from;
+ void *to = buf;
+ unsigned int from_rest;
+@@ -154,8 +155,8 @@ static int __copy_from_sg(struct scatter
+ unsigned int i;
+ unsigned long pfn;
+
+- for (i = 0; i < nr_sg; i++) {
+- if (sg->page == NULL) {
++ for_each_sg (sgl, sg, nr_sg, i) {
++ if (sg_page(sg) == NULL) {
+ printk(KERN_WARNING "%s: inconsistent length field in "
+ "scatterlist\n", __FUNCTION__);
+ return -ENOMEM;
+@@ -170,13 +171,11 @@ static int __copy_from_sg(struct scatter
+ }
+ copy_size = from_rest;
+
+- pfn = page_to_pfn(sg->page);
++ pfn = page_to_pfn(sg_page(sg));
+ from = pfn_to_kaddr(pfn) + (sg->offset);
+ memcpy(to, from, copy_size);
+
+ to_capa -= copy_size;
+-
+- sg++;
+ to += copy_size;
+ }
+
+Index: head-2008-12-01/drivers/xen/scsiback/scsiback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsiback/scsiback.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsiback/scsiback.c 2008-12-01 11:36:55.000000000 +0100
+@@ -247,6 +247,8 @@ static int scsiback_gnttab_data_map(vscs
+ write = (data_dir == DMA_TO_DEVICE);
+
+ if (nr_segments) {
++ struct scatterlist *sg;
++
+ /* free of (sgl) in fast_flush_area()*/
+ pending_req->sgl = kmalloc(sizeof(struct scatterlist) * nr_segments,
+ GFP_KERNEL);
+@@ -255,6 +257,8 @@ static int scsiback_gnttab_data_map(vscs
+ return -ENOMEM;
+ }
+
++ sg_init_table(pending_req->sgl, nr_segments);
++
+ for (i = 0; i < nr_segments; i++) {
+ flags = GNTMAP_host_map;
+ if (write)
+@@ -267,7 +271,7 @@ static int scsiback_gnttab_data_map(vscs
+ err = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map, nr_segments);
+ BUG_ON(err);
+
+- for (i = 0; i < nr_segments; i++) {
++ for_each_sg (pending_req->sgl, sg, nr_segments, i) {
+ if (unlikely(map[i].status != 0)) {
+ printk(KERN_ERR "scsiback: invalid buffer -- could not remap it\n");
+ map[i].handle = SCSIBACK_INVALID_HANDLE;
+@@ -283,15 +287,15 @@ static int scsiback_gnttab_data_map(vscs
+ pending_req, i)) >> PAGE_SHIFT,
+ FOREIGN_FRAME(map[i].dev_bus_addr >> PAGE_SHIFT));
+
+- pending_req->sgl[i].page = virt_to_page(vaddr(pending_req, i));
+- pending_req->sgl[i].offset = ring_req->seg[i].offset;
+- pending_req->sgl[i].length = ring_req->seg[i].length;
+- data_len += pending_req->sgl[i].length;
++ sg_set_page(sg, virt_to_page(vaddr(pending_req, i)),
++ ring_req->seg[i].length,
++ ring_req->seg[i].offset);
++ data_len += sg->length;
+
+ barrier();
+- if (pending_req->sgl[i].offset >= PAGE_SIZE ||
+- pending_req->sgl[i].length > PAGE_SIZE ||
+- pending_req->sgl[i].offset + pending_req->sgl[i].length > PAGE_SIZE)
++ if (sg->offset >= PAGE_SIZE ||
++ sg->length > PAGE_SIZE ||
++ sg->offset + sg->length > PAGE_SIZE)
+ err |= 1;
+
+ }
+@@ -320,27 +324,14 @@ static int scsiback_merge_bio(struct req
+
+ blk_queue_bounce(q, &bio);
+
+- if (!rq->bio)
+- blk_rq_bio_prep(q, rq, bio);
+- else if (!ll_back_merge_fn(q, rq, bio))
+- return -EINVAL;
+- else {
+- rq->biotail->bi_next = bio;
+- rq->biotail = bio;
+- }
+-
+- return 0;
++ return blk_rq_append_bio(q, rq, bio);
+ }
+
+
+ /* quoted scsi_lib.c/scsi_bi_endio */
+-static int scsiback_bi_endio(struct bio *bio, unsigned int bytes_done, int error)
++static void scsiback_bi_endio(struct bio *bio, int error)
+ {
+- if (bio->bi_size)
+- return 1;
+-
+ bio_put(bio);
+- return 0;
+ }
+
+
+@@ -351,16 +342,16 @@ static int request_map_sg(struct request
+ struct request_queue *q = rq->q;
+ int nr_pages;
+ unsigned int nsegs = count;
+-
+ unsigned int data_len = 0, len, bytes, off;
++ struct scatterlist *sg;
+ struct page *page;
+ struct bio *bio = NULL;
+ int i, err, nr_vecs = 0;
+
+- for (i = 0; i < nsegs; i++) {
+- page = pending_req->sgl[i].page;
+- off = (unsigned int)pending_req->sgl[i].offset;
+- len = (unsigned int)pending_req->sgl[i].length;
++ for_each_sg (pending_req->sgl, sg, nsegs, i) {
++ page = sg_page(sg);
++ off = sg->offset;
++ len = sg->length;
+ data_len += len;
+
+ nr_pages = (len + off + PAGE_SIZE - 1) >> PAGE_SHIFT;
+@@ -388,7 +379,7 @@ static int request_map_sg(struct request
+ if (bio->bi_vcnt >= nr_vecs) {
+ err = scsiback_merge_bio(rq, bio);
+ if (err) {
+- bio_endio(bio, bio->bi_size, 0);
++ bio_endio(bio, 0);
+ goto free_bios;
+ }
+ bio = NULL;
+@@ -411,7 +402,7 @@ free_bios:
+ /*
+ * call endio instead of bio_put incase it was bounced
+ */
+- bio_endio(bio, bio->bi_size, 0);
++ bio_endio(bio, 0);
+ }
+
+ return err;
+Index: head-2008-12-01/drivers/xen/scsifront/scsifront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/scsifront/scsifront.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/drivers/xen/scsifront/scsifront.c 2008-12-01 11:36:55.000000000 +0100
+@@ -246,11 +246,10 @@ static int map_data_for_request(struct v
+ {
+ grant_ref_t gref_head;
+ struct page *page;
+- int err, i, ref, ref_cnt = 0;
++ int err, ref, ref_cnt = 0;
+ int write = (sc->sc_data_direction == DMA_TO_DEVICE);
+- int nr_pages, off, len, bytes;
++ unsigned int i, nr_pages, off, len, bytes;
+ unsigned long buffer_pfn;
+- unsigned int data_len = 0;
+
+ if (sc->sc_data_direction == DMA_NONE)
+ return 0;
+@@ -263,25 +262,31 @@ static int map_data_for_request(struct v
+
+ if (sc->use_sg) {
+ /* quoted scsi_lib.c/scsi_req_map_sg . */
+- struct scatterlist *sg = (struct scatterlist *)sc->request_buffer;
+- nr_pages = (sc->request_bufflen + sg[0].offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
++ struct scatterlist *sg, *sgl = (struct scatterlist *)sc->request_buffer;
++ unsigned int data_len = sc->request_bufflen;
+
++ nr_pages = (sc->request_bufflen + sgl->offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ if (nr_pages > VSCSIIF_SG_TABLESIZE) {
+ printk(KERN_ERR "scsifront: Unable to map request_buffer for command!\n");
+ ref_cnt = (-E2BIG);
+ goto big_to_sg;
+ }
+
+- for (i = 0; i < sc->use_sg; i++) {
+- page = sg[i].page;
+- off = sg[i].offset;
+- len = sg[i].length;
+- data_len += len;
++ for_each_sg (sgl, sg, sc->use_sg, i) {
++ page = sg_page(sg);
++ off = sg->offset;
++ len = sg->length;
+
+ buffer_pfn = page_to_phys(page) >> PAGE_SHIFT;
+
+- while (len > 0) {
++ while (len > 0 && data_len > 0) {
++ /*
++ * sg sends a scatterlist that is larger than
++ * the data_len it wants transferred for certain
++ * IO sizes
++ */
+ bytes = min_t(unsigned int, len, PAGE_SIZE - off);
++ bytes = min(bytes, data_len);
+
+ ref = gnttab_claim_grant_reference(&gref_head);
+ BUG_ON(ref == -ENOSPC);
+@@ -296,6 +301,7 @@ static int map_data_for_request(struct v
+
+ buffer_pfn++;
+ len -= bytes;
++ data_len -= bytes;
+ off = 0;
+ ref_cnt++;
+ }
+Index: head-2008-12-01/drivers/xen/sfc_netback/accel_fwd.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netback/accel_fwd.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netback/accel_fwd.c 2008-12-01 11:36:55.000000000 +0100
+@@ -181,10 +181,11 @@ int netback_accel_fwd_add(const __u8 *ma
+ unsigned long flags;
+ cuckoo_hash_mac_key key = cuckoo_mac_to_key(mac);
+ struct port_fwd *fwd_set = (struct port_fwd *)fwd_priv;
++ DECLARE_MAC_BUF(buf);
+
+ BUG_ON(fwd_priv == NULL);
+
+- DPRINTK("Adding mac " MAC_FMT "\n", MAC_ARG(mac));
++ DPRINTK("Adding mac %s\n", print_mac(buf, mac));
+
+ spin_lock_irqsave(&fwd_set->fwd_lock, flags);
+
+@@ -199,8 +200,8 @@ int netback_accel_fwd_add(const __u8 *ma
+ if (cuckoo_hash_lookup(&fwd_set->fwd_hash_table,
+ (cuckoo_hash_key *)(&key), &rc) != 0) {
+ spin_unlock_irqrestore(&fwd_set->fwd_lock, flags);
+- EPRINTK("MAC address " MAC_FMT " already accelerated.\n",
+- MAC_ARG(mac));
++ EPRINTK("MAC address %s already accelerated.\n",
++ print_mac(buf, mac));
+ return -EEXIST;
+ }
+
+@@ -235,8 +236,9 @@ void netback_accel_fwd_remove(const __u8
+ unsigned long flags;
+ cuckoo_hash_mac_key key = cuckoo_mac_to_key(mac);
+ struct port_fwd *fwd_set = (struct port_fwd *)fwd_priv;
++ DECLARE_MAC_BUF(buf);
+
+- DPRINTK("Removing mac " MAC_FMT "\n", MAC_ARG(mac));
++ DPRINTK("Removing mac %s\n", print_mac(buf, mac));
+
+ BUG_ON(fwd_priv == NULL);
+
+@@ -394,14 +396,16 @@ void netback_accel_tx_packet(struct sk_b
+
+ if (is_broadcast_ether_addr(skb_mac_header(skb))
+ && packet_is_arp_reply(skb)) {
++ DECLARE_MAC_BUF(buf);
++
+ /*
+ * update our fast path forwarding to reflect this
+ * gratuitous ARP
+ */
+ mac = skb_mac_header(skb)+ETH_ALEN;
+
+- DPRINTK("%s: found gratuitous ARP for " MAC_FMT "\n",
+- __FUNCTION__, MAC_ARG(mac));
++ DPRINTK("%s: found gratuitous ARP for %s\n",
++ __FUNCTION__, print_mac(buf, mac));
+
+ spin_lock_irqsave(&fwd_set->fwd_lock, flags);
+ /*
+Index: head-2008-12-01/drivers/xen/sfc_netback/accel_msg.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netback/accel_msg.c 2008-02-20 09:32:49.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netback/accel_msg.c 2008-12-01 11:36:55.000000000 +0100
+@@ -57,11 +57,11 @@ static void netback_accel_msg_tx_localma
+ {
+ unsigned long lock_state;
+ struct net_accel_msg *msg;
++ DECLARE_MAC_BUF(buf);
+
+ BUG_ON(bend == NULL || mac == NULL);
+
+- VPRINTK("Sending local mac message: " MAC_FMT "\n",
+- MAC_ARG((const char *)mac));
++ VPRINTK("Sending local mac message: %s\n", print_mac(buf, mac));
+
+ msg = net_accel_msg_start_send(bend->shared_page, &bend->to_domU,
+ &lock_state);
+Index: head-2008-12-01/drivers/xen/sfc_netfront/accel_msg.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netfront/accel_msg.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netfront/accel_msg.c 2008-12-01 11:36:55.000000000 +0100
+@@ -41,11 +41,13 @@ static void vnic_start_interrupts(netfro
+ /* Prime our interrupt */
+ spin_lock_irqsave(&vnic->irq_enabled_lock, flags);
+ if (!netfront_accel_vi_enable_interrupts(vnic)) {
++ struct netfront_info *np = netdev_priv(vnic->net_dev);
++
+ /* Cripes, that was quick, better pass it up */
+ netfront_accel_disable_net_interrupts(vnic);
+ vnic->irq_enabled = 0;
+ NETFRONT_ACCEL_STATS_OP(vnic->stats.poll_schedule_count++);
+- netif_rx_schedule(vnic->net_dev);
++ netif_rx_schedule(vnic->net_dev, &np->napi);
+ } else {
+ /*
+ * Nothing yet, make sure we get interrupts through
+@@ -72,6 +74,7 @@ static void vnic_stop_interrupts(netfron
+ static void vnic_start_fastpath(netfront_accel_vnic *vnic)
+ {
+ struct net_device *net_dev = vnic->net_dev;
++ struct netfront_info *np = netdev_priv(net_dev);
+ unsigned long flags;
+
+ DPRINTK("%s\n", __FUNCTION__);
+@@ -80,9 +83,9 @@ static void vnic_start_fastpath(netfront
+ vnic->tx_enabled = 1;
+ spin_unlock_irqrestore(&vnic->tx_lock, flags);
+
+- netif_poll_disable(net_dev);
++ napi_disable(&np->napi);
+ vnic->poll_enabled = 1;
+- netif_poll_enable(net_dev);
++ napi_enable(&np->napi);
+
+ vnic_start_interrupts(vnic);
+ }
+@@ -114,11 +117,11 @@ void vnic_stop_fastpath(netfront_accel_v
+ spin_unlock_irqrestore(&vnic->tx_lock, flags1);
+
+ /* Must prevent polls and hold lock to modify poll_enabled */
+- netif_poll_disable(net_dev);
++ napi_disable(&np->napi);
+ spin_lock_irqsave(&vnic->irq_enabled_lock, flags1);
+ vnic->poll_enabled = 0;
+ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags1);
+- netif_poll_enable(net_dev);
++ napi_enable(&np->napi);
+ }
+
+
+@@ -326,8 +329,10 @@ static int vnic_process_localmac_msg(net
+ cuckoo_hash_mac_key key;
+
+ if (msg->u.localmac.flags & NET_ACCEL_MSG_ADD) {
+- DPRINTK("MAC has moved, could be local: " MAC_FMT "\n",
+- MAC_ARG(msg->u.localmac.mac));
++ DECLARE_MAC_BUF(buf);
++
++ DPRINTK("MAC has moved, could be local: %s\n",
++ print_mac(buf, msg->u.localmac.mac));
+ key = cuckoo_mac_to_key(msg->u.localmac.mac);
+ spin_lock_irqsave(&vnic->table_lock, flags);
+ /* Try to remove it, not a big deal if not there */
+@@ -515,6 +520,8 @@ irqreturn_t netfront_accel_net_channel_i
+
+ spin_lock_irqsave(&vnic->irq_enabled_lock, flags);
+ if (vnic->irq_enabled) {
++ struct netfront_info *np = netdev_priv(net_dev);
++
+ netfront_accel_disable_net_interrupts(vnic);
+ vnic->irq_enabled = 0;
+ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
+@@ -527,7 +534,7 @@ irqreturn_t netfront_accel_net_channel_i
+ vnic->stats.event_count_since_irq;
+ vnic->stats.event_count_since_irq = 0;
+ #endif
+- netif_rx_schedule(net_dev);
++ netif_rx_schedule(net_dev, &np->napi);
+ }
+ else {
+ spin_unlock_irqrestore(&vnic->irq_enabled_lock, flags);
+Index: head-2008-12-01/drivers/xen/sfc_netfront/accel_vi.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netfront/accel_vi.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netfront/accel_vi.c 2008-12-01 11:36:55.000000000 +0100
+@@ -641,8 +641,10 @@ netfront_accel_vi_tx_post(netfront_accel
+ (cuckoo_hash_key *)(&key), &value);
+
+ if (!try_fastpath) {
+- VPRINTK("try fast path false for mac: " MAC_FMT "\n",
+- MAC_ARG(skb->data));
++ DECLARE_MAC_BUF(buf);
++
++ VPRINTK("try fast path false for mac: %s\n",
++ print_mac(buf, skb->data));
+
+ return NETFRONT_ACCEL_STATUS_CANT;
+ }
+@@ -768,9 +770,10 @@ static void netfront_accel_vi_rx_comple
+ if (compare_ether_addr(skb->data, vnic->mac)) {
+ struct iphdr *ip = (struct iphdr *)(skb->data + ETH_HLEN);
+ u16 port;
++ DECLARE_MAC_BUF(buf);
+
+- DPRINTK("%s: saw wrong MAC address " MAC_FMT "\n",
+- __FUNCTION__, MAC_ARG(skb->data));
++ DPRINTK("%s: saw wrong MAC address %s\n",
++ __FUNCTION__, print_mac(buf, skb->data));
+
+ if (ip->protocol == IPPROTO_TCP) {
+ struct tcphdr *tcp = (struct tcphdr *)
+Index: head-2008-12-01/drivers/xen/sfc_netutil/accel_util.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netutil/accel_util.h 2008-02-20 09:32:49.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netutil/accel_util.h 2008-12-01 11:36:55.000000000 +0100
+@@ -63,9 +63,6 @@
+ DPRINTK("%s at %s:%d\n", #exp, __FILE__, __LINE__); \
+ } while(0)
+
+-#define MAC_FMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x"
+-#define MAC_ARG(_mac) (_mac)[0], (_mac)[1], (_mac)[2], (_mac)[3], (_mac)[4], (_mac)[5]
+-
+ #include <xen/xenbus.h>
+
+ /*! Map a set of pages from another domain
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_probe.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_probe.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_probe.c 2008-12-01 11:36:55.000000000 +0100
+@@ -174,11 +174,9 @@ static int read_backend_details(struct x
+ }
+
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) && (defined(CONFIG_XEN) || defined(MODULE))
+-static int xenbus_uevent_frontend(struct device *dev, char **envp,
+- int num_envp, char *buffer, int buffer_size)
++static int xenbus_uevent_frontend(struct device *dev, struct kobj_uevent_env *env)
+ {
+ struct xenbus_device *xdev;
+- int length = 0, i = 0;
+
+ if (dev == NULL)
+ return -ENODEV;
+@@ -187,12 +185,9 @@ static int xenbus_uevent_frontend(struct
+ return -ENODEV;
+
+ /* stuff we want to pass to /sbin/hotplug */
+- add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+- "XENBUS_TYPE=%s", xdev->devicetype);
+- add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+- "XENBUS_PATH=%s", xdev->nodename);
+- add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+- "MODALIAS=xen:%s", xdev->devicetype);
++ add_uevent_var(env, "XENBUS_TYPE=%s", xdev->devicetype);
++ add_uevent_var(env, "XENBUS_PATH=%s", xdev->nodename);
++ add_uevent_var(env, "MODALIAS=xen:%s", xdev->devicetype);
+
+ return 0;
+ }
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_probe_backend.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_probe_backend.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_probe_backend.c 2008-12-01 11:36:55.000000000 +0100
+@@ -60,8 +60,7 @@
+ #include <xen/platform-compat.h>
+ #endif
+
+-static int xenbus_uevent_backend(struct device *dev, char **envp,
+- int num_envp, char *buffer, int buffer_size);
++static int xenbus_uevent_backend(struct device *dev, struct kobj_uevent_env *env);
+ static int xenbus_probe_backend(const char *type, const char *domid);
+
+ extern int read_otherend_details(struct xenbus_device *xendev,
+@@ -128,13 +127,10 @@ static struct xen_bus_type xenbus_backen
+ },
+ };
+
+-static int xenbus_uevent_backend(struct device *dev, char **envp,
+- int num_envp, char *buffer, int buffer_size)
++static int xenbus_uevent_backend(struct device *dev, struct kobj_uevent_env *env)
+ {
+ struct xenbus_device *xdev;
+ struct xenbus_driver *drv;
+- int i = 0;
+- int length = 0;
+
+ DPRINTK("");
+
+@@ -146,27 +142,16 @@ static int xenbus_uevent_backend(struct
+ return -ENODEV;
+
+ /* stuff we want to pass to /sbin/hotplug */
+- add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+- "XENBUS_TYPE=%s", xdev->devicetype);
++ add_uevent_var(env, "XENBUS_TYPE=%s", xdev->devicetype);
+
+- add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+- "XENBUS_PATH=%s", xdev->nodename);
++ add_uevent_var(env, "XENBUS_PATH=%s", xdev->nodename);
+
+- add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+- "XENBUS_BASE_PATH=%s", xenbus_backend.root);
+-
+- /* terminate, set to next free slot, shrink available space */
+- envp[i] = NULL;
+- envp = &envp[i];
+- num_envp -= i;
+- buffer = &buffer[length];
+- buffer_size -= length;
++ add_uevent_var(env, "XENBUS_BASE_PATH=%s", xenbus_backend.root);
+
+ if (dev->driver) {
+ drv = to_xenbus_driver(dev->driver);
+ if (drv && drv->uevent)
+- return drv->uevent(xdev, envp, num_envp, buffer,
+- buffer_size);
++ return drv->uevent(xdev, env);
+ }
+
+ return 0;
+Index: head-2008-12-01/fs/xfs/linux-2.6/xfs_buf.c
+===================================================================
+--- head-2008-12-01.orig/fs/xfs/linux-2.6/xfs_buf.c 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/fs/xfs/linux-2.6/xfs_buf.c 2008-12-01 11:36:55.000000000 +0100
+@@ -187,7 +187,7 @@ free_address(
+ {
+ a_list_t *aentry;
+
+-#ifdef CONFIG_XEN
++#if defined(CONFIG_XEN) || defined(CONFIG_PARAVIRT_XEN)
+ /*
+ * Xen needs to be able to make sure it can get an exclusive
+ * RO mapping of pages it wants to turn into a pagetable. If
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/agp.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/agp.h 2007-06-22 09:08:06.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/agp.h 2008-12-01 11:36:55.000000000 +0100
+@@ -1,20 +1,22 @@
+-#ifndef AGP_H
+-#define AGP_H 1
++#ifndef _ASM_X86_AGP_H
++#define _ASM_X86_AGP_H
+
+ #include <asm/pgtable.h>
+ #include <asm/cacheflush.h>
+ #include <asm/system.h>
+
+-/*
+- * Functions to keep the agpgart mappings coherent with the MMU.
+- * The GART gives the CPU a physical alias of pages in memory. The alias region is
+- * mapped uncacheable. Make sure there are no conflicting mappings
+- * with different cachability attributes for the same page. This avoids
+- * data corruption on some CPUs.
++/*
++ * Functions to keep the agpgart mappings coherent with the MMU. The
++ * GART gives the CPU a physical alias of pages in memory. The alias
++ * region is mapped uncacheable. Make sure there are no conflicting
++ * mappings with different cachability attributes for the same
++ * page. This avoids data corruption on some CPUs.
+ */
+
+-/* Caller's responsibility to call global_flush_tlb() for
+- * performance reasons */
++/*
++ * Caller's responsibility to call global_flush_tlb() for performance
++ * reasons
++ */
+ #define map_page_into_agp(page) ( \
+ xen_create_contiguous_region((unsigned long)page_address(page), 0, 32) \
+ ?: change_page_attr(page, 1, PAGE_KERNEL_NOCACHE))
+@@ -24,9 +26,11 @@
+ change_page_attr(page, 1, PAGE_KERNEL))
+ #define flush_agp_mappings() global_flush_tlb()
+
+-/* Could use CLFLUSH here if the cpu supports it. But then it would
+- need to be called for each cacheline of the whole page so it may not be
+- worth it. Would need a page for it. */
++/*
++ * Could use CLFLUSH here if the cpu supports it. But then it would
++ * need to be called for each cacheline of the whole page so it may
++ * not be worth it. Would need a page for it.
++ */
+ #define flush_agp_cache() wbinvd()
+
+ /* Convert a physical address to an address suitable for the GART. */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/desc.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/desc.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "desc_32.h"
++#else
++# include "desc_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/desc_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/desc_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/desc_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -34,6 +34,18 @@ static inline void clear_LDT(void)
+ put_cpu();
+ }
+
++#ifndef CONFIG_X86_NO_TSS
++static inline unsigned long __store_tr(void)
++{
++ unsigned long tr;
++
++ asm volatile ("str %w0":"=r" (tr));
++ return tr;
++}
++
++#define store_tr(tr) (tr) = __store_tr()
++#endif
++
+ /*
+ * This is the ldt that every process will get unless we need
+ * something other than this.
+@@ -47,6 +59,18 @@ extern struct desc_ptr cpu_gdt_descr[];
+ /* the cpu gdt accessor */
+ #define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+
++#ifndef CONFIG_XEN
++static inline void load_gdt(const struct desc_ptr *ptr)
++{
++ asm volatile("lgdt %w0"::"m" (*ptr));
++}
++
++static inline void store_gdt(struct desc_ptr *ptr)
++{
++ asm("sgdt %w0":"=m" (*ptr));
++}
++#endif
++
+ static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist)
+ {
+ struct gate_struct s;
+@@ -87,6 +111,16 @@ static inline void set_system_gate_ist(i
+ {
+ _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
+ }
++
++static inline void load_idt(const struct desc_ptr *ptr)
++{
++ asm volatile("lidt %w0"::"m" (*ptr));
++}
++
++static inline void store_idt(struct desc_ptr *dtr)
++{
++ asm("sidt %w0":"=m" (*dtr));
++}
+ #endif
+
+ static inline void set_tssldt_descriptor(void *ptr, unsigned long tss, unsigned type,
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "dma-mapping_32.h"
++#else
++# include "dma-mapping_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/dma-mapping_32.h 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -7,9 +7,9 @@
+ */
+
+ #include <linux/mm.h>
++#include <linux/scatterlist.h>
+ #include <asm/cache.h>
+ #include <asm/io.h>
+-#include <asm/scatterlist.h>
+ #include <asm/swiotlb.h>
+
+ static inline int
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/dma-mapping_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/dma-mapping_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -6,8 +6,7 @@
+ * documentation.
+ */
+
+-
+-#include <asm/scatterlist.h>
++#include <linux/scatterlist.h>
+ #include <asm/io.h>
+
+ struct dma_mapping_ops {
+@@ -203,4 +202,4 @@ extern int panic_on_overflow;
+
+ #endif /* _X8664_DMA_MAPPING_H */
+
+-#include <asm-i386/mach-xen/asm/dma-mapping.h>
++#include "dma-mapping_32.h"
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "fixmap_32.h"
++#else
++# include "fixmap_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,404 @@
++/******************************************************************************
++ * hypercall.h
++ *
++ * Linux-specific hypervisor handling.
++ *
++ * Copyright (c) 2002-2004, K A Fraser
++ *
++ * 64-bit updates:
++ * Benjamin Liu <benjamin.liu@intel.com>
++ * Jun Nakajima <jun.nakajima@intel.com>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __HYPERCALL_H__
++#define __HYPERCALL_H__
++
++#ifndef __HYPERVISOR_H__
++# error "please don't include this file directly"
++#endif
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++# include <linux/string.h> /* memcpy() */
++#endif
++
++#ifdef CONFIG_XEN
++#define HYPERCALL_ASM_OPERAND "%c"
++#define HYPERCALL_LOCATION(op) (hypercall_page + (op) * 32)
++#define HYPERCALL_C_OPERAND(name) "i" (HYPERCALL_LOCATION(__HYPERVISOR_##name))
++#else
++#define HYPERCALL_ASM_OPERAND "*%"
++#define HYPERCALL_LOCATION(op) (hypercall_stubs + (op) * 32)
++#define HYPERCALL_C_OPERAND(name) "g" (HYPERCALL_LOCATION(__HYPERVISOR_##name))
++#endif
++
++#define HYPERCALL_ARG(arg, n) \
++ register typeof((arg)+0) __arg##n asm(HYPERCALL_arg##n) = (arg)
++
++#define _hypercall0(type, name) \
++({ \
++ type __res; \
++ asm volatile ( \
++ "call " HYPERCALL_ASM_OPERAND "1" \
++ : "=a" (__res) \
++ : HYPERCALL_C_OPERAND(name) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall1(type, name, arg) \
++({ \
++ type __res; \
++ HYPERCALL_ARG(arg, 1); \
++ asm volatile ( \
++ "call " HYPERCALL_ASM_OPERAND "2" \
++ : "=a" (__res), "+r" (__arg1) \
++ : HYPERCALL_C_OPERAND(name) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall2(type, name, a1, a2) \
++({ \
++ type __res; \
++ HYPERCALL_ARG(a1, 1); \
++ HYPERCALL_ARG(a2, 2); \
++ asm volatile ( \
++ "call " HYPERCALL_ASM_OPERAND "3" \
++ : "=a" (__res), "+r" (__arg1), "+r" (__arg2) \
++ : HYPERCALL_C_OPERAND(name) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall3(type, name, a1, a2, a3) \
++({ \
++ type __res; \
++ HYPERCALL_ARG(a1, 1); \
++ HYPERCALL_ARG(a2, 2); \
++ HYPERCALL_ARG(a3, 3); \
++ asm volatile ( \
++ "call " HYPERCALL_ASM_OPERAND "4" \
++ : "=a" (__res), "+r" (__arg1), \
++ "+r" (__arg2), "+r" (__arg3) \
++ : HYPERCALL_C_OPERAND(name) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall4(type, name, a1, a2, a3, a4) \
++({ \
++ type __res; \
++ HYPERCALL_ARG(a1, 1); \
++ HYPERCALL_ARG(a2, 2); \
++ HYPERCALL_ARG(a3, 3); \
++ HYPERCALL_ARG(a4, 4); \
++ asm volatile ( \
++ "call " HYPERCALL_ASM_OPERAND "5" \
++ : "=a" (__res), "+r" (__arg1), "+r" (__arg2), \
++ "+r" (__arg3), "+r" (__arg4) \
++ : HYPERCALL_C_OPERAND(name) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
++({ \
++ type __res; \
++ HYPERCALL_ARG(a1, 1); \
++ HYPERCALL_ARG(a2, 2); \
++ HYPERCALL_ARG(a3, 3); \
++ HYPERCALL_ARG(a4, 4); \
++ HYPERCALL_ARG(a5, 5); \
++ asm volatile ( \
++ "call " HYPERCALL_ASM_OPERAND "6" \
++ : "=a" (__res), "+r" (__arg1), "+r" (__arg2), \
++ "+r" (__arg3), "+r" (__arg4), "+r" (__arg5) \
++ : HYPERCALL_C_OPERAND(name) \
++ : "memory" ); \
++ __res; \
++})
++
++#define _hypercall(type, op, a1, a2, a3, a4, a5) \
++({ \
++ type __res; \
++ HYPERCALL_ARG(a1, 1); \
++ HYPERCALL_ARG(a2, 2); \
++ HYPERCALL_ARG(a3, 3); \
++ HYPERCALL_ARG(a4, 4); \
++ HYPERCALL_ARG(a5, 5); \
++ asm volatile ( \
++ "call *%6" \
++ : "=a" (__res), "+r" (__arg1), "+r" (__arg2), \
++ "+r" (__arg3), "+r" (__arg4), "+r" (__arg5) \
++ : "g" (HYPERCALL_LOCATION(op)) \
++ : "memory" ); \
++ __res; \
++})
++
++#ifdef CONFIG_X86_32
++# include "hypercall_32.h"
++#else
++# include "hypercall_64.h"
++#endif
++
++static inline int __must_check
++HYPERVISOR_set_trap_table(
++ const trap_info_t *table)
++{
++ return _hypercall1(int, set_trap_table, table);
++}
++
++static inline int __must_check
++HYPERVISOR_mmu_update(
++ mmu_update_t *req, unsigned int count, unsigned int *success_count,
++ domid_t domid)
++{
++ if (arch_use_lazy_mmu_mode())
++ return xen_multi_mmu_update(req, count, success_count, domid);
++ return _hypercall4(int, mmu_update, req, count, success_count, domid);
++}
++
++static inline int __must_check
++HYPERVISOR_mmuext_op(
++ struct mmuext_op *op, unsigned int count, unsigned int *success_count,
++ domid_t domid)
++{
++ if (arch_use_lazy_mmu_mode())
++ return xen_multi_mmuext_op(op, count, success_count, domid);
++ return _hypercall4(int, mmuext_op, op, count, success_count, domid);
++}
++
++static inline int __must_check
++HYPERVISOR_set_gdt(
++ unsigned long *frame_list, unsigned int entries)
++{
++ return _hypercall2(int, set_gdt, frame_list, entries);
++}
++
++static inline int __must_check
++HYPERVISOR_stack_switch(
++ unsigned long ss, unsigned long esp)
++{
++ return _hypercall2(int, stack_switch, ss, esp);
++}
++
++static inline int
++HYPERVISOR_fpu_taskswitch(
++ int set)
++{
++ return _hypercall1(int, fpu_taskswitch, set);
++}
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++static inline int __must_check
++HYPERVISOR_sched_op_compat(
++ int cmd, unsigned long arg)
++{
++ return _hypercall2(int, sched_op_compat, cmd, arg);
++}
++#endif
++
++static inline int __must_check
++HYPERVISOR_sched_op(
++ int cmd, void *arg)
++{
++ return _hypercall2(int, sched_op, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_platform_op(
++ struct xen_platform_op *platform_op)
++{
++ platform_op->interface_version = XENPF_INTERFACE_VERSION;
++ return _hypercall1(int, platform_op, platform_op);
++}
++
++static inline int __must_check
++HYPERVISOR_set_debugreg(
++ unsigned int reg, unsigned long value)
++{
++ return _hypercall2(int, set_debugreg, reg, value);
++}
++
++static inline unsigned long __must_check
++HYPERVISOR_get_debugreg(
++ unsigned int reg)
++{
++ return _hypercall1(unsigned long, get_debugreg, reg);
++}
++
++static inline int __must_check
++HYPERVISOR_memory_op(
++ unsigned int cmd, void *arg)
++{
++ if (arch_use_lazy_mmu_mode())
++ xen_multicall_flush(false);
++ return _hypercall2(int, memory_op, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_multicall(
++ multicall_entry_t *call_list, unsigned int nr_calls)
++{
++ return _hypercall2(int, multicall, call_list, nr_calls);
++}
++
++static inline int __must_check
++HYPERVISOR_event_channel_op(
++ int cmd, void *arg)
++{
++ int rc = _hypercall2(int, event_channel_op, cmd, arg);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ struct evtchn_op op;
++ op.cmd = cmd;
++ memcpy(&op.u, arg, sizeof(op.u));
++ rc = _hypercall1(int, event_channel_op_compat, &op);
++ memcpy(arg, &op.u, sizeof(op.u));
++ }
++#endif
++
++ return rc;
++}
++
++static inline int __must_check
++HYPERVISOR_xen_version(
++ int cmd, void *arg)
++{
++ return _hypercall2(int, xen_version, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_console_io(
++ int cmd, unsigned int count, char *str)
++{
++ return _hypercall3(int, console_io, cmd, count, str);
++}
++
++static inline int __must_check
++HYPERVISOR_physdev_op(
++ int cmd, void *arg)
++{
++ int rc = _hypercall2(int, physdev_op, cmd, arg);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (unlikely(rc == -ENOSYS)) {
++ struct physdev_op op;
++ op.cmd = cmd;
++ memcpy(&op.u, arg, sizeof(op.u));
++ rc = _hypercall1(int, physdev_op_compat, &op);
++ memcpy(arg, &op.u, sizeof(op.u));
++ }
++#endif
++
++ return rc;
++}
++
++static inline int __must_check
++HYPERVISOR_grant_table_op(
++ unsigned int cmd, void *uop, unsigned int count)
++{
++ if (arch_use_lazy_mmu_mode())
++ xen_multicall_flush(false);
++ return _hypercall3(int, grant_table_op, cmd, uop, count);
++}
++
++static inline int __must_check
++HYPERVISOR_vm_assist(
++ unsigned int cmd, unsigned int type)
++{
++ return _hypercall2(int, vm_assist, cmd, type);
++}
++
++static inline int __must_check
++HYPERVISOR_vcpu_op(
++ int cmd, unsigned int vcpuid, void *extra_args)
++{
++ return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
++}
++
++static inline int __must_check
++HYPERVISOR_suspend(
++ unsigned long srec)
++{
++ struct sched_shutdown sched_shutdown = {
++ .reason = SHUTDOWN_suspend
++ };
++
++ int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
++ &sched_shutdown, srec);
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (rc == -ENOSYS)
++ rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
++ SHUTDOWN_suspend, srec);
++#endif
++
++ return rc;
++}
++
++#if CONFIG_XEN_COMPAT <= 0x030002
++static inline int
++HYPERVISOR_nmi_op(
++ unsigned long op, void *arg)
++{
++ return _hypercall2(int, nmi_op, op, arg);
++}
++#endif
++
++#ifndef CONFIG_XEN
++static inline unsigned long __must_check
++HYPERVISOR_hvm_op(
++ int op, void *arg)
++{
++ return _hypercall2(unsigned long, hvm_op, op, arg);
++}
++#endif
++
++static inline int __must_check
++HYPERVISOR_callback_op(
++ int cmd, const void *arg)
++{
++ return _hypercall2(int, callback_op, cmd, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_xenoprof_op(
++ int op, void *arg)
++{
++ return _hypercall2(int, xenoprof_op, op, arg);
++}
++
++static inline int __must_check
++HYPERVISOR_kexec_op(
++ unsigned long op, void *args)
++{
++ return _hypercall2(int, kexec_op, op, args);
++}
++
++#endif /* __HYPERCALL_H__ */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypercall_32.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -1,191 +1,10 @@
+-/******************************************************************************
+- * hypercall.h
+- *
+- * Linux-specific hypervisor handling.
+- *
+- * Copyright (c) 2002-2004, K A Fraser
+- *
+- * This program is free software; you can redistribute it and/or
+- * modify it under the terms of the GNU General Public License version 2
+- * as published by the Free Software Foundation; or, when distributed
+- * separately from the Linux kernel or incorporated into other
+- * software packages, subject to the following license:
+- *
+- * Permission is hereby granted, free of charge, to any person obtaining a copy
+- * of this source file (the "Software"), to deal in the Software without
+- * restriction, including without limitation the rights to use, copy, modify,
+- * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+- * and to permit persons to whom the Software is furnished to do so, subject to
+- * the following conditions:
+- *
+- * The above copyright notice and this permission notice shall be included in
+- * all copies or substantial portions of the Software.
+- *
+- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+- * IN THE SOFTWARE.
+- */
+-
+-#ifndef __HYPERCALL_H__
+-#define __HYPERCALL_H__
+-
+-#include <linux/string.h> /* memcpy() */
+-#include <linux/stringify.h>
+-
+-#ifndef __HYPERVISOR_H__
+-# error "please don't include this file directly"
+-#endif
+-
+-#ifdef CONFIG_XEN
+-#define HYPERCALL_STR(name) \
+- "call hypercall_page + ("__stringify(__HYPERVISOR_##name)" * 32)"
+-#else
+-#define HYPERCALL_STR(name) \
+- "mov hypercall_stubs,%%eax; " \
+- "add $("__stringify(__HYPERVISOR_##name)" * 32),%%eax; "\
+- "call *%%eax"
+-#endif
+-
+-#define _hypercall0(type, name) \
+-({ \
+- type __res; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res) \
+- : \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall1(type, name, a1) \
+-({ \
+- type __res; \
+- long __ign1; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=b" (__ign1) \
+- : "1" ((long)(a1)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall2(type, name, a1, a2) \
+-({ \
+- type __res; \
+- long __ign1, __ign2; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=b" (__ign1), "=c" (__ign2) \
+- : "1" ((long)(a1)), "2" ((long)(a2)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall3(type, name, a1, a2, a3) \
+-({ \
+- type __res; \
+- long __ign1, __ign2, __ign3; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
+- "=d" (__ign3) \
+- : "1" ((long)(a1)), "2" ((long)(a2)), \
+- "3" ((long)(a3)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall4(type, name, a1, a2, a3, a4) \
+-({ \
+- type __res; \
+- long __ign1, __ign2, __ign3, __ign4; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
+- "=d" (__ign3), "=S" (__ign4) \
+- : "1" ((long)(a1)), "2" ((long)(a2)), \
+- "3" ((long)(a3)), "4" ((long)(a4)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
+-({ \
+- type __res; \
+- long __ign1, __ign2, __ign3, __ign4, __ign5; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
+- "=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \
+- : "1" ((long)(a1)), "2" ((long)(a2)), \
+- "3" ((long)(a3)), "4" ((long)(a4)), \
+- "5" ((long)(a5)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall(type, op, a1, a2, a3, a4, a5) \
+-({ \
+- type __res; \
+- register typeof((a1)+0) __arg1 asm("ebx") = (a1); \
+- register typeof((a2)+0) __arg2 asm("ecx") = (a2); \
+- register typeof((a3)+0) __arg3 asm("edx") = (a3); \
+- register typeof((a4)+0) __arg4 asm("esi") = (a4); \
+- register typeof((a5)+0) __arg5 asm("edi") = (a5); \
+- asm volatile ( \
+- "call *%6" \
+- : "=a" (__res), "+r" (__arg1), "+r" (__arg2), \
+- "+r" (__arg3), "+r" (__arg4), "+r" (__arg5) \
+- : "0" (hypercall_page + (op) * 32) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-static inline int __must_check
+-HYPERVISOR_set_trap_table(
+- const trap_info_t *table)
+-{
+- return _hypercall1(int, set_trap_table, table);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_mmu_update(
+- mmu_update_t *req, unsigned int count, unsigned int *success_count,
+- domid_t domid)
+-{
+- if (arch_use_lazy_mmu_mode())
+- return xen_multi_mmu_update(req, count, success_count, domid);
+- return _hypercall4(int, mmu_update, req, count, success_count, domid);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_mmuext_op(
+- struct mmuext_op *op, unsigned int count, unsigned int *success_count,
+- domid_t domid)
+-{
+- if (arch_use_lazy_mmu_mode())
+- return xen_multi_mmuext_op(op, count, success_count, domid);
+- return _hypercall4(int, mmuext_op, op, count, success_count, domid);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_set_gdt(
+- unsigned long *frame_list, unsigned int entries)
+-{
+- return _hypercall2(int, set_gdt, frame_list, entries);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_stack_switch(
+- unsigned long ss, unsigned long esp)
+-{
+- return _hypercall2(int, stack_switch, ss, esp);
+-}
++#define HYPERCALL_arg1 "ebx"
++#define HYPERCALL_arg2 "ecx"
++#define HYPERCALL_arg3 "edx"
++#define HYPERCALL_arg4 "esi"
++#define HYPERCALL_arg5 "edi"
+
++#if CONFIG_XEN_COMPAT <= 0x030002
+ static inline int __must_check
+ HYPERVISOR_set_callbacks(
+ unsigned long event_selector, unsigned long event_address,
+@@ -195,80 +14,24 @@ HYPERVISOR_set_callbacks(
+ event_selector, event_address,
+ failsafe_selector, failsafe_address);
+ }
+-
+-static inline int
+-HYPERVISOR_fpu_taskswitch(
+- int set)
+-{
+- return _hypercall1(int, fpu_taskswitch, set);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_sched_op_compat(
+- int cmd, unsigned long arg)
+-{
+- return _hypercall2(int, sched_op_compat, cmd, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_sched_op(
+- int cmd, void *arg)
+-{
+- return _hypercall2(int, sched_op, cmd, arg);
+-}
++#endif
+
+ static inline long __must_check
+ HYPERVISOR_set_timer_op(
+ u64 timeout)
+ {
+- unsigned long timeout_hi = (unsigned long)(timeout>>32);
+- unsigned long timeout_lo = (unsigned long)timeout;
+- return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_platform_op(
+- struct xen_platform_op *platform_op)
+-{
+- platform_op->interface_version = XENPF_INTERFACE_VERSION;
+- return _hypercall1(int, platform_op, platform_op);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_set_debugreg(
+- unsigned int reg, unsigned long value)
+-{
+- return _hypercall2(int, set_debugreg, reg, value);
+-}
+-
+-static inline unsigned long __must_check
+-HYPERVISOR_get_debugreg(
+- unsigned int reg)
+-{
+- return _hypercall1(unsigned long, get_debugreg, reg);
++ return _hypercall2(long, set_timer_op,
++ (unsigned long)timeout,
++ (unsigned long)(timeout>>32));
+ }
+
+ static inline int __must_check
+ HYPERVISOR_update_descriptor(
+ u64 ma, u64 desc)
+ {
+- return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_memory_op(
+- unsigned int cmd, void *arg)
+-{
+- if (arch_use_lazy_mmu_mode())
+- xen_multicall_flush(false);
+- return _hypercall2(int, memory_op, cmd, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_multicall(
+- multicall_entry_t *call_list, unsigned int nr_calls)
+-{
+- return _hypercall2(int, multicall, call_list, nr_calls);
++ return _hypercall4(int, update_descriptor,
++ (unsigned long)ma, (unsigned long)(ma>>32),
++ (unsigned long)desc, (unsigned long)(desc>>32));
+ }
+
+ static inline int __must_check
+@@ -287,67 +50,6 @@ HYPERVISOR_update_va_mapping(
+ }
+
+ static inline int __must_check
+-HYPERVISOR_event_channel_op(
+- int cmd, void *arg)
+-{
+- int rc = _hypercall2(int, event_channel_op, cmd, arg);
+-
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (unlikely(rc == -ENOSYS)) {
+- struct evtchn_op op;
+- op.cmd = cmd;
+- memcpy(&op.u, arg, sizeof(op.u));
+- rc = _hypercall1(int, event_channel_op_compat, &op);
+- memcpy(arg, &op.u, sizeof(op.u));
+- }
+-#endif
+-
+- return rc;
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_xen_version(
+- int cmd, void *arg)
+-{
+- return _hypercall2(int, xen_version, cmd, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_console_io(
+- int cmd, unsigned int count, char *str)
+-{
+- return _hypercall3(int, console_io, cmd, count, str);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_physdev_op(
+- int cmd, void *arg)
+-{
+- int rc = _hypercall2(int, physdev_op, cmd, arg);
+-
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (unlikely(rc == -ENOSYS)) {
+- struct physdev_op op;
+- op.cmd = cmd;
+- memcpy(&op.u, arg, sizeof(op.u));
+- rc = _hypercall1(int, physdev_op_compat, &op);
+- memcpy(arg, &op.u, sizeof(op.u));
+- }
+-#endif
+-
+- return rc;
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_grant_table_op(
+- unsigned int cmd, void *uop, unsigned int count)
+-{
+- if (arch_use_lazy_mmu_mode())
+- xen_multicall_flush(false);
+- return _hypercall3(int, grant_table_op, cmd, uop, count);
+-}
+-
+-static inline int __must_check
+ HYPERVISOR_update_va_mapping_otherdomain(
+ unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
+ {
+@@ -358,80 +60,3 @@ HYPERVISOR_update_va_mapping_otherdomain
+ return _hypercall5(int, update_va_mapping_otherdomain, va,
+ new_val.pte_low, pte_hi, flags, domid);
+ }
+-
+-static inline int __must_check
+-HYPERVISOR_vm_assist(
+- unsigned int cmd, unsigned int type)
+-{
+- return _hypercall2(int, vm_assist, cmd, type);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_vcpu_op(
+- int cmd, unsigned int vcpuid, void *extra_args)
+-{
+- return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_suspend(
+- unsigned long srec)
+-{
+- struct sched_shutdown sched_shutdown = {
+- .reason = SHUTDOWN_suspend
+- };
+-
+- int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
+- &sched_shutdown, srec);
+-
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (rc == -ENOSYS)
+- rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
+- SHUTDOWN_suspend, srec);
+-#endif
+-
+- return rc;
+-}
+-
+-#if CONFIG_XEN_COMPAT <= 0x030002
+-static inline int
+-HYPERVISOR_nmi_op(
+- unsigned long op, void *arg)
+-{
+- return _hypercall2(int, nmi_op, op, arg);
+-}
+-#endif
+-
+-#ifndef CONFIG_XEN
+-static inline unsigned long __must_check
+-HYPERVISOR_hvm_op(
+- int op, void *arg)
+-{
+- return _hypercall2(unsigned long, hvm_op, op, arg);
+-}
+-#endif
+-
+-static inline int __must_check
+-HYPERVISOR_callback_op(
+- int cmd, const void *arg)
+-{
+- return _hypercall2(int, callback_op, cmd, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_xenoprof_op(
+- int op, void *arg)
+-{
+- return _hypercall2(int, xenoprof_op, op, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_kexec_op(
+- unsigned long op, void *args)
+-{
+- return _hypercall2(int, kexec_op, op, args);
+-}
+-
+-
+-
+-#endif /* __HYPERCALL_H__ */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypercall_64.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -1,197 +1,10 @@
+-/******************************************************************************
+- * hypercall.h
+- *
+- * Linux-specific hypervisor handling.
+- *
+- * Copyright (c) 2002-2004, K A Fraser
+- *
+- * 64-bit updates:
+- * Benjamin Liu <benjamin.liu@intel.com>
+- * Jun Nakajima <jun.nakajima@intel.com>
+- *
+- * This program is free software; you can redistribute it and/or
+- * modify it under the terms of the GNU General Public License version 2
+- * as published by the Free Software Foundation; or, when distributed
+- * separately from the Linux kernel or incorporated into other
+- * software packages, subject to the following license:
+- *
+- * Permission is hereby granted, free of charge, to any person obtaining a copy
+- * of this source file (the "Software"), to deal in the Software without
+- * restriction, including without limitation the rights to use, copy, modify,
+- * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+- * and to permit persons to whom the Software is furnished to do so, subject to
+- * the following conditions:
+- *
+- * The above copyright notice and this permission notice shall be included in
+- * all copies or substantial portions of the Software.
+- *
+- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+- * IN THE SOFTWARE.
+- */
+-
+-#ifndef __HYPERCALL_H__
+-#define __HYPERCALL_H__
+-
+-#include <linux/string.h> /* memcpy() */
+-#include <linux/stringify.h>
+-
+-#ifndef __HYPERVISOR_H__
+-# error "please don't include this file directly"
+-#endif
+-
+-#ifdef CONFIG_XEN
+-#define HYPERCALL_STR(name) \
+- "call hypercall_page + ("__stringify(__HYPERVISOR_##name)" * 32)"
+-#else
+-#define HYPERCALL_STR(name) \
+- "mov $("__stringify(__HYPERVISOR_##name)" * 32),%%eax; "\
+- "add hypercall_stubs(%%rip),%%rax; " \
+- "call *%%rax"
+-#endif
+-
+-#define _hypercall0(type, name) \
+-({ \
+- type __res; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res) \
+- : \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall1(type, name, a1) \
+-({ \
+- type __res; \
+- long __ign1; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=D" (__ign1) \
+- : "1" ((long)(a1)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall2(type, name, a1, a2) \
+-({ \
+- type __res; \
+- long __ign1, __ign2; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=D" (__ign1), "=S" (__ign2) \
+- : "1" ((long)(a1)), "2" ((long)(a2)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall3(type, name, a1, a2, a3) \
+-({ \
+- type __res; \
+- long __ign1, __ign2, __ign3; \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
+- "=d" (__ign3) \
+- : "1" ((long)(a1)), "2" ((long)(a2)), \
+- "3" ((long)(a3)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall4(type, name, a1, a2, a3, a4) \
+-({ \
+- type __res; \
+- long __ign1, __ign2, __ign3; \
+- register long __arg4 asm("r10") = (long)(a4); \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
+- "=d" (__ign3), "+r" (__arg4) \
+- : "1" ((long)(a1)), "2" ((long)(a2)), \
+- "3" ((long)(a3)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
+-({ \
+- type __res; \
+- long __ign1, __ign2, __ign3; \
+- register long __arg4 asm("r10") = (long)(a4); \
+- register long __arg5 asm("r8") = (long)(a5); \
+- asm volatile ( \
+- HYPERCALL_STR(name) \
+- : "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
+- "=d" (__ign3), "+r" (__arg4), "+r" (__arg5) \
+- : "1" ((long)(a1)), "2" ((long)(a2)), \
+- "3" ((long)(a3)) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-#define _hypercall(type, op, a1, a2, a3, a4, a5) \
+-({ \
+- type __res; \
+- register typeof((a1)+0) __arg1 asm("rdi") = (a1); \
+- register typeof((a2)+0) __arg2 asm("rsi") = (a2); \
+- register typeof((a3)+0) __arg3 asm("rdx") = (a3); \
+- register typeof((a4)+0) __arg4 asm("r10") = (a4); \
+- register typeof((a5)+0) __arg5 asm("r8") = (a5); \
+- asm volatile ( \
+- "call *%6" \
+- : "=a" (__res), "+r" (__arg1), "+r" (__arg2), \
+- "+r" (__arg3), "+r" (__arg4), "+r" (__arg5) \
+- : "0" (hypercall_page + (op) * 32) \
+- : "memory" ); \
+- __res; \
+-})
+-
+-static inline int __must_check
+-HYPERVISOR_set_trap_table(
+- const trap_info_t *table)
+-{
+- return _hypercall1(int, set_trap_table, table);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_mmu_update(
+- mmu_update_t *req, unsigned int count, unsigned int *success_count,
+- domid_t domid)
+-{
+- if (arch_use_lazy_mmu_mode())
+- return xen_multi_mmu_update(req, count, success_count, domid);
+- return _hypercall4(int, mmu_update, req, count, success_count, domid);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_mmuext_op(
+- struct mmuext_op *op, unsigned int count, unsigned int *success_count,
+- domid_t domid)
+-{
+- if (arch_use_lazy_mmu_mode())
+- return xen_multi_mmuext_op(op, count, success_count, domid);
+- return _hypercall4(int, mmuext_op, op, count, success_count, domid);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_set_gdt(
+- unsigned long *frame_list, unsigned int entries)
+-{
+- return _hypercall2(int, set_gdt, frame_list, entries);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_stack_switch(
+- unsigned long ss, unsigned long esp)
+-{
+- return _hypercall2(int, stack_switch, ss, esp);
+-}
++#define HYPERCALL_arg1 "rdi"
++#define HYPERCALL_arg2 "rsi"
++#define HYPERCALL_arg3 "rdx"
++#define HYPERCALL_arg4 "r10"
++#define HYPERCALL_arg5 "r8"
+
++#if CONFIG_XEN_COMPAT <= 0x030002
+ static inline int __must_check
+ HYPERVISOR_set_callbacks(
+ unsigned long event_address, unsigned long failsafe_address,
+@@ -200,27 +13,7 @@ HYPERVISOR_set_callbacks(
+ return _hypercall3(int, set_callbacks,
+ event_address, failsafe_address, syscall_address);
+ }
+-
+-static inline int
+-HYPERVISOR_fpu_taskswitch(
+- int set)
+-{
+- return _hypercall1(int, fpu_taskswitch, set);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_sched_op_compat(
+- int cmd, unsigned long arg)
+-{
+- return _hypercall2(int, sched_op_compat, cmd, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_sched_op(
+- int cmd, void *arg)
+-{
+- return _hypercall2(int, sched_op, cmd, arg);
+-}
++#endif
+
+ static inline long __must_check
+ HYPERVISOR_set_timer_op(
+@@ -230,28 +23,6 @@ HYPERVISOR_set_timer_op(
+ }
+
+ static inline int __must_check
+-HYPERVISOR_platform_op(
+- struct xen_platform_op *platform_op)
+-{
+- platform_op->interface_version = XENPF_INTERFACE_VERSION;
+- return _hypercall1(int, platform_op, platform_op);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_set_debugreg(
+- unsigned int reg, unsigned long value)
+-{
+- return _hypercall2(int, set_debugreg, reg, value);
+-}
+-
+-static inline unsigned long __must_check
+-HYPERVISOR_get_debugreg(
+- unsigned int reg)
+-{
+- return _hypercall1(unsigned long, get_debugreg, reg);
+-}
+-
+-static inline int __must_check
+ HYPERVISOR_update_descriptor(
+ unsigned long ma, unsigned long word)
+ {
+@@ -259,22 +30,6 @@ HYPERVISOR_update_descriptor(
+ }
+
+ static inline int __must_check
+-HYPERVISOR_memory_op(
+- unsigned int cmd, void *arg)
+-{
+- if (arch_use_lazy_mmu_mode())
+- xen_multicall_flush(false);
+- return _hypercall2(int, memory_op, cmd, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_multicall(
+- multicall_entry_t *call_list, unsigned int nr_calls)
+-{
+- return _hypercall2(int, multicall, call_list, nr_calls);
+-}
+-
+-static inline int __must_check
+ HYPERVISOR_update_va_mapping(
+ unsigned long va, pte_t new_val, unsigned long flags)
+ {
+@@ -284,67 +39,6 @@ HYPERVISOR_update_va_mapping(
+ }
+
+ static inline int __must_check
+-HYPERVISOR_event_channel_op(
+- int cmd, void *arg)
+-{
+- int rc = _hypercall2(int, event_channel_op, cmd, arg);
+-
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (unlikely(rc == -ENOSYS)) {
+- struct evtchn_op op;
+- op.cmd = cmd;
+- memcpy(&op.u, arg, sizeof(op.u));
+- rc = _hypercall1(int, event_channel_op_compat, &op);
+- memcpy(arg, &op.u, sizeof(op.u));
+- }
+-#endif
+-
+- return rc;
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_xen_version(
+- int cmd, void *arg)
+-{
+- return _hypercall2(int, xen_version, cmd, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_console_io(
+- int cmd, unsigned int count, char *str)
+-{
+- return _hypercall3(int, console_io, cmd, count, str);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_physdev_op(
+- int cmd, void *arg)
+-{
+- int rc = _hypercall2(int, physdev_op, cmd, arg);
+-
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (unlikely(rc == -ENOSYS)) {
+- struct physdev_op op;
+- op.cmd = cmd;
+- memcpy(&op.u, arg, sizeof(op.u));
+- rc = _hypercall1(int, physdev_op_compat, &op);
+- memcpy(arg, &op.u, sizeof(op.u));
+- }
+-#endif
+-
+- return rc;
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_grant_table_op(
+- unsigned int cmd, void *uop, unsigned int count)
+-{
+- if (arch_use_lazy_mmu_mode())
+- xen_multicall_flush(false);
+- return _hypercall3(int, grant_table_op, cmd, uop, count);
+-}
+-
+-static inline int __must_check
+ HYPERVISOR_update_va_mapping_otherdomain(
+ unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
+ {
+@@ -353,83 +47,8 @@ HYPERVISOR_update_va_mapping_otherdomain
+ }
+
+ static inline int __must_check
+-HYPERVISOR_vm_assist(
+- unsigned int cmd, unsigned int type)
+-{
+- return _hypercall2(int, vm_assist, cmd, type);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_vcpu_op(
+- int cmd, unsigned int vcpuid, void *extra_args)
+-{
+- return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
+-}
+-
+-static inline int __must_check
+ HYPERVISOR_set_segment_base(
+ int reg, unsigned long value)
+ {
+ return _hypercall2(int, set_segment_base, reg, value);
+ }
+-
+-static inline int __must_check
+-HYPERVISOR_suspend(
+- unsigned long srec)
+-{
+- struct sched_shutdown sched_shutdown = {
+- .reason = SHUTDOWN_suspend
+- };
+-
+- int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
+- &sched_shutdown, srec);
+-
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (rc == -ENOSYS)
+- rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
+- SHUTDOWN_suspend, srec);
+-#endif
+-
+- return rc;
+-}
+-
+-#if CONFIG_XEN_COMPAT <= 0x030002
+-static inline int
+-HYPERVISOR_nmi_op(
+- unsigned long op, void *arg)
+-{
+- return _hypercall2(int, nmi_op, op, arg);
+-}
+-#endif
+-
+-#ifndef CONFIG_XEN
+-static inline unsigned long __must_check
+-HYPERVISOR_hvm_op(
+- int op, void *arg)
+-{
+- return _hypercall2(unsigned long, hvm_op, op, arg);
+-}
+-#endif
+-
+-static inline int __must_check
+-HYPERVISOR_callback_op(
+- int cmd, const void *arg)
+-{
+- return _hypercall2(int, callback_op, cmd, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_xenoprof_op(
+- int op, void *arg)
+-{
+- return _hypercall2(int, xenoprof_op, op, arg);
+-}
+-
+-static inline int __must_check
+-HYPERVISOR_kexec_op(
+- unsigned long op, void *args)
+-{
+- return _hypercall2(int, kexec_op, op, args);
+-}
+-
+-#endif /* __HYPERCALL_H__ */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 11:36:55.000000000 +0100
+@@ -194,7 +194,6 @@ static inline void xen_multicall_flush(b
+ extern char hypercall_page[PAGE_SIZE];
+ #else
+ extern char *hypercall_stubs;
+-#define hypercall_page hypercall_stubs
+ #define is_running_on_xen() (!!hypercall_stubs)
+ #endif
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "io_32.h"
++#else
++# include "io_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -212,17 +212,22 @@ static inline void writel(unsigned int b
+
+ #define mmiowb()
+
+-static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
++static inline void
++memset_io(volatile void __iomem *addr, unsigned char val, int count)
+ {
+- memset((void __force *) addr, val, count);
++ memset((void __force *)addr, val, count);
+ }
+-static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
++
++static inline void
++memcpy_fromio(void *dst, const volatile void __iomem *src, int count)
+ {
+- __memcpy(dst, (void __force *) src, count);
++ __memcpy(dst, (const void __force *)src, count);
+ }
+-static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
++
++static inline void
++memcpy_toio(volatile void __iomem *dst, const void *src, int count)
+ {
+- __memcpy((void __force *) dst, src, count);
++ __memcpy((void __force *)dst, src, count);
+ }
+
+ /*
+@@ -250,18 +255,9 @@ static inline void flush_write_buffers(v
+ __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory");
+ }
+
+-#define dma_cache_inv(_start,_size) flush_write_buffers()
+-#define dma_cache_wback(_start,_size) flush_write_buffers()
+-#define dma_cache_wback_inv(_start,_size) flush_write_buffers()
+-
+ #else
+
+-/* Nothing to do */
+-
+-#define dma_cache_inv(_start,_size) do { } while (0)
+-#define dma_cache_wback(_start,_size) do { } while (0)
+-#define dma_cache_wback_inv(_start,_size) do { } while (0)
+-#define flush_write_buffers()
++#define flush_write_buffers() do { } while (0)
+
+ #endif
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_64.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -268,12 +268,6 @@ void memset_io(volatile void __iomem *a,
+ */
+ #define __ISA_IO_base ((char __iomem *)(fix_to_virt(FIX_ISAMAP_BEGIN)))
+
+-/* Nothing to do */
+-
+-#define dma_cache_inv(_start,_size) do { } while (0)
+-#define dma_cache_wback(_start,_size) do { } while (0)
+-#define dma_cache_wback_inv(_start,_size) do { } while (0)
+-
+ #define flush_write_buffers()
+
+ extern int iommu_bio_merge;
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "irqflags_32.h"
++#else
++# include "irqflags_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/irqflags_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -148,6 +148,23 @@ static inline int raw_irqs_disabled_flag
+ \
+ raw_irqs_disabled_flags(flags); \
+ })
++
++/*
++ * makes the traced hardirq state match with the machine state
++ *
++ * should be a rarely used function, only in places where its
++ * otherwise impossible to know the irq state, like in traps.
++ */
++static inline void trace_hardirqs_fixup_flags(unsigned long flags)
++{
++ if (raw_irqs_disabled_flags(flags))
++ trace_hardirqs_off();
++ else
++ trace_hardirqs_on();
++}
++
++#define trace_hardirqs_fixup() \
++ trace_hardirqs_fixup_flags(__raw_local_save_flags())
+ #endif /* __ASSEMBLY__ */
+
+ /*
+@@ -179,4 +196,17 @@ static inline int raw_irqs_disabled_flag
+ # define TRACE_IRQS_OFF
+ #endif
+
++#ifdef CONFIG_DEBUG_LOCK_ALLOC
++# define LOCKDEP_SYS_EXIT \
++ pushl %eax; \
++ pushl %ecx; \
++ pushl %edx; \
++ call lockdep_sys_exit; \
++ popl %edx; \
++ popl %ecx; \
++ popl %eax;
++#else
++# define LOCKDEP_SYS_EXIT
++#endif
++
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/irqflags_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -116,6 +116,22 @@ static inline int raw_irqs_disabled_flag
+ })
+
+ /*
++ * makes the traced hardirq state match with the machine state
++ *
++ * should be a rarely used function, only in places where its
++ * otherwise impossible to know the irq state, like in traps.
++ */
++static inline void trace_hardirqs_fixup_flags(unsigned long flags)
++{
++ if (raw_irqs_disabled_flags(flags))
++ trace_hardirqs_off();
++ else
++ trace_hardirqs_on();
++}
++
++#define trace_hardirqs_fixup() \
++ trace_hardirqs_fixup_flags(__raw_local_save_flags())
++/*
+ * Used in the idle loop; sti takes one instruction cycle
+ * to complete:
+ */
+@@ -143,6 +159,20 @@ static inline void halt(void)
+ # define TRACE_IRQS_ON
+ # define TRACE_IRQS_OFF
+ # endif
++# ifdef CONFIG_DEBUG_LOCK_ALLOC
++# define LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk
++# define LOCKDEP_SYS_EXIT_IRQ \
++ TRACE_IRQS_ON; \
++ sti; \
++ SAVE_REST; \
++ LOCKDEP_SYS_EXIT; \
++ RESTORE_REST; \
++ cli; \
++ TRACE_IRQS_OFF;
++# else
++# define LOCKDEP_SYS_EXIT
++# define LOCKDEP_SYS_EXIT_IRQ
++# endif
+ #endif
+
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/maddr.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/maddr.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "maddr_32.h"
++#else
++# include "maddr_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "mmu_context_32.h"
++#else
++# include "mmu_context_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/page.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/page.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,13 @@
++#ifdef __KERNEL__
++# ifdef CONFIG_X86_32
++# include "page_32.h"
++# else
++# include "page_64.h"
++# endif
++#else
++# ifdef __i386__
++# include "page_32.h"
++# else
++# include "page_64.h"
++# endif
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/page_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/page_64.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/page_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -207,6 +207,7 @@ static inline unsigned long __phys_addr(
+ VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+ #define __HAVE_ARCH_GATE_AREA 1
++#define vmemmap ((struct page *)VMEMMAP_START)
+
+ #include <asm-generic/memory_model.h>
+ #include <asm-generic/page.h>
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pci.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pci.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,100 @@
++#ifndef __x86_PCI_H
++#define __x86_PCI_H
++
++#include <linux/mm.h> /* for struct page */
++#include <linux/types.h>
++#include <linux/slab.h>
++#include <linux/string.h>
++#include <asm/scatterlist.h>
++#include <asm/io.h>
++
++
++#ifdef __KERNEL__
++
++struct pci_sysdata {
++ int domain; /* PCI domain */
++ int node; /* NUMA node */
++#ifdef CONFIG_X86_64
++ void* iommu; /* IOMMU private data */
++#endif
++#ifdef CONFIG_XEN_PCIDEV_FRONTEND
++ struct pcifront_device *pdev;
++#endif
++};
++
++/* scan a bus after allocating a pci_sysdata for it */
++extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
++
++static inline int pci_domain_nr(struct pci_bus *bus)
++{
++ struct pci_sysdata *sd = bus->sysdata;
++ return sd->domain;
++}
++
++static inline int pci_proc_domain(struct pci_bus *bus)
++{
++ return pci_domain_nr(bus);
++}
++
++
++/* Can be used to override the logic in pci_scan_bus for skipping
++ already-configured bus numbers - to be used for buggy BIOSes
++ or architectures with incomplete PCI setup by the loader */
++
++#ifdef CONFIG_PCI
++extern unsigned int pcibios_assign_all_busses(void);
++#else
++#define pcibios_assign_all_busses() 0
++#endif
++
++#include <asm/hypervisor.h>
++#define pcibios_scan_all_fns(a, b) (!is_initial_xendomain())
++
++extern unsigned long pci_mem_start;
++#define PCIBIOS_MIN_IO 0x1000
++#define PCIBIOS_MIN_MEM (pci_mem_start)
++
++#define PCIBIOS_MIN_CARDBUS_IO 0x4000
++
++void pcibios_config_init(void);
++struct pci_bus * pcibios_scan_root(int bus);
++
++void pcibios_set_master(struct pci_dev *dev);
++void pcibios_penalize_isa_irq(int irq, int active);
++struct irq_routing_table *pcibios_get_irq_routing_table(void);
++int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
++
++
++#define HAVE_PCI_MMAP
++extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
++ enum pci_mmap_state mmap_state, int write_combine);
++
++
++#ifdef CONFIG_PCI
++static inline void pci_dma_burst_advice(struct pci_dev *pdev,
++ enum pci_dma_burst_strategy *strat,
++ unsigned long *strategy_parameter)
++{
++ *strat = PCI_DMA_BURST_INFINITY;
++ *strategy_parameter = ~0UL;
++}
++#endif
++
++
++#endif /* __KERNEL__ */
++
++#ifdef CONFIG_X86_32
++# include "pci_32.h"
++#else
++# include "pci_64.h"
++#endif
++
++/* implement the pci_ DMA API in terms of the generic device dma_ one */
++#include <asm-generic/pci-dma-compat.h>
++
++/* generic pci stuff */
++#include <asm-generic/pci.h>
++
++
++
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pci_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pci_32.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pci_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -4,52 +4,10 @@
+
+ #ifdef __KERNEL__
+
+-struct pci_sysdata {
+- int node; /* NUMA node */
+-};
+-
+-/* scan a bus after allocating a pci_sysdata for it */
+-extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
+-
+-#include <linux/mm.h> /* for struct page */
+-
+-/* Can be used to override the logic in pci_scan_bus for skipping
+- already-configured bus numbers - to be used for buggy BIOSes
+- or architectures with incomplete PCI setup by the loader */
+-
+-#ifdef CONFIG_PCI
+-extern unsigned int pcibios_assign_all_busses(void);
+-#else
+-#define pcibios_assign_all_busses() 0
+-#endif
+-
+-#include <asm/hypervisor.h>
+-#define pcibios_scan_all_fns(a, b) (!is_initial_xendomain())
+-
+-extern unsigned long pci_mem_start;
+-#define PCIBIOS_MIN_IO 0x1000
+-#define PCIBIOS_MIN_MEM (pci_mem_start)
+-
+-#define PCIBIOS_MIN_CARDBUS_IO 0x4000
+-
+-void pcibios_config_init(void);
+-struct pci_bus * pcibios_scan_root(int bus);
+-
+-void pcibios_set_master(struct pci_dev *dev);
+-void pcibios_penalize_isa_irq(int irq, int active);
+-struct irq_routing_table *pcibios_get_irq_routing_table(void);
+-int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
+-
+ /* Dynamic DMA mapping stuff.
+ * i386 has everything mapped statically.
+ */
+
+-#include <linux/types.h>
+-#include <linux/slab.h>
+-#include <asm/scatterlist.h>
+-#include <linux/string.h>
+-#include <asm/io.h>
+-
+ struct pci_dev;
+
+ #ifdef CONFIG_SWIOTLB
+@@ -89,31 +47,8 @@ struct pci_dev;
+
+ #endif
+
+-#define HAVE_PCI_MMAP
+-extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+- enum pci_mmap_state mmap_state, int write_combine);
+-
+-
+-#ifdef CONFIG_PCI
+-static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+- enum pci_dma_burst_strategy *strat,
+- unsigned long *strategy_parameter)
+-{
+- *strat = PCI_DMA_BURST_INFINITY;
+- *strategy_parameter = ~0UL;
+-}
+-#endif
+
+ #endif /* __KERNEL__ */
+
+-#ifdef CONFIG_XEN_PCIDEV_FRONTEND
+-#include <xen/pcifront.h>
+-#endif /* CONFIG_XEN_PCIDEV_FRONTEND */
+-
+-/* implement the pci_ DMA API in terms of the generic device dma_ one */
+-#include <asm-generic/pci-dma-compat.h>
+-
+-/* generic pci stuff */
+-#include <asm-generic/pci.h>
+
+ #endif /* __i386_PCI_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pci_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pci_64.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pci_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -1,16 +1,9 @@
+ #ifndef __x8664_PCI_H
+ #define __x8664_PCI_H
+
+-#include <asm/io.h>
+
+ #ifdef __KERNEL__
+
+-struct pci_sysdata {
+- int node; /* NUMA node */
+- void* iommu; /* IOMMU private data */
+-};
+-
+-extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
+
+ #ifdef CONFIG_CALGARY_IOMMU
+ static inline void* pci_iommu(struct pci_bus *bus)
+@@ -26,42 +19,11 @@ static inline void set_pci_iommu(struct
+ }
+ #endif /* CONFIG_CALGARY_IOMMU */
+
+-#include <linux/mm.h> /* for struct page */
+-
+-/* Can be used to override the logic in pci_scan_bus for skipping
+- already-configured bus numbers - to be used for buggy BIOSes
+- or architectures with incomplete PCI setup by the loader */
+-
+-#ifdef CONFIG_PCI
+-extern unsigned int pcibios_assign_all_busses(void);
+-#else
+-#define pcibios_assign_all_busses() 0
+-#endif
+-
+-#include <asm/hypervisor.h>
+-#define pcibios_scan_all_fns(a, b) (!is_initial_xendomain())
+-
+-extern unsigned long pci_mem_start;
+-#define PCIBIOS_MIN_IO 0x1000
+-#define PCIBIOS_MIN_MEM (pci_mem_start)
+-
+-#define PCIBIOS_MIN_CARDBUS_IO 0x4000
+
+-void pcibios_config_init(void);
+-struct pci_bus * pcibios_scan_root(int bus);
+ extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
+ extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
+
+-void pcibios_set_master(struct pci_dev *dev);
+-void pcibios_penalize_isa_irq(int irq, int active);
+-struct irq_routing_table *pcibios_get_irq_routing_table(void);
+-int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
+-
+-#include <linux/types.h>
+-#include <linux/slab.h>
+-#include <asm/scatterlist.h>
+-#include <linux/string.h>
+-#include <asm/page.h>
++
+
+ extern void pci_iommu_alloc(void);
+ extern int iommu_setup(char *opt);
+@@ -75,7 +37,7 @@ extern int iommu_setup(char *opt);
+ */
+ #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
+
+-#if defined(CONFIG_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
++#if defined(CONFIG_GART_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
+
+ #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
+ dma_addr_t ADDR_NAME;
+@@ -119,27 +81,7 @@ extern int iommu_setup(char *opt);
+
+ #endif
+
+-#include <asm-generic/pci-dma-compat.h>
+-
+-#ifdef CONFIG_PCI
+-static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+- enum pci_dma_burst_strategy *strat,
+- unsigned long *strategy_parameter)
+-{
+- *strat = PCI_DMA_BURST_INFINITY;
+- *strategy_parameter = ~0UL;
+-}
+-#endif
+-
+-#define HAVE_PCI_MMAP
+-extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+- enum pci_mmap_state mmap_state, int write_combine);
+-
+ #endif /* __KERNEL__ */
+
+-/* generic pci stuff */
+-#ifdef CONFIG_PCI
+-#include <asm-generic/pci.h>
+-#endif
+
+ #endif /* __x8664_PCI_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "pgalloc_32.h"
++#else
++# include "pgalloc_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgalloc_64.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -112,6 +112,8 @@ static inline void pgd_list_del(pgd_t *p
+ spin_unlock(&pgd_lock);
+ }
+
++extern void pgd_test_and_unpin(pgd_t *);
++
+ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+ {
+ /*
+@@ -122,6 +124,7 @@ static inline pgd_t *pgd_alloc(struct mm
+ if (!pgd)
+ return NULL;
+ pgd_list_add(pgd);
++ pgd_test_and_unpin(pgd);
+ /*
+ * Copy kernel pointers in from init.
+ * Could keep a freelist or slab cache of those because the kernel
+@@ -144,27 +147,7 @@ static inline pgd_t *pgd_alloc(struct mm
+
+ static inline void pgd_free(pgd_t *pgd)
+ {
+- pte_t *ptep = virt_to_ptep(pgd);
+-
+- if (!pte_write(*ptep)) {
+- xen_pgd_unpin(__pa(pgd));
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)pgd,
+- pfn_pte(virt_to_phys(pgd)>>PAGE_SHIFT, PAGE_KERNEL),
+- 0));
+- }
+-
+- ptep = virt_to_ptep(__user_pgd(pgd));
+-
+- if (!pte_write(*ptep)) {
+- xen_pgd_unpin(__pa(__user_pgd(pgd)));
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)__user_pgd(pgd),
+- pfn_pte(virt_to_phys(__user_pgd(pgd))>>PAGE_SHIFT,
+- PAGE_KERNEL),
+- 0));
+- }
+-
++ pgd_test_and_unpin(pgd);
+ pgd_list_del(pgd);
+ free_pages((unsigned long)pgd, 1);
+ }
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "pgtable_32.h"
++#else
++# include "pgtable_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -17,10 +17,7 @@
+ #include <asm/fixmap.h>
+ #include <linux/threads.h>
+
+-#ifndef _I386_BITOPS_H
+-#include <asm/bitops.h>
+-#endif
+-
++#include <linux/bitops.h>
+ #include <linux/slab.h>
+ #include <linux/list.h>
+ #include <linux/spinlock.h>
+@@ -40,7 +37,7 @@ extern spinlock_t pgd_lock;
+ extern struct page *pgd_list;
+ void check_pgt_cache(void);
+
+-void pmd_ctor(void *, struct kmem_cache *, unsigned long);
++void pmd_ctor(struct kmem_cache *, void *);
+ void pgtable_cache_init(void);
+ void paging_init(void);
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -9,7 +9,7 @@
+ * the x86-64 page table tree.
+ */
+ #include <asm/processor.h>
+-#include <asm/bitops.h>
++#include <linux/bitops.h>
+ #include <linux/threads.h>
+ #include <linux/sched.h>
+ #include <asm/pda.h>
+@@ -137,6 +137,7 @@ static inline void pgd_clear (pgd_t * pg
+ #define MAXMEM _AC(0x3fffffffffff, UL)
+ #define VMALLOC_START _AC(0xffffc20000000000, UL)
+ #define VMALLOC_END _AC(0xffffe1ffffffffff, UL)
++#define VMEMMAP_START _AC(0xffffe20000000000, UL)
+ #define MODULES_VADDR _AC(0xffffffff88000000, UL)
+ #define MODULES_END _AC(0xfffffffffff00000, UL)
+ #define MODULES_LEN (MODULES_END - MODULES_VADDR)
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "processor_32.h"
++#else
++# include "processor_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -80,6 +80,7 @@ struct cpuinfo_x86 {
+ unsigned char booted_cores; /* number of cores as seen by OS */
+ __u8 phys_proc_id; /* Physical processor id. */
+ __u8 cpu_core_id; /* Core id */
++ __u8 cpu_index; /* index into per_cpu list */
+ #endif
+ } __attribute__((__aligned__(SMP_CACHE_BYTES)));
+
+@@ -106,14 +107,19 @@ DECLARE_PER_CPU(struct tss_struct, init_
+ #endif
+
+ #ifdef CONFIG_SMP
+-extern struct cpuinfo_x86 cpu_data[];
+-#define current_cpu_data cpu_data[smp_processor_id()]
++DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
++#define cpu_data(cpu) per_cpu(cpu_info, cpu)
++#define current_cpu_data cpu_data(smp_processor_id())
+ #else
+-#define cpu_data (&boot_cpu_data)
+-#define current_cpu_data boot_cpu_data
++#define cpu_data(cpu) boot_cpu_data
++#define current_cpu_data boot_cpu_data
+ #endif
+
+-extern int cpu_llc_id[NR_CPUS];
++/*
++ * the following now lives in the per cpu area:
++ * extern int cpu_llc_id[NR_CPUS];
++ */
++DECLARE_PER_CPU(u8, cpu_llc_id);
+ extern char ignore_fpu_irq;
+
+ void __init cpu_detect(struct cpuinfo_x86 *c);
+@@ -560,7 +566,9 @@ static inline void xen_set_iopl_mask(uns
+ * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
+ * resulting in stale register contents being returned.
+ */
+-static inline void cpuid(unsigned int op, unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx)
++static inline void cpuid(unsigned int op,
++ unsigned int *eax, unsigned int *ebx,
++ unsigned int *ecx, unsigned int *edx)
+ {
+ *eax = op;
+ *ecx = 0;
+@@ -568,8 +576,9 @@ static inline void cpuid(unsigned int op
+ }
+
+ /* Some CPUID calls want 'count' to be placed in ecx */
+-static inline void cpuid_count(int op, int count, int *eax, int *ebx, int *ecx,
+- int *edx)
++static inline void cpuid_count(unsigned int op, int count,
++ unsigned int *eax, unsigned int *ebx,
++ unsigned int *ecx, unsigned int *edx)
+ {
+ *eax = op;
+ *ecx = count;
+@@ -639,6 +648,17 @@ static inline unsigned int cpuid_edx(uns
+ #define K7_NOP7 ".byte 0x8D,0x04,0x05,0,0,0,0\n"
+ #define K7_NOP8 K7_NOP7 ASM_NOP1
+
++/* P6 nops */
++/* uses eax dependencies (Intel-recommended choice) */
++#define P6_NOP1 GENERIC_NOP1
++#define P6_NOP2 ".byte 0x66,0x90\n"
++#define P6_NOP3 ".byte 0x0f,0x1f,0x00\n"
++#define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n"
++#define P6_NOP5 ".byte 0x0f,0x1f,0x44,0x00,0\n"
++#define P6_NOP6 ".byte 0x66,0x0f,0x1f,0x44,0x00,0\n"
++#define P6_NOP7 ".byte 0x0f,0x1f,0x80,0,0,0,0\n"
++#define P6_NOP8 ".byte 0x0f,0x1f,0x84,0x00,0,0,0,0\n"
++
+ #ifdef CONFIG_MK8
+ #define ASM_NOP1 K8_NOP1
+ #define ASM_NOP2 K8_NOP2
+@@ -657,6 +677,17 @@ static inline unsigned int cpuid_edx(uns
+ #define ASM_NOP6 K7_NOP6
+ #define ASM_NOP7 K7_NOP7
+ #define ASM_NOP8 K7_NOP8
++#elif defined(CONFIG_M686) || defined(CONFIG_MPENTIUMII) || \
++ defined(CONFIG_MPENTIUMIII) || defined(CONFIG_MPENTIUMM) || \
++ defined(CONFIG_MCORE2) || defined(CONFIG_PENTIUM4)
++#define ASM_NOP1 P6_NOP1
++#define ASM_NOP2 P6_NOP2
++#define ASM_NOP3 P6_NOP3
++#define ASM_NOP4 P6_NOP4
++#define ASM_NOP5 P6_NOP5
++#define ASM_NOP6 P6_NOP6
++#define ASM_NOP7 P6_NOP7
++#define ASM_NOP8 P6_NOP8
+ #else
+ #define ASM_NOP1 GENERIC_NOP1
+ #define ASM_NOP2 GENERIC_NOP2
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor_64.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -74,6 +74,7 @@ struct cpuinfo_x86 {
+ __u8 booted_cores; /* number of cores as seen by OS */
+ __u8 phys_proc_id; /* Physical Processor id. */
+ __u8 cpu_core_id; /* Core id. */
++ __u8 cpu_index; /* index into per_cpu list */
+ #endif
+ } ____cacheline_aligned;
+
+@@ -88,11 +89,12 @@ struct cpuinfo_x86 {
+ #define X86_VENDOR_UNKNOWN 0xff
+
+ #ifdef CONFIG_SMP
+-extern struct cpuinfo_x86 cpu_data[];
+-#define current_cpu_data cpu_data[smp_processor_id()]
++DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
++#define cpu_data(cpu) per_cpu(cpu_info, cpu)
++#define current_cpu_data cpu_data(smp_processor_id())
+ #else
+-#define cpu_data (&boot_cpu_data)
+-#define current_cpu_data boot_cpu_data
++#define cpu_data(cpu) boot_cpu_data
++#define current_cpu_data boot_cpu_data
+ #endif
+
+ extern char ignore_irq13;
+@@ -343,6 +345,16 @@ struct extended_sigtable {
+ };
+
+
++#if defined(CONFIG_MPSC) || defined(CONFIG_MCORE2)
++#define ASM_NOP1 P6_NOP1
++#define ASM_NOP2 P6_NOP2
++#define ASM_NOP3 P6_NOP3
++#define ASM_NOP4 P6_NOP4
++#define ASM_NOP5 P6_NOP5
++#define ASM_NOP6 P6_NOP6
++#define ASM_NOP7 P6_NOP7
++#define ASM_NOP8 P6_NOP8
++#else
+ #define ASM_NOP1 K8_NOP1
+ #define ASM_NOP2 K8_NOP2
+ #define ASM_NOP3 K8_NOP3
+@@ -351,6 +363,7 @@ struct extended_sigtable {
+ #define ASM_NOP6 K8_NOP6
+ #define ASM_NOP7 K8_NOP7
+ #define ASM_NOP8 K8_NOP8
++#endif
+
+ /* Opteron nops */
+ #define K8_NOP1 ".byte 0x90\n"
+@@ -362,6 +375,17 @@ struct extended_sigtable {
+ #define K8_NOP7 K8_NOP4 K8_NOP3
+ #define K8_NOP8 K8_NOP4 K8_NOP4
+
++/* P6 nops */
++/* uses eax dependencies (Intel-recommended choice) */
++#define P6_NOP1 ".byte 0x90\n"
++#define P6_NOP2 ".byte 0x66,0x90\n"
++#define P6_NOP3 ".byte 0x0f,0x1f,0x00\n"
++#define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n"
++#define P6_NOP5 ".byte 0x0f,0x1f,0x44,0x00,0\n"
++#define P6_NOP6 ".byte 0x66,0x0f,0x1f,0x44,0x00,0\n"
++#define P6_NOP7 ".byte 0x0f,0x1f,0x80,0,0,0,0\n"
++#define P6_NOP8 ".byte 0x0f,0x1f,0x84,0x00,0,0,0,0\n"
++
+ #define ASM_NOP_MAX 8
+
+ /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+@@ -377,12 +401,6 @@ static inline void sync_core(void)
+ asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory");
+ }
+
+-#define ARCH_HAS_PREFETCH
+-static inline void prefetch(void *x)
+-{
+- asm volatile("prefetcht0 (%0)" :: "r" (x));
+-}
+-
+ #define ARCH_HAS_PREFETCHW 1
+ static inline void prefetchw(void *x)
+ {
+@@ -398,11 +416,6 @@ static inline void prefetchw(void *x)
+
+ #define cpu_relax() rep_nop()
+
+-static inline void serialize_cpu(void)
+-{
+- __asm__ __volatile__ ("cpuid" : : : "ax", "bx", "cx", "dx");
+-}
+-
+ static inline void __monitor(const void *eax, unsigned long ecx,
+ unsigned long edx)
+ {
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/segment.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/segment.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "segment_32.h"
++#else
++# include "../../segment_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/smp.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/smp.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "smp_32.h"
++#else
++# include "smp_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/smp_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/smp_32.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/smp_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -11,7 +11,7 @@
+ #endif
+
+ #if defined(CONFIG_X86_LOCAL_APIC) && !defined(__ASSEMBLY__)
+-#include <asm/bitops.h>
++#include <linux/bitops.h>
+ #include <asm/mpspec.h>
+ #include <asm/apic.h>
+ #ifdef CONFIG_X86_IO_APIC
+@@ -30,8 +30,8 @@
+ extern void smp_alloc_memory(void);
+ extern int pic_mode;
+ extern int smp_num_siblings;
+-extern cpumask_t cpu_sibling_map[];
+-extern cpumask_t cpu_core_map[];
++DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
++DECLARE_PER_CPU(cpumask_t, cpu_core_map);
+
+ extern void (*mtrr_hook) (void);
+ extern void zap_low_mappings (void);
+@@ -39,9 +39,11 @@ extern void lock_ipi_call_lock(void);
+ extern void unlock_ipi_call_lock(void);
+
+ #define MAX_APICID 256
+-extern u8 x86_cpu_to_apicid[];
++extern u8 __initdata x86_cpu_to_apicid_init[];
++extern void *x86_cpu_to_apicid_ptr;
++DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
+
+-#define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
++#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
+
+ #ifdef CONFIG_HOTPLUG_CPU
+ extern void cpu_exit_clear(void);
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/smp_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/smp_64.h 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/smp_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -40,10 +40,19 @@ extern void lock_ipi_call_lock(void);
+ extern void unlock_ipi_call_lock(void);
+ extern int smp_num_siblings;
+ extern void smp_send_reschedule(int cpu);
++extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
++ void *info, int wait);
+
+-extern cpumask_t cpu_sibling_map[NR_CPUS];
+-extern cpumask_t cpu_core_map[NR_CPUS];
+-extern u8 cpu_llc_id[NR_CPUS];
++/*
++ * cpu_sibling_map and cpu_core_map now live
++ * in the per cpu area
++ *
++ * extern cpumask_t cpu_sibling_map[NR_CPUS];
++ * extern cpumask_t cpu_core_map[NR_CPUS];
++ */
++DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
++DECLARE_PER_CPU(cpumask_t, cpu_core_map);
++DECLARE_PER_CPU(u8, cpu_llc_id);
+
+ #define SMP_TRAMPOLINE_BASE 0x6000
+
+@@ -70,6 +79,8 @@ extern unsigned __cpuinitdata disabled_c
+
+ #endif /* CONFIG_SMP */
+
++#define safe_smp_processor_id() smp_processor_id()
++
+ #ifdef CONFIG_X86_LOCAL_APIC
+ static inline int hard_smp_processor_id(void)
+ {
+@@ -82,8 +93,9 @@ static inline int hard_smp_processor_id(
+ * Some lowlevel functions might want to know about
+ * the real APIC ID <-> CPU # mapping.
+ */
+-extern u8 x86_cpu_to_apicid[NR_CPUS]; /* physical ID */
+-extern u8 x86_cpu_to_log_apicid[NR_CPUS];
++extern u8 __initdata x86_cpu_to_apicid_init[];
++extern void *x86_cpu_to_apicid_ptr;
++DECLARE_PER_CPU(u8, x86_cpu_to_apicid); /* physical ID */
+ extern u8 bios_cpu_apicid[];
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+@@ -118,8 +130,9 @@ static __inline int logical_smp_processo
+ #endif
+
+ #ifdef CONFIG_SMP
+-#define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
++#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
+ #else
++extern unsigned int boot_cpu_id;
+ #define cpu_physical_id(cpu) boot_cpu_id
+ #endif /* !CONFIG_SMP */
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/swiotlb.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/swiotlb.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "swiotlb_32.h"
++#else
++# include "../../swiotlb.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "system_32.h"
++#else
++# include "system_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/system_32.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -9,6 +9,7 @@
+ #include <asm/hypervisor.h>
+
+ #ifdef __KERNEL__
++#define AT_VECTOR_SIZE_ARCH 2 /* entries in ARCH_DLINFO */
+
+ struct task_struct; /* one of the stranger aspects of C forward declarations.. */
+ extern struct task_struct * FASTCALL(__switch_to(struct task_struct *prev, struct task_struct *next));
+@@ -138,7 +139,7 @@ static inline unsigned long xen_read_cr4
+ {
+ unsigned long val;
+ /* This could fault if %cr4 does not exist */
+- asm("1: movl %%cr4, %0 \n"
++ asm volatile("1: movl %%cr4, %0 \n"
+ "2: \n"
+ ".section __ex_table,\"a\" \n"
+ ".long 1b,2b \n"
+@@ -157,6 +158,11 @@ static inline void xen_wbinvd(void)
+ asm volatile("wbinvd": : :"memory");
+ }
+
++static inline void clflush(volatile void *__p)
++{
++ asm volatile("clflush %0" : "+m" (*(char __force *)__p));
++}
++
+ #define read_cr0() (xen_read_cr0())
+ #define write_cr0(x) (xen_write_cr0(x))
+ #define read_cr2() (xen_read_cr2())
+@@ -207,6 +213,7 @@ static inline unsigned long get_limit(un
+
+ #define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
+ #define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
++#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM)
+
+ /**
+ * read_barrier_depends - Flush all pending reads that subsequents reads
+@@ -262,18 +269,18 @@ static inline unsigned long get_limit(un
+
+ #define read_barrier_depends() do { } while(0)
+
++#ifdef CONFIG_SMP
++#define smp_mb() mb()
++#ifdef CONFIG_X86_PPRO_FENCE
++# define smp_rmb() rmb()
++#else
++# define smp_rmb() barrier()
++#endif
+ #ifdef CONFIG_X86_OOSTORE
+-/* Actually there are no OOO store capable CPUs for now that do SSE,
+- but make it already an possibility. */
+-#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM)
++# define smp_wmb() wmb()
+ #else
+-#define wmb() __asm__ __volatile__ ("": : :"memory")
++# define smp_wmb() barrier()
+ #endif
+-
+-#ifdef CONFIG_SMP
+-#define smp_mb() mb()
+-#define smp_rmb() rmb()
+-#define smp_wmb() wmb()
+ #define smp_read_barrier_depends() read_barrier_depends()
+ #define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
+ #else
+@@ -300,5 +307,6 @@ extern unsigned long arch_align_stack(un
+ extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
+
+ void default_idle(void);
++void __show_registers(struct pt_regs *, int all);
+
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/system_64.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -11,8 +11,12 @@
+
+ #ifdef __KERNEL__
+
+-#define __STR(x) #x
+-#define STR(x) __STR(x)
++/* entries in ARCH_DLINFO: */
++#ifdef CONFIG_IA32_EMULATION
++# define AT_VECTOR_SIZE_ARCH 2
++#else
++# define AT_VECTOR_SIZE_ARCH 1
++#endif
+
+ #define __SAVE(reg,offset) "movq %%" #reg ",(14-" #offset ")*8(%%rsp)\n\t"
+ #define __RESTORE(reg,offset) "movq (14-" #offset ")*8(%%rsp),%%" #reg "\n\t"
+@@ -92,7 +96,7 @@ static inline void write_cr0(unsigned lo
+
+ #define read_cr3() ({ \
+ unsigned long __dummy; \
+- asm("movq %%cr3,%0" : "=r" (__dummy)); \
++ asm volatile("movq %%cr3,%0" : "=r" (__dummy)); \
+ machine_to_phys(__dummy); \
+ })
+
+@@ -105,7 +109,7 @@ static inline void write_cr3(unsigned lo
+ static inline unsigned long read_cr4(void)
+ {
+ unsigned long cr4;
+- asm("movq %%cr4,%0" : "=r" (cr4));
++ asm volatile("movq %%cr4,%0" : "=r" (cr4));
+ return cr4;
+ }
+
+@@ -131,12 +135,17 @@ static inline void write_cr8(unsigned lo
+
+ #endif /* __KERNEL__ */
+
++static inline void clflush(volatile void *__p)
++{
++ asm volatile("clflush %0" : "+m" (*(char __force *)__p));
++}
++
+ #define nop() __asm__ __volatile__ ("nop")
+
+ #ifdef CONFIG_SMP
+ #define smp_mb() mb()
+-#define smp_rmb() rmb()
+-#define smp_wmb() wmb()
++#define smp_rmb() barrier()
++#define smp_wmb() barrier()
+ #define smp_read_barrier_depends() do {} while(0)
+ #else
+ #define smp_mb() barrier()
+@@ -153,12 +162,8 @@ static inline void write_cr8(unsigned lo
+ */
+ #define mb() asm volatile("mfence":::"memory")
+ #define rmb() asm volatile("lfence":::"memory")
+-
+-#ifdef CONFIG_UNORDERED_IO
+ #define wmb() asm volatile("sfence" ::: "memory")
+-#else
+-#define wmb() asm volatile("" ::: "memory")
+-#endif
++
+ #define read_barrier_depends() do {} while(0)
+ #define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "tlbflush_32.h"
++#else
++# include "tlbflush_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/tlbflush_32.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_32.h 2008-12-01 11:36:55.000000000 +0100
+@@ -23,7 +23,6 @@
+ * - flush_tlb_page(vma, vmaddr) flushes one page
+ * - flush_tlb_range(vma, start, end) flushes a range of pages
+ * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
+- * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
+ *
+ * ..but the i386 has somewhat limited tlb flushing capabilities,
+ * and page-granular flushes are available only on i486 and up.
+@@ -97,10 +96,4 @@ static inline void flush_tlb_kernel_rang
+ flush_tlb_all();
+ }
+
+-static inline void flush_tlb_pgtables(struct mm_struct *mm,
+- unsigned long start, unsigned long end)
+-{
+- /* i386 does not keep any page table caches in TLB */
+-}
+-
+ #endif /* _I386_TLBFLUSH_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/tlbflush_64.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/tlbflush_64.h 2008-12-01 11:36:55.000000000 +0100
+@@ -28,7 +28,6 @@
+ * - flush_tlb_page(vma, vmaddr) flushes one page
+ * - flush_tlb_range(vma, start, end) flushes a range of pages
+ * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
+- * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
+ *
+ * x86-64 can only flush individual pages or full VMs. For a range flush
+ * we always do the full VM. Might be worth trying if for a small
+@@ -95,12 +94,4 @@ static inline void flush_tlb_kernel_rang
+ flush_tlb_all();
+ }
+
+-static inline void flush_tlb_pgtables(struct mm_struct *mm,
+- unsigned long start, unsigned long end)
+-{
+- /* x86_64 does not keep any page table caches in a software TLB.
+- The CPUs do in their hardware TLBs, but they are handled
+- by the normal TLB flushing algorithms. */
+-}
+-
+ #endif /* _X8664_TLBFLUSH_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/xor.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/xor.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,5 @@
++#ifdef CONFIG_X86_32
++# include "../../xor_32.h"
++#else
++# include "xor_64.h"
++#endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/mach_time.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/mach_time.h 2007-06-12 13:14:13.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/mach_time.h 2008-12-01 11:36:55.000000000 +0100
+@@ -1,111 +1,2 @@
+-/*
+- * include/asm-i386/mach-default/mach_time.h
+- *
+- * Machine specific set RTC function for generic.
+- * Split out from time.c by Osamu Tomita <tomita@cinet.co.jp>
+- */
+-#ifndef _MACH_TIME_H
+-#define _MACH_TIME_H
+-
+-#include <asm-i386/mc146818rtc.h>
+-
+-/* for check timing call set_rtc_mmss() 500ms */
+-/* used in arch/i386/time.c::do_timer_interrupt() */
+-#define USEC_AFTER 500000
+-#define USEC_BEFORE 500000
+-
+-/*
+- * In order to set the CMOS clock precisely, set_rtc_mmss has to be
+- * called 500 ms after the second nowtime has started, because when
+- * nowtime is written into the registers of the CMOS clock, it will
+- * jump to the next second precisely 500 ms later. Check the Motorola
+- * MC146818A or Dallas DS12887 data sheet for details.
+- *
+- * BUG: This routine does not handle hour overflow properly; it just
+- * sets the minutes. Usually you'll only notice that after reboot!
+- */
+-static inline int mach_set_rtc_mmss(unsigned long nowtime)
+-{
+- int retval = 0;
+- int real_seconds, real_minutes, cmos_minutes;
+- unsigned char save_control, save_freq_select;
+-
+- save_control = CMOS_READ(RTC_CONTROL); /* tell the clock it's being set */
+- CMOS_WRITE((save_control|RTC_SET), RTC_CONTROL);
+-
+- save_freq_select = CMOS_READ(RTC_FREQ_SELECT); /* stop and reset prescaler */
+- CMOS_WRITE((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
+-
+- cmos_minutes = CMOS_READ(RTC_MINUTES);
+- if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
+- BCD_TO_BIN(cmos_minutes);
+-
+- /*
+- * since we're only adjusting minutes and seconds,
+- * don't interfere with hour overflow. This avoids
+- * messing with unknown time zones but requires your
+- * RTC not to be off by more than 15 minutes
+- */
+- real_seconds = nowtime % 60;
+- real_minutes = nowtime / 60;
+- if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
+- real_minutes += 30; /* correct for half hour time zone */
+- real_minutes %= 60;
+-
+- if (abs(real_minutes - cmos_minutes) < 30) {
+- if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+- BIN_TO_BCD(real_seconds);
+- BIN_TO_BCD(real_minutes);
+- }
+- CMOS_WRITE(real_seconds,RTC_SECONDS);
+- CMOS_WRITE(real_minutes,RTC_MINUTES);
+- } else {
+- printk(KERN_WARNING
+- "set_rtc_mmss: can't update from %d to %d\n",
+- cmos_minutes, real_minutes);
+- retval = -1;
+- }
+-
+- /* The following flags have to be released exactly in this order,
+- * otherwise the DS12887 (popular MC146818A clone with integrated
+- * battery and quartz) will not reset the oscillator and will not
+- * update precisely 500 ms later. You won't find this mentioned in
+- * the Dallas Semiconductor data sheets, but who believes data
+- * sheets anyway ... -- Markus Kuhn
+- */
+- CMOS_WRITE(save_control, RTC_CONTROL);
+- CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
+-
+- return retval;
+-}
+-
+-static inline unsigned long mach_get_cmos_time(void)
+-{
+- unsigned int year, mon, day, hour, min, sec;
+-
+- do {
+- sec = CMOS_READ(RTC_SECONDS);
+- min = CMOS_READ(RTC_MINUTES);
+- hour = CMOS_READ(RTC_HOURS);
+- day = CMOS_READ(RTC_DAY_OF_MONTH);
+- mon = CMOS_READ(RTC_MONTH);
+- year = CMOS_READ(RTC_YEAR);
+- } while (sec != CMOS_READ(RTC_SECONDS));
+-
+- if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+- BCD_TO_BIN(sec);
+- BCD_TO_BIN(min);
+- BCD_TO_BIN(hour);
+- BCD_TO_BIN(day);
+- BCD_TO_BIN(mon);
+- BCD_TO_BIN(year);
+- }
+-
+- year += 1900;
+- if (year < 1970)
+- year += 100;
+-
+- return mktime(year, mon, day, hour, min, sec);
+-}
+-
+-#endif /* !_MACH_TIME_H */
++#include "../mc146818rtc_32.h"
++#include "../mach-default/mach_time.h"
+Index: head-2008-12-01/include/asm-x86/mach-xen/mach_timer.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/mach_timer.h 2007-06-12 13:14:13.000000000 +0200
++++ head-2008-12-01/include/asm-x86/mach-xen/mach_timer.h 2008-12-01 11:36:55.000000000 +0100
+@@ -1,50 +1 @@
+-/*
+- * include/asm-i386/mach-default/mach_timer.h
+- *
+- * Machine specific calibrate_tsc() for generic.
+- * Split out from timer_tsc.c by Osamu Tomita <tomita@cinet.co.jp>
+- */
+-/* ------ Calibrate the TSC -------
+- * Return 2^32 * (1 / (TSC clocks per usec)) for do_fast_gettimeoffset().
+- * Too much 64-bit arithmetic here to do this cleanly in C, and for
+- * accuracy's sake we want to keep the overhead on the CTC speaker (channel 2)
+- * output busy loop as low as possible. We avoid reading the CTC registers
+- * directly because of the awkward 8-bit access mechanism of the 82C54
+- * device.
+- */
+-#ifndef _MACH_TIMER_H
+-#define _MACH_TIMER_H
+-
+-#define CALIBRATE_TIME_MSEC 30 /* 30 msecs */
+-#define CALIBRATE_LATCH \
+- ((CLOCK_TICK_RATE * CALIBRATE_TIME_MSEC + 1000/2)/1000)
+-
+-static inline void mach_prepare_counter(void)
+-{
+- /* Set the Gate high, disable speaker */
+- outb((inb(0x61) & ~0x02) | 0x01, 0x61);
+-
+- /*
+- * Now let's take care of CTC channel 2
+- *
+- * Set the Gate high, program CTC channel 2 for mode 0,
+- * (interrupt on terminal count mode), binary count,
+- * load 5 * LATCH count, (LSB and MSB) to begin countdown.
+- *
+- * Some devices need a delay here.
+- */
+- outb(0xb0, 0x43); /* binary, mode 0, LSB/MSB, Ch 2 */
+- outb_p(CALIBRATE_LATCH & 0xff, 0x42); /* LSB of count */
+- outb_p(CALIBRATE_LATCH >> 8, 0x42); /* MSB of count */
+-}
+-
+-static inline void mach_countup(unsigned long *count_p)
+-{
+- unsigned long count = 0;
+- do {
+- count++;
+- } while ((inb_p(0x61) & 0x20) == 0);
+- *count_p = count;
+-}
+-
+-#endif /* !_MACH_TIMER_H */
++#include "../mach-default/mach_timer.h"
+Index: head-2008-12-01/include/asm-x86/mmu.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mmu.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mmu.h 2008-12-01 11:36:55.000000000 +0100
+@@ -16,6 +16,9 @@ typedef struct {
+ rwlock_t ldtlock;
+ #endif
+ int size;
++#ifdef CONFIG_XEN
++ unsigned has_foreign_mappings:1;
++#endif
+ struct mutex lock;
+ void *vdso;
+ } mm_context_t;
+Index: head-2008-12-01/include/linux/sysctl.h
+===================================================================
+--- head-2008-12-01.orig/include/linux/sysctl.h 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/include/linux/sysctl.h 2008-12-01 11:36:55.000000000 +0100
+@@ -69,6 +69,7 @@ enum
+ CTL_BUS=8, /* Busses */
+ CTL_ABI=9, /* Binary emulation */
+ CTL_CPU=10, /* CPU stuff (speed scaling, etc) */
++ CTL_XEN=123, /* Xen info and control */
+ CTL_ARLAN=254, /* arlan wireless driver */
+ CTL_S390DBF=5677, /* s390 debug */
+ CTL_SUNRPC=7249, /* sunrpc debug */
+Index: head-2008-12-01/include/xen/pcifront.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/pcifront.h 2007-06-18 08:38:13.000000000 +0200
++++ head-2008-12-01/include/xen/pcifront.h 2008-12-01 11:36:55.000000000 +0100
+@@ -12,13 +12,11 @@
+
+ #ifndef __ia64__
+
++#include <asm/pci.h>
++
+ struct pcifront_device;
+ struct pci_bus;
+-
+-struct pcifront_sd {
+- int domain;
+- struct pcifront_device *pdev;
+-};
++#define pcifront_sd pci_sysdata
+
+ static inline struct pcifront_device *
+ pcifront_get_pdev(struct pcifront_sd *sd)
+@@ -34,18 +32,6 @@ static inline void pcifront_init_sd(stru
+ sd->pdev = pdev;
+ }
+
+-#if defined(CONFIG_PCI_DOMAINS)
+-static inline int pci_domain_nr(struct pci_bus *bus)
+-{
+- struct pcifront_sd *sd = bus->sysdata;
+- return sd->domain;
+-}
+-static inline int pci_proc_domain(struct pci_bus *bus)
+-{
+- return pci_domain_nr(bus);
+-}
+-#endif /* CONFIG_PCI_DOMAINS */
+-
+ static inline void pcifront_setup_root_resources(struct pci_bus *bus,
+ struct pcifront_sd *sd)
+ {
+Index: head-2008-12-01/include/xen/sysctl.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/xen/sysctl.h 2008-12-01 11:36:55.000000000 +0100
+@@ -0,0 +1,11 @@
++#ifndef _XEN_SYSCTL_H
++#define _XEN_SYSCTL_H
++
++/* CTL_XEN names: */
++enum
++{
++ CTL_XEN_INDEPENDENT_WALLCLOCK=1,
++ CTL_XEN_PERMITTED_CLOCK_JITTER=2,
++};
++
++#endif /* _XEN_SYSCTL_H */
+Index: head-2008-12-01/include/xen/xenbus.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/xenbus.h 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/include/xen/xenbus.h 2008-12-01 11:36:55.000000000 +0100
+@@ -107,7 +107,7 @@ struct xenbus_driver {
+ int (*suspend)(struct xenbus_device *dev);
+ int (*suspend_cancel)(struct xenbus_device *dev);
+ int (*resume)(struct xenbus_device *dev);
+- int (*uevent)(struct xenbus_device *, char **, int, char *, int);
++ int (*uevent)(struct xenbus_device *, struct kobj_uevent_env *);
+ struct device_driver driver;
+ int (*read_otherend_details)(struct xenbus_device *dev);
+ int (*is_ready)(struct xenbus_device *dev);
+Index: head-2008-12-01/kernel/kexec.c
+===================================================================
+--- head-2008-12-01.orig/kernel/kexec.c 2008-12-01 11:32:38.000000000 +0100
++++ head-2008-12-01/kernel/kexec.c 2008-12-01 11:36:55.000000000 +0100
+@@ -1235,6 +1235,7 @@ static int __init crash_notes_memory_ini
+ module_init(crash_notes_memory_init)
+
+
++#ifndef CONFIG_XEN
+ /*
+ * parsing the "crashkernel" commandline
+ *
+@@ -1397,7 +1398,7 @@ int __init parse_crashkernel(char *cm
+
+ return 0;
+ }
+-
++#endif
+
+
+ void crash_save_vmcoreinfo(void)
+@@ -1454,7 +1455,18 @@ static int __init crash_save_vmcoreinfo_
+
+ VMCOREINFO_SYMBOL(init_uts_ns);
+ VMCOREINFO_SYMBOL(node_online_map);
++#ifndef CONFIG_X86_XEN
++ VMCOREINFO_SYMBOL(swapper_pg_dir);
++#else
++/*
++ * Since for x86-32 Xen swapper_pg_dir is a pointer rather than an array,
++ * make the value stored consistent with native (i.e. the base address of
++ * the page directory).
++ */
++# define swapper_pg_dir *swapper_pg_dir
+ VMCOREINFO_SYMBOL(swapper_pg_dir);
++# undef swapper_pg_dir
++#endif
+ VMCOREINFO_SYMBOL(_stext);
+
+ #ifndef CONFIG_NEED_MULTIPLE_NODES
+Index: head-2008-12-01/kernel/sysctl_check.c
+===================================================================
+--- head-2008-12-01.orig/kernel/sysctl_check.c 2008-12-01 10:53:14.000000000 +0100
++++ head-2008-12-01/kernel/sysctl_check.c 2008-12-01 11:36:55.000000000 +0100
+@@ -4,6 +4,7 @@
+ #include <linux/sunrpc/debug.h>
+ #include <linux/string.h>
+ #include <net/ip_vs.h>
++#include <xen/sysctl.h>
+
+ struct trans_ctl_table {
+ int ctl_name;
+@@ -897,6 +898,14 @@ static const struct trans_ctl_table tran
+ {}
+ };
+
++#ifdef CONFIG_XEN
++static struct trans_ctl_table trans_xen_table[] = {
++ { CTL_XEN_INDEPENDENT_WALLCLOCK, "independent_wallclock" },
++ { CTL_XEN_PERMITTED_CLOCK_JITTER, "permitted_clock_jitter" },
++ {}
++};
++#endif
++
+ static const struct trans_ctl_table trans_arlan_conf_table0[] = {
+ { 1, "spreadingCode" },
+ { 2, "channelNumber" },
+@@ -1232,6 +1241,9 @@ static const struct trans_ctl_table tran
+ { CTL_BUS, "bus", trans_bus_table },
+ { CTL_ABI, "abi" },
+ /* CTL_CPU not used */
++#ifdef CONFIG_XEN
++ { CTL_XEN, "xen", trans_xen_table },
++#endif
+ { CTL_ARLAN, "arlan", trans_arlan_table },
+ { CTL_S390DBF, "s390dbf", trans_s390dbf_table },
+ { CTL_SUNRPC, "sunrpc", trans_sunrpc_table },
+Index: head-2008-12-01/lib/swiotlb-xen.c
+===================================================================
+--- head-2008-12-01.orig/lib/swiotlb-xen.c 2008-12-01 11:36:13.000000000 +0100
++++ head-2008-12-01/lib/swiotlb-xen.c 2008-12-01 11:36:55.000000000 +0100
+@@ -27,7 +27,7 @@
+ #include <asm/uaccess.h>
+ #include <xen/gnttab.h>
+ #include <xen/interface/memory.h>
+-#include <asm-i386/mach-xen/asm/gnttab_dma.h>
++#include <asm/gnttab_dma.h>
+
+ int swiotlb;
+ EXPORT_SYMBOL(swiotlb);
+@@ -574,9 +574,10 @@ swiotlb_sync_single_for_device(struct de
+ * same here.
+ */
+ int
+-swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nelems,
++swiotlb_map_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
+ int dir)
+ {
++ struct scatterlist *sg;
+ struct phys_addr buffer;
+ dma_addr_t dev_addr;
+ char *map;
+@@ -584,22 +585,22 @@ swiotlb_map_sg(struct device *hwdev, str
+
+ BUG_ON(dir == DMA_NONE);
+
+- for (i = 0; i < nelems; i++, sg++) {
+- dev_addr = gnttab_dma_map_page(sg->page) + sg->offset;
++ for_each_sg(sgl, sg, nelems, i) {
++ dev_addr = gnttab_dma_map_page(sg_page(sg)) + sg->offset;
+
+- if (range_straddles_page_boundary(page_to_pseudophys(sg->page)
++ if (range_straddles_page_boundary(page_to_pseudophys(sg_page(sg))
+ + sg->offset, sg->length)
+ || address_needs_mapping(hwdev, dev_addr)) {
+ gnttab_dma_unmap_page(dev_addr);
+- buffer.page = sg->page;
++ buffer.page = sg_page(sg);
+ buffer.offset = sg->offset;
+ map = map_single(hwdev, buffer, sg->length, dir);
+ if (!map) {
+ /* Don't panic here, we expect map_sg users
+ to do proper error handling. */
+ swiotlb_full(hwdev, sg->length, dir, 0);
+- swiotlb_unmap_sg(hwdev, sg - i, i, dir);
+- sg[0].dma_length = 0;
++ swiotlb_unmap_sg(hwdev, sgl, i, dir);
++ sgl[0].dma_length = 0;
+ return 0;
+ }
+ sg->dma_address = virt_to_bus(map);
+@@ -615,19 +616,21 @@ swiotlb_map_sg(struct device *hwdev, str
+ * concerning calls here are the same as for swiotlb_unmap_single() above.
+ */
+ void
+-swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nelems,
++swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
+ int dir)
+ {
++ struct scatterlist *sg;
+ int i;
+
+ BUG_ON(dir == DMA_NONE);
+
+- for (i = 0; i < nelems; i++, sg++)
++ for_each_sg(sgl, sg, nelems, i) {
+ if (in_swiotlb_aperture(sg->dma_address))
+ unmap_single(hwdev, bus_to_virt(sg->dma_address),
+ sg->dma_length, dir);
+ else
+ gnttab_dma_unmap_page(sg->dma_address);
++ }
+ }
+
+ /*
+@@ -638,31 +641,35 @@ swiotlb_unmap_sg(struct device *hwdev, s
+ * and usage.
+ */
+ void
+-swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
++swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sgl,
+ int nelems, int dir)
+ {
++ struct scatterlist *sg;
+ int i;
+
+ BUG_ON(dir == DMA_NONE);
+
+- for (i = 0; i < nelems; i++, sg++)
++ for_each_sg(sgl, sg, nelems, i) {
+ if (in_swiotlb_aperture(sg->dma_address))
+ sync_single(hwdev, bus_to_virt(sg->dma_address),
+ sg->dma_length, dir);
++ }
+ }
+
+ void
+-swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
++swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sgl,
+ int nelems, int dir)
+ {
++ struct scatterlist *sg;
+ int i;
+
+ BUG_ON(dir == DMA_NONE);
+
+- for (i = 0; i < nelems; i++, sg++)
++ for_each_sg(sgl, sg, nelems, i) {
+ if (in_swiotlb_aperture(sg->dma_address))
+ sync_single(hwdev, bus_to_virt(sg->dma_address),
+ sg->dma_length, dir);
++ }
+ }
+
+ #ifdef CONFIG_HIGHMEM
--- /dev/null
+From: kernel.org
+Subject: 2.6.25
+Patch-mainline: 2.6.25
+
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+Automatically created from "patches.kernel.org/patch-2.6.25" by xen-port-patches.py
+
+---
+ arch/x86/Kconfig | 18
+ arch/x86/Kconfig.debug | 1
+ arch/x86/ia32/ia32entry-xen.S | 12
+ arch/x86/kernel/Makefile | 3
+ arch/x86/kernel/acpi/boot.c | 3
+ arch/x86/kernel/acpi/sleep-xen.c | 95 +
+ arch/x86/kernel/acpi/sleep_32-xen.c | 117 --
+ arch/x86/kernel/acpi/sleep_64-xen.c | 125 --
+ arch/x86/kernel/apic_32-xen.c | 2
+ arch/x86/kernel/apic_64-xen.c | 73 -
+ arch/x86/kernel/asm-offsets_32.c | 2
+ arch/x86/kernel/cpu/common-xen.c | 214 +--
+ arch/x86/kernel/cpu/mtrr/main-xen.c | 19
+ arch/x86/kernel/e820_32-xen.c | 275 -----
+ arch/x86/kernel/e820_64-xen.c | 485 +++++---
+ arch/x86/kernel/early_printk-xen.c | 2
+ arch/x86/kernel/entry_32-xen.S | 195 +++
+ arch/x86/kernel/entry_64-xen.S | 91 -
+ arch/x86/kernel/fixup.c | 2
+ arch/x86/kernel/genapic_64-xen.c | 15
+ arch/x86/kernel/head64-xen.c | 63 +
+ arch/x86/kernel/head_32-xen.S | 3
+ arch/x86/kernel/init_task-xen.c | 2
+ arch/x86/kernel/io_apic_32-xen.c | 15
+ arch/x86/kernel/io_apic_64-xen.c | 110 +-
+ arch/x86/kernel/ioport-xen.c | 112 ++
+ arch/x86/kernel/ioport_32-xen.c | 121 --
+ arch/x86/kernel/ioport_64-xen.c | 99 -
+ arch/x86/kernel/irq_32-xen.c | 22
+ arch/x86/kernel/irq_64-xen.c | 43
+ arch/x86/kernel/ldt-xen.c | 272 +++++
+ arch/x86/kernel/ldt_32-xen.c | 265 ----
+ arch/x86/kernel/ldt_64-xen.c | 271 ----
+ arch/x86/kernel/machine_kexec_64.c | 2
+ arch/x86/kernel/microcode-xen.c | 2
+ arch/x86/kernel/mpparse_32-xen.c | 49
+ arch/x86/kernel/mpparse_64-xen.c | 30
+ arch/x86/kernel/pci-dma-xen.c | 20
+ arch/x86/kernel/process_32-xen.c | 438 ++------
+ arch/x86/kernel/process_64-xen.c | 303 ++---
+ arch/x86/kernel/quirks-xen.c | 82 -
+ arch/x86/kernel/rtc.c | 8
+ arch/x86/kernel/setup64-xen.c | 70 +
+ arch/x86/kernel/setup_32-xen.c | 311 ++++-
+ arch/x86/kernel/setup_64-xen.c | 686 ++++++------
+ arch/x86/kernel/smp_32-xen.c | 5
+ arch/x86/kernel/smp_64-xen.c | 91 -
+ arch/x86/kernel/time_32-xen.c | 136 --
+ arch/x86/kernel/traps_32-xen.c | 320 +++--
+ arch/x86/kernel/traps_64-xen.c | 371 +++---
+ arch/x86/kernel/vsyscall_64-xen.c | 60 -
+ arch/x86/kernel/xen_entry_64.S | 36
+ arch/x86/mach-xen/setup.c | 11
+ arch/x86/mm/fault-xen.c | 1026 ++++++++++++++++++
+ arch/x86/mm/fault_32-xen.c | 757 -------------
+ arch/x86/mm/fault_64-xen.c | 686 ------------
+ arch/x86/mm/highmem_32-xen.c | 45
+ arch/x86/mm/hypervisor.c | 10
+ arch/x86/mm/init_32-xen.c | 464 +++-----
+ arch/x86/mm/init_64-xen.c | 517 ++++-----
+ arch/x86/mm/ioremap-xen.c | 685 ++++++++++++
+ arch/x86/mm/ioremap_32-xen.c | 445 --------
+ arch/x86/mm/pageattr-xen.c | 1412 ++++++++++++++++++++++++++
+ arch/x86/mm/pageattr_64-xen.c | 542 ---------
+ arch/x86/mm/pgtable_32-xen.c | 672 ++----------
+ arch/x86/pci/irq-xen.c | 24
+ arch/x86/vdso/Makefile | 1
+ arch/x86/vdso/vdso32-setup-xen.c | 506 +++++++++
+ arch/x86/vdso/vdso32-setup.c | 34
+ arch/x86/vdso/vdso32.S | 12
+ arch/x86/vdso/vdso32/syscall.S | 2
+ drivers/pci/msi-xen.c | 98 -
+ drivers/pci/pci.c | 5
+ drivers/xen/balloon/sysfs.c | 2
+ drivers/xen/blkback/blkback.c | 5
+ drivers/xen/blkfront/blkfront.c | 9
+ drivers/xen/blktap/blktap.c | 8
+ drivers/xen/core/Makefile | 1
+ drivers/xen/core/evtchn.c | 46
+ drivers/xen/core/hypervisor_sysfs.c | 2
+ drivers/xen/core/smpboot.c | 29
+ drivers/xen/core/spinlock.c | 161 ++
+ drivers/xen/core/xen_sysfs.c | 30
+ drivers/xen/gntdev/gntdev.c | 4
+ drivers/xen/scsifront/scsifront.c | 49
+ drivers/xen/xenoprof/xenoprofile.c | 2
+ include/asm-x86/mach-xen/asm/agp.h | 9
+ include/asm-x86/mach-xen/asm/desc.h | 403 +++++++
+ include/asm-x86/mach-xen/asm/desc_32.h | 262 ----
+ include/asm-x86/mach-xen/asm/desc_64.h | 228 ----
+ include/asm-x86/mach-xen/asm/dma-mapping_32.h | 18
+ include/asm-x86/mach-xen/asm/fixmap_32.h | 24
+ include/asm-x86/mach-xen/asm/fixmap_64.h | 25
+ include/asm-x86/mach-xen/asm/highmem.h | 10
+ include/asm-x86/mach-xen/asm/hypervisor.h | 19
+ include/asm-x86/mach-xen/asm/io_32.h | 69 -
+ include/asm-x86/mach-xen/asm/io_64.h | 62 -
+ include/asm-x86/mach-xen/asm/irqflags.h | 248 ++++
+ include/asm-x86/mach-xen/asm/irqflags_32.h | 212 ---
+ include/asm-x86/mach-xen/asm/irqflags_64.h | 178 ---
+ include/asm-x86/mach-xen/asm/maddr_32.h | 21
+ include/asm-x86/mach-xen/asm/maddr_64.h | 19
+ include/asm-x86/mach-xen/asm/mmu_context_32.h | 2
+ include/asm-x86/mach-xen/asm/mmu_context_64.h | 12
+ include/asm-x86/mach-xen/asm/page.h | 238 ++++
+ include/asm-x86/mach-xen/asm/page_64.h | 196 ---
+ include/asm-x86/mach-xen/asm/pci.h | 17
+ include/asm-x86/mach-xen/asm/pci_64.h | 1
+ include/asm-x86/mach-xen/asm/pgalloc_32.h | 116 +-
+ include/asm-x86/mach-xen/asm/pgalloc_64.h | 87 -
+ include/asm-x86/mach-xen/asm/pgtable-3level.h | 107 -
+ include/asm-x86/mach-xen/asm/pgtable.h | 449 ++++++++
+ include/asm-x86/mach-xen/asm/pgtable_32.h | 361 ------
+ include/asm-x86/mach-xen/asm/pgtable_64.h | 400 +------
+ include/asm-x86/mach-xen/asm/processor.h | 792 ++++++++++++++
+ include/asm-x86/mach-xen/asm/processor_32.h | 751 -------------
+ include/asm-x86/mach-xen/asm/processor_64.h | 461 --------
+ include/asm-x86/mach-xen/asm/segment.h | 203 +++
+ include/asm-x86/mach-xen/asm/segment_32.h | 150 --
+ include/asm-x86/mach-xen/asm/smp_32.h | 125 +-
+ include/asm-x86/mach-xen/asm/smp_64.h | 138 --
+ include/asm-x86/mach-xen/asm/spinlock.h | 333 ++++++
+ include/asm-x86/mach-xen/asm/system.h | 392 +++++++
+ include/asm-x86/mach-xen/asm/system_32.h | 312 -----
+ include/asm-x86/mach-xen/asm/system_64.h | 159 --
+ include/asm-x86/mach-xen/asm/tlbflush.h | 105 +
+ include/asm-x86/mach-xen/asm/tlbflush_32.h | 99 -
+ include/asm-x86/mach-xen/asm/tlbflush_64.h | 97 -
+ include/asm-x86/mach-xen/irq_vectors.h | 3
+ include/asm-x86/mmu.h | 2
+ include/asm-x86/ptrace.h | 4
+ include/asm-x86/thread_info.h | 12
+ include/asm-x86/time.h | 6
+ include/linux/page-flags.h | 4
+ include/linux/pci.h | 3
+ include/xen/evtchn.h | 25
+ kernel/sysctl_check.c | 2
+ lib/swiotlb-xen.c | 35
+ 138 files changed, 11322 insertions(+), 11153 deletions(-)
+
+--- a/arch/x86/ia32/ia32entry-xen.S
++++ b/arch/x86/ia32/ia32entry-xen.S
+@@ -12,7 +12,6 @@
+ #include <asm/ia32_unistd.h>
+ #include <asm/thread_info.h>
+ #include <asm/segment.h>
+-#include <asm/vsyscall32.h>
+ #include <asm/irqflags.h>
+ #include <linux/linkage.h>
+
+@@ -99,10 +98,11 @@ ENTRY(ia32_sysenter_target)
+ CFI_RESTORE rcx
+ movl %ebp,%ebp /* zero extension */
+ movl %eax,%eax
++ movl 48-THREAD_SIZE+threadinfo_sysenter_return(%rsp),%r10d
+ movl $__USER32_DS,40(%rsp)
+ movq %rbp,32(%rsp)
+ movl $__USER32_CS,16(%rsp)
+- movl $VSYSCALL32_SYSEXIT,8(%rsp)
++ movq %r10,8(%rsp)
+ movq %rax,(%rsp)
+ cld
+ SAVE_ARGS 0,0,1
+@@ -582,8 +582,8 @@ ia32_sys_call_table:
+ .quad compat_sys_futex /* 240 */
+ .quad compat_sys_sched_setaffinity
+ .quad compat_sys_sched_getaffinity
+- .quad sys32_set_thread_area
+- .quad sys32_get_thread_area
++ .quad sys_set_thread_area
++ .quad sys_get_thread_area
+ .quad compat_sys_io_setup /* 245 */
+ .quad sys_io_destroy
+ .quad compat_sys_io_getevents
+@@ -661,7 +661,9 @@ ia32_sys_call_table:
+ .quad sys_epoll_pwait
+ .quad compat_sys_utimensat /* 320 */
+ .quad compat_sys_signalfd
+- .quad compat_sys_timerfd
++ .quad sys_timerfd_create
+ .quad sys_eventfd
+ .quad sys32_fallocate
++ .quad compat_sys_timerfd_settime /* 325 */
++ .quad compat_sys_timerfd_gettime
+ ia32_syscall_end:
+--- a/arch/x86/Kconfig
++++ b/arch/x86/Kconfig
+@@ -27,7 +27,7 @@ config X86
+ select HAVE_KRETPROBES
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_FTRACE
+- select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)
++ select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64) && !XEN
+ select HAVE_ARCH_KGDB if !X86_VOYAGER
+ select HAVE_ARCH_TRACEHOOK
+ select HAVE_GENERIC_DMA_COHERENT if X86_32
+@@ -208,14 +208,12 @@ config X86_TRAMPOLINE
+ default y
+
+ config X86_NO_TSS
+- bool
++ def_bool y
+ depends on XEN
+- default y
+
+ config X86_NO_IDT
+- bool
++ def_bool y
+ depends on XEN
+- default y
+
+ config KTIME_SCALAR
+ def_bool X86_32
+@@ -724,9 +722,8 @@ config X86_VISWS_APIC
+ depends on X86_32 && X86_VISWS
+
+ config X86_XEN_GENAPIC
+- bool
++ def_bool y
+ depends on X86_64_XEN
+- default y
+
+ config X86_MCE
+ bool "Machine Check Exception"
+@@ -1113,7 +1110,7 @@ config ARCH_DISCONTIGMEM_DEFAULT
+
+ config ARCH_SPARSEMEM_DEFAULT
+ def_bool y
+- depends on X86_64
++ depends on X86_64 && !X86_64_XEN
+
+ config ARCH_SPARSEMEM_ENABLE
+ def_bool y
+@@ -1743,10 +1740,10 @@ config PCI_MMCONFIG
+ depends on X86_64 && PCI && ACPI
+
+ config XEN_PCIDEV_FRONTEND
+- bool "Xen PCI Frontend" if X86_64
++ def_bool y
++ prompt "Xen PCI Frontend" if X86_64
+ depends on PCI && XEN && (PCI_GOXEN_FE || PCI_GOANY || X86_64)
+ select HOTPLUG
+- default y
+ help
+ The PCI device frontend driver allows the kernel to import arbitrary
+ PCI devices from a PCI backend to support PCI driver domains.
+@@ -1754,7 +1751,6 @@ config XEN_PCIDEV_FRONTEND
+ config XEN_PCIDEV_FE_DEBUG
+ bool "Xen PCI Frontend Debugging"
+ depends on XEN_PCIDEV_FRONTEND
+- default n
+ help
+ Enables some debug statements within the PCI Frontend.
+
+--- a/arch/x86/Kconfig.debug
++++ b/arch/x86/Kconfig.debug
+@@ -266,6 +266,7 @@ config DEBUG_BOOT_PARAMS
+ bool "Debug boot parameters"
+ depends on DEBUG_KERNEL
+ depends on DEBUG_FS
++ depends on !XEN
+ help
+ This option will cause struct boot_params to be exported via debugfs.
+
+--- a/arch/x86/kernel/acpi/boot.c
++++ b/arch/x86/kernel/acpi/boot.c
+@@ -133,6 +133,9 @@ char *__init __acpi_map_table(unsigned l
+ #ifndef CONFIG_XEN
+ if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
+ return __va(phys);
++#else
++ if (phys + size <= (NR_FIX_ISAMAPS << PAGE_SHIFT))
++ return isa_bus_to_virt(phys);
+ #endif
+
+ offset = phys & (PAGE_SIZE - 1);
+--- a/arch/x86/kernel/acpi/sleep_32-xen.c
++++ /dev/null
+@@ -1,117 +0,0 @@
+-/*
+- * sleep.c - x86-specific ACPI sleep support.
+- *
+- * Copyright (C) 2001-2003 Patrick Mochel
+- * Copyright (C) 2001-2003 Pavel Machek <pavel@suse.cz>
+- */
+-
+-#include <linux/acpi.h>
+-#include <linux/bootmem.h>
+-#include <linux/dmi.h>
+-#include <linux/cpumask.h>
+-
+-#include <asm/smp.h>
+-
+-#ifndef CONFIG_ACPI_PV_SLEEP
+-/* address in low memory of the wakeup routine. */
+-unsigned long acpi_wakeup_address = 0;
+-unsigned long acpi_realmode_flags;
+-extern char wakeup_start, wakeup_end;
+-
+-extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
+-#endif
+-
+-/**
+- * acpi_save_state_mem - save kernel state
+- *
+- * Create an identity mapped page table and copy the wakeup routine to
+- * low memory.
+- */
+-int acpi_save_state_mem(void)
+-{
+-#ifndef CONFIG_ACPI_PV_SLEEP
+- if (!acpi_wakeup_address)
+- return 1;
+- memcpy((void *)acpi_wakeup_address, &wakeup_start,
+- &wakeup_end - &wakeup_start);
+- acpi_copy_wakeup_routine(acpi_wakeup_address);
+-#endif
+- return 0;
+-}
+-
+-/*
+- * acpi_restore_state - undo effects of acpi_save_state_mem
+- */
+-void acpi_restore_state_mem(void)
+-{
+-}
+-
+-/**
+- * acpi_reserve_bootmem - do _very_ early ACPI initialisation
+- *
+- * We allocate a page from the first 1MB of memory for the wakeup
+- * routine for when we come back from a sleep state. The
+- * runtime allocator allows specification of <16MB pages, but not
+- * <1MB pages.
+- */
+-void __init acpi_reserve_bootmem(void)
+-{
+-#ifndef CONFIG_ACPI_PV_SLEEP
+- if ((&wakeup_end - &wakeup_start) > PAGE_SIZE) {
+- printk(KERN_ERR
+- "ACPI: Wakeup code way too big, S3 disabled.\n");
+- return;
+- }
+-
+- acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE);
+- if (!acpi_wakeup_address)
+- printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
+-#endif
+-}
+-
+-#ifndef CONFIG_ACPI_PV_SLEEP
+-static int __init acpi_sleep_setup(char *str)
+-{
+- while ((str != NULL) && (*str != '\0')) {
+- if (strncmp(str, "s3_bios", 7) == 0)
+- acpi_realmode_flags |= 1;
+- if (strncmp(str, "s3_mode", 7) == 0)
+- acpi_realmode_flags |= 2;
+- if (strncmp(str, "s3_beep", 7) == 0)
+- acpi_realmode_flags |= 4;
+- str = strchr(str, ',');
+- if (str != NULL)
+- str += strspn(str, ", \t");
+- }
+- return 1;
+-}
+-
+-__setup("acpi_sleep=", acpi_sleep_setup);
+-
+-/* Ouch, we want to delete this. We already have better version in userspace, in
+- s2ram from suspend.sf.net project */
+-static __init int reset_videomode_after_s3(const struct dmi_system_id *d)
+-{
+- acpi_realmode_flags |= 2;
+- return 0;
+-}
+-
+-static __initdata struct dmi_system_id acpisleep_dmi_table[] = {
+- { /* Reset video mode after returning from ACPI S3 sleep */
+- .callback = reset_videomode_after_s3,
+- .ident = "Toshiba Satellite 4030cdt",
+- .matches = {
+- DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
+- },
+- },
+- {}
+-};
+-
+-static int __init acpisleep_dmi_init(void)
+-{
+- dmi_check_system(acpisleep_dmi_table);
+- return 0;
+-}
+-
+-core_initcall(acpisleep_dmi_init);
+-#endif /* CONFIG_ACPI_PV_SLEEP */
+--- a/arch/x86/kernel/acpi/sleep_64-xen.c
++++ /dev/null
+@@ -1,125 +0,0 @@
+-/*
+- * acpi.c - Architecture-Specific Low-Level ACPI Support
+- *
+- * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+- * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
+- * Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
+- * Copyright (C) 2002 Andi Kleen, SuSE Labs (x86-64 port)
+- * Copyright (C) 2003 Pavel Machek, SuSE Labs
+- *
+- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+- *
+- * This program is free software; you can redistribute it and/or modify
+- * it under the terms of the GNU General Public License as published by
+- * the Free Software Foundation; either version 2 of the License, or
+- * (at your option) any later version.
+- *
+- * This program is distributed in the hope that it will be useful,
+- * but WITHOUT ANY WARRANTY; without even the implied warranty of
+- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+- * GNU General Public License for more details.
+- *
+- * You should have received a copy of the GNU General Public License
+- * along with this program; if not, write to the Free Software
+- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+- *
+- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+- */
+-
+-#include <linux/kernel.h>
+-#include <linux/init.h>
+-#include <linux/types.h>
+-#include <linux/stddef.h>
+-#include <linux/slab.h>
+-#include <linux/pci.h>
+-#include <linux/bootmem.h>
+-#include <linux/acpi.h>
+-#include <linux/cpumask.h>
+-
+-#include <asm/mpspec.h>
+-#include <asm/io.h>
+-#include <asm/apic.h>
+-#include <asm/apicdef.h>
+-#include <asm/page.h>
+-#include <asm/pgtable.h>
+-#include <asm/pgalloc.h>
+-#include <asm/io_apic.h>
+-#include <asm/proto.h>
+-#include <asm/tlbflush.h>
+-
+-/* --------------------------------------------------------------------------
+- Low-Level Sleep Support
+- -------------------------------------------------------------------------- */
+-
+-#ifndef CONFIG_ACPI_PV_SLEEP
+-/* address in low memory of the wakeup routine. */
+-unsigned long acpi_wakeup_address = 0;
+-unsigned long acpi_realmode_flags;
+-extern char wakeup_start, wakeup_end;
+-
+-extern unsigned long acpi_copy_wakeup_routine(unsigned long);
+-#endif
+-
+-/**
+- * acpi_save_state_mem - save kernel state
+- *
+- * Create an identity mapped page table and copy the wakeup routine to
+- * low memory.
+- */
+-int acpi_save_state_mem(void)
+-{
+-#ifndef CONFIG_ACPI_PV_SLEEP
+- memcpy((void *)acpi_wakeup_address, &wakeup_start,
+- &wakeup_end - &wakeup_start);
+- acpi_copy_wakeup_routine(acpi_wakeup_address);
+-#endif
+- return 0;
+-}
+-
+-/*
+- * acpi_restore_state
+- */
+-void acpi_restore_state_mem(void)
+-{
+-}
+-
+-/**
+- * acpi_reserve_bootmem - do _very_ early ACPI initialisation
+- *
+- * We allocate a page in low memory for the wakeup
+- * routine for when we come back from a sleep state. The
+- * runtime allocator allows specification of <16M pages, but not
+- * <1M pages.
+- */
+-void __init acpi_reserve_bootmem(void)
+-{
+-#ifndef CONFIG_ACPI_PV_SLEEP
+- acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE*2);
+- if ((&wakeup_end - &wakeup_start) > (PAGE_SIZE*2))
+- printk(KERN_CRIT
+- "ACPI: Wakeup code way too big, will crash on attempt"
+- " to suspend\n");
+-#endif
+-}
+-
+-#ifndef CONFIG_ACPI_PV_SLEEP
+-static int __init acpi_sleep_setup(char *str)
+-{
+- while ((str != NULL) && (*str != '\0')) {
+- if (strncmp(str, "s3_bios", 7) == 0)
+- acpi_realmode_flags |= 1;
+- if (strncmp(str, "s3_mode", 7) == 0)
+- acpi_realmode_flags |= 2;
+- if (strncmp(str, "s3_beep", 7) == 0)
+- acpi_realmode_flags |= 4;
+- str = strchr(str, ',');
+- if (str != NULL)
+- str += strspn(str, ", \t");
+- }
+-
+- return 1;
+-}
+-
+-__setup("acpi_sleep=", acpi_sleep_setup);
+-#endif /* CONFIG_ACPI_PV_SLEEP */
+-
+--- /dev/null
++++ b/arch/x86/kernel/acpi/sleep-xen.c
+@@ -0,0 +1,95 @@
++/*
++ * sleep.c - x86-specific ACPI sleep support.
++ *
++ * Copyright (C) 2001-2003 Patrick Mochel
++ * Copyright (C) 2001-2003 Pavel Machek <pavel@suse.cz>
++ */
++
++#include <linux/acpi.h>
++#include <linux/bootmem.h>
++#include <linux/dmi.h>
++#include <linux/cpumask.h>
++
++#include <asm/smp.h>
++
++#ifndef CONFIG_ACPI_PV_SLEEP
++/* address in low memory of the wakeup routine. */
++unsigned long acpi_wakeup_address = 0;
++unsigned long acpi_realmode_flags;
++extern char wakeup_start, wakeup_end;
++
++extern unsigned long acpi_copy_wakeup_routine(unsigned long);
++#endif
++
++/**
++ * acpi_save_state_mem - save kernel state
++ *
++ * Create an identity mapped page table and copy the wakeup routine to
++ * low memory.
++ */
++int acpi_save_state_mem(void)
++{
++#ifndef CONFIG_ACPI_PV_SLEEP
++ if (!acpi_wakeup_address) {
++ printk(KERN_ERR "Could not allocate memory during boot, S3 disabled\n");
++ return -ENOMEM;
++ }
++ memcpy((void *)acpi_wakeup_address, &wakeup_start,
++ &wakeup_end - &wakeup_start);
++ acpi_copy_wakeup_routine(acpi_wakeup_address);
++#endif
++
++ return 0;
++}
++
++/*
++ * acpi_restore_state - undo effects of acpi_save_state_mem
++ */
++void acpi_restore_state_mem(void)
++{
++}
++
++
++/**
++ * acpi_reserve_bootmem - do _very_ early ACPI initialisation
++ *
++ * We allocate a page from the first 1MB of memory for the wakeup
++ * routine for when we come back from a sleep state. The
++ * runtime allocator allows specification of <16MB pages, but not
++ * <1MB pages.
++ */
++void __init acpi_reserve_bootmem(void)
++{
++#ifndef CONFIG_ACPI_PV_SLEEP
++ if ((&wakeup_end - &wakeup_start) > PAGE_SIZE*2) {
++ printk(KERN_ERR
++ "ACPI: Wakeup code way too big, S3 disabled.\n");
++ return;
++ }
++
++ acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE*2);
++ if (!acpi_wakeup_address)
++ printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
++#endif
++}
++
++
++#ifndef CONFIG_ACPI_PV_SLEEP
++static int __init acpi_sleep_setup(char *str)
++{
++ while ((str != NULL) && (*str != '\0')) {
++ if (strncmp(str, "s3_bios", 7) == 0)
++ acpi_realmode_flags |= 1;
++ if (strncmp(str, "s3_mode", 7) == 0)
++ acpi_realmode_flags |= 2;
++ if (strncmp(str, "s3_beep", 7) == 0)
++ acpi_realmode_flags |= 4;
++ str = strchr(str, ',');
++ if (str != NULL)
++ str += strspn(str, ", \t");
++ }
++ return 1;
++}
++
++__setup("acpi_sleep=", acpi_sleep_setup);
++#endif /* CONFIG_ACPI_PV_SLEEP */
+--- a/arch/x86/kernel/apic_32-xen.c
++++ b/arch/x86/kernel/apic_32-xen.c
+@@ -86,7 +86,7 @@ int setup_profiling_timer(unsigned int m
+ * This initializes the IO-APIC and APIC hardware if this is
+ * a UP kernel.
+ */
+-int __init APIC_init_uniprocessor (void)
++int __init APIC_init_uniprocessor(void)
+ {
+ #ifdef CONFIG_X86_IO_APIC
+ if (smp_found_config)
+--- a/arch/x86/kernel/apic_64-xen.c
++++ b/arch/x86/kernel/apic_64-xen.c
+@@ -34,34 +34,17 @@
+ #include <asm/hpet.h>
+ #include <asm/idle.h>
+
+-int apic_verbosity;
++int disable_apic;
+
+ /*
+- * 'what should we do if we get a hw irq event on an illegal vector'.
+- * each architecture has to answer this themselves.
++ * Debug level, exported for io_apic.c
+ */
+-void ack_bad_irq(unsigned int irq)
+-{
+- printk("unexpected IRQ trap at irq %02x\n", irq);
+- /*
+- * Currently unexpected vectors happen only on SMP and APIC.
+- * We _must_ ack these because every local APIC has only N
+- * irq slots per priority level, and a 'hanging, unacked' IRQ
+- * holds up an irq slot - in excessive cases (when multiple
+- * unexpected vectors occur) that might lock up the APIC
+- * completely.
+- * But don't ack when the APIC is disabled. -AK
+- */
+- if (!disable_apic)
+- ack_APIC_irq();
+-}
+-
+-int setup_profiling_timer(unsigned int multiplier)
+-{
+- return -EINVAL;
+-}
++int apic_verbosity;
+
+-void smp_local_timer_interrupt(void)
++/*
++ * The guts of the apic timer interrupt
++ */
++static void local_apic_timer_interrupt(void)
+ {
+ #ifndef CONFIG_XEN
+ int cpu = smp_processor_id();
+@@ -121,11 +104,34 @@ void smp_apic_timer_interrupt(struct pt_
+ */
+ exit_idle();
+ irq_enter();
+- smp_local_timer_interrupt();
++ local_apic_timer_interrupt();
+ irq_exit();
+ set_irq_regs(old_regs);
+ }
+
++int setup_profiling_timer(unsigned int multiplier)
++{
++ return -EINVAL;
++}
++
++/*
++ * This initializes the IO-APIC and APIC hardware if this is
++ * a UP kernel.
++ */
++int __init APIC_init_uniprocessor(void)
++{
++#ifdef CONFIG_X86_IO_APIC
++ if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
++ setup_IO_APIC();
++#endif
++
++ return 1;
++}
++
++/*
++ * Local APIC interrupts
++ */
++
+ /*
+ * This interrupt should _never_ happen with our APIC/SMP architecture
+ */
+@@ -150,7 +156,6 @@ asmlinkage void smp_spurious_interrupt(v
+ /*
+ * This interrupt should never happen with our APIC/SMP architecture
+ */
+-
+ asmlinkage void smp_error_interrupt(void)
+ {
+ unsigned int v, v1;
+@@ -178,19 +183,3 @@ asmlinkage void smp_error_interrupt(void
+ smp_processor_id(), v , v1);
+ irq_exit();
+ }
+-
+-int disable_apic;
+-
+-/*
+- * This initializes the IO-APIC and APIC hardware if this is
+- * a UP kernel.
+- */
+-int __init APIC_init_uniprocessor (void)
+-{
+-#ifdef CONFIG_X86_IO_APIC
+- if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
+- setup_IO_APIC();
+-#endif
+-
+- return 1;
+-}
+--- a/arch/x86/kernel/asm-offsets_32.c
++++ b/arch/x86/kernel/asm-offsets_32.c
+@@ -23,8 +23,10 @@
+ #include <xen/interface/xen.h>
+ #endif
+
++#ifdef CONFIG_LGUEST_GUEST
+ #include <linux/lguest.h>
+ #include "../../../drivers/lguest/lg.h"
++#endif
+
+ /* workaround for a warning with -Wmissing-prototypes */
+ void foo(void);
+--- a/arch/x86/kernel/cpu/common-xen.c
++++ b/arch/x86/kernel/cpu/common-xen.c
+@@ -27,45 +27,50 @@
+ #include "cpu.h"
+
+ DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
+- [GDT_ENTRY_KERNEL_CS] = { 0x0000ffff, 0x00cf9a00 },
+- [GDT_ENTRY_KERNEL_DS] = { 0x0000ffff, 0x00cf9200 },
+- [GDT_ENTRY_DEFAULT_USER_CS] = { 0x0000ffff, 0x00cffa00 },
+- [GDT_ENTRY_DEFAULT_USER_DS] = { 0x0000ffff, 0x00cff200 },
++ [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
++ [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
++ [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
++ [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
+ #ifndef CONFIG_XEN
+ /*
+ * Segments used for calling PnP BIOS have byte granularity.
+ * They code segments and data segments have fixed 64k limits,
+ * the transfer segment sizes are set at run time.
+ */
+- [GDT_ENTRY_PNPBIOS_CS32] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
+- [GDT_ENTRY_PNPBIOS_CS16] = { 0x0000ffff, 0x00009a00 },/* 16-bit code */
+- [GDT_ENTRY_PNPBIOS_DS] = { 0x0000ffff, 0x00009200 }, /* 16-bit data */
+- [GDT_ENTRY_PNPBIOS_TS1] = { 0x00000000, 0x00009200 },/* 16-bit data */
+- [GDT_ENTRY_PNPBIOS_TS2] = { 0x00000000, 0x00009200 },/* 16-bit data */
++ /* 32-bit code */
++ [GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
++ /* 16-bit code */
++ [GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
++ /* 16-bit data */
++ [GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
++ /* 16-bit data */
++ [GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
++ /* 16-bit data */
++ [GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
+ /*
+ * The APM segments have byte granularity and their bases
+ * are set at run time. All have 64k limits.
+ */
+- [GDT_ENTRY_APMBIOS_BASE] = { 0x0000ffff, 0x00409a00 },/* 32-bit code */
++ /* 32-bit code */
++ [GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
+ /* 16-bit code */
+- [GDT_ENTRY_APMBIOS_BASE+1] = { 0x0000ffff, 0x00009a00 },
+- [GDT_ENTRY_APMBIOS_BASE+2] = { 0x0000ffff, 0x00409200 }, /* data */
++ [GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
++ /* data */
++ [GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
+
+- [GDT_ENTRY_ESPFIX_SS] = { 0x00000000, 0x00c09200 },
++ [GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
+ #endif
+- [GDT_ENTRY_PERCPU] = { 0x00000000, 0x00000000 },
++ [GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
+ } };
+ EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
+
++__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
++
+ static int cachesize_override __cpuinitdata = -1;
+-static int disable_x86_fxsr __cpuinitdata;
+ static int disable_x86_serial_nr __cpuinitdata = 1;
+-static int disable_x86_sep __cpuinitdata;
+
+ struct cpu_dev * cpu_devs[X86_VENDOR_NUM] = {};
+
+-extern int disable_pse;
+-
+ static void __cpuinit default_init(struct cpuinfo_x86 * c)
+ {
+ /* Not much we can do here... */
+@@ -214,16 +219,8 @@ static void __cpuinit get_cpu_vendor(str
+
+ static int __init x86_fxsr_setup(char * s)
+ {
+- /* Tell all the other CPUs to not use it... */
+- disable_x86_fxsr = 1;
+-
+- /*
+- * ... and clear the bits early in the boot_cpu_data
+- * so that the bootup process doesn't try to do this
+- * either.
+- */
+- clear_bit(X86_FEATURE_FXSR, boot_cpu_data.x86_capability);
+- clear_bit(X86_FEATURE_XMM, boot_cpu_data.x86_capability);
++ setup_clear_cpu_cap(X86_FEATURE_FXSR);
++ setup_clear_cpu_cap(X86_FEATURE_XMM);
+ return 1;
+ }
+ __setup("nofxsr", x86_fxsr_setup);
+@@ -231,7 +228,7 @@ __setup("nofxsr", x86_fxsr_setup);
+
+ static int __init x86_sep_setup(char * s)
+ {
+- disable_x86_sep = 1;
++ setup_clear_cpu_cap(X86_FEATURE_SEP);
+ return 1;
+ }
+ __setup("nosep", x86_sep_setup);
+@@ -268,10 +265,10 @@ static int __cpuinit have_cpuid_p(void)
+ void __init cpu_detect(struct cpuinfo_x86 *c)
+ {
+ /* Get vendor name */
+- cpuid(0x00000000, &c->cpuid_level,
+- (int *)&c->x86_vendor_id[0],
+- (int *)&c->x86_vendor_id[8],
+- (int *)&c->x86_vendor_id[4]);
++ cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
++ (unsigned int *)&c->x86_vendor_id[0],
++ (unsigned int *)&c->x86_vendor_id[8],
++ (unsigned int *)&c->x86_vendor_id[4]);
+
+ c->x86 = 4;
+ if (c->cpuid_level >= 0x00000001) {
+@@ -284,9 +281,38 @@ void __init cpu_detect(struct cpuinfo_x8
+ if (c->x86 >= 0x6)
+ c->x86_model += ((tfms >> 16) & 0xF) << 4;
+ c->x86_mask = tfms & 15;
+- if (cap0 & (1<<19))
++ if (cap0 & (1<<19)) {
+ c->x86_cache_alignment = ((misc >> 8) & 0xff) * 8;
++ c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
++ }
++ }
++}
++static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
++{
++ u32 tfms, xlvl;
++ unsigned int ebx;
++
++ memset(&c->x86_capability, 0, sizeof c->x86_capability);
++ if (have_cpuid_p()) {
++ /* Intel-defined flags: level 0x00000001 */
++ if (c->cpuid_level >= 0x00000001) {
++ u32 capability, excap;
++ cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
++ c->x86_capability[0] = capability;
++ c->x86_capability[4] = excap;
++ }
++
++ /* AMD-defined flags: level 0x80000001 */
++ xlvl = cpuid_eax(0x80000000);
++ if ((xlvl & 0xffff0000) == 0x80000000) {
++ if (xlvl >= 0x80000001) {
++ c->x86_capability[1] = cpuid_edx(0x80000001);
++ c->x86_capability[6] = cpuid_ecx(0x80000001);
++ }
++ }
++
+ }
++
+ }
+
+ /* Do minimum CPU detection early.
+@@ -300,6 +326,7 @@ static void __init early_cpu_detect(void
+ struct cpuinfo_x86 *c = &boot_cpu_data;
+
+ c->x86_cache_alignment = 32;
++ c->x86_clflush_size = 32;
+
+ if (!have_cpuid_p())
+ return;
+@@ -307,19 +334,30 @@ static void __init early_cpu_detect(void
+ cpu_detect(c);
+
+ get_cpu_vendor(c, 1);
++
++ switch (c->x86_vendor) {
++ case X86_VENDOR_AMD:
++ early_init_amd(c);
++ break;
++ case X86_VENDOR_INTEL:
++ early_init_intel(c);
++ break;
++ }
++
++ early_get_cap(c);
+ }
+
+ static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
+ {
+ u32 tfms, xlvl;
+- int ebx;
++ unsigned int ebx;
+
+ if (have_cpuid_p()) {
+ /* Get vendor name */
+- cpuid(0x00000000, &c->cpuid_level,
+- (int *)&c->x86_vendor_id[0],
+- (int *)&c->x86_vendor_id[8],
+- (int *)&c->x86_vendor_id[4]);
++ cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
++ (unsigned int *)&c->x86_vendor_id[0],
++ (unsigned int *)&c->x86_vendor_id[8],
++ (unsigned int *)&c->x86_vendor_id[4]);
+
+ get_cpu_vendor(c, 0);
+ /* Initialize the standard set of capabilities */
+@@ -364,8 +402,6 @@ static void __cpuinit generic_identify(s
+ init_scattered_cpuid_features(c);
+ }
+
+- early_intel_workaround(c);
+-
+ #ifdef CONFIG_X86_HT
+ c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
+ #endif
+@@ -399,7 +435,7 @@ __setup("serialnumber", x86_serial_nr_se
+ /*
+ * This does the hard work of actually picking apart the CPU stuff...
+ */
+-static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
++void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+ {
+ int i;
+
+@@ -425,20 +461,9 @@ static void __cpuinit identify_cpu(struc
+
+ generic_identify(c);
+
+- printk(KERN_DEBUG "CPU: After generic identify, caps:");
+- for (i = 0; i < NCAPINTS; i++)
+- printk(" %08lx", c->x86_capability[i]);
+- printk("\n");
+-
+- if (this_cpu->c_identify) {
++ if (this_cpu->c_identify)
+ this_cpu->c_identify(c);
+
+- printk(KERN_DEBUG "CPU: After vendor identify, caps:");
+- for (i = 0; i < NCAPINTS; i++)
+- printk(" %08lx", c->x86_capability[i]);
+- printk("\n");
+- }
+-
+ /*
+ * Vendor-specific initialization. In this section we
+ * canonicalize the feature flags, meaning if there are
+@@ -460,23 +485,6 @@ static void __cpuinit identify_cpu(struc
+ * we do "generic changes."
+ */
+
+- /* TSC disabled? */
+- if ( tsc_disable )
+- clear_bit(X86_FEATURE_TSC, c->x86_capability);
+-
+- /* FXSR disabled? */
+- if (disable_x86_fxsr) {
+- clear_bit(X86_FEATURE_FXSR, c->x86_capability);
+- clear_bit(X86_FEATURE_XMM, c->x86_capability);
+- }
+-
+- /* SEP disabled? */
+- if (disable_x86_sep)
+- clear_bit(X86_FEATURE_SEP, c->x86_capability);
+-
+- if (disable_pse)
+- clear_bit(X86_FEATURE_PSE, c->x86_capability);
+-
+ /* If the model name is still unset, do table lookup. */
+ if ( !c->x86_model_id[0] ) {
+ char *p;
+@@ -489,13 +497,6 @@ static void __cpuinit identify_cpu(struc
+ c->x86, c->x86_model);
+ }
+
+- /* Now the feature flags better reflect actual CPU features! */
+-
+- printk(KERN_DEBUG "CPU: After all inits, caps:");
+- for (i = 0; i < NCAPINTS; i++)
+- printk(" %08lx", c->x86_capability[i]);
+- printk("\n");
+-
+ /*
+ * On SMP, boot_cpu_data holds the common feature set between
+ * all CPUs; so make sure that we indicate which features are
+@@ -508,8 +509,14 @@ static void __cpuinit identify_cpu(struc
+ boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
+ }
+
++ /* Clear all flags overriden by options */
++ for (i = 0; i < NCAPINTS; i++)
++ c->x86_capability[i] &= ~cleared_cpu_caps[i];
++
+ /* Init Machine Check Exception if available. */
+ mcheck_init(c);
++
++ select_idle_routine(c);
+ }
+
+ void __init identify_boot_cpu(void)
+@@ -517,7 +524,6 @@ void __init identify_boot_cpu(void)
+ identify_cpu(&boot_cpu_data);
+ sysenter_setup();
+ enable_sep_cpu();
+- mtrr_bp_init();
+ }
+
+ void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
+@@ -574,6 +580,13 @@ void __cpuinit detect_ht(struct cpuinfo_
+ }
+ #endif
+
++static __init int setup_noclflush(char *arg)
++{
++ setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
++ return 1;
++}
++__setup("noclflush", setup_noclflush);
++
+ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
+ {
+ char *vendor = NULL;
+@@ -597,6 +610,17 @@ void __cpuinit print_cpu_info(struct cpu
+ printk("\n");
+ }
+
++static __init int setup_disablecpuid(char *arg)
++{
++ int bit;
++ if (get_option(&arg, &bit) && bit < NCAPINTS*32)
++ setup_clear_cpu_cap(bit);
++ else
++ return 0;
++ return 1;
++}
++__setup("clearcpuid=", setup_disablecpuid);
++
+ cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
+
+ /* This is hacky. :)
+@@ -606,16 +630,6 @@ cpumask_t cpu_initialized __cpuinitdata
+ * They will insert themselves into the cpu_devs structure.
+ * Then, when cpu_init() is called, we can just iterate over that array.
+ */
+-
+-extern int intel_cpu_init(void);
+-extern int cyrix_init_cpu(void);
+-extern int nsc_init_cpu(void);
+-extern int amd_init_cpu(void);
+-extern int centaur_init_cpu(void);
+-extern int transmeta_init_cpu(void);
+-extern int nexgen_init_cpu(void);
+-extern int umc_init_cpu(void);
+-
+ void __init early_cpu_init(void)
+ {
+ intel_cpu_init();
+@@ -627,21 +641,13 @@ void __init early_cpu_init(void)
+ nexgen_init_cpu();
+ umc_init_cpu();
+ early_cpu_detect();
+-
+-#ifdef CONFIG_DEBUG_PAGEALLOC
+- /* pse is not compatible with on-the-fly unmapping,
+- * disable it even if the cpus claim to support it.
+- */
+- clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
+- disable_pse = 1;
+-#endif
+ }
+
+ /* Make sure %fs is initialized properly in idle threads */
+-struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
++struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
+ {
+ memset(regs, 0, sizeof(struct pt_regs));
+- regs->xfs = __KERNEL_PERCPU;
++ regs->fs = __KERNEL_PERCPU;
+ return regs;
+ }
+
+@@ -649,7 +655,7 @@ struct pt_regs * __devinit idle_regs(str
+ * it's on the real one. */
+ void switch_to_new_gdt(void)
+ {
+- struct Xgt_desc_struct gdt_descr;
++ struct desc_ptr gdt_descr;
+ unsigned long va, frames[16];
+ int f;
+
+@@ -692,12 +698,6 @@ void __cpuinit cpu_init(void)
+
+ if (cpu_has_vme || cpu_has_de)
+ clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
+- if (tsc_disable && cpu_has_tsc) {
+- printk(KERN_NOTICE "Disabling TSC...\n");
+- /**** FIX-HPA: DOES THIS REALLY BELONG HERE? ****/
+- clear_bit(X86_FEATURE_TSC, boot_cpu_data.x86_capability);
+- set_in_cr4(X86_CR4_TSD);
+- }
+
+ switch_to_new_gdt();
+
+@@ -710,7 +710,7 @@ void __cpuinit cpu_init(void)
+ BUG();
+ enter_lazy_tlb(&init_mm, curr);
+
+- load_esp0(t, thread);
++ load_sp0(t, thread);
+
+ load_LDT(&init_mm.context);
+
+--- a/arch/x86/kernel/cpu/mtrr/main-xen.c
++++ b/arch/x86/kernel/cpu/mtrr/main-xen.c
+@@ -33,7 +33,7 @@ struct mtrr_ops generic_mtrr_ops = {
+
+ struct mtrr_ops *mtrr_if = &generic_mtrr_ops;
+ unsigned int num_var_ranges;
+-unsigned int *usage_table;
++unsigned int mtrr_usage_table[MAX_VAR_RANGES];
+
+ static void __init set_num_var_ranges(void)
+ {
+@@ -52,17 +52,12 @@ static void __init init_table(void)
+ int i, max;
+
+ max = num_var_ranges;
+- if ((usage_table = kmalloc(max * sizeof *usage_table, GFP_KERNEL))
+- == NULL) {
+- printk(KERN_ERR "mtrr: could not allocate\n");
+- return;
+- }
+ for (i = 0; i < max; i++)
+- usage_table[i] = 0;
++ mtrr_usage_table[i] = 0;
+ }
+
+ int mtrr_add_page(unsigned long base, unsigned long size,
+- unsigned int type, char increment)
++ unsigned int type, bool increment)
+ {
+ int error;
+ struct xen_platform_op op;
+@@ -81,7 +76,7 @@ int mtrr_add_page(unsigned long base, un
+ }
+
+ if (increment)
+- ++usage_table[op.u.add_memtype.reg];
++ ++mtrr_usage_table[op.u.add_memtype.reg];
+
+ mutex_unlock(&mtrr_mutex);
+
+@@ -103,7 +98,7 @@ static int mtrr_check(unsigned long base
+
+ int
+ mtrr_add(unsigned long base, unsigned long size, unsigned int type,
+- char increment)
++ bool increment)
+ {
+ if (mtrr_check(base, size))
+ return -EINVAL;
+@@ -136,11 +131,11 @@ int mtrr_del_page(int reg, unsigned long
+ goto out;
+ }
+ }
+- if (usage_table[reg] < 1) {
++ if (mtrr_usage_table[reg] < 1) {
+ printk(KERN_WARNING "mtrr: reg: %d has count=0\n", reg);
+ goto out;
+ }
+- if (--usage_table[reg] < 1) {
++ if (--mtrr_usage_table[reg] < 1) {
+ op.cmd = XENPF_del_memtype;
+ op.u.del_memtype.handle = 0;
+ op.u.del_memtype.reg = reg;
+--- a/arch/x86/kernel/e820_32-xen.c
++++ b/arch/x86/kernel/e820_32-xen.c
+@@ -7,7 +7,6 @@
+ #include <linux/kexec.h>
+ #include <linux/module.h>
+ #include <linux/mm.h>
+-#include <linux/efi.h>
+ #include <linux/pfn.h>
+ #include <linux/uaccess.h>
+ #include <linux/suspend.h>
+@@ -18,11 +17,6 @@
+ #include <asm/setup.h>
+ #include <xen/interface/memory.h>
+
+-#ifdef CONFIG_EFI
+-int efi_enabled = 0;
+-EXPORT_SYMBOL(efi_enabled);
+-#endif
+-
+ struct e820map e820;
+ struct change_member {
+ struct e820entry *pbios; /* pointer to original bios entry */
+@@ -38,26 +32,6 @@ unsigned long pci_mem_start = 0x10000000
+ EXPORT_SYMBOL(pci_mem_start);
+ #endif
+ extern int user_defined_memmap;
+-struct resource data_resource = {
+- .name = "Kernel data",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-struct resource code_resource = {
+- .name = "Kernel code",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-struct resource bss_resource = {
+- .name = "Kernel bss",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+
+ static struct resource system_rom_resource = {
+ .name = "System ROM",
+@@ -112,60 +86,6 @@ static struct resource video_rom_resourc
+ .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+ };
+
+-static struct resource video_ram_resource = {
+- .name = "Video RAM area",
+- .start = 0xa0000,
+- .end = 0xbffff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-static struct resource standard_io_resources[] = { {
+- .name = "dma1",
+- .start = 0x0000,
+- .end = 0x001f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "pic1",
+- .start = 0x0020,
+- .end = 0x0021,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "timer0",
+- .start = 0x0040,
+- .end = 0x0043,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "timer1",
+- .start = 0x0050,
+- .end = 0x0053,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "keyboard",
+- .start = 0x0060,
+- .end = 0x006f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "dma page reg",
+- .start = 0x0080,
+- .end = 0x008f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "pic2",
+- .start = 0x00a0,
+- .end = 0x00a1,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "dma2",
+- .start = 0x00c0,
+- .end = 0x00df,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "fpu",
+- .start = 0x00f0,
+- .end = 0x00ff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-} };
+-
+ #define ROMSIGNATURE 0xaa55
+
+ static int __init romsignature(const unsigned char *rom)
+@@ -272,10 +192,9 @@ static struct e820map machine_e820;
+ * Request address space for all standard RAM and ROM resources
+ * and also for regions reported as reserved by the e820.
+ */
+-static void __init
+-legacy_init_iomem_resources(struct resource *code_resource,
+- struct resource *data_resource,
+- struct resource *bss_resource)
++void __init init_iomem_resources(struct resource *code_resource,
++ struct resource *data_resource,
++ struct resource *bss_resource)
+ {
+ int i;
+
+@@ -324,39 +243,6 @@ legacy_init_iomem_resources(struct resou
+
+ #undef e820
+
+-/*
+- * Request address space for all standard resources
+- *
+- * This is called just before pcibios_init(), which is also a
+- * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
+- */
+-static int __init request_standard_resources(void)
+-{
+- int i;
+-
+- /* Nothing to do if not running in dom0. */
+- if (!is_initial_xendomain())
+- return 0;
+-
+- printk("Setting up standard PCI resources\n");
+- if (efi_enabled)
+- efi_initialize_iomem_resources(&code_resource,
+- &data_resource, &bss_resource);
+- else
+- legacy_init_iomem_resources(&code_resource,
+- &data_resource, &bss_resource);
+-
+- /* EFI systems may still have VGA */
+- request_resource(&iomem_resource, &video_ram_resource);
+-
+- /* request I/O space for devices used on all i[345]86 PCs */
+- for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+- request_resource(&ioport_resource, &standard_io_resources[i]);
+- return 0;
+-}
+-
+-subsys_initcall(request_standard_resources);
+-
+ #if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
+ /**
+ * e820_mark_nosave_regions - Find the ranges of physical addresses that do not
+@@ -393,19 +279,17 @@ void __init add_memory_region(unsigned l
+ {
+ int x;
+
+- if (!efi_enabled) {
+- x = e820.nr_map;
+-
+- if (x == E820MAX) {
+- printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
+- return;
+- }
++ x = e820.nr_map;
+
+- e820.map[x].addr = start;
+- e820.map[x].size = size;
+- e820.map[x].type = type;
+- e820.nr_map++;
++ if (x == E820MAX) {
++ printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
++ return;
+ }
++
++ e820.map[x].addr = start;
++ e820.map[x].size = size;
++ e820.map[x].type = type;
++ e820.nr_map++;
+ } /* add_memory_region */
+
+ /*
+@@ -642,29 +526,6 @@ int __init copy_e820_map(struct e820entr
+ }
+
+ /*
+- * Callback for efi_memory_walk.
+- */
+-static int __init
+-efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
+-{
+- unsigned long *max_pfn = arg, pfn;
+-
+- if (start < end) {
+- pfn = PFN_UP(end -1);
+- if (pfn > *max_pfn)
+- *max_pfn = pfn;
+- }
+- return 0;
+-}
+-
+-static int __init
+-efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
+-{
+- memory_present(0, PFN_UP(start), PFN_DOWN(end));
+- return 0;
+-}
+-
+-/*
+ * Find the highest page frame number we have available
+ */
+ void __init find_max_pfn(void)
+@@ -672,11 +533,6 @@ void __init find_max_pfn(void)
+ int i;
+
+ max_pfn = 0;
+- if (efi_enabled) {
+- efi_memmap_walk(efi_find_max_pfn, &max_pfn);
+- efi_memmap_walk(efi_memory_present_wrapper, NULL);
+- return;
+- }
+
+ for (i = 0; i < e820.nr_map; i++) {
+ unsigned long start, end;
+@@ -694,34 +550,12 @@ void __init find_max_pfn(void)
+ }
+
+ /*
+- * Free all available memory for boot time allocation. Used
+- * as a callback function by efi_memory_walk()
+- */
+-
+-static int __init
+-free_available_memory(unsigned long start, unsigned long end, void *arg)
+-{
+- /* check max_low_pfn */
+- if (start >= (max_low_pfn << PAGE_SHIFT))
+- return 0;
+- if (end >= (max_low_pfn << PAGE_SHIFT))
+- end = max_low_pfn << PAGE_SHIFT;
+- if (start < end)
+- free_bootmem(start, end - start);
+-
+- return 0;
+-}
+-/*
+ * Register fully available low RAM pages with the bootmem allocator.
+ */
+ void __init register_bootmem_low_pages(unsigned long max_low_pfn)
+ {
+ int i;
+
+- if (efi_enabled) {
+- efi_memmap_walk(free_available_memory, NULL);
+- return;
+- }
+ for (i = 0; i < e820.nr_map; i++) {
+ unsigned long curr_pfn, last_pfn, size;
+ /*
+@@ -855,56 +689,12 @@ void __init print_memory_map(char *who)
+ }
+ }
+
+-static __init __always_inline void efi_limit_regions(unsigned long long size)
+-{
+- unsigned long long current_addr = 0;
+- efi_memory_desc_t *md, *next_md;
+- void *p, *p1;
+- int i, j;
+-
+- j = 0;
+- p1 = memmap.map;
+- for (p = p1, i = 0; p < memmap.map_end; p += memmap.desc_size, i++) {
+- md = p;
+- next_md = p1;
+- current_addr = md->phys_addr +
+- PFN_PHYS(md->num_pages);
+- if (is_available_memory(md)) {
+- if (md->phys_addr >= size) continue;
+- memcpy(next_md, md, memmap.desc_size);
+- if (current_addr >= size) {
+- next_md->num_pages -=
+- PFN_UP(current_addr-size);
+- }
+- p1 += memmap.desc_size;
+- next_md = p1;
+- j++;
+- } else if ((md->attribute & EFI_MEMORY_RUNTIME) ==
+- EFI_MEMORY_RUNTIME) {
+- /* In order to make runtime services
+- * available we have to include runtime
+- * memory regions in memory map */
+- memcpy(next_md, md, memmap.desc_size);
+- p1 += memmap.desc_size;
+- next_md = p1;
+- j++;
+- }
+- }
+- memmap.nr_map = j;
+- memmap.map_end = memmap.map +
+- (memmap.nr_map * memmap.desc_size);
+-}
+-
+ void __init limit_regions(unsigned long long size)
+ {
+ unsigned long long current_addr = 0;
+ int i;
+
+ print_memory_map("limit_regions start");
+- if (efi_enabled) {
+- efi_limit_regions(size);
+- return;
+- }
+ for (i = 0; i < e820.nr_map; i++) {
+ current_addr = e820.map[i].addr + e820.map[i].size;
+ if (current_addr < size)
+@@ -1056,3 +846,44 @@ static int __init parse_memmap(char *arg
+ return 0;
+ }
+ early_param("memmap", parse_memmap);
++
++#ifndef CONFIG_XEN
++void __init update_memory_range(u64 start, u64 size, unsigned old_type,
++ unsigned new_type)
++{
++ int i;
++
++ BUG_ON(old_type == new_type);
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ u64 final_start, final_end;
++ if (ei->type != old_type)
++ continue;
++ /* totally covered? */
++ if (ei->addr >= start && ei->size <= size) {
++ ei->type = new_type;
++ continue;
++ }
++ /* partially covered */
++ final_start = max(start, ei->addr);
++ final_end = min(start + size, ei->addr + ei->size);
++ if (final_start >= final_end)
++ continue;
++ add_memory_region(final_start, final_end - final_start,
++ new_type);
++ }
++}
++
++void __init update_e820(void)
++{
++ u8 nr_map;
++
++ nr_map = e820.nr_map;
++ if (sanitize_e820_map(e820.map, &nr_map))
++ return;
++ e820.nr_map = nr_map;
++ printk(KERN_INFO "modified physical RAM map:\n");
++ print_memory_map("modified");
++}
++#endif
+--- a/arch/x86/kernel/e820_64-xen.c
++++ b/arch/x86/kernel/e820_64-xen.c
+@@ -1,4 +1,4 @@
+-/*
++/*
+ * Handle the memory map.
+ * The functions here do the job until bootmem takes over.
+ *
+@@ -26,6 +26,7 @@
+ #include <asm/proto.h>
+ #include <asm/setup.h>
+ #include <asm/sections.h>
++#include <asm/kdebug.h>
+ #include <xen/interface/memory.h>
+
+ struct e820map e820 __initdata;
+@@ -33,96 +34,103 @@ struct e820map e820 __initdata;
+ struct e820map machine_e820;
+ #endif
+
+-/*
++/*
+ * PFN of last memory page.
+ */
+-unsigned long end_pfn;
+-EXPORT_SYMBOL(end_pfn);
++unsigned long end_pfn;
+
+-/*
++/*
+ * end_pfn only includes RAM, while end_pfn_map includes all e820 entries.
+ * The direct mapping extends to end_pfn_map, so that we can directly access
+ * apertures, ACPI and other tables without having to play with fixmaps.
+- */
+-unsigned long end_pfn_map;
++ */
++unsigned long end_pfn_map;
+
+-/*
++/*
+ * Last pfn which the user wants to use.
+ */
+ static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
+
+-extern struct resource code_resource, data_resource, bss_resource;
+-
+-/* Check for some hardcoded bad areas that early boot is not allowed to touch */
+-static inline int bad_addr(unsigned long *addrp, unsigned long size)
+-{
+- unsigned long addr = *addrp, last = addr + size;
++/*
++ * Early reserved memory areas.
++ */
++#define MAX_EARLY_RES 20
+
++struct early_res {
++ unsigned long start, end;
++ char name[16];
++};
++static struct early_res early_res[MAX_EARLY_RES] __initdata = {
+ #ifndef CONFIG_XEN
+- /* various gunk below that needed for SMP startup */
+- if (addr < 0x8000) {
+- *addrp = PAGE_ALIGN(0x8000);
+- return 1;
+- }
+-
+- /* direct mapping tables of the kernel */
+- if (last >= table_start<<PAGE_SHIFT && addr < table_end<<PAGE_SHIFT) {
+- *addrp = PAGE_ALIGN(table_end << PAGE_SHIFT);
+- return 1;
+- }
+-
+- /* initrd */
+-#ifdef CONFIG_BLK_DEV_INITRD
+- if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
+- unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
+- unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
+- unsigned long ramdisk_end = ramdisk_image+ramdisk_size;
+-
+- if (last >= ramdisk_image && addr < ramdisk_end) {
+- *addrp = PAGE_ALIGN(ramdisk_end);
+- return 1;
+- }
+- }
++ { 0, PAGE_SIZE, "BIOS data page" }, /* BIOS data page */
++#ifdef CONFIG_SMP
++ { SMP_TRAMPOLINE_BASE, SMP_TRAMPOLINE_BASE + 2*PAGE_SIZE, "SMP_TRAMPOLINE" },
+ #endif
+- /* kernel code */
+- if (last >= __pa_symbol(&_text) && addr < __pa_symbol(&_end)) {
+- *addrp = PAGE_ALIGN(__pa_symbol(&_end));
+- return 1;
+- }
++#endif
++ {}
++};
+
+- if (last >= ebda_addr && addr < ebda_addr + ebda_size) {
+- *addrp = PAGE_ALIGN(ebda_addr + ebda_size);
+- return 1;
++void __init reserve_early(unsigned long start, unsigned long end, char *name)
++{
++ int i;
++ struct early_res *r;
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
++ r = &early_res[i];
++ if (end > r->start && start < r->end)
++ panic("Overlapping early reservations %lx-%lx %s to %lx-%lx %s\n",
++ start, end - 1, name?name:"", r->start, r->end - 1, r->name);
+ }
++ if (i >= MAX_EARLY_RES)
++ panic("Too many early reservations");
++ r = &early_res[i];
++ r->start = start;
++ r->end = end;
++ if (name)
++ strncpy(r->name, name, sizeof(r->name) - 1);
++}
+
+-#ifdef CONFIG_NUMA
+- /* NUMA memory to node map */
+- if (last >= nodemap_addr && addr < nodemap_addr + nodemap_size) {
+- *addrp = nodemap_addr + nodemap_size;
+- return 1;
++void __init early_res_to_bootmem(void)
++{
++ int i;
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
++ struct early_res *r = &early_res[i];
++ printk(KERN_INFO "early res: %d [%lx-%lx] %s\n", i,
++ r->start, r->end - 1, r->name);
++ reserve_bootmem_generic(r->start, r->end - r->start);
+ }
+-#endif
+- /* XXX ramdisk image here? */
+-#else
+- if (last < (table_end<<PAGE_SHIFT)) {
+- *addrp = table_end << PAGE_SHIFT;
+- return 1;
++}
++
++/* Check for already reserved areas */
++static inline int bad_addr(unsigned long *addrp, unsigned long size)
++{
++ int i;
++ unsigned long addr = *addrp, last;
++ int changed = 0;
++again:
++ last = addr + size;
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
++ struct early_res *r = &early_res[i];
++ if (last >= r->start && addr < r->end) {
++ *addrp = addr = r->end;
++ changed = 1;
++ goto again;
++ }
+ }
+-#endif
+- return 0;
+-}
++ return changed;
++}
+
+ /*
+ * This function checks if any part of the range <start,end> is mapped
+ * with type.
+ */
+-int e820_any_mapped(unsigned long start, unsigned long end, unsigned type)
+-{
++int
++e820_any_mapped(unsigned long start, unsigned long end, unsigned type)
++{
+ int i;
+
+ #ifndef CONFIG_XEN
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
+ #else
+ if (!is_initial_xendomain())
+ return 0;
+@@ -130,12 +138,12 @@ int e820_any_mapped(unsigned long start,
+ const struct e820entry *ei = &machine_e820.map[i];
+ #endif
+
+- if (type && ei->type != type)
++ if (type && ei->type != type)
+ continue;
+ if (ei->addr >= end || ei->addr + ei->size <= start)
+- continue;
+- return 1;
+- }
++ continue;
++ return 1;
++ }
+ return 0;
+ }
+ EXPORT_SYMBOL_GPL(e820_any_mapped);
+@@ -146,7 +154,8 @@ EXPORT_SYMBOL_GPL(e820_any_mapped);
+ * Note: this function only works correct if the e820 table is sorted and
+ * not-overlapping, which is the case
+ */
+-int __init e820_all_mapped(unsigned long start, unsigned long end, unsigned type)
++int __init e820_all_mapped(unsigned long start, unsigned long end,
++ unsigned type)
+ {
+ int i;
+
+@@ -171,65 +180,77 @@ int __init e820_all_mapped(unsigned long
+ */
+ if (ei->addr <= start)
+ start = ei->addr + ei->size;
+- /* if start is now at or beyond end, we're done, full coverage */
++ /*
++ * if start is now at or beyond end, we're done, full
++ * coverage
++ */
+ if (start >= end)
+- return 1; /* we're done */
++ return 1;
+ }
+ return 0;
+ }
+
+-/*
+- * Find a free area in a specific range.
+- */
+-unsigned long __init find_e820_area(unsigned long start, unsigned long end, unsigned size)
+-{
+- int i;
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- unsigned long addr = ei->addr, last;
+- if (ei->type != E820_RAM)
+- continue;
+- if (addr < start)
++/*
++ * Find a free area with specified alignment in a specific range.
++ */
++unsigned long __init find_e820_area(unsigned long start, unsigned long end,
++ unsigned size, unsigned long align)
++{
++ int i;
++ unsigned long mask = ~(align - 1);
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ unsigned long addr = ei->addr, last;
++
++ if (ei->type != E820_RAM)
++ continue;
++ if (addr < start)
+ addr = start;
+- if (addr > ei->addr + ei->size)
+- continue;
++ if (addr > ei->addr + ei->size)
++ continue;
+ while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size)
+ ;
+- last = PAGE_ALIGN(addr) + size;
++ addr = (addr + align - 1) & mask;
++ last = addr + size;
+ if (last > ei->addr + ei->size)
+ continue;
+- if (last > end)
++ if (last > end)
+ continue;
+- return addr;
+- }
+- return -1UL;
+-}
++ return addr;
++ }
++ return -1UL;
++}
+
+ /*
+ * Find the highest page frame number we have available
+ */
+ unsigned long __init e820_end_of_ram(void)
+ {
+- unsigned long end_pfn = 0;
++ unsigned long end_pfn;
++
+ end_pfn = find_max_pfn_with_active_regions();
+-
+- if (end_pfn > end_pfn_map)
++
++ if (end_pfn > end_pfn_map)
+ end_pfn_map = end_pfn;
+ if (end_pfn_map > MAXMEM>>PAGE_SHIFT)
+ end_pfn_map = MAXMEM>>PAGE_SHIFT;
+ if (end_pfn > end_user_pfn)
+ end_pfn = end_user_pfn;
+- if (end_pfn > end_pfn_map)
+- end_pfn = end_pfn_map;
++ if (end_pfn > end_pfn_map)
++ end_pfn = end_pfn_map;
+
+- printk("end_pfn_map = %lu\n", end_pfn_map);
+- return end_pfn;
++ printk(KERN_INFO "end_pfn_map = %lu\n", end_pfn_map);
++ return end_pfn;
+ }
+
+ /*
+ * Mark e820 reserved areas as busy for the resource manager.
+ */
+-void __init e820_reserve_resources(struct e820entry *e820, int nr_map)
++void __init e820_reserve_resources(struct e820entry *e820, int nr_map,
++ struct resource *code_resource,
++ struct resource *data_resource,
++ struct resource *bss_resource)
+ {
+ int i;
+ for (i = 0; i < nr_map; i++) {
+@@ -247,14 +268,14 @@ void __init e820_reserve_resources(struc
+ request_resource(&iomem_resource, res);
+ if (e820[i].type == E820_RAM) {
+ /*
+- * We don't know which RAM region contains kernel data,
+- * so we try it repeatedly and let the resource manager
+- * test it.
++ * We don't know which RAM region contains kernel data,
++ * so we try it repeatedly and let the resource manager
++ * test it.
+ */
+ #ifndef CONFIG_XEN
+- request_resource(res, &code_resource);
+- request_resource(res, &data_resource);
+- request_resource(res, &bss_resource);
++ request_resource(res, code_resource);
++ request_resource(res, data_resource);
++ request_resource(res, bss_resource);
+ #endif
+ #ifdef CONFIG_KEXEC
+ if (crashk_res.start != crashk_res.end)
+@@ -357,9 +378,9 @@ e820_register_active_regions(int nid, un
+ add_active_range(nid, ei_startpfn, ei_endpfn);
+ }
+
+-/*
++/*
+ * Add a memory region to the kernel e820 map.
+- */
++ */
+ void __init add_memory_region(unsigned long start, unsigned long size, int type)
+ {
+ int x = e820.nr_map;
+@@ -384,9 +405,7 @@ unsigned long __init e820_hole_size(unsi
+ {
+ unsigned long start_pfn = start >> PAGE_SHIFT;
+ unsigned long end_pfn = end >> PAGE_SHIFT;
+- unsigned long ei_startpfn;
+- unsigned long ei_endpfn;
+- unsigned long ram = 0;
++ unsigned long ei_startpfn, ei_endpfn, ram = 0;
+ int i;
+
+ for (i = 0; i < e820.nr_map; i++) {
+@@ -398,28 +417,31 @@ unsigned long __init e820_hole_size(unsi
+ return end - start - (ram << PAGE_SHIFT);
+ }
+
+-void __init e820_print_map(char *who)
++static void __init e820_print_map(char *who)
+ {
+ int i;
+
+ for (i = 0; i < e820.nr_map; i++) {
+ printk(KERN_INFO " %s: %016Lx - %016Lx ", who,
+- (unsigned long long) e820.map[i].addr,
+- (unsigned long long) (e820.map[i].addr + e820.map[i].size));
++ (unsigned long long) e820.map[i].addr,
++ (unsigned long long)
++ (e820.map[i].addr + e820.map[i].size));
+ switch (e820.map[i].type) {
+- case E820_RAM: printk("(usable)\n");
+- break;
++ case E820_RAM:
++ printk(KERN_CONT "(usable)\n");
++ break;
+ case E820_RESERVED:
+- printk("(reserved)\n");
+- break;
++ printk(KERN_CONT "(reserved)\n");
++ break;
+ case E820_ACPI:
+- printk("(ACPI data)\n");
+- break;
++ printk(KERN_CONT "(ACPI data)\n");
++ break;
+ case E820_NVS:
+- printk("(ACPI NVS)\n");
+- break;
+- default: printk("type %u\n", e820.map[i].type);
+- break;
++ printk(KERN_CONT "(ACPI NVS)\n");
++ break;
++ default:
++ printk(KERN_CONT "type %u\n", e820.map[i].type);
++ break;
+ }
+ }
+ }
+@@ -427,11 +449,11 @@ void __init e820_print_map(char *who)
+ /*
+ * Sanitize the BIOS e820 map.
+ *
+- * Some e820 responses include overlapping entries. The following
++ * Some e820 responses include overlapping entries. The following
+ * replaces the original e820 map with a new one, removing overlaps.
+ *
+ */
+-static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
++static int __init sanitize_e820_map(struct e820entry *biosmap, char *pnr_map)
+ {
+ struct change_member {
+ struct e820entry *pbios; /* pointer to original bios entry */
+@@ -451,7 +473,8 @@ static int __init sanitize_e820_map(stru
+ int i;
+
+ /*
+- Visually we're performing the following (1,2,3,4 = memory types)...
++ Visually we're performing the following
++ (1,2,3,4 = memory types)...
+
+ Sample memory map (w/overlaps):
+ ____22__________________
+@@ -493,22 +516,23 @@ static int __init sanitize_e820_map(stru
+ old_nr = *pnr_map;
+
+ /* bail out if we find any unreasonable addresses in bios map */
+- for (i=0; i<old_nr; i++)
++ for (i = 0; i < old_nr; i++)
+ if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
+ return -1;
+
+ /* create pointers for initial change-point information (for sorting) */
+- for (i=0; i < 2*old_nr; i++)
++ for (i = 0; i < 2 * old_nr; i++)
+ change_point[i] = &change_point_list[i];
+
+ /* record all known change-points (starting and ending addresses),
+ omitting those that are for empty memory regions */
+ chgidx = 0;
+- for (i=0; i < old_nr; i++) {
++ for (i = 0; i < old_nr; i++) {
+ if (biosmap[i].size != 0) {
+ change_point[chgidx]->addr = biosmap[i].addr;
+ change_point[chgidx++]->pbios = &biosmap[i];
+- change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
++ change_point[chgidx]->addr = biosmap[i].addr +
++ biosmap[i].size;
+ change_point[chgidx++]->pbios = &biosmap[i];
+ }
+ }
+@@ -518,75 +542,106 @@ static int __init sanitize_e820_map(stru
+ still_changing = 1;
+ while (still_changing) {
+ still_changing = 0;
+- for (i=1; i < chg_nr; i++) {
+- /* if <current_addr> > <last_addr>, swap */
+- /* or, if current=<start_addr> & last=<end_addr>, swap */
+- if ((change_point[i]->addr < change_point[i-1]->addr) ||
+- ((change_point[i]->addr == change_point[i-1]->addr) &&
+- (change_point[i]->addr == change_point[i]->pbios->addr) &&
+- (change_point[i-1]->addr != change_point[i-1]->pbios->addr))
+- )
+- {
++ for (i = 1; i < chg_nr; i++) {
++ unsigned long long curaddr, lastaddr;
++ unsigned long long curpbaddr, lastpbaddr;
++
++ curaddr = change_point[i]->addr;
++ lastaddr = change_point[i - 1]->addr;
++ curpbaddr = change_point[i]->pbios->addr;
++ lastpbaddr = change_point[i - 1]->pbios->addr;
++
++ /*
++ * swap entries, when:
++ *
++ * curaddr > lastaddr or
++ * curaddr == lastaddr and curaddr == curpbaddr and
++ * lastaddr != lastpbaddr
++ */
++ if (curaddr < lastaddr ||
++ (curaddr == lastaddr && curaddr == curpbaddr &&
++ lastaddr != lastpbaddr)) {
+ change_tmp = change_point[i];
+ change_point[i] = change_point[i-1];
+ change_point[i-1] = change_tmp;
+- still_changing=1;
++ still_changing = 1;
+ }
+ }
+ }
+
+ /* create a new bios memory map, removing overlaps */
+- overlap_entries=0; /* number of entries in the overlap table */
+- new_bios_entry=0; /* index for creating new bios map entries */
++ overlap_entries = 0; /* number of entries in the overlap table */
++ new_bios_entry = 0; /* index for creating new bios map entries */
+ last_type = 0; /* start with undefined memory type */
+ last_addr = 0; /* start with 0 as last starting address */
++
+ /* loop through change-points, determining affect on the new bios map */
+- for (chgidx=0; chgidx < chg_nr; chgidx++)
+- {
++ for (chgidx = 0; chgidx < chg_nr; chgidx++) {
+ /* keep track of all overlapping bios entries */
+- if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
+- {
+- /* add map entry to overlap list (> 1 entry implies an overlap) */
+- overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
+- }
+- else
+- {
+- /* remove entry from list (order independent, so swap with last) */
+- for (i=0; i<overlap_entries; i++)
+- {
+- if (overlap_list[i] == change_point[chgidx]->pbios)
+- overlap_list[i] = overlap_list[overlap_entries-1];
++ if (change_point[chgidx]->addr ==
++ change_point[chgidx]->pbios->addr) {
++ /*
++ * add map entry to overlap list (> 1 entry
++ * implies an overlap)
++ */
++ overlap_list[overlap_entries++] =
++ change_point[chgidx]->pbios;
++ } else {
++ /*
++ * remove entry from list (order independent,
++ * so swap with last)
++ */
++ for (i = 0; i < overlap_entries; i++) {
++ if (overlap_list[i] ==
++ change_point[chgidx]->pbios)
++ overlap_list[i] =
++ overlap_list[overlap_entries-1];
+ }
+ overlap_entries--;
+ }
+- /* if there are overlapping entries, decide which "type" to use */
+- /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
++ /*
++ * if there are overlapping entries, decide which
++ * "type" to use (larger value takes precedence --
++ * 1=usable, 2,3,4,4+=unusable)
++ */
+ current_type = 0;
+- for (i=0; i<overlap_entries; i++)
++ for (i = 0; i < overlap_entries; i++)
+ if (overlap_list[i]->type > current_type)
+ current_type = overlap_list[i]->type;
+- /* continue building up new bios map based on this information */
++ /*
++ * continue building up new bios map based on this
++ * information
++ */
+ if (current_type != last_type) {
+ if (last_type != 0) {
+ new_bios[new_bios_entry].size =
+ change_point[chgidx]->addr - last_addr;
+- /* move forward only if the new size was non-zero */
++ /*
++ * move forward only if the new size
++ * was non-zero
++ */
+ if (new_bios[new_bios_entry].size != 0)
++ /*
++ * no more space left for new
++ * bios entries ?
++ */
+ if (++new_bios_entry >= E820MAX)
+- break; /* no more space left for new bios entries */
++ break;
+ }
+ if (current_type != 0) {
+- new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
++ new_bios[new_bios_entry].addr =
++ change_point[chgidx]->addr;
+ new_bios[new_bios_entry].type = current_type;
+- last_addr=change_point[chgidx]->addr;
++ last_addr = change_point[chgidx]->addr;
+ }
+ last_type = current_type;
+ }
+ }
+- new_nr = new_bios_entry; /* retain count for new bios entries */
++ /* retain count for new bios entries */
++ new_nr = new_bios_entry;
+
+ /* copy new bios mapping into original location */
+- memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
++ memcpy(biosmap, new_bios, new_nr * sizeof(struct e820entry));
+ *pnr_map = new_nr;
+
+ return 0;
+@@ -601,7 +656,7 @@ static int __init sanitize_e820_map(stru
+ * will have given us a memory map that we can use to properly
+ * set up memory. If we aren't, we'll fake a memory map.
+ */
+-static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
++static int __init copy_e820_map(struct e820entry *biosmap, int nr_map)
+ {
+ #ifndef CONFIG_XEN
+ /* Only one memory region (or negative)? Ignore it */
+@@ -622,7 +677,7 @@ static int __init copy_e820_map(struct e
+ return -1;
+
+ add_memory_region(start, size, type);
+- } while (biosmap++,--nr_map);
++ } while (biosmap++, --nr_map);
+
+ #ifdef CONFIG_XEN
+ if (is_initial_xendomain()) {
+@@ -641,15 +696,17 @@ static int __init copy_e820_map(struct e
+ return 0;
+ }
+
+-void early_panic(char *msg)
++static void early_panic(char *msg)
+ {
+ early_printk(msg);
+ panic(msg);
+ }
+
+-#ifndef CONFIG_XEN
+-void __init setup_memory_region(void)
++/* We're not void only for x86 32-bit compat */
++char * __init machine_specific_memory_setup(void)
+ {
++#ifndef CONFIG_XEN
++ char *who = "BIOS-e820";
+ /*
+ * Try to copy the BIOS-supplied E820-map.
+ *
+@@ -659,14 +716,8 @@ void __init setup_memory_region(void)
+ sanitize_e820_map(boot_params.e820_map, &boot_params.e820_entries);
+ if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries) < 0)
+ early_panic("Cannot find a valid memory map");
+- printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+- e820_print_map("BIOS-e820");
+-}
+-
+ #else /* CONFIG_XEN */
+-
+-void __init setup_memory_region(void)
+-{
++ char *who = "Xen";
+ int rc;
+ struct xen_memory_map memmap;
+ /*
+@@ -694,11 +745,13 @@ void __init setup_memory_region(void)
+
+ if (copy_e820_map(map, (char)memmap.nr_entries) < 0)
+ early_panic("Cannot find a valid memory map");
+-
++#endif
+ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+- e820_print_map("Xen");
++ e820_print_map(who);
++
++ /* In case someone cares... */
++ return who;
+ }
+-#endif
+
+ static int __init parse_memopt(char *p)
+ {
+@@ -709,7 +762,7 @@ static int __init parse_memopt(char *p)
+ if (!p)
+ return -EINVAL;
+ end_user_pfn = memparse(p, &p);
+- end_user_pfn >>= PAGE_SHIFT;
++ end_user_pfn >>= PAGE_SHIFT;
+
+ end = end_user_pfn<<PAGE_SHIFT;
+ i = e820.nr_map-1;
+@@ -727,7 +780,7 @@ static int __init parse_memopt(char *p)
+ }
+
+ return 0;
+-}
++}
+ early_param("mem", parse_memopt);
+
+ static int userdef __initdata;
+@@ -739,9 +792,9 @@ static int __init parse_memmap_opt(char
+
+ if (!strcmp(p, "exactmap")) {
+ #ifdef CONFIG_CRASH_DUMP
+- /* If we are doing a crash dump, we
+- * still need to know the real mem
+- * size before original memory map is
++ /*
++ * If we are doing a crash dump, we still need to know
++ * the real mem size before original memory map is
+ * reset.
+ */
+ e820_register_active_regions(0, 0, -1UL);
+@@ -758,6 +811,8 @@ static int __init parse_memmap_opt(char
+ mem_size = memparse(p, &p);
+ if (p == oldp)
+ return -EINVAL;
++
++ userdef = 1;
+ if (*p == '@') {
+ start_at = memparse(p+1, &p);
+ add_memory_region(start_at, mem_size, E820_RAM);
+@@ -777,11 +832,58 @@ early_param("memmap", parse_memmap_opt);
+ void __init finish_e820_parsing(void)
+ {
+ if (userdef) {
++ char nr = e820.nr_map;
++
++ if (sanitize_e820_map(e820.map, &nr) < 0)
++ early_panic("Invalid user supplied memory map");
++ e820.nr_map = nr;
++
+ printk(KERN_INFO "user-defined physical RAM map:\n");
+ e820_print_map("user");
+ }
+ }
+
++#ifndef CONFIG_XEN
++void __init update_memory_range(u64 start, u64 size, unsigned old_type,
++ unsigned new_type)
++{
++ int i;
++
++ BUG_ON(old_type == new_type);
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ u64 final_start, final_end;
++ if (ei->type != old_type)
++ continue;
++ /* totally covered? */
++ if (ei->addr >= start && ei->size <= size) {
++ ei->type = new_type;
++ continue;
++ }
++ /* partially covered */
++ final_start = max(start, ei->addr);
++ final_end = min(start + size, ei->addr + ei->size);
++ if (final_start >= final_end)
++ continue;
++ add_memory_region(final_start, final_end - final_start,
++ new_type);
++ }
++}
++
++void __init update_e820(void)
++{
++ u8 nr_map;
++
++ nr_map = e820.nr_map;
++ if (sanitize_e820_map(e820.map, &nr_map))
++ return;
++ e820.nr_map = nr_map;
++ printk(KERN_INFO "modified physical RAM map:\n");
++ e820_print_map("modified");
++}
++#endif
++
+ unsigned long pci_mem_start = 0xaeedbabe;
+ EXPORT_SYMBOL(pci_mem_start);
+
+@@ -825,8 +927,10 @@ __init void e820_setup_gap(struct e820en
+
+ if (!found) {
+ gapstart = (end_pfn << PAGE_SHIFT) + 1024*1024;
+- printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit address range\n"
+- KERN_ERR "PCI: Unassigned devices with 32bit resource registers may break!\n");
++ printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit "
++ "address range\n"
++ KERN_ERR "PCI: Unassigned devices with 32bit resource "
++ "registers may break!\n");
+ }
+
+ /*
+@@ -839,8 +943,9 @@ __init void e820_setup_gap(struct e820en
+ /* Fun with two's complement */
+ pci_mem_start = (gapstart + round) & -round;
+
+- printk(KERN_INFO "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
+- pci_mem_start, gapstart, gapsize);
++ printk(KERN_INFO
++ "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
++ pci_mem_start, gapstart, gapsize);
+ }
+
+ int __init arch_get_ram_range(int slot, u64 *addr, u64 *size)
+--- a/arch/x86/kernel/early_printk-xen.c
++++ b/arch/x86/kernel/early_printk-xen.c
+@@ -222,7 +222,7 @@ static struct console simnow_console = {
+ };
+
+ /* Direct interface for emergencies */
+-struct console *early_console = &early_vga_console;
++static struct console *early_console = &early_vga_console;
+ static int early_console_initialized = 0;
+
+ void early_printk(const char *fmt, ...)
+--- a/arch/x86/kernel/entry_32-xen.S
++++ b/arch/x86/kernel/entry_32-xen.S
+@@ -59,7 +59,7 @@
+ * for paravirtualization. The following will never clobber any registers:
+ * INTERRUPT_RETURN (aka. "iret")
+ * GET_CR0_INTO_EAX (aka. "movl %cr0, %eax")
+- * ENABLE_INTERRUPTS_SYSEXIT (aka "sti; sysexit").
++ * ENABLE_INTERRUPTS_SYSCALL_RET (aka "sti; sysexit").
+ *
+ * For DISABLE_INTERRUPTS/ENABLE_INTERRUPTS (aka "cli"/"sti"), you must
+ * specify what registers can be overwritten (CLBR_NONE, CLBR_EAX/EDX/ECX/ANY).
+@@ -282,16 +282,21 @@ END(resume_kernel)
+ #endif
+ CFI_ENDPROC
+
++ .macro test_tif ti_reg # system call tracing in operation / emulation
++ /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
++ testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(\ti_reg)
++ .endm
++
+ /* SYSENTER_RETURN points to after the "sysenter" instruction in
+ the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */
+
+ # sysenter call handler stub
+-ENTRY(sysenter_entry)
++ENTRY(ia32_sysenter_target)
+ CFI_STARTPROC simple
+ CFI_SIGNAL_FRAME
+ CFI_DEF_CFA esp, 0
+ CFI_REGISTER esp, ebp
+- movl SYSENTER_stack_esp0(%esp),%esp
++ movl SYSENTER_stack_sp0(%esp),%esp
+ sysenter_past_esp:
+ /*
+ * No need to follow this irqs on/off section: the syscall
+@@ -334,9 +339,7 @@ sysenter_past_esp:
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+-
+- /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
+- testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
++ test_tif %ebp
+ jnz syscall_trace_entry
+ cmpl $(nr_syscalls), %eax
+ jae syscall_badsys
+@@ -354,7 +357,7 @@ sysenter_past_esp:
+ xorl %ebp,%ebp
+ TRACE_IRQS_ON
+ 1: mov PT_FS(%esp), %fs
+- ENABLE_INTERRUPTS_SYSEXIT
++ ENABLE_INTERRUPTS_SYSCALL_RET
+ CFI_ENDPROC
+ .pushsection .fixup,"ax"
+ 2: movl $0,PT_FS(%esp)
+@@ -363,10 +366,10 @@ sysenter_past_esp:
+ .align 4
+ .long 1b,2b
+ .popsection
+-ENDPROC(sysenter_entry)
++ENDPROC(ia32_sysenter_target)
+
+ # pv sysenter call handler stub
+-ENTRY(sysenter_entry_pv)
++ENTRY(ia32pv_sysenter_target)
+ RING0_INT_FRAME
+ movl $__USER_DS,16(%esp)
+ movl %ebp,12(%esp)
+@@ -389,7 +392,7 @@ ENTRY(sysenter_entry_pv)
+ .previous
+ /* fall through */
+ CFI_ENDPROC
+-ENDPROC(sysenter_entry_pv)
++ENDPROC(ia32pv_sysenter_target)
+
+ # system call handler stub
+ ENTRY(system_call)
+@@ -398,9 +401,7 @@ ENTRY(system_call)
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+- # system call tracing in operation / emulation
+- /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
+- testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
++ test_tif %ebp
+ jnz syscall_trace_entry
+ cmpl $(nr_syscalls), %eax
+ jae syscall_badsys
+@@ -452,7 +453,8 @@ restore_nocheck_notrace:
+ RESTORE_REGS
+ addl $4, %esp # skip orig_eax/error_code
+ CFI_ADJUST_CFA_OFFSET -4
+-1: INTERRUPT_RETURN
++irq_return:
++ INTERRUPT_RETURN
+ .section .fixup,"ax"
+ iret_exc:
+ pushl $0 # no error code
+@@ -461,7 +463,7 @@ iret_exc:
+ .previous
+ .section __ex_table,"a"
+ .align 4
+- .long 1b,iret_exc
++ .long irq_return,iret_exc
+ .previous
+
+ CFI_RESTORE_STATE
+@@ -657,7 +659,7 @@ END(syscall_badsys)
+ * Build the entry stubs and pointer table with
+ * some assembler magic.
+ */
+-.data
++.section .rodata,"a"
+ ENTRY(interrupt)
+ .text
+
+@@ -959,7 +961,7 @@ END(device_not_available)
+ * that sets up the real kernel stack. Check here, since we can't
+ * allow the wrong stack to be used.
+ *
+- * "SYSENTER_stack_esp0+12" is because the NMI/debug handler will have
++ * "SYSENTER_stack_sp0+12" is because the NMI/debug handler will have
+ * already pushed 3 words if it hits on the sysenter instruction:
+ * eflags, cs and eip.
+ *
+@@ -971,7 +973,7 @@ END(device_not_available)
+ cmpw $__KERNEL_CS,4(%esp); \
+ jne ok; \
+ label: \
+- movl SYSENTER_stack_esp0+offset(%esp),%esp; \
++ movl SYSENTER_stack_sp0+offset(%esp),%esp; \
+ CFI_DEF_CFA esp, 0; \
+ CFI_UNDEFINED eip; \
+ pushfl; \
+@@ -986,7 +988,7 @@ label: \
+ KPROBE_ENTRY(debug)
+ RING0_INT_FRAME
+ #ifndef CONFIG_XEN
+- cmpl $sysenter_entry,(%esp)
++ cmpl $ia32_sysenter_target,(%esp)
+ jne debug_stack_correct
+ FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn)
+ debug_stack_correct:
+@@ -1019,7 +1021,7 @@ KPROBE_ENTRY(nmi)
+ popl %eax
+ CFI_ADJUST_CFA_OFFSET -4
+ je nmi_espfix_stack
+- cmpl $sysenter_entry,(%esp)
++ cmpl $ia32_sysenter_target,(%esp)
+ je nmi_stack_fixup
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+@@ -1032,7 +1034,7 @@ KPROBE_ENTRY(nmi)
+ popl %eax
+ CFI_ADJUST_CFA_OFFSET -4
+ jae nmi_stack_correct
+- cmpl $sysenter_entry,12(%esp)
++ cmpl $ia32_sysenter_target,12(%esp)
+ je nmi_debug_stack_check
+ nmi_stack_correct:
+ /* We have a RING0_INT_FRAME here */
+@@ -1085,12 +1087,8 @@ nmi_espfix_stack:
+ RESTORE_REGS
+ lss 12+4(%esp), %esp # back to espfix stack
+ CFI_ADJUST_CFA_OFFSET -24
+-1: INTERRUPT_RETURN
++ jmp irq_return
+ CFI_ENDPROC
+-.section __ex_table,"a"
+- .align 4
+- .long 1b,iret_exc
+-.previous
+ #else
+ KPROBE_ENTRY(nmi)
+ RING0_INT_FRAME
+@@ -1108,17 +1106,17 @@ KPROBE_END(nmi)
+
+ #ifdef CONFIG_PARAVIRT
+ ENTRY(native_iret)
+-1: iret
++ iret
+ .section __ex_table,"a"
+ .align 4
+- .long 1b,iret_exc
++ .long native_iret, iret_exc
+ .previous
+ END(native_iret)
+
+-ENTRY(native_irq_enable_sysexit)
++ENTRY(native_irq_enable_syscall_ret)
+ sti
+ sysexit
+-END(native_irq_enable_sysexit)
++END(native_irq_enable_syscall_ret)
+ #endif
+
+ KPROBE_ENTRY(int3)
+@@ -1267,7 +1265,144 @@ ENTRY(kernel_thread_helper)
+ CFI_ENDPROC
+ ENDPROC(kernel_thread_helper)
+
++#include <asm/alternative-asm.h>
++
++ # pv syscall call handler stub
++ENTRY(ia32pv_cstar_target)
++ RING0_INT_FRAME
++ movl $__USER_DS,16(%esp)
++ movl %ebp,%ecx
++ movl $__USER_CS,4(%esp)
++ movl 12(%esp),%ebp
++ pushl %eax # save orig_eax
++ CFI_ADJUST_CFA_OFFSET 4
++/*
++ * Load the potential sixth argument from user stack.
++ * Careful about security.
++ */
++ cmpl $__PAGE_OFFSET-4,%ebp
++ CFI_REMEMBER_STATE
++ ja cstar_fault
++1: movl (%ebp),%ebp
++.section __ex_table,"a"
++ .align 4
++ .long 1b,cstar_fault
++.previous
++ SAVE_ALL
++ GET_THREAD_INFO(%ebp)
++ test_tif %ebp
++ jnz cstar_trace_entry
++ cmpl $nr_syscalls,%eax
++ jae cstar_badsys
++.Lcstar_call:
++ btl %eax,cstar_special
++ jc .Lcstar_special
++ call *cstar_call_table(,%eax,4)
++ movl %eax,PT_EAX(%esp) # store the return value
++.Lcstar_exit:
++ movl PT_ECX(%esp),%ecx
++ movl %ecx,PT_EBP(%esp) # put user EBP back in place
++ jmp syscall_exit
++.Lcstar_special:
++ movl PT_ECX(%esp),%ecx
++ movl %ecx,PT_EBP(%esp) # put user EBP back in place
++ jmp syscall_call
++cstar_set_tif:
++ movl $cstar_clear_tif,(%esp) # replace return address
++ LOCK_PREFIX
++ orl $_TIF_CSTAR,TI_flags(%ebp)
++ jmp *sys_call_table(,%eax,4)
++cstar_clear_tif:
++ movl %eax,PT_EAX(%esp) # store the return value
++ LOCK_PREFIX
++ andl $~_TIF_CSTAR,TI_flags(%ebp)
++ jmp .Lcstar_exit
++cstar_trace_entry:
++ movl $-ENOSYS,PT_EAX(%esp)
++ cmpl $nr_syscalls,%eax
++ jae 1f
++ btl %eax,cstar_special
++ jc .Lcstar_trace_special
++1: movl %esp,%eax
++ xorl %edx,%edx
++ LOCK_PREFIX
++ orl $_TIF_CSTAR,TI_flags(%ebp)
++ call do_syscall_trace
++ LOCK_PREFIX
++ andl $~_TIF_CSTAR,TI_flags(%ebp)
++ testl %eax,%eax
++ jne .Lcstar_resume # ret != 0 -> running under PTRACE_SYSEMU,
++ # so must skip actual syscall
++ movl PT_ORIG_EAX(%esp),%eax
++ cmpl $nr_syscalls,%eax
++ jb .Lcstar_call
++ jmp .Lcstar_exit
++.Lcstar_trace_special:
++ movl PT_ECX(%esp),%ecx
++ movl %esp,%eax
++ xorl %edx,%edx
++ movl %ecx,PT_EBP(%esp) # put user EBP back in place
++ call do_syscall_trace
++ testl %eax,%eax
++ jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU,
++ # so must skip actual syscall
++ movl PT_ORIG_EAX(%esp),%eax
++ cmpl $nr_syscalls,%eax
++ jb syscall_call
++ jmp syscall_exit
++cstar_badsys:
++ movl $-ENOSYS,PT_EAX(%esp)
++.Lcstar_resume:
++ movl PT_ECX(%esp),%ecx
++ movl %ecx,PT_EBP(%esp) # put user EBP back in place
++ jmp resume_userspace
++ CFI_RESTORE_STATE
++cstar_fault:
++ movl $-EFAULT,%eax
++ SAVE_ALL
++ GET_THREAD_INFO(%ebp)
++ jmp .Lcstar_resume
++ CFI_ENDPROC
++ENDPROC(ia32pv_cstar_target)
++
++ENTRY(cstar_ret_from_fork)
++ CFI_STARTPROC
++ movl PT_ECX(%esp),%ecx
++ GET_THREAD_INFO(%ebp)
++ movl %ecx,PT_EBP(%esp) # put user EBP back in place
++ LOCK_PREFIX
++ andl $~_TIF_CSTAR,TI_flags(%ebp)
++ jmp ret_from_fork
++ CFI_ENDPROC
++END(ret_from_fork)
++
+ .section .rodata,"a"
+ #include "syscall_table_32.S"
+
+ syscall_table_size=(.-sys_call_table)
++
++#include <asm/unistd.h>
++cstar_special:
++nr=0
++mask=0
++.rept nr_syscalls+31
++ .irp n, __NR_sigreturn, __NR_rt_sigreturn
++ .if nr == \n
++ mask = mask | (1 << (\n & 31))
++ .endif
++ .endr
++ nr = nr + 1
++ .if (nr & 31) == 0
++ .long mask
++ mask = 0
++ .endif
++.endr
++#define sys_call_table cstar_call_table
++#define sys_fork cstar_set_tif
++#define sys_clone cstar_set_tif
++#define sys_vfork cstar_set_tif
++#include "syscall_table_32.S"
++#undef sys_call_table
++#undef sys_fork
++#undef sys_clone
++#undef sys_vfork
+--- a/arch/x86/kernel/entry_64-xen.S
++++ b/arch/x86/kernel/entry_64-xen.S
+@@ -54,17 +54,22 @@
+ #include <asm/page.h>
+ #include <asm/irqflags.h>
+ #include <asm/errno.h>
+-#include <xen/interface/arch-x86_64.h>
++#include <xen/interface/xen.h>
+ #include <xen/interface/features.h>
+
+-#include "xen_entry_64.S"
+-
+ .code64
+
+ #ifndef CONFIG_PREEMPT
+ #define retint_kernel retint_restore_args
+ #endif
+
++#ifdef CONFIG_PARAVIRT
++ENTRY(native_irq_enable_syscall_ret)
++ movq %gs:pda_oldrsp,%rsp
++ swapgs
++ sysretq
++#endif /* CONFIG_PARAVIRT */
++
+
+ .macro TRACE_IRQS_IRETQ offset=ARGOFFSET
+ #ifdef CONFIG_TRACE_IRQFLAGS
+@@ -277,7 +282,7 @@ ret_from_sys_call:
+ sysret_check:
+ LOCKDEP_SYS_EXIT
+ GET_THREAD_INFO(%rcx)
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ movl threadinfo_flags(%rcx),%edx
+ andl %edi,%edx
+@@ -287,7 +292,7 @@ sysret_check:
+ * sysretq will re-enable interrupts:
+ */
+ TRACE_IRQS_ON
+- XEN_UNBLOCK_EVENTS(%rsi)
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ RESTORE_ARGS 0,8,0
+ HYPERVISOR_IRET VGCF_IN_SYSCALL
+
+@@ -298,7 +303,7 @@ sysret_careful:
+ bt $TIF_NEED_RESCHED,%edx
+ jnc sysret_signal
+ TRACE_IRQS_ON
+- XEN_UNBLOCK_EVENTS(%rsi)
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ pushq %rdi
+ CFI_ADJUST_CFA_OFFSET 8
+ call schedule
+@@ -309,9 +314,8 @@ sysret_careful:
+ /* Handle a signal */
+ sysret_signal:
+ TRACE_IRQS_ON
+-/* sti */
+- XEN_UNBLOCK_EVENTS(%rsi)
+- testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
++ ENABLE_INTERRUPTS(CLBR_NONE)
++ testl $_TIF_DO_NOTIFY_MASK,%edx
+ jz 1f
+
+ /* Really a signal */
+@@ -323,7 +327,7 @@ sysret_signal:
+ 1: movl $_TIF_NEED_RESCHED,%edi
+ /* Use IRET because user could have changed frame. This
+ works because ptregscall_common has called FIXUP_TOP_OF_STACK. */
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ jmp int_with_check
+
+@@ -355,7 +359,7 @@ tracesys:
+ */
+ .globl int_ret_from_sys_call
+ int_ret_from_sys_call:
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ testb $3,CS-ARGOFFSET(%rsp)
+ jnz 1f
+@@ -381,22 +385,20 @@ int_careful:
+ bt $TIF_NEED_RESCHED,%edx
+ jnc int_very_careful
+ TRACE_IRQS_ON
+-/* sti */
+- XEN_UNBLOCK_EVENTS(%rsi)
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ pushq %rdi
+ CFI_ADJUST_CFA_OFFSET 8
+ call schedule
+ popq %rdi
+ CFI_ADJUST_CFA_OFFSET -8
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ jmp int_with_check
+
+ /* handle signals and tracing -- both require a full stack frame */
+ int_very_careful:
+ TRACE_IRQS_ON
+-/* sti */
+- XEN_UNBLOCK_EVENTS(%rsi)
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ SAVE_REST
+ /* Check for syscall exit trace */
+ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edx
+@@ -411,7 +413,7 @@ int_very_careful:
+ jmp int_restore_rest
+
+ int_signal:
+- testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
++ testl $_TIF_DO_NOTIFY_MASK,%edx
+ jz 1f
+ movq %rsp,%rdi # &ptregs -> arg1
+ xorl %esi,%esi # oldset -> arg2
+@@ -419,7 +421,7 @@ int_signal:
+ 1: movl $_TIF_NEED_RESCHED,%edi
+ int_restore_rest:
+ RESTORE_REST
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ jmp int_with_check
+ CFI_ENDPROC
+@@ -474,6 +476,7 @@ ENTRY(stub_execve)
+ CFI_REGISTER rip, r11
+ SAVE_REST
+ FIXUP_TOP_OF_STACK %r11
++ movq %rsp, %rcx
+ call sys_execve
+ RESTORE_TOP_OF_STACK %r11
+ movq %rax,RAX(%rsp)
+@@ -526,11 +529,10 @@ retint_check:
+ retint_restore_args: /* return to kernel space */
+ movl EFLAGS-REST_SKIP(%rsp), %eax
+ shr $9, %eax # EAX[0] == IRET_EFLAGS.IF
+- XEN_GET_VCPU_INFO(%rsi)
++ GET_VCPU_INFO
+ andb evtchn_upcall_mask(%rsi),%al
+ andb $1,%al # EAX[0] == IRET_EFLAGS.IF & event_mask
+ jnz restore_all_enable_events # != 0 => enable event delivery
+- XEN_PUT_VCPU_INFO(%rsi)
+
+ RESTORE_ARGS 0,8,0
+ HYPERVISOR_IRET 0
+@@ -541,31 +543,29 @@ retint_careful:
+ bt $TIF_NEED_RESCHED,%edx
+ jnc retint_signal
+ TRACE_IRQS_ON
+- XEN_UNBLOCK_EVENTS(%rsi)
+-/* sti */
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ pushq %rdi
+ CFI_ADJUST_CFA_OFFSET 8
+ call schedule
+ popq %rdi
+ CFI_ADJUST_CFA_OFFSET -8
+ GET_THREAD_INFO(%rcx)
+- XEN_BLOCK_EVENTS(%rsi)
+-/* cli */
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ jmp retint_check
+
+ retint_signal:
+- testl $(_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY),%edx
++ testl $_TIF_DO_NOTIFY_MASK,%edx
+ jz retint_restore_args
+ TRACE_IRQS_ON
+- XEN_UNBLOCK_EVENTS(%rsi)
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ SAVE_REST
+ movq $-1,ORIG_RAX(%rsp)
+ xorl %esi,%esi # oldset
+ movq %rsp,%rdi # &pt_regs
+ call do_notify_resume
+ RESTORE_REST
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ movl $_TIF_NEED_RESCHED,%edi
+ GET_THREAD_INFO(%rcx)
+@@ -702,7 +702,7 @@ END(spurious_interrupt)
+ rdmsr
+ testl %edx,%edx
+ js 1f
+- swapgs
++ SWAPGS
+ xorl %ebx,%ebx
+ 1:
+ #endif
+@@ -719,8 +719,7 @@ END(spurious_interrupt)
+ .if \ist
+ addq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
+ .endif
+-/* cli */
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ .if \irqtrace
+ TRACE_IRQS_OFF
+ .endif
+@@ -749,10 +748,10 @@ paranoid_swapgs\trace:
+ .if \trace
+ TRACE_IRQS_IRETQ 0
+ .endif
+- swapgs
++ SWAPGS_UNSAFE_STACK
+ paranoid_restore\trace:
+ RESTORE_ALL 8
+- iretq
++ jmp irq_return
+ paranoid_userspace\trace:
+ GET_THREAD_INFO(%rcx)
+ movl threadinfo_flags(%rcx),%ebx
+@@ -767,11 +766,11 @@ paranoid_userspace\trace:
+ .if \trace
+ TRACE_IRQS_ON
+ .endif
+- sti
++ ENABLE_INTERRUPTS(CLBR_NONE)
+ xorl %esi,%esi /* arg2: oldset */
+ movq %rsp,%rdi /* arg1: &pt_regs */
+ call do_notify_resume
+- cli
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ .if \trace
+ TRACE_IRQS_OFF
+ .endif
+@@ -780,9 +779,9 @@ paranoid_schedule\trace:
+ .if \trace
+ TRACE_IRQS_ON
+ .endif
+- sti
++ ENABLE_INTERRUPTS(CLBR_ANY)
+ call schedule
+- cli
++ DISABLE_INTERRUPTS(CLBR_ANY)
+ .if \trace
+ TRACE_IRQS_OFF
+ .endif
+@@ -846,8 +845,7 @@ error_call_handler:
+ call *%rax
+ error_exit:
+ RESTORE_REST
+-/* cli */
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ GET_THREAD_INFO(%rcx)
+ testb $3,CS-ARGOFFSET(%rsp)
+@@ -875,7 +873,7 @@ error_kernelspace:
+ iret run with kernel gs again, so don't set the user space flag.
+ B stepping K8s sometimes report an truncated RIP for IRET
+ exceptions returning to compat mode. Check for these here too. */
+- leaq iret_label(%rip),%rbp
++ leaq irq_return(%rip),%rbp
+ cmpq %rbp,RIP(%rsp)
+ je error_swapgs
+ movl %ebp,%ebp /* zero extend */
+@@ -930,19 +928,17 @@ END(do_hypervisor_callback)
+ restore_all_enable_events:
+ CFI_DEFAULT_STACK adj=1
+ TRACE_IRQS_ON
+- XEN_UNBLOCK_EVENTS(%rsi) # %rsi is already set up...
++ __ENABLE_INTERRUPTS
+
+ scrit: /**** START OF CRITICAL REGION ****/
+- XEN_TEST_PENDING(%rsi)
++ __TEST_PENDING
+ CFI_REMEMBER_STATE
+ jnz 14f # process more events if necessary...
+- XEN_PUT_VCPU_INFO(%rsi)
+ RESTORE_ARGS 0,8,0
+ HYPERVISOR_IRET 0
+
+ CFI_RESTORE_STATE
+-14: XEN_LOCKED_BLOCK_EVENTS(%rsi)
+- XEN_PUT_VCPU_INFO(%rsi)
++14: __DISABLE_INTERRUPTS
+ SAVE_REST
+ movq %rsp,%rdi # set the argument again
+ jmp 11b
+@@ -1086,15 +1082,16 @@ ENDPROC(child_rip)
+ * rdi: name, rsi: argv, rdx: envp
+ *
+ * We want to fallback into:
+- * extern long sys_execve(char *name, char **argv,char **envp, struct pt_regs regs)
++ * extern long sys_execve(char *name, char **argv,char **envp, struct pt_regs *regs)
+ *
+ * do_sys_execve asm fallback arguments:
+- * rdi: name, rsi: argv, rdx: envp, fake frame on the stack
++ * rdi: name, rsi: argv, rdx: envp, rcx: fake frame on the stack
+ */
+ ENTRY(kernel_execve)
+ CFI_STARTPROC
+ FAKE_STACK_FRAME $0
+ SAVE_ALL
++ movq %rsp,%rcx
+ call sys_execve
+ movq %rax, RAX(%rsp)
+ RESTORE_REST
+@@ -1144,7 +1141,7 @@ do_nmi_callback:
+ call do_nmi
+ orl $NMI_MASK,EFLAGS(%rsp)
+ RESTORE_REST
+- XEN_BLOCK_EVENTS(%rsi)
++ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ GET_THREAD_INFO(%rcx)
+ jmp retint_restore_args
+--- a/arch/x86/kernel/fixup.c
++++ b/arch/x86/kernel/fixup.c
+@@ -36,7 +36,7 @@
+
+ #define DP(_f, _args...) printk(KERN_ALERT " " _f "\n" , ## _args )
+
+-fastcall void do_fixup_4gb_segment(struct pt_regs *regs, long error_code)
++void do_fixup_4gb_segment(struct pt_regs *regs, long error_code)
+ {
+ static unsigned long printed = 0;
+ char info[100];
+--- a/arch/x86/kernel/genapic_64-xen.c
++++ b/arch/x86/kernel/genapic_64-xen.c
+@@ -24,20 +24,13 @@
+ #include <acpi/acpi_bus.h>
+ #endif
+
+-/*
+- * which logical CPU number maps to which CPU (physical APIC ID)
+- *
+- * The following static array is used during kernel startup
+- * and the x86_cpu_to_apicid_ptr contains the address of the
+- * array during this time. Is it zeroed when the per_cpu
+- * data area is removed.
+- */
++/* which logical CPU number maps to which CPU (physical APIC ID) */
+ #ifndef CONFIG_XEN
+-u8 x86_cpu_to_apicid_init[NR_CPUS] __initdata
++u16 x86_cpu_to_apicid_init[NR_CPUS] __initdata
+ = { [0 ... NR_CPUS-1] = BAD_APICID };
+-void *x86_cpu_to_apicid_ptr;
++void *x86_cpu_to_apicid_early_ptr;
+ #endif
+-DEFINE_PER_CPU(u8, x86_cpu_to_apicid) = BAD_APICID;
++DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID;
+ EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
+
+ #ifndef CONFIG_XEN
+--- a/arch/x86/kernel/head_32-xen.S
++++ b/arch/x86/kernel/head_32-xen.S
+@@ -3,6 +3,7 @@
+ .text
+ #include <linux/elfnote.h>
+ #include <linux/threads.h>
++#include <linux/init.h>
+ #include <linux/linkage.h>
+ #include <asm/segment.h>
+ #include <asm/page.h>
+@@ -88,7 +89,7 @@ ENTRY(_stext)
+ */
+ .section ".bss.page_aligned","wa"
+ .align PAGE_SIZE_asm
+-ENTRY(swapper_pg_pmd)
++ENTRY(swapper_pg_fixmap)
+ .fill 1024,4,0
+ ENTRY(empty_zero_page)
+ .fill 4096,1,0
+--- a/arch/x86/kernel/head64-xen.c
++++ b/arch/x86/kernel/head64-xen.c
+@@ -16,6 +16,7 @@
+ #include <linux/kernel.h>
+ #include <linux/string.h>
+ #include <linux/percpu.h>
++#include <linux/start_kernel.h>
+ #include <linux/module.h>
+
+ #include <asm/processor.h>
+@@ -26,6 +27,8 @@
+ #include <asm/pgtable.h>
+ #include <asm/tlbflush.h>
+ #include <asm/sections.h>
++#include <asm/kdebug.h>
++#include <asm/e820.h>
+
+ unsigned long start_pfn;
+
+@@ -34,7 +37,7 @@ static void __init zap_identity_mappings
+ {
+ pgd_t *pgd = pgd_offset_k(0UL);
+ pgd_clear(pgd);
+- __flush_tlb();
++ __flush_tlb_all();
+ }
+
+ /* Don't add a printk in there. printk relies on the PDA which is not initialized
+@@ -72,6 +75,37 @@ EXPORT_SYMBOL(machine_to_phys_mapping);
+ unsigned int machine_to_phys_order;
+ EXPORT_SYMBOL(machine_to_phys_order);
+
++#define EBDA_ADDR_POINTER 0x40E
++
++static __init void reserve_ebda(void)
++{
++#ifndef CONFIG_XEN
++ unsigned ebda_addr, ebda_size;
++
++ /*
++ * there is a real-mode segmented pointer pointing to the
++ * 4K EBDA area at 0x40E
++ */
++ ebda_addr = *(unsigned short *)__va(EBDA_ADDR_POINTER);
++ ebda_addr <<= 4;
++
++ if (!ebda_addr)
++ return;
++
++ ebda_size = *(unsigned short *)__va(ebda_addr);
++
++ /* Round EBDA up to pages */
++ if (ebda_size == 0)
++ ebda_size = 1;
++ ebda_size <<= 10;
++ ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
++ if (ebda_size > 64*1024)
++ ebda_size = 64*1024;
++
++ reserve_early(ebda_addr, ebda_addr + ebda_size, "EBDA");
++#endif
++}
++
+ void __init x86_64_start_kernel(char * real_mode_data)
+ {
+ struct xen_machphys_mapping mapping;
+@@ -103,8 +137,16 @@ void __init x86_64_start_kernel(char * r
+ /* Make NULL pointers segfault */
+ zap_identity_mappings();
+
+- for (i = 0; i < IDT_ENTRIES; i++)
++ /* Cleanup the over mapped high alias */
++ cleanup_highmap();
++
++ for (i = 0; i < IDT_ENTRIES; i++) {
++#ifdef CONFIG_EARLY_PRINTK
++ set_intr_gate(i, &early_idt_handlers[i]);
++#else
+ set_intr_gate(i, early_idt_handler);
++#endif
++ }
+ load_idt((const struct desc_ptr *)&idt_descr);
+ #endif
+
+@@ -115,8 +157,19 @@ void __init x86_64_start_kernel(char * r
+
+ pda_init(0);
+ copy_bootdata(__va(real_mode_data));
+-#ifdef CONFIG_SMP
+- cpu_set(0, cpu_online_map);
+-#endif
++
++ reserve_early(__pa_symbol(&_text), __pa_symbol(&_end), "TEXT DATA BSS");
++
++ reserve_early(round_up(__pa_symbol(&_end), PAGE_SIZE),
++ start_pfn << PAGE_SHIFT, "Xen provided");
++
++ reserve_ebda();
++
++ /*
++ * At this point everything still needed from the boot loader
++ * or BIOS or kernel text should be early reserved or marked not
++ * RAM in e820. All other memory is free game.
++ */
++
+ start_kernel();
+ }
+--- a/arch/x86/kernel/init_task-xen.c
++++ b/arch/x86/kernel/init_task-xen.c
+@@ -19,7 +19,7 @@ static struct sighand_struct init_sighan
+ #endif
+ struct mm_struct init_mm = INIT_MM(init_mm);
+ #undef swapper_pg_dir
+-EXPORT_SYMBOL(init_mm);
++EXPORT_UNUSED_SYMBOL(init_mm); /* will be removed in 2.6.26 */
+
+ /*
+ * Initial thread structure.
+--- a/arch/x86/kernel/io_apic_32-xen.c
++++ b/arch/x86/kernel/io_apic_32-xen.c
+@@ -35,6 +35,7 @@
+ #include <linux/htirq.h>
+ #include <linux/freezer.h>
+ #include <linux/kthread.h>
++#include <linux/jiffies.h> /* time_after() */
+
+ #include <asm/io.h>
+ #include <asm/smp.h>
+@@ -48,8 +49,6 @@
+ #include <mach_apic.h>
+ #include <mach_apicdef.h>
+
+-#include "io_ports.h"
+-
+ #ifdef CONFIG_XEN
+ #include <xen/interface/xen.h>
+ #include <xen/interface/physdev.h>
+@@ -400,7 +399,7 @@ static void set_ioapic_affinity_irq(unsi
+ # include <asm/processor.h> /* kernel_thread() */
+ # include <linux/kernel_stat.h> /* kstat */
+ # include <linux/slab.h> /* kmalloc() */
+-# include <linux/timer.h> /* time_after() */
++# include <linux/timer.h>
+
+ #define IRQBALANCE_CHECK_ARCH -999
+ #define MAX_BALANCED_IRQ_INTERVAL (5*HZ)
+@@ -777,7 +776,7 @@ late_initcall(balanced_irq_init);
+ #endif
+
+ #ifndef CONFIG_SMP
+-void fastcall send_IPI_self(int vector)
++void send_IPI_self(int vector)
+ {
+ #ifndef CONFIG_XEN
+ unsigned int cfg;
+@@ -1959,7 +1958,7 @@ static int __init timer_irq_works(void)
+ * might have cached one ExtINT interrupt. Finally, at
+ * least one tick may be lost due to delays.
+ */
+- if (jiffies - t1 > 4)
++ if (time_after(jiffies, t1 + 4))
+ return 1;
+
+ return 0;
+@@ -2142,7 +2141,7 @@ static struct irq_chip lapic_chip __read
+ .eoi = ack_apic,
+ };
+
+-static void setup_nmi (void)
++static void __init setup_nmi(void)
+ {
+ /*
+ * Dirty trick to enable the NMI watchdog ...
+@@ -2155,7 +2154,7 @@ static void setup_nmi (void)
+ */
+ apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ...");
+
+- on_each_cpu(enable_NMI_through_LVT0, NULL, 1, 1);
++ enable_NMI_through_LVT0();
+
+ apic_printk(APIC_VERBOSE, " done.\n");
+ }
+@@ -2479,7 +2478,7 @@ static int ioapic_resume(struct sys_devi
+ }
+
+ static struct sysdev_class ioapic_sysdev_class = {
+- set_kset_name("ioapic"),
++ .name = "ioapic",
+ .suspend = ioapic_suspend,
+ .resume = ioapic_resume,
+ };
+--- a/arch/x86/kernel/io_apic_64-xen.c
++++ b/arch/x86/kernel/io_apic_64-xen.c
+@@ -32,9 +32,11 @@
+ #include <linux/msi.h>
+ #include <linux/htirq.h>
+ #include <linux/dmar.h>
++#include <linux/jiffies.h>
+ #ifdef CONFIG_ACPI
+ #include <acpi/acpi_bus.h>
+ #endif
++#include <linux/bootmem.h>
+
+ #include <asm/idle.h>
+ #include <asm/io.h>
+@@ -1064,7 +1066,7 @@ void __apicdebuginit print_local_APIC(vo
+ v = apic_read(APIC_LVR);
+ printk(KERN_INFO "... APIC VERSION: %08x\n", v);
+ ver = GET_APIC_VERSION(v);
+- maxlvt = get_maxlvt();
++ maxlvt = lapic_get_maxlvt();
+
+ v = apic_read(APIC_TASKPRI);
+ printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
+@@ -1165,7 +1167,7 @@ void __apicdebuginit print_PIC(void)
+ }
+ #endif /* !CONFIG_XEN */
+
+-static void __init enable_IO_APIC(void)
++void __init enable_IO_APIC(void)
+ {
+ union IO_APIC_reg_01 reg_01;
+ #ifndef CONFIG_XEN
+@@ -1299,7 +1301,7 @@ static int __init timer_irq_works(void)
+ */
+
+ /* jiffies wrap? */
+- if (jiffies - t1 > 4)
++ if (time_after(jiffies, t1 + 4))
+ return 1;
+ return 0;
+ }
+@@ -1412,7 +1414,7 @@ static void irq_complete_move(unsigned i
+ if (likely(!cfg->move_in_progress))
+ return;
+
+- vector = ~get_irq_regs()->orig_rax;
++ vector = ~get_irq_regs()->orig_ax;
+ me = smp_processor_id();
+ if ((vector == cfg->vector) && cpu_isset(me, cfg->domain)) {
+ cpumask_t cleanup_mask;
+@@ -1439,7 +1441,7 @@ static void ack_apic_level(unsigned int
+ int do_unmask_irq = 0;
+
+ irq_complete_move(irq);
+-#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
++#ifdef CONFIG_GENERIC_PENDING_IRQ
+ /* If we are moving the irq we need to mask it */
+ if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) {
+ do_unmask_irq = 1;
+@@ -1570,7 +1572,7 @@ static struct hw_interrupt_type lapic_ir
+ .end = end_lapic_irq,
+ };
+
+-static void setup_nmi (void)
++static void __init setup_nmi(void)
+ {
+ /*
+ * Dirty trick to enable the NMI watchdog ...
+@@ -1583,7 +1585,7 @@ static void setup_nmi (void)
+ */
+ printk(KERN_INFO "activating NMI Watchdog ...");
+
+- enable_NMI_through_LVT0(NULL);
++ enable_NMI_through_LVT0();
+
+ printk(" done.\n");
+ }
+@@ -1659,7 +1661,7 @@ static inline void unlock_ExtINT_logic(v
+ *
+ * FIXME: really need to revamp this for modern platforms only.
+ */
+-static inline void check_timer(void)
++static inline void __init check_timer(void)
+ {
+ struct irq_cfg *cfg = irq_cfg + 0;
+ int apic1, pin1, apic2, pin2;
+@@ -1863,7 +1865,7 @@ static int ioapic_resume(struct sys_devi
+ }
+
+ static struct sysdev_class ioapic_sysdev_class = {
+- set_kset_name("ioapic"),
++ .name = "ioapic",
+ .suspend = ioapic_suspend,
+ .resume = ioapic_resume,
+ };
+@@ -2303,5 +2305,93 @@ void __init setup_ioapic_dest(void)
+ }
+ }
+ #endif
+-#endif /* !CONFIG_XEN */
+
++#define IOAPIC_RESOURCE_NAME_SIZE 11
++
++static struct resource *ioapic_resources;
++
++static struct resource * __init ioapic_setup_resources(void)
++{
++ unsigned long n;
++ struct resource *res;
++ char *mem;
++ int i;
++
++ if (nr_ioapics <= 0)
++ return NULL;
++
++ n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource);
++ n *= nr_ioapics;
++
++ mem = alloc_bootmem(n);
++ res = (void *)mem;
++
++ if (mem != NULL) {
++ memset(mem, 0, n);
++ mem += sizeof(struct resource) * nr_ioapics;
++
++ for (i = 0; i < nr_ioapics; i++) {
++ res[i].name = mem;
++ res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
++ sprintf(mem, "IOAPIC %u", i);
++ mem += IOAPIC_RESOURCE_NAME_SIZE;
++ }
++ }
++
++ ioapic_resources = res;
++
++ return res;
++}
++
++void __init ioapic_init_mappings(void)
++{
++ unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
++ struct resource *ioapic_res;
++ int i;
++
++ ioapic_res = ioapic_setup_resources();
++ for (i = 0; i < nr_ioapics; i++) {
++ if (smp_found_config) {
++ ioapic_phys = mp_ioapics[i].mpc_apicaddr;
++ } else {
++ ioapic_phys = (unsigned long)
++ alloc_bootmem_pages(PAGE_SIZE);
++ ioapic_phys = __pa(ioapic_phys);
++ }
++ set_fixmap_nocache(idx, ioapic_phys);
++ apic_printk(APIC_VERBOSE,
++ "mapped IOAPIC to %016lx (%016lx)\n",
++ __fix_to_virt(idx), ioapic_phys);
++ idx++;
++
++ if (ioapic_res != NULL) {
++ ioapic_res->start = ioapic_phys;
++ ioapic_res->end = ioapic_phys + (4 * 1024) - 1;
++ ioapic_res++;
++ }
++ }
++}
++
++static int __init ioapic_insert_resources(void)
++{
++ int i;
++ struct resource *r = ioapic_resources;
++
++ if (!r) {
++ printk(KERN_ERR
++ "IO APIC resources could be not be allocated.\n");
++ return -1;
++ }
++
++ for (i = 0; i < nr_ioapics; i++) {
++ insert_resource(&iomem_resource, r);
++ r++;
++ }
++
++ return 0;
++}
++
++/* Insert the IO APIC resources after PCI initialization has occured to handle
++ * IO APICS that are mapped in on a BAR in PCI space. */
++late_initcall(ioapic_insert_resources);
++#endif /* !CONFIG_XEN */
+--- a/arch/x86/kernel/ioport_32-xen.c
++++ /dev/null
+@@ -1,121 +0,0 @@
+-/*
+- * This contains the io-permission bitmap code - written by obz, with changes
+- * by Linus.
+- */
+-
+-#include <linux/sched.h>
+-#include <linux/kernel.h>
+-#include <linux/capability.h>
+-#include <linux/errno.h>
+-#include <linux/types.h>
+-#include <linux/ioport.h>
+-#include <linux/smp.h>
+-#include <linux/stddef.h>
+-#include <linux/slab.h>
+-#include <linux/thread_info.h>
+-#include <linux/syscalls.h>
+-#include <xen/interface/physdev.h>
+-
+-/* Set EXTENT bits starting at BASE in BITMAP to value TURN_ON. */
+-static void set_bitmap(unsigned long *bitmap, unsigned int base, unsigned int extent, int new_value)
+-{
+- unsigned long mask;
+- unsigned long *bitmap_base = bitmap + (base / BITS_PER_LONG);
+- unsigned int low_index = base & (BITS_PER_LONG-1);
+- int length = low_index + extent;
+-
+- if (low_index != 0) {
+- mask = (~0UL << low_index);
+- if (length < BITS_PER_LONG)
+- mask &= ~(~0UL << length);
+- if (new_value)
+- *bitmap_base++ |= mask;
+- else
+- *bitmap_base++ &= ~mask;
+- length -= BITS_PER_LONG;
+- }
+-
+- mask = (new_value ? ~0UL : 0UL);
+- while (length >= BITS_PER_LONG) {
+- *bitmap_base++ = mask;
+- length -= BITS_PER_LONG;
+- }
+-
+- if (length > 0) {
+- mask = ~(~0UL << length);
+- if (new_value)
+- *bitmap_base++ |= mask;
+- else
+- *bitmap_base++ &= ~mask;
+- }
+-}
+-
+-
+-/*
+- * this changes the io permissions bitmap in the current task.
+- */
+-asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
+-{
+- struct thread_struct * t = ¤t->thread;
+- unsigned long *bitmap;
+- struct physdev_set_iobitmap set_iobitmap;
+-
+- if ((from + num <= from) || (from + num > IO_BITMAP_BITS))
+- return -EINVAL;
+- if (turn_on && !capable(CAP_SYS_RAWIO))
+- return -EPERM;
+-
+- /*
+- * If it's the first ioperm() call in this thread's lifetime, set the
+- * IO bitmap up. ioperm() is much less timing critical than clone(),
+- * this is why we delay this operation until now:
+- */
+- if (!t->io_bitmap_ptr) {
+- bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
+- if (!bitmap)
+- return -ENOMEM;
+-
+- memset(bitmap, 0xff, IO_BITMAP_BYTES);
+- t->io_bitmap_ptr = bitmap;
+- set_thread_flag(TIF_IO_BITMAP);
+-
+- set_xen_guest_handle(set_iobitmap.bitmap, (char *)bitmap);
+- set_iobitmap.nr_ports = IO_BITMAP_BITS;
+- WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap,
+- &set_iobitmap));
+- }
+-
+- set_bitmap(t->io_bitmap_ptr, from, num, !turn_on);
+-
+- return 0;
+-}
+-
+-/*
+- * sys_iopl has to be used when you want to access the IO ports
+- * beyond the 0x3ff range: to get the full 65536 ports bitmapped
+- * you'd need 8kB of bitmaps/process, which is a bit excessive.
+- *
+- * Here we just change the eflags value on the stack: we allow
+- * only the super-user to do it. This depends on the stack-layout
+- * on system-call entry - see also fork() and the signal handling
+- * code.
+- */
+-
+-asmlinkage long sys_iopl(unsigned long unused)
+-{
+- volatile struct pt_regs * regs = (struct pt_regs *) &unused;
+- unsigned int level = regs->ebx;
+- struct thread_struct *t = ¤t->thread;
+- unsigned int old = (t->iopl >> 12) & 3;
+-
+- if (level > 3)
+- return -EINVAL;
+- /* Trying to gain more privileges? */
+- if (level > old) {
+- if (!capable(CAP_SYS_RAWIO))
+- return -EPERM;
+- }
+- t->iopl = level << 12;
+- set_iopl_mask(t->iopl);
+- return 0;
+-}
+--- a/arch/x86/kernel/ioport_64-xen.c
++++ /dev/null
+@@ -1,99 +0,0 @@
+-/*
+- * This contains the io-permission bitmap code - written by obz, with changes
+- * by Linus.
+- */
+-
+-#include <linux/sched.h>
+-#include <linux/kernel.h>
+-#include <linux/capability.h>
+-#include <linux/errno.h>
+-#include <linux/types.h>
+-#include <linux/ioport.h>
+-#include <linux/mm.h>
+-#include <linux/smp.h>
+-#include <linux/stddef.h>
+-#include <linux/slab.h>
+-#include <linux/thread_info.h>
+-#include <linux/syscalls.h>
+-#include <xen/interface/physdev.h>
+-
+-/* Set EXTENT bits starting at BASE in BITMAP to value TURN_ON. */
+-static void set_bitmap(unsigned long *bitmap, unsigned int base, unsigned int extent, int new_value)
+-{
+- int i;
+-
+- if (new_value)
+- for (i = base; i < base + extent; i++)
+- __set_bit(i, bitmap);
+- else
+- for (i = base; i < base + extent; i++)
+- clear_bit(i, bitmap);
+-}
+-
+-/*
+- * this changes the io permissions bitmap in the current task.
+- */
+-asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
+-{
+- struct thread_struct * t = ¤t->thread;
+- unsigned long *bitmap;
+- struct physdev_set_iobitmap set_iobitmap;
+-
+- if ((from + num <= from) || (from + num > IO_BITMAP_BITS))
+- return -EINVAL;
+- if (turn_on && !capable(CAP_SYS_RAWIO))
+- return -EPERM;
+-
+- /*
+- * If it's the first ioperm() call in this thread's lifetime, set the
+- * IO bitmap up. ioperm() is much less timing critical than clone(),
+- * this is why we delay this operation until now:
+- */
+- if (!t->io_bitmap_ptr) {
+- bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
+- if (!bitmap)
+- return -ENOMEM;
+-
+- memset(bitmap, 0xff, IO_BITMAP_BYTES);
+- t->io_bitmap_ptr = bitmap;
+- set_thread_flag(TIF_IO_BITMAP);
+-
+- set_xen_guest_handle(set_iobitmap.bitmap, (char *)bitmap);
+- set_iobitmap.nr_ports = IO_BITMAP_BITS;
+- WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap,
+- &set_iobitmap));
+- }
+-
+- set_bitmap(t->io_bitmap_ptr, from, num, !turn_on);
+-
+- return 0;
+-}
+-
+-/*
+- * sys_iopl has to be used when you want to access the IO ports
+- * beyond the 0x3ff range: to get the full 65536 ports bitmapped
+- * you'd need 8kB of bitmaps/process, which is a bit excessive.
+- *
+- */
+-
+-asmlinkage long sys_iopl(unsigned int new_iopl, struct pt_regs *regs)
+-{
+- unsigned int old_iopl = current->thread.iopl;
+- struct physdev_set_iopl set_iopl;
+-
+- if (new_iopl > 3)
+- return -EINVAL;
+-
+- /* Need "raw I/O" privileges for direct port access. */
+- if ((new_iopl > old_iopl) && !capable(CAP_SYS_RAWIO))
+- return -EPERM;
+-
+- /* Change our version of the privilege levels. */
+- current->thread.iopl = new_iopl;
+-
+- /* Force the change at ring 0. */
+- set_iopl.iopl = (new_iopl == 0) ? 1 : new_iopl;
+- WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
+-
+- return 0;
+-}
+--- /dev/null
++++ b/arch/x86/kernel/ioport-xen.c
+@@ -0,0 +1,112 @@
++/*
++ * This contains the io-permission bitmap code - written by obz, with changes
++ * by Linus. 32/64 bits code unification by Miguel Botón.
++ */
++
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/capability.h>
++#include <linux/errno.h>
++#include <linux/types.h>
++#include <linux/ioport.h>
++#include <linux/smp.h>
++#include <linux/stddef.h>
++#include <linux/slab.h>
++#include <linux/thread_info.h>
++#include <linux/syscalls.h>
++#include <xen/interface/physdev.h>
++
++/* Set EXTENT bits starting at BASE in BITMAP to value TURN_ON. */
++static void set_bitmap(unsigned long *bitmap, unsigned int base,
++ unsigned int extent, int new_value)
++{
++ unsigned int i;
++
++ for (i = base; i < base + extent; i++) {
++ if (new_value)
++ __set_bit(i, bitmap);
++ else
++ __clear_bit(i, bitmap);
++ }
++}
++
++/*
++ * this changes the io permissions bitmap in the current task.
++ */
++asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
++{
++ struct thread_struct * t = ¤t->thread;
++ struct physdev_set_iobitmap set_iobitmap;
++
++ if ((from + num <= from) || (from + num > IO_BITMAP_BITS))
++ return -EINVAL;
++ if (turn_on && !capable(CAP_SYS_RAWIO))
++ return -EPERM;
++
++ /*
++ * If it's the first ioperm() call in this thread's lifetime, set the
++ * IO bitmap up. ioperm() is much less timing critical than clone(),
++ * this is why we delay this operation until now:
++ */
++ if (!t->io_bitmap_ptr) {
++ unsigned long *bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
++
++ if (!bitmap)
++ return -ENOMEM;
++
++ memset(bitmap, 0xff, IO_BITMAP_BYTES);
++ t->io_bitmap_ptr = bitmap;
++ set_thread_flag(TIF_IO_BITMAP);
++
++ set_xen_guest_handle(set_iobitmap.bitmap, (char *)bitmap);
++ set_iobitmap.nr_ports = IO_BITMAP_BITS;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap,
++ &set_iobitmap));
++ }
++
++ set_bitmap(t->io_bitmap_ptr, from, num, !turn_on);
++
++ return 0;
++}
++
++/*
++ * sys_iopl has to be used when you want to access the IO ports
++ * beyond the 0x3ff range: to get the full 65536 ports bitmapped
++ * you'd need 8kB of bitmaps/process, which is a bit excessive.
++ */
++static int do_iopl(unsigned int level, struct thread_struct *t)
++{
++ unsigned int old = t->iopl >> 12;
++
++ if (level > 3)
++ return -EINVAL;
++ /* Trying to gain more privileges? */
++ if (level > old) {
++ if (!capable(CAP_SYS_RAWIO))
++ return -EPERM;
++ }
++
++ return 0;
++}
++
++#ifdef CONFIG_X86_32
++asmlinkage long sys_iopl(unsigned long regsp)
++{
++ struct pt_regs *regs = (struct pt_regs *)®sp;
++ unsigned int level = regs->bx;
++#else
++asmlinkage long sys_iopl(unsigned int level, struct pt_regs *regs)
++{
++#endif
++ struct thread_struct *t = ¤t->thread;
++ int rc;
++
++ rc = do_iopl(level, t);
++ if (rc < 0)
++ goto out;
++
++ t->iopl = level << 12;
++ set_iopl_mask(t->iopl);
++out:
++ return rc;
++}
+--- a/arch/x86/kernel/irq_32-xen.c
++++ b/arch/x86/kernel/irq_32-xen.c
+@@ -66,11 +66,11 @@ static union irq_ctx *softirq_ctx[NR_CPU
+ * SMP cross-CPU interrupts have their own specific
+ * handlers).
+ */
+-fastcall unsigned int do_IRQ(struct pt_regs *regs)
++unsigned int do_IRQ(struct pt_regs *regs)
+ {
+ struct pt_regs *old_regs;
+ /* high bit used in ret_from_ code */
+- int irq = ~regs->orig_eax;
++ int irq = ~regs->orig_ax;
+ struct irq_desc *desc = irq_desc + irq;
+ #ifdef CONFIG_4KSTACKS
+ union irq_ctx *curctx, *irqctx;
+@@ -88,13 +88,13 @@ fastcall unsigned int do_IRQ(struct pt_r
+ #ifdef CONFIG_DEBUG_STACKOVERFLOW
+ /* Debugging check for stack overflow: is there less than 1KB free? */
+ {
+- long esp;
++ long sp;
+
+ __asm__ __volatile__("andl %%esp,%0" :
+- "=r" (esp) : "0" (THREAD_SIZE - 1));
+- if (unlikely(esp < (sizeof(struct thread_info) + STACK_WARN))) {
++ "=r" (sp) : "0" (THREAD_SIZE - 1));
++ if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
+ printk("do_IRQ: stack overflow: %ld\n",
+- esp - sizeof(struct thread_info));
++ sp - sizeof(struct thread_info));
+ dump_stack();
+ }
+ }
+@@ -112,7 +112,7 @@ fastcall unsigned int do_IRQ(struct pt_r
+ * current stack (which is the irq stack already after all)
+ */
+ if (curctx != irqctx) {
+- int arg1, arg2, ebx;
++ int arg1, arg2, bx;
+
+ /* build the stack frame on the IRQ stack */
+ isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
+@@ -128,10 +128,10 @@ fastcall unsigned int do_IRQ(struct pt_r
+ (curctx->tinfo.preempt_count & SOFTIRQ_MASK);
+
+ asm volatile(
+- " xchgl %%ebx,%%esp \n"
+- " call *%%edi \n"
+- " movl %%ebx,%%esp \n"
+- : "=a" (arg1), "=d" (arg2), "=b" (ebx)
++ " xchgl %%ebx,%%esp \n"
++ " call *%%edi \n"
++ " movl %%ebx,%%esp \n"
++ : "=a" (arg1), "=d" (arg2), "=b" (bx)
+ : "0" (irq), "1" (desc), "2" (isp),
+ "D" (desc->handle_irq)
+ : "memory", "cc"
+--- a/arch/x86/kernel/irq_64-xen.c
++++ b/arch/x86/kernel/irq_64-xen.c
+@@ -20,6 +20,28 @@
+
+ atomic_t irq_err_count;
+
++/*
++ * 'what should we do if we get a hw irq event on an illegal vector'.
++ * each architecture has to answer this themselves.
++ */
++void ack_bad_irq(unsigned int irq)
++{
++ printk(KERN_WARNING "unexpected IRQ trap at irq %02x\n", irq);
++#ifdef CONFIG_X86_LOCAL_APIC
++ /*
++ * Currently unexpected vectors happen only on SMP and APIC.
++ * We _must_ ack these because every local APIC has only N
++ * irq slots per priority level, and a 'hanging, unacked' IRQ
++ * holds up an irq slot - in excessive cases (when multiple
++ * unexpected vectors occur) that might lock up the APIC
++ * completely.
++ * But don't ack when the APIC is disabled. -AK
++ */
++ if (!disable_apic)
++ ack_APIC_irq();
++#endif
++}
++
+ #ifdef CONFIG_DEBUG_STACKOVERFLOW
+ /*
+ * Probabilistic stack overflow check:
+@@ -33,11 +55,11 @@ static inline void stack_overflow_check(
+ u64 curbase = (u64)task_stack_page(current);
+ static unsigned long warned = -60*HZ;
+
+- if (regs->rsp >= curbase && regs->rsp <= curbase + THREAD_SIZE &&
+- regs->rsp < curbase + sizeof(struct thread_info) + 128 &&
++ if (regs->sp >= curbase && regs->sp <= curbase + THREAD_SIZE &&
++ regs->sp < curbase + sizeof(struct thread_info) + 128 &&
+ time_after(jiffies, warned + 60*HZ)) {
+- printk("do_IRQ: %s near stack overflow (cur:%Lx,rsp:%lx)\n",
+- current->comm, curbase, regs->rsp);
++ printk("do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
++ current->comm, curbase, regs->sp);
+ show_stack(NULL,NULL);
+ warned = jiffies;
+ }
+@@ -150,7 +172,7 @@ asmlinkage unsigned int do_IRQ(struct pt
+ struct pt_regs *old_regs = set_irq_regs(regs);
+
+ /* high bit used in ret_from_ code */
+- unsigned irq = ~regs->orig_rax;
++ unsigned irq = ~regs->orig_ax;
+
+ /*exit_idle();*/
+ /*irq_enter();*/
+@@ -251,14 +273,3 @@ asmlinkage void do_softirq(void)
+ }
+ local_irq_restore(flags);
+ }
+-
+-#ifndef CONFIG_X86_LOCAL_APIC
+-/*
+- * 'what should we do if we get a hw irq event on an illegal vector'.
+- * each architecture has to answer this themselves.
+- */
+-void ack_bad_irq(unsigned int irq)
+-{
+- printk("unexpected IRQ trap at irq %02x\n", irq);
+-}
+-#endif
+--- a/arch/x86/kernel/ldt_32-xen.c
++++ /dev/null
+@@ -1,265 +0,0 @@
+-/*
+- * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
+- * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
+- */
+-
+-#include <linux/errno.h>
+-#include <linux/sched.h>
+-#include <linux/string.h>
+-#include <linux/mm.h>
+-#include <linux/smp.h>
+-#include <linux/vmalloc.h>
+-#include <linux/slab.h>
+-
+-#include <asm/uaccess.h>
+-#include <asm/system.h>
+-#include <asm/ldt.h>
+-#include <asm/desc.h>
+-#include <asm/mmu_context.h>
+-
+-#ifdef CONFIG_SMP /* avoids "defined but not used" warnig */
+-static void flush_ldt(void *null)
+-{
+- if (current->active_mm)
+- load_LDT(¤t->active_mm->context);
+-}
+-#endif
+-
+-static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
+-{
+- void *oldldt;
+- void *newldt;
+- int oldsize;
+-
+- if (mincount <= pc->size)
+- return 0;
+- oldsize = pc->size;
+- mincount = (mincount+511)&(~511);
+- if (mincount*LDT_ENTRY_SIZE > PAGE_SIZE)
+- newldt = vmalloc(mincount*LDT_ENTRY_SIZE);
+- else
+- newldt = kmalloc(mincount*LDT_ENTRY_SIZE, GFP_KERNEL);
+-
+- if (!newldt)
+- return -ENOMEM;
+-
+- if (oldsize)
+- memcpy(newldt, pc->ldt, oldsize*LDT_ENTRY_SIZE);
+- oldldt = pc->ldt;
+- memset(newldt+oldsize*LDT_ENTRY_SIZE, 0, (mincount-oldsize)*LDT_ENTRY_SIZE);
+- pc->ldt = newldt;
+- wmb();
+- pc->size = mincount;
+- wmb();
+-
+- if (reload) {
+-#ifdef CONFIG_SMP
+- cpumask_t mask;
+- preempt_disable();
+-#endif
+- make_pages_readonly(
+- pc->ldt,
+- (pc->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
+- XENFEAT_writable_descriptor_tables);
+- load_LDT(pc);
+-#ifdef CONFIG_SMP
+- mask = cpumask_of_cpu(smp_processor_id());
+- if (!cpus_equal(current->mm->cpu_vm_mask, mask))
+- smp_call_function(flush_ldt, NULL, 1, 1);
+- preempt_enable();
+-#endif
+- }
+- if (oldsize) {
+- make_pages_writable(
+- oldldt,
+- (oldsize * LDT_ENTRY_SIZE) / PAGE_SIZE,
+- XENFEAT_writable_descriptor_tables);
+- if (oldsize*LDT_ENTRY_SIZE > PAGE_SIZE)
+- vfree(oldldt);
+- else
+- kfree(oldldt);
+- }
+- return 0;
+-}
+-
+-static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
+-{
+- int err = alloc_ldt(new, old->size, 0);
+- if (err < 0)
+- return err;
+- memcpy(new->ldt, old->ldt, old->size*LDT_ENTRY_SIZE);
+- make_pages_readonly(
+- new->ldt,
+- (new->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
+- XENFEAT_writable_descriptor_tables);
+- return 0;
+-}
+-
+-/*
+- * we do not have to muck with descriptors here, that is
+- * done in switch_mm() as needed.
+- */
+-int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+-{
+- struct mm_struct * old_mm;
+- int retval = 0;
+-
+- mutex_init(&mm->context.lock);
+- mm->context.size = 0;
+- mm->context.has_foreign_mappings = 0;
+- old_mm = current->mm;
+- if (old_mm && old_mm->context.size > 0) {
+- mutex_lock(&old_mm->context.lock);
+- retval = copy_ldt(&mm->context, &old_mm->context);
+- mutex_unlock(&old_mm->context.lock);
+- }
+- return retval;
+-}
+-
+-/*
+- * No need to lock the MM as we are the last user
+- */
+-void destroy_context(struct mm_struct *mm)
+-{
+- if (mm->context.size) {
+- if (mm == current->active_mm)
+- clear_LDT();
+- make_pages_writable(
+- mm->context.ldt,
+- (mm->context.size * LDT_ENTRY_SIZE) / PAGE_SIZE,
+- XENFEAT_writable_descriptor_tables);
+- if (mm->context.size*LDT_ENTRY_SIZE > PAGE_SIZE)
+- vfree(mm->context.ldt);
+- else
+- kfree(mm->context.ldt);
+- mm->context.size = 0;
+- }
+-}
+-
+-static int read_ldt(void __user * ptr, unsigned long bytecount)
+-{
+- int err;
+- unsigned long size;
+- struct mm_struct * mm = current->mm;
+-
+- if (!mm->context.size)
+- return 0;
+- if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
+- bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
+-
+- mutex_lock(&mm->context.lock);
+- size = mm->context.size*LDT_ENTRY_SIZE;
+- if (size > bytecount)
+- size = bytecount;
+-
+- err = 0;
+- if (copy_to_user(ptr, mm->context.ldt, size))
+- err = -EFAULT;
+- mutex_unlock(&mm->context.lock);
+- if (err < 0)
+- goto error_return;
+- if (size != bytecount) {
+- /* zero-fill the rest */
+- if (clear_user(ptr+size, bytecount-size) != 0) {
+- err = -EFAULT;
+- goto error_return;
+- }
+- }
+- return bytecount;
+-error_return:
+- return err;
+-}
+-
+-static int read_default_ldt(void __user * ptr, unsigned long bytecount)
+-{
+- int err;
+- unsigned long size;
+-
+- err = 0;
+- size = 5*sizeof(struct desc_struct);
+- if (size > bytecount)
+- size = bytecount;
+-
+- err = size;
+- if (clear_user(ptr, size))
+- err = -EFAULT;
+-
+- return err;
+-}
+-
+-static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
+-{
+- struct mm_struct * mm = current->mm;
+- __u32 entry_1, entry_2;
+- int error;
+- struct user_desc ldt_info;
+-
+- error = -EINVAL;
+- if (bytecount != sizeof(ldt_info))
+- goto out;
+- error = -EFAULT;
+- if (copy_from_user(&ldt_info, ptr, sizeof(ldt_info)))
+- goto out;
+-
+- error = -EINVAL;
+- if (ldt_info.entry_number >= LDT_ENTRIES)
+- goto out;
+- if (ldt_info.contents == 3) {
+- if (oldmode)
+- goto out;
+- if (ldt_info.seg_not_present == 0)
+- goto out;
+- }
+-
+- mutex_lock(&mm->context.lock);
+- if (ldt_info.entry_number >= mm->context.size) {
+- error = alloc_ldt(¤t->mm->context, ldt_info.entry_number+1, 1);
+- if (error < 0)
+- goto out_unlock;
+- }
+-
+- /* Allow LDTs to be cleared by the user. */
+- if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
+- if (oldmode || LDT_empty(&ldt_info)) {
+- entry_1 = 0;
+- entry_2 = 0;
+- goto install;
+- }
+- }
+-
+- entry_1 = LDT_entry_a(&ldt_info);
+- entry_2 = LDT_entry_b(&ldt_info);
+- if (oldmode)
+- entry_2 &= ~(1 << 20);
+-
+- /* Install the new entry ... */
+-install:
+- error = write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
+- entry_1, entry_2);
+-
+-out_unlock:
+- mutex_unlock(&mm->context.lock);
+-out:
+- return error;
+-}
+-
+-asmlinkage int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
+-{
+- int ret = -ENOSYS;
+-
+- switch (func) {
+- case 0:
+- ret = read_ldt(ptr, bytecount);
+- break;
+- case 1:
+- ret = write_ldt(ptr, bytecount, 1);
+- break;
+- case 2:
+- ret = read_default_ldt(ptr, bytecount);
+- break;
+- case 0x11:
+- ret = write_ldt(ptr, bytecount, 0);
+- break;
+- }
+- return ret;
+-}
+--- a/arch/x86/kernel/ldt_64-xen.c
++++ /dev/null
+@@ -1,271 +0,0 @@
+-/*
+- * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
+- * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
+- * Copyright (C) 2002 Andi Kleen
+- *
+- * This handles calls from both 32bit and 64bit mode.
+- */
+-
+-#include <linux/errno.h>
+-#include <linux/sched.h>
+-#include <linux/string.h>
+-#include <linux/mm.h>
+-#include <linux/smp.h>
+-#include <linux/vmalloc.h>
+-#include <linux/slab.h>
+-
+-#include <asm/uaccess.h>
+-#include <asm/system.h>
+-#include <asm/ldt.h>
+-#include <asm/desc.h>
+-#include <asm/proto.h>
+-#include <asm/pgalloc.h>
+-
+-#ifdef CONFIG_SMP /* avoids "defined but not used" warnig */
+-static void flush_ldt(void *null)
+-{
+- if (current->active_mm)
+- load_LDT(¤t->active_mm->context);
+-}
+-#endif
+-
+-static int alloc_ldt(mm_context_t *pc, unsigned mincount, int reload)
+-{
+- void *oldldt;
+- void *newldt;
+- unsigned oldsize;
+-
+- if (mincount <= (unsigned)pc->size)
+- return 0;
+- oldsize = pc->size;
+- mincount = (mincount+511)&(~511);
+- if (mincount*LDT_ENTRY_SIZE > PAGE_SIZE)
+- newldt = vmalloc(mincount*LDT_ENTRY_SIZE);
+- else
+- newldt = kmalloc(mincount*LDT_ENTRY_SIZE, GFP_KERNEL);
+-
+- if (!newldt)
+- return -ENOMEM;
+-
+- if (oldsize)
+- memcpy(newldt, pc->ldt, oldsize*LDT_ENTRY_SIZE);
+- oldldt = pc->ldt;
+- memset(newldt+oldsize*LDT_ENTRY_SIZE, 0, (mincount-oldsize)*LDT_ENTRY_SIZE);
+- wmb();
+- pc->ldt = newldt;
+- wmb();
+- pc->size = mincount;
+- wmb();
+- if (reload) {
+-#ifdef CONFIG_SMP
+- cpumask_t mask;
+-
+- preempt_disable();
+-#endif
+- make_pages_readonly(
+- pc->ldt,
+- (pc->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
+- XENFEAT_writable_descriptor_tables);
+- load_LDT(pc);
+-#ifdef CONFIG_SMP
+- mask = cpumask_of_cpu(smp_processor_id());
+- if (!cpus_equal(current->mm->cpu_vm_mask, mask))
+- smp_call_function(flush_ldt, NULL, 1, 1);
+- preempt_enable();
+-#endif
+- }
+- if (oldsize) {
+- make_pages_writable(
+- oldldt,
+- (oldsize * LDT_ENTRY_SIZE) / PAGE_SIZE,
+- XENFEAT_writable_descriptor_tables);
+- if (oldsize*LDT_ENTRY_SIZE > PAGE_SIZE)
+- vfree(oldldt);
+- else
+- kfree(oldldt);
+- }
+- return 0;
+-}
+-
+-static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
+-{
+- int err = alloc_ldt(new, old->size, 0);
+- if (err < 0)
+- return err;
+- memcpy(new->ldt, old->ldt, old->size*LDT_ENTRY_SIZE);
+- make_pages_readonly(
+- new->ldt,
+- (new->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
+- XENFEAT_writable_descriptor_tables);
+- return 0;
+-}
+-
+-/*
+- * we do not have to muck with descriptors here, that is
+- * done in switch_mm() as needed.
+- */
+-int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+-{
+- struct mm_struct * old_mm;
+- int retval = 0;
+-
+- memset(&mm->context, 0, sizeof(mm->context));
+- mutex_init(&mm->context.lock);
+- old_mm = current->mm;
+- if (old_mm)
+- mm->context.vdso = old_mm->context.vdso;
+- if (old_mm && old_mm->context.size > 0) {
+- mutex_lock(&old_mm->context.lock);
+- retval = copy_ldt(&mm->context, &old_mm->context);
+- mutex_unlock(&old_mm->context.lock);
+- }
+- return retval;
+-}
+-
+-/*
+- *
+- * Don't touch the LDT register - we're already in the next thread.
+- */
+-void destroy_context(struct mm_struct *mm)
+-{
+- if (mm->context.size) {
+- if (mm == current->active_mm)
+- clear_LDT();
+- make_pages_writable(
+- mm->context.ldt,
+- (mm->context.size * LDT_ENTRY_SIZE) / PAGE_SIZE,
+- XENFEAT_writable_descriptor_tables);
+- if (mm->context.size*LDT_ENTRY_SIZE > PAGE_SIZE)
+- vfree(mm->context.ldt);
+- else
+- kfree(mm->context.ldt);
+- mm->context.size = 0;
+- }
+-}
+-
+-static int read_ldt(void __user * ptr, unsigned long bytecount)
+-{
+- int err;
+- unsigned long size;
+- struct mm_struct * mm = current->mm;
+-
+- if (!mm->context.size)
+- return 0;
+- if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
+- bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
+-
+- mutex_lock(&mm->context.lock);
+- size = mm->context.size*LDT_ENTRY_SIZE;
+- if (size > bytecount)
+- size = bytecount;
+-
+- err = 0;
+- if (copy_to_user(ptr, mm->context.ldt, size))
+- err = -EFAULT;
+- mutex_unlock(&mm->context.lock);
+- if (err < 0)
+- goto error_return;
+- if (size != bytecount) {
+- /* zero-fill the rest */
+- if (clear_user(ptr+size, bytecount-size) != 0) {
+- err = -EFAULT;
+- goto error_return;
+- }
+- }
+- return bytecount;
+-error_return:
+- return err;
+-}
+-
+-static int read_default_ldt(void __user * ptr, unsigned long bytecount)
+-{
+- /* Arbitrary number */
+- /* x86-64 default LDT is all zeros */
+- if (bytecount > 128)
+- bytecount = 128;
+- if (clear_user(ptr, bytecount))
+- return -EFAULT;
+- return bytecount;
+-}
+-
+-static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
+-{
+- struct task_struct *me = current;
+- struct mm_struct * mm = me->mm;
+- __u32 entry_1, entry_2, *lp;
+- unsigned long mach_lp;
+- int error;
+- struct user_desc ldt_info;
+-
+- error = -EINVAL;
+-
+- if (bytecount != sizeof(ldt_info))
+- goto out;
+- error = -EFAULT;
+- if (copy_from_user(&ldt_info, ptr, bytecount))
+- goto out;
+-
+- error = -EINVAL;
+- if (ldt_info.entry_number >= LDT_ENTRIES)
+- goto out;
+- if (ldt_info.contents == 3) {
+- if (oldmode)
+- goto out;
+- if (ldt_info.seg_not_present == 0)
+- goto out;
+- }
+-
+- mutex_lock(&mm->context.lock);
+- if (ldt_info.entry_number >= (unsigned)mm->context.size) {
+- error = alloc_ldt(¤t->mm->context, ldt_info.entry_number+1, 1);
+- if (error < 0)
+- goto out_unlock;
+- }
+-
+- lp = (__u32 *) ((ldt_info.entry_number << 3) + (char *) mm->context.ldt);
+- mach_lp = arbitrary_virt_to_machine(lp);
+-
+- /* Allow LDTs to be cleared by the user. */
+- if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
+- if (oldmode || LDT_empty(&ldt_info)) {
+- entry_1 = 0;
+- entry_2 = 0;
+- goto install;
+- }
+- }
+-
+- entry_1 = LDT_entry_a(&ldt_info);
+- entry_2 = LDT_entry_b(&ldt_info);
+- if (oldmode)
+- entry_2 &= ~(1 << 20);
+-
+- /* Install the new entry ... */
+-install:
+- error = HYPERVISOR_update_descriptor(mach_lp, (unsigned long)((entry_1 | (unsigned long) entry_2 << 32)));
+-
+-out_unlock:
+- mutex_unlock(&mm->context.lock);
+-out:
+- return error;
+-}
+-
+-asmlinkage int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
+-{
+- int ret = -ENOSYS;
+-
+- switch (func) {
+- case 0:
+- ret = read_ldt(ptr, bytecount);
+- break;
+- case 1:
+- ret = write_ldt(ptr, bytecount, 1);
+- break;
+- case 2:
+- ret = read_default_ldt(ptr, bytecount);
+- break;
+- case 0x11:
+- ret = write_ldt(ptr, bytecount, 0);
+- break;
+- }
+- return ret;
+-}
+--- /dev/null
++++ b/arch/x86/kernel/ldt-xen.c
+@@ -0,0 +1,272 @@
++/*
++ * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
++ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
++ * Copyright (C) 2002 Andi Kleen
++ *
++ * This handles calls from both 32bit and 64bit mode.
++ */
++
++#include <linux/errno.h>
++#include <linux/sched.h>
++#include <linux/string.h>
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/vmalloc.h>
++
++#include <asm/uaccess.h>
++#include <asm/system.h>
++#include <asm/ldt.h>
++#include <asm/desc.h>
++#include <asm/mmu_context.h>
++
++#ifdef CONFIG_SMP
++static void flush_ldt(void *null)
++{
++ if (current->active_mm)
++ load_LDT(¤t->active_mm->context);
++}
++#endif
++
++static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
++{
++ void *oldldt, *newldt;
++ int oldsize;
++
++ if (mincount <= pc->size)
++ return 0;
++ oldsize = pc->size;
++ mincount = (mincount + (PAGE_SIZE / LDT_ENTRY_SIZE - 1)) &
++ (~(PAGE_SIZE / LDT_ENTRY_SIZE - 1));
++ if (mincount * LDT_ENTRY_SIZE > PAGE_SIZE)
++ newldt = vmalloc(mincount * LDT_ENTRY_SIZE);
++ else
++ newldt = (void *)__get_free_page(GFP_KERNEL);
++
++ if (!newldt)
++ return -ENOMEM;
++
++ if (oldsize)
++ memcpy(newldt, pc->ldt, oldsize * LDT_ENTRY_SIZE);
++ oldldt = pc->ldt;
++ memset(newldt + oldsize * LDT_ENTRY_SIZE, 0,
++ (mincount - oldsize) * LDT_ENTRY_SIZE);
++
++#ifdef CONFIG_X86_64
++ /* CHECKME: Do we really need this ? */
++ wmb();
++#endif
++ pc->ldt = newldt;
++ wmb();
++ pc->size = mincount;
++ wmb();
++
++ if (reload) {
++#ifdef CONFIG_SMP
++ cpumask_t mask;
++
++ preempt_disable();
++#endif
++ make_pages_readonly(newldt,
++ (mincount * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ load_LDT(pc);
++#ifdef CONFIG_SMP
++ mask = cpumask_of_cpu(smp_processor_id());
++ if (!cpus_equal(current->mm->cpu_vm_mask, mask))
++ smp_call_function(flush_ldt, NULL, 1, 1);
++ preempt_enable();
++#endif
++ }
++ if (oldsize) {
++ make_pages_writable(oldldt,
++ (oldsize * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ if (oldsize * LDT_ENTRY_SIZE > PAGE_SIZE)
++ vfree(oldldt);
++ else
++ put_page(virt_to_page(oldldt));
++ }
++ return 0;
++}
++
++static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
++{
++ int err = alloc_ldt(new, old->size, 0);
++
++ if (err < 0)
++ return err;
++ memcpy(new->ldt, old->ldt, old->size * LDT_ENTRY_SIZE);
++ make_pages_readonly(new->ldt,
++ (new->size * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ return 0;
++}
++
++/*
++ * we do not have to muck with descriptors here, that is
++ * done in switch_mm() as needed.
++ */
++int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
++{
++ struct mm_struct *old_mm;
++ int retval = 0;
++
++ memset(&mm->context, 0, sizeof(mm->context));
++ mutex_init(&mm->context.lock);
++ old_mm = current->mm;
++ if (old_mm)
++ mm->context.vdso = old_mm->context.vdso;
++ if (old_mm && old_mm->context.size > 0) {
++ mutex_lock(&old_mm->context.lock);
++ retval = copy_ldt(&mm->context, &old_mm->context);
++ mutex_unlock(&old_mm->context.lock);
++ }
++ return retval;
++}
++
++/*
++ * No need to lock the MM as we are the last user
++ *
++ * 64bit: Don't touch the LDT register - we're already in the next thread.
++ */
++void destroy_context(struct mm_struct *mm)
++{
++ if (mm->context.size) {
++ /* CHECKME: Can this ever happen ? */
++ if (mm == current->active_mm)
++ clear_LDT();
++ make_pages_writable(mm->context.ldt,
++ (mm->context.size * LDT_ENTRY_SIZE) / PAGE_SIZE,
++ XENFEAT_writable_descriptor_tables);
++ if (mm->context.size * LDT_ENTRY_SIZE > PAGE_SIZE)
++ vfree(mm->context.ldt);
++ else
++ put_page(virt_to_page(mm->context.ldt));
++ mm->context.size = 0;
++ }
++}
++
++static int read_ldt(void __user *ptr, unsigned long bytecount)
++{
++ int err;
++ unsigned long size;
++ struct mm_struct *mm = current->mm;
++
++ if (!mm->context.size)
++ return 0;
++ if (bytecount > LDT_ENTRY_SIZE * LDT_ENTRIES)
++ bytecount = LDT_ENTRY_SIZE * LDT_ENTRIES;
++
++ mutex_lock(&mm->context.lock);
++ size = mm->context.size * LDT_ENTRY_SIZE;
++ if (size > bytecount)
++ size = bytecount;
++
++ err = 0;
++ if (copy_to_user(ptr, mm->context.ldt, size))
++ err = -EFAULT;
++ mutex_unlock(&mm->context.lock);
++ if (err < 0)
++ goto error_return;
++ if (size != bytecount) {
++ /* zero-fill the rest */
++ if (clear_user(ptr + size, bytecount - size) != 0) {
++ err = -EFAULT;
++ goto error_return;
++ }
++ }
++ return bytecount;
++error_return:
++ return err;
++}
++
++static int read_default_ldt(void __user *ptr, unsigned long bytecount)
++{
++ /* CHECKME: Can we use _one_ random number ? */
++#ifdef CONFIG_X86_32
++ unsigned long size = 5 * sizeof(struct desc_struct);
++#else
++ unsigned long size = 128;
++#endif
++ if (bytecount > size)
++ bytecount = size;
++ if (clear_user(ptr, bytecount))
++ return -EFAULT;
++ return bytecount;
++}
++
++static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
++{
++ struct mm_struct *mm = current->mm;
++ struct desc_struct ldt;
++ int error;
++ struct user_desc ldt_info;
++
++ error = -EINVAL;
++ if (bytecount != sizeof(ldt_info))
++ goto out;
++ error = -EFAULT;
++ if (copy_from_user(&ldt_info, ptr, sizeof(ldt_info)))
++ goto out;
++
++ error = -EINVAL;
++ if (ldt_info.entry_number >= LDT_ENTRIES)
++ goto out;
++ if (ldt_info.contents == 3) {
++ if (oldmode)
++ goto out;
++ if (ldt_info.seg_not_present == 0)
++ goto out;
++ }
++
++ mutex_lock(&mm->context.lock);
++ if (ldt_info.entry_number >= mm->context.size) {
++ error = alloc_ldt(¤t->mm->context,
++ ldt_info.entry_number + 1, 1);
++ if (error < 0)
++ goto out_unlock;
++ }
++
++ /* Allow LDTs to be cleared by the user. */
++ if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
++ if (oldmode || LDT_empty(&ldt_info)) {
++ memset(&ldt, 0, sizeof(ldt));
++ goto install;
++ }
++ }
++
++ fill_ldt(&ldt, &ldt_info);
++ if (oldmode)
++ ldt.avl = 0;
++
++ /* Install the new entry ... */
++install:
++ error = write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
++
++out_unlock:
++ mutex_unlock(&mm->context.lock);
++out:
++ return error;
++}
++
++asmlinkage int sys_modify_ldt(int func, void __user *ptr,
++ unsigned long bytecount)
++{
++ int ret = -ENOSYS;
++
++ switch (func) {
++ case 0:
++ ret = read_ldt(ptr, bytecount);
++ break;
++ case 1:
++ ret = write_ldt(ptr, bytecount, 1);
++ break;
++ case 2:
++ ret = read_default_ldt(ptr, bytecount);
++ break;
++ case 0x11:
++ ret = write_ldt(ptr, bytecount, 0);
++ break;
++ }
++ return ret;
++}
+--- a/arch/x86/kernel/machine_kexec_64.c
++++ b/arch/x86/kernel/machine_kexec_64.c
+@@ -300,7 +300,9 @@ void machine_kexec(struct kimage *image)
+
+ void arch_crash_save_vmcoreinfo(void)
+ {
++#ifndef CONFIG_XEN /* could really be CONFIG_RELOCATABLE */
+ VMCOREINFO_SYMBOL(phys_base);
++#endif
+ VMCOREINFO_SYMBOL(init_level4_pgt);
+
+ #ifdef CONFIG_NUMA
+--- a/arch/x86/kernel/Makefile
++++ b/arch/x86/kernel/Makefile
+@@ -120,11 +120,10 @@ ifeq ($(CONFIG_X86_64),y)
+
+ obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
+
++ obj-$(CONFIG_XEN) += nmi_64.o
+ time_64-$(CONFIG_XEN) += time_32.o
+ pci-dma_64-$(CONFIG_XEN) += pci-dma_32.o
+ endif
+
+ disabled-obj-$(CONFIG_XEN) := early-quirks.o hpet.o i8253.o i8259_$(BITS).o reboot.o \
+ smpboot_$(BITS).o tsc_$(BITS).o tsc_sync.o
+-disabled-obj-$(CONFIG_XEN_UNPRIVILEGED_GUEST) += mpparse_64.o
+-%/head_64.o %/head_64.s: asflags-$(CONFIG_XEN) :=
+--- a/arch/x86/kernel/microcode-xen.c
++++ b/arch/x86/kernel/microcode-xen.c
+@@ -167,7 +167,7 @@ static int request_microcode(void)
+ }
+
+ op.cmd = XENPF_microcode_update;
+- set_xen_guest_handle(op.u.microcode.data, (void *)firmware->data);
++ set_xen_guest_handle(op.u.microcode.data, firmware->data);
+ op.u.microcode.length = firmware->size;
+ error = HYPERVISOR_platform_op(&op);
+
+--- a/arch/x86/kernel/mpparse_32-xen.c
++++ b/arch/x86/kernel/mpparse_32-xen.c
+@@ -68,7 +68,7 @@ unsigned int def_to_bigsmp = 0;
+ /* Processor that is doing the boot up */
+ unsigned int boot_cpu_physical_apicid = -1U;
+ /* Internal processor count */
+-unsigned int __cpuinitdata num_processors;
++unsigned int num_processors;
+
+ /* Bitmask of physically existing CPUs */
+ physid_mask_t phys_cpu_present_map;
+@@ -265,7 +265,7 @@ static void __init MP_ioapic_info (struc
+ if (!(m->mpc_flags & MPC_APIC_USABLE))
+ return;
+
+- printk(KERN_INFO "I/O APIC #%d Version %d at 0x%lX.\n",
++ printk(KERN_INFO "I/O APIC #%d Version %d at 0x%X.\n",
+ m->mpc_apicid, m->mpc_apicver, m->mpc_apicaddr);
+ if (nr_ioapics >= MAX_IO_APICS) {
+ printk(KERN_CRIT "Max # of I/O APICs (%d) exceeded (found %d).\n",
+@@ -412,9 +412,9 @@ static int __init smp_read_mpc(struct mp
+
+ mps_oem_check(mpc, oem, str);
+
+- printk("APIC at: 0x%lX\n",mpc->mpc_lapic);
++ printk("APIC at: 0x%X\n", mpc->mpc_lapic);
+
+- /*
++ /*
+ * Save the local APIC address (it might be non-default) -- but only
+ * if we're not using ACPI.
+ */
+@@ -728,7 +728,7 @@ static int __init smp_scan_config (unsig
+ unsigned long *bp = isa_bus_to_virt(base);
+ struct intel_mp_floating *mpf;
+
+- Dprintk("Scan SMP from %p for %ld bytes.\n", bp,length);
++ printk(KERN_INFO "Scan SMP from %p for %ld bytes.\n", bp,length);
+ if (sizeof(*mpf) != 16)
+ printk("Error: MPF size\n");
+
+@@ -742,9 +742,10 @@ static int __init smp_scan_config (unsig
+
+ smp_found_config = 1;
+ #ifndef CONFIG_XEN
+- printk(KERN_INFO "found SMP MP-table at %08lx\n",
+- virt_to_phys(mpf));
+- reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE);
++ printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
++ mpf, virt_to_phys(mpf));
++ reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE,
++ BOOTMEM_DEFAULT);
+ if (mpf->mpf_physptr) {
+ /*
+ * We cannot access to MPC table to compute
+@@ -759,11 +760,12 @@ static int __init smp_scan_config (unsig
+ unsigned long end = max_low_pfn * PAGE_SIZE;
+ if (mpf->mpf_physptr + size > end)
+ size = end - mpf->mpf_physptr;
+- reserve_bootmem(mpf->mpf_physptr, size);
++ reserve_bootmem(mpf->mpf_physptr, size,
++ BOOTMEM_DEFAULT);
+ }
+ #else
+- printk(KERN_INFO "found SMP MP-table at %08lx\n",
+- ((unsigned long)bp - (unsigned long)isa_bus_to_virt(base)) + base);
++ printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
++ mpf, ((void *)bp - isa_bus_to_virt(base)) + base);
+ #endif
+
+ mpf_found = mpf;
+@@ -940,14 +942,14 @@ void __init mp_register_ioapic(u8 id, u3
+ */
+ mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid;
+ mp_ioapic_routing[idx].gsi_base = gsi_base;
+- mp_ioapic_routing[idx].gsi_end = gsi_base +
++ mp_ioapic_routing[idx].gsi_end = gsi_base +
+ io_apic_get_redir_entries(idx);
+
+- printk("IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
+- "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
+- mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
+- mp_ioapic_routing[idx].gsi_base,
+- mp_ioapic_routing[idx].gsi_end);
++ printk("IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
++ "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
++ mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
++ mp_ioapic_routing[idx].gsi_base,
++ mp_ioapic_routing[idx].gsi_end);
+ }
+
+ void __init
+@@ -1063,15 +1065,16 @@ void __init mp_config_acpi_legacy_irqs (
+ }
+
+ #define MAX_GSI_NUM 4096
++#define IRQ_COMPRESSION_START 64
+
+ int mp_register_gsi(u32 gsi, int triggering, int polarity)
+ {
+ int ioapic = -1;
+ int ioapic_pin = 0;
+ int idx, bit = 0;
+- static int pci_irq = 16;
++ static int pci_irq = IRQ_COMPRESSION_START;
+ /*
+- * Mapping between Global System Interrups, which
++ * Mapping between Global System Interrupts, which
+ * represent all possible interrupts, and IRQs
+ * assigned to actual devices.
+ */
+@@ -1108,12 +1111,16 @@ int mp_register_gsi(u32 gsi, int trigger
+ if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
+ Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
+ mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
+- return gsi_to_irq[gsi];
++ return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
+ }
+
+ mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit);
+
+- if (triggering == ACPI_LEVEL_SENSITIVE) {
++ /*
++ * For GSI >= 64, use IRQ compression
++ */
++ if ((gsi >= IRQ_COMPRESSION_START)
++ && (triggering == ACPI_LEVEL_SENSITIVE)) {
+ /*
+ * For PCI devices assign IRQs in order, avoiding gaps
+ * due to unused I/O APIC pins.
+--- a/arch/x86/kernel/mpparse_64-xen.c
++++ b/arch/x86/kernel/mpparse_64-xen.c
+@@ -60,14 +60,20 @@ unsigned int boot_cpu_id = -1U;
+ EXPORT_SYMBOL(boot_cpu_id);
+
+ /* Internal processor count */
+-unsigned int num_processors __cpuinitdata = 0;
++unsigned int num_processors;
+
+ unsigned disabled_cpus __cpuinitdata;
+
+ /* Bitmask of physically existing CPUs */
+ physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
+
+-u8 bios_cpu_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
++#ifndef CONFIG_XEN
++u16 x86_bios_cpu_apicid_init[NR_CPUS] __initdata
++ = { [0 ... NR_CPUS-1] = BAD_APICID };
++void *x86_bios_cpu_apicid_early_ptr;
++#endif
++DEFINE_PER_CPU(u16, x86_bios_cpu_apicid) = BAD_APICID;
++EXPORT_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
+
+
+ /*
+@@ -119,24 +125,22 @@ static void __cpuinit MP_processor_info(
+ physid_set(m->mpc_apicid, phys_cpu_present_map);
+ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
+ /*
+- * bios_cpu_apicid is required to have processors listed
++ * x86_bios_cpu_apicid is required to have processors listed
+ * in same order as logical cpu numbers. Hence the first
+ * entry is BSP, and so on.
+ */
+ cpu = 0;
+ }
+- bios_cpu_apicid[cpu] = m->mpc_apicid;
+- /*
+- * We get called early in the the start_kernel initialization
+- * process when the per_cpu data area is not yet setup, so we
+- * use a static array that is removed after the per_cpu data
+- * area is created.
+- */
+- if (x86_cpu_to_apicid_ptr) {
+- u8 *x86_cpu_to_apicid = (u8 *)x86_cpu_to_apicid_ptr;
+- x86_cpu_to_apicid[cpu] = m->mpc_apicid;
++ /* are we being called early in kernel startup? */
++ if (x86_cpu_to_apicid_early_ptr) {
++ u16 *cpu_to_apicid = x86_cpu_to_apicid_early_ptr;
++ u16 *bios_cpu_apicid = x86_bios_cpu_apicid_early_ptr;
++
++ cpu_to_apicid[cpu] = m->mpc_apicid;
++ bios_cpu_apicid[cpu] = m->mpc_apicid;
+ } else {
+ per_cpu(x86_cpu_to_apicid, cpu) = m->mpc_apicid;
++ per_cpu(x86_bios_cpu_apicid, cpu) = m->mpc_apicid;
+ }
+
+ cpu_set(cpu, cpu_possible_map);
+--- a/arch/x86/kernel/pci-dma-xen.c
++++ b/arch/x86/kernel/pci-dma-xen.c
+@@ -434,3 +434,23 @@ dma_sync_single_for_device(struct device
+ swiotlb_sync_single_for_device(dev, dma_handle, size, direction);
+ }
+ EXPORT_SYMBOL(dma_sync_single_for_device);
++
++void
++dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
++ enum dma_data_direction direction)
++{
++ if (swiotlb)
++ swiotlb_sync_sg_for_cpu(dev,sg,nelems,direction);
++ flush_write_buffers();
++}
++EXPORT_SYMBOL(dma_sync_sg_for_cpu);
++
++void
++dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
++ enum dma_data_direction direction)
++{
++ if (swiotlb)
++ swiotlb_sync_sg_for_device(dev,sg,nelems,direction);
++ flush_write_buffers();
++}
++EXPORT_SYMBOL(dma_sync_sg_for_device);
+--- a/arch/x86/kernel/process_32-xen.c
++++ b/arch/x86/kernel/process_32-xen.c
+@@ -23,7 +23,6 @@
+ #include <linux/slab.h>
+ #include <linux/vmalloc.h>
+ #include <linux/user.h>
+-#include <linux/a.out.h>
+ #include <linux/interrupt.h>
+ #include <linux/utsname.h>
+ #include <linux/delay.h>
+@@ -59,8 +58,10 @@
+
+ #include <asm/tlbflush.h>
+ #include <asm/cpu.h>
++#include <asm/kdebug.h>
+
+ asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
++asmlinkage void cstar_ret_from_fork(void) __asm__("cstar_ret_from_fork");
+
+ static int hlt_counter;
+
+@@ -78,7 +79,7 @@ EXPORT_PER_CPU_SYMBOL(cpu_number);
+ */
+ unsigned long thread_saved_pc(struct task_struct *tsk)
+ {
+- return ((unsigned long *)tsk->thread.esp)[3];
++ return ((unsigned long *)tsk->thread.sp)[3];
+ }
+
+ /*
+@@ -86,7 +87,6 @@ unsigned long thread_saved_pc(struct tas
+ */
+ void (*pm_idle)(void);
+ EXPORT_SYMBOL(pm_idle);
+-static DEFINE_PER_CPU(unsigned int, cpu_idle_state);
+
+ void disable_hlt(void)
+ {
+@@ -107,7 +107,7 @@ EXPORT_SYMBOL(enable_hlt);
+ * to poll the ->work.need_resched flag instead of waiting for the
+ * cross-CPU IPI to arrive. Use this option with caution.
+ */
+-static void poll_idle (void)
++static void poll_idle(void)
+ {
+ cpu_relax();
+ }
+@@ -122,10 +122,19 @@ static void xen_idle(void)
+ smp_mb();
+
+ local_irq_disable();
+- if (!need_resched())
++ if (!need_resched()) {
++ ktime_t t0, t1;
++ u64 t0n, t1n;
++
++ t0 = ktime_get();
++ t0n = ktime_to_ns(t0);
+ safe_halt(); /* enables interrupts racelessly */
+- else
+- local_irq_enable();
++ local_irq_disable();
++ t1 = ktime_get();
++ t1n = ktime_to_ns(t1);
++ sched_clock_idle_wakeup_event(t1n - t0n);
++ }
++ local_irq_enable();
+ current_thread_info()->status |= TS_POLLING;
+ }
+ #ifdef CONFIG_APM_MODULE
+@@ -168,13 +177,13 @@ void cpu_idle(void)
+ while (!need_resched()) {
+ void (*idle)(void);
+
+- if (__get_cpu_var(cpu_idle_state))
+- __get_cpu_var(cpu_idle_state) = 0;
+-
+ check_pgt_cache();
+ rmb();
+ idle = xen_idle; /* no alternatives */
+
++ if (rcu_pending(cpu))
++ rcu_check_callbacks(cpu, 0);
++
+ if (cpu_is_offline(cpu))
+ play_dead();
+
+@@ -192,40 +201,19 @@ static void do_nothing(void *unused)
+ {
+ }
+
++/*
++ * cpu_idle_wait - Used to ensure that all the CPUs discard old value of
++ * pm_idle and update to new pm_idle value. Required while changing pm_idle
++ * handler on SMP systems.
++ *
++ * Caller must have changed pm_idle to the new value before the call. Old
++ * pm_idle value will not be used by any CPU after the return of this function.
++ */
+ void cpu_idle_wait(void)
+ {
+- unsigned int cpu, this_cpu = get_cpu();
+- cpumask_t map, tmp = current->cpus_allowed;
+-
+- set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
+- put_cpu();
+-
+- cpus_clear(map);
+- for_each_online_cpu(cpu) {
+- per_cpu(cpu_idle_state, cpu) = 1;
+- cpu_set(cpu, map);
+- }
+-
+- __get_cpu_var(cpu_idle_state) = 0;
+-
+- wmb();
+- do {
+- ssleep(1);
+- for_each_online_cpu(cpu) {
+- if (cpu_isset(cpu, map) && !per_cpu(cpu_idle_state, cpu))
+- cpu_clear(cpu, map);
+- }
+- cpus_and(map, map, cpu_online_map);
+- /*
+- * We waited 1 sec, if a CPU still did not call idle
+- * it may be because it is in idle and not waking up
+- * because it has nothing to do.
+- * Give all the remaining CPUS a kick.
+- */
+- smp_call_function_mask(map, do_nothing, 0, 0);
+- } while (!cpus_empty(map));
+-
+- set_cpus_allowed(current, tmp);
++ smp_mb();
++ /* kick all the CPUs so that they exit out of pm_idle */
++ smp_call_function(do_nothing, NULL, 0, 1);
+ }
+ EXPORT_SYMBOL_GPL(cpu_idle_wait);
+
+@@ -251,15 +239,15 @@ void __show_registers(struct pt_regs *re
+ {
+ unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
+ unsigned long d0, d1, d2, d3, d6, d7;
+- unsigned long esp;
++ unsigned long sp;
+ unsigned short ss, gs;
+
+ if (user_mode_vm(regs)) {
+- esp = regs->esp;
+- ss = regs->xss & 0xffff;
++ sp = regs->sp;
++ ss = regs->ss & 0xffff;
+ savesegment(gs, gs);
+ } else {
+- esp = (unsigned long) (®s->esp);
++ sp = (unsigned long) (®s->sp);
+ savesegment(ss, ss);
+ savesegment(gs, gs);
+ }
+@@ -272,17 +260,17 @@ void __show_registers(struct pt_regs *re
+ init_utsname()->version);
+
+ printk("EIP: %04x:[<%08lx>] EFLAGS: %08lx CPU: %d\n",
+- 0xffff & regs->xcs, regs->eip, regs->eflags,
++ 0xffff & regs->cs, regs->ip, regs->flags,
+ smp_processor_id());
+- print_symbol("EIP is at %s\n", regs->eip);
++ print_symbol("EIP is at %s\n", regs->ip);
+
+ printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
+- regs->eax, regs->ebx, regs->ecx, regs->edx);
++ regs->ax, regs->bx, regs->cx, regs->dx);
+ printk("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n",
+- regs->esi, regs->edi, regs->ebp, esp);
++ regs->si, regs->di, regs->bp, sp);
+ printk(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n",
+- regs->xds & 0xffff, regs->xes & 0xffff,
+- regs->xfs & 0xffff, gs, ss);
++ regs->ds & 0xffff, regs->es & 0xffff,
++ regs->fs & 0xffff, gs, ss);
+
+ if (!all)
+ return;
+@@ -310,12 +298,12 @@ void __show_registers(struct pt_regs *re
+ void show_regs(struct pt_regs *regs)
+ {
+ __show_registers(regs, 1);
+- show_trace(NULL, regs, ®s->esp);
++ show_trace(NULL, regs, ®s->sp, regs->bp);
+ }
+
+ /*
+- * This gets run with %ebx containing the
+- * function to call, and %edx containing
++ * This gets run with %bx containing the
++ * function to call, and %dx containing
+ * the "args".
+ */
+ extern void kernel_thread_helper(void);
+@@ -329,16 +317,16 @@ int kernel_thread(int (*fn)(void *), voi
+
+ memset(®s, 0, sizeof(regs));
+
+- regs.ebx = (unsigned long) fn;
+- regs.edx = (unsigned long) arg;
++ regs.bx = (unsigned long) fn;
++ regs.dx = (unsigned long) arg;
+
+- regs.xds = __USER_DS;
+- regs.xes = __USER_DS;
+- regs.xfs = __KERNEL_PERCPU;
+- regs.orig_eax = -1;
+- regs.eip = (unsigned long) kernel_thread_helper;
+- regs.xcs = __KERNEL_CS | get_kernel_rpl();
+- regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
++ regs.ds = __USER_DS;
++ regs.es = __USER_DS;
++ regs.fs = __KERNEL_PERCPU;
++ regs.orig_ax = -1;
++ regs.ip = (unsigned long) kernel_thread_helper;
++ regs.cs = __KERNEL_CS | get_kernel_rpl();
++ regs.flags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
+
+ /* Ok, create the new process.. */
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL);
+@@ -368,7 +356,12 @@ void flush_thread(void)
+ {
+ struct task_struct *tsk = current;
+
+- memset(tsk->thread.debugreg, 0, sizeof(unsigned long)*8);
++ tsk->thread.debugreg0 = 0;
++ tsk->thread.debugreg1 = 0;
++ tsk->thread.debugreg2 = 0;
++ tsk->thread.debugreg3 = 0;
++ tsk->thread.debugreg6 = 0;
++ tsk->thread.debugreg7 = 0;
+ memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
+ clear_tsk_thread_flag(tsk, TIF_DEBUG);
+ /*
+@@ -393,7 +386,7 @@ void prepare_to_copy(struct task_struct
+ unlazy_fpu(tsk);
+ }
+
+-int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
++int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
+ unsigned long unused,
+ struct task_struct * p, struct pt_regs * regs)
+ {
+@@ -403,17 +396,19 @@ int copy_thread(int nr, unsigned long cl
+
+ childregs = task_pt_regs(p);
+ *childregs = *regs;
+- childregs->eax = 0;
+- childregs->esp = esp;
++ childregs->ax = 0;
++ childregs->sp = sp;
+
+- p->thread.esp = (unsigned long) childregs;
+- p->thread.esp0 = (unsigned long) (childregs+1);
++ p->thread.sp = (unsigned long) childregs;
++ p->thread.sp0 = (unsigned long) (childregs+1);
+
+- p->thread.eip = (unsigned long) ret_from_fork;
++ p->thread.ip = (unsigned long) ret_from_fork;
+
+- savesegment(gs,p->thread.gs);
++ savesegment(gs, p->thread.gs);
+
+ tsk = current;
++ if (test_tsk_thread_flag(tsk, TIF_CSTAR))
++ p->thread.ip = (unsigned long) cstar_ret_from_fork;
+ if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
+ p->thread.io_bitmap_ptr = kmemdup(tsk->thread.io_bitmap_ptr,
+ IO_BITMAP_BYTES, GFP_KERNEL);
+@@ -424,34 +419,17 @@ int copy_thread(int nr, unsigned long cl
+ set_tsk_thread_flag(p, TIF_IO_BITMAP);
+ }
+
++ err = 0;
++
+ /*
+ * Set a new TLS for the child thread?
+ */
+- if (clone_flags & CLONE_SETTLS) {
+- struct desc_struct *desc;
+- struct user_desc info;
+- int idx;
+-
+- err = -EFAULT;
+- if (copy_from_user(&info, (void __user *)childregs->esi, sizeof(info)))
+- goto out;
+- err = -EINVAL;
+- if (LDT_empty(&info))
+- goto out;
+-
+- idx = info.entry_number;
+- if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+- goto out;
+-
+- desc = p->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
+- desc->a = LDT_entry_a(&info);
+- desc->b = LDT_entry_b(&info);
+- }
++ if (clone_flags & CLONE_SETTLS)
++ err = do_set_thread_area(p, -1,
++ (struct user_desc __user *)childregs->si, 0);
+
+ p->thread.iopl = current->thread.iopl;
+
+- err = 0;
+- out:
+ if (err && p->thread.io_bitmap_ptr) {
+ kfree(p->thread.io_bitmap_ptr);
+ p->thread.io_bitmap_max = 0;
+@@ -459,67 +437,8 @@ int copy_thread(int nr, unsigned long cl
+ return err;
+ }
+
+-/*
+- * fill in the user structure for a core dump..
+- */
+-void dump_thread(struct pt_regs * regs, struct user * dump)
+-{
+- int i;
+-
+-/* changed the size calculations - should hopefully work better. lbt */
+- dump->magic = CMAGIC;
+- dump->start_code = 0;
+- dump->start_stack = regs->esp & ~(PAGE_SIZE - 1);
+- dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
+- dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
+- dump->u_dsize -= dump->u_tsize;
+- dump->u_ssize = 0;
+- for (i = 0; i < 8; i++)
+- dump->u_debugreg[i] = current->thread.debugreg[i];
+-
+- if (dump->start_stack < TASK_SIZE)
+- dump->u_ssize = ((unsigned long) (TASK_SIZE - dump->start_stack)) >> PAGE_SHIFT;
+-
+- dump->regs.ebx = regs->ebx;
+- dump->regs.ecx = regs->ecx;
+- dump->regs.edx = regs->edx;
+- dump->regs.esi = regs->esi;
+- dump->regs.edi = regs->edi;
+- dump->regs.ebp = regs->ebp;
+- dump->regs.eax = regs->eax;
+- dump->regs.ds = regs->xds;
+- dump->regs.es = regs->xes;
+- dump->regs.fs = regs->xfs;
+- savesegment(gs,dump->regs.gs);
+- dump->regs.orig_eax = regs->orig_eax;
+- dump->regs.eip = regs->eip;
+- dump->regs.cs = regs->xcs;
+- dump->regs.eflags = regs->eflags;
+- dump->regs.esp = regs->esp;
+- dump->regs.ss = regs->xss;
+-
+- dump->u_fpvalid = dump_fpu (regs, &dump->i387);
+-}
+-EXPORT_SYMBOL(dump_thread);
+-
+-/*
+- * Capture the user space registers if the task is not running (in user space)
+- */
+-int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
+-{
+- struct pt_regs ptregs = *task_pt_regs(tsk);
+- ptregs.xcs &= 0xffff;
+- ptregs.xds &= 0xffff;
+- ptregs.xes &= 0xffff;
+- ptregs.xss &= 0xffff;
+-
+- elf_core_copy_regs(regs, &ptregs);
+-
+- return 1;
+-}
+-
+ #ifdef CONFIG_SECCOMP
+-void hard_disable_TSC(void)
++static void hard_disable_TSC(void)
+ {
+ write_cr4(read_cr4() | X86_CR4_TSD);
+ }
+@@ -534,7 +453,7 @@ void disable_TSC(void)
+ hard_disable_TSC();
+ preempt_enable();
+ }
+-void hard_enable_TSC(void)
++static void hard_enable_TSC(void)
+ {
+ write_cr4(read_cr4() & ~X86_CR4_TSD);
+ }
+@@ -543,18 +462,32 @@ void hard_enable_TSC(void)
+ static noinline void
+ __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p)
+ {
+- struct thread_struct *next;
++ struct thread_struct *prev, *next;
++ unsigned long debugctl;
+
++ prev = &prev_p->thread;
+ next = &next_p->thread;
+
++ debugctl = prev->debugctlmsr;
++ if (next->ds_area_msr != prev->ds_area_msr) {
++ /* we clear debugctl to make sure DS
++ * is not in use when we change it */
++ debugctl = 0;
++ wrmsrl(MSR_IA32_DEBUGCTLMSR, 0);
++ wrmsr(MSR_IA32_DS_AREA, next->ds_area_msr, 0);
++ }
++
++ if (next->debugctlmsr != debugctl)
++ wrmsr(MSR_IA32_DEBUGCTLMSR, next->debugctlmsr, 0);
++
+ if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
+- set_debugreg(next->debugreg[0], 0);
+- set_debugreg(next->debugreg[1], 1);
+- set_debugreg(next->debugreg[2], 2);
+- set_debugreg(next->debugreg[3], 3);
++ set_debugreg(next->debugreg0, 0);
++ set_debugreg(next->debugreg1, 1);
++ set_debugreg(next->debugreg2, 2);
++ set_debugreg(next->debugreg3, 3);
+ /* no 4 and 5 */
+- set_debugreg(next->debugreg[6], 6);
+- set_debugreg(next->debugreg[7], 7);
++ set_debugreg(next->debugreg6, 6);
++ set_debugreg(next->debugreg7, 7);
+ }
+
+ #ifdef CONFIG_SECCOMP
+@@ -567,6 +500,14 @@ __switch_to_xtra(struct task_struct *pre
+ hard_enable_TSC();
+ }
+ #endif
++
++#ifdef X86_BTS
++ if (test_tsk_thread_flag(prev_p, TIF_BTS_TRACE_TS))
++ ptrace_bts_take_timestamp(prev_p, BTS_TASK_DEPARTS);
++
++ if (test_tsk_thread_flag(next_p, TIF_BTS_TRACE_TS))
++ ptrace_bts_take_timestamp(next_p, BTS_TASK_ARRIVES);
++#endif
+ }
+
+ /*
+@@ -592,11 +533,11 @@ __switch_to_xtra(struct task_struct *pre
+ * More important, however, is the fact that this allows us much
+ * more flexibility.
+ *
+- * The return value (in %eax) will be the "prev" task after
++ * The return value (in %ax) will be the "prev" task after
+ * the task-switch, and shows up in ret_from_fork in entry.S,
+ * for example.
+ */
+-struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
++struct task_struct * __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
+ {
+ struct thread_struct *prev = &prev_p->thread,
+ *next = &next_p->thread;
+@@ -632,12 +573,12 @@ struct task_struct fastcall * __switch_t
+ #endif
+
+ /*
+- * Reload esp0.
+- * This is load_esp0(tss, next) with a multicall.
++ * Reload sp0.
++ * This is load_sp0(tss, next) with a multicall.
+ */
+ mcl->op = __HYPERVISOR_stack_switch;
+ mcl->args[0] = __KERNEL_DS;
+- mcl->args[1] = next->esp0;
++ mcl->args[1] = next->sp0;
+ mcl++;
+
+ /*
+@@ -734,7 +675,7 @@ struct task_struct fastcall * __switch_t
+
+ asmlinkage int sys_fork(struct pt_regs regs)
+ {
+- return do_fork(SIGCHLD, regs.esp, ®s, 0, NULL, NULL);
++ return do_fork(SIGCHLD, regs.sp, ®s, 0, NULL, NULL);
+ }
+
+ asmlinkage int sys_clone(struct pt_regs regs)
+@@ -743,12 +684,12 @@ asmlinkage int sys_clone(struct pt_regs
+ unsigned long newsp;
+ int __user *parent_tidptr, *child_tidptr;
+
+- clone_flags = regs.ebx;
+- newsp = regs.ecx;
+- parent_tidptr = (int __user *)regs.edx;
+- child_tidptr = (int __user *)regs.edi;
++ clone_flags = regs.bx;
++ newsp = regs.cx;
++ parent_tidptr = (int __user *)regs.dx;
++ child_tidptr = (int __user *)regs.di;
+ if (!newsp)
+- newsp = regs.esp;
++ newsp = regs.sp;
+ return do_fork(clone_flags, newsp, ®s, 0, parent_tidptr, child_tidptr);
+ }
+
+@@ -764,7 +705,7 @@ asmlinkage int sys_clone(struct pt_regs
+ */
+ asmlinkage int sys_vfork(struct pt_regs regs)
+ {
+- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.esp, ®s, 0, NULL, NULL);
++ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.sp, ®s, 0, NULL, NULL);
+ }
+
+ /*
+@@ -775,18 +716,15 @@ asmlinkage int sys_execve(struct pt_regs
+ int error;
+ char * filename;
+
+- filename = getname((char __user *) regs.ebx);
++ filename = getname((char __user *) regs.bx);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ goto out;
+ error = do_execve(filename,
+- (char __user * __user *) regs.ecx,
+- (char __user * __user *) regs.edx,
++ (char __user * __user *) regs.cx,
++ (char __user * __user *) regs.dx,
+ ®s);
+ if (error == 0) {
+- task_lock(current);
+- current->ptrace &= ~PT_DTRACE;
+- task_unlock(current);
+ /* Make sure we don't return using sysenter.. */
+ set_thread_flag(TIF_IRET);
+ }
+@@ -800,145 +738,37 @@ out:
+
+ unsigned long get_wchan(struct task_struct *p)
+ {
+- unsigned long ebp, esp, eip;
++ unsigned long bp, sp, ip;
+ unsigned long stack_page;
+ int count = 0;
+ if (!p || p == current || p->state == TASK_RUNNING)
+ return 0;
+ stack_page = (unsigned long)task_stack_page(p);
+- esp = p->thread.esp;
+- if (!stack_page || esp < stack_page || esp > top_esp+stack_page)
++ sp = p->thread.sp;
++ if (!stack_page || sp < stack_page || sp > top_esp+stack_page)
+ return 0;
+- /* include/asm-i386/system.h:switch_to() pushes ebp last. */
+- ebp = *(unsigned long *) esp;
++ /* include/asm-i386/system.h:switch_to() pushes bp last. */
++ bp = *(unsigned long *) sp;
+ do {
+- if (ebp < stack_page || ebp > top_ebp+stack_page)
++ if (bp < stack_page || bp > top_ebp+stack_page)
+ return 0;
+- eip = *(unsigned long *) (ebp+4);
+- if (!in_sched_functions(eip))
+- return eip;
+- ebp = *(unsigned long *) ebp;
++ ip = *(unsigned long *) (bp+4);
++ if (!in_sched_functions(ip))
++ return ip;
++ bp = *(unsigned long *) bp;
+ } while (count++ < 16);
+ return 0;
+ }
+
+-/*
+- * sys_alloc_thread_area: get a yet unused TLS descriptor index.
+- */
+-static int get_free_idx(void)
+-{
+- struct thread_struct *t = ¤t->thread;
+- int idx;
+-
+- for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
+- if (desc_empty(t->tls_array + idx))
+- return idx + GDT_ENTRY_TLS_MIN;
+- return -ESRCH;
+-}
+-
+-/*
+- * Set a given TLS descriptor:
+- */
+-asmlinkage int sys_set_thread_area(struct user_desc __user *u_info)
+-{
+- struct thread_struct *t = ¤t->thread;
+- struct user_desc info;
+- struct desc_struct *desc;
+- int cpu, idx;
+-
+- if (copy_from_user(&info, u_info, sizeof(info)))
+- return -EFAULT;
+- idx = info.entry_number;
+-
+- /*
+- * index -1 means the kernel should try to find and
+- * allocate an empty descriptor:
+- */
+- if (idx == -1) {
+- idx = get_free_idx();
+- if (idx < 0)
+- return idx;
+- if (put_user(idx, &u_info->entry_number))
+- return -EFAULT;
+- }
+-
+- if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+- return -EINVAL;
+-
+- desc = t->tls_array + idx - GDT_ENTRY_TLS_MIN;
+-
+- /*
+- * We must not get preempted while modifying the TLS.
+- */
+- cpu = get_cpu();
+-
+- if (LDT_empty(&info)) {
+- desc->a = 0;
+- desc->b = 0;
+- } else {
+- desc->a = LDT_entry_a(&info);
+- desc->b = LDT_entry_b(&info);
+- }
+- load_TLS(t, cpu);
+-
+- put_cpu();
+-
+- return 0;
+-}
+-
+-/*
+- * Get the current Thread-Local Storage area:
+- */
+-
+-#define GET_BASE(desc) ( \
+- (((desc)->a >> 16) & 0x0000ffff) | \
+- (((desc)->b << 16) & 0x00ff0000) | \
+- ( (desc)->b & 0xff000000) )
+-
+-#define GET_LIMIT(desc) ( \
+- ((desc)->a & 0x0ffff) | \
+- ((desc)->b & 0xf0000) )
+-
+-#define GET_32BIT(desc) (((desc)->b >> 22) & 1)
+-#define GET_CONTENTS(desc) (((desc)->b >> 10) & 3)
+-#define GET_WRITABLE(desc) (((desc)->b >> 9) & 1)
+-#define GET_LIMIT_PAGES(desc) (((desc)->b >> 23) & 1)
+-#define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
+-#define GET_USEABLE(desc) (((desc)->b >> 20) & 1)
+-
+-asmlinkage int sys_get_thread_area(struct user_desc __user *u_info)
+-{
+- struct user_desc info;
+- struct desc_struct *desc;
+- int idx;
+-
+- if (get_user(idx, &u_info->entry_number))
+- return -EFAULT;
+- if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+- return -EINVAL;
+-
+- memset(&info, 0, sizeof(info));
+-
+- desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
+-
+- info.entry_number = idx;
+- info.base_addr = GET_BASE(desc);
+- info.limit = GET_LIMIT(desc);
+- info.seg_32bit = GET_32BIT(desc);
+- info.contents = GET_CONTENTS(desc);
+- info.read_exec_only = !GET_WRITABLE(desc);
+- info.limit_in_pages = GET_LIMIT_PAGES(desc);
+- info.seg_not_present = !GET_PRESENT(desc);
+- info.useable = GET_USEABLE(desc);
+-
+- if (copy_to_user(u_info, &info, sizeof(info)))
+- return -EFAULT;
+- return 0;
+-}
+-
+ unsigned long arch_align_stack(unsigned long sp)
+ {
+ if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+ sp -= get_random_int() % 8192;
+ return sp & ~0xf;
+ }
++
++unsigned long arch_randomize_brk(struct mm_struct *mm)
++{
++ unsigned long range_end = mm->brk + 0x02000000;
++ return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
++}
+--- a/arch/x86/kernel/process_64-xen.c
++++ b/arch/x86/kernel/process_64-xen.c
+@@ -3,7 +3,7 @@
+ *
+ * Pentium III FXSR, SSE support
+ * Gareth Hughes <gareth@valinux.com>, May 2000
+- *
++ *
+ * X86-64 port
+ * Andi Kleen.
+ *
+@@ -22,19 +22,18 @@
+ #include <linux/cpu.h>
+ #include <linux/errno.h>
+ #include <linux/sched.h>
++#include <linux/fs.h>
+ #include <linux/kernel.h>
+ #include <linux/mm.h>
+-#include <linux/fs.h>
+ #include <linux/elfcore.h>
+ #include <linux/smp.h>
+ #include <linux/slab.h>
+ #include <linux/user.h>
+-#include <linux/module.h>
+-#include <linux/a.out.h>
+ #include <linux/interrupt.h>
++#include <linux/utsname.h>
+ #include <linux/delay.h>
++#include <linux/module.h>
+ #include <linux/ptrace.h>
+-#include <linux/utsname.h>
+ #include <linux/random.h>
+ #include <linux/notifier.h>
+ #include <linux/kprobes.h>
+@@ -73,7 +72,6 @@ EXPORT_SYMBOL(boot_option_idle_override)
+ */
+ void (*pm_idle)(void);
+ EXPORT_SYMBOL(pm_idle);
+-static DEFINE_PER_CPU(unsigned int, cpu_idle_state);
+
+ static ATOMIC_NOTIFIER_HEAD(idle_notifier);
+
+@@ -81,13 +79,6 @@ void idle_notifier_register(struct notif
+ {
+ atomic_notifier_chain_register(&idle_notifier, n);
+ }
+-EXPORT_SYMBOL_GPL(idle_notifier_register);
+-
+-void idle_notifier_unregister(struct notifier_block *n)
+-{
+- atomic_notifier_chain_unregister(&idle_notifier, n);
+-}
+-EXPORT_SYMBOL(idle_notifier_unregister);
+
+ void enter_idle(void)
+ {
+@@ -116,7 +107,7 @@ void exit_idle(void)
+ * to poll the ->need_resched flag instead of waiting for the
+ * cross-CPU IPI to arrive. Use this option with caution.
+ */
+-static void poll_idle (void)
++static void poll_idle(void)
+ {
+ local_irq_enable();
+ cpu_relax();
+@@ -131,10 +122,19 @@ static void xen_idle(void)
+ */
+ smp_mb();
+ local_irq_disable();
+- if (!need_resched())
+- safe_halt();
+- else
+- local_irq_enable();
++ if (!need_resched()) {
++ ktime_t t0, t1;
++ u64 t0n, t1n;
++
++ t0 = ktime_get();
++ t0n = ktime_to_ns(t0);
++ safe_halt(); /* enables interrupts racelessly */
++ local_irq_disable();
++ t1 = ktime_get();
++ t1n = ktime_to_ns(t1);
++ sched_clock_idle_wakeup_event(t1n - t0n);
++ }
++ local_irq_enable();
+ current_thread_info()->status |= TS_POLLING;
+ }
+
+@@ -161,19 +161,15 @@ static inline void play_dead(void)
+ * low exit latency (ie sit in a loop waiting for
+ * somebody to say that they'd like to reschedule)
+ */
+-void cpu_idle (void)
++void cpu_idle(void)
+ {
+ current_thread_info()->status |= TS_POLLING;
+ /* endless idle loop with no priority at all */
+ while (1) {
++ tick_nohz_stop_sched_tick();
+ while (!need_resched()) {
+ void (*idle)(void);
+
+- if (__get_cpu_var(cpu_idle_state))
+- __get_cpu_var(cpu_idle_state) = 0;
+-
+- tick_nohz_stop_sched_tick();
+-
+ rmb();
+ idle = xen_idle; /* no alternatives */
+ if (cpu_is_offline(smp_processor_id()))
+@@ -203,49 +199,27 @@ static void do_nothing(void *unused)
+ {
+ }
+
++/*
++ * cpu_idle_wait - Used to ensure that all the CPUs discard old value of
++ * pm_idle and update to new pm_idle value. Required while changing pm_idle
++ * handler on SMP systems.
++ *
++ * Caller must have changed pm_idle to the new value before the call. Old
++ * pm_idle value will not be used by any CPU after the return of this function.
++ */
+ void cpu_idle_wait(void)
+ {
+- unsigned int cpu, this_cpu = get_cpu();
+- cpumask_t map, tmp = current->cpus_allowed;
+-
+- set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
+- put_cpu();
+-
+- cpus_clear(map);
+- for_each_online_cpu(cpu) {
+- per_cpu(cpu_idle_state, cpu) = 1;
+- cpu_set(cpu, map);
+- }
+-
+- __get_cpu_var(cpu_idle_state) = 0;
+-
+- wmb();
+- do {
+- ssleep(1);
+- for_each_online_cpu(cpu) {
+- if (cpu_isset(cpu, map) &&
+- !per_cpu(cpu_idle_state, cpu))
+- cpu_clear(cpu, map);
+- }
+- cpus_and(map, map, cpu_online_map);
+- /*
+- * We waited 1 sec, if a CPU still did not call idle
+- * it may be because it is in idle and not waking up
+- * because it has nothing to do.
+- * Give all the remaining CPUS a kick.
+- */
+- smp_call_function_mask(map, do_nothing, 0, 0);
+- } while (!cpus_empty(map));
+-
+- set_cpus_allowed(current, tmp);
++ smp_mb();
++ /* kick all the CPUs so that they exit out of pm_idle */
++ smp_call_function(do_nothing, NULL, 0, 1);
+ }
+ EXPORT_SYMBOL_GPL(cpu_idle_wait);
+
+-void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
++void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
+ {
+ }
+
+-static int __init idle_setup (char *str)
++static int __init idle_setup(char *str)
+ {
+ if (!strcmp(str, "poll")) {
+ printk("using polling idle threads.\n");
+@@ -260,13 +234,13 @@ static int __init idle_setup (char *str)
+ }
+ early_param("idle", idle_setup);
+
+-/* Prints also some state that isn't saved in the pt_regs */
++/* Prints also some state that isn't saved in the pt_regs */
+ void __show_regs(struct pt_regs * regs)
+ {
+ unsigned long fs, gs, shadowgs;
+ unsigned long d0, d1, d2, d3, d6, d7;
+- unsigned int fsindex,gsindex;
+- unsigned int ds,cs,es;
++ unsigned int fsindex, gsindex;
++ unsigned int ds, cs, es;
+
+ printk("\n");
+ print_modules();
+@@ -275,16 +249,16 @@ void __show_regs(struct pt_regs * regs)
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+- printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
+- printk_address(regs->rip);
+- printk("RSP: %04lx:%016lx EFLAGS: %08lx\n", regs->ss, regs->rsp,
+- regs->eflags);
++ printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->ip);
++ printk_address(regs->ip, 1);
++ printk("RSP: %04lx:%016lx EFLAGS: %08lx\n", regs->ss, regs->sp,
++ regs->flags);
+ printk("RAX: %016lx RBX: %016lx RCX: %016lx\n",
+- regs->rax, regs->rbx, regs->rcx);
++ regs->ax, regs->bx, regs->cx);
+ printk("RDX: %016lx RSI: %016lx RDI: %016lx\n",
+- regs->rdx, regs->rsi, regs->rdi);
++ regs->dx, regs->si, regs->di);
+ printk("RBP: %016lx R08: %016lx R09: %016lx\n",
+- regs->rbp, regs->r8, regs->r9);
++ regs->bp, regs->r8, regs->r9);
+ printk("R10: %016lx R11: %016lx R12: %016lx\n",
+ regs->r10, regs->r11, regs->r12);
+ printk("R13: %016lx R14: %016lx R15: %016lx\n",
+@@ -318,7 +292,7 @@ void show_regs(struct pt_regs *regs)
+ {
+ printk("CPU %d:", smp_processor_id());
+ __show_regs(regs);
+- show_trace(NULL, regs, (void *)(regs + 1));
++ show_trace(NULL, regs, (void *)(regs + 1), regs->bp);
+ }
+
+ /*
+@@ -329,7 +303,7 @@ void exit_thread(void)
+ struct task_struct *me = current;
+ struct thread_struct *t = &me->thread;
+
+- if (me->thread.io_bitmap_ptr) {
++ if (me->thread.io_bitmap_ptr) {
+ #ifndef CONFIG_X86_NO_TSS
+ struct tss_struct *tss = &per_cpu(init_tss, get_cpu());
+ #endif
+@@ -382,7 +356,7 @@ void flush_thread(void)
+ tsk->thread.debugreg3 = 0;
+ tsk->thread.debugreg6 = 0;
+ tsk->thread.debugreg7 = 0;
+- memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
++ memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
+ /*
+ * Forget coprocessor state..
+ */
+@@ -405,26 +379,21 @@ void release_thread(struct task_struct *
+
+ static inline void set_32bit_tls(struct task_struct *t, int tls, u32 addr)
+ {
+- struct user_desc ud = {
++ struct user_desc ud = {
+ .base_addr = addr,
+ .limit = 0xfffff,
+ .seg_32bit = 1,
+ .limit_in_pages = 1,
+ .useable = 1,
+ };
+- struct n_desc_struct *desc = (void *)t->thread.tls_array;
++ struct desc_struct *desc = t->thread.tls_array;
+ desc += tls;
+- desc->a = LDT_entry_a(&ud);
+- desc->b = LDT_entry_b(&ud);
++ fill_ldt(desc, &ud);
+ }
+
+ static inline u32 read_32bit_tls(struct task_struct *t, int tls)
+ {
+- struct desc_struct *desc = (void *)t->thread.tls_array;
+- desc += tls;
+- return desc->base0 |
+- (((u32)desc->base1) << 16) |
+- (((u32)desc->base2) << 24);
++ return get_desc_base(&t->thread.tls_array[tls]);
+ }
+
+ /*
+@@ -436,7 +405,7 @@ void prepare_to_copy(struct task_struct
+ unlazy_fpu(tsk);
+ }
+
+-int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp,
++int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
+ unsigned long unused,
+ struct task_struct * p, struct pt_regs * regs)
+ {
+@@ -448,14 +417,14 @@ int copy_thread(int nr, unsigned long cl
+ (THREAD_SIZE + task_stack_page(p))) - 1;
+ *childregs = *regs;
+
+- childregs->rax = 0;
+- childregs->rsp = rsp;
+- if (rsp == ~0UL)
+- childregs->rsp = (unsigned long)childregs;
+-
+- p->thread.rsp = (unsigned long) childregs;
+- p->thread.rsp0 = (unsigned long) (childregs+1);
+- p->thread.userrsp = me->thread.userrsp;
++ childregs->ax = 0;
++ childregs->sp = sp;
++ if (sp == ~0UL)
++ childregs->sp = (unsigned long)childregs;
++
++ p->thread.sp = (unsigned long) childregs;
++ p->thread.sp0 = (unsigned long) (childregs+1);
++ p->thread.usersp = me->thread.usersp;
+
+ set_tsk_thread_flag(p, TIF_FORK);
+
+@@ -476,7 +445,7 @@ int copy_thread(int nr, unsigned long cl
+ memcpy(p->thread.io_bitmap_ptr, me->thread.io_bitmap_ptr,
+ IO_BITMAP_BYTES);
+ set_tsk_thread_flag(p, TIF_IO_BITMAP);
+- }
++ }
+
+ /*
+ * Set a new TLS for the child thread?
+@@ -484,7 +453,8 @@ int copy_thread(int nr, unsigned long cl
+ if (clone_flags & CLONE_SETTLS) {
+ #ifdef CONFIG_IA32_EMULATION
+ if (test_thread_flag(TIF_IA32))
+- err = ia32_child_tls(p, childregs);
++ err = do_set_thread_area(p, -1,
++ (struct user_desc __user *)childregs->si, 0);
+ else
+ #endif
+ err = do_arch_prctl(p, ARCH_SET_FS, childregs->r8);
+@@ -502,26 +472,32 @@ out:
+ return err;
+ }
+
+-static inline void __save_init_fpu( struct task_struct *tsk )
+-{
+- asm volatile( "rex64 ; fxsave %0 ; fnclex"
+- : "=m" (tsk->thread.i387.fxsave));
+- tsk->thread_info->status &= ~TS_USEDFPU;
+-}
+-
+ /*
+ * This special macro can be used to load a debugging register
+ */
+-#define loaddebug(thread,r) set_debugreg(thread->debugreg ## r, r)
++#define loaddebug(thread, r) set_debugreg(thread->debugreg ## r, r)
+
+ static inline void __switch_to_xtra(struct task_struct *prev_p,
+- struct task_struct *next_p)
++ struct task_struct *next_p)
+ {
+ struct thread_struct *prev, *next;
++ unsigned long debugctl;
+
+ prev = &prev_p->thread,
+ next = &next_p->thread;
+
++ debugctl = prev->debugctlmsr;
++ if (next->ds_area_msr != prev->ds_area_msr) {
++ /* we clear debugctl to make sure DS
++ * is not in use when we change it */
++ debugctl = 0;
++ wrmsrl(MSR_IA32_DEBUGCTLMSR, 0);
++ wrmsrl(MSR_IA32_DS_AREA, next->ds_area_msr);
++ }
++
++ if (next->debugctlmsr != debugctl)
++ wrmsrl(MSR_IA32_DEBUGCTLMSR, next->debugctlmsr);
++
+ if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
+ loaddebug(next, 0);
+ loaddebug(next, 1);
+@@ -531,12 +507,20 @@ static inline void __switch_to_xtra(stru
+ loaddebug(next, 6);
+ loaddebug(next, 7);
+ }
++
++#ifdef X86_BTS
++ if (test_tsk_thread_flag(prev_p, TIF_BTS_TRACE_TS))
++ ptrace_bts_take_timestamp(prev_p, BTS_TASK_DEPARTS);
++
++ if (test_tsk_thread_flag(next_p, TIF_BTS_TRACE_TS))
++ ptrace_bts_take_timestamp(next_p, BTS_TASK_ARRIVES);
++#endif
+ }
+
+ /*
+ * switch_to(x,y) should switch tasks from x to y.
+ *
+- * This could still be optimized:
++ * This could still be optimized:
+ * - fold all the options into a flag word and test it with a single test.
+ * - could test fs/gs bitsliced
+ *
+@@ -547,7 +531,7 @@ __switch_to(struct task_struct *prev_p,
+ {
+ struct thread_struct *prev = &prev_p->thread,
+ *next = &next_p->thread;
+- int cpu = smp_processor_id();
++ int cpu = smp_processor_id();
+ #ifndef CONFIG_X86_NO_TSS
+ struct tss_struct *tss = &per_cpu(init_tss, cpu);
+ #endif
+@@ -581,11 +565,12 @@ __switch_to(struct task_struct *prev_p,
+ prev_p->fpu_counter = 0;
+
+ /*
+- * Reload esp0, LDT and the page table pointer:
++ * Reload sp0.
++ * This is load_sp0(tss, next) with a multicall.
+ */
+ mcl->op = __HYPERVISOR_stack_switch;
+ mcl->args[0] = __KERNEL_DS;
+- mcl->args[1] = next->rsp0;
++ mcl->args[1] = next->sp0;
+ mcl++;
+
+ /*
+@@ -593,11 +578,12 @@ __switch_to(struct task_struct *prev_p,
+ * This is load_TLS(next, cpu) with multicalls.
+ */
+ #define C(i) do { \
+- if (unlikely(next->tls_array[i] != prev->tls_array[i])) { \
++ if (unlikely(next->tls_array[i].a != prev->tls_array[i].a || \
++ next->tls_array[i].b != prev->tls_array[i].b)) { \
+ mcl->op = __HYPERVISOR_update_descriptor; \
+ mcl->args[0] = virt_to_machine( \
+- &cpu_gdt(cpu)[GDT_ENTRY_TLS_MIN + i]); \
+- mcl->args[1] = next->tls_array[i]; \
++ &get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i]);\
++ mcl->args[1] = *(u64 *)&next->tls_array[i]; \
+ mcl++; \
+ } \
+ } while (0)
+@@ -605,7 +591,7 @@ __switch_to(struct task_struct *prev_p,
+ #undef C
+
+ if (unlikely(prev->iopl != next->iopl)) {
+- iopl_op.iopl = (next->iopl == 0) ? 1 : next->iopl;
++ iopl_op.iopl = (next->iopl == 0) ? 1 : (next->iopl >> 12) & 3;
+ #if CONFIG_XEN_COMPAT > 0x030002
+ mcl->op = __HYPERVISOR_physdev_op;
+ mcl->args[0] = PHYSDEVOP_set_iopl;
+@@ -669,8 +655,8 @@ __switch_to(struct task_struct *prev_p,
+ /*
+ * Switch the PDA context.
+ */
+- prev->userrsp = read_pda(oldrsp);
+- write_pda(oldrsp, next->userrsp);
++ prev->usersp = read_pda(oldrsp);
++ write_pda(oldrsp, next->usersp);
+ write_pda(pcurrent, next_p);
+ write_pda(kernelstack,
+ (unsigned long)task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET);
+@@ -687,7 +673,8 @@ __switch_to(struct task_struct *prev_p,
+ /*
+ * Now maybe reload the debug registers
+ */
+- if (unlikely(task_thread_info(next_p)->flags & _TIF_WORK_CTXSW))
++ if (unlikely(task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT ||
++ task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW_PREV))
+ __switch_to_xtra(prev_p, next_p);
+
+ /* If the task has used fpu the last 5 timeslices, just do a full
+@@ -702,23 +689,18 @@ __switch_to(struct task_struct *prev_p,
+ /*
+ * sys_execve() executes a new program.
+ */
+-asmlinkage
++asmlinkage
+ long sys_execve(char __user *name, char __user * __user *argv,
+- char __user * __user *envp, struct pt_regs regs)
++ char __user * __user *envp, struct pt_regs *regs)
+ {
+ long error;
+ char * filename;
+
+ filename = getname(name);
+ error = PTR_ERR(filename);
+- if (IS_ERR(filename))
++ if (IS_ERR(filename))
+ return error;
+- error = do_execve(filename, argv, envp, ®s);
+- if (error == 0) {
+- task_lock(current);
+- current->ptrace &= ~PT_DTRACE;
+- task_unlock(current);
+- }
++ error = do_execve(filename, argv, envp, regs);
+ putname(filename);
+ return error;
+ }
+@@ -728,18 +710,18 @@ void set_personality_64bit(void)
+ /* inherit personality from parent */
+
+ /* Make sure to be in 64bit mode */
+- clear_thread_flag(TIF_IA32);
++ clear_thread_flag(TIF_IA32);
+
+ /* TBD: overwrites user setup. Should have two bits.
+ But 64bit processes have always behaved this way,
+ so it's not too bad. The main problem is just that
+- 32bit childs are affected again. */
++ 32bit childs are affected again. */
+ current->personality &= ~READ_IMPLIES_EXEC;
+ }
+
+ asmlinkage long sys_fork(struct pt_regs *regs)
+ {
+- return do_fork(SIGCHLD, regs->rsp, regs, 0, NULL, NULL);
++ return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
+ }
+
+ asmlinkage long
+@@ -747,7 +729,7 @@ sys_clone(unsigned long clone_flags, uns
+ void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
+ {
+ if (!newsp)
+- newsp = regs->rsp;
++ newsp = regs->sp;
+ return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
+ }
+
+@@ -763,29 +745,29 @@ sys_clone(unsigned long clone_flags, uns
+ */
+ asmlinkage long sys_vfork(struct pt_regs *regs)
+ {
+- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->rsp, regs, 0,
++ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, regs, 0,
+ NULL, NULL);
+ }
+
+ unsigned long get_wchan(struct task_struct *p)
+ {
+ unsigned long stack;
+- u64 fp,rip;
++ u64 fp,ip;
+ int count = 0;
+
+ if (!p || p == current || p->state==TASK_RUNNING)
+ return 0;
+ stack = (unsigned long)task_stack_page(p);
+- if (p->thread.rsp < stack || p->thread.rsp > stack+THREAD_SIZE)
++ if (p->thread.sp < stack || p->thread.sp > stack+THREAD_SIZE)
+ return 0;
+- fp = *(u64 *)(p->thread.rsp);
++ fp = *(u64 *)(p->thread.sp);
+ do {
+ if (fp < (unsigned long)stack ||
+ fp > (unsigned long)stack+THREAD_SIZE)
+ return 0;
+- rip = *(u64 *)(fp+8);
+- if (!in_sched_functions(rip))
+- return rip;
++ ip = *(u64 *)(fp+8);
++ if (!in_sched_functions(ip))
++ return ip;
+ fp = *(u64 *)fp;
+ } while (count++ < 16);
+ return 0;
+@@ -827,19 +809,19 @@ long do_arch_prctl(struct task_struct *t
+ /* Not strictly needed for fs, but do it for symmetry
+ with gs */
+ if (addr >= TASK_SIZE_OF(task))
+- return -EPERM;
++ return -EPERM;
+ cpu = get_cpu();
+- /* handle small bases via the GDT because that's faster to
++ /* handle small bases via the GDT because that's faster to
+ switch. */
+- if (addr <= 0xffffffff) {
++ if (addr <= 0xffffffff) {
+ set_32bit_tls(task, FS_TLS, addr);
+- if (doit) {
+- load_TLS(&task->thread, cpu);
++ if (doit) {
++ load_TLS(&task->thread, cpu);
+ asm volatile("movl %0,%%fs" :: "r"(FS_TLS_SEL));
+ }
+ task->thread.fsindex = FS_TLS_SEL;
+ task->thread.fs = 0;
+- } else {
++ } else {
+ task->thread.fsindex = 0;
+ task->thread.fs = addr;
+ if (doit) {
+@@ -852,24 +834,24 @@ long do_arch_prctl(struct task_struct *t
+ }
+ put_cpu();
+ break;
+- case ARCH_GET_FS: {
+- unsigned long base;
++ case ARCH_GET_FS: {
++ unsigned long base;
+ if (task->thread.fsindex == FS_TLS_SEL)
+ base = read_32bit_tls(task, FS_TLS);
+ else if (doit)
+ rdmsrl(MSR_FS_BASE, base);
+ else
+ base = task->thread.fs;
+- ret = put_user(base, (unsigned long __user *)addr);
+- break;
++ ret = put_user(base, (unsigned long __user *)addr);
++ break;
+ }
+- case ARCH_GET_GS: {
++ case ARCH_GET_GS: {
+ unsigned long base;
+ unsigned gsindex;
+ if (task->thread.gsindex == GS_TLS_SEL)
+ base = read_32bit_tls(task, GS_TLS);
+ else if (doit) {
+- asm("movl %%gs,%0" : "=r" (gsindex));
++ asm("movl %%gs,%0" : "=r" (gsindex));
+ if (gsindex)
+ rdmsrl(MSR_KERNEL_GS_BASE, base);
+ else
+@@ -877,40 +859,21 @@ long do_arch_prctl(struct task_struct *t
+ }
+ else
+ base = task->thread.gs;
+- ret = put_user(base, (unsigned long __user *)addr);
++ ret = put_user(base, (unsigned long __user *)addr);
+ break;
+ }
+
+ default:
+ ret = -EINVAL;
+ break;
+- }
++ }
+
+- return ret;
+-}
++ return ret;
++}
+
+ long sys_arch_prctl(int code, unsigned long addr)
+ {
+ return do_arch_prctl(current, code, addr);
+-}
+-
+-/*
+- * Capture the user space registers if the task is not running (in user space)
+- */
+-int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
+-{
+- struct pt_regs *pp, ptregs;
+-
+- pp = task_pt_regs(tsk);
+-
+- ptregs = *pp;
+- ptregs.cs &= 0xffff;
+- ptregs.ss &= 0xffff;
+-
+- elf_core_copy_regs(regs, &ptregs);
+-
+- boot_option_idle_override = 1;
+- return 1;
+ }
+
+ unsigned long arch_align_stack(unsigned long sp)
+@@ -919,3 +882,9 @@ unsigned long arch_align_stack(unsigned
+ sp -= get_random_int() % 8192;
+ return sp & ~0xf;
+ }
++
++unsigned long arch_randomize_brk(struct mm_struct *mm)
++{
++ unsigned long range_end = mm->brk + 0x02000000;
++ return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
++}
+--- a/arch/x86/kernel/quirks-xen.c
++++ b/arch/x86/kernel/quirks-xen.c
+@@ -9,7 +9,7 @@
+ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
+ {
+ u8 config, rev;
+- u32 word;
++ u16 word;
+
+ /* BIOS may enable hardware IRQ balancing for
+ * E7520/E7320/E7525(revision ID 0x9 and below)
+@@ -24,14 +24,17 @@ static void __devinit quirk_intel_irqbal
+ pci_read_config_byte(dev, 0xf4, &config);
+ pci_write_config_byte(dev, 0xf4, config|0x2);
+
+- /* read xTPR register */
+- raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
++ /*
++ * read xTPR register. We may not have a pci_dev for device 8
++ * because it might be hidden until the above write.
++ */
++ pci_bus_read_config_word(dev->bus, PCI_DEVFN(8, 0), 0x4c, &word);
+
+ if (!(word & (1 << 13))) {
+ struct xen_platform_op op;
+
+- printk(KERN_INFO "Intel E7520/7320/7525 detected. "
+- "Disabling irq balancing and affinity\n");
++ dev_info(&dev->dev, "Intel E7520/7320/7525 detected; "
++ "disabling irq balancing and affinity\n");
+ op.cmd = XENPF_platform_quirk;
+ op.u.platform_quirk.quirk_id = QUIRK_NOIRQBALANCING;
+ WARN_ON(HYPERVISOR_platform_op(&op));
+@@ -102,14 +105,16 @@ static void ich_force_enable_hpet(struct
+ pci_read_config_dword(dev, 0xF0, &rcba);
+ rcba &= 0xFFFFC000;
+ if (rcba == 0) {
+- printk(KERN_DEBUG "RCBA disabled. Cannot force enable HPET\n");
++ dev_printk(KERN_DEBUG, &dev->dev, "RCBA disabled; "
++ "cannot force enable HPET\n");
+ return;
+ }
+
+ /* use bits 31:14, 16 kB aligned */
+ rcba_base = ioremap_nocache(rcba, 0x4000);
+ if (rcba_base == NULL) {
+- printk(KERN_DEBUG "ioremap failed. Cannot force enable HPET\n");
++ dev_printk(KERN_DEBUG, &dev->dev, "ioremap failed; "
++ "cannot force enable HPET\n");
+ return;
+ }
+
+@@ -120,8 +125,8 @@ static void ich_force_enable_hpet(struct
+ /* HPET is enabled in HPTC. Just not reported by BIOS */
+ val = val & 0x3;
+ force_hpet_address = 0xFED00000 | (val << 12);
+- printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
+- force_hpet_address);
++ dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
++ "0x%lx\n", force_hpet_address);
+ iounmap(rcba_base);
+ return;
+ }
+@@ -140,11 +145,12 @@ static void ich_force_enable_hpet(struct
+ if (err) {
+ force_hpet_address = 0;
+ iounmap(rcba_base);
+- printk(KERN_DEBUG "Failed to force enable HPET\n");
++ dev_printk(KERN_DEBUG, &dev->dev,
++ "Failed to force enable HPET\n");
+ } else {
+ force_hpet_resume_type = ICH_FORCE_HPET_RESUME;
+- printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
+- force_hpet_address);
++ dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
++ "0x%lx\n", force_hpet_address);
+ }
+ }
+
+@@ -160,6 +166,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_I
+ ich_force_enable_hpet);
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
+ ich_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7,
++ ich_force_enable_hpet);
+
+
+ static struct pci_dev *cached_dev;
+@@ -204,8 +212,8 @@ static void old_ich_force_enable_hpet(st
+ if (val & 0x4) {
+ val &= 0x3;
+ force_hpet_address = 0xFED00000 | (val << 12);
+- printk(KERN_DEBUG "HPET at base address 0x%lx\n",
+- force_hpet_address);
++ dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
++ force_hpet_address);
+ return;
+ }
+
+@@ -225,14 +233,14 @@ static void old_ich_force_enable_hpet(st
+ /* HPET is enabled in HPTC. Just not reported by BIOS */
+ val &= 0x3;
+ force_hpet_address = 0xFED00000 | (val << 12);
+- printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
+- force_hpet_address);
++ dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
++ "0x%lx\n", force_hpet_address);
+ cached_dev = dev;
+ force_hpet_resume_type = OLD_ICH_FORCE_HPET_RESUME;
+ return;
+ }
+
+- printk(KERN_DEBUG "Failed to force enable HPET\n");
++ dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
+ }
+
+ /*
+@@ -290,8 +298,8 @@ static void vt8237_force_enable_hpet(str
+ */
+ if (val & 0x80) {
+ force_hpet_address = (val & ~0x3ff);
+- printk(KERN_DEBUG "HPET at base address 0x%lx\n",
+- force_hpet_address);
++ dev_printk(KERN_DEBUG, &dev->dev, "HPET at 0x%lx\n",
++ force_hpet_address);
+ return;
+ }
+
+@@ -305,14 +313,14 @@ static void vt8237_force_enable_hpet(str
+ pci_read_config_dword(dev, 0x68, &val);
+ if (val & 0x80) {
+ force_hpet_address = (val & ~0x3ff);
+- printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
+- force_hpet_address);
++ dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at "
++ "0x%lx\n", force_hpet_address);
+ cached_dev = dev;
+ force_hpet_resume_type = VT8237_FORCE_HPET_RESUME;
+ return;
+ }
+
+- printk(KERN_DEBUG "Failed to force enable HPET\n");
++ dev_printk(KERN_DEBUG, &dev->dev, "Failed to force enable HPET\n");
+ }
+
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235,
+@@ -340,7 +348,7 @@ static void nvidia_force_enable_hpet(str
+ pci_read_config_dword(dev, 0x44, &val);
+ force_hpet_address = val & 0xfffffffe;
+ force_hpet_resume_type = NVIDIA_FORCE_HPET_RESUME;
+- printk(KERN_DEBUG "Force enabled HPET at base address 0x%lx\n",
++ dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
+ force_hpet_address);
+ cached_dev = dev;
+ return;
+@@ -353,6 +361,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_N
+ nvidia_force_enable_hpet);
+
+ /* LPC bridges */
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0260,
++ nvidia_force_enable_hpet);
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0360,
+ nvidia_force_enable_hpet);
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, 0x0361,
+@@ -373,19 +383,19 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_N
+ void force_hpet_resume(void)
+ {
+ switch (force_hpet_resume_type) {
+- case ICH_FORCE_HPET_RESUME:
+- return ich_force_hpet_resume();
+-
+- case OLD_ICH_FORCE_HPET_RESUME:
+- return old_ich_force_hpet_resume();
+-
+- case VT8237_FORCE_HPET_RESUME:
+- return vt8237_force_hpet_resume();
+-
+- case NVIDIA_FORCE_HPET_RESUME:
+- return nvidia_force_hpet_resume();
+-
+- default:
++ case ICH_FORCE_HPET_RESUME:
++ ich_force_hpet_resume();
++ return;
++ case OLD_ICH_FORCE_HPET_RESUME:
++ old_ich_force_hpet_resume();
++ return;
++ case VT8237_FORCE_HPET_RESUME:
++ vt8237_force_hpet_resume();
++ return;
++ case NVIDIA_FORCE_HPET_RESUME:
++ nvidia_force_hpet_resume();
++ return;
++ default:
+ break;
+ }
+ }
+--- a/arch/x86/kernel/rtc.c
++++ b/arch/x86/kernel/rtc.c
+@@ -181,6 +181,10 @@ unsigned long read_persistent_clock(void
+ {
+ unsigned long retval, flags;
+
++#ifdef CONFIG_XEN
++ if (!is_initial_xendomain())
++ return xen_read_persistent_clock();
++#endif
+ spin_lock_irqsave(&rtc_lock, flags);
+ retval = get_wallclock();
+ spin_unlock_irqrestore(&rtc_lock, flags);
+@@ -190,6 +194,10 @@ unsigned long read_persistent_clock(void
+
+ int update_persistent_clock(struct timespec now)
+ {
++#ifdef CONFIG_XEN
++ if (xen_update_persistent_clock() < 0 || xen_independent_wallclock())
++ return 0;
++#endif
+ return set_rtc_mmss(now.tv_sec);
+ }
+
+--- a/arch/x86/kernel/setup_32-xen.c
++++ b/arch/x86/kernel/setup_32-xen.c
+@@ -47,9 +47,12 @@
+ #include <linux/crash_dump.h>
+ #include <linux/dmi.h>
+ #include <linux/pfn.h>
++#include <linux/pci.h>
++#include <linux/init_ohci1394_dma.h>
+
+ #include <video/edid.h>
+
++#include <asm/mtrr.h>
+ #include <asm/apic.h>
+ #include <asm/e820.h>
+ #include <asm/mpspec.h>
+@@ -79,14 +82,83 @@ static struct notifier_block xen_panic_b
+ xen_panic_event, NULL, 0 /* try to go last */
+ };
+
+-int disable_pse __cpuinitdata = 0;
+-
+ /*
+ * Machine setup..
+ */
+-extern struct resource code_resource;
+-extern struct resource data_resource;
+-extern struct resource bss_resource;
++static struct resource data_resource = {
++ .name = "Kernel data",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource code_resource = {
++ .name = "Kernel code",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource bss_resource = {
++ .name = "Kernel bss",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource video_ram_resource = {
++ .name = "Video RAM area",
++ .start = 0xa0000,
++ .end = 0xbffff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource standard_io_resources[] = { {
++ .name = "dma1",
++ .start = 0x0000,
++ .end = 0x001f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "pic1",
++ .start = 0x0020,
++ .end = 0x0021,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "timer0",
++ .start = 0x0040,
++ .end = 0x0043,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "timer1",
++ .start = 0x0050,
++ .end = 0x0053,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "keyboard",
++ .start = 0x0060,
++ .end = 0x006f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "dma page reg",
++ .start = 0x0080,
++ .end = 0x008f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "pic2",
++ .start = 0x00a0,
++ .end = 0x00a1,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "dma2",
++ .start = 0x00c0,
++ .end = 0x00df,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "fpu",
++ .start = 0x00f0,
++ .end = 0x00ff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++} };
+
+ /* cpu data as detected by the assembly code in head.S */
+ struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
+@@ -94,13 +166,16 @@ struct cpuinfo_x86 new_cpu_data __cpuini
+ struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
+ EXPORT_SYMBOL(boot_cpu_data);
+
++#ifndef CONFIG_X86_PAE
+ unsigned long mmu_cr4_features;
++#else
++unsigned long mmu_cr4_features = X86_CR4_PAE;
++#endif
+
+ /* for MCA, but anyone else can use it if they want */
+ unsigned int machine_id;
+ unsigned int machine_submodel_id;
+ unsigned int BIOS_revision;
+-unsigned int mca_pentium_flag;
+
+ /* Boot loader ID as an integer, for the benefit of proc_dointvec */
+ int bootloader_type;
+@@ -131,13 +206,17 @@ extern int root_mountflags;
+
+ unsigned long saved_videomode;
+
+-#define RAMDISK_IMAGE_START_MASK 0x07FF
++#define RAMDISK_IMAGE_START_MASK 0x07FF
+ #define RAMDISK_PROMPT_FLAG 0x8000
+-#define RAMDISK_LOAD_FLAG 0x4000
++#define RAMDISK_LOAD_FLAG 0x4000
+
+ static char __initdata command_line[COMMAND_LINE_SIZE];
+
++#ifndef CONFIG_DEBUG_BOOT_PARAMS
+ struct boot_params __initdata boot_params;
++#else
++struct boot_params boot_params;
++#endif
+
+ /*
+ * Point at the empty zero page to start with. We map the real shared_info
+@@ -198,8 +277,7 @@ static int __init parse_mem(char *arg)
+ return -EINVAL;
+
+ if (strcmp(arg, "nopentium") == 0) {
+- clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
+- disable_pse = 1;
++ setup_clear_cpu_cap(X86_FEATURE_PSE);
+ } else {
+ /* If the user specifies memory size, we
+ * limit the BIOS-provided memory map to
+@@ -208,7 +286,7 @@ static int __init parse_mem(char *arg)
+ * trim the existing memory map.
+ */
+ unsigned long long mem_size;
+-
++
+ mem_size = memparse(arg, &arg);
+ limit_regions(mem_size);
+ user_defined_memmap = 1;
+@@ -350,7 +428,7 @@ static void __init reserve_ebda_region(v
+ unsigned int addr;
+ addr = get_bios_ebda();
+ if (addr)
+- reserve_bootmem(addr, PAGE_SIZE);
++ reserve_bootmem(addr, PAGE_SIZE, BOOTMEM_DEFAULT);
+ }
+ #endif
+
+@@ -365,8 +443,6 @@ static unsigned long __init setup_memory
+ min_low_pfn = PFN_UP(__pa(xen_start_info->pt_base)) +
+ xen_start_info->nr_pt_frames;
+
+- find_max_pfn();
+-
+ max_low_pfn = find_max_low_pfn();
+
+ #ifdef CONFIG_HIGHMEM
+@@ -447,7 +523,8 @@ static void __init reserve_crashkernel(v
+ (unsigned long)(total_mem >> 20));
+ crashk_res.start = crash_base;
+ crashk_res.end = crash_base + crash_size - 1;
+- reserve_bootmem(crash_base, crash_size);
++ reserve_bootmem(crash_base, crash_size,
++ BOOTMEM_DEFAULT);
+ } else
+ printk(KERN_INFO "crashkernel reservation failed - "
+ "you have to specify a base address\n");
+@@ -461,6 +538,99 @@ static inline void __init reserve_crashk
+ {}
+ #endif
+
++#ifdef CONFIG_BLK_DEV_INITRD
++
++static bool do_relocate_initrd = false;
++
++static void __init reserve_initrd(void)
++{
++ unsigned long ramdisk_image = __pa(xen_start_info->mod_start);
++ unsigned long ramdisk_size = xen_start_info->mod_len;
++ unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
++ unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
++ unsigned long ramdisk_here;
++
++ initrd_start = 0;
++
++ if (!xen_start_info->mod_start || !ramdisk_size)
++ return; /* No initrd provided by bootloader */
++
++ if (ramdisk_end < ramdisk_image) {
++ printk(KERN_ERR "initrd wraps around end of memory, "
++ "disabling initrd\n");
++ return;
++ }
++ if (ramdisk_size >= end_of_lowmem/2) {
++ printk(KERN_ERR "initrd too large to handle, "
++ "disabling initrd\n");
++ return;
++ }
++ if (ramdisk_end <= end_of_lowmem) {
++ /* All in lowmem, easy case */
++ reserve_bootmem(ramdisk_image, ramdisk_size, BOOTMEM_DEFAULT);
++ initrd_start = ramdisk_image + PAGE_OFFSET;
++ initrd_end = initrd_start+ramdisk_size;
++ return;
++ }
++
++ /* We need to move the initrd down into lowmem */
++ ramdisk_here = (end_of_lowmem - ramdisk_size) & PAGE_MASK;
++
++ /* Note: this includes all the lowmem currently occupied by
++ the initrd, we rely on that fact to keep the data intact. */
++ reserve_bootmem(ramdisk_here, ramdisk_size, BOOTMEM_DEFAULT);
++ initrd_start = ramdisk_here + PAGE_OFFSET;
++ initrd_end = initrd_start + ramdisk_size;
++
++ do_relocate_initrd = true;
++}
++
++#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
++
++static void __init relocate_initrd(void)
++{
++ unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
++ unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
++ unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
++ unsigned long ramdisk_here;
++ unsigned long slop, clen, mapaddr;
++ char *p, *q;
++
++ if (!do_relocate_initrd)
++ return;
++
++ ramdisk_here = initrd_start - PAGE_OFFSET;
++
++ q = (char *)initrd_start;
++
++ /* Copy any lowmem portion of the initrd */
++ if (ramdisk_image < end_of_lowmem) {
++ clen = end_of_lowmem - ramdisk_image;
++ p = (char *)__va(ramdisk_image);
++ memcpy(q, p, clen);
++ q += clen;
++ ramdisk_image += clen;
++ ramdisk_size -= clen;
++ }
++
++ /* Copy the highmem portion of the initrd */
++ while (ramdisk_size) {
++ slop = ramdisk_image & ~PAGE_MASK;
++ clen = ramdisk_size;
++ if (clen > MAX_MAP_CHUNK-slop)
++ clen = MAX_MAP_CHUNK-slop;
++ mapaddr = ramdisk_image & PAGE_MASK;
++ p = early_ioremap(mapaddr, clen+slop);
++ memcpy(q, p+slop, clen);
++ early_iounmap(p, clen+slop);
++ q += clen;
++ ramdisk_image += clen;
++ ramdisk_size -= clen;
++ }
++}
++
++#endif /* CONFIG_BLK_DEV_INITRD */
++
+ void __init setup_bootmem_allocator(void)
+ {
+ unsigned long bootmap_size;
+@@ -478,14 +648,15 @@ void __init setup_bootmem_allocator(void
+ * bootmem allocator with an invalid RAM area.
+ */
+ reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
+- bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
++ bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text),
++ BOOTMEM_DEFAULT);
+
+ #ifndef CONFIG_XEN
+ /*
+ * reserve physical page 0 - it's a special BIOS page on many boxes,
+ * enabling clean reboots, SMP operation, laptop functions.
+ */
+- reserve_bootmem(0, PAGE_SIZE);
++ reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT);
+
+ /* reserve EBDA region, it's a 4K region */
+ reserve_ebda_region();
+@@ -495,7 +666,7 @@ void __init setup_bootmem_allocator(void
+ unless you have no PS/2 mouse plugged in. */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
+ boot_cpu_data.x86 == 6)
+- reserve_bootmem(0xa0000 - 4096, 4096);
++ reserve_bootmem(0xa0000 - 4096, 4096, BOOTMEM_DEFAULT);
+
+ #ifdef CONFIG_SMP
+ /*
+@@ -503,7 +674,7 @@ void __init setup_bootmem_allocator(void
+ * FIXME: Don't need the extra page at 4K, but need to fix
+ * trampoline before removing it. (see the GDT stuff)
+ */
+- reserve_bootmem(PAGE_SIZE, PAGE_SIZE);
++ reserve_bootmem(PAGE_SIZE, PAGE_SIZE, BOOTMEM_DEFAULT);
+ #endif
+ #ifdef CONFIG_ACPI_SLEEP
+ /*
+@@ -511,29 +682,12 @@ void __init setup_bootmem_allocator(void
+ */
+ acpi_reserve_bootmem();
+ #endif
+- numa_kva_reserve();
+ #endif /* !CONFIG_XEN */
+
+ #ifdef CONFIG_BLK_DEV_INITRD
+- if (xen_start_info->mod_start) {
+- unsigned long ramdisk_image = __pa(xen_start_info->mod_start);
+- unsigned long ramdisk_size = xen_start_info->mod_len;
+- unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
+- unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
+-
+- if (ramdisk_end <= end_of_lowmem) {
+- /*reserve_bootmem(ramdisk_image, ramdisk_size);*/
+- initrd_start = ramdisk_image + PAGE_OFFSET;
+- initrd_end = initrd_start+ramdisk_size;
+- initrd_below_start_ok = 1;
+- } else {
+- printk(KERN_ERR "initrd extends beyond end of memory "
+- "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+- ramdisk_end, end_of_lowmem);
+- initrd_start = 0;
+- }
+- }
++ reserve_initrd();
+ #endif
++ numa_kva_reserve();
+ reserve_crashkernel();
+ }
+
+@@ -600,20 +754,14 @@ void __init setup_arch(char **cmdline_p)
+ memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
+ pre_setup_arch_hook();
+ early_cpu_init();
++ early_ioremap_init();
+ #ifdef CONFIG_SMP
+ prefill_possible_map();
+ #endif
+
+- /*
+- * FIXME: This isn't an official loader_type right
+- * now but does currently work with elilo.
+- * If we were configured as an EFI kernel, check to make
+- * sure that we were loaded correctly from elilo and that
+- * the system table is valid. If not, then initialize normally.
+- */
+ #ifdef CONFIG_EFI
+- if ((boot_params.hdr.type_of_loader == 0x50) &&
+- boot_params.efi_info.efi_systab)
++ if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
++ "EL32", 4))
+ efi_enabled = 1;
+ #endif
+
+@@ -653,12 +801,9 @@ void __init setup_arch(char **cmdline_p)
+ #endif
+
+ ARCH_SETUP
+- if (efi_enabled)
+- efi_init();
+- else {
+- printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+- print_memory_map(memory_setup());
+- }
++
++ printk(KERN_INFO "BIOS-provided physical RAM map:\n");
++ print_memory_map(memory_setup());
+
+ copy_edd();
+
+@@ -691,6 +836,17 @@ void __init setup_arch(char **cmdline_p)
+ strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+ *cmdline_p = command_line;
+
++ if (efi_enabled)
++ efi_init();
++
++ /* update e820 for memory not covered by WB MTRRs */
++ find_max_pfn();
++ mtrr_bp_init();
++#ifndef CONFIG_XEN
++ if (mtrr_trim_uncached_memory(max_pfn))
++ find_max_pfn();
++#endif
++
+ max_low_pfn = setup_memory();
+
+ #ifdef CONFIG_VMI
+@@ -715,6 +871,16 @@ void __init setup_arch(char **cmdline_p)
+ smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
+ #endif
+ paging_init();
++
++ /*
++ * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
++ */
++
++#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
++ if (init_ohci1394_dma_early)
++ init_ohci1394_dma_on_all_controllers();
++#endif
++
+ remapped_pgdat_init();
+ sparse_init();
+ zone_sizes_init();
+@@ -800,16 +966,20 @@ void __init setup_arch(char **cmdline_p)
+ * NOTE: at this point the bootmem allocator is fully available.
+ */
+
++#ifdef CONFIG_BLK_DEV_INITRD
++ relocate_initrd();
++#endif
++
+ paravirt_post_allocator_init();
+
+ if (is_initial_xendomain())
+ dmi_scan_machine();
+
++ io_delay_init();
++
+ #ifdef CONFIG_X86_GENERICARCH
+ generic_apic_probe();
+-#endif
+- if (efi_enabled)
+- efi_map_memmap();
++#endif
+
+ set_iopl.iopl = 1;
+ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
+@@ -827,7 +997,7 @@ void __init setup_arch(char **cmdline_p)
+ acpi_boot_table_init();
+ #endif
+
+-#if defined(CONFIG_PCI) && !defined(CONFIG_XEN)
++#ifndef CONFIG_XEN
+ early_quirks();
+ #endif
+
+@@ -873,3 +1043,30 @@ xen_panic_event(struct notifier_block *t
+ /* we're never actually going to get here... */
+ return NOTIFY_DONE;
+ }
++
++/*
++ * Request address space for all standard resources
++ *
++ * This is called just before pcibios_init(), which is also a
++ * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
++ */
++static int __init request_standard_resources(void)
++{
++ int i;
++
++ /* Nothing to do if not running in dom0. */
++ if (!is_initial_xendomain())
++ return 0;
++
++ printk(KERN_INFO "Setting up standard PCI resources\n");
++ init_iomem_resources(&code_resource, &data_resource, &bss_resource);
++
++ request_resource(&iomem_resource, &video_ram_resource);
++
++ /* request I/O space for devices used on all i[345]86 PCs */
++ for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
++ request_resource(&ioport_resource, &standard_io_resources[i]);
++ return 0;
++}
++
++subsys_initcall(request_standard_resources);
+--- a/arch/x86/kernel/setup_64-xen.c
++++ b/arch/x86/kernel/setup_64-xen.c
+@@ -15,7 +15,6 @@
+ #include <linux/ptrace.h>
+ #include <linux/slab.h>
+ #include <linux/user.h>
+-#include <linux/a.out.h>
+ #include <linux/screen_info.h>
+ #include <linux/ioport.h>
+ #include <linux/delay.h>
+@@ -30,6 +29,7 @@
+ #include <linux/crash_dump.h>
+ #include <linux/root_dev.h>
+ #include <linux/pci.h>
++#include <linux/efi.h>
+ #include <linux/acpi.h>
+ #include <linux/kallsyms.h>
+ #include <linux/edd.h>
+@@ -39,10 +39,13 @@
+ #include <linux/dmi.h>
+ #include <linux/dma-mapping.h>
+ #include <linux/ctype.h>
++#include <linux/uaccess.h>
++#include <linux/init_ohci1394_dma.h>
+
+ #include <asm/mtrr.h>
+ #include <asm/uaccess.h>
+ #include <asm/system.h>
++#include <asm/vsyscall.h>
+ #include <asm/io.h>
+ #include <asm/smp.h>
+ #include <asm/msr.h>
+@@ -50,6 +53,7 @@
+ #include <video/edid.h>
+ #include <asm/e820.h>
+ #include <asm/dma.h>
++#include <asm/gart.h>
+ #include <asm/mpspec.h>
+ #include <asm/mmu_context.h>
+ #include <asm/proto.h>
+@@ -59,6 +63,9 @@
+ #include <asm/sections.h>
+ #include <asm/dmi.h>
+ #include <asm/cacheflush.h>
++#include <asm/mce.h>
++#include <asm/ds.h>
++#include <asm/topology.h>
+ #ifdef CONFIG_XEN
+ #include <linux/percpu.h>
+ #include <xen/interface/physdev.h>
+@@ -108,6 +115,8 @@ EXPORT_SYMBOL(xen_start_info);
+ struct cpuinfo_x86 boot_cpu_data __read_mostly;
+ EXPORT_SYMBOL(boot_cpu_data);
+
++__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
++
+ unsigned long mmu_cr4_features;
+
+ /* Boot loader ID as an integer, for the benefit of proc_dointvec */
+@@ -117,7 +126,7 @@ unsigned long saved_video_mode;
+
+ int force_mwait __cpuinitdata;
+
+-/*
++/*
+ * Early DMI memory
+ */
+ int dmi_alloc_index;
+@@ -163,25 +172,27 @@ struct resource standard_io_resources[]
+
+ #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
+
+-struct resource data_resource = {
++static struct resource data_resource = {
+ .name = "Kernel data",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_RAM,
+ };
+-struct resource code_resource = {
++static struct resource code_resource = {
+ .name = "Kernel code",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_RAM,
+ };
+-struct resource bss_resource = {
++static struct resource bss_resource = {
+ .name = "Kernel bss",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_RAM,
+ };
+
++static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
++
+ #ifdef CONFIG_PROC_VMCORE
+ /* elfcorehdr= specifies the location of elf core header
+ * stored by the crashed kernel. This option will be passed
+@@ -205,9 +216,10 @@ contig_initmem_init(unsigned long start_
+ unsigned long bootmap_size, bootmap;
+
+ bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
+- bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
++ bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
++ PAGE_SIZE);
+ if (bootmap == -1L)
+- panic("Cannot find bootmem map of size %ld\n",bootmap_size);
++ panic("Cannot find bootmem map of size %ld\n", bootmap_size);
+ bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
+ e820_register_active_regions(0, start_pfn, end_pfn);
+ #ifdef CONFIG_XEN
+@@ -215,8 +227,8 @@ contig_initmem_init(unsigned long start_
+ #else
+ free_bootmem_with_active_regions(0, end_pfn);
+ #endif
+- reserve_bootmem(bootmap, bootmap_size);
+-}
++ reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
++}
+ #endif
+
+ #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
+@@ -249,27 +261,35 @@ static inline void copy_edd(void)
+ #ifndef CONFIG_XEN
+ static void __init reserve_crashkernel(void)
+ {
+- unsigned long long free_mem;
++ unsigned long long total_mem;
+ unsigned long long crash_size, crash_base;
+ int ret;
+
+- free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
++ total_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
+
+- ret = parse_crashkernel(boot_command_line, free_mem,
++ ret = parse_crashkernel(boot_command_line, total_mem,
+ &crash_size, &crash_base);
+ if (ret == 0 && crash_size) {
+- if (crash_base > 0) {
+- printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
+- "for crashkernel (System RAM: %ldMB)\n",
+- (unsigned long)(crash_size >> 20),
+- (unsigned long)(crash_base >> 20),
+- (unsigned long)(free_mem >> 20));
+- crashk_res.start = crash_base;
+- crashk_res.end = crash_base + crash_size - 1;
+- reserve_bootmem(crash_base, crash_size);
+- } else
++ if (crash_base <= 0) {
+ printk(KERN_INFO "crashkernel reservation failed - "
+ "you have to specify a base address\n");
++ return;
++ }
++
++ if (reserve_bootmem(crash_base, crash_size,
++ BOOTMEM_EXCLUSIVE) < 0) {
++ printk(KERN_INFO "crashkernel reservation failed - "
++ "memory is in use\n");
++ return;
++ }
++
++ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
++ "for crashkernel (System RAM: %ldMB)\n",
++ (unsigned long)(crash_size >> 20),
++ (unsigned long)(crash_base >> 20),
++ (unsigned long)(total_mem >> 20));
++ crashk_res.start = crash_base;
++ crashk_res.end = crash_base + crash_size - 1;
+ }
+ }
+ #else
+@@ -280,37 +300,21 @@ static inline void __init reserve_crashk
+ {}
+ #endif
+
+-#ifndef CONFIG_XEN
+-#define EBDA_ADDR_POINTER 0x40E
+-
+-unsigned __initdata ebda_addr;
+-unsigned __initdata ebda_size;
+-
+-static void discover_ebda(void)
++/* Overridden in paravirt.c if CONFIG_PARAVIRT */
++void __attribute__((weak)) __init memory_setup(void)
+ {
+- /*
+- * there is a real-mode segmented pointer pointing to the
+- * 4K EBDA area at 0x40E
+- */
+- ebda_addr = *(unsigned short *)__va(EBDA_ADDR_POINTER);
+- ebda_addr <<= 4;
+-
+- ebda_size = *(unsigned short *)__va(ebda_addr);
+-
+- /* Round EBDA up to pages */
+- if (ebda_size == 0)
+- ebda_size = 1;
+- ebda_size <<= 10;
+- ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
+- if (ebda_size > 64*1024)
+- ebda_size = 64*1024;
++ machine_specific_memory_setup();
+ }
+-#else
+-#define discover_ebda() ((void)0)
+-#endif
+
++/*
++ * setup_arch - architecture-specific boot-time initializations
++ *
++ * Note: On x86_64, fixmaps are ready for use even before this is called.
++ */
+ void __init setup_arch(char **cmdline_p)
+ {
++ unsigned i;
++
+ #ifdef CONFIG_XEN
+ extern struct e820map machine_e820;
+
+@@ -319,6 +323,11 @@ void __init setup_arch(char **cmdline_p)
+ /* Register a call for panic conditions. */
+ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+
++ WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
++ VMASST_TYPE_writable_pagetables));
++
++ early_ioremap_init();
++
+ ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
+ screen_info = boot_params.screen_info;
+
+@@ -335,11 +344,6 @@ void __init setup_arch(char **cmdline_p)
+ screen_info.orig_video_isVGA = 0;
+
+ copy_edid();
+-
+- WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
+- VMASST_TYPE_writable_pagetables));
+-
+- ARCH_SETUP
+ #else
+ printk(KERN_INFO "Command line: %s\n", boot_command_line);
+
+@@ -355,7 +359,15 @@ void __init setup_arch(char **cmdline_p)
+ rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
+ rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
+ #endif
+- setup_memory_region();
++#ifdef CONFIG_EFI
++ if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
++ "EL64", 4))
++ efi_enabled = 1;
++#endif
++
++ ARCH_SETUP
++
++ memory_setup();
+ copy_edd();
+
+ if (!boot_params.hdr.root_flags)
+@@ -379,28 +391,51 @@ void __init setup_arch(char **cmdline_p)
+
+ parse_early_param();
+
++#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
++ if (init_ohci1394_dma_early)
++ init_ohci1394_dma_on_all_controllers();
++#endif
++
+ finish_e820_parsing();
+
++ early_gart_iommu_check();
++
+ e820_register_active_regions(0, 0, -1UL);
+ /*
+ * partially used pages are not usable - thus
+ * we are rounding upwards:
+ */
+ end_pfn = e820_end_of_ram();
++ /* update e820 for memory not covered by WB MTRRs */
++ mtrr_bp_init();
++#ifndef CONFIG_XEN
++ if (mtrr_trim_uncached_memory(end_pfn)) {
++ e820_register_active_regions(0, 0, -1UL);
++ end_pfn = e820_end_of_ram();
++ }
++#endif
++
+ num_physpages = end_pfn;
++ max_mapnr = end_pfn;
+
+ check_efer();
+
+- discover_ebda();
+-
+ init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
++ if (efi_enabled)
++ efi_init();
+
+ if (is_initial_xendomain())
+ dmi_scan_machine();
+
++ io_delay_init();
++
+ #if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
+- /* setup to use the static apicid table during kernel startup */
+- x86_cpu_to_apicid_ptr = (void *)&x86_cpu_to_apicid_init;
++ /* setup to use the early static init tables during kernel startup */
++ x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
++ x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init;
++#ifdef CONFIG_NUMA
++ x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init;
++#endif
+ #endif
+
+ /* How many end-of-memory variables you have, grandma! */
+@@ -419,54 +454,25 @@ void __init setup_arch(char **cmdline_p)
+ #endif
+
+ #ifdef CONFIG_NUMA
+- numa_initmem_init(0, end_pfn);
++ numa_initmem_init(0, end_pfn);
+ #else
+ contig_initmem_init(0, end_pfn);
+ #endif
+
+-#ifdef CONFIG_XEN
+- /*
+- * Reserve kernel, physmap, start info, initial page tables, and
+- * direct mapping.
+- */
+- reserve_bootmem_generic(__pa_symbol(&_text),
+- (table_end << PAGE_SHIFT) - __pa_symbol(&_text));
+-#else
+- /* Reserve direct mapping */
+- reserve_bootmem_generic(table_start << PAGE_SHIFT,
+- (table_end - table_start) << PAGE_SHIFT);
+-
+- /* reserve kernel */
+- reserve_bootmem_generic(__pa_symbol(&_text),
+- __pa_symbol(&_end) - __pa_symbol(&_text));
++ early_res_to_bootmem();
+
++#ifndef CONFIG_XEN
++#ifdef CONFIG_ACPI_SLEEP
+ /*
+- * reserve physical page 0 - it's a special BIOS page on many boxes,
+- * enabling clean reboots, SMP operation, laptop functions.
++ * Reserve low memory region for sleep support.
+ */
+- reserve_bootmem_generic(0, PAGE_SIZE);
+-
+- /* reserve ebda region */
+- if (ebda_addr)
+- reserve_bootmem_generic(ebda_addr, ebda_size);
+-#ifdef CONFIG_NUMA
+- /* reserve nodemap region */
+- if (nodemap_addr)
+- reserve_bootmem_generic(nodemap_addr, nodemap_size);
++ acpi_reserve_bootmem();
+ #endif
+
+-#ifdef CONFIG_SMP
+- /* Reserve SMP trampoline */
+- reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, 2*PAGE_SIZE);
+-#endif
++ if (efi_enabled)
++ efi_reserve_bootmem();
+ #endif
+
+-#ifdef CONFIG_ACPI_SLEEP
+- /*
+- * Reserve low memory region for sleep support.
+- */
+- acpi_reserve_bootmem();
+-#endif
+ #ifdef CONFIG_BLK_DEV_INITRD
+ #ifdef CONFIG_XEN
+ if (xen_start_info->mod_start) {
+@@ -490,6 +496,8 @@ void __init setup_arch(char **cmdline_p)
+ initrd_below_start_ok = 1;
+ #endif
+ } else {
++ /* Assumes everything on node 0 */
++ free_bootmem(ramdisk_image, ramdisk_size);
+ printk(KERN_ERR "initrd extends beyond end of memory "
+ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+ ramdisk_end, end_of_mem);
+@@ -499,10 +507,11 @@ void __init setup_arch(char **cmdline_p)
+ #endif
+ reserve_crashkernel();
+ paging_init();
++ map_vsyscall();
+ #ifdef CONFIG_X86_LOCAL_APIC
+ /*
+- * Find and reserve possible boot-time SMP configuration:
+- */
++ * Find and reserve possible boot-time SMP configuration:
++ */
+ find_smp_config();
+ #endif
+ #ifdef CONFIG_XEN
+@@ -590,16 +599,10 @@ void __init setup_arch(char **cmdline_p)
+ #endif
+ #endif
+
+-#if defined(CONFIG_PCI) && !defined(CONFIG_XEN)
++#ifndef CONFIG_XEN
+ early_quirks();
+ #endif
+
+- /*
+- * set this early, so we dont allocate cpu0
+- * if MADT list doesnt list BSP first
+- * mpparse.c/MP_processor_info() allocates logical cpu numbers.
+- */
+- cpu_set(0, cpu_present_map);
+ #ifdef CONFIG_ACPI
+ /*
+ * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
+@@ -623,6 +626,7 @@ void __init setup_arch(char **cmdline_p)
+ get_smp_config();
+ #ifndef CONFIG_XEN
+ init_apic_mappings();
++ ioapic_init_mappings();
+ #endif
+ #endif
+ #if defined(CONFIG_XEN) && defined(CONFIG_SMP) && !defined(CONFIG_HOTPLUG_CPU)
+@@ -634,18 +638,17 @@ void __init setup_arch(char **cmdline_p)
+ */
+ #ifdef CONFIG_XEN
+ if (is_initial_xendomain())
+- e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
++ e820_reserve_resources(machine_e820.map, machine_e820.nr_map,
++ &code_resource, &data_resource, &bss_resource);
+ #else
+- e820_reserve_resources(e820.map, e820.nr_map);
++ e820_reserve_resources(e820.map, e820.nr_map,
++ &code_resource, &data_resource, &bss_resource);
+ e820_mark_nosave_regions();
+ #endif
+
+- {
+- unsigned i;
+ /* request I/O space for devices used on all i[345]86 PCs */
+ for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+ request_resource(&ioport_resource, &standard_io_resources[i]);
+- }
+
+ #ifdef CONFIG_XEN
+ if (is_initial_xendomain())
+@@ -679,7 +682,8 @@ void __init setup_arch(char **cmdline_p)
+
+ #ifdef CONFIG_VT
+ #if defined(CONFIG_VGA_CONSOLE)
+- conswitchp = &vga_con;
++ if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
++ conswitchp = &vga_con;
+ #elif defined(CONFIG_DUMMY_CONSOLE)
+ conswitchp = &dummy_con;
+ #endif
+@@ -723,9 +727,10 @@ static void __cpuinit display_cacheinfo(
+
+ if (n >= 0x80000005) {
+ cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
+- printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
+- edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
+- c->x86_cache_size=(ecx>>24)+(edx>>24);
++ printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), "
++ "D cache %dK (%d bytes/line)\n",
++ edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
++ c->x86_cache_size = (ecx>>24) + (edx>>24);
+ /* On K8 L1 TLB is inclusive, so don't count it */
+ c->x86_tlbsize = 0;
+ }
+@@ -739,27 +744,25 @@ static void __cpuinit display_cacheinfo(
+ printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
+ c->x86_cache_size, ecx & 0xFF);
+ }
+-
+- if (n >= 0x80000007)
+- cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
+ if (n >= 0x80000008) {
+- cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
++ cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
+ c->x86_virt_bits = (eax >> 8) & 0xff;
+ c->x86_phys_bits = eax & 0xff;
+ }
+ }
+
+ #ifdef CONFIG_NUMA
+-static int nearby_node(int apicid)
++static int __cpuinit nearby_node(int apicid)
+ {
+- int i;
++ int i, node;
++
+ for (i = apicid - 1; i >= 0; i--) {
+- int node = apicid_to_node[i];
++ node = apicid_to_node[i];
+ if (node != NUMA_NO_NODE && node_online(node))
+ return node;
+ }
+ for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
+- int node = apicid_to_node[i];
++ node = apicid_to_node[i];
+ if (node != NUMA_NO_NODE && node_online(node))
+ return node;
+ }
+@@ -771,7 +774,7 @@ static int nearby_node(int apicid)
+ * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
+ * Assumes number of cores is a power of two.
+ */
+-static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
++static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c)
+ {
+ #ifdef CONFIG_SMP
+ unsigned bits;
+@@ -780,7 +783,54 @@ static void __init amd_detect_cmp(struct
+ int node = 0;
+ unsigned apicid = hard_smp_processor_id();
+ #endif
+- unsigned ecx = cpuid_ecx(0x80000008);
++ bits = c->x86_coreid_bits;
++
++ /* Low order bits define the core id (index of core in socket) */
++ c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
++ /* Convert the APIC ID into the socket ID */
++ c->phys_proc_id = phys_pkg_id(bits);
++
++#ifdef CONFIG_NUMA
++ node = c->phys_proc_id;
++ if (apicid_to_node[apicid] != NUMA_NO_NODE)
++ node = apicid_to_node[apicid];
++ if (!node_online(node)) {
++ /* Two possibilities here:
++ - The CPU is missing memory and no node was created.
++ In that case try picking one from a nearby CPU
++ - The APIC IDs differ from the HyperTransport node IDs
++ which the K8 northbridge parsing fills in.
++ Assume they are all increased by a constant offset,
++ but in the same order as the HT nodeids.
++ If that doesn't result in a usable node fall back to the
++ path for the previous case. */
++
++ int ht_nodeid = apicid - (cpu_data(0).phys_proc_id << bits);
++
++ if (ht_nodeid >= 0 &&
++ apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
++ node = apicid_to_node[ht_nodeid];
++ /* Pick a nearby node */
++ if (!node_online(node))
++ node = nearby_node(apicid);
++ }
++ numa_set_node(cpu, node);
++
++ printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
++#endif
++#endif
++}
++
++static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c)
++{
++#ifdef CONFIG_SMP
++ unsigned bits, ecx;
++
++ /* Multi core CPU? */
++ if (c->extended_cpuid_level < 0x80000008)
++ return;
++
++ ecx = cpuid_ecx(0x80000008);
+
+ c->x86_max_cores = (ecx & 0xff) + 1;
+
+@@ -793,37 +843,8 @@ static void __init amd_detect_cmp(struct
+ bits++;
+ }
+
+- /* Low order bits define the core id (index of core in socket) */
+- c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
+- /* Convert the APIC ID into the socket ID */
+- c->phys_proc_id = phys_pkg_id(bits);
+-
+-#ifdef CONFIG_NUMA
+- node = c->phys_proc_id;
+- if (apicid_to_node[apicid] != NUMA_NO_NODE)
+- node = apicid_to_node[apicid];
+- if (!node_online(node)) {
+- /* Two possibilities here:
+- - The CPU is missing memory and no node was created.
+- In that case try picking one from a nearby CPU
+- - The APIC IDs differ from the HyperTransport node IDs
+- which the K8 northbridge parsing fills in.
+- Assume they are all increased by a constant offset,
+- but in the same order as the HT nodeids.
+- If that doesn't result in a usable node fall back to the
+- path for the previous case. */
+- int ht_nodeid = apicid - (cpu_data(0).phys_proc_id << bits);
+- if (ht_nodeid >= 0 &&
+- apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
+- node = apicid_to_node[ht_nodeid];
+- /* Pick a nearby node */
+- if (!node_online(node))
+- node = nearby_node(apicid);
+- }
+- numa_set_node(cpu, node);
++ c->x86_coreid_bits = bits;
+
+- printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
+-#endif
+ #endif
+ }
+
+@@ -840,8 +861,8 @@ static void __init amd_detect_cmp(struct
+ /* AMD systems with C1E don't have a working lAPIC timer. Check for that. */
+ static __cpuinit int amd_apic_timer_broken(void)
+ {
+- u32 lo, hi;
+- u32 eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
++ u32 lo, hi, eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
++
+ switch (eax & CPUID_XFAM) {
+ case CPUID_XFAM_K8:
+ if ((eax & CPUID_XMOD) < CPUID_XMOD_REV_F)
+@@ -860,6 +881,15 @@ static __cpuinit int amd_apic_timer_brok
+ }
+ #endif
+
++static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
++{
++ early_init_amd_mc(c);
++
++ /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
++ if (c->x86_power & (1<<8))
++ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
++}
++
+ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
+ {
+ unsigned level;
+@@ -870,7 +900,7 @@ static void __cpuinit init_amd(struct cp
+ /*
+ * Disable TLB flush filter by setting HWCR.FFDIS on K8
+ * bit 6 of msr C001_0015
+- *
++ *
+ * Errata 63 for SH-B3 steppings
+ * Errata 122 for all steppings (F+ have it disabled by default)
+ */
+@@ -883,35 +913,32 @@ static void __cpuinit init_amd(struct cp
+
+ /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
+ 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
+- clear_bit(0*32+31, &c->x86_capability);
+-
++ clear_bit(0*32+31, (unsigned long *)&c->x86_capability);
++
+ /* On C+ stepping K8 rep microcode works well for copy/memset */
+ level = cpuid_eax(1);
+- if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
+- set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
++ if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) ||
++ level >= 0x0f58))
++ set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+ if (c->x86 == 0x10 || c->x86 == 0x11)
+- set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
++ set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+
+ /* Enable workaround for FXSAVE leak */
+ if (c->x86 >= 6)
+- set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);
++ set_cpu_cap(c, X86_FEATURE_FXSAVE_LEAK);
+
+ level = get_model_name(c);
+ if (!level) {
+- switch (c->x86) {
++ switch (c->x86) {
+ case 15:
+ /* Should distinguish Models here, but this is only
+ a fallback anyways. */
+ strcpy(c->x86_model_id, "Hammer");
+- break;
+- }
+- }
++ break;
++ }
++ }
+ display_cacheinfo(c);
+
+- /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
+- if (c->x86_power & (1<<8))
+- set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
+-
+ /* Multi core CPU? */
+ if (c->extended_cpuid_level >= 0x80000008)
+ amd_detect_cmp(c);
+@@ -923,14 +950,10 @@ static void __cpuinit init_amd(struct cp
+ num_cache_leaves = 3;
+
+ if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11)
+- set_bit(X86_FEATURE_K8, &c->x86_capability);
+-
+- /* RDTSC can be speculated around */
+- clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
++ set_cpu_cap(c, X86_FEATURE_K8);
+
+- /* Family 10 doesn't support C states in MWAIT so don't use it */
+- if (c->x86 == 0x10 && !force_mwait)
+- clear_bit(X86_FEATURE_MWAIT, &c->x86_capability);
++ /* MFENCE stops RDTSC speculation */
++ set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC);
+
+ #ifndef CONFIG_XEN
+ if (amd_apic_timer_broken())
+@@ -938,28 +961,29 @@ static void __cpuinit init_amd(struct cp
+ #endif
+ }
+
+-static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
++void __cpuinit detect_ht(struct cpuinfo_x86 *c)
+ {
+ #ifdef CONFIG_SMP
+- u32 eax, ebx, ecx, edx;
+- int index_msb, core_bits;
++ u32 eax, ebx, ecx, edx;
++ int index_msb, core_bits;
+
+ cpuid(1, &eax, &ebx, &ecx, &edx);
+
+
+ if (!cpu_has(c, X86_FEATURE_HT))
+ return;
+- if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
++ if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
+ goto out;
+
+ smp_num_siblings = (ebx & 0xff0000) >> 16;
+
+ if (smp_num_siblings == 1) {
+ printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
+- } else if (smp_num_siblings > 1 ) {
++ } else if (smp_num_siblings > 1) {
+
+ if (smp_num_siblings > NR_CPUS) {
+- printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
++ printk(KERN_WARNING "CPU: Unsupported number of "
++ "siblings %d", smp_num_siblings);
+ smp_num_siblings = 1;
+ return;
+ }
+@@ -969,7 +993,7 @@ static void __cpuinit detect_ht(struct c
+
+ smp_num_siblings = smp_num_siblings / c->x86_max_cores;
+
+- index_msb = get_count_order(smp_num_siblings) ;
++ index_msb = get_count_order(smp_num_siblings);
+
+ core_bits = get_count_order(c->x86_max_cores);
+
+@@ -978,8 +1002,10 @@ static void __cpuinit detect_ht(struct c
+ }
+ out:
+ if ((c->x86_max_cores * smp_num_siblings) > 1) {
+- printk(KERN_INFO "CPU: Physical Processor ID: %d\n", c->phys_proc_id);
+- printk(KERN_INFO "CPU: Processor Core ID: %d\n", c->cpu_core_id);
++ printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
++ c->phys_proc_id);
++ printk(KERN_INFO "CPU: Processor Core ID: %d\n",
++ c->cpu_core_id);
+ }
+
+ #endif
+@@ -1003,7 +1029,7 @@ static int __cpuinit intel_num_cpu_cores
+ return 1;
+ }
+
+-static void srat_detect_node(void)
++static void __cpuinit srat_detect_node(void)
+ {
+ #ifdef CONFIG_NUMA
+ unsigned node;
+@@ -1013,7 +1039,7 @@ static void srat_detect_node(void)
+ /* Don't do the funky fallback heuristics the AMD version employs
+ for now. */
+ node = apicid_to_node[apicid];
+- if (node == NUMA_NO_NODE)
++ if (node == NUMA_NO_NODE || !node_online(node))
+ node = first_node(node_online_map);
+ numa_set_node(cpu, node);
+
+@@ -1021,28 +1047,39 @@ static void srat_detect_node(void)
+ #endif
+ }
+
++static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
++{
++ if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
++ (c->x86 == 0x6 && c->x86_model >= 0x0e))
++ set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
++}
++
+ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
+ {
+ /* Cache sizes */
+ unsigned n;
+
+ init_intel_cacheinfo(c);
+- if (c->cpuid_level > 9 ) {
++ if (c->cpuid_level > 9) {
+ unsigned eax = cpuid_eax(10);
+ /* Check for version and the number of counters */
+ if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
+- set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
++ set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
+ }
+
+ if (cpu_has_ds) {
+ unsigned int l1, l2;
+ rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
+ if (!(l1 & (1<<11)))
+- set_bit(X86_FEATURE_BTS, c->x86_capability);
++ set_cpu_cap(c, X86_FEATURE_BTS);
+ if (!(l1 & (1<<12)))
+- set_bit(X86_FEATURE_PEBS, c->x86_capability);
++ set_cpu_cap(c, X86_FEATURE_PEBS);
+ }
+
++
++ if (cpu_has_bts)
++ ds_init_intel(c);
++
+ n = c->extended_cpuid_level;
+ if (n >= 0x80000008) {
+ unsigned eax = cpuid_eax(0x80000008);
+@@ -1059,14 +1096,11 @@ static void __cpuinit init_intel(struct
+ c->x86_cache_alignment = c->x86_clflush_size * 2;
+ if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
+ (c->x86 == 0x6 && c->x86_model >= 0x0e))
+- set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
++ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ if (c->x86 == 6)
+- set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
+- if (c->x86 == 15)
+- set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
+- else
+- clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
+- c->x86_max_cores = intel_num_cpu_cores(c);
++ set_cpu_cap(c, X86_FEATURE_REP_GOOD);
++ set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
++ c->x86_max_cores = intel_num_cpu_cores(c);
+
+ srat_detect_node();
+ }
+@@ -1083,18 +1117,12 @@ static void __cpuinit get_cpu_vendor(str
+ c->x86_vendor = X86_VENDOR_UNKNOWN;
+ }
+
+-struct cpu_model_info {
+- int vendor;
+- int family;
+- char *model_names[16];
+-};
+-
+ /* Do some early cpuid on the boot CPU to get some parameter that are
+ needed before check_bugs. Everything advanced is in identify_cpu
+ below. */
+-void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
++static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
+ {
+- u32 tfms;
++ u32 tfms, xlvl;
+
+ c->loops_per_jiffy = loops_per_jiffy;
+ c->x86_cache_size = -1;
+@@ -1105,6 +1133,7 @@ void __cpuinit early_identify_cpu(struct
+ c->x86_clflush_size = 64;
+ c->x86_cache_alignment = c->x86_clflush_size;
+ c->x86_max_cores = 1;
++ c->x86_coreid_bits = 0;
+ c->extended_cpuid_level = 0;
+ memset(&c->x86_capability, 0, sizeof c->x86_capability);
+
+@@ -1113,7 +1142,7 @@ void __cpuinit early_identify_cpu(struct
+ (unsigned int *)&c->x86_vendor_id[0],
+ (unsigned int *)&c->x86_vendor_id[8],
+ (unsigned int *)&c->x86_vendor_id[4]);
+-
++
+ get_cpu_vendor(c);
+
+ /* Initialize the standard set of capabilities */
+@@ -1131,7 +1160,7 @@ void __cpuinit early_identify_cpu(struct
+ c->x86 += (tfms >> 20) & 0xff;
+ if (c->x86 >= 0x6)
+ c->x86_model += ((tfms >> 16) & 0xF) << 4;
+- if (c->x86_capability[0] & (1<<19))
++ if (c->x86_capability[0] & (1<<19))
+ c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
+ } else {
+ /* Have CPUID level 0 only - unheard of */
+@@ -1141,18 +1170,6 @@ void __cpuinit early_identify_cpu(struct
+ #ifdef CONFIG_SMP
+ c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
+ #endif
+-}
+-
+-/*
+- * This does the hard work of actually picking apart the CPU stuff...
+- */
+-void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+-{
+- int i;
+- u32 xlvl;
+-
+- early_identify_cpu(c);
+-
+ /* AMD-defined flags: level 0x80000001 */
+ xlvl = cpuid_eax(0x80000000);
+ c->extended_cpuid_level = xlvl;
+@@ -1173,6 +1190,30 @@ void __cpuinit identify_cpu(struct cpuin
+ c->x86_capability[2] = cpuid_edx(0x80860001);
+ }
+
++ c->extended_cpuid_level = cpuid_eax(0x80000000);
++ if (c->extended_cpuid_level >= 0x80000007)
++ c->x86_power = cpuid_edx(0x80000007);
++
++ switch (c->x86_vendor) {
++ case X86_VENDOR_AMD:
++ early_init_amd(c);
++ break;
++ case X86_VENDOR_INTEL:
++ early_init_intel(c);
++ break;
++ }
++
++}
++
++/*
++ * This does the hard work of actually picking apart the CPU stuff...
++ */
++void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
++{
++ int i;
++
++ early_identify_cpu(c);
++
+ init_scattered_cpuid_features(c);
+
+ c->apicid = phys_pkg_id(0);
+@@ -1202,8 +1243,7 @@ void __cpuinit identify_cpu(struct cpuin
+ break;
+ }
+
+- select_idle_routine(c);
+- detect_ht(c);
++ detect_ht(c);
+
+ /*
+ * On SMP, boot_cpu_data holds the common feature set between
+@@ -1213,31 +1253,55 @@ void __cpuinit identify_cpu(struct cpuin
+ */
+ if (c != &boot_cpu_data) {
+ /* AND the already accumulated flags with these */
+- for (i = 0 ; i < NCAPINTS ; i++)
++ for (i = 0; i < NCAPINTS; i++)
+ boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
+ }
+
++ /* Clear all flags overriden by options */
++ for (i = 0; i < NCAPINTS; i++)
++ c->x86_capability[i] &= ~cleared_cpu_caps[i];
++
+ #ifdef CONFIG_X86_MCE
+ mcheck_init(c);
+ #endif
++ select_idle_routine(c);
++
+ if (c != &boot_cpu_data)
+ mtrr_ap_init();
+ #ifdef CONFIG_NUMA
+ numa_add_cpu(smp_processor_id());
+ #endif
++
+ }
+-
++
++static __init int setup_noclflush(char *arg)
++{
++ setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
++ return 1;
++}
++__setup("noclflush", setup_noclflush);
+
+ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
+ {
+ if (c->x86_model_id[0])
+- printk("%s", c->x86_model_id);
++ printk(KERN_CONT "%s", c->x86_model_id);
++
++ if (c->x86_mask || c->cpuid_level >= 0)
++ printk(KERN_CONT " stepping %02x\n", c->x86_mask);
++ else
++ printk(KERN_CONT "\n");
++}
+
+- if (c->x86_mask || c->cpuid_level >= 0)
+- printk(" stepping %02x\n", c->x86_mask);
++static __init int setup_disablecpuid(char *arg)
++{
++ int bit;
++ if (get_option(&arg, &bit) && bit < NCAPINTS*32)
++ setup_clear_cpu_cap(bit);
+ else
+- printk("\n");
++ return 0;
++ return 1;
+ }
++__setup("clearcpuid=", setup_disablecpuid);
+
+ /*
+ * Get CPU information for use by the procfs.
+@@ -1246,116 +1310,41 @@ void __cpuinit print_cpu_info(struct cpu
+ static int show_cpuinfo(struct seq_file *m, void *v)
+ {
+ struct cpuinfo_x86 *c = v;
+- int cpu = 0;
+-
+- /*
+- * These flag bits must match the definitions in <asm/cpufeature.h>.
+- * NULL means this bit is undefined or reserved; either way it doesn't
+- * have meaning as far as Linux is concerned. Note that it's important
+- * to realize there is a difference between this table and CPUID -- if
+- * applications want to get the raw CPUID data, they should access
+- * /dev/cpu/<cpu_nr>/cpuid instead.
+- */
+- static const char *const x86_cap_flags[] = {
+- /* Intel-defined */
+- "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
+- "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
+- "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
+- "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",
+-
+- /* AMD-defined */
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
+- NULL, "fxsr_opt", "pdpe1gb", "rdtscp", NULL, "lm",
+- "3dnowext", "3dnow",
+-
+- /* Transmeta-defined */
+- "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+-
+- /* Other (Linux-defined) */
+- "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
+- NULL, NULL, NULL, NULL,
+- "constant_tsc", "up", NULL, "arch_perfmon",
+- "pebs", "bts", NULL, "sync_rdtsc",
+- "rep_good", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+-
+- /* Intel-defined (#2) */
+- "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
+- "tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
+- NULL, NULL, "dca", "sse4_1", "sse4_2", NULL, NULL, "popcnt",
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+-
+- /* VIA/Cyrix/Centaur-defined */
+- NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
+- "ace2", "ace2_en", "phe", "phe_en", "pmm", "pmm_en", NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+-
+- /* AMD-defined (#2) */
+- "lahf_lm", "cmp_legacy", "svm", "extapic",
+- "cr8_legacy", "abm", "sse4a", "misalignsse",
+- "3dnowprefetch", "osvw", "ibs", "sse5",
+- "skinit", "wdt", NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+-
+- /* Auxiliary (Linux-defined) */
+- "ida", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+- };
+- static const char *const x86_power_flags[] = {
+- "ts", /* temperature sensor */
+- "fid", /* frequency id control */
+- "vid", /* voltage id control */
+- "ttp", /* thermal trip */
+- "tm",
+- "stc",
+- "100mhzsteps",
+- "hwpstate",
+- "", /* tsc invariant mapped to constant_tsc */
+- /* nothing */
+- };
+-
++ int cpu = 0, i;
+
+ #ifdef CONFIG_SMP
+ cpu = c->cpu_index;
+ #endif
+
+- seq_printf(m,"processor\t: %u\n"
+- "vendor_id\t: %s\n"
+- "cpu family\t: %d\n"
+- "model\t\t: %d\n"
+- "model name\t: %s\n",
+- (unsigned)cpu,
+- c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
+- c->x86,
+- (int)c->x86_model,
+- c->x86_model_id[0] ? c->x86_model_id : "unknown");
+-
++ seq_printf(m, "processor\t: %u\n"
++ "vendor_id\t: %s\n"
++ "cpu family\t: %d\n"
++ "model\t\t: %d\n"
++ "model name\t: %s\n",
++ (unsigned)cpu,
++ c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
++ c->x86,
++ (int)c->x86_model,
++ c->x86_model_id[0] ? c->x86_model_id : "unknown");
++
+ if (c->x86_mask || c->cpuid_level >= 0)
+ seq_printf(m, "stepping\t: %d\n", c->x86_mask);
+ else
+ seq_printf(m, "stepping\t: unknown\n");
+-
+- if (cpu_has(c,X86_FEATURE_TSC)) {
++
++ if (cpu_has(c, X86_FEATURE_TSC)) {
+ unsigned int freq = cpufreq_quick_get((unsigned)cpu);
++
+ if (!freq)
+ freq = cpu_khz;
+ seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
+- freq / 1000, (freq % 1000));
++ freq / 1000, (freq % 1000));
+ }
+
+ /* Cache size */
+- if (c->x86_cache_size >= 0)
++ if (c->x86_cache_size >= 0)
+ seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
+-
++
+ #ifdef CONFIG_SMP
+ if (smp_num_siblings * c->x86_max_cores > 1) {
+ seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
+@@ -1364,48 +1353,43 @@ static int show_cpuinfo(struct seq_file
+ seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
+ seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
+ }
+-#endif
++#endif
+
+ seq_printf(m,
+- "fpu\t\t: yes\n"
+- "fpu_exception\t: yes\n"
+- "cpuid level\t: %d\n"
+- "wp\t\t: yes\n"
+- "flags\t\t:",
++ "fpu\t\t: yes\n"
++ "fpu_exception\t: yes\n"
++ "cpuid level\t: %d\n"
++ "wp\t\t: yes\n"
++ "flags\t\t:",
+ c->cpuid_level);
+
+- {
+- int i;
+- for ( i = 0 ; i < 32*NCAPINTS ; i++ )
+- if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
+- seq_printf(m, " %s", x86_cap_flags[i]);
+- }
+-
++ for (i = 0; i < 32*NCAPINTS; i++)
++ if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
++ seq_printf(m, " %s", x86_cap_flags[i]);
++
+ seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
+ c->loops_per_jiffy/(500000/HZ),
+ (c->loops_per_jiffy/(5000/HZ)) % 100);
+
+- if (c->x86_tlbsize > 0)
++ if (c->x86_tlbsize > 0)
+ seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
+ seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
+ seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
+
+- seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
++ seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
+ c->x86_phys_bits, c->x86_virt_bits);
+
+ seq_printf(m, "power management:");
+- {
+- unsigned i;
+- for (i = 0; i < 32; i++)
+- if (c->x86_power & (1 << i)) {
+- if (i < ARRAY_SIZE(x86_power_flags) &&
+- x86_power_flags[i])
+- seq_printf(m, "%s%s",
+- x86_power_flags[i][0]?" ":"",
+- x86_power_flags[i]);
+- else
+- seq_printf(m, " [%d]", i);
+- }
++ for (i = 0; i < 32; i++) {
++ if (c->x86_power & (1 << i)) {
++ if (i < ARRAY_SIZE(x86_power_flags) &&
++ x86_power_flags[i])
++ seq_printf(m, "%s%s",
++ x86_power_flags[i][0]?" ":"",
++ x86_power_flags[i]);
++ else
++ seq_printf(m, " [%d]", i);
++ }
+ }
+
+ seq_printf(m, "\n\n");
+@@ -1432,8 +1416,8 @@ static void c_stop(struct seq_file *m, v
+ {
+ }
+
+-struct seq_operations cpuinfo_op = {
+- .start =c_start,
++const struct seq_operations cpuinfo_op = {
++ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = show_cpuinfo,
+--- a/arch/x86/kernel/setup64-xen.c
++++ b/arch/x86/kernel/setup64-xen.c
+@@ -31,7 +31,11 @@
+ #include <asm/hypervisor.h>
+ #endif
+
++#ifndef CONFIG_DEBUG_BOOT_PARAMS
+ struct boot_params __initdata boot_params;
++#else
++struct boot_params boot_params;
++#endif
+
+ cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
+
+@@ -47,6 +51,7 @@ char boot_cpu_stack[IRQSTACKSIZE] __attr
+
+ unsigned long __supported_pte_mask __read_mostly = ~0UL;
+ EXPORT_SYMBOL(__supported_pte_mask);
++
+ static int do_not_nx __cpuinitdata = 0;
+
+ /* noexec=on|off
+@@ -90,6 +95,45 @@ static int __init nonx32_setup(char *str
+ __setup("noexec32=", nonx32_setup);
+
+ /*
++ * Copy data used in early init routines from the initial arrays to the
++ * per cpu data areas. These arrays then become expendable and the
++ * *_early_ptr's are zeroed indicating that the static arrays are gone.
++ */
++static void __init setup_per_cpu_maps(void)
++{
++#ifndef CONFIG_XEN
++ int cpu;
++
++ for_each_possible_cpu(cpu) {
++#ifdef CONFIG_SMP
++ if (per_cpu_offset(cpu)) {
++#endif
++ per_cpu(x86_cpu_to_apicid, cpu) =
++ x86_cpu_to_apicid_init[cpu];
++ per_cpu(x86_bios_cpu_apicid, cpu) =
++ x86_bios_cpu_apicid_init[cpu];
++#ifdef CONFIG_NUMA
++ per_cpu(x86_cpu_to_node_map, cpu) =
++ x86_cpu_to_node_map_init[cpu];
++#endif
++#ifdef CONFIG_SMP
++ }
++ else
++ printk(KERN_NOTICE "per_cpu_offset zero for cpu %d\n",
++ cpu);
++#endif
++ }
++
++ /* indicate the early static arrays will soon be gone */
++ x86_cpu_to_apicid_early_ptr = NULL;
++ x86_bios_cpu_apicid_early_ptr = NULL;
++#ifdef CONFIG_NUMA
++ x86_cpu_to_node_map_early_ptr = NULL;
++#endif
++#endif
++}
++
++/*
+ * Great future plan:
+ * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
+ * Always point %gs to its beginning
+@@ -109,19 +153,24 @@ void __init setup_per_cpu_areas(void)
+ printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n", size);
+ for_each_cpu_mask (i, cpu_possible_map) {
+ char *ptr;
++#ifndef CONFIG_NEED_MULTIPLE_NODES
++ ptr = alloc_bootmem_pages(size);
++#else
++ int node = early_cpu_to_node(i);
+
+- if (!NODE_DATA(cpu_to_node(i))) {
+- printk("cpu with no node %d, num_online_nodes %d\n",
+- i, num_online_nodes());
++ if (!node_online(node) || !NODE_DATA(node))
+ ptr = alloc_bootmem_pages(size);
+- } else {
+- ptr = alloc_bootmem_pages_node(NODE_DATA(cpu_to_node(i)), size);
+- }
++ else
++ ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
++#endif
+ if (!ptr)
+ panic("Cannot allocate cpu data for CPU %d\n", i);
+ cpu_pda(i)->data_offset = ptr - __per_cpu_start;
+ memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+ }
++
++ /* setup percpu data maps early */
++ setup_per_cpu_maps();
+ }
+
+ #ifdef CONFIG_XEN
+@@ -224,7 +273,8 @@ void syscall_init(void)
+ wrmsrl(MSR_CSTAR, ignore_sysret);
+
+ /* Flags to clear on syscall */
+- wrmsrl(MSR_SYSCALL_MASK, EF_TF|EF_DF|EF_IE|0x3000);
++ wrmsrl(MSR_SYSCALL_MASK,
++ X86_EFLAGS_TF|X86_EFLAGS_DF|X86_EFLAGS_IF|X86_EFLAGS_IOPL);
+ #endif
+ #ifdef CONFIG_IA32_EMULATION
+ syscall32_cpu_init ();
+@@ -303,7 +353,7 @@ void __cpuinit cpu_init (void)
+ */
+ #ifndef CONFIG_XEN
+ if (cpu)
+- memcpy(cpu_gdt(cpu), cpu_gdt_table, GDT_SIZE);
++ memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
+ #endif
+
+ cpu_gdt_descr[cpu].size = GDT_SIZE;
+@@ -334,10 +384,10 @@ void __cpuinit cpu_init (void)
+ v, cpu);
+ }
+ estacks += PAGE_SIZE << order[v];
+- orig_ist->ist[v] = t->ist[v] = (unsigned long)estacks;
++ orig_ist->ist[v] = t->x86_tss.ist[v] = (unsigned long)estacks;
+ }
+
+- t->io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
++ t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
+ /*
+ * <= is required because the CPU will access up to
+ * 8 bits beyond the end of the IO permission bitmap.
+--- a/arch/x86/kernel/smp_32-xen.c
++++ b/arch/x86/kernel/smp_32-xen.c
+@@ -168,7 +168,7 @@ void __send_IPI_shortcut(unsigned int sh
+ }
+ }
+
+-void fastcall send_IPI_self(int vector)
++void send_IPI_self(int vector)
+ {
+ __send_IPI_shortcut(APIC_DEST_SELF, vector);
+ }
+@@ -224,13 +224,14 @@ static DEFINE_SPINLOCK(tlbstate_lock);
+ * We need to reload %cr3 since the page tables may be going
+ * away from under us..
+ */
+-void leave_mm(unsigned long cpu)
++void leave_mm(int cpu)
+ {
+ if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
+ BUG();
+ cpu_clear(cpu, per_cpu(cpu_tlbstate, cpu).active_mm->cpu_vm_mask);
+ load_cr3(swapper_pg_dir);
+ }
++EXPORT_SYMBOL_GPL(leave_mm);
+
+ /*
+ *
+--- a/arch/x86/kernel/smp_64-xen.c
++++ b/arch/x86/kernel/smp_64-xen.c
+@@ -33,7 +33,7 @@
+
+ #ifndef CONFIG_XEN
+ /*
+- * Smarter SMP flushing macros.
++ * Smarter SMP flushing macros.
+ * c/o Linus Torvalds.
+ *
+ * These mean you can really definitely utterly forget about
+@@ -41,15 +41,15 @@
+ *
+ * Optimizations Manfred Spraul <manfred@colorfullife.com>
+ *
+- * More scalable flush, from Andi Kleen
++ * More scalable flush, from Andi Kleen
+ *
+- * To avoid global state use 8 different call vectors.
+- * Each CPU uses a specific vector to trigger flushes on other
+- * CPUs. Depending on the received vector the target CPUs look into
++ * To avoid global state use 8 different call vectors.
++ * Each CPU uses a specific vector to trigger flushes on other
++ * CPUs. Depending on the received vector the target CPUs look into
+ * the right per cpu variable for the flush data.
+ *
+- * With more than 8 CPUs they are hashed to the 8 available
+- * vectors. The limited global vector space forces us to this right now.
++ * With more than 8 CPUs they are hashed to the 8 available
++ * vectors. The limited global vector space forces us to this right now.
+ * In future when interrupts are split into per CPU domains this could be
+ * fixed, at the cost of triggering multiple IPIs in some cases.
+ */
+@@ -59,7 +59,6 @@ union smp_flush_state {
+ cpumask_t flush_cpumask;
+ struct mm_struct *flush_mm;
+ unsigned long flush_va;
+-#define FLUSH_ALL -1ULL
+ spinlock_t tlbstate_lock;
+ };
+ char pad[SMP_CACHE_BYTES];
+@@ -71,16 +70,17 @@ union smp_flush_state {
+ static DEFINE_PER_CPU(union smp_flush_state, flush_state);
+
+ /*
+- * We cannot call mmdrop() because we are in interrupt context,
++ * We cannot call mmdrop() because we are in interrupt context,
+ * instead update mm->cpu_vm_mask.
+ */
+-static inline void leave_mm(unsigned long cpu)
++void leave_mm(int cpu)
+ {
+ if (read_pda(mmu_state) == TLBSTATE_OK)
+ BUG();
+ cpu_clear(cpu, read_pda(active_mm)->cpu_vm_mask);
+ load_cr3(swapper_pg_dir);
+ }
++EXPORT_SYMBOL_GPL(leave_mm);
+
+ /*
+ *
+@@ -89,25 +89,25 @@ static inline void leave_mm(unsigned lon
+ * 1) switch_mm() either 1a) or 1b)
+ * 1a) thread switch to a different mm
+ * 1a1) cpu_clear(cpu, old_mm->cpu_vm_mask);
+- * Stop ipi delivery for the old mm. This is not synchronized with
+- * the other cpus, but smp_invalidate_interrupt ignore flush ipis
+- * for the wrong mm, and in the worst case we perform a superfluous
+- * tlb flush.
++ * Stop ipi delivery for the old mm. This is not synchronized with
++ * the other cpus, but smp_invalidate_interrupt ignore flush ipis
++ * for the wrong mm, and in the worst case we perform a superfluous
++ * tlb flush.
+ * 1a2) set cpu mmu_state to TLBSTATE_OK
+- * Now the smp_invalidate_interrupt won't call leave_mm if cpu0
++ * Now the smp_invalidate_interrupt won't call leave_mm if cpu0
+ * was in lazy tlb mode.
+ * 1a3) update cpu active_mm
+- * Now cpu0 accepts tlb flushes for the new mm.
++ * Now cpu0 accepts tlb flushes for the new mm.
+ * 1a4) cpu_set(cpu, new_mm->cpu_vm_mask);
+- * Now the other cpus will send tlb flush ipis.
++ * Now the other cpus will send tlb flush ipis.
+ * 1a4) change cr3.
+ * 1b) thread switch without mm change
+ * cpu active_mm is correct, cpu0 already handles
+ * flush ipis.
+ * 1b1) set cpu mmu_state to TLBSTATE_OK
+ * 1b2) test_and_set the cpu bit in cpu_vm_mask.
+- * Atomically set the bit [other cpus will start sending flush ipis],
+- * and test the bit.
++ * Atomically set the bit [other cpus will start sending flush ipis],
++ * and test the bit.
+ * 1b3) if the bit was 0: leave_mm was called, flush the tlb.
+ * 2) switch %%esp, ie current
+ *
+@@ -141,12 +141,12 @@ asmlinkage void smp_invalidate_interrupt
+ * orig_rax contains the negated interrupt vector.
+ * Use that to determine where the sender put the data.
+ */
+- sender = ~regs->orig_rax - INVALIDATE_TLB_VECTOR_START;
++ sender = ~regs->orig_ax - INVALIDATE_TLB_VECTOR_START;
+ f = &per_cpu(flush_state, sender);
+
+ if (!cpu_isset(cpu, f->flush_cpumask))
+ goto out;
+- /*
++ /*
+ * This was a BUG() but until someone can quote me the
+ * line from the intel manual that guarantees an IPI to
+ * multiple CPUs is retried _only_ on the erroring CPUs
+@@ -154,10 +154,10 @@ asmlinkage void smp_invalidate_interrupt
+ *
+ * BUG();
+ */
+-
++
+ if (f->flush_mm == read_pda(active_mm)) {
+ if (read_pda(mmu_state) == TLBSTATE_OK) {
+- if (f->flush_va == FLUSH_ALL)
++ if (f->flush_va == TLB_FLUSH_ALL)
+ local_flush_tlb();
+ else
+ __flush_tlb_one(f->flush_va);
+@@ -170,19 +170,22 @@ out:
+ add_pda(irq_tlb_count, 1);
+ }
+
+-static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
+- unsigned long va)
++void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
++ unsigned long va)
+ {
+ int sender;
+ union smp_flush_state *f;
++ cpumask_t cpumask = *cpumaskp;
+
+ /* Caller has disabled preemption */
+ sender = smp_processor_id() % NUM_INVALIDATE_TLB_VECTORS;
+ f = &per_cpu(flush_state, sender);
+
+- /* Could avoid this lock when
+- num_online_cpus() <= NUM_INVALIDATE_TLB_VECTORS, but it is
+- probably not worth checking this for a cache-hot lock. */
++ /*
++ * Could avoid this lock when
++ * num_online_cpus() <= NUM_INVALIDATE_TLB_VECTORS, but it is
++ * probably not worth checking this for a cache-hot lock.
++ */
+ spin_lock(&f->tlbstate_lock);
+
+ f->flush_mm = mm;
+@@ -206,14 +209,14 @@ static void flush_tlb_others(cpumask_t c
+ int __cpuinit init_smp_flush(void)
+ {
+ int i;
++
+ for_each_cpu_mask(i, cpu_possible_map) {
+ spin_lock_init(&per_cpu(flush_state, i).tlbstate_lock);
+ }
+ return 0;
+ }
+-
+ core_initcall(init_smp_flush);
+-
++
+ void flush_tlb_current_task(void)
+ {
+ struct mm_struct *mm = current->mm;
+@@ -225,10 +228,9 @@ void flush_tlb_current_task(void)
+
+ local_flush_tlb();
+ if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
++ flush_tlb_others(cpu_mask, mm, TLB_FLUSH_ALL);
+ preempt_enable();
+ }
+-EXPORT_SYMBOL(flush_tlb_current_task);
+
+ void flush_tlb_mm (struct mm_struct * mm)
+ {
+@@ -245,11 +247,10 @@ void flush_tlb_mm (struct mm_struct * mm
+ leave_mm(smp_processor_id());
+ }
+ if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
++ flush_tlb_others(cpu_mask, mm, TLB_FLUSH_ALL);
+
+ preempt_enable();
+ }
+-EXPORT_SYMBOL(flush_tlb_mm);
+
+ void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
+ {
+@@ -263,8 +264,8 @@ void flush_tlb_page(struct vm_area_struc
+ if (current->active_mm == mm) {
+ if(current->mm)
+ __flush_tlb_one(va);
+- else
+- leave_mm(smp_processor_id());
++ else
++ leave_mm(smp_processor_id());
+ }
+
+ if (!cpus_empty(cpu_mask))
+@@ -272,7 +273,6 @@ void flush_tlb_page(struct vm_area_struc
+
+ preempt_enable();
+ }
+-EXPORT_SYMBOL(flush_tlb_page);
+
+ static void do_flush_tlb_all(void* info)
+ {
+@@ -330,11 +330,9 @@ void unlock_ipi_call_lock(void)
+ * this function sends a 'generic call function' IPI to all other CPU
+ * of the system defined in the mask.
+ */
+-
+-static int
+-__smp_call_function_mask(cpumask_t mask,
+- void (*func)(void *), void *info,
+- int wait)
++static int __smp_call_function_mask(cpumask_t mask,
++ void (*func)(void *), void *info,
++ int wait)
+ {
+ struct call_data_struct data;
+ cpumask_t allbutself;
+@@ -422,11 +420,10 @@ EXPORT_SYMBOL(smp_call_function_mask);
+ */
+
+ int smp_call_function_single (int cpu, void (*func) (void *info), void *info,
+- int nonatomic, int wait)
++ int nonatomic, int wait)
+ {
+ /* prevent preemption and reschedule on another processor */
+- int ret;
+- int me = get_cpu();
++ int ret, me = get_cpu();
+
+ /* Can deadlock when called with interrupts disabled */
+ WARN_ON(irqs_disabled());
+@@ -476,9 +473,9 @@ static void stop_this_cpu(void *dummy)
+ */
+ cpu_clear(smp_processor_id(), cpu_online_map);
+ disable_all_local_evtchn();
+- for (;;)
++ for (;;)
+ halt();
+-}
++}
+
+ void smp_send_stop(void)
+ {
+--- a/arch/x86/kernel/time_32-xen.c
++++ b/arch/x86/kernel/time_32-xen.c
+@@ -28,21 +28,9 @@
+ * serialize accesses to xtime/lost_ticks).
+ */
+
+-#include <linux/errno.h>
+-#include <linux/sched.h>
+-#include <linux/kernel.h>
+-#include <linux/param.h>
+-#include <linux/string.h>
+-#include <linux/mm.h>
++#include <linux/init.h>
+ #include <linux/interrupt.h>
+ #include <linux/time.h>
+-#include <linux/delay.h>
+-#include <linux/init.h>
+-#include <linux/smp.h>
+-#include <linux/module.h>
+-#include <linux/sysdev.h>
+-#include <linux/bcd.h>
+-#include <linux/efi.h>
+ #include <linux/mca.h>
+ #include <linux/sysctl.h>
+ #include <linux/percpu.h>
+@@ -50,26 +38,10 @@
+ #include <linux/posix-timers.h>
+ #include <linux/cpufreq.h>
+ #include <linux/clocksource.h>
++#include <linux/sysdev.h>
+
+-#include <asm/io.h>
+-#include <asm/smp.h>
+-#include <asm/irq.h>
+-#include <asm/msr.h>
+ #include <asm/delay.h>
+-#include <asm/mpspec.h>
+-#include <asm/uaccess.h>
+-#include <asm/processor.h>
+-#include <asm/timer.h>
+ #include <asm/time.h>
+-#include <asm/sections.h>
+-
+-#include "mach_time.h"
+-
+-#include <linux/timex.h>
+-
+-#include <asm/hpet.h>
+-
+-#include <asm/arch_hooks.h>
+
+ #include <xen/evtchn.h>
+ #include <xen/sysctl.h>
+@@ -89,9 +61,6 @@ volatile unsigned long __jiffies __secti
+ unsigned int cpu_khz; /* Detected as we calibrate the TSC */
+ EXPORT_SYMBOL(cpu_khz);
+
+-DEFINE_SPINLOCK(rtc_lock);
+-EXPORT_SYMBOL(rtc_lock);
+-
+ /* These are peridically updated in shared_info, and then copied here. */
+ struct shadow_time_info {
+ u64 tsc_timestamp; /* TSC at last update of time vals. */
+@@ -154,6 +123,11 @@ static int __init __independent_wallcloc
+ }
+ __setup("independent_wallclock", __independent_wallclock);
+
++int xen_independent_wallclock(void)
++{
++ return independent_wallclock;
++}
++
+ /* Permitted clock jitter, in nsecs, beyond which a warning will be printed. */
+ static unsigned long permitted_clock_jitter = 10000000UL; /* 10ms */
+ static int __init __permitted_clock_jitter(char *str)
+@@ -223,7 +197,6 @@ static inline u64 get64(volatile u64 *pt
+ return cmpxchg64(ptr, 0, 0);
+ #else
+ return *ptr;
+-#define cmpxchg64 cmpxchg
+ #endif
+ }
+
+@@ -233,7 +206,6 @@ static inline u64 get64_local(volatile u
+ return cmpxchg64_local(ptr, 0, 0);
+ #else
+ return *ptr;
+-#define cmpxchg64_local cmpxchg_local
+ #endif
+ }
+
+@@ -341,35 +313,6 @@ static inline int time_values_up_to_date
+ return (dst->version == src->version);
+ }
+
+-/*
+- * This is a special lock that is owned by the CPU and holds the index
+- * register we are working with. It is required for NMI access to the
+- * CMOS/RTC registers. See include/asm-i386/mc146818rtc.h for details.
+- */
+-volatile unsigned long cmos_lock = 0;
+-EXPORT_SYMBOL(cmos_lock);
+-
+-/* Routines for accessing the CMOS RAM/RTC. */
+-unsigned char rtc_cmos_read(unsigned char addr)
+-{
+- unsigned char val;
+- lock_cmos_prefix(addr);
+- outb_p(addr, RTC_PORT(0));
+- val = inb_p(RTC_PORT(1));
+- lock_cmos_suffix(addr);
+- return val;
+-}
+-EXPORT_SYMBOL(rtc_cmos_read);
+-
+-void rtc_cmos_write(unsigned char val, unsigned char addr)
+-{
+- lock_cmos_prefix(addr);
+- outb_p(addr, RTC_PORT(0));
+- outb_p(val, RTC_PORT(1));
+- lock_cmos_suffix(addr);
+-}
+-EXPORT_SYMBOL(rtc_cmos_write);
+-
+ static void sync_xen_wallclock(unsigned long dummy);
+ static DEFINE_TIMER(sync_xen_wallclock_timer, sync_xen_wallclock, 0, 0);
+ static void sync_xen_wallclock(unsigned long dummy)
+@@ -378,7 +321,8 @@ static void sync_xen_wallclock(unsigned
+ s64 nsec;
+ struct xen_platform_op op;
+
+- if (!ntp_synced() || independent_wallclock || !is_initial_xendomain())
++ BUG_ON(!is_initial_xendomain());
++ if (!ntp_synced() || independent_wallclock)
+ return;
+
+ write_seqlock_irq(&xtime_lock);
+@@ -401,23 +345,6 @@ static void sync_xen_wallclock(unsigned
+ mod_timer(&sync_xen_wallclock_timer, jiffies + 60*HZ);
+ }
+
+-static int set_rtc_mmss(unsigned long nowtime)
+-{
+- int retval;
+- unsigned long flags;
+-
+- if (independent_wallclock || !is_initial_xendomain())
+- return 0;
+-
+- /* gets recalled with irq locally disabled */
+- /* XXX - does irqsave resolve this? -johnstul */
+- spin_lock_irqsave(&rtc_lock, flags);
+- retval = set_wallclock(nowtime);
+- spin_unlock_irqrestore(&rtc_lock, flags);
+-
+- return retval;
+-}
+-
+ static unsigned long long local_clock(void)
+ {
+ unsigned int cpu = get_cpu();
+@@ -500,28 +427,24 @@ unsigned long profile_pc(struct pt_regs
+
+ #if defined(CONFIG_SMP) || defined(__x86_64__)
+ # ifdef __i386__
+- if (!v8086_mode(regs) && SEGMENT_IS_KERNEL_CODE(regs->xcs)
++ if (!v8086_mode(regs) && SEGMENT_IS_KERNEL_CODE(regs->cs)
+ # else
+ if (!user_mode(regs)
+ # endif
+ && in_lock_functions(pc)) {
+ # ifdef CONFIG_FRAME_POINTER
+-# ifdef __i386__
+- return ((unsigned long *)regs->ebp)[1];
+-# else
+- return ((unsigned long *)regs->rbp)[1];
+-# endif
++ return ((unsigned long *)regs->bp)[1];
+ # else
+ # ifdef __i386__
+- unsigned long *sp = (unsigned long *)®s->esp;
++ unsigned long *sp = (unsigned long *)®s->sp;
+ # else
+- unsigned long *sp = (unsigned long *)regs->rsp;
++ unsigned long *sp = (unsigned long *)regs->sp;
+ # endif
+
+ /* Return address is either directly at stack pointer
+- or above a saved eflags. Eflags has bits 22-31 zero,
++ or above a saved flags. Eflags has bits 22-31 zero,
+ kernel addresses don't. */
+- if (sp[0] >> 22)
++ if (sp[0] >> 22)
+ return sp[0];
+ if (sp[1] >> 22)
+ return sp[1];
+@@ -750,25 +673,32 @@ static void init_missing_ticks_accountin
+ runstate->time[RUNSTATE_offline];
+ }
+
+-/* not static: needed by APM */
+-unsigned long read_persistent_clock(void)
++unsigned long xen_read_persistent_clock(void)
+ {
+- unsigned long retval;
+- unsigned long flags;
+-
+- spin_lock_irqsave(&rtc_lock, flags);
++ const shared_info_t *s = HYPERVISOR_shared_info;
++ u32 version, sec, nsec;
++ u64 delta;
+
+- retval = get_wallclock();
++ do {
++ version = s->wc_version;
++ rmb();
++ sec = s->wc_sec;
++ nsec = s->wc_nsec;
++ rmb();
++ } while ((s->wc_version & 1) | (version ^ s->wc_version));
+
+- spin_unlock_irqrestore(&rtc_lock, flags);
++ delta = local_clock() + (u64)sec * NSEC_PER_SEC + nsec;
++ do_div(delta, NSEC_PER_SEC);
+
+- return retval;
++ return delta;
+ }
+
+-int update_persistent_clock(struct timespec now)
++int xen_update_persistent_clock(void)
+ {
++ if (!is_initial_xendomain())
++ return -1;
+ mod_timer(&sync_xen_wallclock_timer, jiffies + 1);
+- return set_rtc_mmss(now.tv_sec);
++ return 0;
+ }
+
+ extern void (*late_time_init)(void);
+--- a/arch/x86/kernel/traps_32-xen.c
++++ b/arch/x86/kernel/traps_32-xen.c
+@@ -79,7 +79,8 @@ char ignore_fpu_irq = 0;
+ * F0 0F bug workaround.. We have a special link segment
+ * for this.
+ */
+-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
++gate_desc idt_table[256]
++ __attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+ #endif
+
+ asmlinkage void divide_error(void);
+@@ -109,6 +110,34 @@ asmlinkage void machine_check(void);
+ int kstack_depth_to_print = 24;
+ static unsigned int code_bytes = 64;
+
++void printk_address(unsigned long address, int reliable)
++{
++#ifdef CONFIG_KALLSYMS
++ unsigned long offset = 0, symsize;
++ const char *symname;
++ char *modname;
++ char *delim = ":";
++ char namebuf[128];
++ char reliab[4] = "";
++
++ symname = kallsyms_lookup(address, &symsize, &offset,
++ &modname, namebuf);
++ if (!symname) {
++ printk(" [<%08lx>]\n", address);
++ return;
++ }
++ if (!reliable)
++ strcpy(reliab, "? ");
++
++ if (!modname)
++ modname = delim = "";
++ printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
++ address, reliab, delim, modname, delim, symname, offset, symsize);
++#else
++ printk(" [<%08lx>]\n", address);
++#endif
++}
++
+ static inline int valid_stack_ptr(struct thread_info *tinfo, void *p, unsigned size)
+ {
+ return p > (void *)tinfo &&
+@@ -122,48 +151,35 @@ struct stack_frame {
+ };
+
+ static inline unsigned long print_context_stack(struct thread_info *tinfo,
+- unsigned long *stack, unsigned long ebp,
++ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+ {
+-#ifdef CONFIG_FRAME_POINTER
+- struct stack_frame *frame = (struct stack_frame *)ebp;
+- while (valid_stack_ptr(tinfo, frame, sizeof(*frame))) {
+- struct stack_frame *next;
+- unsigned long addr;
++ struct stack_frame *frame = (struct stack_frame *)bp;
+
+- addr = frame->return_address;
+- ops->address(data, addr);
+- /*
+- * break out of recursive entries (such as
+- * end_of_stack_stop_unwind_function). Also,
+- * we can never allow a frame pointer to
+- * move downwards!
+- */
+- next = frame->next_frame;
+- if (next <= frame)
+- break;
+- frame = next;
+- }
+-#else
+ while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
+ unsigned long addr;
+
+- addr = *stack++;
+- if (__kernel_text_address(addr))
+- ops->address(data, addr);
++ addr = *stack;
++ if (__kernel_text_address(addr)) {
++ if ((unsigned long) stack == bp + 4) {
++ ops->address(data, addr, 1);
++ frame = frame->next_frame;
++ bp = (unsigned long) frame;
++ } else {
++ ops->address(data, addr, bp == 0);
++ }
++ }
++ stack++;
+ }
+-#endif
+- return ebp;
++ return bp;
+ }
+
+ #define MSG(msg) ops->warning(data, msg)
+
+ void dump_trace(struct task_struct *task, struct pt_regs *regs,
+- unsigned long *stack,
++ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+ {
+- unsigned long ebp = 0;
+-
+ if (!task)
+ task = current;
+
+@@ -171,17 +187,17 @@ void dump_trace(struct task_struct *task
+ unsigned long dummy;
+ stack = &dummy;
+ if (task != current)
+- stack = (unsigned long *)task->thread.esp;
++ stack = (unsigned long *)task->thread.sp;
+ }
+
+ #ifdef CONFIG_FRAME_POINTER
+- if (!ebp) {
++ if (!bp) {
+ if (task == current) {
+- /* Grab ebp right from our regs */
+- asm ("movl %%ebp, %0" : "=r" (ebp) : );
++ /* Grab bp right from our regs */
++ asm ("movl %%ebp, %0" : "=r" (bp) : );
+ } else {
+- /* ebp is the last reg pushed by switch_to */
+- ebp = *(unsigned long *) task->thread.esp;
++ /* bp is the last reg pushed by switch_to */
++ bp = *(unsigned long *) task->thread.sp;
+ }
+ }
+ #endif
+@@ -190,7 +206,7 @@ void dump_trace(struct task_struct *task
+ struct thread_info *context;
+ context = (struct thread_info *)
+ ((unsigned long)stack & (~(THREAD_SIZE - 1)));
+- ebp = print_context_stack(context, stack, ebp, ops, data);
++ bp = print_context_stack(context, stack, bp, ops, data);
+ /* Should be after the line below, but somewhere
+ in early boot context comes out corrupted and we
+ can't reference it -AK */
+@@ -225,9 +241,11 @@ static int print_trace_stack(void *data,
+ /*
+ * Print one address/symbol entries per line.
+ */
+-static void print_trace_address(void *data, unsigned long addr)
++static void print_trace_address(void *data, unsigned long addr, int reliable)
+ {
+ printk("%s [<%08lx>] ", (char *)data, addr);
++ if (!reliable)
++ printk("? ");
+ print_symbol("%s\n", addr);
+ touch_nmi_watchdog();
+ }
+@@ -241,32 +259,32 @@ static const struct stacktrace_ops print
+
+ static void
+ show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+- unsigned long * stack, char *log_lvl)
++ unsigned long *stack, unsigned long bp, char *log_lvl)
+ {
+- dump_trace(task, regs, stack, &print_trace_ops, log_lvl);
++ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+ printk("%s =======================\n", log_lvl);
+ }
+
+ void show_trace(struct task_struct *task, struct pt_regs *regs,
+- unsigned long * stack)
++ unsigned long *stack, unsigned long bp)
+ {
+- show_trace_log_lvl(task, regs, stack, "");
++ show_trace_log_lvl(task, regs, stack, bp, "");
+ }
+
+ static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+- unsigned long *esp, char *log_lvl)
++ unsigned long *sp, unsigned long bp, char *log_lvl)
+ {
+ unsigned long *stack;
+ int i;
+
+- if (esp == NULL) {
++ if (sp == NULL) {
+ if (task)
+- esp = (unsigned long*)task->thread.esp;
++ sp = (unsigned long*)task->thread.sp;
+ else
+- esp = (unsigned long *)&esp;
++ sp = (unsigned long *)&sp;
+ }
+
+- stack = esp;
++ stack = sp;
+ for(i = 0; i < kstack_depth_to_print; i++) {
+ if (kstack_end(stack))
+ break;
+@@ -275,13 +293,13 @@ static void show_stack_log_lvl(struct ta
+ printk("%08lx ", *stack++);
+ }
+ printk("\n%sCall Trace:\n", log_lvl);
+- show_trace_log_lvl(task, regs, esp, log_lvl);
++ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+ }
+
+-void show_stack(struct task_struct *task, unsigned long *esp)
++void show_stack(struct task_struct *task, unsigned long *sp)
+ {
+ printk(" ");
+- show_stack_log_lvl(task, NULL, esp, "");
++ show_stack_log_lvl(task, NULL, sp, 0, "");
+ }
+
+ /*
+@@ -290,13 +308,19 @@ void show_stack(struct task_struct *task
+ void dump_stack(void)
+ {
+ unsigned long stack;
++ unsigned long bp = 0;
++
++#ifdef CONFIG_FRAME_POINTER
++ if (!bp)
++ asm("movl %%ebp, %0" : "=r" (bp):);
++#endif
+
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+- show_trace(current, NULL, &stack);
++ show_trace(current, NULL, &stack, bp);
+ }
+
+ EXPORT_SYMBOL(dump_stack);
+@@ -315,30 +339,30 @@ void show_registers(struct pt_regs *regs
+ * time of the fault..
+ */
+ if (!user_mode_vm(regs)) {
+- u8 *eip;
++ u8 *ip;
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
+
+ printk("\n" KERN_EMERG "Stack: ");
+- show_stack_log_lvl(NULL, regs, ®s->esp, KERN_EMERG);
++ show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
+
+ printk(KERN_EMERG "Code: ");
+
+- eip = (u8 *)regs->eip - code_prologue;
+- if (eip < (u8 *)PAGE_OFFSET ||
+- probe_kernel_address(eip, c)) {
++ ip = (u8 *)regs->ip - code_prologue;
++ if (ip < (u8 *)PAGE_OFFSET ||
++ probe_kernel_address(ip, c)) {
+ /* try starting at EIP */
+- eip = (u8 *)regs->eip;
++ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+- for (i = 0; i < code_len; i++, eip++) {
+- if (eip < (u8 *)PAGE_OFFSET ||
+- probe_kernel_address(eip, c)) {
++ for (i = 0; i < code_len; i++, ip++) {
++ if (ip < (u8 *)PAGE_OFFSET ||
++ probe_kernel_address(ip, c)) {
+ printk(" Bad EIP value.");
+ break;
+ }
+- if (eip == (u8 *)regs->eip)
++ if (ip == (u8 *)regs->ip)
+ printk("<%02x> ", c);
+ else
+ printk("%02x ", c);
+@@ -347,18 +371,57 @@ void show_registers(struct pt_regs *regs
+ printk("\n");
+ }
+
+-int is_valid_bugaddr(unsigned long eip)
++int is_valid_bugaddr(unsigned long ip)
+ {
+ unsigned short ud2;
+
+- if (eip < PAGE_OFFSET)
++ if (ip < PAGE_OFFSET)
+ return 0;
+- if (probe_kernel_address((unsigned short *)eip, ud2))
++ if (probe_kernel_address((unsigned short *)ip, ud2))
+ return 0;
+
+ return ud2 == 0x0b0f;
+ }
+
++static int die_counter;
++
++int __kprobes __die(const char * str, struct pt_regs * regs, long err)
++{
++ unsigned long sp;
++ unsigned short ss;
++
++ printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
++#ifdef CONFIG_PREEMPT
++ printk("PREEMPT ");
++#endif
++#ifdef CONFIG_SMP
++ printk("SMP ");
++#endif
++#ifdef CONFIG_DEBUG_PAGEALLOC
++ printk("DEBUG_PAGEALLOC");
++#endif
++ printk("\n");
++
++ if (notify_die(DIE_OOPS, str, regs, err,
++ current->thread.trap_no, SIGSEGV) !=
++ NOTIFY_STOP) {
++ show_registers(regs);
++ /* Executive summary in case the oops scrolled away */
++ sp = (unsigned long) (®s->sp);
++ savesegment(ss, ss);
++ if (user_mode(regs)) {
++ sp = regs->sp;
++ ss = regs->ss & 0xffff;
++ }
++ printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
++ print_symbol("%s", regs->ip);
++ printk(" SS:ESP %04x:%08lx\n", ss, sp);
++ return 0;
++ } else {
++ return 1;
++ }
++}
++
+ /*
+ * This is gone through when something in the kernel has done something bad and
+ * is about to be terminated.
+@@ -374,7 +437,6 @@ void die(const char * str, struct pt_reg
+ .lock_owner = -1,
+ .lock_owner_depth = 0
+ };
+- static int die_counter;
+ unsigned long flags;
+
+ oops_enter();
+@@ -390,43 +452,13 @@ void die(const char * str, struct pt_reg
+ raw_local_irq_save(flags);
+
+ if (++die.lock_owner_depth < 3) {
+- unsigned long esp;
+- unsigned short ss;
+-
+- report_bug(regs->eip, regs);
+-
+- printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff,
+- ++die_counter);
+-#ifdef CONFIG_PREEMPT
+- printk("PREEMPT ");
+-#endif
+-#ifdef CONFIG_SMP
+- printk("SMP ");
+-#endif
+-#ifdef CONFIG_DEBUG_PAGEALLOC
+- printk("DEBUG_PAGEALLOC");
+-#endif
+- printk("\n");
++ report_bug(regs->ip, regs);
+
+- if (notify_die(DIE_OOPS, str, regs, err,
+- current->thread.trap_no, SIGSEGV) !=
+- NOTIFY_STOP) {
+- show_registers(regs);
+- /* Executive summary in case the oops scrolled away */
+- esp = (unsigned long) (®s->esp);
+- savesegment(ss, ss);
+- if (user_mode(regs)) {
+- esp = regs->esp;
+- ss = regs->xss & 0xffff;
+- }
+- printk(KERN_EMERG "EIP: [<%08lx>] ", regs->eip);
+- print_symbol("%s", regs->eip);
+- printk(" SS:ESP %04x:%08lx\n", ss, esp);
+- }
+- else
++ if (__die(str, regs, err))
+ regs = NULL;
+- } else
++ } else {
+ printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
++ }
+
+ bust_spinlocks(0);
+ die.lock_owner = -1;
+@@ -462,7 +494,7 @@ static void __kprobes do_trap(int trapnr
+ {
+ struct task_struct *tsk = current;
+
+- if (regs->eflags & VM_MASK) {
++ if (regs->flags & VM_MASK) {
+ if (vm86)
+ goto vm86_trap;
+ goto trap_signal;
+@@ -508,7 +540,7 @@ static void __kprobes do_trap(int trapnr
+ }
+
+ #define DO_ERROR(trapnr, signr, str, name) \
+-fastcall void do_##name(struct pt_regs * regs, long error_code) \
++void do_##name(struct pt_regs * regs, long error_code) \
+ { \
+ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+ == NOTIFY_STOP) \
+@@ -517,7 +549,7 @@ fastcall void do_##name(struct pt_regs *
+ }
+
+ #define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
+-fastcall void do_##name(struct pt_regs * regs, long error_code) \
++void do_##name(struct pt_regs * regs, long error_code) \
+ { \
+ siginfo_t info; \
+ if (irq) \
+@@ -533,7 +565,7 @@ fastcall void do_##name(struct pt_regs *
+ }
+
+ #define DO_VM86_ERROR(trapnr, signr, str, name) \
+-fastcall void do_##name(struct pt_regs * regs, long error_code) \
++void do_##name(struct pt_regs * regs, long error_code) \
+ { \
+ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+ == NOTIFY_STOP) \
+@@ -542,7 +574,7 @@ fastcall void do_##name(struct pt_regs *
+ }
+
+ #define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
+-fastcall void do_##name(struct pt_regs * regs, long error_code) \
++void do_##name(struct pt_regs * regs, long error_code) \
+ { \
+ siginfo_t info; \
+ info.si_signo = signr; \
+@@ -556,13 +588,13 @@ fastcall void do_##name(struct pt_regs *
+ do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
+ }
+
+-DO_VM86_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->eip)
++DO_VM86_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+ #ifndef CONFIG_KPROBES
+ DO_VM86_ERROR( 3, SIGTRAP, "int3", int3)
+ #endif
+ DO_VM86_ERROR( 4, SIGSEGV, "overflow", overflow)
+ DO_VM86_ERROR( 5, SIGSEGV, "bounds", bounds)
+-DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip, 0)
++DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
+ DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
+ DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
+ DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+@@ -570,10 +602,10 @@ DO_ERROR(12, SIGBUS, "stack segment", s
+ DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
+ DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0, 1)
+
+-fastcall void __kprobes do_general_protection(struct pt_regs * regs,
++void __kprobes do_general_protection(struct pt_regs * regs,
+ long error_code)
+ {
+- if (regs->eflags & VM_MASK)
++ if (regs->flags & VM_MASK)
+ goto gp_in_vm86;
+
+ if (!user_mode(regs))
+@@ -582,11 +614,14 @@ fastcall void __kprobes do_general_prote
+ current->thread.error_code = error_code;
+ current->thread.trap_no = 13;
+ if (show_unhandled_signals && unhandled_signal(current, SIGSEGV) &&
+- printk_ratelimit())
++ printk_ratelimit()) {
+ printk(KERN_INFO
+- "%s[%d] general protection eip:%lx esp:%lx error:%lx\n",
++ "%s[%d] general protection ip:%lx sp:%lx error:%lx",
+ current->comm, task_pid_nr(current),
+- regs->eip, regs->esp, error_code);
++ regs->ip, regs->sp, error_code);
++ print_vma_addr(" in ", regs->ip);
++ printk("\n");
++ }
+
+ force_sig(SIGSEGV, current);
+ return;
+@@ -675,8 +710,8 @@ void __kprobes die_nmi(struct pt_regs *r
+ */
+ bust_spinlocks(1);
+ printk(KERN_EMERG "%s", msg);
+- printk(" on CPU%d, eip %08lx, registers:\n",
+- smp_processor_id(), regs->eip);
++ printk(" on CPU%d, ip %08lx, registers:\n",
++ smp_processor_id(), regs->ip);
+ show_registers(regs);
+ console_silent();
+ spin_unlock(&nmi_print_lock);
+@@ -733,7 +768,7 @@ static __kprobes void default_do_nmi(str
+
+ static int ignore_nmis;
+
+-fastcall __kprobes void do_nmi(struct pt_regs * regs, long error_code)
++__kprobes void do_nmi(struct pt_regs * regs, long error_code)
+ {
+ int cpu;
+
+@@ -762,7 +797,7 @@ void restart_nmi(void)
+ }
+
+ #ifdef CONFIG_KPROBES
+-fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
++void __kprobes do_int3(struct pt_regs *regs, long error_code)
+ {
+ trace_hardirqs_fixup();
+
+@@ -798,7 +833,7 @@ fastcall void __kprobes do_int3(struct p
+ * find every occurrence of the TF bit that could be saved away even
+ * by user code)
+ */
+-fastcall void __kprobes do_debug(struct pt_regs * regs, long error_code)
++void __kprobes do_debug(struct pt_regs * regs, long error_code)
+ {
+ unsigned int condition;
+ struct task_struct *tsk = current;
+@@ -807,24 +842,30 @@ fastcall void __kprobes do_debug(struct
+
+ get_debugreg(condition, 6);
+
++ /*
++ * The processor cleared BTF, so don't mark that we need it set.
++ */
++ clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
++ tsk->thread.debugctlmsr = 0;
++
+ if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
+ SIGTRAP) == NOTIFY_STOP)
+ return;
+ /* It's safe to allow irq's after DR6 has been saved */
+- if (regs->eflags & X86_EFLAGS_IF)
++ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
+
+ /* Mask out spurious debug traps due to lazy DR7 setting */
+ if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
+- if (!tsk->thread.debugreg[7])
++ if (!tsk->thread.debugreg7)
+ goto clear_dr7;
+ }
+
+- if (regs->eflags & VM_MASK)
++ if (regs->flags & VM_MASK)
+ goto debug_vm86;
+
+ /* Save debug status register where ptrace can see it */
+- tsk->thread.debugreg[6] = condition;
++ tsk->thread.debugreg6 = condition;
+
+ /*
+ * Single-stepping through TF: make sure we ignore any events in
+@@ -856,7 +897,7 @@ debug_vm86:
+
+ clear_TF_reenable:
+ set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
+- regs->eflags &= ~TF_MASK;
++ regs->flags &= ~TF_MASK;
+ return;
+ }
+
+@@ -865,7 +906,7 @@ clear_TF_reenable:
+ * the correct behaviour even in the presence of the asynchronous
+ * IRQ13 behaviour
+ */
+-void math_error(void __user *eip)
++void math_error(void __user *ip)
+ {
+ struct task_struct * task;
+ siginfo_t info;
+@@ -881,7 +922,7 @@ void math_error(void __user *eip)
+ info.si_signo = SIGFPE;
+ info.si_errno = 0;
+ info.si_code = __SI_FAULT;
+- info.si_addr = eip;
++ info.si_addr = ip;
+ /*
+ * (~cwd & swd) will mask out exceptions that are not set to unmasked
+ * status. 0x3f is the exception bits in these regs, 0x200 is the
+@@ -924,13 +965,13 @@ void math_error(void __user *eip)
+ force_sig_info(SIGFPE, &info, task);
+ }
+
+-fastcall void do_coprocessor_error(struct pt_regs * regs, long error_code)
++void do_coprocessor_error(struct pt_regs * regs, long error_code)
+ {
+ ignore_fpu_irq = 1;
+- math_error((void __user *)regs->eip);
++ math_error((void __user *)regs->ip);
+ }
+
+-static void simd_math_error(void __user *eip)
++static void simd_math_error(void __user *ip)
+ {
+ struct task_struct * task;
+ siginfo_t info;
+@@ -946,7 +987,7 @@ static void simd_math_error(void __user
+ info.si_signo = SIGFPE;
+ info.si_errno = 0;
+ info.si_code = __SI_FAULT;
+- info.si_addr = eip;
++ info.si_addr = ip;
+ /*
+ * The SIMD FPU exceptions are handled a little differently, as there
+ * is only a single status/control register. Thus, to determine which
+@@ -978,19 +1019,19 @@ static void simd_math_error(void __user
+ force_sig_info(SIGFPE, &info, task);
+ }
+
+-fastcall void do_simd_coprocessor_error(struct pt_regs * regs,
++void do_simd_coprocessor_error(struct pt_regs * regs,
+ long error_code)
+ {
+ if (cpu_has_xmm) {
+ /* Handle SIMD FPU exceptions on PIII+ processors. */
+ ignore_fpu_irq = 1;
+- simd_math_error((void __user *)regs->eip);
++ simd_math_error((void __user *)regs->ip);
+ } else {
+ /*
+ * Handle strange cache flush from user space exception
+ * in all other cases. This is undocumented behaviour.
+ */
+- if (regs->eflags & VM_MASK) {
++ if (regs->flags & VM_MASK) {
+ handle_vm86_fault((struct kernel_vm86_regs *)regs,
+ error_code);
+ return;
+@@ -1003,7 +1044,7 @@ fastcall void do_simd_coprocessor_error(
+ }
+
+ #ifndef CONFIG_XEN
+-fastcall void do_spurious_interrupt_bug(struct pt_regs * regs,
++void do_spurious_interrupt_bug(struct pt_regs * regs,
+ long error_code)
+ {
+ #if 0
+@@ -1012,7 +1053,7 @@ fastcall void do_spurious_interrupt_bug(
+ #endif
+ }
+
+-fastcall unsigned long patch_espfix_desc(unsigned long uesp,
++unsigned long patch_espfix_desc(unsigned long uesp,
+ unsigned long kesp)
+ {
+ struct desc_struct *gdt = __get_cpu_var(gdt_page).gdt;
+@@ -1072,7 +1113,7 @@ asmlinkage void math_emulate(long arg)
+ * NB. All these are "trap gates" (i.e. events_mask isn't set) except
+ * for those that specify <dpl>|4 in the second field.
+ */
+-static trap_info_t __cpuinitdata trap_table[] = {
++static const trap_info_t __cpuinitconst trap_table[] = {
+ { 0, 0, __KERNEL_CS, (unsigned long)divide_error },
+ { 1, 0|4, __KERNEL_CS, (unsigned long)debug },
+ { 3, 3|4, __KERNEL_CS, (unsigned long)int3 },
+@@ -1105,17 +1146,12 @@ void __init trap_init(void)
+ if (ret)
+ printk("HYPERVISOR_set_trap_table failed: error %d\n", ret);
+
++ /*
++ * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned.
++ * Generate a build-time error if the alignment is wrong.
++ */
++ BUILD_BUG_ON(offsetof(struct task_struct, thread.i387.fxsave) & 15);
+ if (cpu_has_fxsr) {
+- /*
+- * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned.
+- * Generates a compile-time "error: zero width for bit-field" if
+- * the alignment is wrong.
+- */
+- struct fxsrAlignAssert {
+- int _:!(offsetof(struct task_struct,
+- thread.i387.fxsave) & 15);
+- };
+-
+ printk(KERN_INFO "Enabling fast FPU save and restore... ");
+ set_in_cr4(X86_CR4_OSFXSR);
+ printk("done.\n");
+--- a/arch/x86/kernel/traps_64-xen.c
++++ b/arch/x86/kernel/traps_64-xen.c
+@@ -74,38 +74,41 @@ asmlinkage void alignment_check(void);
+ asmlinkage void machine_check(void);
+ asmlinkage void spurious_interrupt_bug(void);
+
++static unsigned int code_bytes = 64;
++
+ static inline void conditional_sti(struct pt_regs *regs)
+ {
+- if (regs->eflags & X86_EFLAGS_IF)
++ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
+ }
+
+ static inline void preempt_conditional_sti(struct pt_regs *regs)
+ {
+- preempt_disable();
+- if (regs->eflags & X86_EFLAGS_IF)
++ inc_preempt_count();
++ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_enable();
+ }
+
+ static inline void preempt_conditional_cli(struct pt_regs *regs)
+ {
+- if (regs->eflags & X86_EFLAGS_IF)
++ if (regs->flags & X86_EFLAGS_IF)
+ local_irq_disable();
+ /* Make sure to not schedule here because we could be running
+ on an exception stack. */
+- preempt_enable_no_resched();
++ dec_preempt_count();
+ }
+
+ int kstack_depth_to_print = 12;
+
+-#ifdef CONFIG_KALLSYMS
+-void printk_address(unsigned long address)
++void printk_address(unsigned long address, int reliable)
+ {
++#ifdef CONFIG_KALLSYMS
+ unsigned long offset = 0, symsize;
+ const char *symname;
+ char *modname;
+ char *delim = ":";
+- char namebuf[128];
++ char namebuf[KSYM_NAME_LEN];
++ char reliab[4] = "";
+
+ symname = kallsyms_lookup(address, &symsize, &offset,
+ &modname, namebuf);
+@@ -113,17 +116,17 @@ void printk_address(unsigned long addres
+ printk(" [<%016lx>]\n", address);
+ return;
+ }
++ if (!reliable)
++ strcpy(reliab, "? ");
++
+ if (!modname)
+- modname = delim = "";
+- printk(" [<%016lx>] %s%s%s%s+0x%lx/0x%lx\n",
+- address, delim, modname, delim, symname, offset, symsize);
+-}
++ modname = delim = "";
++ printk(" [<%016lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
++ address, reliab, delim, modname, delim, symname, offset, symsize);
+ #else
+-void printk_address(unsigned long address)
+-{
+ printk(" [<%016lx>]\n", address);
+-}
+ #endif
++}
+
+ static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
+ unsigned *usedp, char **idp)
+@@ -210,14 +213,53 @@ static unsigned long *in_exception_stack
+ * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
+ */
+
+-static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
++static inline int valid_stack_ptr(struct thread_info *tinfo,
++ void *p, unsigned int size, void *end)
+ {
+- void *t = (void *)tinfo;
+- return p > t && p < t + THREAD_SIZE - 3;
++ void *t = tinfo;
++ if (end) {
++ if (p < end && p >= (end-THREAD_SIZE))
++ return 1;
++ else
++ return 0;
++ }
++ return p > t && p < t + THREAD_SIZE - size;
++}
++
++/* The form of the top of the frame on the stack */
++struct stack_frame {
++ struct stack_frame *next_frame;
++ unsigned long return_address;
++};
++
++
++static inline unsigned long print_context_stack(struct thread_info *tinfo,
++ unsigned long *stack, unsigned long bp,
++ const struct stacktrace_ops *ops, void *data,
++ unsigned long *end)
++{
++ struct stack_frame *frame = (struct stack_frame *)bp;
++
++ while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
++ unsigned long addr;
++
++ addr = *stack;
++ if (__kernel_text_address(addr)) {
++ if ((unsigned long) stack == bp + 8) {
++ ops->address(data, addr, 1);
++ frame = frame->next_frame;
++ bp = (unsigned long) frame;
++ } else {
++ ops->address(data, addr, bp == 0);
++ }
++ }
++ stack++;
++ }
++ return bp;
+ }
+
+ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
+- unsigned long *stack,
++ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+ {
+ const unsigned cpu = get_cpu();
+@@ -227,36 +269,28 @@ void dump_trace(struct task_struct *tsk,
+
+ if (!tsk)
+ tsk = current;
++ tinfo = task_thread_info(tsk);
+
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+ if (tsk && tsk != current)
+- stack = (unsigned long *)tsk->thread.rsp;
++ stack = (unsigned long *)tsk->thread.sp;
+ }
+
+- /*
+- * Print function call entries within a stack. 'cond' is the
+- * "end of stackframe" condition, that the 'stack++'
+- * iteration will eventually trigger.
+- */
+-#define HANDLE_STACK(cond) \
+- do while (cond) { \
+- unsigned long addr = *stack++; \
+- /* Use unlocked access here because except for NMIs \
+- we should be already protected against module unloads */ \
+- if (__kernel_text_address(addr)) { \
+- /* \
+- * If the address is either in the text segment of the \
+- * kernel, or in the region which contains vmalloc'ed \
+- * memory, it *may* be the address of a calling \
+- * routine; if so, print it so that someone tracing \
+- * down the cause of the crash will be able to figure \
+- * out the call path that was taken. \
+- */ \
+- ops->address(data, addr); \
+- } \
+- } while (0)
++#ifdef CONFIG_FRAME_POINTER
++ if (!bp) {
++ if (tsk == current) {
++ /* Grab bp right from our regs */
++ asm("movq %%rbp, %0" : "=r" (bp):);
++ } else {
++ /* bp is the last reg pushed by switch_to */
++ bp = *(unsigned long *) tsk->thread.sp;
++ }
++ }
++#endif
++
++
+
+ /*
+ * Print function call entries in all stacks, starting at the
+@@ -272,7 +306,9 @@ void dump_trace(struct task_struct *tsk,
+ if (estack_end) {
+ if (ops->stack(data, id) < 0)
+ break;
+- HANDLE_STACK (stack < estack_end);
++
++ bp = print_context_stack(tinfo, stack, bp, ops,
++ data, estack_end);
+ ops->stack(data, "<EOE>");
+ /*
+ * We link to the next stack via the
+@@ -290,7 +326,8 @@ void dump_trace(struct task_struct *tsk,
+ if (stack >= irqstack && stack < irqstack_end) {
+ if (ops->stack(data, "IRQ") < 0)
+ break;
+- HANDLE_STACK (stack < irqstack_end);
++ bp = print_context_stack(tinfo, stack, bp,
++ ops, data, irqstack_end);
+ /*
+ * We link to the next stack (which would be
+ * the process stack normally) the last
+@@ -308,9 +345,7 @@ void dump_trace(struct task_struct *tsk,
+ /*
+ * This handles the process stack:
+ */
+- tinfo = task_thread_info(tsk);
+- HANDLE_STACK (valid_stack_ptr(tinfo, stack));
+-#undef HANDLE_STACK
++ bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
+ put_cpu();
+ }
+ EXPORT_SYMBOL(dump_trace);
+@@ -333,10 +368,10 @@ static int print_trace_stack(void *data,
+ return 0;
+ }
+
+-static void print_trace_address(void *data, unsigned long addr)
++static void print_trace_address(void *data, unsigned long addr, int reliable)
+ {
+ touch_nmi_watchdog();
+- printk_address(addr);
++ printk_address(addr, reliable);
+ }
+
+ static const struct stacktrace_ops print_trace_ops = {
+@@ -347,15 +382,17 @@ static const struct stacktrace_ops print
+ };
+
+ void
+-show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long *stack)
++show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long *stack,
++ unsigned long bp)
+ {
+ printk("\nCall Trace:\n");
+- dump_trace(tsk, regs, stack, &print_trace_ops, NULL);
++ dump_trace(tsk, regs, stack, bp, &print_trace_ops, NULL);
+ printk("\n");
+ }
+
+ static void
+-_show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *rsp)
++_show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *sp,
++ unsigned long bp)
+ {
+ unsigned long *stack;
+ int i;
+@@ -366,14 +403,14 @@ _show_stack(struct task_struct *tsk, str
+ // debugging aid: "show_stack(NULL, NULL);" prints the
+ // back trace for this cpu.
+
+- if (rsp == NULL) {
++ if (sp == NULL) {
+ if (tsk)
+- rsp = (unsigned long *)tsk->thread.rsp;
++ sp = (unsigned long *)tsk->thread.sp;
+ else
+- rsp = (unsigned long *)&rsp;
++ sp = (unsigned long *)&sp;
+ }
+
+- stack = rsp;
++ stack = sp;
+ for(i=0; i < kstack_depth_to_print; i++) {
+ if (stack >= irqstack && stack <= irqstack_end) {
+ if (stack == irqstack_end) {
+@@ -389,12 +426,12 @@ _show_stack(struct task_struct *tsk, str
+ printk(" %016lx", *stack++);
+ touch_nmi_watchdog();
+ }
+- show_trace(tsk, regs, rsp);
++ show_trace(tsk, regs, sp, bp);
+ }
+
+-void show_stack(struct task_struct *tsk, unsigned long * rsp)
++void show_stack(struct task_struct *tsk, unsigned long * sp)
+ {
+- _show_stack(tsk, NULL, rsp);
++ _show_stack(tsk, NULL, sp, 0);
+ }
+
+ /*
+@@ -403,13 +440,19 @@ void show_stack(struct task_struct *tsk,
+ void dump_stack(void)
+ {
+ unsigned long dummy;
++ unsigned long bp = 0;
++
++#ifdef CONFIG_FRAME_POINTER
++ if (!bp)
++ asm("movq %%rbp, %0" : "=r" (bp):);
++#endif
+
+ printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+ current->pid, current->comm, print_tainted(),
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+- show_trace(NULL, NULL, &dummy);
++ show_trace(NULL, NULL, &dummy, bp);
+ }
+
+ EXPORT_SYMBOL(dump_stack);
+@@ -417,12 +460,15 @@ EXPORT_SYMBOL(dump_stack);
+ void show_registers(struct pt_regs *regs)
+ {
+ int i;
+- int in_kernel = !user_mode(regs);
+- unsigned long rsp;
++ unsigned long sp;
+ const int cpu = smp_processor_id();
+ struct task_struct *cur = cpu_pda(cpu)->pcurrent;
++ u8 *ip;
++ unsigned int code_prologue = code_bytes * 43 / 64;
++ unsigned int code_len = code_bytes;
+
+- rsp = regs->rsp;
++ sp = regs->sp;
++ ip = (u8 *) regs->ip - code_prologue;
+ printk("CPU %d ", cpu);
+ __show_regs(regs);
+ printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
+@@ -432,45 +478,43 @@ void show_registers(struct pt_regs *regs
+ * When in-kernel, we also print out the stack and code at the
+ * time of the fault..
+ */
+- if (in_kernel) {
++ if (!user_mode(regs)) {
++ unsigned char c;
+ printk("Stack: ");
+- _show_stack(NULL, regs, (unsigned long*)rsp);
++ _show_stack(NULL, regs, (unsigned long *)sp, regs->bp);
++ printk("\n");
+
+- printk("\nCode: ");
+- if (regs->rip < PAGE_OFFSET)
+- goto bad;
+-
+- for (i=0; i<20; i++) {
+- unsigned char c;
+- if (__get_user(c, &((unsigned char*)regs->rip)[i])) {
+-bad:
++ printk(KERN_EMERG "Code: ");
++ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
++ /* try starting at RIP */
++ ip = (u8 *) regs->ip;
++ code_len = code_len - code_prologue + 1;
++ }
++ for (i = 0; i < code_len; i++, ip++) {
++ if (ip < (u8 *)PAGE_OFFSET ||
++ probe_kernel_address(ip, c)) {
+ printk(" Bad RIP value.");
+ break;
+ }
+- printk("%02x ", c);
++ if (ip == (u8 *)regs->ip)
++ printk("<%02x> ", c);
++ else
++ printk("%02x ", c);
+ }
+ }
+ printk("\n");
+ }
+
+-int is_valid_bugaddr(unsigned long rip)
++int is_valid_bugaddr(unsigned long ip)
+ {
+ unsigned short ud2;
+
+- if (__copy_from_user(&ud2, (const void __user *) rip, sizeof(ud2)))
++ if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
+ return 0;
+
+ return ud2 == 0x0b0f;
+ }
+
+-#ifdef CONFIG_BUG
+-void out_of_line_bug(void)
+-{
+- BUG();
+-}
+-EXPORT_SYMBOL(out_of_line_bug);
+-#endif
+-
+ static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+ static int die_owner = -1;
+ static unsigned int die_nest_count;
+@@ -498,7 +542,7 @@ unsigned __kprobes long oops_begin(void)
+ return flags;
+ }
+
+-void __kprobes oops_end(unsigned long flags)
++void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+ {
+ die_owner = -1;
+ bust_spinlocks(0);
+@@ -507,12 +551,17 @@ void __kprobes oops_end(unsigned long fl
+ /* Nest count reaches zero, release the lock. */
+ __raw_spin_unlock(&die_lock);
+ raw_local_irq_restore(flags);
++ if (!regs) {
++ oops_exit();
++ return;
++ }
+ if (panic_on_oops)
+ panic("Fatal exception");
+ oops_exit();
++ do_exit(signr);
+ }
+
+-void __kprobes __die(const char * str, struct pt_regs * regs, long err)
++int __kprobes __die(const char * str, struct pt_regs * regs, long err)
+ {
+ static int die_counter;
+ printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff,++die_counter);
+@@ -526,15 +575,17 @@ void __kprobes __die(const char * str, s
+ printk("DEBUG_PAGEALLOC");
+ #endif
+ printk("\n");
+- notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV);
++ if (notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
++ return 1;
+ show_registers(regs);
+ add_taint(TAINT_DIE);
+ /* Executive summary in case the oops scrolled away */
+ printk(KERN_ALERT "RIP ");
+- printk_address(regs->rip);
+- printk(" RSP <%016lx>\n", regs->rsp);
++ printk_address(regs->ip, 1);
++ printk(" RSP <%016lx>\n", regs->sp);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
++ return 0;
+ }
+
+ void die(const char * str, struct pt_regs * regs, long err)
+@@ -542,11 +593,11 @@ void die(const char * str, struct pt_reg
+ unsigned long flags = oops_begin();
+
+ if (!user_mode(regs))
+- report_bug(regs->rip, regs);
++ report_bug(regs->ip, regs);
+
+- __die(str, regs, err);
+- oops_end(flags);
+- do_exit(SIGSEGV);
++ if (__die(str, regs, err))
++ regs = NULL;
++ oops_end(flags, regs, SIGSEGV);
+ }
+
+ #if defined(CONFIG_X86_LOCAL_APIC) || defined(CONFIG_SYSCTL)
+@@ -564,10 +615,10 @@ void __kprobes die_nmi(char *str, struct
+ crash_kexec(regs);
+ if (do_panic || panic_on_oops)
+ panic("Non maskable interrupt");
+- oops_end(flags);
++ oops_end(flags, NULL, SIGBUS);
+ nmi_exit();
+ local_irq_enable();
+- do_exit(SIGSEGV);
++ do_exit(SIGBUS);
+ }
+ #endif
+
+@@ -592,11 +643,14 @@ static void __kprobes do_trap(int trapnr
+ tsk->thread.trap_no = trapnr;
+
+ if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
+- printk_ratelimit())
++ printk_ratelimit()) {
+ printk(KERN_INFO
+- "%s[%d] trap %s rip:%lx rsp:%lx error:%lx\n",
++ "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
+ tsk->comm, tsk->pid, str,
+- regs->rip, regs->rsp, error_code);
++ regs->ip, regs->sp, error_code);
++ print_vma_addr(" in ", regs->ip);
++ printk("\n");
++ }
+
+ if (info)
+ force_sig_info(signr, info, tsk);
+@@ -606,19 +660,12 @@ static void __kprobes do_trap(int trapnr
+ }
+
+
+- /* kernel trap */
+- {
+- const struct exception_table_entry *fixup;
+- fixup = search_exception_tables(regs->rip);
+- if (fixup)
+- regs->rip = fixup->fixup;
+- else {
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = trapnr;
+- die(str, regs, error_code);
+- }
+- return;
++ if (!fixup_exception(regs)) {
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
++ die(str, regs, error_code);
+ }
++ return;
+ }
+
+ #define DO_ERROR(trapnr, signr, str, name) \
+@@ -647,10 +694,10 @@ asmlinkage void do_##name(struct pt_regs
+ do_trap(trapnr, signr, str, regs, error_code, &info); \
+ }
+
+-DO_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->rip)
++DO_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+ DO_ERROR( 4, SIGSEGV, "overflow", overflow)
+ DO_ERROR( 5, SIGSEGV, "bounds", bounds)
+-DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->rip)
++DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
+ DO_ERROR( 7, SIGSEGV, "device not available", device_not_available)
+ DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
+ DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
+@@ -698,32 +745,28 @@ asmlinkage void __kprobes do_general_pro
+ tsk->thread.trap_no = 13;
+
+ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+- printk_ratelimit())
++ printk_ratelimit()) {
+ printk(KERN_INFO
+- "%s[%d] general protection rip:%lx rsp:%lx error:%lx\n",
++ "%s[%d] general protection ip:%lx sp:%lx error:%lx",
+ tsk->comm, tsk->pid,
+- regs->rip, regs->rsp, error_code);
++ regs->ip, regs->sp, error_code);
++ print_vma_addr(" in ", regs->ip);
++ printk("\n");
++ }
+
+ force_sig(SIGSEGV, tsk);
+ return;
+ }
+
+- /* kernel gp */
+- {
+- const struct exception_table_entry *fixup;
+- fixup = search_exception_tables(regs->rip);
+- if (fixup) {
+- regs->rip = fixup->fixup;
+- return;
+- }
++ if (fixup_exception(regs))
++ return;
+
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = 13;
+- if (notify_die(DIE_GPF, "general protection fault", regs,
+- error_code, 13, SIGSEGV) == NOTIFY_STOP)
+- return;
+- die("general protection fault", regs, error_code);
+- }
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 13;
++ if (notify_die(DIE_GPF, "general protection fault", regs,
++ error_code, 13, SIGSEGV) == NOTIFY_STOP)
++ return;
++ die("general protection fault", regs, error_code);
+ }
+
+ static __kprobes void
+@@ -833,15 +876,15 @@ asmlinkage __kprobes struct pt_regs *syn
+ {
+ struct pt_regs *regs = eregs;
+ /* Did already sync */
+- if (eregs == (struct pt_regs *)eregs->rsp)
++ if (eregs == (struct pt_regs *)eregs->sp)
+ ;
+ /* Exception from user space */
+ else if (user_mode(eregs))
+ regs = task_pt_regs(current);
+ /* Exception from kernel and interrupts are enabled. Move to
+ kernel process stack. */
+- else if (eregs->eflags & X86_EFLAGS_IF)
+- regs = (struct pt_regs *)(eregs->rsp -= sizeof(struct pt_regs));
++ else if (eregs->flags & X86_EFLAGS_IF)
++ regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
+ if (eregs != regs)
+ *regs = *eregs;
+ return regs;
+@@ -859,6 +902,12 @@ asmlinkage void __kprobes do_debug(struc
+
+ get_debugreg(condition, 6);
+
++ /*
++ * The processor cleared BTF, so don't mark that we need it set.
++ */
++ clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
++ tsk->thread.debugctlmsr = 0;
++
+ if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
+ SIGTRAP) == NOTIFY_STOP)
+ return;
+@@ -874,27 +923,14 @@ asmlinkage void __kprobes do_debug(struc
+
+ tsk->thread.debugreg6 = condition;
+
+- /* Mask out spurious TF errors due to lazy TF clearing */
++
++ /*
++ * Single-stepping through TF: make sure we ignore any events in
++ * kernel space (but re-enable TF when returning to user mode).
++ */
+ if (condition & DR_STEP) {
+- /*
+- * The TF error should be masked out only if the current
+- * process is not traced and if the TRAP flag has been set
+- * previously by a tracing process (condition detected by
+- * the PT_DTRACE flag); remember that the i386 TRAP flag
+- * can be modified by the process itself in user mode,
+- * allowing programs to debug themselves without the ptrace()
+- * interface.
+- */
+ if (!user_mode(regs))
+ goto clear_TF_reenable;
+- /*
+- * Was the TF flag set by a debugger? If so, clear it now,
+- * so that register information is correct.
+- */
+- if (tsk->ptrace & PT_DTRACE) {
+- regs->eflags &= ~TF_MASK;
+- tsk->ptrace &= ~PT_DTRACE;
+- }
+ }
+
+ /* Ok, finally something we can handle */
+@@ -903,7 +939,7 @@ asmlinkage void __kprobes do_debug(struc
+ info.si_signo = SIGTRAP;
+ info.si_errno = 0;
+ info.si_code = TRAP_BRKPT;
+- info.si_addr = user_mode(regs) ? (void __user *)regs->rip : NULL;
++ info.si_addr = user_mode(regs) ? (void __user *)regs->ip : NULL;
+ force_sig_info(SIGTRAP, &info, tsk);
+
+ clear_dr7:
+@@ -913,18 +949,15 @@ clear_dr7:
+
+ clear_TF_reenable:
+ set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
+- regs->eflags &= ~TF_MASK;
++ regs->flags &= ~X86_EFLAGS_TF;
+ preempt_conditional_cli(regs);
+ }
+
+ static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
+ {
+- const struct exception_table_entry *fixup;
+- fixup = search_exception_tables(regs->rip);
+- if (fixup) {
+- regs->rip = fixup->fixup;
++ if (fixup_exception(regs))
+ return 1;
+- }
++
+ notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
+ /* Illegal floating point operation in the kernel */
+ current->thread.trap_no = trapnr;
+@@ -939,7 +972,7 @@ static int kernel_math_error(struct pt_r
+ */
+ asmlinkage void do_coprocessor_error(struct pt_regs *regs)
+ {
+- void __user *rip = (void __user *)(regs->rip);
++ void __user *ip = (void __user *)(regs->ip);
+ struct task_struct * task;
+ siginfo_t info;
+ unsigned short cwd, swd;
+@@ -959,7 +992,7 @@ asmlinkage void do_coprocessor_error(str
+ info.si_signo = SIGFPE;
+ info.si_errno = 0;
+ info.si_code = __SI_FAULT;
+- info.si_addr = rip;
++ info.si_addr = ip;
+ /*
+ * (~cwd & swd) will mask out exceptions that are not set to unmasked
+ * status. 0x3f is the exception bits in these regs, 0x200 is the
+@@ -1008,7 +1041,7 @@ asmlinkage void bad_intr(void)
+
+ asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
+ {
+- void __user *rip = (void __user *)(regs->rip);
++ void __user *ip = (void __user *)(regs->ip);
+ struct task_struct * task;
+ siginfo_t info;
+ unsigned short mxcsr;
+@@ -1028,7 +1061,7 @@ asmlinkage void do_simd_coprocessor_erro
+ info.si_signo = SIGFPE;
+ info.si_errno = 0;
+ info.si_code = __SI_FAULT;
+- info.si_addr = rip;
++ info.si_addr = ip;
+ /*
+ * The SIMD FPU exceptions are handled a little differently, as there
+ * is only a single status/control register. Thus, to determine which
+@@ -1092,13 +1125,14 @@ asmlinkage void math_state_restore(void)
+ task_thread_info(me)->status |= TS_USEDFPU;
+ me->fpu_counter++;
+ }
++EXPORT_SYMBOL_GPL(math_state_restore);
+
+
+ /*
+ * NB. All these are "interrupt gates" (i.e. events_mask is set) because we
+ * specify <dpl>|4 in the second field.
+ */
+-static trap_info_t __cpuinitdata trap_table[] = {
++static const trap_info_t __cpuinitconst trap_table[] = {
+ { 0, 0|4, __KERNEL_CS, (unsigned long)divide_error },
+ { 1, 0|4, __KERNEL_CS, (unsigned long)debug },
+ { 3, 3|4, __KERNEL_CS, (unsigned long)int3 },
+@@ -1169,3 +1203,14 @@ static int __init kstack_setup(char *s)
+ return 0;
+ }
+ early_param("kstack", kstack_setup);
++
++
++static int __init code_bytes_setup(char *s)
++{
++ code_bytes = simple_strtoul(s, NULL, 0);
++ if (code_bytes > 8192)
++ code_bytes = 8192;
++
++ return 1;
++}
++__setup("code_bytes=", code_bytes_setup);
+--- a/arch/x86/kernel/vsyscall_64-xen.c
++++ b/arch/x86/kernel/vsyscall_64-xen.c
+@@ -43,12 +43,7 @@
+ #include <asm/vgtod.h>
+
+ #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
+-#define __syscall_clobber "r11","rcx","memory"
+-#define __pa_vsymbol(x) \
+- ({unsigned long v; \
+- extern char __vsyscall_0; \
+- asm("" : "=r" (v) : "0" (x)); \
+- ((v - VSYSCALL_START) + __pa_symbol(&__vsyscall_0)); })
++#define __syscall_clobber "r11","cx","memory"
+
+ /*
+ * vsyscall_gtod_data contains data that is :
+@@ -102,7 +97,7 @@ static __always_inline void do_get_tz(st
+ static __always_inline int gettimeofday(struct timeval *tv, struct timezone *tz)
+ {
+ int ret;
+- asm volatile("vsysc2: syscall"
++ asm volatile("syscall"
+ : "=a" (ret)
+ : "0" (__NR_gettimeofday),"D" (tv),"S" (tz)
+ : __syscall_clobber );
+@@ -112,7 +107,7 @@ static __always_inline int gettimeofday(
+ static __always_inline long time_syscall(long *t)
+ {
+ long secs;
+- asm volatile("vsysc1: syscall"
++ asm volatile("syscall"
+ : "=a" (secs)
+ : "0" (__NR_time),"D" (t) : __syscall_clobber);
+ return secs;
+@@ -190,7 +185,7 @@ time_t __vsyscall(1) vtime(time_t *t)
+ long __vsyscall(2)
+ vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
+ {
+- unsigned int dummy, p;
++ unsigned int p;
+ unsigned long j = 0;
+
+ /* Fast cache - only recompute value once per jiffies and avoid
+@@ -205,7 +200,7 @@ vgetcpu(unsigned *cpu, unsigned *node, s
+ p = tcache->blob[1];
+ } else if (__vgetcpu_mode == VGETCPU_RDTSCP) {
+ /* Load per CPU data from RDTSCP */
+- rdtscp(dummy, dummy, p);
++ native_read_tscp(&p);
+ } else {
+ /* Load per CPU data from GDT */
+ asm("lsl %1,%0" : "=r" (p) : "r" (__PER_CPU_SEG));
+@@ -228,42 +223,11 @@ long __vsyscall(3) venosys_1(void)
+
+ #ifdef CONFIG_SYSCTL
+
+-#define SYSCALL 0x050f
+-#define NOP2 0x9090
+-
+-/*
+- * NOP out syscall in vsyscall page when not needed.
+- */
+-static int vsyscall_sysctl_change(ctl_table *ctl, int write, struct file * filp,
+- void __user *buffer, size_t *lenp, loff_t *ppos)
++static int
++vsyscall_sysctl_change(ctl_table *ctl, int write, struct file * filp,
++ void __user *buffer, size_t *lenp, loff_t *ppos)
+ {
+- extern u16 vsysc1, vsysc2;
+- u16 __iomem *map1;
+- u16 __iomem *map2;
+- int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+- if (!write)
+- return ret;
+- /* gcc has some trouble with __va(__pa()), so just do it this
+- way. */
+- map1 = ioremap(__pa_vsymbol(&vsysc1), 2);
+- if (!map1)
+- return -ENOMEM;
+- map2 = ioremap(__pa_vsymbol(&vsysc2), 2);
+- if (!map2) {
+- ret = -ENOMEM;
+- goto out;
+- }
+- if (!vsyscall_gtod_data.sysctl_enabled) {
+- writew(SYSCALL, map1);
+- writew(SYSCALL, map2);
+- } else {
+- writew(NOP2, map1);
+- writew(NOP2, map2);
+- }
+- iounmap(map2);
+-out:
+- iounmap(map1);
+- return ret;
++ return proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+ }
+
+ static ctl_table kernel_table2[] = {
+@@ -279,7 +243,6 @@ static ctl_table kernel_root_table2[] =
+ .child = kernel_table2 },
+ {}
+ };
+-
+ #endif
+
+ /* Assume __initcall executes before all user space. Hopefully kmod
+@@ -301,7 +264,7 @@ static void __cpuinit vsyscall_set_cpu(i
+ d |= cpu;
+ d |= (node & 0xf) << 12;
+ d |= (node >> 4) << 48;
+- if (HYPERVISOR_update_descriptor(virt_to_machine(cpu_gdt(cpu)
++ if (HYPERVISOR_update_descriptor(virt_to_machine(get_cpu_gdt_table(cpu)
+ + GDT_ENTRY_PER_CPU),
+ d))
+ BUG();
+@@ -322,7 +285,7 @@ cpu_vsyscall_notifier(struct notifier_bl
+ return NOTIFY_DONE;
+ }
+
+-static void __init map_vsyscall(void)
++void __init map_vsyscall(void)
+ {
+ extern char __vsyscall_0;
+ unsigned long physaddr_page0 = __pa_symbol(&__vsyscall_0);
+@@ -338,7 +301,6 @@ static int __init vsyscall_init(void)
+ BUG_ON((unsigned long) &vtime != VSYSCALL_ADDR(__NR_vtime));
+ BUG_ON((VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE)));
+ BUG_ON((unsigned long) &vgetcpu != VSYSCALL_ADDR(__NR_vgetcpu));
+- map_vsyscall();
+ #ifdef CONFIG_XEN
+ vsyscall_gtod_data.sysctl_enabled = 0; /* disable vgettimeofay() */
+ if (boot_cpu_has(X86_FEATURE_RDTSCP))
+--- a/arch/x86/kernel/xen_entry_64.S
++++ /dev/null
+@@ -1,36 +0,0 @@
+-/*
+- * Copied from arch/xen/i386/kernel/entry.S
+- */
+-/* Offsets into shared_info_t. */
+-#define evtchn_upcall_pending /* 0 */
+-#define evtchn_upcall_mask 1
+-
+-#define sizeof_vcpu_shift 6
+-
+-#ifdef CONFIG_SMP
+-//#define preempt_disable(reg) incl threadinfo_preempt_count(reg)
+-//#define preempt_enable(reg) decl threadinfo_preempt_count(reg)
+-#define preempt_disable(reg)
+-#define preempt_enable(reg)
+-#define XEN_GET_VCPU_INFO(reg) preempt_disable(%rbp) ; \
+- movq %gs:pda_cpunumber,reg ; \
+- shl $32, reg ; \
+- shr $32-sizeof_vcpu_shift,reg ; \
+- addq HYPERVISOR_shared_info,reg
+-#define XEN_PUT_VCPU_INFO(reg) preempt_enable(%rbp) ; \
+-#define XEN_PUT_VCPU_INFO_fixup .byte 0xff,0xff,0xff
+-#else
+-#define XEN_GET_VCPU_INFO(reg) movq HYPERVISOR_shared_info,reg
+-#define XEN_PUT_VCPU_INFO(reg)
+-#define XEN_PUT_VCPU_INFO_fixup
+-#endif
+-
+-#define XEN_LOCKED_BLOCK_EVENTS(reg) movb $1,evtchn_upcall_mask(reg)
+-#define XEN_LOCKED_UNBLOCK_EVENTS(reg) movb $0,evtchn_upcall_mask(reg)
+-#define XEN_BLOCK_EVENTS(reg) XEN_GET_VCPU_INFO(reg) ; \
+- XEN_LOCKED_BLOCK_EVENTS(reg) ; \
+- XEN_PUT_VCPU_INFO(reg)
+-#define XEN_UNBLOCK_EVENTS(reg) XEN_GET_VCPU_INFO(reg) ; \
+- XEN_LOCKED_UNBLOCK_EVENTS(reg) ; \
+- XEN_PUT_VCPU_INFO(reg)
+-#define XEN_TEST_PENDING(reg) testb $0xFF,evtchn_upcall_pending(reg)
+--- a/arch/x86/mach-xen/setup.c
++++ b/arch/x86/mach-xen/setup.c
+@@ -161,15 +161,12 @@ void __init machine_specific_arch_setup(
+
+ /* Do an early initialization of the fixmap area */
+ {
+- extern pte_t swapper_pg_pmd[PTRS_PER_PTE];
++ extern pte_t swapper_pg_fixmap[PTRS_PER_PTE];
+ unsigned long addr = __fix_to_virt(FIX_EARLYCON_MEM_BASE);
+- pgd_t *pgd = (pgd_t *)xen_start_info->pt_base;
+- pud_t *pud = pud_offset(pgd + pgd_index(addr), addr);
++ pud_t *pud = pud_offset(swapper_pg_dir + pgd_index(addr), addr);
+ pmd_t *pmd = pmd_offset(pud, addr);
+
+- swapper_pg_dir = pgd;
+- init_mm.pgd = pgd;
+- make_lowmem_page_readonly(swapper_pg_pmd, XENFEAT_writable_page_tables);
+- set_pmd(pmd, __pmd(__pa_symbol(swapper_pg_pmd) | _PAGE_TABLE));
++ make_lowmem_page_readonly(swapper_pg_fixmap, XENFEAT_writable_page_tables);
++ set_pmd(pmd, __pmd(__pa_symbol(swapper_pg_fixmap) | _PAGE_TABLE));
+ }
+ }
+--- a/arch/x86/mm/fault_32-xen.c
++++ /dev/null
+@@ -1,757 +0,0 @@
+-/*
+- * linux/arch/i386/mm/fault.c
+- *
+- * Copyright (C) 1995 Linus Torvalds
+- */
+-
+-#include <linux/signal.h>
+-#include <linux/sched.h>
+-#include <linux/kernel.h>
+-#include <linux/errno.h>
+-#include <linux/string.h>
+-#include <linux/types.h>
+-#include <linux/ptrace.h>
+-#include <linux/mman.h>
+-#include <linux/mm.h>
+-#include <linux/smp.h>
+-#include <linux/interrupt.h>
+-#include <linux/init.h>
+-#include <linux/tty.h>
+-#include <linux/vt_kern.h> /* For unblank_screen() */
+-#include <linux/highmem.h>
+-#include <linux/bootmem.h> /* for max_low_pfn */
+-#include <linux/vmalloc.h>
+-#include <linux/module.h>
+-#include <linux/kprobes.h>
+-#include <linux/uaccess.h>
+-#include <linux/kdebug.h>
+-#include <linux/kprobes.h>
+-
+-#include <asm/system.h>
+-#include <asm/desc.h>
+-#include <asm/segment.h>
+-
+-extern void die(const char *,struct pt_regs *,long);
+-
+-#ifdef CONFIG_KPROBES
+-static inline int notify_page_fault(struct pt_regs *regs)
+-{
+- int ret = 0;
+-
+- /* kprobe_running() needs smp_processor_id() */
+- if (!user_mode_vm(regs)) {
+- preempt_disable();
+- if (kprobe_running() && kprobe_fault_handler(regs, 14))
+- ret = 1;
+- preempt_enable();
+- }
+-
+- return ret;
+-}
+-#else
+-static inline int notify_page_fault(struct pt_regs *regs)
+-{
+- return 0;
+-}
+-#endif
+-
+-/*
+- * Return EIP plus the CS segment base. The segment limit is also
+- * adjusted, clamped to the kernel/user address space (whichever is
+- * appropriate), and returned in *eip_limit.
+- *
+- * The segment is checked, because it might have been changed by another
+- * task between the original faulting instruction and here.
+- *
+- * If CS is no longer a valid code segment, or if EIP is beyond the
+- * limit, or if it is a kernel address when CS is not a kernel segment,
+- * then the returned value will be greater than *eip_limit.
+- *
+- * This is slow, but is very rarely executed.
+- */
+-static inline unsigned long get_segment_eip(struct pt_regs *regs,
+- unsigned long *eip_limit)
+-{
+- unsigned long eip = regs->eip;
+- unsigned seg = regs->xcs & 0xffff;
+- u32 seg_ar, seg_limit, base, *desc;
+-
+- /* Unlikely, but must come before segment checks. */
+- if (unlikely(regs->eflags & VM_MASK)) {
+- base = seg << 4;
+- *eip_limit = base + 0xffff;
+- return base + (eip & 0xffff);
+- }
+-
+- /* The standard kernel/user address space limit. */
+- *eip_limit = user_mode(regs) ? USER_DS.seg : KERNEL_DS.seg;
+-
+- /* By far the most common cases. */
+- if (likely(SEGMENT_IS_FLAT_CODE(seg)))
+- return eip;
+-
+- /* Check the segment exists, is within the current LDT/GDT size,
+- that kernel/user (ring 0..3) has the appropriate privilege,
+- that it's a code segment, and get the limit. */
+- __asm__ ("larl %3,%0; lsll %3,%1"
+- : "=&r" (seg_ar), "=r" (seg_limit) : "0" (0), "rm" (seg));
+- if ((~seg_ar & 0x9800) || eip > seg_limit) {
+- *eip_limit = 0;
+- return 1; /* So that returned eip > *eip_limit. */
+- }
+-
+- /* Get the GDT/LDT descriptor base.
+- When you look for races in this code remember that
+- LDT and other horrors are only used in user space. */
+- if (seg & (1<<2)) {
+- /* Must lock the LDT while reading it. */
+- mutex_lock(¤t->mm->context.lock);
+- desc = current->mm->context.ldt;
+- desc = (void *)desc + (seg & ~7);
+- } else {
+- /* Must disable preemption while reading the GDT. */
+- desc = (u32 *)get_cpu_gdt_table(get_cpu());
+- desc = (void *)desc + (seg & ~7);
+- }
+-
+- /* Decode the code segment base from the descriptor */
+- base = get_desc_base((unsigned long *)desc);
+-
+- if (seg & (1<<2)) {
+- mutex_unlock(¤t->mm->context.lock);
+- } else
+- put_cpu();
+-
+- /* Adjust EIP and segment limit, and clamp at the kernel limit.
+- It's legitimate for segments to wrap at 0xffffffff. */
+- seg_limit += base;
+- if (seg_limit < *eip_limit && seg_limit >= base)
+- *eip_limit = seg_limit;
+- return eip + base;
+-}
+-
+-/*
+- * Sometimes AMD Athlon/Opteron CPUs report invalid exceptions on prefetch.
+- * Check that here and ignore it.
+- */
+-static int __is_prefetch(struct pt_regs *regs, unsigned long addr)
+-{
+- unsigned long limit;
+- unsigned char *instr = (unsigned char *)get_segment_eip (regs, &limit);
+- int scan_more = 1;
+- int prefetch = 0;
+- int i;
+-
+- for (i = 0; scan_more && i < 15; i++) {
+- unsigned char opcode;
+- unsigned char instr_hi;
+- unsigned char instr_lo;
+-
+- if (instr > (unsigned char *)limit)
+- break;
+- if (probe_kernel_address(instr, opcode))
+- break;
+-
+- instr_hi = opcode & 0xf0;
+- instr_lo = opcode & 0x0f;
+- instr++;
+-
+- switch (instr_hi) {
+- case 0x20:
+- case 0x30:
+- /* Values 0x26,0x2E,0x36,0x3E are valid x86 prefixes. */
+- scan_more = ((instr_lo & 7) == 0x6);
+- break;
+-
+- case 0x60:
+- /* 0x64 thru 0x67 are valid prefixes in all modes. */
+- scan_more = (instr_lo & 0xC) == 0x4;
+- break;
+- case 0xF0:
+- /* 0xF0, 0xF2, and 0xF3 are valid prefixes */
+- scan_more = !instr_lo || (instr_lo>>1) == 1;
+- break;
+- case 0x00:
+- /* Prefetch instruction is 0x0F0D or 0x0F18 */
+- scan_more = 0;
+- if (instr > (unsigned char *)limit)
+- break;
+- if (probe_kernel_address(instr, opcode))
+- break;
+- prefetch = (instr_lo == 0xF) &&
+- (opcode == 0x0D || opcode == 0x18);
+- break;
+- default:
+- scan_more = 0;
+- break;
+- }
+- }
+- return prefetch;
+-}
+-
+-static inline int is_prefetch(struct pt_regs *regs, unsigned long addr,
+- unsigned long error_code)
+-{
+- if (unlikely(boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
+- boot_cpu_data.x86 >= 6)) {
+- /* Catch an obscure case of prefetch inside an NX page. */
+- if (nx_enabled && (error_code & 16))
+- return 0;
+- return __is_prefetch(regs, addr);
+- }
+- return 0;
+-}
+-
+-static noinline void force_sig_info_fault(int si_signo, int si_code,
+- unsigned long address, struct task_struct *tsk)
+-{
+- siginfo_t info;
+-
+- info.si_signo = si_signo;
+- info.si_errno = 0;
+- info.si_code = si_code;
+- info.si_addr = (void __user *)address;
+- force_sig_info(si_signo, &info, tsk);
+-}
+-
+-fastcall void do_invalid_op(struct pt_regs *, unsigned long);
+-
+-#ifdef CONFIG_X86_PAE
+-static void dump_fault_path(unsigned long address)
+-{
+- unsigned long *p, page;
+- unsigned long mfn;
+-
+- page = read_cr3();
+- p = (unsigned long *)__va(page);
+- p += (address >> 30) * 2;
+- printk(KERN_ALERT "%08lx -> *pde = %08lx:%08lx\n", page, p[1], p[0]);
+- if (p[0] & _PAGE_PRESENT) {
+- mfn = (p[0] >> PAGE_SHIFT) | (p[1] << 20);
+- page = mfn_to_pfn(mfn) << PAGE_SHIFT;
+- p = (unsigned long *)__va(page);
+- address &= 0x3fffffff;
+- p += (address >> 21) * 2;
+- printk(KERN_ALERT "%08lx -> *pme = %08lx:%08lx\n",
+- page, p[1], p[0]);
+- mfn = (p[0] >> PAGE_SHIFT) | (p[1] << 20);
+-#ifdef CONFIG_HIGHPTE
+- if (mfn_to_pfn(mfn) >= highstart_pfn)
+- return;
+-#endif
+- if ((p[0] & _PAGE_PRESENT) && !(p[0] & _PAGE_PSE)) {
+- page = mfn_to_pfn(mfn) << PAGE_SHIFT;
+- p = (unsigned long *) __va(page);
+- address &= 0x001fffff;
+- p += (address >> 12) * 2;
+- printk(KERN_ALERT "%08lx -> *pte = %08lx:%08lx\n",
+- page, p[1], p[0]);
+- }
+- }
+-}
+-#else
+-static void dump_fault_path(unsigned long address)
+-{
+- unsigned long page;
+-
+- page = read_cr3();
+- page = ((unsigned long *) __va(page))[address >> PGDIR_SHIFT];
+- printk(KERN_ALERT "*pde = ma %08lx pa %08lx\n", page,
+- machine_to_phys(page));
+- /*
+- * We must not directly access the pte in the highpte
+- * case if the page table is located in highmem.
+- * And lets rather not kmap-atomic the pte, just in case
+- * it's allocated already.
+- */
+- if ((machine_to_phys(page) >> PAGE_SHIFT) < max_low_pfn
+- && (page & _PAGE_PRESENT)
+- && !(page & _PAGE_PSE)) {
+- page = machine_to_phys(page & PAGE_MASK);
+- page = ((unsigned long *) __va(page))[(address >> PAGE_SHIFT)
+- & (PTRS_PER_PTE - 1)];
+- printk(KERN_ALERT "*pte = ma %08lx pa %08lx\n", page,
+- machine_to_phys(page));
+- }
+-}
+-#endif
+-
+-static int spurious_fault(struct pt_regs *regs,
+- unsigned long address,
+- unsigned long error_code)
+-{
+- pgd_t *pgd;
+- pud_t *pud;
+- pmd_t *pmd;
+- pte_t *pte;
+-
+- /* Reserved-bit violation or user access to kernel space? */
+- if (error_code & 0x0c)
+- return 0;
+-
+- pgd = init_mm.pgd + pgd_index(address);
+- if (!pgd_present(*pgd))
+- return 0;
+-
+- pud = pud_offset(pgd, address);
+- if (!pud_present(*pud))
+- return 0;
+-
+- pmd = pmd_offset(pud, address);
+- if (!pmd_present(*pmd))
+- return 0;
+-
+- pte = pte_offset_kernel(pmd, address);
+- if (!pte_present(*pte))
+- return 0;
+- if ((error_code & 0x02) && !pte_write(*pte))
+- return 0;
+-#ifdef CONFIG_X86_PAE
+- if ((error_code & 0x10) && (__pte_val(*pte) & _PAGE_NX))
+- return 0;
+-#endif
+-
+- return 1;
+-}
+-
+-static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
+-{
+- unsigned index = pgd_index(address);
+- pgd_t *pgd_k;
+- pud_t *pud, *pud_k;
+- pmd_t *pmd, *pmd_k;
+-
+- pgd += index;
+- pgd_k = init_mm.pgd + index;
+-
+- if (!pgd_present(*pgd_k))
+- return NULL;
+-
+- /*
+- * set_pgd(pgd, *pgd_k); here would be useless on PAE
+- * and redundant with the set_pmd() on non-PAE. As would
+- * set_pud.
+- */
+-
+- pud = pud_offset(pgd, address);
+- pud_k = pud_offset(pgd_k, address);
+- if (!pud_present(*pud_k))
+- return NULL;
+-
+- pmd = pmd_offset(pud, address);
+- pmd_k = pmd_offset(pud_k, address);
+- if (!pmd_present(*pmd_k))
+- return NULL;
+- if (!pmd_present(*pmd)) {
+- bool lazy = x86_read_percpu(xen_lazy_mmu);
+-
+- x86_write_percpu(xen_lazy_mmu, false);
+-#if CONFIG_XEN_COMPAT > 0x030002
+- set_pmd(pmd, *pmd_k);
+-#else
+- /*
+- * When running on older Xen we must launder *pmd_k through
+- * pmd_val() to ensure that _PAGE_PRESENT is correctly set.
+- */
+- set_pmd(pmd, __pmd(pmd_val(*pmd_k)));
+-#endif
+- x86_write_percpu(xen_lazy_mmu, lazy);
+- } else
+- BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
+- return pmd_k;
+-}
+-
+-/*
+- * Handle a fault on the vmalloc or module mapping area
+- *
+- * This assumes no large pages in there.
+- */
+-static inline int vmalloc_fault(unsigned long address)
+-{
+- unsigned long pgd_paddr;
+- pmd_t *pmd_k;
+- pte_t *pte_k;
+- /*
+- * Synchronize this task's top level page-table
+- * with the 'reference' page table.
+- *
+- * Do _not_ use "current" here. We might be inside
+- * an interrupt in the middle of a task switch..
+- */
+- pgd_paddr = read_cr3();
+- pmd_k = vmalloc_sync_one(__va(pgd_paddr), address);
+- if (!pmd_k)
+- return -1;
+- pte_k = pte_offset_kernel(pmd_k, address);
+- if (!pte_present(*pte_k))
+- return -1;
+- return 0;
+-}
+-
+-int show_unhandled_signals = 1;
+-
+-/*
+- * This routine handles page faults. It determines the address,
+- * and the problem, and then passes it off to one of the appropriate
+- * routines.
+- *
+- * error_code:
+- * bit 0 == 0 means no page found, 1 means protection fault
+- * bit 1 == 0 means read, 1 means write
+- * bit 2 == 0 means kernel, 1 means user-mode
+- * bit 3 == 1 means use of reserved bit detected
+- * bit 4 == 1 means fault was an instruction fetch
+- */
+-fastcall void __kprobes do_page_fault(struct pt_regs *regs,
+- unsigned long error_code)
+-{
+- struct task_struct *tsk;
+- struct mm_struct *mm;
+- struct vm_area_struct * vma;
+- unsigned long address;
+- int write, si_code;
+- int fault;
+-
+- /*
+- * We can fault from pretty much anywhere, with unknown IRQ state.
+- */
+- trace_hardirqs_fixup();
+-
+- /* get the address */
+- address = read_cr2();
+-
+- /* Set the "privileged fault" bit to something sane. */
+- error_code &= ~4;
+- error_code |= (regs->xcs & 2) << 1;
+- if (regs->eflags & X86_EFLAGS_VM)
+- error_code |= 4;
+-
+- tsk = current;
+-
+- si_code = SEGV_MAPERR;
+-
+- /*
+- * We fault-in kernel-space virtual memory on-demand. The
+- * 'reference' page table is init_mm.pgd.
+- *
+- * NOTE! We MUST NOT take any locks for this case. We may
+- * be in an interrupt or a critical region, and should
+- * only copy the information from the master page table,
+- * nothing more.
+- *
+- * This verifies that the fault happens in kernel space
+- * (error_code & 4) == 0, and that the fault was not a
+- * protection error (error_code & 9) == 0.
+- */
+- if (unlikely(address >= TASK_SIZE)) {
+-#ifdef CONFIG_XEN
+- /* Faults in hypervisor area can never be patched up. */
+- if (address >= hypervisor_virt_start)
+- goto bad_area_nosemaphore;
+-#endif
+- if (!(error_code & 0x0000000d) && vmalloc_fault(address) >= 0)
+- return;
+- /* Can take a spurious fault if mapping changes R/O -> R/W. */
+- if (spurious_fault(regs, address, error_code))
+- return;
+- if (notify_page_fault(regs))
+- return;
+- /*
+- * Don't take the mm semaphore here. If we fixup a prefetch
+- * fault we could otherwise deadlock.
+- */
+- goto bad_area_nosemaphore;
+- }
+-
+- if (notify_page_fault(regs))
+- return;
+-
+- /* It's safe to allow irq's after cr2 has been saved and the vmalloc
+- fault has been handled. */
+- if (regs->eflags & (X86_EFLAGS_IF|VM_MASK))
+- local_irq_enable();
+-
+- mm = tsk->mm;
+-
+- /*
+- * If we're in an interrupt, have no user context or are running in an
+- * atomic region then we must not take the fault..
+- */
+- if (in_atomic() || !mm)
+- goto bad_area_nosemaphore;
+-
+- /* When running in the kernel we expect faults to occur only to
+- * addresses in user space. All other faults represent errors in the
+- * kernel and should generate an OOPS. Unfortunately, in the case of an
+- * erroneous fault occurring in a code path which already holds mmap_sem
+- * we will deadlock attempting to validate the fault against the
+- * address space. Luckily the kernel only validly references user
+- * space from well defined areas of code, which are listed in the
+- * exceptions table.
+- *
+- * As the vast majority of faults will be valid we will only perform
+- * the source reference check when there is a possibility of a deadlock.
+- * Attempt to lock the address space, if we cannot we then validate the
+- * source. If this is invalid we can skip the address space check,
+- * thus avoiding the deadlock.
+- */
+- if (!down_read_trylock(&mm->mmap_sem)) {
+- if ((error_code & 4) == 0 &&
+- !search_exception_tables(regs->eip))
+- goto bad_area_nosemaphore;
+- down_read(&mm->mmap_sem);
+- }
+-
+- vma = find_vma(mm, address);
+- if (!vma)
+- goto bad_area;
+- if (vma->vm_start <= address)
+- goto good_area;
+- if (!(vma->vm_flags & VM_GROWSDOWN))
+- goto bad_area;
+- if (error_code & 4) {
+- /*
+- * Accessing the stack below %esp is always a bug.
+- * The large cushion allows instructions like enter
+- * and pusha to work. ("enter $65535,$31" pushes
+- * 32 pointers and then decrements %esp by 65535.)
+- */
+- if (address + 65536 + 32 * sizeof(unsigned long) < regs->esp)
+- goto bad_area;
+- }
+- if (expand_stack(vma, address))
+- goto bad_area;
+-/*
+- * Ok, we have a good vm_area for this memory access, so
+- * we can handle it..
+- */
+-good_area:
+- si_code = SEGV_ACCERR;
+- write = 0;
+- switch (error_code & 3) {
+- default: /* 3: write, present */
+- /* fall through */
+- case 2: /* write, not present */
+- if (!(vma->vm_flags & VM_WRITE))
+- goto bad_area;
+- write++;
+- break;
+- case 1: /* read, present */
+- goto bad_area;
+- case 0: /* read, not present */
+- if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
+- goto bad_area;
+- }
+-
+- survive:
+- /*
+- * If for any reason at all we couldn't handle the fault,
+- * make sure we exit gracefully rather than endlessly redo
+- * the fault.
+- */
+- fault = handle_mm_fault(mm, vma, address, write);
+- if (unlikely(fault & VM_FAULT_ERROR)) {
+- if (fault & VM_FAULT_OOM)
+- goto out_of_memory;
+- else if (fault & VM_FAULT_SIGBUS)
+- goto do_sigbus;
+- BUG();
+- }
+- if (fault & VM_FAULT_MAJOR)
+- tsk->maj_flt++;
+- else
+- tsk->min_flt++;
+-
+- /*
+- * Did it hit the DOS screen memory VA from vm86 mode?
+- */
+- if (regs->eflags & VM_MASK) {
+- unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
+- if (bit < 32)
+- tsk->thread.screen_bitmap |= 1 << bit;
+- }
+- up_read(&mm->mmap_sem);
+- return;
+-
+-/*
+- * Something tried to access memory that isn't in our memory map..
+- * Fix it, but check if it's kernel or user first..
+- */
+-bad_area:
+- up_read(&mm->mmap_sem);
+-
+-bad_area_nosemaphore:
+- /* User mode accesses just cause a SIGSEGV */
+- if (error_code & 4) {
+- /*
+- * It's possible to have interrupts off here.
+- */
+- local_irq_enable();
+-
+- /*
+- * Valid to do another page fault here because this one came
+- * from user space.
+- */
+- if (is_prefetch(regs, address, error_code))
+- return;
+-
+- if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+- printk_ratelimit()) {
+- printk("%s%s[%d]: segfault at %08lx eip %08lx "
+- "esp %08lx error %lx\n",
+- task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
+- tsk->comm, task_pid_nr(tsk), address, regs->eip,
+- regs->esp, error_code);
+- }
+- tsk->thread.cr2 = address;
+- /* Kernel addresses are always protection faults */
+- tsk->thread.error_code = error_code | (address >= TASK_SIZE);
+- tsk->thread.trap_no = 14;
+- force_sig_info_fault(SIGSEGV, si_code, address, tsk);
+- return;
+- }
+-
+-#ifdef CONFIG_X86_F00F_BUG
+- /*
+- * Pentium F0 0F C7 C8 bug workaround.
+- */
+- if (boot_cpu_data.f00f_bug) {
+- unsigned long nr;
+-
+- nr = (address - idt_descr.address) >> 3;
+-
+- if (nr == 6) {
+- do_invalid_op(regs, 0);
+- return;
+- }
+- }
+-#endif
+-
+-no_context:
+- /* Are we prepared to handle this kernel fault? */
+- if (fixup_exception(regs))
+- return;
+-
+- /*
+- * Valid to do another page fault here, because if this fault
+- * had been triggered by is_prefetch fixup_exception would have
+- * handled it.
+- */
+- if (is_prefetch(regs, address, error_code))
+- return;
+-
+-/*
+- * Oops. The kernel tried to access some bad page. We'll have to
+- * terminate things with extreme prejudice.
+- */
+-
+- bust_spinlocks(1);
+-
+- if (oops_may_print()) {
+-#ifdef CONFIG_X86_PAE
+- if (error_code & 16) {
+- pte_t *pte = lookup_address(address);
+-
+- if (pte && pte_present(*pte) && !pte_exec_kernel(*pte))
+- printk(KERN_CRIT "kernel tried to execute "
+- "NX-protected page - exploit attempt? "
+- "(uid: %d)\n", current->uid);
+- }
+-#endif
+- if (address < PAGE_SIZE)
+- printk(KERN_ALERT "BUG: unable to handle kernel NULL "
+- "pointer dereference");
+- else
+- printk(KERN_ALERT "BUG: unable to handle kernel paging"
+- " request");
+- printk(" at virtual address %08lx\n",address);
+- printk(KERN_ALERT "printing eip: %08lx\n", regs->eip);
+- dump_fault_path(address);
+- }
+- tsk->thread.cr2 = address;
+- tsk->thread.trap_no = 14;
+- tsk->thread.error_code = error_code;
+- die("Oops", regs, error_code);
+- bust_spinlocks(0);
+- do_exit(SIGKILL);
+-
+-/*
+- * We ran out of memory, or some other thing happened to us that made
+- * us unable to handle the page fault gracefully.
+- */
+-out_of_memory:
+- up_read(&mm->mmap_sem);
+- if (is_global_init(tsk)) {
+- yield();
+- down_read(&mm->mmap_sem);
+- goto survive;
+- }
+- printk("VM: killing process %s\n", tsk->comm);
+- if (error_code & 4)
+- do_group_exit(SIGKILL);
+- goto no_context;
+-
+-do_sigbus:
+- up_read(&mm->mmap_sem);
+-
+- /* Kernel mode? Handle exceptions or die */
+- if (!(error_code & 4))
+- goto no_context;
+-
+- /* User space => ok to do another page fault */
+- if (is_prefetch(regs, address, error_code))
+- return;
+-
+- tsk->thread.cr2 = address;
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = 14;
+- force_sig_info_fault(SIGBUS, BUS_ADRERR, address, tsk);
+-}
+-
+-void vmalloc_sync_all(void)
+-{
+- /*
+- * Note that races in the updates of insync and start aren't
+- * problematic: insync can only get set bits added, and updates to
+- * start are only improving performance (without affecting correctness
+- * if undone).
+- * XEN: To work on PAE, we need to iterate over PMDs rather than PGDs.
+- * This change works just fine with 2-level paging too.
+- */
+-#define sync_index(a) ((a) >> PMD_SHIFT)
+- static DECLARE_BITMAP(insync, PTRS_PER_PGD*PTRS_PER_PMD);
+- static unsigned long start = TASK_SIZE;
+- unsigned long address;
+-
+- if (SHARED_KERNEL_PMD)
+- return;
+-
+- BUILD_BUG_ON(TASK_SIZE & ~PGDIR_MASK);
+- for (address = start;
+- address >= TASK_SIZE && address < hypervisor_virt_start;
+- address += 1UL << PMD_SHIFT) {
+- if (!test_bit(sync_index(address), insync)) {
+- unsigned long flags;
+- struct page *page;
+-
+- spin_lock_irqsave(&pgd_lock, flags);
+- /* XEN: failure path assumes non-empty pgd_list. */
+- if (unlikely(!pgd_list)) {
+- spin_unlock_irqrestore(&pgd_lock, flags);
+- return;
+- }
+- for (page = pgd_list; page; page =
+- (struct page *)page->index)
+- if (!vmalloc_sync_one(page_address(page),
+- address)) {
+- BUG_ON(page != pgd_list);
+- break;
+- }
+- spin_unlock_irqrestore(&pgd_lock, flags);
+- if (!page)
+- set_bit(sync_index(address), insync);
+- }
+- if (address == start && test_bit(sync_index(address), insync))
+- start = address + (1UL << PMD_SHIFT);
+- }
+-}
+--- a/arch/x86/mm/fault_64-xen.c
++++ /dev/null
+@@ -1,686 +0,0 @@
+-/*
+- * linux/arch/x86-64/mm/fault.c
+- *
+- * Copyright (C) 1995 Linus Torvalds
+- * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs.
+- */
+-
+-#include <linux/signal.h>
+-#include <linux/sched.h>
+-#include <linux/kernel.h>
+-#include <linux/errno.h>
+-#include <linux/string.h>
+-#include <linux/types.h>
+-#include <linux/ptrace.h>
+-#include <linux/mman.h>
+-#include <linux/mm.h>
+-#include <linux/smp.h>
+-#include <linux/interrupt.h>
+-#include <linux/init.h>
+-#include <linux/tty.h>
+-#include <linux/vt_kern.h> /* For unblank_screen() */
+-#include <linux/compiler.h>
+-#include <linux/vmalloc.h>
+-#include <linux/module.h>
+-#include <linux/kprobes.h>
+-#include <linux/uaccess.h>
+-#include <linux/kdebug.h>
+-#include <linux/kprobes.h>
+-
+-#include <asm/system.h>
+-#include <asm/pgalloc.h>
+-#include <asm/smp.h>
+-#include <asm/tlbflush.h>
+-#include <asm/proto.h>
+-#include <asm-generic/sections.h>
+-
+-/* Page fault error code bits */
+-#define PF_PROT (1<<0) /* or no page found */
+-#define PF_WRITE (1<<1)
+-#define PF_USER (1<<2)
+-#define PF_RSVD (1<<3)
+-#define PF_INSTR (1<<4)
+-
+-#ifdef CONFIG_KPROBES
+-static inline int notify_page_fault(struct pt_regs *regs)
+-{
+- int ret = 0;
+-
+- /* kprobe_running() needs smp_processor_id() */
+- if (!user_mode(regs)) {
+- preempt_disable();
+- if (kprobe_running() && kprobe_fault_handler(regs, 14))
+- ret = 1;
+- preempt_enable();
+- }
+-
+- return ret;
+-}
+-#else
+-static inline int notify_page_fault(struct pt_regs *regs)
+-{
+- return 0;
+-}
+-#endif
+-
+-/* Sometimes the CPU reports invalid exceptions on prefetch.
+- Check that here and ignore.
+- Opcode checker based on code by Richard Brunner */
+-static noinline int is_prefetch(struct pt_regs *regs, unsigned long addr,
+- unsigned long error_code)
+-{
+- unsigned char *instr;
+- int scan_more = 1;
+- int prefetch = 0;
+- unsigned char *max_instr;
+-
+- /* If it was a exec fault ignore */
+- if (error_code & PF_INSTR)
+- return 0;
+-
+- instr = (unsigned char __user *)convert_rip_to_linear(current, regs);
+- max_instr = instr + 15;
+-
+- if (user_mode(regs) && instr >= (unsigned char *)TASK_SIZE)
+- return 0;
+-
+- while (scan_more && instr < max_instr) {
+- unsigned char opcode;
+- unsigned char instr_hi;
+- unsigned char instr_lo;
+-
+- if (probe_kernel_address(instr, opcode))
+- break;
+-
+- instr_hi = opcode & 0xf0;
+- instr_lo = opcode & 0x0f;
+- instr++;
+-
+- switch (instr_hi) {
+- case 0x20:
+- case 0x30:
+- /* Values 0x26,0x2E,0x36,0x3E are valid x86
+- prefixes. In long mode, the CPU will signal
+- invalid opcode if some of these prefixes are
+- present so we will never get here anyway */
+- scan_more = ((instr_lo & 7) == 0x6);
+- break;
+-
+- case 0x40:
+- /* In AMD64 long mode, 0x40 to 0x4F are valid REX prefixes
+- Need to figure out under what instruction mode the
+- instruction was issued ... */
+- /* Could check the LDT for lm, but for now it's good
+- enough to assume that long mode only uses well known
+- segments or kernel. */
+- scan_more = (!user_mode(regs)) || (regs->cs == __USER_CS);
+- break;
+-
+- case 0x60:
+- /* 0x64 thru 0x67 are valid prefixes in all modes. */
+- scan_more = (instr_lo & 0xC) == 0x4;
+- break;
+- case 0xF0:
+- /* 0xF0, 0xF2, and 0xF3 are valid prefixes in all modes. */
+- scan_more = !instr_lo || (instr_lo>>1) == 1;
+- break;
+- case 0x00:
+- /* Prefetch instruction is 0x0F0D or 0x0F18 */
+- scan_more = 0;
+- if (probe_kernel_address(instr, opcode))
+- break;
+- prefetch = (instr_lo == 0xF) &&
+- (opcode == 0x0D || opcode == 0x18);
+- break;
+- default:
+- scan_more = 0;
+- break;
+- }
+- }
+- return prefetch;
+-}
+-
+-static int bad_address(void *p)
+-{
+- unsigned long dummy;
+- return probe_kernel_address((unsigned long *)p, dummy);
+-}
+-
+-void dump_pagetable(unsigned long address)
+-{
+- pgd_t *pgd;
+- pud_t *pud;
+- pmd_t *pmd;
+- pte_t *pte;
+-
+- pgd = (pgd_t *)read_cr3();
+-
+- pgd = __va((unsigned long)pgd & PHYSICAL_PAGE_MASK);
+- pgd += pgd_index(address);
+- if (bad_address(pgd)) goto bad;
+- printk("PGD %lx ", pgd_val(*pgd));
+- if (!pgd_present(*pgd)) goto ret;
+-
+- pud = pud_offset(pgd, address);
+- if (bad_address(pud)) goto bad;
+- printk("PUD %lx ", pud_val(*pud));
+- if (!pud_present(*pud)) goto ret;
+-
+- pmd = pmd_offset(pud, address);
+- if (bad_address(pmd)) goto bad;
+- printk("PMD %lx ", pmd_val(*pmd));
+- if (!pmd_present(*pmd) || pmd_large(*pmd)) goto ret;
+-
+- pte = pte_offset_kernel(pmd, address);
+- if (bad_address(pte)) goto bad;
+- printk("PTE %lx", pte_val(*pte));
+-ret:
+- printk("\n");
+- return;
+-bad:
+- printk("BAD\n");
+-}
+-
+-static const char errata93_warning[] =
+-KERN_ERR "******* Your BIOS seems to not contain a fix for K8 errata #93\n"
+-KERN_ERR "******* Working around it, but it may cause SEGVs or burn power.\n"
+-KERN_ERR "******* Please consider a BIOS update.\n"
+-KERN_ERR "******* Disabling USB legacy in the BIOS may also help.\n";
+-
+-/* Workaround for K8 erratum #93 & buggy BIOS.
+- BIOS SMM functions are required to use a specific workaround
+- to avoid corruption of the 64bit RIP register on C stepping K8.
+- A lot of BIOS that didn't get tested properly miss this.
+- The OS sees this as a page fault with the upper 32bits of RIP cleared.
+- Try to work around it here.
+- Note we only handle faults in kernel here. */
+-
+-static int is_errata93(struct pt_regs *regs, unsigned long address)
+-{
+- static int warned;
+- if (address != regs->rip)
+- return 0;
+- if ((address >> 32) != 0)
+- return 0;
+- address |= 0xffffffffUL << 32;
+- if ((address >= (u64)_stext && address <= (u64)_etext) ||
+- (address >= MODULES_VADDR && address <= MODULES_END)) {
+- if (!warned) {
+- printk(errata93_warning);
+- warned = 1;
+- }
+- regs->rip = address;
+- return 1;
+- }
+- return 0;
+-}
+-
+-static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs,
+- unsigned long error_code)
+-{
+- unsigned long flags = oops_begin();
+- struct task_struct *tsk;
+-
+- printk(KERN_ALERT "%s: Corrupted page table at address %lx\n",
+- current->comm, address);
+- dump_pagetable(address);
+- tsk = current;
+- tsk->thread.cr2 = address;
+- tsk->thread.trap_no = 14;
+- tsk->thread.error_code = error_code;
+- __die("Bad pagetable", regs, error_code);
+- oops_end(flags);
+- do_exit(SIGKILL);
+-}
+-
+-/*
+- * Handle a fault on the vmalloc area
+- *
+- * This assumes no large pages in there.
+- */
+-static int vmalloc_fault(unsigned long address)
+-{
+- pgd_t *pgd, *pgd_ref;
+- pud_t *pud, *pud_ref;
+- pmd_t *pmd, *pmd_ref;
+- pte_t *pte, *pte_ref;
+-
+- /* Copy kernel mappings over when needed. This can also
+- happen within a race in page table update. In the later
+- case just flush. */
+-
+- /* On Xen the line below does not always work. Needs investigating! */
+- /*pgd = pgd_offset(current->mm ?: &init_mm, address);*/
+- pgd = __va(read_cr3() & PHYSICAL_PAGE_MASK);
+- pgd += pgd_index(address);
+- pgd_ref = pgd_offset_k(address);
+- if (pgd_none(*pgd_ref))
+- return -1;
+- if (pgd_none(*pgd))
+- set_pgd(pgd, *pgd_ref);
+- else
+- BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+-
+- /* Below here mismatches are bugs because these lower tables
+- are shared */
+-
+- pud = pud_offset(pgd, address);
+- pud_ref = pud_offset(pgd_ref, address);
+- if (pud_none(*pud_ref))
+- return -1;
+- if (pud_none(*pud) || pud_page_vaddr(*pud) != pud_page_vaddr(*pud_ref))
+- BUG();
+- pmd = pmd_offset(pud, address);
+- pmd_ref = pmd_offset(pud_ref, address);
+- if (pmd_none(*pmd_ref))
+- return -1;
+- if (pmd_none(*pmd) || pmd_page(*pmd) != pmd_page(*pmd_ref))
+- BUG();
+- pte_ref = pte_offset_kernel(pmd_ref, address);
+- if (!pte_present(*pte_ref))
+- return -1;
+- pte = pte_offset_kernel(pmd, address);
+- /* Don't use pte_page here, because the mappings can point
+- outside mem_map, and the NUMA hash lookup cannot handle
+- that. */
+- if (!pte_present(*pte) || pte_pfn(*pte) != pte_pfn(*pte_ref))
+- BUG();
+- return 0;
+-}
+-
+-int show_unhandled_signals = 1;
+-
+-
+-#define MEM_VERBOSE 1
+-
+-#ifdef MEM_VERBOSE
+-#define MEM_LOG(_f, _a...) \
+- printk("fault.c:[%d]-> " _f "\n", \
+- __LINE__ , ## _a )
+-#else
+-#define MEM_LOG(_f, _a...) ((void)0)
+-#endif
+-
+-static int spurious_fault(struct pt_regs *regs,
+- unsigned long address,
+- unsigned long error_code)
+-{
+- pgd_t *pgd;
+- pud_t *pud;
+- pmd_t *pmd;
+- pte_t *pte;
+-
+-#ifdef CONFIG_XEN
+- /* Faults in hypervisor area are never spurious. */
+- if ((address >= HYPERVISOR_VIRT_START) &&
+- (address < HYPERVISOR_VIRT_END))
+- return 0;
+-#endif
+-
+- /* Reserved-bit violation or user access to kernel space? */
+- if (error_code & (PF_RSVD|PF_USER))
+- return 0;
+-
+- pgd = init_mm.pgd + pgd_index(address);
+- if (!pgd_present(*pgd))
+- return 0;
+-
+- pud = pud_offset(pgd, address);
+- if (!pud_present(*pud))
+- return 0;
+-
+- pmd = pmd_offset(pud, address);
+- if (!pmd_present(*pmd))
+- return 0;
+-
+- pte = pte_offset_kernel(pmd, address);
+- if (!pte_present(*pte))
+- return 0;
+- if ((error_code & PF_WRITE) && !pte_write(*pte))
+- return 0;
+- if ((error_code & PF_INSTR) && (__pte_val(*pte) & _PAGE_NX))
+- return 0;
+-
+- return 1;
+-}
+-
+-/*
+- * This routine handles page faults. It determines the address,
+- * and the problem, and then passes it off to one of the appropriate
+- * routines.
+- */
+-asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
+- unsigned long error_code)
+-{
+- struct task_struct *tsk;
+- struct mm_struct *mm;
+- struct vm_area_struct * vma;
+- unsigned long address;
+- const struct exception_table_entry *fixup;
+- int write, fault;
+- unsigned long flags;
+- siginfo_t info;
+-
+- if (!user_mode(regs))
+- error_code &= ~PF_USER; /* means kernel */
+-
+- /*
+- * We can fault from pretty much anywhere, with unknown IRQ state.
+- */
+- trace_hardirqs_fixup();
+-
+- tsk = current;
+- mm = tsk->mm;
+- prefetchw(&mm->mmap_sem);
+-
+- /* get the address */
+- address = read_cr2();
+-
+- info.si_code = SEGV_MAPERR;
+-
+-
+- /*
+- * We fault-in kernel-space virtual memory on-demand. The
+- * 'reference' page table is init_mm.pgd.
+- *
+- * NOTE! We MUST NOT take any locks for this case. We may
+- * be in an interrupt or a critical region, and should
+- * only copy the information from the master page table,
+- * nothing more.
+- *
+- * This verifies that the fault happens in kernel space
+- * (error_code & 4) == 0, and that the fault was not a
+- * protection error (error_code & 9) == 0.
+- */
+- if (unlikely(address >= TASK_SIZE64)) {
+- /*
+- * Don't check for the module range here: its PML4
+- * is always initialized because it's shared with the main
+- * kernel text. Only vmalloc may need PML4 syncups.
+- */
+- if (!(error_code & (PF_RSVD|PF_USER|PF_PROT)) &&
+- ((address >= VMALLOC_START && address < VMALLOC_END))) {
+- if (vmalloc_fault(address) >= 0)
+- return;
+- }
+- /* Can take a spurious fault if mapping changes R/O -> R/W. */
+- if (spurious_fault(regs, address, error_code))
+- return;
+- if (notify_page_fault(regs))
+- return;
+- /*
+- * Don't take the mm semaphore here. If we fixup a prefetch
+- * fault we could otherwise deadlock.
+- */
+- goto bad_area_nosemaphore;
+- }
+-
+- if (notify_page_fault(regs))
+- return;
+-
+- if (likely(regs->eflags & X86_EFLAGS_IF))
+- local_irq_enable();
+-
+- if (unlikely(error_code & PF_RSVD))
+- pgtable_bad(address, regs, error_code);
+-
+- /*
+- * If we're in an interrupt or have no user
+- * context, we must not take the fault..
+- */
+- if (unlikely(in_atomic() || !mm))
+- goto bad_area_nosemaphore;
+-
+- /*
+- * User-mode registers count as a user access even for any
+- * potential system fault or CPU buglet.
+- */
+- if (user_mode_vm(regs))
+- error_code |= PF_USER;
+-
+- again:
+- /* When running in the kernel we expect faults to occur only to
+- * addresses in user space. All other faults represent errors in the
+- * kernel and should generate an OOPS. Unfortunately, in the case of an
+- * erroneous fault occurring in a code path which already holds mmap_sem
+- * we will deadlock attempting to validate the fault against the
+- * address space. Luckily the kernel only validly references user
+- * space from well defined areas of code, which are listed in the
+- * exceptions table.
+- *
+- * As the vast majority of faults will be valid we will only perform
+- * the source reference check when there is a possibility of a deadlock.
+- * Attempt to lock the address space, if we cannot we then validate the
+- * source. If this is invalid we can skip the address space check,
+- * thus avoiding the deadlock.
+- */
+- if (!down_read_trylock(&mm->mmap_sem)) {
+- if ((error_code & PF_USER) == 0 &&
+- !search_exception_tables(regs->rip))
+- goto bad_area_nosemaphore;
+- down_read(&mm->mmap_sem);
+- }
+-
+- vma = find_vma(mm, address);
+- if (!vma)
+- goto bad_area;
+- if (likely(vma->vm_start <= address))
+- goto good_area;
+- if (!(vma->vm_flags & VM_GROWSDOWN))
+- goto bad_area;
+- if (error_code & 4) {
+- /* Allow userspace just enough access below the stack pointer
+- * to let the 'enter' instruction work.
+- */
+- if (address + 65536 + 32 * sizeof(unsigned long) < regs->rsp)
+- goto bad_area;
+- }
+- if (expand_stack(vma, address))
+- goto bad_area;
+-/*
+- * Ok, we have a good vm_area for this memory access, so
+- * we can handle it..
+- */
+-good_area:
+- info.si_code = SEGV_ACCERR;
+- write = 0;
+- switch (error_code & (PF_PROT|PF_WRITE)) {
+- default: /* 3: write, present */
+- /* fall through */
+- case PF_WRITE: /* write, not present */
+- if (!(vma->vm_flags & VM_WRITE))
+- goto bad_area;
+- write++;
+- break;
+- case PF_PROT: /* read, present */
+- goto bad_area;
+- case 0: /* read, not present */
+- if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
+- goto bad_area;
+- }
+-
+- /*
+- * If for any reason at all we couldn't handle the fault,
+- * make sure we exit gracefully rather than endlessly redo
+- * the fault.
+- */
+- fault = handle_mm_fault(mm, vma, address, write);
+- if (unlikely(fault & VM_FAULT_ERROR)) {
+- if (fault & VM_FAULT_OOM)
+- goto out_of_memory;
+- else if (fault & VM_FAULT_SIGBUS)
+- goto do_sigbus;
+- BUG();
+- }
+- if (fault & VM_FAULT_MAJOR)
+- tsk->maj_flt++;
+- else
+- tsk->min_flt++;
+- up_read(&mm->mmap_sem);
+- return;
+-
+-/*
+- * Something tried to access memory that isn't in our memory map..
+- * Fix it, but check if it's kernel or user first..
+- */
+-bad_area:
+- up_read(&mm->mmap_sem);
+-
+-bad_area_nosemaphore:
+- /* User mode accesses just cause a SIGSEGV */
+- if (error_code & PF_USER) {
+-
+- /*
+- * It's possible to have interrupts off here.
+- */
+- local_irq_enable();
+-
+- if (is_prefetch(regs, address, error_code))
+- return;
+-
+- /* Work around K8 erratum #100 K8 in compat mode
+- occasionally jumps to illegal addresses >4GB. We
+- catch this here in the page fault handler because
+- these addresses are not reachable. Just detect this
+- case and return. Any code segment in LDT is
+- compatibility mode. */
+- if ((regs->cs == __USER32_CS || (regs->cs & (1<<2))) &&
+- (address >> 32))
+- return;
+-
+- if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+- printk_ratelimit()) {
+- printk(
+- "%s%s[%d]: segfault at %lx rip %lx rsp %lx error %lx\n",
+- tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
+- tsk->comm, tsk->pid, address, regs->rip,
+- regs->rsp, error_code);
+- }
+-
+- tsk->thread.cr2 = address;
+- /* Kernel addresses are always protection faults */
+- tsk->thread.error_code = error_code | (address >= TASK_SIZE);
+- tsk->thread.trap_no = 14;
+- info.si_signo = SIGSEGV;
+- info.si_errno = 0;
+- /* info.si_code has been set above */
+- info.si_addr = (void __user *)address;
+- force_sig_info(SIGSEGV, &info, tsk);
+- return;
+- }
+-
+-no_context:
+-
+- /* Are we prepared to handle this kernel fault? */
+- fixup = search_exception_tables(regs->rip);
+- if (fixup) {
+- regs->rip = fixup->fixup;
+- return;
+- }
+-
+- /*
+- * Hall of shame of CPU/BIOS bugs.
+- */
+-
+- if (is_prefetch(regs, address, error_code))
+- return;
+-
+- if (is_errata93(regs, address))
+- return;
+-
+-/*
+- * Oops. The kernel tried to access some bad page. We'll have to
+- * terminate things with extreme prejudice.
+- */
+-
+- flags = oops_begin();
+-
+- if (address < PAGE_SIZE)
+- printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
+- else
+- printk(KERN_ALERT "Unable to handle kernel paging request");
+- printk(" at %016lx RIP: \n" KERN_ALERT,address);
+- printk_address(regs->rip);
+- dump_pagetable(address);
+- tsk->thread.cr2 = address;
+- tsk->thread.trap_no = 14;
+- tsk->thread.error_code = error_code;
+- __die("Oops", regs, error_code);
+- /* Executive summary in case the body of the oops scrolled away */
+- printk(KERN_EMERG "CR2: %016lx\n", address);
+- oops_end(flags);
+- do_exit(SIGKILL);
+-
+-/*
+- * We ran out of memory, or some other thing happened to us that made
+- * us unable to handle the page fault gracefully.
+- */
+-out_of_memory:
+- up_read(&mm->mmap_sem);
+- if (is_global_init(current)) {
+- yield();
+- goto again;
+- }
+- printk("VM: killing process %s\n", tsk->comm);
+- if (error_code & 4)
+- do_group_exit(SIGKILL);
+- goto no_context;
+-
+-do_sigbus:
+- up_read(&mm->mmap_sem);
+-
+- /* Kernel mode? Handle exceptions or die */
+- if (!(error_code & PF_USER))
+- goto no_context;
+-
+- tsk->thread.cr2 = address;
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = 14;
+- info.si_signo = SIGBUS;
+- info.si_errno = 0;
+- info.si_code = BUS_ADRERR;
+- info.si_addr = (void __user *)address;
+- force_sig_info(SIGBUS, &info, tsk);
+- return;
+-}
+-
+-DEFINE_SPINLOCK(pgd_lock);
+-LIST_HEAD(pgd_list);
+-
+-void vmalloc_sync_all(void)
+-{
+- /* Note that races in the updates of insync and start aren't
+- problematic:
+- insync can only get set bits added, and updates to start are only
+- improving performance (without affecting correctness if undone). */
+- static DECLARE_BITMAP(insync, PTRS_PER_PGD);
+- static unsigned long start = VMALLOC_START & PGDIR_MASK;
+- unsigned long address;
+-
+- for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
+- if (!test_bit(pgd_index(address), insync)) {
+- const pgd_t *pgd_ref = pgd_offset_k(address);
+- struct page *page;
+-
+- if (pgd_none(*pgd_ref))
+- continue;
+- spin_lock(&pgd_lock);
+- list_for_each_entry(page, &pgd_list, lru) {
+- pgd_t *pgd;
+- pgd = (pgd_t *)page_address(page) + pgd_index(address);
+- if (pgd_none(*pgd))
+- set_pgd(pgd, *pgd_ref);
+- else
+- BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+- }
+- spin_unlock(&pgd_lock);
+- set_bit(pgd_index(address), insync);
+- }
+- if (address == start)
+- start = address + PGDIR_SIZE;
+- }
+- /* Check that there is no need to do the same for the modules area. */
+- BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL));
+- BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
+- (__START_KERNEL & PGDIR_MASK)));
+-}
+--- /dev/null
++++ b/arch/x86/mm/fault-xen.c
+@@ -0,0 +1,1026 @@
++/*
++ * Copyright (C) 1995 Linus Torvalds
++ * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs.
++ */
++
++#include <linux/signal.h>
++#include <linux/sched.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/types.h>
++#include <linux/ptrace.h>
++#include <linux/mman.h>
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/interrupt.h>
++#include <linux/init.h>
++#include <linux/tty.h>
++#include <linux/vt_kern.h> /* For unblank_screen() */
++#include <linux/compiler.h>
++#include <linux/highmem.h>
++#include <linux/bootmem.h> /* for max_low_pfn */
++#include <linux/vmalloc.h>
++#include <linux/module.h>
++#include <linux/kprobes.h>
++#include <linux/uaccess.h>
++#include <linux/kdebug.h>
++
++#include <asm/system.h>
++#include <asm/desc.h>
++#include <asm/segment.h>
++#include <asm/pgalloc.h>
++#include <asm/smp.h>
++#include <asm/tlbflush.h>
++#include <asm/proto.h>
++#include <asm-generic/sections.h>
++
++/*
++ * Page fault error code bits
++ * bit 0 == 0 means no page found, 1 means protection fault
++ * bit 1 == 0 means read, 1 means write
++ * bit 2 == 0 means kernel, 1 means user-mode
++ * bit 3 == 1 means use of reserved bit detected
++ * bit 4 == 1 means fault was an instruction fetch
++ */
++#define PF_PROT (1<<0)
++#define PF_WRITE (1<<1)
++#define PF_USER (1<<2)
++#define PF_RSVD (1<<3)
++#define PF_INSTR (1<<4)
++
++static inline int notify_page_fault(struct pt_regs *regs)
++{
++#ifdef CONFIG_KPROBES
++ int ret = 0;
++
++ /* kprobe_running() needs smp_processor_id() */
++#ifdef CONFIG_X86_32
++ if (!user_mode_vm(regs)) {
++#else
++ if (!user_mode(regs)) {
++#endif
++ preempt_disable();
++ if (kprobe_running() && kprobe_fault_handler(regs, 14))
++ ret = 1;
++ preempt_enable();
++ }
++
++ return ret;
++#else
++ return 0;
++#endif
++}
++
++/*
++ * X86_32
++ * Sometimes AMD Athlon/Opteron CPUs report invalid exceptions on prefetch.
++ * Check that here and ignore it.
++ *
++ * X86_64
++ * Sometimes the CPU reports invalid exceptions on prefetch.
++ * Check that here and ignore it.
++ *
++ * Opcode checker based on code by Richard Brunner
++ */
++static int is_prefetch(struct pt_regs *regs, unsigned long addr,
++ unsigned long error_code)
++{
++ unsigned char *instr;
++ int scan_more = 1;
++ int prefetch = 0;
++ unsigned char *max_instr;
++
++ /*
++ * If it was a exec (instruction fetch) fault on NX page, then
++ * do not ignore the fault:
++ */
++ if (error_code & PF_INSTR)
++ return 0;
++
++ instr = (unsigned char *)convert_ip_to_linear(current, regs);
++ max_instr = instr + 15;
++
++ if (user_mode(regs) && instr >= (unsigned char *)TASK_SIZE)
++ return 0;
++
++ while (scan_more && instr < max_instr) {
++ unsigned char opcode;
++ unsigned char instr_hi;
++ unsigned char instr_lo;
++
++ if (probe_kernel_address(instr, opcode))
++ break;
++
++ instr_hi = opcode & 0xf0;
++ instr_lo = opcode & 0x0f;
++ instr++;
++
++ switch (instr_hi) {
++ case 0x20:
++ case 0x30:
++ /*
++ * Values 0x26,0x2E,0x36,0x3E are valid x86 prefixes.
++ * In X86_64 long mode, the CPU will signal invalid
++ * opcode if some of these prefixes are present so
++ * X86_64 will never get here anyway
++ */
++ scan_more = ((instr_lo & 7) == 0x6);
++ break;
++#ifdef CONFIG_X86_64
++ case 0x40:
++ /*
++ * In AMD64 long mode 0x40..0x4F are valid REX prefixes
++ * Need to figure out under what instruction mode the
++ * instruction was issued. Could check the LDT for lm,
++ * but for now it's good enough to assume that long
++ * mode only uses well known segments or kernel.
++ */
++ scan_more = (!user_mode(regs)) || (regs->cs == __USER_CS);
++ break;
++#endif
++ case 0x60:
++ /* 0x64 thru 0x67 are valid prefixes in all modes. */
++ scan_more = (instr_lo & 0xC) == 0x4;
++ break;
++ case 0xF0:
++ /* 0xF0, 0xF2, 0xF3 are valid prefixes in all modes. */
++ scan_more = !instr_lo || (instr_lo>>1) == 1;
++ break;
++ case 0x00:
++ /* Prefetch instruction is 0x0F0D or 0x0F18 */
++ scan_more = 0;
++
++ if (probe_kernel_address(instr, opcode))
++ break;
++ prefetch = (instr_lo == 0xF) &&
++ (opcode == 0x0D || opcode == 0x18);
++ break;
++ default:
++ scan_more = 0;
++ break;
++ }
++ }
++ return prefetch;
++}
++
++static void force_sig_info_fault(int si_signo, int si_code,
++ unsigned long address, struct task_struct *tsk)
++{
++ siginfo_t info;
++
++ info.si_signo = si_signo;
++ info.si_errno = 0;
++ info.si_code = si_code;
++ info.si_addr = (void __user *)address;
++ force_sig_info(si_signo, &info, tsk);
++}
++
++#ifdef CONFIG_X86_64
++static int bad_address(void *p)
++{
++ unsigned long dummy;
++ return probe_kernel_address((unsigned long *)p, dummy);
++}
++#endif
++
++static void dump_pagetable(unsigned long address)
++{
++#ifdef CONFIG_X86_32
++ __typeof__(pte_val(__pte(0))) page;
++
++ page = read_cr3();
++ page = ((__typeof__(page) *) __va(page))[address >> PGDIR_SHIFT];
++#ifdef CONFIG_X86_PAE
++ printk("*pdpt = %016Lx ", page);
++ if ((page & _PAGE_PRESENT)
++ && mfn_to_local_pfn(page >> PAGE_SHIFT) < max_low_pfn) {
++ page = mfn_to_pfn(page >> PAGE_SHIFT);
++ page <<= PAGE_SHIFT;
++ page = ((__typeof__(page) *) __va(page))[(address >> PMD_SHIFT)
++ & (PTRS_PER_PMD - 1)];
++ printk(KERN_CONT "*pde = %016Lx ", page);
++ page &= ~_PAGE_NX;
++ }
++#else
++ printk("*pde = %08lx ", page);
++#endif
++
++ /*
++ * We must not directly access the pte in the highpte
++ * case if the page table is located in highmem.
++ * And let's rather not kmap-atomic the pte, just in case
++ * it's allocated already.
++ */
++ if ((page & _PAGE_PRESENT)
++ && mfn_to_local_pfn(page >> PAGE_SHIFT) < max_low_pfn
++ && !(page & _PAGE_PSE)) {
++ page = mfn_to_pfn(page >> PAGE_SHIFT);
++ page <<= PAGE_SHIFT;
++ page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT)
++ & (PTRS_PER_PTE - 1)];
++ printk(KERN_CONT "*pte = %0*Lx ", sizeof(page)*2, (u64)page);
++ }
++
++ printk(KERN_CONT "\n");
++#else /* CONFIG_X86_64 */
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++
++ pgd = (pgd_t *)read_cr3();
++
++ pgd = __va((unsigned long)pgd & PHYSICAL_PAGE_MASK);
++ pgd += pgd_index(address);
++ if (bad_address(pgd)) goto bad;
++ printk("PGD %lx ", pgd_val(*pgd));
++ if (!pgd_present(*pgd)) goto ret;
++
++ pud = pud_offset(pgd, address);
++ if (bad_address(pud)) goto bad;
++ printk(KERN_CONT "PUD %lx ", pud_val(*pud));
++ if (!pud_present(*pud) || pud_large(*pud))
++ goto ret;
++
++ pmd = pmd_offset(pud, address);
++ if (bad_address(pmd)) goto bad;
++ printk(KERN_CONT "PMD %lx ", pmd_val(*pmd));
++ if (!pmd_present(*pmd) || pmd_large(*pmd)) goto ret;
++
++ pte = pte_offset_kernel(pmd, address);
++ if (bad_address(pte)) goto bad;
++ printk(KERN_CONT "PTE %lx", pte_val(*pte));
++ret:
++ printk(KERN_CONT "\n");
++ return;
++bad:
++ printk("BAD\n");
++#endif
++}
++
++#ifdef CONFIG_X86_32
++static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
++{
++ unsigned index = pgd_index(address);
++ pgd_t *pgd_k;
++ pud_t *pud, *pud_k;
++ pmd_t *pmd, *pmd_k;
++
++ pgd += index;
++ pgd_k = init_mm.pgd + index;
++
++ if (!pgd_present(*pgd_k))
++ return NULL;
++
++ /*
++ * set_pgd(pgd, *pgd_k); here would be useless on PAE
++ * and redundant with the set_pmd() on non-PAE. As would
++ * set_pud.
++ */
++
++ pud = pud_offset(pgd, address);
++ pud_k = pud_offset(pgd_k, address);
++ if (!pud_present(*pud_k))
++ return NULL;
++
++ pmd = pmd_offset(pud, address);
++ pmd_k = pmd_offset(pud_k, address);
++ if (!pmd_present(*pmd_k))
++ return NULL;
++ if (!pmd_present(*pmd)) {
++ bool lazy = x86_read_percpu(xen_lazy_mmu);
++
++ x86_write_percpu(xen_lazy_mmu, false);
++#if CONFIG_XEN_COMPAT > 0x030002
++ set_pmd(pmd, *pmd_k);
++#else
++ /*
++ * When running on older Xen we must launder *pmd_k through
++ * pmd_val() to ensure that _PAGE_PRESENT is correctly set.
++ */
++ set_pmd(pmd, __pmd(pmd_val(*pmd_k)));
++#endif
++ x86_write_percpu(xen_lazy_mmu, lazy);
++ } else
++ BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
++ return pmd_k;
++}
++#endif
++
++#ifdef CONFIG_X86_64
++static const char errata93_warning[] =
++KERN_ERR "******* Your BIOS seems to not contain a fix for K8 errata #93\n"
++KERN_ERR "******* Working around it, but it may cause SEGVs or burn power.\n"
++KERN_ERR "******* Please consider a BIOS update.\n"
++KERN_ERR "******* Disabling USB legacy in the BIOS may also help.\n";
++#endif
++
++/* Workaround for K8 erratum #93 & buggy BIOS.
++ BIOS SMM functions are required to use a specific workaround
++ to avoid corruption of the 64bit RIP register on C stepping K8.
++ A lot of BIOS that didn't get tested properly miss this.
++ The OS sees this as a page fault with the upper 32bits of RIP cleared.
++ Try to work around it here.
++ Note we only handle faults in kernel here.
++ Does nothing for X86_32
++ */
++static int is_errata93(struct pt_regs *regs, unsigned long address)
++{
++#ifdef CONFIG_X86_64
++ static int warned;
++ if (address != regs->ip)
++ return 0;
++ if ((address >> 32) != 0)
++ return 0;
++ address |= 0xffffffffUL << 32;
++ if ((address >= (u64)_stext && address <= (u64)_etext) ||
++ (address >= MODULES_VADDR && address <= MODULES_END)) {
++ if (!warned) {
++ printk(errata93_warning);
++ warned = 1;
++ }
++ regs->ip = address;
++ return 1;
++ }
++#endif
++ return 0;
++}
++
++/*
++ * Work around K8 erratum #100 K8 in compat mode occasionally jumps to illegal
++ * addresses >4GB. We catch this in the page fault handler because these
++ * addresses are not reachable. Just detect this case and return. Any code
++ * segment in LDT is compatibility mode.
++ */
++static int is_errata100(struct pt_regs *regs, unsigned long address)
++{
++#ifdef CONFIG_X86_64
++ if ((regs->cs == __USER32_CS || (regs->cs & (1<<2))) &&
++ (address >> 32))
++ return 1;
++#endif
++ return 0;
++}
++
++void do_invalid_op(struct pt_regs *, unsigned long);
++
++static int is_f00f_bug(struct pt_regs *regs, unsigned long address)
++{
++#ifdef CONFIG_X86_F00F_BUG
++ unsigned long nr;
++ /*
++ * Pentium F0 0F C7 C8 bug workaround.
++ */
++ if (boot_cpu_data.f00f_bug) {
++ nr = (address - idt_descr.address) >> 3;
++
++ if (nr == 6) {
++ do_invalid_op(regs, 0);
++ return 1;
++ }
++ }
++#endif
++ return 0;
++}
++
++static void show_fault_oops(struct pt_regs *regs, unsigned long error_code,
++ unsigned long address)
++{
++#ifdef CONFIG_X86_32
++ if (!oops_may_print())
++ return;
++#endif
++
++#ifdef CONFIG_X86_PAE
++ if (error_code & PF_INSTR) {
++ unsigned int level;
++ pte_t *pte = lookup_address(address, &level);
++
++ if (pte && pte_present(*pte) && !pte_exec(*pte))
++ printk(KERN_CRIT "kernel tried to execute "
++ "NX-protected page - exploit attempt? "
++ "(uid: %d)\n", current->uid);
++ }
++#endif
++
++ printk(KERN_ALERT "BUG: unable to handle kernel ");
++ if (address < PAGE_SIZE)
++ printk(KERN_CONT "NULL pointer dereference");
++ else
++ printk(KERN_CONT "paging request");
++#ifdef CONFIG_X86_32
++ printk(KERN_CONT " at %08lx\n", address);
++#else
++ printk(KERN_CONT " at %016lx\n", address);
++#endif
++ printk(KERN_ALERT "IP:");
++ printk_address(regs->ip, 1);
++ dump_pagetable(address);
++}
++
++#ifdef CONFIG_X86_64
++static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs,
++ unsigned long error_code)
++{
++ unsigned long flags = oops_begin();
++ struct task_struct *tsk;
++
++ printk(KERN_ALERT "%s: Corrupted page table at address %lx\n",
++ current->comm, address);
++ dump_pagetable(address);
++ tsk = current;
++ tsk->thread.cr2 = address;
++ tsk->thread.trap_no = 14;
++ tsk->thread.error_code = error_code;
++ if (__die("Bad pagetable", regs, error_code))
++ regs = NULL;
++ oops_end(flags, regs, SIGKILL);
++}
++#endif
++
++static int spurious_fault_check(unsigned long error_code, pte_t *pte)
++{
++ if ((error_code & PF_WRITE) && !pte_write(*pte))
++ return 0;
++ if ((error_code & PF_INSTR) && !pte_exec(*pte))
++ return 0;
++
++ return 1;
++}
++
++/*
++ * Handle a spurious fault caused by a stale TLB entry. This allows
++ * us to lazily refresh the TLB when increasing the permissions of a
++ * kernel page (RO -> RW or NX -> X). Doing it eagerly is very
++ * expensive since that implies doing a full cross-processor TLB
++ * flush, even if no stale TLB entries exist on other processors.
++ * There are no security implications to leaving a stale TLB when
++ * increasing the permissions on a page.
++ */
++static int spurious_fault(unsigned long address,
++ unsigned long error_code)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++
++ /* Reserved-bit violation or user access to kernel space? */
++ if (error_code & (PF_USER | PF_RSVD))
++ return 0;
++
++ pgd = init_mm.pgd + pgd_index(address);
++ if (!pgd_present(*pgd))
++ return 0;
++
++ pud = pud_offset(pgd, address);
++ if (!pud_present(*pud))
++ return 0;
++
++ if (pud_large(*pud))
++ return spurious_fault_check(error_code, (pte_t *) pud);
++
++ pmd = pmd_offset(pud, address);
++ if (!pmd_present(*pmd))
++ return 0;
++
++ if (pmd_large(*pmd))
++ return spurious_fault_check(error_code, (pte_t *) pmd);
++
++ pte = pte_offset_kernel(pmd, address);
++ if (!pte_present(*pte))
++ return 0;
++
++ return spurious_fault_check(error_code, pte);
++}
++
++/*
++ * X86_32
++ * Handle a fault on the vmalloc or module mapping area
++ *
++ * X86_64
++ * Handle a fault on the vmalloc area
++ *
++ * This assumes no large pages in there.
++ */
++static int vmalloc_fault(unsigned long address)
++{
++#ifdef CONFIG_X86_32
++ unsigned long pgd_paddr;
++ pmd_t *pmd_k;
++ pte_t *pte_k;
++ /*
++ * Synchronize this task's top level page-table
++ * with the 'reference' page table.
++ *
++ * Do _not_ use "current" here. We might be inside
++ * an interrupt in the middle of a task switch..
++ */
++ pgd_paddr = read_cr3();
++ pmd_k = vmalloc_sync_one(__va(pgd_paddr), address);
++ if (!pmd_k)
++ return -1;
++ pte_k = pte_offset_kernel(pmd_k, address);
++ if (!pte_present(*pte_k))
++ return -1;
++ return 0;
++#else
++ pgd_t *pgd, *pgd_ref;
++ pud_t *pud, *pud_ref;
++ pmd_t *pmd, *pmd_ref;
++ pte_t *pte, *pte_ref;
++
++ /* Make sure we are in vmalloc area */
++ if (!(address >= VMALLOC_START && address < VMALLOC_END))
++ return -1;
++
++ /* Copy kernel mappings over when needed. This can also
++ happen within a race in page table update. In the later
++ case just flush. */
++
++ /* On Xen the line below does not always work. Needs investigating! */
++ /*pgd = pgd_offset(current->mm ?: &init_mm, address);*/
++ pgd = __va(read_cr3() & PHYSICAL_PAGE_MASK);
++ pgd += pgd_index(address);
++ pgd_ref = pgd_offset_k(address);
++ if (pgd_none(*pgd_ref))
++ return -1;
++ if (pgd_none(*pgd))
++ set_pgd(pgd, *pgd_ref);
++ else
++ BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
++
++ /* Below here mismatches are bugs because these lower tables
++ are shared */
++
++ pud = pud_offset(pgd, address);
++ pud_ref = pud_offset(pgd_ref, address);
++ if (pud_none(*pud_ref))
++ return -1;
++ if (pud_none(*pud) || pud_page_vaddr(*pud) != pud_page_vaddr(*pud_ref))
++ BUG();
++ pmd = pmd_offset(pud, address);
++ pmd_ref = pmd_offset(pud_ref, address);
++ if (pmd_none(*pmd_ref))
++ return -1;
++ if (pmd_none(*pmd) || pmd_page(*pmd) != pmd_page(*pmd_ref))
++ BUG();
++ pte_ref = pte_offset_kernel(pmd_ref, address);
++ if (!pte_present(*pte_ref))
++ return -1;
++ pte = pte_offset_kernel(pmd, address);
++ /* Don't use pte_page here, because the mappings can point
++ outside mem_map, and the NUMA hash lookup cannot handle
++ that. */
++ if (!pte_present(*pte) || pte_pfn(*pte) != pte_pfn(*pte_ref))
++ BUG();
++ return 0;
++#endif
++}
++
++int show_unhandled_signals = 1;
++
++/*
++ * This routine handles page faults. It determines the address,
++ * and the problem, and then passes it off to one of the appropriate
++ * routines.
++ */
++#ifdef CONFIG_X86_64
++asmlinkage
++#endif
++void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
++{
++ struct task_struct *tsk;
++ struct mm_struct *mm;
++ struct vm_area_struct *vma;
++ unsigned long address;
++ int write, si_code;
++ int fault;
++#ifdef CONFIG_X86_64
++ unsigned long flags;
++#endif
++
++ /*
++ * We can fault from pretty much anywhere, with unknown IRQ state.
++ */
++ trace_hardirqs_fixup();
++
++ /* Set the "privileged fault" bit to something sane. */
++ if (user_mode_vm(regs))
++ error_code |= PF_USER;
++ else
++ error_code &= ~PF_USER;
++
++ tsk = current;
++ mm = tsk->mm;
++ prefetchw(&mm->mmap_sem);
++
++ /* get the address */
++ address = read_cr2();
++
++ si_code = SEGV_MAPERR;
++
++ if (notify_page_fault(regs))
++ return;
++
++ /*
++ * We fault-in kernel-space virtual memory on-demand. The
++ * 'reference' page table is init_mm.pgd.
++ *
++ * NOTE! We MUST NOT take any locks for this case. We may
++ * be in an interrupt or a critical region, and should
++ * only copy the information from the master page table,
++ * nothing more.
++ *
++ * This verifies that the fault happens in kernel space
++ * (error_code & 4) == 0, and that the fault was not a
++ * protection error (error_code & 9) == 0.
++ */
++#ifdef CONFIG_X86_32
++ if (unlikely(address >= TASK_SIZE)) {
++#else
++ if (unlikely(address >= TASK_SIZE64)) {
++#endif
++ /* Faults in hypervisor area can never be patched up. */
++#if defined(CONFIG_X86_XEN)
++ if (address >= hypervisor_virt_start)
++ goto bad_area_nosemaphore;
++#elif defined(CONFIG_X86_64_XEN)
++ /* Faults in hypervisor area are never spurious. */
++ if (address >= HYPERVISOR_VIRT_START
++ && address < HYPERVISOR_VIRT_END)
++ goto bad_area_nosemaphore;
++#endif
++ if (!(error_code & (PF_RSVD|PF_USER|PF_PROT)) &&
++ vmalloc_fault(address) >= 0)
++ return;
++
++ /* Can handle a stale RO->RW TLB */
++ if (spurious_fault(address, error_code))
++ return;
++
++ /*
++ * Don't take the mm semaphore here. If we fixup a prefetch
++ * fault we could otherwise deadlock.
++ */
++ goto bad_area_nosemaphore;
++ }
++
++
++#ifdef CONFIG_X86_32
++ /* It's safe to allow irq's after cr2 has been saved and the vmalloc
++ fault has been handled. */
++ if (regs->flags & (X86_EFLAGS_IF|VM_MASK))
++ local_irq_enable();
++
++ /*
++ * If we're in an interrupt, have no user context or are running in an
++ * atomic region then we must not take the fault.
++ */
++ if (in_atomic() || !mm)
++ goto bad_area_nosemaphore;
++#else /* CONFIG_X86_64 */
++ if (likely(regs->flags & X86_EFLAGS_IF))
++ local_irq_enable();
++
++ if (unlikely(error_code & PF_RSVD))
++ pgtable_bad(address, regs, error_code);
++
++ /*
++ * If we're in an interrupt, have no user context or are running in an
++ * atomic region then we must not take the fault.
++ */
++ if (unlikely(in_atomic() || !mm))
++ goto bad_area_nosemaphore;
++
++ /*
++ * User-mode registers count as a user access even for any
++ * potential system fault or CPU buglet.
++ */
++ if (user_mode_vm(regs))
++ error_code |= PF_USER;
++again:
++#endif
++ /* When running in the kernel we expect faults to occur only to
++ * addresses in user space. All other faults represent errors in the
++ * kernel and should generate an OOPS. Unfortunately, in the case of an
++ * erroneous fault occurring in a code path which already holds mmap_sem
++ * we will deadlock attempting to validate the fault against the
++ * address space. Luckily the kernel only validly references user
++ * space from well defined areas of code, which are listed in the
++ * exceptions table.
++ *
++ * As the vast majority of faults will be valid we will only perform
++ * the source reference check when there is a possibility of a deadlock.
++ * Attempt to lock the address space, if we cannot we then validate the
++ * source. If this is invalid we can skip the address space check,
++ * thus avoiding the deadlock.
++ */
++ if (!down_read_trylock(&mm->mmap_sem)) {
++ if ((error_code & PF_USER) == 0 &&
++ !search_exception_tables(regs->ip))
++ goto bad_area_nosemaphore;
++ down_read(&mm->mmap_sem);
++ }
++
++ vma = find_vma(mm, address);
++ if (!vma)
++ goto bad_area;
++ if (vma->vm_start <= address)
++ goto good_area;
++ if (!(vma->vm_flags & VM_GROWSDOWN))
++ goto bad_area;
++ if (error_code & PF_USER) {
++ /*
++ * Accessing the stack below %sp is always a bug.
++ * The large cushion allows instructions like enter
++ * and pusha to work. ("enter $65535,$31" pushes
++ * 32 pointers and then decrements %sp by 65535.)
++ */
++ if (address + 65536 + 32 * sizeof(unsigned long) < regs->sp)
++ goto bad_area;
++ }
++ if (expand_stack(vma, address))
++ goto bad_area;
++/*
++ * Ok, we have a good vm_area for this memory access, so
++ * we can handle it..
++ */
++good_area:
++ si_code = SEGV_ACCERR;
++ write = 0;
++ switch (error_code & (PF_PROT|PF_WRITE)) {
++ default: /* 3: write, present */
++ /* fall through */
++ case PF_WRITE: /* write, not present */
++ if (!(vma->vm_flags & VM_WRITE))
++ goto bad_area;
++ write++;
++ break;
++ case PF_PROT: /* read, present */
++ goto bad_area;
++ case 0: /* read, not present */
++ if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
++ goto bad_area;
++ }
++
++#ifdef CONFIG_X86_32
++survive:
++#endif
++ /*
++ * If for any reason at all we couldn't handle the fault,
++ * make sure we exit gracefully rather than endlessly redo
++ * the fault.
++ */
++ fault = handle_mm_fault(mm, vma, address, write);
++ if (unlikely(fault & VM_FAULT_ERROR)) {
++ if (fault & VM_FAULT_OOM)
++ goto out_of_memory;
++ else if (fault & VM_FAULT_SIGBUS)
++ goto do_sigbus;
++ BUG();
++ }
++ if (fault & VM_FAULT_MAJOR)
++ tsk->maj_flt++;
++ else
++ tsk->min_flt++;
++
++#ifdef CONFIG_X86_32
++ /*
++ * Did it hit the DOS screen memory VA from vm86 mode?
++ */
++ if (v8086_mode(regs)) {
++ unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
++ if (bit < 32)
++ tsk->thread.screen_bitmap |= 1 << bit;
++ }
++#endif
++ up_read(&mm->mmap_sem);
++ return;
++
++/*
++ * Something tried to access memory that isn't in our memory map..
++ * Fix it, but check if it's kernel or user first..
++ */
++bad_area:
++ up_read(&mm->mmap_sem);
++
++bad_area_nosemaphore:
++ /* User mode accesses just cause a SIGSEGV */
++ if (error_code & PF_USER) {
++ /*
++ * It's possible to have interrupts off here.
++ */
++ local_irq_enable();
++
++ /*
++ * Valid to do another page fault here because this one came
++ * from user space.
++ */
++ if (is_prefetch(regs, address, error_code))
++ return;
++
++ if (is_errata100(regs, address))
++ return;
++
++ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
++ printk_ratelimit()) {
++ printk(
++#ifdef CONFIG_X86_32
++ "%s%s[%d]: segfault at %lx ip %08lx sp %08lx error %lx",
++#else
++ "%s%s[%d]: segfault at %lx ip %lx sp %lx error %lx",
++#endif
++ task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
++ tsk->comm, task_pid_nr(tsk), address, regs->ip,
++ regs->sp, error_code);
++ print_vma_addr(" in ", regs->ip);
++ printk("\n");
++ }
++
++ tsk->thread.cr2 = address;
++ /* Kernel addresses are always protection faults */
++ tsk->thread.error_code = error_code | (address >= TASK_SIZE);
++ tsk->thread.trap_no = 14;
++ force_sig_info_fault(SIGSEGV, si_code, address, tsk);
++ return;
++ }
++
++ if (is_f00f_bug(regs, address))
++ return;
++
++no_context:
++ /* Are we prepared to handle this kernel fault? */
++ if (fixup_exception(regs))
++ return;
++
++ /*
++ * X86_32
++ * Valid to do another page fault here, because if this fault
++ * had been triggered by is_prefetch fixup_exception would have
++ * handled it.
++ *
++ * X86_64
++ * Hall of shame of CPU/BIOS bugs.
++ */
++ if (is_prefetch(regs, address, error_code))
++ return;
++
++ if (is_errata93(regs, address))
++ return;
++
++/*
++ * Oops. The kernel tried to access some bad page. We'll have to
++ * terminate things with extreme prejudice.
++ */
++#ifdef CONFIG_X86_32
++ bust_spinlocks(1);
++#else
++ flags = oops_begin();
++#endif
++
++ show_fault_oops(regs, error_code, address);
++
++ tsk->thread.cr2 = address;
++ tsk->thread.trap_no = 14;
++ tsk->thread.error_code = error_code;
++
++#ifdef CONFIG_X86_32
++ die("Oops", regs, error_code);
++ bust_spinlocks(0);
++ do_exit(SIGKILL);
++#else
++ if (__die("Oops", regs, error_code))
++ regs = NULL;
++ /* Executive summary in case the body of the oops scrolled away */
++ printk(KERN_EMERG "CR2: %016lx\n", address);
++ oops_end(flags, regs, SIGKILL);
++#endif
++
++/*
++ * We ran out of memory, or some other thing happened to us that made
++ * us unable to handle the page fault gracefully.
++ */
++out_of_memory:
++ up_read(&mm->mmap_sem);
++ if (is_global_init(tsk)) {
++ yield();
++#ifdef CONFIG_X86_32
++ down_read(&mm->mmap_sem);
++ goto survive;
++#else
++ goto again;
++#endif
++ }
++
++ printk("VM: killing process %s\n", tsk->comm);
++ if (error_code & PF_USER)
++ do_group_exit(SIGKILL);
++ goto no_context;
++
++do_sigbus:
++ up_read(&mm->mmap_sem);
++
++ /* Kernel mode? Handle exceptions or die */
++ if (!(error_code & PF_USER))
++ goto no_context;
++#ifdef CONFIG_X86_32
++ /* User space => ok to do another page fault */
++ if (is_prefetch(regs, address, error_code))
++ return;
++#endif
++ tsk->thread.cr2 = address;
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 14;
++ force_sig_info_fault(SIGBUS, BUS_ADRERR, address, tsk);
++}
++
++DEFINE_SPINLOCK(pgd_lock);
++LIST_HEAD(pgd_list);
++
++void vmalloc_sync_all(void)
++{
++#ifdef CONFIG_X86_32
++ /*
++ * Note that races in the updates of insync and start aren't
++ * problematic: insync can only get set bits added, and updates to
++ * start are only improving performance (without affecting correctness
++ * if undone).
++ * XEN: To work on PAE, we need to iterate over PMDs rather than PGDs.
++ * This change works just fine with 2-level paging too.
++ */
++#define sync_index(a) ((a) >> PMD_SHIFT)
++ static DECLARE_BITMAP(insync, PTRS_PER_PGD*PTRS_PER_PMD);
++ static unsigned long start = TASK_SIZE;
++ unsigned long address;
++
++ if (SHARED_KERNEL_PMD)
++ return;
++
++ BUILD_BUG_ON(TASK_SIZE & ~PMD_MASK);
++ for (address = start;
++ address < hypervisor_virt_start;
++ address += PMD_SIZE) {
++ if (!test_bit(sync_index(address), insync)) {
++ unsigned long flags;
++ struct page *page;
++
++ spin_lock_irqsave(&pgd_lock, flags);
++ /* XEN: failure path assumes non-empty pgd_list. */
++ if (unlikely(list_empty(&pgd_list))) {
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ return;
++ }
++ list_for_each_entry(page, &pgd_list, lru) {
++ if (!vmalloc_sync_one(page_address(page),
++ address))
++ break;
++ }
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ if (!page)
++ set_bit(sync_index(address), insync);
++ }
++ if (address == start && test_bit(sync_index(address), insync))
++ start = address + PMD_SIZE;
++ }
++#else /* CONFIG_X86_64 */
++ /*
++ * Note that races in the updates of insync and start aren't
++ * problematic: insync can only get set bits added, and updates to
++ * start are only improving performance (without affecting correctness
++ * if undone).
++ */
++ static DECLARE_BITMAP(insync, PTRS_PER_PGD);
++ static unsigned long start = VMALLOC_START & PGDIR_MASK;
++ unsigned long address;
++
++ for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
++ if (!test_bit(pgd_index(address), insync)) {
++ const pgd_t *pgd_ref = pgd_offset_k(address);
++ unsigned long flags;
++ struct page *page;
++
++ if (pgd_none(*pgd_ref))
++ continue;
++ spin_lock_irqsave(&pgd_lock, flags);
++ list_for_each_entry(page, &pgd_list, lru) {
++ pgd_t *pgd;
++ pgd = (pgd_t *)page_address(page) + pgd_index(address);
++ if (pgd_none(*pgd))
++ set_pgd(pgd, *pgd_ref);
++ else
++ BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
++ }
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ set_bit(pgd_index(address), insync);
++ }
++ if (address == start)
++ start = address + PGDIR_SIZE;
++ }
++ /* Check that there is no need to do the same for the modules area. */
++ BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL));
++ BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
++ (__START_KERNEL & PGDIR_MASK)));
++#endif
++}
+--- a/arch/x86/mm/highmem_32-xen.c
++++ b/arch/x86/mm/highmem_32-xen.c
+@@ -18,6 +18,49 @@ void kunmap(struct page *page)
+ kunmap_high(page);
+ }
+
++static void debug_kmap_atomic_prot(enum km_type type)
++{
++#ifdef CONFIG_DEBUG_HIGHMEM
++ static unsigned warn_count = 10;
++
++ if (unlikely(warn_count == 0))
++ return;
++
++ if (unlikely(in_interrupt())) {
++ if (in_irq()) {
++ if (type != KM_IRQ0 && type != KM_IRQ1 &&
++ type != KM_BIO_SRC_IRQ && type != KM_BIO_DST_IRQ &&
++ type != KM_BOUNCE_READ) {
++ WARN_ON(1);
++ warn_count--;
++ }
++ } else if (!irqs_disabled()) { /* softirq */
++ if (type != KM_IRQ0 && type != KM_IRQ1 &&
++ type != KM_SOFTIRQ0 && type != KM_SOFTIRQ1 &&
++ type != KM_SKB_SUNRPC_DATA &&
++ type != KM_SKB_DATA_SOFTIRQ &&
++ type != KM_BOUNCE_READ) {
++ WARN_ON(1);
++ warn_count--;
++ }
++ }
++ }
++
++ if (type == KM_IRQ0 || type == KM_IRQ1 || type == KM_BOUNCE_READ ||
++ type == KM_BIO_SRC_IRQ || type == KM_BIO_DST_IRQ) {
++ if (!irqs_disabled()) {
++ WARN_ON(1);
++ warn_count--;
++ }
++ } else if (type == KM_SOFTIRQ0 || type == KM_SOFTIRQ1) {
++ if (irq_count() == 0 && !irqs_disabled()) {
++ WARN_ON(1);
++ warn_count--;
++ }
++ }
++#endif
++}
++
+ /*
+ * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because
+ * no global lock is needed and because the kmap code must perform a global TLB
+@@ -37,6 +80,8 @@ void *kmap_atomic_prot(struct page *page
+ if (!PageHighMem(page))
+ return page_address(page);
+
++ debug_kmap_atomic_prot(type);
++
+ idx = type + KM_TYPE_NR*smp_processor_id();
+ vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
+ BUG_ON(!pte_none(*(kmap_pte-idx)));
+--- a/arch/x86/mm/hypervisor.c
++++ b/arch/x86/mm/hypervisor.c
+@@ -831,15 +831,11 @@ int xen_limit_pages_to_max_mfn(
+ }
+ EXPORT_SYMBOL_GPL(xen_limit_pages_to_max_mfn);
+
+-#ifdef __i386__
+-int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b)
++int write_ldt_entry(struct desc_struct *ldt, int entry, const void *desc)
+ {
+- __u32 *lp = (__u32 *)((char *)ldt + entry * 8);
+- maddr_t mach_lp = arbitrary_virt_to_machine(lp);
+- return HYPERVISOR_update_descriptor(
+- mach_lp, (u64)entry_a | ((u64)entry_b<<32));
++ maddr_t mach_lp = arbitrary_virt_to_machine(ldt + entry);
++ return HYPERVISOR_update_descriptor(mach_lp, *(const u64*)desc);
+ }
+-#endif
+
+ #define MAX_BATCHED_FULL_PTES 32
+
+--- a/arch/x86/mm/init_32-xen.c
++++ b/arch/x86/mm/init_32-xen.c
+@@ -27,13 +27,13 @@
+ #include <linux/bootmem.h>
+ #include <linux/slab.h>
+ #include <linux/proc_fs.h>
+-#include <linux/efi.h>
+ #include <linux/memory_hotplug.h>
+ #include <linux/initrd.h>
+ #include <linux/cpumask.h>
+ #include <linux/dma-mapping.h>
+ #include <linux/scatterlist.h>
+
++#include <asm/asm.h>
+ #include <asm/processor.h>
+ #include <asm/system.h>
+ #include <asm/uaccess.h>
+@@ -42,18 +42,22 @@
+ #include <asm/fixmap.h>
+ #include <asm/e820.h>
+ #include <asm/apic.h>
++#include <asm/bugs.h>
+ #include <asm/tlb.h>
+ #include <asm/tlbflush.h>
++#include <asm/pgalloc.h>
+ #include <asm/sections.h>
+ #include <asm/hypervisor.h>
+ #include <asm/swiotlb.h>
++#include <asm/setup.h>
++#include <asm/cacheflush.h>
+
+ unsigned int __VMALLOC_RESERVE = 128 << 20;
+
+ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+ unsigned long highstart_pfn, highend_pfn;
+
+-static int noinline do_test_wp_bit(void);
++static noinline int do_test_wp_bit(void);
+
+ /*
+ * Creates a middle page table and puts a pointer to it in the
+@@ -64,17 +68,16 @@ static pmd_t * __init one_md_table_init(
+ {
+ pud_t *pud;
+ pmd_t *pmd_table;
+-
++
+ #ifdef CONFIG_X86_PAE
+ if (!(__pgd_val(*pgd) & _PAGE_PRESENT)) {
+ pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+
+- paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
++ paravirt_alloc_pd(&init_mm, __pa(pmd_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(pmd_table, XENFEAT_writable_page_tables);
+ set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
+ pud = pud_offset(pgd, 0);
+- if (pmd_table != pmd_offset(pud, 0))
+- BUG();
++ BUG_ON(pmd_table != pmd_offset(pud, 0));
+ }
+ #endif
+ pud = pud_offset(pgd, 0);
+@@ -85,7 +88,7 @@ static pmd_t * __init one_md_table_init(
+
+ /*
+ * Create a page table and place a pointer to it in a middle page
+- * directory entry.
++ * directory entry:
+ */
+ static pte_t * __init one_page_table_init(pmd_t *pmd)
+ {
+@@ -99,9 +102,10 @@ static pte_t * __init one_page_table_ini
+ #ifdef CONFIG_DEBUG_PAGEALLOC
+ page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
+ #endif
+- if (!page_table)
++ if (!page_table) {
+ page_table =
+ (pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
++ }
+
+ paravirt_alloc_pt(&init_mm, __pa(page_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(page_table,
+@@ -114,22 +118,21 @@ static pte_t * __init one_page_table_ini
+ }
+
+ /*
+- * This function initializes a certain range of kernel virtual memory
++ * This function initializes a certain range of kernel virtual memory
+ * with new bootmem page tables, everywhere page tables are missing in
+ * the given range.
+- */
+-
+-/*
+- * NOTE: The pagetables are allocated contiguous on the physical space
+- * so we can cache the place of the first one and move around without
++ *
++ * NOTE: The pagetables are allocated contiguous on the physical space
++ * so we can cache the place of the first one and move around without
+ * checking the pgd every time.
+ */
+-static void __init page_table_range_init (unsigned long start, unsigned long end, pgd_t *pgd_base)
++static void __init
++page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd_base)
+ {
+- pgd_t *pgd;
+- pmd_t *pmd;
+ int pgd_idx, pmd_idx;
+ unsigned long vaddr;
++ pgd_t *pgd;
++ pmd_t *pmd;
+
+ vaddr = start;
+ pgd_idx = pgd_index(vaddr);
+@@ -139,7 +142,8 @@ static void __init page_table_range_init
+ for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd++, pgd_idx++) {
+ pmd = one_md_table_init(pgd);
+ pmd = pmd + pmd_index(vaddr);
+- for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end); pmd++, pmd_idx++) {
++ for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end);
++ pmd++, pmd_idx++) {
+ if (vaddr < hypervisor_virt_start)
+ one_page_table_init(pmd);
+
+@@ -157,17 +161,17 @@ static inline int is_kernel_text(unsigne
+ }
+
+ /*
+- * This maps the physical memory to kernel virtual address space, a total
+- * of max_low_pfn pages, by creating page tables starting from address
+- * PAGE_OFFSET.
++ * This maps the physical memory to kernel virtual address space, a total
++ * of max_low_pfn pages, by creating page tables starting from address
++ * PAGE_OFFSET:
+ */
+ static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
+ {
++ int pgd_idx, pmd_idx, pte_ofs;
+ unsigned long pfn;
+ pgd_t *pgd;
+ pmd_t *pmd;
+ pte_t *pte;
+- int pgd_idx, pmd_idx, pte_ofs;
+
+ unsigned long max_ram_pfn = xen_start_info->nr_pages;
+ if (max_ram_pfn > max_low_pfn)
+@@ -195,36 +199,49 @@ static void __init kernel_physical_mappi
+ if (pfn >= max_low_pfn)
+ continue;
+ pmd += pmd_idx;
+- for (; pmd_idx < PTRS_PER_PMD && pfn < max_low_pfn; pmd++, pmd_idx++) {
+- unsigned int address = pfn * PAGE_SIZE + PAGE_OFFSET;
+- if (address >= hypervisor_virt_start)
++ for (; pmd_idx < PTRS_PER_PMD && pfn < max_low_pfn;
++ pmd++, pmd_idx++) {
++ unsigned int addr = pfn * PAGE_SIZE + PAGE_OFFSET;
++
++ if (addr >= hypervisor_virt_start)
+ continue;
+
+- /* Map with big pages if possible, otherwise create normal page tables. */
++ /*
++ * Map with big pages if possible, otherwise
++ * create normal page tables:
++ */
+ if (cpu_has_pse) {
+- unsigned int address2 = (pfn + PTRS_PER_PTE - 1) * PAGE_SIZE + PAGE_OFFSET + PAGE_SIZE-1;
+- if (is_kernel_text(address) || is_kernel_text(address2))
+- set_pmd(pmd, pfn_pmd(pfn, PAGE_KERNEL_LARGE_EXEC));
+- else
+- set_pmd(pmd, pfn_pmd(pfn, PAGE_KERNEL_LARGE));
++ unsigned int addr2;
++ pgprot_t prot = PAGE_KERNEL_LARGE;
++
++ addr2 = (pfn + PTRS_PER_PTE-1) * PAGE_SIZE +
++ PAGE_OFFSET + PAGE_SIZE-1;
++
++ if (is_kernel_text(addr) ||
++ is_kernel_text(addr2))
++ prot = PAGE_KERNEL_LARGE_EXEC;
++
++ set_pmd(pmd, pfn_pmd(pfn, prot));
+
+ pfn += PTRS_PER_PTE;
+- } else {
+- pte = one_page_table_init(pmd);
++ continue;
++ }
++ pte = one_page_table_init(pmd);
++
++ for (pte += pte_ofs;
++ pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn;
++ pte++, pfn++, pte_ofs++, addr += PAGE_SIZE) {
++ pgprot_t prot = PAGE_KERNEL;
++
++ /* XEN: Only map initial RAM allocation. */
++ if ((pfn >= max_ram_pfn) || pte_present(*pte))
++ continue;
++ if (is_kernel_text(addr))
++ prot = PAGE_KERNEL_EXEC;
+
+- for (pte += pte_ofs;
+- pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn;
+- pte++, pfn++, pte_ofs++, address += PAGE_SIZE) {
+- /* XEN: Only map initial RAM allocation. */
+- if ((pfn >= max_ram_pfn) || pte_present(*pte))
+- continue;
+- if (is_kernel_text(address))
+- set_pte(pte, pfn_pte(pfn, PAGE_KERNEL_EXEC));
+- else
+- set_pte(pte, pfn_pte(pfn, PAGE_KERNEL));
+- }
+- pte_ofs = 0;
++ set_pte(pte, pfn_pte(pfn, prot));
+ }
++ pte_ofs = 0;
+ }
+ pmd_idx = 0;
+ }
+@@ -245,57 +262,23 @@ static inline int page_kills_ppro(unsign
+
+ #endif
+
+-int page_is_ram(unsigned long pagenr)
+-{
+- int i;
+- unsigned long addr, end;
+-
+- if (efi_enabled) {
+- efi_memory_desc_t *md;
+- void *p;
+-
+- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+- md = p;
+- if (!is_available_memory(md))
+- continue;
+- addr = (md->phys_addr+PAGE_SIZE-1) >> PAGE_SHIFT;
+- end = (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >> PAGE_SHIFT;
+-
+- if ((pagenr >= addr) && (pagenr < end))
+- return 1;
+- }
+- return 0;
+- }
+-
+- for (i = 0; i < e820.nr_map; i++) {
+-
+- if (e820.map[i].type != E820_RAM) /* not usable memory */
+- continue;
+- /*
+- * !!!FIXME!!! Some BIOSen report areas as RAM that
+- * are not. Notably the 640->1Mb area. We need a sanity
+- * check here.
+- */
+- addr = (e820.map[i].addr+PAGE_SIZE-1) >> PAGE_SHIFT;
+- end = (e820.map[i].addr+e820.map[i].size) >> PAGE_SHIFT;
+- if ((pagenr >= addr) && (pagenr < end))
+- return 1;
+- }
+- return 0;
+-}
+-
+ #ifdef CONFIG_HIGHMEM
+ pte_t *kmap_pte;
+ pgprot_t kmap_prot;
+
+-#define kmap_get_fixmap_pte(vaddr) \
+- pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), vaddr), (vaddr)), (vaddr))
++static inline pte_t *kmap_get_fixmap_pte(unsigned long vaddr)
++{
++ return pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr),
++ vaddr), vaddr), vaddr);
++}
+
+ static void __init kmap_init(void)
+ {
+ unsigned long kmap_vstart;
+
+- /* cache the first kmap pte */
++ /*
++ * Cache the first kmap pte:
++ */
+ kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN);
+ kmap_pte = kmap_get_fixmap_pte(kmap_vstart);
+
+@@ -304,11 +287,11 @@ static void __init kmap_init(void)
+
+ static void __init permanent_kmaps_init(pgd_t *pgd_base)
+ {
++ unsigned long vaddr;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+- unsigned long vaddr;
+
+ vaddr = PKMAP_BASE;
+ page_table_range_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base);
+@@ -317,7 +300,7 @@ static void __init permanent_kmaps_init(
+ pud = pud_offset(pgd, vaddr);
+ pmd = pmd_offset(pud, vaddr);
+ pte = pte_offset_kernel(pmd, vaddr);
+- pkmap_page_table = pte;
++ pkmap_page_table = pte;
+ }
+
+ static void __meminit free_new_highpage(struct page *page, int pfn)
+@@ -337,7 +320,8 @@ void __init add_one_highpage_init(struct
+ SetPageReserved(page);
+ }
+
+-static int __meminit add_one_highpage_hotplug(struct page *page, unsigned long pfn)
++static int __meminit
++add_one_highpage_hotplug(struct page *page, unsigned long pfn)
+ {
+ free_new_highpage(page, pfn);
+ totalram_pages++;
+@@ -345,6 +329,7 @@ static int __meminit add_one_highpage_ho
+ max_mapnr = max(pfn, max_mapnr);
+ #endif
+ num_physpages++;
++
+ return 0;
+ }
+
+@@ -352,7 +337,7 @@ static int __meminit add_one_highpage_ho
+ * Not currently handling the NUMA case.
+ * Assuming single node and all memory that
+ * has been added dynamically that would be
+- * onlined here is in HIGHMEM
++ * onlined here is in HIGHMEM.
+ */
+ void __meminit online_page(struct page *page)
+ {
+@@ -360,13 +345,11 @@ void __meminit online_page(struct page *
+ add_one_highpage_hotplug(page, page_to_pfn(page));
+ }
+
+-
+-#ifdef CONFIG_NUMA
+-extern void set_highmem_pages_init(int);
+-#else
++#ifndef CONFIG_NUMA
+ static void __init set_highmem_pages_init(int bad_ppro)
+ {
+ int pfn;
++
+ for (pfn = highstart_pfn; pfn < highend_pfn; pfn++) {
+ /*
+ * Holes under sparsemem might not have no mem_map[]:
+@@ -376,23 +359,18 @@ static void __init set_highmem_pages_ini
+ }
+ totalram_pages += totalhigh_pages;
+ }
+-#endif /* CONFIG_FLATMEM */
++#endif /* !CONFIG_NUMA */
+
+ #else
+-#define kmap_init() do { } while (0)
+-#define permanent_kmaps_init(pgd_base) do { } while (0)
+-#define set_highmem_pages_init(bad_ppro) do { } while (0)
++# define kmap_init() do { } while (0)
++# define permanent_kmaps_init(pgd_base) do { } while (0)
++# define set_highmem_pages_init(bad_ppro) do { } while (0)
+ #endif /* CONFIG_HIGHMEM */
+
+-unsigned long long __PAGE_KERNEL = _PAGE_KERNEL;
++pteval_t __PAGE_KERNEL = _PAGE_KERNEL;
+ EXPORT_SYMBOL(__PAGE_KERNEL);
+-unsigned long long __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC;
+
+-#ifdef CONFIG_NUMA
+-extern void __init remap_numa_kva(void);
+-#else
+-#define remap_numa_kva() do {} while (0)
+-#endif
++pteval_t __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC;
+
+ pgd_t *swapper_pg_dir;
+
+@@ -410,9 +388,8 @@ static void __init xen_pagetable_setup_d
+ * the boot process.
+ *
+ * If we're booting on native hardware, this will be a pagetable
+- * constructed in arch/i386/kernel/head.S, and not running in PAE mode
+- * (even if we'll end up running in PAE). The root of the pagetable
+- * will be swapper_pg_dir.
++ * constructed in arch/x86/kernel/head_32.S. The root of the
++ * pagetable will be swapper_pg_dir.
+ *
+ * If we're booting paravirtualized under a hypervisor, then there are
+ * more options: we may already be running PAE, and the pagetable may
+@@ -424,10 +401,10 @@ static void __init xen_pagetable_setup_d
+ * be partially populated, and so it avoids stomping on any existing
+ * mappings.
+ */
+-static void __init pagetable_init (void)
++static void __init pagetable_init(void)
+ {
+- unsigned long vaddr, end;
+ pgd_t *pgd_base = (pgd_t *)xen_start_info->pt_base;
++ unsigned long vaddr, end;
+
+ xen_pagetable_setup_start(pgd_base);
+
+@@ -449,34 +426,36 @@ static void __init pagetable_init (void)
+ * Fixed mappings, only the page table structure has to be
+ * created - mappings will be set by set_fixmap():
+ */
++ early_ioremap_clear();
+ vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
+ end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
+ page_table_range_init(vaddr, end, pgd_base);
++ early_ioremap_reset();
+
+ permanent_kmaps_init(pgd_base);
+
+ xen_pagetable_setup_done(pgd_base);
+ }
+
+-#if defined(CONFIG_HIBERNATION) || defined(CONFIG_ACPI)
++#if defined(CONFIG_ACPI_SLEEP) && !defined(CONFIG_XEN)
+ /*
+- * Swap suspend & friends need this for resume because things like the intel-agp
++ * ACPI suspend needs this for resume, because things like the intel-agp
+ * driver might have split up a kernel 4MB mapping.
+ */
+-char __nosavedata swsusp_pg_dir[PAGE_SIZE]
+- __attribute__ ((aligned (PAGE_SIZE)));
++char swsusp_pg_dir[PAGE_SIZE]
++ __attribute__ ((aligned(PAGE_SIZE)));
+
+ static inline void save_pg_dir(void)
+ {
+ memcpy(swsusp_pg_dir, swapper_pg_dir, PAGE_SIZE);
+ }
+-#else
++#else /* !CONFIG_ACPI_SLEEP */
+ static inline void save_pg_dir(void)
+ {
+ }
+-#endif
++#endif /* !CONFIG_ACPI_SLEEP */
+
+-void zap_low_mappings (void)
++void zap_low_mappings(void)
+ {
+ int i;
+
+@@ -488,22 +467,24 @@ void zap_low_mappings (void)
+ * Note that "pgd_clear()" doesn't do it for
+ * us, because pgd_clear() is a no-op on i386.
+ */
+- for (i = 0; i < USER_PTRS_PER_PGD; i++)
++ for (i = 0; i < USER_PTRS_PER_PGD; i++) {
+ #if defined(CONFIG_X86_PAE) && !defined(CONFIG_XEN)
+ set_pgd(swapper_pg_dir+i, __pgd(1 + __pa(empty_zero_page)));
+ #else
+ set_pgd(swapper_pg_dir+i, __pgd(0));
+ #endif
++ }
+ flush_tlb_all();
+ }
+
+-int nx_enabled = 0;
++int nx_enabled;
++
++pteval_t __supported_pte_mask __read_mostly = ~_PAGE_NX;
++EXPORT_SYMBOL_GPL(__supported_pte_mask);
+
+ #ifdef CONFIG_X86_PAE
+
+-static int disable_nx __initdata = 0;
+-u64 __supported_pte_mask __read_mostly = ~_PAGE_NX;
+-EXPORT_SYMBOL_GPL(__supported_pte_mask);
++static int disable_nx __initdata;
+
+ /*
+ * noexec = on|off
+@@ -520,11 +501,14 @@ static int __init noexec_setup(char *str
+ __supported_pte_mask |= _PAGE_NX;
+ disable_nx = 0;
+ }
+- } else if (!strcmp(str,"off")) {
+- disable_nx = 1;
+- __supported_pte_mask &= ~_PAGE_NX;
+- } else
+- return -EINVAL;
++ } else {
++ if (!strcmp(str, "off")) {
++ disable_nx = 1;
++ __supported_pte_mask &= ~_PAGE_NX;
++ } else {
++ return -EINVAL;
++ }
++ }
+
+ return 0;
+ }
+@@ -536,6 +520,7 @@ static void __init set_nx(void)
+
+ if (cpu_has_pae && (cpuid_eax(0x80000000) > 0x80000001)) {
+ cpuid(0x80000001, &v[0], &v[1], &v[2], &v[3]);
++
+ if ((v[3] & (1 << 20)) && !disable_nx) {
+ rdmsr(MSR_EFER, l, h);
+ l |= EFER_NX;
+@@ -545,35 +530,6 @@ static void __init set_nx(void)
+ }
+ }
+ }
+-
+-/*
+- * Enables/disables executability of a given kernel page and
+- * returns the previous setting.
+- */
+-int __init set_kernel_exec(unsigned long vaddr, int enable)
+-{
+- pte_t *pte;
+- int ret = 1;
+-
+- if (!nx_enabled)
+- goto out;
+-
+- pte = lookup_address(vaddr);
+- BUG_ON(!pte);
+-
+- if (!pte_exec_kernel(*pte))
+- ret = 0;
+-
+- if (enable)
+- pte->pte_high &= ~(1 << (_PAGE_BIT_NX - 32));
+- else
+- pte->pte_high |= 1 << (_PAGE_BIT_NX - 32);
+- pte_update_defer(&init_mm, vaddr, pte);
+- __flush_tlb_all();
+-out:
+- return ret;
+-}
+-
+ #endif
+
+ /*
+@@ -590,21 +546,10 @@ void __init paging_init(void)
+ #ifdef CONFIG_X86_PAE
+ set_nx();
+ if (nx_enabled)
+- printk("NX (Execute Disable) protection: active\n");
++ printk(KERN_INFO "NX (Execute Disable) protection: active\n");
+ #endif
+-
+ pagetable_init();
+
+-#if defined(CONFIG_X86_PAE) && !defined(CONFIG_XEN)
+- /*
+- * We will bail out later - printk doesn't work right now so
+- * the user would just see a hanging kernel.
+- * when running as xen domain we are already in PAE mode at
+- * this point.
+- */
+- if (cpu_has_pae)
+- set_in_cr4(X86_CR4_PAE);
+-#endif
+ __flush_tlb_all();
+
+ kmap_init();
+@@ -631,10 +576,10 @@ void __init paging_init(void)
+ * used to involve black magic jumps to work around some nasty CPU bugs,
+ * but fortunately the switch to using exceptions got rid of all that.
+ */
+-
+ static void __init test_wp_bit(void)
+ {
+- printk("Checking if this processor honours the WP bit even in supervisor mode... ");
++ printk(KERN_INFO
++ "Checking if this processor honours the WP bit even in supervisor mode...");
+
+ /* Any page-aligned address will do, the test is non-destructive */
+ __set_fixmap(FIX_WP_TEST, __pa(&swapper_pg_dir), PAGE_READONLY);
+@@ -642,23 +587,22 @@ static void __init test_wp_bit(void)
+ clear_fixmap(FIX_WP_TEST);
+
+ if (!boot_cpu_data.wp_works_ok) {
+- printk("No.\n");
++ printk(KERN_CONT "No.\n");
+ #ifdef CONFIG_X86_WP_WORKS_OK
+- panic("This kernel doesn't support CPU's with broken WP. Recompile it for a 386!");
++ panic(
++ "This kernel doesn't support CPU's with broken WP. Recompile it for a 386!");
+ #endif
+ } else {
+- printk("Ok.\n");
++ printk(KERN_CONT "Ok.\n");
+ }
+ }
+
+-static struct kcore_list kcore_mem, kcore_vmalloc;
++static struct kcore_list kcore_mem, kcore_vmalloc;
+
+ void __init mem_init(void)
+ {
+- extern int ppro_with_ram_bug(void);
+ int codesize, reservedpages, datasize, initsize;
+- int tmp;
+- int bad_ppro;
++ int tmp, bad_ppro;
+ unsigned long pfn;
+
+ #if defined(CONFIG_SWIOTLB)
+@@ -668,19 +612,19 @@ void __init mem_init(void)
+ #ifdef CONFIG_FLATMEM
+ BUG_ON(!mem_map);
+ #endif
+-
+ bad_ppro = ppro_with_ram_bug();
+
+ #ifdef CONFIG_HIGHMEM
+ /* check that fixmap and pkmap do not overlap */
+- if (PKMAP_BASE+LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
+- printk(KERN_ERR "fixmap and kmap areas overlap - this will crash\n");
++ if (PKMAP_BASE + LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
++ printk(KERN_ERR
++ "fixmap and kmap areas overlap - this will crash\n");
+ printk(KERN_ERR "pkstart: %lxh pkend: %lxh fixstart %lxh\n",
+- PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE, FIXADDR_START);
++ PKMAP_BASE, PKMAP_BASE + LAST_PKMAP*PAGE_SIZE,
++ FIXADDR_START);
+ BUG();
+ }
+ #endif
+-
+ /* this will put all low memory onto the freelists */
+ totalram_pages += free_all_bootmem();
+ /* XEN: init and count low-mem pages outside initial allocation. */
+@@ -693,7 +637,7 @@ void __init mem_init(void)
+ reservedpages = 0;
+ for (tmp = 0; tmp < max_low_pfn; tmp++)
+ /*
+- * Only count reserved RAM pages
++ * Only count reserved RAM pages:
+ */
+ if (page_is_ram(tmp) && PageReserved(pfn_to_page(tmp)))
+ reservedpages++;
+@@ -704,11 +648,12 @@ void __init mem_init(void)
+ datasize = (unsigned long) &_edata - (unsigned long) &_etext;
+ initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
+
+- kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
+- kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
++ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
++ kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
+ VMALLOC_END-VMALLOC_START);
+
+- printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init, %ldk highmem)\n",
++ printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
++ "%dk reserved, %dk data, %dk init, %ldk highmem)\n",
+ (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
+ num_physpages << (PAGE_SHIFT-10),
+ codesize >> 10,
+@@ -719,54 +664,53 @@ void __init mem_init(void)
+ );
+
+ #if 1 /* double-sanity-check paranoia */
+- printk("virtual kernel memory layout:\n"
+- " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
++ printk(KERN_INFO "virtual kernel memory layout:\n"
++ " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
+ #ifdef CONFIG_HIGHMEM
+- " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
++ " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
+ #endif
+- " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
+- " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
+- " .init : 0x%08lx - 0x%08lx (%4ld kB)\n"
+- " .data : 0x%08lx - 0x%08lx (%4ld kB)\n"
+- " .text : 0x%08lx - 0x%08lx (%4ld kB)\n",
+- FIXADDR_START, FIXADDR_TOP,
+- (FIXADDR_TOP - FIXADDR_START) >> 10,
++ " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
++ " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
++ " .init : 0x%08lx - 0x%08lx (%4ld kB)\n"
++ " .data : 0x%08lx - 0x%08lx (%4ld kB)\n"
++ " .text : 0x%08lx - 0x%08lx (%4ld kB)\n",
++ FIXADDR_START, FIXADDR_TOP,
++ (FIXADDR_TOP - FIXADDR_START) >> 10,
+
+ #ifdef CONFIG_HIGHMEM
+- PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
+- (LAST_PKMAP*PAGE_SIZE) >> 10,
++ PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
++ (LAST_PKMAP*PAGE_SIZE) >> 10,
+ #endif
+
+- VMALLOC_START, VMALLOC_END,
+- (VMALLOC_END - VMALLOC_START) >> 20,
++ VMALLOC_START, VMALLOC_END,
++ (VMALLOC_END - VMALLOC_START) >> 20,
+
+- (unsigned long)__va(0), (unsigned long)high_memory,
+- ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20,
++ (unsigned long)__va(0), (unsigned long)high_memory,
++ ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20,
+
+- (unsigned long)&__init_begin, (unsigned long)&__init_end,
+- ((unsigned long)&__init_end - (unsigned long)&__init_begin) >> 10,
++ (unsigned long)&__init_begin, (unsigned long)&__init_end,
++ ((unsigned long)&__init_end -
++ (unsigned long)&__init_begin) >> 10,
+
+- (unsigned long)&_etext, (unsigned long)&_edata,
+- ((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
++ (unsigned long)&_etext, (unsigned long)&_edata,
++ ((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
+
+- (unsigned long)&_text, (unsigned long)&_etext,
+- ((unsigned long)&_etext - (unsigned long)&_text) >> 10);
++ (unsigned long)&_text, (unsigned long)&_etext,
++ ((unsigned long)&_etext - (unsigned long)&_text) >> 10);
+
+ #ifdef CONFIG_HIGHMEM
+- BUG_ON(PKMAP_BASE+LAST_PKMAP*PAGE_SIZE > FIXADDR_START);
+- BUG_ON(VMALLOC_END > PKMAP_BASE);
++ BUG_ON(PKMAP_BASE + LAST_PKMAP*PAGE_SIZE > FIXADDR_START);
++ BUG_ON(VMALLOC_END > PKMAP_BASE);
+ #endif
+- BUG_ON(VMALLOC_START > VMALLOC_END);
+- BUG_ON((unsigned long)high_memory > VMALLOC_START);
++ BUG_ON(VMALLOC_START > VMALLOC_END);
++ BUG_ON((unsigned long)high_memory > VMALLOC_START);
+ #endif /* double-sanity-check paranoia */
+
+-#ifdef CONFIG_X86_PAE
+- if (!cpu_has_pae)
+- panic("cannot execute a PAE-enabled kernel on a PAE-less CPU!");
+-#endif
+ if (boot_cpu_data.wp_works_ok < 0)
+ test_wp_bit();
+
++ cpa_init();
++
+ /*
+ * Subtle. SMP is doing it's boot stuff late (because it has to
+ * fork idle threads) - but it also needs low mappings for the
+@@ -790,49 +734,35 @@ int arch_add_memory(int nid, u64 start,
+
+ return __add_pages(zone, start_pfn, nr_pages);
+ }
+-
+ #endif
+
+-struct kmem_cache *pmd_cache;
+-
+-void __init pgtable_cache_init(void)
+-{
+- if (PTRS_PER_PMD > 1)
+- pmd_cache = kmem_cache_create("pmd",
+- PTRS_PER_PMD*sizeof(pmd_t),
+- PTRS_PER_PMD*sizeof(pmd_t),
+- SLAB_PANIC,
+- pmd_ctor);
+-}
+-
+ /*
+ * This function cannot be __init, since exceptions don't work in that
+ * section. Put this after the callers, so that it cannot be inlined.
+ */
+-static int noinline do_test_wp_bit(void)
++static noinline int do_test_wp_bit(void)
+ {
+ char tmp_reg;
+ int flag;
+
+ __asm__ __volatile__(
+- " movb %0,%1 \n"
+- "1: movb %1,%0 \n"
+- " xorl %2,%2 \n"
++ " movb %0, %1 \n"
++ "1: movb %1, %0 \n"
++ " xorl %2, %2 \n"
+ "2: \n"
+- ".section __ex_table,\"a\"\n"
+- " .align 4 \n"
+- " .long 1b,2b \n"
+- ".previous \n"
++ _ASM_EXTABLE(1b,2b)
+ :"=m" (*(char *)fix_to_virt(FIX_WP_TEST)),
+ "=q" (tmp_reg),
+ "=r" (flag)
+ :"2" (1)
+ :"memory");
+-
++
+ return flag;
+ }
+
+ #ifdef CONFIG_DEBUG_RODATA
++const int rodata_test_data = 0xC3;
++EXPORT_SYMBOL_GPL(rodata_test_data);
+
+ void mark_rodata_ro(void)
+ {
+@@ -845,32 +775,58 @@ void mark_rodata_ro(void)
+ if (num_possible_cpus() <= 1)
+ #endif
+ {
+- change_page_attr(virt_to_page(start),
+- size >> PAGE_SHIFT, PAGE_KERNEL_RX);
+- printk("Write protecting the kernel text: %luk\n", size >> 10);
++ set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
++ printk(KERN_INFO "Write protecting the kernel text: %luk\n",
++ size >> 10);
++
++#ifdef CONFIG_CPA_DEBUG
++ printk(KERN_INFO "Testing CPA: Reverting %lx-%lx\n",
++ start, start+size);
++ set_pages_rw(virt_to_page(start), size>>PAGE_SHIFT);
++
++ printk(KERN_INFO "Testing CPA: write protecting again\n");
++ set_pages_ro(virt_to_page(start), size>>PAGE_SHIFT);
++#endif
+ }
+ #endif
+ start += size;
+ size = (unsigned long)__end_rodata - start;
+- change_page_attr(virt_to_page(start),
+- size >> PAGE_SHIFT, PAGE_KERNEL_RO);
+- printk("Write protecting the kernel read-only data: %luk\n",
+- size >> 10);
++ set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
++ printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
++ size >> 10);
++ rodata_test();
++
++#ifdef CONFIG_CPA_DEBUG
++ printk(KERN_INFO "Testing CPA: undo %lx-%lx\n", start, start + size);
++ set_pages_rw(virt_to_page(start), size >> PAGE_SHIFT);
+
+- /*
+- * change_page_attr() requires a global_flush_tlb() call after it.
+- * We do this after the printk so that if something went wrong in the
+- * change, the printk gets out at least to give a better debug hint
+- * of who is the culprit.
+- */
+- global_flush_tlb();
++ printk(KERN_INFO "Testing CPA: write protecting again\n");
++ set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
++#endif
+ }
+ #endif
+
+ void free_init_pages(char *what, unsigned long begin, unsigned long end)
+ {
++#ifdef CONFIG_DEBUG_PAGEALLOC
++ /*
++ * If debugging page accesses then do not free this memory but
++ * mark them not present - any buggy init-section access will
++ * create a kernel page fault:
++ */
++ printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n",
++ begin, PAGE_ALIGN(end));
++ set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
++#else
+ unsigned long addr;
+
++ /*
++ * We just marked the kernel text read only above, now that
++ * we are going to free part of that, we need to make that
++ * writeable first.
++ */
++ set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);
++
+ for (addr = begin; addr < end; addr += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(addr));
+ init_page_count(virt_to_page(addr));
+@@ -879,6 +835,7 @@ void free_init_pages(char *what, unsigne
+ totalram_pages++;
+ }
+ printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
++#endif
+ }
+
+ void free_initmem(void)
+@@ -894,4 +851,3 @@ void free_initrd_mem(unsigned long start
+ free_init_pages("initrd memory", start, end);
+ }
+ #endif
+-
+--- a/arch/x86/mm/init_64-xen.c
++++ b/arch/x86/mm/init_64-xen.c
+@@ -46,14 +46,13 @@
+ #include <asm/proto.h>
+ #include <asm/smp.h>
+ #include <asm/sections.h>
++#include <asm/kdebug.h>
++#include <asm/numa.h>
++#include <asm/cacheflush.h>
+
+ #include <xen/features.h>
+
+-#ifndef Dprintk
+-#define Dprintk(x...)
+-#endif
+-
+-const struct dma_mapping_ops* dma_ops;
++const struct dma_mapping_ops *dma_ops;
+ EXPORT_SYMBOL(dma_ops);
+
+ #if CONFIG_XEN_COMPAT <= 0x030002
+@@ -80,7 +79,21 @@ extern pte_t level1_fixmap_pgt[PTRS_PER_
+ (((mfn_to_pfn((addr) >> PAGE_SHIFT)) << PAGE_SHIFT) + \
+ __START_KERNEL_map)))
+
+-static void __meminit early_make_page_readonly(void *va, unsigned int feature)
++pmd_t *__init early_get_pmd(unsigned long va)
++{
++ unsigned long addr;
++ unsigned long *page = (unsigned long *)init_level4_pgt;
++
++ addr = page[pgd_index(va)];
++ addr_to_page(addr, page);
++
++ addr = page[pud_index(va)];
++ addr_to_page(addr, page);
++
++ return (pmd_t *)&page[pmd_index(va)];
++}
++
++void __meminit early_make_page_readonly(void *va, unsigned int feature)
+ {
+ unsigned long addr, _va = (unsigned long)va;
+ pte_t pte, *ptep;
+@@ -107,76 +120,6 @@ static void __meminit early_make_page_re
+ BUG();
+ }
+
+-static void __make_page_readonly(void *va)
+-{
+- pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t pte, *ptep;
+- unsigned long addr = (unsigned long) va;
+-
+- pgd = pgd_offset_k(addr);
+- pud = pud_offset(pgd, addr);
+- pmd = pmd_offset(pud, addr);
+- ptep = pte_offset_kernel(pmd, addr);
+-
+- pte.pte = ptep->pte & ~_PAGE_RW;
+- if (HYPERVISOR_update_va_mapping(addr, pte, 0))
+- xen_l1_entry_update(ptep, pte); /* fallback */
+-
+- if ((addr >= VMALLOC_START) && (addr < VMALLOC_END))
+- __make_page_readonly(__va(pte_pfn(pte) << PAGE_SHIFT));
+-}
+-
+-static void __make_page_writable(void *va)
+-{
+- pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t pte, *ptep;
+- unsigned long addr = (unsigned long) va;
+-
+- pgd = pgd_offset_k(addr);
+- pud = pud_offset(pgd, addr);
+- pmd = pmd_offset(pud, addr);
+- ptep = pte_offset_kernel(pmd, addr);
+-
+- pte.pte = ptep->pte | _PAGE_RW;
+- if (HYPERVISOR_update_va_mapping(addr, pte, 0))
+- xen_l1_entry_update(ptep, pte); /* fallback */
+-
+- if ((addr >= VMALLOC_START) && (addr < VMALLOC_END))
+- __make_page_writable(__va(pte_pfn(pte) << PAGE_SHIFT));
+-}
+-
+-void make_page_readonly(void *va, unsigned int feature)
+-{
+- if (!xen_feature(feature))
+- __make_page_readonly(va);
+-}
+-
+-void make_page_writable(void *va, unsigned int feature)
+-{
+- if (!xen_feature(feature))
+- __make_page_writable(va);
+-}
+-
+-void make_pages_readonly(void *va, unsigned nr, unsigned int feature)
+-{
+- if (xen_feature(feature))
+- return;
+-
+- while (nr-- != 0) {
+- __make_page_readonly(va);
+- va = (void*)((unsigned long)va + PAGE_SIZE);
+- }
+-}
+-
+-void make_pages_writable(void *va, unsigned nr, unsigned int feature)
+-{
+- if (xen_feature(feature))
+- return;
+-
+- while (nr-- != 0) {
+- __make_page_writable(va);
+- va = (void*)((unsigned long)va + PAGE_SIZE);
+- }
+-}
+-
+ /*
+ * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the
+ * physical space so we can cache the place of the first one and move
+@@ -187,22 +130,26 @@ void show_mem(void)
+ {
+ long i, total = 0, reserved = 0;
+ long shared = 0, cached = 0;
+- pg_data_t *pgdat;
+ struct page *page;
++ pg_data_t *pgdat;
+
+ printk(KERN_INFO "Mem-info:\n");
+ show_free_areas();
+- printk(KERN_INFO "Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
++ printk(KERN_INFO "Free swap: %6ldkB\n",
++ nr_swap_pages << (PAGE_SHIFT-10));
+
+ for_each_online_pgdat(pgdat) {
+- for (i = 0; i < pgdat->node_spanned_pages; ++i) {
+- /* this loop can take a while with 256 GB and 4k pages
+- so update the NMI watchdog */
+- if (unlikely(i % MAX_ORDER_NR_PAGES == 0)) {
++ for (i = 0; i < pgdat->node_spanned_pages; ++i) {
++ /*
++ * This loop can take a while with 256 GB and
++ * 4k pages so defer the NMI watchdog:
++ */
++ if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
+ touch_nmi_watchdog();
+- }
++
+ if (!pfn_valid(pgdat->node_start_pfn + i))
+ continue;
++
+ page = pfn_to_page(pgdat->node_start_pfn + i);
+ total++;
+ if (PageReserved(page))
+@@ -211,58 +158,67 @@ void show_mem(void)
+ cached++;
+ else if (page_count(page))
+ shared += page_count(page) - 1;
+- }
++ }
+ }
+- printk(KERN_INFO "%lu pages of RAM\n", total);
+- printk(KERN_INFO "%lu reserved pages\n",reserved);
+- printk(KERN_INFO "%lu pages shared\n",shared);
+- printk(KERN_INFO "%lu pages swap cached\n",cached);
++ printk(KERN_INFO "%lu pages of RAM\n", total);
++ printk(KERN_INFO "%lu reserved pages\n", reserved);
++ printk(KERN_INFO "%lu pages shared\n", shared);
++ printk(KERN_INFO "%lu pages swap cached\n", cached);
+ }
+
++static unsigned long __meminitdata table_start;
++static unsigned long __meminitdata table_end;
+
+ static __init void *spp_getpage(void)
+-{
++{
+ void *ptr;
++
+ if (after_bootmem)
+- ptr = (void *) get_zeroed_page(GFP_ATOMIC);
++ ptr = (void *) get_zeroed_page(GFP_ATOMIC);
+ else if (start_pfn < table_end) {
+ ptr = __va(start_pfn << PAGE_SHIFT);
+ start_pfn++;
+ memset(ptr, 0, PAGE_SIZE);
+ } else
+ ptr = alloc_bootmem_pages(PAGE_SIZE);
+- if (!ptr || ((unsigned long)ptr & ~PAGE_MASK))
+- panic("set_pte_phys: cannot allocate page data %s\n", after_bootmem?"after bootmem":"");
+
+- Dprintk("spp_getpage %p\n", ptr);
++ if (!ptr || ((unsigned long)ptr & ~PAGE_MASK)) {
++ panic("set_pte_phys: cannot allocate page data %s\n",
++ after_bootmem ? "after bootmem" : "");
++ }
++
++ pr_debug("spp_getpage %p\n", ptr);
++
+ return ptr;
+-}
++}
+
+ #define pgd_offset_u(address) (__user_pgd(init_level4_pgt) + pgd_index(address))
+ #define pud_offset_u(address) (level3_user_pgt + pud_index(address))
+
+-static __init void set_pte_phys(unsigned long vaddr,
+- unsigned long phys, pgprot_t prot, int user_mode)
++static __init void
++set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot, int user_mode)
+ {
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte, new_pte;
+
+- Dprintk("set_pte_phys %lx to %lx\n", vaddr, phys);
++ pr_debug("set_pte_phys %lx to %lx\n", vaddr, phys);
+
+ pgd = (user_mode ? pgd_offset_u(vaddr) : pgd_offset_k(vaddr));
+ if (pgd_none(*pgd)) {
+- printk("PGD FIXMAP MISSING, it should be setup in head.S!\n");
++ printk(KERN_ERR
++ "PGD FIXMAP MISSING, it should be setup in head.S!\n");
+ return;
+ }
+ pud = (user_mode ? pud_offset_u(vaddr) : pud_offset(pgd, vaddr));
+ if (pud_none(*pud)) {
+- pmd = (pmd_t *) spp_getpage();
++ pmd = (pmd_t *) spp_getpage();
+ make_page_readonly(pmd, XENFEAT_writable_page_tables);
+ set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
+ if (pmd != pmd_offset(pud, 0)) {
+- printk("PAGETABLE BUG #01! %p <-> %p\n", pmd, pmd_offset(pud,0));
++ printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n",
++ pmd, pmd_offset(pud, 0));
+ return;
+ }
+ }
+@@ -272,7 +228,7 @@ static __init void set_pte_phys(unsigned
+ make_page_readonly(pte, XENFEAT_writable_page_tables);
+ set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
+ if (pte != pte_offset_kernel(pmd, 0)) {
+- printk("PAGETABLE BUG #02!\n");
++ printk(KERN_ERR "PAGETABLE BUG #02!\n");
+ return;
+ }
+ }
+@@ -294,30 +250,30 @@ static __init void set_pte_phys(unsigned
+ __flush_tlb_one(vaddr);
+ }
+
+-static __init void set_pte_phys_ma(unsigned long vaddr,
+- unsigned long phys, pgprot_t prot)
++static __init void
++set_pte_phys_ma(unsigned long vaddr, unsigned long phys, pgprot_t prot)
+ {
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte, new_pte;
+
+- Dprintk("set_pte_phys %lx to %lx\n", vaddr, phys);
++ pr_debug("set_pte_phys_ma %lx to %lx\n", vaddr, phys);
+
+ pgd = pgd_offset_k(vaddr);
+ if (pgd_none(*pgd)) {
+- printk("PGD FIXMAP MISSING, it should be setup in head.S!\n");
++ printk(KERN_ERR
++ "PGD FIXMAP MISSING, it should be setup in head.S!\n");
+ return;
+ }
+ pud = pud_offset(pgd, vaddr);
+ if (pud_none(*pud)) {
+-
+- pmd = (pmd_t *) spp_getpage();
++ pmd = (pmd_t *) spp_getpage();
+ make_page_readonly(pmd, XENFEAT_writable_page_tables);
+ set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
+ if (pmd != pmd_offset(pud, 0)) {
+- printk("PAGETABLE BUG #01! %p <-> %p\n", pmd, pmd_offset(pud,0));
+- return;
++ printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n",
++ pmd, pmd_offset(pud, 0));
+ }
+ }
+ pmd = pmd_offset(pud, vaddr);
+@@ -326,7 +282,7 @@ static __init void set_pte_phys_ma(unsig
+ make_page_readonly(pte, XENFEAT_writable_page_tables);
+ set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
+ if (pte != pte_offset_kernel(pmd, 0)) {
+- printk("PAGETABLE BUG #02!\n");
++ printk(KERN_ERR "PAGETABLE BUG #02!\n");
+ return;
+ }
+ }
+@@ -350,14 +306,44 @@ static __init void set_pte_phys_ma(unsig
+ __flush_tlb_one(vaddr);
+ }
+
++#ifndef CONFIG_XEN
++/*
++ * The head.S code sets up the kernel high mapping:
++ *
++ * from __START_KERNEL_map to __START_KERNEL_map + size (== _end-_text)
++ *
++ * phys_addr holds the negative offset to the kernel, which is added
++ * to the compile time generated pmds. This results in invalid pmds up
++ * to the point where we hit the physaddr 0 mapping.
++ *
++ * We limit the mappings to the region from _text to _end. _end is
++ * rounded up to the 2MB boundary. This catches the invalid pmds as
++ * well, as they are located before _text:
++ */
++void __init cleanup_highmap(void)
++{
++ unsigned long vaddr = __START_KERNEL_map;
++ unsigned long end = round_up((unsigned long)_end, PMD_SIZE) - 1;
++ pmd_t *pmd = level2_kernel_pgt;
++ pmd_t *last_pmd = pmd + PTRS_PER_PMD;
++
++ for (; pmd < last_pmd; pmd++, vaddr += PMD_SIZE) {
++ if (!pmd_present(*pmd))
++ continue;
++ if (vaddr < (unsigned long) _text || vaddr > end)
++ set_pmd(pmd, __pmd(0));
++ }
++}
++#endif
++
+ /* NOTE: this is meant to be run only at boot */
+-void __init
+-__set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
++void __init
++__set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
+ {
+ unsigned long address = __fix_to_virt(idx);
+
+ if (idx >= __end_of_fixed_addresses) {
+- printk("Invalid __set_fixmap\n");
++ printk(KERN_ERR "Invalid __set_fixmap\n");
+ return;
+ }
+ switch (idx) {
+@@ -375,16 +361,14 @@ __set_fixmap (enum fixed_addresses idx,
+ }
+ }
+
+-unsigned long __meminitdata table_start, table_end;
+-
+ static __meminit void *alloc_static_page(unsigned long *phys)
+ {
+ unsigned long va = (start_pfn << PAGE_SHIFT) + __START_KERNEL_map;
+
+ if (after_bootmem) {
+ void *adr = (void *)get_zeroed_page(GFP_ATOMIC);
+-
+ *phys = __pa(adr);
++
+ return adr;
+ }
+
+@@ -396,7 +380,7 @@ static __meminit void *alloc_static_page
+
+ #define PTE_SIZE PAGE_SIZE
+
+-static inline int make_readonly(unsigned long paddr)
++static inline int __meminit make_readonly(unsigned long paddr)
+ {
+ extern char __vsyscall_0;
+ int readonly = 0;
+@@ -430,33 +414,38 @@ static inline int make_readonly(unsigned
+ /* Must run before zap_low_mappings */
+ __meminit void *early_ioremap(unsigned long addr, unsigned long size)
+ {
+- unsigned long vaddr;
+ pmd_t *pmd, *last_pmd;
++ unsigned long vaddr;
+ int i, pmds;
+
+ pmds = ((addr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
+ vaddr = __START_KERNEL_map;
+ pmd = level2_kernel_pgt;
+ last_pmd = level2_kernel_pgt + PTRS_PER_PMD - 1;
++
+ for (; pmd <= last_pmd; pmd++, vaddr += PMD_SIZE) {
+ for (i = 0; i < pmds; i++) {
+ if (pmd_present(pmd[i]))
+- goto next;
++ goto continue_outer_loop;
+ }
+ vaddr += addr & ~PMD_MASK;
+ addr &= PMD_MASK;
++
+ for (i = 0; i < pmds; i++, addr += PMD_SIZE)
+- set_pmd(pmd + i,__pmd(addr | _KERNPG_TABLE | _PAGE_PSE));
+- __flush_tlb();
++ set_pmd(pmd+i, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC));
++ __flush_tlb_all();
++
+ return (void *)vaddr;
+- next:
++continue_outer_loop:
+ ;
+ }
+ printk("early_ioremap(0x%lx, %lu) failed\n", addr, size);
+ return NULL;
+ }
+
+-/* To avoid virtual aliases later */
++/*
++ * To avoid virtual aliases later:
++ */
+ __meminit void early_iounmap(void *addr, unsigned long size)
+ {
+ unsigned long vaddr;
+@@ -466,9 +455,11 @@ __meminit void early_iounmap(void *addr,
+ vaddr = (unsigned long)addr;
+ pmds = ((vaddr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
+ pmd = level2_kernel_pgt + pmd_index(vaddr);
++
+ for (i = 0; i < pmds; i++)
+ pmd_clear(pmd + i);
+- __flush_tlb();
++
++ __flush_tlb_all();
+ }
+ #endif
+
+@@ -517,18 +508,19 @@ phys_pmd_init(pmd_t *pmd_page, unsigned
+ static void __meminit
+ phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end)
+ {
+- pmd_t *pmd = pmd_offset(pud,0);
++ pmd_t *pmd = pmd_offset(pud, 0);
+ spin_lock(&init_mm.page_table_lock);
+ phys_pmd_init(pmd, address, end);
+ spin_unlock(&init_mm.page_table_lock);
+ __flush_tlb_all();
+ }
+
+-static void __meminit phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end)
+-{
++static void __meminit
++phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end)
++{
+ int i = pud_index(addr);
+
+- for (; i < PTRS_PER_PUD; i++, addr = (addr & PUD_MASK) + PUD_SIZE ) {
++ for (; i < PTRS_PER_PUD; i++, addr = (addr & PUD_MASK) + PUD_SIZE) {
+ unsigned long pmd_phys;
+ pud_t *pud = pud_page + pud_index(addr);
+ pmd_t *pmd;
+@@ -550,8 +542,8 @@ static void __meminit phys_pud_init(pud_
+
+ early_make_page_readonly(pmd, XENFEAT_writable_page_tables);
+ }
+- __flush_tlb();
+-}
++ __flush_tlb_all();
++}
+
+ void __init xen_init_pt(void)
+ {
+@@ -632,6 +624,7 @@ void __init xen_init_pt(void)
+ static void __init extend_init_mapping(unsigned long tables_space)
+ {
+ unsigned long va = __START_KERNEL_map;
++ unsigned long start = start_pfn;
+ unsigned long phys, addr, *pte_page;
+ pmd_t *pmd;
+ pte_t *pte, new_pte;
+@@ -682,6 +675,10 @@ static void __init extend_init_mapping(u
+ BUG();
+ va += PAGE_SIZE;
+ }
++
++ if (start_pfn > start)
++ reserve_early(start << PAGE_SHIFT,
++ start_pfn << PAGE_SHIFT, "INITMAP");
+ }
+
+ static void __init find_early_table_space(unsigned long end)
+@@ -706,7 +703,7 @@ static void __init find_early_table_spac
+ (table_start << PAGE_SHIFT) + tables);
+ }
+
+-static void xen_finish_init_mapping(void)
++static void __init xen_finish_init_mapping(void)
+ {
+ unsigned long i, start, end;
+
+@@ -742,8 +739,10 @@ static void xen_finish_init_mapping(void
+ * Prefetch pte's for the bt_ioremap() area. It gets used before the
+ * boot-time allocator is online, so allocate-on-demand would fail.
+ */
++ early_ioremap_clear();
+ for (i = FIX_BTMAP_END; i <= FIX_BTMAP_BEGIN; i++)
+ __set_fixmap(i, 0, __pgprot(0));
++ early_ioremap_reset();
+
+ /* Switch to the real shared_info page, and clear the dummy page. */
+ set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info);
+@@ -764,20 +763,23 @@ static void xen_finish_init_mapping(void
+ table_end = start_pfn;
+ }
+
+-/* Setup the direct mapping of the physical memory at PAGE_OFFSET.
+- This runs before bootmem is initialized and gets pages directly from the
+- physical memory. To access them they are temporarily mapped. */
++/*
++ * Setup the direct mapping of the physical memory at PAGE_OFFSET.
++ * This runs before bootmem is initialized and gets pages directly from
++ * the physical memory. To access them they are temporarily mapped.
++ */
+ void __init_refok init_memory_mapping(unsigned long start, unsigned long end)
+-{
++{
+ unsigned long next;
+
+- Dprintk("init_memory_mapping\n");
++ pr_debug("init_memory_mapping\n");
+
+- /*
++ /*
+ * Find space for the kernel direct mapping tables.
+- * Later we should allocate these tables in the local node of the memory
+- * mapped. Unfortunately this is done currently before the nodes are
+- * discovered.
++ *
++ * Later we should allocate these tables in the local node of the
++ * memory mapped. Unfortunately this is done currently before the
++ * nodes are discovered.
+ */
+ if (!after_bootmem)
+ find_early_table_space(end);
+@@ -786,8 +788,8 @@ void __init_refok init_memory_mapping(un
+ end = (unsigned long)__va(end);
+
+ for (; start < end; start = next) {
+- unsigned long pud_phys;
+ pgd_t *pgd = pgd_offset_k(start);
++ unsigned long pud_phys;
+ pud_t *pud;
+
+ if (after_bootmem)
+@@ -795,8 +797,8 @@ void __init_refok init_memory_mapping(un
+ else
+ pud = alloc_static_page(&pud_phys);
+ next = start + PGDIR_SIZE;
+- if (next > end)
+- next = end;
++ if (next > end)
++ next = end;
+ phys_pud_init(pud, __pa(start), __pa(next));
+ if (!after_bootmem) {
+ early_make_page_readonly(pud, XENFEAT_writable_page_tables);
+@@ -810,12 +812,17 @@ void __init_refok init_memory_mapping(un
+ }
+
+ __flush_tlb_all();
++
++ if (!after_bootmem)
++ reserve_early(table_start << PAGE_SHIFT,
++ table_end << PAGE_SHIFT, "PGTABLE");
+ }
+
+ #ifndef CONFIG_NUMA
+ void __init paging_init(void)
+ {
+ unsigned long max_zone_pfns[MAX_NR_ZONES];
++
+ memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+ max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
+ max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
+@@ -829,40 +836,6 @@ void __init paging_init(void)
+ }
+ #endif
+
+-/* Unmap a kernel mapping if it exists. This is useful to avoid prefetches
+- from the CPU leading to inconsistent cache lines. address and size
+- must be aligned to 2MB boundaries.
+- Does nothing when the mapping doesn't exist. */
+-void __init clear_kernel_mapping(unsigned long address, unsigned long size)
+-{
+- unsigned long end = address + size;
+-
+- BUG_ON(address & ~LARGE_PAGE_MASK);
+- BUG_ON(size & ~LARGE_PAGE_MASK);
+-
+- for (; address < end; address += LARGE_PAGE_SIZE) {
+- pgd_t *pgd = pgd_offset_k(address);
+- pud_t *pud;
+- pmd_t *pmd;
+- if (pgd_none(*pgd))
+- continue;
+- pud = pud_offset(pgd, address);
+- if (pud_none(*pud))
+- continue;
+- pmd = pmd_offset(pud, address);
+- if (!pmd || pmd_none(*pmd))
+- continue;
+- if (0 == (__pmd_val(*pmd) & _PAGE_PSE)) {
+- /* Could handle this, but it should not happen currently. */
+- printk(KERN_ERR
+- "clear_kernel_mapping: mapping has been split. will leak memory\n");
+- pmd_ERROR(*pmd);
+- }
+- set_pmd(pmd, __pmd(0));
+- }
+- __flush_tlb_all();
+-}
+-
+ /*
+ * Memory hotplug specific functions
+ */
+@@ -888,16 +861,12 @@ int arch_add_memory(int nid, u64 start,
+ unsigned long nr_pages = size >> PAGE_SHIFT;
+ int ret;
+
+- init_memory_mapping(start, (start + size -1));
++ init_memory_mapping(start, start + size-1);
+
+ ret = __add_pages(zone, start_pfn, nr_pages);
+- if (ret)
+- goto error;
++ WARN_ON(1);
+
+ return ret;
+-error:
+- printk("%s: Problem encountered in __add_pages!\n", __func__);
+- return ret;
+ }
+ EXPORT_SYMBOL_GPL(arch_add_memory);
+
+@@ -911,36 +880,8 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to
+
+ #endif /* CONFIG_MEMORY_HOTPLUG */
+
+-#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE
+-/*
+- * Memory Hotadd without sparsemem. The mem_maps have been allocated in advance,
+- * just online the pages.
+- */
+-int __add_pages(struct zone *z, unsigned long start_pfn, unsigned long nr_pages)
+-{
+- int err = -EIO;
+- unsigned long pfn;
+- unsigned long total = 0, mem = 0;
+- for (pfn = start_pfn; pfn < start_pfn + nr_pages; pfn++) {
+- if (pfn_valid(pfn)) {
+- online_page(pfn_to_page(pfn));
+- err = 0;
+- mem++;
+- }
+- total++;
+- }
+- if (!err) {
+- z->spanned_pages += total;
+- z->present_pages += mem;
+- z->zone_pgdat->node_spanned_pages += total;
+- z->zone_pgdat->node_present_pages += mem;
+- }
+- return err;
+-}
+-#endif
+-
+-static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, kcore_modules,
+- kcore_vsyscall;
++static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel,
++ kcore_modules, kcore_vsyscall;
+
+ void __init mem_init(void)
+ {
+@@ -949,8 +890,7 @@ void __init mem_init(void)
+
+ pci_iommu_alloc();
+
+- /* clear the zero-page */
+- memset(empty_zero_page, 0, PAGE_SIZE);
++ /* clear_bss() already clear the empty_zero_page */
+
+ reservedpages = 0;
+
+@@ -968,7 +908,6 @@ void __init mem_init(void)
+ }
+ reservedpages = end_pfn - totalram_pages -
+ absent_pages_in_range(0, end_pfn);
+-
+ after_bootmem = 1;
+
+ codesize = (unsigned long) &_etext - (unsigned long) &_text;
+@@ -976,46 +915,64 @@ void __init mem_init(void)
+ initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
+
+ /* Register memory areas for /proc/kcore */
+- kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
+- kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
++ kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
++ kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
+ VMALLOC_END-VMALLOC_START);
+ kclist_add(&kcore_kernel, &_stext, _end - _stext);
+ kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN);
+- kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START,
++ kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START,
+ VSYSCALL_END - VSYSCALL_START);
+
+- printk("Memory: %luk/%luk available (%ldk kernel code, %ldk reserved, %ldk data, %ldk init)\n",
++ printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
++ "%ldk reserved, %ldk data, %ldk init)\n",
+ (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
+ end_pfn << (PAGE_SHIFT-10),
+ codesize >> 10,
+ reservedpages << (PAGE_SHIFT-10),
+ datasize >> 10,
+ initsize >> 10);
++
++ cpa_init();
+ }
+
+ void free_init_pages(char *what, unsigned long begin, unsigned long end)
+ {
+- unsigned long addr;
++ unsigned long addr = begin;
+
+- if (begin >= end)
++ if (addr >= end)
+ return;
+
++ /*
++ * If debugging page accesses then do not free this memory but
++ * mark them not present - any buggy init-section access will
++ * create a kernel page fault:
++ */
++#ifdef CONFIG_DEBUG_PAGEALLOC
++ printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n",
++ begin, PAGE_ALIGN(end));
++ set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
++#else
+ printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
+- for (addr = begin; addr < end; addr += PAGE_SIZE) {
++
++ for (; addr < end; addr += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(addr));
+ init_page_count(virt_to_page(addr));
+ memset((void *)(addr & ~(PAGE_SIZE-1)),
+ POISON_FREE_INITMEM, PAGE_SIZE);
+ if (addr >= __START_KERNEL_map) {
+ /* make_readonly() reports all kernel addresses. */
+- __make_page_writable(__va(__pa(addr)));
+- change_page_attr_addr(addr, 1, __pgprot(0));
++ if (HYPERVISOR_update_va_mapping((unsigned long)__va(__pa(addr)),
++ pfn_pte(__pa(addr) >> PAGE_SHIFT,
++ PAGE_KERNEL),
++ 0))
++ BUG();
++ if (HYPERVISOR_update_va_mapping(addr, __pte(0), 0))
++ BUG();
+ }
+ free_page(addr);
+ totalram_pages++;
+ }
+- if (addr > __START_KERNEL_map)
+- global_flush_tlb();
++#endif
+ }
+
+ void free_initmem(void)
+@@ -1026,6 +983,8 @@ void free_initmem(void)
+ }
+
+ #ifdef CONFIG_DEBUG_RODATA
++const int rodata_test_data = 0xC3;
++EXPORT_SYMBOL_GPL(rodata_test_data);
+
+ void mark_rodata_ro(void)
+ {
+@@ -1047,18 +1006,27 @@ void mark_rodata_ro(void)
+ if (end <= start)
+ return;
+
+- change_page_attr_addr(start, (end - start) >> PAGE_SHIFT, PAGE_KERNEL_RO);
+
+ printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
+ (end - start) >> 10);
++ set_memory_ro(start, (end - start) >> PAGE_SHIFT);
+
+ /*
+- * change_page_attr_addr() requires a global_flush_tlb() call after it.
+- * We do this after the printk so that if something went wrong in the
+- * change, the printk gets out at least to give a better debug hint
+- * of who is the culprit.
++ * The rodata section (but not the kernel text!) should also be
++ * not-executable.
+ */
+- global_flush_tlb();
++ start = ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK;
++ set_memory_nx(start, (end - start) >> PAGE_SHIFT);
++
++ rodata_test();
++
++#ifdef CONFIG_CPA_DEBUG
++ printk(KERN_INFO "Testing CPA: undo %lx-%lx\n", start, end);
++ set_memory_rw(start, (end-start) >> PAGE_SHIFT);
++
++ printk(KERN_INFO "Testing CPA: again\n");
++ set_memory_ro(start, (end-start) >> PAGE_SHIFT);
++#endif
+ }
+ #endif
+
+@@ -1069,17 +1037,21 @@ void free_initrd_mem(unsigned long start
+ }
+ #endif
+
+-void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
+-{
++void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
++{
+ #ifdef CONFIG_NUMA
+ int nid = phys_to_nid(phys);
+ #endif
+ unsigned long pfn = phys >> PAGE_SHIFT;
++
+ if (pfn >= end_pfn) {
+- /* This can happen with kdump kernels when accessing firmware
+- tables. */
++ /*
++ * This can happen with kdump kernels when accessing
++ * firmware tables:
++ */
+ if (pfn < end_pfn_map)
+ return;
++
+ printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %u\n",
+ phys, len);
+ return;
+@@ -1087,9 +1059,9 @@ void __init reserve_bootmem_generic(unsi
+
+ /* Should check here against the e820 map to avoid double free */
+ #ifdef CONFIG_NUMA
+- reserve_bootmem_node(NODE_DATA(nid), phys, len);
+-#else
+- reserve_bootmem(phys, len);
++ reserve_bootmem_node(NODE_DATA(nid), phys, len, BOOTMEM_DEFAULT);
++#else
++ reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
+ #endif
+ #ifndef CONFIG_XEN
+ if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {
+@@ -1101,46 +1073,49 @@ void __init reserve_bootmem_generic(unsi
+ #endif
+ }
+
+-int kern_addr_valid(unsigned long addr)
+-{
++int kern_addr_valid(unsigned long addr)
++{
+ unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT;
+- pgd_t *pgd;
+- pud_t *pud;
+- pmd_t *pmd;
+- pte_t *pte;
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
+
+ if (above != 0 && above != -1UL)
+- return 0;
+-
++ return 0;
++
+ pgd = pgd_offset_k(addr);
+ if (pgd_none(*pgd))
+ return 0;
+
+ pud = pud_offset(pgd, addr);
+ if (pud_none(*pud))
+- return 0;
++ return 0;
+
+ pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd))
+ return 0;
++
+ if (pmd_large(*pmd))
+ return pfn_valid(pmd_pfn(*pmd));
+
+ pte = pte_offset_kernel(pmd, addr);
+ if (pte_none(*pte))
+ return 0;
++
+ return pfn_valid(pte_pfn(*pte));
+ }
+
+-/* A pseudo VMA to allow ptrace access for the vsyscall page. This only
+- covers the 64bit vsyscall page now. 32bit has a real VMA now and does
+- not need special handling anymore. */
+-
++/*
++ * A pseudo VMA to allow ptrace access for the vsyscall page. This only
++ * covers the 64bit vsyscall page now. 32bit has a real VMA now and does
++ * not need special handling anymore:
++ */
+ static struct vm_area_struct gate_vma = {
+- .vm_start = VSYSCALL_START,
+- .vm_end = VSYSCALL_START + (VSYSCALL_MAPPED_PAGES << PAGE_SHIFT),
+- .vm_page_prot = PAGE_READONLY_EXEC,
+- .vm_flags = VM_READ | VM_EXEC
++ .vm_start = VSYSCALL_START,
++ .vm_end = VSYSCALL_START + (VSYSCALL_MAPPED_PAGES * PAGE_SIZE),
++ .vm_page_prot = PAGE_READONLY_EXEC,
++ .vm_flags = VM_READ | VM_EXEC
+ };
+
+ struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
+@@ -1155,14 +1130,17 @@ struct vm_area_struct *get_gate_vma(stru
+ int in_gate_area(struct task_struct *task, unsigned long addr)
+ {
+ struct vm_area_struct *vma = get_gate_vma(task);
++
+ if (!vma)
+ return 0;
++
+ return (addr >= vma->vm_start) && (addr < vma->vm_end);
+ }
+
+-/* Use this when you have no reliable task/vma, typically from interrupt
+- * context. It is less reliable than using the task's vma and may give
+- * false positives.
++/*
++ * Use this when you have no reliable task/vma, typically from interrupt
++ * context. It is less reliable than using the task's vma and may give
++ * false positives:
+ */
+ int in_gate_area_no_task(unsigned long addr)
+ {
+@@ -1182,8 +1160,8 @@ const char *arch_vma_name(struct vm_area
+ /*
+ * Initialise the sparsemem vmemmap using huge-pages at the PMD level.
+ */
+-int __meminit vmemmap_populate(struct page *start_page,
+- unsigned long size, int node)
++int __meminit
++vmemmap_populate(struct page *start_page, unsigned long size, int node)
+ {
+ unsigned long addr = (unsigned long)start_page;
+ unsigned long end = (unsigned long)(start_page + size);
+@@ -1198,6 +1176,7 @@ int __meminit vmemmap_populate(struct pa
+ pgd = vmemmap_pgd_populate(addr, node);
+ if (!pgd)
+ return -ENOMEM;
++
+ pud = vmemmap_pud_populate(pgd, addr, node);
+ if (!pud)
+ return -ENOMEM;
+@@ -1205,20 +1184,22 @@ int __meminit vmemmap_populate(struct pa
+ pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd)) {
+ pte_t entry;
+- void *p = vmemmap_alloc_block(PMD_SIZE, node);
++ void *p;
++
++ p = vmemmap_alloc_block(PMD_SIZE, node);
+ if (!p)
+ return -ENOMEM;
+
+- entry = pfn_pte(__pa(p) >> PAGE_SHIFT, PAGE_KERNEL);
+- mk_pte_huge(entry);
+- set_pmd(pmd, __pmd(pte_val(entry)));
++ entry = pfn_pte(__pa(p) >> PAGE_SHIFT,
++ PAGE_KERNEL_LARGE);
++ set_pmd(pmd, __pmd_ma(__pte_val(entry)));
+
+ printk(KERN_DEBUG " [%lx-%lx] PMD ->%p on node %d\n",
+ addr, addr + PMD_SIZE - 1, p, node);
+- } else
++ } else {
+ vmemmap_verify((pte_t *)pmd, node, addr, next);
++ }
+ }
+-
+ return 0;
+ }
+ #endif
+--- a/arch/x86/mm/ioremap_32-xen.c
++++ /dev/null
+@@ -1,445 +0,0 @@
+-/*
+- * arch/i386/mm/ioremap.c
+- *
+- * Re-map IO memory to kernel address space so that we can access it.
+- * This is needed for high PCI addresses that aren't mapped in the
+- * 640k-1MB IO memory area on PC's
+- *
+- * (C) Copyright 1995 1996 Linus Torvalds
+- */
+-
+-#include <linux/vmalloc.h>
+-#include <linux/init.h>
+-#include <linux/slab.h>
+-#include <linux/module.h>
+-#include <linux/io.h>
+-#include <linux/sched.h>
+-#include <asm/fixmap.h>
+-#include <asm/cacheflush.h>
+-#include <asm/tlbflush.h>
+-#include <asm/pgtable.h>
+-#include <asm/pgalloc.h>
+-
+-#define ISA_START_ADDRESS 0x0
+-#define ISA_END_ADDRESS 0x100000
+-
+-static int direct_remap_area_pte_fn(pte_t *pte,
+- struct page *pmd_page,
+- unsigned long address,
+- void *data)
+-{
+- mmu_update_t **v = (mmu_update_t **)data;
+-
+- BUG_ON(!pte_none(*pte));
+-
+- (*v)->ptr = ((u64)pfn_to_mfn(page_to_pfn(pmd_page)) <<
+- PAGE_SHIFT) | ((unsigned long)pte & ~PAGE_MASK);
+- (*v)++;
+-
+- return 0;
+-}
+-
+-static int __direct_remap_pfn_range(struct mm_struct *mm,
+- unsigned long address,
+- unsigned long mfn,
+- unsigned long size,
+- pgprot_t prot,
+- domid_t domid)
+-{
+- int rc;
+- unsigned long i, start_address;
+- mmu_update_t *u, *v, *w;
+-
+- u = v = w = (mmu_update_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
+- if (u == NULL)
+- return -ENOMEM;
+-
+- start_address = address;
+-
+- flush_cache_all();
+-
+- for (i = 0; i < size; i += PAGE_SIZE) {
+- if ((v - u) == (PAGE_SIZE / sizeof(mmu_update_t))) {
+- /* Flush a full batch after filling in the PTE ptrs. */
+- rc = apply_to_page_range(mm, start_address,
+- address - start_address,
+- direct_remap_area_pte_fn, &w);
+- if (rc)
+- goto out;
+- rc = -EFAULT;
+- if (HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0)
+- goto out;
+- v = w = u;
+- start_address = address;
+- }
+-
+- /*
+- * Fill in the machine address: PTE ptr is done later by
+- * apply_to_page_range().
+- */
+- v->val = __pte_val(pfn_pte_ma(mfn, prot)) | _PAGE_IO;
+-
+- mfn++;
+- address += PAGE_SIZE;
+- v++;
+- }
+-
+- if (v != u) {
+- /* Final batch. */
+- rc = apply_to_page_range(mm, start_address,
+- address - start_address,
+- direct_remap_area_pte_fn, &w);
+- if (rc)
+- goto out;
+- rc = -EFAULT;
+- if (unlikely(HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0))
+- goto out;
+- }
+-
+- rc = 0;
+-
+- out:
+- flush_tlb_all();
+-
+- free_page((unsigned long)u);
+-
+- return rc;
+-}
+-
+-int direct_remap_pfn_range(struct vm_area_struct *vma,
+- unsigned long address,
+- unsigned long mfn,
+- unsigned long size,
+- pgprot_t prot,
+- domid_t domid)
+-{
+- if (xen_feature(XENFEAT_auto_translated_physmap))
+- return remap_pfn_range(vma, address, mfn, size, prot);
+-
+- if (domid == DOMID_SELF)
+- return -EINVAL;
+-
+- vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
+-
+- vma->vm_mm->context.has_foreign_mappings = 1;
+-
+- return __direct_remap_pfn_range(
+- vma->vm_mm, address, mfn, size, prot, domid);
+-}
+-EXPORT_SYMBOL(direct_remap_pfn_range);
+-
+-int direct_kernel_remap_pfn_range(unsigned long address,
+- unsigned long mfn,
+- unsigned long size,
+- pgprot_t prot,
+- domid_t domid)
+-{
+- return __direct_remap_pfn_range(
+- &init_mm, address, mfn, size, prot, domid);
+-}
+-EXPORT_SYMBOL(direct_kernel_remap_pfn_range);
+-
+-static int lookup_pte_fn(
+- pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
+-{
+- uint64_t *ptep = (uint64_t *)data;
+- if (ptep)
+- *ptep = ((uint64_t)pfn_to_mfn(page_to_pfn(pmd_page)) <<
+- PAGE_SHIFT) | ((unsigned long)pte & ~PAGE_MASK);
+- return 0;
+-}
+-
+-int create_lookup_pte_addr(struct mm_struct *mm,
+- unsigned long address,
+- uint64_t *ptep)
+-{
+- return apply_to_page_range(mm, address, PAGE_SIZE,
+- lookup_pte_fn, ptep);
+-}
+-
+-EXPORT_SYMBOL(create_lookup_pte_addr);
+-
+-static int noop_fn(
+- pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
+-{
+- return 0;
+-}
+-
+-int touch_pte_range(struct mm_struct *mm,
+- unsigned long address,
+- unsigned long size)
+-{
+- return apply_to_page_range(mm, address, size, noop_fn, NULL);
+-}
+-
+-EXPORT_SYMBOL(touch_pte_range);
+-
+-/*
+- * Does @address reside within a non-highmem page that is local to this virtual
+- * machine (i.e., not an I/O page, nor a memory page belonging to another VM).
+- * See the comment that accompanies mfn_to_local_pfn() in page.h to understand
+- * why this works.
+- */
+-static inline int is_local_lowmem(unsigned long address)
+-{
+- extern unsigned long max_low_pfn;
+- return (mfn_to_local_pfn(address >> PAGE_SHIFT) < max_low_pfn);
+-}
+-
+-/*
+- * Generic mapping function (not visible outside):
+- */
+-
+-/*
+- * Remap an arbitrary physical address space into the kernel virtual
+- * address space. Needed when the kernel wants to access high addresses
+- * directly.
+- *
+- * NOTE! We need to allow non-page-aligned mappings too: we will obviously
+- * have to convert them into an offset in a page-aligned mapping, but the
+- * caller shouldn't need to know that small detail.
+- */
+-void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
+-{
+- void __iomem * addr;
+- struct vm_struct * area;
+- unsigned long offset, last_addr;
+- pgprot_t prot;
+- domid_t domid = DOMID_IO;
+-
+- /* Don't allow wraparound or zero size */
+- last_addr = phys_addr + size - 1;
+- if (!size || last_addr < phys_addr)
+- return NULL;
+-
+- /*
+- * Don't remap the low PCI/ISA area, it's always mapped..
+- */
+- if (is_initial_xendomain() &&
+- phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS)
+- return (void __iomem *) isa_bus_to_virt(phys_addr);
+-
+- /*
+- * Don't allow anybody to remap normal RAM that we're using..
+- */
+- if (is_local_lowmem(phys_addr)) {
+- char *t_addr, *t_end;
+- struct page *page;
+-
+- t_addr = bus_to_virt(phys_addr);
+- t_end = t_addr + (size - 1);
+-
+- for(page = virt_to_page(t_addr); page <= virt_to_page(t_end); page++)
+- if(!PageReserved(page))
+- return NULL;
+-
+- domid = DOMID_SELF;
+- }
+-
+- prot = __pgprot(_KERNPG_TABLE | flags);
+-
+- /*
+- * Mappings have to be page-aligned
+- */
+- offset = phys_addr & ~PAGE_MASK;
+- phys_addr &= PAGE_MASK;
+- size = PAGE_ALIGN(last_addr+1) - phys_addr;
+-
+- /*
+- * Ok, go for it..
+- */
+- area = get_vm_area(size, VM_IOREMAP | (flags << 20));
+- if (!area)
+- return NULL;
+- area->phys_addr = phys_addr;
+- addr = (void __iomem *) area->addr;
+- if (__direct_remap_pfn_range(&init_mm, (unsigned long)addr,
+- phys_addr>>PAGE_SHIFT,
+- size, prot, domid)) {
+- vunmap((void __force *) addr);
+- return NULL;
+- }
+- return (void __iomem *) (offset + (char __iomem *)addr);
+-}
+-EXPORT_SYMBOL(__ioremap);
+-
+-/**
+- * ioremap_nocache - map bus memory into CPU space
+- * @offset: bus address of the memory
+- * @size: size of the resource to map
+- *
+- * ioremap_nocache performs a platform specific sequence of operations to
+- * make bus memory CPU accessible via the readb/readw/readl/writeb/
+- * writew/writel functions and the other mmio helpers. The returned
+- * address is not guaranteed to be usable directly as a virtual
+- * address.
+- *
+- * This version of ioremap ensures that the memory is marked uncachable
+- * on the CPU as well as honouring existing caching rules from things like
+- * the PCI bus. Note that there are other caches and buffers on many
+- * busses. In particular driver authors should read up on PCI writes
+- *
+- * It's useful if some control registers are in such an area and
+- * write combining or read caching is not desirable:
+- *
+- * Must be freed with iounmap.
+- */
+-
+-void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
+-{
+- unsigned long last_addr;
+- void __iomem *p = __ioremap(phys_addr, size, _PAGE_PCD);
+- if (!p)
+- return p;
+-
+- /* Guaranteed to be > phys_addr, as per __ioremap() */
+- last_addr = phys_addr + size - 1;
+-
+- if (is_local_lowmem(last_addr)) {
+- struct page *ppage = virt_to_page(bus_to_virt(phys_addr));
+- unsigned long npages;
+-
+- phys_addr &= PAGE_MASK;
+-
+- /* This might overflow and become zero.. */
+- last_addr = PAGE_ALIGN(last_addr);
+-
+- /* .. but that's ok, because modulo-2**n arithmetic will make
+- * the page-aligned "last - first" come out right.
+- */
+- npages = (last_addr - phys_addr) >> PAGE_SHIFT;
+-
+- if (change_page_attr(ppage, npages, PAGE_KERNEL_NOCACHE) < 0) {
+- iounmap(p);
+- p = NULL;
+- }
+- global_flush_tlb();
+- }
+-
+- return p;
+-}
+-EXPORT_SYMBOL(ioremap_nocache);
+-
+-/**
+- * iounmap - Free a IO remapping
+- * @addr: virtual address from ioremap_*
+- *
+- * Caller must ensure there is only one unmapping for the same pointer.
+- */
+-void iounmap(volatile void __iomem *addr)
+-{
+- struct vm_struct *p, *o;
+-
+- if ((void __force *)addr <= high_memory)
+- return;
+-
+- /*
+- * __ioremap special-cases the PCI/ISA range by not instantiating a
+- * vm_area and by simply returning an address into the kernel mapping
+- * of ISA space. So handle that here.
+- */
+- if ((unsigned long) addr >= fix_to_virt(FIX_ISAMAP_BEGIN))
+- return;
+-
+- addr = (volatile void __iomem *)(PAGE_MASK & (unsigned long __force)addr);
+-
+- /* Use the vm area unlocked, assuming the caller
+- ensures there isn't another iounmap for the same address
+- in parallel. Reuse of the virtual address is prevented by
+- leaving it in the global lists until we're done with it.
+- cpa takes care of the direct mappings. */
+- read_lock(&vmlist_lock);
+- for (p = vmlist; p; p = p->next) {
+- if (p->addr == addr)
+- break;
+- }
+- read_unlock(&vmlist_lock);
+-
+- if (!p) {
+- printk("iounmap: bad address %p\n", addr);
+- dump_stack();
+- return;
+- }
+-
+- /* Reset the direct mapping. Can block */
+- if ((p->flags >> 20) && is_local_lowmem(p->phys_addr)) {
+- change_page_attr(virt_to_page(bus_to_virt(p->phys_addr)),
+- get_vm_area_size(p) >> PAGE_SHIFT,
+- PAGE_KERNEL);
+- global_flush_tlb();
+- }
+-
+- /* Finally remove it */
+- o = remove_vm_area((void *)addr);
+- BUG_ON(p != o || o == NULL);
+- kfree(p);
+-}
+-EXPORT_SYMBOL(iounmap);
+-
+-void __init *bt_ioremap(unsigned long phys_addr, unsigned long size)
+-{
+- unsigned long offset, last_addr;
+- unsigned int nrpages;
+- enum fixed_addresses idx;
+-
+- /* Don't allow wraparound or zero size */
+- last_addr = phys_addr + size - 1;
+- if (!size || last_addr < phys_addr)
+- return NULL;
+-
+- /*
+- * Don't remap the low PCI/ISA area, it's always mapped..
+- */
+- if (is_initial_xendomain() &&
+- phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS)
+- return isa_bus_to_virt(phys_addr);
+-
+- /*
+- * Mappings have to be page-aligned
+- */
+- offset = phys_addr & ~PAGE_MASK;
+- phys_addr &= PAGE_MASK;
+- size = PAGE_ALIGN(last_addr) - phys_addr;
+-
+- /*
+- * Mappings have to fit in the FIX_BTMAP area.
+- */
+- nrpages = size >> PAGE_SHIFT;
+- if (nrpages > NR_FIX_BTMAPS)
+- return NULL;
+-
+- /*
+- * Ok, go for it..
+- */
+- idx = FIX_BTMAP_BEGIN;
+- while (nrpages > 0) {
+- set_fixmap(idx, phys_addr);
+- phys_addr += PAGE_SIZE;
+- --idx;
+- --nrpages;
+- }
+- return (void*) (offset + fix_to_virt(FIX_BTMAP_BEGIN));
+-}
+-
+-void __init bt_iounmap(void *addr, unsigned long size)
+-{
+- unsigned long virt_addr;
+- unsigned long offset;
+- unsigned int nrpages;
+- enum fixed_addresses idx;
+-
+- virt_addr = (unsigned long)addr;
+- if (virt_addr < fix_to_virt(FIX_BTMAP_BEGIN))
+- return;
+- if (virt_addr >= fix_to_virt(FIX_ISAMAP_BEGIN))
+- return;
+- offset = virt_addr & ~PAGE_MASK;
+- nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
+-
+- idx = FIX_BTMAP_BEGIN;
+- while (nrpages > 0) {
+- clear_fixmap(idx);
+- --idx;
+- --nrpages;
+- }
+-}
+--- /dev/null
++++ b/arch/x86/mm/ioremap-xen.c
+@@ -0,0 +1,685 @@
++/*
++ * Re-map IO memory to kernel address space so that we can access it.
++ * This is needed for high PCI addresses that aren't mapped in the
++ * 640k-1MB IO memory area on PC's
++ *
++ * (C) Copyright 1995 1996 Linus Torvalds
++ */
++
++#include <linux/bootmem.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/module.h>
++#include <linux/pfn.h>
++#include <linux/slab.h>
++#include <linux/vmalloc.h>
++
++#include <asm/cacheflush.h>
++#include <asm/e820.h>
++#include <asm/fixmap.h>
++#include <asm/pgtable.h>
++#include <asm/tlbflush.h>
++#include <asm/pgalloc.h>
++
++enum ioremap_mode {
++ IOR_MODE_UNCACHED,
++ IOR_MODE_CACHED,
++};
++
++#if defined(CONFIG_X86_64) && !defined(CONFIG_XEN)
++
++unsigned long __phys_addr(unsigned long x)
++{
++ if (x >= __START_KERNEL_map)
++ return x - __START_KERNEL_map + phys_base;
++ return x - PAGE_OFFSET;
++}
++EXPORT_SYMBOL(__phys_addr);
++
++#endif
++
++static int direct_remap_area_pte_fn(pte_t *pte,
++ struct page *pmd_page,
++ unsigned long address,
++ void *data)
++{
++ mmu_update_t **v = (mmu_update_t **)data;
++
++ BUG_ON(!pte_none(*pte));
++
++ (*v)->ptr = ((u64)pfn_to_mfn(page_to_pfn(pmd_page)) <<
++ PAGE_SHIFT) | ((unsigned long)pte & ~PAGE_MASK);
++ (*v)++;
++
++ return 0;
++}
++
++static int __direct_remap_pfn_range(struct mm_struct *mm,
++ unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid)
++{
++ int rc;
++ unsigned long i, start_address;
++ mmu_update_t *u, *v, *w;
++
++ u = v = w = (mmu_update_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
++ if (u == NULL)
++ return -ENOMEM;
++
++ start_address = address;
++
++ flush_cache_all();
++
++ for (i = 0; i < size; i += PAGE_SIZE) {
++ if ((v - u) == (PAGE_SIZE / sizeof(mmu_update_t))) {
++ /* Flush a full batch after filling in the PTE ptrs. */
++ rc = apply_to_page_range(mm, start_address,
++ address - start_address,
++ direct_remap_area_pte_fn, &w);
++ if (rc)
++ goto out;
++ rc = -EFAULT;
++ if (HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0)
++ goto out;
++ v = w = u;
++ start_address = address;
++ }
++
++ /*
++ * Fill in the machine address: PTE ptr is done later by
++ * apply_to_page_range().
++ */
++ v->val = __pte_val(pfn_pte_ma(mfn, prot)) | _PAGE_IO;
++
++ mfn++;
++ address += PAGE_SIZE;
++ v++;
++ }
++
++ if (v != u) {
++ /* Final batch. */
++ rc = apply_to_page_range(mm, start_address,
++ address - start_address,
++ direct_remap_area_pte_fn, &w);
++ if (rc)
++ goto out;
++ rc = -EFAULT;
++ if (unlikely(HYPERVISOR_mmu_update(u, v - u, NULL, domid) < 0))
++ goto out;
++ }
++
++ rc = 0;
++
++ out:
++ flush_tlb_all();
++
++ free_page((unsigned long)u);
++
++ return rc;
++}
++
++int direct_remap_pfn_range(struct vm_area_struct *vma,
++ unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid)
++{
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return remap_pfn_range(vma, address, mfn, size, prot);
++
++ if (domid == DOMID_SELF)
++ return -EINVAL;
++
++ vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
++
++ vma->vm_mm->context.has_foreign_mappings = 1;
++
++ return __direct_remap_pfn_range(
++ vma->vm_mm, address, mfn, size, prot, domid);
++}
++EXPORT_SYMBOL(direct_remap_pfn_range);
++
++int direct_kernel_remap_pfn_range(unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid)
++{
++ return __direct_remap_pfn_range(
++ &init_mm, address, mfn, size, prot, domid);
++}
++EXPORT_SYMBOL(direct_kernel_remap_pfn_range);
++
++static int lookup_pte_fn(
++ pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
++{
++ uint64_t *ptep = (uint64_t *)data;
++ if (ptep)
++ *ptep = ((uint64_t)pfn_to_mfn(page_to_pfn(pmd_page)) <<
++ PAGE_SHIFT) | ((unsigned long)pte & ~PAGE_MASK);
++ return 0;
++}
++
++int create_lookup_pte_addr(struct mm_struct *mm,
++ unsigned long address,
++ uint64_t *ptep)
++{
++ return apply_to_page_range(mm, address, PAGE_SIZE,
++ lookup_pte_fn, ptep);
++}
++
++EXPORT_SYMBOL(create_lookup_pte_addr);
++
++static int noop_fn(
++ pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
++{
++ return 0;
++}
++
++int touch_pte_range(struct mm_struct *mm,
++ unsigned long address,
++ unsigned long size)
++{
++ return apply_to_page_range(mm, address, size, noop_fn, NULL);
++}
++
++EXPORT_SYMBOL(touch_pte_range);
++
++#ifdef CONFIG_X86_32
++int page_is_ram(unsigned long pagenr)
++{
++ unsigned long addr, end;
++ int i;
++
++#ifndef CONFIG_XEN
++ /*
++ * A special case is the first 4Kb of memory;
++ * This is a BIOS owned area, not kernel ram, but generally
++ * not listed as such in the E820 table.
++ */
++ if (pagenr == 0)
++ return 0;
++
++ /*
++ * Second special case: Some BIOSen report the PC BIOS
++ * area (640->1Mb) as ram even though it is not.
++ */
++ if (pagenr >= (BIOS_BEGIN >> PAGE_SHIFT) &&
++ pagenr < (BIOS_END >> PAGE_SHIFT))
++ return 0;
++#endif
++
++ for (i = 0; i < e820.nr_map; i++) {
++ /*
++ * Not usable memory:
++ */
++ if (e820.map[i].type != E820_RAM)
++ continue;
++ addr = (e820.map[i].addr + PAGE_SIZE-1) >> PAGE_SHIFT;
++ end = (e820.map[i].addr + e820.map[i].size) >> PAGE_SHIFT;
++
++
++ if ((pagenr >= addr) && (pagenr < end))
++ return 1;
++ }
++ return 0;
++}
++#endif
++
++/*
++ * Fix up the linear direct mapping of the kernel to avoid cache attribute
++ * conflicts.
++ */
++static int ioremap_change_attr(unsigned long vaddr, unsigned long size,
++ enum ioremap_mode mode)
++{
++ unsigned long nrpages = size >> PAGE_SHIFT;
++ int err;
++
++ switch (mode) {
++ case IOR_MODE_UNCACHED:
++ default:
++ err = set_memory_uc(vaddr, nrpages);
++ break;
++ case IOR_MODE_CACHED:
++ err = set_memory_wb(vaddr, nrpages);
++ break;
++ }
++
++ return err;
++}
++
++/*
++ * Remap an arbitrary physical address space into the kernel virtual
++ * address space. Needed when the kernel wants to access high addresses
++ * directly.
++ *
++ * NOTE! We need to allow non-page-aligned mappings too: we will obviously
++ * have to convert them into an offset in a page-aligned mapping, but the
++ * caller shouldn't need to know that small detail.
++ */
++static void __iomem *__ioremap(resource_size_t phys_addr, unsigned long size,
++ enum ioremap_mode mode)
++{
++ unsigned long mfn, offset, last_addr, vaddr;
++ struct vm_struct *area;
++ pgprot_t prot;
++ domid_t domid = DOMID_IO;
++
++ /* Don't allow wraparound or zero size */
++ last_addr = phys_addr + size - 1;
++ if (!size || last_addr < phys_addr)
++ return NULL;
++
++ /*
++ * Don't remap the low PCI/ISA area, it's always mapped..
++ */
++ if (is_initial_xendomain() && last_addr < ISA_END_ADDRESS)
++ return (__force void __iomem *)isa_bus_to_virt((unsigned long)phys_addr);
++
++ /*
++ * Don't allow anybody to remap normal RAM that we're using..
++ */
++ for (mfn = PFN_DOWN(phys_addr); mfn < PFN_UP(last_addr); mfn++) {
++ unsigned long pfn = mfn_to_local_pfn(mfn);
++
++ if (pfn >= max_pfn)
++ continue;
++
++ domid = DOMID_SELF;
++
++ if (pfn >= max_pfn_mapped) /* bogus */
++ continue;
++
++ if (pfn_valid(pfn) && !PageReserved(pfn_to_page(pfn)))
++ return NULL;
++ }
++
++ switch (mode) {
++ case IOR_MODE_UNCACHED:
++ default:
++ /*
++ * FIXME: we will use UC MINUS for now, as video fb drivers
++ * depend on it. Upcoming ioremap_wc() will fix this behavior.
++ */
++ prot = PAGE_KERNEL_UC_MINUS;
++ break;
++ case IOR_MODE_CACHED:
++ prot = PAGE_KERNEL;
++ break;
++ }
++
++ /*
++ * Mappings have to be page-aligned
++ */
++ offset = phys_addr & ~PAGE_MASK;
++ phys_addr &= PAGE_MASK;
++ size = PAGE_ALIGN(last_addr+1) - phys_addr;
++
++ /*
++ * Ok, go for it..
++ */
++ area = get_vm_area(size, VM_IOREMAP | (mode << 20));
++ if (!area)
++ return NULL;
++ area->phys_addr = phys_addr;
++ vaddr = (unsigned long) area->addr;
++ if (__direct_remap_pfn_range(&init_mm, vaddr, PFN_DOWN(phys_addr),
++ size, prot, domid)) {
++ free_vm_area(area);
++ return NULL;
++ }
++
++ if (ioremap_change_attr(vaddr, size, mode) < 0) {
++ iounmap((void __iomem *) vaddr);
++ return NULL;
++ }
++
++ return (void __iomem *) (vaddr + offset);
++}
++
++/**
++ * ioremap_nocache - map bus memory into CPU space
++ * @offset: bus address of the memory
++ * @size: size of the resource to map
++ *
++ * ioremap_nocache performs a platform specific sequence of operations to
++ * make bus memory CPU accessible via the readb/readw/readl/writeb/
++ * writew/writel functions and the other mmio helpers. The returned
++ * address is not guaranteed to be usable directly as a virtual
++ * address.
++ *
++ * This version of ioremap ensures that the memory is marked uncachable
++ * on the CPU as well as honouring existing caching rules from things like
++ * the PCI bus. Note that there are other caches and buffers on many
++ * busses. In particular driver authors should read up on PCI writes
++ *
++ * It's useful if some control registers are in such an area and
++ * write combining or read caching is not desirable:
++ *
++ * Must be freed with iounmap.
++ */
++void __iomem *ioremap_nocache(resource_size_t phys_addr, unsigned long size)
++{
++ return __ioremap(phys_addr, size, IOR_MODE_UNCACHED);
++}
++EXPORT_SYMBOL(ioremap_nocache);
++
++void __iomem *ioremap_cache(resource_size_t phys_addr, unsigned long size)
++{
++ return __ioremap(phys_addr, size, IOR_MODE_CACHED);
++}
++EXPORT_SYMBOL(ioremap_cache);
++
++/**
++ * iounmap - Free a IO remapping
++ * @addr: virtual address from ioremap_*
++ *
++ * Caller must ensure there is only one unmapping for the same pointer.
++ */
++void iounmap(volatile void __iomem *addr)
++{
++ struct vm_struct *p, *o;
++
++ if ((void __force *)addr <= high_memory)
++ return;
++
++ /*
++ * __ioremap special-cases the PCI/ISA range by not instantiating a
++ * vm_area and by simply returning an address into the kernel mapping
++ * of ISA space. So handle that here.
++ */
++ if ((unsigned long)addr >= fix_to_virt(FIX_ISAMAP_BEGIN))
++ return;
++
++ addr = (volatile void __iomem *)
++ (PAGE_MASK & (unsigned long __force)addr);
++
++ /* Use the vm area unlocked, assuming the caller
++ ensures there isn't another iounmap for the same address
++ in parallel. Reuse of the virtual address is prevented by
++ leaving it in the global lists until we're done with it.
++ cpa takes care of the direct mappings. */
++ read_lock(&vmlist_lock);
++ for (p = vmlist; p; p = p->next) {
++ if (p->addr == addr)
++ break;
++ }
++ read_unlock(&vmlist_lock);
++
++ if (!p) {
++ printk(KERN_ERR "iounmap: bad address %p\n", addr);
++ dump_stack();
++ return;
++ }
++
++ if ((p->flags >> 20) != IOR_MODE_CACHED) {
++ unsigned long n = get_vm_area_size(p) >> PAGE_SHIFT;
++ unsigned long mfn = p->phys_addr;
++ unsigned long va = (unsigned long)addr;
++
++ for (; n > 0; n--, mfn++, va += PAGE_SIZE)
++ if (mfn_to_local_pfn(mfn) < max_pfn)
++ set_memory_wb(va, 1);
++ }
++
++ /* Finally remove it */
++ o = remove_vm_area((void *)addr);
++ BUG_ON(p != o || o == NULL);
++ kfree(p);
++}
++EXPORT_SYMBOL(iounmap);
++
++int __initdata early_ioremap_debug;
++
++static int __init early_ioremap_debug_setup(char *str)
++{
++ early_ioremap_debug = 1;
++
++ return 0;
++}
++early_param("early_ioremap_debug", early_ioremap_debug_setup);
++
++static __initdata int after_paging_init;
++static __initdata pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)]
++ __attribute__((aligned(PAGE_SIZE)));
++
++#ifdef CONFIG_X86_32
++static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
++{
++ /* Don't assume we're using swapper_pg_dir at this point */
++ pgd_t *base = __va(read_cr3());
++ pgd_t *pgd = &base[pgd_index(addr)];
++ pud_t *pud = pud_offset(pgd, addr);
++ pmd_t *pmd = pmd_offset(pud, addr);
++
++ return pmd;
++}
++#else
++#define early_ioremap_pmd early_get_pmd
++#define make_lowmem_page_readonly early_make_page_readonly
++#define make_lowmem_page_writable make_page_writable
++#endif
++
++static inline pte_t * __init early_ioremap_pte(unsigned long addr)
++{
++ return &bm_pte[pte_index(addr)];
++}
++
++void __init early_ioremap_init(void)
++{
++ pmd_t *pmd;
++
++ if (early_ioremap_debug)
++ printk(KERN_INFO "early_ioremap_init()\n");
++
++ pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
++ memset(bm_pte, 0, sizeof(bm_pte));
++ make_lowmem_page_readonly(bm_pte, XENFEAT_writable_page_tables);
++ pmd_populate_kernel(&init_mm, pmd, bm_pte);
++
++ /*
++ * The boot-ioremap range spans multiple pmds, for which
++ * we are not prepared:
++ */
++ if (pmd != early_ioremap_pmd(fix_to_virt(FIX_BTMAP_END))) {
++ WARN_ON(1);
++ printk(KERN_WARNING "pmd %p != %p\n",
++ pmd, early_ioremap_pmd(fix_to_virt(FIX_BTMAP_END)));
++ printk(KERN_WARNING "fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
++ fix_to_virt(FIX_BTMAP_BEGIN));
++ printk(KERN_WARNING "fix_to_virt(FIX_BTMAP_END): %08lx\n",
++ fix_to_virt(FIX_BTMAP_END));
++
++ printk(KERN_WARNING "FIX_BTMAP_END: %d\n", FIX_BTMAP_END);
++ printk(KERN_WARNING "FIX_BTMAP_BEGIN: %d\n",
++ FIX_BTMAP_BEGIN);
++ }
++}
++
++void __init early_ioremap_clear(void)
++{
++ pmd_t *pmd;
++
++ if (early_ioremap_debug)
++ printk(KERN_INFO "early_ioremap_clear()\n");
++
++ pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
++ pmd_clear(pmd);
++ make_lowmem_page_writable(bm_pte, XENFEAT_writable_page_tables);
++ /* paravirt_release_pt(__pa(bm_pte) >> PAGE_SHIFT); */
++ __flush_tlb_all();
++}
++
++void __init early_ioremap_reset(void)
++{
++ enum fixed_addresses idx;
++ unsigned long addr, phys;
++ pte_t *pte;
++
++ after_paging_init = 1;
++ for (idx = FIX_BTMAP_BEGIN; idx >= FIX_BTMAP_END; idx--) {
++ addr = fix_to_virt(idx);
++ pte = early_ioremap_pte(addr);
++ if (pte_present(*pte)) {
++ phys = __pte_val(*pte) & PAGE_MASK;
++ set_fixmap(idx, phys);
++ }
++ }
++}
++
++static void __init __early_set_fixmap(enum fixed_addresses idx,
++ unsigned long phys, pgprot_t flags)
++{
++ unsigned long addr = __fix_to_virt(idx);
++ pte_t *pte;
++
++ if (idx >= __end_of_fixed_addresses) {
++ BUG();
++ return;
++ }
++ pte = early_ioremap_pte(addr);
++ if (pgprot_val(flags))
++ set_pte(pte, pfn_pte_ma(phys >> PAGE_SHIFT, flags));
++ else
++ pte_clear(NULL, addr, pte);
++ __flush_tlb_one(addr);
++}
++
++static inline void __init early_set_fixmap(enum fixed_addresses idx,
++ unsigned long phys)
++{
++ if (after_paging_init)
++ set_fixmap(idx, phys);
++ else
++ __early_set_fixmap(idx, phys, PAGE_KERNEL);
++}
++
++static inline void __init early_clear_fixmap(enum fixed_addresses idx)
++{
++ if (after_paging_init)
++ clear_fixmap(idx);
++ else
++ __early_set_fixmap(idx, 0, __pgprot(0));
++}
++
++
++int __initdata early_ioremap_nested;
++
++static int __init check_early_ioremap_leak(void)
++{
++ if (!early_ioremap_nested)
++ return 0;
++
++ printk(KERN_WARNING
++ "Debug warning: early ioremap leak of %d areas detected.\n",
++ early_ioremap_nested);
++ printk(KERN_WARNING
++ "please boot with early_ioremap_debug and report the dmesg.\n");
++ WARN_ON(1);
++
++ return 1;
++}
++late_initcall(check_early_ioremap_leak);
++
++void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
++{
++ unsigned long offset, last_addr;
++ unsigned int nrpages, nesting;
++ enum fixed_addresses idx0, idx;
++
++ WARN_ON(system_state != SYSTEM_BOOTING);
++
++ nesting = early_ioremap_nested;
++ if (early_ioremap_debug) {
++ printk(KERN_INFO "early_ioremap(%08lx, %08lx) [%d] => ",
++ phys_addr, size, nesting);
++ dump_stack();
++ }
++
++ /* Don't allow wraparound or zero size */
++ last_addr = phys_addr + size - 1;
++ if (!size || last_addr < phys_addr) {
++ WARN_ON(1);
++ return NULL;
++ }
++
++ if (nesting >= FIX_BTMAPS_NESTING) {
++ WARN_ON(1);
++ return NULL;
++ }
++ early_ioremap_nested++;
++ /*
++ * Mappings have to be page-aligned
++ */
++ offset = phys_addr & ~PAGE_MASK;
++ phys_addr &= PAGE_MASK;
++ size = PAGE_ALIGN(last_addr) - phys_addr;
++
++ /*
++ * Mappings have to fit in the FIX_BTMAP area.
++ */
++ nrpages = size >> PAGE_SHIFT;
++ if (nrpages > NR_FIX_BTMAPS) {
++ WARN_ON(1);
++ return NULL;
++ }
++
++ /*
++ * Ok, go for it..
++ */
++ idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
++ idx = idx0;
++ while (nrpages > 0) {
++ early_set_fixmap(idx, phys_addr);
++ phys_addr += PAGE_SIZE;
++ --idx;
++ --nrpages;
++ }
++ if (early_ioremap_debug)
++ printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
++
++ return (void *) (offset + fix_to_virt(idx0));
++}
++
++void __init early_iounmap(void *addr, unsigned long size)
++{
++ unsigned long virt_addr;
++ unsigned long offset;
++ unsigned int nrpages;
++ enum fixed_addresses idx;
++ unsigned int nesting;
++
++ nesting = --early_ioremap_nested;
++ WARN_ON(nesting < 0);
++
++ if (early_ioremap_debug) {
++ printk(KERN_INFO "early_iounmap(%p, %08lx) [%d]\n", addr,
++ size, nesting);
++ dump_stack();
++ }
++
++ virt_addr = (unsigned long)addr;
++ if (virt_addr < fix_to_virt(FIX_BTMAP_BEGIN)) {
++ WARN_ON(1);
++ return;
++ }
++ offset = virt_addr & ~PAGE_MASK;
++ nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
++
++ idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
++ while (nrpages > 0) {
++ early_clear_fixmap(idx);
++ --idx;
++ --nrpages;
++ }
++}
++
++void __this_fixmap_does_not_exist(void)
++{
++ WARN_ON(1);
++}
+--- a/arch/x86/mm/pageattr_64-xen.c
++++ /dev/null
+@@ -1,542 +0,0 @@
+-/*
+- * Copyright 2002 Andi Kleen, SuSE Labs.
+- * Thanks to Ben LaHaise for precious feedback.
+- */
+-
+-#include <linux/mm.h>
+-#include <linux/sched.h>
+-#include <linux/highmem.h>
+-#include <linux/module.h>
+-#include <linux/slab.h>
+-#include <asm/uaccess.h>
+-#include <asm/processor.h>
+-#include <asm/tlbflush.h>
+-#include <asm/io.h>
+-
+-#ifdef CONFIG_XEN
+-#include <asm/pgalloc.h>
+-#include <asm/mmu_context.h>
+-
+-static void _pin_lock(struct mm_struct *mm, int lock) {
+- if (lock)
+- spin_lock(&mm->page_table_lock);
+-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+- /* While mm->page_table_lock protects us against insertions and
+- * removals of higher level page table pages, it doesn't protect
+- * against updates of pte-s. Such updates, however, require the
+- * pte pages to be in consistent state (unpinned+writable or
+- * pinned+readonly). The pinning and attribute changes, however
+- * cannot be done atomically, which is why such updates must be
+- * prevented from happening concurrently.
+- * Note that no pte lock can ever elsewhere be acquired nesting
+- * with an already acquired one in the same mm, or with the mm's
+- * page_table_lock already acquired, as that would break in the
+- * non-split case (where all these are actually resolving to the
+- * one page_table_lock). Thus acquiring all of them here is not
+- * going to result in dead locks, and the order of acquires
+- * doesn't matter.
+- */
+- {
+- pgd_t *pgd = mm->pgd;
+- unsigned g;
+-
+- for (g = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
+- pud_t *pud;
+- unsigned u;
+-
+- if (pgd_none(*pgd))
+- continue;
+- pud = pud_offset(pgd, 0);
+- for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
+- pmd_t *pmd;
+- unsigned m;
+-
+- if (pud_none(*pud))
+- continue;
+- pmd = pmd_offset(pud, 0);
+- for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
+- spinlock_t *ptl;
+-
+- if (pmd_none(*pmd))
+- continue;
+- ptl = pte_lockptr(0, pmd);
+- if (lock)
+- spin_lock(ptl);
+- else
+- spin_unlock(ptl);
+- }
+- }
+- }
+- }
+-#endif
+- if (!lock)
+- spin_unlock(&mm->page_table_lock);
+-}
+-#define pin_lock(mm) _pin_lock(mm, 1)
+-#define pin_unlock(mm) _pin_lock(mm, 0)
+-
+-#define PIN_BATCH 8
+-static DEFINE_PER_CPU(multicall_entry_t[PIN_BATCH], pb_mcl);
+-
+-static inline unsigned int pgd_walk_set_prot(void *pt, pgprot_t flags,
+- unsigned int cpu, unsigned int seq)
+-{
+- struct page *page = virt_to_page(pt);
+- unsigned long pfn = page_to_pfn(page);
+-
+- MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
+- (unsigned long)__va(pfn << PAGE_SHIFT),
+- pfn_pte(pfn, flags), 0);
+- if (unlikely(++seq == PIN_BATCH)) {
+- if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
+- PIN_BATCH, NULL)))
+- BUG();
+- seq = 0;
+- }
+-
+- return seq;
+-}
+-
+-static void pgd_walk(pgd_t *pgd_base, pgprot_t flags)
+-{
+- pgd_t *pgd = pgd_base;
+- pud_t *pud;
+- pmd_t *pmd;
+- pte_t *pte;
+- int g,u,m;
+- unsigned int cpu, seq;
+- multicall_entry_t *mcl;
+-
+- cpu = get_cpu();
+-
+- /*
+- * Cannot iterate up to USER_PTRS_PER_PGD as these pagetables may not
+- * be the 'current' task's pagetables (e.g., current may be 32-bit,
+- * but the pagetables may be for a 64-bit task).
+- * Subtracting 1 from TASK_SIZE64 means the loop limit is correct
+- * regardless of whether TASK_SIZE64 is a multiple of PGDIR_SIZE.
+- */
+- for (g = 0, seq = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
+- if (pgd_none(*pgd))
+- continue;
+- pud = pud_offset(pgd, 0);
+- if (PTRS_PER_PUD > 1) /* not folded */
+- seq = pgd_walk_set_prot(pud,flags,cpu,seq);
+- for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
+- if (pud_none(*pud))
+- continue;
+- pmd = pmd_offset(pud, 0);
+- if (PTRS_PER_PMD > 1) /* not folded */
+- seq = pgd_walk_set_prot(pmd,flags,cpu,seq);
+- for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
+- if (pmd_none(*pmd))
+- continue;
+- pte = pte_offset_kernel(pmd,0);
+- seq = pgd_walk_set_prot(pte,flags,cpu,seq);
+- }
+- }
+- }
+-
+- mcl = per_cpu(pb_mcl, cpu);
+- if (unlikely(seq > PIN_BATCH - 2)) {
+- if (unlikely(HYPERVISOR_multicall_check(mcl, seq, NULL)))
+- BUG();
+- seq = 0;
+- }
+- MULTI_update_va_mapping(mcl + seq,
+- (unsigned long)__user_pgd(pgd_base),
+- pfn_pte(virt_to_phys(__user_pgd(pgd_base))>>PAGE_SHIFT, flags),
+- 0);
+- MULTI_update_va_mapping(mcl + seq + 1,
+- (unsigned long)pgd_base,
+- pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
+- UVMF_TLB_FLUSH);
+- if (unlikely(HYPERVISOR_multicall_check(mcl, seq + 2, NULL)))
+- BUG();
+-
+- put_cpu();
+-}
+-
+-static void __pgd_pin(pgd_t *pgd)
+-{
+- pgd_walk(pgd, PAGE_KERNEL_RO);
+- xen_pgd_pin(__pa(pgd)); /* kernel */
+- xen_pgd_pin(__pa(__user_pgd(pgd))); /* user */
+- SetPagePinned(virt_to_page(pgd));
+-}
+-
+-static void __pgd_unpin(pgd_t *pgd)
+-{
+- xen_pgd_unpin(__pa(pgd));
+- xen_pgd_unpin(__pa(__user_pgd(pgd)));
+- pgd_walk(pgd, PAGE_KERNEL);
+- ClearPagePinned(virt_to_page(pgd));
+-}
+-
+-void pgd_test_and_unpin(pgd_t *pgd)
+-{
+- if (PagePinned(virt_to_page(pgd)))
+- __pgd_unpin(pgd);
+-}
+-
+-void mm_pin(struct mm_struct *mm)
+-{
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+-
+- pin_lock(mm);
+- __pgd_pin(mm->pgd);
+- pin_unlock(mm);
+-}
+-
+-void mm_unpin(struct mm_struct *mm)
+-{
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+-
+- pin_lock(mm);
+- __pgd_unpin(mm->pgd);
+- pin_unlock(mm);
+-}
+-
+-void mm_pin_all(void)
+-{
+- struct page *page;
+- unsigned long flags;
+-
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+-
+- /*
+- * Allow uninterrupted access to the pgd_list. Also protects
+- * __pgd_pin() by disabling preemption.
+- * All other CPUs must be at a safe point (e.g., in stop_machine
+- * or offlined entirely).
+- */
+- spin_lock_irqsave(&pgd_lock, flags);
+- list_for_each_entry(page, &pgd_list, lru) {
+- if (!PagePinned(page))
+- __pgd_pin((pgd_t *)page_address(page));
+- }
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-}
+-
+-void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+-{
+- if (!PagePinned(virt_to_page(mm->pgd)))
+- mm_pin(mm);
+-}
+-
+-void arch_exit_mmap(struct mm_struct *mm)
+-{
+- struct task_struct *tsk = current;
+-
+- task_lock(tsk);
+-
+- /*
+- * We aggressively remove defunct pgd from cr3. We execute unmap_vmas()
+- * *much* faster this way, as no tlb flushes means bigger wrpt batches.
+- */
+- if (tsk->active_mm == mm) {
+- tsk->active_mm = &init_mm;
+- atomic_inc(&init_mm.mm_count);
+-
+- switch_mm(mm, &init_mm, tsk);
+-
+- atomic_dec(&mm->mm_count);
+- BUG_ON(atomic_read(&mm->mm_count) == 0);
+- }
+-
+- task_unlock(tsk);
+-
+- if (PagePinned(virt_to_page(mm->pgd))
+- && (atomic_read(&mm->mm_count) == 1)
+- && !mm->context.has_foreign_mappings)
+- mm_unpin(mm);
+-}
+-
+-static void _pte_free(struct page *page, unsigned int order)
+-{
+- BUG_ON(order);
+- pte_free(page);
+-}
+-
+-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+-{
+- struct page *pte;
+-
+- pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+- if (pte) {
+- SetPageForeign(pte, _pte_free);
+- init_page_count(pte);
+- }
+- return pte;
+-}
+-
+-void pte_free(struct page *pte)
+-{
+- unsigned long va = (unsigned long)__va(page_to_pfn(pte)<<PAGE_SHIFT);
+-
+- if (!pte_write(*virt_to_ptep(va)))
+- if (HYPERVISOR_update_va_mapping(
+- va, pfn_pte(page_to_pfn(pte), PAGE_KERNEL), 0))
+- BUG();
+-
+- ClearPageForeign(pte);
+- init_page_count(pte);
+-
+- __free_page(pte);
+-}
+-#endif /* CONFIG_XEN */
+-
+-pte_t *lookup_address(unsigned long address)
+-{
+- pgd_t *pgd = pgd_offset_k(address);
+- pud_t *pud;
+- pmd_t *pmd;
+- pte_t *pte;
+- if (pgd_none(*pgd))
+- return NULL;
+- pud = pud_offset(pgd, address);
+- if (!pud_present(*pud))
+- return NULL;
+- pmd = pmd_offset(pud, address);
+- if (!pmd_present(*pmd))
+- return NULL;
+- if (pmd_large(*pmd))
+- return (pte_t *)pmd;
+- pte = pte_offset_kernel(pmd, address);
+- if (pte && !pte_present(*pte))
+- pte = NULL;
+- return pte;
+-}
+-
+-static struct page *split_large_page(unsigned long address, pgprot_t prot,
+- pgprot_t ref_prot)
+-{
+- int i;
+- unsigned long addr;
+- struct page *base = alloc_pages(GFP_KERNEL, 0);
+- pte_t *pbase;
+- if (!base)
+- return NULL;
+- /*
+- * page_private is used to track the number of entries in
+- * the page table page have non standard attributes.
+- */
+- SetPagePrivate(base);
+- page_private(base) = 0;
+-
+- address = __pa(address);
+- addr = address & LARGE_PAGE_MASK;
+- pbase = (pte_t *)page_address(base);
+- for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) {
+- pbase[i] = pfn_pte(addr >> PAGE_SHIFT,
+- addr == address ? prot : ref_prot);
+- }
+- return base;
+-}
+-
+-void clflush_cache_range(void *adr, int size)
+-{
+- int i;
+- for (i = 0; i < size; i += boot_cpu_data.x86_clflush_size)
+- clflush(adr+i);
+-}
+-
+-static void flush_kernel_map(void *arg)
+-{
+- struct list_head *l = (struct list_head *)arg;
+- struct page *pg;
+-
+- /* When clflush is available always use it because it is
+- much cheaper than WBINVD. */
+- /* clflush is still broken. Disable for now. */
+- if (1 || !cpu_has_clflush)
+- asm volatile("wbinvd" ::: "memory");
+- else list_for_each_entry(pg, l, lru) {
+- void *adr = page_address(pg);
+- clflush_cache_range(adr, PAGE_SIZE);
+- }
+- __flush_tlb_all();
+-}
+-
+-static inline void flush_map(struct list_head *l)
+-{
+- on_each_cpu(flush_kernel_map, l, 1, 1);
+-}
+-
+-static LIST_HEAD(deferred_pages); /* protected by init_mm.mmap_sem */
+-
+-static inline void save_page(struct page *fpage)
+-{
+- if (!test_and_set_bit(PG_arch_1, &fpage->flags))
+- list_add(&fpage->lru, &deferred_pages);
+-}
+-
+-/*
+- * No more special protections in this 2/4MB area - revert to a
+- * large page again.
+- */
+-static void revert_page(unsigned long address, pgprot_t ref_prot)
+-{
+- pgd_t *pgd;
+- pud_t *pud;
+- pmd_t *pmd;
+- pte_t large_pte;
+- unsigned long pfn;
+-
+- pgd = pgd_offset_k(address);
+- BUG_ON(pgd_none(*pgd));
+- pud = pud_offset(pgd,address);
+- BUG_ON(pud_none(*pud));
+- pmd = pmd_offset(pud, address);
+- BUG_ON(__pmd_val(*pmd) & _PAGE_PSE);
+- pfn = (__pa(address) & LARGE_PAGE_MASK) >> PAGE_SHIFT;
+- large_pte = pfn_pte(pfn, ref_prot);
+- large_pte = pte_mkhuge(large_pte);
+- set_pte((pte_t *)pmd, large_pte);
+-}
+-
+-static int
+-__change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot,
+- pgprot_t ref_prot)
+-{
+- pte_t *kpte;
+- struct page *kpte_page;
+- pgprot_t ref_prot2;
+-
+- kpte = lookup_address(address);
+- if (!kpte) return 0;
+- kpte_page = virt_to_page(((unsigned long)kpte) & PAGE_MASK);
+- BUG_ON(PageLRU(kpte_page));
+- BUG_ON(PageCompound(kpte_page));
+- if (pgprot_val(prot) != pgprot_val(ref_prot)) {
+- if (!pte_huge(*kpte)) {
+- set_pte(kpte, pfn_pte(pfn, prot));
+- } else {
+- /*
+- * split_large_page will take the reference for this
+- * change_page_attr on the split page.
+- */
+- struct page *split;
+- ref_prot2 = pte_pgprot(pte_clrhuge(*kpte));
+- split = split_large_page(address, prot, ref_prot2);
+- if (!split)
+- return -ENOMEM;
+- pgprot_val(ref_prot2) &= ~_PAGE_NX;
+- set_pte(kpte, mk_pte(split, ref_prot2));
+- kpte_page = split;
+- }
+- page_private(kpte_page)++;
+- } else if (!pte_huge(*kpte)) {
+- set_pte(kpte, pfn_pte(pfn, ref_prot));
+- BUG_ON(page_private(kpte_page) == 0);
+- page_private(kpte_page)--;
+- } else
+- BUG();
+-
+- /* on x86-64 the direct mapping set at boot is not using 4k pages */
+- /*
+- * ..., but the XEN guest kernels (currently) do:
+- * If the pte was reserved, it means it was created at boot
+- * time (not via split_large_page) and in turn we must not
+- * replace it with a large page.
+- */
+-#ifndef CONFIG_XEN
+- BUG_ON(PageReserved(kpte_page));
+-#else
+- if (PageReserved(kpte_page))
+- return 0;
+-#endif
+-
+- save_page(kpte_page);
+- if (page_private(kpte_page) == 0)
+- revert_page(address, ref_prot);
+- return 0;
+-}
+-
+-/*
+- * Change the page attributes of an page in the linear mapping.
+- *
+- * This should be used when a page is mapped with a different caching policy
+- * than write-back somewhere - some CPUs do not like it when mappings with
+- * different caching policies exist. This changes the page attributes of the
+- * in kernel linear mapping too.
+- *
+- * The caller needs to ensure that there are no conflicting mappings elsewhere.
+- * This function only deals with the kernel linear map.
+- *
+- * Caller must call global_flush_tlb() after this.
+- */
+-int change_page_attr_addr(unsigned long address, int numpages, pgprot_t prot)
+-{
+- int err = 0, kernel_map = 0;
+- int i;
+-
+- if (address >= __START_KERNEL_map
+- && address < __START_KERNEL_map + KERNEL_TEXT_SIZE) {
+- address = (unsigned long)__va(__pa(address));
+- kernel_map = 1;
+- }
+-
+- down_write(&init_mm.mmap_sem);
+- for (i = 0; i < numpages; i++, address += PAGE_SIZE) {
+- unsigned long pfn = __pa(address) >> PAGE_SHIFT;
+-
+- if (!kernel_map || pte_present(pfn_pte(0, prot))) {
+- err = __change_page_attr(address, pfn, prot, PAGE_KERNEL);
+- if (err)
+- break;
+- }
+- /* Handle kernel mapping too which aliases part of the
+- * lowmem */
+- if (__pa(address) < KERNEL_TEXT_SIZE) {
+- unsigned long addr2;
+- pgprot_t prot2;
+- addr2 = __START_KERNEL_map + __pa(address);
+- /* Make sure the kernel mappings stay executable */
+- prot2 = pte_pgprot(pte_mkexec(pfn_pte(0, prot)));
+- err = __change_page_attr(addr2, pfn, prot2,
+- PAGE_KERNEL_EXEC);
+- }
+- }
+- up_write(&init_mm.mmap_sem);
+- return err;
+-}
+-
+-/* Don't call this for MMIO areas that may not have a mem_map entry */
+-int change_page_attr(struct page *page, int numpages, pgprot_t prot)
+-{
+- unsigned long addr = (unsigned long)page_address(page);
+- return change_page_attr_addr(addr, numpages, prot);
+-}
+-
+-void global_flush_tlb(void)
+-{
+- struct page *pg, *next;
+- struct list_head l;
+-
+- /*
+- * Write-protect the semaphore, to exclude two contexts
+- * doing a list_replace_init() call in parallel and to
+- * exclude new additions to the deferred_pages list:
+- */
+- down_write(&init_mm.mmap_sem);
+- list_replace_init(&deferred_pages, &l);
+- up_write(&init_mm.mmap_sem);
+-
+- flush_map(&l);
+-
+- list_for_each_entry_safe(pg, next, &l, lru) {
+- list_del(&pg->lru);
+- clear_bit(PG_arch_1, &pg->flags);
+- if (page_private(pg) != 0)
+- continue;
+- ClearPagePrivate(pg);
+- __free_page(pg);
+- }
+-}
+-
+-EXPORT_SYMBOL(change_page_attr);
+-EXPORT_SYMBOL(global_flush_tlb);
+--- /dev/null
++++ b/arch/x86/mm/pageattr-xen.c
+@@ -0,0 +1,1412 @@
++/*
++ * Copyright 2002 Andi Kleen, SuSE Labs.
++ * Thanks to Ben LaHaise for precious feedback.
++ */
++#include <linux/highmem.h>
++#include <linux/bootmem.h>
++#include <linux/module.h>
++#include <linux/sched.h>
++#include <linux/slab.h>
++#include <linux/mm.h>
++#include <linux/interrupt.h>
++
++#include <asm/e820.h>
++#include <asm/processor.h>
++#include <asm/tlbflush.h>
++#include <asm/sections.h>
++#include <asm/uaccess.h>
++#include <asm/pgalloc.h>
++#include <asm/proto.h>
++#include <asm/mmu_context.h>
++
++#ifndef CONFIG_X86_64
++#define TASK_SIZE64 TASK_SIZE
++#endif
++
++static void _pin_lock(struct mm_struct *mm, int lock) {
++ if (lock)
++ spin_lock(&mm->page_table_lock);
++#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
++ /* While mm->page_table_lock protects us against insertions and
++ * removals of higher level page table pages, it doesn't protect
++ * against updates of pte-s. Such updates, however, require the
++ * pte pages to be in consistent state (unpinned+writable or
++ * pinned+readonly). The pinning and attribute changes, however
++ * cannot be done atomically, which is why such updates must be
++ * prevented from happening concurrently.
++ * Note that no pte lock can ever elsewhere be acquired nesting
++ * with an already acquired one in the same mm, or with the mm's
++ * page_table_lock already acquired, as that would break in the
++ * non-split case (where all these are actually resolving to the
++ * one page_table_lock). Thus acquiring all of them here is not
++ * going to result in dead locks, and the order of acquires
++ * doesn't matter.
++ */
++ {
++ pgd_t *pgd = mm->pgd;
++ unsigned g;
++
++ for (g = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
++ pud_t *pud;
++ unsigned u;
++
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ pmd_t *pmd;
++ unsigned m;
++
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++ spinlock_t *ptl;
++
++ if (pmd_none(*pmd))
++ continue;
++ ptl = pte_lockptr(0, pmd);
++ if (lock)
++ spin_lock(ptl);
++ else
++ spin_unlock(ptl);
++ }
++ }
++ }
++ }
++#endif
++ if (!lock)
++ spin_unlock(&mm->page_table_lock);
++}
++#define pin_lock(mm) _pin_lock(mm, 1)
++#define pin_unlock(mm) _pin_lock(mm, 0)
++
++#define PIN_BATCH sizeof(void *)
++static DEFINE_PER_CPU(multicall_entry_t[PIN_BATCH], pb_mcl);
++
++static inline unsigned int pgd_walk_set_prot(struct page *page, pgprot_t flags,
++ unsigned int cpu, unsigned int seq)
++{
++ unsigned long pfn = page_to_pfn(page);
++
++ if (PageHighMem(page)) {
++ if (pgprot_val(flags) & _PAGE_RW)
++ ClearPagePinned(page);
++ else
++ SetPagePinned(page);
++ } else {
++ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, flags), 0);
++ if (unlikely(++seq == PIN_BATCH)) {
++ if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
++ PIN_BATCH, NULL)))
++ BUG();
++ seq = 0;
++ }
++ }
++
++ return seq;
++}
++
++static void pgd_walk(pgd_t *pgd_base, pgprot_t flags)
++{
++ pgd_t *pgd = pgd_base;
++ pud_t *pud;
++ pmd_t *pmd;
++ int g,u,m;
++ unsigned int cpu, seq;
++ multicall_entry_t *mcl;
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return;
++
++ cpu = get_cpu();
++
++ /*
++ * Cannot iterate up to USER_PTRS_PER_PGD on x86-64 as these pagetables
++ * may not be the 'current' task's pagetables (e.g., current may be
++ * 32-bit, but the pagetables may be for a 64-bit task).
++ * Subtracting 1 from TASK_SIZE64 means the loop limit is correct
++ * regardless of whether TASK_SIZE64 is a multiple of PGDIR_SIZE.
++ */
++ for (g = 0, seq = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ if (PTRS_PER_PUD > 1) /* not folded */
++ seq = pgd_walk_set_prot(virt_to_page(pud),flags,cpu,seq);
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ if (PTRS_PER_PMD > 1) /* not folded */
++ seq = pgd_walk_set_prot(virt_to_page(pmd),flags,cpu,seq);
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++ if (pmd_none(*pmd))
++ continue;
++ seq = pgd_walk_set_prot(pmd_page(*pmd),flags,cpu,seq);
++ }
++ }
++ }
++
++ mcl = per_cpu(pb_mcl, cpu);
++#ifdef CONFIG_X86_64
++ if (unlikely(seq > PIN_BATCH - 2)) {
++ if (unlikely(HYPERVISOR_multicall_check(mcl, seq, NULL)))
++ BUG();
++ seq = 0;
++ }
++ MULTI_update_va_mapping(mcl + seq,
++ (unsigned long)__user_pgd(pgd_base),
++ pfn_pte(virt_to_phys(__user_pgd(pgd_base))>>PAGE_SHIFT, flags),
++ 0);
++ MULTI_update_va_mapping(mcl + seq + 1,
++ (unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH);
++ if (unlikely(HYPERVISOR_multicall_check(mcl, seq + 2, NULL)))
++ BUG();
++#else
++ if (likely(seq != 0)) {
++ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
++ (unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH);
++ if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
++ seq + 1, NULL)))
++ BUG();
++ } else if(HYPERVISOR_update_va_mapping((unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH))
++ BUG();
++#endif
++
++ put_cpu();
++}
++
++static void __pgd_pin(pgd_t *pgd)
++{
++ pgd_walk(pgd, PAGE_KERNEL_RO);
++ kmap_flush_unused();
++ xen_pgd_pin(__pa(pgd)); /* kernel */
++#ifdef CONFIG_X86_64
++ xen_pgd_pin(__pa(__user_pgd(pgd))); /* user */
++#endif
++ SetPagePinned(virt_to_page(pgd));
++}
++
++static void __pgd_unpin(pgd_t *pgd)
++{
++ xen_pgd_unpin(__pa(pgd));
++#ifdef CONFIG_X86_64
++ xen_pgd_unpin(__pa(__user_pgd(pgd)));
++#endif
++ pgd_walk(pgd, PAGE_KERNEL);
++ ClearPagePinned(virt_to_page(pgd));
++}
++
++void pgd_test_and_unpin(pgd_t *pgd)
++{
++ if (PagePinned(virt_to_page(pgd)))
++ __pgd_unpin(pgd);
++}
++
++void mm_pin(struct mm_struct *mm)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ pin_lock(mm);
++ __pgd_pin(mm->pgd);
++ pin_unlock(mm);
++}
++
++void mm_unpin(struct mm_struct *mm)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ pin_lock(mm);
++ __pgd_unpin(mm->pgd);
++ pin_unlock(mm);
++}
++
++void mm_pin_all(void)
++{
++ struct page *page;
++ unsigned long flags;
++
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ /*
++ * Allow uninterrupted access to the pgd_list. Also protects
++ * __pgd_pin() by disabling preemption.
++ * All other CPUs must be at a safe point (e.g., in stop_machine
++ * or offlined entirely).
++ */
++ spin_lock_irqsave(&pgd_lock, flags);
++ list_for_each_entry(page, &pgd_list, lru) {
++ if (!PagePinned(page))
++ __pgd_pin((pgd_t *)page_address(page));
++ }
++ spin_unlock_irqrestore(&pgd_lock, flags);
++}
++
++void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
++{
++ if (!PagePinned(virt_to_page(mm->pgd)))
++ mm_pin(mm);
++}
++
++void arch_exit_mmap(struct mm_struct *mm)
++{
++ struct task_struct *tsk = current;
++
++ task_lock(tsk);
++
++ /*
++ * We aggressively remove defunct pgd from cr3. We execute unmap_vmas()
++ * *much* faster this way, as no tlb flushes means bigger wrpt batches.
++ */
++ if (tsk->active_mm == mm) {
++ tsk->active_mm = &init_mm;
++ atomic_inc(&init_mm.mm_count);
++
++ switch_mm(mm, &init_mm, tsk);
++
++ atomic_dec(&mm->mm_count);
++ BUG_ON(atomic_read(&mm->mm_count) == 0);
++ }
++
++ task_unlock(tsk);
++
++ if (PagePinned(virt_to_page(mm->pgd))
++ && atomic_read(&mm->mm_count) == 1
++ && !mm->context.has_foreign_mappings)
++ mm_unpin(mm);
++}
++
++static void _pte_free(struct page *page, unsigned int order)
++{
++ BUG_ON(order);
++ __pte_free(page);
++}
++
++pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
++{
++ struct page *pte;
++
++#ifdef CONFIG_HIGHPTE
++ pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO, 0);
++#else
++ pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
++#endif
++ if (pte) {
++ pgtable_page_ctor(pte);
++ SetPageForeign(pte, _pte_free);
++ init_page_count(pte);
++ }
++ return pte;
++}
++
++void __pte_free(pgtable_t pte)
++{
++ if (!PageHighMem(pte)) {
++ unsigned long va = (unsigned long)page_address(pte);
++ unsigned int level;
++ pte_t *ptep = lookup_address(va, &level);
++
++ BUG_ON(!ptep || level != PG_LEVEL_4K || !pte_present(*ptep));
++ if (!pte_write(*ptep)
++ && HYPERVISOR_update_va_mapping(va,
++ mk_pte(pte, PAGE_KERNEL),
++ 0))
++ BUG();
++ } else
++#ifdef CONFIG_HIGHPTE
++ ClearPagePinned(pte);
++#else
++ BUG();
++#endif
++
++ ClearPageForeign(pte);
++ init_page_count(pte);
++ pgtable_page_dtor(pte);
++ __free_page(pte);
++}
++
++#if PAGETABLE_LEVELS >= 3
++static void _pmd_free(struct page *page, unsigned int order)
++{
++ BUG_ON(order);
++ __pmd_free(page);
++}
++
++pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
++{
++ struct page *pmd;
++
++ pmd = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
++ if (!pmd)
++ return NULL;
++ SetPageForeign(pmd, _pmd_free);
++ init_page_count(pmd);
++ return page_address(pmd);
++}
++
++void __pmd_free(pgtable_t pmd)
++{
++ unsigned long va = (unsigned long)page_address(pmd);
++ unsigned int level;
++ pte_t *ptep = lookup_address(va, &level);
++
++ BUG_ON(!ptep || level != PG_LEVEL_4K || !pte_present(*ptep));
++ if (!pte_write(*ptep)
++ && HYPERVISOR_update_va_mapping(va, mk_pte(pmd, PAGE_KERNEL), 0))
++ BUG();
++
++ ClearPageForeign(pmd);
++ init_page_count(pmd);
++ __free_page(pmd);
++}
++#endif
++
++/* blktap and gntdev need this, as otherwise they would implicitly (and
++ * needlessly, as they never use it) reference init_mm. */
++pte_t xen_ptep_get_and_clear_full(struct vm_area_struct *vma,
++ unsigned long addr, pte_t *ptep, int full)
++{
++ return ptep_get_and_clear_full(vma->vm_mm, addr, ptep, full);
++}
++EXPORT_SYMBOL_GPL(xen_ptep_get_and_clear_full);
++
++/*
++ * The current flushing context - we pass it instead of 5 arguments:
++ */
++struct cpa_data {
++ unsigned long vaddr;
++ pgprot_t mask_set;
++ pgprot_t mask_clr;
++ int numpages;
++ int flushtlb;
++ unsigned long pfn;
++};
++
++#ifdef CONFIG_X86_64
++
++static inline unsigned long highmap_start_pfn(void)
++{
++ return __pa(_text) >> PAGE_SHIFT;
++}
++
++static inline unsigned long highmap_end_pfn(void)
++{
++ return __pa(round_up((unsigned long)_end, PMD_SIZE)) >> PAGE_SHIFT;
++}
++
++#endif
++
++#ifdef CONFIG_DEBUG_PAGEALLOC
++# define debug_pagealloc 1
++#else
++# define debug_pagealloc 0
++#endif
++
++static inline int
++within(unsigned long addr, unsigned long start, unsigned long end)
++{
++ return addr >= start && addr < end;
++}
++
++/*
++ * Flushing functions
++ */
++
++/**
++ * clflush_cache_range - flush a cache range with clflush
++ * @addr: virtual start address
++ * @size: number of bytes to flush
++ *
++ * clflush is an unordered instruction which needs fencing with mfence
++ * to avoid ordering issues.
++ */
++void clflush_cache_range(void *vaddr, unsigned int size)
++{
++ void *vend = vaddr + size - 1;
++
++ mb();
++
++ for (; vaddr < vend; vaddr += boot_cpu_data.x86_clflush_size)
++ clflush(vaddr);
++ /*
++ * Flush any possible final partial cacheline:
++ */
++ clflush(vend);
++
++ mb();
++}
++
++static void __cpa_flush_all(void *arg)
++{
++ unsigned long cache = (unsigned long)arg;
++
++ /*
++ * Flush all to work around Errata in early athlons regarding
++ * large page flushing.
++ */
++ __flush_tlb_all();
++
++ if (cache && boot_cpu_data.x86_model >= 4)
++ wbinvd();
++}
++
++static void cpa_flush_all(unsigned long cache)
++{
++ BUG_ON(irqs_disabled());
++
++ on_each_cpu(__cpa_flush_all, (void *) cache, 1, 1);
++}
++
++static void __cpa_flush_range(void *arg)
++{
++ /*
++ * We could optimize that further and do individual per page
++ * tlb invalidates for a low number of pages. Caveat: we must
++ * flush the high aliases on 64bit as well.
++ */
++ __flush_tlb_all();
++}
++
++static void cpa_flush_range(unsigned long start, int numpages, int cache)
++{
++ unsigned int i, level;
++ unsigned long addr;
++
++ BUG_ON(irqs_disabled());
++ WARN_ON(PAGE_ALIGN(start) != start);
++
++ on_each_cpu(__cpa_flush_range, NULL, 1, 1);
++
++ if (!cache)
++ return;
++
++ /*
++ * We only need to flush on one CPU,
++ * clflush is a MESI-coherent instruction that
++ * will cause all other CPUs to flush the same
++ * cachelines:
++ */
++ for (i = 0, addr = start; i < numpages; i++, addr += PAGE_SIZE) {
++ pte_t *pte = lookup_address(addr, &level);
++
++ /*
++ * Only flush present addresses:
++ */
++ if (pte && (__pte_val(*pte) & _PAGE_PRESENT))
++ clflush_cache_range((void *) addr, PAGE_SIZE);
++ }
++}
++
++/*
++ * Certain areas of memory on x86 require very specific protection flags,
++ * for example the BIOS area or kernel text. Callers don't always get this
++ * right (again, ioremap() on BIOS memory is not uncommon) so this function
++ * checks and fixes these known static required protection bits.
++ */
++static inline pgprot_t static_protections(pgprot_t prot, unsigned long address,
++ unsigned long pfn)
++{
++ pgprot_t forbidden = __pgprot(0);
++
++#ifndef CONFIG_XEN
++ /*
++ * The BIOS area between 640k and 1Mb needs to be executable for
++ * PCI BIOS based config access (CONFIG_PCI_GOBIOS) support.
++ */
++ if (within(pfn, BIOS_BEGIN >> PAGE_SHIFT, BIOS_END >> PAGE_SHIFT))
++ pgprot_val(forbidden) |= _PAGE_NX;
++#endif
++
++ /*
++ * The kernel text needs to be executable for obvious reasons
++ * Does not cover __inittext since that is gone later on. On
++ * 64bit we do not enforce !NX on the low mapping
++ */
++ if (within(address, (unsigned long)_text, (unsigned long)_etext))
++ pgprot_val(forbidden) |= _PAGE_NX;
++
++ /*
++ * The .rodata section needs to be read-only. Using the pfn
++ * catches all aliases.
++ */
++ if (within(pfn, __pa((unsigned long)__start_rodata) >> PAGE_SHIFT,
++ __pa((unsigned long)__end_rodata) >> PAGE_SHIFT))
++ pgprot_val(forbidden) |= _PAGE_RW;
++
++ prot = __pgprot(pgprot_val(prot) & ~pgprot_val(forbidden));
++
++ return prot;
++}
++
++/*
++ * Lookup the page table entry for a virtual address. Return a pointer
++ * to the entry and the level of the mapping.
++ *
++ * Note: We return pud and pmd either when the entry is marked large
++ * or when the present bit is not set. Otherwise we would return a
++ * pointer to a nonexisting mapping.
++ */
++pte_t *lookup_address(unsigned long address, unsigned int *level)
++{
++ pgd_t *pgd = pgd_offset_k(address);
++ pud_t *pud;
++ pmd_t *pmd;
++
++ *level = PG_LEVEL_NONE;
++
++ if (pgd_none(*pgd))
++ return NULL;
++
++ pud = pud_offset(pgd, address);
++ if (pud_none(*pud))
++ return NULL;
++
++ *level = PG_LEVEL_1G;
++ if (pud_large(*pud) || !pud_present(*pud))
++ return (pte_t *)pud;
++
++ pmd = pmd_offset(pud, address);
++ if (pmd_none(*pmd))
++ return NULL;
++
++ *level = PG_LEVEL_2M;
++ if (pmd_large(*pmd) || !pmd_present(*pmd))
++ return (pte_t *)pmd;
++
++ *level = PG_LEVEL_4K;
++
++ return pte_offset_kernel(pmd, address);
++}
++
++/*
++ * Set the new pmd in all the pgds we know about:
++ */
++static void __set_pmd_pte(pte_t *kpte, unsigned long address,
++ unsigned int level, pte_t pte)
++{
++ /* change init_mm */
++ switch(level) {
++ case PG_LEVEL_2M:
++ xen_l2_entry_update((pmd_t *)kpte, __pmd_ma(__pte_val(pte)));
++ break;
++#ifdef CONFIG_X86_64
++ case PG_LEVEL_1G:
++ xen_l3_entry_update((pud_t *)kpte, __pud_ma(__pte_val(pte)));
++ break;
++#endif
++ default:
++ BUG();
++ }
++#ifdef CONFIG_X86_32
++ if (!SHARED_KERNEL_PMD) {
++ struct page *page;
++
++ list_for_each_entry(page, &pgd_list, lru) {
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++
++ pgd = (pgd_t *)page_address(page) + pgd_index(address);
++ pud = pud_offset(pgd, address);
++ pmd = pmd_offset(pud, address);
++ xen_l2_entry_update(pmd, __pmd_ma(__pte_val(pte)));
++ }
++ }
++#endif
++}
++
++static int
++try_preserve_large_page(pte_t *kpte, unsigned long address,
++ struct cpa_data *cpa)
++{
++ unsigned long nextpage_addr, numpages, pmask, psize, flags, addr, pfn;
++ pte_t new_pte, old_pte, *tmp;
++ pgprot_t old_prot, new_prot;
++ int i, do_split = 1;
++ unsigned int level;
++
++ spin_lock_irqsave(&pgd_lock, flags);
++ /*
++ * Check for races, another CPU might have split this page
++ * up already:
++ */
++ tmp = lookup_address(address, &level);
++ if (tmp != kpte)
++ goto out_unlock;
++
++ switch (level) {
++ case PG_LEVEL_2M:
++ psize = PMD_PAGE_SIZE;
++ pmask = PMD_PAGE_MASK;
++ break;
++#ifdef CONFIG_X86_64
++ case PG_LEVEL_1G:
++ psize = PUD_PAGE_SIZE;
++ pmask = PUD_PAGE_MASK;
++ break;
++#endif
++ default:
++ do_split = -EINVAL;
++ goto out_unlock;
++ }
++
++ /*
++ * Calculate the number of pages, which fit into this large
++ * page starting at address:
++ */
++ nextpage_addr = (address + psize) & pmask;
++ numpages = (nextpage_addr - address) >> PAGE_SHIFT;
++ if (numpages < cpa->numpages)
++ cpa->numpages = numpages;
++
++ /*
++ * We are safe now. Check whether the new pgprot is the same:
++ */
++ old_pte = *kpte;
++ old_prot = new_prot = pte_pgprot(old_pte);
++
++ pgprot_val(new_prot) &= ~pgprot_val(cpa->mask_clr);
++ pgprot_val(new_prot) |= pgprot_val(cpa->mask_set);
++
++ /*
++ * old_pte points to the large page base address. So we need
++ * to add the offset of the virtual address:
++ */
++ pfn = pte_pfn(old_pte) + ((address & (psize - 1)) >> PAGE_SHIFT);
++ cpa->pfn = pfn;
++
++ new_prot = static_protections(new_prot, address, pfn);
++
++ /*
++ * We need to check the full range, whether
++ * static_protection() requires a different pgprot for one of
++ * the pages in the range we try to preserve:
++ */
++ if (pfn < max_mapnr) {
++ addr = address + PAGE_SIZE;
++ for (i = 1; i < cpa->numpages && ++pfn < max_mapnr;
++ i++, addr += PAGE_SIZE) {
++ pgprot_t chk_prot = static_protections(new_prot, addr, pfn);
++
++ if (pgprot_val(chk_prot) != pgprot_val(new_prot))
++ goto out_unlock;
++ }
++ }
++
++ /*
++ * If there are no changes, return. maxpages has been updated
++ * above:
++ */
++ if (pgprot_val(new_prot) == pgprot_val(old_prot)) {
++ do_split = 0;
++ goto out_unlock;
++ }
++
++ /*
++ * We need to change the attributes. Check, whether we can
++ * change the large page in one go. We request a split, when
++ * the address is not aligned and the number of pages is
++ * smaller than the number of pages in the large page. Note
++ * that we limited the number of possible pages already to
++ * the number of pages in the large page.
++ */
++ if (address == (nextpage_addr - psize) && cpa->numpages == numpages) {
++ /*
++ * The address is aligned and the number of pages
++ * covers the full page.
++ */
++ new_pte = pfn_pte_ma(__pte_mfn(old_pte), canon_pgprot(new_prot));
++ __set_pmd_pte(kpte, address, level, new_pte);
++ cpa->flushtlb = 1;
++ do_split = 0;
++ }
++
++out_unlock:
++ spin_unlock_irqrestore(&pgd_lock, flags);
++
++ return do_split;
++}
++
++static LIST_HEAD(page_pool);
++static unsigned long pool_size, pool_pages, pool_low;
++static unsigned long pool_used, pool_failed;
++
++static void cpa_fill_pool(struct page **ret)
++{
++ gfp_t gfp = GFP_KERNEL;
++ unsigned long flags;
++ struct page *p;
++
++ /*
++ * Avoid recursion (on debug-pagealloc) and also signal
++ * our priority to get to these pagetables:
++ */
++ if (current->flags & PF_MEMALLOC)
++ return;
++ current->flags |= PF_MEMALLOC;
++
++ /*
++ * Allocate atomically from atomic contexts:
++ */
++ if (in_atomic() || irqs_disabled() || debug_pagealloc)
++ gfp = GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN;
++
++ while (pool_pages < pool_size || (ret && !*ret)) {
++ p = alloc_pages(gfp, 0);
++ if (!p) {
++ pool_failed++;
++ break;
++ }
++ /*
++ * If the call site needs a page right now, provide it:
++ */
++ if (ret && !*ret) {
++ *ret = p;
++ continue;
++ }
++ spin_lock_irqsave(&pgd_lock, flags);
++ list_add(&p->lru, &page_pool);
++ pool_pages++;
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ }
++
++ current->flags &= ~PF_MEMALLOC;
++}
++
++#define SHIFT_MB (20 - PAGE_SHIFT)
++#define ROUND_MB_GB ((1 << 10) - 1)
++#define SHIFT_MB_GB 10
++#define POOL_PAGES_PER_GB 16
++
++void __init cpa_init(void)
++{
++ struct sysinfo si;
++ unsigned long gb;
++
++ si_meminfo(&si);
++ /*
++ * Calculate the number of pool pages:
++ *
++ * Convert totalram (nr of pages) to MiB and round to the next
++ * GiB. Shift MiB to Gib and multiply the result by
++ * POOL_PAGES_PER_GB:
++ */
++ if (debug_pagealloc) {
++ gb = ((si.totalram >> SHIFT_MB) + ROUND_MB_GB) >> SHIFT_MB_GB;
++ pool_size = POOL_PAGES_PER_GB * gb;
++ } else {
++ pool_size = 1;
++ }
++ pool_low = pool_size;
++
++ cpa_fill_pool(NULL);
++ printk(KERN_DEBUG
++ "CPA: page pool initialized %lu of %lu pages preallocated\n",
++ pool_pages, pool_size);
++}
++
++static int split_large_page(pte_t *kpte, unsigned long address)
++{
++ unsigned long flags, mfn, mfninc = 1;
++ unsigned int i, level;
++ pte_t *pbase, *tmp;
++ pgprot_t ref_prot;
++ struct page *base;
++
++ /*
++ * Get a page from the pool. The pool list is protected by the
++ * pgd_lock, which we have to take anyway for the split
++ * operation:
++ */
++ spin_lock_irqsave(&pgd_lock, flags);
++ if (list_empty(&page_pool)) {
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ base = NULL;
++ cpa_fill_pool(&base);
++ if (!base)
++ return -ENOMEM;
++ spin_lock_irqsave(&pgd_lock, flags);
++ } else {
++ base = list_first_entry(&page_pool, struct page, lru);
++ list_del(&base->lru);
++ pool_pages--;
++
++ if (pool_pages < pool_low)
++ pool_low = pool_pages;
++ }
++
++ /*
++ * Check for races, another CPU might have split this page
++ * up for us already:
++ */
++ tmp = lookup_address(address, &level);
++ if (tmp != kpte)
++ goto out_unlock;
++
++ pbase = (pte_t *)page_address(base);
++#ifdef CONFIG_X86_32
++ paravirt_alloc_pt(&init_mm, page_to_pfn(base));
++#endif
++ ref_prot = pte_pgprot(pte_clrhuge(*kpte));
++
++#ifdef CONFIG_X86_64
++ if (level == PG_LEVEL_1G) {
++ mfninc = PMD_PAGE_SIZE >> PAGE_SHIFT;
++ pgprot_val(ref_prot) |= _PAGE_PSE;
++ }
++#endif
++
++ /*
++ * Get the target mfn from the original entry:
++ */
++ mfn = __pte_mfn(*kpte);
++ for (i = 0; i < PTRS_PER_PTE; i++, mfn += mfninc)
++ set_pte(&pbase[i], pfn_pte_ma(mfn, ref_prot));
++
++ /*
++ * Install the new, split up pagetable. Important details here:
++ *
++ * On Intel the NX bit of all levels must be cleared to make a
++ * page executable. See section 4.13.2 of Intel 64 and IA-32
++ * Architectures Software Developer's Manual).
++ *
++ * Mark the entry present. The current mapping might be
++ * set to not present, which we preserved above.
++ */
++ if (HYPERVISOR_update_va_mapping((unsigned long)pbase,
++ mk_pte(base, PAGE_KERNEL_RO), 0))
++ BUG();
++ ref_prot = pte_pgprot(pte_mkexec(pte_clrhuge(*kpte)));
++ pgprot_val(ref_prot) |= _PAGE_PRESENT;
++ __set_pmd_pte(kpte, address, level, mk_pte(base, ref_prot));
++ base = NULL;
++
++out_unlock:
++ /*
++ * If we dropped out via the lookup_address check under
++ * pgd_lock then stick the page back into the pool:
++ */
++ if (base) {
++ list_add(&base->lru, &page_pool);
++ pool_pages++;
++ } else
++ pool_used++;
++ spin_unlock_irqrestore(&pgd_lock, flags);
++
++ return 0;
++}
++
++static int __change_page_attr(struct cpa_data *cpa, int primary)
++{
++ unsigned long address = cpa->vaddr;
++ int do_split, err;
++ unsigned int level;
++ pte_t *kpte, old_pte;
++
++repeat:
++ kpte = lookup_address(address, &level);
++ if (!kpte)
++ return primary ? -EINVAL : 0;
++
++ old_pte = *kpte;
++ if (!__pte_val(old_pte)) {
++ if (!primary)
++ return 0;
++ printk(KERN_WARNING "CPA: called for zero pte. "
++ "vaddr = %lx cpa->vaddr = %lx\n", address,
++ cpa->vaddr);
++ WARN_ON(1);
++ return -EINVAL;
++ }
++
++ if (level == PG_LEVEL_4K) {
++ pte_t new_pte;
++ pgprot_t new_prot = pte_pgprot(old_pte);
++ unsigned long mfn = __pte_mfn(old_pte);
++
++ pgprot_val(new_prot) &= ~pgprot_val(cpa->mask_clr);
++ pgprot_val(new_prot) |= pgprot_val(cpa->mask_set);
++
++ new_prot = static_protections(new_prot, address,
++ mfn_to_local_pfn(mfn));
++
++ /*
++ * We need to keep the mfn from the existing PTE,
++ * after all we're only going to change it's attributes
++ * not the memory it points to
++ */
++ new_pte = pfn_pte_ma(mfn, canon_pgprot(new_prot));
++ cpa->pfn = mfn_to_local_pfn(mfn);
++ /*
++ * Do we really change anything ?
++ */
++ if (__pte_val(old_pte) != __pte_val(new_pte)) {
++ set_pte_atomic(kpte, new_pte);
++ cpa->flushtlb = 1;
++ }
++ cpa->numpages = 1;
++ return 0;
++ }
++
++ /*
++ * Check, whether we can keep the large page intact
++ * and just change the pte:
++ */
++ do_split = try_preserve_large_page(kpte, address, cpa);
++ /*
++ * When the range fits into the existing large page,
++ * return. cp->numpages and cpa->tlbflush have been updated in
++ * try_large_page:
++ */
++ if (do_split <= 0)
++ return do_split;
++
++ /*
++ * We have to split the large page:
++ */
++ err = split_large_page(kpte, address);
++ if (!err) {
++ cpa->flushtlb = 1;
++ goto repeat;
++ }
++
++ return err;
++}
++
++static int __change_page_attr_set_clr(struct cpa_data *cpa, int checkalias);
++
++static int cpa_process_alias(struct cpa_data *cpa)
++{
++ struct cpa_data alias_cpa;
++ int ret = 0;
++
++ if (cpa->pfn > max_pfn_mapped)
++ return 0;
++
++ /*
++ * No need to redo, when the primary call touched the direct
++ * mapping already:
++ */
++ if (!within(cpa->vaddr, PAGE_OFFSET,
++ PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT))) {
++
++ alias_cpa = *cpa;
++ alias_cpa.vaddr = (unsigned long) __va(cpa->pfn << PAGE_SHIFT);
++
++ ret = __change_page_attr_set_clr(&alias_cpa, 0);
++ }
++
++#ifdef CONFIG_X86_64
++ if (ret)
++ return ret;
++ /*
++ * No need to redo, when the primary call touched the high
++ * mapping already:
++ */
++ if (within(cpa->vaddr, (unsigned long) _text, (unsigned long) _end))
++ return 0;
++
++ /*
++ * If the physical address is inside the kernel map, we need
++ * to touch the high mapped kernel as well:
++ */
++ if (!within(cpa->pfn, highmap_start_pfn(), highmap_end_pfn()))
++ return 0;
++
++ alias_cpa = *cpa;
++ alias_cpa.vaddr =
++ (cpa->pfn << PAGE_SHIFT) + __START_KERNEL_map;
++
++ /*
++ * The high mapping range is imprecise, so ignore the return value.
++ */
++ __change_page_attr_set_clr(&alias_cpa, 0);
++#endif
++ return ret;
++}
++
++static int __change_page_attr_set_clr(struct cpa_data *cpa, int checkalias)
++{
++ int ret, numpages = cpa->numpages;
++
++ while (numpages) {
++ /*
++ * Store the remaining nr of pages for the large page
++ * preservation check.
++ */
++ cpa->numpages = numpages;
++
++ ret = __change_page_attr(cpa, checkalias);
++ if (ret)
++ return ret;
++
++ if (checkalias) {
++ ret = cpa_process_alias(cpa);
++ if (ret)
++ return ret;
++ }
++
++ /*
++ * Adjust the number of pages with the result of the
++ * CPA operation. Either a large page has been
++ * preserved or a single page update happened.
++ */
++ BUG_ON(cpa->numpages > numpages);
++ numpages -= cpa->numpages;
++ cpa->vaddr += cpa->numpages * PAGE_SIZE;
++ }
++ return 0;
++}
++
++static inline int cache_attr(pgprot_t attr)
++{
++ return pgprot_val(attr) &
++ (_PAGE_PAT | _PAGE_PAT_LARGE | _PAGE_PWT | _PAGE_PCD);
++}
++
++static int change_page_attr_set_clr(unsigned long addr, int numpages,
++ pgprot_t mask_set, pgprot_t mask_clr)
++{
++ struct cpa_data cpa;
++ int ret, cache, checkalias;
++
++ /*
++ * Check, if we are requested to change a not supported
++ * feature:
++ */
++ mask_set = canon_pgprot(mask_set);
++ mask_clr = canon_pgprot(mask_clr);
++ if (!pgprot_val(mask_set) && !pgprot_val(mask_clr))
++ return 0;
++
++ /* Ensure we are PAGE_SIZE aligned */
++ if (addr & ~PAGE_MASK) {
++ addr &= PAGE_MASK;
++ /*
++ * People should not be passing in unaligned addresses:
++ */
++ WARN_ON_ONCE(1);
++ }
++
++ cpa.vaddr = addr;
++ cpa.numpages = numpages;
++ cpa.mask_set = mask_set;
++ cpa.mask_clr = mask_clr;
++ cpa.flushtlb = 0;
++
++ /* No alias checking for _NX bit modifications */
++ checkalias = (pgprot_val(mask_set) | pgprot_val(mask_clr)) != _PAGE_NX;
++
++ ret = __change_page_attr_set_clr(&cpa, checkalias);
++
++ /*
++ * Check whether we really changed something:
++ */
++ if (!cpa.flushtlb)
++ goto out;
++
++ /*
++ * No need to flush, when we did not set any of the caching
++ * attributes:
++ */
++ cache = cache_attr(mask_set);
++
++ /*
++ * On success we use clflush, when the CPU supports it to
++ * avoid the wbindv. If the CPU does not support it and in the
++ * error case we fall back to cpa_flush_all (which uses
++ * wbindv):
++ */
++ if (!ret && cpu_has_clflush)
++ cpa_flush_range(addr, numpages, cache);
++ else
++ cpa_flush_all(cache);
++
++out:
++ cpa_fill_pool(NULL);
++
++ return ret;
++}
++
++static inline int change_page_attr_set(unsigned long addr, int numpages,
++ pgprot_t mask)
++{
++ return change_page_attr_set_clr(addr, numpages, mask, __pgprot(0));
++}
++
++static inline int change_page_attr_clear(unsigned long addr, int numpages,
++ pgprot_t mask)
++{
++ return change_page_attr_set_clr(addr, numpages, __pgprot(0), mask);
++}
++
++int set_memory_uc(unsigned long addr, int numpages)
++{
++ return change_page_attr_set(addr, numpages,
++ __pgprot(_PAGE_PCD));
++}
++EXPORT_SYMBOL(set_memory_uc);
++
++int set_memory_wb(unsigned long addr, int numpages)
++{
++ return change_page_attr_clear(addr, numpages,
++ __pgprot(_PAGE_PCD | _PAGE_PWT));
++}
++EXPORT_SYMBOL(set_memory_wb);
++
++int set_memory_x(unsigned long addr, int numpages)
++{
++ return change_page_attr_clear(addr, numpages, __pgprot(_PAGE_NX));
++}
++EXPORT_SYMBOL(set_memory_x);
++
++int set_memory_nx(unsigned long addr, int numpages)
++{
++ return change_page_attr_set(addr, numpages, __pgprot(_PAGE_NX));
++}
++EXPORT_SYMBOL(set_memory_nx);
++
++int set_memory_ro(unsigned long addr, int numpages)
++{
++ return change_page_attr_clear(addr, numpages, __pgprot(_PAGE_RW));
++}
++
++int set_memory_rw(unsigned long addr, int numpages)
++{
++ return change_page_attr_set(addr, numpages, __pgprot(_PAGE_RW));
++}
++
++int set_memory_np(unsigned long addr, int numpages)
++{
++ return change_page_attr_clear(addr, numpages, __pgprot(_PAGE_PRESENT));
++}
++
++int set_pages_uc(struct page *page, int numpages)
++{
++ unsigned long addr = (unsigned long)page_address(page);
++
++ return set_memory_uc(addr, numpages);
++}
++EXPORT_SYMBOL(set_pages_uc);
++
++int set_pages_wb(struct page *page, int numpages)
++{
++ unsigned long addr = (unsigned long)page_address(page);
++
++ return set_memory_wb(addr, numpages);
++}
++EXPORT_SYMBOL(set_pages_wb);
++
++int set_pages_x(struct page *page, int numpages)
++{
++ unsigned long addr = (unsigned long)page_address(page);
++
++ return set_memory_x(addr, numpages);
++}
++EXPORT_SYMBOL(set_pages_x);
++
++int set_pages_nx(struct page *page, int numpages)
++{
++ unsigned long addr = (unsigned long)page_address(page);
++
++ return set_memory_nx(addr, numpages);
++}
++EXPORT_SYMBOL(set_pages_nx);
++
++int set_pages_ro(struct page *page, int numpages)
++{
++ unsigned long addr = (unsigned long)page_address(page);
++
++ return set_memory_ro(addr, numpages);
++}
++
++int set_pages_rw(struct page *page, int numpages)
++{
++ unsigned long addr = (unsigned long)page_address(page);
++
++ return set_memory_rw(addr, numpages);
++}
++
++#ifdef CONFIG_DEBUG_PAGEALLOC
++
++static int __set_pages_p(struct page *page, int numpages)
++{
++ struct cpa_data cpa = { .vaddr = (unsigned long) page_address(page),
++ .numpages = numpages,
++ .mask_set = __pgprot(_PAGE_PRESENT | _PAGE_RW),
++ .mask_clr = __pgprot(0)};
++
++ return __change_page_attr_set_clr(&cpa, 1);
++}
++
++static int __set_pages_np(struct page *page, int numpages)
++{
++ struct cpa_data cpa = { .vaddr = (unsigned long) page_address(page),
++ .numpages = numpages,
++ .mask_set = __pgprot(0),
++ .mask_clr = __pgprot(_PAGE_PRESENT | _PAGE_RW)};
++
++ return __change_page_attr_set_clr(&cpa, 1);
++}
++
++void kernel_map_pages(struct page *page, int numpages, int enable)
++{
++ if (PageHighMem(page))
++ return;
++ if (!enable) {
++ debug_check_no_locks_freed(page_address(page),
++ numpages * PAGE_SIZE);
++ }
++
++ /*
++ * If page allocator is not up yet then do not call c_p_a():
++ */
++ if (!debug_pagealloc_enabled)
++ return;
++
++ /*
++ * The return value is ignored as the calls cannot fail.
++ * Large pages are kept enabled at boot time, and are
++ * split up quickly with DEBUG_PAGEALLOC. If a splitup
++ * fails here (due to temporary memory shortage) no damage
++ * is done because we just keep the largepage intact up
++ * to the next attempt when it will likely be split up:
++ */
++ if (enable)
++ __set_pages_p(page, numpages);
++ else
++ __set_pages_np(page, numpages);
++
++ /*
++ * We should perform an IPI and flush all tlbs,
++ * but that can deadlock->flush only current cpu:
++ */
++ __flush_tlb_all();
++
++ /*
++ * Try to refill the page pool here. We can do this only after
++ * the tlb flush.
++ */
++ cpa_fill_pool(NULL);
++}
++
++#ifdef CONFIG_HIBERNATION
++
++bool kernel_page_present(struct page *page)
++{
++ unsigned int level;
++ pte_t *pte;
++
++ if (PageHighMem(page))
++ return false;
++
++ pte = lookup_address((unsigned long)page_address(page), &level);
++ return (__pte_val(*pte) & _PAGE_PRESENT);
++}
++
++#endif /* CONFIG_HIBERNATION */
++
++#endif /* CONFIG_DEBUG_PAGEALLOC */
++
++static inline int in_secondary_range(unsigned long va)
++{
++#ifdef CONFIG_X86_64
++ return va >= VMALLOC_START && va < VMALLOC_END;
++#else
++ return va >= (unsigned long)high_memory;
++#endif
++}
++
++static void __make_page_readonly(unsigned long va)
++{
++ pte_t *pte;
++ unsigned int level;
++
++ pte = lookup_address(va, &level);
++ BUG_ON(!pte || level != PG_LEVEL_4K);
++ if (HYPERVISOR_update_va_mapping(va, pte_wrprotect(*pte), 0))
++ BUG();
++ if (in_secondary_range(va)) {
++ unsigned long pfn = pte_pfn(*pte);
++
++#ifdef CONFIG_HIGHMEM
++ if (pfn >= highstart_pfn)
++ kmap_flush_unused(); /* flush stale writable kmaps */
++ else
++#endif
++ __make_page_readonly((unsigned long)__va(pfn << PAGE_SHIFT));
++ }
++}
++
++static void __make_page_writable(unsigned long va)
++{
++ pte_t *pte;
++ unsigned int level;
++
++ pte = lookup_address(va, &level);
++ BUG_ON(!pte || level != PG_LEVEL_4K);
++ if (HYPERVISOR_update_va_mapping(va, pte_mkwrite(*pte), 0))
++ BUG();
++ if (in_secondary_range(va)) {
++ unsigned long pfn = pte_pfn(*pte);
++
++#ifdef CONFIG_HIGHMEM
++ if (pfn < highstart_pfn)
++#endif
++ __make_page_writable((unsigned long)__va(pfn << PAGE_SHIFT));
++ }
++}
++
++void make_page_readonly(void *va, unsigned int feature)
++{
++ if (!xen_feature(feature))
++ __make_page_readonly((unsigned long)va);
++}
++
++void make_page_writable(void *va, unsigned int feature)
++{
++ if (!xen_feature(feature))
++ __make_page_writable((unsigned long)va);
++}
++
++void make_pages_readonly(void *va, unsigned int nr, unsigned int feature)
++{
++ unsigned long addr;
++
++ if (xen_feature(feature))
++ return;
++
++ for (addr = (unsigned long)va; nr--; addr += PAGE_SIZE)
++ __make_page_readonly(addr);
++}
++
++void make_pages_writable(void *va, unsigned int nr, unsigned int feature)
++{
++ unsigned long addr;
++
++ if (xen_feature(feature))
++ return;
++
++ for (addr = (unsigned long)va; nr--; addr += PAGE_SIZE)
++ __make_page_writable(addr);
++}
++
++/*
++ * The testcases use internal knowledge of the implementation that shouldn't
++ * be exposed to the rest of the kernel. Include these directly here.
++ */
++#ifdef CONFIG_CPA_DEBUG
++#include "pageattr-test.c"
++#endif
+--- a/arch/x86/mm/pgtable_32-xen.c
++++ b/arch/x86/mm/pgtable_32-xen.c
+@@ -29,8 +29,6 @@
+ #include <xen/features.h>
+ #include <asm/hypervisor.h>
+
+-static void pgd_test_and_unpin(pgd_t *pgd);
+-
+ void show_mem(void)
+ {
+ int total = 0, reserved = 0;
+@@ -167,53 +165,6 @@ pte_t *pte_alloc_one_kernel(struct mm_st
+ return pte;
+ }
+
+-static void _pte_free(struct page *page, unsigned int order)
+-{
+- BUG_ON(order);
+- pte_free(page);
+-}
+-
+-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+-{
+- struct page *pte;
+-
+-#ifdef CONFIG_HIGHPTE
+- pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO, 0);
+-#else
+- pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+-#endif
+- if (pte) {
+- SetPageForeign(pte, _pte_free);
+- init_page_count(pte);
+- }
+- return pte;
+-}
+-
+-void pte_free(struct page *pte)
+-{
+- unsigned long pfn = page_to_pfn(pte);
+-
+- if (!PageHighMem(pte)) {
+- unsigned long va = (unsigned long)__va(pfn << PAGE_SHIFT);
+-
+- if (!pte_write(*virt_to_ptep(va)))
+- if (HYPERVISOR_update_va_mapping(
+- va, pfn_pte(pfn, PAGE_KERNEL), 0))
+- BUG();
+- } else
+- ClearPagePinned(pte);
+-
+- ClearPageForeign(pte);
+- init_page_count(pte);
+-
+- __free_page(pte);
+-}
+-
+-void pmd_ctor(struct kmem_cache *cache, void *pmd)
+-{
+- memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
+-}
+-
+ /*
+ * List of all pgd's needed for non-PAE so it can invalidate entries
+ * in both cached and uncached pgd's; not needed for PAE since the
+@@ -224,224 +175,191 @@ void pmd_ctor(struct kmem_cache *cache,
+ * vmalloc faults work because attached pagetables are never freed.
+ * -- wli
+ */
+-DEFINE_SPINLOCK(pgd_lock);
+-struct page *pgd_list;
+-
+ static inline void pgd_list_add(pgd_t *pgd)
+ {
+ struct page *page = virt_to_page(pgd);
+- page->index = (unsigned long)pgd_list;
+- if (pgd_list)
+- set_page_private(pgd_list, (unsigned long)&page->index);
+- pgd_list = page;
+- set_page_private(page, (unsigned long)&pgd_list);
++
++ list_add(&page->lru, &pgd_list);
+ }
+
+ static inline void pgd_list_del(pgd_t *pgd)
+ {
+- struct page *next, **pprev, *page = virt_to_page(pgd);
+- next = (struct page *)page->index;
+- pprev = (struct page **)page_private(page);
+- *pprev = next;
+- if (next)
+- set_page_private(next, (unsigned long)pprev);
+-}
++ struct page *page = virt_to_page(pgd);
+
++ list_del(&page->lru);
++}
+
++#define UNSHARED_PTRS_PER_PGD \
++ (SHARED_KERNEL_PMD ? USER_PTRS_PER_PGD : PTRS_PER_PGD)
+
+-#if (PTRS_PER_PMD == 1)
+-/* Non-PAE pgd constructor */
+-static void pgd_ctor(void *pgd)
++static void pgd_ctor(void *p)
+ {
++ pgd_t *pgd = p;
+ unsigned long flags;
+
+- /* !PAE, no pagetable sharing */
++ pgd_test_and_unpin(pgd);
++
++ /* Clear usermode parts of PGD */
+ memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
+
+ spin_lock_irqsave(&pgd_lock, flags);
+
+- /* must happen under lock */
+- clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
+- swapper_pg_dir + USER_PTRS_PER_PGD,
+- KERNEL_PGD_PTRS);
+-
+- paravirt_alloc_pd_clone(__pa(pgd) >> PAGE_SHIFT,
+- __pa(swapper_pg_dir) >> PAGE_SHIFT,
+- USER_PTRS_PER_PGD,
+- KERNEL_PGD_PTRS);
+- pgd_list_add(pgd);
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-}
+-#else /* PTRS_PER_PMD > 1 */
+-/* PAE pgd constructor */
+-static void pgd_ctor(void *pgd)
+-{
+- /* PAE, kernel PMD may be shared */
+-
+- if (SHARED_KERNEL_PMD) {
+- clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
++ /* If the pgd points to a shared pagetable level (either the
++ ptes in non-PAE, or shared PMD in PAE), then just copy the
++ references from swapper_pg_dir. */
++ if (PAGETABLE_LEVELS == 2 ||
++ (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD)) {
++ clone_pgd_range(pgd + USER_PTRS_PER_PGD,
+ swapper_pg_dir + USER_PTRS_PER_PGD,
+ KERNEL_PGD_PTRS);
+- } else {
+- memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
++ paravirt_alloc_pd_clone(__pa(pgd) >> PAGE_SHIFT,
++ __pa(swapper_pg_dir) >> PAGE_SHIFT,
++ USER_PTRS_PER_PGD,
++ KERNEL_PGD_PTRS);
+ }
++
++ /* list required to sync kernel mapping updates */
++ if (PAGETABLE_LEVELS == 2)
++ pgd_list_add(pgd);
++
++ spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+-#endif /* PTRS_PER_PMD */
+
+ static void pgd_dtor(void *pgd)
+ {
+ unsigned long flags; /* can be called from interrupt context */
+
+- if (SHARED_KERNEL_PMD)
+- return;
+-
+- paravirt_release_pd(__pa(pgd) >> PAGE_SHIFT);
+- spin_lock_irqsave(&pgd_lock, flags);
+- pgd_list_del(pgd);
+- spin_unlock_irqrestore(&pgd_lock, flags);
++ if (!SHARED_KERNEL_PMD) {
++ spin_lock_irqsave(&pgd_lock, flags);
++ pgd_list_del(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ }
+
+ pgd_test_and_unpin(pgd);
+ }
+
+-#define UNSHARED_PTRS_PER_PGD \
+- (SHARED_KERNEL_PMD ? USER_PTRS_PER_PGD : PTRS_PER_PGD)
+-
+-/* If we allocate a pmd for part of the kernel address space, then
+- make sure its initialized with the appropriate kernel mappings.
+- Otherwise use a cached zeroed pmd. */
+-static pmd_t *pmd_cache_alloc(int idx)
++#ifdef CONFIG_X86_PAE
++/*
++ * Mop up any pmd pages which may still be attached to the pgd.
++ * Normally they will be freed by munmap/exit_mmap, but any pmd we
++ * preallocate which never got a corresponding vma will need to be
++ * freed manually.
++ */
++static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
+ {
+- pmd_t *pmd;
++ int i;
+
+- if (idx >= USER_PTRS_PER_PGD) {
+- pmd = (pmd_t *)__get_free_page(GFP_KERNEL);
++ for(i = 0; i < UNSHARED_PTRS_PER_PGD; i++) {
++ pgd_t pgd = pgdp[i];
+
+-#ifndef CONFIG_XEN
+- if (pmd)
+- memcpy(pmd,
+- (void *)pgd_page_vaddr(swapper_pg_dir[idx]),
+- sizeof(pmd_t) * PTRS_PER_PMD);
+-#endif
+- } else
+- pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
++ if (__pgd_val(pgd) != 0) {
++ pmd_t *pmd = (pmd_t *)pgd_page_vaddr(pgd);
+
+- return pmd;
+-}
++ pgdp[i] = xen_make_pgd(0);
+
+-static void pmd_cache_free(pmd_t *pmd, int idx)
+-{
+- if (idx >= USER_PTRS_PER_PGD) {
+- make_lowmem_page_writable(pmd, XENFEAT_writable_page_tables);
+- memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
+- free_page((unsigned long)pmd);
+- } else
+- kmem_cache_free(pmd_cache, pmd);
++ paravirt_release_pd(pgd_val(pgd) >> PAGE_SHIFT);
++ pmd_free(mm, pmd);
++ }
++ }
+ }
+
+-pgd_t *pgd_alloc(struct mm_struct *mm)
++/*
++ * In PAE mode, we need to do a cr3 reload (=tlb flush) when
++ * updating the top-level pagetable entries to guarantee the
++ * processor notices the update. Since this is expensive, and
++ * all 4 top-level entries are used almost immediately in a
++ * new process's life, we just pre-populate them here.
++ *
++ * Also, if we're in a paravirt environment where the kernel pmd is
++ * not shared between pagetables (!SHARED_KERNEL_PMDS), we allocate
++ * and initialize the kernel pmds here.
++ */
++static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
+ {
++ pud_t *pud;
++ pmd_t *pmds[UNSHARED_PTRS_PER_PGD];
++ unsigned long addr, flags;
+ int i;
+- pgd_t *pgd = quicklist_alloc(0, GFP_KERNEL, pgd_ctor);
+- pmd_t **pmds = NULL;
+- unsigned long flags;
+-
+- pgd_test_and_unpin(pgd);
+-
+- if (PTRS_PER_PMD == 1 || !pgd)
+- return pgd;
+-
+-#ifdef CONFIG_XEN
+- if (!SHARED_KERNEL_PMD) {
+- /*
+- * We can race save/restore (if we sleep during a GFP_KERNEL memory
+- * allocation). We therefore store virtual addresses of pmds as they
+- * do not change across save/restore, and poke the machine addresses
+- * into the pgdir under the pgd_lock.
+- */
+- pmds = kmalloc(PTRS_PER_PGD * sizeof(pmd_t *), GFP_KERNEL);
+- if (!pmds) {
+- quicklist_free(0, pgd_dtor, pgd);
+- return NULL;
+- }
+- }
+-#endif
+
+- /* Allocate pmds, remember virtual addresses. */
+- for (i = 0; i < UNSHARED_PTRS_PER_PGD; ++i) {
+- pmd_t *pmd = pmd_cache_alloc(i);
+-
+- if (!pmd)
++ /*
++ * We can race save/restore (if we sleep during a GFP_KERNEL memory
++ * allocation). We therefore store virtual addresses of pmds as they
++ * do not change across save/restore, and poke the machine addresses
++ * into the pgdir under the pgd_lock.
++ */
++ for (addr = i = 0; i < UNSHARED_PTRS_PER_PGD; i++, addr += PUD_SIZE) {
++ pmds[i] = pmd_alloc_one(mm, addr);
++ if (!pmds[i])
+ goto out_oom;
+-
+- paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
+- if (pmds)
+- pmds[i] = pmd;
+- else
+- set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
+ }
+
+-#ifdef CONFIG_XEN
+- if (SHARED_KERNEL_PMD)
+- return pgd;
+-
+ spin_lock_irqsave(&pgd_lock, flags);
+
+ /* Protect against save/restore: move below 4GB under pgd_lock. */
+- if (!xen_feature(XENFEAT_pae_pgdir_above_4gb)) {
+- int rc = xen_create_contiguous_region(
+- (unsigned long)pgd, 0, 32);
+- if (rc) {
+- spin_unlock_irqrestore(&pgd_lock, flags);
+- goto out_oom;
+- }
++ if (!xen_feature(XENFEAT_pae_pgdir_above_4gb)
++ && xen_create_contiguous_region((unsigned long)pgd, 0, 32)) {
++ spin_unlock_irqrestore(&pgd_lock, flags);
++out_oom:
++ while (i--)
++ pmd_free(mm, pmds[i]);
++ return 0;
+ }
+
+ /* Copy kernel pmd contents and write-protect the new pmds. */
+- for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
+- memcpy(pmds[i],
+- (void *)pgd_page_vaddr(swapper_pg_dir[i]),
+- sizeof(pmd_t) * PTRS_PER_PMD);
+- make_lowmem_page_readonly(
+- pmds[i], XENFEAT_writable_page_tables);
+- }
++ pud = pud_offset(pgd, 0);
++ for (addr = i = 0; i < UNSHARED_PTRS_PER_PGD;
++ i++, pud++, addr += PUD_SIZE) {
++ if (i >= USER_PTRS_PER_PGD) {
++ memcpy(pmds[i],
++ (pmd_t *)pgd_page_vaddr(swapper_pg_dir[i]),
++ sizeof(pmd_t) * PTRS_PER_PMD);
++ make_lowmem_page_readonly(
++ pmds[i], XENFEAT_writable_page_tables);
++ }
+
+- /* It is safe to poke machine addresses of pmds under the pmd_lock. */
+- for (i = 0; i < PTRS_PER_PGD; i++)
+- set_pgd(&pgd[i], __pgd(1 + __pa(pmds[i])));
++ /* It is safe to poke machine addresses of pmds under the pgd_lock. */
++ pud_populate(mm, pud, pmds[i]);
++ }
+
+- /* Ensure this pgd gets picked up and pinned on save/restore. */
++ /* List required to sync kernel mapping updates and
++ * to pin/unpin on save/restore. */
+ pgd_list_add(pgd);
+
+ spin_unlock_irqrestore(&pgd_lock, flags);
+
+- kfree(pmds);
+-#endif
++ return 1;
++}
++#else /* !CONFIG_X86_PAE */
++/* No need to prepopulate any pagetable entries in non-PAE modes. */
++static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
++{
++ return 1;
++}
+
+- return pgd;
++static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
++{
++}
++#endif /* CONFIG_X86_PAE */
+
+-out_oom:
+- if (!pmds) {
+- for (i--; i >= 0; i--) {
+- pgd_t pgdent = pgd[i];
+- void* pmd = (void *)__va(pgd_val(pgdent)-1);
+- paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+- pmd_cache_free(pmd, i);
+- }
+- } else {
+- for (i--; i >= 0; i--) {
+- paravirt_release_pd(__pa(pmds[i]) >> PAGE_SHIFT);
+- pmd_cache_free(pmds[i], i);
+- }
+- kfree(pmds);
++pgd_t *pgd_alloc(struct mm_struct *mm)
++{
++ pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
++
++ /* so that alloc_pd can use it */
++ mm->pgd = pgd;
++ if (pgd)
++ pgd_ctor(pgd);
++
++ if (pgd && !pgd_prepopulate_pmd(mm, pgd)) {
++ free_page((unsigned long)pgd);
++ pgd = NULL;
+ }
+- quicklist_free(0, pgd_dtor, pgd);
+- return NULL;
++
++ return pgd;
+ }
+
+-void pgd_free(pgd_t *pgd)
++void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+ {
+- int i;
+-
+ /*
+ * After this the pgd should not be pinned for the duration of this
+ * function's execution. We should never sleep and thus never race:
+@@ -450,39 +368,43 @@ void pgd_free(pgd_t *pgd)
+ * 2. The machine addresses in PGD entries will not become invalid
+ * due to a concurrent save/restore.
+ */
+- pgd_test_and_unpin(pgd);
++ pgd_dtor(pgd);
+
+- /* in the PAE case user pgd entries are overwritten before usage */
+- if (PTRS_PER_PMD > 1) {
+- for (i = 0; i < UNSHARED_PTRS_PER_PGD; ++i) {
+- pgd_t pgdent = pgd[i];
+- void* pmd = (void *)__va(pgd_val(pgdent)-1);
+- paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+- pmd_cache_free(pmd, i);
+- }
++ if (PTRS_PER_PMD > 1 && !xen_feature(XENFEAT_pae_pgdir_above_4gb))
++ xen_destroy_contiguous_region((unsigned long)pgd, 0);
+
+- if (!xen_feature(XENFEAT_pae_pgdir_above_4gb))
+- xen_destroy_contiguous_region((unsigned long)pgd, 0);
+- }
++ pgd_mop_up_pmds(mm, pgd);
++ free_page((unsigned long)pgd);
++}
+
+- /* in the non-PAE case, free_pgtables() clears user pgd entries */
+- quicklist_free(0, pgd_dtor, pgd);
++void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
++{
++ pgtable_page_dtor(pte);
++ paravirt_release_pt(page_to_pfn(pte));
++ tlb_remove_page(tlb, pte);
+ }
+
+-void check_pgt_cache(void)
++#ifdef CONFIG_X86_PAE
++
++void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
+ {
+- quicklist_trim(0, pgd_dtor, 25, 16);
++ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
++ tlb_remove_page(tlb, virt_to_page(pmd));
+ }
+
++#endif
++
+ void make_lowmem_page_readonly(void *va, unsigned int feature)
+ {
+ pte_t *pte;
++ unsigned int level;
+ int rc;
+
+ if (xen_feature(feature))
+ return;
+
+- pte = virt_to_ptep(va);
++ pte = lookup_address((unsigned long)va, &level);
++ BUG_ON(!pte || level != PG_LEVEL_4K || !pte_present(*pte));
+ rc = HYPERVISOR_update_va_mapping(
+ (unsigned long)va, pte_wrprotect(*pte), 0);
+ BUG_ON(rc);
+@@ -491,313 +413,15 @@ void make_lowmem_page_readonly(void *va,
+ void make_lowmem_page_writable(void *va, unsigned int feature)
+ {
+ pte_t *pte;
++ unsigned int level;
+ int rc;
+
+ if (xen_feature(feature))
+ return;
+
+- pte = virt_to_ptep(va);
++ pte = lookup_address((unsigned long)va, &level);
++ BUG_ON(!pte || level != PG_LEVEL_4K || !pte_present(*pte));
+ rc = HYPERVISOR_update_va_mapping(
+ (unsigned long)va, pte_mkwrite(*pte), 0);
+ BUG_ON(rc);
+ }
+-
+-void make_page_readonly(void *va, unsigned int feature)
+-{
+- pte_t *pte;
+- int rc;
+-
+- if (xen_feature(feature))
+- return;
+-
+- pte = virt_to_ptep(va);
+- rc = HYPERVISOR_update_va_mapping(
+- (unsigned long)va, pte_wrprotect(*pte), 0);
+- if (rc) /* fallback? */
+- xen_l1_entry_update(pte, pte_wrprotect(*pte));
+- if ((unsigned long)va >= (unsigned long)high_memory) {
+- unsigned long pfn = pte_pfn(*pte);
+-#ifdef CONFIG_HIGHMEM
+- if (pfn >= highstart_pfn)
+- kmap_flush_unused(); /* flush stale writable kmaps */
+- else
+-#endif
+- make_lowmem_page_readonly(
+- phys_to_virt(pfn << PAGE_SHIFT), feature);
+- }
+-}
+-
+-void make_page_writable(void *va, unsigned int feature)
+-{
+- pte_t *pte;
+- int rc;
+-
+- if (xen_feature(feature))
+- return;
+-
+- pte = virt_to_ptep(va);
+- rc = HYPERVISOR_update_va_mapping(
+- (unsigned long)va, pte_mkwrite(*pte), 0);
+- if (rc) /* fallback? */
+- xen_l1_entry_update(pte, pte_mkwrite(*pte));
+- if ((unsigned long)va >= (unsigned long)high_memory) {
+- unsigned long pfn = pte_pfn(*pte);
+-#ifdef CONFIG_HIGHMEM
+- if (pfn < highstart_pfn)
+-#endif
+- make_lowmem_page_writable(
+- phys_to_virt(pfn << PAGE_SHIFT), feature);
+- }
+-}
+-
+-void make_pages_readonly(void *va, unsigned int nr, unsigned int feature)
+-{
+- if (xen_feature(feature))
+- return;
+-
+- while (nr-- != 0) {
+- make_page_readonly(va, feature);
+- va = (void *)((unsigned long)va + PAGE_SIZE);
+- }
+-}
+-
+-void make_pages_writable(void *va, unsigned int nr, unsigned int feature)
+-{
+- if (xen_feature(feature))
+- return;
+-
+- while (nr-- != 0) {
+- make_page_writable(va, feature);
+- va = (void *)((unsigned long)va + PAGE_SIZE);
+- }
+-}
+-
+-static void _pin_lock(struct mm_struct *mm, int lock) {
+- if (lock)
+- spin_lock(&mm->page_table_lock);
+-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+- /* While mm->page_table_lock protects us against insertions and
+- * removals of higher level page table pages, it doesn't protect
+- * against updates of pte-s. Such updates, however, require the
+- * pte pages to be in consistent state (unpinned+writable or
+- * pinned+readonly). The pinning and attribute changes, however
+- * cannot be done atomically, which is why such updates must be
+- * prevented from happening concurrently.
+- * Note that no pte lock can ever elsewhere be acquired nesting
+- * with an already acquired one in the same mm, or with the mm's
+- * page_table_lock already acquired, as that would break in the
+- * non-split case (where all these are actually resolving to the
+- * one page_table_lock). Thus acquiring all of them here is not
+- * going to result in dead locks, and the order of acquires
+- * doesn't matter.
+- */
+- {
+- pgd_t *pgd = mm->pgd;
+- unsigned g;
+-
+- for (g = 0; g < USER_PTRS_PER_PGD; g++, pgd++) {
+- pud_t *pud;
+- unsigned u;
+-
+- if (pgd_none(*pgd))
+- continue;
+- pud = pud_offset(pgd, 0);
+- for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
+- pmd_t *pmd;
+- unsigned m;
+-
+- if (pud_none(*pud))
+- continue;
+- pmd = pmd_offset(pud, 0);
+- for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
+- spinlock_t *ptl;
+-
+- if (pmd_none(*pmd))
+- continue;
+- ptl = pte_lockptr(0, pmd);
+- if (lock)
+- spin_lock(ptl);
+- else
+- spin_unlock(ptl);
+- }
+- }
+- }
+- }
+-#endif
+- if (!lock)
+- spin_unlock(&mm->page_table_lock);
+-}
+-#define pin_lock(mm) _pin_lock(mm, 1)
+-#define pin_unlock(mm) _pin_lock(mm, 0)
+-
+-#define PIN_BATCH 4
+-static DEFINE_PER_CPU(multicall_entry_t[PIN_BATCH], pb_mcl);
+-
+-static inline unsigned int pgd_walk_set_prot(struct page *page, pgprot_t flags,
+- unsigned int cpu, unsigned seq)
+-{
+- unsigned long pfn = page_to_pfn(page);
+-
+- if (PageHighMem(page)) {
+- if (pgprot_val(flags) & _PAGE_RW)
+- ClearPagePinned(page);
+- else
+- SetPagePinned(page);
+- } else {
+- MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
+- (unsigned long)__va(pfn << PAGE_SHIFT),
+- pfn_pte(pfn, flags), 0);
+- if (unlikely(++seq == PIN_BATCH)) {
+- if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
+- PIN_BATCH, NULL)))
+- BUG();
+- seq = 0;
+- }
+- }
+-
+- return seq;
+-}
+-
+-static void pgd_walk(pgd_t *pgd_base, pgprot_t flags)
+-{
+- pgd_t *pgd = pgd_base;
+- pud_t *pud;
+- pmd_t *pmd;
+- int g, u, m;
+- unsigned int cpu, seq;
+-
+- if (xen_feature(XENFEAT_auto_translated_physmap))
+- return;
+-
+- cpu = get_cpu();
+-
+- for (g = 0, seq = 0; g < USER_PTRS_PER_PGD; g++, pgd++) {
+- if (pgd_none(*pgd))
+- continue;
+- pud = pud_offset(pgd, 0);
+- if (PTRS_PER_PUD > 1) /* not folded */
+- seq = pgd_walk_set_prot(virt_to_page(pud),flags,cpu,seq);
+- for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
+- if (pud_none(*pud))
+- continue;
+- pmd = pmd_offset(pud, 0);
+- if (PTRS_PER_PMD > 1) /* not folded */
+- seq = pgd_walk_set_prot(virt_to_page(pmd),flags,cpu,seq);
+- for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
+- if (pmd_none(*pmd))
+- continue;
+- seq = pgd_walk_set_prot(pmd_page(*pmd),flags,cpu,seq);
+- }
+- }
+- }
+-
+- if (likely(seq != 0)) {
+- MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
+- (unsigned long)pgd_base,
+- pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
+- UVMF_TLB_FLUSH);
+- if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
+- seq + 1, NULL)))
+- BUG();
+- } else if(HYPERVISOR_update_va_mapping((unsigned long)pgd_base,
+- pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
+- UVMF_TLB_FLUSH))
+- BUG();
+-
+- put_cpu();
+-}
+-
+-static void __pgd_pin(pgd_t *pgd)
+-{
+- pgd_walk(pgd, PAGE_KERNEL_RO);
+- kmap_flush_unused();
+- xen_pgd_pin(__pa(pgd));
+- SetPagePinned(virt_to_page(pgd));
+-}
+-
+-static void __pgd_unpin(pgd_t *pgd)
+-{
+- xen_pgd_unpin(__pa(pgd));
+- pgd_walk(pgd, PAGE_KERNEL);
+- ClearPagePinned(virt_to_page(pgd));
+-}
+-
+-static void pgd_test_and_unpin(pgd_t *pgd)
+-{
+- if (PagePinned(virt_to_page(pgd)))
+- __pgd_unpin(pgd);
+-}
+-
+-void mm_pin(struct mm_struct *mm)
+-{
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+- pin_lock(mm);
+- __pgd_pin(mm->pgd);
+- pin_unlock(mm);
+-}
+-
+-void mm_unpin(struct mm_struct *mm)
+-{
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+- pin_lock(mm);
+- __pgd_unpin(mm->pgd);
+- pin_unlock(mm);
+-}
+-
+-void mm_pin_all(void)
+-{
+- struct page *page;
+- unsigned long flags;
+-
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+-
+- /*
+- * Allow uninterrupted access to the pgd_list. Also protects
+- * __pgd_pin() by disabling preemption.
+- * All other CPUs must be at a safe point (e.g., in stop_machine
+- * or offlined entirely).
+- */
+- spin_lock_irqsave(&pgd_lock, flags);
+- for (page = pgd_list; page; page = (struct page *)page->index) {
+- if (!PagePinned(page))
+- __pgd_pin((pgd_t *)page_address(page));
+- }
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-}
+-
+-void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+-{
+- if (!PagePinned(virt_to_page(mm->pgd)))
+- mm_pin(mm);
+-}
+-
+-void arch_exit_mmap(struct mm_struct *mm)
+-{
+- struct task_struct *tsk = current;
+-
+- task_lock(tsk);
+-
+- /*
+- * We aggressively remove defunct pgd from cr3. We execute unmap_vmas()
+- * *much* faster this way, as no tlb flushes means bigger wrpt batches.
+- */
+- if (tsk->active_mm == mm) {
+- tsk->active_mm = &init_mm;
+- atomic_inc(&init_mm.mm_count);
+-
+- switch_mm(mm, &init_mm, tsk);
+-
+- atomic_dec(&mm->mm_count);
+- BUG_ON(atomic_read(&mm->mm_count) == 0);
+- }
+-
+- task_unlock(tsk);
+-
+- if (PagePinned(virt_to_page(mm->pgd)) &&
+- (atomic_read(&mm->mm_count) == 1) &&
+- !mm->context.has_foreign_mappings)
+- mm_unpin(mm);
+-}
+--- a/arch/x86/pci/irq-xen.c
++++ b/arch/x86/pci/irq-xen.c
+@@ -204,6 +204,7 @@ static int pirq_ali_get(struct pci_dev *
+ {
+ static const unsigned char irqmap[16] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 };
+
++ WARN_ON_ONCE(pirq >= 16);
+ return irqmap[read_config_nybble(router, 0x48, pirq-1)];
+ }
+
+@@ -211,7 +212,8 @@ static int pirq_ali_set(struct pci_dev *
+ {
+ static const unsigned char irqmap[16] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 };
+ unsigned int val = irqmap[irq];
+-
++
++ WARN_ON_ONCE(pirq >= 16);
+ if (val) {
+ write_config_nybble(router, 0x48, pirq-1, val);
+ return 1;
+@@ -261,12 +263,16 @@ static int pirq_via_set(struct pci_dev *
+ static int pirq_via586_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+ {
+ static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 };
++
++ WARN_ON_ONCE(pirq >= 5);
+ return read_config_nybble(router, 0x55, pirqmap[pirq-1]);
+ }
+
+ static int pirq_via586_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+ {
+ static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 };
++
++ WARN_ON_ONCE(pirq >= 5);
+ write_config_nybble(router, 0x55, pirqmap[pirq-1], irq);
+ return 1;
+ }
+@@ -279,12 +285,16 @@ static int pirq_via586_set(struct pci_de
+ static int pirq_ite_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+ {
+ static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
++
++ WARN_ON_ONCE(pirq >= 4);
+ return read_config_nybble(router,0x43, pirqmap[pirq-1]);
+ }
+
+ static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+ {
+ static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
++
++ WARN_ON_ONCE(pirq >= 4);
+ write_config_nybble(router, 0x43, pirqmap[pirq-1], irq);
+ return 1;
+ }
+@@ -423,6 +433,7 @@ static int pirq_sis_set(struct pci_dev *
+
+ static int pirq_vlsi_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+ {
++ WARN_ON_ONCE(pirq >= 9);
+ if (pirq > 8) {
+ printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq);
+ return 0;
+@@ -432,6 +443,7 @@ static int pirq_vlsi_get(struct pci_dev
+
+ static int pirq_vlsi_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+ {
++ WARN_ON_ONCE(pirq >= 9);
+ if (pirq > 8) {
+ printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq);
+ return 0;
+@@ -453,14 +465,14 @@ static int pirq_vlsi_set(struct pci_dev
+ */
+ static int pirq_serverworks_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+ {
+- outb_p(pirq, 0xc00);
++ outb(pirq, 0xc00);
+ return inb(0xc01) & 0xf;
+ }
+
+ static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+ {
+- outb_p(pirq, 0xc00);
+- outb_p(irq, 0xc01);
++ outb(pirq, 0xc00);
++ outb(irq, 0xc01);
+ return 1;
+ }
+
+@@ -575,6 +587,10 @@ static __init int intel_router_probe(str
+ case PCI_DEVICE_ID_INTEL_ICH9_4:
+ case PCI_DEVICE_ID_INTEL_ICH9_5:
+ case PCI_DEVICE_ID_INTEL_TOLAPAI_0:
++ case PCI_DEVICE_ID_INTEL_ICH10_0:
++ case PCI_DEVICE_ID_INTEL_ICH10_1:
++ case PCI_DEVICE_ID_INTEL_ICH10_2:
++ case PCI_DEVICE_ID_INTEL_ICH10_3:
+ r->name = "PIIX/ICH";
+ r->get = pirq_piix_get;
+ r->set = pirq_piix_set;
+--- a/arch/x86/vdso/Makefile
++++ b/arch/x86/vdso/Makefile
+@@ -66,6 +66,7 @@ vdso32.so-$(VDSO32-y) += int80
+ vdso32.so-$(CONFIG_COMPAT) += syscall
+ vdso32.so-$(VDSO32-y) += sysenter
+ xen-vdso32-$(subst 1,$(CONFIG_COMPAT),$(shell expr $(CONFIG_XEN_COMPAT)0 '<' 0x0302000)) += int80
++xen-vdso32-$(CONFIG_X86_32) += syscall
+ vdso32.so-$(CONFIG_XEN) += $(xen-vdso32-y)
+
+ vdso32-images = $(vdso32.so-y:%=vdso32-%.so)
+--- a/arch/x86/vdso/vdso32.S
++++ b/arch/x86/vdso/vdso32.S
+@@ -19,4 +19,16 @@ vdso32_sysenter_start:
+ .incbin "arch/x86/vdso/vdso32-sysenter.so"
+ vdso32_sysenter_end:
+
++#if defined(CONFIG_X86_64_XEN) && CONFIG_XEN_COMPAT < 0x030200
++ .globl vdso32_int80_start, vdso32_int80_end
++vdso32_int80_start:
++ .incbin "arch/x86/vdso/vdso32-int80.so"
++vdso32_int80_end:
++#elif defined(CONFIG_X86_XEN)
++ .globl vdso32_syscall_start, vdso32_syscall_end
++vdso32_syscall_start:
++ .incbin "arch/x86/vdso/vdso32-syscall.so"
++vdso32_syscall_end:
++#endif
++
+ __FINIT
+--- a/arch/x86/vdso/vdso32-setup.c
++++ b/arch/x86/vdso/vdso32-setup.c
+@@ -26,10 +26,6 @@
+ #include <asm/vdso.h>
+ #include <asm/proto.h>
+
+-#ifdef CONFIG_XEN
+-#include <xen/interface/callback.h>
+-#endif
+-
+ enum {
+ VDSO_DISABLED = 0,
+ VDSO_ENABLED = 1,
+@@ -229,7 +225,6 @@ static inline void map_compat_vdso(int m
+
+ void enable_sep_cpu(void)
+ {
+-#ifndef CONFIG_XEN
+ int cpu = get_cpu();
+ struct tss_struct *tss = &per_cpu(init_tss, cpu);
+
+@@ -244,35 +239,6 @@ void enable_sep_cpu(void)
+ wrmsr(MSR_IA32_SYSENTER_ESP, tss->x86_tss.sp1, 0);
+ wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long) ia32_sysenter_target, 0);
+ put_cpu();
+-#else
+- extern asmlinkage void ia32pv_sysenter_target(void);
+- static struct callback_register sysenter = {
+- .type = CALLBACKTYPE_sysenter,
+- .address = { __KERNEL_CS, (unsigned long)ia32pv_sysenter_target },
+- };
+-
+- if (!boot_cpu_has(X86_FEATURE_SEP))
+- return;
+-
+- get_cpu();
+-
+- if (xen_feature(XENFEAT_supervisor_mode_kernel))
+- sysenter.address.eip = (unsigned long)ia32_sysenter_target;
+-
+- switch (HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter)) {
+- case 0:
+- break;
+-#if CONFIG_XEN_COMPAT < 0x030200
+- case -ENOSYS:
+- sysenter.type = CALLBACKTYPE_sysenter_deprecated;
+- if (HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter) == 0)
+- break;
+-#endif
+- default:
+- clear_bit(X86_FEATURE_SEP, boot_cpu_data.x86_capability);
+- break;
+- }
+-#endif
+ }
+
+ static struct vm_area_struct gate_vma;
+--- /dev/null
++++ b/arch/x86/vdso/vdso32-setup-xen.c
+@@ -0,0 +1,506 @@
++/*
++ * (C) Copyright 2002 Linus Torvalds
++ * Portions based on the vdso-randomization code from exec-shield:
++ * Copyright(C) 2005-2006, Red Hat, Inc., Ingo Molnar
++ *
++ * This file contains the needed initializations to support sysenter.
++ */
++
++#include <linux/init.h>
++#include <linux/smp.h>
++#include <linux/thread_info.h>
++#include <linux/sched.h>
++#include <linux/gfp.h>
++#include <linux/string.h>
++#include <linux/elf.h>
++#include <linux/mm.h>
++#include <linux/err.h>
++#include <linux/module.h>
++
++#include <asm/cpufeature.h>
++#include <asm/msr.h>
++#include <asm/pgtable.h>
++#include <asm/unistd.h>
++#include <asm/elf.h>
++#include <asm/tlbflush.h>
++#include <asm/vdso.h>
++#include <asm/proto.h>
++
++#include <xen/interface/callback.h>
++
++enum {
++ VDSO_DISABLED = 0,
++ VDSO_ENABLED = 1,
++ VDSO_COMPAT = 2,
++};
++
++#ifdef CONFIG_COMPAT_VDSO
++#define VDSO_DEFAULT VDSO_COMPAT
++#else
++#define VDSO_DEFAULT VDSO_ENABLED
++#endif
++
++#ifdef CONFIG_X86_64
++#define vdso_enabled sysctl_vsyscall32
++#define arch_setup_additional_pages syscall32_setup_pages
++#endif
++
++/*
++ * This is the difference between the prelinked addresses in the vDSO images
++ * and the VDSO_HIGH_BASE address where CONFIG_COMPAT_VDSO places the vDSO
++ * in the user address space.
++ */
++#define VDSO_ADDR_ADJUST (VDSO_HIGH_BASE - (unsigned long)VDSO32_PRELINK)
++
++/*
++ * Should the kernel map a VDSO page into processes and pass its
++ * address down to glibc upon exec()?
++ */
++unsigned int __read_mostly vdso_enabled = VDSO_DEFAULT;
++
++static int __init vdso_setup(char *s)
++{
++ vdso_enabled = simple_strtoul(s, NULL, 0);
++
++ return 1;
++}
++
++/*
++ * For consistency, the argument vdso32=[012] affects the 32-bit vDSO
++ * behavior on both 64-bit and 32-bit kernels.
++ * On 32-bit kernels, vdso=[012] means the same thing.
++ */
++__setup("vdso32=", vdso_setup);
++
++#ifdef CONFIG_X86_32
++__setup_param("vdso=", vdso32_setup, vdso_setup, 0);
++
++EXPORT_SYMBOL_GPL(vdso_enabled);
++#endif
++
++static __init void reloc_symtab(Elf32_Ehdr *ehdr,
++ unsigned offset, unsigned size)
++{
++ Elf32_Sym *sym = (void *)ehdr + offset;
++ unsigned nsym = size / sizeof(*sym);
++ unsigned i;
++
++ for(i = 0; i < nsym; i++, sym++) {
++ if (sym->st_shndx == SHN_UNDEF ||
++ sym->st_shndx == SHN_ABS)
++ continue; /* skip */
++
++ if (sym->st_shndx > SHN_LORESERVE) {
++ printk(KERN_INFO "VDSO: unexpected st_shndx %x\n",
++ sym->st_shndx);
++ continue;
++ }
++
++ switch(ELF_ST_TYPE(sym->st_info)) {
++ case STT_OBJECT:
++ case STT_FUNC:
++ case STT_SECTION:
++ case STT_FILE:
++ sym->st_value += VDSO_ADDR_ADJUST;
++ }
++ }
++}
++
++static __init void reloc_dyn(Elf32_Ehdr *ehdr, unsigned offset)
++{
++ Elf32_Dyn *dyn = (void *)ehdr + offset;
++
++ for(; dyn->d_tag != DT_NULL; dyn++)
++ switch(dyn->d_tag) {
++ case DT_PLTGOT:
++ case DT_HASH:
++ case DT_STRTAB:
++ case DT_SYMTAB:
++ case DT_RELA:
++ case DT_INIT:
++ case DT_FINI:
++ case DT_REL:
++ case DT_DEBUG:
++ case DT_JMPREL:
++ case DT_VERSYM:
++ case DT_VERDEF:
++ case DT_VERNEED:
++ case DT_ADDRRNGLO ... DT_ADDRRNGHI:
++ /* definitely pointers needing relocation */
++ dyn->d_un.d_ptr += VDSO_ADDR_ADJUST;
++ break;
++
++ case DT_ENCODING ... OLD_DT_LOOS-1:
++ case DT_LOOS ... DT_HIOS-1:
++ /* Tags above DT_ENCODING are pointers if
++ they're even */
++ if (dyn->d_tag >= DT_ENCODING &&
++ (dyn->d_tag & 1) == 0)
++ dyn->d_un.d_ptr += VDSO_ADDR_ADJUST;
++ break;
++
++ case DT_VERDEFNUM:
++ case DT_VERNEEDNUM:
++ case DT_FLAGS_1:
++ case DT_RELACOUNT:
++ case DT_RELCOUNT:
++ case DT_VALRNGLO ... DT_VALRNGHI:
++ /* definitely not pointers */
++ break;
++
++ case OLD_DT_LOOS ... DT_LOOS-1:
++ case DT_HIOS ... DT_VALRNGLO-1:
++ default:
++ if (dyn->d_tag > DT_ENCODING)
++ printk(KERN_INFO "VDSO: unexpected DT_tag %x\n",
++ dyn->d_tag);
++ break;
++ }
++}
++
++static __init void relocate_vdso(Elf32_Ehdr *ehdr)
++{
++ Elf32_Phdr *phdr;
++ Elf32_Shdr *shdr;
++ int i;
++
++ BUG_ON(memcmp(ehdr->e_ident, ELFMAG, 4) != 0 ||
++ !elf_check_arch_ia32(ehdr) ||
++ ehdr->e_type != ET_DYN);
++
++ ehdr->e_entry += VDSO_ADDR_ADJUST;
++
++ /* rebase phdrs */
++ phdr = (void *)ehdr + ehdr->e_phoff;
++ for (i = 0; i < ehdr->e_phnum; i++) {
++ phdr[i].p_vaddr += VDSO_ADDR_ADJUST;
++
++ /* relocate dynamic stuff */
++ if (phdr[i].p_type == PT_DYNAMIC)
++ reloc_dyn(ehdr, phdr[i].p_offset);
++ }
++
++ /* rebase sections */
++ shdr = (void *)ehdr + ehdr->e_shoff;
++ for(i = 0; i < ehdr->e_shnum; i++) {
++ if (!(shdr[i].sh_flags & SHF_ALLOC))
++ continue;
++
++ shdr[i].sh_addr += VDSO_ADDR_ADJUST;
++
++ if (shdr[i].sh_type == SHT_SYMTAB ||
++ shdr[i].sh_type == SHT_DYNSYM)
++ reloc_symtab(ehdr, shdr[i].sh_offset,
++ shdr[i].sh_size);
++ }
++}
++
++/*
++ * These symbols are defined by vdso32.S to mark the bounds
++ * of the ELF DSO images included therein.
++ */
++extern const char vdso32_default_start, vdso32_default_end;
++extern const char vdso32_sysenter_start, vdso32_sysenter_end;
++static struct page *vdso32_pages[1];
++
++#ifdef CONFIG_X86_64
++
++#if CONFIG_XEN_COMPAT < 0x030200
++static int use_int80 = 1;
++#endif
++static int use_sysenter __read_mostly = -1;
++
++#define vdso32_sysenter() (use_sysenter > 0)
++
++/* May not be __init: called during resume */
++void syscall32_cpu_init(void)
++{
++ static const struct callback_register cstar = {
++ .type = CALLBACKTYPE_syscall32,
++ .address = (unsigned long)ia32_cstar_target
++ };
++ static const struct callback_register sysenter = {
++ .type = CALLBACKTYPE_sysenter,
++ .address = (unsigned long)ia32_sysenter_target
++ };
++
++ if ((HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter) < 0) ||
++ (HYPERVISOR_callback_op(CALLBACKOP_register, &cstar) < 0))
++#if CONFIG_XEN_COMPAT < 0x030200
++ return;
++ use_int80 = 0;
++#else
++ BUG();
++#endif
++
++ if (use_sysenter < 0)
++ use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL);
++}
++
++#define compat_uses_vma 1
++
++static inline void map_compat_vdso(int map)
++{
++}
++
++#else /* CONFIG_X86_32 */
++
++#define vdso32_sysenter() (boot_cpu_has(X86_FEATURE_SEP))
++
++extern asmlinkage void ia32pv_cstar_target(void);
++static /*const*/ struct callback_register __cpuinitdata cstar = {
++ .type = CALLBACKTYPE_syscall32,
++ .address = { __KERNEL_CS, (unsigned long)ia32pv_cstar_target },
++};
++
++void __cpuinit enable_sep_cpu(void)
++{
++ extern asmlinkage void ia32pv_sysenter_target(void);
++ static struct callback_register __cpuinitdata sysenter = {
++ .type = CALLBACKTYPE_sysenter,
++ .address = { __KERNEL_CS, (unsigned long)ia32pv_sysenter_target },
++ };
++
++ if (boot_cpu_has(X86_FEATURE_SYSCALL)) {
++ if (HYPERVISOR_callback_op(CALLBACKOP_register, &cstar) != 0)
++ BUG();
++ return;
++ }
++
++ if (!boot_cpu_has(X86_FEATURE_SEP))
++ return;
++
++ if (xen_feature(XENFEAT_supervisor_mode_kernel))
++ sysenter.address.eip = (unsigned long)ia32_sysenter_target;
++
++ switch (HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter)) {
++ case 0:
++ break;
++#if CONFIG_XEN_COMPAT < 0x030200
++ case -ENOSYS:
++ sysenter.type = CALLBACKTYPE_sysenter_deprecated;
++ if (HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter) == 0)
++ break;
++#endif
++ default:
++ setup_clear_cpu_cap(X86_FEATURE_SEP);
++ break;
++ }
++}
++
++static struct vm_area_struct gate_vma;
++
++static int __init gate_vma_init(void)
++{
++ gate_vma.vm_mm = NULL;
++ gate_vma.vm_start = FIXADDR_USER_START;
++ gate_vma.vm_end = FIXADDR_USER_END;
++ gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC;
++ gate_vma.vm_page_prot = __P101;
++ /*
++ * Make sure the vDSO gets into every core dump.
++ * Dumping its contents makes post-mortem fully interpretable later
++ * without matching up the same kernel and hardware config to see
++ * what PC values meant.
++ */
++ gate_vma.vm_flags |= VM_ALWAYSDUMP;
++ return 0;
++}
++
++#define compat_uses_vma 0
++
++static void map_compat_vdso(int map)
++{
++ static int vdso_mapped;
++
++ if (map == vdso_mapped)
++ return;
++
++ vdso_mapped = map;
++
++ __set_fixmap(FIX_VDSO, page_to_pfn(vdso32_pages[0]) << PAGE_SHIFT,
++ map ? PAGE_READONLY_EXEC : PAGE_NONE);
++
++ /* flush stray tlbs */
++ flush_tlb_all();
++}
++
++#endif /* CONFIG_X86_64 */
++
++int __init sysenter_setup(void)
++{
++ void *syscall_page = (void *)get_zeroed_page(GFP_ATOMIC);
++ const void *vsyscall;
++ size_t vsyscall_len;
++
++ vdso32_pages[0] = virt_to_page(syscall_page);
++
++#ifdef CONFIG_X86_32
++ gate_vma_init();
++
++ printk("Compat vDSO mapped to %08lx.\n", __fix_to_virt(FIX_VDSO));
++#endif
++
++#if defined(CONFIG_X86_64) && CONFIG_XEN_COMPAT < 0x030200
++ if (use_int80) {
++ extern const char vdso32_int80_start, vdso32_int80_end;
++
++ vsyscall = &vdso32_int80_start;
++ vsyscall_len = &vdso32_int80_end - &vdso32_int80_start;
++ } else
++#elif defined(CONFIG_X86_32)
++ if (boot_cpu_has(X86_FEATURE_SYSCALL)
++ && (boot_cpu_data.x86_vendor != X86_VENDOR_AMD
++ || HYPERVISOR_callback_op(CALLBACKOP_register, &cstar) != 0))
++ setup_clear_cpu_cap(X86_FEATURE_SYSCALL);
++ barrier(); /* until clear_bit()'s constraints are correct ... */
++ if (boot_cpu_has(X86_FEATURE_SYSCALL)) {
++ extern const char vdso32_syscall_start, vdso32_syscall_end;
++
++ vsyscall = &vdso32_syscall_start;
++ vsyscall_len = &vdso32_syscall_end - &vdso32_syscall_start;
++ } else
++#endif
++ if (!vdso32_sysenter()) {
++ vsyscall = &vdso32_default_start;
++ vsyscall_len = &vdso32_default_end - &vdso32_default_start;
++ } else {
++ vsyscall = &vdso32_sysenter_start;
++ vsyscall_len = &vdso32_sysenter_end - &vdso32_sysenter_start;
++ }
++
++ memcpy(syscall_page, vsyscall, vsyscall_len);
++ relocate_vdso(syscall_page);
++
++ return 0;
++}
++
++/* Setup a VMA at program startup for the vsyscall page */
++int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
++{
++ struct mm_struct *mm = current->mm;
++ unsigned long addr;
++ int ret = 0;
++ bool compat;
++
++ down_write(&mm->mmap_sem);
++
++ /* Test compat mode once here, in case someone
++ changes it via sysctl */
++ compat = (vdso_enabled == VDSO_COMPAT);
++
++ map_compat_vdso(compat);
++
++ if (compat)
++ addr = VDSO_HIGH_BASE;
++ else {
++ addr = get_unmapped_area(NULL, 0, PAGE_SIZE, 0, 0);
++ if (IS_ERR_VALUE(addr)) {
++ ret = addr;
++ goto up_fail;
++ }
++ }
++
++ if (compat_uses_vma || !compat) {
++ /*
++ * MAYWRITE to allow gdb to COW and set breakpoints
++ *
++ * Make sure the vDSO gets into every core dump.
++ * Dumping its contents makes post-mortem fully
++ * interpretable later without matching up the same
++ * kernel and hardware config to see what PC values
++ * meant.
++ */
++ ret = install_special_mapping(mm, addr, PAGE_SIZE,
++ VM_READ|VM_EXEC|
++ VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
++ VM_ALWAYSDUMP,
++ vdso32_pages);
++
++ if (ret)
++ goto up_fail;
++ }
++
++ current->mm->context.vdso = (void *)addr;
++ current_thread_info()->sysenter_return =
++ VDSO32_SYMBOL(addr, SYSENTER_RETURN);
++
++ up_fail:
++ up_write(&mm->mmap_sem);
++
++ return ret;
++}
++
++#ifdef CONFIG_X86_64
++
++/*
++ * This must be done early in case we have an initrd containing 32-bit
++ * binaries (e.g., hotplug). This could be pushed upstream.
++ */
++core_initcall(sysenter_setup);
++
++#ifdef CONFIG_SYSCTL
++/* Register vsyscall32 into the ABI table */
++#include <linux/sysctl.h>
++
++static ctl_table abi_table2[] = {
++ {
++ .procname = "vsyscall32",
++ .data = &sysctl_vsyscall32,
++ .maxlen = sizeof(int),
++ .mode = 0644,
++ .proc_handler = proc_dointvec
++ },
++ {}
++};
++
++static ctl_table abi_root_table2[] = {
++ {
++ .ctl_name = CTL_ABI,
++ .procname = "abi",
++ .mode = 0555,
++ .child = abi_table2
++ },
++ {}
++};
++
++static __init int ia32_binfmt_init(void)
++{
++ register_sysctl_table(abi_root_table2);
++ return 0;
++}
++__initcall(ia32_binfmt_init);
++#endif
++
++#else /* CONFIG_X86_32 */
++
++const char *arch_vma_name(struct vm_area_struct *vma)
++{
++ if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso)
++ return "[vdso]";
++ return NULL;
++}
++
++struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
++{
++ struct mm_struct *mm = tsk->mm;
++
++ /* Check to see if this task was created in compat vdso mode */
++ if (mm && mm->context.vdso == (void *)VDSO_HIGH_BASE)
++ return &gate_vma;
++ return NULL;
++}
++
++int in_gate_area(struct task_struct *task, unsigned long addr)
++{
++ const struct vm_area_struct *vma = get_gate_vma(task);
++
++ return vma && addr >= vma->vm_start && addr < vma->vm_end;
++}
++
++int in_gate_area_no_task(unsigned long addr)
++{
++ return 0;
++}
++
++#endif /* CONFIG_X86_64 */
+--- a/arch/x86/vdso/vdso32/syscall.S
++++ b/arch/x86/vdso/vdso32/syscall.S
+@@ -19,8 +19,10 @@ __kernel_vsyscall:
+ .Lpush_ebp:
+ movl %ecx, %ebp
+ syscall
++#ifndef CONFIG_XEN
+ movl $__USER32_DS, %ecx
+ movl %ecx, %ss
++#endif
+ movl %ebp, %ecx
+ popl %ebp
+ .Lpop_ebp:
+--- a/drivers/pci/msi-xen.c
++++ b/drivers/pci/msi-xen.c
+@@ -43,6 +43,53 @@ struct msi_pirq_entry {
+ int entry_nr;
+ };
+
++/* Arch hooks */
++
++int __attribute__ ((weak))
++arch_msi_check_device(struct pci_dev *dev, int nvec, int type)
++{
++ return 0;
++}
++
++#ifndef CONFIG_XEN
++int __attribute__ ((weak))
++arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *entry)
++{
++ return 0;
++}
++
++int __attribute__ ((weak))
++arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
++{
++ struct msi_desc *entry;
++ int ret;
++
++ list_for_each_entry(entry, &dev->msi_list, list) {
++ ret = arch_setup_msi_irq(dev, entry);
++ if (ret)
++ return ret;
++ }
++
++ return 0;
++}
++
++void __attribute__ ((weak)) arch_teardown_msi_irq(unsigned int irq)
++{
++ return;
++}
++
++void __attribute__ ((weak))
++arch_teardown_msi_irqs(struct pci_dev *dev)
++{
++ struct msi_desc *entry;
++
++ list_for_each_entry(entry, &dev->msi_list, list) {
++ if (entry->irq != 0)
++ arch_teardown_msi_irq(entry->irq);
++ }
++}
++#endif
++
+ static void msi_set_enable(struct pci_dev *dev, int enable)
+ {
+ int pos;
+@@ -270,7 +317,6 @@ static void pci_intx_for_msi(struct pci_
+ pci_intx(dev, enable);
+ }
+
+-#ifdef CONFIG_PM
+ static void __pci_restore_msi_state(struct pci_dev *dev)
+ {
+ int pirq;
+@@ -328,7 +374,7 @@ void pci_restore_msi_state(struct pci_de
+ __pci_restore_msi_state(dev);
+ __pci_restore_msix_state(dev);
+ }
+-#endif /* CONFIG_PM */
++EXPORT_SYMBOL_GPL(pci_restore_msi_state);
+
+ /**
+ * msi_capability_init - configure device's MSI capability structure
+@@ -760,51 +806,3 @@ void pci_msi_init_pci_dev(struct pci_dev
+ INIT_LIST_HEAD(&dev->msi_list);
+ #endif
+ }
+-
+-
+-/* Arch hooks */
+-
+-int __attribute__ ((weak))
+-arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
+-{
+- return 0;
+-}
+-
+-#ifndef CONFIG_XEN
+-int __attribute__ ((weak))
+-arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *entry)
+-{
+- return 0;
+-}
+-
+-int __attribute__ ((weak))
+-arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+-{
+- struct msi_desc *entry;
+- int ret;
+-
+- list_for_each_entry(entry, &dev->msi_list, list) {
+- ret = arch_setup_msi_irq(dev, entry);
+- if (ret)
+- return ret;
+- }
+-
+- return 0;
+-}
+-
+-void __attribute__ ((weak)) arch_teardown_msi_irq(unsigned int irq)
+-{
+- return;
+-}
+-
+-void __attribute__ ((weak))
+-arch_teardown_msi_irqs(struct pci_dev *dev)
+-{
+- struct msi_desc *entry;
+-
+- list_for_each_entry(entry, &dev->msi_list, list) {
+- if (entry->irq != 0)
+- arch_teardown_msi_irq(entry->irq);
+- }
+-}
+-#endif
+--- a/drivers/pci/pci.c
++++ b/drivers/pci/pci.c
+@@ -353,7 +353,12 @@ pci_find_parent_resource(const struct pc
+ * Restore the BAR values for a given device, so as to make it
+ * accessible by its driver.
+ */
++#ifndef CONFIG_XEN
+ static void
++#else
++EXPORT_SYMBOL_GPL(pci_restore_bars);
++void
++#endif
+ pci_restore_bars(struct pci_dev *dev)
+ {
+ int i, numres;
+--- a/drivers/xen/balloon/sysfs.c
++++ b/drivers/xen/balloon/sysfs.c
+@@ -108,7 +108,7 @@ static struct attribute_group balloon_in
+ };
+
+ static struct sysdev_class balloon_sysdev_class = {
+- set_kset_name(BALLOON_CLASS_NAME),
++ .name = BALLOON_CLASS_NAME,
+ };
+
+ static struct sys_device balloon_sysdev;
+--- a/drivers/xen/blkback/blkback.c
++++ b/drivers/xen/blkback/blkback.c
+@@ -148,7 +148,7 @@ static void unplug_queue(blkif_t *blkif)
+ return;
+ if (blkif->plug->unplug_fn)
+ blkif->plug->unplug_fn(blkif->plug);
+- blk_put_queue(blkif->plug);
++ kobject_put(&blkif->plug->kobj);
+ blkif->plug = NULL;
+ }
+
+@@ -159,7 +159,8 @@ static void plug_queue(blkif_t *blkif, s
+ if (q == blkif->plug)
+ return;
+ unplug_queue(blkif);
+- blk_get_queue(q);
++ WARN_ON(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags));
++ kobject_get(&q->kobj);
+ blkif->plug = q;
+ }
+
+--- a/drivers/xen/blkfront/blkfront.c
++++ b/drivers/xen/blkfront/blkfront.c
+@@ -716,7 +716,6 @@ static irqreturn_t blkif_int(int irq, vo
+ RING_IDX i, rp;
+ unsigned long flags;
+ struct blkfront_info *info = (struct blkfront_info *)dev_id;
+- int uptodate;
+
+ spin_lock_irqsave(&blkif_io_lock, flags);
+
+@@ -741,13 +740,13 @@ static irqreturn_t blkif_int(int irq, vo
+
+ ADD_ID_TO_FREELIST(info, id);
+
+- uptodate = (bret->status == BLKIF_RSP_OKAY);
++ ret = bret->status == BLKIF_RSP_OKAY ? 0 : -EIO;
+ switch (bret->operation) {
+ case BLKIF_OP_WRITE_BARRIER:
+ if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
+ printk("blkfront: %s: write barrier op failed\n",
+ info->gd->disk_name);
+- uptodate = -EOPNOTSUPP;
++ ret = -EOPNOTSUPP;
+ info->feature_barrier = 0;
+ xlvbd_barrier(info);
+ }
+@@ -758,10 +757,8 @@ static irqreturn_t blkif_int(int irq, vo
+ DPRINTK("Bad return from blkdev data "
+ "request: %x\n", bret->status);
+
+- ret = end_that_request_first(req, uptodate,
+- req->hard_nr_sectors);
++ ret = __blk_end_request(req, ret, blk_rq_bytes(req));
+ BUG_ON(ret);
+- end_that_request_last(req, uptodate);
+ break;
+ default:
+ BUG();
+--- a/drivers/xen/blktap/blktap.c
++++ b/drivers/xen/blktap/blktap.c
+@@ -327,8 +327,8 @@ static pte_t blktap_clear_pte(struct vm_
+ * if vm_file is NULL (meaning mmap failed and we have nothing to do)
+ */
+ if (uvaddr < uvstart || vma->vm_file == NULL)
+- return ptep_get_and_clear_full(vma->vm_mm, uvaddr,
+- ptep, is_fullmm);
++ return xen_ptep_get_and_clear_full(vma, uvaddr, ptep,
++ is_fullmm);
+
+ info = vma->vm_file->private_data;
+ map = vma->vm_private_data;
+@@ -375,8 +375,8 @@ static pte_t blktap_clear_pte(struct vm_
+ BUG_ON(!xen_feature(XENFEAT_auto_translated_physmap));
+
+ /* USING SHADOW PAGE TABLES. */
+- copy = ptep_get_and_clear_full(vma->vm_mm, uvaddr, ptep,
+- is_fullmm);
++ copy = xen_ptep_get_and_clear_full(vma, uvaddr, ptep,
++ is_fullmm);
+ }
+
+ if (count) {
+--- a/drivers/xen/core/evtchn.c
++++ b/drivers/xen/core/evtchn.c
+@@ -193,7 +193,7 @@ static inline unsigned int cpu_from_evtc
+
+ /* Upcall to generic IRQ layer. */
+ #ifdef CONFIG_X86
+-extern fastcall unsigned int do_IRQ(struct pt_regs *regs);
++extern unsigned int do_IRQ(struct pt_regs *regs);
+ void __init xen_init_IRQ(void);
+ void __init init_IRQ(void)
+ {
+@@ -202,13 +202,11 @@ void __init init_IRQ(void)
+ }
+ #if defined (__i386__)
+ static inline void exit_idle(void) {}
+-#define IRQ_REG orig_eax
+ #elif defined (__x86_64__)
+ #include <asm/idle.h>
+-#define IRQ_REG orig_rax
+ #endif
+ #define do_IRQ(irq, regs) do { \
+- (regs)->IRQ_REG = ~(irq); \
++ (regs)->orig_ax = ~(irq); \
+ do_IRQ((regs)); \
+ } while (0)
+ #endif
+@@ -669,13 +667,12 @@ static void set_affinity_irq(unsigned in
+ int resend_irq_on_evtchn(unsigned int irq)
+ {
+ int masked, evtchn = evtchn_from_irq(irq);
+- shared_info_t *s = HYPERVISOR_shared_info;
+
+ if (!VALID_EVTCHN(evtchn))
+ return 1;
+
+ masked = test_and_set_evtchn_mask(evtchn);
+- synch_set_bit(evtchn, s->evtchn_pending);
++ set_evtchn(evtchn);
+ if (!masked)
+ unmask_evtchn(evtchn);
+
+@@ -968,6 +965,43 @@ void disable_all_local_evtchn(void)
+ synch_set_bit(i, &s->evtchn_mask[0]);
+ }
+
++/* Clear an irq's pending state, in preparation for polling on it. */
++void xen_clear_irq_pending(int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ clear_evtchn(evtchn);
++}
++
++/* Set an irq's pending state, to avoid blocking on it. */
++void xen_set_irq_pending(int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn))
++ set_evtchn(evtchn);
++}
++
++/* Test an irq's pending state. */
++int xen_test_irq_pending(int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ return VALID_EVTCHN(evtchn) && test_evtchn(evtchn);
++}
++
++/* Poll waiting for an irq to become pending. In the usual case, the
++ irq will be disabled so it won't deliver an interrupt. */
++void xen_poll_irq(int irq)
++{
++ evtchn_port_t evtchn = evtchn_from_irq(irq);
++
++ if (VALID_EVTCHN(evtchn)
++ && HYPERVISOR_poll_no_timeout(&evtchn, 1))
++ BUG();
++}
++
+ static void restore_cpu_virqs(unsigned int cpu)
+ {
+ struct evtchn_bind_virq bind_virq;
+--- a/drivers/xen/core/hypervisor_sysfs.c
++++ b/drivers/xen/core/hypervisor_sysfs.c
+@@ -50,7 +50,7 @@ static int __init hypervisor_subsys_init
+ if (!is_running_on_xen())
+ return -ENODEV;
+
+- hypervisor_subsys.kobj.ktype = &hyp_sysfs_kobj_type;
++ hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
+ return 0;
+ }
+
+--- a/drivers/xen/core/Makefile
++++ b/drivers/xen/core/Makefile
+@@ -10,5 +10,6 @@ obj-$(CONFIG_SYS_HYPERVISOR) += hypervis
+ obj-$(CONFIG_HOTPLUG_CPU) += cpu_hotplug.o
+ obj-$(CONFIG_XEN_SYSFS) += xen_sysfs.o
+ obj-$(CONFIG_XEN_SMPBOOT) += smpboot.o
++obj-$(CONFIG_X86_SMP) += spinlock.o
+ obj-$(CONFIG_KEXEC) += machine_kexec.o
+ obj-$(CONFIG_XEN_XENCOMM) += xencomm.o
+--- a/drivers/xen/core/smpboot.c
++++ b/drivers/xen/core/smpboot.c
+@@ -139,6 +139,10 @@ static int __cpuinit xen_smp_intr_init(u
+ goto fail;
+ per_cpu(callfunc_irq, cpu) = rc;
+
++ rc = xen_spinlock_init(cpu);
++ if (rc < 0)
++ goto fail;
++
+ if ((cpu != 0) && ((rc = local_setup_timer(cpu)) != 0))
+ goto fail;
+
+@@ -149,6 +153,7 @@ static int __cpuinit xen_smp_intr_init(u
+ unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
+ if (per_cpu(callfunc_irq, cpu) >= 0)
+ unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
++ xen_spinlock_cleanup(cpu);
+ return rc;
+ }
+
+@@ -160,6 +165,7 @@ static void xen_smp_intr_exit(unsigned i
+
+ unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
+ unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
++ xen_spinlock_cleanup(cpu);
+ }
+ #endif
+
+@@ -212,36 +218,25 @@ static void __cpuinit cpu_initialize_con
+ smp_trap_init(ctxt.trap_ctxt);
+
+ ctxt.ldt_ents = 0;
+- ctxt.gdt_ents = GDT_SIZE / 8;
+-
+-#ifdef __i386__
+ ctxt.gdt_frames[0] = virt_to_mfn(get_cpu_gdt_table(cpu));
++ ctxt.gdt_ents = GDT_SIZE / 8;
+
+ ctxt.user_regs.cs = __KERNEL_CS;
+- ctxt.user_regs.esp = idle->thread.esp0 - sizeof(struct pt_regs);
++ ctxt.user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
+
+ ctxt.kernel_ss = __KERNEL_DS;
+- ctxt.kernel_sp = idle->thread.esp0;
++ ctxt.kernel_sp = idle->thread.sp0;
+
+- ctxt.event_callback_cs = __KERNEL_CS;
+ ctxt.event_callback_eip = (unsigned long)hypervisor_callback;
+- ctxt.failsafe_callback_cs = __KERNEL_CS;
+ ctxt.failsafe_callback_eip = (unsigned long)failsafe_callback;
++#ifdef __i386__
++ ctxt.event_callback_cs = __KERNEL_CS;
++ ctxt.failsafe_callback_cs = __KERNEL_CS;
+
+ ctxt.ctrlreg[3] = xen_pfn_to_cr3(virt_to_mfn(swapper_pg_dir));
+
+ ctxt.user_regs.fs = __KERNEL_PERCPU;
+ #else /* __x86_64__ */
+- ctxt.gdt_frames[0] = virt_to_mfn(cpu_gdt_descr[cpu].address);
+-
+- ctxt.user_regs.cs = __KERNEL_CS;
+- ctxt.user_regs.esp = idle->thread.rsp0 - sizeof(struct pt_regs);
+-
+- ctxt.kernel_ss = __KERNEL_DS;
+- ctxt.kernel_sp = idle->thread.rsp0;
+-
+- ctxt.event_callback_eip = (unsigned long)hypervisor_callback;
+- ctxt.failsafe_callback_eip = (unsigned long)failsafe_callback;
+ ctxt.syscall_callback_eip = (unsigned long)system_call;
+
+ ctxt.ctrlreg[3] = xen_pfn_to_cr3(virt_to_mfn(init_level4_pgt));
+--- /dev/null
++++ b/drivers/xen/core/spinlock.c
+@@ -0,0 +1,161 @@
++/*
++ * Xen spinlock functions
++ *
++ * See arch/x86/xen/smp.c for copyright and credits for derived
++ * portions of this file.
++ */
++
++#include <linux/init.h>
++#include <linux/irq.h>
++#include <linux/kernel.h>
++#include <linux/kernel_stat.h>
++#include <linux/module.h>
++#include <xen/evtchn.h>
++
++extern irqreturn_t smp_reschedule_interrupt(int, void *);
++
++static DEFINE_PER_CPU(int, spinlock_irq) = -1;
++static char spinlock_name[NR_CPUS][15];
++
++struct spinning {
++ raw_spinlock_t *lock;
++ unsigned int ticket;
++ struct spinning *prev;
++};
++static DEFINE_PER_CPU(struct spinning *, spinning);
++/*
++ * Protect removal of objects: Addition can be done lockless, and even
++ * removal itself doesn't need protection - what needs to be prevented is
++ * removed objects going out of scope (as they're allocated on the stack.
++ */
++static DEFINE_PER_CPU(raw_rwlock_t, spinning_rm_lock) = __RAW_RW_LOCK_UNLOCKED;
++
++int __cpuinit xen_spinlock_init(unsigned int cpu)
++{
++ int rc;
++
++ sprintf(spinlock_name[cpu], "spinlock%u", cpu);
++ rc = bind_ipi_to_irqhandler(SPIN_UNLOCK_VECTOR,
++ cpu,
++ smp_reschedule_interrupt,
++ IRQF_DISABLED|IRQF_NOBALANCING,
++ spinlock_name[cpu],
++ NULL);
++ if (rc < 0)
++ return rc;
++
++ disable_irq(rc); /* make sure it's never delivered */
++ per_cpu(spinlock_irq, cpu) = rc;
++
++ return 0;
++}
++
++void __cpuinit xen_spinlock_cleanup(unsigned int cpu)
++{
++ if (per_cpu(spinlock_irq, cpu) >= 0)
++ unbind_from_irqhandler(per_cpu(spinlock_irq, cpu), NULL);
++ per_cpu(spinlock_irq, cpu) = -1;
++}
++
++int xen_spin_wait(raw_spinlock_t *lock, unsigned int token)
++{
++ int rc = 0, irq = __get_cpu_var(spinlock_irq);
++ raw_rwlock_t *rm_lock;
++ unsigned long flags;
++ struct spinning spinning;
++
++ /* If kicker interrupt not initialized yet, just spin. */
++ if (unlikely(irq < 0))
++ return 0;
++
++ token >>= TICKET_SHIFT;
++
++ /* announce we're spinning */
++ spinning.ticket = token;
++ spinning.lock = lock;
++ spinning.prev = __get_cpu_var(spinning);
++ smp_wmb();
++ __get_cpu_var(spinning) = &spinning;
++
++ /* clear pending */
++ xen_clear_irq_pending(irq);
++
++ do {
++ /* Check again to make sure it didn't become free while
++ * we weren't looking. */
++ if ((lock->slock & ((1U << TICKET_SHIFT) - 1)) == token) {
++ /* If we interrupted another spinlock while it was
++ * blocking, make sure it doesn't block (again)
++ * without rechecking the lock. */
++ if (spinning.prev)
++ xen_set_irq_pending(irq);
++ rc = 1;
++ break;
++ }
++
++ /* block until irq becomes pending */
++ xen_poll_irq(irq);
++ } while (!xen_test_irq_pending(irq));
++
++ /* Leave the irq pending so that any interrupted blocker will
++ * re-check. */
++ kstat_this_cpu.irqs[irq] += !rc;
++
++ /* announce we're done */
++ __get_cpu_var(spinning) = spinning.prev;
++ rm_lock = &__get_cpu_var(spinning_rm_lock);
++ raw_local_irq_save(flags);
++ __raw_write_lock(rm_lock);
++ __raw_write_unlock(rm_lock);
++ raw_local_irq_restore(flags);
++
++ return rc;
++}
++EXPORT_SYMBOL(xen_spin_wait);
++
++unsigned int xen_spin_adjust(raw_spinlock_t *lock, unsigned int token)
++{
++ return token;//todo
++}
++EXPORT_SYMBOL(xen_spin_adjust);
++
++int xen_spin_wait_flags(raw_spinlock_t *lock, unsigned int *token,
++ unsigned int flags)
++{
++ return xen_spin_wait(lock, *token);//todo
++}
++EXPORT_SYMBOL(xen_spin_wait_flags);
++
++void xen_spin_kick(raw_spinlock_t *lock, unsigned int token)
++{
++ unsigned int cpu;
++
++ token &= (1U << TICKET_SHIFT) - 1;
++ for_each_online_cpu(cpu) {
++ raw_rwlock_t *rm_lock;
++ unsigned long flags;
++ struct spinning *spinning;
++
++ if (cpu == raw_smp_processor_id())
++ continue;
++
++ rm_lock = &per_cpu(spinning_rm_lock, cpu);
++ raw_local_irq_save(flags);
++ __raw_read_lock(rm_lock);
++
++ spinning = per_cpu(spinning, cpu);
++ smp_rmb();
++ if (spinning
++ && (spinning->lock != lock || spinning->ticket != token))
++ spinning = NULL;
++
++ __raw_read_unlock(rm_lock);
++ raw_local_irq_restore(flags);
++
++ if (unlikely(spinning)) {
++ notify_remote_via_irq(per_cpu(spinlock_irq, cpu));
++ return;
++ }
++ }
++}
++EXPORT_SYMBOL(xen_spin_kick);
+--- a/drivers/xen/core/xen_sysfs.c
++++ b/drivers/xen/core/xen_sysfs.c
+@@ -29,12 +29,12 @@ HYPERVISOR_ATTR_RO(type);
+
+ static int __init xen_sysfs_type_init(void)
+ {
+- return sysfs_create_file(&hypervisor_subsys.kobj, &type_attr.attr);
++ return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
+ }
+
+ static void xen_sysfs_type_destroy(void)
+ {
+- sysfs_remove_file(&hypervisor_subsys.kobj, &type_attr.attr);
++ sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
+ }
+
+ /* xen version attributes */
+@@ -90,13 +90,12 @@ static struct attribute_group version_gr
+
+ static int __init xen_sysfs_version_init(void)
+ {
+- return sysfs_create_group(&hypervisor_subsys.kobj,
+- &version_group);
++ return sysfs_create_group(hypervisor_kobj, &version_group);
+ }
+
+ static void xen_sysfs_version_destroy(void)
+ {
+- sysfs_remove_group(&hypervisor_subsys.kobj, &version_group);
++ sysfs_remove_group(hypervisor_kobj, &version_group);
+ }
+
+ /* UUID */
+@@ -126,12 +125,12 @@ HYPERVISOR_ATTR_RO(uuid);
+
+ static int __init xen_sysfs_uuid_init(void)
+ {
+- return sysfs_create_file(&hypervisor_subsys.kobj, &uuid_attr.attr);
++ return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
+ }
+
+ static void xen_sysfs_uuid_destroy(void)
+ {
+- sysfs_remove_file(&hypervisor_subsys.kobj, &uuid_attr.attr);
++ sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
+ }
+
+ /* xen compilation attributes */
+@@ -204,14 +203,12 @@ static struct attribute_group xen_compil
+
+ int __init static xen_compilation_init(void)
+ {
+- return sysfs_create_group(&hypervisor_subsys.kobj,
+- &xen_compilation_group);
++ return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
+ }
+
+ static void xen_compilation_destroy(void)
+ {
+- sysfs_remove_group(&hypervisor_subsys.kobj,
+- &xen_compilation_group);
++ sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
+ }
+
+ /* xen properties info */
+@@ -325,14 +322,12 @@ static struct attribute_group xen_proper
+
+ static int __init xen_properties_init(void)
+ {
+- return sysfs_create_group(&hypervisor_subsys.kobj,
+- &xen_properties_group);
++ return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
+ }
+
+ static void xen_properties_destroy(void)
+ {
+- sysfs_remove_group(&hypervisor_subsys.kobj,
+- &xen_properties_group);
++ sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
+ }
+
+ #ifdef CONFIG_KEXEC
+@@ -350,13 +345,12 @@ HYPERVISOR_ATTR_RO(vmcoreinfo);
+
+ static int __init xen_sysfs_vmcoreinfo_init(void)
+ {
+- return sysfs_create_file(&hypervisor_subsys.kobj,
+- &vmcoreinfo_attr.attr);
++ return sysfs_create_file(hypervisor_kobj, &vmcoreinfo_attr.attr);
+ }
+
+ static void xen_sysfs_vmcoreinfo_destroy(void)
+ {
+- sysfs_remove_file(&hypervisor_subsys.kobj, &vmcoreinfo_attr.attr);
++ sysfs_remove_file(hypervisor_kobj, &vmcoreinfo_attr.attr);
+ }
+
+ #endif
+--- a/drivers/xen/gntdev/gntdev.c
++++ b/drivers/xen/gntdev/gntdev.c
+@@ -782,7 +782,7 @@ static pte_t gntdev_clear_pte(struct vm_
+ op.status);
+ } else {
+ /* USING SHADOW PAGE TABLES. */
+- copy = ptep_get_and_clear_full(vma->vm_mm, addr, ptep, is_fullmm);
++ copy = xen_ptep_get_and_clear_full(vma, addr, ptep, is_fullmm);
+ }
+
+ /* Finally, we unmap the grant from kernel space. */
+@@ -810,7 +810,7 @@ static pte_t gntdev_clear_pte(struct vm_
+ >> PAGE_SHIFT, INVALID_P2M_ENTRY);
+
+ } else {
+- copy = ptep_get_and_clear_full(vma->vm_mm, addr, ptep, is_fullmm);
++ copy = xen_ptep_get_and_clear_full(vma, addr, ptep, is_fullmm);
+ }
+
+ return copy;
+--- a/drivers/xen/scsifront/scsifront.c
++++ b/drivers/xen/scsifront/scsifront.c
+@@ -260,19 +260,19 @@ static int map_data_for_request(struct v
+ return -ENOMEM;
+ }
+
+- if (sc->use_sg) {
++ if (scsi_bufflen(sc)) {
+ /* quoted scsi_lib.c/scsi_req_map_sg . */
+- struct scatterlist *sg, *sgl = (struct scatterlist *)sc->request_buffer;
+- unsigned int data_len = sc->request_bufflen;
++ struct scatterlist *sg, *sgl = scsi_sglist(sc);
++ unsigned int data_len = scsi_bufflen(sc);
+
+- nr_pages = (sc->request_bufflen + sgl->offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
++ nr_pages = (data_len + sgl->offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ if (nr_pages > VSCSIIF_SG_TABLESIZE) {
+ printk(KERN_ERR "scsifront: Unable to map request_buffer for command!\n");
+ ref_cnt = (-E2BIG);
+ goto big_to_sg;
+ }
+
+- for_each_sg (sgl, sg, sc->use_sg, i) {
++ for_each_sg (sgl, sg, scsi_sg_count(sc), i) {
+ page = sg_page(sg);
+ off = sg->offset;
+ len = sg->length;
+@@ -306,45 +306,6 @@ static int map_data_for_request(struct v
+ ref_cnt++;
+ }
+ }
+- } else if (sc->request_bufflen) {
+- unsigned long end = ((unsigned long)sc->request_buffer
+- + sc->request_bufflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
+- unsigned long start = (unsigned long)sc->request_buffer >> PAGE_SHIFT;
+-
+- page = virt_to_page(sc->request_buffer);
+- nr_pages = end - start;
+- len = sc->request_bufflen;
+-
+- if (nr_pages > VSCSIIF_SG_TABLESIZE) {
+- ref_cnt = (-E2BIG);
+- goto big_to_sg;
+- }
+-
+- buffer_pfn = page_to_phys(page) >> PAGE_SHIFT;
+-
+- off = offset_in_page((unsigned long)sc->request_buffer);
+- for (i = 0; i < nr_pages; i++) {
+- bytes = PAGE_SIZE - off;
+-
+- if (bytes > len)
+- bytes = len;
+-
+- ref = gnttab_claim_grant_reference(&gref_head);
+- BUG_ON(ref == -ENOSPC);
+-
+- gnttab_grant_foreign_access_ref(ref, info->dev->otherend_id,
+- buffer_pfn, write);
+-
+- info->shadow[id].gref[i] = ref;
+- ring_req->seg[i].gref = ref;
+- ring_req->seg[i].offset = (uint16_t)off;
+- ring_req->seg[i].length = (uint16_t)bytes;
+-
+- buffer_pfn++;
+- len -= bytes;
+- off = 0;
+- ref_cnt++;
+- }
+ }
+
+ big_to_sg:
+--- a/drivers/xen/xenoprof/xenoprofile.c
++++ b/drivers/xen/xenoprof/xenoprofile.c
+@@ -79,7 +79,7 @@ static int xenoprof_resume(struct sys_de
+
+
+ static struct sysdev_class oprofile_sysclass = {
+- set_kset_name("oprofile"),
++ .name = "oprofile",
+ .resume = xenoprof_resume,
+ .suspend = xenoprof_suspend
+ };
+--- a/include/asm-x86/mach-xen/asm/agp.h
++++ b/include/asm-x86/mach-xen/asm/agp.h
+@@ -13,18 +13,13 @@
+ * page. This avoids data corruption on some CPUs.
+ */
+
+-/*
+- * Caller's responsibility to call global_flush_tlb() for performance
+- * reasons
+- */
+ #define map_page_into_agp(page) ( \
+ xen_create_contiguous_region((unsigned long)page_address(page), 0, 32) \
+- ?: change_page_attr(page, 1, PAGE_KERNEL_NOCACHE))
++ ?: set_pages_uc(page, 1))
+ #define unmap_page_from_agp(page) ( \
+ xen_destroy_contiguous_region((unsigned long)page_address(page), 0), \
+ /* only a fallback: xen_destroy_contiguous_region uses PAGE_KERNEL */ \
+- change_page_attr(page, 1, PAGE_KERNEL))
+-#define flush_agp_mappings() global_flush_tlb()
++ set_pages_wb(page, 1))
+
+ /*
+ * Could use CLFLUSH here if the cpu supports it. But then it would
+--- a/include/asm-x86/mach-xen/asm/desc_32.h
++++ /dev/null
+@@ -1,262 +0,0 @@
+-#ifndef __ARCH_DESC_H
+-#define __ARCH_DESC_H
+-
+-#include <asm/ldt.h>
+-#include <asm/segment.h>
+-
+-#ifndef __ASSEMBLY__
+-
+-#include <linux/preempt.h>
+-#include <linux/smp.h>
+-
+-#include <asm/mmu.h>
+-
+-struct Xgt_desc_struct {
+- unsigned short size;
+- unsigned long address __attribute__((packed));
+- unsigned short pad;
+-} __attribute__ ((packed));
+-
+-struct gdt_page
+-{
+- struct desc_struct gdt[GDT_ENTRIES];
+-} __attribute__((aligned(PAGE_SIZE)));
+-DECLARE_PER_CPU(struct gdt_page, gdt_page);
+-
+-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+-{
+- return per_cpu(gdt_page, cpu).gdt;
+-}
+-
+-extern struct Xgt_desc_struct idt_descr;
+-extern struct desc_struct idt_table[];
+-extern void set_intr_gate(unsigned int irq, void * addr);
+-
+-static inline void pack_descriptor(__u32 *a, __u32 *b,
+- unsigned long base, unsigned long limit, unsigned char type, unsigned char flags)
+-{
+- *a = ((base & 0xffff) << 16) | (limit & 0xffff);
+- *b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+- (limit & 0x000f0000) | ((type & 0xff) << 8) | ((flags & 0xf) << 20);
+-}
+-
+-static inline void pack_gate(__u32 *a, __u32 *b,
+- unsigned long base, unsigned short seg, unsigned char type, unsigned char flags)
+-{
+- *a = (seg << 16) | (base & 0xffff);
+- *b = (base & 0xffff0000) | ((type & 0xff) << 8) | (flags & 0xff);
+-}
+-
+-#define DESCTYPE_LDT 0x82 /* present, system, DPL-0, LDT */
+-#define DESCTYPE_TSS 0x89 /* present, system, DPL-0, 32-bit TSS */
+-#define DESCTYPE_TASK 0x85 /* present, system, DPL-0, task gate */
+-#define DESCTYPE_INT 0x8e /* present, system, DPL-0, interrupt gate */
+-#define DESCTYPE_TRAP 0x8f /* present, system, DPL-0, trap gate */
+-#define DESCTYPE_DPL3 0x60 /* DPL-3 */
+-#define DESCTYPE_S 0x10 /* !system */
+-
+-#ifndef CONFIG_XEN
+-#define load_TR_desc() native_load_tr_desc()
+-#define load_gdt(dtr) native_load_gdt(dtr)
+-#define load_idt(dtr) native_load_idt(dtr)
+-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
+-
+-#define store_gdt(dtr) native_store_gdt(dtr)
+-#define store_idt(dtr) native_store_idt(dtr)
+-#define store_tr(tr) (tr = native_store_tr())
+-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
+-
+-#define load_TLS(t, cpu) native_load_tls(t, cpu)
+-#define set_ldt native_set_ldt
+-
+-#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+-#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+-#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
+-
+-static inline void write_dt_entry(struct desc_struct *dt,
+- int entry, u32 entry_low, u32 entry_high)
+-{
+- dt[entry].a = entry_low;
+- dt[entry].b = entry_high;
+-}
+-
+-static inline void native_set_ldt(const void *addr, unsigned int entries)
+-{
+- if (likely(entries == 0))
+- __asm__ __volatile__("lldt %w0"::"q" (0));
+- else {
+- unsigned cpu = smp_processor_id();
+- __u32 a, b;
+-
+- pack_descriptor(&a, &b, (unsigned long)addr,
+- entries * sizeof(struct desc_struct) - 1,
+- DESCTYPE_LDT, 0);
+- write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, a, b);
+- __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+- }
+-}
+-
+-
+-static inline void native_load_tr_desc(void)
+-{
+- asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+-}
+-
+-static inline void native_load_gdt(const struct Xgt_desc_struct *dtr)
+-{
+- asm volatile("lgdt %0"::"m" (*dtr));
+-}
+-
+-static inline void native_load_idt(const struct Xgt_desc_struct *dtr)
+-{
+- asm volatile("lidt %0"::"m" (*dtr));
+-}
+-
+-static inline void native_store_gdt(struct Xgt_desc_struct *dtr)
+-{
+- asm ("sgdt %0":"=m" (*dtr));
+-}
+-
+-static inline void native_store_idt(struct Xgt_desc_struct *dtr)
+-{
+- asm ("sidt %0":"=m" (*dtr));
+-}
+-
+-static inline unsigned long native_store_tr(void)
+-{
+- unsigned long tr;
+- asm ("str %0":"=r" (tr));
+- return tr;
+-}
+-
+-static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
+-{
+- unsigned int i;
+- struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+-
+- for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+- gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
+-}
+-#else
+-#define load_TLS(t, cpu) xen_load_tls(t, cpu)
+-#define set_ldt xen_set_ldt
+-
+-extern int write_ldt_entry(void *ldt, int entry, __u32 entry_a, __u32 entry_b);
+-extern int write_gdt_entry(void *gdt, int entry, __u32 entry_a, __u32 entry_b);
+-
+-static inline void xen_load_tls(struct thread_struct *t, unsigned int cpu)
+-{
+- unsigned int i;
+- struct desc_struct *gdt = get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN;
+-
+- for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+- if (HYPERVISOR_update_descriptor(virt_to_machine(&gdt[i]),
+- *(u64 *)&t->tls_array[i]))
+- BUG();
+-}
+-#endif
+-
+-#ifndef CONFIG_X86_NO_IDT
+-static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg)
+-{
+- __u32 a, b;
+- pack_gate(&a, &b, (unsigned long)addr, seg, type, 0);
+- write_idt_entry(idt_table, gate, a, b);
+-}
+-#endif
+-
+-#ifndef CONFIG_X86_NO_TSS
+-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
+-{
+- __u32 a, b;
+- pack_descriptor(&a, &b, (unsigned long)addr,
+- offsetof(struct tss_struct, __cacheline_filler) - 1,
+- DESCTYPE_TSS, 0);
+- write_gdt_entry(get_cpu_gdt_table(cpu), entry, a, b);
+-}
+-#endif
+-
+-
+-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+-
+-#define LDT_entry_a(info) \
+- ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
+-
+-#define LDT_entry_b(info) \
+- (((info)->base_addr & 0xff000000) | \
+- (((info)->base_addr & 0x00ff0000) >> 16) | \
+- ((info)->limit & 0xf0000) | \
+- (((info)->read_exec_only ^ 1) << 9) | \
+- ((info)->contents << 10) | \
+- (((info)->seg_not_present ^ 1) << 15) | \
+- ((info)->seg_32bit << 22) | \
+- ((info)->limit_in_pages << 23) | \
+- ((info)->useable << 20) | \
+- 0x7000)
+-
+-#define LDT_empty(info) (\
+- (info)->base_addr == 0 && \
+- (info)->limit == 0 && \
+- (info)->contents == 0 && \
+- (info)->read_exec_only == 1 && \
+- (info)->seg_32bit == 0 && \
+- (info)->limit_in_pages == 0 && \
+- (info)->seg_not_present == 1 && \
+- (info)->useable == 0 )
+-
+-static inline void clear_LDT(void)
+-{
+- set_ldt(NULL, 0);
+-}
+-
+-/*
+- * load one particular LDT into the current CPU
+- */
+-static inline void load_LDT_nolock(mm_context_t *pc)
+-{
+- set_ldt(pc->ldt, pc->size);
+-}
+-
+-static inline void load_LDT(mm_context_t *pc)
+-{
+- preempt_disable();
+- load_LDT_nolock(pc);
+- preempt_enable();
+-}
+-
+-static inline unsigned long get_desc_base(unsigned long *desc)
+-{
+- unsigned long base;
+- base = ((desc[0] >> 16) & 0x0000ffff) |
+- ((desc[1] << 16) & 0x00ff0000) |
+- (desc[1] & 0xff000000);
+- return base;
+-}
+-
+-#else /* __ASSEMBLY__ */
+-
+-/*
+- * GET_DESC_BASE reads the descriptor base of the specified segment.
+- *
+- * Args:
+- * idx - descriptor index
+- * gdt - GDT pointer
+- * base - 32bit register to which the base will be written
+- * lo_w - lo word of the "base" register
+- * lo_b - lo byte of the "base" register
+- * hi_b - hi byte of the low word of the "base" register
+- *
+- * Example:
+- * GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
+- * Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+- */
+-#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+- movb idx*8+4(gdt), lo_b; \
+- movb idx*8+7(gdt), hi_b; \
+- shll $16, base; \
+- movw idx*8+2(gdt), lo_w;
+-
+-#endif /* !__ASSEMBLY__ */
+-
+-#endif
+--- a/include/asm-x86/mach-xen/asm/desc_64.h
++++ /dev/null
+@@ -1,228 +0,0 @@
+-/* Written 2000 by Andi Kleen */
+-#ifndef __ARCH_DESC_H
+-#define __ARCH_DESC_H
+-
+-#include <linux/threads.h>
+-#include <asm/ldt.h>
+-
+-#ifndef __ASSEMBLY__
+-
+-#include <linux/string.h>
+-#include <linux/smp.h>
+-#include <asm/desc_defs.h>
+-
+-#include <asm/segment.h>
+-#include <asm/mmu.h>
+-
+-extern struct desc_ptr idt_descr, cpu_gdt_descr[NR_CPUS];
+-
+-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+-
+-#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
+-#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
+-
+-static inline void clear_LDT(void)
+-{
+- int cpu = get_cpu();
+-
+- /*
+- * NB. We load the default_ldt for lcall7/27 handling on demand, as
+- * it slows down context switching. Noone uses it anyway.
+- */
+- cpu = cpu; /* XXX avoid compiler warning */
+- xen_set_ldt(NULL, 0);
+- put_cpu();
+-}
+-
+-#ifndef CONFIG_X86_NO_TSS
+-static inline unsigned long __store_tr(void)
+-{
+- unsigned long tr;
+-
+- asm volatile ("str %w0":"=r" (tr));
+- return tr;
+-}
+-
+-#define store_tr(tr) (tr) = __store_tr()
+-#endif
+-
+-/*
+- * This is the ldt that every process will get unless we need
+- * something other than this.
+- */
+-extern struct desc_struct default_ldt[];
+-#ifndef CONFIG_X86_NO_IDT
+-extern struct gate_struct idt_table[];
+-#endif
+-extern struct desc_ptr cpu_gdt_descr[];
+-
+-/* the cpu gdt accessor */
+-#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address)
+-
+-#ifndef CONFIG_XEN
+-static inline void load_gdt(const struct desc_ptr *ptr)
+-{
+- asm volatile("lgdt %w0"::"m" (*ptr));
+-}
+-
+-static inline void store_gdt(struct desc_ptr *ptr)
+-{
+- asm("sgdt %w0":"=m" (*ptr));
+-}
+-#endif
+-
+-static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist)
+-{
+- struct gate_struct s;
+- s.offset_low = PTR_LOW(func);
+- s.segment = __KERNEL_CS;
+- s.ist = ist;
+- s.p = 1;
+- s.dpl = dpl;
+- s.zero0 = 0;
+- s.zero1 = 0;
+- s.type = type;
+- s.offset_middle = PTR_MIDDLE(func);
+- s.offset_high = PTR_HIGH(func);
+- /* does not need to be atomic because it is only done once at setup time */
+- memcpy(adr, &s, 16);
+-}
+-
+-#ifndef CONFIG_X86_NO_IDT
+-static inline void set_intr_gate(int nr, void *func)
+-{
+- BUG_ON((unsigned)nr > 0xFF);
+- _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, 0);
+-}
+-
+-static inline void set_intr_gate_ist(int nr, void *func, unsigned ist)
+-{
+- BUG_ON((unsigned)nr > 0xFF);
+- _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 0, ist);
+-}
+-
+-static inline void set_system_gate(int nr, void *func)
+-{
+- BUG_ON((unsigned)nr > 0xFF);
+- _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, 0);
+-}
+-
+-static inline void set_system_gate_ist(int nr, void *func, unsigned ist)
+-{
+- _set_gate(&idt_table[nr], GATE_INTERRUPT, (unsigned long) func, 3, ist);
+-}
+-
+-static inline void load_idt(const struct desc_ptr *ptr)
+-{
+- asm volatile("lidt %w0"::"m" (*ptr));
+-}
+-
+-static inline void store_idt(struct desc_ptr *dtr)
+-{
+- asm("sidt %w0":"=m" (*dtr));
+-}
+-#endif
+-
+-static inline void set_tssldt_descriptor(void *ptr, unsigned long tss, unsigned type,
+- unsigned size)
+-{
+- struct ldttss_desc d;
+- memset(&d,0,sizeof(d));
+- d.limit0 = size & 0xFFFF;
+- d.base0 = PTR_LOW(tss);
+- d.base1 = PTR_MIDDLE(tss) & 0xFF;
+- d.type = type;
+- d.p = 1;
+- d.limit1 = (size >> 16) & 0xF;
+- d.base2 = (PTR_MIDDLE(tss) >> 8) & 0xFF;
+- d.base3 = PTR_HIGH(tss);
+- memcpy(ptr, &d, 16);
+-}
+-
+-#ifndef CONFIG_X86_NO_TSS
+-static inline void set_tss_desc(unsigned cpu, void *addr)
+-{
+- /*
+- * sizeof(unsigned long) coming from an extra "long" at the end
+- * of the iobitmap. See tss_struct definition in processor.h
+- *
+- * -1? seg base+limit should be pointing to the address of the
+- * last valid byte
+- */
+- set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_TSS],
+- (unsigned long)addr, DESC_TSS,
+- IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
+-}
+-#endif
+-
+-static inline void set_ldt_desc(unsigned cpu, void *addr, int size)
+-{
+- set_tssldt_descriptor(&cpu_gdt(cpu)[GDT_ENTRY_LDT], (unsigned long)addr,
+- DESC_LDT, size * 8 - 1);
+-}
+-
+-#define LDT_entry_a(info) \
+- ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
+-/* Don't allow setting of the lm bit. It is useless anyways because
+- 64bit system calls require __USER_CS. */
+-#define LDT_entry_b(info) \
+- (((info)->base_addr & 0xff000000) | \
+- (((info)->base_addr & 0x00ff0000) >> 16) | \
+- ((info)->limit & 0xf0000) | \
+- (((info)->read_exec_only ^ 1) << 9) | \
+- ((info)->contents << 10) | \
+- (((info)->seg_not_present ^ 1) << 15) | \
+- ((info)->seg_32bit << 22) | \
+- ((info)->limit_in_pages << 23) | \
+- ((info)->useable << 20) | \
+- /* ((info)->lm << 21) | */ \
+- 0x7000)
+-
+-#define LDT_empty(info) (\
+- (info)->base_addr == 0 && \
+- (info)->limit == 0 && \
+- (info)->contents == 0 && \
+- (info)->read_exec_only == 1 && \
+- (info)->seg_32bit == 0 && \
+- (info)->limit_in_pages == 0 && \
+- (info)->seg_not_present == 1 && \
+- (info)->useable == 0 && \
+- (info)->lm == 0)
+-
+-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
+-{
+- unsigned int i;
+- u64 *gdt = (u64 *)(cpu_gdt(cpu) + GDT_ENTRY_TLS_MIN);
+-
+- for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
+- if (HYPERVISOR_update_descriptor(virt_to_machine(&gdt[i]),
+- t->tls_array[i]))
+- BUG();
+-}
+-
+-/*
+- * load one particular LDT into the current CPU
+- */
+-static inline void load_LDT_nolock (mm_context_t *pc, int cpu)
+-{
+- void *segments = pc->ldt;
+- int count = pc->size;
+-
+- if (likely(!count))
+- segments = NULL;
+-
+- xen_set_ldt(segments, count);
+-}
+-
+-static inline void load_LDT(mm_context_t *pc)
+-{
+- int cpu = get_cpu();
+- load_LDT_nolock(pc, cpu);
+- put_cpu();
+-}
+-
+-extern struct desc_ptr idt_descr;
+-
+-#endif /* !__ASSEMBLY__ */
+-
+-#endif
+--- a/include/asm-x86/mach-xen/asm/desc.h
++++ b/include/asm-x86/mach-xen/asm/desc.h
+@@ -1,5 +1,404 @@
++#ifndef _ASM_DESC_H_
++#define _ASM_DESC_H_
++
++#ifndef __ASSEMBLY__
++#include <asm/desc_defs.h>
++#include <asm/ldt.h>
++#include <asm/mmu.h>
++#include <linux/smp.h>
++
++static inline void fill_ldt(struct desc_struct *desc,
++ const struct user_desc *info)
++{
++ desc->limit0 = info->limit & 0x0ffff;
++ desc->base0 = info->base_addr & 0x0000ffff;
++
++ desc->base1 = (info->base_addr & 0x00ff0000) >> 16;
++ desc->type = (info->read_exec_only ^ 1) << 1;
++ desc->type |= info->contents << 2;
++ desc->s = 1;
++ desc->dpl = 0x3;
++ desc->p = info->seg_not_present ^ 1;
++ desc->limit = (info->limit & 0xf0000) >> 16;
++ desc->avl = info->useable;
++ desc->d = info->seg_32bit;
++ desc->g = info->limit_in_pages;
++ desc->base2 = (info->base_addr & 0xff000000) >> 24;
++}
++
++#ifndef CONFIG_X86_NO_IDT
++extern struct desc_ptr idt_descr;
++extern gate_desc idt_table[];
++#endif
++
++#ifdef CONFIG_X86_64
++extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
++extern struct desc_ptr cpu_gdt_descr[];
++/* the cpu gdt accessor */
++#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
++
++static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
++ unsigned dpl, unsigned ist, unsigned seg)
++{
++ gate->offset_low = PTR_LOW(func);
++ gate->segment = __KERNEL_CS;
++ gate->ist = ist;
++ gate->p = 1;
++ gate->dpl = dpl;
++ gate->zero0 = 0;
++ gate->zero1 = 0;
++ gate->type = type;
++ gate->offset_middle = PTR_MIDDLE(func);
++ gate->offset_high = PTR_HIGH(func);
++}
++
++#else
++struct gdt_page {
++ struct desc_struct gdt[GDT_ENTRIES];
++} __attribute__((aligned(PAGE_SIZE)));
++DECLARE_PER_CPU(struct gdt_page, gdt_page);
++
++static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
++{
++ return per_cpu(gdt_page, cpu).gdt;
++}
++
++static inline void pack_gate(gate_desc *gate, unsigned char type,
++ unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
++
++{
++ gate->a = (seg << 16) | (base & 0xffff);
++ gate->b = (base & 0xffff0000) |
++ (((0x80 | type | (dpl << 5)) & 0xff) << 8);
++}
++
++#endif
++
++static inline int desc_empty(const void *ptr)
++{
++ const u32 *desc = ptr;
++ return !(desc[0] | desc[1]);
++}
++
++#ifndef CONFIG_XEN
++#define load_TR_desc() native_load_tr_desc()
++#define load_gdt(dtr) native_load_gdt(dtr)
++#define load_idt(dtr) native_load_idt(dtr)
++#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
++#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
++
++#define store_gdt(dtr) native_store_gdt(dtr)
++#define store_idt(dtr) native_store_idt(dtr)
++#define store_tr(tr) (tr = native_store_tr())
++#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
++
++#define load_TLS(t, cpu) native_load_tls(t, cpu)
++#define set_ldt native_set_ldt
++
++#define write_ldt_entry(dt, entry, desc) \
++ native_write_ldt_entry(dt, entry, desc)
++#define write_gdt_entry(dt, entry, desc, type) \
++ native_write_gdt_entry(dt, entry, desc, type)
++#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
++
++static inline void native_write_idt_entry(gate_desc *idt, int entry,
++ const gate_desc *gate)
++{
++ memcpy(&idt[entry], gate, sizeof(*gate));
++}
++
++static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
++ const void *desc)
++{
++ memcpy(&ldt[entry], desc, 8);
++}
++
++static inline void native_write_gdt_entry(struct desc_struct *gdt, int entry,
++ const void *desc, int type)
++{
++ unsigned int size;
++ switch (type) {
++ case DESC_TSS:
++ size = sizeof(tss_desc);
++ break;
++ case DESC_LDT:
++ size = sizeof(ldt_desc);
++ break;
++ default:
++ size = sizeof(struct desc_struct);
++ break;
++ }
++ memcpy(&gdt[entry], desc, size);
++}
++#endif
++
++static inline void pack_descriptor(struct desc_struct *desc, unsigned long base,
++ unsigned long limit, unsigned char type,
++ unsigned char flags)
++{
++ desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
++ desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
++ (limit & 0x000f0000) | ((type & 0xff) << 8) |
++ ((flags & 0xf) << 20);
++ desc->p = 1;
++}
++
++
++#ifndef CONFIG_XEN
++static inline void set_tssldt_descriptor(void *d, unsigned long addr,
++ unsigned type, unsigned size)
++{
++#ifdef CONFIG_X86_64
++ struct ldttss_desc64 *desc = d;
++ memset(desc, 0, sizeof(*desc));
++ desc->limit0 = size & 0xFFFF;
++ desc->base0 = PTR_LOW(addr);
++ desc->base1 = PTR_MIDDLE(addr) & 0xFF;
++ desc->type = type;
++ desc->p = 1;
++ desc->limit1 = (size >> 16) & 0xF;
++ desc->base2 = (PTR_MIDDLE(addr) >> 8) & 0xFF;
++ desc->base3 = PTR_HIGH(addr);
++#else
++
++ pack_descriptor((struct desc_struct *)d, addr, size, 0x80 | type, 0);
++#endif
++}
++
++static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
++{
++ struct desc_struct *d = get_cpu_gdt_table(cpu);
++ tss_desc tss;
++
++ /*
++ * sizeof(unsigned long) coming from an extra "long" at the end
++ * of the iobitmap. See tss_struct definition in processor.h
++ *
++ * -1? seg base+limit should be pointing to the address of the
++ * last valid byte
++ */
++ set_tssldt_descriptor(&tss, (unsigned long)addr, DESC_TSS,
++ IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
++ write_gdt_entry(d, entry, &tss, DESC_TSS);
++}
++
++#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
++
++static inline void native_set_ldt(const void *addr, unsigned int entries)
++{
++ if (likely(entries == 0))
++ __asm__ __volatile__("lldt %w0"::"q" (0));
++ else {
++ unsigned cpu = smp_processor_id();
++ ldt_desc ldt;
++
++ set_tssldt_descriptor(&ldt, (unsigned long)addr,
++ DESC_LDT, entries * sizeof(ldt) - 1);
++ write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
++ &ldt, DESC_LDT);
++ __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
++ }
++}
++
++static inline void native_load_tr_desc(void)
++{
++ asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
++}
++
++static inline void native_load_gdt(const struct desc_ptr *dtr)
++{
++ asm volatile("lgdt %0"::"m" (*dtr));
++}
++
++static inline void native_load_idt(const struct desc_ptr *dtr)
++{
++ asm volatile("lidt %0"::"m" (*dtr));
++}
++
++static inline void native_store_gdt(struct desc_ptr *dtr)
++{
++ asm volatile("sgdt %0":"=m" (*dtr));
++}
++
++static inline void native_store_idt(struct desc_ptr *dtr)
++{
++ asm volatile("sidt %0":"=m" (*dtr));
++}
++
++static inline unsigned long native_store_tr(void)
++{
++ unsigned long tr;
++ asm volatile("str %0":"=r" (tr));
++ return tr;
++}
++
++static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
++{
++ unsigned int i;
++ struct desc_struct *gdt = get_cpu_gdt_table(cpu);
++
++ for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
++ gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
++}
++#else
++#define load_TLS(t, cpu) xen_load_tls(t, cpu)
++#define set_ldt xen_set_ldt
++
++extern int write_ldt_entry(struct desc_struct *ldt, int entry,
++ const void *desc);
++extern int write_gdt_entry(struct desc_struct *gdt, int entry,
++ const void *desc, int type);
++
++static inline void xen_load_tls(struct thread_struct *t, unsigned int cpu)
++{
++ unsigned int i;
++ struct desc_struct *gdt = get_cpu_gdt_table(cpu) + GDT_ENTRY_TLS_MIN;
++
++ for (i = 0; i < GDT_ENTRY_TLS_ENTRIES; i++)
++ if (HYPERVISOR_update_descriptor(virt_to_machine(&gdt[i]),
++ *(u64 *)&t->tls_array[i]))
++ BUG();
++}
++#endif
++
++#define _LDT_empty(info) (\
++ (info)->base_addr == 0 && \
++ (info)->limit == 0 && \
++ (info)->contents == 0 && \
++ (info)->read_exec_only == 1 && \
++ (info)->seg_32bit == 0 && \
++ (info)->limit_in_pages == 0 && \
++ (info)->seg_not_present == 1 && \
++ (info)->useable == 0)
++
++#ifdef CONFIG_X86_64
++#define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
++#else
++#define LDT_empty(info) (_LDT_empty(info))
++#endif
++
++static inline void clear_LDT(void)
++{
++ set_ldt(NULL, 0);
++}
++
++/*
++ * load one particular LDT into the current CPU
++ */
++static inline void load_LDT_nolock(mm_context_t *pc)
++{
++ set_ldt(pc->ldt, pc->size);
++}
++
++static inline void load_LDT(mm_context_t *pc)
++{
++ preempt_disable();
++ load_LDT_nolock(pc);
++ preempt_enable();
++}
++
++static inline unsigned long get_desc_base(const struct desc_struct *desc)
++{
++ return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
++}
++
++static inline unsigned long get_desc_limit(const struct desc_struct *desc)
++{
++ return desc->limit0 | (desc->limit << 16);
++}
++
++#ifndef CONFIG_X86_NO_IDT
++static inline void _set_gate(int gate, unsigned type, void *addr,
++ unsigned dpl, unsigned ist, unsigned seg)
++{
++ gate_desc s;
++ pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
++ /*
++ * does not need to be atomic because it is only done once at
++ * setup time
++ */
++ write_idt_entry(idt_table, gate, &s);
++}
++
++/*
++ * This needs to use 'idt_table' rather than 'idt', and
++ * thus use the _nonmapped_ version of the IDT, as the
++ * Pentium F0 0F bugfix can have resulted in the mapped
++ * IDT being write-protected.
++ */
++static inline void set_intr_gate(unsigned int n, void *addr)
++{
++ BUG_ON((unsigned)n > 0xFF);
++ _set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
++}
++
++/*
++ * This routine sets up an interrupt gate at directory privilege level 3.
++ */
++static inline void set_system_intr_gate(unsigned int n, void *addr)
++{
++ BUG_ON((unsigned)n > 0xFF);
++ _set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
++}
++
++static inline void set_trap_gate(unsigned int n, void *addr)
++{
++ BUG_ON((unsigned)n > 0xFF);
++ _set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
++}
++
++static inline void set_system_gate(unsigned int n, void *addr)
++{
++ BUG_ON((unsigned)n > 0xFF);
+ #ifdef CONFIG_X86_32
+-# include "desc_32.h"
++ _set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
++#else
++ _set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
++#endif
++}
++
++static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
++{
++ BUG_ON((unsigned)n > 0xFF);
++ _set_gate(n, GATE_TASK, (void *)0, 0, 0, (gdt_entry<<3));
++}
++
++static inline void set_intr_gate_ist(int n, void *addr, unsigned ist)
++{
++ BUG_ON((unsigned)n > 0xFF);
++ _set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
++}
++
++static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
++{
++ BUG_ON((unsigned)n > 0xFF);
++ _set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
++}
++#endif
++
+ #else
+-# include "desc_64.h"
++/*
++ * GET_DESC_BASE reads the descriptor base of the specified segment.
++ *
++ * Args:
++ * idx - descriptor index
++ * gdt - GDT pointer
++ * base - 32bit register to which the base will be written
++ * lo_w - lo word of the "base" register
++ * lo_b - lo byte of the "base" register
++ * hi_b - hi byte of the low word of the "base" register
++ *
++ * Example:
++ * GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah)
++ * Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
++ */
++#define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
++ movb idx*8+4(gdt), lo_b; \
++ movb idx*8+7(gdt), hi_b; \
++ shll $16, base; \
++ movw idx*8+2(gdt), lo_w;
++
++
++#endif /* __ASSEMBLY__ */
++
+ #endif
+--- a/include/asm-x86/mach-xen/asm/dma-mapping_32.h
++++ b/include/asm-x86/mach-xen/asm/dma-mapping_32.h
+@@ -84,23 +84,13 @@ dma_sync_single_range_for_device(struct
+ dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
+ }
+
+-static inline void
++extern void
+ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- if (swiotlb)
+- swiotlb_sync_sg_for_cpu(dev,sg,nelems,direction);
+- flush_write_buffers();
+-}
++ enum dma_data_direction direction);
+
+-static inline void
++extern void
+ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- if (swiotlb)
+- swiotlb_sync_sg_for_device(dev,sg,nelems,direction);
+- flush_write_buffers();
+-}
++ enum dma_data_direction direction);
+
+ extern int
+ dma_mapping_error(dma_addr_t dma_addr);
+--- a/include/asm-x86/mach-xen/asm/fixmap_32.h
++++ b/include/asm-x86/mach-xen/asm/fixmap_32.h
+@@ -64,7 +64,7 @@ enum fixed_addresses {
+ #endif
+ #ifdef CONFIG_X86_VISWS_APIC
+ FIX_CO_CPU, /* Cobalt timer */
+- FIX_CO_APIC, /* Cobalt APIC Redirection Table */
++ FIX_CO_APIC, /* Cobalt APIC Redirection Table */
+ FIX_LI_PCIA, /* Lithium PCI Bridge A */
+ FIX_LI_PCIB, /* Lithium PCI Bridge B */
+ #endif
+@@ -73,7 +73,7 @@ enum fixed_addresses {
+ #endif
+ #ifdef CONFIG_X86_CYCLONE_TIMER
+ FIX_CYCLONE_TIMER, /*cyclone timer register*/
+-#endif
++#endif
+ #ifdef CONFIG_HIGHMEM
+ FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
+ FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
+@@ -93,11 +93,23 @@ enum fixed_addresses {
+ FIX_ISAMAP_END,
+ FIX_ISAMAP_BEGIN = FIX_ISAMAP_END + NR_FIX_ISAMAPS - 1,
+ __end_of_permanent_fixed_addresses,
+- /* temporary boot-time mappings, used before ioremap() is functional */
+-#define NR_FIX_BTMAPS 16
+- FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
+- FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS - 1,
++ /*
++ * 256 temporary boot-time mappings, used by early_ioremap(),
++ * before ioremap() is functional.
++ *
++ * We round it up to the next 512 pages boundary so that we
++ * can have a single pgd entry and a single pte table:
++ */
++#define NR_FIX_BTMAPS 64
++#define FIX_BTMAPS_NESTING 4
++ FIX_BTMAP_END =
++ __end_of_permanent_fixed_addresses + 512 -
++ (__end_of_permanent_fixed_addresses & 511),
++ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+ FIX_WP_TEST,
++#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
++ FIX_OHCI1394_BASE,
++#endif
+ __end_of_fixed_addresses
+ };
+
+--- a/include/asm-x86/mach-xen/asm/fixmap_64.h
++++ b/include/asm-x86/mach-xen/asm/fixmap_64.h
+@@ -15,6 +15,7 @@
+ #include <asm/apicdef.h>
+ #include <asm/page.h>
+ #include <asm/vsyscall.h>
++#include <asm/efi.h>
+ #include <asm/acpi.h>
+
+ /*
+@@ -46,6 +47,10 @@ enum fixed_addresses {
+ FIX_IO_APIC_BASE_0,
+ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
+ #endif
++#ifdef CONFIG_EFI
++ FIX_EFI_IO_MAP_LAST_PAGE,
++ FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE+MAX_EFI_IO_PAGES-1,
++#endif
+ #ifdef CONFIG_ACPI
+ FIX_ACPI_BEGIN,
+ FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
+@@ -55,10 +60,22 @@ enum fixed_addresses {
+ FIX_ISAMAP_END,
+ FIX_ISAMAP_BEGIN = FIX_ISAMAP_END + NR_FIX_ISAMAPS - 1,
+ __end_of_permanent_fixed_addresses,
+- /* temporary boot-time mappings, used before ioremap() is functional */
+-#define NR_FIX_BTMAPS 16
+- FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
+- FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS - 1,
++ /*
++ * 256 temporary boot-time mappings, used by early_ioremap(),
++ * before ioremap() is functional.
++ *
++ * We round it up to the next 512 pages boundary so that we
++ * can have a single pgd entry and a single pte table:
++ */
++#define NR_FIX_BTMAPS 64
++#define FIX_BTMAPS_NESTING 4
++ FIX_BTMAP_END =
++ __end_of_permanent_fixed_addresses + 512 -
++ (__end_of_permanent_fixed_addresses & 511),
++ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
++#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
++ FIX_OHCI1394_BASE,
++#endif
+ __end_of_fixed_addresses
+ };
+
+--- a/include/asm-x86/mach-xen/asm/highmem.h
++++ b/include/asm-x86/mach-xen/asm/highmem.h
+@@ -37,11 +37,6 @@ extern pte_t *pkmap_page_table;
+ * easily, subsequent pte tables have to be allocated in one physical
+ * chunk of RAM.
+ */
+-#ifdef CONFIG_X86_PAE
+-#define LAST_PKMAP 512
+-#else
+-#define LAST_PKMAP 1024
+-#endif
+ /*
+ * Ordering is:
+ *
+@@ -57,13 +52,12 @@ extern pte_t *pkmap_page_table;
+ * VMALLOC_START
+ * high_memory
+ */
+-#define PKMAP_BASE ( (FIXADDR_BOOT_START - PAGE_SIZE*(LAST_PKMAP + 1)) & PMD_MASK )
+ #define LAST_PKMAP_MASK (LAST_PKMAP-1)
+ #define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT)
+ #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
+
+-extern void * FASTCALL(kmap_high(struct page *page));
+-extern void FASTCALL(kunmap_high(struct page *page));
++extern void *kmap_high(struct page *page);
++extern void kunmap_high(struct page *page);
+
+ void *kmap(struct page *page);
+ void kunmap(struct page *page);
+--- a/include/asm-x86/mach-xen/asm/hypervisor.h
++++ b/include/asm-x86/mach-xen/asm/hypervisor.h
+@@ -264,6 +264,25 @@ HYPERVISOR_poll(
+ return rc;
+ }
+
++static inline int __must_check
++HYPERVISOR_poll_no_timeout(
++ evtchn_port_t *ports, unsigned int nr_ports)
++{
++ int rc;
++ struct sched_poll sched_poll = {
++ .nr_ports = nr_ports
++ };
++ set_xen_guest_handle(sched_poll.ports, ports);
++
++ rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (rc == -ENOSYS)
++ rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
++#endif
++
++ return rc;
++}
++
+ #ifdef CONFIG_XEN
+
+ static inline void
+--- a/include/asm-x86/mach-xen/asm/io_32.h
++++ b/include/asm-x86/mach-xen/asm/io_32.h
+@@ -113,8 +113,6 @@ static inline void * phys_to_virt(unsign
+ ((bvec_to_pseudophys((vec1)) + (vec1)->bv_len) == \
+ bvec_to_pseudophys((vec2))))
+
+-extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
+-
+ /**
+ * ioremap - map bus memory into CPU space
+ * @offset: bus address of the memory
+@@ -124,32 +122,39 @@ extern void __iomem * __ioremap(unsigned
+ * make bus memory CPU accessible via the readb/readw/readl/writeb/
+ * writew/writel functions and the other mmio helpers. The returned
+ * address is not guaranteed to be usable directly as a virtual
+- * address.
++ * address.
+ *
+ * If the area you are trying to map is a PCI BAR you should have a
+ * look at pci_iomap().
+ */
++extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size);
++extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size);
+
+-static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
++/*
++ * The default ioremap() behavior is non-cached:
++ */
++static inline void __iomem *ioremap(resource_size_t offset, unsigned long size)
+ {
+- return __ioremap(offset, size, 0);
++ return ioremap_nocache(offset, size);
+ }
+
+-extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
+ extern void iounmap(volatile void __iomem *addr);
+
+ /*
+- * bt_ioremap() and bt_iounmap() are for temporary early boot-time
++ * early_ioremap() and early_iounmap() are for temporary early boot-time
+ * mappings, before the real ioremap() is functional.
+ * A boot-time mapping is currently limited to at most 16 pages.
+ */
+-extern void *bt_ioremap(unsigned long offset, unsigned long size);
+-extern void bt_iounmap(void *addr, unsigned long size);
++extern void early_ioremap_init(void);
++extern void early_ioremap_clear(void);
++extern void early_ioremap_reset(void);
++extern void *early_ioremap(unsigned long offset, unsigned long size);
++extern void early_iounmap(void *addr, unsigned long size);
+ extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
+
+ /* Use early IO mappings for DMI because it's initialized early */
+-#define dmi_ioremap bt_ioremap
+-#define dmi_iounmap bt_iounmap
++#define dmi_ioremap early_ioremap
++#define dmi_iounmap early_iounmap
+ #define dmi_alloc alloc_bootmem
+
+ /*
+@@ -263,43 +268,21 @@ static inline void flush_write_buffers(v
+
+ #endif /* __KERNEL__ */
+
+-static inline void xen_io_delay(void)
+-{
+- asm volatile("outb %%al,$0x80" : : : "memory");
+-}
++extern void xen_io_delay(void);
++#define native_io_delay xen_io_delay
++
++extern int io_delay_type;
++extern void io_delay_init(void);
+
+ static inline void slow_down_io(void) {
+- xen_io_delay();
++ native_io_delay();
+ #ifdef REALLY_SLOW_IO
+- xen_io_delay();
+- xen_io_delay();
+- xen_io_delay();
++ native_io_delay();
++ native_io_delay();
++ native_io_delay();
+ #endif
+ }
+
+-#ifdef CONFIG_X86_NUMAQ
+-extern void *xquad_portio; /* Where the IO area was mapped */
+-#define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
+-#define __BUILDIO(bwl,bw,type) \
+-static inline void out##bwl##_quad(unsigned type value, int port, int quad) { \
+- if (xquad_portio) \
+- write##bwl(value, XQUAD_PORT_ADDR(port, quad)); \
+- else \
+- out##bwl##_local(value, port); \
+-} \
+-static inline void out##bwl(unsigned type value, int port) { \
+- out##bwl##_quad(value, port, 0); \
+-} \
+-static inline unsigned type in##bwl##_quad(int port, int quad) { \
+- if (xquad_portio) \
+- return read##bwl(XQUAD_PORT_ADDR(port, quad)); \
+- else \
+- return in##bwl##_local(port); \
+-} \
+-static inline unsigned type in##bwl(int port) { \
+- return in##bwl##_quad(port, 0); \
+-}
+-#else
+ #define __BUILDIO(bwl,bw,type) \
+ static inline void out##bwl(unsigned type value, int port) { \
+ out##bwl##_local(value, port); \
+@@ -307,8 +290,6 @@ static inline void out##bwl(unsigned typ
+ static inline unsigned type in##bwl(int port) { \
+ return in##bwl##_local(port); \
+ }
+-#endif
+-
+
+ #define BUILDIO(bwl,bw,type) \
+ static inline void out##bwl##_local(unsigned type value, int port) { \
+--- a/include/asm-x86/mach-xen/asm/io_64.h
++++ b/include/asm-x86/mach-xen/asm/io_64.h
+@@ -36,13 +36,21 @@
+ * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ */
+
+-#define __SLOW_DOWN_IO "\noutb %%al,$0x80"
++extern void xen_io_delay(void);
++#define native_io_delay xen_io_delay
+
++extern int io_delay_type;
++extern void io_delay_init(void);
++
++static inline void slow_down_io(void)
++{
++ native_io_delay();
+ #ifdef REALLY_SLOW_IO
+-#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
+-#else
+-#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO
++ native_io_delay();
++ native_io_delay();
++ native_io_delay();
+ #endif
++}
+
+ /*
+ * Talk about misusing macros..
+@@ -53,9 +61,15 @@ static inline void out##s(unsigned x val
+ #define __OUT2(s,s1,s2) \
+ __asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
+
++#ifndef REALLY_SLOW_IO
++#define REALLY_SLOW_IO
++#define UNSET_REALLY_SLOW_IO
++#endif
++
+ #define __OUT(s,s1,x) \
+ __OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
+-__OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} \
++__OUT1(s##_p, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
++ slow_down_io(); }
+
+ #define __IN1(s) \
+ static inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
+@@ -64,8 +78,13 @@ static inline RETURN_TYPE in##s(unsigned
+ __asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
+
+ #define __IN(s,s1,i...) \
+-__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
+-__IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \
++__IN1(s) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); return _v; } \
++__IN1(s##_p) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
++ slow_down_io(); return _v; }
++
++#ifdef UNSET_REALLY_SLOW_IO
++#undef REALLY_SLOW_IO
++#endif
+
+ #define __INS(s) \
+ static inline void ins##s(unsigned short port, void * addr, unsigned long count) \
+@@ -143,25 +162,30 @@ static inline void * phys_to_virt(unsign
+
+ #include <asm-generic/iomap.h>
+
+-extern void __iomem *__ioremap(unsigned long offset, unsigned long size, unsigned long flags);
+-
+-static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
+-{
+- return __ioremap(offset, size, 0);
+-}
+-
+-extern void *bt_ioremap(unsigned long addr, unsigned long size);
+-extern void bt_iounmap(void *addr, unsigned long size);
+-#define early_ioremap bt_ioremap
+-#define early_iounmap bt_iounmap
++extern void early_ioremap_init(void);
++extern void early_ioremap_clear(void);
++extern void early_ioremap_reset(void);
++extern void *early_ioremap(unsigned long addr, unsigned long size);
++extern void early_iounmap(void *addr, unsigned long size);
+
+ /*
+ * This one maps high address device memory and turns off caching for that area.
+ * it's useful if some control registers are in such an area and write combining
+ * or read caching is not desirable:
+ */
+-extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
++extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size);
++extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size);
++
++/*
++ * The default ioremap() behavior is non-cached:
++ */
++static inline void __iomem *ioremap(resource_size_t offset, unsigned long size)
++{
++ return ioremap_nocache(offset, size);
++}
++
+ extern void iounmap(volatile void __iomem *addr);
++
+ extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
+
+ /*
+--- a/include/asm-x86/mach-xen/asm/irqflags_32.h
++++ /dev/null
+@@ -1,212 +0,0 @@
+-/*
+- * include/asm-i386/irqflags.h
+- *
+- * IRQ flags handling
+- *
+- * This file gets included from lowlevel asm headers too, to provide
+- * wrapped versions of the local_irq_*() APIs, based on the
+- * raw_local_irq_*() functions from the lowlevel headers.
+- */
+-#ifndef _ASM_IRQFLAGS_H
+-#define _ASM_IRQFLAGS_H
+-
+-#ifndef __ASSEMBLY__
+-#define xen_save_fl(void) (current_vcpu_info()->evtchn_upcall_mask)
+-
+-#define xen_restore_fl(f) \
+-do { \
+- vcpu_info_t *_vcpu; \
+- barrier(); \
+- _vcpu = current_vcpu_info(); \
+- if ((_vcpu->evtchn_upcall_mask = (f)) == 0) { \
+- barrier(); /* unmask then check (avoid races) */\
+- if (unlikely(_vcpu->evtchn_upcall_pending)) \
+- force_evtchn_callback(); \
+- } \
+-} while (0)
+-
+-#define xen_irq_disable() \
+-do { \
+- current_vcpu_info()->evtchn_upcall_mask = 1; \
+- barrier(); \
+-} while (0)
+-
+-#define xen_irq_enable() \
+-do { \
+- vcpu_info_t *_vcpu; \
+- barrier(); \
+- _vcpu = current_vcpu_info(); \
+- _vcpu->evtchn_upcall_mask = 0; \
+- barrier(); /* unmask then check (avoid races) */ \
+- if (unlikely(_vcpu->evtchn_upcall_pending)) \
+- force_evtchn_callback(); \
+-} while (0)
+-
+-void xen_safe_halt(void);
+-
+-void xen_halt(void);
+-
+-/*
+- * The use of 'barrier' in the following reflects their use as local-lock
+- * operations. Reentrancy must be prevented (e.g., __cli()) /before/ following
+- * critical operations are executed. All critical operations must complete
+- * /before/ reentrancy is permitted (e.g., __sti()). Alpha architecture also
+- * includes these barriers, for example.
+- */
+-
+-#define __raw_local_save_flags() xen_save_fl()
+-
+-#define raw_local_irq_restore(flags) xen_restore_fl(flags)
+-
+-#define raw_local_irq_disable() xen_irq_disable()
+-
+-#define raw_local_irq_enable() xen_irq_enable()
+-
+-/*
+- * Used in the idle loop; sti takes one instruction cycle
+- * to complete:
+- */
+-static inline void raw_safe_halt(void)
+-{
+- xen_safe_halt();
+-}
+-
+-/*
+- * Used when interrupts are already enabled or to
+- * shutdown the processor:
+- */
+-static inline void halt(void)
+-{
+- xen_halt();
+-}
+-
+-/*
+- * For spinlocks, etc:
+- */
+-#define __raw_local_irq_save() \
+-({ \
+- unsigned long flags = __raw_local_save_flags(); \
+- \
+- raw_local_irq_disable(); \
+- \
+- flags; \
+-})
+-
+-#else
+-/* Offsets into shared_info_t. */
+-#define evtchn_upcall_pending /* 0 */
+-#define evtchn_upcall_mask 1
+-
+-#define sizeof_vcpu_shift 6
+-
+-#ifdef CONFIG_SMP
+-#define GET_VCPU_INFO movl TI_cpu(%ebp),%esi ; \
+- shl $sizeof_vcpu_shift,%esi ; \
+- addl HYPERVISOR_shared_info,%esi
+-#else
+-#define GET_VCPU_INFO movl HYPERVISOR_shared_info,%esi
+-#endif
+-
+-#define __DISABLE_INTERRUPTS movb $1,evtchn_upcall_mask(%esi)
+-#define __ENABLE_INTERRUPTS movb $0,evtchn_upcall_mask(%esi)
+-#define __TEST_PENDING testb $0xFF,evtchn_upcall_pending(%esi)
+-#define DISABLE_INTERRUPTS(clb) GET_VCPU_INFO ; \
+- __DISABLE_INTERRUPTS
+-#define ENABLE_INTERRUPTS(clb) GET_VCPU_INFO ; \
+- __ENABLE_INTERRUPTS
+-#define ENABLE_INTERRUPTS_SYSEXIT __ENABLE_INTERRUPTS ; \
+-sysexit_scrit: /**** START OF SYSEXIT CRITICAL REGION ****/ ; \
+- __TEST_PENDING ; \
+- jnz 14f /* process more events if necessary... */ ; \
+- movl PT_ESI(%esp), %esi ; \
+- sysexit ; \
+-14: __DISABLE_INTERRUPTS ; \
+- TRACE_IRQS_OFF ; \
+-sysexit_ecrit: /**** END OF SYSEXIT CRITICAL REGION ****/ ; \
+- push %esp ; \
+- call evtchn_do_upcall ; \
+- add $4,%esp ; \
+- jmp ret_from_intr
+-#define INTERRUPT_RETURN iret
+-#endif /* __ASSEMBLY__ */
+-
+-#ifndef __ASSEMBLY__
+-#define raw_local_save_flags(flags) \
+- do { (flags) = __raw_local_save_flags(); } while (0)
+-
+-#define raw_local_irq_save(flags) \
+- do { (flags) = __raw_local_irq_save(); } while (0)
+-
+-static inline int raw_irqs_disabled_flags(unsigned long flags)
+-{
+- return (flags != 0);
+-}
+-
+-#define raw_irqs_disabled() \
+-({ \
+- unsigned long flags = __raw_local_save_flags(); \
+- \
+- raw_irqs_disabled_flags(flags); \
+-})
+-
+-/*
+- * makes the traced hardirq state match with the machine state
+- *
+- * should be a rarely used function, only in places where its
+- * otherwise impossible to know the irq state, like in traps.
+- */
+-static inline void trace_hardirqs_fixup_flags(unsigned long flags)
+-{
+- if (raw_irqs_disabled_flags(flags))
+- trace_hardirqs_off();
+- else
+- trace_hardirqs_on();
+-}
+-
+-#define trace_hardirqs_fixup() \
+- trace_hardirqs_fixup_flags(__raw_local_save_flags())
+-#endif /* __ASSEMBLY__ */
+-
+-/*
+- * Do the CPU's IRQ-state tracing from assembly code. We call a
+- * C function, so save all the C-clobbered registers:
+- */
+-#ifdef CONFIG_TRACE_IRQFLAGS
+-
+-# define TRACE_IRQS_ON \
+- pushl %eax; \
+- pushl %ecx; \
+- pushl %edx; \
+- call trace_hardirqs_on; \
+- popl %edx; \
+- popl %ecx; \
+- popl %eax;
+-
+-# define TRACE_IRQS_OFF \
+- pushl %eax; \
+- pushl %ecx; \
+- pushl %edx; \
+- call trace_hardirqs_off; \
+- popl %edx; \
+- popl %ecx; \
+- popl %eax;
+-
+-#else
+-# define TRACE_IRQS_ON
+-# define TRACE_IRQS_OFF
+-#endif
+-
+-#ifdef CONFIG_DEBUG_LOCK_ALLOC
+-# define LOCKDEP_SYS_EXIT \
+- pushl %eax; \
+- pushl %ecx; \
+- pushl %edx; \
+- call lockdep_sys_exit; \
+- popl %edx; \
+- popl %ecx; \
+- popl %eax;
+-#else
+-# define LOCKDEP_SYS_EXIT
+-#endif
+-
+-#endif
+--- a/include/asm-x86/mach-xen/asm/irqflags_64.h
++++ /dev/null
+@@ -1,178 +0,0 @@
+-/*
+- * include/asm-x86_64/irqflags.h
+- *
+- * IRQ flags handling
+- *
+- * This file gets included from lowlevel asm headers too, to provide
+- * wrapped versions of the local_irq_*() APIs, based on the
+- * raw_local_irq_*() functions from the lowlevel headers.
+- */
+-#ifndef _ASM_IRQFLAGS_H
+-#define _ASM_IRQFLAGS_H
+-#include <asm/processor-flags.h>
+-
+-#ifndef __ASSEMBLY__
+-/*
+- * Interrupt control:
+- */
+-
+-/*
+- * The use of 'barrier' in the following reflects their use as local-lock
+- * operations. Reentrancy must be prevented (e.g., __cli()) /before/ following
+- * critical operations are executed. All critical operations must complete
+- * /before/ reentrancy is permitted (e.g., __sti()). Alpha architecture also
+- * includes these barriers, for example.
+- */
+-
+-#define __raw_local_save_flags() (current_vcpu_info()->evtchn_upcall_mask)
+-
+-#define raw_local_save_flags(flags) \
+- do { (flags) = __raw_local_save_flags(); } while (0)
+-
+-#define raw_local_irq_restore(x) \
+-do { \
+- vcpu_info_t *_vcpu; \
+- barrier(); \
+- _vcpu = current_vcpu_info(); \
+- if ((_vcpu->evtchn_upcall_mask = (x)) == 0) { \
+- barrier(); /* unmask then check (avoid races) */ \
+- if ( unlikely(_vcpu->evtchn_upcall_pending) ) \
+- force_evtchn_callback(); \
+- } \
+-} while (0)
+-
+-#ifdef CONFIG_X86_VSMP
+-
+-/*
+- * Interrupt control for the VSMP architecture:
+- */
+-
+-static inline void raw_local_irq_disable(void)
+-{
+- unsigned long flags = __raw_local_save_flags();
+-
+- raw_local_irq_restore((flags & ~X86_EFLAGS_IF) | X86_EFLAGS_AC);
+-}
+-
+-static inline void raw_local_irq_enable(void)
+-{
+- unsigned long flags = __raw_local_save_flags();
+-
+- raw_local_irq_restore((flags | X86_EFLAGS_IF) & (~X86_EFLAGS_AC));
+-}
+-
+-static inline int raw_irqs_disabled_flags(unsigned long flags)
+-{
+- return !(flags & X86_EFLAGS_IF) || (flags & X86_EFLAGS_AC);
+-}
+-
+-#else /* CONFIG_X86_VSMP */
+-
+-#define raw_local_irq_disable() \
+-do { \
+- current_vcpu_info()->evtchn_upcall_mask = 1; \
+- barrier(); \
+-} while (0)
+-
+-#define raw_local_irq_enable() \
+-do { \
+- vcpu_info_t *_vcpu; \
+- barrier(); \
+- _vcpu = current_vcpu_info(); \
+- _vcpu->evtchn_upcall_mask = 0; \
+- barrier(); /* unmask then check (avoid races) */ \
+- if ( unlikely(_vcpu->evtchn_upcall_pending) ) \
+- force_evtchn_callback(); \
+-} while (0)
+-
+-static inline int raw_irqs_disabled_flags(unsigned long flags)
+-{
+- return (flags != 0);
+-}
+-
+-#endif
+-
+-/*
+- * For spinlocks, etc.:
+- */
+-
+-#define __raw_local_irq_save() \
+-({ \
+- unsigned long flags = __raw_local_save_flags(); \
+- \
+- raw_local_irq_disable(); \
+- \
+- flags; \
+-})
+-
+-#define raw_local_irq_save(flags) \
+- do { (flags) = __raw_local_irq_save(); } while (0)
+-
+-#define raw_irqs_disabled() \
+-({ \
+- unsigned long flags = __raw_local_save_flags(); \
+- \
+- raw_irqs_disabled_flags(flags); \
+-})
+-
+-/*
+- * makes the traced hardirq state match with the machine state
+- *
+- * should be a rarely used function, only in places where its
+- * otherwise impossible to know the irq state, like in traps.
+- */
+-static inline void trace_hardirqs_fixup_flags(unsigned long flags)
+-{
+- if (raw_irqs_disabled_flags(flags))
+- trace_hardirqs_off();
+- else
+- trace_hardirqs_on();
+-}
+-
+-#define trace_hardirqs_fixup() \
+- trace_hardirqs_fixup_flags(__raw_local_save_flags())
+-/*
+- * Used in the idle loop; sti takes one instruction cycle
+- * to complete:
+- */
+-void xen_safe_halt(void);
+-static inline void raw_safe_halt(void)
+-{
+- xen_safe_halt();
+-}
+-
+-/*
+- * Used when interrupts are already enabled or to
+- * shutdown the processor:
+- */
+-void xen_halt(void);
+-static inline void halt(void)
+-{
+- xen_halt();
+-}
+-
+-#else /* __ASSEMBLY__: */
+-# ifdef CONFIG_TRACE_IRQFLAGS
+-# define TRACE_IRQS_ON call trace_hardirqs_on_thunk
+-# define TRACE_IRQS_OFF call trace_hardirqs_off_thunk
+-# else
+-# define TRACE_IRQS_ON
+-# define TRACE_IRQS_OFF
+-# endif
+-# ifdef CONFIG_DEBUG_LOCK_ALLOC
+-# define LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk
+-# define LOCKDEP_SYS_EXIT_IRQ \
+- TRACE_IRQS_ON; \
+- sti; \
+- SAVE_REST; \
+- LOCKDEP_SYS_EXIT; \
+- RESTORE_REST; \
+- cli; \
+- TRACE_IRQS_OFF;
+-# else
+-# define LOCKDEP_SYS_EXIT
+-# define LOCKDEP_SYS_EXIT_IRQ
+-# endif
+-#endif
+-
+-#endif
+--- a/include/asm-x86/mach-xen/asm/irqflags.h
++++ b/include/asm-x86/mach-xen/asm/irqflags.h
+@@ -1,5 +1,247 @@
+-#ifdef CONFIG_X86_32
+-# include "irqflags_32.h"
++#ifndef _X86_IRQFLAGS_H_
++#define _X86_IRQFLAGS_H_
++
++#include <asm/processor-flags.h>
++
++#ifndef __ASSEMBLY__
++/*
++ * The use of 'barrier' in the following reflects their use as local-lock
++ * operations. Reentrancy must be prevented (e.g., __cli()) /before/ following
++ * critical operations are executed. All critical operations must complete
++ * /before/ reentrancy is permitted (e.g., __sti()). Alpha architecture also
++ * includes these barriers, for example.
++ */
++
++#define xen_save_fl(void) (current_vcpu_info()->evtchn_upcall_mask)
++
++#define xen_restore_fl(f) \
++do { \
++ vcpu_info_t *_vcpu; \
++ barrier(); \
++ _vcpu = current_vcpu_info(); \
++ if ((_vcpu->evtchn_upcall_mask = (f)) == 0) { \
++ barrier(); /* unmask then check (avoid races) */\
++ if (unlikely(_vcpu->evtchn_upcall_pending)) \
++ force_evtchn_callback(); \
++ } \
++} while (0)
++
++#define xen_irq_disable() \
++do { \
++ current_vcpu_info()->evtchn_upcall_mask = 1; \
++ barrier(); \
++} while (0)
++
++#define xen_irq_enable() \
++do { \
++ vcpu_info_t *_vcpu; \
++ barrier(); \
++ _vcpu = current_vcpu_info(); \
++ _vcpu->evtchn_upcall_mask = 0; \
++ barrier(); /* unmask then check (avoid races) */ \
++ if (unlikely(_vcpu->evtchn_upcall_pending)) \
++ force_evtchn_callback(); \
++} while (0)
++
++void xen_safe_halt(void);
++
++void xen_halt(void);
++
++#define __raw_local_save_flags() xen_save_fl()
++
++#define raw_local_irq_restore(flags) xen_restore_fl(flags)
++
++#define raw_local_irq_disable() xen_irq_disable()
++
++#define raw_local_irq_enable() xen_irq_enable()
++
++/*
++ * Used in the idle loop; sti takes one instruction cycle
++ * to complete:
++ */
++static inline void raw_safe_halt(void)
++{
++ xen_safe_halt();
++}
++
++/*
++ * Used when interrupts are already enabled or to
++ * shutdown the processor:
++ */
++static inline void halt(void)
++{
++ xen_halt();
++}
++
++/*
++ * For spinlocks, etc:
++ */
++#define __raw_local_irq_save() \
++({ \
++ unsigned long flags = __raw_local_save_flags(); \
++ \
++ raw_local_irq_disable(); \
++ \
++ flags; \
++})
+ #else
+-# include "irqflags_64.h"
++
++/* Offsets into shared_info_t. */
++#define evtchn_upcall_pending /* 0 */
++#define evtchn_upcall_mask 1
++
++#define sizeof_vcpu_shift 6
++
++#ifdef CONFIG_X86_64
++# define __REG_si %rsi
++# define __CPU_num %gs:pda_cpunumber
++#else
++# define __REG_si %esi
++# define __CPU_num TI_cpu(%ebp)
++#endif
++
++#ifdef CONFIG_SMP
++#define GET_VCPU_INFO movl __CPU_num,%esi ; \
++ shl $sizeof_vcpu_shift,%esi ; \
++ add HYPERVISOR_shared_info,__REG_si
++#else
++#define GET_VCPU_INFO mov HYPERVISOR_shared_info,__REG_si
++#endif
++
++#define __DISABLE_INTERRUPTS movb $1,evtchn_upcall_mask(__REG_si)
++#define __ENABLE_INTERRUPTS movb $0,evtchn_upcall_mask(__REG_si)
++#define __TEST_PENDING testb $0xFF,evtchn_upcall_pending(__REG_si)
++#define DISABLE_INTERRUPTS(clb) GET_VCPU_INFO ; \
++ __DISABLE_INTERRUPTS
++#define ENABLE_INTERRUPTS(clb) GET_VCPU_INFO ; \
++ __ENABLE_INTERRUPTS
++
++#ifndef CONFIG_X86_64
++#define INTERRUPT_RETURN iret
++#define ENABLE_INTERRUPTS_SYSCALL_RET __ENABLE_INTERRUPTS ; \
++sysexit_scrit: /**** START OF SYSEXIT CRITICAL REGION ****/ ; \
++ __TEST_PENDING ; \
++ jnz 14f /* process more events if necessary... */ ; \
++ movl PT_ESI(%esp), %esi ; \
++ sysexit ; \
++14: __DISABLE_INTERRUPTS ; \
++ TRACE_IRQS_OFF ; \
++sysexit_ecrit: /**** END OF SYSEXIT CRITICAL REGION ****/ ; \
++ push %esp ; \
++ call evtchn_do_upcall ; \
++ add $4,%esp ; \
++ jmp ret_from_intr
++#endif
++
++
++#endif /* __ASSEMBLY__ */
++
++#ifndef __ASSEMBLY__
++#define raw_local_save_flags(flags) \
++ do { (flags) = __raw_local_save_flags(); } while (0)
++
++#define raw_local_irq_save(flags) \
++ do { (flags) = __raw_local_irq_save(); } while (0)
++
++static inline int raw_irqs_disabled_flags(unsigned long flags)
++{
++ return (flags != 0);
++}
++
++#define raw_irqs_disabled() \
++({ \
++ unsigned long flags = __raw_local_save_flags(); \
++ \
++ raw_irqs_disabled_flags(flags); \
++})
++
++/*
++ * makes the traced hardirq state match with the machine state
++ *
++ * should be a rarely used function, only in places where its
++ * otherwise impossible to know the irq state, like in traps.
++ */
++static inline void trace_hardirqs_fixup_flags(unsigned long flags)
++{
++ if (raw_irqs_disabled_flags(flags))
++ trace_hardirqs_off();
++ else
++ trace_hardirqs_on();
++}
++
++#define trace_hardirqs_fixup() \
++ trace_hardirqs_fixup_flags(__raw_local_save_flags())
++
++#else
++
++#ifdef CONFIG_X86_64
++/*
++ * Currently paravirt can't handle swapgs nicely when we
++ * don't have a stack we can rely on (such as a user space
++ * stack). So we either find a way around these or just fault
++ * and emulate if a guest tries to call swapgs directly.
++ *
++ * Either way, this is a good way to document that we don't
++ * have a reliable stack. x86_64 only.
++ */
++#define SWAPGS_UNSAFE_STACK swapgs
++#define ARCH_TRACE_IRQS_ON call trace_hardirqs_on_thunk
++#define ARCH_TRACE_IRQS_OFF call trace_hardirqs_off_thunk
++#define ARCH_LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk
++#define ARCH_LOCKDEP_SYS_EXIT_IRQ \
++ TRACE_IRQS_ON; \
++ ENABLE_INTERRUPTS(CLBR_NONE); \
++ SAVE_REST; \
++ LOCKDEP_SYS_EXIT; \
++ RESTORE_REST; \
++ __DISABLE_INTERRUPTS; \
++ TRACE_IRQS_OFF;
++
++#else
++#define ARCH_TRACE_IRQS_ON \
++ pushl %eax; \
++ pushl %ecx; \
++ pushl %edx; \
++ call trace_hardirqs_on; \
++ popl %edx; \
++ popl %ecx; \
++ popl %eax;
++
++#define ARCH_TRACE_IRQS_OFF \
++ pushl %eax; \
++ pushl %ecx; \
++ pushl %edx; \
++ call trace_hardirqs_off; \
++ popl %edx; \
++ popl %ecx; \
++ popl %eax;
++
++#define ARCH_LOCKDEP_SYS_EXIT \
++ pushl %eax; \
++ pushl %ecx; \
++ pushl %edx; \
++ call lockdep_sys_exit; \
++ popl %edx; \
++ popl %ecx; \
++ popl %eax;
++
++#define ARCH_LOCKDEP_SYS_EXIT_IRQ
++#endif
++
++#ifdef CONFIG_TRACE_IRQFLAGS
++# define TRACE_IRQS_ON ARCH_TRACE_IRQS_ON
++# define TRACE_IRQS_OFF ARCH_TRACE_IRQS_OFF
++#else
++# define TRACE_IRQS_ON
++# define TRACE_IRQS_OFF
++#endif
++#ifdef CONFIG_DEBUG_LOCK_ALLOC
++# define LOCKDEP_SYS_EXIT ARCH_LOCKDEP_SYS_EXIT
++# define LOCKDEP_SYS_EXIT_IRQ ARCH_LOCKDEP_SYS_EXIT_IRQ
++# else
++# define LOCKDEP_SYS_EXIT
++# define LOCKDEP_SYS_EXIT_IRQ
++# endif
++
++#endif /* __ASSEMBLY__ */
+ #endif
+--- a/include/asm-x86/mach-xen/asm/maddr_32.h
++++ b/include/asm-x86/mach-xen/asm/maddr_32.h
+@@ -1,6 +1,7 @@
+ #ifndef _I386_MADDR_H
+ #define _I386_MADDR_H
+
++#include <asm/bug.h>
+ #include <xen/features.h>
+ #include <xen/interface/xen.h>
+
+@@ -151,25 +152,9 @@ static inline paddr_t pte_machine_to_phy
+ phys = (phys << PAGE_SHIFT) | (machine & ~PHYSICAL_PAGE_MASK);
+ return phys;
+ }
+-#endif
+-
+-#ifdef CONFIG_X86_PAE
+-#define __pte_ma(x) ((pte_t) { (x), (maddr_t)(x) >> 32 } )
+-extern unsigned long long __supported_pte_mask;
+-static inline pte_t pfn_pte_ma(unsigned long page_nr, pgprot_t pgprot)
+-{
+- pte_t pte;
+-
+- pte.pte_high = (page_nr >> (32 - PAGE_SHIFT)) | \
+- (pgprot_val(pgprot) >> 32);
+- pte.pte_high &= (__supported_pte_mask >> 32);
+- pte.pte_low = ((page_nr << PAGE_SHIFT) | pgprot_val(pgprot)) & \
+- __supported_pte_mask;
+- return pte;
+-}
+ #else
+-#define __pte_ma(x) ((pte_t) { (x) } )
+-#define pfn_pte_ma(pfn, prot) __pte_ma(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
++#define pte_phys_to_machine phys_to_machine
++#define pte_machine_to_phys machine_to_phys
+ #endif
+
+ #else /* !CONFIG_XEN */
+--- a/include/asm-x86/mach-xen/asm/maddr_64.h
++++ b/include/asm-x86/mach-xen/asm/maddr_64.h
+@@ -1,6 +1,7 @@
+ #ifndef _X86_64_MADDR_H
+ #define _X86_64_MADDR_H
+
++#include <asm/bug.h>
+ #include <xen/features.h>
+ #include <xen/interface/xen.h>
+
+@@ -16,6 +17,7 @@ typedef unsigned long maddr_t;
+ #ifdef CONFIG_XEN
+
+ extern unsigned long *phys_to_machine_mapping;
++extern unsigned long max_mapnr;
+
+ #undef machine_to_phys_mapping
+ extern unsigned long *machine_to_phys_mapping;
+@@ -25,7 +27,7 @@ static inline unsigned long pfn_to_mfn(u
+ {
+ if (xen_feature(XENFEAT_auto_translated_physmap))
+ return pfn;
+- BUG_ON(end_pfn && pfn >= end_pfn);
++ BUG_ON(max_mapnr && pfn >= max_mapnr);
+ return phys_to_machine_mapping[pfn] & ~FOREIGN_FRAME_BIT;
+ }
+
+@@ -33,7 +35,7 @@ static inline int phys_to_machine_mappin
+ {
+ if (xen_feature(XENFEAT_auto_translated_physmap))
+ return 1;
+- BUG_ON(end_pfn && pfn >= end_pfn);
++ BUG_ON(max_mapnr && pfn >= max_mapnr);
+ return (phys_to_machine_mapping[pfn] != INVALID_P2M_ENTRY);
+ }
+
+@@ -45,7 +47,7 @@ static inline unsigned long mfn_to_pfn(u
+ return mfn;
+
+ if (unlikely((mfn >> machine_to_phys_order) != 0))
+- return end_pfn;
++ return max_mapnr;
+
+ /* The array access can fail (e.g., device space beyond end of RAM). */
+ asm (
+@@ -60,7 +62,7 @@ static inline unsigned long mfn_to_pfn(u
+ " .quad 1b,3b\n"
+ ".previous"
+ : "=r" (pfn)
+- : "m" (machine_to_phys_mapping[mfn]), "m" (end_pfn) );
++ : "m" (machine_to_phys_mapping[mfn]), "m" (max_mapnr) );
+
+ return pfn;
+ }
+@@ -88,16 +90,16 @@ static inline unsigned long mfn_to_pfn(u
+ static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
+ {
+ unsigned long pfn = mfn_to_pfn(mfn);
+- if ((pfn < end_pfn)
++ if ((pfn < max_mapnr)
+ && !xen_feature(XENFEAT_auto_translated_physmap)
+ && (phys_to_machine_mapping[pfn] != mfn))
+- return end_pfn; /* force !pfn_valid() */
++ return max_mapnr; /* force !pfn_valid() */
+ return pfn;
+ }
+
+ static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
+ {
+- BUG_ON(end_pfn && pfn >= end_pfn);
++ BUG_ON(max_mapnr && pfn >= max_mapnr);
+ if (xen_feature(XENFEAT_auto_translated_physmap)) {
+ BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY);
+ return;
+@@ -135,9 +137,6 @@ static inline paddr_t pte_machine_to_phy
+ return phys;
+ }
+
+-#define __pte_ma(x) ((pte_t) { (x) } )
+-#define pfn_pte_ma(pfn, prot) __pte_ma((((pfn) << PAGE_SHIFT) | pgprot_val(prot)) & __supported_pte_mask)
+-
+ #else /* !CONFIG_XEN */
+
+ #define pfn_to_mfn(pfn) (pfn)
+--- a/include/asm-x86/mach-xen/asm/mmu_context_32.h
++++ b/include/asm-x86/mach-xen/asm/mmu_context_32.h
+@@ -51,8 +51,6 @@ static inline void __prepare_arch_switch
+ : : "r" (0) );
+ }
+
+-void leave_mm(unsigned long cpu);
+-
+ static inline void switch_mm(struct mm_struct *prev,
+ struct mm_struct *next,
+ struct task_struct *tsk)
+--- a/include/asm-x86/mach-xen/asm/mmu_context_64.h
++++ b/include/asm-x86/mach-xen/asm/mmu_context_64.h
+@@ -62,12 +62,6 @@ extern void mm_pin(struct mm_struct *mm)
+ extern void mm_unpin(struct mm_struct *mm);
+ void mm_pin_all(void);
+
+-static inline void load_cr3(pgd_t *pgd)
+-{
+- asm volatile("movq %0,%%cr3" :: "r" (phys_to_machine(__pa(pgd))) :
+- "memory");
+-}
+-
+ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
+ {
+@@ -97,7 +91,7 @@ static inline void switch_mm(struct mm_s
+ op++;
+
+ if (unlikely(next->context.ldt != prev->context.ldt)) {
+- /* load_LDT_nolock(&next->context, cpu) */
++ /* load_LDT_nolock(&next->context) */
+ op->cmd = MMUEXT_SET_LDT;
+ op->arg1.linear_addr = (unsigned long)next->context.ldt;
+ op->arg2.nr_ents = next->context.size;
+@@ -110,7 +104,7 @@ static inline void switch_mm(struct mm_s
+ else {
+ write_pda(mmu_state, TLBSTATE_OK);
+ if (read_pda(active_mm) != next)
+- out_of_line_bug();
++ BUG();
+ if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
+ /* We were in lazy tlb mode and leave_mm disabled
+ * tlb flush IPI delivery. We must reload CR3
+@@ -118,7 +112,7 @@ static inline void switch_mm(struct mm_s
+ */
+ load_cr3(next->pgd);
+ xen_new_user_pt(__pa(__user_pgd(next->pgd)));
+- load_LDT_nolock(&next->context, cpu);
++ load_LDT_nolock(&next->context);
+ }
+ }
+ #endif
+--- a/include/asm-x86/mach-xen/asm/page_64.h
++++ b/include/asm-x86/mach-xen/asm/page_64.h
+@@ -1,37 +1,9 @@
+ #ifndef _X86_64_PAGE_H
+ #define _X86_64_PAGE_H
+
+-/* #include <linux/string.h> */
+-#ifndef __ASSEMBLY__
+-#include <linux/kernel.h>
+-#include <linux/types.h>
+-#include <asm/bug.h>
+-#endif
+-#include <linux/const.h>
+-#include <xen/interface/xen.h>
+-
+-/*
+- * Need to repeat this here in order to not include pgtable.h (which in turn
+- * depends on definitions made here), but to be able to use the symbolic
+- * below. The preprocessor will warn if the two definitions aren't identical.
+- */
+-#define _PAGE_PRESENT 0x001
+-#define _PAGE_IO 0x200
+-
+-/* PAGE_SHIFT determines the page size */
+-#define PAGE_SHIFT 12
+-#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
+-#define PAGE_MASK (~(PAGE_SIZE-1))
+-
+-/* See Documentation/x86_64/mm.txt for a description of the memory map. */
+-#define __PHYSICAL_MASK_SHIFT 46
+-#define __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1)
+-#define __VIRTUAL_MASK_SHIFT 48
+-#define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
+-
+-#define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
++#define PAGETABLE_LEVELS 4
+
+-#define THREAD_ORDER 1
++#define THREAD_ORDER 1
+ #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
+ #define CURRENT_MASK (~(THREAD_SIZE-1))
+
+@@ -51,106 +23,10 @@
+ #define MCE_STACK 5
+ #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
+
+-#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
+-#define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
+-
+-#define HPAGE_SHIFT PMD_SHIFT
+-#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
+-#define HPAGE_MASK (~(HPAGE_SIZE - 1))
+-#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
+-
+-#ifdef __KERNEL__
+-#ifndef __ASSEMBLY__
+-
+-extern unsigned long end_pfn;
+-
+-#include <asm/maddr.h>
+-
+-void clear_page(void *);
+-void copy_page(void *, void *);
+-
+-#define clear_user_page(page, vaddr, pg) clear_page(page)
+-#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
+-
+-#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
+- alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
+-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+-
+-/*
+- * These are used to make use of C type-checking..
+- */
+-typedef struct { unsigned long pte; } pte_t;
+-typedef struct { unsigned long pmd; } pmd_t;
+-typedef struct { unsigned long pud; } pud_t;
+-typedef struct { unsigned long pgd; } pgd_t;
+-#define PTE_MASK PHYSICAL_PAGE_MASK
+-
+-typedef struct { unsigned long pgprot; } pgprot_t;
+-
+-#define __pte_val(x) ((x).pte)
+-#define pte_val(x) ((__pte_val(x) & (_PAGE_PRESENT|_PAGE_IO)) \
+- == _PAGE_PRESENT ? \
+- pte_machine_to_phys(__pte_val(x)) : \
+- __pte_val(x))
+-
+-#define __pmd_val(x) ((x).pmd)
+-static inline unsigned long pmd_val(pmd_t x)
+-{
+- unsigned long ret = __pmd_val(x);
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (ret) ret = pte_machine_to_phys(ret) | _PAGE_PRESENT;
+-#else
+- if (ret & _PAGE_PRESENT) ret = pte_machine_to_phys(ret);
+-#endif
+- return ret;
+-}
+-
+-#define __pud_val(x) ((x).pud)
+-static inline unsigned long pud_val(pud_t x)
+-{
+- unsigned long ret = __pud_val(x);
+- if (ret & _PAGE_PRESENT) ret = pte_machine_to_phys(ret);
+- return ret;
+-}
+-
+-#define __pgd_val(x) ((x).pgd)
+-static inline unsigned long pgd_val(pgd_t x)
+-{
+- unsigned long ret = __pgd_val(x);
+- if (ret & _PAGE_PRESENT) ret = pte_machine_to_phys(ret);
+- return ret;
+-}
+-
+-#define pgprot_val(x) ((x).pgprot)
+-
+-static inline pte_t __pte(unsigned long x)
+-{
+- if ((x & (_PAGE_PRESENT|_PAGE_IO)) == _PAGE_PRESENT)
+- x = pte_phys_to_machine(x);
+- return ((pte_t) { (x) });
+-}
+-
+-static inline pmd_t __pmd(unsigned long x)
+-{
+- if (x & _PAGE_PRESENT) x = pte_phys_to_machine(x);
+- return ((pmd_t) { (x) });
+-}
+-
+-static inline pud_t __pud(unsigned long x)
+-{
+- if (x & _PAGE_PRESENT) x = pte_phys_to_machine(x);
+- return ((pud_t) { (x) });
+-}
+-
+-static inline pgd_t __pgd(unsigned long x)
+-{
+- if (x & _PAGE_PRESENT) x = pte_phys_to_machine(x);
+- return ((pgd_t) { (x) });
+-}
+-
+-#define __pgprot(x) ((pgprot_t) { (x) } )
++#define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
++#define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
+
+-#endif /* !__ASSEMBLY__ */
++#define __PAGE_OFFSET _AC(0xffff880000000000, UL)
+
+ #define __PHYSICAL_START CONFIG_PHYSICAL_START
+ #define __KERNEL_ALIGN 0x200000
+@@ -166,52 +42,58 @@ static inline pgd_t __pgd(unsigned long
+
+ #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
+ #define __START_KERNEL_map _AC(0xffffffff80000000, UL)
+-#define __PAGE_OFFSET _AC(0xffff880000000000, UL)
+
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ #undef LOAD_OFFSET
+ #define LOAD_OFFSET 0
+ #endif
+
+-/* to align the pointer to the (next) page boundary */
+-#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+-
+-#define KERNEL_TEXT_SIZE (40*1024*1024)
+-#define KERNEL_TEXT_START _AC(0xffffffff80000000, UL)
++/* See Documentation/x86_64/mm.txt for a description of the memory map. */
++#define __PHYSICAL_MASK_SHIFT 46
++#define __VIRTUAL_MASK_SHIFT 48
+
+-#define PAGE_OFFSET __PAGE_OFFSET
++/*
++ * Kernel image size is limited to 128 MB (see level2_kernel_pgt in
++ * arch/x86/kernel/head_64.S), and it is mapped here:
++ */
++#define KERNEL_IMAGE_SIZE (128*1024*1024)
++#define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL)
+
+ #ifndef __ASSEMBLY__
++void clear_page(void *page);
++void copy_page(void *to, void *from);
++
++extern unsigned long end_pfn;
++extern unsigned long end_pfn_map;
++
+ static inline unsigned long __phys_addr(unsigned long x)
+ {
+- return x - (x >= __START_KERNEL_map ? __START_KERNEL_map : PAGE_OFFSET);
++ return x - (x >= __START_KERNEL_map ? __START_KERNEL_map : __PAGE_OFFSET);
+ }
+-#endif
+
+-#define __pa(x) __phys_addr((unsigned long)(x))
+-#define __pa_symbol(x) __phys_addr((unsigned long)(x))
++#define __phys_reloc_hide(x) (x)
+
+-#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
+-#define __boot_va(x) __va(x)
+-#define __boot_pa(x) __pa(x)
+-#ifdef CONFIG_FLATMEM
+-#define pfn_valid(pfn) ((pfn) < end_pfn)
+-#endif
++/*
++ * These are used to make use of C type-checking..
++ */
++typedef unsigned long pteval_t;
++typedef unsigned long pmdval_t;
++typedef unsigned long pudval_t;
++typedef unsigned long pgdval_t;
++typedef unsigned long pgprotval_t;
++typedef unsigned long phys_addr_t;
+
+-#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+-#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
+-
+-#define VM_DATA_DEFAULT_FLAGS \
+- (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
+- VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
++typedef struct page *pgtable_t;
++
++typedef union { pteval_t pte; unsigned int pte_low; } pte_t;
+
+-#define __HAVE_ARCH_GATE_AREA 1
+ #define vmemmap ((struct page *)VMEMMAP_START)
+
+-#include <asm-generic/memory_model.h>
+-#include <asm-generic/page.h>
++#endif /* !__ASSEMBLY__ */
++
++#ifdef CONFIG_FLATMEM
++#define pfn_valid(pfn) ((pfn) < max_mapnr)
++#endif
+
+-#endif /* __KERNEL__ */
+
+ #endif /* _X86_64_PAGE_H */
+--- a/include/asm-x86/mach-xen/asm/page.h
++++ b/include/asm-x86/mach-xen/asm/page.h
+@@ -1,13 +1,231 @@
++#ifndef _ASM_X86_PAGE_H
++#define _ASM_X86_PAGE_H
++
++#include <linux/const.h>
++
++/* PAGE_SHIFT determines the page size */
++#define PAGE_SHIFT 12
++#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
++#define PAGE_MASK (~(PAGE_SIZE-1))
++
+ #ifdef __KERNEL__
+-# ifdef CONFIG_X86_32
+-# include "page_32.h"
+-# else
+-# include "page_64.h"
+-# endif
++
++/*
++ * Need to repeat this here in order to not include pgtable.h (which in turn
++ * depends on definitions made here), but to be able to use the symbolics
++ * below. The preprocessor will warn if the two definitions aren't identical.
++ */
++#define _PAGE_BIT_PRESENT 0
++#define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT)
++#define _PAGE_BIT_IO 9
++#define _PAGE_IO (_AC(1, L)<<_PAGE_BIT_IO)
++
++#define PHYSICAL_PAGE_MASK (~(_AT(phys_addr_t, PAGE_SIZE) - 1) & __PHYSICAL_MASK)
++#define PTE_MASK _AT(pteval_t, PHYSICAL_PAGE_MASK)
++
++#define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT)
++#define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1))
++
++#define HPAGE_SHIFT PMD_SHIFT
++#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
++#define HPAGE_MASK (~(HPAGE_SIZE - 1))
++#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
++
++/* to align the pointer to the (next) page boundary */
++#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
++
++#define __PHYSICAL_MASK _AT(phys_addr_t, (_AC(1,ULL) << __PHYSICAL_MASK_SHIFT) - 1)
++#define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
++
++#ifndef __ASSEMBLY__
++#include <linux/types.h>
++#endif
++
++#ifdef CONFIG_X86_64
++#include <asm/page_64.h>
++#define max_pfn_mapped end_pfn_map
++#else
++#include <asm/page_32.h>
++#define max_pfn_mapped max_low_pfn
++#endif /* CONFIG_X86_64 */
++
++#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
++
++#define VM_DATA_DEFAULT_FLAGS \
++ (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
++ VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
++
++
++#ifndef __ASSEMBLY__
++
++extern int page_is_ram(unsigned long pagenr);
++
++struct page;
++
++static inline void clear_user_page(void *page, unsigned long vaddr,
++ struct page *pg)
++{
++ clear_page(page);
++}
++
++static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
++ struct page *topage)
++{
++ copy_page(to, from);
++}
++
++#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
++ alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
++#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
++
++typedef struct { pgprotval_t pgprot; } pgprot_t;
++
++#define pgprot_val(x) ((x).pgprot)
++#define __pgprot(x) ((pgprot_t) { (x) } )
++
++#include <asm/maddr.h>
++
++typedef struct { pgdval_t pgd; } pgd_t;
++
++#define __pgd_ma(x) ((pgd_t) { (x) } )
++static inline pgd_t xen_make_pgd(pgdval_t val)
++{
++ if (val & _PAGE_PRESENT)
++ val = pte_phys_to_machine(val);
++ return (pgd_t) { val };
++}
++
++#define __pgd_val(x) ((x).pgd)
++static inline pgdval_t xen_pgd_val(pgd_t pgd)
++{
++ pgdval_t ret = __pgd_val(pgd);
++#if PAGETABLE_LEVELS == 2 && CONFIG_XEN_COMPAT <= 0x030002
++ if (ret)
++ ret = machine_to_phys(ret) | _PAGE_PRESENT;
++#else
++ if (ret & _PAGE_PRESENT)
++ ret = pte_machine_to_phys(ret);
++#endif
++ return ret;
++}
++
++#if PAGETABLE_LEVELS >= 3
++#if PAGETABLE_LEVELS == 4
++typedef struct { pudval_t pud; } pud_t;
++
++#define __pud_ma(x) ((pud_t) { (x) } )
++static inline pud_t xen_make_pud(pudval_t val)
++{
++ if (val & _PAGE_PRESENT)
++ val = pte_phys_to_machine(val);
++ return (pud_t) { val };
++}
++
++#define __pud_val(x) ((x).pud)
++static inline pudval_t xen_pud_val(pud_t pud)
++{
++ pudval_t ret = __pud_val(pud);
++ if (ret & _PAGE_PRESENT)
++ ret = pte_machine_to_phys(ret);
++ return ret;
++}
++#else /* PAGETABLE_LEVELS == 3 */
++#include <asm-generic/pgtable-nopud.h>
++
++#define __pud_val(x) __pgd_val((x).pgd)
++static inline pudval_t xen_pud_val(pud_t pud)
++{
++ return xen_pgd_val(pud.pgd);
++}
++#endif /* PAGETABLE_LEVELS == 4 */
++
++typedef struct { pmdval_t pmd; } pmd_t;
++
++#define __pmd_ma(x) ((pmd_t) { (x) } )
++static inline pmd_t xen_make_pmd(pmdval_t val)
++{
++ if (val & _PAGE_PRESENT)
++ val = pte_phys_to_machine(val);
++ return (pmd_t) { val };
++}
++
++#define __pmd_val(x) ((x).pmd)
++static inline pmdval_t xen_pmd_val(pmd_t pmd)
++{
++ pmdval_t ret = __pmd_val(pmd);
++#if CONFIG_XEN_COMPAT <= 0x030002
++ if (ret)
++ ret = pte_machine_to_phys(ret) | _PAGE_PRESENT;
+ #else
+-# ifdef __i386__
+-# include "page_32.h"
+-# else
+-# include "page_64.h"
+-# endif
++ if (ret & _PAGE_PRESENT)
++ ret = pte_machine_to_phys(ret);
++#endif
++ return ret;
++}
++#else /* PAGETABLE_LEVELS == 2 */
++#include <asm-generic/pgtable-nopmd.h>
++
++#define __pmd_ma(x) ((pmd_t) { .pud.pgd = __pgd_ma(x) } )
++#define __pmd_val(x) __pgd_val((x).pud.pgd)
++static inline pmdval_t xen_pmd_val(pmd_t pmd)
++{
++ return xen_pgd_val(pmd.pud.pgd);
++}
++#endif /* PAGETABLE_LEVELS >= 3 */
++
++#define __pte_ma(x) ((pte_t) { .pte = (x) } )
++static inline pte_t xen_make_pte(pteval_t val)
++{
++ if ((val & (_PAGE_PRESENT|_PAGE_IO)) == _PAGE_PRESENT)
++ val = pte_phys_to_machine(val);
++ return (pte_t) { .pte = val };
++}
++
++#define __pte_val(x) ((x).pte)
++static inline pteval_t xen_pte_val(pte_t pte)
++{
++ pteval_t ret = __pte_val(pte);
++ if ((pte.pte_low & (_PAGE_PRESENT|_PAGE_IO)) == _PAGE_PRESENT)
++ ret = pte_machine_to_phys(ret);
++ return ret;
++}
++
++#define pgd_val(x) xen_pgd_val(x)
++#define __pgd(x) xen_make_pgd(x)
++
++#ifndef __PAGETABLE_PUD_FOLDED
++#define pud_val(x) xen_pud_val(x)
++#define __pud(x) xen_make_pud(x)
++#endif
++
++#ifndef __PAGETABLE_PMD_FOLDED
++#define pmd_val(x) xen_pmd_val(x)
++#define __pmd(x) xen_make_pmd(x)
+ #endif
++
++#define pte_val(x) xen_pte_val(x)
++#define __pte(x) xen_make_pte(x)
++
++#define __pa(x) __phys_addr((unsigned long)(x))
++/* __pa_symbol should be used for C visible symbols.
++ This seems to be the official gcc blessed way to do such arithmetic. */
++#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
++
++#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
++
++#define __boot_va(x) __va(x)
++#define __boot_pa(x) __pa(x)
++
++#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
++#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
++#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
++
++#endif /* __ASSEMBLY__ */
++
++#include <asm-generic/memory_model.h>
++#include <asm-generic/page.h>
++
++#define __HAVE_ARCH_GATE_AREA 1
++
++#endif /* __KERNEL__ */
++#endif /* _ASM_X86_PAGE_H */
+--- a/include/asm-x86/mach-xen/asm/pci_64.h
++++ b/include/asm-x86/mach-xen/asm/pci_64.h
+@@ -26,7 +26,6 @@ extern int (*pci_config_write)(int seg,
+
+
+ extern void pci_iommu_alloc(void);
+-extern int iommu_setup(char *opt);
+
+ /* The PCI address space does equal the physical memory
+ * address space. The networking and block device layers use
+--- a/include/asm-x86/mach-xen/asm/pci.h
++++ b/include/asm-x86/mach-xen/asm/pci.h
+@@ -71,6 +71,7 @@ extern int pci_mmap_page_range(struct pc
+
+
+ #ifdef CONFIG_PCI
++extern void early_quirks(void);
+ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+ enum pci_dma_burst_strategy *strat,
+ unsigned long *strategy_parameter)
+@@ -78,9 +79,10 @@ static inline void pci_dma_burst_advice(
+ *strat = PCI_DMA_BURST_INFINITY;
+ *strategy_parameter = ~0UL;
+ }
++#else
++static inline void early_quirks(void) { }
+ #endif
+
+-
+ #endif /* __KERNEL__ */
+
+ #ifdef CONFIG_X86_32
+@@ -95,6 +97,19 @@ static inline void pci_dma_burst_advice(
+ /* generic pci stuff */
+ #include <asm-generic/pci.h>
+
++#ifdef CONFIG_NUMA
++/* Returns the node based on pci bus */
++static inline int __pcibus_to_node(struct pci_bus *bus)
++{
++ struct pci_sysdata *sd = bus->sysdata;
++
++ return sd->node;
++}
+
++static inline cpumask_t __pcibus_to_cpumask(struct pci_bus *bus)
++{
++ return node_to_cpumask(__pcibus_to_node(bus));
++}
++#endif
+
+ #endif
+--- a/include/asm-x86/mach-xen/asm/pgalloc_32.h
++++ b/include/asm-x86/mach-xen/asm/pgalloc_32.h
+@@ -3,69 +3,109 @@
+
+ #include <linux/threads.h>
+ #include <linux/mm.h> /* for struct page */
++#include <linux/pagemap.h>
++#include <asm/tlb.h>
++#include <asm-generic/tlb.h>
+ #include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
+
+ #define paravirt_alloc_pt(mm, pfn) do { } while (0)
+-#define paravirt_alloc_pd(pfn) do { } while (0)
+-#define paravirt_alloc_pd(pfn) do { } while (0)
++#define paravirt_alloc_pd(mm, pfn) do { } while (0)
+ #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
+ #define paravirt_release_pt(pfn) do { } while (0)
+ #define paravirt_release_pd(pfn) do { } while (0)
+
+-#define pmd_populate_kernel(mm, pmd, pte) \
+-do { \
+- paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \
+- set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \
+-} while (0)
+-
+-#define pmd_populate(mm, pmd, pte) \
+-do { \
+- unsigned long pfn = page_to_pfn(pte); \
+- paravirt_alloc_pt(mm, pfn); \
+- if (PagePinned(virt_to_page((mm)->pgd))) { \
+- if (!PageHighMem(pte)) \
+- BUG_ON(HYPERVISOR_update_va_mapping( \
+- (unsigned long)__va(pfn << PAGE_SHIFT), \
+- pfn_pte(pfn, PAGE_KERNEL_RO), 0)); \
+- else if (!test_and_set_bit(PG_pinned, &pte->flags)) \
+- kmap_flush_unused(); \
+- set_pmd(pmd, \
+- __pmd(_PAGE_TABLE + ((paddr_t)pfn << PAGE_SHIFT))); \
+- } else \
+- *(pmd) = __pmd(_PAGE_TABLE + ((paddr_t)pfn << PAGE_SHIFT)); \
+-} while (0)
++static inline void pmd_populate_kernel(struct mm_struct *mm,
++ pmd_t *pmd, pte_t *pte)
++{
++ paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT);
++ set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
++}
++
++static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
++{
++ unsigned long pfn = page_to_pfn(pte);
++
++ paravirt_alloc_pt(mm, pfn);
++ if (PagePinned(virt_to_page(mm->pgd))) {
++ if (!PageHighMem(pte))
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, PAGE_KERNEL_RO), 0));
++ else if (!test_and_set_bit(PG_pinned, &pte->flags))
++ kmap_flush_unused();
++ set_pmd(pmd, __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
++ } else
++ *pmd = __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE);
++}
++#define pmd_pgtable(pmd) pmd_page(pmd)
+
+ /*
+ * Allocate and free page tables.
+ */
++extern void pgd_test_and_unpin(pgd_t *);
+ extern pgd_t *pgd_alloc(struct mm_struct *);
+-extern void pgd_free(pgd_t *pgd);
++extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
+
+ extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
+-extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
++extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
+
+-static inline void pte_free_kernel(pte_t *pte)
++static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+ {
+ make_lowmem_page_writable(pte, XENFEAT_writable_page_tables);
+ free_page((unsigned long)pte);
+ }
+
+-extern void pte_free(struct page *pte);
++extern void __pte_free(pgtable_t);
++static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
++{
++ __pte_free(pte);
++}
++
+
+-#define __pte_free_tlb(tlb,pte) \
+-do { \
+- paravirt_release_pt(page_to_pfn(pte)); \
+- tlb_remove_page((tlb),(pte)); \
+-} while (0)
++extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
+
+ #ifdef CONFIG_X86_PAE
+ /*
+ * In the PAE case we free the pmds as part of the pgd.
+ */
+-#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
+-#define pmd_free(x) do { } while (0)
+-#define __pmd_free_tlb(tlb,x) do { } while (0)
+-#define pud_populate(mm, pmd, pte) BUG()
+-#endif
++extern pmd_t *pmd_alloc_one(struct mm_struct *, unsigned long);
++
++extern void __pmd_free(pgtable_t);
++static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
++{
++ BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
++ __pmd_free(virt_to_page(pmd));
++}
++
++extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
++
++static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd)
++{
++ struct page *page = virt_to_page(pmd);
++ unsigned long pfn = page_to_pfn(page);
++
++ paravirt_alloc_pd(mm, pfn);
++
++ /* Note: almost everything apart from _PAGE_PRESENT is
++ reserved at the pmd (PDPT) level. */
++ if (PagePinned(virt_to_page(mm->pgd))) {
++ BUG_ON(PageHighMem(page));
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, PAGE_KERNEL_RO), 0));
++ set_pud(pudp, __pud(__pa(pmd) | _PAGE_PRESENT));
++ } else
++ *pudp = __pud(__pa(pmd) | _PAGE_PRESENT);
++
++ /*
++ * According to Intel App note "TLBs, Paging-Structure Caches,
++ * and Their Invalidation", April 2007, document 317080-001,
++ * section 8.1: in PAE mode we explicitly have to flush the
++ * TLB via cr3 if the top-level pgd is changed...
++ */
++ if (mm == current->active_mm)
++ xen_tlb_flush();
++}
++#endif /* CONFIG_X86_PAE */
+
+ #endif /* _I386_PGALLOC_H */
+--- a/include/asm-x86/mach-xen/asm/pgalloc_64.h
++++ b/include/asm-x86/mach-xen/asm/pgalloc_64.h
+@@ -6,30 +6,13 @@
+ #include <linux/mm.h>
+ #include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
+
+-#include <xen/features.h>
+-void make_page_readonly(void *va, unsigned int feature);
+-void make_page_writable(void *va, unsigned int feature);
+-void make_pages_readonly(void *va, unsigned int nr, unsigned int feature);
+-void make_pages_writable(void *va, unsigned int nr, unsigned int feature);
++pmd_t *early_get_pmd(unsigned long va);
++void early_make_page_readonly(void *va, unsigned int feature);
+
+ #define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
+
+-static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
+-{
+- set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)));
+-}
+-
+-static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
+-{
+- if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)__va(page_to_pfn(pte) << PAGE_SHIFT),
+- pfn_pte(page_to_pfn(pte), PAGE_KERNEL_RO), 0));
+- set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
+- } else {
+- *(pmd) = __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT));
+- }
+-}
++#define pmd_populate_kernel(mm, pmd, pte) \
++ set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
+
+ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+ {
+@@ -63,53 +46,58 @@ static inline void pgd_populate(struct m
+ }
+ }
+
+-extern struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr);
+-extern void pte_free(struct page *pte);
++#define pmd_pgtable(pmd) pmd_page(pmd)
+
+-static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
++static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
+ {
+- struct page *pg;
+-
+- pg = pte_alloc_one(mm, addr);
+- return pg ? page_address(pg) : NULL;
++ if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)__va(page_to_pfn(pte) << PAGE_SHIFT),
++ pfn_pte(page_to_pfn(pte), PAGE_KERNEL_RO), 0));
++ set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
++ } else {
++ *(pmd) = __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT));
++ }
+ }
+
+-static inline void pmd_free(pmd_t *pmd)
++extern void __pmd_free(pgtable_t);
++static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+ {
+ BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
+- pte_free(virt_to_page(pmd));
++ __pmd_free(virt_to_page(pmd));
+ }
+
++extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr);
++
+ static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
+ {
+- struct page *pg;
+-
+- pg = pte_alloc_one(mm, addr);
+- return pg ? page_address(pg) : NULL;
++ return (pud_t *)pmd_alloc_one(mm, addr);
+ }
+
+-static inline void pud_free(pud_t *pud)
++static inline void pud_free(struct mm_struct *mm, pud_t *pud)
+ {
+ BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
+- pte_free(virt_to_page(pud));
++ __pmd_free(virt_to_page(pud));
+ }
+
+ static inline void pgd_list_add(pgd_t *pgd)
+ {
+ struct page *page = virt_to_page(pgd);
++ unsigned long flags;
+
+- spin_lock(&pgd_lock);
++ spin_lock_irqsave(&pgd_lock, flags);
+ list_add(&page->lru, &pgd_list);
+- spin_unlock(&pgd_lock);
++ spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+
+ static inline void pgd_list_del(pgd_t *pgd)
+ {
+ struct page *page = virt_to_page(pgd);
++ unsigned long flags;
+
+- spin_lock(&pgd_lock);
++ spin_lock_irqsave(&pgd_lock, flags);
+ list_del(&page->lru);
+- spin_unlock(&pgd_lock);
++ spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+
+ extern void pgd_test_and_unpin(pgd_t *);
+@@ -145,7 +133,7 @@ static inline pgd_t *pgd_alloc(struct mm
+ return pgd;
+ }
+
+-static inline void pgd_free(pgd_t *pgd)
++static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+ {
+ pgd_test_and_unpin(pgd);
+ pgd_list_del(pgd);
+@@ -161,17 +149,30 @@ static inline pte_t *pte_alloc_one_kerne
+ return pte;
+ }
+
++extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
++
+ /* Should really implement gc for free page table pages. This could be
+ done with a reference count in struct page. */
+
+-static inline void pte_free_kernel(pte_t *pte)
++static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+ {
+ BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
+ make_page_writable(pte, XENFEAT_writable_page_tables);
+ free_page((unsigned long)pte);
+ }
+
+-#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
++extern void __pte_free(pgtable_t);
++static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
++{
++ __pte_free(pte);
++}
++
++#define __pte_free_tlb(tlb,pte) \
++do { \
++ pgtable_page_dtor((pte)); \
++ tlb_remove_page((tlb), (pte)); \
++} while (0)
++
+ #define __pmd_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
+ #define __pud_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
+
+--- a/include/asm-x86/mach-xen/asm/pgtable_32.h
++++ b/include/asm-x86/mach-xen/asm/pgtable_32.h
+@@ -1,8 +1,6 @@
+ #ifndef _I386_PGTABLE_H
+ #define _I386_PGTABLE_H
+
+-#include <asm/hypervisor.h>
+-
+ /*
+ * The Linux memory management assumes a three-level page table setup. On
+ * the i386, we use that, but "fold" the mid level into the top-level page
+@@ -25,20 +23,10 @@
+
+ struct vm_area_struct;
+
+-/*
+- * ZERO_PAGE is a global shared page that is always zero: used
+- * for zero-mapped memory areas etc..
+- */
+-#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+-extern unsigned long empty_zero_page[1024];
+ extern pgd_t *swapper_pg_dir;
+-extern struct kmem_cache *pmd_cache;
+-extern spinlock_t pgd_lock;
+-extern struct page *pgd_list;
+-void check_pgt_cache(void);
+
+-void pmd_ctor(struct kmem_cache *, void *);
+-void pgtable_cache_init(void);
++static inline void pgtable_cache_init(void) { }
++static inline void check_pgt_cache(void) { }
+ void paging_init(void);
+
+
+@@ -58,16 +46,9 @@ void paging_init(void);
+ #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
+ #define PGDIR_MASK (~(PGDIR_SIZE-1))
+
+-#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
+-#define FIRST_USER_ADDRESS 0
+-
+ #define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT)
+ #define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS)
+
+-#define TWOLEVEL_PGDIR_SHIFT 22
+-#define BOOT_USER_PGD_PTRS (__PAGE_OFFSET >> TWOLEVEL_PGDIR_SHIFT)
+-#define BOOT_KERNEL_PGD_PTRS (1024-BOOT_USER_PGD_PTRS)
+-
+ /* Just any arbitrary offset to the start of the vmalloc VM area: the
+ * current 8MB value just means that there will be a 8MB "hole" after the
+ * physical memory until the kernel virtual memory starts. That means that
+@@ -78,121 +59,19 @@ void paging_init(void);
+ #define VMALLOC_OFFSET (8*1024*1024)
+ #define VMALLOC_START (((unsigned long) high_memory + \
+ 2*VMALLOC_OFFSET-1) & ~(VMALLOC_OFFSET-1))
+-#ifdef CONFIG_HIGHMEM
+-# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
+-#else
+-# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
+-#endif
+-
+-/*
+- * _PAGE_PSE set in the page directory entry just means that
+- * the page directory entry points directly to a 4MB-aligned block of
+- * memory.
+- */
+-#define _PAGE_BIT_PRESENT 0
+-#define _PAGE_BIT_RW 1
+-#define _PAGE_BIT_USER 2
+-#define _PAGE_BIT_PWT 3
+-#define _PAGE_BIT_PCD 4
+-#define _PAGE_BIT_ACCESSED 5
+-#define _PAGE_BIT_DIRTY 6
+-#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page, Pentium+, if present.. */
+-#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
+-/*#define _PAGE_BIT_UNUSED1 9*/ /* available for programmer */
+-#define _PAGE_BIT_UNUSED2 10
+-#define _PAGE_BIT_UNUSED3 11
+-#define _PAGE_BIT_NX 63
+-
+-#define _PAGE_PRESENT 0x001
+-#define _PAGE_RW 0x002
+-#define _PAGE_USER 0x004
+-#define _PAGE_PWT 0x008
+-#define _PAGE_PCD 0x010
+-#define _PAGE_ACCESSED 0x020
+-#define _PAGE_DIRTY 0x040
+-#define _PAGE_PSE 0x080 /* 4 MB (or 2MB) page, Pentium+, if present.. */
+-#define _PAGE_GLOBAL 0x100 /* Global TLB entry PPro+ */
+-/*#define _PAGE_UNUSED1 0x200*/ /* available for programmer */
+-#define _PAGE_UNUSED2 0x400
+-#define _PAGE_UNUSED3 0x800
+-
+-/* If _PAGE_PRESENT is clear, we use these: */
+-#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */
+-#define _PAGE_PROTNONE 0x080 /* if the user mapped it with PROT_NONE;
+- pte_present gives true */
+ #ifdef CONFIG_X86_PAE
+-#define _PAGE_NX (1ULL<<_PAGE_BIT_NX)
++#define LAST_PKMAP 512
+ #else
+-#define _PAGE_NX 0
++#define LAST_PKMAP 1024
+ #endif
+
+-/* Mapped page is I/O or foreign and has no associated page struct. */
+-#define _PAGE_IO 0x200
++#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE*(LAST_PKMAP + 1)) & PMD_MASK)
+
+-#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
+-#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
+-#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_IO)
+-
+-#define PAGE_NONE \
+- __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
+-#define PAGE_SHARED \
+- __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
+-
+-#define PAGE_SHARED_EXEC \
+- __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
+-#define PAGE_COPY_NOEXEC \
+- __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
+-#define PAGE_COPY_EXEC \
+- __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+-#define PAGE_COPY \
+- PAGE_COPY_NOEXEC
+-#define PAGE_READONLY \
+- __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
+-#define PAGE_READONLY_EXEC \
+- __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+-
+-#define _PAGE_KERNEL \
+- (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX)
+-#define _PAGE_KERNEL_EXEC \
+- (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
+-
+-extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
+-#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
+-#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
+-#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD)
+-#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
+-#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
+-
+-#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
+-#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
+-#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
+-#define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
+-#define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
+-#define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
+-#define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
+-
+-/*
+- * The i386 can't do page protection for execute, and considers that
+- * the same are read. Also, write permissions imply read permissions.
+- * This is the closest we can get..
+- */
+-#define __P000 PAGE_NONE
+-#define __P001 PAGE_READONLY
+-#define __P010 PAGE_COPY
+-#define __P011 PAGE_COPY
+-#define __P100 PAGE_READONLY_EXEC
+-#define __P101 PAGE_READONLY_EXEC
+-#define __P110 PAGE_COPY_EXEC
+-#define __P111 PAGE_COPY_EXEC
+-
+-#define __S000 PAGE_NONE
+-#define __S001 PAGE_READONLY
+-#define __S010 PAGE_SHARED
+-#define __S011 PAGE_SHARED
+-#define __S100 PAGE_READONLY_EXEC
+-#define __S101 PAGE_READONLY_EXEC
+-#define __S110 PAGE_SHARED_EXEC
+-#define __S111 PAGE_SHARED_EXEC
++#ifdef CONFIG_HIGHMEM
++# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
++#else
++# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
++#endif
+
+ /*
+ * Define this if things work differently on an i386 and an i486:
+@@ -221,28 +100,6 @@ extern unsigned long pg0[];
+
+ #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
+
+-/*
+- * The following only work if pte_present() is true.
+- * Undefined behaviour if not..
+- */
+-static inline int pte_dirty(pte_t pte) { return (pte).pte_low & _PAGE_DIRTY; }
+-static inline int pte_young(pte_t pte) { return (pte).pte_low & _PAGE_ACCESSED; }
+-static inline int pte_write(pte_t pte) { return (pte).pte_low & _PAGE_RW; }
+-static inline int pte_huge(pte_t pte) { return (pte).pte_low & _PAGE_PSE; }
+-
+-/*
+- * The following only works if pte_present() is not true.
+- */
+-static inline int pte_file(pte_t pte) { return (pte).pte_low & _PAGE_FILE; }
+-
+-static inline pte_t pte_mkclean(pte_t pte) { (pte).pte_low &= ~_PAGE_DIRTY; return pte; }
+-static inline pte_t pte_mkold(pte_t pte) { (pte).pte_low &= ~_PAGE_ACCESSED; return pte; }
+-static inline pte_t pte_wrprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_RW; return pte; }
+-static inline pte_t pte_mkdirty(pte_t pte) { (pte).pte_low |= _PAGE_DIRTY; return pte; }
+-static inline pte_t pte_mkyoung(pte_t pte) { (pte).pte_low |= _PAGE_ACCESSED; return pte; }
+-static inline pte_t pte_mkwrite(pte_t pte) { (pte).pte_low |= _PAGE_RW; return pte; }
+-static inline pte_t pte_mkhuge(pte_t pte) { (pte).pte_low |= _PAGE_PSE; return pte; }
+-
+ #ifdef CONFIG_X86_PAE
+ # include <asm/pgtable-3level.h>
+ #else
+@@ -250,111 +107,6 @@ static inline pte_t pte_mkhuge(pte_t pte
+ #endif
+
+ /*
+- * Rules for using pte_update - it must be called after any PTE update which
+- * has not been done using the set_pte / clear_pte interfaces. It is used by
+- * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
+- * updates should either be sets, clears, or set_pte_atomic for P->P
+- * transitions, which means this hook should only be called for user PTEs.
+- * This hook implies a P->P protection or access change has taken place, which
+- * requires a subsequent TLB flush. The notification can optionally be delayed
+- * until the TLB flush event by using the pte_update_defer form of the
+- * interface, but care must be taken to assure that the flush happens while
+- * still holding the same page table lock so that the shadow and primary pages
+- * do not become out of sync on SMP.
+- */
+-#define pte_update(mm, addr, ptep) do { } while (0)
+-#define pte_update_defer(mm, addr, ptep) do { } while (0)
+-
+-/* local pte updates need not use xchg for locking */
+-static inline pte_t xen_local_ptep_get_and_clear(pte_t *ptep, pte_t res)
+-{
+- xen_set_pte(ptep, __pte(0));
+- return res;
+-}
+-
+-/*
+- * We only update the dirty/accessed state if we set
+- * the dirty bit by hand in the kernel, since the hardware
+- * will do the accessed bit for us, and we don't want to
+- * race with other CPU's that might be updating the dirty
+- * bit at the same time.
+- */
+-#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+-#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
+-({ \
+- int __changed = !pte_same(*(ptep), entry); \
+- if (__changed && (dirty)) { \
+- if ( likely((vma)->vm_mm == current->mm) ) { \
+- BUG_ON(HYPERVISOR_update_va_mapping(address, \
+- entry, \
+- (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
+- UVMF_INVLPG|UVMF_MULTI)); \
+- } else { \
+- xen_l1_entry_update(ptep, entry); \
+- flush_tlb_page(vma, address); \
+- } \
+- } \
+- __changed; \
+-})
+-
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+-#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
+- int __ret = 0; \
+- if (pte_young(*(ptep))) \
+- __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
+- &(ptep)->pte_low); \
+- if (__ret) \
+- pte_update((vma)->vm_mm, addr, ptep); \
+- __ret; \
+-})
+-
+-#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
+-#define ptep_clear_flush_young(vma, address, ptep) \
+-({ \
+- pte_t __pte = *(ptep); \
+- int __young = pte_young(__pte); \
+- __pte = pte_mkold(__pte); \
+- if (PagePinned(virt_to_page((vma)->vm_mm->pgd))) \
+- (void)ptep_set_access_flags(vma, address, ptep, __pte, __young); \
+- else if (__young) \
+- (ptep)->pte_low = __pte.pte_low; \
+- __young; \
+-})
+-
+-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+-static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+-{
+- pte_t pte = *ptep;
+- if (!pte_none(pte)
+- && (mm != &init_mm
+- || HYPERVISOR_update_va_mapping(addr, __pte(0), 0))) {
+- pte = xen_ptep_get_and_clear(ptep, pte);
+- pte_update(mm, addr, ptep);
+- }
+- return pte;
+-}
+-
+-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
+-#define ptep_get_and_clear_full(mm, addr, ptep, full) \
+- ((full) ? ({ \
+- pte_t __res = *(ptep); \
+- if (PagePinned(virt_to_page((mm)->pgd))) \
+- xen_l1_entry_update(ptep, __pte(0)); \
+- else \
+- *(ptep) = __pte(0); \
+- __res; \
+- }) : \
+- ptep_get_and_clear(mm, addr, ptep))
+-
+-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
+-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+-{
+- pte_t pte = *ptep;
+- if (pte_write(pte))
+- set_pte_at(mm, addr, ptep, pte_wrprotect(pte));
+-}
+-
+-/*
+ * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
+ *
+ * dst - pointer to pgd range anwhere on a pgd page
+@@ -383,26 +135,6 @@ static inline void clone_pgd_range(pgd_t
+
+ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+
+-static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+-{
+- /*
+- * Since this might change the present bit (which controls whether
+- * a pte_t object has undergone p2m translation), we must use
+- * pte_val() on the input pte and __pte() for the return value.
+- */
+- paddr_t pteval = pte_val(pte);
+-
+- pteval &= _PAGE_CHG_MASK;
+- pteval |= pgprot_val(newprot);
+-#ifdef CONFIG_X86_PAE
+- pteval &= __supported_pte_mask;
+-#endif
+- return __pte(pteval);
+-}
+-
+-#define pmd_large(pmd) \
+-((__pmd_val(pmd) & (_PAGE_PSE|_PAGE_PRESENT)) == (_PAGE_PSE|_PAGE_PRESENT))
+-
+ /*
+ * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
+ *
+@@ -424,6 +156,8 @@ static inline pte_t pte_modify(pte_t pte
+ */
+ #define pgd_offset_k(address) pgd_offset(&init_mm, address)
+
++static inline int pud_large(pud_t pud) { return 0; }
++
+ /*
+ * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
+ *
+@@ -449,26 +183,6 @@ static inline pte_t pte_modify(pte_t pte
+ #define pmd_page_vaddr(pmd) \
+ ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
+
+-/*
+- * Helper function that returns the kernel pagetable entry controlling
+- * the virtual address 'address'. NULL means no pagetable entry present.
+- * NOTE: the return type is pte_t but if the pmd is PSE then we return it
+- * as a pte too.
+- */
+-extern pte_t *lookup_address(unsigned long address);
+-
+-/*
+- * Make a given kernel text page executable/non-executable.
+- * Returns the previous executability setting of that page (which
+- * is used to restore the previous state). Used by the SMP bootup code.
+- * NOTE: this is an __init function for security reasons.
+- */
+-#ifdef CONFIG_X86_PAE
+- extern int set_kernel_exec(unsigned long vaddr, int enable);
+-#else
+- static inline int set_kernel_exec(unsigned long vaddr, int enable) { return 0;}
+-#endif
+-
+ #if defined(CONFIG_HIGHPTE)
+ #define pte_offset_map(dir, address) \
+ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
+@@ -496,59 +210,22 @@ extern pte_t *lookup_address(unsigned lo
+ */
+ #define update_mmu_cache(vma,address,pte) do { } while (0)
+
+-#include <xen/features.h>
+ void make_lowmem_page_readonly(void *va, unsigned int feature);
+ void make_lowmem_page_writable(void *va, unsigned int feature);
+-void make_page_readonly(void *va, unsigned int feature);
+-void make_page_writable(void *va, unsigned int feature);
+-void make_pages_readonly(void *va, unsigned int nr, unsigned int feature);
+-void make_pages_writable(void *va, unsigned int nr, unsigned int feature);
+-
+-#define virt_to_ptep(va) \
+-({ \
+- pte_t *__ptep = lookup_address((unsigned long)(va)); \
+- BUG_ON(!__ptep || !pte_present(*__ptep)); \
+- __ptep; \
+-})
+-
+-#define arbitrary_virt_to_machine(va) \
+- (((maddr_t)pte_mfn(*virt_to_ptep(va)) << PAGE_SHIFT) \
+- | ((unsigned long)(va) & (PAGE_SIZE - 1)))
+
+ #endif /* !__ASSEMBLY__ */
+
++/*
++ * kern_addr_valid() is (1) for FLATMEM and (0) for
++ * SPARSEMEM and DISCONTIGMEM
++ */
+ #ifdef CONFIG_FLATMEM
+ #define kern_addr_valid(addr) (1)
+-#endif /* CONFIG_FLATMEM */
+-
+-int direct_remap_pfn_range(struct vm_area_struct *vma,
+- unsigned long address,
+- unsigned long mfn,
+- unsigned long size,
+- pgprot_t prot,
+- domid_t domid);
+-int direct_kernel_remap_pfn_range(unsigned long address,
+- unsigned long mfn,
+- unsigned long size,
+- pgprot_t prot,
+- domid_t domid);
+-int create_lookup_pte_addr(struct mm_struct *mm,
+- unsigned long address,
+- uint64_t *ptep);
+-int touch_pte_range(struct mm_struct *mm,
+- unsigned long address,
+- unsigned long size);
+-
+-int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
+- unsigned long addr, unsigned long end, pgprot_t newprot,
+- int dirty_accountable);
+-
+-#define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) \
+- xen_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable)
++#else
++#define kern_addr_valid(kaddr) (0)
++#endif
+
+ #define io_remap_pfn_range(vma,from,pfn,size,prot) \
+ direct_remap_pfn_range(vma,from,pfn,size,prot,DOMID_IO)
+
+-#include <asm-generic/pgtable.h>
+-
+ #endif /* _I386_PGTABLE_H */
+--- a/include/asm-x86/mach-xen/asm/pgtable-3level.h
++++ b/include/asm-x86/mach-xen/asm/pgtable-3level.h
+@@ -18,16 +18,18 @@
+ printk("%s:%d: bad pgd %p(%016Lx pfn %08Lx).\n", __FILE__, __LINE__, \
+ &(e), __pgd_val(e), (pgd_val(e) & PTE_MASK) >> PAGE_SHIFT)
+
+-#define pud_none(pud) 0
+-#define pud_bad(pud) 0
+-#define pud_present(pud) 1
+
+-/*
+- * All present pages with !NX bit are kernel-executable:
+- */
+-static inline int pte_exec_kernel(pte_t pte)
++static inline int pud_none(pud_t pud)
++{
++ return __pud_val(pud) == 0;
++}
++static inline int pud_bad(pud_t pud)
+ {
+- return !(__pte_val(pte) & _PAGE_NX);
++ return (__pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER)) != 0;
++}
++static inline int pud_present(pud_t pud)
++{
++ return __pud_val(pud) & _PAGE_PRESENT;
+ }
+
+ /* Rules for using set_pte: the pte being assigned *must* be
+@@ -44,14 +46,6 @@ static inline void xen_set_pte(pte_t *pt
+ ptep->pte_low = pte.pte_low;
+ }
+
+-static inline void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
+- pte_t *ptep , pte_t pte)
+-{
+- if ((mm != current->mm && mm != &init_mm) ||
+- HYPERVISOR_update_va_mapping(addr, pte, 0))
+- xen_set_pte(ptep, pte);
+-}
+-
+ static inline void xen_set_pte_atomic(pte_t *ptep, pte_t pte)
+ {
+ set_64bit((unsigned long long *)(ptep),__pte_val(pte));
+@@ -70,14 +64,11 @@ static inline void xen_set_pud(pud_t *pu
+ * entry, so clear the bottom half first and enforce ordering with a compiler
+ * barrier.
+ */
+-static inline void xen_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++static inline void __xen_pte_clear(pte_t *ptep)
+ {
+- if ((mm != current->mm && mm != &init_mm)
+- || HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
+- ptep->pte_low = 0;
+- smp_wmb();
+- ptep->pte_high = 0;
+- }
++ ptep->pte_low = 0;
++ smp_wmb();
++ ptep->pte_high = 0;
+ }
+
+ static inline void xen_pmd_clear(pmd_t *pmd)
+@@ -85,21 +76,25 @@ static inline void xen_pmd_clear(pmd_t *
+ xen_l2_entry_update(pmd, __pmd(0));
+ }
+
+-#define set_pte(ptep, pte) xen_set_pte(ptep, pte)
+-#define set_pte_at(mm, addr, ptep, pte) xen_set_pte_at(mm, addr, ptep, pte)
+-#define set_pte_atomic(ptep, pte) xen_set_pte_atomic(ptep, pte)
+-#define set_pmd(pmdp, pmd) xen_set_pmd(pmdp, pmd)
+-#define set_pud(pudp, pud) xen_set_pud(pudp, pud)
+-#define pte_clear(mm, addr, ptep) xen_pte_clear(mm, addr, ptep)
+-#define pmd_clear(pmd) xen_pmd_clear(pmd)
++static inline void pud_clear(pud_t *pudp)
++{
++ pgdval_t pgd;
++
++ set_pud(pudp, __pud(0));
+
+-/*
+- * Pentium-II erratum A13: in PAE mode we explicitly have to flush
+- * the TLB via cr3 if the top-level pgd is changed...
+- * We do not let the generic code free and clear pgd entries due to
+- * this erratum.
+- */
+-static inline void pud_clear (pud_t * pud) { }
++ /*
++ * According to Intel App note "TLBs, Paging-Structure Caches,
++ * and Their Invalidation", April 2007, document 317080-001,
++ * section 8.1: in PAE mode we explicitly have to flush the
++ * TLB via cr3 if the top-level pgd is changed...
++ *
++ * Make sure the pud entry we're updating is within the
++ * current pgd to avoid unnecessary TLB flushes.
++ */
++ pgd = read_cr3();
++ if (__pa(pudp) >= pgd && __pa(pudp) < (pgd + sizeof(pgd_t)*PTRS_PER_PGD))
++ xen_tlb_flush();
++}
+
+ #define pud_page(pud) \
+ ((struct page *) __va(pud_val(pud) & PAGE_MASK))
+@@ -128,24 +123,6 @@ static inline pte_t xen_ptep_get_and_cle
+ #define xen_ptep_get_and_clear(xp, pte) xen_local_ptep_get_and_clear(xp, pte)
+ #endif
+
+-#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+-#define ptep_clear_flush(vma, addr, ptep) \
+-({ \
+- pte_t *__ptep = (ptep); \
+- pte_t __res = *__ptep; \
+- if (!pte_none(__res) && \
+- ((vma)->vm_mm != current->mm || \
+- HYPERVISOR_update_va_mapping(addr, __pte(0), \
+- (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
+- UVMF_INVLPG|UVMF_MULTI))) { \
+- __ptep->pte_low = 0; \
+- smp_wmb(); \
+- __ptep->pte_high = 0; \
+- flush_tlb_page(vma, addr); \
+- } \
+- __res; \
+-})
+-
+ #define __HAVE_ARCH_PTE_SAME
+ static inline int pte_same(pte_t a, pte_t b)
+ {
+@@ -168,26 +145,12 @@ static inline int pte_none(pte_t pte)
+ mfn_to_local_pfn(__pte_mfn(_pte)) : \
+ __pte_mfn(_pte))
+
+-extern unsigned long long __supported_pte_mask;
+-
+-static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
+-{
+- return __pte((((unsigned long long)page_nr << PAGE_SHIFT) |
+- pgprot_val(pgprot)) & __supported_pte_mask);
+-}
+-
+-static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
+-{
+- return __pmd((((unsigned long long)page_nr << PAGE_SHIFT) |
+- pgprot_val(pgprot)) & __supported_pte_mask);
+-}
+-
+ /*
+ * Bits 0, 6 and 7 are taken in the low part of the pte,
+ * put the 32 bits of offset into the high part.
+ */
+ #define pte_to_pgoff(pte) ((pte).pte_high)
+-#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
++#define pgoff_to_pte(off) ((pte_t) { { .pte_low = _PAGE_FILE, .pte_high = (off) } })
+ #define PTE_FILE_MAX_BITS 32
+
+ /* Encode and de-code a swap entry */
+@@ -195,8 +158,6 @@ static inline pmd_t pfn_pmd(unsigned lon
+ #define __swp_offset(x) ((x).val >> 5)
+ #define __swp_entry(type, offset) ((swp_entry_t){(type) | (offset) << 5})
+ #define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high })
+-#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val })
+-
+-#define __pmd_free_tlb(tlb, x) do { } while (0)
++#define __swp_entry_to_pte(x) ((pte_t){ { .pte_high = (x).val } })
+
+ #endif /* _I386_PGTABLE_3LEVEL_H */
+--- a/include/asm-x86/mach-xen/asm/pgtable_64.h
++++ b/include/asm-x86/mach-xen/asm/pgtable_64.h
+@@ -13,47 +13,26 @@
+ #include <linux/threads.h>
+ #include <linux/sched.h>
+ #include <asm/pda.h>
+-#ifdef CONFIG_XEN
+-#include <asm/hypervisor.h>
+
++#ifdef CONFIG_XEN
+ extern pud_t level3_user_pgt[512];
+
+ extern void xen_init_pt(void);
+-
+-extern pte_t *lookup_address(unsigned long address);
+-
+-#define virt_to_ptep(va) \
+-({ \
+- pte_t *__ptep = lookup_address((unsigned long)(va)); \
+- BUG_ON(!__ptep || !pte_present(*__ptep)); \
+- __ptep; \
+-})
+-
+-#define arbitrary_virt_to_machine(va) \
+- (((maddr_t)pte_mfn(*virt_to_ptep(va)) << PAGE_SHIFT) \
+- | ((unsigned long)(va) & (PAGE_SIZE - 1)))
+ #endif
+
+ extern pud_t level3_kernel_pgt[512];
+ extern pud_t level3_ident_pgt[512];
+ extern pmd_t level2_kernel_pgt[512];
+ extern pgd_t init_level4_pgt[];
+-extern unsigned long __supported_pte_mask;
+
+ #define swapper_pg_dir init_level4_pgt
+
+ extern void paging_init(void);
+-extern void clear_kernel_mapping(unsigned long addr, unsigned long size);
+-
+-/*
+- * ZERO_PAGE is a global shared page that is always zero: used
+- * for zero-mapped memory areas etc..
+- */
+-extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
+-#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+
+ #endif /* !__ASSEMBLY__ */
+
++#define SHARED_KERNEL_PMD 1
++
+ /*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+ */
+@@ -96,31 +75,63 @@ extern unsigned long empty_zero_page[PAG
+ #define pgd_none(x) (!__pgd_val(x))
+ #define pud_none(x) (!__pud_val(x))
+
+-static inline void set_pte(pte_t *dst, pte_t val)
++struct mm_struct;
++
++#define __xen_pte_clear(ptep) xen_set_pte(ptep, __pte(0))
++
++static inline void xen_set_pte(pte_t *ptep, pte_t pte)
++{
++ *ptep = pte;
++}
++
++static inline void xen_set_pte_atomic(pte_t *ptep, pte_t pte)
++{
++ xen_set_pte(ptep, pte);
++}
++
++#ifdef CONFIG_SMP
++static inline pte_t xen_ptep_get_and_clear(pte_t *xp, pte_t ret)
++{
++ return __pte_ma(xchg(&xp->pte, 0));
++}
++#else
++#define xen_ptep_get_and_clear(xp, pte) xen_local_ptep_get_and_clear(xp, pte)
++#endif
++
++static inline void xen_set_pmd(pmd_t *pmdp, pmd_t pmd)
+ {
+- *dst = val;
++ xen_l2_entry_update(pmdp, pmd);
+ }
+
+-#define set_pmd(pmdptr, pmdval) xen_l2_entry_update(pmdptr, (pmdval))
+-#define set_pud(pudptr, pudval) xen_l3_entry_update(pudptr, (pudval))
+-#define set_pgd(pgdptr, pgdval) xen_l4_entry_update(pgdptr, (pgdval))
++static inline void xen_pmd_clear(pmd_t *pmd)
++{
++ xen_set_pmd(pmd, xen_make_pmd(0));
++}
++
++static inline void xen_set_pud(pud_t *pudp, pud_t pud)
++{
++ xen_l3_entry_update(pudp, pud);
++}
+
+-static inline void pud_clear (pud_t * pud)
++static inline void xen_pud_clear(pud_t *pud)
+ {
+- set_pud(pud, __pud(0));
++ xen_set_pud(pud, xen_make_pud(0));
+ }
+
+ #define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
+
+-static inline void pgd_clear (pgd_t * pgd)
++static inline void xen_set_pgd(pgd_t *pgdp, pgd_t pgd)
+ {
+- set_pgd(pgd, __pgd(0));
+- set_pgd(__user_pgd(pgd), __pgd(0));
++ xen_l4_entry_update(pgdp, pgd);
+ }
+
+-#define pte_same(a, b) ((a).pte == (b).pte)
++static inline void xen_pgd_clear(pgd_t * pgd)
++{
++ xen_set_pgd(pgd, xen_make_pgd(0));
++ xen_set_pgd(__user_pgd(pgd), xen_make_pgd(0));
++}
+
+-#define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK))
++#define pte_same(a, b) ((a).pte == (b).pte)
+
+ #endif /* !__ASSEMBLY__ */
+
+@@ -131,8 +142,6 @@ static inline void pgd_clear (pgd_t * pg
+ #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
+ #define PGDIR_MASK (~(PGDIR_SIZE-1))
+
+-#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
+-#define FIRST_USER_ADDRESS 0
+
+ #define MAXMEM _AC(0x3fffffffffff, UL)
+ #define VMALLOC_START _AC(0xffffc20000000000, UL)
+@@ -142,105 +151,6 @@ static inline void pgd_clear (pgd_t * pg
+ #define MODULES_END _AC(0xfffffffffff00000, UL)
+ #define MODULES_LEN (MODULES_END - MODULES_VADDR)
+
+-#define _PAGE_BIT_PRESENT 0
+-#define _PAGE_BIT_RW 1
+-#define _PAGE_BIT_USER 2
+-#define _PAGE_BIT_PWT 3
+-#define _PAGE_BIT_PCD 4
+-#define _PAGE_BIT_ACCESSED 5
+-#define _PAGE_BIT_DIRTY 6
+-#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
+-#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
+-#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
+-
+-#define _PAGE_PRESENT 0x001
+-#define _PAGE_RW 0x002
+-#define _PAGE_USER 0x004
+-#define _PAGE_PWT 0x008
+-#define _PAGE_PCD 0x010
+-#define _PAGE_ACCESSED 0x020
+-#define _PAGE_DIRTY 0x040
+-#define _PAGE_PSE 0x080 /* 2MB page */
+-#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */
+-#define _PAGE_GLOBAL 0x100 /* Global TLB entry */
+-
+-#define _PAGE_PROTNONE 0x080 /* If not present */
+-#define _PAGE_NX (_AC(1,UL)<<_PAGE_BIT_NX)
+-
+-/* Mapped page is I/O or foreign and has no associated page struct. */
+-#define _PAGE_IO 0x200
+-
+-#ifndef __ASSEMBLY__
+-#if CONFIG_XEN_COMPAT <= 0x030002
+-extern unsigned int __kernel_page_user;
+-#else
+-#define __kernel_page_user 0
+-#endif
+-#endif
+-
+-#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
+-#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY | __kernel_page_user)
+-
+-#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_IO)
+-
+-#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
+-#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
+-#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
+-#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
+-#define PAGE_COPY PAGE_COPY_NOEXEC
+-#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+-#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
+-#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+-#define __PAGE_KERNEL \
+- (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX | __kernel_page_user)
+-#define __PAGE_KERNEL_EXEC \
+- (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | __kernel_page_user)
+-#define __PAGE_KERNEL_NOCACHE \
+- (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_PCD | _PAGE_ACCESSED | _PAGE_NX | __kernel_page_user)
+-#define __PAGE_KERNEL_RO \
+- (_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX | __kernel_page_user)
+-#define __PAGE_KERNEL_VSYSCALL \
+- (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+-#define __PAGE_KERNEL_VSYSCALL_NOCACHE \
+- (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_PCD)
+-#define __PAGE_KERNEL_LARGE \
+- (__PAGE_KERNEL | _PAGE_PSE)
+-#define __PAGE_KERNEL_LARGE_EXEC \
+- (__PAGE_KERNEL_EXEC | _PAGE_PSE)
+-
+-/*
+- * We don't support GLOBAL page in xenolinux64
+- */
+-#define MAKE_GLOBAL(x) __pgprot((x))
+-
+-#define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL)
+-#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
+-#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
+-#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
+-#define PAGE_KERNEL_VSYSCALL32 __pgprot(__PAGE_KERNEL_VSYSCALL)
+-#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
+-#define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE)
+-#define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE)
+-
+-/* xwr */
+-#define __P000 PAGE_NONE
+-#define __P001 PAGE_READONLY
+-#define __P010 PAGE_COPY
+-#define __P011 PAGE_COPY
+-#define __P100 PAGE_READONLY_EXEC
+-#define __P101 PAGE_READONLY_EXEC
+-#define __P110 PAGE_COPY_EXEC
+-#define __P111 PAGE_COPY_EXEC
+-
+-#define __S000 PAGE_NONE
+-#define __S001 PAGE_READONLY
+-#define __S010 PAGE_SHARED
+-#define __S011 PAGE_SHARED
+-#define __S100 PAGE_READONLY_EXEC
+-#define __S101 PAGE_READONLY_EXEC
+-#define __S110 PAGE_SHARED_EXEC
+-#define __S111 PAGE_SHARED_EXEC
+-
+ #ifndef __ASSEMBLY__
+
+ static inline unsigned long pgd_bad(pgd_t pgd)
+@@ -258,119 +168,26 @@ static inline unsigned long pmd_bad(pmd_
+ return __pmd_val(pmd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
+ }
+
+-#define set_pte_at(_mm,addr,ptep,pteval) do { \
+- if (((_mm) != current->mm && (_mm) != &init_mm) || \
+- HYPERVISOR_update_va_mapping((addr), (pteval), 0)) \
+- set_pte((ptep), (pteval)); \
+-} while (0)
+-
+ #define pte_none(x) (!(x).pte)
+ #define pte_present(x) ((x).pte & (_PAGE_PRESENT | _PAGE_PROTNONE))
+-#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
+
+-#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
++#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) /* FIXME: is this right? */
+
+ #define __pte_mfn(_pte) (((_pte).pte & PTE_MASK) >> PAGE_SHIFT)
+ #define pte_mfn(_pte) ((_pte).pte & _PAGE_PRESENT ? \
+ __pte_mfn(_pte) : pfn_to_mfn(__pte_mfn(_pte)))
+-#define pte_pfn(_pte) ((_pte).pte & _PAGE_IO ? end_pfn : \
++#define pte_pfn(_pte) ((_pte).pte & _PAGE_IO ? max_mapnr : \
+ (_pte).pte & _PAGE_PRESENT ? \
+ mfn_to_local_pfn(__pte_mfn(_pte)) : \
+ __pte_mfn(_pte))
+
+ #define pte_page(x) pfn_to_page(pte_pfn(x))
+
+-static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
+-{
+- unsigned long pte = page_nr << PAGE_SHIFT;
+- pte |= pgprot_val(pgprot);
+- pte &= __supported_pte_mask;
+- return __pte(pte);
+-}
+-
+-static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+-{
+- pte_t pte = *ptep;
+- if (!pte_none(pte)) {
+- if ((mm != &init_mm) ||
+- HYPERVISOR_update_va_mapping(addr, __pte(0), 0))
+- pte = __pte_ma(xchg(&ptep->pte, 0));
+- }
+- return pte;
+-}
+-
+-static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
+-{
+- if (full) {
+- pte_t pte = *ptep;
+- if (PagePinned(virt_to_page(mm->pgd)))
+- xen_l1_entry_update(ptep, __pte(0));
+- else
+- *ptep = __pte(0);
+- return pte;
+- }
+- return ptep_get_and_clear(mm, addr, ptep);
+-}
+-
+-#define ptep_clear_flush(vma, addr, ptep) \
+-({ \
+- pte_t *__ptep = (ptep); \
+- pte_t __res = *__ptep; \
+- if (!pte_none(__res) && \
+- ((vma)->vm_mm != current->mm || \
+- HYPERVISOR_update_va_mapping(addr, __pte(0), \
+- (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
+- UVMF_INVLPG|UVMF_MULTI))) { \
+- __ptep->pte = 0; \
+- flush_tlb_page(vma, addr); \
+- } \
+- __res; \
+-})
+-
+-/*
+- * The following only work if pte_present() is true.
+- * Undefined behaviour if not..
+- */
+-#define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT)
+-static inline int pte_dirty(pte_t pte) { return __pte_val(pte) & _PAGE_DIRTY; }
+-static inline int pte_young(pte_t pte) { return __pte_val(pte) & _PAGE_ACCESSED; }
+-static inline int pte_write(pte_t pte) { return __pte_val(pte) & _PAGE_RW; }
+-static inline int pte_file(pte_t pte) { return __pte_val(pte) & _PAGE_FILE; }
+-static inline int pte_huge(pte_t pte) { return __pte_val(pte) & _PAGE_PSE; }
+-
+-static inline pte_t pte_mkclean(pte_t pte) { __pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
+-static inline pte_t pte_mkold(pte_t pte) { __pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
+-static inline pte_t pte_wrprotect(pte_t pte) { __pte_val(pte) &= ~_PAGE_RW; return pte; }
+-static inline pte_t pte_mkexec(pte_t pte) { __pte_val(pte) &= ~_PAGE_NX; return pte; }
+-static inline pte_t pte_mkdirty(pte_t pte) { __pte_val(pte) |= _PAGE_DIRTY; return pte; }
+-static inline pte_t pte_mkyoung(pte_t pte) { __pte_val(pte) |= _PAGE_ACCESSED; return pte; }
+-static inline pte_t pte_mkwrite(pte_t pte) { __pte_val(pte) |= _PAGE_RW; return pte; }
+-static inline pte_t pte_mkhuge(pte_t pte) { __pte_val(pte) |= _PAGE_PSE; return pte; }
+-static inline pte_t pte_clrhuge(pte_t pte) { __pte_val(pte) &= ~_PAGE_PSE; return pte; }
+-
+-static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
+-{
+- if (!pte_young(*ptep))
+- return 0;
+- return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte);
+-}
+-
+-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+-{
+- pte_t pte = *ptep;
+- if (pte_write(pte))
+- set_pte_at(mm, addr, ptep, pte_wrprotect(pte));
+-}
+-
+ /*
+ * Macro to mark a page protection value as "uncacheable".
+ */
+ #define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT))
+
+-static inline int pmd_large(pmd_t pte) {
+- return (__pmd_val(pte) & __LARGE_PTE) == __LARGE_PTE;
+-}
+-
+
+ /*
+ * Conversion functions: convert a page and protection to a page entry,
+@@ -386,6 +203,7 @@ static inline int pmd_large(pmd_t pte) {
+ #define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
+ #define pgd_offset_k(address) (init_level4_pgt + pgd_index(address))
+ #define pgd_present(pgd) (__pgd_val(pgd) & _PAGE_PRESENT)
++static inline int pgd_large(pgd_t pgd) { return 0; }
+ #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
+
+ /* PUD - Level3 access */
+@@ -396,6 +214,12 @@ static inline int pmd_large(pmd_t pte) {
+ #define pud_offset(pgd, address) ((pud_t *) pgd_page_vaddr(*(pgd)) + pud_index(address))
+ #define pud_present(pud) (__pud_val(pud) & _PAGE_PRESENT)
+
++static inline int pud_large(pud_t pte)
++{
++ return (__pud_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) ==
++ (_PAGE_PSE|_PAGE_PRESENT);
++}
++
+ /* PMD - Level 2 access */
+ #define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK))
+ #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+@@ -411,36 +235,18 @@ static inline int pmd_large(pmd_t pte) {
+ #else
+ #define pmd_present(x) (__pmd_val(x) & _PAGE_PRESENT)
+ #endif
+-#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
+ #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot)))
+ #define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)
+
+ #define pte_to_pgoff(pte) ((__pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
+-#define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE })
++#define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | _PAGE_FILE })
+ #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT
+
+ /* PTE - Level 1 access. */
+
+ /* page, protection -> pte */
+ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+-#define mk_pte_huge(entry) (__pte_val(entry) |= _PAGE_PRESENT | _PAGE_PSE)
+
+-/* Change flags of a PTE */
+-static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+-{
+- /*
+- * Since this might change the present bit (which controls whether
+- * a pte_t object has undergone p2m translation), we must use
+- * pte_val() on the input pte and __pte() for the return value.
+- */
+- unsigned long pteval = pte_val(pte);
+-
+- pteval &= _PAGE_CHG_MASK;
+- pteval |= pgprot_val(newprot);
+- pteval &= __supported_pte_mask;
+- return __pte(pteval);
+-}
+-
+ #define pte_index(address) \
+ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+ #define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_vaddr(*(dir)) + \
+@@ -454,101 +260,21 @@ static inline pte_t pte_modify(pte_t pte
+
+ #define update_mmu_cache(vma,address,pte) do { } while (0)
+
+-/*
+- * Rules for using ptep_establish: the pte MUST be a user pte, and
+- * must be a present->present transition.
+- */
+-#define __HAVE_ARCH_PTEP_ESTABLISH
+-#define ptep_establish(vma, address, ptep, pteval) \
+- do { \
+- if ( likely((vma)->vm_mm == current->mm) ) { \
+- BUG_ON(HYPERVISOR_update_va_mapping(address, \
+- pteval, \
+- (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
+- UVMF_INVLPG|UVMF_MULTI)); \
+- } else { \
+- xen_l1_entry_update(ptep, pteval); \
+- flush_tlb_page(vma, address); \
+- } \
+- } while (0)
+-
+-/* We only update the dirty/accessed state if we set
+- * the dirty bit by hand in the kernel, since the hardware
+- * will do the accessed bit for us, and we don't want to
+- * race with other CPU's that might be updating the dirty
+- * bit at the same time. */
+-#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+-#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
+-({ \
+- int __changed = !pte_same(*(ptep), entry); \
+- if (__changed && (dirty)) \
+- ptep_establish(vma, address, ptep, entry); \
+- __changed; \
+-})
+-
+-#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
+-#define ptep_clear_flush_young(vma, address, ptep) \
+-({ \
+- pte_t __pte = *(ptep); \
+- int __young = pte_young(__pte); \
+- __pte = pte_mkold(__pte); \
+- if (PagePinned(virt_to_page((vma)->vm_mm->pgd))) \
+- (void)ptep_set_access_flags(vma, address, ptep, __pte, __young); \
+- else if (__young) \
+- set_pte(ptep, __pte); \
+- __young; \
+-})
+-
+ /* Encode and de-code a swap entry */
+ #define __swp_type(x) (((x).val >> 1) & 0x3f)
+ #define __swp_offset(x) ((x).val >> 8)
+ #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
+ #define __pte_to_swp_entry(pte) ((swp_entry_t) { __pte_val(pte) })
+-#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+-
+-extern spinlock_t pgd_lock;
+-extern struct list_head pgd_list;
++#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
+
+ extern int kern_addr_valid(unsigned long addr);
+-
+-#define DOMID_LOCAL (0xFFFFU)
+-
+-struct vm_area_struct;
+-
+-int direct_remap_pfn_range(struct vm_area_struct *vma,
+- unsigned long address,
+- unsigned long mfn,
+- unsigned long size,
+- pgprot_t prot,
+- domid_t domid);
+-
+-int direct_kernel_remap_pfn_range(unsigned long address,
+- unsigned long mfn,
+- unsigned long size,
+- pgprot_t prot,
+- domid_t domid);
+-
+-int create_lookup_pte_addr(struct mm_struct *mm,
+- unsigned long address,
+- uint64_t *ptep);
+-
+-int touch_pte_range(struct mm_struct *mm,
+- unsigned long address,
+- unsigned long size);
+-
+-int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
+- unsigned long addr, unsigned long end, pgprot_t newprot,
+- int dirty_accountable);
+-
+-#define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) \
+- xen_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable)
+-
+-pte_t *lookup_address(unsigned long addr);
++extern void cleanup_highmap(void);
+
+ #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
+ direct_remap_pfn_range(vma,vaddr,pfn,size,prot,DOMID_IO)
+
+ #define HAVE_ARCH_UNMAPPED_AREA
++#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
+
+ #define pgtable_cache_init() do { } while (0)
+ #define check_pgt_cache() do { } while (0)
+@@ -561,13 +287,7 @@ pte_t *lookup_address(unsigned long addr
+ #define kc_offset_to_vaddr(o) \
+ (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))
+
+-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
+-#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
+ #define __HAVE_ARCH_PTE_SAME
+-#include <asm-generic/pgtable.h>
+ #endif /* !__ASSEMBLY__ */
+
+ #endif /* _X86_64_PGTABLE_H */
+--- a/include/asm-x86/mach-xen/asm/pgtable.h
++++ b/include/asm-x86/mach-xen/asm/pgtable.h
+@@ -1,5 +1,454 @@
++#ifndef _ASM_X86_PGTABLE_H
++#define _ASM_X86_PGTABLE_H
++
++#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
++#define FIRST_USER_ADDRESS 0
++
++#define _PAGE_BIT_PRESENT 0
++#define _PAGE_BIT_RW 1
++#define _PAGE_BIT_USER 2
++#define _PAGE_BIT_PWT 3
++#define _PAGE_BIT_PCD 4
++#define _PAGE_BIT_ACCESSED 5
++#define _PAGE_BIT_DIRTY 6
++#define _PAGE_BIT_FILE 6
++#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
++#define _PAGE_BIT_PAT 7 /* on 4KB pages */
++#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
++#define _PAGE_BIT_IO 9 /* Mapped page is I/O or foreign and
++ * has no associated page struct. */
++#define _PAGE_BIT_UNUSED2 10 /* available for programmer */
++#define _PAGE_BIT_UNUSED3 11
++#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
++#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
++
++/*
++ * Note: we use _AC(1, L) instead of _AC(1, UL) so that we get a
++ * sign-extended value on 32-bit with all 1's in the upper word,
++ * which preserves the upper pte values on 64-bit ptes:
++ */
++#define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT)
++#define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW)
++#define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER)
++#define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT)
++#define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD)
++#define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED)
++#define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY)
++#define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */
++#define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */
++#define _PAGE_IO (_AC(1, L)<<_PAGE_BIT_IO)
++#define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2)
++#define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3)
++#define _PAGE_PAT (_AC(1, L)<<_PAGE_BIT_PAT)
++#define _PAGE_PAT_LARGE (_AC(1, L)<<_PAGE_BIT_PAT_LARGE)
++
++#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
++#define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX)
++#else
++#define _PAGE_NX 0
++#endif
++
++/* If _PAGE_PRESENT is clear, we use these: */
++#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */
++#define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE;
++ pte_present gives true */
++
++#ifndef __ASSEMBLY__
++#if defined(CONFIG_X86_64) && CONFIG_XEN_COMPAT <= 0x030002
++extern unsigned int __kernel_page_user;
++#else
++#define __kernel_page_user 0
++#endif
++#endif
++
++#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
++#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY | __kernel_page_user)
++
++#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_IO)
++
++#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
++#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++
++#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_COPY PAGE_COPY_NOEXEC
++#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++
++#ifdef CONFIG_X86_32
++#define _PAGE_KERNEL_EXEC \
++ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
++#define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX)
++
++#ifndef __ASSEMBLY__
++extern pteval_t __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
++#endif /* __ASSEMBLY__ */
++#else
++#define __PAGE_KERNEL_EXEC \
++ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | __kernel_page_user)
++#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
++#endif
++
++#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
++#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
++#define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
++#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
++#define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
++#define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
++#define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
++#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
++#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
++
++/*
++ * We don't support GLOBAL page in xenolinux64
++ */
++#define MAKE_GLOBAL(x) __pgprot((x))
++
++#define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL)
++#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
++#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
++#define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX)
++#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
++#define PAGE_KERNEL_UC_MINUS MAKE_GLOBAL(__PAGE_KERNEL_UC_MINUS)
++#define PAGE_KERNEL_EXEC_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_EXEC_NOCACHE)
++#define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE)
++#define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC)
++#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
++#define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE)
++
++/* xwr */
++#define __P000 PAGE_NONE
++#define __P001 PAGE_READONLY
++#define __P010 PAGE_COPY
++#define __P011 PAGE_COPY
++#define __P100 PAGE_READONLY_EXEC
++#define __P101 PAGE_READONLY_EXEC
++#define __P110 PAGE_COPY_EXEC
++#define __P111 PAGE_COPY_EXEC
++
++#define __S000 PAGE_NONE
++#define __S001 PAGE_READONLY
++#define __S010 PAGE_SHARED
++#define __S011 PAGE_SHARED
++#define __S100 PAGE_READONLY_EXEC
++#define __S101 PAGE_READONLY_EXEC
++#define __S110 PAGE_SHARED_EXEC
++#define __S111 PAGE_SHARED_EXEC
++
++#ifndef __ASSEMBLY__
++
++/*
++ * ZERO_PAGE is a global shared page that is always zero: used
++ * for zero-mapped memory areas etc..
++ */
++extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
++#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
++
++extern spinlock_t pgd_lock;
++extern struct list_head pgd_list;
++
++/*
++ * The following only work if pte_present() is true.
++ * Undefined behaviour if not..
++ */
++static inline int pte_dirty(pte_t pte) { return __pte_val(pte) & _PAGE_DIRTY; }
++static inline int pte_young(pte_t pte) { return __pte_val(pte) & _PAGE_ACCESSED; }
++static inline int pte_write(pte_t pte) { return __pte_val(pte) & _PAGE_RW; }
++static inline int pte_file(pte_t pte) { return __pte_val(pte) & _PAGE_FILE; }
++static inline int pte_huge(pte_t pte) { return __pte_val(pte) & _PAGE_PSE; }
++static inline int pte_global(pte_t pte) { return 0; }
++static inline int pte_exec(pte_t pte) { return !(__pte_val(pte) & _PAGE_NX); }
++
++static inline int pmd_large(pmd_t pte) {
++ return (__pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) ==
++ (_PAGE_PSE|_PAGE_PRESENT);
++}
++
++static inline pte_t pte_mkclean(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_DIRTY); }
++static inline pte_t pte_mkold(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED); }
++static inline pte_t pte_wrprotect(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_RW); }
++static inline pte_t pte_mkexec(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_NX); }
++static inline pte_t pte_mkdirty(pte_t pte) { return __pte_ma(__pte_val(pte) | _PAGE_DIRTY); }
++static inline pte_t pte_mkyoung(pte_t pte) { return __pte_ma(__pte_val(pte) | _PAGE_ACCESSED); }
++static inline pte_t pte_mkwrite(pte_t pte) { return __pte_ma(__pte_val(pte) | _PAGE_RW); }
++static inline pte_t pte_mkhuge(pte_t pte) { return __pte_ma(__pte_val(pte) | _PAGE_PSE); }
++static inline pte_t pte_clrhuge(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_PSE); }
++static inline pte_t pte_mkglobal(pte_t pte) { return pte; }
++static inline pte_t pte_clrglobal(pte_t pte) { return pte; }
++
++extern pteval_t __supported_pte_mask;
++
++static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
++{
++ return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) |
++ pgprot_val(pgprot)) & __supported_pte_mask);
++}
++
++static inline pte_t pfn_pte_ma(unsigned long page_nr, pgprot_t pgprot)
++{
++ return __pte_ma((((phys_addr_t)page_nr << PAGE_SHIFT) |
++ pgprot_val(pgprot)) & __supported_pte_mask);
++}
++
++static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
++{
++ return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) |
++ pgprot_val(pgprot)) & __supported_pte_mask);
++}
++
++static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
++{
++ pteval_t val = pte_val(pte);
++
++ val &= _PAGE_CHG_MASK;
++ val |= pgprot_val(newprot) & __supported_pte_mask;
++
++ return __pte(val);
++}
++
++#define pte_pgprot(x) __pgprot(pte_val(x) & (0xfff | _PAGE_NX))
++
++#define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask)
++
++#define set_pte(ptep, pte) xen_set_pte(ptep, pte)
++#define set_pte_at(mm, addr, ptep, pte) xen_set_pte_at(mm, addr, ptep, pte)
++
++#define set_pte_atomic(ptep, pte) \
++ xen_set_pte_atomic(ptep, pte)
++
++#define set_pmd(pmdp, pmd) xen_set_pmd(pmdp, pmd)
++
++#ifndef __PAGETABLE_PUD_FOLDED
++#define set_pgd(pgdp, pgd) xen_set_pgd(pgdp, pgd)
++#define pgd_clear(pgd) xen_pgd_clear(pgd)
++#endif
++
++#ifndef set_pud
++# define set_pud(pudp, pud) xen_set_pud(pudp, pud)
++#endif
++
++#ifndef __PAGETABLE_PMD_FOLDED
++#define pud_clear(pud) xen_pud_clear(pud)
++#endif
++
++#define pte_clear(mm, addr, ptep) xen_pte_clear(mm, addr, ptep)
++#define pmd_clear(pmd) xen_pmd_clear(pmd)
++
++#define pte_update(mm, addr, ptep) do { } while (0)
++#define pte_update_defer(mm, addr, ptep) do { } while (0)
++
++#endif /* __ASSEMBLY__ */
++
+ #ifdef CONFIG_X86_32
+ # include "pgtable_32.h"
+ #else
+ # include "pgtable_64.h"
+ #endif
++
++#ifndef __ASSEMBLY__
++
++enum {
++ PG_LEVEL_NONE,
++ PG_LEVEL_4K,
++ PG_LEVEL_2M,
++ PG_LEVEL_1G,
++};
++
++/*
++ * Helper function that returns the kernel pagetable entry controlling
++ * the virtual address 'address'. NULL means no pagetable entry present.
++ * NOTE: the return type is pte_t but if the pmd is PSE then we return it
++ * as a pte too.
++ */
++extern pte_t *lookup_address(unsigned long address, unsigned int *level);
++
++/* local pte updates need not use xchg for locking */
++static inline pte_t xen_local_ptep_get_and_clear(pte_t *ptep, pte_t res)
++{
++ xen_set_pte(ptep, __pte(0));
++ return res;
++}
++
++static inline void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
++ pte_t *ptep , pte_t pte)
++{
++ if ((mm != current->mm && mm != &init_mm) ||
++ HYPERVISOR_update_va_mapping(addr, pte, 0))
++ xen_set_pte(ptep, pte);
++}
++
++static inline void xen_pte_clear(struct mm_struct *mm, unsigned long addr,
++ pte_t *ptep)
++{
++ if ((mm != current->mm && mm != &init_mm)
++ || HYPERVISOR_update_va_mapping(addr, __pte(0), 0))
++ __xen_pte_clear(ptep);
++}
++
++#ifndef CONFIG_PARAVIRT
++/*
++ * Rules for using pte_update - it must be called after any PTE update which
++ * has not been done using the set_pte / clear_pte interfaces. It is used by
++ * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
++ * updates should either be sets, clears, or set_pte_atomic for P->P
++ * transitions, which means this hook should only be called for user PTEs.
++ * This hook implies a P->P protection or access change has taken place, which
++ * requires a subsequent TLB flush. The notification can optionally be delayed
++ * until the TLB flush event by using the pte_update_defer form of the
++ * interface, but care must be taken to assure that the flush happens while
++ * still holding the same page table lock so that the shadow and primary pages
++ * do not become out of sync on SMP.
++ */
++#define pte_update(mm, addr, ptep) do { } while (0)
++#define pte_update_defer(mm, addr, ptep) do { } while (0)
++#endif
++
++/*
++ * We only update the dirty/accessed state if we set
++ * the dirty bit by hand in the kernel, since the hardware
++ * will do the accessed bit for us, and we don't want to
++ * race with other CPU's that might be updating the dirty
++ * bit at the same time.
++ */
++#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
++#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
++({ \
++ int __changed = !pte_same(*(ptep), entry); \
++ if (__changed && (dirty)) { \
++ if ( likely((vma)->vm_mm == current->mm) ) { \
++ BUG_ON(HYPERVISOR_update_va_mapping(address, \
++ entry, \
++ (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
++ UVMF_INVLPG|UVMF_MULTI)); \
++ } else { \
++ xen_l1_entry_update(ptep, entry); \
++ flush_tlb_page(vma, address); \
++ } \
++ } \
++ __changed; \
++})
++
++#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
++#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
++ int __ret = 0; \
++ if (pte_young(*(ptep))) \
++ __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
++ &(ptep)->pte); \
++ if (__ret) \
++ pte_update((vma)->vm_mm, addr, ptep); \
++ __ret; \
++})
++
++#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
++#define ptep_clear_flush_young(vma, address, ptep) \
++({ \
++ pte_t __pte = *(ptep); \
++ int __young = pte_young(__pte); \
++ __pte = pte_mkold(__pte); \
++ if (PagePinned(virt_to_page((vma)->vm_mm->pgd))) \
++ (void)ptep_set_access_flags(vma, address, ptep, __pte, __young); \
++ else if (__young) \
++ (ptep)->pte_low = __pte.pte_low; \
++ __young; \
++})
++
++#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
++#define ptep_clear_flush(vma, addr, ptep) \
++({ \
++ pte_t *__ptep = (ptep); \
++ pte_t __res = *__ptep; \
++ if (!pte_none(__res) && \
++ ((vma)->vm_mm != current->mm || \
++ HYPERVISOR_update_va_mapping(addr, __pte(0), \
++ (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
++ UVMF_INVLPG|UVMF_MULTI))) { \
++ __xen_pte_clear(__ptep); \
++ flush_tlb_page(vma, addr); \
++ } \
++ __res; \
++})
++
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
++static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ pte_t pte = *ptep;
++ if (!pte_none(pte)
++ && (mm != &init_mm
++ || HYPERVISOR_update_va_mapping(addr, __pte(0), 0))) {
++ pte = xen_ptep_get_and_clear(ptep, pte);
++ pte_update(mm, addr, ptep);
++ }
++ return pte;
++}
++
++#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
++#define ptep_get_and_clear_full(mm, addr, ptep, full) \
++ ((full) ? ({ \
++ pte_t *__ptep = (ptep); \
++ pte_t __res = *__ptep; \
++ if (!PagePinned(virt_to_page((mm)->pgd))) \
++ __xen_pte_clear(__ptep); \
++ else if (!pte_none(__res)) \
++ xen_l1_entry_update(__ptep, __pte(0)); \
++ __res; \
++ }) : \
++ ptep_get_and_clear(mm, addr, ptep))
++
++pte_t xen_ptep_get_and_clear_full(struct vm_area_struct *, unsigned long, pte_t *, int);
++
++#define __HAVE_ARCH_PTEP_SET_WRPROTECT
++static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++{
++ pte_t pte = *ptep;
++ if (pte_write(pte))
++ set_pte_at(mm, addr, ptep, pte_wrprotect(pte));
++}
++
++#define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) \
++ xen_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable)
++
++#define arbitrary_virt_to_machine(va) \
++({ \
++ unsigned int __lvl; \
++ pte_t *__ptep = lookup_address((unsigned long)(va), &__lvl); \
++ BUG_ON(!__ptep || __lvl != PG_LEVEL_4K || !pte_present(*__ptep));\
++ (((maddr_t)pte_mfn(*__ptep) << PAGE_SHIFT) \
++ | ((unsigned long)(va) & (PAGE_SIZE - 1))); \
++})
++
++#include <asm-generic/pgtable.h>
++
++#include <xen/features.h>
++void make_page_readonly(void *va, unsigned int feature);
++void make_page_writable(void *va, unsigned int feature);
++void make_pages_readonly(void *va, unsigned int nr, unsigned int feature);
++void make_pages_writable(void *va, unsigned int nr, unsigned int feature);
++
++struct vm_area_struct;
++
++int direct_remap_pfn_range(struct vm_area_struct *vma,
++ unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid);
++int direct_kernel_remap_pfn_range(unsigned long address,
++ unsigned long mfn,
++ unsigned long size,
++ pgprot_t prot,
++ domid_t domid);
++int create_lookup_pte_addr(struct mm_struct *mm,
++ unsigned long address,
++ uint64_t *ptep);
++int touch_pte_range(struct mm_struct *mm,
++ unsigned long address,
++ unsigned long size);
++
++int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
++ unsigned long addr, unsigned long end, pgprot_t newprot,
++ int dirty_accountable);
++
++#endif /* __ASSEMBLY__ */
++
++#endif /* _ASM_X86_PGTABLE_H */
+--- a/include/asm-x86/mach-xen/asm/processor_32.h
++++ /dev/null
+@@ -1,751 +0,0 @@
+-/*
+- * include/asm-i386/processor.h
+- *
+- * Copyright (C) 1994 Linus Torvalds
+- */
+-
+-#ifndef __ASM_I386_PROCESSOR_H
+-#define __ASM_I386_PROCESSOR_H
+-
+-#include <asm/vm86.h>
+-#include <asm/math_emu.h>
+-#include <asm/segment.h>
+-#include <asm/page.h>
+-#include <asm/types.h>
+-#include <asm/sigcontext.h>
+-#include <asm/cpufeature.h>
+-#include <asm/msr.h>
+-#include <asm/system.h>
+-#include <linux/cache.h>
+-#include <linux/threads.h>
+-#include <asm/percpu.h>
+-#include <linux/cpumask.h>
+-#include <linux/init.h>
+-#include <asm/processor-flags.h>
+-#include <xen/interface/physdev.h>
+-
+-/* flag for disabling the tsc */
+-#define tsc_disable 0
+-
+-struct desc_struct {
+- unsigned long a,b;
+-};
+-
+-#define desc_empty(desc) \
+- (!((desc)->a | (desc)->b))
+-
+-#define desc_equal(desc1, desc2) \
+- (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
+-/*
+- * Default implementation of macro that returns current
+- * instruction pointer ("program counter").
+- */
+-#define current_text_addr() ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
+-
+-/*
+- * CPU type and hardware bug flags. Kept separately for each CPU.
+- * Members of this structure are referenced in head.S, so think twice
+- * before touching them. [mj]
+- */
+-
+-struct cpuinfo_x86 {
+- __u8 x86; /* CPU family */
+- __u8 x86_vendor; /* CPU vendor */
+- __u8 x86_model;
+- __u8 x86_mask;
+- char wp_works_ok; /* It doesn't on 386's */
+- char hlt_works_ok; /* Problems on some 486Dx4's and old 386's */
+- char hard_math;
+- char rfu;
+- int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */
+- unsigned long x86_capability[NCAPINTS];
+- char x86_vendor_id[16];
+- char x86_model_id[64];
+- int x86_cache_size; /* in KB - valid for CPUS which support this
+- call */
+- int x86_cache_alignment; /* In bytes */
+- char fdiv_bug;
+- char f00f_bug;
+- char coma_bug;
+- char pad0;
+- int x86_power;
+- unsigned long loops_per_jiffy;
+-#ifdef CONFIG_SMP
+- cpumask_t llc_shared_map; /* cpus sharing the last level cache */
+-#endif
+- unsigned char x86_max_cores; /* cpuid returned max cores value */
+- unsigned char apicid;
+- unsigned short x86_clflush_size;
+-#ifdef CONFIG_SMP
+- unsigned char booted_cores; /* number of cores as seen by OS */
+- __u8 phys_proc_id; /* Physical processor id. */
+- __u8 cpu_core_id; /* Core id */
+- __u8 cpu_index; /* index into per_cpu list */
+-#endif
+-} __attribute__((__aligned__(SMP_CACHE_BYTES)));
+-
+-#define X86_VENDOR_INTEL 0
+-#define X86_VENDOR_CYRIX 1
+-#define X86_VENDOR_AMD 2
+-#define X86_VENDOR_UMC 3
+-#define X86_VENDOR_NEXGEN 4
+-#define X86_VENDOR_CENTAUR 5
+-#define X86_VENDOR_TRANSMETA 7
+-#define X86_VENDOR_NSC 8
+-#define X86_VENDOR_NUM 9
+-#define X86_VENDOR_UNKNOWN 0xff
+-
+-/*
+- * capabilities of CPUs
+- */
+-
+-extern struct cpuinfo_x86 boot_cpu_data;
+-extern struct cpuinfo_x86 new_cpu_data;
+-#ifndef CONFIG_X86_NO_TSS
+-extern struct tss_struct doublefault_tss;
+-DECLARE_PER_CPU(struct tss_struct, init_tss);
+-#endif
+-
+-#ifdef CONFIG_SMP
+-DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
+-#define cpu_data(cpu) per_cpu(cpu_info, cpu)
+-#define current_cpu_data cpu_data(smp_processor_id())
+-#else
+-#define cpu_data(cpu) boot_cpu_data
+-#define current_cpu_data boot_cpu_data
+-#endif
+-
+-/*
+- * the following now lives in the per cpu area:
+- * extern int cpu_llc_id[NR_CPUS];
+- */
+-DECLARE_PER_CPU(u8, cpu_llc_id);
+-extern char ignore_fpu_irq;
+-
+-void __init cpu_detect(struct cpuinfo_x86 *c);
+-
+-extern void identify_boot_cpu(void);
+-extern void identify_secondary_cpu(struct cpuinfo_x86 *);
+-extern void print_cpu_info(struct cpuinfo_x86 *);
+-extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
+-extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
+-extern unsigned short num_cache_leaves;
+-
+-#ifdef CONFIG_X86_HT
+-extern void detect_ht(struct cpuinfo_x86 *c);
+-#else
+-static inline void detect_ht(struct cpuinfo_x86 *c) {}
+-#endif
+-
+-static inline void xen_cpuid(unsigned int *eax, unsigned int *ebx,
+- unsigned int *ecx, unsigned int *edx)
+-{
+- /* ecx is often an input as well as an output. */
+- __asm__(XEN_CPUID
+- : "=a" (*eax),
+- "=b" (*ebx),
+- "=c" (*ecx),
+- "=d" (*edx)
+- : "0" (*eax), "2" (*ecx));
+-}
+-
+-#define load_cr3(pgdir) write_cr3(__pa(pgdir))
+-
+-/*
+- * Save the cr4 feature set we're using (ie
+- * Pentium 4MB enable and PPro Global page
+- * enable), so that any CPU's that boot up
+- * after us can get the correct flags.
+- */
+-extern unsigned long mmu_cr4_features;
+-
+-static inline void set_in_cr4 (unsigned long mask)
+-{
+- unsigned cr4;
+- mmu_cr4_features |= mask;
+- cr4 = read_cr4();
+- cr4 |= mask;
+- write_cr4(cr4);
+-}
+-
+-static inline void clear_in_cr4 (unsigned long mask)
+-{
+- unsigned cr4;
+- mmu_cr4_features &= ~mask;
+- cr4 = read_cr4();
+- cr4 &= ~mask;
+- write_cr4(cr4);
+-}
+-
+-/* Stop speculative execution */
+-static inline void sync_core(void)
+-{
+- int tmp;
+- asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory");
+-}
+-
+-static inline void __monitor(const void *eax, unsigned long ecx,
+- unsigned long edx)
+-{
+- /* "monitor %eax,%ecx,%edx;" */
+- asm volatile(
+- ".byte 0x0f,0x01,0xc8;"
+- : :"a" (eax), "c" (ecx), "d"(edx));
+-}
+-
+-static inline void __mwait(unsigned long eax, unsigned long ecx)
+-{
+- /* "mwait %eax,%ecx;" */
+- asm volatile(
+- ".byte 0x0f,0x01,0xc9;"
+- : :"a" (eax), "c" (ecx));
+-}
+-
+-extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
+-
+-/* from system description table in BIOS. Mostly for MCA use, but
+-others may find it useful. */
+-extern unsigned int machine_id;
+-extern unsigned int machine_submodel_id;
+-extern unsigned int BIOS_revision;
+-extern unsigned int mca_pentium_flag;
+-
+-/* Boot loader type from the setup header */
+-extern int bootloader_type;
+-
+-/*
+- * User space process size: 3GB (default).
+- */
+-#define TASK_SIZE (PAGE_OFFSET)
+-
+-/* This decides where the kernel will search for a free chunk of vm
+- * space during mmap's.
+- */
+-#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
+-
+-#define HAVE_ARCH_PICK_MMAP_LAYOUT
+-
+-extern void hard_disable_TSC(void);
+-extern void disable_TSC(void);
+-extern void hard_enable_TSC(void);
+-
+-/*
+- * Size of io_bitmap.
+- */
+-#define IO_BITMAP_BITS 65536
+-#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
+-#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
+-#ifndef CONFIG_X86_NO_TSS
+-#define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap)
+-#endif
+-#define INVALID_IO_BITMAP_OFFSET 0x8000
+-#define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000
+-
+-struct i387_fsave_struct {
+- long cwd;
+- long swd;
+- long twd;
+- long fip;
+- long fcs;
+- long foo;
+- long fos;
+- long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
+- long status; /* software status information */
+-};
+-
+-struct i387_fxsave_struct {
+- unsigned short cwd;
+- unsigned short swd;
+- unsigned short twd;
+- unsigned short fop;
+- long fip;
+- long fcs;
+- long foo;
+- long fos;
+- long mxcsr;
+- long mxcsr_mask;
+- long st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
+- long xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
+- long padding[56];
+-} __attribute__ ((aligned (16)));
+-
+-struct i387_soft_struct {
+- long cwd;
+- long swd;
+- long twd;
+- long fip;
+- long fcs;
+- long foo;
+- long fos;
+- long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
+- unsigned char ftop, changed, lookahead, no_update, rm, alimit;
+- struct info *info;
+- unsigned long entry_eip;
+-};
+-
+-union i387_union {
+- struct i387_fsave_struct fsave;
+- struct i387_fxsave_struct fxsave;
+- struct i387_soft_struct soft;
+-};
+-
+-typedef struct {
+- unsigned long seg;
+-} mm_segment_t;
+-
+-struct thread_struct;
+-
+-#ifndef CONFIG_X86_NO_TSS
+-/* This is the TSS defined by the hardware. */
+-struct i386_hw_tss {
+- unsigned short back_link,__blh;
+- unsigned long esp0;
+- unsigned short ss0,__ss0h;
+- unsigned long esp1;
+- unsigned short ss1,__ss1h; /* ss1 is used to cache MSR_IA32_SYSENTER_CS */
+- unsigned long esp2;
+- unsigned short ss2,__ss2h;
+- unsigned long __cr3;
+- unsigned long eip;
+- unsigned long eflags;
+- unsigned long eax,ecx,edx,ebx;
+- unsigned long esp;
+- unsigned long ebp;
+- unsigned long esi;
+- unsigned long edi;
+- unsigned short es, __esh;
+- unsigned short cs, __csh;
+- unsigned short ss, __ssh;
+- unsigned short ds, __dsh;
+- unsigned short fs, __fsh;
+- unsigned short gs, __gsh;
+- unsigned short ldt, __ldth;
+- unsigned short trace, io_bitmap_base;
+-} __attribute__((packed));
+-
+-struct tss_struct {
+- struct i386_hw_tss x86_tss;
+-
+- /*
+- * The extra 1 is there because the CPU will access an
+- * additional byte beyond the end of the IO permission
+- * bitmap. The extra byte must be all 1 bits, and must
+- * be within the limit.
+- */
+- unsigned long io_bitmap[IO_BITMAP_LONGS + 1];
+- /*
+- * Cache the current maximum and the last task that used the bitmap:
+- */
+- unsigned long io_bitmap_max;
+- struct thread_struct *io_bitmap_owner;
+- /*
+- * pads the TSS to be cacheline-aligned (size is 0x100)
+- */
+- unsigned long __cacheline_filler[35];
+- /*
+- * .. and then another 0x100 bytes for emergency kernel stack
+- */
+- unsigned long stack[64];
+-} __attribute__((packed));
+-#endif
+-
+-#define ARCH_MIN_TASKALIGN 16
+-
+-struct thread_struct {
+-/* cached TLS descriptors. */
+- struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
+- unsigned long esp0;
+- unsigned long sysenter_cs;
+- unsigned long eip;
+- unsigned long esp;
+- unsigned long fs;
+- unsigned long gs;
+-/* Hardware debugging registers */
+- unsigned long debugreg[8]; /* %%db0-7 debug registers */
+-/* fault info */
+- unsigned long cr2, trap_no, error_code;
+-/* floating point info */
+- union i387_union i387;
+-/* virtual 86 mode info */
+- struct vm86_struct __user * vm86_info;
+- unsigned long screen_bitmap;
+- unsigned long v86flags, v86mask, saved_esp0;
+- unsigned int saved_fs, saved_gs;
+-/* IO permissions */
+- unsigned long *io_bitmap_ptr;
+- unsigned long iopl;
+-/* max allowed port in the bitmap, in bytes: */
+- unsigned long io_bitmap_max;
+-};
+-
+-#define INIT_THREAD { \
+- .esp0 = sizeof(init_stack) + (long)&init_stack, \
+- .vm86_info = NULL, \
+- .sysenter_cs = __KERNEL_CS, \
+- .io_bitmap_ptr = NULL, \
+- .fs = __KERNEL_PERCPU, \
+-}
+-
+-/*
+- * Note that the .io_bitmap member must be extra-big. This is because
+- * the CPU will access an additional byte beyond the end of the IO
+- * permission bitmap. The extra byte must be all 1 bits, and must
+- * be within the limit.
+- */
+-#define INIT_TSS { \
+- .x86_tss = { \
+- .esp0 = sizeof(init_stack) + (long)&init_stack, \
+- .ss0 = __KERNEL_DS, \
+- .ss1 = __KERNEL_CS, \
+- .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
+- }, \
+- .io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \
+-}
+-
+-#define start_thread(regs, new_eip, new_esp) do { \
+- __asm__("movl %0,%%gs": :"r" (0)); \
+- regs->xfs = 0; \
+- set_fs(USER_DS); \
+- regs->xds = __USER_DS; \
+- regs->xes = __USER_DS; \
+- regs->xss = __USER_DS; \
+- regs->xcs = __USER_CS; \
+- regs->eip = new_eip; \
+- regs->esp = new_esp; \
+-} while (0)
+-
+-/* Forward declaration, a strange C thing */
+-struct task_struct;
+-struct mm_struct;
+-
+-/* Free all resources held by a thread. */
+-extern void release_thread(struct task_struct *);
+-
+-/* Prepare to copy thread state - unlazy all lazy status */
+-extern void prepare_to_copy(struct task_struct *tsk);
+-
+-/*
+- * create a kernel thread without removing it from tasklists
+- */
+-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+-
+-extern unsigned long thread_saved_pc(struct task_struct *tsk);
+-void show_trace(struct task_struct *task, struct pt_regs *regs, unsigned long *stack);
+-
+-unsigned long get_wchan(struct task_struct *p);
+-
+-#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
+-#define KSTK_TOP(info) \
+-({ \
+- unsigned long *__ptr = (unsigned long *)(info); \
+- (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \
+-})
+-
+-/*
+- * The below -8 is to reserve 8 bytes on top of the ring0 stack.
+- * This is necessary to guarantee that the entire "struct pt_regs"
+- * is accessable even if the CPU haven't stored the SS/ESP registers
+- * on the stack (interrupt gate does not save these registers
+- * when switching to the same priv ring).
+- * Therefore beware: accessing the xss/esp fields of the
+- * "struct pt_regs" is possible, but they may contain the
+- * completely wrong values.
+- */
+-#define task_pt_regs(task) \
+-({ \
+- struct pt_regs *__regs__; \
+- __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
+- __regs__ - 1; \
+-})
+-
+-#define KSTK_EIP(task) (task_pt_regs(task)->eip)
+-#define KSTK_ESP(task) (task_pt_regs(task)->esp)
+-
+-
+-struct microcode_header {
+- unsigned int hdrver;
+- unsigned int rev;
+- unsigned int date;
+- unsigned int sig;
+- unsigned int cksum;
+- unsigned int ldrver;
+- unsigned int pf;
+- unsigned int datasize;
+- unsigned int totalsize;
+- unsigned int reserved[3];
+-};
+-
+-struct microcode {
+- struct microcode_header hdr;
+- unsigned int bits[0];
+-};
+-
+-typedef struct microcode microcode_t;
+-typedef struct microcode_header microcode_header_t;
+-
+-/* microcode format is extended from prescott processors */
+-struct extended_signature {
+- unsigned int sig;
+- unsigned int pf;
+- unsigned int cksum;
+-};
+-
+-struct extended_sigtable {
+- unsigned int count;
+- unsigned int cksum;
+- unsigned int reserved[3];
+- struct extended_signature sigs[0];
+-};
+-
+-/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+-static inline void rep_nop(void)
+-{
+- __asm__ __volatile__("rep;nop": : :"memory");
+-}
+-
+-#define cpu_relax() rep_nop()
+-
+-#ifndef CONFIG_X86_NO_TSS
+-static inline void native_load_esp0(struct tss_struct *tss, struct thread_struct *thread)
+-{
+- tss->x86_tss.esp0 = thread->esp0;
+- /* This can only happen when SEP is enabled, no need to test "SEP"arately */
+- if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) {
+- tss->x86_tss.ss1 = thread->sysenter_cs;
+- wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
+- }
+-}
+-#else
+-#define xen_load_esp0(tss, thread) do { \
+- if (HYPERVISOR_stack_switch(__KERNEL_DS, (thread)->esp0)) \
+- BUG(); \
+-} while (0)
+-#endif
+-
+-
+-static inline unsigned long xen_get_debugreg(int regno)
+-{
+- return HYPERVISOR_get_debugreg(regno);
+-}
+-
+-static inline void xen_set_debugreg(int regno, unsigned long value)
+-{
+- WARN_ON(HYPERVISOR_set_debugreg(regno, value));
+-}
+-
+-/*
+- * Set IOPL bits in EFLAGS from given mask
+- */
+-static inline void xen_set_iopl_mask(unsigned mask)
+-{
+- struct physdev_set_iopl set_iopl;
+-
+- /* Force the change at ring 0. */
+- set_iopl.iopl = (mask == 0) ? 1 : (mask >> 12) & 3;
+- WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
+-}
+-
+-
+-#define paravirt_enabled() 0
+-#define __cpuid xen_cpuid
+-
+-#define load_esp0 xen_load_esp0
+-
+-/*
+- * These special macros can be used to get or set a debugging register
+- */
+-#define get_debugreg(var, register) \
+- (var) = xen_get_debugreg(register)
+-#define set_debugreg(value, register) \
+- xen_set_debugreg(register, value)
+-
+-#define set_iopl_mask xen_set_iopl_mask
+-
+-/*
+- * Generic CPUID function
+- * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
+- * resulting in stale register contents being returned.
+- */
+-static inline void cpuid(unsigned int op,
+- unsigned int *eax, unsigned int *ebx,
+- unsigned int *ecx, unsigned int *edx)
+-{
+- *eax = op;
+- *ecx = 0;
+- __cpuid(eax, ebx, ecx, edx);
+-}
+-
+-/* Some CPUID calls want 'count' to be placed in ecx */
+-static inline void cpuid_count(unsigned int op, int count,
+- unsigned int *eax, unsigned int *ebx,
+- unsigned int *ecx, unsigned int *edx)
+-{
+- *eax = op;
+- *ecx = count;
+- __cpuid(eax, ebx, ecx, edx);
+-}
+-
+-/*
+- * CPUID functions returning a single datum
+- */
+-static inline unsigned int cpuid_eax(unsigned int op)
+-{
+- unsigned int eax, ebx, ecx, edx;
+-
+- cpuid(op, &eax, &ebx, &ecx, &edx);
+- return eax;
+-}
+-static inline unsigned int cpuid_ebx(unsigned int op)
+-{
+- unsigned int eax, ebx, ecx, edx;
+-
+- cpuid(op, &eax, &ebx, &ecx, &edx);
+- return ebx;
+-}
+-static inline unsigned int cpuid_ecx(unsigned int op)
+-{
+- unsigned int eax, ebx, ecx, edx;
+-
+- cpuid(op, &eax, &ebx, &ecx, &edx);
+- return ecx;
+-}
+-static inline unsigned int cpuid_edx(unsigned int op)
+-{
+- unsigned int eax, ebx, ecx, edx;
+-
+- cpuid(op, &eax, &ebx, &ecx, &edx);
+- return edx;
+-}
+-
+-/* generic versions from gas */
+-#define GENERIC_NOP1 ".byte 0x90\n"
+-#define GENERIC_NOP2 ".byte 0x89,0xf6\n"
+-#define GENERIC_NOP3 ".byte 0x8d,0x76,0x00\n"
+-#define GENERIC_NOP4 ".byte 0x8d,0x74,0x26,0x00\n"
+-#define GENERIC_NOP5 GENERIC_NOP1 GENERIC_NOP4
+-#define GENERIC_NOP6 ".byte 0x8d,0xb6,0x00,0x00,0x00,0x00\n"
+-#define GENERIC_NOP7 ".byte 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00\n"
+-#define GENERIC_NOP8 GENERIC_NOP1 GENERIC_NOP7
+-
+-/* Opteron nops */
+-#define K8_NOP1 GENERIC_NOP1
+-#define K8_NOP2 ".byte 0x66,0x90\n"
+-#define K8_NOP3 ".byte 0x66,0x66,0x90\n"
+-#define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n"
+-#define K8_NOP5 K8_NOP3 K8_NOP2
+-#define K8_NOP6 K8_NOP3 K8_NOP3
+-#define K8_NOP7 K8_NOP4 K8_NOP3
+-#define K8_NOP8 K8_NOP4 K8_NOP4
+-
+-/* K7 nops */
+-/* uses eax dependencies (arbitary choice) */
+-#define K7_NOP1 GENERIC_NOP1
+-#define K7_NOP2 ".byte 0x8b,0xc0\n"
+-#define K7_NOP3 ".byte 0x8d,0x04,0x20\n"
+-#define K7_NOP4 ".byte 0x8d,0x44,0x20,0x00\n"
+-#define K7_NOP5 K7_NOP4 ASM_NOP1
+-#define K7_NOP6 ".byte 0x8d,0x80,0,0,0,0\n"
+-#define K7_NOP7 ".byte 0x8D,0x04,0x05,0,0,0,0\n"
+-#define K7_NOP8 K7_NOP7 ASM_NOP1
+-
+-/* P6 nops */
+-/* uses eax dependencies (Intel-recommended choice) */
+-#define P6_NOP1 GENERIC_NOP1
+-#define P6_NOP2 ".byte 0x66,0x90\n"
+-#define P6_NOP3 ".byte 0x0f,0x1f,0x00\n"
+-#define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n"
+-#define P6_NOP5 ".byte 0x0f,0x1f,0x44,0x00,0\n"
+-#define P6_NOP6 ".byte 0x66,0x0f,0x1f,0x44,0x00,0\n"
+-#define P6_NOP7 ".byte 0x0f,0x1f,0x80,0,0,0,0\n"
+-#define P6_NOP8 ".byte 0x0f,0x1f,0x84,0x00,0,0,0,0\n"
+-
+-#ifdef CONFIG_MK8
+-#define ASM_NOP1 K8_NOP1
+-#define ASM_NOP2 K8_NOP2
+-#define ASM_NOP3 K8_NOP3
+-#define ASM_NOP4 K8_NOP4
+-#define ASM_NOP5 K8_NOP5
+-#define ASM_NOP6 K8_NOP6
+-#define ASM_NOP7 K8_NOP7
+-#define ASM_NOP8 K8_NOP8
+-#elif defined(CONFIG_MK7)
+-#define ASM_NOP1 K7_NOP1
+-#define ASM_NOP2 K7_NOP2
+-#define ASM_NOP3 K7_NOP3
+-#define ASM_NOP4 K7_NOP4
+-#define ASM_NOP5 K7_NOP5
+-#define ASM_NOP6 K7_NOP6
+-#define ASM_NOP7 K7_NOP7
+-#define ASM_NOP8 K7_NOP8
+-#elif defined(CONFIG_M686) || defined(CONFIG_MPENTIUMII) || \
+- defined(CONFIG_MPENTIUMIII) || defined(CONFIG_MPENTIUMM) || \
+- defined(CONFIG_MCORE2) || defined(CONFIG_PENTIUM4)
+-#define ASM_NOP1 P6_NOP1
+-#define ASM_NOP2 P6_NOP2
+-#define ASM_NOP3 P6_NOP3
+-#define ASM_NOP4 P6_NOP4
+-#define ASM_NOP5 P6_NOP5
+-#define ASM_NOP6 P6_NOP6
+-#define ASM_NOP7 P6_NOP7
+-#define ASM_NOP8 P6_NOP8
+-#else
+-#define ASM_NOP1 GENERIC_NOP1
+-#define ASM_NOP2 GENERIC_NOP2
+-#define ASM_NOP3 GENERIC_NOP3
+-#define ASM_NOP4 GENERIC_NOP4
+-#define ASM_NOP5 GENERIC_NOP5
+-#define ASM_NOP6 GENERIC_NOP6
+-#define ASM_NOP7 GENERIC_NOP7
+-#define ASM_NOP8 GENERIC_NOP8
+-#endif
+-
+-#define ASM_NOP_MAX 8
+-
+-/* Prefetch instructions for Pentium III and AMD Athlon */
+-/* It's not worth to care about 3dnow! prefetches for the K6
+- because they are microcoded there and very slow.
+- However we don't do prefetches for pre XP Athlons currently
+- That should be fixed. */
+-#define ARCH_HAS_PREFETCH
+-static inline void prefetch(const void *x)
+-{
+- alternative_input(ASM_NOP4,
+- "prefetchnta (%1)",
+- X86_FEATURE_XMM,
+- "r" (x));
+-}
+-
+-#define ARCH_HAS_PREFETCH
+-#define ARCH_HAS_PREFETCHW
+-#define ARCH_HAS_SPINLOCK_PREFETCH
+-
+-/* 3dnow! prefetch to get an exclusive cache line. Useful for
+- spinlocks to avoid one state transition in the cache coherency protocol. */
+-static inline void prefetchw(const void *x)
+-{
+- alternative_input(ASM_NOP4,
+- "prefetchw (%1)",
+- X86_FEATURE_3DNOW,
+- "r" (x));
+-}
+-#define spin_lock_prefetch(x) prefetchw(x)
+-
+-extern void select_idle_routine(const struct cpuinfo_x86 *c);
+-
+-#define cache_line_size() (boot_cpu_data.x86_cache_alignment)
+-
+-extern unsigned long boot_option_idle_override;
+-extern void enable_sep_cpu(void);
+-extern int sysenter_setup(void);
+-
+-/* Defined in head.S */
+-extern struct Xgt_desc_struct early_gdt_descr;
+-
+-extern void cpu_set_gdt(int);
+-extern void switch_to_new_gdt(void);
+-extern void cpu_init(void);
+-extern void init_gdt(int cpu);
+-
+-extern int force_mwait;
+-
+-#endif /* __ASM_I386_PROCESSOR_H */
+--- a/include/asm-x86/mach-xen/asm/processor_64.h
++++ /dev/null
+@@ -1,461 +0,0 @@
+-/*
+- * include/asm-x86_64/processor.h
+- *
+- * Copyright (C) 1994 Linus Torvalds
+- */
+-
+-#ifndef __ASM_X86_64_PROCESSOR_H
+-#define __ASM_X86_64_PROCESSOR_H
+-
+-#include <asm/segment.h>
+-#include <asm/page.h>
+-#include <asm/types.h>
+-#include <asm/sigcontext.h>
+-#include <asm/cpufeature.h>
+-#include <linux/threads.h>
+-#include <asm/msr.h>
+-#include <asm/current.h>
+-#include <asm/system.h>
+-#include <asm/mmsegment.h>
+-#include <asm/percpu.h>
+-#include <linux/personality.h>
+-#include <linux/cpumask.h>
+-#include <asm/processor-flags.h>
+-
+-#define TF_MASK 0x00000100
+-#define IF_MASK 0x00000200
+-#define IOPL_MASK 0x00003000
+-#define NT_MASK 0x00004000
+-#define VM_MASK 0x00020000
+-#define AC_MASK 0x00040000
+-#define VIF_MASK 0x00080000 /* virtual interrupt flag */
+-#define VIP_MASK 0x00100000 /* virtual interrupt pending */
+-#define ID_MASK 0x00200000
+-
+-#define desc_empty(desc) \
+- (!((desc)->a | (desc)->b))
+-
+-#define desc_equal(desc1, desc2) \
+- (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
+-
+-/*
+- * Default implementation of macro that returns current
+- * instruction pointer ("program counter").
+- */
+-#define current_text_addr() ({ void *pc; asm volatile("leaq 1f(%%rip),%0\n1:":"=r"(pc)); pc; })
+-
+-/*
+- * CPU type and hardware bug flags. Kept separately for each CPU.
+- */
+-
+-struct cpuinfo_x86 {
+- __u8 x86; /* CPU family */
+- __u8 x86_vendor; /* CPU vendor */
+- __u8 x86_model;
+- __u8 x86_mask;
+- int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */
+- __u32 x86_capability[NCAPINTS];
+- char x86_vendor_id[16];
+- char x86_model_id[64];
+- int x86_cache_size; /* in KB */
+- int x86_clflush_size;
+- int x86_cache_alignment;
+- int x86_tlbsize; /* number of 4K pages in DTLB/ITLB combined(in pages)*/
+- __u8 x86_virt_bits, x86_phys_bits;
+- __u8 x86_max_cores; /* cpuid returned max cores value */
+- __u32 x86_power;
+- __u32 extended_cpuid_level; /* Max extended CPUID function supported */
+- unsigned long loops_per_jiffy;
+-#ifdef CONFIG_SMP
+- cpumask_t llc_shared_map; /* cpus sharing the last level cache */
+-#endif
+- __u8 apicid;
+-#ifdef CONFIG_SMP
+- __u8 booted_cores; /* number of cores as seen by OS */
+- __u8 phys_proc_id; /* Physical Processor id. */
+- __u8 cpu_core_id; /* Core id. */
+- __u8 cpu_index; /* index into per_cpu list */
+-#endif
+-} ____cacheline_aligned;
+-
+-#define X86_VENDOR_INTEL 0
+-#define X86_VENDOR_CYRIX 1
+-#define X86_VENDOR_AMD 2
+-#define X86_VENDOR_UMC 3
+-#define X86_VENDOR_NEXGEN 4
+-#define X86_VENDOR_CENTAUR 5
+-#define X86_VENDOR_TRANSMETA 7
+-#define X86_VENDOR_NUM 8
+-#define X86_VENDOR_UNKNOWN 0xff
+-
+-#ifdef CONFIG_SMP
+-DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
+-#define cpu_data(cpu) per_cpu(cpu_info, cpu)
+-#define current_cpu_data cpu_data(smp_processor_id())
+-#else
+-#define cpu_data(cpu) boot_cpu_data
+-#define current_cpu_data boot_cpu_data
+-#endif
+-
+-extern char ignore_irq13;
+-
+-extern void identify_cpu(struct cpuinfo_x86 *);
+-extern void print_cpu_info(struct cpuinfo_x86 *);
+-extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
+-extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
+-extern unsigned short num_cache_leaves;
+-
+-/*
+- * Save the cr4 feature set we're using (ie
+- * Pentium 4MB enable and PPro Global page
+- * enable), so that any CPU's that boot up
+- * after us can get the correct flags.
+- */
+-extern unsigned long mmu_cr4_features;
+-
+-static inline void set_in_cr4 (unsigned long mask)
+-{
+- mmu_cr4_features |= mask;
+- __asm__("movq %%cr4,%%rax\n\t"
+- "orq %0,%%rax\n\t"
+- "movq %%rax,%%cr4\n"
+- : : "irg" (mask)
+- :"ax");
+-}
+-
+-static inline void clear_in_cr4 (unsigned long mask)
+-{
+- mmu_cr4_features &= ~mask;
+- __asm__("movq %%cr4,%%rax\n\t"
+- "andq %0,%%rax\n\t"
+- "movq %%rax,%%cr4\n"
+- : : "irg" (~mask)
+- :"ax");
+-}
+-
+-
+-/*
+- * User space process size. 47bits minus one guard page.
+- */
+-#define TASK_SIZE64 (0x800000000000UL - 4096)
+-
+-/* This decides where the kernel will search for a free chunk of vm
+- * space during mmap's.
+- */
+-#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000)
+-
+-#define TASK_SIZE (test_thread_flag(TIF_IA32) ? IA32_PAGE_OFFSET : TASK_SIZE64)
+-#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64)
+-
+-#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE/3)
+-
+-/*
+- * Size of io_bitmap.
+- */
+-#define IO_BITMAP_BITS 65536
+-#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
+-#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
+-#ifndef CONFIG_X86_NO_TSS
+-#define IO_BITMAP_OFFSET offsetof(struct tss_struct,io_bitmap)
+-#endif
+-#define INVALID_IO_BITMAP_OFFSET 0x8000
+-
+-struct i387_fxsave_struct {
+- u16 cwd;
+- u16 swd;
+- u16 twd;
+- u16 fop;
+- u64 rip;
+- u64 rdp;
+- u32 mxcsr;
+- u32 mxcsr_mask;
+- u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
+- u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
+- u32 padding[24];
+-} __attribute__ ((aligned (16)));
+-
+-union i387_union {
+- struct i387_fxsave_struct fxsave;
+-};
+-
+-#ifndef CONFIG_X86_NO_TSS
+-struct tss_struct {
+- u32 reserved1;
+- u64 rsp0;
+- u64 rsp1;
+- u64 rsp2;
+- u64 reserved2;
+- u64 ist[7];
+- u32 reserved3;
+- u32 reserved4;
+- u16 reserved5;
+- u16 io_bitmap_base;
+- /*
+- * The extra 1 is there because the CPU will access an
+- * additional byte beyond the end of the IO permission
+- * bitmap. The extra byte must be all 1 bits, and must
+- * be within the limit. Thus we have:
+- *
+- * 128 bytes, the bitmap itself, for ports 0..0x3ff
+- * 8 bytes, for an extra "long" of ~0UL
+- */
+- unsigned long io_bitmap[IO_BITMAP_LONGS + 1];
+-} __attribute__((packed)) ____cacheline_aligned;
+-
+-DECLARE_PER_CPU(struct tss_struct,init_tss);
+-#endif
+-
+-
+-extern struct cpuinfo_x86 boot_cpu_data;
+-#ifndef CONFIG_X86_NO_TSS
+-/* Save the original ist values for checking stack pointers during debugging */
+-struct orig_ist {
+- unsigned long ist[7];
+-};
+-DECLARE_PER_CPU(struct orig_ist, orig_ist);
+-#endif
+-
+-#ifdef CONFIG_X86_VSMP
+-#define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT)
+-#define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT)
+-#else
+-#define ARCH_MIN_TASKALIGN 16
+-#define ARCH_MIN_MMSTRUCT_ALIGN 0
+-#endif
+-
+-struct thread_struct {
+- unsigned long rsp0;
+- unsigned long rsp;
+- unsigned long userrsp; /* Copy from PDA */
+- unsigned long fs;
+- unsigned long gs;
+- unsigned short es, ds, fsindex, gsindex;
+-/* Hardware debugging registers */
+- unsigned long debugreg0;
+- unsigned long debugreg1;
+- unsigned long debugreg2;
+- unsigned long debugreg3;
+- unsigned long debugreg6;
+- unsigned long debugreg7;
+-/* fault info */
+- unsigned long cr2, trap_no, error_code;
+-/* floating point info */
+- union i387_union i387 __attribute__((aligned(16)));
+-/* IO permissions. the bitmap could be moved into the GDT, that would make
+- switch faster for a limited number of ioperm using tasks. -AK */
+- int ioperm;
+- unsigned long *io_bitmap_ptr;
+- unsigned io_bitmap_max;
+-/* cached TLS descriptors. */
+- u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
+- unsigned int iopl;
+-} __attribute__((aligned(16)));
+-
+-#define INIT_THREAD { \
+- .rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+-}
+-
+-#ifndef CONFIG_X86_NO_TSS
+-#define INIT_TSS { \
+- .rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+-}
+-#endif
+-
+-#define INIT_MMAP \
+-{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
+-
+-#define start_thread(regs,new_rip,new_rsp) do { \
+- asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \
+- load_gs_index(0); \
+- (regs)->rip = (new_rip); \
+- (regs)->rsp = (new_rsp); \
+- write_pda(oldrsp, (new_rsp)); \
+- (regs)->cs = __USER_CS; \
+- (regs)->ss = __USER_DS; \
+- (regs)->eflags = 0x200; \
+- set_fs(USER_DS); \
+-} while(0)
+-
+-#define get_debugreg(var, register) \
+- var = HYPERVISOR_get_debugreg(register)
+-#define set_debugreg(value, register) do { \
+- if (HYPERVISOR_set_debugreg(register, value)) \
+- BUG(); \
+-} while (0)
+-
+-struct task_struct;
+-struct mm_struct;
+-
+-/* Free all resources held by a thread. */
+-extern void release_thread(struct task_struct *);
+-
+-/* Prepare to copy thread state - unlazy all lazy status */
+-extern void prepare_to_copy(struct task_struct *tsk);
+-
+-/*
+- * create a kernel thread without removing it from tasklists
+- */
+-extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+-
+-/*
+- * Return saved PC of a blocked thread.
+- * What is this good for? it will be always the scheduler or ret_from_fork.
+- */
+-#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.rsp - 8))
+-
+-extern unsigned long get_wchan(struct task_struct *p);
+-#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.rsp0 - 1)
+-#define KSTK_EIP(tsk) (task_pt_regs(tsk)->rip)
+-#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
+-
+-
+-struct microcode_header {
+- unsigned int hdrver;
+- unsigned int rev;
+- unsigned int date;
+- unsigned int sig;
+- unsigned int cksum;
+- unsigned int ldrver;
+- unsigned int pf;
+- unsigned int datasize;
+- unsigned int totalsize;
+- unsigned int reserved[3];
+-};
+-
+-struct microcode {
+- struct microcode_header hdr;
+- unsigned int bits[0];
+-};
+-
+-typedef struct microcode microcode_t;
+-typedef struct microcode_header microcode_header_t;
+-
+-/* microcode format is extended from prescott processors */
+-struct extended_signature {
+- unsigned int sig;
+- unsigned int pf;
+- unsigned int cksum;
+-};
+-
+-struct extended_sigtable {
+- unsigned int count;
+- unsigned int cksum;
+- unsigned int reserved[3];
+- struct extended_signature sigs[0];
+-};
+-
+-
+-#if defined(CONFIG_MPSC) || defined(CONFIG_MCORE2)
+-#define ASM_NOP1 P6_NOP1
+-#define ASM_NOP2 P6_NOP2
+-#define ASM_NOP3 P6_NOP3
+-#define ASM_NOP4 P6_NOP4
+-#define ASM_NOP5 P6_NOP5
+-#define ASM_NOP6 P6_NOP6
+-#define ASM_NOP7 P6_NOP7
+-#define ASM_NOP8 P6_NOP8
+-#else
+-#define ASM_NOP1 K8_NOP1
+-#define ASM_NOP2 K8_NOP2
+-#define ASM_NOP3 K8_NOP3
+-#define ASM_NOP4 K8_NOP4
+-#define ASM_NOP5 K8_NOP5
+-#define ASM_NOP6 K8_NOP6
+-#define ASM_NOP7 K8_NOP7
+-#define ASM_NOP8 K8_NOP8
+-#endif
+-
+-/* Opteron nops */
+-#define K8_NOP1 ".byte 0x90\n"
+-#define K8_NOP2 ".byte 0x66,0x90\n"
+-#define K8_NOP3 ".byte 0x66,0x66,0x90\n"
+-#define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n"
+-#define K8_NOP5 K8_NOP3 K8_NOP2
+-#define K8_NOP6 K8_NOP3 K8_NOP3
+-#define K8_NOP7 K8_NOP4 K8_NOP3
+-#define K8_NOP8 K8_NOP4 K8_NOP4
+-
+-/* P6 nops */
+-/* uses eax dependencies (Intel-recommended choice) */
+-#define P6_NOP1 ".byte 0x90\n"
+-#define P6_NOP2 ".byte 0x66,0x90\n"
+-#define P6_NOP3 ".byte 0x0f,0x1f,0x00\n"
+-#define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n"
+-#define P6_NOP5 ".byte 0x0f,0x1f,0x44,0x00,0\n"
+-#define P6_NOP6 ".byte 0x66,0x0f,0x1f,0x44,0x00,0\n"
+-#define P6_NOP7 ".byte 0x0f,0x1f,0x80,0,0,0,0\n"
+-#define P6_NOP8 ".byte 0x0f,0x1f,0x84,0x00,0,0,0,0\n"
+-
+-#define ASM_NOP_MAX 8
+-
+-/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+-static inline void rep_nop(void)
+-{
+- __asm__ __volatile__("rep;nop": : :"memory");
+-}
+-
+-/* Stop speculative execution */
+-static inline void sync_core(void)
+-{
+- int tmp;
+- asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory");
+-}
+-
+-#define ARCH_HAS_PREFETCHW 1
+-static inline void prefetchw(void *x)
+-{
+- alternative_input("prefetcht0 (%1)",
+- "prefetchw (%1)",
+- X86_FEATURE_3DNOW,
+- "r" (x));
+-}
+-
+-#define ARCH_HAS_SPINLOCK_PREFETCH 1
+-
+-#define spin_lock_prefetch(x) prefetchw(x)
+-
+-#define cpu_relax() rep_nop()
+-
+-static inline void __monitor(const void *eax, unsigned long ecx,
+- unsigned long edx)
+-{
+- /* "monitor %eax,%ecx,%edx;" */
+- asm volatile(
+- ".byte 0x0f,0x01,0xc8;"
+- : :"a" (eax), "c" (ecx), "d"(edx));
+-}
+-
+-static inline void __mwait(unsigned long eax, unsigned long ecx)
+-{
+- /* "mwait %eax,%ecx;" */
+- asm volatile(
+- ".byte 0x0f,0x01,0xc9;"
+- : :"a" (eax), "c" (ecx));
+-}
+-
+-static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
+-{
+- /* "mwait %eax,%ecx;" */
+- asm volatile(
+- "sti; .byte 0x0f,0x01,0xc9;"
+- : :"a" (eax), "c" (ecx));
+-}
+-
+-extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
+-
+-#define stack_current() \
+-({ \
+- struct thread_info *ti; \
+- asm("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
+- ti->task; \
+-})
+-
+-#define cache_line_size() (boot_cpu_data.x86_cache_alignment)
+-
+-extern unsigned long boot_option_idle_override;
+-/* Boot loader type from the setup header */
+-extern int bootloader_type;
+-
+-#define HAVE_ARCH_PICK_MMAP_LAYOUT 1
+-
+-#endif /* __ASM_X86_64_PROCESSOR_H */
+--- a/include/asm-x86/mach-xen/asm/processor.h
++++ b/include/asm-x86/mach-xen/asm/processor.h
+@@ -1,5 +1,793 @@
++#ifndef __ASM_X86_PROCESSOR_H
++#define __ASM_X86_PROCESSOR_H
++
++#include <asm/processor-flags.h>
++
++/* migration helpers, for KVM - will be removed in 2.6.25: */
++#include <asm/vm86.h>
++#define Xgt_desc_struct desc_ptr
++
++/* Forward declaration, a strange C thing */
++struct task_struct;
++struct mm_struct;
++
++#include <asm/vm86.h>
++#include <asm/math_emu.h>
++#include <asm/segment.h>
++#include <asm/types.h>
++#include <asm/sigcontext.h>
++#include <asm/current.h>
++#include <asm/cpufeature.h>
++#include <asm/system.h>
++#include <asm/page.h>
++#include <asm/percpu.h>
++#include <asm/msr.h>
++#include <asm/desc_defs.h>
++#include <asm/nops.h>
++#include <linux/personality.h>
++#include <linux/cpumask.h>
++#include <linux/cache.h>
++#include <linux/threads.h>
++#include <linux/init.h>
++#include <xen/interface/physdev.h>
++
++/*
++ * Default implementation of macro that returns current
++ * instruction pointer ("program counter").
++ */
++static inline void *current_text_addr(void)
++{
++ void *pc;
++ asm volatile("mov $1f,%0\n1:":"=r" (pc));
++ return pc;
++}
++
++#ifdef CONFIG_X86_VSMP
++#define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT)
++#define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT)
++#else
++#define ARCH_MIN_TASKALIGN 16
++#define ARCH_MIN_MMSTRUCT_ALIGN 0
++#endif
++
++/*
++ * CPU type and hardware bug flags. Kept separately for each CPU.
++ * Members of this structure are referenced in head.S, so think twice
++ * before touching them. [mj]
++ */
++
++struct cpuinfo_x86 {
++ __u8 x86; /* CPU family */
++ __u8 x86_vendor; /* CPU vendor */
++ __u8 x86_model;
++ __u8 x86_mask;
++#ifdef CONFIG_X86_32
++ char wp_works_ok; /* It doesn't on 386's */
++ char hlt_works_ok; /* Problems on some 486Dx4's and old 386's */
++ char hard_math;
++ char rfu;
++ char fdiv_bug;
++ char f00f_bug;
++ char coma_bug;
++ char pad0;
++#else
++ /* number of 4K pages in DTLB/ITLB combined(in pages)*/
++ int x86_tlbsize;
++ __u8 x86_virt_bits, x86_phys_bits;
++ /* cpuid returned core id bits */
++ __u8 x86_coreid_bits;
++ /* Max extended CPUID function supported */
++ __u32 extended_cpuid_level;
++#endif
++ int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */
++ __u32 x86_capability[NCAPINTS];
++ char x86_vendor_id[16];
++ char x86_model_id[64];
++ int x86_cache_size; /* in KB - valid for CPUS which support this
++ call */
++ int x86_cache_alignment; /* In bytes */
++ int x86_power;
++ unsigned long loops_per_jiffy;
++#ifdef CONFIG_SMP
++ cpumask_t llc_shared_map; /* cpus sharing the last level cache */
++#endif
++ u16 x86_max_cores; /* cpuid returned max cores value */
++ u16 apicid;
++ u16 x86_clflush_size;
++#ifdef CONFIG_SMP
++ u16 booted_cores; /* number of cores as seen by OS */
++ u16 phys_proc_id; /* Physical processor id. */
++ u16 cpu_core_id; /* Core id */
++ u16 cpu_index; /* index into per_cpu list */
++#endif
++} __attribute__((__aligned__(SMP_CACHE_BYTES)));
++
++#define X86_VENDOR_INTEL 0
++#define X86_VENDOR_CYRIX 1
++#define X86_VENDOR_AMD 2
++#define X86_VENDOR_UMC 3
++#define X86_VENDOR_NEXGEN 4
++#define X86_VENDOR_CENTAUR 5
++#define X86_VENDOR_TRANSMETA 7
++#define X86_VENDOR_NSC 8
++#define X86_VENDOR_NUM 9
++#define X86_VENDOR_UNKNOWN 0xff
++
++/*
++ * capabilities of CPUs
++ */
++extern struct cpuinfo_x86 boot_cpu_data;
++extern struct cpuinfo_x86 new_cpu_data;
++extern __u32 cleared_cpu_caps[NCAPINTS];
++
++#ifdef CONFIG_SMP
++DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
++#define cpu_data(cpu) per_cpu(cpu_info, cpu)
++#define current_cpu_data cpu_data(smp_processor_id())
++#else
++#define cpu_data(cpu) boot_cpu_data
++#define current_cpu_data boot_cpu_data
++#endif
++
++void cpu_detect(struct cpuinfo_x86 *c);
++
++extern void identify_cpu(struct cpuinfo_x86 *);
++extern void identify_boot_cpu(void);
++extern void identify_secondary_cpu(struct cpuinfo_x86 *);
++extern void print_cpu_info(struct cpuinfo_x86 *);
++extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
++extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
++extern unsigned short num_cache_leaves;
++
++#if defined(CONFIG_X86_HT) || defined(CONFIG_X86_64)
++extern void detect_ht(struct cpuinfo_x86 *c);
++#else
++static inline void detect_ht(struct cpuinfo_x86 *c) {}
++#endif
++
++static inline void xen_cpuid(unsigned int *eax, unsigned int *ebx,
++ unsigned int *ecx, unsigned int *edx)
++{
++ /* ecx is often an input as well as an output. */
++ __asm__(XEN_CPUID
++ : "=a" (*eax),
++ "=b" (*ebx),
++ "=c" (*ecx),
++ "=d" (*edx)
++ : "0" (*eax), "2" (*ecx));
++}
++
++static inline void load_cr3(pgd_t *pgdir)
++{
++ write_cr3(__pa(pgdir));
++}
++
++#ifndef CONFIG_X86_NO_TSS
++#ifdef CONFIG_X86_32
++/* This is the TSS defined by the hardware. */
++struct x86_hw_tss {
++ unsigned short back_link, __blh;
++ unsigned long sp0;
++ unsigned short ss0, __ss0h;
++ unsigned long sp1;
++ unsigned short ss1, __ss1h; /* ss1 caches MSR_IA32_SYSENTER_CS */
++ unsigned long sp2;
++ unsigned short ss2, __ss2h;
++ unsigned long __cr3;
++ unsigned long ip;
++ unsigned long flags;
++ unsigned long ax, cx, dx, bx;
++ unsigned long sp, bp, si, di;
++ unsigned short es, __esh;
++ unsigned short cs, __csh;
++ unsigned short ss, __ssh;
++ unsigned short ds, __dsh;
++ unsigned short fs, __fsh;
++ unsigned short gs, __gsh;
++ unsigned short ldt, __ldth;
++ unsigned short trace, io_bitmap_base;
++} __attribute__((packed));
++extern struct tss_struct doublefault_tss;
++#else
++struct x86_hw_tss {
++ u32 reserved1;
++ u64 sp0;
++ u64 sp1;
++ u64 sp2;
++ u64 reserved2;
++ u64 ist[7];
++ u32 reserved3;
++ u32 reserved4;
++ u16 reserved5;
++ u16 io_bitmap_base;
++} __attribute__((packed)) ____cacheline_aligned;
++#endif
++#endif /* CONFIG_X86_NO_TSS */
++
++/*
++ * Size of io_bitmap.
++ */
++#define IO_BITMAP_BITS 65536
++#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
++#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
++#define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap)
++#define INVALID_IO_BITMAP_OFFSET 0x8000
++#define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000
++
++#ifndef CONFIG_X86_NO_TSS
++struct tss_struct {
++ struct x86_hw_tss x86_tss;
++
++ /*
++ * The extra 1 is there because the CPU will access an
++ * additional byte beyond the end of the IO permission
++ * bitmap. The extra byte must be all 1 bits, and must
++ * be within the limit.
++ */
++ unsigned long io_bitmap[IO_BITMAP_LONGS + 1];
++ /*
++ * Cache the current maximum and the last task that used the bitmap:
++ */
++ unsigned long io_bitmap_max;
++ struct thread_struct *io_bitmap_owner;
++ /*
++ * pads the TSS to be cacheline-aligned (size is 0x100)
++ */
++ unsigned long __cacheline_filler[35];
++ /*
++ * .. and then another 0x100 bytes for emergency kernel stack
++ */
++ unsigned long stack[64];
++} __attribute__((packed));
++
++DECLARE_PER_CPU(struct tss_struct, init_tss);
++
++/* Save the original ist values for checking stack pointers during debugging */
++struct orig_ist {
++ unsigned long ist[7];
++};
++#endif /* CONFIG_X86_NO_TSS */
++
++#define MXCSR_DEFAULT 0x1f80
++
++struct i387_fsave_struct {
++ u32 cwd;
++ u32 swd;
++ u32 twd;
++ u32 fip;
++ u32 fcs;
++ u32 foo;
++ u32 fos;
++ u32 st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
++ u32 status; /* software status information */
++};
++
++struct i387_fxsave_struct {
++ u16 cwd;
++ u16 swd;
++ u16 twd;
++ u16 fop;
++ union {
++ struct {
++ u64 rip;
++ u64 rdp;
++ };
++ struct {
++ u32 fip;
++ u32 fcs;
++ u32 foo;
++ u32 fos;
++ };
++ };
++ u32 mxcsr;
++ u32 mxcsr_mask;
++ u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
++ u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
++ u32 padding[24];
++} __attribute__((aligned(16)));
++
++struct i387_soft_struct {
++ u32 cwd;
++ u32 swd;
++ u32 twd;
++ u32 fip;
++ u32 fcs;
++ u32 foo;
++ u32 fos;
++ u32 st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
++ u8 ftop, changed, lookahead, no_update, rm, alimit;
++ struct info *info;
++ u32 entry_eip;
++};
++
++union i387_union {
++ struct i387_fsave_struct fsave;
++ struct i387_fxsave_struct fxsave;
++ struct i387_soft_struct soft;
++};
++
++#ifdef CONFIG_X86_32
++DECLARE_PER_CPU(u8, cpu_llc_id);
++#elif !defined(CONFIG_X86_NO_TSS)
++DECLARE_PER_CPU(struct orig_ist, orig_ist);
++#endif
++
++extern void print_cpu_info(struct cpuinfo_x86 *);
++extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
++extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
++extern unsigned short num_cache_leaves;
++
++struct thread_struct {
++/* cached TLS descriptors. */
++ struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
++ unsigned long sp0;
++ unsigned long sp;
++#ifdef CONFIG_X86_32
++ unsigned long sysenter_cs;
++#else
++ unsigned long usersp; /* Copy from PDA */
++ unsigned short es, ds, fsindex, gsindex;
++#endif
++ unsigned long ip;
++ unsigned long fs;
++ unsigned long gs;
++/* Hardware debugging registers */
++ unsigned long debugreg0;
++ unsigned long debugreg1;
++ unsigned long debugreg2;
++ unsigned long debugreg3;
++ unsigned long debugreg6;
++ unsigned long debugreg7;
++/* fault info */
++ unsigned long cr2, trap_no, error_code;
++/* floating point info */
++ union i387_union i387 __attribute__((aligned(16)));;
++#ifdef CONFIG_X86_32
++/* virtual 86 mode info */
++ struct vm86_struct __user *vm86_info;
++ unsigned long screen_bitmap;
++ unsigned long v86flags, v86mask, saved_sp0;
++ unsigned int saved_fs, saved_gs;
++#endif
++/* IO permissions */
++ unsigned long *io_bitmap_ptr;
++ unsigned long iopl;
++/* max allowed port in the bitmap, in bytes: */
++ unsigned io_bitmap_max;
++/* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */
++ unsigned long debugctlmsr;
++/* Debug Store - if not 0 points to a DS Save Area configuration;
++ * goes into MSR_IA32_DS_AREA */
++ unsigned long ds_area_msr;
++};
++
++static inline unsigned long xen_get_debugreg(int regno)
++{
++ return HYPERVISOR_get_debugreg(regno);
++}
++
++static inline void xen_set_debugreg(int regno, unsigned long value)
++{
++ WARN_ON(HYPERVISOR_set_debugreg(regno, value));
++}
++
++/*
++ * Set IOPL bits in EFLAGS from given mask
++ */
++static inline void xen_set_iopl_mask(unsigned mask)
++{
++ struct physdev_set_iopl set_iopl;
++
++ /* Force the change at ring 0. */
++ set_iopl.iopl = (mask == 0) ? 1 : (mask >> 12) & 3;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
++}
++
++#ifndef CONFIG_X86_NO_TSS
++static inline void native_load_sp0(struct tss_struct *tss,
++ struct thread_struct *thread)
++{
++ tss->x86_tss.sp0 = thread->sp0;
++#ifdef CONFIG_X86_32
++ /* Only happens when SEP is enabled, no need to test "SEP"arately */
++ if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) {
++ tss->x86_tss.ss1 = thread->sysenter_cs;
++ wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
++ }
++#endif
++}
++#else
++#define xen_load_sp0(tss, thread) do { \
++ if (HYPERVISOR_stack_switch(__KERNEL_DS, (thread)->sp0)) \
++ BUG(); \
++} while (0)
++#endif
++
++#define __cpuid xen_cpuid
++#define paravirt_enabled() 0
++
++/*
++ * These special macros can be used to get or set a debugging register
++ */
++#define get_debugreg(var, register) \
++ (var) = xen_get_debugreg(register)
++#define set_debugreg(value, register) \
++ xen_set_debugreg(register, value)
++
++#define load_sp0 xen_load_sp0
++
++#define set_iopl_mask xen_set_iopl_mask
++
++/*
++ * Save the cr4 feature set we're using (ie
++ * Pentium 4MB enable and PPro Global page
++ * enable), so that any CPU's that boot up
++ * after us can get the correct flags.
++ */
++extern unsigned long mmu_cr4_features;
++
++static inline void set_in_cr4(unsigned long mask)
++{
++ unsigned cr4;
++ mmu_cr4_features |= mask;
++ cr4 = read_cr4();
++ cr4 |= mask;
++ write_cr4(cr4);
++}
++
++static inline void clear_in_cr4(unsigned long mask)
++{
++ unsigned cr4;
++ mmu_cr4_features &= ~mask;
++ cr4 = read_cr4();
++ cr4 &= ~mask;
++ write_cr4(cr4);
++}
++
++struct microcode_header {
++ unsigned int hdrver;
++ unsigned int rev;
++ unsigned int date;
++ unsigned int sig;
++ unsigned int cksum;
++ unsigned int ldrver;
++ unsigned int pf;
++ unsigned int datasize;
++ unsigned int totalsize;
++ unsigned int reserved[3];
++};
++
++struct microcode {
++ struct microcode_header hdr;
++ unsigned int bits[0];
++};
++
++typedef struct microcode microcode_t;
++typedef struct microcode_header microcode_header_t;
++
++/* microcode format is extended from prescott processors */
++struct extended_signature {
++ unsigned int sig;
++ unsigned int pf;
++ unsigned int cksum;
++};
++
++struct extended_sigtable {
++ unsigned int count;
++ unsigned int cksum;
++ unsigned int reserved[3];
++ struct extended_signature sigs[0];
++};
++
++typedef struct {
++ unsigned long seg;
++} mm_segment_t;
++
++
++/*
++ * create a kernel thread without removing it from tasklists
++ */
++extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
++
++/* Free all resources held by a thread. */
++extern void release_thread(struct task_struct *);
++
++/* Prepare to copy thread state - unlazy all lazy status */
++extern void prepare_to_copy(struct task_struct *tsk);
++
++unsigned long get_wchan(struct task_struct *p);
++
++/*
++ * Generic CPUID function
++ * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
++ * resulting in stale register contents being returned.
++ */
++static inline void cpuid(unsigned int op,
++ unsigned int *eax, unsigned int *ebx,
++ unsigned int *ecx, unsigned int *edx)
++{
++ *eax = op;
++ *ecx = 0;
++ __cpuid(eax, ebx, ecx, edx);
++}
++
++/* Some CPUID calls want 'count' to be placed in ecx */
++static inline void cpuid_count(unsigned int op, int count,
++ unsigned int *eax, unsigned int *ebx,
++ unsigned int *ecx, unsigned int *edx)
++{
++ *eax = op;
++ *ecx = count;
++ __cpuid(eax, ebx, ecx, edx);
++}
++
++/*
++ * CPUID functions returning a single datum
++ */
++static inline unsigned int cpuid_eax(unsigned int op)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ cpuid(op, &eax, &ebx, &ecx, &edx);
++ return eax;
++}
++static inline unsigned int cpuid_ebx(unsigned int op)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ cpuid(op, &eax, &ebx, &ecx, &edx);
++ return ebx;
++}
++static inline unsigned int cpuid_ecx(unsigned int op)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ cpuid(op, &eax, &ebx, &ecx, &edx);
++ return ecx;
++}
++static inline unsigned int cpuid_edx(unsigned int op)
++{
++ unsigned int eax, ebx, ecx, edx;
++
++ cpuid(op, &eax, &ebx, &ecx, &edx);
++ return edx;
++}
++
++/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
++static inline void rep_nop(void)
++{
++ __asm__ __volatile__("rep;nop": : :"memory");
++}
++
++/* Stop speculative execution */
++static inline void sync_core(void)
++{
++ int tmp;
++ asm volatile("cpuid" : "=a" (tmp) : "0" (1)
++ : "ebx", "ecx", "edx", "memory");
++}
++
++#define cpu_relax() rep_nop()
++
++static inline void __monitor(const void *eax, unsigned long ecx,
++ unsigned long edx)
++{
++ /* "monitor %eax,%ecx,%edx;" */
++ asm volatile(
++ ".byte 0x0f,0x01,0xc8;"
++ : :"a" (eax), "c" (ecx), "d"(edx));
++}
++
++static inline void __mwait(unsigned long eax, unsigned long ecx)
++{
++ /* "mwait %eax,%ecx;" */
++ asm volatile(
++ ".byte 0x0f,0x01,0xc9;"
++ : :"a" (eax), "c" (ecx));
++}
++
++static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
++{
++ /* "mwait %eax,%ecx;" */
++ asm volatile(
++ "sti; .byte 0x0f,0x01,0xc9;"
++ : :"a" (eax), "c" (ecx));
++}
++
++extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
++
++extern int force_mwait;
++
++extern void select_idle_routine(const struct cpuinfo_x86 *c);
++
++extern unsigned long boot_option_idle_override;
++
++extern void enable_sep_cpu(void);
++extern int sysenter_setup(void);
++
++/* Defined in head.S */
++extern struct desc_ptr early_gdt_descr;
++
++extern void cpu_set_gdt(int);
++extern void switch_to_new_gdt(void);
++extern void cpu_init(void);
++extern void init_gdt(int cpu);
++
++/* from system description table in BIOS. Mostly for MCA use, but
++ * others may find it useful. */
++extern unsigned int machine_id;
++extern unsigned int machine_submodel_id;
++extern unsigned int BIOS_revision;
++
++/* Boot loader type from the setup header */
++extern int bootloader_type;
++
++extern char ignore_fpu_irq;
++#define cache_line_size() (boot_cpu_data.x86_cache_alignment)
++
++#define HAVE_ARCH_PICK_MMAP_LAYOUT 1
++#define ARCH_HAS_PREFETCHW
++#define ARCH_HAS_SPINLOCK_PREFETCH
++
++#ifdef CONFIG_X86_32
++#define BASE_PREFETCH ASM_NOP4
++#define ARCH_HAS_PREFETCH
++#else
++#define BASE_PREFETCH "prefetcht0 (%1)"
++#endif
++
++/* Prefetch instructions for Pentium III and AMD Athlon */
++/* It's not worth to care about 3dnow! prefetches for the K6
++ because they are microcoded there and very slow.
++ However we don't do prefetches for pre XP Athlons currently
++ That should be fixed. */
++static inline void prefetch(const void *x)
++{
++ alternative_input(BASE_PREFETCH,
++ "prefetchnta (%1)",
++ X86_FEATURE_XMM,
++ "r" (x));
++}
++
++/* 3dnow! prefetch to get an exclusive cache line. Useful for
++ spinlocks to avoid one state transition in the cache coherency protocol. */
++static inline void prefetchw(const void *x)
++{
++ alternative_input(BASE_PREFETCH,
++ "prefetchw (%1)",
++ X86_FEATURE_3DNOW,
++ "r" (x));
++}
++
++#define spin_lock_prefetch(x) prefetchw(x)
+ #ifdef CONFIG_X86_32
+-# include "processor_32.h"
++/*
++ * User space process size: 3GB (default).
++ */
++#define TASK_SIZE (PAGE_OFFSET)
++#define STACK_TOP TASK_SIZE
++#define STACK_TOP_MAX STACK_TOP
++
++#define INIT_THREAD { \
++ .sp0 = sizeof(init_stack) + (long)&init_stack, \
++ .vm86_info = NULL, \
++ .sysenter_cs = __KERNEL_CS, \
++ .io_bitmap_ptr = NULL, \
++ .fs = __KERNEL_PERCPU, \
++}
++
++/*
++ * Note that the .io_bitmap member must be extra-big. This is because
++ * the CPU will access an additional byte beyond the end of the IO
++ * permission bitmap. The extra byte must be all 1 bits, and must
++ * be within the limit.
++ */
++#define INIT_TSS { \
++ .x86_tss = { \
++ .sp0 = sizeof(init_stack) + (long)&init_stack, \
++ .ss0 = __KERNEL_DS, \
++ .ss1 = __KERNEL_CS, \
++ .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
++ }, \
++ .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \
++}
++
++#define start_thread(regs, new_eip, new_esp) do { \
++ __asm__("movl %0,%%gs": :"r" (0)); \
++ regs->fs = 0; \
++ set_fs(USER_DS); \
++ regs->ds = __USER_DS; \
++ regs->es = __USER_DS; \
++ regs->ss = __USER_DS; \
++ regs->cs = __USER_CS; \
++ regs->ip = new_eip; \
++ regs->sp = new_esp; \
++} while (0)
++
++
++extern unsigned long thread_saved_pc(struct task_struct *tsk);
++
++#define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long))
++#define KSTK_TOP(info) \
++({ \
++ unsigned long *__ptr = (unsigned long *)(info); \
++ (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \
++})
++
++/*
++ * The below -8 is to reserve 8 bytes on top of the ring0 stack.
++ * This is necessary to guarantee that the entire "struct pt_regs"
++ * is accessable even if the CPU haven't stored the SS/ESP registers
++ * on the stack (interrupt gate does not save these registers
++ * when switching to the same priv ring).
++ * Therefore beware: accessing the ss/esp fields of the
++ * "struct pt_regs" is possible, but they may contain the
++ * completely wrong values.
++ */
++#define task_pt_regs(task) \
++({ \
++ struct pt_regs *__regs__; \
++ __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
++ __regs__ - 1; \
++})
++
++#define KSTK_ESP(task) (task_pt_regs(task)->sp)
++
+ #else
+-# include "processor_64.h"
++/*
++ * User space process size. 47bits minus one guard page.
++ */
++#define TASK_SIZE64 (0x800000000000UL - 4096)
++
++/* This decides where the kernel will search for a free chunk of vm
++ * space during mmap's.
++ */
++#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
++ 0xc0000000 : 0xFFFFe000)
++
++#define TASK_SIZE (test_thread_flag(TIF_IA32) ? \
++ IA32_PAGE_OFFSET : TASK_SIZE64)
++#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \
++ IA32_PAGE_OFFSET : TASK_SIZE64)
++
++#define STACK_TOP TASK_SIZE
++#define STACK_TOP_MAX TASK_SIZE64
++
++#define INIT_THREAD { \
++ .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
++}
++
++#define INIT_TSS { \
++ .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
++}
++
++#define start_thread(regs, new_rip, new_rsp) do { \
++ asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \
++ load_gs_index(0); \
++ (regs)->ip = (new_rip); \
++ (regs)->sp = (new_rsp); \
++ write_pda(oldrsp, (new_rsp)); \
++ (regs)->cs = __USER_CS; \
++ (regs)->ss = __USER_DS; \
++ (regs)->flags = 0x200; \
++ set_fs(USER_DS); \
++} while (0)
++
++/*
++ * Return saved PC of a blocked thread.
++ * What is this good for? it will be always the scheduler or ret_from_fork.
++ */
++#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
++
++#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
++#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
++#endif /* CONFIG_X86_64 */
++
++/* This decides where the kernel will search for a free chunk of vm
++ * space during mmap's.
++ */
++#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
++
++#define KSTK_EIP(task) (task_pt_regs(task)->ip)
++
+ #endif
+--- a/include/asm-x86/mach-xen/asm/segment_32.h
++++ /dev/null
+@@ -1,150 +0,0 @@
+-#ifndef _ASM_SEGMENT_H
+-#define _ASM_SEGMENT_H
+-
+-/*
+- * The layout of the per-CPU GDT under Linux:
+- *
+- * 0 - null
+- * 1 - reserved
+- * 2 - reserved
+- * 3 - reserved
+- *
+- * 4 - unused <==== new cacheline
+- * 5 - unused
+- *
+- * ------- start of TLS (Thread-Local Storage) segments:
+- *
+- * 6 - TLS segment #1 [ glibc's TLS segment ]
+- * 7 - TLS segment #2 [ Wine's %fs Win32 segment ]
+- * 8 - TLS segment #3
+- * 9 - reserved
+- * 10 - reserved
+- * 11 - reserved
+- *
+- * ------- start of kernel segments:
+- *
+- * 12 - kernel code segment <==== new cacheline
+- * 13 - kernel data segment
+- * 14 - default user CS
+- * 15 - default user DS
+- * 16 - TSS
+- * 17 - LDT
+- * 18 - PNPBIOS support (16->32 gate)
+- * 19 - PNPBIOS support
+- * 20 - PNPBIOS support
+- * 21 - PNPBIOS support
+- * 22 - PNPBIOS support
+- * 23 - APM BIOS support
+- * 24 - APM BIOS support
+- * 25 - APM BIOS support
+- *
+- * 26 - ESPFIX small SS
+- * 27 - per-cpu [ offset to per-cpu data area ]
+- * 28 - unused
+- * 29 - unused
+- * 30 - unused
+- * 31 - TSS for double fault handler
+- */
+-#define GDT_ENTRY_TLS_ENTRIES 3
+-#define GDT_ENTRY_TLS_MIN 6
+-#define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
+-
+-#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
+-
+-#define GDT_ENTRY_DEFAULT_USER_CS 14
+-#define __USER_CS (GDT_ENTRY_DEFAULT_USER_CS * 8 + 3)
+-
+-#define GDT_ENTRY_DEFAULT_USER_DS 15
+-#define __USER_DS (GDT_ENTRY_DEFAULT_USER_DS * 8 + 3)
+-
+-#define GDT_ENTRY_KERNEL_BASE 12
+-
+-#define GDT_ENTRY_KERNEL_CS (GDT_ENTRY_KERNEL_BASE + 0)
+-#define __KERNEL_CS (GDT_ENTRY_KERNEL_CS * 8)
+-
+-#define GDT_ENTRY_KERNEL_DS (GDT_ENTRY_KERNEL_BASE + 1)
+-#define __KERNEL_DS (GDT_ENTRY_KERNEL_DS * 8)
+-
+-#define GDT_ENTRY_TSS (GDT_ENTRY_KERNEL_BASE + 4)
+-#define GDT_ENTRY_LDT (GDT_ENTRY_KERNEL_BASE + 5)
+-
+-#define GDT_ENTRY_PNPBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 6)
+-#define GDT_ENTRY_APMBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 11)
+-
+-#define GDT_ENTRY_ESPFIX_SS (GDT_ENTRY_KERNEL_BASE + 14)
+-#define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8)
+-
+-#define GDT_ENTRY_PERCPU (GDT_ENTRY_KERNEL_BASE + 15)
+-#ifdef CONFIG_SMP
+-#define __KERNEL_PERCPU (GDT_ENTRY_PERCPU * 8)
+-#else
+-#define __KERNEL_PERCPU 0
+-#endif
+-
+-#define GDT_ENTRY_DOUBLEFAULT_TSS 31
+-
+-/*
+- * The GDT has 32 entries
+- */
+-#define GDT_ENTRIES 32
+-#define GDT_SIZE (GDT_ENTRIES * 8)
+-
+-/* Simple and small GDT entries for booting only */
+-
+-#define GDT_ENTRY_BOOT_CS 2
+-#define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
+-
+-#define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1)
+-#define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
+-
+-/* The PnP BIOS entries in the GDT */
+-#define GDT_ENTRY_PNPBIOS_CS32 (GDT_ENTRY_PNPBIOS_BASE + 0)
+-#define GDT_ENTRY_PNPBIOS_CS16 (GDT_ENTRY_PNPBIOS_BASE + 1)
+-#define GDT_ENTRY_PNPBIOS_DS (GDT_ENTRY_PNPBIOS_BASE + 2)
+-#define GDT_ENTRY_PNPBIOS_TS1 (GDT_ENTRY_PNPBIOS_BASE + 3)
+-#define GDT_ENTRY_PNPBIOS_TS2 (GDT_ENTRY_PNPBIOS_BASE + 4)
+-
+-/* The PnP BIOS selectors */
+-#define PNP_CS32 (GDT_ENTRY_PNPBIOS_CS32 * 8) /* segment for calling fn */
+-#define PNP_CS16 (GDT_ENTRY_PNPBIOS_CS16 * 8) /* code segment for BIOS */
+-#define PNP_DS (GDT_ENTRY_PNPBIOS_DS * 8) /* data segment for BIOS */
+-#define PNP_TS1 (GDT_ENTRY_PNPBIOS_TS1 * 8) /* transfer data segment */
+-#define PNP_TS2 (GDT_ENTRY_PNPBIOS_TS2 * 8) /* another data segment */
+-
+-/*
+- * The interrupt descriptor table has room for 256 idt's,
+- * the global descriptor table is dependent on the number
+- * of tasks we can have..
+- */
+-#define IDT_ENTRIES 256
+-
+-/* Bottom two bits of selector give the ring privilege level */
+-#define SEGMENT_RPL_MASK 0x3
+-/* Bit 2 is table indicator (LDT/GDT) */
+-#define SEGMENT_TI_MASK 0x4
+-
+-/* User mode is privilege level 3 */
+-#define USER_RPL 0x3
+-/* LDT segment has TI set, GDT has it cleared */
+-#define SEGMENT_LDT 0x4
+-#define SEGMENT_GDT 0x0
+-
+-#define get_kernel_rpl() (xen_feature(XENFEAT_supervisor_mode_kernel)?0:1)
+-
+-/*
+- * Matching rules for certain types of segments.
+- */
+-
+-/* Matches only __KERNEL_CS, ignoring PnP / USER / APM segments */
+-#define SEGMENT_IS_KERNEL_CODE(x) (((x) & ~3) == GDT_ENTRY_KERNEL_CS * 8 \
+- || ((x) & ~3) == (FLAT_KERNEL_CS & ~3))
+-
+-/* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */
+-#define SEGMENT_IS_FLAT_CODE(x) (((x) & ~0x13) == GDT_ENTRY_KERNEL_CS * 8 \
+- || ((x) & ~3) == (FLAT_KERNEL_CS & ~3) \
+- || ((x) & ~3) == (FLAT_USER_CS & ~3))
+-
+-/* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
+-#define SEGMENT_IS_PNP_CODE(x) (((x) & ~0x0b) == GDT_ENTRY_PNPBIOS_BASE * 8)
+-
+-#endif
+--- a/include/asm-x86/mach-xen/asm/segment.h
++++ b/include/asm-x86/mach-xen/asm/segment.h
+@@ -1,5 +1,204 @@
++#ifndef _ASM_X86_SEGMENT_H_
++#define _ASM_X86_SEGMENT_H_
++
++/* Simple and small GDT entries for booting only */
++
++#define GDT_ENTRY_BOOT_CS 2
++#define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
++
++#define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1)
++#define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
++
++#define GDT_ENTRY_BOOT_TSS (GDT_ENTRY_BOOT_CS + 2)
++#define __BOOT_TSS (GDT_ENTRY_BOOT_TSS * 8)
++
+ #ifdef CONFIG_X86_32
+-# include "segment_32.h"
++/*
++ * The layout of the per-CPU GDT under Linux:
++ *
++ * 0 - null
++ * 1 - reserved
++ * 2 - reserved
++ * 3 - reserved
++ *
++ * 4 - unused <==== new cacheline
++ * 5 - unused
++ *
++ * ------- start of TLS (Thread-Local Storage) segments:
++ *
++ * 6 - TLS segment #1 [ glibc's TLS segment ]
++ * 7 - TLS segment #2 [ Wine's %fs Win32 segment ]
++ * 8 - TLS segment #3
++ * 9 - reserved
++ * 10 - reserved
++ * 11 - reserved
++ *
++ * ------- start of kernel segments:
++ *
++ * 12 - kernel code segment <==== new cacheline
++ * 13 - kernel data segment
++ * 14 - default user CS
++ * 15 - default user DS
++ * 16 - TSS
++ * 17 - LDT
++ * 18 - PNPBIOS support (16->32 gate)
++ * 19 - PNPBIOS support
++ * 20 - PNPBIOS support
++ * 21 - PNPBIOS support
++ * 22 - PNPBIOS support
++ * 23 - APM BIOS support
++ * 24 - APM BIOS support
++ * 25 - APM BIOS support
++ *
++ * 26 - ESPFIX small SS
++ * 27 - per-cpu [ offset to per-cpu data area ]
++ * 28 - unused
++ * 29 - unused
++ * 30 - unused
++ * 31 - TSS for double fault handler
++ */
++#define GDT_ENTRY_TLS_MIN 6
++#define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
++
++#define GDT_ENTRY_DEFAULT_USER_CS 14
++#define __USER_CS (GDT_ENTRY_DEFAULT_USER_CS * 8 + 3)
++
++#define GDT_ENTRY_DEFAULT_USER_DS 15
++#define __USER_DS (GDT_ENTRY_DEFAULT_USER_DS * 8 + 3)
++
++#define GDT_ENTRY_KERNEL_BASE 12
++
++#define GDT_ENTRY_KERNEL_CS (GDT_ENTRY_KERNEL_BASE + 0)
++#define __KERNEL_CS (GDT_ENTRY_KERNEL_CS * 8)
++
++#define GDT_ENTRY_KERNEL_DS (GDT_ENTRY_KERNEL_BASE + 1)
++#define __KERNEL_DS (GDT_ENTRY_KERNEL_DS * 8)
++
++#define GDT_ENTRY_TSS (GDT_ENTRY_KERNEL_BASE + 4)
++#define GDT_ENTRY_LDT (GDT_ENTRY_KERNEL_BASE + 5)
++
++#define GDT_ENTRY_PNPBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 6)
++#define GDT_ENTRY_APMBIOS_BASE (GDT_ENTRY_KERNEL_BASE + 11)
++
++#define GDT_ENTRY_ESPFIX_SS (GDT_ENTRY_KERNEL_BASE + 14)
++#define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8)
++
++#define GDT_ENTRY_PERCPU (GDT_ENTRY_KERNEL_BASE + 15)
++#ifdef CONFIG_SMP
++#define __KERNEL_PERCPU (GDT_ENTRY_PERCPU * 8)
+ #else
+-# include "../../segment_64.h"
++#define __KERNEL_PERCPU 0
++#endif
++
++#define GDT_ENTRY_DOUBLEFAULT_TSS 31
++
++/*
++ * The GDT has 32 entries
++ */
++#define GDT_ENTRIES 32
++
++/* The PnP BIOS entries in the GDT */
++#define GDT_ENTRY_PNPBIOS_CS32 (GDT_ENTRY_PNPBIOS_BASE + 0)
++#define GDT_ENTRY_PNPBIOS_CS16 (GDT_ENTRY_PNPBIOS_BASE + 1)
++#define GDT_ENTRY_PNPBIOS_DS (GDT_ENTRY_PNPBIOS_BASE + 2)
++#define GDT_ENTRY_PNPBIOS_TS1 (GDT_ENTRY_PNPBIOS_BASE + 3)
++#define GDT_ENTRY_PNPBIOS_TS2 (GDT_ENTRY_PNPBIOS_BASE + 4)
++
++/* The PnP BIOS selectors */
++#define PNP_CS32 (GDT_ENTRY_PNPBIOS_CS32 * 8) /* segment for calling fn */
++#define PNP_CS16 (GDT_ENTRY_PNPBIOS_CS16 * 8) /* code segment for BIOS */
++#define PNP_DS (GDT_ENTRY_PNPBIOS_DS * 8) /* data segment for BIOS */
++#define PNP_TS1 (GDT_ENTRY_PNPBIOS_TS1 * 8) /* transfer data segment */
++#define PNP_TS2 (GDT_ENTRY_PNPBIOS_TS2 * 8) /* another data segment */
++
++/* Bottom two bits of selector give the ring privilege level */
++#define SEGMENT_RPL_MASK 0x3
++/* Bit 2 is table indicator (LDT/GDT) */
++#define SEGMENT_TI_MASK 0x4
++
++/* User mode is privilege level 3 */
++#define USER_RPL 0x3
++/* LDT segment has TI set, GDT has it cleared */
++#define SEGMENT_LDT 0x4
++#define SEGMENT_GDT 0x0
++
++/*
++ * Matching rules for certain types of segments.
++ */
++
++/* Matches only __KERNEL_CS, ignoring PnP / USER / APM segments */
++#define SEGMENT_IS_KERNEL_CODE(x) (((x) & ~3) == GDT_ENTRY_KERNEL_CS * 8 \
++ || ((x) & ~3) == (FLAT_KERNEL_CS & ~3))
++
++/* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */
++#define SEGMENT_IS_FLAT_CODE(x) (((x) & ~0x13) == GDT_ENTRY_KERNEL_CS * 8 \
++ || ((x) & ~3) == (FLAT_KERNEL_CS & ~3) \
++ || ((x) & ~3) == (FLAT_USER_CS & ~3))
++
++/* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
++#define SEGMENT_IS_PNP_CODE(x) (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8)
++
++#define get_kernel_rpl() (xen_feature(XENFEAT_supervisor_mode_kernel)?0:1)
++
++#else
++#include <asm/cache.h>
++
++#define __KERNEL_CS 0x10
++#define __KERNEL_DS 0x18
++
++#define __KERNEL32_CS 0x08
++
++/*
++ * we cannot use the same code segment descriptor for user and kernel
++ * -- not even in the long flat mode, because of different DPL /kkeil
++ * The segment offset needs to contain a RPL. Grr. -AK
++ * GDT layout to get 64bit syscall right (sysret hardcodes gdt offsets)
++ */
++
++#define __USER32_CS 0x23 /* 4*8+3 */
++#define __USER_DS 0x2b /* 5*8+3 */
++#define __USER_CS 0x33 /* 6*8+3 */
++#define __USER32_DS __USER_DS
++
++#define GDT_ENTRY_TSS 8 /* needs two entries */
++#define GDT_ENTRY_LDT 10 /* needs two entries */
++#define GDT_ENTRY_TLS_MIN 12
++#define GDT_ENTRY_TLS_MAX 14
++
++#define GDT_ENTRY_PER_CPU 15 /* Abused to load per CPU data from limit */
++#define __PER_CPU_SEG (GDT_ENTRY_PER_CPU * 8 + 3)
++
++/* TLS indexes for 64bit - hardcoded in arch_prctl */
++#define FS_TLS 0
++#define GS_TLS 1
++
++#define GS_TLS_SEL ((GDT_ENTRY_TLS_MIN+GS_TLS)*8 + 3)
++#define FS_TLS_SEL ((GDT_ENTRY_TLS_MIN+FS_TLS)*8 + 3)
++
++#define GDT_ENTRIES 16
++
++#endif
++
++/* User mode is privilege level 3 */
++#define USER_RPL 0x3
++/* LDT segment has TI set, GDT has it cleared */
++#define SEGMENT_LDT 0x4
++#define SEGMENT_GDT 0x0
++
++/* Bottom two bits of selector give the ring privilege level */
++#define SEGMENT_RPL_MASK 0x3
++/* Bit 2 is table indicator (LDT/GDT) */
++#define SEGMENT_TI_MASK 0x4
++
++#define IDT_ENTRIES 256
++#define GDT_SIZE (GDT_ENTRIES * 8)
++#define GDT_ENTRY_TLS_ENTRIES 3
++#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
++
++#ifdef __KERNEL__
++#ifndef __ASSEMBLY__
++extern const char early_idt_handlers[IDT_ENTRIES][10];
++#endif
++#endif
++
+ #endif
+--- a/include/asm-x86/mach-xen/asm/smp_32.h
++++ b/include/asm-x86/mach-xen/asm/smp_32.h
+@@ -1,56 +1,51 @@
+ #ifndef __ASM_SMP_H
+ #define __ASM_SMP_H
+
++#ifndef __ASSEMBLY__
++#include <linux/cpumask.h>
++#include <linux/init.h>
++
+ /*
+ * We need the APIC definitions automatically as part of 'smp.h'
+ */
+-#ifndef __ASSEMBLY__
+-#include <linux/kernel.h>
+-#include <linux/threads.h>
+-#include <linux/cpumask.h>
++#ifdef CONFIG_X86_LOCAL_APIC
++# include <asm/mpspec.h>
++# include <asm/apic.h>
++# ifdef CONFIG_X86_IO_APIC
++# include <asm/io_apic.h>
++# endif
+ #endif
+
+-#if defined(CONFIG_X86_LOCAL_APIC) && !defined(__ASSEMBLY__)
+-#include <linux/bitops.h>
+-#include <asm/mpspec.h>
+-#include <asm/apic.h>
+-#ifdef CONFIG_X86_IO_APIC
+-#include <asm/io_apic.h>
+-#endif
+-#endif
++#define cpu_callout_map cpu_possible_map
++#define cpu_callin_map cpu_possible_map
+
+-#define BAD_APICID 0xFFu
+-#ifdef CONFIG_SMP
+-#ifndef __ASSEMBLY__
++extern int smp_num_siblings;
++extern unsigned int num_processors;
+
+-/*
+- * Private routines/data
+- */
+-
+ extern void smp_alloc_memory(void);
+-extern int pic_mode;
+-extern int smp_num_siblings;
+-DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
+-DECLARE_PER_CPU(cpumask_t, cpu_core_map);
++extern void lock_ipi_call_lock(void);
++extern void unlock_ipi_call_lock(void);
+
+ extern void (*mtrr_hook) (void);
+ extern void zap_low_mappings (void);
+-extern void lock_ipi_call_lock(void);
+-extern void unlock_ipi_call_lock(void);
+
+-#define MAX_APICID 256
+-extern u8 __initdata x86_cpu_to_apicid_init[];
+-extern void *x86_cpu_to_apicid_ptr;
++DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
++DECLARE_PER_CPU(cpumask_t, cpu_core_map);
++DECLARE_PER_CPU(u8, cpu_llc_id);
+ DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
+
+-#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
+-
+ #ifdef CONFIG_HOTPLUG_CPU
+ extern void cpu_exit_clear(void);
+ extern void cpu_uninit(void);
+ #endif
+
++#ifdef CONFIG_SMP
++
+ #ifndef CONFIG_XEN
++
++/* Globals due to paravirt */
++extern void set_cpu_sibling_map(int cpu);
++
+ struct smp_ops
+ {
+ void (*smp_prepare_boot_cpu)(void);
+@@ -104,11 +99,11 @@ void native_smp_prepare_cpus(unsigned in
+ int native_cpu_up(unsigned int cpunum);
+ void native_smp_cpus_done(unsigned int max_cpus);
+
+-#define startup_ipi_hook(phys_apicid, start_eip, start_esp) \
+-do { } while (0)
+-
+-#else
++#ifndef CONFIG_PARAVIRT
++#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
++#endif
+
++#else /* CONFIG_XEN */
+
+ void xen_smp_send_stop(void);
+ void xen_smp_send_reschedule(int cpu);
+@@ -120,7 +115,12 @@ int xen_smp_call_function_mask(cpumask_t
+ #define smp_send_reschedule xen_smp_send_reschedule
+ #define smp_call_function_mask xen_smp_call_function_mask
+
+-#endif
++extern void prefill_possible_map(void);
++
++#endif /* CONFIG_XEN */
++
++extern int __cpu_disable(void);
++extern void __cpu_die(unsigned int cpu);
+
+ /*
+ * This function is needed by all SMP systems. It must _always_ be valid
+@@ -130,64 +130,49 @@ int xen_smp_call_function_mask(cpumask_t
+ DECLARE_PER_CPU(int, cpu_number);
+ #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
+
+-extern cpumask_t cpu_possible_map;
+-#define cpu_callin_map cpu_possible_map
++#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
++
++#define safe_smp_processor_id() smp_processor_id()
+
+ /* We don't mark CPUs online until __cpu_up(), so we need another measure */
+ static inline int num_booting_cpus(void)
+ {
+- return cpus_weight(cpu_possible_map);
++ return cpus_weight(cpu_callout_map);
+ }
+
+-#define safe_smp_processor_id() smp_processor_id()
+-extern int __cpu_disable(void);
+-extern void __cpu_die(unsigned int cpu);
+-extern void prefill_possible_map(void);
+-extern unsigned int num_processors;
+-
+-#endif /* !__ASSEMBLY__ */
+-
+ #else /* CONFIG_SMP */
+
+ #define safe_smp_processor_id() 0
+ #define cpu_physical_id(cpu) boot_cpu_physical_apicid
+
+-#define NO_PROC_ID 0xFF /* No processor magic marker */
+-
+-#endif /* CONFIG_SMP */
+-
+-#ifndef __ASSEMBLY__
++#endif /* !CONFIG_SMP */
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+
+-#ifdef APIC_DEFINITION
++static __inline int logical_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
++}
++
++# ifdef APIC_DEFINITION
+ extern int hard_smp_processor_id(void);
+-#else
+-#include <mach_apicdef.h>
++# else
++# include <mach_apicdef.h>
+ static inline int hard_smp_processor_id(void)
+ {
+ /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
++ return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
+ }
+-#endif /* APIC_DEFINITION */
++# endif /* APIC_DEFINITION */
+
+ #else /* CONFIG_X86_LOCAL_APIC */
+
+-#ifndef CONFIG_SMP
+-#define hard_smp_processor_id() 0
+-#endif
++# ifndef CONFIG_SMP
++# define hard_smp_processor_id() 0
++# endif
+
+ #endif /* CONFIG_X86_LOCAL_APIC */
+
+-extern u8 apicid_2_node[];
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+-static __inline int logical_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
+-}
+-#endif
+-#endif
+-
++#endif /* !ASSEMBLY */
+ #endif
+--- a/include/asm-x86/mach-xen/asm/smp_64.h
++++ b/include/asm-x86/mach-xen/asm/smp_64.h
+@@ -1,139 +1,103 @@
+ #ifndef __ASM_SMP_H
+ #define __ASM_SMP_H
+
+-/*
+- * We need the APIC definitions automatically as part of 'smp.h'
+- */
+-#include <linux/threads.h>
+ #include <linux/cpumask.h>
+-#include <linux/bitops.h>
+ #include <linux/init.h>
+-extern int disable_apic;
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+-#include <asm/mpspec.h>
++/*
++ * We need the APIC definitions automatically as part of 'smp.h'
++ */
+ #include <asm/apic.h>
+ #ifdef CONFIG_X86_IO_APIC
+ #include <asm/io_apic.h>
+ #endif
+-#include <asm/thread_info.h>
++#include <asm/mpspec.h>
+ #endif
+-
+-#ifdef CONFIG_SMP
+-
+ #include <asm/pda.h>
++#include <asm/thread_info.h>
+
+-struct pt_regs;
+-
+-extern cpumask_t cpu_present_mask;
+-extern cpumask_t cpu_possible_map;
+-extern cpumask_t cpu_online_map;
+ extern cpumask_t cpu_initialized;
+
+-/*
+- * Private routines/data
+- */
+-
++extern int smp_num_siblings;
++extern unsigned int num_processors;
++
+ extern void smp_alloc_memory(void);
+-extern volatile unsigned long smp_invalidate_needed;
+ extern void lock_ipi_call_lock(void);
+ extern void unlock_ipi_call_lock(void);
+-extern int smp_num_siblings;
+-extern void smp_send_reschedule(int cpu);
++
+ extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
+ void *info, int wait);
+
+-/*
+- * cpu_sibling_map and cpu_core_map now live
+- * in the per cpu area
+- *
+- * extern cpumask_t cpu_sibling_map[NR_CPUS];
+- * extern cpumask_t cpu_core_map[NR_CPUS];
+- */
+ DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
+ DECLARE_PER_CPU(cpumask_t, cpu_core_map);
+-DECLARE_PER_CPU(u8, cpu_llc_id);
+-
+-#define SMP_TRAMPOLINE_BASE 0x6000
++DECLARE_PER_CPU(u16, cpu_llc_id);
++DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
++DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
+
+-/*
+- * On x86 all CPUs are mapped 1:1 to the APIC space.
+- * This simplifies scheduling and IPI sending and
+- * compresses data structures.
+- */
+-
+-static inline int num_booting_cpus(void)
++#ifdef CONFIG_X86_LOCAL_APIC
++static inline int cpu_present_to_apicid(int mps_cpu)
+ {
+- return cpus_weight(cpu_possible_map);
++ if (cpu_present(mps_cpu))
++ return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
++ else
++ return BAD_APICID;
+ }
++#endif
+
+-#define raw_smp_processor_id() read_pda(cpunumber)
++#ifdef CONFIG_SMP
++
++#define SMP_TRAMPOLINE_BASE 0x6000
+
+ extern int __cpu_disable(void);
+ extern void __cpu_die(unsigned int cpu);
+ extern void prefill_possible_map(void);
+-extern unsigned num_processors;
+ extern unsigned __cpuinitdata disabled_cpus;
+
+-#define NO_PROC_ID 0xFF /* No processor magic marker */
+-
+-#endif /* CONFIG_SMP */
++#define raw_smp_processor_id() read_pda(cpunumber)
++#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
+
+-#define safe_smp_processor_id() smp_processor_id()
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+-static inline int hard_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
+-}
+-#endif
++#define stack_smp_processor_id() \
++ ({ \
++ struct thread_info *ti; \
++ __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
++ ti->cpu; \
++})
+
+ /*
+- * Some lowlevel functions might want to know about
+- * the real APIC ID <-> CPU # mapping.
++ * On x86 all CPUs are mapped 1:1 to the APIC space. This simplifies
++ * scheduling and IPI sending and compresses data structures.
+ */
+-extern u8 __initdata x86_cpu_to_apicid_init[];
+-extern void *x86_cpu_to_apicid_ptr;
+-DECLARE_PER_CPU(u8, x86_cpu_to_apicid); /* physical ID */
+-extern u8 bios_cpu_apicid[];
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+-static inline int cpu_present_to_apicid(int mps_cpu)
++static inline int num_booting_cpus(void)
+ {
+- if (mps_cpu < NR_CPUS)
+- return (int)bios_cpu_apicid[mps_cpu];
+- else
+- return BAD_APICID;
++ return cpus_weight(cpu_possible_map);
+ }
+-#endif
+
+-#ifndef CONFIG_SMP
++extern void smp_send_reschedule(int cpu);
++
++#else /* CONFIG_SMP */
++
++extern unsigned int boot_cpu_id;
++#define cpu_physical_id(cpu) boot_cpu_id
+ #define stack_smp_processor_id() 0
+-#define cpu_logical_map(x) (x)
+-#else
+-#include <asm/thread_info.h>
+-#define stack_smp_processor_id() \
+-({ \
+- struct thread_info *ti; \
+- __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
+- ti->cpu; \
+-})
+-#endif
++
++#endif /* !CONFIG_SMP */
++
++#define safe_smp_processor_id() smp_processor_id()
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+ static __inline int logical_smp_processor_id(void)
+ {
+ /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
++ return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
++}
++
++static inline int hard_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
+ }
+ #endif
+
+-#ifdef CONFIG_SMP
+-#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
+-#else
+-extern unsigned int boot_cpu_id;
+-#define cpu_physical_id(cpu) boot_cpu_id
+-#endif /* !CONFIG_SMP */
+ #endif
+
+--- /dev/null
++++ b/include/asm-x86/mach-xen/asm/spinlock.h
+@@ -0,0 +1,333 @@
++#ifndef _X86_SPINLOCK_H_
++#define _X86_SPINLOCK_H_
++
++#include <asm/atomic.h>
++#include <asm/rwlock.h>
++#include <asm/page.h>
++#include <asm/processor.h>
++#include <linux/compiler.h>
++
++/*
++ * Your basic SMP spinlocks, allowing only a single CPU anywhere
++ *
++ * Simple spin lock operations. There are two variants, one clears IRQ's
++ * on the local processor, one does not.
++ *
++ * These are fair FIFO ticket locks, which are currently limited to 256
++ * CPUs.
++ *
++ * (the type definitions are in asm/spinlock_types.h)
++ */
++
++#ifdef CONFIG_X86_32
++# define LOCK_PTR_REG "a"
++# define REG_PTR_MODE "k"
++#else
++# define LOCK_PTR_REG "D"
++# define REG_PTR_MODE "q"
++#endif
++
++#if defined(CONFIG_X86_32) && \
++ (defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE))
++/*
++ * On PPro SMP or if we are using OOSTORE, we use a locked operation to unlock
++ * (PPro errata 66, 92)
++ */
++# define UNLOCK_LOCK_PREFIX LOCK_PREFIX
++#else
++# define UNLOCK_LOCK_PREFIX
++#endif
++
++int xen_spinlock_init(unsigned int cpu);
++void xen_spinlock_cleanup(unsigned int cpu);
++extern int xen_spin_wait(raw_spinlock_t *, unsigned int token);
++extern int xen_spin_wait_flags(raw_spinlock_t *, unsigned int *token,
++ unsigned int flags);
++extern unsigned int xen_spin_adjust(raw_spinlock_t *, unsigned int token);
++extern void xen_spin_kick(raw_spinlock_t *, unsigned int token);
++
++/*
++ * Ticket locks are conceptually two parts, one indicating the current head of
++ * the queue, and the other indicating the current tail. The lock is acquired
++ * by atomically noting the tail and incrementing it by one (thus adding
++ * ourself to the queue and noting our position), then waiting until the head
++ * becomes equal to the the initial value of the tail.
++ *
++ * We use an xadd covering *both* parts of the lock, to increment the tail and
++ * also load the position of the head, which takes care of memory ordering
++ * issues and should be optimal for the uncontended case. Note the tail must be
++ * in the high part, because a wide xadd increment of the low part would carry
++ * up and contaminate the high part.
++ *
++ * With fewer than 2^8 possible CPUs, we can use x86's partial registers to
++ * save some instructions and make the code more elegant. There really isn't
++ * much between them in performance though, especially as locks are out of line.
++ */
++#if (NR_CPUS < 256)
++#define TICKET_SHIFT 8
++#define __raw_spin_lock_preamble \
++ asm(LOCK_PREFIX "xaddw %w0, %2\n\t" \
++ "cmpb %h0, %b0\n\t" \
++ "sete %1" \
++ : "=&Q" (token), "=qm" (free), "+m" (lock->slock) \
++ : "0" (0x0100) \
++ : "memory", "cc")
++#define __raw_spin_lock_body \
++ asm("1:\t" \
++ "cmpb %h0, %b0\n\t" \
++ "je 2f\n\t" \
++ "decl %1\n\t" \
++ "jz 2f\n\t" \
++ "rep ; nop\n\t" \
++ "movb %2, %b0\n\t" \
++ /* don't need lfence here, because loads are in-order */ \
++ "jmp 1b\n" \
++ "2:" \
++ : "+Q" (token), "+g" (count) \
++ : "m" (lock->slock) \
++ : "memory", "cc")
++
++
++static inline int __raw_spin_trylock(raw_spinlock_t *lock)
++{
++ int tmp, new;
++
++ asm("movzwl %2, %0\n\t"
++ "cmpb %h0, %b0\n\t"
++ "leal 0x100(%" REG_PTR_MODE "0), %1\n\t"
++ "jne 1f\n\t"
++ LOCK_PREFIX "cmpxchgw %w1, %2\n\t"
++ "1:\t"
++ "sete %b1\n\t"
++ "movzbl %b1, %0\n\t"
++ : "=&a" (tmp), "=&q" (new), "+m" (lock->slock)
++ :
++ : "memory", "cc");
++
++ return tmp;
++}
++
++static inline void __raw_spin_unlock(raw_spinlock_t *lock)
++{
++ unsigned int token;
++ unsigned char kick;
++
++ asm(UNLOCK_LOCK_PREFIX "incb %2\n\t"
++ "movzwl %2, %0\n\t"
++ "cmpb %h0, %b0\n\t"
++ "setne %1"
++ : "=&Q" (token), "=qm" (kick), "+m" (lock->slock)
++ :
++ : "memory", "cc");
++ if (kick)
++ xen_spin_kick(lock, token);
++}
++#else
++#define TICKET_SHIFT 16
++#define __raw_spin_lock_preamble \
++ do { \
++ unsigned int tmp; \
++ asm(LOCK_PREFIX "xaddl %0, %2\n\t" \
++ "shldl $16, %0, %3\n\t" \
++ "cmpw %w3, %w0\n\t" \
++ "sete %1"
++ : "=&r" (token), "=qm" (free), "+m" (lock->slock), \
++ "=&g" (tmp) \
++ : "0" (0x00010000) \
++ : "memory", "cc"); \
++ } while (0)
++#define __raw_spin_lock_body \
++ do { \
++ unsigned int tmp; \
++ asm("shldl $16, %0, %2\n" \
++ "1:\t" \
++ "cmpw %w2, %w0\n\t" \
++ "je 2f\n\t" \
++ "decl %1\n\t" \
++ "jz 2f\n\t" \
++ "rep ; nop\n\t" \
++ "movw %3, %w0\n\t" \
++ /* don't need lfence here, because loads are in-order */ \
++ "jmp 1b\n" \
++ "2:" \
++ : "+r" (token), "+g" (count), "=&g" (tmp) \
++ : "m" (lock->slock) \
++ : "memory", "cc"); \
++ } while (0)
++
++static inline int __raw_spin_trylock(raw_spinlock_t *lock)
++{
++ int tmp;
++ int new;
++
++ asm("movl %2, %0\n\t"
++ "movl %0, %1\n\t"
++ "roll $16, %0\n\t"
++ "cmpl %0, %1\n\t"
++ "leal 0x00010000(%" REG_PTR_MODE "0), %1\n\t"
++ "jne 1f\n\t"
++ LOCK_PREFIX "cmpxchgl %1, %2\n"
++ "1:\t"
++ "sete %b1\n\t"
++ "movzbl %b1, %0\n\t"
++ : "=&a" (tmp), "=&q" (new), "+m" (lock->slock)
++ :
++ : "memory", "cc");
++
++ return tmp;
++}
++
++static inline void __raw_spin_unlock(raw_spinlock_t *lock)
++{
++ unsigned int token, tmp;
++ bool kick;
++
++ asm(UNLOCK_LOCK_PREFIX "incw %2\n\t"
++ "movl %2, %0\n\t"
++ "shldl $16, %0, %3\n\t"
++ "cmpw %w3, %w0\n\t"
++ "setne %1"
++ : "=&r" (token), "=qm" (kick), "+m" (lock->slock), "=&r" (tmp)
++ :
++ : "memory", "cc");
++ if (kick)
++ xen_spin_kick(lock, token);
++}
++#endif
++
++static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
++{
++ int tmp = *(volatile signed int *)(&(lock)->slock);
++
++ return !!(((tmp >> TICKET_SHIFT) ^ tmp) & ((1 << TICKET_SHIFT) - 1));
++}
++
++static inline int __raw_spin_is_contended(raw_spinlock_t *lock)
++{
++ int tmp = *(volatile signed int *)(&(lock)->slock);
++
++ return (((tmp >> TICKET_SHIFT) - tmp) & ((1 << TICKET_SHIFT) - 1)) > 1;
++}
++
++static inline void __raw_spin_lock(raw_spinlock_t *lock)
++{
++ unsigned int token, count;
++ bool free;
++
++ __raw_spin_lock_preamble;
++ if (unlikely(!free))
++ token = xen_spin_adjust(lock, token);
++ do {
++ count = 1 << 10;
++ __raw_spin_lock_body;
++ } while (unlikely(!count) && !xen_spin_wait(lock, token));
++}
++
++static inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
++ unsigned long flags)
++{
++ unsigned int token, count;
++ bool free;
++
++ __raw_spin_lock_preamble;
++ if (unlikely(!free))
++ token = xen_spin_adjust(lock, token);
++ do {
++ count = 1 << 10;
++ __raw_spin_lock_body;
++ } while (unlikely(!count) && !xen_spin_wait_flags(lock, &token, flags));
++}
++
++static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
++{
++ while (__raw_spin_is_locked(lock))
++ cpu_relax();
++}
++
++/*
++ * Read-write spinlocks, allowing multiple readers
++ * but only one writer.
++ *
++ * NOTE! it is quite common to have readers in interrupts
++ * but no interrupt writers. For those circumstances we
++ * can "mix" irq-safe locks - any writer needs to get a
++ * irq-safe write-lock, but readers can get non-irqsafe
++ * read-locks.
++ *
++ * On x86, we implement read-write locks as a 32-bit counter
++ * with the high bit (sign) being the "contended" bit.
++ */
++
++/**
++ * read_can_lock - would read_trylock() succeed?
++ * @lock: the rwlock in question.
++ */
++static inline int __raw_read_can_lock(raw_rwlock_t *lock)
++{
++ return (int)(lock)->lock > 0;
++}
++
++/**
++ * write_can_lock - would write_trylock() succeed?
++ * @lock: the rwlock in question.
++ */
++static inline int __raw_write_can_lock(raw_rwlock_t *lock)
++{
++ return (lock)->lock == RW_LOCK_BIAS;
++}
++
++static inline void __raw_read_lock(raw_rwlock_t *rw)
++{
++ asm volatile(LOCK_PREFIX " subl $1,(%0)\n\t"
++ "jns 1f\n"
++ "call __read_lock_failed\n\t"
++ "1:\n"
++ ::LOCK_PTR_REG (rw) : "memory");
++}
++
++static inline void __raw_write_lock(raw_rwlock_t *rw)
++{
++ asm volatile(LOCK_PREFIX " subl %1,(%0)\n\t"
++ "jz 1f\n"
++ "call __write_lock_failed\n\t"
++ "1:\n"
++ ::LOCK_PTR_REG (rw), "i" (RW_LOCK_BIAS) : "memory");
++}
++
++static inline int __raw_read_trylock(raw_rwlock_t *lock)
++{
++ atomic_t *count = (atomic_t *)lock;
++
++ atomic_dec(count);
++ if (atomic_read(count) >= 0)
++ return 1;
++ atomic_inc(count);
++ return 0;
++}
++
++static inline int __raw_write_trylock(raw_rwlock_t *lock)
++{
++ atomic_t *count = (atomic_t *)lock;
++
++ if (atomic_sub_and_test(RW_LOCK_BIAS, count))
++ return 1;
++ atomic_add(RW_LOCK_BIAS, count);
++ return 0;
++}
++
++static inline void __raw_read_unlock(raw_rwlock_t *rw)
++{
++ asm volatile(LOCK_PREFIX "incl %0" :"+m" (rw->lock) : : "memory");
++}
++
++static inline void __raw_write_unlock(raw_rwlock_t *rw)
++{
++ asm volatile(LOCK_PREFIX "addl %1, %0"
++ : "+m" (rw->lock) : "i" (RW_LOCK_BIAS) : "memory");
++}
++
++#define _raw_spin_relax(lock) cpu_relax()
++#define _raw_read_relax(lock) cpu_relax()
++#define _raw_write_relax(lock) cpu_relax()
++
++#endif
+--- a/include/asm-x86/mach-xen/asm/system_32.h
++++ /dev/null
+@@ -1,312 +0,0 @@
+-#ifndef __ASM_SYSTEM_H
+-#define __ASM_SYSTEM_H
+-
+-#include <linux/kernel.h>
+-#include <asm/segment.h>
+-#include <asm/cpufeature.h>
+-#include <asm/cmpxchg.h>
+-#include <asm/synch_bitops.h>
+-#include <asm/hypervisor.h>
+-
+-#ifdef __KERNEL__
+-#define AT_VECTOR_SIZE_ARCH 2 /* entries in ARCH_DLINFO */
+-
+-struct task_struct; /* one of the stranger aspects of C forward declarations.. */
+-extern struct task_struct * FASTCALL(__switch_to(struct task_struct *prev, struct task_struct *next));
+-
+-/*
+- * Saving eflags is important. It switches not only IOPL between tasks,
+- * it also protects other tasks from NT leaking through sysenter etc.
+- */
+-#define switch_to(prev,next,last) do { \
+- unsigned long esi,edi; \
+- asm volatile("pushfl\n\t" /* Save flags */ \
+- "pushl %%ebp\n\t" \
+- "movl %%esp,%0\n\t" /* save ESP */ \
+- "movl %5,%%esp\n\t" /* restore ESP */ \
+- "movl $1f,%1\n\t" /* save EIP */ \
+- "pushl %6\n\t" /* restore EIP */ \
+- "jmp __switch_to\n" \
+- "1:\t" \
+- "popl %%ebp\n\t" \
+- "popfl" \
+- :"=m" (prev->thread.esp),"=m" (prev->thread.eip), \
+- "=a" (last),"=S" (esi),"=D" (edi) \
+- :"m" (next->thread.esp),"m" (next->thread.eip), \
+- "2" (prev), "d" (next)); \
+-} while (0)
+-
+-#define _set_base(addr,base) do { unsigned long __pr; \
+-__asm__ __volatile__ ("movw %%dx,%1\n\t" \
+- "rorl $16,%%edx\n\t" \
+- "movb %%dl,%2\n\t" \
+- "movb %%dh,%3" \
+- :"=&d" (__pr) \
+- :"m" (*((addr)+2)), \
+- "m" (*((addr)+4)), \
+- "m" (*((addr)+7)), \
+- "0" (base) \
+- ); } while(0)
+-
+-#define _set_limit(addr,limit) do { unsigned long __lr; \
+-__asm__ __volatile__ ("movw %%dx,%1\n\t" \
+- "rorl $16,%%edx\n\t" \
+- "movb %2,%%dh\n\t" \
+- "andb $0xf0,%%dh\n\t" \
+- "orb %%dh,%%dl\n\t" \
+- "movb %%dl,%2" \
+- :"=&d" (__lr) \
+- :"m" (*(addr)), \
+- "m" (*((addr)+6)), \
+- "0" (limit) \
+- ); } while(0)
+-
+-#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , (base) )
+-#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , ((limit)-1) )
+-
+-/*
+- * Load a segment. Fall back on loading the zero
+- * segment if something goes wrong..
+- */
+-#define loadsegment(seg,value) \
+- asm volatile("\n" \
+- "1:\t" \
+- "mov %0,%%" #seg "\n" \
+- "2:\n" \
+- ".section .fixup,\"ax\"\n" \
+- "3:\t" \
+- "pushl $0\n\t" \
+- "popl %%" #seg "\n\t" \
+- "jmp 2b\n" \
+- ".previous\n" \
+- ".section __ex_table,\"a\"\n\t" \
+- ".align 4\n\t" \
+- ".long 1b,3b\n" \
+- ".previous" \
+- : :"rm" (value))
+-
+-/*
+- * Save a segment register away
+- */
+-#define savesegment(seg, value) \
+- asm volatile("mov %%" #seg ",%0":"=rm" (value))
+-
+-static inline void xen_clts(void)
+-{
+- HYPERVISOR_fpu_taskswitch(0);
+-}
+-
+-static inline unsigned long xen_read_cr0(void)
+-{
+- unsigned long val;
+- asm volatile("movl %%cr0,%0\n\t" :"=r" (val));
+- return val;
+-}
+-
+-static inline void xen_write_cr0(unsigned long val)
+-{
+- asm volatile("movl %0,%%cr0": :"r" (val));
+-}
+-
+-#define xen_read_cr2() (current_vcpu_info()->arch.cr2)
+-
+-static inline void xen_write_cr2(unsigned long val)
+-{
+- asm volatile("movl %0,%%cr2": :"r" (val));
+-}
+-
+-static inline unsigned long xen_read_cr3(void)
+-{
+- unsigned long val;
+- asm volatile("movl %%cr3,%0\n\t" :"=r" (val));
+- return mfn_to_pfn(xen_cr3_to_pfn(val)) << PAGE_SHIFT;
+-}
+-
+-static inline void xen_write_cr3(unsigned long val)
+-{
+- val = xen_pfn_to_cr3(pfn_to_mfn(val >> PAGE_SHIFT));
+- asm volatile("movl %0,%%cr3": :"r" (val));
+-}
+-
+-static inline unsigned long xen_read_cr4(void)
+-{
+- unsigned long val;
+- asm volatile("movl %%cr4,%0\n\t" :"=r" (val));
+- return val;
+-}
+-
+-static inline unsigned long xen_read_cr4_safe(void)
+-{
+- unsigned long val;
+- /* This could fault if %cr4 does not exist */
+- asm volatile("1: movl %%cr4, %0 \n"
+- "2: \n"
+- ".section __ex_table,\"a\" \n"
+- ".long 1b,2b \n"
+- ".previous \n"
+- : "=r" (val): "0" (0));
+- return val;
+-}
+-
+-static inline void xen_write_cr4(unsigned long val)
+-{
+- asm volatile("movl %0,%%cr4": :"r" (val));
+-}
+-
+-static inline void xen_wbinvd(void)
+-{
+- asm volatile("wbinvd": : :"memory");
+-}
+-
+-static inline void clflush(volatile void *__p)
+-{
+- asm volatile("clflush %0" : "+m" (*(char __force *)__p));
+-}
+-
+-#define read_cr0() (xen_read_cr0())
+-#define write_cr0(x) (xen_write_cr0(x))
+-#define read_cr2() (xen_read_cr2())
+-#define write_cr2(x) (xen_write_cr2(x))
+-#define read_cr3() (xen_read_cr3())
+-#define write_cr3(x) (xen_write_cr3(x))
+-#define read_cr4() (xen_read_cr4())
+-#define read_cr4_safe() (xen_read_cr4_safe())
+-#define write_cr4(x) (xen_write_cr4(x))
+-#define wbinvd() (xen_wbinvd())
+-
+-/* Clear the 'TS' bit */
+-#define clts() (xen_clts())
+-
+-/* Set the 'TS' bit */
+-#define stts() (HYPERVISOR_fpu_taskswitch(1))
+-
+-#endif /* __KERNEL__ */
+-
+-static inline unsigned long get_limit(unsigned long segment)
+-{
+- unsigned long __limit;
+- __asm__("lsll %1,%0"
+- :"=r" (__limit):"r" (segment));
+- return __limit+1;
+-}
+-
+-#define nop() __asm__ __volatile__ ("nop")
+-
+-/*
+- * Force strict CPU ordering.
+- * And yes, this is required on UP too when we're talking
+- * to devices.
+- *
+- * For now, "wmb()" doesn't actually do anything, as all
+- * Intel CPU's follow what Intel calls a *Processor Order*,
+- * in which all writes are seen in the program order even
+- * outside the CPU.
+- *
+- * I expect future Intel CPU's to have a weaker ordering,
+- * but I'd also expect them to finally get their act together
+- * and add some real memory barriers if so.
+- *
+- * Some non intel clones support out of order store. wmb() ceases to be a
+- * nop for these.
+- */
+-
+-
+-#define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
+-#define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
+-#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM)
+-
+-/**
+- * read_barrier_depends - Flush all pending reads that subsequents reads
+- * depend on.
+- *
+- * No data-dependent reads from memory-like regions are ever reordered
+- * over this barrier. All reads preceding this primitive are guaranteed
+- * to access memory (but not necessarily other CPUs' caches) before any
+- * reads following this primitive that depend on the data return by
+- * any of the preceding reads. This primitive is much lighter weight than
+- * rmb() on most CPUs, and is never heavier weight than is
+- * rmb().
+- *
+- * These ordering constraints are respected by both the local CPU
+- * and the compiler.
+- *
+- * Ordering is not guaranteed by anything other than these primitives,
+- * not even by data dependencies. See the documentation for
+- * memory_barrier() for examples and URLs to more information.
+- *
+- * For example, the following code would force ordering (the initial
+- * value of "a" is zero, "b" is one, and "p" is "&a"):
+- *
+- * <programlisting>
+- * CPU 0 CPU 1
+- *
+- * b = 2;
+- * memory_barrier();
+- * p = &b; q = p;
+- * read_barrier_depends();
+- * d = *q;
+- * </programlisting>
+- *
+- * because the read of "*q" depends on the read of "p" and these
+- * two reads are separated by a read_barrier_depends(). However,
+- * the following code, with the same initial values for "a" and "b":
+- *
+- * <programlisting>
+- * CPU 0 CPU 1
+- *
+- * a = 2;
+- * memory_barrier();
+- * b = 3; y = b;
+- * read_barrier_depends();
+- * x = a;
+- * </programlisting>
+- *
+- * does not enforce ordering, since there is no data dependency between
+- * the read of "a" and the read of "b". Therefore, on some CPUs, such
+- * as Alpha, "y" could be set to 3 and "x" to 0. Use rmb()
+- * in cases like this where there are no data dependencies.
+- **/
+-
+-#define read_barrier_depends() do { } while(0)
+-
+-#ifdef CONFIG_SMP
+-#define smp_mb() mb()
+-#ifdef CONFIG_X86_PPRO_FENCE
+-# define smp_rmb() rmb()
+-#else
+-# define smp_rmb() barrier()
+-#endif
+-#ifdef CONFIG_X86_OOSTORE
+-# define smp_wmb() wmb()
+-#else
+-# define smp_wmb() barrier()
+-#endif
+-#define smp_read_barrier_depends() read_barrier_depends()
+-#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
+-#else
+-#define smp_mb() barrier()
+-#define smp_rmb() barrier()
+-#define smp_wmb() barrier()
+-#define smp_read_barrier_depends() do { } while(0)
+-#define set_mb(var, value) do { var = value; barrier(); } while (0)
+-#endif
+-
+-#include <linux/irqflags.h>
+-
+-/*
+- * disable hlt during certain critical i/o operations
+- */
+-#define HAVE_DISABLE_HLT
+-void disable_hlt(void);
+-void enable_hlt(void);
+-
+-extern int es7000_plat;
+-void cpu_idle_wait(void);
+-
+-extern unsigned long arch_align_stack(unsigned long sp);
+-extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
+-
+-void default_idle(void);
+-void __show_registers(struct pt_regs *, int all);
+-
+-#endif
+--- a/include/asm-x86/mach-xen/asm/system_64.h
++++ b/include/asm-x86/mach-xen/asm/system_64.h
+@@ -1,122 +1,9 @@
+ #ifndef __ASM_SYSTEM_H
+ #define __ASM_SYSTEM_H
+
+-#include <linux/kernel.h>
+ #include <asm/segment.h>
+ #include <asm/cmpxchg.h>
+
+-#include <asm/synch_bitops.h>
+-#include <asm/hypervisor.h>
+-#include <xen/interface/arch-x86_64.h>
+-
+-#ifdef __KERNEL__
+-
+-/* entries in ARCH_DLINFO: */
+-#ifdef CONFIG_IA32_EMULATION
+-# define AT_VECTOR_SIZE_ARCH 2
+-#else
+-# define AT_VECTOR_SIZE_ARCH 1
+-#endif
+-
+-#define __SAVE(reg,offset) "movq %%" #reg ",(14-" #offset ")*8(%%rsp)\n\t"
+-#define __RESTORE(reg,offset) "movq (14-" #offset ")*8(%%rsp),%%" #reg "\n\t"
+-
+-/* frame pointer must be last for get_wchan */
+-#define SAVE_CONTEXT "pushf ; pushq %%rbp ; movq %%rsi,%%rbp\n\t"
+-#define RESTORE_CONTEXT "movq %%rbp,%%rsi ; popq %%rbp ; popf\n\t"
+-
+-#define __EXTRA_CLOBBER \
+- ,"rcx","rbx","rdx","r8","r9","r10","r11","r12","r13","r14","r15"
+-
+-/* Save restore flags to clear handle leaking NT */
+-#define switch_to(prev,next,last) \
+- asm volatile(SAVE_CONTEXT \
+- "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */ \
+- "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */ \
+- "call __switch_to\n\t" \
+- ".globl thread_return\n" \
+- "thread_return:\n\t" \
+- "movq %%gs:%P[pda_pcurrent],%%rsi\n\t" \
+- "movq %P[thread_info](%%rsi),%%r8\n\t" \
+- LOCK_PREFIX "btr %[tif_fork],%P[ti_flags](%%r8)\n\t" \
+- "movq %%rax,%%rdi\n\t" \
+- "jc ret_from_fork\n\t" \
+- RESTORE_CONTEXT \
+- : "=a" (last) \
+- : [next] "S" (next), [prev] "D" (prev), \
+- [threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \
+- [ti_flags] "i" (offsetof(struct thread_info, flags)),\
+- [tif_fork] "i" (TIF_FORK), \
+- [thread_info] "i" (offsetof(struct task_struct, stack)), \
+- [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \
+- : "memory", "cc" __EXTRA_CLOBBER)
+-
+-extern void load_gs_index(unsigned);
+-
+-/*
+- * Load a segment. Fall back on loading the zero
+- * segment if something goes wrong..
+- */
+-#define loadsegment(seg,value) \
+- asm volatile("\n" \
+- "1:\t" \
+- "movl %k0,%%" #seg "\n" \
+- "2:\n" \
+- ".section .fixup,\"ax\"\n" \
+- "3:\t" \
+- "movl %1,%%" #seg "\n\t" \
+- "jmp 2b\n" \
+- ".previous\n" \
+- ".section __ex_table,\"a\"\n\t" \
+- ".align 8\n\t" \
+- ".quad 1b,3b\n" \
+- ".previous" \
+- : :"r" (value), "r" (0))
+-
+-/*
+- * Clear and set 'TS' bit respectively
+- */
+-#define clts() (HYPERVISOR_fpu_taskswitch(0))
+-
+-static inline unsigned long read_cr0(void)
+-{
+- unsigned long cr0;
+- asm volatile("movq %%cr0,%0" : "=r" (cr0));
+- return cr0;
+-}
+-
+-static inline void write_cr0(unsigned long val)
+-{
+- asm volatile("movq %0,%%cr0" :: "r" (val));
+-}
+-
+-#define read_cr2() current_vcpu_info()->arch.cr2
+-
+-#define write_cr2(val) ((void)(current_vcpu_info()->arch.cr2 = (val)))
+-
+-#define read_cr3() ({ \
+- unsigned long __dummy; \
+- asm volatile("movq %%cr3,%0" : "=r" (__dummy)); \
+- machine_to_phys(__dummy); \
+-})
+-
+-static inline void write_cr3(unsigned long val)
+-{
+- val = phys_to_machine(val);
+- asm volatile("movq %0,%%cr3" :: "r" (val) : "memory");
+-}
+-
+-static inline unsigned long read_cr4(void)
+-{
+- unsigned long cr4;
+- asm volatile("movq %%cr4,%0" : "=r" (cr4));
+- return cr4;
+-}
+-
+-static inline void write_cr4(unsigned long val)
+-{
+- asm volatile("movq %0,%%cr4" :: "r" (val) : "memory");
+-}
+
+ static inline unsigned long read_cr8(void)
+ {
+@@ -128,52 +15,6 @@ static inline void write_cr8(unsigned lo
+ BUG_ON(val);
+ }
+
+-#define stts() (HYPERVISOR_fpu_taskswitch(1))
+-
+-#define wbinvd() \
+- __asm__ __volatile__ ("wbinvd": : :"memory")
+-
+-#endif /* __KERNEL__ */
+-
+-static inline void clflush(volatile void *__p)
+-{
+- asm volatile("clflush %0" : "+m" (*(char __force *)__p));
+-}
+-
+-#define nop() __asm__ __volatile__ ("nop")
+-
+-#ifdef CONFIG_SMP
+-#define smp_mb() mb()
+-#define smp_rmb() barrier()
+-#define smp_wmb() barrier()
+-#define smp_read_barrier_depends() do {} while(0)
+-#else
+-#define smp_mb() barrier()
+-#define smp_rmb() barrier()
+-#define smp_wmb() barrier()
+-#define smp_read_barrier_depends() do {} while(0)
+-#endif
+-
+-
+-/*
+- * Force strict CPU ordering.
+- * And yes, this is required on UP too when we're talking
+- * to devices.
+- */
+-#define mb() asm volatile("mfence":::"memory")
+-#define rmb() asm volatile("lfence":::"memory")
+-#define wmb() asm volatile("sfence" ::: "memory")
+-
+-#define read_barrier_depends() do {} while(0)
+-#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
+-
+-#define warn_if_not_ulong(x) do { unsigned long foo; (void) (&(x) == &foo); } while (0)
+-
+ #include <linux/irqflags.h>
+
+-void cpu_idle_wait(void);
+-
+-extern unsigned long arch_align_stack(unsigned long sp);
+-extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
+-
+ #endif
+--- a/include/asm-x86/mach-xen/asm/system.h
++++ b/include/asm-x86/mach-xen/asm/system.h
+@@ -1,5 +1,393 @@
++#ifndef _ASM_X86_SYSTEM_H_
++#define _ASM_X86_SYSTEM_H_
++
++#include <asm/asm.h>
++#include <asm/segment.h>
++#include <asm/cpufeature.h>
++#include <asm/cmpxchg.h>
++#include <asm/nops.h>
++#include <asm/hypervisor.h>
++
++#include <linux/kernel.h>
++#include <linux/irqflags.h>
++
++/* entries in ARCH_DLINFO: */
++#ifdef CONFIG_IA32_EMULATION
++# define AT_VECTOR_SIZE_ARCH 2
++#else
++# define AT_VECTOR_SIZE_ARCH 1
++#endif
++
++#ifdef CONFIG_X86_32
++
++struct task_struct; /* one of the stranger aspects of C forward declarations */
++struct task_struct *__switch_to(struct task_struct *prev,
++ struct task_struct *next);
++
++/*
++ * Saving eflags is important. It switches not only IOPL between tasks,
++ * it also protects other tasks from NT leaking through sysenter etc.
++ */
++#define switch_to(prev, next, last) do { \
++ unsigned long esi, edi; \
++ asm volatile("pushfl\n\t" /* Save flags */ \
++ "pushl %%ebp\n\t" \
++ "movl %%esp,%0\n\t" /* save ESP */ \
++ "movl %5,%%esp\n\t" /* restore ESP */ \
++ "movl $1f,%1\n\t" /* save EIP */ \
++ "pushl %6\n\t" /* restore EIP */ \
++ "jmp __switch_to\n" \
++ "1:\t" \
++ "popl %%ebp\n\t" \
++ "popfl" \
++ :"=m" (prev->thread.sp), "=m" (prev->thread.ip), \
++ "=a" (last), "=S" (esi), "=D" (edi) \
++ :"m" (next->thread.sp), "m" (next->thread.ip), \
++ "2" (prev), "d" (next)); \
++} while (0)
++
++/*
++ * disable hlt during certain critical i/o operations
++ */
++#define HAVE_DISABLE_HLT
++#else
++#define __SAVE(reg, offset) "movq %%" #reg ",(14-" #offset ")*8(%%rsp)\n\t"
++#define __RESTORE(reg, offset) "movq (14-" #offset ")*8(%%rsp),%%" #reg "\n\t"
++
++/* frame pointer must be last for get_wchan */
++#define SAVE_CONTEXT "pushf ; pushq %%rbp ; movq %%rsi,%%rbp\n\t"
++#define RESTORE_CONTEXT "movq %%rbp,%%rsi ; popq %%rbp ; popf\t"
++
++#define __EXTRA_CLOBBER \
++ , "rcx", "rbx", "rdx", "r8", "r9", "r10", "r11", \
++ "r12", "r13", "r14", "r15"
++
++/* Save restore flags to clear handle leaking NT */
++#define switch_to(prev, next, last) \
++ asm volatile(SAVE_CONTEXT \
++ "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */ \
++ "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */ \
++ "call __switch_to\n\t" \
++ ".globl thread_return\n" \
++ "thread_return:\n\t" \
++ "movq %%gs:%P[pda_pcurrent],%%rsi\n\t" \
++ "movq %P[thread_info](%%rsi),%%r8\n\t" \
++ LOCK_PREFIX "btr %[tif_fork],%P[ti_flags](%%r8)\n\t" \
++ "movq %%rax,%%rdi\n\t" \
++ "jc ret_from_fork\n\t" \
++ RESTORE_CONTEXT \
++ : "=a" (last) \
++ : [next] "S" (next), [prev] "D" (prev), \
++ [threadrsp] "i" (offsetof(struct task_struct, thread.sp)), \
++ [ti_flags] "i" (offsetof(struct thread_info, flags)), \
++ [tif_fork] "i" (TIF_FORK), \
++ [thread_info] "i" (offsetof(struct task_struct, stack)), \
++ [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \
++ : "memory", "cc" __EXTRA_CLOBBER)
++#endif
++
++#ifdef __KERNEL__
++#define _set_base(addr, base) do { unsigned long __pr; \
++__asm__ __volatile__ ("movw %%dx,%1\n\t" \
++ "rorl $16,%%edx\n\t" \
++ "movb %%dl,%2\n\t" \
++ "movb %%dh,%3" \
++ :"=&d" (__pr) \
++ :"m" (*((addr)+2)), \
++ "m" (*((addr)+4)), \
++ "m" (*((addr)+7)), \
++ "0" (base) \
++ ); } while (0)
++
++#define _set_limit(addr, limit) do { unsigned long __lr; \
++__asm__ __volatile__ ("movw %%dx,%1\n\t" \
++ "rorl $16,%%edx\n\t" \
++ "movb %2,%%dh\n\t" \
++ "andb $0xf0,%%dh\n\t" \
++ "orb %%dh,%%dl\n\t" \
++ "movb %%dl,%2" \
++ :"=&d" (__lr) \
++ :"m" (*(addr)), \
++ "m" (*((addr)+6)), \
++ "0" (limit) \
++ ); } while (0)
++
++#define set_base(ldt, base) _set_base(((char *)&(ldt)) , (base))
++#define set_limit(ldt, limit) _set_limit(((char *)&(ldt)) , ((limit)-1))
++
++extern void load_gs_index(unsigned);
++
++/*
++ * Load a segment. Fall back on loading the zero
++ * segment if something goes wrong..
++ */
++#define loadsegment(seg, value) \
++ asm volatile("\n" \
++ "1:\t" \
++ "movl %k0,%%" #seg "\n" \
++ "2:\n" \
++ ".section .fixup,\"ax\"\n" \
++ "3:\t" \
++ "movl %k1, %%" #seg "\n\t" \
++ "jmp 2b\n" \
++ ".previous\n" \
++ _ASM_EXTABLE(1b,3b) \
++ : :"r" (value), "r" (0))
++
++
++/*
++ * Save a segment register away
++ */
++#define savesegment(seg, value) \
++ asm volatile("mov %%" #seg ",%0":"=rm" (value))
++
++static inline unsigned long get_limit(unsigned long segment)
++{
++ unsigned long __limit;
++ __asm__("lsll %1,%0"
++ :"=r" (__limit):"r" (segment));
++ return __limit+1;
++}
++
++static inline void xen_clts(void)
++{
++ HYPERVISOR_fpu_taskswitch(0);
++}
++
++static inline void xen_stts(void)
++{
++ HYPERVISOR_fpu_taskswitch(1);
++}
++
++/*
++ * Volatile isn't enough to prevent the compiler from reordering the
++ * read/write functions for the control registers and messing everything up.
++ * A memory clobber would solve the problem, but would prevent reordering of
++ * all loads stores around it, which can hurt performance. Solution is to
++ * use a variable and mimic reads and writes to it to enforce serialization
++ */
++static unsigned long __force_order;
++
++static inline unsigned long xen_read_cr0(void)
++{
++ unsigned long val;
++ asm volatile("mov %%cr0,%0\n\t" :"=r" (val), "=m" (__force_order));
++ return val;
++}
++
++static inline void xen_write_cr0(unsigned long val)
++{
++ asm volatile("mov %0,%%cr0": :"r" (val), "m" (__force_order));
++}
++
++#define xen_read_cr2() (current_vcpu_info()->arch.cr2)
++#define xen_write_cr2(val) ((void)(current_vcpu_info()->arch.cr2 = (val)))
++
++static inline unsigned long xen_read_cr3(void)
++{
++ unsigned long val;
++ asm volatile("mov %%cr3,%0\n\t" :"=r" (val), "=m" (__force_order));
++#ifdef CONFIG_X86_32
++ return mfn_to_pfn(xen_cr3_to_pfn(val)) << PAGE_SHIFT;
++#else
++ return machine_to_phys(val);
++#endif
++}
++
++static inline void xen_write_cr3(unsigned long val)
++{
++#ifdef CONFIG_X86_32
++ val = xen_pfn_to_cr3(pfn_to_mfn(val >> PAGE_SHIFT));
++#else
++ val = phys_to_machine(val);
++#endif
++ asm volatile("mov %0,%%cr3": :"r" (val), "m" (__force_order));
++}
++
++static inline unsigned long xen_read_cr4(void)
++{
++ unsigned long val;
++ asm volatile("mov %%cr4,%0\n\t" :"=r" (val), "=m" (__force_order));
++ return val;
++}
++
++#define xen_read_cr4_safe() xen_read_cr4()
++
++static inline void xen_write_cr4(unsigned long val)
++{
++ asm volatile("mov %0,%%cr4": :"r" (val), "m" (__force_order));
++}
++
++#ifdef CONFIG_X86_64
++static inline unsigned long xen_read_cr8(void)
++{
++ return 0;
++}
++
++static inline void xen_write_cr8(unsigned long val)
++{
++ BUG_ON(val);
++}
++#endif
++
++static inline void xen_wbinvd(void)
++{
++ asm volatile("wbinvd": : :"memory");
++}
++#define read_cr0() (xen_read_cr0())
++#define write_cr0(x) (xen_write_cr0(x))
++#define read_cr2() (xen_read_cr2())
++#define write_cr2(x) (xen_write_cr2(x))
++#define read_cr3() (xen_read_cr3())
++#define write_cr3(x) (xen_write_cr3(x))
++#define read_cr4() (xen_read_cr4())
++#define read_cr4_safe() (xen_read_cr4_safe())
++#define write_cr4(x) (xen_write_cr4(x))
++#define wbinvd() (xen_wbinvd())
++#ifdef CONFIG_X86_64
++#define read_cr8() (xen_read_cr8())
++#define write_cr8(x) (xen_write_cr8(x))
++#endif
++
++/* Clear the 'TS' bit */
++#define clts() (xen_clts())
++#define stts() (xen_stts())
++
++#endif /* __KERNEL__ */
++
++static inline void clflush(volatile void *__p)
++{
++ asm volatile("clflush %0" : "+m" (*(volatile char __force *)__p));
++}
++
++#define nop() __asm__ __volatile__ ("nop")
++
++void disable_hlt(void);
++void enable_hlt(void);
++
++extern int es7000_plat;
++void cpu_idle_wait(void);
++
++extern unsigned long arch_align_stack(unsigned long sp);
++extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
++
++void default_idle(void);
++
++/*
++ * Force strict CPU ordering.
++ * And yes, this is required on UP too when we're talking
++ * to devices.
++ */
+ #ifdef CONFIG_X86_32
+-# include "system_32.h"
++/*
++ * For now, "wmb()" doesn't actually do anything, as all
++ * Intel CPU's follow what Intel calls a *Processor Order*,
++ * in which all writes are seen in the program order even
++ * outside the CPU.
++ *
++ * I expect future Intel CPU's to have a weaker ordering,
++ * but I'd also expect them to finally get their act together
++ * and add some real memory barriers if so.
++ *
++ * Some non intel clones support out of order store. wmb() ceases to be a
++ * nop for these.
++ */
++#define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
++#define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
++#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM)
++#else
++#define mb() asm volatile("mfence":::"memory")
++#define rmb() asm volatile("lfence":::"memory")
++#define wmb() asm volatile("sfence" ::: "memory")
++#endif
++
++/**
++ * read_barrier_depends - Flush all pending reads that subsequents reads
++ * depend on.
++ *
++ * No data-dependent reads from memory-like regions are ever reordered
++ * over this barrier. All reads preceding this primitive are guaranteed
++ * to access memory (but not necessarily other CPUs' caches) before any
++ * reads following this primitive that depend on the data return by
++ * any of the preceding reads. This primitive is much lighter weight than
++ * rmb() on most CPUs, and is never heavier weight than is
++ * rmb().
++ *
++ * These ordering constraints are respected by both the local CPU
++ * and the compiler.
++ *
++ * Ordering is not guaranteed by anything other than these primitives,
++ * not even by data dependencies. See the documentation for
++ * memory_barrier() for examples and URLs to more information.
++ *
++ * For example, the following code would force ordering (the initial
++ * value of "a" is zero, "b" is one, and "p" is "&a"):
++ *
++ * <programlisting>
++ * CPU 0 CPU 1
++ *
++ * b = 2;
++ * memory_barrier();
++ * p = &b; q = p;
++ * read_barrier_depends();
++ * d = *q;
++ * </programlisting>
++ *
++ * because the read of "*q" depends on the read of "p" and these
++ * two reads are separated by a read_barrier_depends(). However,
++ * the following code, with the same initial values for "a" and "b":
++ *
++ * <programlisting>
++ * CPU 0 CPU 1
++ *
++ * a = 2;
++ * memory_barrier();
++ * b = 3; y = b;
++ * read_barrier_depends();
++ * x = a;
++ * </programlisting>
++ *
++ * does not enforce ordering, since there is no data dependency between
++ * the read of "a" and the read of "b". Therefore, on some CPUs, such
++ * as Alpha, "y" could be set to 3 and "x" to 0. Use rmb()
++ * in cases like this where there are no data dependencies.
++ **/
++
++#define read_barrier_depends() do { } while (0)
++
++#ifdef CONFIG_SMP
++#define smp_mb() mb()
++#ifdef CONFIG_X86_PPRO_FENCE
++# define smp_rmb() rmb()
+ #else
+-# include "system_64.h"
++# define smp_rmb() barrier()
++#endif
++#ifdef CONFIG_X86_OOSTORE
++# define smp_wmb() wmb()
++#else
++# define smp_wmb() barrier()
++#endif
++#define smp_read_barrier_depends() read_barrier_depends()
++#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
++#else
++#define smp_mb() barrier()
++#define smp_rmb() barrier()
++#define smp_wmb() barrier()
++#define smp_read_barrier_depends() do { } while (0)
++#define set_mb(var, value) do { var = value; barrier(); } while (0)
++#endif
++
++/*
++ * Stop RDTSC speculation. This is needed when you need to use RDTSC
++ * (or get_cycles or vread that possibly accesses the TSC) in a defined
++ * code region.
++ *
++ * (Could use an alternative three way for this if there was one.)
++ */
++static inline void rdtsc_barrier(void)
++{
++ alternative(ASM_NOP3, "mfence", X86_FEATURE_MFENCE_RDTSC);
++ alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC);
++}
++
+ #endif
+--- a/include/asm-x86/mach-xen/asm/tlbflush_32.h
++++ /dev/null
+@@ -1,99 +0,0 @@
+-#ifndef _I386_TLBFLUSH_H
+-#define _I386_TLBFLUSH_H
+-
+-#include <linux/mm.h>
+-#include <asm/processor.h>
+-
+-#define __flush_tlb() xen_tlb_flush()
+-#define __flush_tlb_global() xen_tlb_flush()
+-#define __flush_tlb_all() xen_tlb_flush()
+-
+-#define cpu_has_invlpg (boot_cpu_data.x86 > 3)
+-
+-#define __flush_tlb_single(addr) xen_invlpg(addr)
+-
+-#define __flush_tlb_one(addr) __flush_tlb_single(addr)
+-
+-/*
+- * TLB flushing:
+- *
+- * - flush_tlb() flushes the current mm struct TLBs
+- * - flush_tlb_all() flushes all processes TLBs
+- * - flush_tlb_mm(mm) flushes the specified mm context TLB's
+- * - flush_tlb_page(vma, vmaddr) flushes one page
+- * - flush_tlb_range(vma, start, end) flushes a range of pages
+- * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
+- *
+- * ..but the i386 has somewhat limited tlb flushing capabilities,
+- * and page-granular flushes are available only on i486 and up.
+- */
+-
+-#define TLB_FLUSH_ALL 0xffffffff
+-
+-
+-#ifndef CONFIG_SMP
+-
+-#include <linux/sched.h>
+-
+-#define flush_tlb() __flush_tlb()
+-#define flush_tlb_all() __flush_tlb_all()
+-#define local_flush_tlb() __flush_tlb()
+-
+-static inline void flush_tlb_mm(struct mm_struct *mm)
+-{
+- if (mm == current->active_mm)
+- __flush_tlb();
+-}
+-
+-static inline void flush_tlb_page(struct vm_area_struct *vma,
+- unsigned long addr)
+-{
+- if (vma->vm_mm == current->active_mm)
+- __flush_tlb_one(addr);
+-}
+-
+-static inline void flush_tlb_range(struct vm_area_struct *vma,
+- unsigned long start, unsigned long end)
+-{
+- if (vma->vm_mm == current->active_mm)
+- __flush_tlb();
+-}
+-
+-#else /* SMP */
+-
+-#include <asm/smp.h>
+-
+-#define local_flush_tlb() \
+- __flush_tlb()
+-
+-#define flush_tlb_all xen_tlb_flush_all
+-#define flush_tlb_current_task() xen_tlb_flush_mask(¤t->mm->cpu_vm_mask)
+-#define flush_tlb_mm(mm) xen_tlb_flush_mask(&(mm)->cpu_vm_mask)
+-#define flush_tlb_page(vma, va) xen_invlpg_mask(&(vma)->vm_mm->cpu_vm_mask, va)
+-
+-#define flush_tlb() flush_tlb_current_task()
+-
+-static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
+-{
+- flush_tlb_mm(vma->vm_mm);
+-}
+-
+-#define TLBSTATE_OK 1
+-#define TLBSTATE_LAZY 2
+-
+-struct tlb_state
+-{
+- struct mm_struct *active_mm;
+- int state;
+- char __cacheline_padding[L1_CACHE_BYTES-8];
+-};
+-DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
+-#endif /* SMP */
+-
+-static inline void flush_tlb_kernel_range(unsigned long start,
+- unsigned long end)
+-{
+- flush_tlb_all();
+-}
+-
+-#endif /* _I386_TLBFLUSH_H */
+--- a/include/asm-x86/mach-xen/asm/tlbflush_64.h
++++ /dev/null
+@@ -1,97 +0,0 @@
+-#ifndef _X8664_TLBFLUSH_H
+-#define _X8664_TLBFLUSH_H
+-
+-#include <linux/mm.h>
+-#include <linux/sched.h>
+-#include <asm/processor.h>
+-#include <asm/system.h>
+-
+-#define __flush_tlb() xen_tlb_flush()
+-
+-/*
+- * Global pages have to be flushed a bit differently. Not a real
+- * performance problem because this does not happen often.
+- */
+-#define __flush_tlb_global() xen_tlb_flush()
+-
+-#define __flush_tlb_all() __flush_tlb_global()
+-
+-#define __flush_tlb_one(addr) xen_invlpg((unsigned long)addr)
+-
+-
+-/*
+- * TLB flushing:
+- *
+- * - flush_tlb() flushes the current mm struct TLBs
+- * - flush_tlb_all() flushes all processes TLBs
+- * - flush_tlb_mm(mm) flushes the specified mm context TLB's
+- * - flush_tlb_page(vma, vmaddr) flushes one page
+- * - flush_tlb_range(vma, start, end) flushes a range of pages
+- * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
+- *
+- * x86-64 can only flush individual pages or full VMs. For a range flush
+- * we always do the full VM. Might be worth trying if for a small
+- * range a few INVLPGs in a row are a win.
+- */
+-
+-#ifndef CONFIG_SMP
+-
+-#define flush_tlb() __flush_tlb()
+-#define flush_tlb_all() __flush_tlb_all()
+-#define local_flush_tlb() __flush_tlb()
+-
+-static inline void flush_tlb_mm(struct mm_struct *mm)
+-{
+- if (mm == current->active_mm)
+- __flush_tlb();
+-}
+-
+-static inline void flush_tlb_page(struct vm_area_struct *vma,
+- unsigned long addr)
+-{
+- if (vma->vm_mm == current->active_mm)
+- __flush_tlb_one(addr);
+-}
+-
+-static inline void flush_tlb_range(struct vm_area_struct *vma,
+- unsigned long start, unsigned long end)
+-{
+- if (vma->vm_mm == current->active_mm)
+- __flush_tlb();
+-}
+-
+-#else
+-
+-#include <asm/smp.h>
+-
+-#define local_flush_tlb() \
+- __flush_tlb()
+-
+-#define flush_tlb_all xen_tlb_flush_all
+-#define flush_tlb_current_task() xen_tlb_flush_mask(¤t->mm->cpu_vm_mask)
+-#define flush_tlb_mm(mm) xen_tlb_flush_mask(&(mm)->cpu_vm_mask)
+-#define flush_tlb_page(vma, va) xen_invlpg_mask(&(vma)->vm_mm->cpu_vm_mask, va)
+-
+-#define flush_tlb() flush_tlb_current_task()
+-
+-static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
+-{
+- flush_tlb_mm(vma->vm_mm);
+-}
+-
+-#define TLBSTATE_OK 1
+-#define TLBSTATE_LAZY 2
+-
+-/* Roughly an IPI every 20MB with 4k pages for freeing page table
+- ranges. Cost is about 42k of memory for each CPU. */
+-#define ARCH_FREE_PTE_NR 5350
+-
+-#endif
+-
+-static inline void flush_tlb_kernel_range(unsigned long start,
+- unsigned long end)
+-{
+- flush_tlb_all();
+-}
+-
+-#endif /* _X8664_TLBFLUSH_H */
+--- a/include/asm-x86/mach-xen/asm/tlbflush.h
++++ b/include/asm-x86/mach-xen/asm/tlbflush.h
+@@ -1,5 +1,106 @@
++#ifndef _ASM_X86_TLBFLUSH_H
++#define _ASM_X86_TLBFLUSH_H
++
++#include <linux/mm.h>
++#include <linux/sched.h>
++
++#include <asm/processor.h>
++#include <asm/system.h>
++
++#define __flush_tlb() xen_tlb_flush()
++#define __flush_tlb_global() xen_tlb_flush()
++#define __flush_tlb_single(addr) xen_invlpg(addr)
++#define __flush_tlb_all() xen_tlb_flush()
++#define __flush_tlb_one(addr) xen_invlpg(addr)
++
+ #ifdef CONFIG_X86_32
+-# include "tlbflush_32.h"
++# define TLB_FLUSH_ALL 0xffffffff
+ #else
+-# include "tlbflush_64.h"
++# define TLB_FLUSH_ALL -1ULL
+ #endif
++
++/*
++ * TLB flushing:
++ *
++ * - flush_tlb() flushes the current mm struct TLBs
++ * - flush_tlb_all() flushes all processes TLBs
++ * - flush_tlb_mm(mm) flushes the specified mm context TLB's
++ * - flush_tlb_page(vma, vmaddr) flushes one page
++ * - flush_tlb_range(vma, start, end) flushes a range of pages
++ * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
++ *
++ * ..but the i386 has somewhat limited tlb flushing capabilities,
++ * and page-granular flushes are available only on i486 and up.
++ *
++ * x86-64 can only flush individual pages or full VMs. For a range flush
++ * we always do the full VM. Might be worth trying if for a small
++ * range a few INVLPGs in a row are a win.
++ */
++
++#ifndef CONFIG_SMP
++
++#define flush_tlb() __flush_tlb()
++#define flush_tlb_all() __flush_tlb_all()
++#define local_flush_tlb() __flush_tlb()
++
++static inline void flush_tlb_mm(struct mm_struct *mm)
++{
++ if (mm == current->active_mm)
++ __flush_tlb();
++}
++
++static inline void flush_tlb_page(struct vm_area_struct *vma,
++ unsigned long addr)
++{
++ if (vma->vm_mm == current->active_mm)
++ __flush_tlb_one(addr);
++}
++
++static inline void flush_tlb_range(struct vm_area_struct *vma,
++ unsigned long start, unsigned long end)
++{
++ if (vma->vm_mm == current->active_mm)
++ __flush_tlb();
++}
++
++#else /* SMP */
++
++#include <asm/smp.h>
++
++#define local_flush_tlb() __flush_tlb()
++
++#define flush_tlb_all xen_tlb_flush_all
++#define flush_tlb_current_task() xen_tlb_flush_mask(¤t->mm->cpu_vm_mask)
++#define flush_tlb_mm(mm) xen_tlb_flush_mask(&(mm)->cpu_vm_mask)
++#define flush_tlb_page(vma, va) xen_invlpg_mask(&(vma)->vm_mm->cpu_vm_mask, va)
++
++#define flush_tlb() flush_tlb_current_task()
++
++static inline void flush_tlb_range(struct vm_area_struct *vma,
++ unsigned long start, unsigned long end)
++{
++ flush_tlb_mm(vma->vm_mm);
++}
++
++#define TLBSTATE_OK 1
++#define TLBSTATE_LAZY 2
++
++#ifdef CONFIG_X86_32
++struct tlb_state
++{
++ struct mm_struct *active_mm;
++ int state;
++ char __cacheline_padding[L1_CACHE_BYTES-8];
++};
++DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
++#endif
++
++#endif /* SMP */
++
++static inline void flush_tlb_kernel_range(unsigned long start,
++ unsigned long end)
++{
++ flush_tlb_all();
++}
++
++#endif /* _ASM_X86_TLBFLUSH_H */
+--- a/include/asm-x86/mach-xen/irq_vectors.h
++++ b/include/asm-x86/mach-xen/irq_vectors.h
+@@ -82,7 +82,8 @@
+
+ #define RESCHEDULE_VECTOR 0
+ #define CALL_FUNCTION_VECTOR 1
+-#define NR_IPIS 2
++#define SPIN_UNLOCK_VECTOR 2
++#define NR_IPIS 3
+
+ /*
+ * The maximum number of vectors supported by i386 processors
+--- a/include/asm-x86/mmu.h
++++ b/include/asm-x86/mmu.h
+@@ -23,7 +23,7 @@ typedef struct {
+ void *vdso;
+ } mm_context_t;
+
+-#ifdef CONFIG_SMP
++#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
+ void leave_mm(int cpu);
+ #else
+ static inline void leave_mm(int cpu)
+--- a/include/asm-x86/ptrace.h
++++ b/include/asm-x86/ptrace.h
+@@ -249,7 +249,9 @@ extern void user_enable_single_step(stru
+ extern void user_disable_single_step(struct task_struct *);
+
+ extern void user_enable_block_step(struct task_struct *);
+-#ifdef CONFIG_X86_DEBUGCTLMSR
++#if defined(CONFIG_XEN)
++#define arch_has_block_step() (0)
++#elif defined(CONFIG_X86_DEBUGCTLMSR)
+ #define arch_has_block_step() (1)
+ #else
+ #define arch_has_block_step() (boot_cpu_data.x86 >= 6)
+--- a/include/asm-x86/thread_info.h
++++ b/include/asm-x86/thread_info.h
+@@ -94,6 +94,9 @@ struct thread_info {
+ #define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
+ #define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
+ #define TIF_BTS_TRACE_TS 27 /* record scheduling event timestamps */
++#ifdef CONFIG_X86_XEN
++#define TIF_CSTAR 31 /* cstar-based syscall (special handling) */
++#endif
+
+ #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
+ #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
+@@ -118,6 +121,7 @@ struct thread_info {
+ #define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
+ #define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
+ #define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)
++#define _TIF_CSTAR (1 << TIF_CSTAR)
+
+ /* work to do in syscall_trace_enter() */
+ #define _TIF_WORK_SYSCALL_ENTRY \
+@@ -147,12 +151,12 @@ struct thread_info {
+ (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_BTS_TRACE_TS| \
+ _TIF_NOTSC|_TIF_PERFMON_CTXSW)
+
+-#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
+-#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
+ #else
+-#define _TIF_WORK_CTXSW_NEXT (_TIF_NOTSC | _TIF_DEBUG)
+-#define _TIF_WORK_CTXSW_PREV (_TIF_NOTSC)
++#define _TIF_WORK_CTXSW (_TIF_NOTSC \
++ /*todo | _TIF_DEBUGCTLMSR | _TIF_DS_AREA_MSR | _TIF_BTS_TRACE_TS*/)
+ #endif
++#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
++#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
+
+ #define PREEMPT_ACTIVE 0x10000000
+
+--- a/include/asm-x86/time.h
++++ b/include/asm-x86/time.h
+@@ -58,4 +58,10 @@ static inline int native_set_wallclock(u
+
+ extern unsigned long __init calibrate_cpu(void);
+
++#ifdef CONFIG_XEN
++extern int xen_independent_wallclock(void);
++extern unsigned long xen_read_persistent_clock(void);
++extern int xen_update_persistent_clock(void);
++#endif
++
+ #endif
+--- a/include/linux/page-flags.h
++++ b/include/linux/page-flags.h
+@@ -101,8 +101,8 @@ enum pageflags {
+ PG_foreign, /* Page is owned by foreign allocator. */
+ PG_pinned, /* Cannot alias with PG_owner_priv_1 since
+ * bad_page() checks include this bit.
+- * Also cannot use PG_arch_1 since that now
+- * has a different purpose on x86. */
++ * Should not use PG_arch_1 as that may have
++ * a different purpose elsewhere. */
+ #endif
+ __NR_PAGEFLAGS,
+
+--- a/include/linux/pci.h
++++ b/include/linux/pci.h
+@@ -644,6 +644,9 @@ int pcie_set_readrq(struct pci_dev *dev,
+ void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
+ int __must_check pci_assign_resource(struct pci_dev *dev, int i);
+ int pci_select_bars(struct pci_dev *dev, unsigned long flags);
++#ifdef CONFIG_XEN
++void pci_restore_bars(struct pci_dev *);
++#endif
+
+ /* ROM control related routines */
+ void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
+--- a/include/xen/evtchn.h
++++ b/include/xen/evtchn.h
+@@ -130,12 +130,37 @@ static inline void clear_evtchn(int port
+ synch_clear_bit(port, s->evtchn_pending);
+ }
+
++static inline void set_evtchn(int port)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++ synch_set_bit(port, s->evtchn_pending);
++}
++
++static inline int test_evtchn(int port)
++{
++ shared_info_t *s = HYPERVISOR_shared_info;
++ return synch_test_bit(port, s->evtchn_pending);
++}
++
+ static inline void notify_remote_via_evtchn(int port)
+ {
+ struct evtchn_send send = { .port = port };
+ VOID(HYPERVISOR_event_channel_op(EVTCHNOP_send, &send));
+ }
+
++/* Clear an irq's pending state, in preparation for polling on it. */
++void xen_clear_irq_pending(int irq);
++
++/* Set an irq's pending state, to avoid blocking on it. */
++void xen_set_irq_pending(int irq);
++
++/* Test an irq's pending state. */
++int xen_test_irq_pending(int irq);
++
++/* Poll waiting for an irq to become pending. In the usual case, the
++ irq will be disabled so it won't deliver an interrupt. */
++void xen_poll_irq(int irq);
++
+ /*
+ * Use these to access the event channel underlying the IRQ handle returned
+ * by bind_*_to_irqhandler().
+--- a/kernel/sysctl_check.c
++++ b/kernel/sysctl_check.c
+@@ -899,7 +899,7 @@ static const struct trans_ctl_table tran
+ };
+
+ #ifdef CONFIG_XEN
+-static struct trans_ctl_table trans_xen_table[] = {
++static const struct trans_ctl_table trans_xen_table[] = {
+ { CTL_XEN_INDEPENDENT_WALLCLOCK, "independent_wallclock" },
+ { CTL_XEN_PERMITTED_CLOCK_JITTER, "permitted_clock_jitter" },
+ {}
+--- a/lib/swiotlb-xen.c
++++ b/lib/swiotlb-xen.c
+@@ -30,7 +30,6 @@
+ #include <asm/gnttab_dma.h>
+
+ int swiotlb;
+-EXPORT_SYMBOL(swiotlb);
+
+ #define OFFSET(val,align) ((unsigned long)((val) & ( (align) - 1)))
+
+@@ -289,6 +288,15 @@ __sync_single(struct phys_addr buffer, c
+ }
+ }
+
++static inline unsigned int is_span_boundary(unsigned int index,
++ unsigned int nslots,
++ unsigned long offset_slots,
++ unsigned long max_slots)
++{
++ unsigned long offset = (offset_slots + index) & (max_slots - 1);
++ return offset + nslots > max_slots;
++}
++
+ /*
+ * Allocates bounce buffer and returns its kernel virtual address.
+ */
+@@ -300,6 +308,15 @@ map_single(struct device *hwdev, struct
+ unsigned int nslots, stride, index, wrap;
+ struct phys_addr slot_buf;
+ int i;
++ unsigned long mask;
++ unsigned long offset_slots;
++ unsigned long max_slots;
++
++ mask = dma_get_seg_boundary(hwdev);
++ offset_slots = -IO_TLB_SEGSIZE;
++ max_slots = mask + 1
++ ? ALIGN(mask + 1, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT
++ : 1UL << (BITS_PER_LONG - IO_TLB_SHIFT);
+
+ /*
+ * For mappings greater than a page, we limit the stride (and
+@@ -319,12 +336,21 @@ map_single(struct device *hwdev, struct
+ */
+ spin_lock_irqsave(&io_tlb_lock, flags);
+ {
+- wrap = index = ALIGN(io_tlb_index, stride);
+-
++ index = ALIGN(io_tlb_index, stride);
+ if (index >= iotlb_nslabs)
+- wrap = index = 0;
++ index = 0;
++ wrap = index;
+
+ do {
++ while (is_span_boundary(index, nslots, offset_slots,
++ max_slots)) {
++ index += stride;
++ if (index >= iotlb_nslabs)
++ index = 0;
++ if (index == wrap)
++ goto not_found;
++ }
++
+ /*
+ * If we find a slot that indicates we have 'nslots'
+ * number of contiguous buffers, we allocate the
+@@ -359,6 +385,7 @@ map_single(struct device *hwdev, struct
+ index = 0;
+ } while (index != wrap);
+
++ not_found:
+ spin_unlock_irqrestore(&io_tlb_lock, flags);
+ return NULL;
+ }
--- /dev/null
+From: kernel.org
+Subject: 2.6.26
+Patch-mainline: 2.6.26
+
+Acked-by: Jeff Mahoney <jeffm@suse.com>
+Automatically created from "patches.kernel.org/patch-2.6.26" by xen-port-patches.py
+
+---
+ arch/x86/Kconfig | 10
+ arch/x86/ia32/ia32entry-xen.S | 14
+ arch/x86/kernel/Makefile | 5
+ arch/x86/kernel/acpi/Makefile | 2
+ arch/x86/kernel/acpi/boot.c | 8
+ arch/x86/kernel/acpi/sleep-xen.c | 87 +
+ arch/x86/kernel/cpu/common-xen.c | 158 +--
+ arch/x86/kernel/cpu/mtrr/main-xen.c | 138 +++
+ arch/x86/kernel/e820_32-xen.c | 32
+ arch/x86/kernel/e820_64-xen.c | 197 +++-
+ arch/x86/kernel/early_printk-xen.c | 24
+ arch/x86/kernel/entry_32-xen.S | 44
+ arch/x86/kernel/entry_64-xen.S | 8
+ arch/x86/kernel/genapic_64-xen.c | 55 +
+ arch/x86/kernel/genapic_xen_64.c | 4
+ arch/x86/kernel/head64-xen.c | 101 +-
+ arch/x86/kernel/head_32-xen.S | 2
+ arch/x86/kernel/init_task-xen.c | 1
+ arch/x86/kernel/io_apic_32-xen.c | 155 +--
+ arch/x86/kernel/io_apic_64-xen.c | 67 -
+ arch/x86/kernel/ipi-xen.c | 232 +++++
+ arch/x86/kernel/irq_32-xen.c | 6
+ arch/x86/kernel/machine_kexec_64.c | 2
+ arch/x86/kernel/microcode-xen.c | 2
+ arch/x86/kernel/mmconf-fam10h_64.c | 10
+ arch/x86/kernel/mpparse-xen.c | 1104 ++++++++++++++++++++++++
+ arch/x86/kernel/mpparse_32-xen.c | 1161 --------------------------
+ arch/x86/kernel/mpparse_64-xen.c | 879 -------------------
+ arch/x86/kernel/pci-dma-xen.c | 735 +++++++++-------
+ arch/x86/kernel/pci-nommu-xen.c | 103 ++
+ arch/x86/kernel/process-xen.c | 188 ++++
+ arch/x86/kernel/process_32-xen.c | 146 +--
+ arch/x86/kernel/process_64-xen.c | 165 ++-
+ arch/x86/kernel/setup-xen.c | 141 +++
+ arch/x86/kernel/setup64-xen.c | 103 --
+ arch/x86/kernel/setup_32-xen.c | 127 ++
+ arch/x86/kernel/setup_64-xen.c | 303 +++---
+ arch/x86/kernel/smp-xen.c | 329 +++++++
+ arch/x86/kernel/smp_32-xen.c | 647 --------------
+ arch/x86/kernel/smp_64-xen.c | 554 ------------
+ arch/x86/kernel/time_32-xen.c | 2
+ arch/x86/kernel/traps_32-xen.c | 592 +++++++------
+ arch/x86/kernel/traps_64-xen.c | 46 -
+ arch/x86/kernel/vsyscall_64-xen.c | 2
+ arch/x86/mm/fault-xen.c | 11
+ arch/x86/mm/highmem_32-xen.c | 1
+ arch/x86/mm/init_32-xen.c | 122 +-
+ arch/x86/mm/init_64-xen.c | 292 +++++-
+ arch/x86/mm/ioremap-xen.c | 269 ++++--
+ arch/x86/mm/pageattr-xen.c | 481 ++--------
+ arch/x86/mm/pat-xen.c | 602 +++++++++++++
+ arch/x86/mm/pgtable-xen.c | 709 +++++++++++++++
+ arch/x86/mm/pgtable_32-xen.c | 242 -----
+ arch/x86/pci/i386.c | 4
+ arch/x86/pci/irq-xen.c | 23
+ arch/x86/vdso/vdso32-setup-xen.c | 15
+ drivers/acpi/processor_core.c | 2
+ drivers/input/xen-kbdfront.c | 1
+ drivers/oprofile/cpu_buffer.c | 2
+ drivers/pci/msi-xen.c | 12
+ drivers/video/Kconfig | 2
+ drivers/video/xen-fbfront.c | 1
+ drivers/xen/Kconfig | 2
+ drivers/xen/Makefile | 8
+ drivers/xen/blkfront/blkfront.c | 4
+ drivers/xen/blkfront/block.h | 1
+ drivers/xen/blkfront/vbd.c | 58 -
+ drivers/xen/blktap/blktap.c | 27
+ drivers/xen/char/mem.c | 53 +
+ drivers/xen/console/console.c | 13
+ drivers/xen/core/machine_kexec.c | 8
+ drivers/xen/core/machine_reboot.c | 8
+ drivers/xen/core/smpboot.c | 23
+ drivers/xen/core/xen_proc.c | 2
+ drivers/xen/fbfront/xenfb.c | 24
+ drivers/xen/gntdev/gntdev.c | 8
+ drivers/xen/netfront/netfront.c | 6
+ drivers/xen/privcmd/privcmd.c | 8
+ drivers/xen/xenbus/xenbus_client.c | 6
+ drivers/xen/xenbus/xenbus_probe.c | 25
+ fs/aio.c | 15
+ include/asm-x86/dma-mapping.h | 5
+ include/asm-x86/genapic_64.h | 5
+ include/asm-x86/mach-xen/asm/desc.h | 65 -
+ include/asm-x86/mach-xen/asm/dma-mapping.h | 22
+ include/asm-x86/mach-xen/asm/dma-mapping_32.h | 141 ---
+ include/asm-x86/mach-xen/asm/dma-mapping_64.h | 205 ----
+ include/asm-x86/mach-xen/asm/fixmap.h | 8
+ include/asm-x86/mach-xen/asm/fixmap_32.h | 22
+ include/asm-x86/mach-xen/asm/fixmap_64.h | 27
+ include/asm-x86/mach-xen/asm/highmem.h | 2
+ include/asm-x86/mach-xen/asm/io.h | 17
+ include/asm-x86/mach-xen/asm/io_32.h | 156 +--
+ include/asm-x86/mach-xen/asm/io_64.h | 124 +-
+ include/asm-x86/mach-xen/asm/irqflags.h | 8
+ include/asm-x86/mach-xen/asm/mmu_context_32.h | 12
+ include/asm-x86/mach-xen/asm/mmu_context_64.h | 15
+ include/asm-x86/mach-xen/asm/page.h | 20
+ include/asm-x86/mach-xen/asm/page_64.h | 10
+ include/asm-x86/mach-xen/asm/pci.h | 11
+ include/asm-x86/mach-xen/asm/pci_64.h | 16
+ include/asm-x86/mach-xen/asm/pgalloc.h | 152 +++
+ include/asm-x86/mach-xen/asm/pgalloc_32.h | 111 --
+ include/asm-x86/mach-xen/asm/pgalloc_64.h | 179 ----
+ include/asm-x86/mach-xen/asm/pgtable-3level.h | 43
+ include/asm-x86/mach-xen/asm/pgtable.h | 292 ++++--
+ include/asm-x86/mach-xen/asm/pgtable_32.h | 107 +-
+ include/asm-x86/mach-xen/asm/pgtable_64.h | 156 +--
+ include/asm-x86/mach-xen/asm/processor.h | 688 ++++++++-------
+ include/asm-x86/mach-xen/asm/segment.h | 3
+ include/asm-x86/mach-xen/asm/smp.h | 228 +++++
+ include/asm-x86/mach-xen/asm/smp_32.h | 178 ---
+ include/asm-x86/mach-xen/asm/smp_64.h | 103 --
+ include/asm-x86/mach-xen/asm/spinlock.h | 18
+ include/asm-x86/mach-xen/asm/swiotlb.h | 13
+ include/asm-x86/mach-xen/asm/swiotlb_32.h | 43
+ include/asm-x86/mach-xen/asm/system.h | 107 +-
+ include/asm-x86/mach-xen/asm/tlbflush.h | 3
+ include/asm-x86/mach-xen/asm/vga.h | 4
+ include/asm-x86/mach-xen/asm/xor_64.h | 294 +++---
+ include/asm-x86/scatterlist.h | 2
+ include/linux/page-flags.h | 31
+ include/xen/balloon.h | 10
+ include/xen/interface/grant_table.h | 7
+ include/xen/interface/io/fbif.h | 5
+ include/xen/interface/memory.h | 17
+ include/xen/interface/vcpu.h | 4
+ lib/swiotlb-xen.c | 236 ++---
+ 128 files changed, 8046 insertions(+), 7660 deletions(-)
+
+--- a/arch/x86/ia32/ia32entry-xen.S
++++ b/arch/x86/ia32/ia32entry-xen.S
+@@ -129,12 +129,14 @@ sysenter_tracesys:
+ SAVE_REST
+ CLEAR_RREGS
+ movq %r9,R9(%rsp)
+- movq $-ENOSYS,RAX(%rsp) /* really needed? */
++ movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
+ xchgl %ebp,%r9d
++ cmpl $(IA32_NR_syscalls-1),%eax
++ ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */
+ jmp sysenter_do_call
+ CFI_ENDPROC
+ ENDPROC(ia32_sysenter_target)
+@@ -200,13 +202,15 @@ cstar_tracesys:
+ SAVE_REST
+ CLEAR_RREGS
+ movq %r9,R9(%rsp)
+- movq $-ENOSYS,RAX(%rsp) /* really needed? */
++ movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
+ xchgl %ebp,%r9d
+ movl RSP-ARGOFFSET(%rsp), %r8d
++ cmpl $(IA32_NR_syscalls-1),%eax
++ ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */
+ jmp cstar_do_call
+ END(ia32_cstar_target)
+
+@@ -264,7 +268,7 @@ ENTRY(ia32_syscall)
+ jnz ia32_tracesys
+ ia32_do_syscall:
+ cmpl $(IA32_NR_syscalls-1),%eax
+- ja ia32_badsys
++ ja int_ret_from_sys_call /* ia32_tracesys has set RAX(%rsp) */
+ IA32_ARG_FIXUP
+ call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
+ ia32_sysret:
+@@ -274,7 +278,7 @@ ia32_sysret:
+ ia32_tracesys:
+ SAVE_REST
+ CLEAR_RREGS
+- movq $-ENOSYS,RAX(%rsp) /* really needed? */
++ movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
+ movq %rsp,%rdi /* &pt_regs -> arg1 */
+ call syscall_trace_enter
+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */
+@@ -365,7 +369,7 @@ ia32_sys_call_table:
+ .quad sys_setuid16
+ .quad sys_getuid16
+ .quad compat_sys_stime /* stime */ /* 25 */
+- .quad sys32_ptrace /* ptrace */
++ .quad compat_sys_ptrace /* ptrace */
+ .quad sys_alarm
+ .quad sys_fstat /* (old)fstat */
+ .quad sys_pause
+--- a/arch/x86/Kconfig
++++ b/arch/x86/Kconfig
+@@ -28,6 +28,6 @@ config X86
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_FTRACE
+ select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64) && !XEN
+- select HAVE_ARCH_KGDB if !X86_VOYAGER
++ select HAVE_ARCH_KGDB if !X86_VOYAGER && !XEN
+ select HAVE_GENERIC_DMA_COHERENT if X86_32
+ select HAVE_EFFICIENT_UNALIGNED_ACCESS
+@@ -482,6 +482,7 @@ config PARAVIRT_DEBUG
+
+ config MEMTEST
+ bool "Memtest"
++ depends on !XEN
+ help
+ This option adds a kernel parameter 'memtest', which allows memtest
+ to be set.
+@@ -1345,8 +1346,7 @@ source kernel/Kconfig.hz
+
+ config KEXEC
+ bool "kexec system call"
+- depends on X86_BIOS_REBOOT
+- depends on !XEN_UNPRIVILEGED_GUEST
++ depends on X86_BIOS_REBOOT || (XEN && !XEN_UNPRIVILEGED_GUEST)
+ help
+ kexec is a system call that implements the ability to shutdown your
+ current kernel, and to start another kernel. It is like a reboot
+@@ -1944,6 +1944,4 @@ source "crypto/Kconfig"
+
+ source "arch/x86/kvm/Kconfig"
+
+-source "drivers/xen/Kconfig"
+-
+ source "lib/Kconfig"
+--- a/arch/x86/kernel/acpi/boot.c
++++ b/arch/x86/kernel/acpi/boot.c
+@@ -251,19 +251,23 @@ static int __init acpi_parse_madt(struct
+
+ static void __cpuinit acpi_register_lapic(int id, u8 enabled)
+ {
++#ifndef CONFIG_XEN
+ unsigned int ver = 0;
++#endif
+
+ if (!enabled) {
+ ++disabled_cpus;
+ return;
+ }
+
++#ifndef CONFIG_XEN
+ #ifdef CONFIG_X86_32
+ if (boot_cpu_physical_apicid != -1U)
+ ver = apic_version[boot_cpu_physical_apicid];
+ #endif
+
+ generic_processor_info(id, ver);
++#endif
+ }
+
+ static int __init
+@@ -774,6 +778,7 @@ static int __init acpi_parse_fadt(struct
+ * returns 0 on success, < 0 on error
+ */
+
++#ifndef CONFIG_XEN
+ static void __init acpi_register_lapic_address(unsigned long address)
+ {
+ mp_lapic_addr = address;
+@@ -787,6 +792,9 @@ static void __init acpi_register_lapic_a
+ #endif
+ }
+ }
++#else
++#define acpi_register_lapic_address(address)
++#endif
+
+ static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
+ {
+--- a/arch/x86/kernel/acpi/Makefile
++++ b/arch/x86/kernel/acpi/Makefile
+@@ -15,4 +15,4 @@ $(obj)/wakeup_rm.o: $(obj)/realmode/w
+ $(obj)/realmode/wakeup.bin: FORCE
+ $(Q)$(MAKE) $(build)=$(obj)/realmode
+
+-disabled-obj-$(CONFIG_XEN) := cstate.o wakeup_$(BITS).o
++disabled-obj-$(CONFIG_XEN) := cstate.o wakeup_%.o
+--- a/arch/x86/kernel/acpi/sleep-xen.c
++++ b/arch/x86/kernel/acpi/sleep-xen.c
+@@ -10,15 +10,19 @@
+ #include <linux/dmi.h>
+ #include <linux/cpumask.h>
+
+-#include <asm/smp.h>
++#include "realmode/wakeup.h"
++#include "sleep.h"
+
+ #ifndef CONFIG_ACPI_PV_SLEEP
+-/* address in low memory of the wakeup routine. */
+-unsigned long acpi_wakeup_address = 0;
++unsigned long acpi_wakeup_address;
+ unsigned long acpi_realmode_flags;
+-extern char wakeup_start, wakeup_end;
+
+-extern unsigned long acpi_copy_wakeup_routine(unsigned long);
++/* address in low memory of the wakeup routine. */
++static unsigned long acpi_realmode;
++
++#ifdef CONFIG_64BIT
++static char temp_stack[10240];
++#endif
+ #endif
+
+ /**
+@@ -26,17 +30,69 @@ extern unsigned long acpi_copy_wakeup_ro
+ *
+ * Create an identity mapped page table and copy the wakeup routine to
+ * low memory.
++ *
++ * Note that this is too late to change acpi_wakeup_address.
+ */
+ int acpi_save_state_mem(void)
+ {
+ #ifndef CONFIG_ACPI_PV_SLEEP
+- if (!acpi_wakeup_address) {
+- printk(KERN_ERR "Could not allocate memory during boot, S3 disabled\n");
++ struct wakeup_header *header;
++
++ if (!acpi_realmode) {
++ printk(KERN_ERR "Could not allocate memory during boot, "
++ "S3 disabled\n");
+ return -ENOMEM;
+ }
+- memcpy((void *)acpi_wakeup_address, &wakeup_start,
+- &wakeup_end - &wakeup_start);
+- acpi_copy_wakeup_routine(acpi_wakeup_address);
++ memcpy((void *)acpi_realmode, &wakeup_code_start, WAKEUP_SIZE);
++
++ header = (struct wakeup_header *)(acpi_realmode + HEADER_OFFSET);
++ if (header->signature != 0x51ee1111) {
++ printk(KERN_ERR "wakeup header does not match\n");
++ return -EINVAL;
++ }
++
++ header->video_mode = saved_video_mode;
++
++ header->wakeup_jmp_seg = acpi_wakeup_address >> 4;
++ /* GDT[0]: GDT self-pointer */
++ header->wakeup_gdt[0] =
++ (u64)(sizeof(header->wakeup_gdt) - 1) +
++ ((u64)(acpi_wakeup_address +
++ ((char *)&header->wakeup_gdt - (char *)acpi_realmode))
++ << 16);
++ /* GDT[1]: real-mode-like code segment */
++ header->wakeup_gdt[1] = (0x009bULL << 40) +
++ ((u64)acpi_wakeup_address << 16) + 0xffff;
++ /* GDT[2]: real-mode-like data segment */
++ header->wakeup_gdt[2] = (0x0093ULL << 40) +
++ ((u64)acpi_wakeup_address << 16) + 0xffff;
++
++#ifndef CONFIG_64BIT
++ store_gdt((struct desc_ptr *)&header->pmode_gdt);
++
++ header->pmode_efer_low = nx_enabled;
++ if (header->pmode_efer_low & 1) {
++ /* This is strange, why not save efer, always? */
++ rdmsr(MSR_EFER, header->pmode_efer_low,
++ header->pmode_efer_high);
++ }
++#endif /* !CONFIG_64BIT */
++
++ header->pmode_cr0 = read_cr0();
++ header->pmode_cr4 = read_cr4();
++ header->realmode_flags = acpi_realmode_flags;
++ header->real_magic = 0x12345678;
++
++#ifndef CONFIG_64BIT
++ header->pmode_entry = (u32)&wakeup_pmode_return;
++ header->pmode_cr3 = (u32)(swsusp_pg_dir - __PAGE_OFFSET);
++ saved_magic = 0x12345678;
++#else /* CONFIG_64BIT */
++ header->trampoline_segment = setup_trampoline() >> 4;
++ init_rsp = (unsigned long)temp_stack + 4096;
++ initial_code = (unsigned long)wakeup_long64;
++ saved_magic = 0x123456789abcdef0;
++#endif /* CONFIG_64BIT */
+ #endif
+
+ return 0;
+@@ -61,15 +117,20 @@ void acpi_restore_state_mem(void)
+ void __init acpi_reserve_bootmem(void)
+ {
+ #ifndef CONFIG_ACPI_PV_SLEEP
+- if ((&wakeup_end - &wakeup_start) > PAGE_SIZE*2) {
++ if ((&wakeup_code_end - &wakeup_code_start) > WAKEUP_SIZE) {
+ printk(KERN_ERR
+ "ACPI: Wakeup code way too big, S3 disabled.\n");
+ return;
+ }
+
+- acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE*2);
+- if (!acpi_wakeup_address)
++ acpi_realmode = (unsigned long)alloc_bootmem_low(WAKEUP_SIZE);
++
++ if (!acpi_realmode) {
+ printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
++ return;
++ }
++
++ acpi_wakeup_address = virt_to_phys((void *)acpi_realmode);
+ #endif
+ }
+
+--- a/arch/x86/kernel/cpu/common-xen.c
++++ b/arch/x86/kernel/cpu/common-xen.c
+@@ -5,7 +5,6 @@
+ #include <linux/module.h>
+ #include <linux/percpu.h>
+ #include <linux/bootmem.h>
+-#include <asm/semaphore.h>
+ #include <asm/processor.h>
+ #include <asm/i387.h>
+ #include <asm/msr.h>
+@@ -13,6 +12,7 @@
+ #include <asm/mmu_context.h>
+ #include <asm/mtrr.h>
+ #include <asm/mce.h>
++#include <asm/pat.h>
+ #ifdef CONFIG_X86_LOCAL_APIC
+ #include <asm/mpspec.h>
+ #include <asm/apic.h>
+@@ -69,9 +69,9 @@ __u32 cleared_cpu_caps[NCAPINTS] __cpuin
+ static int cachesize_override __cpuinitdata = -1;
+ static int disable_x86_serial_nr __cpuinitdata = 1;
+
+-struct cpu_dev * cpu_devs[X86_VENDOR_NUM] = {};
++struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
+
+-static void __cpuinit default_init(struct cpuinfo_x86 * c)
++static void __cpuinit default_init(struct cpuinfo_x86 *c)
+ {
+ /* Not much we can do here... */
+ /* Check if at least it has cpuid */
+@@ -88,11 +88,11 @@ static struct cpu_dev __cpuinitdata defa
+ .c_init = default_init,
+ .c_vendor = "Unknown",
+ };
+-static struct cpu_dev * this_cpu __cpuinitdata = &default_cpu;
++static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
+
+ static int __init cachesize_setup(char *str)
+ {
+- get_option (&str, &cachesize_override);
++ get_option(&str, &cachesize_override);
+ return 1;
+ }
+ __setup("cachesize=", cachesize_setup);
+@@ -114,12 +114,12 @@ int __cpuinit get_model_name(struct cpui
+ /* Intel chips right-justify this string for some dumb reason;
+ undo that brain damage */
+ p = q = &c->x86_model_id[0];
+- while ( *p == ' ' )
++ while (*p == ' ')
+ p++;
+- if ( p != q ) {
+- while ( *p )
++ if (p != q) {
++ while (*p)
+ *q++ = *p++;
+- while ( q <= &c->x86_model_id[48] )
++ while (q <= &c->x86_model_id[48])
+ *q++ = '\0'; /* Zero-pad the rest */
+ }
+
+@@ -137,7 +137,7 @@ void __cpuinit display_cacheinfo(struct
+ cpuid(0x80000005, &dummy, &dummy, &ecx, &edx);
+ printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
+ edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
+- c->x86_cache_size=(ecx>>24)+(edx>>24);
++ c->x86_cache_size = (ecx>>24)+(edx>>24);
+ }
+
+ if (n < 0x80000006) /* Some chips just has a large L1. */
+@@ -145,16 +145,16 @@ void __cpuinit display_cacheinfo(struct
+
+ ecx = cpuid_ecx(0x80000006);
+ l2size = ecx >> 16;
+-
++
+ /* do processor-specific cache resizing */
+ if (this_cpu->c_size_cache)
+- l2size = this_cpu->c_size_cache(c,l2size);
++ l2size = this_cpu->c_size_cache(c, l2size);
+
+ /* Allow user to override all this if necessary. */
+ if (cachesize_override != -1)
+ l2size = cachesize_override;
+
+- if ( l2size == 0 )
++ if (l2size == 0)
+ return; /* Again, no L2 cache is possible */
+
+ c->x86_cache_size = l2size;
+@@ -163,16 +163,19 @@ void __cpuinit display_cacheinfo(struct
+ l2size, ecx & 0xFF);
+ }
+
+-/* Naming convention should be: <Name> [(<Codename>)] */
+-/* This table only is used unless init_<vendor>() below doesn't set it; */
+-/* in particular, if CPUID levels 0x80000002..4 are supported, this isn't used */
++/*
++ * Naming convention should be: <Name> [(<Codename>)]
++ * This table only is used unless init_<vendor>() below doesn't set it;
++ * in particular, if CPUID levels 0x80000002..4 are supported, this isn't used
++ *
++ */
+
+ /* Look up CPU names by table lookup. */
+ static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c)
+ {
+ struct cpu_model_info *info;
+
+- if ( c->x86_model >= 16 )
++ if (c->x86_model >= 16)
+ return NULL; /* Range check */
+
+ if (!this_cpu)
+@@ -197,9 +200,9 @@ static void __cpuinit get_cpu_vendor(str
+
+ for (i = 0; i < X86_VENDOR_NUM; i++) {
+ if (cpu_devs[i]) {
+- if (!strcmp(v,cpu_devs[i]->c_ident[0]) ||
+- (cpu_devs[i]->c_ident[1] &&
+- !strcmp(v,cpu_devs[i]->c_ident[1]))) {
++ if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
++ (cpu_devs[i]->c_ident[1] &&
++ !strcmp(v, cpu_devs[i]->c_ident[1]))) {
+ c->x86_vendor = i;
+ if (!early)
+ this_cpu = cpu_devs[i];
+@@ -217,7 +220,7 @@ static void __cpuinit get_cpu_vendor(str
+ }
+
+
+-static int __init x86_fxsr_setup(char * s)
++static int __init x86_fxsr_setup(char *s)
+ {
+ setup_clear_cpu_cap(X86_FEATURE_FXSR);
+ setup_clear_cpu_cap(X86_FEATURE_XMM);
+@@ -226,7 +229,7 @@ static int __init x86_fxsr_setup(char *
+ __setup("nofxsr", x86_fxsr_setup);
+
+
+-static int __init x86_sep_setup(char * s)
++static int __init x86_sep_setup(char *s)
+ {
+ setup_clear_cpu_cap(X86_FEATURE_SEP);
+ return 1;
+@@ -315,12 +318,15 @@ static void __cpuinit early_get_cap(stru
+
+ }
+
+-/* Do minimum CPU detection early.
+- Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment.
+- The others are not touched to avoid unwanted side effects.
+-
+- WARNING: this function is only called on the BP. Don't add code here
+- that is supposed to run on all CPUs. */
++/*
++ * Do minimum CPU detection early.
++ * Fields really needed: vendor, cpuid_level, family, model, mask,
++ * cache alignment.
++ * The others are not touched to avoid unwanted side effects.
++ *
++ * WARNING: this function is only called on the BP. Don't add code here
++ * that is supposed to run on all CPUs.
++ */
+ static void __init early_cpu_detect(void)
+ {
+ struct cpuinfo_x86 *c = &boot_cpu_data;
+@@ -335,19 +341,14 @@ static void __init early_cpu_detect(void
+
+ get_cpu_vendor(c, 1);
+
+- switch (c->x86_vendor) {
+- case X86_VENDOR_AMD:
+- early_init_amd(c);
+- break;
+- case X86_VENDOR_INTEL:
+- early_init_intel(c);
+- break;
+- }
++ if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
++ cpu_devs[c->x86_vendor]->c_early_init)
++ cpu_devs[c->x86_vendor]->c_early_init(c);
+
+ early_get_cap(c);
+ }
+
+-static void __cpuinit generic_identify(struct cpuinfo_x86 * c)
++static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
+ {
+ u32 tfms, xlvl;
+ unsigned int ebx;
+@@ -358,13 +359,12 @@ static void __cpuinit generic_identify(s
+ (unsigned int *)&c->x86_vendor_id[0],
+ (unsigned int *)&c->x86_vendor_id[8],
+ (unsigned int *)&c->x86_vendor_id[4]);
+-
++
+ get_cpu_vendor(c, 0);
+ /* Initialize the standard set of capabilities */
+ /* Note that the vendor-specific code below might override */
+-
+ /* Intel-defined flags: level 0x00000001 */
+- if ( c->cpuid_level >= 0x00000001 ) {
++ if (c->cpuid_level >= 0x00000001) {
+ u32 capability, excap;
+ cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
+ c->x86_capability[0] = capability;
+@@ -376,12 +376,14 @@ static void __cpuinit generic_identify(s
+ if (c->x86 >= 0x6)
+ c->x86_model += ((tfms >> 16) & 0xF) << 4;
+ c->x86_mask = tfms & 15;
++ c->initial_apicid = (ebx >> 24) & 0xFF;
+ #ifdef CONFIG_X86_HT
+- c->apicid = phys_pkg_id((ebx >> 24) & 0xFF, 0);
++ c->apicid = phys_pkg_id(c->initial_apicid, 0);
++ c->phys_proc_id = c->initial_apicid;
+ #else
+- c->apicid = (ebx >> 24) & 0xFF;
++ c->apicid = c->initial_apicid;
+ #endif
+- if (c->x86_capability[0] & (1<<19))
++ if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
+ c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
+ } else {
+ /* Have CPUID level 0 only - unheard of */
+@@ -390,33 +392,30 @@ static void __cpuinit generic_identify(s
+
+ /* AMD-defined flags: level 0x80000001 */
+ xlvl = cpuid_eax(0x80000000);
+- if ( (xlvl & 0xffff0000) == 0x80000000 ) {
+- if ( xlvl >= 0x80000001 ) {
++ if ((xlvl & 0xffff0000) == 0x80000000) {
++ if (xlvl >= 0x80000001) {
+ c->x86_capability[1] = cpuid_edx(0x80000001);
+ c->x86_capability[6] = cpuid_ecx(0x80000001);
+ }
+- if ( xlvl >= 0x80000004 )
++ if (xlvl >= 0x80000004)
+ get_model_name(c); /* Default name */
+ }
+
+ init_scattered_cpuid_features(c);
+ }
+
+-#ifdef CONFIG_X86_HT
+- c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
+-#endif
+ }
+
+ static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
+ {
+- if (cpu_has(c, X86_FEATURE_PN) && disable_x86_serial_nr ) {
++ if (cpu_has(c, X86_FEATURE_PN) && disable_x86_serial_nr) {
+ /* Disable processor serial number */
+- unsigned long lo,hi;
+- rdmsr(MSR_IA32_BBL_CR_CTL,lo,hi);
++ unsigned long lo, hi;
++ rdmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
+ lo |= 0x200000;
+- wrmsr(MSR_IA32_BBL_CR_CTL,lo,hi);
++ wrmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
+ printk(KERN_NOTICE "CPU serial number disabled.\n");
+- clear_bit(X86_FEATURE_PN, c->x86_capability);
++ clear_cpu_cap(c, X86_FEATURE_PN);
+
+ /* Disabling the serial number may affect the cpuid level */
+ c->cpuid_level = cpuid_eax(0);
+@@ -451,9 +450,11 @@ void __cpuinit identify_cpu(struct cpuin
+ memset(&c->x86_capability, 0, sizeof c->x86_capability);
+
+ if (!have_cpuid_p()) {
+- /* First of all, decide if this is a 486 or higher */
+- /* It's a 486 if we can modify the AC flag */
+- if ( flag_is_changeable_p(X86_EFLAGS_AC) )
++ /*
++ * First of all, decide if this is a 486 or higher
++ * It's a 486 if we can modify the AC flag
++ */
++ if (flag_is_changeable_p(X86_EFLAGS_AC))
+ c->x86 = 4;
+ else
+ c->x86 = 3;
+@@ -486,10 +487,10 @@ void __cpuinit identify_cpu(struct cpuin
+ */
+
+ /* If the model name is still unset, do table lookup. */
+- if ( !c->x86_model_id[0] ) {
++ if (!c->x86_model_id[0]) {
+ char *p;
+ p = table_lookup_model(c);
+- if ( p )
++ if (p)
+ strcpy(c->x86_model_id, p);
+ else
+ /* Last resort... */
+@@ -503,9 +504,9 @@ void __cpuinit identify_cpu(struct cpuin
+ * common between the CPUs. The first time this routine gets
+ * executed, c == &boot_cpu_data.
+ */
+- if ( c != &boot_cpu_data ) {
++ if (c != &boot_cpu_data) {
+ /* AND the already accumulated flags with these */
+- for ( i = 0 ; i < NCAPINTS ; i++ )
++ for (i = 0 ; i < NCAPINTS ; i++)
+ boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
+ }
+
+@@ -549,7 +550,7 @@ void __cpuinit detect_ht(struct cpuinfo_
+
+ if (smp_num_siblings == 1) {
+ printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
+- } else if (smp_num_siblings > 1 ) {
++ } else if (smp_num_siblings > 1) {
+
+ if (smp_num_siblings > NR_CPUS) {
+ printk(KERN_WARNING "CPU: Unsupported number of the "
+@@ -559,7 +560,7 @@ void __cpuinit detect_ht(struct cpuinfo_
+ }
+
+ index_msb = get_count_order(smp_num_siblings);
+- c->phys_proc_id = phys_pkg_id((ebx >> 24) & 0xFF, index_msb);
++ c->phys_proc_id = phys_pkg_id(c->initial_apicid, index_msb);
+
+ printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
+ c->phys_proc_id);
+@@ -570,7 +571,7 @@ void __cpuinit detect_ht(struct cpuinfo_
+
+ core_bits = get_count_order(c->x86_max_cores);
+
+- c->cpu_core_id = phys_pkg_id((ebx >> 24) & 0xFF, index_msb) &
++ c->cpu_core_id = phys_pkg_id(c->initial_apicid, index_msb) &
+ ((1 << core_bits) - 1);
+
+ if (c->x86_max_cores > 1)
+@@ -604,7 +605,7 @@ void __cpuinit print_cpu_info(struct cpu
+ else
+ printk("%s", c->x86_model_id);
+
+- if (c->x86_mask || c->cpuid_level >= 0)
++ if (c->x86_mask || c->cpuid_level >= 0)
+ printk(" stepping %02x\n", c->x86_mask);
+ else
+ printk("\n");
+@@ -623,24 +624,17 @@ __setup("clearcpuid=", setup_disablecpui
+
+ cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
+
+-/* This is hacky. :)
+- * We're emulating future behavior.
+- * In the future, the cpu-specific init functions will be called implicitly
+- * via the magic of initcalls.
+- * They will insert themselves into the cpu_devs structure.
+- * Then, when cpu_init() is called, we can just iterate over that array.
+- */
+ void __init early_cpu_init(void)
+ {
+- intel_cpu_init();
+- cyrix_init_cpu();
+- nsc_init_cpu();
+- amd_init_cpu();
+- centaur_init_cpu();
+- transmeta_init_cpu();
+- nexgen_init_cpu();
+- umc_init_cpu();
++ struct cpu_vendor_dev *cvdev;
++
++ for (cvdev = __x86cpuvendor_start ;
++ cvdev < __x86cpuvendor_end ;
++ cvdev++)
++ cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
++
+ early_cpu_detect();
++ validate_pat_support(&boot_cpu_data);
+ }
+
+ /* Make sure %fs is initialized properly in idle threads */
+@@ -685,7 +679,7 @@ void __cpuinit cpu_init(void)
+ int cpu = smp_processor_id();
+ struct task_struct *curr = current;
+ #ifndef CONFIG_X86_NO_TSS
+- struct tss_struct * t = &per_cpu(init_tss, cpu);
++ struct tss_struct *t = &per_cpu(init_tss, cpu);
+ #endif
+ struct thread_struct *thread = &curr->thread;
+
+@@ -738,7 +732,7 @@ void __cpuinit cpu_init(void)
+ mxcsr_feature_mask_init();
+ }
+
+-#ifdef CONFIG_HOTPLUG_CPU
++#if defined(CONFIG_HOTPLUG_CPU) && !defined(CONFIG_XEN)
+ void __cpuinit cpu_uninit(void)
+ {
+ int cpu = raw_smp_processor_id();
+--- a/arch/x86/kernel/cpu/mtrr/main-xen.c
++++ b/arch/x86/kernel/cpu/mtrr/main-xen.c
+@@ -35,6 +35,8 @@ struct mtrr_ops *mtrr_if = &generic_mtrr
+ unsigned int num_var_ranges;
+ unsigned int mtrr_usage_table[MAX_VAR_RANGES];
+
++static u64 tom2;
++
+ static void __init set_num_var_ranges(void)
+ {
+ struct xen_platform_op op;
+@@ -162,8 +164,144 @@ mtrr_del(int reg, unsigned long base, un
+ EXPORT_SYMBOL(mtrr_add);
+ EXPORT_SYMBOL(mtrr_del);
+
++/*
++ * Returns the effective MTRR type for the region
++ * Error returns:
++ * - 0xFE - when the range is "not entirely covered" by _any_ var range MTRR
++ * - 0xFF - when MTRR is not enabled
++ */
++u8 mtrr_type_lookup(u64 start, u64 end)
++{
++ int i, error;
++ u64 start_mfn, end_mfn, base_mfn, top_mfn;
++ u8 prev_match, curr_match;
++ struct xen_platform_op op;
++
++ if (!is_initial_xendomain())
++ return MTRR_TYPE_WRBACK;
++
++ if (!num_var_ranges)
++ return 0xFF;
++
++ start_mfn = start >> PAGE_SHIFT;
++ /* Make end inclusive end, instead of exclusive */
++ end_mfn = --end >> PAGE_SHIFT;
++
++ /* Look in fixed ranges. Just return the type as per start */
++ if (start_mfn < 0x100) {
++#if 0//todo
++ op.cmd = XENPF_read_memtype;
++ op.u.read_memtype.reg = ???;
++ error = HYPERVISOR_platform_op(&op);
++ if (!error)
++ return op.u.read_memtype.type;
++#endif
++ return MTRR_TYPE_UNCACHABLE;
++ }
++
++ /*
++ * Look in variable ranges
++ * Look of multiple ranges matching this address and pick type
++ * as per MTRR precedence
++ */
++ prev_match = 0xFF;
++ for (i = 0; i < num_var_ranges; ++i) {
++ op.cmd = XENPF_read_memtype;
++ op.u.read_memtype.reg = i;
++ error = HYPERVISOR_platform_op(&op);
++
++ if (error || !op.u.read_memtype.nr_mfns)
++ continue;
++
++ base_mfn = op.u.read_memtype.mfn;
++ top_mfn = base_mfn + op.u.read_memtype.nr_mfns - 1;
++
++ if (base_mfn > end_mfn || start_mfn > top_mfn) {
++ continue;
++ }
++
++ if (base_mfn > start_mfn || end_mfn > top_mfn) {
++ return 0xFE;
++ }
++
++ curr_match = op.u.read_memtype.type;
++ if (prev_match == 0xFF) {
++ prev_match = curr_match;
++ continue;
++ }
++
++ if (prev_match == MTRR_TYPE_UNCACHABLE ||
++ curr_match == MTRR_TYPE_UNCACHABLE) {
++ return MTRR_TYPE_UNCACHABLE;
++ }
++
++ if ((prev_match == MTRR_TYPE_WRBACK &&
++ curr_match == MTRR_TYPE_WRTHROUGH) ||
++ (prev_match == MTRR_TYPE_WRTHROUGH &&
++ curr_match == MTRR_TYPE_WRBACK)) {
++ prev_match = MTRR_TYPE_WRTHROUGH;
++ curr_match = MTRR_TYPE_WRTHROUGH;
++ }
++
++ if (prev_match != curr_match) {
++ return MTRR_TYPE_UNCACHABLE;
++ }
++ }
++
++ if (tom2) {
++ if (start >= (1ULL<<32) && (end < tom2))
++ return MTRR_TYPE_WRBACK;
++ }
++
++ if (prev_match != 0xFF)
++ return prev_match;
++
++#if 0//todo
++ op.cmd = XENPF_read_def_memtype;
++ error = HYPERVISOR_platform_op(&op);
++ if (!error)
++ return op.u.read_def_memtype.type;
++#endif
++ return MTRR_TYPE_UNCACHABLE;
++}
++
++/*
++ * Newer AMD K8s and later CPUs have a special magic MSR way to force WB
++ * for memory >4GB. Check for that here.
++ * Note this won't check if the MTRRs < 4GB where the magic bit doesn't
++ * apply to are wrong, but so far we don't know of any such case in the wild.
++ */
++#define Tom2Enabled (1U << 21)
++#define Tom2ForceMemTypeWB (1U << 22)
++
++int __init amd_special_default_mtrr(void)
++{
++ u32 l, h;
++
++ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
++ return 0;
++ if (boot_cpu_data.x86 < 0xf || boot_cpu_data.x86 > 0x11)
++ return 0;
++ /* In case some hypervisor doesn't pass SYSCFG through */
++ if (rdmsr_safe(MSR_K8_SYSCFG, &l, &h) < 0)
++ return 0;
++ /*
++ * Memory between 4GB and top of mem is forced WB by this magic bit.
++ * Reserved before K8RevF, but should be zero there.
++ */
++ if ((l & (Tom2Enabled | Tom2ForceMemTypeWB)) ==
++ (Tom2Enabled | Tom2ForceMemTypeWB))
++ return 1;
++ return 0;
++}
++
+ void __init mtrr_bp_init(void)
+ {
++ if (amd_special_default_mtrr()) {
++ /* TOP_MEM2 */
++ rdmsrl(MSR_K8_TOP_MEM2, tom2);
++ tom2 &= 0xffffff8000000ULL;
++ }
+ }
+
+ void mtrr_ap_init(void)
+--- a/arch/x86/kernel/e820_32-xen.c
++++ b/arch/x86/kernel/e820_32-xen.c
+@@ -469,7 +469,7 @@ int __init sanitize_e820_map(struct e820
+ * thinkpad 560x, for example, does not cooperate with the memory
+ * detection code.)
+ */
+-int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
++int __init copy_e820_map(struct e820entry *biosmap, int nr_map)
+ {
+ #ifndef CONFIG_XEN
+ /* Only one memory region (or negative)? Ignore it */
+@@ -480,33 +480,17 @@ int __init copy_e820_map(struct e820entr
+ #endif
+
+ do {
+- unsigned long long start = biosmap->addr;
+- unsigned long long size = biosmap->size;
+- unsigned long long end = start + size;
+- unsigned long type = biosmap->type;
++ u64 start = biosmap->addr;
++ u64 size = biosmap->size;
++ u64 end = start + size;
++ u32 type = biosmap->type;
+
+ /* Overflow in 64 bits? Ignore the memory map. */
+ if (start > end)
+ return -1;
+
+-#ifndef CONFIG_XEN
+- /*
+- * Some BIOSes claim RAM in the 640k - 1M region.
+- * Not right. Fix it up.
+- */
+- if (type == E820_RAM) {
+- if (start < 0x100000ULL && end > 0xA0000ULL) {
+- if (start < 0xA0000ULL)
+- add_memory_region(start, 0xA0000ULL-start, type);
+- if (end <= 0x100000ULL)
+- continue;
+- start = 0x100000ULL;
+- size = end - start;
+- }
+- }
+-#endif
+ add_memory_region(start, size, type);
+- } while (biosmap++,--nr_map);
++ } while (biosmap++, --nr_map);
+
+ #ifdef CONFIG_XEN
+ if (is_initial_xendomain()) {
+@@ -528,7 +512,7 @@ int __init copy_e820_map(struct e820entr
+ /*
+ * Find the highest page frame number we have available
+ */
+-void __init find_max_pfn(void)
++void __init propagate_e820_map(void)
+ {
+ int i;
+
+@@ -814,7 +798,7 @@ static int __init parse_memmap(char *arg
+ * size before original memory map is
+ * reset.
+ */
+- find_max_pfn();
++ propagate_e820_map();
+ saved_max_pfn = max_pfn;
+ #endif
+ e820.nr_map = 0;
+--- a/arch/x86/kernel/e820_64-xen.c
++++ b/arch/x86/kernel/e820_64-xen.c
+@@ -40,11 +40,11 @@ struct e820map machine_e820;
+ unsigned long end_pfn;
+
+ /*
+- * end_pfn only includes RAM, while end_pfn_map includes all e820 entries.
+- * The direct mapping extends to end_pfn_map, so that we can directly access
++ * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
++ * The direct mapping extends to max_pfn_mapped, so that we can directly access
+ * apertures, ACPI and other tables without having to play with fixmaps.
+ */
+-unsigned long end_pfn_map;
++unsigned long max_pfn_mapped;
+
+ /*
+ * Last pfn which the user wants to use.
+@@ -63,8 +63,8 @@ struct early_res {
+ static struct early_res early_res[MAX_EARLY_RES] __initdata = {
+ #ifndef CONFIG_XEN
+ { 0, PAGE_SIZE, "BIOS data page" }, /* BIOS data page */
+-#ifdef CONFIG_SMP
+- { SMP_TRAMPOLINE_BASE, SMP_TRAMPOLINE_BASE + 2*PAGE_SIZE, "SMP_TRAMPOLINE" },
++#ifdef CONFIG_X86_TRAMPOLINE
++ { TRAMPOLINE_BASE, TRAMPOLINE_BASE + 2 * PAGE_SIZE, "TRAMPOLINE" },
+ #endif
+ #endif
+ {}
+@@ -89,19 +89,47 @@ void __init reserve_early(unsigned long
+ strncpy(r->name, name, sizeof(r->name) - 1);
+ }
+
+-void __init early_res_to_bootmem(void)
++void __init free_early(unsigned long start, unsigned long end)
++{
++ struct early_res *r;
++ int i, j;
++
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
++ r = &early_res[i];
++ if (start == r->start && end == r->end)
++ break;
++ }
++ if (i >= MAX_EARLY_RES || !early_res[i].end)
++ panic("free_early on not reserved area: %lx-%lx!", start, end);
++
++ for (j = i + 1; j < MAX_EARLY_RES && early_res[j].end; j++)
++ ;
++
++ memmove(&early_res[i], &early_res[i + 1],
++ (j - 1 - i) * sizeof(struct early_res));
++
++ early_res[j - 1].end = 0;
++}
++
++void __init early_res_to_bootmem(unsigned long start, unsigned long end)
+ {
+ int i;
++ unsigned long final_start, final_end;
+ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+ struct early_res *r = &early_res[i];
+- printk(KERN_INFO "early res: %d [%lx-%lx] %s\n", i,
+- r->start, r->end - 1, r->name);
+- reserve_bootmem_generic(r->start, r->end - r->start);
++ final_start = max(start, r->start);
++ final_end = min(end, r->end);
++ if (final_start >= final_end)
++ continue;
++ printk(KERN_INFO " early res: %d [%lx-%lx] %s\n", i,
++ final_start, final_end - 1, r->name);
++ reserve_bootmem_generic(final_start, final_end - final_start);
+ }
+ }
+
+ /* Check for already reserved areas */
+-static inline int bad_addr(unsigned long *addrp, unsigned long size)
++static inline int __init
++bad_addr(unsigned long *addrp, unsigned long size, unsigned long align)
+ {
+ int i;
+ unsigned long addr = *addrp, last;
+@@ -111,7 +139,7 @@ again:
+ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+ struct early_res *r = &early_res[i];
+ if (last >= r->start && addr < r->end) {
+- *addrp = addr = r->end;
++ *addrp = addr = round_up(r->end, align);
+ changed = 1;
+ goto again;
+ }
+@@ -119,6 +147,40 @@ again:
+ return changed;
+ }
+
++/* Check for already reserved areas */
++static inline int __init
++bad_addr_size(unsigned long *addrp, unsigned long *sizep, unsigned long align)
++{
++ int i;
++ unsigned long addr = *addrp, last;
++ unsigned long size = *sizep;
++ int changed = 0;
++again:
++ last = addr + size;
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
++ struct early_res *r = &early_res[i];
++ if (last > r->start && addr < r->start) {
++ size = r->start - addr;
++ changed = 1;
++ goto again;
++ }
++ if (last > r->end && addr < r->end) {
++ addr = round_up(r->end, align);
++ size = last - addr;
++ changed = 1;
++ goto again;
++ }
++ if (last <= r->end && addr >= r->start) {
++ (*sizep)++;
++ return 0;
++ }
++ }
++ if (changed) {
++ *addrp = addr;
++ *sizep = size;
++ }
++ return changed;
++}
+ /*
+ * This function checks if any part of the range <start,end> is mapped
+ * with type.
+@@ -194,26 +256,27 @@ int __init e820_all_mapped(unsigned long
+ * Find a free area with specified alignment in a specific range.
+ */
+ unsigned long __init find_e820_area(unsigned long start, unsigned long end,
+- unsigned size, unsigned long align)
++ unsigned long size, unsigned long align)
+ {
+ int i;
+- unsigned long mask = ~(align - 1);
+
+ for (i = 0; i < e820.nr_map; i++) {
+ struct e820entry *ei = &e820.map[i];
+- unsigned long addr = ei->addr, last;
++ unsigned long addr, last;
++ unsigned long ei_last;
+
+ if (ei->type != E820_RAM)
+ continue;
++ addr = round_up(ei->addr, align);
++ ei_last = ei->addr + ei->size;
+ if (addr < start)
+- addr = start;
+- if (addr > ei->addr + ei->size)
++ addr = round_up(start, align);
++ if (addr >= ei_last)
+ continue;
+- while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size)
++ while (bad_addr(&addr, size, align) && addr+size <= ei_last)
+ ;
+- addr = (addr + align - 1) & mask;
+ last = addr + size;
+- if (last > ei->addr + ei->size)
++ if (last > ei_last)
+ continue;
+ if (last > end)
+ continue;
+@@ -223,6 +286,40 @@ unsigned long __init find_e820_area(unsi
+ }
+
+ /*
++ * Find next free range after *start
++ */
++unsigned long __init find_e820_area_size(unsigned long start,
++ unsigned long *sizep,
++ unsigned long align)
++{
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ unsigned long addr, last;
++ unsigned long ei_last;
++
++ if (ei->type != E820_RAM)
++ continue;
++ addr = round_up(ei->addr, align);
++ ei_last = ei->addr + ei->size;
++ if (addr < start)
++ addr = round_up(start, align);
++ if (addr >= ei_last)
++ continue;
++ *sizep = ei_last - addr;
++ while (bad_addr_size(&addr, sizep, align) &&
++ addr + *sizep <= ei_last)
++ ;
++ last = addr + *sizep;
++ if (last > ei_last)
++ continue;
++ return addr;
++ }
++ return -1UL;
++
++}
++/*
+ * Find the highest page frame number we have available
+ */
+ unsigned long __init e820_end_of_ram(void)
+@@ -231,31 +328,29 @@ unsigned long __init e820_end_of_ram(voi
+
+ end_pfn = find_max_pfn_with_active_regions();
+
+- if (end_pfn > end_pfn_map)
+- end_pfn_map = end_pfn;
+- if (end_pfn_map > MAXMEM>>PAGE_SHIFT)
+- end_pfn_map = MAXMEM>>PAGE_SHIFT;
++ if (end_pfn > max_pfn_mapped)
++ max_pfn_mapped = end_pfn;
++ if (max_pfn_mapped > MAXMEM>>PAGE_SHIFT)
++ max_pfn_mapped = MAXMEM>>PAGE_SHIFT;
+ if (end_pfn > end_user_pfn)
+ end_pfn = end_user_pfn;
+- if (end_pfn > end_pfn_map)
+- end_pfn = end_pfn_map;
++ if (end_pfn > max_pfn_mapped)
++ end_pfn = max_pfn_mapped;
+
+- printk(KERN_INFO "end_pfn_map = %lu\n", end_pfn_map);
++ printk(KERN_INFO "max_pfn_mapped = %lu\n", max_pfn_mapped);
+ return end_pfn;
+ }
+
+ /*
+ * Mark e820 reserved areas as busy for the resource manager.
+ */
+-void __init e820_reserve_resources(struct e820entry *e820, int nr_map,
+- struct resource *code_resource,
+- struct resource *data_resource,
+- struct resource *bss_resource)
++void __init e820_reserve_resources(struct e820entry *e820, int nr_map)
+ {
+ int i;
++ struct resource *res;
++
++ res = alloc_bootmem_low(sizeof(struct resource) * nr_map);
+ for (i = 0; i < nr_map; i++) {
+- struct resource *res;
+- res = alloc_bootmem_low(sizeof(struct resource));
+ switch (e820[i].type) {
+ case E820_RAM: res->name = "System RAM"; break;
+ case E820_ACPI: res->name = "ACPI Tables"; break;
+@@ -265,26 +360,8 @@ void __init e820_reserve_resources(struc
+ res->start = e820[i].addr;
+ res->end = res->start + e820[i].size - 1;
+ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+- request_resource(&iomem_resource, res);
+- if (e820[i].type == E820_RAM) {
+- /*
+- * We don't know which RAM region contains kernel data,
+- * so we try it repeatedly and let the resource manager
+- * test it.
+- */
+-#ifndef CONFIG_XEN
+- request_resource(res, code_resource);
+- request_resource(res, data_resource);
+- request_resource(res, bss_resource);
+-#endif
+-#ifdef CONFIG_KEXEC
+- if (crashk_res.start != crashk_res.end)
+- request_resource(res, &crashk_res);
+-#ifdef CONFIG_XEN
+- xen_machine_kexec_register_resources(res);
+-#endif
+-#endif
+- }
++ insert_resource(&iomem_resource, res);
++ res++;
+ }
+ }
+
+@@ -338,9 +415,9 @@ static int __init e820_find_active_regio
+ if (*ei_startpfn >= *ei_endpfn)
+ return 0;
+
+- /* Check if end_pfn_map should be updated */
+- if (ei->type != E820_RAM && *ei_endpfn > end_pfn_map)
+- end_pfn_map = *ei_endpfn;
++ /* Check if max_pfn_mapped should be updated */
++ if (ei->type != E820_RAM && *ei_endpfn > max_pfn_mapped)
++ max_pfn_mapped = *ei_endpfn;
+
+ /* Skip if map is outside the node */
+ if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
+@@ -667,10 +744,10 @@ static int __init copy_e820_map(struct e
+ #endif
+
+ do {
+- unsigned long start = biosmap->addr;
+- unsigned long size = biosmap->size;
+- unsigned long end = start + size;
+- unsigned long type = biosmap->type;
++ u64 start = biosmap->addr;
++ u64 size = biosmap->size;
++ u64 end = start + size;
++ u32 type = biosmap->type;
+
+ /* Overflow in 64 bits? Ignore the memory map. */
+ if (start > end)
+@@ -801,7 +878,7 @@ static int __init parse_memmap_opt(char
+ saved_max_pfn = e820_end_of_ram();
+ remove_all_active_ranges();
+ #endif
+- end_pfn_map = 0;
++ max_pfn_mapped = 0;
+ e820.nr_map = 0;
+ userdef = 1;
+ return 0;
+--- a/arch/x86/kernel/early_printk-xen.c
++++ b/arch/x86/kernel/early_printk-xen.c
+@@ -13,7 +13,7 @@
+
+ #ifndef CONFIG_XEN
+ static int max_ypos = 25, max_xpos = 80;
+-static int current_ypos = 25, current_xpos = 0;
++static int current_ypos = 25, current_xpos;
+
+ static void early_vga_write(struct console *con, const char *str, unsigned n)
+ {
+@@ -108,12 +108,12 @@ static __init void early_serial_init(cha
+
+ if (*s) {
+ unsigned port;
+- if (!strncmp(s,"0x",2)) {
++ if (!strncmp(s, "0x", 2)) {
+ early_serial_base = simple_strtoul(s, &e, 16);
+ } else {
+ static int bases[] = { 0x3f8, 0x2f8 };
+
+- if (!strncmp(s,"ttyS",4))
++ if (!strncmp(s, "ttyS", 4))
+ s += 4;
+ port = simple_strtoul(s, &e, 10);
+ if (port > 1 || s == e)
+@@ -223,7 +223,7 @@ static struct console simnow_console = {
+
+ /* Direct interface for emergencies */
+ static struct console *early_console = &early_vga_console;
+-static int early_console_initialized = 0;
++static int early_console_initialized;
+
+ void early_printk(const char *fmt, ...)
+ {
+@@ -231,9 +231,9 @@ void early_printk(const char *fmt, ...)
+ int n;
+ va_list ap;
+
+- va_start(ap,fmt);
+- n = vscnprintf(buf,512,fmt,ap);
+- early_console->write(early_console,buf,n);
++ va_start(ap, fmt);
++ n = vscnprintf(buf, 512, fmt, ap);
++ early_console->write(early_console, buf, n);
+ va_end(ap);
+ }
+
+@@ -259,16 +259,16 @@ static int __init setup_early_printk(cha
+ early_console = &early_serial_console;
+ } else if (!strncmp(buf, "vga", 3)) {
+ #ifndef CONFIG_XEN
+- && boot_params.screen_info.orig_video_isVGA == 1) {
++ && boot_params.screen_info.orig_video_isVGA == 1) {
+ max_xpos = boot_params.screen_info.orig_video_cols;
+ max_ypos = boot_params.screen_info.orig_video_lines;
+ current_ypos = boot_params.screen_info.orig_y;
+ #endif
+ early_console = &early_vga_console;
+- } else if (!strncmp(buf, "simnow", 6)) {
+- simnow_init(buf + 6);
+- early_console = &simnow_console;
+- keep_early = 1;
++ } else if (!strncmp(buf, "simnow", 6)) {
++ simnow_init(buf + 6);
++ early_console = &simnow_console;
++ keep_early = 1;
+ #ifdef CONFIG_XEN
+ } else if (!strncmp(buf, "xen", 3)) {
+ early_console = &xenboot_console;
+--- a/arch/x86/kernel/entry_32-xen.S
++++ b/arch/x86/kernel/entry_32-xen.S
+@@ -1,5 +1,4 @@
+ /*
+- * linux/arch/i386/entry.S
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+@@ -51,6 +50,7 @@
+ #include <asm/desc.h>
+ #include <asm/percpu.h>
+ #include <asm/dwarf2.h>
++#include <asm/processor-flags.h>
+ #include "irq_vectors.h"
+ #include <xen/interface/xen.h>
+
+@@ -69,12 +69,6 @@
+
+ #define nr_syscalls ((syscall_table_size)/4)
+
+-CF_MASK = 0x00000001
+-TF_MASK = 0x00000100
+-IF_MASK = 0x00000200
+-DF_MASK = 0x00000400
+-NT_MASK = 0x00004000
+-VM_MASK = 0x00020000
+ /* Pseudo-eflags. */
+ NMI_MASK = 0x80000000
+
+@@ -87,7 +81,7 @@ NMI_MASK = 0x80000000
+
+ .macro TRACE_IRQS_IRET
+ #ifdef CONFIG_TRACE_IRQFLAGS
+- testl $IF_MASK,PT_EFLAGS(%esp) # interrupts off?
++ testl $X86_EFLAGS_IF,PT_EFLAGS(%esp) # interrupts off?
+ jz 1f
+ TRACE_IRQS_ON
+ 1:
+@@ -249,7 +243,7 @@ ret_from_intr:
+ check_userspace:
+ movl PT_EFLAGS(%esp), %eax # mix EFLAGS and CS
+ movb PT_CS(%esp), %al
+- andl $(VM_MASK | SEGMENT_RPL_MASK), %eax
++ andl $(X86_EFLAGS_VM | SEGMENT_RPL_MASK), %eax
+ cmpl $USER_RPL, %eax
+ jb resume_kernel # not returning to v8086 or userspace
+
+@@ -258,6 +252,7 @@ ENTRY(resume_userspace)
+ DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt
+ # setting need_resched or sigpending
+ # between sampling and the iret
++ TRACE_IRQS_OFF
+ movl TI_flags(%ebp), %ecx
+ andl $_TIF_WORK_MASK, %ecx # is there any work to be done on
+ # int/exception return?
+@@ -274,7 +269,7 @@ need_resched:
+ movl TI_flags(%ebp), %ecx # need_resched set ?
+ testb $_TIF_NEED_RESCHED, %cl
+ jz restore_all
+- testl $IF_MASK,PT_EFLAGS(%esp) # interrupts off (exception path) ?
++ testl $X86_EFLAGS_IF,PT_EFLAGS(%esp) # interrupts off (exception path) ?
+ jz restore_all
+ call preempt_schedule_irq
+ jmp need_resched
+@@ -299,10 +294,10 @@ ENTRY(ia32_sysenter_target)
+ movl SYSENTER_stack_sp0(%esp),%esp
+ sysenter_past_esp:
+ /*
+- * No need to follow this irqs on/off section: the syscall
+- * disabled irqs and here we enable it straight after entry:
++ * Interrupts are disabled here, but we can't trace it until
++ * enough kernel state to call TRACE_IRQS_OFF can be called - but
++ * we immediately enable interrupts at that point anyway.
+ */
+- ENABLE_INTERRUPTS(CLBR_NONE)
+ pushl $(__USER_DS)
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET ss, 0*/
+@@ -310,6 +305,7 @@ sysenter_past_esp:
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET esp, 0
+ pushfl
++ orl $X86_EFLAGS_IF, (%esp)
+ CFI_ADJUST_CFA_OFFSET 4
+ pushl $(__USER_CS)
+ CFI_ADJUST_CFA_OFFSET 4
+@@ -323,6 +319,11 @@ sysenter_past_esp:
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET eip, 0
+
++ pushl %eax
++ CFI_ADJUST_CFA_OFFSET 4
++ SAVE_ALL
++ ENABLE_INTERRUPTS(CLBR_NONE)
++
+ /*
+ * Load the potential sixth argument from user stack.
+ * Careful about security.
+@@ -330,14 +331,12 @@ sysenter_past_esp:
+ cmpl $__PAGE_OFFSET-3,%ebp
+ jae syscall_fault
+ 1: movl (%ebp),%ebp
++ movl %ebp,PT_EBP(%esp)
+ .section __ex_table,"a"
+ .align 4
+ .long 1b,syscall_fault
+ .previous
+
+- pushl %eax
+- CFI_ADJUST_CFA_OFFSET 4
+- SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+ test_tif %ebp
+ jnz syscall_trace_entry
+@@ -414,7 +413,7 @@ syscall_exit:
+ # setting need_resched or sigpending
+ # between sampling and the iret
+ TRACE_IRQS_OFF
+- testl $TF_MASK,PT_EFLAGS(%esp) # If tracing set singlestep flag on exit
++ testl $X86_EFLAGS_TF,PT_EFLAGS(%esp) # If tracing set singlestep flag on exit
+ jz no_singlestep
+ orl $_TIF_SINGLESTEP,TI_flags(%ebp)
+ no_singlestep:
+@@ -430,7 +429,7 @@ restore_all:
+ # See comments in process.c:copy_thread() for details.
+ movb PT_OLDSS(%esp), %ah
+ movb PT_CS(%esp), %al
+- andl $(VM_MASK | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax
++ andl $(X86_EFLAGS_VM | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax
+ cmpl $((SEGMENT_LDT << 8) | USER_RPL), %eax
+ CFI_REMEMBER_STATE
+ je ldt_ss # returning to user-space with LDT SS
+@@ -438,7 +437,7 @@ restore_nocheck:
+ #else
+ restore_nocheck:
+ movl PT_EFLAGS(%esp), %eax
+- testl $(VM_MASK|NMI_MASK), %eax
++ testl $(X86_EFLAGS_VM|NMI_MASK), %eax
+ CFI_REMEMBER_STATE
+ jnz hypervisor_iret
+ shr $9, %eax # EAX[0] == IRET_EFLAGS.IF
+@@ -456,7 +455,7 @@ restore_nocheck_notrace:
+ irq_return:
+ INTERRUPT_RETURN
+ .section .fixup,"ax"
+-iret_exc:
++ENTRY(iret_exc)
+ pushl $0 # no error code
+ pushl $do_iret_error
+ jmp error_code
+@@ -560,7 +559,7 @@ work_resched:
+ work_notifysig: # deal with pending signals and
+ # notify-resume requests
+ #ifdef CONFIG_VM86
+- testl $VM_MASK, PT_EFLAGS(%esp)
++ testl $X86_EFLAGS_VM, PT_EFLAGS(%esp)
+ movl %esp, %eax
+ jne work_notifysig_v86 # returning to kernel-space or
+ # vm86-space
+@@ -617,9 +616,6 @@ END(syscall_exit_work)
+
+ RING0_INT_FRAME # can't unwind into user space anyway
+ syscall_fault:
+- pushl %eax # save orig_eax
+- CFI_ADJUST_CFA_OFFSET 4
+- SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+ movl $-EFAULT,PT_EAX(%esp)
+ jmp resume_userspace
+--- a/arch/x86/kernel/entry_64-xen.S
++++ b/arch/x86/kernel/entry_64-xen.S
+@@ -338,19 +338,17 @@ badsys:
+ /* Do syscall tracing */
+ tracesys:
+ SAVE_REST
+- movq $-ENOSYS,RAX(%rsp)
++ movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
+ FIXUP_TOP_OF_STACK %rdi
+ movq %rsp,%rdi
+ call syscall_trace_enter
+ LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
+ RESTORE_REST
+ cmpq $__NR_syscall_max,%rax
+- movq $-ENOSYS,%rcx
+- cmova %rcx,%rax
+- ja 1f
++ ja int_ret_from_sys_call /* RAX(%rsp) set to -ENOSYS above */
+ movq %r10,%rcx /* fixup for C */
+ call *sys_call_table(,%rax,8)
+-1: movq %rax,RAX-ARGOFFSET(%rsp)
++ movq %rax,RAX-ARGOFFSET(%rsp)
+ /* Use IRET because user could have changed frame */
+
+ /*
+--- a/arch/x86/kernel/genapic_64-xen.c
++++ b/arch/x86/kernel/genapic_64-xen.c
+@@ -15,6 +15,7 @@
+ #include <linux/kernel.h>
+ #include <linux/ctype.h>
+ #include <linux/init.h>
++#include <linux/hardirq.h>
+
+ #include <asm/smp.h>
+ #include <asm/ipi.h>
+@@ -24,17 +25,12 @@
+ #include <acpi/acpi_bus.h>
+ #endif
+
+-/* which logical CPU number maps to which CPU (physical APIC ID) */
+ #ifndef CONFIG_XEN
+-u16 x86_cpu_to_apicid_init[NR_CPUS] __initdata
+- = { [0 ... NR_CPUS-1] = BAD_APICID };
+-void *x86_cpu_to_apicid_early_ptr;
+-#endif
+-DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID;
+-EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
++DEFINE_PER_CPU(int, x2apic_extra_bits);
+
+-#ifndef CONFIG_XEN
+ struct genapic __read_mostly *genapic = &apic_flat;
++
++static enum uv_system_type uv_system_type;
+ #else
+ extern struct genapic apic_xen;
+ struct genapic __read_mostly *genapic = &apic_xen;
+@@ -47,6 +43,9 @@ struct genapic __read_mostly *genapic =
+ void __init setup_apic_routing(void)
+ {
+ #ifndef CONFIG_XEN
++ if (uv_system_type == UV_NON_UNIQUE_APIC)
++ genapic = &apic_x2apic_uv_x;
++ else
+ #ifdef CONFIG_ACPI
+ /*
+ * Quirk: some x86_64 machines can only use physical APIC mode
+@@ -59,7 +58,7 @@ void __init setup_apic_routing(void)
+ else
+ #endif
+
+- if (cpus_weight(cpu_possible_map) <= 8)
++ if (num_possible_cpus() <= 8)
+ genapic = &apic_flat;
+ else
+ genapic = &apic_physflat;
+@@ -85,3 +84,41 @@ void send_IPI_self(int vector)
+ xen_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
+ #endif
+ }
++
++int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
++{
++#ifndef CONFIG_XEN
++ if (!strcmp(oem_id, "SGI")) {
++ if (!strcmp(oem_table_id, "UVL"))
++ uv_system_type = UV_LEGACY_APIC;
++ else if (!strcmp(oem_table_id, "UVX"))
++ uv_system_type = UV_X2APIC;
++ else if (!strcmp(oem_table_id, "UVH"))
++ uv_system_type = UV_NON_UNIQUE_APIC;
++ }
++#endif
++ return 0;
++}
++
++#ifndef CONFIG_XEN
++unsigned int read_apic_id(void)
++{
++ unsigned int id;
++
++ WARN_ON(preemptible() && num_online_cpus() > 1);
++ id = apic_read(APIC_ID);
++ if (uv_system_type >= UV_X2APIC)
++ id |= __get_cpu_var(x2apic_extra_bits);
++ return id;
++}
++
++enum uv_system_type get_uv_system_type(void)
++{
++ return uv_system_type;
++}
++
++int is_uv_system(void)
++{
++ return uv_system_type != UV_NONE;
++}
++#endif
+--- a/arch/x86/kernel/genapic_xen_64.c
++++ b/arch/x86/kernel/genapic_xen_64.c
+@@ -72,9 +72,7 @@ static cpumask_t xen_target_cpus(void)
+
+ static cpumask_t xen_vector_allocation_domain(int cpu)
+ {
+- cpumask_t domain = CPU_MASK_NONE;
+- cpu_set(cpu, domain);
+- return domain;
++ return cpumask_of_cpu(cpu);
+ }
+
+ /*
+--- a/arch/x86/kernel/head_32-xen.S
++++ b/arch/x86/kernel/head_32-xen.S
+@@ -69,7 +69,7 @@ ENTRY(startup_32)
+ cld # gcc2 wants the direction flag cleared at all times
+
+ pushl $0 # fake return address for unwinder
+- jmp start_kernel
++ jmp i386_start_kernel
+
+ #define HYPERCALL_PAGE_OFFSET 0x1000
+ .org HYPERCALL_PAGE_OFFSET
+--- a/arch/x86/kernel/head64-xen.c
++++ b/arch/x86/kernel/head64-xen.c
+@@ -17,6 +17,7 @@
+ #include <linux/string.h>
+ #include <linux/percpu.h>
+ #include <linux/start_kernel.h>
++#include <linux/io.h>
+ #include <linux/module.h>
+
+ #include <asm/processor.h>
+@@ -29,6 +30,7 @@
+ #include <asm/sections.h>
+ #include <asm/kdebug.h>
+ #include <asm/e820.h>
++#include <asm/bios_ebda.h>
+
+ unsigned long start_pfn;
+
+@@ -75,34 +77,75 @@ EXPORT_SYMBOL(machine_to_phys_mapping);
+ unsigned int machine_to_phys_order;
+ EXPORT_SYMBOL(machine_to_phys_order);
+
+-#define EBDA_ADDR_POINTER 0x40E
++#define BIOS_LOWMEM_KILOBYTES 0x413
+
+-static __init void reserve_ebda(void)
++/*
++ * The BIOS places the EBDA/XBDA at the top of conventional
++ * memory, and usually decreases the reported amount of
++ * conventional memory (int 0x12) too. This also contains a
++ * workaround for Dell systems that neglect to reserve EBDA.
++ * The same workaround also avoids a problem with the AMD768MPX
++ * chipset: reserve a page before VGA to prevent PCI prefetch
++ * into it (errata #56). Usually the page is reserved anyways,
++ * unless you have no PS/2 mouse plugged in.
++ */
++static void __init reserve_ebda_region(void)
+ {
+ #ifndef CONFIG_XEN
+- unsigned ebda_addr, ebda_size;
++ unsigned int lowmem, ebda_addr;
+
+- /*
+- * there is a real-mode segmented pointer pointing to the
+- * 4K EBDA area at 0x40E
+- */
+- ebda_addr = *(unsigned short *)__va(EBDA_ADDR_POINTER);
+- ebda_addr <<= 4;
+-
+- if (!ebda_addr)
++ /* To determine the position of the EBDA and the */
++ /* end of conventional memory, we need to look at */
++ /* the BIOS data area. In a paravirtual environment */
++ /* that area is absent. We'll just have to assume */
++ /* that the paravirt case can handle memory setup */
++ /* correctly, without our help. */
++ if (paravirt_enabled())
+ return;
+
+- ebda_size = *(unsigned short *)__va(ebda_addr);
++ /* end of low (conventional) memory */
++ lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES);
++ lowmem <<= 10;
++
++ /* start of EBDA area */
++ ebda_addr = get_bios_ebda();
++
++ /* Fixup: bios puts an EBDA in the top 64K segment */
++ /* of conventional memory, but does not adjust lowmem. */
++ if ((lowmem - ebda_addr) <= 0x10000)
++ lowmem = ebda_addr;
++
++ /* Fixup: bios does not report an EBDA at all. */
++ /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */
++ if ((ebda_addr == 0) && (lowmem >= 0x9f000))
++ lowmem = 0x9f000;
++
++ /* Paranoia: should never happen, but... */
++ if ((lowmem == 0) || (lowmem >= 0x100000))
++ lowmem = 0x9f000;
+
+- /* Round EBDA up to pages */
+- if (ebda_size == 0)
+- ebda_size = 1;
+- ebda_size <<= 10;
+- ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
+- if (ebda_size > 64*1024)
+- ebda_size = 64*1024;
++ /* reserve all memory between lowmem and the 1MB mark */
++ reserve_early(lowmem, 0x100000, "BIOS reserved");
++#endif
++}
+
+- reserve_early(ebda_addr, ebda_addr + ebda_size, "EBDA");
++static void __init reserve_setup_data(void)
++{
++#ifndef CONFIG_XEN
++ struct setup_data *data;
++ unsigned long pa_data;
++ char buf[32];
++
++ if (boot_params.hdr.version < 0x0209)
++ return;
++ pa_data = boot_params.hdr.setup_data;
++ while (pa_data) {
++ data = early_ioremap(pa_data, sizeof(*data));
++ sprintf(buf, "setup data %x", data->type);
++ reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
++ pa_data = data->next;
++ early_iounmap(data, sizeof(*data));
++ }
+ #endif
+ }
+
+@@ -112,6 +155,19 @@ void __init x86_64_start_kernel(char * r
+ unsigned long machine_to_phys_nr_ents;
+ int i;
+
++ /*
++ * Build-time sanity checks on the kernel image and module
++ * area mappings. (these are purely build-time and produce no code)
++ */
++ BUILD_BUG_ON(MODULES_VADDR < KERNEL_IMAGE_START);
++ BUILD_BUG_ON(MODULES_VADDR-KERNEL_IMAGE_START < KERNEL_IMAGE_SIZE);
++ BUILD_BUG_ON(MODULES_LEN + KERNEL_IMAGE_SIZE > 2*PUD_SIZE);
++ BUILD_BUG_ON((KERNEL_IMAGE_START & ~PMD_MASK) != 0);
++ BUILD_BUG_ON((MODULES_VADDR & ~PMD_MASK) != 0);
++ BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL));
++ BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
++ (__START_KERNEL & PGDIR_MASK)));
++
+ xen_setup_features();
+
+ xen_start_info = (struct start_info *)real_mode_data;
+@@ -140,7 +196,7 @@ void __init x86_64_start_kernel(char * r
+ /* Cleanup the over mapped high alias */
+ cleanup_highmap();
+
+- for (i = 0; i < IDT_ENTRIES; i++) {
++ for (i = 0; i < NUM_EXCEPTION_VECTORS; i++) {
+ #ifdef CONFIG_EARLY_PRINTK
+ set_intr_gate(i, &early_idt_handlers[i]);
+ #else
+@@ -163,7 +219,8 @@ void __init x86_64_start_kernel(char * r
+ reserve_early(round_up(__pa_symbol(&_end), PAGE_SIZE),
+ start_pfn << PAGE_SHIFT, "Xen provided");
+
+- reserve_ebda();
++ reserve_ebda_region();
++ reserve_setup_data();
+
+ /*
+ * At this point everything still needed from the boot loader
+--- a/arch/x86/kernel/init_task-xen.c
++++ b/arch/x86/kernel/init_task-xen.c
+@@ -11,7 +11,6 @@
+ #include <asm/desc.h>
+
+ static struct fs_struct init_fs = INIT_FS;
+-static struct files_struct init_files = INIT_FILES;
+ static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+ static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+ #ifdef CONFIG_X86_XEN
+--- a/arch/x86/kernel/io_apic_32-xen.c
++++ b/arch/x86/kernel/io_apic_32-xen.c
+@@ -88,6 +88,16 @@ int sis_apic_bug = -1;
+ */
+ int nr_ioapic_registers[MAX_IO_APICS];
+
++/* I/O APIC entries */
++struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
++int nr_ioapics;
++
++/* MP IRQ source entries */
++struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
++
++/* # of MP IRQ source entries */
++int mp_irq_entries;
++
+ static int disable_timer_pin_1 __initdata;
+
+ /*
+@@ -863,10 +873,7 @@ static int __init find_isa_irq_pin(int i
+ for (i = 0; i < mp_irq_entries; i++) {
+ int lbus = mp_irqs[i].mpc_srcbus;
+
+- if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_MCA
+- ) &&
++ if (test_bit(lbus, mp_bus_not_pci) &&
+ (mp_irqs[i].mpc_irqtype == type) &&
+ (mp_irqs[i].mpc_srcbusirq == irq))
+
+@@ -882,10 +889,7 @@ static int __init find_isa_irq_apic(int
+ for (i = 0; i < mp_irq_entries; i++) {
+ int lbus = mp_irqs[i].mpc_srcbus;
+
+- if ((mp_bus_id_to_type[lbus] == MP_BUS_ISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_EISA ||
+- mp_bus_id_to_type[lbus] == MP_BUS_MCA
+- ) &&
++ if (test_bit(lbus, mp_bus_not_pci) &&
+ (mp_irqs[i].mpc_irqtype == type) &&
+ (mp_irqs[i].mpc_srcbusirq == irq))
+ break;
+@@ -926,7 +930,7 @@ int IO_APIC_get_PCI_irq_vector(int bus,
+ mp_irqs[i].mpc_dstapic == MP_APIC_ALL)
+ break;
+
+- if ((mp_bus_id_to_type[lbus] == MP_BUS_PCI) &&
++ if (!test_bit(lbus, mp_bus_not_pci) &&
+ !mp_irqs[i].mpc_irqtype &&
+ (bus == lbus) &&
+ (slot == ((mp_irqs[i].mpc_srcbusirq >> 2) & 0x1f))) {
+@@ -977,6 +981,7 @@ void __init setup_ioapic_dest(void)
+ #endif /* !CONFIG_XEN */
+ #endif
+
++#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+ /*
+ * EISA Edge/Level control register, ELCR
+ */
+@@ -990,6 +995,13 @@ static int EISA_ELCR(unsigned int irq)
+ "Broken MPtable reports ISA irq %d\n", irq);
+ return 0;
+ }
++#endif
++
++/* ISA interrupts are always polarity zero edge triggered,
++ * when listed as conforming in the MP table. */
++
++#define default_ISA_trigger(idx) (0)
++#define default_ISA_polarity(idx) (0)
+
+ /* EISA interrupts are always polarity zero and can be edge or level
+ * trigger depending on the ELCR value. If an interrupt is listed as
+@@ -997,13 +1009,7 @@ static int EISA_ELCR(unsigned int irq)
+ * be read in from the ELCR */
+
+ #define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mpc_srcbusirq))
+-#define default_EISA_polarity(idx) (0)
+-
+-/* ISA interrupts are always polarity zero edge triggered,
+- * when listed as conforming in the MP table. */
+-
+-#define default_ISA_trigger(idx) (0)
+-#define default_ISA_polarity(idx) (0)
++#define default_EISA_polarity(idx) default_ISA_polarity(idx)
+
+ /* PCI interrupts are always polarity one level triggered,
+ * when listed as conforming in the MP table. */
+@@ -1015,7 +1021,7 @@ static int EISA_ELCR(unsigned int irq)
+ * when listed as conforming in the MP table. */
+
+ #define default_MCA_trigger(idx) (1)
+-#define default_MCA_polarity(idx) (0)
++#define default_MCA_polarity(idx) default_ISA_polarity(idx)
+
+ static int MPBIOS_polarity(int idx)
+ {
+@@ -1029,35 +1035,9 @@ static int MPBIOS_polarity(int idx)
+ {
+ case 0: /* conforms, ie. bus-type dependent polarity */
+ {
+- switch (mp_bus_id_to_type[bus])
+- {
+- case MP_BUS_ISA: /* ISA pin */
+- {
+- polarity = default_ISA_polarity(idx);
+- break;
+- }
+- case MP_BUS_EISA: /* EISA pin */
+- {
+- polarity = default_EISA_polarity(idx);
+- break;
+- }
+- case MP_BUS_PCI: /* PCI pin */
+- {
+- polarity = default_PCI_polarity(idx);
+- break;
+- }
+- case MP_BUS_MCA: /* MCA pin */
+- {
+- polarity = default_MCA_polarity(idx);
+- break;
+- }
+- default:
+- {
+- printk(KERN_WARNING "broken BIOS!!\n");
+- polarity = 1;
+- break;
+- }
+- }
++ polarity = test_bit(bus, mp_bus_not_pci)?
++ default_ISA_polarity(idx):
++ default_PCI_polarity(idx);
+ break;
+ }
+ case 1: /* high active */
+@@ -1098,11 +1078,15 @@ static int MPBIOS_trigger(int idx)
+ {
+ case 0: /* conforms, ie. bus-type dependent */
+ {
++ trigger = test_bit(bus, mp_bus_not_pci)?
++ default_ISA_trigger(idx):
++ default_PCI_trigger(idx);
++#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+ switch (mp_bus_id_to_type[bus])
+ {
+ case MP_BUS_ISA: /* ISA pin */
+ {
+- trigger = default_ISA_trigger(idx);
++ /* set before the switch */
+ break;
+ }
+ case MP_BUS_EISA: /* EISA pin */
+@@ -1112,7 +1096,7 @@ static int MPBIOS_trigger(int idx)
+ }
+ case MP_BUS_PCI: /* PCI pin */
+ {
+- trigger = default_PCI_trigger(idx);
++ /* set before the switch */
+ break;
+ }
+ case MP_BUS_MCA: /* MCA pin */
+@@ -1127,6 +1111,7 @@ static int MPBIOS_trigger(int idx)
+ break;
+ }
+ }
++#endif
+ break;
+ }
+ case 1: /* edge */
+@@ -1176,39 +1161,22 @@ static int pin_2_irq(int idx, int apic,
+ if (mp_irqs[idx].mpc_dstirq != pin)
+ printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n");
+
+- switch (mp_bus_id_to_type[bus])
+- {
+- case MP_BUS_ISA: /* ISA pin */
+- case MP_BUS_EISA:
+- case MP_BUS_MCA:
+- {
+- irq = mp_irqs[idx].mpc_srcbusirq;
+- break;
+- }
+- case MP_BUS_PCI: /* PCI pin */
+- {
+- /*
+- * PCI IRQs are mapped in order
+- */
+- i = irq = 0;
+- while (i < apic)
+- irq += nr_ioapic_registers[i++];
+- irq += pin;
+-
+- /*
+- * For MPS mode, so far only needed by ES7000 platform
+- */
+- if (ioapic_renumber_irq)
+- irq = ioapic_renumber_irq(apic, irq);
++ if (test_bit(bus, mp_bus_not_pci))
++ irq = mp_irqs[idx].mpc_srcbusirq;
++ else {
++ /*
++ * PCI IRQs are mapped in order
++ */
++ i = irq = 0;
++ while (i < apic)
++ irq += nr_ioapic_registers[i++];
++ irq += pin;
+
+- break;
+- }
+- default:
+- {
+- printk(KERN_ERR "unknown bus type %d.\n",bus);
+- irq = 0;
+- break;
+- }
++ /*
++ * For MPS mode, so far only needed by ES7000 platform
++ */
++ if (ioapic_renumber_irq)
++ irq = ioapic_renumber_irq(apic, irq);
+ }
+
+ /*
+@@ -1314,7 +1282,6 @@ static void __init setup_IO_APIC_irqs(vo
+ {
+ struct IO_APIC_route_entry entry;
+ int apic, pin, idx, irq, first_notcon = 1, vector;
+- unsigned long flags;
+
+ apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
+
+@@ -1380,9 +1347,7 @@ static void __init setup_IO_APIC_irqs(vo
+ if (!apic && (irq < 16))
+ disable_8259A_irq(irq);
+ }
+- spin_lock_irqsave(&ioapic_lock, flags);
+- __ioapic_write_entry(apic, pin, entry);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(apic, pin, entry);
+ }
+ }
+
+@@ -1577,8 +1542,8 @@ void /*__init*/ print_local_APIC(void *
+
+ printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
+ smp_processor_id(), hard_smp_processor_id());
+- v = apic_read(APIC_ID);
+- printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, GET_APIC_ID(v));
++ printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v,
++ GET_APIC_ID(read_apic_id()));
+ v = apic_read(APIC_LVR);
+ printk(KERN_INFO "... APIC VERSION: %08x\n", v);
+ ver = GET_APIC_VERSION(v);
+@@ -1791,7 +1756,7 @@ void disable_IO_APIC(void)
+ entry.delivery_mode = dest_ExtINT; /* ExtInt */
+ entry.vector = 0;
+ entry.dest.physical.physical_dest =
+- GET_APIC_ID(apic_read(APIC_ID));
++ GET_APIC_ID(read_apic_id());
+
+ /*
+ * Add it to the IO-APIC irq-routing table:
+@@ -2090,8 +2055,7 @@ static inline void init_IO_APIC_traps(vo
+ * 0x80, because int 0x80 is hm, kind of importantish. ;)
+ */
+ for (irq = 0; irq < NR_IRQS ; irq++) {
+- int tmp = irq;
+- if (IO_APIC_IRQ(tmp) && !irq_vector[tmp]) {
++ if (IO_APIC_IRQ(irq) && !irq_vector[irq]) {
+ /*
+ * Hmm.. We don't have an entry for this,
+ * so default to an old-fashioned 8259
+@@ -2166,7 +2130,7 @@ static void __init setup_nmi(void)
+ * cycles as some i82489DX-based boards have glue logic that keeps the
+ * 8259A interrupt line asserted until INTA. --macro
+ */
+-static inline void unlock_ExtINT_logic(void)
++static inline void __init unlock_ExtINT_logic(void)
+ {
+ int apic, pin, i;
+ struct IO_APIC_route_entry entry0, entry1;
+@@ -2218,8 +2182,6 @@ static inline void unlock_ExtINT_logic(v
+ ioapic_write_entry(apic, pin, entry0);
+ }
+
+-int timer_uses_ioapic_pin_0;
+-
+ /*
+ * This code may look a bit paranoid, but it's supposed to cooperate with
+ * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ
+@@ -2259,9 +2221,6 @@ static inline void __init check_timer(vo
+ pin2 = ioapic_i8259.pin;
+ apic2 = ioapic_i8259.apic;
+
+- if (pin1 == 0)
+- timer_uses_ioapic_pin_0 = 1;
+-
+ printk(KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
+ vector, apic1, pin1, apic2, pin2);
+
+@@ -2555,6 +2514,7 @@ void destroy_irq(unsigned int irq)
+ dynamic_irq_cleanup(irq);
+
+ spin_lock_irqsave(&vector_lock, flags);
++ clear_bit(irq_vector[irq], used_vectors);
+ irq_vector[irq] = 0;
+ spin_unlock_irqrestore(&vector_lock, flags);
+ }
+@@ -2871,7 +2831,6 @@ int __init io_apic_get_redir_entries (in
+ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low)
+ {
+ struct IO_APIC_route_entry entry;
+- unsigned long flags;
+
+ if (!IO_APIC_IRQ(irq)) {
+ printk(KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
+@@ -2912,9 +2871,7 @@ int io_apic_set_pci_routing (int ioapic,
+ if (!ioapic && (irq < 16))
+ disable_8259A_irq(irq);
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- __ioapic_write_entry(ioapic, pin, entry);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(ioapic, pin, entry);
+
+ return 0;
+ }
+--- a/arch/x86/kernel/io_apic_64-xen.c
++++ b/arch/x86/kernel/io_apic_64-xen.c
+@@ -43,13 +43,15 @@
+ #include <asm/smp.h>
+ #include <asm/desc.h>
+ #include <asm/proto.h>
+-#include <asm/mach_apic.h>
+ #include <asm/acpi.h>
+ #include <asm/dma.h>
+ #include <asm/nmi.h>
+ #include <asm/msidef.h>
+ #include <asm/hypertransport.h>
+
++#include <mach_ipi.h>
++#include <mach_apic.h>
++
+ struct irq_cfg {
+ #ifndef CONFIG_XEN
+ cpumask_t domain;
+@@ -101,6 +103,16 @@ DEFINE_SPINLOCK(vector_lock);
+ */
+ int nr_ioapic_registers[MAX_IO_APICS];
+
++/* I/O APIC entries */
++struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
++int nr_ioapics;
++
++/* MP IRQ source entries */
++struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
++
++/* # of MP IRQ source entries */
++int mp_irq_entries;
++
+ /*
+ * Rough estimation of how many shared IRQs there are, can
+ * be changed anytime.
+@@ -181,11 +193,10 @@ static inline void io_apic_modify(unsign
+ writel(value, &io_apic->data);
+ }
+
+-static int io_apic_level_ack_pending(unsigned int irq)
++static bool io_apic_level_ack_pending(unsigned int irq)
+ {
+ struct irq_pin_list *entry;
+ unsigned long flags;
+- int pending = 0;
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ entry = irq_2_pin + irq;
+@@ -198,13 +209,17 @@ static int io_apic_level_ack_pending(uns
+ break;
+ reg = io_apic_read(entry->apic, 0x10 + pin*2);
+ /* Is the remote IRR bit set? */
+- pending |= (reg >> 14) & 1;
++ if ((reg >> 14) & 1) {
++ spin_unlock_irqrestore(&ioapic_lock, flags);
++ return true;
++ }
+ if (!entry->next)
+ break;
+ entry = irq_2_pin + entry->next;
+ }
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+- return pending;
++
++ return false;
+ }
+ #endif
+
+@@ -762,7 +777,7 @@ static void __clear_irq_vector(int irq)
+ per_cpu(vector_irq, cpu)[vector] = -1;
+
+ cfg->vector = 0;
+- cfg->domain = CPU_MASK_NONE;
++ cpus_clear(cfg->domain);
+ }
+
+ void __setup_vector_irq(int cpu)
+@@ -899,9 +914,8 @@ static void __init setup_IO_APIC_irqs(vo
+ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, int vector)
+ {
+ struct IO_APIC_route_entry entry;
+- unsigned long flags;
+
+- memset(&entry,0,sizeof(entry));
++ memset(&entry, 0, sizeof(entry));
+
+ disable_8259A_irq(0);
+
+@@ -929,10 +943,7 @@ static void __init setup_ExtINT_IRQ0_pin
+ /*
+ * Add it to the IO-APIC irq-routing table:
+ */
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x11+2*pin, *(((int *)&entry)+1));
+- io_apic_write(apic, 0x10+2*pin, *(((int *)&entry)+0));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(apic, pin, entry);
+
+ enable_8259A_irq(0);
+ }
+@@ -1061,8 +1072,7 @@ void __apicdebuginit print_local_APIC(vo
+
+ printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
+ smp_processor_id(), hard_smp_processor_id());
+- v = apic_read(APIC_ID);
+- printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, GET_APIC_ID(v));
++ printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, GET_APIC_ID(read_apic_id()));
+ v = apic_read(APIC_LVR);
+ printk(KERN_INFO "... APIC VERSION: %08x\n", v);
+ ver = GET_APIC_VERSION(v);
+@@ -1260,7 +1270,7 @@ void disable_IO_APIC(void)
+ entry.dest_mode = 0; /* Physical */
+ entry.delivery_mode = dest_ExtINT; /* ExtInt */
+ entry.vector = 0;
+- entry.dest = GET_APIC_ID(apic_read(APIC_ID));
++ entry.dest = GET_APIC_ID(read_apic_id());
+
+ /*
+ * Add it to the IO-APIC irq-routing table:
+@@ -1353,9 +1363,7 @@ static int ioapic_retrigger_irq(unsigned
+ unsigned long flags;
+
+ spin_lock_irqsave(&vector_lock, flags);
+- cpus_clear(mask);
+- cpu_set(first_cpu(cfg->domain), mask);
+-
++ mask = cpumask_of_cpu(first_cpu(cfg->domain));
+ send_IPI_mask(mask, cfg->vector);
+ spin_unlock_irqrestore(&vector_lock, flags);
+
+@@ -1519,8 +1527,7 @@ static inline void init_IO_APIC_traps(vo
+ * 0x80, because int 0x80 is hm, kind of importantish. ;)
+ */
+ for (irq = 0; irq < NR_IRQS ; irq++) {
+- int tmp = irq;
+- if (IO_APIC_IRQ(tmp) && !irq_cfg[tmp].vector) {
++ if (IO_APIC_IRQ(irq) && !irq_cfg[irq].vector) {
+ /*
+ * Hmm.. We don't have an entry for this,
+ * so default to an old-fashioned 8259
+@@ -1597,22 +1604,19 @@ static void __init setup_nmi(void)
+ * cycles as some i82489DX-based boards have glue logic that keeps the
+ * 8259A interrupt line asserted until INTA. --macro
+ */
+-static inline void unlock_ExtINT_logic(void)
++static inline void __init unlock_ExtINT_logic(void)
+ {
+ int apic, pin, i;
+ struct IO_APIC_route_entry entry0, entry1;
+ unsigned char save_control, save_freq_select;
+- unsigned long flags;
+
+ pin = find_isa_irq_pin(8, mp_INT);
+ apic = find_isa_irq_apic(8, mp_INT);
+ if (pin == -1)
+ return;
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- *(((int *)&entry0) + 1) = io_apic_read(apic, 0x11 + 2 * pin);
+- *(((int *)&entry0) + 0) = io_apic_read(apic, 0x10 + 2 * pin);
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ entry0 = ioapic_read_entry(apic, pin);
++
+ clear_IO_APIC_pin(apic, pin);
+
+ memset(&entry1, 0, sizeof(entry1));
+@@ -1625,10 +1629,7 @@ static inline void unlock_ExtINT_logic(v
+ entry1.trigger = 0;
+ entry1.vector = 0;
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry1) + 1));
+- io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry1) + 0));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(apic, pin, entry1);
+
+ save_control = CMOS_READ(RTC_CONTROL);
+ save_freq_select = CMOS_READ(RTC_FREQ_SELECT);
+@@ -1647,10 +1648,7 @@ static inline void unlock_ExtINT_logic(v
+ CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
+ clear_IO_APIC_pin(apic, pin);
+
+- spin_lock_irqsave(&ioapic_lock, flags);
+- io_apic_write(apic, 0x11 + 2 * pin, *(((int *)&entry0) + 1));
+- io_apic_write(apic, 0x10 + 2 * pin, *(((int *)&entry0) + 0));
+- spin_unlock_irqrestore(&ioapic_lock, flags);
++ ioapic_write_entry(apic, pin, entry0);
+ }
+
+ /*
+@@ -2327,7 +2325,6 @@ static struct resource * __init ioapic_s
+ res = (void *)mem;
+
+ if (mem != NULL) {
+- memset(mem, 0, n);
+ mem += sizeof(struct resource) * nr_ioapics;
+
+ for (i = 0; i < nr_ioapics; i++) {
+--- /dev/null
++++ b/arch/x86/kernel/ipi-xen.c
+@@ -0,0 +1,232 @@
++#include <linux/cpumask.h>
++#include <linux/interrupt.h>
++#include <linux/init.h>
++
++#include <linux/mm.h>
++#include <linux/delay.h>
++#include <linux/spinlock.h>
++#include <linux/kernel_stat.h>
++#include <linux/mc146818rtc.h>
++#include <linux/cache.h>
++#include <linux/interrupt.h>
++#include <linux/cpu.h>
++#include <linux/module.h>
++
++#include <asm/smp.h>
++#include <asm/mtrr.h>
++#include <asm/tlbflush.h>
++#include <asm/mmu_context.h>
++#include <asm/apic.h>
++#include <asm/proto.h>
++
++#ifdef CONFIG_X86_32
++#ifndef CONFIG_XEN
++#include <mach_apic.h>
++/*
++ * the following functions deal with sending IPIs between CPUs.
++ *
++ * We use 'broadcast', CPU->CPU IPIs and self-IPIs too.
++ */
++
++static inline int __prepare_ICR(unsigned int shortcut, int vector)
++{
++ unsigned int icr = shortcut | APIC_DEST_LOGICAL;
++
++ switch (vector) {
++ default:
++ icr |= APIC_DM_FIXED | vector;
++ break;
++ case NMI_VECTOR:
++ icr |= APIC_DM_NMI;
++ break;
++ }
++ return icr;
++}
++
++static inline int __prepare_ICR2(unsigned int mask)
++{
++ return SET_APIC_DEST_FIELD(mask);
++}
++#else
++#include <xen/evtchn.h>
++
++DECLARE_PER_CPU(int, ipi_to_irq[NR_IPIS]);
++
++static inline void __send_IPI_one(unsigned int cpu, int vector)
++{
++ int irq = per_cpu(ipi_to_irq, cpu)[vector];
++ BUG_ON(irq < 0);
++ notify_remote_via_irq(irq);
++}
++#endif
++
++void __send_IPI_shortcut(unsigned int shortcut, int vector)
++{
++#ifndef CONFIG_XEN
++ /*
++ * Subtle. In the case of the 'never do double writes' workaround
++ * we have to lock out interrupts to be safe. As we don't care
++ * of the value read we use an atomic rmw access to avoid costly
++ * cli/sti. Otherwise we use an even cheaper single atomic write
++ * to the APIC.
++ */
++ unsigned int cfg;
++
++ /*
++ * Wait for idle.
++ */
++ apic_wait_icr_idle();
++
++ /*
++ * No need to touch the target chip field
++ */
++ cfg = __prepare_ICR(shortcut, vector);
++
++ /*
++ * Send the IPI. The write to APIC_ICR fires this off.
++ */
++ apic_write_around(APIC_ICR, cfg);
++#else
++ int cpu;
++
++ switch (shortcut) {
++ case APIC_DEST_SELF:
++ __send_IPI_one(smp_processor_id(), vector);
++ break;
++ case APIC_DEST_ALLBUT:
++ for_each_online_cpu(cpu)
++ if (cpu != smp_processor_id())
++ __send_IPI_one(cpu, vector);
++ break;
++ default:
++ printk("XXXXXX __send_IPI_shortcut %08x vector %d\n", shortcut,
++ vector);
++ break;
++ }
++#endif
++}
++
++void send_IPI_self(int vector)
++{
++ __send_IPI_shortcut(APIC_DEST_SELF, vector);
++}
++
++#ifndef CONFIG_XEN
++/*
++ * This is used to send an IPI with no shorthand notation (the destination is
++ * specified in bits 56 to 63 of the ICR).
++ */
++static inline void __send_IPI_dest_field(unsigned long mask, int vector)
++{
++ unsigned long cfg;
++
++ /*
++ * Wait for idle.
++ */
++ if (unlikely(vector == NMI_VECTOR))
++ safe_apic_wait_icr_idle();
++ else
++ apic_wait_icr_idle();
++
++ /*
++ * prepare target chip field
++ */
++ cfg = __prepare_ICR2(mask);
++ apic_write_around(APIC_ICR2, cfg);
++
++ /*
++ * program the ICR
++ */
++ cfg = __prepare_ICR(0, vector);
++
++ /*
++ * Send the IPI. The write to APIC_ICR fires this off.
++ */
++ apic_write_around(APIC_ICR, cfg);
++}
++#endif
++
++/*
++ * This is only used on smaller machines.
++ */
++void send_IPI_mask_bitmask(cpumask_t cpumask, int vector)
++{
++#ifndef CONFIG_XEN
++ unsigned long mask = cpus_addr(cpumask)[0];
++#else
++ cpumask_t mask;
++ unsigned int cpu;
++#endif
++ unsigned long flags;
++
++ local_irq_save(flags);
++#ifndef CONFIG_XEN
++ WARN_ON(mask & ~cpus_addr(cpu_online_map)[0]);
++ __send_IPI_dest_field(mask, vector);
++#else
++ cpus_andnot(mask, cpumask, cpu_online_map);
++ WARN_ON(!cpus_empty(mask));
++ for_each_online_cpu(cpu)
++ if (cpu_isset(cpu, cpumask))
++ __send_IPI_one(cpu, vector);
++#endif
++ local_irq_restore(flags);
++}
++
++void send_IPI_mask_sequence(cpumask_t mask, int vector)
++{
++#ifndef CONFIG_XEN
++ unsigned long flags;
++ unsigned int query_cpu;
++
++ /*
++ * Hack. The clustered APIC addressing mode doesn't allow us to send
++ * to an arbitrary mask, so I do a unicasts to each CPU instead. This
++ * should be modified to do 1 message per cluster ID - mbligh
++ */
++
++ local_irq_save(flags);
++ for_each_possible_cpu(query_cpu) {
++ if (cpu_isset(query_cpu, mask)) {
++ __send_IPI_dest_field(cpu_to_logical_apicid(query_cpu),
++ vector);
++ }
++ }
++ local_irq_restore(flags);
++#else
++ send_IPI_mask_bitmask(mask, vector);
++#endif
++}
++
++/* must come after the send_IPI functions above for inlining */
++#include <mach_ipi.h>
++
++#ifndef CONFIG_XEN
++static int convert_apicid_to_cpu(int apic_id)
++{
++ int i;
++
++ for_each_possible_cpu(i) {
++ if (per_cpu(x86_cpu_to_apicid, i) == apic_id)
++ return i;
++ }
++ return -1;
++}
++
++int safe_smp_processor_id(void)
++{
++ int apicid, cpuid;
++
++ if (!boot_cpu_has(X86_FEATURE_APIC))
++ return 0;
++
++ apicid = hard_smp_processor_id();
++ if (apicid == BAD_APICID)
++ return 0;
++
++ cpuid = convert_apicid_to_cpu(apicid);
++
++ return cpuid >= 0 ? cpuid : 0;
++}
++#endif
++#endif
+--- a/arch/x86/kernel/irq_32-xen.c
++++ b/arch/x86/kernel/irq_32-xen.c
+@@ -79,7 +79,7 @@ unsigned int do_IRQ(struct pt_regs *regs
+
+ if (unlikely((unsigned)irq >= NR_IRQS)) {
+ printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
+- __FUNCTION__, irq);
++ __func__, irq);
+ BUG();
+ }
+
+@@ -134,7 +134,7 @@ unsigned int do_IRQ(struct pt_regs *regs
+ : "=a" (arg1), "=d" (arg2), "=b" (bx)
+ : "0" (irq), "1" (desc), "2" (isp),
+ "D" (desc->handle_irq)
+- : "memory", "cc"
++ : "memory", "cc", "ecx"
+ );
+ } else
+ #endif
+@@ -190,8 +190,6 @@ void irq_ctx_exit(int cpu)
+ hardirq_ctx[cpu] = NULL;
+ }
+
+-extern asmlinkage void __do_softirq(void);
+-
+ asmlinkage void do_softirq(void)
+ {
+ unsigned long flags;
+--- a/arch/x86/kernel/machine_kexec_64.c
++++ b/arch/x86/kernel/machine_kexec_64.c
+@@ -120,8 +120,6 @@ int __init machine_kexec_setup_resources
+ return 0;
+ }
+
+-void machine_kexec_register_resources(struct resource *res) { ; }
+-
+ #else /* CONFIG_XEN */
+
+ #define x__pmd(x) __pmd(x)
+--- a/arch/x86/kernel/Makefile
++++ b/arch/x86/kernel/Makefile
+@@ -122,8 +122,7 @@ ifeq ($(CONFIG_X86_64),y)
+
+ obj-$(CONFIG_XEN) += nmi_64.o
+ time_64-$(CONFIG_XEN) += time_32.o
+- pci-dma_64-$(CONFIG_XEN) += pci-dma_32.o
+ endif
+
+-disabled-obj-$(CONFIG_XEN) := early-quirks.o hpet.o i8253.o i8259_$(BITS).o reboot.o \
+- smpboot_$(BITS).o tsc_$(BITS).o tsc_sync.o
++disabled-obj-$(CONFIG_XEN) := early-quirks.o hpet.o i8253.o i8259_$(BITS).o \
++ pci-swiotlb_64.o reboot.o smpboot.o tlb_$(BITS).o tsc_$(BITS).o tsc_sync.o vsmp_64.o
+--- a/arch/x86/kernel/microcode-xen.c
++++ b/arch/x86/kernel/microcode-xen.c
+@@ -162,7 +162,7 @@ static int request_microcode(void)
+ c->x86, c->x86_model, c->x86_mask);
+ error = request_firmware(&firmware, name, µcode_pdev->dev);
+ if (error) {
+- pr_debug("ucode data file %s load failed\n", name);
++ pr_debug("microcode: ucode data file %s load failed\n", name);
+ return error;
+ }
+
+--- a/arch/x86/kernel/mmconf-fam10h_64.c
++++ b/arch/x86/kernel/mmconf-fam10h_64.c
+@@ -219,6 +219,16 @@ void __cpuinit fam10h_check_enable_mmcfg
+ val |= fam10h_pci_mmconf_base | (8 << FAM10H_MMIO_CONF_BUSRANGE_SHIFT) |
+ FAM10H_MMIO_CONF_ENABLE;
+ wrmsrl(address, val);
++
++#ifdef CONFIG_XEN
++ {
++ u64 val2;
++
++ rdmsrl(address, val2);
++ if (val2 != val)
++ pci_probe &= ~PCI_CHECK_ENABLE_AMD_MMCONF;
++ }
++#endif
+ }
+
+ static int __devinit set_check_enable_amd_mmconf(const struct dmi_system_id *d)
+--- a/arch/x86/kernel/mpparse_32-xen.c
++++ /dev/null
+@@ -1,1161 +0,0 @@
+-/*
+- * Intel Multiprocessor Specification 1.1 and 1.4
+- * compliant MP-table parsing routines.
+- *
+- * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
+- * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
+- *
+- * Fixes
+- * Erich Boleyn : MP v1.4 and additional changes.
+- * Alan Cox : Added EBDA scanning
+- * Ingo Molnar : various cleanups and rewrites
+- * Maciej W. Rozycki: Bits for default MP configurations
+- * Paul Diefenbaugh: Added full ACPI support
+- */
+-
+-#include <linux/mm.h>
+-#include <linux/init.h>
+-#include <linux/acpi.h>
+-#include <linux/delay.h>
+-#include <linux/bootmem.h>
+-#include <linux/kernel_stat.h>
+-#include <linux/mc146818rtc.h>
+-#include <linux/bitops.h>
+-
+-#include <asm/smp.h>
+-#include <asm/acpi.h>
+-#include <asm/mtrr.h>
+-#include <asm/mpspec.h>
+-#include <asm/io_apic.h>
+-
+-#include <mach_apic.h>
+-#include <mach_apicdef.h>
+-#include <mach_mpparse.h>
+-#include <bios_ebda.h>
+-
+-/* Have we found an MP table */
+-int smp_found_config;
+-unsigned int __cpuinitdata maxcpus = NR_CPUS;
+-
+-/*
+- * Various Linux-internal data structures created from the
+- * MP-table.
+- */
+-int apic_version [MAX_APICS];
+-int mp_bus_id_to_type [MAX_MP_BUSSES];
+-int mp_bus_id_to_node [MAX_MP_BUSSES];
+-int mp_bus_id_to_local [MAX_MP_BUSSES];
+-int quad_local_to_mp_bus_id [NR_CPUS/4][4];
+-int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
+-static int mp_current_pci_id;
+-
+-/* I/O APIC entries */
+-struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
+-
+-/* # of MP IRQ source entries */
+-struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
+-
+-/* MP IRQ source entries */
+-int mp_irq_entries;
+-
+-int nr_ioapics;
+-
+-int pic_mode;
+-unsigned long mp_lapic_addr;
+-
+-unsigned int def_to_bigsmp = 0;
+-
+-/* Processor that is doing the boot up */
+-unsigned int boot_cpu_physical_apicid = -1U;
+-/* Internal processor count */
+-unsigned int num_processors;
+-
+-/* Bitmask of physically existing CPUs */
+-physid_mask_t phys_cpu_present_map;
+-
+-u8 bios_cpu_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
+-
+-/*
+- * Intel MP BIOS table parsing routines:
+- */
+-
+-
+-/*
+- * Checksum an MP configuration block.
+- */
+-
+-static int __init mpf_checksum(unsigned char *mp, int len)
+-{
+- int sum = 0;
+-
+- while (len--)
+- sum += *mp++;
+-
+- return sum & 0xFF;
+-}
+-
+-/*
+- * Have to match translation table entries to main table entries by counter
+- * hence the mpc_record variable .... can't see a less disgusting way of
+- * doing this ....
+- */
+-
+-static int mpc_record;
+-static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY] __cpuinitdata;
+-
+-#ifndef CONFIG_XEN
+-static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
+-{
+- int ver, apicid;
+- physid_mask_t phys_cpu;
+-
+- if (!(m->mpc_cpuflag & CPU_ENABLED))
+- return;
+-
+- apicid = mpc_apic_id(m, translation_table[mpc_record]);
+-
+- if (m->mpc_featureflag&(1<<0))
+- Dprintk(" Floating point unit present.\n");
+- if (m->mpc_featureflag&(1<<7))
+- Dprintk(" Machine Exception supported.\n");
+- if (m->mpc_featureflag&(1<<8))
+- Dprintk(" 64 bit compare & exchange supported.\n");
+- if (m->mpc_featureflag&(1<<9))
+- Dprintk(" Internal APIC present.\n");
+- if (m->mpc_featureflag&(1<<11))
+- Dprintk(" SEP present.\n");
+- if (m->mpc_featureflag&(1<<12))
+- Dprintk(" MTRR present.\n");
+- if (m->mpc_featureflag&(1<<13))
+- Dprintk(" PGE present.\n");
+- if (m->mpc_featureflag&(1<<14))
+- Dprintk(" MCA present.\n");
+- if (m->mpc_featureflag&(1<<15))
+- Dprintk(" CMOV present.\n");
+- if (m->mpc_featureflag&(1<<16))
+- Dprintk(" PAT present.\n");
+- if (m->mpc_featureflag&(1<<17))
+- Dprintk(" PSE present.\n");
+- if (m->mpc_featureflag&(1<<18))
+- Dprintk(" PSN present.\n");
+- if (m->mpc_featureflag&(1<<19))
+- Dprintk(" Cache Line Flush Instruction present.\n");
+- /* 20 Reserved */
+- if (m->mpc_featureflag&(1<<21))
+- Dprintk(" Debug Trace and EMON Store present.\n");
+- if (m->mpc_featureflag&(1<<22))
+- Dprintk(" ACPI Thermal Throttle Registers present.\n");
+- if (m->mpc_featureflag&(1<<23))
+- Dprintk(" MMX present.\n");
+- if (m->mpc_featureflag&(1<<24))
+- Dprintk(" FXSR present.\n");
+- if (m->mpc_featureflag&(1<<25))
+- Dprintk(" XMM present.\n");
+- if (m->mpc_featureflag&(1<<26))
+- Dprintk(" Willamette New Instructions present.\n");
+- if (m->mpc_featureflag&(1<<27))
+- Dprintk(" Self Snoop present.\n");
+- if (m->mpc_featureflag&(1<<28))
+- Dprintk(" HT present.\n");
+- if (m->mpc_featureflag&(1<<29))
+- Dprintk(" Thermal Monitor present.\n");
+- /* 30, 31 Reserved */
+-
+-
+- if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
+- Dprintk(" Bootup CPU\n");
+- boot_cpu_physical_apicid = m->mpc_apicid;
+- }
+-
+- ver = m->mpc_apicver;
+-
+- /*
+- * Validate version
+- */
+- if (ver == 0x0) {
+- printk(KERN_WARNING "BIOS bug, APIC version is 0 for CPU#%d! "
+- "fixing up to 0x10. (tell your hw vendor)\n",
+- m->mpc_apicid);
+- ver = 0x10;
+- }
+- apic_version[m->mpc_apicid] = ver;
+-
+- phys_cpu = apicid_to_cpu_present(apicid);
+- physids_or(phys_cpu_present_map, phys_cpu_present_map, phys_cpu);
+-
+- if (num_processors >= NR_CPUS) {
+- printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
+- " Processor ignored.\n", NR_CPUS);
+- return;
+- }
+-
+- if (num_processors >= maxcpus) {
+- printk(KERN_WARNING "WARNING: maxcpus limit of %i reached."
+- " Processor ignored.\n", maxcpus);
+- return;
+- }
+-
+- cpu_set(num_processors, cpu_possible_map);
+- num_processors++;
+-
+- /*
+- * Would be preferable to switch to bigsmp when CONFIG_HOTPLUG_CPU=y
+- * but we need to work other dependencies like SMP_SUSPEND etc
+- * before this can be done without some confusion.
+- * if (CPU_HOTPLUG_ENABLED || num_processors > 8)
+- * - Ashok Raj <ashok.raj@intel.com>
+- */
+- if (num_processors > 8) {
+- switch (boot_cpu_data.x86_vendor) {
+- case X86_VENDOR_INTEL:
+- if (!APIC_XAPIC(ver)) {
+- def_to_bigsmp = 0;
+- break;
+- }
+- /* If P4 and above fall through */
+- case X86_VENDOR_AMD:
+- def_to_bigsmp = 1;
+- }
+- }
+- bios_cpu_apicid[num_processors - 1] = m->mpc_apicid;
+-}
+-#else
+-static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
+-{
+- num_processors++;
+-}
+-#endif /* CONFIG_XEN */
+-
+-static void __init MP_bus_info (struct mpc_config_bus *m)
+-{
+- char str[7];
+-
+- memcpy(str, m->mpc_bustype, 6);
+- str[6] = 0;
+-
+- mpc_oem_bus_info(m, str, translation_table[mpc_record]);
+-
+-#if MAX_MP_BUSSES < 256
+- if (m->mpc_busid >= MAX_MP_BUSSES) {
+- printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
+- " is too large, max. supported is %d\n",
+- m->mpc_busid, str, MAX_MP_BUSSES - 1);
+- return;
+- }
+-#endif
+-
+- if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA)-1) == 0) {
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
+- } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA)-1) == 0) {
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_EISA;
+- } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI)-1) == 0) {
+- mpc_oem_pci_bus(m, translation_table[mpc_record]);
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI;
+- mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
+- mp_current_pci_id++;
+- } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA)-1) == 0) {
+- mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
+- } else {
+- printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
+- }
+-}
+-
+-static void __init MP_ioapic_info (struct mpc_config_ioapic *m)
+-{
+- if (!(m->mpc_flags & MPC_APIC_USABLE))
+- return;
+-
+- printk(KERN_INFO "I/O APIC #%d Version %d at 0x%X.\n",
+- m->mpc_apicid, m->mpc_apicver, m->mpc_apicaddr);
+- if (nr_ioapics >= MAX_IO_APICS) {
+- printk(KERN_CRIT "Max # of I/O APICs (%d) exceeded (found %d).\n",
+- MAX_IO_APICS, nr_ioapics);
+- panic("Recompile kernel with bigger MAX_IO_APICS!.\n");
+- }
+- if (!m->mpc_apicaddr) {
+- printk(KERN_ERR "WARNING: bogus zero I/O APIC address"
+- " found in MP table, skipping!\n");
+- return;
+- }
+- mp_ioapics[nr_ioapics] = *m;
+- nr_ioapics++;
+-}
+-
+-static void __init MP_intsrc_info (struct mpc_config_intsrc *m)
+-{
+- mp_irqs [mp_irq_entries] = *m;
+- Dprintk("Int: type %d, pol %d, trig %d, bus %d,"
+- " IRQ %02x, APIC ID %x, APIC INT %02x\n",
+- m->mpc_irqtype, m->mpc_irqflag & 3,
+- (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
+- m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
+- if (++mp_irq_entries == MAX_IRQ_SOURCES)
+- panic("Max # of irq sources exceeded!!\n");
+-}
+-
+-static void __init MP_lintsrc_info (struct mpc_config_lintsrc *m)
+-{
+- Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
+- " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
+- m->mpc_irqtype, m->mpc_irqflag & 3,
+- (m->mpc_irqflag >> 2) &3, m->mpc_srcbusid,
+- m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
+-}
+-
+-#ifdef CONFIG_X86_NUMAQ
+-static void __init MP_translation_info (struct mpc_config_translation *m)
+-{
+- printk(KERN_INFO "Translation: record %d, type %d, quad %d, global %d, local %d\n", mpc_record, m->trans_type, m->trans_quad, m->trans_global, m->trans_local);
+-
+- if (mpc_record >= MAX_MPC_ENTRY)
+- printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n");
+- else
+- translation_table[mpc_record] = m; /* stash this for later */
+- if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad))
+- node_set_online(m->trans_quad);
+-}
+-
+-/*
+- * Read/parse the MPC oem tables
+- */
+-
+-static void __init smp_read_mpc_oem(struct mp_config_oemtable *oemtable, \
+- unsigned short oemsize)
+-{
+- int count = sizeof (*oemtable); /* the header size */
+- unsigned char *oemptr = ((unsigned char *)oemtable)+count;
+-
+- mpc_record = 0;
+- printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n", oemtable);
+- if (memcmp(oemtable->oem_signature,MPC_OEM_SIGNATURE,4))
+- {
+- printk(KERN_WARNING "SMP mpc oemtable: bad signature [%c%c%c%c]!\n",
+- oemtable->oem_signature[0],
+- oemtable->oem_signature[1],
+- oemtable->oem_signature[2],
+- oemtable->oem_signature[3]);
+- return;
+- }
+- if (mpf_checksum((unsigned char *)oemtable,oemtable->oem_length))
+- {
+- printk(KERN_WARNING "SMP oem mptable: checksum error!\n");
+- return;
+- }
+- while (count < oemtable->oem_length) {
+- switch (*oemptr) {
+- case MP_TRANSLATION:
+- {
+- struct mpc_config_translation *m=
+- (struct mpc_config_translation *)oemptr;
+- MP_translation_info(m);
+- oemptr += sizeof(*m);
+- count += sizeof(*m);
+- ++mpc_record;
+- break;
+- }
+- default:
+- {
+- printk(KERN_WARNING "Unrecognised OEM table entry type! - %d\n", (int) *oemptr);
+- return;
+- }
+- }
+- }
+-}
+-
+-static inline void mps_oem_check(struct mp_config_table *mpc, char *oem,
+- char *productid)
+-{
+- if (strncmp(oem, "IBM NUMA", 8))
+- printk("Warning! May not be a NUMA-Q system!\n");
+- if (mpc->mpc_oemptr)
+- smp_read_mpc_oem((struct mp_config_oemtable *) mpc->mpc_oemptr,
+- mpc->mpc_oemsize);
+-}
+-#endif /* CONFIG_X86_NUMAQ */
+-
+-/*
+- * Read/parse the MPC
+- */
+-
+-static int __init smp_read_mpc(struct mp_config_table *mpc)
+-{
+- char str[16];
+- char oem[10];
+- int count=sizeof(*mpc);
+- unsigned char *mpt=((unsigned char *)mpc)+count;
+-
+- if (memcmp(mpc->mpc_signature,MPC_SIGNATURE,4)) {
+- printk(KERN_ERR "SMP mptable: bad signature [0x%x]!\n",
+- *(u32 *)mpc->mpc_signature);
+- return 0;
+- }
+- if (mpf_checksum((unsigned char *)mpc,mpc->mpc_length)) {
+- printk(KERN_ERR "SMP mptable: checksum error!\n");
+- return 0;
+- }
+- if (mpc->mpc_spec!=0x01 && mpc->mpc_spec!=0x04) {
+- printk(KERN_ERR "SMP mptable: bad table version (%d)!!\n",
+- mpc->mpc_spec);
+- return 0;
+- }
+- if (!mpc->mpc_lapic) {
+- printk(KERN_ERR "SMP mptable: null local APIC address!\n");
+- return 0;
+- }
+- memcpy(oem,mpc->mpc_oem,8);
+- oem[8]=0;
+- printk(KERN_INFO "OEM ID: %s ",oem);
+-
+- memcpy(str,mpc->mpc_productid,12);
+- str[12]=0;
+- printk("Product ID: %s ",str);
+-
+- mps_oem_check(mpc, oem, str);
+-
+- printk("APIC at: 0x%X\n", mpc->mpc_lapic);
+-
+- /*
+- * Save the local APIC address (it might be non-default) -- but only
+- * if we're not using ACPI.
+- */
+- if (!acpi_lapic)
+- mp_lapic_addr = mpc->mpc_lapic;
+-
+- /*
+- * Now process the configuration blocks.
+- */
+- mpc_record = 0;
+- while (count < mpc->mpc_length) {
+- switch(*mpt) {
+- case MP_PROCESSOR:
+- {
+- struct mpc_config_processor *m=
+- (struct mpc_config_processor *)mpt;
+- /* ACPI may have already provided this data */
+- if (!acpi_lapic)
+- MP_processor_info(m);
+- mpt += sizeof(*m);
+- count += sizeof(*m);
+- break;
+- }
+- case MP_BUS:
+- {
+- struct mpc_config_bus *m=
+- (struct mpc_config_bus *)mpt;
+- MP_bus_info(m);
+- mpt += sizeof(*m);
+- count += sizeof(*m);
+- break;
+- }
+- case MP_IOAPIC:
+- {
+- struct mpc_config_ioapic *m=
+- (struct mpc_config_ioapic *)mpt;
+- MP_ioapic_info(m);
+- mpt+=sizeof(*m);
+- count+=sizeof(*m);
+- break;
+- }
+- case MP_INTSRC:
+- {
+- struct mpc_config_intsrc *m=
+- (struct mpc_config_intsrc *)mpt;
+-
+- MP_intsrc_info(m);
+- mpt+=sizeof(*m);
+- count+=sizeof(*m);
+- break;
+- }
+- case MP_LINTSRC:
+- {
+- struct mpc_config_lintsrc *m=
+- (struct mpc_config_lintsrc *)mpt;
+- MP_lintsrc_info(m);
+- mpt+=sizeof(*m);
+- count+=sizeof(*m);
+- break;
+- }
+- default:
+- {
+- count = mpc->mpc_length;
+- break;
+- }
+- }
+- ++mpc_record;
+- }
+- setup_apic_routing();
+- if (!num_processors)
+- printk(KERN_ERR "SMP mptable: no processors registered!\n");
+- return num_processors;
+-}
+-
+-static int __init ELCR_trigger(unsigned int irq)
+-{
+- unsigned int port;
+-
+- port = 0x4d0 + (irq >> 3);
+- return (inb(port) >> (irq & 7)) & 1;
+-}
+-
+-static void __init construct_default_ioirq_mptable(int mpc_default_type)
+-{
+- struct mpc_config_intsrc intsrc;
+- int i;
+- int ELCR_fallback = 0;
+-
+- intsrc.mpc_type = MP_INTSRC;
+- intsrc.mpc_irqflag = 0; /* conforming */
+- intsrc.mpc_srcbus = 0;
+- intsrc.mpc_dstapic = mp_ioapics[0].mpc_apicid;
+-
+- intsrc.mpc_irqtype = mp_INT;
+-
+- /*
+- * If true, we have an ISA/PCI system with no IRQ entries
+- * in the MP table. To prevent the PCI interrupts from being set up
+- * incorrectly, we try to use the ELCR. The sanity check to see if
+- * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
+- * never be level sensitive, so we simply see if the ELCR agrees.
+- * If it does, we assume it's valid.
+- */
+- if (mpc_default_type == 5) {
+- printk(KERN_INFO "ISA/PCI bus type with no IRQ information... falling back to ELCR\n");
+-
+- if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) || ELCR_trigger(13))
+- printk(KERN_WARNING "ELCR contains invalid data... not using ELCR\n");
+- else {
+- printk(KERN_INFO "Using ELCR to identify PCI interrupts\n");
+- ELCR_fallback = 1;
+- }
+- }
+-
+- for (i = 0; i < 16; i++) {
+- switch (mpc_default_type) {
+- case 2:
+- if (i == 0 || i == 13)
+- continue; /* IRQ0 & IRQ13 not connected */
+- /* fall through */
+- default:
+- if (i == 2)
+- continue; /* IRQ2 is never connected */
+- }
+-
+- if (ELCR_fallback) {
+- /*
+- * If the ELCR indicates a level-sensitive interrupt, we
+- * copy that information over to the MP table in the
+- * irqflag field (level sensitive, active high polarity).
+- */
+- if (ELCR_trigger(i))
+- intsrc.mpc_irqflag = 13;
+- else
+- intsrc.mpc_irqflag = 0;
+- }
+-
+- intsrc.mpc_srcbusirq = i;
+- intsrc.mpc_dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
+- MP_intsrc_info(&intsrc);
+- }
+-
+- intsrc.mpc_irqtype = mp_ExtINT;
+- intsrc.mpc_srcbusirq = 0;
+- intsrc.mpc_dstirq = 0; /* 8259A to INTIN0 */
+- MP_intsrc_info(&intsrc);
+-}
+-
+-static inline void __init construct_default_ISA_mptable(int mpc_default_type)
+-{
+- struct mpc_config_processor processor;
+- struct mpc_config_bus bus;
+- struct mpc_config_ioapic ioapic;
+- struct mpc_config_lintsrc lintsrc;
+- int linttypes[2] = { mp_ExtINT, mp_NMI };
+- int i;
+-
+- /*
+- * local APIC has default address
+- */
+- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
+-
+- /*
+- * 2 CPUs, numbered 0 & 1.
+- */
+- processor.mpc_type = MP_PROCESSOR;
+- /* Either an integrated APIC or a discrete 82489DX. */
+- processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
+- processor.mpc_cpuflag = CPU_ENABLED;
+- processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
+- (boot_cpu_data.x86_model << 4) |
+- boot_cpu_data.x86_mask;
+- processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
+- processor.mpc_reserved[0] = 0;
+- processor.mpc_reserved[1] = 0;
+- for (i = 0; i < 2; i++) {
+- processor.mpc_apicid = i;
+- MP_processor_info(&processor);
+- }
+-
+- bus.mpc_type = MP_BUS;
+- bus.mpc_busid = 0;
+- switch (mpc_default_type) {
+- default:
+- printk("???\n");
+- printk(KERN_ERR "Unknown standard configuration %d\n",
+- mpc_default_type);
+- /* fall through */
+- case 1:
+- case 5:
+- memcpy(bus.mpc_bustype, "ISA ", 6);
+- break;
+- case 2:
+- case 6:
+- case 3:
+- memcpy(bus.mpc_bustype, "EISA ", 6);
+- break;
+- case 4:
+- case 7:
+- memcpy(bus.mpc_bustype, "MCA ", 6);
+- }
+- MP_bus_info(&bus);
+- if (mpc_default_type > 4) {
+- bus.mpc_busid = 1;
+- memcpy(bus.mpc_bustype, "PCI ", 6);
+- MP_bus_info(&bus);
+- }
+-
+- ioapic.mpc_type = MP_IOAPIC;
+- ioapic.mpc_apicid = 2;
+- ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
+- ioapic.mpc_flags = MPC_APIC_USABLE;
+- ioapic.mpc_apicaddr = 0xFEC00000;
+- MP_ioapic_info(&ioapic);
+-
+- /*
+- * We set up most of the low 16 IO-APIC pins according to MPS rules.
+- */
+- construct_default_ioirq_mptable(mpc_default_type);
+-
+- lintsrc.mpc_type = MP_LINTSRC;
+- lintsrc.mpc_irqflag = 0; /* conforming */
+- lintsrc.mpc_srcbusid = 0;
+- lintsrc.mpc_srcbusirq = 0;
+- lintsrc.mpc_destapic = MP_APIC_ALL;
+- for (i = 0; i < 2; i++) {
+- lintsrc.mpc_irqtype = linttypes[i];
+- lintsrc.mpc_destapiclint = i;
+- MP_lintsrc_info(&lintsrc);
+- }
+-}
+-
+-static struct intel_mp_floating *mpf_found;
+-
+-/*
+- * Scan the memory blocks for an SMP configuration block.
+- */
+-void __init get_smp_config (void)
+-{
+- struct intel_mp_floating *mpf = mpf_found;
+-
+- /*
+- * ACPI supports both logical (e.g. Hyper-Threading) and physical
+- * processors, where MPS only supports physical.
+- */
+- if (acpi_lapic && acpi_ioapic) {
+- printk(KERN_INFO "Using ACPI (MADT) for SMP configuration information\n");
+- return;
+- }
+- else if (acpi_lapic)
+- printk(KERN_INFO "Using ACPI for processor (LAPIC) configuration information\n");
+-
+- printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n", mpf->mpf_specification);
+- if (mpf->mpf_feature2 & (1<<7)) {
+- printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
+- pic_mode = 1;
+- } else {
+- printk(KERN_INFO " Virtual Wire compatibility mode.\n");
+- pic_mode = 0;
+- }
+-
+- /*
+- * Now see if we need to read further.
+- */
+- if (mpf->mpf_feature1 != 0) {
+-
+- printk(KERN_INFO "Default MP configuration #%d\n", mpf->mpf_feature1);
+- construct_default_ISA_mptable(mpf->mpf_feature1);
+-
+- } else if (mpf->mpf_physptr) {
+-
+- /*
+- * Read the physical hardware table. Anything here will
+- * override the defaults.
+- */
+- if (!smp_read_mpc(isa_bus_to_virt(mpf->mpf_physptr))) {
+- smp_found_config = 0;
+- printk(KERN_ERR "BIOS bug, MP table errors detected!...\n");
+- printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
+- return;
+- }
+- /*
+- * If there are no explicit MP IRQ entries, then we are
+- * broken. We set up most of the low 16 IO-APIC pins to
+- * ISA defaults and hope it will work.
+- */
+- if (!mp_irq_entries) {
+- struct mpc_config_bus bus;
+-
+- printk(KERN_ERR "BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n");
+-
+- bus.mpc_type = MP_BUS;
+- bus.mpc_busid = 0;
+- memcpy(bus.mpc_bustype, "ISA ", 6);
+- MP_bus_info(&bus);
+-
+- construct_default_ioirq_mptable(0);
+- }
+-
+- } else
+- BUG();
+-
+- printk(KERN_INFO "Processors: %d\n", num_processors);
+- /*
+- * Only use the first configuration found.
+- */
+-}
+-
+-static int __init smp_scan_config (unsigned long base, unsigned long length)
+-{
+- unsigned long *bp = isa_bus_to_virt(base);
+- struct intel_mp_floating *mpf;
+-
+- printk(KERN_INFO "Scan SMP from %p for %ld bytes.\n", bp,length);
+- if (sizeof(*mpf) != 16)
+- printk("Error: MPF size\n");
+-
+- while (length > 0) {
+- mpf = (struct intel_mp_floating *)bp;
+- if ((*bp == SMP_MAGIC_IDENT) &&
+- (mpf->mpf_length == 1) &&
+- !mpf_checksum((unsigned char *)bp, 16) &&
+- ((mpf->mpf_specification == 1)
+- || (mpf->mpf_specification == 4)) ) {
+-
+- smp_found_config = 1;
+-#ifndef CONFIG_XEN
+- printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
+- mpf, virt_to_phys(mpf));
+- reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE,
+- BOOTMEM_DEFAULT);
+- if (mpf->mpf_physptr) {
+- /*
+- * We cannot access to MPC table to compute
+- * table size yet, as only few megabytes from
+- * the bottom is mapped now.
+- * PC-9800's MPC table places on the very last
+- * of physical memory; so that simply reserving
+- * PAGE_SIZE from mpg->mpf_physptr yields BUG()
+- * in reserve_bootmem.
+- */
+- unsigned long size = PAGE_SIZE;
+- unsigned long end = max_low_pfn * PAGE_SIZE;
+- if (mpf->mpf_physptr + size > end)
+- size = end - mpf->mpf_physptr;
+- reserve_bootmem(mpf->mpf_physptr, size,
+- BOOTMEM_DEFAULT);
+- }
+-#else
+- printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
+- mpf, ((void *)bp - isa_bus_to_virt(base)) + base);
+-#endif
+-
+- mpf_found = mpf;
+- return 1;
+- }
+- bp += 4;
+- length -= 16;
+- }
+- return 0;
+-}
+-
+-void __init find_smp_config (void)
+-{
+-#ifndef CONFIG_XEN
+- unsigned int address;
+-#endif
+-
+- /*
+- * FIXME: Linux assumes you have 640K of base ram..
+- * this continues the error...
+- *
+- * 1) Scan the bottom 1K for a signature
+- * 2) Scan the top 1K of base RAM
+- * 3) Scan the 64K of bios
+- */
+- if (smp_scan_config(0x0,0x400) ||
+- smp_scan_config(639*0x400,0x400) ||
+- smp_scan_config(0xF0000,0x10000))
+- return;
+- /*
+- * If it is an SMP machine we should know now, unless the
+- * configuration is in an EISA/MCA bus machine with an
+- * extended bios data area.
+- *
+- * there is a real-mode segmented pointer pointing to the
+- * 4K EBDA area at 0x40E, calculate and scan it here.
+- *
+- * NOTE! There are Linux loaders that will corrupt the EBDA
+- * area, and as such this kind of SMP config may be less
+- * trustworthy, simply because the SMP table may have been
+- * stomped on during early boot. These loaders are buggy and
+- * should be fixed.
+- *
+- * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
+- */
+-
+-#ifndef CONFIG_XEN
+- address = get_bios_ebda();
+- if (address)
+- smp_scan_config(address, 0x400);
+-#endif
+-}
+-
+-int es7000_plat;
+-
+-/* --------------------------------------------------------------------------
+- ACPI-based MP Configuration
+- -------------------------------------------------------------------------- */
+-
+-#ifdef CONFIG_ACPI
+-
+-void __init mp_register_lapic_address(u64 address)
+-{
+-#ifndef CONFIG_XEN
+- mp_lapic_addr = (unsigned long) address;
+-
+- set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
+-
+- if (boot_cpu_physical_apicid == -1U)
+- boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
+-
+- Dprintk("Boot CPU = %d\n", boot_cpu_physical_apicid);
+-#endif
+-}
+-
+-void __cpuinit mp_register_lapic (u8 id, u8 enabled)
+-{
+- struct mpc_config_processor processor;
+- int boot_cpu = 0;
+-
+- if (MAX_APICS - id <= 0) {
+- printk(KERN_WARNING "Processor #%d invalid (max %d)\n",
+- id, MAX_APICS);
+- return;
+- }
+-
+- if (id == boot_cpu_physical_apicid)
+- boot_cpu = 1;
+-
+-#ifndef CONFIG_XEN
+- processor.mpc_type = MP_PROCESSOR;
+- processor.mpc_apicid = id;
+- processor.mpc_apicver = GET_APIC_VERSION(apic_read(APIC_LVR));
+- processor.mpc_cpuflag = (enabled ? CPU_ENABLED : 0);
+- processor.mpc_cpuflag |= (boot_cpu ? CPU_BOOTPROCESSOR : 0);
+- processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
+- (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
+- processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
+- processor.mpc_reserved[0] = 0;
+- processor.mpc_reserved[1] = 0;
+-#endif
+-
+- MP_processor_info(&processor);
+-}
+-
+-#ifdef CONFIG_X86_IO_APIC
+-
+-#define MP_ISA_BUS 0
+-#define MP_MAX_IOAPIC_PIN 127
+-
+-static struct mp_ioapic_routing {
+- int apic_id;
+- int gsi_base;
+- int gsi_end;
+- u32 pin_programmed[4];
+-} mp_ioapic_routing[MAX_IO_APICS];
+-
+-static int mp_find_ioapic (int gsi)
+-{
+- int i = 0;
+-
+- /* Find the IOAPIC that manages this GSI. */
+- for (i = 0; i < nr_ioapics; i++) {
+- if ((gsi >= mp_ioapic_routing[i].gsi_base)
+- && (gsi <= mp_ioapic_routing[i].gsi_end))
+- return i;
+- }
+-
+- printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
+-
+- return -1;
+-}
+-
+-void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
+-{
+- int idx = 0;
+- int tmpid;
+-
+- if (nr_ioapics >= MAX_IO_APICS) {
+- printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
+- "(found %d)\n", MAX_IO_APICS, nr_ioapics);
+- panic("Recompile kernel with bigger MAX_IO_APICS!\n");
+- }
+- if (!address) {
+- printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
+- " found in MADT table, skipping!\n");
+- return;
+- }
+-
+- idx = nr_ioapics++;
+-
+- mp_ioapics[idx].mpc_type = MP_IOAPIC;
+- mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
+- mp_ioapics[idx].mpc_apicaddr = address;
+-
+-#ifndef CONFIG_XEN
+- set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
+-#endif
+- if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+- && !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+- tmpid = io_apic_get_unique_id(idx, id);
+- else
+- tmpid = id;
+- if (tmpid == -1) {
+- nr_ioapics--;
+- return;
+- }
+- mp_ioapics[idx].mpc_apicid = tmpid;
+- mp_ioapics[idx].mpc_apicver = io_apic_get_version(idx);
+-
+- /*
+- * Build basic GSI lookup table to facilitate gsi->io_apic lookups
+- * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
+- */
+- mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid;
+- mp_ioapic_routing[idx].gsi_base = gsi_base;
+- mp_ioapic_routing[idx].gsi_end = gsi_base +
+- io_apic_get_redir_entries(idx);
+-
+- printk("IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
+- "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
+- mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
+- mp_ioapic_routing[idx].gsi_base,
+- mp_ioapic_routing[idx].gsi_end);
+-}
+-
+-void __init
+-mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
+-{
+- struct mpc_config_intsrc intsrc;
+- int ioapic = -1;
+- int pin = -1;
+-
+- /*
+- * Convert 'gsi' to 'ioapic.pin'.
+- */
+- ioapic = mp_find_ioapic(gsi);
+- if (ioapic < 0)
+- return;
+- pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
+-
+- /*
+- * TBD: This check is for faulty timer entries, where the override
+- * erroneously sets the trigger to level, resulting in a HUGE
+- * increase of timer interrupts!
+- */
+- if ((bus_irq == 0) && (trigger == 3))
+- trigger = 1;
+-
+- intsrc.mpc_type = MP_INTSRC;
+- intsrc.mpc_irqtype = mp_INT;
+- intsrc.mpc_irqflag = (trigger << 2) | polarity;
+- intsrc.mpc_srcbus = MP_ISA_BUS;
+- intsrc.mpc_srcbusirq = bus_irq; /* IRQ */
+- intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; /* APIC ID */
+- intsrc.mpc_dstirq = pin; /* INTIN# */
+-
+- Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, %d-%d\n",
+- intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
+- (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
+- intsrc.mpc_srcbusirq, intsrc.mpc_dstapic, intsrc.mpc_dstirq);
+-
+- mp_irqs[mp_irq_entries] = intsrc;
+- if (++mp_irq_entries == MAX_IRQ_SOURCES)
+- panic("Max # of irq sources exceeded!\n");
+-}
+-
+-void __init mp_config_acpi_legacy_irqs (void)
+-{
+- struct mpc_config_intsrc intsrc;
+- int i = 0;
+- int ioapic = -1;
+-
+- /*
+- * Fabricate the legacy ISA bus (bus #31).
+- */
+- mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
+- Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
+-
+- /*
+- * Older generations of ES7000 have no legacy identity mappings
+- */
+- if (es7000_plat == 1)
+- return;
+-
+- /*
+- * Locate the IOAPIC that manages the ISA IRQs (0-15).
+- */
+- ioapic = mp_find_ioapic(0);
+- if (ioapic < 0)
+- return;
+-
+- intsrc.mpc_type = MP_INTSRC;
+- intsrc.mpc_irqflag = 0; /* Conforming */
+- intsrc.mpc_srcbus = MP_ISA_BUS;
+- intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid;
+-
+- /*
+- * Use the default configuration for the IRQs 0-15. Unless
+- * overridden by (MADT) interrupt source override entries.
+- */
+- for (i = 0; i < 16; i++) {
+- int idx;
+-
+- for (idx = 0; idx < mp_irq_entries; idx++) {
+- struct mpc_config_intsrc *irq = mp_irqs + idx;
+-
+- /* Do we already have a mapping for this ISA IRQ? */
+- if (irq->mpc_srcbus == MP_ISA_BUS && irq->mpc_srcbusirq == i)
+- break;
+-
+- /* Do we already have a mapping for this IOAPIC pin */
+- if ((irq->mpc_dstapic == intsrc.mpc_dstapic) &&
+- (irq->mpc_dstirq == i))
+- break;
+- }
+-
+- if (idx != mp_irq_entries) {
+- printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
+- continue; /* IRQ already used */
+- }
+-
+- intsrc.mpc_irqtype = mp_INT;
+- intsrc.mpc_srcbusirq = i; /* Identity mapped */
+- intsrc.mpc_dstirq = i;
+-
+- Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, "
+- "%d-%d\n", intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
+- (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
+- intsrc.mpc_srcbusirq, intsrc.mpc_dstapic,
+- intsrc.mpc_dstirq);
+-
+- mp_irqs[mp_irq_entries] = intsrc;
+- if (++mp_irq_entries == MAX_IRQ_SOURCES)
+- panic("Max # of irq sources exceeded!\n");
+- }
+-}
+-
+-#define MAX_GSI_NUM 4096
+-#define IRQ_COMPRESSION_START 64
+-
+-int mp_register_gsi(u32 gsi, int triggering, int polarity)
+-{
+- int ioapic = -1;
+- int ioapic_pin = 0;
+- int idx, bit = 0;
+- static int pci_irq = IRQ_COMPRESSION_START;
+- /*
+- * Mapping between Global System Interrupts, which
+- * represent all possible interrupts, and IRQs
+- * assigned to actual devices.
+- */
+- static int gsi_to_irq[MAX_GSI_NUM];
+-
+- /* Don't set up the ACPI SCI because it's already set up */
+- if (acpi_gbl_FADT.sci_interrupt == gsi)
+- return gsi;
+-
+- ioapic = mp_find_ioapic(gsi);
+- if (ioapic < 0) {
+- printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
+- return gsi;
+- }
+-
+- ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
+-
+- if (ioapic_renumber_irq)
+- gsi = ioapic_renumber_irq(ioapic, gsi);
+-
+- /*
+- * Avoid pin reprogramming. PRTs typically include entries
+- * with redundant pin->gsi mappings (but unique PCI devices);
+- * we only program the IOAPIC on the first.
+- */
+- bit = ioapic_pin % 32;
+- idx = (ioapic_pin < 32) ? 0 : (ioapic_pin / 32);
+- if (idx > 3) {
+- printk(KERN_ERR "Invalid reference to IOAPIC pin "
+- "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
+- ioapic_pin);
+- return gsi;
+- }
+- if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
+- Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
+- mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
+- return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
+- }
+-
+- mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit);
+-
+- /*
+- * For GSI >= 64, use IRQ compression
+- */
+- if ((gsi >= IRQ_COMPRESSION_START)
+- && (triggering == ACPI_LEVEL_SENSITIVE)) {
+- /*
+- * For PCI devices assign IRQs in order, avoiding gaps
+- * due to unused I/O APIC pins.
+- */
+- int irq = gsi;
+- if (gsi < MAX_GSI_NUM) {
+- /*
+- * Retain the VIA chipset work-around (gsi > 15), but
+- * avoid a problem where the 8254 timer (IRQ0) is setup
+- * via an override (so it's not on pin 0 of the ioapic),
+- * and at the same time, the pin 0 interrupt is a PCI
+- * type. The gsi > 15 test could cause these two pins
+- * to be shared as IRQ0, and they are not shareable.
+- * So test for this condition, and if necessary, avoid
+- * the pin collision.
+- */
+- if (gsi > 15 || (gsi == 0 && !timer_uses_ioapic_pin_0))
+- gsi = pci_irq++;
+- /*
+- * Don't assign IRQ used by ACPI SCI
+- */
+- if (gsi == acpi_gbl_FADT.sci_interrupt)
+- gsi = pci_irq++;
+- gsi_to_irq[irq] = gsi;
+- } else {
+- printk(KERN_ERR "GSI %u is too high\n", gsi);
+- return gsi;
+- }
+- }
+-
+- io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
+- triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
+- polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
+- return gsi;
+-}
+-
+-#endif /* CONFIG_X86_IO_APIC */
+-#endif /* CONFIG_ACPI */
+--- a/arch/x86/kernel/mpparse_64-xen.c
++++ /dev/null
+@@ -1,879 +0,0 @@
+-/*
+- * Intel Multiprocessor Specification 1.1 and 1.4
+- * compliant MP-table parsing routines.
+- *
+- * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
+- * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
+- *
+- * Fixes
+- * Erich Boleyn : MP v1.4 and additional changes.
+- * Alan Cox : Added EBDA scanning
+- * Ingo Molnar : various cleanups and rewrites
+- * Maciej W. Rozycki: Bits for default MP configurations
+- * Paul Diefenbaugh: Added full ACPI support
+- */
+-
+-#include <linux/mm.h>
+-#include <linux/init.h>
+-#include <linux/delay.h>
+-#include <linux/bootmem.h>
+-#include <linux/kernel_stat.h>
+-#include <linux/mc146818rtc.h>
+-#include <linux/acpi.h>
+-#include <linux/module.h>
+-
+-#include <asm/smp.h>
+-#include <asm/mtrr.h>
+-#include <asm/mpspec.h>
+-#include <asm/pgalloc.h>
+-#include <asm/io_apic.h>
+-#include <asm/proto.h>
+-#include <asm/acpi.h>
+-
+-/* Have we found an MP table */
+-int smp_found_config;
+-
+-/*
+- * Various Linux-internal data structures created from the
+- * MP-table.
+- */
+-DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
+-int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
+-
+-static int mp_current_pci_id = 0;
+-/* I/O APIC entries */
+-struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
+-
+-/* # of MP IRQ source entries */
+-struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
+-
+-/* MP IRQ source entries */
+-int mp_irq_entries;
+-
+-int nr_ioapics;
+-unsigned long mp_lapic_addr = 0;
+-
+-
+-
+-/* Processor that is doing the boot up */
+-unsigned int boot_cpu_id = -1U;
+-EXPORT_SYMBOL(boot_cpu_id);
+-
+-/* Internal processor count */
+-unsigned int num_processors;
+-
+-unsigned disabled_cpus __cpuinitdata;
+-
+-/* Bitmask of physically existing CPUs */
+-physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
+-
+-#ifndef CONFIG_XEN
+-u16 x86_bios_cpu_apicid_init[NR_CPUS] __initdata
+- = { [0 ... NR_CPUS-1] = BAD_APICID };
+-void *x86_bios_cpu_apicid_early_ptr;
+-#endif
+-DEFINE_PER_CPU(u16, x86_bios_cpu_apicid) = BAD_APICID;
+-EXPORT_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
+-
+-
+-/*
+- * Intel MP BIOS table parsing routines:
+- */
+-
+-/*
+- * Checksum an MP configuration block.
+- */
+-
+-static int __init mpf_checksum(unsigned char *mp, int len)
+-{
+- int sum = 0;
+-
+- while (len--)
+- sum += *mp++;
+-
+- return sum & 0xFF;
+-}
+-
+-#ifndef CONFIG_XEN
+-static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
+-{
+- int cpu;
+- cpumask_t tmp_map;
+- char *bootup_cpu = "";
+-
+- if (!(m->mpc_cpuflag & CPU_ENABLED)) {
+- disabled_cpus++;
+- return;
+- }
+- if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
+- bootup_cpu = " (Bootup-CPU)";
+- boot_cpu_id = m->mpc_apicid;
+- }
+-
+- printk(KERN_INFO "Processor #%d%s\n", m->mpc_apicid, bootup_cpu);
+-
+- if (num_processors >= NR_CPUS) {
+- printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
+- " Processor ignored.\n", NR_CPUS);
+- return;
+- }
+-
+- num_processors++;
+- cpus_complement(tmp_map, cpu_present_map);
+- cpu = first_cpu(tmp_map);
+-
+- physid_set(m->mpc_apicid, phys_cpu_present_map);
+- if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
+- /*
+- * x86_bios_cpu_apicid is required to have processors listed
+- * in same order as logical cpu numbers. Hence the first
+- * entry is BSP, and so on.
+- */
+- cpu = 0;
+- }
+- /* are we being called early in kernel startup? */
+- if (x86_cpu_to_apicid_early_ptr) {
+- u16 *cpu_to_apicid = x86_cpu_to_apicid_early_ptr;
+- u16 *bios_cpu_apicid = x86_bios_cpu_apicid_early_ptr;
+-
+- cpu_to_apicid[cpu] = m->mpc_apicid;
+- bios_cpu_apicid[cpu] = m->mpc_apicid;
+- } else {
+- per_cpu(x86_cpu_to_apicid, cpu) = m->mpc_apicid;
+- per_cpu(x86_bios_cpu_apicid, cpu) = m->mpc_apicid;
+- }
+-
+- cpu_set(cpu, cpu_possible_map);
+- cpu_set(cpu, cpu_present_map);
+-}
+-#else
+-static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
+-{
+- num_processors++;
+-}
+-#endif /* CONFIG_XEN */
+-
+-static void __init MP_bus_info (struct mpc_config_bus *m)
+-{
+- char str[7];
+-
+- memcpy(str, m->mpc_bustype, 6);
+- str[6] = 0;
+- Dprintk("Bus #%d is %s\n", m->mpc_busid, str);
+-
+- if (strncmp(str, "ISA", 3) == 0) {
+- set_bit(m->mpc_busid, mp_bus_not_pci);
+- } else if (strncmp(str, "PCI", 3) == 0) {
+- clear_bit(m->mpc_busid, mp_bus_not_pci);
+- mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
+- mp_current_pci_id++;
+- } else {
+- printk(KERN_ERR "Unknown bustype %s\n", str);
+- }
+-}
+-
+-static int bad_ioapic(unsigned long address)
+-{
+- if (nr_ioapics >= MAX_IO_APICS) {
+- printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
+- "(found %d)\n", MAX_IO_APICS, nr_ioapics);
+- panic("Recompile kernel with bigger MAX_IO_APICS!\n");
+- }
+- if (!address) {
+- printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
+- " found in table, skipping!\n");
+- return 1;
+- }
+- return 0;
+-}
+-
+-static void __init MP_ioapic_info (struct mpc_config_ioapic *m)
+-{
+- if (!(m->mpc_flags & MPC_APIC_USABLE))
+- return;
+-
+- printk("I/O APIC #%d at 0x%X.\n",
+- m->mpc_apicid, m->mpc_apicaddr);
+-
+- if (bad_ioapic(m->mpc_apicaddr))
+- return;
+-
+- mp_ioapics[nr_ioapics] = *m;
+- nr_ioapics++;
+-}
+-
+-static void __init MP_intsrc_info (struct mpc_config_intsrc *m)
+-{
+- mp_irqs [mp_irq_entries] = *m;
+- Dprintk("Int: type %d, pol %d, trig %d, bus %d,"
+- " IRQ %02x, APIC ID %x, APIC INT %02x\n",
+- m->mpc_irqtype, m->mpc_irqflag & 3,
+- (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
+- m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
+- if (++mp_irq_entries >= MAX_IRQ_SOURCES)
+- panic("Max # of irq sources exceeded!!\n");
+-}
+-
+-static void __init MP_lintsrc_info (struct mpc_config_lintsrc *m)
+-{
+- Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
+- " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
+- m->mpc_irqtype, m->mpc_irqflag & 3,
+- (m->mpc_irqflag >> 2) &3, m->mpc_srcbusid,
+- m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
+-}
+-
+-/*
+- * Read/parse the MPC
+- */
+-
+-static int __init smp_read_mpc(struct mp_config_table *mpc)
+-{
+- char str[16];
+- int count=sizeof(*mpc);
+- unsigned char *mpt=((unsigned char *)mpc)+count;
+-
+- if (memcmp(mpc->mpc_signature,MPC_SIGNATURE,4)) {
+- printk("MPTABLE: bad signature [%c%c%c%c]!\n",
+- mpc->mpc_signature[0],
+- mpc->mpc_signature[1],
+- mpc->mpc_signature[2],
+- mpc->mpc_signature[3]);
+- return 0;
+- }
+- if (mpf_checksum((unsigned char *)mpc,mpc->mpc_length)) {
+- printk("MPTABLE: checksum error!\n");
+- return 0;
+- }
+- if (mpc->mpc_spec!=0x01 && mpc->mpc_spec!=0x04) {
+- printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
+- mpc->mpc_spec);
+- return 0;
+- }
+- if (!mpc->mpc_lapic) {
+- printk(KERN_ERR "MPTABLE: null local APIC address!\n");
+- return 0;
+- }
+- memcpy(str,mpc->mpc_oem,8);
+- str[8] = 0;
+- printk(KERN_INFO "MPTABLE: OEM ID: %s ",str);
+-
+- memcpy(str,mpc->mpc_productid,12);
+- str[12] = 0;
+- printk("MPTABLE: Product ID: %s ",str);
+-
+- printk("MPTABLE: APIC at: 0x%X\n",mpc->mpc_lapic);
+-
+- /* save the local APIC address, it might be non-default */
+- if (!acpi_lapic)
+- mp_lapic_addr = mpc->mpc_lapic;
+-
+- /*
+- * Now process the configuration blocks.
+- */
+- while (count < mpc->mpc_length) {
+- switch(*mpt) {
+- case MP_PROCESSOR:
+- {
+- struct mpc_config_processor *m=
+- (struct mpc_config_processor *)mpt;
+- if (!acpi_lapic)
+- MP_processor_info(m);
+- mpt += sizeof(*m);
+- count += sizeof(*m);
+- break;
+- }
+- case MP_BUS:
+- {
+- struct mpc_config_bus *m=
+- (struct mpc_config_bus *)mpt;
+- MP_bus_info(m);
+- mpt += sizeof(*m);
+- count += sizeof(*m);
+- break;
+- }
+- case MP_IOAPIC:
+- {
+- struct mpc_config_ioapic *m=
+- (struct mpc_config_ioapic *)mpt;
+- MP_ioapic_info(m);
+- mpt += sizeof(*m);
+- count += sizeof(*m);
+- break;
+- }
+- case MP_INTSRC:
+- {
+- struct mpc_config_intsrc *m=
+- (struct mpc_config_intsrc *)mpt;
+-
+- MP_intsrc_info(m);
+- mpt += sizeof(*m);
+- count += sizeof(*m);
+- break;
+- }
+- case MP_LINTSRC:
+- {
+- struct mpc_config_lintsrc *m=
+- (struct mpc_config_lintsrc *)mpt;
+- MP_lintsrc_info(m);
+- mpt += sizeof(*m);
+- count += sizeof(*m);
+- break;
+- }
+- }
+- }
+- setup_apic_routing();
+- if (!num_processors)
+- printk(KERN_ERR "MPTABLE: no processors registered!\n");
+- return num_processors;
+-}
+-
+-static int __init ELCR_trigger(unsigned int irq)
+-{
+- unsigned int port;
+-
+- port = 0x4d0 + (irq >> 3);
+- return (inb(port) >> (irq & 7)) & 1;
+-}
+-
+-static void __init construct_default_ioirq_mptable(int mpc_default_type)
+-{
+- struct mpc_config_intsrc intsrc;
+- int i;
+- int ELCR_fallback = 0;
+-
+- intsrc.mpc_type = MP_INTSRC;
+- intsrc.mpc_irqflag = 0; /* conforming */
+- intsrc.mpc_srcbus = 0;
+- intsrc.mpc_dstapic = mp_ioapics[0].mpc_apicid;
+-
+- intsrc.mpc_irqtype = mp_INT;
+-
+- /*
+- * If true, we have an ISA/PCI system with no IRQ entries
+- * in the MP table. To prevent the PCI interrupts from being set up
+- * incorrectly, we try to use the ELCR. The sanity check to see if
+- * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
+- * never be level sensitive, so we simply see if the ELCR agrees.
+- * If it does, we assume it's valid.
+- */
+- if (mpc_default_type == 5) {
+- printk(KERN_INFO "ISA/PCI bus type with no IRQ information... falling back to ELCR\n");
+-
+- if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) || ELCR_trigger(13))
+- printk(KERN_ERR "ELCR contains invalid data... not using ELCR\n");
+- else {
+- printk(KERN_INFO "Using ELCR to identify PCI interrupts\n");
+- ELCR_fallback = 1;
+- }
+- }
+-
+- for (i = 0; i < 16; i++) {
+- switch (mpc_default_type) {
+- case 2:
+- if (i == 0 || i == 13)
+- continue; /* IRQ0 & IRQ13 not connected */
+- /* fall through */
+- default:
+- if (i == 2)
+- continue; /* IRQ2 is never connected */
+- }
+-
+- if (ELCR_fallback) {
+- /*
+- * If the ELCR indicates a level-sensitive interrupt, we
+- * copy that information over to the MP table in the
+- * irqflag field (level sensitive, active high polarity).
+- */
+- if (ELCR_trigger(i))
+- intsrc.mpc_irqflag = 13;
+- else
+- intsrc.mpc_irqflag = 0;
+- }
+-
+- intsrc.mpc_srcbusirq = i;
+- intsrc.mpc_dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
+- MP_intsrc_info(&intsrc);
+- }
+-
+- intsrc.mpc_irqtype = mp_ExtINT;
+- intsrc.mpc_srcbusirq = 0;
+- intsrc.mpc_dstirq = 0; /* 8259A to INTIN0 */
+- MP_intsrc_info(&intsrc);
+-}
+-
+-static inline void __init construct_default_ISA_mptable(int mpc_default_type)
+-{
+- struct mpc_config_processor processor;
+- struct mpc_config_bus bus;
+- struct mpc_config_ioapic ioapic;
+- struct mpc_config_lintsrc lintsrc;
+- int linttypes[2] = { mp_ExtINT, mp_NMI };
+- int i;
+-
+- /*
+- * local APIC has default address
+- */
+- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
+-
+- /*
+- * 2 CPUs, numbered 0 & 1.
+- */
+- processor.mpc_type = MP_PROCESSOR;
+- processor.mpc_apicver = 0;
+- processor.mpc_cpuflag = CPU_ENABLED;
+- processor.mpc_cpufeature = 0;
+- processor.mpc_featureflag = 0;
+- processor.mpc_reserved[0] = 0;
+- processor.mpc_reserved[1] = 0;
+- for (i = 0; i < 2; i++) {
+- processor.mpc_apicid = i;
+- MP_processor_info(&processor);
+- }
+-
+- bus.mpc_type = MP_BUS;
+- bus.mpc_busid = 0;
+- switch (mpc_default_type) {
+- default:
+- printk(KERN_ERR "???\nUnknown standard configuration %d\n",
+- mpc_default_type);
+- /* fall through */
+- case 1:
+- case 5:
+- memcpy(bus.mpc_bustype, "ISA ", 6);
+- break;
+- }
+- MP_bus_info(&bus);
+- if (mpc_default_type > 4) {
+- bus.mpc_busid = 1;
+- memcpy(bus.mpc_bustype, "PCI ", 6);
+- MP_bus_info(&bus);
+- }
+-
+- ioapic.mpc_type = MP_IOAPIC;
+- ioapic.mpc_apicid = 2;
+- ioapic.mpc_apicver = 0;
+- ioapic.mpc_flags = MPC_APIC_USABLE;
+- ioapic.mpc_apicaddr = 0xFEC00000;
+- MP_ioapic_info(&ioapic);
+-
+- /*
+- * We set up most of the low 16 IO-APIC pins according to MPS rules.
+- */
+- construct_default_ioirq_mptable(mpc_default_type);
+-
+- lintsrc.mpc_type = MP_LINTSRC;
+- lintsrc.mpc_irqflag = 0; /* conforming */
+- lintsrc.mpc_srcbusid = 0;
+- lintsrc.mpc_srcbusirq = 0;
+- lintsrc.mpc_destapic = MP_APIC_ALL;
+- for (i = 0; i < 2; i++) {
+- lintsrc.mpc_irqtype = linttypes[i];
+- lintsrc.mpc_destapiclint = i;
+- MP_lintsrc_info(&lintsrc);
+- }
+-}
+-
+-static struct intel_mp_floating *mpf_found;
+-
+-/*
+- * Scan the memory blocks for an SMP configuration block.
+- */
+-void __init get_smp_config (void)
+-{
+- struct intel_mp_floating *mpf = mpf_found;
+-
+- /*
+- * ACPI supports both logical (e.g. Hyper-Threading) and physical
+- * processors, where MPS only supports physical.
+- */
+- if (acpi_lapic && acpi_ioapic) {
+- printk(KERN_INFO "Using ACPI (MADT) for SMP configuration information\n");
+- return;
+- }
+- else if (acpi_lapic)
+- printk(KERN_INFO "Using ACPI for processor (LAPIC) configuration information\n");
+-
+- printk("Intel MultiProcessor Specification v1.%d\n", mpf->mpf_specification);
+-
+- /*
+- * Now see if we need to read further.
+- */
+- if (mpf->mpf_feature1 != 0) {
+-
+- printk(KERN_INFO "Default MP configuration #%d\n", mpf->mpf_feature1);
+- construct_default_ISA_mptable(mpf->mpf_feature1);
+-
+- } else if (mpf->mpf_physptr) {
+-
+- /*
+- * Read the physical hardware table. Anything here will
+- * override the defaults.
+- */
+- if (!smp_read_mpc(isa_bus_to_virt(mpf->mpf_physptr))) {
+- smp_found_config = 0;
+- printk(KERN_ERR "BIOS bug, MP table errors detected!...\n");
+- printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
+- return;
+- }
+- /*
+- * If there are no explicit MP IRQ entries, then we are
+- * broken. We set up most of the low 16 IO-APIC pins to
+- * ISA defaults and hope it will work.
+- */
+- if (!mp_irq_entries) {
+- struct mpc_config_bus bus;
+-
+- printk(KERN_ERR "BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n");
+-
+- bus.mpc_type = MP_BUS;
+- bus.mpc_busid = 0;
+- memcpy(bus.mpc_bustype, "ISA ", 6);
+- MP_bus_info(&bus);
+-
+- construct_default_ioirq_mptable(0);
+- }
+-
+- } else
+- BUG();
+-
+- printk(KERN_INFO "Processors: %d\n", num_processors);
+- /*
+- * Only use the first configuration found.
+- */
+-}
+-
+-static int __init smp_scan_config (unsigned long base, unsigned long length)
+-{
+- extern void __bad_mpf_size(void);
+- unsigned int *bp = isa_bus_to_virt(base);
+- struct intel_mp_floating *mpf;
+-
+- Dprintk("Scan SMP from %p for %ld bytes.\n", bp,length);
+- if (sizeof(*mpf) != 16)
+- __bad_mpf_size();
+-
+- while (length > 0) {
+- mpf = (struct intel_mp_floating *)bp;
+- if ((*bp == SMP_MAGIC_IDENT) &&
+- (mpf->mpf_length == 1) &&
+- !mpf_checksum((unsigned char *)bp, 16) &&
+- ((mpf->mpf_specification == 1)
+- || (mpf->mpf_specification == 4)) ) {
+-
+- smp_found_config = 1;
+- mpf_found = mpf;
+- return 1;
+- }
+- bp += 4;
+- length -= 16;
+- }
+- return 0;
+-}
+-
+-void __init find_smp_config(void)
+-{
+- unsigned int address;
+-
+- /*
+- * FIXME: Linux assumes you have 640K of base ram..
+- * this continues the error...
+- *
+- * 1) Scan the bottom 1K for a signature
+- * 2) Scan the top 1K of base RAM
+- * 3) Scan the 64K of bios
+- */
+- if (smp_scan_config(0x0,0x400) ||
+- smp_scan_config(639*0x400,0x400) ||
+- smp_scan_config(0xF0000,0x10000))
+- return;
+- /*
+- * If it is an SMP machine we should know now.
+- *
+- * there is a real-mode segmented pointer pointing to the
+- * 4K EBDA area at 0x40E, calculate and scan it here.
+- *
+- * NOTE! There are Linux loaders that will corrupt the EBDA
+- * area, and as such this kind of SMP config may be less
+- * trustworthy, simply because the SMP table may have been
+- * stomped on during early boot. These loaders are buggy and
+- * should be fixed.
+- */
+-
+- address = *(unsigned short *)phys_to_virt(0x40E);
+- address <<= 4;
+- if (smp_scan_config(address, 0x1000))
+- return;
+-
+- /* If we have come this far, we did not find an MP table */
+- printk(KERN_INFO "No mptable found.\n");
+-}
+-
+-/* --------------------------------------------------------------------------
+- ACPI-based MP Configuration
+- -------------------------------------------------------------------------- */
+-
+-#ifdef CONFIG_ACPI
+-
+-void __init mp_register_lapic_address(u64 address)
+-{
+-#ifndef CONFIG_XEN
+- mp_lapic_addr = (unsigned long) address;
+- set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
+- if (boot_cpu_id == -1U)
+- boot_cpu_id = GET_APIC_ID(apic_read(APIC_ID));
+-#endif
+-}
+-
+-void __cpuinit mp_register_lapic (u8 id, u8 enabled)
+-{
+- struct mpc_config_processor processor;
+- int boot_cpu = 0;
+-
+- if (id == boot_cpu_id)
+- boot_cpu = 1;
+-
+-#ifndef CONFIG_XEN
+- processor.mpc_type = MP_PROCESSOR;
+- processor.mpc_apicid = id;
+- processor.mpc_apicver = 0;
+- processor.mpc_cpuflag = (enabled ? CPU_ENABLED : 0);
+- processor.mpc_cpuflag |= (boot_cpu ? CPU_BOOTPROCESSOR : 0);
+- processor.mpc_cpufeature = 0;
+- processor.mpc_featureflag = 0;
+- processor.mpc_reserved[0] = 0;
+- processor.mpc_reserved[1] = 0;
+-#endif
+-
+- MP_processor_info(&processor);
+-}
+-
+-#define MP_ISA_BUS 0
+-#define MP_MAX_IOAPIC_PIN 127
+-
+-static struct mp_ioapic_routing {
+- int apic_id;
+- int gsi_start;
+- int gsi_end;
+- u32 pin_programmed[4];
+-} mp_ioapic_routing[MAX_IO_APICS];
+-
+-static int mp_find_ioapic(int gsi)
+-{
+- int i = 0;
+-
+- /* Find the IOAPIC that manages this GSI. */
+- for (i = 0; i < nr_ioapics; i++) {
+- if ((gsi >= mp_ioapic_routing[i].gsi_start)
+- && (gsi <= mp_ioapic_routing[i].gsi_end))
+- return i;
+- }
+-
+- printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
+- return -1;
+-}
+-
+-static u8 uniq_ioapic_id(u8 id)
+-{
+- int i;
+- DECLARE_BITMAP(used, 256);
+- bitmap_zero(used, 256);
+- for (i = 0; i < nr_ioapics; i++) {
+- struct mpc_config_ioapic *ia = &mp_ioapics[i];
+- __set_bit(ia->mpc_apicid, used);
+- }
+- if (!test_bit(id, used))
+- return id;
+- return find_first_zero_bit(used, 256);
+-}
+-
+-void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
+-{
+- int idx = 0;
+-
+- if (bad_ioapic(address))
+- return;
+-
+- idx = nr_ioapics;
+-
+- mp_ioapics[idx].mpc_type = MP_IOAPIC;
+- mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
+- mp_ioapics[idx].mpc_apicaddr = address;
+-
+-#ifndef CONFIG_XEN
+- set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
+-#endif
+- mp_ioapics[idx].mpc_apicid = uniq_ioapic_id(id);
+- mp_ioapics[idx].mpc_apicver = 0;
+-
+- /*
+- * Build basic IRQ lookup table to facilitate gsi->io_apic lookups
+- * and to prevent reprogramming of IOAPIC pins (PCI IRQs).
+- */
+- mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid;
+- mp_ioapic_routing[idx].gsi_start = gsi_base;
+- mp_ioapic_routing[idx].gsi_end = gsi_base +
+- io_apic_get_redir_entries(idx);
+-
+- printk(KERN_INFO "IOAPIC[%d]: apic_id %d, address 0x%x, "
+- "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
+- mp_ioapics[idx].mpc_apicaddr,
+- mp_ioapic_routing[idx].gsi_start,
+- mp_ioapic_routing[idx].gsi_end);
+-
+- nr_ioapics++;
+-}
+-
+-void __init
+-mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
+-{
+- struct mpc_config_intsrc intsrc;
+- int ioapic = -1;
+- int pin = -1;
+-
+- /*
+- * Convert 'gsi' to 'ioapic.pin'.
+- */
+- ioapic = mp_find_ioapic(gsi);
+- if (ioapic < 0)
+- return;
+- pin = gsi - mp_ioapic_routing[ioapic].gsi_start;
+-
+- /*
+- * TBD: This check is for faulty timer entries, where the override
+- * erroneously sets the trigger to level, resulting in a HUGE
+- * increase of timer interrupts!
+- */
+- if ((bus_irq == 0) && (trigger == 3))
+- trigger = 1;
+-
+- intsrc.mpc_type = MP_INTSRC;
+- intsrc.mpc_irqtype = mp_INT;
+- intsrc.mpc_irqflag = (trigger << 2) | polarity;
+- intsrc.mpc_srcbus = MP_ISA_BUS;
+- intsrc.mpc_srcbusirq = bus_irq; /* IRQ */
+- intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; /* APIC ID */
+- intsrc.mpc_dstirq = pin; /* INTIN# */
+-
+- Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, %d-%d\n",
+- intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
+- (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
+- intsrc.mpc_srcbusirq, intsrc.mpc_dstapic, intsrc.mpc_dstirq);
+-
+- mp_irqs[mp_irq_entries] = intsrc;
+- if (++mp_irq_entries == MAX_IRQ_SOURCES)
+- panic("Max # of irq sources exceeded!\n");
+-}
+-
+-void __init mp_config_acpi_legacy_irqs(void)
+-{
+- struct mpc_config_intsrc intsrc;
+- int i = 0;
+- int ioapic = -1;
+-
+- /*
+- * Fabricate the legacy ISA bus (bus #31).
+- */
+- set_bit(MP_ISA_BUS, mp_bus_not_pci);
+-
+- /*
+- * Locate the IOAPIC that manages the ISA IRQs (0-15).
+- */
+- ioapic = mp_find_ioapic(0);
+- if (ioapic < 0)
+- return;
+-
+- intsrc.mpc_type = MP_INTSRC;
+- intsrc.mpc_irqflag = 0; /* Conforming */
+- intsrc.mpc_srcbus = MP_ISA_BUS;
+- intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid;
+-
+- /*
+- * Use the default configuration for the IRQs 0-15. Unless
+- * overridden by (MADT) interrupt source override entries.
+- */
+- for (i = 0; i < 16; i++) {
+- int idx;
+-
+- for (idx = 0; idx < mp_irq_entries; idx++) {
+- struct mpc_config_intsrc *irq = mp_irqs + idx;
+-
+- /* Do we already have a mapping for this ISA IRQ? */
+- if (irq->mpc_srcbus == MP_ISA_BUS && irq->mpc_srcbusirq == i)
+- break;
+-
+- /* Do we already have a mapping for this IOAPIC pin */
+- if ((irq->mpc_dstapic == intsrc.mpc_dstapic) &&
+- (irq->mpc_dstirq == i))
+- break;
+- }
+-
+- if (idx != mp_irq_entries) {
+- printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
+- continue; /* IRQ already used */
+- }
+-
+- intsrc.mpc_irqtype = mp_INT;
+- intsrc.mpc_srcbusirq = i; /* Identity mapped */
+- intsrc.mpc_dstirq = i;
+-
+- Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, "
+- "%d-%d\n", intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
+- (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
+- intsrc.mpc_srcbusirq, intsrc.mpc_dstapic,
+- intsrc.mpc_dstirq);
+-
+- mp_irqs[mp_irq_entries] = intsrc;
+- if (++mp_irq_entries == MAX_IRQ_SOURCES)
+- panic("Max # of irq sources exceeded!\n");
+- }
+-}
+-
+-int mp_register_gsi(u32 gsi, int triggering, int polarity)
+-{
+- int ioapic = -1;
+- int ioapic_pin = 0;
+- int idx, bit = 0;
+-
+- if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
+- return gsi;
+-
+- /* Don't set up the ACPI SCI because it's already set up */
+- if (acpi_gbl_FADT.sci_interrupt == gsi)
+- return gsi;
+-
+- ioapic = mp_find_ioapic(gsi);
+- if (ioapic < 0) {
+- printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
+- return gsi;
+- }
+-
+- ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_start;
+-
+- /*
+- * Avoid pin reprogramming. PRTs typically include entries
+- * with redundant pin->gsi mappings (but unique PCI devices);
+- * we only program the IOAPIC on the first.
+- */
+- bit = ioapic_pin % 32;
+- idx = (ioapic_pin < 32) ? 0 : (ioapic_pin / 32);
+- if (idx > 3) {
+- printk(KERN_ERR "Invalid reference to IOAPIC pin "
+- "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
+- ioapic_pin);
+- return gsi;
+- }
+- if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
+- Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
+- mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
+- return gsi;
+- }
+-
+- mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit);
+-
+- io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
+- triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
+- polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
+- return gsi;
+-}
+-#endif /*CONFIG_ACPI*/
+--- /dev/null
++++ b/arch/x86/kernel/mpparse-xen.c
+@@ -0,0 +1,1104 @@
++/*
++ * Intel Multiprocessor Specification 1.1 and 1.4
++ * compliant MP-table parsing routines.
++ *
++ * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
++ * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
++ * (c) 2008 Alexey Starikovskiy <astarikovskiy@suse.de>
++ */
++
++#include <linux/mm.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/bootmem.h>
++#include <linux/kernel_stat.h>
++#include <linux/mc146818rtc.h>
++#include <linux/bitops.h>
++#include <linux/acpi.h>
++#include <linux/module.h>
++
++#include <asm/smp.h>
++#include <asm/mtrr.h>
++#include <asm/mpspec.h>
++#include <asm/pgalloc.h>
++#include <asm/io_apic.h>
++#include <asm/proto.h>
++#include <asm/acpi.h>
++#include <asm/bios_ebda.h>
++
++#include <mach_apic.h>
++#ifdef CONFIG_X86_32
++#include <mach_apicdef.h>
++#include <mach_mpparse.h>
++#endif
++
++/* Have we found an MP table */
++int smp_found_config;
++
++/*
++ * Various Linux-internal data structures created from the
++ * MP-table.
++ */
++#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
++int mp_bus_id_to_type[MAX_MP_BUSSES];
++#endif
++
++DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
++int mp_bus_id_to_pci_bus[MAX_MP_BUSSES] = {[0 ... MAX_MP_BUSSES - 1] = -1 };
++
++static int mp_current_pci_id;
++
++int pic_mode;
++
++/*
++ * Intel MP BIOS table parsing routines:
++ */
++
++/*
++ * Checksum an MP configuration block.
++ */
++
++static int __init mpf_checksum(unsigned char *mp, int len)
++{
++ int sum = 0;
++
++ while (len--)
++ sum += *mp++;
++
++ return sum & 0xFF;
++}
++
++#ifdef CONFIG_X86_NUMAQ
++/*
++ * Have to match translation table entries to main table entries by counter
++ * hence the mpc_record variable .... can't see a less disgusting way of
++ * doing this ....
++ */
++
++static int mpc_record;
++static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY]
++ __cpuinitdata;
++#endif
++
++#ifndef CONFIG_XEN
++static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
++{
++ int apicid;
++ char *bootup_cpu = "";
++
++ if (!(m->mpc_cpuflag & CPU_ENABLED)) {
++ disabled_cpus++;
++ return;
++ }
++#ifdef CONFIG_X86_NUMAQ
++ apicid = mpc_apic_id(m, translation_table[mpc_record]);
++#else
++ apicid = m->mpc_apicid;
++#endif
++ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
++ bootup_cpu = " (Bootup-CPU)";
++ boot_cpu_physical_apicid = m->mpc_apicid;
++ }
++
++ printk(KERN_INFO "Processor #%d%s\n", m->mpc_apicid, bootup_cpu);
++ generic_processor_info(apicid, m->mpc_apicver);
++}
++#else
++static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
++{
++ num_processors++;
++}
++#endif /* CONFIG_XEN */
++
++static void __init MP_bus_info(struct mpc_config_bus *m)
++{
++ char str[7];
++
++ memcpy(str, m->mpc_bustype, 6);
++ str[6] = 0;
++
++#ifdef CONFIG_X86_NUMAQ
++ mpc_oem_bus_info(m, str, translation_table[mpc_record]);
++#else
++ Dprintk("Bus #%d is %s\n", m->mpc_busid, str);
++#endif
++
++#if MAX_MP_BUSSES < 256
++ if (m->mpc_busid >= MAX_MP_BUSSES) {
++ printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
++ " is too large, max. supported is %d\n",
++ m->mpc_busid, str, MAX_MP_BUSSES - 1);
++ return;
++ }
++#endif
++
++ if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
++ set_bit(m->mpc_busid, mp_bus_not_pci);
++#if defined(CONFIG_EISA) || defined (CONFIG_MCA)
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
++#endif
++ } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
++#ifdef CONFIG_X86_NUMAQ
++ mpc_oem_pci_bus(m, translation_table[mpc_record]);
++#endif
++ clear_bit(m->mpc_busid, mp_bus_not_pci);
++ mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
++ mp_current_pci_id++;
++#if defined(CONFIG_EISA) || defined (CONFIG_MCA)
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI;
++ } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_EISA;
++ } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA) - 1) == 0) {
++ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
++#endif
++ } else
++ printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
++}
++
++#ifdef CONFIG_X86_IO_APIC
++
++static int bad_ioapic(unsigned long address)
++{
++ if (nr_ioapics >= MAX_IO_APICS) {
++ printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
++ "(found %d)\n", MAX_IO_APICS, nr_ioapics);
++ panic("Recompile kernel with bigger MAX_IO_APICS!\n");
++ }
++ if (!address) {
++ printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
++ " found in table, skipping!\n");
++ return 1;
++ }
++ return 0;
++}
++
++static void __init MP_ioapic_info(struct mpc_config_ioapic *m)
++{
++ if (!(m->mpc_flags & MPC_APIC_USABLE))
++ return;
++
++ printk(KERN_INFO "I/O APIC #%d Version %d at 0x%X.\n",
++ m->mpc_apicid, m->mpc_apicver, m->mpc_apicaddr);
++
++ if (bad_ioapic(m->mpc_apicaddr))
++ return;
++
++ mp_ioapics[nr_ioapics] = *m;
++ nr_ioapics++;
++}
++
++static void __init MP_intsrc_info(struct mpc_config_intsrc *m)
++{
++ mp_irqs[mp_irq_entries] = *m;
++ Dprintk("Int: type %d, pol %d, trig %d, bus %d,"
++ " IRQ %02x, APIC ID %x, APIC INT %02x\n",
++ m->mpc_irqtype, m->mpc_irqflag & 3,
++ (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
++ m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
++ if (++mp_irq_entries == MAX_IRQ_SOURCES)
++ panic("Max # of irq sources exceeded!!\n");
++}
++
++#endif
++
++static void __init MP_lintsrc_info(struct mpc_config_lintsrc *m)
++{
++ Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
++ " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
++ m->mpc_irqtype, m->mpc_irqflag & 3,
++ (m->mpc_irqflag >> 2) & 3, m->mpc_srcbusid,
++ m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
++}
++
++#ifdef CONFIG_X86_NUMAQ
++static void __init MP_translation_info(struct mpc_config_translation *m)
++{
++ printk(KERN_INFO
++ "Translation: record %d, type %d, quad %d, global %d, local %d\n",
++ mpc_record, m->trans_type, m->trans_quad, m->trans_global,
++ m->trans_local);
++
++ if (mpc_record >= MAX_MPC_ENTRY)
++ printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n");
++ else
++ translation_table[mpc_record] = m; /* stash this for later */
++ if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad))
++ node_set_online(m->trans_quad);
++}
++
++/*
++ * Read/parse the MPC oem tables
++ */
++
++static void __init smp_read_mpc_oem(struct mp_config_oemtable *oemtable,
++ unsigned short oemsize)
++{
++ int count = sizeof(*oemtable); /* the header size */
++ unsigned char *oemptr = ((unsigned char *)oemtable) + count;
++
++ mpc_record = 0;
++ printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n",
++ oemtable);
++ if (memcmp(oemtable->oem_signature, MPC_OEM_SIGNATURE, 4)) {
++ printk(KERN_WARNING
++ "SMP mpc oemtable: bad signature [%c%c%c%c]!\n",
++ oemtable->oem_signature[0], oemtable->oem_signature[1],
++ oemtable->oem_signature[2], oemtable->oem_signature[3]);
++ return;
++ }
++ if (mpf_checksum((unsigned char *)oemtable, oemtable->oem_length)) {
++ printk(KERN_WARNING "SMP oem mptable: checksum error!\n");
++ return;
++ }
++ while (count < oemtable->oem_length) {
++ switch (*oemptr) {
++ case MP_TRANSLATION:
++ {
++ struct mpc_config_translation *m =
++ (struct mpc_config_translation *)oemptr;
++ MP_translation_info(m);
++ oemptr += sizeof(*m);
++ count += sizeof(*m);
++ ++mpc_record;
++ break;
++ }
++ default:
++ {
++ printk(KERN_WARNING
++ "Unrecognised OEM table entry type! - %d\n",
++ (int)*oemptr);
++ return;
++ }
++ }
++ }
++}
++
++static inline void mps_oem_check(struct mp_config_table *mpc, char *oem,
++ char *productid)
++{
++ if (strncmp(oem, "IBM NUMA", 8))
++ printk("Warning! May not be a NUMA-Q system!\n");
++ if (mpc->mpc_oemptr)
++ smp_read_mpc_oem((struct mp_config_oemtable *)mpc->mpc_oemptr,
++ mpc->mpc_oemsize);
++}
++#endif /* CONFIG_X86_NUMAQ */
++
++/*
++ * Read/parse the MPC
++ */
++
++static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early)
++{
++ char str[16];
++ char oem[10];
++ int count = sizeof(*mpc);
++ unsigned char *mpt = ((unsigned char *)mpc) + count;
++
++ if (memcmp(mpc->mpc_signature, MPC_SIGNATURE, 4)) {
++ printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n",
++ mpc->mpc_signature[0], mpc->mpc_signature[1],
++ mpc->mpc_signature[2], mpc->mpc_signature[3]);
++ return 0;
++ }
++ if (mpf_checksum((unsigned char *)mpc, mpc->mpc_length)) {
++ printk(KERN_ERR "MPTABLE: checksum error!\n");
++ return 0;
++ }
++ if (mpc->mpc_spec != 0x01 && mpc->mpc_spec != 0x04) {
++ printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
++ mpc->mpc_spec);
++ return 0;
++ }
++ if (!mpc->mpc_lapic) {
++ printk(KERN_ERR "MPTABLE: null local APIC address!\n");
++ return 0;
++ }
++ memcpy(oem, mpc->mpc_oem, 8);
++ oem[8] = 0;
++ printk(KERN_INFO "MPTABLE: OEM ID: %s ", oem);
++
++ memcpy(str, mpc->mpc_productid, 12);
++ str[12] = 0;
++ printk("Product ID: %s ", str);
++
++#ifdef CONFIG_X86_32
++ mps_oem_check(mpc, oem, str);
++#endif
++ printk(KERN_INFO "MPTABLE: Product ID: %s ", str);
++
++ printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->mpc_lapic);
++
++ /* save the local APIC address, it might be non-default */
++ if (!acpi_lapic)
++ mp_lapic_addr = mpc->mpc_lapic;
++
++ if (early)
++ return 1;
++
++ /*
++ * Now process the configuration blocks.
++ */
++#ifdef CONFIG_X86_NUMAQ
++ mpc_record = 0;
++#endif
++ while (count < mpc->mpc_length) {
++ switch (*mpt) {
++ case MP_PROCESSOR:
++ {
++ struct mpc_config_processor *m =
++ (struct mpc_config_processor *)mpt;
++ /* ACPI may have already provided this data */
++ if (!acpi_lapic)
++ MP_processor_info(m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ case MP_BUS:
++ {
++ struct mpc_config_bus *m =
++ (struct mpc_config_bus *)mpt;
++ MP_bus_info(m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ case MP_IOAPIC:
++ {
++#ifdef CONFIG_X86_IO_APIC
++ struct mpc_config_ioapic *m =
++ (struct mpc_config_ioapic *)mpt;
++ MP_ioapic_info(m);
++#endif
++ mpt += sizeof(struct mpc_config_ioapic);
++ count += sizeof(struct mpc_config_ioapic);
++ break;
++ }
++ case MP_INTSRC:
++ {
++#ifdef CONFIG_X86_IO_APIC
++ struct mpc_config_intsrc *m =
++ (struct mpc_config_intsrc *)mpt;
++
++ MP_intsrc_info(m);
++#endif
++ mpt += sizeof(struct mpc_config_intsrc);
++ count += sizeof(struct mpc_config_intsrc);
++ break;
++ }
++ case MP_LINTSRC:
++ {
++ struct mpc_config_lintsrc *m =
++ (struct mpc_config_lintsrc *)mpt;
++ MP_lintsrc_info(m);
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ default:
++ /* wrong mptable */
++ printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n");
++ printk(KERN_ERR "type %x\n", *mpt);
++ print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16,
++ 1, mpc, mpc->mpc_length, 1);
++ count = mpc->mpc_length;
++ break;
++ }
++#ifdef CONFIG_X86_NUMAQ
++ ++mpc_record;
++#endif
++ }
++ setup_apic_routing();
++ if (!num_processors)
++ printk(KERN_ERR "MPTABLE: no processors registered!\n");
++ return num_processors;
++}
++
++#ifdef CONFIG_X86_IO_APIC
++
++static int __init ELCR_trigger(unsigned int irq)
++{
++ unsigned int port;
++
++ port = 0x4d0 + (irq >> 3);
++ return (inb(port) >> (irq & 7)) & 1;
++}
++
++static void __init construct_default_ioirq_mptable(int mpc_default_type)
++{
++ struct mpc_config_intsrc intsrc;
++ int i;
++ int ELCR_fallback = 0;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqflag = 0; /* conforming */
++ intsrc.mpc_srcbus = 0;
++ intsrc.mpc_dstapic = mp_ioapics[0].mpc_apicid;
++
++ intsrc.mpc_irqtype = mp_INT;
++
++ /*
++ * If true, we have an ISA/PCI system with no IRQ entries
++ * in the MP table. To prevent the PCI interrupts from being set up
++ * incorrectly, we try to use the ELCR. The sanity check to see if
++ * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
++ * never be level sensitive, so we simply see if the ELCR agrees.
++ * If it does, we assume it's valid.
++ */
++ if (mpc_default_type == 5) {
++ printk(KERN_INFO "ISA/PCI bus type with no IRQ information... "
++ "falling back to ELCR\n");
++
++ if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
++ ELCR_trigger(13))
++ printk(KERN_ERR "ELCR contains invalid data... "
++ "not using ELCR\n");
++ else {
++ printk(KERN_INFO
++ "Using ELCR to identify PCI interrupts\n");
++ ELCR_fallback = 1;
++ }
++ }
++
++ for (i = 0; i < 16; i++) {
++ switch (mpc_default_type) {
++ case 2:
++ if (i == 0 || i == 13)
++ continue; /* IRQ0 & IRQ13 not connected */
++ /* fall through */
++ default:
++ if (i == 2)
++ continue; /* IRQ2 is never connected */
++ }
++
++ if (ELCR_fallback) {
++ /*
++ * If the ELCR indicates a level-sensitive interrupt, we
++ * copy that information over to the MP table in the
++ * irqflag field (level sensitive, active high polarity).
++ */
++ if (ELCR_trigger(i))
++ intsrc.mpc_irqflag = 13;
++ else
++ intsrc.mpc_irqflag = 0;
++ }
++
++ intsrc.mpc_srcbusirq = i;
++ intsrc.mpc_dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
++ MP_intsrc_info(&intsrc);
++ }
++
++ intsrc.mpc_irqtype = mp_ExtINT;
++ intsrc.mpc_srcbusirq = 0;
++ intsrc.mpc_dstirq = 0; /* 8259A to INTIN0 */
++ MP_intsrc_info(&intsrc);
++}
++
++#endif
++
++static inline void __init construct_default_ISA_mptable(int mpc_default_type)
++{
++ struct mpc_config_processor processor;
++ struct mpc_config_bus bus;
++#ifdef CONFIG_X86_IO_APIC
++ struct mpc_config_ioapic ioapic;
++#endif
++ struct mpc_config_lintsrc lintsrc;
++ int linttypes[2] = { mp_ExtINT, mp_NMI };
++ int i;
++
++ /*
++ * local APIC has default address
++ */
++ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
++
++ /*
++ * 2 CPUs, numbered 0 & 1.
++ */
++ processor.mpc_type = MP_PROCESSOR;
++ /* Either an integrated APIC or a discrete 82489DX. */
++ processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ processor.mpc_cpuflag = CPU_ENABLED;
++ processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
++ (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
++ processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
++ processor.mpc_reserved[0] = 0;
++ processor.mpc_reserved[1] = 0;
++ for (i = 0; i < 2; i++) {
++ processor.mpc_apicid = i;
++ MP_processor_info(&processor);
++ }
++
++ bus.mpc_type = MP_BUS;
++ bus.mpc_busid = 0;
++ switch (mpc_default_type) {
++ default:
++ printk(KERN_ERR "???\nUnknown standard configuration %d\n",
++ mpc_default_type);
++ /* fall through */
++ case 1:
++ case 5:
++ memcpy(bus.mpc_bustype, "ISA ", 6);
++ break;
++ case 2:
++ case 6:
++ case 3:
++ memcpy(bus.mpc_bustype, "EISA ", 6);
++ break;
++ case 4:
++ case 7:
++ memcpy(bus.mpc_bustype, "MCA ", 6);
++ }
++ MP_bus_info(&bus);
++ if (mpc_default_type > 4) {
++ bus.mpc_busid = 1;
++ memcpy(bus.mpc_bustype, "PCI ", 6);
++ MP_bus_info(&bus);
++ }
++
++#ifdef CONFIG_X86_IO_APIC
++ ioapic.mpc_type = MP_IOAPIC;
++ ioapic.mpc_apicid = 2;
++ ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ ioapic.mpc_flags = MPC_APIC_USABLE;
++ ioapic.mpc_apicaddr = 0xFEC00000;
++ MP_ioapic_info(&ioapic);
++
++ /*
++ * We set up most of the low 16 IO-APIC pins according to MPS rules.
++ */
++ construct_default_ioirq_mptable(mpc_default_type);
++#endif
++ lintsrc.mpc_type = MP_LINTSRC;
++ lintsrc.mpc_irqflag = 0; /* conforming */
++ lintsrc.mpc_srcbusid = 0;
++ lintsrc.mpc_srcbusirq = 0;
++ lintsrc.mpc_destapic = MP_APIC_ALL;
++ for (i = 0; i < 2; i++) {
++ lintsrc.mpc_irqtype = linttypes[i];
++ lintsrc.mpc_destapiclint = i;
++ MP_lintsrc_info(&lintsrc);
++ }
++}
++
++static struct intel_mp_floating *mpf_found;
++
++/*
++ * Scan the memory blocks for an SMP configuration block.
++ */
++static void __init __get_smp_config(unsigned early)
++{
++ struct intel_mp_floating *mpf = mpf_found;
++
++ if (acpi_lapic && early)
++ return;
++ /*
++ * ACPI supports both logical (e.g. Hyper-Threading) and physical
++ * processors, where MPS only supports physical.
++ */
++ if (acpi_lapic && acpi_ioapic) {
++ printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
++ "information\n");
++ return;
++ } else if (acpi_lapic)
++ printk(KERN_INFO "Using ACPI for processor (LAPIC) "
++ "configuration information\n");
++
++ printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n",
++ mpf->mpf_specification);
++#ifdef CONFIG_X86_32
++ if (mpf->mpf_feature2 & (1 << 7)) {
++ printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
++ pic_mode = 1;
++ } else {
++ printk(KERN_INFO " Virtual Wire compatibility mode.\n");
++ pic_mode = 0;
++ }
++#endif
++ /*
++ * Now see if we need to read further.
++ */
++ if (mpf->mpf_feature1 != 0) {
++ if (early) {
++ /*
++ * local APIC has default address
++ */
++ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
++ return;
++ }
++
++ printk(KERN_INFO "Default MP configuration #%d\n",
++ mpf->mpf_feature1);
++ construct_default_ISA_mptable(mpf->mpf_feature1);
++
++ } else if (mpf->mpf_physptr) {
++
++ /*
++ * Read the physical hardware table. Anything here will
++ * override the defaults.
++ */
++ if (!smp_read_mpc(isa_bus_to_virt(mpf->mpf_physptr), early)) {
++ smp_found_config = 0;
++ printk(KERN_ERR
++ "BIOS bug, MP table errors detected!...\n");
++ printk(KERN_ERR "... disabling SMP support. "
++ "(tell your hw vendor)\n");
++ return;
++ }
++
++ if (early)
++ return;
++#ifdef CONFIG_X86_IO_APIC
++ /*
++ * If there are no explicit MP IRQ entries, then we are
++ * broken. We set up most of the low 16 IO-APIC pins to
++ * ISA defaults and hope it will work.
++ */
++ if (!mp_irq_entries) {
++ struct mpc_config_bus bus;
++
++ printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
++ "using default mptable. "
++ "(tell your hw vendor)\n");
++
++ bus.mpc_type = MP_BUS;
++ bus.mpc_busid = 0;
++ memcpy(bus.mpc_bustype, "ISA ", 6);
++ MP_bus_info(&bus);
++
++ construct_default_ioirq_mptable(0);
++ }
++#endif
++ } else
++ BUG();
++
++ if (!early)
++ printk(KERN_INFO "Processors: %d\n", num_processors);
++ /*
++ * Only use the first configuration found.
++ */
++}
++
++void __init early_get_smp_config(void)
++{
++ __get_smp_config(1);
++}
++
++void __init get_smp_config(void)
++{
++ __get_smp_config(0);
++}
++
++static int __init smp_scan_config(unsigned long base, unsigned long length,
++ unsigned reserve)
++{
++ unsigned int *bp = isa_bus_to_virt(base);
++ struct intel_mp_floating *mpf;
++
++ Dprintk("Scan SMP from %p for %ld bytes.\n", bp, length);
++ BUILD_BUG_ON(sizeof(*mpf) != 16);
++
++ while (length > 0) {
++ mpf = (struct intel_mp_floating *)bp;
++ if ((*bp == SMP_MAGIC_IDENT) &&
++ (mpf->mpf_length == 1) &&
++ !mpf_checksum((unsigned char *)bp, 16) &&
++ ((mpf->mpf_specification == 1)
++ || (mpf->mpf_specification == 4))) {
++
++ smp_found_config = 1;
++ mpf_found = mpf;
++#ifdef CONFIG_X86_32
++#ifndef CONFIG_XEN
++ printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
++ mpf, virt_to_phys(mpf));
++ reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE,
++ BOOTMEM_DEFAULT);
++ if (mpf->mpf_physptr) {
++ /*
++ * We cannot access to MPC table to compute
++ * table size yet, as only few megabytes from
++ * the bottom is mapped now.
++ * PC-9800's MPC table places on the very last
++ * of physical memory; so that simply reserving
++ * PAGE_SIZE from mpg->mpf_physptr yields BUG()
++ * in reserve_bootmem.
++ */
++ unsigned long size = PAGE_SIZE;
++ unsigned long end = max_low_pfn * PAGE_SIZE;
++ if (mpf->mpf_physptr + size > end)
++ size = end - mpf->mpf_physptr;
++ reserve_bootmem(mpf->mpf_physptr, size,
++ BOOTMEM_DEFAULT);
++ }
++#else
++ printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
++ mpf, ((void *)bp - isa_bus_to_virt(base)) + base);
++#endif
++#elif !defined(CONFIG_XEN)
++ if (!reserve)
++ return 1;
++
++ reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE);
++ if (mpf->mpf_physptr)
++ reserve_bootmem_generic(mpf->mpf_physptr,
++ PAGE_SIZE);
++#endif
++ return 1;
++ }
++ bp += 4;
++ length -= 16;
++ }
++ return 0;
++}
++
++static void __init __find_smp_config(unsigned reserve)
++{
++#ifndef CONFIG_XEN
++ unsigned int address;
++#endif
++
++ /*
++ * FIXME: Linux assumes you have 640K of base ram..
++ * this continues the error...
++ *
++ * 1) Scan the bottom 1K for a signature
++ * 2) Scan the top 1K of base RAM
++ * 3) Scan the 64K of bios
++ */
++ if (smp_scan_config(0x0, 0x400, reserve) ||
++ smp_scan_config(639 * 0x400, 0x400, reserve) ||
++ smp_scan_config(0xF0000, 0x10000, reserve))
++ return;
++ /*
++ * If it is an SMP machine we should know now, unless the
++ * configuration is in an EISA/MCA bus machine with an
++ * extended bios data area.
++ *
++ * there is a real-mode segmented pointer pointing to the
++ * 4K EBDA area at 0x40E, calculate and scan it here.
++ *
++ * NOTE! There are Linux loaders that will corrupt the EBDA
++ * area, and as such this kind of SMP config may be less
++ * trustworthy, simply because the SMP table may have been
++ * stomped on during early boot. These loaders are buggy and
++ * should be fixed.
++ *
++ * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
++ */
++
++#ifndef CONFIG_XEN
++ address = get_bios_ebda();
++ if (address)
++ smp_scan_config(address, 0x400, reserve);
++#endif
++}
++
++void __init early_find_smp_config(void)
++{
++ __find_smp_config(0);
++}
++
++void __init find_smp_config(void)
++{
++ __find_smp_config(1);
++}
++
++/* --------------------------------------------------------------------------
++ ACPI-based MP Configuration
++ -------------------------------------------------------------------------- */
++
++/*
++ * Keep this outside and initialized to 0, for !CONFIG_ACPI builds:
++ */
++int es7000_plat;
++
++#ifdef CONFIG_ACPI
++
++#ifdef CONFIG_X86_IO_APIC
++
++#define MP_ISA_BUS 0
++
++extern struct mp_ioapic_routing mp_ioapic_routing[MAX_IO_APICS];
++
++static int mp_find_ioapic(int gsi)
++{
++ int i = 0;
++
++ /* Find the IOAPIC that manages this GSI. */
++ for (i = 0; i < nr_ioapics; i++) {
++ if ((gsi >= mp_ioapic_routing[i].gsi_base)
++ && (gsi <= mp_ioapic_routing[i].gsi_end))
++ return i;
++ }
++
++ printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
++ return -1;
++}
++
++static u8 __init uniq_ioapic_id(u8 id)
++{
++#ifdef CONFIG_X86_32
++ if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
++ !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
++ return io_apic_get_unique_id(nr_ioapics, id);
++ else
++ return id;
++#else
++ int i;
++ DECLARE_BITMAP(used, 256);
++ bitmap_zero(used, 256);
++ for (i = 0; i < nr_ioapics; i++) {
++ struct mpc_config_ioapic *ia = &mp_ioapics[i];
++ __set_bit(ia->mpc_apicid, used);
++ }
++ if (!test_bit(id, used))
++ return id;
++ return find_first_zero_bit(used, 256);
++#endif
++}
++
++void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
++{
++ int idx = 0;
++
++ if (bad_ioapic(address))
++ return;
++
++ idx = nr_ioapics;
++
++ mp_ioapics[idx].mpc_type = MP_IOAPIC;
++ mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
++ mp_ioapics[idx].mpc_apicaddr = address;
++
++#ifndef CONFIG_XEN
++ set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
++#endif
++ mp_ioapics[idx].mpc_apicid = uniq_ioapic_id(id);
++#ifdef CONFIG_X86_32
++ mp_ioapics[idx].mpc_apicver = io_apic_get_version(idx);
++#else
++ mp_ioapics[idx].mpc_apicver = 0;
++#endif
++ /*
++ * Build basic GSI lookup table to facilitate gsi->io_apic lookups
++ * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
++ */
++ mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid;
++ mp_ioapic_routing[idx].gsi_base = gsi_base;
++ mp_ioapic_routing[idx].gsi_end = gsi_base +
++ io_apic_get_redir_entries(idx);
++
++ printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
++ "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
++ mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
++ mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
++
++ nr_ioapics++;
++}
++
++void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
++{
++ struct mpc_config_intsrc intsrc;
++ int ioapic = -1;
++ int pin = -1;
++
++ /*
++ * Convert 'gsi' to 'ioapic.pin'.
++ */
++ ioapic = mp_find_ioapic(gsi);
++ if (ioapic < 0)
++ return;
++ pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
++
++ /*
++ * TBD: This check is for faulty timer entries, where the override
++ * erroneously sets the trigger to level, resulting in a HUGE
++ * increase of timer interrupts!
++ */
++ if ((bus_irq == 0) && (trigger == 3))
++ trigger = 1;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqtype = mp_INT;
++ intsrc.mpc_irqflag = (trigger << 2) | polarity;
++ intsrc.mpc_srcbus = MP_ISA_BUS;
++ intsrc.mpc_srcbusirq = bus_irq; /* IRQ */
++ intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; /* APIC ID */
++ intsrc.mpc_dstirq = pin; /* INTIN# */
++
++ MP_intsrc_info(&intsrc);
++}
++
++void __init mp_config_acpi_legacy_irqs(void)
++{
++ struct mpc_config_intsrc intsrc;
++ int i = 0;
++ int ioapic = -1;
++
++#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
++ /*
++ * Fabricate the legacy ISA bus (bus #31).
++ */
++ mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
++#endif
++ set_bit(MP_ISA_BUS, mp_bus_not_pci);
++ Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
++
++ /*
++ * Older generations of ES7000 have no legacy identity mappings
++ */
++ if (es7000_plat == 1)
++ return;
++
++ /*
++ * Locate the IOAPIC that manages the ISA IRQs (0-15).
++ */
++ ioapic = mp_find_ioapic(0);
++ if (ioapic < 0)
++ return;
++
++ intsrc.mpc_type = MP_INTSRC;
++ intsrc.mpc_irqflag = 0; /* Conforming */
++ intsrc.mpc_srcbus = MP_ISA_BUS;
++#ifdef CONFIG_X86_IO_APIC
++ intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid;
++#endif
++ /*
++ * Use the default configuration for the IRQs 0-15. Unless
++ * overridden by (MADT) interrupt source override entries.
++ */
++ for (i = 0; i < 16; i++) {
++ int idx;
++
++ for (idx = 0; idx < mp_irq_entries; idx++) {
++ struct mpc_config_intsrc *irq = mp_irqs + idx;
++
++ /* Do we already have a mapping for this ISA IRQ? */
++ if (irq->mpc_srcbus == MP_ISA_BUS
++ && irq->mpc_srcbusirq == i)
++ break;
++
++ /* Do we already have a mapping for this IOAPIC pin */
++ if ((irq->mpc_dstapic == intsrc.mpc_dstapic) &&
++ (irq->mpc_dstirq == i))
++ break;
++ }
++
++ if (idx != mp_irq_entries) {
++ printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
++ continue; /* IRQ already used */
++ }
++
++ intsrc.mpc_irqtype = mp_INT;
++ intsrc.mpc_srcbusirq = i; /* Identity mapped */
++ intsrc.mpc_dstirq = i;
++
++ MP_intsrc_info(&intsrc);
++ }
++}
++
++int mp_register_gsi(u32 gsi, int triggering, int polarity)
++{
++ int ioapic;
++ int ioapic_pin;
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
++#define MAX_GSI_NUM 4096
++#define IRQ_COMPRESSION_START 64
++
++ static int pci_irq = IRQ_COMPRESSION_START;
++ /*
++ * Mapping between Global System Interrupts, which
++ * represent all possible interrupts, and IRQs
++ * assigned to actual devices.
++ */
++ static int gsi_to_irq[MAX_GSI_NUM];
++#else
++
++ if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
++ return gsi;
++#endif
++
++ /* Don't set up the ACPI SCI because it's already set up */
++ if (acpi_gbl_FADT.sci_interrupt == gsi)
++ return gsi;
++
++ ioapic = mp_find_ioapic(gsi);
++ if (ioapic < 0) {
++ printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
++ return gsi;
++ }
++
++ ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
++
++#ifndef CONFIG_X86_32
++ if (ioapic_renumber_irq)
++ gsi = ioapic_renumber_irq(ioapic, gsi);
++#endif
++
++ /*
++ * Avoid pin reprogramming. PRTs typically include entries
++ * with redundant pin->gsi mappings (but unique PCI devices);
++ * we only program the IOAPIC on the first.
++ */
++ if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
++ printk(KERN_ERR "Invalid reference to IOAPIC pin "
++ "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
++ ioapic_pin);
++ return gsi;
++ }
++ if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
++ Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
++ mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
++ return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
++#else
++ return gsi;
++#endif
++ }
++
++ set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
++ /*
++ * For GSI >= 64, use IRQ compression
++ */
++ if ((gsi >= IRQ_COMPRESSION_START)
++ && (triggering == ACPI_LEVEL_SENSITIVE)) {
++ /*
++ * For PCI devices assign IRQs in order, avoiding gaps
++ * due to unused I/O APIC pins.
++ */
++ int irq = gsi;
++ if (gsi < MAX_GSI_NUM) {
++ /*
++ * Retain the VIA chipset work-around (gsi > 15), but
++ * avoid a problem where the 8254 timer (IRQ0) is setup
++ * via an override (so it's not on pin 0 of the ioapic),
++ * and at the same time, the pin 0 interrupt is a PCI
++ * type. The gsi > 15 test could cause these two pins
++ * to be shared as IRQ0, and they are not shareable.
++ * So test for this condition, and if necessary, avoid
++ * the pin collision.
++ */
++ gsi = pci_irq++;
++ /*
++ * Don't assign IRQ used by ACPI SCI
++ */
++ if (gsi == acpi_gbl_FADT.sci_interrupt)
++ gsi = pci_irq++;
++ gsi_to_irq[irq] = gsi;
++ } else {
++ printk(KERN_ERR "GSI %u is too high\n", gsi);
++ return gsi;
++ }
++ }
++#endif
++ io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
++ triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
++ polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
++ return gsi;
++}
++
++#endif /* CONFIG_X86_IO_APIC */
++#endif /* CONFIG_ACPI */
+--- a/arch/x86/kernel/pci-dma-xen.c
++++ b/arch/x86/kernel/pci-dma-xen.c
+@@ -1,283 +1,251 @@
+-/*
+- * Dynamic DMA mapping support.
+- *
+- * On i386 there is no hardware dynamic DMA address translation,
+- * so consistent alloc/free are merely page allocation/freeing.
+- * The rest of the dynamic DMA mapping interface is implemented
+- * in asm/pci.h.
+- */
+-
+-#include <linux/types.h>
+-#include <linux/mm.h>
+-#include <linux/string.h>
++#include <linux/dma-mapping.h>
++#include <linux/dmar.h>
++#include <linux/bootmem.h>
+ #include <linux/pci.h>
+-#include <linux/module.h>
+-#include <linux/version.h>
+-#include <asm/io.h>
+-#include <xen/balloon.h>
+-#include <xen/gnttab.h>
+-#include <asm/swiotlb.h>
+-#include <asm/tlbflush.h>
+-#include <asm/swiotlb_32.h>
+-#include <asm/gnttab_dma.h>
+-#include <asm/bug.h>
+
+-#ifdef __x86_64__
+-#include <asm/iommu.h>
++#include <asm/proto.h>
++#include <asm/dma.h>
++#include <asm/gart.h>
++#include <asm/calgary.h>
++
++int forbid_dac __read_mostly;
++EXPORT_SYMBOL(forbid_dac);
++
++const struct dma_mapping_ops *dma_ops;
++EXPORT_SYMBOL(dma_ops);
++
++static int iommu_sac_force __read_mostly;
++
++#ifdef CONFIG_IOMMU_DEBUG
++int panic_on_overflow __read_mostly = 1;
++int force_iommu __read_mostly = 1;
++#else
++int panic_on_overflow __read_mostly = 0;
++int force_iommu __read_mostly = 0;
++#endif
+
+ int iommu_merge __read_mostly = 0;
+-EXPORT_SYMBOL(iommu_merge);
+
+-dma_addr_t bad_dma_address __read_mostly;
+-EXPORT_SYMBOL(bad_dma_address);
++int no_iommu __read_mostly;
++/* Set this to 1 if there is a HW IOMMU in the system */
++int iommu_detected __read_mostly = 0;
+
+ /* This tells the BIO block layer to assume merging. Default to off
+ because we cannot guarantee merging later. */
+ int iommu_bio_merge __read_mostly = 0;
+ EXPORT_SYMBOL(iommu_bio_merge);
+
+-int force_iommu __read_mostly= 0;
++dma_addr_t bad_dma_address __read_mostly = 0;
++EXPORT_SYMBOL(bad_dma_address);
+
+-__init int iommu_setup(char *p)
+-{
+- return 1;
+-}
++/* Dummy device used for NULL arguments (normally ISA). Better would
++ be probably a smaller DMA mask, but this is bug-to-bug compatible
++ to older i386. */
++struct device fallback_dev = {
++ .bus_id = "fallback device",
++ .coherent_dma_mask = DMA_32BIT_MASK,
++ .dma_mask = &fallback_dev.coherent_dma_mask,
++};
+
+-void __init pci_iommu_alloc(void)
++int dma_set_mask(struct device *dev, u64 mask)
+ {
+-#ifdef CONFIG_SWIOTLB
+- pci_swiotlb_init();
+-#endif
+-}
++ if (!dev->dma_mask || !dma_supported(dev, mask))
++ return -EIO;
++
++ *dev->dma_mask = mask;
+
+-static int __init pci_iommu_init(void)
+-{
+- no_iommu_init();
+ return 0;
+ }
++EXPORT_SYMBOL(dma_set_mask);
+
+-/* Must execute after PCI subsystem */
+-fs_initcall(pci_iommu_init);
+-#endif
+-
+-struct dma_coherent_mem {
+- void *virt_base;
+- u32 device_base;
+- int size;
+- int flags;
+- unsigned long *bitmap;
+-};
+-
+-#define IOMMU_BUG_ON(test) \
+-do { \
+- if (unlikely(test)) { \
+- printk(KERN_ALERT "Fatal DMA error! " \
+- "Please use 'swiotlb=force'\n"); \
+- BUG(); \
+- } \
+-} while (0)
++#if defined(CONFIG_X86_64) && !defined(CONFIG_XEN)
++static __initdata void *dma32_bootmem_ptr;
++static unsigned long dma32_bootmem_size __initdata = (128ULL<<20);
+
+-static int check_pages_physically_contiguous(unsigned long pfn,
+- unsigned int offset,
+- size_t length)
++static int __init parse_dma32_size_opt(char *p)
+ {
+- unsigned long next_mfn;
+- int i;
+- int nr_pages;
+-
+- next_mfn = pfn_to_mfn(pfn);
+- nr_pages = (offset + length + PAGE_SIZE-1) >> PAGE_SHIFT;
+-
+- for (i = 1; i < nr_pages; i++) {
+- if (pfn_to_mfn(++pfn) != ++next_mfn)
+- return 0;
+- }
+- return 1;
++ if (!p)
++ return -EINVAL;
++ dma32_bootmem_size = memparse(p, &p);
++ return 0;
+ }
++early_param("dma32_size", parse_dma32_size_opt);
+
+-int range_straddles_page_boundary(paddr_t p, size_t size)
++void __init dma32_reserve_bootmem(void)
+ {
+- unsigned long pfn = p >> PAGE_SHIFT;
+- unsigned int offset = p & ~PAGE_MASK;
++ unsigned long size, align;
++ if (end_pfn <= MAX_DMA32_PFN)
++ return;
+
+- return ((offset + size > PAGE_SIZE) &&
+- !check_pages_physically_contiguous(pfn, offset, size));
++ align = 64ULL<<20;
++ size = round_up(dma32_bootmem_size, align);
++ dma32_bootmem_ptr = __alloc_bootmem_nopanic(size, align,
++ __pa(MAX_DMA_ADDRESS));
++ if (dma32_bootmem_ptr)
++ dma32_bootmem_size = size;
++ else
++ dma32_bootmem_size = 0;
+ }
+-
+-int
+-dma_map_sg(struct device *hwdev, struct scatterlist *sgl, int nents,
+- enum dma_data_direction direction)
++static void __init dma32_free_bootmem(void)
+ {
+- int i, rc;
++ int node;
++
++ if (end_pfn <= MAX_DMA32_PFN)
++ return;
+
+- BUG_ON(!valid_dma_direction(direction));
+- WARN_ON(nents == 0 || sgl->length == 0);
++ if (!dma32_bootmem_ptr)
++ return;
+
+- if (swiotlb) {
+- rc = swiotlb_map_sg(hwdev, sgl, nents, direction);
+- } else {
+- struct scatterlist *sg;
+-
+- for_each_sg(sgl, sg, nents, i) {
+- BUG_ON(!sg_page(sg));
+- sg->dma_address =
+- gnttab_dma_map_page(sg_page(sg)) + sg->offset;
+- sg->dma_length = sg->length;
+- IOMMU_BUG_ON(address_needs_mapping(
+- hwdev, sg->dma_address));
+- IOMMU_BUG_ON(range_straddles_page_boundary(
+- page_to_pseudophys(sg_page(sg)) + sg->offset,
+- sg->length));
+- }
+- rc = nents;
+- }
++ for_each_online_node(node)
++ free_bootmem_node(NODE_DATA(node), __pa(dma32_bootmem_ptr),
++ dma32_bootmem_size);
+
+- flush_write_buffers();
+- return rc;
++ dma32_bootmem_ptr = NULL;
++ dma32_bootmem_size = 0;
+ }
+-EXPORT_SYMBOL(dma_map_sg);
++#else
++#define dma32_free_bootmem() ((void)0)
++#endif
+
+-void
+-dma_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nents,
+- enum dma_data_direction direction)
+-{
+- int i;
++static const struct dma_mapping_ops swiotlb_dma_ops = {
++ .mapping_error = swiotlb_dma_mapping_error,
++ .map_single = swiotlb_map_single_phys,
++ .unmap_single = swiotlb_unmap_single,
++ .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
++ .sync_single_for_device = swiotlb_sync_single_for_device,
++ .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
++ .sync_single_range_for_device = swiotlb_sync_single_range_for_device,
++ .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
++ .sync_sg_for_device = swiotlb_sync_sg_for_device,
++ .map_sg = swiotlb_map_sg,
++ .unmap_sg = swiotlb_unmap_sg,
++ .dma_supported = swiotlb_dma_supported
++};
+
+- BUG_ON(!valid_dma_direction(direction));
+- if (swiotlb)
+- swiotlb_unmap_sg(hwdev, sgl, nents, direction);
+- else {
+- struct scatterlist *sg;
++void __init pci_iommu_alloc(void)
++{
++ /* free the range so iommu could get some range less than 4G */
++ dma32_free_bootmem();
++ /*
++ * The order of these functions is important for
++ * fall-back/fail-over reasons
++ */
++#ifdef CONFIG_GART_IOMMU
++ gart_iommu_hole_init();
++#endif
+
+- for_each_sg(sgl, sg, nents, i)
+- gnttab_dma_unmap_page(sg->dma_address);
+- }
+-}
+-EXPORT_SYMBOL(dma_unmap_sg);
++#ifdef CONFIG_CALGARY_IOMMU
++ detect_calgary();
++#endif
+
+-#ifdef CONFIG_HIGHMEM
+-dma_addr_t
+-dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+- size_t size, enum dma_data_direction direction)
+-{
+- dma_addr_t dma_addr;
++ detect_intel_iommu();
+
+- BUG_ON(!valid_dma_direction(direction));
++#ifdef CONFIG_SWIOTLB
++ swiotlb_init();
+ if (swiotlb) {
+- dma_addr = swiotlb_map_page(
+- dev, page, offset, size, direction);
+- } else {
+- dma_addr = gnttab_dma_map_page(page) + offset;
+- IOMMU_BUG_ON(address_needs_mapping(dev, dma_addr));
++ printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
++ dma_ops = &swiotlb_dma_ops;
+ }
+-
+- return dma_addr;
++#endif
+ }
+-EXPORT_SYMBOL(dma_map_page);
+
+-void
+-dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+- enum dma_data_direction direction)
++/*
++ * See <Documentation/x86_64/boot-options.txt> for the iommu kernel parameter
++ * documentation.
++ */
++static __init int iommu_setup(char *p)
+ {
+- BUG_ON(!valid_dma_direction(direction));
+- if (swiotlb)
+- swiotlb_unmap_page(dev, dma_address, size, direction);
+- else
+- gnttab_dma_unmap_page(dma_address);
+-}
+-EXPORT_SYMBOL(dma_unmap_page);
+-#endif /* CONFIG_HIGHMEM */
++ iommu_merge = 1;
+
+-int
+-dma_mapping_error(dma_addr_t dma_addr)
+-{
+- if (swiotlb)
+- return swiotlb_dma_mapping_error(dma_addr);
+- return 0;
+-}
+-EXPORT_SYMBOL(dma_mapping_error);
++ if (!p)
++ return -EINVAL;
+
+-int
+-dma_supported(struct device *dev, u64 mask)
+-{
+- if (swiotlb)
+- return swiotlb_dma_supported(dev, mask);
+- /*
+- * By default we'll BUG when an infeasible DMA is requested, and
+- * request swiotlb=force (see IOMMU_BUG_ON).
+- */
+- return 1;
+-}
+-EXPORT_SYMBOL(dma_supported);
++ while (*p) {
++ if (!strncmp(p, "off", 3))
++ no_iommu = 1;
++ /* gart_parse_options has more force support */
++ if (!strncmp(p, "force", 5))
++ force_iommu = 1;
++ if (!strncmp(p, "noforce", 7)) {
++ iommu_merge = 0;
++ force_iommu = 0;
++ }
+
+-void *dma_alloc_coherent(struct device *dev, size_t size,
+- dma_addr_t *dma_handle, gfp_t gfp)
+-{
+- void *ret;
+- struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
+- unsigned int order = get_order(size);
+- unsigned long vstart;
+- u64 mask;
++ if (!strncmp(p, "biomerge", 8)) {
++ iommu_bio_merge = 4096;
++ iommu_merge = 1;
++ force_iommu = 1;
++ }
++ if (!strncmp(p, "panic", 5))
++ panic_on_overflow = 1;
++ if (!strncmp(p, "nopanic", 7))
++ panic_on_overflow = 0;
++ if (!strncmp(p, "merge", 5)) {
++ iommu_merge = 1;
++ force_iommu = 1;
++ }
++ if (!strncmp(p, "nomerge", 7))
++ iommu_merge = 0;
++ if (!strncmp(p, "forcesac", 8))
++ iommu_sac_force = 1;
++ if (!strncmp(p, "allowdac", 8))
++ forbid_dac = 0;
++ if (!strncmp(p, "nodac", 5))
++ forbid_dac = -1;
++ if (!strncmp(p, "usedac", 6)) {
++ forbid_dac = -1;
++ return 1;
++ }
++#ifdef CONFIG_SWIOTLB
++ if (!strncmp(p, "soft", 4))
++ swiotlb = 1;
++#endif
+
+- /* ignore region specifiers */
+- gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
++#ifdef CONFIG_GART_IOMMU
++ gart_parse_options(p);
++#endif
+
+- if (mem) {
+- int page = bitmap_find_free_region(mem->bitmap, mem->size,
+- order);
+- if (page >= 0) {
+- *dma_handle = mem->device_base + (page << PAGE_SHIFT);
+- ret = mem->virt_base + (page << PAGE_SHIFT);
+- memset(ret, 0, size);
+- return ret;
+- }
+- if (mem->flags & DMA_MEMORY_EXCLUSIVE)
+- return NULL;
++#ifdef CONFIG_CALGARY_IOMMU
++ if (!strncmp(p, "calgary", 7))
++ use_calgary = 1;
++#endif /* CONFIG_CALGARY_IOMMU */
++
++ p += strcspn(p, ",");
++ if (*p == ',')
++ ++p;
+ }
++ return 0;
++}
++early_param("iommu", iommu_setup);
+
+- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+- gfp |= GFP_DMA;
+-
+- vstart = __get_free_pages(gfp, order);
+- ret = (void *)vstart;
++static int check_pages_physically_contiguous(unsigned long pfn,
++ unsigned int offset,
++ size_t length)
++{
++ unsigned long next_mfn;
++ int i;
++ int nr_pages;
+
+- if (dev != NULL && dev->coherent_dma_mask)
+- mask = dev->coherent_dma_mask;
+- else
+- mask = 0xffffffff;
++ next_mfn = pfn_to_mfn(pfn);
++ nr_pages = (offset + length + PAGE_SIZE-1) >> PAGE_SHIFT;
+
+- if (ret != NULL) {
+- if (xen_create_contiguous_region(vstart, order,
+- fls64(mask)) != 0) {
+- free_pages(vstart, order);
+- return NULL;
+- }
+- memset(ret, 0, size);
+- *dma_handle = virt_to_bus(ret);
++ for (i = 1; i < nr_pages; i++) {
++ if (pfn_to_mfn(++pfn) != ++next_mfn)
++ return 0;
+ }
+- return ret;
++ return 1;
+ }
+-EXPORT_SYMBOL(dma_alloc_coherent);
+
+-void dma_free_coherent(struct device *dev, size_t size,
+- void *vaddr, dma_addr_t dma_handle)
++int range_straddles_page_boundary(paddr_t p, size_t size)
+ {
+- struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
+- int order = get_order(size);
+-
+- WARN_ON(irqs_disabled()); /* for portability */
+- if (mem && vaddr >= mem->virt_base && vaddr < (mem->virt_base + (mem->size << PAGE_SHIFT))) {
+- int page = (vaddr - mem->virt_base) >> PAGE_SHIFT;
++ unsigned long pfn = p >> PAGE_SHIFT;
++ unsigned int offset = p & ~PAGE_MASK;
+
+- bitmap_release_region(mem->bitmap, page, order);
+- } else {
+- xen_destroy_contiguous_region((unsigned long)vaddr, order);
+- free_pages((unsigned long)vaddr, order);
+- }
++ return ((offset + size > PAGE_SIZE) &&
++ !check_pages_physically_contiguous(pfn, offset, size));
+ }
+-EXPORT_SYMBOL(dma_free_coherent);
+
+-#ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
++#ifdef CONFIG_X86_32
+ int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+ dma_addr_t device_addr, size_t size, int flags)
+ {
+@@ -327,8 +295,8 @@ EXPORT_SYMBOL(dma_declare_coherent_memor
+ void dma_release_declared_memory(struct device *dev)
+ {
+ struct dma_coherent_mem *mem = dev->dma_mem;
+-
+- if(!mem)
++
++ if (!mem)
+ return;
+ dev->dma_mem = NULL;
+ iounmap(mem->virt_base);
+@@ -341,8 +309,10 @@ void *dma_mark_declared_memory_occupied(
+ dma_addr_t device_addr, size_t size)
+ {
+ struct dma_coherent_mem *mem = dev->dma_mem;
+- int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ int pos, err;
++ int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1);
++
++ pages >>= PAGE_SHIFT;
+
+ if (!mem)
+ return ERR_PTR(-EINVAL);
+@@ -354,103 +324,270 @@ void *dma_mark_declared_memory_occupied(
+ return mem->virt_base + (pos << PAGE_SHIFT);
+ }
+ EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
+-#endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
+-
+-#if defined(CONFIG_PCI) && !defined(CONFIG_XEN)
+-/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
+
+-int forbid_dac;
+-EXPORT_SYMBOL(forbid_dac);
+-
+-static __devinit void via_no_dac(struct pci_dev *dev)
++static int dma_alloc_from_coherent_mem(struct device *dev, ssize_t size,
++ dma_addr_t *dma_handle, void **ret)
+ {
+- if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
+- printk(KERN_INFO "PCI: VIA PCI bridge detected. Disabling DAC.\n");
+- forbid_dac = 1;
++ struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
++ int order = get_order(size);
++
++ if (mem) {
++ int page = bitmap_find_free_region(mem->bitmap, mem->size,
++ order);
++ if (page >= 0) {
++ *dma_handle = mem->device_base + (page << PAGE_SHIFT);
++ *ret = mem->virt_base + (page << PAGE_SHIFT);
++ memset(*ret, 0, size);
++ }
++ if (mem->flags & DMA_MEMORY_EXCLUSIVE)
++ *ret = NULL;
+ }
++ return (mem != NULL);
+ }
+-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
+
+-static int check_iommu(char *s)
++static int dma_release_coherent(struct device *dev, int order, void *vaddr)
+ {
+- if (!strcmp(s, "usedac")) {
+- forbid_dac = -1;
++ struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
++
++ if (mem && vaddr >= mem->virt_base && vaddr <
++ (mem->virt_base + (mem->size << PAGE_SHIFT))) {
++ int page = (vaddr - mem->virt_base) >> PAGE_SHIFT;
++
++ bitmap_release_region(mem->bitmap, page, order);
+ return 1;
+ }
+ return 0;
+ }
+-__setup("iommu=", check_iommu);
++#else
++#define dma_alloc_from_coherent_mem(dev, size, handle, ret) (0)
++#define dma_release_coherent(dev, order, vaddr) (0)
++#endif /* CONFIG_X86_32 */
++
++int dma_supported(struct device *dev, u64 mask)
++{
++#ifdef CONFIG_PCI
++ if (mask > 0xffffffff && forbid_dac > 0) {
++ printk(KERN_INFO "PCI: Disallowing DAC for device %s\n",
++ dev->bus_id);
++ return 0;
++ }
+ #endif
+
+-dma_addr_t
+-dma_map_single(struct device *dev, void *ptr, size_t size,
+- enum dma_data_direction direction)
++ if (dma_ops->dma_supported)
++ return dma_ops->dma_supported(dev, mask);
++
++ /* Copied from i386. Doesn't make much sense, because it will
++ only work for pci_alloc_coherent.
++ The caller just has to use GFP_DMA in this case. */
++ if (mask < DMA_24BIT_MASK)
++ return 0;
++
++ /* Tell the device to use SAC when IOMMU force is on. This
++ allows the driver to use cheaper accesses in some cases.
++
++ Problem with this is that if we overflow the IOMMU area and
++ return DAC as fallback address the device may not handle it
++ correctly.
++
++ As a special case some controllers have a 39bit address
++ mode that is as efficient as 32bit (aic79xx). Don't force
++ SAC for these. Assume all masks <= 40 bits are of this
++ type. Normally this doesn't make any difference, but gives
++ more gentle handling of IOMMU overflow. */
++ if (iommu_sac_force && (mask >= DMA_40BIT_MASK)) {
++ printk(KERN_INFO "%s: Force SAC with mask %Lx\n",
++ dev->bus_id, mask);
++ return 0;
++ }
++
++ return 1;
++}
++EXPORT_SYMBOL(dma_supported);
++
++/* Allocate DMA memory on node near device */
++static struct page *
++dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order)
+ {
+- dma_addr_t dma;
++ int node;
+
+- BUG_ON(!valid_dma_direction(direction));
+- WARN_ON(size == 0);
++ node = dev_to_node(dev);
+
+- if (swiotlb) {
+- dma = swiotlb_map_single(dev, ptr, size, direction);
+- } else {
+- dma = gnttab_dma_map_page(virt_to_page(ptr)) +
+- offset_in_page(ptr);
+- IOMMU_BUG_ON(range_straddles_page_boundary(__pa(ptr), size));
+- IOMMU_BUG_ON(address_needs_mapping(dev, dma));
+- }
+-
+- flush_write_buffers();
+- return dma;
+-}
+-EXPORT_SYMBOL(dma_map_single);
+-
+-void
+-dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- if (swiotlb)
+- swiotlb_unmap_single(dev, dma_addr, size, direction);
+- else
+- gnttab_dma_unmap_page(dma_addr);
++ return alloc_pages_node(node, gfp, order);
++}
++
++/*
++ * Allocate memory for a coherent mapping.
++ */
++void *
++dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
++ gfp_t gfp)
++{
++ void *memory = NULL;
++ struct page *page;
++ unsigned long dma_mask = 0;
++ int noretry = 0;
++ unsigned int order = get_order(size);
++
++ /* ignore region specifiers */
++ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
++
++ if (dma_alloc_from_coherent_mem(dev, size, dma_handle, &memory))
++ return memory;
++
++ if (!dev) {
++ dev = &fallback_dev;
++ gfp |= GFP_DMA;
++ }
++ dma_mask = dev->coherent_dma_mask;
++ if (dma_mask == 0)
++ dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK;
++
++ /* Device not DMA able */
++ if (dev->dma_mask == NULL)
++ return NULL;
++
++ /* Don't invoke OOM killer or retry in lower 16MB DMA zone */
++ if (gfp & __GFP_DMA)
++ noretry = 1;
++
++#ifdef CONFIG_XEN
++ gfp &= ~(__GFP_DMA | __GFP_DMA32);
++#else
++#ifdef CONFIG_X86_64
++ /* Why <=? Even when the mask is smaller than 4GB it is often
++ larger than 16MB and in this case we have a chance of
++ finding fitting memory in the next higher zone first. If
++ not retry with true GFP_DMA. -AK */
++ if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) {
++ gfp |= GFP_DMA32;
++#endif
++
++ again:
++#endif
++ page = dma_alloc_pages(dev,
++ noretry ? gfp | __GFP_NORETRY : gfp, order);
++ if (page == NULL)
++ return NULL;
++
++#ifndef CONFIG_XEN
++ {
++ int high, mmu;
++ dma_addr_t bus = page_to_phys(page);
++ memory = page_address(page);
++ high = (bus + size) >= dma_mask;
++ mmu = high;
++ if (force_iommu && !(gfp & GFP_DMA))
++ mmu = 1;
++ else if (high) {
++ free_pages((unsigned long)memory, order);
++
++ /* Don't use the 16MB ZONE_DMA unless absolutely
++ needed. It's better to use remapping first. */
++ if (dma_mask < DMA_32BIT_MASK && !(gfp & GFP_DMA)) {
++ gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
++ goto again;
++ }
++
++ /* Let low level make its own zone decisions */
++ gfp &= ~(GFP_DMA32|GFP_DMA);
++
++ if (dma_ops->alloc_coherent)
++ return dma_ops->alloc_coherent(dev, size,
++ dma_handle, gfp);
++ return NULL;
++ }
++
++ memset(memory, 0, size);
++ if (!mmu) {
++ *dma_handle = bus;
++ return memory;
++ }
++ }
++
++ if (dma_ops->alloc_coherent) {
++ free_pages((unsigned long)memory, order);
++ gfp &= ~(GFP_DMA|GFP_DMA32);
++ return dma_ops->alloc_coherent(dev, size, dma_handle, gfp);
++ }
++
++ if (dma_ops->map_simple) {
++ *dma_handle = dma_ops->map_simple(dev, virt_to_bus(memory),
++ size,
++ PCI_DMA_BIDIRECTIONAL);
++ if (*dma_handle != bad_dma_address)
++ return memory;
++ }
++#else
++ memory = page_address(page);
++ if (xen_create_contiguous_region((unsigned long)memory, order,
++ fls64(dma_mask)) == 0) {
++ memset(memory, 0, size);
++ *dma_handle = virt_to_bus(memory);
++ return memory;
++ }
++#endif
++
++ if (panic_on_overflow)
++ panic("dma_alloc_coherent: IOMMU overflow by %lu bytes\n",
++ (unsigned long)size);
++ free_pages((unsigned long)memory, order);
++ return NULL;
+ }
+-EXPORT_SYMBOL(dma_unmap_single);
++EXPORT_SYMBOL(dma_alloc_coherent);
+
+-void
+-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+- enum dma_data_direction direction)
++/*
++ * Unmap coherent memory.
++ * The caller must ensure that the device has finished accessing the mapping.
++ */
++void dma_free_coherent(struct device *dev, size_t size,
++ void *vaddr, dma_addr_t bus)
+ {
+- if (swiotlb)
+- swiotlb_sync_single_for_cpu(dev, dma_handle, size, direction);
++ int order = get_order(size);
++ WARN_ON(irqs_disabled()); /* for portability */
++ if (dma_release_coherent(dev, order, vaddr))
++ return;
++#ifndef CONFIG_XEN
++ if (dma_ops->unmap_single)
++ dma_ops->unmap_single(dev, bus, size, 0);
++#endif
++ xen_destroy_contiguous_region((unsigned long)vaddr, order);
++ free_pages((unsigned long)vaddr, order);
+ }
+-EXPORT_SYMBOL(dma_sync_single_for_cpu);
++EXPORT_SYMBOL(dma_free_coherent);
+
+-void
+-dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
+- enum dma_data_direction direction)
++static int __init pci_iommu_init(void)
+ {
+- if (swiotlb)
+- swiotlb_sync_single_for_device(dev, dma_handle, size, direction);
++#ifdef CONFIG_CALGARY_IOMMU
++ calgary_iommu_init();
++#endif
++
++ intel_iommu_init();
++
++#ifdef CONFIG_GART_IOMMU
++ gart_iommu_init();
++#endif
++
++ no_iommu_init();
++ return 0;
+ }
+-EXPORT_SYMBOL(dma_sync_single_for_device);
+
+-void
+-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
++void pci_iommu_shutdown(void)
+ {
+- if (swiotlb)
+- swiotlb_sync_sg_for_cpu(dev,sg,nelems,direction);
+- flush_write_buffers();
++ gart_iommu_shutdown();
+ }
+-EXPORT_SYMBOL(dma_sync_sg_for_cpu);
++/* Must execute after PCI subsystem */
++fs_initcall(pci_iommu_init);
++
++#ifdef CONFIG_PCI
++/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
+
+-void
+-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
++static __devinit void via_no_dac(struct pci_dev *dev)
+ {
+- if (swiotlb)
+- swiotlb_sync_sg_for_device(dev,sg,nelems,direction);
+- flush_write_buffers();
++ if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
++ printk(KERN_INFO "PCI: VIA PCI bridge detected."
++ "Disabling DAC.\n");
++ forbid_dac = 1;
++ }
+ }
+-EXPORT_SYMBOL(dma_sync_sg_for_device);
++DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
++#endif
+--- /dev/null
++++ b/arch/x86/kernel/pci-nommu-xen.c
+@@ -0,0 +1,103 @@
++#include <linux/dma-mapping.h>
++#include <linux/dmar.h>
++#include <linux/bootmem.h>
++#include <linux/pci.h>
++
++#include <xen/gnttab.h>
++
++#include <asm/proto.h>
++#include <asm/dma.h>
++#include <asm/swiotlb.h>
++#include <asm/tlbflush.h>
++#include <asm/gnttab_dma.h>
++#include <asm/bug.h>
++
++#define IOMMU_BUG_ON(test) \
++do { \
++ if (unlikely(test)) { \
++ printk(KERN_ALERT "Fatal DMA error! " \
++ "Please use 'swiotlb=force'\n"); \
++ BUG(); \
++ } \
++} while (0)
++
++static int
++gnttab_map_sg(struct device *hwdev, struct scatterlist *sgl, int nents,
++ int direction)
++{
++ unsigned int i;
++ struct scatterlist *sg;
++
++ WARN_ON(nents == 0 || sgl->length == 0);
++
++ for_each_sg(sgl, sg, nents, i) {
++ BUG_ON(!sg_page(sg));
++ sg->dma_address =
++ gnttab_dma_map_page(sg_page(sg)) + sg->offset;
++ sg->dma_length = sg->length;
++ IOMMU_BUG_ON(address_needs_mapping(
++ hwdev, sg->dma_address));
++ IOMMU_BUG_ON(range_straddles_page_boundary(
++ page_to_pseudophys(sg_page(sg)) + sg->offset,
++ sg->length));
++ }
++
++ return nents;
++}
++
++static void
++gnttab_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nents,
++ int direction)
++{
++ unsigned int i;
++ struct scatterlist *sg;
++
++ for_each_sg(sgl, sg, nents, i)
++ gnttab_dma_unmap_page(sg->dma_address);
++}
++
++static dma_addr_t
++gnttab_map_single(struct device *dev, phys_addr_t paddr, size_t size,
++ int direction)
++{
++ dma_addr_t dma;
++
++ WARN_ON(size == 0);
++
++ dma = gnttab_dma_map_page(pfn_to_page(paddr >> PAGE_SHIFT)) +
++ offset_in_page(paddr);
++ IOMMU_BUG_ON(range_straddles_page_boundary(paddr, size));
++ IOMMU_BUG_ON(address_needs_mapping(dev, dma));
++
++ return dma;
++}
++
++static void
++gnttab_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
++ int direction)
++{
++ gnttab_dma_unmap_page(dma_addr);
++}
++
++static int nommu_mapping_error(dma_addr_t dma_addr)
++{
++ return (dma_addr == bad_dma_address);
++}
++
++static const struct dma_mapping_ops nommu_dma_ops = {
++ .map_single = gnttab_map_single,
++ .unmap_single = gnttab_unmap_single,
++ .map_sg = gnttab_map_sg,
++ .unmap_sg = gnttab_unmap_sg,
++ .dma_supported = swiotlb_dma_supported,
++ .mapping_error = nommu_mapping_error
++};
++
++void __init no_iommu_init(void)
++{
++ if (dma_ops)
++ return;
++
++ force_iommu = 0; /* no HW IOMMU */
++ dma_ops = &nommu_dma_ops;
++}
+--- a/arch/x86/kernel/process_32-xen.c
++++ b/arch/x86/kernel/process_32-xen.c
+@@ -36,6 +36,7 @@
+ #include <linux/personality.h>
+ #include <linux/tick.h>
+ #include <linux/percpu.h>
++#include <linux/prctl.h>
+
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -45,7 +46,6 @@
+ #include <asm/processor.h>
+ #include <asm/i387.h>
+ #include <asm/desc.h>
+-#include <asm/vm86.h>
+ #ifdef CONFIG_MATH_EMULATION
+ #include <asm/math_emu.h>
+ #endif
+@@ -102,16 +102,6 @@ void enable_hlt(void)
+
+ EXPORT_SYMBOL(enable_hlt);
+
+-/*
+- * On SMP it's slightly faster (but much more power-consuming!)
+- * to poll the ->work.need_resched flag instead of waiting for the
+- * cross-CPU IPI to arrive. Use this option with caution.
+- */
+-static void poll_idle(void)
+-{
+- cpu_relax();
+-}
+-
+ static void xen_idle(void)
+ {
+ current_thread_info()->status &= ~TS_POLLING;
+@@ -121,20 +111,10 @@ static void xen_idle(void)
+ */
+ smp_mb();
+
+- local_irq_disable();
+- if (!need_resched()) {
+- ktime_t t0, t1;
+- u64 t0n, t1n;
+-
+- t0 = ktime_get();
+- t0n = ktime_to_ns(t0);
++ if (!need_resched())
+ safe_halt(); /* enables interrupts racelessly */
+- local_irq_disable();
+- t1 = ktime_get();
+- t1n = ktime_to_ns(t1);
+- sched_clock_idle_wakeup_event(t1n - t0n);
+- }
+- local_irq_enable();
++ else
++ local_irq_enable();
+ current_thread_info()->status |= TS_POLLING;
+ }
+ #ifdef CONFIG_APM_MODULE
+@@ -142,7 +122,6 @@ EXPORT_SYMBOL(default_idle);
+ #endif
+
+ #ifdef CONFIG_HOTPLUG_CPU
+-extern cpumask_t cpu_initialized;
+ static inline void play_dead(void)
+ {
+ idle_task_exit();
+@@ -187,6 +166,7 @@ void cpu_idle(void)
+ if (cpu_is_offline(cpu))
+ play_dead();
+
++ local_irq_disable();
+ __get_cpu_var(irq_stat).idle_timestamp = jiffies;
+ idle();
+ }
+@@ -197,44 +177,6 @@ void cpu_idle(void)
+ }
+ }
+
+-static void do_nothing(void *unused)
+-{
+-}
+-
+-/*
+- * cpu_idle_wait - Used to ensure that all the CPUs discard old value of
+- * pm_idle and update to new pm_idle value. Required while changing pm_idle
+- * handler on SMP systems.
+- *
+- * Caller must have changed pm_idle to the new value before the call. Old
+- * pm_idle value will not be used by any CPU after the return of this function.
+- */
+-void cpu_idle_wait(void)
+-{
+- smp_mb();
+- /* kick all the CPUs so that they exit out of pm_idle */
+- smp_call_function(do_nothing, NULL, 0, 1);
+-}
+-EXPORT_SYMBOL_GPL(cpu_idle_wait);
+-
+-void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
+-{
+-}
+-
+-static int __init idle_setup(char *str)
+-{
+- if (!strcmp(str, "poll")) {
+- printk("using polling idle threads.\n");
+- pm_idle = poll_idle;
+- }
+- else
+- return -1;
+-
+- boot_option_idle_override = 1;
+- return 0;
+-}
+-early_param("idle", idle_setup);
+-
+ void __show_registers(struct pt_regs *regs, int all)
+ {
+ unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
+@@ -260,7 +202,7 @@ void __show_registers(struct pt_regs *re
+ init_utsname()->version);
+
+ printk("EIP: %04x:[<%08lx>] EFLAGS: %08lx CPU: %d\n",
+- 0xffff & regs->cs, regs->ip, regs->flags,
++ (u16)regs->cs, regs->ip, regs->flags,
+ smp_processor_id());
+ print_symbol("EIP is at %s\n", regs->ip);
+
+@@ -269,8 +211,7 @@ void __show_registers(struct pt_regs *re
+ printk("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n",
+ regs->si, regs->di, regs->bp, sp);
+ printk(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n",
+- regs->ds & 0xffff, regs->es & 0xffff,
+- regs->fs & 0xffff, gs, ss);
++ (u16)regs->ds, (u16)regs->es, (u16)regs->fs, gs, ss);
+
+ if (!all)
+ return;
+@@ -367,6 +308,7 @@ void flush_thread(void)
+ /*
+ * Forget coprocessor state..
+ */
++ tsk->fpu_counter = 0;
+ clear_fpu(tsk);
+ clear_used_math();
+ }
+@@ -437,11 +379,30 @@ int copy_thread(int nr, unsigned long cl
+ return err;
+ }
+
+-#ifdef CONFIG_SECCOMP
++void
++start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
++{
++ __asm__("movl %0, %%gs" :: "r"(0));
++ regs->fs = 0;
++ set_fs(USER_DS);
++ regs->ds = __USER_DS;
++ regs->es = __USER_DS;
++ regs->ss = __USER_DS;
++ regs->cs = __USER_CS;
++ regs->ip = new_ip;
++ regs->sp = new_sp;
++ /*
++ * Free the old FP and other extended state
++ */
++ free_thread_xstate(current);
++}
++EXPORT_SYMBOL_GPL(start_thread);
++
+ static void hard_disable_TSC(void)
+ {
+ write_cr4(read_cr4() | X86_CR4_TSD);
+ }
++
+ void disable_TSC(void)
+ {
+ preempt_disable();
+@@ -453,11 +414,47 @@ void disable_TSC(void)
+ hard_disable_TSC();
+ preempt_enable();
+ }
++
+ static void hard_enable_TSC(void)
+ {
+ write_cr4(read_cr4() & ~X86_CR4_TSD);
+ }
+-#endif /* CONFIG_SECCOMP */
++
++static void enable_TSC(void)
++{
++ preempt_disable();
++ if (test_and_clear_thread_flag(TIF_NOTSC))
++ /*
++ * Must flip the CPU state synchronously with
++ * TIF_NOTSC in the current running context.
++ */
++ hard_enable_TSC();
++ preempt_enable();
++}
++
++int get_tsc_mode(unsigned long adr)
++{
++ unsigned int val;
++
++ if (test_thread_flag(TIF_NOTSC))
++ val = PR_TSC_SIGSEGV;
++ else
++ val = PR_TSC_ENABLE;
++
++ return put_user(val, (unsigned int __user *)adr);
++}
++
++int set_tsc_mode(unsigned int val)
++{
++ if (val == PR_TSC_SIGSEGV)
++ disable_TSC();
++ else if (val == PR_TSC_ENABLE)
++ enable_TSC();
++ else
++ return -EINVAL;
++
++ return 0;
++}
+
+ static noinline void
+ __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p)
+@@ -473,12 +470,12 @@ __switch_to_xtra(struct task_struct *pre
+ /* we clear debugctl to make sure DS
+ * is not in use when we change it */
+ debugctl = 0;
+- wrmsrl(MSR_IA32_DEBUGCTLMSR, 0);
++ update_debugctlmsr(0);
+ wrmsr(MSR_IA32_DS_AREA, next->ds_area_msr, 0);
+ }
+
+ if (next->debugctlmsr != debugctl)
+- wrmsr(MSR_IA32_DEBUGCTLMSR, next->debugctlmsr, 0);
++ update_debugctlmsr(next->debugctlmsr);
+
+ if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
+ set_debugreg(next->debugreg0, 0);
+@@ -490,7 +487,6 @@ __switch_to_xtra(struct task_struct *pre
+ set_debugreg(next->debugreg7, 7);
+ }
+
+-#ifdef CONFIG_SECCOMP
+ if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
+ test_tsk_thread_flag(next_p, TIF_NOTSC)) {
+ /* prev and next are different */
+@@ -499,7 +495,6 @@ __switch_to_xtra(struct task_struct *pre
+ else
+ hard_enable_TSC();
+ }
+-#endif
+
+ #ifdef X86_BTS
+ if (test_tsk_thread_flag(prev_p, TIF_BTS_TRACE_TS))
+@@ -637,7 +632,7 @@ struct task_struct * __switch_to(struct
+
+ /* we're going to use this soon, after a few expensive things */
+ if (next_p->fpu_counter > 5)
+- prefetch(&next->i387.fxsave);
++ prefetch(next->xstate);
+
+ /*
+ * Now maybe handle debug registers
+@@ -658,8 +653,11 @@ struct task_struct * __switch_to(struct
+ /* If the task has used fpu the last 5 timeslices, just do a full
+ * restore of the math state immediately to avoid the trap; the
+ * chances of needing FPU soon are obviously high now
++ *
++ * tsk_used_math() checks prevent calling math_state_restore(),
++ * which can sleep in the case of !tsk_used_math()
+ */
+- if (next_p->fpu_counter > 5)
++ if (tsk_used_math(next_p) && next_p->fpu_counter > 5)
+ math_state_restore();
+
+ /*
+--- a/arch/x86/kernel/process_64-xen.c
++++ b/arch/x86/kernel/process_64-xen.c
+@@ -39,6 +39,7 @@
+ #include <linux/kprobes.h>
+ #include <linux/kdebug.h>
+ #include <linux/tick.h>
++#include <linux/prctl.h>
+
+ #include <asm/uaccess.h>
+ #include <asm/pgtable.h>
+@@ -102,17 +103,6 @@ void exit_idle(void)
+ __exit_idle();
+ }
+
+-/*
+- * On SMP it's slightly faster (but much more power-consuming!)
+- * to poll the ->need_resched flag instead of waiting for the
+- * cross-CPU IPI to arrive. Use this option with caution.
+- */
+-static void poll_idle(void)
+-{
+- local_irq_enable();
+- cpu_relax();
+-}
+-
+ static void xen_idle(void)
+ {
+ current_thread_info()->status &= ~TS_POLLING;
+@@ -121,20 +111,10 @@ static void xen_idle(void)
+ * test NEED_RESCHED:
+ */
+ smp_mb();
+- local_irq_disable();
+- if (!need_resched()) {
+- ktime_t t0, t1;
+- u64 t0n, t1n;
+-
+- t0 = ktime_get();
+- t0n = ktime_to_ns(t0);
++ if (!need_resched())
+ safe_halt(); /* enables interrupts racelessly */
+- local_irq_disable();
+- t1 = ktime_get();
+- t1n = ktime_to_ns(t1);
+- sched_clock_idle_wakeup_event(t1n - t0n);
+- }
+- local_irq_enable();
++ else
++ local_irq_enable();
+ current_thread_info()->status |= TS_POLLING;
+ }
+
+@@ -195,45 +175,6 @@ void cpu_idle(void)
+ }
+ }
+
+-static void do_nothing(void *unused)
+-{
+-}
+-
+-/*
+- * cpu_idle_wait - Used to ensure that all the CPUs discard old value of
+- * pm_idle and update to new pm_idle value. Required while changing pm_idle
+- * handler on SMP systems.
+- *
+- * Caller must have changed pm_idle to the new value before the call. Old
+- * pm_idle value will not be used by any CPU after the return of this function.
+- */
+-void cpu_idle_wait(void)
+-{
+- smp_mb();
+- /* kick all the CPUs so that they exit out of pm_idle */
+- smp_call_function(do_nothing, NULL, 0, 1);
+-}
+-EXPORT_SYMBOL_GPL(cpu_idle_wait);
+-
+-void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
+-{
+-}
+-
+-static int __init idle_setup(char *str)
+-{
+- if (!strcmp(str, "poll")) {
+- printk("using polling idle threads.\n");
+- pm_idle = poll_idle;
+- } else if (!strcmp(str, "mwait"))
+- force_mwait = 1;
+- else
+- return -1;
+-
+- boot_option_idle_override = 1;
+- return 0;
+-}
+-early_param("idle", idle_setup);
+-
+ /* Prints also some state that isn't saved in the pt_regs */
+ void __show_regs(struct pt_regs * regs)
+ {
+@@ -360,6 +301,7 @@ void flush_thread(void)
+ /*
+ * Forget coprocessor state..
+ */
++ tsk->fpu_counter = 0;
+ clear_fpu(tsk);
+ clear_used_math();
+ }
+@@ -472,6 +414,83 @@ out:
+ return err;
+ }
+
++void
++start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
++{
++ asm volatile("movl %0, %%fs; movl %0, %%es; movl %0, %%ds" :: "r"(0));
++ load_gs_index(0);
++ regs->ip = new_ip;
++ regs->sp = new_sp;
++ write_pda(oldrsp, new_sp);
++ regs->cs = __USER_CS;
++ regs->ss = __USER_DS;
++ regs->flags = 0x200;
++ set_fs(USER_DS);
++ /*
++ * Free the old FP and other extended state
++ */
++ free_thread_xstate(current);
++}
++EXPORT_SYMBOL_GPL(start_thread);
++
++static void hard_disable_TSC(void)
++{
++ write_cr4(read_cr4() | X86_CR4_TSD);
++}
++
++void disable_TSC(void)
++{
++ preempt_disable();
++ if (!test_and_set_thread_flag(TIF_NOTSC))
++ /*
++ * Must flip the CPU state synchronously with
++ * TIF_NOTSC in the current running context.
++ */
++ hard_disable_TSC();
++ preempt_enable();
++}
++
++static void hard_enable_TSC(void)
++{
++ write_cr4(read_cr4() & ~X86_CR4_TSD);
++}
++
++static void enable_TSC(void)
++{
++ preempt_disable();
++ if (test_and_clear_thread_flag(TIF_NOTSC))
++ /*
++ * Must flip the CPU state synchronously with
++ * TIF_NOTSC in the current running context.
++ */
++ hard_enable_TSC();
++ preempt_enable();
++}
++
++int get_tsc_mode(unsigned long adr)
++{
++ unsigned int val;
++
++ if (test_thread_flag(TIF_NOTSC))
++ val = PR_TSC_SIGSEGV;
++ else
++ val = PR_TSC_ENABLE;
++
++ return put_user(val, (unsigned int __user *)adr);
++}
++
++int set_tsc_mode(unsigned int val)
++{
++ if (val == PR_TSC_SIGSEGV)
++ disable_TSC();
++ else if (val == PR_TSC_ENABLE)
++ enable_TSC();
++ else
++ return -EINVAL;
++
++ return 0;
++}
++
+ /*
+ * This special macro can be used to load a debugging register
+ */
+@@ -491,12 +510,12 @@ static inline void __switch_to_xtra(stru
+ /* we clear debugctl to make sure DS
+ * is not in use when we change it */
+ debugctl = 0;
+- wrmsrl(MSR_IA32_DEBUGCTLMSR, 0);
++ update_debugctlmsr(0);
+ wrmsrl(MSR_IA32_DS_AREA, next->ds_area_msr);
+ }
+
+ if (next->debugctlmsr != debugctl)
+- wrmsrl(MSR_IA32_DEBUGCTLMSR, next->debugctlmsr);
++ update_debugctlmsr(next->debugctlmsr);
+
+ if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
+ loaddebug(next, 0);
+@@ -508,6 +527,15 @@ static inline void __switch_to_xtra(stru
+ loaddebug(next, 7);
+ }
+
++ if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
++ test_tsk_thread_flag(next_p, TIF_NOTSC)) {
++ /* prev and next are different */
++ if (test_tsk_thread_flag(next_p, TIF_NOTSC))
++ hard_disable_TSC();
++ else
++ hard_enable_TSC();
++ }
++
+ #ifdef X86_BTS
+ if (test_tsk_thread_flag(prev_p, TIF_BTS_TRACE_TS))
+ ptrace_bts_take_timestamp(prev_p, BTS_TASK_DEPARTS);
+@@ -547,7 +575,7 @@ __switch_to(struct task_struct *prev_p,
+
+ /* we're going to use this soon, after a few expensive things */
+ if (next_p->fpu_counter>5)
+- prefetch(&next->i387.fxsave);
++ prefetch(next->xstate);
+
+ /*
+ * This is basically '__unlazy_fpu', except that we queue a
+@@ -680,8 +708,11 @@ __switch_to(struct task_struct *prev_p,
+ /* If the task has used fpu the last 5 timeslices, just do a full
+ * restore of the math state immediately to avoid the trap; the
+ * chances of needing FPU soon are obviously high now
++ *
++ * tsk_used_math() checks prevent calling math_state_restore(),
++ * which can sleep in the case of !tsk_used_math()
+ */
+- if (next_p->fpu_counter>5)
++ if (tsk_used_math(next_p) && next_p->fpu_counter > 5)
+ math_state_restore();
+ return prev_p;
+ }
+--- /dev/null
++++ b/arch/x86/kernel/process-xen.c
+@@ -0,0 +1,188 @@
++#include <linux/errno.h>
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <linux/smp.h>
++#include <linux/slab.h>
++#include <linux/sched.h>
++#include <linux/module.h>
++#include <linux/pm.h>
++
++struct kmem_cache *task_xstate_cachep;
++
++int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
++{
++ *dst = *src;
++ if (src->thread.xstate) {
++ dst->thread.xstate = kmem_cache_alloc(task_xstate_cachep,
++ GFP_KERNEL);
++ if (!dst->thread.xstate)
++ return -ENOMEM;
++ WARN_ON((unsigned long)dst->thread.xstate & 15);
++ memcpy(dst->thread.xstate, src->thread.xstate, xstate_size);
++ }
++ return 0;
++}
++
++void free_thread_xstate(struct task_struct *tsk)
++{
++ if (tsk->thread.xstate) {
++ kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
++ tsk->thread.xstate = NULL;
++ }
++}
++
++void free_thread_info(struct thread_info *ti)
++{
++ free_thread_xstate(ti->task);
++ free_pages((unsigned long)ti, get_order(THREAD_SIZE));
++}
++
++void arch_task_cache_init(void)
++{
++ task_xstate_cachep =
++ kmem_cache_create("task_xstate", xstate_size,
++ __alignof__(union thread_xstate),
++ SLAB_PANIC, NULL);
++}
++
++static void do_nothing(void *unused)
++{
++}
++
++/*
++ * cpu_idle_wait - Used to ensure that all the CPUs discard old value of
++ * pm_idle and update to new pm_idle value. Required while changing pm_idle
++ * handler on SMP systems.
++ *
++ * Caller must have changed pm_idle to the new value before the call. Old
++ * pm_idle value will not be used by any CPU after the return of this function.
++ */
++void cpu_idle_wait(void)
++{
++ smp_mb();
++ /* kick all the CPUs so that they exit out of pm_idle */
++ smp_call_function(do_nothing, NULL, 0, 1);
++}
++EXPORT_SYMBOL_GPL(cpu_idle_wait);
++
++#ifndef CONFIG_XEN
++/*
++ * This uses new MONITOR/MWAIT instructions on P4 processors with PNI,
++ * which can obviate IPI to trigger checking of need_resched.
++ * We execute MONITOR against need_resched and enter optimized wait state
++ * through MWAIT. Whenever someone changes need_resched, we would be woken
++ * up from MWAIT (without an IPI).
++ *
++ * New with Core Duo processors, MWAIT can take some hints based on CPU
++ * capability.
++ */
++void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
++{
++ if (!need_resched()) {
++ __monitor((void *)¤t_thread_info()->flags, 0, 0);
++ smp_mb();
++ if (!need_resched())
++ __mwait(ax, cx);
++ }
++}
++
++/* Default MONITOR/MWAIT with no hints, used for default C1 state */
++static void mwait_idle(void)
++{
++ if (!need_resched()) {
++ __monitor((void *)¤t_thread_info()->flags, 0, 0);
++ smp_mb();
++ if (!need_resched())
++ __sti_mwait(0, 0);
++ else
++ local_irq_enable();
++ } else
++ local_irq_enable();
++}
++#endif
++
++/*
++ * On SMP it's slightly faster (but much more power-consuming!)
++ * to poll the ->work.need_resched flag instead of waiting for the
++ * cross-CPU IPI to arrive. Use this option with caution.
++ */
++static void poll_idle(void)
++{
++ local_irq_enable();
++ cpu_relax();
++}
++
++#ifndef CONFIG_XEN
++/*
++ * mwait selection logic:
++ *
++ * It depends on the CPU. For AMD CPUs that support MWAIT this is
++ * wrong. Family 0x10 and 0x11 CPUs will enter C1 on HLT. Powersavings
++ * then depend on a clock divisor and current Pstate of the core. If
++ * all cores of a processor are in halt state (C1) the processor can
++ * enter the C1E (C1 enhanced) state. If mwait is used this will never
++ * happen.
++ *
++ * idle=mwait overrides this decision and forces the usage of mwait.
++ */
++static int __cpuinit mwait_usable(const struct cpuinfo_x86 *c)
++{
++ if (force_mwait)
++ return 1;
++
++ if (c->x86_vendor == X86_VENDOR_AMD) {
++ switch(c->x86) {
++ case 0x10:
++ case 0x11:
++ return 0;
++ }
++ }
++ return 1;
++}
++#endif
++
++void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
++{
++#ifndef CONFIG_XEN
++ static int selected;
++
++ if (selected)
++ return;
++#ifdef CONFIG_X86_SMP
++ if (pm_idle == poll_idle && smp_num_siblings > 1) {
++ printk(KERN_WARNING "WARNING: polling idle and HT enabled,"
++ " performance may degrade.\n");
++ }
++#endif
++ if (cpu_has(c, X86_FEATURE_MWAIT) && mwait_usable(c)) {
++ /*
++ * Skip, if setup has overridden idle.
++ * One CPU supports mwait => All CPUs supports mwait
++ */
++ if (!pm_idle) {
++ printk(KERN_INFO "using mwait in idle threads.\n");
++ pm_idle = mwait_idle;
++ }
++ }
++ selected = 1;
++#endif
++}
++
++static int __init idle_setup(char *str)
++{
++ if (!strcmp(str, "poll")) {
++ printk("using polling idle threads.\n");
++ pm_idle = poll_idle;
++ }
++#ifndef CONFIG_XEN
++ else if (!strcmp(str, "mwait"))
++ force_mwait = 1;
++#endif
++ else
++ return -1;
++
++ boot_option_idle_override = 1;
++ return 0;
++}
++early_param("idle", idle_setup);
++
+--- a/arch/x86/kernel/setup_32-xen.c
++++ b/arch/x86/kernel/setup_32-xen.c
+@@ -39,6 +39,7 @@
+ #include <linux/efi.h>
+ #include <linux/init.h>
+ #include <linux/edd.h>
++#include <linux/iscsi_ibft.h>
+ #include <linux/nodemask.h>
+ #include <linux/kernel.h>
+ #include <linux/percpu.h>
+@@ -49,6 +50,7 @@
+ #include <linux/pfn.h>
+ #include <linux/pci.h>
+ #include <linux/init_ohci1394_dma.h>
++#include <linux/kvm_para.h>
+
+ #include <video/edid.h>
+
+@@ -70,8 +72,9 @@
+ #include <xen/firmware.h>
+ #include <xen/xencons.h>
+ #include <setup_arch.h>
+-#include <bios_ebda.h>
++#include <asm/bios_ebda.h>
+ #include <asm/cacheflush.h>
++#include <asm/processor.h>
+
+ #ifdef CONFIG_XEN
+ #include <xen/interface/kexec.h>
+@@ -136,7 +139,12 @@ static struct resource standard_io_resou
+ }, {
+ .name = "keyboard",
+ .start = 0x0060,
+- .end = 0x006f,
++ .end = 0x0060,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO
++}, {
++ .name = "keyboard",
++ .start = 0x0064,
++ .end = 0x0064,
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO
+ }, {
+ .name = "dma page reg",
+@@ -166,6 +174,8 @@ struct cpuinfo_x86 new_cpu_data __cpuini
+ struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
+ EXPORT_SYMBOL(boot_cpu_data);
+
++unsigned int def_to_bigsmp;
++
+ #ifndef CONFIG_X86_PAE
+ unsigned long mmu_cr4_features;
+ #else
+@@ -204,7 +214,7 @@ EXPORT_SYMBOL(ist_info);
+ extern void early_cpu_init(void);
+ extern int root_mountflags;
+
+-unsigned long saved_videomode;
++unsigned long saved_video_mode;
+
+ #define RAMDISK_IMAGE_START_MASK 0x07FF
+ #define RAMDISK_PROMPT_FLAG 0x8000
+@@ -259,7 +269,7 @@ static inline void copy_edd(void)
+ }
+ #endif
+
+-int __initdata user_defined_memmap = 0;
++int __initdata user_defined_memmap;
+
+ /*
+ * "mem=nopentium" disables the 4MB page tables.
+@@ -420,20 +430,59 @@ unsigned long __init find_max_low_pfn(vo
+ }
+
+ #ifndef CONFIG_XEN
++#define BIOS_LOWMEM_KILOBYTES 0x413
++
+ /*
+- * workaround for Dell systems that neglect to reserve EBDA
++ * The BIOS places the EBDA/XBDA at the top of conventional
++ * memory, and usually decreases the reported amount of
++ * conventional memory (int 0x12) too. This also contains a
++ * workaround for Dell systems that neglect to reserve EBDA.
++ * The same workaround also avoids a problem with the AMD768MPX
++ * chipset: reserve a page before VGA to prevent PCI prefetch
++ * into it (errata #56). Usually the page is reserved anyways,
++ * unless you have no PS/2 mouse plugged in.
+ */
+ static void __init reserve_ebda_region(void)
+ {
+- unsigned int addr;
+- addr = get_bios_ebda();
+- if (addr)
+- reserve_bootmem(addr, PAGE_SIZE, BOOTMEM_DEFAULT);
++ unsigned int lowmem, ebda_addr;
++
++ /* To determine the position of the EBDA and the */
++ /* end of conventional memory, we need to look at */
++ /* the BIOS data area. In a paravirtual environment */
++ /* that area is absent. We'll just have to assume */
++ /* that the paravirt case can handle memory setup */
++ /* correctly, without our help. */
++ if (paravirt_enabled())
++ return;
++
++ /* end of low (conventional) memory */
++ lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES);
++ lowmem <<= 10;
++
++ /* start of EBDA area */
++ ebda_addr = get_bios_ebda();
++
++ /* Fixup: bios puts an EBDA in the top 64K segment */
++ /* of conventional memory, but does not adjust lowmem. */
++ if ((lowmem - ebda_addr) <= 0x10000)
++ lowmem = ebda_addr;
++
++ /* Fixup: bios does not report an EBDA at all. */
++ /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */
++ if ((ebda_addr == 0) && (lowmem >= 0x9f000))
++ lowmem = 0x9f000;
++
++ /* Paranoia: should never happen, but... */
++ if ((lowmem == 0) || (lowmem >= 0x100000))
++ lowmem = 0x9f000;
++
++ /* reserve all memory between lowmem and the 1MB mark */
++ reserve_bootmem(lowmem, 0x100000 - lowmem, BOOTMEM_DEFAULT);
+ }
+ #endif
+
+ #ifndef CONFIG_NEED_MULTIPLE_NODES
+-void __init setup_bootmem_allocator(void);
++static void __init setup_bootmem_allocator(void);
+ static unsigned long __init setup_memory(void)
+ {
+ /*
+@@ -469,7 +518,7 @@ static unsigned long __init setup_memory
+ return max_low_pfn;
+ }
+
+-void __init zone_sizes_init(void)
++static void __init zone_sizes_init(void)
+ {
+ unsigned long max_zone_pfns[MAX_NR_ZONES];
+ memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+@@ -521,10 +570,16 @@ static void __init reserve_crashkernel(v
+ (unsigned long)(crash_size >> 20),
+ (unsigned long)(crash_base >> 20),
+ (unsigned long)(total_mem >> 20));
++
++ if (reserve_bootmem(crash_base, crash_size,
++ BOOTMEM_EXCLUSIVE) < 0) {
++ printk(KERN_INFO "crashkernel reservation "
++ "failed - memory is in use\n");
++ return;
++ }
++
+ crashk_res.start = crash_base;
+ crashk_res.end = crash_base + crash_size - 1;
+- reserve_bootmem(crash_base, crash_size,
+- BOOTMEM_DEFAULT);
+ } else
+ printk(KERN_INFO "crashkernel reservation failed - "
+ "you have to specify a base address\n");
+@@ -658,16 +713,9 @@ void __init setup_bootmem_allocator(void
+ */
+ reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT);
+
+- /* reserve EBDA region, it's a 4K region */
++ /* reserve EBDA region */
+ reserve_ebda_region();
+
+- /* could be an AMD 768MPX chipset. Reserve a page before VGA to prevent
+- PCI prefetch into it (errata #56). Usually the page is reserved anyways,
+- unless you have no PS/2 mouse plugged in. */
+- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
+- boot_cpu_data.x86 == 6)
+- reserve_bootmem(0xa0000 - 4096, 4096, BOOTMEM_DEFAULT);
+-
+ #ifdef CONFIG_SMP
+ /*
+ * But first pinch a few for the stack/trampoline stuff
+@@ -689,6 +737,8 @@ void __init setup_bootmem_allocator(void
+ #endif
+ numa_kva_reserve();
+ reserve_crashkernel();
++
++ reserve_ibft_region();
+ }
+
+ /*
+@@ -724,6 +774,18 @@ char * __init __attribute__((weak)) memo
+ return machine_specific_memory_setup();
+ }
+
++#ifdef CONFIG_NUMA
++/*
++ * In the golden day, when everything among i386 and x86_64 will be
++ * integrated, this will not live here
++ */
++void *x86_cpu_to_node_map_early_ptr;
++int x86_cpu_to_node_map_init[NR_CPUS] = {
++ [0 ... NR_CPUS-1] = NUMA_NO_NODE
++};
++DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE;
++#endif
++
+ /*
+ * Determine if we were loaded by an EFI loader. If so, then we have also been
+ * passed the efi memmap, systab, etc., so we should use these data structures
+@@ -773,7 +835,7 @@ void __init setup_arch(char **cmdline_p)
+ copy_edid();
+ apm_info.bios = boot_params.apm_bios_info;
+ ist_info = boot_params.ist_info;
+- saved_videomode = boot_params.hdr.vid_mode;
++ saved_video_mode = boot_params.hdr.vid_mode;
+ if( boot_params.sys_desc_table.length != 0 ) {
+ set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
+ machine_id = boot_params.sys_desc_table.table[0];
+@@ -840,15 +902,19 @@ void __init setup_arch(char **cmdline_p)
+ efi_init();
+
+ /* update e820 for memory not covered by WB MTRRs */
+- find_max_pfn();
++ propagate_e820_map();
+ mtrr_bp_init();
+ #ifndef CONFIG_XEN
+ if (mtrr_trim_uncached_memory(max_pfn))
+- find_max_pfn();
++ propagate_e820_map();
+ #endif
+
+ max_low_pfn = setup_memory();
+
++#ifdef CONFIG_KVM_CLOCK
++ kvmclock_init();
++#endif
++
+ #ifdef CONFIG_VMI
+ /*
+ * Must be after max_low_pfn is determined, and before kernel
+@@ -856,6 +922,7 @@ void __init setup_arch(char **cmdline_p)
+ */
+ vmi_init();
+ #endif
++ kvm_guest_init();
+
+ /*
+ * NOTE: before this point _nobody_ is allowed to allocate
+@@ -977,6 +1044,18 @@ void __init setup_arch(char **cmdline_p)
+
+ io_delay_init();
+
++#if defined(CONFIG_X86_SMP) && !defined(CONFIG_XEN)
++ /*
++ * setup to use the early static init tables during kernel startup
++ * X86_SMP will exclude sub-arches that don't deal well with it.
++ */
++ x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
++ x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init;
++#ifdef CONFIG_NUMA
++ x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init;
++#endif
++#endif
++
+ #ifdef CONFIG_X86_GENERICARCH
+ generic_apic_probe();
+ #endif
+--- a/arch/x86/kernel/setup_64-xen.c
++++ b/arch/x86/kernel/setup_64-xen.c
+@@ -29,18 +29,22 @@
+ #include <linux/crash_dump.h>
+ #include <linux/root_dev.h>
+ #include <linux/pci.h>
++#include <asm/pci-direct.h>
+ #include <linux/efi.h>
+ #include <linux/acpi.h>
+ #include <linux/kallsyms.h>
+ #include <linux/edd.h>
++#include <linux/iscsi_ibft.h>
+ #include <linux/mmzone.h>
+ #include <linux/kexec.h>
+ #include <linux/cpufreq.h>
+ #include <linux/dmi.h>
+ #include <linux/dma-mapping.h>
+ #include <linux/ctype.h>
++#include <linux/sort.h>
+ #include <linux/uaccess.h>
+ #include <linux/init_ohci1394_dma.h>
++#include <linux/kvm_para.h>
+
+ #include <asm/mtrr.h>
+ #include <asm/uaccess.h>
+@@ -58,7 +62,6 @@
+ #include <asm/mmu_context.h>
+ #include <asm/proto.h>
+ #include <asm/setup.h>
+-#include <asm/mach_apic.h>
+ #include <asm/numa.h>
+ #include <asm/sections.h>
+ #include <asm/dmi.h>
+@@ -66,6 +69,9 @@
+ #include <asm/mce.h>
+ #include <asm/ds.h>
+ #include <asm/topology.h>
++#include <asm/pat.h>
++
++#include <mach_apic.h>
+ #ifdef CONFIG_XEN
+ #include <linux/percpu.h>
+ #include <xen/interface/physdev.h>
+@@ -149,7 +155,7 @@ extern int root_mountflags;
+
+ char __initdata command_line[COMMAND_LINE_SIZE];
+
+-struct resource standard_io_resources[] = {
++static struct resource standard_io_resources[] = {
+ { .name = "dma1", .start = 0x00, .end = 0x1f,
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+ { .name = "pic1", .start = 0x20, .end = 0x21,
+@@ -158,7 +164,9 @@ struct resource standard_io_resources[]
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+ { .name = "timer1", .start = 0x50, .end = 0x53,
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "keyboard", .start = 0x60, .end = 0x6f,
++ { .name = "keyboard", .start = 0x60, .end = 0x60,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "keyboard", .start = 0x64, .end = 0x64,
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+ { .name = "dma page reg", .start = 0x80, .end = 0x8f,
+ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+@@ -224,8 +232,10 @@ contig_initmem_init(unsigned long start_
+ e820_register_active_regions(0, start_pfn, end_pfn);
+ #ifdef CONFIG_XEN
+ free_bootmem_with_active_regions(0, xen_start_info->nr_pages);
++ early_res_to_bootmem(0, xen_start_info->nr_pages<<PAGE_SHIFT);
+ #else
+ free_bootmem_with_active_regions(0, end_pfn);
++ early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
+ #endif
+ reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
+ }
+@@ -290,6 +300,7 @@ static void __init reserve_crashkernel(v
+ (unsigned long)(total_mem >> 20));
+ crashk_res.start = crash_base;
+ crashk_res.end = crash_base + crash_size - 1;
++ insert_resource(&iomem_resource, &crashk_res);
+ }
+ }
+ #else
+@@ -306,6 +317,40 @@ void __attribute__((weak)) __init memory
+ machine_specific_memory_setup();
+ }
+
++static void __init parse_setup_data(void)
++{
++ struct setup_data *data;
++ unsigned long pa_data;
++
++ if (boot_params.hdr.version < 0x0209)
++ return;
++ pa_data = boot_params.hdr.setup_data;
++ while (pa_data) {
++ data = early_ioremap(pa_data, PAGE_SIZE);
++ switch (data->type) {
++ default:
++ break;
++ }
++#ifndef CONFIG_DEBUG_BOOT_PARAMS
++ free_early(pa_data, pa_data+sizeof(*data)+data->len);
++#endif
++ pa_data = data->next;
++ early_iounmap(data, PAGE_SIZE);
++ }
++}
++
++#ifdef CONFIG_PCI_MMCONFIG
++extern void __cpuinit fam10h_check_enable_mmcfg(void);
++extern void __init check_enable_amd_mmconf_dmi(void);
++#else
++void __cpuinit fam10h_check_enable_mmcfg(void)
++{
++}
++void __init check_enable_amd_mmconf_dmi(void)
++{
++}
++#endif
++
+ /*
+ * setup_arch - architecture-specific boot-time initializations
+ *
+@@ -389,6 +434,8 @@ void __init setup_arch(char **cmdline_p)
+ strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+ *cmdline_p = command_line;
+
++ parse_setup_data();
++
+ parse_early_param();
+
+ #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
+@@ -398,6 +445,13 @@ void __init setup_arch(char **cmdline_p)
+
+ finish_e820_parsing();
+
++#ifndef CONFIG_XEN
++ /* after parse_early_param, so could debug it */
++ insert_resource(&iomem_resource, &code_resource);
++ insert_resource(&iomem_resource, &data_resource);
++ insert_resource(&iomem_resource, &bss_resource);
++#endif
++
+ early_gart_iommu_check();
+
+ e820_register_active_regions(0, 0, -1UL);
+@@ -420,15 +474,23 @@ void __init setup_arch(char **cmdline_p)
+
+ check_efer();
+
+- init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
++ max_pfn_mapped = init_memory_mapping(0, (max_pfn_mapped << PAGE_SHIFT));
+ if (efi_enabled)
+ efi_init();
+
++#ifndef CONFIG_XEN
++ vsmp_init();
++#endif
++
+ if (is_initial_xendomain())
+ dmi_scan_machine();
+
+ io_delay_init();
+
++#ifdef CONFIG_KVM_CLOCK
++ kvmclock_init();
++#endif
++
+ #if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
+ /* setup to use the early static init tables during kernel startup */
+ x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
+@@ -459,9 +521,9 @@ void __init setup_arch(char **cmdline_p)
+ contig_initmem_init(0, end_pfn);
+ #endif
+
+- early_res_to_bootmem();
+-
+ #ifndef CONFIG_XEN
++ dma32_reserve_bootmem();
++
+ #ifdef CONFIG_ACPI_SLEEP
+ /*
+ * Reserve low memory region for sleep support.
+@@ -487,16 +549,17 @@ void __init setup_arch(char **cmdline_p)
+ unsigned long end_of_mem = end_pfn << PAGE_SHIFT;
+
+ if (ramdisk_end <= end_of_mem) {
+-#ifndef CONFIG_XEN
+- reserve_bootmem_generic(ramdisk_image, ramdisk_size);
+-#endif
++ /*
++ * don't need to reserve again, already reserved early
++ * in x86_64_start_kernel, and early_res_to_bootmem
++ * convert that to reserved in bootmem
++ */
+ initrd_start = ramdisk_image + PAGE_OFFSET;
+ initrd_end = initrd_start+ramdisk_size;
+ #ifdef CONFIG_XEN
+ initrd_below_start_ok = 1;
+ #endif
+ } else {
+- /* Assumes everything on node 0 */
+ free_bootmem(ramdisk_image, ramdisk_size);
+ printk(KERN_ERR "initrd extends beyond end of memory "
+ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+@@ -506,6 +569,9 @@ void __init setup_arch(char **cmdline_p)
+ }
+ #endif
+ reserve_crashkernel();
++
++ reserve_ibft_region();
++
+ paging_init();
+ map_vsyscall();
+ #ifdef CONFIG_X86_LOCAL_APIC
+@@ -633,16 +699,16 @@ void __init setup_arch(char **cmdline_p)
+ prefill_possible_map();
+ #endif
+
++ kvm_guest_init();
++
+ /*
+ * We trust e820 completely. No explicit ROM probing in memory.
+ */
+ #ifdef CONFIG_XEN
+ if (is_initial_xendomain())
+- e820_reserve_resources(machine_e820.map, machine_e820.nr_map,
+- &code_resource, &data_resource, &bss_resource);
++ e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
+ #else
+- e820_reserve_resources(e820.map, e820.nr_map,
+- &code_resource, &data_resource, &bss_resource);
++ e820_reserve_resources(e820.map, e820.nr_map);
+ e820_mark_nosave_regions();
+ #endif
+
+@@ -690,6 +756,9 @@ void __init setup_arch(char **cmdline_p)
+ #endif
+
+ #endif /* !CONFIG_XEN */
++
++ /* do this before identify_cpu for boot cpu */
++ check_enable_amd_mmconf_dmi();
+ }
+
+ #ifdef CONFIG_XEN
+@@ -786,9 +855,9 @@ static void __cpuinit amd_detect_cmp(str
+ bits = c->x86_coreid_bits;
+
+ /* Low order bits define the core id (index of core in socket) */
+- c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
+- /* Convert the APIC ID into the socket ID */
+- c->phys_proc_id = phys_pkg_id(bits);
++ c->cpu_core_id = c->initial_apicid & ((1 << bits)-1);
++ /* Convert the initial APIC ID into the socket ID */
++ c->phys_proc_id = c->initial_apicid >> bits;
+
+ #ifdef CONFIG_NUMA
+ node = c->phys_proc_id;
+@@ -805,7 +874,7 @@ static void __cpuinit amd_detect_cmp(str
+ If that doesn't result in a usable node fall back to the
+ path for the previous case. */
+
+- int ht_nodeid = apicid - (cpu_data(0).phys_proc_id << bits);
++ int ht_nodeid = c->initial_apicid;
+
+ if (ht_nodeid >= 0 &&
+ apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
+@@ -913,7 +982,7 @@ static void __cpuinit init_amd(struct cp
+
+ /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
+ 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
+- clear_bit(0*32+31, (unsigned long *)&c->x86_capability);
++ clear_cpu_cap(c, 0*32+31);
+
+ /* On C+ stepping K8 rep microcode works well for copy/memset */
+ level = cpuid_eax(1);
+@@ -955,9 +1024,25 @@ static void __cpuinit init_amd(struct cp
+ /* MFENCE stops RDTSC speculation */
+ set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC);
+
++ if (c->x86 == 0x10)
++ fam10h_check_enable_mmcfg();
++
+ #ifndef CONFIG_XEN
+ if (amd_apic_timer_broken())
+ disable_apic_timer = 1;
++
++ if (c == &boot_cpu_data && c->x86 >= 0xf && c->x86 <= 0x11) {
++ unsigned long long tseg;
++
++ /*
++ * Split up direct mapping around the TSEG SMM area.
++ * Don't do it for gbpages because there seems very little
++ * benefit in doing so.
++ */
++ if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg) &&
++ (tseg >> PMD_SHIFT) < (max_pfn_mapped >> (PMD_SHIFT-PAGE_SHIFT)))
++ set_memory_4k((unsigned long)__va(tseg), 1);
++ }
+ #endif
+ }
+
+@@ -1051,7 +1136,7 @@ static void __cpuinit early_init_intel(s
+ {
+ if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
+ (c->x86 == 0x6 && c->x86_model >= 0x0e))
+- set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
++ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ }
+
+ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
+@@ -1094,9 +1179,6 @@ static void __cpuinit init_intel(struct
+
+ if (c->x86 == 15)
+ c->x86_cache_alignment = c->x86_clflush_size * 2;
+- if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
+- (c->x86 == 0x6 && c->x86_model >= 0x0e))
+- set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ if (c->x86 == 6)
+ set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+ set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
+@@ -1105,6 +1187,32 @@ static void __cpuinit init_intel(struct
+ srat_detect_node();
+ }
+
++static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
++{
++ if (c->x86 == 0x6 && c->x86_model >= 0xf)
++ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
++}
++
++static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
++{
++ /* Cache sizes */
++ unsigned n;
++
++ n = c->extended_cpuid_level;
++ if (n >= 0x80000008) {
++ unsigned eax = cpuid_eax(0x80000008);
++ c->x86_virt_bits = (eax >> 8) & 0xff;
++ c->x86_phys_bits = eax & 0xff;
++ }
++
++ if (c->x86 == 0x6 && c->x86_model >= 0xf) {
++ c->x86_cache_alignment = c->x86_clflush_size * 2;
++ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
++ set_cpu_cap(c, X86_FEATURE_REP_GOOD);
++ }
++ set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
++}
++
+ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
+ {
+ char *v = c->x86_vendor_id;
+@@ -1113,6 +1221,8 @@ static void __cpuinit get_cpu_vendor(str
+ c->x86_vendor = X86_VENDOR_AMD;
+ else if (!strcmp(v, "GenuineIntel"))
+ c->x86_vendor = X86_VENDOR_INTEL;
++ else if (!strcmp(v, "CentaurHauls"))
++ c->x86_vendor = X86_VENDOR_CENTAUR;
+ else
+ c->x86_vendor = X86_VENDOR_UNKNOWN;
+ }
+@@ -1160,15 +1270,16 @@ static void __cpuinit early_identify_cpu
+ c->x86 += (tfms >> 20) & 0xff;
+ if (c->x86 >= 0x6)
+ c->x86_model += ((tfms >> 16) & 0xF) << 4;
+- if (c->x86_capability[0] & (1<<19))
++ if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
+ c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
+ } else {
+ /* Have CPUID level 0 only - unheard of */
+ c->x86 = 4;
+ }
+
++ c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;
+ #ifdef CONFIG_SMP
+- c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
++ c->phys_proc_id = c->initial_apicid;
+ #endif
+ /* AMD-defined flags: level 0x80000001 */
+ xlvl = cpuid_eax(0x80000000);
+@@ -1201,8 +1312,12 @@ static void __cpuinit early_identify_cpu
+ case X86_VENDOR_INTEL:
+ early_init_intel(c);
+ break;
++ case X86_VENDOR_CENTAUR:
++ early_init_centaur(c);
++ break;
+ }
+
++ validate_pat_support(c);
+ }
+
+ /*
+@@ -1237,6 +1352,10 @@ void __cpuinit identify_cpu(struct cpuin
+ init_intel(c);
+ break;
+
++ case X86_VENDOR_CENTAUR:
++ init_centaur(c);
++ break;
++
+ case X86_VENDOR_UNKNOWN:
+ default:
+ display_cacheinfo(c);
+@@ -1266,14 +1385,24 @@ void __cpuinit identify_cpu(struct cpuin
+ #endif
+ select_idle_routine(c);
+
+- if (c != &boot_cpu_data)
+- mtrr_ap_init();
+ #ifdef CONFIG_NUMA
+ numa_add_cpu(smp_processor_id());
+ #endif
+
+ }
+
++void __cpuinit identify_boot_cpu(void)
++{
++ identify_cpu(&boot_cpu_data);
++}
++
++void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
++{
++ BUG_ON(c == &boot_cpu_data);
++ identify_cpu(c);
++ mtrr_ap_init();
++}
++
+ static __init int setup_noclflush(char *arg)
+ {
+ setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
+@@ -1302,123 +1431,3 @@ static __init int setup_disablecpuid(cha
+ return 1;
+ }
+ __setup("clearcpuid=", setup_disablecpuid);
+-
+-/*
+- * Get CPU information for use by the procfs.
+- */
+-
+-static int show_cpuinfo(struct seq_file *m, void *v)
+-{
+- struct cpuinfo_x86 *c = v;
+- int cpu = 0, i;
+-
+-#ifdef CONFIG_SMP
+- cpu = c->cpu_index;
+-#endif
+-
+- seq_printf(m, "processor\t: %u\n"
+- "vendor_id\t: %s\n"
+- "cpu family\t: %d\n"
+- "model\t\t: %d\n"
+- "model name\t: %s\n",
+- (unsigned)cpu,
+- c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
+- c->x86,
+- (int)c->x86_model,
+- c->x86_model_id[0] ? c->x86_model_id : "unknown");
+-
+- if (c->x86_mask || c->cpuid_level >= 0)
+- seq_printf(m, "stepping\t: %d\n", c->x86_mask);
+- else
+- seq_printf(m, "stepping\t: unknown\n");
+-
+- if (cpu_has(c, X86_FEATURE_TSC)) {
+- unsigned int freq = cpufreq_quick_get((unsigned)cpu);
+-
+- if (!freq)
+- freq = cpu_khz;
+- seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
+- freq / 1000, (freq % 1000));
+- }
+-
+- /* Cache size */
+- if (c->x86_cache_size >= 0)
+- seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
+-
+-#ifdef CONFIG_SMP
+- if (smp_num_siblings * c->x86_max_cores > 1) {
+- seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
+- seq_printf(m, "siblings\t: %d\n",
+- cpus_weight(per_cpu(cpu_core_map, cpu)));
+- seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
+- seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
+- }
+-#endif
+-
+- seq_printf(m,
+- "fpu\t\t: yes\n"
+- "fpu_exception\t: yes\n"
+- "cpuid level\t: %d\n"
+- "wp\t\t: yes\n"
+- "flags\t\t:",
+- c->cpuid_level);
+-
+- for (i = 0; i < 32*NCAPINTS; i++)
+- if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
+- seq_printf(m, " %s", x86_cap_flags[i]);
+-
+- seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
+- c->loops_per_jiffy/(500000/HZ),
+- (c->loops_per_jiffy/(5000/HZ)) % 100);
+-
+- if (c->x86_tlbsize > 0)
+- seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
+- seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
+- seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
+-
+- seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
+- c->x86_phys_bits, c->x86_virt_bits);
+-
+- seq_printf(m, "power management:");
+- for (i = 0; i < 32; i++) {
+- if (c->x86_power & (1 << i)) {
+- if (i < ARRAY_SIZE(x86_power_flags) &&
+- x86_power_flags[i])
+- seq_printf(m, "%s%s",
+- x86_power_flags[i][0]?" ":"",
+- x86_power_flags[i]);
+- else
+- seq_printf(m, " [%d]", i);
+- }
+- }
+-
+- seq_printf(m, "\n\n");
+-
+- return 0;
+-}
+-
+-static void *c_start(struct seq_file *m, loff_t *pos)
+-{
+- if (*pos == 0) /* just in case, cpu 0 is not the first */
+- *pos = first_cpu(cpu_online_map);
+- if ((*pos) < NR_CPUS && cpu_online(*pos))
+- return &cpu_data(*pos);
+- return NULL;
+-}
+-
+-static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+-{
+- *pos = next_cpu(*pos, cpu_online_map);
+- return c_start(m, pos);
+-}
+-
+-static void c_stop(struct seq_file *m, void *v)
+-{
+-}
+-
+-const struct seq_operations cpuinfo_op = {
+- .start = c_start,
+- .next = c_next,
+- .stop = c_stop,
+- .show = show_cpuinfo,
+-};
+--- a/arch/x86/kernel/setup64-xen.c
++++ b/arch/x86/kernel/setup64-xen.c
+@@ -15,6 +15,7 @@
+ #include <linux/bootmem.h>
+ #include <linux/bitops.h>
+ #include <linux/module.h>
++#include <linux/kgdb.h>
+ #include <asm/pda.h>
+ #include <asm/pgtable.h>
+ #include <asm/processor.h>
+@@ -27,6 +28,7 @@
+ #include <asm/proto.h>
+ #include <asm/sections.h>
+ #include <asm/setup.h>
++#include <asm/genapic.h>
+ #ifdef CONFIG_XEN
+ #include <asm/hypervisor.h>
+ #endif
+@@ -81,8 +83,8 @@ int force_personality32 = 0;
+ Control non executable heap for 32bit processes.
+ To control the stack too use noexec=off
+
+-on PROT_READ does not imply PROT_EXEC for 32bit processes
+-off PROT_READ implies PROT_EXEC (default)
++on PROT_READ does not imply PROT_EXEC for 32bit processes (default)
++off PROT_READ implies PROT_EXEC
+ */
+ static int __init nonx32_setup(char *str)
+ {
+@@ -94,85 +96,6 @@ static int __init nonx32_setup(char *str
+ }
+ __setup("noexec32=", nonx32_setup);
+
+-/*
+- * Copy data used in early init routines from the initial arrays to the
+- * per cpu data areas. These arrays then become expendable and the
+- * *_early_ptr's are zeroed indicating that the static arrays are gone.
+- */
+-static void __init setup_per_cpu_maps(void)
+-{
+-#ifndef CONFIG_XEN
+- int cpu;
+-
+- for_each_possible_cpu(cpu) {
+-#ifdef CONFIG_SMP
+- if (per_cpu_offset(cpu)) {
+-#endif
+- per_cpu(x86_cpu_to_apicid, cpu) =
+- x86_cpu_to_apicid_init[cpu];
+- per_cpu(x86_bios_cpu_apicid, cpu) =
+- x86_bios_cpu_apicid_init[cpu];
+-#ifdef CONFIG_NUMA
+- per_cpu(x86_cpu_to_node_map, cpu) =
+- x86_cpu_to_node_map_init[cpu];
+-#endif
+-#ifdef CONFIG_SMP
+- }
+- else
+- printk(KERN_NOTICE "per_cpu_offset zero for cpu %d\n",
+- cpu);
+-#endif
+- }
+-
+- /* indicate the early static arrays will soon be gone */
+- x86_cpu_to_apicid_early_ptr = NULL;
+- x86_bios_cpu_apicid_early_ptr = NULL;
+-#ifdef CONFIG_NUMA
+- x86_cpu_to_node_map_early_ptr = NULL;
+-#endif
+-#endif
+-}
+-
+-/*
+- * Great future plan:
+- * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
+- * Always point %gs to its beginning
+- */
+-void __init setup_per_cpu_areas(void)
+-{
+- int i;
+- unsigned long size;
+-
+-#ifdef CONFIG_HOTPLUG_CPU
+- prefill_possible_map();
+-#endif
+-
+- /* Copy section for each CPU (we discard the original) */
+- size = PERCPU_ENOUGH_ROOM;
+-
+- printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n", size);
+- for_each_cpu_mask (i, cpu_possible_map) {
+- char *ptr;
+-#ifndef CONFIG_NEED_MULTIPLE_NODES
+- ptr = alloc_bootmem_pages(size);
+-#else
+- int node = early_cpu_to_node(i);
+-
+- if (!node_online(node) || !NODE_DATA(node))
+- ptr = alloc_bootmem_pages(size);
+- else
+- ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
+-#endif
+- if (!ptr)
+- panic("Cannot allocate cpu data for CPU %d\n", i);
+- cpu_pda(i)->data_offset = ptr - __per_cpu_start;
+- memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+- }
+-
+- /* setup percpu data maps early */
+- setup_per_cpu_maps();
+-}
+-
+ #ifdef CONFIG_XEN
+ static void __init_refok switch_pt(int cpu)
+ {
+@@ -410,6 +333,17 @@ void __cpuinit cpu_init (void)
+ #endif
+ load_LDT(&init_mm.context);
+
++#ifdef CONFIG_KGDB
++ /*
++ * If the kgdb is connected no debug regs should be altered. This
++ * is only applicable when KGDB and a KGDB I/O module are built
++ * into the kernel and you are using early debugging with
++ * kgdbwait. KGDB will control the kernel HW breakpoint registers.
++ */
++ if (kgdb_connected && arch_kgdb_ops.correct_hw_break)
++ arch_kgdb_ops.correct_hw_break();
++ else {
++#endif
+ /*
+ * Clear all 6 debug registers:
+ */
+@@ -420,10 +354,17 @@ void __cpuinit cpu_init (void)
+ set_debugreg(0UL, 3);
+ set_debugreg(0UL, 6);
+ set_debugreg(0UL, 7);
++#ifdef CONFIG_KGDB
++ /* If the kgdb is connected no debug regs should be altered. */
++ }
++#endif
+
+ fpu_init();
+
+ asm ("pushfq; popq %0" : "=rm" (kernel_eflags));
+ if (raw_irqs_disabled())
+ kernel_eflags &= ~X86_EFLAGS_IF;
++
++ if (is_uv_system())
++ uv_cpu_init();
+ }
+--- /dev/null
++++ b/arch/x86/kernel/setup-xen.c
+@@ -0,0 +1,141 @@
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/bootmem.h>
++#include <linux/percpu.h>
++#include <asm/smp.h>
++#include <asm/percpu.h>
++#include <asm/sections.h>
++#include <asm/processor.h>
++#include <asm/setup.h>
++#include <asm/topology.h>
++#include <asm/mpspec.h>
++#include <asm/apicdef.h>
++
++#ifdef CONFIG_X86_LOCAL_APIC
++unsigned int num_processors;
++unsigned disabled_cpus __cpuinitdata;
++/* Processor that is doing the boot up */
++unsigned int boot_cpu_physical_apicid = -1U;
++EXPORT_SYMBOL(boot_cpu_physical_apicid);
++
++DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID;
++EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
++
++/* Bitmask of physically existing CPUs */
++physid_mask_t phys_cpu_present_map;
++#endif
++
++#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_X86_SMP)
++/*
++ * Copy data used in early init routines from the initial arrays to the
++ * per cpu data areas. These arrays then become expendable and the
++ * *_early_ptr's are zeroed indicating that the static arrays are gone.
++ */
++static void __init setup_per_cpu_maps(void)
++{
++#ifndef CONFIG_XEN
++ int cpu;
++
++ for_each_possible_cpu(cpu) {
++ per_cpu(x86_cpu_to_apicid, cpu) = x86_cpu_to_apicid_init[cpu];
++ per_cpu(x86_bios_cpu_apicid, cpu) =
++ x86_bios_cpu_apicid_init[cpu];
++#ifdef CONFIG_NUMA
++ per_cpu(x86_cpu_to_node_map, cpu) =
++ x86_cpu_to_node_map_init[cpu];
++#endif
++ }
++
++ /* indicate the early static arrays will soon be gone */
++ x86_cpu_to_apicid_early_ptr = NULL;
++ x86_bios_cpu_apicid_early_ptr = NULL;
++#ifdef CONFIG_NUMA
++ x86_cpu_to_node_map_early_ptr = NULL;
++#endif
++#endif
++}
++
++#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP
++cpumask_t *cpumask_of_cpu_map __read_mostly;
++EXPORT_SYMBOL(cpumask_of_cpu_map);
++
++/* requires nr_cpu_ids to be initialized */
++static void __init setup_cpumask_of_cpu(void)
++{
++ int i;
++
++ /* alloc_bootmem zeroes memory */
++ cpumask_of_cpu_map = alloc_bootmem_low(sizeof(cpumask_t) * nr_cpu_ids);
++ for (i = 0; i < nr_cpu_ids; i++)
++ cpu_set(i, cpumask_of_cpu_map[i]);
++}
++#else
++static inline void setup_cpumask_of_cpu(void) { }
++#endif
++
++#ifdef CONFIG_X86_32
++/*
++ * Great future not-so-futuristic plan: make i386 and x86_64 do it
++ * the same way
++ */
++unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
++EXPORT_SYMBOL(__per_cpu_offset);
++#endif
++
++/*
++ * Great future plan:
++ * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
++ * Always point %gs to its beginning
++ */
++void __init setup_per_cpu_areas(void)
++{
++ int i, highest_cpu = 0;
++ unsigned long size;
++
++#ifdef CONFIG_HOTPLUG_CPU
++ prefill_possible_map();
++#endif
++
++ /* Copy section for each CPU (we discard the original) */
++ size = PERCPU_ENOUGH_ROOM;
++ printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n",
++ size);
++
++ for_each_possible_cpu(i) {
++ char *ptr;
++#ifndef CONFIG_NEED_MULTIPLE_NODES
++ ptr = alloc_bootmem_pages(size);
++#else
++ int node = early_cpu_to_node(i);
++ if (!node_online(node) || !NODE_DATA(node)) {
++ ptr = alloc_bootmem_pages(size);
++ printk(KERN_INFO
++ "cpu %d has no node or node-local memory\n", i);
++ }
++ else
++ ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
++#endif
++ if (!ptr)
++ panic("Cannot allocate cpu data for CPU %d\n", i);
++#ifdef CONFIG_X86_64
++ cpu_pda(i)->data_offset = ptr - __per_cpu_start;
++#else
++ __per_cpu_offset[i] = ptr - __per_cpu_start;
++#endif
++ memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
++
++ highest_cpu = i;
++ }
++
++ nr_cpu_ids = highest_cpu + 1;
++ printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d\n", NR_CPUS, nr_cpu_ids);
++
++ /* Setup percpu data maps */
++ setup_per_cpu_maps();
++
++ /* Setup cpumask_of_cpu map */
++ setup_cpumask_of_cpu();
++}
++
++#endif
+--- a/arch/x86/kernel/smp_32-xen.c
++++ /dev/null
+@@ -1,647 +0,0 @@
+-/*
+- * Intel SMP support routines.
+- *
+- * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
+- * (c) 1998-99, 2000 Ingo Molnar <mingo@redhat.com>
+- *
+- * This code is released under the GNU General Public License version 2 or
+- * later.
+- */
+-
+-#include <linux/init.h>
+-
+-#include <linux/mm.h>
+-#include <linux/delay.h>
+-#include <linux/spinlock.h>
+-#include <linux/kernel_stat.h>
+-#include <linux/mc146818rtc.h>
+-#include <linux/cache.h>
+-#include <linux/interrupt.h>
+-#include <linux/cpu.h>
+-#include <linux/module.h>
+-
+-#include <asm/mtrr.h>
+-#include <asm/tlbflush.h>
+-#include <asm/mmu_context.h>
+-#if 0
+-#include <mach_apic.h>
+-#endif
+-#include <xen/evtchn.h>
+-
+-/*
+- * Some notes on x86 processor bugs affecting SMP operation:
+- *
+- * Pentium, Pentium Pro, II, III (and all CPUs) have bugs.
+- * The Linux implications for SMP are handled as follows:
+- *
+- * Pentium III / [Xeon]
+- * None of the E1AP-E3AP errata are visible to the user.
+- *
+- * E1AP. see PII A1AP
+- * E2AP. see PII A2AP
+- * E3AP. see PII A3AP
+- *
+- * Pentium II / [Xeon]
+- * None of the A1AP-A3AP errata are visible to the user.
+- *
+- * A1AP. see PPro 1AP
+- * A2AP. see PPro 2AP
+- * A3AP. see PPro 7AP
+- *
+- * Pentium Pro
+- * None of 1AP-9AP errata are visible to the normal user,
+- * except occasional delivery of 'spurious interrupt' as trap #15.
+- * This is very rare and a non-problem.
+- *
+- * 1AP. Linux maps APIC as non-cacheable
+- * 2AP. worked around in hardware
+- * 3AP. fixed in C0 and above steppings microcode update.
+- * Linux does not use excessive STARTUP_IPIs.
+- * 4AP. worked around in hardware
+- * 5AP. symmetric IO mode (normal Linux operation) not affected.
+- * 'noapic' mode has vector 0xf filled out properly.
+- * 6AP. 'noapic' mode might be affected - fixed in later steppings
+- * 7AP. We do not assume writes to the LVT deassering IRQs
+- * 8AP. We do not enable low power mode (deep sleep) during MP bootup
+- * 9AP. We do not use mixed mode
+- *
+- * Pentium
+- * There is a marginal case where REP MOVS on 100MHz SMP
+- * machines with B stepping processors can fail. XXX should provide
+- * an L1cache=Writethrough or L1cache=off option.
+- *
+- * B stepping CPUs may hang. There are hardware work arounds
+- * for this. We warn about it in case your board doesn't have the work
+- * arounds. Basically that's so I can tell anyone with a B stepping
+- * CPU and SMP problems "tough".
+- *
+- * Specific items [From Pentium Processor Specification Update]
+- *
+- * 1AP. Linux doesn't use remote read
+- * 2AP. Linux doesn't trust APIC errors
+- * 3AP. We work around this
+- * 4AP. Linux never generated 3 interrupts of the same priority
+- * to cause a lost local interrupt.
+- * 5AP. Remote read is never used
+- * 6AP. not affected - worked around in hardware
+- * 7AP. not affected - worked around in hardware
+- * 8AP. worked around in hardware - we get explicit CS errors if not
+- * 9AP. only 'noapic' mode affected. Might generate spurious
+- * interrupts, we log only the first one and count the
+- * rest silently.
+- * 10AP. not affected - worked around in hardware
+- * 11AP. Linux reads the APIC between writes to avoid this, as per
+- * the documentation. Make sure you preserve this as it affects
+- * the C stepping chips too.
+- * 12AP. not affected - worked around in hardware
+- * 13AP. not affected - worked around in hardware
+- * 14AP. we always deassert INIT during bootup
+- * 15AP. not affected - worked around in hardware
+- * 16AP. not affected - worked around in hardware
+- * 17AP. not affected - worked around in hardware
+- * 18AP. not affected - worked around in hardware
+- * 19AP. not affected - worked around in BIOS
+- *
+- * If this sounds worrying believe me these bugs are either ___RARE___,
+- * or are signal timing bugs worked around in hardware and there's
+- * about nothing of note with C stepping upwards.
+- */
+-
+-DEFINE_PER_CPU(struct tlb_state, cpu_tlbstate) ____cacheline_aligned = { &init_mm, 0, };
+-
+-/*
+- * the following functions deal with sending IPIs between CPUs.
+- *
+- * We use 'broadcast', CPU->CPU IPIs and self-IPIs too.
+- */
+-
+-static inline int __prepare_ICR (unsigned int shortcut, int vector)
+-{
+- unsigned int icr = shortcut | APIC_DEST_LOGICAL;
+-
+- switch (vector) {
+- default:
+- icr |= APIC_DM_FIXED | vector;
+- break;
+- case NMI_VECTOR:
+- icr |= APIC_DM_NMI;
+- break;
+- }
+- return icr;
+-}
+-
+-static inline int __prepare_ICR2 (unsigned int mask)
+-{
+- return SET_APIC_DEST_FIELD(mask);
+-}
+-
+-DECLARE_PER_CPU(int, ipi_to_irq[NR_IPIS]);
+-
+-static inline void __send_IPI_one(unsigned int cpu, int vector)
+-{
+- int irq = per_cpu(ipi_to_irq, cpu)[vector];
+- BUG_ON(irq < 0);
+- notify_remote_via_irq(irq);
+-}
+-
+-void __send_IPI_shortcut(unsigned int shortcut, int vector)
+-{
+- int cpu;
+-
+- switch (shortcut) {
+- case APIC_DEST_SELF:
+- __send_IPI_one(smp_processor_id(), vector);
+- break;
+- case APIC_DEST_ALLBUT:
+- for (cpu = 0; cpu < NR_CPUS; ++cpu) {
+- if (cpu == smp_processor_id())
+- continue;
+- if (cpu_isset(cpu, cpu_online_map)) {
+- __send_IPI_one(cpu, vector);
+- }
+- }
+- break;
+- default:
+- printk("XXXXXX __send_IPI_shortcut %08x vector %d\n", shortcut,
+- vector);
+- break;
+- }
+-}
+-
+-void send_IPI_self(int vector)
+-{
+- __send_IPI_shortcut(APIC_DEST_SELF, vector);
+-}
+-
+-/*
+- * This is only used on smaller machines.
+- */
+-void send_IPI_mask_bitmask(cpumask_t mask, int vector)
+-{
+- unsigned long flags;
+- unsigned int cpu;
+-
+- local_irq_save(flags);
+- WARN_ON(cpus_addr(mask)[0] & ~cpus_addr(cpu_online_map)[0]);
+-
+- for (cpu = 0; cpu < NR_CPUS; ++cpu) {
+- if (cpu_isset(cpu, mask)) {
+- __send_IPI_one(cpu, vector);
+- }
+- }
+-
+- local_irq_restore(flags);
+-}
+-
+-void send_IPI_mask_sequence(cpumask_t mask, int vector)
+-{
+-
+- send_IPI_mask_bitmask(mask, vector);
+-}
+-
+-#include <mach_ipi.h> /* must come after the send_IPI functions above for inlining */
+-
+-#if 0 /* XEN */
+-/*
+- * Smarter SMP flushing macros.
+- * c/o Linus Torvalds.
+- *
+- * These mean you can really definitely utterly forget about
+- * writing to user space from interrupts. (Its not allowed anyway).
+- *
+- * Optimizations Manfred Spraul <manfred@colorfullife.com>
+- */
+-
+-static cpumask_t flush_cpumask;
+-static struct mm_struct * flush_mm;
+-static unsigned long flush_va;
+-static DEFINE_SPINLOCK(tlbstate_lock);
+-
+-/*
+- * We cannot call mmdrop() because we are in interrupt context,
+- * instead update mm->cpu_vm_mask.
+- *
+- * We need to reload %cr3 since the page tables may be going
+- * away from under us..
+- */
+-void leave_mm(int cpu)
+-{
+- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
+- BUG();
+- cpu_clear(cpu, per_cpu(cpu_tlbstate, cpu).active_mm->cpu_vm_mask);
+- load_cr3(swapper_pg_dir);
+-}
+-EXPORT_SYMBOL_GPL(leave_mm);
+-
+-/*
+- *
+- * The flush IPI assumes that a thread switch happens in this order:
+- * [cpu0: the cpu that switches]
+- * 1) switch_mm() either 1a) or 1b)
+- * 1a) thread switch to a different mm
+- * 1a1) cpu_clear(cpu, old_mm->cpu_vm_mask);
+- * Stop ipi delivery for the old mm. This is not synchronized with
+- * the other cpus, but smp_invalidate_interrupt ignore flush ipis
+- * for the wrong mm, and in the worst case we perform a superfluous
+- * tlb flush.
+- * 1a2) set cpu_tlbstate to TLBSTATE_OK
+- * Now the smp_invalidate_interrupt won't call leave_mm if cpu0
+- * was in lazy tlb mode.
+- * 1a3) update cpu_tlbstate[].active_mm
+- * Now cpu0 accepts tlb flushes for the new mm.
+- * 1a4) cpu_set(cpu, new_mm->cpu_vm_mask);
+- * Now the other cpus will send tlb flush ipis.
+- * 1a4) change cr3.
+- * 1b) thread switch without mm change
+- * cpu_tlbstate[].active_mm is correct, cpu0 already handles
+- * flush ipis.
+- * 1b1) set cpu_tlbstate to TLBSTATE_OK
+- * 1b2) test_and_set the cpu bit in cpu_vm_mask.
+- * Atomically set the bit [other cpus will start sending flush ipis],
+- * and test the bit.
+- * 1b3) if the bit was 0: leave_mm was called, flush the tlb.
+- * 2) switch %%esp, ie current
+- *
+- * The interrupt must handle 2 special cases:
+- * - cr3 is changed before %%esp, ie. it cannot use current->{active_,}mm.
+- * - the cpu performs speculative tlb reads, i.e. even if the cpu only
+- * runs in kernel space, the cpu could load tlb entries for user space
+- * pages.
+- *
+- * The good news is that cpu_tlbstate is local to each cpu, no
+- * write/read ordering problems.
+- */
+-
+-/*
+- * TLB flush IPI:
+- *
+- * 1) Flush the tlb entries if the cpu uses the mm that's being flushed.
+- * 2) Leave the mm if we are in the lazy tlb mode.
+- */
+-
+-irqreturn_t smp_invalidate_interrupt(int irq, void *dev_id)
+-{
+- unsigned long cpu;
+-
+- cpu = get_cpu();
+-
+- if (!cpu_isset(cpu, flush_cpumask))
+- goto out;
+- /*
+- * This was a BUG() but until someone can quote me the
+- * line from the intel manual that guarantees an IPI to
+- * multiple CPUs is retried _only_ on the erroring CPUs
+- * its staying as a return
+- *
+- * BUG();
+- */
+-
+- if (flush_mm == per_cpu(cpu_tlbstate, cpu).active_mm) {
+- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK) {
+- if (flush_va == TLB_FLUSH_ALL)
+- local_flush_tlb();
+- else
+- __flush_tlb_one(flush_va);
+- } else
+- leave_mm(cpu);
+- }
+- smp_mb__before_clear_bit();
+- cpu_clear(cpu, flush_cpumask);
+- smp_mb__after_clear_bit();
+-out:
+- put_cpu_no_resched();
+- __get_cpu_var(irq_stat).irq_tlb_count++;
+-
+- return IRQ_HANDLED;
+-}
+-
+-void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
+- unsigned long va)
+-{
+- cpumask_t cpumask = *cpumaskp;
+-
+- /*
+- * A couple of (to be removed) sanity checks:
+- *
+- * - current CPU must not be in mask
+- * - mask must exist :)
+- */
+- BUG_ON(cpus_empty(cpumask));
+- BUG_ON(cpu_isset(smp_processor_id(), cpumask));
+- BUG_ON(!mm);
+-
+-#ifdef CONFIG_HOTPLUG_CPU
+- /* If a CPU which we ran on has gone down, OK. */
+- cpus_and(cpumask, cpumask, cpu_online_map);
+- if (unlikely(cpus_empty(cpumask)))
+- return;
+-#endif
+-
+- /*
+- * i'm not happy about this global shared spinlock in the
+- * MM hot path, but we'll see how contended it is.
+- * AK: x86-64 has a faster method that could be ported.
+- */
+- spin_lock(&tlbstate_lock);
+-
+- flush_mm = mm;
+- flush_va = va;
+- cpus_or(flush_cpumask, cpumask, flush_cpumask);
+- /*
+- * We have to send the IPI only to
+- * CPUs affected.
+- */
+- send_IPI_mask(cpumask, INVALIDATE_TLB_VECTOR);
+-
+- while (!cpus_empty(flush_cpumask))
+- /* nothing. lockup detection does not belong here */
+- cpu_relax();
+-
+- flush_mm = NULL;
+- flush_va = 0;
+- spin_unlock(&tlbstate_lock);
+-}
+-
+-void flush_tlb_current_task(void)
+-{
+- struct mm_struct *mm = current->mm;
+- cpumask_t cpu_mask;
+-
+- preempt_disable();
+- cpu_mask = mm->cpu_vm_mask;
+- cpu_clear(smp_processor_id(), cpu_mask);
+-
+- local_flush_tlb();
+- if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, TLB_FLUSH_ALL);
+- preempt_enable();
+-}
+-
+-void flush_tlb_mm (struct mm_struct * mm)
+-{
+- cpumask_t cpu_mask;
+-
+- preempt_disable();
+- cpu_mask = mm->cpu_vm_mask;
+- cpu_clear(smp_processor_id(), cpu_mask);
+-
+- if (current->active_mm == mm) {
+- if (current->mm)
+- local_flush_tlb();
+- else
+- leave_mm(smp_processor_id());
+- }
+- if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, TLB_FLUSH_ALL);
+-
+- preempt_enable();
+-}
+-
+-void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
+-{
+- struct mm_struct *mm = vma->vm_mm;
+- cpumask_t cpu_mask;
+-
+- preempt_disable();
+- cpu_mask = mm->cpu_vm_mask;
+- cpu_clear(smp_processor_id(), cpu_mask);
+-
+- if (current->active_mm == mm) {
+- if(current->mm)
+- __flush_tlb_one(va);
+- else
+- leave_mm(smp_processor_id());
+- }
+-
+- if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, va);
+-
+- preempt_enable();
+-}
+-EXPORT_SYMBOL(flush_tlb_page);
+-
+-static void do_flush_tlb_all(void* info)
+-{
+- unsigned long cpu = smp_processor_id();
+-
+- __flush_tlb_all();
+- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_LAZY)
+- leave_mm(cpu);
+-}
+-
+-void flush_tlb_all(void)
+-{
+- on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
+-}
+-
+-#endif /* XEN */
+-
+-/*
+- * this function sends a 'reschedule' IPI to another CPU.
+- * it goes straight through and wastes no time serializing
+- * anything. Worst case is that we lose a reschedule ...
+- */
+-void xen_smp_send_reschedule(int cpu)
+-{
+- WARN_ON(cpu_is_offline(cpu));
+- send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
+-}
+-
+-/*
+- * Structure and data for smp_call_function(). This is designed to minimise
+- * static memory requirements. It also looks cleaner.
+- */
+-static DEFINE_SPINLOCK(call_lock);
+-
+-struct call_data_struct {
+- void (*func) (void *info);
+- void *info;
+- atomic_t started;
+- atomic_t finished;
+- int wait;
+-};
+-
+-void lock_ipi_call_lock(void)
+-{
+- spin_lock_irq(&call_lock);
+-}
+-
+-void unlock_ipi_call_lock(void)
+-{
+- spin_unlock_irq(&call_lock);
+-}
+-
+-static struct call_data_struct *call_data;
+-
+-static void __smp_call_function(void (*func) (void *info), void *info,
+- int nonatomic, int wait)
+-{
+- struct call_data_struct data;
+- int cpus = num_online_cpus() - 1;
+-
+- if (!cpus)
+- return;
+-
+- data.func = func;
+- data.info = info;
+- atomic_set(&data.started, 0);
+- data.wait = wait;
+- if (wait)
+- atomic_set(&data.finished, 0);
+-
+- call_data = &data;
+- mb();
+-
+- /* Send a message to all other CPUs and wait for them to respond */
+- send_IPI_allbutself(CALL_FUNCTION_VECTOR);
+-
+- /* Wait for response */
+- while (atomic_read(&data.started) != cpus)
+- cpu_relax();
+-
+- if (wait)
+- while (atomic_read(&data.finished) != cpus)
+- cpu_relax();
+-}
+-
+-
+-/**
+- * smp_call_function_mask(): Run a function on a set of other CPUs.
+- * @mask: The set of cpus to run on. Must not include the current cpu.
+- * @func: The function to run. This must be fast and non-blocking.
+- * @info: An arbitrary pointer to pass to the function.
+- * @wait: If true, wait (atomically) until function has completed on other CPUs.
+- *
+- * Returns 0 on success, else a negative status code.
+- *
+- * If @wait is true, then returns once @func has returned; otherwise
+- * it returns just before the target cpu calls @func.
+- *
+- * You must not call this function with disabled interrupts or from a
+- * hardware interrupt handler or from a bottom half handler.
+- */
+-int
+-xen_smp_call_function_mask(cpumask_t mask,
+- void (*func)(void *), void *info,
+- int wait)
+-{
+- struct call_data_struct data;
+- cpumask_t allbutself;
+- int cpus;
+-
+- /* Can deadlock when called with interrupts disabled */
+- WARN_ON(irqs_disabled());
+-
+- /* Holding any lock stops cpus from going down. */
+- spin_lock(&call_lock);
+-
+- allbutself = cpu_online_map;
+- cpu_clear(smp_processor_id(), allbutself);
+-
+- cpus_and(mask, mask, allbutself);
+- cpus = cpus_weight(mask);
+-
+- if (!cpus) {
+- spin_unlock(&call_lock);
+- return 0;
+- }
+-
+- data.func = func;
+- data.info = info;
+- atomic_set(&data.started, 0);
+- data.wait = wait;
+- if (wait)
+- atomic_set(&data.finished, 0);
+-
+- call_data = &data;
+- mb();
+-
+- /* Send a message to other CPUs */
+- if (cpus_equal(mask, allbutself))
+- send_IPI_allbutself(CALL_FUNCTION_VECTOR);
+- else
+- send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
+-
+- /* Wait for response */
+- while (atomic_read(&data.started) != cpus)
+- cpu_relax();
+-
+- if (wait)
+- while (atomic_read(&data.finished) != cpus)
+- cpu_relax();
+- spin_unlock(&call_lock);
+-
+- return 0;
+-}
+-
+-static void stop_this_cpu (void * dummy)
+-{
+- local_irq_disable();
+- /*
+- * Remove this CPU:
+- */
+- cpu_clear(smp_processor_id(), cpu_online_map);
+- disable_all_local_evtchn();
+- if (cpu_data(smp_processor_id()).hlt_works_ok)
+- for(;;) halt();
+- for (;;);
+-}
+-
+-/*
+- * this function calls the 'stop' function on all other CPUs in the system.
+- */
+-
+-void xen_smp_send_stop(void)
+-{
+- /* Don't deadlock on the call lock in panic */
+- int nolock = !spin_trylock(&call_lock);
+- unsigned long flags;
+-
+- local_irq_save(flags);
+- __smp_call_function(stop_this_cpu, NULL, 0, 0);
+- if (!nolock)
+- spin_unlock(&call_lock);
+- disable_all_local_evtchn();
+- local_irq_restore(flags);
+-}
+-
+-/*
+- * Reschedule call back. Nothing to do,
+- * all the work is done automatically when
+- * we return from the interrupt.
+- */
+-irqreturn_t smp_reschedule_interrupt(int irq, void *dev_id)
+-{
+- __get_cpu_var(irq_stat).irq_resched_count++;
+-
+- return IRQ_HANDLED;
+-}
+-
+-#include <linux/kallsyms.h>
+-irqreturn_t smp_call_function_interrupt(int irq, void *dev_id)
+-{
+- void (*func) (void *info) = call_data->func;
+- void *info = call_data->info;
+- int wait = call_data->wait;
+-
+- /*
+- * Notify initiating CPU that I've grabbed the data and am
+- * about to execute the function
+- */
+- mb();
+- atomic_inc(&call_data->started);
+- /*
+- * At this point the info structure may be out of scope unless wait==1
+- */
+- irq_enter();
+- (*func)(info);
+- __get_cpu_var(irq_stat).irq_call_count++;
+- irq_exit();
+-
+- if (wait) {
+- mb();
+- atomic_inc(&call_data->finished);
+- }
+-
+- return IRQ_HANDLED;
+-}
+--- a/arch/x86/kernel/smp_64-xen.c
++++ /dev/null
+@@ -1,554 +0,0 @@
+-/*
+- * Intel SMP support routines.
+- *
+- * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
+- * (c) 1998-99, 2000 Ingo Molnar <mingo@redhat.com>
+- * (c) 2002,2003 Andi Kleen, SuSE Labs.
+- *
+- * This code is released under the GNU General Public License version 2 or
+- * later.
+- */
+-
+-#include <linux/init.h>
+-
+-#include <linux/mm.h>
+-#include <linux/delay.h>
+-#include <linux/spinlock.h>
+-#include <linux/smp.h>
+-#include <linux/kernel_stat.h>
+-#include <linux/mc146818rtc.h>
+-#include <linux/interrupt.h>
+-
+-#include <asm/mtrr.h>
+-#include <asm/pgalloc.h>
+-#include <asm/tlbflush.h>
+-#include <asm/mach_apic.h>
+-#include <asm/mmu_context.h>
+-#include <asm/proto.h>
+-#include <asm/apicdef.h>
+-#include <asm/idle.h>
+-#ifdef CONFIG_XEN
+-#include <xen/evtchn.h>
+-#endif
+-
+-#ifndef CONFIG_XEN
+-/*
+- * Smarter SMP flushing macros.
+- * c/o Linus Torvalds.
+- *
+- * These mean you can really definitely utterly forget about
+- * writing to user space from interrupts. (Its not allowed anyway).
+- *
+- * Optimizations Manfred Spraul <manfred@colorfullife.com>
+- *
+- * More scalable flush, from Andi Kleen
+- *
+- * To avoid global state use 8 different call vectors.
+- * Each CPU uses a specific vector to trigger flushes on other
+- * CPUs. Depending on the received vector the target CPUs look into
+- * the right per cpu variable for the flush data.
+- *
+- * With more than 8 CPUs they are hashed to the 8 available
+- * vectors. The limited global vector space forces us to this right now.
+- * In future when interrupts are split into per CPU domains this could be
+- * fixed, at the cost of triggering multiple IPIs in some cases.
+- */
+-
+-union smp_flush_state {
+- struct {
+- cpumask_t flush_cpumask;
+- struct mm_struct *flush_mm;
+- unsigned long flush_va;
+- spinlock_t tlbstate_lock;
+- };
+- char pad[SMP_CACHE_BYTES];
+-} ____cacheline_aligned;
+-
+-/* State is put into the per CPU data section, but padded
+- to a full cache line because other CPUs can access it and we don't
+- want false sharing in the per cpu data segment. */
+-static DEFINE_PER_CPU(union smp_flush_state, flush_state);
+-
+-/*
+- * We cannot call mmdrop() because we are in interrupt context,
+- * instead update mm->cpu_vm_mask.
+- */
+-void leave_mm(int cpu)
+-{
+- if (read_pda(mmu_state) == TLBSTATE_OK)
+- BUG();
+- cpu_clear(cpu, read_pda(active_mm)->cpu_vm_mask);
+- load_cr3(swapper_pg_dir);
+-}
+-EXPORT_SYMBOL_GPL(leave_mm);
+-
+-/*
+- *
+- * The flush IPI assumes that a thread switch happens in this order:
+- * [cpu0: the cpu that switches]
+- * 1) switch_mm() either 1a) or 1b)
+- * 1a) thread switch to a different mm
+- * 1a1) cpu_clear(cpu, old_mm->cpu_vm_mask);
+- * Stop ipi delivery for the old mm. This is not synchronized with
+- * the other cpus, but smp_invalidate_interrupt ignore flush ipis
+- * for the wrong mm, and in the worst case we perform a superfluous
+- * tlb flush.
+- * 1a2) set cpu mmu_state to TLBSTATE_OK
+- * Now the smp_invalidate_interrupt won't call leave_mm if cpu0
+- * was in lazy tlb mode.
+- * 1a3) update cpu active_mm
+- * Now cpu0 accepts tlb flushes for the new mm.
+- * 1a4) cpu_set(cpu, new_mm->cpu_vm_mask);
+- * Now the other cpus will send tlb flush ipis.
+- * 1a4) change cr3.
+- * 1b) thread switch without mm change
+- * cpu active_mm is correct, cpu0 already handles
+- * flush ipis.
+- * 1b1) set cpu mmu_state to TLBSTATE_OK
+- * 1b2) test_and_set the cpu bit in cpu_vm_mask.
+- * Atomically set the bit [other cpus will start sending flush ipis],
+- * and test the bit.
+- * 1b3) if the bit was 0: leave_mm was called, flush the tlb.
+- * 2) switch %%esp, ie current
+- *
+- * The interrupt must handle 2 special cases:
+- * - cr3 is changed before %%esp, ie. it cannot use current->{active_,}mm.
+- * - the cpu performs speculative tlb reads, i.e. even if the cpu only
+- * runs in kernel space, the cpu could load tlb entries for user space
+- * pages.
+- *
+- * The good news is that cpu mmu_state is local to each cpu, no
+- * write/read ordering problems.
+- */
+-
+-/*
+- * TLB flush IPI:
+- *
+- * 1) Flush the tlb entries if the cpu uses the mm that's being flushed.
+- * 2) Leave the mm if we are in the lazy tlb mode.
+- *
+- * Interrupts are disabled.
+- */
+-
+-asmlinkage void smp_invalidate_interrupt(struct pt_regs *regs)
+-{
+- int cpu;
+- int sender;
+- union smp_flush_state *f;
+-
+- cpu = smp_processor_id();
+- /*
+- * orig_rax contains the negated interrupt vector.
+- * Use that to determine where the sender put the data.
+- */
+- sender = ~regs->orig_ax - INVALIDATE_TLB_VECTOR_START;
+- f = &per_cpu(flush_state, sender);
+-
+- if (!cpu_isset(cpu, f->flush_cpumask))
+- goto out;
+- /*
+- * This was a BUG() but until someone can quote me the
+- * line from the intel manual that guarantees an IPI to
+- * multiple CPUs is retried _only_ on the erroring CPUs
+- * its staying as a return
+- *
+- * BUG();
+- */
+-
+- if (f->flush_mm == read_pda(active_mm)) {
+- if (read_pda(mmu_state) == TLBSTATE_OK) {
+- if (f->flush_va == TLB_FLUSH_ALL)
+- local_flush_tlb();
+- else
+- __flush_tlb_one(f->flush_va);
+- } else
+- leave_mm(cpu);
+- }
+-out:
+- ack_APIC_irq();
+- cpu_clear(cpu, f->flush_cpumask);
+- add_pda(irq_tlb_count, 1);
+-}
+-
+-void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
+- unsigned long va)
+-{
+- int sender;
+- union smp_flush_state *f;
+- cpumask_t cpumask = *cpumaskp;
+-
+- /* Caller has disabled preemption */
+- sender = smp_processor_id() % NUM_INVALIDATE_TLB_VECTORS;
+- f = &per_cpu(flush_state, sender);
+-
+- /*
+- * Could avoid this lock when
+- * num_online_cpus() <= NUM_INVALIDATE_TLB_VECTORS, but it is
+- * probably not worth checking this for a cache-hot lock.
+- */
+- spin_lock(&f->tlbstate_lock);
+-
+- f->flush_mm = mm;
+- f->flush_va = va;
+- cpus_or(f->flush_cpumask, cpumask, f->flush_cpumask);
+-
+- /*
+- * We have to send the IPI only to
+- * CPUs affected.
+- */
+- send_IPI_mask(cpumask, INVALIDATE_TLB_VECTOR_START + sender);
+-
+- while (!cpus_empty(f->flush_cpumask))
+- cpu_relax();
+-
+- f->flush_mm = NULL;
+- f->flush_va = 0;
+- spin_unlock(&f->tlbstate_lock);
+-}
+-
+-int __cpuinit init_smp_flush(void)
+-{
+- int i;
+-
+- for_each_cpu_mask(i, cpu_possible_map) {
+- spin_lock_init(&per_cpu(flush_state, i).tlbstate_lock);
+- }
+- return 0;
+-}
+-core_initcall(init_smp_flush);
+-
+-void flush_tlb_current_task(void)
+-{
+- struct mm_struct *mm = current->mm;
+- cpumask_t cpu_mask;
+-
+- preempt_disable();
+- cpu_mask = mm->cpu_vm_mask;
+- cpu_clear(smp_processor_id(), cpu_mask);
+-
+- local_flush_tlb();
+- if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, TLB_FLUSH_ALL);
+- preempt_enable();
+-}
+-
+-void flush_tlb_mm (struct mm_struct * mm)
+-{
+- cpumask_t cpu_mask;
+-
+- preempt_disable();
+- cpu_mask = mm->cpu_vm_mask;
+- cpu_clear(smp_processor_id(), cpu_mask);
+-
+- if (current->active_mm == mm) {
+- if (current->mm)
+- local_flush_tlb();
+- else
+- leave_mm(smp_processor_id());
+- }
+- if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, TLB_FLUSH_ALL);
+-
+- preempt_enable();
+-}
+-
+-void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
+-{
+- struct mm_struct *mm = vma->vm_mm;
+- cpumask_t cpu_mask;
+-
+- preempt_disable();
+- cpu_mask = mm->cpu_vm_mask;
+- cpu_clear(smp_processor_id(), cpu_mask);
+-
+- if (current->active_mm == mm) {
+- if(current->mm)
+- __flush_tlb_one(va);
+- else
+- leave_mm(smp_processor_id());
+- }
+-
+- if (!cpus_empty(cpu_mask))
+- flush_tlb_others(cpu_mask, mm, va);
+-
+- preempt_enable();
+-}
+-
+-static void do_flush_tlb_all(void* info)
+-{
+- unsigned long cpu = smp_processor_id();
+-
+- __flush_tlb_all();
+- if (read_pda(mmu_state) == TLBSTATE_LAZY)
+- leave_mm(cpu);
+-}
+-
+-void flush_tlb_all(void)
+-{
+- on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
+-}
+-#endif /* Xen */
+-
+-/*
+- * this function sends a 'reschedule' IPI to another CPU.
+- * it goes straight through and wastes no time serializing
+- * anything. Worst case is that we lose a reschedule ...
+- */
+-
+-void smp_send_reschedule(int cpu)
+-{
+- send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
+-}
+-
+-/*
+- * Structure and data for smp_call_function(). This is designed to minimise
+- * static memory requirements. It also looks cleaner.
+- */
+-static DEFINE_SPINLOCK(call_lock);
+-
+-struct call_data_struct {
+- void (*func) (void *info);
+- void *info;
+- atomic_t started;
+- atomic_t finished;
+- int wait;
+-};
+-
+-static struct call_data_struct * call_data;
+-
+-void lock_ipi_call_lock(void)
+-{
+- spin_lock_irq(&call_lock);
+-}
+-
+-void unlock_ipi_call_lock(void)
+-{
+- spin_unlock_irq(&call_lock);
+-}
+-
+-/*
+- * this function sends a 'generic call function' IPI to all other CPU
+- * of the system defined in the mask.
+- */
+-static int __smp_call_function_mask(cpumask_t mask,
+- void (*func)(void *), void *info,
+- int wait)
+-{
+- struct call_data_struct data;
+- cpumask_t allbutself;
+- int cpus;
+-
+- allbutself = cpu_online_map;
+- cpu_clear(smp_processor_id(), allbutself);
+-
+- cpus_and(mask, mask, allbutself);
+- cpus = cpus_weight(mask);
+-
+- if (!cpus)
+- return 0;
+-
+- data.func = func;
+- data.info = info;
+- atomic_set(&data.started, 0);
+- data.wait = wait;
+- if (wait)
+- atomic_set(&data.finished, 0);
+-
+- call_data = &data;
+- wmb();
+-
+- /* Send a message to other CPUs */
+- if (cpus_equal(mask, allbutself))
+- send_IPI_allbutself(CALL_FUNCTION_VECTOR);
+- else
+- send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
+-
+- /* Wait for response */
+- while (atomic_read(&data.started) != cpus)
+- cpu_relax();
+-
+- if (!wait)
+- return 0;
+-
+- while (atomic_read(&data.finished) != cpus)
+- cpu_relax();
+-
+- return 0;
+-}
+-/**
+- * smp_call_function_mask(): Run a function on a set of other CPUs.
+- * @mask: The set of cpus to run on. Must not include the current cpu.
+- * @func: The function to run. This must be fast and non-blocking.
+- * @info: An arbitrary pointer to pass to the function.
+- * @wait: If true, wait (atomically) until function has completed on other CPUs.
+- *
+- * Returns 0 on success, else a negative status code.
+- *
+- * If @wait is true, then returns once @func has returned; otherwise
+- * it returns just before the target cpu calls @func.
+- *
+- * You must not call this function with disabled interrupts or from a
+- * hardware interrupt handler or from a bottom half handler.
+- */
+-int smp_call_function_mask(cpumask_t mask,
+- void (*func)(void *), void *info,
+- int wait)
+-{
+- int ret;
+-
+- /* Can deadlock when called with interrupts disabled */
+- WARN_ON(irqs_disabled());
+-
+- spin_lock(&call_lock);
+- ret = __smp_call_function_mask(mask, func, info, wait);
+- spin_unlock(&call_lock);
+- return ret;
+-}
+-EXPORT_SYMBOL(smp_call_function_mask);
+-
+-/*
+- * smp_call_function_single - Run a function on a specific CPU
+- * @func: The function to run. This must be fast and non-blocking.
+- * @info: An arbitrary pointer to pass to the function.
+- * @nonatomic: Currently unused.
+- * @wait: If true, wait until function has completed on other CPUs.
+- *
+- * Retrurns 0 on success, else a negative status code.
+- *
+- * Does not return until the remote CPU is nearly ready to execute <func>
+- * or is or has executed.
+- */
+-
+-int smp_call_function_single (int cpu, void (*func) (void *info), void *info,
+- int nonatomic, int wait)
+-{
+- /* prevent preemption and reschedule on another processor */
+- int ret, me = get_cpu();
+-
+- /* Can deadlock when called with interrupts disabled */
+- WARN_ON(irqs_disabled());
+-
+- if (cpu == me) {
+- local_irq_disable();
+- func(info);
+- local_irq_enable();
+- put_cpu();
+- return 0;
+- }
+-
+- ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, wait);
+-
+- put_cpu();
+- return ret;
+-}
+-EXPORT_SYMBOL(smp_call_function_single);
+-
+-/*
+- * smp_call_function - run a function on all other CPUs.
+- * @func: The function to run. This must be fast and non-blocking.
+- * @info: An arbitrary pointer to pass to the function.
+- * @nonatomic: currently unused.
+- * @wait: If true, wait (atomically) until function has completed on other
+- * CPUs.
+- *
+- * Returns 0 on success, else a negative status code. Does not return until
+- * remote CPUs are nearly ready to execute func or are or have executed.
+- *
+- * You must not call this function with disabled interrupts or from a
+- * hardware interrupt handler or from a bottom half handler.
+- * Actually there are a few legal cases, like panic.
+- */
+-int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
+- int wait)
+-{
+- return smp_call_function_mask(cpu_online_map, func, info, wait);
+-}
+-EXPORT_SYMBOL(smp_call_function);
+-
+-static void stop_this_cpu(void *dummy)
+-{
+- local_irq_disable();
+- /*
+- * Remove this CPU:
+- */
+- cpu_clear(smp_processor_id(), cpu_online_map);
+- disable_all_local_evtchn();
+- for (;;)
+- halt();
+-}
+-
+-void smp_send_stop(void)
+-{
+- int nolock;
+- unsigned long flags;
+-
+-#ifndef CONFIG_XEN
+- if (reboot_force)
+- return;
+-#endif
+-
+- /* Don't deadlock on the call lock in panic */
+- nolock = !spin_trylock(&call_lock);
+- local_irq_save(flags);
+- __smp_call_function_mask(cpu_online_map, stop_this_cpu, NULL, 0);
+- if (!nolock)
+- spin_unlock(&call_lock);
+- disable_all_local_evtchn();
+- local_irq_restore(flags);
+-}
+-
+-/*
+- * Reschedule call back. Nothing to do,
+- * all the work is done automatically when
+- * we return from the interrupt.
+- */
+-#ifndef CONFIG_XEN
+-asmlinkage void smp_reschedule_interrupt(void)
+-#else
+-asmlinkage irqreturn_t smp_reschedule_interrupt(int irq, void *ctx)
+-#endif
+-{
+-#ifndef CONFIG_XEN
+- ack_APIC_irq();
+-#endif
+- add_pda(irq_resched_count, 1);
+-#ifdef CONFIG_XEN
+- return IRQ_HANDLED;
+-#endif
+-}
+-
+-#ifndef CONFIG_XEN
+-asmlinkage void smp_call_function_interrupt(void)
+-#else
+-asmlinkage irqreturn_t smp_call_function_interrupt(int irq, void *ctx)
+-#endif
+-{
+- void (*func) (void *info) = call_data->func;
+- void *info = call_data->info;
+- int wait = call_data->wait;
+-
+-#ifndef CONFIG_XEN
+- ack_APIC_irq();
+-#endif
+- /*
+- * Notify initiating CPU that I've grabbed the data and am
+- * about to execute the function
+- */
+- mb();
+- atomic_inc(&call_data->started);
+- /*
+- * At this point the info structure may be out of scope unless wait==1
+- */
+- exit_idle();
+- irq_enter();
+- (*func)(info);
+- add_pda(irq_call_count, 1);
+- irq_exit();
+- if (wait) {
+- mb();
+- atomic_inc(&call_data->finished);
+- }
+-#ifdef CONFIG_XEN
+- return IRQ_HANDLED;
+-#endif
+-}
+--- /dev/null
++++ b/arch/x86/kernel/smp-xen.c
+@@ -0,0 +1,329 @@
++/*
++ * Intel SMP support routines.
++ *
++ * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
++ * (c) 1998-99, 2000 Ingo Molnar <mingo@redhat.com>
++ * (c) 2002,2003 Andi Kleen, SuSE Labs.
++ *
++ * i386 and x86_64 integration by Glauber Costa <gcosta@redhat.com>
++ *
++ * This code is released under the GNU General Public License version 2 or
++ * later.
++ */
++
++#include <linux/init.h>
++
++#include <linux/mm.h>
++#include <linux/delay.h>
++#include <linux/spinlock.h>
++#include <linux/kernel_stat.h>
++#include <linux/mc146818rtc.h>
++#include <linux/cache.h>
++#include <linux/interrupt.h>
++#include <linux/cpu.h>
++
++#include <asm/mtrr.h>
++#include <asm/tlbflush.h>
++#include <asm/mmu_context.h>
++#include <asm/proto.h>
++#include <mach_ipi.h>
++#include <xen/evtchn.h>
++/*
++ * Some notes on x86 processor bugs affecting SMP operation:
++ *
++ * Pentium, Pentium Pro, II, III (and all CPUs) have bugs.
++ * The Linux implications for SMP are handled as follows:
++ *
++ * Pentium III / [Xeon]
++ * None of the E1AP-E3AP errata are visible to the user.
++ *
++ * E1AP. see PII A1AP
++ * E2AP. see PII A2AP
++ * E3AP. see PII A3AP
++ *
++ * Pentium II / [Xeon]
++ * None of the A1AP-A3AP errata are visible to the user.
++ *
++ * A1AP. see PPro 1AP
++ * A2AP. see PPro 2AP
++ * A3AP. see PPro 7AP
++ *
++ * Pentium Pro
++ * None of 1AP-9AP errata are visible to the normal user,
++ * except occasional delivery of 'spurious interrupt' as trap #15.
++ * This is very rare and a non-problem.
++ *
++ * 1AP. Linux maps APIC as non-cacheable
++ * 2AP. worked around in hardware
++ * 3AP. fixed in C0 and above steppings microcode update.
++ * Linux does not use excessive STARTUP_IPIs.
++ * 4AP. worked around in hardware
++ * 5AP. symmetric IO mode (normal Linux operation) not affected.
++ * 'noapic' mode has vector 0xf filled out properly.
++ * 6AP. 'noapic' mode might be affected - fixed in later steppings
++ * 7AP. We do not assume writes to the LVT deassering IRQs
++ * 8AP. We do not enable low power mode (deep sleep) during MP bootup
++ * 9AP. We do not use mixed mode
++ *
++ * Pentium
++ * There is a marginal case where REP MOVS on 100MHz SMP
++ * machines with B stepping processors can fail. XXX should provide
++ * an L1cache=Writethrough or L1cache=off option.
++ *
++ * B stepping CPUs may hang. There are hardware work arounds
++ * for this. We warn about it in case your board doesn't have the work
++ * arounds. Basically that's so I can tell anyone with a B stepping
++ * CPU and SMP problems "tough".
++ *
++ * Specific items [From Pentium Processor Specification Update]
++ *
++ * 1AP. Linux doesn't use remote read
++ * 2AP. Linux doesn't trust APIC errors
++ * 3AP. We work around this
++ * 4AP. Linux never generated 3 interrupts of the same priority
++ * to cause a lost local interrupt.
++ * 5AP. Remote read is never used
++ * 6AP. not affected - worked around in hardware
++ * 7AP. not affected - worked around in hardware
++ * 8AP. worked around in hardware - we get explicit CS errors if not
++ * 9AP. only 'noapic' mode affected. Might generate spurious
++ * interrupts, we log only the first one and count the
++ * rest silently.
++ * 10AP. not affected - worked around in hardware
++ * 11AP. Linux reads the APIC between writes to avoid this, as per
++ * the documentation. Make sure you preserve this as it affects
++ * the C stepping chips too.
++ * 12AP. not affected - worked around in hardware
++ * 13AP. not affected - worked around in hardware
++ * 14AP. we always deassert INIT during bootup
++ * 15AP. not affected - worked around in hardware
++ * 16AP. not affected - worked around in hardware
++ * 17AP. not affected - worked around in hardware
++ * 18AP. not affected - worked around in hardware
++ * 19AP. not affected - worked around in BIOS
++ *
++ * If this sounds worrying believe me these bugs are either ___RARE___,
++ * or are signal timing bugs worked around in hardware and there's
++ * about nothing of note with C stepping upwards.
++ */
++
++/*
++ * this function sends a 'reschedule' IPI to another CPU.
++ * it goes straight through and wastes no time serializing
++ * anything. Worst case is that we lose a reschedule ...
++ */
++void xen_smp_send_reschedule(int cpu)
++{
++ if (unlikely(cpu_is_offline(cpu))) {
++ WARN_ON(1);
++ return;
++ }
++ send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
++}
++
++/*
++ * Structure and data for smp_call_function(). This is designed to minimise
++ * static memory requirements. It also looks cleaner.
++ */
++static DEFINE_SPINLOCK(call_lock);
++
++struct call_data_struct {
++ void (*func) (void *info);
++ void *info;
++ atomic_t started;
++ atomic_t finished;
++ int wait;
++};
++
++void lock_ipi_call_lock(void)
++{
++ spin_lock_irq(&call_lock);
++}
++
++void unlock_ipi_call_lock(void)
++{
++ spin_unlock_irq(&call_lock);
++}
++
++static struct call_data_struct *call_data;
++
++static void __smp_call_function(void (*func) (void *info), void *info,
++ int nonatomic, int wait)
++{
++ struct call_data_struct data;
++ int cpus = num_online_cpus() - 1;
++
++ if (!cpus)
++ return;
++
++ data.func = func;
++ data.info = info;
++ atomic_set(&data.started, 0);
++ data.wait = wait;
++ if (wait)
++ atomic_set(&data.finished, 0);
++
++ call_data = &data;
++ mb();
++
++ /* Send a message to all other CPUs and wait for them to respond */
++ send_IPI_allbutself(CALL_FUNCTION_VECTOR);
++
++ /* Wait for response */
++ while (atomic_read(&data.started) != cpus)
++ cpu_relax();
++
++ if (wait)
++ while (atomic_read(&data.finished) != cpus)
++ cpu_relax();
++}
++
++
++/**
++ * smp_call_function_mask(): Run a function on a set of other CPUs.
++ * @mask: The set of cpus to run on. Must not include the current cpu.
++ * @func: The function to run. This must be fast and non-blocking.
++ * @info: An arbitrary pointer to pass to the function.
++ * @wait: If true, wait (atomically) until function has completed on other CPUs.
++ *
++ * Returns 0 on success, else a negative status code.
++ *
++ * If @wait is true, then returns once @func has returned; otherwise
++ * it returns just before the target cpu calls @func.
++ *
++ * You must not call this function with disabled interrupts or from a
++ * hardware interrupt handler or from a bottom half handler.
++ */
++int
++xen_smp_call_function_mask(cpumask_t mask,
++ void (*func)(void *), void *info,
++ int wait)
++{
++ struct call_data_struct data;
++ cpumask_t allbutself;
++ int cpus;
++
++ /* Can deadlock when called with interrupts disabled */
++ WARN_ON(irqs_disabled());
++
++ /* Holding any lock stops cpus from going down. */
++ spin_lock(&call_lock);
++
++ allbutself = cpu_online_map;
++ cpu_clear(smp_processor_id(), allbutself);
++
++ cpus_and(mask, mask, allbutself);
++ cpus = cpus_weight(mask);
++
++ if (!cpus) {
++ spin_unlock(&call_lock);
++ return 0;
++ }
++
++ data.func = func;
++ data.info = info;
++ atomic_set(&data.started, 0);
++ data.wait = wait;
++ if (wait)
++ atomic_set(&data.finished, 0);
++
++ call_data = &data;
++ wmb();
++
++ /* Send a message to other CPUs */
++ if (cpus_equal(mask, allbutself) &&
++ cpus_equal(cpu_online_map, cpu_callout_map))
++ send_IPI_allbutself(CALL_FUNCTION_VECTOR);
++ else
++ send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
++
++ /* Wait for response */
++ while (atomic_read(&data.started) != cpus)
++ cpu_relax();
++
++ if (wait)
++ while (atomic_read(&data.finished) != cpus)
++ cpu_relax();
++ spin_unlock(&call_lock);
++
++ return 0;
++}
++
++static void stop_this_cpu(void *dummy)
++{
++ local_irq_disable();
++ /*
++ * Remove this CPU:
++ */
++ cpu_clear(smp_processor_id(), cpu_online_map);
++ disable_all_local_evtchn();
++ if (hlt_works(smp_processor_id()))
++ for (;;) halt();
++ for (;;);
++}
++
++/*
++ * this function calls the 'stop' function on all other CPUs in the system.
++ */
++
++void xen_smp_send_stop(void)
++{
++ int nolock;
++ unsigned long flags;
++
++ /* Don't deadlock on the call lock in panic */
++ nolock = !spin_trylock(&call_lock);
++ local_irq_save(flags);
++ __smp_call_function(stop_this_cpu, NULL, 0, 0);
++ if (!nolock)
++ spin_unlock(&call_lock);
++ disable_all_local_evtchn();
++ local_irq_restore(flags);
++}
++
++/*
++ * Reschedule call back. Nothing to do,
++ * all the work is done automatically when
++ * we return from the interrupt.
++ */
++irqreturn_t smp_reschedule_interrupt(int irq, void *dev_id)
++{
++#ifdef CONFIG_X86_32
++ __get_cpu_var(irq_stat).irq_resched_count++;
++#else
++ add_pda(irq_resched_count, 1);
++#endif
++ return IRQ_HANDLED;
++}
++
++irqreturn_t smp_call_function_interrupt(int irq, void *dev_id)
++{
++ void (*func) (void *info) = call_data->func;
++ void *info = call_data->info;
++ int wait = call_data->wait;
++
++ /*
++ * Notify initiating CPU that I've grabbed the data and am
++ * about to execute the function
++ */
++ mb();
++ atomic_inc(&call_data->started);
++ /*
++ * At this point the info structure may be out of scope unless wait==1
++ */
++ irq_enter();
++ (*func)(info);
++#ifdef CONFIG_X86_32
++ __get_cpu_var(irq_stat).irq_call_count++;
++#else
++ add_pda(irq_call_count, 1);
++#endif
++ irq_exit();
++
++ if (wait) {
++ mb();
++ atomic_inc(&call_data->finished);
++ }
++
++ return IRQ_HANDLED;
++}
+--- a/arch/x86/kernel/time_32-xen.c
++++ b/arch/x86/kernel/time_32-xen.c
+@@ -701,8 +701,6 @@ int xen_update_persistent_clock(void)
+ return 0;
+ }
+
+-extern void (*late_time_init)(void);
+-
+ /* Dynamically-mapped IRQ. */
+ DEFINE_PER_CPU(int, timer_irq);
+
+--- a/arch/x86/kernel/traps_32-xen.c
++++ b/arch/x86/kernel/traps_32-xen.c
+@@ -9,26 +9,28 @@
+ * 'Traps.c' handles hardware traps and faults after we have saved some
+ * state in 'asm.s'.
+ */
+-#include <linux/sched.h>
++#include <linux/interrupt.h>
++#include <linux/kallsyms.h>
++#include <linux/spinlock.h>
++#include <linux/highmem.h>
++#include <linux/kprobes.h>
++#include <linux/uaccess.h>
++#include <linux/utsname.h>
++#include <linux/kdebug.h>
+ #include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/ptrace.h>
+ #include <linux/string.h>
++#include <linux/unwind.h>
++#include <linux/delay.h>
+ #include <linux/errno.h>
++#include <linux/kexec.h>
++#include <linux/sched.h>
+ #include <linux/timer.h>
+-#include <linux/mm.h>
+ #include <linux/init.h>
+-#include <linux/delay.h>
+-#include <linux/spinlock.h>
+-#include <linux/interrupt.h>
+-#include <linux/highmem.h>
+-#include <linux/kallsyms.h>
+-#include <linux/ptrace.h>
+-#include <linux/utsname.h>
+-#include <linux/kprobes.h>
+-#include <linux/kexec.h>
+-#include <linux/unwind.h>
+-#include <linux/uaccess.h>
+-#include <linux/nmi.h>
+ #include <linux/bug.h>
++#include <linux/nmi.h>
++#include <linux/mm.h>
+
+ #ifdef CONFIG_EISA
+ #include <linux/ioport.h>
+@@ -43,21 +45,18 @@
+ #include <linux/edac.h>
+ #endif
+
++#include <asm/arch_hooks.h>
++#include <asm/stacktrace.h>
+ #include <asm/processor.h>
+-#include <asm/system.h>
+-#include <asm/io.h>
+-#include <asm/atomic.h>
+ #include <asm/debugreg.h>
++#include <asm/atomic.h>
++#include <asm/system.h>
++#include <asm/unwind.h>
+ #include <asm/desc.h>
+ #include <asm/i387.h>
+ #include <asm/nmi.h>
+-#include <asm/unwind.h>
+ #include <asm/smp.h>
+-#include <asm/arch_hooks.h>
+-#include <linux/kdebug.h>
+-#include <asm/stacktrace.h>
+-
+-#include <linux/module.h>
++#include <asm/io.h>
+
+ #include "mach_traps.h"
+
+@@ -71,7 +70,7 @@ EXPORT_SYMBOL_GPL(used_vectors);
+ asmlinkage int system_call(void);
+
+ /* Do we ignore FPU interrupts ? */
+-char ignore_fpu_irq = 0;
++char ignore_fpu_irq;
+
+ #ifndef CONFIG_X86_NO_IDT
+ /*
+@@ -113,12 +112,13 @@ static unsigned int code_bytes = 64;
+ void printk_address(unsigned long address, int reliable)
+ {
+ #ifdef CONFIG_KALLSYMS
+- unsigned long offset = 0, symsize;
++ char namebuf[KSYM_NAME_LEN];
++ unsigned long offset = 0;
++ unsigned long symsize;
+ const char *symname;
+- char *modname;
+- char *delim = ":";
+- char namebuf[128];
+ char reliab[4] = "";
++ char *delim = ":";
++ char *modname;
+
+ symname = kallsyms_lookup(address, &symsize, &offset,
+ &modname, namebuf);
+@@ -146,13 +146,14 @@ static inline int valid_stack_ptr(struct
+
+ /* The form of the top of the frame on the stack */
+ struct stack_frame {
+- struct stack_frame *next_frame;
+- unsigned long return_address;
++ struct stack_frame *next_frame;
++ unsigned long return_address;
+ };
+
+-static inline unsigned long print_context_stack(struct thread_info *tinfo,
+- unsigned long *stack, unsigned long bp,
+- const struct stacktrace_ops *ops, void *data)
++static inline unsigned long
++print_context_stack(struct thread_info *tinfo,
++ unsigned long *stack, unsigned long bp,
++ const struct stacktrace_ops *ops, void *data)
+ {
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+@@ -174,7 +175,7 @@ static inline unsigned long print_contex
+ return bp;
+ }
+
+-#define MSG(msg) ops->warning(data, msg)
++#define MSG(msg) ops->warning(data, msg)
+
+ void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+@@ -185,6 +186,7 @@ void dump_trace(struct task_struct *task
+
+ if (!stack) {
+ unsigned long dummy;
++
+ stack = &dummy;
+ if (task != current)
+ stack = (unsigned long *)task->thread.sp;
+@@ -194,7 +196,7 @@ void dump_trace(struct task_struct *task
+ if (!bp) {
+ if (task == current) {
+ /* Grab bp right from our regs */
+- asm ("movl %%ebp, %0" : "=r" (bp) : );
++ asm("movl %%ebp, %0" : "=r" (bp) :);
+ } else {
+ /* bp is the last reg pushed by switch_to */
+ bp = *(unsigned long *) task->thread.sp;
+@@ -204,15 +206,18 @@ void dump_trace(struct task_struct *task
+
+ while (1) {
+ struct thread_info *context;
++
+ context = (struct thread_info *)
+ ((unsigned long)stack & (~(THREAD_SIZE - 1)));
+ bp = print_context_stack(context, stack, bp, ops, data);
+- /* Should be after the line below, but somewhere
+- in early boot context comes out corrupted and we
+- can't reference it -AK */
++ /*
++ * Should be after the line below, but somewhere
++ * in early boot context comes out corrupted and we
++ * can't reference it:
++ */
+ if (ops->stack(data, "IRQ") < 0)
+ break;
+- stack = (unsigned long*)context->previous_esp;
++ stack = (unsigned long *)context->previous_esp;
+ if (!stack)
+ break;
+ touch_nmi_watchdog();
+@@ -251,15 +256,15 @@ static void print_trace_address(void *da
+ }
+
+ static const struct stacktrace_ops print_trace_ops = {
+- .warning = print_trace_warning,
+- .warning_symbol = print_trace_warning_symbol,
+- .stack = print_trace_stack,
+- .address = print_trace_address,
++ .warning = print_trace_warning,
++ .warning_symbol = print_trace_warning_symbol,
++ .stack = print_trace_stack,
++ .address = print_trace_address,
+ };
+
+ static void
+ show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+- unsigned long *stack, unsigned long bp, char *log_lvl)
++ unsigned long *stack, unsigned long bp, char *log_lvl)
+ {
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+ printk("%s =======================\n", log_lvl);
+@@ -271,21 +276,22 @@ void show_trace(struct task_struct *task
+ show_trace_log_lvl(task, regs, stack, bp, "");
+ }
+
+-static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+- unsigned long *sp, unsigned long bp, char *log_lvl)
++static void
++show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
++ unsigned long *sp, unsigned long bp, char *log_lvl)
+ {
+ unsigned long *stack;
+ int i;
+
+ if (sp == NULL) {
+ if (task)
+- sp = (unsigned long*)task->thread.sp;
++ sp = (unsigned long *)task->thread.sp;
+ else
+ sp = (unsigned long *)&sp;
+ }
+
+ stack = sp;
+- for(i = 0; i < kstack_depth_to_print; i++) {
++ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (kstack_end(stack))
+ break;
+ if (i && ((i % 8) == 0))
+@@ -293,6 +299,7 @@ static void show_stack_log_lvl(struct ta
+ printk("%08lx ", *stack++);
+ }
+ printk("\n%sCall Trace:\n", log_lvl);
++
+ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+ }
+
+@@ -307,8 +314,8 @@ void show_stack(struct task_struct *task
+ */
+ void dump_stack(void)
+ {
+- unsigned long stack;
+ unsigned long bp = 0;
++ unsigned long stack;
+
+ #ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+@@ -320,6 +327,7 @@ void dump_stack(void)
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
++
+ show_trace(current, NULL, &stack, bp);
+ }
+
+@@ -331,6 +339,7 @@ void show_registers(struct pt_regs *regs
+
+ print_modules();
+ __show_registers(regs, 0);
++
+ printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
+ TASK_COMM_LEN, current->comm, task_pid_nr(current),
+ current_thread_info(), current, task_thread_info(current));
+@@ -339,10 +348,10 @@ void show_registers(struct pt_regs *regs
+ * time of the fault..
+ */
+ if (!user_mode_vm(regs)) {
+- u8 *ip;
+ unsigned int code_prologue = code_bytes * 43 / 64;
+ unsigned int code_len = code_bytes;
+ unsigned char c;
++ u8 *ip;
+
+ printk("\n" KERN_EMERG "Stack: ");
+ show_stack_log_lvl(NULL, regs, ®s->sp, 0, KERN_EMERG);
+@@ -369,7 +378,7 @@ void show_registers(struct pt_regs *regs
+ }
+ }
+ printk("\n");
+-}
++}
+
+ int is_valid_bugaddr(unsigned long ip)
+ {
+@@ -385,10 +394,10 @@ int is_valid_bugaddr(unsigned long ip)
+
+ static int die_counter;
+
+-int __kprobes __die(const char * str, struct pt_regs * regs, long err)
++int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+ {
+- unsigned long sp;
+ unsigned short ss;
++ unsigned long sp;
+
+ printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
+ #ifdef CONFIG_PREEMPT
+@@ -403,8 +412,8 @@ int __kprobes __die(const char * str, st
+ printk("\n");
+
+ if (notify_die(DIE_OOPS, str, regs, err,
+- current->thread.trap_no, SIGSEGV) !=
+- NOTIFY_STOP) {
++ current->thread.trap_no, SIGSEGV) != NOTIFY_STOP) {
++
+ show_registers(regs);
+ /* Executive summary in case the oops scrolled away */
+ sp = (unsigned long) (®s->sp);
+@@ -416,17 +425,18 @@ int __kprobes __die(const char * str, st
+ printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
+ print_symbol("%s", regs->ip);
+ printk(" SS:ESP %04x:%08lx\n", ss, sp);
++
+ return 0;
+- } else {
+- return 1;
+ }
++
++ return 1;
+ }
+
+ /*
+- * This is gone through when something in the kernel has done something bad and
+- * is about to be terminated.
++ * This is gone through when something in the kernel has done something bad
++ * and is about to be terminated:
+ */
+-void die(const char * str, struct pt_regs * regs, long err)
++void die(const char *str, struct pt_regs *regs, long err)
+ {
+ static struct {
+ raw_spinlock_t lock;
+@@ -448,8 +458,9 @@ void die(const char * str, struct pt_reg
+ die.lock_owner = smp_processor_id();
+ die.lock_owner_depth = 0;
+ bust_spinlocks(1);
+- } else
++ } else {
+ raw_local_irq_save(flags);
++ }
+
+ if (++die.lock_owner_depth < 3) {
+ report_bug(regs->ip, regs);
+@@ -482,19 +493,20 @@ void die(const char * str, struct pt_reg
+ do_exit(SIGSEGV);
+ }
+
+-static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err)
++static inline void
++die_if_kernel(const char *str, struct pt_regs *regs, long err)
+ {
+ if (!user_mode_vm(regs))
+ die(str, regs, err);
+ }
+
+-static void __kprobes do_trap(int trapnr, int signr, char *str, int vm86,
+- struct pt_regs * regs, long error_code,
+- siginfo_t *info)
++static void __kprobes
++do_trap(int trapnr, int signr, char *str, int vm86, struct pt_regs *regs,
++ long error_code, siginfo_t *info)
+ {
+ struct task_struct *tsk = current;
+
+- if (regs->flags & VM_MASK) {
++ if (regs->flags & X86_VM_MASK) {
+ if (vm86)
+ goto vm86_trap;
+ goto trap_signal;
+@@ -503,109 +515,112 @@ static void __kprobes do_trap(int trapnr
+ if (!user_mode(regs))
+ goto kernel_trap;
+
+- trap_signal: {
+- /*
+- * We want error_code and trap_no set for userspace faults and
+- * kernelspace faults which result in die(), but not
+- * kernelspace faults which are fixed up. die() gives the
+- * process no chance to handle the signal and notice the
+- * kernel fault information, so that won't result in polluting
+- * the information about previously queued, but not yet
+- * delivered, faults. See also do_general_protection below.
+- */
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = trapnr;
++trap_signal:
++ /*
++ * We want error_code and trap_no set for userspace faults and
++ * kernelspace faults which result in die(), but not
++ * kernelspace faults which are fixed up. die() gives the
++ * process no chance to handle the signal and notice the
++ * kernel fault information, so that won't result in polluting
++ * the information about previously queued, but not yet
++ * delivered, faults. See also do_general_protection below.
++ */
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
+
+- if (info)
+- force_sig_info(signr, info, tsk);
+- else
+- force_sig(signr, tsk);
+- return;
+- }
++ if (info)
++ force_sig_info(signr, info, tsk);
++ else
++ force_sig(signr, tsk);
++ return;
+
+- kernel_trap: {
+- if (!fixup_exception(regs)) {
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = trapnr;
+- die(str, regs, error_code);
+- }
+- return;
++kernel_trap:
++ if (!fixup_exception(regs)) {
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
++ die(str, regs, error_code);
+ }
++ return;
+
+- vm86_trap: {
+- int ret = handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, trapnr);
+- if (ret) goto trap_signal;
+- return;
+- }
++vm86_trap:
++ if (handle_vm86_trap((struct kernel_vm86_regs *) regs,
++ error_code, trapnr))
++ goto trap_signal;
++ return;
+ }
+
+-#define DO_ERROR(trapnr, signr, str, name) \
+-void do_##name(struct pt_regs * regs, long error_code) \
+-{ \
+- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
+- return; \
+- do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
+-}
+-
+-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
+-void do_##name(struct pt_regs * regs, long error_code) \
+-{ \
+- siginfo_t info; \
+- if (irq) \
+- local_irq_enable(); \
+- info.si_signo = signr; \
+- info.si_errno = 0; \
+- info.si_code = sicode; \
+- info.si_addr = (void __user *)siaddr; \
+- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
+- return; \
+- do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
+-}
+-
+-#define DO_VM86_ERROR(trapnr, signr, str, name) \
+-void do_##name(struct pt_regs * regs, long error_code) \
+-{ \
+- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
+- return; \
+- do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
+-}
+-
+-#define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
+-void do_##name(struct pt_regs * regs, long error_code) \
+-{ \
+- siginfo_t info; \
+- info.si_signo = signr; \
+- info.si_errno = 0; \
+- info.si_code = sicode; \
+- info.si_addr = (void __user *)siaddr; \
+- trace_hardirqs_fixup(); \
+- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
+- return; \
+- do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
++#define DO_ERROR(trapnr, signr, str, name) \
++void do_##name(struct pt_regs *regs, long error_code) \
++{ \
++ trace_hardirqs_fixup(); \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
++}
++
++#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
++void do_##name(struct pt_regs *regs, long error_code) \
++{ \
++ siginfo_t info; \
++ if (irq) \
++ local_irq_enable(); \
++ info.si_signo = signr; \
++ info.si_errno = 0; \
++ info.si_code = sicode; \
++ info.si_addr = (void __user *)siaddr; \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
++}
++
++#define DO_VM86_ERROR(trapnr, signr, str, name) \
++void do_##name(struct pt_regs *regs, long error_code) \
++{ \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
++}
++
++#define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
++void do_##name(struct pt_regs *regs, long error_code) \
++{ \
++ siginfo_t info; \
++ info.si_signo = signr; \
++ info.si_errno = 0; \
++ info.si_code = sicode; \
++ info.si_addr = (void __user *)siaddr; \
++ trace_hardirqs_fixup(); \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
++ do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
+ }
+
+-DO_VM86_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
++DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+ #ifndef CONFIG_KPROBES
+-DO_VM86_ERROR( 3, SIGTRAP, "int3", int3)
++DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
+ #endif
+-DO_VM86_ERROR( 4, SIGSEGV, "overflow", overflow)
+-DO_VM86_ERROR( 5, SIGSEGV, "bounds", bounds)
+-DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
+-DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
++DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
++DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds)
++DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
++DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
+ DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
+ DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+ DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
+ DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
+-DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0, 1)
++DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)
+
+ void __kprobes do_general_protection(struct pt_regs * regs,
+ long error_code)
+ {
+- if (regs->flags & VM_MASK)
++ struct thread_struct *thread;
++
++ thread = ¤t->thread;
++
++ if (regs->flags & X86_VM_MASK)
+ goto gp_in_vm86;
+
+ if (!user_mode(regs))
+@@ -613,6 +628,7 @@ void __kprobes do_general_protection(str
+
+ current->thread.error_code = error_code;
+ current->thread.trap_no = 13;
++
+ if (show_unhandled_signals && unhandled_signal(current, SIGSEGV) &&
+ printk_ratelimit()) {
+ printk(KERN_INFO
+@@ -642,22 +658,25 @@ gp_in_kernel:
+ }
+ }
+
+-static __kprobes void
+-mem_parity_error(unsigned char reason, struct pt_regs * regs)
++static notrace __kprobes void
++mem_parity_error(unsigned char reason, struct pt_regs *regs)
+ {
+- printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
+- "CPU %d.\n", reason, smp_processor_id());
+- printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
++ printk(KERN_EMERG
++ "Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
++ reason, smp_processor_id());
++
++ printk(KERN_EMERG
++ "You have some hardware problem, likely on the PCI bus.\n");
+
+ #if defined(CONFIG_EDAC)
+- if(edac_handler_set()) {
++ if (edac_handler_set()) {
+ edac_atomic_assert_error();
+ return;
+ }
+ #endif
+
+ if (panic_on_unrecovered_nmi)
+- panic("NMI: Not continuing");
++ panic("NMI: Not continuing");
+
+ printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+
+@@ -665,8 +684,8 @@ mem_parity_error(unsigned char reason, s
+ clear_mem_error(reason);
+ }
+
+-static __kprobes void
+-io_check_error(unsigned char reason, struct pt_regs * regs)
++static notrace __kprobes void
++io_check_error(unsigned char reason, struct pt_regs *regs)
+ {
+ printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
+ show_registers(regs);
+@@ -675,38 +694,43 @@ io_check_error(unsigned char reason, str
+ clear_io_check_error(reason);
+ }
+
+-static __kprobes void
+-unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
++static notrace __kprobes void
++unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
+ {
++ if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
++ return;
+ #ifdef CONFIG_MCA
+- /* Might actually be able to figure out what the guilty party
+- * is. */
+- if( MCA_bus ) {
++ /*
++ * Might actually be able to figure out what the guilty party
++ * is:
++ */
++ if (MCA_bus) {
+ mca_handle_nmi();
+ return;
+ }
+ #endif
+- printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
+- "CPU %d.\n", reason, smp_processor_id());
++ printk(KERN_EMERG
++ "Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
++ reason, smp_processor_id());
++
+ printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
+ if (panic_on_unrecovered_nmi)
+- panic("NMI: Not continuing");
++ panic("NMI: Not continuing");
+
+ printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+ }
+
+ static DEFINE_SPINLOCK(nmi_print_lock);
+
+-void __kprobes die_nmi(struct pt_regs *regs, const char *msg)
++void notrace __kprobes die_nmi(struct pt_regs *regs, const char *msg)
+ {
+- if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 2, SIGINT) ==
+- NOTIFY_STOP)
++ if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+ return;
+
+ spin_lock(&nmi_print_lock);
+ /*
+ * We are in trouble anyway, lets at least try
+- * to get a message out.
++ * to get a message out:
+ */
+ bust_spinlocks(1);
+ printk(KERN_EMERG "%s", msg);
+@@ -717,9 +741,10 @@ void __kprobes die_nmi(struct pt_regs *r
+ spin_unlock(&nmi_print_lock);
+ bust_spinlocks(0);
+
+- /* If we are in kernel we are probably nested up pretty bad
+- * and might aswell get out now while we still can.
+- */
++ /*
++ * If we are in kernel we are probably nested up pretty bad
++ * and might aswell get out now while we still can:
++ */
+ if (!user_mode_vm(regs)) {
+ current->thread.trap_no = 2;
+ crash_kexec(regs);
+@@ -728,14 +753,14 @@ void __kprobes die_nmi(struct pt_regs *r
+ do_exit(SIGSEGV);
+ }
+
+-static __kprobes void default_do_nmi(struct pt_regs * regs)
++static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
+ {
+ unsigned char reason = 0;
+
+- /* Only the BSP gets external NMIs from the system. */
++ /* Only the BSP gets external NMIs from the system: */
+ if (!smp_processor_id())
+ reason = get_nmi_reason();
+-
++
+ if (!(reason & 0xc0)) {
+ if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
+ == NOTIFY_STOP)
+@@ -748,8 +773,10 @@ static __kprobes void default_do_nmi(str
+ if (nmi_watchdog_tick(regs, reason))
+ return;
+ if (!do_nmi_callback(regs, smp_processor_id()))
+-#endif
+ unknown_nmi_error(reason, regs);
++#else
++ unknown_nmi_error(reason, regs);
++#endif
+
+ return;
+ }
+@@ -761,14 +788,14 @@ static __kprobes void default_do_nmi(str
+ io_check_error(reason, regs);
+ /*
+ * Reassert NMI in case it became active meanwhile
+- * as it's edge-triggered.
++ * as it's edge-triggered:
+ */
+ reassert_nmi();
+ }
+
+ static int ignore_nmis;
+
+-__kprobes void do_nmi(struct pt_regs * regs, long error_code)
++notrace __kprobes void do_nmi(struct pt_regs *regs, long error_code)
+ {
+ int cpu;
+
+@@ -804,9 +831,12 @@ void __kprobes do_int3(struct pt_regs *r
+ if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
+ == NOTIFY_STOP)
+ return;
+- /* This is an interrupt gate, because kprobes wants interrupts
+- disabled. Normal trap handlers don't. */
++ /*
++ * This is an interrupt gate, because kprobes wants interrupts
++ * disabled. Normal trap handlers don't.
++ */
+ restore_interrupts(regs);
++
+ do_trap(3, SIGTRAP, "int3", 1, regs, error_code, NULL);
+ }
+ #endif
+@@ -821,7 +851,7 @@ void __kprobes do_int3(struct pt_regs *r
+ * from user space. Such code must not hold kernel locks (since it
+ * can equally take a page fault), therefore it is safe to call
+ * force_sig_info even though that claims and releases locks.
+- *
++ *
+ * Code in ./signal.c ensures that the debug control register
+ * is restored before we deliver any signal, and therefore that
+ * user code runs with the correct debug control register even though
+@@ -833,10 +863,10 @@ void __kprobes do_int3(struct pt_regs *r
+ * find every occurrence of the TF bit that could be saved away even
+ * by user code)
+ */
+-void __kprobes do_debug(struct pt_regs * regs, long error_code)
++void __kprobes do_debug(struct pt_regs *regs, long error_code)
+ {
+- unsigned int condition;
+ struct task_struct *tsk = current;
++ unsigned int condition;
+
+ trace_hardirqs_fixup();
+
+@@ -861,7 +891,7 @@ void __kprobes do_debug(struct pt_regs *
+ goto clear_dr7;
+ }
+
+- if (regs->flags & VM_MASK)
++ if (regs->flags & X86_VM_MASK)
+ goto debug_vm86;
+
+ /* Save debug status register where ptrace can see it */
+@@ -884,7 +914,8 @@ void __kprobes do_debug(struct pt_regs *
+ /* Ok, finally something we can handle */
+ send_sigtrap(tsk, regs, error_code);
+
+- /* Disable additional traps. They'll be re-enabled when
++ /*
++ * Disable additional traps. They'll be re-enabled when
+ * the signal is delivered.
+ */
+ clear_dr7:
+@@ -897,7 +928,7 @@ debug_vm86:
+
+ clear_TF_reenable:
+ set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
+- regs->flags &= ~TF_MASK;
++ regs->flags &= ~X86_EFLAGS_TF;
+ return;
+ }
+
+@@ -908,9 +939,10 @@ clear_TF_reenable:
+ */
+ void math_error(void __user *ip)
+ {
+- struct task_struct * task;
++ struct task_struct *task;
++ unsigned short cwd;
++ unsigned short swd;
+ siginfo_t info;
+- unsigned short cwd, swd;
+
+ /*
+ * Save the info for the exception handler and clear the error.
+@@ -936,36 +968,36 @@ void math_error(void __user *ip)
+ cwd = get_fpu_cwd(task);
+ swd = get_fpu_swd(task);
+ switch (swd & ~cwd & 0x3f) {
+- case 0x000: /* No unmasked exception */
+- return;
+- default: /* Multiple exceptions */
+- break;
+- case 0x001: /* Invalid Op */
+- /*
+- * swd & 0x240 == 0x040: Stack Underflow
+- * swd & 0x240 == 0x240: Stack Overflow
+- * User must clear the SF bit (0x40) if set
+- */
+- info.si_code = FPE_FLTINV;
+- break;
+- case 0x002: /* Denormalize */
+- case 0x010: /* Underflow */
+- info.si_code = FPE_FLTUND;
+- break;
+- case 0x004: /* Zero Divide */
+- info.si_code = FPE_FLTDIV;
+- break;
+- case 0x008: /* Overflow */
+- info.si_code = FPE_FLTOVF;
+- break;
+- case 0x020: /* Precision */
+- info.si_code = FPE_FLTRES;
+- break;
++ case 0x000: /* No unmasked exception */
++ return;
++ default: /* Multiple exceptions */
++ break;
++ case 0x001: /* Invalid Op */
++ /*
++ * swd & 0x240 == 0x040: Stack Underflow
++ * swd & 0x240 == 0x240: Stack Overflow
++ * User must clear the SF bit (0x40) if set
++ */
++ info.si_code = FPE_FLTINV;
++ break;
++ case 0x002: /* Denormalize */
++ case 0x010: /* Underflow */
++ info.si_code = FPE_FLTUND;
++ break;
++ case 0x004: /* Zero Divide */
++ info.si_code = FPE_FLTDIV;
++ break;
++ case 0x008: /* Overflow */
++ info.si_code = FPE_FLTOVF;
++ break;
++ case 0x020: /* Precision */
++ info.si_code = FPE_FLTRES;
++ break;
+ }
+ force_sig_info(SIGFPE, &info, task);
+ }
+
+-void do_coprocessor_error(struct pt_regs * regs, long error_code)
++void do_coprocessor_error(struct pt_regs *regs, long error_code)
+ {
+ ignore_fpu_irq = 1;
+ math_error((void __user *)regs->ip);
+@@ -973,9 +1005,9 @@ void do_coprocessor_error(struct pt_regs
+
+ static void simd_math_error(void __user *ip)
+ {
+- struct task_struct * task;
+- siginfo_t info;
++ struct task_struct *task;
+ unsigned short mxcsr;
++ siginfo_t info;
+
+ /*
+ * Save the info for the exception handler and clear the error.
+@@ -996,84 +1028,82 @@ static void simd_math_error(void __user
+ */
+ mxcsr = get_fpu_mxcsr(task);
+ switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
+- case 0x000:
+- default:
+- break;
+- case 0x001: /* Invalid Op */
+- info.si_code = FPE_FLTINV;
+- break;
+- case 0x002: /* Denormalize */
+- case 0x010: /* Underflow */
+- info.si_code = FPE_FLTUND;
+- break;
+- case 0x004: /* Zero Divide */
+- info.si_code = FPE_FLTDIV;
+- break;
+- case 0x008: /* Overflow */
+- info.si_code = FPE_FLTOVF;
+- break;
+- case 0x020: /* Precision */
+- info.si_code = FPE_FLTRES;
+- break;
++ case 0x000:
++ default:
++ break;
++ case 0x001: /* Invalid Op */
++ info.si_code = FPE_FLTINV;
++ break;
++ case 0x002: /* Denormalize */
++ case 0x010: /* Underflow */
++ info.si_code = FPE_FLTUND;
++ break;
++ case 0x004: /* Zero Divide */
++ info.si_code = FPE_FLTDIV;
++ break;
++ case 0x008: /* Overflow */
++ info.si_code = FPE_FLTOVF;
++ break;
++ case 0x020: /* Precision */
++ info.si_code = FPE_FLTRES;
++ break;
+ }
+ force_sig_info(SIGFPE, &info, task);
+ }
+
+-void do_simd_coprocessor_error(struct pt_regs * regs,
+- long error_code)
++void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
+ {
+ if (cpu_has_xmm) {
+ /* Handle SIMD FPU exceptions on PIII+ processors. */
+ ignore_fpu_irq = 1;
+ simd_math_error((void __user *)regs->ip);
+- } else {
+- /*
+- * Handle strange cache flush from user space exception
+- * in all other cases. This is undocumented behaviour.
+- */
+- if (regs->flags & VM_MASK) {
+- handle_vm86_fault((struct kernel_vm86_regs *)regs,
+- error_code);
+- return;
+- }
+- current->thread.trap_no = 19;
+- current->thread.error_code = error_code;
+- die_if_kernel("cache flush denied", regs, error_code);
+- force_sig(SIGSEGV, current);
++ return;
++ }
++ /*
++ * Handle strange cache flush from user space exception
++ * in all other cases. This is undocumented behaviour.
++ */
++ if (regs->flags & X86_VM_MASK) {
++ handle_vm86_fault((struct kernel_vm86_regs *)regs, error_code);
++ return;
+ }
++ current->thread.trap_no = 19;
++ current->thread.error_code = error_code;
++ die_if_kernel("cache flush denied", regs, error_code);
++ force_sig(SIGSEGV, current);
+ }
+
+ #ifndef CONFIG_XEN
+-void do_spurious_interrupt_bug(struct pt_regs * regs,
+- long error_code)
++void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
+ {
+ #if 0
+ /* No need to warn about this any longer. */
+- printk("Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
++ printk(KERN_INFO "Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
+ #endif
+ }
+
+-unsigned long patch_espfix_desc(unsigned long uesp,
+- unsigned long kesp)
++unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
+ {
+ struct desc_struct *gdt = __get_cpu_var(gdt_page).gdt;
+ unsigned long base = (kesp - uesp) & -THREAD_SIZE;
+ unsigned long new_kesp = kesp - base;
+ unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT;
+ __u64 desc = *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS];
++
+ /* Set up base for espfix segment */
+- desc &= 0x00f0ff0000000000ULL;
+- desc |= ((((__u64)base) << 16) & 0x000000ffffff0000ULL) |
++ desc &= 0x00f0ff0000000000ULL;
++ desc |= ((((__u64)base) << 16) & 0x000000ffffff0000ULL) |
+ ((((__u64)base) << 32) & 0xff00000000000000ULL) |
+ ((((__u64)lim_pages) << 32) & 0x000f000000000000ULL) |
+ (lim_pages & 0xffff);
+ *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS] = desc;
++
+ return new_kesp;
+ }
+ #endif
+
+ /*
+- * 'math_state_restore()' saves the current math information in the
++ * 'math_state_restore()' saves the current math information in the
+ * old math state array, and gets the new ones from the current task
+ *
+ * Careful.. There are problems with IBM-designed IRQ13 behaviour.
+@@ -1087,9 +1117,22 @@ asmlinkage void math_state_restore(void)
+ struct thread_info *thread = current_thread_info();
+ struct task_struct *tsk = thread->task;
+
++ if (!tsk_used_math(tsk)) {
++ local_irq_enable();
++ /*
++ * does a slab alloc which can sleep
++ */
++ if (init_fpu(tsk)) {
++ /*
++ * ran out of memory!
++ */
++ do_group_exit(SIGKILL);
++ return;
++ }
++ local_irq_disable();
++ }
++
+ /* NB. 'clts' is done for us by Xen during virtual trap. */
+- if (!tsk_used_math(tsk))
+- init_fpu(tsk);
+ restore_fpu(tsk);
+ thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */
+ tsk->fpu_counter++;
+@@ -1100,15 +1143,15 @@ EXPORT_SYMBOL_GPL(math_state_restore);
+
+ asmlinkage void math_emulate(long arg)
+ {
+- printk(KERN_EMERG "math-emulation not enabled and no coprocessor found.\n");
+- printk(KERN_EMERG "killing %s.\n",current->comm);
+- force_sig(SIGFPE,current);
++ printk(KERN_EMERG
++ "math-emulation not enabled and no coprocessor found.\n");
++ printk(KERN_EMERG "killing %s.\n", current->comm);
++ force_sig(SIGFPE, current);
+ schedule();
+ }
+
+ #endif /* CONFIG_MATH_EMULATION */
+
+-
+ /*
+ * NB. All these are "trap gates" (i.e. events_mask isn't set) except
+ * for those that specify <dpl>|4 in the second field.
+@@ -1146,25 +1189,21 @@ void __init trap_init(void)
+ if (ret)
+ printk("HYPERVISOR_set_trap_table failed: error %d\n", ret);
+
+- /*
+- * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned.
+- * Generate a build-time error if the alignment is wrong.
+- */
+- BUILD_BUG_ON(offsetof(struct task_struct, thread.i387.fxsave) & 15);
+ if (cpu_has_fxsr) {
+ printk(KERN_INFO "Enabling fast FPU save and restore... ");
+ set_in_cr4(X86_CR4_OSFXSR);
+ printk("done.\n");
+ }
+ if (cpu_has_xmm) {
+- printk(KERN_INFO "Enabling unmasked SIMD FPU exception "
+- "support... ");
++ printk(KERN_INFO
++ "Enabling unmasked SIMD FPU exception support... ");
+ set_in_cr4(X86_CR4_OSXMMEXCPT);
+ printk("done.\n");
+ }
+
++ init_thread_xstate();
+ /*
+- * Should be a barrier for any external CPU state.
++ * Should be a barrier for any external CPU state:
+ */
+ cpu_init();
+ }
+@@ -1183,6 +1222,7 @@ void __cpuinit smp_trap_init(trap_info_t
+ static int __init kstack_setup(char *s)
+ {
+ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
++
+ return 1;
+ }
+ __setup("kstack=", kstack_setup);
+--- a/arch/x86/kernel/traps_64-xen.c
++++ b/arch/x86/kernel/traps_64-xen.c
+@@ -33,6 +33,8 @@
+ #include <linux/kdebug.h>
+ #include <linux/utsname.h>
+
++#include <mach_traps.h>
++
+ #if defined(CONFIG_EDAC)
+ #include <linux/edac.h>
+ #endif
+@@ -601,10 +603,16 @@ void die(const char * str, struct pt_reg
+ }
+
+ #if defined(CONFIG_X86_LOCAL_APIC) || defined(CONFIG_SYSCTL)
+-void __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
++notrace __kprobes void
++die_nmi(char *str, struct pt_regs *regs, int do_panic)
+ {
+- unsigned long flags = oops_begin();
++ unsigned long flags;
++
++ if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) ==
++ NOTIFY_STOP)
++ return;
+
++ flags = oops_begin();
+ /*
+ * We are in trouble anyway, lets at least try
+ * to get a message out.
+@@ -769,7 +777,7 @@ asmlinkage void __kprobes do_general_pro
+ die("general protection fault", regs, error_code);
+ }
+
+-static __kprobes void
++static notrace __kprobes void
+ mem_parity_error(unsigned char reason, struct pt_regs * regs)
+ {
+ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
+@@ -792,7 +800,7 @@ mem_parity_error(unsigned char reason, s
+ clear_mem_error(reason);
+ }
+
+-static __kprobes void
++static notrace __kprobes void
+ io_check_error(unsigned char reason, struct pt_regs * regs)
+ {
+ printk("NMI: IOCK error (debug interrupt?)\n");
+@@ -802,9 +810,11 @@ io_check_error(unsigned char reason, str
+ clear_io_check_error(reason);
+ }
+
+-static __kprobes void
++static notrace __kprobes void
+ unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
+ {
++ if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
++ return;
+ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
+ reason);
+ printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
+@@ -817,7 +827,7 @@ unknown_nmi_error(unsigned char reason,
+
+ /* Runs on IST stack. This code must keep interrupts off all the time.
+ Nested NMIs are prevented by the CPU. */
+-asmlinkage __kprobes void default_do_nmi(struct pt_regs *regs)
++asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
+ {
+ unsigned char reason = 0;
+ int cpu;
+@@ -1117,11 +1127,25 @@ asmlinkage void __attribute__((weak)) mc
+ asmlinkage void math_state_restore(void)
+ {
+ struct task_struct *me = current;
++
++ if (!used_math()) {
++ local_irq_enable();
++ /*
++ * does a slab alloc which can sleep
++ */
++ if (init_fpu(me)) {
++ /*
++ * ran out of memory!
++ */
++ do_group_exit(SIGKILL);
++ return;
++ }
++ local_irq_disable();
++ }
++
+ /* clts(); */ /* 'clts' is done for us by Xen during virtual trap. */
+
+- if (!used_math())
+- init_fpu(me);
+- restore_fpu_checking(&me->thread.i387.fxsave);
++ restore_fpu_checking(&me->thread.xstate->fxsave);
+ task_thread_info(me)->status |= TS_USEDFPU;
+ me->fpu_counter++;
+ }
+@@ -1168,6 +1192,10 @@ void __init trap_init(void)
+ printk("HYPERVISOR_set_trap_table failed: error %d\n", ret);
+
+ /*
++ * initialize the per thread extended state:
++ */
++ init_thread_xstate();
++ /*
+ * Should be a barrier for any external CPU state.
+ */
+ cpu_init();
+--- a/arch/x86/kernel/vsyscall_64-xen.c
++++ b/arch/x86/kernel/vsyscall_64-xen.c
+@@ -216,7 +216,7 @@ vgetcpu(unsigned *cpu, unsigned *node, s
+ return 0;
+ }
+
+-long __vsyscall(3) venosys_1(void)
++static long __vsyscall(3) venosys_1(void)
+ {
+ return -ENOSYS;
+ }
+--- a/arch/x86/mm/fault-xen.c
++++ b/arch/x86/mm/fault-xen.c
+@@ -510,6 +510,11 @@ static int vmalloc_fault(unsigned long a
+ unsigned long pgd_paddr;
+ pmd_t *pmd_k;
+ pte_t *pte_k;
++
++ /* Make sure we are in vmalloc area */
++ if (!(address >= VMALLOC_START && address < VMALLOC_END))
++ return -1;
++
+ /*
+ * Synchronize this task's top level page-table
+ * with the 'reference' page table.
+@@ -671,7 +676,7 @@ void __kprobes do_page_fault(struct pt_r
+ #ifdef CONFIG_X86_32
+ /* It's safe to allow irq's after cr2 has been saved and the vmalloc
+ fault has been handled. */
+- if (regs->flags & (X86_EFLAGS_IF|VM_MASK))
++ if (regs->flags & (X86_EFLAGS_IF | X86_VM_MASK))
+ local_irq_enable();
+
+ /*
+@@ -1018,9 +1023,5 @@ void vmalloc_sync_all(void)
+ if (address == start)
+ start = address + PGDIR_SIZE;
+ }
+- /* Check that there is no need to do the same for the modules area. */
+- BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL));
+- BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
+- (__START_KERNEL & PGDIR_MASK)));
+ #endif
+ }
+--- a/arch/x86/mm/highmem_32-xen.c
++++ b/arch/x86/mm/highmem_32-xen.c
+@@ -200,6 +200,5 @@ EXPORT_SYMBOL(kmap);
+ EXPORT_SYMBOL(kunmap);
+ EXPORT_SYMBOL(kmap_atomic);
+ EXPORT_SYMBOL(kunmap_atomic);
+-EXPORT_SYMBOL(kmap_atomic_to_page);
+ EXPORT_SYMBOL(clear_highpage);
+ EXPORT_SYMBOL(copy_highpage);
+--- a/arch/x86/mm/init_32-xen.c
++++ b/arch/x86/mm/init_32-xen.c
+@@ -1,5 +1,4 @@
+ /*
+- * linux/arch/i386/mm/init.c
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ *
+@@ -22,6 +21,7 @@
+ #include <linux/init.h>
+ #include <linux/highmem.h>
+ #include <linux/pagemap.h>
++#include <linux/pci.h>
+ #include <linux/pfn.h>
+ #include <linux/poison.h>
+ #include <linux/bootmem.h>
+@@ -54,6 +54,8 @@
+
+ unsigned int __VMALLOC_RESERVE = 128 << 20;
+
++unsigned long max_pfn_mapped;
++
+ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+ unsigned long highstart_pfn, highend_pfn;
+
+@@ -73,7 +75,7 @@ static pmd_t * __init one_md_table_init(
+ if (!(__pgd_val(*pgd) & _PAGE_PRESENT)) {
+ pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+
+- paravirt_alloc_pd(&init_mm, __pa(pmd_table) >> PAGE_SHIFT);
++ paravirt_alloc_pmd(&init_mm, __pa(pmd_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(pmd_table, XENFEAT_writable_page_tables);
+ set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
+ pud = pud_offset(pgd, 0);
+@@ -107,7 +109,7 @@ static pte_t * __init one_page_table_ini
+ (pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+ }
+
+- paravirt_alloc_pt(&init_mm, __pa(page_table) >> PAGE_SHIFT);
++ paravirt_alloc_pte(&init_mm, __pa(page_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(page_table,
+ XENFEAT_writable_page_tables);
+ set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
+@@ -209,8 +211,13 @@ static void __init kernel_physical_mappi
+ /*
+ * Map with big pages if possible, otherwise
+ * create normal page tables:
++ *
++ * Don't use a large page for the first 2/4MB of memory
++ * because there are often fixed size MTRRs in there
++ * and overlapping MTRRs into large pages can cause
++ * slowdowns.
+ */
+- if (cpu_has_pse) {
++ if (cpu_has_pse && !(pgd_idx == 0 && pmd_idx == 0)) {
+ unsigned int addr2;
+ pgprot_t prot = PAGE_KERNEL_LARGE;
+
+@@ -224,6 +231,7 @@ static void __init kernel_physical_mappi
+ set_pmd(pmd, pfn_pmd(pfn, prot));
+
+ pfn += PTRS_PER_PTE;
++ max_pfn_mapped = pfn;
+ continue;
+ }
+ pte = one_page_table_init(pmd);
+@@ -241,6 +249,7 @@ static void __init kernel_physical_mappi
+
+ set_pte(pte, pfn_pte(pfn, prot));
+ }
++ max_pfn_mapped = pfn;
+ pte_ofs = 0;
+ }
+ pmd_idx = 0;
+@@ -262,6 +271,25 @@ static inline int page_kills_ppro(unsign
+
+ #endif
+
++/*
++ * devmem_is_allowed() checks to see if /dev/mem access to a certain address
++ * is valid. The argument is a physical page number.
++ *
++ *
++ * On x86, access has to be given to the first megabyte of ram because that area
++ * contains bios code and data regions used by X and dosemu and similar apps.
++ * Access has to be given to non-kernel-ram areas as well, these contain the PCI
++ * mmio resources as well as potential bios/acpi data regions.
++ */
++int devmem_is_allowed(unsigned long pagenr)
++{
++ if (pagenr <= 256)
++ return 1;
++ if (mfn_to_local_pfn(pagenr) >= max_pfn)
++ return 1;
++ return 0;
++}
++
+ #ifdef CONFIG_HIGHMEM
+ pte_t *kmap_pte;
+ pgprot_t kmap_prot;
+@@ -303,48 +331,18 @@ static void __init permanent_kmaps_init(
+ pkmap_page_table = pte;
+ }
+
+-static void __meminit free_new_highpage(struct page *page, int pfn)
+-{
+- init_page_count(page);
+- if (pfn < xen_start_info->nr_pages)
+- __free_page(page);
+- totalhigh_pages++;
+-}
+-
+ void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
+ {
+ if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn))) {
+ ClearPageReserved(page);
+- free_new_highpage(page, pfn);
++ init_page_count(page);
++ if (pfn < xen_start_info->nr_pages)
++ __free_page(page);
++ totalhigh_pages++;
+ } else
+ SetPageReserved(page);
+ }
+
+-static int __meminit
+-add_one_highpage_hotplug(struct page *page, unsigned long pfn)
+-{
+- free_new_highpage(page, pfn);
+- totalram_pages++;
+-#ifdef CONFIG_FLATMEM
+- max_mapnr = max(pfn, max_mapnr);
+-#endif
+- num_physpages++;
+-
+- return 0;
+-}
+-
+-/*
+- * Not currently handling the NUMA case.
+- * Assuming single node and all memory that
+- * has been added dynamically that would be
+- * onlined here is in HIGHMEM.
+- */
+-void __meminit online_page(struct page *page)
+-{
+- ClearPageReserved(page);
+- add_one_highpage_hotplug(page, page_to_pfn(page));
+-}
+-
+ #ifndef CONFIG_NUMA
+ static void __init set_highmem_pages_init(int bad_ppro)
+ {
+@@ -459,15 +457,13 @@ void zap_low_mappings(void)
+ {
+ int i;
+
+- save_pg_dir();
+-
+ /*
+ * Zap initial low-memory mappings.
+ *
+ * Note that "pgd_clear()" doesn't do it for
+ * us, because pgd_clear() is a no-op on i386.
+ */
+- for (i = 0; i < USER_PTRS_PER_PGD; i++) {
++ for (i = 0; i < KERNEL_PGD_BOUNDARY; i++) {
+ #if defined(CONFIG_X86_PAE) && !defined(CONFIG_XEN)
+ set_pgd(swapper_pg_dir+i, __pgd(1 + __pa(empty_zero_page)));
+ #else
+@@ -572,9 +568,9 @@ void __init paging_init(void)
+
+ /*
+ * Test if the WP bit works in supervisor mode. It isn't supported on 386's
+- * and also on some strange 486's (NexGen etc.). All 586+'s are OK. This
+- * used to involve black magic jumps to work around some nasty CPU bugs,
+- * but fortunately the switch to using exceptions got rid of all that.
++ * and also on some strange 486's. All 586+'s are OK. This used to involve
++ * black magic jumps to work around some nasty CPU bugs, but fortunately the
++ * switch to using exceptions got rid of all that.
+ */
+ static void __init test_wp_bit(void)
+ {
+@@ -605,9 +601,7 @@ void __init mem_init(void)
+ int tmp, bad_ppro;
+ unsigned long pfn;
+
+-#if defined(CONFIG_SWIOTLB)
+- swiotlb_init();
+-#endif
++ pci_iommu_alloc();
+
+ #ifdef CONFIG_FLATMEM
+ BUG_ON(!mem_map);
+@@ -710,16 +704,8 @@ void __init mem_init(void)
+ test_wp_bit();
+
+ cpa_init();
+-
+- /*
+- * Subtle. SMP is doing it's boot stuff late (because it has to
+- * fork idle threads) - but it also needs low mappings for the
+- * protected-mode entry to work. We zap these entries only after
+- * the WP-bit has been tested.
+- */
+-#ifndef CONFIG_SMP
++ save_pg_dir();
+ zap_low_mappings();
+-#endif
+
+ SetPagePinned(virt_to_page(init_mm.pgd));
+ }
+@@ -769,25 +755,17 @@ void mark_rodata_ro(void)
+ unsigned long start = PFN_ALIGN(_text);
+ unsigned long size = PFN_ALIGN(_etext) - start;
+
+-#ifndef CONFIG_KPROBES
+-#ifdef CONFIG_HOTPLUG_CPU
+- /* It must still be possible to apply SMP alternatives. */
+- if (num_possible_cpus() <= 1)
+-#endif
+- {
+- set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
+- printk(KERN_INFO "Write protecting the kernel text: %luk\n",
+- size >> 10);
++ set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
++ printk(KERN_INFO "Write protecting the kernel text: %luk\n",
++ size >> 10);
+
+ #ifdef CONFIG_CPA_DEBUG
+- printk(KERN_INFO "Testing CPA: Reverting %lx-%lx\n",
+- start, start+size);
+- set_pages_rw(virt_to_page(start), size>>PAGE_SHIFT);
++ printk(KERN_INFO "Testing CPA: Reverting %lx-%lx\n",
++ start, start+size);
++ set_pages_rw(virt_to_page(start), size>>PAGE_SHIFT);
+
+- printk(KERN_INFO "Testing CPA: write protecting again\n");
+- set_pages_ro(virt_to_page(start), size>>PAGE_SHIFT);
+-#endif
+- }
++ printk(KERN_INFO "Testing CPA: write protecting again\n");
++ set_pages_ro(virt_to_page(start), size>>PAGE_SHIFT);
+ #endif
+ start += size;
+ size = (unsigned long)__end_rodata - start;
+--- a/arch/x86/mm/init_64-xen.c
++++ b/arch/x86/mm/init_64-xen.c
+@@ -52,9 +52,6 @@
+
+ #include <xen/features.h>
+
+-const struct dma_mapping_ops *dma_ops;
+-EXPORT_SYMBOL(dma_ops);
+-
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ unsigned int __kernel_page_user;
+ EXPORT_SYMBOL(__kernel_page_user);
+@@ -68,6 +65,28 @@ extern unsigned long start_pfn;
+ extern pmd_t level2_fixmap_pgt[PTRS_PER_PMD];
+ extern pte_t level1_fixmap_pgt[PTRS_PER_PTE];
+
++int direct_gbpages __meminitdata
++#ifdef CONFIG_DIRECT_GBPAGES
++ = 1
++#endif
++;
++
++#ifndef CONFIG_XEN
++static int __init parse_direct_gbpages_off(char *arg)
++{
++ direct_gbpages = 0;
++ return 0;
++}
++early_param("nogbpages", parse_direct_gbpages_off);
++
++static int __init parse_direct_gbpages_on(char *arg)
++{
++ direct_gbpages = 1;
++ return 0;
++}
++early_param("gbpages", parse_direct_gbpages_on);
++#endif
++
+ /*
+ * Use this until direct mapping is established, i.e. before __va() is
+ * available in init_memory_mapping().
+@@ -135,9 +154,6 @@ void show_mem(void)
+
+ printk(KERN_INFO "Mem-info:\n");
+ show_free_areas();
+- printk(KERN_INFO "Free swap: %6ldkB\n",
+- nr_swap_pages << (PAGE_SHIFT-10));
+-
+ for_each_online_pgdat(pgdat) {
+ for (i = 0; i < pgdat->node_spanned_pages; ++i) {
+ /*
+@@ -328,7 +344,7 @@ void __init cleanup_highmap(void)
+ pmd_t *last_pmd = pmd + PTRS_PER_PMD;
+
+ for (; pmd < last_pmd; pmd++, vaddr += PMD_SIZE) {
+- if (!pmd_present(*pmd))
++ if (pmd_none(*pmd))
+ continue;
+ if (vaddr < (unsigned long) _text || vaddr > end)
+ set_pmd(pmd, __pmd(0));
+@@ -337,8 +353,7 @@ void __init cleanup_highmap(void)
+ #endif
+
+ /* NOTE: this is meant to be run only at boot */
+-void __init
+-__set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
++void __init __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
+ {
+ unsigned long address = __fix_to_virt(idx);
+
+@@ -463,7 +478,7 @@ __meminit void early_iounmap(void *addr,
+ }
+ #endif
+
+-static void __meminit
++static unsigned long __meminit
+ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end)
+ {
+ int i = pmd_index(address);
+@@ -503,21 +518,26 @@ phys_pmd_init(pmd_t *pmd_page, unsigned
+ set_pmd(pmd, __pmd(pte_phys | _KERNPG_TABLE));
+ }
+ }
++ return address;
+ }
+
+-static void __meminit
++static unsigned long __meminit
+ phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end)
+ {
+ pmd_t *pmd = pmd_offset(pud, 0);
++ unsigned long last_map_addr;
++
+ spin_lock(&init_mm.page_table_lock);
+- phys_pmd_init(pmd, address, end);
++ last_map_addr = phys_pmd_init(pmd, address, end);
+ spin_unlock(&init_mm.page_table_lock);
+ __flush_tlb_all();
++ return last_map_addr;
+ }
+
+-static void __meminit
++static unsigned long __meminit
+ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end)
+ {
++ unsigned long last_map_addr = end;
+ int i = pud_index(addr);
+
+ for (; i < PTRS_PER_PUD; i++, addr = (addr & PUD_MASK) + PUD_SIZE) {
+@@ -529,7 +549,15 @@ phys_pud_init(pud_t *pud_page, unsigned
+ break;
+
+ if (__pud_val(*pud)) {
+- phys_pmd_update(pud, addr, end);
++ if (!pud_large(*pud))
++ last_map_addr = phys_pmd_update(pud, addr, end);
++ continue;
++ }
++
++ if (direct_gbpages) {
++ set_pte((pte_t *)pud,
++ pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
++ last_map_addr = (addr & PUD_MASK) + PUD_SIZE;
+ continue;
+ }
+
+@@ -537,12 +565,14 @@ phys_pud_init(pud_t *pud_page, unsigned
+
+ spin_lock(&init_mm.page_table_lock);
+ *pud = __pud(pmd_phys | _KERNPG_TABLE);
+- phys_pmd_init(pmd, addr, end);
++ last_map_addr = phys_pmd_init(pmd, addr, end);
+ spin_unlock(&init_mm.page_table_lock);
+
+ early_make_page_readonly(pmd, XENFEAT_writable_page_tables);
+ }
+ __flush_tlb_all();
++
++ return last_map_addr >> PAGE_SHIFT;
+ }
+
+ void __init xen_init_pt(void)
+@@ -763,16 +793,136 @@ static void __init xen_finish_init_mappi
+ table_end = start_pfn;
+ }
+
++static void __init init_gbpages(void)
++{
++ if (direct_gbpages && cpu_has_gbpages)
++ printk(KERN_INFO "Using GB pages for direct mapping\n");
++ else
++ direct_gbpages = 0;
++}
++
++#ifdef CONFIG_MEMTEST_BOOTPARAM
++
++static void __init memtest(unsigned long start_phys, unsigned long size,
++ unsigned pattern)
++{
++ unsigned long i;
++ unsigned long *start;
++ unsigned long start_bad;
++ unsigned long last_bad;
++ unsigned long val;
++ unsigned long start_phys_aligned;
++ unsigned long count;
++ unsigned long incr;
++
++ switch (pattern) {
++ case 0:
++ val = 0UL;
++ break;
++ case 1:
++ val = -1UL;
++ break;
++ case 2:
++ val = 0x5555555555555555UL;
++ break;
++ case 3:
++ val = 0xaaaaaaaaaaaaaaaaUL;
++ break;
++ default:
++ return;
++ }
++
++ incr = sizeof(unsigned long);
++ start_phys_aligned = ALIGN(start_phys, incr);
++ count = (size - (start_phys_aligned - start_phys))/incr;
++ start = __va(start_phys_aligned);
++ start_bad = 0;
++ last_bad = 0;
++
++ for (i = 0; i < count; i++)
++ start[i] = val;
++ for (i = 0; i < count; i++, start++, start_phys_aligned += incr) {
++ if (*start != val) {
++ if (start_phys_aligned == last_bad + incr) {
++ last_bad += incr;
++ } else {
++ if (start_bad) {
++ printk(KERN_CONT "\n %016lx bad mem addr %016lx - %016lx reserved",
++ val, start_bad, last_bad + incr);
++ reserve_early(start_bad, last_bad - start_bad, "BAD RAM");
++ }
++ start_bad = last_bad = start_phys_aligned;
++ }
++ }
++ }
++ if (start_bad) {
++ printk(KERN_CONT "\n %016lx bad mem addr %016lx - %016lx reserved",
++ val, start_bad, last_bad + incr);
++ reserve_early(start_bad, last_bad - start_bad, "BAD RAM");
++ }
++
++}
++
++static int memtest_pattern __initdata = CONFIG_MEMTEST_BOOTPARAM_VALUE;
++
++static int __init parse_memtest(char *arg)
++{
++ if (arg)
++ memtest_pattern = simple_strtoul(arg, NULL, 0);
++ return 0;
++}
++
++early_param("memtest", parse_memtest);
++
++static void __init early_memtest(unsigned long start, unsigned long end)
++{
++ u64 t_start, t_size;
++ unsigned pattern;
++
++ if (!memtest_pattern)
++ return;
++
++ printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern);
++ for (pattern = 0; pattern < memtest_pattern; pattern++) {
++ t_start = start;
++ t_size = 0;
++ while (t_start < end) {
++ t_start = find_e820_area_size(t_start, &t_size, 1);
++
++ /* done ? */
++ if (t_start >= end)
++ break;
++ if (t_start + t_size > end)
++ t_size = end - t_start;
++
++ printk(KERN_CONT "\n %016llx - %016llx pattern %d",
++ (unsigned long long)t_start,
++ (unsigned long long)t_start + t_size, pattern);
++
++ memtest(t_start, t_size, pattern);
++
++ t_start += t_size;
++ }
++ }
++ printk(KERN_CONT "\n");
++}
++#else
++static void __init early_memtest(unsigned long start, unsigned long end)
++{
++}
++#endif
++
+ /*
+ * Setup the direct mapping of the physical memory at PAGE_OFFSET.
+ * This runs before bootmem is initialized and gets pages directly from
+ * the physical memory. To access them they are temporarily mapped.
+ */
+-void __init_refok init_memory_mapping(unsigned long start, unsigned long end)
++unsigned long __init_refok init_memory_mapping(unsigned long start, unsigned long end)
+ {
+- unsigned long next;
++ unsigned long next, last_map_addr = end;
++ unsigned long start_phys = start, end_phys = end;
+
+- pr_debug("init_memory_mapping\n");
++ printk(KERN_INFO "init_memory_mapping\n");
+
+ /*
+ * Find space for the kernel direct mapping tables.
+@@ -781,8 +931,10 @@ void __init_refok init_memory_mapping(un
+ * memory mapped. Unfortunately this is done currently before the
+ * nodes are discovered.
+ */
+- if (!after_bootmem)
++ if (!after_bootmem) {
++ init_gbpages();
+ find_early_table_space(end);
++ }
+
+ start = (unsigned long)__va(start);
+ end = (unsigned long)__va(end);
+@@ -799,7 +951,7 @@ void __init_refok init_memory_mapping(un
+ next = start + PGDIR_SIZE;
+ if (next > end)
+ next = end;
+- phys_pud_init(pud, __pa(start), __pa(next));
++ last_map_addr = phys_pud_init(pud, __pa(start), __pa(next));
+ if (!after_bootmem) {
+ early_make_page_readonly(pud, XENFEAT_writable_page_tables);
+ set_pgd(pgd_offset_k(start), mk_kernel_pgd(pud_phys));
+@@ -816,6 +968,11 @@ void __init_refok init_memory_mapping(un
+ if (!after_bootmem)
+ reserve_early(table_start << PAGE_SHIFT,
+ table_end << PAGE_SHIFT, "PGTABLE");
++
++ if (!after_bootmem)
++ early_memtest(start_phys, end_phys);
++
++ return last_map_addr;
+ }
+
+ #ifndef CONFIG_NUMA
+@@ -839,15 +996,6 @@ void __init paging_init(void)
+ /*
+ * Memory hotplug specific functions
+ */
+-void online_page(struct page *page)
+-{
+- ClearPageReserved(page);
+- init_page_count(page);
+- __free_page(page);
+- totalram_pages++;
+- num_physpages++;
+-}
+-
+ #ifdef CONFIG_MEMORY_HOTPLUG
+ /*
+ * Memory is added always to NORMAL zone. This means you will never get
+@@ -857,11 +1005,13 @@ int arch_add_memory(int nid, u64 start,
+ {
+ struct pglist_data *pgdat = NODE_DATA(nid);
+ struct zone *zone = pgdat->node_zones + ZONE_NORMAL;
+- unsigned long start_pfn = start >> PAGE_SHIFT;
++ unsigned long last_mapped_pfn, start_pfn = start >> PAGE_SHIFT;
+ unsigned long nr_pages = size >> PAGE_SHIFT;
+ int ret;
+
+- init_memory_mapping(start, start + size-1);
++ last_mapped_pfn = init_memory_mapping(start, start + size-1);
++ if (last_mapped_pfn > max_pfn_mapped)
++ max_pfn_mapped = last_mapped_pfn;
+
+ ret = __add_pages(zone, start_pfn, nr_pages);
+ WARN_ON(1);
+@@ -880,6 +1030,26 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to
+
+ #endif /* CONFIG_MEMORY_HOTPLUG */
+
++/*
++ * devmem_is_allowed() checks to see if /dev/mem access to a certain address
++ * is valid. The argument is a physical page number.
++ *
++ *
++ * On x86, access has to be given to the first megabyte of ram because that area
++ * contains bios code and data regions used by X and dosemu and similar apps.
++ * Access has to be given to non-kernel-ram areas as well, these contain the PCI
++ * mmio resources as well as potential bios/acpi data regions.
++ */
++int devmem_is_allowed(unsigned long pagenr)
++{
++ if (pagenr <= 256)
++ return 1;
++ if (mfn_to_local_pfn(pagenr) >= max_pfn)
++ return 1;
++ return 0;
++}
++
++
+ static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel,
+ kcore_modules, kcore_vsyscall;
+
+@@ -988,24 +1158,7 @@ EXPORT_SYMBOL_GPL(rodata_test_data);
+
+ void mark_rodata_ro(void)
+ {
+- unsigned long start = (unsigned long)_stext, end;
+-
+-#ifdef CONFIG_HOTPLUG_CPU
+- /* It must still be possible to apply SMP alternatives. */
+- if (num_possible_cpus() > 1)
+- start = (unsigned long)_etext;
+-#endif
+-
+-#ifdef CONFIG_KPROBES
+- start = (unsigned long)__start_rodata;
+-#endif
+-
+- end = (unsigned long)__end_rodata;
+- start = (start + PAGE_SIZE - 1) & PAGE_MASK;
+- end &= PAGE_MASK;
+- if (end <= start)
+- return;
+-
++ unsigned long start = PFN_ALIGN(_stext), end = PFN_ALIGN(__end_rodata);
+
+ printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
+ (end - start) >> 10);
+@@ -1028,6 +1181,7 @@ void mark_rodata_ro(void)
+ set_memory_ro(start, (end-start) >> PAGE_SHIFT);
+ #endif
+ }
++
+ #endif
+
+ #ifdef CONFIG_BLK_DEV_INITRD
+@@ -1040,7 +1194,7 @@ void free_initrd_mem(unsigned long start
+ void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
+ {
+ #ifdef CONFIG_NUMA
+- int nid = phys_to_nid(phys);
++ int nid, next_nid;
+ #endif
+ unsigned long pfn = phys >> PAGE_SHIFT;
+
+@@ -1049,7 +1203,7 @@ void __init reserve_bootmem_generic(unsi
+ * This can happen with kdump kernels when accessing
+ * firmware tables:
+ */
+- if (pfn < end_pfn_map)
++ if (pfn < max_pfn_mapped)
+ return;
+
+ printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %u\n",
+@@ -1059,10 +1213,16 @@ void __init reserve_bootmem_generic(unsi
+
+ /* Should check here against the e820 map to avoid double free */
+ #ifdef CONFIG_NUMA
+- reserve_bootmem_node(NODE_DATA(nid), phys, len, BOOTMEM_DEFAULT);
++ nid = phys_to_nid(phys);
++ next_nid = phys_to_nid(phys + len - 1);
++ if (nid == next_nid)
++ reserve_bootmem_node(NODE_DATA(nid), phys, len, BOOTMEM_DEFAULT);
++ else
++ reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
+ #else
+ reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
+ #endif
++
+ #ifndef CONFIG_XEN
+ if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {
+ static unsigned long dma_reserve __initdata;
+@@ -1160,6 +1320,10 @@ const char *arch_vma_name(struct vm_area
+ /*
+ * Initialise the sparsemem vmemmap using huge-pages at the PMD level.
+ */
++static long __meminitdata addr_start, addr_end;
++static void __meminitdata *p_start, *p_end;
++static int __meminitdata node_start;
++
+ int __meminit
+ vmemmap_populate(struct page *start_page, unsigned long size, int node)
+ {
+@@ -1194,12 +1358,32 @@ vmemmap_populate(struct page *start_page
+ PAGE_KERNEL_LARGE);
+ set_pmd(pmd, __pmd_ma(__pte_val(entry)));
+
+- printk(KERN_DEBUG " [%lx-%lx] PMD ->%p on node %d\n",
+- addr, addr + PMD_SIZE - 1, p, node);
++ /* check to see if we have contiguous blocks */
++ if (p_end != p || node_start != node) {
++ if (p_start)
++ printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n",
++ addr_start, addr_end-1, p_start, p_end-1, node_start);
++ addr_start = addr;
++ node_start = node;
++ p_start = p;
++ }
++ addr_end = addr + PMD_SIZE;
++ p_end = p + PMD_SIZE;
+ } else {
+ vmemmap_verify((pte_t *)pmd, node, addr, next);
+ }
+ }
+ return 0;
+ }
++
++void __meminit vmemmap_populate_print_last(void)
++{
++ if (p_start) {
++ printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n",
++ addr_start, addr_end-1, p_start, p_end-1, node_start);
++ p_start = NULL;
++ p_end = NULL;
++ node_start = 0;
++ }
++}
+ #endif
+--- a/arch/x86/mm/ioremap-xen.c
++++ b/arch/x86/mm/ioremap-xen.c
+@@ -20,14 +20,11 @@
+ #include <asm/pgtable.h>
+ #include <asm/tlbflush.h>
+ #include <asm/pgalloc.h>
++#include <asm/pat.h>
+
+-enum ioremap_mode {
+- IOR_MODE_UNCACHED,
+- IOR_MODE_CACHED,
+-};
+-
+-#if defined(CONFIG_X86_64) && !defined(CONFIG_XEN)
++#ifdef CONFIG_X86_64
+
++#ifndef CONFIG_XEN
+ unsigned long __phys_addr(unsigned long x)
+ {
+ if (x >= __START_KERNEL_map)
+@@ -35,6 +32,19 @@ unsigned long __phys_addr(unsigned long
+ return x - PAGE_OFFSET;
+ }
+ EXPORT_SYMBOL(__phys_addr);
++#endif
++
++static inline int phys_addr_valid(unsigned long addr)
++{
++ return addr < (1UL << boot_cpu_data.x86_phys_bits);
++}
++
++#else
++
++static inline int phys_addr_valid(unsigned long addr)
++{
++ return 1;
++}
+
+ #endif
+
+@@ -92,7 +102,8 @@ static int __direct_remap_pfn_range(stru
+ * Fill in the machine address: PTE ptr is done later by
+ * apply_to_page_range().
+ */
+- v->val = __pte_val(pfn_pte_ma(mfn, prot)) | _PAGE_IO;
++ v->val = __pte_val(pte_mkspecial(pfn_pte_ma(mfn, prot)))
++ | _PAGE_IO;
+
+ mfn++;
+ address += PAGE_SIZE;
+@@ -189,10 +200,9 @@ int touch_pte_range(struct mm_struct *mm
+
+ EXPORT_SYMBOL(touch_pte_range);
+
+-#ifdef CONFIG_X86_32
+ int page_is_ram(unsigned long pagenr)
+ {
+- unsigned long addr, end;
++ resource_size_t addr, end;
+ int i;
+
+ #ifndef CONFIG_XEN
+@@ -228,31 +238,51 @@ int page_is_ram(unsigned long pagenr)
+ }
+ return 0;
+ }
+-#endif
+
+ /*
+ * Fix up the linear direct mapping of the kernel to avoid cache attribute
+ * conflicts.
+ */
+ static int ioremap_change_attr(unsigned long vaddr, unsigned long size,
+- enum ioremap_mode mode)
++ unsigned long prot_val)
+ {
+ unsigned long nrpages = size >> PAGE_SHIFT;
+ int err;
+
+- switch (mode) {
+- case IOR_MODE_UNCACHED:
++ switch (prot_val) {
++ case _PAGE_CACHE_UC:
+ default:
+- err = set_memory_uc(vaddr, nrpages);
++ err = _set_memory_uc(vaddr, nrpages);
++ break;
++ case _PAGE_CACHE_WC:
++ err = _set_memory_wc(vaddr, nrpages);
+ break;
+- case IOR_MODE_CACHED:
+- err = set_memory_wb(vaddr, nrpages);
++ case _PAGE_CACHE_WB:
++ err = _set_memory_wb(vaddr, nrpages);
+ break;
+ }
+
+ return err;
+ }
+
++int ioremap_check_change_attr(unsigned long mfn, unsigned long size,
++ unsigned long prot_val)
++{
++ unsigned long sz;
++ int rc;
++
++ for (sz = rc = 0; sz < size && !rc; ++mfn, sz += PAGE_SIZE) {
++ unsigned long pfn = mfn_to_local_pfn(mfn);
++
++ if (pfn >= max_pfn_mapped)
++ continue;
++ rc = ioremap_change_attr((unsigned long)__va(pfn << PAGE_SHIFT),
++ PAGE_SIZE, prot_val);
++ }
++
++ return rc;
++}
++
+ /*
+ * Remap an arbitrary physical address space into the kernel virtual
+ * address space. Needed when the kernel wants to access high addresses
+@@ -262,12 +292,15 @@ static int ioremap_change_attr(unsigned
+ * have to convert them into an offset in a page-aligned mapping, but the
+ * caller shouldn't need to know that small detail.
+ */
+-static void __iomem *__ioremap(resource_size_t phys_addr, unsigned long size,
+- enum ioremap_mode mode)
++static void __iomem *__ioremap_caller(resource_size_t phys_addr,
++ unsigned long size, unsigned long prot_val, void *caller)
+ {
+- unsigned long mfn, offset, last_addr, vaddr;
++ unsigned long mfn, offset, vaddr;
++ resource_size_t last_addr;
+ struct vm_struct *area;
++ unsigned long new_prot_val;
+ pgprot_t prot;
++ int retval;
+ domid_t domid = DOMID_IO;
+
+ /* Don't allow wraparound or zero size */
+@@ -275,6 +308,13 @@ static void __iomem *__ioremap(resource_
+ if (!size || last_addr < phys_addr)
+ return NULL;
+
++ if (!phys_addr_valid(phys_addr)) {
++ printk(KERN_WARNING "ioremap: invalid physical address %llx\n",
++ (unsigned long long)phys_addr);
++ WARN_ON_ONCE(1);
++ return NULL;
++ }
++
+ /*
+ * Don't remap the low PCI/ISA area, it's always mapped..
+ */
+@@ -287,55 +327,86 @@ static void __iomem *__ioremap(resource_
+ for (mfn = PFN_DOWN(phys_addr); mfn < PFN_UP(last_addr); mfn++) {
+ unsigned long pfn = mfn_to_local_pfn(mfn);
+
+- if (pfn >= max_pfn)
+- continue;
++ if (pfn_valid(pfn)) {
++ if (!PageReserved(pfn_to_page(pfn)))
++ return NULL;
++ domid = DOMID_SELF;
++ }
++ }
++ WARN_ON_ONCE(domid == DOMID_SELF);
+
+- domid = DOMID_SELF;
++ /*
++ * Mappings have to be page-aligned
++ */
++ offset = phys_addr & ~PAGE_MASK;
++ phys_addr &= PAGE_MASK;
++ size = PAGE_ALIGN(last_addr+1) - phys_addr;
+
+- if (pfn >= max_pfn_mapped) /* bogus */
+- continue;
++ retval = reserve_memtype(phys_addr, phys_addr + size,
++ prot_val, &new_prot_val);
++ if (retval) {
++ pr_debug("Warning: reserve_memtype returned %d\n", retval);
++ return NULL;
++ }
+
+- if (pfn_valid(pfn) && !PageReserved(pfn_to_page(pfn)))
++ if (prot_val != new_prot_val) {
++ /*
++ * Do not fallback to certain memory types with certain
++ * requested type:
++ * - request is uc-, return cannot be write-back
++ * - request is uc-, return cannot be write-combine
++ * - request is write-combine, return cannot be write-back
++ */
++ if ((prot_val == _PAGE_CACHE_UC_MINUS &&
++ (new_prot_val == _PAGE_CACHE_WB ||
++ new_prot_val == _PAGE_CACHE_WC)) ||
++ (prot_val == _PAGE_CACHE_WC &&
++ new_prot_val == _PAGE_CACHE_WB)) {
++ pr_debug(
++ "ioremap error for 0x%llx-0x%llx, requested 0x%lx, got 0x%lx\n",
++ (unsigned long long)phys_addr,
++ (unsigned long long)(phys_addr + size),
++ prot_val, new_prot_val);
++ free_memtype(phys_addr, phys_addr + size);
+ return NULL;
++ }
++ prot_val = new_prot_val;
+ }
+
+- switch (mode) {
+- case IOR_MODE_UNCACHED:
++ switch (prot_val) {
++ case _PAGE_CACHE_UC:
+ default:
+- /*
+- * FIXME: we will use UC MINUS for now, as video fb drivers
+- * depend on it. Upcoming ioremap_wc() will fix this behavior.
+- */
++ prot = PAGE_KERNEL_NOCACHE;
++ break;
++ case _PAGE_CACHE_UC_MINUS:
+ prot = PAGE_KERNEL_UC_MINUS;
+ break;
+- case IOR_MODE_CACHED:
++ case _PAGE_CACHE_WC:
++ prot = PAGE_KERNEL_WC;
++ break;
++ case _PAGE_CACHE_WB:
+ prot = PAGE_KERNEL;
+ break;
+ }
+
+ /*
+- * Mappings have to be page-aligned
+- */
+- offset = phys_addr & ~PAGE_MASK;
+- phys_addr &= PAGE_MASK;
+- size = PAGE_ALIGN(last_addr+1) - phys_addr;
+-
+- /*
+ * Ok, go for it..
+ */
+- area = get_vm_area(size, VM_IOREMAP | (mode << 20));
++ area = get_vm_area_caller(size, VM_IOREMAP, caller);
+ if (!area)
+ return NULL;
+ area->phys_addr = phys_addr;
+ vaddr = (unsigned long) area->addr;
+ if (__direct_remap_pfn_range(&init_mm, vaddr, PFN_DOWN(phys_addr),
+ size, prot, domid)) {
++ free_memtype(phys_addr, phys_addr + size);
+ free_vm_area(area);
+ return NULL;
+ }
+
+- if (ioremap_change_attr(vaddr, size, mode) < 0) {
+- iounmap((void __iomem *) vaddr);
++ if (ioremap_change_attr(vaddr, size, prot_val) < 0) {
++ free_memtype(phys_addr, phys_addr + size);
++ vunmap(area->addr);
+ return NULL;
+ }
+
+@@ -365,16 +436,72 @@ static void __iomem *__ioremap(resource_
+ */
+ void __iomem *ioremap_nocache(resource_size_t phys_addr, unsigned long size)
+ {
+- return __ioremap(phys_addr, size, IOR_MODE_UNCACHED);
++ /*
++ * Ideally, this should be:
++ * pat_wc_enabled ? _PAGE_CACHE_UC : _PAGE_CACHE_UC_MINUS;
++ *
++ * Till we fix all X drivers to use ioremap_wc(), we will use
++ * UC MINUS.
++ */
++ unsigned long val = _PAGE_CACHE_UC_MINUS;
++
++ return __ioremap_caller(phys_addr, size, val,
++ __builtin_return_address(0));
+ }
+ EXPORT_SYMBOL(ioremap_nocache);
+
++/**
++ * ioremap_wc - map memory into CPU space write combined
++ * @offset: bus address of the memory
++ * @size: size of the resource to map
++ *
++ * This version of ioremap ensures that the memory is marked write combining.
++ * Write combining allows faster writes to some hardware devices.
++ *
++ * Must be freed with iounmap.
++ */
++void __iomem *ioremap_wc(unsigned long phys_addr, unsigned long size)
++{
++ if (pat_wc_enabled)
++ return __ioremap_caller(phys_addr, size, _PAGE_CACHE_WC,
++ __builtin_return_address(0));
++ else
++ return ioremap_nocache(phys_addr, size);
++}
++EXPORT_SYMBOL(ioremap_wc);
++
+ void __iomem *ioremap_cache(resource_size_t phys_addr, unsigned long size)
+ {
+- return __ioremap(phys_addr, size, IOR_MODE_CACHED);
++ return __ioremap_caller(phys_addr, size, _PAGE_CACHE_WB,
++ __builtin_return_address(0));
+ }
+ EXPORT_SYMBOL(ioremap_cache);
+
++#ifndef CONFIG_XEN
++static void __iomem *ioremap_default(resource_size_t phys_addr,
++ unsigned long size)
++{
++ unsigned long flags;
++ void *ret;
++ int err;
++
++ /*
++ * - WB for WB-able memory and no other conflicting mappings
++ * - UC_MINUS for non-WB-able memory with no other conflicting mappings
++ * - Inherit from confliting mappings otherwise
++ */
++ err = reserve_memtype(phys_addr, phys_addr + size, -1, &flags);
++ if (err < 0)
++ return NULL;
++
++ ret = (void *) __ioremap_caller(phys_addr, size, flags,
++ __builtin_return_address(0));
++
++ free_memtype(phys_addr, phys_addr + size);
++ return (void __iomem *)ret;
++}
++#endif
++
+ /**
+ * iounmap - Free a IO remapping
+ * @addr: virtual address from ioremap_*
+@@ -417,15 +544,7 @@ void iounmap(volatile void __iomem *addr
+ return;
+ }
+
+- if ((p->flags >> 20) != IOR_MODE_CACHED) {
+- unsigned long n = get_vm_area_size(p) >> PAGE_SHIFT;
+- unsigned long mfn = p->phys_addr;
+- unsigned long va = (unsigned long)addr;
+-
+- for (; n > 0; n--, mfn++, va += PAGE_SIZE)
+- if (mfn_to_local_pfn(mfn) < max_pfn)
+- set_memory_wb(va, 1);
+- }
++ free_memtype(p->phys_addr, p->phys_addr + get_vm_area_size(p));
+
+ /* Finally remove it */
+ o = remove_vm_area((void *)addr);
+@@ -434,6 +553,37 @@ void iounmap(volatile void __iomem *addr
+ }
+ EXPORT_SYMBOL(iounmap);
+
++#ifndef CONFIG_XEN
++/*
++ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
++ * access
++ */
++void *xlate_dev_mem_ptr(unsigned long phys)
++{
++ void *addr;
++ unsigned long start = phys & PAGE_MASK;
++
++ /* If page is RAM, we can use __va. Otherwise ioremap and unmap. */
++ if (page_is_ram(start >> PAGE_SHIFT))
++ return __va(phys);
++
++ addr = (void *)ioremap_default(start, PAGE_SIZE);
++ if (addr)
++ addr = (void *)((unsigned long)addr | (phys & ~PAGE_MASK));
++
++ return addr;
++}
++
++void unxlate_dev_mem_ptr(unsigned long phys, void *addr)
++{
++ if (page_is_ram(phys >> PAGE_SHIFT))
++ return;
++
++ iounmap((void __iomem *)((unsigned long)addr & PAGE_MASK));
++ return;
++}
++#endif
++
+ int __initdata early_ioremap_debug;
+
+ static int __init early_ioremap_debug_setup(char *str)
+@@ -445,8 +595,8 @@ static int __init early_ioremap_debug_se
+ early_param("early_ioremap_debug", early_ioremap_debug_setup);
+
+ static __initdata int after_paging_init;
+-static __initdata pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)]
+- __attribute__((aligned(PAGE_SIZE)));
++static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)]
++ __section(.bss.page_aligned);
+
+ #ifdef CONFIG_X86_32
+ static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
+@@ -461,8 +611,8 @@ static inline pmd_t * __init early_iorem
+ }
+ #else
+ #define early_ioremap_pmd early_get_pmd
++#undef make_lowmem_page_readonly
+ #define make_lowmem_page_readonly early_make_page_readonly
+-#define make_lowmem_page_writable make_page_writable
+ #endif
+
+ static inline pte_t * __init early_ioremap_pte(unsigned long addr)
+@@ -511,7 +661,7 @@ void __init early_ioremap_clear(void)
+ pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
+ pmd_clear(pmd);
+ make_lowmem_page_writable(bm_pte, XENFEAT_writable_page_tables);
+- /* paravirt_release_pt(__pa(bm_pte) >> PAGE_SHIFT); */
++ /* paravirt_release_pte(__pa(bm_pte) >> PAGE_SHIFT); */
+ __flush_tlb_all();
+ }
+
+@@ -652,10 +802,11 @@ void __init early_iounmap(void *addr, un
+ unsigned long offset;
+ unsigned int nrpages;
+ enum fixed_addresses idx;
+- unsigned int nesting;
++ int nesting;
+
+ nesting = --early_ioremap_nested;
+- WARN_ON(nesting < 0);
++ if (WARN_ON(nesting < 0))
++ return;
+
+ if (early_ioremap_debug) {
+ printk(KERN_INFO "early_iounmap(%p, %08lx) [%d]\n", addr,
+--- a/arch/x86/mm/pageattr-xen.c
++++ b/arch/x86/mm/pageattr-xen.c
+@@ -9,6 +9,8 @@
+ #include <linux/slab.h>
+ #include <linux/mm.h>
+ #include <linux/interrupt.h>
++#include <linux/seq_file.h>
++#include <linux/debugfs.h>
+
+ #include <asm/e820.h>
+ #include <asm/processor.h>
+@@ -17,370 +19,7 @@
+ #include <asm/uaccess.h>
+ #include <asm/pgalloc.h>
+ #include <asm/proto.h>
+-#include <asm/mmu_context.h>
+-
+-#ifndef CONFIG_X86_64
+-#define TASK_SIZE64 TASK_SIZE
+-#endif
+-
+-static void _pin_lock(struct mm_struct *mm, int lock) {
+- if (lock)
+- spin_lock(&mm->page_table_lock);
+-#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
+- /* While mm->page_table_lock protects us against insertions and
+- * removals of higher level page table pages, it doesn't protect
+- * against updates of pte-s. Such updates, however, require the
+- * pte pages to be in consistent state (unpinned+writable or
+- * pinned+readonly). The pinning and attribute changes, however
+- * cannot be done atomically, which is why such updates must be
+- * prevented from happening concurrently.
+- * Note that no pte lock can ever elsewhere be acquired nesting
+- * with an already acquired one in the same mm, or with the mm's
+- * page_table_lock already acquired, as that would break in the
+- * non-split case (where all these are actually resolving to the
+- * one page_table_lock). Thus acquiring all of them here is not
+- * going to result in dead locks, and the order of acquires
+- * doesn't matter.
+- */
+- {
+- pgd_t *pgd = mm->pgd;
+- unsigned g;
+-
+- for (g = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
+- pud_t *pud;
+- unsigned u;
+-
+- if (pgd_none(*pgd))
+- continue;
+- pud = pud_offset(pgd, 0);
+- for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
+- pmd_t *pmd;
+- unsigned m;
+-
+- if (pud_none(*pud))
+- continue;
+- pmd = pmd_offset(pud, 0);
+- for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
+- spinlock_t *ptl;
+-
+- if (pmd_none(*pmd))
+- continue;
+- ptl = pte_lockptr(0, pmd);
+- if (lock)
+- spin_lock(ptl);
+- else
+- spin_unlock(ptl);
+- }
+- }
+- }
+- }
+-#endif
+- if (!lock)
+- spin_unlock(&mm->page_table_lock);
+-}
+-#define pin_lock(mm) _pin_lock(mm, 1)
+-#define pin_unlock(mm) _pin_lock(mm, 0)
+-
+-#define PIN_BATCH sizeof(void *)
+-static DEFINE_PER_CPU(multicall_entry_t[PIN_BATCH], pb_mcl);
+-
+-static inline unsigned int pgd_walk_set_prot(struct page *page, pgprot_t flags,
+- unsigned int cpu, unsigned int seq)
+-{
+- unsigned long pfn = page_to_pfn(page);
+-
+- if (PageHighMem(page)) {
+- if (pgprot_val(flags) & _PAGE_RW)
+- ClearPagePinned(page);
+- else
+- SetPagePinned(page);
+- } else {
+- MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
+- (unsigned long)__va(pfn << PAGE_SHIFT),
+- pfn_pte(pfn, flags), 0);
+- if (unlikely(++seq == PIN_BATCH)) {
+- if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
+- PIN_BATCH, NULL)))
+- BUG();
+- seq = 0;
+- }
+- }
+-
+- return seq;
+-}
+-
+-static void pgd_walk(pgd_t *pgd_base, pgprot_t flags)
+-{
+- pgd_t *pgd = pgd_base;
+- pud_t *pud;
+- pmd_t *pmd;
+- int g,u,m;
+- unsigned int cpu, seq;
+- multicall_entry_t *mcl;
+-
+- if (xen_feature(XENFEAT_auto_translated_physmap))
+- return;
+-
+- cpu = get_cpu();
+-
+- /*
+- * Cannot iterate up to USER_PTRS_PER_PGD on x86-64 as these pagetables
+- * may not be the 'current' task's pagetables (e.g., current may be
+- * 32-bit, but the pagetables may be for a 64-bit task).
+- * Subtracting 1 from TASK_SIZE64 means the loop limit is correct
+- * regardless of whether TASK_SIZE64 is a multiple of PGDIR_SIZE.
+- */
+- for (g = 0, seq = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
+- if (pgd_none(*pgd))
+- continue;
+- pud = pud_offset(pgd, 0);
+- if (PTRS_PER_PUD > 1) /* not folded */
+- seq = pgd_walk_set_prot(virt_to_page(pud),flags,cpu,seq);
+- for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
+- if (pud_none(*pud))
+- continue;
+- pmd = pmd_offset(pud, 0);
+- if (PTRS_PER_PMD > 1) /* not folded */
+- seq = pgd_walk_set_prot(virt_to_page(pmd),flags,cpu,seq);
+- for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
+- if (pmd_none(*pmd))
+- continue;
+- seq = pgd_walk_set_prot(pmd_page(*pmd),flags,cpu,seq);
+- }
+- }
+- }
+-
+- mcl = per_cpu(pb_mcl, cpu);
+-#ifdef CONFIG_X86_64
+- if (unlikely(seq > PIN_BATCH - 2)) {
+- if (unlikely(HYPERVISOR_multicall_check(mcl, seq, NULL)))
+- BUG();
+- seq = 0;
+- }
+- MULTI_update_va_mapping(mcl + seq,
+- (unsigned long)__user_pgd(pgd_base),
+- pfn_pte(virt_to_phys(__user_pgd(pgd_base))>>PAGE_SHIFT, flags),
+- 0);
+- MULTI_update_va_mapping(mcl + seq + 1,
+- (unsigned long)pgd_base,
+- pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
+- UVMF_TLB_FLUSH);
+- if (unlikely(HYPERVISOR_multicall_check(mcl, seq + 2, NULL)))
+- BUG();
+-#else
+- if (likely(seq != 0)) {
+- MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
+- (unsigned long)pgd_base,
+- pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
+- UVMF_TLB_FLUSH);
+- if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
+- seq + 1, NULL)))
+- BUG();
+- } else if(HYPERVISOR_update_va_mapping((unsigned long)pgd_base,
+- pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
+- UVMF_TLB_FLUSH))
+- BUG();
+-#endif
+-
+- put_cpu();
+-}
+-
+-static void __pgd_pin(pgd_t *pgd)
+-{
+- pgd_walk(pgd, PAGE_KERNEL_RO);
+- kmap_flush_unused();
+- xen_pgd_pin(__pa(pgd)); /* kernel */
+-#ifdef CONFIG_X86_64
+- xen_pgd_pin(__pa(__user_pgd(pgd))); /* user */
+-#endif
+- SetPagePinned(virt_to_page(pgd));
+-}
+-
+-static void __pgd_unpin(pgd_t *pgd)
+-{
+- xen_pgd_unpin(__pa(pgd));
+-#ifdef CONFIG_X86_64
+- xen_pgd_unpin(__pa(__user_pgd(pgd)));
+-#endif
+- pgd_walk(pgd, PAGE_KERNEL);
+- ClearPagePinned(virt_to_page(pgd));
+-}
+-
+-void pgd_test_and_unpin(pgd_t *pgd)
+-{
+- if (PagePinned(virt_to_page(pgd)))
+- __pgd_unpin(pgd);
+-}
+-
+-void mm_pin(struct mm_struct *mm)
+-{
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+-
+- pin_lock(mm);
+- __pgd_pin(mm->pgd);
+- pin_unlock(mm);
+-}
+-
+-void mm_unpin(struct mm_struct *mm)
+-{
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+-
+- pin_lock(mm);
+- __pgd_unpin(mm->pgd);
+- pin_unlock(mm);
+-}
+-
+-void mm_pin_all(void)
+-{
+- struct page *page;
+- unsigned long flags;
+-
+- if (xen_feature(XENFEAT_writable_page_tables))
+- return;
+-
+- /*
+- * Allow uninterrupted access to the pgd_list. Also protects
+- * __pgd_pin() by disabling preemption.
+- * All other CPUs must be at a safe point (e.g., in stop_machine
+- * or offlined entirely).
+- */
+- spin_lock_irqsave(&pgd_lock, flags);
+- list_for_each_entry(page, &pgd_list, lru) {
+- if (!PagePinned(page))
+- __pgd_pin((pgd_t *)page_address(page));
+- }
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-}
+-
+-void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
+-{
+- if (!PagePinned(virt_to_page(mm->pgd)))
+- mm_pin(mm);
+-}
+-
+-void arch_exit_mmap(struct mm_struct *mm)
+-{
+- struct task_struct *tsk = current;
+-
+- task_lock(tsk);
+-
+- /*
+- * We aggressively remove defunct pgd from cr3. We execute unmap_vmas()
+- * *much* faster this way, as no tlb flushes means bigger wrpt batches.
+- */
+- if (tsk->active_mm == mm) {
+- tsk->active_mm = &init_mm;
+- atomic_inc(&init_mm.mm_count);
+-
+- switch_mm(mm, &init_mm, tsk);
+-
+- atomic_dec(&mm->mm_count);
+- BUG_ON(atomic_read(&mm->mm_count) == 0);
+- }
+-
+- task_unlock(tsk);
+-
+- if (PagePinned(virt_to_page(mm->pgd))
+- && atomic_read(&mm->mm_count) == 1
+- && !mm->context.has_foreign_mappings)
+- mm_unpin(mm);
+-}
+-
+-static void _pte_free(struct page *page, unsigned int order)
+-{
+- BUG_ON(order);
+- __pte_free(page);
+-}
+-
+-pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
+-{
+- struct page *pte;
+-
+-#ifdef CONFIG_HIGHPTE
+- pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO, 0);
+-#else
+- pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+-#endif
+- if (pte) {
+- pgtable_page_ctor(pte);
+- SetPageForeign(pte, _pte_free);
+- init_page_count(pte);
+- }
+- return pte;
+-}
+-
+-void __pte_free(pgtable_t pte)
+-{
+- if (!PageHighMem(pte)) {
+- unsigned long va = (unsigned long)page_address(pte);
+- unsigned int level;
+- pte_t *ptep = lookup_address(va, &level);
+-
+- BUG_ON(!ptep || level != PG_LEVEL_4K || !pte_present(*ptep));
+- if (!pte_write(*ptep)
+- && HYPERVISOR_update_va_mapping(va,
+- mk_pte(pte, PAGE_KERNEL),
+- 0))
+- BUG();
+- } else
+-#ifdef CONFIG_HIGHPTE
+- ClearPagePinned(pte);
+-#else
+- BUG();
+-#endif
+-
+- ClearPageForeign(pte);
+- init_page_count(pte);
+- pgtable_page_dtor(pte);
+- __free_page(pte);
+-}
+-
+-#if PAGETABLE_LEVELS >= 3
+-static void _pmd_free(struct page *page, unsigned int order)
+-{
+- BUG_ON(order);
+- __pmd_free(page);
+-}
+-
+-pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+-{
+- struct page *pmd;
+-
+- pmd = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+- if (!pmd)
+- return NULL;
+- SetPageForeign(pmd, _pmd_free);
+- init_page_count(pmd);
+- return page_address(pmd);
+-}
+-
+-void __pmd_free(pgtable_t pmd)
+-{
+- unsigned long va = (unsigned long)page_address(pmd);
+- unsigned int level;
+- pte_t *ptep = lookup_address(va, &level);
+-
+- BUG_ON(!ptep || level != PG_LEVEL_4K || !pte_present(*ptep));
+- if (!pte_write(*ptep)
+- && HYPERVISOR_update_va_mapping(va, mk_pte(pmd, PAGE_KERNEL), 0))
+- BUG();
+-
+- ClearPageForeign(pmd);
+- init_page_count(pmd);
+- __free_page(pmd);
+-}
+-#endif
+-
+-/* blktap and gntdev need this, as otherwise they would implicitly (and
+- * needlessly, as they never use it) reference init_mm. */
+-pte_t xen_ptep_get_and_clear_full(struct vm_area_struct *vma,
+- unsigned long addr, pte_t *ptep, int full)
+-{
+- return ptep_get_and_clear_full(vma->vm_mm, addr, ptep, full);
+-}
+-EXPORT_SYMBOL_GPL(xen_ptep_get_and_clear_full);
++#include <asm/pat.h>
+
+ /*
+ * The current flushing context - we pass it instead of 5 arguments:
+@@ -392,6 +31,7 @@ struct cpa_data {
+ int numpages;
+ int flushtlb;
+ unsigned long pfn;
++ unsigned force_split : 1;
+ };
+
+ #ifdef CONFIG_X86_64
+@@ -637,6 +277,9 @@ try_preserve_large_page(pte_t *kpte, uns
+ int i, do_split = 1;
+ unsigned int level;
+
++ if (cpa->force_split)
++ return 1;
++
+ spin_lock_irqsave(&pgd_lock, flags);
+ /*
+ * Check for races, another CPU might have split this page
+@@ -856,9 +499,7 @@ static int split_large_page(pte_t *kpte,
+ goto out_unlock;
+
+ pbase = (pte_t *)page_address(base);
+-#ifdef CONFIG_X86_32
+- paravirt_alloc_pt(&init_mm, page_to_pfn(base));
+-#endif
++ paravirt_alloc_pte(&init_mm, page_to_pfn(base));
+ ref_prot = pte_pgprot(pte_clrhuge(*kpte));
+
+ #ifdef CONFIG_X86_64
+@@ -918,7 +559,7 @@ static int __change_page_attr(struct cpa
+ repeat:
+ kpte = lookup_address(address, &level);
+ if (!kpte)
+- return primary ? -EINVAL : 0;
++ return 0;
+
+ old_pte = *kpte;
+ if (!__pte_val(old_pte)) {
+@@ -1077,7 +718,8 @@ static inline int cache_attr(pgprot_t at
+ }
+
+ static int change_page_attr_set_clr(unsigned long addr, int numpages,
+- pgprot_t mask_set, pgprot_t mask_clr)
++ pgprot_t mask_set, pgprot_t mask_clr,
++ int force_split)
+ {
+ struct cpa_data cpa;
+ int ret, cache, checkalias;
+@@ -1088,7 +730,7 @@ static int change_page_attr_set_clr(unsi
+ */
+ mask_set = canon_pgprot(mask_set);
+ mask_clr = canon_pgprot(mask_clr);
+- if (!pgprot_val(mask_set) && !pgprot_val(mask_clr))
++ if (!pgprot_val(mask_set) && !pgprot_val(mask_clr) && !force_split)
+ return 0;
+
+ /* Ensure we are PAGE_SIZE aligned */
+@@ -1105,6 +747,7 @@ static int change_page_attr_set_clr(unsi
+ cpa.mask_set = mask_set;
+ cpa.mask_clr = mask_clr;
+ cpa.flushtlb = 0;
++ cpa.force_split = force_split;
+
+ /* No alias checking for _NX bit modifications */
+ checkalias = (pgprot_val(mask_set) | pgprot_val(mask_clr)) != _PAGE_NX;
+@@ -1143,26 +786,67 @@ out:
+ static inline int change_page_attr_set(unsigned long addr, int numpages,
+ pgprot_t mask)
+ {
+- return change_page_attr_set_clr(addr, numpages, mask, __pgprot(0));
++ return change_page_attr_set_clr(addr, numpages, mask, __pgprot(0), 0);
+ }
+
+ static inline int change_page_attr_clear(unsigned long addr, int numpages,
+ pgprot_t mask)
+ {
+- return change_page_attr_set_clr(addr, numpages, __pgprot(0), mask);
++ return change_page_attr_set_clr(addr, numpages, __pgprot(0), mask, 0);
+ }
+
+-int set_memory_uc(unsigned long addr, int numpages)
++int _set_memory_uc(unsigned long addr, int numpages)
+ {
++ /*
++ * for now UC MINUS. see comments in ioremap_nocache()
++ */
+ return change_page_attr_set(addr, numpages,
+- __pgprot(_PAGE_PCD));
++ __pgprot(_PAGE_CACHE_UC_MINUS));
++}
++
++int set_memory_uc(unsigned long addr, int numpages)
++{
++ /*
++ * for now UC MINUS. see comments in ioremap_nocache()
++ */
++ if (reserve_memtype(addr, addr + numpages * PAGE_SIZE,
++ _PAGE_CACHE_UC_MINUS, NULL))
++ return -EINVAL;
++
++ return _set_memory_uc(addr, numpages);
+ }
+ EXPORT_SYMBOL(set_memory_uc);
+
+-int set_memory_wb(unsigned long addr, int numpages)
++int _set_memory_wc(unsigned long addr, int numpages)
++{
++ return change_page_attr_set(addr, numpages,
++ __pgprot(_PAGE_CACHE_WC));
++}
++
++int set_memory_wc(unsigned long addr, int numpages)
++{
++ if (!pat_wc_enabled)
++ return set_memory_uc(addr, numpages);
++
++ if (reserve_memtype(addr, addr + numpages * PAGE_SIZE,
++ _PAGE_CACHE_WC, NULL))
++ return -EINVAL;
++
++ return _set_memory_wc(addr, numpages);
++}
++EXPORT_SYMBOL(set_memory_wc);
++
++int _set_memory_wb(unsigned long addr, int numpages)
+ {
+ return change_page_attr_clear(addr, numpages,
+- __pgprot(_PAGE_PCD | _PAGE_PWT));
++ __pgprot(_PAGE_CACHE_MASK));
++}
++
++int set_memory_wb(unsigned long addr, int numpages)
++{
++ free_memtype(addr, addr + numpages * PAGE_SIZE);
++
++ return _set_memory_wb(addr, numpages);
+ }
+ EXPORT_SYMBOL(set_memory_wb);
+
+@@ -1193,6 +877,12 @@ int set_memory_np(unsigned long addr, in
+ return change_page_attr_clear(addr, numpages, __pgprot(_PAGE_PRESENT));
+ }
+
++int set_memory_4k(unsigned long addr, int numpages)
++{
++ return change_page_attr_set_clr(addr, numpages, __pgprot(0),
++ __pgprot(0), 1);
++}
++
+ int set_pages_uc(struct page *page, int numpages)
+ {
+ unsigned long addr = (unsigned long)page_address(page);
+@@ -1302,6 +992,45 @@ void kernel_map_pages(struct page *page,
+ cpa_fill_pool(NULL);
+ }
+
++#ifdef CONFIG_DEBUG_FS
++static int dpa_show(struct seq_file *m, void *v)
++{
++ seq_puts(m, "DEBUG_PAGEALLOC\n");
++ seq_printf(m, "pool_size : %lu\n", pool_size);
++ seq_printf(m, "pool_pages : %lu\n", pool_pages);
++ seq_printf(m, "pool_low : %lu\n", pool_low);
++ seq_printf(m, "pool_used : %lu\n", pool_used);
++ seq_printf(m, "pool_failed : %lu\n", pool_failed);
++
++ return 0;
++}
++
++static int dpa_open(struct inode *inode, struct file *filp)
++{
++ return single_open(filp, dpa_show, NULL);
++}
++
++static const struct file_operations dpa_fops = {
++ .open = dpa_open,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++static int __init debug_pagealloc_proc_init(void)
++{
++ struct dentry *de;
++
++ de = debugfs_create_file("debug_pagealloc", 0600, NULL, NULL,
++ &dpa_fops);
++ if (!de)
++ return -ENOMEM;
++
++ return 0;
++}
++__initcall(debug_pagealloc_proc_init);
++#endif
++
+ #ifdef CONFIG_HIBERNATION
+
+ bool kernel_page_present(struct page *page)
+--- /dev/null
++++ b/arch/x86/mm/pat-xen.c
+@@ -0,0 +1,602 @@
++/*
++ * Handle caching attributes in page tables (PAT)
++ *
++ * Authors: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
++ * Suresh B Siddha <suresh.b.siddha@intel.com>
++ *
++ * Loosely based on earlier PAT patchset from Eric Biederman and Andi Kleen.
++ */
++
++#include <linux/mm.h>
++#include <linux/kernel.h>
++#include <linux/gfp.h>
++#include <linux/fs.h>
++#include <linux/bootmem.h>
++
++#include <asm/msr.h>
++#include <asm/tlbflush.h>
++#include <asm/processor.h>
++#include <asm/page.h>
++#include <asm/pgtable.h>
++#include <asm/pat.h>
++#include <asm/e820.h>
++#include <asm/cacheflush.h>
++#include <asm/fcntl.h>
++#include <asm/mtrr.h>
++#include <asm/io.h>
++
++#ifdef CONFIG_X86_PAT
++int __read_mostly pat_wc_enabled = 1;
++
++void __cpuinit pat_disable(char *reason)
++{
++ pat_wc_enabled = 0;
++ printk(KERN_INFO "%s\n", reason);
++}
++
++static int __init nopat(char *str)
++{
++ pat_disable("PAT support disabled.");
++ return 0;
++}
++early_param("nopat", nopat);
++#endif
++
++static u64 __read_mostly boot_pat_state;
++
++enum {
++ PAT_UC = 0, /* uncached */
++ PAT_WC = 1, /* Write combining */
++ PAT_WT = 4, /* Write Through */
++ PAT_WP = 5, /* Write Protected */
++ PAT_WB = 6, /* Write Back (default) */
++ PAT_UC_MINUS = 7, /* UC, but can be overriden by MTRR */
++};
++
++#define PAT(x,y) ((u64)PAT_ ## y << ((x)*8))
++
++void pat_init(void)
++{
++ u64 pat;
++
++ if (!pat_wc_enabled)
++ return;
++
++ /* Paranoia check. */
++ if (!cpu_has_pat) {
++ printk(KERN_ERR "PAT enabled, but CPU feature cleared\n");
++ /*
++ * Panic if this happens on the secondary CPU, and we
++ * switched to PAT on the boot CPU. We have no way to
++ * undo PAT.
++ */
++ BUG_ON(boot_pat_state);
++ }
++
++#ifndef CONFIG_XEN
++ /* Set PWT to Write-Combining. All other bits stay the same */
++ /*
++ * PTE encoding used in Linux:
++ * PAT
++ * |PCD
++ * ||PWT
++ * |||
++ * 000 WB _PAGE_CACHE_WB
++ * 001 WC _PAGE_CACHE_WC
++ * 010 UC- _PAGE_CACHE_UC_MINUS
++ * 011 UC _PAGE_CACHE_UC
++ * PAT bit unused
++ */
++ pat = PAT(0,WB) | PAT(1,WC) | PAT(2,UC_MINUS) | PAT(3,UC) |
++ PAT(4,WB) | PAT(5,WC) | PAT(6,UC_MINUS) | PAT(7,UC);
++
++ /* Boot CPU check */
++ if (!boot_pat_state)
++ rdmsrl(MSR_IA32_CR_PAT, boot_pat_state);
++
++ wrmsrl(MSR_IA32_CR_PAT, pat);
++#else
++ /*
++ * PAT settings are part of the hypervisor interface, and their
++ * assignment cannot be changed.
++ */
++ rdmsrl(MSR_IA32_CR_PAT, pat);
++ if (!boot_pat_state)
++ boot_pat_state = pat;
++#endif
++ printk(KERN_INFO "x86 PAT enabled: cpu %d, old 0x%Lx, new 0x%Lx\n",
++ smp_processor_id(), boot_pat_state, pat);
++}
++
++#undef PAT
++
++static char *cattr_name(unsigned long flags)
++{
++ switch (flags & _PAGE_CACHE_MASK) {
++ case _PAGE_CACHE_UC: return "uncached";
++ case _PAGE_CACHE_UC_MINUS: return "uncached-minus";
++ case _PAGE_CACHE_WB: return "write-back";
++ case _PAGE_CACHE_WC: return "write-combining";
++ case _PAGE_CACHE_WP: return "write-protected";
++ case _PAGE_CACHE_WT: return "write-through";
++ default: return "broken";
++ }
++}
++
++/*
++ * The global memtype list keeps track of memory type for specific
++ * physical memory areas. Conflicting memory types in different
++ * mappings can cause CPU cache corruption. To avoid this we keep track.
++ *
++ * The list is sorted based on starting address and can contain multiple
++ * entries for each address (this allows reference counting for overlapping
++ * areas). All the aliases have the same cache attributes of course.
++ * Zero attributes are represented as holes.
++ *
++ * Currently the data structure is a list because the number of mappings
++ * are expected to be relatively small. If this should be a problem
++ * it could be changed to a rbtree or similar.
++ *
++ * memtype_lock protects the whole list.
++ */
++
++struct memtype {
++ u64 start;
++ u64 end;
++ unsigned long type;
++ struct list_head nd;
++};
++
++static LIST_HEAD(memtype_list);
++static DEFINE_SPINLOCK(memtype_lock); /* protects memtype list */
++
++/*
++ * Does intersection of PAT memory type and MTRR memory type and returns
++ * the resulting memory type as PAT understands it.
++ * (Type in pat and mtrr will not have same value)
++ * The intersection is based on "Effective Memory Type" tables in IA-32
++ * SDM vol 3a
++ */
++static int pat_x_mtrr_type(u64 start, u64 end, unsigned long prot,
++ unsigned long *ret_prot)
++{
++ unsigned long pat_type;
++ u8 mtrr_type;
++
++ pat_type = prot & _PAGE_CACHE_MASK;
++ prot &= (~_PAGE_CACHE_MASK);
++
++ /*
++ * We return the PAT request directly for types where PAT takes
++ * precedence with respect to MTRR and for UC_MINUS.
++ * Consistency checks with other PAT requests is done later
++ * while going through memtype list.
++ */
++ if (pat_type == _PAGE_CACHE_WC) {
++ *ret_prot = prot | _PAGE_CACHE_WC;
++ return 0;
++ } else if (pat_type == _PAGE_CACHE_UC_MINUS) {
++ *ret_prot = prot | _PAGE_CACHE_UC_MINUS;
++ return 0;
++ } else if (pat_type == _PAGE_CACHE_UC) {
++ *ret_prot = prot | _PAGE_CACHE_UC;
++ return 0;
++ }
++
++ /*
++ * Look for MTRR hint to get the effective type in case where PAT
++ * request is for WB.
++ */
++ mtrr_type = mtrr_type_lookup(start, end);
++
++ if (mtrr_type == MTRR_TYPE_UNCACHABLE) {
++ *ret_prot = prot | _PAGE_CACHE_UC;
++ } else if (mtrr_type == MTRR_TYPE_WRCOMB) {
++ *ret_prot = prot | _PAGE_CACHE_WC;
++ } else {
++ *ret_prot = prot | _PAGE_CACHE_WB;
++ }
++
++ return 0;
++}
++
++/*
++ * req_type typically has one of the:
++ * - _PAGE_CACHE_WB
++ * - _PAGE_CACHE_WC
++ * - _PAGE_CACHE_UC_MINUS
++ * - _PAGE_CACHE_UC
++ *
++ * req_type will have a special case value '-1', when requester want to inherit
++ * the memory type from mtrr (if WB), existing PAT, defaulting to UC_MINUS.
++ *
++ * If ret_type is NULL, function will return an error if it cannot reserve the
++ * region with req_type. If ret_type is non-null, function will return
++ * available type in ret_type in case of no error. In case of any error
++ * it will return a negative return value.
++ */
++int reserve_memtype(u64 start, u64 end, unsigned long req_type,
++ unsigned long *ret_type)
++{
++ struct memtype *new_entry = NULL;
++ struct memtype *parse;
++ unsigned long actual_type;
++ int err = 0;
++
++ /* Only track when pat_wc_enabled */
++ if (!pat_wc_enabled) {
++ /* This is identical to page table setting without PAT */
++ if (ret_type) {
++ if (req_type == -1) {
++ *ret_type = _PAGE_CACHE_WB;
++ } else {
++ *ret_type = req_type;
++ }
++ }
++ return 0;
++ }
++
++ /* Low ISA region is always mapped WB in page table. No need to track */
++ if (start >= ISA_START_ADDRESS && (end - 1) <= ISA_END_ADDRESS) {
++ if (ret_type)
++ *ret_type = _PAGE_CACHE_WB;
++
++ return 0;
++ }
++
++ if (req_type == -1) {
++ /*
++ * Call mtrr_lookup to get the type hint. This is an
++ * optimization for /dev/mem mmap'ers into WB memory (BIOS
++ * tools and ACPI tools). Use WB request for WB memory and use
++ * UC_MINUS otherwise.
++ */
++ u8 mtrr_type = mtrr_type_lookup(start, end);
++
++ if (mtrr_type == MTRR_TYPE_WRBACK) {
++ req_type = _PAGE_CACHE_WB;
++ actual_type = _PAGE_CACHE_WB;
++ } else {
++ req_type = _PAGE_CACHE_UC_MINUS;
++ actual_type = _PAGE_CACHE_UC_MINUS;
++ }
++ } else {
++ req_type &= _PAGE_CACHE_MASK;
++ err = pat_x_mtrr_type(start, end, req_type, &actual_type);
++ }
++
++ if (err) {
++ if (ret_type)
++ *ret_type = actual_type;
++
++ return -EINVAL;
++ }
++
++ new_entry = kmalloc(sizeof(struct memtype), GFP_KERNEL);
++ if (!new_entry)
++ return -ENOMEM;
++
++ new_entry->start = start;
++ new_entry->end = end;
++ new_entry->type = actual_type;
++
++ if (ret_type)
++ *ret_type = actual_type;
++
++ spin_lock(&memtype_lock);
++
++ /* Search for existing mapping that overlaps the current range */
++ list_for_each_entry(parse, &memtype_list, nd) {
++ struct memtype *saved_ptr;
++
++ if (parse->start >= end) {
++ pr_debug("New Entry\n");
++ list_add(&new_entry->nd, parse->nd.prev);
++ new_entry = NULL;
++ break;
++ }
++
++ if (start <= parse->start && end >= parse->start) {
++ if (actual_type != parse->type && ret_type) {
++ actual_type = parse->type;
++ *ret_type = actual_type;
++ new_entry->type = actual_type;
++ }
++
++ if (actual_type != parse->type) {
++ printk(
++ KERN_INFO "%s:%d conflicting memory types %Lx-%Lx %s<->%s\n",
++ current->comm, current->pid,
++ start, end,
++ cattr_name(actual_type),
++ cattr_name(parse->type));
++ err = -EBUSY;
++ break;
++ }
++
++ saved_ptr = parse;
++ /*
++ * Check to see whether the request overlaps more
++ * than one entry in the list
++ */
++ list_for_each_entry_continue(parse, &memtype_list, nd) {
++ if (end <= parse->start) {
++ break;
++ }
++
++ if (actual_type != parse->type) {
++ printk(
++ KERN_INFO "%s:%d conflicting memory types %Lx-%Lx %s<->%s\n",
++ current->comm, current->pid,
++ start, end,
++ cattr_name(actual_type),
++ cattr_name(parse->type));
++ err = -EBUSY;
++ break;
++ }
++ }
++
++ if (err) {
++ break;
++ }
++
++ pr_debug("Overlap at 0x%Lx-0x%Lx\n",
++ saved_ptr->start, saved_ptr->end);
++ /* No conflict. Go ahead and add this new entry */
++ list_add(&new_entry->nd, saved_ptr->nd.prev);
++ new_entry = NULL;
++ break;
++ }
++
++ if (start < parse->end) {
++ if (actual_type != parse->type && ret_type) {
++ actual_type = parse->type;
++ *ret_type = actual_type;
++ new_entry->type = actual_type;
++ }
++
++ if (actual_type != parse->type) {
++ printk(
++ KERN_INFO "%s:%d conflicting memory types %Lx-%Lx %s<->%s\n",
++ current->comm, current->pid,
++ start, end,
++ cattr_name(actual_type),
++ cattr_name(parse->type));
++ err = -EBUSY;
++ break;
++ }
++
++ saved_ptr = parse;
++ /*
++ * Check to see whether the request overlaps more
++ * than one entry in the list
++ */
++ list_for_each_entry_continue(parse, &memtype_list, nd) {
++ if (end <= parse->start) {
++ break;
++ }
++
++ if (actual_type != parse->type) {
++ printk(
++ KERN_INFO "%s:%d conflicting memory types %Lx-%Lx %s<->%s\n",
++ current->comm, current->pid,
++ start, end,
++ cattr_name(actual_type),
++ cattr_name(parse->type));
++ err = -EBUSY;
++ break;
++ }
++ }
++
++ if (err) {
++ break;
++ }
++
++ pr_debug(KERN_INFO "Overlap at 0x%Lx-0x%Lx\n",
++ saved_ptr->start, saved_ptr->end);
++ /* No conflict. Go ahead and add this new entry */
++ list_add(&new_entry->nd, &saved_ptr->nd);
++ new_entry = NULL;
++ break;
++ }
++ }
++
++ if (err) {
++ printk(KERN_INFO
++ "reserve_memtype failed 0x%Lx-0x%Lx, track %s, req %s\n",
++ start, end, cattr_name(new_entry->type),
++ cattr_name(req_type));
++ kfree(new_entry);
++ spin_unlock(&memtype_lock);
++ return err;
++ }
++
++ if (new_entry) {
++ /* No conflict. Not yet added to the list. Add to the tail */
++ list_add_tail(&new_entry->nd, &memtype_list);
++ pr_debug("New Entry\n");
++ }
++
++ if (ret_type) {
++ pr_debug(
++ "reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s, ret %s\n",
++ start, end, cattr_name(actual_type),
++ cattr_name(req_type), cattr_name(*ret_type));
++ } else {
++ pr_debug(
++ "reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s\n",
++ start, end, cattr_name(actual_type),
++ cattr_name(req_type));
++ }
++
++ spin_unlock(&memtype_lock);
++ return err;
++}
++
++int free_memtype(u64 start, u64 end)
++{
++ struct memtype *ml;
++ int err = -EINVAL;
++
++ /* Only track when pat_wc_enabled */
++ if (!pat_wc_enabled) {
++ return 0;
++ }
++
++ /* Low ISA region is always mapped WB. No need to track */
++ if (start >= ISA_START_ADDRESS && end <= ISA_END_ADDRESS) {
++ return 0;
++ }
++
++ spin_lock(&memtype_lock);
++ list_for_each_entry(ml, &memtype_list, nd) {
++ if (ml->start == start && ml->end == end) {
++ list_del(&ml->nd);
++ kfree(ml);
++ err = 0;
++ break;
++ }
++ }
++ spin_unlock(&memtype_lock);
++
++ if (err) {
++ printk(KERN_INFO "%s:%d freeing invalid memtype %Lx-%Lx\n",
++ current->comm, current->pid, start, end);
++ }
++
++ pr_debug("free_memtype request 0x%Lx-0x%Lx\n", start, end);
++ return err;
++}
++
++
++/*
++ * /dev/mem mmap interface. The memtype used for mapping varies:
++ * - Use UC for mappings with O_SYNC flag
++ * - Without O_SYNC flag, if there is any conflict in reserve_memtype,
++ * inherit the memtype from existing mapping.
++ * - Else use UC_MINUS memtype (for backward compatibility with existing
++ * X drivers.
++ */
++pgprot_t phys_mem_access_prot(struct file *file, unsigned long mfn,
++ unsigned long size, pgprot_t vma_prot)
++{
++ return vma_prot;
++}
++
++#ifdef CONFIG_NONPROMISC_DEVMEM
++/* This check is done in drivers/char/mem.c in case of NONPROMISC_DEVMEM*/
++static inline int range_is_allowed(unsigned long mfn, unsigned long size)
++{
++ return 1;
++}
++#else
++static inline int range_is_allowed(unsigned long mfn, unsigned long size)
++{
++ u64 from = ((u64)mfn) << PAGE_SHIFT;
++ u64 to = from + size;
++ u64 cursor = from;
++
++ while (cursor < to) {
++ if (!devmem_is_allowed(mfn)) {
++ printk(KERN_INFO
++ "Program %s tried to access /dev/mem between %Lx->%Lx.\n",
++ current->comm, from, to);
++ return 0;
++ }
++ cursor += PAGE_SIZE;
++ mfn++;
++ }
++ return 1;
++}
++#endif /* CONFIG_NONPROMISC_DEVMEM */
++
++int phys_mem_access_prot_allowed(struct file *file, unsigned long mfn,
++ unsigned long size, pgprot_t *vma_prot)
++{
++ u64 addr = (u64)mfn << PAGE_SHIFT;
++ unsigned long flags = _PAGE_CACHE_UC_MINUS;
++ int retval;
++
++ if (!range_is_allowed(mfn, size))
++ return 0;
++
++ if (file->f_flags & O_SYNC) {
++ flags = _PAGE_CACHE_UC;
++ }
++
++#ifndef CONFIG_X86_32
++#ifndef CONFIG_XEN /* Xen sets correct MTRR type on non-RAM for us. */
++ /*
++ * On the PPro and successors, the MTRRs are used to set
++ * memory types for physical addresses outside main memory,
++ * so blindly setting UC or PWT on those pages is wrong.
++ * For Pentiums and earlier, the surround logic should disable
++ * caching for the high addresses through the KEN pin, but
++ * we maintain the tradition of paranoia in this code.
++ */
++ if (!pat_wc_enabled &&
++ ! ( test_bit(X86_FEATURE_MTRR, boot_cpu_data.x86_capability) ||
++ test_bit(X86_FEATURE_K6_MTRR, boot_cpu_data.x86_capability) ||
++ test_bit(X86_FEATURE_CYRIX_ARR, boot_cpu_data.x86_capability) ||
++ test_bit(X86_FEATURE_CENTAUR_MCR, boot_cpu_data.x86_capability)) &&
++ (pfn << PAGE_SHIFT) >= __pa(high_memory)) {
++ flags = _PAGE_CACHE_UC;
++ }
++#endif
++#endif
++
++ /*
++ * With O_SYNC, we can only take UC mapping. Fail if we cannot.
++ * Without O_SYNC, we want to get
++ * - WB for WB-able memory and no other conflicting mappings
++ * - UC_MINUS for non-WB-able memory with no other conflicting mappings
++ * - Inherit from confliting mappings otherwise
++ */
++ if (flags != _PAGE_CACHE_UC_MINUS) {
++ retval = reserve_memtype(addr, addr + size, flags, NULL);
++ } else {
++ retval = reserve_memtype(addr, addr + size, -1, &flags);
++ }
++
++ if (retval < 0)
++ return 0;
++
++ if (ioremap_check_change_attr(mfn, size, flags) < 0) {
++ free_memtype(addr, addr + size);
++ printk(KERN_INFO
++ "%s:%d /dev/mem ioremap_change_attr failed %s for %Lx-%Lx\n",
++ current->comm, current->pid,
++ cattr_name(flags),
++ addr, addr + size);
++ return 0;
++ }
++
++ *vma_prot = __pgprot((pgprot_val(*vma_prot) & ~_PAGE_CACHE_MASK) |
++ flags);
++ return 1;
++}
++
++void map_devmem(unsigned long mfn, unsigned long size, pgprot_t vma_prot)
++{
++ u64 addr = (u64)mfn << PAGE_SHIFT;
++ unsigned long flags;
++ unsigned long want_flags = (pgprot_val(vma_prot) & _PAGE_CACHE_MASK);
++
++ reserve_memtype(addr, addr + size, want_flags, &flags);
++ if (flags != want_flags) {
++ printk(KERN_INFO
++ "%s:%d /dev/mem expected mapping type %s for %Lx-%Lx, got %s\n",
++ current->comm, current->pid,
++ cattr_name(want_flags),
++ addr, (unsigned long long)(addr + size),
++ cattr_name(flags));
++ }
++}
++
++void unmap_devmem(unsigned long mfn, unsigned long size, pgprot_t vma_prot)
++{
++ u64 addr = (u64)mfn << PAGE_SHIFT;
++
++ free_memtype(addr, addr + size);
++}
++
+--- a/arch/x86/mm/pgtable_32-xen.c
++++ b/arch/x86/mm/pgtable_32-xen.c
+@@ -1,7 +1,3 @@
+-/*
+- * linux/arch/i386/mm/pgtable.c
+- */
+-
+ #include <linux/sched.h>
+ #include <linux/kernel.h>
+ #include <linux/errno.h>
+@@ -41,7 +37,6 @@ void show_mem(void)
+
+ printk(KERN_INFO "Mem-info:\n");
+ show_free_areas();
+- printk(KERN_INFO "Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
+ for_each_online_pgdat(pgdat) {
+ pgdat_resize_lock(pgdat, &flags);
+ for (i = 0; i < pgdat->node_spanned_pages; ++i) {
+@@ -157,243 +152,6 @@ void __init reserve_top_address(unsigned
+ __VMALLOC_RESERVE += reserve;
+ }
+
+-pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+-{
+- pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+- if (pte)
+- make_lowmem_page_readonly(pte, XENFEAT_writable_page_tables);
+- return pte;
+-}
+-
+-/*
+- * List of all pgd's needed for non-PAE so it can invalidate entries
+- * in both cached and uncached pgd's; not needed for PAE since the
+- * kernel pmd is shared. If PAE were not to share the pmd a similar
+- * tactic would be needed. This is essentially codepath-based locking
+- * against pageattr.c; it is the unique case in which a valid change
+- * of kernel pagetables can't be lazily synchronized by vmalloc faults.
+- * vmalloc faults work because attached pagetables are never freed.
+- * -- wli
+- */
+-static inline void pgd_list_add(pgd_t *pgd)
+-{
+- struct page *page = virt_to_page(pgd);
+-
+- list_add(&page->lru, &pgd_list);
+-}
+-
+-static inline void pgd_list_del(pgd_t *pgd)
+-{
+- struct page *page = virt_to_page(pgd);
+-
+- list_del(&page->lru);
+-}
+-
+-#define UNSHARED_PTRS_PER_PGD \
+- (SHARED_KERNEL_PMD ? USER_PTRS_PER_PGD : PTRS_PER_PGD)
+-
+-static void pgd_ctor(void *p)
+-{
+- pgd_t *pgd = p;
+- unsigned long flags;
+-
+- pgd_test_and_unpin(pgd);
+-
+- /* Clear usermode parts of PGD */
+- memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
+-
+- spin_lock_irqsave(&pgd_lock, flags);
+-
+- /* If the pgd points to a shared pagetable level (either the
+- ptes in non-PAE, or shared PMD in PAE), then just copy the
+- references from swapper_pg_dir. */
+- if (PAGETABLE_LEVELS == 2 ||
+- (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD)) {
+- clone_pgd_range(pgd + USER_PTRS_PER_PGD,
+- swapper_pg_dir + USER_PTRS_PER_PGD,
+- KERNEL_PGD_PTRS);
+- paravirt_alloc_pd_clone(__pa(pgd) >> PAGE_SHIFT,
+- __pa(swapper_pg_dir) >> PAGE_SHIFT,
+- USER_PTRS_PER_PGD,
+- KERNEL_PGD_PTRS);
+- }
+-
+- /* list required to sync kernel mapping updates */
+- if (PAGETABLE_LEVELS == 2)
+- pgd_list_add(pgd);
+-
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-}
+-
+-static void pgd_dtor(void *pgd)
+-{
+- unsigned long flags; /* can be called from interrupt context */
+-
+- if (!SHARED_KERNEL_PMD) {
+- spin_lock_irqsave(&pgd_lock, flags);
+- pgd_list_del(pgd);
+- spin_unlock_irqrestore(&pgd_lock, flags);
+- }
+-
+- pgd_test_and_unpin(pgd);
+-}
+-
+-#ifdef CONFIG_X86_PAE
+-/*
+- * Mop up any pmd pages which may still be attached to the pgd.
+- * Normally they will be freed by munmap/exit_mmap, but any pmd we
+- * preallocate which never got a corresponding vma will need to be
+- * freed manually.
+- */
+-static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
+-{
+- int i;
+-
+- for(i = 0; i < UNSHARED_PTRS_PER_PGD; i++) {
+- pgd_t pgd = pgdp[i];
+-
+- if (__pgd_val(pgd) != 0) {
+- pmd_t *pmd = (pmd_t *)pgd_page_vaddr(pgd);
+-
+- pgdp[i] = xen_make_pgd(0);
+-
+- paravirt_release_pd(pgd_val(pgd) >> PAGE_SHIFT);
+- pmd_free(mm, pmd);
+- }
+- }
+-}
+-
+-/*
+- * In PAE mode, we need to do a cr3 reload (=tlb flush) when
+- * updating the top-level pagetable entries to guarantee the
+- * processor notices the update. Since this is expensive, and
+- * all 4 top-level entries are used almost immediately in a
+- * new process's life, we just pre-populate them here.
+- *
+- * Also, if we're in a paravirt environment where the kernel pmd is
+- * not shared between pagetables (!SHARED_KERNEL_PMDS), we allocate
+- * and initialize the kernel pmds here.
+- */
+-static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
+-{
+- pud_t *pud;
+- pmd_t *pmds[UNSHARED_PTRS_PER_PGD];
+- unsigned long addr, flags;
+- int i;
+-
+- /*
+- * We can race save/restore (if we sleep during a GFP_KERNEL memory
+- * allocation). We therefore store virtual addresses of pmds as they
+- * do not change across save/restore, and poke the machine addresses
+- * into the pgdir under the pgd_lock.
+- */
+- for (addr = i = 0; i < UNSHARED_PTRS_PER_PGD; i++, addr += PUD_SIZE) {
+- pmds[i] = pmd_alloc_one(mm, addr);
+- if (!pmds[i])
+- goto out_oom;
+- }
+-
+- spin_lock_irqsave(&pgd_lock, flags);
+-
+- /* Protect against save/restore: move below 4GB under pgd_lock. */
+- if (!xen_feature(XENFEAT_pae_pgdir_above_4gb)
+- && xen_create_contiguous_region((unsigned long)pgd, 0, 32)) {
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-out_oom:
+- while (i--)
+- pmd_free(mm, pmds[i]);
+- return 0;
+- }
+-
+- /* Copy kernel pmd contents and write-protect the new pmds. */
+- pud = pud_offset(pgd, 0);
+- for (addr = i = 0; i < UNSHARED_PTRS_PER_PGD;
+- i++, pud++, addr += PUD_SIZE) {
+- if (i >= USER_PTRS_PER_PGD) {
+- memcpy(pmds[i],
+- (pmd_t *)pgd_page_vaddr(swapper_pg_dir[i]),
+- sizeof(pmd_t) * PTRS_PER_PMD);
+- make_lowmem_page_readonly(
+- pmds[i], XENFEAT_writable_page_tables);
+- }
+-
+- /* It is safe to poke machine addresses of pmds under the pgd_lock. */
+- pud_populate(mm, pud, pmds[i]);
+- }
+-
+- /* List required to sync kernel mapping updates and
+- * to pin/unpin on save/restore. */
+- pgd_list_add(pgd);
+-
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-
+- return 1;
+-}
+-#else /* !CONFIG_X86_PAE */
+-/* No need to prepopulate any pagetable entries in non-PAE modes. */
+-static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
+-{
+- return 1;
+-}
+-
+-static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
+-{
+-}
+-#endif /* CONFIG_X86_PAE */
+-
+-pgd_t *pgd_alloc(struct mm_struct *mm)
+-{
+- pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
+-
+- /* so that alloc_pd can use it */
+- mm->pgd = pgd;
+- if (pgd)
+- pgd_ctor(pgd);
+-
+- if (pgd && !pgd_prepopulate_pmd(mm, pgd)) {
+- free_page((unsigned long)pgd);
+- pgd = NULL;
+- }
+-
+- return pgd;
+-}
+-
+-void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+-{
+- /*
+- * After this the pgd should not be pinned for the duration of this
+- * function's execution. We should never sleep and thus never race:
+- * 1. User pmds will not become write-protected under our feet due
+- * to a concurrent mm_pin_all().
+- * 2. The machine addresses in PGD entries will not become invalid
+- * due to a concurrent save/restore.
+- */
+- pgd_dtor(pgd);
+-
+- if (PTRS_PER_PMD > 1 && !xen_feature(XENFEAT_pae_pgdir_above_4gb))
+- xen_destroy_contiguous_region((unsigned long)pgd, 0);
+-
+- pgd_mop_up_pmds(mm, pgd);
+- free_page((unsigned long)pgd);
+-}
+-
+-void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
+-{
+- pgtable_page_dtor(pte);
+- paravirt_release_pt(page_to_pfn(pte));
+- tlb_remove_page(tlb, pte);
+-}
+-
+-#ifdef CONFIG_X86_PAE
+-
+-void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
+-{
+- paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+- tlb_remove_page(tlb, virt_to_page(pmd));
+-}
+-
+-#endif
+-
+ void make_lowmem_page_readonly(void *va, unsigned int feature)
+ {
+ pte_t *pte;
+--- /dev/null
++++ b/arch/x86/mm/pgtable-xen.c
+@@ -0,0 +1,709 @@
++#include <linux/mm.h>
++#include <linux/module.h>
++#include <xen/features.h>
++#include <asm/pgalloc.h>
++#include <asm/pgtable.h>
++#include <asm/tlb.h>
++#include <asm/hypervisor.h>
++#include <asm/mmu_context.h>
++
++pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
++{
++ pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
++ if (pte)
++ make_lowmem_page_readonly(pte, XENFEAT_writable_page_tables);
++ return pte;
++}
++
++static void _pte_free(struct page *page, unsigned int order)
++{
++ BUG_ON(order);
++ __pte_free(page);
++}
++
++pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
++{
++ struct page *pte;
++
++#ifdef CONFIG_HIGHPTE
++ pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO, 0);
++#else
++ pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
++#endif
++ if (pte) {
++ pgtable_page_ctor(pte);
++ SetPageForeign(pte, _pte_free);
++ init_page_count(pte);
++ }
++ return pte;
++}
++
++void __pte_free(pgtable_t pte)
++{
++ if (!PageHighMem(pte)) {
++ unsigned long va = (unsigned long)page_address(pte);
++ unsigned int level;
++ pte_t *ptep = lookup_address(va, &level);
++
++ BUG_ON(!ptep || level != PG_LEVEL_4K || !pte_present(*ptep));
++ if (!pte_write(*ptep)
++ && HYPERVISOR_update_va_mapping(va,
++ mk_pte(pte, PAGE_KERNEL),
++ 0))
++ BUG();
++ } else
++#ifdef CONFIG_HIGHPTE
++ ClearPagePinned(pte);
++#else
++ BUG();
++#endif
++
++ ClearPageForeign(pte);
++ init_page_count(pte);
++ pgtable_page_dtor(pte);
++ __free_page(pte);
++}
++
++void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
++{
++ pgtable_page_dtor(pte);
++ paravirt_release_pte(page_to_pfn(pte));
++ tlb_remove_page(tlb, pte);
++}
++
++#if PAGETABLE_LEVELS > 2
++static void _pmd_free(struct page *page, unsigned int order)
++{
++ BUG_ON(order);
++ __pmd_free(page);
++}
++
++pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
++{
++ struct page *pmd;
++
++ pmd = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
++ if (!pmd)
++ return NULL;
++ SetPageForeign(pmd, _pmd_free);
++ init_page_count(pmd);
++ return page_address(pmd);
++}
++
++void __pmd_free(pgtable_t pmd)
++{
++ unsigned long va = (unsigned long)page_address(pmd);
++ unsigned int level;
++ pte_t *ptep = lookup_address(va, &level);
++
++ BUG_ON(!ptep || level != PG_LEVEL_4K || !pte_present(*ptep));
++ if (!pte_write(*ptep)
++ && HYPERVISOR_update_va_mapping(va, mk_pte(pmd, PAGE_KERNEL), 0))
++ BUG();
++
++ ClearPageForeign(pmd);
++ init_page_count(pmd);
++ __free_page(pmd);
++}
++
++void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
++{
++ paravirt_release_pmd(__pa(pmd) >> PAGE_SHIFT);
++ tlb_remove_page(tlb, virt_to_page(pmd));
++}
++
++#if PAGETABLE_LEVELS > 3
++void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
++{
++ paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
++ tlb_remove_page(tlb, virt_to_page(pud));
++}
++#endif /* PAGETABLE_LEVELS > 3 */
++#endif /* PAGETABLE_LEVELS > 2 */
++
++#ifndef CONFIG_X86_64
++#define TASK_SIZE64 TASK_SIZE
++#endif
++
++static void _pin_lock(struct mm_struct *mm, int lock) {
++ if (lock)
++ spin_lock(&mm->page_table_lock);
++#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
++ /* While mm->page_table_lock protects us against insertions and
++ * removals of higher level page table pages, it doesn't protect
++ * against updates of pte-s. Such updates, however, require the
++ * pte pages to be in consistent state (unpinned+writable or
++ * pinned+readonly). The pinning and attribute changes, however
++ * cannot be done atomically, which is why such updates must be
++ * prevented from happening concurrently.
++ * Note that no pte lock can ever elsewhere be acquired nesting
++ * with an already acquired one in the same mm, or with the mm's
++ * page_table_lock already acquired, as that would break in the
++ * non-split case (where all these are actually resolving to the
++ * one page_table_lock). Thus acquiring all of them here is not
++ * going to result in dead locks, and the order of acquires
++ * doesn't matter.
++ */
++ {
++ pgd_t *pgd = mm->pgd;
++ unsigned g;
++
++ for (g = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
++ pud_t *pud;
++ unsigned u;
++
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ pmd_t *pmd;
++ unsigned m;
++
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++ spinlock_t *ptl;
++
++ if (pmd_none(*pmd))
++ continue;
++ ptl = pte_lockptr(0, pmd);
++ if (lock)
++ spin_lock(ptl);
++ else
++ spin_unlock(ptl);
++ }
++ }
++ }
++ }
++#endif
++ if (!lock)
++ spin_unlock(&mm->page_table_lock);
++}
++#define pin_lock(mm) _pin_lock(mm, 1)
++#define pin_unlock(mm) _pin_lock(mm, 0)
++
++#define PIN_BATCH sizeof(void *)
++static DEFINE_PER_CPU(multicall_entry_t[PIN_BATCH], pb_mcl);
++
++static inline unsigned int pgd_walk_set_prot(struct page *page, pgprot_t flags,
++ unsigned int cpu, unsigned int seq)
++{
++ unsigned long pfn = page_to_pfn(page);
++
++ if (PageHighMem(page)) {
++ if (pgprot_val(flags) & _PAGE_RW)
++ ClearPagePinned(page);
++ else
++ SetPagePinned(page);
++ } else {
++ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, flags), 0);
++ if (unlikely(++seq == PIN_BATCH)) {
++ if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
++ PIN_BATCH, NULL)))
++ BUG();
++ seq = 0;
++ }
++ }
++
++ return seq;
++}
++
++static void pgd_walk(pgd_t *pgd_base, pgprot_t flags)
++{
++ pgd_t *pgd = pgd_base;
++ pud_t *pud;
++ pmd_t *pmd;
++ int g,u,m;
++ unsigned int cpu, seq;
++ multicall_entry_t *mcl;
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return;
++
++ cpu = get_cpu();
++
++ /*
++ * Cannot iterate up to USER_PTRS_PER_PGD on x86-64 as these pagetables
++ * may not be the 'current' task's pagetables (e.g., current may be
++ * 32-bit, but the pagetables may be for a 64-bit task).
++ * Subtracting 1 from TASK_SIZE64 means the loop limit is correct
++ * regardless of whether TASK_SIZE64 is a multiple of PGDIR_SIZE.
++ */
++ for (g = 0, seq = 0; g <= ((TASK_SIZE64-1) / PGDIR_SIZE); g++, pgd++) {
++ if (pgd_none(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ if (PTRS_PER_PUD > 1) /* not folded */
++ seq = pgd_walk_set_prot(virt_to_page(pud),flags,cpu,seq);
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ if (pud_none(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ if (PTRS_PER_PMD > 1) /* not folded */
++ seq = pgd_walk_set_prot(virt_to_page(pmd),flags,cpu,seq);
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++ if (pmd_none(*pmd))
++ continue;
++ seq = pgd_walk_set_prot(pmd_page(*pmd),flags,cpu,seq);
++ }
++ }
++ }
++
++ mcl = per_cpu(pb_mcl, cpu);
++#ifdef CONFIG_X86_64
++ if (unlikely(seq > PIN_BATCH - 2)) {
++ if (unlikely(HYPERVISOR_multicall_check(mcl, seq, NULL)))
++ BUG();
++ seq = 0;
++ }
++ MULTI_update_va_mapping(mcl + seq,
++ (unsigned long)__user_pgd(pgd_base),
++ pfn_pte(virt_to_phys(__user_pgd(pgd_base))>>PAGE_SHIFT, flags),
++ 0);
++ MULTI_update_va_mapping(mcl + seq + 1,
++ (unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH);
++ if (unlikely(HYPERVISOR_multicall_check(mcl, seq + 2, NULL)))
++ BUG();
++#else
++ if (likely(seq != 0)) {
++ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
++ (unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH);
++ if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
++ seq + 1, NULL)))
++ BUG();
++ } else if(HYPERVISOR_update_va_mapping((unsigned long)pgd_base,
++ pfn_pte(virt_to_phys(pgd_base)>>PAGE_SHIFT, flags),
++ UVMF_TLB_FLUSH))
++ BUG();
++#endif
++
++ put_cpu();
++}
++
++static void __pgd_pin(pgd_t *pgd)
++{
++ pgd_walk(pgd, PAGE_KERNEL_RO);
++ kmap_flush_unused();
++ xen_pgd_pin(__pa(pgd)); /* kernel */
++#ifdef CONFIG_X86_64
++ xen_pgd_pin(__pa(__user_pgd(pgd))); /* user */
++#endif
++ SetPagePinned(virt_to_page(pgd));
++}
++
++static void __pgd_unpin(pgd_t *pgd)
++{
++ xen_pgd_unpin(__pa(pgd));
++#ifdef CONFIG_X86_64
++ xen_pgd_unpin(__pa(__user_pgd(pgd)));
++#endif
++ pgd_walk(pgd, PAGE_KERNEL);
++ ClearPagePinned(virt_to_page(pgd));
++}
++
++static void pgd_test_and_unpin(pgd_t *pgd)
++{
++ if (PagePinned(virt_to_page(pgd)))
++ __pgd_unpin(pgd);
++}
++
++void mm_pin(struct mm_struct *mm)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ pin_lock(mm);
++ __pgd_pin(mm->pgd);
++ pin_unlock(mm);
++}
++
++void mm_unpin(struct mm_struct *mm)
++{
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ pin_lock(mm);
++ __pgd_unpin(mm->pgd);
++ pin_unlock(mm);
++}
++
++void mm_pin_all(void)
++{
++ struct page *page;
++ unsigned long flags;
++
++ if (xen_feature(XENFEAT_writable_page_tables))
++ return;
++
++ /*
++ * Allow uninterrupted access to the pgd_list. Also protects
++ * __pgd_pin() by disabling preemption.
++ * All other CPUs must be at a safe point (e.g., in stop_machine
++ * or offlined entirely).
++ */
++ spin_lock_irqsave(&pgd_lock, flags);
++ list_for_each_entry(page, &pgd_list, lru) {
++ if (!PagePinned(page))
++ __pgd_pin((pgd_t *)page_address(page));
++ }
++ spin_unlock_irqrestore(&pgd_lock, flags);
++}
++
++void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
++{
++ if (!PagePinned(virt_to_page(mm->pgd)))
++ mm_pin(mm);
++}
++
++void arch_exit_mmap(struct mm_struct *mm)
++{
++ struct task_struct *tsk = current;
++
++ task_lock(tsk);
++
++ /*
++ * We aggressively remove defunct pgd from cr3. We execute unmap_vmas()
++ * *much* faster this way, as no tlb flushes means bigger wrpt batches.
++ */
++ if (tsk->active_mm == mm) {
++ tsk->active_mm = &init_mm;
++ atomic_inc(&init_mm.mm_count);
++
++ switch_mm(mm, &init_mm, tsk);
++
++ atomic_dec(&mm->mm_count);
++ BUG_ON(atomic_read(&mm->mm_count) == 0);
++ }
++
++ task_unlock(tsk);
++
++ if (PagePinned(virt_to_page(mm->pgd))
++ && atomic_read(&mm->mm_count) == 1
++ && !mm->context.has_foreign_mappings)
++ mm_unpin(mm);
++}
++
++static inline void pgd_list_add(pgd_t *pgd)
++{
++ struct page *page = virt_to_page(pgd);
++
++ list_add(&page->lru, &pgd_list);
++}
++
++static inline void pgd_list_del(pgd_t *pgd)
++{
++ struct page *page = virt_to_page(pgd);
++
++ list_del(&page->lru);
++}
++
++#define UNSHARED_PTRS_PER_PGD \
++ (SHARED_KERNEL_PMD ? KERNEL_PGD_BOUNDARY : PTRS_PER_PGD)
++
++static void pgd_ctor(void *p)
++{
++ pgd_t *pgd = p;
++ unsigned long flags;
++
++ pgd_test_and_unpin(pgd);
++
++ /* Clear usermode parts of PGD */
++ memset(pgd, 0, KERNEL_PGD_BOUNDARY*sizeof(pgd_t));
++
++ spin_lock_irqsave(&pgd_lock, flags);
++
++ /* If the pgd points to a shared pagetable level (either the
++ ptes in non-PAE, or shared PMD in PAE), then just copy the
++ references from swapper_pg_dir. */
++ if (PAGETABLE_LEVELS == 2 ||
++ (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
++ PAGETABLE_LEVELS == 4) {
++ clone_pgd_range(pgd + KERNEL_PGD_BOUNDARY,
++ swapper_pg_dir + KERNEL_PGD_BOUNDARY,
++ KERNEL_PGD_PTRS);
++ paravirt_alloc_pmd_clone(__pa(pgd) >> PAGE_SHIFT,
++ __pa(swapper_pg_dir) >> PAGE_SHIFT,
++ KERNEL_PGD_BOUNDARY,
++ KERNEL_PGD_PTRS);
++ }
++
++#ifdef CONFIG_X86_64
++ /* set level3_user_pgt for vsyscall area */
++ __user_pgd(pgd)[pgd_index(VSYSCALL_START)] =
++ __pgd(__pa_symbol(level3_user_pgt) | _PAGE_TABLE);
++#endif
++
++#ifndef CONFIG_X86_PAE
++ /* list required to sync kernel mapping updates */
++ if (!SHARED_KERNEL_PMD)
++ pgd_list_add(pgd);
++#endif
++
++ spin_unlock_irqrestore(&pgd_lock, flags);
++}
++
++static void pgd_dtor(void *pgd)
++{
++ unsigned long flags; /* can be called from interrupt context */
++
++ if (!SHARED_KERNEL_PMD) {
++ spin_lock_irqsave(&pgd_lock, flags);
++ pgd_list_del(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ }
++
++ pgd_test_and_unpin(pgd);
++}
++
++/*
++ * List of all pgd's needed for non-PAE so it can invalidate entries
++ * in both cached and uncached pgd's; not needed for PAE since the
++ * kernel pmd is shared. If PAE were not to share the pmd a similar
++ * tactic would be needed. This is essentially codepath-based locking
++ * against pageattr.c; it is the unique case in which a valid change
++ * of kernel pagetables can't be lazily synchronized by vmalloc faults.
++ * vmalloc faults work because attached pagetables are never freed.
++ * -- wli
++ */
++
++#ifdef CONFIG_X86_PAE
++/*
++ * Mop up any pmd pages which may still be attached to the pgd.
++ * Normally they will be freed by munmap/exit_mmap, but any pmd we
++ * preallocate which never got a corresponding vma will need to be
++ * freed manually.
++ */
++static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
++{
++ int i;
++
++ for(i = 0; i < UNSHARED_PTRS_PER_PGD; i++) {
++ pgd_t pgd = pgdp[i];
++
++ if (__pgd_val(pgd) != 0) {
++ pmd_t *pmd = (pmd_t *)pgd_page_vaddr(pgd);
++
++ pgdp[i] = xen_make_pgd(0);
++
++ paravirt_release_pmd(pgd_val(pgd) >> PAGE_SHIFT);
++ pmd_free(mm, pmd);
++ }
++ }
++
++ if (!xen_feature(XENFEAT_pae_pgdir_above_4gb))
++ xen_destroy_contiguous_region((unsigned long)pgdp, 0);
++}
++
++/*
++ * In PAE mode, we need to do a cr3 reload (=tlb flush) when
++ * updating the top-level pagetable entries to guarantee the
++ * processor notices the update. Since this is expensive, and
++ * all 4 top-level entries are used almost immediately in a
++ * new process's life, we just pre-populate them here.
++ *
++ * Also, if we're in a paravirt environment where the kernel pmd is
++ * not shared between pagetables (!SHARED_KERNEL_PMDS), we allocate
++ * and initialize the kernel pmds here.
++ */
++static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
++{
++ pud_t *pud;
++ pmd_t *pmds[UNSHARED_PTRS_PER_PGD];
++ unsigned long addr, flags;
++ int i;
++
++ /*
++ * We can race save/restore (if we sleep during a GFP_KERNEL memory
++ * allocation). We therefore store virtual addresses of pmds as they
++ * do not change across save/restore, and poke the machine addresses
++ * into the pgdir under the pgd_lock.
++ */
++ for (addr = i = 0; i < UNSHARED_PTRS_PER_PGD; i++, addr += PUD_SIZE) {
++ pmds[i] = pmd_alloc_one(mm, addr);
++ if (!pmds[i])
++ goto out_oom;
++ }
++
++ spin_lock_irqsave(&pgd_lock, flags);
++
++ /* Protect against save/restore: move below 4GB under pgd_lock. */
++ if (!xen_feature(XENFEAT_pae_pgdir_above_4gb)
++ && xen_create_contiguous_region((unsigned long)pgd, 0, 32)) {
++ spin_unlock_irqrestore(&pgd_lock, flags);
++out_oom:
++ while (i--)
++ pmd_free(mm, pmds[i]);
++ return 0;
++ }
++
++ /* Copy kernel pmd contents and write-protect the new pmds. */
++ pud = pud_offset(pgd, 0);
++ for (addr = i = 0; i < UNSHARED_PTRS_PER_PGD;
++ i++, pud++, addr += PUD_SIZE) {
++ if (i >= KERNEL_PGD_BOUNDARY) {
++ memcpy(pmds[i],
++ (pmd_t *)pgd_page_vaddr(swapper_pg_dir[i]),
++ sizeof(pmd_t) * PTRS_PER_PMD);
++ make_lowmem_page_readonly(
++ pmds[i], XENFEAT_writable_page_tables);
++ }
++
++ /* It is safe to poke machine addresses of pmds under the pgd_lock. */
++ pud_populate(mm, pud, pmds[i]);
++ }
++
++ /* List required to sync kernel mapping updates and
++ * to pin/unpin on save/restore. */
++ pgd_list_add(pgd);
++
++ spin_unlock_irqrestore(&pgd_lock, flags);
++
++ return 1;
++}
++
++void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd)
++{
++ struct page *page = virt_to_page(pmd);
++ unsigned long pfn = page_to_pfn(page);
++
++ paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
++
++ /* Note: almost everything apart from _PAGE_PRESENT is
++ reserved at the pmd (PDPT) level. */
++ if (PagePinned(virt_to_page(mm->pgd))) {
++ BUG_ON(PageHighMem(page));
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, PAGE_KERNEL_RO), 0));
++ set_pud(pudp, __pud(__pa(pmd) | _PAGE_PRESENT));
++ } else
++ *pudp = __pud(__pa(pmd) | _PAGE_PRESENT);
++
++ /*
++ * According to Intel App note "TLBs, Paging-Structure Caches,
++ * and Their Invalidation", April 2007, document 317080-001,
++ * section 8.1: in PAE mode we explicitly have to flush the
++ * TLB via cr3 if the top-level pgd is changed...
++ */
++ if (mm == current->active_mm)
++ xen_tlb_flush();
++}
++#else /* !CONFIG_X86_PAE */
++/* No need to prepopulate any pagetable entries in non-PAE modes. */
++static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
++{
++ return 1;
++}
++
++static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgd)
++{
++}
++#endif /* CONFIG_X86_PAE */
++
++#ifdef CONFIG_X86_64
++/* We allocate two contiguous pages for kernel and user. */
++#define PGD_ORDER 1
++#else
++#define PGD_ORDER 0
++#endif
++
++pgd_t *pgd_alloc(struct mm_struct *mm)
++{
++ pgd_t *pgd = (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
++
++ /* so that alloc_pd can use it */
++ mm->pgd = pgd;
++ if (pgd)
++ pgd_ctor(pgd);
++
++ if (pgd && !pgd_prepopulate_pmd(mm, pgd)) {
++ free_pages((unsigned long)pgd, PGD_ORDER);
++ pgd = NULL;
++ }
++
++ return pgd;
++}
++
++void pgd_free(struct mm_struct *mm, pgd_t *pgd)
++{
++ /*
++ * After this the pgd should not be pinned for the duration of this
++ * function's execution. We should never sleep and thus never race:
++ * 1. User pmds will not become write-protected under our feet due
++ * to a concurrent mm_pin_all().
++ * 2. The machine addresses in PGD entries will not become invalid
++ * due to a concurrent save/restore.
++ */
++ pgd_dtor(pgd);
++
++ pgd_mop_up_pmds(mm, pgd);
++ free_pages((unsigned long)pgd, PGD_ORDER);
++}
++
++/* blktap and gntdev need this, as otherwise they would implicitly (and
++ * needlessly, as they never use it) reference init_mm. */
++pte_t xen_ptep_get_and_clear_full(struct vm_area_struct *vma,
++ unsigned long addr, pte_t *ptep, int full)
++{
++ return ptep_get_and_clear_full(vma->vm_mm, addr, ptep, full);
++}
++EXPORT_SYMBOL_GPL(xen_ptep_get_and_clear_full);
++
++int ptep_set_access_flags(struct vm_area_struct *vma,
++ unsigned long address, pte_t *ptep,
++ pte_t entry, int dirty)
++{
++ int changed = !pte_same(*ptep, entry);
++
++ if (changed && dirty) {
++ if (likely(vma->vm_mm == current->mm)) {
++ if (HYPERVISOR_update_va_mapping(address,
++ entry,
++ (unsigned long)vma->vm_mm->cpu_vm_mask.bits|
++ UVMF_INVLPG|UVMF_MULTI))
++ BUG();
++ } else {
++ xen_l1_entry_update(ptep, entry);
++ flush_tlb_page(vma, address);
++ }
++ }
++
++ return changed;
++}
++
++int ptep_test_and_clear_young(struct vm_area_struct *vma,
++ unsigned long addr, pte_t *ptep)
++{
++ int ret = 0;
++
++ if (pte_young(*ptep))
++ ret = test_and_clear_bit(_PAGE_BIT_ACCESSED,
++ &ptep->pte);
++
++ if (ret)
++ pte_update(vma->vm_mm, addr, ptep);
++
++ return ret;
++}
++
++int ptep_clear_flush_young(struct vm_area_struct *vma,
++ unsigned long address, pte_t *ptep)
++{
++ pte_t pte = *ptep;
++ int young = pte_young(pte);
++
++ pte = pte_mkold(pte);
++ if (PagePinned(virt_to_page(vma->vm_mm->pgd)))
++ ptep_set_access_flags(vma, address, ptep, pte, young);
++ else if (young)
++ ptep->pte_low = pte.pte_low;
++
++ return young;
++}
+--- a/arch/x86/pci/i386.c
++++ b/arch/x86/pci/i386.c
+@@ -328,10 +328,14 @@ int pci_mmap_page_range(struct pci_dev *
+ flags = new_flags;
+ }
+
++#ifndef CONFIG_XEN
+ if (((vma->vm_pgoff < max_low_pfn_mapped) ||
+ (vma->vm_pgoff >= (1UL<<(32 - PAGE_SHIFT)) &&
+ vma->vm_pgoff < max_pfn_mapped)) &&
+ ioremap_change_attr((unsigned long)__va(addr), len, flags)) {
++#else
++ if (ioremap_check_change_attr(vma->vm_pgoff, len, flags)) {
++#endif
+ free_memtype(addr, addr + len);
+ return -EINVAL;
+ }
+--- a/arch/x86/pci/irq-xen.c
++++ b/arch/x86/pci/irq-xen.c
+@@ -140,9 +140,11 @@ static void __init pirq_peer_trick(void)
+ busmap[e->bus] = 1;
+ }
+ for(i = 1; i < 256; i++) {
++ int node;
+ if (!busmap[i] || pci_find_bus(0, i))
+ continue;
+- if (pci_scan_bus_with_sysdata(i))
++ node = get_mp_bus_to_node(i);
++ if (pci_scan_bus_on_node(i, &pci_root_ops, node))
+ printk(KERN_INFO "PCI: Discovered primary peer "
+ "bus %02x [IRQ]\n", i);
+ }
+@@ -204,7 +206,7 @@ static int pirq_ali_get(struct pci_dev *
+ {
+ static const unsigned char irqmap[16] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 };
+
+- WARN_ON_ONCE(pirq >= 16);
++ WARN_ON_ONCE(pirq > 16);
+ return irqmap[read_config_nybble(router, 0x48, pirq-1)];
+ }
+
+@@ -213,7 +215,7 @@ static int pirq_ali_set(struct pci_dev *
+ static const unsigned char irqmap[16] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 };
+ unsigned int val = irqmap[irq];
+
+- WARN_ON_ONCE(pirq >= 16);
++ WARN_ON_ONCE(pirq > 16);
+ if (val) {
+ write_config_nybble(router, 0x48, pirq-1, val);
+ return 1;
+@@ -264,7 +266,7 @@ static int pirq_via586_get(struct pci_de
+ {
+ static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 };
+
+- WARN_ON_ONCE(pirq >= 5);
++ WARN_ON_ONCE(pirq > 5);
+ return read_config_nybble(router, 0x55, pirqmap[pirq-1]);
+ }
+
+@@ -272,7 +274,7 @@ static int pirq_via586_set(struct pci_de
+ {
+ static const unsigned int pirqmap[5] = { 3, 2, 5, 1, 1 };
+
+- WARN_ON_ONCE(pirq >= 5);
++ WARN_ON_ONCE(pirq > 5);
+ write_config_nybble(router, 0x55, pirqmap[pirq-1], irq);
+ return 1;
+ }
+@@ -286,7 +288,7 @@ static int pirq_ite_get(struct pci_dev *
+ {
+ static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
+
+- WARN_ON_ONCE(pirq >= 4);
++ WARN_ON_ONCE(pirq > 4);
+ return read_config_nybble(router,0x43, pirqmap[pirq-1]);
+ }
+
+@@ -294,7 +296,7 @@ static int pirq_ite_set(struct pci_dev *
+ {
+ static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
+
+- WARN_ON_ONCE(pirq >= 4);
++ WARN_ON_ONCE(pirq > 4);
+ write_config_nybble(router, 0x43, pirqmap[pirq-1], irq);
+ return 1;
+ }
+@@ -623,6 +625,13 @@ static __init int via_router_probe(struc
+ */
+ device = PCI_DEVICE_ID_VIA_8235;
+ break;
++ case PCI_DEVICE_ID_VIA_8237:
++ /**
++ * Asus a7v600 bios wrongly reports 8237
++ * as 586-compatible
++ */
++ device = PCI_DEVICE_ID_VIA_8237;
++ break;
+ }
+ }
+
+--- a/arch/x86/vdso/vdso32-setup-xen.c
++++ b/arch/x86/vdso/vdso32-setup-xen.c
+@@ -164,7 +164,7 @@ static __init void relocate_vdso(Elf32_E
+ Elf32_Shdr *shdr;
+ int i;
+
+- BUG_ON(memcmp(ehdr->e_ident, ELFMAG, 4) != 0 ||
++ BUG_ON(memcmp(ehdr->e_ident, ELFMAG, SELFMAG) != 0 ||
+ !elf_check_arch_ia32(ehdr) ||
+ ehdr->e_type != ET_DYN);
+
+@@ -233,8 +233,12 @@ void syscall32_cpu_init(void)
+ BUG();
+ #endif
+
+- if (use_sysenter < 0)
+- use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL);
++ if (use_sysenter < 0) {
++ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
++ use_sysenter = 1;
++ if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR)
++ use_sysenter = 1;
++ }
+ }
+
+ #define compat_uses_vma 1
+@@ -337,8 +341,6 @@ int __init sysenter_setup(void)
+
+ #ifdef CONFIG_X86_32
+ gate_vma_init();
+-
+- printk("Compat vDSO mapped to %08lx.\n", __fix_to_virt(FIX_VDSO));
+ #endif
+
+ #if defined(CONFIG_X86_64) && CONFIG_XEN_COMPAT < 0x030200
+@@ -383,6 +385,9 @@ int arch_setup_additional_pages(struct l
+ int ret = 0;
+ bool compat;
+
++ if (vdso_enabled == VDSO_DISABLED)
++ return 0;
++
+ down_write(&mm->mmap_sem);
+
+ /* Test compat mode once here, in case someone
+--- a/drivers/acpi/processor_core.c
++++ b/drivers/acpi/processor_core.c
+@@ -657,7 +657,7 @@ static int acpi_processor_get_info(struc
+ * of /proc/cpuinfo
+ */
+ status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer);
+- if (ACPI_SUCCESS(status))
++ if (ACPI_SUCCESS(status) && pr->id != -1)
+ arch_fix_phys_package_id(pr->id, object.integer.value);
+
+ return 0;
+--- a/drivers/input/xen-kbdfront.c
++++ b/drivers/input/xen-kbdfront.c
+@@ -325,7 +325,6 @@ static struct xenbus_device_id xenkbd_id
+
+ static struct xenbus_driver xenkbd = {
+ .name = "vkbd",
+- .owner = THIS_MODULE,
+ .ids = xenkbd_ids,
+ .probe = xenkbd_probe,
+ .remove = xenkbd_remove,
+--- a/drivers/oprofile/cpu_buffer.c
++++ b/drivers/oprofile/cpu_buffer.c
+@@ -310,7 +310,7 @@ void oprofile_add_trace(unsigned long pc
+ #ifdef CONFIG_XEN
+ int oprofile_add_domain_switch(int32_t domain_id)
+ {
+- struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[smp_processor_id()];
++ struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
+
+ /* should have space for switching into and out of domain
+ (2 slots each) plus one sample and one cpu mode switch */
+--- a/drivers/pci/msi-xen.c
++++ b/drivers/pci/msi-xen.c
+@@ -588,7 +588,7 @@ int pci_enable_msi(struct pci_dev* dev)
+ EXPORT_SYMBOL(pci_enable_msi);
+
+ extern void pci_frontend_disable_msi(struct pci_dev* dev);
+-void pci_disable_msi(struct pci_dev* dev)
++void pci_msi_shutdown(struct pci_dev* dev)
+ {
+ int pirq;
+
+@@ -617,6 +617,10 @@ void pci_disable_msi(struct pci_dev* dev
+ pci_intx_for_msi(dev, 1);
+ dev->msi_enabled = 0;
+ }
++void pci_disable_msi(struct pci_dev* dev)
++{
++ pci_msi_shutdown(dev);
++}
+ EXPORT_SYMBOL(pci_disable_msi);
+
+ /**
+@@ -719,7 +723,7 @@ int pci_enable_msix(struct pci_dev* dev,
+ EXPORT_SYMBOL(pci_enable_msix);
+
+ extern void pci_frontend_disable_msix(struct pci_dev* dev);
+-void pci_disable_msix(struct pci_dev* dev)
++void pci_msix_shutdown(struct pci_dev* dev)
+ {
+ if (!pci_msi_enable)
+ return;
+@@ -756,6 +760,10 @@ void pci_disable_msix(struct pci_dev* de
+ pci_intx_for_msi(dev, 1);
+ dev->msix_enabled = 0;
+ }
++void pci_disable_msix(struct pci_dev* dev)
++{
++ pci_msix_shutdown(dev);
++}
+ EXPORT_SYMBOL(pci_disable_msix);
+
+ /**
+--- a/drivers/video/Kconfig
++++ b/drivers/video/Kconfig
+@@ -2047,7 +2047,7 @@ config FB_VIRTUAL
+
+ config XEN_FBDEV_FRONTEND
+ tristate "Xen virtual frame buffer support"
+- depends on FB && XEN
++ depends on FB && PARAVIRT_XEN
+ select FB_SYS_FILLRECT
+ select FB_SYS_COPYAREA
+ select FB_SYS_IMAGEBLIT
+--- a/drivers/video/xen-fbfront.c
++++ b/drivers/video/xen-fbfront.c
+@@ -670,7 +670,6 @@ static struct xenbus_device_id xenfb_ids
+
+ static struct xenbus_driver xenfb = {
+ .name = "vfb",
+- .owner = THIS_MODULE,
+ .ids = xenfb_ids,
+ .probe = xenfb_probe,
+ .remove = xenfb_remove,
+--- a/drivers/xen/blkfront/blkfront.c
++++ b/drivers/xen/blkfront/blkfront.c
+@@ -282,7 +282,9 @@ static void backend_changed(struct xenbu
+ break;
+
+ case XenbusStateClosing:
+- bd = bdget(info->dev);
++ if (!info->gd)
++ break;
++ bd = bdget_disk(info->gd, 0);
+ if (bd == NULL)
+ xenbus_dev_fatal(dev, -ENODEV, "bdget failed");
+
+--- a/drivers/xen/blkfront/block.h
++++ b/drivers/xen/blkfront/block.h
+@@ -96,7 +96,6 @@ struct blk_shadow {
+ struct blkfront_info
+ {
+ struct xenbus_device *xbdev;
+- dev_t dev;
+ struct gendisk *gd;
+ int vdevice;
+ blkif_vdev_t handle;
+--- a/drivers/xen/blkfront/vbd.c
++++ b/drivers/xen/blkfront/vbd.c
+@@ -246,17 +246,32 @@ xlvbd_init_blk_queue(struct gendisk *gd,
+ return 0;
+ }
+
+-static int
+-xlvbd_alloc_gendisk(int major, int minor, blkif_sector_t capacity, int vdevice,
+- u16 vdisk_info, u16 sector_size,
+- struct blkfront_info *info)
++int
++xlvbd_add(blkif_sector_t capacity, int vdevice, u16 vdisk_info,
++ u16 sector_size, struct blkfront_info *info)
+ {
++ int major, minor;
+ struct gendisk *gd;
+ struct xlbd_major_info *mi;
+ int nr_minors = 1;
+ int err = -ENODEV;
+ unsigned int offset;
+
++ if ((vdevice>>EXT_SHIFT) > 1) {
++ /* this is above the extended range; something is wrong */
++ printk(KERN_WARNING "blkfront: vdevice 0x%x is above the extended range; ignoring\n", vdevice);
++ return -ENODEV;
++ }
++
++ if (!VDEV_IS_EXTENDED(vdevice)) {
++ major = BLKIF_MAJOR(vdevice);
++ minor = BLKIF_MINOR(vdevice);
++ }
++ else {
++ major = 202;
++ minor = BLKIF_MINOR_EXT(vdevice);
++ }
++
+ BUG_ON(info->gd != NULL);
+ BUG_ON(info->mi != NULL);
+ BUG_ON(info->rq != NULL);
+@@ -337,41 +352,6 @@ xlvbd_alloc_gendisk(int major, int minor
+ return err;
+ }
+
+-int
+-xlvbd_add(blkif_sector_t capacity, int vdevice, u16 vdisk_info,
+- u16 sector_size, struct blkfront_info *info)
+-{
+- struct block_device *bd;
+- int err = 0;
+- int major, minor;
+-
+- if ((vdevice>>EXT_SHIFT) > 1) {
+- /* this is above the extended range; something is wrong */
+- printk(KERN_WARNING "blkfront: vdevice 0x%x is above the extended range; ignoring\n", vdevice);
+- return -ENODEV;
+- }
+-
+- if (!VDEV_IS_EXTENDED(vdevice)) {
+- major = BLKIF_MAJOR(vdevice);
+- minor = BLKIF_MINOR(vdevice);
+- }
+- else {
+- major = 202;
+- minor = BLKIF_MINOR_EXT(vdevice);
+- }
+-
+- info->dev = MKDEV(major, minor);
+- bd = bdget(info->dev);
+- if (bd == NULL)
+- return -ENODEV;
+-
+- err = xlvbd_alloc_gendisk(major, minor, capacity, vdevice, vdisk_info,
+- sector_size, info);
+-
+- bdput(bd);
+- return err;
+-}
+-
+ void
+ xlvbd_del(struct blkfront_info *info)
+ {
+--- a/drivers/xen/blktap/blktap.c
++++ b/drivers/xen/blktap/blktap.c
+@@ -111,6 +111,7 @@ typedef struct tap_blkif {
+ unsigned long mode; /*current switching mode */
+ int minor; /*Minor number for tapdisk device */
+ pid_t pid; /*tapdisk process id */
++ struct pid_namespace *pid_ns; /*... and its corresponding namespace */
+ enum { RUNNING, CLEANSHUTDOWN } status; /*Detect a clean userspace
+ shutdown */
+ unsigned long *idx_map; /*Record the user ring id to kern
+@@ -295,16 +296,14 @@ static inline int OFFSET_TO_SEG(int offs
+ * BLKTAP VM OPS
+ */
+
+-static struct page *blktap_nopage(struct vm_area_struct *vma,
+- unsigned long address,
+- int *type)
++static int blktap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+ {
+ /*
+ * if the page has not been mapped in by the driver then return
+- * NOPAGE_SIGBUS to the domain.
++ * VM_FAULT_SIGBUS to the domain.
+ */
+
+- return NOPAGE_SIGBUS;
++ return VM_FAULT_SIGBUS;
+ }
+
+ static pte_t blktap_clear_pte(struct vm_area_struct *vma,
+@@ -390,7 +389,7 @@ static pte_t blktap_clear_pte(struct vm_
+ }
+
+ struct vm_operations_struct blktap_vm_ops = {
+- nopage: blktap_nopage,
++ fault: blktap_fault,
+ zap_pte: blktap_clear_pte,
+ };
+
+@@ -483,9 +482,8 @@ found:
+ tapfds[minor] = info;
+
+ if ((class = get_xen_class()) != NULL)
+- class_device_create(class, NULL,
+- MKDEV(blktap_major, minor), NULL,
+- "blktap%d", minor);
++ device_create(class, NULL, MKDEV(blktap_major, minor),
++ "blktap%d", minor);
+ }
+
+ out:
+@@ -527,7 +525,7 @@ void signal_tapdisk(int idx)
+ return;
+
+ if (info->pid > 0) {
+- ptask = find_task_by_pid(info->pid);
++ ptask = find_task_by_pid_ns(info->pid, info->pid_ns);
+ if (ptask)
+ info->status = CLEANSHUTDOWN;
+ }
+@@ -773,8 +771,9 @@ static int blktap_ioctl(struct inode *in
+ {
+ if (info) {
+ info->pid = (pid_t)arg;
+- DPRINTK("blktap: pid received %d\n",
+- info->pid);
++ info->pid_ns = current->nsproxy->pid_ns;
++ DPRINTK("blktap: pid received %p:%d\n",
++ info->pid_ns, info->pid);
+ }
+ return 0;
+ }
+@@ -1687,9 +1686,7 @@ static int __init blkif_init(void)
+ * We only create the device when a request of a new device is
+ * made.
+ */
+- class_device_create(class, NULL,
+- MKDEV(blktap_major, 0), NULL,
+- "blktap0");
++ device_create(class, NULL, MKDEV(blktap_major, 0), "blktap0");
+ } else {
+ /* this is bad, but not fatal */
+ WPRINTK("blktap: sysfs xen_class not created\n");
+--- a/drivers/xen/char/mem.c
++++ b/drivers/xen/char/mem.c
+@@ -33,6 +33,27 @@ static inline int uncached_access(struct
+ return 0;
+ }
+
++static inline int range_is_allowed(unsigned long pfn, unsigned long size)
++{
++#ifdef CONFIG_NONPROMISC_DEVMEM
++ u64 from = ((u64)pfn) << PAGE_SHIFT;
++ u64 to = from + size;
++ u64 cursor = from;
++
++ while (cursor < to) {
++ if (!devmem_is_allowed(pfn)) {
++ printk(KERN_INFO
++ "Program %s tried to access /dev/mem between %Lx->%Lx.\n",
++ current->comm, from, to);
++ return 0;
++ }
++ cursor += PAGE_SIZE;
++ pfn++;
++ }
++#endif
++ return 1;
++}
++
+ /*
+ * This funcion reads the *physical* memory. The f_pos points directly to the
+ * memory location.
+@@ -55,6 +76,9 @@ static ssize_t read_mem(struct file * fi
+
+ sz = min_t(unsigned long, sz, count);
+
++ if (!range_is_allowed(p >> PAGE_SHIFT, count))
++ return -EPERM;
++
+ v = ioremap(p, sz);
+ if (IS_ERR(v) || v == NULL) {
+ /*
+@@ -103,6 +127,9 @@ static ssize_t write_mem(struct file * f
+
+ sz = min_t(unsigned long, sz, count);
+
++ if (!range_is_allowed(p >> PAGE_SHIFT, sz))
++ return -EPERM;
++
+ v = ioremap(p, sz);
+ if (v == NULL)
+ break;
+@@ -131,6 +158,23 @@ static ssize_t write_mem(struct file * f
+ }
+
+ #ifndef ARCH_HAS_DEV_MEM_MMAP_MEM
++static void mmap_mem_open(struct vm_area_struct *vma)
++{
++ map_devmem(vma->vm_pgoff, vma->vm_end - vma->vm_start,
++ vma->vm_page_prot);
++}
++
++static void mmap_mem_close(struct vm_area_struct *vma)
++{
++ unmap_devmem(vma->vm_pgoff, vma->vm_end - vma->vm_start,
++ vma->vm_page_prot);
++}
++
++static struct vm_operations_struct mmap_mem_ops = {
++ .open = mmap_mem_open,
++ .close = mmap_mem_close
++};
++
+ static int xen_mmap_mem(struct file * file, struct vm_area_struct * vma)
+ {
+ size_t size = vma->vm_end - vma->vm_start;
+@@ -138,6 +182,15 @@ static int xen_mmap_mem(struct file * fi
+ if (uncached_access(file))
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
++ if (!range_is_allowed(vma->vm_pgoff, size))
++ return -EPERM;
++
++ if (!phys_mem_access_prot_allowed(file, vma->vm_pgoff, size,
++ &vma->vm_page_prot))
++ return -EINVAL;
++
++ vma->vm_ops = &mmap_mem_ops;
++
+ /* We want to return the real error code, not EAGAIN. */
+ return direct_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+ size, vma->vm_page_prot, DOMID_IO);
+--- a/drivers/xen/console/console.c
++++ b/drivers/xen/console/console.c
+@@ -536,16 +536,18 @@ static int xencons_write(
+ return i;
+ }
+
+-static void xencons_put_char(struct tty_struct *tty, u_char ch)
++static int xencons_put_char(struct tty_struct *tty, u_char ch)
+ {
+ unsigned long flags;
++ int ret;
+
+ if (DUMMY_TTY(tty))
+- return;
++ return 0;
+
+ spin_lock_irqsave(&xencons_lock, flags);
+- (void)__xencons_put_char(ch);
++ ret = __xencons_put_char(ch);
+ spin_unlock_irqrestore(&xencons_lock, flags);
++ return ret;
+ }
+
+ static void xencons_flush_chars(struct tty_struct *tty)
+@@ -567,7 +569,7 @@ static void xencons_wait_until_sent(stru
+ if (DUMMY_TTY(tty))
+ return;
+
+- while (DRV(tty->driver)->chars_in_buffer(tty)) {
++ while (tty_chars_in_buffer(tty)) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(1);
+ if (signal_pending(current))
+@@ -616,8 +618,7 @@ static void xencons_close(struct tty_str
+
+ tty->closing = 1;
+ tty_wait_until_sent(tty, 0);
+- if (DRV(tty->driver)->flush_buffer != NULL)
+- DRV(tty->driver)->flush_buffer(tty);
++ tty_driver_flush_buffer(tty);
+ if (tty->ldisc.flush_buffer != NULL)
+ tty->ldisc.flush_buffer(tty);
+ tty->closing = 0;
+--- a/drivers/xen/core/machine_kexec.c
++++ b/drivers/xen/core/machine_kexec.c
+@@ -90,6 +90,9 @@ void __init xen_machine_kexec_setup_reso
+ xen_hypervisor_res.start = range.start;
+ xen_hypervisor_res.end = range.start + range.size - 1;
+ xen_hypervisor_res.flags = IORESOURCE_BUSY | IORESOURCE_MEM;
++#ifdef CONFIG_X86_64
++ insert_resource(&iomem_resource, &xen_hypervisor_res);
++#endif
+
+ /* fill in crashk_res if range is reserved by hypervisor */
+
+@@ -102,6 +105,9 @@ void __init xen_machine_kexec_setup_reso
+ if (range.size) {
+ crashk_res.start = range.start;
+ crashk_res.end = range.start + range.size - 1;
++#ifdef CONFIG_X86_64
++ insert_resource(&iomem_resource, &crashk_res);
++#endif
+ }
+
+ /* get physical address of vmcoreinfo */
+@@ -146,11 +152,13 @@ void __init xen_machine_kexec_setup_reso
+ return;
+ }
+
++#ifndef CONFIG_X86_64
+ void __init xen_machine_kexec_register_resources(struct resource *res)
+ {
+ request_resource(res, &xen_hypervisor_res);
+ machine_kexec_register_resources(res);
+ }
++#endif
+
+ static void setup_load_arg(xen_kexec_image_t *xki, struct kimage *image)
+ {
+--- a/drivers/xen/core/machine_reboot.c
++++ b/drivers/xen/core/machine_reboot.c
+@@ -52,6 +52,14 @@ void machine_power_off(void)
+ HYPERVISOR_shutdown(SHUTDOWN_poweroff);
+ }
+
++#ifdef CONFIG_KEXEC
++#include <asm/reboot.h>
++void machine_crash_shutdown(struct pt_regs *regs)
++{
++ native_machine_crash_shutdown(regs);
++}
++#endif
++
+ int reboot_thru_bios = 0; /* for dmi_scan.c */
+ EXPORT_SYMBOL(machine_restart);
+ EXPORT_SYMBOL(machine_halt);
+--- a/drivers/xen/core/smpboot.c
++++ b/drivers/xen/core/smpboot.c
+@@ -57,17 +57,16 @@ static DEFINE_PER_CPU(int, callfunc_irq)
+ static char resched_name[NR_CPUS][15];
+ static char callfunc_name[NR_CPUS][15];
+
+-u8 cpu_2_logical_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
++#ifdef CONFIG_X86_LOCAL_APIC
++#define set_cpu_to_apicid(cpu, apicid) (per_cpu(x86_cpu_to_apicid, cpu) = (apicid))
++#else
++#define set_cpu_to_apicid(cpu, apicid)
++#endif
+
+ DEFINE_PER_CPU(cpumask_t, cpu_sibling_map);
+ DEFINE_PER_CPU(cpumask_t, cpu_core_map);
+ EXPORT_PER_CPU_SYMBOL(cpu_core_map);
+
+-#if defined(__i386__)
+-DEFINE_PER_CPU(u8, x86_cpu_to_apicid) = BAD_APICID;
+-EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
+-#endif
+-
+ void __init prefill_possible_map(void)
+ {
+ int i, rc;
+@@ -158,7 +157,7 @@ static int __cpuinit xen_smp_intr_init(u
+ }
+
+ #ifdef CONFIG_HOTPLUG_CPU
+-static void xen_smp_intr_exit(unsigned int cpu)
++static void __cpuexit xen_smp_intr_exit(unsigned int cpu)
+ {
+ if (cpu != 0)
+ local_teardown_timer(cpu);
+@@ -267,8 +266,7 @@ void __init smp_prepare_cpus(unsigned in
+ boot_cpu_data.apicid = apicid;
+ cpu_data(0) = boot_cpu_data;
+
+- cpu_2_logical_apicid[0] = apicid;
+- per_cpu(x86_cpu_to_apicid, 0) = apicid;
++ set_cpu_to_apicid(0, apicid);
+
+ current_thread_info()->cpu = 0;
+
+@@ -323,8 +321,7 @@ void __init smp_prepare_cpus(unsigned in
+ cpu_data(cpu).cpu_index = cpu;
+ cpu_data(cpu).apicid = apicid;
+
+- cpu_2_logical_apicid[cpu] = apicid;
+- per_cpu(x86_cpu_to_apicid, cpu) = apicid;
++ set_cpu_to_apicid(cpu, apicid);
+
+ #ifdef __x86_64__
+ cpu_pda(cpu)->pcurrent = idle;
+@@ -379,7 +376,7 @@ static int __init initialize_cpu_present
+ }
+ core_initcall(initialize_cpu_present_map);
+
+-int __cpu_disable(void)
++int __cpuexit __cpu_disable(void)
+ {
+ cpumask_t map = cpu_online_map;
+ unsigned int cpu = smp_processor_id();
+@@ -396,7 +393,7 @@ int __cpu_disable(void)
+ return 0;
+ }
+
+-void __cpu_die(unsigned int cpu)
++void __cpuexit __cpu_die(unsigned int cpu)
+ {
+ while (HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL)) {
+ current->state = TASK_UNINTERRUPTIBLE;
+--- a/drivers/xen/core/xen_proc.c
++++ b/drivers/xen/core/xen_proc.c
+@@ -8,7 +8,7 @@ static struct proc_dir_entry *xen_base;
+ struct proc_dir_entry *create_xen_proc_entry(const char *name, mode_t mode)
+ {
+ if ( xen_base == NULL )
+- if ( (xen_base = proc_mkdir("xen", &proc_root)) == NULL )
++ if ( (xen_base = proc_mkdir("xen", NULL)) == NULL )
+ panic("Couldn't create /proc/xen");
+ return create_proc_entry(name, mode, xen_base);
+ }
+--- a/drivers/xen/fbfront/xenfb.c
++++ b/drivers/xen/fbfront/xenfb.c
+@@ -94,7 +94,7 @@ struct xenfb_info
+ * only mappings. The former creates unfaulted pages. Preserves
+ * invariant. The latter removes pages. Preserves invariant.
+ *
+- * 3. Holding both locks: xenfb_vm_nopage(). Extends the dirty
++ * 3. Holding both locks: xenfb_vm_fault(). Extends the dirty
+ * rectangle and updates mappings consistently. Preserves
+ * invariant.
+ *
+@@ -113,13 +113,13 @@ struct xenfb_info
+ *
+ * But FIXME: the invariant is too weak. It misses that the fault
+ * record in mappings must be consistent with the mapping of pages in
+- * the associated address space! do_no_page() updates the PTE after
+- * xenfb_vm_nopage() returns, i.e. outside the critical region. This
++ * the associated address space! __do_fault() updates the PTE after
++ * xenfb_vm_fault() returns, i.e. outside the critical region. This
+ * allows the following race:
+ *
+ * X writes to some address in the Xen frame buffer
+- * Fault - call do_no_page()
+- * call xenfb_vm_nopage()
++ * Fault - call __do_fault()
++ * call xenfb_vm_fault()
+ * grab mm_lock
+ * map->faults++;
+ * release mm_lock
+@@ -386,18 +386,17 @@ static void xenfb_vm_close(struct vm_are
+ mutex_unlock(&info->mm_lock);
+ }
+
+-static struct page *xenfb_vm_nopage(struct vm_area_struct *vma,
+- unsigned long vaddr, int *type)
++static int xenfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+ {
+ struct xenfb_mapping *map = vma->vm_private_data;
+ struct xenfb_info *info = map->info;
+- int pgnr = (vaddr - vma->vm_start) >> PAGE_SHIFT;
++ int pgnr = ((long)vmf->virtual_address - vma->vm_start) >> PAGE_SHIFT;
+ unsigned long flags;
+ struct page *page;
+ int y1, y2;
+
+ if (pgnr >= info->nr_pages)
+- return NOPAGE_SIGBUS;
++ return VM_FAULT_SIGBUS;
+
+ mutex_lock(&info->mm_lock);
+ spin_lock_irqsave(&info->dirty_lock, flags);
+@@ -413,16 +412,15 @@ static struct page *xenfb_vm_nopage(stru
+ spin_unlock_irqrestore(&info->dirty_lock, flags);
+ mutex_unlock(&info->mm_lock);
+
+- if (type)
+- *type = VM_FAULT_MINOR;
++ vmf->page = page;
+
+- return page;
++ return VM_FAULT_MINOR;
+ }
+
+ static struct vm_operations_struct xenfb_vm_ops = {
+ .open = xenfb_vm_open,
+ .close = xenfb_vm_close,
+- .nopage = xenfb_vm_nopage,
++ .fault = xenfb_vm_fault,
+ };
+
+ static int xenfb_mmap(struct fb_info *fb_info, struct vm_area_struct *vma)
+--- a/drivers/xen/gntdev/gntdev.c
++++ b/drivers/xen/gntdev/gntdev.c
+@@ -392,7 +392,7 @@ nomem_out:
+ static int __init gntdev_init(void)
+ {
+ struct class *class;
+- struct class_device *device;
++ struct device *device;
+
+ if (!is_running_on_xen()) {
+ printk(KERN_ERR "You must be running Xen to use gntdev\n");
+@@ -417,8 +417,8 @@ static int __init gntdev_init(void)
+ return 0;
+ }
+
+- device = class_device_create(class, NULL, MKDEV(gntdev_major, 0),
+- NULL, GNTDEV_NAME);
++ device = device_create(class, NULL, MKDEV(gntdev_major, 0),
++ GNTDEV_NAME);
+ if (IS_ERR(device)) {
+ printk(KERN_ERR "Error creating gntdev device in xen_class\n");
+ printk(KERN_ERR "gntdev created with major number = %d\n",
+@@ -435,7 +435,7 @@ static void __exit gntdev_exit(void)
+ {
+ struct class *class;
+ if ((class = get_xen_class()) != NULL)
+- class_device_destroy(class, MKDEV(gntdev_major, 0));
++ device_destroy(class, MKDEV(gntdev_major, 0));
+ unregister_chrdev(gntdev_major, GNTDEV_NAME);
+ }
+
+--- a/drivers/xen/Kconfig
++++ b/drivers/xen/Kconfig
+@@ -2,8 +2,6 @@
+ # This Kconfig describe xen options
+ #
+
+-mainmenu "Xen Configuration"
+-
+ config XEN
+ bool
+
+--- a/drivers/xen/Makefile
++++ b/drivers/xen/Makefile
+@@ -1,5 +1,8 @@
+-obj-$(CONFIG_PARAVIRT_XEN) += grant-table.o
++obj-$(CONFIG_PARAVIRT_XEN) += grant-table.o features.o events.o
++xen-xencomm-$(CONFIG_PARAVIRT_XEN) := xencomm.o
++xen-balloon-$(CONFIG_PARAVIRT_XEN) := balloon.o
+
++xen-balloon-$(CONFIG_XEN) := balloon/
+ obj-$(CONFIG_XEN) += core/
+ obj-$(CONFIG_XEN) += console/
+ obj-$(CONFIG_XEN) += evtchn/
+@@ -7,7 +10,8 @@ obj-y += xenbus/
+ obj-$(CONFIG_XEN) += char/
+
+ obj-$(CONFIG_XEN) += util.o
+-obj-$(CONFIG_XEN_BALLOON) += balloon/
++obj-$(CONFIG_XEN_XENCOMM) += $(xen-xencomm-y)
++obj-$(CONFIG_XEN_BALLOON) += $(xen-balloon-y)
+ obj-$(CONFIG_XEN_BLKDEV_BACKEND) += blkback/
+ obj-$(CONFIG_XEN_BLKDEV_TAP) += blktap/
+ obj-$(CONFIG_XEN_NETDEV_BACKEND) += netback/
+--- a/drivers/xen/netfront/netfront.c
++++ b/drivers/xen/netfront/netfront.c
+@@ -1464,8 +1464,7 @@ err:
+ }
+ }
+
+- while ((skb = __skb_dequeue(&errq)))
+- kfree_skb(skb);
++ __skb_queue_purge(&errq);
+
+ while ((skb = __skb_dequeue(&rxq)) != NULL) {
+ struct page *page = NETFRONT_SKB_CB(skb)->page;
+@@ -1630,8 +1629,7 @@ static void netif_release_rx_bufs_flip(s
+ }
+ }
+
+- while ((skb = __skb_dequeue(&free_list)) != NULL)
+- dev_kfree_skb(skb);
++ __skb_queue_purge(&free_list);
+
+ spin_unlock_bh(&np->rx_lock);
+ }
+--- a/drivers/xen/privcmd/privcmd.c
++++ b/drivers/xen/privcmd/privcmd.c
+@@ -261,15 +261,13 @@ static long privcmd_ioctl(struct file *f
+ }
+
+ #ifndef HAVE_ARCH_PRIVCMD_MMAP
+-static struct page *privcmd_nopage(struct vm_area_struct *vma,
+- unsigned long address,
+- int *type)
++static int privcmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+ {
+- return NOPAGE_SIGBUS;
++ return VM_FAULT_SIGBUS;
+ }
+
+ static struct vm_operations_struct privcmd_vm_ops = {
+- .nopage = privcmd_nopage
++ .fault = privcmd_fault
+ };
+
+ static int privcmd_mmap(struct file * file, struct vm_area_struct * vma)
+--- a/drivers/xen/xenbus/xenbus_client.c
++++ b/drivers/xen/xenbus/xenbus_client.c
+@@ -440,7 +440,7 @@ int xenbus_map_ring_valloc(struct xenbus
+
+ *vaddr = NULL;
+
+- area = alloc_vm_area(PAGE_SIZE);
++ area = xen_alloc_vm_area(PAGE_SIZE);
+ if (!area)
+ return -ENOMEM;
+
+@@ -450,7 +450,7 @@ int xenbus_map_ring_valloc(struct xenbus
+ BUG();
+
+ if (op.status != GNTST_okay) {
+- free_vm_area(area);
++ xen_free_vm_area(area);
+ xenbus_dev_fatal(dev, op.status,
+ "mapping in shared page %d from domain %d",
+ gnt_ref, dev->otherend_id);
+@@ -549,7 +549,7 @@ int xenbus_unmap_ring_vfree(struct xenbu
+ BUG();
+
+ if (op.status == GNTST_okay)
+- free_vm_area(area);
++ xen_free_vm_area(area);
+ else
+ xenbus_dev_error(dev, op.status,
+ "unmapping page at handle %d error %d",
+--- a/drivers/xen/xenbus/xenbus_probe.c
++++ b/drivers/xen/xenbus/xenbus_probe.c
+@@ -173,7 +173,7 @@ static int read_backend_details(struct x
+ return read_otherend_details(xendev, "backend-id", "backend");
+ }
+
+-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) && (defined(CONFIG_XEN) || defined(MODULE))
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+ static int xenbus_uevent_frontend(struct device *dev, struct kobj_uevent_env *env)
+ {
+ struct xenbus_device *xdev;
+@@ -185,8 +185,10 @@ static int xenbus_uevent_frontend(struct
+ return -ENODEV;
+
+ /* stuff we want to pass to /sbin/hotplug */
++#if defined(CONFIG_XEN) || defined(MODULE)
+ add_uevent_var(env, "XENBUS_TYPE=%s", xdev->devicetype);
+ add_uevent_var(env, "XENBUS_PATH=%s", xdev->nodename);
++#endif
+ add_uevent_var(env, "MODALIAS=xen:%s", xdev->devicetype);
+
+ return 0;
+@@ -207,10 +209,8 @@ static struct xen_bus_type xenbus_fronte
+ .probe = xenbus_dev_probe,
+ .remove = xenbus_dev_remove,
+ .shutdown = xenbus_dev_shutdown,
+-#if defined(CONFIG_XEN) || defined(MODULE)
+ .uevent = xenbus_uevent_frontend,
+ #endif
+-#endif
+ },
+ #if defined(CONFIG_XEN) || defined(MODULE)
+ .dev = {
+@@ -519,6 +519,15 @@ static ssize_t xendev_show_devtype(struc
+ }
+ DEVICE_ATTR(devtype, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_devtype, NULL);
+
++static ssize_t xendev_show_modalias(struct device *dev,
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
++ struct device_attribute *attr,
++#endif
++ char *buf)
++{
++ return sprintf(buf, "xen:%s\n", to_xenbus_device(dev)->devicetype);
++}
++DEVICE_ATTR(modalias, S_IRUSR | S_IRGRP | S_IROTH, xendev_show_modalias, NULL);
+
+ int xenbus_probe_node(struct xen_bus_type *bus,
+ const char *type,
+@@ -579,10 +588,16 @@ int xenbus_probe_node(struct xen_bus_typ
+
+ err = device_create_file(&xendev->dev, &dev_attr_devtype);
+ if (err)
+- goto fail_remove_file;
++ goto fail_remove_nodename;
++
++ err = device_create_file(&xendev->dev, &dev_attr_modalias);
++ if (err)
++ goto fail_remove_devtype;
+
+ return 0;
+-fail_remove_file:
++fail_remove_devtype:
++ device_remove_file(&xendev->dev, &dev_attr_devtype);
++fail_remove_nodename:
+ device_remove_file(&xendev->dev, &dev_attr_nodename);
+ fail_unregister:
+ device_unregister(&xendev->dev);
+--- a/fs/aio.c
++++ b/fs/aio.c
+@@ -1255,6 +1255,7 @@ static void io_destroy(struct kioctx *io
+ #ifdef CONFIG_EPOLL
+ /* forget the poll file, but it's up to the user to close it */
+ if (ioctx->file) {
++ fput(ioctx->file);
+ ioctx->file->private_data = 0;
+ ioctx->file = 0;
+ }
+@@ -1279,6 +1280,7 @@ static int aio_queue_fd_close(struct ino
+ spin_lock_irq(&ioctx->ctx_lock);
+ ioctx->file = 0;
+ spin_unlock_irq(&ioctx->ctx_lock);
++ fput(file);
+ }
+ return 0;
+ }
+@@ -1314,16 +1316,17 @@ static const struct file_operations aioq
+
+ static int make_aio_fd(struct kioctx *ioctx)
+ {
+- int error, fd;
+- struct inode *inode;
++ int fd;
+ struct file *file;
+
+- error = anon_inode_getfd(&fd, &inode, &file, "[aioq]",
+- &aioq_fops, ioctx);
+- if (error)
+- return error;
++ fd = anon_inode_getfd("[aioq]", &aioq_fops, ioctx);
++ if (fd < 0)
++ return fd;
+
+ /* associate the file with the IO context */
++ file = fget(fd);
++ if (!file)
++ return -EBADF;
+ file->private_data = ioctx;
+ ioctx->file = file;
+ init_waitqueue_head(&ioctx->poll_wait);
+--- a/include/asm-x86/dma-mapping.h
++++ b/include/asm-x86/dma-mapping.h
+@@ -223,8 +223,13 @@ static inline dma_addr_t dma_map_page(st
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(direction));
++#ifndef CONFIG_XEN
+ return ops->map_single(dev, page_to_phys(page) + offset,
+ size, direction);
++#else
++ return ops->map_single(dev, page_to_pseudophys(page) + offset,
++ size, direction);
++#endif
+ }
+
+ static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
+--- a/include/asm-x86/genapic_64.h
++++ b/include/asm-x86/genapic_64.h
+@@ -46,5 +46,6 @@ extern struct genapic apic_x2apic_phys;
+ extern int acpi_madt_oem_check(char *, char *);
+
++#ifndef CONFIG_XEN
+ enum uv_system_type {UV_NONE, UV_LEGACY_APIC, UV_X2APIC, UV_NON_UNIQUE_APIC};
+ extern enum uv_system_type get_uv_system_type(void);
+ extern int is_uv_system(void);
+@@ -55,6 +56,10 @@ DECLARE_PER_CPU(int, x2apic_extra_bits);
+ extern void uv_cpu_init(void);
+ extern void uv_system_init(void);
+ extern int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip);
++#else
++#define is_uv_system() 0
++#define uv_cpu_init() ((void)0)
++#endif
+
+ extern void setup_apic_routing(void);
+
+--- a/include/asm-x86/mach-xen/asm/desc.h
++++ b/include/asm-x86/mach-xen/asm/desc.h
+@@ -64,8 +64,8 @@ static inline struct desc_struct *get_cp
+ }
+
+ static inline void pack_gate(gate_desc *gate, unsigned char type,
+- unsigned long base, unsigned dpl, unsigned flags, unsigned short seg)
+-
++ unsigned long base, unsigned dpl, unsigned flags,
++ unsigned short seg)
+ {
+ gate->a = (seg << 16) | (base & 0xffff);
+ gate->b = (base & 0xffff0000) |
+@@ -84,22 +84,23 @@ static inline int desc_empty(const void
+ #define load_TR_desc() native_load_tr_desc()
+ #define load_gdt(dtr) native_load_gdt(dtr)
+ #define load_idt(dtr) native_load_idt(dtr)
+-#define load_tr(tr) __asm__ __volatile("ltr %0"::"m" (tr))
+-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"m" (ldt))
++#define load_tr(tr) asm volatile("ltr %0"::"m" (tr))
++#define load_ldt(ldt) asm volatile("lldt %0"::"m" (ldt))
+
+ #define store_gdt(dtr) native_store_gdt(dtr)
+ #define store_idt(dtr) native_store_idt(dtr)
+ #define store_tr(tr) (tr = native_store_tr())
+-#define store_ldt(ldt) __asm__ ("sldt %0":"=m" (ldt))
++#define store_ldt(ldt) asm("sldt %0":"=m" (ldt))
+
+ #define load_TLS(t, cpu) native_load_tls(t, cpu)
+ #define set_ldt native_set_ldt
+
+-#define write_ldt_entry(dt, entry, desc) \
+- native_write_ldt_entry(dt, entry, desc)
+-#define write_gdt_entry(dt, entry, desc, type) \
+- native_write_gdt_entry(dt, entry, desc, type)
+-#define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
++#define write_ldt_entry(dt, entry, desc) \
++ native_write_ldt_entry(dt, entry, desc)
++#define write_gdt_entry(dt, entry, desc, type) \
++ native_write_gdt_entry(dt, entry, desc, type)
++#define write_idt_entry(dt, entry, g) \
++ native_write_idt_entry(dt, entry, g)
+
+ static inline void native_write_idt_entry(gate_desc *idt, int entry,
+ const gate_desc *gate)
+@@ -138,8 +139,8 @@ static inline void pack_descriptor(struc
+ {
+ desc->a = ((base & 0xffff) << 16) | (limit & 0xffff);
+ desc->b = (base & 0xff000000) | ((base & 0xff0000) >> 16) |
+- (limit & 0x000f0000) | ((type & 0xff) << 8) |
+- ((flags & 0xf) << 20);
++ (limit & 0x000f0000) | ((type & 0xff) << 8) |
++ ((flags & 0xf) << 20);
+ desc->p = 1;
+ }
+
+@@ -160,7 +161,6 @@ static inline void set_tssldt_descriptor
+ desc->base2 = (PTR_MIDDLE(addr) >> 8) & 0xFF;
+ desc->base3 = PTR_HIGH(addr);
+ #else
+-
+ pack_descriptor((struct desc_struct *)d, addr, size, 0x80 | type, 0);
+ #endif
+ }
+@@ -178,7 +178,8 @@ static inline void __set_tss_desc(unsign
+ * last valid byte
+ */
+ set_tssldt_descriptor(&tss, (unsigned long)addr, DESC_TSS,
+- IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
++ IO_BITMAP_OFFSET + IO_BITMAP_BYTES +
++ sizeof(unsigned long) - 1);
+ write_gdt_entry(d, entry, &tss, DESC_TSS);
+ }
+
+@@ -187,16 +188,16 @@ static inline void __set_tss_desc(unsign
+ static inline void native_set_ldt(const void *addr, unsigned int entries)
+ {
+ if (likely(entries == 0))
+- __asm__ __volatile__("lldt %w0"::"q" (0));
++ asm volatile("lldt %w0"::"q" (0));
+ else {
+ unsigned cpu = smp_processor_id();
+ ldt_desc ldt;
+
+- set_tssldt_descriptor(&ldt, (unsigned long)addr,
+- DESC_LDT, entries * sizeof(ldt) - 1);
++ set_tssldt_descriptor(&ldt, (unsigned long)addr, DESC_LDT,
++ entries * LDT_ENTRY_SIZE - 1);
+ write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
+ &ldt, DESC_LDT);
+- __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
++ asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
+ }
+ }
+
+@@ -261,15 +262,15 @@ static inline void xen_load_tls(struct t
+ }
+ #endif
+
+-#define _LDT_empty(info) (\
+- (info)->base_addr == 0 && \
+- (info)->limit == 0 && \
+- (info)->contents == 0 && \
+- (info)->read_exec_only == 1 && \
+- (info)->seg_32bit == 0 && \
+- (info)->limit_in_pages == 0 && \
+- (info)->seg_not_present == 1 && \
+- (info)->useable == 0)
++#define _LDT_empty(info) \
++ ((info)->base_addr == 0 && \
++ (info)->limit == 0 && \
++ (info)->contents == 0 && \
++ (info)->read_exec_only == 1 && \
++ (info)->seg_32bit == 0 && \
++ (info)->limit_in_pages == 0 && \
++ (info)->seg_not_present == 1 && \
++ (info)->useable == 0)
+
+ #ifdef CONFIG_X86_64
+ #define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
+@@ -309,7 +310,7 @@ static inline unsigned long get_desc_lim
+
+ #ifndef CONFIG_X86_NO_IDT
+ static inline void _set_gate(int gate, unsigned type, void *addr,
+- unsigned dpl, unsigned ist, unsigned seg)
++ unsigned dpl, unsigned ist, unsigned seg)
+ {
+ gate_desc s;
+ pack_gate(&s, type, (unsigned long)addr, dpl, ist, seg);
+@@ -393,10 +394,10 @@ static inline void set_system_gate_ist(i
+ * Will read the base address of GDT_ENTRY_ESPFIX_SS and put it into %eax.
+ */
+ #define GET_DESC_BASE(idx, gdt, base, lo_w, lo_b, hi_b) \
+- movb idx*8+4(gdt), lo_b; \
+- movb idx*8+7(gdt), hi_b; \
+- shll $16, base; \
+- movw idx*8+2(gdt), lo_w;
++ movb idx * 8 + 4(gdt), lo_b; \
++ movb idx * 8 + 7(gdt), hi_b; \
++ shll $16, base; \
++ movw idx * 8 + 2(gdt), lo_w;
+
+
+ #endif /* __ASSEMBLY__ */
+--- a/include/asm-x86/mach-xen/asm/dma-mapping_32.h
++++ /dev/null
+@@ -1,141 +0,0 @@
+-#ifndef _ASM_I386_DMA_MAPPING_H
+-#define _ASM_I386_DMA_MAPPING_H
+-
+-/*
+- * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
+- * documentation.
+- */
+-
+-#include <linux/mm.h>
+-#include <linux/scatterlist.h>
+-#include <asm/cache.h>
+-#include <asm/io.h>
+-#include <asm/swiotlb.h>
+-
+-static inline int
+-address_needs_mapping(struct device *hwdev, dma_addr_t addr)
+-{
+- dma_addr_t mask = 0xffffffff;
+- /* If the device has a mask, use it, otherwise default to 32 bits */
+- if (hwdev && hwdev->dma_mask)
+- mask = *hwdev->dma_mask;
+- return (addr & ~mask) != 0;
+-}
+-
+-extern int range_straddles_page_boundary(paddr_t p, size_t size);
+-
+-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+-
+-void *dma_alloc_coherent(struct device *dev, size_t size,
+- dma_addr_t *dma_handle, gfp_t flag);
+-
+-void dma_free_coherent(struct device *dev, size_t size,
+- void *vaddr, dma_addr_t dma_handle);
+-
+-extern dma_addr_t
+-dma_map_single(struct device *dev, void *ptr, size_t size,
+- enum dma_data_direction direction);
+-
+-extern void
+-dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+- enum dma_data_direction direction);
+-
+-extern int dma_map_sg(struct device *hwdev, struct scatterlist *sg,
+- int nents, enum dma_data_direction direction);
+-extern void dma_unmap_sg(struct device *hwdev, struct scatterlist *sg,
+- int nents, enum dma_data_direction direction);
+-
+-#ifdef CONFIG_HIGHMEM
+-extern dma_addr_t
+-dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+- size_t size, enum dma_data_direction direction);
+-
+-extern void
+-dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+- enum dma_data_direction direction);
+-#else
+-#define dma_map_page(dev, page, offset, size, dir) \
+- dma_map_single(dev, page_address(page) + (offset), (size), (dir))
+-#define dma_unmap_page dma_unmap_single
+-#endif
+-
+-extern void
+-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+- enum dma_data_direction direction);
+-
+-extern void
+-dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
+- enum dma_data_direction direction);
+-
+-static inline void
+-dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size,
+- enum dma_data_direction direction)
+-{
+- dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
+-}
+-
+-static inline void
+-dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size,
+- enum dma_data_direction direction)
+-{
+- dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
+-}
+-
+-extern void
+-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction);
+-
+-extern void
+-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction);
+-
+-extern int
+-dma_mapping_error(dma_addr_t dma_addr);
+-
+-extern int
+-dma_supported(struct device *dev, u64 mask);
+-
+-static inline int
+-dma_set_mask(struct device *dev, u64 mask)
+-{
+- if(!dev->dma_mask || !dma_supported(dev, mask))
+- return -EIO;
+-
+- *dev->dma_mask = mask;
+-
+- return 0;
+-}
+-
+-static inline int
+-dma_get_cache_alignment(void)
+-{
+- /* no easy way to get cache size on all x86, so return the
+- * maximum possible, to be safe */
+- return (1 << INTERNODE_CACHE_SHIFT);
+-}
+-
+-#define dma_is_consistent(d, h) (1)
+-
+-static inline void
+-dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+- enum dma_data_direction direction)
+-{
+- flush_write_buffers();
+-}
+-
+-#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+-extern int
+-dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+- dma_addr_t device_addr, size_t size, int flags);
+-
+-extern void
+-dma_release_declared_memory(struct device *dev);
+-
+-extern void *
+-dma_mark_declared_memory_occupied(struct device *dev,
+- dma_addr_t device_addr, size_t size);
+-
+-#endif
+--- a/include/asm-x86/mach-xen/asm/dma-mapping_64.h
++++ /dev/null
+@@ -1,205 +0,0 @@
+-#ifndef _X8664_DMA_MAPPING_H
+-#define _X8664_DMA_MAPPING_H 1
+-
+-/*
+- * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
+- * documentation.
+- */
+-
+-#include <linux/scatterlist.h>
+-#include <asm/io.h>
+-
+-struct dma_mapping_ops {
+- int (*mapping_error)(dma_addr_t dma_addr);
+- void* (*alloc_coherent)(struct device *dev, size_t size,
+- dma_addr_t *dma_handle, gfp_t gfp);
+- void (*free_coherent)(struct device *dev, size_t size,
+- void *vaddr, dma_addr_t dma_handle);
+- dma_addr_t (*map_single)(struct device *hwdev, void *ptr,
+- size_t size, int direction);
+- /* like map_single, but doesn't check the device mask */
+- dma_addr_t (*map_simple)(struct device *hwdev, char *ptr,
+- size_t size, int direction);
+- void (*unmap_single)(struct device *dev, dma_addr_t addr,
+- size_t size, int direction);
+- void (*sync_single_for_cpu)(struct device *hwdev,
+- dma_addr_t dma_handle, size_t size,
+- int direction);
+- void (*sync_single_for_device)(struct device *hwdev,
+- dma_addr_t dma_handle, size_t size,
+- int direction);
+- void (*sync_single_range_for_cpu)(struct device *hwdev,
+- dma_addr_t dma_handle, unsigned long offset,
+- size_t size, int direction);
+- void (*sync_single_range_for_device)(struct device *hwdev,
+- dma_addr_t dma_handle, unsigned long offset,
+- size_t size, int direction);
+- void (*sync_sg_for_cpu)(struct device *hwdev,
+- struct scatterlist *sg, int nelems,
+- int direction);
+- void (*sync_sg_for_device)(struct device *hwdev,
+- struct scatterlist *sg, int nelems,
+- int direction);
+- int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
+- int nents, int direction);
+- void (*unmap_sg)(struct device *hwdev,
+- struct scatterlist *sg, int nents,
+- int direction);
+- int (*dma_supported)(struct device *hwdev, u64 mask);
+- int is_phys;
+-};
+-
+-extern dma_addr_t bad_dma_address;
+-extern const struct dma_mapping_ops* dma_ops;
+-extern int iommu_merge;
+-
+-#if 0
+-static inline int dma_mapping_error(dma_addr_t dma_addr)
+-{
+- if (dma_ops->mapping_error)
+- return dma_ops->mapping_error(dma_addr);
+-
+- return (dma_addr == bad_dma_address);
+-}
+-
+-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+-
+-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+-
+-extern void *dma_alloc_coherent(struct device *dev, size_t size,
+- dma_addr_t *dma_handle, gfp_t gfp);
+-extern void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle);
+-
+-static inline dma_addr_t
+-dma_map_single(struct device *hwdev, void *ptr, size_t size,
+- int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- return dma_ops->map_single(hwdev, ptr, size, direction);
+-}
+-
+-static inline void
+-dma_unmap_single(struct device *dev, dma_addr_t addr,size_t size,
+- int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- dma_ops->unmap_single(dev, addr, size, direction);
+-}
+-
+-#define dma_map_page(dev,page,offset,size,dir) \
+- dma_map_single((dev), page_address(page)+(offset), (size), (dir))
+-
+-#define dma_unmap_page dma_unmap_single
+-
+-static inline void
+-dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
+- size_t size, int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- if (dma_ops->sync_single_for_cpu)
+- dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
+- direction);
+- flush_write_buffers();
+-}
+-
+-static inline void
+-dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
+- size_t size, int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- if (dma_ops->sync_single_for_device)
+- dma_ops->sync_single_for_device(hwdev, dma_handle, size,
+- direction);
+- flush_write_buffers();
+-}
+-
+-static inline void
+-dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size, int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- if (dma_ops->sync_single_range_for_cpu) {
+- dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, size, direction);
+- }
+-
+- flush_write_buffers();
+-}
+-
+-static inline void
+-dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size, int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- if (dma_ops->sync_single_range_for_device)
+- dma_ops->sync_single_range_for_device(hwdev, dma_handle,
+- offset, size, direction);
+-
+- flush_write_buffers();
+-}
+-
+-static inline void
+-dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
+- int nelems, int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- if (dma_ops->sync_sg_for_cpu)
+- dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
+- flush_write_buffers();
+-}
+-
+-static inline void
+-dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
+- int nelems, int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- if (dma_ops->sync_sg_for_device) {
+- dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction);
+- }
+-
+- flush_write_buffers();
+-}
+-
+-static inline int
+-dma_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- return dma_ops->map_sg(hwdev, sg, nents, direction);
+-}
+-
+-static inline void
+-dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
+- int direction)
+-{
+- BUG_ON(!valid_dma_direction(direction));
+- dma_ops->unmap_sg(hwdev, sg, nents, direction);
+-}
+-
+-extern int dma_supported(struct device *hwdev, u64 mask);
+-
+-/* same for gart, swiotlb, and nommu */
+-static inline int dma_get_cache_alignment(void)
+-{
+- return boot_cpu_data.x86_clflush_size;
+-}
+-
+-#define dma_is_consistent(d, h) 1
+-
+-extern int dma_set_mask(struct device *dev, u64 mask);
+-
+-static inline void
+-dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+- enum dma_data_direction dir)
+-{
+- flush_write_buffers();
+-}
+-
+-extern struct device fallback_dev;
+-extern int panic_on_overflow;
+-#endif
+-
+-#endif /* _X8664_DMA_MAPPING_H */
+-
+-#include "dma-mapping_32.h"
+--- a/include/asm-x86/mach-xen/asm/dma-mapping.h
++++ b/include/asm-x86/mach-xen/asm/dma-mapping.h
+@@ -1,5 +1,17 @@
+-#ifdef CONFIG_X86_32
+-# include "dma-mapping_32.h"
+-#else
+-# include "dma-mapping_64.h"
+-#endif
++#ifndef _ASM_DMA_MAPPING_H_
++
++#include "../../dma-mapping.h"
++
++static inline int
++address_needs_mapping(struct device *hwdev, dma_addr_t addr)
++{
++ dma_addr_t mask = 0xffffffff;
++ /* If the device has a mask, use it, otherwise default to 32 bits */
++ if (hwdev && hwdev->dma_mask)
++ mask = *hwdev->dma_mask;
++ return (addr & ~mask) != 0;
++}
++
++extern int range_straddles_page_boundary(paddr_t p, size_t size);
++
++#endif /* _ASM_DMA_MAPPING_H_ */
+--- a/include/asm-x86/mach-xen/asm/fixmap_32.h
++++ b/include/asm-x86/mach-xen/asm/fixmap_32.h
+@@ -10,8 +10,8 @@
+ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
+ */
+
+-#ifndef _ASM_FIXMAP_H
+-#define _ASM_FIXMAP_H
++#ifndef _ASM_FIXMAP_32_H
++#define _ASM_FIXMAP_32_H
+
+ /* used by vmalloc.c, vsyscall.lds.S.
+ *
+@@ -102,8 +102,7 @@ enum fixed_addresses {
+ */
+ #define NR_FIX_BTMAPS 64
+ #define FIX_BTMAPS_NESTING 4
+- FIX_BTMAP_END =
+- __end_of_permanent_fixed_addresses + 512 -
++ FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -
+ (__end_of_permanent_fixed_addresses & 511),
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+ FIX_WP_TEST,
+@@ -114,19 +113,16 @@ enum fixed_addresses {
+ };
+
+ extern void __set_fixmap(enum fixed_addresses idx,
+- maddr_t phys, pgprot_t flags);
++ maddr_t phys, pgprot_t flags);
+ extern void reserve_top_address(unsigned long reserve);
+
+-#define set_fixmap(idx, phys) \
+- __set_fixmap(idx, phys, PAGE_KERNEL)
++#define set_fixmap(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL)
+ /*
+ * Some hardware wants to get fixmapped without caching.
+ */
+-#define set_fixmap_nocache(idx, phys) \
+- __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+-
+-#define clear_fixmap(idx) \
+- __set_fixmap(idx, 0, __pgprot(0))
++#define set_fixmap_nocache(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+
+ #define FIXADDR_TOP ((unsigned long)__FIXADDR_TOP)
+
+@@ -159,7 +155,7 @@ static __always_inline unsigned long fix
+ if (idx >= __end_of_fixed_addresses)
+ __this_fixmap_does_not_exist();
+
+- return __fix_to_virt(idx);
++ return __fix_to_virt(idx);
+ }
+
+ static inline unsigned long virt_to_fix(const unsigned long vaddr)
+--- a/include/asm-x86/mach-xen/asm/fixmap_64.h
++++ b/include/asm-x86/mach-xen/asm/fixmap_64.h
+@@ -8,8 +8,8 @@
+ * Copyright (C) 1998 Ingo Molnar
+ */
+
+-#ifndef _ASM_FIXMAP_H
+-#define _ASM_FIXMAP_H
++#ifndef _ASM_FIXMAP_64_H
++#define _ASM_FIXMAP_64_H
+
+ #include <linux/kernel.h>
+ #include <asm/apicdef.h>
+@@ -35,7 +35,8 @@
+
+ enum fixed_addresses {
+ VSYSCALL_LAST_PAGE,
+- VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE + ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1,
++ VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE
++ + ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1,
+ VSYSCALL_HPET,
+ FIX_DBGP_BASE,
+ FIX_EARLYCON_MEM_BASE,
+@@ -45,11 +46,12 @@ enum fixed_addresses {
+ #endif
+ #ifndef CONFIG_XEN
+ FIX_IO_APIC_BASE_0,
+- FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
++ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS - 1,
+ #endif
+ #ifdef CONFIG_EFI
+ FIX_EFI_IO_MAP_LAST_PAGE,
+- FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE+MAX_EFI_IO_PAGES-1,
++ FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE
++ + MAX_EFI_IO_PAGES - 1,
+ #endif
+ #ifdef CONFIG_ACPI
+ FIX_ACPI_BEGIN,
+@@ -79,19 +81,16 @@ enum fixed_addresses {
+ __end_of_fixed_addresses
+ };
+
+-extern void __set_fixmap (enum fixed_addresses idx,
+- unsigned long phys, pgprot_t flags);
++extern void __set_fixmap(enum fixed_addresses idx,
++ unsigned long phys, pgprot_t flags);
+
+-#define set_fixmap(idx, phys) \
+- __set_fixmap(idx, phys, PAGE_KERNEL)
++#define set_fixmap(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL)
+ /*
+ * Some hardware wants to get fixmapped without caching.
+ */
+-#define set_fixmap_nocache(idx, phys) \
+- __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+-
+-#define clear_fixmap(idx) \
+- __set_fixmap(idx, 0, __pgprot(0))
++#define set_fixmap_nocache(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+
+ #define FIXADDR_TOP (VSYSCALL_END-PAGE_SIZE)
+ #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
+--- a/include/asm-x86/mach-xen/asm/fixmap.h
++++ b/include/asm-x86/mach-xen/asm/fixmap.h
+@@ -1,5 +1,13 @@
++#ifndef _ASM_FIXMAP_H
++#define _ASM_FIXMAP_H
++
+ #ifdef CONFIG_X86_32
+ # include "fixmap_32.h"
+ #else
+ # include "fixmap_64.h"
+ #endif
++
++#define clear_fixmap(idx) \
++ __set_fixmap(idx, 0, __pgprot(0))
++
++#endif
+--- a/include/asm-x86/mach-xen/asm/highmem.h
++++ b/include/asm-x86/mach-xen/asm/highmem.h
+@@ -8,7 +8,7 @@
+ * Gerhard.Wichert@pdb.siemens.de
+ *
+ *
+- * Redesigned the x86 32-bit VM architecture to deal with
++ * Redesigned the x86 32-bit VM architecture to deal with
+ * up to 16 Terabyte physical memory. With current x86 CPUs
+ * we now support up to 64 Gigabytes physical RAM.
+ *
+--- a/include/asm-x86/mach-xen/asm/io_32.h
++++ b/include/asm-x86/mach-xen/asm/io_32.h
+@@ -50,12 +50,6 @@
+ #include <asm/fixmap.h>
+
+ /*
+- * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+- * access
+- */
+-#define xlate_dev_mem_ptr(p) __va(p)
+-
+-/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+ #define xlate_dev_kmem_ptr(p) p
+@@ -66,14 +60,14 @@
+ *
+ * The returned physical address is the physical (CPU) mapping for
+ * the memory address given. It is only valid to use this function on
+- * addresses directly mapped or allocated via kmalloc.
++ * addresses directly mapped or allocated via kmalloc.
+ *
+ * This function does not give bus mappings for DMA transfers. In
+ * almost all conceivable cases a device driver should not be using
+ * this function
+ */
+-
+-static inline unsigned long virt_to_phys(volatile void * address)
++
++static inline unsigned long virt_to_phys(volatile void *address)
+ {
+ return __pa(address);
+ }
+@@ -91,7 +85,7 @@ static inline unsigned long virt_to_phys
+ * this function
+ */
+
+-static inline void * phys_to_virt(unsigned long address)
++static inline void *phys_to_virt(unsigned long address)
+ {
+ return __va(address);
+ }
+@@ -152,11 +146,6 @@ extern void *early_ioremap(unsigned long
+ extern void early_iounmap(void *addr, unsigned long size);
+ extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
+
+-/* Use early IO mappings for DMI because it's initialized early */
+-#define dmi_ioremap early_ioremap
+-#define dmi_iounmap early_iounmap
+-#define dmi_alloc alloc_bootmem
+-
+ /*
+ * ISA I/O bus memory addresses are 1:1 with the physical address.
+ */
+@@ -182,16 +171,19 @@ extern void __iomem *fix_ioremap(unsigne
+
+ static inline unsigned char readb(const volatile void __iomem *addr)
+ {
+- return *(volatile unsigned char __force *) addr;
++ return *(volatile unsigned char __force *)addr;
+ }
++
+ static inline unsigned short readw(const volatile void __iomem *addr)
+ {
+- return *(volatile unsigned short __force *) addr;
++ return *(volatile unsigned short __force *)addr;
+ }
++
+ static inline unsigned int readl(const volatile void __iomem *addr)
+ {
+ return *(volatile unsigned int __force *) addr;
+ }
++
+ #define readb_relaxed(addr) readb(addr)
+ #define readw_relaxed(addr) readw(addr)
+ #define readl_relaxed(addr) readl(addr)
+@@ -201,15 +193,17 @@ static inline unsigned int readl(const v
+
+ static inline void writeb(unsigned char b, volatile void __iomem *addr)
+ {
+- *(volatile unsigned char __force *) addr = b;
++ *(volatile unsigned char __force *)addr = b;
+ }
++
+ static inline void writew(unsigned short b, volatile void __iomem *addr)
+ {
+- *(volatile unsigned short __force *) addr = b;
++ *(volatile unsigned short __force *)addr = b;
+ }
++
+ static inline void writel(unsigned int b, volatile void __iomem *addr)
+ {
+- *(volatile unsigned int __force *) addr = b;
++ *(volatile unsigned int __force *)addr = b;
+ }
+ #define __raw_writeb writeb
+ #define __raw_writew writew
+@@ -252,12 +246,12 @@ memcpy_toio(volatile void __iomem *dst,
+ * 1. Out of order aware processors
+ * 2. Accidentally out of order processors (PPro errata #51)
+ */
+-
++
+ #if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
+
+ static inline void flush_write_buffers(void)
+ {
+- __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory");
++ asm volatile("lock; addl $0,0(%%esp)": : :"memory");
+ }
+
+ #else
+@@ -274,7 +268,8 @@ extern void xen_io_delay(void);
+ extern int io_delay_type;
+ extern void io_delay_init(void);
+
+-static inline void slow_down_io(void) {
++static inline void slow_down_io(void)
++{
+ native_io_delay();
+ #ifdef REALLY_SLOW_IO
+ native_io_delay();
+@@ -283,52 +278,75 @@ static inline void slow_down_io(void) {
+ #endif
+ }
+
+-#define __BUILDIO(bwl,bw,type) \
+-static inline void out##bwl(unsigned type value, int port) { \
+- out##bwl##_local(value, port); \
+-} \
+-static inline unsigned type in##bwl(int port) { \
+- return in##bwl##_local(port); \
+-}
+-
+-#define BUILDIO(bwl,bw,type) \
+-static inline void out##bwl##_local(unsigned type value, int port) { \
+- __asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)); \
+-} \
+-static inline unsigned type in##bwl##_local(int port) { \
+- unsigned type value; \
+- __asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)); \
+- return value; \
+-} \
+-static inline void out##bwl##_local_p(unsigned type value, int port) { \
+- out##bwl##_local(value, port); \
+- slow_down_io(); \
+-} \
+-static inline unsigned type in##bwl##_local_p(int port) { \
+- unsigned type value = in##bwl##_local(port); \
+- slow_down_io(); \
+- return value; \
+-} \
+-__BUILDIO(bwl,bw,type) \
+-static inline void out##bwl##_p(unsigned type value, int port) { \
+- out##bwl(value, port); \
+- slow_down_io(); \
+-} \
+-static inline unsigned type in##bwl##_p(int port) { \
+- unsigned type value = in##bwl(port); \
+- slow_down_io(); \
+- return value; \
+-} \
+-static inline void outs##bwl(int port, const void *addr, unsigned long count) { \
+- __asm__ __volatile__("rep; outs" #bwl : "+S"(addr), "+c"(count) : "d"(port)); \
+-} \
+-static inline void ins##bwl(int port, void *addr, unsigned long count) { \
+- __asm__ __volatile__("rep; ins" #bwl : "+D"(addr), "+c"(count) : "d"(port)); \
+-}
+-
+-BUILDIO(b,b,char)
+-BUILDIO(w,w,short)
+-BUILDIO(l,,int)
++#define __BUILDIO(bwl, bw, type) \
++static inline void out##bwl(unsigned type value, int port) \
++{ \
++ out##bwl##_local(value, port); \
++} \
++ \
++static inline unsigned type in##bwl(int port) \
++{ \
++ return in##bwl##_local(port); \
++}
++
++#define BUILDIO(bwl, bw, type) \
++static inline void out##bwl##_local(unsigned type value, int port) \
++{ \
++ asm volatile("out" #bwl " %" #bw "0, %w1" \
++ : : "a"(value), "Nd"(port)); \
++} \
++ \
++static inline unsigned type in##bwl##_local(int port) \
++{ \
++ unsigned type value; \
++ asm volatile("in" #bwl " %w1, %" #bw "0" \
++ : "=a"(value) : "Nd"(port)); \
++ return value; \
++} \
++ \
++static inline void out##bwl##_local_p(unsigned type value, int port) \
++{ \
++ out##bwl##_local(value, port); \
++ slow_down_io(); \
++} \
++ \
++static inline unsigned type in##bwl##_local_p(int port) \
++{ \
++ unsigned type value = in##bwl##_local(port); \
++ slow_down_io(); \
++ return value; \
++} \
++ \
++__BUILDIO(bwl, bw, type) \
++ \
++static inline void out##bwl##_p(unsigned type value, int port) \
++{ \
++ out##bwl(value, port); \
++ slow_down_io(); \
++} \
++ \
++static inline unsigned type in##bwl##_p(int port) \
++{ \
++ unsigned type value = in##bwl(port); \
++ slow_down_io(); \
++ return value; \
++} \
++ \
++static inline void outs##bwl(int port, const void *addr, unsigned long count) \
++{ \
++ asm volatile("rep; outs" #bwl \
++ : "+S"(addr), "+c"(count) : "d"(port)); \
++} \
++ \
++static inline void ins##bwl(int port, void *addr, unsigned long count) \
++{ \
++ asm volatile("rep; ins" #bwl \
++ : "+D"(addr), "+c"(count) : "d"(port)); \
++}
++
++BUILDIO(b, b, char)
++BUILDIO(w, w, short)
++BUILDIO(l, , int)
+
+ /* We will be supplying our own /dev/mem implementation */
+ #define ARCH_HAS_DEV_MEM
+--- a/include/asm-x86/mach-xen/asm/io_64.h
++++ b/include/asm-x86/mach-xen/asm/io_64.h
+@@ -55,60 +55,75 @@ static inline void slow_down_io(void)
+ /*
+ * Talk about misusing macros..
+ */
+-#define __OUT1(s,x) \
++#define __OUT1(s, x) \
+ static inline void out##s(unsigned x value, unsigned short port) {
+
+-#define __OUT2(s,s1,s2) \
+-__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
++#define __OUT2(s, s1, s2) \
++asm volatile ("out" #s " %" s1 "0,%" s2 "1"
+
+ #ifndef REALLY_SLOW_IO
+ #define REALLY_SLOW_IO
+ #define UNSET_REALLY_SLOW_IO
+ #endif
+
+-#define __OUT(s,s1,x) \
+-__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
+-__OUT1(s##_p, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
+- slow_down_io(); }
+-
+-#define __IN1(s) \
+-static inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
+-
+-#define __IN2(s,s1,s2) \
+-__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
+-
+-#define __IN(s,s1,i...) \
+-__IN1(s) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); return _v; } \
+-__IN1(s##_p) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
+- slow_down_io(); return _v; }
++#define __OUT(s, s1, x) \
++ __OUT1(s, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
++ } \
++ __OUT1(s##_p, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
++ slow_down_io(); \
++}
++
++#define __IN1(s) \
++static inline RETURN_TYPE in##s(unsigned short port) \
++{ \
++ RETURN_TYPE _v;
++
++#define __IN2(s, s1, s2) \
++ asm volatile ("in" #s " %" s2 "1,%" s1 "0"
++
++#define __IN(s, s1, i...) \
++ __IN1(s) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
++ return _v; \
++ } \
++ __IN1(s##_p) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
++ slow_down_io(); \
++ return _v; }
+
+ #ifdef UNSET_REALLY_SLOW_IO
+ #undef REALLY_SLOW_IO
+ #endif
+
+-#define __INS(s) \
+-static inline void ins##s(unsigned short port, void * addr, unsigned long count) \
+-{ __asm__ __volatile__ ("rep ; ins" #s \
+-: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
+-
+-#define __OUTS(s) \
+-static inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
+-{ __asm__ __volatile__ ("rep ; outs" #s \
+-: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
++#define __INS(s) \
++static inline void ins##s(unsigned short port, void *addr, \
++ unsigned long count) \
++{ \
++ asm volatile ("rep ; ins" #s \
++ : "=D" (addr), "=c" (count) \
++ : "d" (port), "0" (addr), "1" (count)); \
++}
++
++#define __OUTS(s) \
++static inline void outs##s(unsigned short port, const void *addr, \
++ unsigned long count) \
++{ \
++ asm volatile ("rep ; outs" #s \
++ : "=S" (addr), "=c" (count) \
++ : "d" (port), "0" (addr), "1" (count)); \
++}
+
+ #define RETURN_TYPE unsigned char
+-__IN(b,"")
++__IN(b, "")
+ #undef RETURN_TYPE
+ #define RETURN_TYPE unsigned short
+-__IN(w,"")
++__IN(w, "")
+ #undef RETURN_TYPE
+ #define RETURN_TYPE unsigned int
+-__IN(l,"")
++__IN(l, "")
+ #undef RETURN_TYPE
+
+-__OUT(b,"b",char)
+-__OUT(w,"w",short)
+-__OUT(l,,int)
++__OUT(b, "b", char)
++__OUT(w, "w", short)
++__OUT(l, , int)
+
+ __INS(b)
+ __INS(w)
+@@ -129,12 +144,12 @@ __OUTS(l)
+ * Change virtual addresses to physical addresses and vv.
+ * These are pretty trivial
+ */
+-static inline unsigned long virt_to_phys(volatile void * address)
++static inline unsigned long virt_to_phys(volatile void *address)
+ {
+ return __pa(address);
+ }
+
+-static inline void * phys_to_virt(unsigned long address)
++static inline void *phys_to_virt(unsigned long address)
+ {
+ return __va(address);
+ }
+@@ -216,18 +231,22 @@ static inline __u8 __readb(const volatil
+ {
+ return *(__force volatile __u8 *)addr;
+ }
++
+ static inline __u16 __readw(const volatile void __iomem *addr)
+ {
+ return *(__force volatile __u16 *)addr;
+ }
++
+ static __always_inline __u32 __readl(const volatile void __iomem *addr)
+ {
+ return *(__force volatile __u32 *)addr;
+ }
++
+ static inline __u64 __readq(const volatile void __iomem *addr)
+ {
+ return *(__force volatile __u64 *)addr;
+ }
++
+ #define readb(x) __readb(x)
+ #define readw(x) __readw(x)
+ #define readl(x) __readl(x)
+@@ -247,37 +266,44 @@ static inline void __writel(__u32 b, vol
+ {
+ *(__force volatile __u32 *)addr = b;
+ }
++
+ static inline void __writeq(__u64 b, volatile void __iomem *addr)
+ {
+ *(__force volatile __u64 *)addr = b;
+ }
++
+ static inline void __writeb(__u8 b, volatile void __iomem *addr)
+ {
+ *(__force volatile __u8 *)addr = b;
+ }
++
+ static inline void __writew(__u16 b, volatile void __iomem *addr)
+ {
+ *(__force volatile __u16 *)addr = b;
+ }
+-#define writeq(val,addr) __writeq((val),(addr))
+-#define writel(val,addr) __writel((val),(addr))
+-#define writew(val,addr) __writew((val),(addr))
+-#define writeb(val,addr) __writeb((val),(addr))
++
++#define writeq(val, addr) __writeq((val), (addr))
++#define writel(val, addr) __writel((val), (addr))
++#define writew(val, addr) __writew((val), (addr))
++#define writeb(val, addr) __writeb((val), (addr))
+ #define __raw_writeb writeb
+ #define __raw_writew writew
+ #define __raw_writel writel
+ #define __raw_writeq writeq
+
+-void __memcpy_fromio(void*,unsigned long,unsigned);
+-void __memcpy_toio(unsigned long,const void*,unsigned);
++void __memcpy_fromio(void *, unsigned long, unsigned);
++void __memcpy_toio(unsigned long, const void *, unsigned);
+
+-static inline void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len)
++static inline void memcpy_fromio(void *to, const volatile void __iomem *from,
++ unsigned len)
+ {
+- __memcpy_fromio(to,(unsigned long)from,len);
++ __memcpy_fromio(to, (unsigned long)from, len);
+ }
+-static inline void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len)
++
++static inline void memcpy_toio(volatile void __iomem *to, const void *from,
++ unsigned len)
+ {
+- __memcpy_toio((unsigned long)to,from,len);
++ __memcpy_toio((unsigned long)to, from, len);
+ }
+
+ void memset_io(volatile void __iomem *a, int b, size_t c);
+@@ -292,18 +318,12 @@ void memset_io(volatile void __iomem *a,
+ */
+ #define __ISA_IO_base ((char __iomem *)(fix_to_virt(FIX_ISAMAP_BEGIN)))
+
+-#define flush_write_buffers()
++#define flush_write_buffers()
+
+ extern int iommu_bio_merge;
+ #define BIO_VMERGE_BOUNDARY iommu_bio_merge
+
+ /*
+- * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+- * access
+- */
+-#define xlate_dev_mem_ptr(p) __va(p)
+-
+-/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+ #define xlate_dev_kmem_ptr(p) p
+--- a/include/asm-x86/mach-xen/asm/io.h
++++ b/include/asm-x86/mach-xen/asm/io.h
+@@ -1,5 +1,22 @@
++#ifndef _ASM_X86_IO_H
++#define _ASM_X86_IO_H
++
++#define ARCH_HAS_IOREMAP_WC
++
+ #ifdef CONFIG_X86_32
+ # include "io_32.h"
+ #else
+ # include "io_64.h"
+ #endif
++
++extern void *xlate_dev_mem_ptr(unsigned long phys);
++extern void unxlate_dev_mem_ptr(unsigned long phys, void *addr);
++
++extern void map_devmem(unsigned long pfn, unsigned long len, pgprot_t);
++extern void unmap_devmem(unsigned long pfn, unsigned long len, pgprot_t);
++
++extern int ioremap_check_change_attr(unsigned long mfn, unsigned long size,
++ unsigned long prot_val);
++extern void __iomem *ioremap_wc(unsigned long offset, unsigned long size);
++
++#endif /* _ASM_X86_IO_H */
+--- a/include/asm-x86/mach-xen/asm/irqflags.h
++++ b/include/asm-x86/mach-xen/asm/irqflags.h
+@@ -137,11 +137,11 @@ sysexit_ecrit: /**** END OF SYSEXIT CRIT
+ #endif /* __ASSEMBLY__ */
+
+ #ifndef __ASSEMBLY__
+-#define raw_local_save_flags(flags) \
+- do { (flags) = __raw_local_save_flags(); } while (0)
++#define raw_local_save_flags(flags) \
++ do { (flags) = __raw_local_save_flags(); } while (0)
+
+-#define raw_local_irq_save(flags) \
+- do { (flags) = __raw_local_irq_save(); } while (0)
++#define raw_local_irq_save(flags) \
++ do { (flags) = __raw_local_irq_save(); } while (0)
+
+ static inline int raw_irqs_disabled_flags(unsigned long flags)
+ {
+--- a/include/asm-x86/mach-xen/asm/mmu_context_32.h
++++ b/include/asm-x86/mach-xen/asm/mmu_context_32.h
+@@ -94,7 +94,7 @@ static inline void switch_mm(struct mm_s
+ BUG_ON(per_cpu(cpu_tlbstate, cpu).active_mm != next);
+
+ if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
+- /* We were in lazy tlb mode and leave_mm disabled
++ /* We were in lazy tlb mode and leave_mm disabled
+ * tlb flush IPI delivery. We must reload %cr3.
+ */
+ load_cr3(next->pgd);
+@@ -107,10 +107,10 @@ static inline void switch_mm(struct mm_s
+ #define deactivate_mm(tsk, mm) \
+ asm("movl %0,%%gs": :"r" (0));
+
+-#define activate_mm(prev, next) \
+- do { \
+- xen_activate_mm(prev, next); \
+- switch_mm((prev),(next),NULL); \
+- } while(0)
++#define activate_mm(prev, next) \
++do { \
++ xen_activate_mm(prev, next); \
++ switch_mm((prev), (next), NULL); \
++} while (0)
+
+ #endif
+--- a/include/asm-x86/mach-xen/asm/mmu_context_64.h
++++ b/include/asm-x86/mach-xen/asm/mmu_context_64.h
+@@ -21,7 +21,7 @@ void destroy_context(struct mm_struct *m
+ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
+ {
+ #if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
+- if (read_pda(mmu_state) == TLBSTATE_OK)
++ if (read_pda(mmu_state) == TLBSTATE_OK)
+ write_pda(mmu_state, TLBSTATE_LAZY);
+ #endif
+ }
+@@ -62,7 +62,7 @@ extern void mm_pin(struct mm_struct *mm)
+ extern void mm_unpin(struct mm_struct *mm);
+ void mm_pin_all(void);
+
+-static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
++static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
+ {
+ unsigned cpu = smp_processor_id();
+@@ -106,7 +106,7 @@ static inline void switch_mm(struct mm_s
+ if (read_pda(active_mm) != next)
+ BUG();
+ if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) {
+- /* We were in lazy tlb mode and leave_mm disabled
++ /* We were in lazy tlb mode and leave_mm disabled
+ * tlb flush IPI delivery. We must reload CR3
+ * to make sure to use no freed page tables.
+ */
+@@ -118,10 +118,11 @@ static inline void switch_mm(struct mm_s
+ #endif
+ }
+
+-#define deactivate_mm(tsk,mm) do { \
+- load_gs_index(0); \
+- asm volatile("movl %0,%%fs"::"r"(0)); \
+-} while(0)
++#define deactivate_mm(tsk, mm) \
++do { \
++ load_gs_index(0); \
++ asm volatile("movl %0,%%fs"::"r"(0)); \
++} while (0)
+
+ static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
+ {
+--- a/include/asm-x86/mach-xen/asm/page_64.h
++++ b/include/asm-x86/mach-xen/asm/page_64.h
+@@ -5,7 +5,7 @@
+
+ #define THREAD_ORDER 1
+ #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
+-#define CURRENT_MASK (~(THREAD_SIZE-1))
++#define CURRENT_MASK (~(THREAD_SIZE - 1))
+
+ #define EXCEPTION_STACK_ORDER 0
+ #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
+@@ -53,10 +53,10 @@
+ #define __VIRTUAL_MASK_SHIFT 48
+
+ /*
+- * Kernel image size is limited to 128 MB (see level2_kernel_pgt in
++ * Kernel image size is limited to 512 MB (see level2_kernel_pgt in
+ * arch/x86/kernel/head_64.S), and it is mapped here:
+ */
+-#define KERNEL_IMAGE_SIZE (128*1024*1024)
++#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
+ #define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL)
+
+ #ifndef __ASSEMBLY__
+@@ -64,7 +64,6 @@ void clear_page(void *page);
+ void copy_page(void *to, void *from);
+
+ extern unsigned long end_pfn;
+-extern unsigned long end_pfn_map;
+
+ static inline unsigned long __phys_addr(unsigned long x)
+ {
+@@ -89,6 +88,9 @@ typedef union { pteval_t pte; unsigned i
+
+ #define vmemmap ((struct page *)VMEMMAP_START)
+
++extern unsigned long init_memory_mapping(unsigned long start,
++ unsigned long end);
++
+ #endif /* !__ASSEMBLY__ */
+
+ #ifdef CONFIG_FLATMEM
+--- a/include/asm-x86/mach-xen/asm/page.h
++++ b/include/asm-x86/mach-xen/asm/page.h
+@@ -20,8 +20,16 @@
+ #define _PAGE_BIT_IO 9
+ #define _PAGE_IO (_AC(1, L)<<_PAGE_BIT_IO)
+
+-#define PHYSICAL_PAGE_MASK (~(_AT(phys_addr_t, PAGE_SIZE) - 1) & __PHYSICAL_MASK)
+-#define PTE_MASK _AT(pteval_t, PHYSICAL_PAGE_MASK)
++#define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1)
++#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
++
++/* Cast PAGE_MASK to a signed type so that it is sign-extended if
++ virtual addresses are 32-bits but physical addresses are larger
++ (ie, 32-bit PAE). */
++#define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
++
++/* PTE_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
++#define PTE_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
+
+ #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT)
+ #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1))
+@@ -34,19 +42,14 @@
+ /* to align the pointer to the (next) page boundary */
+ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+-#define __PHYSICAL_MASK _AT(phys_addr_t, (_AC(1,ULL) << __PHYSICAL_MASK_SHIFT) - 1)
+-#define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
+-
+ #ifndef __ASSEMBLY__
+ #include <linux/types.h>
+ #endif
+
+ #ifdef CONFIG_X86_64
+ #include <asm/page_64.h>
+-#define max_pfn_mapped end_pfn_map
+ #else
+ #include <asm/page_32.h>
+-#define max_pfn_mapped max_low_pfn
+ #endif /* CONFIG_X86_64 */
+
+ #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
+@@ -59,6 +62,9 @@
+ #ifndef __ASSEMBLY__
+
+ extern int page_is_ram(unsigned long pagenr);
++extern int devmem_is_allowed(unsigned long pagenr);
++
++extern unsigned long max_pfn_mapped;
+
+ struct page;
+
+--- a/include/asm-x86/mach-xen/asm/pci_64.h
++++ b/include/asm-x86/mach-xen/asm/pci_64.h
+@@ -1,12 +1,10 @@
+ #ifndef __x8664_PCI_H
+ #define __x8664_PCI_H
+
+-
+ #ifdef __KERNEL__
+
+-
+ #ifdef CONFIG_CALGARY_IOMMU
+-static inline void* pci_iommu(struct pci_bus *bus)
++static inline void *pci_iommu(struct pci_bus *bus)
+ {
+ struct pci_sysdata *sd = bus->sysdata;
+ return sd->iommu;
+@@ -19,13 +17,12 @@ static inline void set_pci_iommu(struct
+ }
+ #endif /* CONFIG_CALGARY_IOMMU */
+
++extern int (*pci_config_read)(int seg, int bus, int dev, int fn,
++ int reg, int len, u32 *value);
++extern int (*pci_config_write)(int seg, int bus, int dev, int fn,
++ int reg, int len, u32 value);
+
+-extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
+-extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
+-
+-
+-
+-extern void pci_iommu_alloc(void);
++extern void dma32_reserve_bootmem(void);
+
+ /* The PCI address space does equal the physical memory
+ * address space. The networking and block device layers use
+@@ -82,5 +79,4 @@ extern void pci_iommu_alloc(void);
+
+ #endif /* __KERNEL__ */
+
+-
+ #endif /* __x8664_PCI_H */
+--- a/include/asm-x86/mach-xen/asm/pci.h
++++ b/include/asm-x86/mach-xen/asm/pci.h
+@@ -8,14 +8,13 @@
+ #include <asm/scatterlist.h>
+ #include <asm/io.h>
+
+-
+ #ifdef __KERNEL__
+
+ struct pci_sysdata {
+ int domain; /* PCI domain */
+ int node; /* NUMA node */
+ #ifdef CONFIG_X86_64
+- void* iommu; /* IOMMU private data */
++ void *iommu; /* IOMMU private data */
+ #endif
+ #ifdef CONFIG_XEN_PCIDEV_FRONTEND
+ struct pcifront_device *pdev;
+@@ -23,6 +22,8 @@ struct pci_sysdata {
+ };
+
+ /* scan a bus after allocating a pci_sysdata for it */
++extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
++ int node);
+ extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
+
+ static inline int pci_domain_nr(struct pci_bus *bus)
+@@ -36,6 +37,7 @@ static inline int pci_proc_domain(struct
+ return pci_domain_nr(bus);
+ }
+
++extern void pci_iommu_alloc(void);
+
+ /* Can be used to override the logic in pci_scan_bus for skipping
+ already-configured bus numbers - to be used for buggy BIOSes
+@@ -57,7 +59,7 @@ extern unsigned long pci_mem_start;
+ #define PCIBIOS_MIN_CARDBUS_IO 0x4000
+
+ void pcibios_config_init(void);
+-struct pci_bus * pcibios_scan_root(int bus);
++struct pci_bus *pcibios_scan_root(int bus);
+
+ void pcibios_set_master(struct pci_dev *dev);
+ void pcibios_penalize_isa_irq(int irq, int active);
+@@ -67,7 +69,8 @@ int pcibios_set_irq_routing(struct pci_d
+
+ #define HAVE_PCI_MMAP
+ extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+- enum pci_mmap_state mmap_state, int write_combine);
++ enum pci_mmap_state mmap_state,
++ int write_combine);
+
+
+ #ifdef CONFIG_PCI
+--- a/include/asm-x86/mach-xen/asm/pgalloc_32.h
++++ /dev/null
+@@ -1,111 +0,0 @@
+-#ifndef _I386_PGALLOC_H
+-#define _I386_PGALLOC_H
+-
+-#include <linux/threads.h>
+-#include <linux/mm.h> /* for struct page */
+-#include <linux/pagemap.h>
+-#include <asm/tlb.h>
+-#include <asm-generic/tlb.h>
+-#include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
+-
+-#define paravirt_alloc_pt(mm, pfn) do { } while (0)
+-#define paravirt_alloc_pd(mm, pfn) do { } while (0)
+-#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
+-#define paravirt_release_pt(pfn) do { } while (0)
+-#define paravirt_release_pd(pfn) do { } while (0)
+-
+-static inline void pmd_populate_kernel(struct mm_struct *mm,
+- pmd_t *pmd, pte_t *pte)
+-{
+- paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT);
+- set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
+-}
+-
+-static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
+-{
+- unsigned long pfn = page_to_pfn(pte);
+-
+- paravirt_alloc_pt(mm, pfn);
+- if (PagePinned(virt_to_page(mm->pgd))) {
+- if (!PageHighMem(pte))
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)__va(pfn << PAGE_SHIFT),
+- pfn_pte(pfn, PAGE_KERNEL_RO), 0));
+- else if (!test_and_set_bit(PG_pinned, &pte->flags))
+- kmap_flush_unused();
+- set_pmd(pmd, __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
+- } else
+- *pmd = __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE);
+-}
+-#define pmd_pgtable(pmd) pmd_page(pmd)
+-
+-/*
+- * Allocate and free page tables.
+- */
+-extern void pgd_test_and_unpin(pgd_t *);
+-extern pgd_t *pgd_alloc(struct mm_struct *);
+-extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
+-
+-extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
+-extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
+-
+-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+-{
+- make_lowmem_page_writable(pte, XENFEAT_writable_page_tables);
+- free_page((unsigned long)pte);
+-}
+-
+-extern void __pte_free(pgtable_t);
+-static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+-{
+- __pte_free(pte);
+-}
+-
+-
+-extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
+-
+-#ifdef CONFIG_X86_PAE
+-/*
+- * In the PAE case we free the pmds as part of the pgd.
+- */
+-extern pmd_t *pmd_alloc_one(struct mm_struct *, unsigned long);
+-
+-extern void __pmd_free(pgtable_t);
+-static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+-{
+- BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
+- __pmd_free(virt_to_page(pmd));
+-}
+-
+-extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
+-
+-static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd)
+-{
+- struct page *page = virt_to_page(pmd);
+- unsigned long pfn = page_to_pfn(page);
+-
+- paravirt_alloc_pd(mm, pfn);
+-
+- /* Note: almost everything apart from _PAGE_PRESENT is
+- reserved at the pmd (PDPT) level. */
+- if (PagePinned(virt_to_page(mm->pgd))) {
+- BUG_ON(PageHighMem(page));
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)__va(pfn << PAGE_SHIFT),
+- pfn_pte(pfn, PAGE_KERNEL_RO), 0));
+- set_pud(pudp, __pud(__pa(pmd) | _PAGE_PRESENT));
+- } else
+- *pudp = __pud(__pa(pmd) | _PAGE_PRESENT);
+-
+- /*
+- * According to Intel App note "TLBs, Paging-Structure Caches,
+- * and Their Invalidation", April 2007, document 317080-001,
+- * section 8.1: in PAE mode we explicitly have to flush the
+- * TLB via cr3 if the top-level pgd is changed...
+- */
+- if (mm == current->active_mm)
+- xen_tlb_flush();
+-}
+-#endif /* CONFIG_X86_PAE */
+-
+-#endif /* _I386_PGALLOC_H */
+--- a/include/asm-x86/mach-xen/asm/pgalloc_64.h
++++ /dev/null
+@@ -1,179 +0,0 @@
+-#ifndef _X86_64_PGALLOC_H
+-#define _X86_64_PGALLOC_H
+-
+-#include <asm/pda.h>
+-#include <linux/threads.h>
+-#include <linux/mm.h>
+-#include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
+-
+-pmd_t *early_get_pmd(unsigned long va);
+-void early_make_page_readonly(void *va, unsigned int feature);
+-
+-#define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
+-
+-#define pmd_populate_kernel(mm, pmd, pte) \
+- set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
+-
+-static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+-{
+- if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)pmd,
+- pfn_pte(virt_to_phys(pmd)>>PAGE_SHIFT,
+- PAGE_KERNEL_RO), 0));
+- set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
+- } else {
+- *(pud) = __pud(_PAGE_TABLE | __pa(pmd));
+- }
+-}
+-
+-/*
+- * We need to use the batch mode here, but pgd_pupulate() won't be
+- * be called frequently.
+- */
+-static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
+-{
+- if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)pud,
+- pfn_pte(virt_to_phys(pud)>>PAGE_SHIFT,
+- PAGE_KERNEL_RO), 0));
+- set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
+- set_pgd(__user_pgd(pgd), __pgd(_PAGE_TABLE | __pa(pud)));
+- } else {
+- *(pgd) = __pgd(_PAGE_TABLE | __pa(pud));
+- *(__user_pgd(pgd)) = *(pgd);
+- }
+-}
+-
+-#define pmd_pgtable(pmd) pmd_page(pmd)
+-
+-static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
+-{
+- if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)__va(page_to_pfn(pte) << PAGE_SHIFT),
+- pfn_pte(page_to_pfn(pte), PAGE_KERNEL_RO), 0));
+- set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
+- } else {
+- *(pmd) = __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT));
+- }
+-}
+-
+-extern void __pmd_free(pgtable_t);
+-static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+-{
+- BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
+- __pmd_free(virt_to_page(pmd));
+-}
+-
+-extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr);
+-
+-static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
+-{
+- return (pud_t *)pmd_alloc_one(mm, addr);
+-}
+-
+-static inline void pud_free(struct mm_struct *mm, pud_t *pud)
+-{
+- BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
+- __pmd_free(virt_to_page(pud));
+-}
+-
+-static inline void pgd_list_add(pgd_t *pgd)
+-{
+- struct page *page = virt_to_page(pgd);
+- unsigned long flags;
+-
+- spin_lock_irqsave(&pgd_lock, flags);
+- list_add(&page->lru, &pgd_list);
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-}
+-
+-static inline void pgd_list_del(pgd_t *pgd)
+-{
+- struct page *page = virt_to_page(pgd);
+- unsigned long flags;
+-
+- spin_lock_irqsave(&pgd_lock, flags);
+- list_del(&page->lru);
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-}
+-
+-extern void pgd_test_and_unpin(pgd_t *);
+-
+-static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+-{
+- /*
+- * We allocate two contiguous pages for kernel and user.
+- */
+- unsigned boundary;
+- pgd_t *pgd = (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_REPEAT, 1);
+- if (!pgd)
+- return NULL;
+- pgd_list_add(pgd);
+- pgd_test_and_unpin(pgd);
+- /*
+- * Copy kernel pointers in from init.
+- * Could keep a freelist or slab cache of those because the kernel
+- * part never changes.
+- */
+- boundary = pgd_index(__PAGE_OFFSET);
+- memset(pgd, 0, boundary * sizeof(pgd_t));
+- memcpy(pgd + boundary,
+- init_level4_pgt + boundary,
+- (PTRS_PER_PGD - boundary) * sizeof(pgd_t));
+-
+- memset(__user_pgd(pgd), 0, PAGE_SIZE); /* clean up user pgd */
+- /*
+- * Set level3_user_pgt for vsyscall area
+- */
+- __user_pgd(pgd)[pgd_index(VSYSCALL_START)] =
+- __pgd(__pa_symbol(level3_user_pgt) | _PAGE_TABLE);
+- return pgd;
+-}
+-
+-static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+-{
+- pgd_test_and_unpin(pgd);
+- pgd_list_del(pgd);
+- free_pages((unsigned long)pgd, 1);
+-}
+-
+-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+-{
+- pte_t *pte = (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
+- if (pte)
+- make_page_readonly(pte, XENFEAT_writable_page_tables);
+-
+- return pte;
+-}
+-
+-extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
+-
+-/* Should really implement gc for free page table pages. This could be
+- done with a reference count in struct page. */
+-
+-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+-{
+- BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
+- make_page_writable(pte, XENFEAT_writable_page_tables);
+- free_page((unsigned long)pte);
+-}
+-
+-extern void __pte_free(pgtable_t);
+-static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+-{
+- __pte_free(pte);
+-}
+-
+-#define __pte_free_tlb(tlb,pte) \
+-do { \
+- pgtable_page_dtor((pte)); \
+- tlb_remove_page((tlb), (pte)); \
+-} while (0)
+-
+-#define __pmd_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
+-#define __pud_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
+-
+-#endif /* _X86_64_PGALLOC_H */
+--- a/include/asm-x86/mach-xen/asm/pgalloc.h
++++ b/include/asm-x86/mach-xen/asm/pgalloc.h
+@@ -1,5 +1,149 @@
+-#ifdef CONFIG_X86_32
+-# include "pgalloc_32.h"
+-#else
+-# include "pgalloc_64.h"
++#ifndef _ASM_X86_PGALLOC_H
++#define _ASM_X86_PGALLOC_H
++
++#include <linux/threads.h>
++#include <linux/mm.h> /* for struct page */
++#include <linux/pagemap.h>
++
++#include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
++
++static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {}
++static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {}
++static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn,
++ unsigned long start, unsigned long count) {}
++static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {}
++static inline void paravirt_release_pte(unsigned long pfn) {}
++static inline void paravirt_release_pmd(unsigned long pfn) {}
++static inline void paravirt_release_pud(unsigned long pfn) {}
++
++#ifdef CONFIG_X86_64
++void early_make_page_readonly(void *va, unsigned int feature);
++pmd_t *early_get_pmd(unsigned long va);
++#define make_lowmem_page_readonly make_page_readonly
++#define make_lowmem_page_writable make_page_writable
+ #endif
++
++/*
++ * Allocate and free page tables.
++ */
++extern pgd_t *pgd_alloc(struct mm_struct *);
++extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
++
++extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
++extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
++
++/* Should really implement gc for free page table pages. This could be
++ done with a reference count in struct page. */
++
++static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
++{
++ BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
++ make_lowmem_page_writable(pte, XENFEAT_writable_page_tables);
++ free_page((unsigned long)pte);
++}
++
++extern void __pte_free(pgtable_t);
++static inline void pte_free(struct mm_struct *mm, struct page *pte)
++{
++ __pte_free(pte);
++}
++
++extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
++
++static inline void pmd_populate_kernel(struct mm_struct *mm,
++ pmd_t *pmd, pte_t *pte)
++{
++ paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
++ set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
++}
++
++static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
++ struct page *pte)
++{
++ unsigned long pfn = page_to_pfn(pte);
++
++ paravirt_alloc_pte(mm, pfn);
++ if (PagePinned(virt_to_page(mm->pgd))) {
++ if (!PageHighMem(pte))
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, PAGE_KERNEL_RO), 0));
++#ifndef CONFIG_X86_64
++ else if (!TestSetPagePinned(pte))
++ kmap_flush_unused();
++#endif
++ set_pmd(pmd, __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
++ } else
++ *pmd = __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE);
++}
++
++#define pmd_pgtable(pmd) pmd_page(pmd)
++
++#if PAGETABLE_LEVELS > 2
++extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr);
++extern void __pmd_free(pgtable_t);
++
++static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
++{
++ BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
++ __pmd_free(virt_to_page(pmd));
++}
++
++extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
++
++#ifdef CONFIG_X86_PAE
++extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
++#else /* !CONFIG_X86_PAE */
++static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
++{
++ paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
++ if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)pmd,
++ pfn_pte(virt_to_phys(pmd)>>PAGE_SHIFT,
++ PAGE_KERNEL_RO), 0));
++ set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
++ } else
++ *pud = __pud(_PAGE_TABLE | __pa(pmd));
++}
++#endif /* CONFIG_X86_PAE */
++
++#if PAGETABLE_LEVELS > 3
++#define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
++
++/*
++ * We need to use the batch mode here, but pgd_pupulate() won't be
++ * be called frequently.
++ */
++static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
++{
++ paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
++ if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
++ BUG_ON(HYPERVISOR_update_va_mapping(
++ (unsigned long)pud,
++ pfn_pte(virt_to_phys(pud)>>PAGE_SHIFT,
++ PAGE_KERNEL_RO), 0));
++ set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
++ set_pgd(__user_pgd(pgd), __pgd(_PAGE_TABLE | __pa(pud)));
++ } else {
++ *(pgd) = __pgd(_PAGE_TABLE | __pa(pud));
++ *__user_pgd(pgd) = *(pgd);
++ }
++}
++
++static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
++{
++ return (pud_t *)pmd_alloc_one(mm, addr);
++}
++
++static inline void pud_free(struct mm_struct *mm, pud_t *pud)
++{
++ BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
++ __pmd_free(virt_to_page(pud));
++}
++
++extern void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
++#endif /* PAGETABLE_LEVELS > 3 */
++#endif /* PAGETABLE_LEVELS > 2 */
++
++#endif /* _ASM_X86_PGALLOC_H */
+--- a/include/asm-x86/mach-xen/asm/pgtable_32.h
++++ b/include/asm-x86/mach-xen/asm/pgtable_32.h
+@@ -38,16 +38,13 @@ void paging_init(void);
+ #ifdef CONFIG_X86_PAE
+ # include <asm/pgtable-3level-defs.h>
+ # define PMD_SIZE (1UL << PMD_SHIFT)
+-# define PMD_MASK (~(PMD_SIZE-1))
++# define PMD_MASK (~(PMD_SIZE - 1))
+ #else
+ # include <asm/pgtable-2level-defs.h>
+ #endif
+
+ #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
+-#define PGDIR_MASK (~(PGDIR_SIZE-1))
+-
+-#define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT)
+-#define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS)
++#define PGDIR_MASK (~(PGDIR_SIZE - 1))
+
+ /* Just any arbitrary offset to the start of the vmalloc VM area: the
+ * current 8MB value just means that there will be a 8MB "hole" after the
+@@ -56,21 +53,22 @@ void paging_init(void);
+ * The vmalloc() routines leaves a hole of 4kB between each vmalloced
+ * area for the same reason. ;)
+ */
+-#define VMALLOC_OFFSET (8*1024*1024)
+-#define VMALLOC_START (((unsigned long) high_memory + \
+- 2*VMALLOC_OFFSET-1) & ~(VMALLOC_OFFSET-1))
++#define VMALLOC_OFFSET (8 * 1024 * 1024)
++#define VMALLOC_START (((unsigned long)high_memory + 2 * VMALLOC_OFFSET - 1) \
++ & ~(VMALLOC_OFFSET - 1))
+ #ifdef CONFIG_X86_PAE
+ #define LAST_PKMAP 512
+ #else
+ #define LAST_PKMAP 1024
+ #endif
+
+-#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE*(LAST_PKMAP + 1)) & PMD_MASK)
++#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1)) \
++ & PMD_MASK)
+
+ #ifdef CONFIG_HIGHMEM
+-# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
++# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
+ #else
+-# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
++# define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE)
+ #endif
+
+ /*
+@@ -91,10 +89,10 @@ extern unsigned long pg0[];
+ /* pmd_present doesn't just test the _PAGE_PRESENT bit since wr.p.t.
+ can temporarily clear it. */
+ #define pmd_present(x) (__pmd_val(x))
+-#define pmd_bad(x) ((__pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER & ~_PAGE_PRESENT)) != (_KERNPG_TABLE & ~_PAGE_PRESENT))
++#define pmd_bad(x) ((__pmd_val(x) & (~PTE_MASK & ~_PAGE_USER & ~_PAGE_PRESENT)) != (_KERNPG_TABLE & ~_PAGE_PRESENT))
+ #else
+ #define pmd_present(x) (__pmd_val(x) & _PAGE_PRESENT)
+-#define pmd_bad(x) ((__pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
++#define pmd_bad(x) ((__pmd_val(x) & (~PTE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
+ #endif
+
+
+@@ -107,32 +105,18 @@ extern unsigned long pg0[];
+ #endif
+
+ /*
+- * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
+- *
+- * dst - pointer to pgd range anwhere on a pgd page
+- * src - ""
+- * count - the number of pgds to copy.
+- *
+- * dst and src can be on the same page, but the range must not overlap,
+- * and must not cross a page boundary.
++ * Macro to mark a page protection value as "uncacheable".
++ * On processors which do not support it, this is a no-op.
+ */
+-static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
+-{
+- memcpy(dst, src, count * sizeof(pgd_t));
+-}
+-
+-/*
+- * Macro to mark a page protection value as "uncacheable". On processors which do not support
+- * it, this is a no-op.
+- */
+-#define pgprot_noncached(prot) ((boot_cpu_data.x86 > 3) \
+- ? (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) : (prot))
++#define pgprot_noncached(prot) \
++ ((boot_cpu_data.x86 > 3) \
++ ? (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) \
++ : (prot))
+
+ /*
+ * Conversion functions: convert a page and protection to a page entry,
+ * and a page entry and page directory to the page they refer to.
+ */
+-
+ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+
+ /*
+@@ -141,20 +125,20 @@ static inline void clone_pgd_range(pgd_t
+ * this macro returns the index of the entry in the pgd page which would
+ * control the given virtual address
+ */
+-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+-#define pgd_index_k(addr) pgd_index(addr)
++#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
++#define pgd_index_k(addr) pgd_index((addr))
+
+ /*
+ * pgd_offset() returns a (pgd_t *)
+ * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
+ */
+-#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
++#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
+
+ /*
+ * a shortcut which implies the use of the kernel's pgd, instead
+ * of a process's
+ */
+-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
++#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
+
+ static inline int pud_large(pud_t pud) { return 0; }
+
+@@ -164,8 +148,8 @@ static inline int pud_large(pud_t pud) {
+ * this macro returns the index of the entry in the pmd page which would
+ * control the given virtual address
+ */
+-#define pmd_index(address) \
+- (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
++#define pmd_index(address) \
++ (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
+
+ /*
+ * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
+@@ -173,33 +157,36 @@ static inline int pud_large(pud_t pud) {
+ * this macro returns the index of the entry in the pte page which would
+ * control the given virtual address
+ */
+-#define pte_index(address) \
+- (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+-#define pte_offset_kernel(dir, address) \
+- ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
++#define pte_index(address) \
++ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
++#define pte_offset_kernel(dir, address) \
++ ((pte_t *)pmd_page_vaddr(*(dir)) + pte_index((address)))
+
+-#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
++#define pmd_page(pmd) (pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT))
+
+-#define pmd_page_vaddr(pmd) \
+- ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
++#define pmd_page_vaddr(pmd) \
++ ((unsigned long)__va(pmd_val((pmd)) & PTE_MASK))
+
+ #if defined(CONFIG_HIGHPTE)
+-#define pte_offset_map(dir, address) \
+- ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
+-#define pte_offset_map_nested(dir, address) \
+- ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
+-#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
+-#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
+-#else
+-#define pte_offset_map(dir, address) \
+- ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
+-#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
++#define pte_offset_map(dir, address) \
++ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), KM_PTE0) + \
++ pte_index((address)))
++#define pte_offset_map_nested(dir, address) \
++ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), KM_PTE1) + \
++ pte_index((address)))
++#define pte_unmap(pte) kunmap_atomic((pte), KM_PTE0)
++#define pte_unmap_nested(pte) kunmap_atomic((pte), KM_PTE1)
++#else
++#define pte_offset_map(dir, address) \
++ ((pte_t *)page_address(pmd_page(*(dir))) + pte_index((address)))
++#define pte_offset_map_nested(dir, address) pte_offset_map((dir), (address))
+ #define pte_unmap(pte) do { } while (0)
+ #define pte_unmap_nested(pte) do { } while (0)
+ #endif
+
+ /* Clear a kernel PTE and flush it from the TLB */
+-#define kpte_clear_flush(ptep, vaddr) do { \
++#define kpte_clear_flush(ptep, vaddr) \
++do { \
+ if (HYPERVISOR_update_va_mapping(vaddr, __pte(0), UVMF_INVLPG)) \
+ BUG(); \
+ } while (0)
+@@ -208,7 +195,7 @@ static inline int pud_large(pud_t pud) {
+ * The i386 doesn't have any external MMU info: the kernel page
+ * tables contain all the necessary information.
+ */
+-#define update_mmu_cache(vma,address,pte) do { } while (0)
++#define update_mmu_cache(vma, address, pte) do { } while (0)
+
+ void make_lowmem_page_readonly(void *va, unsigned int feature);
+ void make_lowmem_page_writable(void *va, unsigned int feature);
+@@ -225,7 +212,7 @@ void make_lowmem_page_writable(void *va,
+ #define kern_addr_valid(kaddr) (0)
+ #endif
+
+-#define io_remap_pfn_range(vma,from,pfn,size,prot) \
+-direct_remap_pfn_range(vma,from,pfn,size,prot,DOMID_IO)
++#define io_remap_pfn_range(vma, from, pfn, size, prot) \
++ direct_remap_pfn_range(vma, from, pfn, size, prot, DOMID_IO)
+
+ #endif /* _I386_PGTABLE_H */
+--- a/include/asm-x86/mach-xen/asm/pgtable-3level.h
++++ b/include/asm-x86/mach-xen/asm/pgtable-3level.h
+@@ -8,25 +8,28 @@
+ * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
+ */
+
+-#define pte_ERROR(e) \
+- printk("%s:%d: bad pte %p(%016Lx pfn %08lx).\n", __FILE__, __LINE__, \
+- &(e), __pte_val(e), pte_pfn(e))
+-#define pmd_ERROR(e) \
+- printk("%s:%d: bad pmd %p(%016Lx pfn %08Lx).\n", __FILE__, __LINE__, \
+- &(e), __pmd_val(e), (pmd_val(e) & PTE_MASK) >> PAGE_SHIFT)
+-#define pgd_ERROR(e) \
+- printk("%s:%d: bad pgd %p(%016Lx pfn %08Lx).\n", __FILE__, __LINE__, \
+- &(e), __pgd_val(e), (pgd_val(e) & PTE_MASK) >> PAGE_SHIFT)
+-
++#define pte_ERROR(e) \
++ printk("%s:%d: bad pte %p(%016Lx pfn %08lx).\n", \
++ __FILE__, __LINE__, &(e), __pte_val(e), pte_pfn(e))
++#define pmd_ERROR(e) \
++ printk("%s:%d: bad pmd %p(%016Lx pfn %08Lx).\n", \
++ __FILE__, __LINE__, &(e), __pmd_val(e), \
++ (pmd_val(e) & PTE_MASK) >> PAGE_SHIFT)
++#define pgd_ERROR(e) \
++ printk("%s:%d: bad pgd %p(%016Lx pfn %08Lx).\n", \
++ __FILE__, __LINE__, &(e), __pgd_val(e), \
++ (pgd_val(e) & PTE_MASK) >> PAGE_SHIFT)
+
+ static inline int pud_none(pud_t pud)
+ {
+ return __pud_val(pud) == 0;
++
+ }
+ static inline int pud_bad(pud_t pud)
+ {
+ return (__pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER)) != 0;
+ }
++
+ static inline int pud_present(pud_t pud)
+ {
+ return __pud_val(pud) & _PAGE_PRESENT;
+@@ -48,12 +51,14 @@ static inline void xen_set_pte(pte_t *pt
+
+ static inline void xen_set_pte_atomic(pte_t *ptep, pte_t pte)
+ {
+- set_64bit((unsigned long long *)(ptep),__pte_val(pte));
++ set_64bit((unsigned long long *)(ptep), __pte_val(pte));
+ }
++
+ static inline void xen_set_pmd(pmd_t *pmdp, pmd_t pmd)
+ {
+ xen_l2_entry_update(pmdp, pmd);
+ }
++
+ static inline void xen_set_pud(pud_t *pudp, pud_t pud)
+ {
+ xen_l3_entry_update(pudp, pud);
+@@ -92,20 +97,19 @@ static inline void pud_clear(pud_t *pudp
+ * current pgd to avoid unnecessary TLB flushes.
+ */
+ pgd = read_cr3();
+- if (__pa(pudp) >= pgd && __pa(pudp) < (pgd + sizeof(pgd_t)*PTRS_PER_PGD))
++ if (__pa(pudp) >= pgd && __pa(pudp) <
++ (pgd + sizeof(pgd_t)*PTRS_PER_PGD))
+ xen_tlb_flush();
+ }
+
+-#define pud_page(pud) \
+-((struct page *) __va(pud_val(pud) & PAGE_MASK))
++#define pud_page(pud) ((struct page *) __va(pud_val(pud) & PTE_MASK))
+
+-#define pud_page_vaddr(pud) \
+-((unsigned long) __va(pud_val(pud) & PAGE_MASK))
++#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PTE_MASK))
+
+
+ /* Find an entry in the second-level page table.. */
+-#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
+- pmd_index(address))
++#define pmd_offset(pud, address) ((pmd_t *)pud_page(*(pud)) + \
++ pmd_index(address))
+
+ #ifdef CONFIG_SMP
+ static inline pte_t xen_ptep_get_and_clear(pte_t *ptep, pte_t res)
+@@ -150,7 +154,8 @@ static inline int pte_none(pte_t pte)
+ * put the 32 bits of offset into the high part.
+ */
+ #define pte_to_pgoff(pte) ((pte).pte_high)
+-#define pgoff_to_pte(off) ((pte_t) { { .pte_low = _PAGE_FILE, .pte_high = (off) } })
++#define pgoff_to_pte(off) \
++ ((pte_t) { { .pte_low = _PAGE_FILE, .pte_high = (off) } })
+ #define PTE_FILE_MAX_BITS 32
+
+ /* Encode and de-code a swap entry */
+--- a/include/asm-x86/mach-xen/asm/pgtable_64.h
++++ b/include/asm-x86/mach-xen/asm/pgtable_64.h
+@@ -31,7 +31,7 @@ extern void paging_init(void);
+
+ #endif /* !__ASSEMBLY__ */
+
+-#define SHARED_KERNEL_PMD 1
++#define SHARED_KERNEL_PMD 0
+
+ /*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+@@ -59,18 +59,20 @@ extern void paging_init(void);
+
+ #ifndef __ASSEMBLY__
+
+-#define pte_ERROR(e) \
+- printk("%s:%d: bad pte %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
+- &(e), __pte_val(e), pte_pfn(e))
+-#define pmd_ERROR(e) \
+- printk("%s:%d: bad pmd %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
+- &(e), __pmd_val(e), pmd_pfn(e))
+-#define pud_ERROR(e) \
+- printk("%s:%d: bad pud %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
+- &(e), __pud_val(e), (pud_val(e) & __PHYSICAL_MASK) >> PAGE_SHIFT)
+-#define pgd_ERROR(e) \
+- printk("%s:%d: bad pgd %p(%016lx pfn %010lx).\n", __FILE__, __LINE__, \
+- &(e), __pgd_val(e), (pgd_val(e) & __PHYSICAL_MASK) >> PAGE_SHIFT)
++#define pte_ERROR(e) \
++ printk("%s:%d: bad pte %p(%016lx pfn %010lx).\n", \
++ __FILE__, __LINE__, &(e), __pte_val(e), pte_pfn(e))
++#define pmd_ERROR(e) \
++ printk("%s:%d: bad pmd %p(%016lx pfn %010lx).\n", \
++ __FILE__, __LINE__, &(e), __pmd_val(e), pmd_pfn(e))
++#define pud_ERROR(e) \
++ printk("%s:%d: bad pud %p(%016lx pfn %010lx).\n", \
++ __FILE__, __LINE__, &(e), __pud_val(e), \
++ (pud_val(e) & __PHYSICAL_MASK) >> PAGE_SHIFT)
++#define pgd_ERROR(e) \
++ printk("%s:%d: bad pgd %p(%016lx pfn %010lx).\n", \
++ __FILE__, __LINE__, &(e), __pgd_val(e), \
++ (pgd_val(e) & __PHYSICAL_MASK) >> PAGE_SHIFT)
+
+ #define pgd_none(x) (!__pgd_val(x))
+ #define pud_none(x) (!__pud_val(x))
+@@ -125,7 +127,7 @@ static inline void xen_set_pgd(pgd_t *pg
+ xen_l4_entry_update(pgdp, pgd);
+ }
+
+-static inline void xen_pgd_clear(pgd_t * pgd)
++static inline void xen_pgd_clear(pgd_t *pgd)
+ {
+ xen_set_pgd(pgd, xen_make_pgd(0));
+ xen_set_pgd(__user_pgd(pgd), xen_make_pgd(0));
+@@ -135,43 +137,43 @@ static inline void xen_pgd_clear(pgd_t *
+
+ #endif /* !__ASSEMBLY__ */
+
+-#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT)
+-#define PMD_MASK (~(PMD_SIZE-1))
+-#define PUD_SIZE (_AC(1,UL) << PUD_SHIFT)
+-#define PUD_MASK (~(PUD_SIZE-1))
+-#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT)
+-#define PGDIR_MASK (~(PGDIR_SIZE-1))
++#define PMD_SIZE (_AC(1, UL) << PMD_SHIFT)
++#define PMD_MASK (~(PMD_SIZE - 1))
++#define PUD_SIZE (_AC(1, UL) << PUD_SHIFT)
++#define PUD_MASK (~(PUD_SIZE - 1))
++#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
++#define PGDIR_MASK (~(PGDIR_SIZE - 1))
+
+
+-#define MAXMEM _AC(0x3fffffffffff, UL)
++#define MAXMEM _AC(0x00003fffffffffff, UL)
+ #define VMALLOC_START _AC(0xffffc20000000000, UL)
+ #define VMALLOC_END _AC(0xffffe1ffffffffff, UL)
+ #define VMEMMAP_START _AC(0xffffe20000000000, UL)
+-#define MODULES_VADDR _AC(0xffffffff88000000, UL)
++#define MODULES_VADDR _AC(0xffffffffa0000000, UL)
+ #define MODULES_END _AC(0xfffffffffff00000, UL)
+ #define MODULES_LEN (MODULES_END - MODULES_VADDR)
+
+ #ifndef __ASSEMBLY__
+
+-static inline unsigned long pgd_bad(pgd_t pgd)
++static inline int pgd_bad(pgd_t pgd)
+ {
+- return __pgd_val(pgd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
++ return (__pgd_val(pgd) & ~(PTE_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+ }
+
+-static inline unsigned long pud_bad(pud_t pud)
++static inline int pud_bad(pud_t pud)
+ {
+- return __pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
++ return (__pud_val(pud) & ~(PTE_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+ }
+
+-static inline unsigned long pmd_bad(pmd_t pmd)
++static inline int pmd_bad(pmd_t pmd)
+ {
+- return __pmd_val(pmd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
++ return (__pmd_val(pmd) & ~(PTE_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+ }
+
+ #define pte_none(x) (!(x).pte)
+ #define pte_present(x) ((x).pte & (_PAGE_PRESENT | _PAGE_PROTNONE))
+
+-#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) /* FIXME: is this right? */
++#define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT)) /* FIXME: is this right? */
+
+ #define __pte_mfn(_pte) (((_pte).pte & PTE_MASK) >> PAGE_SHIFT)
+ #define pte_mfn(_pte) ((_pte).pte & _PAGE_PRESENT ? \
+@@ -181,13 +183,13 @@ static inline unsigned long pmd_bad(pmd_
+ mfn_to_local_pfn(__pte_mfn(_pte)) : \
+ __pte_mfn(_pte))
+
+-#define pte_page(x) pfn_to_page(pte_pfn(x))
++#define pte_page(x) pfn_to_page(pte_pfn((x)))
+
+ /*
+ * Macro to mark a page protection value as "uncacheable".
+ */
+-#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT))
+-
++#define pgprot_noncached(prot) \
++ (__pgprot(pgprot_val((prot)) | _PAGE_PCD | _PAGE_PWT))
+
+ /*
+ * Conversion functions: convert a page and protection to a page entry,
+@@ -197,36 +199,39 @@ static inline unsigned long pmd_bad(pmd_
+ /*
+ * Level 4 access.
+ */
+-#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_val(pgd) & PTE_MASK))
+-#define pgd_page(pgd) (pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT))
+-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+-#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
+-#define pgd_offset_k(address) (init_level4_pgt + pgd_index(address))
++#define pgd_page_vaddr(pgd) \
++ ((unsigned long)__va((unsigned long)pgd_val((pgd)) & PTE_MASK))
++#define pgd_page(pgd) (pfn_to_page(pgd_val((pgd)) >> PAGE_SHIFT))
++#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
++#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
++#define pgd_offset_k(address) (init_level4_pgt + pgd_index((address)))
+ #define pgd_present(pgd) (__pgd_val(pgd) & _PAGE_PRESENT)
+ static inline int pgd_large(pgd_t pgd) { return 0; }
+ #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
+
+ /* PUD - Level3 access */
+ /* to find an entry in a page-table-directory. */
+-#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PHYSICAL_PAGE_MASK))
+-#define pud_page(pud) (pfn_to_page(pud_val(pud) >> PAGE_SHIFT))
+-#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
+-#define pud_offset(pgd, address) ((pud_t *) pgd_page_vaddr(*(pgd)) + pud_index(address))
++#define pud_page_vaddr(pud) \
++ ((unsigned long)__va(pud_val((pud)) & PHYSICAL_PAGE_MASK))
++#define pud_page(pud) (pfn_to_page(pud_val((pud)) >> PAGE_SHIFT))
++#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
++#define pud_offset(pgd, address) \
++ ((pud_t *)pgd_page_vaddr(*(pgd)) + pud_index((address)))
+ #define pud_present(pud) (__pud_val(pud) & _PAGE_PRESENT)
+
+ static inline int pud_large(pud_t pte)
+ {
+- return (__pud_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) ==
+- (_PAGE_PSE|_PAGE_PRESENT);
++ return (__pud_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) ==
++ (_PAGE_PSE | _PAGE_PRESENT);
+ }
+
+ /* PMD - Level 2 access */
+-#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK))
+-#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
++#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val((pmd)) & PTE_MASK))
++#define pmd_page(pmd) (pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT))
+
+-#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
+-#define pmd_offset(dir, address) ((pmd_t *) pud_page_vaddr(*(dir)) + \
+- pmd_index(address))
++#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
++#define pmd_offset(dir, address) ((pmd_t *)pud_page_vaddr(*(dir)) + \
++ pmd_index(address))
+ #define pmd_none(x) (!__pmd_val(x))
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ /* pmd_present doesn't just test the _PAGE_PRESENT bit since wr.p.t.
+@@ -235,43 +240,56 @@ static inline int pud_large(pud_t pte)
+ #else
+ #define pmd_present(x) (__pmd_val(x) & _PAGE_PRESENT)
+ #endif
+-#define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot)))
+-#define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)
++#define pfn_pmd(nr, prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val((prot))))
++#define pmd_pfn(x) ((pmd_val((x)) & __PHYSICAL_MASK) >> PAGE_SHIFT)
+
+ #define pte_to_pgoff(pte) ((__pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
+-#define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | _PAGE_FILE })
++#define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | \
++ _PAGE_FILE })
+ #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT
+
+ /* PTE - Level 1 access. */
+
+ /* page, protection -> pte */
+-#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+-
+-#define pte_index(address) \
+- (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
++#define mk_pte(page, pgprot) pfn_pte(page_to_pfn((page)), (pgprot))
++
++#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+ #define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_vaddr(*(dir)) + \
+- pte_index(address))
++ pte_index((address)))
+
+ /* x86-64 always has all page tables mapped. */
+-#define pte_offset_map(dir,address) pte_offset_kernel(dir,address)
+-#define pte_offset_map_nested(dir,address) pte_offset_kernel(dir,address)
++#define pte_offset_map(dir, address) pte_offset_kernel((dir), (address))
++#define pte_offset_map_nested(dir, address) pte_offset_kernel((dir), (address))
+ #define pte_unmap(pte) /* NOP */
+-#define pte_unmap_nested(pte) /* NOP */
++#define pte_unmap_nested(pte) /* NOP */
++
++#define update_mmu_cache(vma, address, pte) do { } while (0)
+
+-#define update_mmu_cache(vma,address,pte) do { } while (0)
++extern int direct_gbpages;
+
+ /* Encode and de-code a swap entry */
+-#define __swp_type(x) (((x).val >> 1) & 0x3f)
+-#define __swp_offset(x) ((x).val >> 8)
+-#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
++#if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE
++#define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1)
++#define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1)
++#else
++#define SWP_TYPE_BITS (_PAGE_BIT_PROTNONE - _PAGE_BIT_PRESENT - 1)
++#define SWP_OFFSET_SHIFT (_PAGE_BIT_FILE + 1)
++#endif
++
++#define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \
++ & ((1U << SWP_TYPE_BITS) - 1))
++#define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT)
++#define __swp_entry(type, offset) ((swp_entry_t) { \
++ ((type) << (_PAGE_BIT_PRESENT + 1)) \
++ | ((offset) << SWP_OFFSET_SHIFT) })
+ #define __pte_to_swp_entry(pte) ((swp_entry_t) { __pte_val(pte) })
+ #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
+
+-extern int kern_addr_valid(unsigned long addr);
++extern int kern_addr_valid(unsigned long addr);
+ extern void cleanup_highmap(void);
+
+-#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
+- direct_remap_pfn_range(vma,vaddr,pfn,size,prot,DOMID_IO)
++#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
++ direct_remap_pfn_range(vma, vaddr, pfn, size, prot, DOMID_IO)
+
+ #define HAVE_ARCH_UNMAPPED_AREA
+ #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
+@@ -284,8 +302,10 @@ extern void cleanup_highmap(void);
+
+ /* fs/proc/kcore.c */
+ #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK)
+-#define kc_offset_to_vaddr(o) \
+- (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))
++#define kc_offset_to_vaddr(o) \
++ (((o) & (1UL << (__VIRTUAL_MASK_SHIFT - 1))) \
++ ? ((o) | ~__VIRTUAL_MASK) \
++ : (o))
+
+ #define __HAVE_ARCH_PTE_SAME
+ #endif /* !__ASSEMBLY__ */
+--- a/include/asm-x86/mach-xen/asm/pgtable.h
++++ b/include/asm-x86/mach-xen/asm/pgtable.h
+@@ -1,17 +1,15 @@
+ #ifndef _ASM_X86_PGTABLE_H
+ #define _ASM_X86_PGTABLE_H
+
+-#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
+ #define FIRST_USER_ADDRESS 0
+
+-#define _PAGE_BIT_PRESENT 0
+-#define _PAGE_BIT_RW 1
+-#define _PAGE_BIT_USER 2
+-#define _PAGE_BIT_PWT 3
+-#define _PAGE_BIT_PCD 4
+-#define _PAGE_BIT_ACCESSED 5
+-#define _PAGE_BIT_DIRTY 6
+-#define _PAGE_BIT_FILE 6
++#define _PAGE_BIT_PRESENT 0 /* is present */
++#define _PAGE_BIT_RW 1 /* writeable */
++#define _PAGE_BIT_USER 2 /* userspace addressable */
++#define _PAGE_BIT_PWT 3 /* page write through */
++#define _PAGE_BIT_PCD 4 /* page cache disabled */
++#define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
++#define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
+ #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
+ #define _PAGE_BIT_PAT 7 /* on 4KB pages */
+ #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
+@@ -22,6 +20,14 @@
+ #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
+ #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
+
++/* If _PAGE_BIT_PRESENT is clear, we use these: */
++
++/* set: nonlinear file mapping, saved PTE; unset:swap */
++#define _PAGE_BIT_FILE _PAGE_BIT_DIRTY
++
++/* if the user mapped it with PROT_NONE; pte_present gives true */
++#define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
++
+ /*
+ * Note: we use _AC(1, L) instead of _AC(1, UL) so that we get a
+ * sign-extended value on 32-bit with all 1's in the upper word,
+@@ -48,10 +54,8 @@
+ #define _PAGE_NX 0
+ #endif
+
+-/* If _PAGE_PRESENT is clear, we use these: */
+-#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */
+-#define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE;
+- pte_present gives true */
++#define _PAGE_FILE (_AC(1, L)<<_PAGE_BIT_FILE)
++#define _PAGE_PROTNONE (_AC(1, L)<<_PAGE_BIT_PROTNONE)
+
+ #ifndef __ASSEMBLY__
+ #if defined(CONFIG_X86_64) && CONFIG_XEN_COMPAT <= 0x030002
+@@ -61,20 +65,42 @@ extern unsigned int __kernel_page_user;
+ #endif
+ #endif
+
+-#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
+-#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY | __kernel_page_user)
++#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
++ _PAGE_ACCESSED | _PAGE_DIRTY)
++#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
++ _PAGE_DIRTY | __kernel_page_user)
++
++/* Set of bits not changed in pte_modify */
++#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_CACHE_MASK | _PAGE_IO | \
++ _PAGE_ACCESSED | _PAGE_DIRTY)
+
+-#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_IO)
++/*
++ * PAT settings are part of the hypervisor interface, which sets the
++ * MSR to 0x050100070406 (i.e. WB, WT, UC-, UC, WC, WP [, UC, UC]).
++ */
++#define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT | _PAGE_PAT)
++#define _PAGE_CACHE_WB (0)
++#define _PAGE_CACHE_WT (_PAGE_PWT)
++#define _PAGE_CACHE_WC (_PAGE_PAT)
++#define _PAGE_CACHE_WP (_PAGE_PAT | _PAGE_PWT)
++#define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
++#define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT)
+
+ #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
+-#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
++ _PAGE_ACCESSED | _PAGE_NX)
+
+-#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
+-#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
+-#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
++ _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
++ _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
++ _PAGE_ACCESSED)
+ #define PAGE_COPY PAGE_COPY_NOEXEC
+-#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
+-#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
++#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
++ _PAGE_ACCESSED | _PAGE_NX)
++#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
++ _PAGE_ACCESSED)
+
+ #ifdef CONFIG_X86_32
+ #define _PAGE_KERNEL_EXEC \
+@@ -93,6 +119,7 @@ extern pteval_t __PAGE_KERNEL, __PAGE_KE
+ #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
+ #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
+ #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
++#define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC)
+ #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
+ #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
+ #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
+@@ -109,6 +136,7 @@ extern pteval_t __PAGE_KERNEL, __PAGE_KE
+ #define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
+ #define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
+ #define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX)
++#define PAGE_KERNEL_WC MAKE_GLOBAL(__PAGE_KERNEL_WC)
+ #define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
+ #define PAGE_KERNEL_UC_MINUS MAKE_GLOBAL(__PAGE_KERNEL_UC_MINUS)
+ #define PAGE_KERNEL_EXEC_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_EXEC_NOCACHE)
+@@ -142,7 +170,7 @@ extern pteval_t __PAGE_KERNEL, __PAGE_KE
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+ */
+-extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
++extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
+ #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+
+ extern spinlock_t pgd_lock;
+@@ -152,30 +180,111 @@ extern struct list_head pgd_list;
+ * The following only work if pte_present() is true.
+ * Undefined behaviour if not..
+ */
+-static inline int pte_dirty(pte_t pte) { return __pte_val(pte) & _PAGE_DIRTY; }
+-static inline int pte_young(pte_t pte) { return __pte_val(pte) & _PAGE_ACCESSED; }
+-static inline int pte_write(pte_t pte) { return __pte_val(pte) & _PAGE_RW; }
+-static inline int pte_file(pte_t pte) { return __pte_val(pte) & _PAGE_FILE; }
+-static inline int pte_huge(pte_t pte) { return __pte_val(pte) & _PAGE_PSE; }
+-static inline int pte_global(pte_t pte) { return 0; }
+-static inline int pte_exec(pte_t pte) { return !(__pte_val(pte) & _PAGE_NX); }
+-
+-static inline int pmd_large(pmd_t pte) {
+- return (__pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) ==
+- (_PAGE_PSE|_PAGE_PRESENT);
+-}
+-
+-static inline pte_t pte_mkclean(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_DIRTY); }
+-static inline pte_t pte_mkold(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED); }
+-static inline pte_t pte_wrprotect(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_RW); }
+-static inline pte_t pte_mkexec(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_NX); }
+-static inline pte_t pte_mkdirty(pte_t pte) { return __pte_ma(__pte_val(pte) | _PAGE_DIRTY); }
+-static inline pte_t pte_mkyoung(pte_t pte) { return __pte_ma(__pte_val(pte) | _PAGE_ACCESSED); }
+-static inline pte_t pte_mkwrite(pte_t pte) { return __pte_ma(__pte_val(pte) | _PAGE_RW); }
+-static inline pte_t pte_mkhuge(pte_t pte) { return __pte_ma(__pte_val(pte) | _PAGE_PSE); }
+-static inline pte_t pte_clrhuge(pte_t pte) { return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_PSE); }
+-static inline pte_t pte_mkglobal(pte_t pte) { return pte; }
+-static inline pte_t pte_clrglobal(pte_t pte) { return pte; }
++static inline int pte_dirty(pte_t pte)
++{
++ return __pte_val(pte) & _PAGE_DIRTY;
++}
++
++static inline int pte_young(pte_t pte)
++{
++ return __pte_val(pte) & _PAGE_ACCESSED;
++}
++
++static inline int pte_write(pte_t pte)
++{
++ return __pte_val(pte) & _PAGE_RW;
++}
++
++static inline int pte_file(pte_t pte)
++{
++ return __pte_val(pte) & _PAGE_FILE;
++}
++
++static inline int pte_huge(pte_t pte)
++{
++ return __pte_val(pte) & _PAGE_PSE;
++}
++
++static inline int pte_global(pte_t pte)
++{
++ return 0;
++}
++
++static inline int pte_exec(pte_t pte)
++{
++ return !(__pte_val(pte) & _PAGE_NX);
++}
++
++static inline int pte_special(pte_t pte)
++{
++ return 0;
++}
++
++static inline int pmd_large(pmd_t pte)
++{
++ return (__pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) ==
++ (_PAGE_PSE | _PAGE_PRESENT);
++}
++
++static inline pte_t pte_mkclean(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_DIRTY);
++}
++
++static inline pte_t pte_mkold(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED);
++}
++
++static inline pte_t pte_wrprotect(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_RW);
++}
++
++static inline pte_t pte_mkexec(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_NX);
++}
++
++static inline pte_t pte_mkdirty(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) | _PAGE_DIRTY);
++}
++
++static inline pte_t pte_mkyoung(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) | _PAGE_ACCESSED);
++}
++
++static inline pte_t pte_mkwrite(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) | _PAGE_RW);
++}
++
++static inline pte_t pte_mkhuge(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) | _PAGE_PSE);
++}
++
++static inline pte_t pte_clrhuge(pte_t pte)
++{
++ return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_PSE);
++}
++
++static inline pte_t pte_mkglobal(pte_t pte)
++{
++ return pte;
++}
++
++static inline pte_t pte_clrglobal(pte_t pte)
++{
++ return pte;
++}
++
++static inline pte_t pte_mkspecial(pte_t pte)
++{
++ return pte;
++}
+
+ extern pteval_t __supported_pte_mask;
+
+@@ -202,15 +311,33 @@ static inline pte_t pte_modify(pte_t pte
+ pteval_t val = pte_val(pte);
+
+ val &= _PAGE_CHG_MASK;
+- val |= pgprot_val(newprot) & __supported_pte_mask;
++ val |= pgprot_val(newprot) & (~_PAGE_CHG_MASK) & __supported_pte_mask;
+
+ return __pte(val);
+ }
+
+-#define pte_pgprot(x) __pgprot(pte_val(x) & (0xfff | _PAGE_NX))
++/* mprotect needs to preserve PAT bits when updating vm_page_prot */
++#define pgprot_modify pgprot_modify
++static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot)
++{
++ pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK;
++ pgprotval_t addbits = pgprot_val(newprot);
++ return __pgprot(preservebits | addbits);
++}
++
++#define pte_pgprot(x) __pgprot(__pte_val(x) & ~PTE_MASK)
+
+ #define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask)
+
++#ifndef __ASSEMBLY__
++#define __HAVE_PHYS_MEM_ACCESS_PROT
++struct file;
++pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
++ unsigned long size, pgprot_t vma_prot);
++int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
++ unsigned long size, pgprot_t *vma_prot);
++#endif
++
+ #define set_pte(ptep, pte) xen_set_pte(ptep, pte)
+ #define set_pte_at(mm, addr, ptep, pte) xen_set_pte_at(mm, addr, ptep, pte)
+
+@@ -246,6 +373,9 @@ static inline pte_t pte_modify(pte_t pte
+ # include "pgtable_64.h"
+ #endif
+
++#define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
++#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
++
+ #ifndef __ASSEMBLY__
+
+ enum {
+@@ -312,46 +442,17 @@ static inline void xen_pte_clear(struct
+ * bit at the same time.
+ */
+ #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+-#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
+-({ \
+- int __changed = !pte_same(*(ptep), entry); \
+- if (__changed && (dirty)) { \
+- if ( likely((vma)->vm_mm == current->mm) ) { \
+- BUG_ON(HYPERVISOR_update_va_mapping(address, \
+- entry, \
+- (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
+- UVMF_INVLPG|UVMF_MULTI)); \
+- } else { \
+- xen_l1_entry_update(ptep, entry); \
+- flush_tlb_page(vma, address); \
+- } \
+- } \
+- __changed; \
+-})
++extern int ptep_set_access_flags(struct vm_area_struct *vma,
++ unsigned long address, pte_t *ptep,
++ pte_t entry, int dirty);
+
+ #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+-#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
+- int __ret = 0; \
+- if (pte_young(*(ptep))) \
+- __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
+- &(ptep)->pte); \
+- if (__ret) \
+- pte_update((vma)->vm_mm, addr, ptep); \
+- __ret; \
+-})
++extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
++ unsigned long addr, pte_t *ptep);
+
+ #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
+-#define ptep_clear_flush_young(vma, address, ptep) \
+-({ \
+- pte_t __pte = *(ptep); \
+- int __young = pte_young(__pte); \
+- __pte = pte_mkold(__pte); \
+- if (PagePinned(virt_to_page((vma)->vm_mm->pgd))) \
+- (void)ptep_set_access_flags(vma, address, ptep, __pte, __young); \
+- else if (__young) \
+- (ptep)->pte_low = __pte.pte_low; \
+- __young; \
+-})
++extern int ptep_clear_flush_young(struct vm_area_struct *vma,
++ unsigned long address, pte_t *ptep);
+
+ #define __HAVE_ARCH_PTEP_CLEAR_FLUSH
+ #define ptep_clear_flush(vma, addr, ptep) \
+@@ -370,7 +471,8 @@ static inline void xen_pte_clear(struct
+ })
+
+ #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+-static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
++ pte_t *ptep)
+ {
+ pte_t pte = *ptep;
+ if (!pte_none(pte)
+@@ -398,13 +500,29 @@ static inline pte_t ptep_get_and_clear(s
+ pte_t xen_ptep_get_and_clear_full(struct vm_area_struct *, unsigned long, pte_t *, int);
+
+ #define __HAVE_ARCH_PTEP_SET_WRPROTECT
+-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
++static inline void ptep_set_wrprotect(struct mm_struct *mm,
++ unsigned long addr, pte_t *ptep)
+ {
+ pte_t pte = *ptep;
+ if (pte_write(pte))
+ set_pte_at(mm, addr, ptep, pte_wrprotect(pte));
+ }
+
++/*
++ * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
++ *
++ * dst - pointer to pgd range anwhere on a pgd page
++ * src - ""
++ * count - the number of pgds to copy.
++ *
++ * dst and src can be on the same page, but the range must not overlap,
++ * and must not cross a page boundary.
++ */
++static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
++{
++ memcpy(dst, src, count * sizeof(pgd_t));
++}
++
+ #define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) \
+ xen_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable)
+
+--- a/include/asm-x86/mach-xen/asm/processor.h
++++ b/include/asm-x86/mach-xen/asm/processor.h
+@@ -3,10 +3,6 @@
+
+ #include <asm/processor-flags.h>
+
+-/* migration helpers, for KVM - will be removed in 2.6.25: */
+-#include <asm/vm86.h>
+-#define Xgt_desc_struct desc_ptr
+-
+ /* Forward declaration, a strange C thing */
+ struct task_struct;
+ struct mm_struct;
+@@ -24,6 +20,7 @@ struct mm_struct;
+ #include <asm/msr.h>
+ #include <asm/desc_defs.h>
+ #include <asm/nops.h>
++
+ #include <linux/personality.h>
+ #include <linux/cpumask.h>
+ #include <linux/cache.h>
+@@ -38,16 +35,18 @@ struct mm_struct;
+ static inline void *current_text_addr(void)
+ {
+ void *pc;
+- asm volatile("mov $1f,%0\n1:":"=r" (pc));
++
++ asm volatile("mov $1f, %0; 1:":"=r" (pc));
++
+ return pc;
+ }
+
+ #ifdef CONFIG_X86_VSMP
+-#define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT)
+-#define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT)
++# define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT)
++# define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT)
+ #else
+-#define ARCH_MIN_TASKALIGN 16
+-#define ARCH_MIN_MMSTRUCT_ALIGN 0
++# define ARCH_MIN_TASKALIGN 16
++# define ARCH_MIN_MMSTRUCT_ALIGN 0
+ #endif
+
+ /*
+@@ -57,68 +56,80 @@ static inline void *current_text_addr(vo
+ */
+
+ struct cpuinfo_x86 {
+- __u8 x86; /* CPU family */
+- __u8 x86_vendor; /* CPU vendor */
+- __u8 x86_model;
+- __u8 x86_mask;
++ __u8 x86; /* CPU family */
++ __u8 x86_vendor; /* CPU vendor */
++ __u8 x86_model;
++ __u8 x86_mask;
+ #ifdef CONFIG_X86_32
+- char wp_works_ok; /* It doesn't on 386's */
+- char hlt_works_ok; /* Problems on some 486Dx4's and old 386's */
+- char hard_math;
+- char rfu;
+- char fdiv_bug;
+- char f00f_bug;
+- char coma_bug;
+- char pad0;
++ char wp_works_ok; /* It doesn't on 386's */
++
++ /* Problems on some 486Dx4's and old 386's: */
++ char hlt_works_ok;
++ char hard_math;
++ char rfu;
++ char fdiv_bug;
++ char f00f_bug;
++ char coma_bug;
++ char pad0;
+ #else
+- /* number of 4K pages in DTLB/ITLB combined(in pages)*/
+- int x86_tlbsize;
+- __u8 x86_virt_bits, x86_phys_bits;
+- /* cpuid returned core id bits */
+- __u8 x86_coreid_bits;
+- /* Max extended CPUID function supported */
+- __u32 extended_cpuid_level;
+-#endif
+- int cpuid_level; /* Maximum supported CPUID level, -1=no CPUID */
+- __u32 x86_capability[NCAPINTS];
+- char x86_vendor_id[16];
+- char x86_model_id[64];
+- int x86_cache_size; /* in KB - valid for CPUS which support this
+- call */
+- int x86_cache_alignment; /* In bytes */
+- int x86_power;
+- unsigned long loops_per_jiffy;
++ /* Number of 4K pages in DTLB/ITLB combined(in pages): */
++ int x86_tlbsize;
++ __u8 x86_virt_bits;
++ __u8 x86_phys_bits;
++ /* CPUID returned core id bits: */
++ __u8 x86_coreid_bits;
++ /* Max extended CPUID function supported: */
++ __u32 extended_cpuid_level;
++#endif
++ /* Maximum supported CPUID level, -1=no CPUID: */
++ int cpuid_level;
++ __u32 x86_capability[NCAPINTS];
++ char x86_vendor_id[16];
++ char x86_model_id[64];
++ /* in KB - valid for CPUS which support this call: */
++ int x86_cache_size;
++ int x86_cache_alignment; /* In bytes */
++ int x86_power;
++ unsigned long loops_per_jiffy;
+ #ifdef CONFIG_SMP
+- cpumask_t llc_shared_map; /* cpus sharing the last level cache */
++ /* cpus sharing the last level cache: */
++ cpumask_t llc_shared_map;
+ #endif
+- u16 x86_max_cores; /* cpuid returned max cores value */
+- u16 apicid;
+- u16 x86_clflush_size;
++ /* cpuid returned max cores value: */
++ u16 x86_max_cores;
++ u16 apicid;
++ u16 initial_apicid;
++ u16 x86_clflush_size;
+ #ifdef CONFIG_SMP
+- u16 booted_cores; /* number of cores as seen by OS */
+- u16 phys_proc_id; /* Physical processor id. */
+- u16 cpu_core_id; /* Core id */
+- u16 cpu_index; /* index into per_cpu list */
++ /* number of cores as seen by the OS: */
++ u16 booted_cores;
++ /* Physical processor id: */
++ u16 phys_proc_id;
++ /* Core id: */
++ u16 cpu_core_id;
++ /* Index into per_cpu list: */
++ u16 cpu_index;
+ #endif
+ } __attribute__((__aligned__(SMP_CACHE_BYTES)));
+
+-#define X86_VENDOR_INTEL 0
+-#define X86_VENDOR_CYRIX 1
+-#define X86_VENDOR_AMD 2
+-#define X86_VENDOR_UMC 3
+-#define X86_VENDOR_NEXGEN 4
+-#define X86_VENDOR_CENTAUR 5
+-#define X86_VENDOR_TRANSMETA 7
+-#define X86_VENDOR_NSC 8
+-#define X86_VENDOR_NUM 9
+-#define X86_VENDOR_UNKNOWN 0xff
++#define X86_VENDOR_INTEL 0
++#define X86_VENDOR_CYRIX 1
++#define X86_VENDOR_AMD 2
++#define X86_VENDOR_UMC 3
++#define X86_VENDOR_CENTAUR 5
++#define X86_VENDOR_TRANSMETA 7
++#define X86_VENDOR_NSC 8
++#define X86_VENDOR_NUM 9
++
++#define X86_VENDOR_UNKNOWN 0xff
+
+ /*
+ * capabilities of CPUs
+ */
+-extern struct cpuinfo_x86 boot_cpu_data;
+-extern struct cpuinfo_x86 new_cpu_data;
+-extern __u32 cleared_cpu_caps[NCAPINTS];
++extern struct cpuinfo_x86 boot_cpu_data;
++extern struct cpuinfo_x86 new_cpu_data;
++
++extern __u32 cleared_cpu_caps[NCAPINTS];
+
+ #ifdef CONFIG_SMP
+ DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
+@@ -129,7 +140,18 @@ DECLARE_PER_CPU(struct cpuinfo_x86, cpu_
+ #define current_cpu_data boot_cpu_data
+ #endif
+
+-void cpu_detect(struct cpuinfo_x86 *c);
++static inline int hlt_works(int cpu)
++{
++#ifdef CONFIG_X86_32
++ return cpu_data(cpu).hlt_works_ok;
++#else
++ return 1;
++#endif
++}
++
++#define cache_line_size() (boot_cpu_data.x86_cache_alignment)
++
++extern void cpu_detect(struct cpuinfo_x86 *c);
+
+ extern void identify_cpu(struct cpuinfo_x86 *);
+ extern void identify_boot_cpu(void);
+@@ -149,12 +171,12 @@ static inline void xen_cpuid(unsigned in
+ unsigned int *ecx, unsigned int *edx)
+ {
+ /* ecx is often an input as well as an output. */
+- __asm__(XEN_CPUID
+- : "=a" (*eax),
+- "=b" (*ebx),
+- "=c" (*ecx),
+- "=d" (*edx)
+- : "0" (*eax), "2" (*ecx));
++ asm(XEN_CPUID
++ : "=a" (*eax),
++ "=b" (*ebx),
++ "=c" (*ecx),
++ "=d" (*edx)
++ : "0" (*eax), "2" (*ecx));
+ }
+
+ static inline void load_cr3(pgd_t *pgdir)
+@@ -166,57 +188,70 @@ static inline void load_cr3(pgd_t *pgdir
+ #ifdef CONFIG_X86_32
+ /* This is the TSS defined by the hardware. */
+ struct x86_hw_tss {
+- unsigned short back_link, __blh;
+- unsigned long sp0;
+- unsigned short ss0, __ss0h;
+- unsigned long sp1;
+- unsigned short ss1, __ss1h; /* ss1 caches MSR_IA32_SYSENTER_CS */
+- unsigned long sp2;
+- unsigned short ss2, __ss2h;
+- unsigned long __cr3;
+- unsigned long ip;
+- unsigned long flags;
+- unsigned long ax, cx, dx, bx;
+- unsigned long sp, bp, si, di;
+- unsigned short es, __esh;
+- unsigned short cs, __csh;
+- unsigned short ss, __ssh;
+- unsigned short ds, __dsh;
+- unsigned short fs, __fsh;
+- unsigned short gs, __gsh;
+- unsigned short ldt, __ldth;
+- unsigned short trace, io_bitmap_base;
++ unsigned short back_link, __blh;
++ unsigned long sp0;
++ unsigned short ss0, __ss0h;
++ unsigned long sp1;
++ /* ss1 caches MSR_IA32_SYSENTER_CS: */
++ unsigned short ss1, __ss1h;
++ unsigned long sp2;
++ unsigned short ss2, __ss2h;
++ unsigned long __cr3;
++ unsigned long ip;
++ unsigned long flags;
++ unsigned long ax;
++ unsigned long cx;
++ unsigned long dx;
++ unsigned long bx;
++ unsigned long sp;
++ unsigned long bp;
++ unsigned long si;
++ unsigned long di;
++ unsigned short es, __esh;
++ unsigned short cs, __csh;
++ unsigned short ss, __ssh;
++ unsigned short ds, __dsh;
++ unsigned short fs, __fsh;
++ unsigned short gs, __gsh;
++ unsigned short ldt, __ldth;
++ unsigned short trace;
++ unsigned short io_bitmap_base;
++
+ } __attribute__((packed));
+ extern struct tss_struct doublefault_tss;
+ #else
+ struct x86_hw_tss {
+- u32 reserved1;
+- u64 sp0;
+- u64 sp1;
+- u64 sp2;
+- u64 reserved2;
+- u64 ist[7];
+- u32 reserved3;
+- u32 reserved4;
+- u16 reserved5;
+- u16 io_bitmap_base;
++ u32 reserved1;
++ u64 sp0;
++ u64 sp1;
++ u64 sp2;
++ u64 reserved2;
++ u64 ist[7];
++ u32 reserved3;
++ u32 reserved4;
++ u16 reserved5;
++ u16 io_bitmap_base;
++
+ } __attribute__((packed)) ____cacheline_aligned;
+ #endif
+ #endif /* CONFIG_X86_NO_TSS */
+
+ /*
+- * Size of io_bitmap.
++ * IO-bitmap sizes:
+ */
+-#define IO_BITMAP_BITS 65536
+-#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
+-#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
+-#define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap)
+-#define INVALID_IO_BITMAP_OFFSET 0x8000
+-#define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000
++#define IO_BITMAP_BITS 65536
++#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
++#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
++#define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap)
++#define INVALID_IO_BITMAP_OFFSET 0x8000
++#define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000
+
+ #ifndef CONFIG_X86_NO_TSS
+ struct tss_struct {
+- struct x86_hw_tss x86_tss;
++ /*
++ * The hardware state:
++ */
++ struct x86_hw_tss x86_tss;
+
+ /*
+ * The extra 1 is there because the CPU will access an
+@@ -224,136 +259,162 @@ struct tss_struct {
+ * bitmap. The extra byte must be all 1 bits, and must
+ * be within the limit.
+ */
+- unsigned long io_bitmap[IO_BITMAP_LONGS + 1];
++ unsigned long io_bitmap[IO_BITMAP_LONGS + 1];
+ /*
+ * Cache the current maximum and the last task that used the bitmap:
+ */
+- unsigned long io_bitmap_max;
+- struct thread_struct *io_bitmap_owner;
++ unsigned long io_bitmap_max;
++ struct thread_struct *io_bitmap_owner;
++
+ /*
+- * pads the TSS to be cacheline-aligned (size is 0x100)
++ * Pad the TSS to be cacheline-aligned (size is 0x100):
+ */
+- unsigned long __cacheline_filler[35];
++ unsigned long __cacheline_filler[35];
+ /*
+- * .. and then another 0x100 bytes for emergency kernel stack
++ * .. and then another 0x100 bytes for the emergency kernel stack:
+ */
+- unsigned long stack[64];
++ unsigned long stack[64];
++
+ } __attribute__((packed));
+
+ DECLARE_PER_CPU(struct tss_struct, init_tss);
+
+-/* Save the original ist values for checking stack pointers during debugging */
++/*
++ * Save the original ist values for checking stack pointers during debugging
++ */
+ struct orig_ist {
+- unsigned long ist[7];
++ unsigned long ist[7];
+ };
+ #endif /* CONFIG_X86_NO_TSS */
+
+ #define MXCSR_DEFAULT 0x1f80
+
+ struct i387_fsave_struct {
+- u32 cwd;
+- u32 swd;
+- u32 twd;
+- u32 fip;
+- u32 fcs;
+- u32 foo;
+- u32 fos;
+- u32 st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
+- u32 status; /* software status information */
++ u32 cwd; /* FPU Control Word */
++ u32 swd; /* FPU Status Word */
++ u32 twd; /* FPU Tag Word */
++ u32 fip; /* FPU IP Offset */
++ u32 fcs; /* FPU IP Selector */
++ u32 foo; /* FPU Operand Pointer Offset */
++ u32 fos; /* FPU Operand Pointer Selector */
++
++ /* 8*10 bytes for each FP-reg = 80 bytes: */
++ u32 st_space[20];
++
++ /* Software status information [not touched by FSAVE ]: */
++ u32 status;
+ };
+
+ struct i387_fxsave_struct {
+- u16 cwd;
+- u16 swd;
+- u16 twd;
+- u16 fop;
++ u16 cwd; /* Control Word */
++ u16 swd; /* Status Word */
++ u16 twd; /* Tag Word */
++ u16 fop; /* Last Instruction Opcode */
+ union {
+ struct {
+- u64 rip;
+- u64 rdp;
++ u64 rip; /* Instruction Pointer */
++ u64 rdp; /* Data Pointer */
+ };
+ struct {
+- u32 fip;
+- u32 fcs;
+- u32 foo;
+- u32 fos;
++ u32 fip; /* FPU IP Offset */
++ u32 fcs; /* FPU IP Selector */
++ u32 foo; /* FPU Operand Offset */
++ u32 fos; /* FPU Operand Selector */
+ };
+ };
+- u32 mxcsr;
+- u32 mxcsr_mask;
+- u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
+- u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
+- u32 padding[24];
++ u32 mxcsr; /* MXCSR Register State */
++ u32 mxcsr_mask; /* MXCSR Mask */
++
++ /* 8*16 bytes for each FP-reg = 128 bytes: */
++ u32 st_space[32];
++
++ /* 16*16 bytes for each XMM-reg = 256 bytes: */
++ u32 xmm_space[64];
++
++ u32 padding[24];
++
+ } __attribute__((aligned(16)));
+
+ struct i387_soft_struct {
+- u32 cwd;
+- u32 swd;
+- u32 twd;
+- u32 fip;
+- u32 fcs;
+- u32 foo;
+- u32 fos;
+- u32 st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
+- u8 ftop, changed, lookahead, no_update, rm, alimit;
+- struct info *info;
+- u32 entry_eip;
++ u32 cwd;
++ u32 swd;
++ u32 twd;
++ u32 fip;
++ u32 fcs;
++ u32 foo;
++ u32 fos;
++ /* 8*10 bytes for each FP-reg = 80 bytes: */
++ u32 st_space[20];
++ u8 ftop;
++ u8 changed;
++ u8 lookahead;
++ u8 no_update;
++ u8 rm;
++ u8 alimit;
++ struct info *info;
++ u32 entry_eip;
+ };
+
+-union i387_union {
++union thread_xstate {
+ struct i387_fsave_struct fsave;
+ struct i387_fxsave_struct fxsave;
+- struct i387_soft_struct soft;
++ struct i387_soft_struct soft;
+ };
+
+-#ifdef CONFIG_X86_32
+-DECLARE_PER_CPU(u8, cpu_llc_id);
+-#elif !defined(CONFIG_X86_NO_TSS)
++#if defined(CONFIG_X86_64) && !defined(CONFIG_X86_NO_TSS)
+ DECLARE_PER_CPU(struct orig_ist, orig_ist);
+ #endif
+
+ extern void print_cpu_info(struct cpuinfo_x86 *);
++extern unsigned int xstate_size;
++extern void free_thread_xstate(struct task_struct *);
++extern struct kmem_cache *task_xstate_cachep;
+ extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
+ extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
+ extern unsigned short num_cache_leaves;
+
+ struct thread_struct {
+-/* cached TLS descriptors. */
+- struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
+- unsigned long sp0;
+- unsigned long sp;
++ /* Cached TLS descriptors: */
++ struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
++ unsigned long sp0;
++ unsigned long sp;
+ #ifdef CONFIG_X86_32
+- unsigned long sysenter_cs;
++ unsigned long sysenter_cs;
+ #else
+- unsigned long usersp; /* Copy from PDA */
+- unsigned short es, ds, fsindex, gsindex;
+-#endif
+- unsigned long ip;
+- unsigned long fs;
+- unsigned long gs;
+-/* Hardware debugging registers */
+- unsigned long debugreg0;
+- unsigned long debugreg1;
+- unsigned long debugreg2;
+- unsigned long debugreg3;
+- unsigned long debugreg6;
+- unsigned long debugreg7;
+-/* fault info */
+- unsigned long cr2, trap_no, error_code;
+-/* floating point info */
+- union i387_union i387 __attribute__((aligned(16)));;
++ unsigned long usersp; /* Copy from PDA */
++ unsigned short es;
++ unsigned short ds;
++ unsigned short fsindex;
++ unsigned short gsindex;
++#endif
++ unsigned long ip;
++ unsigned long fs;
++ unsigned long gs;
++ /* Hardware debugging registers: */
++ unsigned long debugreg0;
++ unsigned long debugreg1;
++ unsigned long debugreg2;
++ unsigned long debugreg3;
++ unsigned long debugreg6;
++ unsigned long debugreg7;
++ /* Fault info: */
++ unsigned long cr2;
++ unsigned long trap_no;
++ unsigned long error_code;
++ /* floating point and extended processor state */
++ union thread_xstate *xstate;
+ #ifdef CONFIG_X86_32
+-/* virtual 86 mode info */
++ /* Virtual 86 mode info */
+ struct vm86_struct __user *vm86_info;
+ unsigned long screen_bitmap;
+ unsigned long v86flags, v86mask, saved_sp0;
+ unsigned int saved_fs, saved_gs;
+ #endif
+-/* IO permissions */
+- unsigned long *io_bitmap_ptr;
+- unsigned long iopl;
+-/* max allowed port in the bitmap, in bytes: */
+- unsigned io_bitmap_max;
++ /* IO permissions: */
++ unsigned long *io_bitmap_ptr;
++ unsigned long iopl;
++ /* Max allowed port in the bitmap, in bytes: */
++ unsigned io_bitmap_max;
+ /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */
+ unsigned long debugctlmsr;
+ /* Debug Store - if not 0 points to a DS Save Area configuration;
+@@ -384,12 +445,12 @@ static inline void xen_set_iopl_mask(uns
+ }
+
+ #ifndef CONFIG_X86_NO_TSS
+-static inline void native_load_sp0(struct tss_struct *tss,
+- struct thread_struct *thread)
++static inline void
++native_load_sp0(struct tss_struct *tss, struct thread_struct *thread)
+ {
+ tss->x86_tss.sp0 = thread->sp0;
+ #ifdef CONFIG_X86_32
+- /* Only happens when SEP is enabled, no need to test "SEP"arately */
++ /* Only happens when SEP is enabled, no need to test "SEP"arately: */
+ if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) {
+ tss->x86_tss.ss1 = thread->sysenter_cs;
+ wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
+@@ -403,8 +464,8 @@ static inline void native_load_sp0(struc
+ } while (0)
+ #endif
+
+-#define __cpuid xen_cpuid
+-#define paravirt_enabled() 0
++#define __cpuid xen_cpuid
++#define paravirt_enabled() 0
+
+ /*
+ * These special macros can be used to get or set a debugging register
+@@ -424,11 +485,12 @@ static inline void native_load_sp0(struc
+ * enable), so that any CPU's that boot up
+ * after us can get the correct flags.
+ */
+-extern unsigned long mmu_cr4_features;
++extern unsigned long mmu_cr4_features;
+
+ static inline void set_in_cr4(unsigned long mask)
+ {
+ unsigned cr4;
++
+ mmu_cr4_features |= mask;
+ cr4 = read_cr4();
+ cr4 |= mask;
+@@ -438,6 +500,7 @@ static inline void set_in_cr4(unsigned l
+ static inline void clear_in_cr4(unsigned long mask)
+ {
+ unsigned cr4;
++
+ mmu_cr4_features &= ~mask;
+ cr4 = read_cr4();
+ cr4 &= ~mask;
+@@ -445,42 +508,42 @@ static inline void clear_in_cr4(unsigned
+ }
+
+ struct microcode_header {
+- unsigned int hdrver;
+- unsigned int rev;
+- unsigned int date;
+- unsigned int sig;
+- unsigned int cksum;
+- unsigned int ldrver;
+- unsigned int pf;
+- unsigned int datasize;
+- unsigned int totalsize;
+- unsigned int reserved[3];
++ unsigned int hdrver;
++ unsigned int rev;
++ unsigned int date;
++ unsigned int sig;
++ unsigned int cksum;
++ unsigned int ldrver;
++ unsigned int pf;
++ unsigned int datasize;
++ unsigned int totalsize;
++ unsigned int reserved[3];
+ };
+
+ struct microcode {
+- struct microcode_header hdr;
+- unsigned int bits[0];
++ struct microcode_header hdr;
++ unsigned int bits[0];
+ };
+
+-typedef struct microcode microcode_t;
+-typedef struct microcode_header microcode_header_t;
++typedef struct microcode microcode_t;
++typedef struct microcode_header microcode_header_t;
+
+ /* microcode format is extended from prescott processors */
+ struct extended_signature {
+- unsigned int sig;
+- unsigned int pf;
+- unsigned int cksum;
++ unsigned int sig;
++ unsigned int pf;
++ unsigned int cksum;
+ };
+
+ struct extended_sigtable {
+- unsigned int count;
+- unsigned int cksum;
+- unsigned int reserved[3];
++ unsigned int count;
++ unsigned int cksum;
++ unsigned int reserved[3];
+ struct extended_signature sigs[0];
+ };
+
+ typedef struct {
+- unsigned long seg;
++ unsigned long seg;
+ } mm_segment_t;
+
+
+@@ -492,7 +555,7 @@ extern int kernel_thread(int (*fn)(void
+ /* Free all resources held by a thread. */
+ extern void release_thread(struct task_struct *);
+
+-/* Prepare to copy thread state - unlazy all lazy status */
++/* Prepare to copy thread state - unlazy all lazy state */
+ extern void prepare_to_copy(struct task_struct *tsk);
+
+ unsigned long get_wchan(struct task_struct *p);
+@@ -529,118 +592,138 @@ static inline unsigned int cpuid_eax(uns
+ unsigned int eax, ebx, ecx, edx;
+
+ cpuid(op, &eax, &ebx, &ecx, &edx);
++
+ return eax;
+ }
++
+ static inline unsigned int cpuid_ebx(unsigned int op)
+ {
+ unsigned int eax, ebx, ecx, edx;
+
+ cpuid(op, &eax, &ebx, &ecx, &edx);
++
+ return ebx;
+ }
++
+ static inline unsigned int cpuid_ecx(unsigned int op)
+ {
+ unsigned int eax, ebx, ecx, edx;
+
+ cpuid(op, &eax, &ebx, &ecx, &edx);
++
+ return ecx;
+ }
++
+ static inline unsigned int cpuid_edx(unsigned int op)
+ {
+ unsigned int eax, ebx, ecx, edx;
+
+ cpuid(op, &eax, &ebx, &ecx, &edx);
++
+ return edx;
+ }
+
+ /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+ static inline void rep_nop(void)
+ {
+- __asm__ __volatile__("rep;nop": : :"memory");
++ asm volatile("rep; nop" ::: "memory");
+ }
+
+-/* Stop speculative execution */
++static inline void cpu_relax(void)
++{
++ rep_nop();
++}
++
++/* Stop speculative execution: */
+ static inline void sync_core(void)
+ {
+ int tmp;
++
+ asm volatile("cpuid" : "=a" (tmp) : "0" (1)
+- : "ebx", "ecx", "edx", "memory");
++ : "ebx", "ecx", "edx", "memory");
+ }
+
+-#define cpu_relax() rep_nop()
+-
+ static inline void __monitor(const void *eax, unsigned long ecx,
+- unsigned long edx)
++ unsigned long edx)
+ {
+- /* "monitor %eax,%ecx,%edx;" */
+- asm volatile(
+- ".byte 0x0f,0x01,0xc8;"
+- : :"a" (eax), "c" (ecx), "d"(edx));
++ /* "monitor %eax, %ecx, %edx;" */
++ asm volatile(".byte 0x0f, 0x01, 0xc8;"
++ :: "a" (eax), "c" (ecx), "d"(edx));
+ }
+
+ static inline void __mwait(unsigned long eax, unsigned long ecx)
+ {
+- /* "mwait %eax,%ecx;" */
+- asm volatile(
+- ".byte 0x0f,0x01,0xc9;"
+- : :"a" (eax), "c" (ecx));
++ /* "mwait %eax, %ecx;" */
++ asm volatile(".byte 0x0f, 0x01, 0xc9;"
++ :: "a" (eax), "c" (ecx));
+ }
+
+ static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
+ {
+- /* "mwait %eax,%ecx;" */
+- asm volatile(
+- "sti; .byte 0x0f,0x01,0xc9;"
+- : :"a" (eax), "c" (ecx));
++ trace_hardirqs_on();
++ /* "mwait %eax, %ecx;" */
++ asm volatile("sti; .byte 0x0f, 0x01, 0xc9;"
++ :: "a" (eax), "c" (ecx));
+ }
+
+ extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
+
+-extern int force_mwait;
++extern int force_mwait;
+
+ extern void select_idle_routine(const struct cpuinfo_x86 *c);
+
+-extern unsigned long boot_option_idle_override;
++extern unsigned long boot_option_idle_override;
+
+ extern void enable_sep_cpu(void);
+ extern int sysenter_setup(void);
+
+ /* Defined in head.S */
+-extern struct desc_ptr early_gdt_descr;
++extern struct desc_ptr early_gdt_descr;
+
+ extern void cpu_set_gdt(int);
+ extern void switch_to_new_gdt(void);
+ extern void cpu_init(void);
+ extern void init_gdt(int cpu);
+
+-/* from system description table in BIOS. Mostly for MCA use, but
+- * others may find it useful. */
+-extern unsigned int machine_id;
+-extern unsigned int machine_submodel_id;
+-extern unsigned int BIOS_revision;
++static inline void update_debugctlmsr(unsigned long debugctlmsr)
++{
++#ifndef CONFIG_X86_DEBUGCTLMSR
++ if (boot_cpu_data.x86 < 6)
++ return;
++#endif
++ wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr);
++}
+
+-/* Boot loader type from the setup header */
+-extern int bootloader_type;
++/*
++ * from system description table in BIOS. Mostly for MCA use, but
++ * others may find it useful:
++ */
++extern unsigned int machine_id;
++extern unsigned int machine_submodel_id;
++extern unsigned int BIOS_revision;
++
++/* Boot loader type from the setup header: */
++extern int bootloader_type;
+
+-extern char ignore_fpu_irq;
+-#define cache_line_size() (boot_cpu_data.x86_cache_alignment)
++extern char ignore_fpu_irq;
+
+ #define HAVE_ARCH_PICK_MMAP_LAYOUT 1
+ #define ARCH_HAS_PREFETCHW
+ #define ARCH_HAS_SPINLOCK_PREFETCH
+
+ #ifdef CONFIG_X86_32
+-#define BASE_PREFETCH ASM_NOP4
+-#define ARCH_HAS_PREFETCH
++# define BASE_PREFETCH ASM_NOP4
++# define ARCH_HAS_PREFETCH
+ #else
+-#define BASE_PREFETCH "prefetcht0 (%1)"
++# define BASE_PREFETCH "prefetcht0 (%1)"
+ #endif
+
+-/* Prefetch instructions for Pentium III and AMD Athlon */
+-/* It's not worth to care about 3dnow! prefetches for the K6
+- because they are microcoded there and very slow.
+- However we don't do prefetches for pre XP Athlons currently
+- That should be fixed. */
++/*
++ * Prefetch instructions for Pentium III (+) and AMD Athlon (+)
++ *
++ * It's not worth to care about 3dnow prefetches for the K6
++ * because they are microcoded there and very slow.
++ */
+ static inline void prefetch(const void *x)
+ {
+ alternative_input(BASE_PREFETCH,
+@@ -649,8 +732,11 @@ static inline void prefetch(const void *
+ "r" (x));
+ }
+
+-/* 3dnow! prefetch to get an exclusive cache line. Useful for
+- spinlocks to avoid one state transition in the cache coherency protocol. */
++/*
++ * 3dnow prefetch to get an exclusive cache line.
++ * Useful for spinlocks to avoid one state transition in the
++ * cache coherency protocol:
++ */
+ static inline void prefetchw(const void *x)
+ {
+ alternative_input(BASE_PREFETCH,
+@@ -659,21 +745,25 @@ static inline void prefetchw(const void
+ "r" (x));
+ }
+
+-#define spin_lock_prefetch(x) prefetchw(x)
++static inline void spin_lock_prefetch(const void *x)
++{
++ prefetchw(x);
++}
++
+ #ifdef CONFIG_X86_32
+ /*
+ * User space process size: 3GB (default).
+ */
+-#define TASK_SIZE (PAGE_OFFSET)
+-#define STACK_TOP TASK_SIZE
+-#define STACK_TOP_MAX STACK_TOP
+-
+-#define INIT_THREAD { \
+- .sp0 = sizeof(init_stack) + (long)&init_stack, \
+- .vm86_info = NULL, \
+- .sysenter_cs = __KERNEL_CS, \
+- .io_bitmap_ptr = NULL, \
+- .fs = __KERNEL_PERCPU, \
++#define TASK_SIZE PAGE_OFFSET
++#define STACK_TOP TASK_SIZE
++#define STACK_TOP_MAX STACK_TOP
++
++#define INIT_THREAD { \
++ .sp0 = sizeof(init_stack) + (long)&init_stack, \
++ .vm86_info = NULL, \
++ .sysenter_cs = __KERNEL_CS, \
++ .io_bitmap_ptr = NULL, \
++ .fs = __KERNEL_PERCPU, \
+ }
+
+ /*
+@@ -682,28 +772,15 @@ static inline void prefetchw(const void
+ * permission bitmap. The extra byte must be all 1 bits, and must
+ * be within the limit.
+ */
+-#define INIT_TSS { \
+- .x86_tss = { \
++#define INIT_TSS { \
++ .x86_tss = { \
+ .sp0 = sizeof(init_stack) + (long)&init_stack, \
+- .ss0 = __KERNEL_DS, \
+- .ss1 = __KERNEL_CS, \
+- .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
+- }, \
+- .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \
+-}
+-
+-#define start_thread(regs, new_eip, new_esp) do { \
+- __asm__("movl %0,%%gs": :"r" (0)); \
+- regs->fs = 0; \
+- set_fs(USER_DS); \
+- regs->ds = __USER_DS; \
+- regs->es = __USER_DS; \
+- regs->ss = __USER_DS; \
+- regs->cs = __USER_CS; \
+- regs->ip = new_eip; \
+- regs->sp = new_esp; \
+-} while (0)
+-
++ .ss0 = __KERNEL_DS, \
++ .ss1 = __KERNEL_CS, \
++ .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \
++ }, \
++ .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \
++}
+
+ extern unsigned long thread_saved_pc(struct task_struct *tsk);
+
+@@ -731,24 +808,24 @@ extern unsigned long thread_saved_pc(str
+ __regs__ - 1; \
+ })
+
+-#define KSTK_ESP(task) (task_pt_regs(task)->sp)
++#define KSTK_ESP(task) (task_pt_regs(task)->sp)
+
+ #else
+ /*
+ * User space process size. 47bits minus one guard page.
+ */
+-#define TASK_SIZE64 (0x800000000000UL - 4096)
++#define TASK_SIZE64 ((1UL << 47) - PAGE_SIZE)
+
+ /* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+-#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
+- 0xc0000000 : 0xFFFFe000)
++#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
++ 0xc0000000 : 0xFFFFe000)
+
+-#define TASK_SIZE (test_thread_flag(TIF_IA32) ? \
+- IA32_PAGE_OFFSET : TASK_SIZE64)
+-#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \
+- IA32_PAGE_OFFSET : TASK_SIZE64)
++#define TASK_SIZE (test_thread_flag(TIF_IA32) ? \
++ IA32_PAGE_OFFSET : TASK_SIZE64)
++#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \
++ IA32_PAGE_OFFSET : TASK_SIZE64)
+
+ #define STACK_TOP TASK_SIZE
+ #define STACK_TOP_MAX TASK_SIZE64
+@@ -761,33 +838,32 @@ extern unsigned long thread_saved_pc(str
+ .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+ }
+
+-#define start_thread(regs, new_rip, new_rsp) do { \
+- asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \
+- load_gs_index(0); \
+- (regs)->ip = (new_rip); \
+- (regs)->sp = (new_rsp); \
+- write_pda(oldrsp, (new_rsp)); \
+- (regs)->cs = __USER_CS; \
+- (regs)->ss = __USER_DS; \
+- (regs)->flags = 0x200; \
+- set_fs(USER_DS); \
+-} while (0)
+-
+ /*
+ * Return saved PC of a blocked thread.
+ * What is this good for? it will be always the scheduler or ret_from_fork.
+ */
+-#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
++#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
+
+-#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
+-#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
++#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
++#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
+ #endif /* CONFIG_X86_64 */
+
+-/* This decides where the kernel will search for a free chunk of vm
++extern void start_thread(struct pt_regs *regs, unsigned long new_ip,
++ unsigned long new_sp);
++
++/*
++ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+ #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
+
+-#define KSTK_EIP(task) (task_pt_regs(task)->ip)
++#define KSTK_EIP(task) (task_pt_regs(task)->ip)
++
++/* Get/set a process' ability to use the timestamp counter instruction */
++#define GET_TSC_CTL(adr) get_tsc_mode((adr))
++#define SET_TSC_CTL(val) set_tsc_mode((val))
++
++extern int get_tsc_mode(unsigned long adr);
++extern int set_tsc_mode(unsigned int val);
+
+ #endif
+--- a/include/asm-x86/mach-xen/asm/segment.h
++++ b/include/asm-x86/mach-xen/asm/segment.h
+@@ -191,13 +191,14 @@
+ #define SEGMENT_TI_MASK 0x4
+
+ #define IDT_ENTRIES 256
++#define NUM_EXCEPTION_VECTORS 32
+ #define GDT_SIZE (GDT_ENTRIES * 8)
+ #define GDT_ENTRY_TLS_ENTRIES 3
+ #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
+
+ #ifdef __KERNEL__
+ #ifndef __ASSEMBLY__
+-extern const char early_idt_handlers[IDT_ENTRIES][10];
++extern const char early_idt_handlers[NUM_EXCEPTION_VECTORS][10];
+ #endif
+ #endif
+
+--- a/include/asm-x86/mach-xen/asm/smp_32.h
++++ /dev/null
+@@ -1,178 +0,0 @@
+-#ifndef __ASM_SMP_H
+-#define __ASM_SMP_H
+-
+-#ifndef __ASSEMBLY__
+-#include <linux/cpumask.h>
+-#include <linux/init.h>
+-
+-/*
+- * We need the APIC definitions automatically as part of 'smp.h'
+- */
+-#ifdef CONFIG_X86_LOCAL_APIC
+-# include <asm/mpspec.h>
+-# include <asm/apic.h>
+-# ifdef CONFIG_X86_IO_APIC
+-# include <asm/io_apic.h>
+-# endif
+-#endif
+-
+-#define cpu_callout_map cpu_possible_map
+-#define cpu_callin_map cpu_possible_map
+-
+-extern int smp_num_siblings;
+-extern unsigned int num_processors;
+-
+-extern void smp_alloc_memory(void);
+-extern void lock_ipi_call_lock(void);
+-extern void unlock_ipi_call_lock(void);
+-
+-extern void (*mtrr_hook) (void);
+-extern void zap_low_mappings (void);
+-
+-DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
+-DECLARE_PER_CPU(cpumask_t, cpu_core_map);
+-DECLARE_PER_CPU(u8, cpu_llc_id);
+-DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
+-
+-#ifdef CONFIG_HOTPLUG_CPU
+-extern void cpu_exit_clear(void);
+-extern void cpu_uninit(void);
+-#endif
+-
+-#ifdef CONFIG_SMP
+-
+-#ifndef CONFIG_XEN
+-
+-/* Globals due to paravirt */
+-extern void set_cpu_sibling_map(int cpu);
+-
+-struct smp_ops
+-{
+- void (*smp_prepare_boot_cpu)(void);
+- void (*smp_prepare_cpus)(unsigned max_cpus);
+- int (*cpu_up)(unsigned cpu);
+- void (*smp_cpus_done)(unsigned max_cpus);
+-
+- void (*smp_send_stop)(void);
+- void (*smp_send_reschedule)(int cpu);
+- int (*smp_call_function_mask)(cpumask_t mask,
+- void (*func)(void *info), void *info,
+- int wait);
+-};
+-
+-extern struct smp_ops smp_ops;
+-
+-static inline void smp_prepare_boot_cpu(void)
+-{
+- smp_ops.smp_prepare_boot_cpu();
+-}
+-static inline void smp_prepare_cpus(unsigned int max_cpus)
+-{
+- smp_ops.smp_prepare_cpus(max_cpus);
+-}
+-static inline int __cpu_up(unsigned int cpu)
+-{
+- return smp_ops.cpu_up(cpu);
+-}
+-static inline void smp_cpus_done(unsigned int max_cpus)
+-{
+- smp_ops.smp_cpus_done(max_cpus);
+-}
+-
+-static inline void smp_send_stop(void)
+-{
+- smp_ops.smp_send_stop();
+-}
+-static inline void smp_send_reschedule(int cpu)
+-{
+- smp_ops.smp_send_reschedule(cpu);
+-}
+-static inline int smp_call_function_mask(cpumask_t mask,
+- void (*func) (void *info), void *info,
+- int wait)
+-{
+- return smp_ops.smp_call_function_mask(mask, func, info, wait);
+-}
+-
+-void native_smp_prepare_boot_cpu(void);
+-void native_smp_prepare_cpus(unsigned int max_cpus);
+-int native_cpu_up(unsigned int cpunum);
+-void native_smp_cpus_done(unsigned int max_cpus);
+-
+-#ifndef CONFIG_PARAVIRT
+-#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
+-#endif
+-
+-#else /* CONFIG_XEN */
+-
+-void xen_smp_send_stop(void);
+-void xen_smp_send_reschedule(int cpu);
+-int xen_smp_call_function_mask(cpumask_t mask,
+- void (*func) (void *info), void *info,
+- int wait);
+-
+-#define smp_send_stop xen_smp_send_stop
+-#define smp_send_reschedule xen_smp_send_reschedule
+-#define smp_call_function_mask xen_smp_call_function_mask
+-
+-extern void prefill_possible_map(void);
+-
+-#endif /* CONFIG_XEN */
+-
+-extern int __cpu_disable(void);
+-extern void __cpu_die(unsigned int cpu);
+-
+-/*
+- * This function is needed by all SMP systems. It must _always_ be valid
+- * from the initial startup. We map APIC_BASE very early in page_setup(),
+- * so this is correct in the x86 case.
+- */
+-DECLARE_PER_CPU(int, cpu_number);
+-#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
+-
+-#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
+-
+-#define safe_smp_processor_id() smp_processor_id()
+-
+-/* We don't mark CPUs online until __cpu_up(), so we need another measure */
+-static inline int num_booting_cpus(void)
+-{
+- return cpus_weight(cpu_callout_map);
+-}
+-
+-#else /* CONFIG_SMP */
+-
+-#define safe_smp_processor_id() 0
+-#define cpu_physical_id(cpu) boot_cpu_physical_apicid
+-
+-#endif /* !CONFIG_SMP */
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+-
+-static __inline int logical_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
+-}
+-
+-# ifdef APIC_DEFINITION
+-extern int hard_smp_processor_id(void);
+-# else
+-# include <mach_apicdef.h>
+-static inline int hard_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
+-}
+-# endif /* APIC_DEFINITION */
+-
+-#else /* CONFIG_X86_LOCAL_APIC */
+-
+-# ifndef CONFIG_SMP
+-# define hard_smp_processor_id() 0
+-# endif
+-
+-#endif /* CONFIG_X86_LOCAL_APIC */
+-
+-#endif /* !ASSEMBLY */
+-#endif
+--- a/include/asm-x86/mach-xen/asm/smp_64.h
++++ /dev/null
+@@ -1,103 +0,0 @@
+-#ifndef __ASM_SMP_H
+-#define __ASM_SMP_H
+-
+-#include <linux/cpumask.h>
+-#include <linux/init.h>
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+-/*
+- * We need the APIC definitions automatically as part of 'smp.h'
+- */
+-#include <asm/apic.h>
+-#ifdef CONFIG_X86_IO_APIC
+-#include <asm/io_apic.h>
+-#endif
+-#include <asm/mpspec.h>
+-#endif
+-#include <asm/pda.h>
+-#include <asm/thread_info.h>
+-
+-extern cpumask_t cpu_initialized;
+-
+-extern int smp_num_siblings;
+-extern unsigned int num_processors;
+-
+-extern void smp_alloc_memory(void);
+-extern void lock_ipi_call_lock(void);
+-extern void unlock_ipi_call_lock(void);
+-
+-extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
+- void *info, int wait);
+-
+-DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
+-DECLARE_PER_CPU(cpumask_t, cpu_core_map);
+-DECLARE_PER_CPU(u16, cpu_llc_id);
+-DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
+-DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+-static inline int cpu_present_to_apicid(int mps_cpu)
+-{
+- if (cpu_present(mps_cpu))
+- return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
+- else
+- return BAD_APICID;
+-}
+-#endif
+-
+-#ifdef CONFIG_SMP
+-
+-#define SMP_TRAMPOLINE_BASE 0x6000
+-
+-extern int __cpu_disable(void);
+-extern void __cpu_die(unsigned int cpu);
+-extern void prefill_possible_map(void);
+-extern unsigned __cpuinitdata disabled_cpus;
+-
+-#define raw_smp_processor_id() read_pda(cpunumber)
+-#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
+-
+-#define stack_smp_processor_id() \
+- ({ \
+- struct thread_info *ti; \
+- __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
+- ti->cpu; \
+-})
+-
+-/*
+- * On x86 all CPUs are mapped 1:1 to the APIC space. This simplifies
+- * scheduling and IPI sending and compresses data structures.
+- */
+-static inline int num_booting_cpus(void)
+-{
+- return cpus_weight(cpu_possible_map);
+-}
+-
+-extern void smp_send_reschedule(int cpu);
+-
+-#else /* CONFIG_SMP */
+-
+-extern unsigned int boot_cpu_id;
+-#define cpu_physical_id(cpu) boot_cpu_id
+-#define stack_smp_processor_id() 0
+-
+-#endif /* !CONFIG_SMP */
+-
+-#define safe_smp_processor_id() smp_processor_id()
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+-static __inline int logical_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
+-}
+-
+-static inline int hard_smp_processor_id(void)
+-{
+- /* we don't want to mark this access volatile - bad code generation */
+- return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
+-}
+-#endif
+-
+-#endif
+-
+--- a/include/asm-x86/mach-xen/asm/smp.h
++++ b/include/asm-x86/mach-xen/asm/smp.h
+@@ -1,5 +1,227 @@
+-#ifdef CONFIG_X86_32
+-# include "smp_32.h"
++#ifndef _ASM_X86_SMP_H_
++#define _ASM_X86_SMP_H_
++#ifndef __ASSEMBLY__
++#include <linux/cpumask.h>
++#include <linux/init.h>
++#include <asm/percpu.h>
++
++/*
++ * We need the APIC definitions automatically as part of 'smp.h'
++ */
++#ifdef CONFIG_X86_LOCAL_APIC
++# include <asm/mpspec.h>
++# include <asm/apic.h>
++# ifdef CONFIG_X86_IO_APIC
++# include <asm/io_apic.h>
++# endif
++#endif
++#include <asm/pda.h>
++#include <asm/thread_info.h>
++
++#define cpu_callout_map cpu_possible_map
++extern cpumask_t cpu_initialized;
++#define cpu_callin_map cpu_possible_map
++
++extern void (*mtrr_hook)(void);
++extern void zap_low_mappings(void);
++
++extern int smp_num_siblings;
++extern unsigned int num_processors;
++extern cpumask_t cpu_initialized;
++
++#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
++extern u16 x86_cpu_to_apicid_init[];
++extern u16 x86_bios_cpu_apicid_init[];
++extern void *x86_cpu_to_apicid_early_ptr;
++extern void *x86_bios_cpu_apicid_early_ptr;
+ #else
+-# include "smp_64.h"
++#define x86_cpu_to_apicid_early_ptr NULL
++#define x86_bios_cpu_apicid_early_ptr NULL
++#endif
++
++DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
++DECLARE_PER_CPU(cpumask_t, cpu_core_map);
++DECLARE_PER_CPU(u16, cpu_llc_id);
++DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
++DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
++
++#ifdef CONFIG_SMP
++
++#ifndef CONFIG_XEN
++
++/* Static state in head.S used to set up a CPU */
++extern struct {
++ void *sp;
++ unsigned short ss;
++} stack_start;
++
++struct smp_ops {
++ void (*smp_prepare_boot_cpu)(void);
++ void (*smp_prepare_cpus)(unsigned max_cpus);
++ int (*cpu_up)(unsigned cpu);
++ void (*smp_cpus_done)(unsigned max_cpus);
++
++ void (*smp_send_stop)(void);
++ void (*smp_send_reschedule)(int cpu);
++ int (*smp_call_function_mask)(cpumask_t mask,
++ void (*func)(void *info), void *info,
++ int wait);
++};
++
++/* Globals due to paravirt */
++extern void set_cpu_sibling_map(int cpu);
++
++#ifndef CONFIG_PARAVIRT
++#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
++#endif
++extern struct smp_ops smp_ops;
++
++static inline void smp_send_stop(void)
++{
++ smp_ops.smp_send_stop();
++}
++
++static inline void smp_prepare_boot_cpu(void)
++{
++ smp_ops.smp_prepare_boot_cpu();
++}
++
++static inline void smp_prepare_cpus(unsigned int max_cpus)
++{
++ smp_ops.smp_prepare_cpus(max_cpus);
++}
++
++static inline void smp_cpus_done(unsigned int max_cpus)
++{
++ smp_ops.smp_cpus_done(max_cpus);
++}
++
++static inline int __cpu_up(unsigned int cpu)
++{
++ return smp_ops.cpu_up(cpu);
++}
++
++static inline void smp_send_reschedule(int cpu)
++{
++ smp_ops.smp_send_reschedule(cpu);
++}
++
++static inline int smp_call_function_mask(cpumask_t mask,
++ void (*func) (void *info), void *info,
++ int wait)
++{
++ return smp_ops.smp_call_function_mask(mask, func, info, wait);
++}
++
++void native_smp_prepare_boot_cpu(void);
++void native_smp_prepare_cpus(unsigned int max_cpus);
++void native_smp_cpus_done(unsigned int max_cpus);
++int native_cpu_up(unsigned int cpunum);
++
++#else /* CONFIG_XEN */
++
++void xen_smp_send_stop(void);
++void xen_smp_send_reschedule(int cpu);
++int xen_smp_call_function_mask(cpumask_t mask,
++ void (*func) (void *info), void *info,
++ int wait);
++
++#define smp_send_stop xen_smp_send_stop
++#define smp_send_reschedule xen_smp_send_reschedule
++#define smp_call_function_mask xen_smp_call_function_mask
++
++extern void prefill_possible_map(void);
++
++#endif /* CONFIG_XEN */
++
++extern int __cpu_disable(void);
++extern void __cpu_die(unsigned int cpu);
++
++extern void prefill_possible_map(void);
++
++void smp_store_cpu_info(int id);
++#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
++
++/* We don't mark CPUs online until __cpu_up(), so we need another measure */
++static inline int num_booting_cpus(void)
++{
++ return cpus_weight(cpu_callout_map);
++}
++#endif /* CONFIG_SMP */
++
++extern unsigned disabled_cpus __cpuinitdata;
++
++#ifdef CONFIG_X86_32_SMP
++/*
++ * This function is needed by all SMP systems. It must _always_ be valid
++ * from the initial startup. We map APIC_BASE very early in page_setup(),
++ * so this is correct in the x86 case.
++ */
++DECLARE_PER_CPU(int, cpu_number);
++#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
++#define safe_smp_processor_id() smp_processor_id()
++
++#elif defined(CONFIG_X86_64_SMP)
++#define raw_smp_processor_id() read_pda(cpunumber)
++
++#define stack_smp_processor_id() \
++({ \
++ struct thread_info *ti; \
++ __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
++ ti->cpu; \
++})
++#define safe_smp_processor_id() smp_processor_id()
++
++#else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
++#define cpu_physical_id(cpu) boot_cpu_physical_apicid
++#define safe_smp_processor_id() 0
++#define stack_smp_processor_id() 0
++#endif
++
++#ifdef CONFIG_X86_LOCAL_APIC
++
++static inline int logical_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
++}
++
++#ifndef CONFIG_X86_64
++static inline unsigned int read_apic_id(void)
++{
++ return *(u32 *)(APIC_BASE + APIC_ID);
++}
++#else
++extern unsigned int read_apic_id(void);
++#endif
++
++
++# ifdef APIC_DEFINITION
++extern int hard_smp_processor_id(void);
++# else
++# include <mach_apicdef.h>
++static inline int hard_smp_processor_id(void)
++{
++ /* we don't want to mark this access volatile - bad code generation */
++ return GET_APIC_ID(read_apic_id());
++}
++# endif /* APIC_DEFINITION */
++
++#else /* CONFIG_X86_LOCAL_APIC */
++
++# ifndef CONFIG_SMP
++# define hard_smp_processor_id() 0
++# endif
++
++#endif /* CONFIG_X86_LOCAL_APIC */
++
++#ifdef CONFIG_HOTPLUG_CPU
++extern void cpu_exit_clear(void);
++extern void cpu_uninit(void);
++#endif
++
++extern void smp_alloc_memory(void);
++extern void lock_ipi_call_lock(void);
++extern void unlock_ipi_call_lock(void);
++#endif /* __ASSEMBLY__ */
+ #endif
+--- a/include/asm-x86/mach-xen/asm/spinlock.h
++++ b/include/asm-x86/mach-xen/asm/spinlock.h
+@@ -88,7 +88,7 @@ extern void xen_spin_kick(raw_spinlock_t
+ : "memory", "cc")
+
+
+-static inline int __raw_spin_trylock(raw_spinlock_t *lock)
++static __always_inline int __raw_spin_trylock(raw_spinlock_t *lock)
+ {
+ int tmp, new;
+
+@@ -107,7 +107,7 @@ static inline int __raw_spin_trylock(raw
+ return tmp;
+ }
+
+-static inline void __raw_spin_unlock(raw_spinlock_t *lock)
++static __always_inline void __raw_spin_unlock(raw_spinlock_t *lock)
+ {
+ unsigned int token;
+ unsigned char kick;
+@@ -155,7 +155,7 @@ static inline void __raw_spin_unlock(raw
+ : "memory", "cc"); \
+ } while (0)
+
+-static inline int __raw_spin_trylock(raw_spinlock_t *lock)
++static __always_inline int __raw_spin_trylock(raw_spinlock_t *lock)
+ {
+ int tmp;
+ int new;
+@@ -177,7 +177,7 @@ static inline int __raw_spin_trylock(raw
+ return tmp;
+ }
+
+-static inline void __raw_spin_unlock(raw_spinlock_t *lock)
++static __always_inline void __raw_spin_unlock(raw_spinlock_t *lock)
+ {
+ unsigned int token, tmp;
+ bool kick;
+@@ -197,19 +197,19 @@ static inline void __raw_spin_unlock(raw
+
+ static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
+ {
+- int tmp = *(volatile signed int *)(&(lock)->slock);
++ int tmp = ACCESS_ONCE(lock->slock);
+
+ return !!(((tmp >> TICKET_SHIFT) ^ tmp) & ((1 << TICKET_SHIFT) - 1));
+ }
+
+ static inline int __raw_spin_is_contended(raw_spinlock_t *lock)
+ {
+- int tmp = *(volatile signed int *)(&(lock)->slock);
++ int tmp = ACCESS_ONCE(lock->slock);
+
+ return (((tmp >> TICKET_SHIFT) - tmp) & ((1 << TICKET_SHIFT) - 1)) > 1;
+ }
+
+-static inline void __raw_spin_lock(raw_spinlock_t *lock)
++static __always_inline void __raw_spin_lock(raw_spinlock_t *lock)
+ {
+ unsigned int token, count;
+ bool free;
+@@ -223,8 +223,8 @@ static inline void __raw_spin_lock(raw_s
+ } while (unlikely(!count) && !xen_spin_wait(lock, token));
+ }
+
+-static inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
+- unsigned long flags)
++static __always_inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
++ unsigned long flags)
+ {
+ unsigned int token, count;
+ bool free;
+--- a/include/asm-x86/mach-xen/asm/swiotlb_32.h
++++ /dev/null
+@@ -1,43 +0,0 @@
+-#ifndef _ASM_SWIOTLB_H
+-#define _ASM_SWIOTLB_H 1
+-
+-/* SWIOTLB interface */
+-
+-extern dma_addr_t swiotlb_map_single(struct device *hwdev, void *ptr, size_t size,
+- int dir);
+-extern void swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
+- size_t size, int dir);
+-extern void swiotlb_sync_single_for_cpu(struct device *hwdev,
+- dma_addr_t dev_addr,
+- size_t size, int dir);
+-extern void swiotlb_sync_single_for_device(struct device *hwdev,
+- dma_addr_t dev_addr,
+- size_t size, int dir);
+-extern void swiotlb_sync_sg_for_cpu(struct device *hwdev,
+- struct scatterlist *sg, int nelems,
+- int dir);
+-extern void swiotlb_sync_sg_for_device(struct device *hwdev,
+- struct scatterlist *sg, int nelems,
+- int dir);
+-extern int swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg,
+- int nents, int direction);
+-extern void swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg,
+- int nents, int direction);
+-extern int swiotlb_dma_mapping_error(dma_addr_t dma_addr);
+-#ifdef CONFIG_HIGHMEM
+-extern dma_addr_t swiotlb_map_page(struct device *hwdev, struct page *page,
+- unsigned long offset, size_t size,
+- enum dma_data_direction direction);
+-extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dma_address,
+- size_t size, enum dma_data_direction direction);
+-#endif
+-extern int swiotlb_dma_supported(struct device *hwdev, u64 mask);
+-extern void swiotlb_init(void);
+-
+-#ifdef CONFIG_SWIOTLB
+-extern int swiotlb;
+-#else
+-#define swiotlb 0
+-#endif
+-
+-#endif
+--- a/include/asm-x86/mach-xen/asm/swiotlb.h
++++ b/include/asm-x86/mach-xen/asm/swiotlb.h
+@@ -1,5 +1,8 @@
+-#ifdef CONFIG_X86_32
+-# include "swiotlb_32.h"
+-#else
+-# include "../../swiotlb.h"
+-#endif
++#ifndef _ASM_SWIOTLB_H
++
++#include "../../swiotlb.h"
++
++dma_addr_t swiotlb_map_single_phys(struct device *, phys_addr_t, size_t size,
++ int dir);
++
++#endif /* _ASM_SWIOTLB_H */
+--- a/include/asm-x86/mach-xen/asm/system.h
++++ b/include/asm-x86/mach-xen/asm/system.h
+@@ -28,22 +28,44 @@ struct task_struct *__switch_to(struct t
+ * Saving eflags is important. It switches not only IOPL between tasks,
+ * it also protects other tasks from NT leaking through sysenter etc.
+ */
+-#define switch_to(prev, next, last) do { \
+- unsigned long esi, edi; \
+- asm volatile("pushfl\n\t" /* Save flags */ \
+- "pushl %%ebp\n\t" \
+- "movl %%esp,%0\n\t" /* save ESP */ \
+- "movl %5,%%esp\n\t" /* restore ESP */ \
+- "movl $1f,%1\n\t" /* save EIP */ \
+- "pushl %6\n\t" /* restore EIP */ \
+- "jmp __switch_to\n" \
++#define switch_to(prev, next, last) \
++do { \
++ /* \
++ * Context-switching clobbers all registers, so we clobber \
++ * them explicitly, via unused output variables. \
++ * (EAX and EBP is not listed because EBP is saved/restored \
++ * explicitly for wchan access and EAX is the return value of \
++ * __switch_to()) \
++ */ \
++ unsigned long ebx, ecx, edx, esi, edi; \
++ \
++ asm volatile("pushfl\n\t" /* save flags */ \
++ "pushl %%ebp\n\t" /* save EBP */ \
++ "movl %%esp,%[prev_sp]\n\t" /* save ESP */ \
++ "movl %[next_sp],%%esp\n\t" /* restore ESP */ \
++ "movl $1f,%[prev_ip]\n\t" /* save EIP */ \
++ "pushl %[next_ip]\n\t" /* restore EIP */ \
++ "jmp __switch_to\n" /* regparm call */ \
+ "1:\t" \
+- "popl %%ebp\n\t" \
+- "popfl" \
+- :"=m" (prev->thread.sp), "=m" (prev->thread.ip), \
+- "=a" (last), "=S" (esi), "=D" (edi) \
+- :"m" (next->thread.sp), "m" (next->thread.ip), \
+- "2" (prev), "d" (next)); \
++ "popl %%ebp\n\t" /* restore EBP */ \
++ "popfl\n" /* restore flags */ \
++ \
++ /* output parameters */ \
++ : [prev_sp] "=m" (prev->thread.sp), \
++ [prev_ip] "=m" (prev->thread.ip), \
++ "=a" (last), \
++ \
++ /* clobbered output registers: */ \
++ "=b" (ebx), "=c" (ecx), "=d" (edx), \
++ "=S" (esi), "=D" (edi) \
++ \
++ /* input parameters: */ \
++ : [next_sp] "m" (next->thread.sp), \
++ [next_ip] "m" (next->thread.ip), \
++ \
++ /* regparm parameters for __switch_to(): */ \
++ [prev] "a" (prev), \
++ [next] "d" (next)); \
+ } while (0)
+
+ /*
+@@ -123,30 +145,29 @@ extern void load_gs_index(unsigned);
+ */
+ #define loadsegment(seg, value) \
+ asm volatile("\n" \
+- "1:\t" \
+- "movl %k0,%%" #seg "\n" \
+- "2:\n" \
+- ".section .fixup,\"ax\"\n" \
+- "3:\t" \
+- "movl %k1, %%" #seg "\n\t" \
+- "jmp 2b\n" \
+- ".previous\n" \
+- _ASM_EXTABLE(1b,3b) \
+- : :"r" (value), "r" (0))
++ "1:\t" \
++ "movl %k0,%%" #seg "\n" \
++ "2:\n" \
++ ".section .fixup,\"ax\"\n" \
++ "3:\t" \
++ "movl %k1, %%" #seg "\n\t" \
++ "jmp 2b\n" \
++ ".previous\n" \
++ _ASM_EXTABLE(1b,3b) \
++ : :"r" (value), "r" (0))
+
+
+ /*
+ * Save a segment register away
+ */
+-#define savesegment(seg, value) \
++#define savesegment(seg, value) \
+ asm volatile("mov %%" #seg ",%0":"=rm" (value))
+
+ static inline unsigned long get_limit(unsigned long segment)
+ {
+ unsigned long __limit;
+- __asm__("lsll %1,%0"
+- :"=r" (__limit):"r" (segment));
+- return __limit+1;
++ asm("lsll %1,%0" : "=r" (__limit) : "r" (segment));
++ return __limit + 1;
+ }
+
+ static inline void xen_clts(void)
+@@ -171,13 +192,13 @@ static unsigned long __force_order;
+ static inline unsigned long xen_read_cr0(void)
+ {
+ unsigned long val;
+- asm volatile("mov %%cr0,%0\n\t" :"=r" (val), "=m" (__force_order));
++ asm volatile("mov %%cr0,%0\n\t" : "=r" (val), "=m" (__force_order));
+ return val;
+ }
+
+ static inline void xen_write_cr0(unsigned long val)
+ {
+- asm volatile("mov %0,%%cr0": :"r" (val), "m" (__force_order));
++ asm volatile("mov %0,%%cr0": : "r" (val), "m" (__force_order));
+ }
+
+ #define xen_read_cr2() (current_vcpu_info()->arch.cr2)
+@@ -186,7 +207,7 @@ static inline void xen_write_cr0(unsigne
+ static inline unsigned long xen_read_cr3(void)
+ {
+ unsigned long val;
+- asm volatile("mov %%cr3,%0\n\t" :"=r" (val), "=m" (__force_order));
++ asm volatile("mov %%cr3,%0\n\t" : "=r" (val), "=m" (__force_order));
+ #ifdef CONFIG_X86_32
+ return mfn_to_pfn(xen_cr3_to_pfn(val)) << PAGE_SHIFT;
+ #else
+@@ -201,13 +222,13 @@ static inline void xen_write_cr3(unsigne
+ #else
+ val = phys_to_machine(val);
+ #endif
+- asm volatile("mov %0,%%cr3": :"r" (val), "m" (__force_order));
++ asm volatile("mov %0,%%cr3": : "r" (val), "m" (__force_order));
+ }
+
+ static inline unsigned long xen_read_cr4(void)
+ {
+ unsigned long val;
+- asm volatile("mov %%cr4,%0\n\t" :"=r" (val), "=m" (__force_order));
++ asm volatile("mov %%cr4,%0\n\t" : "=r" (val), "=m" (__force_order));
+ return val;
+ }
+
+@@ -215,7 +236,7 @@ static inline unsigned long xen_read_cr4
+
+ static inline void xen_write_cr4(unsigned long val)
+ {
+- asm volatile("mov %0,%%cr4": :"r" (val), "m" (__force_order));
++ asm volatile("mov %0,%%cr4": : "r" (val), "m" (__force_order));
+ }
+
+ #ifdef CONFIG_X86_64
+@@ -234,6 +255,7 @@ static inline void xen_wbinvd(void)
+ {
+ asm volatile("wbinvd": : :"memory");
+ }
++
+ #define read_cr0() (xen_read_cr0())
+ #define write_cr0(x) (xen_write_cr0(x))
+ #define read_cr2() (xen_read_cr2())
+@@ -260,7 +282,7 @@ static inline void clflush(volatile void
+ asm volatile("clflush %0" : "+m" (*(volatile char __force *)__p));
+ }
+
+-#define nop() __asm__ __volatile__ ("nop")
++#define nop() asm volatile ("nop")
+
+ void disable_hlt(void);
+ void enable_hlt(void);
+@@ -280,16 +302,7 @@ void default_idle(void);
+ */
+ #ifdef CONFIG_X86_32
+ /*
+- * For now, "wmb()" doesn't actually do anything, as all
+- * Intel CPU's follow what Intel calls a *Processor Order*,
+- * in which all writes are seen in the program order even
+- * outside the CPU.
+- *
+- * I expect future Intel CPU's to have a weaker ordering,
+- * but I'd also expect them to finally get their act together
+- * and add some real memory barriers if so.
+- *
+- * Some non intel clones support out of order store. wmb() ceases to be a
++ * Some non-Intel clones support out of order store. wmb() ceases to be a
+ * nop for these.
+ */
+ #define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
+@@ -368,7 +381,7 @@ void default_idle(void);
+ # define smp_wmb() barrier()
+ #endif
+ #define smp_read_barrier_depends() read_barrier_depends()
+-#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
++#define set_mb(var, value) do { (void)xchg(&var, value); } while (0)
+ #else
+ #define smp_mb() barrier()
+ #define smp_rmb() barrier()
+--- a/include/asm-x86/mach-xen/asm/tlbflush.h
++++ b/include/asm-x86/mach-xen/asm/tlbflush.h
+@@ -86,8 +86,7 @@ static inline void flush_tlb_range(struc
+ #define TLBSTATE_LAZY 2
+
+ #ifdef CONFIG_X86_32
+-struct tlb_state
+-{
++struct tlb_state {
+ struct mm_struct *active_mm;
+ int state;
+ char __cacheline_padding[L1_CACHE_BYTES-8];
+--- a/include/asm-x86/mach-xen/asm/vga.h
++++ b/include/asm-x86/mach-xen/asm/vga.h
+@@ -12,9 +12,9 @@
+ * access the videoram directly without any black magic.
+ */
+
+-#define VGA_MAP_MEM(x,s) (unsigned long)isa_bus_to_virt(x)
++#define VGA_MAP_MEM(x, s) (unsigned long)isa_bus_to_virt(x)
+
+ #define vga_readb(x) (*(x))
+-#define vga_writeb(x,y) (*(y) = (x))
++#define vga_writeb(x, y) (*(y) = (x))
+
+ #endif
+--- a/include/asm-x86/mach-xen/asm/xor_64.h
++++ b/include/asm-x86/mach-xen/asm/xor_64.h
+@@ -1,20 +1,23 @@
+ /*
+- * x86-64 changes / gcc fixes from Andi Kleen.
++ * x86-64 changes / gcc fixes from Andi Kleen.
+ * Copyright 2002 Andi Kleen, SuSE Labs.
+ *
+ * This hasn't been optimized for the hammer yet, but there are likely
+ * no advantages to be gotten from x86-64 here anyways.
+ */
+
+-typedef struct { unsigned long a,b; } __attribute__((aligned(16))) xmm_store_t;
++typedef struct {
++ unsigned long a, b;
++} __attribute__((aligned(16))) xmm_store_t;
+
+-/* Doesn't use gcc to save the XMM registers, because there is no easy way to
++/* Doesn't use gcc to save the XMM registers, because there is no easy way to
+ tell it to do a clts before the register saving. */
+-#define XMMS_SAVE do { \
++#define XMMS_SAVE \
++do { \
+ preempt_disable(); \
+ if (!(current_thread_info()->status & TS_USEDFPU)) \
+ clts(); \
+- __asm__ __volatile__ ( \
++ asm volatile( \
+ "movups %%xmm0,(%1) ;\n\t" \
+ "movups %%xmm1,0x10(%1) ;\n\t" \
+ "movups %%xmm2,0x20(%1) ;\n\t" \
+@@ -22,10 +25,11 @@ typedef struct { unsigned long a,b; } __
+ : "=&r" (cr0) \
+ : "r" (xmm_save) \
+ : "memory"); \
+-} while(0)
++} while (0)
+
+-#define XMMS_RESTORE do { \
+- asm volatile ( \
++#define XMMS_RESTORE \
++do { \
++ asm volatile( \
+ "sfence ;\n\t" \
+ "movups (%1),%%xmm0 ;\n\t" \
+ "movups 0x10(%1),%%xmm1 ;\n\t" \
+@@ -37,72 +41,72 @@ typedef struct { unsigned long a,b; } __
+ if (!(current_thread_info()->status & TS_USEDFPU)) \
+ stts(); \
+ preempt_enable(); \
+-} while(0)
++} while (0)
+
+ #define OFFS(x) "16*("#x")"
+ #define PF_OFFS(x) "256+16*("#x")"
+ #define PF0(x) " prefetchnta "PF_OFFS(x)"(%[p1]) ;\n"
+-#define LD(x,y) " movaps "OFFS(x)"(%[p1]), %%xmm"#y" ;\n"
+-#define ST(x,y) " movaps %%xmm"#y", "OFFS(x)"(%[p1]) ;\n"
++#define LD(x, y) " movaps "OFFS(x)"(%[p1]), %%xmm"#y" ;\n"
++#define ST(x, y) " movaps %%xmm"#y", "OFFS(x)"(%[p1]) ;\n"
+ #define PF1(x) " prefetchnta "PF_OFFS(x)"(%[p2]) ;\n"
+ #define PF2(x) " prefetchnta "PF_OFFS(x)"(%[p3]) ;\n"
+ #define PF3(x) " prefetchnta "PF_OFFS(x)"(%[p4]) ;\n"
+ #define PF4(x) " prefetchnta "PF_OFFS(x)"(%[p5]) ;\n"
+ #define PF5(x) " prefetchnta "PF_OFFS(x)"(%[p6]) ;\n"
+-#define XO1(x,y) " xorps "OFFS(x)"(%[p2]), %%xmm"#y" ;\n"
+-#define XO2(x,y) " xorps "OFFS(x)"(%[p3]), %%xmm"#y" ;\n"
+-#define XO3(x,y) " xorps "OFFS(x)"(%[p4]), %%xmm"#y" ;\n"
+-#define XO4(x,y) " xorps "OFFS(x)"(%[p5]), %%xmm"#y" ;\n"
+-#define XO5(x,y) " xorps "OFFS(x)"(%[p6]), %%xmm"#y" ;\n"
++#define XO1(x, y) " xorps "OFFS(x)"(%[p2]), %%xmm"#y" ;\n"
++#define XO2(x, y) " xorps "OFFS(x)"(%[p3]), %%xmm"#y" ;\n"
++#define XO3(x, y) " xorps "OFFS(x)"(%[p4]), %%xmm"#y" ;\n"
++#define XO4(x, y) " xorps "OFFS(x)"(%[p5]), %%xmm"#y" ;\n"
++#define XO5(x, y) " xorps "OFFS(x)"(%[p6]), %%xmm"#y" ;\n"
+
+
+ static void
+ xor_sse_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
+ {
+- unsigned int lines = bytes >> 8;
++ unsigned int lines = bytes >> 8;
+ unsigned long cr0;
+ xmm_store_t xmm_save[4];
+
+ XMMS_SAVE;
+
+- asm volatile (
++ asm volatile(
+ #undef BLOCK
+ #define BLOCK(i) \
+- LD(i,0) \
+- LD(i+1,1) \
++ LD(i, 0) \
++ LD(i + 1, 1) \
+ PF1(i) \
+- PF1(i+2) \
+- LD(i+2,2) \
+- LD(i+3,3) \
+- PF0(i+4) \
+- PF0(i+6) \
+- XO1(i,0) \
+- XO1(i+1,1) \
+- XO1(i+2,2) \
+- XO1(i+3,3) \
+- ST(i,0) \
+- ST(i+1,1) \
+- ST(i+2,2) \
+- ST(i+3,3) \
++ PF1(i + 2) \
++ LD(i + 2, 2) \
++ LD(i + 3, 3) \
++ PF0(i + 4) \
++ PF0(i + 6) \
++ XO1(i, 0) \
++ XO1(i + 1, 1) \
++ XO1(i + 2, 2) \
++ XO1(i + 3, 3) \
++ ST(i, 0) \
++ ST(i + 1, 1) \
++ ST(i + 2, 2) \
++ ST(i + 3, 3) \
+
+
+ PF0(0)
+ PF0(2)
+
+ " .align 32 ;\n"
+- " 1: ;\n"
++ " 1: ;\n"
+
+ BLOCK(0)
+ BLOCK(4)
+ BLOCK(8)
+ BLOCK(12)
+
+- " addq %[inc], %[p1] ;\n"
+- " addq %[inc], %[p2] ;\n"
++ " addq %[inc], %[p1] ;\n"
++ " addq %[inc], %[p2] ;\n"
+ " decl %[cnt] ; jnz 1b"
+ : [p1] "+r" (p1), [p2] "+r" (p2), [cnt] "+r" (lines)
+- : [inc] "r" (256UL)
+- : "memory");
++ : [inc] "r" (256UL)
++ : "memory");
+
+ XMMS_RESTORE;
+ }
+@@ -117,52 +121,52 @@ xor_sse_3(unsigned long bytes, unsigned
+
+ XMMS_SAVE;
+
+- __asm__ __volatile__ (
++ asm volatile(
+ #undef BLOCK
+ #define BLOCK(i) \
+ PF1(i) \
+- PF1(i+2) \
+- LD(i,0) \
+- LD(i+1,1) \
+- LD(i+2,2) \
+- LD(i+3,3) \
++ PF1(i + 2) \
++ LD(i, 0) \
++ LD(i + 1, 1) \
++ LD(i + 2, 2) \
++ LD(i + 3, 3) \
+ PF2(i) \
+- PF2(i+2) \
+- PF0(i+4) \
+- PF0(i+6) \
+- XO1(i,0) \
+- XO1(i+1,1) \
+- XO1(i+2,2) \
+- XO1(i+3,3) \
+- XO2(i,0) \
+- XO2(i+1,1) \
+- XO2(i+2,2) \
+- XO2(i+3,3) \
+- ST(i,0) \
+- ST(i+1,1) \
+- ST(i+2,2) \
+- ST(i+3,3) \
++ PF2(i + 2) \
++ PF0(i + 4) \
++ PF0(i + 6) \
++ XO1(i, 0) \
++ XO1(i + 1, 1) \
++ XO1(i + 2, 2) \
++ XO1(i + 3, 3) \
++ XO2(i, 0) \
++ XO2(i + 1, 1) \
++ XO2(i + 2, 2) \
++ XO2(i + 3, 3) \
++ ST(i, 0) \
++ ST(i + 1, 1) \
++ ST(i + 2, 2) \
++ ST(i + 3, 3) \
+
+
+ PF0(0)
+ PF0(2)
+
+ " .align 32 ;\n"
+- " 1: ;\n"
++ " 1: ;\n"
+
+ BLOCK(0)
+ BLOCK(4)
+ BLOCK(8)
+ BLOCK(12)
+
+- " addq %[inc], %[p1] ;\n"
+- " addq %[inc], %[p2] ;\n"
+- " addq %[inc], %[p3] ;\n"
++ " addq %[inc], %[p1] ;\n"
++ " addq %[inc], %[p2] ;\n"
++ " addq %[inc], %[p3] ;\n"
+ " decl %[cnt] ; jnz 1b"
+ : [cnt] "+r" (lines),
+ [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3)
+ : [inc] "r" (256UL)
+- : "memory");
++ : "memory");
+ XMMS_RESTORE;
+ }
+
+@@ -171,64 +175,64 @@ xor_sse_4(unsigned long bytes, unsigned
+ unsigned long *p3, unsigned long *p4)
+ {
+ unsigned int lines = bytes >> 8;
+- xmm_store_t xmm_save[4];
++ xmm_store_t xmm_save[4];
+ unsigned long cr0;
+
+ XMMS_SAVE;
+
+- __asm__ __volatile__ (
++ asm volatile(
+ #undef BLOCK
+ #define BLOCK(i) \
+ PF1(i) \
+- PF1(i+2) \
+- LD(i,0) \
+- LD(i+1,1) \
+- LD(i+2,2) \
+- LD(i+3,3) \
++ PF1(i + 2) \
++ LD(i, 0) \
++ LD(i + 1, 1) \
++ LD(i + 2, 2) \
++ LD(i + 3, 3) \
+ PF2(i) \
+- PF2(i+2) \
+- XO1(i,0) \
+- XO1(i+1,1) \
+- XO1(i+2,2) \
+- XO1(i+3,3) \
++ PF2(i + 2) \
++ XO1(i, 0) \
++ XO1(i + 1, 1) \
++ XO1(i + 2, 2) \
++ XO1(i + 3, 3) \
+ PF3(i) \
+- PF3(i+2) \
+- PF0(i+4) \
+- PF0(i+6) \
+- XO2(i,0) \
+- XO2(i+1,1) \
+- XO2(i+2,2) \
+- XO2(i+3,3) \
+- XO3(i,0) \
+- XO3(i+1,1) \
+- XO3(i+2,2) \
+- XO3(i+3,3) \
+- ST(i,0) \
+- ST(i+1,1) \
+- ST(i+2,2) \
+- ST(i+3,3) \
++ PF3(i + 2) \
++ PF0(i + 4) \
++ PF0(i + 6) \
++ XO2(i, 0) \
++ XO2(i + 1, 1) \
++ XO2(i + 2, 2) \
++ XO2(i + 3, 3) \
++ XO3(i, 0) \
++ XO3(i + 1, 1) \
++ XO3(i + 2, 2) \
++ XO3(i + 3, 3) \
++ ST(i, 0) \
++ ST(i + 1, 1) \
++ ST(i + 2, 2) \
++ ST(i + 3, 3) \
+
+
+ PF0(0)
+ PF0(2)
+
+ " .align 32 ;\n"
+- " 1: ;\n"
++ " 1: ;\n"
+
+ BLOCK(0)
+ BLOCK(4)
+ BLOCK(8)
+ BLOCK(12)
+
+- " addq %[inc], %[p1] ;\n"
+- " addq %[inc], %[p2] ;\n"
+- " addq %[inc], %[p3] ;\n"
+- " addq %[inc], %[p4] ;\n"
++ " addq %[inc], %[p1] ;\n"
++ " addq %[inc], %[p2] ;\n"
++ " addq %[inc], %[p3] ;\n"
++ " addq %[inc], %[p4] ;\n"
+ " decl %[cnt] ; jnz 1b"
+ : [cnt] "+c" (lines),
+ [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3), [p4] "+r" (p4)
+ : [inc] "r" (256UL)
+- : "memory" );
++ : "memory" );
+
+ XMMS_RESTORE;
+ }
+@@ -237,70 +241,70 @@ static void
+ xor_sse_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
+ unsigned long *p3, unsigned long *p4, unsigned long *p5)
+ {
+- unsigned int lines = bytes >> 8;
++ unsigned int lines = bytes >> 8;
+ xmm_store_t xmm_save[4];
+ unsigned long cr0;
+
+ XMMS_SAVE;
+
+- __asm__ __volatile__ (
++ asm volatile(
+ #undef BLOCK
+ #define BLOCK(i) \
+ PF1(i) \
+- PF1(i+2) \
+- LD(i,0) \
+- LD(i+1,1) \
+- LD(i+2,2) \
+- LD(i+3,3) \
++ PF1(i + 2) \
++ LD(i, 0) \
++ LD(i + 1, 1) \
++ LD(i + 2, 2) \
++ LD(i + 3, 3) \
+ PF2(i) \
+- PF2(i+2) \
+- XO1(i,0) \
+- XO1(i+1,1) \
+- XO1(i+2,2) \
+- XO1(i+3,3) \
++ PF2(i + 2) \
++ XO1(i, 0) \
++ XO1(i + 1, 1) \
++ XO1(i + 2, 2) \
++ XO1(i + 3, 3) \
+ PF3(i) \
+- PF3(i+2) \
+- XO2(i,0) \
+- XO2(i+1,1) \
+- XO2(i+2,2) \
+- XO2(i+3,3) \
++ PF3(i + 2) \
++ XO2(i, 0) \
++ XO2(i + 1, 1) \
++ XO2(i + 2, 2) \
++ XO2(i + 3, 3) \
+ PF4(i) \
+- PF4(i+2) \
+- PF0(i+4) \
+- PF0(i+6) \
+- XO3(i,0) \
+- XO3(i+1,1) \
+- XO3(i+2,2) \
+- XO3(i+3,3) \
+- XO4(i,0) \
+- XO4(i+1,1) \
+- XO4(i+2,2) \
+- XO4(i+3,3) \
+- ST(i,0) \
+- ST(i+1,1) \
+- ST(i+2,2) \
+- ST(i+3,3) \
++ PF4(i + 2) \
++ PF0(i + 4) \
++ PF0(i + 6) \
++ XO3(i, 0) \
++ XO3(i + 1, 1) \
++ XO3(i + 2, 2) \
++ XO3(i + 3, 3) \
++ XO4(i, 0) \
++ XO4(i + 1, 1) \
++ XO4(i + 2, 2) \
++ XO4(i + 3, 3) \
++ ST(i, 0) \
++ ST(i + 1, 1) \
++ ST(i + 2, 2) \
++ ST(i + 3, 3) \
+
+
+ PF0(0)
+ PF0(2)
+
+ " .align 32 ;\n"
+- " 1: ;\n"
++ " 1: ;\n"
+
+ BLOCK(0)
+ BLOCK(4)
+ BLOCK(8)
+ BLOCK(12)
+
+- " addq %[inc], %[p1] ;\n"
+- " addq %[inc], %[p2] ;\n"
+- " addq %[inc], %[p3] ;\n"
+- " addq %[inc], %[p4] ;\n"
+- " addq %[inc], %[p5] ;\n"
++ " addq %[inc], %[p1] ;\n"
++ " addq %[inc], %[p2] ;\n"
++ " addq %[inc], %[p3] ;\n"
++ " addq %[inc], %[p4] ;\n"
++ " addq %[inc], %[p5] ;\n"
+ " decl %[cnt] ; jnz 1b"
+ : [cnt] "+c" (lines),
+- [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3), [p4] "+r" (p4),
++ [p1] "+r" (p1), [p2] "+r" (p2), [p3] "+r" (p3), [p4] "+r" (p4),
+ [p5] "+r" (p5)
+ : [inc] "r" (256UL)
+ : "memory");
+@@ -309,18 +313,18 @@ xor_sse_5(unsigned long bytes, unsigned
+ }
+
+ static struct xor_block_template xor_block_sse = {
+- .name = "generic_sse",
+- .do_2 = xor_sse_2,
+- .do_3 = xor_sse_3,
+- .do_4 = xor_sse_4,
+- .do_5 = xor_sse_5,
++ .name = "generic_sse",
++ .do_2 = xor_sse_2,
++ .do_3 = xor_sse_3,
++ .do_4 = xor_sse_4,
++ .do_5 = xor_sse_5,
+ };
+
+ #undef XOR_TRY_TEMPLATES
+-#define XOR_TRY_TEMPLATES \
+- do { \
+- xor_speed(&xor_block_sse); \
+- } while (0)
++#define XOR_TRY_TEMPLATES \
++do { \
++ xor_speed(&xor_block_sse); \
++} while (0)
+
+ /* We force the use of the SSE xor block because it can write around L2.
+ We may also be able to load into the L1 only depending on how the cpu
+--- a/include/asm-x86/scatterlist.h
++++ b/include/asm-x86/scatterlist.h
+@@ -24,7 +24,7 @@ struct scatterlist {
+ * returns.
+ */
+ #define sg_dma_address(sg) ((sg)->dma_address)
+-#ifdef CONFIG_X86_32
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+ # define sg_dma_len(sg) ((sg)->length)
+ #else
+ # define sg_dma_len(sg) ((sg)->dma_length)
+--- a/include/linux/page-flags.h
++++ b/include/linux/page-flags.h
+@@ -276,18 +276,25 @@ static inline void SetPageUptodate(struc
+
+ CLEARPAGEFLAG(Uptodate, uptodate)
+
+-#define PageForeign(page) test_bit(PG_foreign, &(page)->flags)
+-#define SetPageForeign(_page, dtor) do { \
+- set_bit(PG_foreign, &(_page)->flags); \
+- BUG_ON((dtor) == (void (*)(struct page *, unsigned int))0); \
+- (_page)->index = (long)(dtor); \
+-} while (0)
+-#define ClearPageForeign(page) do { \
+- clear_bit(PG_foreign, &(page)->flags); \
+- (page)->index = 0; \
+-} while (0)
+-#define PageForeignDestructor(_page, order) \
+- ((void (*)(struct page *, unsigned int))(_page)->index)(_page, order)
++#ifdef CONFIG_XEN
++TESTPAGEFLAG(Foreign, foreign)
++static inline void SetPageForeign(struct page *page,
++ void (*dtor)(struct page *, unsigned int))
++{
++ BUG_ON(!dtor);
++ set_bit(PG_foreign, &page->flags);
++ page->index = (long)dtor;
++}
++static inline void ClearPageForeign(struct page *page)
++{
++ clear_bit(PG_foreign, &page->flags);
++ page->index = 0;
++}
++static inline void PageForeignDestructor(struct page *page, unsigned int order)
++{
++ ((void (*)(struct page *, unsigned int))page->index)(page, order);
++}
++#endif
+
+ extern void cancel_dirty_page(struct page *page, unsigned int account_size);
+
+--- a/include/xen/balloon.h
++++ b/include/xen/balloon.h
+@@ -31,9 +31,12 @@
+ * IN THE SOFTWARE.
+ */
+
+-#ifndef __ASM_BALLOON_H__
+-#define __ASM_BALLOON_H__
++#ifndef __XEN_BALLOON_H__
++#define __XEN_BALLOON_H__
+
++#include <linux/spinlock.h>
++
++#if !defined(CONFIG_PARAVIRT_XEN) || defined(HAVE_XEN_PLATFORM_COMPAT_H)
+ /*
+ * Inform the balloon driver that it should allow some slop for device-driver
+ * memory activities.
+@@ -53,5 +56,6 @@ void balloon_release_driver_page(struct
+ extern spinlock_t balloon_lock;
+ #define balloon_lock(__flags) spin_lock_irqsave(&balloon_lock, __flags)
+ #define balloon_unlock(__flags) spin_unlock_irqrestore(&balloon_lock, __flags)
++#endif
+
+-#endif /* __ASM_BALLOON_H__ */
++#endif /* __XEN_BALLOON_H__ */
+--- a/include/xen/interface/grant_table.h
++++ b/include/xen/interface/grant_table.h
+@@ -193,6 +193,7 @@ struct gnttab_map_grant_ref {
+ grant_handle_t handle;
+ uint64_t dev_bus_addr;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(gnttab_map_grant_ref);
+ typedef struct gnttab_map_grant_ref gnttab_map_grant_ref_t;
+ DEFINE_XEN_GUEST_HANDLE(gnttab_map_grant_ref_t);
+
+@@ -216,6 +217,7 @@ struct gnttab_unmap_grant_ref {
+ /* OUT parameters. */
+ int16_t status; /* GNTST_* */
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(gnttab_unmap_grant_ref);
+ typedef struct gnttab_unmap_grant_ref gnttab_unmap_grant_ref_t;
+ DEFINE_XEN_GUEST_HANDLE(gnttab_unmap_grant_ref_t);
+
+@@ -237,6 +239,7 @@ struct gnttab_setup_table {
+ int16_t status; /* GNTST_* */
+ XEN_GUEST_HANDLE(ulong) frame_list;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(gnttab_setup_table);
+ typedef struct gnttab_setup_table gnttab_setup_table_t;
+ DEFINE_XEN_GUEST_HANDLE(gnttab_setup_table_t);
+
+@@ -251,6 +254,7 @@ struct gnttab_dump_table {
+ /* OUT parameters. */
+ int16_t status; /* GNTST_* */
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(gnttab_dump_table);
+ typedef struct gnttab_dump_table gnttab_dump_table_t;
+ DEFINE_XEN_GUEST_HANDLE(gnttab_dump_table_t);
+
+@@ -271,6 +275,7 @@ struct gnttab_transfer {
+ /* OUT parameters. */
+ int16_t status;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(gnttab_transfer);
+ typedef struct gnttab_transfer gnttab_transfer_t;
+ DEFINE_XEN_GUEST_HANDLE(gnttab_transfer_t);
+
+@@ -314,6 +319,7 @@ typedef struct gnttab_copy {
+ /* OUT parameters. */
+ int16_t status;
+ } gnttab_copy_t;
++DEFINE_XEN_GUEST_HANDLE_STRUCT(gnttab_copy);
+ DEFINE_XEN_GUEST_HANDLE(gnttab_copy_t);
+
+ /*
+@@ -332,6 +338,7 @@ struct gnttab_query_size {
+ uint32_t max_nr_frames;
+ int16_t status; /* GNTST_* */
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(gnttab_query_size);
+ typedef struct gnttab_query_size gnttab_query_size_t;
+ DEFINE_XEN_GUEST_HANDLE(gnttab_query_size_t);
+
+--- a/include/xen/interface/io/fbif.h
++++ b/include/xen/interface/io/fbif.h
+@@ -150,7 +150,12 @@ struct xenfb_page
+ * framebuffer with a max resolution of 12,800x10,240. Should
+ * be enough for a while with room leftover for expansion.
+ */
++#ifndef CONFIG_PARAVIRT_XEN
+ unsigned long pd[256];
++#else
++ /* Two directory pages should be enough for a while. */
++ unsigned long pd[2];
++#endif
+ };
+
+ /*
+--- a/include/xen/interface/memory.h
++++ b/include/xen/interface/memory.h
+@@ -62,7 +62,7 @@ struct xen_memory_reservation {
+ * OUT: GMFN bases of extents that were allocated
+ * (NB. This command also updates the mach_to_phys translation table)
+ */
+- XEN_GUEST_HANDLE(ulong) extent_start;
++ XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
+
+ /* Number of extents, and size/alignment of each (2^extent_order pages). */
+ xen_ulong_t nr_extents;
+@@ -82,7 +82,6 @@ struct xen_memory_reservation {
+ domid_t domid;
+
+ };
+-DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_memory_reservation);
+ typedef struct xen_memory_reservation xen_memory_reservation_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_memory_reservation_t);
+
+@@ -168,7 +167,11 @@ struct xen_machphys_mfn_list {
+ * any large discontiguities in the machine address space, 2MB gaps in
+ * the machphys table will be represented by an MFN base of zero.
+ */
++#ifndef CONFIG_PARAVIRT_XEN
+ XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
++#else
++ ulong extent_start;
++#endif
+
+ /*
+ * Number of extents written to the above array. This will be smaller
+@@ -176,7 +179,6 @@ struct xen_machphys_mfn_list {
+ */
+ unsigned int nr_extents;
+ };
+-DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list);
+ typedef struct xen_machphys_mfn_list xen_machphys_mfn_list_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_machphys_mfn_list_t);
+
+@@ -216,7 +218,6 @@ struct xen_add_to_physmap {
+ /* GPFN where the source mapping page should appear. */
+ xen_pfn_t gpfn;
+ };
+-DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
+ typedef struct xen_add_to_physmap xen_add_to_physmap_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
+
+@@ -249,13 +250,21 @@ struct xen_translate_gpfn_list {
+ xen_ulong_t nr_gpfns;
+
+ /* List of GPFNs to translate. */
++#ifndef CONFIG_PARAVIRT_XEN
+ XEN_GUEST_HANDLE(xen_pfn_t) gpfn_list;
++#else
++ ulong gpfn_list;
++#endif
+
+ /*
+ * Output list to contain MFN translations. May be the same as the input
+ * list (in which case each input GPFN is overwritten with the output MFN).
+ */
++#ifndef CONFIG_PARAVIRT_XEN
+ XEN_GUEST_HANDLE(xen_pfn_t) mfn_list;
++#else
++ ulong mfn_list;
++#endif
+ };
+ DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_translate_gpfn_list);
+ typedef struct xen_translate_gpfn_list xen_translate_gpfn_list_t;
+--- a/include/xen/interface/vcpu.h
++++ b/include/xen/interface/vcpu.h
+@@ -85,6 +85,7 @@ struct vcpu_runstate_info {
+ */
+ uint64_t time[4];
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(vcpu_runstate_info);
+ typedef struct vcpu_runstate_info vcpu_runstate_info_t;
+ DEFINE_XEN_GUEST_HANDLE(vcpu_runstate_info_t);
+
+@@ -140,6 +141,7 @@ DEFINE_XEN_GUEST_HANDLE(vcpu_register_ru
+ struct vcpu_set_periodic_timer {
+ uint64_t period_ns;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(vcpu_set_periodic_timer);
+ typedef struct vcpu_set_periodic_timer vcpu_set_periodic_timer_t;
+ DEFINE_XEN_GUEST_HANDLE(vcpu_set_periodic_timer_t);
+
+@@ -153,6 +155,7 @@ struct vcpu_set_singleshot_timer {
+ uint64_t timeout_abs_ns; /* Absolute system time value in nanoseconds. */
+ uint32_t flags; /* VCPU_SSHOTTMR_??? */
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(vcpu_set_singleshot_timer);
+ typedef struct vcpu_set_singleshot_timer vcpu_set_singleshot_timer_t;
+ DEFINE_XEN_GUEST_HANDLE(vcpu_set_singleshot_timer_t);
+
+@@ -176,6 +179,7 @@ struct vcpu_register_vcpu_info {
+ uint32_t offset; /* offset within page */
+ uint32_t rsvd; /* unused */
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(vcpu_register_vcpu_info);
+ typedef struct vcpu_register_vcpu_info vcpu_register_vcpu_info_t;
+ DEFINE_XEN_GUEST_HANDLE(vcpu_register_vcpu_info_t);
+
+--- a/lib/swiotlb-xen.c
++++ b/lib/swiotlb-xen.c
+@@ -20,6 +20,7 @@
+ #include <linux/ctype.h>
+ #include <linux/init.h>
+ #include <linux/bootmem.h>
++#include <linux/iommu-helper.h>
+ #include <linux/highmem.h>
+ #include <asm/io.h>
+ #include <asm/pci.h>
+@@ -288,15 +289,6 @@ __sync_single(struct phys_addr buffer, c
+ }
+ }
+
+-static inline unsigned int is_span_boundary(unsigned int index,
+- unsigned int nslots,
+- unsigned long offset_slots,
+- unsigned long max_slots)
+-{
+- unsigned long offset = (offset_slots + index) & (max_slots - 1);
+- return offset + nslots > max_slots;
+-}
+-
+ /*
+ * Allocates bounce buffer and returns its kernel virtual address.
+ */
+@@ -335,61 +327,53 @@ map_single(struct device *hwdev, struct
+ * request and allocate a buffer from that IO TLB pool.
+ */
+ spin_lock_irqsave(&io_tlb_lock, flags);
+- {
+- index = ALIGN(io_tlb_index, stride);
+- if (index >= iotlb_nslabs)
+- index = 0;
+- wrap = index;
++ index = ALIGN(io_tlb_index, stride);
++ if (index >= iotlb_nslabs)
++ index = 0;
++ wrap = index;
+
+- do {
+- while (is_span_boundary(index, nslots, offset_slots,
+- max_slots)) {
+- index += stride;
+- if (index >= iotlb_nslabs)
+- index = 0;
+- if (index == wrap)
+- goto not_found;
+- }
++ do {
++ while (iommu_is_span_boundary(index, nslots, offset_slots,
++ max_slots)) {
++ index += stride;
++ if (index >= iotlb_nslabs)
++ index = 0;
++ if (index == wrap)
++ goto not_found;
++ }
++
++ /*
++ * If we find a slot that indicates we have 'nslots' number of
++ * contiguous buffers, we allocate the buffers from that slot
++ * and mark the entries as '0' indicating unavailable.
++ */
++ if (io_tlb_list[index] >= nslots) {
++ int count = 0;
++
++ for (i = index; i < (int) (index + nslots); i++)
++ io_tlb_list[i] = 0;
++ for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE - 1) && io_tlb_list[i]; i--)
++ io_tlb_list[i] = ++count;
++ dma_addr = iotlb_virt_start + (index << IO_TLB_SHIFT);
+
+ /*
+- * If we find a slot that indicates we have 'nslots'
+- * number of contiguous buffers, we allocate the
+- * buffers from that slot and mark the entries as '0'
+- * indicating unavailable.
++ * Update the indices to avoid searching in the next
++ * round.
+ */
+- if (io_tlb_list[index] >= nslots) {
+- int count = 0;
+-
+- for (i = index; i < (int)(index + nslots); i++)
+- io_tlb_list[i] = 0;
+- for (i = index - 1;
+- (OFFSET(i, IO_TLB_SEGSIZE) !=
+- IO_TLB_SEGSIZE -1) && io_tlb_list[i];
+- i--)
+- io_tlb_list[i] = ++count;
+- dma_addr = iotlb_virt_start +
+- (index << IO_TLB_SHIFT);
+-
+- /*
+- * Update the indices to avoid searching in
+- * the next round.
+- */
+- io_tlb_index =
+- ((index + nslots) < iotlb_nslabs
+- ? (index + nslots) : 0);
++ io_tlb_index = ((index + nslots) < iotlb_nslabs
++ ? (index + nslots) : 0);
+
+- goto found;
+- }
+- index += stride;
+- if (index >= iotlb_nslabs)
+- index = 0;
+- } while (index != wrap);
++ goto found;
++ }
++ index += stride;
++ if (index >= iotlb_nslabs)
++ index = 0;
++ } while (index != wrap);
+
+- not_found:
+- spin_unlock_irqrestore(&io_tlb_lock, flags);
+- return NULL;
+- }
+- found:
++not_found:
++ spin_unlock_irqrestore(&io_tlb_lock, flags);
++ return NULL;
++found:
+ spin_unlock_irqrestore(&io_tlb_lock, flags);
+
+ /*
+@@ -502,11 +486,13 @@ swiotlb_full(struct device *dev, size_t
+ * Once the device is given the dma address, the device owns this memory until
+ * either swiotlb_unmap_single or swiotlb_dma_sync_single is performed.
+ */
+-dma_addr_t
+-swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir)
+-{
+- dma_addr_t dev_addr = gnttab_dma_map_page(virt_to_page(ptr)) +
+- offset_in_page(ptr);
++static dma_addr_t
++_swiotlb_map_single(struct device *hwdev, phys_addr_t paddr, size_t size,
++ int dir, struct dma_attrs *attrs)
++{
++ struct page *page = pfn_to_page(paddr >> PAGE_SHIFT);
++ dma_addr_t dev_addr = gnttab_dma_map_page(page) +
++ offset_in_page(paddr);
+ void *map;
+ struct phys_addr buffer;
+
+@@ -517,7 +503,7 @@ swiotlb_map_single(struct device *hwdev,
+ * we can safely return the device addr and not worry about bounce
+ * buffering it.
+ */
+- if (!range_straddles_page_boundary(__pa(ptr), size) &&
++ if (!range_straddles_page_boundary(paddr, size) &&
+ !address_needs_mapping(hwdev, dev_addr))
+ return dev_addr;
+
+@@ -525,8 +511,8 @@ swiotlb_map_single(struct device *hwdev,
+ * Oh well, have to allocate and map a bounce buffer.
+ */
+ gnttab_dma_unmap_page(dev_addr);
+- buffer.page = virt_to_page(ptr);
+- buffer.offset = (unsigned long)ptr & ~PAGE_MASK;
++ buffer.page = page;
++ buffer.offset = offset_in_page(paddr);
+ map = map_single(hwdev, buffer, size, dir);
+ if (!map) {
+ swiotlb_full(hwdev, size, dir, 1);
+@@ -537,6 +523,26 @@ swiotlb_map_single(struct device *hwdev,
+ return dev_addr;
+ }
+
++dma_addr_t
++swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
++ int dir, struct dma_attrs *attrs)
++{
++ return _swiotlb_map_single(hwdev, virt_to_phys(ptr), size, dir, attrs);
++}
++EXPORT_SYMBOL(swiotlb_map_single_attrs);
++
++dma_addr_t
++swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir)
++{
++ return _swiotlb_map_single(hwdev, virt_to_phys(ptr), size, dir, NULL);
++}
++
++dma_addr_t
++swiotlb_map_single_phys(struct device *hwdev, phys_addr_t paddr, size_t size, int dir)
++{
++ return _swiotlb_map_single(hwdev, paddr, size, dir, NULL);
++}
++
+ /*
+ * Unmap a single streaming mode DMA translation. The dma_addr and size must
+ * match what was provided for in a previous swiotlb_map_single call. All
+@@ -546,8 +552,8 @@ swiotlb_map_single(struct device *hwdev,
+ * whatever the device wrote there.
+ */
+ void
+-swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size,
+- int dir)
++swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
++ size_t size, int dir, struct dma_attrs *attrs)
+ {
+ BUG_ON(dir == DMA_NONE);
+ if (in_swiotlb_aperture(dev_addr))
+@@ -555,7 +561,14 @@ swiotlb_unmap_single(struct device *hwde
+ else
+ gnttab_dma_unmap_page(dev_addr);
+ }
++EXPORT_SYMBOL(swiotlb_unmap_single_attrs);
+
++void
++swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size,
++ int dir)
++{
++ return swiotlb_unmap_single_attrs(hwdev, dev_addr, size, dir, NULL);
++}
+ /*
+ * Make physical memory consistent for a single streaming mode DMA translation
+ * after a transfer.
+@@ -584,6 +597,26 @@ swiotlb_sync_single_for_device(struct de
+ sync_single(hwdev, bus_to_virt(dev_addr), size, dir);
+ }
+
++void
++swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
++ unsigned long offset, size_t size, int dir)
++{
++ BUG_ON(dir == DMA_NONE);
++ if (in_swiotlb_aperture(dev_addr))
++ sync_single(hwdev, bus_to_virt(dev_addr + offset), size, dir);
++}
++
++void
++swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
++ unsigned long offset, size_t size, int dir)
++{
++ BUG_ON(dir == DMA_NONE);
++ if (in_swiotlb_aperture(dev_addr))
++ sync_single(hwdev, bus_to_virt(dev_addr + offset), size, dir);
++}
++
++void swiotlb_unmap_sg_attrs(struct device *, struct scatterlist *, int, int,
++ struct dma_attrs *);
+ /*
+ * Map a set of buffers described by scatterlist in streaming mode for DMA.
+ * This is the scatter-gather version of the above swiotlb_map_single
+@@ -601,8 +634,8 @@ swiotlb_sync_single_for_device(struct de
+ * same here.
+ */
+ int
+-swiotlb_map_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
+- int dir)
++swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
++ int dir, struct dma_attrs *attrs)
+ {
+ struct scatterlist *sg;
+ struct phys_addr buffer;
+@@ -626,7 +659,8 @@ swiotlb_map_sg(struct device *hwdev, str
+ /* Don't panic here, we expect map_sg users
+ to do proper error handling. */
+ swiotlb_full(hwdev, sg->length, dir, 0);
+- swiotlb_unmap_sg(hwdev, sgl, i, dir);
++ swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir,
++ attrs);
+ sgl[0].dma_length = 0;
+ return 0;
+ }
+@@ -637,14 +671,22 @@ swiotlb_map_sg(struct device *hwdev, str
+ }
+ return nelems;
+ }
++EXPORT_SYMBOL(swiotlb_map_sg_attrs);
++
++int
++swiotlb_map_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
++ int dir)
++{
++ return swiotlb_map_sg_attrs(hwdev, sgl, nelems, dir, NULL);
++}
+
+ /*
+ * Unmap a set of streaming mode DMA translations. Again, cpu read rules
+ * concerning calls here are the same as for swiotlb_unmap_single() above.
+ */
+ void
+-swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
+- int dir)
++swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
++ int nelems, int dir, struct dma_attrs *attrs)
+ {
+ struct scatterlist *sg;
+ int i;
+@@ -659,6 +701,14 @@ swiotlb_unmap_sg(struct device *hwdev, s
+ gnttab_dma_unmap_page(sg->dma_address);
+ }
+ }
++EXPORT_SYMBOL(swiotlb_unmap_sg_attrs);
++
++void
++swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
++ int dir)
++{
++ return swiotlb_unmap_sg_attrs(hwdev, sgl, nelems, dir, NULL);
++}
+
+ /*
+ * Make physical memory consistent for a set of streaming mode DMA translations
+@@ -699,46 +749,6 @@ swiotlb_sync_sg_for_device(struct device
+ }
+ }
+
+-#ifdef CONFIG_HIGHMEM
+-
+-dma_addr_t
+-swiotlb_map_page(struct device *hwdev, struct page *page,
+- unsigned long offset, size_t size,
+- enum dma_data_direction direction)
+-{
+- struct phys_addr buffer;
+- dma_addr_t dev_addr;
+- char *map;
+-
+- dev_addr = gnttab_dma_map_page(page) + offset;
+- if (address_needs_mapping(hwdev, dev_addr)) {
+- gnttab_dma_unmap_page(dev_addr);
+- buffer.page = page;
+- buffer.offset = offset;
+- map = map_single(hwdev, buffer, size, direction);
+- if (!map) {
+- swiotlb_full(hwdev, size, direction, 1);
+- map = io_tlb_overflow_buffer;
+- }
+- dev_addr = (dma_addr_t)virt_to_bus(map);
+- }
+-
+- return dev_addr;
+-}
+-
+-void
+-swiotlb_unmap_page(struct device *hwdev, dma_addr_t dma_address,
+- size_t size, enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+- if (in_swiotlb_aperture(dma_address))
+- unmap_single(hwdev, bus_to_virt(dma_address), size, direction);
+- else
+- gnttab_dma_unmap_page(dma_address);
+-}
+-
+-#endif
+-
+ int
+ swiotlb_dma_mapping_error(dma_addr_t dma_addr)
+ {
--- /dev/null
+From: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
+Subject: [PATCH] Linux: Update to 2.6.27
+Patch-mainline: 2.6.27
+
+ This patch contains the differences between Linux 2.6.26 and 2.6.27.
+
+Acked-by: Jeff Mahoney <jeffm@suse.com>
+Automatically created from "patches.kernel.org/patch-2.6.27" by xen-port-patches.py
+
+Index: head-2008-12-01/arch/x86/Kconfig
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Kconfig 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/Kconfig 2008-12-01 11:49:07.000000000 +0100
+@@ -590,7 +590,7 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT
+ config AMD_IOMMU
+ bool "AMD IOMMU support"
+ select SWIOTLB
+- depends on X86_64 && PCI && ACPI
++ depends on X86_64 && PCI && ACPI && !X86_64_XEN
+ help
+ With this option you can enable support for AMD IOMMU hardware in
+ your system. An IOMMU is a hardware component which provides
+@@ -625,8 +625,10 @@ config MAXSMP
+
+ config NR_CPUS
+ int "Maximum number of CPUs (2-512)" if !MAXSMP
++ range 2 32 if XEN
+ range 2 512
+ depends on SMP
++ default "32" if MAXSMP && XEN
+ default "4096" if MAXSMP
+ default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
+ default "16" if X86_64_XEN
+@@ -1223,7 +1225,7 @@ config MTRR
+ config MTRR_SANITIZER
+ bool
+ prompt "MTRR cleanup support"
+- depends on MTRR
++ depends on MTRR && !XEN
+ help
+ Convert MTRR layout from continuous to discrete, so X drivers can
+ add writeback entries.
+Index: head-2008-12-01/arch/x86/Kconfig.debug
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Kconfig.debug 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/Kconfig.debug 2008-12-01 11:49:07.000000000 +0100
+@@ -25,6 +25,7 @@ config STRICT_DEVMEM
+ config X86_VERBOSE_BOOTUP
+ bool "Enable verbose x86 bootup info messages"
+ default y
++ depends on !XEN
+ help
+ Enables the informational output from the decompression stage
+ (e.g. bzImage) of the boot. If you disable this you will still
+@@ -166,7 +167,7 @@ config MMIOTRACE_HOOKS
+
+ config MMIOTRACE
+ bool "Memory mapped IO tracing"
+- depends on DEBUG_KERNEL && PCI
++ depends on DEBUG_KERNEL && PCI && !XEN
+ select TRACING
+ select MMIOTRACE_HOOKS
+ help
+Index: head-2008-12-01/arch/x86/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/Makefile 2008-12-01 11:36:55.000000000 +0100
++++ head-2008-12-01/arch/x86/Makefile 2008-12-01 11:49:07.000000000 +0100
+@@ -116,8 +116,8 @@ mflags-$(CONFIG_X86_VOYAGER) := -Iinclud
+ mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
+
+ # Xen subarch support
+-mflags-$(CONFIG_X86_XEN) := -Iinclude/asm-x86/mach-xen
+-mcore-$(CONFIG_X86_XEN) := arch/x86/mach-xen/
++mflags-$(CONFIG_XEN) := -Iinclude/asm-x86/mach-xen
++mcore-$(CONFIG_XEN) := arch/x86/mach-xen/
+
+ # generic subarchitecture
+ mflags-$(CONFIG_X86_GENERICARCH):= -Iinclude/asm-x86/mach-generic
+@@ -128,8 +128,10 @@ mcore-$(CONFIG_X86_GENERICARCH) := arch/
+ mflags-y += -Iinclude/asm-x86/mach-default
+
+ # 64 bit does not support subarch support - clear sub arch variables
++ifneq ($(CONFIG_XEN),y)
+ fcore-$(CONFIG_X86_64) :=
+ mcore-$(CONFIG_X86_64) :=
++endif
+
+ KBUILD_CFLAGS += $(mflags-y)
+ KBUILD_AFLAGS += $(mflags-y)
+Index: head-2008-12-01/arch/x86/ia32/ia32entry-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/ia32/ia32entry-xen.S 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/ia32/ia32entry-xen.S 2008-12-01 11:49:07.000000000 +0100
+@@ -15,6 +15,16 @@
+ #include <asm/irqflags.h>
+ #include <linux/linkage.h>
+
++/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */
++#include <linux/elf-em.h>
++#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
++#define __AUDIT_ARCH_LE 0x40000000
++
++#ifndef CONFIG_AUDITSYSCALL
++#define sysexit_audit int_ret_from_sys_call
++#define sysretl_audit int_ret_from_sys_call
++#endif
++
+ #define IA32_NR_syscalls ((ia32_syscall_end - ia32_sys_call_table)/8)
+
+ .macro IA32_ARG_FIXUP noebp=0
+@@ -37,6 +47,11 @@
+ movq %rax,R8(%rsp)
+ .endm
+
++ /*
++ * Reload arg registers from stack in case ptrace changed them.
++ * We don't reload %eax because syscall_trace_enter() returned
++ * the value it wants us to use in the table lookup.
++ */
+ .macro LOAD_ARGS32 offset
+ movl \offset(%rsp),%r11d
+ movl \offset+8(%rsp),%r10d
+@@ -46,7 +61,6 @@
+ movl \offset+48(%rsp),%edx
+ movl \offset+56(%rsp),%esi
+ movl \offset+64(%rsp),%edi
+- movl \offset+72(%rsp),%eax
+ .endm
+
+ .macro CFI_STARTPROC32 simple
+@@ -61,6 +75,19 @@
+ CFI_UNDEFINED r15
+ .endm
+
++#ifdef CONFIG_PARAVIRT
++ENTRY(native_usergs_sysret32)
++ swapgs
++ sysretl
++ENDPROC(native_usergs_sysret32)
++
++ENTRY(native_irq_enable_sysexit)
++ swapgs
++ sti
++ sysexit
++ENDPROC(native_irq_enable_sysexit)
++#endif
++
+ /*
+ * 32bit SYSENTER instruction entry.
+ *
+@@ -98,7 +125,7 @@ ENTRY(ia32_sysenter_target)
+ CFI_RESTORE rcx
+ movl %ebp,%ebp /* zero extension */
+ movl %eax,%eax
+- movl 48-THREAD_SIZE+threadinfo_sysenter_return(%rsp),%r10d
++ movl 48-THREAD_SIZE+TI_sysenter_return(%rsp),%r10d
+ movl $__USER32_DS,40(%rsp)
+ movq %rbp,32(%rsp)
+ movl $__USER32_CS,16(%rsp)
+@@ -113,19 +140,79 @@ ENTRY(ia32_sysenter_target)
+ .quad 1b,ia32_badarg
+ .previous
+ GET_THREAD_INFO(%r10)
+- orl $TS_COMPAT,threadinfo_status(%r10)
+- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
++ orl $TS_COMPAT,TI_status(%r10)
++ testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
+ jnz sysenter_tracesys
+-sysenter_do_call:
+ cmpl $(IA32_NR_syscalls-1),%eax
+ ja ia32_badsys
++sysenter_do_call:
+ IA32_ARG_FIXUP 1
++sysenter_dispatch:
+ call *ia32_sys_call_table(,%rax,8)
+ movq %rax,RAX-ARGOFFSET(%rsp)
++ GET_THREAD_INFO(%r10)
++ DISABLE_INTERRUPTS(CLBR_NONE)
++ TRACE_IRQS_OFF
++ testl $_TIF_ALLWORK_MASK,TI_flags(%r10)
++ jnz sysexit_audit
++ jmp int_ret_from_sys_call
++
++#ifdef CONFIG_AUDITSYSCALL
++ .macro auditsys_entry_common
++ movl %esi,%r9d /* 6th arg: 4th syscall arg */
++ movl %edx,%r8d /* 5th arg: 3rd syscall arg */
++ /* (already in %ecx) 4th arg: 2nd syscall arg */
++ movl %ebx,%edx /* 3rd arg: 1st syscall arg */
++ movl %eax,%esi /* 2nd arg: syscall number */
++ movl $AUDIT_ARCH_I386,%edi /* 1st arg: audit arch */
++ call audit_syscall_entry
++ movl RAX-ARGOFFSET(%rsp),%eax /* reload syscall number */
++ cmpl $(IA32_NR_syscalls-1),%eax
++ ja ia32_badsys
++ movl %ebx,%edi /* reload 1st syscall arg */
++ movl RCX-ARGOFFSET(%rsp),%esi /* reload 2nd syscall arg */
++ movl RDX-ARGOFFSET(%rsp),%edx /* reload 3rd syscall arg */
++ movl RSI-ARGOFFSET(%rsp),%ecx /* reload 4th syscall arg */
++ movl RDI-ARGOFFSET(%rsp),%r8d /* reload 5th syscall arg */
++ .endm
++
++ .macro auditsys_exit exit,ebpsave=RBP
++ testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10)
++ jnz int_ret_from_sys_call
++ TRACE_IRQS_ON
++ ENABLE_INTERRUPTS(CLBR_NONE)
++ movl %eax,%esi /* second arg, syscall return value */
++ cmpl $0,%eax /* is it < 0? */
++ setl %al /* 1 if so, 0 if not */
++ movzbl %al,%edi /* zero-extend that into %edi */
++ inc %edi /* first arg, 0->1(AUDITSC_SUCCESS), 1->2(AUDITSC_FAILURE) */
++ call audit_syscall_exit
++ GET_THREAD_INFO(%r10)
++ movl RAX-ARGOFFSET(%rsp),%eax /* reload syscall return value */
++ movl \ebpsave-ARGOFFSET(%rsp),%ebp /* reload user register value */
++ movl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),%edi
++ DISABLE_INTERRUPTS(CLBR_NONE)
++ TRACE_IRQS_OFF
++ testl %edi,TI_flags(%r10)
++ jnz int_with_check
+ jmp int_ret_from_sys_call
++ .endm
++
++sysenter_auditsys:
++ auditsys_entry_common
++ movl %ebp,%r9d /* reload 6th syscall arg */
++ jmp sysenter_dispatch
++
++sysexit_audit:
++ auditsys_exit sysexit_from_sys_call
++#endif
+
+ sysenter_tracesys:
+ xchgl %r9d,%ebp
++#ifdef CONFIG_AUDITSYSCALL
++ testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10)
++ jz sysenter_auditsys
++#endif
+ SAVE_REST
+ CLEAR_RREGS
+ movq %r9,R9(%rsp)
+@@ -186,18 +273,38 @@ ENTRY(ia32_cstar_target)
+ .quad 1b,ia32_badarg
+ .previous
+ GET_THREAD_INFO(%r10)
+- orl $TS_COMPAT,threadinfo_status(%r10)
+- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
++ orl $TS_COMPAT,TI_status(%r10)
++ testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
+ jnz cstar_tracesys
+ cstar_do_call:
+ cmpl $IA32_NR_syscalls-1,%eax
+ ja ia32_badsys
+ IA32_ARG_FIXUP 1
++cstar_dispatch:
+ call *ia32_sys_call_table(,%rax,8)
+ movq %rax,RAX-ARGOFFSET(%rsp)
++ GET_THREAD_INFO(%r10)
++ DISABLE_INTERRUPTS(CLBR_NONE)
++ testl $_TIF_ALLWORK_MASK,TI_flags(%r10)
++ jnz sysretl_audit
+ jmp int_ret_from_sys_call
+
+-cstar_tracesys:
++#ifdef CONFIG_AUDITSYSCALL
++cstar_auditsys:
++ movl %r9d,R9-ARGOFFSET(%rsp) /* register to be clobbered by call */
++ auditsys_entry_common
++ movl R9-ARGOFFSET(%rsp),%r9d /* reload 6th syscall arg */
++ jmp cstar_dispatch
++
++sysretl_audit:
++ auditsys_exit sysretl_from_sys_call, RCX /* user %ebp in RCX slot */
++#endif
++
++cstar_tracesys:
++#ifdef CONFIG_AUDITSYSCALL
++ testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10)
++ jz cstar_auditsys
++#endif
+ xchgl %r9d,%ebp
+ SAVE_REST
+ CLEAR_RREGS
+@@ -263,8 +370,8 @@ ENTRY(ia32_syscall)
+ this could be a problem. */
+ SAVE_ARGS 0,0,1
+ GET_THREAD_INFO(%r10)
+- orl $TS_COMPAT,threadinfo_status(%r10)
+- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
++ orl $TS_COMPAT,TI_status(%r10)
++ testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
+ jnz ia32_tracesys
+ ia32_do_syscall:
+ cmpl $(IA32_NR_syscalls-1),%eax
+@@ -309,13 +416,11 @@ quiet_ni_syscall:
+ PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
+ PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
+ PTREGSCALL stub32_sigaltstack, sys32_sigaltstack, %rdx
+- PTREGSCALL stub32_sigsuspend, sys32_sigsuspend, %rcx
+ PTREGSCALL stub32_execve, sys32_execve, %rcx
+ PTREGSCALL stub32_fork, sys_fork, %rdi
+ PTREGSCALL stub32_clone, sys32_clone, %rdx
+ PTREGSCALL stub32_vfork, sys_vfork, %rdi
+ PTREGSCALL stub32_iopl, sys_iopl, %rsi
+- PTREGSCALL stub32_rt_sigsuspend, sys_rt_sigsuspend, %rdx
+
+ ENTRY(ia32_ptregs_common)
+ popq %r11
+@@ -415,7 +520,7 @@ ia32_sys_call_table:
+ .quad sys_ssetmask
+ .quad sys_setreuid16 /* 70 */
+ .quad sys_setregid16
+- .quad stub32_sigsuspend
++ .quad sys32_sigsuspend
+ .quad compat_sys_sigpending
+ .quad sys_sethostname
+ .quad compat_sys_setrlimit /* 75 */
+@@ -522,7 +627,7 @@ ia32_sys_call_table:
+ .quad sys32_rt_sigpending
+ .quad compat_sys_rt_sigtimedwait
+ .quad sys32_rt_sigqueueinfo
+- .quad stub32_rt_sigsuspend
++ .quad sys_rt_sigsuspend
+ .quad sys32_pread /* 180 */
+ .quad sys32_pwrite
+ .quad sys_chown16
+@@ -670,4 +775,10 @@ ia32_sys_call_table:
+ .quad sys32_fallocate
+ .quad compat_sys_timerfd_settime /* 325 */
+ .quad compat_sys_timerfd_gettime
++ .quad compat_sys_signalfd4
++ .quad sys_eventfd2
++ .quad sys_epoll_create1
++ .quad sys_dup3 /* 330 */
++ .quad sys_pipe2
++ .quad sys_inotify_init1
+ ia32_syscall_end:
+Index: head-2008-12-01/arch/x86/kernel/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/Makefile 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/Makefile 2008-12-01 11:49:07.000000000 +0100
+@@ -120,9 +120,10 @@ ifeq ($(CONFIG_X86_64),y)
+
+ obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
+
+- obj-$(CONFIG_XEN) += nmi_64.o
++ obj-$(CONFIG_XEN) += nmi.o
+ time_64-$(CONFIG_XEN) += time_32.o
+ endif
+
+-disabled-obj-$(CONFIG_XEN) := early-quirks.o hpet.o i8253.o i8259_$(BITS).o \
+- pci-swiotlb_64.o reboot.o smpboot.o tlb_$(BITS).o tsc_$(BITS).o tsc_sync.o vsmp_64.o
++disabled-obj-$(CONFIG_XEN) := bios_uv.o early-quirks.o hpet.o i8253.o \
++ i8259.o irqinit_$(BITS).o pci-swiotlb_64.o reboot.o smpboot.o \
++ tlb_$(BITS).o tsc.o tsc_sync.o vsmp_64.o
+Index: head-2008-12-01/arch/x86/kernel/acpi/boot.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/boot.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/acpi/boot.c 2008-12-01 11:49:07.000000000 +0100
+@@ -951,7 +951,9 @@ void __init mp_register_ioapic(int id, u
+ mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
+ mp_ioapics[idx].mp_apicaddr = address;
+
++#ifndef CONFIG_XEN
+ set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
++#endif
+ mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
+ #ifdef CONFIG_X86_32
+ mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
+@@ -1108,7 +1110,7 @@ int mp_register_gsi(u32 gsi, int trigger
+ {
+ int ioapic;
+ int ioapic_pin;
+-#ifdef CONFIG_X86_32
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+ #define MAX_GSI_NUM 4096
+ #define IRQ_COMPRESSION_START 64
+
+@@ -1156,7 +1158,7 @@ int mp_register_gsi(u32 gsi, int trigger
+ if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
+ pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
+ mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
+-#ifdef CONFIG_X86_32
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+ return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
+ #else
+ return gsi;
+@@ -1164,7 +1166,7 @@ int mp_register_gsi(u32 gsi, int trigger
+ }
+
+ set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
+-#ifdef CONFIG_X86_32
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+ /*
+ * For GSI >= 64, use IRQ compression
+ */
+Index: head-2008-12-01/arch/x86/kernel/acpi/sleep-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/acpi/sleep-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/acpi/sleep-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -9,6 +9,7 @@
+ #include <linux/bootmem.h>
+ #include <linux/dmi.h>
+ #include <linux/cpumask.h>
++#include <asm/segment.h>
+
+ #include "realmode/wakeup.h"
+ #include "sleep.h"
+@@ -20,7 +21,7 @@ unsigned long acpi_realmode_flags;
+ /* address in low memory of the wakeup routine. */
+ static unsigned long acpi_realmode;
+
+-#ifdef CONFIG_64BIT
++#if defined(CONFIG_SMP) && defined(CONFIG_64BIT)
+ static char temp_stack[10240];
+ #endif
+ #endif
+@@ -54,18 +55,27 @@ int acpi_save_state_mem(void)
+ header->video_mode = saved_video_mode;
+
+ header->wakeup_jmp_seg = acpi_wakeup_address >> 4;
++
++ /*
++ * Set up the wakeup GDT. We set these up as Big Real Mode,
++ * that is, with limits set to 4 GB. At least the Lenovo
++ * Thinkpad X61 is known to need this for the video BIOS
++ * initialization quirk to work; this is likely to also
++ * be the case for other laptops or integrated video devices.
++ */
++
+ /* GDT[0]: GDT self-pointer */
+ header->wakeup_gdt[0] =
+ (u64)(sizeof(header->wakeup_gdt) - 1) +
+ ((u64)(acpi_wakeup_address +
+ ((char *)&header->wakeup_gdt - (char *)acpi_realmode))
+ << 16);
+- /* GDT[1]: real-mode-like code segment */
+- header->wakeup_gdt[1] = (0x009bULL << 40) +
+- ((u64)acpi_wakeup_address << 16) + 0xffff;
+- /* GDT[2]: real-mode-like data segment */
+- header->wakeup_gdt[2] = (0x0093ULL << 40) +
+- ((u64)acpi_wakeup_address << 16) + 0xffff;
++ /* GDT[1]: big real mode-like code segment */
++ header->wakeup_gdt[1] =
++ GDT_ENTRY(0x809b, acpi_wakeup_address, 0xfffff);
++ /* GDT[2]: big real mode-like data segment */
++ header->wakeup_gdt[2] =
++ GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
+
+ #ifndef CONFIG_64BIT
+ store_gdt((struct desc_ptr *)&header->pmode_gdt);
+@@ -79,7 +89,7 @@ int acpi_save_state_mem(void)
+ #endif /* !CONFIG_64BIT */
+
+ header->pmode_cr0 = read_cr0();
+- header->pmode_cr4 = read_cr4();
++ header->pmode_cr4 = read_cr4_safe();
+ header->realmode_flags = acpi_realmode_flags;
+ header->real_magic = 0x12345678;
+
+@@ -89,7 +99,9 @@ int acpi_save_state_mem(void)
+ saved_magic = 0x12345678;
+ #else /* CONFIG_64BIT */
+ header->trampoline_segment = setup_trampoline() >> 4;
+- init_rsp = (unsigned long)temp_stack + 4096;
++#ifdef CONFIG_SMP
++ stack_start.sp = temp_stack + 4096;
++#endif
+ initial_code = (unsigned long)wakeup_long64;
+ saved_magic = 0x123456789abcdef0;
+ #endif /* CONFIG_64BIT */
+@@ -145,6 +157,12 @@ static int __init acpi_sleep_setup(char
+ acpi_realmode_flags |= 2;
+ if (strncmp(str, "s3_beep", 7) == 0)
+ acpi_realmode_flags |= 4;
++#ifdef CONFIG_HIBERNATION
++ if (strncmp(str, "s4_nohwsig", 10) == 0)
++ acpi_no_s4_hw_signature();
++#endif
++ if (strncmp(str, "old_ordering", 12) == 0)
++ acpi_old_suspend_ordering();
+ str = strchr(str, ',');
+ if (str != NULL)
+ str += strspn(str, ", \t");
+Index: head-2008-12-01/arch/x86/kernel/apic_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/apic_32-xen.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/apic_32-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -59,7 +59,10 @@ static cpumask_t timer_bcast_ipi;
+ /*
+ * Debug level, exported for io_apic.c
+ */
+-int apic_verbosity;
++unsigned int apic_verbosity;
++
++/* Have we found an MP table */
++int smp_found_config;
+
+ #ifndef CONFIG_XEN
+ static int modern_apic(void)
+Index: head-2008-12-01/arch/x86/kernel/apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/apic_64-xen.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/apic_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -39,7 +39,10 @@ int disable_apic;
+ /*
+ * Debug level, exported for io_apic.c
+ */
+-int apic_verbosity;
++unsigned int apic_verbosity;
++
++/* Have we found an MP table */
++int smp_found_config;
+
+ /*
+ * The guts of the apic timer interrupt
+Index: head-2008-12-01/arch/x86/kernel/asm-offsets_64.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/asm-offsets_64.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/asm-offsets_64.c 2008-12-01 11:49:07.000000000 +0100
+@@ -138,7 +138,7 @@ int main(void)
+
+ BLANK();
+ DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
+-#ifdef CONFIG_XEN
++#ifdef CONFIG_PARAVIRT_XEN
+ BLANK();
+ OFFSET(XEN_vcpu_info_mask, vcpu_info, evtchn_upcall_mask);
+ OFFSET(XEN_vcpu_info_pending, vcpu_info, evtchn_upcall_pending);
+Index: head-2008-12-01/arch/x86/kernel/cpu/amd_64.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/amd_64.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/amd_64.c 2008-12-01 11:49:07.000000000 +0100
+@@ -193,6 +193,7 @@ static void __cpuinit init_amd(struct cp
+ fam10h_check_enable_mmcfg();
+ }
+
++#ifndef CONFIG_XEN
+ if (c == &boot_cpu_data && c->x86 >= 0xf && c->x86 <= 0x11) {
+ unsigned long long tseg;
+
+@@ -211,6 +212,7 @@ static void __cpuinit init_amd(struct cp
+ set_memory_4k((unsigned long)__va(tseg), 1);
+ }
+ }
++#endif
+ }
+
+ static struct cpu_dev amd_cpu_dev __cpuinitdata = {
+Index: head-2008-12-01/arch/x86/kernel/cpu/bugs_64.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/bugs_64.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/bugs_64.c 2008-12-01 11:49:07.000000000 +0100
+@@ -20,6 +20,7 @@ void __init check_bugs(void)
+ #endif
+ alternative_instructions();
+
++#ifndef CONFIG_XEN
+ /*
+ * Make sure the first 2MB area is not mapped by huge pages
+ * There are typically fixed size MTRRs in there and overlapping
+@@ -30,4 +31,5 @@ void __init check_bugs(void)
+ */
+ if (!direct_gbpages)
+ set_memory_4k((unsigned long)__va(0), 1);
++#endif
+ }
+Index: head-2008-12-01/arch/x86/kernel/cpu/common-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/common-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -13,6 +13,7 @@
+ #include <asm/mtrr.h>
+ #include <asm/mce.h>
+ #include <asm/pat.h>
++#include <asm/asm.h>
+ #ifdef CONFIG_X86_LOCAL_APIC
+ #include <asm/mpspec.h>
+ #include <asm/apic.h>
+@@ -341,11 +342,24 @@ static void __init early_cpu_detect(void
+
+ get_cpu_vendor(c, 1);
+
++ early_get_cap(c);
++
+ if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
+ cpu_devs[c->x86_vendor]->c_early_init)
+ cpu_devs[c->x86_vendor]->c_early_init(c);
++}
+
+- early_get_cap(c);
++/*
++ * The NOPL instruction is supposed to exist on all CPUs with
++ * family >= 6; unfortunately, that's not true in practice because
++ * of early VIA chips and (more importantly) broken virtualizers that
++ * are not easy to detect. In the latter case it doesn't even *fail*
++ * reliably, so probing for it doesn't even work. Disable it completely
++ * unless we can find a reliable way to detect all the broken cases.
++ */
++static void __cpuinit detect_nopl(struct cpuinfo_x86 *c)
++{
++ clear_cpu_cap(c, X86_FEATURE_NOPL);
+ }
+
+ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
+@@ -402,8 +416,8 @@ static void __cpuinit generic_identify(s
+ }
+
+ init_scattered_cpuid_features(c);
++ detect_nopl(c);
+ }
+-
+ }
+
+ static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
+@@ -434,7 +448,7 @@ __setup("serialnumber", x86_serial_nr_se
+ /*
+ * This does the hard work of actually picking apart the CPU stuff...
+ */
+-void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
++static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+ {
+ int i;
+
+@@ -448,6 +462,8 @@ void __cpuinit identify_cpu(struct cpuin
+ c->x86_max_cores = 1;
+ c->x86_clflush_size = 32;
+ memset(&c->x86_capability, 0, sizeof c->x86_capability);
++ if (boot_cpu_has(X86_FEATURE_SYSCALL32))
++ set_cpu_cap(c, X86_FEATURE_SYSCALL32);
+
+ if (!have_cpuid_p()) {
+ /*
+Index: head-2008-12-01/arch/x86/kernel/cpu/common_64-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/arch/x86/kernel/cpu/common_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -0,0 +1,771 @@
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/string.h>
++#include <linux/bootmem.h>
++#include <linux/bitops.h>
++#include <linux/module.h>
++#include <linux/kgdb.h>
++#include <linux/topology.h>
++#include <linux/delay.h>
++#include <linux/smp.h>
++#include <linux/percpu.h>
++#include <asm/i387.h>
++#include <asm/msr.h>
++#include <asm/io.h>
++#include <asm/linkage.h>
++#include <asm/mmu_context.h>
++#include <asm/mtrr.h>
++#include <asm/mce.h>
++#include <asm/pat.h>
++#include <asm/asm.h>
++#include <asm/numa.h>
++#ifdef CONFIG_X86_LOCAL_APIC
++#include <asm/mpspec.h>
++#include <asm/apic.h>
++#include <mach_apic.h>
++#elif defined(CONFIG_XEN)
++#include <mach_apic.h>
++#endif
++#include <asm/pda.h>
++#include <asm/pgtable.h>
++#include <asm/processor.h>
++#include <asm/desc.h>
++#include <asm/atomic.h>
++#include <asm/proto.h>
++#include <asm/sections.h>
++#include <asm/setup.h>
++#include <asm/genapic.h>
++
++#include "cpu.h"
++
++/* We need valid kernel segments for data and code in long mode too
++ * IRET will check the segment types kkeil 2000/10/28
++ * Also sysret mandates a special GDT layout
++ */
++/* The TLS descriptors are currently at a different place compared to i386.
++ Hopefully nobody expects them at a fixed place (Wine?) */
++DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
++ [GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },
++ [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } },
++ [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } },
++ [GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } },
++ [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },
++ [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },
++} };
++EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
++
++__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
++
++/* Current gdt points %fs at the "master" per-cpu area: after this,
++ * it's on the real one. */
++void switch_to_new_gdt(void)
++{
++#ifndef CONFIG_XEN
++ struct desc_ptr gdt_descr;
++
++ gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
++ gdt_descr.size = GDT_SIZE - 1;
++ load_gdt(&gdt_descr);
++#else
++ void *va, *gdt_addr = get_cpu_gdt_table(smp_processor_id());
++ unsigned long frames[16];
++ unsigned int f = 0;
++
++ for (va = gdt_addr; va < gdt_addr + GDT_SIZE; va += PAGE_SIZE) {
++ frames[f++] = virt_to_mfn(va);
++ make_page_readonly(va, XENFEAT_writable_descriptor_tables);
++ }
++ if (HYPERVISOR_set_gdt(frames, GDT_SIZE / sizeof(struct desc_struct)))
++ BUG();
++#endif
++}
++
++struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
++
++static void __cpuinit default_init(struct cpuinfo_x86 *c)
++{
++ display_cacheinfo(c);
++}
++
++static struct cpu_dev __cpuinitdata default_cpu = {
++ .c_init = default_init,
++ .c_vendor = "Unknown",
++};
++static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
++
++int __cpuinit get_model_name(struct cpuinfo_x86 *c)
++{
++ unsigned int *v;
++
++ if (c->extended_cpuid_level < 0x80000004)
++ return 0;
++
++ v = (unsigned int *) c->x86_model_id;
++ cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
++ cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
++ cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
++ c->x86_model_id[48] = 0;
++ return 1;
++}
++
++
++void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
++{
++ unsigned int n, dummy, ebx, ecx, edx;
++
++ n = c->extended_cpuid_level;
++
++ if (n >= 0x80000005) {
++ cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
++ printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), "
++ "D cache %dK (%d bytes/line)\n",
++ edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
++ c->x86_cache_size = (ecx>>24) + (edx>>24);
++ /* On K8 L1 TLB is inclusive, so don't count it */
++ c->x86_tlbsize = 0;
++ }
++
++ if (n >= 0x80000006) {
++ cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
++ ecx = cpuid_ecx(0x80000006);
++ c->x86_cache_size = ecx >> 16;
++ c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
++
++ printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
++ c->x86_cache_size, ecx & 0xFF);
++ }
++}
++
++void __cpuinit detect_ht(struct cpuinfo_x86 *c)
++{
++#ifdef CONFIG_SMP
++ u32 eax, ebx, ecx, edx;
++ int index_msb, core_bits;
++
++ cpuid(1, &eax, &ebx, &ecx, &edx);
++
++
++ if (!cpu_has(c, X86_FEATURE_HT))
++ return;
++ if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
++ goto out;
++
++ smp_num_siblings = (ebx & 0xff0000) >> 16;
++
++ if (smp_num_siblings == 1) {
++ printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
++ } else if (smp_num_siblings > 1) {
++
++ if (smp_num_siblings > NR_CPUS) {
++ printk(KERN_WARNING "CPU: Unsupported number of "
++ "siblings %d", smp_num_siblings);
++ smp_num_siblings = 1;
++ return;
++ }
++
++ index_msb = get_count_order(smp_num_siblings);
++ c->phys_proc_id = phys_pkg_id(index_msb);
++
++ smp_num_siblings = smp_num_siblings / c->x86_max_cores;
++
++ index_msb = get_count_order(smp_num_siblings);
++
++ core_bits = get_count_order(c->x86_max_cores);
++
++ c->cpu_core_id = phys_pkg_id(index_msb) &
++ ((1 << core_bits) - 1);
++ }
++out:
++ if ((c->x86_max_cores * smp_num_siblings) > 1) {
++ printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
++ c->phys_proc_id);
++ printk(KERN_INFO "CPU: Processor Core ID: %d\n",
++ c->cpu_core_id);
++ }
++
++#endif
++}
++
++static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
++{
++ char *v = c->x86_vendor_id;
++ int i;
++ static int printed;
++
++ for (i = 0; i < X86_VENDOR_NUM; i++) {
++ if (cpu_devs[i]) {
++ if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
++ (cpu_devs[i]->c_ident[1] &&
++ !strcmp(v, cpu_devs[i]->c_ident[1]))) {
++ c->x86_vendor = i;
++ this_cpu = cpu_devs[i];
++ return;
++ }
++ }
++ }
++ if (!printed) {
++ printed++;
++ printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
++ printk(KERN_ERR "CPU: Your system may be unstable.\n");
++ }
++ c->x86_vendor = X86_VENDOR_UNKNOWN;
++}
++
++static void __init early_cpu_support_print(void)
++{
++ int i,j;
++ struct cpu_dev *cpu_devx;
++
++ printk("KERNEL supported cpus:\n");
++ for (i = 0; i < X86_VENDOR_NUM; i++) {
++ cpu_devx = cpu_devs[i];
++ if (!cpu_devx)
++ continue;
++ for (j = 0; j < 2; j++) {
++ if (!cpu_devx->c_ident[j])
++ continue;
++ printk(" %s %s\n", cpu_devx->c_vendor,
++ cpu_devx->c_ident[j]);
++ }
++ }
++}
++
++/*
++ * The NOPL instruction is supposed to exist on all CPUs with
++ * family >= 6, unfortunately, that's not true in practice because
++ * of early VIA chips and (more importantly) broken virtualizers that
++ * are not easy to detect. Hence, probe for it based on first
++ * principles.
++ *
++ * Note: no 64-bit chip is known to lack these, but put the code here
++ * for consistency with 32 bits, and to make it utterly trivial to
++ * diagnose the problem should it ever surface.
++ */
++static void __cpuinit detect_nopl(struct cpuinfo_x86 *c)
++{
++ const u32 nopl_signature = 0x888c53b1; /* Random number */
++ u32 has_nopl = nopl_signature;
++
++ clear_cpu_cap(c, X86_FEATURE_NOPL);
++ if (c->x86 >= 6) {
++ asm volatile("\n"
++ "1: .byte 0x0f,0x1f,0xc0\n" /* nopl %eax */
++ "2:\n"
++ " .section .fixup,\"ax\"\n"
++ "3: xor %0,%0\n"
++ " jmp 2b\n"
++ " .previous\n"
++ _ASM_EXTABLE(1b,3b)
++ : "+a" (has_nopl));
++
++ if (has_nopl == nopl_signature)
++ set_cpu_cap(c, X86_FEATURE_NOPL);
++ }
++}
++
++static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
++
++void __init early_cpu_init(void)
++{
++ struct cpu_vendor_dev *cvdev;
++
++ for (cvdev = __x86cpuvendor_start ;
++ cvdev < __x86cpuvendor_end ;
++ cvdev++)
++ cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
++ early_cpu_support_print();
++ early_identify_cpu(&boot_cpu_data);
++}
++
++/* Do some early cpuid on the boot CPU to get some parameter that are
++ needed before check_bugs. Everything advanced is in identify_cpu
++ below. */
++static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
++{
++ u32 tfms, xlvl;
++
++ c->loops_per_jiffy = loops_per_jiffy;
++ c->x86_cache_size = -1;
++ c->x86_vendor = X86_VENDOR_UNKNOWN;
++ c->x86_model = c->x86_mask = 0; /* So far unknown... */
++ c->x86_vendor_id[0] = '\0'; /* Unset */
++ c->x86_model_id[0] = '\0'; /* Unset */
++ c->x86_clflush_size = 64;
++ c->x86_cache_alignment = c->x86_clflush_size;
++ c->x86_max_cores = 1;
++ c->x86_coreid_bits = 0;
++ c->extended_cpuid_level = 0;
++ memset(&c->x86_capability, 0, sizeof c->x86_capability);
++
++ /* Get vendor name */
++ cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
++ (unsigned int *)&c->x86_vendor_id[0],
++ (unsigned int *)&c->x86_vendor_id[8],
++ (unsigned int *)&c->x86_vendor_id[4]);
++
++ get_cpu_vendor(c);
++
++ /* Initialize the standard set of capabilities */
++ /* Note that the vendor-specific code below might override */
++
++ /* Intel-defined flags: level 0x00000001 */
++ if (c->cpuid_level >= 0x00000001) {
++ __u32 misc;
++ cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
++ &c->x86_capability[0]);
++ c->x86 = (tfms >> 8) & 0xf;
++ c->x86_model = (tfms >> 4) & 0xf;
++ c->x86_mask = tfms & 0xf;
++ if (c->x86 == 0xf)
++ c->x86 += (tfms >> 20) & 0xff;
++ if (c->x86 >= 0x6)
++ c->x86_model += ((tfms >> 16) & 0xF) << 4;
++ if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
++ c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
++ } else {
++ /* Have CPUID level 0 only - unheard of */
++ c->x86 = 4;
++ }
++
++ c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;
++#ifdef CONFIG_SMP
++ c->phys_proc_id = c->initial_apicid;
++#endif
++ /* AMD-defined flags: level 0x80000001 */
++ xlvl = cpuid_eax(0x80000000);
++ c->extended_cpuid_level = xlvl;
++ if ((xlvl & 0xffff0000) == 0x80000000) {
++ if (xlvl >= 0x80000001) {
++ c->x86_capability[1] = cpuid_edx(0x80000001);
++ c->x86_capability[6] = cpuid_ecx(0x80000001);
++ }
++ if (xlvl >= 0x80000004)
++ get_model_name(c); /* Default name */
++ }
++
++ /* Transmeta-defined flags: level 0x80860001 */
++ xlvl = cpuid_eax(0x80860000);
++ if ((xlvl & 0xffff0000) == 0x80860000) {
++ /* Don't set x86_cpuid_level here for now to not confuse. */
++ if (xlvl >= 0x80860001)
++ c->x86_capability[2] = cpuid_edx(0x80860001);
++ }
++
++ if (c->extended_cpuid_level >= 0x80000007)
++ c->x86_power = cpuid_edx(0x80000007);
++
++ if (c->extended_cpuid_level >= 0x80000008) {
++ u32 eax = cpuid_eax(0x80000008);
++
++ c->x86_virt_bits = (eax >> 8) & 0xff;
++ c->x86_phys_bits = eax & 0xff;
++ }
++
++ detect_nopl(c);
++
++ if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
++ cpu_devs[c->x86_vendor]->c_early_init)
++ cpu_devs[c->x86_vendor]->c_early_init(c);
++
++ validate_pat_support(c);
++}
++
++/*
++ * This does the hard work of actually picking apart the CPU stuff...
++ */
++static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
++{
++ int i;
++
++ early_identify_cpu(c);
++
++ init_scattered_cpuid_features(c);
++
++ c->apicid = phys_pkg_id(0);
++
++ /*
++ * Vendor-specific initialization. In this section we
++ * canonicalize the feature flags, meaning if there are
++ * features a certain CPU supports which CPUID doesn't
++ * tell us, CPUID claiming incorrect flags, or other bugs,
++ * we handle them here.
++ *
++ * At the end of this section, c->x86_capability better
++ * indicate the features this CPU genuinely supports!
++ */
++ if (this_cpu->c_init)
++ this_cpu->c_init(c);
++
++ detect_ht(c);
++
++ /*
++ * On SMP, boot_cpu_data holds the common feature set between
++ * all CPUs; so make sure that we indicate which features are
++ * common between the CPUs. The first time this routine gets
++ * executed, c == &boot_cpu_data.
++ */
++ if (c != &boot_cpu_data) {
++ /* AND the already accumulated flags with these */
++ for (i = 0; i < NCAPINTS; i++)
++ boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
++ }
++
++ /* Clear all flags overriden by options */
++ for (i = 0; i < NCAPINTS; i++)
++ c->x86_capability[i] &= ~cleared_cpu_caps[i];
++
++#ifdef CONFIG_X86_MCE
++ mcheck_init(c);
++#endif
++ select_idle_routine(c);
++
++#ifdef CONFIG_NUMA
++ numa_add_cpu(smp_processor_id());
++#endif
++
++}
++
++void __cpuinit identify_boot_cpu(void)
++{
++ identify_cpu(&boot_cpu_data);
++}
++
++void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
++{
++ BUG_ON(c == &boot_cpu_data);
++ identify_cpu(c);
++ mtrr_ap_init();
++}
++
++static __init int setup_noclflush(char *arg)
++{
++ setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
++ return 1;
++}
++__setup("noclflush", setup_noclflush);
++
++void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
++{
++ if (c->x86_model_id[0])
++ printk(KERN_CONT "%s", c->x86_model_id);
++
++ if (c->x86_mask || c->cpuid_level >= 0)
++ printk(KERN_CONT " stepping %02x\n", c->x86_mask);
++ else
++ printk(KERN_CONT "\n");
++}
++
++static __init int setup_disablecpuid(char *arg)
++{
++ int bit;
++ if (get_option(&arg, &bit) && bit < NCAPINTS*32)
++ setup_clear_cpu_cap(bit);
++ else
++ return 0;
++ return 1;
++}
++__setup("clearcpuid=", setup_disablecpuid);
++
++cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
++
++struct x8664_pda **_cpu_pda __read_mostly;
++EXPORT_SYMBOL(_cpu_pda);
++
++#ifndef CONFIG_X86_NO_IDT
++struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
++#endif
++
++char boot_cpu_stack[IRQSTACKSIZE] __page_aligned_bss;
++
++unsigned long __supported_pte_mask __read_mostly = ~0UL;
++EXPORT_SYMBOL_GPL(__supported_pte_mask);
++
++static int do_not_nx __cpuinitdata;
++
++/* noexec=on|off
++Control non executable mappings for 64bit processes.
++
++on Enable(default)
++off Disable
++*/
++static int __init nonx_setup(char *str)
++{
++ if (!str)
++ return -EINVAL;
++ if (!strncmp(str, "on", 2)) {
++ __supported_pte_mask |= _PAGE_NX;
++ do_not_nx = 0;
++ } else if (!strncmp(str, "off", 3)) {
++ do_not_nx = 1;
++ __supported_pte_mask &= ~_PAGE_NX;
++ }
++ return 0;
++}
++early_param("noexec", nonx_setup);
++
++int force_personality32;
++
++/* noexec32=on|off
++Control non executable heap for 32bit processes.
++To control the stack too use noexec=off
++
++on PROT_READ does not imply PROT_EXEC for 32bit processes (default)
++off PROT_READ implies PROT_EXEC
++*/
++static int __init nonx32_setup(char *str)
++{
++ if (!strcmp(str, "on"))
++ force_personality32 &= ~READ_IMPLIES_EXEC;
++ else if (!strcmp(str, "off"))
++ force_personality32 |= READ_IMPLIES_EXEC;
++ return 1;
++}
++__setup("noexec32=", nonx32_setup);
++
++static void __init_refok switch_pt(int cpu)
++{
++#ifdef CONFIG_XEN
++ if (cpu == 0)
++ xen_init_pt();
++ xen_pt_switch(__pa_symbol(init_level4_pgt));
++ xen_new_user_pt(__pa_symbol(__user_pgd(init_level4_pgt)));
++#endif
++}
++
++void pda_init(int cpu)
++{
++ struct x8664_pda *pda = cpu_pda(cpu);
++
++ /* Setup up data that may be needed in __get_free_pages early */
++ loadsegment(fs, 0);
++ loadsegment(gs, 0);
++#ifndef CONFIG_XEN
++ /* Memory clobbers used to order PDA accessed */
++ mb();
++ wrmsrl(MSR_GS_BASE, pda);
++ mb();
++#else
++ if (HYPERVISOR_set_segment_base(SEGBASE_GS_KERNEL,
++ (unsigned long)pda))
++ BUG();
++#endif
++
++ pda->cpunumber = cpu;
++ pda->irqcount = -1;
++ pda->kernelstack = (unsigned long)stack_thread_info() -
++ PDA_STACKOFFSET + THREAD_SIZE;
++ pda->active_mm = &init_mm;
++ pda->mmu_state = 0;
++
++ if (cpu == 0) {
++ /* others are initialized in smpboot.c */
++ pda->pcurrent = &init_task;
++ pda->irqstackptr = boot_cpu_stack;
++ pda->irqstackptr += IRQSTACKSIZE - 64;
++ } else {
++ if (!pda->irqstackptr) {
++ pda->irqstackptr = (char *)
++ __get_free_pages(GFP_ATOMIC, IRQSTACK_ORDER);
++ if (!pda->irqstackptr)
++ panic("cannot allocate irqstack for cpu %d",
++ cpu);
++ pda->irqstackptr += IRQSTACKSIZE - 64;
++ }
++
++ if (pda->nodenumber == 0 && cpu_to_node(cpu) != NUMA_NO_NODE)
++ pda->nodenumber = cpu_to_node(cpu);
++ }
++
++ switch_pt(cpu);
++}
++
++#ifndef CONFIG_X86_NO_TSS
++char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ +
++ DEBUG_STKSZ] __page_aligned_bss;
++#endif
++
++extern asmlinkage void ignore_sysret(void);
++
++void __cpuinit syscall_init(void)
++{
++#ifndef CONFIG_XEN
++ /*
++ * LSTAR and STAR live in a bit strange symbiosis.
++ * They both write to the same internal register. STAR allows to
++ * set CS/DS but only a 32bit target. LSTAR sets the 64bit rip.
++ */
++ wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32);
++ wrmsrl(MSR_LSTAR, system_call);
++ wrmsrl(MSR_CSTAR, ignore_sysret);
++
++ /* Flags to clear on syscall */
++ wrmsrl(MSR_SYSCALL_MASK,
++ X86_EFLAGS_TF|X86_EFLAGS_DF|X86_EFLAGS_IF|X86_EFLAGS_IOPL);
++#endif
++#ifdef CONFIG_IA32_EMULATION
++ syscall32_cpu_init();
++#else
++ static /*const*/ struct callback_register __cpuinitdata cstar = {
++ .type = CALLBACKTYPE_syscall32,
++ .address = (unsigned long)ignore_sysret
++ };
++
++ if (HYPERVISOR_callback_op(CALLBACKOP_register, &cstar))
++ printk(KERN_WARN "Unable to register CSTAR callback\n");
++#endif
++}
++
++void __cpuinit check_efer(void)
++{
++ unsigned long efer;
++
++ rdmsrl(MSR_EFER, efer);
++ if (!(efer & EFER_NX) || do_not_nx)
++ __supported_pte_mask &= ~_PAGE_NX;
++}
++
++unsigned long kernel_eflags;
++
++#ifndef CONFIG_X86_NO_TSS
++/*
++ * Copies of the original ist values from the tss are only accessed during
++ * debugging, no special alignment required.
++ */
++DEFINE_PER_CPU(struct orig_ist, orig_ist);
++#endif
++
++/*
++ * cpu_init() initializes state that is per-CPU. Some data is already
++ * initialized (naturally) in the bootstrap process, such as the GDT
++ * and IDT. We reload them nevertheless, this function acts as a
++ * 'CPU state barrier', nothing should get across.
++ * A lot of state is already set up in PDA init.
++ */
++void __cpuinit cpu_init(void)
++{
++ int cpu = stack_smp_processor_id();
++#ifndef CONFIG_X86_NO_TSS
++ struct tss_struct *t = &per_cpu(init_tss, cpu);
++ struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
++ unsigned long v;
++ char *estacks = NULL;
++ int i;
++#endif
++ struct task_struct *me;
++
++ /* CPU 0 is initialised in head64.c */
++ if (cpu != 0)
++ pda_init(cpu);
++#ifndef CONFIG_X86_NO_TSS
++ else
++ estacks = boot_exception_stacks;
++#endif
++
++ me = current;
++
++ if (cpu_test_and_set(cpu, cpu_initialized))
++ panic("CPU#%d already initialized!\n", cpu);
++
++ printk(KERN_INFO "Initializing CPU#%d\n", cpu);
++
++ clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
++
++ /*
++ * Initialize the per-CPU GDT with the boot GDT,
++ * and set up the GDT descriptor:
++ */
++
++ switch_to_new_gdt();
++#ifndef CONFIG_X86_NO_IDT
++ load_idt((const struct desc_ptr *)&idt_descr);
++#endif
++
++ memset(me->thread.tls_array, 0, GDT_ENTRY_TLS_ENTRIES * 8);
++ syscall_init();
++
++ wrmsrl(MSR_FS_BASE, 0);
++ wrmsrl(MSR_KERNEL_GS_BASE, 0);
++ barrier();
++
++ check_efer();
++
++#ifndef CONFIG_X86_NO_TSS
++ /*
++ * set up and load the per-CPU TSS
++ */
++ if (!orig_ist->ist[0]) {
++ static const unsigned int order[N_EXCEPTION_STACKS] = {
++ [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
++ [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
++ };
++ for (v = 0; v < N_EXCEPTION_STACKS; v++) {
++ if (cpu) {
++ estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
++ if (!estacks)
++ panic("Cannot allocate exception "
++ "stack %ld %d\n", v, cpu);
++ }
++ estacks += PAGE_SIZE << order[v];
++ orig_ist->ist[v] = t->x86_tss.ist[v] =
++ (unsigned long)estacks;
++ }
++ }
++
++ t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
++ /*
++ * <= is required because the CPU will access up to
++ * 8 bits beyond the end of the IO permission bitmap.
++ */
++ for (i = 0; i <= IO_BITMAP_LONGS; i++)
++ t->io_bitmap[i] = ~0UL;
++#endif
++
++ atomic_inc(&init_mm.mm_count);
++ me->active_mm = &init_mm;
++ if (me->mm)
++ BUG();
++ enter_lazy_tlb(&init_mm, me);
++
++ load_sp0(t, ¤t->thread);
++#ifndef CONFIG_X86_NO_TSS
++ set_tss_desc(cpu, t);
++ load_TR_desc();
++#endif
++ load_LDT(&init_mm.context);
++
++#ifdef CONFIG_KGDB
++ /*
++ * If the kgdb is connected no debug regs should be altered. This
++ * is only applicable when KGDB and a KGDB I/O module are built
++ * into the kernel and you are using early debugging with
++ * kgdbwait. KGDB will control the kernel HW breakpoint registers.
++ */
++ if (kgdb_connected && arch_kgdb_ops.correct_hw_break)
++ arch_kgdb_ops.correct_hw_break();
++ else {
++#endif
++ /*
++ * Clear all 6 debug registers:
++ */
++
++ set_debugreg(0UL, 0);
++ set_debugreg(0UL, 1);
++ set_debugreg(0UL, 2);
++ set_debugreg(0UL, 3);
++ set_debugreg(0UL, 6);
++ set_debugreg(0UL, 7);
++#ifdef CONFIG_KGDB
++ /* If the kgdb is connected no debug regs should be altered. */
++ }
++#endif
++
++ fpu_init();
++
++ asm ("pushfq; popq %0" : "=rm" (kernel_eflags));
++ if (raw_irqs_disabled())
++ kernel_eflags &= ~X86_EFLAGS_IF;
++
++ if (is_uv_system())
++ uv_cpu_init();
++}
+Index: head-2008-12-01/arch/x86/kernel/e820-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/arch/x86/kernel/e820-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -0,0 +1,1470 @@
++/*
++ * Handle the memory map.
++ * The functions here do the job until bootmem takes over.
++ *
++ * Getting sanitize_e820_map() in sync with i386 version by applying change:
++ * - Provisions for empty E820 memory regions (reported by certain BIOSes).
++ * Alex Achenbach <xela@slit.de>, December 2002.
++ * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
++ *
++ */
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/init.h>
++#include <linux/bootmem.h>
++#include <linux/ioport.h>
++#include <linux/string.h>
++#include <linux/kexec.h>
++#include <linux/module.h>
++#include <linux/mm.h>
++#include <linux/pfn.h>
++#include <linux/suspend.h>
++#include <linux/firmware-map.h>
++
++#include <asm/pgtable.h>
++#include <asm/page.h>
++#include <asm/e820.h>
++#include <asm/proto.h>
++#include <asm/setup.h>
++#include <xen/interface/memory.h>
++
++/*
++ * The e820 map is the map that gets modified e.g. with command line parameters
++ * and that is also registered with modifications in the kernel resource tree
++ * with the iomem_resource as parent.
++ *
++ * The e820_saved is directly saved after the BIOS-provided memory map is
++ * copied. It doesn't get modified afterwards. It's registered for the
++ * /sys/firmware/memmap interface.
++ *
++ * That memory map is not modified and is used as base for kexec. The kexec'd
++ * kernel should get the same memory map as the firmware provides. Then the
++ * user can e.g. boot the original kernel with mem=1G while still booting the
++ * next kernel with full memory.
++ */
++struct e820map e820;
++struct e820map e820_saved;
++#ifdef CONFIG_XEN
++static struct e820map machine_e820;
++#endif
++
++/* For PCI or other memory-mapped resources */
++unsigned long pci_mem_start = 0xaeedbabe;
++#ifdef CONFIG_PCI
++EXPORT_SYMBOL(pci_mem_start);
++#endif
++
++/*
++ * This function checks if any part of the range <start,end> is mapped
++ * with type.
++ */
++int
++e820_any_mapped(u64 start, u64 end, unsigned type)
++{
++ int i;
++
++#ifndef CONFIG_XEN
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++#else
++ if (!is_initial_xendomain())
++ return 0;
++ for (i = 0; i < machine_e820.nr_map; ++i) {
++ const struct e820entry *ei = &machine_e820.map[i];
++#endif
++
++ if (type && ei->type != type)
++ continue;
++ if (ei->addr >= end || ei->addr + ei->size <= start)
++ continue;
++ return 1;
++ }
++ return 0;
++}
++EXPORT_SYMBOL_GPL(e820_any_mapped);
++
++/*
++ * This function checks if the entire range <start,end> is mapped with type.
++ *
++ * Note: this function only works correct if the e820 table is sorted and
++ * not-overlapping, which is the case
++ */
++int __init e820_all_mapped(u64 start, u64 end, unsigned type)
++{
++ int i;
++
++#ifndef CONFIG_XEN
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++#else
++ if (!is_initial_xendomain())
++ return 0;
++ for (i = 0; i < machine_e820.nr_map; ++i) {
++ const struct e820entry *ei = &machine_e820.map[i];
++#endif
++
++ if (type && ei->type != type)
++ continue;
++ /* is the region (part) in overlap with the current region ?*/
++ if (ei->addr >= end || ei->addr + ei->size <= start)
++ continue;
++
++ /* if the region is at the beginning of <start,end> we move
++ * start to the end of the region since it's ok until there
++ */
++ if (ei->addr <= start)
++ start = ei->addr + ei->size;
++ /*
++ * if start is now at or beyond end, we're done, full
++ * coverage
++ */
++ if (start >= end)
++ return 1;
++ }
++ return 0;
++}
++
++/*
++ * Add a memory region to the kernel e820 map.
++ */
++void __init e820_add_region(u64 start, u64 size, int type)
++{
++ int x = e820.nr_map;
++
++ if (x == ARRAY_SIZE(e820.map)) {
++ printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
++ return;
++ }
++
++ e820.map[x].addr = start;
++ e820.map[x].size = size;
++ e820.map[x].type = type;
++ e820.nr_map++;
++}
++
++void __init e820_print_map(char *who)
++{
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ printk(KERN_INFO " %s: %016Lx - %016Lx ", who,
++ (unsigned long long) e820.map[i].addr,
++ (unsigned long long)
++ (e820.map[i].addr + e820.map[i].size));
++ switch (e820.map[i].type) {
++ case E820_RAM:
++ case E820_RESERVED_KERN:
++ printk(KERN_CONT "(usable)\n");
++ break;
++ case E820_RESERVED:
++ printk(KERN_CONT "(reserved)\n");
++ break;
++ case E820_ACPI:
++ printk(KERN_CONT "(ACPI data)\n");
++ break;
++ case E820_NVS:
++ printk(KERN_CONT "(ACPI NVS)\n");
++ break;
++ default:
++ printk(KERN_CONT "type %u\n", e820.map[i].type);
++ break;
++ }
++ }
++}
++
++/*
++ * Sanitize the BIOS e820 map.
++ *
++ * Some e820 responses include overlapping entries. The following
++ * replaces the original e820 map with a new one, removing overlaps,
++ * and resolving conflicting memory types in favor of highest
++ * numbered type.
++ *
++ * The input parameter biosmap points to an array of 'struct
++ * e820entry' which on entry has elements in the range [0, *pnr_map)
++ * valid, and which has space for up to max_nr_map entries.
++ * On return, the resulting sanitized e820 map entries will be in
++ * overwritten in the same location, starting at biosmap.
++ *
++ * The integer pointed to by pnr_map must be valid on entry (the
++ * current number of valid entries located at biosmap) and will
++ * be updated on return, with the new number of valid entries
++ * (something no more than max_nr_map.)
++ *
++ * The return value from sanitize_e820_map() is zero if it
++ * successfully 'sanitized' the map entries passed in, and is -1
++ * if it did nothing, which can happen if either of (1) it was
++ * only passed one map entry, or (2) any of the input map entries
++ * were invalid (start + size < start, meaning that the size was
++ * so big the described memory range wrapped around through zero.)
++ *
++ * Visually we're performing the following
++ * (1,2,3,4 = memory types)...
++ *
++ * Sample memory map (w/overlaps):
++ * ____22__________________
++ * ______________________4_
++ * ____1111________________
++ * _44_____________________
++ * 11111111________________
++ * ____________________33__
++ * ___________44___________
++ * __________33333_________
++ * ______________22________
++ * ___________________2222_
++ * _________111111111______
++ * _____________________11_
++ * _________________4______
++ *
++ * Sanitized equivalent (no overlap):
++ * 1_______________________
++ * _44_____________________
++ * ___1____________________
++ * ____22__________________
++ * ______11________________
++ * _________1______________
++ * __________3_____________
++ * ___________44___________
++ * _____________33_________
++ * _______________2________
++ * ________________1_______
++ * _________________4______
++ * ___________________2____
++ * ____________________33__
++ * ______________________4_
++ */
++
++int __init sanitize_e820_map(struct e820entry *biosmap, int max_nr_map,
++ int *pnr_map)
++{
++ struct change_member {
++ struct e820entry *pbios; /* pointer to original bios entry */
++ unsigned long long addr; /* address for this change point */
++ };
++ static struct change_member change_point_list[2*E820_X_MAX] __initdata;
++ static struct change_member *change_point[2*E820_X_MAX] __initdata;
++ static struct e820entry *overlap_list[E820_X_MAX] __initdata;
++ static struct e820entry new_bios[E820_X_MAX] __initdata;
++ struct change_member *change_tmp;
++ unsigned long current_type, last_type;
++ unsigned long long last_addr;
++ int chgidx, still_changing;
++ int overlap_entries;
++ int new_bios_entry;
++ int old_nr, new_nr, chg_nr;
++ int i;
++
++ /* if there's only one memory region, don't bother */
++#ifdef CONFIG_XEN
++ if (*pnr_map == 1)
++ return 0;
++#endif
++ if (*pnr_map < 2)
++ return -1;
++
++ old_nr = *pnr_map;
++ BUG_ON(old_nr > max_nr_map);
++
++ /* bail out if we find any unreasonable addresses in bios map */
++ for (i = 0; i < old_nr; i++)
++ if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
++ return -1;
++
++ /* create pointers for initial change-point information (for sorting) */
++ for (i = 0; i < 2 * old_nr; i++)
++ change_point[i] = &change_point_list[i];
++
++ /* record all known change-points (starting and ending addresses),
++ omitting those that are for empty memory regions */
++ chgidx = 0;
++ for (i = 0; i < old_nr; i++) {
++ if (biosmap[i].size != 0) {
++ change_point[chgidx]->addr = biosmap[i].addr;
++ change_point[chgidx++]->pbios = &biosmap[i];
++ change_point[chgidx]->addr = biosmap[i].addr +
++ biosmap[i].size;
++ change_point[chgidx++]->pbios = &biosmap[i];
++ }
++ }
++ chg_nr = chgidx;
++
++ /* sort change-point list by memory addresses (low -> high) */
++ still_changing = 1;
++ while (still_changing) {
++ still_changing = 0;
++ for (i = 1; i < chg_nr; i++) {
++ unsigned long long curaddr, lastaddr;
++ unsigned long long curpbaddr, lastpbaddr;
++
++ curaddr = change_point[i]->addr;
++ lastaddr = change_point[i - 1]->addr;
++ curpbaddr = change_point[i]->pbios->addr;
++ lastpbaddr = change_point[i - 1]->pbios->addr;
++
++ /*
++ * swap entries, when:
++ *
++ * curaddr > lastaddr or
++ * curaddr == lastaddr and curaddr == curpbaddr and
++ * lastaddr != lastpbaddr
++ */
++ if (curaddr < lastaddr ||
++ (curaddr == lastaddr && curaddr == curpbaddr &&
++ lastaddr != lastpbaddr)) {
++ change_tmp = change_point[i];
++ change_point[i] = change_point[i-1];
++ change_point[i-1] = change_tmp;
++ still_changing = 1;
++ }
++ }
++ }
++
++ /* create a new bios memory map, removing overlaps */
++ overlap_entries = 0; /* number of entries in the overlap table */
++ new_bios_entry = 0; /* index for creating new bios map entries */
++ last_type = 0; /* start with undefined memory type */
++ last_addr = 0; /* start with 0 as last starting address */
++
++ /* loop through change-points, determining affect on the new bios map */
++ for (chgidx = 0; chgidx < chg_nr; chgidx++) {
++ /* keep track of all overlapping bios entries */
++ if (change_point[chgidx]->addr ==
++ change_point[chgidx]->pbios->addr) {
++ /*
++ * add map entry to overlap list (> 1 entry
++ * implies an overlap)
++ */
++ overlap_list[overlap_entries++] =
++ change_point[chgidx]->pbios;
++ } else {
++ /*
++ * remove entry from list (order independent,
++ * so swap with last)
++ */
++ for (i = 0; i < overlap_entries; i++) {
++ if (overlap_list[i] ==
++ change_point[chgidx]->pbios)
++ overlap_list[i] =
++ overlap_list[overlap_entries-1];
++ }
++ overlap_entries--;
++ }
++ /*
++ * if there are overlapping entries, decide which
++ * "type" to use (larger value takes precedence --
++ * 1=usable, 2,3,4,4+=unusable)
++ */
++ current_type = 0;
++ for (i = 0; i < overlap_entries; i++)
++ if (overlap_list[i]->type > current_type)
++ current_type = overlap_list[i]->type;
++ /*
++ * continue building up new bios map based on this
++ * information
++ */
++ if (current_type != last_type) {
++ if (last_type != 0) {
++ new_bios[new_bios_entry].size =
++ change_point[chgidx]->addr - last_addr;
++ /*
++ * move forward only if the new size
++ * was non-zero
++ */
++ if (new_bios[new_bios_entry].size != 0)
++ /*
++ * no more space left for new
++ * bios entries ?
++ */
++ if (++new_bios_entry >= max_nr_map)
++ break;
++ }
++ if (current_type != 0) {
++ new_bios[new_bios_entry].addr =
++ change_point[chgidx]->addr;
++ new_bios[new_bios_entry].type = current_type;
++ last_addr = change_point[chgidx]->addr;
++ }
++ last_type = current_type;
++ }
++ }
++ /* retain count for new bios entries */
++ new_nr = new_bios_entry;
++
++ /* copy new bios mapping into original location */
++ memcpy(biosmap, new_bios, new_nr * sizeof(struct e820entry));
++ *pnr_map = new_nr;
++
++ return 0;
++}
++
++static int __init __append_e820_map(struct e820entry *biosmap, int nr_map)
++{
++ while (nr_map) {
++ u64 start = biosmap->addr;
++ u64 size = biosmap->size;
++ u64 end = start + size;
++ u32 type = biosmap->type;
++
++ /* Overflow in 64 bits? Ignore the memory map. */
++ if (start > end)
++ return -1;
++
++ e820_add_region(start, size, type);
++
++ biosmap++;
++ nr_map--;
++ }
++ return 0;
++}
++
++/*
++ * Copy the BIOS e820 map into a safe place.
++ *
++ * Sanity-check it while we're at it..
++ *
++ * If we're lucky and live on a modern system, the setup code
++ * will have given us a memory map that we can use to properly
++ * set up memory. If we aren't, we'll fake a memory map.
++ */
++static int __init append_e820_map(struct e820entry *biosmap, int nr_map)
++{
++#ifndef CONFIG_XEN
++ /* Only one memory region (or negative)? Ignore it */
++ if (nr_map < 2)
++ return -1;
++#else
++ BUG_ON(nr_map < 1);
++#endif
++
++ return __append_e820_map(biosmap, nr_map);
++}
++
++static u64 __init e820_update_range_map(struct e820map *e820x, u64 start,
++ u64 size, unsigned old_type,
++ unsigned new_type)
++{
++ int i;
++ u64 real_updated_size = 0;
++
++ BUG_ON(old_type == new_type);
++
++ if (size > (ULLONG_MAX - start))
++ size = ULLONG_MAX - start;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820x->map[i];
++ u64 final_start, final_end;
++ if (ei->type != old_type)
++ continue;
++ /* totally covered? */
++ if (ei->addr >= start &&
++ (ei->addr + ei->size) <= (start + size)) {
++ ei->type = new_type;
++ real_updated_size += ei->size;
++ continue;
++ }
++ /* partially covered */
++ final_start = max(start, ei->addr);
++ final_end = min(start + size, ei->addr + ei->size);
++ if (final_start >= final_end)
++ continue;
++ e820_add_region(final_start, final_end - final_start,
++ new_type);
++ real_updated_size += final_end - final_start;
++
++ ei->size -= final_end - final_start;
++ if (ei->addr < final_start)
++ continue;
++ ei->addr = final_end;
++ }
++ return real_updated_size;
++}
++
++u64 __init e820_update_range(u64 start, u64 size, unsigned old_type,
++ unsigned new_type)
++{
++ return e820_update_range_map(&e820, start, size, old_type, new_type);
++}
++
++static u64 __init e820_update_range_saved(u64 start, u64 size,
++ unsigned old_type, unsigned new_type)
++{
++ return e820_update_range_map(&e820_saved, start, size, old_type,
++ new_type);
++}
++
++/* make e820 not cover the range */
++u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type,
++ int checktype)
++{
++ int i;
++ u64 real_removed_size = 0;
++
++ if (size > (ULLONG_MAX - start))
++ size = ULLONG_MAX - start;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ u64 final_start, final_end;
++
++ if (checktype && ei->type != old_type)
++ continue;
++ /* totally covered? */
++ if (ei->addr >= start &&
++ (ei->addr + ei->size) <= (start + size)) {
++ real_removed_size += ei->size;
++ memset(ei, 0, sizeof(struct e820entry));
++ continue;
++ }
++ /* partially covered */
++ final_start = max(start, ei->addr);
++ final_end = min(start + size, ei->addr + ei->size);
++ if (final_start >= final_end)
++ continue;
++ real_removed_size += final_end - final_start;
++
++ ei->size -= final_end - final_start;
++ if (ei->addr < final_start)
++ continue;
++ ei->addr = final_end;
++ }
++ return real_removed_size;
++}
++
++void __init update_e820(void)
++{
++ int nr_map;
++
++ nr_map = e820.nr_map;
++ if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &nr_map))
++ return;
++ e820.nr_map = nr_map;
++ printk(KERN_INFO "modified physical RAM map:\n");
++ e820_print_map("modified");
++}
++static void __init update_e820_saved(void)
++{
++ int nr_map;
++
++ nr_map = e820_saved.nr_map;
++ if (sanitize_e820_map(e820_saved.map, ARRAY_SIZE(e820_saved.map), &nr_map))
++ return;
++ e820_saved.nr_map = nr_map;
++}
++
++#ifdef CONFIG_XEN
++#define e820 machine_e820
++#endif
++
++#define MAX_GAP_END 0x100000000ull
++/*
++ * Search for a gap in the e820 memory space from start_addr to end_addr.
++ */
++__init int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize,
++ unsigned long start_addr, unsigned long long end_addr)
++{
++ unsigned long long last;
++ int i = e820.nr_map;
++ int found = 0;
++
++ last = (end_addr && end_addr < MAX_GAP_END) ? end_addr : MAX_GAP_END;
++#ifdef CONFIG_X86_64
++ if (start_addr >= MAX_GAP_END)
++ last = end_addr ?: (1UL << boot_cpu_data.x86_phys_bits);
++#endif
++
++ while (--i >= 0) {
++ unsigned long long start = e820.map[i].addr;
++ unsigned long long end = start + e820.map[i].size;
++
++ if (end < start_addr)
++ continue;
++
++ /*
++ * Since "last" is at most 4GB, we know we'll
++ * fit in 32 bits if this condition is true
++ */
++ if (last > end) {
++ unsigned long gap = last - end;
++
++ if (gap >= *gapsize) {
++ *gapsize = gap;
++ *gapstart = end;
++ found = 1;
++ }
++ }
++ if (start < last)
++ last = start;
++ }
++ return found;
++}
++
++/*
++ * Search for the biggest gap in the low 32 bits of the e820
++ * memory space. We pass this space to PCI to assign MMIO resources
++ * for hotplug or unconfigured devices in.
++ * Hopefully the BIOS let enough space left.
++ */
++__init void e820_setup_gap(void)
++{
++ unsigned long gapstart, gapsize, round;
++ int found;
++
++ gapstart = 0x10000000;
++ gapsize = 0x400000;
++ found = e820_search_gap(&gapstart, &gapsize, 0, MAX_GAP_END);
++
++#ifdef CONFIG_X86_64
++ if (!found) {
++ printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit "
++ "address range\n"
++ KERN_ERR "PCI: Unassigned devices with 32bit resource "
++ "registers may break!\n");
++ found = e820_search_gap(&gapstart, &gapsize, MAX_GAP_END, 0);
++ BUG_ON(!found);
++ }
++#endif
++
++ /*
++ * See how much we want to round up: start off with
++ * rounding to the next 1MB area.
++ */
++ round = 0x100000;
++ while ((gapsize >> 4) > round)
++ round += round;
++ /* Fun with two's complement */
++ pci_mem_start = (gapstart + round) & -round;
++
++ printk(KERN_INFO
++ "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
++ pci_mem_start, gapstart, gapsize);
++}
++
++#undef e820
++
++#ifndef CONFIG_XEN
++/**
++ * Because of the size limitation of struct boot_params, only first
++ * 128 E820 memory entries are passed to kernel via
++ * boot_params.e820_map, others are passed via SETUP_E820_EXT node of
++ * linked list of struct setup_data, which is parsed here.
++ */
++void __init parse_e820_ext(struct setup_data *sdata, unsigned long pa_data)
++{
++ u32 map_len;
++ int entries;
++ struct e820entry *extmap;
++
++ entries = sdata->len / sizeof(struct e820entry);
++ map_len = sdata->len + sizeof(struct setup_data);
++ if (map_len > PAGE_SIZE)
++ sdata = early_ioremap(pa_data, map_len);
++ extmap = (struct e820entry *)(sdata->data);
++ __append_e820_map(extmap, entries);
++ sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
++ if (map_len > PAGE_SIZE)
++ early_iounmap(sdata, map_len);
++ printk(KERN_INFO "extended physical RAM map:\n");
++ e820_print_map("extended");
++}
++
++#if defined(CONFIG_X86_64) || \
++ (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
++/**
++ * Find the ranges of physical addresses that do not correspond to
++ * e820 RAM areas and mark the corresponding pages as nosave for
++ * hibernation (32 bit) or software suspend and suspend to RAM (64 bit).
++ *
++ * This function requires the e820 map to be sorted and without any
++ * overlapping entries and assumes the first e820 area to be RAM.
++ */
++void __init e820_mark_nosave_regions(unsigned long limit_pfn)
++{
++ int i;
++ unsigned long pfn;
++
++ pfn = PFN_DOWN(e820.map[0].addr + e820.map[0].size);
++ for (i = 1; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++
++ if (pfn < PFN_UP(ei->addr))
++ register_nosave_region(pfn, PFN_UP(ei->addr));
++
++ pfn = PFN_DOWN(ei->addr + ei->size);
++ if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN)
++ register_nosave_region(PFN_UP(ei->addr), pfn);
++
++ if (pfn >= limit_pfn)
++ break;
++ }
++}
++#endif
++#endif
++
++/*
++ * Early reserved memory areas.
++ */
++#define MAX_EARLY_RES 20
++
++struct early_res {
++ u64 start, end;
++ char name[16];
++ char overlap_ok;
++};
++static struct early_res early_res[MAX_EARLY_RES] __initdata = {
++#ifndef CONFIG_XEN
++ { 0, PAGE_SIZE, "BIOS data page" }, /* BIOS data page */
++#if defined(CONFIG_X86_64) && defined(CONFIG_X86_TRAMPOLINE)
++ { TRAMPOLINE_BASE, TRAMPOLINE_BASE + 2 * PAGE_SIZE, "TRAMPOLINE" },
++#endif
++#if defined(CONFIG_X86_32) && defined(CONFIG_SMP)
++ /*
++ * But first pinch a few for the stack/trampoline stuff
++ * FIXME: Don't need the extra page at 4K, but need to fix
++ * trampoline before removing it. (see the GDT stuff)
++ */
++ { PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE" },
++ /*
++ * Has to be in very low memory so we can execute
++ * real-mode AP code.
++ */
++ { TRAMPOLINE_BASE, TRAMPOLINE_BASE + PAGE_SIZE, "TRAMPOLINE" },
++#endif
++#endif
++ {}
++};
++
++static int __init find_overlapped_early(u64 start, u64 end)
++{
++ int i;
++ struct early_res *r;
++
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
++ r = &early_res[i];
++ if (end > r->start && start < r->end)
++ break;
++ }
++
++ return i;
++}
++
++/*
++ * Drop the i-th range from the early reservation map,
++ * by copying any higher ranges down one over it, and
++ * clearing what had been the last slot.
++ */
++static void __init drop_range(int i)
++{
++ int j;
++
++ for (j = i + 1; j < MAX_EARLY_RES && early_res[j].end; j++)
++ ;
++
++ memmove(&early_res[i], &early_res[i + 1],
++ (j - 1 - i) * sizeof(struct early_res));
++
++ early_res[j - 1].end = 0;
++}
++
++/*
++ * Split any existing ranges that:
++ * 1) are marked 'overlap_ok', and
++ * 2) overlap with the stated range [start, end)
++ * into whatever portion (if any) of the existing range is entirely
++ * below or entirely above the stated range. Drop the portion
++ * of the existing range that overlaps with the stated range,
++ * which will allow the caller of this routine to then add that
++ * stated range without conflicting with any existing range.
++ */
++static void __init drop_overlaps_that_are_ok(u64 start, u64 end)
++{
++ int i;
++ struct early_res *r;
++ u64 lower_start, lower_end;
++ u64 upper_start, upper_end;
++ char name[16];
++
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
++ r = &early_res[i];
++
++ /* Continue past non-overlapping ranges */
++ if (end <= r->start || start >= r->end)
++ continue;
++
++ /*
++ * Leave non-ok overlaps as is; let caller
++ * panic "Overlapping early reservations"
++ * when it hits this overlap.
++ */
++ if (!r->overlap_ok)
++ return;
++
++ /*
++ * We have an ok overlap. We will drop it from the early
++ * reservation map, and add back in any non-overlapping
++ * portions (lower or upper) as separate, overlap_ok,
++ * non-overlapping ranges.
++ */
++
++ /* 1. Note any non-overlapping (lower or upper) ranges. */
++ strncpy(name, r->name, sizeof(name) - 1);
++
++ lower_start = lower_end = 0;
++ upper_start = upper_end = 0;
++ if (r->start < start) {
++ lower_start = r->start;
++ lower_end = start;
++ }
++ if (r->end > end) {
++ upper_start = end;
++ upper_end = r->end;
++ }
++
++ /* 2. Drop the original ok overlapping range */
++ drop_range(i);
++
++ i--; /* resume for-loop on copied down entry */
++
++ /* 3. Add back in any non-overlapping ranges. */
++ if (lower_end)
++ reserve_early_overlap_ok(lower_start, lower_end, name);
++ if (upper_end)
++ reserve_early_overlap_ok(upper_start, upper_end, name);
++ }
++}
++
++static void __init __reserve_early(u64 start, u64 end, char *name,
++ int overlap_ok)
++{
++ int i;
++ struct early_res *r;
++
++ i = find_overlapped_early(start, end);
++ if (i >= MAX_EARLY_RES)
++ panic("Too many early reservations");
++ r = &early_res[i];
++ if (r->end)
++ panic("Overlapping early reservations "
++ "%llx-%llx %s to %llx-%llx %s\n",
++ start, end - 1, name?name:"", r->start,
++ r->end - 1, r->name);
++ r->start = start;
++ r->end = end;
++ r->overlap_ok = overlap_ok;
++ if (name)
++ strncpy(r->name, name, sizeof(r->name) - 1);
++}
++
++/*
++ * A few early reservtations come here.
++ *
++ * The 'overlap_ok' in the name of this routine does -not- mean it
++ * is ok for these reservations to overlap an earlier reservation.
++ * Rather it means that it is ok for subsequent reservations to
++ * overlap this one.
++ *
++ * Use this entry point to reserve early ranges when you are doing
++ * so out of "Paranoia", reserving perhaps more memory than you need,
++ * just in case, and don't mind a subsequent overlapping reservation
++ * that is known to be needed.
++ *
++ * The drop_overlaps_that_are_ok() call here isn't really needed.
++ * It would be needed if we had two colliding 'overlap_ok'
++ * reservations, so that the second such would not panic on the
++ * overlap with the first. We don't have any such as of this
++ * writing, but might as well tolerate such if it happens in
++ * the future.
++ */
++void __init reserve_early_overlap_ok(u64 start, u64 end, char *name)
++{
++ drop_overlaps_that_are_ok(start, end);
++ __reserve_early(start, end, name, 1);
++}
++
++/*
++ * Most early reservations come here.
++ *
++ * We first have drop_overlaps_that_are_ok() drop any pre-existing
++ * 'overlap_ok' ranges, so that we can then reserve this memory
++ * range without risk of panic'ing on an overlapping overlap_ok
++ * early reservation.
++ */
++void __init reserve_early(u64 start, u64 end, char *name)
++{
++ drop_overlaps_that_are_ok(start, end);
++ __reserve_early(start, end, name, 0);
++}
++
++void __init free_early(u64 start, u64 end)
++{
++ struct early_res *r;
++ int i;
++
++ i = find_overlapped_early(start, end);
++ r = &early_res[i];
++ if (i >= MAX_EARLY_RES || r->end != end || r->start != start)
++ panic("free_early on not reserved area: %llx-%llx!",
++ start, end - 1);
++
++ drop_range(i);
++}
++
++void __init early_res_to_bootmem(u64 start, u64 end)
++{
++ int i, count;
++ u64 final_start, final_end;
++
++ count = 0;
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++)
++ count++;
++
++ printk(KERN_INFO "(%d early reservations) ==> bootmem [%010llx - %010llx]\n",
++ count, start, end);
++ for (i = 0; i < count; i++) {
++ struct early_res *r = &early_res[i];
++ printk(KERN_INFO " #%d [%010llx - %010llx] %16s", i,
++ r->start, r->end, r->name);
++ final_start = max(start, r->start);
++ final_end = min(end, r->end);
++ if (final_start >= final_end) {
++ printk(KERN_CONT "\n");
++ continue;
++ }
++ printk(KERN_CONT " ==> [%010llx - %010llx]\n",
++ final_start, final_end);
++ reserve_bootmem_generic(final_start, final_end - final_start,
++ BOOTMEM_DEFAULT);
++ }
++}
++
++/* Check for already reserved areas */
++static inline int __init bad_addr(u64 *addrp, u64 size, u64 align)
++{
++ int i;
++ u64 addr = *addrp;
++ int changed = 0;
++ struct early_res *r;
++again:
++ i = find_overlapped_early(addr, addr + size);
++ r = &early_res[i];
++ if (i < MAX_EARLY_RES && r->end) {
++ *addrp = addr = round_up(r->end, align);
++ changed = 1;
++ goto again;
++ }
++ return changed;
++}
++
++/* Check for already reserved areas */
++static inline int __init bad_addr_size(u64 *addrp, u64 *sizep, u64 align)
++{
++ int i;
++ u64 addr = *addrp, last;
++ u64 size = *sizep;
++ int changed = 0;
++again:
++ last = addr + size;
++ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
++ struct early_res *r = &early_res[i];
++ if (last > r->start && addr < r->start) {
++ size = r->start - addr;
++ changed = 1;
++ goto again;
++ }
++ if (last > r->end && addr < r->end) {
++ addr = round_up(r->end, align);
++ size = last - addr;
++ changed = 1;
++ goto again;
++ }
++ if (last <= r->end && addr >= r->start) {
++ (*sizep)++;
++ return 0;
++ }
++ }
++ if (changed) {
++ *addrp = addr;
++ *sizep = size;
++ }
++ return changed;
++}
++
++/*
++ * Find a free area with specified alignment in a specific range.
++ */
++u64 __init find_e820_area(u64 start, u64 end, u64 size, u64 align)
++{
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ u64 addr, last;
++ u64 ei_last;
++
++ if (ei->type != E820_RAM)
++ continue;
++ addr = round_up(ei->addr, align);
++ ei_last = ei->addr + ei->size;
++ if (addr < start)
++ addr = round_up(start, align);
++ if (addr >= ei_last)
++ continue;
++ while (bad_addr(&addr, size, align) && addr+size <= ei_last)
++ ;
++ last = addr + size;
++ if (last > ei_last)
++ continue;
++ if (last > end)
++ continue;
++ return addr;
++ }
++ return -1ULL;
++}
++
++/*
++ * Find next free range after *start
++ */
++u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align)
++{
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ u64 addr, last;
++ u64 ei_last;
++
++ if (ei->type != E820_RAM)
++ continue;
++ addr = round_up(ei->addr, align);
++ ei_last = ei->addr + ei->size;
++ if (addr < start)
++ addr = round_up(start, align);
++ if (addr >= ei_last)
++ continue;
++ *sizep = ei_last - addr;
++ while (bad_addr_size(&addr, sizep, align) &&
++ addr + *sizep <= ei_last)
++ ;
++ last = addr + *sizep;
++ if (last > ei_last)
++ continue;
++ return addr;
++ }
++ return -1UL;
++
++}
++
++/*
++ * pre allocated 4k and reserved it in e820
++ */
++u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
++{
++ u64 size = 0;
++ u64 addr;
++ u64 start;
++
++ start = startt;
++ while (size < sizet)
++ start = find_e820_area_size(start, &size, align);
++
++ if (size < sizet)
++ return 0;
++
++ addr = round_down(start + size - sizet, align);
++ e820_update_range(addr, sizet, E820_RAM, E820_RESERVED);
++ e820_update_range_saved(addr, sizet, E820_RAM, E820_RESERVED);
++ printk(KERN_INFO "update e820 for early_reserve_e820\n");
++ update_e820();
++ update_e820_saved();
++
++ return addr;
++}
++
++#ifdef CONFIG_X86_32
++# ifdef CONFIG_X86_PAE
++# define MAX_ARCH_PFN (1ULL<<(40-PAGE_SHIFT))
++# else
++# define MAX_ARCH_PFN (1ULL<<(32-PAGE_SHIFT))
++# endif
++#else /* CONFIG_X86_32 */
++# define MAX_ARCH_PFN MAXMEM>>PAGE_SHIFT
++#endif
++
++/*
++ * Find the highest page frame number we have available
++ */
++static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
++{
++ int i;
++ unsigned long last_pfn = 0;
++ unsigned long max_arch_pfn = MAX_ARCH_PFN;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ struct e820entry *ei = &e820.map[i];
++ unsigned long start_pfn;
++ unsigned long end_pfn;
++
++ if (ei->type != type)
++ continue;
++
++ start_pfn = ei->addr >> PAGE_SHIFT;
++ end_pfn = (ei->addr + ei->size) >> PAGE_SHIFT;
++
++ if (start_pfn >= limit_pfn)
++ continue;
++ if (end_pfn > limit_pfn) {
++ last_pfn = limit_pfn;
++ break;
++ }
++ if (end_pfn > last_pfn)
++ last_pfn = end_pfn;
++ }
++
++ if (last_pfn > max_arch_pfn)
++ last_pfn = max_arch_pfn;
++
++ printk(KERN_INFO "last_pfn = %#lx max_arch_pfn = %#lx\n",
++ last_pfn, max_arch_pfn);
++ return last_pfn;
++}
++unsigned long __init e820_end_of_ram_pfn(void)
++{
++ return e820_end_pfn(MAX_ARCH_PFN, E820_RAM);
++}
++
++unsigned long __init e820_end_of_low_ram_pfn(void)
++{
++ return e820_end_pfn(1UL<<(32 - PAGE_SHIFT), E820_RAM);
++}
++/*
++ * Finds an active region in the address range from start_pfn to last_pfn and
++ * returns its range in ei_startpfn and ei_endpfn for the e820 entry.
++ */
++int __init e820_find_active_region(const struct e820entry *ei,
++ unsigned long start_pfn,
++ unsigned long last_pfn,
++ unsigned long *ei_startpfn,
++ unsigned long *ei_endpfn)
++{
++ u64 align = PAGE_SIZE;
++
++ *ei_startpfn = round_up(ei->addr, align) >> PAGE_SHIFT;
++ *ei_endpfn = round_down(ei->addr + ei->size, align) >> PAGE_SHIFT;
++
++ /* Skip map entries smaller than a page */
++ if (*ei_startpfn >= *ei_endpfn)
++ return 0;
++
++ /* Skip if map is outside the node */
++ if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
++ *ei_startpfn >= last_pfn)
++ return 0;
++
++ /* Check for overlaps */
++ if (*ei_startpfn < start_pfn)
++ *ei_startpfn = start_pfn;
++ if (*ei_endpfn > last_pfn)
++ *ei_endpfn = last_pfn;
++
++ return 1;
++}
++
++/* Walk the e820 map and register active regions within a node */
++void __init e820_register_active_regions(int nid, unsigned long start_pfn,
++ unsigned long last_pfn)
++{
++ unsigned long ei_startpfn;
++ unsigned long ei_endpfn;
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++)
++ if (e820_find_active_region(&e820.map[i],
++ start_pfn, last_pfn,
++ &ei_startpfn, &ei_endpfn))
++ add_active_range(nid, ei_startpfn, ei_endpfn);
++}
++
++/*
++ * Find the hole size (in bytes) in the memory range.
++ * @start: starting address of the memory range to scan
++ * @end: ending address of the memory range to scan
++ */
++u64 __init e820_hole_size(u64 start, u64 end)
++{
++ unsigned long start_pfn = start >> PAGE_SHIFT;
++ unsigned long last_pfn = end >> PAGE_SHIFT;
++ unsigned long ei_startpfn, ei_endpfn, ram = 0;
++ int i;
++
++ for (i = 0; i < e820.nr_map; i++) {
++ if (e820_find_active_region(&e820.map[i],
++ start_pfn, last_pfn,
++ &ei_startpfn, &ei_endpfn))
++ ram += ei_endpfn - ei_startpfn;
++ }
++ return end - start - ((u64)ram << PAGE_SHIFT);
++}
++
++static void early_panic(char *msg)
++{
++ early_printk(msg);
++ panic(msg);
++}
++
++static int userdef __initdata;
++
++/* "mem=nopentium" disables the 4MB page tables. */
++static int __init parse_memopt(char *p)
++{
++ u64 mem_size, current_end;
++ unsigned int i;
++
++ if (!p)
++ return -EINVAL;
++
++#ifdef CONFIG_X86_32
++ if (!strcmp(p, "nopentium")) {
++ setup_clear_cpu_cap(X86_FEATURE_PSE);
++ return 0;
++ }
++#endif
++
++ userdef = 1;
++ mem_size = memparse(p, &p);
++ e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
++
++ i = e820.nr_map - 1;
++ current_end = e820.map[i].addr + e820.map[i].size;
++ if (current_end < mem_size) {
++ /*
++ * The e820 map ends before our requested size so
++ * extend the final entry to the requested address.
++ */
++ if (e820.map[i].type == E820_RAM)
++ e820.map[i].size = mem_size - e820.map[i].addr;
++ else
++ e820_add_region(current_end, mem_size - current_end, E820_RAM);
++ }
++
++ return 0;
++}
++early_param("mem", parse_memopt);
++
++#ifndef CONFIG_XEN
++static int __init parse_memmap_opt(char *p)
++{
++ char *oldp;
++ u64 start_at, mem_size;
++
++ if (!p)
++ return -EINVAL;
++
++ if (!strncmp(p, "exactmap", 8)) {
++#ifdef CONFIG_CRASH_DUMP
++ /*
++ * If we are doing a crash dump, we still need to know
++ * the real mem size before original memory map is
++ * reset.
++ */
++ saved_max_pfn = e820_end_of_ram_pfn();
++#endif
++ e820.nr_map = 0;
++ userdef = 1;
++ return 0;
++ }
++
++ oldp = p;
++ mem_size = memparse(p, &p);
++ if (p == oldp)
++ return -EINVAL;
++
++ userdef = 1;
++ if (*p == '@') {
++ start_at = memparse(p+1, &p);
++ e820_add_region(start_at, mem_size, E820_RAM);
++ } else if (*p == '#') {
++ start_at = memparse(p+1, &p);
++ e820_add_region(start_at, mem_size, E820_ACPI);
++ } else if (*p == '$') {
++ start_at = memparse(p+1, &p);
++ e820_add_region(start_at, mem_size, E820_RESERVED);
++ } else
++ e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
++
++ return *p == '\0' ? 0 : -EINVAL;
++}
++early_param("memmap", parse_memmap_opt);
++
++void __init finish_e820_parsing(void)
++{
++ if (userdef) {
++ int nr = e820.nr_map;
++
++ if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &nr) < 0)
++ early_panic("Invalid user supplied memory map");
++ e820.nr_map = nr;
++
++ printk(KERN_INFO "user-defined physical RAM map:\n");
++ e820_print_map("user");
++ }
++}
++#endif
++
++static inline const char *e820_type_to_string(int e820_type)
++{
++ switch (e820_type) {
++ case E820_RESERVED_KERN:
++ case E820_RAM: return "System RAM";
++ case E820_ACPI: return "ACPI Tables";
++ case E820_NVS: return "ACPI Non-volatile Storage";
++ default: return "reserved";
++ }
++}
++
++#ifdef CONFIG_XEN
++#define e820 machine_e820
++#endif
++
++/*
++ * Mark e820 reserved areas as busy for the resource manager.
++ */
++void __init e820_reserve_resources(void)
++{
++ int i;
++ struct resource *res;
++ u64 end;
++
++ res = alloc_bootmem_low(sizeof(struct resource) * e820.nr_map);
++ for (i = 0; i < e820.nr_map; i++) {
++ end = e820.map[i].addr + e820.map[i].size - 1;
++#ifndef CONFIG_RESOURCES_64BIT
++ if (end > 0x100000000ULL) {
++ res++;
++ continue;
++ }
++#endif
++ res->name = e820_type_to_string(e820.map[i].type);
++ res->start = e820.map[i].addr;
++ res->end = end;
++
++ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
++ insert_resource(&iomem_resource, res);
++ res++;
++ }
++
++ for (i = 0; i < e820_saved.nr_map; i++) {
++ struct e820entry *entry = &e820_saved.map[i];
++ firmware_map_add_early(entry->addr,
++ entry->addr + entry->size - 1,
++ e820_type_to_string(entry->type));
++ }
++}
++
++#undef e820
++
++#ifndef CONFIG_XEN
++char *__init default_machine_specific_memory_setup(void)
++{
++ char *who = "BIOS-e820";
++ int new_nr;
++ /*
++ * Try to copy the BIOS-supplied E820-map.
++ *
++ * Otherwise fake a memory map; one section from 0k->640k,
++ * the next section from 1mb->appropriate_mem_k
++ */
++ new_nr = boot_params.e820_entries;
++ sanitize_e820_map(boot_params.e820_map,
++ ARRAY_SIZE(boot_params.e820_map),
++ &new_nr);
++ boot_params.e820_entries = new_nr;
++ if (append_e820_map(boot_params.e820_map, boot_params.e820_entries)
++ < 0) {
++ u64 mem_size;
++
++ /* compare results from other methods and take the greater */
++ if (boot_params.alt_mem_k
++ < boot_params.screen_info.ext_mem_k) {
++ mem_size = boot_params.screen_info.ext_mem_k;
++ who = "BIOS-88";
++ } else {
++ mem_size = boot_params.alt_mem_k;
++ who = "BIOS-e801";
++ }
++
++ e820.nr_map = 0;
++ e820_add_region(0, LOWMEMSIZE(), E820_RAM);
++ e820_add_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
++ }
++
++ /* In case someone cares... */
++ return who;
++}
++
++char *__init __attribute__((weak)) machine_specific_memory_setup(void)
++{
++ if (x86_quirks->arch_memory_setup) {
++ char *who = x86_quirks->arch_memory_setup();
++
++ if (who)
++ return who;
++ }
++ return default_machine_specific_memory_setup();
++}
++#endif
++
++char * __init memory_setup(void)
++{
++ int rc, nr_map;
++ struct xen_memory_map memmap;
++ /*
++ * This is rather large for a stack variable but this early in
++ * the boot process we know we have plenty slack space.
++ */
++ struct e820entry map[E820MAX];
++
++ memmap.nr_entries = E820MAX;
++ set_xen_guest_handle(memmap.buffer, map);
++
++ rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
++ if (rc == -ENOSYS) {
++ memmap.nr_entries = 1;
++ map[0].addr = 0ULL;
++ map[0].size = PFN_PHYS((unsigned long long)xen_start_info->nr_pages);
++ /* 8MB slack (to balance backend allocations). */
++ map[0].size += 8ULL << 20;
++ map[0].type = E820_RAM;
++ rc = 0;
++ }
++ BUG_ON(rc);
++
++ nr_map = memmap.nr_entries;
++ sanitize_e820_map(map, ARRAY_SIZE(map), &nr_map);
++
++ if (append_e820_map(map, nr_map) < 0)
++ BUG();
++
++#ifdef CONFIG_XEN
++ if (is_initial_xendomain()) {
++ memmap.nr_entries = E820MAX;
++ set_xen_guest_handle(memmap.buffer, machine_e820.map);
++
++ if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
++ BUG();
++ machine_e820.nr_map = memmap.nr_entries;
++ } else
++ machine_e820 = e820;
++#endif
++
++ return "Xen";
++}
++
++void __init setup_memory_map(void)
++{
++ char *who;
++
++ who = memory_setup();
++ memcpy(&e820_saved, &e820, sizeof(struct e820map));
++ printk(KERN_INFO "Xen-provided physical RAM map:\n");
++ e820_print_map(who);
++}
+Index: head-2008-12-01/arch/x86/kernel/e820_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/e820_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,873 +0,0 @@
+-#include <linux/kernel.h>
+-#include <linux/types.h>
+-#include <linux/init.h>
+-#include <linux/bootmem.h>
+-#include <linux/ioport.h>
+-#include <linux/string.h>
+-#include <linux/kexec.h>
+-#include <linux/module.h>
+-#include <linux/mm.h>
+-#include <linux/pfn.h>
+-#include <linux/uaccess.h>
+-#include <linux/suspend.h>
+-
+-#include <asm/pgtable.h>
+-#include <asm/page.h>
+-#include <asm/e820.h>
+-#include <asm/setup.h>
+-#include <xen/interface/memory.h>
+-
+-struct e820map e820;
+-struct change_member {
+- struct e820entry *pbios; /* pointer to original bios entry */
+- unsigned long long addr; /* address for this change point */
+-};
+-static struct change_member change_point_list[2*E820MAX] __initdata;
+-static struct change_member *change_point[2*E820MAX] __initdata;
+-static struct e820entry *overlap_list[E820MAX] __initdata;
+-static struct e820entry new_bios[E820MAX] __initdata;
+-/* For PCI or other memory-mapped resources */
+-unsigned long pci_mem_start = 0x10000000;
+-#ifdef CONFIG_PCI
+-EXPORT_SYMBOL(pci_mem_start);
+-#endif
+-extern int user_defined_memmap;
+-
+-static struct resource system_rom_resource = {
+- .name = "System ROM",
+- .start = 0xf0000,
+- .end = 0xfffff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-};
+-
+-static struct resource extension_rom_resource = {
+- .name = "Extension ROM",
+- .start = 0xe0000,
+- .end = 0xeffff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-};
+-
+-static struct resource adapter_rom_resources[] = { {
+- .name = "Adapter ROM",
+- .start = 0xc8000,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-}, {
+- .name = "Adapter ROM",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-} };
+-
+-static struct resource video_rom_resource = {
+- .name = "Video ROM",
+- .start = 0xc0000,
+- .end = 0xc7fff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+-};
+-
+-#define ROMSIGNATURE 0xaa55
+-
+-static int __init romsignature(const unsigned char *rom)
+-{
+- const unsigned short * const ptr = (const unsigned short *)rom;
+- unsigned short sig;
+-
+- return probe_kernel_address(ptr, sig) == 0 && sig == ROMSIGNATURE;
+-}
+-
+-static int __init romchecksum(const unsigned char *rom, unsigned long length)
+-{
+- unsigned char sum, c;
+-
+- for (sum = 0; length && probe_kernel_address(rom++, c) == 0; length--)
+- sum += c;
+- return !length && !sum;
+-}
+-
+-static void __init probe_roms(void)
+-{
+- const unsigned char *rom;
+- unsigned long start, length, upper;
+- unsigned char c;
+- int i;
+-
+-#ifdef CONFIG_XEN
+- /* Nothing to do if not running in dom0. */
+- if (!is_initial_xendomain())
+- return;
+-#endif
+-
+- /* video rom */
+- upper = adapter_rom_resources[0].start;
+- for (start = video_rom_resource.start; start < upper; start += 2048) {
+- rom = isa_bus_to_virt(start);
+- if (!romsignature(rom))
+- continue;
+-
+- video_rom_resource.start = start;
+-
+- if (probe_kernel_address(rom + 2, c) != 0)
+- continue;
+-
+- /* 0 < length <= 0x7f * 512, historically */
+- length = c * 512;
+-
+- /* if checksum okay, trust length byte */
+- if (length && romchecksum(rom, length))
+- video_rom_resource.end = start + length - 1;
+-
+- request_resource(&iomem_resource, &video_rom_resource);
+- break;
+- }
+-
+- start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
+- if (start < upper)
+- start = upper;
+-
+- /* system rom */
+- request_resource(&iomem_resource, &system_rom_resource);
+- upper = system_rom_resource.start;
+-
+- /* check for extension rom (ignore length byte!) */
+- rom = isa_bus_to_virt((unsigned long)extension_rom_resource.start);
+- if (romsignature(rom)) {
+- length = extension_rom_resource.end - extension_rom_resource.start + 1;
+- if (romchecksum(rom, length)) {
+- request_resource(&iomem_resource, &extension_rom_resource);
+- upper = extension_rom_resource.start;
+- }
+- }
+-
+- /* check for adapter roms on 2k boundaries */
+- for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
+- rom = isa_bus_to_virt(start);
+- if (!romsignature(rom))
+- continue;
+-
+- if (probe_kernel_address(rom + 2, c) != 0)
+- continue;
+-
+- /* 0 < length <= 0x7f * 512, historically */
+- length = c * 512;
+-
+- /* but accept any length that fits if checksum okay */
+- if (!length || start + length > upper || !romchecksum(rom, length))
+- continue;
+-
+- adapter_rom_resources[i].start = start;
+- adapter_rom_resources[i].end = start + length - 1;
+- request_resource(&iomem_resource, &adapter_rom_resources[i]);
+-
+- start = adapter_rom_resources[i++].end & ~2047UL;
+- }
+-}
+-
+-#ifdef CONFIG_XEN
+-static struct e820map machine_e820;
+-#define e820 machine_e820
+-#endif
+-
+-/*
+- * Request address space for all standard RAM and ROM resources
+- * and also for regions reported as reserved by the e820.
+- */
+-void __init init_iomem_resources(struct resource *code_resource,
+- struct resource *data_resource,
+- struct resource *bss_resource)
+-{
+- int i;
+-
+- probe_roms();
+- for (i = 0; i < e820.nr_map; i++) {
+- struct resource *res;
+-#ifndef CONFIG_RESOURCES_64BIT
+- if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL)
+- continue;
+-#endif
+- res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
+- switch (e820.map[i].type) {
+- case E820_RAM: res->name = "System RAM"; break;
+- case E820_ACPI: res->name = "ACPI Tables"; break;
+- case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
+- default: res->name = "reserved";
+- }
+- res->start = e820.map[i].addr;
+- res->end = res->start + e820.map[i].size - 1;
+- res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+- if (request_resource(&iomem_resource, res)) {
+- kfree(res);
+- continue;
+- }
+- if (e820.map[i].type == E820_RAM) {
+- /*
+- * We don't know which RAM region contains kernel data,
+- * so we try it repeatedly and let the resource manager
+- * test it.
+- */
+-#ifndef CONFIG_XEN
+- request_resource(res, code_resource);
+- request_resource(res, data_resource);
+- request_resource(res, bss_resource);
+-#endif
+-#ifdef CONFIG_KEXEC
+- if (crashk_res.start != crashk_res.end)
+- request_resource(res, &crashk_res);
+-#ifdef CONFIG_XEN
+- xen_machine_kexec_register_resources(res);
+-#endif
+-#endif
+- }
+- }
+-}
+-
+-#undef e820
+-
+-#if defined(CONFIG_PM) && defined(CONFIG_HIBERNATION)
+-/**
+- * e820_mark_nosave_regions - Find the ranges of physical addresses that do not
+- * correspond to e820 RAM areas and mark the corresponding pages as nosave for
+- * hibernation.
+- *
+- * This function requires the e820 map to be sorted and without any
+- * overlapping entries and assumes the first e820 area to be RAM.
+- */
+-void __init e820_mark_nosave_regions(void)
+-{
+- int i;
+- unsigned long pfn;
+-
+- pfn = PFN_DOWN(e820.map[0].addr + e820.map[0].size);
+- for (i = 1; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+-
+- if (pfn < PFN_UP(ei->addr))
+- register_nosave_region(pfn, PFN_UP(ei->addr));
+-
+- pfn = PFN_DOWN(ei->addr + ei->size);
+- if (ei->type != E820_RAM)
+- register_nosave_region(PFN_UP(ei->addr), pfn);
+-
+- if (pfn >= max_low_pfn)
+- break;
+- }
+-}
+-#endif
+-
+-void __init add_memory_region(unsigned long long start,
+- unsigned long long size, int type)
+-{
+- int x;
+-
+- x = e820.nr_map;
+-
+- if (x == E820MAX) {
+- printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
+- return;
+- }
+-
+- e820.map[x].addr = start;
+- e820.map[x].size = size;
+- e820.map[x].type = type;
+- e820.nr_map++;
+-} /* add_memory_region */
+-
+-/*
+- * Sanitize the BIOS e820 map.
+- *
+- * Some e820 responses include overlapping entries. The following
+- * replaces the original e820 map with a new one, removing overlaps.
+- *
+- */
+-int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
+-{
+- struct change_member *change_tmp;
+- unsigned long current_type, last_type;
+- unsigned long long last_addr;
+- int chgidx, still_changing;
+- int overlap_entries;
+- int new_bios_entry;
+- int old_nr, new_nr, chg_nr;
+- int i;
+-
+- /*
+- Visually we're performing the following (1,2,3,4 = memory types)...
+-
+- Sample memory map (w/overlaps):
+- ____22__________________
+- ______________________4_
+- ____1111________________
+- _44_____________________
+- 11111111________________
+- ____________________33__
+- ___________44___________
+- __________33333_________
+- ______________22________
+- ___________________2222_
+- _________111111111______
+- _____________________11_
+- _________________4______
+-
+- Sanitized equivalent (no overlap):
+- 1_______________________
+- _44_____________________
+- ___1____________________
+- ____22__________________
+- ______11________________
+- _________1______________
+- __________3_____________
+- ___________44___________
+- _____________33_________
+- _______________2________
+- ________________1_______
+- _________________4______
+- ___________________2____
+- ____________________33__
+- ______________________4_
+- */
+- /* if there's only one memory region, don't bother */
+- if (*pnr_map < 2) {
+- return -1;
+- }
+-
+- old_nr = *pnr_map;
+-
+- /* bail out if we find any unreasonable addresses in bios map */
+- for (i=0; i<old_nr; i++)
+- if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr) {
+- return -1;
+- }
+-
+- /* create pointers for initial change-point information (for sorting) */
+- for (i=0; i < 2*old_nr; i++)
+- change_point[i] = &change_point_list[i];
+-
+- /* record all known change-points (starting and ending addresses),
+- omitting those that are for empty memory regions */
+- chgidx = 0;
+- for (i=0; i < old_nr; i++) {
+- if (biosmap[i].size != 0) {
+- change_point[chgidx]->addr = biosmap[i].addr;
+- change_point[chgidx++]->pbios = &biosmap[i];
+- change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
+- change_point[chgidx++]->pbios = &biosmap[i];
+- }
+- }
+- chg_nr = chgidx; /* true number of change-points */
+-
+- /* sort change-point list by memory addresses (low -> high) */
+- still_changing = 1;
+- while (still_changing) {
+- still_changing = 0;
+- for (i=1; i < chg_nr; i++) {
+- /* if <current_addr> > <last_addr>, swap */
+- /* or, if current=<start_addr> & last=<end_addr>, swap */
+- if ((change_point[i]->addr < change_point[i-1]->addr) ||
+- ((change_point[i]->addr == change_point[i-1]->addr) &&
+- (change_point[i]->addr == change_point[i]->pbios->addr) &&
+- (change_point[i-1]->addr != change_point[i-1]->pbios->addr))
+- )
+- {
+- change_tmp = change_point[i];
+- change_point[i] = change_point[i-1];
+- change_point[i-1] = change_tmp;
+- still_changing=1;
+- }
+- }
+- }
+-
+- /* create a new bios memory map, removing overlaps */
+- overlap_entries=0; /* number of entries in the overlap table */
+- new_bios_entry=0; /* index for creating new bios map entries */
+- last_type = 0; /* start with undefined memory type */
+- last_addr = 0; /* start with 0 as last starting address */
+- /* loop through change-points, determining affect on the new bios map */
+- for (chgidx=0; chgidx < chg_nr; chgidx++)
+- {
+- /* keep track of all overlapping bios entries */
+- if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
+- {
+- /* add map entry to overlap list (> 1 entry implies an overlap) */
+- overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
+- }
+- else
+- {
+- /* remove entry from list (order independent, so swap with last) */
+- for (i=0; i<overlap_entries; i++)
+- {
+- if (overlap_list[i] == change_point[chgidx]->pbios)
+- overlap_list[i] = overlap_list[overlap_entries-1];
+- }
+- overlap_entries--;
+- }
+- /* if there are overlapping entries, decide which "type" to use */
+- /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
+- current_type = 0;
+- for (i=0; i<overlap_entries; i++)
+- if (overlap_list[i]->type > current_type)
+- current_type = overlap_list[i]->type;
+- /* continue building up new bios map based on this information */
+- if (current_type != last_type) {
+- if (last_type != 0) {
+- new_bios[new_bios_entry].size =
+- change_point[chgidx]->addr - last_addr;
+- /* move forward only if the new size was non-zero */
+- if (new_bios[new_bios_entry].size != 0)
+- if (++new_bios_entry >= E820MAX)
+- break; /* no more space left for new bios entries */
+- }
+- if (current_type != 0) {
+- new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
+- new_bios[new_bios_entry].type = current_type;
+- last_addr=change_point[chgidx]->addr;
+- }
+- last_type = current_type;
+- }
+- }
+- new_nr = new_bios_entry; /* retain count for new bios entries */
+-
+- /* copy new bios mapping into original location */
+- memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
+- *pnr_map = new_nr;
+-
+- return 0;
+-}
+-
+-/*
+- * Copy the BIOS e820 map into a safe place.
+- *
+- * Sanity-check it while we're at it..
+- *
+- * If we're lucky and live on a modern system, the setup code
+- * will have given us a memory map that we can use to properly
+- * set up memory. If we aren't, we'll fake a memory map.
+- *
+- * We check to see that the memory map contains at least 2 elements
+- * before we'll use it, because the detection code in setup.S may
+- * not be perfect and most every PC known to man has two memory
+- * regions: one from 0 to 640k, and one from 1mb up. (The IBM
+- * thinkpad 560x, for example, does not cooperate with the memory
+- * detection code.)
+- */
+-int __init copy_e820_map(struct e820entry *biosmap, int nr_map)
+-{
+-#ifndef CONFIG_XEN
+- /* Only one memory region (or negative)? Ignore it */
+- if (nr_map < 2)
+- return -1;
+-#else
+- BUG_ON(nr_map < 1);
+-#endif
+-
+- do {
+- u64 start = biosmap->addr;
+- u64 size = biosmap->size;
+- u64 end = start + size;
+- u32 type = biosmap->type;
+-
+- /* Overflow in 64 bits? Ignore the memory map. */
+- if (start > end)
+- return -1;
+-
+- add_memory_region(start, size, type);
+- } while (biosmap++, --nr_map);
+-
+-#ifdef CONFIG_XEN
+- if (is_initial_xendomain()) {
+- struct xen_memory_map memmap;
+-
+- memmap.nr_entries = E820MAX;
+- set_xen_guest_handle(memmap.buffer, machine_e820.map);
+-
+- if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
+- BUG();
+- machine_e820.nr_map = memmap.nr_entries;
+- } else
+- machine_e820 = e820;
+-#endif
+-
+- return 0;
+-}
+-
+-/*
+- * Find the highest page frame number we have available
+- */
+-void __init propagate_e820_map(void)
+-{
+- int i;
+-
+- max_pfn = 0;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- unsigned long start, end;
+- /* RAM? */
+- if (e820.map[i].type != E820_RAM)
+- continue;
+- start = PFN_UP(e820.map[i].addr);
+- end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
+- if (start >= end)
+- continue;
+- if (end > max_pfn)
+- max_pfn = end;
+- memory_present(0, start, end);
+- }
+-}
+-
+-/*
+- * Register fully available low RAM pages with the bootmem allocator.
+- */
+-void __init register_bootmem_low_pages(unsigned long max_low_pfn)
+-{
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- unsigned long curr_pfn, last_pfn, size;
+- /*
+- * Reserve usable low memory
+- */
+- if (e820.map[i].type != E820_RAM)
+- continue;
+- /*
+- * We are rounding up the start address of usable memory:
+- */
+- curr_pfn = PFN_UP(e820.map[i].addr);
+- if (curr_pfn >= max_low_pfn)
+- continue;
+- /*
+- * ... and at the end of the usable range downwards:
+- */
+- last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
+-
+-#ifdef CONFIG_XEN
+- /*
+- * Truncate to the number of actual pages currently
+- * present.
+- */
+- if (last_pfn > xen_start_info->nr_pages)
+- last_pfn = xen_start_info->nr_pages;
+-#endif
+-
+- if (last_pfn > max_low_pfn)
+- last_pfn = max_low_pfn;
+-
+- /*
+- * .. finally, did all the rounding and playing
+- * around just make the area go away?
+- */
+- if (last_pfn <= curr_pfn)
+- continue;
+-
+- size = last_pfn - curr_pfn;
+- free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
+- }
+-}
+-
+-void __init e820_register_memory(void)
+-{
+- unsigned long gapstart, gapsize, round;
+- unsigned long long last;
+- int i;
+-
+-#ifdef CONFIG_XEN
+- if (is_initial_xendomain()) {
+- struct xen_memory_map memmap;
+-
+- memmap.nr_entries = E820MAX;
+- set_xen_guest_handle(memmap.buffer, machine_e820.map);
+-
+- if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
+- BUG();
+- machine_e820.nr_map = memmap.nr_entries;
+- }
+- else
+- machine_e820 = e820;
+-#define e820 machine_e820
+-#endif
+-
+- /*
+- * Search for the biggest gap in the low 32 bits of the e820
+- * memory space.
+- */
+- last = 0x100000000ull;
+- gapstart = 0x10000000;
+- gapsize = 0x400000;
+- i = e820.nr_map;
+- while (--i >= 0) {
+- unsigned long long start = e820.map[i].addr;
+- unsigned long long end = start + e820.map[i].size;
+-
+- /*
+- * Since "last" is at most 4GB, we know we'll
+- * fit in 32 bits if this condition is true
+- */
+- if (last > end) {
+- unsigned long gap = last - end;
+-
+- if (gap > gapsize) {
+- gapsize = gap;
+- gapstart = end;
+- }
+- }
+- if (start < last)
+- last = start;
+- }
+-#undef e820
+-
+- /*
+- * See how much we want to round up: start off with
+- * rounding to the next 1MB area.
+- */
+- round = 0x100000;
+- while ((gapsize >> 4) > round)
+- round += round;
+- /* Fun with two's complement */
+- pci_mem_start = (gapstart + round) & -round;
+-
+- printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
+- pci_mem_start, gapstart, gapsize);
+-}
+-
+-void __init print_memory_map(char *who)
+-{
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- printk(" %s: %016Lx - %016Lx ", who,
+- e820.map[i].addr,
+- e820.map[i].addr + e820.map[i].size);
+- switch (e820.map[i].type) {
+- case E820_RAM: printk("(usable)\n");
+- break;
+- case E820_RESERVED:
+- printk("(reserved)\n");
+- break;
+- case E820_ACPI:
+- printk("(ACPI data)\n");
+- break;
+- case E820_NVS:
+- printk("(ACPI NVS)\n");
+- break;
+- default: printk("type %u\n", e820.map[i].type);
+- break;
+- }
+- }
+-}
+-
+-void __init limit_regions(unsigned long long size)
+-{
+- unsigned long long current_addr = 0;
+- int i;
+-
+- print_memory_map("limit_regions start");
+- for (i = 0; i < e820.nr_map; i++) {
+- current_addr = e820.map[i].addr + e820.map[i].size;
+- if (current_addr < size)
+- continue;
+-
+- if (e820.map[i].type != E820_RAM)
+- continue;
+-
+- if (e820.map[i].addr >= size) {
+- /*
+- * This region starts past the end of the
+- * requested size, skip it completely.
+- */
+- e820.nr_map = i;
+- } else {
+- e820.nr_map = i + 1;
+- e820.map[i].size -= current_addr - size;
+- }
+- print_memory_map("limit_regions endfor");
+- return;
+- }
+-#ifdef CONFIG_XEN
+- if (current_addr < size) {
+- /*
+- * The e820 map finished before our requested size so
+- * extend the final entry to the requested address.
+- */
+- --i;
+- if (e820.map[i].type == E820_RAM)
+- e820.map[i].size -= current_addr - size;
+- else
+- add_memory_region(current_addr, size - current_addr, E820_RAM);
+- }
+-#endif
+- print_memory_map("limit_regions endfunc");
+-}
+-
+-/*
+- * This function checks if any part of the range <start,end> is mapped
+- * with type.
+- */
+-int
+-e820_any_mapped(u64 start, u64 end, unsigned type)
+-{
+- int i;
+-
+-#ifndef CONFIG_XEN
+- for (i = 0; i < e820.nr_map; i++) {
+- const struct e820entry *ei = &e820.map[i];
+-#else
+- if (!is_initial_xendomain())
+- return 0;
+- for (i = 0; i < machine_e820.nr_map; ++i) {
+- const struct e820entry *ei = &machine_e820.map[i];
+-#endif
+-
+- if (type && ei->type != type)
+- continue;
+- if (ei->addr >= end || ei->addr + ei->size <= start)
+- continue;
+- return 1;
+- }
+- return 0;
+-}
+-EXPORT_SYMBOL_GPL(e820_any_mapped);
+-
+- /*
+- * This function checks if the entire range <start,end> is mapped with type.
+- *
+- * Note: this function only works correct if the e820 table is sorted and
+- * not-overlapping, which is the case
+- */
+-int __init
+-e820_all_mapped(unsigned long s, unsigned long e, unsigned type)
+-{
+- u64 start = s;
+- u64 end = e;
+- int i;
+-
+-#ifndef CONFIG_XEN
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+-#else
+- if (!is_initial_xendomain())
+- return 0;
+- for (i = 0; i < machine_e820.nr_map; ++i) {
+- const struct e820entry *ei = &machine_e820.map[i];
+-#endif
+-
+- if (type && ei->type != type)
+- continue;
+- /* is the region (part) in overlap with the current region ?*/
+- if (ei->addr >= end || ei->addr + ei->size <= start)
+- continue;
+- /* if the region is at the beginning of <start,end> we move
+- * start to the end of the region since it's ok until there
+- */
+- if (ei->addr <= start)
+- start = ei->addr + ei->size;
+- /* if start is now at or beyond end, we're done, full
+- * coverage */
+- if (start >= end)
+- return 1; /* we're done */
+- }
+- return 0;
+-}
+-
+-static int __init parse_memmap(char *arg)
+-{
+- if (!arg)
+- return -EINVAL;
+-
+- if (strcmp(arg, "exactmap") == 0) {
+-#ifdef CONFIG_CRASH_DUMP
+- /* If we are doing a crash dump, we
+- * still need to know the real mem
+- * size before original memory map is
+- * reset.
+- */
+- propagate_e820_map();
+- saved_max_pfn = max_pfn;
+-#endif
+- e820.nr_map = 0;
+- user_defined_memmap = 1;
+- } else {
+- /* If the user specifies memory size, we
+- * limit the BIOS-provided memory map to
+- * that size. exactmap can be used to specify
+- * the exact map. mem=number can be used to
+- * trim the existing memory map.
+- */
+- unsigned long long start_at, mem_size;
+-
+- mem_size = memparse(arg, &arg);
+- if (*arg == '@') {
+- start_at = memparse(arg+1, &arg);
+- add_memory_region(start_at, mem_size, E820_RAM);
+- } else if (*arg == '#') {
+- start_at = memparse(arg+1, &arg);
+- add_memory_region(start_at, mem_size, E820_ACPI);
+- } else if (*arg == '$') {
+- start_at = memparse(arg+1, &arg);
+- add_memory_region(start_at, mem_size, E820_RESERVED);
+- } else {
+- limit_regions(mem_size);
+- user_defined_memmap = 1;
+- }
+- }
+- return 0;
+-}
+-early_param("memmap", parse_memmap);
+-
+-#ifndef CONFIG_XEN
+-void __init update_memory_range(u64 start, u64 size, unsigned old_type,
+- unsigned new_type)
+-{
+- int i;
+-
+- BUG_ON(old_type == new_type);
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- u64 final_start, final_end;
+- if (ei->type != old_type)
+- continue;
+- /* totally covered? */
+- if (ei->addr >= start && ei->size <= size) {
+- ei->type = new_type;
+- continue;
+- }
+- /* partially covered */
+- final_start = max(start, ei->addr);
+- final_end = min(start + size, ei->addr + ei->size);
+- if (final_start >= final_end)
+- continue;
+- add_memory_region(final_start, final_end - final_start,
+- new_type);
+- }
+-}
+-
+-void __init update_e820(void)
+-{
+- u8 nr_map;
+-
+- nr_map = e820.nr_map;
+- if (sanitize_e820_map(e820.map, &nr_map))
+- return;
+- e820.nr_map = nr_map;
+- printk(KERN_INFO "modified physical RAM map:\n");
+- print_memory_map("modified");
+-}
+-#endif
+Index: head-2008-12-01/arch/x86/kernel/e820_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/e820_64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,1045 +0,0 @@
+-/*
+- * Handle the memory map.
+- * The functions here do the job until bootmem takes over.
+- *
+- * Getting sanitize_e820_map() in sync with i386 version by applying change:
+- * - Provisions for empty E820 memory regions (reported by certain BIOSes).
+- * Alex Achenbach <xela@slit.de>, December 2002.
+- * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
+- *
+- */
+-#include <linux/kernel.h>
+-#include <linux/types.h>
+-#include <linux/init.h>
+-#include <linux/bootmem.h>
+-#include <linux/ioport.h>
+-#include <linux/string.h>
+-#include <linux/kexec.h>
+-#include <linux/module.h>
+-#include <linux/mm.h>
+-#include <linux/suspend.h>
+-#include <linux/pfn.h>
+-
+-#include <asm/pgtable.h>
+-#include <asm/page.h>
+-#include <asm/e820.h>
+-#include <asm/proto.h>
+-#include <asm/setup.h>
+-#include <asm/sections.h>
+-#include <asm/kdebug.h>
+-#include <xen/interface/memory.h>
+-
+-struct e820map e820 __initdata;
+-#ifdef CONFIG_XEN
+-struct e820map machine_e820;
+-#endif
+-
+-/*
+- * PFN of last memory page.
+- */
+-unsigned long end_pfn;
+-
+-/*
+- * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
+- * The direct mapping extends to max_pfn_mapped, so that we can directly access
+- * apertures, ACPI and other tables without having to play with fixmaps.
+- */
+-unsigned long max_pfn_mapped;
+-
+-/*
+- * Last pfn which the user wants to use.
+- */
+-static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
+-
+-/*
+- * Early reserved memory areas.
+- */
+-#define MAX_EARLY_RES 20
+-
+-struct early_res {
+- unsigned long start, end;
+- char name[16];
+-};
+-static struct early_res early_res[MAX_EARLY_RES] __initdata = {
+-#ifndef CONFIG_XEN
+- { 0, PAGE_SIZE, "BIOS data page" }, /* BIOS data page */
+-#ifdef CONFIG_X86_TRAMPOLINE
+- { TRAMPOLINE_BASE, TRAMPOLINE_BASE + 2 * PAGE_SIZE, "TRAMPOLINE" },
+-#endif
+-#endif
+- {}
+-};
+-
+-void __init reserve_early(unsigned long start, unsigned long end, char *name)
+-{
+- int i;
+- struct early_res *r;
+- for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+- r = &early_res[i];
+- if (end > r->start && start < r->end)
+- panic("Overlapping early reservations %lx-%lx %s to %lx-%lx %s\n",
+- start, end - 1, name?name:"", r->start, r->end - 1, r->name);
+- }
+- if (i >= MAX_EARLY_RES)
+- panic("Too many early reservations");
+- r = &early_res[i];
+- r->start = start;
+- r->end = end;
+- if (name)
+- strncpy(r->name, name, sizeof(r->name) - 1);
+-}
+-
+-void __init free_early(unsigned long start, unsigned long end)
+-{
+- struct early_res *r;
+- int i, j;
+-
+- for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+- r = &early_res[i];
+- if (start == r->start && end == r->end)
+- break;
+- }
+- if (i >= MAX_EARLY_RES || !early_res[i].end)
+- panic("free_early on not reserved area: %lx-%lx!", start, end);
+-
+- for (j = i + 1; j < MAX_EARLY_RES && early_res[j].end; j++)
+- ;
+-
+- memmove(&early_res[i], &early_res[i + 1],
+- (j - 1 - i) * sizeof(struct early_res));
+-
+- early_res[j - 1].end = 0;
+-}
+-
+-void __init early_res_to_bootmem(unsigned long start, unsigned long end)
+-{
+- int i;
+- unsigned long final_start, final_end;
+- for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+- struct early_res *r = &early_res[i];
+- final_start = max(start, r->start);
+- final_end = min(end, r->end);
+- if (final_start >= final_end)
+- continue;
+- printk(KERN_INFO " early res: %d [%lx-%lx] %s\n", i,
+- final_start, final_end - 1, r->name);
+- reserve_bootmem_generic(final_start, final_end - final_start);
+- }
+-}
+-
+-/* Check for already reserved areas */
+-static inline int __init
+-bad_addr(unsigned long *addrp, unsigned long size, unsigned long align)
+-{
+- int i;
+- unsigned long addr = *addrp, last;
+- int changed = 0;
+-again:
+- last = addr + size;
+- for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+- struct early_res *r = &early_res[i];
+- if (last >= r->start && addr < r->end) {
+- *addrp = addr = round_up(r->end, align);
+- changed = 1;
+- goto again;
+- }
+- }
+- return changed;
+-}
+-
+-/* Check for already reserved areas */
+-static inline int __init
+-bad_addr_size(unsigned long *addrp, unsigned long *sizep, unsigned long align)
+-{
+- int i;
+- unsigned long addr = *addrp, last;
+- unsigned long size = *sizep;
+- int changed = 0;
+-again:
+- last = addr + size;
+- for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+- struct early_res *r = &early_res[i];
+- if (last > r->start && addr < r->start) {
+- size = r->start - addr;
+- changed = 1;
+- goto again;
+- }
+- if (last > r->end && addr < r->end) {
+- addr = round_up(r->end, align);
+- size = last - addr;
+- changed = 1;
+- goto again;
+- }
+- if (last <= r->end && addr >= r->start) {
+- (*sizep)++;
+- return 0;
+- }
+- }
+- if (changed) {
+- *addrp = addr;
+- *sizep = size;
+- }
+- return changed;
+-}
+-/*
+- * This function checks if any part of the range <start,end> is mapped
+- * with type.
+- */
+-int
+-e820_any_mapped(unsigned long start, unsigned long end, unsigned type)
+-{
+- int i;
+-
+-#ifndef CONFIG_XEN
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+-#else
+- if (!is_initial_xendomain())
+- return 0;
+- for (i = 0; i < machine_e820.nr_map; i++) {
+- const struct e820entry *ei = &machine_e820.map[i];
+-#endif
+-
+- if (type && ei->type != type)
+- continue;
+- if (ei->addr >= end || ei->addr + ei->size <= start)
+- continue;
+- return 1;
+- }
+- return 0;
+-}
+-EXPORT_SYMBOL_GPL(e820_any_mapped);
+-
+-/*
+- * This function checks if the entire range <start,end> is mapped with type.
+- *
+- * Note: this function only works correct if the e820 table is sorted and
+- * not-overlapping, which is the case
+- */
+-int __init e820_all_mapped(unsigned long start, unsigned long end,
+- unsigned type)
+-{
+- int i;
+-
+-#ifndef CONFIG_XEN
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+-#else
+- if (!is_initial_xendomain())
+- return 0;
+- for (i = 0; i < machine_e820.nr_map; i++) {
+- const struct e820entry *ei = &machine_e820.map[i];
+-#endif
+-
+- if (type && ei->type != type)
+- continue;
+- /* is the region (part) in overlap with the current region ?*/
+- if (ei->addr >= end || ei->addr + ei->size <= start)
+- continue;
+-
+- /* if the region is at the beginning of <start,end> we move
+- * start to the end of the region since it's ok until there
+- */
+- if (ei->addr <= start)
+- start = ei->addr + ei->size;
+- /*
+- * if start is now at or beyond end, we're done, full
+- * coverage
+- */
+- if (start >= end)
+- return 1;
+- }
+- return 0;
+-}
+-
+-/*
+- * Find a free area with specified alignment in a specific range.
+- */
+-unsigned long __init find_e820_area(unsigned long start, unsigned long end,
+- unsigned long size, unsigned long align)
+-{
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- unsigned long addr, last;
+- unsigned long ei_last;
+-
+- if (ei->type != E820_RAM)
+- continue;
+- addr = round_up(ei->addr, align);
+- ei_last = ei->addr + ei->size;
+- if (addr < start)
+- addr = round_up(start, align);
+- if (addr >= ei_last)
+- continue;
+- while (bad_addr(&addr, size, align) && addr+size <= ei_last)
+- ;
+- last = addr + size;
+- if (last > ei_last)
+- continue;
+- if (last > end)
+- continue;
+- return addr;
+- }
+- return -1UL;
+-}
+-
+-/*
+- * Find next free range after *start
+- */
+-unsigned long __init find_e820_area_size(unsigned long start,
+- unsigned long *sizep,
+- unsigned long align)
+-{
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- unsigned long addr, last;
+- unsigned long ei_last;
+-
+- if (ei->type != E820_RAM)
+- continue;
+- addr = round_up(ei->addr, align);
+- ei_last = ei->addr + ei->size;
+- if (addr < start)
+- addr = round_up(start, align);
+- if (addr >= ei_last)
+- continue;
+- *sizep = ei_last - addr;
+- while (bad_addr_size(&addr, sizep, align) &&
+- addr + *sizep <= ei_last)
+- ;
+- last = addr + *sizep;
+- if (last > ei_last)
+- continue;
+- return addr;
+- }
+- return -1UL;
+-
+-}
+-/*
+- * Find the highest page frame number we have available
+- */
+-unsigned long __init e820_end_of_ram(void)
+-{
+- unsigned long end_pfn;
+-
+- end_pfn = find_max_pfn_with_active_regions();
+-
+- if (end_pfn > max_pfn_mapped)
+- max_pfn_mapped = end_pfn;
+- if (max_pfn_mapped > MAXMEM>>PAGE_SHIFT)
+- max_pfn_mapped = MAXMEM>>PAGE_SHIFT;
+- if (end_pfn > end_user_pfn)
+- end_pfn = end_user_pfn;
+- if (end_pfn > max_pfn_mapped)
+- end_pfn = max_pfn_mapped;
+-
+- printk(KERN_INFO "max_pfn_mapped = %lu\n", max_pfn_mapped);
+- return end_pfn;
+-}
+-
+-/*
+- * Mark e820 reserved areas as busy for the resource manager.
+- */
+-void __init e820_reserve_resources(struct e820entry *e820, int nr_map)
+-{
+- int i;
+- struct resource *res;
+-
+- res = alloc_bootmem_low(sizeof(struct resource) * nr_map);
+- for (i = 0; i < nr_map; i++) {
+- switch (e820[i].type) {
+- case E820_RAM: res->name = "System RAM"; break;
+- case E820_ACPI: res->name = "ACPI Tables"; break;
+- case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
+- default: res->name = "reserved";
+- }
+- res->start = e820[i].addr;
+- res->end = res->start + e820[i].size - 1;
+- res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+- insert_resource(&iomem_resource, res);
+- res++;
+- }
+-}
+-
+-#ifndef CONFIG_XEN
+-/*
+- * Find the ranges of physical addresses that do not correspond to
+- * e820 RAM areas and mark the corresponding pages as nosave for software
+- * suspend and suspend to RAM.
+- *
+- * This function requires the e820 map to be sorted and without any
+- * overlapping entries and assumes the first e820 area to be RAM.
+- */
+-void __init e820_mark_nosave_regions(void)
+-{
+- int i;
+- unsigned long paddr;
+-
+- paddr = round_down(e820.map[0].addr + e820.map[0].size, PAGE_SIZE);
+- for (i = 1; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+-
+- if (paddr < ei->addr)
+- register_nosave_region(PFN_DOWN(paddr),
+- PFN_UP(ei->addr));
+-
+- paddr = round_down(ei->addr + ei->size, PAGE_SIZE);
+- if (ei->type != E820_RAM)
+- register_nosave_region(PFN_UP(ei->addr),
+- PFN_DOWN(paddr));
+-
+- if (paddr >= (end_pfn << PAGE_SHIFT))
+- break;
+- }
+-}
+-#endif
+-
+-/*
+- * Finds an active region in the address range from start_pfn to end_pfn and
+- * returns its range in ei_startpfn and ei_endpfn for the e820 entry.
+- */
+-static int __init e820_find_active_region(const struct e820entry *ei,
+- unsigned long start_pfn,
+- unsigned long end_pfn,
+- unsigned long *ei_startpfn,
+- unsigned long *ei_endpfn)
+-{
+- *ei_startpfn = round_up(ei->addr, PAGE_SIZE) >> PAGE_SHIFT;
+- *ei_endpfn = round_down(ei->addr + ei->size, PAGE_SIZE) >> PAGE_SHIFT;
+-
+- /* Skip map entries smaller than a page */
+- if (*ei_startpfn >= *ei_endpfn)
+- return 0;
+-
+- /* Check if max_pfn_mapped should be updated */
+- if (ei->type != E820_RAM && *ei_endpfn > max_pfn_mapped)
+- max_pfn_mapped = *ei_endpfn;
+-
+- /* Skip if map is outside the node */
+- if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
+- *ei_startpfn >= end_pfn)
+- return 0;
+-
+- /* Check for overlaps */
+- if (*ei_startpfn < start_pfn)
+- *ei_startpfn = start_pfn;
+- if (*ei_endpfn > end_pfn)
+- *ei_endpfn = end_pfn;
+-
+- /* Obey end_user_pfn to save on memmap */
+- if (*ei_startpfn >= end_user_pfn)
+- return 0;
+- if (*ei_endpfn > end_user_pfn)
+- *ei_endpfn = end_user_pfn;
+-
+- return 1;
+-}
+-
+-/* Walk the e820 map and register active regions within a node */
+-void __init
+-e820_register_active_regions(int nid, unsigned long start_pfn,
+- unsigned long end_pfn)
+-{
+- unsigned long ei_startpfn;
+- unsigned long ei_endpfn;
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++)
+- if (e820_find_active_region(&e820.map[i],
+- start_pfn, end_pfn,
+- &ei_startpfn, &ei_endpfn))
+- add_active_range(nid, ei_startpfn, ei_endpfn);
+-}
+-
+-/*
+- * Add a memory region to the kernel e820 map.
+- */
+-void __init add_memory_region(unsigned long start, unsigned long size, int type)
+-{
+- int x = e820.nr_map;
+-
+- if (x == E820MAX) {
+- printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
+- return;
+- }
+-
+- e820.map[x].addr = start;
+- e820.map[x].size = size;
+- e820.map[x].type = type;
+- e820.nr_map++;
+-}
+-
+-/*
+- * Find the hole size (in bytes) in the memory range.
+- * @start: starting address of the memory range to scan
+- * @end: ending address of the memory range to scan
+- */
+-unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
+-{
+- unsigned long start_pfn = start >> PAGE_SHIFT;
+- unsigned long end_pfn = end >> PAGE_SHIFT;
+- unsigned long ei_startpfn, ei_endpfn, ram = 0;
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- if (e820_find_active_region(&e820.map[i],
+- start_pfn, end_pfn,
+- &ei_startpfn, &ei_endpfn))
+- ram += ei_endpfn - ei_startpfn;
+- }
+- return end - start - (ram << PAGE_SHIFT);
+-}
+-
+-static void __init e820_print_map(char *who)
+-{
+- int i;
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- printk(KERN_INFO " %s: %016Lx - %016Lx ", who,
+- (unsigned long long) e820.map[i].addr,
+- (unsigned long long)
+- (e820.map[i].addr + e820.map[i].size));
+- switch (e820.map[i].type) {
+- case E820_RAM:
+- printk(KERN_CONT "(usable)\n");
+- break;
+- case E820_RESERVED:
+- printk(KERN_CONT "(reserved)\n");
+- break;
+- case E820_ACPI:
+- printk(KERN_CONT "(ACPI data)\n");
+- break;
+- case E820_NVS:
+- printk(KERN_CONT "(ACPI NVS)\n");
+- break;
+- default:
+- printk(KERN_CONT "type %u\n", e820.map[i].type);
+- break;
+- }
+- }
+-}
+-
+-/*
+- * Sanitize the BIOS e820 map.
+- *
+- * Some e820 responses include overlapping entries. The following
+- * replaces the original e820 map with a new one, removing overlaps.
+- *
+- */
+-static int __init sanitize_e820_map(struct e820entry *biosmap, char *pnr_map)
+-{
+- struct change_member {
+- struct e820entry *pbios; /* pointer to original bios entry */
+- unsigned long long addr; /* address for this change point */
+- };
+- static struct change_member change_point_list[2*E820MAX] __initdata;
+- static struct change_member *change_point[2*E820MAX] __initdata;
+- static struct e820entry *overlap_list[E820MAX] __initdata;
+- static struct e820entry new_bios[E820MAX] __initdata;
+- struct change_member *change_tmp;
+- unsigned long current_type, last_type;
+- unsigned long long last_addr;
+- int chgidx, still_changing;
+- int overlap_entries;
+- int new_bios_entry;
+- int old_nr, new_nr, chg_nr;
+- int i;
+-
+- /*
+- Visually we're performing the following
+- (1,2,3,4 = memory types)...
+-
+- Sample memory map (w/overlaps):
+- ____22__________________
+- ______________________4_
+- ____1111________________
+- _44_____________________
+- 11111111________________
+- ____________________33__
+- ___________44___________
+- __________33333_________
+- ______________22________
+- ___________________2222_
+- _________111111111______
+- _____________________11_
+- _________________4______
+-
+- Sanitized equivalent (no overlap):
+- 1_______________________
+- _44_____________________
+- ___1____________________
+- ____22__________________
+- ______11________________
+- _________1______________
+- __________3_____________
+- ___________44___________
+- _____________33_________
+- _______________2________
+- ________________1_______
+- _________________4______
+- ___________________2____
+- ____________________33__
+- ______________________4_
+- */
+-
+- /* if there's only one memory region, don't bother */
+- if (*pnr_map < 2)
+- return -1;
+-
+- old_nr = *pnr_map;
+-
+- /* bail out if we find any unreasonable addresses in bios map */
+- for (i = 0; i < old_nr; i++)
+- if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
+- return -1;
+-
+- /* create pointers for initial change-point information (for sorting) */
+- for (i = 0; i < 2 * old_nr; i++)
+- change_point[i] = &change_point_list[i];
+-
+- /* record all known change-points (starting and ending addresses),
+- omitting those that are for empty memory regions */
+- chgidx = 0;
+- for (i = 0; i < old_nr; i++) {
+- if (biosmap[i].size != 0) {
+- change_point[chgidx]->addr = biosmap[i].addr;
+- change_point[chgidx++]->pbios = &biosmap[i];
+- change_point[chgidx]->addr = biosmap[i].addr +
+- biosmap[i].size;
+- change_point[chgidx++]->pbios = &biosmap[i];
+- }
+- }
+- chg_nr = chgidx;
+-
+- /* sort change-point list by memory addresses (low -> high) */
+- still_changing = 1;
+- while (still_changing) {
+- still_changing = 0;
+- for (i = 1; i < chg_nr; i++) {
+- unsigned long long curaddr, lastaddr;
+- unsigned long long curpbaddr, lastpbaddr;
+-
+- curaddr = change_point[i]->addr;
+- lastaddr = change_point[i - 1]->addr;
+- curpbaddr = change_point[i]->pbios->addr;
+- lastpbaddr = change_point[i - 1]->pbios->addr;
+-
+- /*
+- * swap entries, when:
+- *
+- * curaddr > lastaddr or
+- * curaddr == lastaddr and curaddr == curpbaddr and
+- * lastaddr != lastpbaddr
+- */
+- if (curaddr < lastaddr ||
+- (curaddr == lastaddr && curaddr == curpbaddr &&
+- lastaddr != lastpbaddr)) {
+- change_tmp = change_point[i];
+- change_point[i] = change_point[i-1];
+- change_point[i-1] = change_tmp;
+- still_changing = 1;
+- }
+- }
+- }
+-
+- /* create a new bios memory map, removing overlaps */
+- overlap_entries = 0; /* number of entries in the overlap table */
+- new_bios_entry = 0; /* index for creating new bios map entries */
+- last_type = 0; /* start with undefined memory type */
+- last_addr = 0; /* start with 0 as last starting address */
+-
+- /* loop through change-points, determining affect on the new bios map */
+- for (chgidx = 0; chgidx < chg_nr; chgidx++) {
+- /* keep track of all overlapping bios entries */
+- if (change_point[chgidx]->addr ==
+- change_point[chgidx]->pbios->addr) {
+- /*
+- * add map entry to overlap list (> 1 entry
+- * implies an overlap)
+- */
+- overlap_list[overlap_entries++] =
+- change_point[chgidx]->pbios;
+- } else {
+- /*
+- * remove entry from list (order independent,
+- * so swap with last)
+- */
+- for (i = 0; i < overlap_entries; i++) {
+- if (overlap_list[i] ==
+- change_point[chgidx]->pbios)
+- overlap_list[i] =
+- overlap_list[overlap_entries-1];
+- }
+- overlap_entries--;
+- }
+- /*
+- * if there are overlapping entries, decide which
+- * "type" to use (larger value takes precedence --
+- * 1=usable, 2,3,4,4+=unusable)
+- */
+- current_type = 0;
+- for (i = 0; i < overlap_entries; i++)
+- if (overlap_list[i]->type > current_type)
+- current_type = overlap_list[i]->type;
+- /*
+- * continue building up new bios map based on this
+- * information
+- */
+- if (current_type != last_type) {
+- if (last_type != 0) {
+- new_bios[new_bios_entry].size =
+- change_point[chgidx]->addr - last_addr;
+- /*
+- * move forward only if the new size
+- * was non-zero
+- */
+- if (new_bios[new_bios_entry].size != 0)
+- /*
+- * no more space left for new
+- * bios entries ?
+- */
+- if (++new_bios_entry >= E820MAX)
+- break;
+- }
+- if (current_type != 0) {
+- new_bios[new_bios_entry].addr =
+- change_point[chgidx]->addr;
+- new_bios[new_bios_entry].type = current_type;
+- last_addr = change_point[chgidx]->addr;
+- }
+- last_type = current_type;
+- }
+- }
+- /* retain count for new bios entries */
+- new_nr = new_bios_entry;
+-
+- /* copy new bios mapping into original location */
+- memcpy(biosmap, new_bios, new_nr * sizeof(struct e820entry));
+- *pnr_map = new_nr;
+-
+- return 0;
+-}
+-
+-/*
+- * Copy the BIOS e820 map into a safe place.
+- *
+- * Sanity-check it while we're at it..
+- *
+- * If we're lucky and live on a modern system, the setup code
+- * will have given us a memory map that we can use to properly
+- * set up memory. If we aren't, we'll fake a memory map.
+- */
+-static int __init copy_e820_map(struct e820entry *biosmap, int nr_map)
+-{
+-#ifndef CONFIG_XEN
+- /* Only one memory region (or negative)? Ignore it */
+- if (nr_map < 2)
+- return -1;
+-#else
+- BUG_ON(nr_map < 1);
+-#endif
+-
+- do {
+- u64 start = biosmap->addr;
+- u64 size = biosmap->size;
+- u64 end = start + size;
+- u32 type = biosmap->type;
+-
+- /* Overflow in 64 bits? Ignore the memory map. */
+- if (start > end)
+- return -1;
+-
+- add_memory_region(start, size, type);
+- } while (biosmap++, --nr_map);
+-
+-#ifdef CONFIG_XEN
+- if (is_initial_xendomain()) {
+- struct xen_memory_map memmap;
+-
+- memmap.nr_entries = E820MAX;
+- set_xen_guest_handle(memmap.buffer, machine_e820.map);
+-
+- if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
+- BUG();
+- machine_e820.nr_map = memmap.nr_entries;
+- } else
+- machine_e820 = e820;
+-#endif
+-
+- return 0;
+-}
+-
+-static void early_panic(char *msg)
+-{
+- early_printk(msg);
+- panic(msg);
+-}
+-
+-/* We're not void only for x86 32-bit compat */
+-char * __init machine_specific_memory_setup(void)
+-{
+-#ifndef CONFIG_XEN
+- char *who = "BIOS-e820";
+- /*
+- * Try to copy the BIOS-supplied E820-map.
+- *
+- * Otherwise fake a memory map; one section from 0k->640k,
+- * the next section from 1mb->appropriate_mem_k
+- */
+- sanitize_e820_map(boot_params.e820_map, &boot_params.e820_entries);
+- if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries) < 0)
+- early_panic("Cannot find a valid memory map");
+-#else /* CONFIG_XEN */
+- char *who = "Xen";
+- int rc;
+- struct xen_memory_map memmap;
+- /*
+- * This is rather large for a stack variable but this early in
+- * the boot process we know we have plenty slack space.
+- */
+- struct e820entry map[E820MAX];
+-
+- memmap.nr_entries = E820MAX;
+- set_xen_guest_handle(memmap.buffer, map);
+-
+- rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
+- if ( rc == -ENOSYS ) {
+- memmap.nr_entries = 1;
+- map[0].addr = 0ULL;
+- map[0].size = xen_start_info->nr_pages << PAGE_SHIFT;
+- /* 8MB slack (to balance backend allocations). */
+- map[0].size += 8 << 20;
+- map[0].type = E820_RAM;
+- rc = 0;
+- }
+- BUG_ON(rc);
+-
+- sanitize_e820_map(map, (char *)&memmap.nr_entries);
+-
+- if (copy_e820_map(map, (char)memmap.nr_entries) < 0)
+- early_panic("Cannot find a valid memory map");
+-#endif
+- printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+- e820_print_map(who);
+-
+- /* In case someone cares... */
+- return who;
+-}
+-
+-static int __init parse_memopt(char *p)
+-{
+- int i;
+- unsigned long current_end;
+- unsigned long end;
+-
+- if (!p)
+- return -EINVAL;
+- end_user_pfn = memparse(p, &p);
+- end_user_pfn >>= PAGE_SHIFT;
+-
+- end = end_user_pfn<<PAGE_SHIFT;
+- i = e820.nr_map-1;
+- current_end = e820.map[i].addr + e820.map[i].size;
+-
+- if (current_end < end) {
+- /*
+- * The e820 map ends before our requested size so
+- * extend the final entry to the requested address.
+- */
+- if (e820.map[i].type == E820_RAM)
+- e820.map[i].size = end - e820.map[i].addr;
+- else
+- add_memory_region(current_end, end - current_end, E820_RAM);
+- }
+-
+- return 0;
+-}
+-early_param("mem", parse_memopt);
+-
+-static int userdef __initdata;
+-
+-static int __init parse_memmap_opt(char *p)
+-{
+- char *oldp;
+- unsigned long long start_at, mem_size;
+-
+- if (!strcmp(p, "exactmap")) {
+-#ifdef CONFIG_CRASH_DUMP
+- /*
+- * If we are doing a crash dump, we still need to know
+- * the real mem size before original memory map is
+- * reset.
+- */
+- e820_register_active_regions(0, 0, -1UL);
+- saved_max_pfn = e820_end_of_ram();
+- remove_all_active_ranges();
+-#endif
+- max_pfn_mapped = 0;
+- e820.nr_map = 0;
+- userdef = 1;
+- return 0;
+- }
+-
+- oldp = p;
+- mem_size = memparse(p, &p);
+- if (p == oldp)
+- return -EINVAL;
+-
+- userdef = 1;
+- if (*p == '@') {
+- start_at = memparse(p+1, &p);
+- add_memory_region(start_at, mem_size, E820_RAM);
+- } else if (*p == '#') {
+- start_at = memparse(p+1, &p);
+- add_memory_region(start_at, mem_size, E820_ACPI);
+- } else if (*p == '$') {
+- start_at = memparse(p+1, &p);
+- add_memory_region(start_at, mem_size, E820_RESERVED);
+- } else {
+- end_user_pfn = (mem_size >> PAGE_SHIFT);
+- }
+- return *p == '\0' ? 0 : -EINVAL;
+-}
+-early_param("memmap", parse_memmap_opt);
+-
+-void __init finish_e820_parsing(void)
+-{
+- if (userdef) {
+- char nr = e820.nr_map;
+-
+- if (sanitize_e820_map(e820.map, &nr) < 0)
+- early_panic("Invalid user supplied memory map");
+- e820.nr_map = nr;
+-
+- printk(KERN_INFO "user-defined physical RAM map:\n");
+- e820_print_map("user");
+- }
+-}
+-
+-#ifndef CONFIG_XEN
+-void __init update_memory_range(u64 start, u64 size, unsigned old_type,
+- unsigned new_type)
+-{
+- int i;
+-
+- BUG_ON(old_type == new_type);
+-
+- for (i = 0; i < e820.nr_map; i++) {
+- struct e820entry *ei = &e820.map[i];
+- u64 final_start, final_end;
+- if (ei->type != old_type)
+- continue;
+- /* totally covered? */
+- if (ei->addr >= start && ei->size <= size) {
+- ei->type = new_type;
+- continue;
+- }
+- /* partially covered */
+- final_start = max(start, ei->addr);
+- final_end = min(start + size, ei->addr + ei->size);
+- if (final_start >= final_end)
+- continue;
+- add_memory_region(final_start, final_end - final_start,
+- new_type);
+- }
+-}
+-
+-void __init update_e820(void)
+-{
+- u8 nr_map;
+-
+- nr_map = e820.nr_map;
+- if (sanitize_e820_map(e820.map, &nr_map))
+- return;
+- e820.nr_map = nr_map;
+- printk(KERN_INFO "modified physical RAM map:\n");
+- e820_print_map("modified");
+-}
+-#endif
+-
+-unsigned long pci_mem_start = 0xaeedbabe;
+-EXPORT_SYMBOL(pci_mem_start);
+-
+-/*
+- * Search for the biggest gap in the low 32 bits of the e820
+- * memory space. We pass this space to PCI to assign MMIO resources
+- * for hotplug or unconfigured devices in.
+- * Hopefully the BIOS let enough space left.
+- */
+-__init void e820_setup_gap(struct e820entry *e820, int nr_map)
+-{
+- unsigned long gapstart, gapsize, round;
+- unsigned long last;
+- int i;
+- int found = 0;
+-
+- last = 0x100000000ull;
+- gapstart = 0x10000000;
+- gapsize = 0x400000;
+- i = nr_map;
+- while (--i >= 0) {
+- unsigned long long start = e820[i].addr;
+- unsigned long long end = start + e820[i].size;
+-
+- /*
+- * Since "last" is at most 4GB, we know we'll
+- * fit in 32 bits if this condition is true
+- */
+- if (last > end) {
+- unsigned long gap = last - end;
+-
+- if (gap > gapsize) {
+- gapsize = gap;
+- gapstart = end;
+- found = 1;
+- }
+- }
+- if (start < last)
+- last = start;
+- }
+-
+- if (!found) {
+- gapstart = (end_pfn << PAGE_SHIFT) + 1024*1024;
+- printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit "
+- "address range\n"
+- KERN_ERR "PCI: Unassigned devices with 32bit resource "
+- "registers may break!\n");
+- }
+-
+- /*
+- * See how much we want to round up: start off with
+- * rounding to the next 1MB area.
+- */
+- round = 0x100000;
+- while ((gapsize >> 4) > round)
+- round += round;
+- /* Fun with two's complement */
+- pci_mem_start = (gapstart + round) & -round;
+-
+- printk(KERN_INFO
+- "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
+- pci_mem_start, gapstart, gapsize);
+-}
+-
+-int __init arch_get_ram_range(int slot, u64 *addr, u64 *size)
+-{
+- int i;
+-
+- if (slot < 0 || slot >= e820.nr_map)
+- return -1;
+- for (i = slot; i < e820.nr_map; i++) {
+- if (e820.map[i].type != E820_RAM)
+- continue;
+- break;
+- }
+- if (i == e820.nr_map || e820.map[i].addr > (max_pfn << PAGE_SHIFT))
+- return -1;
+- *addr = e820.map[i].addr;
+- *size = min_t(u64, e820.map[i].size + e820.map[i].addr,
+- max_pfn << PAGE_SHIFT) - *addr;
+- return i + 1;
+-}
+Index: head-2008-12-01/arch/x86/kernel/early_printk-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/early_printk-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/early_printk-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -225,7 +225,7 @@ static struct console simnow_console = {
+ static struct console *early_console = &early_vga_console;
+ static int early_console_initialized;
+
+-void early_printk(const char *fmt, ...)
++asmlinkage void early_printk(const char *fmt, ...)
+ {
+ char buf[512];
+ int n;
+Index: head-2008-12-01/arch/x86/kernel/entry_32-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_32-xen.S 2008-12-01 11:49:07.000000000 +0100
+@@ -51,15 +51,26 @@
+ #include <asm/percpu.h>
+ #include <asm/dwarf2.h>
+ #include <asm/processor-flags.h>
+-#include "irq_vectors.h"
++#include <asm/ftrace.h>
++#include <asm/irq_vectors.h>
+ #include <xen/interface/xen.h>
+
++/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */
++#include <linux/elf-em.h>
++#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
++#define __AUDIT_ARCH_LE 0x40000000
++
++#ifndef CONFIG_AUDITSYSCALL
++#define sysenter_audit syscall_trace_entry
++#define sysexit_audit syscall_exit_work
++#endif
++
+ /*
+ * We use macros for low-level operations which need to be overridden
+ * for paravirtualization. The following will never clobber any registers:
+ * INTERRUPT_RETURN (aka. "iret")
+ * GET_CR0_INTO_EAX (aka. "movl %cr0, %eax")
+- * ENABLE_INTERRUPTS_SYSCALL_RET (aka "sti; sysexit").
++ * ENABLE_INTERRUPTS_SYSEXIT (aka "sti; sysexit").
+ *
+ * For DISABLE_INTERRUPTS/ENABLE_INTERRUPTS (aka "cli"/"sti"), you must
+ * specify what registers can be overwritten (CLBR_NONE, CLBR_EAX/EDX/ECX/ANY).
+@@ -277,11 +288,6 @@ END(resume_kernel)
+ #endif
+ CFI_ENDPROC
+
+- .macro test_tif ti_reg # system call tracing in operation / emulation
+- /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
+- testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(\ti_reg)
+- .endm
+-
+ /* SYSENTER_RETURN points to after the "sysenter" instruction in
+ the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */
+
+@@ -338,8 +344,9 @@ sysenter_past_esp:
+ .previous
+
+ GET_THREAD_INFO(%ebp)
+- test_tif %ebp
+- jnz syscall_trace_entry
++ testw $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
++ jnz sysenter_audit
++sysenter_do_call:
+ cmpl $(nr_syscalls), %eax
+ jae syscall_badsys
+ call *sys_call_table(,%eax,4)
+@@ -349,14 +356,54 @@ sysenter_past_esp:
+ TRACE_IRQS_OFF
+ movl TI_flags(%ebp), %ecx
+ testw $_TIF_ALLWORK_MASK, %cx
+- jne syscall_exit_work
++ jne sysexit_audit
++sysenter_exit:
+ /* if something modifies registers it must also disable sysexit */
+ movl PT_EIP(%esp), %edx
+ movl PT_OLDESP(%esp), %ecx
+ xorl %ebp,%ebp
+ TRACE_IRQS_ON
+ 1: mov PT_FS(%esp), %fs
+- ENABLE_INTERRUPTS_SYSCALL_RET
++ ENABLE_INTERRUPTS_SYSEXIT
++
++#ifdef CONFIG_AUDITSYSCALL
++sysenter_audit:
++ testw $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
++ jnz syscall_trace_entry
++ addl $4,%esp
++ CFI_ADJUST_CFA_OFFSET -4
++ /* %esi already in 8(%esp) 6th arg: 4th syscall arg */
++ /* %edx already in 4(%esp) 5th arg: 3rd syscall arg */
++ /* %ecx already in 0(%esp) 4th arg: 2nd syscall arg */
++ movl %ebx,%ecx /* 3rd arg: 1st syscall arg */
++ movl %eax,%edx /* 2nd arg: syscall number */
++ movl $AUDIT_ARCH_I386,%eax /* 1st arg: audit arch */
++ call audit_syscall_entry
++ pushl %ebx
++ CFI_ADJUST_CFA_OFFSET 4
++ movl PT_EAX(%esp),%eax /* reload syscall number */
++ jmp sysenter_do_call
++
++sysexit_audit:
++ testw $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %cx
++ jne syscall_exit_work
++ TRACE_IRQS_ON
++ ENABLE_INTERRUPTS(CLBR_ANY)
++ movl %eax,%edx /* second arg, syscall return value */
++ cmpl $0,%eax /* is it < 0? */
++ setl %al /* 1 if so, 0 if not */
++ movzbl %al,%eax /* zero-extend that */
++ inc %eax /* first arg, 0->1(AUDITSC_SUCCESS), 1->2(AUDITSC_FAILURE) */
++ call audit_syscall_exit
++ DISABLE_INTERRUPTS(CLBR_ANY)
++ TRACE_IRQS_OFF
++ movl TI_flags(%ebp), %ecx
++ testw $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %cx
++ jne syscall_exit_work
++ movl PT_EAX(%esp),%eax /* reload syscall return value */
++ jmp sysenter_exit
++#endif
++
+ CFI_ENDPROC
+ .pushsection .fixup,"ax"
+ 2: movl $0,PT_FS(%esp)
+@@ -400,7 +447,7 @@ ENTRY(system_call)
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+- test_tif %ebp
++ testw $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
+ jnz syscall_trace_entry
+ cmpl $(nr_syscalls), %eax
+ jae syscall_badsys
+@@ -413,10 +460,6 @@ syscall_exit:
+ # setting need_resched or sigpending
+ # between sampling and the iret
+ TRACE_IRQS_OFF
+- testl $X86_EFLAGS_TF,PT_EFLAGS(%esp) # If tracing set singlestep flag on exit
+- jz no_singlestep
+- orl $_TIF_SINGLESTEP,TI_flags(%ebp)
+-no_singlestep:
+ movl TI_flags(%ebp), %ecx
+ testw $_TIF_ALLWORK_MASK, %cx # current->work
+ jne syscall_exit_work
+@@ -588,12 +631,8 @@ END(work_pending)
+ syscall_trace_entry:
+ movl $-ENOSYS,PT_EAX(%esp)
+ movl %esp, %eax
+- xorl %edx,%edx
+- call do_syscall_trace
+- cmpl $0, %eax
+- jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU,
+- # so must skip actual syscall
+- movl PT_ORIG_EAX(%esp), %eax
++ call syscall_trace_enter
++ /* What it returned is what we'll actually use. */
+ cmpl $(nr_syscalls), %eax
+ jnae syscall_call
+ jmp syscall_exit
+@@ -602,14 +641,13 @@ END(syscall_trace_entry)
+ # perform syscall exit tracing
+ ALIGN
+ syscall_exit_work:
+- testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl
++ testb $_TIF_WORK_SYSCALL_EXIT, %cl
+ jz work_pending
+ TRACE_IRQS_ON
+- ENABLE_INTERRUPTS(CLBR_ANY) # could let do_syscall_trace() call
++ ENABLE_INTERRUPTS(CLBR_ANY) # could let syscall_trace_leave() call
+ # schedule() instead
+ movl %esp, %eax
+- movl $1, %edx
+- call do_syscall_trace
++ call syscall_trace_leave
+ jmp resume_userspace
+ END(syscall_exit_work)
+ CFI_ENDPROC
+@@ -1109,10 +1147,10 @@ ENTRY(native_iret)
+ .previous
+ END(native_iret)
+
+-ENTRY(native_irq_enable_syscall_ret)
++ENTRY(native_irq_enable_sysexit)
+ sti
+ sysexit
+-END(native_irq_enable_syscall_ret)
++END(native_irq_enable_sysexit)
+ #endif
+
+ KPROBE_ENTRY(int3)
+@@ -1261,6 +1299,77 @@ ENTRY(kernel_thread_helper)
+ CFI_ENDPROC
+ ENDPROC(kernel_thread_helper)
+
++#ifdef CONFIG_FTRACE
++#ifdef CONFIG_DYNAMIC_FTRACE
++
++ENTRY(mcount)
++ pushl %eax
++ pushl %ecx
++ pushl %edx
++ movl 0xc(%esp), %eax
++ subl $MCOUNT_INSN_SIZE, %eax
++
++.globl mcount_call
++mcount_call:
++ call ftrace_stub
++
++ popl %edx
++ popl %ecx
++ popl %eax
++
++ ret
++END(mcount)
++
++ENTRY(ftrace_caller)
++ pushl %eax
++ pushl %ecx
++ pushl %edx
++ movl 0xc(%esp), %eax
++ movl 0x4(%ebp), %edx
++ subl $MCOUNT_INSN_SIZE, %eax
++
++.globl ftrace_call
++ftrace_call:
++ call ftrace_stub
++
++ popl %edx
++ popl %ecx
++ popl %eax
++
++.globl ftrace_stub
++ftrace_stub:
++ ret
++END(ftrace_caller)
++
++#else /* ! CONFIG_DYNAMIC_FTRACE */
++
++ENTRY(mcount)
++ cmpl $ftrace_stub, ftrace_trace_function
++ jnz trace
++.globl ftrace_stub
++ftrace_stub:
++ ret
++
++ /* taken from glibc */
++trace:
++ pushl %eax
++ pushl %ecx
++ pushl %edx
++ movl 0xc(%esp), %eax
++ movl 0x4(%ebp), %edx
++ subl $MCOUNT_INSN_SIZE, %eax
++
++ call *ftrace_trace_function
++
++ popl %edx
++ popl %ecx
++ popl %eax
++
++ jmp ftrace_stub
++END(mcount)
++#endif /* CONFIG_DYNAMIC_FTRACE */
++#endif /* CONFIG_FTRACE */
++
+ #include <asm/alternative-asm.h>
+
+ # pv syscall call handler stub
+@@ -1286,7 +1395,7 @@ ENTRY(ia32pv_cstar_target)
+ .previous
+ SAVE_ALL
+ GET_THREAD_INFO(%ebp)
+- test_tif %ebp
++ testw $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
+ jnz cstar_trace_entry
+ cmpl $nr_syscalls,%eax
+ jae cstar_badsys
+@@ -1320,29 +1429,21 @@ cstar_trace_entry:
+ btl %eax,cstar_special
+ jc .Lcstar_trace_special
+ 1: movl %esp,%eax
+- xorl %edx,%edx
+ LOCK_PREFIX
+ orl $_TIF_CSTAR,TI_flags(%ebp)
+- call do_syscall_trace
++ call syscall_trace_enter
+ LOCK_PREFIX
+ andl $~_TIF_CSTAR,TI_flags(%ebp)
+- testl %eax,%eax
+- jne .Lcstar_resume # ret != 0 -> running under PTRACE_SYSEMU,
+- # so must skip actual syscall
+- movl PT_ORIG_EAX(%esp),%eax
++ /* What it returned is what we'll actually use. */
+ cmpl $nr_syscalls,%eax
+ jb .Lcstar_call
+ jmp .Lcstar_exit
+ .Lcstar_trace_special:
+ movl PT_ECX(%esp),%ecx
+ movl %esp,%eax
+- xorl %edx,%edx
+ movl %ecx,PT_EBP(%esp) # put user EBP back in place
+- call do_syscall_trace
+- testl %eax,%eax
+- jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU,
+- # so must skip actual syscall
+- movl PT_ORIG_EAX(%esp),%eax
++ call syscall_trace_enter
++ /* What it returned is what we'll actually use. */
+ cmpl $nr_syscalls,%eax
+ jb syscall_call
+ jmp syscall_exit
+Index: head-2008-12-01/arch/x86/kernel/entry_64.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_64.S 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_64.S 2008-12-01 11:49:07.000000000 +0100
+@@ -1409,7 +1409,7 @@ ENTRY(arch_unwind_init_running)
+ ENDPROC(arch_unwind_init_running)
+ #endif
+
+-#ifdef CONFIG_XEN
++#ifdef CONFIG_PARAVIRT_XEN
+ ENTRY(xen_hypervisor_callback)
+ zeroentry xen_do_hypervisor_callback
+ END(xen_hypervisor_callback)
+@@ -1507,4 +1507,4 @@ ENTRY(xen_failsafe_callback)
+ CFI_ENDPROC
+ END(xen_failsafe_callback)
+
+-#endif /* CONFIG_XEN */
++#endif /* CONFIG_PARAVIRT_XEN */
+Index: head-2008-12-01/arch/x86/kernel/entry_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/entry_64-xen.S 2008-12-01 11:49:07.000000000 +0100
+@@ -53,19 +53,130 @@
+ #include <asm/hw_irq.h>
+ #include <asm/page.h>
+ #include <asm/irqflags.h>
++#include <asm/ftrace.h>
+ #include <asm/errno.h>
+ #include <xen/interface/xen.h>
+ #include <xen/interface/features.h>
+
++/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */
++#include <linux/elf-em.h>
++#define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
++#define __AUDIT_ARCH_64BIT 0x80000000
++#define __AUDIT_ARCH_LE 0x40000000
++
+ .code64
+
++#ifdef CONFIG_FTRACE
++#ifdef CONFIG_DYNAMIC_FTRACE
++ENTRY(mcount)
++
++ subq $0x38, %rsp
++ movq %rax, (%rsp)
++ movq %rcx, 8(%rsp)
++ movq %rdx, 16(%rsp)
++ movq %rsi, 24(%rsp)
++ movq %rdi, 32(%rsp)
++ movq %r8, 40(%rsp)
++ movq %r9, 48(%rsp)
++
++ movq 0x38(%rsp), %rdi
++ subq $MCOUNT_INSN_SIZE, %rdi
++
++.globl mcount_call
++mcount_call:
++ call ftrace_stub
++
++ movq 48(%rsp), %r9
++ movq 40(%rsp), %r8
++ movq 32(%rsp), %rdi
++ movq 24(%rsp), %rsi
++ movq 16(%rsp), %rdx
++ movq 8(%rsp), %rcx
++ movq (%rsp), %rax
++ addq $0x38, %rsp
++
++ retq
++END(mcount)
++
++ENTRY(ftrace_caller)
++
++ /* taken from glibc */
++ subq $0x38, %rsp
++ movq %rax, (%rsp)
++ movq %rcx, 8(%rsp)
++ movq %rdx, 16(%rsp)
++ movq %rsi, 24(%rsp)
++ movq %rdi, 32(%rsp)
++ movq %r8, 40(%rsp)
++ movq %r9, 48(%rsp)
++
++ movq 0x38(%rsp), %rdi
++ movq 8(%rbp), %rsi
++ subq $MCOUNT_INSN_SIZE, %rdi
++
++.globl ftrace_call
++ftrace_call:
++ call ftrace_stub
++
++ movq 48(%rsp), %r9
++ movq 40(%rsp), %r8
++ movq 32(%rsp), %rdi
++ movq 24(%rsp), %rsi
++ movq 16(%rsp), %rdx
++ movq 8(%rsp), %rcx
++ movq (%rsp), %rax
++ addq $0x38, %rsp
++
++.globl ftrace_stub
++ftrace_stub:
++ retq
++END(ftrace_caller)
++
++#else /* ! CONFIG_DYNAMIC_FTRACE */
++ENTRY(mcount)
++ cmpq $ftrace_stub, ftrace_trace_function
++ jnz trace
++.globl ftrace_stub
++ftrace_stub:
++ retq
++
++trace:
++ /* taken from glibc */
++ subq $0x38, %rsp
++ movq %rax, (%rsp)
++ movq %rcx, 8(%rsp)
++ movq %rdx, 16(%rsp)
++ movq %rsi, 24(%rsp)
++ movq %rdi, 32(%rsp)
++ movq %r8, 40(%rsp)
++ movq %r9, 48(%rsp)
++
++ movq 0x38(%rsp), %rdi
++ movq 8(%rbp), %rsi
++ subq $MCOUNT_INSN_SIZE, %rdi
++
++ call *ftrace_trace_function
++
++ movq 48(%rsp), %r9
++ movq 40(%rsp), %r8
++ movq 32(%rsp), %rdi
++ movq 24(%rsp), %rsi
++ movq 16(%rsp), %rdx
++ movq 8(%rsp), %rcx
++ movq (%rsp), %rax
++ addq $0x38, %rsp
++
++ jmp ftrace_stub
++END(mcount)
++#endif /* CONFIG_DYNAMIC_FTRACE */
++#endif /* CONFIG_FTRACE */
++
+ #ifndef CONFIG_PREEMPT
+ #define retint_kernel retint_restore_args
+ #endif
+
+ #ifdef CONFIG_PARAVIRT
+-ENTRY(native_irq_enable_syscall_ret)
+- movq %gs:pda_oldrsp,%rsp
++ENTRY(native_usergs_sysret64)
+ swapgs
+ sysretq
+ #endif /* CONFIG_PARAVIRT */
+@@ -102,7 +213,7 @@ NMI_MASK = 0x80000000
+ .macro FAKE_STACK_FRAME child_rip
+ /* push in order ss, rsp, eflags, cs, rip */
+ xorl %eax, %eax
+- pushq %rax /* ss */
++ pushq $__KERNEL_DS /* ss */
+ CFI_ADJUST_CFA_OFFSET 8
+ /*CFI_REL_OFFSET ss,0*/
+ pushq %rax /* rsp */
+@@ -197,13 +308,13 @@ ENTRY(ret_from_fork)
+ CFI_ADJUST_CFA_OFFSET -4
+ call schedule_tail
+ GET_THREAD_INFO(%rcx)
+- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),threadinfo_flags(%rcx)
++ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%rcx)
+ jnz rff_trace
+ rff_action:
+ RESTORE_REST
+ testl $3,CS-ARGOFFSET(%rsp) # from kernel_thread?
+ je int_ret_from_sys_call
+- testl $_TIF_IA32,threadinfo_flags(%rcx)
++ testl $_TIF_IA32,TI_flags(%rcx)
+ jnz int_ret_from_sys_call
+ RESTORE_TOP_OF_STACK %rdi,ARGOFFSET
+ jmp ret_from_sys_call
+@@ -265,8 +376,9 @@ ENTRY(system_call)
+ SAVE_ARGS -8,0
+ movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
+ GET_THREAD_INFO(%rcx)
+- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%rcx)
++ testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%rcx)
+ jnz tracesys
++system_call_fastpath:
+ cmpq $__NR_syscall_max,%rax
+ ja badsys
+ movq %r10,%rcx
+@@ -284,7 +396,7 @@ sysret_check:
+ GET_THREAD_INFO(%rcx)
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+- movl threadinfo_flags(%rcx),%edx
++ movl TI_flags(%rcx),%edx
+ andl %edi,%edx
+ jnz sysret_careful
+ CFI_REMEMBER_STATE
+@@ -315,16 +427,16 @@ sysret_careful:
+ sysret_signal:
+ TRACE_IRQS_ON
+ ENABLE_INTERRUPTS(CLBR_NONE)
+- testl $_TIF_DO_NOTIFY_MASK,%edx
+- jz 1f
+-
+- /* Really a signal */
++#ifdef CONFIG_AUDITSYSCALL
++ bt $TIF_SYSCALL_AUDIT,%edx
++ jc sysret_audit
++#endif
+ /* edx: work flags (arg3) */
+ leaq do_notify_resume(%rip),%rax
+ leaq -ARGOFFSET(%rsp),%rdi # &pt_regs -> arg1
+ xorl %esi,%esi # oldset -> arg2
+ call ptregscall_common
+-1: movl $_TIF_NEED_RESCHED,%edi
++ movl $_TIF_WORK_MASK,%edi
+ /* Use IRET because user could have changed frame. This
+ works because ptregscall_common has called FIXUP_TOP_OF_STACK. */
+ DISABLE_INTERRUPTS(CLBR_NONE)
+@@ -335,14 +447,56 @@ badsys:
+ movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
+ jmp ret_from_sys_call
+
++#ifdef CONFIG_AUDITSYSCALL
++ /*
++ * Fast path for syscall audit without full syscall trace.
++ * We just call audit_syscall_entry() directly, and then
++ * jump back to the normal fast path.
++ */
++auditsys:
++ movq %r10,%r9 /* 6th arg: 4th syscall arg */
++ movq %rdx,%r8 /* 5th arg: 3rd syscall arg */
++ movq %rsi,%rcx /* 4th arg: 2nd syscall arg */
++ movq %rdi,%rdx /* 3rd arg: 1st syscall arg */
++ movq %rax,%rsi /* 2nd arg: syscall number */
++ movl $AUDIT_ARCH_X86_64,%edi /* 1st arg: audit arch */
++ call audit_syscall_entry
++ LOAD_ARGS 0 /* reload call-clobbered registers */
++ jmp system_call_fastpath
++
++ /*
++ * Return fast path for syscall audit. Call audit_syscall_exit()
++ * directly and then jump back to the fast path with TIF_SYSCALL_AUDIT
++ * masked off.
++ */
++sysret_audit:
++ movq %rax,%rsi /* second arg, syscall return value */
++ cmpq $0,%rax /* is it < 0? */
++ setl %al /* 1 if so, 0 if not */
++ movzbl %al,%edi /* zero-extend that into %edi */
++ inc %edi /* first arg, 0->1(AUDITSC_SUCCESS), 1->2(AUDITSC_FAILURE) */
++ call audit_syscall_exit
++ movl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),%edi
++ jmp sysret_check
++#endif /* CONFIG_AUDITSYSCALL */
++
+ /* Do syscall tracing */
+ tracesys:
++#ifdef CONFIG_AUDITSYSCALL
++ testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%rcx)
++ jz auditsys
++#endif
+ SAVE_REST
+ movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */
+ FIXUP_TOP_OF_STACK %rdi
+ movq %rsp,%rdi
+ call syscall_trace_enter
+- LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
++ /*
++ * Reload arg registers from stack in case ptrace changed them.
++ * We don't reload %rax because syscall_trace_enter() returned
++ * the value it wants us to use in the table lookup.
++ */
++ LOAD_ARGS ARGOFFSET, 1
+ RESTORE_REST
+ cmpq $__NR_syscall_max,%rax
+ ja int_ret_from_sys_call /* RAX(%rsp) set to -ENOSYS above */
+@@ -356,6 +510,7 @@ tracesys:
+ * Has correct top of stack, but partial stack frame.
+ */
+ .globl int_ret_from_sys_call
++ .globl int_with_check
+ int_ret_from_sys_call:
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+@@ -370,10 +525,10 @@ int_ret_from_sys_call:
+ int_with_check:
+ LOCKDEP_SYS_EXIT_IRQ
+ GET_THREAD_INFO(%rcx)
+- movl threadinfo_flags(%rcx),%edx
++ movl TI_flags(%rcx),%edx
+ andl %edi,%edx
+ jnz int_careful
+- andl $~TS_COMPAT,threadinfo_status(%rcx)
++ andl $~TS_COMPAT,TI_status(%rcx)
+ jmp retint_restore_args
+
+ /* Either reschedule or signal or syscall exit tracking needed. */
+@@ -399,7 +554,7 @@ int_very_careful:
+ ENABLE_INTERRUPTS(CLBR_NONE)
+ SAVE_REST
+ /* Check for syscall exit trace */
+- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edx
++ testl $_TIF_WORK_SYSCALL_EXIT,%edx
+ jz int_signal
+ pushq %rdi
+ CFI_ADJUST_CFA_OFFSET 8
+@@ -407,7 +562,7 @@ int_very_careful:
+ call syscall_trace_leave
+ popq %rdi
+ CFI_ADJUST_CFA_OFFSET -8
+- andl $~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edi
++ andl $~(_TIF_WORK_SYSCALL_EXIT|_TIF_SYSCALL_EMU),%edi
+ jmp int_restore_rest
+
+ int_signal:
+@@ -416,7 +571,7 @@ int_signal:
+ movq %rsp,%rdi # &ptregs -> arg1
+ xorl %esi,%esi # oldset -> arg2
+ call do_notify_resume
+-1: movl $_TIF_NEED_RESCHED,%edi
++1: movl $_TIF_WORK_MASK,%edi
+ int_restore_rest:
+ RESTORE_REST
+ DISABLE_INTERRUPTS(CLBR_NONE)
+@@ -443,7 +598,6 @@ END(\label)
+ PTREGSCALL stub_clone, sys_clone, %r8
+ PTREGSCALL stub_fork, sys_fork, %rdi
+ PTREGSCALL stub_vfork, sys_vfork, %rdi
+- PTREGSCALL stub_rt_sigsuspend, sys_rt_sigsuspend, %rdx
+ PTREGSCALL stub_sigaltstack, sys_sigaltstack, %rdx
+ PTREGSCALL stub_iopl, sys_iopl, %rsi
+
+@@ -517,10 +671,12 @@ END(stub_rt_sigreturn)
+ *
+ */
+
+-retint_check:
++retint_with_reschedule:
+ CFI_DEFAULT_STACK adj=1
++ movl $_TIF_WORK_MASK,%edi
++retint_check:
+ LOCKDEP_SYS_EXIT_IRQ
+- movl threadinfo_flags(%rcx),%edx
++ movl TI_flags(%rcx),%edx
+ andl %edi,%edx
+ CFI_REMEMBER_STATE
+ jnz retint_careful
+@@ -565,17 +721,16 @@ retint_signal:
+ RESTORE_REST
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+- movl $_TIF_NEED_RESCHED,%edi
+ GET_THREAD_INFO(%rcx)
+- jmp retint_check
++ jmp retint_with_reschedule
+
+ #ifdef CONFIG_PREEMPT
+ /* Returning to kernel space. Check if we need preemption */
+ /* rcx: threadinfo. interrupts off. */
+ ENTRY(retint_kernel)
+- cmpl $0,threadinfo_preempt_count(%rcx)
++ cmpl $0,TI_preempt_count(%rcx)
+ jnz retint_restore_args
+- bt $TIF_NEED_RESCHED,threadinfo_flags(%rcx)
++ bt $TIF_NEED_RESCHED,TI_flags(%rcx)
+ jnc retint_restore_args
+ bt $9,EFLAGS-ARGOFFSET(%rsp) /* interrupts off? */
+ jnc retint_restore_args
+@@ -630,6 +785,9 @@ END(invalidate_interrupt\num)
+ ENTRY(call_function_interrupt)
+ apicinterrupt CALL_FUNCTION_VECTOR,smp_call_function_interrupt
+ END(call_function_interrupt)
++ENTRY(call_function_single_interrupt)
++ apicinterrupt CALL_FUNCTION_SINGLE_VECTOR,smp_call_function_single_interrupt
++END(call_function_single_interrupt)
+ ENTRY(irq_move_cleanup_interrupt)
+ apicinterrupt IRQ_MOVE_CLEANUP_VECTOR,smp_irq_move_cleanup_interrupt
+ END(irq_move_cleanup_interrupt)
+@@ -639,6 +797,10 @@ ENTRY(apic_timer_interrupt)
+ apicinterrupt LOCAL_TIMER_VECTOR,smp_apic_timer_interrupt
+ END(apic_timer_interrupt)
+
++ENTRY(uv_bau_message_intr1)
++ apicinterrupt 220,uv_bau_message_interrupt
++END(uv_bau_message_intr1)
++
+ ENTRY(error_interrupt)
+ apicinterrupt ERROR_APIC_VECTOR,smp_error_interrupt
+ END(error_interrupt)
+@@ -752,7 +914,7 @@ paranoid_restore\trace:
+ jmp irq_return
+ paranoid_userspace\trace:
+ GET_THREAD_INFO(%rcx)
+- movl threadinfo_flags(%rcx),%ebx
++ movl TI_flags(%rcx),%ebx
+ andl $_TIF_WORK_MASK,%ebx
+ jz paranoid_swapgs\trace
+ movq %rsp,%rdi /* &pt_regs */
+@@ -849,7 +1011,7 @@ error_exit:
+ testb $3,CS-ARGOFFSET(%rsp)
+ jz retint_kernel
+ LOCKDEP_SYS_EXIT_IRQ
+- movl threadinfo_flags(%rcx),%edx
++ movl TI_flags(%rcx),%edx
+ movl $_TIF_WORK_MASK,%edi
+ andl %edi,%edx
+ jnz retint_careful
+@@ -871,11 +1033,11 @@ error_kernelspace:
+ iret run with kernel gs again, so don't set the user space flag.
+ B stepping K8s sometimes report an truncated RIP for IRET
+ exceptions returning to compat mode. Check for these here too. */
+- leaq irq_return(%rip),%rbp
+- cmpq %rbp,RIP(%rsp)
++ leaq irq_return(%rip),%rcx
++ cmpq %rcx,RIP(%rsp)
+ je error_swapgs
+- movl %ebp,%ebp /* zero extend */
+- cmpq %rbp,RIP(%rsp)
++ movl %ecx,%ecx /* zero extend */
++ cmpq %rcx,RIP(%rsp)
+ je error_swapgs
+ cmpq $gs_change,RIP(%rsp)
+ je error_swapgs
+@@ -1121,6 +1283,7 @@ END(device_not_available)
+ /* runs on exception stack */
+ KPROBE_ENTRY(debug)
+ /* INTR_FRAME
++ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ pushq $0
+ CFI_ADJUST_CFA_OFFSET 8 */
+ zeroentry do_debug
+@@ -1148,6 +1311,7 @@ END(do_nmi_callback)
+
+ KPROBE_ENTRY(int3)
+ /* INTR_FRAME
++ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ pushq $0
+ CFI_ADJUST_CFA_OFFSET 8 */
+ zeroentry do_int3
+@@ -1171,14 +1335,11 @@ ENTRY(coprocessor_segment_overrun)
+ zeroentry do_coprocessor_segment_overrun
+ END(coprocessor_segment_overrun)
+
+-ENTRY(reserved)
+- zeroentry do_reserved
+-END(reserved)
+-
+ #if 0
+ /* runs on exception stack */
+ ENTRY(double_fault)
+ XCPT_FRAME
++ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ paranoidentry do_double_fault
+ jmp paranoid_exit1
+ CFI_ENDPROC
+@@ -1196,6 +1357,7 @@ END(segment_not_present)
+ /* runs on exception stack */
+ ENTRY(stack_segment)
+ /* XCPT_FRAME
++ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ paranoidentry do_stack_segment */
+ errorentry do_stack_segment
+ /* jmp paranoid_exit1
+@@ -1222,6 +1384,7 @@ END(spurious_interrupt_bug)
+ /* runs on exception stack */
+ ENTRY(machine_check)
+ INTR_FRAME
++ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ pushq $0
+ CFI_ADJUST_CFA_OFFSET 8
+ paranoidentry do_machine_check
+Index: head-2008-12-01/arch/x86/kernel/genapic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/genapic_64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/genapic_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -58,7 +58,7 @@ void __init setup_apic_routing(void)
+ else
+ #endif
+
+- if (num_possible_cpus() <= 8)
++ if (max_physical_apicid < 8)
+ genapic = &apic_flat;
+ else
+ genapic = &apic_physflat;
+@@ -121,4 +121,5 @@ int is_uv_system(void)
+ {
+ return uv_system_type != UV_NONE;
+ }
++EXPORT_SYMBOL_GPL(is_uv_system);
+ #endif
+Index: head-2008-12-01/arch/x86/kernel/genapic_xen_64.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/genapic_xen_64.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/genapic_xen_64.c 2008-12-01 11:49:07.000000000 +0100
+@@ -43,7 +43,7 @@ void xen_send_IPI_shortcut(unsigned int
+ __send_IPI_one(smp_processor_id(), vector);
+ break;
+ case APIC_DEST_ALLBUT:
+- for (cpu = 0; cpu < NR_CPUS; ++cpu) {
++ for_each_possible_cpu(cpu) {
+ if (cpu == smp_processor_id())
+ continue;
+ if (cpu_isset(cpu, cpu_online_map)) {
+@@ -52,7 +52,7 @@ void xen_send_IPI_shortcut(unsigned int
+ }
+ break;
+ case APIC_DEST_ALLINC:
+- for (cpu = 0; cpu < NR_CPUS; ++cpu) {
++ for_each_possible_cpu(cpu) {
+ if (cpu_isset(cpu, cpu_online_map)) {
+ __send_IPI_one(cpu, vector);
+ }
+@@ -81,8 +81,6 @@ static cpumask_t xen_vector_allocation_d
+ */
+ static void xen_init_apic_ldr(void)
+ {
+- Dprintk("%s\n", __FUNCTION__);
+- return;
+ }
+
+ static void xen_send_IPI_allbutself(int vector)
+@@ -92,14 +90,12 @@ static void xen_send_IPI_allbutself(int
+ * we get an APIC send error if we try to broadcast.
+ * thus we have to avoid sending IPIs in this case.
+ */
+- Dprintk("%s\n", __FUNCTION__);
+ if (num_online_cpus() > 1)
+ xen_send_IPI_shortcut(APIC_DEST_ALLBUT, vector, APIC_DEST_LOGICAL);
+ }
+
+ static void xen_send_IPI_all(int vector)
+ {
+- Dprintk("%s\n", __FUNCTION__);
+ xen_send_IPI_shortcut(APIC_DEST_ALLINC, vector, APIC_DEST_LOGICAL);
+ }
+
+@@ -109,11 +105,10 @@ static void xen_send_IPI_mask(cpumask_t
+ unsigned int cpu;
+ unsigned long flags;
+
+- Dprintk("%s\n", __FUNCTION__);
+ local_irq_save(flags);
+ WARN_ON(mask & ~cpus_addr(cpu_online_map)[0]);
+
+- for (cpu = 0; cpu < NR_CPUS; ++cpu) {
++ for_each_possible_cpu(cpu) {
+ if (cpu_isset(cpu, cpumask)) {
+ __send_IPI_one(cpu, vector);
+ }
+@@ -125,14 +120,12 @@ static void xen_send_IPI_mask(cpumask_t
+ static int xen_apic_id_registered(void)
+ {
+ /* better be set */
+- Dprintk("%s\n", __FUNCTION__);
+ return physid_isset(smp_processor_id(), phys_cpu_present_map);
+ }
+ #endif
+
+ static unsigned int xen_cpu_mask_to_apicid(cpumask_t cpumask)
+ {
+- Dprintk("%s\n", __FUNCTION__);
+ return cpus_addr(cpumask)[0] & APIC_ALL_CPUS;
+ }
+
+@@ -140,7 +133,6 @@ static unsigned int phys_pkg_id(int inde
+ {
+ u32 ebx;
+
+- Dprintk("%s\n", __FUNCTION__);
+ ebx = cpuid_ebx(1);
+ return ((ebx >> 24) & 0xFF) >> index_msb;
+ }
+Index: head-2008-12-01/arch/x86/kernel/head-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/arch/x86/kernel/head-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -0,0 +1,57 @@
++#include <linux/kernel.h>
++#include <linux/init.h>
++
++#include <asm/setup.h>
++#include <asm/bios_ebda.h>
++
++#define BIOS_LOWMEM_KILOBYTES 0x413
++
++/*
++ * The BIOS places the EBDA/XBDA at the top of conventional
++ * memory, and usually decreases the reported amount of
++ * conventional memory (int 0x12) too. This also contains a
++ * workaround for Dell systems that neglect to reserve EBDA.
++ * The same workaround also avoids a problem with the AMD768MPX
++ * chipset: reserve a page before VGA to prevent PCI prefetch
++ * into it (errata #56). Usually the page is reserved anyways,
++ * unless you have no PS/2 mouse plugged in.
++ */
++void __init reserve_ebda_region(void)
++{
++#ifndef CONFIG_XEN
++ unsigned int lowmem, ebda_addr;
++
++ /* To determine the position of the EBDA and the */
++ /* end of conventional memory, we need to look at */
++ /* the BIOS data area. In a paravirtual environment */
++ /* that area is absent. We'll just have to assume */
++ /* that the paravirt case can handle memory setup */
++ /* correctly, without our help. */
++ if (paravirt_enabled())
++ return;
++
++ /* end of low (conventional) memory */
++ lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES);
++ lowmem <<= 10;
++
++ /* start of EBDA area */
++ ebda_addr = get_bios_ebda();
++
++ /* Fixup: bios puts an EBDA in the top 64K segment */
++ /* of conventional memory, but does not adjust lowmem. */
++ if ((lowmem - ebda_addr) <= 0x10000)
++ lowmem = ebda_addr;
++
++ /* Fixup: bios does not report an EBDA at all. */
++ /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */
++ if ((ebda_addr == 0) && (lowmem >= 0x9f000))
++ lowmem = 0x9f000;
++
++ /* Paranoia: should never happen, but... */
++ if ((lowmem == 0) || (lowmem >= 0x100000))
++ lowmem = 0x9f000;
++
++ /* reserve all memory between lowmem and the 1MB mark */
++ reserve_early_overlap_ok(lowmem, 0x100000, "BIOS reserved");
++#endif
++}
+Index: head-2008-12-01/arch/x86/kernel/head32-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/arch/x86/kernel/head32-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -0,0 +1,57 @@
++/*
++ * linux/arch/i386/kernel/head32.c -- prepare to run common code
++ *
++ * Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
++ * Copyright (C) 2007 Eric Biederman <ebiederm@xmission.com>
++ */
++
++#include <linux/init.h>
++#include <linux/start_kernel.h>
++
++#include <asm/setup.h>
++#include <asm/sections.h>
++#include <asm/e820.h>
++#include <asm/bios_ebda.h>
++
++void __init i386_start_kernel(void)
++{
++ reserve_early(__pa_symbol(&_text), __pa_symbol(&_end), "TEXT DATA BSS");
++
++#ifndef CONFIG_XEN
++#ifdef CONFIG_BLK_DEV_INITRD
++ /* Reserve INITRD */
++ if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
++ u64 ramdisk_image = boot_params.hdr.ramdisk_image;
++ u64 ramdisk_size = boot_params.hdr.ramdisk_size;
++ u64 ramdisk_end = ramdisk_image + ramdisk_size;
++ reserve_early(ramdisk_image, ramdisk_end, "RAMDISK");
++ }
++#endif
++ reserve_early(init_pg_tables_start, init_pg_tables_end,
++ "INIT_PG_TABLE");
++#else
++ reserve_early(ALIGN(__pa_symbol(&_end), PAGE_SIZE),
++ __pa(xen_start_info->pt_base)
++ + (xen_start_info->nr_pt_frames << PAGE_SHIFT),
++ "Xen provided");
++
++ {
++ int max_cmdline;
++
++ if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
++ max_cmdline = COMMAND_LINE_SIZE;
++ memcpy(boot_command_line, xen_start_info->cmd_line, max_cmdline);
++ boot_command_line[max_cmdline-1] = '\0';
++ }
++#endif
++
++ reserve_ebda_region();
++
++ /*
++ * At this point everything still needed from the boot loader
++ * or BIOS or kernel text should be early reserved or marked not
++ * RAM in e820. All other memory is free game.
++ */
++
++ start_kernel();
++}
+Index: head-2008-12-01/arch/x86/kernel/head64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -32,7 +32,26 @@
+ #include <asm/e820.h>
+ #include <asm/bios_ebda.h>
+
+-unsigned long start_pfn;
++/* boot cpu pda */
++static struct x8664_pda _boot_cpu_pda __read_mostly;
++
++#ifdef CONFIG_SMP
++/*
++ * We install an empty cpu_pda pointer table to indicate to early users
++ * (numa_set_node) that the cpu_pda pointer table for cpus other than
++ * the boot cpu is not yet setup.
++ */
++static struct x8664_pda *__cpu_pda[NR_CPUS] __initdata;
++#else
++static struct x8664_pda *__cpu_pda[NR_CPUS] __read_mostly;
++#endif
++
++void __init x86_64_init_pda(void)
++{
++ _cpu_pda = __cpu_pda;
++ cpu_pda(0) = &_boot_cpu_pda;
++ pda_init(0);
++}
+
+ #ifndef CONFIG_XEN
+ static void __init zap_identity_mappings(void)
+@@ -77,83 +96,10 @@ EXPORT_SYMBOL(machine_to_phys_mapping);
+ unsigned int machine_to_phys_order;
+ EXPORT_SYMBOL(machine_to_phys_order);
+
+-#define BIOS_LOWMEM_KILOBYTES 0x413
+-
+-/*
+- * The BIOS places the EBDA/XBDA at the top of conventional
+- * memory, and usually decreases the reported amount of
+- * conventional memory (int 0x12) too. This also contains a
+- * workaround for Dell systems that neglect to reserve EBDA.
+- * The same workaround also avoids a problem with the AMD768MPX
+- * chipset: reserve a page before VGA to prevent PCI prefetch
+- * into it (errata #56). Usually the page is reserved anyways,
+- * unless you have no PS/2 mouse plugged in.
+- */
+-static void __init reserve_ebda_region(void)
+-{
+-#ifndef CONFIG_XEN
+- unsigned int lowmem, ebda_addr;
+-
+- /* To determine the position of the EBDA and the */
+- /* end of conventional memory, we need to look at */
+- /* the BIOS data area. In a paravirtual environment */
+- /* that area is absent. We'll just have to assume */
+- /* that the paravirt case can handle memory setup */
+- /* correctly, without our help. */
+- if (paravirt_enabled())
+- return;
+-
+- /* end of low (conventional) memory */
+- lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES);
+- lowmem <<= 10;
+-
+- /* start of EBDA area */
+- ebda_addr = get_bios_ebda();
+-
+- /* Fixup: bios puts an EBDA in the top 64K segment */
+- /* of conventional memory, but does not adjust lowmem. */
+- if ((lowmem - ebda_addr) <= 0x10000)
+- lowmem = ebda_addr;
+-
+- /* Fixup: bios does not report an EBDA at all. */
+- /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */
+- if ((ebda_addr == 0) && (lowmem >= 0x9f000))
+- lowmem = 0x9f000;
+-
+- /* Paranoia: should never happen, but... */
+- if ((lowmem == 0) || (lowmem >= 0x100000))
+- lowmem = 0x9f000;
+-
+- /* reserve all memory between lowmem and the 1MB mark */
+- reserve_early(lowmem, 0x100000, "BIOS reserved");
+-#endif
+-}
+-
+-static void __init reserve_setup_data(void)
+-{
+-#ifndef CONFIG_XEN
+- struct setup_data *data;
+- unsigned long pa_data;
+- char buf[32];
+-
+- if (boot_params.hdr.version < 0x0209)
+- return;
+- pa_data = boot_params.hdr.setup_data;
+- while (pa_data) {
+- data = early_ioremap(pa_data, sizeof(*data));
+- sprintf(buf, "setup data %x", data->type);
+- reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
+- pa_data = data->next;
+- early_iounmap(data, sizeof(*data));
+- }
+-#endif
+-}
+-
+ void __init x86_64_start_kernel(char * real_mode_data)
+ {
+ struct xen_machphys_mapping mapping;
+ unsigned long machine_to_phys_nr_ents;
+- int i;
+
+ /*
+ * Build-time sanity checks on the kernel image and module
+@@ -167,6 +113,7 @@ void __init x86_64_start_kernel(char * r
+ BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL));
+ BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) ==
+ (__START_KERNEL & PGDIR_MASK)));
++ BUILD_BUG_ON(__fix_to_virt(__end_of_fixed_addresses) <= MODULES_END);
+
+ xen_setup_features();
+
+@@ -174,8 +121,6 @@ void __init x86_64_start_kernel(char * r
+ if (!xen_feature(XENFEAT_auto_translated_physmap))
+ phys_to_machine_mapping =
+ (unsigned long *)xen_start_info->mfn_list;
+- start_pfn = (__pa(xen_start_info->pt_base) >> PAGE_SHIFT) +
+- xen_start_info->nr_pt_frames;
+
+ machine_to_phys_mapping = (unsigned long *)MACH2PHYS_VIRT_START;
+ machine_to_phys_nr_ents = MACH2PHYS_NR_ENTRIES;
+@@ -208,19 +153,23 @@ void __init x86_64_start_kernel(char * r
+
+ early_printk("Kernel alive\n");
+
+- for (i = 0; i < NR_CPUS; i++)
+- cpu_pda(i) = &boot_cpu_pda[i];
++ x86_64_init_pda();
+
+- pda_init(0);
++ early_printk("Kernel really alive\n");
++
++ x86_64_start_reservations(real_mode_data);
++}
++
++void __init x86_64_start_reservations(char *real_mode_data)
++{
+ copy_bootdata(__va(real_mode_data));
+
+ reserve_early(__pa_symbol(&_text), __pa_symbol(&_end), "TEXT DATA BSS");
+
+ reserve_early(round_up(__pa_symbol(&_end), PAGE_SIZE),
+- start_pfn << PAGE_SHIFT, "Xen provided");
+-
+- reserve_ebda_region();
+- reserve_setup_data();
++ __pa(xen_start_info->pt_base)
++ + (xen_start_info->nr_pt_frames << PAGE_SHIFT),
++ "Xen provided");
+
+ /*
+ * At this point everything still needed from the boot loader
+Index: head-2008-12-01/arch/x86/kernel/head_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head_64-xen.S 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head_64-xen.S 2008-12-01 11:49:07.000000000 +0100
+@@ -95,53 +95,6 @@ NEXT_PAGE(hypercall_page)
+
+ #undef NEXT_PAGE
+
+- .data
+-
+- .align 16
+- .globl cpu_gdt_descr
+-cpu_gdt_descr:
+- .word gdt_end-cpu_gdt_table-1
+-gdt:
+- .quad cpu_gdt_table
+-#ifdef CONFIG_SMP
+- .rept NR_CPUS-1
+- .word 0
+- .quad 0
+- .endr
+-#endif
+-
+-/* We need valid kernel segments for data and code in long mode too
+- * IRET will check the segment types kkeil 2000/10/28
+- * Also sysret mandates a special GDT layout
+- */
+-
+- .section .data.page_aligned, "aw"
+- .align PAGE_SIZE
+-
+-/* The TLS descriptors are currently at a different place compared to i386.
+- Hopefully nobody expects them at a fixed place (Wine?) */
+-
+-ENTRY(cpu_gdt_table)
+- .quad 0x0000000000000000 /* NULL descriptor */
+- .quad 0x00cf9b000000ffff /* __KERNEL32_CS */
+- .quad 0x00af9b000000ffff /* __KERNEL_CS */
+- .quad 0x00cf93000000ffff /* __KERNEL_DS */
+- .quad 0x00cffb000000ffff /* __USER32_CS */
+- .quad 0x00cff3000000ffff /* __USER_DS, __USER32_DS */
+- .quad 0x00affb000000ffff /* __USER_CS */
+- .quad 0x0 /* unused */
+- .quad 0,0 /* TSS */
+- .quad 0,0 /* LDT */
+- .quad 0,0,0 /* three TLS descriptors */
+- .quad 0x0000f40000000000 /* node/CPU stored in limit */
+-gdt_end:
+- /* asm/segment.h:GDT_ENTRIES must match this */
+- /* This should be a multiple of the cache line size */
+- /* GDTs of other CPUs are now dynamically allocated */
+-
+- /* zero the remaining page */
+- .fill PAGE_SIZE / 8 - GDT_ENTRIES,8,0
+-
+ .section .bss.page_aligned, "aw", @nobits
+ .align PAGE_SIZE
+ ENTRY(empty_zero_page)
+Index: head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_32-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -25,6 +25,7 @@
+ #include <linux/init.h>
+ #include <linux/delay.h>
+ #include <linux/sched.h>
++#include <linux/bootmem.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/compiler.h>
+ #include <linux/acpi.h>
+@@ -75,7 +76,7 @@ static struct { int pin, apic; } ioapic_
+ static DEFINE_SPINLOCK(ioapic_lock);
+ static DEFINE_SPINLOCK(vector_lock);
+
+-int timer_over_8254 __initdata = 1;
++int timer_through_8259 __initdata;
+
+ /*
+ * Is the SiS APIC rmw bug present ?
+@@ -89,15 +90,21 @@ int sis_apic_bug = -1;
+ int nr_ioapic_registers[MAX_IO_APICS];
+
+ /* I/O APIC entries */
+-struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
++struct mp_config_ioapic mp_ioapics[MAX_IO_APICS];
+ int nr_ioapics;
+
+ /* MP IRQ source entries */
+-struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
++struct mp_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
+
+ /* # of MP IRQ source entries */
+ int mp_irq_entries;
+
++#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
++int mp_bus_id_to_type[MAX_MP_BUSSES];
++#endif
++
++DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
++
+ static int disable_timer_pin_1 __initdata;
+
+ /*
+@@ -128,7 +135,7 @@ struct io_apic {
+ static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx)
+ {
+ return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx)
+- + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK);
++ + (mp_ioapics[idx].mp_apicaddr & ~PAGE_MASK);
+ }
+ #endif
+
+@@ -142,7 +149,7 @@ static inline unsigned int io_apic_read(
+ struct physdev_apic apic_op;
+ int ret;
+
+- apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.apic_physbase = mp_ioapics[apic].mp_apicaddr;
+ apic_op.reg = reg;
+ ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
+ if (ret)
+@@ -160,7 +167,7 @@ static inline void io_apic_write(unsigne
+ #else
+ struct physdev_apic apic_op;
+
+- apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.apic_physbase = mp_ioapics[apic].mp_apicaddr;
+ apic_op.reg = reg;
+ apic_op.value = value;
+ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op));
+@@ -288,7 +295,7 @@ static void __init replace_pin_at_irq(un
+ }
+ }
+
+-static void __modify_IO_APIC_irq (unsigned int irq, unsigned long enable, unsigned long disable)
++static void __modify_IO_APIC_irq(unsigned int irq, unsigned long enable, unsigned long disable)
+ {
+ struct irq_pin_list *entry = irq_2_pin + irq;
+ unsigned int pin, reg;
+@@ -308,30 +315,32 @@ static void __modify_IO_APIC_irq (unsign
+ }
+
+ /* mask = 1 */
+-static void __mask_IO_APIC_irq (unsigned int irq)
++static void __mask_IO_APIC_irq(unsigned int irq)
+ {
+- __modify_IO_APIC_irq(irq, 0x00010000, 0);
++ __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED, 0);
+ }
+
+ /* mask = 0 */
+-static void __unmask_IO_APIC_irq (unsigned int irq)
++static void __unmask_IO_APIC_irq(unsigned int irq)
+ {
+- __modify_IO_APIC_irq(irq, 0, 0x00010000);
++ __modify_IO_APIC_irq(irq, 0, IO_APIC_REDIR_MASKED);
+ }
+
+ /* mask = 1, trigger = 0 */
+-static void __mask_and_edge_IO_APIC_irq (unsigned int irq)
++static void __mask_and_edge_IO_APIC_irq(unsigned int irq)
+ {
+- __modify_IO_APIC_irq(irq, 0x00010000, 0x00008000);
++ __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED,
++ IO_APIC_REDIR_LEVEL_TRIGGER);
+ }
+
+ /* mask = 0, trigger = 1 */
+-static void __unmask_and_level_IO_APIC_irq (unsigned int irq)
++static void __unmask_and_level_IO_APIC_irq(unsigned int irq)
+ {
+- __modify_IO_APIC_irq(irq, 0x00008000, 0x00010000);
++ __modify_IO_APIC_irq(irq, IO_APIC_REDIR_LEVEL_TRIGGER,
++ IO_APIC_REDIR_MASKED);
+ }
+
+-static void mask_IO_APIC_irq (unsigned int irq)
++static void mask_IO_APIC_irq(unsigned int irq)
+ {
+ unsigned long flags;
+
+@@ -340,7 +349,7 @@ static void mask_IO_APIC_irq (unsigned i
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+
+-static void unmask_IO_APIC_irq (unsigned int irq)
++static void unmask_IO_APIC_irq(unsigned int irq)
+ {
+ unsigned long flags;
+
+@@ -352,7 +361,7 @@ static void unmask_IO_APIC_irq (unsigned
+ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
+ {
+ struct IO_APIC_route_entry entry;
+-
++
+ /* Check delivery_mode to be sure we're not clearing an SMI pin */
+ entry = ioapic_read_entry(apic, pin);
+ if (entry.delivery_mode == dest_SMI)
+@@ -364,7 +373,7 @@ static void clear_IO_APIC_pin(unsigned i
+ ioapic_mask_entry(apic, pin);
+ }
+
+-static void clear_IO_APIC (void)
++static void clear_IO_APIC(void)
+ {
+ int apic, pin;
+
+@@ -381,7 +390,7 @@ static void set_ioapic_affinity_irq(unsi
+ struct irq_pin_list *entry = irq_2_pin + irq;
+ unsigned int apicid_value;
+ cpumask_t tmp;
+-
++
+ cpus_and(tmp, cpumask, cpu_online_map);
+ if (cpus_empty(tmp))
+ tmp = TARGET_CPUS;
+@@ -410,7 +419,7 @@ static void set_ioapic_affinity_irq(unsi
+ # include <linux/kernel_stat.h> /* kstat */
+ # include <linux/slab.h> /* kmalloc() */
+ # include <linux/timer.h>
+-
++
+ #define IRQBALANCE_CHECK_ARCH -999
+ #define MAX_BALANCED_IRQ_INTERVAL (5*HZ)
+ #define MIN_BALANCED_IRQ_INTERVAL (HZ/2)
+@@ -422,14 +431,14 @@ static int physical_balance __read_mostl
+ static long balanced_irq_interval __read_mostly = MAX_BALANCED_IRQ_INTERVAL;
+
+ static struct irq_cpu_info {
+- unsigned long * last_irq;
+- unsigned long * irq_delta;
++ unsigned long *last_irq;
++ unsigned long *irq_delta;
+ unsigned long irq;
+ } irq_cpu_data[NR_CPUS];
+
+ #define CPU_IRQ(cpu) (irq_cpu_data[cpu].irq)
+-#define LAST_CPU_IRQ(cpu,irq) (irq_cpu_data[cpu].last_irq[irq])
+-#define IRQ_DELTA(cpu,irq) (irq_cpu_data[cpu].irq_delta[irq])
++#define LAST_CPU_IRQ(cpu, irq) (irq_cpu_data[cpu].last_irq[irq])
++#define IRQ_DELTA(cpu, irq) (irq_cpu_data[cpu].irq_delta[irq])
+
+ #define IDLE_ENOUGH(cpu,now) \
+ (idle_cpu(cpu) && ((now) - per_cpu(irq_stat, (cpu)).idle_timestamp > 1))
+@@ -468,8 +477,8 @@ inside:
+ if (cpu == -1)
+ cpu = NR_CPUS-1;
+ }
+- } while (!cpu_online(cpu) || !IRQ_ALLOWED(cpu,allowed_mask) ||
+- (search_idle && !IDLE_ENOUGH(cpu,now)));
++ } while (!cpu_online(cpu) || !IRQ_ALLOWED(cpu, allowed_mask) ||
++ (search_idle && !IDLE_ENOUGH(cpu, now)));
+
+ return cpu;
+ }
+@@ -479,15 +488,14 @@ static inline void balance_irq(int cpu,
+ unsigned long now = jiffies;
+ cpumask_t allowed_mask;
+ unsigned int new_cpu;
+-
++
+ if (irqbalance_disabled)
+- return;
++ return;
+
+ cpus_and(allowed_mask, cpu_online_map, balance_irq_affinity[irq]);
+ new_cpu = move(cpu, allowed_mask, now, 1);
+- if (cpu != new_cpu) {
++ if (cpu != new_cpu)
+ set_pending_irq(irq, cpumask_of_cpu(new_cpu));
+- }
+ }
+
+ static inline void rotate_irqs_among_cpus(unsigned long useful_load_threshold)
+@@ -499,14 +507,14 @@ static inline void rotate_irqs_among_cpu
+ if (!irq_desc[j].action)
+ continue;
+ /* Is it a significant load ? */
+- if (IRQ_DELTA(CPU_TO_PACKAGEINDEX(i),j) <
++ if (IRQ_DELTA(CPU_TO_PACKAGEINDEX(i), j) <
+ useful_load_threshold)
+ continue;
+ balance_irq(i, j);
+ }
+ }
+ balanced_irq_interval = max((long)MIN_BALANCED_IRQ_INTERVAL,
+- balanced_irq_interval - BALANCED_IRQ_LESS_DELTA);
++ balanced_irq_interval - BALANCED_IRQ_LESS_DELTA);
+ return;
+ }
+
+@@ -535,22 +543,22 @@ static void do_irq_balance(void)
+ /* Is this an active IRQ or balancing disabled ? */
+ if (!irq_desc[j].action || irq_balancing_disabled(j))
+ continue;
+- if ( package_index == i )
+- IRQ_DELTA(package_index,j) = 0;
++ if (package_index == i)
++ IRQ_DELTA(package_index, j) = 0;
+ /* Determine the total count per processor per IRQ */
+ value_now = (unsigned long) kstat_cpu(i).irqs[j];
+
+ /* Determine the activity per processor per IRQ */
+- delta = value_now - LAST_CPU_IRQ(i,j);
++ delta = value_now - LAST_CPU_IRQ(i, j);
+
+ /* Update last_cpu_irq[][] for the next time */
+- LAST_CPU_IRQ(i,j) = value_now;
++ LAST_CPU_IRQ(i, j) = value_now;
+
+ /* Ignore IRQs whose rate is less than the clock */
+ if (delta < useful_load_threshold)
+ continue;
+ /* update the load for the processor or package total */
+- IRQ_DELTA(package_index,j) += delta;
++ IRQ_DELTA(package_index, j) += delta;
+
+ /* Keep track of the higher numbered sibling as well */
+ if (i != package_index)
+@@ -576,7 +584,8 @@ static void do_irq_balance(void)
+ max_cpu_irq = ULONG_MAX;
+
+ tryanothercpu:
+- /* Look for heaviest loaded processor.
++ /*
++ * Look for heaviest loaded processor.
+ * We may come back to get the next heaviest loaded processor.
+ * Skip processors with trivial loads.
+ */
+@@ -585,7 +594,7 @@ tryanothercpu:
+ for_each_online_cpu(i) {
+ if (i != CPU_TO_PACKAGEINDEX(i))
+ continue;
+- if (max_cpu_irq <= CPU_IRQ(i))
++ if (max_cpu_irq <= CPU_IRQ(i))
+ continue;
+ if (tmp_cpu_irq < CPU_IRQ(i)) {
+ tmp_cpu_irq = CPU_IRQ(i);
+@@ -594,8 +603,9 @@ tryanothercpu:
+ }
+
+ if (tmp_loaded == -1) {
+- /* In the case of small number of heavy interrupt sources,
+- * loading some of the cpus too much. We use Ingo's original
++ /*
++ * In the case of small number of heavy interrupt sources,
++ * loading some of the cpus too much. We use Ingo's original
+ * approach to rotate them around.
+ */
+ if (!first_attempt && imbalance >= useful_load_threshold) {
+@@ -604,13 +614,14 @@ tryanothercpu:
+ }
+ goto not_worth_the_effort;
+ }
+-
++
+ first_attempt = 0; /* heaviest search */
+ max_cpu_irq = tmp_cpu_irq; /* load */
+ max_loaded = tmp_loaded; /* processor */
+ imbalance = (max_cpu_irq - min_cpu_irq) / 2;
+-
+- /* if imbalance is less than approx 10% of max load, then
++
++ /*
++ * if imbalance is less than approx 10% of max load, then
+ * observe diminishing returns action. - quit
+ */
+ if (imbalance < (max_cpu_irq >> 3))
+@@ -626,26 +637,25 @@ tryanotherirq:
+ /* Is this an active IRQ? */
+ if (!irq_desc[j].action)
+ continue;
+- if (imbalance <= IRQ_DELTA(max_loaded,j))
++ if (imbalance <= IRQ_DELTA(max_loaded, j))
+ continue;
+ /* Try to find the IRQ that is closest to the imbalance
+ * without going over.
+ */
+- if (move_this_load < IRQ_DELTA(max_loaded,j)) {
+- move_this_load = IRQ_DELTA(max_loaded,j);
++ if (move_this_load < IRQ_DELTA(max_loaded, j)) {
++ move_this_load = IRQ_DELTA(max_loaded, j);
+ selected_irq = j;
+ }
+ }
+- if (selected_irq == -1) {
++ if (selected_irq == -1)
+ goto tryanothercpu;
+- }
+
+ imbalance = move_this_load;
+-
++
+ /* For physical_balance case, we accumulated both load
+ * values in the one of the siblings cpu_irq[],
+ * to use the same code for physical and logical processors
+- * as much as possible.
++ * as much as possible.
+ *
+ * NOTE: the cpu_irq[] array holds the sum of the load for
+ * sibling A and sibling B in the slot for the lowest numbered
+@@ -674,11 +684,11 @@ tryanotherirq:
+ /* mark for change destination */
+ set_pending_irq(selected_irq, cpumask_of_cpu(min_loaded));
+
+- /* Since we made a change, come back sooner to
++ /* Since we made a change, come back sooner to
+ * check for more variation.
+ */
+ balanced_irq_interval = max((long)MIN_BALANCED_IRQ_INTERVAL,
+- balanced_irq_interval - BALANCED_IRQ_LESS_DELTA);
++ balanced_irq_interval - BALANCED_IRQ_LESS_DELTA);
+ return;
+ }
+ goto tryanotherirq;
+@@ -689,7 +699,7 @@ not_worth_the_effort:
+ * upward
+ */
+ balanced_irq_interval = min((long)MAX_BALANCED_IRQ_INTERVAL,
+- balanced_irq_interval + BALANCED_IRQ_MORE_DELTA);
++ balanced_irq_interval + BALANCED_IRQ_MORE_DELTA);
+ return;
+ }
+
+@@ -728,13 +738,13 @@ static int __init balanced_irq_init(void
+ cpumask_t tmp;
+
+ cpus_shift_right(tmp, cpu_online_map, 2);
+- c = &boot_cpu_data;
++ c = &boot_cpu_data;
+ /* When not overwritten by the command line ask subarchitecture. */
+ if (irqbalance_disabled == IRQBALANCE_CHECK_ARCH)
+ irqbalance_disabled = NO_BALANCE_IRQ;
+ if (irqbalance_disabled)
+ return 0;
+-
++
+ /* disable irqbalance completely if there is only one processor online */
+ if (num_online_cpus() < 2) {
+ irqbalance_disabled = 1;
+@@ -748,16 +758,14 @@ static int __init balanced_irq_init(void
+ physical_balance = 1;
+
+ for_each_online_cpu(i) {
+- irq_cpu_data[i].irq_delta = kmalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
+- irq_cpu_data[i].last_irq = kmalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
++ irq_cpu_data[i].irq_delta = kzalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
++ irq_cpu_data[i].last_irq = kzalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
+ if (irq_cpu_data[i].irq_delta == NULL || irq_cpu_data[i].last_irq == NULL) {
+ printk(KERN_ERR "balanced_irq_init: out of memory");
+ goto failed;
+ }
+- memset(irq_cpu_data[i].irq_delta,0,sizeof(unsigned long) * NR_IRQS);
+- memset(irq_cpu_data[i].last_irq,0,sizeof(unsigned long) * NR_IRQS);
+ }
+-
++
+ printk(KERN_INFO "Starting balanced_irq\n");
+ if (!IS_ERR(kthread_run(balanced_irq, NULL, "kirqd")))
+ return 0;
+@@ -799,7 +807,7 @@ void send_IPI_self(int vector)
+ /*
+ * Send the IPI. The write to APIC_ICR fires this off.
+ */
+- apic_write_around(APIC_ICR, cfg);
++ apic_write(APIC_ICR, cfg);
+ #endif
+ }
+ #endif /* !CONFIG_SMP */
+@@ -853,10 +861,10 @@ static int find_irq_entry(int apic, int
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++)
+- if (mp_irqs[i].mpc_irqtype == type &&
+- (mp_irqs[i].mpc_dstapic == mp_ioapics[apic].mpc_apicid ||
+- mp_irqs[i].mpc_dstapic == MP_APIC_ALL) &&
+- mp_irqs[i].mpc_dstirq == pin)
++ if (mp_irqs[i].mp_irqtype == type &&
++ (mp_irqs[i].mp_dstapic == mp_ioapics[apic].mp_apicid ||
++ mp_irqs[i].mp_dstapic == MP_APIC_ALL) &&
++ mp_irqs[i].mp_dstirq == pin)
+ return i;
+
+ return -1;
+@@ -871,13 +879,13 @@ static int __init find_isa_irq_pin(int i
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++) {
+- int lbus = mp_irqs[i].mpc_srcbus;
++ int lbus = mp_irqs[i].mp_srcbus;
+
+ if (test_bit(lbus, mp_bus_not_pci) &&
+- (mp_irqs[i].mpc_irqtype == type) &&
+- (mp_irqs[i].mpc_srcbusirq == irq))
++ (mp_irqs[i].mp_irqtype == type) &&
++ (mp_irqs[i].mp_srcbusirq == irq))
+
+- return mp_irqs[i].mpc_dstirq;
++ return mp_irqs[i].mp_dstirq;
+ }
+ return -1;
+ }
+@@ -887,17 +895,17 @@ static int __init find_isa_irq_apic(int
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++) {
+- int lbus = mp_irqs[i].mpc_srcbus;
++ int lbus = mp_irqs[i].mp_srcbus;
+
+ if (test_bit(lbus, mp_bus_not_pci) &&
+- (mp_irqs[i].mpc_irqtype == type) &&
+- (mp_irqs[i].mpc_srcbusirq == irq))
++ (mp_irqs[i].mp_irqtype == type) &&
++ (mp_irqs[i].mp_srcbusirq == irq))
+ break;
+ }
+ if (i < mp_irq_entries) {
+ int apic;
+- for(apic = 0; apic < nr_ioapics; apic++) {
+- if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic)
++ for (apic = 0; apic < nr_ioapics; apic++) {
++ if (mp_ioapics[apic].mp_apicid == mp_irqs[i].mp_dstapic)
+ return apic;
+ }
+ }
+@@ -918,28 +926,28 @@ int IO_APIC_get_PCI_irq_vector(int bus,
+
+ apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, "
+ "slot:%d, pin:%d.\n", bus, slot, pin);
+- if (mp_bus_id_to_pci_bus[bus] == -1) {
++ if (test_bit(bus, mp_bus_not_pci)) {
+ printk(KERN_WARNING "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
+ return -1;
+ }
+ for (i = 0; i < mp_irq_entries; i++) {
+- int lbus = mp_irqs[i].mpc_srcbus;
++ int lbus = mp_irqs[i].mp_srcbus;
+
+ for (apic = 0; apic < nr_ioapics; apic++)
+- if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic ||
+- mp_irqs[i].mpc_dstapic == MP_APIC_ALL)
++ if (mp_ioapics[apic].mp_apicid == mp_irqs[i].mp_dstapic ||
++ mp_irqs[i].mp_dstapic == MP_APIC_ALL)
+ break;
+
+ if (!test_bit(lbus, mp_bus_not_pci) &&
+- !mp_irqs[i].mpc_irqtype &&
++ !mp_irqs[i].mp_irqtype &&
+ (bus == lbus) &&
+- (slot == ((mp_irqs[i].mpc_srcbusirq >> 2) & 0x1f))) {
+- int irq = pin_2_irq(i,apic,mp_irqs[i].mpc_dstirq);
++ (slot == ((mp_irqs[i].mp_srcbusirq >> 2) & 0x1f))) {
++ int irq = pin_2_irq(i, apic, mp_irqs[i].mp_dstirq);
+
+ if (!(apic || IO_APIC_IRQ(irq)))
+ continue;
+
+- if (pin == (mp_irqs[i].mpc_srcbusirq & 3))
++ if (pin == (mp_irqs[i].mp_srcbusirq & 3))
+ return irq;
+ /*
+ * Use the first all-but-pin matching entry as a
+@@ -954,7 +962,7 @@ int IO_APIC_get_PCI_irq_vector(int bus,
+ EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
+
+ /*
+- * This function currently is only a helper for the i386 smp boot process where
++ * This function currently is only a helper for the i386 smp boot process where
+ * we need to reprogram the ioredtbls to cater for the cpus which have come online
+ * so mask in all cases should simply be TARGET_CPUS
+ */
+@@ -1008,7 +1016,7 @@ static int EISA_ELCR(unsigned int irq)
+ * EISA conforming in the MP table, that means its trigger type must
+ * be read in from the ELCR */
+
+-#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mpc_srcbusirq))
++#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mp_srcbusirq))
+ #define default_EISA_polarity(idx) default_ISA_polarity(idx)
+
+ /* PCI interrupts are always polarity one level triggered,
+@@ -1025,118 +1033,115 @@ static int EISA_ELCR(unsigned int irq)
+
+ static int MPBIOS_polarity(int idx)
+ {
+- int bus = mp_irqs[idx].mpc_srcbus;
++ int bus = mp_irqs[idx].mp_srcbus;
+ int polarity;
+
+ /*
+ * Determine IRQ line polarity (high active or low active):
+ */
+- switch (mp_irqs[idx].mpc_irqflag & 3)
++ switch (mp_irqs[idx].mp_irqflag & 3) {
++ case 0: /* conforms, ie. bus-type dependent polarity */
+ {
+- case 0: /* conforms, ie. bus-type dependent polarity */
+- {
+- polarity = test_bit(bus, mp_bus_not_pci)?
+- default_ISA_polarity(idx):
+- default_PCI_polarity(idx);
+- break;
+- }
+- case 1: /* high active */
+- {
+- polarity = 0;
+- break;
+- }
+- case 2: /* reserved */
+- {
+- printk(KERN_WARNING "broken BIOS!!\n");
+- polarity = 1;
+- break;
+- }
+- case 3: /* low active */
+- {
+- polarity = 1;
+- break;
+- }
+- default: /* invalid */
+- {
+- printk(KERN_WARNING "broken BIOS!!\n");
+- polarity = 1;
+- break;
+- }
++ polarity = test_bit(bus, mp_bus_not_pci)?
++ default_ISA_polarity(idx):
++ default_PCI_polarity(idx);
++ break;
++ }
++ case 1: /* high active */
++ {
++ polarity = 0;
++ break;
++ }
++ case 2: /* reserved */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ polarity = 1;
++ break;
++ }
++ case 3: /* low active */
++ {
++ polarity = 1;
++ break;
++ }
++ default: /* invalid */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ polarity = 1;
++ break;
++ }
+ }
+ return polarity;
+ }
+
+ static int MPBIOS_trigger(int idx)
+ {
+- int bus = mp_irqs[idx].mpc_srcbus;
++ int bus = mp_irqs[idx].mp_srcbus;
+ int trigger;
+
+ /*
+ * Determine IRQ trigger mode (edge or level sensitive):
+ */
+- switch ((mp_irqs[idx].mpc_irqflag>>2) & 3)
++ switch ((mp_irqs[idx].mp_irqflag>>2) & 3) {
++ case 0: /* conforms, ie. bus-type dependent */
+ {
+- case 0: /* conforms, ie. bus-type dependent */
+- {
+- trigger = test_bit(bus, mp_bus_not_pci)?
+- default_ISA_trigger(idx):
+- default_PCI_trigger(idx);
++ trigger = test_bit(bus, mp_bus_not_pci)?
++ default_ISA_trigger(idx):
++ default_PCI_trigger(idx);
+ #if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+- switch (mp_bus_id_to_type[bus])
+- {
+- case MP_BUS_ISA: /* ISA pin */
+- {
+- /* set before the switch */
+- break;
+- }
+- case MP_BUS_EISA: /* EISA pin */
+- {
+- trigger = default_EISA_trigger(idx);
+- break;
+- }
+- case MP_BUS_PCI: /* PCI pin */
+- {
+- /* set before the switch */
+- break;
+- }
+- case MP_BUS_MCA: /* MCA pin */
+- {
+- trigger = default_MCA_trigger(idx);
+- break;
+- }
+- default:
+- {
+- printk(KERN_WARNING "broken BIOS!!\n");
+- trigger = 1;
+- break;
+- }
+- }
+-#endif
++ switch (mp_bus_id_to_type[bus]) {
++ case MP_BUS_ISA: /* ISA pin */
++ {
++ /* set before the switch */
+ break;
+ }
+- case 1: /* edge */
++ case MP_BUS_EISA: /* EISA pin */
+ {
+- trigger = 0;
++ trigger = default_EISA_trigger(idx);
+ break;
+ }
+- case 2: /* reserved */
++ case MP_BUS_PCI: /* PCI pin */
+ {
+- printk(KERN_WARNING "broken BIOS!!\n");
+- trigger = 1;
++ /* set before the switch */
+ break;
+ }
+- case 3: /* level */
++ case MP_BUS_MCA: /* MCA pin */
+ {
+- trigger = 1;
++ trigger = default_MCA_trigger(idx);
+ break;
+ }
+- default: /* invalid */
++ default:
+ {
+ printk(KERN_WARNING "broken BIOS!!\n");
+- trigger = 0;
++ trigger = 1;
+ break;
+ }
+ }
++#endif
++ break;
++ }
++ case 1: /* edge */
++ {
++ trigger = 0;
++ break;
++ }
++ case 2: /* reserved */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ trigger = 1;
++ break;
++ }
++ case 3: /* level */
++ {
++ trigger = 1;
++ break;
++ }
++ default: /* invalid */
++ {
++ printk(KERN_WARNING "broken BIOS!!\n");
++ trigger = 0;
++ break;
++ }
++ }
+ return trigger;
+ }
+
+@@ -1153,16 +1158,16 @@ static inline int irq_trigger(int idx)
+ static int pin_2_irq(int idx, int apic, int pin)
+ {
+ int irq, i;
+- int bus = mp_irqs[idx].mpc_srcbus;
++ int bus = mp_irqs[idx].mp_srcbus;
+
+ /*
+ * Debugging check, we are in big trouble if this message pops up!
+ */
+- if (mp_irqs[idx].mpc_dstirq != pin)
++ if (mp_irqs[idx].mp_dstirq != pin)
+ printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n");
+
+ if (test_bit(bus, mp_bus_not_pci))
+- irq = mp_irqs[idx].mpc_srcbusirq;
++ irq = mp_irqs[idx].mp_srcbusirq;
+ else {
+ /*
+ * PCI IRQs are mapped in order
+@@ -1204,8 +1209,8 @@ static inline int IO_APIC_irq_trigger(in
+
+ for (apic = 0; apic < nr_ioapics; apic++) {
+ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+- idx = find_irq_entry(apic,pin,mp_INT);
+- if ((idx != -1) && (irq == pin_2_irq(idx,apic,pin)))
++ idx = find_irq_entry(apic, pin, mp_INT);
++ if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin)))
+ return irq_trigger(idx);
+ }
+ }
+@@ -1291,25 +1296,25 @@ static void __init setup_IO_APIC_irqs(vo
+ /*
+ * add it to the IO-APIC irq-routing table:
+ */
+- memset(&entry,0,sizeof(entry));
++ memset(&entry, 0, sizeof(entry));
+
+ entry.delivery_mode = INT_DELIVERY_MODE;
+ entry.dest_mode = INT_DEST_MODE;
+ entry.mask = 0; /* enable IRQ */
+- entry.dest.logical.logical_dest =
++ entry.dest.logical.logical_dest =
+ cpu_mask_to_apicid(TARGET_CPUS);
+
+- idx = find_irq_entry(apic,pin,mp_INT);
++ idx = find_irq_entry(apic, pin, mp_INT);
+ if (idx == -1) {
+ if (first_notcon) {
+ apic_printk(APIC_VERBOSE, KERN_DEBUG
+ " IO-APIC (apicid-pin) %d-%d",
+- mp_ioapics[apic].mpc_apicid,
++ mp_ioapics[apic].mp_apicid,
+ pin);
+ first_notcon = 0;
+ } else
+ apic_printk(APIC_VERBOSE, ", %d-%d",
+- mp_ioapics[apic].mpc_apicid, pin);
++ mp_ioapics[apic].mp_apicid, pin);
+ continue;
+ }
+
+@@ -1343,7 +1348,7 @@ static void __init setup_IO_APIC_irqs(vo
+ vector = assign_irq_vector(irq);
+ entry.vector = vector;
+ ioapic_register_intr(irq, vector, IOAPIC_AUTO);
+-
++
+ if (!apic && (irq < 16))
+ disable_8259A_irq(irq);
+ }
+@@ -1355,27 +1360,23 @@ static void __init setup_IO_APIC_irqs(vo
+ apic_printk(APIC_VERBOSE, " not connected.\n");
+ }
+
++#ifndef CONFIG_XEN
+ /*
+- * Set up the 8259A-master output pin:
++ * Set up the timer pin, possibly with the 8259A-master behind.
+ */
+-#ifndef CONFIG_XEN
+-static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, int vector)
++static void __init setup_timer_IRQ0_pin(unsigned int apic, unsigned int pin,
++ int vector)
+ {
+ struct IO_APIC_route_entry entry;
+
+- memset(&entry,0,sizeof(entry));
+-
+- disable_8259A_irq(0);
+-
+- /* mask LVT0 */
+- apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
++ memset(&entry, 0, sizeof(entry));
+
+ /*
+ * We use logical delivery to get the timer IRQ
+ * to the first CPU.
+ */
+ entry.dest_mode = INT_DEST_MODE;
+- entry.mask = 0; /* unmask IRQ now */
++ entry.mask = 1; /* mask IRQ now */
+ entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
+ entry.delivery_mode = INT_DELIVERY_MODE;
+ entry.polarity = 0;
+@@ -1384,17 +1385,14 @@ static void __init setup_ExtINT_IRQ0_pin
+
+ /*
+ * The timer IRQ doesn't have to know that behind the
+- * scene we have a 8259A-master in AEOI mode ...
++ * scene we may have a 8259A-master in AEOI mode ...
+ */
+- irq_desc[0].chip = &ioapic_chip;
+- set_irq_handler(0, handle_edge_irq);
++ ioapic_register_intr(0, vector, IOAPIC_EDGE);
+
+ /*
+ * Add it to the IO-APIC irq-routing table:
+ */
+ ioapic_write_entry(apic, pin, entry);
+-
+- enable_8259A_irq(0);
+ }
+
+ void __init print_IO_APIC(void)
+@@ -1409,10 +1407,10 @@ void __init print_IO_APIC(void)
+ if (apic_verbosity == APIC_QUIET)
+ return;
+
+- printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
++ printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
+ for (i = 0; i < nr_ioapics; i++)
+ printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n",
+- mp_ioapics[i].mpc_apicid, nr_ioapic_registers[i]);
++ mp_ioapics[i].mp_apicid, nr_ioapic_registers[i]);
+
+ /*
+ * We are a bit conservative about what we expect. We have to
+@@ -1431,7 +1429,7 @@ void __init print_IO_APIC(void)
+ reg_03.raw = io_apic_read(apic, 3);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+- printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mpc_apicid);
++ printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mp_apicid);
+ printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw);
+ printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID);
+ printk(KERN_DEBUG "....... : Delivery Type: %X\n", reg_00.bits.delivery_type);
+@@ -1512,7 +1510,7 @@ void __init print_IO_APIC(void)
+ return;
+ }
+
+-static void print_APIC_bitfield (int base)
++static void print_APIC_bitfield(int base)
+ {
+ unsigned int v;
+ int i, j;
+@@ -1533,7 +1531,7 @@ static void print_APIC_bitfield (int bas
+ }
+ }
+
+-void /*__init*/ print_local_APIC(void * dummy)
++void /*__init*/ print_local_APIC(void *dummy)
+ {
+ unsigned int v, ver, maxlvt;
+
+@@ -1542,6 +1540,7 @@ void /*__init*/ print_local_APIC(void *
+
+ printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
+ smp_processor_id(), hard_smp_processor_id());
++ v = apic_read(APIC_ID);
+ printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v,
+ GET_APIC_ID(read_apic_id()));
+ v = apic_read(APIC_LVR);
+@@ -1616,9 +1615,9 @@ void /*__init*/ print_local_APIC(void *
+ printk("\n");
+ }
+
+-void print_all_local_APICs (void)
++void print_all_local_APICs(void)
+ {
+- on_each_cpu(print_local_APIC, NULL, 1, 1);
++ on_each_cpu(print_local_APIC, NULL, 1);
+ }
+
+ void /*__init*/ print_PIC(void)
+@@ -1639,11 +1638,11 @@ void /*__init*/ print_PIC(void)
+ v = inb(0xa0) << 8 | inb(0x20);
+ printk(KERN_DEBUG "... PIC IRR: %04x\n", v);
+
+- outb(0x0b,0xa0);
+- outb(0x0b,0x20);
++ outb(0x0b, 0xa0);
++ outb(0x0b, 0x20);
+ v = inb(0xa0) << 8 | inb(0x20);
+- outb(0x0a,0xa0);
+- outb(0x0a,0x20);
++ outb(0x0a, 0xa0);
++ outb(0x0a, 0x20);
+
+ spin_unlock_irqrestore(&i8259A_lock, flags);
+
+@@ -1652,6 +1651,8 @@ void /*__init*/ print_PIC(void)
+ v = inb(0x4d1) << 8 | inb(0x4d0);
+ printk(KERN_DEBUG "... PIC ELCR: %04x\n", v);
+ }
++#else
++void __init print_IO_APIC(void) {}
+ #endif /* !CONFIG_XEN */
+
+ static void __init enable_IO_APIC(void)
+@@ -1681,7 +1682,7 @@ static void __init enable_IO_APIC(void)
+ nr_ioapic_registers[apic] = reg_01.bits.entries+1;
+ }
+ #ifndef CONFIG_XEN
+- for(apic = 0; apic < nr_ioapics; apic++) {
++ for (apic = 0; apic < nr_ioapics; apic++) {
+ int pin;
+ /* See if any of the pins is in ExtINT mode */
+ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+@@ -1774,7 +1775,7 @@ void disable_IO_APIC(void)
+ * by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999
+ */
+
+-#if !defined(CONFIG_XEN) && !defined(CONFIG_X86_NUMAQ)
++#ifndef CONFIG_XEN
+ static void __init setup_ioapic_ids_from_mpc(void)
+ {
+ union IO_APIC_reg_00 reg_00;
+@@ -1784,6 +1785,11 @@ static void __init setup_ioapic_ids_from
+ unsigned char old_id;
+ unsigned long flags;
+
++#ifdef CONFIG_X86_NUMAQ
++ if (found_numaq)
++ return;
++#endif
++
+ /*
+ * Don't check I/O APIC IDs for xAPIC systems. They have
+ * no meaning without the serial APIC bus.
+@@ -1806,15 +1812,15 @@ static void __init setup_ioapic_ids_from
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(apic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+-
+- old_id = mp_ioapics[apic].mpc_apicid;
+
+- if (mp_ioapics[apic].mpc_apicid >= get_physical_broadcast()) {
++ old_id = mp_ioapics[apic].mp_apicid;
++
++ if (mp_ioapics[apic].mp_apicid >= get_physical_broadcast()) {
+ printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n",
+- apic, mp_ioapics[apic].mpc_apicid);
++ apic, mp_ioapics[apic].mp_apicid);
+ printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
+ reg_00.bits.ID);
+- mp_ioapics[apic].mpc_apicid = reg_00.bits.ID;
++ mp_ioapics[apic].mp_apicid = reg_00.bits.ID;
+ }
+
+ /*
+@@ -1823,9 +1829,9 @@ static void __init setup_ioapic_ids_from
+ * 'stuck on smp_invalidate_needed IPI wait' messages.
+ */
+ if (check_apicid_used(phys_id_present_map,
+- mp_ioapics[apic].mpc_apicid)) {
++ mp_ioapics[apic].mp_apicid)) {
+ printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n",
+- apic, mp_ioapics[apic].mpc_apicid);
++ apic, mp_ioapics[apic].mp_apicid);
+ for (i = 0; i < get_physical_broadcast(); i++)
+ if (!physid_isset(i, phys_id_present_map))
+ break;
+@@ -1834,13 +1840,13 @@ static void __init setup_ioapic_ids_from
+ printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
+ i);
+ physid_set(i, phys_id_present_map);
+- mp_ioapics[apic].mpc_apicid = i;
++ mp_ioapics[apic].mp_apicid = i;
+ } else {
+ physid_mask_t tmp;
+- tmp = apicid_to_cpu_present(mp_ioapics[apic].mpc_apicid);
++ tmp = apicid_to_cpu_present(mp_ioapics[apic].mp_apicid);
+ apic_printk(APIC_VERBOSE, "Setting %d in the "
+ "phys_id_present_map\n",
+- mp_ioapics[apic].mpc_apicid);
++ mp_ioapics[apic].mp_apicid);
+ physids_or(phys_id_present_map, phys_id_present_map, tmp);
+ }
+
+@@ -1849,21 +1855,21 @@ static void __init setup_ioapic_ids_from
+ * We need to adjust the IRQ routing table
+ * if the ID changed.
+ */
+- if (old_id != mp_ioapics[apic].mpc_apicid)
++ if (old_id != mp_ioapics[apic].mp_apicid)
+ for (i = 0; i < mp_irq_entries; i++)
+- if (mp_irqs[i].mpc_dstapic == old_id)
+- mp_irqs[i].mpc_dstapic
+- = mp_ioapics[apic].mpc_apicid;
++ if (mp_irqs[i].mp_dstapic == old_id)
++ mp_irqs[i].mp_dstapic
++ = mp_ioapics[apic].mp_apicid;
+
+ /*
+ * Read the right value from the MPC table and
+ * write it into the ID register.
+- */
++ */
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "...changing IO-APIC physical APIC ID to %d ...",
+- mp_ioapics[apic].mpc_apicid);
++ mp_ioapics[apic].mp_apicid);
+
+- reg_00.bits.ID = mp_ioapics[apic].mpc_apicid;
++ reg_00.bits.ID = mp_ioapics[apic].mp_apicid;
+ spin_lock_irqsave(&ioapic_lock, flags);
+ io_apic_write(apic, 0, reg_00.raw);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+@@ -1874,17 +1880,13 @@ static void __init setup_ioapic_ids_from
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(apic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+- if (reg_00.bits.ID != mp_ioapics[apic].mpc_apicid)
++ if (reg_00.bits.ID != mp_ioapics[apic].mp_apicid)
+ printk("could not set ID!\n");
+ else
+ apic_printk(APIC_VERBOSE, " ok.\n");
+ }
+ }
+-#else
+-static void __init setup_ioapic_ids_from_mpc(void) { }
+-#endif
+
+-#ifndef CONFIG_XEN
+ int no_timer_check __initdata;
+
+ static int __init notimercheck(char *s)
+@@ -2077,45 +2079,53 @@ static inline void init_IO_APIC_traps(vo
+ * The local APIC irq-chip implementation:
+ */
+
+-static void ack_apic(unsigned int irq)
++static void ack_lapic_irq(unsigned int irq)
+ {
+ ack_APIC_irq();
+ }
+
+-static void mask_lapic_irq (unsigned int irq)
++static void mask_lapic_irq(unsigned int irq)
+ {
+ unsigned long v;
+
+ v = apic_read(APIC_LVT0);
+- apic_write_around(APIC_LVT0, v | APIC_LVT_MASKED);
++ apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
+ }
+
+-static void unmask_lapic_irq (unsigned int irq)
++static void unmask_lapic_irq(unsigned int irq)
+ {
+ unsigned long v;
+
+ v = apic_read(APIC_LVT0);
+- apic_write_around(APIC_LVT0, v & ~APIC_LVT_MASKED);
++ apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
+ }
+
+ static struct irq_chip lapic_chip __read_mostly = {
+- .name = "local-APIC-edge",
++ .name = "local-APIC",
+ .mask = mask_lapic_irq,
+ .unmask = unmask_lapic_irq,
+- .eoi = ack_apic,
++ .ack = ack_lapic_irq,
+ };
+
++static void lapic_register_intr(int irq, int vector)
++{
++ irq_desc[irq].status &= ~IRQ_LEVEL;
++ set_irq_chip_and_handler_name(irq, &lapic_chip, handle_edge_irq,
++ "edge");
++ set_intr_gate(vector, interrupt[irq]);
++}
++
+ static void __init setup_nmi(void)
+ {
+ /*
+- * Dirty trick to enable the NMI watchdog ...
++ * Dirty trick to enable the NMI watchdog ...
+ * We put the 8259A master into AEOI mode and
+ * unmask on all local APICs LVT0 as NMI.
+ *
+ * The idea to use the 8259A in AEOI mode ('8259A Virtual Wire')
+ * is from Maciej W. Rozycki - so we do not have to EOI from
+ * the NMI handler or the timer interrupt.
+- */
++ */
+ apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ...");
+
+ enable_NMI_through_LVT0();
+@@ -2191,11 +2201,16 @@ static inline void __init unlock_ExtINT_
+ static inline void __init check_timer(void)
+ {
+ int apic1, pin1, apic2, pin2;
++ int no_pin1 = 0;
+ int vector;
++ unsigned int ver;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
++ ver = apic_read(APIC_LVR);
++ ver = GET_APIC_VERSION(ver);
++
+ /*
+ * get/set the timer IRQ vector:
+ */
+@@ -2204,34 +2219,54 @@ static inline void __init check_timer(vo
+ set_intr_gate(vector, interrupt[0]);
+
+ /*
+- * Subtle, code in do_timer_interrupt() expects an AEOI
+- * mode for the 8259A whenever interrupts are routed
+- * through I/O APICs. Also IRQ0 has to be enabled in
+- * the 8259A which implies the virtual wire has to be
+- * disabled in the local APIC.
++ * As IRQ0 is to be enabled in the 8259A, the virtual
++ * wire has to be disabled in the local APIC. Also
++ * timer interrupts need to be acknowledged manually in
++ * the 8259A for the i82489DX when using the NMI
++ * watchdog as that APIC treats NMIs as level-triggered.
++ * The AEOI mode will finish them in the 8259A
++ * automatically.
+ */
+- apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
++ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
+ init_8259A(1);
+- timer_ack = 1;
+- if (timer_over_8254 > 0)
+- enable_8259A_irq(0);
++ timer_ack = (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver));
+
+ pin1 = find_isa_irq_pin(0, mp_INT);
+ apic1 = find_isa_irq_apic(0, mp_INT);
+ pin2 = ioapic_i8259.pin;
+ apic2 = ioapic_i8259.apic;
+
+- printk(KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
+- vector, apic1, pin1, apic2, pin2);
++ apic_printk(APIC_QUIET, KERN_INFO "..TIMER: vector=0x%02X "
++ "apic1=%d pin1=%d apic2=%d pin2=%d\n",
++ vector, apic1, pin1, apic2, pin2);
++
++ /*
++ * Some BIOS writers are clueless and report the ExtINTA
++ * I/O APIC input from the cascaded 8259A as the timer
++ * interrupt input. So just in case, if only one pin
++ * was found above, try it both directly and through the
++ * 8259A.
++ */
++ if (pin1 == -1) {
++ pin1 = pin2;
++ apic1 = apic2;
++ no_pin1 = 1;
++ } else if (pin2 == -1) {
++ pin2 = pin1;
++ apic2 = apic1;
++ }
+
+ if (pin1 != -1) {
+ /*
+ * Ok, does IRQ0 through the IOAPIC work?
+ */
++ if (no_pin1) {
++ add_pin_to_irq(0, apic1, pin1);
++ setup_timer_IRQ0_pin(apic1, pin1, vector);
++ }
+ unmask_IO_APIC_irq(0);
+ if (timer_irq_works()) {
+ if (nmi_watchdog == NMI_IO_APIC) {
+- disable_8259A_irq(0);
+ setup_nmi();
+ enable_8259A_irq(0);
+ }
+@@ -2240,71 +2275,77 @@ static inline void __init check_timer(vo
+ goto out;
+ }
+ clear_IO_APIC_pin(apic1, pin1);
+- printk(KERN_ERR "..MP-BIOS bug: 8254 timer not connected to "
+- "IO-APIC\n");
+- }
+-
+- printk(KERN_INFO "...trying to set up timer (IRQ0) through the 8259A ... ");
+- if (pin2 != -1) {
+- printk("\n..... (found pin %d) ...", pin2);
++ if (!no_pin1)
++ apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: "
++ "8254 timer not connected to IO-APIC\n");
++
++ apic_printk(APIC_QUIET, KERN_INFO "...trying to set up timer "
++ "(IRQ0) through the 8259A ...\n");
++ apic_printk(APIC_QUIET, KERN_INFO
++ "..... (found apic %d pin %d) ...\n", apic2, pin2);
+ /*
+ * legacy devices should be connected to IO APIC #0
+ */
+- setup_ExtINT_IRQ0_pin(apic2, pin2, vector);
++ replace_pin_at_irq(0, apic1, pin1, apic2, pin2);
++ setup_timer_IRQ0_pin(apic2, pin2, vector);
++ unmask_IO_APIC_irq(0);
++ enable_8259A_irq(0);
+ if (timer_irq_works()) {
+- printk("works.\n");
+- if (pin1 != -1)
+- replace_pin_at_irq(0, apic1, pin1, apic2, pin2);
+- else
+- add_pin_to_irq(0, apic2, pin2);
++ apic_printk(APIC_QUIET, KERN_INFO "....... works.\n");
++ timer_through_8259 = 1;
+ if (nmi_watchdog == NMI_IO_APIC) {
++ disable_8259A_irq(0);
+ setup_nmi();
++ enable_8259A_irq(0);
+ }
+ goto out;
+ }
+ /*
+ * Cleanup, just in case ...
+ */
++ disable_8259A_irq(0);
+ clear_IO_APIC_pin(apic2, pin2);
++ apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n");
+ }
+- printk(" failed.\n");
+
+ if (nmi_watchdog == NMI_IO_APIC) {
+- printk(KERN_WARNING "timer doesn't work through the IO-APIC - disabling NMI Watchdog!\n");
+- nmi_watchdog = 0;
++ apic_printk(APIC_QUIET, KERN_WARNING "timer doesn't work "
++ "through the IO-APIC - disabling NMI Watchdog!\n");
++ nmi_watchdog = NMI_NONE;
+ }
++ timer_ack = 0;
+
+- printk(KERN_INFO "...trying to set up timer as Virtual Wire IRQ...");
++ apic_printk(APIC_QUIET, KERN_INFO
++ "...trying to set up timer as Virtual Wire IRQ...\n");
+
+- disable_8259A_irq(0);
+- set_irq_chip_and_handler_name(0, &lapic_chip, handle_fasteoi_irq,
+- "fasteoi");
+- apic_write_around(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
++ lapic_register_intr(0, vector);
++ apic_write(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
+ enable_8259A_irq(0);
+
+ if (timer_irq_works()) {
+- printk(" works.\n");
++ apic_printk(APIC_QUIET, KERN_INFO "..... works.\n");
+ goto out;
+ }
+- apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
+- printk(" failed.\n");
++ disable_8259A_irq(0);
++ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
++ apic_printk(APIC_QUIET, KERN_INFO "..... failed.\n");
+
+- printk(KERN_INFO "...trying to set up timer as ExtINT IRQ...");
++ apic_printk(APIC_QUIET, KERN_INFO
++ "...trying to set up timer as ExtINT IRQ...\n");
+
+- timer_ack = 0;
+ init_8259A(0);
+ make_8259A_irq(0);
+- apic_write_around(APIC_LVT0, APIC_DM_EXTINT);
++ apic_write(APIC_LVT0, APIC_DM_EXTINT);
+
+ unlock_ExtINT_logic();
+
+ if (timer_irq_works()) {
+- printk(" works.\n");
++ apic_printk(APIC_QUIET, KERN_INFO "..... works.\n");
+ goto out;
+ }
+- printk(" failed :(.\n");
++ apic_printk(APIC_QUIET, KERN_INFO "..... failed :(.\n");
+ panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a "
+- "report. Then try booting with the 'noapic' option");
++ "report. Then try booting with the 'noapic' option.\n");
+ out:
+ local_irq_restore(flags);
+ }
+@@ -2314,11 +2355,21 @@ int timer_uses_ioapic_pin_0 = 0;
+ #endif
+
+ /*
+- *
+- * IRQ's that are handled by the PIC in the MPS IOAPIC case.
+- * - IRQ2 is the cascade IRQ, and cannot be a io-apic IRQ.
+- * Linux doesn't really care, as it's not actually used
+- * for any interrupt handling anyway.
++ * Traditionally ISA IRQ2 is the cascade IRQ, and is not available
++ * to devices. However there may be an I/O APIC pin available for
++ * this interrupt regardless. The pin may be left unconnected, but
++ * typically it will be reused as an ExtINT cascade interrupt for
++ * the master 8259A. In the MPS case such a pin will normally be
++ * reported as an ExtINT interrupt in the MP table. With ACPI
++ * there is no provision for ExtINT interrupts, and in the absence
++ * of an override it would be treated as an ordinary ISA I/O APIC
++ * interrupt, that is edge-triggered and unmasked by default. We
++ * used to do this, but it caused problems on some systems because
++ * of the NMI watchdog and sometimes IRQ0 of the 8254 timer using
++ * the same ExtINT cascade interrupt to drive the local APIC of the
++ * bootstrap processor. Therefore we refrain from routing IRQ2 to
++ * the I/O APIC in all cases now. No actual device should request
++ * it anyway. --macro
+ */
+ #define PIC_IRQS (1 << PIC_CASCADE_IR)
+
+@@ -2328,25 +2379,22 @@ void __init setup_IO_APIC(void)
+ int i;
+
+ /* Reserve all the system vectors. */
+- for (i = FIRST_SYSTEM_VECTOR; i < NR_VECTORS; i++)
++ for (i = first_system_vector; i < NR_VECTORS; i++)
+ set_bit(i, used_vectors);
+ #endif
+
+ enable_IO_APIC();
+
+- if (acpi_ioapic)
+- io_apic_irqs = ~0; /* all IRQs go through IOAPIC */
+- else
+- io_apic_irqs = ~PIC_IRQS;
++ io_apic_irqs = ~PIC_IRQS;
+
+ printk("ENABLING IO-APIC IRQs\n");
+
++#ifndef CONFIG_XEN
+ /*
+ * Set up IO-APIC IRQ routing.
+ */
+ if (!acpi_ioapic)
+ setup_ioapic_ids_from_mpc();
+-#ifndef CONFIG_XEN
+ sync_Arb_IDs();
+ #endif
+ setup_IO_APIC_irqs();
+@@ -2356,28 +2404,14 @@ void __init setup_IO_APIC(void)
+ print_IO_APIC();
+ }
+
+-static int __init setup_disable_8254_timer(char *s)
+-{
+- timer_over_8254 = -1;
+- return 1;
+-}
+-static int __init setup_enable_8254_timer(char *s)
+-{
+- timer_over_8254 = 2;
+- return 1;
+-}
+-
+-__setup("disable_8254_timer", setup_disable_8254_timer);
+-__setup("enable_8254_timer", setup_enable_8254_timer);
+-
+ /*
+ * Called after all the initialization is done. If we didnt find any
+ * APIC bugs then we can allow the modify fast path
+ */
+-
++
+ static int __init io_apic_bug_finalize(void)
+ {
+- if(sis_apic_bug == -1)
++ if (sis_apic_bug == -1)
+ sis_apic_bug = 0;
+ if (is_initial_xendomain()) {
+ struct xen_platform_op op = { .cmd = XENPF_platform_quirk };
+@@ -2396,17 +2430,17 @@ struct sysfs_ioapic_data {
+ struct sys_device dev;
+ struct IO_APIC_route_entry entry[0];
+ };
+-static struct sysfs_ioapic_data * mp_ioapic_data[MAX_IO_APICS];
++static struct sysfs_ioapic_data *mp_ioapic_data[MAX_IO_APICS];
+
+ static int ioapic_suspend(struct sys_device *dev, pm_message_t state)
+ {
+ struct IO_APIC_route_entry *entry;
+ struct sysfs_ioapic_data *data;
+ int i;
+-
++
+ data = container_of(dev, struct sysfs_ioapic_data, dev);
+ entry = data->entry;
+- for (i = 0; i < nr_ioapic_registers[dev->id]; i ++)
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i++)
+ entry[i] = ioapic_read_entry(dev->id, i);
+
+ return 0;
+@@ -2419,18 +2453,18 @@ static int ioapic_resume(struct sys_devi
+ unsigned long flags;
+ union IO_APIC_reg_00 reg_00;
+ int i;
+-
++
+ data = container_of(dev, struct sysfs_ioapic_data, dev);
+ entry = data->entry;
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(dev->id, 0);
+- if (reg_00.bits.ID != mp_ioapics[dev->id].mpc_apicid) {
+- reg_00.bits.ID = mp_ioapics[dev->id].mpc_apicid;
++ if (reg_00.bits.ID != mp_ioapics[dev->id].mp_apicid) {
++ reg_00.bits.ID = mp_ioapics[dev->id].mp_apicid;
+ io_apic_write(dev->id, 0, reg_00.raw);
+ }
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+- for (i = 0; i < nr_ioapic_registers[dev->id]; i ++)
++ for (i = 0; i < nr_ioapic_registers[dev->id]; i++)
+ ioapic_write_entry(dev->id, i, entry[i]);
+
+ return 0;
+@@ -2444,24 +2478,23 @@ static struct sysdev_class ioapic_sysdev
+
+ static int __init ioapic_init_sysfs(void)
+ {
+- struct sys_device * dev;
++ struct sys_device *dev;
+ int i, size, error = 0;
+
+ error = sysdev_class_register(&ioapic_sysdev_class);
+ if (error)
+ return error;
+
+- for (i = 0; i < nr_ioapics; i++ ) {
+- size = sizeof(struct sys_device) + nr_ioapic_registers[i]
++ for (i = 0; i < nr_ioapics; i++) {
++ size = sizeof(struct sys_device) + nr_ioapic_registers[i]
+ * sizeof(struct IO_APIC_route_entry);
+- mp_ioapic_data[i] = kmalloc(size, GFP_KERNEL);
++ mp_ioapic_data[i] = kzalloc(size, GFP_KERNEL);
+ if (!mp_ioapic_data[i]) {
+ printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i);
+ continue;
+ }
+- memset(mp_ioapic_data[i], 0, size);
+ dev = &mp_ioapic_data[i]->dev;
+- dev->id = i;
++ dev->id = i;
+ dev->cls = &ioapic_sysdev_class;
+ error = sysdev_register(dev);
+ if (error) {
+@@ -2538,7 +2571,7 @@ static int msi_compose_msg(struct pci_de
+ msg->address_lo =
+ MSI_ADDR_BASE_LO |
+ ((INT_DEST_MODE == 0) ?
+- MSI_ADDR_DEST_MODE_PHYSICAL:
++MSI_ADDR_DEST_MODE_PHYSICAL:
+ MSI_ADDR_DEST_MODE_LOGICAL) |
+ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
+ MSI_ADDR_REDIRECTION_CPU:
+@@ -2549,7 +2582,7 @@ static int msi_compose_msg(struct pci_de
+ MSI_DATA_TRIGGER_EDGE |
+ MSI_DATA_LEVEL_ASSERT |
+ ((INT_DELIVERY_MODE != dest_LowestPrio) ?
+- MSI_DATA_DELIVERY_FIXED:
++MSI_DATA_DELIVERY_FIXED:
+ MSI_DATA_DELIVERY_LOWPRI) |
+ MSI_DATA_VECTOR(vector);
+ }
+@@ -2720,12 +2753,12 @@ int arch_setup_ht_irq(unsigned int irq,
+ #endif /* CONFIG_HT_IRQ */
+
+ /* --------------------------------------------------------------------------
+- ACPI-based IOAPIC Configuration
++ ACPI-based IOAPIC Configuration
+ -------------------------------------------------------------------------- */
+
+ #ifdef CONFIG_ACPI
+
+-int __init io_apic_get_unique_id (int ioapic, int apic_id)
++int __init io_apic_get_unique_id(int ioapic, int apic_id)
+ {
+ #ifndef CONFIG_XEN
+ union IO_APIC_reg_00 reg_00;
+@@ -2735,10 +2768,10 @@ int __init io_apic_get_unique_id (int io
+ int i = 0;
+
+ /*
+- * The P4 platform supports up to 256 APIC IDs on two separate APIC
+- * buses (one for LAPICs, one for IOAPICs), where predecessors only
++ * The P4 platform supports up to 256 APIC IDs on two separate APIC
++ * buses (one for LAPICs, one for IOAPICs), where predecessors only
+ * supports up to 16 on one shared APIC bus.
+- *
++ *
+ * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full
+ * advantage of new APIC bus architecture.
+ */
+@@ -2757,7 +2790,7 @@ int __init io_apic_get_unique_id (int io
+ }
+
+ /*
+- * Every APIC in a system must have a unique ID or we get lots of nice
++ * Every APIC in a system must have a unique ID or we get lots of nice
+ * 'stuck on smp_invalidate_needed IPI wait' messages.
+ */
+ if (check_apicid_used(apic_id_map, apic_id)) {
+@@ -2774,7 +2807,7 @@ int __init io_apic_get_unique_id (int io
+ "trying %d\n", ioapic, apic_id, i);
+
+ apic_id = i;
+- }
++ }
+
+ tmp = apicid_to_cpu_present(apic_id);
+ physids_or(apic_id_map, apic_id_map, tmp);
+@@ -2802,7 +2835,7 @@ int __init io_apic_get_unique_id (int io
+ }
+
+
+-int __init io_apic_get_version (int ioapic)
++int __init io_apic_get_version(int ioapic)
+ {
+ union IO_APIC_reg_01 reg_01;
+ unsigned long flags;
+@@ -2815,7 +2848,7 @@ int __init io_apic_get_version (int ioap
+ }
+
+
+-int __init io_apic_get_redir_entries (int ioapic)
++int __init io_apic_get_redir_entries(int ioapic)
+ {
+ union IO_APIC_reg_01 reg_01;
+ unsigned long flags;
+@@ -2828,7 +2861,7 @@ int __init io_apic_get_redir_entries (in
+ }
+
+
+-int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low)
++int io_apic_set_pci_routing(int ioapic, int pin, int irq, int edge_level, int active_high_low)
+ {
+ struct IO_APIC_route_entry entry;
+
+@@ -2844,7 +2877,7 @@ int io_apic_set_pci_routing (int ioapic,
+ * corresponding device driver registers for this IRQ.
+ */
+
+- memset(&entry,0,sizeof(entry));
++ memset(&entry, 0, sizeof(entry));
+
+ entry.delivery_mode = INT_DELIVERY_MODE;
+ entry.dest_mode = INT_DEST_MODE;
+@@ -2863,7 +2896,7 @@ int io_apic_set_pci_routing (int ioapic,
+
+ apic_printk(APIC_DEBUG, KERN_DEBUG "IOAPIC[%d]: Set PCI routing entry "
+ "(%d-%d -> 0x%x -> IRQ %d Mode:%i Active:%i)\n", ioapic,
+- mp_ioapics[ioapic].mpc_apicid, pin, entry.vector, irq,
++ mp_ioapics[ioapic].mp_apicid, pin, entry.vector, irq,
+ edge_level, active_high_low);
+
+ ioapic_register_intr(irq, entry.vector, edge_level);
+@@ -2884,8 +2917,8 @@ int acpi_get_override_irq(int bus_irq, i
+ return -1;
+
+ for (i = 0; i < mp_irq_entries; i++)
+- if (mp_irqs[i].mpc_irqtype == mp_INT &&
+- mp_irqs[i].mpc_srcbusirq == bus_irq)
++ if (mp_irqs[i].mp_irqtype == mp_INT &&
++ mp_irqs[i].mp_srcbusirq == bus_irq)
+ break;
+ if (i >= mp_irq_entries)
+ return -1;
+@@ -2918,3 +2951,35 @@ static int __init parse_noapic(char *arg
+ return 0;
+ }
+ early_param("noapic", parse_noapic);
++
++#ifndef CONFIG_XEN
++void __init ioapic_init_mappings(void)
++{
++ unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
++ int i;
++
++ for (i = 0; i < nr_ioapics; i++) {
++ if (smp_found_config) {
++ ioapic_phys = mp_ioapics[i].mp_apicaddr;
++ if (!ioapic_phys) {
++ printk(KERN_ERR
++ "WARNING: bogus zero IO-APIC "
++ "address found in MPTABLE, "
++ "disabling IO/APIC support!\n");
++ smp_found_config = 0;
++ skip_ioapic_setup = 1;
++ goto fake_ioapic_page;
++ }
++ } else {
++fake_ioapic_page:
++ ioapic_phys = (unsigned long)
++ alloc_bootmem_pages(PAGE_SIZE);
++ ioapic_phys = __pa(ioapic_phys);
++ }
++ set_fixmap_nocache(idx, ioapic_phys);
++ printk(KERN_DEBUG "mapped IOAPIC to %08lx (%08lx)\n",
++ __fix_to_virt(idx), ioapic_phys);
++ idx++;
++ }
++}
++#endif
+Index: head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/io_apic_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -45,6 +45,7 @@
+ #include <asm/proto.h>
+ #include <asm/acpi.h>
+ #include <asm/dma.h>
++#include <asm/i8259.h>
+ #include <asm/nmi.h>
+ #include <asm/msidef.h>
+ #include <asm/hypertransport.h>
+@@ -63,10 +64,16 @@ struct irq_cfg {
+ };
+
+ /* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
+-struct irq_cfg irq_cfg[NR_IRQS] __read_mostly;
++static struct irq_cfg irq_cfg[NR_IRQS] __read_mostly;
+
+ static int assign_irq_vector(int irq, cpumask_t mask);
+
++#ifndef CONFIG_XEN
++int first_system_vector = 0xfe;
++
++char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE};
++#endif
++
+ #define __apicdebuginit __init
+
+ int sis_apic_bug; /* not actually supported, dummy for compile */
+@@ -89,14 +96,14 @@ unsigned long io_apic_irqs;
+
+ #define clear_IO_APIC() ((void)0)
+ #else
+-int timer_over_8254 __initdata = 1;
++int timer_through_8259 __initdata;
+
+ /* Where if anywhere is the i8259 connect in external int mode */
+ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
+ #endif
+
+ static DEFINE_SPINLOCK(ioapic_lock);
+-DEFINE_SPINLOCK(vector_lock);
++static DEFINE_SPINLOCK(vector_lock);
+
+ /*
+ * # of IRQ routing registers
+@@ -104,15 +111,17 @@ DEFINE_SPINLOCK(vector_lock);
+ int nr_ioapic_registers[MAX_IO_APICS];
+
+ /* I/O APIC entries */
+-struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
++struct mp_config_ioapic mp_ioapics[MAX_IO_APICS];
+ int nr_ioapics;
+
+ /* MP IRQ source entries */
+-struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
++struct mp_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
+
+ /* # of MP IRQ source entries */
+ int mp_irq_entries;
+
++DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
++
+ /*
+ * Rough estimation of how many shared IRQs there are, can
+ * be changed anytime.
+@@ -141,7 +150,7 @@ struct io_apic {
+ static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx)
+ {
+ return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx)
+- + (mp_ioapics[idx].mpc_apicaddr & ~PAGE_MASK);
++ + (mp_ioapics[idx].mp_apicaddr & ~PAGE_MASK);
+ }
+ #endif
+
+@@ -155,7 +164,7 @@ static inline unsigned int io_apic_read(
+ struct physdev_apic apic_op;
+ int ret;
+
+- apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.apic_physbase = mp_ioapics[apic].mp_apicaddr;
+ apic_op.reg = reg;
+ ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
+ if (ret)
+@@ -173,7 +182,7 @@ static inline void io_apic_write(unsigne
+ #else
+ struct physdev_apic apic_op;
+
+- apic_op.apic_physbase = mp_ioapics[apic].mpc_apicaddr;
++ apic_op.apic_physbase = mp_ioapics[apic].mp_apicaddr;
+ apic_op.reg = reg;
+ apic_op.value = value;
+ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op));
+@@ -209,7 +218,7 @@ static bool io_apic_level_ack_pending(un
+ break;
+ reg = io_apic_read(entry->apic, 0x10 + pin*2);
+ /* Is the remote IRR bit set? */
+- if ((reg >> 14) & 1) {
++ if (reg & IO_APIC_REDIR_REMOTE_IRR) {
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ return true;
+ }
+@@ -308,7 +317,7 @@ static void __target_IO_APIC_irq(unsigne
+ break;
+ io_apic_write(apic, 0x11 + pin*2, dest);
+ reg = io_apic_read(apic, 0x10 + pin*2);
+- reg &= ~0x000000ff;
++ reg &= ~IO_APIC_REDIR_VECTOR_MASK;
+ reg |= vector;
+ io_apic_modify(apic, reg);
+ if (!entry->next)
+@@ -372,6 +381,26 @@ static void add_pin_to_irq(unsigned int
+ }
+
+ #ifndef CONFIG_XEN
++/*
++ * Reroute an IRQ to a different pin.
++ */
++static void __init replace_pin_at_irq(unsigned int irq,
++ int oldapic, int oldpin,
++ int newapic, int newpin)
++{
++ struct irq_pin_list *entry = irq_2_pin + irq;
++
++ while (1) {
++ if (entry->apic == oldapic && entry->pin == oldpin) {
++ entry->apic = newapic;
++ entry->pin = newpin;
++ }
++ if (!entry->next)
++ break;
++ entry = irq_2_pin + entry->next;
++ }
++}
++
+ #define __DO_ACTION(R, ACTION, FINAL) \
+ \
+ { \
+@@ -399,10 +428,11 @@ static void add_pin_to_irq(unsigned int
+ static void name##_IO_APIC_irq (unsigned int irq) \
+ __DO_ACTION(R, ACTION, FINAL)
+
+-DO_ACTION( __mask, 0, |= 0x00010000, io_apic_sync(entry->apic) )
+- /* mask = 1 */
+-DO_ACTION( __unmask, 0, &= 0xfffeffff, )
+- /* mask = 0 */
++/* mask = 1 */
++DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, io_apic_sync(entry->apic))
++
++/* mask = 0 */
++DO_ACTION(__unmask, 0, &= ~IO_APIC_REDIR_MASKED, )
+
+ static void mask_IO_APIC_irq (unsigned int irq)
+ {
+@@ -465,22 +495,6 @@ static int __init disable_timer_pin_setu
+ }
+ __setup("disable_timer_pin_1", disable_timer_pin_setup);
+
+-#ifndef CONFIG_XEN
+-static int __init setup_disable_8254_timer(char *s)
+-{
+- timer_over_8254 = -1;
+- return 1;
+-}
+-static int __init setup_enable_8254_timer(char *s)
+-{
+- timer_over_8254 = 2;
+- return 1;
+-}
+-
+-__setup("disable_8254_timer", setup_disable_8254_timer);
+-__setup("enable_8254_timer", setup_enable_8254_timer);
+-#endif /* !CONFIG_XEN */
+-
+
+ /*
+ * Find the IRQ entry number of a certain pin.
+@@ -490,10 +504,10 @@ static int find_irq_entry(int apic, int
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++)
+- if (mp_irqs[i].mpc_irqtype == type &&
+- (mp_irqs[i].mpc_dstapic == mp_ioapics[apic].mpc_apicid ||
+- mp_irqs[i].mpc_dstapic == MP_APIC_ALL) &&
+- mp_irqs[i].mpc_dstirq == pin)
++ if (mp_irqs[i].mp_irqtype == type &&
++ (mp_irqs[i].mp_dstapic == mp_ioapics[apic].mp_apicid ||
++ mp_irqs[i].mp_dstapic == MP_APIC_ALL) &&
++ mp_irqs[i].mp_dstirq == pin)
+ return i;
+
+ return -1;
+@@ -508,13 +522,13 @@ static int __init find_isa_irq_pin(int i
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++) {
+- int lbus = mp_irqs[i].mpc_srcbus;
++ int lbus = mp_irqs[i].mp_srcbus;
+
+ if (test_bit(lbus, mp_bus_not_pci) &&
+- (mp_irqs[i].mpc_irqtype == type) &&
+- (mp_irqs[i].mpc_srcbusirq == irq))
++ (mp_irqs[i].mp_irqtype == type) &&
++ (mp_irqs[i].mp_srcbusirq == irq))
+
+- return mp_irqs[i].mpc_dstirq;
++ return mp_irqs[i].mp_dstirq;
+ }
+ return -1;
+ }
+@@ -524,17 +538,17 @@ static int __init find_isa_irq_apic(int
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++) {
+- int lbus = mp_irqs[i].mpc_srcbus;
++ int lbus = mp_irqs[i].mp_srcbus;
+
+ if (test_bit(lbus, mp_bus_not_pci) &&
+- (mp_irqs[i].mpc_irqtype == type) &&
+- (mp_irqs[i].mpc_srcbusirq == irq))
++ (mp_irqs[i].mp_irqtype == type) &&
++ (mp_irqs[i].mp_srcbusirq == irq))
+ break;
+ }
+ if (i < mp_irq_entries) {
+ int apic;
+ for(apic = 0; apic < nr_ioapics; apic++) {
+- if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic)
++ if (mp_ioapics[apic].mp_apicid == mp_irqs[i].mp_dstapic)
+ return apic;
+ }
+ }
+@@ -555,28 +569,28 @@ int IO_APIC_get_PCI_irq_vector(int bus,
+
+ apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n",
+ bus, slot, pin);
+- if (mp_bus_id_to_pci_bus[bus] == -1) {
++ if (test_bit(bus, mp_bus_not_pci)) {
+ apic_printk(APIC_VERBOSE, "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
+ return -1;
+ }
+ for (i = 0; i < mp_irq_entries; i++) {
+- int lbus = mp_irqs[i].mpc_srcbus;
++ int lbus = mp_irqs[i].mp_srcbus;
+
+ for (apic = 0; apic < nr_ioapics; apic++)
+- if (mp_ioapics[apic].mpc_apicid == mp_irqs[i].mpc_dstapic ||
+- mp_irqs[i].mpc_dstapic == MP_APIC_ALL)
++ if (mp_ioapics[apic].mp_apicid == mp_irqs[i].mp_dstapic ||
++ mp_irqs[i].mp_dstapic == MP_APIC_ALL)
+ break;
+
+ if (!test_bit(lbus, mp_bus_not_pci) &&
+- !mp_irqs[i].mpc_irqtype &&
++ !mp_irqs[i].mp_irqtype &&
+ (bus == lbus) &&
+- (slot == ((mp_irqs[i].mpc_srcbusirq >> 2) & 0x1f))) {
+- int irq = pin_2_irq(i,apic,mp_irqs[i].mpc_dstirq);
++ (slot == ((mp_irqs[i].mp_srcbusirq >> 2) & 0x1f))) {
++ int irq = pin_2_irq(i,apic,mp_irqs[i].mp_dstirq);
+
+ if (!(apic || IO_APIC_IRQ(irq)))
+ continue;
+
+- if (pin == (mp_irqs[i].mpc_srcbusirq & 3))
++ if (pin == (mp_irqs[i].mp_srcbusirq & 3))
+ return irq;
+ /*
+ * Use the first all-but-pin matching entry as a
+@@ -604,13 +618,13 @@ int IO_APIC_get_PCI_irq_vector(int bus,
+
+ static int MPBIOS_polarity(int idx)
+ {
+- int bus = mp_irqs[idx].mpc_srcbus;
++ int bus = mp_irqs[idx].mp_srcbus;
+ int polarity;
+
+ /*
+ * Determine IRQ line polarity (high active or low active):
+ */
+- switch (mp_irqs[idx].mpc_irqflag & 3)
++ switch (mp_irqs[idx].mp_irqflag & 3)
+ {
+ case 0: /* conforms, ie. bus-type dependent polarity */
+ if (test_bit(bus, mp_bus_not_pci))
+@@ -646,13 +660,13 @@ static int MPBIOS_polarity(int idx)
+
+ static int MPBIOS_trigger(int idx)
+ {
+- int bus = mp_irqs[idx].mpc_srcbus;
++ int bus = mp_irqs[idx].mp_srcbus;
+ int trigger;
+
+ /*
+ * Determine IRQ trigger mode (edge or level sensitive):
+ */
+- switch ((mp_irqs[idx].mpc_irqflag>>2) & 3)
++ switch ((mp_irqs[idx].mp_irqflag>>2) & 3)
+ {
+ case 0: /* conforms, ie. bus-type dependent */
+ if (test_bit(bus, mp_bus_not_pci))
+@@ -699,16 +713,16 @@ static inline int irq_trigger(int idx)
+ static int pin_2_irq(int idx, int apic, int pin)
+ {
+ int irq, i;
+- int bus = mp_irqs[idx].mpc_srcbus;
++ int bus = mp_irqs[idx].mp_srcbus;
+
+ /*
+ * Debugging check, we are in big trouble if this message pops up!
+ */
+- if (mp_irqs[idx].mpc_dstirq != pin)
++ if (mp_irqs[idx].mp_dstirq != pin)
+ printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n");
+
+ if (test_bit(bus, mp_bus_not_pci)) {
+- irq = mp_irqs[idx].mpc_srcbusirq;
++ irq = mp_irqs[idx].mp_srcbusirq;
+ } else {
+ /*
+ * PCI IRQs are mapped in order
+@@ -722,6 +736,19 @@ static int pin_2_irq(int idx, int apic,
+ return irq;
+ }
+
++void lock_vector_lock(void)
++{
++ /* Used to the online set of cpus does not change
++ * during assign_irq_vector.
++ */
++ spin_lock(&vector_lock);
++}
++
++void unlock_vector_lock(void)
++{
++ spin_unlock(&vector_lock);
++}
++
+ static int __assign_irq_vector(int irq, cpumask_t mask)
+ {
+ struct physdev_irq irq_op;
+@@ -773,7 +800,7 @@ static void __clear_irq_vector(int irq)
+
+ vector = cfg->vector;
+ cpus_and(mask, cfg->domain, cpu_online_map);
+- for_each_cpu_mask(cpu, mask)
++ for_each_cpu_mask_nr(cpu, mask)
+ per_cpu(vector_irq, cpu)[vector] = -1;
+
+ cfg->vector = 0;
+@@ -842,7 +869,7 @@ static void setup_IO_APIC_irq(int apic,
+ apic_printk(APIC_VERBOSE,KERN_DEBUG
+ "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> "
+ "IRQ %d Mode:%i Active:%i)\n",
+- apic, mp_ioapics[apic].mpc_apicid, pin, cfg->vector,
++ apic, mp_ioapics[apic].mp_apicid, pin, cfg->vector,
+ irq, trigger, polarity);
+
+ /*
+@@ -883,10 +910,10 @@ static void __init setup_IO_APIC_irqs(vo
+ idx = find_irq_entry(apic,pin,mp_INT);
+ if (idx == -1) {
+ if (first_notcon) {
+- apic_printk(APIC_VERBOSE, KERN_DEBUG " IO-APIC (apicid-pin) %d-%d", mp_ioapics[apic].mpc_apicid, pin);
++ apic_printk(APIC_VERBOSE, KERN_DEBUG " IO-APIC (apicid-pin) %d-%d", mp_ioapics[apic].mp_apicid, pin);
+ first_notcon = 0;
+ } else
+- apic_printk(APIC_VERBOSE, ", %d-%d", mp_ioapics[apic].mpc_apicid, pin);
++ apic_printk(APIC_VERBOSE, ", %d-%d", mp_ioapics[apic].mp_apicid, pin);
+ continue;
+ }
+ if (!first_notcon) {
+@@ -908,26 +935,21 @@ static void __init setup_IO_APIC_irqs(vo
+
+ #ifndef CONFIG_XEN
+ /*
+- * Set up the 8259A-master output pin as broadcast to all
+- * CPUs.
++ * Set up the timer pin, possibly with the 8259A-master behind.
+ */
+-static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, int vector)
++static void __init setup_timer_IRQ0_pin(unsigned int apic, unsigned int pin,
++ int vector)
+ {
+ struct IO_APIC_route_entry entry;
+
+ memset(&entry, 0, sizeof(entry));
+
+- disable_8259A_irq(0);
+-
+- /* mask LVT0 */
+- apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
+-
+ /*
+ * We use logical delivery to get the timer IRQ
+ * to the first CPU.
+ */
+ entry.dest_mode = INT_DEST_MODE;
+- entry.mask = 0; /* unmask IRQ now */
++ entry.mask = 1; /* mask IRQ now */
+ entry.dest = cpu_mask_to_apicid(TARGET_CPUS);
+ entry.delivery_mode = INT_DELIVERY_MODE;
+ entry.polarity = 0;
+@@ -936,7 +958,7 @@ static void __init setup_ExtINT_IRQ0_pin
+
+ /*
+ * The timer IRQ doesn't have to know that behind the
+- * scene we have a 8259A-master in AEOI mode ...
++ * scene we may have a 8259A-master in AEOI mode ...
+ */
+ set_irq_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, "edge");
+
+@@ -944,8 +966,6 @@ static void __init setup_ExtINT_IRQ0_pin
+ * Add it to the IO-APIC irq-routing table:
+ */
+ ioapic_write_entry(apic, pin, entry);
+-
+- enable_8259A_irq(0);
+ }
+
+ void __apicdebuginit print_IO_APIC(void)
+@@ -962,7 +982,7 @@ void __apicdebuginit print_IO_APIC(void)
+ printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
+ for (i = 0; i < nr_ioapics; i++)
+ printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n",
+- mp_ioapics[i].mpc_apicid, nr_ioapic_registers[i]);
++ mp_ioapics[i].mp_apicid, nr_ioapic_registers[i]);
+
+ /*
+ * We are a bit conservative about what we expect. We have to
+@@ -980,7 +1000,7 @@ void __apicdebuginit print_IO_APIC(void)
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ printk("\n");
+- printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mpc_apicid);
++ printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mp_apicid);
+ printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw);
+ printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID);
+
+@@ -1072,6 +1092,7 @@ void __apicdebuginit print_local_APIC(vo
+
+ printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
+ smp_processor_id(), hard_smp_processor_id());
++ v = apic_read(APIC_ID);
+ printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, GET_APIC_ID(read_apic_id()));
+ v = apic_read(APIC_LVR);
+ printk(KERN_INFO "... APIC VERSION: %08x\n", v);
+@@ -1141,7 +1162,7 @@ void __apicdebuginit print_local_APIC(vo
+
+ void print_all_local_APICs (void)
+ {
+- on_each_cpu(print_local_APIC, NULL, 1, 1);
++ on_each_cpu(print_local_APIC, NULL, 1);
+ }
+
+ void __apicdebuginit print_PIC(void)
+@@ -1175,6 +1196,8 @@ void __apicdebuginit print_PIC(void)
+ v = inb(0x4d1) << 8 | inb(0x4d0);
+ printk(KERN_DEBUG "... PIC ELCR: %04x\n", v);
+ }
++#else
++void __apicdebuginit print_IO_APIC(void) {}
+ #endif /* !CONFIG_XEN */
+
+ void __init enable_IO_APIC(void)
+@@ -1359,12 +1382,10 @@ static unsigned int startup_ioapic_irq(u
+ static int ioapic_retrigger_irq(unsigned int irq)
+ {
+ struct irq_cfg *cfg = &irq_cfg[irq];
+- cpumask_t mask;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vector_lock, flags);
+- mask = cpumask_of_cpu(first_cpu(cfg->domain));
+- send_IPI_mask(mask, cfg->vector);
++ send_IPI_mask(cpumask_of_cpu(first_cpu(cfg->domain)), cfg->vector);
+ spin_unlock_irqrestore(&vector_lock, flags);
+
+ return 1;
+@@ -1545,7 +1566,7 @@ static inline void init_IO_APIC_traps(vo
+ }
+
+ #ifndef CONFIG_XEN
+-static void enable_lapic_irq (unsigned int irq)
++static void unmask_lapic_irq(unsigned int irq)
+ {
+ unsigned long v;
+
+@@ -1553,7 +1574,7 @@ static void enable_lapic_irq (unsigned i
+ apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
+ }
+
+-static void disable_lapic_irq (unsigned int irq)
++static void mask_lapic_irq(unsigned int irq)
+ {
+ unsigned long v;
+
+@@ -1566,19 +1587,20 @@ static void ack_lapic_irq (unsigned int
+ ack_APIC_irq();
+ }
+
+-static void end_lapic_irq (unsigned int i) { /* nothing */ }
+-
+-static struct hw_interrupt_type lapic_irq_type __read_mostly = {
+- .name = "local-APIC",
+- .typename = "local-APIC-edge",
+- .startup = NULL, /* startup_irq() not used for IRQ0 */
+- .shutdown = NULL, /* shutdown_irq() not used for IRQ0 */
+- .enable = enable_lapic_irq,
+- .disable = disable_lapic_irq,
+- .ack = ack_lapic_irq,
+- .end = end_lapic_irq,
++static struct irq_chip lapic_chip __read_mostly = {
++ .name = "local-APIC",
++ .mask = mask_lapic_irq,
++ .unmask = unmask_lapic_irq,
++ .ack = ack_lapic_irq,
+ };
+
++static void lapic_register_intr(int irq)
++{
++ irq_desc[irq].status &= ~IRQ_LEVEL;
++ set_irq_chip_and_handler_name(irq, &lapic_chip, handle_edge_irq,
++ "edge");
++}
++
+ static void __init setup_nmi(void)
+ {
+ /*
+@@ -1664,6 +1686,7 @@ static inline void __init check_timer(vo
+ struct irq_cfg *cfg = irq_cfg + 0;
+ int apic1, pin1, apic2, pin2;
+ unsigned long flags;
++ int no_pin1 = 0;
+
+ local_irq_save(flags);
+
+@@ -1674,34 +1697,48 @@ static inline void __init check_timer(vo
+ assign_irq_vector(0, TARGET_CPUS);
+
+ /*
+- * Subtle, code in do_timer_interrupt() expects an AEOI
+- * mode for the 8259A whenever interrupts are routed
+- * through I/O APICs. Also IRQ0 has to be enabled in
+- * the 8259A which implies the virtual wire has to be
+- * disabled in the local APIC.
++ * As IRQ0 is to be enabled in the 8259A, the virtual
++ * wire has to be disabled in the local APIC.
+ */
+ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
+ init_8259A(1);
+- if (timer_over_8254 > 0)
+- enable_8259A_irq(0);
+
+ pin1 = find_isa_irq_pin(0, mp_INT);
+ apic1 = find_isa_irq_apic(0, mp_INT);
+ pin2 = ioapic_i8259.pin;
+ apic2 = ioapic_i8259.apic;
+
+- apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
+- cfg->vector, apic1, pin1, apic2, pin2);
++ apic_printk(APIC_QUIET, KERN_INFO "..TIMER: vector=0x%02X "
++ "apic1=%d pin1=%d apic2=%d pin2=%d\n",
++ cfg->vector, apic1, pin1, apic2, pin2);
++
++ /*
++ * Some BIOS writers are clueless and report the ExtINTA
++ * I/O APIC input from the cascaded 8259A as the timer
++ * interrupt input. So just in case, if only one pin
++ * was found above, try it both directly and through the
++ * 8259A.
++ */
++ if (pin1 == -1) {
++ pin1 = pin2;
++ apic1 = apic2;
++ no_pin1 = 1;
++ } else if (pin2 == -1) {
++ pin2 = pin1;
++ apic2 = apic1;
++ }
+
+ if (pin1 != -1) {
+ /*
+ * Ok, does IRQ0 through the IOAPIC work?
+ */
++ if (no_pin1) {
++ add_pin_to_irq(0, apic1, pin1);
++ setup_timer_IRQ0_pin(apic1, pin1, cfg->vector);
++ }
+ unmask_IO_APIC_irq(0);
+ if (!no_timer_check && timer_irq_works()) {
+- nmi_watchdog_default();
+ if (nmi_watchdog == NMI_IO_APIC) {
+- disable_8259A_irq(0);
+ setup_nmi();
+ enable_8259A_irq(0);
+ }
+@@ -1710,54 +1747,62 @@ static inline void __init check_timer(vo
+ goto out;
+ }
+ clear_IO_APIC_pin(apic1, pin1);
+- apic_printk(APIC_QUIET,KERN_ERR "..MP-BIOS bug: 8254 timer not "
+- "connected to IO-APIC\n");
+- }
+-
+- apic_printk(APIC_VERBOSE,KERN_INFO "...trying to set up timer (IRQ0) "
+- "through the 8259A ... ");
+- if (pin2 != -1) {
+- apic_printk(APIC_VERBOSE,"\n..... (found apic %d pin %d) ...",
+- apic2, pin2);
++ if (!no_pin1)
++ apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: "
++ "8254 timer not connected to IO-APIC\n");
++
++ apic_printk(APIC_QUIET, KERN_INFO "...trying to set up timer "
++ "(IRQ0) through the 8259A ...\n");
++ apic_printk(APIC_QUIET, KERN_INFO
++ "..... (found apic %d pin %d) ...\n", apic2, pin2);
+ /*
+ * legacy devices should be connected to IO APIC #0
+ */
+- setup_ExtINT_IRQ0_pin(apic2, pin2, cfg->vector);
++ replace_pin_at_irq(0, apic1, pin1, apic2, pin2);
++ setup_timer_IRQ0_pin(apic2, pin2, cfg->vector);
++ unmask_IO_APIC_irq(0);
++ enable_8259A_irq(0);
+ if (timer_irq_works()) {
+- apic_printk(APIC_VERBOSE," works.\n");
+- nmi_watchdog_default();
++ apic_printk(APIC_QUIET, KERN_INFO "....... works.\n");
++ timer_through_8259 = 1;
+ if (nmi_watchdog == NMI_IO_APIC) {
++ disable_8259A_irq(0);
+ setup_nmi();
++ enable_8259A_irq(0);
+ }
+ goto out;
+ }
+ /*
+ * Cleanup, just in case ...
+ */
++ disable_8259A_irq(0);
+ clear_IO_APIC_pin(apic2, pin2);
++ apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n");
+ }
+- apic_printk(APIC_VERBOSE," failed.\n");
+
+ if (nmi_watchdog == NMI_IO_APIC) {
+- printk(KERN_WARNING "timer doesn't work through the IO-APIC - disabling NMI Watchdog!\n");
+- nmi_watchdog = 0;
++ apic_printk(APIC_QUIET, KERN_WARNING "timer doesn't work "
++ "through the IO-APIC - disabling NMI Watchdog!\n");
++ nmi_watchdog = NMI_NONE;
+ }
+
+- apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as Virtual Wire IRQ...");
++ apic_printk(APIC_QUIET, KERN_INFO
++ "...trying to set up timer as Virtual Wire IRQ...\n");
+
+- disable_8259A_irq(0);
+- irq_desc[0].chip = &lapic_irq_type;
++ lapic_register_intr(0);
+ apic_write(APIC_LVT0, APIC_DM_FIXED | cfg->vector); /* Fixed mode */
+ enable_8259A_irq(0);
+
+ if (timer_irq_works()) {
+- apic_printk(APIC_VERBOSE," works.\n");
++ apic_printk(APIC_QUIET, KERN_INFO "..... works.\n");
+ goto out;
+ }
++ disable_8259A_irq(0);
+ apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector);
+- apic_printk(APIC_VERBOSE," failed.\n");
++ apic_printk(APIC_QUIET, KERN_INFO "..... failed.\n");
+
+- apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as ExtINT IRQ...");
++ apic_printk(APIC_QUIET, KERN_INFO
++ "...trying to set up timer as ExtINT IRQ...\n");
+
+ init_8259A(0);
+ make_8259A_irq(0);
+@@ -1766,11 +1811,12 @@ static inline void __init check_timer(vo
+ unlock_ExtINT_logic();
+
+ if (timer_irq_works()) {
+- apic_printk(APIC_VERBOSE," works.\n");
++ apic_printk(APIC_QUIET, KERN_INFO "..... works.\n");
+ goto out;
+ }
+- apic_printk(APIC_VERBOSE," failed :(.\n");
+- panic("IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter\n");
++ apic_printk(APIC_QUIET, KERN_INFO "..... failed :(.\n");
++ panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a "
++ "report. Then try booting with the 'noapic' option.\n");
+ out:
+ local_irq_restore(flags);
+ }
+@@ -1788,10 +1834,21 @@ __setup("no_timer_check", notimercheck);
+
+ /*
+ *
+- * IRQs that are handled by the PIC in the MPS IOAPIC case.
+- * - IRQ2 is the cascade IRQ, and cannot be a io-apic IRQ.
+- * Linux doesn't really care, as it's not actually used
+- * for any interrupt handling anyway.
++ * Traditionally ISA IRQ2 is the cascade IRQ, and is not available
++ * to devices. However there may be an I/O APIC pin available for
++ * this interrupt regardless. The pin may be left unconnected, but
++ * typically it will be reused as an ExtINT cascade interrupt for
++ * the master 8259A. In the MPS case such a pin will normally be
++ * reported as an ExtINT interrupt in the MP table. With ACPI
++ * there is no provision for ExtINT interrupts, and in the absence
++ * of an override it would be treated as an ordinary ISA I/O APIC
++ * interrupt, that is edge-triggered and unmasked by default. We
++ * used to do this, but it caused problems on some systems because
++ * of the NMI watchdog and sometimes IRQ0 of the 8254 timer using
++ * the same ExtINT cascade interrupt to drive the local APIC of the
++ * bootstrap processor. Therefore we refrain from routing IRQ2 to
++ * the I/O APIC in all cases now. No actual device should request
++ * it anyway. --macro
+ */
+ #define PIC_IRQS (1<<2)
+
+@@ -1799,10 +1856,7 @@ void __init setup_IO_APIC(void)
+ {
+ enable_IO_APIC();
+
+- if (acpi_ioapic)
+- io_apic_irqs = ~0; /* all IRQs go through IOAPIC */
+- else
+- io_apic_irqs = ~PIC_IRQS;
++ io_apic_irqs = ~PIC_IRQS;
+
+ apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
+
+@@ -1851,8 +1905,8 @@ static int ioapic_resume(struct sys_devi
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(dev->id, 0);
+- if (reg_00.bits.ID != mp_ioapics[dev->id].mpc_apicid) {
+- reg_00.bits.ID = mp_ioapics[dev->id].mpc_apicid;
++ if (reg_00.bits.ID != mp_ioapics[dev->id].mp_apicid) {
++ reg_00.bits.ID = mp_ioapics[dev->id].mp_apicid;
+ io_apic_write(dev->id, 0, reg_00.raw);
+ }
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+@@ -2254,8 +2308,8 @@ int acpi_get_override_irq(int bus_irq, i
+ return -1;
+
+ for (i = 0; i < mp_irq_entries; i++)
+- if (mp_irqs[i].mpc_irqtype == mp_INT &&
+- mp_irqs[i].mpc_srcbusirq == bus_irq)
++ if (mp_irqs[i].mp_irqtype == mp_INT &&
++ mp_irqs[i].mp_srcbusirq == bus_irq)
+ break;
+ if (i >= mp_irq_entries)
+ return -1;
+@@ -2349,7 +2403,7 @@ void __init ioapic_init_mappings(void)
+ ioapic_res = ioapic_setup_resources();
+ for (i = 0; i < nr_ioapics; i++) {
+ if (smp_found_config) {
+- ioapic_phys = mp_ioapics[i].mpc_apicaddr;
++ ioapic_phys = mp_ioapics[i].mp_apicaddr;
+ } else {
+ ioapic_phys = (unsigned long)
+ alloc_bootmem_pages(PAGE_SIZE);
+Index: head-2008-12-01/arch/x86/kernel/ipi-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ipi-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ipi-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -8,7 +8,6 @@
+ #include <linux/kernel_stat.h>
+ #include <linux/mc146818rtc.h>
+ #include <linux/cache.h>
+-#include <linux/interrupt.h>
+ #include <linux/cpu.h>
+ #include <linux/module.h>
+
+@@ -85,7 +84,7 @@ void __send_IPI_shortcut(unsigned int sh
+ /*
+ * Send the IPI. The write to APIC_ICR fires this off.
+ */
+- apic_write_around(APIC_ICR, cfg);
++ apic_write(APIC_ICR, cfg);
+ #else
+ int cpu;
+
+@@ -132,7 +131,7 @@ static inline void __send_IPI_dest_field
+ * prepare target chip field
+ */
+ cfg = __prepare_ICR2(mask);
+- apic_write_around(APIC_ICR2, cfg);
++ apic_write(APIC_ICR2, cfg);
+
+ /*
+ * program the ICR
+@@ -142,7 +141,7 @@ static inline void __send_IPI_dest_field
+ /*
+ * Send the IPI. The write to APIC_ICR fires this off.
+ */
+- apic_write_around(APIC_ICR, cfg);
++ apic_write(APIC_ICR, cfg);
+ }
+ #endif
+
+Index: head-2008-12-01/arch/x86/kernel/irq_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_32-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -48,6 +48,29 @@ void ack_bad_irq(unsigned int irq)
+ #endif
+ }
+
++#ifdef CONFIG_DEBUG_STACKOVERFLOW
++/* Debugging check for stack overflow: is there less than 1KB free? */
++static int check_stack_overflow(void)
++{
++ long sp;
++
++ __asm__ __volatile__("andl %%esp,%0" :
++ "=r" (sp) : "0" (THREAD_SIZE - 1));
++
++ return sp < (sizeof(struct thread_info) + STACK_WARN);
++}
++
++static void print_stack_overflow(void)
++{
++ printk(KERN_WARNING "low stack detected by irq handler\n");
++ dump_stack();
++}
++
++#else
++static inline int check_stack_overflow(void) { return 0; }
++static inline void print_stack_overflow(void) { }
++#endif
++
+ #ifdef CONFIG_4KSTACKS
+ /*
+ * per-CPU IRQ handling contexts (thread information and stack)
+@@ -59,48 +82,26 @@ union irq_ctx {
+
+ static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly;
+ static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
+-#endif
+-
+-/*
+- * do_IRQ handles all normal device IRQ's (the special
+- * SMP cross-CPU interrupts have their own specific
+- * handlers).
+- */
+-unsigned int do_IRQ(struct pt_regs *regs)
+-{
+- struct pt_regs *old_regs;
+- /* high bit used in ret_from_ code */
+- int irq = ~regs->orig_ax;
+- struct irq_desc *desc = irq_desc + irq;
+-#ifdef CONFIG_4KSTACKS
+- union irq_ctx *curctx, *irqctx;
+- u32 *isp;
+-#endif
+
+- if (unlikely((unsigned)irq >= NR_IRQS)) {
+- printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
+- __func__, irq);
+- BUG();
+- }
++static char softirq_stack[NR_CPUS * THREAD_SIZE] __page_aligned_bss;
++static char hardirq_stack[NR_CPUS * THREAD_SIZE] __page_aligned_bss;
+
+- old_regs = set_irq_regs(regs);
+- /*irq_enter();*/
+-#ifdef CONFIG_DEBUG_STACKOVERFLOW
+- /* Debugging check for stack overflow: is there less than 1KB free? */
+- {
+- long sp;
+-
+- __asm__ __volatile__("andl %%esp,%0" :
+- "=r" (sp) : "0" (THREAD_SIZE - 1));
+- if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
+- printk("do_IRQ: stack overflow: %ld\n",
+- sp - sizeof(struct thread_info));
+- dump_stack();
+- }
+- }
+-#endif
++static void call_on_stack(void *func, void *stack)
++{
++ asm volatile("xchgl %%ebx,%%esp \n"
++ "call *%%edi \n"
++ "movl %%ebx,%%esp \n"
++ : "=b" (stack)
++ : "0" (stack),
++ "D"(func)
++ : "memory", "cc", "edx", "ecx", "eax");
++}
+
+-#ifdef CONFIG_4KSTACKS
++static inline int
++execute_on_irq_stack(int overflow, struct irq_desc *desc, int irq)
++{
++ union irq_ctx *curctx, *irqctx;
++ u32 *isp, arg1, arg2;
+
+ curctx = (union irq_ctx *) current_thread_info();
+ irqctx = hardirq_ctx[smp_processor_id()];
+@@ -111,52 +112,39 @@ unsigned int do_IRQ(struct pt_regs *regs
+ * handler) we can't do that and just have to keep using the
+ * current stack (which is the irq stack already after all)
+ */
+- if (curctx != irqctx) {
+- int arg1, arg2, bx;
+-
+- /* build the stack frame on the IRQ stack */
+- isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
+- irqctx->tinfo.task = curctx->tinfo.task;
+- irqctx->tinfo.previous_esp = current_stack_pointer;
++ if (unlikely(curctx == irqctx))
++ return 0;
+
+- /*
+- * Copy the softirq bits in preempt_count so that the
+- * softirq checks work in the hardirq context.
+- */
+- irqctx->tinfo.preempt_count =
+- (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) |
+- (curctx->tinfo.preempt_count & SOFTIRQ_MASK);
+-
+- asm volatile(
+- " xchgl %%ebx,%%esp \n"
+- " call *%%edi \n"
+- " movl %%ebx,%%esp \n"
+- : "=a" (arg1), "=d" (arg2), "=b" (bx)
+- : "0" (irq), "1" (desc), "2" (isp),
+- "D" (desc->handle_irq)
+- : "memory", "cc", "ecx"
+- );
+- } else
+-#endif
+- desc->handle_irq(irq, desc);
++ /* build the stack frame on the IRQ stack */
++ isp = (u32 *) ((char*)irqctx + sizeof(*irqctx));
++ irqctx->tinfo.task = curctx->tinfo.task;
++ irqctx->tinfo.previous_esp = current_stack_pointer;
+
+- /*irq_exit();*/
+- set_irq_regs(old_regs);
++ /*
++ * Copy the softirq bits in preempt_count so that the
++ * softirq checks work in the hardirq context.
++ */
++ irqctx->tinfo.preempt_count =
++ (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) |
++ (curctx->tinfo.preempt_count & SOFTIRQ_MASK);
++
++ if (unlikely(overflow))
++ call_on_stack(print_stack_overflow, isp);
++
++ asm volatile("xchgl %%ebx,%%esp \n"
++ "call *%%edi \n"
++ "movl %%ebx,%%esp \n"
++ : "=a" (arg1), "=d" (arg2), "=b" (isp)
++ : "0" (irq), "1" (desc), "2" (isp),
++ "D" (desc->handle_irq)
++ : "memory", "cc", "ecx");
+ return 1;
+ }
+
+-#ifdef CONFIG_4KSTACKS
+-
+-static char softirq_stack[NR_CPUS * THREAD_SIZE]
+- __attribute__((__section__(".bss.page_aligned")));
+-
+-static char hardirq_stack[NR_CPUS * THREAD_SIZE]
+- __attribute__((__section__(".bss.page_aligned")));
+-
+ /*
+ * allocate per-cpu stacks for hardirq and for softirq processing
+ */
+-void irq_ctx_init(int cpu)
++void __cpuinit irq_ctx_init(int cpu)
+ {
+ union irq_ctx *irqctx;
+
+@@ -164,25 +152,25 @@ void irq_ctx_init(int cpu)
+ return;
+
+ irqctx = (union irq_ctx*) &hardirq_stack[cpu*THREAD_SIZE];
+- irqctx->tinfo.task = NULL;
+- irqctx->tinfo.exec_domain = NULL;
+- irqctx->tinfo.cpu = cpu;
+- irqctx->tinfo.preempt_count = HARDIRQ_OFFSET;
+- irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);
++ irqctx->tinfo.task = NULL;
++ irqctx->tinfo.exec_domain = NULL;
++ irqctx->tinfo.cpu = cpu;
++ irqctx->tinfo.preempt_count = HARDIRQ_OFFSET;
++ irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);
+
+ hardirq_ctx[cpu] = irqctx;
+
+ irqctx = (union irq_ctx*) &softirq_stack[cpu*THREAD_SIZE];
+- irqctx->tinfo.task = NULL;
+- irqctx->tinfo.exec_domain = NULL;
+- irqctx->tinfo.cpu = cpu;
+- irqctx->tinfo.preempt_count = 0;
+- irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);
++ irqctx->tinfo.task = NULL;
++ irqctx->tinfo.exec_domain = NULL;
++ irqctx->tinfo.cpu = cpu;
++ irqctx->tinfo.preempt_count = 0;
++ irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);
+
+ softirq_ctx[cpu] = irqctx;
+
+- printk("CPU %u irqstacks, hard=%p soft=%p\n",
+- cpu,hardirq_ctx[cpu],softirq_ctx[cpu]);
++ printk(KERN_DEBUG "CPU %u irqstacks, hard=%p soft=%p\n",
++ cpu,hardirq_ctx[cpu],softirq_ctx[cpu]);
+ }
+
+ void irq_ctx_exit(int cpu)
+@@ -211,25 +199,56 @@ asmlinkage void do_softirq(void)
+ /* build the stack frame on the softirq stack */
+ isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
+
+- asm volatile(
+- " xchgl %%ebx,%%esp \n"
+- " call __do_softirq \n"
+- " movl %%ebx,%%esp \n"
+- : "=b"(isp)
+- : "0"(isp)
+- : "memory", "cc", "edx", "ecx", "eax"
+- );
++ call_on_stack(__do_softirq, isp);
+ /*
+ * Shouldnt happen, we returned above if in_interrupt():
+- */
++ */
+ WARN_ON_ONCE(softirq_count());
+ }
+
+ local_irq_restore(flags);
+ }
++
++#else
++static inline int
++execute_on_irq_stack(int overflow, struct irq_desc *desc, int irq) { return 0; }
+ #endif
+
+ /*
++ * do_IRQ handles all normal device IRQ's (the special
++ * SMP cross-CPU interrupts have their own specific
++ * handlers).
++ */
++unsigned int do_IRQ(struct pt_regs *regs)
++{
++ struct pt_regs *old_regs;
++ /* high bit used in ret_from_ code */
++ int overflow, irq = ~regs->orig_ax;
++ struct irq_desc *desc = irq_desc + irq;
++
++ if (unlikely((unsigned)irq >= NR_IRQS)) {
++ printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
++ __func__, irq);
++ BUG();
++ }
++
++ old_regs = set_irq_regs(regs);
++ /*irq_enter();*/
++
++ overflow = check_stack_overflow();
++
++ if (!execute_on_irq_stack(overflow, desc, irq)) {
++ if (unlikely(overflow))
++ print_stack_overflow();
++ desc->handle_irq(irq, desc);
++ }
++
++ /*irq_exit();*/
++ set_irq_regs(old_regs);
++ return 1;
++}
++
++/*
+ * Interrupt statistics:
+ */
+
+@@ -337,6 +356,42 @@ skip:
+ return 0;
+ }
+
++/*
++ * /proc/stat helpers
++ */
++u64 arch_irq_stat_cpu(unsigned int cpu)
++{
++ u64 sum = nmi_count(cpu);
++
++#ifdef CONFIG_X86_LOCAL_APIC
++ sum += per_cpu(irq_stat, cpu).apic_timer_irqs;
++#endif
++#ifdef CONFIG_SMP
++ sum += per_cpu(irq_stat, cpu).irq_resched_count;
++ sum += per_cpu(irq_stat, cpu).irq_call_count;
++#ifndef CONFIG_XEN
++ sum += per_cpu(irq_stat, cpu).irq_tlb_count;
++#endif
++#endif
++#ifdef CONFIG_X86_MCE
++ sum += per_cpu(irq_stat, cpu).irq_thermal_count;
++#endif
++#ifdef CONFIG_X86_LOCAL_APIC
++ sum += per_cpu(irq_stat, cpu).irq_spurious_count;
++#endif
++ return sum;
++}
++
++u64 arch_irq_stat(void)
++{
++ u64 sum = atomic_read(&irq_err_count);
++
++#ifdef CONFIG_X86_IO_APIC
++ sum += atomic_read(&irq_mis_count);
++#endif
++ return sum;
++}
++
+ #ifdef CONFIG_HOTPLUG_CPU
+
+ void fixup_irqs(cpumask_t map)
+Index: head-2008-12-01/arch/x86/kernel/irq_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_64-xen.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -163,6 +163,34 @@ skip:
+ }
+
+ /*
++ * /proc/stat helpers
++ */
++u64 arch_irq_stat_cpu(unsigned int cpu)
++{
++ u64 sum = cpu_pda(cpu)->__nmi_count;
++
++ sum += cpu_pda(cpu)->apic_timer_irqs;
++#ifdef CONFIG_SMP
++ sum += cpu_pda(cpu)->irq_resched_count;
++ sum += cpu_pda(cpu)->irq_call_count;
++#ifndef CONFIG_XEN
++ sum += cpu_pda(cpu)->irq_tlb_count;
++#endif
++#endif
++#ifdef CONFIG_X86_MCE
++ sum += cpu_pda(cpu)->irq_thermal_count;
++ sum += cpu_pda(cpu)->irq_threshold_count;
++#endif
++ sum += cpu_pda(cpu)->irq_spurious_count;
++ return sum;
++}
++
++u64 arch_irq_stat(void)
++{
++ return atomic_read(&irq_err_count);
++}
++
++/*
+ * do_IRQ handles all normal device IRQ's (the special
+ * SMP cross-CPU interrupts have their own specific
+ * handlers).
+Index: head-2008-12-01/arch/x86/kernel/ldt-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ldt-xen.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ldt-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -20,9 +20,9 @@
+ #include <asm/mmu_context.h>
+
+ #ifdef CONFIG_SMP
+-static void flush_ldt(void *null)
++static void flush_ldt(void *current_mm)
+ {
+- if (current->active_mm)
++ if (current->active_mm == current_mm)
+ load_LDT(¤t->active_mm->context);
+ }
+ #endif
+@@ -62,8 +62,6 @@ static int alloc_ldt(mm_context_t *pc, i
+
+ if (reload) {
+ #ifdef CONFIG_SMP
+- cpumask_t mask;
+-
+ preempt_disable();
+ #endif
+ make_pages_readonly(newldt,
+@@ -71,9 +69,9 @@ static int alloc_ldt(mm_context_t *pc, i
+ XENFEAT_writable_descriptor_tables);
+ load_LDT(pc);
+ #ifdef CONFIG_SMP
+- mask = cpumask_of_cpu(smp_processor_id());
+- if (!cpus_equal(current->mm->cpu_vm_mask, mask))
+- smp_call_function(flush_ldt, NULL, 1, 1);
++ if (!cpus_equal(current->mm->cpu_vm_mask,
++ cpumask_of_cpu(smp_processor_id())))
++ smp_call_function(flush_ldt, current->mm, 1);
+ preempt_enable();
+ #endif
+ }
+Index: head-2008-12-01/arch/x86/kernel/microcode-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/microcode-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/microcode-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -5,13 +5,14 @@
+ * 2006 Shaohua Li <shaohua.li@intel.com>
+ *
+ * This driver allows to upgrade microcode on Intel processors
+- * belonging to IA-32 family - PentiumPro, Pentium II,
++ * belonging to IA-32 family - PentiumPro, Pentium II,
+ * Pentium III, Xeon, Pentium 4, etc.
+ *
+- * Reference: Section 8.10 of Volume III, Intel Pentium 4 Manual,
+- * Order Number 245472 or free download from:
+- *
+- * http://developer.intel.com/design/pentium4/manuals/245472.htm
++ * Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture
++ * Software Developer's Manual
++ * Order Number 253668 or free download from:
++ *
++ * http://developer.intel.com/design/pentium4/manuals/253668.htm
+ *
+ * For more information, go to http://www.urbanmyth.org/microcode
+ *
+@@ -26,6 +27,7 @@
+ #include <linux/kernel.h>
+ #include <linux/init.h>
+ #include <linux/sched.h>
++#include <linux/smp_lock.h>
+ #include <linux/cpumask.h>
+ #include <linux/module.h>
+ #include <linux/slab.h>
+@@ -86,6 +88,7 @@ static int do_microcode_update (const vo
+
+ static int microcode_open (struct inode *unused1, struct file *unused2)
+ {
++ cycle_kernel_lock();
+ return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+ }
+
+@@ -162,7 +165,7 @@ static int request_microcode(void)
+ c->x86, c->x86_model, c->x86_mask);
+ error = request_firmware(&firmware, name, µcode_pdev->dev);
+ if (error) {
+- pr_debug("microcode: ucode data file %s load failed\n", name);
++ pr_debug("microcode: data file %s load failed\n", name);
+ return error;
+ }
+
+@@ -183,6 +186,9 @@ static int __init microcode_init (void)
+ {
+ int error;
+
++ printk(KERN_INFO
++ "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
++
+ error = microcode_dev_init();
+ if (error)
+ return error;
+@@ -195,8 +201,6 @@ static int __init microcode_init (void)
+
+ request_microcode();
+
+- printk(KERN_INFO
+- "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
+ return 0;
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/mpparse-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/mpparse-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/mpparse-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -25,6 +25,9 @@
+ #include <asm/proto.h>
+ #include <asm/acpi.h>
+ #include <asm/bios_ebda.h>
++#include <asm/e820.h>
++#include <asm/trampoline.h>
++#include <asm/setup.h>
+
+ #include <mach_apic.h>
+ #ifdef CONFIG_X86_32
+@@ -32,28 +35,6 @@
+ #include <mach_mpparse.h>
+ #endif
+
+-/* Have we found an MP table */
+-int smp_found_config;
+-
+-/*
+- * Various Linux-internal data structures created from the
+- * MP-table.
+- */
+-#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
+-int mp_bus_id_to_type[MAX_MP_BUSSES];
+-#endif
+-
+-DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
+-int mp_bus_id_to_pci_bus[MAX_MP_BUSSES] = {[0 ... MAX_MP_BUSSES - 1] = -1 };
+-
+-static int mp_current_pci_id;
+-
+-int pic_mode;
+-
+-/*
+- * Intel MP BIOS table parsing routines:
+- */
+-
+ /*
+ * Checksum an MP configuration block.
+ */
+@@ -68,20 +49,8 @@ static int __init mpf_checksum(unsigned
+ return sum & 0xFF;
+ }
+
+-#ifdef CONFIG_X86_NUMAQ
+-/*
+- * Have to match translation table entries to main table entries by counter
+- * hence the mpc_record variable .... can't see a less disgusting way of
+- * doing this ....
+- */
+-
+-static int mpc_record;
+-static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY]
+- __cpuinitdata;
+-#endif
+-
+ #ifndef CONFIG_XEN
+-static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
++static void __init MP_processor_info(struct mpc_config_processor *m)
+ {
+ int apicid;
+ char *bootup_cpu = "";
+@@ -90,11 +59,12 @@ static void __cpuinit MP_processor_info(
+ disabled_cpus++;
+ return;
+ }
+-#ifdef CONFIG_X86_NUMAQ
+- apicid = mpc_apic_id(m, translation_table[mpc_record]);
+-#else
+- apicid = m->mpc_apicid;
+-#endif
++
++ if (x86_quirks->mpc_apic_id)
++ apicid = x86_quirks->mpc_apic_id(m);
++ else
++ apicid = m->mpc_apicid;
++
+ if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
+ bootup_cpu = " (Bootup-CPU)";
+ boot_cpu_physical_apicid = m->mpc_apicid;
+@@ -104,24 +74,23 @@ static void __cpuinit MP_processor_info(
+ generic_processor_info(apicid, m->mpc_apicver);
+ }
+ #else
+-static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
++static void __init MP_processor_info(struct mpc_config_processor *m)
+ {
+ num_processors++;
+ }
+ #endif /* CONFIG_XEN */
+
++#ifdef CONFIG_X86_IO_APIC
+ static void __init MP_bus_info(struct mpc_config_bus *m)
+ {
+ char str[7];
+-
+ memcpy(str, m->mpc_bustype, 6);
+ str[6] = 0;
+
+-#ifdef CONFIG_X86_NUMAQ
+- mpc_oem_bus_info(m, str, translation_table[mpc_record]);
+-#else
+- Dprintk("Bus #%d is %s\n", m->mpc_busid, str);
+-#endif
++ if (x86_quirks->mpc_oem_bus_info)
++ x86_quirks->mpc_oem_bus_info(m, str);
++ else
++ apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->mpc_busid, str);
+
+ #if MAX_MP_BUSSES < 256
+ if (m->mpc_busid >= MAX_MP_BUSSES) {
+@@ -138,12 +107,10 @@ static void __init MP_bus_info(struct mp
+ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
+ #endif
+ } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
+-#ifdef CONFIG_X86_NUMAQ
+- mpc_oem_pci_bus(m, translation_table[mpc_record]);
+-#endif
++ if (x86_quirks->mpc_oem_pci_bus)
++ x86_quirks->mpc_oem_pci_bus(m);
++
+ clear_bit(m->mpc_busid, mp_bus_not_pci);
+- mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
+- mp_current_pci_id++;
+ #if defined(CONFIG_EISA) || defined (CONFIG_MCA)
+ mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI;
+ } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
+@@ -154,6 +121,7 @@ static void __init MP_bus_info(struct mp
+ } else
+ printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
+ }
++#endif
+
+ #ifdef CONFIG_X86_IO_APIC
+
+@@ -183,117 +151,111 @@ static void __init MP_ioapic_info(struct
+ if (bad_ioapic(m->mpc_apicaddr))
+ return;
+
+- mp_ioapics[nr_ioapics] = *m;
++ mp_ioapics[nr_ioapics].mp_apicaddr = m->mpc_apicaddr;
++ mp_ioapics[nr_ioapics].mp_apicid = m->mpc_apicid;
++ mp_ioapics[nr_ioapics].mp_type = m->mpc_type;
++ mp_ioapics[nr_ioapics].mp_apicver = m->mpc_apicver;
++ mp_ioapics[nr_ioapics].mp_flags = m->mpc_flags;
+ nr_ioapics++;
+ }
+
+-static void __init MP_intsrc_info(struct mpc_config_intsrc *m)
++static void print_MP_intsrc_info(struct mpc_config_intsrc *m)
+ {
+- mp_irqs[mp_irq_entries] = *m;
+- Dprintk("Int: type %d, pol %d, trig %d, bus %d,"
++ apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
+ " IRQ %02x, APIC ID %x, APIC INT %02x\n",
+ m->mpc_irqtype, m->mpc_irqflag & 3,
+ (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
+ m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
+- if (++mp_irq_entries == MAX_IRQ_SOURCES)
+- panic("Max # of irq sources exceeded!!\n");
+ }
+
+-#endif
+-
+-static void __init MP_lintsrc_info(struct mpc_config_lintsrc *m)
++static void __init print_mp_irq_info(struct mp_config_intsrc *mp_irq)
+ {
+- Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
+- " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
+- m->mpc_irqtype, m->mpc_irqflag & 3,
+- (m->mpc_irqflag >> 2) & 3, m->mpc_srcbusid,
+- m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
++ apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
++ " IRQ %02x, APIC ID %x, APIC INT %02x\n",
++ mp_irq->mp_irqtype, mp_irq->mp_irqflag & 3,
++ (mp_irq->mp_irqflag >> 2) & 3, mp_irq->mp_srcbus,
++ mp_irq->mp_srcbusirq, mp_irq->mp_dstapic, mp_irq->mp_dstirq);
+ }
+
+-#ifdef CONFIG_X86_NUMAQ
+-static void __init MP_translation_info(struct mpc_config_translation *m)
++static void __init assign_to_mp_irq(struct mpc_config_intsrc *m,
++ struct mp_config_intsrc *mp_irq)
+ {
+- printk(KERN_INFO
+- "Translation: record %d, type %d, quad %d, global %d, local %d\n",
+- mpc_record, m->trans_type, m->trans_quad, m->trans_global,
+- m->trans_local);
++ mp_irq->mp_dstapic = m->mpc_dstapic;
++ mp_irq->mp_type = m->mpc_type;
++ mp_irq->mp_irqtype = m->mpc_irqtype;
++ mp_irq->mp_irqflag = m->mpc_irqflag;
++ mp_irq->mp_srcbus = m->mpc_srcbus;
++ mp_irq->mp_srcbusirq = m->mpc_srcbusirq;
++ mp_irq->mp_dstirq = m->mpc_dstirq;
++}
+
+- if (mpc_record >= MAX_MPC_ENTRY)
+- printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n");
+- else
+- translation_table[mpc_record] = m; /* stash this for later */
+- if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad))
+- node_set_online(m->trans_quad);
++static void __init assign_to_mpc_intsrc(struct mp_config_intsrc *mp_irq,
++ struct mpc_config_intsrc *m)
++{
++ m->mpc_dstapic = mp_irq->mp_dstapic;
++ m->mpc_type = mp_irq->mp_type;
++ m->mpc_irqtype = mp_irq->mp_irqtype;
++ m->mpc_irqflag = mp_irq->mp_irqflag;
++ m->mpc_srcbus = mp_irq->mp_srcbus;
++ m->mpc_srcbusirq = mp_irq->mp_srcbusirq;
++ m->mpc_dstirq = mp_irq->mp_dstirq;
+ }
+
+-/*
+- * Read/parse the MPC oem tables
+- */
++static int __init mp_irq_mpc_intsrc_cmp(struct mp_config_intsrc *mp_irq,
++ struct mpc_config_intsrc *m)
++{
++ if (mp_irq->mp_dstapic != m->mpc_dstapic)
++ return 1;
++ if (mp_irq->mp_type != m->mpc_type)
++ return 2;
++ if (mp_irq->mp_irqtype != m->mpc_irqtype)
++ return 3;
++ if (mp_irq->mp_irqflag != m->mpc_irqflag)
++ return 4;
++ if (mp_irq->mp_srcbus != m->mpc_srcbus)
++ return 5;
++ if (mp_irq->mp_srcbusirq != m->mpc_srcbusirq)
++ return 6;
++ if (mp_irq->mp_dstirq != m->mpc_dstirq)
++ return 7;
++
++ return 0;
++}
+
+-static void __init smp_read_mpc_oem(struct mp_config_oemtable *oemtable,
+- unsigned short oemsize)
++static void __init MP_intsrc_info(struct mpc_config_intsrc *m)
+ {
+- int count = sizeof(*oemtable); /* the header size */
+- unsigned char *oemptr = ((unsigned char *)oemtable) + count;
++ int i;
+
+- mpc_record = 0;
+- printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n",
+- oemtable);
+- if (memcmp(oemtable->oem_signature, MPC_OEM_SIGNATURE, 4)) {
+- printk(KERN_WARNING
+- "SMP mpc oemtable: bad signature [%c%c%c%c]!\n",
+- oemtable->oem_signature[0], oemtable->oem_signature[1],
+- oemtable->oem_signature[2], oemtable->oem_signature[3]);
+- return;
+- }
+- if (mpf_checksum((unsigned char *)oemtable, oemtable->oem_length)) {
+- printk(KERN_WARNING "SMP oem mptable: checksum error!\n");
+- return;
+- }
+- while (count < oemtable->oem_length) {
+- switch (*oemptr) {
+- case MP_TRANSLATION:
+- {
+- struct mpc_config_translation *m =
+- (struct mpc_config_translation *)oemptr;
+- MP_translation_info(m);
+- oemptr += sizeof(*m);
+- count += sizeof(*m);
+- ++mpc_record;
+- break;
+- }
+- default:
+- {
+- printk(KERN_WARNING
+- "Unrecognised OEM table entry type! - %d\n",
+- (int)*oemptr);
+- return;
+- }
+- }
++ print_MP_intsrc_info(m);
++
++ for (i = 0; i < mp_irq_entries; i++) {
++ if (!mp_irq_mpc_intsrc_cmp(&mp_irqs[i], m))
++ return;
+ }
++
++ assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
++ if (++mp_irq_entries == MAX_IRQ_SOURCES)
++ panic("Max # of irq sources exceeded!!\n");
+ }
+
+-static inline void mps_oem_check(struct mp_config_table *mpc, char *oem,
+- char *productid)
++#endif
++
++static void __init MP_lintsrc_info(struct mpc_config_lintsrc *m)
+ {
+- if (strncmp(oem, "IBM NUMA", 8))
+- printk("Warning! May not be a NUMA-Q system!\n");
+- if (mpc->mpc_oemptr)
+- smp_read_mpc_oem((struct mp_config_oemtable *)mpc->mpc_oemptr,
+- mpc->mpc_oemsize);
++ apic_printk(APIC_VERBOSE, "Lint: type %d, pol %d, trig %d, bus %02x,"
++ " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
++ m->mpc_irqtype, m->mpc_irqflag & 3,
++ (m->mpc_irqflag >> 2) & 3, m->mpc_srcbusid,
++ m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
+ }
+-#endif /* CONFIG_X86_NUMAQ */
+
+ /*
+ * Read/parse the MPC
+ */
+
+-static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early)
++static int __init smp_check_mpc(struct mp_config_table *mpc, char *oem,
++ char *str)
+ {
+- char str[16];
+- char oem[10];
+- int count = sizeof(*mpc);
+- unsigned char *mpt = ((unsigned char *)mpc) + count;
+
+ if (memcmp(mpc->mpc_signature, MPC_SIGNATURE, 4)) {
+ printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n",
+@@ -316,19 +278,41 @@ static int __init smp_read_mpc(struct mp
+ }
+ memcpy(oem, mpc->mpc_oem, 8);
+ oem[8] = 0;
+- printk(KERN_INFO "MPTABLE: OEM ID: %s ", oem);
++ printk(KERN_INFO "MPTABLE: OEM ID: %s\n", oem);
+
+ memcpy(str, mpc->mpc_productid, 12);
+ str[12] = 0;
+- printk("Product ID: %s ", str);
+
+-#ifdef CONFIG_X86_32
+- mps_oem_check(mpc, oem, str);
+-#endif
+- printk(KERN_INFO "MPTABLE: Product ID: %s ", str);
++ printk(KERN_INFO "MPTABLE: Product ID: %s\n", str);
+
+ printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->mpc_lapic);
+
++ return 1;
++}
++
++static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early)
++{
++ char str[16];
++ char oem[10];
++
++ int count = sizeof(*mpc);
++ unsigned char *mpt = ((unsigned char *)mpc) + count;
++
++ if (!smp_check_mpc(mpc, oem, str))
++ return 0;
++
++#ifdef CONFIG_X86_32
++ /*
++ * need to make sure summit and es7000's mps_oem_check is safe to be
++ * called early via genericarch 's mps_oem_check
++ */
++ if (early) {
++#ifdef CONFIG_X86_NUMAQ
++ numaq_mps_oem_check(mpc, oem, str);
++#endif
++ } else
++ mps_oem_check(mpc, oem, str);
++#endif
+ /* save the local APIC address, it might be non-default */
+ if (!acpi_lapic)
+ mp_lapic_addr = mpc->mpc_lapic;
+@@ -336,12 +320,17 @@ static int __init smp_read_mpc(struct mp
+ if (early)
+ return 1;
+
++ if (mpc->mpc_oemptr && x86_quirks->smp_read_mpc_oem) {
++ struct mp_config_oemtable *oem_table = (struct mp_config_oemtable *)(unsigned long)mpc->mpc_oemptr;
++ x86_quirks->smp_read_mpc_oem(oem_table, mpc->mpc_oemsize);
++ }
++
+ /*
+ * Now process the configuration blocks.
+ */
+-#ifdef CONFIG_X86_NUMAQ
+- mpc_record = 0;
+-#endif
++ if (x86_quirks->mpc_record)
++ *x86_quirks->mpc_record = 0;
++
+ while (count < mpc->mpc_length) {
+ switch (*mpt) {
+ case MP_PROCESSOR:
+@@ -359,7 +348,9 @@ static int __init smp_read_mpc(struct mp
+ {
+ struct mpc_config_bus *m =
+ (struct mpc_config_bus *)mpt;
++#ifdef CONFIG_X86_IO_APIC
+ MP_bus_info(m);
++#endif
+ mpt += sizeof(*m);
+ count += sizeof(*m);
+ break;
+@@ -405,10 +396,14 @@ static int __init smp_read_mpc(struct mp
+ count = mpc->mpc_length;
+ break;
+ }
+-#ifdef CONFIG_X86_NUMAQ
+- ++mpc_record;
+-#endif
++ if (x86_quirks->mpc_record)
++ (*x86_quirks->mpc_record)++;
+ }
++
++#ifdef CONFIG_X86_GENERICARCH
++ generic_bigsmp_probe();
++#endif
++
+ setup_apic_routing();
+ if (!num_processors)
+ printk(KERN_ERR "MPTABLE: no processors registered!\n");
+@@ -434,7 +429,7 @@ static void __init construct_default_ioi
+ intsrc.mpc_type = MP_INTSRC;
+ intsrc.mpc_irqflag = 0; /* conforming */
+ intsrc.mpc_srcbus = 0;
+- intsrc.mpc_dstapic = mp_ioapics[0].mpc_apicid;
++ intsrc.mpc_dstapic = mp_ioapics[0].mp_apicid;
+
+ intsrc.mpc_irqtype = mp_INT;
+
+@@ -495,40 +490,11 @@ static void __init construct_default_ioi
+ MP_intsrc_info(&intsrc);
+ }
+
+-#endif
+
+-static inline void __init construct_default_ISA_mptable(int mpc_default_type)
++static void __init construct_ioapic_table(int mpc_default_type)
+ {
+- struct mpc_config_processor processor;
+- struct mpc_config_bus bus;
+-#ifdef CONFIG_X86_IO_APIC
+ struct mpc_config_ioapic ioapic;
+-#endif
+- struct mpc_config_lintsrc lintsrc;
+- int linttypes[2] = { mp_ExtINT, mp_NMI };
+- int i;
+-
+- /*
+- * local APIC has default address
+- */
+- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
+-
+- /*
+- * 2 CPUs, numbered 0 & 1.
+- */
+- processor.mpc_type = MP_PROCESSOR;
+- /* Either an integrated APIC or a discrete 82489DX. */
+- processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
+- processor.mpc_cpuflag = CPU_ENABLED;
+- processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
+- (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
+- processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
+- processor.mpc_reserved[0] = 0;
+- processor.mpc_reserved[1] = 0;
+- for (i = 0; i < 2; i++) {
+- processor.mpc_apicid = i;
+- MP_processor_info(&processor);
+- }
++ struct mpc_config_bus bus;
+
+ bus.mpc_type = MP_BUS;
+ bus.mpc_busid = 0;
+@@ -557,7 +523,6 @@ static inline void __init construct_defa
+ MP_bus_info(&bus);
+ }
+
+-#ifdef CONFIG_X86_IO_APIC
+ ioapic.mpc_type = MP_IOAPIC;
+ ioapic.mpc_apicid = 2;
+ ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
+@@ -569,7 +534,42 @@ static inline void __init construct_defa
+ * We set up most of the low 16 IO-APIC pins according to MPS rules.
+ */
+ construct_default_ioirq_mptable(mpc_default_type);
++}
++#else
++static inline void __init construct_ioapic_table(int mpc_default_type) { }
+ #endif
++
++static inline void __init construct_default_ISA_mptable(int mpc_default_type)
++{
++ struct mpc_config_processor processor;
++ struct mpc_config_lintsrc lintsrc;
++ int linttypes[2] = { mp_ExtINT, mp_NMI };
++ int i;
++
++ /*
++ * local APIC has default address
++ */
++ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
++
++ /*
++ * 2 CPUs, numbered 0 & 1.
++ */
++ processor.mpc_type = MP_PROCESSOR;
++ /* Either an integrated APIC or a discrete 82489DX. */
++ processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
++ processor.mpc_cpuflag = CPU_ENABLED;
++ processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
++ (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
++ processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
++ processor.mpc_reserved[0] = 0;
++ processor.mpc_reserved[1] = 0;
++ for (i = 0; i < 2; i++) {
++ processor.mpc_apicid = i;
++ MP_processor_info(&processor);
++ }
++
++ construct_ioapic_table(mpc_default_type);
++
+ lintsrc.mpc_type = MP_LINTSRC;
+ lintsrc.mpc_irqflag = 0; /* conforming */
+ lintsrc.mpc_srcbusid = 0;
+@@ -587,10 +587,14 @@ static struct intel_mp_floating *mpf_fou
+ /*
+ * Scan the memory blocks for an SMP configuration block.
+ */
+-static void __init __get_smp_config(unsigned early)
++static void __init __get_smp_config(unsigned int early)
+ {
+ struct intel_mp_floating *mpf = mpf_found;
+
++ if (x86_quirks->mach_get_smp_config) {
++ if (x86_quirks->mach_get_smp_config(early))
++ return;
++ }
+ if (acpi_lapic && early)
+ return;
+ /*
+@@ -607,7 +611,7 @@ static void __init __get_smp_config(unsi
+
+ printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n",
+ mpf->mpf_specification);
+-#ifdef CONFIG_X86_32
++#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+ if (mpf->mpf_feature2 & (1 << 7)) {
+ printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
+ pic_mode = 1;
+@@ -639,7 +643,9 @@ static void __init __get_smp_config(unsi
+ * override the defaults.
+ */
+ if (!smp_read_mpc(isa_bus_to_virt(mpf->mpf_physptr), early)) {
++#ifdef CONFIG_X86_LOCAL_APIC
+ smp_found_config = 0;
++#endif
+ printk(KERN_ERR
+ "BIOS bug, MP table errors detected!...\n");
+ printk(KERN_ERR "... disabling SMP support. "
+@@ -696,7 +702,8 @@ static int __init smp_scan_config(unsign
+ unsigned int *bp = isa_bus_to_virt(base);
+ struct intel_mp_floating *mpf;
+
+- Dprintk("Scan SMP from %p for %ld bytes.\n", bp, length);
++ apic_printk(APIC_VERBOSE, "Scan SMP from %p for %ld bytes.\n",
++ bp, length);
+ BUILD_BUG_ON(sizeof(*mpf) != 16);
+
+ while (length > 0) {
+@@ -706,16 +713,22 @@ static int __init smp_scan_config(unsign
+ !mpf_checksum((unsigned char *)bp, 16) &&
+ ((mpf->mpf_specification == 1)
+ || (mpf->mpf_specification == 4))) {
+-
++#ifdef CONFIG_X86_LOCAL_APIC
+ smp_found_config = 1;
++#endif
+ mpf_found = mpf;
+-#ifdef CONFIG_X86_32
++
+ #ifndef CONFIG_XEN
+ printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
+ mpf, virt_to_phys(mpf));
+- reserve_bootmem(virt_to_phys(mpf), PAGE_SIZE,
++
++ if (!reserve)
++ return 1;
++ reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE,
+ BOOTMEM_DEFAULT);
+ if (mpf->mpf_physptr) {
++ unsigned long size = PAGE_SIZE;
++#ifdef CONFIG_X86_32
+ /*
+ * We cannot access to MPC table to compute
+ * table size yet, as only few megabytes from
+@@ -725,27 +738,18 @@ static int __init smp_scan_config(unsign
+ * PAGE_SIZE from mpg->mpf_physptr yields BUG()
+ * in reserve_bootmem.
+ */
+- unsigned long size = PAGE_SIZE;
+ unsigned long end = max_low_pfn * PAGE_SIZE;
+ if (mpf->mpf_physptr + size > end)
+ size = end - mpf->mpf_physptr;
+- reserve_bootmem(mpf->mpf_physptr, size,
++#endif
++ reserve_bootmem_generic(mpf->mpf_physptr, size,
+ BOOTMEM_DEFAULT);
+ }
+ #else
+ printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
+ mpf, ((void *)bp - isa_bus_to_virt(base)) + base);
+ #endif
+-#elif !defined(CONFIG_XEN)
+- if (!reserve)
+- return 1;
+-
+- reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE);
+- if (mpf->mpf_physptr)
+- reserve_bootmem_generic(mpf->mpf_physptr,
+- PAGE_SIZE);
+-#endif
+- return 1;
++ return 1;
+ }
+ bp += 4;
+ length -= 16;
+@@ -753,10 +757,15 @@ static int __init smp_scan_config(unsign
+ return 0;
+ }
+
+-static void __init __find_smp_config(unsigned reserve)
++static void __init __find_smp_config(unsigned int reserve)
+ {
+ #ifndef CONFIG_XEN
+ unsigned int address;
++
++ if (x86_quirks->mach_find_smp_config) {
++ if (x86_quirks->mach_find_smp_config(reserve))
++ return;
++ }
+ #endif
+
+ /*
+@@ -805,300 +814,301 @@ void __init find_smp_config(void)
+ __find_smp_config(1);
+ }
+
+-/* --------------------------------------------------------------------------
+- ACPI-based MP Configuration
+- -------------------------------------------------------------------------- */
+-
+-/*
+- * Keep this outside and initialized to 0, for !CONFIG_ACPI builds:
+- */
+-int es7000_plat;
+-
+-#ifdef CONFIG_ACPI
++#ifdef CONFIG_X86_IO_APIC
++static u8 __initdata irq_used[MAX_IRQ_SOURCES];
+
+-#ifdef CONFIG_X86_IO_APIC
++static int __init get_MP_intsrc_index(struct mpc_config_intsrc *m)
++{
++ int i;
+
+-#define MP_ISA_BUS 0
++ if (m->mpc_irqtype != mp_INT)
++ return 0;
+
+-extern struct mp_ioapic_routing mp_ioapic_routing[MAX_IO_APICS];
++ if (m->mpc_irqflag != 0x0f)
++ return 0;
+
+-static int mp_find_ioapic(int gsi)
+-{
+- int i = 0;
++ /* not legacy */
+
+- /* Find the IOAPIC that manages this GSI. */
+- for (i = 0; i < nr_ioapics; i++) {
+- if ((gsi >= mp_ioapic_routing[i].gsi_base)
+- && (gsi <= mp_ioapic_routing[i].gsi_end))
+- return i;
++ for (i = 0; i < mp_irq_entries; i++) {
++ if (mp_irqs[i].mp_irqtype != mp_INT)
++ continue;
++
++ if (mp_irqs[i].mp_irqflag != 0x0f)
++ continue;
++
++ if (mp_irqs[i].mp_srcbus != m->mpc_srcbus)
++ continue;
++ if (mp_irqs[i].mp_srcbusirq != m->mpc_srcbusirq)
++ continue;
++ if (irq_used[i]) {
++ /* already claimed */
++ return -2;
++ }
++ irq_used[i] = 1;
++ return i;
+ }
+
+- printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
++ /* not found */
+ return -1;
+ }
+
+-static u8 __init uniq_ioapic_id(u8 id)
+-{
+-#ifdef CONFIG_X86_32
+- if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
+- !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+- return io_apic_get_unique_id(nr_ioapics, id);
+- else
+- return id;
+-#else
+- int i;
+- DECLARE_BITMAP(used, 256);
+- bitmap_zero(used, 256);
+- for (i = 0; i < nr_ioapics; i++) {
+- struct mpc_config_ioapic *ia = &mp_ioapics[i];
+- __set_bit(ia->mpc_apicid, used);
+- }
+- if (!test_bit(id, used))
+- return id;
+- return find_first_zero_bit(used, 256);
++#define SPARE_SLOT_NUM 20
++
++static struct mpc_config_intsrc __initdata *m_spare[SPARE_SLOT_NUM];
+ #endif
+-}
+
+-void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
++static int __init replace_intsrc_all(struct mp_config_table *mpc,
++ unsigned long mpc_new_phys,
++ unsigned long mpc_new_length)
+ {
+- int idx = 0;
+-
+- if (bad_ioapic(address))
+- return;
++#ifdef CONFIG_X86_IO_APIC
++ int i;
++ int nr_m_spare = 0;
++#endif
+
+- idx = nr_ioapics;
++ int count = sizeof(*mpc);
++ unsigned char *mpt = ((unsigned char *)mpc) + count;
+
+- mp_ioapics[idx].mpc_type = MP_IOAPIC;
+- mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
+- mp_ioapics[idx].mpc_apicaddr = address;
++ printk(KERN_INFO "mpc_length %x\n", mpc->mpc_length);
++ while (count < mpc->mpc_length) {
++ switch (*mpt) {
++ case MP_PROCESSOR:
++ {
++ struct mpc_config_processor *m =
++ (struct mpc_config_processor *)mpt;
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ case MP_BUS:
++ {
++ struct mpc_config_bus *m =
++ (struct mpc_config_bus *)mpt;
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ case MP_IOAPIC:
++ {
++ mpt += sizeof(struct mpc_config_ioapic);
++ count += sizeof(struct mpc_config_ioapic);
++ break;
++ }
++ case MP_INTSRC:
++ {
++#ifdef CONFIG_X86_IO_APIC
++ struct mpc_config_intsrc *m =
++ (struct mpc_config_intsrc *)mpt;
+
+-#ifndef CONFIG_XEN
+- set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
++ printk(KERN_INFO "OLD ");
++ print_MP_intsrc_info(m);
++ i = get_MP_intsrc_index(m);
++ if (i > 0) {
++ assign_to_mpc_intsrc(&mp_irqs[i], m);
++ printk(KERN_INFO "NEW ");
++ print_mp_irq_info(&mp_irqs[i]);
++ } else if (!i) {
++ /* legacy, do nothing */
++ } else if (nr_m_spare < SPARE_SLOT_NUM) {
++ /*
++ * not found (-1), or duplicated (-2)
++ * are invalid entries,
++ * we need to use the slot later
++ */
++ m_spare[nr_m_spare] = m;
++ nr_m_spare++;
++ }
+ #endif
+- mp_ioapics[idx].mpc_apicid = uniq_ioapic_id(id);
+-#ifdef CONFIG_X86_32
+- mp_ioapics[idx].mpc_apicver = io_apic_get_version(idx);
+-#else
+- mp_ioapics[idx].mpc_apicver = 0;
++ mpt += sizeof(struct mpc_config_intsrc);
++ count += sizeof(struct mpc_config_intsrc);
++ break;
++ }
++ case MP_LINTSRC:
++ {
++ struct mpc_config_lintsrc *m =
++ (struct mpc_config_lintsrc *)mpt;
++ mpt += sizeof(*m);
++ count += sizeof(*m);
++ break;
++ }
++ default:
++ /* wrong mptable */
++ printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n");
++ printk(KERN_ERR "type %x\n", *mpt);
++ print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16,
++ 1, mpc, mpc->mpc_length, 1);
++ goto out;
++ }
++ }
++
++#ifdef CONFIG_X86_IO_APIC
++ for (i = 0; i < mp_irq_entries; i++) {
++ if (irq_used[i])
++ continue;
++
++ if (mp_irqs[i].mp_irqtype != mp_INT)
++ continue;
++
++ if (mp_irqs[i].mp_irqflag != 0x0f)
++ continue;
++
++ if (nr_m_spare > 0) {
++ printk(KERN_INFO "*NEW* found ");
++ nr_m_spare--;
++ assign_to_mpc_intsrc(&mp_irqs[i], m_spare[nr_m_spare]);
++ m_spare[nr_m_spare] = NULL;
++ } else {
++ struct mpc_config_intsrc *m =
++ (struct mpc_config_intsrc *)mpt;
++ count += sizeof(struct mpc_config_intsrc);
++ if (!mpc_new_phys) {
++ printk(KERN_INFO "No spare slots, try to append...take your risk, new mpc_length %x\n", count);
++ } else {
++ if (count <= mpc_new_length)
++ printk(KERN_INFO "No spare slots, try to append..., new mpc_length %x\n", count);
++ else {
++ printk(KERN_ERR "mpc_new_length %lx is too small\n", mpc_new_length);
++ goto out;
++ }
++ }
++ assign_to_mpc_intsrc(&mp_irqs[i], m);
++ mpc->mpc_length = count;
++ mpt += sizeof(struct mpc_config_intsrc);
++ }
++ print_mp_irq_info(&mp_irqs[i]);
++ }
+ #endif
+- /*
+- * Build basic GSI lookup table to facilitate gsi->io_apic lookups
+- * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
+- */
+- mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid;
+- mp_ioapic_routing[idx].gsi_base = gsi_base;
+- mp_ioapic_routing[idx].gsi_end = gsi_base +
+- io_apic_get_redir_entries(idx);
+-
+- printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
+- "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
+- mp_ioapics[idx].mpc_apicver, mp_ioapics[idx].mpc_apicaddr,
+- mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
++out:
++ /* update checksum */
++ mpc->mpc_checksum = 0;
++ mpc->mpc_checksum -= mpf_checksum((unsigned char *)mpc,
++ mpc->mpc_length);
+
+- nr_ioapics++;
++ return 0;
+ }
+
+-void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
+-{
+- struct mpc_config_intsrc intsrc;
+- int ioapic = -1;
+- int pin = -1;
+-
+- /*
+- * Convert 'gsi' to 'ioapic.pin'.
+- */
+- ioapic = mp_find_ioapic(gsi);
+- if (ioapic < 0)
+- return;
+- pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
++static int __initdata enable_update_mptable;
+
+- /*
+- * TBD: This check is for faulty timer entries, where the override
+- * erroneously sets the trigger to level, resulting in a HUGE
+- * increase of timer interrupts!
+- */
+- if ((bus_irq == 0) && (trigger == 3))
+- trigger = 1;
++static int __init update_mptable_setup(char *str)
++{
++ enable_update_mptable = 1;
++ return 0;
++}
++early_param("update_mptable", update_mptable_setup);
+
+- intsrc.mpc_type = MP_INTSRC;
+- intsrc.mpc_irqtype = mp_INT;
+- intsrc.mpc_irqflag = (trigger << 2) | polarity;
+- intsrc.mpc_srcbus = MP_ISA_BUS;
+- intsrc.mpc_srcbusirq = bus_irq; /* IRQ */
+- intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; /* APIC ID */
+- intsrc.mpc_dstirq = pin; /* INTIN# */
++static unsigned long __initdata mpc_new_phys;
++static unsigned long mpc_new_length __initdata = 4096;
+
+- MP_intsrc_info(&intsrc);
++/* alloc_mptable or alloc_mptable=4k */
++static int __initdata alloc_mptable;
++static int __init parse_alloc_mptable_opt(char *p)
++{
++ enable_update_mptable = 1;
++ alloc_mptable = 1;
++ if (!p)
++ return 0;
++ mpc_new_length = PAGE_SIZE << get_order(memparse(p, &p));
++ return 0;
+ }
++early_param("alloc_mptable", parse_alloc_mptable_opt);
+
+-void __init mp_config_acpi_legacy_irqs(void)
++void __init early_reserve_e820_mpc_new(void)
+ {
+- struct mpc_config_intsrc intsrc;
+- int i = 0;
+- int ioapic = -1;
+-
+-#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
+- /*
+- * Fabricate the legacy ISA bus (bus #31).
+- */
+- mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
++ if (enable_update_mptable && alloc_mptable) {
++ u64 startt = PAGE_SIZE;
++#ifdef CONFIG_X86_TRAMPOLINE
++ startt = TRAMPOLINE_BASE;
+ #endif
+- set_bit(MP_ISA_BUS, mp_bus_not_pci);
+- Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
+-
+- /*
+- * Older generations of ES7000 have no legacy identity mappings
+- */
+- if (es7000_plat == 1)
+- return;
+-
+- /*
+- * Locate the IOAPIC that manages the ISA IRQs (0-15).
+- */
+- ioapic = mp_find_ioapic(0);
+- if (ioapic < 0)
+- return;
+-
+- intsrc.mpc_type = MP_INTSRC;
+- intsrc.mpc_irqflag = 0; /* Conforming */
+- intsrc.mpc_srcbus = MP_ISA_BUS;
+-#ifdef CONFIG_X86_IO_APIC
+- intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid;
+-#endif
+- /*
+- * Use the default configuration for the IRQs 0-15. Unless
+- * overridden by (MADT) interrupt source override entries.
+- */
+- for (i = 0; i < 16; i++) {
+- int idx;
+-
+- for (idx = 0; idx < mp_irq_entries; idx++) {
+- struct mpc_config_intsrc *irq = mp_irqs + idx;
+-
+- /* Do we already have a mapping for this ISA IRQ? */
+- if (irq->mpc_srcbus == MP_ISA_BUS
+- && irq->mpc_srcbusirq == i)
+- break;
+-
+- /* Do we already have a mapping for this IOAPIC pin */
+- if ((irq->mpc_dstapic == intsrc.mpc_dstapic) &&
+- (irq->mpc_dstirq == i))
+- break;
+- }
+-
+- if (idx != mp_irq_entries) {
+- printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
+- continue; /* IRQ already used */
+- }
+-
+- intsrc.mpc_irqtype = mp_INT;
+- intsrc.mpc_srcbusirq = i; /* Identity mapped */
+- intsrc.mpc_dstirq = i;
+-
+- MP_intsrc_info(&intsrc);
++ mpc_new_phys = early_reserve_e820(startt, mpc_new_length,
++ mpc_new_length);
+ }
+ }
+
+-int mp_register_gsi(u32 gsi, int triggering, int polarity)
++static int __init update_mp_table(void)
+ {
+- int ioapic;
+- int ioapic_pin;
+-#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+-#define MAX_GSI_NUM 4096
+-#define IRQ_COMPRESSION_START 64
++ char str[16];
++ char oem[10];
++ struct intel_mp_floating *mpf;
++ struct mp_config_table *mpc;
++ struct mp_config_table *mpc_new;
++
++ if (!enable_update_mptable)
++ return 0;
++
++ mpf = mpf_found;
++ if (!mpf)
++ return 0;
+
+- static int pci_irq = IRQ_COMPRESSION_START;
+ /*
+- * Mapping between Global System Interrupts, which
+- * represent all possible interrupts, and IRQs
+- * assigned to actual devices.
++ * Now see if we need to go further.
+ */
+- static int gsi_to_irq[MAX_GSI_NUM];
+-#else
++ if (mpf->mpf_feature1 != 0)
++ return 0;
+
+- if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
+- return gsi;
+-#endif
++ if (!mpf->mpf_physptr)
++ return 0;
+
+- /* Don't set up the ACPI SCI because it's already set up */
+- if (acpi_gbl_FADT.sci_interrupt == gsi)
+- return gsi;
++ mpc = isa_bus_to_virt(mpf->mpf_physptr);
+
+- ioapic = mp_find_ioapic(gsi);
+- if (ioapic < 0) {
+- printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
+- return gsi;
+- }
++ if (!smp_check_mpc(mpc, oem, str))
++ return 0;
+
+- ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
++ printk(KERN_INFO "mpf: %lx\n", virt_to_phys(mpf));
++ printk(KERN_INFO "mpf_physptr: %x\n", mpf->mpf_physptr);
+
+-#ifndef CONFIG_X86_32
+- if (ioapic_renumber_irq)
+- gsi = ioapic_renumber_irq(ioapic, gsi);
+-#endif
++ if (mpc_new_phys && mpc->mpc_length > mpc_new_length) {
++ mpc_new_phys = 0;
++ printk(KERN_INFO "mpc_new_length is %ld, please use alloc_mptable=8k\n",
++ mpc_new_length);
++ }
++
++ if (!mpc_new_phys) {
++ unsigned char old, new;
++ /* check if we can change the postion */
++ mpc->mpc_checksum = 0;
++ old = mpf_checksum((unsigned char *)mpc, mpc->mpc_length);
++ mpc->mpc_checksum = 0xff;
++ new = mpf_checksum((unsigned char *)mpc, mpc->mpc_length);
++ if (old == new) {
++ printk(KERN_INFO "mpc is readonly, please try alloc_mptable instead\n");
++ return 0;
++ }
++ printk(KERN_INFO "use in-positon replacing\n");
++ } else {
++ maddr_t mpc_new_bus;
+
+- /*
+- * Avoid pin reprogramming. PRTs typically include entries
+- * with redundant pin->gsi mappings (but unique PCI devices);
+- * we only program the IOAPIC on the first.
+- */
+- if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
+- printk(KERN_ERR "Invalid reference to IOAPIC pin "
+- "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
+- ioapic_pin);
+- return gsi;
+- }
+- if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
+- Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
+- mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
+-#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+- return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
+-#else
+- return gsi;
+-#endif
++ if (xen_create_contiguous_region((unsigned long)phys_to_virt(mpc_new_phys),
++ get_order(mpc_new_length), 32))
++ BUG();
++ mpc_new_bus = phys_to_machine(mpc_new_phys);
++ mpf->mpf_physptr = mpc_new_bus;
++ mpc_new = phys_to_virt(mpc_new_phys);
++ memcpy(mpc_new, mpc, mpc->mpc_length);
++ mpc = mpc_new;
++ /* check if we can modify that */
++ if (mpc_new_bus - mpf->mpf_physptr) {
++ struct intel_mp_floating *mpf_new;
++ /* steal 16 bytes from [0, 1k) */
++ printk(KERN_INFO "mpf new: %x\n", 0x400 - 16);
++ mpf_new = isa_bus_to_virt(0x400 - 16);
++ memcpy(mpf_new, mpf, 16);
++ mpf = mpf_new;
++ mpf->mpf_physptr = mpc_new_bus;
++ }
++ mpf->mpf_checksum = 0;
++ mpf->mpf_checksum -= mpf_checksum((unsigned char *)mpf, 16);
++ printk(KERN_INFO "mpf_physptr new: %x\n", mpf->mpf_physptr);
+ }
+
+- set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
+-#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+ /*
+- * For GSI >= 64, use IRQ compression
++ * only replace the one with mp_INT and
++ * MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW,
++ * already in mp_irqs , stored by ... and mp_config_acpi_gsi,
++ * may need pci=routeirq for all coverage
+ */
+- if ((gsi >= IRQ_COMPRESSION_START)
+- && (triggering == ACPI_LEVEL_SENSITIVE)) {
+- /*
+- * For PCI devices assign IRQs in order, avoiding gaps
+- * due to unused I/O APIC pins.
+- */
+- int irq = gsi;
+- if (gsi < MAX_GSI_NUM) {
+- /*
+- * Retain the VIA chipset work-around (gsi > 15), but
+- * avoid a problem where the 8254 timer (IRQ0) is setup
+- * via an override (so it's not on pin 0 of the ioapic),
+- * and at the same time, the pin 0 interrupt is a PCI
+- * type. The gsi > 15 test could cause these two pins
+- * to be shared as IRQ0, and they are not shareable.
+- * So test for this condition, and if necessary, avoid
+- * the pin collision.
+- */
+- gsi = pci_irq++;
+- /*
+- * Don't assign IRQ used by ACPI SCI
+- */
+- if (gsi == acpi_gbl_FADT.sci_interrupt)
+- gsi = pci_irq++;
+- gsi_to_irq[irq] = gsi;
+- } else {
+- printk(KERN_ERR "GSI %u is too high\n", gsi);
+- return gsi;
+- }
+- }
+-#endif
+- io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
+- triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
+- polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
+- return gsi;
++ replace_intsrc_all(mpc, mpc_new_phys, mpc_new_length);
++
++ return 0;
+ }
+
+-#endif /* CONFIG_X86_IO_APIC */
+-#endif /* CONFIG_ACPI */
++late_initcall(update_mp_table);
+Index: head-2008-12-01/arch/x86/kernel/nmi.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/nmi.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/nmi.c 2008-12-01 11:49:07.000000000 +0100
+@@ -27,7 +27,9 @@
+ #include <linux/kdebug.h>
+ #include <linux/smp.h>
+
++#ifndef CONFIG_XEN
+ #include <asm/i8259.h>
++#endif
+ #include <asm/io_apic.h>
+ #include <asm/smp.h>
+ #include <asm/nmi.h>
+@@ -179,8 +181,10 @@ int __init check_nmi_watchdog(void)
+ kfree(prev_nmi_count);
+ return 0;
+ error:
++#ifndef CONFIG_XEN
+ if (nmi_watchdog == NMI_IO_APIC && !timer_through_8259)
+ disable_8259A_irq(0);
++#endif
+ #ifdef CONFIG_X86_32
+ timer_ack = 0;
+ #endif
+Index: head-2008-12-01/arch/x86/kernel/pci-dma-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/pci-dma-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -5,13 +5,13 @@
+
+ #include <asm/proto.h>
+ #include <asm/dma.h>
+-#include <asm/gart.h>
++#include <asm/iommu.h>
+ #include <asm/calgary.h>
++#include <asm/amd_iommu.h>
+
+-int forbid_dac __read_mostly;
+-EXPORT_SYMBOL(forbid_dac);
++static int forbid_dac __read_mostly;
+
+-const struct dma_mapping_ops *dma_ops;
++struct dma_mapping_ops *dma_ops;
+ EXPORT_SYMBOL(dma_ops);
+
+ static int iommu_sac_force __read_mostly;
+@@ -74,13 +74,17 @@ early_param("dma32_size", parse_dma32_si
+ void __init dma32_reserve_bootmem(void)
+ {
+ unsigned long size, align;
+- if (end_pfn <= MAX_DMA32_PFN)
++ if (max_pfn <= MAX_DMA32_PFN)
+ return;
+
++ /*
++ * check aperture_64.c allocate_aperture() for reason about
++ * using 512M as goal
++ */
+ align = 64ULL<<20;
+ size = round_up(dma32_bootmem_size, align);
+ dma32_bootmem_ptr = __alloc_bootmem_nopanic(size, align,
+- __pa(MAX_DMA_ADDRESS));
++ 512ULL<<20);
+ if (dma32_bootmem_ptr)
+ dma32_bootmem_size = size;
+ else
+@@ -88,17 +92,14 @@ void __init dma32_reserve_bootmem(void)
+ }
+ static void __init dma32_free_bootmem(void)
+ {
+- int node;
+
+- if (end_pfn <= MAX_DMA32_PFN)
++ if (max_pfn <= MAX_DMA32_PFN)
+ return;
+
+ if (!dma32_bootmem_ptr)
+ return;
+
+- for_each_online_node(node)
+- free_bootmem_node(NODE_DATA(node), __pa(dma32_bootmem_ptr),
+- dma32_bootmem_size);
++ free_bootmem(__pa(dma32_bootmem_ptr), dma32_bootmem_size);
+
+ dma32_bootmem_ptr = NULL;
+ dma32_bootmem_size = 0;
+@@ -107,7 +108,7 @@ static void __init dma32_free_bootmem(vo
+ #define dma32_free_bootmem() ((void)0)
+ #endif
+
+-static const struct dma_mapping_ops swiotlb_dma_ops = {
++static struct dma_mapping_ops swiotlb_dma_ops = {
+ .mapping_error = swiotlb_dma_mapping_error,
+ .map_single = swiotlb_map_single_phys,
+ .unmap_single = swiotlb_unmap_single,
+@@ -130,25 +131,31 @@ void __init pci_iommu_alloc(void)
+ * The order of these functions is important for
+ * fall-back/fail-over reasons
+ */
+-#ifdef CONFIG_GART_IOMMU
+ gart_iommu_hole_init();
+-#endif
+
+-#ifdef CONFIG_CALGARY_IOMMU
+ detect_calgary();
+-#endif
+
+ detect_intel_iommu();
+
+-#ifdef CONFIG_SWIOTLB
++ amd_iommu_detect();
++
+ swiotlb_init();
+ if (swiotlb) {
+ printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
+ dma_ops = &swiotlb_dma_ops;
+ }
+-#endif
+ }
+
++#ifndef CONFIG_XEN
++unsigned long iommu_num_pages(unsigned long addr, unsigned long len)
++{
++ unsigned long size = roundup((addr & ~PAGE_MASK) + len, PAGE_SIZE);
++
++ return size >> PAGE_SHIFT;
++}
++EXPORT_SYMBOL(iommu_num_pages);
++#endif
++
+ /*
+ * See <Documentation/x86_64/boot-options.txt> for the iommu kernel parameter
+ * documentation.
+@@ -201,9 +208,7 @@ static __init int iommu_setup(char *p)
+ swiotlb = 1;
+ #endif
+
+-#ifdef CONFIG_GART_IOMMU
+ gart_parse_options(p);
+-#endif
+
+ #ifdef CONFIG_CALGARY_IOMMU
+ if (!strncmp(p, "calgary", 7))
+@@ -245,136 +250,19 @@ int range_straddles_page_boundary(paddr_
+ !check_pages_physically_contiguous(pfn, offset, size));
+ }
+
+-#ifdef CONFIG_X86_32
+-int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+- dma_addr_t device_addr, size_t size, int flags)
+-{
+- void __iomem *mem_base = NULL;
+- int pages = size >> PAGE_SHIFT;
+- int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
+-
+- if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0)
+- goto out;
+- if (!size)
+- goto out;
+- if (dev->dma_mem)
+- goto out;
+-
+- /* FIXME: this routine just ignores DMA_MEMORY_INCLUDES_CHILDREN */
+-
+- mem_base = ioremap(bus_addr, size);
+- if (!mem_base)
+- goto out;
+-
+- dev->dma_mem = kzalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL);
+- if (!dev->dma_mem)
+- goto out;
+- dev->dma_mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+- if (!dev->dma_mem->bitmap)
+- goto free1_out;
+-
+- dev->dma_mem->virt_base = mem_base;
+- dev->dma_mem->device_base = device_addr;
+- dev->dma_mem->size = pages;
+- dev->dma_mem->flags = flags;
+-
+- if (flags & DMA_MEMORY_MAP)
+- return DMA_MEMORY_MAP;
+-
+- return DMA_MEMORY_IO;
+-
+- free1_out:
+- kfree(dev->dma_mem);
+- out:
+- if (mem_base)
+- iounmap(mem_base);
+- return 0;
+-}
+-EXPORT_SYMBOL(dma_declare_coherent_memory);
+-
+-void dma_release_declared_memory(struct device *dev)
+-{
+- struct dma_coherent_mem *mem = dev->dma_mem;
+-
+- if (!mem)
+- return;
+- dev->dma_mem = NULL;
+- iounmap(mem->virt_base);
+- kfree(mem->bitmap);
+- kfree(mem);
+-}
+-EXPORT_SYMBOL(dma_release_declared_memory);
+-
+-void *dma_mark_declared_memory_occupied(struct device *dev,
+- dma_addr_t device_addr, size_t size)
+-{
+- struct dma_coherent_mem *mem = dev->dma_mem;
+- int pos, err;
+- int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1);
+-
+- pages >>= PAGE_SHIFT;
+-
+- if (!mem)
+- return ERR_PTR(-EINVAL);
+-
+- pos = (device_addr - mem->device_base) >> PAGE_SHIFT;
+- err = bitmap_allocate_region(mem->bitmap, pos, get_order(pages));
+- if (err != 0)
+- return ERR_PTR(err);
+- return mem->virt_base + (pos << PAGE_SHIFT);
+-}
+-EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
+-
+-static int dma_alloc_from_coherent_mem(struct device *dev, ssize_t size,
+- dma_addr_t *dma_handle, void **ret)
+-{
+- struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
+- int order = get_order(size);
+-
+- if (mem) {
+- int page = bitmap_find_free_region(mem->bitmap, mem->size,
+- order);
+- if (page >= 0) {
+- *dma_handle = mem->device_base + (page << PAGE_SHIFT);
+- *ret = mem->virt_base + (page << PAGE_SHIFT);
+- memset(*ret, 0, size);
+- }
+- if (mem->flags & DMA_MEMORY_EXCLUSIVE)
+- *ret = NULL;
+- }
+- return (mem != NULL);
+-}
+-
+-static int dma_release_coherent(struct device *dev, int order, void *vaddr)
+-{
+- struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
+-
+- if (mem && vaddr >= mem->virt_base && vaddr <
+- (mem->virt_base + (mem->size << PAGE_SHIFT))) {
+- int page = (vaddr - mem->virt_base) >> PAGE_SHIFT;
+-
+- bitmap_release_region(mem->bitmap, page, order);
+- return 1;
+- }
+- return 0;
+-}
+-#else
+-#define dma_alloc_from_coherent_mem(dev, size, handle, ret) (0)
+-#define dma_release_coherent(dev, order, vaddr) (0)
+-#endif /* CONFIG_X86_32 */
+-
+ int dma_supported(struct device *dev, u64 mask)
+ {
++ struct dma_mapping_ops *ops = get_dma_ops(dev);
++
+ #ifdef CONFIG_PCI
+ if (mask > 0xffffffff && forbid_dac > 0) {
+- printk(KERN_INFO "PCI: Disallowing DAC for device %s\n",
+- dev->bus_id);
++ dev_info(dev, "PCI: Disallowing DAC for device\n");
+ return 0;
+ }
+ #endif
+
+- if (dma_ops->dma_supported)
+- return dma_ops->dma_supported(dev, mask);
++ if (ops->dma_supported)
++ return ops->dma_supported(dev, mask);
+
+ /* Copied from i386. Doesn't make much sense, because it will
+ only work for pci_alloc_coherent.
+@@ -395,8 +283,7 @@ int dma_supported(struct device *dev, u6
+ type. Normally this doesn't make any difference, but gives
+ more gentle handling of IOMMU overflow. */
+ if (iommu_sac_force && (mask >= DMA_40BIT_MASK)) {
+- printk(KERN_INFO "%s: Force SAC with mask %Lx\n",
+- dev->bus_id, mask);
++ dev_info(dev, "Force SAC with mask %Lx\n", mask);
+ return 0;
+ }
+
+@@ -422,6 +309,9 @@ void *
+ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
+ gfp_t gfp)
+ {
++#ifndef CONFIG_XEN
++ struct dma_mapping_ops *ops = get_dma_ops(dev);
++#endif
+ void *memory = NULL;
+ struct page *page;
+ unsigned long dma_mask = 0;
+@@ -431,7 +321,7 @@ dma_alloc_coherent(struct device *dev, s
+ /* ignore region specifiers */
+ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
+
+- if (dma_alloc_from_coherent_mem(dev, size, dma_handle, &memory))
++ if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
+ return memory;
+
+ if (!dev) {
+@@ -491,8 +381,8 @@ dma_alloc_coherent(struct device *dev, s
+ /* Let low level make its own zone decisions */
+ gfp &= ~(GFP_DMA32|GFP_DMA);
+
+- if (dma_ops->alloc_coherent)
+- return dma_ops->alloc_coherent(dev, size,
++ if (ops->alloc_coherent)
++ return ops->alloc_coherent(dev, size,
+ dma_handle, gfp);
+ return NULL;
+ }
+@@ -504,14 +394,14 @@ dma_alloc_coherent(struct device *dev, s
+ }
+ }
+
+- if (dma_ops->alloc_coherent) {
++ if (ops->alloc_coherent) {
+ free_pages((unsigned long)memory, order);
+ gfp &= ~(GFP_DMA|GFP_DMA32);
+- return dma_ops->alloc_coherent(dev, size, dma_handle, gfp);
++ return ops->alloc_coherent(dev, size, dma_handle, gfp);
+ }
+
+- if (dma_ops->map_simple) {
+- *dma_handle = dma_ops->map_simple(dev, virt_to_bus(memory),
++ if (ops->map_simple) {
++ *dma_handle = ops->map_simple(dev, virt_to_bus(memory),
+ size,
+ PCI_DMA_BIDIRECTIONAL);
+ if (*dma_handle != bad_dma_address)
+@@ -542,13 +432,17 @@ EXPORT_SYMBOL(dma_alloc_coherent);
+ void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t bus)
+ {
++#ifndef CONFIG_XEN
++ struct dma_mapping_ops *ops = get_dma_ops(dev);
++#endif
++
+ int order = get_order(size);
+ WARN_ON(irqs_disabled()); /* for portability */
+- if (dma_release_coherent(dev, order, vaddr))
++ if (dma_release_from_coherent(dev, order, vaddr))
+ return;
+ #ifndef CONFIG_XEN
+- if (dma_ops->unmap_single)
+- dma_ops->unmap_single(dev, bus, size, 0);
++ if (ops->unmap_single)
++ ops->unmap_single(dev, bus, size, 0);
+ #endif
+ xen_destroy_contiguous_region((unsigned long)vaddr, order);
+ free_pages((unsigned long)vaddr, order);
+@@ -557,15 +451,13 @@ EXPORT_SYMBOL(dma_free_coherent);
+
+ static int __init pci_iommu_init(void)
+ {
+-#ifdef CONFIG_CALGARY_IOMMU
+ calgary_iommu_init();
+-#endif
+
+ intel_iommu_init();
+
+-#ifdef CONFIG_GART_IOMMU
++ amd_iommu_init();
++
+ gart_iommu_init();
+-#endif
+
+ no_iommu_init();
+ return 0;
+Index: head-2008-12-01/arch/x86/kernel/pci-nommu-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/pci-nommu-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/pci-nommu-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -79,18 +79,12 @@ gnttab_unmap_single(struct device *dev,
+ gnttab_dma_unmap_page(dma_addr);
+ }
+
+-static int nommu_mapping_error(dma_addr_t dma_addr)
+-{
+- return (dma_addr == bad_dma_address);
+-}
+-
+-static const struct dma_mapping_ops nommu_dma_ops = {
++static struct dma_mapping_ops nommu_dma_ops = {
+ .map_single = gnttab_map_single,
+ .unmap_single = gnttab_unmap_single,
+ .map_sg = gnttab_map_sg,
+ .unmap_sg = gnttab_unmap_sg,
+ .dma_supported = swiotlb_dma_supported,
+- .mapping_error = nommu_mapping_error
+ };
+
+ void __init no_iommu_init(void)
+Index: head-2008-12-01/arch/x86/kernel/probe_roms_32.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/probe_roms_32.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/probe_roms_32.c 2008-12-01 11:49:07.000000000 +0100
+@@ -99,6 +99,11 @@ void __init probe_roms(void)
+ unsigned char c;
+ int i;
+
++#ifdef CONFIG_XEN
++ if (!is_initial_xendomain())
++ return;
++#endif
++
+ /* video rom */
+ upper = adapter_rom_resources[0].start;
+ for (start = video_rom_resource.start; start < upper; start += 2048) {
+@@ -131,7 +136,7 @@ void __init probe_roms(void)
+ upper = system_rom_resource.start;
+
+ /* check for extension rom (ignore length byte!) */
+- rom = isa_bus_to_virt(extension_rom_resource.start);
++ rom = isa_bus_to_virt((unsigned long)extension_rom_resource.start);
+ if (romsignature(rom)) {
+ length = extension_rom_resource.end - extension_rom_resource.start + 1;
+ if (romchecksum(rom, length)) {
+Index: head-2008-12-01/arch/x86/kernel/process-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -6,6 +6,13 @@
+ #include <linux/sched.h>
+ #include <linux/module.h>
+ #include <linux/pm.h>
++#include <linux/clockchips.h>
++#include <asm/system.h>
++
++unsigned long idle_halt;
++EXPORT_SYMBOL(idle_halt);
++unsigned long idle_nomwait;
++EXPORT_SYMBOL(idle_nomwait);
+
+ struct kmem_cache *task_xstate_cachep;
+
+@@ -45,6 +52,70 @@ void arch_task_cache_init(void)
+ SLAB_PANIC, NULL);
+ }
+
++/*
++ * Idle related variables and functions
++ */
++unsigned long boot_option_idle_override = 0;
++EXPORT_SYMBOL(boot_option_idle_override);
++
++/*
++ * Powermanagement idle function, if any..
++ */
++void (*pm_idle)(void);
++EXPORT_SYMBOL(pm_idle);
++
++#ifdef CONFIG_X86_32
++/*
++ * This halt magic was a workaround for ancient floppy DMA
++ * wreckage. It should be safe to remove.
++ */
++static int hlt_counter;
++void disable_hlt(void)
++{
++ hlt_counter++;
++}
++EXPORT_SYMBOL(disable_hlt);
++
++void enable_hlt(void)
++{
++ hlt_counter--;
++}
++EXPORT_SYMBOL(enable_hlt);
++
++static inline int hlt_use_halt(void)
++{
++ return (!hlt_counter && boot_cpu_data.hlt_works_ok);
++}
++#else
++static inline int hlt_use_halt(void)
++{
++ return 1;
++}
++#endif
++
++/*
++ * We use this if we don't have any better
++ * idle routine..
++ */
++void xen_idle(void)
++{
++ current_thread_info()->status &= ~TS_POLLING;
++ /*
++ * TS_POLLING-cleared state must be visible before we
++ * test NEED_RESCHED:
++ */
++ smp_mb();
++
++ if (!need_resched())
++ safe_halt(); /* enables interrupts racelessly */
++ else
++ local_irq_enable();
++ current_thread_info()->status |= TS_POLLING;
++}
++#ifdef CONFIG_APM_MODULE
++EXPORT_SYMBOL(default_idle);
++#endif
++
+ static void do_nothing(void *unused)
+ {
+ }
+@@ -61,7 +132,7 @@ void cpu_idle_wait(void)
+ {
+ smp_mb();
+ /* kick all the CPUs so that they exit out of pm_idle */
+- smp_call_function(do_nothing, NULL, 0, 1);
++ smp_call_function(do_nothing, NULL, 1);
+ }
+ EXPORT_SYMBOL_GPL(cpu_idle_wait);
+
+@@ -125,60 +196,175 @@ static void poll_idle(void)
+ *
+ * idle=mwait overrides this decision and forces the usage of mwait.
+ */
++static int __cpuinitdata force_mwait;
++
++#define MWAIT_INFO 0x05
++#define MWAIT_ECX_EXTENDED_INFO 0x01
++#define MWAIT_EDX_C1 0xf0
++
+ static int __cpuinit mwait_usable(const struct cpuinfo_x86 *c)
+ {
++ u32 eax, ebx, ecx, edx;
++
+ if (force_mwait)
+ return 1;
+
+- if (c->x86_vendor == X86_VENDOR_AMD) {
+- switch(c->x86) {
+- case 0x10:
+- case 0x11:
+- return 0;
++ if (c->cpuid_level < MWAIT_INFO)
++ return 0;
++
++ cpuid(MWAIT_INFO, &eax, &ebx, &ecx, &edx);
++ /* Check, whether EDX has extended info about MWAIT */
++ if (!(ecx & MWAIT_ECX_EXTENDED_INFO))
++ return 1;
++
++ /*
++ * edx enumeratios MONITOR/MWAIT extensions. Check, whether
++ * C1 supports MWAIT
++ */
++ return (edx & MWAIT_EDX_C1);
++}
++
++/*
++ * Check for AMD CPUs, which have potentially C1E support
++ */
++static int __cpuinit check_c1e_idle(const struct cpuinfo_x86 *c)
++{
++ if (c->x86_vendor != X86_VENDOR_AMD)
++ return 0;
++
++ if (c->x86 < 0x0F)
++ return 0;
++
++ /* Family 0x0f models < rev F do not have C1E */
++ if (c->x86 == 0x0f && c->x86_model < 0x40)
++ return 0;
++
++ return 1;
++}
++
++static cpumask_t c1e_mask = CPU_MASK_NONE;
++static int c1e_detected;
++
++void c1e_remove_cpu(int cpu)
++{
++ cpu_clear(cpu, c1e_mask);
++}
++
++/*
++ * C1E aware idle routine. We check for C1E active in the interrupt
++ * pending message MSR. If we detect C1E, then we handle it the same
++ * way as C3 power states (local apic timer and TSC stop)
++ */
++static void c1e_idle(void)
++{
++ if (need_resched())
++ return;
++
++ if (!c1e_detected) {
++ u32 lo, hi;
++
++ rdmsr(MSR_K8_INT_PENDING_MSG, lo, hi);
++ if (lo & K8_INTP_C1E_ACTIVE_MASK) {
++ c1e_detected = 1;
++ if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
++ mark_tsc_unstable("TSC halt in AMD C1E");
++ printk(KERN_INFO "System has AMD C1E enabled\n");
++ set_cpu_cap(&boot_cpu_data, X86_FEATURE_AMDC1E);
+ }
+ }
+- return 1;
++
++ if (c1e_detected) {
++ int cpu = smp_processor_id();
++
++ if (!cpu_isset(cpu, c1e_mask)) {
++ cpu_set(cpu, c1e_mask);
++ /*
++ * Force broadcast so ACPI can not interfere. Needs
++ * to run with interrupts enabled as it uses
++ * smp_function_call.
++ */
++ local_irq_enable();
++ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_FORCE,
++ &cpu);
++ printk(KERN_INFO "Switch to broadcast mode on CPU%d\n",
++ cpu);
++ local_irq_disable();
++ }
++ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu);
++
++ default_idle();
++
++ /*
++ * The switch back from broadcast mode needs to be
++ * called with interrupts disabled.
++ */
++ local_irq_disable();
++ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &cpu);
++ local_irq_enable();
++ } else
++ default_idle();
+ }
+ #endif
+
+ void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
+ {
+ #ifndef CONFIG_XEN
+- static int selected;
+-
+- if (selected)
+- return;
+ #ifdef CONFIG_X86_SMP
+ if (pm_idle == poll_idle && smp_num_siblings > 1) {
+ printk(KERN_WARNING "WARNING: polling idle and HT enabled,"
+ " performance may degrade.\n");
+ }
+ #endif
++ if (pm_idle)
++ return;
++
+ if (cpu_has(c, X86_FEATURE_MWAIT) && mwait_usable(c)) {
+ /*
+- * Skip, if setup has overridden idle.
+ * One CPU supports mwait => All CPUs supports mwait
+ */
+- if (!pm_idle) {
+- printk(KERN_INFO "using mwait in idle threads.\n");
+- pm_idle = mwait_idle;
+- }
+- }
+- selected = 1;
++ printk(KERN_INFO "using mwait in idle threads.\n");
++ pm_idle = mwait_idle;
++ } else if (check_c1e_idle(c)) {
++ printk(KERN_INFO "using C1E aware idle routine\n");
++ pm_idle = c1e_idle;
++ } else
++ pm_idle = default_idle;
+ #endif
+ }
+
+ static int __init idle_setup(char *str)
+ {
++ if (!str)
++ return -EINVAL;
++
+ if (!strcmp(str, "poll")) {
+ printk("using polling idle threads.\n");
+ pm_idle = poll_idle;
+- }
+ #ifndef CONFIG_XEN
+- else if (!strcmp(str, "mwait"))
++ } else if (!strcmp(str, "mwait"))
+ force_mwait = 1;
++ else if (!strcmp(str, "halt")) {
++ /*
++ * When the boot option of idle=halt is added, halt is
++ * forced to be used for CPU idle. In such case CPU C2/C3
++ * won't be used again.
++ * To continue to load the CPU idle driver, don't touch
++ * the boot_option_idle_override.
++ */
++ pm_idle = default_idle;
++ idle_halt = 1;
++ return 0;
++ } else if (!strcmp(str, "nomwait")) {
++ /*
++ * If the boot option of "idle=nomwait" is added,
++ * it means that mwait will be disabled for CPU C2/C3
++ * states. In such case it won't touch the variable
++ * of boot_option_idle_override.
++ */
++ idle_nomwait = 1;
++ return 0;
+ #endif
+- else
++ } else
+ return -1;
+
+ boot_option_idle_override = 1;
+Index: head-2008-12-01/arch/x86/kernel/process_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_32-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -59,15 +59,11 @@
+ #include <asm/tlbflush.h>
+ #include <asm/cpu.h>
+ #include <asm/kdebug.h>
++#include <asm/idle.h>
+
+ asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
+ asmlinkage void cstar_ret_from_fork(void) __asm__("cstar_ret_from_fork");
+
+-static int hlt_counter;
+-
+-unsigned long boot_option_idle_override = 0;
+-EXPORT_SYMBOL(boot_option_idle_override);
+-
+ DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
+ EXPORT_PER_CPU_SYMBOL(current_task);
+
+@@ -82,46 +78,27 @@ unsigned long thread_saved_pc(struct tas
+ return ((unsigned long *)tsk->thread.sp)[3];
+ }
+
+-/*
+- * Powermanagement idle function, if any..
+- */
+-void (*pm_idle)(void);
+-EXPORT_SYMBOL(pm_idle);
++#ifdef CONFIG_HOTPLUG_CPU
++#ifndef CONFIG_XEN
++#include <asm/nmi.h>
+
+-void disable_hlt(void)
++static void cpu_exit_clear(void)
+ {
+- hlt_counter++;
+-}
++ int cpu = raw_smp_processor_id();
+
+-EXPORT_SYMBOL(disable_hlt);
+-
+-void enable_hlt(void)
+-{
+- hlt_counter--;
+-}
++ idle_task_exit();
+
+-EXPORT_SYMBOL(enable_hlt);
++ cpu_uninit();
++ irq_ctx_exit(cpu);
+
+-static void xen_idle(void)
+-{
+- current_thread_info()->status &= ~TS_POLLING;
+- /*
+- * TS_POLLING-cleared state must be visible before we
+- * test NEED_RESCHED:
+- */
+- smp_mb();
++ cpu_clear(cpu, cpu_callout_map);
++ cpu_clear(cpu, cpu_callin_map);
+
+- if (!need_resched())
+- safe_halt(); /* enables interrupts racelessly */
+- else
+- local_irq_enable();
+- current_thread_info()->status |= TS_POLLING;
++ numa_remove_cpu(cpu);
++ c1e_remove_cpu(cpu);
+ }
+-#ifdef CONFIG_APM_MODULE
+-EXPORT_SYMBOL(default_idle);
+ #endif
+
+-#ifdef CONFIG_HOTPLUG_CPU
+ static inline void play_dead(void)
+ {
+ idle_task_exit();
+@@ -152,13 +129,11 @@ void cpu_idle(void)
+
+ /* endless idle loop with no priority at all */
+ while (1) {
+- tick_nohz_stop_sched_tick();
++ tick_nohz_stop_sched_tick(1);
+ while (!need_resched()) {
+- void (*idle)(void);
+
+ check_pgt_cache();
+ rmb();
+- idle = xen_idle; /* no alternatives */
+
+ if (rcu_pending(cpu))
+ rcu_check_callbacks(cpu, 0);
+@@ -168,7 +143,10 @@ void cpu_idle(void)
+
+ local_irq_disable();
+ __get_cpu_var(irq_stat).idle_timestamp = jiffies;
+- idle();
++ /* Don't trace irqs off for idle */
++ stop_critical_timings();
++ xen_idle();
++ start_critical_timings();
+ }
+ tick_nohz_restart_sched_tick();
+ preempt_enable_no_resched();
+Index: head-2008-12-01/arch/x86/kernel/process_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -65,15 +65,6 @@ asmlinkage extern void ret_from_fork(voi
+
+ unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED;
+
+-unsigned long boot_option_idle_override = 0;
+-EXPORT_SYMBOL(boot_option_idle_override);
+-
+-/*
+- * Powermanagement idle function, if any..
+- */
+-void (*pm_idle)(void);
+-EXPORT_SYMBOL(pm_idle);
+-
+ static ATOMIC_NOTIFIER_HEAD(idle_notifier);
+
+ void idle_notifier_register(struct notifier_block *n)
+@@ -103,25 +94,13 @@ void exit_idle(void)
+ __exit_idle();
+ }
+
+-static void xen_idle(void)
+-{
+- current_thread_info()->status &= ~TS_POLLING;
+- /*
+- * TS_POLLING-cleared state must be visible before we
+- * test NEED_RESCHED:
+- */
+- smp_mb();
+- if (!need_resched())
+- safe_halt(); /* enables interrupts racelessly */
+- else
+- local_irq_enable();
+- current_thread_info()->status |= TS_POLLING;
+-}
+-
+ #ifdef CONFIG_HOTPLUG_CPU
+ static inline void play_dead(void)
+ {
+ idle_task_exit();
++#ifndef CONFIG_XEN
++ c1e_remove_cpu(raw_smp_processor_id());
++#endif
+ local_irq_disable();
+ cpu_clear(smp_processor_id(), cpu_initialized);
+ preempt_enable_no_resched();
+@@ -146,12 +125,11 @@ void cpu_idle(void)
+ current_thread_info()->status |= TS_POLLING;
+ /* endless idle loop with no priority at all */
+ while (1) {
+- tick_nohz_stop_sched_tick();
++ tick_nohz_stop_sched_tick(1);
+ while (!need_resched()) {
+- void (*idle)(void);
+
+ rmb();
+- idle = xen_idle; /* no alternatives */
++
+ if (cpu_is_offline(smp_processor_id()))
+ play_dead();
+ /*
+@@ -161,7 +139,10 @@ void cpu_idle(void)
+ */
+ local_irq_disable();
+ enter_idle();
+- idle();
++ /* Don't trace irqs off for idle */
++ stop_critical_timings();
++ xen_idle();
++ start_critical_timings();
+ /* In many cases the interrupt that ended idle
+ has already called exit_idle. But some idle
+ loops can be woken up without interrupt. */
+@@ -271,7 +252,7 @@ void exit_thread(void)
+ }
+ }
+
+-void load_gs_index(unsigned gs)
++void xen_load_gs_index(unsigned gs)
+ {
+ WARN_ON(HYPERVISOR_set_segment_base(SEGBASE_GS_USER_SEL, gs));
+ }
+@@ -373,10 +354,10 @@ int copy_thread(int nr, unsigned long cl
+ p->thread.fs = me->thread.fs;
+ p->thread.gs = me->thread.gs;
+
+- asm("mov %%gs,%0" : "=m" (p->thread.gsindex));
+- asm("mov %%fs,%0" : "=m" (p->thread.fsindex));
+- asm("mov %%es,%0" : "=m" (p->thread.es));
+- asm("mov %%ds,%0" : "=m" (p->thread.ds));
++ savesegment(gs, p->thread.gsindex);
++ savesegment(fs, p->thread.fsindex);
++ savesegment(es, p->thread.es);
++ savesegment(ds, p->thread.ds);
+
+ if (unlikely(test_tsk_thread_flag(me, TIF_IO_BITMAP))) {
+ p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
+@@ -417,7 +398,9 @@ out:
+ void
+ start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+ {
+- asm volatile("movl %0, %%fs; movl %0, %%es; movl %0, %%ds" :: "r"(0));
++ loadsegment(fs, 0);
++ loadsegment(es, 0);
++ loadsegment(ds, 0);
+ load_gs_index(0);
+ regs->ip = new_ip;
+ regs->sp = new_sp;
+@@ -557,8 +540,8 @@ static inline void __switch_to_xtra(stru
+ struct task_struct *
+ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
+ {
+- struct thread_struct *prev = &prev_p->thread,
+- *next = &next_p->thread;
++ struct thread_struct *prev = &prev_p->thread;
++ struct thread_struct *next = &next_p->thread;
+ int cpu = smp_processor_id();
+ #ifndef CONFIG_X86_NO_TSS
+ struct tss_struct *tss = &per_cpu(init_tss, cpu);
+@@ -661,12 +644,25 @@ __switch_to(struct task_struct *prev_p,
+ */
+ if (unlikely(next->es))
+ loadsegment(es, next->es);
+-
++
+ if (unlikely(next->ds))
+ loadsegment(ds, next->ds);
+
++ /*
++ * Leave lazy mode, flushing any hypercalls made here.
++ * This must be done before restoring TLS segments so
++ * the GDT and LDT are properly updated, and must be
++ * done before math_state_restore, so the TS bit is up
++ * to date.
++ */
++ arch_leave_lazy_cpu_mode();
++
+ /*
+ * Switch FS and GS.
++ *
++ * Segment register != 0 always requires a reload. Also
++ * reload when it has changed. When prev process used 64bit
++ * base always reload to avoid an information leak.
+ */
+ if (unlikely(next->fsindex))
+ loadsegment(fs, next->fsindex);
+@@ -687,7 +683,8 @@ __switch_to(struct task_struct *prev_p,
+ write_pda(oldrsp, next->usersp);
+ write_pda(pcurrent, next_p);
+ write_pda(kernelstack,
+- (unsigned long)task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET);
++ (unsigned long)task_stack_page(next_p) +
++ THREAD_SIZE - PDA_STACKOFFSET);
+ #ifdef CONFIG_CC_STACKPROTECTOR
+ write_pda(stack_canary, next_p->stack_canary);
+
+@@ -848,7 +845,7 @@ long do_arch_prctl(struct task_struct *t
+ set_32bit_tls(task, FS_TLS, addr);
+ if (doit) {
+ load_TLS(&task->thread, cpu);
+- asm volatile("movl %0,%%fs" :: "r"(FS_TLS_SEL));
++ loadsegment(fs, FS_TLS_SEL);
+ }
+ task->thread.fsindex = FS_TLS_SEL;
+ task->thread.fs = 0;
+@@ -858,7 +855,7 @@ long do_arch_prctl(struct task_struct *t
+ if (doit) {
+ /* set the selector to 0 to not confuse
+ __switch_to */
+- asm volatile("movl %0,%%fs" :: "r" (0));
++ loadsegment(fs, 0);
+ ret = HYPERVISOR_set_segment_base(SEGBASE_FS,
+ addr);
+ }
+@@ -882,7 +879,7 @@ long do_arch_prctl(struct task_struct *t
+ if (task->thread.gsindex == GS_TLS_SEL)
+ base = read_32bit_tls(task, GS_TLS);
+ else if (doit) {
+- asm("movl %%gs,%0" : "=r" (gsindex));
++ savesegment(gs, gsindex);
+ if (gsindex)
+ rdmsrl(MSR_KERNEL_GS_BASE, base);
+ else
+Index: head-2008-12-01/arch/x86/kernel/quirks-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/quirks-xen.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/quirks-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -63,6 +63,7 @@ static enum {
+ ICH_FORCE_HPET_RESUME,
+ VT8237_FORCE_HPET_RESUME,
+ NVIDIA_FORCE_HPET_RESUME,
++ ATI_FORCE_HPET_RESUME,
+ } force_hpet_resume_type;
+
+ static void __iomem *rcba_base;
+@@ -156,6 +157,8 @@ static void ich_force_enable_hpet(struct
+
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0,
+ ich_force_enable_hpet);
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0,
++ ich_force_enable_hpet);
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1,
+ ich_force_enable_hpet);
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0,
+@@ -172,6 +175,12 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_I
+
+ static struct pci_dev *cached_dev;
+
++static void hpet_print_force_info(void)
++{
++ printk(KERN_INFO "HPET not enabled in BIOS. "
++ "You might try hpet=force boot option\n");
++}
++
+ static void old_ich_force_hpet_resume(void)
+ {
+ u32 val;
+@@ -251,8 +260,12 @@ static void old_ich_force_enable_hpet_us
+ {
+ if (hpet_force_user)
+ old_ich_force_enable_hpet(dev);
++ else
++ hpet_print_force_info();
+ }
+
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1,
++ old_ich_force_enable_hpet_user);
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
+ old_ich_force_enable_hpet_user);
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12,
+@@ -288,9 +301,14 @@ static void vt8237_force_enable_hpet(str
+ {
+ u32 uninitialized_var(val);
+
+- if (!hpet_force_user || hpet_address || force_hpet_address)
++ if (hpet_address || force_hpet_address)
+ return;
+
++ if (!hpet_force_user) {
++ hpet_print_force_info();
++ return;
++ }
++
+ pci_read_config_dword(dev, 0x68, &val);
+ /*
+ * Bit 7 is HPET enable bit.
+@@ -328,6 +346,36 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_V
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
+ vt8237_force_enable_hpet);
+
++static void ati_force_hpet_resume(void)
++{
++ pci_write_config_dword(cached_dev, 0x14, 0xfed00000);
++ printk(KERN_DEBUG "Force enabled HPET at resume\n");
++}
++
++static void ati_force_enable_hpet(struct pci_dev *dev)
++{
++ u32 uninitialized_var(val);
++
++ if (hpet_address || force_hpet_address)
++ return;
++
++ if (!hpet_force_user) {
++ hpet_print_force_info();
++ return;
++ }
++
++ pci_write_config_dword(dev, 0x14, 0xfed00000);
++ pci_read_config_dword(dev, 0x14, &val);
++ force_hpet_address = val;
++ force_hpet_resume_type = ATI_FORCE_HPET_RESUME;
++ dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
++ force_hpet_address);
++ cached_dev = dev;
++ return;
++}
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
++ ati_force_enable_hpet);
++
+ /*
+ * Undocumented chipset feature taken from LinuxBIOS.
+ */
+@@ -341,8 +389,13 @@ static void nvidia_force_enable_hpet(str
+ {
+ u32 uninitialized_var(val);
+
+- if (!hpet_force_user || hpet_address || force_hpet_address)
++ if (hpet_address || force_hpet_address)
++ return;
++
++ if (!hpet_force_user) {
++ hpet_print_force_info();
+ return;
++ }
+
+ pci_write_config_dword(dev, 0x44, 0xfed00001);
+ pci_read_config_dword(dev, 0x44, &val);
+@@ -395,6 +448,9 @@ void force_hpet_resume(void)
+ case NVIDIA_FORCE_HPET_RESUME:
+ nvidia_force_hpet_resume();
+ return;
++ case ATI_FORCE_HPET_RESUME:
++ ati_force_hpet_resume();
++ return;
+ default:
+ break;
+ }
+Index: head-2008-12-01/arch/x86/kernel/setup-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/setup-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -1,141 +1,1147 @@
+-#include <linux/kernel.h>
++/*
++ * Copyright (C) 1995 Linus Torvalds
++ *
++ * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
++ *
++ * Memory region support
++ * David Parsons <orc@pell.chi.il.us>, July-August 1999
++ *
++ * Added E820 sanitization routine (removes overlapping memory regions);
++ * Brian Moyle <bmoyle@mvista.com>, February 2001
++ *
++ * Moved CPU detection code to cpu/${cpu}.c
++ * Patrick Mochel <mochel@osdl.org>, March 2002
++ *
++ * Provisions for empty E820 memory regions (reported by certain BIOSes).
++ * Alex Achenbach <xela@slit.de>, December 2002.
++ *
++ */
++
++/*
++ * This file handles the architecture-dependent parts of initialization
++ */
++
++#include <linux/sched.h>
++#include <linux/mm.h>
++#include <linux/mmzone.h>
++#include <linux/screen_info.h>
++#include <linux/ioport.h>
++#include <linux/acpi.h>
++#include <linux/apm_bios.h>
++#include <linux/initrd.h>
++#include <linux/bootmem.h>
++#include <linux/seq_file.h>
++#include <linux/console.h>
++#include <linux/mca.h>
++#include <linux/root_dev.h>
++#include <linux/highmem.h>
+ #include <linux/module.h>
++#include <linux/efi.h>
+ #include <linux/init.h>
+-#include <linux/bootmem.h>
++#include <linux/edd.h>
++#include <linux/iscsi_ibft.h>
++#include <linux/nodemask.h>
++#include <linux/kexec.h>
++#include <linux/dmi.h>
++#include <linux/pfn.h>
++#include <linux/pci.h>
++#include <asm/pci-direct.h>
++#include <linux/init_ohci1394_dma.h>
++#include <linux/kvm_para.h>
++
++#include <linux/errno.h>
++#include <linux/kernel.h>
++#include <linux/stddef.h>
++#include <linux/unistd.h>
++#include <linux/ptrace.h>
++#include <linux/slab.h>
++#include <linux/user.h>
++#include <linux/delay.h>
++
++#include <linux/kallsyms.h>
++#include <linux/cpufreq.h>
++#include <linux/dma-mapping.h>
++#include <linux/ctype.h>
++#include <linux/uaccess.h>
++
+ #include <linux/percpu.h>
+-#include <asm/smp.h>
+-#include <asm/percpu.h>
++#include <linux/crash_dump.h>
++
++#include <video/edid.h>
++
++#include <asm/mtrr.h>
++#include <asm/apic.h>
++#include <asm/e820.h>
++#include <asm/mpspec.h>
++#include <asm/setup.h>
++#include <asm/arch_hooks.h>
++#include <asm/efi.h>
+ #include <asm/sections.h>
++#include <asm/dmi.h>
++#include <asm/io_apic.h>
++#include <asm/ist.h>
++#include <asm/vmi.h>
++#include <setup_arch.h>
++#include <asm/bios_ebda.h>
++#include <asm/cacheflush.h>
+ #include <asm/processor.h>
+-#include <asm/setup.h>
++#include <asm/bugs.h>
++
++#include <asm/system.h>
++#include <asm/vsyscall.h>
++#include <asm/smp.h>
++#include <asm/desc.h>
++#include <asm/dma.h>
++#include <asm/iommu.h>
++#include <asm/mmu_context.h>
++#include <asm/proto.h>
++
++#include <mach_apic.h>
++#include <asm/paravirt.h>
++
++#include <asm/percpu.h>
+ #include <asm/topology.h>
+-#include <asm/mpspec.h>
+ #include <asm/apicdef.h>
++#ifdef CONFIG_X86_64
++#include <asm/numa_64.h>
++#endif
++
++#ifdef CONFIG_XEN
++#include <asm/hypervisor.h>
++#include <xen/interface/kexec.h>
++#include <xen/interface/memory.h>
++#include <xen/interface/nmi.h>
++#include <xen/interface/physdev.h>
++#include <xen/features.h>
++#include <xen/firmware.h>
++#include <xen/xencons.h>
++
++shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
++EXPORT_SYMBOL(HYPERVISOR_shared_info);
+
+-#ifdef CONFIG_X86_LOCAL_APIC
+-unsigned int num_processors;
+-unsigned disabled_cpus __cpuinitdata;
+-/* Processor that is doing the boot up */
+-unsigned int boot_cpu_physical_apicid = -1U;
+-EXPORT_SYMBOL(boot_cpu_physical_apicid);
++static int xen_panic_event(struct notifier_block *, unsigned long, void *);
++static struct notifier_block xen_panic_block = {
++ xen_panic_event, NULL, 0 /* try to go last */
++};
+
+-DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID;
+-EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
++unsigned long *phys_to_machine_mapping;
++EXPORT_SYMBOL(phys_to_machine_mapping);
+
+-/* Bitmask of physically existing CPUs */
+-physid_mask_t phys_cpu_present_map;
++unsigned long *pfn_to_mfn_frame_list_list,
++#ifdef CONFIG_X86_64
++ *pfn_to_mfn_frame_list[512];
++#else
++ *pfn_to_mfn_frame_list[128];
++#endif
++
++/* Raw start-of-day parameters from the hypervisor. */
++start_info_t *xen_start_info;
++EXPORT_SYMBOL(xen_start_info);
++#endif
++
++#ifndef ARCH_SETUP
++#define ARCH_SETUP
++#endif
++
++#ifndef CONFIG_XEN
++#ifndef CONFIG_DEBUG_BOOT_PARAMS
++struct boot_params __initdata boot_params;
++#else
++struct boot_params boot_params;
++#endif
+ #endif
+
+-#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_X86_SMP)
+ /*
+- * Copy data used in early init routines from the initial arrays to the
+- * per cpu data areas. These arrays then become expendable and the
+- * *_early_ptr's are zeroed indicating that the static arrays are gone.
++ * Machine setup..
+ */
+-static void __init setup_per_cpu_maps(void)
++static struct resource data_resource = {
++ .name = "Kernel data",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource code_resource = {
++ .name = "Kernel code",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++static struct resource bss_resource = {
++ .name = "Kernel bss",
++ .start = 0,
++ .end = 0,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++
++#ifdef CONFIG_X86_32
++#ifndef CONFIG_XEN
++/* This value is set up by the early boot code to point to the value
++ immediately after the boot time page tables. It contains a *physical*
++ address, and must not be in the .bss segment! */
++unsigned long init_pg_tables_start __initdata = ~0UL;
++unsigned long init_pg_tables_end __initdata = ~0UL;
++#endif
++
++static struct resource video_ram_resource = {
++ .name = "Video RAM area",
++ .start = 0xa0000,
++ .end = 0xbffff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
++};
++
++/* cpu data as detected by the assembly code in head.S */
++struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
++/* common cpu data for all cpus */
++struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
++EXPORT_SYMBOL(boot_cpu_data);
++#ifndef CONFIG_XEN
++static void set_mca_bus(int x)
+ {
++#ifdef CONFIG_MCA
++ MCA_bus = x;
++#endif
++}
++
++unsigned int def_to_bigsmp;
++
++/* for MCA, but anyone else can use it if they want */
++unsigned int machine_id;
++unsigned int machine_submodel_id;
++unsigned int BIOS_revision;
++
++struct apm_info apm_info;
++EXPORT_SYMBOL(apm_info);
++#endif
++
++#if defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
++struct ist_info ist_info;
++EXPORT_SYMBOL(ist_info);
++#elif defined(CONFIG_X86_SPEEDSTEP_SMI)
++struct ist_info ist_info;
++#endif
++
++#else
++struct cpuinfo_x86 boot_cpu_data __read_mostly;
++EXPORT_SYMBOL(boot_cpu_data);
++#endif
++
++
++#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
++unsigned long mmu_cr4_features;
++#else
++unsigned long mmu_cr4_features = X86_CR4_PAE;
++#endif
++
++/* Boot loader ID as an integer, for the benefit of proc_dointvec */
++int bootloader_type;
++
++/*
++ * Early DMI memory
++ */
++int dmi_alloc_index;
++char dmi_alloc_data[DMI_MAX_DATA];
++
++/*
++ * Setup options
++ */
++struct screen_info screen_info;
++EXPORT_SYMBOL(screen_info);
++struct edid_info edid_info;
++EXPORT_SYMBOL_GPL(edid_info);
++
++extern int root_mountflags;
++
++unsigned long saved_video_mode;
++
++#define RAMDISK_IMAGE_START_MASK 0x07FF
++#define RAMDISK_PROMPT_FLAG 0x8000
++#define RAMDISK_LOAD_FLAG 0x4000
++
++static char __initdata command_line[COMMAND_LINE_SIZE];
++
++#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
++struct edd edd;
++#ifdef CONFIG_EDD_MODULE
++EXPORT_SYMBOL(edd);
++#endif
+ #ifndef CONFIG_XEN
+- int cpu;
++/**
++ * copy_edd() - Copy the BIOS EDD information
++ * from boot_params into a safe place.
++ *
++ */
++static inline void copy_edd(void)
++{
++ memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
++ sizeof(edd.mbr_signature));
++ memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
++ edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
++ edd.edd_info_nr = boot_params.eddbuf_entries;
++}
++#endif
++#else
++static inline void copy_edd(void)
++{
++}
++#endif
++
++#ifdef CONFIG_BLK_DEV_INITRD
++
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
++
++#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
++static void __init relocate_initrd(void)
++{
++
++ u64 ramdisk_image = boot_params.hdr.ramdisk_image;
++ u64 ramdisk_size = boot_params.hdr.ramdisk_size;
++ u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
++ u64 ramdisk_here;
++ unsigned long slop, clen, mapaddr;
++ char *p, *q;
++
++ /* We need to move the initrd down into lowmem */
++ ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
++ PAGE_SIZE);
++
++ if (ramdisk_here == -1ULL)
++ panic("Cannot find place for new RAMDISK of size %lld\n",
++ ramdisk_size);
++
++ /* Note: this includes all the lowmem currently occupied by
++ the initrd, we rely on that fact to keep the data intact. */
++ reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
++ "NEW RAMDISK");
++ initrd_start = ramdisk_here + PAGE_OFFSET;
++ initrd_end = initrd_start + ramdisk_size;
++ printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
++ ramdisk_here, ramdisk_here + ramdisk_size);
++
++ q = (char *)initrd_start;
++
++ /* Copy any lowmem portion of the initrd */
++ if (ramdisk_image < end_of_lowmem) {
++ clen = end_of_lowmem - ramdisk_image;
++ p = (char *)__va(ramdisk_image);
++ memcpy(q, p, clen);
++ q += clen;
++ ramdisk_image += clen;
++ ramdisk_size -= clen;
++ }
++
++ /* Copy the highmem portion of the initrd */
++ while (ramdisk_size) {
++ slop = ramdisk_image & ~PAGE_MASK;
++ clen = ramdisk_size;
++ if (clen > MAX_MAP_CHUNK-slop)
++ clen = MAX_MAP_CHUNK-slop;
++ mapaddr = ramdisk_image & PAGE_MASK;
++ p = early_ioremap(mapaddr, clen+slop);
++ memcpy(q, p+slop, clen);
++ early_iounmap(p, clen+slop);
++ q += clen;
++ ramdisk_image += clen;
++ ramdisk_size -= clen;
++ }
++ /* high pages is not converted by early_res_to_bootmem */
++ ramdisk_image = boot_params.hdr.ramdisk_image;
++ ramdisk_size = boot_params.hdr.ramdisk_size;
++ printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
++ " %08llx - %08llx\n",
++ ramdisk_image, ramdisk_image + ramdisk_size - 1,
++ ramdisk_here, ramdisk_here + ramdisk_size - 1);
++}
++#endif
++
++static void __init reserve_initrd(void)
++{
++#ifndef CONFIG_XEN
++ u64 ramdisk_image = boot_params.hdr.ramdisk_image;
++ u64 ramdisk_size = boot_params.hdr.ramdisk_size;
++ u64 ramdisk_end = ramdisk_image + ramdisk_size;
++ u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
+
+- for_each_possible_cpu(cpu) {
+- per_cpu(x86_cpu_to_apicid, cpu) = x86_cpu_to_apicid_init[cpu];
+- per_cpu(x86_bios_cpu_apicid, cpu) =
+- x86_bios_cpu_apicid_init[cpu];
+-#ifdef CONFIG_NUMA
+- per_cpu(x86_cpu_to_node_map, cpu) =
+- x86_cpu_to_node_map_init[cpu];
++ if (!boot_params.hdr.type_of_loader ||
++ !ramdisk_image || !ramdisk_size)
++ return; /* No initrd provided by bootloader */
++#else
++ unsigned long ramdisk_image = __pa(xen_start_info->mod_start);
++ unsigned long ramdisk_size = xen_start_info->mod_len;
++ unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
++ unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
++
++ if (!xen_start_info->mod_start || !ramdisk_size)
++ return; /* No initrd provided by bootloader */
+ #endif
++
++ initrd_start = 0;
++
++ if (ramdisk_size >= (end_of_lowmem>>1)) {
++ free_early(ramdisk_image, ramdisk_end);
++ printk(KERN_ERR "initrd too large to handle, "
++ "disabling initrd\n");
++ return;
+ }
+
+- /* indicate the early static arrays will soon be gone */
+- x86_cpu_to_apicid_early_ptr = NULL;
+- x86_bios_cpu_apicid_early_ptr = NULL;
+-#ifdef CONFIG_NUMA
+- x86_cpu_to_node_map_early_ptr = NULL;
++ printk(KERN_INFO "RAMDISK: %08lx - %08lx\n", ramdisk_image,
++ ramdisk_end);
++
++
++ if (ramdisk_end <= end_of_lowmem) {
++ /* All in lowmem, easy case */
++ /*
++ * don't need to reserve again, already reserved early
++ * in i386_start_kernel
++ */
++ initrd_start = ramdisk_image + PAGE_OFFSET;
++ initrd_end = initrd_start + ramdisk_size;
++#ifdef CONFIG_X86_64_XEN
++ initrd_below_start_ok = 1;
+ #endif
++ return;
++ }
++
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
++ relocate_initrd();
++#else
++ printk(KERN_ERR "initrd extends beyond end of memory "
++ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
++ ramdisk_end, end_of_lowmem);
++ initrd_start = 0;
+ #endif
++ free_early(ramdisk_image, ramdisk_end);
+ }
++#else
++static void __init reserve_initrd(void)
++{
++}
++#endif /* CONFIG_BLK_DEV_INITRD */
+
+-#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP
+-cpumask_t *cpumask_of_cpu_map __read_mostly;
+-EXPORT_SYMBOL(cpumask_of_cpu_map);
++static void __init parse_setup_data(void)
++{
++#ifndef CONFIG_XEN
++ struct setup_data *data;
++ u64 pa_data;
++
++ if (boot_params.hdr.version < 0x0209)
++ return;
++ pa_data = boot_params.hdr.setup_data;
++ while (pa_data) {
++ data = early_ioremap(pa_data, PAGE_SIZE);
++ switch (data->type) {
++ case SETUP_E820_EXT:
++ parse_e820_ext(data, pa_data);
++ break;
++ default:
++ break;
++ }
++ pa_data = data->next;
++ early_iounmap(data, PAGE_SIZE);
++ }
++#endif
++}
+
+-/* requires nr_cpu_ids to be initialized */
+-static void __init setup_cpumask_of_cpu(void)
++static void __init e820_reserve_setup_data(void)
+ {
+- int i;
++#ifndef CONFIG_XEN
++ struct setup_data *data;
++ u64 pa_data;
++ int found = 0;
+
+- /* alloc_bootmem zeroes memory */
+- cpumask_of_cpu_map = alloc_bootmem_low(sizeof(cpumask_t) * nr_cpu_ids);
+- for (i = 0; i < nr_cpu_ids; i++)
+- cpu_set(i, cpumask_of_cpu_map[i]);
++ if (boot_params.hdr.version < 0x0209)
++ return;
++ pa_data = boot_params.hdr.setup_data;
++ while (pa_data) {
++ data = early_ioremap(pa_data, sizeof(*data));
++ e820_update_range(pa_data, sizeof(*data)+data->len,
++ E820_RAM, E820_RESERVED_KERN);
++ found = 1;
++ pa_data = data->next;
++ early_iounmap(data, sizeof(*data));
++ }
++ if (!found)
++ return;
++
++ sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
++ memcpy(&e820_saved, &e820, sizeof(struct e820map));
++ printk(KERN_INFO "extended physical RAM map:\n");
++ e820_print_map("reserve setup_data");
++#endif
+ }
+-#else
+-static inline void setup_cpumask_of_cpu(void) { }
++
++static void __init reserve_early_setup_data(void)
++{
++#ifndef CONFIG_XEN
++ struct setup_data *data;
++ u64 pa_data;
++ char buf[32];
++
++ if (boot_params.hdr.version < 0x0209)
++ return;
++ pa_data = boot_params.hdr.setup_data;
++ while (pa_data) {
++ data = early_ioremap(pa_data, sizeof(*data));
++ sprintf(buf, "setup data %x", data->type);
++ reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
++ pa_data = data->next;
++ early_iounmap(data, sizeof(*data));
++ }
+ #endif
++}
+
+-#ifdef CONFIG_X86_32
+ /*
+- * Great future not-so-futuristic plan: make i386 and x86_64 do it
+- * the same way
++ * --------- Crashkernel reservation ------------------------------
++ */
++
++#ifdef CONFIG_KEXEC
++
++#ifndef CONFIG_XEN
++/**
++ * Reserve @size bytes of crashkernel memory at any suitable offset.
++ *
++ * @size: Size of the crashkernel memory to reserve.
++ * Returns the base address on success, and -1ULL on failure.
++ */
++unsigned long long __init find_and_reserve_crashkernel(unsigned long long size)
++{
++ const unsigned long long alignment = 16<<20; /* 16M */
++ unsigned long long start = 0LL;
++
++ while (1) {
++ int ret;
++
++ start = find_e820_area(start, ULONG_MAX, size, alignment);
++ if (start == -1ULL)
++ return start;
++
++ /* try to reserve it */
++ ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
++ if (ret >= 0)
++ return start;
++
++ start += alignment;
++ }
++}
++
++static inline unsigned long long get_total_mem(void)
++{
++ unsigned long long total;
++
++ total = max_low_pfn - min_low_pfn;
++#ifdef CONFIG_HIGHMEM
++ total += highend_pfn - highstart_pfn;
++#endif
++
++ return total << PAGE_SHIFT;
++}
++
++static void __init reserve_crashkernel(void)
++{
++ unsigned long long total_mem;
++ unsigned long long crash_size, crash_base;
++ int ret;
++
++ total_mem = get_total_mem();
++
++ ret = parse_crashkernel(boot_command_line, total_mem,
++ &crash_size, &crash_base);
++ if (ret != 0 || crash_size <= 0)
++ return;
++
++ /* 0 means: find the address automatically */
++ if (crash_base <= 0) {
++ crash_base = find_and_reserve_crashkernel(crash_size);
++ if (crash_base == -1ULL) {
++ pr_info("crashkernel reservation failed. "
++ "No suitable area found.\n");
++ return;
++ }
++ } else {
++ ret = reserve_bootmem_generic(crash_base, crash_size,
++ BOOTMEM_EXCLUSIVE);
++ if (ret < 0) {
++ pr_info("crashkernel reservation failed - "
++ "memory is in use\n");
++ return;
++ }
++ }
++
++ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
++ "for crashkernel (System RAM: %ldMB)\n",
++ (unsigned long)(crash_size >> 20),
++ (unsigned long)(crash_base >> 20),
++ (unsigned long)(total_mem >> 20));
++
++ crashk_res.start = crash_base;
++ crashk_res.end = crash_base + crash_size - 1;
++ insert_resource(&iomem_resource, &crashk_res);
++}
++#else
++#define reserve_crashkernel xen_machine_kexec_setup_resources
++#endif
++#else
++static void __init reserve_crashkernel(void)
++{
++}
++#endif
++
++static struct resource standard_io_resources[] = {
++ { .name = "dma1", .start = 0x00, .end = 0x1f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "pic1", .start = 0x20, .end = 0x21,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "timer0", .start = 0x40, .end = 0x43,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "timer1", .start = 0x50, .end = 0x53,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "keyboard", .start = 0x60, .end = 0x60,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "keyboard", .start = 0x64, .end = 0x64,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "dma page reg", .start = 0x80, .end = 0x8f,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "pic2", .start = 0xa0, .end = 0xa1,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "dma2", .start = 0xc0, .end = 0xdf,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO },
++ { .name = "fpu", .start = 0xf0, .end = 0xff,
++ .flags = IORESOURCE_BUSY | IORESOURCE_IO }
++};
++
++static void __init reserve_standard_io_resources(void)
++{
++ int i;
++
++ /* Nothing to do if not running in dom0. */
++ if (!is_initial_xendomain())
++ return;
++
++ /* request I/O space for devices used on all i[345]86 PCs */
++ for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
++ request_resource(&ioport_resource, &standard_io_resources[i]);
++
++}
++
++#ifdef CONFIG_PROC_VMCORE
++/* elfcorehdr= specifies the location of elf core header
++ * stored by the crashed kernel. This option will be passed
++ * by kexec loader to the capture kernel.
+ */
+-unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
+-EXPORT_SYMBOL(__per_cpu_offset);
++static int __init setup_elfcorehdr(char *arg)
++{
++ char *end;
++ if (!arg)
++ return -EINVAL;
++ elfcorehdr_addr = memparse(arg, &end);
++ return end > arg ? 0 : -EINVAL;
++}
++early_param("elfcorehdr", setup_elfcorehdr);
+ #endif
+
++static struct x86_quirks default_x86_quirks __initdata;
++
++struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
++
+ /*
+- * Great future plan:
+- * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
+- * Always point %gs to its beginning
++ * Determine if we were loaded by an EFI loader. If so, then we have also been
++ * passed the efi memmap, systab, etc., so we should use these data structures
++ * for initialization. Note, the efi init code path is determined by the
++ * global efi_enabled. This allows the same kernel image to be used on existing
++ * systems (with a traditional BIOS) as well as on EFI systems.
+ */
+-void __init setup_per_cpu_areas(void)
++/*
++ * setup_arch - architecture-specific boot-time initializations
++ *
++ * Note: On x86_64, fixmaps are ready for use even before this is called.
++ */
++
++void __init setup_arch(char **cmdline_p)
+ {
+- int i, highest_cpu = 0;
+- unsigned long size;
++#ifdef CONFIG_XEN
++ unsigned int i;
++ unsigned long p2m_pages;
++ struct physdev_set_iopl set_iopl;
+
+-#ifdef CONFIG_HOTPLUG_CPU
+- prefill_possible_map();
++#ifdef CONFIG_X86_32
++ /* Force a quick death if the kernel panics (not domain 0). */
++ extern int panic_timeout;
++ if (!panic_timeout && !is_initial_xendomain())
++ panic_timeout = 1;
+ #endif
+
+- /* Copy section for each CPU (we discard the original) */
+- size = PERCPU_ENOUGH_ROOM;
+- printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n",
+- size);
+-
+- for_each_possible_cpu(i) {
+- char *ptr;
+-#ifndef CONFIG_NEED_MULTIPLE_NODES
+- ptr = alloc_bootmem_pages(size);
+-#else
+- int node = early_cpu_to_node(i);
+- if (!node_online(node) || !NODE_DATA(node)) {
+- ptr = alloc_bootmem_pages(size);
+- printk(KERN_INFO
+- "cpu %d has no node or node-local memory\n", i);
+- }
+- else
+- ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
++ /* Register a call for panic conditions. */
++ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
++
++ WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
++ VMASST_TYPE_writable_pagetables));
++#ifdef CONFIG_X86_32
++ WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
++ VMASST_TYPE_4gb_segments));
++#endif
++#endif /* CONFIG_XEN */
++
++#ifdef CONFIG_X86_32
++ memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
++ visws_early_detect();
++ pre_setup_arch_hook();
++#else
++ printk(KERN_INFO "Command line: %s\n", boot_command_line);
++#endif
++
++ early_cpu_init();
++ early_ioremap_init();
++
++#ifndef CONFIG_XEN
++ ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
++ screen_info = boot_params.screen_info;
++ edid_info = boot_params.edid_info;
++#ifdef CONFIG_X86_32
++ apm_info.bios = boot_params.apm_bios_info;
++ ist_info = boot_params.ist_info;
++ if (boot_params.sys_desc_table.length != 0) {
++ set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
++ machine_id = boot_params.sys_desc_table.table[0];
++ machine_submodel_id = boot_params.sys_desc_table.table[1];
++ BIOS_revision = boot_params.sys_desc_table.table[2];
++ }
++#endif
++ saved_video_mode = boot_params.hdr.vid_mode;
++ bootloader_type = boot_params.hdr.type_of_loader;
++
++#ifdef CONFIG_BLK_DEV_RAM
++ rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
++ rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
++ rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
++#endif
++#ifdef CONFIG_EFI
++ if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
++#ifdef CONFIG_X86_32
++ "EL32",
++#else
++ "EL64",
++#endif
++ 4)) {
++ efi_enabled = 1;
++ efi_reserve_early();
++ }
++#endif
++#else /* CONFIG_XEN */
++#ifdef CONFIG_X86_32
++ /* This must be initialized to UNNAMED_MAJOR for ipconfig to work
++ properly. Setting ROOT_DEV to default to /dev/ram0 breaks initrd.
++ */
++ ROOT_DEV = MKDEV(UNNAMED_MAJOR,0);
++#else
++ ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
++#endif
++ if (is_initial_xendomain()) {
++ const struct dom0_vga_console_info *info =
++ (void *)((char *)xen_start_info +
++ xen_start_info->console.dom0.info_off);
++
++ dom0_init_screen_info(info,
++ xen_start_info->console.dom0.info_size);
++ xen_start_info->console.domU.mfn = 0;
++ xen_start_info->console.domU.evtchn = 0;
++ } else
++ screen_info.orig_video_isVGA = 0;
++ copy_edid();
++#endif /* CONFIG_XEN */
++
++ ARCH_SETUP
++
++ setup_memory_map();
++ parse_setup_data();
++ /* update the e820_saved too */
++ e820_reserve_setup_data();
++
++ copy_edd();
++
++#ifndef CONFIG_XEN
++ if (!boot_params.hdr.root_flags)
++ root_mountflags &= ~MS_RDONLY;
+ #endif
+- if (!ptr)
+- panic("Cannot allocate cpu data for CPU %d\n", i);
++ init_mm.start_code = (unsigned long) _text;
++ init_mm.end_code = (unsigned long) _etext;
++ init_mm.end_data = (unsigned long) _edata;
++#ifdef CONFIG_X86_32
++#ifndef CONFIG_XEN
++ init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
++#else
++ init_mm.brk = (PFN_UP(__pa(xen_start_info->pt_base)) +
++ xen_start_info->nr_pt_frames) << PAGE_SHIFT;
++#endif
++#else
++ init_mm.brk = (unsigned long) &_end;
++#endif
++
++ code_resource.start = virt_to_phys(_text);
++ code_resource.end = virt_to_phys(_etext)-1;
++ data_resource.start = virt_to_phys(_etext);
++ data_resource.end = virt_to_phys(_edata)-1;
++ bss_resource.start = virt_to_phys(&__bss_start);
++ bss_resource.end = virt_to_phys(&__bss_stop)-1;
++
++ strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
++ *cmdline_p = command_line;
++
++ parse_early_param();
++
+ #ifdef CONFIG_X86_64
+- cpu_pda(i)->data_offset = ptr - __per_cpu_start;
++ check_efer();
++#endif
++
++#if defined(CONFIG_VMI) && defined(CONFIG_X86_32)
++ /*
++ * Must be before kernel pagetables are setup
++ * or fixmap area is touched.
++ */
++ vmi_init();
++#endif
++
++ /* after early param, so could get panic from serial */
++ reserve_early_setup_data();
++
++ if (acpi_mps_check()) {
++#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
++ disable_apic = 1;
++#endif
++ setup_clear_cpu_cap(X86_FEATURE_APIC);
++ }
++
++#ifdef CONFIG_PCI
++ if (pci_early_dump_regs)
++ early_dump_pci_devices();
++#endif
++
++ finish_e820_parsing();
++
++#ifdef CONFIG_X86_32
++ probe_roms();
++#endif
++
++#ifndef CONFIG_XEN
++ /* after parse_early_param, so could debug it */
++ insert_resource(&iomem_resource, &code_resource);
++ insert_resource(&iomem_resource, &data_resource);
++ insert_resource(&iomem_resource, &bss_resource);
++
++ if (efi_enabled)
++ efi_init();
++
++#ifdef CONFIG_X86_32
++ if (ppro_with_ram_bug()) {
++ e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
++ E820_RESERVED);
++ sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
++ printk(KERN_INFO "fixed physical RAM map:\n");
++ e820_print_map("bad_ppro");
++ }
+ #else
+- __per_cpu_offset[i] = ptr - __per_cpu_start;
++ early_gart_iommu_check();
+ #endif
+- memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
++#endif /* CONFIG_XEN */
+
+- highest_cpu = i;
++ /*
++ * partially used pages are not usable - thus
++ * we are rounding upwards:
++ */
++ max_pfn = e820_end_of_ram_pfn();
++
++ /* preallocate 4k for mptable mpc */
++ early_reserve_e820_mpc_new();
++ /* update e820 for memory not covered by WB MTRRs */
++ mtrr_bp_init();
++#ifndef CONFIG_XEN
++ if (mtrr_trim_uncached_memory(max_pfn))
++ max_pfn = e820_end_of_ram_pfn();
++#endif
++
++#ifdef CONFIG_X86_32
++ /* max_low_pfn get updated here */
++ find_low_pfn_range();
++#else
++ num_physpages = max_pfn;
++ max_mapnr = max_pfn;
++
++
++ /* How many end-of-memory variables you have, grandma! */
++ /* need this before calling reserve_initrd */
++ if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
++ max_low_pfn = e820_end_of_low_ram_pfn();
++ else
++ max_low_pfn = max_pfn;
++
++ high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
++#endif
++
++ /* max_pfn_mapped is updated here */
++#ifdef CONFIG_X86_64_XEN
++ /*
++ * Due to the way initial table space gets calculated on Xen, we have
++ * to call init_memory_mapping() with the larger end address first.
++ */
++ if (max_pfn > max_low_pfn)
++ max_pfn_mapped = init_memory_mapping(1UL<<32,
++ max_pfn<<PAGE_SHIFT);
++ max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
++ if (max_pfn > max_low_pfn)
++ /* can we preserve max_low_pfn ?*/
++ max_low_pfn = max_pfn;
++ else
++ max_pfn_mapped = max_low_pfn_mapped;
++#else
++ max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
++ max_pfn_mapped = max_low_pfn_mapped;
++
++#ifdef CONFIG_X86_64
++ if (max_pfn > max_low_pfn) {
++ max_pfn_mapped = init_memory_mapping(1UL<<32,
++ max_pfn<<PAGE_SHIFT);
++ /* can we preseve max_low_pfn ?*/
++ max_low_pfn = max_pfn;
+ }
++#endif
++#endif
+
+- nr_cpu_ids = highest_cpu + 1;
+- printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d\n", NR_CPUS, nr_cpu_ids);
++ /*
++ * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
++ */
+
+- /* Setup percpu data maps */
+- setup_per_cpu_maps();
++#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
++ if (init_ohci1394_dma_early)
++ init_ohci1394_dma_on_all_controllers();
++#endif
+
+- /* Setup cpumask_of_cpu map */
+- setup_cpumask_of_cpu();
+-}
++ reserve_initrd();
++
++#if defined(CONFIG_X86_64) && !defined(CONFIG_XEN)
++ vsmp_init();
++#endif
++
++ if (is_initial_xendomain())
++ dmi_scan_machine();
++
++ io_delay_init();
++
++#ifdef CONFIG_ACPI
++ if (!is_initial_xendomain()) {
++ printk(KERN_INFO "ACPI in unprivileged domain disabled\n");
++ disable_acpi();
++ }
++#endif
++
++ /*
++ * Parse the ACPI tables for possible boot-time SMP configuration.
++ */
++ acpi_boot_table_init();
++
++#ifdef CONFIG_ACPI_NUMA
++ /*
++ * Parse SRAT to discover nodes.
++ */
++ acpi_numa_init();
++#endif
++
++ initmem_init(0, max_pfn);
+
++#ifdef CONFIG_ACPI_SLEEP
++ /*
++ * Reserve low memory region for sleep support.
++ */
++ acpi_reserve_bootmem();
+ #endif
++#ifdef CONFIG_X86_FIND_SMP_CONFIG
++ /*
++ * Find and reserve possible boot-time SMP configuration:
++ */
++ find_smp_config();
++#endif
++ reserve_crashkernel();
++
++#if defined(CONFIG_X86_64) && !defined(CONFIG_XEN)
++ /*
++ * dma32_reserve_bootmem() allocates bootmem which may conflict
++ * with the crashkernel command line, so do that after
++ * reserve_crashkernel()
++ */
++ dma32_reserve_bootmem();
++#endif
++
++ reserve_ibft_region();
++
++#ifdef CONFIG_KVM_CLOCK
++ kvmclock_init();
++#endif
++
++ xen_pagetable_setup_start(swapper_pg_dir);
++ paging_init();
++ xen_pagetable_setup_done(swapper_pg_dir);
++ paravirt_post_allocator_init();
++
++#ifdef CONFIG_X86_64
++ map_vsyscall();
++#endif
++
++#ifdef CONFIG_XEN
++ p2m_pages = max_pfn;
++ if (xen_start_info->nr_pages > max_pfn) {
++ /*
++ * the max_pfn was shrunk (probably by mem= or highmem=
++ * kernel parameter); shrink reservation with the HV
++ */
++ struct xen_memory_reservation reservation = {
++ .address_bits = 0,
++ .extent_order = 0,
++ .domid = DOMID_SELF
++ };
++ unsigned int difference;
++ int ret;
++
++ difference = xen_start_info->nr_pages - max_pfn;
++
++ set_xen_guest_handle(reservation.extent_start,
++ ((unsigned long *)xen_start_info->mfn_list) + max_pfn);
++ reservation.nr_extents = difference;
++ ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
++ &reservation);
++ BUG_ON(ret != difference);
++ }
++ else if (max_pfn > xen_start_info->nr_pages)
++ p2m_pages = xen_start_info->nr_pages;
++
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ unsigned long i, j;
++ unsigned int k, fpp;
++
++ /* Make sure we have a large enough P->M table. */
++ phys_to_machine_mapping = alloc_bootmem_pages(
++ max_pfn * sizeof(unsigned long));
++ memset(phys_to_machine_mapping, ~0,
++ max_pfn * sizeof(unsigned long));
++ memcpy(phys_to_machine_mapping,
++ (unsigned long *)xen_start_info->mfn_list,
++ p2m_pages * sizeof(unsigned long));
++ free_bootmem(
++ __pa(xen_start_info->mfn_list),
++ PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
++ sizeof(unsigned long))));
++
++ /*
++ * Initialise the list of the frames that specify the list of
++ * frames that make up the p2m table. Used by save/restore.
++ */
++ pfn_to_mfn_frame_list_list = alloc_bootmem_pages(PAGE_SIZE);
++
++ fpp = PAGE_SIZE/sizeof(unsigned long);
++ for (i = j = 0, k = -1; i < max_pfn; i += fpp, j++) {
++ if (j == fpp)
++ j = 0;
++ if (j == 0) {
++ k++;
++ BUG_ON(k>=ARRAY_SIZE(pfn_to_mfn_frame_list));
++ pfn_to_mfn_frame_list[k] =
++ alloc_bootmem_pages(PAGE_SIZE);
++ pfn_to_mfn_frame_list_list[k] =
++ virt_to_mfn(pfn_to_mfn_frame_list[k]);
++ }
++ pfn_to_mfn_frame_list[k][j] =
++ virt_to_mfn(&phys_to_machine_mapping[i]);
++ }
++ HYPERVISOR_shared_info->arch.max_pfn = max_pfn;
++ HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
++ virt_to_mfn(pfn_to_mfn_frame_list_list);
++ }
++
++ /* Mark all ISA DMA channels in-use - using them wouldn't work. */
++ for (i = 0; i < MAX_DMA_CHANNELS; ++i)
++ if (i != 4 && request_dma(i, "xen") != 0)
++ BUG();
++#endif /* CONFIG_XEN */
++
++#ifdef CONFIG_X86_GENERICARCH
++ generic_apic_probe();
++#endif
++
++#ifndef CONFIG_XEN
++ early_quirks();
++#endif
++
++ /*
++ * Read APIC and some other early information from ACPI tables.
++ */
++ acpi_boot_init();
++
++#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
++ /*
++ * get boot-time SMP configuration:
++ */
++ if (smp_found_config)
++ get_smp_config();
++#endif
++
++ prefill_possible_map();
++#ifdef CONFIG_X86_64
++ init_cpu_to_node();
++#endif
++
++#ifndef CONFIG_XEN
++ init_apic_mappings();
++ ioapic_init_mappings();
++
++ kvm_guest_init();
++
++ e820_reserve_resources();
++ e820_mark_nosave_regions(max_low_pfn);
++#else
++ if (is_initial_xendomain())
++ e820_reserve_resources();
++#endif
++
++#ifdef CONFIG_X86_32
++ request_resource(&iomem_resource, &video_ram_resource);
++#endif
++ reserve_standard_io_resources();
++
++#ifndef CONFIG_XEN
++ e820_setup_gap();
++
++#ifdef CONFIG_VT
++#if defined(CONFIG_VGA_CONSOLE)
++ if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
++ conswitchp = &vga_con;
++#elif defined(CONFIG_DUMMY_CONSOLE)
++ conswitchp = &dummy_con;
++#endif
++#endif
++#else /* CONFIG_XEN */
++ if (is_initial_xendomain())
++ e820_setup_gap();
++
++ set_iopl.iopl = 1;
++ WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
++
++#ifdef CONFIG_VT
++#ifdef CONFIG_DUMMY_CONSOLE
++ conswitchp = &dummy_con;
++#endif
++#ifdef CONFIG_VGA_CONSOLE
++ if (is_initial_xendomain())
++ conswitchp = &vga_con;
++#endif
++#endif
++#endif /* CONFIG_XEN */
++}
++
++#ifdef CONFIG_XEN
++static int
++xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
++{
++ HYPERVISOR_shutdown(SHUTDOWN_crash);
++ /* we're never actually going to get here... */
++ return NOTIFY_DONE;
++}
++#endif /* !CONFIG_XEN */
+Index: head-2008-12-01/arch/x86/kernel/setup64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,370 +0,0 @@
+-/*
+- * X86-64 specific CPU setup.
+- * Copyright (C) 1995 Linus Torvalds
+- * Copyright 2001, 2002, 2003 SuSE Labs / Andi Kleen.
+- * See setup.c for older changelog.
+- *
+- * Jun Nakajima <jun.nakajima@intel.com>
+- * Modified for Xen
+- *
+- */
+-#include <linux/init.h>
+-#include <linux/kernel.h>
+-#include <linux/sched.h>
+-#include <linux/string.h>
+-#include <linux/bootmem.h>
+-#include <linux/bitops.h>
+-#include <linux/module.h>
+-#include <linux/kgdb.h>
+-#include <asm/pda.h>
+-#include <asm/pgtable.h>
+-#include <asm/processor.h>
+-#include <asm/desc.h>
+-#include <asm/atomic.h>
+-#include <asm/mmu_context.h>
+-#include <asm/smp.h>
+-#include <asm/i387.h>
+-#include <asm/percpu.h>
+-#include <asm/proto.h>
+-#include <asm/sections.h>
+-#include <asm/setup.h>
+-#include <asm/genapic.h>
+-#ifdef CONFIG_XEN
+-#include <asm/hypervisor.h>
+-#endif
+-
+-#ifndef CONFIG_DEBUG_BOOT_PARAMS
+-struct boot_params __initdata boot_params;
+-#else
+-struct boot_params boot_params;
+-#endif
+-
+-cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
+-
+-struct x8664_pda *_cpu_pda[NR_CPUS] __read_mostly;
+-EXPORT_SYMBOL(_cpu_pda);
+-struct x8664_pda boot_cpu_pda[NR_CPUS] __cacheline_aligned;
+-
+-#ifndef CONFIG_X86_NO_IDT
+-struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
+-#endif
+-
+-char boot_cpu_stack[IRQSTACKSIZE] __attribute__((section(".bss.page_aligned")));
+-
+-unsigned long __supported_pte_mask __read_mostly = ~0UL;
+-EXPORT_SYMBOL(__supported_pte_mask);
+-
+-static int do_not_nx __cpuinitdata = 0;
+-
+-/* noexec=on|off
+-Control non executable mappings for 64bit processes.
+-
+-on Enable(default)
+-off Disable
+-*/
+-static int __init nonx_setup(char *str)
+-{
+- if (!str)
+- return -EINVAL;
+- if (!strncmp(str, "on", 2)) {
+- __supported_pte_mask |= _PAGE_NX;
+- do_not_nx = 0;
+- } else if (!strncmp(str, "off", 3)) {
+- do_not_nx = 1;
+- __supported_pte_mask &= ~_PAGE_NX;
+- }
+- return 0;
+-}
+-early_param("noexec", nonx_setup);
+-
+-int force_personality32 = 0;
+-
+-/* noexec32=on|off
+-Control non executable heap for 32bit processes.
+-To control the stack too use noexec=off
+-
+-on PROT_READ does not imply PROT_EXEC for 32bit processes (default)
+-off PROT_READ implies PROT_EXEC
+-*/
+-static int __init nonx32_setup(char *str)
+-{
+- if (!strcmp(str, "on"))
+- force_personality32 &= ~READ_IMPLIES_EXEC;
+- else if (!strcmp(str, "off"))
+- force_personality32 |= READ_IMPLIES_EXEC;
+- return 1;
+-}
+-__setup("noexec32=", nonx32_setup);
+-
+-#ifdef CONFIG_XEN
+-static void __init_refok switch_pt(int cpu)
+-{
+- if (cpu == 0)
+- xen_init_pt();
+- xen_pt_switch(__pa_symbol(init_level4_pgt));
+- xen_new_user_pt(__pa_symbol(__user_pgd(init_level4_pgt)));
+-}
+-#define switch_pt() switch_pt(cpu)
+-
+-static void __cpuinit cpu_gdt_init(const struct desc_ptr *gdt_descr)
+-{
+- unsigned long frames[16];
+- unsigned long va;
+- int f;
+-
+- for (va = gdt_descr->address, f = 0;
+- va < gdt_descr->address + gdt_descr->size;
+- va += PAGE_SIZE, f++) {
+- frames[f] = virt_to_mfn(va);
+- make_page_readonly(
+- (void *)va, XENFEAT_writable_descriptor_tables);
+- }
+- if (HYPERVISOR_set_gdt(frames, (gdt_descr->size + 1) /
+- sizeof (struct desc_struct)))
+- BUG();
+-}
+-#else
+-static void switch_pt(void)
+-{
+- asm volatile("movq %0,%%cr3" :: "r" (__pa_symbol(&init_level4_pgt)));
+-}
+-
+-static void __cpuinit cpu_gdt_init(const struct desc_ptr *gdt_descr)
+-{
+- load_gdt(gdt_descr);
+- load_idt(idt_descr);
+-}
+-#endif
+-
+-void pda_init(int cpu)
+-{
+- struct x8664_pda *pda = cpu_pda(cpu);
+-
+- /* Setup up data that may be needed in __get_free_pages early */
+- asm volatile("movl %0,%%fs ; movl %0,%%gs" :: "r" (0));
+-#ifndef CONFIG_XEN
+- /* Memory clobbers used to order PDA accessed */
+- mb();
+- wrmsrl(MSR_GS_BASE, pda);
+- mb();
+-#else
+- if (HYPERVISOR_set_segment_base(SEGBASE_GS_KERNEL,
+- (unsigned long)pda))
+- BUG();
+-#endif
+- pda->cpunumber = cpu;
+- pda->irqcount = -1;
+- pda->kernelstack =
+- (unsigned long)stack_thread_info() - PDA_STACKOFFSET + THREAD_SIZE;
+- pda->active_mm = &init_mm;
+- pda->mmu_state = 0;
+-
+- if (cpu == 0) {
+- /* others are initialized in smpboot.c */
+- pda->pcurrent = &init_task;
+- pda->irqstackptr = boot_cpu_stack;
+- } else {
+- pda->irqstackptr = (char *)
+- __get_free_pages(GFP_ATOMIC, IRQSTACK_ORDER);
+- if (!pda->irqstackptr)
+- panic("cannot allocate irqstack for cpu %d", cpu);
+- }
+-
+- switch_pt();
+-
+- pda->irqstackptr += IRQSTACKSIZE-64;
+-}
+-
+-#ifndef CONFIG_X86_NO_TSS
+-char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]
+-__attribute__((section(".bss.page_aligned")));
+-#endif
+-
+-extern asmlinkage void ignore_sysret(void);
+-
+-/* May not be marked __init: used by software suspend */
+-void syscall_init(void)
+-{
+-#ifndef CONFIG_XEN
+- /*
+- * LSTAR and STAR live in a bit strange symbiosis.
+- * They both write to the same internal register. STAR allows to set CS/DS
+- * but only a 32bit target. LSTAR sets the 64bit rip.
+- */
+- wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32);
+- wrmsrl(MSR_LSTAR, system_call);
+- wrmsrl(MSR_CSTAR, ignore_sysret);
+-
+- /* Flags to clear on syscall */
+- wrmsrl(MSR_SYSCALL_MASK,
+- X86_EFLAGS_TF|X86_EFLAGS_DF|X86_EFLAGS_IF|X86_EFLAGS_IOPL);
+-#endif
+-#ifdef CONFIG_IA32_EMULATION
+- syscall32_cpu_init ();
+-#else
+- {
+- static const struct callback_register cstar = {
+- .type = CALLBACKTYPE_syscall32,
+- .address = (unsigned long)ignore_sysret
+- };
+- if (HYPERVISOR_callback_op(CALLBACKOP_register, &cstar))
+- printk(KERN_WARN "Unable to register CSTAR callback\n");
+- }
+-#endif
+-}
+-
+-void __cpuinit check_efer(void)
+-{
+- unsigned long efer;
+-
+- rdmsrl(MSR_EFER, efer);
+- if (!(efer & EFER_NX) || do_not_nx) {
+- __supported_pte_mask &= ~_PAGE_NX;
+- }
+-}
+-
+-unsigned long kernel_eflags;
+-
+-#ifndef CONFIG_X86_NO_TSS
+-/*
+- * Copies of the original ist values from the tss are only accessed during
+- * debugging, no special alignment required.
+- */
+-DEFINE_PER_CPU(struct orig_ist, orig_ist);
+-#endif
+-
+-/*
+- * cpu_init() initializes state that is per-CPU. Some data is already
+- * initialized (naturally) in the bootstrap process, such as the GDT
+- * and IDT. We reload them nevertheless, this function acts as a
+- * 'CPU state barrier', nothing should get across.
+- * A lot of state is already set up in PDA init.
+- */
+-void __cpuinit cpu_init (void)
+-{
+- int cpu = stack_smp_processor_id();
+-#ifndef CONFIG_X86_NO_TSS
+- struct tss_struct *t = &per_cpu(init_tss, cpu);
+- struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
+- unsigned long v;
+- char *estacks = NULL;
+- unsigned i;
+-#endif
+- struct task_struct *me;
+-
+- /* CPU 0 is initialised in head64.c */
+- if (cpu != 0) {
+- pda_init(cpu);
+- }
+-#ifndef CONFIG_X86_NO_TSS
+- else
+- estacks = boot_exception_stacks;
+-#endif
+-
+- me = current;
+-
+- if (cpu_test_and_set(cpu, cpu_initialized))
+- panic("CPU#%d already initialized!\n", cpu);
+-
+- printk("Initializing CPU#%d\n", cpu);
+-
+- clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
+-
+- /*
+- * Initialize the per-CPU GDT with the boot GDT,
+- * and set up the GDT descriptor:
+- */
+-#ifndef CONFIG_XEN
+- if (cpu)
+- memcpy(get_cpu_gdt_table(cpu), cpu_gdt_table, GDT_SIZE);
+-#endif
+-
+- cpu_gdt_descr[cpu].size = GDT_SIZE;
+- cpu_gdt_init(&cpu_gdt_descr[cpu]);
+-
+- memset(me->thread.tls_array, 0, GDT_ENTRY_TLS_ENTRIES * 8);
+- syscall_init();
+-
+- wrmsrl(MSR_FS_BASE, 0);
+- wrmsrl(MSR_KERNEL_GS_BASE, 0);
+- barrier();
+-
+- check_efer();
+-
+-#ifndef CONFIG_X86_NO_TSS
+- /*
+- * set up and load the per-CPU TSS
+- */
+- for (v = 0; v < N_EXCEPTION_STACKS; v++) {
+- static const unsigned int order[N_EXCEPTION_STACKS] = {
+- [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
+- [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
+- };
+- if (cpu) {
+- estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
+- if (!estacks)
+- panic("Cannot allocate exception stack %ld %d\n",
+- v, cpu);
+- }
+- estacks += PAGE_SIZE << order[v];
+- orig_ist->ist[v] = t->x86_tss.ist[v] = (unsigned long)estacks;
+- }
+-
+- t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
+- /*
+- * <= is required because the CPU will access up to
+- * 8 bits beyond the end of the IO permission bitmap.
+- */
+- for (i = 0; i <= IO_BITMAP_LONGS; i++)
+- t->io_bitmap[i] = ~0UL;
+-#endif
+-
+- atomic_inc(&init_mm.mm_count);
+- me->active_mm = &init_mm;
+- if (me->mm)
+- BUG();
+- enter_lazy_tlb(&init_mm, me);
+-
+-#ifndef CONFIG_X86_NO_TSS
+- set_tss_desc(cpu, t);
+-#endif
+-#ifndef CONFIG_XEN
+- load_TR_desc();
+-#endif
+- load_LDT(&init_mm.context);
+-
+-#ifdef CONFIG_KGDB
+- /*
+- * If the kgdb is connected no debug regs should be altered. This
+- * is only applicable when KGDB and a KGDB I/O module are built
+- * into the kernel and you are using early debugging with
+- * kgdbwait. KGDB will control the kernel HW breakpoint registers.
+- */
+- if (kgdb_connected && arch_kgdb_ops.correct_hw_break)
+- arch_kgdb_ops.correct_hw_break();
+- else {
+-#endif
+- /*
+- * Clear all 6 debug registers:
+- */
+-
+- set_debugreg(0UL, 0);
+- set_debugreg(0UL, 1);
+- set_debugreg(0UL, 2);
+- set_debugreg(0UL, 3);
+- set_debugreg(0UL, 6);
+- set_debugreg(0UL, 7);
+-#ifdef CONFIG_KGDB
+- /* If the kgdb is connected no debug regs should be altered. */
+- }
+-#endif
+-
+- fpu_init();
+-
+- asm ("pushfq; popq %0" : "=rm" (kernel_eflags));
+- if (raw_irqs_disabled())
+- kernel_eflags &= ~X86_EFLAGS_IF;
+-
+- if (is_uv_system())
+- uv_cpu_init();
+-}
+Index: head-2008-12-01/arch/x86/kernel/setup_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,1151 +0,0 @@
+-/*
+- * Copyright (C) 1995 Linus Torvalds
+- *
+- * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
+- *
+- * Memory region support
+- * David Parsons <orc@pell.chi.il.us>, July-August 1999
+- *
+- * Added E820 sanitization routine (removes overlapping memory regions);
+- * Brian Moyle <bmoyle@mvista.com>, February 2001
+- *
+- * Moved CPU detection code to cpu/${cpu}.c
+- * Patrick Mochel <mochel@osdl.org>, March 2002
+- *
+- * Provisions for empty E820 memory regions (reported by certain BIOSes).
+- * Alex Achenbach <xela@slit.de>, December 2002.
+- *
+- */
+-
+-/*
+- * This file handles the architecture-dependent parts of initialization
+- */
+-
+-#include <linux/sched.h>
+-#include <linux/mm.h>
+-#include <linux/mmzone.h>
+-#include <linux/screen_info.h>
+-#include <linux/ioport.h>
+-#include <linux/acpi.h>
+-#include <linux/apm_bios.h>
+-#include <linux/initrd.h>
+-#include <linux/bootmem.h>
+-#include <linux/seq_file.h>
+-#include <linux/console.h>
+-#include <linux/mca.h>
+-#include <linux/root_dev.h>
+-#include <linux/highmem.h>
+-#include <linux/module.h>
+-#include <linux/efi.h>
+-#include <linux/init.h>
+-#include <linux/edd.h>
+-#include <linux/iscsi_ibft.h>
+-#include <linux/nodemask.h>
+-#include <linux/kernel.h>
+-#include <linux/percpu.h>
+-#include <linux/notifier.h>
+-#include <linux/kexec.h>
+-#include <linux/crash_dump.h>
+-#include <linux/dmi.h>
+-#include <linux/pfn.h>
+-#include <linux/pci.h>
+-#include <linux/init_ohci1394_dma.h>
+-#include <linux/kvm_para.h>
+-
+-#include <video/edid.h>
+-
+-#include <asm/mtrr.h>
+-#include <asm/apic.h>
+-#include <asm/e820.h>
+-#include <asm/mpspec.h>
+-#include <asm/mmzone.h>
+-#include <asm/setup.h>
+-#include <asm/arch_hooks.h>
+-#include <asm/sections.h>
+-#include <asm/io_apic.h>
+-#include <asm/ist.h>
+-#include <asm/io.h>
+-#include <asm/hypervisor.h>
+-#include <xen/interface/physdev.h>
+-#include <xen/interface/memory.h>
+-#include <xen/features.h>
+-#include <xen/firmware.h>
+-#include <xen/xencons.h>
+-#include <setup_arch.h>
+-#include <asm/bios_ebda.h>
+-#include <asm/cacheflush.h>
+-#include <asm/processor.h>
+-
+-#ifdef CONFIG_XEN
+-#include <xen/interface/kexec.h>
+-#endif
+-
+-static int xen_panic_event(struct notifier_block *, unsigned long, void *);
+-static struct notifier_block xen_panic_block = {
+- xen_panic_event, NULL, 0 /* try to go last */
+-};
+-
+-/*
+- * Machine setup..
+- */
+-static struct resource data_resource = {
+- .name = "Kernel data",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-static struct resource code_resource = {
+- .name = "Kernel code",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-static struct resource bss_resource = {
+- .name = "Kernel bss",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-static struct resource video_ram_resource = {
+- .name = "Video RAM area",
+- .start = 0xa0000,
+- .end = 0xbffff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+-};
+-
+-static struct resource standard_io_resources[] = { {
+- .name = "dma1",
+- .start = 0x0000,
+- .end = 0x001f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "pic1",
+- .start = 0x0020,
+- .end = 0x0021,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "timer0",
+- .start = 0x0040,
+- .end = 0x0043,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "timer1",
+- .start = 0x0050,
+- .end = 0x0053,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "keyboard",
+- .start = 0x0060,
+- .end = 0x0060,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "keyboard",
+- .start = 0x0064,
+- .end = 0x0064,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "dma page reg",
+- .start = 0x0080,
+- .end = 0x008f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "pic2",
+- .start = 0x00a0,
+- .end = 0x00a1,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "dma2",
+- .start = 0x00c0,
+- .end = 0x00df,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-}, {
+- .name = "fpu",
+- .start = 0x00f0,
+- .end = 0x00ff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO
+-} };
+-
+-/* cpu data as detected by the assembly code in head.S */
+-struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
+-/* common cpu data for all cpus */
+-struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
+-EXPORT_SYMBOL(boot_cpu_data);
+-
+-unsigned int def_to_bigsmp;
+-
+-#ifndef CONFIG_X86_PAE
+-unsigned long mmu_cr4_features;
+-#else
+-unsigned long mmu_cr4_features = X86_CR4_PAE;
+-#endif
+-
+-/* for MCA, but anyone else can use it if they want */
+-unsigned int machine_id;
+-unsigned int machine_submodel_id;
+-unsigned int BIOS_revision;
+-
+-/* Boot loader ID as an integer, for the benefit of proc_dointvec */
+-int bootloader_type;
+-
+-/* user-defined highmem size */
+-static unsigned int highmem_pages = -1;
+-
+-/*
+- * Setup options
+- */
+-struct screen_info screen_info;
+-EXPORT_SYMBOL(screen_info);
+-struct apm_info apm_info;
+-EXPORT_SYMBOL(apm_info);
+-struct edid_info edid_info;
+-EXPORT_SYMBOL_GPL(edid_info);
+-#ifndef CONFIG_XEN
+-#define copy_edid() (edid_info = boot_params.edid_info)
+-#endif
+-struct ist_info ist_info;
+-#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
+- defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
+-EXPORT_SYMBOL(ist_info);
+-#endif
+-
+-extern void early_cpu_init(void);
+-extern int root_mountflags;
+-
+-unsigned long saved_video_mode;
+-
+-#define RAMDISK_IMAGE_START_MASK 0x07FF
+-#define RAMDISK_PROMPT_FLAG 0x8000
+-#define RAMDISK_LOAD_FLAG 0x4000
+-
+-static char __initdata command_line[COMMAND_LINE_SIZE];
+-
+-#ifndef CONFIG_DEBUG_BOOT_PARAMS
+-struct boot_params __initdata boot_params;
+-#else
+-struct boot_params boot_params;
+-#endif
+-
+-/*
+- * Point at the empty zero page to start with. We map the real shared_info
+- * page as soon as fixmap is up and running.
+- */
+-shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
+-EXPORT_SYMBOL(HYPERVISOR_shared_info);
+-
+-unsigned long *phys_to_machine_mapping;
+-unsigned long *pfn_to_mfn_frame_list_list, *pfn_to_mfn_frame_list[16];
+-EXPORT_SYMBOL(phys_to_machine_mapping);
+-
+-/* Raw start-of-day parameters from the hypervisor. */
+-start_info_t *xen_start_info;
+-EXPORT_SYMBOL(xen_start_info);
+-
+-#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
+-struct edd edd;
+-#ifdef CONFIG_EDD_MODULE
+-EXPORT_SYMBOL(edd);
+-#endif
+-#ifndef CONFIG_XEN
+-/**
+- * copy_edd() - Copy the BIOS EDD information
+- * from boot_params into a safe place.
+- *
+- */
+-static inline void copy_edd(void)
+-{
+- memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
+- sizeof(edd.mbr_signature));
+- memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
+- edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
+- edd.edd_info_nr = boot_params.eddbuf_entries;
+-}
+-#endif
+-#else
+-static inline void copy_edd(void)
+-{
+-}
+-#endif
+-
+-int __initdata user_defined_memmap;
+-
+-/*
+- * "mem=nopentium" disables the 4MB page tables.
+- * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
+- * to <mem>, overriding the bios size.
+- * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
+- * <start> to <start>+<mem>, overriding the bios size.
+- *
+- * HPA tells me bootloaders need to parse mem=, so no new
+- * option should be mem= [also see Documentation/i386/boot.txt]
+- */
+-static int __init parse_mem(char *arg)
+-{
+- if (!arg)
+- return -EINVAL;
+-
+- if (strcmp(arg, "nopentium") == 0) {
+- setup_clear_cpu_cap(X86_FEATURE_PSE);
+- } else {
+- /* If the user specifies memory size, we
+- * limit the BIOS-provided memory map to
+- * that size. exactmap can be used to specify
+- * the exact map. mem=number can be used to
+- * trim the existing memory map.
+- */
+- unsigned long long mem_size;
+-
+- mem_size = memparse(arg, &arg);
+- limit_regions(mem_size);
+- user_defined_memmap = 1;
+- }
+- return 0;
+-}
+-early_param("mem", parse_mem);
+-
+-#ifdef CONFIG_PROC_VMCORE
+-/* elfcorehdr= specifies the location of elf core header
+- * stored by the crashed kernel.
+- */
+-static int __init parse_elfcorehdr(char *arg)
+-{
+- if (!arg)
+- return -EINVAL;
+-
+- elfcorehdr_addr = memparse(arg, &arg);
+- return 0;
+-}
+-early_param("elfcorehdr", parse_elfcorehdr);
+-#endif /* CONFIG_PROC_VMCORE */
+-
+-/*
+- * highmem=size forces highmem to be exactly 'size' bytes.
+- * This works even on boxes that have no highmem otherwise.
+- * This also works to reduce highmem size on bigger boxes.
+- */
+-static int __init parse_highmem(char *arg)
+-{
+- if (!arg)
+- return -EINVAL;
+-
+- highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
+- return 0;
+-}
+-early_param("highmem", parse_highmem);
+-
+-/*
+- * vmalloc=size forces the vmalloc area to be exactly 'size'
+- * bytes. This can be used to increase (or decrease) the
+- * vmalloc area - the default is 128m.
+- */
+-static int __init parse_vmalloc(char *arg)
+-{
+- if (!arg)
+- return -EINVAL;
+-
+- __VMALLOC_RESERVE = memparse(arg, &arg);
+- return 0;
+-}
+-early_param("vmalloc", parse_vmalloc);
+-
+-#ifndef CONFIG_XEN
+-/*
+- * reservetop=size reserves a hole at the top of the kernel address space which
+- * a hypervisor can load into later. Needed for dynamically loaded hypervisors,
+- * so relocating the fixmap can be done before paging initialization.
+- */
+-static int __init parse_reservetop(char *arg)
+-{
+- unsigned long address;
+-
+- if (!arg)
+- return -EINVAL;
+-
+- address = memparse(arg, &arg);
+- reserve_top_address(address);
+- return 0;
+-}
+-early_param("reservetop", parse_reservetop);
+-#endif
+-
+-/*
+- * Determine low and high memory ranges:
+- */
+-unsigned long __init find_max_low_pfn(void)
+-{
+- unsigned long max_low_pfn;
+-
+- max_low_pfn = max_pfn;
+- if (max_low_pfn > MAXMEM_PFN) {
+- if (highmem_pages == -1)
+- highmem_pages = max_pfn - MAXMEM_PFN;
+- if (highmem_pages + MAXMEM_PFN < max_pfn)
+- max_pfn = MAXMEM_PFN + highmem_pages;
+- if (highmem_pages + MAXMEM_PFN > max_pfn) {
+- printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
+- highmem_pages = 0;
+- }
+- max_low_pfn = MAXMEM_PFN;
+-#ifndef CONFIG_HIGHMEM
+- /* Maximum memory usable is what is directly addressable */
+- printk(KERN_WARNING "Warning only %ldMB will be used.\n",
+- MAXMEM>>20);
+- if (max_pfn > MAX_NONPAE_PFN)
+- printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
+- else
+- printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
+- max_pfn = MAXMEM_PFN;
+-#else /* !CONFIG_HIGHMEM */
+-#ifndef CONFIG_HIGHMEM64G
+- if (max_pfn > MAX_NONPAE_PFN) {
+- max_pfn = MAX_NONPAE_PFN;
+- printk(KERN_WARNING "Warning only 4GB will be used.\n");
+- printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
+- }
+-#endif /* !CONFIG_HIGHMEM64G */
+-#endif /* !CONFIG_HIGHMEM */
+- } else {
+- if (highmem_pages == -1)
+- highmem_pages = 0;
+-#ifdef CONFIG_HIGHMEM
+- if (highmem_pages >= max_pfn) {
+- printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
+- highmem_pages = 0;
+- }
+- if (highmem_pages) {
+- if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
+- printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
+- highmem_pages = 0;
+- }
+- max_low_pfn -= highmem_pages;
+- }
+-#else
+- if (highmem_pages)
+- printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
+-#endif
+- }
+- return max_low_pfn;
+-}
+-
+-#ifndef CONFIG_XEN
+-#define BIOS_LOWMEM_KILOBYTES 0x413
+-
+-/*
+- * The BIOS places the EBDA/XBDA at the top of conventional
+- * memory, and usually decreases the reported amount of
+- * conventional memory (int 0x12) too. This also contains a
+- * workaround for Dell systems that neglect to reserve EBDA.
+- * The same workaround also avoids a problem with the AMD768MPX
+- * chipset: reserve a page before VGA to prevent PCI prefetch
+- * into it (errata #56). Usually the page is reserved anyways,
+- * unless you have no PS/2 mouse plugged in.
+- */
+-static void __init reserve_ebda_region(void)
+-{
+- unsigned int lowmem, ebda_addr;
+-
+- /* To determine the position of the EBDA and the */
+- /* end of conventional memory, we need to look at */
+- /* the BIOS data area. In a paravirtual environment */
+- /* that area is absent. We'll just have to assume */
+- /* that the paravirt case can handle memory setup */
+- /* correctly, without our help. */
+- if (paravirt_enabled())
+- return;
+-
+- /* end of low (conventional) memory */
+- lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES);
+- lowmem <<= 10;
+-
+- /* start of EBDA area */
+- ebda_addr = get_bios_ebda();
+-
+- /* Fixup: bios puts an EBDA in the top 64K segment */
+- /* of conventional memory, but does not adjust lowmem. */
+- if ((lowmem - ebda_addr) <= 0x10000)
+- lowmem = ebda_addr;
+-
+- /* Fixup: bios does not report an EBDA at all. */
+- /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */
+- if ((ebda_addr == 0) && (lowmem >= 0x9f000))
+- lowmem = 0x9f000;
+-
+- /* Paranoia: should never happen, but... */
+- if ((lowmem == 0) || (lowmem >= 0x100000))
+- lowmem = 0x9f000;
+-
+- /* reserve all memory between lowmem and the 1MB mark */
+- reserve_bootmem(lowmem, 0x100000 - lowmem, BOOTMEM_DEFAULT);
+-}
+-#endif
+-
+-#ifndef CONFIG_NEED_MULTIPLE_NODES
+-static void __init setup_bootmem_allocator(void);
+-static unsigned long __init setup_memory(void)
+-{
+- /*
+- * partially used pages are not usable - thus
+- * we are rounding upwards:
+- */
+- min_low_pfn = PFN_UP(__pa(xen_start_info->pt_base)) +
+- xen_start_info->nr_pt_frames;
+-
+- max_low_pfn = find_max_low_pfn();
+-
+-#ifdef CONFIG_HIGHMEM
+- highstart_pfn = highend_pfn = max_pfn;
+- if (max_pfn > max_low_pfn) {
+- highstart_pfn = max_low_pfn;
+- }
+- printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
+- pages_to_mb(highend_pfn - highstart_pfn));
+- num_physpages = highend_pfn;
+- high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
+-#else
+- num_physpages = max_low_pfn;
+- high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
+-#endif
+-#ifdef CONFIG_FLATMEM
+- max_mapnr = num_physpages;
+-#endif
+- printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
+- pages_to_mb(max_low_pfn));
+-
+- setup_bootmem_allocator();
+-
+- return max_low_pfn;
+-}
+-
+-static void __init zone_sizes_init(void)
+-{
+- unsigned long max_zone_pfns[MAX_NR_ZONES];
+- memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+- max_zone_pfns[ZONE_DMA] =
+- virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+- max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+-#ifdef CONFIG_HIGHMEM
+- max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
+- add_active_range(0, 0, highend_pfn);
+-#else
+- add_active_range(0, 0, max_low_pfn);
+-#endif
+-
+- free_area_init_nodes(max_zone_pfns);
+-}
+-#else
+-extern unsigned long __init setup_memory(void);
+-extern void zone_sizes_init(void);
+-#endif /* !CONFIG_NEED_MULTIPLE_NODES */
+-
+-static inline unsigned long long get_total_mem(void)
+-{
+- unsigned long long total;
+-
+- total = max_low_pfn - min_low_pfn;
+-#ifdef CONFIG_HIGHMEM
+- total += highend_pfn - highstart_pfn;
+-#endif
+-
+- return total << PAGE_SHIFT;
+-}
+-
+-#ifdef CONFIG_KEXEC
+-#ifndef CONFIG_XEN
+-static void __init reserve_crashkernel(void)
+-{
+- unsigned long long total_mem;
+- unsigned long long crash_size, crash_base;
+- int ret;
+-
+- total_mem = get_total_mem();
+-
+- ret = parse_crashkernel(boot_command_line, total_mem,
+- &crash_size, &crash_base);
+- if (ret == 0 && crash_size > 0) {
+- if (crash_base > 0) {
+- printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
+- "for crashkernel (System RAM: %ldMB)\n",
+- (unsigned long)(crash_size >> 20),
+- (unsigned long)(crash_base >> 20),
+- (unsigned long)(total_mem >> 20));
+-
+- if (reserve_bootmem(crash_base, crash_size,
+- BOOTMEM_EXCLUSIVE) < 0) {
+- printk(KERN_INFO "crashkernel reservation "
+- "failed - memory is in use\n");
+- return;
+- }
+-
+- crashk_res.start = crash_base;
+- crashk_res.end = crash_base + crash_size - 1;
+- } else
+- printk(KERN_INFO "crashkernel reservation failed - "
+- "you have to specify a base address\n");
+- }
+-}
+-#else
+-#define reserve_crashkernel xen_machine_kexec_setup_resources
+-#endif
+-#else
+-static inline void __init reserve_crashkernel(void)
+-{}
+-#endif
+-
+-#ifdef CONFIG_BLK_DEV_INITRD
+-
+-static bool do_relocate_initrd = false;
+-
+-static void __init reserve_initrd(void)
+-{
+- unsigned long ramdisk_image = __pa(xen_start_info->mod_start);
+- unsigned long ramdisk_size = xen_start_info->mod_len;
+- unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
+- unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
+- unsigned long ramdisk_here;
+-
+- initrd_start = 0;
+-
+- if (!xen_start_info->mod_start || !ramdisk_size)
+- return; /* No initrd provided by bootloader */
+-
+- if (ramdisk_end < ramdisk_image) {
+- printk(KERN_ERR "initrd wraps around end of memory, "
+- "disabling initrd\n");
+- return;
+- }
+- if (ramdisk_size >= end_of_lowmem/2) {
+- printk(KERN_ERR "initrd too large to handle, "
+- "disabling initrd\n");
+- return;
+- }
+- if (ramdisk_end <= end_of_lowmem) {
+- /* All in lowmem, easy case */
+- reserve_bootmem(ramdisk_image, ramdisk_size, BOOTMEM_DEFAULT);
+- initrd_start = ramdisk_image + PAGE_OFFSET;
+- initrd_end = initrd_start+ramdisk_size;
+- return;
+- }
+-
+- /* We need to move the initrd down into lowmem */
+- ramdisk_here = (end_of_lowmem - ramdisk_size) & PAGE_MASK;
+-
+- /* Note: this includes all the lowmem currently occupied by
+- the initrd, we rely on that fact to keep the data intact. */
+- reserve_bootmem(ramdisk_here, ramdisk_size, BOOTMEM_DEFAULT);
+- initrd_start = ramdisk_here + PAGE_OFFSET;
+- initrd_end = initrd_start + ramdisk_size;
+-
+- do_relocate_initrd = true;
+-}
+-
+-#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
+-
+-static void __init relocate_initrd(void)
+-{
+- unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
+- unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
+- unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
+- unsigned long ramdisk_here;
+- unsigned long slop, clen, mapaddr;
+- char *p, *q;
+-
+- if (!do_relocate_initrd)
+- return;
+-
+- ramdisk_here = initrd_start - PAGE_OFFSET;
+-
+- q = (char *)initrd_start;
+-
+- /* Copy any lowmem portion of the initrd */
+- if (ramdisk_image < end_of_lowmem) {
+- clen = end_of_lowmem - ramdisk_image;
+- p = (char *)__va(ramdisk_image);
+- memcpy(q, p, clen);
+- q += clen;
+- ramdisk_image += clen;
+- ramdisk_size -= clen;
+- }
+-
+- /* Copy the highmem portion of the initrd */
+- while (ramdisk_size) {
+- slop = ramdisk_image & ~PAGE_MASK;
+- clen = ramdisk_size;
+- if (clen > MAX_MAP_CHUNK-slop)
+- clen = MAX_MAP_CHUNK-slop;
+- mapaddr = ramdisk_image & PAGE_MASK;
+- p = early_ioremap(mapaddr, clen+slop);
+- memcpy(q, p+slop, clen);
+- early_iounmap(p, clen+slop);
+- q += clen;
+- ramdisk_image += clen;
+- ramdisk_size -= clen;
+- }
+-}
+-
+-#endif /* CONFIG_BLK_DEV_INITRD */
+-
+-void __init setup_bootmem_allocator(void)
+-{
+- unsigned long bootmap_size;
+- /*
+- * Initialize the boot-time allocator (with low memory only):
+- */
+- bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
+-
+- register_bootmem_low_pages(max_low_pfn);
+-
+- /*
+- * Reserve the bootmem bitmap itself as well. We do this in two
+- * steps (first step was init_bootmem()) because this catches
+- * the (very unlikely) case of us accidentally initializing the
+- * bootmem allocator with an invalid RAM area.
+- */
+- reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
+- bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text),
+- BOOTMEM_DEFAULT);
+-
+-#ifndef CONFIG_XEN
+- /*
+- * reserve physical page 0 - it's a special BIOS page on many boxes,
+- * enabling clean reboots, SMP operation, laptop functions.
+- */
+- reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT);
+-
+- /* reserve EBDA region */
+- reserve_ebda_region();
+-
+-#ifdef CONFIG_SMP
+- /*
+- * But first pinch a few for the stack/trampoline stuff
+- * FIXME: Don't need the extra page at 4K, but need to fix
+- * trampoline before removing it. (see the GDT stuff)
+- */
+- reserve_bootmem(PAGE_SIZE, PAGE_SIZE, BOOTMEM_DEFAULT);
+-#endif
+-#ifdef CONFIG_ACPI_SLEEP
+- /*
+- * Reserve low memory region for sleep support.
+- */
+- acpi_reserve_bootmem();
+-#endif
+-#endif /* !CONFIG_XEN */
+-
+-#ifdef CONFIG_BLK_DEV_INITRD
+- reserve_initrd();
+-#endif
+- numa_kva_reserve();
+- reserve_crashkernel();
+-
+- reserve_ibft_region();
+-}
+-
+-/*
+- * The node 0 pgdat is initialized before all of these because
+- * it's needed for bootmem. node>0 pgdats have their virtual
+- * space allocated before the pagetables are in place to access
+- * them, so they can't be cleared then.
+- *
+- * This should all compile down to nothing when NUMA is off.
+- */
+-static void __init remapped_pgdat_init(void)
+-{
+- int nid;
+-
+- for_each_online_node(nid) {
+- if (nid != 0)
+- memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
+- }
+-}
+-
+-#ifdef CONFIG_MCA
+-static void set_mca_bus(int x)
+-{
+- MCA_bus = x;
+-}
+-#else
+-static void set_mca_bus(int x) { }
+-#endif
+-
+-/* Overridden in paravirt.c if CONFIG_PARAVIRT */
+-char * __init __attribute__((weak)) memory_setup(void)
+-{
+- return machine_specific_memory_setup();
+-}
+-
+-#ifdef CONFIG_NUMA
+-/*
+- * In the golden day, when everything among i386 and x86_64 will be
+- * integrated, this will not live here
+- */
+-void *x86_cpu_to_node_map_early_ptr;
+-int x86_cpu_to_node_map_init[NR_CPUS] = {
+- [0 ... NR_CPUS-1] = NUMA_NO_NODE
+-};
+-DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE;
+-#endif
+-
+-/*
+- * Determine if we were loaded by an EFI loader. If so, then we have also been
+- * passed the efi memmap, systab, etc., so we should use these data structures
+- * for initialization. Note, the efi init code path is determined by the
+- * global efi_enabled. This allows the same kernel image to be used on existing
+- * systems (with a traditional BIOS) as well as on EFI systems.
+- */
+-void __init setup_arch(char **cmdline_p)
+-{
+- int i, j, k, fpp;
+- struct physdev_set_iopl set_iopl;
+- unsigned long max_low_pfn;
+- unsigned long p2m_pages;
+-
+- /* Force a quick death if the kernel panics (not domain 0). */
+- extern int panic_timeout;
+- if (!panic_timeout && !is_initial_xendomain())
+- panic_timeout = 1;
+-
+- /* Register a call for panic conditions. */
+- atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+-
+- WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
+- VMASST_TYPE_4gb_segments));
+- WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
+- VMASST_TYPE_writable_pagetables));
+-
+- memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
+- pre_setup_arch_hook();
+- early_cpu_init();
+- early_ioremap_init();
+-#ifdef CONFIG_SMP
+- prefill_possible_map();
+-#endif
+-
+-#ifdef CONFIG_EFI
+- if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
+- "EL32", 4))
+- efi_enabled = 1;
+-#endif
+-
+- /* This must be initialized to UNNAMED_MAJOR for ipconfig to work
+- properly. Setting ROOT_DEV to default to /dev/ram0 breaks initrd.
+- */
+- ROOT_DEV = MKDEV(UNNAMED_MAJOR,0);
+- screen_info = boot_params.screen_info;
+- copy_edid();
+- apm_info.bios = boot_params.apm_bios_info;
+- ist_info = boot_params.ist_info;
+- saved_video_mode = boot_params.hdr.vid_mode;
+- if( boot_params.sys_desc_table.length != 0 ) {
+- set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
+- machine_id = boot_params.sys_desc_table.table[0];
+- machine_submodel_id = boot_params.sys_desc_table.table[1];
+- BIOS_revision = boot_params.sys_desc_table.table[2];
+- }
+- bootloader_type = boot_params.hdr.type_of_loader;
+-
+- if (is_initial_xendomain()) {
+- const struct dom0_vga_console_info *info =
+- (void *)((char *)xen_start_info +
+- xen_start_info->console.dom0.info_off);
+-
+- dom0_init_screen_info(info,
+- xen_start_info->console.dom0.info_size);
+- xen_start_info->console.domU.mfn = 0;
+- xen_start_info->console.domU.evtchn = 0;
+- } else
+- screen_info.orig_video_isVGA = 0;
+-
+-#ifdef CONFIG_BLK_DEV_RAM
+- rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
+- rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
+- rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
+-#endif
+-
+- ARCH_SETUP
+-
+- printk(KERN_INFO "BIOS-provided physical RAM map:\n");
+- print_memory_map(memory_setup());
+-
+- copy_edd();
+-
+- if (!boot_params.hdr.root_flags)
+- root_mountflags &= ~MS_RDONLY;
+- init_mm.start_code = (unsigned long) _text;
+- init_mm.end_code = (unsigned long) _etext;
+- init_mm.end_data = (unsigned long) _edata;
+- init_mm.brk = (PFN_UP(__pa(xen_start_info->pt_base)) +
+- xen_start_info->nr_pt_frames) << PAGE_SHIFT;
+-
+- code_resource.start = virt_to_phys(_text);
+- code_resource.end = virt_to_phys(_etext)-1;
+- data_resource.start = virt_to_phys(_etext);
+- data_resource.end = virt_to_phys(_edata)-1;
+- bss_resource.start = virt_to_phys(&__bss_start);
+- bss_resource.end = virt_to_phys(&__bss_stop)-1;
+-
+- if ((i = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
+- i = COMMAND_LINE_SIZE;
+- memcpy(boot_command_line, xen_start_info->cmd_line, i);
+- boot_command_line[i - 1] = '\0';
+- parse_early_param();
+-
+- if (user_defined_memmap) {
+- printk(KERN_INFO "user-defined physical RAM map:\n");
+- print_memory_map("user");
+- }
+-
+- strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+- *cmdline_p = command_line;
+-
+- if (efi_enabled)
+- efi_init();
+-
+- /* update e820 for memory not covered by WB MTRRs */
+- propagate_e820_map();
+- mtrr_bp_init();
+-#ifndef CONFIG_XEN
+- if (mtrr_trim_uncached_memory(max_pfn))
+- propagate_e820_map();
+-#endif
+-
+- max_low_pfn = setup_memory();
+-
+-#ifdef CONFIG_KVM_CLOCK
+- kvmclock_init();
+-#endif
+-
+-#ifdef CONFIG_VMI
+- /*
+- * Must be after max_low_pfn is determined, and before kernel
+- * pagetables are setup.
+- */
+- vmi_init();
+-#endif
+- kvm_guest_init();
+-
+- /*
+- * NOTE: before this point _nobody_ is allowed to allocate
+- * any memory using the bootmem allocator. Although the
+- * allocator is now initialised only the first 8Mb of the kernel
+- * virtual address space has been mapped. All allocations before
+- * paging_init() has completed must use the alloc_bootmem_low_pages()
+- * variant (which allocates DMA'able memory) and care must be taken
+- * not to exceed the 8Mb limit.
+- */
+-
+-#ifdef CONFIG_SMP
+- smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
+-#endif
+- paging_init();
+-
+- /*
+- * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
+- */
+-
+-#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
+- if (init_ohci1394_dma_early)
+- init_ohci1394_dma_on_all_controllers();
+-#endif
+-
+- remapped_pgdat_init();
+- sparse_init();
+- zone_sizes_init();
+-
+-#ifdef CONFIG_X86_FIND_SMP_CONFIG
+- /*
+- * Find and reserve possible boot-time SMP configuration:
+- */
+- find_smp_config();
+-#endif
+-
+- p2m_pages = max_pfn;
+- if (xen_start_info->nr_pages > max_pfn) {
+- /*
+- * the max_pfn was shrunk (probably by mem= or highmem=
+- * kernel parameter); shrink reservation with the HV
+- */
+- struct xen_memory_reservation reservation = {
+- .address_bits = 0,
+- .extent_order = 0,
+- .domid = DOMID_SELF
+- };
+- unsigned int difference;
+- int ret;
+-
+- difference = xen_start_info->nr_pages - max_pfn;
+-
+- set_xen_guest_handle(reservation.extent_start,
+- ((unsigned long *)xen_start_info->mfn_list) + max_pfn);
+- reservation.nr_extents = difference;
+- ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
+- &reservation);
+- BUG_ON (ret != difference);
+- }
+- else if (max_pfn > xen_start_info->nr_pages)
+- p2m_pages = xen_start_info->nr_pages;
+-
+- /* Make sure we have a correctly sized P->M table. */
+- if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+- phys_to_machine_mapping = alloc_bootmem_low_pages(
+- max_pfn * sizeof(unsigned long));
+- memset(phys_to_machine_mapping, ~0,
+- max_pfn * sizeof(unsigned long));
+- memcpy(phys_to_machine_mapping,
+- (unsigned long *)xen_start_info->mfn_list,
+- p2m_pages * sizeof(unsigned long));
+- free_bootmem(
+- __pa(xen_start_info->mfn_list),
+- PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
+- sizeof(unsigned long))));
+-
+- /*
+- * Initialise the list of the frames that specify the list of
+- * frames that make up the p2m table. Used by save/restore
+- */
+- pfn_to_mfn_frame_list_list = alloc_bootmem_low_pages(PAGE_SIZE);
+-
+- fpp = PAGE_SIZE/sizeof(unsigned long);
+- for (i=0, j=0, k=-1; i< max_pfn; i+=fpp, j++) {
+- if ((j % fpp) == 0) {
+- k++;
+- BUG_ON(k>=16);
+- pfn_to_mfn_frame_list[k] =
+- alloc_bootmem_low_pages(PAGE_SIZE);
+- pfn_to_mfn_frame_list_list[k] =
+- virt_to_mfn(pfn_to_mfn_frame_list[k]);
+- j=0;
+- }
+- pfn_to_mfn_frame_list[k][j] =
+- virt_to_mfn(&phys_to_machine_mapping[i]);
+- }
+- HYPERVISOR_shared_info->arch.max_pfn = max_pfn;
+- HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
+- virt_to_mfn(pfn_to_mfn_frame_list_list);
+- }
+-
+- /* Mark all ISA DMA channels in-use - using them wouldn't work. */
+- for (i = 0; i < MAX_DMA_CHANNELS; ++i)
+- if (i != 4 && request_dma(i, "xen") != 0)
+- BUG();
+-
+- /*
+- * NOTE: at this point the bootmem allocator is fully available.
+- */
+-
+-#ifdef CONFIG_BLK_DEV_INITRD
+- relocate_initrd();
+-#endif
+-
+- paravirt_post_allocator_init();
+-
+- if (is_initial_xendomain())
+- dmi_scan_machine();
+-
+- io_delay_init();
+-
+-#if defined(CONFIG_X86_SMP) && !defined(CONFIG_XEN)
+- /*
+- * setup to use the early static init tables during kernel startup
+- * X86_SMP will exclude sub-arches that don't deal well with it.
+- */
+- x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
+- x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init;
+-#ifdef CONFIG_NUMA
+- x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init;
+-#endif
+-#endif
+-
+-#ifdef CONFIG_X86_GENERICARCH
+- generic_apic_probe();
+-#endif
+-
+- set_iopl.iopl = 1;
+- WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
+-
+-#ifdef CONFIG_ACPI
+- if (!is_initial_xendomain()) {
+- printk(KERN_INFO "ACPI in unprivileged domain disabled\n");
+- acpi_disabled = 1;
+- acpi_ht = 0;
+- }
+-
+- /*
+- * Parse the ACPI tables for possible boot-time SMP configuration.
+- */
+- acpi_boot_table_init();
+-#endif
+-
+-#ifndef CONFIG_XEN
+- early_quirks();
+-#endif
+-
+-#ifdef CONFIG_ACPI
+- acpi_boot_init();
+-
+-#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
+- if (def_to_bigsmp)
+- printk(KERN_WARNING "More than 8 CPUs detected and "
+- "CONFIG_X86_PC cannot handle it.\nUse "
+- "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
+-#endif
+-#endif
+-#ifdef CONFIG_X86_LOCAL_APIC
+- if (smp_found_config)
+- get_smp_config();
+-#endif
+-
+- e820_register_memory();
+- e820_mark_nosave_regions();
+-
+- if (is_initial_xendomain()) {
+-#ifdef CONFIG_VT
+-#if defined(CONFIG_VGA_CONSOLE)
+- if (!efi_enabled ||
+- (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
+- conswitchp = &vga_con;
+-#elif defined(CONFIG_DUMMY_CONSOLE)
+- conswitchp = &dummy_con;
+-#endif
+-#endif
+- } else {
+-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
+- conswitchp = &dummy_con;
+-#endif
+- }
+-}
+-
+-static int
+-xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
+-{
+- HYPERVISOR_shutdown(SHUTDOWN_crash);
+- /* we're never actually going to get here... */
+- return NOTIFY_DONE;
+-}
+-
+-/*
+- * Request address space for all standard resources
+- *
+- * This is called just before pcibios_init(), which is also a
+- * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
+- */
+-static int __init request_standard_resources(void)
+-{
+- int i;
+-
+- /* Nothing to do if not running in dom0. */
+- if (!is_initial_xendomain())
+- return 0;
+-
+- printk(KERN_INFO "Setting up standard PCI resources\n");
+- init_iomem_resources(&code_resource, &data_resource, &bss_resource);
+-
+- request_resource(&iomem_resource, &video_ram_resource);
+-
+- /* request I/O space for devices used on all i[345]86 PCs */
+- for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+- request_resource(&ioport_resource, &standard_io_resources[i]);
+- return 0;
+-}
+-
+-subsys_initcall(request_standard_resources);
+Index: head-2008-12-01/arch/x86/kernel/setup_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/setup_64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,1433 +0,0 @@
+-/*
+- * Copyright (C) 1995 Linus Torvalds
+- */
+-
+-/*
+- * This file handles the architecture-dependent parts of initialization
+- */
+-
+-#include <linux/errno.h>
+-#include <linux/sched.h>
+-#include <linux/kernel.h>
+-#include <linux/mm.h>
+-#include <linux/stddef.h>
+-#include <linux/unistd.h>
+-#include <linux/ptrace.h>
+-#include <linux/slab.h>
+-#include <linux/user.h>
+-#include <linux/screen_info.h>
+-#include <linux/ioport.h>
+-#include <linux/delay.h>
+-#include <linux/init.h>
+-#include <linux/initrd.h>
+-#include <linux/highmem.h>
+-#include <linux/bootmem.h>
+-#include <linux/module.h>
+-#include <asm/processor.h>
+-#include <linux/console.h>
+-#include <linux/seq_file.h>
+-#include <linux/crash_dump.h>
+-#include <linux/root_dev.h>
+-#include <linux/pci.h>
+-#include <asm/pci-direct.h>
+-#include <linux/efi.h>
+-#include <linux/acpi.h>
+-#include <linux/kallsyms.h>
+-#include <linux/edd.h>
+-#include <linux/iscsi_ibft.h>
+-#include <linux/mmzone.h>
+-#include <linux/kexec.h>
+-#include <linux/cpufreq.h>
+-#include <linux/dmi.h>
+-#include <linux/dma-mapping.h>
+-#include <linux/ctype.h>
+-#include <linux/sort.h>
+-#include <linux/uaccess.h>
+-#include <linux/init_ohci1394_dma.h>
+-#include <linux/kvm_para.h>
+-
+-#include <asm/mtrr.h>
+-#include <asm/uaccess.h>
+-#include <asm/system.h>
+-#include <asm/vsyscall.h>
+-#include <asm/io.h>
+-#include <asm/smp.h>
+-#include <asm/msr.h>
+-#include <asm/desc.h>
+-#include <video/edid.h>
+-#include <asm/e820.h>
+-#include <asm/dma.h>
+-#include <asm/gart.h>
+-#include <asm/mpspec.h>
+-#include <asm/mmu_context.h>
+-#include <asm/proto.h>
+-#include <asm/setup.h>
+-#include <asm/numa.h>
+-#include <asm/sections.h>
+-#include <asm/dmi.h>
+-#include <asm/cacheflush.h>
+-#include <asm/mce.h>
+-#include <asm/ds.h>
+-#include <asm/topology.h>
+-#include <asm/pat.h>
+-
+-#include <mach_apic.h>
+-#ifdef CONFIG_XEN
+-#include <linux/percpu.h>
+-#include <xen/interface/physdev.h>
+-#include "setup_arch_pre.h"
+-#include <asm/hypervisor.h>
+-#include <xen/interface/nmi.h>
+-#include <xen/features.h>
+-#include <xen/firmware.h>
+-#include <xen/xencons.h>
+-#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
+-#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
+-#include <asm/mach-xen/setup_arch_post.h>
+-#include <xen/interface/memory.h>
+-
+-#ifdef CONFIG_XEN
+-#include <xen/interface/kexec.h>
+-#endif
+-
+-extern unsigned long start_pfn;
+-extern struct edid_info edid_info;
+-
+-shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
+-EXPORT_SYMBOL(HYPERVISOR_shared_info);
+-
+-static int xen_panic_event(struct notifier_block *, unsigned long, void *);
+-static struct notifier_block xen_panic_block = {
+- xen_panic_event, NULL, 0 /* try to go last */
+-};
+-
+-unsigned long *phys_to_machine_mapping;
+-unsigned long *pfn_to_mfn_frame_list_list, *pfn_to_mfn_frame_list[512];
+-
+-EXPORT_SYMBOL(phys_to_machine_mapping);
+-
+-DEFINE_PER_CPU(multicall_entry_t, multicall_list[8]);
+-DEFINE_PER_CPU(int, nr_multicall_ents);
+-
+-/* Raw start-of-day parameters from the hypervisor. */
+-start_info_t *xen_start_info;
+-EXPORT_SYMBOL(xen_start_info);
+-#endif
+-
+-/*
+- * Machine setup..
+- */
+-
+-struct cpuinfo_x86 boot_cpu_data __read_mostly;
+-EXPORT_SYMBOL(boot_cpu_data);
+-
+-__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
+-
+-unsigned long mmu_cr4_features;
+-
+-/* Boot loader ID as an integer, for the benefit of proc_dointvec */
+-int bootloader_type;
+-
+-unsigned long saved_video_mode;
+-
+-int force_mwait __cpuinitdata;
+-
+-/*
+- * Early DMI memory
+- */
+-int dmi_alloc_index;
+-char dmi_alloc_data[DMI_MAX_DATA];
+-
+-/*
+- * Setup options
+- */
+-struct screen_info screen_info;
+-EXPORT_SYMBOL(screen_info);
+-struct sys_desc_table_struct {
+- unsigned short length;
+- unsigned char table[0];
+-};
+-
+-struct edid_info edid_info;
+-EXPORT_SYMBOL_GPL(edid_info);
+-
+-extern int root_mountflags;
+-
+-char __initdata command_line[COMMAND_LINE_SIZE];
+-
+-static struct resource standard_io_resources[] = {
+- { .name = "dma1", .start = 0x00, .end = 0x1f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "pic1", .start = 0x20, .end = 0x21,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "timer0", .start = 0x40, .end = 0x43,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "timer1", .start = 0x50, .end = 0x53,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "keyboard", .start = 0x60, .end = 0x60,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "keyboard", .start = 0x64, .end = 0x64,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "dma page reg", .start = 0x80, .end = 0x8f,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "pic2", .start = 0xa0, .end = 0xa1,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "dma2", .start = 0xc0, .end = 0xdf,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO },
+- { .name = "fpu", .start = 0xf0, .end = 0xff,
+- .flags = IORESOURCE_BUSY | IORESOURCE_IO }
+-};
+-
+-#define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
+-
+-static struct resource data_resource = {
+- .name = "Kernel data",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_RAM,
+-};
+-static struct resource code_resource = {
+- .name = "Kernel code",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_RAM,
+-};
+-static struct resource bss_resource = {
+- .name = "Kernel bss",
+- .start = 0,
+- .end = 0,
+- .flags = IORESOURCE_RAM,
+-};
+-
+-static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
+-
+-#ifdef CONFIG_PROC_VMCORE
+-/* elfcorehdr= specifies the location of elf core header
+- * stored by the crashed kernel. This option will be passed
+- * by kexec loader to the capture kernel.
+- */
+-static int __init setup_elfcorehdr(char *arg)
+-{
+- char *end;
+- if (!arg)
+- return -EINVAL;
+- elfcorehdr_addr = memparse(arg, &end);
+- return end > arg ? 0 : -EINVAL;
+-}
+-early_param("elfcorehdr", setup_elfcorehdr);
+-#endif
+-
+-#ifndef CONFIG_NUMA
+-static void __init
+-contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
+-{
+- unsigned long bootmap_size, bootmap;
+-
+- bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
+- bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
+- PAGE_SIZE);
+- if (bootmap == -1L)
+- panic("Cannot find bootmem map of size %ld\n", bootmap_size);
+- bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
+- e820_register_active_regions(0, start_pfn, end_pfn);
+-#ifdef CONFIG_XEN
+- free_bootmem_with_active_regions(0, xen_start_info->nr_pages);
+- early_res_to_bootmem(0, xen_start_info->nr_pages<<PAGE_SHIFT);
+-#else
+- free_bootmem_with_active_regions(0, end_pfn);
+- early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
+-#endif
+- reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
+-}
+-#endif
+-
+-#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
+-struct edd edd;
+-#ifdef CONFIG_EDD_MODULE
+-EXPORT_SYMBOL(edd);
+-#endif
+-#ifndef CONFIG_XEN
+-/**
+- * copy_edd() - Copy the BIOS EDD information
+- * from boot_params into a safe place.
+- *
+- */
+-static inline void copy_edd(void)
+-{
+- memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
+- sizeof(edd.mbr_signature));
+- memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
+- edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
+- edd.edd_info_nr = boot_params.eddbuf_entries;
+-}
+-#endif
+-#else
+-static inline void copy_edd(void)
+-{
+-}
+-#endif
+-
+-#ifdef CONFIG_KEXEC
+-#ifndef CONFIG_XEN
+-static void __init reserve_crashkernel(void)
+-{
+- unsigned long long total_mem;
+- unsigned long long crash_size, crash_base;
+- int ret;
+-
+- total_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
+-
+- ret = parse_crashkernel(boot_command_line, total_mem,
+- &crash_size, &crash_base);
+- if (ret == 0 && crash_size) {
+- if (crash_base <= 0) {
+- printk(KERN_INFO "crashkernel reservation failed - "
+- "you have to specify a base address\n");
+- return;
+- }
+-
+- if (reserve_bootmem(crash_base, crash_size,
+- BOOTMEM_EXCLUSIVE) < 0) {
+- printk(KERN_INFO "crashkernel reservation failed - "
+- "memory is in use\n");
+- return;
+- }
+-
+- printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
+- "for crashkernel (System RAM: %ldMB)\n",
+- (unsigned long)(crash_size >> 20),
+- (unsigned long)(crash_base >> 20),
+- (unsigned long)(total_mem >> 20));
+- crashk_res.start = crash_base;
+- crashk_res.end = crash_base + crash_size - 1;
+- insert_resource(&iomem_resource, &crashk_res);
+- }
+-}
+-#else
+-#define reserve_crashkernel xen_machine_kexec_setup_resources
+-#endif
+-#else
+-static inline void __init reserve_crashkernel(void)
+-{}
+-#endif
+-
+-/* Overridden in paravirt.c if CONFIG_PARAVIRT */
+-void __attribute__((weak)) __init memory_setup(void)
+-{
+- machine_specific_memory_setup();
+-}
+-
+-static void __init parse_setup_data(void)
+-{
+- struct setup_data *data;
+- unsigned long pa_data;
+-
+- if (boot_params.hdr.version < 0x0209)
+- return;
+- pa_data = boot_params.hdr.setup_data;
+- while (pa_data) {
+- data = early_ioremap(pa_data, PAGE_SIZE);
+- switch (data->type) {
+- default:
+- break;
+- }
+-#ifndef CONFIG_DEBUG_BOOT_PARAMS
+- free_early(pa_data, pa_data+sizeof(*data)+data->len);
+-#endif
+- pa_data = data->next;
+- early_iounmap(data, PAGE_SIZE);
+- }
+-}
+-
+-#ifdef CONFIG_PCI_MMCONFIG
+-extern void __cpuinit fam10h_check_enable_mmcfg(void);
+-extern void __init check_enable_amd_mmconf_dmi(void);
+-#else
+-void __cpuinit fam10h_check_enable_mmcfg(void)
+-{
+-}
+-void __init check_enable_amd_mmconf_dmi(void)
+-{
+-}
+-#endif
+-
+-/*
+- * setup_arch - architecture-specific boot-time initializations
+- *
+- * Note: On x86_64, fixmaps are ready for use even before this is called.
+- */
+-void __init setup_arch(char **cmdline_p)
+-{
+- unsigned i;
+-
+-#ifdef CONFIG_XEN
+- extern struct e820map machine_e820;
+-
+- printk(KERN_INFO "Command line: %s\n", boot_command_line);
+-
+- /* Register a call for panic conditions. */
+- atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+-
+- WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
+- VMASST_TYPE_writable_pagetables));
+-
+- early_ioremap_init();
+-
+- ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
+- screen_info = boot_params.screen_info;
+-
+- if (is_initial_xendomain()) {
+- const struct dom0_vga_console_info *info =
+- (void *)((char *)xen_start_info +
+- xen_start_info->console.dom0.info_off);
+-
+- dom0_init_screen_info(info,
+- xen_start_info->console.dom0.info_size);
+- xen_start_info->console.domU.mfn = 0;
+- xen_start_info->console.domU.evtchn = 0;
+- } else
+- screen_info.orig_video_isVGA = 0;
+-
+- copy_edid();
+-#else
+- printk(KERN_INFO "Command line: %s\n", boot_command_line);
+-
+- ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
+- screen_info = boot_params.screen_info;
+- edid_info = boot_params.edid_info;
+-#endif /* !CONFIG_XEN */
+- saved_video_mode = boot_params.hdr.vid_mode;
+- bootloader_type = boot_params.hdr.type_of_loader;
+-
+-#ifdef CONFIG_BLK_DEV_RAM
+- rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
+- rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
+- rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
+-#endif
+-#ifdef CONFIG_EFI
+- if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
+- "EL64", 4))
+- efi_enabled = 1;
+-#endif
+-
+- ARCH_SETUP
+-
+- memory_setup();
+- copy_edd();
+-
+- if (!boot_params.hdr.root_flags)
+- root_mountflags &= ~MS_RDONLY;
+- init_mm.start_code = (unsigned long) &_text;
+- init_mm.end_code = (unsigned long) &_etext;
+- init_mm.end_data = (unsigned long) &_edata;
+- init_mm.brk = (unsigned long) &_end;
+-
+- code_resource.start = virt_to_phys(&_text);
+- code_resource.end = virt_to_phys(&_etext)-1;
+- data_resource.start = virt_to_phys(&_etext);
+- data_resource.end = virt_to_phys(&_edata)-1;
+- bss_resource.start = virt_to_phys(&__bss_start);
+- bss_resource.end = virt_to_phys(&__bss_stop)-1;
+-
+- early_identify_cpu(&boot_cpu_data);
+-
+- strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+- *cmdline_p = command_line;
+-
+- parse_setup_data();
+-
+- parse_early_param();
+-
+-#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
+- if (init_ohci1394_dma_early)
+- init_ohci1394_dma_on_all_controllers();
+-#endif
+-
+- finish_e820_parsing();
+-
+-#ifndef CONFIG_XEN
+- /* after parse_early_param, so could debug it */
+- insert_resource(&iomem_resource, &code_resource);
+- insert_resource(&iomem_resource, &data_resource);
+- insert_resource(&iomem_resource, &bss_resource);
+-#endif
+-
+- early_gart_iommu_check();
+-
+- e820_register_active_regions(0, 0, -1UL);
+- /*
+- * partially used pages are not usable - thus
+- * we are rounding upwards:
+- */
+- end_pfn = e820_end_of_ram();
+- /* update e820 for memory not covered by WB MTRRs */
+- mtrr_bp_init();
+-#ifndef CONFIG_XEN
+- if (mtrr_trim_uncached_memory(end_pfn)) {
+- e820_register_active_regions(0, 0, -1UL);
+- end_pfn = e820_end_of_ram();
+- }
+-#endif
+-
+- num_physpages = end_pfn;
+- max_mapnr = end_pfn;
+-
+- check_efer();
+-
+- max_pfn_mapped = init_memory_mapping(0, (max_pfn_mapped << PAGE_SHIFT));
+- if (efi_enabled)
+- efi_init();
+-
+-#ifndef CONFIG_XEN
+- vsmp_init();
+-#endif
+-
+- if (is_initial_xendomain())
+- dmi_scan_machine();
+-
+- io_delay_init();
+-
+-#ifdef CONFIG_KVM_CLOCK
+- kvmclock_init();
+-#endif
+-
+-#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
+- /* setup to use the early static init tables during kernel startup */
+- x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
+- x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init;
+-#ifdef CONFIG_NUMA
+- x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init;
+-#endif
+-#endif
+-
+- /* How many end-of-memory variables you have, grandma! */
+- max_low_pfn = end_pfn;
+- max_pfn = end_pfn;
+- high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
+-
+- /* Remove active ranges so rediscovery with NUMA-awareness happens */
+- remove_all_active_ranges();
+-
+-#ifdef CONFIG_ACPI_NUMA
+- /*
+- * Parse SRAT to discover nodes.
+- */
+- acpi_numa_init();
+-#endif
+-
+-#ifdef CONFIG_NUMA
+- numa_initmem_init(0, end_pfn);
+-#else
+- contig_initmem_init(0, end_pfn);
+-#endif
+-
+-#ifndef CONFIG_XEN
+- dma32_reserve_bootmem();
+-
+-#ifdef CONFIG_ACPI_SLEEP
+- /*
+- * Reserve low memory region for sleep support.
+- */
+- acpi_reserve_bootmem();
+-#endif
+-
+- if (efi_enabled)
+- efi_reserve_bootmem();
+-#endif
+-
+-#ifdef CONFIG_BLK_DEV_INITRD
+-#ifdef CONFIG_XEN
+- if (xen_start_info->mod_start) {
+- unsigned long ramdisk_image = __pa(xen_start_info->mod_start);
+- unsigned long ramdisk_size = xen_start_info->mod_len;
+-#else
+- if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
+- unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
+- unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
+-#endif
+- unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
+- unsigned long end_of_mem = end_pfn << PAGE_SHIFT;
+-
+- if (ramdisk_end <= end_of_mem) {
+- /*
+- * don't need to reserve again, already reserved early
+- * in x86_64_start_kernel, and early_res_to_bootmem
+- * convert that to reserved in bootmem
+- */
+- initrd_start = ramdisk_image + PAGE_OFFSET;
+- initrd_end = initrd_start+ramdisk_size;
+-#ifdef CONFIG_XEN
+- initrd_below_start_ok = 1;
+-#endif
+- } else {
+- free_bootmem(ramdisk_image, ramdisk_size);
+- printk(KERN_ERR "initrd extends beyond end of memory "
+- "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+- ramdisk_end, end_of_mem);
+- initrd_start = 0;
+- }
+- }
+-#endif
+- reserve_crashkernel();
+-
+- reserve_ibft_region();
+-
+- paging_init();
+- map_vsyscall();
+-#ifdef CONFIG_X86_LOCAL_APIC
+- /*
+- * Find and reserve possible boot-time SMP configuration:
+- */
+- find_smp_config();
+-#endif
+-#ifdef CONFIG_XEN
+- {
+- int i, j, k, fpp;
+- unsigned long p2m_pages;
+-
+- p2m_pages = end_pfn;
+- if (xen_start_info->nr_pages > end_pfn) {
+- /*
+- * the end_pfn was shrunk (probably by mem= or highmem=
+- * kernel parameter); shrink reservation with the HV
+- */
+- struct xen_memory_reservation reservation = {
+- .address_bits = 0,
+- .extent_order = 0,
+- .domid = DOMID_SELF
+- };
+- unsigned int difference;
+- int ret;
+-
+- difference = xen_start_info->nr_pages - end_pfn;
+-
+- set_xen_guest_handle(reservation.extent_start,
+- ((unsigned long *)xen_start_info->mfn_list) + end_pfn);
+- reservation.nr_extents = difference;
+- ret = HYPERVISOR_memory_op(XENMEM_decrease_reservation,
+- &reservation);
+- BUG_ON (ret != difference);
+- }
+- else if (end_pfn > xen_start_info->nr_pages)
+- p2m_pages = xen_start_info->nr_pages;
+-
+- if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+- /* Make sure we have a large enough P->M table. */
+- phys_to_machine_mapping = alloc_bootmem_pages(
+- end_pfn * sizeof(unsigned long));
+- memset(phys_to_machine_mapping, ~0,
+- end_pfn * sizeof(unsigned long));
+- memcpy(phys_to_machine_mapping,
+- (unsigned long *)xen_start_info->mfn_list,
+- p2m_pages * sizeof(unsigned long));
+- free_bootmem(
+- __pa(xen_start_info->mfn_list),
+- PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
+- sizeof(unsigned long))));
+-
+- /*
+- * Initialise the list of the frames that specify the
+- * list of frames that make up the p2m table. Used by
+- * save/restore.
+- */
+- pfn_to_mfn_frame_list_list = alloc_bootmem_pages(PAGE_SIZE);
+-
+- fpp = PAGE_SIZE/sizeof(unsigned long);
+- for (i=0, j=0, k=-1; i< end_pfn; i+=fpp, j++) {
+- if ((j % fpp) == 0) {
+- k++;
+- BUG_ON(k>=fpp);
+- pfn_to_mfn_frame_list[k] =
+- alloc_bootmem_pages(PAGE_SIZE);
+- pfn_to_mfn_frame_list_list[k] =
+- virt_to_mfn(pfn_to_mfn_frame_list[k]);
+- j=0;
+- }
+- pfn_to_mfn_frame_list[k][j] =
+- virt_to_mfn(&phys_to_machine_mapping[i]);
+- }
+- HYPERVISOR_shared_info->arch.max_pfn = end_pfn;
+- HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
+- virt_to_mfn(pfn_to_mfn_frame_list_list);
+- }
+-
+- /* Mark all ISA DMA channels in-use - using them wouldn't work. */
+- for (i = 0; i < MAX_DMA_CHANNELS; ++i)
+- if (i != 4 && request_dma(i, "xen") != 0)
+- BUG();
+- }
+-
+-#ifdef CONFIG_ACPI
+- if (!is_initial_xendomain()) {
+- acpi_disabled = 1;
+- acpi_ht = 0;
+- }
+-#endif
+-#endif
+-
+-#ifndef CONFIG_XEN
+- early_quirks();
+-#endif
+-
+-#ifdef CONFIG_ACPI
+- /*
+- * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
+- * Call this early for SRAT node setup.
+- */
+- acpi_boot_table_init();
+-
+- /*
+- * Read APIC and some other early information from ACPI tables.
+- */
+- acpi_boot_init();
+-#endif
+-
+- init_cpu_to_node();
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+- /*
+- * get boot-time SMP configuration:
+- */
+- if (smp_found_config)
+- get_smp_config();
+-#ifndef CONFIG_XEN
+- init_apic_mappings();
+- ioapic_init_mappings();
+-#endif
+-#endif
+-#if defined(CONFIG_XEN) && defined(CONFIG_SMP) && !defined(CONFIG_HOTPLUG_CPU)
+- prefill_possible_map();
+-#endif
+-
+- kvm_guest_init();
+-
+- /*
+- * We trust e820 completely. No explicit ROM probing in memory.
+- */
+-#ifdef CONFIG_XEN
+- if (is_initial_xendomain())
+- e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
+-#else
+- e820_reserve_resources(e820.map, e820.nr_map);
+- e820_mark_nosave_regions();
+-#endif
+-
+- /* request I/O space for devices used on all i[345]86 PCs */
+- for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+- request_resource(&ioport_resource, &standard_io_resources[i]);
+-
+-#ifdef CONFIG_XEN
+- if (is_initial_xendomain())
+- e820_setup_gap(machine_e820.map, machine_e820.nr_map);
+-#else
+- e820_setup_gap(e820.map, e820.nr_map);
+-#endif
+-
+-#ifdef CONFIG_XEN
+- {
+- struct physdev_set_iopl set_iopl;
+-
+- set_iopl.iopl = 1;
+- WARN_ON(HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl));
+-
+- if (is_initial_xendomain()) {
+-#ifdef CONFIG_VT
+-#if defined(CONFIG_VGA_CONSOLE)
+- conswitchp = &vga_con;
+-#elif defined(CONFIG_DUMMY_CONSOLE)
+- conswitchp = &dummy_con;
+-#endif
+-#endif
+- } else {
+-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
+- conswitchp = &dummy_con;
+-#endif
+- }
+- }
+-#else /* CONFIG_XEN */
+-
+-#ifdef CONFIG_VT
+-#if defined(CONFIG_VGA_CONSOLE)
+- if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
+- conswitchp = &vga_con;
+-#elif defined(CONFIG_DUMMY_CONSOLE)
+- conswitchp = &dummy_con;
+-#endif
+-#endif
+-
+-#endif /* !CONFIG_XEN */
+-
+- /* do this before identify_cpu for boot cpu */
+- check_enable_amd_mmconf_dmi();
+-}
+-
+-#ifdef CONFIG_XEN
+-static int
+-xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
+-{
+- HYPERVISOR_shutdown(SHUTDOWN_crash);
+- /* we're never actually going to get here... */
+- return NOTIFY_DONE;
+-}
+-#endif /* !CONFIG_XEN */
+-
+-
+-static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
+-{
+- unsigned int *v;
+-
+- if (c->extended_cpuid_level < 0x80000004)
+- return 0;
+-
+- v = (unsigned int *) c->x86_model_id;
+- cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
+- cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
+- cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
+- c->x86_model_id[48] = 0;
+- return 1;
+-}
+-
+-
+-static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
+-{
+- unsigned int n, dummy, eax, ebx, ecx, edx;
+-
+- n = c->extended_cpuid_level;
+-
+- if (n >= 0x80000005) {
+- cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
+- printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), "
+- "D cache %dK (%d bytes/line)\n",
+- edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
+- c->x86_cache_size = (ecx>>24) + (edx>>24);
+- /* On K8 L1 TLB is inclusive, so don't count it */
+- c->x86_tlbsize = 0;
+- }
+-
+- if (n >= 0x80000006) {
+- cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
+- ecx = cpuid_ecx(0x80000006);
+- c->x86_cache_size = ecx >> 16;
+- c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
+-
+- printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
+- c->x86_cache_size, ecx & 0xFF);
+- }
+- if (n >= 0x80000008) {
+- cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
+- c->x86_virt_bits = (eax >> 8) & 0xff;
+- c->x86_phys_bits = eax & 0xff;
+- }
+-}
+-
+-#ifdef CONFIG_NUMA
+-static int __cpuinit nearby_node(int apicid)
+-{
+- int i, node;
+-
+- for (i = apicid - 1; i >= 0; i--) {
+- node = apicid_to_node[i];
+- if (node != NUMA_NO_NODE && node_online(node))
+- return node;
+- }
+- for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
+- node = apicid_to_node[i];
+- if (node != NUMA_NO_NODE && node_online(node))
+- return node;
+- }
+- return first_node(node_online_map); /* Shouldn't happen */
+-}
+-#endif
+-
+-/*
+- * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
+- * Assumes number of cores is a power of two.
+- */
+-static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c)
+-{
+-#ifdef CONFIG_SMP
+- unsigned bits;
+-#ifdef CONFIG_NUMA
+- int cpu = smp_processor_id();
+- int node = 0;
+- unsigned apicid = hard_smp_processor_id();
+-#endif
+- bits = c->x86_coreid_bits;
+-
+- /* Low order bits define the core id (index of core in socket) */
+- c->cpu_core_id = c->initial_apicid & ((1 << bits)-1);
+- /* Convert the initial APIC ID into the socket ID */
+- c->phys_proc_id = c->initial_apicid >> bits;
+-
+-#ifdef CONFIG_NUMA
+- node = c->phys_proc_id;
+- if (apicid_to_node[apicid] != NUMA_NO_NODE)
+- node = apicid_to_node[apicid];
+- if (!node_online(node)) {
+- /* Two possibilities here:
+- - The CPU is missing memory and no node was created.
+- In that case try picking one from a nearby CPU
+- - The APIC IDs differ from the HyperTransport node IDs
+- which the K8 northbridge parsing fills in.
+- Assume they are all increased by a constant offset,
+- but in the same order as the HT nodeids.
+- If that doesn't result in a usable node fall back to the
+- path for the previous case. */
+-
+- int ht_nodeid = c->initial_apicid;
+-
+- if (ht_nodeid >= 0 &&
+- apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
+- node = apicid_to_node[ht_nodeid];
+- /* Pick a nearby node */
+- if (!node_online(node))
+- node = nearby_node(apicid);
+- }
+- numa_set_node(cpu, node);
+-
+- printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
+-#endif
+-#endif
+-}
+-
+-static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c)
+-{
+-#ifdef CONFIG_SMP
+- unsigned bits, ecx;
+-
+- /* Multi core CPU? */
+- if (c->extended_cpuid_level < 0x80000008)
+- return;
+-
+- ecx = cpuid_ecx(0x80000008);
+-
+- c->x86_max_cores = (ecx & 0xff) + 1;
+-
+- /* CPU telling us the core id bits shift? */
+- bits = (ecx >> 12) & 0xF;
+-
+- /* Otherwise recompute */
+- if (bits == 0) {
+- while ((1 << bits) < c->x86_max_cores)
+- bits++;
+- }
+-
+- c->x86_coreid_bits = bits;
+-
+-#endif
+-}
+-
+-#define ENABLE_C1E_MASK 0x18000000
+-#define CPUID_PROCESSOR_SIGNATURE 1
+-#define CPUID_XFAM 0x0ff00000
+-#define CPUID_XFAM_K8 0x00000000
+-#define CPUID_XFAM_10H 0x00100000
+-#define CPUID_XFAM_11H 0x00200000
+-#define CPUID_XMOD 0x000f0000
+-#define CPUID_XMOD_REV_F 0x00040000
+-
+-#ifndef CONFIG_XEN
+-/* AMD systems with C1E don't have a working lAPIC timer. Check for that. */
+-static __cpuinit int amd_apic_timer_broken(void)
+-{
+- u32 lo, hi, eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
+-
+- switch (eax & CPUID_XFAM) {
+- case CPUID_XFAM_K8:
+- if ((eax & CPUID_XMOD) < CPUID_XMOD_REV_F)
+- break;
+- case CPUID_XFAM_10H:
+- case CPUID_XFAM_11H:
+- rdmsr(MSR_K8_ENABLE_C1E, lo, hi);
+- if (lo & ENABLE_C1E_MASK)
+- return 1;
+- break;
+- default:
+- /* err on the side of caution */
+- return 1;
+- }
+- return 0;
+-}
+-#endif
+-
+-static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
+-{
+- early_init_amd_mc(c);
+-
+- /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
+- if (c->x86_power & (1<<8))
+- set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+-}
+-
+-static void __cpuinit init_amd(struct cpuinfo_x86 *c)
+-{
+- unsigned level;
+-
+-#ifdef CONFIG_SMP
+- unsigned long value;
+-
+- /*
+- * Disable TLB flush filter by setting HWCR.FFDIS on K8
+- * bit 6 of msr C001_0015
+- *
+- * Errata 63 for SH-B3 steppings
+- * Errata 122 for all steppings (F+ have it disabled by default)
+- */
+- if (c->x86 == 15) {
+- rdmsrl(MSR_K8_HWCR, value);
+- value |= 1 << 6;
+- wrmsrl(MSR_K8_HWCR, value);
+- }
+-#endif
+-
+- /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
+- 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
+- clear_cpu_cap(c, 0*32+31);
+-
+- /* On C+ stepping K8 rep microcode works well for copy/memset */
+- level = cpuid_eax(1);
+- if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) ||
+- level >= 0x0f58))
+- set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+- if (c->x86 == 0x10 || c->x86 == 0x11)
+- set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+-
+- /* Enable workaround for FXSAVE leak */
+- if (c->x86 >= 6)
+- set_cpu_cap(c, X86_FEATURE_FXSAVE_LEAK);
+-
+- level = get_model_name(c);
+- if (!level) {
+- switch (c->x86) {
+- case 15:
+- /* Should distinguish Models here, but this is only
+- a fallback anyways. */
+- strcpy(c->x86_model_id, "Hammer");
+- break;
+- }
+- }
+- display_cacheinfo(c);
+-
+- /* Multi core CPU? */
+- if (c->extended_cpuid_level >= 0x80000008)
+- amd_detect_cmp(c);
+-
+- if (c->extended_cpuid_level >= 0x80000006 &&
+- (cpuid_edx(0x80000006) & 0xf000))
+- num_cache_leaves = 4;
+- else
+- num_cache_leaves = 3;
+-
+- if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11)
+- set_cpu_cap(c, X86_FEATURE_K8);
+-
+- /* MFENCE stops RDTSC speculation */
+- set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC);
+-
+- if (c->x86 == 0x10)
+- fam10h_check_enable_mmcfg();
+-
+-#ifndef CONFIG_XEN
+- if (amd_apic_timer_broken())
+- disable_apic_timer = 1;
+-
+- if (c == &boot_cpu_data && c->x86 >= 0xf && c->x86 <= 0x11) {
+- unsigned long long tseg;
+-
+- /*
+- * Split up direct mapping around the TSEG SMM area.
+- * Don't do it for gbpages because there seems very little
+- * benefit in doing so.
+- */
+- if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg) &&
+- (tseg >> PMD_SHIFT) < (max_pfn_mapped >> (PMD_SHIFT-PAGE_SHIFT)))
+- set_memory_4k((unsigned long)__va(tseg), 1);
+- }
+-#endif
+-}
+-
+-void __cpuinit detect_ht(struct cpuinfo_x86 *c)
+-{
+-#ifdef CONFIG_SMP
+- u32 eax, ebx, ecx, edx;
+- int index_msb, core_bits;
+-
+- cpuid(1, &eax, &ebx, &ecx, &edx);
+-
+-
+- if (!cpu_has(c, X86_FEATURE_HT))
+- return;
+- if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
+- goto out;
+-
+- smp_num_siblings = (ebx & 0xff0000) >> 16;
+-
+- if (smp_num_siblings == 1) {
+- printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
+- } else if (smp_num_siblings > 1) {
+-
+- if (smp_num_siblings > NR_CPUS) {
+- printk(KERN_WARNING "CPU: Unsupported number of "
+- "siblings %d", smp_num_siblings);
+- smp_num_siblings = 1;
+- return;
+- }
+-
+- index_msb = get_count_order(smp_num_siblings);
+- c->phys_proc_id = phys_pkg_id(index_msb);
+-
+- smp_num_siblings = smp_num_siblings / c->x86_max_cores;
+-
+- index_msb = get_count_order(smp_num_siblings);
+-
+- core_bits = get_count_order(c->x86_max_cores);
+-
+- c->cpu_core_id = phys_pkg_id(index_msb) &
+- ((1 << core_bits) - 1);
+- }
+-out:
+- if ((c->x86_max_cores * smp_num_siblings) > 1) {
+- printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
+- c->phys_proc_id);
+- printk(KERN_INFO "CPU: Processor Core ID: %d\n",
+- c->cpu_core_id);
+- }
+-
+-#endif
+-}
+-
+-/*
+- * find out the number of processor cores on the die
+- */
+-static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
+-{
+- unsigned int eax, t;
+-
+- if (c->cpuid_level < 4)
+- return 1;
+-
+- cpuid_count(4, 0, &eax, &t, &t, &t);
+-
+- if (eax & 0x1f)
+- return ((eax >> 26) + 1);
+- else
+- return 1;
+-}
+-
+-static void __cpuinit srat_detect_node(void)
+-{
+-#ifdef CONFIG_NUMA
+- unsigned node;
+- int cpu = smp_processor_id();
+- int apicid = hard_smp_processor_id();
+-
+- /* Don't do the funky fallback heuristics the AMD version employs
+- for now. */
+- node = apicid_to_node[apicid];
+- if (node == NUMA_NO_NODE || !node_online(node))
+- node = first_node(node_online_map);
+- numa_set_node(cpu, node);
+-
+- printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
+-#endif
+-}
+-
+-static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
+-{
+- if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
+- (c->x86 == 0x6 && c->x86_model >= 0x0e))
+- set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+-}
+-
+-static void __cpuinit init_intel(struct cpuinfo_x86 *c)
+-{
+- /* Cache sizes */
+- unsigned n;
+-
+- init_intel_cacheinfo(c);
+- if (c->cpuid_level > 9) {
+- unsigned eax = cpuid_eax(10);
+- /* Check for version and the number of counters */
+- if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
+- set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
+- }
+-
+- if (cpu_has_ds) {
+- unsigned int l1, l2;
+- rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
+- if (!(l1 & (1<<11)))
+- set_cpu_cap(c, X86_FEATURE_BTS);
+- if (!(l1 & (1<<12)))
+- set_cpu_cap(c, X86_FEATURE_PEBS);
+- }
+-
+-
+- if (cpu_has_bts)
+- ds_init_intel(c);
+-
+- n = c->extended_cpuid_level;
+- if (n >= 0x80000008) {
+- unsigned eax = cpuid_eax(0x80000008);
+- c->x86_virt_bits = (eax >> 8) & 0xff;
+- c->x86_phys_bits = eax & 0xff;
+- /* CPUID workaround for Intel 0F34 CPU */
+- if (c->x86_vendor == X86_VENDOR_INTEL &&
+- c->x86 == 0xF && c->x86_model == 0x3 &&
+- c->x86_mask == 0x4)
+- c->x86_phys_bits = 36;
+- }
+-
+- if (c->x86 == 15)
+- c->x86_cache_alignment = c->x86_clflush_size * 2;
+- if (c->x86 == 6)
+- set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+- set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
+- c->x86_max_cores = intel_num_cpu_cores(c);
+-
+- srat_detect_node();
+-}
+-
+-static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
+-{
+- if (c->x86 == 0x6 && c->x86_model >= 0xf)
+- set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+-}
+-
+-static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
+-{
+- /* Cache sizes */
+- unsigned n;
+-
+- n = c->extended_cpuid_level;
+- if (n >= 0x80000008) {
+- unsigned eax = cpuid_eax(0x80000008);
+- c->x86_virt_bits = (eax >> 8) & 0xff;
+- c->x86_phys_bits = eax & 0xff;
+- }
+-
+- if (c->x86 == 0x6 && c->x86_model >= 0xf) {
+- c->x86_cache_alignment = c->x86_clflush_size * 2;
+- set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+- set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+- }
+- set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
+-}
+-
+-static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
+-{
+- char *v = c->x86_vendor_id;
+-
+- if (!strcmp(v, "AuthenticAMD"))
+- c->x86_vendor = X86_VENDOR_AMD;
+- else if (!strcmp(v, "GenuineIntel"))
+- c->x86_vendor = X86_VENDOR_INTEL;
+- else if (!strcmp(v, "CentaurHauls"))
+- c->x86_vendor = X86_VENDOR_CENTAUR;
+- else
+- c->x86_vendor = X86_VENDOR_UNKNOWN;
+-}
+-
+-/* Do some early cpuid on the boot CPU to get some parameter that are
+- needed before check_bugs. Everything advanced is in identify_cpu
+- below. */
+-static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
+-{
+- u32 tfms, xlvl;
+-
+- c->loops_per_jiffy = loops_per_jiffy;
+- c->x86_cache_size = -1;
+- c->x86_vendor = X86_VENDOR_UNKNOWN;
+- c->x86_model = c->x86_mask = 0; /* So far unknown... */
+- c->x86_vendor_id[0] = '\0'; /* Unset */
+- c->x86_model_id[0] = '\0'; /* Unset */
+- c->x86_clflush_size = 64;
+- c->x86_cache_alignment = c->x86_clflush_size;
+- c->x86_max_cores = 1;
+- c->x86_coreid_bits = 0;
+- c->extended_cpuid_level = 0;
+- memset(&c->x86_capability, 0, sizeof c->x86_capability);
+-
+- /* Get vendor name */
+- cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
+- (unsigned int *)&c->x86_vendor_id[0],
+- (unsigned int *)&c->x86_vendor_id[8],
+- (unsigned int *)&c->x86_vendor_id[4]);
+-
+- get_cpu_vendor(c);
+-
+- /* Initialize the standard set of capabilities */
+- /* Note that the vendor-specific code below might override */
+-
+- /* Intel-defined flags: level 0x00000001 */
+- if (c->cpuid_level >= 0x00000001) {
+- __u32 misc;
+- cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
+- &c->x86_capability[0]);
+- c->x86 = (tfms >> 8) & 0xf;
+- c->x86_model = (tfms >> 4) & 0xf;
+- c->x86_mask = tfms & 0xf;
+- if (c->x86 == 0xf)
+- c->x86 += (tfms >> 20) & 0xff;
+- if (c->x86 >= 0x6)
+- c->x86_model += ((tfms >> 16) & 0xF) << 4;
+- if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
+- c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
+- } else {
+- /* Have CPUID level 0 only - unheard of */
+- c->x86 = 4;
+- }
+-
+- c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;
+-#ifdef CONFIG_SMP
+- c->phys_proc_id = c->initial_apicid;
+-#endif
+- /* AMD-defined flags: level 0x80000001 */
+- xlvl = cpuid_eax(0x80000000);
+- c->extended_cpuid_level = xlvl;
+- if ((xlvl & 0xffff0000) == 0x80000000) {
+- if (xlvl >= 0x80000001) {
+- c->x86_capability[1] = cpuid_edx(0x80000001);
+- c->x86_capability[6] = cpuid_ecx(0x80000001);
+- }
+- if (xlvl >= 0x80000004)
+- get_model_name(c); /* Default name */
+- }
+-
+- /* Transmeta-defined flags: level 0x80860001 */
+- xlvl = cpuid_eax(0x80860000);
+- if ((xlvl & 0xffff0000) == 0x80860000) {
+- /* Don't set x86_cpuid_level here for now to not confuse. */
+- if (xlvl >= 0x80860001)
+- c->x86_capability[2] = cpuid_edx(0x80860001);
+- }
+-
+- c->extended_cpuid_level = cpuid_eax(0x80000000);
+- if (c->extended_cpuid_level >= 0x80000007)
+- c->x86_power = cpuid_edx(0x80000007);
+-
+- switch (c->x86_vendor) {
+- case X86_VENDOR_AMD:
+- early_init_amd(c);
+- break;
+- case X86_VENDOR_INTEL:
+- early_init_intel(c);
+- break;
+- case X86_VENDOR_CENTAUR:
+- early_init_centaur(c);
+- break;
+- }
+-
+- validate_pat_support(c);
+-}
+-
+-/*
+- * This does the hard work of actually picking apart the CPU stuff...
+- */
+-void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
+-{
+- int i;
+-
+- early_identify_cpu(c);
+-
+- init_scattered_cpuid_features(c);
+-
+- c->apicid = phys_pkg_id(0);
+-
+- /*
+- * Vendor-specific initialization. In this section we
+- * canonicalize the feature flags, meaning if there are
+- * features a certain CPU supports which CPUID doesn't
+- * tell us, CPUID claiming incorrect flags, or other bugs,
+- * we handle them here.
+- *
+- * At the end of this section, c->x86_capability better
+- * indicate the features this CPU genuinely supports!
+- */
+- switch (c->x86_vendor) {
+- case X86_VENDOR_AMD:
+- init_amd(c);
+- break;
+-
+- case X86_VENDOR_INTEL:
+- init_intel(c);
+- break;
+-
+- case X86_VENDOR_CENTAUR:
+- init_centaur(c);
+- break;
+-
+- case X86_VENDOR_UNKNOWN:
+- default:
+- display_cacheinfo(c);
+- break;
+- }
+-
+- detect_ht(c);
+-
+- /*
+- * On SMP, boot_cpu_data holds the common feature set between
+- * all CPUs; so make sure that we indicate which features are
+- * common between the CPUs. The first time this routine gets
+- * executed, c == &boot_cpu_data.
+- */
+- if (c != &boot_cpu_data) {
+- /* AND the already accumulated flags with these */
+- for (i = 0; i < NCAPINTS; i++)
+- boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
+- }
+-
+- /* Clear all flags overriden by options */
+- for (i = 0; i < NCAPINTS; i++)
+- c->x86_capability[i] &= ~cleared_cpu_caps[i];
+-
+-#ifdef CONFIG_X86_MCE
+- mcheck_init(c);
+-#endif
+- select_idle_routine(c);
+-
+-#ifdef CONFIG_NUMA
+- numa_add_cpu(smp_processor_id());
+-#endif
+-
+-}
+-
+-void __cpuinit identify_boot_cpu(void)
+-{
+- identify_cpu(&boot_cpu_data);
+-}
+-
+-void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
+-{
+- BUG_ON(c == &boot_cpu_data);
+- identify_cpu(c);
+- mtrr_ap_init();
+-}
+-
+-static __init int setup_noclflush(char *arg)
+-{
+- setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
+- return 1;
+-}
+-__setup("noclflush", setup_noclflush);
+-
+-void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
+-{
+- if (c->x86_model_id[0])
+- printk(KERN_CONT "%s", c->x86_model_id);
+-
+- if (c->x86_mask || c->cpuid_level >= 0)
+- printk(KERN_CONT " stepping %02x\n", c->x86_mask);
+- else
+- printk(KERN_CONT "\n");
+-}
+-
+-static __init int setup_disablecpuid(char *arg)
+-{
+- int bit;
+- if (get_option(&arg, &bit) && bit < NCAPINTS*32)
+- setup_clear_cpu_cap(bit);
+- else
+- return 0;
+- return 1;
+-}
+-__setup("clearcpuid=", setup_disablecpuid);
+Index: head-2008-12-01/arch/x86/kernel/setup_percpu-xen.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/arch/x86/kernel/setup_percpu-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -0,0 +1,385 @@
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/bootmem.h>
++#include <linux/percpu.h>
++#include <linux/kexec.h>
++#include <linux/crash_dump.h>
++#include <asm/smp.h>
++#include <asm/percpu.h>
++#include <asm/sections.h>
++#include <asm/processor.h>
++#include <asm/setup.h>
++#include <asm/topology.h>
++#include <asm/mpspec.h>
++#include <asm/apicdef.h>
++#include <asm/highmem.h>
++
++#ifdef CONFIG_X86_LOCAL_APIC
++unsigned int num_processors;
++unsigned disabled_cpus __cpuinitdata;
++/* Processor that is doing the boot up */
++unsigned int boot_cpu_physical_apicid = -1U;
++unsigned int max_physical_apicid;
++EXPORT_SYMBOL(boot_cpu_physical_apicid);
++
++/* Bitmask of physically existing CPUs */
++physid_mask_t phys_cpu_present_map;
++#endif
++
++/* map cpu index to physical APIC ID */
++#ifndef CONFIG_XEN
++DEFINE_EARLY_PER_CPU(u16, x86_cpu_to_apicid, BAD_APICID);
++DEFINE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid, BAD_APICID);
++EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
++EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
++#else
++DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID;
++EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid);
++#endif
++
++#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
++#define X86_64_NUMA 1
++
++/* map cpu index to node index */
++DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
++EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);
++
++/* which logical CPUs are on which nodes */
++cpumask_t *node_to_cpumask_map;
++EXPORT_SYMBOL(node_to_cpumask_map);
++
++/* setup node_to_cpumask_map */
++static void __init setup_node_to_cpumask_map(void);
++
++#else
++static inline void setup_node_to_cpumask_map(void) { }
++#endif
++
++#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_X86_SMP)
++/*
++ * Copy data used in early init routines from the initial arrays to the
++ * per cpu data areas. These arrays then become expendable and the
++ * *_early_ptr's are zeroed indicating that the static arrays are gone.
++ */
++static void __init setup_per_cpu_maps(void)
++{
++#ifndef CONFIG_XEN
++ int cpu;
++
++ for_each_possible_cpu(cpu) {
++ per_cpu(x86_cpu_to_apicid, cpu) =
++ early_per_cpu_map(x86_cpu_to_apicid, cpu);
++ per_cpu(x86_bios_cpu_apicid, cpu) =
++ early_per_cpu_map(x86_bios_cpu_apicid, cpu);
++#ifdef X86_64_NUMA
++ per_cpu(x86_cpu_to_node_map, cpu) =
++ early_per_cpu_map(x86_cpu_to_node_map, cpu);
++#endif
++ }
++
++ /* indicate the early static arrays will soon be gone */
++ early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
++ early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
++#ifdef X86_64_NUMA
++ early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
++#endif
++#endif
++}
++
++#ifdef CONFIG_X86_32
++/*
++ * Great future not-so-futuristic plan: make i386 and x86_64 do it
++ * the same way
++ */
++unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
++EXPORT_SYMBOL(__per_cpu_offset);
++static inline void setup_cpu_pda_map(void) { }
++
++#elif !defined(CONFIG_SMP)
++static inline void setup_cpu_pda_map(void) { }
++
++#else /* CONFIG_SMP && CONFIG_X86_64 */
++
++/*
++ * Allocate cpu_pda pointer table and array via alloc_bootmem.
++ */
++static void __init setup_cpu_pda_map(void)
++{
++ char *pda;
++ struct x8664_pda **new_cpu_pda;
++ unsigned long size;
++ int cpu;
++
++ size = roundup(sizeof(struct x8664_pda), cache_line_size());
++
++ /* allocate cpu_pda array and pointer table */
++ {
++ unsigned long tsize = nr_cpu_ids * sizeof(void *);
++ unsigned long asize = size * (nr_cpu_ids - 1);
++
++ tsize = roundup(tsize, cache_line_size());
++ new_cpu_pda = alloc_bootmem(tsize + asize);
++ pda = (char *)new_cpu_pda + tsize;
++ }
++
++ /* initialize pointer table to static pda's */
++ for_each_possible_cpu(cpu) {
++ if (cpu == 0) {
++ /* leave boot cpu pda in place */
++ new_cpu_pda[0] = cpu_pda(0);
++ continue;
++ }
++ new_cpu_pda[cpu] = (struct x8664_pda *)pda;
++ new_cpu_pda[cpu]->in_bootmem = 1;
++ pda += size;
++ }
++
++ /* point to new pointer table */
++ _cpu_pda = new_cpu_pda;
++}
++#endif
++
++/*
++ * Great future plan:
++ * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
++ * Always point %gs to its beginning
++ */
++void __init setup_per_cpu_areas(void)
++{
++ ssize_t size = PERCPU_ENOUGH_ROOM;
++ char *ptr;
++ int cpu;
++
++ /* Setup cpu_pda map */
++ setup_cpu_pda_map();
++
++ /* Copy section for each CPU (we discard the original) */
++ size = PERCPU_ENOUGH_ROOM;
++ printk(KERN_INFO "PERCPU: Allocating %zd bytes of per cpu data\n",
++ size);
++
++ for_each_possible_cpu(cpu) {
++#ifndef CONFIG_NEED_MULTIPLE_NODES
++ ptr = alloc_bootmem_pages(size);
++#else
++ int node = early_cpu_to_node(cpu);
++ if (!node_online(node) || !NODE_DATA(node)) {
++ ptr = alloc_bootmem_pages(size);
++ printk(KERN_INFO
++ "cpu %d has no node %d or node-local memory\n",
++ cpu, node);
++ }
++ else
++ ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
++#endif
++ per_cpu_offset(cpu) = ptr - __per_cpu_start;
++ memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
++
++ }
++
++ printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d, nr_node_ids %d\n",
++ NR_CPUS, nr_cpu_ids, nr_node_ids);
++
++ /* Setup percpu data maps */
++ setup_per_cpu_maps();
++
++ /* Setup node to cpumask map */
++ setup_node_to_cpumask_map();
++}
++
++#endif
++
++#ifdef X86_64_NUMA
++
++/*
++ * Allocate node_to_cpumask_map based on number of available nodes
++ * Requires node_possible_map to be valid.
++ *
++ * Note: node_to_cpumask() is not valid until after this is done.
++ */
++static void __init setup_node_to_cpumask_map(void)
++{
++ unsigned int node, num = 0;
++ cpumask_t *map;
++
++ /* setup nr_node_ids if not done yet */
++ if (nr_node_ids == MAX_NUMNODES) {
++ for_each_node_mask(node, node_possible_map)
++ num = node;
++ nr_node_ids = num + 1;
++ }
++
++ /* allocate the map */
++ map = alloc_bootmem_low(nr_node_ids * sizeof(cpumask_t));
++
++ pr_debug(KERN_DEBUG "Node to cpumask map at %p for %d nodes\n",
++ map, nr_node_ids);
++
++ /* node_to_cpumask() will now work */
++ node_to_cpumask_map = map;
++}
++
++void __cpuinit numa_set_node(int cpu, int node)
++{
++ int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);
++
++ if (cpu_pda(cpu) && node != NUMA_NO_NODE)
++ cpu_pda(cpu)->nodenumber = node;
++
++ if (cpu_to_node_map)
++ cpu_to_node_map[cpu] = node;
++
++ else if (per_cpu_offset(cpu))
++ per_cpu(x86_cpu_to_node_map, cpu) = node;
++
++ else
++ pr_debug("Setting node for non-present cpu %d\n", cpu);
++}
++
++void __cpuinit numa_clear_node(int cpu)
++{
++ numa_set_node(cpu, NUMA_NO_NODE);
++}
++
++#ifndef CONFIG_DEBUG_PER_CPU_MAPS
++
++void __cpuinit numa_add_cpu(int cpu)
++{
++ cpu_set(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
++}
++
++void __cpuinit numa_remove_cpu(int cpu)
++{
++ cpu_clear(cpu, node_to_cpumask_map[cpu_to_node(cpu)]);
++}
++
++#else /* CONFIG_DEBUG_PER_CPU_MAPS */
++
++/*
++ * --------- debug versions of the numa functions ---------
++ */
++static void __cpuinit numa_set_cpumask(int cpu, int enable)
++{
++ int node = cpu_to_node(cpu);
++ cpumask_t *mask;
++ char buf[64];
++
++ if (node_to_cpumask_map == NULL) {
++ printk(KERN_ERR "node_to_cpumask_map NULL\n");
++ dump_stack();
++ return;
++ }
++
++ mask = &node_to_cpumask_map[node];
++ if (enable)
++ cpu_set(cpu, *mask);
++ else
++ cpu_clear(cpu, *mask);
++
++ cpulist_scnprintf(buf, sizeof(buf), *mask);
++ printk(KERN_DEBUG "%s cpu %d node %d: mask now %s\n",
++ enable? "numa_add_cpu":"numa_remove_cpu", cpu, node, buf);
++ }
++
++void __cpuinit numa_add_cpu(int cpu)
++{
++ numa_set_cpumask(cpu, 1);
++}
++
++void __cpuinit numa_remove_cpu(int cpu)
++{
++ numa_set_cpumask(cpu, 0);
++}
++
++int cpu_to_node(int cpu)
++{
++ if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
++ printk(KERN_WARNING
++ "cpu_to_node(%d): usage too early!\n", cpu);
++ dump_stack();
++ return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
++ }
++ return per_cpu(x86_cpu_to_node_map, cpu);
++}
++EXPORT_SYMBOL(cpu_to_node);
++
++/*
++ * Same function as cpu_to_node() but used if called before the
++ * per_cpu areas are setup.
++ */
++int early_cpu_to_node(int cpu)
++{
++ if (early_per_cpu_ptr(x86_cpu_to_node_map))
++ return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
++
++ if (!per_cpu_offset(cpu)) {
++ printk(KERN_WARNING
++ "early_cpu_to_node(%d): no per_cpu area!\n", cpu);
++ dump_stack();
++ return NUMA_NO_NODE;
++ }
++ return per_cpu(x86_cpu_to_node_map, cpu);
++}
++
++
++/* empty cpumask */
++static const cpumask_t cpu_mask_none;
++
++/*
++ * Returns a pointer to the bitmask of CPUs on Node 'node'.
++ */
++const cpumask_t *_node_to_cpumask_ptr(int node)
++{
++ if (node_to_cpumask_map == NULL) {
++ printk(KERN_WARNING
++ "_node_to_cpumask_ptr(%d): no node_to_cpumask_map!\n",
++ node);
++ dump_stack();
++ return (const cpumask_t *)&cpu_online_map;
++ }
++ if (node >= nr_node_ids) {
++ printk(KERN_WARNING
++ "_node_to_cpumask_ptr(%d): node > nr_node_ids(%d)\n",
++ node, nr_node_ids);
++ dump_stack();
++ return &cpu_mask_none;
++ }
++ return &node_to_cpumask_map[node];
++}
++EXPORT_SYMBOL(_node_to_cpumask_ptr);
++
++/*
++ * Returns a bitmask of CPUs on Node 'node'.
++ *
++ * Side note: this function creates the returned cpumask on the stack
++ * so with a high NR_CPUS count, excessive stack space is used. The
++ * node_to_cpumask_ptr function should be used whenever possible.
++ */
++cpumask_t node_to_cpumask(int node)
++{
++ if (node_to_cpumask_map == NULL) {
++ printk(KERN_WARNING
++ "node_to_cpumask(%d): no node_to_cpumask_map!\n", node);
++ dump_stack();
++ return cpu_online_map;
++ }
++ if (node >= nr_node_ids) {
++ printk(KERN_WARNING
++ "node_to_cpumask(%d): node > nr_node_ids(%d)\n",
++ node, nr_node_ids);
++ dump_stack();
++ return cpu_mask_none;
++ }
++ return node_to_cpumask_map[node];
++}
++EXPORT_SYMBOL(node_to_cpumask);
++
++/*
++ * --------- end of debug versions of the numa functions ---------
++ */
++
++#endif /* CONFIG_DEBUG_PER_CPU_MAPS */
++
++#endif /* X86_64_NUMA */
++
+Index: head-2008-12-01/arch/x86/kernel/smp-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/smp-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/smp-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -121,132 +121,14 @@ void xen_smp_send_reschedule(int cpu)
+ send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
+ }
+
+-/*
+- * Structure and data for smp_call_function(). This is designed to minimise
+- * static memory requirements. It also looks cleaner.
+- */
+-static DEFINE_SPINLOCK(call_lock);
+-
+-struct call_data_struct {
+- void (*func) (void *info);
+- void *info;
+- atomic_t started;
+- atomic_t finished;
+- int wait;
+-};
+-
+-void lock_ipi_call_lock(void)
++void xen_send_call_func_single_ipi(int cpu)
+ {
+- spin_lock_irq(&call_lock);
++ send_IPI_mask(cpumask_of_cpu(cpu), CALL_FUNC_SINGLE_VECTOR);
+ }
+
+-void unlock_ipi_call_lock(void)
++void xen_send_call_func_ipi(cpumask_t mask)
+ {
+- spin_unlock_irq(&call_lock);
+-}
+-
+-static struct call_data_struct *call_data;
+-
+-static void __smp_call_function(void (*func) (void *info), void *info,
+- int nonatomic, int wait)
+-{
+- struct call_data_struct data;
+- int cpus = num_online_cpus() - 1;
+-
+- if (!cpus)
+- return;
+-
+- data.func = func;
+- data.info = info;
+- atomic_set(&data.started, 0);
+- data.wait = wait;
+- if (wait)
+- atomic_set(&data.finished, 0);
+-
+- call_data = &data;
+- mb();
+-
+- /* Send a message to all other CPUs and wait for them to respond */
+- send_IPI_allbutself(CALL_FUNCTION_VECTOR);
+-
+- /* Wait for response */
+- while (atomic_read(&data.started) != cpus)
+- cpu_relax();
+-
+- if (wait)
+- while (atomic_read(&data.finished) != cpus)
+- cpu_relax();
+-}
+-
+-
+-/**
+- * smp_call_function_mask(): Run a function on a set of other CPUs.
+- * @mask: The set of cpus to run on. Must not include the current cpu.
+- * @func: The function to run. This must be fast and non-blocking.
+- * @info: An arbitrary pointer to pass to the function.
+- * @wait: If true, wait (atomically) until function has completed on other CPUs.
+- *
+- * Returns 0 on success, else a negative status code.
+- *
+- * If @wait is true, then returns once @func has returned; otherwise
+- * it returns just before the target cpu calls @func.
+- *
+- * You must not call this function with disabled interrupts or from a
+- * hardware interrupt handler or from a bottom half handler.
+- */
+-int
+-xen_smp_call_function_mask(cpumask_t mask,
+- void (*func)(void *), void *info,
+- int wait)
+-{
+- struct call_data_struct data;
+- cpumask_t allbutself;
+- int cpus;
+-
+- /* Can deadlock when called with interrupts disabled */
+- WARN_ON(irqs_disabled());
+-
+- /* Holding any lock stops cpus from going down. */
+- spin_lock(&call_lock);
+-
+- allbutself = cpu_online_map;
+- cpu_clear(smp_processor_id(), allbutself);
+-
+- cpus_and(mask, mask, allbutself);
+- cpus = cpus_weight(mask);
+-
+- if (!cpus) {
+- spin_unlock(&call_lock);
+- return 0;
+- }
+-
+- data.func = func;
+- data.info = info;
+- atomic_set(&data.started, 0);
+- data.wait = wait;
+- if (wait)
+- atomic_set(&data.finished, 0);
+-
+- call_data = &data;
+- wmb();
+-
+- /* Send a message to other CPUs */
+- if (cpus_equal(mask, allbutself) &&
+- cpus_equal(cpu_online_map, cpu_callout_map))
+- send_IPI_allbutself(CALL_FUNCTION_VECTOR);
+- else
+- send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
+-
+- /* Wait for response */
+- while (atomic_read(&data.started) != cpus)
+- cpu_relax();
+-
+- if (wait)
+- while (atomic_read(&data.finished) != cpus)
+- cpu_relax();
+- spin_unlock(&call_lock);
+-
+- return 0;
++ send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
+ }
+
+ static void stop_this_cpu(void *dummy)
+@@ -268,15 +150,10 @@ static void stop_this_cpu(void *dummy)
+
+ void xen_smp_send_stop(void)
+ {
+- int nolock;
+ unsigned long flags;
+
+- /* Don't deadlock on the call lock in panic */
+- nolock = !spin_trylock(&call_lock);
++ smp_call_function(stop_this_cpu, NULL, 0);
+ local_irq_save(flags);
+- __smp_call_function(stop_this_cpu, NULL, 0, 0);
+- if (!nolock)
+- spin_unlock(&call_lock);
+ disable_all_local_evtchn();
+ local_irq_restore(flags);
+ }
+@@ -298,21 +175,8 @@ irqreturn_t smp_reschedule_interrupt(int
+
+ irqreturn_t smp_call_function_interrupt(int irq, void *dev_id)
+ {
+- void (*func) (void *info) = call_data->func;
+- void *info = call_data->info;
+- int wait = call_data->wait;
+-
+- /*
+- * Notify initiating CPU that I've grabbed the data and am
+- * about to execute the function
+- */
+- mb();
+- atomic_inc(&call_data->started);
+- /*
+- * At this point the info structure may be out of scope unless wait==1
+- */
+ irq_enter();
+- (*func)(info);
++ generic_smp_call_function_interrupt();
+ #ifdef CONFIG_X86_32
+ __get_cpu_var(irq_stat).irq_call_count++;
+ #else
+@@ -320,10 +184,19 @@ irqreturn_t smp_call_function_interrupt(
+ #endif
+ irq_exit();
+
+- if (wait) {
+- mb();
+- atomic_inc(&call_data->finished);
+- }
++ return IRQ_HANDLED;
++}
++
++irqreturn_t smp_call_function_single_interrupt(int irq, void *dev_id)
++{
++ irq_enter();
++ generic_smp_call_function_single_interrupt();
++#ifdef CONFIG_X86_32
++ __get_cpu_var(irq_stat).irq_call_count++;
++#else
++ add_pda(irq_call_count, 1);
++#endif
++ irq_exit();
+
+ return IRQ_HANDLED;
+ }
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 11:58:30.000000000 +0100
+@@ -470,7 +470,7 @@ irqreturn_t timer_interrupt(int irq, voi
+
+ /* Keep nmi watchdog up to date */
+ #ifdef __i386__
+- per_cpu(irq_stat, smp_processor_id()).irq0_irqs++;
++ x86_add_percpu(irq_stat.irq0_irqs, 1);
+ #else
+ add_pda(irq0_irqs, 1);
+ #endif
+@@ -748,9 +748,7 @@ void __init time_init(void)
+
+ update_wallclock();
+
+-#ifndef CONFIG_X86_64
+ use_tsc_delay();
+-#endif
+
+ /* Cannot request_irq() until kmem is initialised. */
+ late_time_init = setup_cpu0_timer_irq;
+@@ -807,7 +805,8 @@ static void stop_hz_timer(void)
+
+ /* Leave ourselves in tick mode if rcu or softirq or timer pending. */
+ if (rcu_needs_cpu(cpu) || local_softirq_pending() ||
+- (j = next_timer_interrupt(), time_before_eq(j, jiffies))) {
++ (j = get_next_timer_interrupt(jiffies),
++ time_before_eq(j, jiffies))) {
+ cpu_clear(cpu, nohz_cpu_mask);
+ j = jiffies + 1;
+ }
+Index: head-2008-12-01/arch/x86/kernel/traps_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_32-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -1,5 +1,6 @@
+ /*
+ * Copyright (C) 1991, 1992 Linus Torvalds
++ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ *
+ * Pentium III FXSR, SSE support
+ * Gareth Hughes <gareth@valinux.com>, May 2000
+@@ -57,11 +58,10 @@
+ #include <asm/nmi.h>
+ #include <asm/smp.h>
+ #include <asm/io.h>
++#include <asm/traps.h>
+
+ #include "mach_traps.h"
+
+-int panic_on_unrecovered_nmi;
+-
+ #ifndef CONFIG_XEN
+ DECLARE_BITMAP(used_vectors, NR_VECTORS);
+ EXPORT_SYMBOL_GPL(used_vectors);
+@@ -82,43 +82,22 @@ gate_desc idt_table[256]
+ __attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+ #endif
+
+-asmlinkage void divide_error(void);
+-asmlinkage void debug(void);
+-asmlinkage void nmi(void);
+-asmlinkage void int3(void);
+-asmlinkage void overflow(void);
+-asmlinkage void bounds(void);
+-asmlinkage void invalid_op(void);
+-asmlinkage void device_not_available(void);
+-asmlinkage void coprocessor_segment_overrun(void);
+-asmlinkage void invalid_TSS(void);
+-asmlinkage void segment_not_present(void);
+-asmlinkage void stack_segment(void);
+-asmlinkage void general_protection(void);
+-asmlinkage void page_fault(void);
+-asmlinkage void coprocessor_error(void);
+-asmlinkage void simd_coprocessor_error(void);
+-asmlinkage void alignment_check(void);
+-#ifndef CONFIG_XEN
+-asmlinkage void spurious_interrupt_bug(void);
+-#else
+-asmlinkage void fixup_4gb_segment(void);
+-#endif
+-asmlinkage void machine_check(void);
+-
++int panic_on_unrecovered_nmi;
+ int kstack_depth_to_print = 24;
+ static unsigned int code_bytes = 64;
++static int ignore_nmis;
++static int die_counter;
+
+ void printk_address(unsigned long address, int reliable)
+ {
+ #ifdef CONFIG_KALLSYMS
+- char namebuf[KSYM_NAME_LEN];
+ unsigned long offset = 0;
+ unsigned long symsize;
+ const char *symname;
+- char reliab[4] = "";
+- char *delim = ":";
+ char *modname;
++ char *delim = ":";
++ char namebuf[KSYM_NAME_LEN];
++ char reliab[4] = "";
+
+ symname = kallsyms_lookup(address, &symsize, &offset,
+ &modname, namebuf);
+@@ -138,22 +117,23 @@ void printk_address(unsigned long addres
+ #endif
+ }
+
+-static inline int valid_stack_ptr(struct thread_info *tinfo, void *p, unsigned size)
++static inline int valid_stack_ptr(struct thread_info *tinfo,
++ void *p, unsigned int size)
+ {
+- return p > (void *)tinfo &&
+- p <= (void *)tinfo + THREAD_SIZE - size;
++ void *t = tinfo;
++ return p > t && p <= t + THREAD_SIZE - size;
+ }
+
+ /* The form of the top of the frame on the stack */
+ struct stack_frame {
+- struct stack_frame *next_frame;
+- unsigned long return_address;
++ struct stack_frame *next_frame;
++ unsigned long return_address;
+ };
+
+ static inline unsigned long
+ print_context_stack(struct thread_info *tinfo,
+- unsigned long *stack, unsigned long bp,
+- const struct stacktrace_ops *ops, void *data)
++ unsigned long *stack, unsigned long bp,
++ const struct stacktrace_ops *ops, void *data)
+ {
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+@@ -175,8 +155,6 @@ print_context_stack(struct thread_info *
+ return bp;
+ }
+
+-#define MSG(msg) ops->warning(data, msg)
+-
+ void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+@@ -186,7 +164,6 @@ void dump_trace(struct task_struct *task
+
+ if (!stack) {
+ unsigned long dummy;
+-
+ stack = &dummy;
+ if (task != current)
+ stack = (unsigned long *)task->thread.sp;
+@@ -204,7 +181,7 @@ void dump_trace(struct task_struct *task
+ }
+ #endif
+
+- while (1) {
++ for (;;) {
+ struct thread_info *context;
+
+ context = (struct thread_info *)
+@@ -256,15 +233,15 @@ static void print_trace_address(void *da
+ }
+
+ static const struct stacktrace_ops print_trace_ops = {
+- .warning = print_trace_warning,
+- .warning_symbol = print_trace_warning_symbol,
+- .stack = print_trace_stack,
+- .address = print_trace_address,
++ .warning = print_trace_warning,
++ .warning_symbol = print_trace_warning_symbol,
++ .stack = print_trace_stack,
++ .address = print_trace_address,
+ };
+
+ static void
+ show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+- unsigned long *stack, unsigned long bp, char *log_lvl)
++ unsigned long *stack, unsigned long bp, char *log_lvl)
+ {
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+ printk("%s =======================\n", log_lvl);
+@@ -359,15 +336,14 @@ void show_registers(struct pt_regs *regs
+ printk(KERN_EMERG "Code: ");
+
+ ip = (u8 *)regs->ip - code_prologue;
+- if (ip < (u8 *)PAGE_OFFSET ||
+- probe_kernel_address(ip, c)) {
++ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+ /* try starting at EIP */
+ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+ for (i = 0; i < code_len; i++, ip++) {
+ if (ip < (u8 *)PAGE_OFFSET ||
+- probe_kernel_address(ip, c)) {
++ probe_kernel_address(ip, c)) {
+ printk(" Bad EIP value.");
+ break;
+ }
+@@ -392,7 +368,53 @@ int is_valid_bugaddr(unsigned long ip)
+ return ud2 == 0x0b0f;
+ }
+
+-static int die_counter;
++static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
++static int die_owner = -1;
++static unsigned int die_nest_count;
++
++unsigned __kprobes long oops_begin(void)
++{
++ unsigned long flags;
++
++ oops_enter();
++
++ if (die_owner != raw_smp_processor_id()) {
++ console_verbose();
++ raw_local_irq_save(flags);
++ __raw_spin_lock(&die_lock);
++ die_owner = smp_processor_id();
++ die_nest_count = 0;
++ bust_spinlocks(1);
++ } else {
++ raw_local_irq_save(flags);
++ }
++ die_nest_count++;
++ return flags;
++}
++
++void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
++{
++ bust_spinlocks(0);
++ die_owner = -1;
++ add_taint(TAINT_DIE);
++ __raw_spin_unlock(&die_lock);
++ raw_local_irq_restore(flags);
++
++ if (!regs)
++ return;
++
++ if (kexec_should_crash(current))
++ crash_kexec(regs);
++
++ if (in_interrupt())
++ panic("Fatal exception in interrupt");
++
++ if (panic_on_oops)
++ panic("Fatal exception");
++
++ oops_exit();
++ do_exit(signr);
++}
+
+ int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+ {
+@@ -410,26 +432,22 @@ int __kprobes __die(const char *str, str
+ printk("DEBUG_PAGEALLOC");
+ #endif
+ printk("\n");
+-
+ if (notify_die(DIE_OOPS, str, regs, err,
+- current->thread.trap_no, SIGSEGV) != NOTIFY_STOP) {
++ current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
++ return 1;
+
+- show_registers(regs);
+- /* Executive summary in case the oops scrolled away */
+- sp = (unsigned long) (®s->sp);
+- savesegment(ss, ss);
+- if (user_mode(regs)) {
+- sp = regs->sp;
+- ss = regs->ss & 0xffff;
+- }
+- printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
+- print_symbol("%s", regs->ip);
+- printk(" SS:ESP %04x:%08lx\n", ss, sp);
+-
+- return 0;
+- }
+-
+- return 1;
++ show_registers(regs);
++ /* Executive summary in case the oops scrolled away */
++ sp = (unsigned long) (®s->sp);
++ savesegment(ss, ss);
++ if (user_mode(regs)) {
++ sp = regs->sp;
++ ss = regs->ss & 0xffff;
++ }
++ printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
++ print_symbol("%s", regs->ip);
++ printk(" SS:ESP %04x:%08lx\n", ss, sp);
++ return 0;
+ }
+
+ /*
+@@ -438,31 +456,9 @@ int __kprobes __die(const char *str, str
+ */
+ void die(const char *str, struct pt_regs *regs, long err)
+ {
+- static struct {
+- raw_spinlock_t lock;
+- u32 lock_owner;
+- int lock_owner_depth;
+- } die = {
+- .lock = __RAW_SPIN_LOCK_UNLOCKED,
+- .lock_owner = -1,
+- .lock_owner_depth = 0
+- };
+- unsigned long flags;
+-
+- oops_enter();
++ unsigned long flags = oops_begin();
+
+- if (die.lock_owner != raw_smp_processor_id()) {
+- console_verbose();
+- raw_local_irq_save(flags);
+- __raw_spin_lock(&die.lock);
+- die.lock_owner = smp_processor_id();
+- die.lock_owner_depth = 0;
+- bust_spinlocks(1);
+- } else {
+- raw_local_irq_save(flags);
+- }
+-
+- if (++die.lock_owner_depth < 3) {
++ if (die_nest_count < 3) {
+ report_bug(regs->ip, regs);
+
+ if (__die(str, regs, err))
+@@ -471,26 +467,7 @@ void die(const char *str, struct pt_regs
+ printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
+ }
+
+- bust_spinlocks(0);
+- die.lock_owner = -1;
+- add_taint(TAINT_DIE);
+- __raw_spin_unlock(&die.lock);
+- raw_local_irq_restore(flags);
+-
+- if (!regs)
+- return;
+-
+- if (kexec_should_crash(current))
+- crash_kexec(regs);
+-
+- if (in_interrupt())
+- panic("Fatal exception in interrupt");
+-
+- if (panic_on_oops)
+- panic("Fatal exception");
+-
+- oops_exit();
+- do_exit(SIGSEGV);
++ oops_end(flags, regs, SIGSEGV);
+ }
+
+ static inline void
+@@ -554,7 +531,7 @@ void do_##name(struct pt_regs *regs, lon
+ { \
+ trace_hardirqs_fixup(); \
+ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
++ == NOTIFY_STOP) \
+ return; \
+ do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
+ }
+@@ -570,7 +547,7 @@ void do_##name(struct pt_regs *regs, lon
+ info.si_code = sicode; \
+ info.si_addr = (void __user *)siaddr; \
+ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
++ == NOTIFY_STOP) \
+ return; \
+ do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
+ }
+@@ -579,7 +556,7 @@ void do_##name(struct pt_regs *regs, lon
+ void do_##name(struct pt_regs *regs, long error_code) \
+ { \
+ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
++ == NOTIFY_STOP) \
+ return; \
+ do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
+ }
+@@ -594,28 +571,29 @@ void do_##name(struct pt_regs *regs, lon
+ info.si_addr = (void __user *)siaddr; \
+ trace_hardirqs_fixup(); \
+ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
++ == NOTIFY_STOP) \
+ return; \
+ do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
+ }
+
+-DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
++DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+ #ifndef CONFIG_KPROBES
+ DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
+ #endif
+ DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
+ DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds)
+-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
+-DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
++DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
++DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
+ DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
+-DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+-DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
++DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
++DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
+ DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
+ DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)
+
+-void __kprobes do_general_protection(struct pt_regs * regs,
+- long error_code)
++void __kprobes
++do_general_protection(struct pt_regs *regs, long error_code)
+ {
++ struct task_struct *tsk;
+ struct thread_struct *thread;
+
+ thread = ¤t->thread;
+@@ -623,23 +601,24 @@ void __kprobes do_general_protection(str
+ if (regs->flags & X86_VM_MASK)
+ goto gp_in_vm86;
+
++ tsk = current;
+ if (!user_mode(regs))
+ goto gp_in_kernel;
+
+- current->thread.error_code = error_code;
+- current->thread.trap_no = 13;
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 13;
+
+- if (show_unhandled_signals && unhandled_signal(current, SIGSEGV) &&
+- printk_ratelimit()) {
++ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
++ printk_ratelimit()) {
+ printk(KERN_INFO
+- "%s[%d] general protection ip:%lx sp:%lx error:%lx",
+- current->comm, task_pid_nr(current),
+- regs->ip, regs->sp, error_code);
++ "%s[%d] general protection ip:%lx sp:%lx error:%lx",
++ tsk->comm, task_pid_nr(tsk),
++ regs->ip, regs->sp, error_code);
+ print_vma_addr(" in ", regs->ip);
+ printk("\n");
+ }
+
+- force_sig(SIGSEGV, current);
++ force_sig(SIGSEGV, tsk);
+ return;
+
+ gp_in_vm86:
+@@ -648,14 +627,15 @@ gp_in_vm86:
+ return;
+
+ gp_in_kernel:
+- if (!fixup_exception(regs)) {
+- current->thread.error_code = error_code;
+- current->thread.trap_no = 13;
+- if (notify_die(DIE_GPF, "general protection fault", regs,
++ if (fixup_exception(regs))
++ return;
++
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 13;
++ if (notify_die(DIE_GPF, "general protection fault", regs,
+ error_code, 13, SIGSEGV) == NOTIFY_STOP)
+- return;
+- die("general protection fault", regs, error_code);
+- }
++ return;
++ die("general protection fault", regs, error_code);
+ }
+
+ static notrace __kprobes void
+@@ -722,9 +702,9 @@ unknown_nmi_error(unsigned char reason,
+
+ static DEFINE_SPINLOCK(nmi_print_lock);
+
+-void notrace __kprobes die_nmi(struct pt_regs *regs, const char *msg)
++void notrace __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
+ {
+- if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 2, SIGINT) == NOTIFY_STOP)
++ if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+ return;
+
+ spin_lock(&nmi_print_lock);
+@@ -733,10 +713,12 @@ void notrace __kprobes die_nmi(struct pt
+ * to get a message out:
+ */
+ bust_spinlocks(1);
+- printk(KERN_EMERG "%s", msg);
++ printk(KERN_EMERG "%s", str);
+ printk(" on CPU%d, ip %08lx, registers:\n",
+ smp_processor_id(), regs->ip);
+ show_registers(regs);
++ if (do_panic)
++ panic("Non maskable interrupt");
+ console_silent();
+ spin_unlock(&nmi_print_lock);
+ bust_spinlocks(0);
+@@ -756,14 +738,17 @@ void notrace __kprobes die_nmi(struct pt
+ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
+ {
+ unsigned char reason = 0;
++ int cpu;
+
+- /* Only the BSP gets external NMIs from the system: */
+- if (!smp_processor_id())
++ cpu = smp_processor_id();
++
++ /* Only the BSP gets external NMIs from the system. */
++ if (!cpu)
+ reason = get_nmi_reason();
+
+ if (!(reason & 0xc0)) {
+ if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
+- == NOTIFY_STOP)
++ == NOTIFY_STOP)
+ return;
+ #ifdef CONFIG_X86_LOCAL_APIC
+ /*
+@@ -772,7 +757,7 @@ static notrace __kprobes void default_do
+ */
+ if (nmi_watchdog_tick(regs, reason))
+ return;
+- if (!do_nmi_callback(regs, smp_processor_id()))
++ if (!do_nmi_callback(regs, cpu))
+ unknown_nmi_error(reason, regs);
+ #else
+ unknown_nmi_error(reason, regs);
+@@ -782,6 +767,8 @@ static notrace __kprobes void default_do
+ }
+ if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
+ return;
++
++ /* AK: following checks seem to be broken on modern chipsets. FIXME */
+ if (reason & 0x80)
+ mem_parity_error(reason, regs);
+ if (reason & 0x40)
+@@ -793,8 +780,6 @@ static notrace __kprobes void default_do
+ reassert_nmi();
+ }
+
+-static int ignore_nmis;
+-
+ notrace __kprobes void do_nmi(struct pt_regs *regs, long error_code)
+ {
+ int cpu;
+@@ -879,7 +864,7 @@ void __kprobes do_debug(struct pt_regs *
+ tsk->thread.debugctlmsr = 0;
+
+ if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
+- SIGTRAP) == NOTIFY_STOP)
++ SIGTRAP) == NOTIFY_STOP)
+ return;
+ /* It's safe to allow irq's after DR6 has been saved */
+ if (regs->flags & X86_EFLAGS_IF)
+@@ -940,9 +925,8 @@ clear_TF_reenable:
+ void math_error(void __user *ip)
+ {
+ struct task_struct *task;
+- unsigned short cwd;
+- unsigned short swd;
+ siginfo_t info;
++ unsigned short cwd, swd;
+
+ /*
+ * Save the info for the exception handler and clear the error.
+@@ -961,7 +945,7 @@ void math_error(void __user *ip)
+ * C1 reg you need in case of a stack fault, 0x040 is the stack
+ * fault bit. We should only be taking one exception at a time,
+ * so if this combination doesn't produce any single exception,
+- * then we have a bad program that isn't syncronizing its FPU usage
++ * then we have a bad program that isn't synchronizing its FPU usage
+ * and it will suffer the consequences since we won't be able to
+ * fully reproduce the context of the exception
+ */
+@@ -970,7 +954,7 @@ void math_error(void __user *ip)
+ switch (swd & ~cwd & 0x3f) {
+ case 0x000: /* No unmasked exception */
+ return;
+- default: /* Multiple exceptions */
++ default: /* Multiple exceptions */
+ break;
+ case 0x001: /* Invalid Op */
+ /*
+@@ -1006,8 +990,8 @@ void do_coprocessor_error(struct pt_regs
+ static void simd_math_error(void __user *ip)
+ {
+ struct task_struct *task;
+- unsigned short mxcsr;
+ siginfo_t info;
++ unsigned short mxcsr;
+
+ /*
+ * Save the info for the exception handler and clear the error.
+@@ -1084,7 +1068,7 @@ void do_spurious_interrupt_bug(struct pt
+
+ unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
+ {
+- struct desc_struct *gdt = __get_cpu_var(gdt_page).gdt;
++ struct desc_struct *gdt = get_cpu_gdt_table(smp_processor_id());
+ unsigned long base = (kesp - uesp) & -THREAD_SIZE;
+ unsigned long new_kesp = kesp - base;
+ unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT;
+Index: head-2008-12-01/arch/x86/kernel/traps_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/traps_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -10,73 +10,56 @@
+ * 'Traps.c' handles hardware traps and faults after we have saved some
+ * state in 'entry.S'.
+ */
+-#include <linux/sched.h>
++#include <linux/moduleparam.h>
++#include <linux/interrupt.h>
++#include <linux/kallsyms.h>
++#include <linux/spinlock.h>
++#include <linux/kprobes.h>
++#include <linux/uaccess.h>
++#include <linux/utsname.h>
++#include <linux/kdebug.h>
+ #include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/ptrace.h>
+ #include <linux/string.h>
++#include <linux/unwind.h>
++#include <linux/delay.h>
+ #include <linux/errno.h>
+-#include <linux/ptrace.h>
++#include <linux/kexec.h>
++#include <linux/sched.h>
+ #include <linux/timer.h>
+-#include <linux/mm.h>
+ #include <linux/init.h>
+-#include <linux/delay.h>
+-#include <linux/spinlock.h>
+-#include <linux/interrupt.h>
+-#include <linux/kallsyms.h>
+-#include <linux/module.h>
+-#include <linux/moduleparam.h>
+-#include <linux/nmi.h>
+-#include <linux/kprobes.h>
+-#include <linux/kexec.h>
+-#include <linux/unwind.h>
+-#include <linux/uaccess.h>
+ #include <linux/bug.h>
+-#include <linux/kdebug.h>
+-#include <linux/utsname.h>
+-
+-#include <mach_traps.h>
++#include <linux/nmi.h>
++#include <linux/mm.h>
+
+ #if defined(CONFIG_EDAC)
+ #include <linux/edac.h>
+ #endif
+
+-#include <asm/system.h>
+-#include <asm/io.h>
+-#include <asm/atomic.h>
++#include <asm/stacktrace.h>
++#include <asm/processor.h>
+ #include <asm/debugreg.h>
++#include <asm/atomic.h>
++#include <asm/system.h>
++#include <asm/unwind.h>
+ #include <asm/desc.h>
+ #include <asm/i387.h>
+-#include <asm/processor.h>
+-#include <asm/unwind.h>
++#include <asm/nmi.h>
+ #include <asm/smp.h>
++#include <asm/io.h>
+ #include <asm/pgalloc.h>
+-#include <asm/pda.h>
+ #include <asm/proto.h>
+-#include <asm/nmi.h>
+-#include <asm/stacktrace.h>
++#include <asm/pda.h>
++#include <asm/traps.h>
+
+-asmlinkage void divide_error(void);
+-asmlinkage void debug(void);
+-asmlinkage void nmi(void);
+-asmlinkage void int3(void);
+-asmlinkage void overflow(void);
+-asmlinkage void bounds(void);
+-asmlinkage void invalid_op(void);
+-asmlinkage void device_not_available(void);
+-asmlinkage void double_fault(void);
+-asmlinkage void coprocessor_segment_overrun(void);
+-asmlinkage void invalid_TSS(void);
+-asmlinkage void segment_not_present(void);
+-asmlinkage void stack_segment(void);
+-asmlinkage void general_protection(void);
+-asmlinkage void page_fault(void);
+-asmlinkage void coprocessor_error(void);
+-asmlinkage void simd_coprocessor_error(void);
+-asmlinkage void reserved(void);
+-asmlinkage void alignment_check(void);
+-asmlinkage void machine_check(void);
+-asmlinkage void spurious_interrupt_bug(void);
++#include <mach_traps.h>
+
++int panic_on_unrecovered_nmi;
++int kstack_depth_to_print = 12;
+ static unsigned int code_bytes = 64;
++static int ignore_nmis;
++static int die_counter;
+
+ static inline void conditional_sti(struct pt_regs *regs)
+ {
+@@ -100,34 +83,9 @@ static inline void preempt_conditional_c
+ dec_preempt_count();
+ }
+
+-int kstack_depth_to_print = 12;
+-
+ void printk_address(unsigned long address, int reliable)
+ {
+-#ifdef CONFIG_KALLSYMS
+- unsigned long offset = 0, symsize;
+- const char *symname;
+- char *modname;
+- char *delim = ":";
+- char namebuf[KSYM_NAME_LEN];
+- char reliab[4] = "";
+-
+- symname = kallsyms_lookup(address, &symsize, &offset,
+- &modname, namebuf);
+- if (!symname) {
+- printk(" [<%016lx>]\n", address);
+- return;
+- }
+- if (!reliable)
+- strcpy(reliab, "? ");
+-
+- if (!modname)
+- modname = delim = "";
+- printk(" [<%016lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
+- address, reliab, delim, modname, delim, symname, offset, symsize);
+-#else
+- printk(" [<%016lx>]\n", address);
+-#endif
++ printk(" [<%016lx>] %s%pS\n", address, reliable ? "": "? ", (void *) address);
+ }
+
+ static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
+@@ -206,8 +164,6 @@ static unsigned long *in_exception_stack
+ return NULL;
+ }
+
+-#define MSG(txt) ops->warning(data, txt)
+-
+ /*
+ * x86-64 can have up to three kernel stacks:
+ * process stack
+@@ -234,11 +190,11 @@ struct stack_frame {
+ unsigned long return_address;
+ };
+
+-
+-static inline unsigned long print_context_stack(struct thread_info *tinfo,
+- unsigned long *stack, unsigned long bp,
+- const struct stacktrace_ops *ops, void *data,
+- unsigned long *end)
++static inline unsigned long
++print_context_stack(struct thread_info *tinfo,
++ unsigned long *stack, unsigned long bp,
++ const struct stacktrace_ops *ops, void *data,
++ unsigned long *end)
+ {
+ struct stack_frame *frame = (struct stack_frame *)bp;
+
+@@ -260,7 +216,7 @@ static inline unsigned long print_contex
+ return bp;
+ }
+
+-void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
++void dump_trace(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp,
+ const struct stacktrace_ops *ops, void *data)
+ {
+@@ -269,36 +225,34 @@ void dump_trace(struct task_struct *tsk,
+ unsigned used = 0;
+ struct thread_info *tinfo;
+
+- if (!tsk)
+- tsk = current;
+- tinfo = task_thread_info(tsk);
++ if (!task)
++ task = current;
+
+ if (!stack) {
+ unsigned long dummy;
+ stack = &dummy;
+- if (tsk && tsk != current)
+- stack = (unsigned long *)tsk->thread.sp;
++ if (task && task != current)
++ stack = (unsigned long *)task->thread.sp;
+ }
+
+ #ifdef CONFIG_FRAME_POINTER
+ if (!bp) {
+- if (tsk == current) {
++ if (task == current) {
+ /* Grab bp right from our regs */
+- asm("movq %%rbp, %0" : "=r" (bp):);
++ asm("movq %%rbp, %0" : "=r" (bp) :);
+ } else {
+ /* bp is the last reg pushed by switch_to */
+- bp = *(unsigned long *) tsk->thread.sp;
++ bp = *(unsigned long *) task->thread.sp;
+ }
+ }
+ #endif
+
+-
+-
+ /*
+ * Print function call entries in all stacks, starting at the
+ * current stack address. If the stacks consist of nested
+ * exceptions
+ */
++ tinfo = task_thread_info(task);
+ for (;;) {
+ char *id;
+ unsigned long *estack_end;
+@@ -383,18 +337,24 @@ static const struct stacktrace_ops print
+ .address = print_trace_address,
+ };
+
+-void
+-show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long *stack,
+- unsigned long bp)
++static void
++show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
++ unsigned long *stack, unsigned long bp, char *log_lvl)
+ {
+ printk("\nCall Trace:\n");
+- dump_trace(tsk, regs, stack, bp, &print_trace_ops, NULL);
++ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+ printk("\n");
+ }
+
++void show_trace(struct task_struct *task, struct pt_regs *regs,
++ unsigned long *stack, unsigned long bp)
++{
++ show_trace_log_lvl(task, regs, stack, bp, "");
++}
++
+ static void
+-_show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *sp,
+- unsigned long bp)
++show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
++ unsigned long *sp, unsigned long bp, char *log_lvl)
+ {
+ unsigned long *stack;
+ int i;
+@@ -406,14 +366,14 @@ _show_stack(struct task_struct *tsk, str
+ // back trace for this cpu.
+
+ if (sp == NULL) {
+- if (tsk)
+- sp = (unsigned long *)tsk->thread.sp;
++ if (task)
++ sp = (unsigned long *)task->thread.sp;
+ else
+ sp = (unsigned long *)&sp;
+ }
+
+ stack = sp;
+- for(i=0; i < kstack_depth_to_print; i++) {
++ for (i = 0; i < kstack_depth_to_print; i++) {
+ if (stack >= irqstack && stack <= irqstack_end) {
+ if (stack == irqstack_end) {
+ stack = (unsigned long *) (irqstack_end[-1]);
+@@ -428,12 +388,12 @@ _show_stack(struct task_struct *tsk, str
+ printk(" %016lx", *stack++);
+ touch_nmi_watchdog();
+ }
+- show_trace(tsk, regs, sp, bp);
++ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+ }
+
+-void show_stack(struct task_struct *tsk, unsigned long * sp)
++void show_stack(struct task_struct *task, unsigned long *sp)
+ {
+- _show_stack(tsk, NULL, sp, 0);
++ show_stack_log_lvl(task, NULL, sp, 0, "");
+ }
+
+ /*
+@@ -441,8 +401,8 @@ void show_stack(struct task_struct *tsk,
+ */
+ void dump_stack(void)
+ {
+- unsigned long dummy;
+ unsigned long bp = 0;
++ unsigned long stack;
+
+ #ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+@@ -454,7 +414,7 @@ void dump_stack(void)
+ init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version);
+- show_trace(NULL, NULL, &dummy, bp);
++ show_trace(NULL, NULL, &stack, bp);
+ }
+
+ EXPORT_SYMBOL(dump_stack);
+@@ -465,12 +425,8 @@ void show_registers(struct pt_regs *regs
+ unsigned long sp;
+ const int cpu = smp_processor_id();
+ struct task_struct *cur = cpu_pda(cpu)->pcurrent;
+- u8 *ip;
+- unsigned int code_prologue = code_bytes * 43 / 64;
+- unsigned int code_len = code_bytes;
+
+ sp = regs->sp;
+- ip = (u8 *) regs->ip - code_prologue;
+ printk("CPU %d ", cpu);
+ __show_regs(regs);
+ printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
+@@ -481,15 +437,22 @@ void show_registers(struct pt_regs *regs
+ * time of the fault..
+ */
+ if (!user_mode(regs)) {
++ unsigned int code_prologue = code_bytes * 43 / 64;
++ unsigned int code_len = code_bytes;
+ unsigned char c;
++ u8 *ip;
++
+ printk("Stack: ");
+- _show_stack(NULL, regs, (unsigned long *)sp, regs->bp);
++ show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
++ regs->bp, "");
+ printk("\n");
+
+ printk(KERN_EMERG "Code: ");
++
++ ip = (u8 *)regs->ip - code_prologue;
+ if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+ /* try starting at RIP */
+- ip = (u8 *) regs->ip;
++ ip = (u8 *)regs->ip;
+ code_len = code_len - code_prologue + 1;
+ }
+ for (i = 0; i < code_len; i++, ip++) {
+@@ -505,7 +468,7 @@ void show_registers(struct pt_regs *regs
+ }
+ }
+ printk("\n");
+-}
++}
+
+ int is_valid_bugaddr(unsigned long ip)
+ {
+@@ -545,7 +508,7 @@ unsigned __kprobes long oops_begin(void)
+ }
+
+ void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+-{
++{
+ die_owner = -1;
+ bust_spinlocks(0);
+ die_nest_count--;
+@@ -563,10 +526,9 @@ void __kprobes oops_end(unsigned long fl
+ do_exit(signr);
+ }
+
+-int __kprobes __die(const char * str, struct pt_regs * regs, long err)
++int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+ {
+- static int die_counter;
+- printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff,++die_counter);
++ printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff, ++die_counter);
+ #ifdef CONFIG_PREEMPT
+ printk("PREEMPT ");
+ #endif
+@@ -577,8 +539,10 @@ int __kprobes __die(const char * str, st
+ printk("DEBUG_PAGEALLOC");
+ #endif
+ printk("\n");
+- if (notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
++ if (notify_die(DIE_OOPS, str, regs, err,
++ current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+ return 1;
++
+ show_registers(regs);
+ add_taint(TAINT_DIE);
+ /* Executive summary in case the oops scrolled away */
+@@ -590,7 +554,7 @@ int __kprobes __die(const char * str, st
+ return 0;
+ }
+
+-void die(const char * str, struct pt_regs * regs, long err)
++void die(const char *str, struct pt_regs *regs, long err)
+ {
+ unsigned long flags = oops_begin();
+
+@@ -608,8 +572,7 @@ die_nmi(char *str, struct pt_regs *regs,
+ {
+ unsigned long flags;
+
+- if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) ==
+- NOTIFY_STOP)
++ if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+ return;
+
+ flags = oops_begin();
+@@ -617,7 +580,9 @@ die_nmi(char *str, struct pt_regs *regs,
+ * We are in trouble anyway, lets at least try
+ * to get a message out.
+ */
+- printk(str, smp_processor_id());
++ printk(KERN_EMERG "%s", str);
++ printk(" on CPU%d, ip %08lx, registers:\n",
++ smp_processor_id(), regs->ip);
+ show_registers(regs);
+ if (kexec_should_crash(current))
+ crash_kexec(regs);
+@@ -630,44 +595,44 @@ die_nmi(char *str, struct pt_regs *regs,
+ }
+ #endif
+
+-static void __kprobes do_trap(int trapnr, int signr, char *str,
+- struct pt_regs * regs, long error_code,
+- siginfo_t *info)
++static void __kprobes
++do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
++ long error_code, siginfo_t *info)
+ {
+ struct task_struct *tsk = current;
+
+- if (user_mode(regs)) {
+- /*
+- * We want error_code and trap_no set for userspace
+- * faults and kernelspace faults which result in
+- * die(), but not kernelspace faults which are fixed
+- * up. die() gives the process no chance to handle
+- * the signal and notice the kernel fault information,
+- * so that won't result in polluting the information
+- * about previously queued, but not yet delivered,
+- * faults. See also do_general_protection below.
+- */
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = trapnr;
++ if (!user_mode(regs))
++ goto kernel_trap;
+
+- if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
+- printk_ratelimit()) {
+- printk(KERN_INFO
+- "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
+- tsk->comm, tsk->pid, str,
+- regs->ip, regs->sp, error_code);
+- print_vma_addr(" in ", regs->ip);
+- printk("\n");
+- }
++ /*
++ * We want error_code and trap_no set for userspace faults and
++ * kernelspace faults which result in die(), but not
++ * kernelspace faults which are fixed up. die() gives the
++ * process no chance to handle the signal and notice the
++ * kernel fault information, so that won't result in polluting
++ * the information about previously queued, but not yet
++ * delivered, faults. See also do_general_protection below.
++ */
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = trapnr;
+
+- if (info)
+- force_sig_info(signr, info, tsk);
+- else
+- force_sig(signr, tsk);
+- return;
++ if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
++ printk_ratelimit()) {
++ printk(KERN_INFO
++ "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
++ tsk->comm, tsk->pid, str,
++ regs->ip, regs->sp, error_code);
++ print_vma_addr(" in ", regs->ip);
++ printk("\n");
+ }
+
++ if (info)
++ force_sig_info(signr, info, tsk);
++ else
++ force_sig(signr, tsk);
++ return;
+
++kernel_trap:
+ if (!fixup_exception(regs)) {
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_no = trapnr;
+@@ -677,41 +642,39 @@ static void __kprobes do_trap(int trapnr
+ }
+
+ #define DO_ERROR(trapnr, signr, str, name) \
+-asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
+-{ \
+- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
+- return; \
++asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
++{ \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
+ conditional_sti(regs); \
+- do_trap(trapnr, signr, str, regs, error_code, NULL); \
++ do_trap(trapnr, signr, str, regs, error_code, NULL); \
+ }
+
+-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
+-asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
+-{ \
+- siginfo_t info; \
+- info.si_signo = signr; \
+- info.si_errno = 0; \
+- info.si_code = sicode; \
+- info.si_addr = (void __user *)siaddr; \
+- trace_hardirqs_fixup(); \
+- if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
+- == NOTIFY_STOP) \
+- return; \
++#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
++asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
++{ \
++ siginfo_t info; \
++ info.si_signo = signr; \
++ info.si_errno = 0; \
++ info.si_code = sicode; \
++ info.si_addr = (void __user *)siaddr; \
++ trace_hardirqs_fixup(); \
++ if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
++ == NOTIFY_STOP) \
++ return; \
+ conditional_sti(regs); \
+- do_trap(trapnr, signr, str, regs, error_code, &info); \
++ do_trap(trapnr, signr, str, regs, error_code, &info); \
+ }
+
+-DO_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+-DO_ERROR( 4, SIGSEGV, "overflow", overflow)
+-DO_ERROR( 5, SIGSEGV, "bounds", bounds)
+-DO_ERROR_INFO( 6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
+-DO_ERROR( 7, SIGSEGV, "device not available", device_not_available)
+-DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
++DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
++DO_ERROR(4, SIGSEGV, "overflow", overflow)
++DO_ERROR(5, SIGSEGV, "bounds", bounds)
++DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
++DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
+ DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
+-DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
++DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+ DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
+-DO_ERROR(18, SIGSEGV, "reserved", reserved)
+
+ /* Runs on IST stack */
+ asmlinkage void do_stack_segment(struct pt_regs *regs, long error_code)
+@@ -741,31 +704,34 @@ asmlinkage void do_double_fault(struct p
+ die(str, regs, error_code);
+ }
+
+-asmlinkage void __kprobes do_general_protection(struct pt_regs * regs,
+- long error_code)
++asmlinkage void __kprobes
++do_general_protection(struct pt_regs *regs, long error_code)
+ {
+- struct task_struct *tsk = current;
++ struct task_struct *tsk;
+
+ conditional_sti(regs);
+
+- if (user_mode(regs)) {
+- tsk->thread.error_code = error_code;
+- tsk->thread.trap_no = 13;
++ tsk = current;
++ if (!user_mode(regs))
++ goto gp_in_kernel;
+
+- if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+- printk_ratelimit()) {
+- printk(KERN_INFO
+- "%s[%d] general protection ip:%lx sp:%lx error:%lx",
+- tsk->comm, tsk->pid,
+- regs->ip, regs->sp, error_code);
+- print_vma_addr(" in ", regs->ip);
+- printk("\n");
+- }
++ tsk->thread.error_code = error_code;
++ tsk->thread.trap_no = 13;
+
+- force_sig(SIGSEGV, tsk);
+- return;
+- }
++ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
++ printk_ratelimit()) {
++ printk(KERN_INFO
++ "%s[%d] general protection ip:%lx sp:%lx error:%lx",
++ tsk->comm, tsk->pid,
++ regs->ip, regs->sp, error_code);
++ print_vma_addr(" in ", regs->ip);
++ printk("\n");
++ }
+
++ force_sig(SIGSEGV, tsk);
++ return;
++
++gp_in_kernel:
+ if (fixup_exception(regs))
+ return;
+
+@@ -778,14 +744,14 @@ asmlinkage void __kprobes do_general_pro
+ }
+
+ static notrace __kprobes void
+-mem_parity_error(unsigned char reason, struct pt_regs * regs)
++mem_parity_error(unsigned char reason, struct pt_regs *regs)
+ {
+ printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
+ reason);
+ printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
+
+ #if defined(CONFIG_EDAC)
+- if(edac_handler_set()) {
++ if (edac_handler_set()) {
+ edac_atomic_assert_error();
+ return;
+ }
+@@ -801,7 +767,7 @@ mem_parity_error(unsigned char reason, s
+ }
+
+ static notrace __kprobes void
+-io_check_error(unsigned char reason, struct pt_regs * regs)
++io_check_error(unsigned char reason, struct pt_regs *regs)
+ {
+ printk("NMI: IOCK error (debug interrupt?)\n");
+ show_registers(regs);
+@@ -827,14 +793,14 @@ unknown_nmi_error(unsigned char reason,
+
+ /* Runs on IST stack. This code must keep interrupts off all the time.
+ Nested NMIs are prevented by the CPU. */
+-asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
++asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
+ {
+ unsigned char reason = 0;
+ int cpu;
+
+ cpu = smp_processor_id();
+
+- /* Only the BSP gets external NMIs from the system. */
++ /* Only the BSP gets external NMIs from the system. */
+ if (!cpu)
+ reason = get_nmi_reason();
+
+@@ -847,33 +813,58 @@ asmlinkage notrace __kprobes void defau
+ * Ok, so this is none of the documented NMI sources,
+ * so it must be the NMI watchdog.
+ */
+- if (nmi_watchdog_tick(regs,reason))
++ if (nmi_watchdog_tick(regs, reason))
+ return;
+ #endif
+- if (!do_nmi_callback(regs,cpu))
++ if (!do_nmi_callback(regs, cpu))
+ unknown_nmi_error(reason, regs);
+
+ return;
+ }
+ if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
+- return;
++ return;
+
+ /* AK: following checks seem to be broken on modern chipsets. FIXME */
+-
+ if (reason & 0x80)
+ mem_parity_error(reason, regs);
+ if (reason & 0x40)
+ io_check_error(reason, regs);
+ }
+
++asmlinkage notrace __kprobes void
++do_nmi(struct pt_regs *regs, long error_code)
++{
++ nmi_enter();
++
++ add_pda(__nmi_count, 1);
++
++ if (!ignore_nmis)
++ default_do_nmi(regs);
++
++ nmi_exit();
++}
++
++void stop_nmi(void)
++{
++ acpi_nmi_disable();
++ ignore_nmis++;
++}
++
++void restart_nmi(void)
++{
++ ignore_nmis--;
++ acpi_nmi_enable();
++}
++
+ /* runs on IST stack. */
+ asmlinkage void __kprobes do_int3(struct pt_regs * regs, long error_code)
+ {
+ trace_hardirqs_fixup();
+
+- if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) == NOTIFY_STOP) {
++ if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
++ == NOTIFY_STOP)
+ return;
+- }
++
+ preempt_conditional_sti(regs);
+ do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
+ preempt_conditional_cli(regs);
+@@ -904,8 +895,8 @@ asmlinkage __kprobes struct pt_regs *syn
+ asmlinkage void __kprobes do_debug(struct pt_regs * regs,
+ unsigned long error_code)
+ {
+- unsigned long condition;
+ struct task_struct *tsk = current;
++ unsigned long condition;
+ siginfo_t info;
+
+ trace_hardirqs_fixup();
+@@ -926,21 +917,19 @@ asmlinkage void __kprobes do_debug(struc
+
+ /* Mask out spurious debug traps due to lazy DR7 setting */
+ if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
+- if (!tsk->thread.debugreg7) {
++ if (!tsk->thread.debugreg7)
+ goto clear_dr7;
+- }
+ }
+
+ tsk->thread.debugreg6 = condition;
+
+-
+ /*
+ * Single-stepping through TF: make sure we ignore any events in
+ * kernel space (but re-enable TF when returning to user mode).
+ */
+ if (condition & DR_STEP) {
+- if (!user_mode(regs))
+- goto clear_TF_reenable;
++ if (!user_mode(regs))
++ goto clear_TF_reenable;
+ }
+
+ /* Ok, finally something we can handle */
+@@ -953,7 +942,7 @@ asmlinkage void __kprobes do_debug(struc
+ force_sig_info(SIGTRAP, &info, tsk);
+
+ clear_dr7:
+- set_debugreg(0UL, 7);
++ set_debugreg(0, 7);
+ preempt_conditional_cli(regs);
+ return;
+
+@@ -961,6 +950,7 @@ clear_TF_reenable:
+ set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
+ regs->flags &= ~X86_EFLAGS_TF;
+ preempt_conditional_cli(regs);
++ return;
+ }
+
+ static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
+@@ -983,7 +973,7 @@ static int kernel_math_error(struct pt_r
+ asmlinkage void do_coprocessor_error(struct pt_regs *regs)
+ {
+ void __user *ip = (void __user *)(regs->ip);
+- struct task_struct * task;
++ struct task_struct *task;
+ siginfo_t info;
+ unsigned short cwd, swd;
+
+@@ -1016,30 +1006,30 @@ asmlinkage void do_coprocessor_error(str
+ cwd = get_fpu_cwd(task);
+ swd = get_fpu_swd(task);
+ switch (swd & ~cwd & 0x3f) {
+- case 0x000:
+- default:
+- break;
+- case 0x001: /* Invalid Op */
+- /*
+- * swd & 0x240 == 0x040: Stack Underflow
+- * swd & 0x240 == 0x240: Stack Overflow
+- * User must clear the SF bit (0x40) if set
+- */
+- info.si_code = FPE_FLTINV;
+- break;
+- case 0x002: /* Denormalize */
+- case 0x010: /* Underflow */
+- info.si_code = FPE_FLTUND;
+- break;
+- case 0x004: /* Zero Divide */
+- info.si_code = FPE_FLTDIV;
+- break;
+- case 0x008: /* Overflow */
+- info.si_code = FPE_FLTOVF;
+- break;
+- case 0x020: /* Precision */
+- info.si_code = FPE_FLTRES;
+- break;
++ case 0x000: /* No unmasked exception */
++ default: /* Multiple exceptions */
++ break;
++ case 0x001: /* Invalid Op */
++ /*
++ * swd & 0x240 == 0x040: Stack Underflow
++ * swd & 0x240 == 0x240: Stack Overflow
++ * User must clear the SF bit (0x40) if set
++ */
++ info.si_code = FPE_FLTINV;
++ break;
++ case 0x002: /* Denormalize */
++ case 0x010: /* Underflow */
++ info.si_code = FPE_FLTUND;
++ break;
++ case 0x004: /* Zero Divide */
++ info.si_code = FPE_FLTDIV;
++ break;
++ case 0x008: /* Overflow */
++ info.si_code = FPE_FLTOVF;
++ break;
++ case 0x020: /* Precision */
++ info.si_code = FPE_FLTRES;
++ break;
+ }
+ force_sig_info(SIGFPE, &info, task);
+ }
+@@ -1052,7 +1042,7 @@ asmlinkage void bad_intr(void)
+ asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
+ {
+ void __user *ip = (void __user *)(regs->ip);
+- struct task_struct * task;
++ struct task_struct *task;
+ siginfo_t info;
+ unsigned short mxcsr;
+
+@@ -1080,25 +1070,25 @@ asmlinkage void do_simd_coprocessor_erro
+ */
+ mxcsr = get_fpu_mxcsr(task);
+ switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
+- case 0x000:
+- default:
+- break;
+- case 0x001: /* Invalid Op */
+- info.si_code = FPE_FLTINV;
+- break;
+- case 0x002: /* Denormalize */
+- case 0x010: /* Underflow */
+- info.si_code = FPE_FLTUND;
+- break;
+- case 0x004: /* Zero Divide */
+- info.si_code = FPE_FLTDIV;
+- break;
+- case 0x008: /* Overflow */
+- info.si_code = FPE_FLTOVF;
+- break;
+- case 0x020: /* Precision */
+- info.si_code = FPE_FLTRES;
+- break;
++ case 0x000:
++ default:
++ break;
++ case 0x001: /* Invalid Op */
++ info.si_code = FPE_FLTINV;
++ break;
++ case 0x002: /* Denormalize */
++ case 0x010: /* Underflow */
++ info.si_code = FPE_FLTUND;
++ break;
++ case 0x004: /* Zero Divide */
++ info.si_code = FPE_FLTDIV;
++ break;
++ case 0x008: /* Overflow */
++ info.si_code = FPE_FLTOVF;
++ break;
++ case 0x020: /* Precision */
++ info.si_code = FPE_FLTRES;
++ break;
+ }
+ force_sig_info(SIGFPE, &info, task);
+ }
+@@ -1118,7 +1108,7 @@ asmlinkage void __attribute__((weak)) mc
+ }
+
+ /*
+- * 'math_state_restore()' saves the current math information in the
++ * 'math_state_restore()' saves the current math information in the
+ * old math state array, and gets the new ones from the current task
+ *
+ * Careful.. There are problems with IBM-designed IRQ13 behaviour.
+@@ -1145,7 +1135,14 @@ asmlinkage void math_state_restore(void)
+
+ /* clts(); */ /* 'clts' is done for us by Xen during virtual trap. */
+
+- restore_fpu_checking(&me->thread.xstate->fxsave);
++ /*
++ * Paranoid restore. send a SIGSEGV if we fail to restore the state.
++ */
++ if (unlikely(restore_fpu_checking(&me->thread.xstate->fxsave))) {
++ stts();
++ force_sig(SIGSEGV, me);
++ return;
++ }
+ task_thread_info(me)->status |= TS_USEDFPU;
+ me->fpu_counter++;
+ }
+@@ -1190,13 +1187,12 @@ void __init trap_init(void)
+ ret = HYPERVISOR_set_trap_table(trap_table);
+ if (ret)
+ printk("HYPERVISOR_set_trap_table failed: error %d\n", ret);
+-
+ /*
+ * initialize the per thread extended state:
+ */
+- init_thread_xstate();
++ init_thread_xstate();
+ /*
+- * Should be a barrier for any external CPU state.
++ * Should be a barrier for any external CPU state:
+ */
+ cpu_init();
+ }
+@@ -1212,27 +1208,25 @@ void __cpuinit smp_trap_init(trap_info_t
+ }
+ }
+
+-
+ static int __init oops_setup(char *s)
+-{
++{
+ if (!s)
+ return -EINVAL;
+ if (!strcmp(s, "panic"))
+ panic_on_oops = 1;
+ return 0;
+-}
++}
+ early_param("oops", oops_setup);
+
+ static int __init kstack_setup(char *s)
+ {
+ if (!s)
+ return -EINVAL;
+- kstack_depth_to_print = simple_strtoul(s,NULL,0);
++ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+ return 0;
+ }
+ early_param("kstack", kstack_setup);
+
+-
+ static int __init code_bytes_setup(char *s)
+ {
+ code_bytes = simple_strtoul(s, NULL, 0);
+Index: head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/vsyscall_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -42,7 +42,8 @@
+ #include <asm/topology.h>
+ #include <asm/vgtod.h>
+
+-#define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
++#define __vsyscall(nr) \
++ __attribute__ ((unused, __section__(".vsyscall_" #nr))) notrace
+ #define __syscall_clobber "r11","cx","memory"
+
+ /*
+@@ -264,10 +265,7 @@ static void __cpuinit vsyscall_set_cpu(i
+ d |= cpu;
+ d |= (node & 0xf) << 12;
+ d |= (node >> 4) << 48;
+- if (HYPERVISOR_update_descriptor(virt_to_machine(get_cpu_gdt_table(cpu)
+- + GDT_ENTRY_PER_CPU),
+- d))
+- BUG();
++ write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_PER_CPU, &d, DESCTYPE_S);
+ }
+
+ static void __cpuinit cpu_vsyscall_init(void *arg)
+@@ -281,7 +279,7 @@ cpu_vsyscall_notifier(struct notifier_bl
+ {
+ long cpu = (long)arg;
+ if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN)
+- smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 0, 1);
++ smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 1);
+ return NOTIFY_DONE;
+ }
+
+@@ -311,7 +309,7 @@ static int __init vsyscall_init(void)
+ #ifdef CONFIG_SYSCTL
+ register_sysctl_table(kernel_root_table2);
+ #endif
+- on_each_cpu(cpu_vsyscall_init, NULL, 0, 1);
++ on_each_cpu(cpu_vsyscall_init, NULL, 1);
+ hotcpu_notifier(cpu_vsyscall_notifier, 0);
+ return 0;
+ }
+Index: head-2008-12-01/arch/x86/mach-xen/setup.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mach-xen/setup.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/mach-xen/setup.c 2008-12-01 11:49:07.000000000 +0100
+@@ -17,6 +17,8 @@
+ #include <xen/interface/callback.h>
+ #include <xen/interface/memory.h>
+
++#ifdef CONFIG_X86_32
++
+ #ifdef CONFIG_HOTPLUG_CPU
+ #define DEFAULT_SEND_IPI (1)
+ #else
+@@ -44,51 +46,6 @@ static int __init print_ipi_mode(void)
+
+ late_initcall(print_ipi_mode);
+
+-/**
+- * machine_specific_memory_setup - Hook for machine specific memory setup.
+- *
+- * Description:
+- * This is included late in kernel/setup.c so that it can make
+- * use of all of the static functions.
+- **/
+-
+-char * __init machine_specific_memory_setup(void)
+-{
+- int rc;
+- struct xen_memory_map memmap;
+- /*
+- * This is rather large for a stack variable but this early in
+- * the boot process we know we have plenty slack space.
+- */
+- struct e820entry map[E820MAX];
+-
+- memmap.nr_entries = E820MAX;
+- set_xen_guest_handle(memmap.buffer, map);
+-
+- rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
+- if ( rc == -ENOSYS ) {
+- memmap.nr_entries = 1;
+- map[0].addr = 0ULL;
+- map[0].size = PFN_PHYS((unsigned long long)xen_start_info->nr_pages);
+- /* 8MB slack (to balance backend allocations). */
+- map[0].size += 8ULL << 20;
+- map[0].type = E820_RAM;
+- rc = 0;
+- }
+- BUG_ON(rc);
+-
+- sanitize_e820_map(map, (char *)&memmap.nr_entries);
+-
+- BUG_ON(copy_e820_map(map, (char)memmap.nr_entries) < 0);
+-
+- return "Xen";
+-}
+-
+-
+-extern void hypervisor_callback(void);
+-extern void failsafe_callback(void);
+-extern void nmi(void);
+-
+ unsigned long *machine_to_phys_mapping = (void *)MACH2PHYS_VIRT_START;
+ EXPORT_SYMBOL(machine_to_phys_mapping);
+ unsigned int machine_to_phys_order;
+@@ -121,33 +78,66 @@ void __init pre_setup_arch_hook(void)
+ (unsigned long *)xen_start_info->mfn_list;
+ }
+
++#endif /* CONFIG_X86_32 */
++
++extern void hypervisor_callback(void);
++extern void failsafe_callback(void);
++extern void nmi(void);
++
++#ifdef CONFIG_X86_64
++#include <asm/proto.h>
++#define CALLBACK_ADDR(fn) ((unsigned long)(fn))
++#else
++#define CALLBACK_ADDR(fn) { __KERNEL_CS, (unsigned long)(fn) }
++#endif
++
+ void __init machine_specific_arch_setup(void)
+ {
+ int ret;
+ static struct callback_register __initdata event = {
+ .type = CALLBACKTYPE_event,
+- .address = { __KERNEL_CS, (unsigned long)hypervisor_callback },
++ .address = CALLBACK_ADDR(hypervisor_callback)
+ };
+ static struct callback_register __initdata failsafe = {
+ .type = CALLBACKTYPE_failsafe,
+- .address = { __KERNEL_CS, (unsigned long)failsafe_callback },
++ .address = CALLBACK_ADDR(failsafe_callback)
++ };
++#ifdef CONFIG_X86_64
++ static struct callback_register __initdata syscall = {
++ .type = CALLBACKTYPE_syscall,
++ .address = CALLBACK_ADDR(system_call)
+ };
++#endif
++#if defined(CONFIG_X86_LOCAL_APIC) || defined(CONFIG_X86_32)
+ static struct callback_register __initdata nmi_cb = {
+ .type = CALLBACKTYPE_nmi,
+- .address = { __KERNEL_CS, (unsigned long)nmi },
++ .address = CALLBACK_ADDR(nmi)
+ };
++#endif
+
+ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &event);
+ if (ret == 0)
+ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &failsafe);
++#ifdef CONFIG_X86_64
++ if (ret == 0)
++ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &syscall);
++#endif
+ #if CONFIG_XEN_COMPAT <= 0x030002
++#ifdef CONFIG_X86_32
+ if (ret == -ENOSYS)
+ ret = HYPERVISOR_set_callbacks(
+ event.address.cs, event.address.eip,
+ failsafe.address.cs, failsafe.address.eip);
++#else
++ ret = HYPERVISOR_set_callbacks(
++ event.address,
++ failsafe.address,
++ syscall.address);
++#endif
+ #endif
+ BUG_ON(ret);
+
++#if defined(CONFIG_X86_LOCAL_APIC) || defined(CONFIG_X86_32)
+ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &nmi_cb);
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ if (ret == -ENOSYS) {
+@@ -158,15 +148,43 @@ void __init machine_specific_arch_setup(
+ HYPERVISOR_nmi_op(XENNMI_register_callback, &cb);
+ }
+ #endif
++#endif
+
++#ifdef CONFIG_X86_32
+ /* Do an early initialization of the fixmap area */
+ {
+ extern pte_t swapper_pg_fixmap[PTRS_PER_PTE];
+ unsigned long addr = __fix_to_virt(FIX_EARLYCON_MEM_BASE);
+ pud_t *pud = pud_offset(swapper_pg_dir + pgd_index(addr), addr);
+ pmd_t *pmd = pmd_offset(pud, addr);
++ unsigned int i;
+
+ make_lowmem_page_readonly(swapper_pg_fixmap, XENFEAT_writable_page_tables);
+ set_pmd(pmd, __pmd(__pa_symbol(swapper_pg_fixmap) | _PAGE_TABLE));
++
++#define __FIXADDR_TOP (-PAGE_SIZE)
++#define FIX_BUG_ON(fix) BUILD_BUG_ON(pmd_index(__fix_to_virt(FIX_##fix)) \
++ != pmd_index(__fix_to_virt(FIX_EARLYCON_MEM_BASE)))
++ FIX_BUG_ON(SHARED_INFO);
++ FIX_BUG_ON(ISAMAP_BEGIN);
++ FIX_BUG_ON(ISAMAP_END);
++#undef __FIXADDR_TOP
++ BUG_ON(pte_index(hypervisor_virt_start));
++
++ /* Switch to the real shared_info page, and clear the
++ * dummy page. */
++ set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info);
++ HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
++ memset(empty_zero_page, 0, sizeof(empty_zero_page));
++
++ /* Setup mapping of lower 1st MB */
++ for (i = 0; i < NR_FIX_ISAMAPS; i++)
++ if (is_initial_xendomain())
++ set_fixmap(FIX_ISAMAP_BEGIN - i, i * PAGE_SIZE);
++ else
++ __set_fixmap(FIX_ISAMAP_BEGIN - i,
++ virt_to_machine(empty_zero_page),
++ PAGE_KERNEL_RO);
+ }
++#endif
+ }
+Index: head-2008-12-01/arch/x86/mm/fault-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/fault-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/fault-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -10,6 +10,7 @@
+ #include <linux/string.h>
+ #include <linux/types.h>
+ #include <linux/ptrace.h>
++#include <linux/mmiotrace.h>
+ #include <linux/mman.h>
+ #include <linux/mm.h>
+ #include <linux/smp.h>
+@@ -49,17 +50,23 @@
+ #define PF_RSVD (1<<3)
+ #define PF_INSTR (1<<4)
+
++static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
++{
++#ifdef CONFIG_MMIOTRACE_HOOKS
++ if (unlikely(is_kmmio_active()))
++ if (kmmio_handler(regs, addr) == 1)
++ return -1;
++#endif
++ return 0;
++}
++
+ static inline int notify_page_fault(struct pt_regs *regs)
+ {
+ #ifdef CONFIG_KPROBES
+ int ret = 0;
+
+ /* kprobe_running() needs smp_processor_id() */
+-#ifdef CONFIG_X86_32
+ if (!user_mode_vm(regs)) {
+-#else
+- if (!user_mode(regs)) {
+-#endif
+ preempt_disable();
+ if (kprobe_running() && kprobe_fault_handler(regs, 14))
+ ret = 1;
+@@ -409,11 +416,7 @@ static void show_fault_oops(struct pt_re
+ printk(KERN_CONT "NULL pointer dereference");
+ else
+ printk(KERN_CONT "paging request");
+-#ifdef CONFIG_X86_32
+- printk(KERN_CONT " at %08lx\n", address);
+-#else
+- printk(KERN_CONT " at %016lx\n", address);
+-#endif
++ printk(KERN_CONT " at %p\n", (void *) address);
+ printk(KERN_ALERT "IP:");
+ printk_address(regs->ip, 1);
+ dump_pagetable(address);
+@@ -628,6 +631,8 @@ void __kprobes do_page_fault(struct pt_r
+
+ if (notify_page_fault(regs))
+ return;
++ if (unlikely(kmmio_fault(regs, address)))
++ return;
+
+ /*
+ * We fault-in kernel-space virtual memory on-demand. The
+@@ -832,14 +837,10 @@ bad_area_nosemaphore:
+ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+ printk_ratelimit()) {
+ printk(
+-#ifdef CONFIG_X86_32
+- "%s%s[%d]: segfault at %lx ip %08lx sp %08lx error %lx",
+-#else
+- "%s%s[%d]: segfault at %lx ip %lx sp %lx error %lx",
+-#endif
++ "%s%s[%d]: segfault at %lx ip %p sp %p error %lx",
+ task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
+- tsk->comm, task_pid_nr(tsk), address, regs->ip,
+- regs->sp, error_code);
++ tsk->comm, task_pid_nr(tsk), address,
++ (void *) regs->ip, (void *) regs->sp, error_code);
+ print_vma_addr(" in ", regs->ip);
+ printk("\n");
+ }
+@@ -947,81 +948,45 @@ LIST_HEAD(pgd_list);
+ void vmalloc_sync_all(void)
+ {
+ #ifdef CONFIG_X86_32
+- /*
+- * Note that races in the updates of insync and start aren't
+- * problematic: insync can only get set bits added, and updates to
+- * start are only improving performance (without affecting correctness
+- * if undone).
+- * XEN: To work on PAE, we need to iterate over PMDs rather than PGDs.
+- * This change works just fine with 2-level paging too.
+- */
+-#define sync_index(a) ((a) >> PMD_SHIFT)
+- static DECLARE_BITMAP(insync, PTRS_PER_PGD*PTRS_PER_PMD);
+- static unsigned long start = TASK_SIZE;
+- unsigned long address;
++ unsigned long address = VMALLOC_START & PGDIR_MASK;
+
+ if (SHARED_KERNEL_PMD)
+ return;
+
+ BUILD_BUG_ON(TASK_SIZE & ~PMD_MASK);
+- for (address = start;
+- address < hypervisor_virt_start;
+- address += PMD_SIZE) {
+- if (!test_bit(sync_index(address), insync)) {
+- unsigned long flags;
+- struct page *page;
+-
+- spin_lock_irqsave(&pgd_lock, flags);
+- /* XEN: failure path assumes non-empty pgd_list. */
+- if (unlikely(list_empty(&pgd_list))) {
+- spin_unlock_irqrestore(&pgd_lock, flags);
+- return;
+- }
+- list_for_each_entry(page, &pgd_list, lru) {
+- if (!vmalloc_sync_one(page_address(page),
+- address))
+- break;
+- }
+- spin_unlock_irqrestore(&pgd_lock, flags);
+- if (!page)
+- set_bit(sync_index(address), insync);
++ for (; address < hypervisor_virt_start; address += PMD_SIZE) {
++ unsigned long flags;
++ struct page *page;
++
++ spin_lock_irqsave(&pgd_lock, flags);
++ list_for_each_entry(page, &pgd_list, lru) {
++ if (!vmalloc_sync_one(page_address(page),
++ address))
++ break;
+ }
+- if (address == start && test_bit(sync_index(address), insync))
+- start = address + PMD_SIZE;
++ spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+ #else /* CONFIG_X86_64 */
+- /*
+- * Note that races in the updates of insync and start aren't
+- * problematic: insync can only get set bits added, and updates to
+- * start are only improving performance (without affecting correctness
+- * if undone).
+- */
+- static DECLARE_BITMAP(insync, PTRS_PER_PGD);
+- static unsigned long start = VMALLOC_START & PGDIR_MASK;
++ unsigned long start = VMALLOC_START & PGDIR_MASK;
+ unsigned long address;
+
+ for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
+- if (!test_bit(pgd_index(address), insync)) {
+- const pgd_t *pgd_ref = pgd_offset_k(address);
+- unsigned long flags;
+- struct page *page;
+-
+- if (pgd_none(*pgd_ref))
+- continue;
+- spin_lock_irqsave(&pgd_lock, flags);
+- list_for_each_entry(page, &pgd_list, lru) {
+- pgd_t *pgd;
+- pgd = (pgd_t *)page_address(page) + pgd_index(address);
+- if (pgd_none(*pgd))
+- set_pgd(pgd, *pgd_ref);
+- else
+- BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+- }
+- spin_unlock_irqrestore(&pgd_lock, flags);
+- set_bit(pgd_index(address), insync);
++ const pgd_t *pgd_ref = pgd_offset_k(address);
++ unsigned long flags;
++ struct page *page;
++
++ if (pgd_none(*pgd_ref))
++ continue;
++ spin_lock_irqsave(&pgd_lock, flags);
++ list_for_each_entry(page, &pgd_list, lru) {
++ pgd_t *pgd;
++ pgd = (pgd_t *)page_address(page) + pgd_index(address);
++ if (pgd_none(*pgd))
++ set_pgd(pgd, *pgd_ref);
++ else
++ BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+ }
+- if (address == start)
+- start = address + PGDIR_SIZE;
++ spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+ #endif
+ }
+Index: head-2008-12-01/arch/x86/mm/hypervisor.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/hypervisor.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/hypervisor.c 2008-12-01 11:49:07.000000000 +0100
+@@ -837,42 +837,9 @@ int write_ldt_entry(struct desc_struct *
+ return HYPERVISOR_update_descriptor(mach_lp, *(const u64*)desc);
+ }
+
+-#define MAX_BATCHED_FULL_PTES 32
+-
+-int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
+- unsigned long addr, unsigned long end, pgprot_t newprot,
+- int dirty_accountable)
++int write_gdt_entry(struct desc_struct *gdt, int entry, const void *desc,
++ int type)
+ {
+- int rc = 0, i = 0;
+- mmu_update_t u[MAX_BATCHED_FULL_PTES];
+- pte_t *pte;
+- spinlock_t *ptl;
+-
+- if (!xen_feature(XENFEAT_mmu_pt_update_preserve_ad))
+- return 0;
+-
+- pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
+- do {
+- if (pte_present(*pte)) {
+- pte_t ptent = pte_modify(*pte, newprot);
+-
+- if (dirty_accountable && pte_dirty(ptent))
+- ptent = pte_mkwrite(ptent);
+- u[i].ptr = (__pmd_val(*pmd) & PHYSICAL_PAGE_MASK)
+- | ((unsigned long)pte & ~PAGE_MASK)
+- | MMU_PT_UPDATE_PRESERVE_AD;
+- u[i].val = __pte_val(ptent);
+- if (++i == MAX_BATCHED_FULL_PTES) {
+- if ((rc = HYPERVISOR_mmu_update(
+- &u[0], i, NULL, DOMID_SELF)) != 0)
+- break;
+- i = 0;
+- }
+- }
+- } while (pte++, addr += PAGE_SIZE, addr != end);
+- if (i)
+- rc = HYPERVISOR_mmu_update( &u[0], i, NULL, DOMID_SELF);
+- pte_unmap_unlock(pte - 1, ptl);
+- BUG_ON(rc && rc != -ENOSYS);
+- return !rc;
++ maddr_t mach_gp = virt_to_machine(gdt + entry);
++ return HYPERVISOR_update_descriptor(mach_gp, *(const u64*)desc);
+ }
+Index: head-2008-12-01/arch/x86/mm/init_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_32-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -54,6 +54,7 @@
+
+ unsigned int __VMALLOC_RESERVE = 128 << 20;
+
++unsigned long max_low_pfn_mapped;
+ unsigned long max_pfn_mapped;
+
+ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+@@ -61,6 +62,27 @@ unsigned long highstart_pfn, highend_pfn
+
+ static noinline int do_test_wp_bit(void);
+
++
++static unsigned long __initdata table_start;
++static unsigned long __initdata table_end;
++static unsigned long __initdata table_top;
++
++static int __initdata after_init_bootmem;
++
++static __init void *alloc_low_page(unsigned long *phys)
++{
++ unsigned long pfn = table_end++;
++ void *adr;
++
++ if (pfn >= table_top)
++ panic("alloc_low_page: ran out of memory");
++
++ adr = __va(pfn * PAGE_SIZE);
++ memset(adr, 0, PAGE_SIZE);
++ *phys = pfn * PAGE_SIZE;
++ return adr;
++}
++
+ /*
+ * Creates a middle page table and puts a pointer to it in the
+ * given global directory entry. This only returns the gd entry
+@@ -72,9 +94,12 @@ static pmd_t * __init one_md_table_init(
+ pmd_t *pmd_table;
+
+ #ifdef CONFIG_X86_PAE
++ unsigned long phys;
+ if (!(__pgd_val(*pgd) & _PAGE_PRESENT)) {
+- pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+-
++ if (after_init_bootmem)
++ pmd_table = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
++ else
++ pmd_table = (pmd_t *)alloc_low_page(&phys);
+ paravirt_alloc_pmd(&init_mm, __pa(pmd_table) >> PAGE_SHIFT);
+ make_lowmem_page_readonly(pmd_table, XENFEAT_writable_page_tables);
+ set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
+@@ -101,12 +126,16 @@ static pte_t * __init one_page_table_ini
+ #endif
+ pte_t *page_table = NULL;
+
++ if (after_init_bootmem) {
+ #ifdef CONFIG_DEBUG_PAGEALLOC
+- page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
++ page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
+ #endif
+- if (!page_table) {
+- page_table =
++ if (!page_table)
++ page_table =
+ (pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
++ } else {
++ unsigned long phys;
++ page_table = (pte_t *)alloc_low_page(&phys);
+ }
+
+ paravirt_alloc_pte(&init_mm, __pa(page_table) >> PAGE_SHIFT);
+@@ -167,24 +196,24 @@ static inline int is_kernel_text(unsigne
+ * of max_low_pfn pages, by creating page tables starting from address
+ * PAGE_OFFSET:
+ */
+-static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
++static void __init kernel_physical_mapping_init(pgd_t *pgd_base,
++ unsigned long start_pfn,
++ unsigned long end_pfn,
++ int use_pse)
+ {
+ int pgd_idx, pmd_idx, pte_ofs;
+ unsigned long pfn;
+ pgd_t *pgd;
+ pmd_t *pmd;
+ pte_t *pte;
++ unsigned pages_2m = 0, pages_4k = 0;
+
+- unsigned long max_ram_pfn = xen_start_info->nr_pages;
+- if (max_ram_pfn > max_low_pfn)
+- max_ram_pfn = max_low_pfn;
++ if (!cpu_has_pse)
++ use_pse = 0;
+
+- pgd_idx = pgd_index(PAGE_OFFSET);
++ pfn = start_pfn;
++ pgd_idx = pgd_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
+ pgd = pgd_base + pgd_idx;
+- pfn = 0;
+- pmd_idx = pmd_index(PAGE_OFFSET);
+- pte_ofs = pte_index(PAGE_OFFSET);
+-
+ for (; pgd_idx < PTRS_PER_PGD; pgd++, pgd_idx++) {
+ #ifdef CONFIG_XEN
+ /*
+@@ -198,10 +227,16 @@ static void __init kernel_physical_mappi
+ #else
+ pmd = one_md_table_init(pgd);
+ #endif
+- if (pfn >= max_low_pfn)
++
++ if (pfn >= end_pfn)
+ continue;
++#ifdef CONFIG_X86_PAE
++ pmd_idx = pmd_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
+ pmd += pmd_idx;
+- for (; pmd_idx < PTRS_PER_PMD && pfn < max_low_pfn;
++#else
++ pmd_idx = 0;
++#endif
++ for (; pmd_idx < PTRS_PER_PMD && pfn < end_pfn;
+ pmd++, pmd_idx++) {
+ unsigned int addr = pfn * PAGE_SIZE + PAGE_OFFSET;
+
+@@ -211,13 +246,8 @@ static void __init kernel_physical_mappi
+ /*
+ * Map with big pages if possible, otherwise
+ * create normal page tables:
+- *
+- * Don't use a large page for the first 2/4MB of memory
+- * because there are often fixed size MTRRs in there
+- * and overlapping MTRRs into large pages can cause
+- * slowdowns.
+ */
+- if (cpu_has_pse && !(pgd_idx == 0 && pmd_idx == 0)) {
++ if (use_pse) {
+ unsigned int addr2;
+ pgprot_t prot = PAGE_KERNEL_LARGE;
+
+@@ -228,49 +258,35 @@ static void __init kernel_physical_mappi
+ is_kernel_text(addr2))
+ prot = PAGE_KERNEL_LARGE_EXEC;
+
++ pages_2m++;
+ set_pmd(pmd, pfn_pmd(pfn, prot));
+
+ pfn += PTRS_PER_PTE;
+- max_pfn_mapped = pfn;
+ continue;
+ }
+ pte = one_page_table_init(pmd);
+
+- for (pte += pte_ofs;
+- pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn;
++ pte_ofs = pte_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
++ pte += pte_ofs;
++ for (; pte_ofs < PTRS_PER_PTE && pfn < end_pfn;
+ pte++, pfn++, pte_ofs++, addr += PAGE_SIZE) {
+ pgprot_t prot = PAGE_KERNEL;
+
+ /* XEN: Only map initial RAM allocation. */
+- if ((pfn >= max_ram_pfn) || pte_present(*pte))
++ if (pfn >= xen_start_info->nr_pages || pte_present(*pte))
+ continue;
+ if (is_kernel_text(addr))
+ prot = PAGE_KERNEL_EXEC;
+
++ pages_4k++;
+ set_pte(pte, pfn_pte(pfn, prot));
+ }
+- max_pfn_mapped = pfn;
+- pte_ofs = 0;
+ }
+- pmd_idx = 0;
+ }
++ update_page_count(PG_LEVEL_2M, pages_2m);
++ update_page_count(PG_LEVEL_4K, pages_4k);
+ }
+
+-#ifndef CONFIG_XEN
+-
+-static inline int page_kills_ppro(unsigned long pagenr)
+-{
+- if (pagenr >= 0x70000 && pagenr <= 0x7003F)
+- return 1;
+- return 0;
+-}
+-
+-#else
+-
+-#define page_kills_ppro(p) 0
+-
+-#endif
+-
+ /*
+ * devmem_is_allowed() checks to see if /dev/mem access to a certain address
+ * is valid. The argument is a physical page number.
+@@ -331,30 +347,63 @@ static void __init permanent_kmaps_init(
+ pkmap_page_table = pte;
+ }
+
+-void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
++static void __init add_one_highpage_init(struct page *page, int pfn)
+ {
+- if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn))) {
+- ClearPageReserved(page);
+- init_page_count(page);
+- if (pfn < xen_start_info->nr_pages)
+- __free_page(page);
+- totalhigh_pages++;
+- } else
+- SetPageReserved(page);
++ ClearPageReserved(page);
++ init_page_count(page);
++ if (pfn < xen_start_info->nr_pages)
++ __free_page(page);
++ totalhigh_pages++;
++}
++
++struct add_highpages_data {
++ unsigned long start_pfn;
++ unsigned long end_pfn;
++};
++
++static int __init add_highpages_work_fn(unsigned long start_pfn,
++ unsigned long end_pfn, void *datax)
++{
++ int node_pfn;
++ struct page *page;
++ unsigned long final_start_pfn, final_end_pfn;
++ struct add_highpages_data *data;
++
++ data = (struct add_highpages_data *)datax;
++
++ final_start_pfn = max(start_pfn, data->start_pfn);
++ final_end_pfn = min(end_pfn, data->end_pfn);
++ if (final_start_pfn >= final_end_pfn)
++ return 0;
++
++ for (node_pfn = final_start_pfn; node_pfn < final_end_pfn;
++ node_pfn++) {
++ if (!pfn_valid(node_pfn))
++ continue;
++ page = pfn_to_page(node_pfn);
++ add_one_highpage_init(page, node_pfn);
++ }
++
++ return 0;
++
++}
++
++void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,
++ unsigned long end_pfn)
++{
++ struct add_highpages_data data;
++
++ data.start_pfn = start_pfn;
++ data.end_pfn = end_pfn;
++
++ work_with_active_regions(nid, add_highpages_work_fn, &data);
+ }
+
+ #ifndef CONFIG_NUMA
+-static void __init set_highmem_pages_init(int bad_ppro)
++static void __init set_highmem_pages_init(void)
+ {
+- int pfn;
++ add_highpages_with_active_regions(0, highstart_pfn, highend_pfn);
+
+- for (pfn = highstart_pfn; pfn < highend_pfn; pfn++) {
+- /*
+- * Holes under sparsemem might not have no mem_map[]:
+- */
+- if (pfn_valid(pfn))
+- add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
+- }
+ totalram_pages += totalhigh_pages;
+ }
+ #endif /* !CONFIG_NUMA */
+@@ -362,24 +411,11 @@ static void __init set_highmem_pages_ini
+ #else
+ # define kmap_init() do { } while (0)
+ # define permanent_kmaps_init(pgd_base) do { } while (0)
+-# define set_highmem_pages_init(bad_ppro) do { } while (0)
++# define set_highmem_pages_init() do { } while (0)
+ #endif /* CONFIG_HIGHMEM */
+
+-pteval_t __PAGE_KERNEL = _PAGE_KERNEL;
+-EXPORT_SYMBOL(__PAGE_KERNEL);
+-
+-pteval_t __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC;
+-
+ pgd_t *swapper_pg_dir;
+
+-static void __init xen_pagetable_setup_start(pgd_t *base)
+-{
+-}
+-
+-static void __init xen_pagetable_setup_done(pgd_t *base)
+-{
+-}
+-
+ /*
+ * Build a proper pagetable for the kernel mappings. Up until this
+ * point, we've been running on some set of pagetables constructed by
+@@ -399,27 +435,10 @@ static void __init xen_pagetable_setup_d
+ * be partially populated, and so it avoids stomping on any existing
+ * mappings.
+ */
+-static void __init pagetable_init(void)
++static void __init early_ioremap_page_table_range_init(pgd_t *pgd_base)
+ {
+- pgd_t *pgd_base = (pgd_t *)xen_start_info->pt_base;
+ unsigned long vaddr, end;
+
+- xen_pagetable_setup_start(pgd_base);
+-
+- /* Enable PSE if available */
+- if (cpu_has_pse)
+- set_in_cr4(X86_CR4_PSE);
+-
+- /* Enable PGE if available */
+- if (cpu_has_pge) {
+- set_in_cr4(X86_CR4_PGE);
+- __PAGE_KERNEL |= _PAGE_GLOBAL;
+- __PAGE_KERNEL_EXEC |= _PAGE_GLOBAL;
+- }
+-
+- kernel_physical_mapping_init(pgd_base);
+- remap_numa_kva();
+-
+ /*
+ * Fixed mappings, only the page table structure has to be
+ * created - mappings will be set by set_fixmap():
+@@ -429,10 +448,13 @@ static void __init pagetable_init(void)
+ end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
+ page_table_range_init(vaddr, end, pgd_base);
+ early_ioremap_reset();
++}
+
+- permanent_kmaps_init(pgd_base);
++static void __init pagetable_init(void)
++{
++ pgd_t *pgd_base = (pgd_t *)xen_start_info->pt_base;
+
+- xen_pagetable_setup_done(pgd_base);
++ permanent_kmaps_init(pgd_base);
+ }
+
+ #if defined(CONFIG_ACPI_SLEEP) && !defined(CONFIG_XEN)
+@@ -475,7 +497,7 @@ void zap_low_mappings(void)
+
+ int nx_enabled;
+
+-pteval_t __supported_pte_mask __read_mostly = ~_PAGE_NX;
++pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL);
+ EXPORT_SYMBOL_GPL(__supported_pte_mask);
+
+ #ifdef CONFIG_X86_PAE
+@@ -528,42 +550,369 @@ static void __init set_nx(void)
+ }
+ #endif
+
++/* user-defined highmem size */
++static unsigned int highmem_pages = -1;
++
+ /*
+- * paging_init() sets up the page tables - note that the first 8MB are
+- * already mapped by head.S.
+- *
+- * This routines also unmaps the page at virtual kernel address 0, so
+- * that we can trap those pesky NULL-reference errors in the kernel.
++ * highmem=size forces highmem to be exactly 'size' bytes.
++ * This works even on boxes that have no highmem otherwise.
++ * This also works to reduce highmem size on bigger boxes.
+ */
+-void __init paging_init(void)
++static int __init parse_highmem(char *arg)
++{
++ if (!arg)
++ return -EINVAL;
++
++ highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
++ return 0;
++}
++early_param("highmem", parse_highmem);
++
++/*
++ * Determine low and high memory ranges:
++ */
++void __init find_low_pfn_range(void)
++{
++ /* it could update max_pfn */
++
++ /* max_low_pfn is 0, we already have early_res support */
++
++ max_low_pfn = max_pfn;
++ if (max_low_pfn > MAXMEM_PFN) {
++ if (highmem_pages == -1)
++ highmem_pages = max_pfn - MAXMEM_PFN;
++ if (highmem_pages + MAXMEM_PFN < max_pfn)
++ max_pfn = MAXMEM_PFN + highmem_pages;
++ if (highmem_pages + MAXMEM_PFN > max_pfn) {
++ printk(KERN_WARNING "only %luMB highmem pages "
++ "available, ignoring highmem size of %uMB.\n",
++ pages_to_mb(max_pfn - MAXMEM_PFN),
++ pages_to_mb(highmem_pages));
++ highmem_pages = 0;
++ }
++ max_low_pfn = MAXMEM_PFN;
++#ifndef CONFIG_HIGHMEM
++ /* Maximum memory usable is what is directly addressable */
++ printk(KERN_WARNING "Warning only %ldMB will be used.\n",
++ MAXMEM>>20);
++ if (max_pfn > MAX_NONPAE_PFN)
++ printk(KERN_WARNING
++ "Use a HIGHMEM64G enabled kernel.\n");
++ else
++ printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
++ max_pfn = MAXMEM_PFN;
++#else /* !CONFIG_HIGHMEM */
++#ifndef CONFIG_HIGHMEM64G
++ if (max_pfn > MAX_NONPAE_PFN) {
++ max_pfn = MAX_NONPAE_PFN;
++ printk(KERN_WARNING "Warning only 4GB will be used."
++ "Use a HIGHMEM64G enabled kernel.\n");
++ }
++#endif /* !CONFIG_HIGHMEM64G */
++#endif /* !CONFIG_HIGHMEM */
++ } else {
++ if (highmem_pages == -1)
++ highmem_pages = 0;
++#ifdef CONFIG_HIGHMEM
++ if (highmem_pages >= max_pfn) {
++ printk(KERN_ERR "highmem size specified (%uMB) is "
++ "bigger than pages available (%luMB)!.\n",
++ pages_to_mb(highmem_pages),
++ pages_to_mb(max_pfn));
++ highmem_pages = 0;
++ }
++ if (highmem_pages) {
++ if (max_low_pfn - highmem_pages <
++ 64*1024*1024/PAGE_SIZE){
++ printk(KERN_ERR "highmem size %uMB results in "
++ "smaller than 64MB lowmem, ignoring it.\n"
++ , pages_to_mb(highmem_pages));
++ highmem_pages = 0;
++ }
++ max_low_pfn -= highmem_pages;
++ }
++#else
++ if (highmem_pages)
++ printk(KERN_ERR "ignoring highmem size on non-highmem"
++ " kernel!\n");
++#endif
++ }
++}
++
++#ifndef CONFIG_NEED_MULTIPLE_NODES
++void __init initmem_init(unsigned long start_pfn,
++ unsigned long end_pfn)
++{
++#ifdef CONFIG_HIGHMEM
++ highstart_pfn = highend_pfn = max_pfn;
++ if (max_pfn > max_low_pfn)
++ highstart_pfn = max_low_pfn;
++ memory_present(0, 0, highend_pfn);
++ e820_register_active_regions(0, 0, highend_pfn);
++ printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
++ pages_to_mb(highend_pfn - highstart_pfn));
++ num_physpages = highend_pfn;
++ high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
++#else
++ memory_present(0, 0, max_low_pfn);
++ e820_register_active_regions(0, 0, max_low_pfn);
++ num_physpages = max_low_pfn;
++ high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
++#endif
++#ifdef CONFIG_FLATMEM
++ max_mapnr = num_physpages;
++#endif
++ printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
++ pages_to_mb(max_low_pfn));
++
++ setup_bootmem_allocator();
++}
++#endif /* !CONFIG_NEED_MULTIPLE_NODES */
++
++static void __init zone_sizes_init(void)
++{
++ unsigned long max_zone_pfns[MAX_NR_ZONES];
++ memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
++ max_zone_pfns[ZONE_DMA] =
++ virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
++ max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
++#ifdef CONFIG_HIGHMEM
++ max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
++#endif
++
++ free_area_init_nodes(max_zone_pfns);
++}
++
++void __init setup_bootmem_allocator(void)
+ {
+ int i;
++ unsigned long bootmap_size, bootmap;
++ unsigned long end_pfn = min(max_low_pfn, xen_start_info->nr_pages);
++
++ /*
++ * Initialize the boot-time allocator (with low memory only):
++ */
++ bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
++ bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
++ max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
++ PAGE_SIZE);
++ if (bootmap == -1L)
++ panic("Cannot find bootmem map of size %ld\n", bootmap_size);
++ reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
++
++ /* don't touch min_low_pfn */
++ bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
++ min_low_pfn, end_pfn);
++ printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
++ max_pfn_mapped<<PAGE_SHIFT);
++ printk(KERN_INFO " low ram: %08lx - %08lx\n",
++ min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
++ printk(KERN_INFO " bootmap %08lx - %08lx\n",
++ bootmap, bootmap + bootmap_size);
++ for_each_online_node(i)
++ free_bootmem_with_active_regions(i, end_pfn);
++ early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
++
++ after_init_bootmem = 1;
++}
++
++static unsigned long __init extend_init_mapping(unsigned long tables_space)
++{
++ unsigned long start_pfn = (__pa(xen_start_info->pt_base) >> PAGE_SHIFT)
++ + xen_start_info->nr_pt_frames;
++ unsigned long start = start_pfn, va;
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++
++ /* Kill mapping of low 1MB. */
++ for (va = PAGE_OFFSET; va < (unsigned long)&_text; va += PAGE_SIZE)
++ if (HYPERVISOR_update_va_mapping(va, __pte_ma(0), 0))
++ BUG();
++
++ /* Ensure init mappings cover kernel text/data and initial tables. */
++ while (va < PAGE_OFFSET + (start_pfn << PAGE_SHIFT) + tables_space) {
++ pgd = pgd_offset_k(va);
++ pud = pud_offset(pgd, va);
++ pmd = pmd_offset(pud, va);
++ if (pmd_none(*pmd)) {
++ unsigned long pa = start_pfn++ << PAGE_SHIFT;
++
++ memset(__va(pa), 0, PAGE_SIZE);
++ make_lowmem_page_readonly(__va(pa),
++ XENFEAT_writable_page_tables);
++ xen_l2_entry_update(pmd, __pmd(pa | _KERNPG_TABLE));
++ }
++ pte = pte_offset_kernel(pmd, va);
++ if (pte_none(*pte)) {
++ pte_t new_pte = __pte(__pa(va) | _KERNPG_TABLE);
++
++ if (HYPERVISOR_update_va_mapping(va, new_pte, 0))
++ BUG();
++ }
++ va += PAGE_SIZE;
++ }
++
++ /* Finally, blow away any spurious initial mappings. */
++ while (1) {
++ pgd = pgd_offset_k(va);
++ pud = pud_offset(pgd, va);
++ pmd = pmd_offset(pud, va);
++ if (pmd_none(*pmd))
++ break;
++ if (HYPERVISOR_update_va_mapping(va, __pte_ma(0), 0))
++ BUG();
++ va += PAGE_SIZE;
++ }
++
++ if (start_pfn > start)
++ reserve_early(start << PAGE_SHIFT,
++ start_pfn << PAGE_SHIFT, "INITMAP");
++
++ return start_pfn;
++}
++
++static void __init find_early_table_space(unsigned long end)
++{
++ unsigned long puds, pmds, ptes, tables;
++
++ puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
++ tables = PAGE_ALIGN(puds * sizeof(pud_t));
++
++ pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
++ tables += PAGE_ALIGN(pmds * sizeof(pmd_t));
++
++ if (cpu_has_pse) {
++ unsigned long extra;
++
++ extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
++ extra += PMD_SIZE;
++ ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
++ } else
++ ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
++
++ tables += PAGE_ALIGN(ptes * sizeof(pte_t));
++
++ /* for fixmap */
++ tables += PAGE_SIZE
++ * ((((FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK)
++ - (__fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK))
++ >> PMD_SHIFT);
++
++ table_start = extend_init_mapping(tables);
++
++ table_end = table_start;
++ table_top = table_start + (tables>>PAGE_SHIFT);
++
++ printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
++ end, table_start << PAGE_SHIFT,
++ (table_start << PAGE_SHIFT) + tables);
++}
++
++unsigned long __init_refok init_memory_mapping(unsigned long start,
++ unsigned long end)
++{
++ pgd_t *pgd_base = swapper_pg_dir;
++ unsigned long start_pfn, end_pfn;
++ unsigned long big_page_start;
++
++ /*
++ * Find space for the kernel direct mapping tables.
++ */
++ if (!after_init_bootmem)
++ find_early_table_space(end);
+
+ #ifdef CONFIG_X86_PAE
+ set_nx();
+ if (nx_enabled)
+ printk(KERN_INFO "NX (Execute Disable) protection: active\n");
+ #endif
++
++ /* Enable PSE if available */
++ if (cpu_has_pse)
++ set_in_cr4(X86_CR4_PSE);
++
++ /* Enable PGE if available */
++ if (cpu_has_pge) {
++ set_in_cr4(X86_CR4_PGE);
++ __supported_pte_mask |= _PAGE_GLOBAL;
++ }
++
++ /*
++ * Don't use a large page for the first 2/4MB of memory
++ * because there are often fixed size MTRRs in there
++ * and overlapping MTRRs into large pages can cause
++ * slowdowns.
++ */
++ big_page_start = PMD_SIZE;
++
++ if (start < big_page_start) {
++ start_pfn = start >> PAGE_SHIFT;
++ end_pfn = min(big_page_start>>PAGE_SHIFT, end>>PAGE_SHIFT);
++ } else {
++ /* head is not big page alignment ? */
++ start_pfn = start >> PAGE_SHIFT;
++ end_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
++ << (PMD_SHIFT - PAGE_SHIFT);
++ }
++ if (start_pfn < end_pfn)
++ kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn, 0);
++
++ /* big page range */
++ start_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
++ << (PMD_SHIFT - PAGE_SHIFT);
++ if (start_pfn < (big_page_start >> PAGE_SHIFT))
++ start_pfn = big_page_start >> PAGE_SHIFT;
++ end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
++ if (start_pfn < end_pfn)
++ kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn,
++ cpu_has_pse);
++
++ /* tail is not big page alignment ? */
++ start_pfn = end_pfn;
++ if (start_pfn > (big_page_start>>PAGE_SHIFT)) {
++ end_pfn = end >> PAGE_SHIFT;
++ if (start_pfn < end_pfn)
++ kernel_physical_mapping_init(pgd_base, start_pfn,
++ end_pfn, 0);
++ }
++
++ early_ioremap_page_table_range_init(pgd_base);
++
++ __flush_tlb_all();
++
++ if (!after_init_bootmem)
++ reserve_early(table_start << PAGE_SHIFT,
++ table_end << PAGE_SHIFT, "PGTABLE");
++
++ if (!after_init_bootmem)
++ early_memtest(start, end);
++
++ return end >> PAGE_SHIFT;
++}
++
++
++/*
++ * paging_init() sets up the page tables - note that the first 8MB are
++ * already mapped by head.S.
++ *
++ * This routines also unmaps the page at virtual kernel address 0, so
++ * that we can trap those pesky NULL-reference errors in the kernel.
++ */
++void __init paging_init(void)
++{
+ pagetable_init();
+
+ __flush_tlb_all();
+
+ kmap_init();
+
+- /* Switch to the real shared_info page, and clear the
+- * dummy page. */
+- set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info);
+- HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO);
+- memset(empty_zero_page, 0, sizeof(empty_zero_page));
+-
+- /* Setup mapping of lower 1st MB */
+- for (i = 0; i < NR_FIX_ISAMAPS; i++)
+- if (is_initial_xendomain())
+- set_fixmap(FIX_ISAMAP_BEGIN - i, i * PAGE_SIZE);
+- else
+- __set_fixmap(FIX_ISAMAP_BEGIN - i,
+- virt_to_machine(empty_zero_page),
+- PAGE_KERNEL_RO);
++ /*
++ * NOTE: at this point the bootmem allocator is fully available.
++ */
++ sparse_init();
++ zone_sizes_init();
+ }
+
+ /*
+@@ -598,7 +947,7 @@ static struct kcore_list kcore_mem, kcor
+ void __init mem_init(void)
+ {
+ int codesize, reservedpages, datasize, initsize;
+- int tmp, bad_ppro;
++ int tmp;
+ unsigned long pfn;
+
+ pci_iommu_alloc();
+@@ -606,19 +955,6 @@ void __init mem_init(void)
+ #ifdef CONFIG_FLATMEM
+ BUG_ON(!mem_map);
+ #endif
+- bad_ppro = ppro_with_ram_bug();
+-
+-#ifdef CONFIG_HIGHMEM
+- /* check that fixmap and pkmap do not overlap */
+- if (PKMAP_BASE + LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
+- printk(KERN_ERR
+- "fixmap and kmap areas overlap - this will crash\n");
+- printk(KERN_ERR "pkstart: %lxh pkend: %lxh fixstart %lxh\n",
+- PKMAP_BASE, PKMAP_BASE + LAST_PKMAP*PAGE_SIZE,
+- FIXADDR_START);
+- BUG();
+- }
+-#endif
+ /* this will put all low memory onto the freelists */
+ totalram_pages += free_all_bootmem();
+ /* XEN: init and count low-mem pages outside initial allocation. */
+@@ -636,7 +972,7 @@ void __init mem_init(void)
+ if (page_is_ram(tmp) && PageReserved(pfn_to_page(tmp)))
+ reservedpages++;
+
+- set_highmem_pages_init(bad_ppro);
++ set_highmem_pages_init();
+
+ codesize = (unsigned long) &_etext - (unsigned long) &_text;
+ datasize = (unsigned long) &_edata - (unsigned long) &_etext;
+@@ -657,7 +993,6 @@ void __init mem_init(void)
+ (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))
+ );
+
+-#if 1 /* double-sanity-check paranoia */
+ printk(KERN_INFO "virtual kernel memory layout:\n"
+ " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
+ #ifdef CONFIG_HIGHMEM
+@@ -698,7 +1033,6 @@ void __init mem_init(void)
+ #endif
+ BUG_ON(VMALLOC_START > VMALLOC_END);
+ BUG_ON((unsigned long)high_memory > VMALLOC_START);
+-#endif /* double-sanity-check paranoia */
+
+ if (boot_cpu_data.wp_works_ok < 0)
+ test_wp_bit();
+@@ -755,6 +1089,8 @@ void mark_rodata_ro(void)
+ unsigned long start = PFN_ALIGN(_text);
+ unsigned long size = PFN_ALIGN(_etext) - start;
+
++#ifndef CONFIG_DYNAMIC_FTRACE
++ /* Dynamic tracing modifies the kernel text section */
+ set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
+ printk(KERN_INFO "Write protecting the kernel text: %luk\n",
+ size >> 10);
+@@ -767,6 +1103,8 @@ void mark_rodata_ro(void)
+ printk(KERN_INFO "Testing CPA: write protecting again\n");
+ set_pages_ro(virt_to_page(start), size>>PAGE_SHIFT);
+ #endif
++#endif /* CONFIG_DYNAMIC_FTRACE */
++
+ start += size;
+ size = (unsigned long)__end_rodata - start;
+ set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
+@@ -829,3 +1167,9 @@ void free_initrd_mem(unsigned long start
+ free_init_pages("initrd memory", start, end);
+ }
+ #endif
++
++int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
++ int flags)
++{
++ return reserve_bootmem(phys, len, flags);
++}
+Index: head-2008-12-01/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_64-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_64-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -21,6 +21,7 @@
+ #include <linux/swap.h>
+ #include <linux/smp.h>
+ #include <linux/init.h>
++#include <linux/initrd.h>
+ #include <linux/pagemap.h>
+ #include <linux/bootmem.h>
+ #include <linux/proc_fs.h>
+@@ -52,6 +53,14 @@
+
+ #include <xen/features.h>
+
++/*
++ * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
++ * The direct mapping extends to max_pfn_mapped, so that we can directly access
++ * apertures, ACPI and other tables without having to play with fixmaps.
++ */
++unsigned long max_low_pfn_mapped;
++unsigned long max_pfn_mapped;
++
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ unsigned int __kernel_page_user;
+ EXPORT_SYMBOL(__kernel_page_user);
+@@ -60,12 +69,11 @@ EXPORT_SYMBOL(__kernel_page_user);
+ int after_bootmem;
+
+ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+-extern unsigned long start_pfn;
+
+ extern pmd_t level2_fixmap_pgt[PTRS_PER_PMD];
+ extern pte_t level1_fixmap_pgt[PTRS_PER_PTE];
+
+-int direct_gbpages __meminitdata
++int direct_gbpages
+ #ifdef CONFIG_DIRECT_GBPAGES
+ = 1
+ #endif
+@@ -145,55 +153,23 @@ void __meminit early_make_page_readonly(
+ * around without checking the pgd every time.
+ */
+
+-void show_mem(void)
+-{
+- long i, total = 0, reserved = 0;
+- long shared = 0, cached = 0;
+- struct page *page;
+- pg_data_t *pgdat;
+-
+- printk(KERN_INFO "Mem-info:\n");
+- show_free_areas();
+- for_each_online_pgdat(pgdat) {
+- for (i = 0; i < pgdat->node_spanned_pages; ++i) {
+- /*
+- * This loop can take a while with 256 GB and
+- * 4k pages so defer the NMI watchdog:
+- */
+- if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
+- touch_nmi_watchdog();
+-
+- if (!pfn_valid(pgdat->node_start_pfn + i))
+- continue;
+-
+- page = pfn_to_page(pgdat->node_start_pfn + i);
+- total++;
+- if (PageReserved(page))
+- reserved++;
+- else if (PageSwapCache(page))
+- cached++;
+- else if (page_count(page))
+- shared += page_count(page) - 1;
+- }
+- }
+- printk(KERN_INFO "%lu pages of RAM\n", total);
+- printk(KERN_INFO "%lu reserved pages\n", reserved);
+- printk(KERN_INFO "%lu pages shared\n", shared);
+- printk(KERN_INFO "%lu pages swap cached\n", cached);
+-}
+-
+ static unsigned long __meminitdata table_start;
++static unsigned long __meminitdata table_cur;
+ static unsigned long __meminitdata table_end;
+
+-static __init void *spp_getpage(void)
++/*
++ * NOTE: This function is marked __ref because it calls __init function
++ * (alloc_bootmem_pages). It's safe to do it ONLY when after_bootmem == 0.
++ */
++static __ref void *spp_getpage(void)
+ {
+ void *ptr;
+
+ if (after_bootmem)
+ ptr = (void *) get_zeroed_page(GFP_ATOMIC);
+- else if (start_pfn < table_end) {
+- ptr = __va(start_pfn << PAGE_SHIFT);
+- start_pfn++;
++ else if (table_cur < table_end) {
++ ptr = __va(table_cur << PAGE_SHIFT);
++ table_cur++;
+ memset(ptr, 0, PAGE_SIZE);
+ } else
+ ptr = alloc_bootmem_pages(PAGE_SIZE);
+@@ -208,30 +184,18 @@ static __init void *spp_getpage(void)
+ return ptr;
+ }
+
+-#define pgd_offset_u(address) (__user_pgd(init_level4_pgt) + pgd_index(address))
+-#define pud_offset_u(address) (level3_user_pgt + pud_index(address))
+-
+-static __init void
+-set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot, int user_mode)
++void
++set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte)
+ {
+- pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+- pte_t *pte, new_pte;
+-
+- pr_debug("set_pte_phys %lx to %lx\n", vaddr, phys);
++ pte_t *pte;
+
+- pgd = (user_mode ? pgd_offset_u(vaddr) : pgd_offset_k(vaddr));
+- if (pgd_none(*pgd)) {
+- printk(KERN_ERR
+- "PGD FIXMAP MISSING, it should be setup in head.S!\n");
+- return;
+- }
+- pud = (user_mode ? pud_offset_u(vaddr) : pud_offset(pgd, vaddr));
++ pud = pud_page + pud_index(vaddr);
+ if (pud_none(*pud)) {
+ pmd = (pmd_t *) spp_getpage();
+ make_page_readonly(pmd, XENFEAT_writable_page_tables);
+- set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
++ pud_populate(&init_mm, pud, pmd);
+ if (pmd != pmd_offset(pud, 0)) {
+ printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n",
+ pmd, pmd_offset(pud, 0));
+@@ -242,19 +206,20 @@ set_pte_phys(unsigned long vaddr, unsign
+ if (pmd_none(*pmd)) {
+ pte = (pte_t *) spp_getpage();
+ make_page_readonly(pte, XENFEAT_writable_page_tables);
+- set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
++ pmd_populate_kernel(&init_mm, pmd, pte);
+ if (pte != pte_offset_kernel(pmd, 0)) {
+ printk(KERN_ERR "PAGETABLE BUG #02!\n");
+ return;
+ }
+ }
+- if (pgprot_val(prot))
+- new_pte = pfn_pte(phys >> PAGE_SHIFT, prot);
+- else
+- new_pte = __pte(0);
+
+ pte = pte_offset_kernel(pmd, vaddr);
+ if (!pte_none(*pte) && __pte_val(new_pte) &&
++#ifdef CONFIG_ACPI
++ /* __acpi_map_table() fails to properly call clear_fixmap() */
++ (vaddr < __fix_to_virt(FIX_ACPI_END) ||
++ vaddr > __fix_to_virt(FIX_ACPI_BEGIN)) &&
++#endif
+ __pte_val(*pte) != (__pte_val(new_pte) & __supported_pte_mask))
+ pte_ERROR(*pte);
+ set_pte(pte, new_pte);
+@@ -266,15 +231,13 @@ set_pte_phys(unsigned long vaddr, unsign
+ __flush_tlb_one(vaddr);
+ }
+
+-static __init void
+-set_pte_phys_ma(unsigned long vaddr, unsigned long phys, pgprot_t prot)
++void
++set_pte_vaddr(unsigned long vaddr, pte_t pteval)
+ {
+ pgd_t *pgd;
+- pud_t *pud;
+- pmd_t *pmd;
+- pte_t *pte, new_pte;
++ pud_t *pud_page;
+
+- pr_debug("set_pte_phys_ma %lx to %lx\n", vaddr, phys);
++ pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, __pte_val(pteval));
+
+ pgd = pgd_offset_k(vaddr);
+ if (pgd_none(*pgd)) {
+@@ -282,47 +245,51 @@ set_pte_phys_ma(unsigned long vaddr, uns
+ "PGD FIXMAP MISSING, it should be setup in head.S!\n");
+ return;
+ }
+- pud = pud_offset(pgd, vaddr);
+- if (pud_none(*pud)) {
+- pmd = (pmd_t *) spp_getpage();
+- make_page_readonly(pmd, XENFEAT_writable_page_tables);
+- set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
+- if (pmd != pmd_offset(pud, 0)) {
+- printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n",
+- pmd, pmd_offset(pud, 0));
++ pud_page = (pud_t*)pgd_page_vaddr(*pgd);
++ set_pte_vaddr_pud(pud_page, vaddr, pteval);
++}
++
++#ifndef CONFIG_XEN
++/*
++ * Create large page table mappings for a range of physical addresses.
++ */
++static void __init __init_extra_mapping(unsigned long phys, unsigned long size,
++ pgprot_t prot)
++{
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++
++ BUG_ON((phys & ~PMD_MASK) || (size & ~PMD_MASK));
++ for (; size; phys += PMD_SIZE, size -= PMD_SIZE) {
++ pgd = pgd_offset_k((unsigned long)__va(phys));
++ if (pgd_none(*pgd)) {
++ pud = (pud_t *) spp_getpage();
++ set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE |
++ _PAGE_USER));
+ }
+- }
+- pmd = pmd_offset(pud, vaddr);
+- if (pmd_none(*pmd)) {
+- pte = (pte_t *) spp_getpage();
+- make_page_readonly(pte, XENFEAT_writable_page_tables);
+- set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
+- if (pte != pte_offset_kernel(pmd, 0)) {
+- printk(KERN_ERR "PAGETABLE BUG #02!\n");
+- return;
++ pud = pud_offset(pgd, (unsigned long)__va(phys));
++ if (pud_none(*pud)) {
++ pmd = (pmd_t *) spp_getpage();
++ set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE |
++ _PAGE_USER));
+ }
++ pmd = pmd_offset(pud, phys);
++ BUG_ON(!pmd_none(*pmd));
++ set_pmd(pmd, __pmd(phys | pgprot_val(prot)));
+ }
+- new_pte = pfn_pte_ma(phys >> PAGE_SHIFT, prot);
++}
+
+- pte = pte_offset_kernel(pmd, vaddr);
+- if (!pte_none(*pte) && __pte_val(new_pte) &&
+-#ifdef CONFIG_ACPI
+- /* __acpi_map_table() fails to properly call clear_fixmap() */
+- (vaddr < __fix_to_virt(FIX_ACPI_END) ||
+- vaddr > __fix_to_virt(FIX_ACPI_BEGIN)) &&
+-#endif
+- __pte_val(*pte) != (__pte_val(new_pte) & __supported_pte_mask))
+- pte_ERROR(*pte);
+- set_pte(pte, new_pte);
++void __init init_extra_mapping_wb(unsigned long phys, unsigned long size)
++{
++ __init_extra_mapping(phys, size, PAGE_KERNEL_LARGE);
++}
+
+- /*
+- * It's enough to flush this one mapping.
+- * (PGE mappings get flushed as well)
+- */
+- __flush_tlb_one(vaddr);
++void __init init_extra_mapping_uc(unsigned long phys, unsigned long size)
++{
++ __init_extra_mapping(phys, size, PAGE_KERNEL_LARGE_NOCACHE);
+ }
+
+-#ifndef CONFIG_XEN
+ /*
+ * The head.S code sets up the kernel high mapping:
+ *
+@@ -352,33 +319,9 @@ void __init cleanup_highmap(void)
+ }
+ #endif
+
+-/* NOTE: this is meant to be run only at boot */
+-void __init __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
+-{
+- unsigned long address = __fix_to_virt(idx);
+-
+- if (idx >= __end_of_fixed_addresses) {
+- printk(KERN_ERR "Invalid __set_fixmap\n");
+- return;
+- }
+- switch (idx) {
+- case VSYSCALL_LAST_PAGE ... VSYSCALL_FIRST_PAGE:
+- set_pte_phys(address, phys, prot, 0);
+- set_pte_phys(address, phys, prot, 1);
+- break;
+- case FIX_EARLYCON_MEM_BASE:
+- xen_l1_entry_update(level1_fixmap_pgt + pte_index(address),
+- pfn_pte_ma(phys >> PAGE_SHIFT, prot));
+- break;
+- default:
+- set_pte_phys_ma(address, phys, prot);
+- break;
+- }
+-}
+-
+ static __meminit void *alloc_static_page(unsigned long *phys)
+ {
+- unsigned long va = (start_pfn << PAGE_SHIFT) + __START_KERNEL_map;
++ unsigned long va = (table_cur << PAGE_SHIFT) + __START_KERNEL_map;
+
+ if (after_bootmem) {
+ void *adr = (void *)get_zeroed_page(GFP_ATOMIC);
+@@ -387,13 +330,12 @@ static __meminit void *alloc_static_page
+ return adr;
+ }
+
+- *phys = start_pfn << PAGE_SHIFT;
+- start_pfn++;
+- memset((void *)va, 0, PAGE_SIZE);
+- return (void *)va;
++ BUG_ON(!table_cur);
++ *phys = table_cur++ << PAGE_SHIFT;
++ return memset((void *)va, 0, PAGE_SIZE);
+ }
+
+-#define PTE_SIZE PAGE_SIZE
++#define unmap_low_page(p) ((void)(p))
+
+ static inline int __meminit make_readonly(unsigned long paddr)
+ {
+@@ -408,7 +350,7 @@ static inline int __meminit make_readonl
+ /* Make old page tables read-only. */
+ if (!xen_feature(XENFEAT_writable_page_tables)
+ && (paddr >= (xen_start_info->pt_base - __START_KERNEL_map))
+- && (paddr < (start_pfn << PAGE_SHIFT)))
++ && (paddr < (table_cur << PAGE_SHIFT)))
+ readonly = 1;
+
+ /*
+@@ -425,118 +367,129 @@ static inline int __meminit make_readonl
+ return readonly;
+ }
+
+-#ifndef CONFIG_XEN
+-/* Must run before zap_low_mappings */
+-__meminit void *early_ioremap(unsigned long addr, unsigned long size)
++static unsigned long __meminit
++phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end)
+ {
+- pmd_t *pmd, *last_pmd;
+- unsigned long vaddr;
+- int i, pmds;
+-
+- pmds = ((addr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
+- vaddr = __START_KERNEL_map;
+- pmd = level2_kernel_pgt;
+- last_pmd = level2_kernel_pgt + PTRS_PER_PMD - 1;
+-
+- for (; pmd <= last_pmd; pmd++, vaddr += PMD_SIZE) {
+- for (i = 0; i < pmds; i++) {
+- if (pmd_present(pmd[i]))
+- goto continue_outer_loop;
+- }
+- vaddr += addr & ~PMD_MASK;
+- addr &= PMD_MASK;
++ unsigned pages = 0;
++ unsigned long last_map_addr = end;
++ int i;
+
+- for (i = 0; i < pmds; i++, addr += PMD_SIZE)
+- set_pmd(pmd+i, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC));
+- __flush_tlb_all();
+-
+- return (void *)vaddr;
+-continue_outer_loop:
+- ;
++ pte_t *pte = pte_page + pte_index(addr);
++
++ for(i = pte_index(addr); i < PTRS_PER_PTE; i++, addr += PAGE_SIZE, pte++) {
++ unsigned long pteval = addr | __PAGE_KERNEL;
++
++ if (addr >= (after_bootmem
++ ? end
++ : xen_start_info->nr_pages << PAGE_SHIFT))
++ break;
++
++ if (__pte_val(*pte))
++ continue;
++
++ if (make_readonly(addr))
++ pteval &= ~_PAGE_RW;
++ if (0)
++ printk(" pte=%p addr=%lx pte=%016lx\n",
++ pte, addr, pteval);
++ if (!after_bootmem)
++ *pte = __pte(pteval & __supported_pte_mask);
++ else
++ set_pte(pte, __pte(pteval & __supported_pte_mask));
++ last_map_addr = (addr & PAGE_MASK) + PAGE_SIZE;
++ pages++;
+ }
+- printk("early_ioremap(0x%lx, %lu) failed\n", addr, size);
+- return NULL;
++ update_page_count(PG_LEVEL_4K, pages);
++
++ return last_map_addr;
+ }
+
+-/*
+- * To avoid virtual aliases later:
+- */
+-__meminit void early_iounmap(void *addr, unsigned long size)
++static unsigned long __meminit
++phys_pte_update(pmd_t *pmd, unsigned long address, unsigned long end)
+ {
+- unsigned long vaddr;
+- pmd_t *pmd;
+- int i, pmds;
+-
+- vaddr = (unsigned long)addr;
+- pmds = ((vaddr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
+- pmd = level2_kernel_pgt + pmd_index(vaddr);
++ pte_t *pte = (pte_t *)pmd_page_vaddr(*pmd);
+
+- for (i = 0; i < pmds; i++)
+- pmd_clear(pmd + i);
+-
+- __flush_tlb_all();
++ BUG_ON(!after_bootmem);
++ return phys_pte_init(pte, address, end);
+ }
+-#endif
+
+ static unsigned long __meminit
+-phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end)
++phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
++ unsigned long page_size_mask)
+ {
++ unsigned long pages = 0;
++ unsigned long last_map_addr = end;
++ unsigned long start = address;
++
+ int i = pmd_index(address);
+
+- for (; i < PTRS_PER_PMD; i++) {
++ for (; i < PTRS_PER_PMD; i++, address += PMD_SIZE) {
+ unsigned long pte_phys;
+- pmd_t *pmd = pmd_page + i;
+- pte_t *pte, *pte_save;
+- int k;
++ pmd_t *pmd = pmd_page + pmd_index(address);
++ pte_t *pte;
+
+ if (address >= end)
+ break;
+
+ if (__pmd_val(*pmd)) {
+- address += PMD_SIZE;
++ if (!pmd_large(*pmd)) {
++ spin_lock(&init_mm.page_table_lock);
++ last_map_addr = phys_pte_update(pmd, address,
++ end);
++ spin_unlock(&init_mm.page_table_lock);
++ }
++ /* Count entries we're using from level2_ident_pgt */
++ if (start == 0)
++ pages++;
+ continue;
+ }
+
+- pte = alloc_static_page(&pte_phys);
+- pte_save = pte;
+- for (k = 0; k < PTRS_PER_PTE; pte++, k++, address += PTE_SIZE) {
+- unsigned long pteval = address | _PAGE_NX | _KERNPG_TABLE;
+-
+- if (address >= (after_bootmem
+- ? end
+- : xen_start_info->nr_pages << PAGE_SHIFT))
+- pteval = 0;
+- else if (make_readonly(address))
+- pteval &= ~_PAGE_RW;
+- set_pte(pte, __pte(pteval & __supported_pte_mask));
++ if (page_size_mask & (1<<PG_LEVEL_2M)) {
++ pages++;
++ spin_lock(&init_mm.page_table_lock);
++ set_pte((pte_t *)pmd,
++ pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
++ spin_unlock(&init_mm.page_table_lock);
++ last_map_addr = (address & PMD_MASK) + PMD_SIZE;
++ continue;
+ }
++
++ pte = alloc_static_page(&pte_phys);
++ last_map_addr = phys_pte_init(pte, address, end);
++ unmap_low_page(pte);
++
+ if (!after_bootmem) {
+- early_make_page_readonly(pte_save, XENFEAT_writable_page_tables);
+- *pmd = __pmd(pte_phys | _KERNPG_TABLE);
++ early_make_page_readonly(pte, XENFEAT_writable_page_tables);
++ *pmd = __pmd(pte_phys | _PAGE_TABLE);
+ } else {
+- make_page_readonly(pte_save, XENFEAT_writable_page_tables);
+- set_pmd(pmd, __pmd(pte_phys | _KERNPG_TABLE));
++ make_page_readonly(pte, XENFEAT_writable_page_tables);
++ spin_lock(&init_mm.page_table_lock);
++ pmd_populate_kernel(&init_mm, pmd, __va(pte_phys));
++ spin_unlock(&init_mm.page_table_lock);
+ }
+ }
+- return address;
++ update_page_count(PG_LEVEL_2M, pages);
++ return last_map_addr;
+ }
+
+ static unsigned long __meminit
+-phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end)
++phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end,
++ unsigned long page_size_mask)
+ {
+ pmd_t *pmd = pmd_offset(pud, 0);
+ unsigned long last_map_addr;
+
+- spin_lock(&init_mm.page_table_lock);
+- last_map_addr = phys_pmd_init(pmd, address, end);
+- spin_unlock(&init_mm.page_table_lock);
++ BUG_ON(!after_bootmem);
++ last_map_addr = phys_pmd_init(pmd, address, end, page_size_mask);
+ __flush_tlb_all();
+ return last_map_addr;
+ }
+
+ static unsigned long __meminit
+-phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end)
++phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
++ unsigned long page_size_mask)
+ {
++ unsigned long pages = 0;
+ unsigned long last_map_addr = end;
+ int i = pud_index(addr);
+
+@@ -550,29 +503,59 @@ phys_pud_init(pud_t *pud_page, unsigned
+
+ if (__pud_val(*pud)) {
+ if (!pud_large(*pud))
+- last_map_addr = phys_pmd_update(pud, addr, end);
++ last_map_addr = phys_pmd_update(pud, addr, end,
++ page_size_mask);
+ continue;
+ }
+
+- if (direct_gbpages) {
++ if (page_size_mask & (1<<PG_LEVEL_1G)) {
++ pages++;
++ spin_lock(&init_mm.page_table_lock);
+ set_pte((pte_t *)pud,
+ pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
++ spin_unlock(&init_mm.page_table_lock);
+ last_map_addr = (addr & PUD_MASK) + PUD_SIZE;
+ continue;
+ }
+
+ pmd = alloc_static_page(&pmd_phys);
++ last_map_addr = phys_pmd_init(pmd, addr, end, page_size_mask);
++ unmap_low_page(pmd);
+
+- spin_lock(&init_mm.page_table_lock);
+- *pud = __pud(pmd_phys | _KERNPG_TABLE);
+- last_map_addr = phys_pmd_init(pmd, addr, end);
+- spin_unlock(&init_mm.page_table_lock);
+-
+- early_make_page_readonly(pmd, XENFEAT_writable_page_tables);
++ if (!after_bootmem) {
++ early_make_page_readonly(pmd, XENFEAT_writable_page_tables);
++ if (page_size_mask & (1 << PG_LEVEL_NUM))
++ xen_l3_entry_update(pud, __pud(pmd_phys | _PAGE_TABLE));
++ else
++ *pud = __pud(pmd_phys | _PAGE_TABLE);
++ } else {
++ make_page_readonly(pmd, XENFEAT_writable_page_tables);
++ spin_lock(&init_mm.page_table_lock);
++ pud_populate(&init_mm, pud, __va(pmd_phys));
++ spin_unlock(&init_mm.page_table_lock);
++ }
+ }
+ __flush_tlb_all();
++ update_page_count(PG_LEVEL_1G, pages);
+
+- return last_map_addr >> PAGE_SHIFT;
++ return last_map_addr;
++}
++
++static unsigned long __meminit
++phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end,
++ unsigned long page_size_mask)
++{
++ pud_t *pud;
++
++ if (!after_bootmem) {
++ unsigned long addr = __pgd_val(*pgd), *page;
++
++ addr_to_page(addr, page);
++ pud = (pud_t *)page;
++ } else
++ pud = (pud_t *)pgd_page_vaddr(*pgd);
++
++ return phys_pud_init(pud, addr, end, page_size_mask | (1 << PG_LEVEL_NUM));
+ }
+
+ void __init xen_init_pt(void)
+@@ -654,7 +637,7 @@ void __init xen_init_pt(void)
+ static void __init extend_init_mapping(unsigned long tables_space)
+ {
+ unsigned long va = __START_KERNEL_map;
+- unsigned long start = start_pfn;
++ unsigned long start = table_cur;
+ unsigned long phys, addr, *pte_page;
+ pmd_t *pmd;
+ pte_t *pte, new_pte;
+@@ -674,7 +657,7 @@ static void __init extend_init_mapping(u
+
+ /* Ensure init mappings cover kernel text/data and initial tables. */
+ while (va < (__START_KERNEL_map
+- + (start_pfn << PAGE_SHIFT)
++ + (table_cur << PAGE_SHIFT)
+ + tables_space)) {
+ pmd = (pmd_t *)&page[pmd_index(va)];
+ if (pmd_none(*pmd)) {
+@@ -706,9 +689,9 @@ static void __init extend_init_mapping(u
+ va += PAGE_SIZE;
+ }
+
+- if (start_pfn > start)
++ if (table_cur > start)
+ reserve_early(start << PAGE_SHIFT,
+- start_pfn << PAGE_SHIFT, "INITMAP");
++ table_cur << PAGE_SHIFT, "INITMAP");
+ }
+
+ static void __init find_early_table_space(unsigned long end)
+@@ -717,23 +700,25 @@ static void __init find_early_table_spac
+
+ puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
+ pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
+- ptes = (end + PTE_SIZE - 1) >> PAGE_SHIFT;
++ ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
+
+ tables = round_up(puds * 8, PAGE_SIZE) +
+ round_up(pmds * 8, PAGE_SIZE) +
+ round_up(ptes * 8, PAGE_SIZE);
+
++ table_cur = (__pa(xen_start_info->pt_base) >> PAGE_SHIFT) +
++ xen_start_info->nr_pt_frames;
++
+ extend_init_mapping(tables);
+
+- table_start = start_pfn;
++ table_start = table_cur;
+ table_end = table_start + (tables>>PAGE_SHIFT);
+
+- early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n",
+- end, table_start << PAGE_SHIFT,
+- (table_start << PAGE_SHIFT) + tables);
++ printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
++ end, table_start << PAGE_SHIFT, table_end << PAGE_SHIFT);
+ }
+
+-static void __init xen_finish_init_mapping(void)
++static void __init xen_finish_init_mapping(bool reserve)
+ {
+ unsigned long i, start, end;
+
+@@ -762,7 +747,8 @@ static void __init xen_finish_init_mappi
+ if (HYPERVISOR_update_va_mapping(start, __pte_ma(0), 0))
+ BUG();
+
+- /* Allocate pte's for initial fixmaps from 'start_pfn' allocator. */
++ /* Allocate pte's for initial fixmaps from 'table_cur' allocator. */
++ start = table_cur;
+ table_end = ~0UL;
+
+ /*
+@@ -789,8 +775,11 @@ static void __init xen_finish_init_mappi
+ << PAGE_SHIFT,
+ PAGE_KERNEL_RO);
+
+- /* Disable the 'start_pfn' allocator. */
+- table_end = start_pfn;
++ /* Disable the 'table_cur' allocator. */
++ table_end = table_cur;
++ if (reserve && table_cur > start)
++ reserve_early(start << PAGE_SHIFT,
++ table_cur << PAGE_SHIFT, "FIXMAP");
+ }
+
+ static void __init init_gbpages(void)
+@@ -801,126 +790,89 @@ static void __init init_gbpages(void)
+ direct_gbpages = 0;
+ }
+
+-#ifdef CONFIG_MEMTEST_BOOTPARAM
+-
+-static void __init memtest(unsigned long start_phys, unsigned long size,
+- unsigned pattern)
++static unsigned long __init kernel_physical_mapping_init(unsigned long start,
++ unsigned long end,
++ unsigned long page_size_mask)
+ {
+- unsigned long i;
+- unsigned long *start;
+- unsigned long start_bad;
+- unsigned long last_bad;
+- unsigned long val;
+- unsigned long start_phys_aligned;
+- unsigned long count;
+- unsigned long incr;
+-
+- switch (pattern) {
+- case 0:
+- val = 0UL;
+- break;
+- case 1:
+- val = -1UL;
+- break;
+- case 2:
+- val = 0x5555555555555555UL;
+- break;
+- case 3:
+- val = 0xaaaaaaaaaaaaaaaaUL;
+- break;
+- default:
+- return;
+- }
+
+- incr = sizeof(unsigned long);
+- start_phys_aligned = ALIGN(start_phys, incr);
+- count = (size - (start_phys_aligned - start_phys))/incr;
+- start = __va(start_phys_aligned);
+- start_bad = 0;
+- last_bad = 0;
+-
+- for (i = 0; i < count; i++)
+- start[i] = val;
+- for (i = 0; i < count; i++, start++, start_phys_aligned += incr) {
+- if (*start != val) {
+- if (start_phys_aligned == last_bad + incr) {
+- last_bad += incr;
+- } else {
+- if (start_bad) {
+- printk(KERN_CONT "\n %016lx bad mem addr %016lx - %016lx reserved",
+- val, start_bad, last_bad + incr);
+- reserve_early(start_bad, last_bad - start_bad, "BAD RAM");
+- }
+- start_bad = last_bad = start_phys_aligned;
+- }
+- }
+- }
+- if (start_bad) {
+- printk(KERN_CONT "\n %016lx bad mem addr %016lx - %016lx reserved",
+- val, start_bad, last_bad + incr);
+- reserve_early(start_bad, last_bad - start_bad, "BAD RAM");
+- }
+-
+-}
+-
+-static int memtest_pattern __initdata = CONFIG_MEMTEST_BOOTPARAM_VALUE;
+-
+-static int __init parse_memtest(char *arg)
+-{
+- if (arg)
+- memtest_pattern = simple_strtoul(arg, NULL, 0);
+- return 0;
+-}
++ unsigned long next, last_map_addr = end;
+
+-early_param("memtest", parse_memtest);
++ start = (unsigned long)__va(start);
++ end = (unsigned long)__va(end);
+
+-static void __init early_memtest(unsigned long start, unsigned long end)
+-{
+- u64 t_start, t_size;
+- unsigned pattern;
++ for (; start < end; start = next) {
++ pgd_t *pgd = pgd_offset_k(start);
++ unsigned long pud_phys;
++ pud_t *pud;
+
+- if (!memtest_pattern)
+- return;
++ next = (start + PGDIR_SIZE) & PGDIR_MASK;
++ if (next > end)
++ next = end;
+
+- printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern);
+- for (pattern = 0; pattern < memtest_pattern; pattern++) {
+- t_start = start;
+- t_size = 0;
+- while (t_start < end) {
+- t_start = find_e820_area_size(t_start, &t_size, 1);
+-
+- /* done ? */
+- if (t_start >= end)
+- break;
+- if (t_start + t_size > end)
+- t_size = end - t_start;
+-
+- printk(KERN_CONT "\n %016llx - %016llx pattern %d",
+- (unsigned long long)t_start,
+- (unsigned long long)t_start + t_size, pattern);
++ if (__pgd_val(*pgd)) {
++ last_map_addr = phys_pud_update(pgd, __pa(start),
++ __pa(end), page_size_mask);
++ continue;
++ }
+
+- memtest(t_start, t_size, pattern);
++ pud = alloc_static_page(&pud_phys);
++ last_map_addr = phys_pud_init(pud, __pa(start), __pa(next),
++ page_size_mask);
++ unmap_low_page(pud);
+
+- t_start += t_size;
++ if(!after_bootmem) {
++ early_make_page_readonly(pud, XENFEAT_writable_page_tables);
++ xen_l4_entry_update(pgd, __pgd(pud_phys | _PAGE_TABLE));
++ } else {
++ make_page_readonly(pud, XENFEAT_writable_page_tables);
++ spin_lock(&init_mm.page_table_lock);
++ pgd_populate(&init_mm, pgd, __va(pud_phys));
++ spin_unlock(&init_mm.page_table_lock);
+ }
+ }
+- printk(KERN_CONT "\n");
++
++ return last_map_addr;
+ }
+-#else
+-static void __init early_memtest(unsigned long start, unsigned long end)
++
++struct map_range {
++ unsigned long start;
++ unsigned long end;
++ unsigned page_size_mask;
++};
++
++#define NR_RANGE_MR 5
++
++static int save_mr(struct map_range *mr, int nr_range,
++ unsigned long start_pfn, unsigned long end_pfn,
++ unsigned long page_size_mask)
+ {
++
++ if (start_pfn < end_pfn) {
++ if (nr_range >= NR_RANGE_MR)
++ panic("run out of range for init_memory_mapping\n");
++ mr[nr_range].start = start_pfn<<PAGE_SHIFT;
++ mr[nr_range].end = end_pfn<<PAGE_SHIFT;
++ mr[nr_range].page_size_mask = page_size_mask;
++ nr_range++;
++ }
++
++ return nr_range;
+ }
+-#endif
+
+ /*
+ * Setup the direct mapping of the physical memory at PAGE_OFFSET.
+ * This runs before bootmem is initialized and gets pages directly from
+ * the physical memory. To access them they are temporarily mapped.
+ */
+-unsigned long __init_refok init_memory_mapping(unsigned long start, unsigned long end)
++unsigned long __init_refok init_memory_mapping(unsigned long start,
++ unsigned long end)
+ {
+- unsigned long next, last_map_addr = end;
+- unsigned long start_phys = start, end_phys = end;
++ unsigned long last_map_addr = 0;
++ unsigned long page_size_mask = 0;
++ unsigned long start_pfn, end_pfn;
++ bool first = !table_start;
++ struct map_range mr[NR_RANGE_MR];
++ int nr_range, i;
+
+ printk(KERN_INFO "init_memory_mapping\n");
+
+@@ -931,51 +883,123 @@ unsigned long __init_refok init_memory_m
+ * memory mapped. Unfortunately this is done currently before the
+ * nodes are discovered.
+ */
+- if (!after_bootmem) {
++ if (!after_bootmem)
+ init_gbpages();
+- find_early_table_space(end);
+- }
+
+- start = (unsigned long)__va(start);
+- end = (unsigned long)__va(end);
++ if (direct_gbpages)
++ page_size_mask |= 1 << PG_LEVEL_1G;
++ if (cpu_has_pse)
++ page_size_mask |= 1 << PG_LEVEL_2M;
++
++ memset(mr, 0, sizeof(mr));
++ nr_range = 0;
++
++ /* head if not big page alignment ?*/
++ start_pfn = start >> PAGE_SHIFT;
++ end_pfn = ((start + (PMD_SIZE - 1)) >> PMD_SHIFT)
++ << (PMD_SHIFT - PAGE_SHIFT);
++ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
++
++ /* big page (2M) range*/
++ start_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
++ << (PMD_SHIFT - PAGE_SHIFT);
++ end_pfn = ((start + (PUD_SIZE - 1))>>PUD_SHIFT)
++ << (PUD_SHIFT - PAGE_SHIFT);
++ if (end_pfn > ((end>>PUD_SHIFT)<<(PUD_SHIFT - PAGE_SHIFT)))
++ end_pfn = ((end>>PUD_SHIFT)<<(PUD_SHIFT - PAGE_SHIFT));
++ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
++ page_size_mask & (1<<PG_LEVEL_2M));
++
++ /* big page (1G) range */
++ start_pfn = end_pfn;
++ end_pfn = (end>>PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
++ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
++ page_size_mask &
++ ((1<<PG_LEVEL_2M)|(1<<PG_LEVEL_1G)));
++
++ /* tail is not big page (1G) alignment */
++ start_pfn = end_pfn;
++ end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
++ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
++ page_size_mask & (1<<PG_LEVEL_2M));
++
++ /* tail is not big page (2M) alignment */
++ start_pfn = end_pfn;
++ end_pfn = end>>PAGE_SHIFT;
++ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
++
++ /* try to merge same page size and continuous */
++ for (i = 0; nr_range > 1 && i < nr_range - 1; i++) {
++ unsigned long old_start;
++ if (mr[i].end != mr[i+1].start ||
++ mr[i].page_size_mask != mr[i+1].page_size_mask)
++ continue;
++ /* move it */
++ old_start = mr[i].start;
++ memmove(&mr[i], &mr[i+1],
++ (nr_range - 1 - i) * sizeof (struct map_range));
++ mr[i--].start = old_start;
++ nr_range--;
++ }
+
+- for (; start < end; start = next) {
+- pgd_t *pgd = pgd_offset_k(start);
+- unsigned long pud_phys;
+- pud_t *pud;
++ for (i = 0; i < nr_range; i++)
++ printk(KERN_DEBUG " %010lx - %010lx page %s\n",
++ mr[i].start, mr[i].end,
++ (mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
++ (mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
+
+- if (after_bootmem)
+- pud = pud_offset(pgd, start & PGDIR_MASK);
+- else
+- pud = alloc_static_page(&pud_phys);
+- next = start + PGDIR_SIZE;
+- if (next > end)
+- next = end;
+- last_map_addr = phys_pud_init(pud, __pa(start), __pa(next));
+- if (!after_bootmem) {
+- early_make_page_readonly(pud, XENFEAT_writable_page_tables);
+- set_pgd(pgd_offset_k(start), mk_kernel_pgd(pud_phys));
+- }
+- }
++ if (first)
++ find_early_table_space(end);
+
+- if (!after_bootmem) {
+- BUG_ON(start_pfn != table_end);
+- xen_finish_init_mapping();
++ for (i = 0; i < nr_range; i++)
++ last_map_addr = kernel_physical_mapping_init(
++ mr[i].start, mr[i].end,
++ mr[i].page_size_mask);
++
++ BUG_ON(table_cur > table_end);
++ if (start < (table_start << PAGE_SHIFT)) {
++ WARN_ON(table_cur != table_end);
++ xen_finish_init_mapping(!first);
+ }
+
+ __flush_tlb_all();
+
+- if (!after_bootmem)
++ if (first && table_end > table_start)
+ reserve_early(table_start << PAGE_SHIFT,
+ table_end << PAGE_SHIFT, "PGTABLE");
+
++ printk(KERN_INFO "last_map_addr: %lx end: %lx\n",
++ last_map_addr, end);
++
+ if (!after_bootmem)
+- early_memtest(start_phys, end_phys);
++ early_memtest(start, end);
+
+- return last_map_addr;
++ return last_map_addr >> PAGE_SHIFT;
+ }
+
+ #ifndef CONFIG_NUMA
++void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn)
++{
++ unsigned long bootmap_size, bootmap;
++
++ e820_register_active_regions(0, start_pfn, end_pfn);
++#ifdef CONFIG_XEN
++ if (end_pfn > xen_start_info->nr_pages)
++ end_pfn = xen_start_info->nr_pages;
++#endif
++ bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
++ bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
++ PAGE_SIZE);
++ if (bootmap == -1L)
++ panic("Cannot find bootmem map of size %ld\n", bootmap_size);
++ /* don't touch min_low_pfn */
++ bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
++ 0, end_pfn);
++ free_bootmem_with_active_regions(0, end_pfn);
++ early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
++ reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
++}
++
+ void __init paging_init(void)
+ {
+ unsigned long max_zone_pfns[MAX_NR_ZONES];
+@@ -983,9 +1007,9 @@ void __init paging_init(void)
+ memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+ max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
+ max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
+- max_zone_pfns[ZONE_NORMAL] = end_pfn;
++ max_zone_pfns[ZONE_NORMAL] = max_pfn;
+
+- memory_present(0, 0, end_pfn);
++ memory_present(0, 0, max_pfn);
+ sparse_init();
+ free_area_init_nodes(max_zone_pfns);
+
+@@ -1076,8 +1100,8 @@ void __init mem_init(void)
+ init_page_count(pfn_to_page(pfn));
+ totalram_pages++;
+ }
+- reservedpages = end_pfn - totalram_pages -
+- absent_pages_in_range(0, end_pfn);
++ reservedpages = max_pfn - totalram_pages -
++ absent_pages_in_range(0, max_pfn);
+ after_bootmem = 1;
+
+ codesize = (unsigned long) &_etext - (unsigned long) &_text;
+@@ -1096,7 +1120,7 @@ void __init mem_init(void)
+ printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
+ "%ldk reserved, %ldk data, %ldk init)\n",
+ (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
+- end_pfn << (PAGE_SHIFT-10),
++ max_pfn << (PAGE_SHIFT-10),
+ codesize >> 10,
+ reservedpages << (PAGE_SHIFT-10),
+ datasize >> 10,
+@@ -1159,6 +1183,13 @@ EXPORT_SYMBOL_GPL(rodata_test_data);
+ void mark_rodata_ro(void)
+ {
+ unsigned long start = PFN_ALIGN(_stext), end = PFN_ALIGN(__end_rodata);
++ unsigned long rodata_start =
++ ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK;
++
++#ifdef CONFIG_DYNAMIC_FTRACE
++ /* Dynamic tracing modifies the kernel text section */
++ start = rodata_start;
++#endif
+
+ printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
+ (end - start) >> 10);
+@@ -1168,8 +1199,7 @@ void mark_rodata_ro(void)
+ * The rodata section (but not the kernel text!) should also be
+ * not-executable.
+ */
+- start = ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK;
+- set_memory_nx(start, (end - start) >> PAGE_SHIFT);
++ set_memory_nx(rodata_start, (end - rodata_start) >> PAGE_SHIFT);
+
+ rodata_test();
+
+@@ -1191,24 +1221,26 @@ void free_initrd_mem(unsigned long start
+ }
+ #endif
+
+-void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
++int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
++ int flags)
+ {
+ #ifdef CONFIG_NUMA
+ int nid, next_nid;
++ int ret;
+ #endif
+ unsigned long pfn = phys >> PAGE_SHIFT;
+
+- if (pfn >= end_pfn) {
++ if (pfn >= max_pfn) {
+ /*
+ * This can happen with kdump kernels when accessing
+ * firmware tables:
+ */
+ if (pfn < max_pfn_mapped)
+- return;
++ return -EFAULT;
+
+- printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %u\n",
++ printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %lu\n",
+ phys, len);
+- return;
++ return -EFAULT;
+ }
+
+ /* Should check here against the e820 map to avoid double free */
+@@ -1216,9 +1248,13 @@ void __init reserve_bootmem_generic(unsi
+ nid = phys_to_nid(phys);
+ next_nid = phys_to_nid(phys + len - 1);
+ if (nid == next_nid)
+- reserve_bootmem_node(NODE_DATA(nid), phys, len, BOOTMEM_DEFAULT);
++ ret = reserve_bootmem_node(NODE_DATA(nid), phys, len, flags);
+ else
+- reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
++ ret = reserve_bootmem(phys, len, flags);
++
++ if (ret != 0)
++ return ret;
++
+ #else
+ reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
+ #endif
+@@ -1231,6 +1267,8 @@ void __init reserve_bootmem_generic(unsi
+ set_dma_reserve(dma_reserve);
+ }
+ #endif
++
++ return 0;
+ }
+
+ int kern_addr_valid(unsigned long addr)
+@@ -1335,7 +1373,7 @@ vmemmap_populate(struct page *start_page
+ pmd_t *pmd;
+
+ for (; addr < end; addr = next) {
+- next = pmd_addr_end(addr, end);
++ void *p = NULL;
+
+ pgd = vmemmap_pgd_populate(addr, node);
+ if (!pgd)
+@@ -1345,33 +1383,51 @@ vmemmap_populate(struct page *start_page
+ if (!pud)
+ return -ENOMEM;
+
+- pmd = pmd_offset(pud, addr);
+- if (pmd_none(*pmd)) {
+- pte_t entry;
+- void *p;
++ if (!cpu_has_pse) {
++ next = (addr + PAGE_SIZE) & PAGE_MASK;
++ pmd = vmemmap_pmd_populate(pud, addr, node);
++
++ if (!pmd)
++ return -ENOMEM;
++
++ p = vmemmap_pte_populate(pmd, addr, node);
+
+- p = vmemmap_alloc_block(PMD_SIZE, node);
+ if (!p)
+ return -ENOMEM;
+
+- entry = pfn_pte(__pa(p) >> PAGE_SHIFT,
+- PAGE_KERNEL_LARGE);
+- set_pmd(pmd, __pmd_ma(__pte_val(entry)));
+-
+- /* check to see if we have contiguous blocks */
+- if (p_end != p || node_start != node) {
+- if (p_start)
+- printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n",
+- addr_start, addr_end-1, p_start, p_end-1, node_start);
+- addr_start = addr;
+- node_start = node;
+- p_start = p;
+- }
+- addr_end = addr + PMD_SIZE;
+- p_end = p + PMD_SIZE;
++ addr_end = addr + PAGE_SIZE;
++ p_end = p + PAGE_SIZE;
+ } else {
+- vmemmap_verify((pte_t *)pmd, node, addr, next);
++ next = pmd_addr_end(addr, end);
++
++ pmd = pmd_offset(pud, addr);
++ if (pmd_none(*pmd)) {
++ pte_t entry;
++
++ p = vmemmap_alloc_block(PMD_SIZE, node);
++ if (!p)
++ return -ENOMEM;
++
++ entry = pfn_pte(__pa(p) >> PAGE_SHIFT,
++ PAGE_KERNEL_LARGE);
++ set_pmd(pmd, __pmd_ma(__pte_val(entry)));
++
++ /* check to see if we have contiguous blocks */
++ if (p_end != p || node_start != node) {
++ if (p_start)
++ printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n",
++ addr_start, addr_end-1, p_start, p_end-1, node_start);
++ addr_start = addr;
++ node_start = node;
++ p_start = p;
++ }
++
++ addr_end = addr + PMD_SIZE;
++ p_end = p + PMD_SIZE;
++ } else
++ vmemmap_verify((pte_t *)pmd, node, addr, next);
+ }
++
+ }
+ return 0;
+ }
+Index: head-2008-12-01/arch/x86/mm/ioremap-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/ioremap-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/ioremap-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -13,6 +13,7 @@
+ #include <linux/pfn.h>
+ #include <linux/slab.h>
+ #include <linux/vmalloc.h>
++#include <linux/mmiotrace.h>
+
+ #include <asm/cacheflush.h>
+ #include <asm/e820.h>
+@@ -274,7 +275,8 @@ int ioremap_check_change_attr(unsigned l
+ for (sz = rc = 0; sz < size && !rc; ++mfn, sz += PAGE_SIZE) {
+ unsigned long pfn = mfn_to_local_pfn(mfn);
+
+- if (pfn >= max_pfn_mapped)
++ if (pfn >= max_low_pfn_mapped &&
++ (pfn < (1UL<<(32 - PAGE_SHIFT)) || pfn >= max_pfn_mapped))
+ continue;
+ rc = ioremap_change_attr((unsigned long)__va(pfn << PAGE_SHIFT),
+ PAGE_SIZE, prot_val);
+@@ -297,11 +299,14 @@ static void __iomem *__ioremap_caller(re
+ {
+ unsigned long mfn, offset, vaddr;
+ resource_size_t last_addr;
++ const resource_size_t unaligned_phys_addr = phys_addr;
++ const unsigned long unaligned_size = size;
+ struct vm_struct *area;
+ unsigned long new_prot_val;
+ pgprot_t prot;
+ int retval;
+ domid_t domid = DOMID_IO;
++ void __iomem *ret_addr;
+
+ /* Don't allow wraparound or zero size */
+ last_addr = phys_addr + size - 1;
+@@ -318,7 +323,7 @@ static void __iomem *__ioremap_caller(re
+ /*
+ * Don't remap the low PCI/ISA area, it's always mapped..
+ */
+- if (is_initial_xendomain() && last_addr < ISA_END_ADDRESS)
++ if (is_initial_xendomain() && is_ISA_range(phys_addr, last_addr))
+ return (__force void __iomem *)isa_bus_to_virt((unsigned long)phys_addr);
+
+ /*
+@@ -342,7 +347,7 @@ static void __iomem *__ioremap_caller(re
+ phys_addr &= PAGE_MASK;
+ size = PAGE_ALIGN(last_addr+1) - phys_addr;
+
+- retval = reserve_memtype(phys_addr, phys_addr + size,
++ retval = reserve_memtype(phys_addr, (u64)phys_addr + size,
+ prot_val, &new_prot_val);
+ if (retval) {
+ pr_debug("Warning: reserve_memtype returned %d\n", retval);
+@@ -410,7 +415,10 @@ static void __iomem *__ioremap_caller(re
+ return NULL;
+ }
+
+- return (void __iomem *) (vaddr + offset);
++ ret_addr = (void __iomem *) (vaddr + offset);
++ mmiotrace_ioremap(unaligned_phys_addr, unaligned_size, ret_addr);
++
++ return ret_addr;
+ }
+
+ /**
+@@ -438,7 +446,7 @@ void __iomem *ioremap_nocache(resource_s
+ {
+ /*
+ * Ideally, this should be:
+- * pat_wc_enabled ? _PAGE_CACHE_UC : _PAGE_CACHE_UC_MINUS;
++ * pat_enabled ? _PAGE_CACHE_UC : _PAGE_CACHE_UC_MINUS;
+ *
+ * Till we fix all X drivers to use ioremap_wc(), we will use
+ * UC MINUS.
+@@ -462,7 +470,7 @@ EXPORT_SYMBOL(ioremap_nocache);
+ */
+ void __iomem *ioremap_wc(unsigned long phys_addr, unsigned long size)
+ {
+- if (pat_wc_enabled)
++ if (pat_enabled)
+ return __ioremap_caller(phys_addr, size, _PAGE_CACHE_WC,
+ __builtin_return_address(0));
+ else
+@@ -502,6 +510,14 @@ static void __iomem *ioremap_default(res
+ }
+ #endif
+
++void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size,
++ unsigned long prot_val)
++{
++ return __ioremap_caller(phys_addr, size, (prot_val & _PAGE_CACHE_MASK),
++ __builtin_return_address(0));
++}
++EXPORT_SYMBOL(ioremap_prot);
++
+ /**
+ * iounmap - Free a IO remapping
+ * @addr: virtual address from ioremap_*
+@@ -526,6 +542,8 @@ void iounmap(volatile void __iomem *addr
+ addr = (volatile void __iomem *)
+ (PAGE_MASK & (unsigned long __force)addr);
+
++ mmiotrace_iounmap(addr);
++
+ /* Use the vm area unlocked, assuming the caller
+ ensures there isn't another iounmap for the same address
+ in parallel. Reuse of the virtual address is prevented by
+@@ -533,7 +551,7 @@ void iounmap(volatile void __iomem *addr
+ cpa takes care of the direct mappings. */
+ read_lock(&vmlist_lock);
+ for (p = vmlist; p; p = p->next) {
+- if (p->addr == addr)
++ if (p->addr == (void __force *)addr)
+ break;
+ }
+ read_unlock(&vmlist_lock);
+@@ -547,7 +565,7 @@ void iounmap(volatile void __iomem *addr
+ free_memtype(p->phys_addr, p->phys_addr + get_vm_area_size(p));
+
+ /* Finally remove it */
+- o = remove_vm_area((void *)addr);
++ o = remove_vm_area((void __force *)addr);
+ BUG_ON(p != o || o == NULL);
+ kfree(p);
+ }
+@@ -567,7 +585,7 @@ void *xlate_dev_mem_ptr(unsigned long ph
+ if (page_is_ram(start >> PAGE_SHIFT))
+ return __va(phys);
+
+- addr = (void *)ioremap_default(start, PAGE_SIZE);
++ addr = (void __force *)ioremap_default(start, PAGE_SIZE);
+ if (addr)
+ addr = (void *)((unsigned long)addr | (phys & ~PAGE_MASK));
+
+@@ -595,8 +613,7 @@ static int __init early_ioremap_debug_se
+ early_param("early_ioremap_debug", early_ioremap_debug_setup);
+
+ static __initdata int after_paging_init;
+-static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)]
+- __section(.bss.page_aligned);
++static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] __page_aligned_bss;
+
+ #ifdef CONFIG_X86_32
+ static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
+@@ -693,10 +710,11 @@ static void __init __early_set_fixmap(en
+ return;
+ }
+ pte = early_ioremap_pte(addr);
++
+ if (pgprot_val(flags))
+ set_pte(pte, pfn_pte_ma(phys >> PAGE_SHIFT, flags));
+ else
+- pte_clear(NULL, addr, pte);
++ pte_clear(&init_mm, addr, pte);
+ __flush_tlb_one(addr);
+ }
+
+@@ -724,13 +742,11 @@ static int __init check_early_ioremap_le
+ {
+ if (!early_ioremap_nested)
+ return 0;
+-
+- printk(KERN_WARNING
++ WARN(1, KERN_WARNING
+ "Debug warning: early ioremap leak of %d areas detected.\n",
+- early_ioremap_nested);
++ early_ioremap_nested);
+ printk(KERN_WARNING
+- "please boot with early_ioremap_debug and report the dmesg.\n");
+- WARN_ON(1);
++ "please boot with early_ioremap_debug and report the dmesg.\n");
+
+ return 1;
+ }
+Index: head-2008-12-01/arch/x86/mm/pageattr-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pageattr-xen.c 2008-12-01 12:19:27.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pageattr-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -34,6 +34,47 @@ struct cpa_data {
+ unsigned force_split : 1;
+ };
+
++#ifdef CONFIG_PROC_FS
++static unsigned long direct_pages_count[PG_LEVEL_NUM];
++
++void update_page_count(int level, unsigned long pages)
++{
++ unsigned long flags;
++
++ /* Protect against CPA */
++ spin_lock_irqsave(&pgd_lock, flags);
++ direct_pages_count[level] += pages;
++ spin_unlock_irqrestore(&pgd_lock, flags);
++}
++
++static void split_page_count(int level)
++{
++ direct_pages_count[level]--;
++ direct_pages_count[level - 1] += PTRS_PER_PTE;
++}
++
++int arch_report_meminfo(char *page)
++{
++ int n = sprintf(page, "DirectMap4k: %8lu kB\n",
++ direct_pages_count[PG_LEVEL_4K] << 2);
++#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
++ n += sprintf(page + n, "DirectMap2M: %8lu kB\n",
++ direct_pages_count[PG_LEVEL_2M] << 11);
++#else
++ n += sprintf(page + n, "DirectMap4M: %8lu kB\n",
++ direct_pages_count[PG_LEVEL_2M] << 12);
++#endif
++#ifdef CONFIG_X86_64
++ if (direct_gbpages)
++ n += sprintf(page + n, "DirectMap1G: %8lu kB\n",
++ direct_pages_count[PG_LEVEL_1G] << 20);
++#endif
++ return n;
++}
++#else
++static inline void split_page_count(int level) { }
++#endif
++
+ #ifdef CONFIG_X86_64
+
+ static inline unsigned long highmap_start_pfn(void)
+@@ -106,7 +147,7 @@ static void cpa_flush_all(unsigned long
+ {
+ BUG_ON(irqs_disabled());
+
+- on_each_cpu(__cpa_flush_all, (void *) cache, 1, 1);
++ on_each_cpu(__cpa_flush_all, (void *) cache, 1);
+ }
+
+ static void __cpa_flush_range(void *arg)
+@@ -127,7 +168,7 @@ static void cpa_flush_range(unsigned lon
+ BUG_ON(irqs_disabled());
+ WARN_ON(PAGE_ALIGN(start) != start);
+
+- on_each_cpu(__cpa_flush_range, NULL, 1, 1);
++ on_each_cpu(__cpa_flush_range, NULL, 1);
+
+ if (!cache)
+ return;
+@@ -229,6 +270,7 @@ pte_t *lookup_address(unsigned long addr
+
+ return pte_offset_kernel(pmd, address);
+ }
++EXPORT_SYMBOL_GPL(lookup_address);
+
+ /*
+ * Set the new pmd in all the pgds we know about:
+@@ -509,6 +551,16 @@ static int split_large_page(pte_t *kpte,
+ }
+ #endif
+
++ if (address >= (unsigned long)__va(0) &&
++ address < (unsigned long)__va(max_low_pfn_mapped << PAGE_SHIFT))
++ split_page_count(level);
++
++#ifdef CONFIG_X86_64
++ if (address >= (unsigned long)__va(1UL<<32) &&
++ address < (unsigned long)__va(max_pfn_mapped << PAGE_SHIFT))
++ split_page_count(level);
++#endif
++
+ /*
+ * Get the target mfn from the original entry:
+ */
+@@ -565,10 +617,9 @@ repeat:
+ if (!__pte_val(old_pte)) {
+ if (!primary)
+ return 0;
+- printk(KERN_WARNING "CPA: called for zero pte. "
++ WARN(1, KERN_WARNING "CPA: called for zero pte. "
+ "vaddr = %lx cpa->vaddr = %lx\n", address,
+ cpa->vaddr);
+- WARN_ON(1);
+ return -EINVAL;
+ }
+
+@@ -633,15 +684,24 @@ static int cpa_process_alias(struct cpa_
+ struct cpa_data alias_cpa;
+ int ret = 0;
+
+- if (cpa->pfn > max_pfn_mapped)
++ if (cpa->pfn >= max_pfn_mapped)
+ return 0;
+
++#ifdef CONFIG_X86_64
++ if (cpa->pfn >= max_low_pfn_mapped && cpa->pfn < (1UL<<(32-PAGE_SHIFT)))
++ return 0;
++#endif
+ /*
+ * No need to redo, when the primary call touched the direct
+ * mapping already:
+ */
+- if (!within(cpa->vaddr, PAGE_OFFSET,
+- PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT))) {
++ if (!(within(cpa->vaddr, PAGE_OFFSET,
++ PAGE_OFFSET + (max_low_pfn_mapped << PAGE_SHIFT))
++#ifdef CONFIG_X86_64
++ || within(cpa->vaddr, PAGE_OFFSET + (1UL<<32),
++ PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT))
++#endif
++ )) {
+
+ alias_cpa = *cpa;
+ alias_cpa.vaddr = (unsigned long) __va(cpa->pfn << PAGE_SHIFT);
+@@ -809,7 +869,7 @@ int set_memory_uc(unsigned long addr, in
+ /*
+ * for now UC MINUS. see comments in ioremap_nocache()
+ */
+- if (reserve_memtype(addr, addr + numpages * PAGE_SIZE,
++ if (reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE,
+ _PAGE_CACHE_UC_MINUS, NULL))
+ return -EINVAL;
+
+@@ -825,10 +885,10 @@ int _set_memory_wc(unsigned long addr, i
+
+ int set_memory_wc(unsigned long addr, int numpages)
+ {
+- if (!pat_wc_enabled)
++ if (!pat_enabled)
+ return set_memory_uc(addr, numpages);
+
+- if (reserve_memtype(addr, addr + numpages * PAGE_SIZE,
++ if (reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE,
+ _PAGE_CACHE_WC, NULL))
+ return -EINVAL;
+
+@@ -844,7 +904,7 @@ int _set_memory_wb(unsigned long addr, i
+
+ int set_memory_wb(unsigned long addr, int numpages)
+ {
+- free_memtype(addr, addr + numpages * PAGE_SIZE);
++ free_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE);
+
+ return _set_memory_wb(addr, numpages);
+ }
+Index: head-2008-12-01/arch/x86/mm/pat-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pat-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pat-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -12,6 +12,8 @@
+ #include <linux/gfp.h>
+ #include <linux/fs.h>
+ #include <linux/bootmem.h>
++#include <linux/debugfs.h>
++#include <linux/seq_file.h>
+
+ #include <asm/msr.h>
+ #include <asm/tlbflush.h>
+@@ -26,11 +28,11 @@
+ #include <asm/io.h>
+
+ #ifdef CONFIG_X86_PAT
+-int __read_mostly pat_wc_enabled = 1;
++int __read_mostly pat_enabled = 1;
+
+ void __cpuinit pat_disable(char *reason)
+ {
+- pat_wc_enabled = 0;
++ pat_enabled = 0;
+ printk(KERN_INFO "%s\n", reason);
+ }
+
+@@ -42,6 +44,19 @@ static int __init nopat(char *str)
+ early_param("nopat", nopat);
+ #endif
+
++
++static int debug_enable;
++static int __init pat_debug_setup(char *str)
++{
++ debug_enable = 1;
++ return 0;
++}
++__setup("debugpat", pat_debug_setup);
++
++#define dprintk(fmt, arg...) \
++ do { if (debug_enable) printk(KERN_INFO fmt, ##arg); } while (0)
++
++
+ static u64 __read_mostly boot_pat_state;
+
+ enum {
+@@ -53,24 +68,25 @@ enum {
+ PAT_UC_MINUS = 7, /* UC, but can be overriden by MTRR */
+ };
+
+-#define PAT(x,y) ((u64)PAT_ ## y << ((x)*8))
++#define PAT(x, y) ((u64)PAT_ ## y << ((x)*8))
+
+ void pat_init(void)
+ {
+ u64 pat;
+
+- if (!pat_wc_enabled)
++ if (!pat_enabled)
+ return;
+
+ /* Paranoia check. */
+- if (!cpu_has_pat) {
+- printk(KERN_ERR "PAT enabled, but CPU feature cleared\n");
++ if (!cpu_has_pat && boot_pat_state) {
+ /*
+- * Panic if this happens on the secondary CPU, and we
++ * If this happens we are on a secondary CPU, but
+ * switched to PAT on the boot CPU. We have no way to
+ * undo PAT.
+- */
+- BUG_ON(boot_pat_state);
++ */
++ printk(KERN_ERR "PAT enabled, "
++ "but not supported by secondary CPU\n");
++ BUG();
+ }
+
+ #ifndef CONFIG_XEN
+@@ -87,8 +103,8 @@ void pat_init(void)
+ * 011 UC _PAGE_CACHE_UC
+ * PAT bit unused
+ */
+- pat = PAT(0,WB) | PAT(1,WC) | PAT(2,UC_MINUS) | PAT(3,UC) |
+- PAT(4,WB) | PAT(5,WC) | PAT(6,UC_MINUS) | PAT(7,UC);
++ pat = PAT(0, WB) | PAT(1, WC) | PAT(2, UC_MINUS) | PAT(3, UC) |
++ PAT(4, WB) | PAT(5, WC) | PAT(6, UC_MINUS) | PAT(7, UC);
+
+ /* Boot CPU check */
+ if (!boot_pat_state)
+@@ -113,13 +129,13 @@ void pat_init(void)
+ static char *cattr_name(unsigned long flags)
+ {
+ switch (flags & _PAGE_CACHE_MASK) {
+- case _PAGE_CACHE_UC: return "uncached";
+- case _PAGE_CACHE_UC_MINUS: return "uncached-minus";
+- case _PAGE_CACHE_WB: return "write-back";
+- case _PAGE_CACHE_WC: return "write-combining";
+- case _PAGE_CACHE_WP: return "write-protected";
+- case _PAGE_CACHE_WT: return "write-through";
+- default: return "broken";
++ case _PAGE_CACHE_UC: return "uncached";
++ case _PAGE_CACHE_UC_MINUS: return "uncached-minus";
++ case _PAGE_CACHE_WB: return "write-back";
++ case _PAGE_CACHE_WC: return "write-combining";
++ case _PAGE_CACHE_WP: return "write-protected";
++ case _PAGE_CACHE_WT: return "write-through";
++ default: return "broken";
+ }
+ }
+
+@@ -157,49 +173,55 @@ static DEFINE_SPINLOCK(memtype_lock); /
+ * The intersection is based on "Effective Memory Type" tables in IA-32
+ * SDM vol 3a
+ */
+-static int pat_x_mtrr_type(u64 start, u64 end, unsigned long prot,
+- unsigned long *ret_prot)
++static unsigned long pat_x_mtrr_type(u64 start, u64 end, unsigned long req_type)
+ {
+- unsigned long pat_type;
+- u8 mtrr_type;
+-
+- pat_type = prot & _PAGE_CACHE_MASK;
+- prot &= (~_PAGE_CACHE_MASK);
+-
+- /*
+- * We return the PAT request directly for types where PAT takes
+- * precedence with respect to MTRR and for UC_MINUS.
+- * Consistency checks with other PAT requests is done later
+- * while going through memtype list.
+- */
+- if (pat_type == _PAGE_CACHE_WC) {
+- *ret_prot = prot | _PAGE_CACHE_WC;
+- return 0;
+- } else if (pat_type == _PAGE_CACHE_UC_MINUS) {
+- *ret_prot = prot | _PAGE_CACHE_UC_MINUS;
+- return 0;
+- } else if (pat_type == _PAGE_CACHE_UC) {
+- *ret_prot = prot | _PAGE_CACHE_UC;
+- return 0;
+- }
+-
+ /*
+ * Look for MTRR hint to get the effective type in case where PAT
+ * request is for WB.
+ */
+- mtrr_type = mtrr_type_lookup(start, end);
++ if (req_type == _PAGE_CACHE_WB) {
++ u8 mtrr_type;
+
+- if (mtrr_type == MTRR_TYPE_UNCACHABLE) {
+- *ret_prot = prot | _PAGE_CACHE_UC;
+- } else if (mtrr_type == MTRR_TYPE_WRCOMB) {
+- *ret_prot = prot | _PAGE_CACHE_WC;
+- } else {
+- *ret_prot = prot | _PAGE_CACHE_WB;
++ mtrr_type = mtrr_type_lookup(start, end);
++ if (mtrr_type == MTRR_TYPE_UNCACHABLE)
++ return _PAGE_CACHE_UC;
++ if (mtrr_type == MTRR_TYPE_WRCOMB)
++ return _PAGE_CACHE_WC;
++ }
++
++ return req_type;
++}
++
++static int chk_conflict(struct memtype *new, struct memtype *entry,
++ unsigned long *type)
++{
++ if (new->type != entry->type) {
++ if (type) {
++ new->type = entry->type;
++ *type = entry->type;
++ } else
++ goto conflict;
+ }
+
++ /* check overlaps with more than one entry in the list */
++ list_for_each_entry_continue(entry, &memtype_list, nd) {
++ if (new->end <= entry->start)
++ break;
++ else if (new->type != entry->type)
++ goto conflict;
++ }
+ return 0;
++
++ conflict:
++ printk(KERN_INFO "%s:%d conflicting memory types "
++ "%Lx-%Lx %s<->%s\n", current->comm, current->pid, new->start,
++ new->end, cattr_name(new->type), cattr_name(entry->type));
++ return -EBUSY;
+ }
+
++static struct memtype *cached_entry;
++static u64 cached_start;
++
+ /*
+ * req_type typically has one of the:
+ * - _PAGE_CACHE_WB
+@@ -210,37 +232,36 @@ static int pat_x_mtrr_type(u64 start, u6
+ * req_type will have a special case value '-1', when requester want to inherit
+ * the memory type from mtrr (if WB), existing PAT, defaulting to UC_MINUS.
+ *
+- * If ret_type is NULL, function will return an error if it cannot reserve the
+- * region with req_type. If ret_type is non-null, function will return
+- * available type in ret_type in case of no error. In case of any error
++ * If new_type is NULL, function will return an error if it cannot reserve the
++ * region with req_type. If new_type is non-NULL, function will return
++ * available type in new_type in case of no error. In case of any error
+ * it will return a negative return value.
+ */
+ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
+- unsigned long *ret_type)
++ unsigned long *new_type)
+ {
+- struct memtype *new_entry = NULL;
+- struct memtype *parse;
++ struct memtype *new, *entry;
+ unsigned long actual_type;
++ struct list_head *where;
+ int err = 0;
+
+- /* Only track when pat_wc_enabled */
+- if (!pat_wc_enabled) {
++ BUG_ON(start >= end); /* end is exclusive */
++
++ if (!pat_enabled) {
+ /* This is identical to page table setting without PAT */
+- if (ret_type) {
+- if (req_type == -1) {
+- *ret_type = _PAGE_CACHE_WB;
+- } else {
+- *ret_type = req_type;
+- }
++ if (new_type) {
++ if (req_type == -1)
++ *new_type = _PAGE_CACHE_WB;
++ else
++ *new_type = req_type & _PAGE_CACHE_MASK;
+ }
+ return 0;
+ }
+
+ /* Low ISA region is always mapped WB in page table. No need to track */
+- if (start >= ISA_START_ADDRESS && (end - 1) <= ISA_END_ADDRESS) {
+- if (ret_type)
+- *ret_type = _PAGE_CACHE_WB;
+-
++ if (is_ISA_range(start, end - 1)) {
++ if (new_type)
++ *new_type = _PAGE_CACHE_WB;
+ return 0;
+ }
+
+@@ -253,206 +274,118 @@ int reserve_memtype(u64 start, u64 end,
+ */
+ u8 mtrr_type = mtrr_type_lookup(start, end);
+
+- if (mtrr_type == MTRR_TYPE_WRBACK) {
+- req_type = _PAGE_CACHE_WB;
++ if (mtrr_type == MTRR_TYPE_WRBACK)
+ actual_type = _PAGE_CACHE_WB;
+- } else {
+- req_type = _PAGE_CACHE_UC_MINUS;
++ else
+ actual_type = _PAGE_CACHE_UC_MINUS;
+- }
+- } else {
+- req_type &= _PAGE_CACHE_MASK;
+- err = pat_x_mtrr_type(start, end, req_type, &actual_type);
+- }
+-
+- if (err) {
+- if (ret_type)
+- *ret_type = actual_type;
++ } else
++ actual_type = pat_x_mtrr_type(start, end,
++ req_type & _PAGE_CACHE_MASK);
+
+- return -EINVAL;
+- }
+-
+- new_entry = kmalloc(sizeof(struct memtype), GFP_KERNEL);
+- if (!new_entry)
++ new = kmalloc(sizeof(struct memtype), GFP_KERNEL);
++ if (!new)
+ return -ENOMEM;
+
+- new_entry->start = start;
+- new_entry->end = end;
+- new_entry->type = actual_type;
++ new->start = start;
++ new->end = end;
++ new->type = actual_type;
+
+- if (ret_type)
+- *ret_type = actual_type;
++ if (new_type)
++ *new_type = actual_type;
+
+ spin_lock(&memtype_lock);
+
+- /* Search for existing mapping that overlaps the current range */
+- list_for_each_entry(parse, &memtype_list, nd) {
+- struct memtype *saved_ptr;
++ if (cached_entry && start >= cached_start)
++ entry = cached_entry;
++ else
++ entry = list_entry(&memtype_list, struct memtype, nd);
+
+- if (parse->start >= end) {
+- pr_debug("New Entry\n");
+- list_add(&new_entry->nd, parse->nd.prev);
+- new_entry = NULL;
++ /* Search for existing mapping that overlaps the current range */
++ where = NULL;
++ list_for_each_entry_continue(entry, &memtype_list, nd) {
++ if (end <= entry->start) {
++ where = entry->nd.prev;
++ cached_entry = list_entry(where, struct memtype, nd);
+ break;
+- }
+-
+- if (start <= parse->start && end >= parse->start) {
+- if (actual_type != parse->type && ret_type) {
+- actual_type = parse->type;
+- *ret_type = actual_type;
+- new_entry->type = actual_type;
+- }
+-
+- if (actual_type != parse->type) {
+- printk(
+- KERN_INFO "%s:%d conflicting memory types %Lx-%Lx %s<->%s\n",
+- current->comm, current->pid,
+- start, end,
+- cattr_name(actual_type),
+- cattr_name(parse->type));
+- err = -EBUSY;
+- break;
+- }
+-
+- saved_ptr = parse;
+- /*
+- * Check to see whether the request overlaps more
+- * than one entry in the list
+- */
+- list_for_each_entry_continue(parse, &memtype_list, nd) {
+- if (end <= parse->start) {
+- break;
+- }
+-
+- if (actual_type != parse->type) {
+- printk(
+- KERN_INFO "%s:%d conflicting memory types %Lx-%Lx %s<->%s\n",
+- current->comm, current->pid,
+- start, end,
+- cattr_name(actual_type),
+- cattr_name(parse->type));
+- err = -EBUSY;
+- break;
+- }
+- }
+-
+- if (err) {
+- break;
++ } else if (start <= entry->start) { /* end > entry->start */
++ err = chk_conflict(new, entry, new_type);
++ if (!err) {
++ dprintk("Overlap at 0x%Lx-0x%Lx\n",
++ entry->start, entry->end);
++ where = entry->nd.prev;
++ cached_entry = list_entry(where,
++ struct memtype, nd);
+ }
+-
+- pr_debug("Overlap at 0x%Lx-0x%Lx\n",
+- saved_ptr->start, saved_ptr->end);
+- /* No conflict. Go ahead and add this new entry */
+- list_add(&new_entry->nd, saved_ptr->nd.prev);
+- new_entry = NULL;
+ break;
+- }
+-
+- if (start < parse->end) {
+- if (actual_type != parse->type && ret_type) {
+- actual_type = parse->type;
+- *ret_type = actual_type;
+- new_entry->type = actual_type;
+- }
+-
+- if (actual_type != parse->type) {
+- printk(
+- KERN_INFO "%s:%d conflicting memory types %Lx-%Lx %s<->%s\n",
+- current->comm, current->pid,
+- start, end,
+- cattr_name(actual_type),
+- cattr_name(parse->type));
+- err = -EBUSY;
+- break;
+- }
+-
+- saved_ptr = parse;
+- /*
+- * Check to see whether the request overlaps more
+- * than one entry in the list
+- */
+- list_for_each_entry_continue(parse, &memtype_list, nd) {
+- if (end <= parse->start) {
+- break;
+- }
+-
+- if (actual_type != parse->type) {
+- printk(
+- KERN_INFO "%s:%d conflicting memory types %Lx-%Lx %s<->%s\n",
+- current->comm, current->pid,
+- start, end,
+- cattr_name(actual_type),
+- cattr_name(parse->type));
+- err = -EBUSY;
+- break;
++ } else if (start < entry->end) { /* start > entry->start */
++ err = chk_conflict(new, entry, new_type);
++ if (!err) {
++ dprintk("Overlap at 0x%Lx-0x%Lx\n",
++ entry->start, entry->end);
++ cached_entry = list_entry(entry->nd.prev,
++ struct memtype, nd);
++
++ /*
++ * Move to right position in the linked
++ * list to add this new entry
++ */
++ list_for_each_entry_continue(entry,
++ &memtype_list, nd) {
++ if (start <= entry->start) {
++ where = entry->nd.prev;
++ break;
++ }
+ }
+ }
+-
+- if (err) {
+- break;
+- }
+-
+- pr_debug(KERN_INFO "Overlap at 0x%Lx-0x%Lx\n",
+- saved_ptr->start, saved_ptr->end);
+- /* No conflict. Go ahead and add this new entry */
+- list_add(&new_entry->nd, &saved_ptr->nd);
+- new_entry = NULL;
+ break;
+ }
+ }
+
+ if (err) {
+- printk(KERN_INFO
+- "reserve_memtype failed 0x%Lx-0x%Lx, track %s, req %s\n",
+- start, end, cattr_name(new_entry->type),
+- cattr_name(req_type));
+- kfree(new_entry);
++ printk(KERN_INFO "reserve_memtype failed 0x%Lx-0x%Lx, "
++ "track %s, req %s\n",
++ start, end, cattr_name(new->type), cattr_name(req_type));
++ kfree(new);
+ spin_unlock(&memtype_lock);
+ return err;
+ }
+
+- if (new_entry) {
+- /* No conflict. Not yet added to the list. Add to the tail */
+- list_add_tail(&new_entry->nd, &memtype_list);
+- pr_debug("New Entry\n");
+- }
++ cached_start = start;
+
+- if (ret_type) {
+- pr_debug(
+- "reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s, ret %s\n",
+- start, end, cattr_name(actual_type),
+- cattr_name(req_type), cattr_name(*ret_type));
+- } else {
+- pr_debug(
+- "reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s\n",
+- start, end, cattr_name(actual_type),
+- cattr_name(req_type));
+- }
++ if (where)
++ list_add(&new->nd, where);
++ else
++ list_add_tail(&new->nd, &memtype_list);
+
+ spin_unlock(&memtype_lock);
++
++ dprintk("reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s, ret %s\n",
++ start, end, cattr_name(new->type), cattr_name(req_type),
++ new_type ? cattr_name(*new_type) : "-");
++
+ return err;
+ }
+
+ int free_memtype(u64 start, u64 end)
+ {
+- struct memtype *ml;
++ struct memtype *entry;
+ int err = -EINVAL;
+
+- /* Only track when pat_wc_enabled */
+- if (!pat_wc_enabled) {
++ if (!pat_enabled)
+ return 0;
+- }
+
+ /* Low ISA region is always mapped WB. No need to track */
+- if (start >= ISA_START_ADDRESS && end <= ISA_END_ADDRESS) {
++ if (is_ISA_range(start, end - 1))
+ return 0;
+- }
+
+ spin_lock(&memtype_lock);
+- list_for_each_entry(ml, &memtype_list, nd) {
+- if (ml->start == start && ml->end == end) {
+- list_del(&ml->nd);
+- kfree(ml);
++ list_for_each_entry(entry, &memtype_list, nd) {
++ if (entry->start == start && entry->end == end) {
++ if (cached_entry == entry || cached_start == start)
++ cached_entry = NULL;
++
++ list_del(&entry->nd);
++ kfree(entry);
+ err = 0;
+ break;
+ }
+@@ -464,27 +397,19 @@ int free_memtype(u64 start, u64 end)
+ current->comm, current->pid, start, end);
+ }
+
+- pr_debug("free_memtype request 0x%Lx-0x%Lx\n", start, end);
++ dprintk("free_memtype request 0x%Lx-0x%Lx\n", start, end);
+ return err;
+ }
+
+
+-/*
+- * /dev/mem mmap interface. The memtype used for mapping varies:
+- * - Use UC for mappings with O_SYNC flag
+- * - Without O_SYNC flag, if there is any conflict in reserve_memtype,
+- * inherit the memtype from existing mapping.
+- * - Else use UC_MINUS memtype (for backward compatibility with existing
+- * X drivers.
+- */
+ pgprot_t phys_mem_access_prot(struct file *file, unsigned long mfn,
+ unsigned long size, pgprot_t vma_prot)
+ {
+ return vma_prot;
+ }
+
+-#ifdef CONFIG_NONPROMISC_DEVMEM
+-/* This check is done in drivers/char/mem.c in case of NONPROMISC_DEVMEM*/
++#ifdef CONFIG_STRICT_DEVMEM
++/* This check is done in drivers/char/mem.c in case of STRICT_DEVMEM*/
+ static inline int range_is_allowed(unsigned long mfn, unsigned long size)
+ {
+ return 1;
+@@ -508,20 +433,20 @@ static inline int range_is_allowed(unsig
+ }
+ return 1;
+ }
+-#endif /* CONFIG_NONPROMISC_DEVMEM */
++#endif /* CONFIG_STRICT_DEVMEM */
+
+ int phys_mem_access_prot_allowed(struct file *file, unsigned long mfn,
+ unsigned long size, pgprot_t *vma_prot)
+ {
+ u64 addr = (u64)mfn << PAGE_SHIFT;
+- unsigned long flags = _PAGE_CACHE_UC_MINUS;
++ unsigned long flags = -1;
+ int retval;
+
+ if (!range_is_allowed(mfn, size))
+ return 0;
+
+ if (file->f_flags & O_SYNC) {
+- flags = _PAGE_CACHE_UC;
++ flags = _PAGE_CACHE_UC_MINUS;
+ }
+
+ #ifndef CONFIG_X86_32
+@@ -534,25 +459,26 @@ int phys_mem_access_prot_allowed(struct
+ * caching for the high addresses through the KEN pin, but
+ * we maintain the tradition of paranoia in this code.
+ */
+- if (!pat_wc_enabled &&
+- ! ( test_bit(X86_FEATURE_MTRR, boot_cpu_data.x86_capability) ||
+- test_bit(X86_FEATURE_K6_MTRR, boot_cpu_data.x86_capability) ||
+- test_bit(X86_FEATURE_CYRIX_ARR, boot_cpu_data.x86_capability) ||
+- test_bit(X86_FEATURE_CENTAUR_MCR, boot_cpu_data.x86_capability)) &&
+- (pfn << PAGE_SHIFT) >= __pa(high_memory)) {
++ if (!pat_enabled &&
++ !(boot_cpu_has(X86_FEATURE_MTRR) ||
++ boot_cpu_has(X86_FEATURE_K6_MTRR) ||
++ boot_cpu_has(X86_FEATURE_CYRIX_ARR) ||
++ boot_cpu_has(X86_FEATURE_CENTAUR_MCR)) &&
++ (pfn << PAGE_SHIFT) >= __pa(high_memory)) {
+ flags = _PAGE_CACHE_UC;
+ }
+ #endif
+ #endif
+
+ /*
+- * With O_SYNC, we can only take UC mapping. Fail if we cannot.
++ * With O_SYNC, we can only take UC_MINUS mapping. Fail if we cannot.
++ *
+ * Without O_SYNC, we want to get
+ * - WB for WB-able memory and no other conflicting mappings
+ * - UC_MINUS for non-WB-able memory with no other conflicting mappings
+ * - Inherit from confliting mappings otherwise
+ */
+- if (flags != _PAGE_CACHE_UC_MINUS) {
++ if (flags != -1) {
+ retval = reserve_memtype(addr, addr + size, flags, NULL);
+ } else {
+ retval = reserve_memtype(addr, addr + size, -1, &flags);
+@@ -600,3 +526,88 @@ void unmap_devmem(unsigned long mfn, uns
+ free_memtype(addr, addr + size);
+ }
+
++#if defined(CONFIG_DEBUG_FS)
++
++/* get Nth element of the linked list */
++static struct memtype *memtype_get_idx(loff_t pos)
++{
++ struct memtype *list_node, *print_entry;
++ int i = 1;
++
++ print_entry = kmalloc(sizeof(struct memtype), GFP_KERNEL);
++ if (!print_entry)
++ return NULL;
++
++ spin_lock(&memtype_lock);
++ list_for_each_entry(list_node, &memtype_list, nd) {
++ if (pos == i) {
++ *print_entry = *list_node;
++ spin_unlock(&memtype_lock);
++ return print_entry;
++ }
++ ++i;
++ }
++ spin_unlock(&memtype_lock);
++ kfree(print_entry);
++ return NULL;
++}
++
++static void *memtype_seq_start(struct seq_file *seq, loff_t *pos)
++{
++ if (*pos == 0) {
++ ++*pos;
++ seq_printf(seq, "PAT memtype list:\n");
++ }
++
++ return memtype_get_idx(*pos);
++}
++
++static void *memtype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
++{
++ ++*pos;
++ return memtype_get_idx(*pos);
++}
++
++static void memtype_seq_stop(struct seq_file *seq, void *v)
++{
++}
++
++static int memtype_seq_show(struct seq_file *seq, void *v)
++{
++ struct memtype *print_entry = (struct memtype *)v;
++
++ seq_printf(seq, "%s @ 0x%Lx-0x%Lx\n", cattr_name(print_entry->type),
++ print_entry->start, print_entry->end);
++ kfree(print_entry);
++ return 0;
++}
++
++static struct seq_operations memtype_seq_ops = {
++ .start = memtype_seq_start,
++ .next = memtype_seq_next,
++ .stop = memtype_seq_stop,
++ .show = memtype_seq_show,
++};
++
++static int memtype_seq_open(struct inode *inode, struct file *file)
++{
++ return seq_open(file, &memtype_seq_ops);
++}
++
++static const struct file_operations memtype_fops = {
++ .open = memtype_seq_open,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = seq_release,
++};
++
++static int __init pat_memtype_list_init(void)
++{
++ debugfs_create_file("pat_memtype_list", S_IRUSR, arch_debugfs_dir,
++ NULL, &memtype_fops);
++ return 0;
++}
++
++late_initcall(pat_memtype_list_init);
++
++#endif /* CONFIG_DEBUG_FS */
+Index: head-2008-12-01/arch/x86/mm/pgtable-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable-xen.c 2008-12-01 11:46:22.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -4,6 +4,7 @@
+ #include <asm/pgalloc.h>
+ #include <asm/pgtable.h>
+ #include <asm/tlb.h>
++#include <asm/fixmap.h>
+ #include <asm/hypervisor.h>
+ #include <asm/mmu_context.h>
+
+@@ -410,15 +411,9 @@ static inline void pgd_list_del(pgd_t *p
+ static void pgd_ctor(void *p)
+ {
+ pgd_t *pgd = p;
+- unsigned long flags;
+
+ pgd_test_and_unpin(pgd);
+
+- /* Clear usermode parts of PGD */
+- memset(pgd, 0, KERNEL_PGD_BOUNDARY*sizeof(pgd_t));
+-
+- spin_lock_irqsave(&pgd_lock, flags);
+-
+ /* If the pgd points to a shared pagetable level (either the
+ ptes in non-PAE, or shared PMD in PAE), then just copy the
+ references from swapper_pg_dir. */
+@@ -440,13 +435,9 @@ static void pgd_ctor(void *p)
+ __pgd(__pa_symbol(level3_user_pgt) | _PAGE_TABLE);
+ #endif
+
+-#ifndef CONFIG_X86_PAE
+ /* list required to sync kernel mapping updates */
+ if (!SHARED_KERNEL_PMD)
+ pgd_list_add(pgd);
+-#endif
+-
+- spin_unlock_irqrestore(&pgd_lock, flags);
+ }
+
+ static void pgd_dtor(void *pgd)
+@@ -475,33 +466,6 @@ static void pgd_dtor(void *pgd)
+
+ #ifdef CONFIG_X86_PAE
+ /*
+- * Mop up any pmd pages which may still be attached to the pgd.
+- * Normally they will be freed by munmap/exit_mmap, but any pmd we
+- * preallocate which never got a corresponding vma will need to be
+- * freed manually.
+- */
+-static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
+-{
+- int i;
+-
+- for(i = 0; i < UNSHARED_PTRS_PER_PGD; i++) {
+- pgd_t pgd = pgdp[i];
+-
+- if (__pgd_val(pgd) != 0) {
+- pmd_t *pmd = (pmd_t *)pgd_page_vaddr(pgd);
+-
+- pgdp[i] = xen_make_pgd(0);
+-
+- paravirt_release_pmd(pgd_val(pgd) >> PAGE_SHIFT);
+- pmd_free(mm, pmd);
+- }
+- }
+-
+- if (!xen_feature(XENFEAT_pae_pgdir_above_4gb))
+- xen_destroy_contiguous_region((unsigned long)pgdp, 0);
+-}
+-
+-/*
+ * In PAE mode, we need to do a cr3 reload (=tlb flush) when
+ * updating the top-level pagetable entries to guarantee the
+ * processor notices the update. Since this is expensive, and
+@@ -512,61 +476,7 @@ static void pgd_mop_up_pmds(struct mm_st
+ * not shared between pagetables (!SHARED_KERNEL_PMDS), we allocate
+ * and initialize the kernel pmds here.
+ */
+-static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
+-{
+- pud_t *pud;
+- pmd_t *pmds[UNSHARED_PTRS_PER_PGD];
+- unsigned long addr, flags;
+- int i;
+-
+- /*
+- * We can race save/restore (if we sleep during a GFP_KERNEL memory
+- * allocation). We therefore store virtual addresses of pmds as they
+- * do not change across save/restore, and poke the machine addresses
+- * into the pgdir under the pgd_lock.
+- */
+- for (addr = i = 0; i < UNSHARED_PTRS_PER_PGD; i++, addr += PUD_SIZE) {
+- pmds[i] = pmd_alloc_one(mm, addr);
+- if (!pmds[i])
+- goto out_oom;
+- }
+-
+- spin_lock_irqsave(&pgd_lock, flags);
+-
+- /* Protect against save/restore: move below 4GB under pgd_lock. */
+- if (!xen_feature(XENFEAT_pae_pgdir_above_4gb)
+- && xen_create_contiguous_region((unsigned long)pgd, 0, 32)) {
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-out_oom:
+- while (i--)
+- pmd_free(mm, pmds[i]);
+- return 0;
+- }
+-
+- /* Copy kernel pmd contents and write-protect the new pmds. */
+- pud = pud_offset(pgd, 0);
+- for (addr = i = 0; i < UNSHARED_PTRS_PER_PGD;
+- i++, pud++, addr += PUD_SIZE) {
+- if (i >= KERNEL_PGD_BOUNDARY) {
+- memcpy(pmds[i],
+- (pmd_t *)pgd_page_vaddr(swapper_pg_dir[i]),
+- sizeof(pmd_t) * PTRS_PER_PMD);
+- make_lowmem_page_readonly(
+- pmds[i], XENFEAT_writable_page_tables);
+- }
+-
+- /* It is safe to poke machine addresses of pmds under the pgd_lock. */
+- pud_populate(mm, pud, pmds[i]);
+- }
+-
+- /* List required to sync kernel mapping updates and
+- * to pin/unpin on save/restore. */
+- pgd_list_add(pgd);
+-
+- spin_unlock_irqrestore(&pgd_lock, flags);
+-
+- return 1;
+-}
++#define PREALLOCATED_PMDS UNSHARED_PTRS_PER_PGD
+
+ void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd)
+ {
+@@ -596,16 +506,97 @@ void pud_populate(struct mm_struct *mm,
+ xen_tlb_flush();
+ }
+ #else /* !CONFIG_X86_PAE */
++
+ /* No need to prepopulate any pagetable entries in non-PAE modes. */
+-static int pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd)
++#define PREALLOCATED_PMDS 0
++
++#endif /* CONFIG_X86_PAE */
++
++static void free_pmds(pmd_t *pmds[], struct mm_struct *mm, bool contig)
+ {
+- return 1;
++ int i;
++
++ if (contig)
++ xen_destroy_contiguous_region((unsigned long)mm->pgd, 0);
++
++ for(i = 0; i < PREALLOCATED_PMDS; i++)
++ if (pmds[i])
++ pmd_free(mm, pmds[i]);
+ }
+
+-static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgd)
++static int preallocate_pmds(pmd_t *pmds[], struct mm_struct *mm)
+ {
++ int i;
++ bool failed = false;
++
++ for(i = 0; i < PREALLOCATED_PMDS; i++) {
++ pmd_t *pmd = pmd_alloc_one(mm, i << PUD_SHIFT);
++ if (pmd == NULL)
++ failed = true;
++ pmds[i] = pmd;
++ }
++
++ if (failed) {
++ free_pmds(pmds, mm, false);
++ return -ENOMEM;
++ }
++
++ return 0;
++}
++
++/*
++ * Mop up any pmd pages which may still be attached to the pgd.
++ * Normally they will be freed by munmap/exit_mmap, but any pmd we
++ * preallocate which never got a corresponding vma will need to be
++ * freed manually.
++ */
++static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
++{
++ int i;
++
++ for(i = 0; i < PREALLOCATED_PMDS; i++) {
++ pgd_t pgd = pgdp[i];
++
++ if (__pgd_val(pgd) != 0) {
++ pmd_t *pmd = (pmd_t *)pgd_page_vaddr(pgd);
++
++ pgdp[i] = xen_make_pgd(0);
++
++ paravirt_release_pmd(pgd_val(pgd) >> PAGE_SHIFT);
++ pmd_free(mm, pmd);
++ }
++ }
++
++ if (!xen_feature(XENFEAT_pae_pgdir_above_4gb))
++ xen_destroy_contiguous_region((unsigned long)pgdp, 0);
++}
++
++static void pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmds[])
++{
++ pud_t *pud;
++ unsigned long addr;
++ int i;
++
++ if (PREALLOCATED_PMDS == 0) /* Work around gcc-3.4.x bug */
++ return;
++
++ pud = pud_offset(pgd, 0);
++ for (addr = i = 0; i < PREALLOCATED_PMDS;
++ i++, pud++, addr += PUD_SIZE) {
++ pmd_t *pmd = pmds[i];
++
++ if (i >= KERNEL_PGD_BOUNDARY) {
++ memcpy(pmd,
++ (pmd_t *)pgd_page_vaddr(swapper_pg_dir[i]),
++ sizeof(pmd_t) * PTRS_PER_PMD);
++ make_lowmem_page_readonly(
++ pmd, XENFEAT_writable_page_tables);
++ }
++
++ /* It is safe to poke machine addresses of pmds under the pgd_lock. */
++ pud_populate(mm, pud, pmd);
++ }
+ }
+-#endif /* CONFIG_X86_PAE */
+
+ #ifdef CONFIG_X86_64
+ /* We allocate two contiguous pages for kernel and user. */
+@@ -616,19 +607,52 @@ static void pgd_mop_up_pmds(struct mm_st
+
+ pgd_t *pgd_alloc(struct mm_struct *mm)
+ {
+- pgd_t *pgd = (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
++ pgd_t *pgd;
++ pmd_t *pmds[PREALLOCATED_PMDS];
++ unsigned long flags;
++
++ pgd = (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
++
++ if (pgd == NULL)
++ goto out;
+
+- /* so that alloc_pd can use it */
+ mm->pgd = pgd;
+- if (pgd)
+- pgd_ctor(pgd);
+
+- if (pgd && !pgd_prepopulate_pmd(mm, pgd)) {
+- free_pages((unsigned long)pgd, PGD_ORDER);
+- pgd = NULL;
++ if (preallocate_pmds(pmds, mm) != 0)
++ goto out_free_pgd;
++
++ if (paravirt_pgd_alloc(mm) != 0)
++ goto out_free_pmds;
++
++ /*
++ * Make sure that pre-populating the pmds is atomic with
++ * respect to anything walking the pgd_list, so that they
++ * never see a partially populated pgd.
++ */
++ spin_lock_irqsave(&pgd_lock, flags);
++
++#ifdef CONFIG_X86_PAE
++ /* Protect against save/restore: move below 4GB under pgd_lock. */
++ if (!xen_feature(XENFEAT_pae_pgdir_above_4gb)
++ && xen_create_contiguous_region((unsigned long)pgd, 0, 32)) {
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ goto out_free_pmds;
+ }
++#endif
++
++ pgd_ctor(pgd);
++ pgd_prepopulate_pmd(mm, pgd, pmds);
++
++ spin_unlock_irqrestore(&pgd_lock, flags);
+
+ return pgd;
++
++out_free_pmds:
++ free_pmds(pmds, mm, !xen_feature(XENFEAT_pae_pgdir_above_4gb));
++out_free_pgd:
++ free_pages((unsigned long)pgd, PGD_ORDER);
++out:
++ return NULL;
+ }
+
+ void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+@@ -644,6 +668,7 @@ void pgd_free(struct mm_struct *mm, pgd_
+ pgd_dtor(pgd);
+
+ pgd_mop_up_pmds(mm, pgd);
++ paravirt_pgd_free(mm, pgd);
+ free_pages((unsigned long)pgd, PGD_ORDER);
+ }
+
+@@ -685,7 +710,7 @@ int ptep_test_and_clear_young(struct vm_
+
+ if (pte_young(*ptep))
+ ret = test_and_clear_bit(_PAGE_BIT_ACCESSED,
+- &ptep->pte);
++ (unsigned long *) &ptep->pte);
+
+ if (ret)
+ pte_update(vma->vm_mm, addr, ptep);
+@@ -707,3 +732,42 @@ int ptep_clear_flush_young(struct vm_are
+
+ return young;
+ }
++
++int fixmaps_set;
++
++void xen_set_fixmap(enum fixed_addresses idx, maddr_t phys, pgprot_t flags)
++{
++ unsigned long address = __fix_to_virt(idx);
++ pte_t pte;
++
++ if (idx >= __end_of_fixed_addresses) {
++ BUG();
++ return;
++ }
++
++ switch (idx) {
++#ifdef CONFIG_X86_64
++ extern pte_t level1_fixmap_pgt[PTRS_PER_PTE];
++
++ case VSYSCALL_LAST_PAGE ... VSYSCALL_FIRST_PAGE:
++ pte = pfn_pte(phys >> PAGE_SHIFT, flags);
++ set_pte_vaddr_pud(level3_user_pgt, address, pte);
++ break;
++ case FIX_EARLYCON_MEM_BASE:
++ xen_l1_entry_update(level1_fixmap_pgt + pte_index(address),
++ pfn_pte_ma(phys >> PAGE_SHIFT, flags));
++ fixmaps_set++;
++ return;
++#else
++ case FIX_WP_TEST:
++ case FIX_VDSO:
++ pte = pfn_pte(phys >> PAGE_SHIFT, flags);
++ break;
++#endif
++ default:
++ pte = pfn_pte_ma(phys >> PAGE_SHIFT, flags);
++ break;
++ }
++ set_pte_vaddr(address, pte);
++ fixmaps_set++;
++}
+Index: head-2008-12-01/arch/x86/mm/pgtable_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable_32-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -25,51 +25,49 @@
+ #include <xen/features.h>
+ #include <asm/hypervisor.h>
+
+-void show_mem(void)
++/*
++ * Associate a virtual page frame with a given physical page frame
++ * and protection flags for that frame.
++ */
++void set_pte_vaddr(unsigned long vaddr, pte_t pteval)
+ {
+- int total = 0, reserved = 0;
+- int shared = 0, cached = 0;
+- int highmem = 0;
+- struct page *page;
+- pg_data_t *pgdat;
+- unsigned long i;
+- unsigned long flags;
+-
+- printk(KERN_INFO "Mem-info:\n");
+- show_free_areas();
+- for_each_online_pgdat(pgdat) {
+- pgdat_resize_lock(pgdat, &flags);
+- for (i = 0; i < pgdat->node_spanned_pages; ++i) {
+- if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
+- touch_nmi_watchdog();
+- page = pgdat_page_nr(pgdat, i);
+- total++;
+- if (PageHighMem(page))
+- highmem++;
+- if (PageReserved(page))
+- reserved++;
+- else if (PageSwapCache(page))
+- cached++;
+- else if (page_count(page))
+- shared += page_count(page) - 1;
+- }
+- pgdat_resize_unlock(pgdat, &flags);
+- }
+- printk(KERN_INFO "%d pages of RAM\n", total);
+- printk(KERN_INFO "%d pages of HIGHMEM\n", highmem);
+- printk(KERN_INFO "%d reserved pages\n", reserved);
+- printk(KERN_INFO "%d pages shared\n", shared);
+- printk(KERN_INFO "%d pages swap cached\n", cached);
+-
+- printk(KERN_INFO "%lu pages dirty\n", global_page_state(NR_FILE_DIRTY));
+- printk(KERN_INFO "%lu pages writeback\n",
+- global_page_state(NR_WRITEBACK));
+- printk(KERN_INFO "%lu pages mapped\n", global_page_state(NR_FILE_MAPPED));
+- printk(KERN_INFO "%lu pages slab\n",
+- global_page_state(NR_SLAB_RECLAIMABLE) +
+- global_page_state(NR_SLAB_UNRECLAIMABLE));
+- printk(KERN_INFO "%lu pages pagetables\n",
+- global_page_state(NR_PAGETABLE));
++#ifndef CONFIG_XEN
++ pgd_t *pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ pte_t *pte;
++
++ pgd = swapper_pg_dir + pgd_index(vaddr);
++ if (pgd_none(*pgd)) {
++ BUG();
++ return;
++ }
++ pud = pud_offset(pgd, vaddr);
++ if (pud_none(*pud)) {
++ BUG();
++ return;
++ }
++ pmd = pmd_offset(pud, vaddr);
++ if (pmd_none(*pmd)) {
++ BUG();
++ return;
++ }
++ pte = pte_offset_kernel(pmd, vaddr);
++ if (pte_val(pteval))
++ set_pte_present(&init_mm, vaddr, pte, pteval);
++ else
++ pte_clear(&init_mm, vaddr, pte);
++
++ /*
++ * It's enough to flush this one mapping.
++ * (PGE mappings get flushed as well)
++ */
++ __flush_tlb_one(vaddr);
++#else
++ if (HYPERVISOR_update_va_mapping(vaddr, pteval,
++ UVMF_INVLPG|UVMF_ALL))
++ BUG();
++#endif
+ }
+
+ /*
+@@ -107,35 +105,10 @@ void set_pmd_pfn(unsigned long vaddr, un
+ __flush_tlb_one(vaddr);
+ }
+
+-static int fixmaps;
+ unsigned long hypervisor_virt_start = HYPERVISOR_VIRT_START;
+ unsigned long __FIXADDR_TOP = (HYPERVISOR_VIRT_START - PAGE_SIZE);
+ EXPORT_SYMBOL(__FIXADDR_TOP);
+
+-void __set_fixmap (enum fixed_addresses idx, maddr_t phys, pgprot_t flags)
+-{
+- unsigned long address = __fix_to_virt(idx);
+- pte_t pte;
+-
+- if (idx >= __end_of_fixed_addresses) {
+- BUG();
+- return;
+- }
+- switch (idx) {
+- case FIX_WP_TEST:
+- case FIX_VDSO:
+- pte = pfn_pte(phys >> PAGE_SHIFT, flags);
+- break;
+- default:
+- pte = pfn_pte_ma(phys >> PAGE_SHIFT, flags);
+- break;
+- }
+- if (HYPERVISOR_update_va_mapping(address, pte,
+- UVMF_INVLPG|UVMF_ALL))
+- BUG();
+- fixmaps++;
+-}
+-
+ /**
+ * reserve_top_address - reserves a hole in the top of kernel address space
+ * @reserve - size of hole to reserve
+@@ -145,13 +118,48 @@ void __set_fixmap (enum fixed_addresses
+ */
+ void __init reserve_top_address(unsigned long reserve)
+ {
+- BUG_ON(fixmaps > 0);
++ BUG_ON(fixmaps_set > 0);
+ printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
+ (int)-reserve);
+ __FIXADDR_TOP = -reserve - PAGE_SIZE;
+ __VMALLOC_RESERVE += reserve;
+ }
+
++/*
++ * vmalloc=size forces the vmalloc area to be exactly 'size'
++ * bytes. This can be used to increase (or decrease) the
++ * vmalloc area - the default is 128m.
++ */
++static int __init parse_vmalloc(char *arg)
++{
++ if (!arg)
++ return -EINVAL;
++
++ __VMALLOC_RESERVE = memparse(arg, &arg);
++ return 0;
++}
++early_param("vmalloc", parse_vmalloc);
++
++#ifndef CONFIG_XEN
++/*
++ * reservetop=size reserves a hole at the top of the kernel address space which
++ * a hypervisor can load into later. Needed for dynamically loaded hypervisors,
++ * so relocating the fixmap can be done before paging initialization.
++ */
++static int __init parse_reservetop(char *arg)
++{
++ unsigned long address;
++
++ if (!arg)
++ return -EINVAL;
++
++ address = memparse(arg, &arg);
++ reserve_top_address(address);
++ return 0;
++}
++early_param("reservetop", parse_reservetop);
++#endif
++
+ void make_lowmem_page_readonly(void *va, unsigned int feature)
+ {
+ pte_t *pte;
+Index: head-2008-12-01/arch/x86/pci/amd_bus.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/pci/amd_bus.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/arch/x86/pci/amd_bus.c 2008-12-01 11:49:07.000000000 +0100
+@@ -607,6 +607,14 @@ static int __init pci_io_ecs_init(void)
+ for_each_online_cpu(cpu)
+ amd_cpu_notify(&amd_cpu_notifier, (unsigned long)CPU_ONLINE,
+ (void *)(long)cpu);
++#ifdef CONFIG_XEN
++ {
++ u64 reg;
++ rdmsrl(MSR_AMD64_NB_CFG, reg);
++ if (!(reg & ENABLE_CF8_EXT_CFG))
++ return 0;
++ }
++#endif
+ pci_probe |= PCI_HAS_IO_ECS;
+
+ return 0;
+@@ -614,6 +622,10 @@ static int __init pci_io_ecs_init(void)
+
+ static int __init amd_postcore_init(void)
+ {
++#ifdef CONFIG_XEN
++ if (!is_initial_xendomain())
++ return 0;
++#endif
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ return 0;
+
+Index: head-2008-12-01/arch/x86/pci/irq-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/pci/irq-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/pci/irq-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -11,8 +11,8 @@
+ #include <linux/slab.h>
+ #include <linux/interrupt.h>
+ #include <linux/dmi.h>
+-#include <asm/io.h>
+-#include <asm/smp.h>
++#include <linux/io.h>
++#include <linux/smp.h>
+ #include <asm/io_apic.h>
+ #include <linux/irq.h>
+ #include <linux/acpi.h>
+@@ -45,7 +45,8 @@ struct irq_router {
+ char *name;
+ u16 vendor, device;
+ int (*get)(struct pci_dev *router, struct pci_dev *dev, int pirq);
+- int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq, int new);
++ int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq,
++ int new);
+ };
+
+ struct irq_router_handler {
+@@ -61,7 +62,7 @@ void (*pcibios_disable_irq)(struct pci_d
+ * and perform checksum verification.
+ */
+
+-static inline struct irq_routing_table * pirq_check_routing_table(u8 *addr)
++static inline struct irq_routing_table *pirq_check_routing_table(u8 *addr)
+ {
+ struct irq_routing_table *rt;
+ int i;
+@@ -74,10 +75,11 @@ static inline struct irq_routing_table *
+ rt->size < sizeof(struct irq_routing_table))
+ return NULL;
+ sum = 0;
+- for (i=0; i < rt->size; i++)
++ for (i = 0; i < rt->size; i++)
+ sum += addr[i];
+ if (!sum) {
+- DBG(KERN_DEBUG "PCI: Interrupt Routing Table found at 0x%p\n", rt);
++ DBG(KERN_DEBUG "PCI: Interrupt Routing Table found at 0x%p\n",
++ rt);
+ return rt;
+ }
+ return NULL;
+@@ -104,7 +106,9 @@ static struct irq_routing_table * __init
+ return rt;
+ printk(KERN_WARNING "PCI: PIRQ table NOT found at pirqaddr\n");
+ }
+- for(addr = (u8 *) isa_bus_to_virt(0xf0000); addr < (u8 *) isa_bus_to_virt(0x100000); addr += 16) {
++ for (addr = (u8 *) isa_bus_to_virt(0xf0000);
++ addr < (u8 *) isa_bus_to_virt(0x100000);
++ addr += 16) {
+ rt = pirq_check_routing_table(addr);
+ if (rt)
+ return rt;
+@@ -126,20 +130,20 @@ static void __init pirq_peer_trick(void)
+ struct irq_info *e;
+
+ memset(busmap, 0, sizeof(busmap));
+- for(i=0; i < (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); i++) {
++ for (i = 0; i < (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); i++) {
+ e = &rt->slots[i];
+ #ifdef DEBUG
+ {
+ int j;
+ DBG(KERN_DEBUG "%02x:%02x slot=%02x", e->bus, e->devfn/8, e->slot);
+- for(j=0; j<4; j++)
++ for (j = 0; j < 4; j++)
+ DBG(" %d:%02x/%04x", j, e->irq[j].link, e->irq[j].bitmap);
+ DBG("\n");
+ }
+ #endif
+ busmap[e->bus] = 1;
+ }
+- for(i = 1; i < 256; i++) {
++ for (i = 1; i < 256; i++) {
+ int node;
+ if (!busmap[i] || pci_find_bus(0, i))
+ continue;
+@@ -187,7 +191,8 @@ static unsigned int read_config_nybble(s
+ return (nr & 1) ? (x >> 4) : (x & 0xf);
+ }
+
+-static void write_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr, unsigned int val)
++static void write_config_nybble(struct pci_dev *router, unsigned offset,
++ unsigned nr, unsigned int val)
+ {
+ u8 x;
+ unsigned reg = offset + (nr >> 1);
+@@ -289,7 +294,7 @@ static int pirq_ite_get(struct pci_dev *
+ static const unsigned char pirqmap[4] = { 1, 0, 2, 3 };
+
+ WARN_ON_ONCE(pirq > 4);
+- return read_config_nybble(router,0x43, pirqmap[pirq-1]);
++ return read_config_nybble(router, 0x43, pirqmap[pirq-1]);
+ }
+
+ static int pirq_ite_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+@@ -318,7 +323,7 @@ static int pirq_opti_set(struct pci_dev
+
+ /*
+ * Cyrix: nibble offset 0x5C
+- * 0x5C bits 7:4 is INTB bits 3:0 is INTA
++ * 0x5C bits 7:4 is INTB bits 3:0 is INTA
+ * 0x5D bits 7:4 is INTD bits 3:0 is INTC
+ */
+ static int pirq_cyrix_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+@@ -354,7 +359,7 @@ static int pirq_cyrix_set(struct pci_dev
+ * Apparently there are systems implementing PCI routing table using
+ * link values 0x01-0x04 and others using 0x41-0x44 for PCI INTA..D.
+ * We try our best to handle both link mappings.
+- *
++ *
+ * Currently (2003-05-21) it appears most SiS chipsets follow the
+ * definition of routing registers from the SiS-5595 southbridge.
+ * According to the SiS 5595 datasheets the revision id's of the
+@@ -374,7 +379,7 @@ static int pirq_cyrix_set(struct pci_dev
+ *
+ * 0x62: USBIRQ:
+ * bit 6 OHCI function disabled (0), enabled (1)
+- *
++ *
+ * 0x6a: ACPI/SCI IRQ: bits 4-6 reserved
+ *
+ * 0x7e: Data Acq. Module IRQ - bits 4-6 reserved
+@@ -437,7 +442,7 @@ static int pirq_vlsi_get(struct pci_dev
+ {
+ WARN_ON_ONCE(pirq >= 9);
+ if (pirq > 8) {
+- printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq);
++ dev_info(&dev->dev, "VLSI router PIRQ escape (%d)\n", pirq);
+ return 0;
+ }
+ return read_config_nybble(router, 0x74, pirq-1);
+@@ -447,7 +452,7 @@ static int pirq_vlsi_set(struct pci_dev
+ {
+ WARN_ON_ONCE(pirq >= 9);
+ if (pirq > 8) {
+- printk(KERN_INFO "VLSI router pirq escape (%d)\n", pirq);
++ dev_info(&dev->dev, "VLSI router PIRQ escape (%d)\n", pirq);
+ return 0;
+ }
+ write_config_nybble(router, 0x74, pirq-1, irq);
+@@ -471,7 +476,8 @@ static int pirq_serverworks_get(struct p
+ return inb(0xc01) & 0xf;
+ }
+
+-static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
++static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev,
++ int pirq, int irq)
+ {
+ outb(pirq, 0xc00);
+ outb(irq, 0xc01);
+@@ -491,22 +497,20 @@ static int pirq_amd756_get(struct pci_de
+ u8 irq;
+ irq = 0;
+ if (pirq <= 4)
+- {
+ irq = read_config_nybble(router, 0x56, pirq - 1);
+- }
+- printk(KERN_INFO "AMD756: dev %04x:%04x, router pirq : %d get irq : %2d\n",
+- dev->vendor, dev->device, pirq, irq);
++ dev_info(&dev->dev,
++ "AMD756: dev [%04x/%04x], router PIRQ %d get IRQ %d\n",
++ dev->vendor, dev->device, pirq, irq);
+ return irq;
+ }
+
+ static int pirq_amd756_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq)
+ {
+- printk(KERN_INFO "AMD756: dev %04x:%04x, router pirq : %d SET irq : %2d\n",
+- dev->vendor, dev->device, pirq, irq);
++ dev_info(&dev->dev,
++ "AMD756: dev [%04x/%04x], router PIRQ %d set IRQ %d\n",
++ dev->vendor, dev->device, pirq, irq);
+ if (pirq <= 4)
+- {
+ write_config_nybble(router, 0x56, pirq - 1, irq);
+- }
+ return 1;
+ }
+
+@@ -553,50 +557,51 @@ static __init int intel_router_probe(str
+ if (pci_dev_present(pirq_440gx))
+ return 0;
+
+- switch(device)
+- {
+- case PCI_DEVICE_ID_INTEL_82371FB_0:
+- case PCI_DEVICE_ID_INTEL_82371SB_0:
+- case PCI_DEVICE_ID_INTEL_82371AB_0:
+- case PCI_DEVICE_ID_INTEL_82371MX:
+- case PCI_DEVICE_ID_INTEL_82443MX_0:
+- case PCI_DEVICE_ID_INTEL_82801AA_0:
+- case PCI_DEVICE_ID_INTEL_82801AB_0:
+- case PCI_DEVICE_ID_INTEL_82801BA_0:
+- case PCI_DEVICE_ID_INTEL_82801BA_10:
+- case PCI_DEVICE_ID_INTEL_82801CA_0:
+- case PCI_DEVICE_ID_INTEL_82801CA_12:
+- case PCI_DEVICE_ID_INTEL_82801DB_0:
+- case PCI_DEVICE_ID_INTEL_82801E_0:
+- case PCI_DEVICE_ID_INTEL_82801EB_0:
+- case PCI_DEVICE_ID_INTEL_ESB_1:
+- case PCI_DEVICE_ID_INTEL_ICH6_0:
+- case PCI_DEVICE_ID_INTEL_ICH6_1:
+- case PCI_DEVICE_ID_INTEL_ICH7_0:
+- case PCI_DEVICE_ID_INTEL_ICH7_1:
+- case PCI_DEVICE_ID_INTEL_ICH7_30:
+- case PCI_DEVICE_ID_INTEL_ICH7_31:
+- case PCI_DEVICE_ID_INTEL_ESB2_0:
+- case PCI_DEVICE_ID_INTEL_ICH8_0:
+- case PCI_DEVICE_ID_INTEL_ICH8_1:
+- case PCI_DEVICE_ID_INTEL_ICH8_2:
+- case PCI_DEVICE_ID_INTEL_ICH8_3:
+- case PCI_DEVICE_ID_INTEL_ICH8_4:
+- case PCI_DEVICE_ID_INTEL_ICH9_0:
+- case PCI_DEVICE_ID_INTEL_ICH9_1:
+- case PCI_DEVICE_ID_INTEL_ICH9_2:
+- case PCI_DEVICE_ID_INTEL_ICH9_3:
+- case PCI_DEVICE_ID_INTEL_ICH9_4:
+- case PCI_DEVICE_ID_INTEL_ICH9_5:
+- case PCI_DEVICE_ID_INTEL_TOLAPAI_0:
+- case PCI_DEVICE_ID_INTEL_ICH10_0:
+- case PCI_DEVICE_ID_INTEL_ICH10_1:
+- case PCI_DEVICE_ID_INTEL_ICH10_2:
+- case PCI_DEVICE_ID_INTEL_ICH10_3:
+- r->name = "PIIX/ICH";
+- r->get = pirq_piix_get;
+- r->set = pirq_piix_set;
+- return 1;
++ switch (device) {
++ case PCI_DEVICE_ID_INTEL_82371FB_0:
++ case PCI_DEVICE_ID_INTEL_82371SB_0:
++ case PCI_DEVICE_ID_INTEL_82371AB_0:
++ case PCI_DEVICE_ID_INTEL_82371MX:
++ case PCI_DEVICE_ID_INTEL_82443MX_0:
++ case PCI_DEVICE_ID_INTEL_82801AA_0:
++ case PCI_DEVICE_ID_INTEL_82801AB_0:
++ case PCI_DEVICE_ID_INTEL_82801BA_0:
++ case PCI_DEVICE_ID_INTEL_82801BA_10:
++ case PCI_DEVICE_ID_INTEL_82801CA_0:
++ case PCI_DEVICE_ID_INTEL_82801CA_12:
++ case PCI_DEVICE_ID_INTEL_82801DB_0:
++ case PCI_DEVICE_ID_INTEL_82801E_0:
++ case PCI_DEVICE_ID_INTEL_82801EB_0:
++ case PCI_DEVICE_ID_INTEL_ESB_1:
++ case PCI_DEVICE_ID_INTEL_ICH6_0:
++ case PCI_DEVICE_ID_INTEL_ICH6_1:
++ case PCI_DEVICE_ID_INTEL_ICH7_0:
++ case PCI_DEVICE_ID_INTEL_ICH7_1:
++ case PCI_DEVICE_ID_INTEL_ICH7_30:
++ case PCI_DEVICE_ID_INTEL_ICH7_31:
++ case PCI_DEVICE_ID_INTEL_ESB2_0:
++ case PCI_DEVICE_ID_INTEL_ICH8_0:
++ case PCI_DEVICE_ID_INTEL_ICH8_1:
++ case PCI_DEVICE_ID_INTEL_ICH8_2:
++ case PCI_DEVICE_ID_INTEL_ICH8_3:
++ case PCI_DEVICE_ID_INTEL_ICH8_4:
++ case PCI_DEVICE_ID_INTEL_ICH9_0:
++ case PCI_DEVICE_ID_INTEL_ICH9_1:
++ case PCI_DEVICE_ID_INTEL_ICH9_2:
++ case PCI_DEVICE_ID_INTEL_ICH9_3:
++ case PCI_DEVICE_ID_INTEL_ICH9_4:
++ case PCI_DEVICE_ID_INTEL_ICH9_5:
++ case PCI_DEVICE_ID_INTEL_TOLAPAI_0:
++ case PCI_DEVICE_ID_INTEL_ICH10_0:
++ case PCI_DEVICE_ID_INTEL_ICH10_1:
++ case PCI_DEVICE_ID_INTEL_ICH10_2:
++ case PCI_DEVICE_ID_INTEL_ICH10_3:
++ case PCI_DEVICE_ID_INTEL_PCH_0:
++ case PCI_DEVICE_ID_INTEL_PCH_1:
++ r->name = "PIIX/ICH";
++ r->get = pirq_piix_get;
++ r->set = pirq_piix_set;
++ return 1;
+ }
+ return 0;
+ }
+@@ -610,7 +615,7 @@ static __init int via_router_probe(struc
+ * workarounds for some buggy BIOSes
+ */
+ if (device == PCI_DEVICE_ID_VIA_82C586_0) {
+- switch(router->device) {
++ switch (router->device) {
+ case PCI_DEVICE_ID_VIA_82C686:
+ /*
+ * Asus k7m bios wrongly reports 82C686A
+@@ -635,7 +640,7 @@ static __init int via_router_probe(struc
+ }
+ }
+
+- switch(device) {
++ switch (device) {
+ case PCI_DEVICE_ID_VIA_82C586_0:
+ r->name = "VIA";
+ r->get = pirq_via586_get;
+@@ -658,28 +663,27 @@ static __init int via_router_probe(struc
+
+ static __init int vlsi_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
+ {
+- switch(device)
+- {
+- case PCI_DEVICE_ID_VLSI_82C534:
+- r->name = "VLSI 82C534";
+- r->get = pirq_vlsi_get;
+- r->set = pirq_vlsi_set;
+- return 1;
++ switch (device) {
++ case PCI_DEVICE_ID_VLSI_82C534:
++ r->name = "VLSI 82C534";
++ r->get = pirq_vlsi_get;
++ r->set = pirq_vlsi_set;
++ return 1;
+ }
+ return 0;
+ }
+
+
+-static __init int serverworks_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
++static __init int serverworks_router_probe(struct irq_router *r,
++ struct pci_dev *router, u16 device)
+ {
+- switch(device)
+- {
+- case PCI_DEVICE_ID_SERVERWORKS_OSB4:
+- case PCI_DEVICE_ID_SERVERWORKS_CSB5:
+- r->name = "ServerWorks";
+- r->get = pirq_serverworks_get;
+- r->set = pirq_serverworks_set;
+- return 1;
++ switch (device) {
++ case PCI_DEVICE_ID_SERVERWORKS_OSB4:
++ case PCI_DEVICE_ID_SERVERWORKS_CSB5:
++ r->name = "ServerWorks";
++ r->get = pirq_serverworks_get;
++ r->set = pirq_serverworks_set;
++ return 1;
+ }
+ return 0;
+ }
+@@ -688,7 +692,7 @@ static __init int sis_router_probe(struc
+ {
+ if (device != PCI_DEVICE_ID_SI_503)
+ return 0;
+-
++
+ r->name = "SIS";
+ r->get = pirq_sis_get;
+ r->set = pirq_sis_set;
+@@ -697,50 +701,45 @@ static __init int sis_router_probe(struc
+
+ static __init int cyrix_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
+ {
+- switch(device)
+- {
+- case PCI_DEVICE_ID_CYRIX_5520:
+- r->name = "NatSemi";
+- r->get = pirq_cyrix_get;
+- r->set = pirq_cyrix_set;
+- return 1;
++ switch (device) {
++ case PCI_DEVICE_ID_CYRIX_5520:
++ r->name = "NatSemi";
++ r->get = pirq_cyrix_get;
++ r->set = pirq_cyrix_set;
++ return 1;
+ }
+ return 0;
+ }
+
+ static __init int opti_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
+ {
+- switch(device)
+- {
+- case PCI_DEVICE_ID_OPTI_82C700:
+- r->name = "OPTI";
+- r->get = pirq_opti_get;
+- r->set = pirq_opti_set;
+- return 1;
++ switch (device) {
++ case PCI_DEVICE_ID_OPTI_82C700:
++ r->name = "OPTI";
++ r->get = pirq_opti_get;
++ r->set = pirq_opti_set;
++ return 1;
+ }
+ return 0;
+ }
+
+ static __init int ite_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
+ {
+- switch(device)
+- {
+- case PCI_DEVICE_ID_ITE_IT8330G_0:
+- r->name = "ITE";
+- r->get = pirq_ite_get;
+- r->set = pirq_ite_set;
+- return 1;
++ switch (device) {
++ case PCI_DEVICE_ID_ITE_IT8330G_0:
++ r->name = "ITE";
++ r->get = pirq_ite_get;
++ r->set = pirq_ite_set;
++ return 1;
+ }
+ return 0;
+ }
+
+ static __init int ali_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
+ {
+- switch(device)
+- {
++ switch (device) {
+ case PCI_DEVICE_ID_AL_M1533:
+ case PCI_DEVICE_ID_AL_M1563:
+- printk(KERN_DEBUG "PCI: Using ALI IRQ Router\n");
+ r->name = "ALI";
+ r->get = pirq_ali_get;
+ r->set = pirq_ali_set;
+@@ -751,25 +750,24 @@ static __init int ali_router_probe(struc
+
+ static __init int amd_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
+ {
+- switch(device)
+- {
+- case PCI_DEVICE_ID_AMD_VIPER_740B:
+- r->name = "AMD756";
+- break;
+- case PCI_DEVICE_ID_AMD_VIPER_7413:
+- r->name = "AMD766";
+- break;
+- case PCI_DEVICE_ID_AMD_VIPER_7443:
+- r->name = "AMD768";
+- break;
+- default:
+- return 0;
++ switch (device) {
++ case PCI_DEVICE_ID_AMD_VIPER_740B:
++ r->name = "AMD756";
++ break;
++ case PCI_DEVICE_ID_AMD_VIPER_7413:
++ r->name = "AMD766";
++ break;
++ case PCI_DEVICE_ID_AMD_VIPER_7443:
++ r->name = "AMD768";
++ break;
++ default:
++ return 0;
+ }
+ r->get = pirq_amd756_get;
+ r->set = pirq_amd756_set;
+ return 1;
+ }
+-
++
+ static __init int pico_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
+ {
+ switch (device) {
+@@ -811,7 +809,7 @@ static struct pci_dev *pirq_router_dev;
+ * FIXME: should we have an option to say "generic for
+ * chipset" ?
+ */
+-
++
+ static void __init pirq_find_router(struct irq_router *r)
+ {
+ struct irq_routing_table *rt = pirq_table;
+@@ -830,7 +828,7 @@ static void __init pirq_find_router(stru
+ r->name = "default";
+ r->get = NULL;
+ r->set = NULL;
+-
++
+ DBG(KERN_DEBUG "PCI: Attempting to find IRQ router for %04x:%04x\n",
+ rt->rtr_vendor, rt->rtr_device);
+
+@@ -841,19 +839,19 @@ static void __init pirq_find_router(stru
+ return;
+ }
+
+- for( h = pirq_routers; h->vendor; h++) {
++ for (h = pirq_routers; h->vendor; h++) {
+ /* First look for a router match */
+- if (rt->rtr_vendor == h->vendor && h->probe(r, pirq_router_dev, rt->rtr_device))
++ if (rt->rtr_vendor == h->vendor &&
++ h->probe(r, pirq_router_dev, rt->rtr_device))
+ break;
+ /* Fall back to a device match */
+- if (pirq_router_dev->vendor == h->vendor && h->probe(r, pirq_router_dev, pirq_router_dev->device))
++ if (pirq_router_dev->vendor == h->vendor &&
++ h->probe(r, pirq_router_dev, pirq_router_dev->device))
+ break;
+ }
+- printk(KERN_INFO "PCI: Using IRQ router %s [%04x/%04x] at %s\n",
+- pirq_router.name,
+- pirq_router_dev->vendor,
+- pirq_router_dev->device,
+- pci_name(pirq_router_dev));
++ dev_info(&pirq_router_dev->dev, "%s IRQ router [%04x/%04x]\n",
++ pirq_router.name,
++ pirq_router_dev->vendor, pirq_router_dev->device);
+
+ /* The device remains referenced for the kernel lifetime */
+ }
+@@ -861,11 +859,13 @@ static void __init pirq_find_router(stru
+ static struct irq_info *pirq_get_info(struct pci_dev *dev)
+ {
+ struct irq_routing_table *rt = pirq_table;
+- int entries = (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
++ int entries = (rt->size - sizeof(struct irq_routing_table)) /
++ sizeof(struct irq_info);
+ struct irq_info *info;
+
+ for (info = rt->slots; entries--; info++)
+- if (info->bus == dev->bus->number && PCI_SLOT(info->devfn) == PCI_SLOT(dev->devfn))
++ if (info->bus == dev->bus->number &&
++ PCI_SLOT(info->devfn) == PCI_SLOT(dev->devfn))
+ return info;
+ return NULL;
+ }
+@@ -884,7 +884,7 @@ static int pcibios_lookup_irq(struct pci
+ /* Find IRQ pin */
+ pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+ if (!pin) {
+- DBG(KERN_DEBUG " -> no interrupt pin\n");
++ dev_dbg(&dev->dev, "no interrupt pin\n");
+ return 0;
+ }
+ pin = pin - 1;
+@@ -893,20 +893,21 @@ static int pcibios_lookup_irq(struct pci
+
+ if (!pirq_table)
+ return 0;
+-
+- DBG(KERN_DEBUG "IRQ for %s[%c]", pci_name(dev), 'A' + pin);
++
+ info = pirq_get_info(dev);
+ if (!info) {
+- DBG(" -> not found in routing table\n" KERN_DEBUG);
++ dev_dbg(&dev->dev, "PCI INT %c not found in routing table\n",
++ 'A' + pin);
+ return 0;
+ }
+ pirq = info->irq[pin].link;
+ mask = info->irq[pin].bitmap;
+ if (!pirq) {
+- DBG(" -> not routed\n" KERN_DEBUG);
++ dev_dbg(&dev->dev, "PCI INT %c not routed\n", 'A' + pin);
+ return 0;
+ }
+- DBG(" -> PIRQ %02x, mask %04x, excl %04x", pirq, mask, pirq_table->exclusive_irqs);
++ dev_dbg(&dev->dev, "PCI INT %c -> PIRQ %02x, mask %04x, excl %04x",
++ 'A' + pin, pirq, mask, pirq_table->exclusive_irqs);
+ mask &= pcibios_irq_mask;
+
+ /* Work around broken HP Pavilion Notebooks which assign USB to
+@@ -919,7 +920,8 @@ static int pcibios_lookup_irq(struct pci
+ }
+
+ /* same for Acer Travelmate 360, but with CB and irq 11 -> 10 */
+- if (acer_tm360_irqrouting && dev->irq == 11 && dev->vendor == PCI_VENDOR_ID_O2) {
++ if (acer_tm360_irqrouting && dev->irq == 11 &&
++ dev->vendor == PCI_VENDOR_ID_O2) {
+ pirq = 0x68;
+ mask = 0x400;
+ dev->irq = r->get(pirq_router_dev, dev, pirq);
+@@ -932,51 +934,50 @@ static int pcibios_lookup_irq(struct pci
+ */
+ newirq = dev->irq;
+ if (newirq && !((1 << newirq) & mask)) {
+- if ( pci_probe & PCI_USE_PIRQ_MASK) newirq = 0;
+- else printk("\n" KERN_WARNING
+- "PCI: IRQ %i for device %s doesn't match PIRQ mask "
+- "- try pci=usepirqmask\n" KERN_DEBUG, newirq,
+- pci_name(dev));
++ if (pci_probe & PCI_USE_PIRQ_MASK)
++ newirq = 0;
++ else
++ dev_warn(&dev->dev, "IRQ %d doesn't match PIRQ mask "
++ "%#x; try pci=usepirqmask\n", newirq, mask);
+ }
+ if (!newirq && assign) {
+ for (i = 0; i < 16; i++) {
+ if (!(mask & (1 << i)))
+ continue;
+- if (pirq_penalty[i] < pirq_penalty[newirq] && can_request_irq(i, IRQF_SHARED))
++ if (pirq_penalty[i] < pirq_penalty[newirq] &&
++ can_request_irq(i, IRQF_SHARED))
+ newirq = i;
+ }
+ }
+- DBG(" -> newirq=%d", newirq);
++ dev_dbg(&dev->dev, "PCI INT %c -> newirq %d", 'A' + pin, newirq);
+
+ /* Check if it is hardcoded */
+ if ((pirq & 0xf0) == 0xf0) {
+ irq = pirq & 0xf;
+- DBG(" -> hardcoded IRQ %d\n", irq);
+- msg = "Hardcoded";
+- } else if ( r->get && (irq = r->get(pirq_router_dev, dev, pirq)) && \
+- ((!(pci_probe & PCI_USE_PIRQ_MASK)) || ((1 << irq) & mask)) ) {
+- DBG(" -> got IRQ %d\n", irq);
+- msg = "Found";
++ msg = "hardcoded";
++ } else if (r->get && (irq = r->get(pirq_router_dev, dev, pirq)) && \
++ ((!(pci_probe & PCI_USE_PIRQ_MASK)) || ((1 << irq) & mask))) {
++ msg = "found";
+ eisa_set_level_irq(irq);
+- } else if (newirq && r->set && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) {
+- DBG(" -> assigning IRQ %d", newirq);
++ } else if (newirq && r->set &&
++ (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) {
+ if (r->set(pirq_router_dev, dev, pirq, newirq)) {
+ eisa_set_level_irq(newirq);
+- DBG(" ... OK\n");
+- msg = "Assigned";
++ msg = "assigned";
+ irq = newirq;
+ }
+ }
+
+ if (!irq) {
+- DBG(" ... failed\n");
+ if (newirq && mask == (1 << newirq)) {
+- msg = "Guessed";
++ msg = "guessed";
+ irq = newirq;
+- } else
++ } else {
++ dev_dbg(&dev->dev, "can't route interrupt\n");
+ return 0;
++ }
+ }
+- printk(KERN_INFO "PCI: %s IRQ %d for device %s\n", msg, irq, pci_name(dev));
++ dev_info(&dev->dev, "%s PCI INT %c -> IRQ %d\n", msg, 'A' + pin, irq);
+
+ /* Update IRQ for all devices with the same pirq value */
+ while ((dev2 = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev2)) != NULL) {
+@@ -988,20 +989,25 @@ static int pcibios_lookup_irq(struct pci
+ if (!info)
+ continue;
+ if (info->irq[pin].link == pirq) {
+- /* We refuse to override the dev->irq information. Give a warning! */
+- if ( dev2->irq && dev2->irq != irq && \
++ /*
++ * We refuse to override the dev->irq
++ * information. Give a warning!
++ */
++ if (dev2->irq && dev2->irq != irq && \
+ (!(pci_probe & PCI_USE_PIRQ_MASK) || \
+- ((1 << dev2->irq) & mask)) ) {
++ ((1 << dev2->irq) & mask))) {
+ #ifndef CONFIG_PCI_MSI
+- printk(KERN_INFO "IRQ routing conflict for %s, have irq %d, want irq %d\n",
+- pci_name(dev2), dev2->irq, irq);
++ dev_info(&dev2->dev, "IRQ routing conflict: "
++ "have IRQ %d, want IRQ %d\n",
++ dev2->irq, irq);
+ #endif
+- continue;
+- }
++ continue;
++ }
+ dev2->irq = irq;
+ pirq_penalty[irq]++;
+ if (dev != dev2)
+- printk(KERN_INFO "PCI: Sharing IRQ %d with %s\n", irq, pci_name(dev2));
++ dev_info(&dev->dev, "sharing IRQ %d with %s\n",
++ irq, pci_name(dev2));
+ }
+ }
+ return 1;
+@@ -1015,15 +1021,20 @@ static void __init pcibios_fixup_irqs(vo
+ DBG(KERN_DEBUG "PCI: IRQ fixup\n");
+ while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ /*
+- * If the BIOS has set an out of range IRQ number, just ignore it.
+- * Also keep track of which IRQ's are already in use.
++ * If the BIOS has set an out of range IRQ number, just
++ * ignore it. Also keep track of which IRQ's are
++ * already in use.
+ */
+ if (dev->irq >= 16) {
+- DBG(KERN_DEBUG "%s: ignoring bogus IRQ %d\n", pci_name(dev), dev->irq);
++ dev_dbg(&dev->dev, "ignoring bogus IRQ %d\n", dev->irq);
+ dev->irq = 0;
+ }
+- /* If the IRQ is already assigned to a PCI device, ignore its ISA use penalty */
+- if (pirq_penalty[dev->irq] >= 100 && pirq_penalty[dev->irq] < 100000)
++ /*
++ * If the IRQ is already assigned to a PCI device,
++ * ignore its ISA use penalty
++ */
++ if (pirq_penalty[dev->irq] >= 100 &&
++ pirq_penalty[dev->irq] < 100000)
+ pirq_penalty[dev->irq] = 0;
+ pirq_penalty[dev->irq]++;
+ }
+@@ -1035,13 +1046,17 @@ static void __init pcibios_fixup_irqs(vo
+ /*
+ * Recalculate IRQ numbers if we use the I/O APIC.
+ */
+- if (io_apic_assign_pci_irqs)
+- {
++ if (io_apic_assign_pci_irqs) {
+ int irq;
+
+ if (pin) {
+- pin--; /* interrupt pins are numbered starting from 1 */
+- irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin);
++ /*
++ * interrupt pins are numbered starting
++ * from 1
++ */
++ pin--;
++ irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
++ PCI_SLOT(dev->devfn), pin);
+ /*
+ * Busses behind bridges are typically not listed in the MP-table.
+ * In this case we have to look up the IRQ based on the parent bus,
+@@ -1049,18 +1064,18 @@ static void __init pcibios_fixup_irqs(vo
+ * busses itself so we should get into this branch reliably.
+ */
+ if (irq < 0 && dev->bus->parent) { /* go back to the bridge */
+- struct pci_dev * bridge = dev->bus->self;
++ struct pci_dev *bridge = dev->bus->self;
+
+ pin = (pin + PCI_SLOT(dev->devfn)) % 4;
+- irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
++ irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
+ PCI_SLOT(bridge->devfn), pin);
+ if (irq >= 0)
+- printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n",
+- pci_name(bridge), 'A' + pin, irq);
++ dev_warn(&dev->dev, "using bridge %s INT %c to get IRQ %d\n",
++ pci_name(bridge),
++ 'A' + pin, irq);
+ }
+ if (irq >= 0) {
+- printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n",
+- pci_name(dev), 'A' + pin, irq);
++ dev_info(&dev->dev, "PCI->APIC IRQ transform: INT %c -> IRQ %d\n", 'A' + pin, irq);
+ dev->irq = irq;
+ }
+ }
+@@ -1082,7 +1097,8 @@ static int __init fix_broken_hp_bios_irq
+ {
+ if (!broken_hp_bios_irq9) {
+ broken_hp_bios_irq9 = 1;
+- printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident);
++ printk(KERN_INFO "%s detected - fixing broken IRQ routing\n",
++ d->ident);
+ }
+ return 0;
+ }
+@@ -1095,7 +1111,8 @@ static int __init fix_acer_tm360_irqrout
+ {
+ if (!acer_tm360_irqrouting) {
+ acer_tm360_irqrouting = 1;
+- printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident);
++ printk(KERN_INFO "%s detected - fixing broken IRQ routing\n",
++ d->ident);
+ }
+ return 0;
+ }
+@@ -1107,7 +1124,8 @@ static struct dmi_system_id __initdata p
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_BIOS_VERSION, "GE.M1.03"),
+- DMI_MATCH(DMI_PRODUCT_VERSION, "HP Pavilion Notebook Model GE"),
++ DMI_MATCH(DMI_PRODUCT_VERSION,
++ "HP Pavilion Notebook Model GE"),
+ DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
+ },
+ },
+@@ -1122,7 +1140,7 @@ static struct dmi_system_id __initdata p
+ { }
+ };
+
+-static int __init pcibios_irq_init(void)
++int __init pcibios_irq_init(void)
+ {
+ DBG(KERN_DEBUG "PCI: IRQ init\n");
+
+@@ -1142,11 +1160,14 @@ static int __init pcibios_irq_init(void)
+ pirq_find_router(&pirq_router);
+ if (pirq_table->exclusive_irqs) {
+ int i;
+- for (i=0; i<16; i++)
++ for (i = 0; i < 16; i++)
+ if (!(pirq_table->exclusive_irqs & (1 << i)))
+ pirq_penalty[i] += 100;
+ }
+- /* If we're using the I/O APIC, avoid using the PCI IRQ routing table */
++ /*
++ * If we're using the I/O APIC, avoid using the PCI IRQ
++ * routing table
++ */
+ if (io_apic_assign_pci_irqs)
+ pirq_table = NULL;
+ }
+@@ -1157,9 +1178,6 @@ static int __init pcibios_irq_init(void)
+ return 0;
+ }
+
+-subsys_initcall(pcibios_irq_init);
+-
+-
+ static void pirq_penalize_isa_irq(int irq, int active)
+ {
+ /*
+@@ -1193,7 +1211,7 @@ static int pirq_enable_irq(struct pci_de
+ if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) {
+ char *msg = "";
+
+- pin--; /* interrupt pins are numbered starting from 1 */
++ pin--; /* interrupt pins are numbered starting from 1 */
+
+ if (io_apic_assign_pci_irqs) {
+ int irq;
+@@ -1207,35 +1225,41 @@ static int pirq_enable_irq(struct pci_de
+ */
+ temp_dev = dev;
+ while (irq < 0 && dev->bus->parent) { /* go back to the bridge */
+- struct pci_dev * bridge = dev->bus->self;
++ struct pci_dev *bridge = dev->bus->self;
+
+ pin = (pin + PCI_SLOT(dev->devfn)) % 4;
+- irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
++ irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
+ PCI_SLOT(bridge->devfn), pin);
+ if (irq >= 0)
+- printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n",
+- pci_name(bridge), 'A' + pin, irq);
++ dev_warn(&dev->dev, "using bridge %s "
++ "INT %c to get IRQ %d\n",
++ pci_name(bridge), 'A' + pin,
++ irq);
+ dev = bridge;
+ }
+ dev = temp_dev;
+ if (irq >= 0) {
+- printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n",
+- pci_name(dev), 'A' + pin, irq);
++ dev_info(&dev->dev, "PCI->APIC IRQ transform: "
++ "INT %c -> IRQ %d\n", 'A' + pin, irq);
+ dev->irq = irq;
+ return 0;
+ } else
+- msg = " Probably buggy MP table.";
++ msg = "; probably buggy MP table";
+ } else if (pci_probe & PCI_BIOS_IRQ_SCAN)
+ msg = "";
+ else
+- msg = " Please try using pci=biosirq.";
++ msg = "; please try using pci=biosirq";
+
+- /* With IDE legacy devices the IRQ lookup failure is not a problem.. */
+- if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && !(dev->class & 0x5))
++ /*
++ * With IDE legacy devices the IRQ lookup failure is not
++ * a problem..
++ */
++ if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE &&
++ !(dev->class & 0x5))
+ return 0;
+
+- printk(KERN_WARNING "PCI: No IRQ known for interrupt pin %c of device %s.%s\n",
+- 'A' + pin, pci_name(dev), msg);
++ dev_warn(&dev->dev, "can't find IRQ for PCI INT %c%s\n",
++ 'A' + pin, msg);
+ }
+ return 0;
+ }
+Index: head-2008-12-01/arch/x86/vdso/Makefile
+===================================================================
+--- head-2008-12-01.orig/arch/x86/vdso/Makefile 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/vdso/Makefile 2008-12-01 11:49:07.000000000 +0100
+@@ -65,9 +65,7 @@ obj-$(VDSO32-y) += vdso32-syms.lds
+ vdso32.so-$(VDSO32-y) += int80
+ vdso32.so-$(CONFIG_COMPAT) += syscall
+ vdso32.so-$(VDSO32-y) += sysenter
+-xen-vdso32-$(subst 1,$(CONFIG_COMPAT),$(shell expr $(CONFIG_XEN_COMPAT)0 '<' 0x0302000)) += int80
+-xen-vdso32-$(CONFIG_X86_32) += syscall
+-vdso32.so-$(CONFIG_XEN) += $(xen-vdso32-y)
++vdso32.so-$(CONFIG_X86_XEN) += syscall
+
+ vdso32-images = $(vdso32.so-y:%=vdso32-%.so)
+
+Index: head-2008-12-01/arch/x86/vdso/vdso32.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/vdso/vdso32.S 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/arch/x86/vdso/vdso32.S 2008-12-01 11:49:07.000000000 +0100
+@@ -9,7 +9,7 @@ vdso32_int80_end:
+
+ .globl vdso32_syscall_start, vdso32_syscall_end
+ vdso32_syscall_start:
+-#ifdef CONFIG_COMPAT
++#if defined(CONFIG_COMPAT) || defined(CONFIG_X86_XEN)
+ .incbin "arch/x86/vdso/vdso32-syscall.so"
+ #endif
+ vdso32_syscall_end:
+@@ -19,16 +19,4 @@ vdso32_sysenter_start:
+ .incbin "arch/x86/vdso/vdso32-sysenter.so"
+ vdso32_sysenter_end:
+
+-#if defined(CONFIG_X86_64_XEN) && CONFIG_XEN_COMPAT < 0x030200
+- .globl vdso32_int80_start, vdso32_int80_end
+-vdso32_int80_start:
+- .incbin "arch/x86/vdso/vdso32-int80.so"
+-vdso32_int80_end:
+-#elif defined(CONFIG_X86_XEN)
+- .globl vdso32_syscall_start, vdso32_syscall_end
+-vdso32_syscall_start:
+- .incbin "arch/x86/vdso/vdso32-syscall.so"
+-vdso32_syscall_end:
+-#endif
+-
+ __FINIT
+Index: head-2008-12-01/arch/x86/vdso/vdso32-setup-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/vdso/vdso32-setup-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/arch/x86/vdso/vdso32-setup-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -195,50 +195,28 @@ static __init void relocate_vdso(Elf32_E
+ }
+ }
+
+-/*
+- * These symbols are defined by vdso32.S to mark the bounds
+- * of the ELF DSO images included therein.
+- */
+-extern const char vdso32_default_start, vdso32_default_end;
+-extern const char vdso32_sysenter_start, vdso32_sysenter_end;
+ static struct page *vdso32_pages[1];
+
+ #ifdef CONFIG_X86_64
+
+-#if CONFIG_XEN_COMPAT < 0x030200
+-static int use_int80 = 1;
+-#endif
+-static int use_sysenter __read_mostly = -1;
+-
+-#define vdso32_sysenter() (use_sysenter > 0)
++#define vdso32_sysenter() (boot_cpu_has(X86_FEATURE_SYSENTER32))
++#define vdso32_syscall() (boot_cpu_has(X86_FEATURE_SYSCALL32))
+
+-/* May not be __init: called during resume */
+-void syscall32_cpu_init(void)
++void __cpuinit syscall32_cpu_init(void)
+ {
+- static const struct callback_register cstar = {
++ static /*const*/ struct callback_register __cpuinitdata cstar = {
+ .type = CALLBACKTYPE_syscall32,
+ .address = (unsigned long)ia32_cstar_target
+ };
+- static const struct callback_register sysenter = {
++ static /*const*/ struct callback_register __cpuinitdata sysenter = {
+ .type = CALLBACKTYPE_sysenter,
+ .address = (unsigned long)ia32_sysenter_target
+ };
+
+- if ((HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter) < 0) ||
+- (HYPERVISOR_callback_op(CALLBACKOP_register, &cstar) < 0))
+-#if CONFIG_XEN_COMPAT < 0x030200
+- return;
+- use_int80 = 0;
+-#else
+- BUG();
+-#endif
+-
+- if (use_sysenter < 0) {
+- if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+- use_sysenter = 1;
+- if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR)
+- use_sysenter = 1;
+- }
++ if (HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter) < 0)
++ setup_clear_cpu_cap(X86_FEATURE_SYSENTER32);
++ if (HYPERVISOR_callback_op(CALLBACKOP_register, &cstar) < 0)
++ setup_clear_cpu_cap(X86_FEATURE_SYSCALL32);
+ }
+
+ #define compat_uses_vma 1
+@@ -250,6 +228,7 @@ static inline void map_compat_vdso(int m
+ #else /* CONFIG_X86_32 */
+
+ #define vdso32_sysenter() (boot_cpu_has(X86_FEATURE_SEP))
++#define vdso32_syscall() (boot_cpu_has(X86_FEATURE_SYSCALL32))
+
+ extern asmlinkage void ia32pv_cstar_target(void);
+ static /*const*/ struct callback_register __cpuinitdata cstar = {
+@@ -265,13 +244,13 @@ void __cpuinit enable_sep_cpu(void)
+ .address = { __KERNEL_CS, (unsigned long)ia32pv_sysenter_target },
+ };
+
+- if (boot_cpu_has(X86_FEATURE_SYSCALL)) {
++ if (vdso32_syscall()) {
+ if (HYPERVISOR_callback_op(CALLBACKOP_register, &cstar) != 0)
+ BUG();
+ return;
+ }
+
+- if (!boot_cpu_has(X86_FEATURE_SEP))
++ if (!vdso32_sysenter())
+ return;
+
+ if (xen_feature(XENFEAT_supervisor_mode_kernel))
+@@ -341,34 +320,26 @@ int __init sysenter_setup(void)
+
+ #ifdef CONFIG_X86_32
+ gate_vma_init();
+-#endif
+
+-#if defined(CONFIG_X86_64) && CONFIG_XEN_COMPAT < 0x030200
+- if (use_int80) {
+- extern const char vdso32_int80_start, vdso32_int80_end;
+-
+- vsyscall = &vdso32_int80_start;
+- vsyscall_len = &vdso32_int80_end - &vdso32_int80_start;
+- } else
+-#elif defined(CONFIG_X86_32)
+- if (boot_cpu_has(X86_FEATURE_SYSCALL)
+- && (boot_cpu_data.x86_vendor != X86_VENDOR_AMD
+- || HYPERVISOR_callback_op(CALLBACKOP_register, &cstar) != 0))
+- setup_clear_cpu_cap(X86_FEATURE_SYSCALL);
+- barrier(); /* until clear_bit()'s constraints are correct ... */
+ if (boot_cpu_has(X86_FEATURE_SYSCALL)) {
+- extern const char vdso32_syscall_start, vdso32_syscall_end;
+-
++ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD
++ && HYPERVISOR_callback_op(CALLBACKOP_register, &cstar) == 0)
++ setup_force_cpu_cap(X86_FEATURE_SYSCALL32);
++ else {
++ setup_clear_cpu_cap(X86_FEATURE_SYSCALL);
++ setup_clear_cpu_cap(X86_FEATURE_SYSCALL32);
++ }
++ }
++#endif
++ if (vdso32_syscall()) {
+ vsyscall = &vdso32_syscall_start;
+ vsyscall_len = &vdso32_syscall_end - &vdso32_syscall_start;
+- } else
+-#endif
+- if (!vdso32_sysenter()) {
+- vsyscall = &vdso32_default_start;
+- vsyscall_len = &vdso32_default_end - &vdso32_default_start;
+- } else {
++ } else if (vdso32_sysenter()){
+ vsyscall = &vdso32_sysenter_start;
+ vsyscall_len = &vdso32_sysenter_end - &vdso32_sysenter_start;
++ } else {
++ vsyscall = &vdso32_int80_start;
++ vsyscall_len = &vdso32_int80_end - &vdso32_int80_start;
+ }
+
+ memcpy(syscall_page, vsyscall, vsyscall_len);
+Index: head-2008-12-01/arch/x86/xen/Kconfig
+===================================================================
+--- head-2008-12-01.orig/arch/x86/xen/Kconfig 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/arch/x86/xen/Kconfig 2008-12-01 11:49:07.000000000 +0100
+@@ -17,7 +17,7 @@ config XEN_MAX_DOMAIN_MEMORY
+ int "Maximum allowed size of a domain in gigabytes"
+ default 8 if X86_32
+ default 32 if X86_64
+- depends on XEN
++ depends on PARAVIRT_XEN
+ help
+ The pseudo-physical to machine address array is sized
+ according to the maximum possible memory size of a Xen
+@@ -26,5 +26,5 @@ config XEN_MAX_DOMAIN_MEMORY
+
+ config XEN_SAVE_RESTORE
+ bool
+- depends on PM
++ depends on PARAVIRT_XEN && PM
+ default y
+\ No newline at end of file
+Index: head-2008-12-01/drivers/acpi/processor_core.c
+===================================================================
+--- head-2008-12-01.orig/drivers/acpi/processor_core.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/acpi/processor_core.c 2008-12-01 11:49:07.000000000 +0100
+@@ -721,9 +721,11 @@ static int __cpuinit acpi_processor_star
+ if (result)
+ goto end;
+
+- sysdev = get_cpu_sysdev(pr->id);
+- if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev"))
+- return -EFAULT;
++ if (pr->id != -1) {
++ sysdev = get_cpu_sysdev(pr->id);
++ if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev"))
++ return -EFAULT;
++ }
+
+ status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY,
+ acpi_processor_notify, pr);
+@@ -895,7 +897,8 @@ static int acpi_processor_remove(struct
+ status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY,
+ acpi_processor_notify);
+
+- sysfs_remove_link(&device->dev.kobj, "sysdev");
++ if (pr->id != -1)
++ sysfs_remove_link(&device->dev.kobj, "sysdev");
+
+ acpi_processor_remove_fs(device);
+
+Index: head-2008-12-01/drivers/char/tpm/tpm_vtpm.c
+===================================================================
+--- head-2008-12-01.orig/drivers/char/tpm/tpm_vtpm.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/drivers/char/tpm/tpm_vtpm.c 2008-12-01 11:49:07.000000000 +0100
+@@ -347,7 +347,7 @@ static int _vtpm_send_queued(struct tpm_
+ {
+ int rc;
+ int error = 0;
+- long flags;
++ unsigned long flags;
+ unsigned char buffer[1];
+ struct vtpm_state *vtpms;
+ vtpms = (struct vtpm_state *)chip_get_private(chip);
+Index: head-2008-12-01/drivers/misc/Kconfig
+===================================================================
+--- head-2008-12-01.orig/drivers/misc/Kconfig 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/drivers/misc/Kconfig 2008-12-01 11:49:07.000000000 +0100
+@@ -438,7 +438,7 @@ config ENCLOSURE_SERVICES
+ config SGI_XP
+ tristate "Support communication between SGI SSIs"
+ depends on NET
+- depends on (IA64_GENERIC || IA64_SGI_SN2 || IA64_SGI_UV || X86_64) && SMP
++ depends on (IA64_GENERIC || IA64_SGI_SN2 || IA64_SGI_UV || X86_64) && SMP && !XEN
+ select IA64_UNCACHED_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+ select GENERIC_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+ select SGI_GRU if (IA64_GENERIC || IA64_SGI_UV || X86_64) && SMP
+@@ -465,7 +465,7 @@ config HP_ILO
+
+ config SGI_GRU
+ tristate "SGI GRU driver"
+- depends on (X86_64 || IA64_SGI_UV || IA64_GENERIC) && SMP
++ depends on (X86_64 || IA64_SGI_UV || IA64_GENERIC) && SMP && !XEN
+ default n
+ select MMU_NOTIFIER
+ ---help---
+Index: head-2008-12-01/drivers/pci/msi-xen.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/msi-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/pci/msi-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -90,12 +90,10 @@ arch_teardown_msi_irqs(struct pci_dev *d
+ }
+ #endif
+
+-static void msi_set_enable(struct pci_dev *dev, int enable)
++static void __msi_set_enable(struct pci_dev *dev, int pos, int enable)
+ {
+- int pos;
+ u16 control;
+
+- pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+ if (pos) {
+ pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
+ control &= ~PCI_MSI_FLAGS_ENABLE;
+@@ -105,6 +103,11 @@ static void msi_set_enable(struct pci_de
+ }
+ }
+
++static void msi_set_enable(struct pci_dev *dev, int enable)
++{
++ __msi_set_enable(dev, pci_find_capability(dev, PCI_CAP_ID_MSI), enable);
++}
++
+ static void msix_set_enable(struct pci_dev *dev, int enable)
+ {
+ int pos;
+@@ -573,9 +576,8 @@ int pci_enable_msi(struct pci_dev* dev)
+
+ /* Check whether driver already requested for MSI-X irqs */
+ if (dev->msix_enabled) {
+- printk(KERN_INFO "PCI: %s: Can't enable MSI. "
+- "Device already has MSI-X enabled\n",
+- pci_name(dev));
++ dev_info(&dev->dev, "can't enable MSI "
++ "(MSI-X already enabled)\n");
+ return -EINVAL;
+ }
+
+@@ -707,9 +709,8 @@ int pci_enable_msix(struct pci_dev* dev,
+ temp = dev->irq;
+ /* Check whether driver already requested for MSI vector */
+ if (dev->msi_enabled) {
+- printk(KERN_INFO "PCI: %s: Can't enable MSI-X. "
+- "Device already has an MSI irq assigned\n",
+- pci_name(dev));
++ dev_info(&dev->dev, "can't enable MSI-X "
++ "(MSI IRQ already assigned)\n");
+ return -EINVAL;
+ }
+
+Index: head-2008-12-01/drivers/pci/quirks.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/quirks.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/drivers/pci/quirks.c 2008-12-01 11:49:07.000000000 +0100
+@@ -42,9 +42,7 @@ static void __devinit quirk_release_reso
+ /* PCI Host Bridge isn't a target device */
+ return;
+ }
+- printk(KERN_INFO
+- "PCI: Disable device and release resources [%s].\n",
+- pci_name(dev));
++ dev_info(&dev->dev, "disable device and release resources\n");
+ pci_disable_device(dev);
+
+ for (i=0; i < PCI_NUM_RESOURCES; i++) {
+Index: head-2008-12-01/drivers/pci/setup-res.c
+===================================================================
+--- head-2008-12-01.orig/drivers/pci/setup-res.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/drivers/pci/setup-res.c 2008-12-01 11:50:17.000000000 +0100
+@@ -129,7 +129,7 @@ int pci_claim_resource(struct pci_dev *d
+ #ifdef CONFIG_PCI_REASSIGN
+ void pci_disable_bridge_window(struct pci_dev *dev)
+ {
+- printk(KERN_DEBUG "PCI: Disable bridge window on %s\n", pci_name(dev));
++ dev_dbg(&dev->dev, "disable bridge window\n");
+
+ /* MMIO Base/Limit */
+ pci_write_config_dword(dev, PCI_MEMORY_BASE, 0x0000fff0);
+@@ -190,8 +190,8 @@ int pci_assign_resource(struct pci_dev *
+ res->flags &= ~IORESOURCE_STARTALIGN;
+ if (resno < PCI_BRIDGE_RESOURCES) {
+ #ifdef CONFIG_PCI_REASSIGN
+- printk(KERN_DEBUG "PCI: Assign resource(%d) on %s "
+- "%016llx - %016llx\n", resno, pci_name(dev),
++ dev_dbg(&dev->dev, "assign resource(%d) "
++ "%016llx - %016llx\n", resno,
+ (unsigned long long)res->start,
+ (unsigned long long)res->end);
+ #endif
+@@ -235,8 +235,8 @@ int pci_assign_resource_fixed(struct pci
+ (unsigned long long)res->end);
+ } else if (resno < PCI_BRIDGE_RESOURCES) {
+ #ifdef CONFIG_PCI_REASSIGN
+- printk(KERN_DEBUG "PCI: Assign resource(%d) on %s "
+- "%016llx - %016llx\n", resno, pci_name(dev),
++ dev_dbg(&dev->dev, "assign resource(%d) "
++ "%016llx - %016llx\n", resno,
+ (unsigned long long)res->start,
+ (unsigned long long)res->end);
+ #endif
+Index: head-2008-12-01/drivers/xen/Makefile
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/Makefile 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/Makefile 2008-12-01 11:49:07.000000000 +0100
+@@ -1,4 +1,4 @@
+-obj-$(CONFIG_PARAVIRT_XEN) += grant-table.o features.o events.o
++obj-$(CONFIG_PARAVIRT_XEN) += grant-table.o features.o events.o manage.o
+ xen-xencomm-$(CONFIG_PARAVIRT_XEN) := xencomm.o
+ xen-balloon-$(CONFIG_PARAVIRT_XEN) := balloon.o
+
+Index: head-2008-12-01/drivers/xen/balloon/sysfs.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/balloon/sysfs.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/drivers/xen/balloon/sysfs.c 2008-12-01 11:49:07.000000000 +0100
+@@ -45,6 +45,7 @@
+
+ #define BALLOON_SHOW(name, format, args...) \
+ static ssize_t show_##name(struct sys_device *dev, \
++ struct sysdev_attribute *attr, \
+ char *buf) \
+ { \
+ return sprintf(buf, format, ##args); \
+@@ -59,14 +60,15 @@ BALLOON_SHOW(hard_limit_kb,
+ (bs.hard_limit!=~0UL) ? PAGES2KB(bs.hard_limit) : 0);
+ BALLOON_SHOW(driver_kb, "%lu\n", PAGES2KB(bs.driver_pages));
+
+-static ssize_t show_target_kb(struct sys_device *dev, char *buf)
++static ssize_t show_target_kb(struct sys_device *dev,
++ struct sysdev_attribute *attr, char *buf)
+ {
+ return sprintf(buf, "%lu\n", PAGES2KB(bs.target_pages));
+ }
+
+ static ssize_t store_target_kb(struct sys_device *dev,
+- const char *buf,
+- size_t count)
++ struct sysdev_attribute *attr,
++ const char *buf, size_t count)
+ {
+ char memstring[64], *endchar;
+ unsigned long long target_bytes;
+Index: head-2008-12-01/drivers/xen/blktap/blktap.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/blktap/blktap.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/blktap/blktap.c 2008-12-01 11:49:07.000000000 +0100
+@@ -54,6 +54,7 @@
+ #include <linux/gfp.h>
+ #include <linux/poll.h>
+ #include <linux/delay.h>
++#include <linux/nsproxy.h>
+ #include <asm/tlbflush.h>
+
+ #define MAX_TAP_DEV 256 /*the maximum number of tapdisk ring devices */
+@@ -483,7 +484,7 @@ found:
+
+ if ((class = get_xen_class()) != NULL)
+ device_create(class, NULL, MKDEV(blktap_major, minor),
+- "blktap%d", minor);
++ NULL, "blktap%d", minor);
+ }
+
+ out:
+@@ -1686,7 +1687,8 @@ static int __init blkif_init(void)
+ * We only create the device when a request of a new device is
+ * made.
+ */
+- device_create(class, NULL, MKDEV(blktap_major, 0), "blktap0");
++ device_create(class, NULL, MKDEV(blktap_major, 0), NULL,
++ "blktap0");
+ } else {
+ /* this is bad, but not fatal */
+ WPRINTK("blktap: sysfs xen_class not created\n");
+Index: head-2008-12-01/drivers/xen/char/mem.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/char/mem.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/char/mem.c 2008-12-01 11:49:07.000000000 +0100
+@@ -35,7 +35,7 @@ static inline int uncached_access(struct
+
+ static inline int range_is_allowed(unsigned long pfn, unsigned long size)
+ {
+-#ifdef CONFIG_NONPROMISC_DEVMEM
++#ifdef CONFIG_STRICT_DEVMEM
+ u64 from = ((u64)pfn) << PAGE_SHIFT;
+ u64 to = from + size;
+ u64 cursor = from;
+@@ -172,7 +172,10 @@ static void mmap_mem_close(struct vm_are
+
+ static struct vm_operations_struct mmap_mem_ops = {
+ .open = mmap_mem_open,
+- .close = mmap_mem_close
++ .close = mmap_mem_close,
++#ifdef CONFIG_HAVE_IOREMAP_PROT
++ .access = generic_access_phys
++#endif
+ };
+
+ static int xen_mmap_mem(struct file * file, struct vm_area_struct * vma)
+Index: head-2008-12-01/drivers/xen/console/console.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/console/console.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/console/console.c 2008-12-01 11:49:07.000000000 +0100
+@@ -416,9 +416,7 @@ static void __xencons_tx_flush(void)
+
+ if (work_done && (xencons_tty != NULL)) {
+ wake_up_interruptible(&xencons_tty->write_wait);
+- if ((xencons_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+- (xencons_tty->ldisc.write_wakeup != NULL))
+- (xencons_tty->ldisc.write_wakeup)(xencons_tty);
++ tty_wakeup(xencons_tty);
+ }
+ }
+
+@@ -619,8 +617,8 @@ static void xencons_close(struct tty_str
+ tty->closing = 1;
+ tty_wait_until_sent(tty, 0);
+ tty_driver_flush_buffer(tty);
+- if (tty->ldisc.flush_buffer != NULL)
+- tty->ldisc.flush_buffer(tty);
++ if (tty->ldisc.ops->flush_buffer != NULL)
++ tty->ldisc.ops->flush_buffer(tty);
+ tty->closing = 0;
+ spin_lock_irqsave(&xencons_lock, flags);
+ xencons_tty = NULL;
+Index: head-2008-12-01/drivers/xen/core/evtchn.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/evtchn.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/evtchn.c 2008-12-03 15:53:53.000000000 +0100
+@@ -744,9 +744,9 @@ static struct irq_chip dynirq_chip = {
+ };
+
+ /* Bitmap indicating which PIRQs require Xen to be notified on unmask. */
+-static int pirq_eoi_does_unmask;
++static bool pirq_eoi_does_unmask;
+ static DECLARE_BITMAP(pirq_needs_eoi, ALIGN(NR_PIRQS, PAGE_SIZE * 8))
+- __attribute__ ((__section__(".bss.page_aligned"), __aligned__(PAGE_SIZE)));
++ __page_aligned_bss;
+
+ static void pirq_unmask_and_notify(unsigned int evtchn, unsigned int irq)
+ {
+@@ -1002,6 +1002,7 @@ void xen_poll_irq(int irq)
+ BUG();
+ }
+
++#ifdef CONFIG_PM_SLEEP
+ static void restore_cpu_virqs(unsigned int cpu)
+ {
+ struct evtchn_bind_virq bind_virq;
+@@ -1094,6 +1095,7 @@ void irq_resume(void)
+ }
+
+ }
++#endif
+
+ #if defined(CONFIG_X86_IO_APIC)
+ #define identity_mapped_irq(irq) (!IO_APIC_IRQ((irq) - PIRQ_BASE))
+@@ -1175,7 +1177,7 @@ void __init xen_init_IRQ(void)
+ BUG_ON(!bitmap_empty(pirq_needs_eoi, PAGE_SIZE * 8));
+ eoi_mfn.mfn = virt_to_bus(pirq_needs_eoi) >> PAGE_SHIFT;
+ if (HYPERVISOR_physdev_op(PHYSDEVOP_pirq_eoi_mfn, &eoi_mfn) == 0)
+- pirq_eoi_does_unmask = 1;
++ pirq_eoi_does_unmask = true;
+
+ /* No event channels are 'live' right now. */
+ for (i = 0; i < NR_EVENT_CHANNELS; i++)
+Index: head-2008-12-01/drivers/xen/core/gnttab.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/gnttab.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/gnttab.c 2008-12-02 09:26:17.000000000 +0100
+@@ -449,6 +449,7 @@ static int map_pte_fn(pte_t *pte, struct
+ return 0;
+ }
+
++#ifdef CONFIG_PM_SLEEP
+ static int unmap_pte_fn(pte_t *pte, struct page *pmd_page,
+ unsigned long addr, void *data)
+ {
+@@ -456,6 +457,7 @@ static int unmap_pte_fn(pte_t *pte, stru
+ set_pte_at(&init_mm, addr, pte, __pte(0));
+ return 0;
+ }
++#endif
+
+ void *arch_gnttab_alloc_shared(unsigned long *frames)
+ {
+@@ -633,6 +635,75 @@ void __gnttab_dma_map_page(struct page *
+ } while (unlikely(read_seqretry(&gnttab_dma_lock, seq)));
+ }
+
++#ifdef __HAVE_ARCH_PTE_SPECIAL
++
++static unsigned int GNTMAP_pte_special;
++
++bool gnttab_pre_map_adjust(unsigned int cmd, struct gnttab_map_grant_ref *map,
++ unsigned int count)
++{
++ unsigned int i;
++
++ if (unlikely(cmd != GNTTABOP_map_grant_ref))
++ count = 0;
++
++ for (i = 0; i < count; ++i, ++map) {
++ if (!(map->flags & GNTMAP_host_map)
++ || !(map->flags & GNTMAP_application_map))
++ continue;
++ if (GNTMAP_pte_special)
++ map->flags |= GNTMAP_pte_special;
++ else {
++ BUG_ON(xen_feature(XENFEAT_auto_translated_physmap));
++ return true;
++ }
++ }
++
++ return false;
++}
++EXPORT_SYMBOL(gnttab_pre_map_adjust);
++
++#if CONFIG_XEN_COMPAT < 0x030400
++int gnttab_post_map_adjust(const struct gnttab_map_grant_ref *map, unsigned int count)
++{
++ unsigned int i;
++ int rc = 0;
++
++ for (i = 0; i < count && rc == 0; ++i, ++map) {
++ pte_t pte;
++
++ if (!(map->flags & GNTMAP_host_map)
++ || !(map->flags & GNTMAP_application_map))
++ continue;
++
++#ifdef CONFIG_X86
++ pte = __pte_ma((map->dev_bus_addr | _PAGE_PRESENT | _PAGE_USER
++ | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_NX
++ | _PAGE_SPECIAL)
++ & __supported_pte_mask);
++#else
++#error Architecture not yet supported.
++#endif
++ if (!(map->flags & GNTMAP_readonly))
++ pte = pte_mkwrite(pte);
++
++ if (map->flags & GNTMAP_contains_pte) {
++ mmu_update_t u;
++
++ u.ptr = map->host_addr;
++ u.val = __pte_val(pte);
++ rc = HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF);
++ } else
++ rc = HYPERVISOR_update_va_mapping(map->host_addr, pte, 0);
++ }
++
++ return rc;
++}
++EXPORT_SYMBOL(gnttab_post_map_adjust);
++#endif
++
++#endif /* __HAVE_ARCH_PTE_SPECIAL */
++
+ int gnttab_resume(void)
+ {
+ if (max_nr_grant_frames() < nr_grant_frames)
+@@ -640,6 +711,7 @@ int gnttab_resume(void)
+ return gnttab_map(0, nr_grant_frames - 1);
+ }
+
++#ifdef CONFIG_PM_SLEEP
+ int gnttab_suspend(void)
+ {
+ #ifdef CONFIG_X86
+@@ -649,6 +721,7 @@ int gnttab_suspend(void)
+ #endif
+ return 0;
+ }
++#endif
+
+ #else /* !CONFIG_XEN */
+
+@@ -759,6 +832,18 @@ int __devinit gnttab_init(void)
+ gnttab_free_count = nr_init_grefs - NR_RESERVED_ENTRIES;
+ gnttab_free_head = NR_RESERVED_ENTRIES;
+
++#if defined(CONFIG_XEN) && defined(__HAVE_ARCH_PTE_SPECIAL)
++ if (!xen_feature(XENFEAT_auto_translated_physmap)
++ && xen_feature(XENFEAT_gnttab_map_avail_bits)) {
++#ifdef CONFIG_X86
++ GNTMAP_pte_special = (__pte_val(pte_mkspecial(__pte_ma(0)))
++ >> _PAGE_BIT_UNUSED1) << _GNTMAP_guest_avail0;
++#else
++#error Architecture not yet supported.
++#endif
++ }
++#endif
++
+ return 0;
+
+ ini_nomem:
+Index: head-2008-12-01/drivers/xen/core/machine_kexec.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/machine_kexec.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/machine_kexec.c 2008-12-01 11:49:07.000000000 +0100
+@@ -90,7 +90,7 @@ void __init xen_machine_kexec_setup_reso
+ xen_hypervisor_res.start = range.start;
+ xen_hypervisor_res.end = range.start + range.size - 1;
+ xen_hypervisor_res.flags = IORESOURCE_BUSY | IORESOURCE_MEM;
+-#ifdef CONFIG_X86_64
++#ifdef CONFIG_X86
+ insert_resource(&iomem_resource, &xen_hypervisor_res);
+ #endif
+
+@@ -105,7 +105,7 @@ void __init xen_machine_kexec_setup_reso
+ if (range.size) {
+ crashk_res.start = range.start;
+ crashk_res.end = range.start + range.size - 1;
+-#ifdef CONFIG_X86_64
++#ifdef CONFIG_X86
+ insert_resource(&iomem_resource, &crashk_res);
+ #endif
+ }
+@@ -152,7 +152,7 @@ void __init xen_machine_kexec_setup_reso
+ return;
+ }
+
+-#ifndef CONFIG_X86_64
++#ifndef CONFIG_X86
+ void __init xen_machine_kexec_register_resources(struct resource *res)
+ {
+ request_resource(res, &xen_hypervisor_res);
+Index: head-2008-12-01/drivers/xen/core/machine_reboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/machine_reboot.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/machine_reboot.c 2008-12-01 11:49:07.000000000 +0100
+@@ -65,6 +65,7 @@ EXPORT_SYMBOL(machine_restart);
+ EXPORT_SYMBOL(machine_halt);
+ EXPORT_SYMBOL(machine_power_off);
+
++#ifdef CONFIG_PM_SLEEP
+ static void pre_suspend(void)
+ {
+ HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
+@@ -119,6 +120,7 @@ static void post_suspend(int suspend_can
+ HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
+ virt_to_mfn(pfn_to_mfn_frame_list_list);
+ }
++#endif
+
+ #else /* !(defined(__i386__) || defined(__x86_64__)) */
+
+@@ -137,6 +139,7 @@ static void post_suspend(int suspend_can
+
+ #endif
+
++#ifdef CONFIG_PM_SLEEP
+ struct suspend {
+ int fast_suspend;
+ void (*resume_notifier)(int);
+@@ -230,7 +233,8 @@ int __xen_suspend(int fast_suspend, void
+
+ if (fast_suspend) {
+ xenbus_suspend();
+- err = stop_machine_run(take_machine_down, &suspend, 0);
++ err = stop_machine(take_machine_down, &suspend,
++ &cpumask_of_cpu(0));
+ if (err < 0)
+ xenbus_suspend_cancel();
+ } else {
+@@ -253,3 +257,4 @@ int __xen_suspend(int fast_suspend, void
+
+ return 0;
+ }
++#endif
+Index: head-2008-12-01/drivers/xen/core/reboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/reboot.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/reboot.c 2008-12-01 11:49:07.000000000 +0100
+@@ -29,17 +29,12 @@ MODULE_LICENSE("Dual BSD/GPL");
+ /* Ignore multiple shutdown requests. */
+ static int shutting_down = SHUTDOWN_INVALID;
+
+-/* Was last suspend request cancelled? */
+-static int suspend_cancelled;
+-
+ /* Can we leave APs online when we suspend? */
+ static int fast_suspend;
+
+ static void __shutdown_handler(struct work_struct *unused);
+ static DECLARE_DELAYED_WORK(shutdown_work, __shutdown_handler);
+
+-static int setup_suspend_evtchn(void);
+-
+ int __xen_suspend(int fast_suspend, void (*resume_notifier)(int));
+
+ static int shutdown_process(void *__unused)
+@@ -69,6 +64,13 @@ static int shutdown_process(void *__unus
+ return 0;
+ }
+
++#ifdef CONFIG_PM_SLEEP
++
++static int setup_suspend_evtchn(void);
++
++/* Was last suspend request cancelled? */
++static int suspend_cancelled;
++
+ static void xen_resume_notifier(int _suspend_cancelled)
+ {
+ int old_state = xchg(&shutting_down, SHUTDOWN_RESUMING);
+@@ -118,6 +120,10 @@ static int xen_suspend(void *__unused)
+ return 0;
+ }
+
++#else
++# define xen_suspend NULL
++#endif
++
+ static void switch_shutdown_state(int new_state)
+ {
+ int prev_state, old_state = SHUTDOWN_INVALID;
+@@ -194,8 +200,10 @@ static void shutdown_handler(struct xenb
+ new_state = SHUTDOWN_POWEROFF;
+ else if (strcmp(str, "reboot") == 0)
+ ctrl_alt_del();
++#ifdef CONFIG_PM_SLEEP
+ else if (strcmp(str, "suspend") == 0)
+ new_state = SHUTDOWN_SUSPEND;
++#endif
+ else if (strcmp(str, "halt") == 0)
+ new_state = SHUTDOWN_HALT;
+ else
+@@ -247,6 +255,7 @@ static struct xenbus_watch sysrq_watch =
+ .callback = sysrq_handler
+ };
+
++#ifdef CONFIG_PM_SLEEP
+ static irqreturn_t suspend_int(int irq, void* dev_id)
+ {
+ switch_shutdown_state(SHUTDOWN_SUSPEND);
+@@ -274,6 +283,9 @@ static int setup_suspend_evtchn(void)
+
+ return 0;
+ }
++#else
++#define setup_suspend_evtchn() 0
++#endif
+
+ static int setup_shutdown_watcher(void)
+ {
+Index: head-2008-12-01/drivers/xen/core/smpboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/smpboot.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/smpboot.c 2008-12-01 11:49:07.000000000 +0100
+@@ -27,6 +27,7 @@
+
+ extern irqreturn_t smp_reschedule_interrupt(int, void *);
+ extern irqreturn_t smp_call_function_interrupt(int, void *);
++extern irqreturn_t smp_call_function_single_interrupt(int, void *);
+
+ extern int local_setup_timer(unsigned int cpu);
+ extern void local_teardown_timer(unsigned int cpu);
+@@ -54,8 +55,10 @@ DEFINE_PER_CPU(int, cpu_state) = { 0 };
+
+ static DEFINE_PER_CPU(int, resched_irq);
+ static DEFINE_PER_CPU(int, callfunc_irq);
++static DEFINE_PER_CPU(int, call1func_irq);
+ static char resched_name[NR_CPUS][15];
+ static char callfunc_name[NR_CPUS][15];
++static char call1func_name[NR_CPUS][15];
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+ #define set_cpu_to_apicid(cpu, apicid) (per_cpu(x86_cpu_to_apicid, cpu) = (apicid))
+@@ -77,8 +80,10 @@ void __init prefill_possible_map(void)
+
+ for (i = 0; i < NR_CPUS; i++) {
+ rc = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL);
+- if (rc >= 0)
++ if (rc >= 0) {
+ cpu_set(i, cpu_possible_map);
++ nr_cpu_ids = i + 1;
++ }
+ }
+ }
+
+@@ -114,7 +119,8 @@ static int __cpuinit xen_smp_intr_init(u
+ {
+ int rc;
+
+- per_cpu(resched_irq, cpu) = per_cpu(callfunc_irq, cpu) = -1;
++ per_cpu(resched_irq, cpu) = per_cpu(callfunc_irq, cpu) =
++ per_cpu(call1func_irq, cpu) = -1;
+
+ sprintf(resched_name[cpu], "resched%u", cpu);
+ rc = bind_ipi_to_irqhandler(RESCHEDULE_VECTOR,
+@@ -138,6 +144,17 @@ static int __cpuinit xen_smp_intr_init(u
+ goto fail;
+ per_cpu(callfunc_irq, cpu) = rc;
+
++ sprintf(call1func_name[cpu], "call1func%u", cpu);
++ rc = bind_ipi_to_irqhandler(CALL_FUNC_SINGLE_VECTOR,
++ cpu,
++ smp_call_function_single_interrupt,
++ IRQF_DISABLED|IRQF_NOBALANCING,
++ call1func_name[cpu],
++ NULL);
++ if (rc < 0)
++ goto fail;
++ per_cpu(call1func_irq, cpu) = rc;
++
+ rc = xen_spinlock_init(cpu);
+ if (rc < 0)
+ goto fail;
+@@ -152,6 +169,8 @@ static int __cpuinit xen_smp_intr_init(u
+ unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
+ if (per_cpu(callfunc_irq, cpu) >= 0)
+ unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
++ if (per_cpu(call1func_irq, cpu) >= 0)
++ unbind_from_irqhandler(per_cpu(call1func_irq, cpu), NULL);
+ xen_spinlock_cleanup(cpu);
+ return rc;
+ }
+@@ -164,6 +183,7 @@ static void __cpuexit xen_smp_intr_exit(
+
+ unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
+ unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
++ unbind_from_irqhandler(per_cpu(call1func_irq, cpu), NULL);
+ xen_spinlock_cleanup(cpu);
+ }
+ #endif
+@@ -171,11 +191,7 @@ static void __cpuexit xen_smp_intr_exit(
+ void __cpuinit cpu_bringup(void)
+ {
+ cpu_init();
+-#ifdef __i386__
+ identify_secondary_cpu(¤t_cpu_data);
+-#else
+- identify_cpu(¤t_cpu_data);
+-#endif
+ touch_softlockup_watchdog();
+ preempt_disable();
+ local_irq_enable();
+@@ -255,9 +271,6 @@ void __init smp_prepare_cpus(unsigned in
+ struct task_struct *idle;
+ int apicid;
+ struct vcpu_get_physid cpu_id;
+-#ifdef __x86_64__
+- struct desc_ptr *gdt_descr;
+-#endif
+ void *gdt_addr;
+
+ apicid = 0;
+@@ -270,7 +283,7 @@ void __init smp_prepare_cpus(unsigned in
+
+ current_thread_info()->cpu = 0;
+
+- for (cpu = 0; cpu < NR_CPUS; cpu++) {
++ for_each_possible_cpu (cpu) {
+ cpus_clear(per_cpu(cpu_sibling_map, cpu));
+ cpus_clear(per_cpu(cpu_core_map, cpu));
+ }
+@@ -297,21 +310,10 @@ void __init smp_prepare_cpus(unsigned in
+ if (IS_ERR(idle))
+ panic("failed fork for CPU %d", cpu);
+
+-#ifdef __x86_64__
+- gdt_descr = &cpu_gdt_descr[cpu];
+- gdt_descr->address = get_zeroed_page(GFP_KERNEL);
+- if (unlikely(!gdt_descr->address)) {
+- printk(KERN_CRIT "CPU%d failed to allocate GDT\n",
+- cpu);
+- continue;
+- }
+- gdt_descr->size = GDT_SIZE;
+- memcpy((void *)gdt_descr->address, cpu_gdt_table, GDT_SIZE);
+- gdt_addr = (void *)gdt_descr->address;
+-#else
++#ifdef __i386__
+ init_gdt(cpu);
+- gdt_addr = get_cpu_gdt_table(cpu);
+ #endif
++ gdt_addr = get_cpu_gdt_table(cpu);
+ make_page_readonly(gdt_addr, XENFEAT_writable_descriptor_tables);
+
+ apicid = cpu;
+Index: head-2008-12-01/drivers/xen/core/spinlock.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/spinlock.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/spinlock.c 2008-12-01 11:51:53.000000000 +0100
+@@ -73,9 +73,9 @@ int xen_spin_wait(raw_spinlock_t *lock,
+ /* announce we're spinning */
+ spinning.ticket = token;
+ spinning.lock = lock;
+- spinning.prev = __get_cpu_var(spinning);
++ spinning.prev = x86_read_percpu(spinning);
+ smp_wmb();
+- __get_cpu_var(spinning) = &spinning;
++ x86_write_percpu(spinning, &spinning);
+
+ /* clear pending */
+ xen_clear_irq_pending(irq);
+@@ -102,7 +102,7 @@ int xen_spin_wait(raw_spinlock_t *lock,
+ kstat_this_cpu.irqs[irq] += !rc;
+
+ /* announce we're done */
+- __get_cpu_var(spinning) = spinning.prev;
++ x86_write_percpu(spinning, spinning.prev);
+ rm_lock = &__get_cpu_var(spinning_rm_lock);
+ raw_local_irq_save(flags);
+ __raw_write_lock(rm_lock);
+Index: head-2008-12-01/drivers/xen/fbfront/xenfb.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/fbfront/xenfb.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/fbfront/xenfb.c 2008-12-01 11:49:07.000000000 +0100
+@@ -18,6 +18,7 @@
+ * frame buffer.
+ */
+
++#include <linux/console.h>
+ #include <linux/kernel.h>
+ #include <linux/errno.h>
+ #include <linux/fb.h>
+@@ -544,6 +545,28 @@ static unsigned long vmalloc_to_mfn(void
+ return pfn_to_mfn(vmalloc_to_pfn(address));
+ }
+
++static __devinit void
++xenfb_make_preferred_console(void)
++{
++ struct console *c;
++
++ if (console_set_on_cmdline)
++ return;
++
++ acquire_console_sem();
++ for (c = console_drivers; c; c = c->next) {
++ if (!strcmp(c->name, "tty") && c->index == 0)
++ break;
++ }
++ release_console_sem();
++ if (c) {
++ unregister_console(c);
++ c->flags |= CON_CONSDEV;
++ c->flags &= ~CON_PRINTBUFFER; /* don't print again */
++ register_console(c);
++ }
++}
++
+ static int __devinit xenfb_probe(struct xenbus_device *dev,
+ const struct xenbus_device_id *id)
+ {
+@@ -673,6 +696,7 @@ static int __devinit xenfb_probe(struct
+ goto error;
+ }
+
++ xenfb_make_preferred_console();
+ return 0;
+
+ error_nomem:
+@@ -881,4 +905,5 @@ static void __exit xenfb_cleanup(void)
+ module_init(xenfb_init);
+ module_exit(xenfb_cleanup);
+
++MODULE_DESCRIPTION("Xen virtual framebuffer device frontend");
+ MODULE_LICENSE("GPL");
+Index: head-2008-12-01/drivers/xen/fbfront/xenkbd.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/fbfront/xenkbd.c 2008-12-01 11:36:07.000000000 +0100
++++ head-2008-12-01/drivers/xen/fbfront/xenkbd.c 2008-12-01 11:49:07.000000000 +0100
+@@ -350,4 +350,5 @@ static void __exit xenkbd_cleanup(void)
+ module_init(xenkbd_init);
+ module_exit(xenkbd_cleanup);
+
++MODULE_DESCRIPTION("Xen virtual keyboard/pointer device frontend");
+ MODULE_LICENSE("GPL");
+Index: head-2008-12-01/drivers/xen/gntdev/gntdev.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/gntdev/gntdev.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/gntdev/gntdev.c 2008-12-01 11:49:07.000000000 +0100
+@@ -418,7 +418,7 @@ static int __init gntdev_init(void)
+ }
+
+ device = device_create(class, NULL, MKDEV(gntdev_major, 0),
+- GNTDEV_NAME);
++ NULL, GNTDEV_NAME);
+ if (IS_ERR(device)) {
+ printk(KERN_ERR "Error creating gntdev device in xen_class\n");
+ printk(KERN_ERR "gntdev created with major number = %d\n",
+Index: head-2008-12-01/drivers/xen/netfront/accel.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netfront/accel.c 2008-12-01 11:36:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/netfront/accel.c 2008-12-01 11:49:07.000000000 +0100
+@@ -28,6 +28,7 @@
+ * IN THE SOFTWARE.
+ */
+
++#include <linux/version.h>
+ #include <linux/netdevice.h>
+ #include <linux/skbuff.h>
+ #include <linux/list.h>
+Index: head-2008-12-01/drivers/xen/netfront/netfront.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netfront/netfront.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/netfront/netfront.c 2008-12-01 11:49:07.000000000 +0100
+@@ -640,7 +640,7 @@ static int network_open(struct net_devic
+ }
+ spin_unlock_bh(&np->rx_lock);
+
+- network_maybe_wake_tx(dev);
++ netif_start_queue(dev);
+
+ return 0;
+ }
+Index: head-2008-12-01/drivers/xen/sfc_netback/accel.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netback/accel.h 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netback/accel.h 2008-12-01 11:49:07.000000000 +0100
+@@ -25,6 +25,7 @@
+ #ifndef NETBACK_ACCEL_H
+ #define NETBACK_ACCEL_H
+
++#include <linux/version.h>
+ #include <linux/slab.h>
+ #include <linux/ip.h>
+ #include <linux/tcp.h>
+Index: head-2008-12-01/drivers/xen/sfc_netfront/accel.h
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/sfc_netfront/accel.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/drivers/xen/sfc_netfront/accel.h 2008-12-01 11:49:07.000000000 +0100
+@@ -35,6 +35,7 @@
+ #include <xen/evtchn.h>
+
+ #include <linux/kernel.h>
++#include <linux/version.h>
+ #include <linux/list.h>
+
+ enum netfront_accel_post_status {
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_comms.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_comms.c 2008-12-01 11:36:47.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_comms.c 2008-12-01 11:49:07.000000000 +0100
+@@ -228,14 +228,11 @@ int xb_init_comms(void)
+ intf->rsp_cons = intf->rsp_prod;
+ }
+
++#if defined(CONFIG_XEN) || defined(MODULE)
+ if (xenbus_irq)
+ unbind_from_irqhandler(xenbus_irq, &xb_waitq);
+
+-#if defined(CONFIG_XEN) || defined(MODULE)
+ err = bind_caller_port_to_irqhandler(
+-#else
+- err = bind_evtchn_to_irqhandler(
+-#endif
+ xen_store_evtchn, wake_waiting,
+ 0, "xenbus", &xb_waitq);
+ if (err <= 0) {
+@@ -244,6 +241,20 @@ int xb_init_comms(void)
+ }
+
+ xenbus_irq = err;
++#else
++ if (xenbus_irq) {
++ /* Already have an irq; assume we're resuming */
++ rebind_evtchn_irq(xen_store_evtchn, xenbus_irq);
++ } else {
++ err = bind_evtchn_to_irqhandler(xen_store_evtchn, wake_waiting,
++ 0, "xenbus", &xb_waitq);
++ if (err <= 0) {
++ printk(KERN_ERR "XENBUS request irq failed %i\n", err);
++ return err;
++ }
++ xenbus_irq = err;
++ }
++#endif
+
+ return 0;
+ }
+Index: head-2008-12-01/drivers/xen/xenbus/xenbus_probe.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenbus/xenbus_probe.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenbus/xenbus_probe.c 2008-12-01 11:49:07.000000000 +0100
+@@ -36,6 +36,7 @@
+ __FUNCTION__, __LINE__, ##args)
+
+ #include <linux/kernel.h>
++#include <linux/version.h>
+ #include <linux/err.h>
+ #include <linux/string.h>
+ #include <linux/ctype.h>
+Index: head-2008-12-01/fs/aio.c
+===================================================================
+--- head-2008-12-01.orig/fs/aio.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/fs/aio.c 2008-12-01 11:49:07.000000000 +0100
+@@ -1319,7 +1319,7 @@ static int make_aio_fd(struct kioctx *io
+ int fd;
+ struct file *file;
+
+- fd = anon_inode_getfd("[aioq]", &aioq_fops, ioctx);
++ fd = anon_inode_getfd("[aioq]", &aioq_fops, ioctx, 0);
+ if (fd < 0)
+ return fd;
+
+Index: head-2008-12-01/include/asm-generic/pgtable.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-generic/pgtable.h 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/include/asm-generic/pgtable.h 2008-12-01 11:49:07.000000000 +0100
+@@ -99,10 +99,6 @@ static inline void ptep_set_wrprotect(st
+ }
+ #endif
+
+-#ifndef arch_change_pte_range
+-#define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) 0
+-#endif
+-
+ #ifndef __HAVE_ARCH_PTE_SAME
+ #define pte_same(A,B) (pte_val(A) == pte_val(B))
+ #endif
+Index: head-2008-12-01/include/asm-x86/dma-mapping.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/dma-mapping.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/dma-mapping.h 2008-12-01 11:49:07.000000000 +0100
+@@ -74,7 +74,7 @@ static inline struct dma_mapping_ops *ge
+ /* Make sure we keep the same behaviour */
+ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+ {
+-#ifdef CONFIG_X86_32
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+ return 0;
+ #else
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/desc.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/desc.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/desc.h 2008-12-01 11:49:07.000000000 +0100
+@@ -31,11 +31,17 @@ extern struct desc_ptr idt_descr;
+ extern gate_desc idt_table[];
+ #endif
+
++struct gdt_page {
++ struct desc_struct gdt[GDT_ENTRIES];
++} __attribute__((aligned(PAGE_SIZE)));
++DECLARE_PER_CPU(struct gdt_page, gdt_page);
++
++static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
++{
++ return per_cpu(gdt_page, cpu).gdt;
++}
++
+ #ifdef CONFIG_X86_64
+-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+-extern struct desc_ptr cpu_gdt_descr[];
+-/* the cpu gdt accessor */
+-#define get_cpu_gdt_table(x) ((struct desc_struct *)cpu_gdt_descr[x].address)
+
+ static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
+ unsigned dpl, unsigned ist, unsigned seg)
+@@ -53,16 +59,6 @@ static inline void pack_gate(gate_desc *
+ }
+
+ #else
+-struct gdt_page {
+- struct desc_struct gdt[GDT_ENTRIES];
+-} __attribute__((aligned(PAGE_SIZE)));
+-DECLARE_PER_CPU(struct gdt_page, gdt_page);
+-
+-static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
+-{
+- return per_cpu(gdt_page, cpu).gdt;
+-}
+-
+ static inline void pack_gate(gate_desc *gate, unsigned char type,
+ unsigned long base, unsigned dpl, unsigned flags,
+ unsigned short seg)
+@@ -333,6 +329,28 @@ static inline void set_intr_gate(unsigne
+ _set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
+ }
+
++#define SYS_VECTOR_FREE 0
++#define SYS_VECTOR_ALLOCED 1
++
++extern int first_system_vector;
++extern char system_vectors[];
++
++static inline void alloc_system_vector(int vector)
++{
++ if (system_vectors[vector] == SYS_VECTOR_FREE) {
++ system_vectors[vector] = SYS_VECTOR_ALLOCED;
++ if (first_system_vector > vector)
++ first_system_vector = vector;
++ } else
++ BUG();
++}
++
++static inline void alloc_intr_gate(unsigned int n, void *addr)
++{
++ alloc_system_vector(n);
++ set_intr_gate(n, addr);
++}
++
+ /*
+ * This routine sets up an interrupt gate at directory privilege level 3.
+ */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/fixmap.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap.h 2008-12-01 11:49:07.000000000 +0100
+@@ -7,7 +7,58 @@
+ # include "fixmap_64.h"
+ #endif
+
++extern int fixmaps_set;
++
++void xen_set_fixmap(enum fixed_addresses, maddr_t, pgprot_t);
++
++static inline void __set_fixmap(enum fixed_addresses idx,
++ maddr_t phys, pgprot_t flags)
++{
++ xen_set_fixmap(idx, phys, flags);
++}
++
++#define set_fixmap(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL)
++
++/*
++ * Some hardware wants to get fixmapped without caching.
++ */
++#define set_fixmap_nocache(idx, phys) \
++ __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
++
+ #define clear_fixmap(idx) \
+ __set_fixmap(idx, 0, __pgprot(0))
+
++#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
++#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
++
++extern void __this_fixmap_does_not_exist(void);
++
++/*
++ * 'index to address' translation. If anyone tries to use the idx
++ * directly without translation, we catch the bug with a NULL-deference
++ * kernel oops. Illegal ranges of incoming indices are caught too.
++ */
++static __always_inline unsigned long fix_to_virt(const unsigned int idx)
++{
++ /*
++ * this branch gets completely eliminated after inlining,
++ * except when someone tries to use fixaddr indices in an
++ * illegal way. (such as mixing up address types or using
++ * out-of-range indices).
++ *
++ * If it doesn't get removed, the linker will complain
++ * loudly with a reasonably clear error message..
++ */
++ if (idx >= __end_of_fixed_addresses)
++ __this_fixmap_does_not_exist();
++
++ return __fix_to_virt(idx);
++}
++
++static inline unsigned long virt_to_fix(const unsigned long vaddr)
++{
++ BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
++ return __virt_to_fix(vaddr);
++}
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-12-01 11:49:07.000000000 +0100
+@@ -58,10 +58,17 @@ enum fixed_addresses {
+ #ifdef CONFIG_X86_LOCAL_APIC
+ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+ #endif
+-#if defined(CONFIG_X86_IO_APIC) && !defined(CONFIG_XEN)
++#ifndef CONFIG_XEN
++#ifdef CONFIG_X86_IO_APIC
+ FIX_IO_APIC_BASE_0,
+ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
+ #endif
++#else
++ FIX_SHARED_INFO,
++#define NR_FIX_ISAMAPS 256
++ FIX_ISAMAP_END,
++ FIX_ISAMAP_BEGIN = FIX_ISAMAP_END + NR_FIX_ISAMAPS - 1,
++#endif
+ #ifdef CONFIG_X86_VISWS_APIC
+ FIX_CO_CPU, /* Cobalt timer */
+ FIX_CO_APIC, /* Cobalt APIC Redirection Table */
+@@ -78,51 +85,38 @@ enum fixed_addresses {
+ FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
+ FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
+ #endif
+-#ifdef CONFIG_ACPI
+- FIX_ACPI_BEGIN,
+- FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
+-#endif
+ #ifdef CONFIG_PCI_MMCONFIG
+ FIX_PCIE_MCFG,
+ #endif
+ #ifdef CONFIG_PARAVIRT
+ FIX_PARAVIRT_BOOTMAP,
+ #endif
+- FIX_SHARED_INFO,
+-#define NR_FIX_ISAMAPS 256
+- FIX_ISAMAP_END,
+- FIX_ISAMAP_BEGIN = FIX_ISAMAP_END + NR_FIX_ISAMAPS - 1,
+ __end_of_permanent_fixed_addresses,
+ /*
+ * 256 temporary boot-time mappings, used by early_ioremap(),
+ * before ioremap() is functional.
+ *
+- * We round it up to the next 512 pages boundary so that we
++ * We round it up to the next 256 pages boundary so that we
+ * can have a single pgd entry and a single pte table:
+ */
+ #define NR_FIX_BTMAPS 64
+ #define FIX_BTMAPS_NESTING 4
+- FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -
+- (__end_of_permanent_fixed_addresses & 511),
++ FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
++ (__end_of_permanent_fixed_addresses & 255),
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+ FIX_WP_TEST,
++#ifdef CONFIG_ACPI
++ FIX_ACPI_BEGIN,
++ FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
++#endif
+ #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
+ FIX_OHCI1394_BASE,
+ #endif
+ __end_of_fixed_addresses
+ };
+
+-extern void __set_fixmap(enum fixed_addresses idx,
+- maddr_t phys, pgprot_t flags);
+ extern void reserve_top_address(unsigned long reserve);
+
+-#define set_fixmap(idx, phys) \
+- __set_fixmap(idx, phys, PAGE_KERNEL)
+-/*
+- * Some hardware wants to get fixmapped without caching.
+- */
+-#define set_fixmap_nocache(idx, phys) \
+- __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+
+ #define FIXADDR_TOP ((unsigned long)__FIXADDR_TOP)
+
+@@ -131,38 +125,5 @@ extern void reserve_top_address(unsigned
+ #define FIXADDR_START (FIXADDR_TOP - __FIXADDR_SIZE)
+ #define FIXADDR_BOOT_START (FIXADDR_TOP - __FIXADDR_BOOT_SIZE)
+
+-#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
+-#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
+-
+-extern void __this_fixmap_does_not_exist(void);
+-
+-/*
+- * 'index to address' translation. If anyone tries to use the idx
+- * directly without tranlation, we catch the bug with a NULL-deference
+- * kernel oops. Illegal ranges of incoming indices are caught too.
+- */
+-static __always_inline unsigned long fix_to_virt(const unsigned int idx)
+-{
+- /*
+- * this branch gets completely eliminated after inlining,
+- * except when someone tries to use fixaddr indices in an
+- * illegal way. (such as mixing up address types or using
+- * out-of-range indices).
+- *
+- * If it doesn't get removed, the linker will complain
+- * loudly with a reasonably clear error message..
+- */
+- if (idx >= __end_of_fixed_addresses)
+- __this_fixmap_does_not_exist();
+-
+- return __fix_to_virt(idx);
+-}
+-
+-static inline unsigned long virt_to_fix(const unsigned long vaddr)
+-{
+- BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
+- return __virt_to_fix(vaddr);
+-}
+-
+ #endif /* !__ASSEMBLY__ */
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/fixmap_64.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/fixmap_64.h 2008-12-01 11:49:07.000000000 +0100
+@@ -12,6 +12,7 @@
+ #define _ASM_FIXMAP_64_H
+
+ #include <linux/kernel.h>
++#include <asm/acpi.h>
+ #include <asm/apicdef.h>
+ #include <asm/page.h>
+ #include <asm/vsyscall.h>
+@@ -40,7 +41,6 @@ enum fixed_addresses {
+ VSYSCALL_HPET,
+ FIX_DBGP_BASE,
+ FIX_EARLYCON_MEM_BASE,
+- FIX_HPET_BASE,
+ #ifdef CONFIG_X86_LOCAL_APIC
+ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+ #endif
+@@ -53,14 +53,21 @@ enum fixed_addresses {
+ FIX_EFI_IO_MAP_FIRST_PAGE = FIX_EFI_IO_MAP_LAST_PAGE
+ + MAX_EFI_IO_PAGES - 1,
+ #endif
++#ifdef CONFIG_PARAVIRT
++ FIX_PARAVIRT_BOOTMAP,
++#else
++ FIX_SHARED_INFO,
++#endif
+ #ifdef CONFIG_ACPI
+ FIX_ACPI_BEGIN,
+ FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
+ #endif
+- FIX_SHARED_INFO,
+ #define NR_FIX_ISAMAPS 256
+ FIX_ISAMAP_END,
+ FIX_ISAMAP_BEGIN = FIX_ISAMAP_END + NR_FIX_ISAMAPS - 1,
++#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
++ FIX_OHCI1394_BASE,
++#endif
+ __end_of_permanent_fixed_addresses,
+ /*
+ * 256 temporary boot-time mappings, used by early_ioremap(),
+@@ -71,27 +78,12 @@ enum fixed_addresses {
+ */
+ #define NR_FIX_BTMAPS 64
+ #define FIX_BTMAPS_NESTING 4
+- FIX_BTMAP_END =
+- __end_of_permanent_fixed_addresses + 512 -
++ FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -
+ (__end_of_permanent_fixed_addresses & 511),
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+-#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
+- FIX_OHCI1394_BASE,
+-#endif
+ __end_of_fixed_addresses
+ };
+
+-extern void __set_fixmap(enum fixed_addresses idx,
+- unsigned long phys, pgprot_t flags);
+-
+-#define set_fixmap(idx, phys) \
+- __set_fixmap(idx, phys, PAGE_KERNEL)
+-/*
+- * Some hardware wants to get fixmapped without caching.
+- */
+-#define set_fixmap_nocache(idx, phys) \
+- __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+-
+ #define FIXADDR_TOP (VSYSCALL_END-PAGE_SIZE)
+ #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
+ #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
+@@ -100,30 +92,4 @@ extern void __set_fixmap(enum fixed_addr
+ #define FIXADDR_USER_START ((unsigned long)VSYSCALL32_VSYSCALL)
+ #define FIXADDR_USER_END (FIXADDR_USER_START + PAGE_SIZE)
+
+-#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
+-
+-extern void __this_fixmap_does_not_exist(void);
+-
+-/*
+- * 'index to address' translation. If anyone tries to use the idx
+- * directly without translation, we catch the bug with a NULL-deference
+- * kernel oops. Illegal ranges of incoming indices are caught too.
+- */
+-static __always_inline unsigned long fix_to_virt(const unsigned int idx)
+-{
+- /*
+- * this branch gets completely eliminated after inlining,
+- * except when someone tries to use fixaddr indices in an
+- * illegal way. (such as mixing up address types or using
+- * out-of-range indices).
+- *
+- * If it doesn't get removed, the linker will complain
+- * loudly with a reasonably clear error message..
+- */
+- if (idx >= __end_of_fixed_addresses)
+- __this_fixmap_does_not_exist();
+-
+- return __fix_to_virt(idx);
+-}
+-
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/highmem.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/highmem.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/highmem.h 2008-12-01 11:49:07.000000000 +0100
+@@ -74,6 +74,9 @@ struct page *kmap_atomic_to_page(void *p
+
+ #define flush_cache_kmaps() do { } while (0)
+
++extern void add_highpages_with_active_regions(int nid, unsigned long start_pfn,
++ unsigned long end_pfn);
++
+ void clear_highpage(struct page *);
+ static inline void clear_user_highpage(struct page *page, unsigned long vaddr)
+ {
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypercall.h 2008-12-01 11:36:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypercall.h 2008-12-01 11:49:07.000000000 +0100
+@@ -323,9 +323,19 @@ static inline int __must_check
+ HYPERVISOR_grant_table_op(
+ unsigned int cmd, void *uop, unsigned int count)
+ {
++ bool fixup = false;
++ int rc;
++
+ if (arch_use_lazy_mmu_mode())
+ xen_multicall_flush(false);
+- return _hypercall3(int, grant_table_op, cmd, uop, count);
++#ifdef GNTTABOP_map_grant_ref
++ if (cmd == GNTTABOP_map_grant_ref)
++#endif
++ fixup = gnttab_pre_map_adjust(cmd, uop, count);
++ rc = _hypercall3(int, grant_table_op, cmd, uop, count);
++ if (rc == 0 && fixup)
++ rc = gnttab_post_map_adjust(uop, count);
++ return rc;
+ }
+
+ static inline int __must_check
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 11:49:07.000000000 +0100
+@@ -35,7 +35,6 @@
+
+ #include <linux/types.h>
+ #include <linux/kernel.h>
+-#include <linux/version.h>
+ #include <linux/errno.h>
+ #include <xen/interface/xen.h>
+ #include <xen/interface/platform.h>
+@@ -171,6 +170,20 @@ static inline void arch_flush_lazy_mmu_m
+ }
+ #endif
+
++struct gnttab_map_grant_ref;
++bool gnttab_pre_map_adjust(unsigned int cmd, struct gnttab_map_grant_ref *,
++ unsigned int count);
++#if CONFIG_XEN_COMPAT < 0x030400
++int gnttab_post_map_adjust(const struct gnttab_map_grant_ref *, unsigned int);
++#else
++static inline int gnttab_post_map_adjust(const struct gnttab_map_grant_ref *m,
++ unsigned int count)
++{
++ BUG();
++ return -ENOSYS;
++}
++#endif
++
+ #else /* CONFIG_XEN */
+
+ static inline void xen_multicall_flush(bool ignore) {}
+@@ -179,6 +192,9 @@ static inline void xen_multicall_flush(b
+ #define xen_multi_mmu_update(...) ({ BUG(); -ENOSYS; })
+ #define xen_multi_mmuext_op(...) ({ BUG(); -ENOSYS; })
+
++#define gnttab_pre_map_adjust(...) false
++#define gnttab_post_map_adjust(...) ({ BUG(); -ENOSYS; })
++
+ #endif /* CONFIG_XEN */
+
+ #if defined(CONFIG_X86_64)
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io.h 2008-12-01 11:49:07.000000000 +0100
+@@ -3,6 +3,76 @@
+
+ #define ARCH_HAS_IOREMAP_WC
+
++#include <linux/compiler.h>
++
++/*
++ * early_ioremap() and early_iounmap() are for temporary early boot-time
++ * mappings, before the real ioremap() is functional.
++ * A boot-time mapping is currently limited to at most 16 pages.
++ */
++#ifndef __ASSEMBLY__
++extern void early_ioremap_init(void);
++extern void early_ioremap_clear(void);
++extern void early_ioremap_reset(void);
++extern void *early_ioremap(unsigned long offset, unsigned long size);
++extern void early_iounmap(void *addr, unsigned long size);
++extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
++#endif
++
++#define build_mmio_read(name, size, type, reg, barrier) \
++static inline type name(const volatile void __iomem *addr) \
++{ type ret; asm volatile("mov" size " %1,%0":reg (ret) \
++:"m" (*(volatile type __force *)addr) barrier); return ret; }
++
++#define build_mmio_write(name, size, type, reg, barrier) \
++static inline void name(type val, volatile void __iomem *addr) \
++{ asm volatile("mov" size " %0,%1": :reg (val), \
++"m" (*(volatile type __force *)addr) barrier); }
++
++build_mmio_read(readb, "b", unsigned char, "=q", :"memory")
++build_mmio_read(readw, "w", unsigned short, "=r", :"memory")
++build_mmio_read(readl, "l", unsigned int, "=r", :"memory")
++
++build_mmio_read(__readb, "b", unsigned char, "=q", )
++build_mmio_read(__readw, "w", unsigned short, "=r", )
++build_mmio_read(__readl, "l", unsigned int, "=r", )
++
++build_mmio_write(writeb, "b", unsigned char, "q", :"memory")
++build_mmio_write(writew, "w", unsigned short, "r", :"memory")
++build_mmio_write(writel, "l", unsigned int, "r", :"memory")
++
++build_mmio_write(__writeb, "b", unsigned char, "q", )
++build_mmio_write(__writew, "w", unsigned short, "r", )
++build_mmio_write(__writel, "l", unsigned int, "r", )
++
++#define readb_relaxed(a) __readb(a)
++#define readw_relaxed(a) __readw(a)
++#define readl_relaxed(a) __readl(a)
++#define __raw_readb __readb
++#define __raw_readw __readw
++#define __raw_readl __readl
++
++#define __raw_writeb __writeb
++#define __raw_writew __writew
++#define __raw_writel __writel
++
++#define mmiowb() barrier()
++
++#ifdef CONFIG_X86_64
++build_mmio_read(readq, "q", unsigned long, "=r", :"memory")
++build_mmio_read(__readq, "q", unsigned long, "=r", )
++build_mmio_write(writeq, "q", unsigned long, "r", :"memory")
++build_mmio_write(__writeq, "q", unsigned long, "r", )
++
++#define readq_relaxed(a) __readq(a)
++#define __raw_readq __readq
++#define __raw_writeq writeq
++
++/* Let people know we have them */
++#define readq readq
++#define writeq writeq
++#endif
++
+ #ifdef CONFIG_X86_32
+ # include "io_32.h"
+ #else
+@@ -19,4 +89,17 @@ extern int ioremap_check_change_attr(uns
+ unsigned long prot_val);
+ extern void __iomem *ioremap_wc(unsigned long offset, unsigned long size);
+
++/*
++ * early_ioremap() and early_iounmap() are for temporary early boot-time
++ * mappings, before the real ioremap() is functional.
++ * A boot-time mapping is currently limited to at most 16 pages.
++ */
++extern void early_ioremap_init(void);
++extern void early_ioremap_clear(void);
++extern void early_ioremap_reset(void);
++extern void *early_ioremap(unsigned long offset, unsigned long size);
++extern void early_iounmap(void *addr, unsigned long size);
++extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
++
++
+ #endif /* _ASM_X86_IO_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_32.h 2008-12-01 11:49:07.000000000 +0100
+@@ -123,6 +123,8 @@ static inline void *phys_to_virt(unsigne
+ */
+ extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size);
+ extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size);
++extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size,
++ unsigned long prot_val);
+
+ /*
+ * The default ioremap() behavior is non-cached:
+@@ -135,18 +137,6 @@ static inline void __iomem *ioremap(reso
+ extern void iounmap(volatile void __iomem *addr);
+
+ /*
+- * early_ioremap() and early_iounmap() are for temporary early boot-time
+- * mappings, before the real ioremap() is functional.
+- * A boot-time mapping is currently limited to at most 16 pages.
+- */
+-extern void early_ioremap_init(void);
+-extern void early_ioremap_clear(void);
+-extern void early_ioremap_reset(void);
+-extern void *early_ioremap(unsigned long offset, unsigned long size);
+-extern void early_iounmap(void *addr, unsigned long size);
+-extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
+-
+-/*
+ * ISA I/O bus memory addresses are 1:1 with the physical address.
+ */
+ #define isa_virt_to_bus(_x) ({ BUG(); virt_to_bus(_x); })
+@@ -162,55 +152,6 @@ extern void __iomem *fix_ioremap(unsigne
+ #define virt_to_bus(_x) phys_to_machine(__pa(_x))
+ #define bus_to_virt(_x) __va(machine_to_phys(_x))
+
+-/*
+- * readX/writeX() are used to access memory mapped devices. On some
+- * architectures the memory mapped IO stuff needs to be accessed
+- * differently. On the x86 architecture, we just read/write the
+- * memory location directly.
+- */
+-
+-static inline unsigned char readb(const volatile void __iomem *addr)
+-{
+- return *(volatile unsigned char __force *)addr;
+-}
+-
+-static inline unsigned short readw(const volatile void __iomem *addr)
+-{
+- return *(volatile unsigned short __force *)addr;
+-}
+-
+-static inline unsigned int readl(const volatile void __iomem *addr)
+-{
+- return *(volatile unsigned int __force *) addr;
+-}
+-
+-#define readb_relaxed(addr) readb(addr)
+-#define readw_relaxed(addr) readw(addr)
+-#define readl_relaxed(addr) readl(addr)
+-#define __raw_readb readb
+-#define __raw_readw readw
+-#define __raw_readl readl
+-
+-static inline void writeb(unsigned char b, volatile void __iomem *addr)
+-{
+- *(volatile unsigned char __force *)addr = b;
+-}
+-
+-static inline void writew(unsigned short b, volatile void __iomem *addr)
+-{
+- *(volatile unsigned short __force *)addr = b;
+-}
+-
+-static inline void writel(unsigned int b, volatile void __iomem *addr)
+-{
+- *(volatile unsigned int __force *)addr = b;
+-}
+-#define __raw_writeb writeb
+-#define __raw_writew writew
+-#define __raw_writel writel
+-
+-#define mmiowb()
+-
+ static inline void
+ memset_io(volatile void __iomem *addr, unsigned char val, int count)
+ {
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/io_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/io_64.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/io_64.h 2008-12-01 11:49:07.000000000 +0100
+@@ -190,6 +190,8 @@ extern void early_iounmap(void *addr, un
+ */
+ extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size);
+ extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size);
++extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size,
++ unsigned long prot_val);
+
+ /*
+ * The default ioremap() behavior is non-cached:
+@@ -220,77 +222,6 @@ extern void __iomem *fix_ioremap(unsigne
+ #define virt_to_bus(_x) phys_to_machine(__pa(_x))
+ #define bus_to_virt(_x) __va(machine_to_phys(_x))
+
+-/*
+- * readX/writeX() are used to access memory mapped devices. On some
+- * architectures the memory mapped IO stuff needs to be accessed
+- * differently. On the x86 architecture, we just read/write the
+- * memory location directly.
+- */
+-
+-static inline __u8 __readb(const volatile void __iomem *addr)
+-{
+- return *(__force volatile __u8 *)addr;
+-}
+-
+-static inline __u16 __readw(const volatile void __iomem *addr)
+-{
+- return *(__force volatile __u16 *)addr;
+-}
+-
+-static __always_inline __u32 __readl(const volatile void __iomem *addr)
+-{
+- return *(__force volatile __u32 *)addr;
+-}
+-
+-static inline __u64 __readq(const volatile void __iomem *addr)
+-{
+- return *(__force volatile __u64 *)addr;
+-}
+-
+-#define readb(x) __readb(x)
+-#define readw(x) __readw(x)
+-#define readl(x) __readl(x)
+-#define readq(x) __readq(x)
+-#define readb_relaxed(a) readb(a)
+-#define readw_relaxed(a) readw(a)
+-#define readl_relaxed(a) readl(a)
+-#define readq_relaxed(a) readq(a)
+-#define __raw_readb readb
+-#define __raw_readw readw
+-#define __raw_readl readl
+-#define __raw_readq readq
+-
+-#define mmiowb()
+-
+-static inline void __writel(__u32 b, volatile void __iomem *addr)
+-{
+- *(__force volatile __u32 *)addr = b;
+-}
+-
+-static inline void __writeq(__u64 b, volatile void __iomem *addr)
+-{
+- *(__force volatile __u64 *)addr = b;
+-}
+-
+-static inline void __writeb(__u8 b, volatile void __iomem *addr)
+-{
+- *(__force volatile __u8 *)addr = b;
+-}
+-
+-static inline void __writew(__u16 b, volatile void __iomem *addr)
+-{
+- *(__force volatile __u16 *)addr = b;
+-}
+-
+-#define writeq(val, addr) __writeq((val), (addr))
+-#define writel(val, addr) __writel((val), (addr))
+-#define writew(val, addr) __writew((val), (addr))
+-#define writeb(val, addr) __writeb((val), (addr))
+-#define __raw_writeb writeb
+-#define __raw_writew writew
+-#define __raw_writel writel
+-#define __raw_writeq writeq
+-
+ void __memcpy_fromio(void *, unsigned long, unsigned);
+ void __memcpy_toio(unsigned long, const void *, unsigned);
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/irq_vectors.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/irq_vectors.h 2008-12-01 11:49:07.000000000 +0100
+@@ -0,0 +1,52 @@
++#ifndef _ASM_IRQ_VECTORS_H
++#define _ASM_IRQ_VECTORS_H
++
++#ifdef CONFIG_X86_32
++# define SYSCALL_VECTOR 0x80
++#else
++# define IA32_SYSCALL_VECTOR 0x80
++#endif
++
++#define RESCHEDULE_VECTOR 0
++#define CALL_FUNCTION_VECTOR 1
++#define CALL_FUNC_SINGLE_VECTOR 2
++#define SPIN_UNLOCK_VECTOR 3
++#define NR_IPIS 4
++
++/*
++ * The maximum number of vectors supported by i386 processors
++ * is limited to 256. For processors other than i386, NR_VECTORS
++ * should be changed accordingly.
++ */
++#define NR_VECTORS 256
++
++#define FIRST_VM86_IRQ 3
++#define LAST_VM86_IRQ 15
++#define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15)
++
++/*
++ * The flat IRQ space is divided into two regions:
++ * 1. A one-to-one mapping of real physical IRQs. This space is only used
++ * if we have physical device-access privilege. This region is at the
++ * start of the IRQ space so that existing device drivers do not need
++ * to be modified to translate physical IRQ numbers into our IRQ space.
++ * 3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These
++ * are bound using the provided bind/unbind functions.
++ */
++
++#define PIRQ_BASE 0
++#if !defined(MAX_IO_APICS)
++# define NR_PIRQS (NR_VECTORS + 32 * NR_CPUS)
++#elif NR_CPUS < MAX_IO_APICS
++# define NR_PIRQS (NR_VECTORS + 32 * NR_CPUS)
++#else
++# define NR_PIRQS (NR_VECTORS + 32 * MAX_IO_APICS)
++#endif
++
++#define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS)
++#define NR_DYNIRQS 256
++
++#define NR_IRQS (NR_PIRQS + NR_DYNIRQS)
++#define NR_IRQ_VECTORS NR_IRQS
++
++#endif /* _ASM_IRQ_VECTORS_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/irqflags.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/irqflags.h 2008-12-01 11:49:07.000000000 +0100
+@@ -118,7 +118,7 @@ static inline void halt(void)
+
+ #ifndef CONFIG_X86_64
+ #define INTERRUPT_RETURN iret
+-#define ENABLE_INTERRUPTS_SYSCALL_RET __ENABLE_INTERRUPTS ; \
++#define ENABLE_INTERRUPTS_SYSEXIT __ENABLE_INTERRUPTS ; \
+ sysexit_scrit: /**** START OF SYSEXIT CRITICAL REGION ****/ ; \
+ __TEST_PENDING ; \
+ jnz 14f /* process more events if necessary... */ ; \
+@@ -175,18 +175,6 @@ static inline void trace_hardirqs_fixup_
+ #else
+
+ #ifdef CONFIG_X86_64
+-/*
+- * Currently paravirt can't handle swapgs nicely when we
+- * don't have a stack we can rely on (such as a user space
+- * stack). So we either find a way around these or just fault
+- * and emulate if a guest tries to call swapgs directly.
+- *
+- * Either way, this is a good way to document that we don't
+- * have a reliable stack. x86_64 only.
+- */
+-#define SWAPGS_UNSAFE_STACK swapgs
+-#define ARCH_TRACE_IRQS_ON call trace_hardirqs_on_thunk
+-#define ARCH_TRACE_IRQS_OFF call trace_hardirqs_off_thunk
+ #define ARCH_LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk
+ #define ARCH_LOCKDEP_SYS_EXIT_IRQ \
+ TRACE_IRQS_ON; \
+@@ -198,24 +186,6 @@ static inline void trace_hardirqs_fixup_
+ TRACE_IRQS_OFF;
+
+ #else
+-#define ARCH_TRACE_IRQS_ON \
+- pushl %eax; \
+- pushl %ecx; \
+- pushl %edx; \
+- call trace_hardirqs_on; \
+- popl %edx; \
+- popl %ecx; \
+- popl %eax;
+-
+-#define ARCH_TRACE_IRQS_OFF \
+- pushl %eax; \
+- pushl %ecx; \
+- pushl %edx; \
+- call trace_hardirqs_off; \
+- popl %edx; \
+- popl %ecx; \
+- popl %eax;
+-
+ #define ARCH_LOCKDEP_SYS_EXIT \
+ pushl %eax; \
+ pushl %ecx; \
+@@ -229,8 +199,8 @@ static inline void trace_hardirqs_fixup_
+ #endif
+
+ #ifdef CONFIG_TRACE_IRQFLAGS
+-# define TRACE_IRQS_ON ARCH_TRACE_IRQS_ON
+-# define TRACE_IRQS_OFF ARCH_TRACE_IRQS_OFF
++# define TRACE_IRQS_ON call trace_hardirqs_on_thunk;
++# define TRACE_IRQS_OFF call trace_hardirqs_off_thunk;
+ #else
+ # define TRACE_IRQS_ON
+ # define TRACE_IRQS_OFF
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/mmu_context.h 2008-12-01 11:36:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context.h 2008-12-01 11:49:07.000000000 +0100
+@@ -1,5 +1,42 @@
++#ifndef __ASM_X86_MMU_CONTEXT_H
++#define __ASM_X86_MMU_CONTEXT_H
++
++#include <asm/desc.h>
++#include <asm/atomic.h>
++#include <asm/pgalloc.h>
++#include <asm/tlbflush.h>
++
++void arch_exit_mmap(struct mm_struct *mm);
++void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
++
++void mm_pin(struct mm_struct *mm);
++void mm_unpin(struct mm_struct *mm);
++void mm_pin_all(void);
++
++static inline void xen_activate_mm(struct mm_struct *prev,
++ struct mm_struct *next)
++{
++ if (!PagePinned(virt_to_page(next->pgd)))
++ mm_pin(next);
++}
++
++/*
++ * Used for LDT copy/destruction.
++ */
++int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
++void destroy_context(struct mm_struct *mm);
++
+ #ifdef CONFIG_X86_32
+ # include "mmu_context_32.h"
+ #else
+ # include "mmu_context_64.h"
+ #endif
++
++#define activate_mm(prev, next) \
++do { \
++ xen_activate_mm(prev, next); \
++ switch_mm((prev), (next), NULL); \
++} while (0);
++
++
++#endif /* __ASM_X86_MMU_CONTEXT_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/mmu_context_32.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_32.h 2008-12-01 11:49:07.000000000 +0100
+@@ -1,32 +1,6 @@
+ #ifndef __I386_SCHED_H
+ #define __I386_SCHED_H
+
+-#include <asm/desc.h>
+-#include <asm/atomic.h>
+-#include <asm/pgalloc.h>
+-#include <asm/tlbflush.h>
+-
+-void arch_exit_mmap(struct mm_struct *mm);
+-void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
+-
+-void mm_pin(struct mm_struct *mm);
+-void mm_unpin(struct mm_struct *mm);
+-void mm_pin_all(void);
+-
+-static inline void xen_activate_mm(struct mm_struct *prev,
+- struct mm_struct *next)
+-{
+- if (!PagePinned(virt_to_page(next->pgd)))
+- mm_pin(next);
+-}
+-
+-/*
+- * Used for LDT copy/destruction.
+- */
+-int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
+-void destroy_context(struct mm_struct *mm);
+-
+-
+ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
+ {
+ #if 0 /* XEN: no lazy tlb */
+@@ -107,10 +81,4 @@ static inline void switch_mm(struct mm_s
+ #define deactivate_mm(tsk, mm) \
+ asm("movl %0,%%gs": :"r" (0));
+
+-#define activate_mm(prev, next) \
+-do { \
+- xen_activate_mm(prev, next); \
+- switch_mm((prev), (next), NULL); \
+-} while (0)
+-
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/mmu_context_64.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_64.h 2008-12-01 11:49:07.000000000 +0100
+@@ -1,23 +1,6 @@
+ #ifndef __X86_64_MMU_CONTEXT_H
+ #define __X86_64_MMU_CONTEXT_H
+
+-#include <asm/desc.h>
+-#include <asm/atomic.h>
+-#include <asm/pgalloc.h>
+-#include <asm/page.h>
+-#include <asm/pda.h>
+-#include <asm/pgtable.h>
+-#include <asm/tlbflush.h>
+-
+-void arch_exit_mmap(struct mm_struct *mm);
+-void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
+-
+-/*
+- * possibly do the LDT unload here?
+- */
+-int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
+-void destroy_context(struct mm_struct *mm);
+-
+ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
+ {
+ #if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
+@@ -58,10 +41,6 @@ static inline void __prepare_arch_switch
+ }
+ }
+
+-extern void mm_pin(struct mm_struct *mm);
+-extern void mm_unpin(struct mm_struct *mm);
+-void mm_pin_all(void);
+-
+ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
+ {
+@@ -124,11 +103,4 @@ do { \
+ asm volatile("movl %0,%%fs"::"r"(0)); \
+ } while (0)
+
+-static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
+-{
+- if (!PagePinned(virt_to_page(next->pgd)))
+- mm_pin(next);
+- switch_mm(prev, next, NULL);
+-}
+-
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/page.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/page.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/page.h 2008-12-01 11:49:07.000000000 +0100
+@@ -16,9 +16,9 @@
+ * below. The preprocessor will warn if the two definitions aren't identical.
+ */
+ #define _PAGE_BIT_PRESENT 0
+-#define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT)
+-#define _PAGE_BIT_IO 9
+-#define _PAGE_IO (_AC(1, L)<<_PAGE_BIT_IO)
++#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
++#define _PAGE_BIT_IO 11
++#define _PAGE_IO (_AT(pteval_t, 1) << _PAGE_BIT_IO)
+
+ #define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1)
+ #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
+@@ -28,8 +28,11 @@
+ (ie, 32-bit PAE). */
+ #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
+
+-/* PTE_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
+-#define PTE_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
++/* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
++#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
++
++/* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
++#define PTE_FLAGS_MASK (~PTE_PFN_MASK)
+
+ #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT)
+ #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1))
+@@ -39,8 +42,7 @@
+ #define HPAGE_MASK (~(HPAGE_SIZE - 1))
+ #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
+
+-/* to align the pointer to the (next) page boundary */
+-#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
++#define HUGE_MAX_HSTATE 2
+
+ #ifndef __ASSEMBLY__
+ #include <linux/types.h>
+@@ -61,9 +63,17 @@
+
+ #ifndef __ASSEMBLY__
+
++typedef struct { pgdval_t pgd; } pgd_t;
++typedef struct { pgprotval_t pgprot; } pgprot_t;
++
+ extern int page_is_ram(unsigned long pagenr);
+ extern int devmem_is_allowed(unsigned long pagenr);
++extern void map_devmem(unsigned long pfn, unsigned long size,
++ pgprot_t vma_prot);
++extern void unmap_devmem(unsigned long pfn, unsigned long size,
++ pgprot_t vma_prot);
+
++extern unsigned long max_low_pfn_mapped;
+ extern unsigned long max_pfn_mapped;
+
+ struct page;
+@@ -84,15 +94,11 @@ static inline void copy_user_page(void *
+ alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
+ #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+-typedef struct { pgprotval_t pgprot; } pgprot_t;
+-
+ #define pgprot_val(x) ((x).pgprot)
+ #define __pgprot(x) ((pgprot_t) { (x) } )
+
+ #include <asm/maddr.h>
+
+-typedef struct { pgdval_t pgd; } pgd_t;
+-
+ #define __pgd_ma(x) ((pgd_t) { (x) } )
+ static inline pgd_t xen_make_pgd(pgdval_t val)
+ {
+@@ -196,6 +202,11 @@ static inline pteval_t xen_pte_val(pte_t
+ return ret;
+ }
+
++static inline pteval_t xen_pte_flags(pte_t pte)
++{
++ return __pte_val(pte) & PTE_FLAGS_MASK;
++}
++
+ #define pgd_val(x) xen_pgd_val(x)
+ #define __pgd(x) xen_make_pgd(x)
+
+@@ -210,6 +221,7 @@ static inline pteval_t xen_pte_val(pte_t
+ #endif
+
+ #define pte_val(x) xen_pte_val(x)
++#define pte_flags(x) xen_pte_flags(x)
+ #define __pte(x) xen_make_pte(x)
+
+ #define __pa(x) __phys_addr((unsigned long)(x))
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/page_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/page_64.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/page_64.h 2008-12-01 11:49:07.000000000 +0100
+@@ -26,6 +26,12 @@
+ #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
+ #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
+
++/*
++ * Set __PAGE_OFFSET to the most negative possible address +
++ * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a
++ * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's
++ * what Xen requires.
++ */
+ #define __PAGE_OFFSET _AC(0xffff880000000000, UL)
+
+ #define __PHYSICAL_START CONFIG_PHYSICAL_START
+@@ -63,7 +69,8 @@
+ void clear_page(void *page);
+ void copy_page(void *to, void *from);
+
+-extern unsigned long end_pfn;
++/* duplicated to the one in bootmem.h */
++extern unsigned long max_pfn;
+
+ static inline unsigned long __phys_addr(unsigned long x)
+ {
+@@ -91,6 +98,11 @@ typedef union { pteval_t pte; unsigned i
+ extern unsigned long init_memory_mapping(unsigned long start,
+ unsigned long end);
+
++extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
++
++extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
++extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
++
+ #endif /* !__ASSEMBLY__ */
+
+ #ifdef CONFIG_FLATMEM
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pci.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pci.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pci.h 2008-12-01 11:49:07.000000000 +0100
+@@ -21,6 +21,8 @@ struct pci_sysdata {
+ #endif
+ };
+
++extern int pci_routeirq;
++
+ /* scan a bus after allocating a pci_sysdata for it */
+ extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
+ int node);
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pci_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pci_32.h 2008-12-01 11:36:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pci_32.h 2008-12-01 11:49:07.000000000 +0100
+@@ -38,12 +38,14 @@ struct pci_dev;
+ #define PCI_DMA_BUS_IS_PHYS (1)
+
+ /* pci_unmap_{page,single} is a nop so... */
+-#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
+-#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
+-#define pci_unmap_addr(PTR, ADDR_NAME) (0)
+-#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
+-#define pci_unmap_len(PTR, LEN_NAME) (0)
+-#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
++#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME[0];
++#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) unsigned LEN_NAME[0];
++#define pci_unmap_addr(PTR, ADDR_NAME) sizeof((PTR)->ADDR_NAME)
++#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
++ do { break; } while (pci_unmap_addr(PTR, ADDR_NAME))
++#define pci_unmap_len(PTR, LEN_NAME) sizeof((PTR)->LEN_NAME)
++#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
++ do { break; } while (pci_unmap_len(PTR, LEN_NAME))
+
+ #endif
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgalloc.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc.h 2008-12-01 11:49:07.000000000 +0100
+@@ -7,6 +7,9 @@
+
+ #include <asm/io.h> /* for phys_to_virt and page_to_pseudophys */
+
++static inline int paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }
++static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {}
++
+ static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {}
+ static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {}
+ static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn,
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable.h 2008-12-01 11:49:07.000000000 +0100
+@@ -13,11 +13,12 @@
+ #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
+ #define _PAGE_BIT_PAT 7 /* on 4KB pages */
+ #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
+-#define _PAGE_BIT_IO 9 /* Mapped page is I/O or foreign and
++#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
++#define _PAGE_BIT_UNUSED2 10
++#define _PAGE_BIT_IO 11 /* Mapped page is I/O or foreign and
+ * has no associated page struct. */
+-#define _PAGE_BIT_UNUSED2 10 /* available for programmer */
+-#define _PAGE_BIT_UNUSED3 11
+ #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
++#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
+ #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
+
+ /* If _PAGE_BIT_PRESENT is clear, we use these: */
+@@ -28,34 +29,31 @@
+ /* if the user mapped it with PROT_NONE; pte_present gives true */
+ #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
+
+-/*
+- * Note: we use _AC(1, L) instead of _AC(1, UL) so that we get a
+- * sign-extended value on 32-bit with all 1's in the upper word,
+- * which preserves the upper pte values on 64-bit ptes:
+- */
+-#define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT)
+-#define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW)
+-#define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER)
+-#define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT)
+-#define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD)
+-#define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED)
+-#define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY)
+-#define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */
+-#define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */
+-#define _PAGE_IO (_AC(1, L)<<_PAGE_BIT_IO)
+-#define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2)
+-#define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3)
+-#define _PAGE_PAT (_AC(1, L)<<_PAGE_BIT_PAT)
+-#define _PAGE_PAT_LARGE (_AC(1, L)<<_PAGE_BIT_PAT_LARGE)
++#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
++#define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
++#define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
++#define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
++#define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
++#define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
++#define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
++#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
++#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
++#define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
++#define _PAGE_UNUSED2 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED2)
++#define _PAGE_IO (_AT(pteval_t, 1) << _PAGE_BIT_IO)
++#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
++#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
++#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
++#define __HAVE_ARCH_PTE_SPECIAL
+
+ #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
+-#define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX)
++#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
+ #else
+-#define _PAGE_NX 0
++#define _PAGE_NX (_AT(pteval_t, 0))
+ #endif
+
+-#define _PAGE_FILE (_AC(1, L)<<_PAGE_BIT_FILE)
+-#define _PAGE_PROTNONE (_AC(1, L)<<_PAGE_BIT_PROTNONE)
++#define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
++#define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
+
+ #ifndef __ASSEMBLY__
+ #if defined(CONFIG_X86_64) && CONFIG_XEN_COMPAT <= 0x030002
+@@ -71,8 +69,8 @@ extern unsigned int __kernel_page_user;
+ _PAGE_DIRTY | __kernel_page_user)
+
+ /* Set of bits not changed in pte_modify */
+-#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_CACHE_MASK | _PAGE_IO | \
+- _PAGE_ACCESSED | _PAGE_DIRTY)
++#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_CACHE_MASK | _PAGE_IO | \
++ _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
+
+ /*
+ * PAT settings are part of the hypervisor interface, which sets the
+@@ -102,19 +100,9 @@ extern unsigned int __kernel_page_user;
+ #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
+ _PAGE_ACCESSED)
+
+-#ifdef CONFIG_X86_32
+-#define _PAGE_KERNEL_EXEC \
+- (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
+-#define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX)
+-
+-#ifndef __ASSEMBLY__
+-extern pteval_t __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
+-#endif /* __ASSEMBLY__ */
+-#else
+ #define __PAGE_KERNEL_EXEC \
+ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | __kernel_page_user)
+ #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
+-#endif
+
+ #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
+ #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
+@@ -125,25 +113,22 @@ extern pteval_t __PAGE_KERNEL, __PAGE_KE
+ #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
+ #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
+ #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
++#define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
+ #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
+
+-/*
+- * We don't support GLOBAL page in xenolinux64
+- */
+-#define MAKE_GLOBAL(x) __pgprot((x))
+-
+-#define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL)
+-#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
+-#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
+-#define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX)
+-#define PAGE_KERNEL_WC MAKE_GLOBAL(__PAGE_KERNEL_WC)
+-#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
+-#define PAGE_KERNEL_UC_MINUS MAKE_GLOBAL(__PAGE_KERNEL_UC_MINUS)
+-#define PAGE_KERNEL_EXEC_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_EXEC_NOCACHE)
+-#define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE)
+-#define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC)
+-#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
+-#define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE)
++#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
++#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
++#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
++#define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
++#define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC)
++#define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
++#define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS)
++#define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
++#define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
++#define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
++#define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
++#define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
++#define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
+
+ /* xwr */
+ #define __P000 PAGE_NONE
+@@ -182,27 +167,27 @@ extern struct list_head pgd_list;
+ */
+ static inline int pte_dirty(pte_t pte)
+ {
+- return __pte_val(pte) & _PAGE_DIRTY;
++ return pte_flags(pte) & _PAGE_DIRTY;
+ }
+
+ static inline int pte_young(pte_t pte)
+ {
+- return __pte_val(pte) & _PAGE_ACCESSED;
++ return pte_flags(pte) & _PAGE_ACCESSED;
+ }
+
+ static inline int pte_write(pte_t pte)
+ {
+- return __pte_val(pte) & _PAGE_RW;
++ return pte_flags(pte) & _PAGE_RW;
+ }
+
+ static inline int pte_file(pte_t pte)
+ {
+- return __pte_val(pte) & _PAGE_FILE;
++ return pte_flags(pte) & _PAGE_FILE;
+ }
+
+ static inline int pte_huge(pte_t pte)
+ {
+- return __pte_val(pte) & _PAGE_PSE;
++ return pte_flags(pte) & _PAGE_PSE;
+ }
+
+ static inline int pte_global(pte_t pte)
+@@ -212,12 +197,12 @@ static inline int pte_global(pte_t pte)
+
+ static inline int pte_exec(pte_t pte)
+ {
+- return !(__pte_val(pte) & _PAGE_NX);
++ return !(pte_flags(pte) & _PAGE_NX);
+ }
+
+ static inline int pte_special(pte_t pte)
+ {
+- return 0;
++ return pte_flags(pte) & _PAGE_SPECIAL;
+ }
+
+ static inline int pmd_large(pmd_t pte)
+@@ -228,22 +213,22 @@ static inline int pmd_large(pmd_t pte)
+
+ static inline pte_t pte_mkclean(pte_t pte)
+ {
+- return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_DIRTY);
++ return __pte_ma(__pte_val(pte) & ~_PAGE_DIRTY);
+ }
+
+ static inline pte_t pte_mkold(pte_t pte)
+ {
+- return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED);
++ return __pte_ma(__pte_val(pte) & ~_PAGE_ACCESSED);
+ }
+
+ static inline pte_t pte_wrprotect(pte_t pte)
+ {
+- return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_RW);
++ return __pte_ma(__pte_val(pte) & ~_PAGE_RW);
+ }
+
+ static inline pte_t pte_mkexec(pte_t pte)
+ {
+- return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_NX);
++ return __pte_ma(__pte_val(pte) & ~_PAGE_NX);
+ }
+
+ static inline pte_t pte_mkdirty(pte_t pte)
+@@ -268,7 +253,7 @@ static inline pte_t pte_mkhuge(pte_t pte
+
+ static inline pte_t pte_clrhuge(pte_t pte)
+ {
+- return __pte_ma(__pte_val(pte) & ~(pteval_t)_PAGE_PSE);
++ return __pte_ma(__pte_val(pte) & ~_PAGE_PSE);
+ }
+
+ static inline pte_t pte_mkglobal(pte_t pte)
+@@ -283,35 +268,46 @@ static inline pte_t pte_clrglobal(pte_t
+
+ static inline pte_t pte_mkspecial(pte_t pte)
+ {
+- return pte;
++ return __pte_ma(__pte_val(pte) | _PAGE_SPECIAL);
+ }
+
+ extern pteval_t __supported_pte_mask;
+
+ static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
+ {
+- return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) |
+- pgprot_val(pgprot)) & __supported_pte_mask);
++ pgprotval_t prot = pgprot_val(pgprot);
++
++ if (prot & _PAGE_PRESENT)
++ prot &= __supported_pte_mask;
++ return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | prot);
+ }
+
+ static inline pte_t pfn_pte_ma(unsigned long page_nr, pgprot_t pgprot)
+ {
+- return __pte_ma((((phys_addr_t)page_nr << PAGE_SHIFT) |
+- pgprot_val(pgprot)) & __supported_pte_mask);
++ pgprotval_t prot = pgprot_val(pgprot);
++
++ if (prot & _PAGE_PRESENT)
++ prot &= __supported_pte_mask;
++ return __pte_ma(((phys_addr_t)page_nr << PAGE_SHIFT) | prot);
+ }
+
+ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
+ {
+- return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) |
+- pgprot_val(pgprot)) & __supported_pte_mask);
++ pgprotval_t prot = pgprot_val(pgprot);
++
++ if (prot & _PAGE_PRESENT)
++ prot &= __supported_pte_mask;
++ return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | prot);
+ }
+
+ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+ {
+- pteval_t val = pte_val(pte);
++ pgprotval_t prot = pgprot_val(newprot);
++ pteval_t val = pte_val(pte) & _PAGE_CHG_MASK;
+
+- val &= _PAGE_CHG_MASK;
+- val |= pgprot_val(newprot) & (~_PAGE_CHG_MASK) & __supported_pte_mask;
++ if (prot & _PAGE_PRESENT)
++ prot &= __supported_pte_mask;
++ val |= prot & ~_PAGE_CHG_MASK;
+
+ return __pte(val);
+ }
+@@ -325,9 +321,11 @@ static inline pgprot_t pgprot_modify(pgp
+ return __pgprot(preservebits | addbits);
+ }
+
+-#define pte_pgprot(x) __pgprot(__pte_val(x) & ~PTE_MASK)
++#define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK)
+
+-#define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask)
++#define canon_pgprot(p) __pgprot(pgprot_val(p) & _PAGE_PRESENT \
++ ? pgprot_val(p) & __supported_pte_mask \
++ : pgprot_val(p))
+
+ #ifndef __ASSEMBLY__
+ #define __HAVE_PHYS_MEM_ACCESS_PROT
+@@ -338,6 +336,17 @@ int phys_mem_access_prot_allowed(struct
+ unsigned long size, pgprot_t *vma_prot);
+ #endif
+
++/* Install a pte for a particular vaddr in kernel space. */
++void set_pte_vaddr(unsigned long vaddr, pte_t pte);
++
++#ifndef CONFIG_XEN
++extern void native_pagetable_setup_start(pgd_t *base);
++extern void native_pagetable_setup_done(pgd_t *base);
++#else
++static inline void xen_pagetable_setup_start(pgd_t *base) {}
++static inline void xen_pagetable_setup_done(pgd_t *base) {}
++#endif
++
+ #define set_pte(ptep, pte) xen_set_pte(ptep, pte)
+ #define set_pte_at(mm, addr, ptep, pte) xen_set_pte_at(mm, addr, ptep, pte)
+
+@@ -373,6 +382,26 @@ int phys_mem_access_prot_allowed(struct
+ # include "pgtable_64.h"
+ #endif
+
++/*
++ * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
++ *
++ * this macro returns the index of the entry in the pgd page which would
++ * control the given virtual address
++ */
++#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
++
++/*
++ * pgd_offset() returns a (pgd_t *)
++ * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
++ */
++#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
++/*
++ * a shortcut which implies the use of the kernel's pgd, instead
++ * of a process's
++ */
++#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
++
++
+ #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
+ #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
+
+@@ -383,8 +412,15 @@ enum {
+ PG_LEVEL_4K,
+ PG_LEVEL_2M,
+ PG_LEVEL_1G,
++ PG_LEVEL_NUM
+ };
+
++#ifdef CONFIG_PROC_FS
++extern void update_page_count(int level, unsigned long pages);
++#else
++static inline void update_page_count(int level, unsigned long pages) { }
++#endif
++
+ /*
+ * Helper function that returns the kernel pagetable entry controlling
+ * the virtual address 'address'. NULL means no pagetable entry present.
+@@ -441,6 +477,8 @@ static inline void xen_pte_clear(struct
+ * race with other CPU's that might be updating the dirty
+ * bit at the same time.
+ */
++struct vm_area_struct;
++
+ #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+ extern int ptep_set_access_flags(struct vm_area_struct *vma,
+ unsigned long address, pte_t *ptep,
+@@ -523,9 +561,6 @@ static inline void clone_pgd_range(pgd_t
+ memcpy(dst, src, count * sizeof(pgd_t));
+ }
+
+-#define arch_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable) \
+- xen_change_pte_range(mm, pmd, addr, end, newprot, dirty_accountable)
+-
+ #define arbitrary_virt_to_machine(va) \
+ ({ \
+ unsigned int __lvl; \
+@@ -535,6 +570,44 @@ static inline void clone_pgd_range(pgd_t
+ | ((unsigned long)(va) & (PAGE_SIZE - 1))); \
+ })
+
++#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
++static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr,
++ pte_t *ptep)
++{
++#if CONFIG_XEN_COMPAT < 0x030300
++ if (unlikely(!xen_feature(XENFEAT_mmu_pt_update_preserve_ad)))
++ return ptep_get_and_clear(mm, addr, ptep);
++#endif
++ return *ptep;
++}
++
++#ifdef CONFIG_HIGHPTE
++extern void *high_memory;
++#endif
++
++static inline void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
++ pte_t *ptep, pte_t pte)
++{
++ mmu_update_t u;
++
++#if CONFIG_XEN_COMPAT < 0x030300
++ if (unlikely(!xen_feature(XENFEAT_mmu_pt_update_preserve_ad))) {
++ set_pte_at(mm, addr, ptep, pte);
++ return;
++ }
++#endif
++#ifdef CONFIG_HIGHPTE
++ if ((void *)ptep > high_memory)
++ u.ptr = arbitrary_virt_to_machine(ptep)
++ | MMU_PT_UPDATE_PRESERVE_AD;
++ else
++#endif
++ u.ptr = virt_to_machine(ptep) | MMU_PT_UPDATE_PRESERVE_AD;
++ u.val = __pte_val(pte);
++ if (HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF))
++ BUG();
++}
++
+ #include <asm-generic/pgtable.h>
+
+ #include <xen/features.h>
+@@ -563,10 +636,6 @@ int touch_pte_range(struct mm_struct *mm
+ unsigned long address,
+ unsigned long size);
+
+-int xen_change_pte_range(struct mm_struct *mm, pmd_t *pmd,
+- unsigned long addr, unsigned long end, pgprot_t newprot,
+- int dirty_accountable);
+-
+ #endif /* __ASSEMBLY__ */
+
+ #endif /* _ASM_X86_PGTABLE_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 11:49:07.000000000 +0100
+@@ -14,11 +14,11 @@
+ #define pmd_ERROR(e) \
+ printk("%s:%d: bad pmd %p(%016Lx pfn %08Lx).\n", \
+ __FILE__, __LINE__, &(e), __pmd_val(e), \
+- (pmd_val(e) & PTE_MASK) >> PAGE_SHIFT)
++ (pmd_val(e) & PTE_PFN_MASK) >> PAGE_SHIFT)
+ #define pgd_ERROR(e) \
+ printk("%s:%d: bad pgd %p(%016Lx pfn %08Lx).\n", \
+ __FILE__, __LINE__, &(e), __pgd_val(e), \
+- (pgd_val(e) & PTE_MASK) >> PAGE_SHIFT)
++ (pgd_val(e) & PTE_PFN_MASK) >> PAGE_SHIFT)
+
+ static inline int pud_none(pud_t pud)
+ {
+@@ -27,7 +27,7 @@ static inline int pud_none(pud_t pud)
+ }
+ static inline int pud_bad(pud_t pud)
+ {
+- return (__pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER)) != 0;
++ return (__pud_val(pud) & ~(PTE_PFN_MASK | _KERNPG_TABLE | _PAGE_USER)) != 0;
+ }
+
+ static inline int pud_present(pud_t pud)
+@@ -102,9 +102,9 @@ static inline void pud_clear(pud_t *pudp
+ xen_tlb_flush();
+ }
+
+-#define pud_page(pud) ((struct page *) __va(pud_val(pud) & PTE_MASK))
++#define pud_page(pud) ((struct page *) __va(pud_val(pud) & PTE_PFN_MASK))
+
+-#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PTE_MASK))
++#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PTE_PFN_MASK))
+
+
+ /* Find an entry in the second-level page table.. */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_32.h 2008-12-01 11:49:07.000000000 +0100
+@@ -89,10 +89,10 @@ extern unsigned long pg0[];
+ /* pmd_present doesn't just test the _PAGE_PRESENT bit since wr.p.t.
+ can temporarily clear it. */
+ #define pmd_present(x) (__pmd_val(x))
+-#define pmd_bad(x) ((__pmd_val(x) & (~PTE_MASK & ~_PAGE_USER & ~_PAGE_PRESENT)) != (_KERNPG_TABLE & ~_PAGE_PRESENT))
++#define pmd_bad(x) ((__pmd_val(x) & (PTE_FLAGS_MASK & ~_PAGE_USER & ~_PAGE_PRESENT)) != (_KERNPG_TABLE & ~_PAGE_PRESENT))
+ #else
+ #define pmd_present(x) (__pmd_val(x) & _PAGE_PRESENT)
+-#define pmd_bad(x) ((__pmd_val(x) & (~PTE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
++#define pmd_bad(x) ((__pmd_val(x) & (PTE_FLAGS_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
+ #endif
+
+
+@@ -119,26 +119,6 @@ extern unsigned long pg0[];
+ */
+ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+
+-/*
+- * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
+- *
+- * this macro returns the index of the entry in the pgd page which would
+- * control the given virtual address
+- */
+-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
+-#define pgd_index_k(addr) pgd_index((addr))
+-
+-/*
+- * pgd_offset() returns a (pgd_t *)
+- * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
+- */
+-#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
+-
+-/*
+- * a shortcut which implies the use of the kernel's pgd, instead
+- * of a process's
+- */
+-#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
+
+ static inline int pud_large(pud_t pud) { return 0; }
+
+@@ -165,7 +145,7 @@ static inline int pud_large(pud_t pud) {
+ #define pmd_page(pmd) (pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT))
+
+ #define pmd_page_vaddr(pmd) \
+- ((unsigned long)__va(pmd_val((pmd)) & PTE_MASK))
++ ((unsigned long)__va(pmd_val((pmd)) & PTE_PFN_MASK))
+
+ #if defined(CONFIG_HIGHPTE)
+ #define pte_offset_map(dir, address) \
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:49:07.000000000 +0100
+@@ -23,6 +23,8 @@ extern void xen_init_pt(void);
+ extern pud_t level3_kernel_pgt[512];
+ extern pud_t level3_ident_pgt[512];
+ extern pmd_t level2_kernel_pgt[512];
++extern pmd_t level2_fixmap_pgt[512];
++extern pmd_t level2_ident_pgt[512];
+ extern pgd_t init_level4_pgt[];
+
+ #define swapper_pg_dir init_level4_pgt
+@@ -79,6 +81,9 @@ extern void paging_init(void);
+
+ struct mm_struct;
+
++void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte);
++
++
+ #define __xen_pte_clear(ptep) xen_set_pte(ptep, __pte(0))
+
+ static inline void xen_set_pte(pte_t *ptep, pte_t pte)
+@@ -150,24 +155,24 @@ static inline void xen_pgd_clear(pgd_t *
+ #define VMALLOC_END _AC(0xffffe1ffffffffff, UL)
+ #define VMEMMAP_START _AC(0xffffe20000000000, UL)
+ #define MODULES_VADDR _AC(0xffffffffa0000000, UL)
+-#define MODULES_END _AC(0xfffffffffff00000, UL)
++#define MODULES_END _AC(0xffffffffff000000, UL)
+ #define MODULES_LEN (MODULES_END - MODULES_VADDR)
+
+ #ifndef __ASSEMBLY__
+
+ static inline int pgd_bad(pgd_t pgd)
+ {
+- return (__pgd_val(pgd) & ~(PTE_MASK | _PAGE_USER)) != _KERNPG_TABLE;
++ return (__pgd_val(pgd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+ }
+
+ static inline int pud_bad(pud_t pud)
+ {
+- return (__pud_val(pud) & ~(PTE_MASK | _PAGE_USER)) != _KERNPG_TABLE;
++ return (__pud_val(pud) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+ }
+
+ static inline int pmd_bad(pmd_t pmd)
+ {
+- return (__pmd_val(pmd) & ~(PTE_MASK | _PAGE_USER)) != _KERNPG_TABLE;
++ return (__pmd_val(pmd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
+ }
+
+ #define pte_none(x) (!(x).pte)
+@@ -175,7 +180,7 @@ static inline int pmd_bad(pmd_t pmd)
+
+ #define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT)) /* FIXME: is this right? */
+
+-#define __pte_mfn(_pte) (((_pte).pte & PTE_MASK) >> PAGE_SHIFT)
++#define __pte_mfn(_pte) (((_pte).pte & PTE_PFN_MASK) >> PAGE_SHIFT)
+ #define pte_mfn(_pte) ((_pte).pte & _PAGE_PRESENT ? \
+ __pte_mfn(_pte) : pfn_to_mfn(__pte_mfn(_pte)))
+ #define pte_pfn(_pte) ((_pte).pte & _PAGE_IO ? max_mapnr : \
+@@ -200,11 +205,8 @@ static inline int pmd_bad(pmd_t pmd)
+ * Level 4 access.
+ */
+ #define pgd_page_vaddr(pgd) \
+- ((unsigned long)__va((unsigned long)pgd_val((pgd)) & PTE_MASK))
++ ((unsigned long)__va((unsigned long)pgd_val((pgd)) & PTE_PFN_MASK))
+ #define pgd_page(pgd) (pfn_to_page(pgd_val((pgd)) >> PAGE_SHIFT))
+-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
+-#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
+-#define pgd_offset_k(address) (init_level4_pgt + pgd_index((address)))
+ #define pgd_present(pgd) (__pgd_val(pgd) & _PAGE_PRESENT)
+ static inline int pgd_large(pgd_t pgd) { return 0; }
+ #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
+@@ -226,7 +228,7 @@ static inline int pud_large(pud_t pte)
+ }
+
+ /* PMD - Level 2 access */
+-#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val((pmd)) & PTE_MASK))
++#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val((pmd)) & PTE_PFN_MASK))
+ #define pmd_page(pmd) (pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT))
+
+ #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/processor.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/processor.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/processor.h 2008-12-01 11:49:07.000000000 +0100
+@@ -134,7 +134,7 @@ extern __u32 cleared_cpu_caps[NCAPINTS
+ #ifdef CONFIG_SMP
+ DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
+ #define cpu_data(cpu) per_cpu(cpu_info, cpu)
+-#define current_cpu_data cpu_data(smp_processor_id())
++#define current_cpu_data __get_cpu_var(cpu_info)
+ #else
+ #define cpu_data(cpu) boot_cpu_data
+ #define current_cpu_data boot_cpu_data
+@@ -153,7 +153,7 @@ static inline int hlt_works(int cpu)
+
+ extern void cpu_detect(struct cpuinfo_x86 *c);
+
+-extern void identify_cpu(struct cpuinfo_x86 *);
++extern void early_cpu_init(void);
+ extern void identify_boot_cpu(void);
+ extern void identify_secondary_cpu(struct cpuinfo_x86 *);
+ extern void print_cpu_info(struct cpuinfo_x86 *);
+@@ -267,15 +267,11 @@ struct tss_struct {
+ struct thread_struct *io_bitmap_owner;
+
+ /*
+- * Pad the TSS to be cacheline-aligned (size is 0x100):
+- */
+- unsigned long __cacheline_filler[35];
+- /*
+ * .. and then another 0x100 bytes for the emergency kernel stack:
+ */
+ unsigned long stack[64];
+
+-} __attribute__((packed));
++} ____cacheline_aligned;
+
+ DECLARE_PER_CPU(struct tss_struct, init_tss);
+
+@@ -668,11 +664,36 @@ static inline void __sti_mwait(unsigned
+
+ extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
+
+-extern int force_mwait;
+-
+ extern void select_idle_routine(const struct cpuinfo_x86 *c);
+
+ extern unsigned long boot_option_idle_override;
++extern unsigned long idle_halt;
++extern unsigned long idle_nomwait;
++
++#ifndef CONFIG_XEN
++/*
++ * on systems with caches, caches must be flashed as the absolute
++ * last instruction before going into a suspended halt. Otherwise,
++ * dirty data can linger in the cache and become stale on resume,
++ * leading to strange errors.
++ *
++ * perform a variety of operations to guarantee that the compiler
++ * will not reorder instructions. wbinvd itself is serializing
++ * so the processor will not reorder.
++ *
++ * Systems without cache can just go into halt.
++ */
++static inline void wbinvd_halt(void)
++{
++ mb();
++ /* check for clflush to determine if wbinvd is legal */
++ if (cpu_has_clflush)
++ asm volatile("cli; wbinvd; 1: hlt; jmp 1b" : : : "memory");
++ else
++ while (1)
++ halt();
++}
++#endif
+
+ extern void enable_sep_cpu(void);
+ extern int sysenter_setup(void);
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/segment.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/segment.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/segment.h 2008-12-01 11:49:07.000000000 +0100
+@@ -1,6 +1,15 @@
+ #ifndef _ASM_X86_SEGMENT_H_
+ #define _ASM_X86_SEGMENT_H_
+
++/* Constructor for a conventional segment GDT (or LDT) entry */
++/* This is a macro so it can be used in initializers */
++#define GDT_ENTRY(flags, base, limit) \
++ ((((base) & 0xff000000ULL) << (56-24)) | \
++ (((flags) & 0x0000f0ffULL) << 40) | \
++ (((limit) & 0x000f0000ULL) << (48-16)) | \
++ (((base) & 0x00ffffffULL) << 16) | \
++ (((limit) & 0x0000ffffULL)))
++
+ /* Simple and small GDT entries for booting only */
+
+ #define GDT_ENTRY_BOOT_CS 2
+@@ -61,18 +70,14 @@
+ #define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
+
+ #define GDT_ENTRY_DEFAULT_USER_CS 14
+-#define __USER_CS (GDT_ENTRY_DEFAULT_USER_CS * 8 + 3)
+
+ #define GDT_ENTRY_DEFAULT_USER_DS 15
+-#define __USER_DS (GDT_ENTRY_DEFAULT_USER_DS * 8 + 3)
+
+ #define GDT_ENTRY_KERNEL_BASE 12
+
+ #define GDT_ENTRY_KERNEL_CS (GDT_ENTRY_KERNEL_BASE + 0)
+-#define __KERNEL_CS (GDT_ENTRY_KERNEL_CS * 8)
+
+ #define GDT_ENTRY_KERNEL_DS (GDT_ENTRY_KERNEL_BASE + 1)
+-#define __KERNEL_DS (GDT_ENTRY_KERNEL_DS * 8)
+
+ #define GDT_ENTRY_TSS (GDT_ENTRY_KERNEL_BASE + 4)
+ #define GDT_ENTRY_LDT (GDT_ENTRY_KERNEL_BASE + 5)
+@@ -143,10 +148,11 @@
+ #else
+ #include <asm/cache.h>
+
+-#define __KERNEL_CS 0x10
+-#define __KERNEL_DS 0x18
++#define GDT_ENTRY_KERNEL32_CS 1
++#define GDT_ENTRY_KERNEL_CS 2
++#define GDT_ENTRY_KERNEL_DS 3
+
+-#define __KERNEL32_CS 0x08
++#define __KERNEL32_CS (GDT_ENTRY_KERNEL32_CS * 8)
+
+ /*
+ * we cannot use the same code segment descriptor for user and kernel
+@@ -154,10 +160,10 @@
+ * The segment offset needs to contain a RPL. Grr. -AK
+ * GDT layout to get 64bit syscall right (sysret hardcodes gdt offsets)
+ */
+-
+-#define __USER32_CS 0x23 /* 4*8+3 */
+-#define __USER_DS 0x2b /* 5*8+3 */
+-#define __USER_CS 0x33 /* 6*8+3 */
++#define GDT_ENTRY_DEFAULT_USER32_CS 4
++#define GDT_ENTRY_DEFAULT_USER_DS 5
++#define GDT_ENTRY_DEFAULT_USER_CS 6
++#define __USER32_CS (GDT_ENTRY_DEFAULT_USER32_CS * 8 + 3)
+ #define __USER32_DS __USER_DS
+
+ #define GDT_ENTRY_TSS 8 /* needs two entries */
+@@ -179,6 +185,11 @@
+
+ #endif
+
++#define __KERNEL_CS (GDT_ENTRY_KERNEL_CS * 8)
++#define __KERNEL_DS (GDT_ENTRY_KERNEL_DS * 8)
++#define __USER_DS (GDT_ENTRY_DEFAULT_USER_DS* 8 + 3)
++#define __USER_CS (GDT_ENTRY_DEFAULT_USER_CS* 8 + 3)
++
+ /* User mode is privilege level 3 */
+ #define USER_RPL 0x3
+ /* LDT segment has TI set, GDT has it cleared */
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/smp.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/smp.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/smp.h 2008-12-01 11:49:07.000000000 +0100
+@@ -25,23 +25,16 @@ extern cpumask_t cpu_initialized;
+ extern void (*mtrr_hook)(void);
+ extern void zap_low_mappings(void);
+
++extern int __cpuinit get_local_pda(int cpu);
++
+ extern int smp_num_siblings;
+ extern unsigned int num_processors;
+ extern cpumask_t cpu_initialized;
+
+-#if defined(CONFIG_SMP) && !defined(CONFIG_XEN)
+-extern u16 x86_cpu_to_apicid_init[];
+-extern u16 x86_bios_cpu_apicid_init[];
+-extern void *x86_cpu_to_apicid_early_ptr;
+-extern void *x86_bios_cpu_apicid_early_ptr;
+-#else
+-#define x86_cpu_to_apicid_early_ptr NULL
+-#define x86_bios_cpu_apicid_early_ptr NULL
+-#endif
+-
+ DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
+ DECLARE_PER_CPU(cpumask_t, cpu_core_map);
+ DECLARE_PER_CPU(u16, cpu_llc_id);
++
+ DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
+ DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
+
+@@ -63,9 +56,9 @@ struct smp_ops {
+
+ void (*smp_send_stop)(void);
+ void (*smp_send_reschedule)(int cpu);
+- int (*smp_call_function_mask)(cpumask_t mask,
+- void (*func)(void *info), void *info,
+- int wait);
++
++ void (*send_call_func_ipi)(cpumask_t mask);
++ void (*send_call_func_single_ipi)(int cpu);
+ };
+
+ /* Globals due to paravirt */
+@@ -106,11 +99,14 @@ static inline void smp_send_reschedule(i
+ smp_ops.smp_send_reschedule(cpu);
+ }
+
+-static inline int smp_call_function_mask(cpumask_t mask,
+- void (*func) (void *info), void *info,
+- int wait)
++static inline void arch_send_call_function_single_ipi(int cpu)
+ {
+- return smp_ops.smp_call_function_mask(mask, func, info, wait);
++ smp_ops.send_call_func_single_ipi(cpu);
++}
++
++static inline void arch_send_call_function_ipi(cpumask_t mask)
++{
++ smp_ops.send_call_func_ipi(mask);
+ }
+
+ void native_smp_prepare_boot_cpu(void);
+@@ -122,23 +118,19 @@ int native_cpu_up(unsigned int cpunum);
+
+ void xen_smp_send_stop(void);
+ void xen_smp_send_reschedule(int cpu);
+-int xen_smp_call_function_mask(cpumask_t mask,
+- void (*func) (void *info), void *info,
+- int wait);
++void xen_send_call_func_ipi(cpumask_t mask);
++void xen_send_call_func_single_ipi(int cpu);
+
+ #define smp_send_stop xen_smp_send_stop
+ #define smp_send_reschedule xen_smp_send_reschedule
+-#define smp_call_function_mask xen_smp_call_function_mask
+-
+-extern void prefill_possible_map(void);
++#define arch_send_call_function_single_ipi xen_send_call_func_single_ipi
++#define arch_send_call_function_ipi xen_send_call_func_ipi
+
+ #endif /* CONFIG_XEN */
+
+ extern int __cpu_disable(void);
+ extern void __cpu_die(unsigned int cpu);
+
+-extern void prefill_possible_map(void);
+-
+ void smp_store_cpu_info(int id);
+ #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
+
+@@ -149,6 +141,14 @@ static inline int num_booting_cpus(void)
+ }
+ #endif /* CONFIG_SMP */
+
++#if defined(CONFIG_SMP) && (defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_XEN))
++extern void prefill_possible_map(void);
++#else
++static inline void prefill_possible_map(void)
++{
++}
++#endif
++
+ extern unsigned disabled_cpus __cpuinitdata;
+
+ #ifdef CONFIG_X86_32_SMP
+@@ -216,12 +216,8 @@ static inline int hard_smp_processor_id(
+ #endif /* CONFIG_X86_LOCAL_APIC */
+
+ #ifdef CONFIG_HOTPLUG_CPU
+-extern void cpu_exit_clear(void);
+ extern void cpu_uninit(void);
+ #endif
+
+-extern void smp_alloc_memory(void);
+-extern void lock_ipi_call_lock(void);
+-extern void unlock_ipi_call_lock(void);
+ #endif /* __ASSEMBLY__ */
+ #endif
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/spinlock.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/spinlock.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/spinlock.h 2008-12-01 11:49:07.000000000 +0100
+@@ -65,14 +65,14 @@ extern void xen_spin_kick(raw_spinlock_t
+ */
+ #if (NR_CPUS < 256)
+ #define TICKET_SHIFT 8
+-#define __raw_spin_lock_preamble \
++#define __ticket_spin_lock_preamble \
+ asm(LOCK_PREFIX "xaddw %w0, %2\n\t" \
+ "cmpb %h0, %b0\n\t" \
+ "sete %1" \
+ : "=&Q" (token), "=qm" (free), "+m" (lock->slock) \
+ : "0" (0x0100) \
+ : "memory", "cc")
+-#define __raw_spin_lock_body \
++#define __ticket_spin_lock_body \
+ asm("1:\t" \
+ "cmpb %h0, %b0\n\t" \
+ "je 2f\n\t" \
+@@ -88,7 +88,7 @@ extern void xen_spin_kick(raw_spinlock_t
+ : "memory", "cc")
+
+
+-static __always_inline int __raw_spin_trylock(raw_spinlock_t *lock)
++static __always_inline int __ticket_spin_trylock(raw_spinlock_t *lock)
+ {
+ int tmp, new;
+
+@@ -107,7 +107,7 @@ static __always_inline int __raw_spin_tr
+ return tmp;
+ }
+
+-static __always_inline void __raw_spin_unlock(raw_spinlock_t *lock)
++static __always_inline void __ticket_spin_unlock(raw_spinlock_t *lock)
+ {
+ unsigned int token;
+ unsigned char kick;
+@@ -124,7 +124,7 @@ static __always_inline void __raw_spin_u
+ }
+ #else
+ #define TICKET_SHIFT 16
+-#define __raw_spin_lock_preamble \
++#define __ticket_spin_lock_preamble \
+ do { \
+ unsigned int tmp; \
+ asm(LOCK_PREFIX "xaddl %0, %2\n\t" \
+@@ -136,7 +136,7 @@ static __always_inline void __raw_spin_u
+ : "0" (0x00010000) \
+ : "memory", "cc"); \
+ } while (0)
+-#define __raw_spin_lock_body \
++#define __ticket_spin_lock_body \
+ do { \
+ unsigned int tmp; \
+ asm("shldl $16, %0, %2\n" \
+@@ -155,7 +155,7 @@ static __always_inline void __raw_spin_u
+ : "memory", "cc"); \
+ } while (0)
+
+-static __always_inline int __raw_spin_trylock(raw_spinlock_t *lock)
++static __always_inline int __ticket_spin_trylock(raw_spinlock_t *lock)
+ {
+ int tmp;
+ int new;
+@@ -177,7 +177,7 @@ static __always_inline int __raw_spin_tr
+ return tmp;
+ }
+
+-static __always_inline void __raw_spin_unlock(raw_spinlock_t *lock)
++static __always_inline void __ticket_spin_unlock(raw_spinlock_t *lock)
+ {
+ unsigned int token, tmp;
+ bool kick;
+@@ -195,49 +195,145 @@ static __always_inline void __raw_spin_u
+ }
+ #endif
+
+-static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
++static inline int __ticket_spin_is_locked(raw_spinlock_t *lock)
+ {
+ int tmp = ACCESS_ONCE(lock->slock);
+
+ return !!(((tmp >> TICKET_SHIFT) ^ tmp) & ((1 << TICKET_SHIFT) - 1));
+ }
+
+-static inline int __raw_spin_is_contended(raw_spinlock_t *lock)
++static inline int __ticket_spin_is_contended(raw_spinlock_t *lock)
+ {
+ int tmp = ACCESS_ONCE(lock->slock);
+
+ return (((tmp >> TICKET_SHIFT) - tmp) & ((1 << TICKET_SHIFT) - 1)) > 1;
+ }
+
+-static __always_inline void __raw_spin_lock(raw_spinlock_t *lock)
++static __always_inline void __ticket_spin_lock(raw_spinlock_t *lock)
+ {
+ unsigned int token, count;
+ bool free;
+
+- __raw_spin_lock_preamble;
++ __ticket_spin_lock_preamble;
+ if (unlikely(!free))
+ token = xen_spin_adjust(lock, token);
+ do {
+ count = 1 << 10;
+- __raw_spin_lock_body;
++ __ticket_spin_lock_body;
+ } while (unlikely(!count) && !xen_spin_wait(lock, token));
+ }
+
+-static __always_inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
+- unsigned long flags)
++static __always_inline void __ticket_spin_lock_flags(raw_spinlock_t *lock,
++ unsigned long flags)
+ {
+ unsigned int token, count;
+ bool free;
+
+- __raw_spin_lock_preamble;
++ __ticket_spin_lock_preamble;
+ if (unlikely(!free))
+ token = xen_spin_adjust(lock, token);
+ do {
+ count = 1 << 10;
+- __raw_spin_lock_body;
++ __ticket_spin_lock_body;
+ } while (unlikely(!count) && !xen_spin_wait_flags(lock, &token, flags));
+ }
+
++#ifdef CONFIG_PARAVIRT
++/*
++ * Define virtualization-friendly old-style lock byte lock, for use in
++ * pv_lock_ops if desired.
++ *
++ * This differs from the pre-2.6.24 spinlock by always using xchgb
++ * rather than decb to take the lock; this allows it to use a
++ * zero-initialized lock structure. It also maintains a 1-byte
++ * contention counter, so that we can implement
++ * __byte_spin_is_contended.
++ */
++struct __byte_spinlock {
++ s8 lock;
++ s8 spinners;
++};
++
++static inline int __byte_spin_is_locked(raw_spinlock_t *lock)
++{
++ struct __byte_spinlock *bl = (struct __byte_spinlock *)lock;
++ return bl->lock != 0;
++}
++
++static inline int __byte_spin_is_contended(raw_spinlock_t *lock)
++{
++ struct __byte_spinlock *bl = (struct __byte_spinlock *)lock;
++ return bl->spinners != 0;
++}
++
++static inline void __byte_spin_lock(raw_spinlock_t *lock)
++{
++ struct __byte_spinlock *bl = (struct __byte_spinlock *)lock;
++ s8 val = 1;
++
++ asm("1: xchgb %1, %0\n"
++ " test %1,%1\n"
++ " jz 3f\n"
++ " " LOCK_PREFIX "incb %2\n"
++ "2: rep;nop\n"
++ " cmpb $1, %0\n"
++ " je 2b\n"
++ " " LOCK_PREFIX "decb %2\n"
++ " jmp 1b\n"
++ "3:"
++ : "+m" (bl->lock), "+q" (val), "+m" (bl->spinners): : "memory");
++}
++
++static inline int __byte_spin_trylock(raw_spinlock_t *lock)
++{
++ struct __byte_spinlock *bl = (struct __byte_spinlock *)lock;
++ u8 old = 1;
++
++ asm("xchgb %1,%0"
++ : "+m" (bl->lock), "+q" (old) : : "memory");
++
++ return old == 0;
++}
++
++static inline void __byte_spin_unlock(raw_spinlock_t *lock)
++{
++ struct __byte_spinlock *bl = (struct __byte_spinlock *)lock;
++ smp_wmb();
++ bl->lock = 0;
++}
++#else /* !CONFIG_PARAVIRT */
++static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
++{
++ return __ticket_spin_is_locked(lock);
++}
++
++static inline int __raw_spin_is_contended(raw_spinlock_t *lock)
++{
++ return __ticket_spin_is_contended(lock);
++}
++
++static __always_inline void __raw_spin_lock(raw_spinlock_t *lock)
++{
++ __ticket_spin_lock(lock);
++}
++
++static __always_inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
++ unsigned long flags)
++{
++ __ticket_spin_lock_flags(lock, flags);
++}
++
++static __always_inline int __raw_spin_trylock(raw_spinlock_t *lock)
++{
++ return __ticket_spin_trylock(lock);
++}
++
++static __always_inline void __raw_spin_unlock(raw_spinlock_t *lock)
++{
++ __ticket_spin_unlock(lock);
++}
++#endif /* CONFIG_PARAVIRT */
++
+ static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
+ {
+ while (__raw_spin_is_locked(lock))
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/system.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/system.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/system.h 2008-12-01 11:49:07.000000000 +0100
+@@ -137,7 +137,7 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t"
+ #define set_base(ldt, base) _set_base(((char *)&(ldt)) , (base))
+ #define set_limit(ldt, limit) _set_limit(((char *)&(ldt)) , ((limit)-1))
+
+-extern void load_gs_index(unsigned);
++extern void xen_load_gs_index(unsigned);
+
+ /*
+ * Load a segment. Fall back on loading the zero
+@@ -154,14 +154,14 @@ extern void load_gs_index(unsigned);
+ "jmp 2b\n" \
+ ".previous\n" \
+ _ASM_EXTABLE(1b,3b) \
+- : :"r" (value), "r" (0))
++ : :"r" (value), "r" (0) : "memory")
+
+
+ /*
+ * Save a segment register away
+ */
+ #define savesegment(seg, value) \
+- asm volatile("mov %%" #seg ",%0":"=rm" (value))
++ asm("mov %%" #seg ",%0":"=r" (value) : : "memory")
+
+ static inline unsigned long get_limit(unsigned long segment)
+ {
+@@ -269,6 +269,7 @@ static inline void xen_wbinvd(void)
+ #ifdef CONFIG_X86_64
+ #define read_cr8() (xen_read_cr8())
+ #define write_cr8(x) (xen_write_cr8(x))
++#define load_gs_index xen_load_gs_index
+ #endif
+
+ /* Clear the 'TS' bit */
+@@ -287,13 +288,12 @@ static inline void clflush(volatile void
+ void disable_hlt(void);
+ void enable_hlt(void);
+
+-extern int es7000_plat;
+ void cpu_idle_wait(void);
+
+ extern unsigned long arch_align_stack(unsigned long sp);
+ extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
+
+-void default_idle(void);
++void xen_idle(void);
+
+ /*
+ * Force strict CPU ordering.
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/xor_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/xor_64.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/xor_64.h 2008-12-01 11:49:07.000000000 +0100
+@@ -1,3 +1,6 @@
++#ifndef ASM_X86__XOR_64_H
++#define ASM_X86__XOR_64_H
++
+ /*
+ * x86-64 changes / gcc fixes from Andi Kleen.
+ * Copyright 2002 Andi Kleen, SuSE Labs.
+@@ -330,3 +333,5 @@ do { \
+ We may also be able to load into the L1 only depending on how the cpu
+ deals with a load to a line that is being prefetched. */
+ #define XOR_SELECT_TEMPLATE(FASTEST) (&xor_block_sse)
++
++#endif /* ASM_X86__XOR_64_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/irq_vectors.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/irq_vectors.h 2008-12-01 11:37:10.000000000 +0100
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,126 +0,0 @@
+-/*
+- * This file should contain #defines for all of the interrupt vector
+- * numbers used by this architecture.
+- *
+- * In addition, there are some standard defines:
+- *
+- * FIRST_EXTERNAL_VECTOR:
+- * The first free place for external interrupts
+- *
+- * SYSCALL_VECTOR:
+- * The IRQ vector a syscall makes the user to kernel transition
+- * under.
+- *
+- * TIMER_IRQ:
+- * The IRQ number the timer interrupt comes in at.
+- *
+- * NR_IRQS:
+- * The total number of interrupt vectors (including all the
+- * architecture specific interrupts) needed.
+- *
+- */
+-#ifndef _ASM_IRQ_VECTORS_H
+-#define _ASM_IRQ_VECTORS_H
+-
+-/*
+- * IDT vectors usable for external interrupt sources start
+- * at 0x20:
+- */
+-#define FIRST_EXTERNAL_VECTOR 0x20
+-
+-#define SYSCALL_VECTOR 0x80
+-
+-/*
+- * Vectors 0x20-0x2f are used for ISA interrupts.
+- */
+-
+-#if 0
+-/*
+- * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
+- *
+- * some of the following vectors are 'rare', they are merged
+- * into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
+- * TLB, reschedule and local APIC vectors are performance-critical.
+- *
+- * Vectors 0xf0-0xfa are free (reserved for future Linux use).
+- */
+-#define SPURIOUS_APIC_VECTOR 0xff
+-#define ERROR_APIC_VECTOR 0xfe
+-#define INVALIDATE_TLB_VECTOR 0xfd
+-#define RESCHEDULE_VECTOR 0xfc
+-#define CALL_FUNCTION_VECTOR 0xfb
+-
+-#define THERMAL_APIC_VECTOR 0xf0
+-/*
+- * Local APIC timer IRQ vector is on a different priority level,
+- * to work around the 'lost local interrupt if more than 2 IRQ
+- * sources per level' errata.
+- */
+-#define LOCAL_TIMER_VECTOR 0xef
+-#endif
+-
+-#define SPURIOUS_APIC_VECTOR 0xff
+-#define ERROR_APIC_VECTOR 0xfe
+-
+-/*
+- * First APIC vector available to drivers: (vectors 0x30-0xee)
+- * we start at 0x31 to spread out vectors evenly between priority
+- * levels. (0x80 is the syscall vector)
+- */
+-#define FIRST_DEVICE_VECTOR 0x31
+-#define FIRST_SYSTEM_VECTOR 0xef
+-
+-/*
+- * 16 8259A IRQ's, 208 potential APIC interrupt sources.
+- * Right now the APIC is mostly only used for SMP.
+- * 256 vectors is an architectural limit. (we can have
+- * more than 256 devices theoretically, but they will
+- * have to use shared interrupts)
+- * Since vectors 0x00-0x1f are used/reserved for the CPU,
+- * the usable vector space is 0x20-0xff (224 vectors)
+- */
+-
+-#define RESCHEDULE_VECTOR 0
+-#define CALL_FUNCTION_VECTOR 1
+-#define SPIN_UNLOCK_VECTOR 2
+-#define NR_IPIS 3
+-
+-/*
+- * The maximum number of vectors supported by i386 processors
+- * is limited to 256. For processors other than i386, NR_VECTORS
+- * should be changed accordingly.
+- */
+-#define NR_VECTORS 256
+-
+-#define FPU_IRQ 13
+-
+-#define FIRST_VM86_IRQ 3
+-#define LAST_VM86_IRQ 15
+-#define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15)
+-
+-/*
+- * The flat IRQ space is divided into two regions:
+- * 1. A one-to-one mapping of real physical IRQs. This space is only used
+- * if we have physical device-access privilege. This region is at the
+- * start of the IRQ space so that existing device drivers do not need
+- * to be modified to translate physical IRQ numbers into our IRQ space.
+- * 3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These
+- * are bound using the provided bind/unbind functions.
+- */
+-
+-#define PIRQ_BASE 0
+-#if !defined(MAX_IO_APICS)
+-# define NR_PIRQS (NR_VECTORS + 32 * NR_CPUS)
+-#elif NR_CPUS < MAX_IO_APICS
+-# define NR_PIRQS (NR_VECTORS + 32 * NR_CPUS)
+-#else
+-# define NR_PIRQS (NR_VECTORS + 32 * MAX_IO_APICS)
+-#endif
+-
+-#define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS)
+-#define NR_DYNIRQS 256
+-
+-#define NR_IRQS (NR_PIRQS + NR_DYNIRQS)
+-#define NR_IRQ_VECTORS NR_IRQS
+-
+-#endif /* _ASM_IRQ_VECTORS_H */
+Index: head-2008-12-01/include/asm-x86/mach-xen/setup_arch_post.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/setup_arch_post.h 2008-12-03 15:48:43.000000000 +0100
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,63 +0,0 @@
+-/**
+- * machine_specific_* - Hooks for machine specific setup.
+- *
+- * Description:
+- * This is included late in kernel/setup.c so that it can make
+- * use of all of the static functions.
+- **/
+-
+-#include <xen/interface/callback.h>
+-
+-extern void hypervisor_callback(void);
+-extern void failsafe_callback(void);
+-extern void nmi(void);
+-
+-static void __init machine_specific_arch_setup(void)
+-{
+- int ret;
+- static struct callback_register __initdata event = {
+- .type = CALLBACKTYPE_event,
+- .address = (unsigned long) hypervisor_callback,
+- };
+- static struct callback_register __initdata failsafe = {
+- .type = CALLBACKTYPE_failsafe,
+- .address = (unsigned long)failsafe_callback,
+- };
+- static struct callback_register __initdata syscall = {
+- .type = CALLBACKTYPE_syscall,
+- .address = (unsigned long)system_call,
+- };
+-#ifdef CONFIG_X86_LOCAL_APIC
+- static struct callback_register __initdata nmi_cb = {
+- .type = CALLBACKTYPE_nmi,
+- .address = (unsigned long)nmi,
+- };
+-#endif
+-
+- ret = HYPERVISOR_callback_op(CALLBACKOP_register, &event);
+- if (ret == 0)
+- ret = HYPERVISOR_callback_op(CALLBACKOP_register, &failsafe);
+- if (ret == 0)
+- ret = HYPERVISOR_callback_op(CALLBACKOP_register, &syscall);
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (ret == -ENOSYS)
+- ret = HYPERVISOR_set_callbacks(
+- event.address,
+- failsafe.address,
+- syscall.address);
+-#endif
+- BUG_ON(ret);
+-
+-#ifdef CONFIG_X86_LOCAL_APIC
+- ret = HYPERVISOR_callback_op(CALLBACKOP_register, &nmi_cb);
+-#if CONFIG_XEN_COMPAT <= 0x030002
+- if (ret == -ENOSYS) {
+- static struct xennmi_callback __initdata cb = {
+- .handler_address = (unsigned long)nmi
+- };
+-
+- HYPERVISOR_nmi_op(XENNMI_register_callback, &cb);
+- }
+-#endif
+-#endif
+-}
+Index: head-2008-12-01/include/asm-x86/mach-xen/setup_arch_pre.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/setup_arch_pre.h 2008-12-03 15:48:43.000000000 +0100
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,5 +0,0 @@
+-/* Hook to call BIOS initialisation function */
+-
+-#define ARCH_SETUP machine_specific_arch_setup();
+-
+-static void __init machine_specific_arch_setup(void);
+Index: head-2008-12-01/include/asm-x86/traps.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/traps.h 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/include/asm-x86/traps.h 2008-12-01 11:49:07.000000000 +0100
+@@ -23,6 +23,9 @@ asmlinkage void spurious_interrupt_bug(v
+ #ifdef CONFIG_X86_MCE
+ asmlinkage void machine_check(void);
+ #endif /* CONFIG_X86_MCE */
++#ifdef CONFIG_X86_XEN
++asmlinkage void fixup_4gb_segment(void);
++#endif
+
+ void do_divide_error(struct pt_regs *, long);
+ void do_overflow(struct pt_regs *, long);
+@@ -48,6 +51,9 @@ void math_error(void __user *);
+ void do_coprocessor_error(struct pt_regs *, long);
+ void do_simd_coprocessor_error(struct pt_regs *, long);
+ void do_spurious_interrupt_bug(struct pt_regs *, long);
++#ifdef CONFIG_XEN
++void do_fixup_4gb_segment(struct pt_regs *, long);
++#endif
+ unsigned long patch_espfix_desc(unsigned long, unsigned long);
+ asmlinkage void math_emulate(long);
+
+Index: head-2008-12-01/include/asm-x86/xen/hypercall.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/xen/hypercall.h 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/include/asm-x86/xen/hypercall.h 2008-12-01 11:49:07.000000000 +0100
+@@ -264,7 +264,7 @@ HYPERVISOR_fpu_taskswitch(int set)
+ static inline int
+ HYPERVISOR_sched_op(int cmd, void *arg)
+ {
+- return _hypercall2(int, sched_op_new, cmd, arg);
++ return _hypercall2(int, sched_op, cmd, arg);
+ }
+
+ static inline long
+Index: head-2008-12-01/include/asm-x86/xen/interface_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/xen/interface_64.h 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/include/asm-x86/xen/interface_64.h 2008-12-01 11:49:07.000000000 +0100
+@@ -136,7 +136,7 @@ struct cpu_user_regs {
+ uint16_t fs, _pad5[3]; /* Non-zero => takes precedence over fs_base. */
+ uint16_t gs, _pad6[3]; /* Non-zero => takes precedence over gs_base_usr. */
+ };
+-DEFINE_GUEST_HANDLE_STRUCT(cpu_user_regs);
++DEFINE_XEN_GUEST_HANDLE_STRUCT(cpu_user_regs);
+
+ #undef __DECL_REG
+
+Index: head-2008-12-01/include/linux/page-flags.h
+===================================================================
+--- head-2008-12-01.orig/include/linux/page-flags.h 2008-12-01 11:48:52.000000000 +0100
++++ head-2008-12-01/include/linux/page-flags.h 2008-12-01 11:49:07.000000000 +0100
+@@ -109,9 +109,11 @@ enum pageflags {
+ /* Filesystems */
+ PG_checked = PG_owner_priv_1,
+
++#ifdef CONFIG_PARAVIRT_XEN
+ /* XEN */
+ PG_pinned = PG_owner_priv_1,
+ PG_savepinned = PG_dirty,
++#endif
+
+ /* SLOB */
+ PG_slob_page = PG_active,
+@@ -185,8 +187,12 @@ PAGEFLAG(LRU, lru) __CLEARPAGEFLAG(LRU,
+ PAGEFLAG(Active, active) __CLEARPAGEFLAG(Active, active)
+ __PAGEFLAG(Slab, slab)
+ PAGEFLAG(Checked, checked) /* Used by some filesystems */
++#if defined(CONFIG_XEN) || defined(CONFIG_PARAVIRT_XEN)
+ PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned) /* Xen */
++#endif
++#ifdef CONFIG_PARAVIRT_XEN
+ PAGEFLAG(SavePinned, savepinned); /* Xen */
++#endif
+ PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved)
+ PAGEFLAG(Private, private) __CLEARPAGEFLAG(Private, private)
+ __SETPAGEFLAG(Private, private)
+Index: head-2008-12-01/include/xen/interface/memory.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/interface/memory.h 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/include/xen/interface/memory.h 2008-12-01 11:49:07.000000000 +0100
+@@ -82,6 +82,7 @@ struct xen_memory_reservation {
+ domid_t domid;
+
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_memory_reservation);
+ typedef struct xen_memory_reservation xen_memory_reservation_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_memory_reservation_t);
+
+@@ -167,11 +168,7 @@ struct xen_machphys_mfn_list {
+ * any large discontiguities in the machine address space, 2MB gaps in
+ * the machphys table will be represented by an MFN base of zero.
+ */
+-#ifndef CONFIG_PARAVIRT_XEN
+ XEN_GUEST_HANDLE(xen_pfn_t) extent_start;
+-#else
+- ulong extent_start;
+-#endif
+
+ /*
+ * Number of extents written to the above array. This will be smaller
+@@ -179,6 +176,7 @@ struct xen_machphys_mfn_list {
+ */
+ unsigned int nr_extents;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list);
+ typedef struct xen_machphys_mfn_list xen_machphys_mfn_list_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_machphys_mfn_list_t);
+
+@@ -218,6 +216,7 @@ struct xen_add_to_physmap {
+ /* GPFN where the source mapping page should appear. */
+ xen_pfn_t gpfn;
+ };
++DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
+ typedef struct xen_add_to_physmap xen_add_to_physmap_t;
+ DEFINE_XEN_GUEST_HANDLE(xen_add_to_physmap_t);
+
+@@ -250,21 +249,13 @@ struct xen_translate_gpfn_list {
+ xen_ulong_t nr_gpfns;
+
+ /* List of GPFNs to translate. */
+-#ifndef CONFIG_PARAVIRT_XEN
+ XEN_GUEST_HANDLE(xen_pfn_t) gpfn_list;
+-#else
+- ulong gpfn_list;
+-#endif
+
+ /*
+ * Output list to contain MFN translations. May be the same as the input
+ * list (in which case each input GPFN is overwritten with the output MFN).
+ */
+-#ifndef CONFIG_PARAVIRT_XEN
+ XEN_GUEST_HANDLE(xen_pfn_t) mfn_list;
+-#else
+- ulong mfn_list;
+-#endif
+ };
+ DEFINE_XEN_GUEST_HANDLE_STRUCT(xen_translate_gpfn_list);
+ typedef struct xen_translate_gpfn_list xen_translate_gpfn_list_t;
+Index: head-2008-12-01/kernel/hrtimer.c
+===================================================================
+--- head-2008-12-01.orig/kernel/hrtimer.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/kernel/hrtimer.c 2008-12-01 11:49:07.000000000 +0100
+@@ -1084,7 +1084,7 @@ ktime_t hrtimer_get_remaining(const stru
+ }
+ EXPORT_SYMBOL_GPL(hrtimer_get_remaining);
+
+-#ifdef CONFIG_NO_HZ
++#if defined(CONFIG_NO_HZ) || defined(CONFIG_NO_IDLE_HZ)
+ /**
+ * hrtimer_get_next_event - get the time until next expiry event
+ *
+Index: head-2008-12-01/kernel/timer.c
+===================================================================
+--- head-2008-12-01.orig/kernel/timer.c 2008-12-03 15:48:43.000000000 +0100
++++ head-2008-12-01/kernel/timer.c 2008-12-01 11:49:07.000000000 +0100
+@@ -815,7 +815,7 @@ static inline void __run_timers(struct t
+ spin_unlock_irq(&base->lock);
+ }
+
+-#ifdef CONFIG_NO_HZ
++#if defined(CONFIG_NO_HZ) || defined(CONFIG_NO_IDLE_HZ)
+ /*
+ * Find out when the next timer event is due to happen. This
+ * is used on S/390 to stop all activity when a cpus is idle.
+Index: head-2008-12-01/lib/swiotlb-xen.c
+===================================================================
+--- head-2008-12-01.orig/lib/swiotlb-xen.c 2008-12-01 11:44:55.000000000 +0100
++++ head-2008-12-01/lib/swiotlb-xen.c 2008-12-01 11:49:07.000000000 +0100
+@@ -750,7 +750,7 @@ swiotlb_sync_sg_for_device(struct device
+ }
+
+ int
+-swiotlb_dma_mapping_error(dma_addr_t dma_addr)
++swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr)
+ {
+ return (dma_addr == virt_to_bus(io_tlb_overflow_buffer));
+ }
+Index: head-2008-12-01/mm/mprotect.c
+===================================================================
+--- head-2008-12-01.orig/mm/mprotect.c 2008-12-01 11:29:05.000000000 +0100
++++ head-2008-12-01/mm/mprotect.c 2008-12-01 11:49:07.000000000 +0100
+@@ -92,8 +92,6 @@ static inline void change_pmd_range(stru
+ next = pmd_addr_end(addr, end);
+ if (pmd_none_or_clear_bad(pmd))
+ continue;
+- if (arch_change_pte_range(mm, pmd, addr, next, newprot, dirty_accountable))
+- continue;
+ change_pte_range(mm, pmd, addr, next, newprot, dirty_accountable);
+ } while (pmd++, addr = next, addr != end);
+ }
--- /dev/null
+From: Greg Kroah-Hartman <gregkh@suse.de>
+Subject: Linux 2.6.27.2
+
+Upstream 2.6.27.2 release from kernel.org
+
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+Automatically created from "patches.kernel.org/patch-2.6.27.1-2" by xen-port-patches.py
+
+Index: head-2008-11-25/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/io_apic_32-xen.c 2008-11-25 14:37:19.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/io_apic_32-xen.c 2008-11-25 14:37:27.000000000 +0100
+@@ -2381,6 +2381,9 @@ void __init setup_IO_APIC(void)
+ /* Reserve all the system vectors. */
+ for (i = first_system_vector; i < NR_VECTORS; i++)
+ set_bit(i, used_vectors);
++
++ /* Mark FIRST_DEVICE_VECTOR which is assigned to IRQ0 as used. */
++ set_bit(FIRST_DEVICE_VECTOR, used_vectors);
+ #endif
+
+ enable_IO_APIC();
+Index: head-2008-11-25/arch/x86/mm/ioremap-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/mm/ioremap-xen.c 2008-11-27 09:34:01.000000000 +0100
++++ head-2008-11-25/arch/x86/mm/ioremap-xen.c 2008-11-27 09:36:21.000000000 +0100
+@@ -784,7 +784,7 @@ void __init *early_ioremap(unsigned long
+ */
+ offset = phys_addr & ~PAGE_MASK;
+ phys_addr &= PAGE_MASK;
+- size = PAGE_ALIGN(last_addr) - phys_addr;
++ size = PAGE_ALIGN(last_addr + 1) - phys_addr;
+
+ /*
+ * Mappings have to fit in the FIX_BTMAP area.
--- /dev/null
+From: Greg Kroah-Hartman <gregkh@suse.de>
+Subject: Linux 2.6.27.4
+
+Upstream 2.6.27.4 release from kernel.org
+
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+Automatically created from "patches.kernel.org/patch-2.6.27.3-4" by xen-port-patches.py
+
+Index: head-2008-10-29/arch/x86/kernel/acpi/sleep-xen.c
+===================================================================
+--- head-2008-10-29.orig/arch/x86/kernel/acpi/sleep-xen.c 2008-10-29 11:26:27.000000000 +0100
++++ head-2008-10-29/arch/x86/kernel/acpi/sleep-xen.c 2008-10-29 11:29:30.000000000 +0100
+@@ -10,6 +10,7 @@
+ #include <linux/dmi.h>
+ #include <linux/cpumask.h>
+ #include <asm/segment.h>
++#include <asm/desc.h>
+
+ #include "realmode/wakeup.h"
+ #include "sleep.h"
+@@ -101,6 +102,8 @@ int acpi_save_state_mem(void)
+ header->trampoline_segment = setup_trampoline() >> 4;
+ #ifdef CONFIG_SMP
+ stack_start.sp = temp_stack + 4096;
++ early_gdt_descr.address =
++ (unsigned long)get_cpu_gdt_table(smp_processor_id());
+ #endif
+ initial_code = (unsigned long)wakeup_long64;
+ saved_magic = 0x123456789abcdef0;
--- /dev/null
+From: Greg Kroah-Hartman <gregkh@suse.de>
+Subject: Linux 2.6.27.5
+
+Upstream 2.6.27.5 release from kernel.org
+
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+Automatically created from "patches.kernel.org/patch-2.6.27.4-5" by xen-port-patches.py
+
+Index: head-2008-11-25/arch/x86/kernel/process_64-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/process_64-xen.c 2008-11-25 13:34:32.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/process_64-xen.c 2008-11-10 12:12:28.000000000 +0100
+@@ -786,12 +786,12 @@ unsigned long get_wchan(struct task_stru
+ if (!p || p == current || p->state==TASK_RUNNING)
+ return 0;
+ stack = (unsigned long)task_stack_page(p);
+- if (p->thread.sp < stack || p->thread.sp > stack+THREAD_SIZE)
++ if (p->thread.sp < stack || p->thread.sp >= stack+THREAD_SIZE)
+ return 0;
+ fp = *(u64 *)(p->thread.sp);
+ do {
+ if (fp < (unsigned long)stack ||
+- fp > (unsigned long)stack+THREAD_SIZE)
++ fp >= (unsigned long)stack+THREAD_SIZE)
+ return 0;
+ ip = *(u64 *)(fp+8);
+ if (!in_sched_functions(ip))
+Index: head-2008-11-25/arch/x86/mm/pat-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/mm/pat-xen.c 2008-11-27 09:35:47.000000000 +0100
++++ head-2008-11-25/arch/x86/mm/pat-xen.c 2008-11-27 09:36:36.000000000 +0100
+@@ -415,12 +415,16 @@ static inline int range_is_allowed(unsig
+ return 1;
+ }
+ #else
++/* This check is needed to avoid cache aliasing when PAT is enabled */
+ static inline int range_is_allowed(unsigned long mfn, unsigned long size)
+ {
+ u64 from = ((u64)mfn) << PAGE_SHIFT;
+ u64 to = from + size;
+ u64 cursor = from;
+
++ if (!pat_enabled)
++ return 1;
++
+ while (cursor < to) {
+ if (!devmem_is_allowed(mfn)) {
+ printk(KERN_INFO
--- /dev/null
+From: Greg Kroah-Hartman <gregkh@suse.de>
+Subject: Linux 2.6.27.6
+
+Upstream 2.6.27.6 release from kernel.org
+
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+Automatically created from "patches.kernel.org/patch-2.6.27.5-6" by xen-port-patches.py
+
+Index: head-2008-11-17/arch/x86/Kconfig
+===================================================================
+--- head-2008-11-17.orig/arch/x86/Kconfig 2008-11-18 16:18:56.000000000 +0100
++++ head-2008-11-17/arch/x86/Kconfig 2008-11-18 16:19:14.000000000 +0100
+@@ -1143,6 +1143,7 @@ config HIGHPTE
+ config X86_RESERVE_LOW_64K
+ bool "Reserve low 64K of RAM on AMI/Phoenix BIOSen"
+ default y
++ depends on !XEN
+ help
+ Reserve the first 64K of physical RAM on BIOSes that are known
+ to potentially corrupt that memory range. A numbers of BIOSes are
+Index: head-2008-11-17/arch/x86/kernel/setup-xen.c
+===================================================================
+--- head-2008-11-17.orig/arch/x86/kernel/setup-xen.c 2008-11-17 13:42:08.000000000 +0100
++++ head-2008-11-17/arch/x86/kernel/setup-xen.c 2008-11-17 13:55:53.000000000 +0100
+@@ -645,6 +645,41 @@ static struct x86_quirks default_x86_qui
+
+ struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
+
++#ifdef CONFIG_X86_RESERVE_LOW_64K
++static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
++{
++ printk(KERN_NOTICE
++ "%s detected: BIOS may corrupt low RAM, working it around.\n",
++ d->ident);
++
++ e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED);
++ sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
++
++ return 0;
++}
++#endif
++
++/* List of systems that have known low memory corruption BIOS problems */
++static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
++#ifdef CONFIG_X86_RESERVE_LOW_64K
++ {
++ .callback = dmi_low_memory_corruption,
++ .ident = "AMI BIOS",
++ .matches = {
++ DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
++ },
++ },
++ {
++ .callback = dmi_low_memory_corruption,
++ .ident = "Phoenix BIOS",
++ .matches = {
++ DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
++ },
++ },
++#endif
++ {}
++};
++
+ /*
+ * Determine if we were loaded by an EFI loader. If so, then we have also been
+ * passed the efi memmap, systab, etc., so we should use these data structures
+@@ -819,6 +854,11 @@ void __init setup_arch(char **cmdline_p)
+
+ finish_e820_parsing();
+
++ if (is_initial_xendomain()) {
++ dmi_scan_machine();
++ dmi_check_system(bad_bios_dmi_table);
++ }
++
+ #ifdef CONFIG_X86_32
+ probe_roms();
+ #endif
+@@ -922,9 +962,6 @@ void __init setup_arch(char **cmdline_p)
+ vsmp_init();
+ #endif
+
+- if (is_initial_xendomain())
+- dmi_scan_machine();
+-
+ io_delay_init();
+
+ #ifdef CONFIG_ACPI
--- /dev/null
+From: Kurt Garloff <garloff@suse.de>
+Subject: [PATCH] X86: sysctl to allow panic on IOCK NMI error
+References: bnc427979
+
+This patch introduces a sysctl /proc/sys/kernel/panic_on_io_nmi.,
+which defaults to 0 (off).
+When enabled, the kernel panics when the kernel receives an NMI
+caused by an IO error.
+
+The IO error triggered NMI indicates a serious system condition,
+which could result in IO data corruption. Rather than contiuing,
+panicing and dumping might be a better choice, so one can figure
+out what's causing the IO error.
+This could be especially important to companies running IO intensive
+applications where corruption must be avoided, e.g. a banks databases.
+
+
+Signed-off-by: Roberto Angelino <robertangelino@gmail.com>
+
+
+Automatically created from "patches.suse/panic-on-io-nmi.diff" by xen-port-patches.py
+
+Index: head-2008-11-25/arch/x86/kernel/traps_32-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/traps_32-xen.c 2008-11-25 12:57:05.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/traps_32-xen.c 2008-11-25 13:13:12.000000000 +0100
+@@ -83,6 +83,7 @@ gate_desc idt_table[256]
+ #endif
+
+ int panic_on_unrecovered_nmi;
++int panic_on_io_nmi;
+ int kstack_depth_to_print = 24;
+ static unsigned int code_bytes = 64;
+ static int ignore_nmis;
+@@ -670,6 +671,9 @@ io_check_error(unsigned char reason, str
+ printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
+ show_registers(regs);
+
++ if (panic_on_io_nmi)
++ panic("NMI IOCK error: Not continuing");
++
+ /* Re-enable the IOCK line, wait for a few seconds */
+ clear_io_check_error(reason);
+ }
+Index: head-2008-11-25/arch/x86/kernel/traps_64-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/traps_64-xen.c 2008-11-25 12:57:05.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/traps_64-xen.c 2008-11-25 13:13:12.000000000 +0100
+@@ -56,6 +56,7 @@
+ #include <mach_traps.h>
+
+ int panic_on_unrecovered_nmi;
++int panic_on_io_nmi;
+ int kstack_depth_to_print = 12;
+ static unsigned int code_bytes = 64;
+ static int ignore_nmis;
+@@ -772,6 +773,9 @@ io_check_error(unsigned char reason, str
+ printk("NMI: IOCK error (debug interrupt?)\n");
+ show_registers(regs);
+
++ if (panic_on_io_nmi)
++ panic("NMI IOCK error: Not continuing");
++
+ /* Re-enable the IOCK line, wait for a few seconds */
+ clear_io_check_error(reason);
+ }
--- /dev/null
+From: ccoffing@novell.com
+Subject: Expose min/max limits of domain ballooning
+Patch-mainline: obsolete
+References: 152667, 184727
+
+jb: Also added this to the sysfs representation.
+
+Index: head-2008-11-25/drivers/xen/balloon/balloon.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/balloon/balloon.c 2008-11-25 13:33:56.000000000 +0100
++++ head-2008-11-25/drivers/xen/balloon/balloon.c 2008-11-25 13:34:52.000000000 +0100
+@@ -194,7 +194,7 @@ static unsigned long current_target(void
+ return target;
+ }
+
+-static unsigned long minimum_target(void)
++unsigned long balloon_minimum_target(void)
+ {
+ #ifndef CONFIG_XEN
+ #define max_pfn num_physpages
+@@ -421,7 +421,7 @@ void balloon_set_new_target(unsigned lon
+ {
+ /* No need for lock. Not read-modify-write updates. */
+ bs.hard_limit = ~0UL;
+- bs.target_pages = max(target, minimum_target());
++ bs.target_pages = max(target, balloon_minimum_target());
+ schedule_work(&balloon_worker);
+ }
+
+@@ -496,11 +496,14 @@ static int balloon_read(char *page, char
+ page,
+ "Current allocation: %8lu kB\n"
+ "Requested target: %8lu kB\n"
++ "Minimum target: %8lu kB\n"
++ "Maximum target: %8lu kB\n"
+ "Low-mem balloon: %8lu kB\n"
+ "High-mem balloon: %8lu kB\n"
+ "Driver pages: %8lu kB\n"
+ "Xen hard limit: ",
+ PAGES2KB(bs.current_pages), PAGES2KB(bs.target_pages),
++ PAGES2KB(balloon_minimum_target()), PAGES2KB(num_physpages),
+ PAGES2KB(bs.balloon_low), PAGES2KB(bs.balloon_high),
+ PAGES2KB(bs.driver_pages));
+
+Index: head-2008-11-25/drivers/xen/balloon/common.h
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/balloon/common.h 2007-06-12 13:13:44.000000000 +0200
++++ head-2008-11-25/drivers/xen/balloon/common.h 2008-11-25 13:34:52.000000000 +0100
+@@ -47,6 +47,7 @@ struct balloon_stats {
+ unsigned long balloon_high;
+ };
+
++extern unsigned long num_physpages;
+ extern struct balloon_stats balloon_stats;
+ #define bs balloon_stats
+
+@@ -54,5 +55,6 @@ int balloon_sysfs_init(void);
+ void balloon_sysfs_exit(void);
+
+ void balloon_set_new_target(unsigned long target);
++unsigned long balloon_minimum_target(void);
+
+ #endif /* __XEN_BALLOON_COMMON_H__ */
+Index: head-2008-11-25/drivers/xen/balloon/sysfs.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/balloon/sysfs.c 2008-11-25 13:34:32.000000000 +0100
++++ head-2008-11-25/drivers/xen/balloon/sysfs.c 2008-11-25 13:34:52.000000000 +0100
+@@ -53,6 +53,8 @@
+ static SYSDEV_ATTR(name, S_IRUGO, show_##name, NULL)
+
+ BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(bs.current_pages));
++BALLOON_SHOW(min_kb, "%lu\n", PAGES2KB(balloon_minimum_target()));
++BALLOON_SHOW(max_kb, "%lu\n", PAGES2KB(num_physpages));
+ BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(bs.balloon_low));
+ BALLOON_SHOW(high_kb, "%lu\n", PAGES2KB(bs.balloon_high));
+ BALLOON_SHOW(hard_limit_kb,
+@@ -97,6 +99,8 @@ static struct sysdev_attribute *balloon_
+
+ static struct attribute *balloon_info_attrs[] = {
+ &attr_current_kb.attr,
++ &attr_min_kb.attr,
++ &attr_max_kb.attr,
+ &attr_low_kb.attr,
+ &attr_high_kb.attr,
+ &attr_hard_limit_kb.attr,
--- /dev/null
+Subject: CDROM removable media-present attribute plus handling code
+From: plc@novell.com
+Patch-mainline: obsolete
+References: 159907
+
+Index: head-2008-05-08/drivers/xen/blkback/Makefile
+===================================================================
+--- head-2008-05-08.orig/drivers/xen/blkback/Makefile 2008-05-08 15:34:23.000000000 +0200
++++ head-2008-05-08/drivers/xen/blkback/Makefile 2008-05-08 15:05:13.000000000 +0200
+@@ -1,3 +1,3 @@
+ obj-$(CONFIG_XEN_BLKDEV_BACKEND) := blkbk.o
+
+-blkbk-y := blkback.o xenbus.o interface.o vbd.o
++blkbk-y := blkback.o xenbus.o interface.o vbd.o cdrom.o
+Index: head-2008-05-08/drivers/xen/blkback/cdrom.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-05-08/drivers/xen/blkback/cdrom.c 2008-05-13 15:34:40.000000000 +0200
+@@ -0,0 +1,162 @@
++/******************************************************************************
++ * blkback/cdrom.c
++ *
++ * Routines for managing cdrom watch and media-present attribute of a
++ * cdrom type virtual block device (VBD).
++ *
++ * Copyright (c) 2003-2005, Keir Fraser & Steve Hand
++ * Copyright (c) 2007 Pat Campbell
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation; or, when distributed
++ * separately from the Linux kernel or incorporated into other
++ * software packages, subject to the following license:
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#include "common.h"
++
++#undef DPRINTK
++#define DPRINTK(_f, _a...) \
++ printk("(%s() file=%s, line=%d) " _f "\n", \
++ __PRETTY_FUNCTION__, __FILE__ , __LINE__ , ##_a )
++
++
++#define MEDIA_PRESENT "media-present"
++
++static void cdrom_media_changed(struct xenbus_watch *, const char **, unsigned int);
++
++/**
++ * Writes media-present=1 attribute for the given vbd device if not
++ * already there
++ */
++static int cdrom_xenstore_write_media_present(struct backend_info *be)
++{
++ struct xenbus_device *dev = be->dev;
++ struct xenbus_transaction xbt;
++ int err;
++ int media_present;
++
++ err = xenbus_scanf(XBT_NIL, dev->nodename, MEDIA_PRESENT, "%d",
++ &media_present);
++ if (0 < err) {
++ DPRINTK("already written err%d", err);
++ return(0);
++ }
++ media_present = 1;
++
++again:
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "starting transaction");
++ return(-1);
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, MEDIA_PRESENT, "%d", media_present );
++ if (err) {
++ xenbus_dev_fatal(dev, err, "writing %s/%s",
++ dev->nodename, MEDIA_PRESENT);
++ goto abort;
++ }
++ err = xenbus_transaction_end(xbt, 0);
++ if (err == -EAGAIN)
++ goto again;
++ if (err)
++ xenbus_dev_fatal(dev, err, "ending transaction");
++ return 0;
++ abort:
++ xenbus_transaction_end(xbt, 1);
++ return -1;
++}
++
++/**
++ *
++ */
++static int cdrom_is_type(struct backend_info *be)
++{
++ DPRINTK("type:%x", be->blkif->vbd.type );
++ return (be->blkif->vbd.type & VDISK_CDROM)
++ && (be->blkif->vbd.type & GENHD_FL_REMOVABLE);
++}
++
++/**
++ *
++ */
++void cdrom_add_media_watch(struct backend_info *be)
++{
++ struct xenbus_device *dev = be->dev;
++ int err;
++
++ DPRINTK("nodename:%s", dev->nodename);
++ if (cdrom_is_type(be)) {
++ DPRINTK("is a cdrom");
++ if ( cdrom_xenstore_write_media_present(be) == 0 ) {
++ DPRINTK( "xenstore wrote OK");
++ err = xenbus_watch_path2(dev, dev->nodename, MEDIA_PRESENT,
++ &be->backend_cdrom_watch,
++ cdrom_media_changed);
++ if (err)
++ DPRINTK( "media_present watch add failed" );
++ }
++ }
++}
++
++/**
++ * Callback received when the "media_present" xenstore node is changed
++ */
++static void cdrom_media_changed(struct xenbus_watch *watch,
++ const char **vec, unsigned int len)
++{
++ int err;
++ unsigned media_present;
++ struct backend_info *be
++ = container_of(watch, struct backend_info, backend_cdrom_watch);
++ struct xenbus_device *dev = be->dev;
++
++ if (!cdrom_is_type(be)) {
++ DPRINTK("callback not for a cdrom" );
++ return;
++ }
++
++ err = xenbus_scanf(XBT_NIL, dev->nodename, MEDIA_PRESENT, "%d",
++ &media_present);
++ if (err == 0 || err == -ENOENT) {
++ DPRINTK("xenbus_read of cdrom media_present node error:%d",err);
++ return;
++ }
++
++ if (media_present == 0)
++ vbd_free(&be->blkif->vbd);
++ else {
++ char *p = strrchr(dev->otherend, '/') + 1;
++ long handle = simple_strtoul(p, NULL, 0);
++
++ if (!be->blkif->vbd.bdev) {
++ err = vbd_create(be->blkif, handle, be->major, be->minor,
++ !strchr(be->mode, 'w'), 1);
++ if (err) {
++ be->major = be->minor = 0;
++ xenbus_dev_fatal(dev, err, "creating vbd structure");
++ return;
++ }
++ }
++ }
++}
+Index: head-2008-05-08/drivers/xen/blkback/common.h
+===================================================================
+--- head-2008-05-08.orig/drivers/xen/blkback/common.h 2008-05-08 15:34:23.000000000 +0200
++++ head-2008-05-08/drivers/xen/blkback/common.h 2008-05-13 15:35:13.000000000 +0200
+@@ -96,6 +96,17 @@ typedef struct blkif_st {
+ grant_ref_t shmem_ref;
+ } blkif_t;
+
++struct backend_info
++{
++ struct xenbus_device *dev;
++ blkif_t *blkif;
++ struct xenbus_watch backend_watch;
++ struct xenbus_watch backend_cdrom_watch;
++ unsigned major;
++ unsigned minor;
++ char *mode;
++};
++
+ blkif_t *blkif_alloc(domid_t domid);
+ void blkif_disconnect(blkif_t *blkif);
+ void blkif_free(blkif_t *blkif);
+@@ -136,4 +147,7 @@ int blkif_schedule(void *arg);
+ int blkback_barrier(struct xenbus_transaction xbt,
+ struct backend_info *be, int state);
+
++/* cdrom media change */
++void cdrom_add_media_watch(struct backend_info *be);
++
+ #endif /* __BLKIF__BACKEND__COMMON_H__ */
+Index: head-2008-05-08/drivers/xen/blkback/vbd.c
+===================================================================
+--- head-2008-05-08.orig/drivers/xen/blkback/vbd.c 2008-05-08 15:34:23.000000000 +0200
++++ head-2008-05-08/drivers/xen/blkback/vbd.c 2008-05-08 15:05:13.000000000 +0200
+@@ -106,6 +106,9 @@ int vbd_translate(struct phys_req *req,
+ if ((operation != READ) && vbd->readonly)
+ goto out;
+
++ if (vbd->bdev == NULL)
++ goto out;
++
+ if (unlikely((req->sector_number + req->nr_sects) > vbd_sz(vbd)))
+ goto out;
+
+Index: head-2008-05-08/drivers/xen/blkback/xenbus.c
+===================================================================
+--- head-2008-05-08.orig/drivers/xen/blkback/xenbus.c 2008-05-08 15:34:23.000000000 +0200
++++ head-2008-05-08/drivers/xen/blkback/xenbus.c 2008-05-08 15:05:13.000000000 +0200
+@@ -28,16 +28,6 @@
+ pr_debug("blkback/xenbus (%s:%d) " fmt ".\n", \
+ __FUNCTION__, __LINE__, ##args)
+
+-struct backend_info
+-{
+- struct xenbus_device *dev;
+- blkif_t *blkif;
+- struct xenbus_watch backend_watch;
+- unsigned major;
+- unsigned minor;
+- char *mode;
+-};
+-
+ static void connect(struct backend_info *);
+ static int connect_ring(struct backend_info *);
+ static void backend_changed(struct xenbus_watch *, const char **,
+@@ -183,6 +173,12 @@ static int blkback_remove(struct xenbus_
+ be->backend_watch.node = NULL;
+ }
+
++ if (be->backend_cdrom_watch.node) {
++ unregister_xenbus_watch(&be->backend_cdrom_watch);
++ kfree(be->backend_cdrom_watch.node);
++ be->backend_cdrom_watch.node = NULL;
++ }
++
+ if (be->blkif) {
+ blkif_disconnect(be->blkif);
+ vbd_free(&be->blkif->vbd);
+@@ -339,6 +335,9 @@ static void backend_changed(struct xenbu
+
+ /* We're potentially connected now */
+ update_blkif_status(be->blkif);
++
++ /* Add watch for cdrom media status if necessay */
++ cdrom_add_media_watch(be);
+ }
+ }
+
--- /dev/null
+From: kwolf@suse.de
+Subject: blktap: Write Barriers
+Patch-mainline: obsolete
+
+Index: head-2008-11-10/drivers/xen/blktap/blktap.c
+===================================================================
+--- head-2008-11-10.orig/drivers/xen/blktap/blktap.c 2008-11-10 12:10:23.000000000 +0100
++++ head-2008-11-10/drivers/xen/blktap/blktap.c 2008-11-10 12:14:32.000000000 +0100
+@@ -1324,6 +1324,9 @@ static int do_block_io_op(blkif_t *blkif
+ dispatch_rw_block_io(blkif, &req, pending_req);
+ break;
+
++ case BLKIF_OP_WRITE_BARRIER:
++ /* TODO Some counter? */
++ /* Fall through */
+ case BLKIF_OP_WRITE:
+ blkif->st_wr_req++;
+ dispatch_rw_block_io(blkif, &req, pending_req);
+@@ -1355,7 +1358,7 @@ static void dispatch_rw_block_io(blkif_t
+ pending_req_t *pending_req)
+ {
+ extern void ll_rw_block(int rw, int nr, struct buffer_head * bhs[]);
+- int op, operation = (req->operation == BLKIF_OP_WRITE) ? WRITE : READ;
++ int op, operation;
+ struct gnttab_map_grant_ref map[BLKIF_MAX_SEGMENTS_PER_REQUEST*2];
+ unsigned int nseg;
+ int ret, i, nr_sects = 0;
+@@ -1366,6 +1369,21 @@ static void dispatch_rw_block_io(blkif_t
+ uint16_t mmap_idx = pending_req->mem_idx;
+ struct mm_struct *mm;
+
++ switch (req->operation) {
++ case BLKIF_OP_READ:
++ operation = READ;
++ break;
++ case BLKIF_OP_WRITE:
++ operation = WRITE;
++ break;
++ case BLKIF_OP_WRITE_BARRIER:
++ operation = WRITE_BARRIER;
++ break;
++ default:
++ operation = 0; /* make gcc happy */
++ BUG();
++ }
++
+ if (blkif->dev_num < 0 || blkif->dev_num > MAX_TAP_DEV)
+ goto fail_response;
+
+@@ -1404,7 +1422,7 @@ static void dispatch_rw_block_io(blkif_t
+
+ pending_req->blkif = blkif;
+ pending_req->id = req->id;
+- pending_req->operation = operation;
++ pending_req->operation = req->operation;
+ pending_req->status = BLKIF_RSP_OKAY;
+ pending_req->nr_pages = nseg;
+ op = 0;
+@@ -1421,7 +1439,7 @@ static void dispatch_rw_block_io(blkif_t
+ kvaddr = idx_to_kaddr(mmap_idx, pending_idx, i);
+
+ flags = GNTMAP_host_map;
+- if (operation == WRITE)
++ if (operation != READ)
+ flags |= GNTMAP_readonly;
+ gnttab_set_map_op(&map[op], kvaddr, flags,
+ req->seg[i].gref, blkif->domid);
+@@ -1438,7 +1456,7 @@ static void dispatch_rw_block_io(blkif_t
+
+ flags = GNTMAP_host_map | GNTMAP_application_map
+ | GNTMAP_contains_pte;
+- if (operation == WRITE)
++ if (operation != READ)
+ flags |= GNTMAP_readonly;
+ gnttab_set_map_op(&map[op], ptep, flags,
+ req->seg[i].gref, blkif->domid);
+Index: head-2008-11-10/drivers/xen/blktap/xenbus.c
+===================================================================
+--- head-2008-11-10.orig/drivers/xen/blktap/xenbus.c 2008-11-10 12:14:29.000000000 +0100
++++ head-2008-11-10/drivers/xen/blktap/xenbus.c 2008-11-10 12:14:32.000000000 +0100
+@@ -395,7 +395,28 @@ static void connect(struct backend_info
+ int err;
+
+ struct xenbus_device *dev = be->dev;
++ struct xenbus_transaction xbt;
+
++ /* Write feature-barrier to xenstore */
++again:
++ err = xenbus_transaction_start(&xbt);
++ if (err) {
++ xenbus_dev_fatal(dev, err, "starting transaction");
++ return;
++ }
++
++ err = xenbus_printf(xbt, dev->nodename, "feature-barrier", "1");
++ if (err) {
++ xenbus_dev_fatal(dev, err, "writing feature-barrier");
++ xenbus_transaction_end(xbt, 1);
++ return;
++ }
++
++ err = xenbus_transaction_end(xbt, 0);
++ if (err == -EAGAIN)
++ goto again;
++
++ /* Switch state */
+ err = xenbus_switch_state(dev, XenbusStateConnected);
+ if (err)
+ xenbus_dev_fatal(dev, err, "switching to Connected state",
--- /dev/null
+From: Hannes Reinecke <hare@suse.de>
+Subject: Update XEN scsifront driver to request timeouts
+Patch-mainline: obsolete
+
+Update XEN scsifront driver to the block request handling
+patches.
+
+Signed-off-by: Hannes Reinecke <hare@suse.de>
+
+Index: head-2008-09-15/drivers/xen/scsifront/scsifront.c
+===================================================================
+--- head-2008-09-15.orig/drivers/xen/scsifront/scsifront.c 2008-09-15 15:22:09.000000000 +0200
++++ head-2008-09-15/drivers/xen/scsifront/scsifront.c 2008-09-15 15:22:12.000000000 +0200
+@@ -348,7 +348,7 @@ static int scsifront_queuecommand(struct
+ memset(ring_req->cmnd, 0, VSCSIIF_MAX_COMMAND_SIZE);
+
+ ring_req->sc_data_direction = (uint8_t)sc->sc_data_direction;
+- ring_req->timeout_per_command = (sc->timeout_per_command / HZ);
++ ring_req->timeout_per_command = (sc->request->timeout / HZ);
+
+ info->shadow[rqid].req_scsi_cmnd = (unsigned long)sc;
+ info->shadow[rqid].sc_data_direction = sc->sc_data_direction;
+@@ -418,7 +418,7 @@ static int scsifront_dev_reset_handler(s
+ memset(ring_req->cmnd, 0, VSCSIIF_MAX_COMMAND_SIZE);
+
+ ring_req->sc_data_direction = (uint8_t)sc->sc_data_direction;
+- ring_req->timeout_per_command = (sc->timeout_per_command / HZ);
++ ring_req->timeout_per_command = (sc->request->timeout / HZ);
+ ring_req->nr_segments = 0;
+
+ scsifront_do_request(info);
--- /dev/null
+From: plc@novell.com
+Subject: add support for new operation type BLKIF_OP_PACKET
+Patch-mainline: obsolete
+References: fate#300964
+
+Index: head-2008-11-10/drivers/xen/blkback/blkback.c
+===================================================================
+--- head-2008-11-10.orig/drivers/xen/blkback/blkback.c 2008-11-10 12:07:53.000000000 +0100
++++ head-2008-11-10/drivers/xen/blkback/blkback.c 2008-11-10 12:15:51.000000000 +0100
+@@ -192,13 +192,15 @@ static void fast_flush_area(pending_req_
+
+ static void print_stats(blkif_t *blkif)
+ {
+- printk(KERN_DEBUG "%s: oo %3d | rd %4d | wr %4d | br %4d\n",
++ printk(KERN_DEBUG "%s: oo %3d | rd %4d | wr %4d | br %4d | pk %4d\n",
+ current->comm, blkif->st_oo_req,
+- blkif->st_rd_req, blkif->st_wr_req, blkif->st_br_req);
++ blkif->st_rd_req, blkif->st_wr_req, blkif->st_br_req,
++ blkif->st_pk_req);
+ blkif->st_print = jiffies + msecs_to_jiffies(10 * 1000);
+ blkif->st_rd_req = 0;
+ blkif->st_wr_req = 0;
+ blkif->st_oo_req = 0;
++ blkif->st_pk_req = 0;
+ }
+
+ int blkif_schedule(void *arg)
+@@ -358,6 +360,13 @@ static int do_block_io_op(blkif_t *blkif
+ blkif->st_wr_req++;
+ dispatch_rw_block_io(blkif, &req, pending_req);
+ break;
++ case BLKIF_OP_PACKET:
++ DPRINTK("error: block operation BLKIF_OP_PACKET not implemented\n");
++ blkif->st_pk_req++;
++ make_response(blkif, req.id, req.operation,
++ BLKIF_RSP_ERROR);
++ free_req(pending_req);
++ break;
+ default:
+ /* A good sign something is wrong: sleep for a while to
+ * avoid excessive CPU consumption by a bad guest. */
+Index: head-2008-11-10/drivers/xen/blkback/common.h
+===================================================================
+--- head-2008-11-10.orig/drivers/xen/blkback/common.h 2008-11-10 12:14:31.000000000 +0100
++++ head-2008-11-10/drivers/xen/blkback/common.h 2008-11-10 12:15:51.000000000 +0100
+@@ -87,6 +87,7 @@ typedef struct blkif_st {
+ int st_wr_req;
+ int st_oo_req;
+ int st_br_req;
++ int st_pk_req;
+ int st_rd_sect;
+ int st_wr_sect;
+
+Index: head-2008-11-10/drivers/xen/blkfront/blkfront.c
+===================================================================
+--- head-2008-11-10.orig/drivers/xen/blkfront/blkfront.c 2008-11-10 12:10:12.000000000 +0100
++++ head-2008-11-10/drivers/xen/blkfront/blkfront.c 2008-11-10 12:15:51.000000000 +0100
+@@ -622,6 +622,8 @@ static int blkif_queue_request(struct re
+ BLKIF_OP_WRITE : BLKIF_OP_READ;
+ if (blk_barrier_rq(req))
+ ring_req->operation = BLKIF_OP_WRITE_BARRIER;
++ if (blk_pc_request(req))
++ ring_req->operation = BLKIF_OP_PACKET;
+
+ ring_req->nr_segments = 0;
+ rq_for_each_segment(bvec, req, iter) {
+@@ -678,7 +680,7 @@ void do_blkif_request(struct request_que
+
+ while ((req = elv_next_request(rq)) != NULL) {
+ info = req->rq_disk->private_data;
+- if (!blk_fs_request(req)) {
++ if (!blk_fs_request(req) && !blk_pc_request(req)) {
+ end_request(req, 0);
+ continue;
+ }
+@@ -755,6 +757,7 @@ static irqreturn_t blkif_int(int irq, vo
+ /* fall through */
+ case BLKIF_OP_READ:
+ case BLKIF_OP_WRITE:
++ case BLKIF_OP_PACKET:
+ if (unlikely(bret->status != BLKIF_RSP_OKAY))
+ DPRINTK("Bad return from blkdev data "
+ "request: %x\n", bret->status);
+Index: head-2008-11-10/drivers/xen/blktap/blktap.c
+===================================================================
+--- head-2008-11-10.orig/drivers/xen/blktap/blktap.c 2008-11-10 12:14:32.000000000 +0100
++++ head-2008-11-10/drivers/xen/blktap/blktap.c 2008-11-10 12:15:51.000000000 +0100
+@@ -1090,13 +1090,14 @@ static void fast_flush_area(pending_req_
+
+ static void print_stats(blkif_t *blkif)
+ {
+- printk(KERN_DEBUG "%s: oo %3d | rd %4d | wr %4d\n",
++ printk(KERN_DEBUG "%s: oo %3d | rd %4d | wr %4d | pk %4d\n",
+ current->comm, blkif->st_oo_req,
+- blkif->st_rd_req, blkif->st_wr_req);
++ blkif->st_rd_req, blkif->st_wr_req, blkif->st_pk_req);
+ blkif->st_print = jiffies + msecs_to_jiffies(10 * 1000);
+ blkif->st_rd_req = 0;
+ blkif->st_wr_req = 0;
+ blkif->st_oo_req = 0;
++ blkif->st_pk_req = 0;
+ }
+
+ int tap_blkif_schedule(void *arg)
+@@ -1332,6 +1333,11 @@ static int do_block_io_op(blkif_t *blkif
+ dispatch_rw_block_io(blkif, &req, pending_req);
+ break;
+
++ case BLKIF_OP_PACKET:
++ blkif->st_pk_req++;
++ dispatch_rw_block_io(blkif, &req, pending_req);
++ break;
++
+ default:
+ /* A good sign something is wrong: sleep for a while to
+ * avoid excessive CPU consumption by a bad guest. */
+@@ -1370,6 +1376,8 @@ static void dispatch_rw_block_io(blkif_t
+ struct mm_struct *mm;
+
+ switch (req->operation) {
++ case BLKIF_OP_PACKET:
++ /* Fall through */
+ case BLKIF_OP_READ:
+ operation = READ;
+ break;
+Index: head-2008-11-10/drivers/xen/blktap/common.h
+===================================================================
+--- head-2008-11-10.orig/drivers/xen/blktap/common.h 2008-11-10 12:06:12.000000000 +0100
++++ head-2008-11-10/drivers/xen/blktap/common.h 2008-11-10 12:15:51.000000000 +0100
+@@ -75,6 +75,7 @@ typedef struct blkif_st {
+ int st_rd_req;
+ int st_wr_req;
+ int st_oo_req;
++ int st_pk_req;
+ int st_rd_sect;
+ int st_wr_sect;
+
+Index: head-2008-11-10/include/xen/interface/io/blkif.h
+===================================================================
+--- head-2008-11-10.orig/include/xen/interface/io/blkif.h 2008-11-10 11:49:25.000000000 +0100
++++ head-2008-11-10/include/xen/interface/io/blkif.h 2008-11-10 12:15:51.000000000 +0100
+@@ -76,6 +76,10 @@
+ * "feature-flush-cache" node!
+ */
+ #define BLKIF_OP_FLUSH_DISKCACHE 3
++/*
++ * Device specific command packet contained within the request
++ */
++#define BLKIF_OP_PACKET 4
+
+ /*
+ * Maximum scatter/gather segments per request.
--- /dev/null
+From: plc@novell.com
+Subject: implement forwarding of CD-ROM specific commands
+Patch-mainline: obsolete
+References: fate#300964
+
+Index: head-2008-10-24/drivers/cdrom/Makefile
+===================================================================
+--- head-2008-10-24.orig/drivers/cdrom/Makefile 2008-10-24 14:05:33.000000000 +0200
++++ head-2008-10-24/drivers/cdrom/Makefile 2008-10-01 16:35:07.000000000 +0200
+@@ -9,6 +9,7 @@ obj-$(CONFIG_BLK_DEV_IDECD) +=
+ obj-$(CONFIG_BLK_DEV_SR) += cdrom.o
+ obj-$(CONFIG_PARIDE_PCD) += cdrom.o
+ obj-$(CONFIG_CDROM_PKTCDVD) += cdrom.o
++obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += cdrom.o
+
+ obj-$(CONFIG_VIOCD) += viocd.o cdrom.o
+ obj-$(CONFIG_GDROM) += gdrom.o cdrom.o
+Index: head-2008-10-24/drivers/xen/blkfront/Makefile
+===================================================================
+--- head-2008-10-24.orig/drivers/xen/blkfront/Makefile 2008-10-24 14:05:33.000000000 +0200
++++ head-2008-10-24/drivers/xen/blkfront/Makefile 2008-10-01 16:35:07.000000000 +0200
+@@ -1,5 +1,5 @@
+
+ obj-$(CONFIG_XEN_BLKDEV_FRONTEND) := xenblk.o
+
+-xenblk-objs := blkfront.o vbd.o
++xenblk-objs := blkfront.o vbd.o vcd.o
+
+Index: head-2008-10-24/drivers/xen/blkfront/blkfront.c
+===================================================================
+--- head-2008-10-24.orig/drivers/xen/blkfront/blkfront.c 2008-10-01 16:35:04.000000000 +0200
++++ head-2008-10-24/drivers/xen/blkfront/blkfront.c 2008-10-01 16:35:07.000000000 +0200
+@@ -372,6 +372,8 @@ static void connect(struct blkfront_info
+ add_disk(info->gd);
+
+ info->is_ready = 1;
++
++ register_vcd(info);
+ }
+
+ /**
+@@ -402,6 +404,8 @@ static void blkfront_closing(struct xenb
+
+ xlvbd_sysfs_delif(info);
+
++ unregister_vcd(info);
++
+ xlvbd_del(info);
+
+ out:
+Index: head-2008-10-24/drivers/xen/blkfront/block.h
+===================================================================
+--- head-2008-10-24.orig/drivers/xen/blkfront/block.h 2008-10-24 14:05:33.000000000 +0200
++++ head-2008-10-24/drivers/xen/blkfront/block.h 2008-10-01 16:35:07.000000000 +0200
+@@ -154,4 +154,8 @@ static inline void xlvbd_sysfs_delif(str
+ }
+ #endif
+
++/* Virtual cdrom block-device */
++extern void register_vcd(struct blkfront_info *info);
++extern void unregister_vcd(struct blkfront_info *info);
++
+ #endif /* __XEN_DRIVERS_BLOCK_H__ */
+Index: head-2008-10-24/drivers/xen/blkfront/vbd.c
+===================================================================
+--- head-2008-10-24.orig/drivers/xen/blkfront/vbd.c 2008-10-24 14:05:33.000000000 +0200
++++ head-2008-10-24/drivers/xen/blkfront/vbd.c 2008-10-24 14:08:33.000000000 +0200
+@@ -281,7 +281,8 @@ xlvbd_add(blkif_sector_t capacity, int v
+ goto out;
+ info->mi = mi;
+
+- if ((minor & ((1 << mi->type->partn_shift) - 1)) == 0)
++ if (!(vdisk_info & VDISK_CDROM) &&
++ (minor & ((1 << mi->type->partn_shift) - 1)) == 0)
+ nr_minors = 1 << mi->type->partn_shift;
+
+ gd = alloc_disk(nr_minors);
+@@ -290,7 +291,7 @@ xlvbd_add(blkif_sector_t capacity, int v
+
+ offset = mi->index * mi->type->disks_per_major +
+ (minor >> mi->type->partn_shift);
+- if (nr_minors > 1) {
++ if (nr_minors > 1 || (vdisk_info & VDISK_CDROM)) {
+ if (offset < 26) {
+ sprintf(gd->disk_name, "%s%c",
+ mi->type->diskname, 'a' + offset );
+Index: head-2008-10-24/drivers/xen/blkfront/vcd.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-10-24/drivers/xen/blkfront/vcd.c 2008-10-01 16:35:07.000000000 +0200
+@@ -0,0 +1,476 @@
++/*******************************************************************************
++* vcd.c
++*
++* Implements CDROM cmd packet passing between frontend guest and backend driver.
++*
++* Copyright (c) 2008, Pat Campell plc@novell.com
++*
++* Permission is hereby granted, free of charge, to any person obtaining a copy
++* of this source file (the "Software"), to deal in the Software without
++* restriction, including without limitation the rights to use, copy, modify,
++* merge, publish, distribute, sublicense, and/or sell copies of the Software,
++* and to permit persons to whom the Software is furnished to do so, subject to
++* the following conditions:
++*
++* The above copyright notice and this permission notice shall be included in
++* all copies or substantial portions of the Software.
++*
++* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++* IN THE SOFTWARE.
++*/
++
++#define REVISION "$Revision: 1.0 $"
++
++#include <linux/module.h>
++#include <linux/blkdev.h>
++#include <linux/list.h>
++#include <linux/cdrom.h>
++#include <xen/interface/io/cdromif.h>
++#include "block.h"
++
++/* List of cdrom_device_info, can have as many as blkfront supports */
++struct vcd_disk {
++ struct list_head vcd_entry;
++ struct cdrom_device_info vcd_cdrom_info;
++ spinlock_t vcd_cdrom_info_lock;
++};
++static LIST_HEAD(vcd_disks);
++static DEFINE_SPINLOCK(vcd_disks_lock);
++
++static struct vcd_disk * xencdrom_get_list_entry(struct gendisk *disk)
++{
++ struct vcd_disk * ret_vcd = NULL;
++ struct vcd_disk * vcd;
++
++ spin_lock(&vcd_disks_lock);
++ list_for_each_entry(vcd, &vcd_disks, vcd_entry) {
++ if (vcd->vcd_cdrom_info.disk == disk) {
++ spin_lock(&vcd->vcd_cdrom_info_lock);
++ ret_vcd = vcd;
++ break;
++ }
++ }
++ spin_unlock(&vcd_disks_lock);
++ return ret_vcd;
++}
++
++static void submit_message(struct blkfront_info *info, void * sp)
++{
++ struct request *req = NULL;
++
++ req = blk_get_request(info->rq, READ, __GFP_WAIT);
++ if (blk_rq_map_kern(info->rq, req, sp, PAGE_SIZE, __GFP_WAIT))
++ goto out;
++
++ req->rq_disk = info->gd;
++#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18)
++ req->cmd_type = REQ_TYPE_BLOCK_PC;
++ req->cmd_flags |= REQ_NOMERGE;
++#else
++ req->flags |= REQ_BLOCK_PC;
++#endif
++ req->sector = 0;
++ req->nr_sectors = 1;
++ req->timeout = 60*HZ;
++
++ blk_execute_rq(req->q, info->gd, req, 1);
++
++out:
++ blk_put_request(req);
++}
++
++static int submit_cdrom_cmd(struct blkfront_info *info,
++ struct packet_command * cgc)
++{
++ int ret = 0;
++ struct page *page;
++ size_t size;
++ union xen_block_packet *sp;
++ struct xen_cdrom_packet *xcp;
++ struct vcd_generic_command * vgc;
++
++ if (cgc->buffer && cgc->buflen > MAX_PACKET_DATA) {
++ printk(KERN_WARNING "%s() Packet buffer length is to large \n", __func__);
++ return -EIO;
++ }
++
++ page = alloc_page(GFP_NOIO);
++ if (!page) {
++ printk(KERN_CRIT "%s() Unable to allocate page\n", __func__);
++ return -ENOMEM;
++ }
++
++ size = PAGE_SIZE;
++ memset(page_address(page), 0, PAGE_SIZE);
++ sp = page_address(page);
++ xcp = &(sp->xcp);
++ xcp->type = XEN_TYPE_CDROM_PACKET;
++ xcp->payload_offset = PACKET_PAYLOAD_OFFSET;
++
++ vgc = (struct vcd_generic_command *)((char *)sp + xcp->payload_offset);
++ memcpy(vgc->cmd, cgc->cmd, CDROM_PACKET_SIZE);
++ vgc->stat = cgc->stat;
++ vgc->data_direction = cgc->data_direction;
++ vgc->quiet = cgc->quiet;
++ vgc->timeout = cgc->timeout;
++ if (cgc->sense) {
++ vgc->sense_offset = PACKET_SENSE_OFFSET;
++ memcpy((char *)sp + vgc->sense_offset, cgc->sense, sizeof(struct request_sense));
++ }
++ if (cgc->buffer) {
++ vgc->buffer_offset = PACKET_BUFFER_OFFSET;
++ memcpy((char *)sp + vgc->buffer_offset, cgc->buffer, cgc->buflen);
++ vgc->buflen = cgc->buflen;
++ }
++
++ submit_message(info,sp);
++
++ if (xcp->ret)
++ ret = xcp->err;
++
++ if (cgc->sense) {
++ memcpy(cgc->sense, (char *)sp + PACKET_SENSE_OFFSET, sizeof(struct request_sense));
++ }
++ if (cgc->buffer && cgc->buflen) {
++ memcpy(cgc->buffer, (char *)sp + PACKET_BUFFER_OFFSET, cgc->buflen);
++ }
++
++ __free_page(page);
++ return ret;
++}
++
++
++static int xencdrom_open(struct cdrom_device_info *cdi, int purpose)
++{
++ int ret = 0;
++ struct page *page;
++ struct blkfront_info *info;
++ union xen_block_packet *sp;
++ struct xen_cdrom_open *xco;
++
++ info = cdi->disk->private_data;
++
++ if (strlen(info->xbdev->otherend) > MAX_PACKET_DATA) {
++ return -EIO;
++ }
++
++ page = alloc_page(GFP_NOIO);
++ if (!page) {
++ printk(KERN_CRIT "%s() Unable to allocate page\n", __func__);
++ return -ENOMEM;
++ }
++
++ memset(page_address(page), 0, PAGE_SIZE);
++ sp = page_address(page);
++ xco = &(sp->xco);
++ xco->type = XEN_TYPE_CDROM_OPEN;
++ xco->payload_offset = sizeof(struct xen_cdrom_open);
++ strcpy((char *)sp + xco->payload_offset, info->xbdev->otherend);
++
++ submit_message(info,sp);
++
++ if (xco->ret) {
++ ret = xco->err;
++ goto out;
++ }
++
++ if (xco->media_present)
++ set_capacity(cdi->disk, xco->sectors);
++
++out:
++ __free_page(page);
++ return ret;
++}
++
++static void xencdrom_release(struct cdrom_device_info *cdi)
++{
++}
++
++static int xencdrom_media_changed(struct cdrom_device_info *cdi, int disc_nr)
++{
++ int ret;
++ struct page *page;
++ struct blkfront_info *info;
++ union xen_block_packet *sp;
++ struct xen_cdrom_media_changed *xcmc;
++
++ info = cdi->disk->private_data;
++
++ page = alloc_page(GFP_NOIO);
++ if (!page) {
++ printk(KERN_CRIT "%s() Unable to allocate page\n", __func__);
++ return -ENOMEM;
++ }
++
++ memset(page_address(page), 0, PAGE_SIZE);
++ sp = page_address(page);
++ xcmc = &(sp->xcmc);
++ xcmc->type = XEN_TYPE_CDROM_MEDIA_CHANGED;
++ submit_message(info,sp);
++ ret = xcmc->media_changed;
++
++ __free_page(page);
++
++ return ret;
++}
++
++static int xencdrom_tray_move(struct cdrom_device_info *cdi, int position)
++{
++ int ret;
++ struct packet_command cgc;
++ struct blkfront_info *info;
++
++ info = cdi->disk->private_data;
++ init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
++ cgc.cmd[0] = GPCMD_START_STOP_UNIT;
++ if (position)
++ cgc.cmd[4] = 2;
++ else
++ cgc.cmd[4] = 3;
++ ret = submit_cdrom_cmd(info, &cgc);
++ return ret;
++}
++
++static int xencdrom_lock_door(struct cdrom_device_info *cdi, int lock)
++{
++ int ret = 0;
++ struct blkfront_info *info;
++ struct packet_command cgc;
++
++ info = cdi->disk->private_data;
++ init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
++ cgc.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
++ cgc.cmd[4] = lock;
++ ret = submit_cdrom_cmd(info, &cgc);
++ return ret;
++}
++
++static int xencdrom_packet(struct cdrom_device_info *cdi,
++ struct packet_command *cgc)
++{
++ int ret = -EIO;
++ struct blkfront_info *info;
++
++ info = cdi->disk->private_data;
++ ret = submit_cdrom_cmd(info, cgc);
++ cgc->stat = ret;
++ return ret;
++}
++
++static int xencdrom_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
++ void *arg)
++{
++ return -EINVAL;
++}
++
++/* Query backend to see if CDROM packets are supported */
++static int xencdrom_supported(struct blkfront_info *info)
++{
++ struct page *page;
++ union xen_block_packet *sp;
++ struct xen_cdrom_support *xcs;
++
++ page = alloc_page(GFP_NOIO);
++ if (!page) {
++ printk(KERN_CRIT "%s() Unable to allocate page\n", __func__);
++ return -ENOMEM;
++ }
++
++ memset(page_address(page), 0, PAGE_SIZE);
++ sp = page_address(page);
++ xcs = &(sp->xcs);
++ xcs->type = XEN_TYPE_CDROM_SUPPORT;
++ submit_message(info,sp);
++ return xcs->supported;
++}
++
++static struct cdrom_device_ops xencdrom_dops = {
++ .open = xencdrom_open,
++ .release = xencdrom_release,
++ .media_changed = xencdrom_media_changed,
++ .tray_move = xencdrom_tray_move,
++ .lock_door = xencdrom_lock_door,
++ .generic_packet = xencdrom_packet,
++ .audio_ioctl = xencdrom_audio_ioctl,
++ .capability = (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | \
++ CDC_MEDIA_CHANGED | CDC_GENERIC_PACKET | CDC_DVD | \
++ CDC_CD_R),
++ .n_minors = 1,
++};
++
++static int xencdrom_block_open(struct inode *inode, struct file *file)
++{
++ struct blkfront_info *info = inode->i_bdev->bd_disk->private_data;
++ struct vcd_disk * vcd;
++ int ret = 0;
++
++ if ((vcd = xencdrom_get_list_entry(info->gd))) {
++ ret = cdrom_open(&vcd->vcd_cdrom_info, inode, file);
++ info->users = vcd->vcd_cdrom_info.use_count;
++ spin_unlock(&vcd->vcd_cdrom_info_lock);
++ }
++ return ret;
++}
++
++static int xencdrom_block_release(struct inode *inode, struct file *file)
++{
++ struct blkfront_info *info = inode->i_bdev->bd_disk->private_data;
++ struct vcd_disk * vcd;
++ int ret = 0;
++
++ if ((vcd = xencdrom_get_list_entry(info->gd))) {
++ ret = cdrom_release(&vcd->vcd_cdrom_info, file);
++ spin_unlock(&vcd->vcd_cdrom_info_lock);
++ if (vcd->vcd_cdrom_info.use_count == 0) {
++ info->users = 1;
++ blkif_release(inode, file);
++ }
++ }
++ return ret;
++}
++
++static int xencdrom_block_ioctl(struct inode *inode, struct file *file,
++ unsigned cmd, unsigned long arg)
++{
++ struct blkfront_info *info = inode->i_bdev->bd_disk->private_data;
++ struct vcd_disk * vcd;
++ int ret = 0;
++
++ if (!(vcd = xencdrom_get_list_entry(info->gd)))
++ goto out;
++
++ switch (cmd) {
++ case 2285: /* SG_IO */
++ ret = -ENOSYS;
++ break;
++ case CDROMEJECT:
++ ret = xencdrom_tray_move(&vcd->vcd_cdrom_info, 1);
++ break;
++ case CDROMCLOSETRAY:
++ ret = xencdrom_tray_move(&vcd->vcd_cdrom_info, 0);
++ break;
++ case CDROM_GET_CAPABILITY:
++ ret = vcd->vcd_cdrom_info.ops->capability & ~vcd->vcd_cdrom_info.mask;
++ break;
++ case CDROM_SET_OPTIONS:
++ ret = vcd->vcd_cdrom_info.options;
++ break;
++ case CDROM_SEND_PACKET:
++ {
++ struct packet_command * cgc = (struct packet_command *)arg;
++ ret = submit_cdrom_cmd(info, cgc);
++ }
++ break;
++ default:
++ /* Not supported, augment supported above if necessary */
++ printk( "%s():%d Unsupported IOCTL:%x \n", __func__, __LINE__, cmd);
++ ret = -ENOTTY;
++ break;
++ }
++ spin_unlock(&vcd->vcd_cdrom_info_lock);
++out:
++ return ret;
++}
++
++/* Called as result of cdrom_open, vcd_cdrom_info_lock already held */
++static int xencdrom_block_media_changed(struct gendisk *disk)
++{
++ struct vcd_disk * vcd;
++ struct vcd_disk * ret_vcd = NULL;
++ int ret = 0;
++
++ spin_lock(&vcd_disks_lock);
++ list_for_each_entry(vcd, &vcd_disks, vcd_entry) {
++ if (vcd->vcd_cdrom_info.disk == disk) {
++ ret_vcd = vcd;
++ break;
++ }
++ }
++ spin_unlock(&vcd_disks_lock);
++ if (ret_vcd) {
++ ret = cdrom_media_changed(&ret_vcd->vcd_cdrom_info);
++ }
++ return ret;
++}
++
++static struct block_device_operations xencdrom_bdops =
++{
++ .owner = THIS_MODULE,
++ .open = xencdrom_block_open,
++ .release = xencdrom_block_release,
++ .ioctl = xencdrom_block_ioctl,
++ .media_changed = xencdrom_block_media_changed,
++};
++
++void register_vcd(struct blkfront_info *info)
++{
++ struct gendisk * gd = info->gd;
++ struct vcd_disk * vcd;
++
++ /* Make sure this is for a CD device */
++ if (!(gd->flags & GENHD_FL_CD))
++ goto out;
++
++ /* Make sure we have backend support */
++ if (!xencdrom_supported(info)) {
++ goto out;
++ }
++
++ /* Create new vcd_disk and fill in cdrom_info */
++ vcd = (struct vcd_disk *)kzalloc(sizeof(struct vcd_disk), GFP_KERNEL);
++ if (!vcd) {
++ printk(KERN_INFO "%s(): Unable to allocate vcd struct!\n", __func__);
++ goto out;
++ }
++ spin_lock_init(&vcd->vcd_cdrom_info_lock);
++
++ vcd->vcd_cdrom_info.ops = &xencdrom_dops;
++ vcd->vcd_cdrom_info.speed = 4;
++ vcd->vcd_cdrom_info.capacity = 1;
++ vcd->vcd_cdrom_info.options = 0;
++ strcpy(vcd->vcd_cdrom_info.name, gd->disk_name);
++ vcd->vcd_cdrom_info.mask = ( CDC_CD_RW | CDC_DVD_R | CDC_DVD_RAM |
++ CDC_SELECT_DISC | CDC_SELECT_SPEED |
++ CDC_MRW | CDC_MRW_W | CDC_RAM);
++
++ if (register_cdrom(&(vcd->vcd_cdrom_info)) != 0) {
++ printk(KERN_WARNING "%s() Cannot register blkdev as a cdrom %d!\n", __func__,
++ gd->major);
++ goto err_out;
++ }
++ xencdrom_bdops.owner = gd->fops->owner;
++ gd->fops = &xencdrom_bdops;
++ vcd->vcd_cdrom_info.disk = gd;
++
++ spin_lock(&vcd_disks_lock);
++ list_add(&(vcd->vcd_entry), &vcd_disks);
++ spin_unlock(&vcd_disks_lock);
++out:
++ return;
++err_out:
++ kfree(vcd);
++}
++
++void unregister_vcd(struct blkfront_info *info) {
++ struct gendisk * gd = info->gd;
++ struct vcd_disk * vcd;
++
++ spin_lock(&vcd_disks_lock);
++ list_for_each_entry(vcd, &vcd_disks, vcd_entry) {
++ if (vcd->vcd_cdrom_info.disk == gd) {
++ spin_lock(&vcd->vcd_cdrom_info_lock);
++ unregister_cdrom(&vcd->vcd_cdrom_info);
++ list_del(&vcd->vcd_entry);
++ spin_unlock(&vcd->vcd_cdrom_info_lock);
++ kfree(vcd);
++ break;
++ }
++ }
++ spin_unlock(&vcd_disks_lock);
++}
++
+Index: head-2008-10-24/include/xen/interface/io/cdromif.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-10-24/include/xen/interface/io/cdromif.h 2008-10-01 16:35:07.000000000 +0200
+@@ -0,0 +1,120 @@
++/******************************************************************************
++ * cdromif.h
++ *
++ * Shared definitions between backend driver and Xen guest Virtual CDROM
++ * block device.
++ *
++ * Copyright (c) 2008, Pat Campell plc@novell.com
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this source file (the "Software"), to deal in the Software without
++ * restriction, including without limitation the rights to use, copy, modify,
++ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
++ * and to permit persons to whom the Software is furnished to do so, subject to
++ * the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in
++ * all copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
++ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
++ * IN THE SOFTWARE.
++ */
++
++#ifndef __XEN_PUBLIC_IO_CDROMIF_H__
++#define __XEN_PUBLIC_IO_CDROMIF_H__
++
++/*
++ * Queries backend for CDROM support
++ */
++#define XEN_TYPE_CDROM_SUPPORT _IO('c', 1)
++
++struct xen_cdrom_support
++{
++ uint32_t type;
++ int8_t ret; /* returned, 0 succeded, -1 error */
++ int8_t err; /* returned, backend errno */
++ int8_t supported; /* returned, 1 supported */
++};
++
++/*
++ * Opens backend device, returns drive geometry or
++ * any encountered errors
++ */
++#define XEN_TYPE_CDROM_OPEN _IO('c', 2)
++
++struct xen_cdrom_open
++{
++ uint32_t type;
++ int8_t ret;
++ int8_t err;
++ int8_t pad;
++ int8_t media_present; /* returned */
++ uint32_t sectors; /* returned */
++ uint32_t sector_size; /* returned */
++ int32_t payload_offset; /* offset to backend node name payload */
++};
++
++/*
++ * Queries backend for media changed status
++ */
++#define XEN_TYPE_CDROM_MEDIA_CHANGED _IO('c', 3)
++
++struct xen_cdrom_media_changed
++{
++ uint32_t type;
++ int8_t ret;
++ int8_t err;
++ int8_t media_changed; /* returned */
++};
++
++/*
++ * Sends vcd generic CDROM packet to backend, followed
++ * immediately by the vcd_generic_command payload
++ */
++#define XEN_TYPE_CDROM_PACKET _IO('c', 4)
++
++struct xen_cdrom_packet
++{
++ uint32_t type;
++ int8_t ret;
++ int8_t err;
++ int8_t pad[2];
++ int32_t payload_offset; /* offset to vcd_generic_command payload */
++};
++
++/* CDROM_PACKET_COMMAND, payload for XEN_TYPE_CDROM_PACKET */
++struct vcd_generic_command
++{
++ uint8_t cmd[CDROM_PACKET_SIZE];
++ uint8_t pad[4];
++ uint32_t buffer_offset;
++ uint32_t buflen;
++ int32_t stat;
++ uint32_t sense_offset;
++ uint8_t data_direction;
++ uint8_t pad1[3];
++ int32_t quiet;
++ int32_t timeout;
++};
++
++union xen_block_packet
++{
++ uint32_t type;
++ struct xen_cdrom_support xcs;
++ struct xen_cdrom_open xco;
++ struct xen_cdrom_media_changed xcmc;
++ struct xen_cdrom_packet xcp;
++};
++
++#define PACKET_PAYLOAD_OFFSET (sizeof(struct xen_cdrom_packet))
++#define PACKET_SENSE_OFFSET (PACKET_PAYLOAD_OFFSET + sizeof(struct vcd_generic_command))
++#define PACKET_BUFFER_OFFSET (PACKET_SENSE_OFFSET + sizeof(struct request_sense))
++#define MAX_PACKET_DATA (PAGE_SIZE - sizeof(struct xen_cdrom_packet) - \
++ sizeof(struct vcd_generic_command) - sizeof(struct request_sense))
++
++#endif
--- /dev/null
+From: jbeulich@novell.com
+Subject: fix placement of some routines/data
+Patch-mainline: obsolete
+
+Index: head-2008-12-01/arch/x86/kernel/e820-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/e820-xen.c 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/e820-xen.c 2008-12-01 12:07:15.000000000 +0100
+@@ -42,7 +42,7 @@
+ * user can e.g. boot the original kernel with mem=1G while still booting the
+ * next kernel with full memory.
+ */
+-struct e820map e820;
++struct e820map __initdata e820;
+ struct e820map e820_saved;
+ #ifdef CONFIG_XEN
+ static struct e820map machine_e820;
+Index: head-2008-12-01/arch/x86/kernel/process_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_32-xen.c 2008-12-01 12:06:01.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_32-xen.c 2008-12-01 12:07:15.000000000 +0100
+@@ -99,7 +99,7 @@ static void cpu_exit_clear(void)
+ }
+ #endif
+
+-static inline void play_dead(void)
++static void __ref play_dead(void)
+ {
+ idle_task_exit();
+ local_irq_disable();
+Index: head-2008-12-01/arch/x86/kernel/process_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/process_64-xen.c 2008-12-01 12:06:01.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/process_64-xen.c 2008-12-01 12:07:15.000000000 +0100
+@@ -95,7 +95,7 @@ void exit_idle(void)
+ }
+
+ #ifdef CONFIG_HOTPLUG_CPU
+-static inline void play_dead(void)
++static void __ref play_dead(void)
+ {
+ idle_task_exit();
+ #ifndef CONFIG_XEN
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-12-01 11:58:30.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 12:07:15.000000000 +0100
+@@ -704,7 +704,7 @@ int xen_update_persistent_clock(void)
+ /* Dynamically-mapped IRQ. */
+ DEFINE_PER_CPU(int, timer_irq);
+
+-static void setup_cpu0_timer_irq(void)
++static void __init setup_cpu0_timer_irq(void)
+ {
+ per_cpu(timer_irq, 0) =
+ bind_virq_to_irqhandler(
+@@ -915,7 +915,7 @@ int __cpuinit local_setup_timer(unsigned
+ return 0;
+ }
+
+-void __cpuexit local_teardown_timer(unsigned int cpu)
++void __cpuinit local_teardown_timer(unsigned int cpu)
+ {
+ BUG_ON(cpu == 0);
+ unbind_from_irqhandler(per_cpu(timer_irq, cpu), NULL);
+Index: head-2008-12-01/arch/x86/mm/ioremap-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/ioremap-xen.c 2008-12-01 12:03:09.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/ioremap-xen.c 2008-12-01 12:07:15.000000000 +0100
+@@ -201,7 +201,8 @@ int touch_pte_range(struct mm_struct *mm
+
+ EXPORT_SYMBOL(touch_pte_range);
+
+-int page_is_ram(unsigned long pagenr)
++#ifdef CONFIG_X86_32
++int __init page_is_ram(unsigned long pagenr)
+ {
+ resource_size_t addr, end;
+ int i;
+@@ -239,6 +240,7 @@ int page_is_ram(unsigned long pagenr)
+ }
+ return 0;
+ }
++#endif
+
+ /*
+ * Fix up the linear direct mapping of the kernel to avoid cache attribute
+Index: head-2008-12-01/drivers/xen/core/cpu_hotplug.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/cpu_hotplug.c 2008-01-21 11:15:26.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/cpu_hotplug.c 2008-12-01 12:07:15.000000000 +0100
+@@ -24,7 +24,7 @@ static int local_cpu_hotplug_request(voi
+ return (current->mm != NULL);
+ }
+
+-static void vcpu_hotplug(unsigned int cpu)
++static void __cpuinit vcpu_hotplug(unsigned int cpu)
+ {
+ int err;
+ char dir[32], state[32];
+@@ -51,7 +51,7 @@ static void vcpu_hotplug(unsigned int cp
+ }
+ }
+
+-static void handle_vcpu_hotplug_event(
++static void __cpuinit handle_vcpu_hotplug_event(
+ struct xenbus_watch *watch, const char **vec, unsigned int len)
+ {
+ unsigned int cpu;
+@@ -80,12 +80,12 @@ static int smpboot_cpu_notify(struct not
+ return NOTIFY_OK;
+ }
+
+-static int setup_cpu_watcher(struct notifier_block *notifier,
+- unsigned long event, void *data)
++static int __cpuinit setup_cpu_watcher(struct notifier_block *notifier,
++ unsigned long event, void *data)
+ {
+ unsigned int i;
+
+- static struct xenbus_watch cpu_watch = {
++ static struct xenbus_watch __cpuinitdata cpu_watch = {
+ .node = "cpu",
+ .callback = handle_vcpu_hotplug_event,
+ .flags = XBWF_new_thread };
+@@ -105,7 +105,7 @@ static int __init setup_vcpu_hotplug_eve
+ {
+ static struct notifier_block hotplug_cpu = {
+ .notifier_call = smpboot_cpu_notify };
+- static struct notifier_block xsn_cpu = {
++ static struct notifier_block __cpuinitdata xsn_cpu = {
+ .notifier_call = setup_cpu_watcher };
+
+ if (!is_running_on_xen())
+@@ -119,7 +119,7 @@ static int __init setup_vcpu_hotplug_eve
+
+ arch_initcall(setup_vcpu_hotplug_event);
+
+-int smp_suspend(void)
++int __ref smp_suspend(void)
+ {
+ unsigned int cpu;
+ int err;
+@@ -140,7 +140,7 @@ int smp_suspend(void)
+ return 0;
+ }
+
+-void smp_resume(void)
++void __ref smp_resume(void)
+ {
+ unsigned int cpu;
+
+Index: head-2008-12-01/drivers/xen/core/smpboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/smpboot.c 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/smpboot.c 2008-12-01 12:07:15.000000000 +0100
+@@ -176,7 +176,7 @@ static int __cpuinit xen_smp_intr_init(u
+ }
+
+ #ifdef CONFIG_HOTPLUG_CPU
+-static void __cpuexit xen_smp_intr_exit(unsigned int cpu)
++static void __cpuinit xen_smp_intr_exit(unsigned int cpu)
+ {
+ if (cpu != 0)
+ local_teardown_timer(cpu);
+@@ -395,7 +395,7 @@ int __cpuexit __cpu_disable(void)
+ return 0;
+ }
+
+-void __cpuexit __cpu_die(unsigned int cpu)
++void __cpuinit __cpu_die(unsigned int cpu)
+ {
+ while (HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL)) {
+ current->state = TASK_UNINTERRUPTIBLE;
--- /dev/null
+From: jbeulich@novell.com
+Subject: add 3.2.0-compatibility configure option
+Patch-mainline: obsolete
+
+Index: head-2008-10-24/drivers/xen/Kconfig
+===================================================================
+--- head-2008-10-24.orig/drivers/xen/Kconfig 2008-10-24 10:46:02.000000000 +0200
++++ head-2008-10-24/drivers/xen/Kconfig 2008-10-24 10:52:17.000000000 +0200
+@@ -267,6 +267,9 @@ choice
+ config XEN_COMPAT_030100_AND_LATER
+ bool "3.1.0 and later"
+
++ config XEN_COMPAT_030200_AND_LATER
++ bool "3.2.0 and later"
++
+ config XEN_COMPAT_LATEST_ONLY
+ bool "no compatibility code"
+
+@@ -275,6 +278,7 @@ endchoice
+ config XEN_COMPAT
+ hex
+ default 0xffffff if XEN_COMPAT_LATEST_ONLY
++ default 0x030200 if XEN_COMPAT_030200_AND_LATER
+ default 0x030100 if XEN_COMPAT_030100_AND_LATER
+ default 0x030004 if XEN_COMPAT_030004_AND_LATER
+ default 0x030002 if XEN_COMPAT_030002_AND_LATER
--- /dev/null
+From: jbeulich@novell.com
+Subject: make /proc/cpuinfo track CPU speed
+Patch-mainline: obsolete
+
+Index: head-2008-10-01/arch/x86/kernel/acpi/processor_extcntl_xen.c
+===================================================================
+--- head-2008-10-01.orig/arch/x86/kernel/acpi/processor_extcntl_xen.c 2008-10-01 15:43:24.000000000 +0200
++++ head-2008-10-01/arch/x86/kernel/acpi/processor_extcntl_xen.c 2008-10-01 16:44:34.000000000 +0200
+@@ -207,3 +207,14 @@ void arch_acpi_processor_init_extcntl(co
+ *ops = &xen_extcntl_ops;
+ }
+ EXPORT_SYMBOL(arch_acpi_processor_init_extcntl);
++
++unsigned int cpufreq_quick_get(unsigned int cpu)
++{
++ xen_platform_op_t op = {
++ .cmd = XENPF_get_cpu_freq,
++ .interface_version = XENPF_INTERFACE_VERSION,
++ .u.get_cpu_freq.vcpu = cpu
++ };
++
++ return HYPERVISOR_platform_op(&op) == 0 ? op.u.get_cpu_freq.freq : 0;
++}
+Index: head-2008-10-01/include/linux/cpufreq.h
+===================================================================
+--- head-2008-10-01.orig/include/linux/cpufreq.h 2008-10-01 14:44:59.000000000 +0200
++++ head-2008-10-01/include/linux/cpufreq.h 2008-10-01 16:44:34.000000000 +0200
+@@ -282,7 +282,7 @@ int cpufreq_update_policy(unsigned int c
+ unsigned int cpufreq_get(unsigned int cpu);
+
+ /* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */
+-#ifdef CONFIG_CPU_FREQ
++#if defined(CONFIG_CPU_FREQ) || defined(CONFIG_PROCESSOR_EXTERNAL_CONTROL)
+ unsigned int cpufreq_quick_get(unsigned int cpu);
+ #else
+ static inline unsigned int cpufreq_quick_get(unsigned int cpu)
+Index: head-2008-10-01/include/xen/interface/platform.h
+===================================================================
+--- head-2008-10-01.orig/include/xen/interface/platform.h 2008-09-25 13:55:33.000000000 +0200
++++ head-2008-10-01/include/xen/interface/platform.h 2008-10-01 16:44:34.000000000 +0200
+@@ -312,6 +312,16 @@ struct xenpf_set_processor_pminfo {
+ typedef struct xenpf_set_processor_pminfo xenpf_set_processor_pminfo_t;
+ DEFINE_XEN_GUEST_HANDLE(xenpf_set_processor_pminfo_t);
+
++#define XENPF_get_cpu_freq ('N' << 24)
++struct xenpf_get_cpu_freq {
++ /* IN variables */
++ uint32_t vcpu;
++ /* OUT variables */
++ uint32_t freq; /* in kHz */
++};
++typedef struct xenpf_get_cpu_freq xenpf_get_cpu_freq_t;
++DEFINE_XEN_GUEST_HANDLE(xenpf_get_cpu_freq_t);
++
+ struct xen_platform_op {
+ uint32_t cmd;
+ uint32_t interface_version; /* XENPF_INTERFACE_VERSION */
+@@ -327,6 +337,7 @@ struct xen_platform_op {
+ struct xenpf_change_freq change_freq;
+ struct xenpf_getidletime getidletime;
+ struct xenpf_set_processor_pminfo set_pminfo;
++ struct xenpf_get_cpu_freq get_cpu_freq;
+ uint8_t pad[128];
+ } u;
+ };
--- /dev/null
+From: jbeulich@novell.com
+Subject: fix issue with Windows-style types used in rt2680
+Patch-mainline: obsolete
+
+Index: head-2008-11-17/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- head-2008-11-17.orig/include/asm-x86/mach-xen/asm/hypervisor.h 2008-11-17 14:06:21.000000000 +0100
++++ head-2008-11-17/include/asm-x86/mach-xen/asm/hypervisor.h 2008-11-18 14:12:19.000000000 +0100
+@@ -340,4 +340,9 @@ MULTI_grant_table_op(multicall_entry_t *
+
+ #endif
+
++#ifdef LINUX
++/* drivers/staging/rt2860/ uses Windows-style types, including VOID */
++#undef VOID
++#endif
++
+ #endif /* __HYPERVISOR_H__ */
--- /dev/null
+From: jbeulich@novell.com
+Subject: use base kernel suspend/resume infrastructure
+Patch-mainline: obsolete
+
+... rather than calling just a few functions explicitly.
+
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-12-01 12:07:15.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 12:07:30.000000000 +0100
+@@ -88,6 +88,10 @@ static DEFINE_PER_CPU(struct vcpu_runsta
+ /* Must be signed, as it's compared with s64 quantities which can be -ve. */
+ #define NS_PER_TICK (1000000000LL/HZ)
+
++static struct vcpu_set_periodic_timer xen_set_periodic_tick = {
++ .period_ns = NS_PER_TICK
++};
++
+ static void __clock_was_set(struct work_struct *unused)
+ {
+ clock_was_set();
+@@ -599,6 +603,25 @@ void mark_tsc_unstable(char *reason)
+ }
+ EXPORT_SYMBOL_GPL(mark_tsc_unstable);
+
++static void init_missing_ticks_accounting(unsigned int cpu)
++{
++ struct vcpu_register_runstate_memory_area area;
++ struct vcpu_runstate_info *runstate = &per_cpu(runstate, cpu);
++ int rc;
++
++ memset(runstate, 0, sizeof(*runstate));
++
++ area.addr.v = runstate;
++ rc = HYPERVISOR_vcpu_op(VCPUOP_register_runstate_memory_area, cpu, &area);
++ WARN_ON(rc && rc != -ENOSYS);
++
++ per_cpu(processed_blocked_time, cpu) =
++ runstate->time[RUNSTATE_blocked];
++ per_cpu(processed_stolen_time, cpu) =
++ runstate->time[RUNSTATE_runnable] +
++ runstate->time[RUNSTATE_offline];
++}
++
+ static cycle_t cs_last;
+
+ static cycle_t xen_clocksource_read(void)
+@@ -635,11 +658,34 @@ static cycle_t xen_clocksource_read(void
+ #endif
+ }
+
++/* No locking required. Interrupts are disabled on all CPUs. */
+ static void xen_clocksource_resume(void)
+ {
+- extern void time_resume(void);
++ unsigned int cpu;
++
++ init_cpu_khz();
++
++ for_each_online_cpu(cpu) {
++ switch (HYPERVISOR_vcpu_op(VCPUOP_set_periodic_timer, cpu,
++ &xen_set_periodic_tick)) {
++ case 0:
++#if CONFIG_XEN_COMPAT <= 0x030004
++ case -ENOSYS:
++#endif
++ break;
++ default:
++ BUG();
++ }
++ get_time_values_from_xen(cpu);
++ per_cpu(processed_system_time, cpu) =
++ per_cpu(shadow_time, 0).system_timestamp;
++ init_missing_ticks_accounting(cpu);
++ }
++
++ processed_system_time = per_cpu(shadow_time, 0).system_timestamp;
++
++ update_wallclock();
+
+- time_resume();
+ cs_last = local_clock();
+ }
+
+@@ -654,25 +700,6 @@ static struct clocksource clocksource_xe
+ .resume = xen_clocksource_resume,
+ };
+
+-static void init_missing_ticks_accounting(unsigned int cpu)
+-{
+- struct vcpu_register_runstate_memory_area area;
+- struct vcpu_runstate_info *runstate = &per_cpu(runstate, cpu);
+- int rc;
+-
+- memset(runstate, 0, sizeof(*runstate));
+-
+- area.addr.v = runstate;
+- rc = HYPERVISOR_vcpu_op(VCPUOP_register_runstate_memory_area, cpu, &area);
+- WARN_ON(rc && rc != -ENOSYS);
+-
+- per_cpu(processed_blocked_time, cpu) =
+- runstate->time[RUNSTATE_blocked];
+- per_cpu(processed_stolen_time, cpu) =
+- runstate->time[RUNSTATE_runnable] +
+- runstate->time[RUNSTATE_offline];
+-}
+-
+ unsigned long xen_read_persistent_clock(void)
+ {
+ const shared_info_t *s = HYPERVISOR_shared_info;
+@@ -717,10 +744,6 @@ static void __init setup_cpu0_timer_irq(
+ BUG_ON(per_cpu(timer_irq, 0) < 0);
+ }
+
+-static struct vcpu_set_periodic_timer xen_set_periodic_tick = {
+- .period_ns = NS_PER_TICK
+-};
+-
+ void __init time_init(void)
+ {
+ init_cpu_khz();
+@@ -844,35 +867,6 @@ void xen_halt(void)
+ }
+ EXPORT_SYMBOL(xen_halt);
+
+-/* No locking required. Interrupts are disabled on all CPUs. */
+-void time_resume(void)
+-{
+- unsigned int cpu;
+-
+- init_cpu_khz();
+-
+- for_each_online_cpu(cpu) {
+- switch (HYPERVISOR_vcpu_op(VCPUOP_set_periodic_timer, cpu,
+- &xen_set_periodic_tick)) {
+- case 0:
+-#if CONFIG_XEN_COMPAT <= 0x030004
+- case -ENOSYS:
+-#endif
+- break;
+- default:
+- BUG();
+- }
+- get_time_values_from_xen(cpu);
+- per_cpu(processed_system_time, cpu) =
+- per_cpu(shadow_time, 0).system_timestamp;
+- init_missing_ticks_accounting(cpu);
+- }
+-
+- processed_system_time = per_cpu(shadow_time, 0).system_timestamp;
+-
+- update_wallclock();
+-}
+-
+ #ifdef CONFIG_SMP
+ static char timer_name[NR_CPUS][15];
+
+Index: head-2008-12-01/drivers/xen/core/evtchn.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/evtchn.c 2008-12-02 09:11:31.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/evtchn.c 2008-12-02 09:23:09.000000000 +0100
+@@ -35,6 +35,7 @@
+ #include <linux/interrupt.h>
+ #include <linux/sched.h>
+ #include <linux/kernel_stat.h>
++#include <linux/sysdev.h>
+ #include <linux/version.h>
+ #include <asm/atomic.h>
+ #include <asm/system.h>
+@@ -1061,9 +1062,20 @@ static void restore_cpu_ipis(unsigned in
+ }
+ }
+
+-void irq_resume(void)
++static int evtchn_resume(struct sys_device *dev)
+ {
+ unsigned int cpu, irq, evtchn;
++ struct evtchn_status status;
++
++ /* Avoid doing anything in the 'suspend cancelled' case. */
++ status.dom = DOMID_SELF;
++ status.port = evtchn_from_irq(__get_cpu_var(virq_to_irq)[VIRQ_TIMER]);
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_status, &status))
++ BUG();
++ if (status.status == EVTCHNSTAT_virq
++ && status.vcpu == smp_processor_id()
++ && status.u.virq == VIRQ_TIMER)
++ return 0;
+
+ init_evtchn_cpu_bindings();
+
+@@ -1094,7 +1106,32 @@ void irq_resume(void)
+ restore_cpu_ipis(cpu);
+ }
+
++ return 0;
++}
++
++static struct sysdev_class evtchn_sysclass = {
++ .name = "evtchn",
++ .resume = evtchn_resume,
++};
++
++static struct sys_device device_evtchn = {
++ .id = 0,
++ .cls = &evtchn_sysclass,
++};
++
++static int __init evtchn_register(void)
++{
++ int err;
++
++ if (is_initial_xendomain())
++ return 0;
++
++ err = sysdev_class_register(&evtchn_sysclass);
++ if (!err)
++ err = sysdev_register(&device_evtchn);
++ return err;
+ }
++core_initcall(evtchn_register);
+ #endif
+
+ #if defined(CONFIG_X86_IO_APIC)
+Index: head-2008-12-01/drivers/xen/core/gnttab.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/gnttab.c 2008-12-02 09:26:17.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/gnttab.c 2008-12-02 09:26:51.000000000 +0100
+@@ -35,6 +35,7 @@
+ #include <linux/sched.h>
+ #include <linux/mm.h>
+ #include <linux/seqlock.h>
++#include <linux/sysdev.h>
+ #include <xen/interface/xen.h>
+ #include <xen/gnttab.h>
+ #include <asm/pgtable.h>
+@@ -704,23 +705,37 @@ EXPORT_SYMBOL(gnttab_post_map_adjust);
+
+ #endif /* __HAVE_ARCH_PTE_SPECIAL */
+
+-int gnttab_resume(void)
++static int gnttab_resume(struct sys_device *dev)
+ {
+ if (max_nr_grant_frames() < nr_grant_frames)
+ return -ENOSYS;
+ return gnttab_map(0, nr_grant_frames - 1);
+ }
++#define gnttab_resume() gnttab_resume(NULL)
+
+ #ifdef CONFIG_PM_SLEEP
+-int gnttab_suspend(void)
+-{
+ #ifdef CONFIG_X86
++static int gnttab_suspend(struct sys_device *dev, pm_message_t state)
++{
+ apply_to_page_range(&init_mm, (unsigned long)shared,
+ PAGE_SIZE * nr_grant_frames,
+ unmap_pte_fn, NULL);
+-#endif
+ return 0;
+ }
++#else
++#define gnttab_suspend NULL
++#endif
++
++static struct sysdev_class gnttab_sysclass = {
++ .name = "gnttab",
++ .resume = gnttab_resume,
++ .suspend = gnttab_suspend,
++};
++
++static struct sys_device device_gnttab = {
++ .id = 0,
++ .cls = &gnttab_sysclass,
++};
+ #endif
+
+ #else /* !CONFIG_XEN */
+@@ -800,6 +815,17 @@ int __devinit gnttab_init(void)
+ if (!is_running_on_xen())
+ return -ENODEV;
+
++#if defined(CONFIG_XEN) && defined(CONFIG_PM_SLEEP)
++ if (!is_initial_xendomain()) {
++ int err = sysdev_class_register(&gnttab_sysclass);
++
++ if (!err)
++ err = sysdev_register(&device_gnttab);
++ if (err)
++ return err;
++ }
++#endif
++
+ nr_grant_frames = 1;
+ boot_max_nr_grant_frames = __max_nr_grant_frames();
+
+Index: head-2008-12-01/drivers/xen/core/machine_reboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/machine_reboot.c 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/machine_reboot.c 2008-12-01 12:07:30.000000000 +0100
+@@ -17,6 +17,7 @@
+ #include <xen/xencons.h>
+ #include <xen/cpu_hotplug.h>
+ #include <xen/interface/vcpu.h>
++#include "../../base/base.h"
+
+ #if defined(__i386__) || defined(__x86_64__)
+
+@@ -149,7 +150,6 @@ static int take_machine_down(void *_susp
+ {
+ struct suspend *suspend = _suspend;
+ int suspend_cancelled, err;
+- extern void time_resume(void);
+
+ if (suspend->fast_suspend) {
+ BUG_ON(!irqs_disabled());
+@@ -175,20 +175,23 @@ static int take_machine_down(void *_susp
+ }
+
+ mm_pin_all();
+- gnttab_suspend();
+- pre_suspend();
+-
+- /*
+- * This hypercall returns 1 if suspend was cancelled or the domain was
+- * merely checkpointed, and 0 if it is resuming in a new domain.
+- */
+- suspend_cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
++ suspend_cancelled = sysdev_suspend(PMSG_FREEZE);
++ if (!suspend_cancelled) {
++ pre_suspend();
+
++ /*
++ * This hypercall returns 1 if suspend was cancelled or the domain was
++ * merely checkpointed, and 0 if it is resuming in a new domain.
++ */
++ suspend_cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
++ } else
++ BUG_ON(suspend_cancelled > 0);
+ suspend->resume_notifier(suspend_cancelled);
+- post_suspend(suspend_cancelled);
+- gnttab_resume();
++ if (suspend_cancelled >= 0) {
++ post_suspend(suspend_cancelled);
++ sysdev_resume();
++ }
+ if (!suspend_cancelled) {
+- irq_resume();
+ #ifdef __x86_64__
+ /*
+ * Older versions of Xen do not save/restore the user %cr3.
+@@ -200,7 +203,6 @@ static int take_machine_down(void *_susp
+ current->active_mm->pgd)));
+ #endif
+ }
+- time_resume();
+
+ if (!suspend->fast_suspend)
+ local_irq_enable();
+Index: head-2008-12-01/include/xen/evtchn.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/evtchn.h 2008-12-02 09:25:52.000000000 +0100
++++ head-2008-12-01/include/xen/evtchn.h 2008-12-01 12:07:30.000000000 +0100
+@@ -93,7 +93,9 @@ int bind_ipi_to_irqhandler(
+ */
+ void unbind_from_irqhandler(unsigned int irq, void *dev_id);
+
++#ifndef CONFIG_XEN
+ void irq_resume(void);
++#endif
+
+ /* Entry point for notifications into Linux subsystems. */
+ asmlinkage void evtchn_do_upcall(struct pt_regs *regs);
+Index: head-2008-12-01/include/xen/gnttab.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/gnttab.h 2008-12-02 09:25:52.000000000 +0100
++++ head-2008-12-01/include/xen/gnttab.h 2008-12-01 12:07:30.000000000 +0100
+@@ -110,8 +110,9 @@ static inline void __gnttab_dma_unmap_pa
+
+ void gnttab_reset_grant_page(struct page *page);
+
+-int gnttab_suspend(void);
++#ifndef CONFIG_XEN
+ int gnttab_resume(void);
++#endif
+
+ void *arch_gnttab_alloc_shared(unsigned long *frames);
+
--- /dev/null
+From: jbeulich@novell.com
+Subject: fold IPIs onto a single IRQ each
+Patch-mainline: obsolete
+
+Index: head-2008-12-01/arch/x86/kernel/genapic_xen_64.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/genapic_xen_64.c 2008-11-25 13:12:11.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/genapic_xen_64.c 2008-12-01 12:07:34.000000000 +0100
+@@ -25,13 +25,9 @@
+ #include <asm/genapic.h>
+ #include <xen/evtchn.h>
+
+-DECLARE_PER_CPU(int, ipi_to_irq[NR_IPIS]);
+-
+ static inline void __send_IPI_one(unsigned int cpu, int vector)
+ {
+- int irq = per_cpu(ipi_to_irq, cpu)[vector];
+- BUG_ON(irq < 0);
+- notify_remote_via_irq(irq);
++ notify_remote_via_ipi(vector, cpu);
+ }
+
+ static void xen_send_IPI_shortcut(unsigned int shortcut,
+Index: head-2008-12-01/arch/x86/kernel/ipi-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/ipi-xen.c 2008-11-25 13:12:11.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/ipi-xen.c 2008-12-01 12:07:34.000000000 +0100
+@@ -48,15 +48,6 @@ static inline int __prepare_ICR2(unsigne
+ }
+ #else
+ #include <xen/evtchn.h>
+-
+-DECLARE_PER_CPU(int, ipi_to_irq[NR_IPIS]);
+-
+-static inline void __send_IPI_one(unsigned int cpu, int vector)
+-{
+- int irq = per_cpu(ipi_to_irq, cpu)[vector];
+- BUG_ON(irq < 0);
+- notify_remote_via_irq(irq);
+-}
+ #endif
+
+ void __send_IPI_shortcut(unsigned int shortcut, int vector)
+@@ -90,12 +81,12 @@ void __send_IPI_shortcut(unsigned int sh
+
+ switch (shortcut) {
+ case APIC_DEST_SELF:
+- __send_IPI_one(smp_processor_id(), vector);
++ notify_remote_via_ipi(vector, smp_processor_id());
+ break;
+ case APIC_DEST_ALLBUT:
+ for_each_online_cpu(cpu)
+ if (cpu != smp_processor_id())
+- __send_IPI_one(cpu, vector);
++ notify_remote_via_ipi(vector, cpu);
+ break;
+ default:
+ printk("XXXXXX __send_IPI_shortcut %08x vector %d\n", shortcut,
+@@ -165,7 +156,7 @@ void send_IPI_mask_bitmask(const cpumask
+ WARN_ON(!cpus_empty(mask));
+ for_each_online_cpu(cpu)
+ if (cpu_isset(cpu, cpumask))
+- __send_IPI_one(cpu, vector);
++ notify_remote_via_ipi(vector, cpu);
+ #endif
+ local_irq_restore(flags);
+ }
+Index: head-2008-12-01/arch/x86/kernel/irq_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_32-xen.c 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_32-xen.c 2008-12-01 12:07:34.000000000 +0100
+@@ -404,6 +404,9 @@ void fixup_irqs(cpumask_t map)
+ if (irq == 2)
+ continue;
+
++ if (irq_desc[irq].status & IRQ_PER_CPU)
++ continue;
++
+ cpus_and(mask, irq_desc[irq].affinity, map);
+ if (any_online_cpu(mask) == NR_CPUS) {
+ /*printk("Breaking affinity for irq %i\n", irq);*/
+Index: head-2008-12-01/arch/x86/kernel/irq_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/irq_64-xen.c 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/irq_64-xen.c 2008-12-01 12:07:34.000000000 +0100
+@@ -245,6 +245,7 @@ void fixup_irqs(cpumask_t map)
+ spin_lock(&irq_desc[irq].lock);
+
+ if (!irq_has_action(irq) ||
++ (irq_desc[irq].status & IRQ_PER_CPU) ||
+ cpus_equal(irq_desc[irq].affinity, map)) {
+ spin_unlock(&irq_desc[irq].lock);
+ continue;
+Index: head-2008-12-01/drivers/xen/Kconfig
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/Kconfig 2008-10-24 10:52:17.000000000 +0200
++++ head-2008-12-01/drivers/xen/Kconfig 2008-12-01 12:07:34.000000000 +0100
+@@ -4,6 +4,7 @@
+
+ config XEN
+ bool
++ select IRQ_PER_CPU if SMP
+
+ if XEN
+ config XEN_INTERFACE_VERSION
+@@ -292,6 +293,9 @@ config HAVE_IRQ_IGNORE_UNHANDLED
+ config GENERIC_HARDIRQS_NO__DO_IRQ
+ def_bool y
+
++config IRQ_PER_CPU
++ bool
++
+ config NO_IDLE_HZ
+ def_bool y
+
+Index: head-2008-12-01/drivers/xen/core/evtchn.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/evtchn.c 2008-12-02 09:14:14.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/evtchn.c 2008-12-02 09:14:29.000000000 +0100
+@@ -57,6 +57,22 @@ static DEFINE_SPINLOCK(irq_mapping_updat
+ static int evtchn_to_irq[NR_EVENT_CHANNELS] = {
+ [0 ... NR_EVENT_CHANNELS-1] = -1 };
+
++/* IRQ <-> IPI mapping. */
++#ifndef NR_IPIS
++#define NR_IPIS 1
++#endif
++#if defined(CONFIG_SMP) && defined(CONFIG_X86)
++static int ipi_to_irq[NR_IPIS] __read_mostly = {[0 ... NR_IPIS-1] = -1};
++static DEFINE_PER_CPU(int[NR_IPIS], ipi_to_evtchn) = {[0 ... NR_IPIS-1] = -1};
++#else
++#define PER_CPU_IPI_IRQ
++#endif
++#if !defined(CONFIG_SMP) || !defined(PER_CPU_IPI_IRQ)
++#define BUG_IF_IPI(irq) BUG_ON(type_from_irq(irq) == IRQT_IPI)
++#else
++#define BUG_IF_IPI(irq) ((void)(irq))
++#endif
++
+ /* Packed IRQ information: binding type, sub-type index, and event channel. */
+ static u32 irq_info[NR_IRQS];
+
+@@ -97,10 +113,12 @@ static inline u32 mk_irq_info(u32 type,
+ * Accessors for packed IRQ information.
+ */
+
++#ifdef PER_CPU_IPI_IRQ
+ static inline unsigned int evtchn_from_irq(int irq)
+ {
+ return irq_info[irq] & ((1U << _EVTCHN_BITS) - 1);
+ }
++#endif
+
+ static inline unsigned int index_from_irq(int irq)
+ {
+@@ -112,14 +130,28 @@ static inline unsigned int type_from_irq
+ return irq_info[irq] >> (32 - _IRQT_BITS);
+ }
+
++#ifndef PER_CPU_IPI_IRQ
++static inline unsigned int evtchn_from_per_cpu_irq(unsigned int irq, unsigned int cpu)
++{
++ BUG_ON(type_from_irq(irq) != IRQT_IPI);
++ return per_cpu(ipi_to_evtchn, cpu)[index_from_irq(irq)];
++}
++
++static inline unsigned int evtchn_from_irq(unsigned int irq)
++{
++ if (type_from_irq(irq) != IRQT_IPI)
++ return irq_info[irq] & ((1U << _EVTCHN_BITS) - 1);
++ return evtchn_from_per_cpu_irq(irq, smp_processor_id());
++}
++#endif
++
+ /* IRQ <-> VIRQ mapping. */
+ DEFINE_PER_CPU(int, virq_to_irq[NR_VIRQS]) = {[0 ... NR_VIRQS-1] = -1};
+
++#if defined(CONFIG_SMP) && defined(PER_CPU_IPI_IRQ)
+ /* IRQ <-> IPI mapping. */
+-#ifndef NR_IPIS
+-#define NR_IPIS 1
+-#endif
+ DEFINE_PER_CPU(int, ipi_to_irq[NR_IPIS]) = {[0 ... NR_IPIS-1] = -1};
++#endif
+
+ /* Reference counts for bindings to IRQs. */
+ static int irq_bindcount[NR_IRQS];
+@@ -144,8 +176,14 @@ static void bind_evtchn_to_cpu(unsigned
+
+ BUG_ON(!test_bit(chn, s->evtchn_mask));
+
+- if (irq != -1)
+- irq_desc[irq].affinity = cpumask_of_cpu(cpu);
++ if (irq != -1) {
++ struct irq_desc *desc = irq_desc + irq;
++
++ if (!(desc->status & IRQ_PER_CPU))
++ desc->affinity = cpumask_of_cpu(cpu);
++ else
++ cpu_set(cpu, desc->affinity);
++ }
+
+ clear_bit(chn, (unsigned long *)cpu_evtchn_mask[cpu_evtchn[chn]]);
+ set_bit(chn, (unsigned long *)cpu_evtchn_mask[cpu]);
+@@ -439,6 +477,7 @@ static int bind_virq_to_irq(unsigned int
+ return irq;
+ }
+
++#if defined(CONFIG_SMP) && defined(PER_CPU_IPI_IRQ)
+ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
+ {
+ struct evtchn_bind_ipi bind_ipi;
+@@ -470,6 +509,7 @@ static int bind_ipi_to_irq(unsigned int
+ spin_unlock(&irq_mapping_update_lock);
+ return irq;
+ }
++#endif
+
+ static void unbind_from_irq(unsigned int irq)
+ {
+@@ -477,6 +517,7 @@ static void unbind_from_irq(unsigned int
+ unsigned int cpu;
+ int evtchn = evtchn_from_irq(irq);
+
++ BUG_IF_IPI(irq);
+ spin_lock(&irq_mapping_update_lock);
+
+ if ((--irq_bindcount[irq] == 0) && VALID_EVTCHN(evtchn)) {
+@@ -490,10 +531,12 @@ static void unbind_from_irq(unsigned int
+ per_cpu(virq_to_irq, cpu_from_evtchn(evtchn))
+ [index_from_irq(irq)] = -1;
+ break;
++#if defined(CONFIG_SMP) && defined(PER_CPU_IPI_IRQ)
+ case IRQT_IPI:
+ per_cpu(ipi_to_irq, cpu_from_evtchn(evtchn))
+ [index_from_irq(irq)] = -1;
+ break;
++#endif
+ default:
+ break;
+ }
+@@ -512,6 +555,46 @@ static void unbind_from_irq(unsigned int
+ spin_unlock(&irq_mapping_update_lock);
+ }
+
++#if defined(CONFIG_SMP) && !defined(PER_CPU_IPI_IRQ)
++void unbind_from_per_cpu_irq(unsigned int irq, unsigned int cpu)
++{
++ struct evtchn_close close;
++ int evtchn = evtchn_from_per_cpu_irq(irq, cpu);
++
++ spin_lock(&irq_mapping_update_lock);
++
++ if (VALID_EVTCHN(evtchn)) {
++ struct irq_desc *desc = irq_desc + irq;
++
++ mask_evtchn(evtchn);
++
++ BUG_ON(irq_bindcount[irq] <= 1);
++ irq_bindcount[irq]--;
++ cpu_clear(cpu, desc->affinity);
++
++ close.port = evtchn;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close))
++ BUG();
++
++ switch (type_from_irq(irq)) {
++ case IRQT_IPI:
++ per_cpu(ipi_to_evtchn, cpu)[index_from_irq(irq)] = -1;
++ break;
++ default:
++ BUG();
++ break;
++ }
++
++ /* Closed ports are implicitly re-bound to VCPU0. */
++ bind_evtchn_to_cpu(evtchn, 0);
++
++ evtchn_to_irq[evtchn] = -1;
++ }
++
++ spin_unlock(&irq_mapping_update_lock);
++}
++#endif /* CONFIG_SMP && !PER_CPU_IPI_IRQ */
++
+ int bind_caller_port_to_irqhandler(
+ unsigned int caller_port,
+ irq_handler_t handler,
+@@ -606,6 +689,8 @@ int bind_virq_to_irqhandler(
+ }
+ EXPORT_SYMBOL_GPL(bind_virq_to_irqhandler);
+
++#ifdef CONFIG_SMP
++#ifdef PER_CPU_IPI_IRQ
+ int bind_ipi_to_irqhandler(
+ unsigned int ipi,
+ unsigned int cpu,
+@@ -628,7 +713,72 @@ int bind_ipi_to_irqhandler(
+
+ return irq;
+ }
+-EXPORT_SYMBOL_GPL(bind_ipi_to_irqhandler);
++#else
++int __cpuinit bind_ipi_to_irqaction(
++ unsigned int ipi,
++ unsigned int cpu,
++ struct irqaction *action)
++{
++ struct evtchn_bind_ipi bind_ipi;
++ int evtchn, irq, retval = 0;
++
++ spin_lock(&irq_mapping_update_lock);
++
++ if (per_cpu(ipi_to_evtchn, cpu)[ipi] != -1) {
++ spin_unlock(&irq_mapping_update_lock);
++ return -EBUSY;
++ }
++
++ if ((irq = ipi_to_irq[ipi]) == -1) {
++ if ((irq = find_unbound_irq()) < 0) {
++ spin_unlock(&irq_mapping_update_lock);
++ return irq;
++ }
++
++ /* Extra reference so count will never drop to zero. */
++ irq_bindcount[irq]++;
++
++ ipi_to_irq[ipi] = irq;
++ irq_info[irq] = mk_irq_info(IRQT_IPI, ipi, 0);
++ irq_desc[irq].handle_irq = handle_percpu_irq;
++ retval = 1;
++ }
++
++ bind_ipi.vcpu = cpu;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
++ &bind_ipi) != 0)
++ BUG();
++
++ evtchn = bind_ipi.port;
++ evtchn_to_irq[evtchn] = irq;
++ per_cpu(ipi_to_evtchn, cpu)[ipi] = evtchn;
++
++ bind_evtchn_to_cpu(evtchn, cpu);
++
++ irq_bindcount[irq]++;
++
++ spin_unlock(&irq_mapping_update_lock);
++
++ if (retval == 0) {
++ unsigned long flags;
++
++ local_irq_save(flags);
++ unmask_evtchn(evtchn);
++ local_irq_restore(flags);
++ } else {
++ action->flags |= IRQF_PERCPU;
++ retval = setup_irq(irq, action);
++ if (retval) {
++ unbind_from_per_cpu_irq(irq, cpu);
++ BUG_ON(retval > 0);
++ irq = retval;
++ }
++ }
++
++ return irq;
++}
++#endif /* PER_CPU_IPI_IRQ */
++#endif /* CONFIG_SMP */
+
+ void unbind_from_irqhandler(unsigned int irq, void *dev_id)
+ {
+@@ -654,6 +804,7 @@ static void rebind_irq_to_cpu(unsigned i
+ {
+ int evtchn = evtchn_from_irq(irq);
+
++ BUG_IF_IPI(irq);
+ if (VALID_EVTCHN(evtchn))
+ rebind_evtchn_to_cpu(evtchn, tcpu);
+ }
+@@ -737,6 +888,7 @@ static struct irq_chip dynirq_chip = {
+ .unmask = unmask_dynirq,
+ .mask_ack = ack_dynirq,
+ .ack = ack_dynirq,
++ .eoi = end_dynirq,
+ .end = end_dynirq,
+ #ifdef CONFIG_SMP
+ .set_affinity = set_affinity_irq,
+@@ -909,10 +1061,21 @@ int irq_ignore_unhandled(unsigned int ir
+ return !!(irq_status.flags & XENIRQSTAT_shared);
+ }
+
++#if defined(CONFIG_SMP) && !defined(PER_CPU_IPI_IRQ)
++void notify_remote_via_ipi(unsigned int ipi, unsigned int cpu)
++{
++ int evtchn = evtchn_from_per_cpu_irq(ipi_to_irq[ipi], cpu);
++
++ if (VALID_EVTCHN(evtchn))
++ notify_remote_via_evtchn(evtchn);
++}
++#endif
++
+ void notify_remote_via_irq(int irq)
+ {
+ int evtchn = evtchn_from_irq(irq);
+
++ BUG_IF_IPI(irq);
+ if (VALID_EVTCHN(evtchn))
+ notify_remote_via_evtchn(evtchn);
+ }
+@@ -920,6 +1083,7 @@ EXPORT_SYMBOL_GPL(notify_remote_via_irq)
+
+ int irq_to_evtchn_port(int irq)
+ {
++ BUG_IF_IPI(irq);
+ return evtchn_from_irq(irq);
+ }
+ EXPORT_SYMBOL_GPL(irq_to_evtchn_port);
+@@ -1035,11 +1199,16 @@ static void restore_cpu_virqs(unsigned i
+
+ static void restore_cpu_ipis(unsigned int cpu)
+ {
++#ifdef CONFIG_SMP
+ struct evtchn_bind_ipi bind_ipi;
+ int ipi, irq, evtchn;
+
+ for (ipi = 0; ipi < NR_IPIS; ipi++) {
++#ifdef PER_CPU_IPI_IRQ
+ if ((irq = per_cpu(ipi_to_irq, cpu)[ipi]) == -1)
++#else
++ if ((irq = ipi_to_irq[ipi]) == -1)
++#endif
+ continue;
+
+ BUG_ON(irq_info[irq] != mk_irq_info(IRQT_IPI, ipi, 0));
+@@ -1053,13 +1222,17 @@ static void restore_cpu_ipis(unsigned in
+
+ /* Record the new mapping. */
+ evtchn_to_irq[evtchn] = irq;
++#ifdef PER_CPU_IPI_IRQ
+ irq_info[irq] = mk_irq_info(IRQT_IPI, ipi, evtchn);
++#else
++ per_cpu(ipi_to_evtchn, cpu)[ipi] = evtchn;
++#endif
+ bind_evtchn_to_cpu(evtchn, cpu);
+
+ /* Ready for use. */
+ unmask_evtchn(evtchn);
+-
+ }
++#endif
+ }
+
+ static int evtchn_resume(struct sys_device *dev)
+@@ -1103,8 +1276,17 @@ static int evtchn_resume(struct sys_devi
+
+ for_each_possible_cpu(cpu) {
+ restore_cpu_virqs(cpu);
++#ifdef PER_CPU_IPI_IRQ
+ restore_cpu_ipis(cpu);
++#else
++ /* No IPI <-> event-channel mappings. */
++ for (irq = 0; irq < NR_IPIS; ++irq)
++ per_cpu(ipi_to_evtchn, cpu)[irq] = -1;
++#endif
+ }
++#ifndef PER_CPU_IPI_IRQ
++ restore_cpu_ipis(smp_processor_id());
++#endif
+
+ return 0;
+ }
+Index: head-2008-12-01/drivers/xen/core/smpboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/smpboot.c 2008-12-01 12:07:15.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/smpboot.c 2008-12-01 12:07:34.000000000 +0100
+@@ -53,12 +53,9 @@ EXPORT_PER_CPU_SYMBOL(cpu_info);
+ DEFINE_PER_CPU(int, cpu_state) = { 0 };
+ #endif
+
+-static DEFINE_PER_CPU(int, resched_irq);
+-static DEFINE_PER_CPU(int, callfunc_irq);
+-static DEFINE_PER_CPU(int, call1func_irq);
+-static char resched_name[NR_CPUS][15];
+-static char callfunc_name[NR_CPUS][15];
+-static char call1func_name[NR_CPUS][15];
++static int __read_mostly resched_irq = -1;
++static int __read_mostly callfunc_irq = -1;
++static int __read_mostly call1func_irq = -1;
+
+ #ifdef CONFIG_X86_LOCAL_APIC
+ #define set_cpu_to_apicid(cpu, apicid) (per_cpu(x86_cpu_to_apicid, cpu) = (apicid))
+@@ -117,43 +114,50 @@ remove_siblinginfo(unsigned int cpu)
+
+ static int __cpuinit xen_smp_intr_init(unsigned int cpu)
+ {
++ static struct irqaction resched_action = {
++ .handler = smp_reschedule_interrupt,
++ .flags = IRQF_DISABLED,
++ .name = "resched"
++ }, callfunc_action = {
++ .handler = smp_call_function_interrupt,
++ .flags = IRQF_DISABLED,
++ .name = "callfunc"
++ }, call1func_action = {
++ .handler = smp_call_function_single_interrupt,
++ .flags = IRQF_DISABLED,
++ .name = "call1func"
++ };
+ int rc;
+
+- per_cpu(resched_irq, cpu) = per_cpu(callfunc_irq, cpu) =
+- per_cpu(call1func_irq, cpu) = -1;
+-
+- sprintf(resched_name[cpu], "resched%u", cpu);
+- rc = bind_ipi_to_irqhandler(RESCHEDULE_VECTOR,
+- cpu,
+- smp_reschedule_interrupt,
+- IRQF_DISABLED|IRQF_NOBALANCING,
+- resched_name[cpu],
+- NULL);
++ rc = bind_ipi_to_irqaction(RESCHEDULE_VECTOR,
++ cpu,
++ &resched_action);
+ if (rc < 0)
+ goto fail;
+- per_cpu(resched_irq, cpu) = rc;
+-
+- sprintf(callfunc_name[cpu], "callfunc%u", cpu);
+- rc = bind_ipi_to_irqhandler(CALL_FUNCTION_VECTOR,
+- cpu,
+- smp_call_function_interrupt,
+- IRQF_DISABLED|IRQF_NOBALANCING,
+- callfunc_name[cpu],
+- NULL);
++ if (resched_irq < 0)
++ resched_irq = rc;
++ else
++ BUG_ON(resched_irq != rc);
++
++ rc = bind_ipi_to_irqaction(CALL_FUNCTION_VECTOR,
++ cpu,
++ &callfunc_action);
+ if (rc < 0)
+ goto fail;
+- per_cpu(callfunc_irq, cpu) = rc;
+-
+- sprintf(call1func_name[cpu], "call1func%u", cpu);
+- rc = bind_ipi_to_irqhandler(CALL_FUNC_SINGLE_VECTOR,
+- cpu,
+- smp_call_function_single_interrupt,
+- IRQF_DISABLED|IRQF_NOBALANCING,
+- call1func_name[cpu],
+- NULL);
++ if (callfunc_irq < 0)
++ callfunc_irq = rc;
++ else
++ BUG_ON(callfunc_irq != rc);
++
++ rc = bind_ipi_to_irqaction(CALL_FUNC_SINGLE_VECTOR,
++ cpu,
++ &call1func_action);
+ if (rc < 0)
+ goto fail;
+- per_cpu(call1func_irq, cpu) = rc;
++ if (call1func_irq < 0)
++ call1func_irq = rc;
++ else
++ BUG_ON(call1func_irq != rc);
+
+ rc = xen_spinlock_init(cpu);
+ if (rc < 0)
+@@ -165,12 +169,12 @@ static int __cpuinit xen_smp_intr_init(u
+ return 0;
+
+ fail:
+- if (per_cpu(resched_irq, cpu) >= 0)
+- unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
+- if (per_cpu(callfunc_irq, cpu) >= 0)
+- unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
+- if (per_cpu(call1func_irq, cpu) >= 0)
+- unbind_from_irqhandler(per_cpu(call1func_irq, cpu), NULL);
++ if (resched_irq >= 0)
++ unbind_from_per_cpu_irq(resched_irq, cpu);
++ if (callfunc_irq >= 0)
++ unbind_from_per_cpu_irq(callfunc_irq, cpu);
++ if (call1func_irq >= 0)
++ unbind_from_per_cpu_irq(call1func_irq, cpu);
+ xen_spinlock_cleanup(cpu);
+ return rc;
+ }
+@@ -181,9 +185,9 @@ static void __cpuinit xen_smp_intr_exit(
+ if (cpu != 0)
+ local_teardown_timer(cpu);
+
+- unbind_from_irqhandler(per_cpu(resched_irq, cpu), NULL);
+- unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
+- unbind_from_irqhandler(per_cpu(call1func_irq, cpu), NULL);
++ unbind_from_per_cpu_irq(resched_irq, cpu);
++ unbind_from_per_cpu_irq(callfunc_irq, cpu);
++ unbind_from_per_cpu_irq(call1func_irq, cpu);
+ xen_spinlock_cleanup(cpu);
+ }
+ #endif
+Index: head-2008-12-01/drivers/xen/core/spinlock.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/spinlock.c 2008-12-01 11:51:53.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/spinlock.c 2008-12-01 12:07:34.000000000 +0100
+@@ -14,8 +14,7 @@
+
+ extern irqreturn_t smp_reschedule_interrupt(int, void *);
+
+-static DEFINE_PER_CPU(int, spinlock_irq) = -1;
+-static char spinlock_name[NR_CPUS][15];
++static int __read_mostly spinlock_irq = -1;
+
+ struct spinning {
+ raw_spinlock_t *lock;
+@@ -32,34 +31,37 @@ static DEFINE_PER_CPU(raw_rwlock_t, spin
+
+ int __cpuinit xen_spinlock_init(unsigned int cpu)
+ {
++ static struct irqaction spinlock_action = {
++ .handler = smp_reschedule_interrupt,
++ .flags = IRQF_DISABLED,
++ .name = "spinlock"
++ };
+ int rc;
+
+- sprintf(spinlock_name[cpu], "spinlock%u", cpu);
+- rc = bind_ipi_to_irqhandler(SPIN_UNLOCK_VECTOR,
+- cpu,
+- smp_reschedule_interrupt,
+- IRQF_DISABLED|IRQF_NOBALANCING,
+- spinlock_name[cpu],
+- NULL);
++ rc = bind_ipi_to_irqaction(SPIN_UNLOCK_VECTOR,
++ cpu,
++ &spinlock_action);
+ if (rc < 0)
+ return rc;
+
+- disable_irq(rc); /* make sure it's never delivered */
+- per_cpu(spinlock_irq, cpu) = rc;
++ if (spinlock_irq < 0) {
++ disable_irq(rc); /* make sure it's never delivered */
++ spinlock_irq = rc;
++ } else
++ BUG_ON(spinlock_irq != rc);
+
+ return 0;
+ }
+
+ void __cpuinit xen_spinlock_cleanup(unsigned int cpu)
+ {
+- if (per_cpu(spinlock_irq, cpu) >= 0)
+- unbind_from_irqhandler(per_cpu(spinlock_irq, cpu), NULL);
+- per_cpu(spinlock_irq, cpu) = -1;
++ if (spinlock_irq >= 0)
++ unbind_from_per_cpu_irq(spinlock_irq, cpu);
+ }
+
+ int xen_spin_wait(raw_spinlock_t *lock, unsigned int token)
+ {
+- int rc = 0, irq = __get_cpu_var(spinlock_irq);
++ int rc = 0, irq = spinlock_irq;
+ raw_rwlock_t *rm_lock;
+ unsigned long flags;
+ struct spinning spinning;
+@@ -153,7 +155,7 @@ void xen_spin_kick(raw_spinlock_t *lock,
+ raw_local_irq_restore(flags);
+
+ if (unlikely(spinning)) {
+- notify_remote_via_irq(per_cpu(spinlock_irq, cpu));
++ notify_remote_via_ipi(SPIN_UNLOCK_VECTOR, cpu);
+ return;
+ }
+ }
+Index: head-2008-12-01/include/xen/evtchn.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/evtchn.h 2008-12-01 12:07:30.000000000 +0100
++++ head-2008-12-01/include/xen/evtchn.h 2008-12-01 12:07:34.000000000 +0100
+@@ -78,6 +78,8 @@ int bind_virq_to_irqhandler(
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
++#if defined(CONFIG_SMP) && !defined(MODULE)
++#ifndef CONFIG_X86
+ int bind_ipi_to_irqhandler(
+ unsigned int ipi,
+ unsigned int cpu,
+@@ -85,6 +87,13 @@ int bind_ipi_to_irqhandler(
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
++#else
++int bind_ipi_to_irqaction(
++ unsigned int ipi,
++ unsigned int cpu,
++ struct irqaction *action);
++#endif
++#endif
+
+ /*
+ * Common unbind function for all event sources. Takes IRQ to unbind from.
+@@ -93,6 +102,11 @@ int bind_ipi_to_irqhandler(
+ */
+ void unbind_from_irqhandler(unsigned int irq, void *dev_id);
+
++#if defined(CONFIG_SMP) && !defined(MODULE) && defined(CONFIG_X86)
++/* Specialized unbind function for per-CPU IRQs. */
++void unbind_from_per_cpu_irq(unsigned int irq, unsigned int cpu);
++#endif
++
+ #ifndef CONFIG_XEN
+ void irq_resume(void);
+ #endif
+@@ -184,4 +198,8 @@ int clear_pirq_hw_action(int pirq);
+ #define PIRQ_END 5
+ #define PIRQ_ACK 6
+
++#if defined(CONFIG_SMP) && !defined(MODULE) && defined(CONFIG_X86)
++void notify_remote_via_ipi(unsigned int ipi, unsigned int cpu);
++#endif
++
+ #endif /* __ASM_EVTCHN_H__ */
--- /dev/null
+From: jbeulich@novell.com
+Subject: fold per-CPU VIRQs onto a single IRQ each
+Patch-mainline: obsolete
+
+Index: head-2008-12-01/arch/x86/kernel/time_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/time_32-xen.c 2008-12-01 12:07:30.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/time_32-xen.c 2008-12-01 12:08:40.000000000 +0100
+@@ -729,19 +729,17 @@ int xen_update_persistent_clock(void)
+ }
+
+ /* Dynamically-mapped IRQ. */
+-DEFINE_PER_CPU(int, timer_irq);
++static int __read_mostly timer_irq = -1;
++static struct irqaction timer_action = {
++ .handler = timer_interrupt,
++ .flags = IRQF_DISABLED,
++ .name = "timer"
++};
+
+ static void __init setup_cpu0_timer_irq(void)
+ {
+- per_cpu(timer_irq, 0) =
+- bind_virq_to_irqhandler(
+- VIRQ_TIMER,
+- 0,
+- timer_interrupt,
+- IRQF_DISABLED|IRQF_NOBALANCING,
+- "timer0",
+- NULL);
+- BUG_ON(per_cpu(timer_irq, 0) < 0);
++ timer_irq = bind_virq_to_irqaction(VIRQ_TIMER, 0, &timer_action);
++ BUG_ON(timer_irq < 0);
+ }
+
+ void __init time_init(void)
+@@ -868,8 +866,6 @@ void xen_halt(void)
+ EXPORT_SYMBOL(xen_halt);
+
+ #ifdef CONFIG_SMP
+-static char timer_name[NR_CPUS][15];
+-
+ int __cpuinit local_setup_timer(unsigned int cpu)
+ {
+ int seq, irq;
+@@ -895,16 +891,10 @@ int __cpuinit local_setup_timer(unsigned
+ init_missing_ticks_accounting(cpu);
+ } while (read_seqretry(&xtime_lock, seq));
+
+- sprintf(timer_name[cpu], "timer%u", cpu);
+- irq = bind_virq_to_irqhandler(VIRQ_TIMER,
+- cpu,
+- timer_interrupt,
+- IRQF_DISABLED|IRQF_NOBALANCING,
+- timer_name[cpu],
+- NULL);
++ irq = bind_virq_to_irqaction(VIRQ_TIMER, cpu, &timer_action);
+ if (irq < 0)
+ return irq;
+- per_cpu(timer_irq, cpu) = irq;
++ BUG_ON(timer_irq != irq);
+
+ return 0;
+ }
+@@ -912,7 +902,7 @@ int __cpuinit local_setup_timer(unsigned
+ void __cpuinit local_teardown_timer(unsigned int cpu)
+ {
+ BUG_ON(cpu == 0);
+- unbind_from_irqhandler(per_cpu(timer_irq, cpu), NULL);
++ unbind_from_per_cpu_irq(timer_irq, cpu, &timer_action);
+ }
+ #endif
+
+Index: head-2008-12-01/drivers/xen/core/evtchn.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/evtchn.c 2008-12-02 09:14:29.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/evtchn.c 2008-12-03 15:54:25.000000000 +0100
+@@ -57,6 +57,23 @@ static DEFINE_SPINLOCK(irq_mapping_updat
+ static int evtchn_to_irq[NR_EVENT_CHANNELS] = {
+ [0 ... NR_EVENT_CHANNELS-1] = -1 };
+
++#if defined(CONFIG_SMP) && defined(CONFIG_X86)
++static struct per_cpu_irqaction {
++ struct irqaction action; /* must be first */
++ struct per_cpu_irqaction *next;
++ cpumask_t cpus;
++} *virq_actions[NR_VIRQS];
++/* IRQ <-> VIRQ mapping. */
++static DECLARE_BITMAP(virq_per_cpu, NR_VIRQS) __read_mostly;
++static DEFINE_PER_CPU(int[NR_VIRQS], virq_to_evtchn) = {[0 ... NR_VIRQS-1] = -1};
++#define BUG_IF_VIRQ_PER_CPU(irq) \
++ BUG_ON(type_from_irq(irq) == IRQT_VIRQ \
++ && test_bit(index_from_irq(irq), virq_per_cpu))
++#else
++#define BUG_IF_VIRQ_PER_CPU(irq) ((void)(irq))
++#define PER_CPU_VIRQ_IRQ
++#endif
++
+ /* IRQ <-> IPI mapping. */
+ #ifndef NR_IPIS
+ #define NR_IPIS 1
+@@ -113,13 +130,6 @@ static inline u32 mk_irq_info(u32 type,
+ * Accessors for packed IRQ information.
+ */
+
+-#ifdef PER_CPU_IPI_IRQ
+-static inline unsigned int evtchn_from_irq(int irq)
+-{
+- return irq_info[irq] & ((1U << _EVTCHN_BITS) - 1);
+-}
+-#endif
+-
+ static inline unsigned int index_from_irq(int irq)
+ {
+ return (irq_info[irq] >> _EVTCHN_BITS) & ((1U << _INDEX_BITS) - 1);
+@@ -130,20 +140,34 @@ static inline unsigned int type_from_irq
+ return irq_info[irq] >> (32 - _IRQT_BITS);
+ }
+
+-#ifndef PER_CPU_IPI_IRQ
+ static inline unsigned int evtchn_from_per_cpu_irq(unsigned int irq, unsigned int cpu)
+ {
+- BUG_ON(type_from_irq(irq) != IRQT_IPI);
+- return per_cpu(ipi_to_evtchn, cpu)[index_from_irq(irq)];
++ switch (type_from_irq(irq)) {
++#ifndef PER_CPU_VIRQ_IRQ
++ case IRQT_VIRQ:
++ return per_cpu(virq_to_evtchn, cpu)[index_from_irq(irq)];
++#endif
++#ifndef PER_CPU_IPI_IRQ
++ case IRQT_IPI:
++ return per_cpu(ipi_to_evtchn, cpu)[index_from_irq(irq)];
++#endif
++ }
++ BUG();
+ }
+
+ static inline unsigned int evtchn_from_irq(unsigned int irq)
+ {
+- if (type_from_irq(irq) != IRQT_IPI)
+- return irq_info[irq] & ((1U << _EVTCHN_BITS) - 1);
+- return evtchn_from_per_cpu_irq(irq, smp_processor_id());
+-}
++ switch (type_from_irq(irq)) {
++#ifndef PER_CPU_VIRQ_IRQ
++ case IRQT_VIRQ:
++#endif
++#ifndef PER_CPU_IPI_IRQ
++ case IRQT_IPI:
+ #endif
++ return evtchn_from_per_cpu_irq(irq, smp_processor_id());
++ }
++ return irq_info[irq] & ((1U << _EVTCHN_BITS) - 1);
++}
+
+ /* IRQ <-> VIRQ mapping. */
+ DEFINE_PER_CPU(int, virq_to_irq[NR_VIRQS]) = {[0 ... NR_VIRQS-1] = -1};
+@@ -463,6 +487,14 @@ static int bind_virq_to_irq(unsigned int
+ evtchn = bind_virq.port;
+
+ evtchn_to_irq[evtchn] = irq;
++#ifndef PER_CPU_VIRQ_IRQ
++ {
++ unsigned int cpu;
++
++ for_each_possible_cpu(cpu)
++ per_cpu(virq_to_evtchn, cpu)[virq] = evtchn;
++ }
++#endif
+ irq_info[irq] = mk_irq_info(IRQT_VIRQ, virq, evtchn);
+
+ per_cpu(virq_to_irq, cpu)[virq] = irq;
+@@ -517,7 +549,9 @@ static void unbind_from_irq(unsigned int
+ unsigned int cpu;
+ int evtchn = evtchn_from_irq(irq);
+
++ BUG_IF_VIRQ_PER_CPU(irq);
+ BUG_IF_IPI(irq);
++
+ spin_lock(&irq_mapping_update_lock);
+
+ if ((--irq_bindcount[irq] == 0) && VALID_EVTCHN(evtchn)) {
+@@ -530,6 +564,11 @@ static void unbind_from_irq(unsigned int
+ case IRQT_VIRQ:
+ per_cpu(virq_to_irq, cpu_from_evtchn(evtchn))
+ [index_from_irq(irq)] = -1;
++#ifndef PER_CPU_VIRQ_IRQ
++ for_each_possible_cpu(cpu)
++ per_cpu(virq_to_evtchn, cpu)
++ [index_from_irq(irq)] = -1;
++#endif
+ break;
+ #if defined(CONFIG_SMP) && defined(PER_CPU_IPI_IRQ)
+ case IRQT_IPI:
+@@ -555,11 +594,13 @@ static void unbind_from_irq(unsigned int
+ spin_unlock(&irq_mapping_update_lock);
+ }
+
+-#if defined(CONFIG_SMP) && !defined(PER_CPU_IPI_IRQ)
+-void unbind_from_per_cpu_irq(unsigned int irq, unsigned int cpu)
++#if defined(CONFIG_SMP) && (!defined(PER_CPU_IPI_IRQ) || !defined(PER_CPU_VIRQ_IRQ))
++void unbind_from_per_cpu_irq(unsigned int irq, unsigned int cpu,
++ struct irqaction *action)
+ {
+ struct evtchn_close close;
+ int evtchn = evtchn_from_per_cpu_irq(irq, cpu);
++ struct irqaction *free_action = NULL;
+
+ spin_lock(&irq_mapping_update_lock);
+
+@@ -570,6 +611,32 @@ void unbind_from_per_cpu_irq(unsigned in
+
+ BUG_ON(irq_bindcount[irq] <= 1);
+ irq_bindcount[irq]--;
++
++#ifndef PER_CPU_VIRQ_IRQ
++ if (type_from_irq(irq) == IRQT_VIRQ) {
++ unsigned int virq = index_from_irq(irq);
++ struct per_cpu_irqaction *cur, *prev = NULL;
++
++ cur = virq_actions[virq];
++ while (cur) {
++ if (cur->action.dev_id == action) {
++ cpu_clear(cpu, cur->cpus);
++ if (cpus_empty(cur->cpus)) {
++ if (prev)
++ prev->next = cur->next;
++ else
++ virq_actions[virq] = cur->next;
++ free_action = action;
++ }
++ } else if (cpu_isset(cpu, cur->cpus))
++ evtchn = 0;
++ cur = (prev = cur)->next;
++ }
++ if (!VALID_EVTCHN(evtchn))
++ goto done;
++ }
++#endif
++
+ cpu_clear(cpu, desc->affinity);
+
+ close.port = evtchn;
+@@ -577,9 +644,16 @@ void unbind_from_per_cpu_irq(unsigned in
+ BUG();
+
+ switch (type_from_irq(irq)) {
++#ifndef PER_CPU_VIRQ_IRQ
++ case IRQT_VIRQ:
++ per_cpu(virq_to_evtchn, cpu)[index_from_irq(irq)] = -1;
++ break;
++#endif
++#ifndef PER_CPU_IPI_IRQ
+ case IRQT_IPI:
+ per_cpu(ipi_to_evtchn, cpu)[index_from_irq(irq)] = -1;
+ break;
++#endif
+ default:
+ BUG();
+ break;
+@@ -591,9 +665,16 @@ void unbind_from_per_cpu_irq(unsigned in
+ evtchn_to_irq[evtchn] = -1;
+ }
+
++#ifndef PER_CPU_VIRQ_IRQ
++done:
++#endif
+ spin_unlock(&irq_mapping_update_lock);
++
++ if (free_action)
++ free_irq(irq, free_action);
+ }
+-#endif /* CONFIG_SMP && !PER_CPU_IPI_IRQ */
++EXPORT_SYMBOL_GPL(unbind_from_per_cpu_irq);
++#endif /* CONFIG_SMP && (!PER_CPU_IPI_IRQ || !PER_CPU_VIRQ_IRQ) */
+
+ int bind_caller_port_to_irqhandler(
+ unsigned int caller_port,
+@@ -675,6 +756,8 @@ int bind_virq_to_irqhandler(
+ {
+ int irq, retval;
+
++ BUG_IF_VIRQ_PER_CPU(virq);
++
+ irq = bind_virq_to_irq(virq, cpu);
+ if (irq < 0)
+ return irq;
+@@ -690,6 +773,108 @@ int bind_virq_to_irqhandler(
+ EXPORT_SYMBOL_GPL(bind_virq_to_irqhandler);
+
+ #ifdef CONFIG_SMP
++#ifndef PER_CPU_VIRQ_IRQ
++int bind_virq_to_irqaction(
++ unsigned int virq,
++ unsigned int cpu,
++ struct irqaction *action)
++{
++ struct evtchn_bind_virq bind_virq;
++ int evtchn, irq, retval = 0;
++ struct per_cpu_irqaction *cur = NULL, *new;
++
++ BUG_ON(!test_bit(virq, virq_per_cpu));
++
++ if (action->dev_id)
++ return -EINVAL;
++
++ new = kzalloc(sizeof(*new), GFP_ATOMIC);
++ if (new) {
++ new->action = *action;
++ new->action.dev_id = action;
++ }
++
++ spin_lock(&irq_mapping_update_lock);
++
++ for (cur = virq_actions[virq]; cur; cur = cur->next)
++ if (cur->action.dev_id == action)
++ break;
++ if (!cur) {
++ if (!new) {
++ spin_unlock(&irq_mapping_update_lock);
++ return -ENOMEM;
++ }
++ new->next = virq_actions[virq];
++ virq_actions[virq] = cur = new;
++ retval = 1;
++ }
++ cpu_set(cpu, cur->cpus);
++ action = &cur->action;
++
++ if ((irq = per_cpu(virq_to_irq, cpu)[virq]) == -1) {
++ unsigned int cpu;
++
++ BUG_ON(!retval);
++
++ if ((irq = find_unbound_irq()) < 0) {
++ if (cur)
++ virq_actions[virq] = cur->next;
++ spin_unlock(&irq_mapping_update_lock);
++ if (cur != new)
++ kfree(new);
++ return irq;
++ }
++
++ /* Extra reference so count will never drop to zero. */
++ irq_bindcount[irq]++;
++
++ for_each_possible_cpu(cpu)
++ per_cpu(virq_to_irq, cpu)[virq] = irq;
++ irq_info[irq] = mk_irq_info(IRQT_VIRQ, virq, 0);
++ irq_desc[irq].handle_irq = handle_percpu_irq;
++ }
++
++ if ((evtchn = per_cpu(virq_to_evtchn, cpu)[virq]) == -1) {
++ bind_virq.virq = virq;
++ bind_virq.vcpu = cpu;
++ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
++ &bind_virq) != 0)
++ BUG();
++ evtchn = bind_virq.port;
++ evtchn_to_irq[evtchn] = irq;
++ per_cpu(virq_to_evtchn, cpu)[virq] = evtchn;
++
++ bind_evtchn_to_cpu(evtchn, cpu);
++ }
++
++ irq_bindcount[irq]++;
++
++ spin_unlock(&irq_mapping_update_lock);
++
++ if (cur != new)
++ kfree(new);
++
++ if (retval == 0) {
++ unsigned long flags;
++
++ local_irq_save(flags);
++ unmask_evtchn(evtchn);
++ local_irq_restore(flags);
++ } else {
++ action->flags |= IRQF_PERCPU;
++ retval = setup_irq(irq, action);
++ if (retval) {
++ unbind_from_per_cpu_irq(irq, cpu, cur->action.dev_id);
++ BUG_ON(retval > 0);
++ irq = retval;
++ }
++ }
++
++ return irq;
++}
++EXPORT_SYMBOL_GPL(bind_virq_to_irqaction);
++#endif
++
+ #ifdef PER_CPU_IPI_IRQ
+ int bind_ipi_to_irqhandler(
+ unsigned int ipi,
+@@ -769,7 +954,7 @@ int __cpuinit bind_ipi_to_irqaction(
+ action->flags |= IRQF_PERCPU;
+ retval = setup_irq(irq, action);
+ if (retval) {
+- unbind_from_per_cpu_irq(irq, cpu);
++ unbind_from_per_cpu_irq(irq, cpu, NULL);
+ BUG_ON(retval > 0);
+ irq = retval;
+ }
+@@ -804,7 +989,9 @@ static void rebind_irq_to_cpu(unsigned i
+ {
+ int evtchn = evtchn_from_irq(irq);
+
++ BUG_IF_VIRQ_PER_CPU(irq);
+ BUG_IF_IPI(irq);
++
+ if (VALID_EVTCHN(evtchn))
+ rebind_evtchn_to_cpu(evtchn, tcpu);
+ }
+@@ -1075,7 +1262,9 @@ void notify_remote_via_irq(int irq)
+ {
+ int evtchn = evtchn_from_irq(irq);
+
++ BUG_ON(type_from_irq(irq) == IRQT_VIRQ);
+ BUG_IF_IPI(irq);
++
+ if (VALID_EVTCHN(evtchn))
+ notify_remote_via_evtchn(evtchn);
+ }
+@@ -1083,6 +1272,7 @@ EXPORT_SYMBOL_GPL(notify_remote_via_irq)
+
+ int irq_to_evtchn_port(int irq)
+ {
++ BUG_IF_VIRQ_PER_CPU(irq);
+ BUG_IF_IPI(irq);
+ return evtchn_from_irq(irq);
+ }
+@@ -1177,6 +1367,20 @@ static void restore_cpu_virqs(unsigned i
+ if ((irq = per_cpu(virq_to_irq, cpu)[virq]) == -1)
+ continue;
+
++#ifndef PER_CPU_VIRQ_IRQ
++ if (test_bit(virq, virq_per_cpu)) {
++ const struct per_cpu_irqaction *cur;
++
++ if(cpu != smp_processor_id())
++ continue;
++ for (cur = virq_actions[virq]; cur; cur = cur->next)
++ if (cpu_isset(cpu, cur->cpus))
++ break;
++ if (!cur)
++ continue;
++ }
++#endif
++
+ BUG_ON(irq_info[irq] != mk_irq_info(IRQT_VIRQ, virq, 0));
+
+ /* Get a new binding from Xen. */
+@@ -1189,7 +1393,19 @@ static void restore_cpu_virqs(unsigned i
+
+ /* Record the new mapping. */
+ evtchn_to_irq[evtchn] = irq;
++#ifndef PER_CPU_VIRQ_IRQ
++ if (test_bit(virq, virq_per_cpu))
++ per_cpu(virq_to_evtchn, cpu)[virq] = evtchn;
++ else {
++ unsigned int cpu;
++
++ irq_info[irq] = mk_irq_info(IRQT_VIRQ, virq, evtchn);
++ for_each_possible_cpu(cpu)
++ per_cpu(virq_to_evtchn, cpu)[virq] = evtchn;
++ }
++#else
+ irq_info[irq] = mk_irq_info(IRQT_VIRQ, virq, evtchn);
++#endif
+ bind_evtchn_to_cpu(evtchn, cpu);
+
+ /* Ready for use. */
+@@ -1242,7 +1458,11 @@ static int evtchn_resume(struct sys_devi
+
+ /* Avoid doing anything in the 'suspend cancelled' case. */
+ status.dom = DOMID_SELF;
++#ifdef PER_CPU_VIRQ_IRQ
+ status.port = evtchn_from_irq(__get_cpu_var(virq_to_irq)[VIRQ_TIMER]);
++#else
++ status.port = __get_cpu_var(virq_to_evtchn)[VIRQ_TIMER];
++#endif
+ if (HYPERVISOR_event_channel_op(EVTCHNOP_status, &status))
+ BUG();
+ if (status.status == EVTCHNSTAT_virq
+@@ -1391,6 +1611,15 @@ void __init xen_init_IRQ(void)
+ unsigned int i;
+ struct physdev_pirq_eoi_mfn eoi_mfn;
+
++#ifndef PER_CPU_VIRQ_IRQ
++ __set_bit(VIRQ_TIMER, virq_per_cpu);
++ __set_bit(VIRQ_DEBUG, virq_per_cpu);
++ __set_bit(VIRQ_XENOPROF, virq_per_cpu);
++#ifdef CONFIG_IA64
++ __set_bit(VIRQ_ITC, virq_per_cpu);
++#endif
++#endif
++
+ init_evtchn_cpu_bindings();
+
+ BUG_ON(!bitmap_empty(pirq_needs_eoi, PAGE_SIZE * 8));
+Index: head-2008-12-01/drivers/xen/core/smpboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/smpboot.c 2008-12-01 12:07:34.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/smpboot.c 2008-12-01 12:08:40.000000000 +0100
+@@ -170,11 +170,11 @@ static int __cpuinit xen_smp_intr_init(u
+
+ fail:
+ if (resched_irq >= 0)
+- unbind_from_per_cpu_irq(resched_irq, cpu);
++ unbind_from_per_cpu_irq(resched_irq, cpu, NULL);
+ if (callfunc_irq >= 0)
+- unbind_from_per_cpu_irq(callfunc_irq, cpu);
++ unbind_from_per_cpu_irq(callfunc_irq, cpu, NULL);
+ if (call1func_irq >= 0)
+- unbind_from_per_cpu_irq(call1func_irq, cpu);
++ unbind_from_per_cpu_irq(call1func_irq, cpu, NULL);
+ xen_spinlock_cleanup(cpu);
+ return rc;
+ }
+@@ -185,9 +185,9 @@ static void __cpuinit xen_smp_intr_exit(
+ if (cpu != 0)
+ local_teardown_timer(cpu);
+
+- unbind_from_per_cpu_irq(resched_irq, cpu);
+- unbind_from_per_cpu_irq(callfunc_irq, cpu);
+- unbind_from_per_cpu_irq(call1func_irq, cpu);
++ unbind_from_per_cpu_irq(resched_irq, cpu, NULL);
++ unbind_from_per_cpu_irq(callfunc_irq, cpu, NULL);
++ unbind_from_per_cpu_irq(call1func_irq, cpu, NULL);
+ xen_spinlock_cleanup(cpu);
+ }
+ #endif
+Index: head-2008-12-01/drivers/xen/core/spinlock.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/spinlock.c 2008-12-01 12:07:34.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/spinlock.c 2008-12-01 12:08:40.000000000 +0100
+@@ -56,7 +56,7 @@ int __cpuinit xen_spinlock_init(unsigned
+ void __cpuinit xen_spinlock_cleanup(unsigned int cpu)
+ {
+ if (spinlock_irq >= 0)
+- unbind_from_per_cpu_irq(spinlock_irq, cpu);
++ unbind_from_per_cpu_irq(spinlock_irq, cpu, NULL);
+ }
+
+ int xen_spin_wait(raw_spinlock_t *lock, unsigned int token)
+Index: head-2008-12-01/drivers/xen/netback/netback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/netback.c 2008-12-01 11:36:55.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/netback.c 2008-12-01 12:08:40.000000000 +0100
+@@ -1543,6 +1543,12 @@ static irqreturn_t netif_be_dbg(int irq,
+
+ return IRQ_HANDLED;
+ }
++
++static struct irqaction netif_be_dbg_action = {
++ .handler = netif_be_dbg,
++ .flags = IRQF_SHARED,
++ .name = "net-be-dbg"
++};
+ #endif
+
+ static int __init netback_init(void)
+@@ -1602,12 +1608,9 @@ static int __init netback_init(void)
+ netif_xenbus_init();
+
+ #ifdef NETBE_DEBUG_INTERRUPT
+- (void)bind_virq_to_irqhandler(VIRQ_DEBUG,
+- 0,
+- netif_be_dbg,
+- IRQF_SHARED,
+- "net-be-dbg",
+- &netif_be_dbg);
++ (void)bind_virq_to_irqaction(VIRQ_DEBUG,
++ 0,
++ &netif_be_dbg_action);
+ #endif
+
+ return 0;
+Index: head-2008-12-01/drivers/xen/xenoprof/xenoprofile.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/xenoprof/xenoprofile.c 2008-12-01 11:37:10.000000000 +0100
++++ head-2008-12-01/drivers/xen/xenoprof/xenoprofile.c 2008-12-01 12:08:40.000000000 +0100
+@@ -212,6 +212,11 @@ static irqreturn_t xenoprof_ovf_interrup
+ return IRQ_HANDLED;
+ }
+
++static struct irqaction ovf_action = {
++ .handler = xenoprof_ovf_interrupt,
++ .flags = IRQF_DISABLED,
++ .name = "xenoprof"
++};
+
+ static void unbind_virq(void)
+ {
+@@ -219,7 +224,7 @@ static void unbind_virq(void)
+
+ for_each_online_cpu(i) {
+ if (ovf_irq[i] >= 0) {
+- unbind_from_irqhandler(ovf_irq[i], NULL);
++ unbind_from_per_cpu_irq(ovf_irq[i], i, &ovf_action);
+ ovf_irq[i] = -1;
+ }
+ }
+@@ -232,12 +237,7 @@ static int bind_virq(void)
+ int result;
+
+ for_each_online_cpu(i) {
+- result = bind_virq_to_irqhandler(VIRQ_XENOPROF,
+- i,
+- xenoprof_ovf_interrupt,
+- IRQF_DISABLED|IRQF_NOBALANCING,
+- "xenoprof",
+- NULL);
++ result = bind_virq_to_irqaction(VIRQ_XENOPROF, i, &ovf_action);
+
+ if (result < 0) {
+ unbind_virq();
+Index: head-2008-12-01/include/xen/evtchn.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/evtchn.h 2008-12-01 12:07:34.000000000 +0100
++++ head-2008-12-01/include/xen/evtchn.h 2008-12-01 12:08:40.000000000 +0100
+@@ -78,6 +78,17 @@ int bind_virq_to_irqhandler(
+ unsigned long irqflags,
+ const char *devname,
+ void *dev_id);
++#if defined(CONFIG_SMP) && defined(CONFIG_XEN) && defined(CONFIG_X86)
++int bind_virq_to_irqaction(
++ unsigned int virq,
++ unsigned int cpu,
++ struct irqaction *action);
++#else
++#define bind_virq_to_irqaction(virq, cpu, action) \
++ bind_virq_to_irqhandler(virq, cpu, (action)->handler, \
++ (action)->flags | IRQF_NOBALANCING, \
++ (action)->name, action)
++#endif
+ #if defined(CONFIG_SMP) && !defined(MODULE)
+ #ifndef CONFIG_X86
+ int bind_ipi_to_irqhandler(
+@@ -102,9 +113,13 @@ int bind_ipi_to_irqaction(
+ */
+ void unbind_from_irqhandler(unsigned int irq, void *dev_id);
+
+-#if defined(CONFIG_SMP) && !defined(MODULE) && defined(CONFIG_X86)
++#if defined(CONFIG_SMP) && defined(CONFIG_XEN) && defined(CONFIG_X86)
+ /* Specialized unbind function for per-CPU IRQs. */
+-void unbind_from_per_cpu_irq(unsigned int irq, unsigned int cpu);
++void unbind_from_per_cpu_irq(unsigned int irq, unsigned int cpu,
++ struct irqaction *);
++#else
++#define unbind_from_per_cpu_irq(irq, cpu, action) \
++ unbind_from_irqhandler(irq, action)
+ #endif
+
+ #ifndef CONFIG_XEN
--- /dev/null
+From: jbeulich@novell.com
+Subject: allow number of guest devices to be configurable
+Patch-mainline: obsolete
+
+... and derive NR_DYNIRQS from this (rather than having a hard-coded
+value).
+Similarly, allow the number of simultaneous transmits in netback to be
+configurable.
+
+---
+ drivers/xen/Kconfig | 19 +++++++++++++++++++
+ drivers/xen/netback/netback.c | 3 ++-
+ include/asm-x86/mach-xen/asm/irq_vectors.h | 2 +-
+ 3 files changed, 22 insertions(+), 2 deletions(-)
+
+--- a/drivers/xen/Kconfig
++++ b/drivers/xen/Kconfig
+@@ -74,6 +74,15 @@ config XEN_NETDEV_BACKEND
+ network devices to other guests via a high-performance shared-memory
+ interface.
+
++config XEN_NETDEV_TX_SHIFT
++ int "Maximum simultaneous transmit requests (as a power of 2)"
++ depends on XEN_NETDEV_BACKEND
++ range 5 16
++ default 8
++ help
++ The maximum number transmits the driver can hold pending, expressed
++ as the exponent of a power of 2.
++
+ config XEN_NETDEV_PIPELINED_TRANSMITTER
+ bool "Pipelined transmitter (DANGEROUS)"
+ depends on XEN_NETDEV_BACKEND
+@@ -255,6 +264,16 @@ config XEN_SYSFS
+ help
+ Xen hypervisor attributes will show up under /sys/hypervisor/.
+
++config XEN_NR_GUEST_DEVICES
++ int "Number of guest devices"
++ range 0 4032 if 64BIT
++ range 0 960
++ default 256 if XEN_BACKEND
++ default 16
++ help
++ Specify the total number of virtual devices (i.e. both frontend
++ and backend) that you want the kernel to be able to service.
++
+ choice
+ prompt "Xen version compatibility"
+ default XEN_COMPAT_030002_AND_LATER
+--- a/drivers/xen/netback/netback.c
++++ b/drivers/xen/netback/netback.c
+@@ -74,7 +74,7 @@ static DECLARE_TASKLET(net_rx_tasklet, n
+ static struct timer_list net_timer;
+ static struct timer_list netbk_tx_pending_timer;
+
+-#define MAX_PENDING_REQS 256
++#define MAX_PENDING_REQS (1U << CONFIG_XEN_NETDEV_TX_SHIFT)
+
+ static struct sk_buff_head rx_queue;
+
+@@ -1196,6 +1196,7 @@ static void net_tx_action(unsigned long
+ net_tx_action_dealloc();
+
+ mop = tx_map_ops;
++ BUILD_BUG_ON(MAX_SKB_FRAGS >= MAX_PENDING_REQS);
+ while (((NR_PENDING_REQS + MAX_SKB_FRAGS) < MAX_PENDING_REQS) &&
+ !list_empty(&net_schedule_list)) {
+ /* Get a netif from the list with work to do. */
+--- a/include/asm-x86/mach-xen/asm/irq_vectors.h
++++ b/include/asm-x86/mach-xen/asm/irq_vectors.h
+@@ -44,7 +44,7 @@
+ #endif
+
+ #define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS)
+-#define NR_DYNIRQS 256
++#define NR_DYNIRQS (64 + CONFIG_XEN_NR_GUEST_DEVICES)
+
+ #define NR_IRQS (NR_PIRQS + NR_DYNIRQS)
+ #define NR_IRQ_VECTORS NR_IRQS
--- /dev/null
+From: jbeulich@novell.com
+Subject: netback: reduce overhead of IRQ recording
+Patch-mainline: obsolete
+
+Since both NR_PIRQS and NR_DYNIRQS are no longer hardcoded, the
+(memory) overhead of tracking which ones to send notifications to can
+be pretty unbounded. Also, store the dynirq rather than the raw irq
+to push up the limit where the type of notify_list needs to become
+'int' rather than 'u16'.
+
+Index: head-2008-12-01/drivers/xen/netback/interface.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/interface.c 2007-06-12 13:13:45.000000000 +0200
++++ head-2008-12-01/drivers/xen/netback/interface.c 2008-12-01 12:10:26.000000000 +0100
+@@ -273,6 +273,7 @@ int netif_map(netif_t *netif, unsigned l
+ netif->dev->name, netif);
+ if (err < 0)
+ goto err_hypervisor;
++ BUG_ON(err < DYNIRQ_BASE || err >= DYNIRQ_BASE + NR_DYNIRQS);
+ netif->irq = err;
+ disable_irq(netif->irq);
+
+Index: head-2008-12-01/drivers/xen/netback/netback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/netback.c 2008-12-01 12:10:23.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/netback.c 2008-12-01 12:10:26.000000000 +0100
+@@ -564,8 +564,12 @@ static void net_rx_action(unsigned long
+ static mmu_update_t rx_mmu[NET_RX_RING_SIZE];
+ static gnttab_transfer_t grant_trans_op[NET_RX_RING_SIZE];
+ static gnttab_copy_t grant_copy_op[NET_RX_RING_SIZE];
+- static unsigned char rx_notify[NR_IRQS];
++ static DECLARE_BITMAP(rx_notify, NR_DYNIRQS);
++#if NR_DYNIRQS <= 0x10000
+ static u16 notify_list[NET_RX_RING_SIZE];
++#else
++ static int notify_list[NET_RX_RING_SIZE];
++#endif
+ static struct netbk_rx_meta meta[NET_RX_RING_SIZE];
+
+ struct netrx_pending_operations npo = {
+@@ -714,11 +718,9 @@ static void net_rx_action(unsigned long
+ nr_frags);
+
+ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netif->rx, ret);
+- irq = netif->irq;
+- if (ret && !rx_notify[irq]) {
+- rx_notify[irq] = 1;
++ irq = netif->irq - DYNIRQ_BASE;
++ if (ret && !__test_and_set_bit(irq, rx_notify))
+ notify_list[notify_nr++] = irq;
+- }
+
+ if (netif_queue_stopped(netif->dev) &&
+ netif_schedulable(netif) &&
+@@ -732,8 +734,8 @@ static void net_rx_action(unsigned long
+
+ while (notify_nr != 0) {
+ irq = notify_list[--notify_nr];
+- rx_notify[irq] = 0;
+- notify_remote_via_irq(irq);
++ __clear_bit(irq, rx_notify);
++ notify_remote_via_irq(irq + DYNIRQ_BASE);
+ }
+
+ /* More work to do? */
--- /dev/null
+From: jbeulich@novell.com
+Subject: netback: use multicall for send multiple notifications
+Patch-mainline: obsolete
+
+This also does a small fairness improvement since now notifications
+get sent in the order requests came in rather than in the inverse one.
+
+Index: head-2008-12-01/drivers/xen/core/evtchn.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/evtchn.c 2008-12-03 15:54:25.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/evtchn.c 2008-12-03 15:54:45.000000000 +0100
+@@ -1270,6 +1270,21 @@ void notify_remote_via_irq(int irq)
+ }
+ EXPORT_SYMBOL_GPL(notify_remote_via_irq);
+
++int multi_notify_remote_via_irq(multicall_entry_t *mcl, int irq)
++{
++ int evtchn = evtchn_from_irq(irq);
++
++ BUG_ON(type_from_irq(irq) == IRQT_VIRQ);
++ BUG_IF_IPI(irq);
++
++ if (!VALID_EVTCHN(evtchn))
++ return -EINVAL;
++
++ multi_notify_remote_via_evtchn(mcl, evtchn);
++ return 0;
++}
++EXPORT_SYMBOL_GPL(multi_notify_remote_via_irq);
++
+ int irq_to_evtchn_port(int irq)
+ {
+ BUG_IF_VIRQ_PER_CPU(irq);
+Index: head-2008-12-01/drivers/xen/netback/netback.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/netback/netback.c 2008-12-01 12:10:26.000000000 +0100
++++ head-2008-12-01/drivers/xen/netback/netback.c 2008-12-01 12:10:27.000000000 +0100
+@@ -732,10 +732,20 @@ static void net_rx_action(unsigned long
+ npo.meta_cons += nr_frags + 1;
+ }
+
+- while (notify_nr != 0) {
+- irq = notify_list[--notify_nr];
++ if (notify_nr == 1) {
++ irq = *notify_list;
+ __clear_bit(irq, rx_notify);
+ notify_remote_via_irq(irq + DYNIRQ_BASE);
++ } else {
++ for (count = ret = 0; ret < notify_nr; ++ret) {
++ irq = notify_list[ret];
++ __clear_bit(irq, rx_notify);
++ if (!multi_notify_remote_via_irq(rx_mcl + count,
++ irq + DYNIRQ_BASE))
++ ++count;
++ }
++ if (HYPERVISOR_multicall(rx_mcl, count))
++ BUG();
+ }
+
+ /* More work to do? */
+Index: head-2008-12-01/include/xen/evtchn.h
+===================================================================
+--- head-2008-12-01.orig/include/xen/evtchn.h 2008-12-01 12:08:40.000000000 +0100
++++ head-2008-12-01/include/xen/evtchn.h 2008-12-01 12:10:27.000000000 +0100
+@@ -179,6 +179,18 @@ static inline void notify_remote_via_evt
+ VOID(HYPERVISOR_event_channel_op(EVTCHNOP_send, &send));
+ }
+
++static inline void
++multi_notify_remote_via_evtchn(multicall_entry_t *mcl, int port)
++{
++ struct evtchn_send *send = (void *)(mcl->args + 2);
++
++ BUILD_BUG_ON(sizeof(*send) > sizeof(mcl->args) - 2 * sizeof(*mcl->args));
++ send->port = port;
++ mcl->op = __HYPERVISOR_event_channel_op;
++ mcl->args[0] = EVTCHNOP_send;
++ mcl->args[1] = (unsigned long)send;
++}
++
+ /* Clear an irq's pending state, in preparation for polling on it. */
+ void xen_clear_irq_pending(int irq);
+
+@@ -197,6 +209,7 @@ void xen_poll_irq(int irq);
+ * by bind_*_to_irqhandler().
+ */
+ void notify_remote_via_irq(int irq);
++int multi_notify_remote_via_irq(multicall_entry_t *, int irq);
+ int irq_to_evtchn_port(int irq);
+
+ #define PIRQ_SET_MAPPING 0x0
--- /dev/null
+From: jbeulich@novell.com
+Subject: Don't automatically reboot Dom0 on panic (match native)
+Patch-mainline: obsolete
+
+$subject says it all.
+
+Index: head-2008-11-17/arch/x86/kernel/setup-xen.c
+===================================================================
+--- head-2008-11-17.orig/arch/x86/kernel/setup-xen.c 2008-11-17 13:57:02.000000000 +0100
++++ head-2008-11-17/arch/x86/kernel/setup-xen.c 2008-11-17 13:58:02.000000000 +0100
+@@ -701,15 +701,16 @@ void __init setup_arch(char **cmdline_p)
+ unsigned long p2m_pages;
+ struct physdev_set_iopl set_iopl;
+
++ if (!is_initial_xendomain()) {
+ #ifdef CONFIG_X86_32
+- /* Force a quick death if the kernel panics (not domain 0). */
+- extern int panic_timeout;
+- if (!panic_timeout && !is_initial_xendomain())
+- panic_timeout = 1;
++ /* Force a quick death if the kernel panics (not domain 0). */
++ extern int panic_timeout;
++ if (!panic_timeout)
++ panic_timeout = 1;
+ #endif
+-
+- /* Register a call for panic conditions. */
+- atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
++ /* Register a call for panic conditions. */
++ atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
++ }
+
+ WARN_ON(HYPERVISOR_vm_assist(VMASST_CMD_enable,
+ VMASST_TYPE_writable_pagetables));
--- /dev/null
+Subject: Add fallback when XENMEM_exchange fails to replace contiguous region
+From: jbeulich@novell.com
+Patch-mainline: obsolete
+References: 181869
+
+This avoids losing precious special memory in places where any memory can be
+used.
+
+Index: head-2008-11-20/arch/x86/mm/hypervisor.c
+===================================================================
+--- head-2008-11-20.orig/arch/x86/mm/hypervisor.c 2008-11-21 15:51:34.000000000 +0100
++++ head-2008-11-20/arch/x86/mm/hypervisor.c 2008-11-17 12:12:39.000000000 +0100
+@@ -42,6 +42,7 @@
+ #include <xen/interface/memory.h>
+ #include <linux/module.h>
+ #include <linux/percpu.h>
++#include <linux/highmem.h>
+ #include <asm/tlbflush.h>
+ #include <linux/highmem.h>
+
+@@ -668,6 +669,83 @@ void xen_destroy_contiguous_region(unsig
+ BUG();
+
+ balloon_unlock(flags);
++
++ if (unlikely(!success)) {
++ /* Try hard to get the special memory back to Xen. */
++ exchange.in.extent_order = 0;
++ set_xen_guest_handle(exchange.in.extent_start, &in_frame);
++
++ for (i = 0; i < (1U<<order); i++) {
++ struct page *page = alloc_page(__GFP_HIGHMEM|__GFP_COLD);
++ unsigned long pfn;
++ mmu_update_t mmu;
++ unsigned int j = 0;
++
++ if (!page) {
++ printk(KERN_WARNING "Xen and kernel out of memory "
++ "while trying to release an order %u "
++ "contiguous region\n", order);
++ break;
++ }
++ pfn = page_to_pfn(page);
++
++ balloon_lock(flags);
++
++ if (!PageHighMem(page)) {
++ void *v = __va(pfn << PAGE_SHIFT);
++
++ scrub_pages(v, 1);
++ MULTI_update_va_mapping(cr_mcl + j, (unsigned long)v,
++ __pte_ma(0), UVMF_INVLPG|UVMF_ALL);
++ ++j;
++ }
++#ifdef CONFIG_XEN_SCRUB_PAGES
++ else {
++ scrub_pages(kmap(page), 1);
++ kunmap(page);
++ kmap_flush_unused();
++ }
++#endif
++
++ frame = pfn_to_mfn(pfn);
++ set_phys_to_machine(pfn, INVALID_P2M_ENTRY);
++
++ MULTI_update_va_mapping(cr_mcl + j, vstart,
++ pfn_pte_ma(frame, PAGE_KERNEL),
++ UVMF_INVLPG|UVMF_ALL);
++ ++j;
++
++ pfn = __pa(vstart) >> PAGE_SHIFT;
++ set_phys_to_machine(pfn, frame);
++ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
++ mmu.ptr = ((uint64_t)frame << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE;
++ mmu.val = pfn;
++ cr_mcl[j].op = __HYPERVISOR_mmu_update;
++ cr_mcl[j].args[0] = (unsigned long)&mmu;
++ cr_mcl[j].args[1] = 1;
++ cr_mcl[j].args[2] = 0;
++ cr_mcl[j].args[3] = DOMID_SELF;
++ ++j;
++ }
++
++ cr_mcl[j].op = __HYPERVISOR_memory_op;
++ cr_mcl[j].args[0] = XENMEM_decrease_reservation;
++ cr_mcl[j].args[1] = (unsigned long)&exchange.in;
++
++ if (HYPERVISOR_multicall(cr_mcl, j + 1))
++ BUG();
++ BUG_ON(cr_mcl[j].result != 1);
++ while (j--)
++ BUG_ON(cr_mcl[j].result != 0);
++
++ balloon_unlock(flags);
++
++ free_empty_pages(&page, 1);
++
++ in_frame++;
++ vstart += PAGE_SIZE;
++ }
++ }
+ }
+ EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region);
+
+Index: head-2008-11-20/drivers/xen/balloon/balloon.c
+===================================================================
+--- head-2008-11-20.orig/drivers/xen/balloon/balloon.c 2008-11-21 15:56:56.000000000 +0100
++++ head-2008-11-20/drivers/xen/balloon/balloon.c 2008-11-21 16:00:18.000000000 +0100
+@@ -687,7 +687,7 @@ struct page **alloc_empty_pages_and_page
+ goto out;
+ }
+
+-void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages)
++static void _free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages, int free_vec)
+ {
+ unsigned long flags;
+ int i;
+@@ -702,11 +702,24 @@ void free_empty_pages_and_pagevec(struct
+ }
+ balloon_unlock(flags);
+
+- kfree(pagevec);
++ if (free_vec)
++ kfree(pagevec);
++ else
++ totalram_pages = bs.current_pages -= nr_pages;
+
+ schedule_work(&balloon_worker);
+ }
+
++void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages)
++{
++ _free_empty_pages_and_pagevec(pagevec, nr_pages, 1);
++}
++
++void free_empty_pages(struct page **pagevec, int nr_pages)
++{
++ _free_empty_pages_and_pagevec(pagevec, nr_pages, 0);
++}
++
+ void balloon_release_driver_page(struct page *page)
+ {
+ unsigned long flags;
+Index: head-2008-11-20/include/xen/balloon.h
+===================================================================
+--- head-2008-11-20.orig/include/xen/balloon.h 2008-11-21 15:51:34.000000000 +0100
++++ head-2008-11-20/include/xen/balloon.h 2008-11-21 09:39:34.000000000 +0100
+@@ -47,6 +47,10 @@ void balloon_update_driver_allowance(lon
+ struct page **alloc_empty_pages_and_pagevec(int nr_pages);
+ void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages);
+
++/* Free an empty page range (not allocated through
++ alloc_empty_pages_and_pagevec), adding to the balloon. */
++void free_empty_pages(struct page **pagevec, int nr_pages);
++
+ void balloon_release_driver_page(struct page *page);
+
+ /*
--- /dev/null
+From: jbeulich@novell.com
+Subject: make i386 and x86 NMI code consistent, disable all APIC-related stuff
+Patch-mainline: obsolete
+References: 191115
+
+---
+ arch/x86/kernel/Makefile | 1 -
+ arch/x86/kernel/cpu/Makefile | 2 +-
+ arch/x86/kernel/nmi.c | 13 ++++++++++---
+ arch/x86/kernel/traps_32-xen.c | 2 ++
+ arch/x86/kernel/traps_64-xen.c | 6 +++++-
+ arch/x86/mach-xen/setup.c | 4 ----
+ include/asm-x86/irq.h | 2 +-
+ include/asm-x86/nmi.h | 12 ++++++++----
+ kernel/sysctl.c | 2 ++
+ 9 files changed, 29 insertions(+), 15 deletions(-)
+
+--- a/arch/x86/kernel/cpu/Makefile
++++ b/arch/x86/kernel/cpu/Makefile
+@@ -24,3 +24,4 @@ obj-$(CONFIG_CPU_FREQ) += cpufreq/
+
+ obj-$(CONFIG_X86_LOCAL_APIC) += perfctr-watchdog.o
++disabled-obj-$(CONFIG_XEN) := perfctr-watchdog.o
+
+--- a/arch/x86/kernel/Makefile
++++ b/arch/x86/kernel/Makefile
+@@ -120,7 +120,6 @@ ifeq ($(CONFIG_X86_64),y)
+
+ obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
+
+- obj-$(CONFIG_XEN) += nmi.o
+ time_64-$(CONFIG_XEN) += time_32.o
+ endif
+
+--- a/arch/x86/kernel/nmi.c
++++ b/arch/x86/kernel/nmi.c
+@@ -27,7 +27,7 @@
+ #include <linux/kdebug.h>
+ #include <linux/smp.h>
+
+-#ifndef CONFIG_XEN
++#ifdef ARCH_HAS_NMI_WATCHDOG
+ #include <asm/i8259.h>
+ #endif
+ #include <asm/io_apic.h>
+@@ -41,6 +41,9 @@
+ #include <mach_traps.h>
+
+ int unknown_nmi_panic;
++
++#ifdef ARCH_HAS_NMI_WATCHDOG
++
+ int nmi_watchdog_enabled;
+
+ static cpumask_t backtrace_mask = CPU_MASK_NONE;
+@@ -181,10 +184,8 @@ int __init check_nmi_watchdog(void)
+ kfree(prev_nmi_count);
+ return 0;
+ error:
+-#ifndef CONFIG_XEN
+ if (nmi_watchdog == NMI_IO_APIC && !timer_through_8259)
+ disable_8259A_irq(0);
+-#endif
+ #ifdef CONFIG_X86_32
+ timer_ack = 0;
+ #endif
+@@ -460,6 +461,8 @@ nmi_watchdog_tick(struct pt_regs *regs,
+ return rc;
+ }
+
++#endif /* ARCH_HAS_NMI_WATCHDOG */
++
+ #ifdef CONFIG_SYSCTL
+
+ static int __init setup_unknown_nmi_panic(char *str)
+@@ -479,6 +482,7 @@ static int unknown_nmi_panic_callback(st
+ return 0;
+ }
+
++#ifdef ARCH_HAS_NMI_WATCHDOG
+ /*
+ * proc handler for /proc/sys/kernel/nmi
+ */
+@@ -511,6 +515,7 @@ int proc_nmi_enabled(struct ctl_table *t
+ }
+ return 0;
+ }
++#endif
+
+ #endif /* CONFIG_SYSCTL */
+
+@@ -523,6 +528,7 @@ int do_nmi_callback(struct pt_regs *regs
+ return 0;
+ }
+
++#ifdef ARCH_HAS_NMI_WATCHDOG
+ void __trigger_all_cpu_backtrace(void)
+ {
+ int i;
+@@ -535,3 +541,4 @@ void __trigger_all_cpu_backtrace(void)
+ mdelay(1);
+ }
+ }
++#endif
+--- a/arch/x86/kernel/traps_32-xen.c
++++ b/arch/x86/kernel/traps_32-xen.c
+@@ -823,12 +823,14 @@ static notrace __kprobes void default_do
+ == NOTIFY_STOP)
+ return;
+ #ifdef CONFIG_X86_LOCAL_APIC
++#ifdef ARCH_HAS_NMI_WATCHDOG
+ /*
+ * Ok, so this is none of the documented NMI sources,
+ * so it must be the NMI watchdog.
+ */
+ if (nmi_watchdog_tick(regs, reason))
+ return;
++#endif
+ if (!do_nmi_callback(regs, cpu))
+ unknown_nmi_error(reason, regs);
+ #else
+--- a/arch/x86/kernel/traps_64-xen.c
++++ b/arch/x86/kernel/traps_64-xen.c
+@@ -636,7 +636,7 @@ void die(const char *str, struct pt_regs
+ oops_end(flags, regs, SIGSEGV);
+ }
+
+-#if defined(CONFIG_X86_LOCAL_APIC) || defined(CONFIG_SYSCTL)
++#ifdef CONFIG_SYSCTL
+ notrace __kprobes void
+ die_nmi(char *str, struct pt_regs *regs, int do_panic)
+ {
+@@ -882,6 +882,7 @@ asmlinkage notrace __kprobes void defaul
+ == NOTIFY_STOP)
+ return;
+ #ifdef CONFIG_X86_LOCAL_APIC
++#ifdef ARCH_HAS_NMI_WATCHDOG
+ /*
+ * Ok, so this is none of the documented NMI sources,
+ * so it must be the NMI watchdog.
+@@ -891,6 +892,9 @@ asmlinkage notrace __kprobes void defaul
+ #endif
+ if (!do_nmi_callback(regs, cpu))
+ unknown_nmi_error(reason, regs);
++#else
++ unknown_nmi_error(reason, regs);
++#endif
+
+ return;
+ }
+--- a/arch/x86/mach-xen/setup.c
++++ b/arch/x86/mach-xen/setup.c
+@@ -108,12 +108,10 @@ void __init machine_specific_arch_setup(
+ .address = CALLBACK_ADDR(system_call)
+ };
+ #endif
+-#if defined(CONFIG_X86_LOCAL_APIC) || defined(CONFIG_X86_32)
+ static struct callback_register __initdata nmi_cb = {
+ .type = CALLBACKTYPE_nmi,
+ .address = CALLBACK_ADDR(nmi)
+ };
+-#endif
+
+ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &event);
+ if (ret == 0)
+@@ -137,7 +135,6 @@ void __init machine_specific_arch_setup(
+ #endif
+ BUG_ON(ret);
+
+-#if defined(CONFIG_X86_LOCAL_APIC) || defined(CONFIG_X86_32)
+ ret = HYPERVISOR_callback_op(CALLBACKOP_register, &nmi_cb);
+ #if CONFIG_XEN_COMPAT <= 0x030002
+ if (ret == -ENOSYS) {
+@@ -148,7 +145,6 @@ void __init machine_specific_arch_setup(
+ HYPERVISOR_nmi_op(XENNMI_register_callback, &cb);
+ }
+ #endif
+-#endif
+
+ #ifdef CONFIG_X86_32
+ /* Do an early initialization of the fixmap area */
+--- a/include/asm-x86/irq.h
++++ b/include/asm-x86/irq.h
+@@ -15,7 +15,7 @@ static inline int irq_canonicalize(int i
+ return ((irq == 2) ? 9 : irq);
+ }
+
+-#ifdef CONFIG_X86_LOCAL_APIC
++#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
+ # define ARCH_HAS_NMI_WATCHDOG
+ #endif
+
+--- a/include/asm-x86/nmi.h
++++ b/include/asm-x86/nmi.h
+@@ -5,8 +5,6 @@
+ #include <asm/irq.h>
+ #include <asm/io.h>
+
+-#ifdef ARCH_HAS_NMI_WATCHDOG
+-
+ /**
+ * do_nmi_callback
+ *
+@@ -20,6 +18,11 @@ extern void default_do_nmi(struct pt_reg
+ #endif
+
+ extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
++
++extern int unknown_nmi_panic;
++
++#ifdef ARCH_HAS_NMI_WATCHDOG
++
+ extern int check_nmi_watchdog(void);
+ extern int nmi_watchdog_enabled;
+ extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
+@@ -46,7 +49,6 @@ struct ctl_table;
+ struct file;
+ extern int proc_nmi_enabled(struct ctl_table *, int , struct file *,
+ void __user *, size_t *, loff_t *);
+-extern int unknown_nmi_panic;
+
+ void __trigger_all_cpu_backtrace(void);
+ #define trigger_all_cpu_backtrace() __trigger_all_cpu_backtrace()
+@@ -69,7 +71,6 @@ static inline int nmi_watchdog_active(vo
+ */
+ return nmi_watchdog & 0x3;
+ }
+-#endif
+
+ void lapic_watchdog_stop(void);
+ int lapic_watchdog_init(unsigned nmi_hz);
+@@ -78,6 +79,9 @@ unsigned lapic_adjust_nmi_hz(unsigned hz
+ int lapic_watchdog_ok(void);
+ void disable_lapic_nmi_watchdog(void);
+ void enable_lapic_nmi_watchdog(void);
++
++#endif
++
+ void stop_nmi(void);
+ void restart_nmi(void);
+
+--- a/kernel/sysctl.c
++++ b/kernel/sysctl.c
+@@ -673,6 +673,7 @@ static struct ctl_table kern_table[] = {
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
++#ifdef ARCH_HAS_NMI_WATCHDOG
+ {
+ .procname = "nmi_watchdog",
+ .data = &nmi_watchdog_enabled,
+@@ -681,6 +682,7 @@ static struct ctl_table kern_table[] = {
+ .proc_handler = &proc_nmi_enabled,
+ },
+ #endif
++#endif
+ #if defined(CONFIG_X86)
+ {
+ .ctl_name = KERN_PANIC_ON_NMI,
--- /dev/null
+From: jbeulich@novell.com
+Subject: Disallow all accesses to the local APIC page
+Patch-mainline: obsolete
+References: 191115
+
+Index: head-2008-10-21/arch/x86/kernel/Makefile
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/Makefile 2008-10-21 13:44:06.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/Makefile 2008-10-21 13:44:08.000000000 +0200
+@@ -119,9 +119,11 @@ ifeq ($(CONFIG_X86_64),y)
+
+ obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
+
++ apic_64-$(CONFIG_XEN) += apic_32.o
+ time_64-$(CONFIG_XEN) += time_32.o
+ endif
+
+-disabled-obj-$(CONFIG_XEN) := bios_uv.o early-quirks.o hpet.o i8253.o \
+- i8259.o irqinit_$(BITS).o pci-swiotlb_64.o reboot.o smpboot.o \
+- tlb_$(BITS).o tsc.o tsc_sync.o vsmp_64.o
++disabled-obj-$(CONFIG_XEN) := bios_uv.o early-quirks.o genapic_flat_64.o \
++ genx2apic_%.o hpet.o i8253.o i8259.o irqinit_$(BITS).o \
++ pci-swiotlb_64.o reboot.o smpboot.o tlb_$(BITS).o tlb_uv.o tsc.o \
++ tsc_sync.o vsmp_64.o
+Index: head-2008-10-21/arch/x86/kernel/acpi/boot.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/acpi/boot.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/acpi/boot.c 2008-10-21 13:44:08.000000000 +0200
+@@ -89,7 +89,7 @@ int acpi_sci_override_gsi __initdata;
+ int acpi_skip_timer_override __initdata;
+ int acpi_use_timer_override __initdata;
+
+-#ifdef CONFIG_X86_LOCAL_APIC
++#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
+ static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
+ #endif
+
+@@ -237,12 +237,14 @@ static int __init acpi_parse_madt(struct
+ return -ENODEV;
+ }
+
++#ifndef CONFIG_XEN
+ if (madt->address) {
+ acpi_lapic_addr = (u64) madt->address;
+
+ printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
+ madt->address);
+ }
++#endif
+
+ acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
+
+@@ -317,6 +319,7 @@ static int __init
+ acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
+ const unsigned long end)
+ {
++#ifndef CONFIG_XEN
+ struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
+
+ lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
+@@ -325,6 +328,7 @@ acpi_parse_lapic_addr_ovr(struct acpi_su
+ return -EINVAL;
+
+ acpi_lapic_addr = lapic_addr_ovr->address;
++#endif
+
+ return 0;
+ }
+@@ -904,10 +908,12 @@ static int mp_find_ioapic(int gsi)
+ static u8 __init uniq_ioapic_id(u8 id)
+ {
+ #ifdef CONFIG_X86_32
++#ifndef CONFIG_XEN
+ if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
+ !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+ return io_apic_get_unique_id(nr_ioapics, id);
+ else
++#endif
+ return id;
+ #else
+ int i;
+@@ -1139,7 +1145,7 @@ int mp_register_gsi(u32 gsi, int trigger
+
+ ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
+
+-#ifdef CONFIG_X86_32
++#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+ if (ioapic_renumber_irq)
+ gsi = ioapic_renumber_irq(ioapic, gsi);
+ #endif
+Index: head-2008-10-21/arch/x86/kernel/apic_32-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/apic_32-xen.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/apic_32-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -1,60 +1,11 @@
+ /*
+- * Local APIC handling, local APIC timers
+- *
+- * (c) 1999, 2000 Ingo Molnar <mingo@redhat.com>
+- *
+- * Fixes
+- * Maciej W. Rozycki : Bits for genuine 82489DX APICs;
+- * thanks to Eric Gilmore
+- * and Rolf G. Tews
+- * for testing these extensively.
+- * Maciej W. Rozycki : Various updates and fixes.
+- * Mikael Pettersson : Power Management for UP-APIC.
+- * Pavel Machek and
+- * Mikael Pettersson : PM converted to driver model.
++ * Local APIC handling stubs
+ */
+
+ #include <linux/init.h>
+-
+-#include <linux/mm.h>
+-#include <linux/delay.h>
+-#include <linux/bootmem.h>
+ #include <linux/interrupt.h>
+-#include <linux/mc146818rtc.h>
+-#include <linux/kernel_stat.h>
+-#include <linux/sysdev.h>
+-#include <linux/cpu.h>
+-#include <linux/clockchips.h>
+-#include <linux/acpi_pmtmr.h>
+-#include <linux/module.h>
+
+-#include <asm/atomic.h>
+ #include <asm/smp.h>
+-#include <asm/mtrr.h>
+-#include <asm/mpspec.h>
+-#include <asm/desc.h>
+-#include <asm/arch_hooks.h>
+-#include <asm/hpet.h>
+-#include <asm/i8253.h>
+-#include <asm/nmi.h>
+-
+-#include <mach_apic.h>
+-#include <mach_apicdef.h>
+-#include <mach_ipi.h>
+-
+-#include "io_ports.h"
+-
+-#ifndef CONFIG_XEN
+-/*
+- * cpu_mask that denotes the CPUs that needs timer interrupt coming in as
+- * IPIs in place of local APIC timers
+- */
+-static cpumask_t timer_bcast_ipi;
+-#endif
+-
+-/*
+- * Knob to control our willingness to enable the local APIC.
+- */
+
+ /*
+ * Debug level, exported for io_apic.c
+@@ -64,21 +15,16 @@ unsigned int apic_verbosity;
+ /* Have we found an MP table */
+ int smp_found_config;
+
+-#ifndef CONFIG_XEN
+-static int modern_apic(void)
++static int __init apic_set_verbosity(char *str)
+ {
+- /* AMD systems use old APIC versions, so check the CPU */
+- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
+- boot_cpu_data.x86 >= 0xf)
+- return 1;
+- return lapic_get_version() >= 0x14;
++ if (strcmp("debug", str) == 0)
++ apic_verbosity = APIC_DEBUG;
++ else if (strcmp("verbose", str) == 0)
++ apic_verbosity = APIC_VERBOSE;
++ return 1;
+ }
+-#endif /* !CONFIG_XEN */
+
+-int get_physical_broadcast(void)
+-{
+- return 0xff;
+-}
++__setup("apic=", apic_set_verbosity);
+
+ int setup_profiling_timer(unsigned int multiplier)
+ {
+Index: head-2008-10-21/arch/x86/kernel/apic_64-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/apic_64-xen.c 2008-10-21 13:30:34.000000000 +0200
++++ /dev/null 1970-01-01 00:00:00.000000000 +0000
+@@ -1,188 +0,0 @@
+-/*
+- * Local APIC handling, local APIC timers
+- *
+- * (c) 1999, 2000 Ingo Molnar <mingo@redhat.com>
+- *
+- * Fixes
+- * Maciej W. Rozycki : Bits for genuine 82489DX APICs;
+- * thanks to Eric Gilmore
+- * and Rolf G. Tews
+- * for testing these extensively.
+- * Maciej W. Rozycki : Various updates and fixes.
+- * Mikael Pettersson : Power Management for UP-APIC.
+- * Pavel Machek and
+- * Mikael Pettersson : PM converted to driver model.
+- */
+-
+-#include <linux/init.h>
+-
+-#include <linux/mm.h>
+-#include <linux/delay.h>
+-#include <linux/bootmem.h>
+-#include <linux/interrupt.h>
+-#include <linux/mc146818rtc.h>
+-#include <linux/kernel_stat.h>
+-#include <linux/sysdev.h>
+-#include <linux/module.h>
+-
+-#include <asm/atomic.h>
+-#include <asm/smp.h>
+-#include <asm/mtrr.h>
+-#include <asm/mpspec.h>
+-#include <asm/desc.h>
+-#include <asm/arch_hooks.h>
+-#include <asm/hpet.h>
+-#include <asm/idle.h>
+-
+-int disable_apic;
+-
+-/*
+- * Debug level, exported for io_apic.c
+- */
+-unsigned int apic_verbosity;
+-
+-/* Have we found an MP table */
+-int smp_found_config;
+-
+-/*
+- * The guts of the apic timer interrupt
+- */
+-static void local_apic_timer_interrupt(void)
+-{
+-#ifndef CONFIG_XEN
+- int cpu = smp_processor_id();
+- struct clock_event_device *evt = &per_cpu(lapic_events, cpu);
+-
+- /*
+- * Normally we should not be here till LAPIC has been initialized but
+- * in some cases like kdump, its possible that there is a pending LAPIC
+- * timer interrupt from previous kernel's context and is delivered in
+- * new kernel the moment interrupts are enabled.
+- *
+- * Interrupts are enabled early and LAPIC is setup much later, hence
+- * its possible that when we get here evt->event_handler is NULL.
+- * Check for event_handler being NULL and discard the interrupt as
+- * spurious.
+- */
+- if (!evt->event_handler) {
+- printk(KERN_WARNING
+- "Spurious LAPIC timer interrupt on cpu %d\n", cpu);
+- /* Switch it off */
+- lapic_timer_setup(CLOCK_EVT_MODE_SHUTDOWN, evt);
+- return;
+- }
+-#endif
+-
+- /*
+- * the NMI deadlock-detector uses this.
+- */
+- add_pda(apic_timer_irqs, 1);
+-
+-#ifndef CONFIG_XEN
+- evt->event_handler(evt);
+-#endif
+-}
+-
+-/*
+- * Local APIC timer interrupt. This is the most natural way for doing
+- * local interrupts, but local timer interrupts can be emulated by
+- * broadcast interrupts too. [in case the hw doesn't support APIC timers]
+- *
+- * [ if a single-CPU system runs an SMP kernel then we call the local
+- * interrupt as well. Thus we cannot inline the local irq ... ]
+- */
+-void smp_apic_timer_interrupt(struct pt_regs *regs)
+-{
+- struct pt_regs *old_regs = set_irq_regs(regs);
+-
+- /*
+- * NOTE! We'd better ACK the irq immediately,
+- * because timer handling can be slow.
+- */
+- ack_APIC_irq();
+- /*
+- * update_process_times() expects us to have done irq_enter().
+- * Besides, if we don't timer interrupts ignore the global
+- * interrupt lock, which is the WrongThing (tm) to do.
+- */
+- exit_idle();
+- irq_enter();
+- local_apic_timer_interrupt();
+- irq_exit();
+- set_irq_regs(old_regs);
+-}
+-
+-int setup_profiling_timer(unsigned int multiplier)
+-{
+- return -EINVAL;
+-}
+-
+-/*
+- * This initializes the IO-APIC and APIC hardware if this is
+- * a UP kernel.
+- */
+-int __init APIC_init_uniprocessor(void)
+-{
+-#ifdef CONFIG_X86_IO_APIC
+- if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
+- setup_IO_APIC();
+-#endif
+-
+- return 1;
+-}
+-
+-/*
+- * Local APIC interrupts
+- */
+-
+-/*
+- * This interrupt should _never_ happen with our APIC/SMP architecture
+- */
+-asmlinkage void smp_spurious_interrupt(void)
+-{
+- unsigned int v;
+- exit_idle();
+- irq_enter();
+- /*
+- * Check if this really is a spurious interrupt and ACK it
+- * if it is a vectored one. Just in case...
+- * Spurious interrupts should not be ACKed.
+- */
+- v = apic_read(APIC_ISR + ((SPURIOUS_APIC_VECTOR & ~0x1f) >> 1));
+- if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
+- ack_APIC_irq();
+-
+- add_pda(irq_spurious_count, 1);
+- irq_exit();
+-}
+-
+-/*
+- * This interrupt should never happen with our APIC/SMP architecture
+- */
+-asmlinkage void smp_error_interrupt(void)
+-{
+- unsigned int v, v1;
+-
+- exit_idle();
+- irq_enter();
+- /* First tickle the hardware, only then report what went on. -- REW */
+- v = apic_read(APIC_ESR);
+- apic_write(APIC_ESR, 0);
+- v1 = apic_read(APIC_ESR);
+- ack_APIC_irq();
+- atomic_inc(&irq_err_count);
+-
+- /* Here is what the APIC error bits mean:
+- 0: Send CS error
+- 1: Receive CS error
+- 2: Send accept error
+- 3: Receive accept error
+- 4: Reserved
+- 5: Send illegal vector
+- 6: Received illegal vector
+- 7: Illegal register address
+- */
+- printk (KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
+- smp_processor_id(), v , v1);
+- irq_exit();
+-}
+Index: head-2008-10-21/arch/x86/kernel/cpu/common-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/cpu/common-xen.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/cpu/common-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -18,10 +18,6 @@
+ #include <asm/mpspec.h>
+ #include <asm/apic.h>
+ #include <mach_apic.h>
+-#else
+-#ifdef CONFIG_XEN
+-#define phys_pkg_id(a,b) a
+-#endif
+ #endif
+ #include <asm/hypervisor.h>
+
+Index: head-2008-10-21/arch/x86/kernel/genapic_64-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/genapic_64-xen.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/genapic_64-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -18,7 +18,6 @@
+ #include <linux/hardirq.h>
+
+ #include <asm/smp.h>
+-#include <asm/ipi.h>
+ #include <asm/genapic.h>
+
+ #ifdef CONFIG_ACPI
+@@ -73,7 +72,7 @@ void __init setup_apic_routing(void)
+ /* Same for both flat and physical. */
+
+ #ifdef CONFIG_XEN
+-extern void xen_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest);
++extern void xen_send_IPI_shortcut(unsigned int shortcut, int vector);
+ #endif
+
+ void send_IPI_self(int vector)
+@@ -81,7 +80,7 @@ void send_IPI_self(int vector)
+ #ifndef CONFIG_XEN
+ __send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
+ #else
+- xen_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
++ xen_send_IPI_shortcut(APIC_DEST_SELF, vector);
+ #endif
+ }
+
+Index: head-2008-10-21/arch/x86/kernel/genapic_xen_64.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/genapic_xen_64.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/genapic_xen_64.c 2008-10-21 13:44:08.000000000 +0200
+@@ -18,7 +18,6 @@
+ #include <linux/init.h>
+ #ifdef CONFIG_XEN_PRIVILEGED_GUEST
+ #include <asm/smp.h>
+-#include <asm/ipi.h>
+ #else
+ #include <asm/apic.h>
+ #endif
+@@ -34,7 +33,7 @@ static inline void __send_IPI_one(unsign
+ notify_remote_via_irq(irq);
+ }
+
+-void xen_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest)
++void xen_send_IPI_shortcut(unsigned int shortcut, int vector)
+ {
+ int cpu;
+
+@@ -91,12 +90,12 @@ static void xen_send_IPI_allbutself(int
+ * thus we have to avoid sending IPIs in this case.
+ */
+ if (num_online_cpus() > 1)
+- xen_send_IPI_shortcut(APIC_DEST_ALLBUT, vector, APIC_DEST_LOGICAL);
++ xen_send_IPI_shortcut(APIC_DEST_ALLBUT, vector);
+ }
+
+ static void xen_send_IPI_all(int vector)
+ {
+- xen_send_IPI_shortcut(APIC_DEST_ALLINC, vector, APIC_DEST_LOGICAL);
++ xen_send_IPI_shortcut(APIC_DEST_ALLINC, vector);
+ }
+
+ static void xen_send_IPI_mask(cpumask_t cpumask, int vector)
+@@ -126,7 +125,7 @@ static int xen_apic_id_registered(void)
+
+ static unsigned int xen_cpu_mask_to_apicid(cpumask_t cpumask)
+ {
+- return cpus_addr(cpumask)[0] & APIC_ALL_CPUS;
++ return cpus_addr(cpumask)[0];
+ }
+
+ static unsigned int phys_pkg_id(int index_msb)
+@@ -142,7 +141,7 @@ struct genapic apic_xen = {
+ #ifdef CONFIG_XEN_PRIVILEGED_GUEST
+ .int_delivery_mode = dest_LowestPrio,
+ #endif
+- .int_dest_mode = (APIC_DEST_LOGICAL != 0),
++ .int_dest_mode = 1,
+ .target_cpus = xen_target_cpus,
+ .vector_allocation_domain = xen_vector_allocation_domain,
+ #ifdef CONFIG_XEN_PRIVILEGED_GUEST
+Index: head-2008-10-21/arch/x86/kernel/io_apic_32-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/io_apic_32-xen.c 2008-10-21 13:43:37.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/io_apic_32-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -48,7 +48,6 @@
+ #include <asm/hypertransport.h>
+
+ #include <mach_apic.h>
+-#include <mach_apicdef.h>
+
+ #ifdef CONFIG_XEN
+ #include <xen/interface/xen.h>
+@@ -63,10 +62,10 @@
+ unsigned long io_apic_irqs;
+
+ #define clear_IO_APIC() ((void)0)
+-#endif /* CONFIG_XEN */
+-
++#else
+ int (*ioapic_renumber_irq)(int ioapic, int irq);
+ atomic_t irq_mis_count;
++#endif /* CONFIG_XEN */
+
+ /* Where if anywhere is the i8259 connect in external int mode */
+ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
+@@ -74,7 +73,9 @@ static struct { int pin, apic; } ioapic_
+ static DEFINE_SPINLOCK(ioapic_lock);
+ static DEFINE_SPINLOCK(vector_lock);
+
++#ifndef CONFIG_XEN
+ int timer_through_8259 __initdata;
++#endif
+
+ /*
+ * Is the SiS APIC rmw bug present ?
+@@ -103,7 +104,9 @@ int mp_bus_id_to_type[MAX_MP_BUSSES];
+
+ DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
+
++#ifndef CONFIG_XEN
+ static int disable_timer_pin_1 __initdata;
++#endif
+
+ /*
+ * Rough estimation of how many shared IRQs there are, can
+@@ -1171,11 +1174,13 @@ static int pin_2_irq(int idx, int apic,
+ irq += nr_ioapic_registers[i++];
+ irq += pin;
+
++#ifndef CONFIG_XEN
+ /*
+ * For MPS mode, so far only needed by ES7000 platform
+ */
+ if (ioapic_renumber_irq)
+ irq = ioapic_renumber_irq(apic, irq);
++#endif
+ }
+
+ /*
+@@ -2918,6 +2923,7 @@ int acpi_get_override_irq(int bus_irq, i
+
+ #endif /* CONFIG_ACPI */
+
++#ifndef CONFIG_XEN
+ static int __init parse_disable_timer_pin_1(char *arg)
+ {
+ disable_timer_pin_1 = 1;
+@@ -2931,6 +2937,7 @@ static int __init parse_enable_timer_pin
+ return 0;
+ }
+ early_param("enable_timer_pin_1", parse_enable_timer_pin_1);
++#endif
+
+ static int __init parse_noapic(char *arg)
+ {
+Index: head-2008-10-21/arch/x86/kernel/io_apic_64-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/io_apic_64-xen.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/io_apic_64-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -78,10 +78,6 @@ char system_vectors[NR_VECTORS] = { [0 .
+
+ int sis_apic_bug; /* not actually supported, dummy for compile */
+
+-static int no_timer_check;
+-
+-static int disable_timer_pin_1 __initdata;
+-
+ #ifdef CONFIG_XEN
+ #include <xen/interface/xen.h>
+ #include <xen/interface/physdev.h>
+@@ -96,6 +92,10 @@ unsigned long io_apic_irqs;
+
+ #define clear_IO_APIC() ((void)0)
+ #else
++static int no_timer_check;
++
++static int disable_timer_pin_1 __initdata;
++
+ int timer_through_8259 __initdata;
+
+ /* Where if anywhere is the i8259 connect in external int mode */
+@@ -485,6 +485,7 @@ static int __init parse_noapic(char *str
+ }
+ early_param("noapic", parse_noapic);
+
++#ifndef CONFIG_XEN
+ /* Actually the next is obsolete, but keep it for paranoid reasons -AK */
+ static int __init disable_timer_pin_setup(char *arg)
+ {
+@@ -492,6 +493,7 @@ static int __init disable_timer_pin_setu
+ return 1;
+ }
+ __setup("disable_timer_pin_1", disable_timer_pin_setup);
++#endif
+
+
+ /*
+@@ -1814,10 +1816,6 @@ static inline void __init check_timer(vo
+ out:
+ local_irq_restore(flags);
+ }
+-#else
+-#define check_timer() ((void)0)
+-int timer_uses_ioapic_pin_0 = 0;
+-#endif /* !CONFIG_XEN */
+
+ static int __init notimercheck(char *s)
+ {
+@@ -1825,6 +1823,10 @@ static int __init notimercheck(char *s)
+ return 1;
+ }
+ __setup("no_timer_check", notimercheck);
++#else
++#define check_timer() ((void)0)
++int timer_uses_ioapic_pin_0 = 0;
++#endif /* !CONFIG_XEN */
+
+ /*
+ *
+Index: head-2008-10-21/arch/x86/kernel/irq_32-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/irq_32-xen.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/irq_32-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -252,7 +252,9 @@ unsigned int do_IRQ(struct pt_regs *regs
+ * Interrupt statistics:
+ */
+
++#ifndef CONFIG_XEN
+ atomic_t irq_err_count;
++#endif
+
+ /*
+ * /proc/interrupts printing:
+@@ -308,7 +310,7 @@ skip:
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", nmi_count(j));
+ seq_printf(p, " Non-maskable interrupts\n");
+-#ifdef CONFIG_X86_LOCAL_APIC
++#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
+ seq_printf(p, "LOC: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ",
+@@ -341,6 +343,7 @@ skip:
+ per_cpu(irq_stat,j).irq_thermal_count);
+ seq_printf(p, " Thermal event interrupts\n");
+ #endif
++#ifndef CONFIG_XEN
+ #ifdef CONFIG_X86_LOCAL_APIC
+ seq_printf(p, "SPU: ");
+ for_each_online_cpu(j)
+@@ -352,6 +355,7 @@ skip:
+ #if defined(CONFIG_X86_IO_APIC)
+ seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
+ #endif
++#endif
+ }
+ return 0;
+ }
+@@ -384,12 +388,16 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
+
+ u64 arch_irq_stat(void)
+ {
++#ifndef CONFIG_XEN
+ u64 sum = atomic_read(&irq_err_count);
+
+ #ifdef CONFIG_X86_IO_APIC
+ sum += atomic_read(&irq_mis_count);
+ #endif
+ return sum;
++#else
++ return 0;
++#endif
+ }
+
+ #ifdef CONFIG_HOTPLUG_CPU
+Index: head-2008-10-21/arch/x86/kernel/irq_64-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/irq_64-xen.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/irq_64-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -18,7 +18,9 @@
+ #include <asm/idle.h>
+ #include <asm/smp.h>
+
++#ifndef CONFIG_XEN
+ atomic_t irq_err_count;
++#endif
+
+ /*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+@@ -27,19 +29,6 @@ atomic_t irq_err_count;
+ void ack_bad_irq(unsigned int irq)
+ {
+ printk(KERN_WARNING "unexpected IRQ trap at irq %02x\n", irq);
+-#ifdef CONFIG_X86_LOCAL_APIC
+- /*
+- * Currently unexpected vectors happen only on SMP and APIC.
+- * We _must_ ack these because every local APIC has only N
+- * irq slots per priority level, and a 'hanging, unacked' IRQ
+- * holds up an irq slot - in excessive cases (when multiple
+- * unexpected vectors occur) that might lock up the APIC
+- * completely.
+- * But don't ack when the APIC is disabled. -AK
+- */
+- if (!disable_apic)
+- ack_APIC_irq();
+-#endif
+ }
+
+ #ifdef CONFIG_DEBUG_STACKOVERFLOW
+@@ -119,7 +108,7 @@ skip:
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", cpu_pda(j)->__nmi_count);
+ seq_printf(p, " Non-maskable interrupts\n");
+-#ifdef CONFIG_X86_LOCAL_APIC
++#ifndef CONFIG_XEN
+ seq_printf(p, "LOC: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", cpu_pda(j)->apic_timer_irqs);
+@@ -151,13 +140,13 @@ skip:
+ seq_printf(p, "%10u ", cpu_pda(j)->irq_threshold_count);
+ seq_printf(p, " Threshold APIC interrupts\n");
+ #endif
+-#ifdef CONFIG_X86_LOCAL_APIC
++#ifndef CONFIG_XEN
+ seq_printf(p, "SPU: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", cpu_pda(j)->irq_spurious_count);
+ seq_printf(p, " Spurious interrupts\n");
+-#endif
+ seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
++#endif
+ }
+ return 0;
+ }
+@@ -187,7 +176,11 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
+
+ u64 arch_irq_stat(void)
+ {
++#ifndef CONFIG_XEN
+ return atomic_read(&irq_err_count);
++#else
++ return 0;
++#endif
+ }
+
+ /*
+Index: head-2008-10-21/arch/x86/kernel/mpparse-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/mpparse-xen.c 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/mpparse-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -31,7 +31,6 @@
+
+ #include <mach_apic.h>
+ #ifdef CONFIG_X86_32
+-#include <mach_apicdef.h>
+ #include <mach_mpparse.h>
+ #endif
+
+@@ -285,7 +284,9 @@ static int __init smp_check_mpc(struct m
+
+ printk(KERN_INFO "MPTABLE: Product ID: %s\n", str);
+
++#ifndef CONFIG_XEN
+ printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->mpc_lapic);
++#endif
+
+ return 1;
+ }
+@@ -313,9 +314,11 @@ static int __init smp_read_mpc(struct mp
+ } else
+ mps_oem_check(mpc, oem, str);
+ #endif
++#ifndef CONFIG_XEN
+ /* save the local APIC address, it might be non-default */
+ if (!acpi_lapic)
+ mp_lapic_addr = mpc->mpc_lapic;
++#endif
+
+ if (early)
+ return 1;
+@@ -546,10 +549,12 @@ static inline void __init construct_defa
+ int linttypes[2] = { mp_ExtINT, mp_NMI };
+ int i;
+
++#ifndef CONFIG_XEN
+ /*
+ * local APIC has default address
+ */
+ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
++#endif
+
+ /*
+ * 2 CPUs, numbered 0 & 1.
+@@ -625,10 +630,12 @@ static void __init __get_smp_config(unsi
+ */
+ if (mpf->mpf_feature1 != 0) {
+ if (early) {
++#ifndef CONFIG_XEN
+ /*
+ * local APIC has default address
+ */
+ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
++#endif
+ return;
+ }
+
+Index: head-2008-10-21/arch/x86/kernel/traps_64-xen.c
+===================================================================
+--- head-2008-10-21.orig/arch/x86/kernel/traps_64-xen.c 2008-10-21 13:44:06.000000000 +0200
++++ head-2008-10-21/arch/x86/kernel/traps_64-xen.c 2008-10-21 13:44:08.000000000 +0200
+@@ -1170,15 +1170,15 @@ asmlinkage void do_spurious_interrupt_bu
+ {
+ }
+
+-#if 0
++#ifndef CONFIG_XEN
+ asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
+ {
+ }
+-#endif
+
+ asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
+ {
+ }
++#endif
+
+ /*
+ * 'math_state_restore()' saves the current math information in the
+Index: head-2008-10-21/include/asm-x86/apic.h
+===================================================================
+--- head-2008-10-21.orig/include/asm-x86/apic.h 2008-10-21 13:25:32.000000000 +0200
++++ head-2008-10-21/include/asm-x86/apic.h 2008-10-21 13:44:08.000000000 +0200
+@@ -5,7 +5,9 @@
+ #include <linux/delay.h>
+
+ #include <asm/alternative.h>
++#ifndef CONFIG_XEN
+ #include <asm/fixmap.h>
++#endif
+ #include <asm/apicdef.h>
+ #include <asm/processor.h>
+ #include <asm/system.h>
+@@ -40,6 +42,7 @@ extern void generic_apic_probe(void);
+ #ifdef CONFIG_X86_LOCAL_APIC
+
+ extern unsigned int apic_verbosity;
++#ifndef CONFIG_XEN
+ extern int local_apic_timer_c2_ok;
+
+ extern int ioapic_force;
+@@ -141,6 +144,7 @@ static inline void ack_APIC_irq(void)
+ /* Docs say use 0 for future compatibility */
+ apic_write(APIC_EOI, 0);
+ }
++#endif
+
+ extern int lapic_get_maxlvt(void);
+ extern void clear_local_APIC(void);
+Index: head-2008-10-21/include/asm-x86/apicdef.h
+===================================================================
+--- head-2008-10-21.orig/include/asm-x86/apicdef.h 2008-10-21 12:57:02.000000000 +0200
++++ head-2008-10-21/include/asm-x86/apicdef.h 2008-10-21 13:44:08.000000000 +0200
+@@ -1,6 +1,8 @@
+ #ifndef _ASM_X86_APICDEF_H
+ #define _ASM_X86_APICDEF_H
+
++#ifndef CONFIG_XEN
++
+ /*
+ * Constants for various Intel APICs. (local APIC, IOAPIC, etc.)
+ *
+@@ -132,6 +134,16 @@
+ #define APIC_BASE_MSR 0x800
+ #define X2APIC_ENABLE (1UL << 10)
+
++#else /* CONFIG_XEN */
++
++enum {
++ APIC_DEST_ALLBUT = 0x1,
++ APIC_DEST_SELF,
++ APIC_DEST_ALLINC
++};
++
++#endif /* CONFIG_XEN */
++
+ #ifdef CONFIG_X86_32
+ # define MAX_IO_APICS 64
+ #else
+@@ -139,6 +151,8 @@
+ # define MAX_LOCAL_APIC 32768
+ #endif
+
++#ifndef CONFIG_XEN
++
+ /*
+ * All x86-64 systems are xAPIC compatible.
+ * In the following, "apicid" is a physical APIC ID.
+@@ -409,6 +423,8 @@ struct local_apic {
+
+ #undef u32
+
++#endif /* CONFIG_XEN */
++
+ #ifdef CONFIG_X86_32
+ #define BAD_APICID 0xFFu
+ #else
+Index: head-2008-10-21/include/asm-x86/ipi.h
+===================================================================
+--- head-2008-10-21.orig/include/asm-x86/ipi.h 2008-10-21 12:57:02.000000000 +0200
++++ head-2008-10-21/include/asm-x86/ipi.h 2008-10-21 13:44:08.000000000 +0200
+@@ -1,6 +1,8 @@
+ #ifndef __ASM_IPI_H
+ #define __ASM_IPI_H
+
++#ifndef CONFIG_XEN
++
+ /*
+ * Copyright 2004 James Cleverdon, IBM.
+ * Subject to the GNU Public License, v.2
+@@ -135,4 +137,6 @@ static inline void send_IPI_mask_sequenc
+ local_irq_restore(flags);
+ }
+
++#endif /* CONFIG_XEN */
++
+ #endif /* __ASM_IPI_H */
+Index: head-2008-10-21/include/asm-x86/mach-xen/asm/fixmap_32.h
+===================================================================
+--- head-2008-10-21.orig/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/include/asm-x86/mach-xen/asm/fixmap_32.h 2008-10-21 13:44:08.000000000 +0200
+@@ -55,10 +55,10 @@ enum fixed_addresses {
+ FIX_VDSO,
+ FIX_DBGP_BASE,
+ FIX_EARLYCON_MEM_BASE,
++#ifndef CONFIG_XEN
+ #ifdef CONFIG_X86_LOCAL_APIC
+ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+ #endif
+-#ifndef CONFIG_XEN
+ #ifdef CONFIG_X86_IO_APIC
+ FIX_IO_APIC_BASE_0,
+ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS-1,
+Index: head-2008-10-21/include/asm-x86/mach-xen/asm/fixmap_64.h
+===================================================================
+--- head-2008-10-21.orig/include/asm-x86/mach-xen/asm/fixmap_64.h 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/include/asm-x86/mach-xen/asm/fixmap_64.h 2008-10-21 13:44:08.000000000 +0200
+@@ -13,7 +13,6 @@
+
+ #include <linux/kernel.h>
+ #include <asm/acpi.h>
+-#include <asm/apicdef.h>
+ #include <asm/page.h>
+ #include <asm/vsyscall.h>
+ #include <asm/efi.h>
+@@ -41,10 +40,8 @@ enum fixed_addresses {
+ VSYSCALL_HPET,
+ FIX_DBGP_BASE,
+ FIX_EARLYCON_MEM_BASE,
+-#ifdef CONFIG_X86_LOCAL_APIC
+- FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+-#endif
+ #ifndef CONFIG_XEN
++ FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
+ FIX_IO_APIC_BASE_0,
+ FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS - 1,
+ #endif
+Index: head-2008-10-21/include/asm-x86/mach-xen/asm/smp.h
+===================================================================
+--- head-2008-10-21.orig/include/asm-x86/mach-xen/asm/smp.h 2008-10-21 13:30:34.000000000 +0200
++++ head-2008-10-21/include/asm-x86/mach-xen/asm/smp.h 2008-10-21 13:44:08.000000000 +0200
+@@ -16,7 +16,7 @@
+ # endif
+ #endif
+ #include <asm/pda.h>
+-#include <asm/thread_info.h>
++#include <linux/thread_info.h>
+
+ #define cpu_callout_map cpu_possible_map
+ extern cpumask_t cpu_initialized;
+@@ -178,7 +178,7 @@ DECLARE_PER_CPU(int, cpu_number);
+ #define stack_smp_processor_id() 0
+ #endif
+
+-#ifdef CONFIG_X86_LOCAL_APIC
++#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
+
+ static inline int logical_smp_processor_id(void)
+ {
+Index: head-2008-10-21/include/asm-x86/mach-xen/mach_apic.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ head-2008-10-21/include/asm-x86/mach-xen/mach_apic.h 2008-10-21 13:44:08.000000000 +0200
+@@ -0,0 +1,56 @@
++#ifndef __ASM_MACH_APIC_H
++#define __ASM_MACH_APIC_H
++
++#include <linux/cpumask.h>
++
++#ifdef CONFIG_X86_64
++
++#include <asm/genapic.h>
++#define INT_DELIVERY_MODE (genapic->int_delivery_mode)
++#define INT_DEST_MODE (genapic->int_dest_mode)
++#define TARGET_CPUS (genapic->target_cpus())
++#define apic_id_registered (genapic->apic_id_registered)
++#define init_apic_ldr (genapic->init_apic_ldr)
++#define cpu_mask_to_apicid (genapic->cpu_mask_to_apicid)
++#define phys_pkg_id (genapic->phys_pkg_id)
++#define vector_allocation_domain (genapic->vector_allocation_domain)
++extern void setup_apic_routing(void);
++
++#else
++
++#ifdef CONFIG_SMP
++#define TARGET_CPUS cpu_online_map
++#else
++#define TARGET_CPUS cpumask_of_cpu(0)
++#endif
++
++#define INT_DELIVERY_MODE dest_LowestPrio
++#define INT_DEST_MODE 1
++
++static inline u32 phys_pkg_id(u32 cpuid_apic, int index_msb)
++{
++ return cpuid_apic;
++}
++
++static inline void setup_apic_routing(void)
++{
++}
++
++static inline int multi_timer_check(int apic, int irq)
++{
++ return 0;
++}
++
++static inline int apicid_to_node(int logical_apicid)
++{
++ return 0;
++}
++
++static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
++{
++ return cpus_addr(cpumask)[0];
++}
++
++#endif /* CONFIG_X86_64 */
++
++#endif /* __ASM_MACH_APIC_H */
--- /dev/null
+From: jbeulich@novell.com
+Subject: consolidate pmd/pud/pgd entry handling
+Patch-mainline: obsolete
+
+Index: head-2008-12-01/arch/x86/mm/hypervisor.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/hypervisor.c 2008-12-01 12:10:32.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/hypervisor.c 2008-12-01 12:13:06.000000000 +0100
+@@ -356,31 +356,91 @@ void xen_l1_entry_update(pte_t *ptr, pte
+ }
+ EXPORT_SYMBOL_GPL(xen_l1_entry_update);
+
++static void do_lN_entry_update(mmu_update_t *mmu, unsigned int mmu_count,
++ struct page *page)
++{
++ if (likely(page)) {
++ multicall_entry_t mcl[2];
++ unsigned long pfn = page_to_pfn(page);
++
++ MULTI_update_va_mapping(mcl,
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, PAGE_KERNEL_RO), 0);
++ SetPagePinned(page);
++ MULTI_mmu_update(mcl + 1, mmu, mmu_count, NULL, DOMID_SELF);
++ if (unlikely(HYPERVISOR_multicall_check(mcl, 2, NULL)))
++ BUG();
++ } else if (unlikely(HYPERVISOR_mmu_update(mmu, mmu_count,
++ NULL, DOMID_SELF) < 0))
++ BUG();
++}
++
+ void xen_l2_entry_update(pmd_t *ptr, pmd_t val)
+ {
+ mmu_update_t u;
++ struct page *page = NULL;
++
++ if (likely(pmd_present(val)) && likely(!pmd_large(val))
++ && likely(mem_map)
++ && likely(PagePinned(virt_to_page(ptr)))) {
++ page = pmd_page(val);
++ if (unlikely(PagePinned(page)))
++ page = NULL;
++ else if (PageHighMem(page)) {
++#ifdef CONFIG_HIGHPTE
++ BUG();
++#endif
++ kmap_flush_unused();
++ page = NULL;
++ }
++ }
+ u.ptr = virt_to_machine(ptr);
+ u.val = __pmd_val(val);
+- BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0);
++ do_lN_entry_update(&u, 1, page);
+ }
+
+ #if defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
+ void xen_l3_entry_update(pud_t *ptr, pud_t val)
+ {
+ mmu_update_t u;
++ struct page *page = NULL;
++
++ if (likely(pud_present(val))
++#ifdef CONFIG_X86_64
++ && likely(!pud_large(val))
++#endif
++ && likely(mem_map)
++ && likely(PagePinned(virt_to_page(ptr)))) {
++ page = pud_page(val);
++ if (unlikely(PagePinned(page)))
++ page = NULL;
++ }
+ u.ptr = virt_to_machine(ptr);
+ u.val = __pud_val(val);
+- BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0);
++ do_lN_entry_update(&u, 1, page);
+ }
+ #endif
+
+ #ifdef CONFIG_X86_64
+-void xen_l4_entry_update(pgd_t *ptr, pgd_t val)
++void xen_l4_entry_update(pgd_t *ptr, int user, pgd_t val)
+ {
+- mmu_update_t u;
+- u.ptr = virt_to_machine(ptr);
+- u.val = __pgd_val(val);
+- BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0);
++ mmu_update_t u[2];
++ struct page *page = NULL;
++
++ if (likely(pgd_present(val)) && likely(mem_map)
++ && likely(PagePinned(virt_to_page(ptr)))) {
++ page = pgd_page(val);
++ if (unlikely(PagePinned(page)))
++ page = NULL;
++ }
++ u[0].ptr = virt_to_machine(ptr);
++ u[0].val = __pgd_val(val);
++ if (user) {
++ u[1].ptr = virt_to_machine(__user_pgd(ptr));
++ u[1].val = __pgd_val(val);
++ do_lN_entry_update(u, 2, page);
++ } else
++ do_lN_entry_update(u, 1, page);
+ }
+ #endif /* CONFIG_X86_64 */
+
+Index: head-2008-12-01/arch/x86/mm/init_32-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_32-xen.c 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_32-xen.c 2008-12-01 12:13:06.000000000 +0100
+@@ -681,6 +681,8 @@ static void __init zone_sizes_init(void)
+ #endif
+
+ free_area_init_nodes(max_zone_pfns);
++
++ xen_init_pgd_pin();
+ }
+
+ void __init setup_bootmem_allocator(void)
+@@ -1040,8 +1042,6 @@ void __init mem_init(void)
+ cpa_init();
+ save_pg_dir();
+ zap_low_mappings();
+-
+- SetPagePinned(virt_to_page(init_mm.pgd));
+ }
+
+ #ifdef CONFIG_MEMORY_HOTPLUG
+Index: head-2008-12-01/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_64-xen.c 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_64-xen.c 2008-12-01 12:13:06.000000000 +0100
+@@ -195,7 +195,10 @@ set_pte_vaddr_pud(pud_t *pud_page, unsig
+ if (pud_none(*pud)) {
+ pmd = (pmd_t *) spp_getpage();
+ make_page_readonly(pmd, XENFEAT_writable_page_tables);
+- pud_populate(&init_mm, pud, pmd);
++ if (!after_bootmem)
++ xen_l3_entry_update(pud, __pud(__pa(pmd) | _PAGE_TABLE));
++ else
++ pud_populate(&init_mm, pud, pmd);
+ if (pmd != pmd_offset(pud, 0)) {
+ printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n",
+ pmd, pmd_offset(pud, 0));
+@@ -462,7 +465,6 @@ phys_pmd_init(pmd_t *pmd_page, unsigned
+ early_make_page_readonly(pte, XENFEAT_writable_page_tables);
+ *pmd = __pmd(pte_phys | _PAGE_TABLE);
+ } else {
+- make_page_readonly(pte, XENFEAT_writable_page_tables);
+ spin_lock(&init_mm.page_table_lock);
+ pmd_populate_kernel(&init_mm, pmd, __va(pte_phys));
+ spin_unlock(&init_mm.page_table_lock);
+@@ -529,7 +531,6 @@ phys_pud_init(pud_t *pud_page, unsigned
+ else
+ *pud = __pud(pmd_phys | _PAGE_TABLE);
+ } else {
+- make_page_readonly(pmd, XENFEAT_writable_page_tables);
+ spin_lock(&init_mm.page_table_lock);
+ pud_populate(&init_mm, pud, __va(pmd_phys));
+ spin_unlock(&init_mm.page_table_lock);
+@@ -824,7 +825,6 @@ static unsigned long __init kernel_physi
+ early_make_page_readonly(pud, XENFEAT_writable_page_tables);
+ xen_l4_entry_update(pgd, __pgd(pud_phys | _PAGE_TABLE));
+ } else {
+- make_page_readonly(pud, XENFEAT_writable_page_tables);
+ spin_lock(&init_mm.page_table_lock);
+ pgd_populate(&init_mm, pgd, __va(pud_phys));
+ spin_unlock(&init_mm.page_table_lock);
+@@ -1013,7 +1013,7 @@ void __init paging_init(void)
+ sparse_init();
+ free_area_init_nodes(max_zone_pfns);
+
+- SetPagePinned(virt_to_page(init_mm.pgd));
++ xen_init_pgd_pin();
+ }
+ #endif
+
+Index: head-2008-12-01/arch/x86/mm/ioremap-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/ioremap-xen.c 2008-12-01 12:07:15.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/ioremap-xen.c 2008-12-01 12:13:06.000000000 +0100
+@@ -678,7 +678,7 @@ void __init early_ioremap_clear(void)
+ printk(KERN_INFO "early_ioremap_clear()\n");
+
+ pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
+- pmd_clear(pmd);
++ xen_l2_entry_update(pmd, __pmd(0));
+ make_lowmem_page_writable(bm_pte, XENFEAT_writable_page_tables);
+ /* paravirt_release_pte(__pa(bm_pte) >> PAGE_SHIFT); */
+ __flush_tlb_all();
+Index: head-2008-12-01/arch/x86/mm/pgtable-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable-xen.c 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable-xen.c 2008-12-01 12:13:06.000000000 +0100
+@@ -42,16 +42,16 @@ pgtable_t pte_alloc_one(struct mm_struct
+ void __pte_free(pgtable_t pte)
+ {
+ if (!PageHighMem(pte)) {
+- unsigned long va = (unsigned long)page_address(pte);
+- unsigned int level;
+- pte_t *ptep = lookup_address(va, &level);
+-
+- BUG_ON(!ptep || level != PG_LEVEL_4K || !pte_present(*ptep));
+- if (!pte_write(*ptep)
+- && HYPERVISOR_update_va_mapping(va,
+- mk_pte(pte, PAGE_KERNEL),
+- 0))
+- BUG();
++ if (PagePinned(pte)) {
++ unsigned long pfn = page_to_pfn(pte);
++
++ if (HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn,
++ PAGE_KERNEL),
++ 0))
++ BUG();
++ ClearPagePinned(pte);
++ }
+ } else
+ #ifdef CONFIG_HIGHPTE
+ ClearPagePinned(pte);
+@@ -93,14 +93,15 @@ pmd_t *pmd_alloc_one(struct mm_struct *m
+
+ void __pmd_free(pgtable_t pmd)
+ {
+- unsigned long va = (unsigned long)page_address(pmd);
+- unsigned int level;
+- pte_t *ptep = lookup_address(va, &level);
+-
+- BUG_ON(!ptep || level != PG_LEVEL_4K || !pte_present(*ptep));
+- if (!pte_write(*ptep)
+- && HYPERVISOR_update_va_mapping(va, mk_pte(pmd, PAGE_KERNEL), 0))
+- BUG();
++ if (PagePinned(pmd)) {
++ unsigned long pfn = page_to_pfn(pmd);
++
++ if (HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, PAGE_KERNEL),
++ 0))
++ BUG();
++ ClearPagePinned(pmd);
++ }
+
+ ClearPageForeign(pmd);
+ init_page_count(pmd);
+@@ -192,21 +193,20 @@ static inline unsigned int pgd_walk_set_
+ {
+ unsigned long pfn = page_to_pfn(page);
+
+- if (PageHighMem(page)) {
+- if (pgprot_val(flags) & _PAGE_RW)
+- ClearPagePinned(page);
+- else
+- SetPagePinned(page);
+- } else {
+- MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
+- (unsigned long)__va(pfn << PAGE_SHIFT),
+- pfn_pte(pfn, flags), 0);
+- if (unlikely(++seq == PIN_BATCH)) {
+- if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
+- PIN_BATCH, NULL)))
+- BUG();
+- seq = 0;
+- }
++ if (pgprot_val(flags) & _PAGE_RW)
++ ClearPagePinned(page);
++ else
++ SetPagePinned(page);
++ if (PageHighMem(page))
++ return seq;
++ MULTI_update_va_mapping(per_cpu(pb_mcl, cpu) + seq,
++ (unsigned long)__va(pfn << PAGE_SHIFT),
++ pfn_pte(pfn, flags), 0);
++ if (unlikely(++seq == PIN_BATCH)) {
++ if (unlikely(HYPERVISOR_multicall_check(per_cpu(pb_mcl, cpu),
++ PIN_BATCH, NULL)))
++ BUG();
++ seq = 0;
+ }
+
+ return seq;
+@@ -253,6 +253,16 @@ static void pgd_walk(pgd_t *pgd_base, pg
+ }
+ }
+
++#ifdef CONFIG_X86_PAE
++ for (; g < PTRS_PER_PGD; g++, pgd++) {
++ BUG_ON(pgd_none(*pgd));
++ pud = pud_offset(pgd, 0);
++ BUG_ON(pud_none(*pud));
++ pmd = pmd_offset(pud, 0);
++ seq = pgd_walk_set_prot(virt_to_page(pmd),flags,cpu,seq);
++ }
++#endif
++
+ mcl = per_cpu(pb_mcl, cpu);
+ #ifdef CONFIG_X86_64
+ if (unlikely(seq > PIN_BATCH - 2)) {
+@@ -288,6 +298,51 @@ static void pgd_walk(pgd_t *pgd_base, pg
+ put_cpu();
+ }
+
++void __init xen_init_pgd_pin(void)
++{
++ pgd_t *pgd = init_mm.pgd;
++ pud_t *pud;
++ pmd_t *pmd;
++ unsigned int g, u, m;
++
++ if (xen_feature(XENFEAT_auto_translated_physmap))
++ return;
++
++ SetPagePinned(virt_to_page(pgd));
++ for (g = 0; g < PTRS_PER_PGD; g++, pgd++) {
++#ifndef CONFIG_X86_PAE
++ if (g >= pgd_index(HYPERVISOR_VIRT_START)
++ && g <= pgd_index(HYPERVISOR_VIRT_END - 1))
++ continue;
++#endif
++ if (!pgd_present(*pgd))
++ continue;
++ pud = pud_offset(pgd, 0);
++ if (PTRS_PER_PUD > 1) /* not folded */
++ SetPagePinned(virt_to_page(pud));
++ for (u = 0; u < PTRS_PER_PUD; u++, pud++) {
++ if (!pud_present(*pud))
++ continue;
++ pmd = pmd_offset(pud, 0);
++ if (PTRS_PER_PMD > 1) /* not folded */
++ SetPagePinned(virt_to_page(pmd));
++ for (m = 0; m < PTRS_PER_PMD; m++, pmd++) {
++#ifdef CONFIG_X86_PAE
++ if (g == pgd_index(HYPERVISOR_VIRT_START)
++ && m >= pmd_index(HYPERVISOR_VIRT_START))
++ continue;
++#endif
++ if (!pmd_present(*pmd))
++ continue;
++ SetPagePinned(pmd_page(*pmd));
++ }
++ }
++ }
++#ifdef CONFIG_X86_64
++ SetPagePinned(virt_to_page(level3_user_pgt));
++#endif
++}
++
+ static void __pgd_pin(pgd_t *pgd)
+ {
+ pgd_walk(pgd, PAGE_KERNEL_RO);
+@@ -480,21 +535,18 @@ static void pgd_dtor(void *pgd)
+
+ void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd)
+ {
+- struct page *page = virt_to_page(pmd);
+- unsigned long pfn = page_to_pfn(page);
+-
+- paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
+-
+ /* Note: almost everything apart from _PAGE_PRESENT is
+ reserved at the pmd (PDPT) level. */
+- if (PagePinned(virt_to_page(mm->pgd))) {
+- BUG_ON(PageHighMem(page));
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)__va(pfn << PAGE_SHIFT),
+- pfn_pte(pfn, PAGE_KERNEL_RO), 0));
+- set_pud(pudp, __pud(__pa(pmd) | _PAGE_PRESENT));
+- } else
+- *pudp = __pud(__pa(pmd) | _PAGE_PRESENT);
++ pud_t pud = __pud(__pa(pmd) | _PAGE_PRESENT);
++
++ paravirt_alloc_pmd(mm, page_to_pfn(virt_to_page(pmd)));
++
++ if (likely(!PagePinned(virt_to_page(pudp)))) {
++ *pudp = pud;
++ return;
++ }
++
++ set_pud(pudp, pud);
+
+ /*
+ * According to Intel App note "TLBs, Paging-Structure Caches,
+@@ -585,13 +637,10 @@ static void pgd_prepopulate_pmd(struct m
+ i++, pud++, addr += PUD_SIZE) {
+ pmd_t *pmd = pmds[i];
+
+- if (i >= KERNEL_PGD_BOUNDARY) {
++ if (i >= KERNEL_PGD_BOUNDARY)
+ memcpy(pmd,
+ (pmd_t *)pgd_page_vaddr(swapper_pg_dir[i]),
+ sizeof(pmd_t) * PTRS_PER_PMD);
+- make_lowmem_page_readonly(
+- pmd, XENFEAT_writable_page_tables);
+- }
+
+ /* It is safe to poke machine addresses of pmds under the pgd_lock. */
+ pud_populate(mm, pud, pmd);
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 12:07:29.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 12:13:06.000000000 +0100
+@@ -94,10 +94,12 @@ void xen_invlpg(unsigned long ptr);
+ void xen_l1_entry_update(pte_t *ptr, pte_t val);
+ void xen_l2_entry_update(pmd_t *ptr, pmd_t val);
+ void xen_l3_entry_update(pud_t *ptr, pud_t val); /* x86_64/PAE */
+-void xen_l4_entry_update(pgd_t *ptr, pgd_t val); /* x86_64 only */
++void xen_l4_entry_update(pgd_t *ptr, int user, pgd_t val); /* x86_64 only */
+ void xen_pgd_pin(unsigned long ptr);
+ void xen_pgd_unpin(unsigned long ptr);
+
++void xen_init_pgd_pin(void);
++
+ void xen_set_ldt(const void *ptr, unsigned int ents);
+
+ #ifdef CONFIG_SMP
+@@ -323,6 +325,18 @@ MULTI_update_va_mapping(
+ }
+
+ static inline void
++MULTI_mmu_update(multicall_entry_t *mcl, mmu_update_t *req,
++ unsigned int count, unsigned int *success_count,
++ domid_t domid)
++{
++ mcl->op = __HYPERVISOR_mmu_update;
++ mcl->args[0] = (unsigned long)req;
++ mcl->args[1] = count;
++ mcl->args[2] = (unsigned long)success_count;
++ mcl->args[3] = domid;
++}
++
++static inline void
+ MULTI_grant_table_op(multicall_entry_t *mcl, unsigned int cmd,
+ void *uop, unsigned int count)
+ {
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgalloc.h 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc.h 2008-12-01 12:13:06.000000000 +0100
+@@ -64,20 +64,16 @@ static inline void pmd_populate(struct m
+ struct page *pte)
+ {
+ unsigned long pfn = page_to_pfn(pte);
++ pmd_t ent = __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE);
+
+ paravirt_alloc_pte(mm, pfn);
+- if (PagePinned(virt_to_page(mm->pgd))) {
+- if (!PageHighMem(pte))
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)__va(pfn << PAGE_SHIFT),
+- pfn_pte(pfn, PAGE_KERNEL_RO), 0));
+-#ifndef CONFIG_X86_64
+- else if (!TestSetPagePinned(pte))
+- kmap_flush_unused();
++ if (PagePinned(virt_to_page(pmd))) {
++#ifndef CONFIG_HIGHPTE
++ BUG_ON(PageHighMem(pte));
+ #endif
+- set_pmd(pmd, __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
++ set_pmd(pmd, ent);
+ } else
+- *pmd = __pmd(((pmdval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE);
++ *pmd = ent;
+ }
+
+ #define pmd_pgtable(pmd) pmd_page(pmd)
+@@ -99,39 +95,28 @@ extern void pud_populate(struct mm_struc
+ #else /* !CONFIG_X86_PAE */
+ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+ {
++ pud_t ent = __pud(_PAGE_TABLE | __pa(pmd));
++
+ paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
+- if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)pmd,
+- pfn_pte(virt_to_phys(pmd)>>PAGE_SHIFT,
+- PAGE_KERNEL_RO), 0));
+- set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
+- } else
+- *pud = __pud(_PAGE_TABLE | __pa(pmd));
++ if (PagePinned(virt_to_page(pud)))
++ set_pud(pud, ent);
++ else
++ *pud = ent;
+ }
+ #endif /* CONFIG_X86_PAE */
+
+ #if PAGETABLE_LEVELS > 3
+ #define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
+
+-/*
+- * We need to use the batch mode here, but pgd_pupulate() won't be
+- * be called frequently.
+- */
+ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
+ {
++ pgd_t ent = __pgd(_PAGE_TABLE | __pa(pud));
++
+ paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
+- if (unlikely(PagePinned(virt_to_page((mm)->pgd)))) {
+- BUG_ON(HYPERVISOR_update_va_mapping(
+- (unsigned long)pud,
+- pfn_pte(virt_to_phys(pud)>>PAGE_SHIFT,
+- PAGE_KERNEL_RO), 0));
+- set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
+- set_pgd(__user_pgd(pgd), __pgd(_PAGE_TABLE | __pa(pud)));
+- } else {
+- *(pgd) = __pgd(_PAGE_TABLE | __pa(pud));
+- *__user_pgd(pgd) = *(pgd);
+- }
++ if (unlikely(PagePinned(virt_to_page(pgd))))
++ xen_l4_entry_update(pgd, 1, ent);
++ else
++ *__user_pgd(pgd) = *pgd = ent;
+ }
+
+ static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable-3level.h 2008-12-01 12:13:06.000000000 +0100
+@@ -76,12 +76,15 @@ static inline void __xen_pte_clear(pte_t
+ ptep->pte_high = 0;
+ }
+
+-static inline void xen_pmd_clear(pmd_t *pmd)
+-{
+- xen_l2_entry_update(pmd, __pmd(0));
+-}
++#define xen_pmd_clear(pmd) \
++({ \
++ pmd_t *__pmdp = (pmd); \
++ PagePinned(virt_to_page(__pmdp)) \
++ ? set_pmd(__pmdp, __pmd(0)) \
++ : (void)(*__pmdp = __pmd(0)); \
++})
+
+-static inline void pud_clear(pud_t *pudp)
++static inline void __xen_pud_clear(pud_t *pudp)
+ {
+ pgdval_t pgd;
+
+@@ -102,13 +105,21 @@ static inline void pud_clear(pud_t *pudp
+ xen_tlb_flush();
+ }
+
+-#define pud_page(pud) ((struct page *) __va(pud_val(pud) & PTE_PFN_MASK))
++#define xen_pud_clear(pudp) \
++({ \
++ pud_t *__pudp = (pudp); \
++ PagePinned(virt_to_page(__pudp)) \
++ ? __xen_pud_clear(__pudp) \
++ : (void)(*__pudp = __pud(0)); \
++})
++
++#define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT)
+
+ #define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PTE_PFN_MASK))
+
+
+ /* Find an entry in the second-level page table.. */
+-#define pmd_offset(pud, address) ((pmd_t *)pud_page(*(pud)) + \
++#define pmd_offset(pud, address) ((pmd_t *)pud_page_vaddr(*(pud)) + \
+ pmd_index(address))
+
+ #ifdef CONFIG_SMP
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 12:13:06.000000000 +0100
+@@ -110,33 +110,41 @@ static inline void xen_set_pmd(pmd_t *pm
+ xen_l2_entry_update(pmdp, pmd);
+ }
+
+-static inline void xen_pmd_clear(pmd_t *pmd)
+-{
+- xen_set_pmd(pmd, xen_make_pmd(0));
+-}
++#define xen_pmd_clear(pmd) \
++({ \
++ pmd_t *__pmdp = (pmd); \
++ PagePinned(virt_to_page(__pmdp)) \
++ ? set_pmd(__pmdp, xen_make_pmd(0)) \
++ : (void)(*__pmdp = xen_make_pmd(0)); \
++})
+
+ static inline void xen_set_pud(pud_t *pudp, pud_t pud)
+ {
+ xen_l3_entry_update(pudp, pud);
+ }
+
+-static inline void xen_pud_clear(pud_t *pud)
+-{
+- xen_set_pud(pud, xen_make_pud(0));
+-}
++#define xen_pud_clear(pud) \
++({ \
++ pud_t *__pudp = (pud); \
++ PagePinned(virt_to_page(__pudp)) \
++ ? set_pud(__pudp, xen_make_pud(0)) \
++ : (void)(*__pudp = xen_make_pud(0)); \
++})
+
+ #define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
+
+ static inline void xen_set_pgd(pgd_t *pgdp, pgd_t pgd)
+ {
+- xen_l4_entry_update(pgdp, pgd);
++ xen_l4_entry_update(pgdp, 0, pgd);
+ }
+
+-static inline void xen_pgd_clear(pgd_t *pgd)
+-{
+- xen_set_pgd(pgd, xen_make_pgd(0));
+- xen_set_pgd(__user_pgd(pgd), xen_make_pgd(0));
+-}
++#define xen_pgd_clear(pgd) \
++({ \
++ pgd_t *__pgdp = (pgd); \
++ PagePinned(virt_to_page(__pgdp)) \
++ ? xen_l4_entry_update(__pgdp, 1, xen_make_pgd(0)) \
++ : (void)(*__user_pgd(__pgdp) = *__pgdp = xen_make_pgd(0)); \
++})
+
+ #define pte_same(a, b) ((a).pte == (b).pte)
+
--- /dev/null
+From: jbeulich@novell.com
+Subject: fix issues with the assignment of huge amounts of memory
+Patch-mainline: obsolete
+
+At the same time remove the non-applicable and broken support for the
+memmap= command line option.
+Also fix the overlap of the modules area with the fixmaps on x86-64.
+
+Index: head-2008-11-25/arch/x86/kernel/e820-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/e820-xen.c 2008-11-27 10:20:43.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/e820-xen.c 2008-11-25 13:18:07.000000000 +0100
+@@ -1235,6 +1235,26 @@ static int __init parse_memopt(char *p)
+
+ i = e820.nr_map - 1;
+ current_end = e820.map[i].addr + e820.map[i].size;
++
++ /*
++ * A little less than 2% of available memory are needed for page
++ * tables, p2m map, and mem_map. Hence the maximum amount of memory
++ * we can potentially balloon up to can in no case exceed about 50
++ * times of what we've been given initially. Since even with that we
++ * won't be able to boot (due to various calculations done based on
++ * the total number of pages) we further restrict this to factor 32.
++ */
++ if ((mem_size >> (PAGE_SHIFT + 5)) > xen_start_info->nr_pages) {
++ u64 size = (u64)xen_start_info->nr_pages << 5;
++
++ printk(KERN_WARNING "mem=%Luk is invalid for an initial"
++ " allocation of %luk, using %Luk\n",
++ (unsigned long long)mem_size >> 10,
++ xen_start_info->nr_pages << (PAGE_SHIFT - 10),
++ (unsigned long long)size << (PAGE_SHIFT - 10));
++ mem_size = size << PAGE_SHIFT;
++ }
++
+ if (current_end < mem_size) {
+ /*
+ * The e820 map ends before our requested size so
+@@ -1294,6 +1314,7 @@ static int __init parse_memmap_opt(char
+ return *p == '\0' ? 0 : -EINVAL;
+ }
+ early_param("memmap", parse_memmap_opt);
++#endif
+
+ void __init finish_e820_parsing(void)
+ {
+@@ -1308,7 +1329,6 @@ void __init finish_e820_parsing(void)
+ e820_print_map("user");
+ }
+ }
+-#endif
+
+ static inline const char *e820_type_to_string(int e820_type)
+ {
+Index: head-2008-11-25/arch/x86/kernel/setup-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/setup-xen.c 2008-11-17 13:58:02.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/setup-xen.c 2008-11-27 10:26:10.000000000 +0100
+@@ -128,12 +128,7 @@ static struct notifier_block xen_panic_b
+ unsigned long *phys_to_machine_mapping;
+ EXPORT_SYMBOL(phys_to_machine_mapping);
+
+-unsigned long *pfn_to_mfn_frame_list_list,
+-#ifdef CONFIG_X86_64
+- *pfn_to_mfn_frame_list[512];
+-#else
+- *pfn_to_mfn_frame_list[128];
+-#endif
++unsigned long *pfn_to_mfn_frame_list_list, **pfn_to_mfn_frame_list;
+
+ /* Raw start-of-day parameters from the hypervisor. */
+ start_info_t *xen_start_info;
+@@ -1055,17 +1050,17 @@ void __init setup_arch(char **cmdline_p)
+ p2m_pages = xen_start_info->nr_pages;
+
+ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+- unsigned long i, j;
++ unsigned long i, j, size;
+ unsigned int k, fpp;
+
+ /* Make sure we have a large enough P->M table. */
+ phys_to_machine_mapping = alloc_bootmem_pages(
+ max_pfn * sizeof(unsigned long));
+- memset(phys_to_machine_mapping, ~0,
+- max_pfn * sizeof(unsigned long));
+ memcpy(phys_to_machine_mapping,
+ (unsigned long *)xen_start_info->mfn_list,
+ p2m_pages * sizeof(unsigned long));
++ memset(phys_to_machine_mapping + p2m_pages, ~0,
++ (max_pfn - p2m_pages) * sizeof(unsigned long));
+ free_bootmem(
+ __pa(xen_start_info->mfn_list),
+ PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
+@@ -1075,15 +1070,26 @@ void __init setup_arch(char **cmdline_p)
+ * Initialise the list of the frames that specify the list of
+ * frames that make up the p2m table. Used by save/restore.
+ */
+- pfn_to_mfn_frame_list_list = alloc_bootmem_pages(PAGE_SIZE);
+-
+ fpp = PAGE_SIZE/sizeof(unsigned long);
++ size = (max_pfn + fpp - 1) / fpp;
++ size = (size + fpp - 1) / fpp;
++ ++size; /* include a zero terminator for crash tools */
++ size *= sizeof(unsigned long);
++ pfn_to_mfn_frame_list_list = alloc_bootmem_pages(size);
++ if (size > PAGE_SIZE
++ && xen_create_contiguous_region((unsigned long)
++ pfn_to_mfn_frame_list_list,
++ get_order(size), 0))
++ BUG();
++ size -= sizeof(unsigned long);
++ pfn_to_mfn_frame_list = alloc_bootmem(size);
++
+ for (i = j = 0, k = -1; i < max_pfn; i += fpp, j++) {
+ if (j == fpp)
+ j = 0;
+ if (j == 0) {
+ k++;
+- BUG_ON(k>=ARRAY_SIZE(pfn_to_mfn_frame_list));
++ BUG_ON(k * sizeof(unsigned long) >= size);
+ pfn_to_mfn_frame_list[k] =
+ alloc_bootmem_pages(PAGE_SIZE);
+ pfn_to_mfn_frame_list_list[k] =
+Index: head-2008-11-25/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/mm/init_64-xen.c 2008-11-17 13:58:22.000000000 +0100
++++ head-2008-11-25/arch/x86/mm/init_64-xen.c 2008-11-25 13:18:07.000000000 +0100
+@@ -660,6 +660,13 @@ static void __init extend_init_mapping(u
+ while (va < (__START_KERNEL_map
+ + (table_cur << PAGE_SHIFT)
+ + tables_space)) {
++ if (!pmd_index(va) && !pte_index(va)) {
++ page = (unsigned long *)init_level4_pgt;
++ addr = page[pgd_index(va)];
++ addr_to_page(addr, page);
++ addr = page[pud_index(va)];
++ addr_to_page(addr, page);
++ }
+ pmd = (pmd_t *)&page[pmd_index(va)];
+ if (pmd_none(*pmd)) {
+ pte_page = alloc_static_page(&phys);
+Index: head-2008-11-25/drivers/xen/core/machine_reboot.c
+===================================================================
+--- head-2008-11-25.orig/drivers/xen/core/machine_reboot.c 2008-11-18 18:17:30.000000000 +0100
++++ head-2008-11-25/drivers/xen/core/machine_reboot.c 2008-11-25 13:18:07.000000000 +0100
+@@ -84,7 +84,7 @@ static void post_suspend(int suspend_can
+ unsigned long shinfo_mfn;
+ extern unsigned long max_pfn;
+ extern unsigned long *pfn_to_mfn_frame_list_list;
+- extern unsigned long *pfn_to_mfn_frame_list[];
++ extern unsigned long **pfn_to_mfn_frame_list;
+
+ if (suspend_cancelled) {
+ xen_start_info->store_mfn =
+Index: head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-11-25.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-11-18 17:46:21.000000000 +0100
++++ head-2008-11-25/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-11-25 13:18:07.000000000 +0100
+@@ -158,7 +158,7 @@ static inline void xen_set_pgd(pgd_t *pg
+ #define PGDIR_MASK (~(PGDIR_SIZE - 1))
+
+
+-#define MAXMEM _AC(0x00003fffffffffff, UL)
++#define MAXMEM _AC(0x000000dfffffffff, UL)
+ #define VMALLOC_START _AC(0xffffc20000000000, UL)
+ #define VMALLOC_END _AC(0xffffe1ffffffffff, UL)
+ #define VMEMMAP_START _AC(0xffffe20000000000, UL)
--- /dev/null
+From: jbeulich@novell.com
+Subject: properly predict phys<->mach translations
+Patch-mainline: obsolete
+
+Index: head-2008-11-04/include/asm-x86/mach-xen/asm/maddr_32.h
+===================================================================
+--- head-2008-11-04.orig/include/asm-x86/mach-xen/asm/maddr_32.h 2008-11-04 11:54:55.000000000 +0100
++++ head-2008-11-04/include/asm-x86/mach-xen/asm/maddr_32.h 2008-10-17 12:45:23.000000000 +0200
+@@ -30,17 +30,19 @@ extern unsigned int machine_to_phys_or
+
+ static inline unsigned long pfn_to_mfn(unsigned long pfn)
+ {
+- if (xen_feature(XENFEAT_auto_translated_physmap))
++ if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))
+ return pfn;
+- BUG_ON(max_mapnr && pfn >= max_mapnr);
++ if (likely(max_mapnr))
++ BUG_ON(pfn >= max_mapnr);
+ return phys_to_machine_mapping[pfn] & ~FOREIGN_FRAME_BIT;
+ }
+
+ static inline int phys_to_machine_mapping_valid(unsigned long pfn)
+ {
+- if (xen_feature(XENFEAT_auto_translated_physmap))
++ if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))
+ return 1;
+- BUG_ON(max_mapnr && pfn >= max_mapnr);
++ if (likely(max_mapnr))
++ BUG_ON(pfn >= max_mapnr);
+ return (phys_to_machine_mapping[pfn] != INVALID_P2M_ENTRY);
+ }
+
+@@ -48,7 +50,7 @@ static inline unsigned long mfn_to_pfn(u
+ {
+ unsigned long pfn;
+
+- if (xen_feature(XENFEAT_auto_translated_physmap))
++ if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))
+ return mfn;
+
+ if (unlikely((mfn >> machine_to_phys_order) != 0))
+@@ -95,17 +97,18 @@ static inline unsigned long mfn_to_pfn(u
+ static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
+ {
+ unsigned long pfn = mfn_to_pfn(mfn);
+- if ((pfn < max_mapnr)
+- && !xen_feature(XENFEAT_auto_translated_physmap)
+- && (phys_to_machine_mapping[pfn] != mfn))
++ if (likely(pfn < max_mapnr)
++ && likely(!xen_feature(XENFEAT_auto_translated_physmap))
++ && unlikely(phys_to_machine_mapping[pfn] != mfn))
+ return max_mapnr; /* force !pfn_valid() */
+ return pfn;
+ }
+
+ static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
+ {
+- BUG_ON(max_mapnr && pfn >= max_mapnr);
+- if (xen_feature(XENFEAT_auto_translated_physmap)) {
++ if (likely(max_mapnr))
++ BUG_ON(pfn >= max_mapnr);
++ if (unlikely(xen_feature(XENFEAT_auto_translated_physmap))) {
+ BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY);
+ return;
+ }
+Index: head-2008-11-04/include/asm-x86/mach-xen/asm/maddr_64.h
+===================================================================
+--- head-2008-11-04.orig/include/asm-x86/mach-xen/asm/maddr_64.h 2008-11-04 11:54:55.000000000 +0100
++++ head-2008-11-04/include/asm-x86/mach-xen/asm/maddr_64.h 2008-10-17 12:46:35.000000000 +0200
+@@ -25,17 +25,19 @@ extern unsigned int machine_to_phys_or
+
+ static inline unsigned long pfn_to_mfn(unsigned long pfn)
+ {
+- if (xen_feature(XENFEAT_auto_translated_physmap))
++ if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))
+ return pfn;
+- BUG_ON(max_mapnr && pfn >= max_mapnr);
++ if (likely(max_mapnr))
++ BUG_ON(pfn >= max_mapnr);
+ return phys_to_machine_mapping[pfn] & ~FOREIGN_FRAME_BIT;
+ }
+
+ static inline int phys_to_machine_mapping_valid(unsigned long pfn)
+ {
+- if (xen_feature(XENFEAT_auto_translated_physmap))
++ if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))
+ return 1;
+- BUG_ON(max_mapnr && pfn >= max_mapnr);
++ if (likely(max_mapnr))
++ BUG_ON(pfn >= max_mapnr);
+ return (phys_to_machine_mapping[pfn] != INVALID_P2M_ENTRY);
+ }
+
+@@ -43,7 +45,7 @@ static inline unsigned long mfn_to_pfn(u
+ {
+ unsigned long pfn;
+
+- if (xen_feature(XENFEAT_auto_translated_physmap))
++ if (unlikely(xen_feature(XENFEAT_auto_translated_physmap)))
+ return mfn;
+
+ if (unlikely((mfn >> machine_to_phys_order) != 0))
+@@ -90,17 +92,18 @@ static inline unsigned long mfn_to_pfn(u
+ static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
+ {
+ unsigned long pfn = mfn_to_pfn(mfn);
+- if ((pfn < max_mapnr)
+- && !xen_feature(XENFEAT_auto_translated_physmap)
+- && (phys_to_machine_mapping[pfn] != mfn))
++ if (likely(pfn < max_mapnr)
++ && likely(!xen_feature(XENFEAT_auto_translated_physmap))
++ && unlikely(phys_to_machine_mapping[pfn] != mfn))
+ return max_mapnr; /* force !pfn_valid() */
+ return pfn;
+ }
+
+ static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
+ {
+- BUG_ON(max_mapnr && pfn >= max_mapnr);
+- if (xen_feature(XENFEAT_auto_translated_physmap)) {
++ if (likely(max_mapnr))
++ BUG_ON(pfn >= max_mapnr);
++ if (unlikely(xen_feature(XENFEAT_auto_translated_physmap))) {
+ BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY);
+ return;
+ }
+Index: head-2008-11-04/include/asm-x86/mach-xen/asm/page.h
+===================================================================
+--- head-2008-11-04.orig/include/asm-x86/mach-xen/asm/page.h 2008-11-04 11:55:22.000000000 +0100
++++ head-2008-11-04/include/asm-x86/mach-xen/asm/page.h 2008-10-17 12:53:40.000000000 +0200
+@@ -102,7 +102,7 @@ static inline void copy_user_page(void *
+ #define __pgd_ma(x) ((pgd_t) { (x) } )
+ static inline pgd_t xen_make_pgd(pgdval_t val)
+ {
+- if (val & _PAGE_PRESENT)
++ if (likely(val & _PAGE_PRESENT))
+ val = pte_phys_to_machine(val);
+ return (pgd_t) { val };
+ }
+@@ -112,10 +112,10 @@ static inline pgdval_t xen_pgd_val(pgd_t
+ {
+ pgdval_t ret = __pgd_val(pgd);
+ #if PAGETABLE_LEVELS == 2 && CONFIG_XEN_COMPAT <= 0x030002
+- if (ret)
++ if (likely(ret))
+ ret = machine_to_phys(ret) | _PAGE_PRESENT;
+ #else
+- if (ret & _PAGE_PRESENT)
++ if (likely(ret & _PAGE_PRESENT))
+ ret = pte_machine_to_phys(ret);
+ #endif
+ return ret;
+@@ -128,7 +128,7 @@ typedef struct { pudval_t pud; } pud_t;
+ #define __pud_ma(x) ((pud_t) { (x) } )
+ static inline pud_t xen_make_pud(pudval_t val)
+ {
+- if (val & _PAGE_PRESENT)
++ if (likely(val & _PAGE_PRESENT))
+ val = pte_phys_to_machine(val);
+ return (pud_t) { val };
+ }
+@@ -137,7 +137,7 @@ static inline pud_t xen_make_pud(pudval_
+ static inline pudval_t xen_pud_val(pud_t pud)
+ {
+ pudval_t ret = __pud_val(pud);
+- if (ret & _PAGE_PRESENT)
++ if (likely(ret & _PAGE_PRESENT))
+ ret = pte_machine_to_phys(ret);
+ return ret;
+ }
+@@ -156,7 +156,7 @@ typedef struct { pmdval_t pmd; } pmd_t;
+ #define __pmd_ma(x) ((pmd_t) { (x) } )
+ static inline pmd_t xen_make_pmd(pmdval_t val)
+ {
+- if (val & _PAGE_PRESENT)
++ if (likely(val & _PAGE_PRESENT))
+ val = pte_phys_to_machine(val);
+ return (pmd_t) { val };
+ }
+@@ -166,10 +166,10 @@ static inline pmdval_t xen_pmd_val(pmd_t
+ {
+ pmdval_t ret = __pmd_val(pmd);
+ #if CONFIG_XEN_COMPAT <= 0x030002
+- if (ret)
++ if (likely(ret))
+ ret = pte_machine_to_phys(ret) | _PAGE_PRESENT;
+ #else
+- if (ret & _PAGE_PRESENT)
++ if (likely(ret & _PAGE_PRESENT))
+ ret = pte_machine_to_phys(ret);
+ #endif
+ return ret;
+@@ -188,7 +188,7 @@ static inline pmdval_t xen_pmd_val(pmd_t
+ #define __pte_ma(x) ((pte_t) { .pte = (x) } )
+ static inline pte_t xen_make_pte(pteval_t val)
+ {
+- if ((val & (_PAGE_PRESENT|_PAGE_IO)) == _PAGE_PRESENT)
++ if (likely((val & (_PAGE_PRESENT|_PAGE_IO)) == _PAGE_PRESENT))
+ val = pte_phys_to_machine(val);
+ return (pte_t) { .pte = val };
+ }
+@@ -197,7 +197,7 @@ static inline pte_t xen_make_pte(pteval_
+ static inline pteval_t xen_pte_val(pte_t pte)
+ {
+ pteval_t ret = __pte_val(pte);
+- if ((pte.pte_low & (_PAGE_PRESENT|_PAGE_IO)) == _PAGE_PRESENT)
++ if (likely((pte.pte_low & (_PAGE_PRESENT|_PAGE_IO)) == _PAGE_PRESENT))
+ ret = pte_machine_to_phys(ret);
+ return ret;
+ }
--- /dev/null
+From: jbeulich@novell.com
+Subject: ensure inadvertent uses of lazy TLB data are caught during the build
+Patch-mainline: obsolete
+
+Index: head-2008-11-17/arch/x86/kernel/cpu/common_64-xen.c
+===================================================================
+--- head-2008-11-17.orig/arch/x86/kernel/cpu/common_64-xen.c 2008-11-17 14:06:21.000000000 +0100
++++ head-2008-11-17/arch/x86/kernel/cpu/common_64-xen.c 2008-11-17 14:07:10.000000000 +0100
+@@ -557,8 +557,10 @@ void pda_init(int cpu)
+ pda->irqcount = -1;
+ pda->kernelstack = (unsigned long)stack_thread_info() -
+ PDA_STACKOFFSET + THREAD_SIZE;
++#ifndef CONFIG_XEN
+ pda->active_mm = &init_mm;
+ pda->mmu_state = 0;
++#endif
+
+ if (cpu == 0) {
+ /* others are initialized in smpboot.c */
+Index: head-2008-11-17/include/asm-x86/mach-xen/asm/tlbflush.h
+===================================================================
+--- head-2008-11-17.orig/include/asm-x86/mach-xen/asm/tlbflush.h 2008-11-17 13:41:59.000000000 +0100
++++ head-2008-11-17/include/asm-x86/mach-xen/asm/tlbflush.h 2008-11-17 14:07:10.000000000 +0100
+@@ -82,6 +82,7 @@ static inline void flush_tlb_range(struc
+ flush_tlb_mm(vma->vm_mm);
+ }
+
++#ifndef CONFIG_XEN
+ #define TLBSTATE_OK 1
+ #define TLBSTATE_LAZY 2
+
+@@ -93,6 +94,7 @@ struct tlb_state {
+ };
+ DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
+ #endif
++#endif
+
+ #endif /* SMP */
+
+Index: head-2008-11-17/include/asm-x86/pda.h
+===================================================================
+--- head-2008-11-17.orig/include/asm-x86/pda.h 2008-11-17 13:15:55.000000000 +0100
++++ head-2008-11-17/include/asm-x86/pda.h 2008-11-17 14:07:10.000000000 +0100
+@@ -26,9 +26,13 @@ struct x8664_pda {
+ short in_bootmem; /* pda lives in bootmem */
+ unsigned int __softirq_pending;
+ unsigned int __nmi_count; /* number of NMI on this CPUs */
++#ifndef CONFIG_XEN
+ short mmu_state;
+ short isidle;
+ struct mm_struct *active_mm;
++#else
++ short isidle;
++#endif
+ unsigned apic_timer_irqs;
+ unsigned irq0_irqs;
+ unsigned irq_resched_count;
--- /dev/null
+Subject: be more aggressive about de-activating mm-s under destruction
+From: jbeulich@novell.com
+Patch-mainline: obsolete
+
+... by not only handling the current task on the CPU arch_exit_mmap()
+gets executed on, but also forcing remote CPUs to do so.
+
+Index: head-2008-12-01/arch/x86/mm/pgtable-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable-xen.c 2008-12-01 12:13:06.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable-xen.c 2008-12-01 12:13:16.000000000 +0100
+@@ -418,27 +418,44 @@ void arch_dup_mmap(struct mm_struct *old
+ mm_pin(mm);
+ }
+
+-void arch_exit_mmap(struct mm_struct *mm)
++/*
++ * We aggressively remove defunct pgd from cr3. We execute unmap_vmas() *much*
++ * faster this way, as no hypercalls are needed for the page table updates.
++ */
++static void leave_active_mm(struct task_struct *tsk, struct mm_struct *mm)
++ __releases(tsk->alloc_lock)
+ {
+- struct task_struct *tsk = current;
+-
+- task_lock(tsk);
+-
+- /*
+- * We aggressively remove defunct pgd from cr3. We execute unmap_vmas()
+- * *much* faster this way, as no tlb flushes means bigger wrpt batches.
+- */
+ if (tsk->active_mm == mm) {
+ tsk->active_mm = &init_mm;
+ atomic_inc(&init_mm.mm_count);
+
+ switch_mm(mm, &init_mm, tsk);
+
+- atomic_dec(&mm->mm_count);
+- BUG_ON(atomic_read(&mm->mm_count) == 0);
++ if (atomic_dec_and_test(&mm->mm_count))
++ BUG();
+ }
+
+ task_unlock(tsk);
++}
++
++static void _leave_active_mm(void *mm)
++{
++ struct task_struct *tsk = current;
++
++ if (spin_trylock(&tsk->alloc_lock))
++ leave_active_mm(tsk, mm);
++}
++
++void arch_exit_mmap(struct mm_struct *mm)
++{
++ struct task_struct *tsk = current;
++
++ task_lock(tsk);
++ leave_active_mm(tsk, mm);
++
++ preempt_disable();
++ smp_call_function_mask(mm->cpu_vm_mask, _leave_active_mm, mm, 1);
++ preempt_enable();
+
+ if (PagePinned(virt_to_page(mm->pgd))
+ && atomic_read(&mm->mm_count) == 1
--- /dev/null
+From: jbeulich@novell.com
+Subject: Parse oops=panic (match x86-64)
+Patch-mainline: obsolete
+
+Index: head-2008-11-25/arch/x86/kernel/traps_32-xen.c
+===================================================================
+--- head-2008-11-25.orig/arch/x86/kernel/traps_32-xen.c 2008-11-25 13:17:46.000000000 +0100
++++ head-2008-11-25/arch/x86/kernel/traps_32-xen.c 2008-11-25 13:18:12.000000000 +0100
+@@ -1277,6 +1277,16 @@ void __cpuinit smp_trap_init(trap_info_t
+ }
+ }
+
++static int __init oops_setup(char *s)
++{
++ if (!s)
++ return -EINVAL;
++ if (!strcmp(s, "panic"))
++ panic_on_oops = 1;
++ return 0;
++}
++early_param("oops", oops_setup);
++
+ static int __init kstack_setup(char *s)
+ {
+ kstack_depth_to_print = simple_strtoul(s, NULL, 0);
--- /dev/null
+From: jbeulich@novell.com
+Subject: make pinning of pgd pairs transparent to callers
+Patch-mainline: obsolete
+
+Index: head-2008-12-01/arch/x86/mm/hypervisor.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/hypervisor.c 2008-12-01 12:13:06.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/hypervisor.c 2008-12-01 12:13:22.000000000 +0100
+@@ -517,26 +517,38 @@ void xen_invlpg_mask(cpumask_t *mask, un
+
+ #endif /* CONFIG_SMP */
+
+-void xen_pgd_pin(unsigned long ptr)
+-{
+- struct mmuext_op op;
+ #ifdef CONFIG_X86_64
+- op.cmd = MMUEXT_PIN_L4_TABLE;
+-#elif defined(CONFIG_X86_PAE)
+- op.cmd = MMUEXT_PIN_L3_TABLE;
++#define NR_PGD_PIN_OPS 2
+ #else
+- op.cmd = MMUEXT_PIN_L2_TABLE;
++#define NR_PGD_PIN_OPS 1
+ #endif
+- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
+- BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++
++void xen_pgd_pin(pgd_t *pgd)
++{
++ struct mmuext_op op[NR_PGD_PIN_OPS];
++
++ op[0].cmd = MMUEXT_PIN_L3_TABLE;
++ op[0].arg1.mfn = pfn_to_mfn(__pa(pgd) >> PAGE_SHIFT);
++#ifdef CONFIG_X86_64
++ op[1].cmd = op[0].cmd = MMUEXT_PIN_L4_TABLE;
++ op[1].arg1.mfn = pfn_to_mfn(__pa(__user_pgd(pgd)) >> PAGE_SHIFT);
++#endif
++ if (HYPERVISOR_mmuext_op(op, NR_PGD_PIN_OPS, NULL, DOMID_SELF) < 0)
++ BUG();
+ }
+
+-void xen_pgd_unpin(unsigned long ptr)
++void xen_pgd_unpin(pgd_t *pgd)
+ {
+- struct mmuext_op op;
+- op.cmd = MMUEXT_UNPIN_TABLE;
+- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
+- BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
++ struct mmuext_op op[NR_PGD_PIN_OPS];
++
++ op[0].cmd = MMUEXT_UNPIN_TABLE;
++ op[0].arg1.mfn = pfn_to_mfn(__pa(pgd) >> PAGE_SHIFT);
++#ifdef CONFIG_X86_64
++ op[1].cmd = MMUEXT_UNPIN_TABLE;
++ op[1].arg1.mfn = pfn_to_mfn(__pa(__user_pgd(pgd)) >> PAGE_SHIFT);
++#endif
++ if (HYPERVISOR_mmuext_op(op, NR_PGD_PIN_OPS, NULL, DOMID_SELF) < 0)
++ BUG();
+ }
+
+ void xen_set_ldt(const void *ptr, unsigned int ents)
+Index: head-2008-12-01/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_64-xen.c 2008-12-01 12:13:13.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_64-xen.c 2008-12-01 12:13:22.000000000 +0100
+@@ -629,10 +629,8 @@ void __init xen_init_pt(void)
+ early_make_page_readonly(level1_fixmap_pgt,
+ XENFEAT_writable_page_tables);
+
+- if (!xen_feature(XENFEAT_writable_page_tables)) {
+- xen_pgd_pin(__pa_symbol(init_level4_pgt));
+- xen_pgd_pin(__pa_symbol(__user_pgd(init_level4_pgt)));
+- }
++ if (!xen_feature(XENFEAT_writable_page_tables))
++ xen_pgd_pin(init_level4_pgt);
+ }
+
+ static void __init extend_init_mapping(unsigned long tables_space)
+Index: head-2008-12-01/arch/x86/mm/pgtable-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable-xen.c 2008-12-01 12:13:16.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable-xen.c 2008-12-01 12:13:22.000000000 +0100
+@@ -347,19 +347,13 @@ static void __pgd_pin(pgd_t *pgd)
+ {
+ pgd_walk(pgd, PAGE_KERNEL_RO);
+ kmap_flush_unused();
+- xen_pgd_pin(__pa(pgd)); /* kernel */
+-#ifdef CONFIG_X86_64
+- xen_pgd_pin(__pa(__user_pgd(pgd))); /* user */
+-#endif
++ xen_pgd_pin(pgd);
+ SetPagePinned(virt_to_page(pgd));
+ }
+
+ static void __pgd_unpin(pgd_t *pgd)
+ {
+- xen_pgd_unpin(__pa(pgd));
+-#ifdef CONFIG_X86_64
+- xen_pgd_unpin(__pa(__user_pgd(pgd)));
+-#endif
++ xen_pgd_unpin(pgd);
+ pgd_walk(pgd, PAGE_KERNEL);
+ ClearPagePinned(virt_to_page(pgd));
+ }
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 12:13:06.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 12:13:22.000000000 +0100
+@@ -95,8 +95,8 @@ void xen_l1_entry_update(pte_t *ptr, pte
+ void xen_l2_entry_update(pmd_t *ptr, pmd_t val);
+ void xen_l3_entry_update(pud_t *ptr, pud_t val); /* x86_64/PAE */
+ void xen_l4_entry_update(pgd_t *ptr, int user, pgd_t val); /* x86_64 only */
+-void xen_pgd_pin(unsigned long ptr);
+-void xen_pgd_unpin(unsigned long ptr);
++void xen_pgd_pin(pgd_t *);
++void xen_pgd_unpin(pgd_t *);
+
+ void xen_init_pgd_pin(void);
+
--- /dev/null
+From: jbeulich@novell.com
+Subject: don't require order-1 allocations for pgd-s
+Patch-mainline: obsolete
+
+At the same time remove the useless user mode pair of init_level4_pgt.
+
+Index: head-2008-12-01/arch/x86/kernel/cpu/common_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/cpu/common_64-xen.c 2008-12-01 12:13:15.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/cpu/common_64-xen.c 2008-12-01 12:13:27.000000000 +0100
+@@ -530,8 +530,7 @@ static void __init_refok switch_pt(int c
+ #ifdef CONFIG_XEN
+ if (cpu == 0)
+ xen_init_pt();
+- xen_pt_switch(__pa_symbol(init_level4_pgt));
+- xen_new_user_pt(__pa_symbol(__user_pgd(init_level4_pgt)));
++ xen_pt_switch(init_level4_pgt);
+ #endif
+ }
+
+Index: head-2008-12-01/arch/x86/kernel/head_64-xen.S
+===================================================================
+--- head-2008-12-01.orig/arch/x86/kernel/head_64-xen.S 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/arch/x86/kernel/head_64-xen.S 2008-12-01 12:13:27.000000000 +0100
+@@ -44,14 +44,6 @@ ENTRY(name)
+
+ NEXT_PAGE(init_level4_pgt)
+ .fill 512,8,0
+- /*
+- * We update two pgd entries to make kernel and user pgd consistent
+- * at pgd_populate(). It can be used for kernel modules. So we place
+- * this page here for those cases to avoid memory corruption.
+- * We also use this page to establish the initial mapping for the
+- * vsyscall area.
+- */
+- .fill 512,8,0
+
+ NEXT_PAGE(level3_kernel_pgt)
+ .fill 512,8,0
+Index: head-2008-12-01/arch/x86/mm/hypervisor.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/hypervisor.c 2008-12-01 12:13:22.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/hypervisor.c 2008-12-01 12:13:27.000000000 +0100
+@@ -422,7 +422,7 @@ void xen_l3_entry_update(pud_t *ptr, pud
+ #endif
+
+ #ifdef CONFIG_X86_64
+-void xen_l4_entry_update(pgd_t *ptr, int user, pgd_t val)
++void xen_l4_entry_update(pgd_t *ptr, pgd_t val)
+ {
+ mmu_update_t u[2];
+ struct page *page = NULL;
+@@ -435,8 +435,10 @@ void xen_l4_entry_update(pgd_t *ptr, int
+ }
+ u[0].ptr = virt_to_machine(ptr);
+ u[0].val = __pgd_val(val);
+- if (user) {
+- u[1].ptr = virt_to_machine(__user_pgd(ptr));
++ if (((unsigned long)ptr & ~PAGE_MASK)
++ < pgd_index(__HYPERVISOR_VIRT_START) * sizeof(*ptr)
++ && (ptr = __user_pgd(ptr)) != NULL) {
++ u[1].ptr = virt_to_machine(ptr);
+ u[1].val = __pgd_val(val);
+ do_lN_entry_update(u, 2, page);
+ } else
+@@ -444,21 +446,25 @@ void xen_l4_entry_update(pgd_t *ptr, int
+ }
+ #endif /* CONFIG_X86_64 */
+
+-void xen_pt_switch(unsigned long ptr)
++#ifdef CONFIG_X86_64
++void xen_pt_switch(pgd_t *pgd)
+ {
+ struct mmuext_op op;
+ op.cmd = MMUEXT_NEW_BASEPTR;
+- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
++ op.arg1.mfn = pfn_to_mfn(__pa(pgd) >> PAGE_SHIFT);
+ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
+ }
+
+-void xen_new_user_pt(unsigned long ptr)
++void xen_new_user_pt(pgd_t *pgd)
+ {
+ struct mmuext_op op;
++
++ pgd = __user_pgd(pgd);
+ op.cmd = MMUEXT_NEW_USER_BASEPTR;
+- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
++ op.arg1.mfn = pgd ? pfn_to_mfn(__pa(pgd) >> PAGE_SHIFT) : 0;
+ BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
+ }
++#endif
+
+ void xen_tlb_flush(void)
+ {
+@@ -526,28 +532,38 @@ void xen_invlpg_mask(cpumask_t *mask, un
+ void xen_pgd_pin(pgd_t *pgd)
+ {
+ struct mmuext_op op[NR_PGD_PIN_OPS];
++ unsigned int nr = NR_PGD_PIN_OPS;
+
+ op[0].cmd = MMUEXT_PIN_L3_TABLE;
+ op[0].arg1.mfn = pfn_to_mfn(__pa(pgd) >> PAGE_SHIFT);
+ #ifdef CONFIG_X86_64
+ op[1].cmd = op[0].cmd = MMUEXT_PIN_L4_TABLE;
+- op[1].arg1.mfn = pfn_to_mfn(__pa(__user_pgd(pgd)) >> PAGE_SHIFT);
++ pgd = __user_pgd(pgd);
++ if (pgd)
++ op[1].arg1.mfn = pfn_to_mfn(__pa(pgd) >> PAGE_SHIFT);
++ else
++ nr = 1;
+ #endif
+- if (HYPERVISOR_mmuext_op(op, NR_PGD_PIN_OPS, NULL, DOMID_SELF) < 0)
++ if (HYPERVISOR_mmuext_op(op, nr, NULL, DOMID_SELF) < 0)
+ BUG();
+ }
+
+ void xen_pgd_unpin(pgd_t *pgd)
+ {
+ struct mmuext_op op[NR_PGD_PIN_OPS];
++ unsigned int nr = NR_PGD_PIN_OPS;
+
+ op[0].cmd = MMUEXT_UNPIN_TABLE;
+ op[0].arg1.mfn = pfn_to_mfn(__pa(pgd) >> PAGE_SHIFT);
+ #ifdef CONFIG_X86_64
+- op[1].cmd = MMUEXT_UNPIN_TABLE;
+- op[1].arg1.mfn = pfn_to_mfn(__pa(__user_pgd(pgd)) >> PAGE_SHIFT);
++ pgd = __user_pgd(pgd);
++ if (pgd) {
++ op[1].cmd = MMUEXT_UNPIN_TABLE;
++ op[1].arg1.mfn = pfn_to_mfn(__pa(pgd) >> PAGE_SHIFT);
++ } else
++ nr = 1;
+ #endif
+- if (HYPERVISOR_mmuext_op(op, NR_PGD_PIN_OPS, NULL, DOMID_SELF) < 0)
++ if (HYPERVISOR_mmuext_op(op, nr, NULL, DOMID_SELF) < 0)
+ BUG();
+ }
+
+Index: head-2008-12-01/arch/x86/mm/init_64-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/init_64-xen.c 2008-12-01 12:13:22.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/init_64-xen.c 2008-12-01 12:13:27.000000000 +0100
+@@ -604,9 +604,6 @@ void __init xen_init_pt(void)
+ __pud(__pa_symbol(level2_kernel_pgt) | _PAGE_TABLE);
+ memcpy(level2_kernel_pgt, page, PAGE_SIZE);
+
+- __user_pgd(init_level4_pgt)[pgd_index(VSYSCALL_START)] =
+- __pgd(__pa_symbol(level3_user_pgt) | _PAGE_TABLE);
+-
+ /* Do an early initialization of the fixmap area. */
+ addr = __fix_to_virt(FIX_EARLYCON_MEM_BASE);
+ level3_kernel_pgt[pud_index(addr)] =
+@@ -616,8 +613,6 @@ void __init xen_init_pt(void)
+
+ early_make_page_readonly(init_level4_pgt,
+ XENFEAT_writable_page_tables);
+- early_make_page_readonly(__user_pgd(init_level4_pgt),
+- XENFEAT_writable_page_tables);
+ early_make_page_readonly(level3_kernel_pgt,
+ XENFEAT_writable_page_tables);
+ early_make_page_readonly(level3_user_pgt,
+Index: head-2008-12-01/arch/x86/mm/pgtable-xen.c
+===================================================================
+--- head-2008-12-01.orig/arch/x86/mm/pgtable-xen.c 2008-12-01 12:13:22.000000000 +0100
++++ head-2008-12-01/arch/x86/mm/pgtable-xen.c 2008-12-01 12:13:27.000000000 +0100
+@@ -270,9 +270,11 @@ static void pgd_walk(pgd_t *pgd_base, pg
+ BUG();
+ seq = 0;
+ }
++ pgd = __user_pgd(pgd_base);
++ BUG_ON(!pgd);
+ MULTI_update_va_mapping(mcl + seq,
+- (unsigned long)__user_pgd(pgd_base),
+- pfn_pte(virt_to_phys(__user_pgd(pgd_base))>>PAGE_SHIFT, flags),
++ (unsigned long)pgd,
++ pfn_pte(virt_to_phys(pgd)>>PAGE_SHIFT, flags),
+ 0);
+ MULTI_update_va_mapping(mcl + seq + 1,
+ (unsigned long)pgd_base,
+@@ -658,12 +660,29 @@ static void pgd_prepopulate_pmd(struct m
+ }
+ }
+
++static inline pgd_t *user_pgd_alloc(pgd_t *pgd)
++{
+ #ifdef CONFIG_X86_64
+-/* We allocate two contiguous pages for kernel and user. */
+-#define PGD_ORDER 1
+-#else
+-#define PGD_ORDER 0
++ if (pgd) {
++ pgd_t *upgd = (void *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
++
++ if (upgd)
++ virt_to_page(pgd)->index = (long)upgd;
++ else {
++ free_page((unsigned long)pgd);
++ pgd = NULL;
++ }
++ }
++#endif
++ return pgd;
++}
++
++static inline void user_pgd_free(pgd_t *pgd)
++{
++#ifdef CONFIG_X86_64
++ free_page(virt_to_page(pgd)->index);
+ #endif
++}
+
+ pgd_t *pgd_alloc(struct mm_struct *mm)
+ {
+@@ -671,7 +690,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+ pmd_t *pmds[PREALLOCATED_PMDS];
+ unsigned long flags;
+
+- pgd = (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
++ pgd = user_pgd_alloc((void *)__get_free_page(GFP_KERNEL|__GFP_ZERO));
+
+ if (pgd == NULL)
+ goto out;
+@@ -710,7 +729,8 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+ out_free_pmds:
+ free_pmds(pmds, mm, !xen_feature(XENFEAT_pae_pgdir_above_4gb));
+ out_free_pgd:
+- free_pages((unsigned long)pgd, PGD_ORDER);
++ user_pgd_free(pgd);
++ free_page((unsigned long)pgd);
+ out:
+ return NULL;
+ }
+@@ -729,7 +749,8 @@ void pgd_free(struct mm_struct *mm, pgd_
+
+ pgd_mop_up_pmds(mm, pgd);
+ paravirt_pgd_free(mm, pgd);
+- free_pages((unsigned long)pgd, PGD_ORDER);
++ user_pgd_free(pgd);
++ free_page((unsigned long)pgd);
+ }
+
+ /* blktap and gntdev need this, as otherwise they would implicitly (and
+Index: head-2008-12-01/drivers/xen/core/machine_reboot.c
+===================================================================
+--- head-2008-12-01.orig/drivers/xen/core/machine_reboot.c 2008-12-01 12:13:13.000000000 +0100
++++ head-2008-12-01/drivers/xen/core/machine_reboot.c 2008-12-01 12:13:27.000000000 +0100
+@@ -199,8 +199,7 @@ static int take_machine_down(void *_susp
+ * in fast-suspend mode as that implies a new enough Xen.
+ */
+ if (!suspend->fast_suspend)
+- xen_new_user_pt(__pa(__user_pgd(
+- current->active_mm->pgd)));
++ xen_new_user_pt(current->active_mm->pgd);
+ #endif
+ }
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 12:13:22.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/hypervisor.h 2008-12-01 12:13:27.000000000 +0100
+@@ -85,8 +85,8 @@ void do_hypervisor_callback(struct pt_re
+ * be MACHINE addresses.
+ */
+
+-void xen_pt_switch(unsigned long ptr);
+-void xen_new_user_pt(unsigned long ptr); /* x86_64 only */
++void xen_pt_switch(pgd_t *);
++void xen_new_user_pt(pgd_t *); /* x86_64 only */
+ void xen_load_gs(unsigned int selector); /* x86_64 only */
+ void xen_tlb_flush(void);
+ void xen_invlpg(unsigned long ptr);
+@@ -94,7 +94,7 @@ void xen_invlpg(unsigned long ptr);
+ void xen_l1_entry_update(pte_t *ptr, pte_t val);
+ void xen_l2_entry_update(pmd_t *ptr, pmd_t val);
+ void xen_l3_entry_update(pud_t *ptr, pud_t val); /* x86_64/PAE */
+-void xen_l4_entry_update(pgd_t *ptr, int user, pgd_t val); /* x86_64 only */
++void xen_l4_entry_update(pgd_t *ptr, pgd_t val); /* x86_64 only */
+ void xen_pgd_pin(pgd_t *);
+ void xen_pgd_unpin(pgd_t *);
+
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/mmu_context_64.h 2008-12-01 11:49:07.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/mmu_context_64.h 2008-12-01 12:13:27.000000000 +0100
+@@ -46,6 +46,7 @@ static inline void switch_mm(struct mm_s
+ {
+ unsigned cpu = smp_processor_id();
+ struct mmuext_op _op[3], *op = _op;
++ pgd_t *upgd;
+
+ if (likely(prev != next)) {
+ BUG_ON(!xen_feature(XENFEAT_writable_page_tables) &&
+@@ -64,9 +65,11 @@ static inline void switch_mm(struct mm_s
+ op->arg1.mfn = pfn_to_mfn(__pa(next->pgd) >> PAGE_SHIFT);
+ op++;
+
+- /* xen_new_user_pt(__pa(__user_pgd(next->pgd))) */
++ /* xen_new_user_pt(next->pgd) */
+ op->cmd = MMUEXT_NEW_USER_BASEPTR;
+- op->arg1.mfn = pfn_to_mfn(__pa(__user_pgd(next->pgd)) >> PAGE_SHIFT);
++ upgd = __user_pgd(next->pgd);
++ op->arg1.mfn = likely(upgd)
++ ? pfn_to_mfn(__pa(upgd) >> PAGE_SHIFT) : 0;
+ op++;
+
+ if (unlikely(next->context.ldt != prev->context.ldt)) {
+@@ -90,7 +93,7 @@ static inline void switch_mm(struct mm_s
+ * to make sure to use no freed page tables.
+ */
+ load_cr3(next->pgd);
+- xen_new_user_pt(__pa(__user_pgd(next->pgd)));
++ xen_new_user_pt(next->pgd);
+ load_LDT_nolock(&next->context);
+ }
+ }
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgalloc.h 2008-12-01 12:13:06.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgalloc.h 2008-12-01 12:13:27.000000000 +0100
+@@ -106,15 +106,13 @@ static inline void pud_populate(struct m
+ #endif /* CONFIG_X86_PAE */
+
+ #if PAGETABLE_LEVELS > 3
+-#define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
+-
+ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
+ {
+ pgd_t ent = __pgd(_PAGE_TABLE | __pa(pud));
+
+ paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
+ if (unlikely(PagePinned(virt_to_page(pgd))))
+- xen_l4_entry_update(pgd, 1, ent);
++ xen_l4_entry_update(pgd, ent);
+ else
+ *__user_pgd(pgd) = *pgd = ent;
+ }
+Index: head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h
+===================================================================
+--- head-2008-12-01.orig/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 12:13:13.000000000 +0100
++++ head-2008-12-01/include/asm-x86/mach-xen/asm/pgtable_64.h 2008-12-01 12:13:27.000000000 +0100
+@@ -131,18 +131,25 @@ static inline void xen_set_pud(pud_t *pu
+ : (void)(*__pudp = xen_make_pud(0)); \
+ })
+
+-#define __user_pgd(pgd) ((pgd) + PTRS_PER_PGD)
++static inline pgd_t *__user_pgd(pgd_t *pgd)
++{
++ if (unlikely(((unsigned long)pgd & PAGE_MASK)
++ == (unsigned long)init_level4_pgt))
++ return NULL;
++ return (pgd_t *)(virt_to_page(pgd)->index
++ + ((unsigned long)pgd & ~PAGE_MASK));
++}
+
+ static inline void xen_set_pgd(pgd_t *pgdp, pgd_t pgd)
+ {
+- xen_l4_entry_update(pgdp, 0, pgd);
++ xen_l4_entry_update(pgdp, pgd);
+ }
+
+ #define xen_pgd_clear(pgd) \
+ ({ \
+ pgd_t *__pgdp = (pgd); \
+ PagePinned(virt_to_page(__pgdp)) \
+- ? xen_l4_entry_update(__pgdp, 1, xen_make_pgd(0)) \
++ ? xen_l4_entry_update(__pgdp, xen_make_pgd(0)) \
+ : (void)(*__user_pgd(__pgdp) = *__pgdp = xen_make_pgd(0)); \
+ })
+
--- /dev/null
+From: jbeulich@novell.com
+Subject: dump the correct page tables for user mode faults
+Patch-mainline: obsolete
+
+Index: head-2008-11-10/arch/x86/mm/fault-xen.c
+===================================================================
+--- head-2008-11-10.orig/arch/x86/mm/fault-xen.c 2008-11-17 11:33:51.000000000 +0100
++++ head-2008-11-10/arch/x86/mm/fault-xen.c 2008-11-17 11:38:21.000000000 +0100
+@@ -189,9 +189,11 @@ static int bad_address(void *p)
+ unsigned long dummy;
+ return probe_kernel_address((unsigned long *)p, dummy);
+ }
++#else
++#define dump_pagetable(addr, krnl) dump_pagetable(addr)
+ #endif
+
+-static void dump_pagetable(unsigned long address)
++static void dump_pagetable(unsigned long address, bool kernel)
+ {
+ #ifdef CONFIG_X86_32
+ __typeof__(pte_val(__pte(0))) page;
+@@ -239,6 +241,8 @@ static void dump_pagetable(unsigned long
+ pgd = (pgd_t *)read_cr3();
+
+ pgd = __va((unsigned long)pgd & PHYSICAL_PAGE_MASK);
++ if (!kernel)
++ pgd = __user_pgd(pgd);
+ pgd += pgd_index(address);
+ if (bad_address(pgd)) goto bad;
+ printk("PGD %lx ", pgd_val(*pgd));
+@@ -419,7 +423,7 @@ static void show_fault_oops(struct pt_re
+ printk(KERN_CONT " at %p\n", (void *) address);
+ printk(KERN_ALERT "IP:");
+ printk_address(regs->ip, 1);
+- dump_pagetable(address);
++ dump_pagetable(address, !(error_code & PF_USER));
+ }
+
+ #ifdef CONFIG_X86_64
+@@ -431,7 +435,7 @@ static noinline void pgtable_bad(unsigne
+
+ printk(KERN_ALERT "%s: Corrupted page table at address %lx\n",
+ current->comm, address);
+- dump_pagetable(address);
++ dump_pagetable(address, !(error_code & PF_USER));
+ tsk = current;
+ tsk->thread.cr2 = address;
+ tsk->thread.trap_no = 14;
--- /dev/null
+--- linux-2.6.27.21/fs/aio.c 2009-03-23 22:04:09.000000000 +0000
++++ linux-2.6.27.8/fs/aio.c 2009-03-29 15:53:57.000000000 +0000
+@@ -36,6 +36,11 @@
+ #include <asm/uaccess.h>
+ #include <asm/mmu_context.h>
+
++#ifdef CONFIG_EPOLL
++#include <linux/poll.h>
++#include <linux/eventpoll.h>
++#endif
++
+ #if DEBUG > 1
+ #define dprintk printk
+ #else
+@@ -428,7 +433,7 @@
+ req->private = NULL;
+ req->ki_iovec = NULL;
+ INIT_LIST_HEAD(&req->ki_run_list);
+- req->ki_eventfd = NULL;
++ req->ki_eventfd = ERR_PTR(-EINVAL);
+
+ /* Check if the completion queue has enough free space to
+ * accept an event from this io.
+@@ -470,6 +475,8 @@
+ {
+ assert_spin_locked(&ctx->ctx_lock);
+
++ if (!IS_ERR(req->ki_eventfd))
++ fput(req->ki_eventfd);
+ if (req->ki_dtor)
+ req->ki_dtor(req);
+ if (req->ki_iovec != &req->ki_inline_vec)
+@@ -491,11 +498,8 @@
+ list_del(&req->ki_list);
+ spin_unlock_irq(&fput_lock);
+
+- /* Complete the fput(s) */
+- if (req->ki_filp != NULL)
+- __fput(req->ki_filp);
+- if (req->ki_eventfd != NULL)
+- __fput(req->ki_eventfd);
++ /* Complete the fput */
++ __fput(req->ki_filp);
+
+ /* Link the iocb into the context's free list */
+ spin_lock_irq(&ctx->ctx_lock);
+@@ -513,14 +517,12 @@
+ */
+ static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
+ {
+- int schedule_putreq = 0;
+-
+ dprintk(KERN_DEBUG "aio_put(%p): f_count=%ld\n",
+ req, atomic_long_read(&req->ki_filp->f_count));
+
+ assert_spin_locked(&ctx->ctx_lock);
+
+- req->ki_users--;
++ req->ki_users --;
+ BUG_ON(req->ki_users < 0);
+ if (likely(req->ki_users))
+ return 0;
+@@ -528,23 +530,10 @@
+ req->ki_cancel = NULL;
+ req->ki_retry = NULL;
+
+- /*
+- * Try to optimize the aio and eventfd file* puts, by avoiding to
+- * schedule work in case it is not __fput() time. In normal cases,
+- * we would not be holding the last reference to the file*, so
+- * this function will be executed w/out any aio kthread wakeup.
++ /* Must be done under the lock to serialise against cancellation.
++ * Call this aio_fput as it duplicates fput via the fput_work.
+ */
+- if (unlikely(atomic_long_dec_and_test(&req->ki_filp->f_count)))
+- schedule_putreq++;
+- else
+- req->ki_filp = NULL;
+- if (req->ki_eventfd != NULL) {
+- if (unlikely(atomic_long_dec_and_test(&req->ki_eventfd->f_count)))
+- schedule_putreq++;
+- else
+- req->ki_eventfd = NULL;
+- }
+- if (unlikely(schedule_putreq)) {
++ if (unlikely(atomic_long_dec_and_test(&req->ki_filp->f_count))) {
+ get_ioctx(ctx);
+ spin_lock(&fput_lock);
+ list_add(&req->ki_list, &fput_head);
+@@ -1008,7 +997,7 @@
+ * eventfd. The eventfd_signal() function is safe to be called
+ * from IRQ context.
+ */
+- if (iocb->ki_eventfd != NULL)
++ if (!IS_ERR(iocb->ki_eventfd))
+ eventfd_signal(iocb->ki_eventfd, 1);
+
+ put_rq:
+@@ -1026,6 +1015,11 @@
+ if (waitqueue_active(&ctx->wait))
+ wake_up(&ctx->wait);
+
++#ifdef CONFIG_EPOLL
++ if (ctx->file && waitqueue_active(&ctx->poll_wait))
++ wake_up(&ctx->poll_wait);
++#endif
++
+ spin_unlock_irqrestore(&ctx->ctx_lock, flags);
+ return ret;
+ }
+@@ -1033,6 +1027,8 @@
+ /* aio_read_evt
+ * Pull an event off of the ioctx's event ring. Returns the number of
+ * events fetched (0 or 1 ;-)
++ * If ent parameter is 0, just returns the number of events that would
++ * be fetched.
+ * FIXME: make this use cmpxchg.
+ * TODO: make the ringbuffer user mmap()able (requires FIXME).
+ */
+@@ -1055,13 +1051,18 @@
+
+ head = ring->head % info->nr;
+ if (head != ring->tail) {
+- struct io_event *evp = aio_ring_event(info, head, KM_USER1);
+- *ent = *evp;
+- head = (head + 1) % info->nr;
+- smp_mb(); /* finish reading the event before updatng the head */
+- ring->head = head;
+- ret = 1;
+- put_aio_ring_event(evp, KM_USER1);
++ if (ent) { /* event requested */
++ struct io_event *evp =
++ aio_ring_event(info, head, KM_USER1);
++ *ent = *evp;
++ head = (head + 1) % info->nr;
++ /* finish reading the event before updatng the head */
++ smp_mb();
++ ring->head = head;
++ ret = 1;
++ put_aio_ring_event(evp, KM_USER1);
++ } else /* only need to know availability */
++ ret = 1;
+ }
+ spin_unlock(&info->ring_lock);
+
+@@ -1251,6 +1252,13 @@
+
+ aio_cancel_all(ioctx);
+ wait_for_all_aios(ioctx);
++#ifdef CONFIG_EPOLL
++ /* forget the poll file, but it's up to the user to close it */
++ if (ioctx->file) {
++ ioctx->file->private_data = 0;
++ ioctx->file = 0;
++ }
++#endif
+
+ /*
+ * Wake up any waiters. The setting of ctx->dead must be seen
+@@ -1261,6 +1269,67 @@
+ put_ioctx(ioctx); /* once for the lookup */
+ }
+
++#ifdef CONFIG_EPOLL
++
++static int aio_queue_fd_close(struct inode *inode, struct file *file)
++{
++ struct kioctx *ioctx = file->private_data;
++ if (ioctx) {
++ file->private_data = 0;
++ spin_lock_irq(&ioctx->ctx_lock);
++ ioctx->file = 0;
++ spin_unlock_irq(&ioctx->ctx_lock);
++ }
++ return 0;
++}
++
++static unsigned int aio_queue_fd_poll(struct file *file, poll_table *wait)
++{ unsigned int pollflags = 0;
++ struct kioctx *ioctx = file->private_data;
++
++ if (ioctx) {
++
++ spin_lock_irq(&ioctx->ctx_lock);
++ /* Insert inside our poll wait queue */
++ poll_wait(file, &ioctx->poll_wait, wait);
++
++ /* Check our condition */
++ if (aio_read_evt(ioctx, 0))
++ pollflags = POLLIN | POLLRDNORM;
++ spin_unlock_irq(&ioctx->ctx_lock);
++ }
++
++ return pollflags;
++}
++
++static const struct file_operations aioq_fops = {
++ .release = aio_queue_fd_close,
++ .poll = aio_queue_fd_poll
++};
++
++/* make_aio_fd:
++ * Create a file descriptor that can be used to poll the event queue.
++ * Based and piggybacked on the excellent epoll code.
++ */
++
++static int make_aio_fd(struct kioctx *ioctx)
++{
++ int error, fd;
++ struct inode *inode;
++ struct file *file;
++
++ error = ep_getfd(&fd, &inode, &file, NULL, &aioq_fops);
++ if (error)
++ return error;
++
++ /* associate the file with the IO context */
++ file->private_data = ioctx;
++ ioctx->file = file;
++ init_waitqueue_head(&ioctx->poll_wait);
++ return fd;
++}
++#endif
++
+ /* sys_io_setup:
+ * Create an aio_context capable of receiving at least nr_events.
+ * ctxp must not point to an aio_context that already exists, and
+@@ -1273,18 +1342,30 @@
+ * resources are available. May fail with -EFAULT if an invalid
+ * pointer is passed for ctxp. Will fail with -ENOSYS if not
+ * implemented.
++ *
++ * To request a selectable fd, the user context has to be initialized
++ * to 1, instead of 0, and the return value is the fd.
++ * This keeps the system call compatible, since a non-zero value
++ * was not allowed so far.
+ */
+-SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
++asmlinkage long sys_io_setup(unsigned nr_events, aio_context_t __user *ctxp)
+ {
+ struct kioctx *ioctx = NULL;
+ unsigned long ctx;
+ long ret;
++ int make_fd = 0;
+
+ ret = get_user(ctx, ctxp);
+ if (unlikely(ret))
+ goto out;
+
+ ret = -EINVAL;
++#ifdef CONFIG_EPOLL
++ if (ctx == 1) {
++ make_fd = 1;
++ ctx = 0;
++ }
++#endif
+ if (unlikely(ctx || nr_events == 0)) {
+ pr_debug("EINVAL: io_setup: ctx %lu nr_events %u\n",
+ ctx, nr_events);
+@@ -1295,8 +1376,12 @@
+ ret = PTR_ERR(ioctx);
+ if (!IS_ERR(ioctx)) {
+ ret = put_user(ioctx->user_id, ctxp);
+- if (!ret)
+- return 0;
++#ifdef CONFIG_EPOLL
++ if (make_fd && ret >= 0)
++ ret = make_aio_fd(ioctx);
++#endif
++ if (ret >= 0)
++ return ret;
+
+ get_ioctx(ioctx); /* io_destroy() expects us to hold a ref */
+ io_destroy(ioctx);
+@@ -1312,7 +1397,7 @@
+ * implemented. May fail with -EFAULT if the context pointed to
+ * is invalid.
+ */
+-SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx)
++asmlinkage long sys_io_destroy(aio_context_t ctx)
+ {
+ struct kioctx *ioctx = lookup_ioctx(ctx);
+ if (likely(NULL != ioctx)) {
+@@ -1612,7 +1697,6 @@
+ req->ki_eventfd = eventfd_fget((int) iocb->aio_resfd);
+ if (IS_ERR(req->ki_eventfd)) {
+ ret = PTR_ERR(req->ki_eventfd);
+- req->ki_eventfd = NULL;
+ goto out_put_req;
+ }
+ }
+@@ -1667,8 +1751,8 @@
+ * are available to queue any iocbs. Will return 0 if nr is 0. Will
+ * fail with -ENOSYS if not implemented.
+ */
+-SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
+- struct iocb __user * __user *, iocbpp)
++asmlinkage long sys_io_submit(aio_context_t ctx_id, long nr,
++ struct iocb __user * __user *iocbpp)
+ {
+ struct kioctx *ctx;
+ long ret = 0;
+@@ -1742,8 +1826,8 @@
+ * invalid. May fail with -EAGAIN if the iocb specified was not
+ * cancelled. Will fail with -ENOSYS if not implemented.
+ */
+-SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
+- struct io_event __user *, result)
++asmlinkage long sys_io_cancel(aio_context_t ctx_id, struct iocb __user *iocb,
++ struct io_event __user *result)
+ {
+ int (*cancel)(struct kiocb *iocb, struct io_event *res);
+ struct kioctx *ctx;
+@@ -1804,11 +1888,11 @@
+ * will be updated if not NULL and the operation blocks. Will fail
+ * with -ENOSYS if not implemented.
+ */
+-SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
+- long, min_nr,
+- long, nr,
+- struct io_event __user *, events,
+- struct timespec __user *, timeout)
++asmlinkage long sys_io_getevents(aio_context_t ctx_id,
++ long min_nr,
++ long nr,
++ struct io_event __user *events,
++ struct timespec __user *timeout)
+ {
+ struct kioctx *ioctx = lookup_ioctx(ctx_id);
+ long ret = -EINVAL;
--- /dev/null
+--- linux-2.6.27.21/include/linux/skbuff.h 2009-03-29 17:24:56.000000000 +0000
++++ linux-2.6.27.8/include/linux/skbuff.h 2009-03-29 17:38:37.000000000 +0000
+@@ -217,6 +217,8 @@
+ * @local_df: allow local fragmentation
+ * @cloned: Head may be cloned (check refcnt to be sure)
+ * @nohdr: Payload reference only, must not modify header
++ * @proto_data_valid: Protocol data validated since arriving at localhost
++ * @proto_csum_blank: Protocol csum must be added before leaving localhost
+ * @pkt_type: Packet class
+ * @fclone: skbuff clone status
+ * @ip_summed: Driver fed us an IP checksum
+@@ -320,7 +322,11 @@
+ #if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
+ __u8 do_not_encrypt:1;
+ #endif
+- /* 0/13/14 bit hole */
++#ifdef CONFIG_XEN
++ __u8 proto_data_valid:1,
++ proto_csum_blank:1;
++#endif
++ /* 10-16 bit hole */
+
+ #ifdef CONFIG_NET_DMA
+ dma_cookie_t dma_cookie;
projects / people / stevee / ipfire-2.x.git / commitdiff
